drivers/scsi/qla2xxx/qla_target.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   4  *
   5  *  based on qla2x00t.c code:
   6  *
   7  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   8  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   9  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
  10  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  11  *
  12  *  Forward port and refactoring to modern qla2xxx and target/configfs
  13  *
  14  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/types.h>
  20 #include <linux/blkdev.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/pci.h>
  23 #include <linux/delay.h>
  24 #include <linux/list.h>
  25 #include <linux/workqueue.h>
  26 #include <asm/unaligned.h>
  27 #include <scsi/scsi.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_tcq.h>
  30
  31 #include "qla_def.h"
  32 #include "qla_target.h"
  33
  34 static int ql2xtgt_tape_enable;
  35 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  36 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  37                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  38
  39 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  40 module_param(qlini_mode, charp, S_IRUGO);
  41 MODULE_PARM_DESC(qlini_mode,
  42         "Determines when initiator mode will be enabled. Possible values: "
  43         "\"exclusive\" - initiator mode will be enabled on load, "
  44         "disabled on enabling target mode and then on disabling target mode "
  45         "enabled back; "
  46         "\"disabled\" - initiator mode will never be enabled; "
  47         "\"dual\" - Initiator Modes will be enabled. Target Mode can be activated "
  48         "when ready "
  49         "\"enabled\" (default) - initiator mode will always stay enabled.");
  50
  51 static int ql_dm_tgt_ex_pct = 0;
  52 module_param(ql_dm_tgt_ex_pct, int, S_IRUGO|S_IWUSR);
  53 MODULE_PARM_DESC(ql_dm_tgt_ex_pct,
  54         "For Dual Mode (qlini_mode=dual), this parameter determines "
  55         "the percentage of exchanges/cmds FW will allocate resources "
  56         "for Target mode.");
  57
  58 int ql2xuctrlirq = 1;
  59 module_param(ql2xuctrlirq, int, 0644);
  60 MODULE_PARM_DESC(ql2xuctrlirq,
  61     "User to control IRQ placement via smp_affinity."
  62     "Valid with qlini_mode=disabled."
  63     "1(default): enable");
  64
  65 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  66
  67 static int qla_sam_status = SAM_STAT_BUSY;
  68 static int tc_sam_status = SAM_STAT_TASK_SET_FULL; /* target core */
  69
  70 /*
  71  * From scsi/fc/fc_fcp.h
  72  */
  73 enum fcp_resp_rsp_codes {
  74         FCP_TMF_CMPL = 0,
  75         FCP_DATA_LEN_INVALID = 1,
  76         FCP_CMND_FIELDS_INVALID = 2,
  77         FCP_DATA_PARAM_MISMATCH = 3,
  78         FCP_TMF_REJECTED = 4,
  79         FCP_TMF_FAILED = 5,
  80         FCP_TMF_INVALID_LUN = 9,
  81 };
  82
  83 /*
  84  * fc_pri_ta from scsi/fc/fc_fcp.h
  85  */
  86 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  87 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  88 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  89 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  90 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  91 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  92 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  93
  94 /*
  95  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  96  * must be called under HW lock and could unlock/lock it inside.
  97  * It isn't an issue, since in the current implementation on the time when
  98  * those functions are called:
  99  *
 100  *   - Either context is IRQ and only IRQ handler can modify HW data,
 101  *     including rings related fields,
 102  *
 103  *   - Or access to target mode variables from struct qla_tgt doesn't
 104  *     cross those functions boundaries, except tgt_stop, which
 105  *     additionally protected by irq_cmd_count.
 106  */
 107 /* Predefs for callbacks handed to qla2xxx LLD */
 108 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 109         struct atio_from_isp *pkt, uint8_t);
 110 static void qlt_response_pkt(struct scsi_qla_host *ha, struct rsp_que *rsp,
 111         response_t *pkt);
 112 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 113         int fn, void *iocb, int flags);
 114 static void qlt_send_term_exchange(struct qla_qpair *, struct qla_tgt_cmd
 115         *cmd, struct atio_from_isp *atio, int ha_locked, int ul_abort);
 116 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 117         struct atio_from_isp *atio, uint16_t status, int qfull);
 118 static void qlt_disable_vha(struct scsi_qla_host *vha);
 119 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 120 static void qlt_send_notify_ack(struct qla_qpair *qpair,
 121         struct imm_ntfy_from_isp *ntfy,
 122         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 123         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 124 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
 125         struct imm_ntfy_from_isp *imm, int ha_locked);
 126 static struct fc_port *qlt_create_sess(struct scsi_qla_host *vha,
 127         fc_port_t *fcport, bool local);
 128 void qlt_unreg_sess(struct fc_port *sess);
 129 static void qlt_24xx_handle_abts(struct scsi_qla_host *,
 130         struct abts_recv_from_24xx *);
 131 static void qlt_send_busy(struct qla_qpair *, struct atio_from_isp *,
 132     uint16_t);
 133 static int qlt_check_reserve_free_req(struct qla_qpair *qpair, uint32_t);
 134 static inline uint32_t qlt_make_handle(struct qla_qpair *);
 135
 136 /*
 137  * Global Variables
 138  */
 139 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 140 struct kmem_cache *qla_tgt_plogi_cachep;
 141 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 142 static struct workqueue_struct *qla_tgt_wq;
 143 static DEFINE_MUTEX(qla_tgt_mutex);
 144 static LIST_HEAD(qla_tgt_glist);
 145
 146 static const char *prot_op_str(u32 prot_op)
 147 {
 148         switch (prot_op) {
 149         case TARGET_PROT_NORMAL:        return "NORMAL";
 150         case TARGET_PROT_DIN_INSERT:    return "DIN_INSERT";
 151         case TARGET_PROT_DOUT_INSERT:   return "DOUT_INSERT";
 152         case TARGET_PROT_DIN_STRIP:     return "DIN_STRIP";
 153         case TARGET_PROT_DOUT_STRIP:    return "DOUT_STRIP";
 154         case TARGET_PROT_DIN_PASS:      return "DIN_PASS";
 155         case TARGET_PROT_DOUT_PASS:     return "DOUT_PASS";
 156         default:                        return "UNKNOWN";
 157         }
 158 }
 159
 160 /* This API intentionally takes dest as a parameter, rather than returning
 161  * int value to avoid caller forgetting to issue wmb() after the store */
 162 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 163 {
 164         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 165         *dest = atomic_inc_return(&base_vha->generation_tick);
 166         /* memory barrier */
 167         wmb();
 168 }
 169
 170 /* Might release hw lock, then reaquire!! */
 171 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 172 {
 173         /* Send marker if required */
 174         if (unlikely(vha->marker_needed != 0)) {
 175                 int rc = qla2x00_issue_marker(vha, vha_locked);
 176
 177                 if (rc != QLA_SUCCESS) {
 178                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 179                             "qla_target(%d): issue_marker() failed\n",
 180                             vha->vp_idx);
 181                 }
 182                 return rc;
 183         }
 184         return QLA_SUCCESS;
 185 }
 186
 187 struct scsi_qla_host *qla_find_host_by_d_id(struct scsi_qla_host *vha,
 188                                             be_id_t d_id)
 189 {
 190         struct scsi_qla_host *host;
 191         uint32_t key;
 192
 193         if (vha->d_id.b.area == d_id.area &&
 194             vha->d_id.b.domain == d_id.domain &&
 195             vha->d_id.b.al_pa == d_id.al_pa)
 196                 return vha;
 197
 198         key = be_to_port_id(d_id).b24;
 199
 200         host = btree_lookup32(&vha->hw->host_map, key);
 201         if (!host)
 202                 ql_dbg(ql_dbg_tgt_mgt + ql_dbg_verbose, vha, 0xf005,
 203                     "Unable to find host %06x\n", key);
 204
 205         return host;
 206 }
 207
 208 static inline
 209 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 210         uint16_t vp_idx)
 211 {
 212         struct qla_hw_data *ha = vha->hw;
 213
 214         if (vha->vp_idx == vp_idx)
 215                 return vha;
 216
 217         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 218         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 219                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 220
 221         return NULL;
 222 }
 223
 224 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 225 {
 226         unsigned long flags;
 227
 228         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 229
 230         vha->hw->tgt.num_pend_cmds++;
 231         if (vha->hw->tgt.num_pend_cmds > vha->qla_stats.stat_max_pend_cmds)
 232                 vha->qla_stats.stat_max_pend_cmds =
 233                         vha->hw->tgt.num_pend_cmds;
 234         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 235 }
 236 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 237 {
 238         unsigned long flags;
 239
 240         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 241         vha->hw->tgt.num_pend_cmds--;
 242         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 243 }
 244
 245
 246 static void qlt_queue_unknown_atio(scsi_qla_host_t *vha,
 247         struct atio_from_isp *atio, uint8_t ha_locked)
 248 {
 249         struct qla_tgt_sess_op *u;
 250         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 251         unsigned long flags;
 252
 253         if (tgt->tgt_stop) {
 254                 ql_dbg(ql_dbg_async, vha, 0x502c,
 255                     "qla_target(%d): dropping unknown ATIO_TYPE7, because tgt is being stopped",
 256                     vha->vp_idx);
 257                 goto out_term;
 258         }
 259
 260         u = kzalloc(sizeof(*u), GFP_ATOMIC);
 261         if (u == NULL)
 262                 goto out_term;
 263
 264         u->vha = vha;
 265         memcpy(&u->atio, atio, sizeof(*atio));
 266         INIT_LIST_HEAD(&u->cmd_list);
 267
 268         spin_lock_irqsave(&vha->cmd_list_lock, flags);
 269         list_add_tail(&u->cmd_list, &vha->unknown_atio_list);
 270         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 271
 272         schedule_delayed_work(&vha->unknown_atio_work, 1);
 273
 274 out:
 275         return;
 276
 277 out_term:
 278         qlt_send_term_exchange(vha->hw->base_qpair, NULL, atio, ha_locked, 0);
 279         goto out;
 280 }
 281
 282 static void qlt_try_to_dequeue_unknown_atios(struct scsi_qla_host *vha,
 283         uint8_t ha_locked)
 284 {
 285         struct qla_tgt_sess_op *u, *t;
 286         scsi_qla_host_t *host;
 287         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 288         unsigned long flags;
 289         uint8_t queued = 0;
 290
 291         list_for_each_entry_safe(u, t, &vha->unknown_atio_list, cmd_list) {
 292                 if (u->aborted) {
 293                         ql_dbg(ql_dbg_async, vha, 0x502e,
 294                             "Freeing unknown %s %p, because of Abort\n",
 295                             "ATIO_TYPE7", u);
 296                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 297                             &u->atio, ha_locked, 0);
 298                         goto abort;
 299                 }
 300
 301                 host = qla_find_host_by_d_id(vha, u->atio.u.isp24.fcp_hdr.d_id);
 302                 if (host != NULL) {
 303                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x502f,
 304                             "Requeuing unknown ATIO_TYPE7 %p\n", u);
 305                         qlt_24xx_atio_pkt(host, &u->atio, ha_locked);
 306                 } else if (tgt->tgt_stop) {
 307                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503a,
 308                             "Freeing unknown %s %p, because tgt is being stopped\n",
 309                             "ATIO_TYPE7", u);
 310                         qlt_send_term_exchange(vha->hw->base_qpair, NULL,
 311                             &u->atio, ha_locked, 0);
 312                 } else {
 313                         ql_dbg(ql_dbg_async + ql_dbg_verbose, vha, 0x503d,
 314                             "Reschedule u %p, vha %p, host %p\n", u, vha, host);
 315                         if (!queued) {
 316                                 queued = 1;
 317                                 schedule_delayed_work(&vha->unknown_atio_work,
 318                                     1);
 319                         }
 320                         continue;
 321                 }
 322
 323 abort:
 324                 spin_lock_irqsave(&vha->cmd_list_lock, flags);
 325                 list_del(&u->cmd_list);
 326                 spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
 327                 kfree(u);
 328         }
 329 }
 330
 331 void qlt_unknown_atio_work_fn(struct work_struct *work)
 332 {
 333         struct scsi_qla_host *vha = container_of(to_delayed_work(work),
 334             struct scsi_qla_host, unknown_atio_work);
 335
 336         qlt_try_to_dequeue_unknown_atios(vha, 0);
 337 }
 338
 339 static bool qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 340         struct atio_from_isp *atio, uint8_t ha_locked)
 341 {
 342         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 343                 "%s: qla_target(%d): type %x ox_id %04x\n",
 344                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 345                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 346
 347         switch (atio->u.raw.entry_type) {
 348         case ATIO_TYPE7:
 349         {
 350                 struct scsi_qla_host *host = qla_find_host_by_d_id(vha,
 351                     atio->u.isp24.fcp_hdr.d_id);
 352                 if (unlikely(NULL == host)) {
 353                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 354                             "qla_target(%d): Received ATIO_TYPE7 "
 355                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 356                             atio->u.isp24.fcp_hdr.d_id.domain,
 357                             atio->u.isp24.fcp_hdr.d_id.area,
 358                             atio->u.isp24.fcp_hdr.d_id.al_pa);
 359
 360
 361                         qlt_queue_unknown_atio(vha, atio, ha_locked);
 362                         break;
 363                 }
 364                 if (unlikely(!list_empty(&vha->unknown_atio_list)))
 365                         qlt_try_to_dequeue_unknown_atios(vha, ha_locked);
 366
 367                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 368                 break;
 369         }
 370
 371         case IMMED_NOTIFY_TYPE:
 372         {
 373                 struct scsi_qla_host *host = vha;
 374                 struct imm_ntfy_from_isp *entry =
 375                     (struct imm_ntfy_from_isp *)atio;
 376
 377                 qlt_issue_marker(vha, ha_locked);
 378
 379                 if ((entry->u.isp24.vp_index != 0xFF) &&
 380                     (entry->u.isp24.nport_handle != cpu_to_le16(0xFFFF))) {
 381                         host = qlt_find_host_by_vp_idx(vha,
 382                             entry->u.isp24.vp_index);
 383                         if (unlikely(!host)) {
 384                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 385                                     "qla_target(%d): Received "
 386                                     "ATIO (IMMED_NOTIFY_TYPE) "
 387                                     "with unknown vp_index %d\n",
 388                                     vha->vp_idx, entry->u.isp24.vp_index);
 389                                 break;
 390                         }
 391                 }
 392                 qlt_24xx_atio_pkt(host, atio, ha_locked);
 393                 break;
 394         }
 395
 396         case VP_RPT_ID_IOCB_TYPE:
 397                 qla24xx_report_id_acquisition(vha,
 398                         (struct vp_rpt_id_entry_24xx *)atio);
 399                 break;
 400
 401         case ABTS_RECV_24XX:
 402         {
 403                 struct abts_recv_from_24xx *entry =
 404                         (struct abts_recv_from_24xx *)atio;
 405                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 406                         entry->vp_index);
 407                 unsigned long flags;
 408
 409                 if (unlikely(!host)) {
 410                         ql_dbg(ql_dbg_tgt, vha, 0xe00a,
 411                             "qla_target(%d): Response pkt (ABTS_RECV_24XX) "
 412                             "received, with unknown vp_index %d\n",
 413                             vha->vp_idx, entry->vp_index);
 414                         break;
 415                 }
 416                 if (!ha_locked)
 417                         spin_lock_irqsave(&host->hw->hardware_lock, flags);
 418                 qlt_24xx_handle_abts(host, (struct abts_recv_from_24xx *)atio);
 419                 if (!ha_locked)
 420                         spin_unlock_irqrestore(&host->hw->hardware_lock, flags);
 421                 break;
 422         }
 423
 424         /* case PUREX_IOCB_TYPE: ql2xmvasynctoatio */
 425
 426         default:
 427                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 428                     "qla_target(%d): Received unknown ATIO atio "
 429                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 430                 break;
 431         }
 432
 433         return false;
 434 }
 435
 436 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 437         struct rsp_que *rsp, response_t *pkt)
 438 {
 439         switch (pkt->entry_type) {
 440         case CTIO_CRC2:
 441                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 442                         "qla_target(%d):%s: CRC2 Response pkt\n",
 443                         vha->vp_idx, __func__);
 444                 fallthrough;
 445         case CTIO_TYPE7:
 446         {
 447                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 448                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 449                     entry->vp_index);
 450                 if (unlikely(!host)) {
 451                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 452                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 453                             "received, with unknown vp_index %d\n",
 454                             vha->vp_idx, entry->vp_index);
 455                         break;
 456                 }
 457                 qlt_response_pkt(host, rsp, pkt);
 458                 break;
 459         }
 460
 461         case IMMED_NOTIFY_TYPE:
 462         {
 463                 struct scsi_qla_host *host;
 464                 struct imm_ntfy_from_isp *entry =
 465                     (struct imm_ntfy_from_isp *)pkt;
 466
 467                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 468                 if (unlikely(!host)) {
 469                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 470                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 471                             "received, with unknown vp_index %d\n",
 472                             vha->vp_idx, entry->u.isp24.vp_index);
 473                         break;
 474                 }
 475                 qlt_response_pkt(host, rsp, pkt);
 476                 break;
 477         }
 478
 479         case NOTIFY_ACK_TYPE:
 480         {
 481                 struct scsi_qla_host *host = vha;
 482                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 483
 484                 if (0xFF != entry->u.isp24.vp_index) {
 485                         host = qlt_find_host_by_vp_idx(vha,
 486                             entry->u.isp24.vp_index);
 487                         if (unlikely(!host)) {
 488                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 489                                     "qla_target(%d): Response "
 490                                     "pkt (NOTIFY_ACK_TYPE) "
 491                                     "received, with unknown "
 492                                     "vp_index %d\n", vha->vp_idx,
 493                                     entry->u.isp24.vp_index);
 494                                 break;
 495                         }
 496                 }
 497                 qlt_response_pkt(host, rsp, pkt);
 498                 break;
 499         }
 500
 501         case ABTS_RECV_24XX:
 502         {
 503                 struct abts_recv_from_24xx *entry =
 504                     (struct abts_recv_from_24xx *)pkt;
 505                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 506                     entry->vp_index);
 507                 if (unlikely(!host)) {
 508                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 509                             "qla_target(%d): Response pkt "
 510                             "(ABTS_RECV_24XX) received, with unknown "
 511                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 512                         break;
 513                 }
 514                 qlt_response_pkt(host, rsp, pkt);
 515                 break;
 516         }
 517
 518         case ABTS_RESP_24XX:
 519         {
 520                 struct abts_resp_to_24xx *entry =
 521                     (struct abts_resp_to_24xx *)pkt;
 522                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 523                     entry->vp_index);
 524                 if (unlikely(!host)) {
 525                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 526                             "qla_target(%d): Response pkt "
 527                             "(ABTS_RECV_24XX) received, with unknown "
 528                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 529                         break;
 530                 }
 531                 qlt_response_pkt(host, rsp, pkt);
 532                 break;
 533         }
 534         default:
 535                 qlt_response_pkt(vha, rsp, pkt);
 536                 break;
 537         }
 538
 539 }
 540
 541 /*
 542  * All qlt_plogi_ack_t operations are protected by hardware_lock
 543  */
 544 static int qla24xx_post_nack_work(struct scsi_qla_host *vha, fc_port_t *fcport,
 545         struct imm_ntfy_from_isp *ntfy, int type)
 546 {
 547         struct qla_work_evt *e;
 548
 549         e = qla2x00_alloc_work(vha, QLA_EVT_NACK);
 550         if (!e)
 551                 return QLA_FUNCTION_FAILED;
 552
 553         e->u.nack.fcport = fcport;
 554         e->u.nack.type = type;
 555         memcpy(e->u.nack.iocb, ntfy, sizeof(struct imm_ntfy_from_isp));
 556         return qla2x00_post_work(vha, e);
 557 }
 558
 559 static void qla2x00_async_nack_sp_done(srb_t *sp, int res)
 560 {
 561         struct scsi_qla_host *vha = sp->vha;
 562         unsigned long flags;
 563
 564         ql_dbg(ql_dbg_disc, vha, 0x20f2,
 565             "Async done-%s res %x %8phC  type %d\n",
 566             sp->name, res, sp->fcport->port_name, sp->type);
 567
 568         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 569         sp->fcport->flags &= ~FCF_ASYNC_SENT;
 570         sp->fcport->chip_reset = vha->hw->base_qpair->chip_reset;
 571
 572         switch (sp->type) {
 573         case SRB_NACK_PLOGI:
 574                 sp->fcport->login_gen++;
 575                 sp->fcport->fw_login_state = DSC_LS_PLOGI_COMP;
 576                 sp->fcport->logout_on_delete = 1;
 577                 sp->fcport->plogi_nack_done_deadline = jiffies + HZ;
 578                 sp->fcport->send_els_logo = 0;
 579
 580                 if (sp->fcport->flags & FCF_FCSP_DEVICE) {
 581                         ql_dbg(ql_dbg_edif, vha, 0x20ef,
 582                             "%s %8phC edif: PLOGI- AUTH WAIT\n", __func__,
 583                             sp->fcport->port_name);
 584                         qla2x00_set_fcport_disc_state(sp->fcport,
 585                             DSC_LOGIN_AUTH_PEND);
 586                         qla2x00_post_aen_work(vha, FCH_EVT_PORT_ONLINE,
 587                             sp->fcport->d_id.b24);
 588                         qla_edb_eventcreate(vha, VND_CMD_AUTH_STATE_NEEDED, sp->fcport->d_id.b24,
 589                             0, sp->fcport);
 590                 }
 591                 break;
 592
 593         case SRB_NACK_PRLI:
 594                 sp->fcport->fw_login_state = DSC_LS_PRLI_COMP;
 595                 sp->fcport->deleted = 0;
 596                 sp->fcport->send_els_logo = 0;
 597
 598                 if (!sp->fcport->login_succ &&
 599                     !IS_SW_RESV_ADDR(sp->fcport->d_id)) {
 600                         sp->fcport->login_succ = 1;
 601
 602                         vha->fcport_count++;
 603                         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 604                         qla24xx_sched_upd_fcport(sp->fcport);
 605                         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 606                 } else {
 607                         sp->fcport->login_retry = 0;
 608                         qla2x00_set_fcport_disc_state(sp->fcport,
 609                             DSC_LOGIN_COMPLETE);
 610                         sp->fcport->deleted = 0;
 611                         sp->fcport->logout_on_delete = 1;
 612                 }
 613                 break;
 614
 615         case SRB_NACK_LOGO:
 616                 sp->fcport->login_gen++;
 617                 sp->fcport->fw_login_state = DSC_LS_PORT_UNAVAIL;
 618                 qlt_logo_completion_handler(sp->fcport, MBS_COMMAND_COMPLETE);
 619                 break;
 620         }
 621         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 622
 623         kref_put(&sp->cmd_kref, qla2x00_sp_release);
 624 }
 625
 626 int qla24xx_async_notify_ack(scsi_qla_host_t *vha, fc_port_t *fcport,
 627         struct imm_ntfy_from_isp *ntfy, int type)
 628 {
 629         int rval = QLA_FUNCTION_FAILED;
 630         srb_t *sp;
 631         char *c = NULL;
 632
 633         fcport->flags |= FCF_ASYNC_SENT;
 634         switch (type) {
 635         case SRB_NACK_PLOGI:
 636                 fcport->fw_login_state = DSC_LS_PLOGI_PEND;
 637                 c = "PLOGI";
 638                 if (vha->hw->flags.edif_enabled &&
 639                     (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP))
 640                         fcport->flags |= FCF_FCSP_DEVICE;
 641                 break;
 642         case SRB_NACK_PRLI:
 643                 fcport->fw_login_state = DSC_LS_PRLI_PEND;
 644                 fcport->deleted = 0;
 645                 c = "PRLI";
 646                 break;
 647         case SRB_NACK_LOGO:
 648                 fcport->fw_login_state = DSC_LS_LOGO_PEND;
 649                 c = "LOGO";
 650                 break;
 651         }
 652
 653         sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 654         if (!sp)
 655                 goto done;
 656
 657         sp->type = type;
 658         sp->name = "nack";
 659         qla2x00_init_async_sp(sp, qla2x00_get_async_timeout(vha) + 2,
 660                               qla2x00_async_nack_sp_done);
 661
 662         sp->u.iocb_cmd.u.nack.ntfy = ntfy;
 663
 664         ql_dbg(ql_dbg_disc, vha, 0x20f4,
 665             "Async-%s %8phC hndl %x %s\n",
 666             sp->name, fcport->port_name, sp->handle, c);
 667
 668         rval = qla2x00_start_sp(sp);
 669         if (rval != QLA_SUCCESS)
 670                 goto done_free_sp;
 671
 672         return rval;
 673
 674 done_free_sp:
 675         kref_put(&sp->cmd_kref, qla2x00_sp_release);
 676 done:
 677         fcport->flags &= ~FCF_ASYNC_SENT;
 678         return rval;
 679 }
 680
 681 void qla24xx_do_nack_work(struct scsi_qla_host *vha, struct qla_work_evt *e)
 682 {
 683         fc_port_t *t;
 684
 685         switch (e->u.nack.type) {
 686         case SRB_NACK_PRLI:
 687                 t = e->u.nack.fcport;
 688                 flush_work(&t->del_work);
 689                 flush_work(&t->free_work);
 690                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 691                 t = qlt_create_sess(vha, e->u.nack.fcport, 0);
 692                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 693                 if (t) {
 694                         ql_log(ql_log_info, vha, 0xd034,
 695                             "%s create sess success %p", __func__, t);
 696                         /* create sess has an extra kref */
 697                         vha->hw->tgt.tgt_ops->put_sess(e->u.nack.fcport);
 698                 }
 699                 break;
 700         }
 701         qla24xx_async_notify_ack(vha, e->u.nack.fcport,
 702             (struct imm_ntfy_from_isp *)e->u.nack.iocb, e->u.nack.type);
 703 }
 704
 705 void qla24xx_delete_sess_fn(struct work_struct *work)
 706 {
 707         fc_port_t *fcport = container_of(work, struct fc_port, del_work);
 708         struct qla_hw_data *ha = NULL;
 709
 710         if (!fcport || !fcport->vha || !fcport->vha->hw)
 711                 return;
 712
 713         ha = fcport->vha->hw;
 714
 715         if (fcport->se_sess) {
 716                 ha->tgt.tgt_ops->shutdown_sess(fcport);
 717                 ha->tgt.tgt_ops->put_sess(fcport);
 718         } else {
 719                 qlt_unreg_sess(fcport);
 720         }
 721 }
 722
 723 /*
 724  * Called from qla2x00_reg_remote_port()
 725  */
 726 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 727 {
 728         struct qla_hw_data *ha = vha->hw;
 729         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 730         struct fc_port *sess = fcport;
 731         unsigned long flags;
 732
 733         if (!vha->hw->tgt.tgt_ops)
 734                 return;
 735
 736         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 737         if (tgt->tgt_stop) {
 738                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 739                 return;
 740         }
 741
 742         if (fcport->disc_state == DSC_DELETE_PEND) {
 743                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 744                 return;
 745         }
 746
 747         if (!sess->se_sess) {
 748                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 749
 750                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 751                 sess = qlt_create_sess(vha, fcport, false);
 752                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 753
 754                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
 755         } else {
 756                 if (fcport->fw_login_state == DSC_LS_PRLI_COMP) {
 757                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 758                         return;
 759                 }
 760
 761                 if (!kref_get_unless_zero(&sess->sess_kref)) {
 762                         ql_dbg(ql_dbg_disc, vha, 0x2107,
 763                             "%s: kref_get fail sess %8phC \n",
 764                             __func__, sess->port_name);
 765                         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 766                         return;
 767                 }
 768
 769                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 770                     "qla_target(%u): %ssession for port %8phC "
 771                     "(loop ID %d) reappeared\n", vha->vp_idx,
 772                     sess->local ? "local " : "", sess->port_name, sess->loop_id);
 773
 774                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 775                     "Reappeared sess %p\n", sess);
 776
 777                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id,
 778                     fcport->loop_id,
 779                     (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 780         }
 781
 782         if (sess && sess->local) {
 783                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 784                     "qla_target(%u): local session for "
 785                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 786                     fcport->port_name, sess->loop_id);
 787                 sess->local = 0;
 788         }
 789         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
 790
 791         ha->tgt.tgt_ops->put_sess(sess);
 792 }
 793
 794 /*
 795  * This is a zero-base ref-counting solution, since hardware_lock
 796  * guarantees that ref_count is not modified concurrently.
 797  * Upon successful return content of iocb is undefined
 798  */
 799 static struct qlt_plogi_ack_t *
 800 qlt_plogi_ack_find_add(struct scsi_qla_host *vha, port_id_t *id,
 801                        struct imm_ntfy_from_isp *iocb)
 802 {
 803         struct qlt_plogi_ack_t *pla;
 804
 805         lockdep_assert_held(&vha->hw->hardware_lock);
 806
 807         list_for_each_entry(pla, &vha->plogi_ack_list, list) {
 808                 if (pla->id.b24 == id->b24) {
 809                         ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0x210d,
 810                             "%s %d %8phC Term INOT due to new INOT",
 811                             __func__, __LINE__,
 812                             pla->iocb.u.isp24.port_name);
 813                         qlt_send_term_imm_notif(vha, &pla->iocb, 1);
 814                         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 815                         return pla;
 816                 }
 817         }
 818
 819         pla = kmem_cache_zalloc(qla_tgt_plogi_cachep, GFP_ATOMIC);
 820         if (!pla) {
 821                 ql_dbg(ql_dbg_async, vha, 0x5088,
 822                        "qla_target(%d): Allocation of plogi_ack failed\n",
 823                        vha->vp_idx);
 824                 return NULL;
 825         }
 826
 827         memcpy(&pla->iocb, iocb, sizeof(pla->iocb));
 828         pla->id = *id;
 829         list_add_tail(&pla->list, &vha->plogi_ack_list);
 830
 831         return pla;
 832 }
 833
 834 void qlt_plogi_ack_unref(struct scsi_qla_host *vha,
 835     struct qlt_plogi_ack_t *pla)
 836 {
 837         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 838         port_id_t port_id;
 839         uint16_t loop_id;
 840         fc_port_t *fcport = pla->fcport;
 841
 842         BUG_ON(!pla->ref_count);
 843         pla->ref_count--;
 844
 845         if (pla->ref_count)
 846                 return;
 847
 848         ql_dbg(ql_dbg_disc, vha, 0x5089,
 849             "Sending PLOGI ACK to wwn %8phC s_id %02x:%02x:%02x loop_id %#04x"
 850             " exch %#x ox_id %#x\n", iocb->u.isp24.port_name,
 851             iocb->u.isp24.port_id[2], iocb->u.isp24.port_id[1],
 852             iocb->u.isp24.port_id[0],
 853             le16_to_cpu(iocb->u.isp24.nport_handle),
 854             iocb->u.isp24.exchange_address, iocb->ox_id);
 855
 856         port_id.b.domain = iocb->u.isp24.port_id[2];
 857         port_id.b.area   = iocb->u.isp24.port_id[1];
 858         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
 859         port_id.b.rsvd_1 = 0;
 860
 861         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
 862
 863         fcport->loop_id = loop_id;
 864         fcport->d_id = port_id;
 865         if (iocb->u.isp24.status_subcode == ELS_PLOGI)
 866                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PLOGI);
 867         else
 868                 qla24xx_post_nack_work(vha, fcport, iocb, SRB_NACK_PRLI);
 869
 870         list_for_each_entry(fcport, &vha->vp_fcports, list) {
 871                 if (fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] == pla)
 872                         fcport->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
 873                 if (fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] == pla)
 874                         fcport->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
 875         }
 876
 877         list_del(&pla->list);
 878         kmem_cache_free(qla_tgt_plogi_cachep, pla);
 879 }
 880
 881 void
 882 qlt_plogi_ack_link(struct scsi_qla_host *vha, struct qlt_plogi_ack_t *pla,
 883     struct fc_port *sess, enum qlt_plogi_link_t link)
 884 {
 885         struct imm_ntfy_from_isp *iocb = &pla->iocb;
 886         /* Inc ref_count first because link might already be pointing at pla */
 887         pla->ref_count++;
 888
 889         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf097,
 890                 "Linking sess %p [%d] wwn %8phC with PLOGI ACK to wwn %8phC"
 891                 " s_id %02x:%02x:%02x, ref=%d pla %p link %d\n",
 892                 sess, link, sess->port_name,
 893                 iocb->u.isp24.port_name, iocb->u.isp24.port_id[2],
 894                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
 895                 pla->ref_count, pla, link);
 896
 897         if (link == QLT_PLOGI_LINK_CONFLICT) {
 898                 switch (sess->disc_state) {
 899                 case DSC_DELETED:
 900                 case DSC_DELETE_PEND:
 901                         pla->ref_count--;
 902                         return;
 903                 default:
 904                         break;
 905                 }
 906         }
 907
 908         if (sess->plogi_link[link])
 909                 qlt_plogi_ack_unref(vha, sess->plogi_link[link]);
 910
 911         if (link == QLT_PLOGI_LINK_SAME_WWN)
 912                 pla->fcport = sess;
 913
 914         sess->plogi_link[link] = pla;
 915 }
 916
 917 typedef struct {
 918         /* These fields must be initialized by the caller */
 919         port_id_t id;
 920         /*
 921          * number of cmds dropped while we were waiting for
 922          * initiator to ack LOGO initialize to 1 if LOGO is
 923          * triggered by a command, otherwise, to 0
 924          */
 925         int cmd_count;
 926
 927         /* These fields are used by callee */
 928         struct list_head list;
 929 } qlt_port_logo_t;
 930
 931 static void
 932 qlt_send_first_logo(struct scsi_qla_host *vha, qlt_port_logo_t *logo)
 933 {
 934         qlt_port_logo_t *tmp;
 935         int res;
 936
 937         if (test_bit(PFLG_DRIVER_REMOVING, &vha->pci_flags)) {
 938                 res = 0;
 939                 goto out;
 940         }
 941
 942         mutex_lock(&vha->vha_tgt.tgt_mutex);
 943
 944         list_for_each_entry(tmp, &vha->logo_list, list) {
 945                 if (tmp->id.b24 == logo->id.b24) {
 946                         tmp->cmd_count += logo->cmd_count;
 947                         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 948                         return;
 949                 }
 950         }
 951
 952         list_add_tail(&logo->list, &vha->logo_list);
 953
 954         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 955
 956         res = qla24xx_els_dcmd_iocb(vha, ELS_DCMD_LOGO, logo->id);
 957
 958         mutex_lock(&vha->vha_tgt.tgt_mutex);
 959         list_del(&logo->list);
 960         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 961
 962 out:
 963         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf098,
 964             "Finished LOGO to %02x:%02x:%02x, dropped %d cmds, res = %#x\n",
 965             logo->id.b.domain, logo->id.b.area, logo->id.b.al_pa,
 966             logo->cmd_count, res);
 967 }
 968
 969 void qlt_free_session_done(struct work_struct *work)
 970 {
 971         struct fc_port *sess = container_of(work, struct fc_port,
 972             free_work);
 973         struct qla_tgt *tgt = sess->tgt;
 974         struct scsi_qla_host *vha = sess->vha;
 975         struct qla_hw_data *ha = vha->hw;
 976         unsigned long flags;
 977         bool logout_started = false;
 978         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
 979         struct qlt_plogi_ack_t *own =
 980                 sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
 981
 982         ql_dbg(ql_dbg_disc, vha, 0xf084,
 983                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 984                 " s_id %02x:%02x:%02x logout %d keep %d els_logo %d\n",
 985                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 986                 sess->d_id.b.domain, sess->d_id.b.area, sess->d_id.b.al_pa,
 987                 sess->logout_on_delete, sess->keep_nport_handle,
 988                 sess->send_els_logo);
 989
 990         if (!IS_SW_RESV_ADDR(sess->d_id)) {
 991                 if (ha->flags.edif_enabled &&
 992                     (!own || own->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
 993                         sess->edif.authok = 0;
 994                         if (!ha->flags.host_shutting_down) {
 995                                 ql_dbg(ql_dbg_edif, vha, 0x911e,
 996                                         "%s wwpn %8phC calling qla2x00_release_all_sadb\n",
 997                                         __func__, sess->port_name);
 998                                 qla2x00_release_all_sadb(vha, sess);
 999                         } else {
1000                                 ql_dbg(ql_dbg_edif, vha, 0x911e,
1001                                         "%s bypassing release_all_sadb\n",
1002                                         __func__);
1003                         }
1004                         qla_edif_clear_appdata(vha, sess);
1005                         qla_edif_sess_down(vha, sess);
1006                 }
1007                 qla2x00_mark_device_lost(vha, sess, 0);
1008
1009                 if (sess->send_els_logo) {
1010                         qlt_port_logo_t logo;
1011
1012                         logo.id = sess->d_id;
1013                         logo.cmd_count = 0;
1014                         INIT_LIST_HEAD(&logo.list);
1015                         if (!own)
1016                                 qlt_send_first_logo(vha, &logo);
1017                         sess->send_els_logo = 0;
1018                 }
1019
1020                 if (sess->logout_on_delete && sess->loop_id != FC_NO_LOOP_ID) {
1021                         int rc;
1022
1023                         if (!own ||
1024                              (own->iocb.u.isp24.status_subcode == ELS_PLOGI)) {
1025                                 sess->logout_completed = 0;
1026                                 rc = qla2x00_post_async_logout_work(vha, sess,
1027                                     NULL);
1028                                 if (rc != QLA_SUCCESS)
1029                                         ql_log(ql_log_warn, vha, 0xf085,
1030                                             "Schedule logo failed sess %p rc %d\n",
1031                                             sess, rc);
1032                                 else
1033                                         logout_started = true;
1034                         } else if (own && (own->iocb.u.isp24.status_subcode ==
1035                                 ELS_PRLI) && ha->flags.rida_fmt2) {
1036                                 rc = qla2x00_post_async_prlo_work(vha, sess,
1037                                     NULL);
1038                                 if (rc != QLA_SUCCESS)
1039                                         ql_log(ql_log_warn, vha, 0xf085,
1040                                             "Schedule PRLO failed sess %p rc %d\n",
1041                                             sess, rc);
1042                                 else
1043                                         logout_started = true;
1044                         }
1045                 } /* if sess->logout_on_delete */
1046
1047                 if (sess->nvme_flag & NVME_FLAG_REGISTERED &&
1048                     !(sess->nvme_flag & NVME_FLAG_DELETING)) {
1049                         sess->nvme_flag |= NVME_FLAG_DELETING;
1050                         qla_nvme_unregister_remote_port(sess);
1051                 }
1052         }
1053
1054         /*
1055          * Release the target session for FC Nexus from fabric module code.
1056          */
1057         if (sess->se_sess != NULL)
1058                 ha->tgt.tgt_ops->free_session(sess);
1059
1060         if (logout_started) {
1061                 bool traced = false;
1062                 u16 cnt = 0;
1063
1064                 while (!READ_ONCE(sess->logout_completed)) {
1065                         if (!traced) {
1066                                 ql_dbg(ql_dbg_disc, vha, 0xf086,
1067                                         "%s: waiting for sess %p logout\n",
1068                                         __func__, sess);
1069                                 traced = true;
1070                         }
1071                         msleep(100);
1072                         cnt++;
1073                         /*
1074                          * Driver timeout is set to 22 Sec, update count value to loop
1075                          * long enough for log-out to complete before advancing. Otherwise,
1076                          * straddling logout can interfere with re-login attempt.
1077                          */
1078                         if (cnt > 230)
1079                                 break;
1080                 }
1081
1082                 ql_dbg(ql_dbg_disc, vha, 0xf087,
1083                     "%s: sess %p logout completed\n", __func__, sess);
1084         }
1085
1086         if (sess->logo_ack_needed) {
1087                 sess->logo_ack_needed = 0;
1088                 qla24xx_async_notify_ack(vha, sess,
1089                         (struct imm_ntfy_from_isp *)sess->iocb, SRB_NACK_LOGO);
1090         }
1091
1092         spin_lock_irqsave(&vha->work_lock, flags);
1093         sess->flags &= ~FCF_ASYNC_SENT;
1094         spin_unlock_irqrestore(&vha->work_lock, flags);
1095
1096         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1097         if (sess->se_sess) {
1098                 sess->se_sess = NULL;
1099                 if (tgt && !IS_SW_RESV_ADDR(sess->d_id))
1100                         tgt->sess_count--;
1101         }
1102
1103         qla2x00_set_fcport_disc_state(sess, DSC_DELETED);
1104         sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1105         sess->deleted = QLA_SESS_DELETED;
1106
1107         if (sess->login_succ && !IS_SW_RESV_ADDR(sess->d_id)) {
1108                 vha->fcport_count--;
1109                 sess->login_succ = 0;
1110         }
1111
1112         qla2x00_clear_loop_id(sess);
1113
1114         if (sess->conflict) {
1115                 sess->conflict->login_pause = 0;
1116                 sess->conflict = NULL;
1117                 if (!test_bit(UNLOADING, &vha->dpc_flags))
1118                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1119         }
1120
1121         {
1122                 struct qlt_plogi_ack_t *con =
1123                     sess->plogi_link[QLT_PLOGI_LINK_CONFLICT];
1124                 struct imm_ntfy_from_isp *iocb;
1125
1126                 own = sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN];
1127
1128                 if (con) {
1129                         iocb = &con->iocb;
1130                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf099,
1131                                  "se_sess %p / sess %p port %8phC is gone,"
1132                                  " %s (ref=%d), releasing PLOGI for %8phC (ref=%d)\n",
1133                                  sess->se_sess, sess, sess->port_name,
1134                                  own ? "releasing own PLOGI" : "no own PLOGI pending",
1135                                  own ? own->ref_count : -1,
1136                                  iocb->u.isp24.port_name, con->ref_count);
1137                         qlt_plogi_ack_unref(vha, con);
1138                         sess->plogi_link[QLT_PLOGI_LINK_CONFLICT] = NULL;
1139                 } else {
1140                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09a,
1141                             "se_sess %p / sess %p port %8phC is gone, %s (ref=%d)\n",
1142                             sess->se_sess, sess, sess->port_name,
1143                             own ? "releasing own PLOGI" :
1144                             "no own PLOGI pending",
1145                             own ? own->ref_count : -1);
1146                 }
1147
1148                 if (own) {
1149                         sess->fw_login_state = DSC_LS_PLOGI_PEND;
1150                         qlt_plogi_ack_unref(vha, own);
1151                         sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] = NULL;
1152                 }
1153         }
1154
1155         sess->explicit_logout = 0;
1156         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1157         sess->free_pending = 0;
1158
1159         qla2x00_dfs_remove_rport(vha, sess);
1160
1161         ql_dbg(ql_dbg_disc, vha, 0xf001,
1162             "Unregistration of sess %p %8phC finished fcp_cnt %d\n",
1163                 sess, sess->port_name, vha->fcport_count);
1164
1165         if (tgt && (tgt->sess_count == 0))
1166                 wake_up_all(&tgt->waitQ);
1167
1168         if (!test_bit(PFLG_DRIVER_REMOVING, &base_vha->pci_flags) &&
1169             !(vha->vp_idx && test_bit(VPORT_DELETE, &vha->dpc_flags)) &&
1170             (!tgt || !tgt->tgt_stop) && !LOOP_TRANSITION(vha)) {
1171                 switch (vha->host->active_mode) {
1172                 case MODE_INITIATOR:
1173                 case MODE_DUAL:
1174                         set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
1175                         qla2xxx_wake_dpc(vha);
1176                         break;
1177                 case MODE_TARGET:
1178                 default:
1179                         /* no-op */
1180                         break;
1181                 }
1182         }
1183
1184         if (vha->fcport_count == 0)
1185                 wake_up_all(&vha->fcport_waitQ);
1186 }
1187
1188 /* ha->tgt.sess_lock supposed to be held on entry */
1189 void qlt_unreg_sess(struct fc_port *sess)
1190 {
1191         struct scsi_qla_host *vha = sess->vha;
1192         unsigned long flags;
1193
1194         ql_dbg(ql_dbg_disc, sess->vha, 0x210a,
1195             "%s sess %p for deletion %8phC\n",
1196             __func__, sess, sess->port_name);
1197
1198         spin_lock_irqsave(&sess->vha->work_lock, flags);
1199         if (sess->free_pending) {
1200                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1201                 return;
1202         }
1203         sess->free_pending = 1;
1204         /*
1205          * Use FCF_ASYNC_SENT flag to block other cmds used in sess
1206          * management from being sent.
1207          */
1208         sess->flags |= FCF_ASYNC_SENT;
1209         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1210
1211         if (sess->se_sess)
1212                 vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
1213
1214         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1215         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1216         sess->last_rscn_gen = sess->rscn_gen;
1217         sess->last_login_gen = sess->login_gen;
1218
1219         queue_work(sess->vha->hw->wq, &sess->free_work);
1220 }
1221 EXPORT_SYMBOL(qlt_unreg_sess);
1222
1223 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
1224 {
1225         struct qla_hw_data *ha = vha->hw;
1226         struct fc_port *sess = NULL;
1227         uint16_t loop_id;
1228         int res = 0;
1229         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
1230         unsigned long flags;
1231
1232         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
1233         if (loop_id == 0xFFFF) {
1234                 /* Global event */
1235                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
1236                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1237                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
1238                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1239         } else {
1240                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1241                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
1242                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1243         }
1244
1245         ql_dbg(ql_dbg_tgt, vha, 0xe000,
1246             "Using sess for qla_tgt_reset: %p\n", sess);
1247         if (!sess) {
1248                 res = -ESRCH;
1249                 return res;
1250         }
1251
1252         ql_dbg(ql_dbg_tgt, vha, 0xe047,
1253             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
1254             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
1255             mcmd, loop_id);
1256
1257         return qlt_issue_task_mgmt(sess, 0, mcmd, iocb, QLA24XX_MGMT_SEND_NACK);
1258 }
1259
1260 static void qla24xx_chk_fcp_state(struct fc_port *sess)
1261 {
1262         if (sess->chip_reset != sess->vha->hw->base_qpair->chip_reset) {
1263                 sess->logout_on_delete = 0;
1264                 sess->logo_ack_needed = 0;
1265                 sess->fw_login_state = DSC_LS_PORT_UNAVAIL;
1266         }
1267 }
1268
1269 void qlt_schedule_sess_for_deletion(struct fc_port *sess)
1270 {
1271         struct qla_tgt *tgt = sess->tgt;
1272         unsigned long flags;
1273         u16 sec;
1274
1275         switch (sess->disc_state) {
1276         case DSC_DELETE_PEND:
1277                 return;
1278         case DSC_DELETED:
1279                 if (!sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN] &&
1280                         !sess->plogi_link[QLT_PLOGI_LINK_CONFLICT]) {
1281                         if (tgt && tgt->tgt_stop && tgt->sess_count == 0)
1282                                 wake_up_all(&tgt->waitQ);
1283
1284                         if (sess->vha->fcport_count == 0)
1285                                 wake_up_all(&sess->vha->fcport_waitQ);
1286                         return;
1287                 }
1288                 break;
1289         case DSC_UPD_FCPORT:
1290                 /*
1291                  * This port is not done reporting to upper layer.
1292                  * let it finish
1293                  */
1294                 sess->next_disc_state = DSC_DELETE_PEND;
1295                 sec = jiffies_to_msecs(jiffies -
1296                     sess->jiffies_at_registration)/1000;
1297                 if (sess->sec_since_registration < sec && sec && !(sec % 5)) {
1298                         sess->sec_since_registration = sec;
1299                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
1300                             "%s %8phC : Slow Rport registration(%d Sec)\n",
1301                             __func__, sess->port_name, sec);
1302                 }
1303                 return;
1304         default:
1305                 break;
1306         }
1307
1308         spin_lock_irqsave(&sess->vha->work_lock, flags);
1309         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1310                 spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1311                 return;
1312         }
1313         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
1314         spin_unlock_irqrestore(&sess->vha->work_lock, flags);
1315
1316         sess->prli_pend_timer = 0;
1317         qla2x00_set_fcport_disc_state(sess, DSC_DELETE_PEND);
1318
1319         qla24xx_chk_fcp_state(sess);
1320
1321         ql_dbg(ql_log_warn, sess->vha, 0xe001,
1322             "Scheduling sess %p for deletion %8phC fc4_type %x\n",
1323             sess, sess->port_name, sess->fc4_type);
1324
1325         WARN_ON(!queue_work(sess->vha->hw->wq, &sess->del_work));
1326 }
1327
1328 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
1329 {
1330         struct fc_port *sess;
1331         scsi_qla_host_t *vha = tgt->vha;
1332
1333         list_for_each_entry(sess, &vha->vp_fcports, list) {
1334                 if (sess->se_sess)
1335                         qlt_schedule_sess_for_deletion(sess);
1336         }
1337
1338         /* At this point tgt could be already dead */
1339 }
1340
1341 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, be_id_t s_id,
1342         uint16_t *loop_id)
1343 {
1344         struct qla_hw_data *ha = vha->hw;
1345         dma_addr_t gid_list_dma;
1346         struct gid_list_info *gid_list, *gid;
1347         int res, rc, i;
1348         uint16_t entries;
1349
1350         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1351             &gid_list_dma, GFP_KERNEL);
1352         if (!gid_list) {
1353                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
1354                     "qla_target(%d): DMA Alloc failed of %u\n",
1355                     vha->vp_idx, qla2x00_gid_list_size(ha));
1356                 return -ENOMEM;
1357         }
1358
1359         /* Get list of logged in devices */
1360         rc = qla24xx_gidlist_wait(vha, gid_list, gid_list_dma, &entries);
1361         if (rc != QLA_SUCCESS) {
1362                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
1363                     "qla_target(%d): get_id_list() failed: %x\n",
1364                     vha->vp_idx, rc);
1365                 res = -EBUSY;
1366                 goto out_free_id_list;
1367         }
1368
1369         gid = gid_list;
1370         res = -ENOENT;
1371         for (i = 0; i < entries; i++) {
1372                 if (gid->al_pa == s_id.al_pa &&
1373                     gid->area == s_id.area &&
1374                     gid->domain == s_id.domain) {
1375                         *loop_id = le16_to_cpu(gid->loop_id);
1376                         res = 0;
1377                         break;
1378                 }
1379                 gid = (void *)gid + ha->gid_list_info_size;
1380         }
1381
1382 out_free_id_list:
1383         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
1384             gid_list, gid_list_dma);
1385         return res;
1386 }
1387
1388 /*
1389  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
1390  * Caller must put it.
1391  */
1392 static struct fc_port *qlt_create_sess(
1393         struct scsi_qla_host *vha,
1394         fc_port_t *fcport,
1395         bool local)
1396 {
1397         struct qla_hw_data *ha = vha->hw;
1398         struct fc_port *sess = fcport;
1399         unsigned long flags;
1400
1401         if (vha->vha_tgt.qla_tgt->tgt_stop)
1402                 return NULL;
1403
1404         if (fcport->se_sess) {
1405                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1406                         ql_dbg(ql_dbg_disc, vha, 0x20f6,
1407                             "%s: kref_get_unless_zero failed for %8phC\n",
1408                             __func__, sess->port_name);
1409                         return NULL;
1410                 }
1411                 return fcport;
1412         }
1413         sess->tgt = vha->vha_tgt.qla_tgt;
1414         sess->local = local;
1415
1416         /*
1417          * Under normal circumstances we want to logout from firmware when
1418          * session eventually ends and release corresponding nport handle.
1419          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
1420          * code will adjust these flags as necessary.
1421          */
1422         sess->logout_on_delete = 1;
1423         sess->keep_nport_handle = 0;
1424         sess->logout_completed = 0;
1425
1426         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
1427             &fcport->port_name[0], sess) < 0) {
1428                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf015,
1429                     "(%d) %8phC check_initiator_node_acl failed\n",
1430                     vha->vp_idx, fcport->port_name);
1431                 return NULL;
1432         } else {
1433                 kref_init(&fcport->sess_kref);
1434                 /*
1435                  * Take an extra reference to ->sess_kref here to handle
1436                  * fc_port access across ->tgt.sess_lock reaquire.
1437                  */
1438                 if (!kref_get_unless_zero(&sess->sess_kref)) {
1439                         ql_dbg(ql_dbg_disc, vha, 0x20f7,
1440                             "%s: kref_get_unless_zero failed for %8phC\n",
1441                             __func__, sess->port_name);
1442                         return NULL;
1443                 }
1444
1445                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1446                 if (!IS_SW_RESV_ADDR(sess->d_id))
1447                         vha->vha_tgt.qla_tgt->sess_count++;
1448
1449                 qlt_do_generation_tick(vha, &sess->generation);
1450                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1451         }
1452
1453         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
1454             "Adding sess %p se_sess %p  to tgt %p sess_count %d\n",
1455             sess, sess->se_sess, vha->vha_tgt.qla_tgt,
1456             vha->vha_tgt.qla_tgt->sess_count);
1457
1458         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
1459             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
1460             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
1461             vha->vp_idx, local ?  "local " : "", fcport->port_name,
1462             fcport->loop_id, sess->d_id.b.domain, sess->d_id.b.area,
1463             sess->d_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
1464
1465         return sess;
1466 }
1467
1468 /*
1469  * max_gen - specifies maximum session generation
1470  * at which this deletion requestion is still valid
1471  */
1472 void
1473 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
1474 {
1475         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
1476         struct fc_port *sess = fcport;
1477         unsigned long flags;
1478
1479         if (!vha->hw->tgt.tgt_ops)
1480                 return;
1481
1482         if (!tgt)
1483                 return;
1484
1485         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
1486         if (tgt->tgt_stop) {
1487                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1488                 return;
1489         }
1490         if (!sess->se_sess) {
1491                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1492                 return;
1493         }
1494
1495         if (max_gen - sess->generation < 0) {
1496                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1497                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
1498                     "Ignoring stale deletion request for se_sess %p / sess %p"
1499                     " for port %8phC, req_gen %d, sess_gen %d\n",
1500                     sess->se_sess, sess, sess->port_name, max_gen,
1501                     sess->generation);
1502                 return;
1503         }
1504
1505         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
1506
1507         sess->local = 1;
1508         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
1509         qlt_schedule_sess_for_deletion(sess);
1510 }
1511
1512 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
1513 {
1514         struct qla_hw_data *ha = tgt->ha;
1515         unsigned long flags;
1516         int res;
1517         /*
1518          * We need to protect against race, when tgt is freed before or
1519          * inside wake_up()
1520          */
1521         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1522         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
1523             "tgt %p, sess_count=%d\n",
1524             tgt, tgt->sess_count);
1525         res = (tgt->sess_count == 0);
1526         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1527
1528         return res;
1529 }
1530
1531 /* Called by tcm_qla2xxx configfs code */
1532 int qlt_stop_phase1(struct qla_tgt *tgt)
1533 {
1534         struct scsi_qla_host *vha = tgt->vha;
1535         struct qla_hw_data *ha = tgt->ha;
1536         unsigned long flags;
1537
1538         mutex_lock(&ha->optrom_mutex);
1539         mutex_lock(&qla_tgt_mutex);
1540
1541         if (tgt->tgt_stop || tgt->tgt_stopped) {
1542                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
1543                     "Already in tgt->tgt_stop or tgt_stopped state\n");
1544                 mutex_unlock(&qla_tgt_mutex);
1545                 mutex_unlock(&ha->optrom_mutex);
1546                 return -EPERM;
1547         }
1548
1549         ql_dbg(ql_dbg_tgt_mgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
1550             vha->host_no, vha);
1551         /*
1552          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
1553          * Lock is needed, because we still can get an incoming packet.
1554          */
1555         mutex_lock(&vha->vha_tgt.tgt_mutex);
1556         tgt->tgt_stop = 1;
1557         qlt_clear_tgt_db(tgt);
1558         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1559         mutex_unlock(&qla_tgt_mutex);
1560
1561         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1562             "Waiting for sess works (tgt %p)", tgt);
1563         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1564         while (!list_empty(&tgt->sess_works_list)) {
1565                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1566                 flush_scheduled_work();
1567                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1568         }
1569         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1570
1571         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1572             "Waiting for tgt %p: sess_count=%d\n", tgt, tgt->sess_count);
1573
1574         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1575
1576         /* Big hammer */
1577         if (!ha->flags.host_shutting_down &&
1578             (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)))
1579                 qlt_disable_vha(vha);
1580
1581         /* Wait for sessions to clear out (just in case) */
1582         wait_event_timeout(tgt->waitQ, test_tgt_sess_count(tgt), 10*HZ);
1583         mutex_unlock(&ha->optrom_mutex);
1584
1585         return 0;
1586 }
1587 EXPORT_SYMBOL(qlt_stop_phase1);
1588
1589 /* Called by tcm_qla2xxx configfs code */
1590 void qlt_stop_phase2(struct qla_tgt *tgt)
1591 {
1592         scsi_qla_host_t *vha = tgt->vha;
1593
1594         if (tgt->tgt_stopped) {
1595                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1596                     "Already in tgt->tgt_stopped state\n");
1597                 dump_stack();
1598                 return;
1599         }
1600         if (!tgt->tgt_stop) {
1601                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1602                     "%s: phase1 stop is not completed\n", __func__);
1603                 dump_stack();
1604                 return;
1605         }
1606
1607         mutex_lock(&tgt->ha->optrom_mutex);
1608         mutex_lock(&vha->vha_tgt.tgt_mutex);
1609         tgt->tgt_stop = 0;
1610         tgt->tgt_stopped = 1;
1611         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1612         mutex_unlock(&tgt->ha->optrom_mutex);
1613
1614         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished\n",
1615             tgt);
1616
1617         switch (vha->qlini_mode) {
1618         case QLA2XXX_INI_MODE_EXCLUSIVE:
1619                 vha->flags.online = 1;
1620                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
1621                 break;
1622         default:
1623                 break;
1624         }
1625 }
1626 EXPORT_SYMBOL(qlt_stop_phase2);
1627
1628 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1629 static void qlt_release(struct qla_tgt *tgt)
1630 {
1631         scsi_qla_host_t *vha = tgt->vha;
1632         void *node;
1633         u64 key = 0;
1634         u16 i;
1635         struct qla_qpair_hint *h;
1636         struct qla_hw_data *ha = vha->hw;
1637
1638         if (!tgt->tgt_stop && !tgt->tgt_stopped)
1639                 qlt_stop_phase1(tgt);
1640
1641         if (!tgt->tgt_stopped)
1642                 qlt_stop_phase2(tgt);
1643
1644         for (i = 0; i < vha->hw->max_qpairs + 1; i++) {
1645                 unsigned long flags;
1646
1647                 h = &tgt->qphints[i];
1648                 if (h->qpair) {
1649                         spin_lock_irqsave(h->qpair->qp_lock_ptr, flags);
1650                         list_del(&h->hint_elem);
1651                         spin_unlock_irqrestore(h->qpair->qp_lock_ptr, flags);
1652                         h->qpair = NULL;
1653                 }
1654         }
1655         kfree(tgt->qphints);
1656         mutex_lock(&qla_tgt_mutex);
1657         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
1658         mutex_unlock(&qla_tgt_mutex);
1659
1660         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
1661                 btree_remove64(&tgt->lun_qpair_map, key);
1662
1663         btree_destroy64(&tgt->lun_qpair_map);
1664
1665         if (vha->vp_idx)
1666                 if (ha->tgt.tgt_ops &&
1667                     ha->tgt.tgt_ops->remove_target &&
1668                     vha->vha_tgt.target_lport_ptr)
1669                         ha->tgt.tgt_ops->remove_target(vha);
1670
1671         vha->vha_tgt.qla_tgt = NULL;
1672
1673         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1674             "Release of tgt %p finished\n", tgt);
1675
1676         kfree(tgt);
1677 }
1678
1679 /* ha->hardware_lock supposed to be held on entry */
1680 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1681         const void *param, unsigned int param_size)
1682 {
1683         struct qla_tgt_sess_work_param *prm;
1684         unsigned long flags;
1685
1686         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1687         if (!prm) {
1688                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1689                     "qla_target(%d): Unable to create session "
1690                     "work, command will be refused", 0);
1691                 return -ENOMEM;
1692         }
1693
1694         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1695             "Scheduling work (type %d, prm %p)"
1696             " to find session for param %p (size %d, tgt %p)\n",
1697             type, prm, param, param_size, tgt);
1698
1699         prm->type = type;
1700         memcpy(&prm->tm_iocb, param, param_size);
1701
1702         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1703         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1704         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1705
1706         schedule_work(&tgt->sess_work);
1707
1708         return 0;
1709 }
1710
1711 /*
1712  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1713  */
1714 static void qlt_send_notify_ack(struct qla_qpair *qpair,
1715         struct imm_ntfy_from_isp *ntfy,
1716         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1717         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1718 {
1719         struct scsi_qla_host *vha = qpair->vha;
1720         struct qla_hw_data *ha = vha->hw;
1721         request_t *pkt;
1722         struct nack_to_isp *nack;
1723
1724         if (!ha->flags.fw_started)
1725                 return;
1726
1727         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1728
1729         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
1730         if (!pkt) {
1731                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1732                     "qla_target(%d): %s failed: unable to allocate "
1733                     "request packet\n", vha->vp_idx, __func__);
1734                 return;
1735         }
1736
1737         if (vha->vha_tgt.qla_tgt != NULL)
1738                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1739
1740         pkt->entry_type = NOTIFY_ACK_TYPE;
1741         pkt->entry_count = 1;
1742
1743         nack = (struct nack_to_isp *)pkt;
1744         nack->ox_id = ntfy->ox_id;
1745
1746         nack->u.isp24.handle = QLA_TGT_SKIP_HANDLE;
1747         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1748         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1749                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1750                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
1751         }
1752         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1753         nack->u.isp24.status = ntfy->u.isp24.status;
1754         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1755         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1756         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1757         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1758         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1759         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1760         nack->u.isp24.srr_reject_code = srr_reject_code;
1761         nack->u.isp24.srr_reject_code_expl = srr_explan;
1762         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1763
1764         /* TODO qualify this with EDIF enable */
1765         if (ntfy->u.isp24.status_subcode == ELS_PLOGI &&
1766             (le16_to_cpu(ntfy->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
1767                 nack->u.isp24.flags |= cpu_to_le16(NOTIFY_ACK_FLAGS_FCSP);
1768         }
1769
1770         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1771             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1772             vha->vp_idx, nack->u.isp24.status);
1773
1774         /* Memory Barrier */
1775         wmb();
1776         qla2x00_start_iocbs(vha, qpair->req);
1777 }
1778
1779 static int qlt_build_abts_resp_iocb(struct qla_tgt_mgmt_cmd *mcmd)
1780 {
1781         struct scsi_qla_host *vha = mcmd->vha;
1782         struct qla_hw_data *ha = vha->hw;
1783         struct abts_resp_to_24xx *resp;
1784         __le32 f_ctl;
1785         uint32_t h;
1786         uint8_t *p;
1787         int rc;
1788         struct abts_recv_from_24xx *abts = &mcmd->orig_iocb.abts;
1789         struct qla_qpair *qpair = mcmd->qpair;
1790
1791         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1792             "Sending task mgmt ABTS response (ha=%p, status=%x)\n",
1793             ha, mcmd->fc_tm_rsp);
1794
1795         rc = qlt_check_reserve_free_req(qpair, 1);
1796         if (rc) {
1797                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1798                     "qla_target(%d): %s failed: unable to allocate request packet\n",
1799                     vha->vp_idx, __func__);
1800                 return -EAGAIN;
1801         }
1802
1803         resp = (struct abts_resp_to_24xx *)qpair->req->ring_ptr;
1804         memset(resp, 0, sizeof(*resp));
1805
1806         h = qlt_make_handle(qpair);
1807         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1808                 /*
1809                  * CTIO type 7 from the firmware doesn't provide a way to
1810                  * know the initiator's LOOP ID, hence we can't find
1811                  * the session and, so, the command.
1812                  */
1813                 return -EAGAIN;
1814         } else {
1815                 qpair->req->outstanding_cmds[h] = (srb_t *)mcmd;
1816         }
1817
1818         resp->handle = make_handle(qpair->req->id, h);
1819         resp->entry_type = ABTS_RESP_24XX;
1820         resp->entry_count = 1;
1821         resp->nport_handle = abts->nport_handle;
1822         resp->vp_index = vha->vp_idx;
1823         resp->sof_type = abts->sof_type;
1824         resp->exchange_address = abts->exchange_address;
1825         resp->fcp_hdr_le = abts->fcp_hdr_le;
1826         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1827             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1828             F_CTL_SEQ_INITIATIVE);
1829         p = (uint8_t *)&f_ctl;
1830         resp->fcp_hdr_le.f_ctl[0] = *p++;
1831         resp->fcp_hdr_le.f_ctl[1] = *p++;
1832         resp->fcp_hdr_le.f_ctl[2] = *p;
1833
1834         resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1835         resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1836
1837         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1838         if (mcmd->fc_tm_rsp == FCP_TMF_CMPL) {
1839                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1840                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1841                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1842                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1843                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1844                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1845         } else {
1846                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1847                 resp->payload.ba_rjt.reason_code =
1848                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1849                 /* Other bytes are zero */
1850         }
1851
1852         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1853
1854         /* Memory Barrier */
1855         wmb();
1856         if (qpair->reqq_start_iocbs)
1857                 qpair->reqq_start_iocbs(qpair);
1858         else
1859                 qla2x00_start_iocbs(vha, qpair->req);
1860
1861         return rc;
1862 }
1863
1864 /*
1865  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1866  */
1867 static void qlt_24xx_send_abts_resp(struct qla_qpair *qpair,
1868         struct abts_recv_from_24xx *abts, uint32_t status,
1869         bool ids_reversed)
1870 {
1871         struct scsi_qla_host *vha = qpair->vha;
1872         struct qla_hw_data *ha = vha->hw;
1873         struct abts_resp_to_24xx *resp;
1874         __le32 f_ctl;
1875         uint8_t *p;
1876
1877         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1878             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1879             ha, abts, status);
1880
1881         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(qpair,
1882             NULL);
1883         if (!resp) {
1884                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1885                     "qla_target(%d): %s failed: unable to allocate "
1886                     "request packet", vha->vp_idx, __func__);
1887                 return;
1888         }
1889
1890         resp->entry_type = ABTS_RESP_24XX;
1891         resp->handle = QLA_TGT_SKIP_HANDLE;
1892         resp->entry_count = 1;
1893         resp->nport_handle = abts->nport_handle;
1894         resp->vp_index = vha->vp_idx;
1895         resp->sof_type = abts->sof_type;
1896         resp->exchange_address = abts->exchange_address;
1897         resp->fcp_hdr_le = abts->fcp_hdr_le;
1898         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1899             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1900             F_CTL_SEQ_INITIATIVE);
1901         p = (uint8_t *)&f_ctl;
1902         resp->fcp_hdr_le.f_ctl[0] = *p++;
1903         resp->fcp_hdr_le.f_ctl[1] = *p++;
1904         resp->fcp_hdr_le.f_ctl[2] = *p;
1905         if (ids_reversed) {
1906                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.d_id;
1907                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.s_id;
1908         } else {
1909                 resp->fcp_hdr_le.d_id = abts->fcp_hdr_le.s_id;
1910                 resp->fcp_hdr_le.s_id = abts->fcp_hdr_le.d_id;
1911         }
1912         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1913         if (status == FCP_TMF_CMPL) {
1914                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1915                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1916                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1917                 resp->payload.ba_acct.high_seq_cnt = cpu_to_le16(0xFFFF);
1918                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1919                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1920         } else {
1921                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1922                 resp->payload.ba_rjt.reason_code =
1923                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1924                 /* Other bytes are zero */
1925         }
1926
1927         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1928
1929         /* Memory Barrier */
1930         wmb();
1931         if (qpair->reqq_start_iocbs)
1932                 qpair->reqq_start_iocbs(qpair);
1933         else
1934                 qla2x00_start_iocbs(vha, qpair->req);
1935 }
1936
1937 /*
1938  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1939  */
1940 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1941     struct qla_qpair *qpair, response_t *pkt, struct qla_tgt_mgmt_cmd *mcmd)
1942 {
1943         struct ctio7_to_24xx *ctio;
1944         u16 tmp;
1945         struct abts_recv_from_24xx *entry;
1946
1947         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(qpair, NULL);
1948         if (ctio == NULL) {
1949                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1950                     "qla_target(%d): %s failed: unable to allocate "
1951                     "request packet\n", vha->vp_idx, __func__);
1952                 return;
1953         }
1954
1955         if (mcmd)
1956                 /* abts from remote port */
1957                 entry = &mcmd->orig_iocb.abts;
1958         else
1959                 /* abts from this driver.  */
1960                 entry = (struct abts_recv_from_24xx *)pkt;
1961
1962         /*
1963          * We've got on entrance firmware's response on by us generated
1964          * ABTS response. So, in it ID fields are reversed.
1965          */
1966
1967         ctio->entry_type = CTIO_TYPE7;
1968         ctio->entry_count = 1;
1969         ctio->nport_handle = entry->nport_handle;
1970         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1971         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1972         ctio->vp_index = vha->vp_idx;
1973         ctio->exchange_addr = entry->exchange_addr_to_abort;
1974         tmp = (CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_TERMINATE);
1975
1976         if (mcmd) {
1977                 ctio->initiator_id = entry->fcp_hdr_le.s_id;
1978
1979                 if (mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID)
1980                         tmp |= (mcmd->abort_io_attr << 9);
1981                 else if (qpair->retry_term_cnt & 1)
1982                         tmp |= (0x4 << 9);
1983         } else {
1984                 ctio->initiator_id = entry->fcp_hdr_le.d_id;
1985
1986                 if (qpair->retry_term_cnt & 1)
1987                         tmp |= (0x4 << 9);
1988         }
1989         ctio->u.status1.flags = cpu_to_le16(tmp);
1990         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1991
1992         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1993             "Sending retry TERM EXCH CTIO7 flags %04xh oxid %04xh attr valid %x\n",
1994             le16_to_cpu(ctio->u.status1.flags),
1995             le16_to_cpu(ctio->u.status1.ox_id),
1996             (mcmd && mcmd->flags & QLA24XX_MGMT_ABORT_IO_ATTR_VALID) ? 1 : 0);
1997
1998         /* Memory Barrier */
1999         wmb();
2000         if (qpair->reqq_start_iocbs)
2001                 qpair->reqq_start_iocbs(qpair);
2002         else
2003                 qla2x00_start_iocbs(vha, qpair->req);
2004
2005         if (mcmd)
2006                 qlt_build_abts_resp_iocb(mcmd);
2007         else
2008                 qlt_24xx_send_abts_resp(qpair,
2009                     (struct abts_recv_from_24xx *)entry, FCP_TMF_CMPL, true);
2010
2011 }
2012
2013 /* drop cmds for the given lun
2014  * XXX only looks for cmds on the port through which lun reset was recieved
2015  * XXX does not go through the list of other port (which may have cmds
2016  *     for the same lun)
2017  */
2018 static void abort_cmds_for_lun(struct scsi_qla_host *vha, u64 lun, be_id_t s_id)
2019 {
2020         struct qla_tgt_sess_op *op;
2021         struct qla_tgt_cmd *cmd;
2022         uint32_t key;
2023         unsigned long flags;
2024
2025         key = sid_to_key(s_id);
2026         spin_lock_irqsave(&vha->cmd_list_lock, flags);
2027         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
2028                 uint32_t op_key;
2029                 u64 op_lun;
2030
2031                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
2032                 op_lun = scsilun_to_int(
2033                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
2034                 if (op_key == key && op_lun == lun)
2035                         op->aborted = true;
2036         }
2037
2038         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
2039                 uint32_t cmd_key;
2040                 u64 cmd_lun;
2041
2042                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
2043                 cmd_lun = scsilun_to_int(
2044                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
2045                 if (cmd_key == key && cmd_lun == lun)
2046                         cmd->aborted = 1;
2047         }
2048         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
2049 }
2050
2051 static struct qla_qpair_hint *qlt_find_qphint(struct scsi_qla_host *vha,
2052     uint64_t unpacked_lun)
2053 {
2054         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2055         struct qla_qpair_hint *h = NULL;
2056
2057         if (vha->flags.qpairs_available) {
2058                 h = btree_lookup64(&tgt->lun_qpair_map, unpacked_lun);
2059                 if (!h)
2060                         h = &tgt->qphints[0];
2061         } else {
2062                 h = &tgt->qphints[0];
2063         }
2064
2065         return h;
2066 }
2067
2068 static void qlt_do_tmr_work(struct work_struct *work)
2069 {
2070         struct qla_tgt_mgmt_cmd *mcmd =
2071                 container_of(work, struct qla_tgt_mgmt_cmd, work);
2072         struct qla_hw_data *ha = mcmd->vha->hw;
2073         int rc;
2074         uint32_t tag;
2075         unsigned long flags;
2076
2077         switch (mcmd->tmr_func) {
2078         case QLA_TGT_ABTS:
2079                 tag = le32_to_cpu(mcmd->orig_iocb.abts.exchange_addr_to_abort);
2080                 break;
2081         default:
2082                 tag = 0;
2083                 break;
2084         }
2085
2086         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, mcmd->unpacked_lun,
2087             mcmd->tmr_func, tag);
2088
2089         if (rc != 0) {
2090                 spin_lock_irqsave(mcmd->qpair->qp_lock_ptr, flags);
2091                 switch (mcmd->tmr_func) {
2092                 case QLA_TGT_ABTS:
2093                         mcmd->fc_tm_rsp = FCP_TMF_REJECTED;
2094                         qlt_build_abts_resp_iocb(mcmd);
2095                         break;
2096                 case QLA_TGT_LUN_RESET:
2097                 case QLA_TGT_CLEAR_TS:
2098                 case QLA_TGT_ABORT_TS:
2099                 case QLA_TGT_CLEAR_ACA:
2100                 case QLA_TGT_TARGET_RESET:
2101                         qlt_send_busy(mcmd->qpair, &mcmd->orig_iocb.atio,
2102                             qla_sam_status);
2103                         break;
2104
2105                 case QLA_TGT_ABORT_ALL:
2106                 case QLA_TGT_NEXUS_LOSS_SESS:
2107                 case QLA_TGT_NEXUS_LOSS:
2108                         qlt_send_notify_ack(mcmd->qpair,
2109                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2110                         break;
2111                 }
2112                 spin_unlock_irqrestore(mcmd->qpair->qp_lock_ptr, flags);
2113
2114                 ql_dbg(ql_dbg_tgt_mgt, mcmd->vha, 0xf052,
2115                     "qla_target(%d):  tgt_ops->handle_tmr() failed: %d\n",
2116                     mcmd->vha->vp_idx, rc);
2117                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2118         }
2119 }
2120
2121 /* ha->hardware_lock supposed to be held on entry */
2122 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2123         struct abts_recv_from_24xx *abts, struct fc_port *sess)
2124 {
2125         struct qla_hw_data *ha = vha->hw;
2126         struct qla_tgt_mgmt_cmd *mcmd;
2127         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
2128         struct qla_tgt_cmd *abort_cmd;
2129
2130         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
2131             "qla_target(%d): task abort (tag=%d)\n",
2132             vha->vp_idx, abts->exchange_addr_to_abort);
2133
2134         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2135         if (mcmd == NULL) {
2136                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
2137                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
2138                     vha->vp_idx, __func__);
2139                 return -ENOMEM;
2140         }
2141         memset(mcmd, 0, sizeof(*mcmd));
2142         mcmd->cmd_type = TYPE_TGT_TMCMD;
2143         mcmd->sess = sess;
2144         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
2145         mcmd->reset_count = ha->base_qpair->chip_reset;
2146         mcmd->tmr_func = QLA_TGT_ABTS;
2147         mcmd->qpair = h->qpair;
2148         mcmd->vha = vha;
2149
2150         /*
2151          * LUN is looked up by target-core internally based on the passed
2152          * abts->exchange_addr_to_abort tag.
2153          */
2154         mcmd->se_cmd.cpuid = h->cpuid;
2155
2156         abort_cmd = ha->tgt.tgt_ops->find_cmd_by_tag(sess,
2157                                 le32_to_cpu(abts->exchange_addr_to_abort));
2158         if (!abort_cmd)
2159                 return -EIO;
2160         mcmd->unpacked_lun = abort_cmd->se_cmd.orig_fe_lun;
2161
2162         if (abort_cmd->qpair) {
2163                 mcmd->qpair = abort_cmd->qpair;
2164                 mcmd->se_cmd.cpuid = abort_cmd->se_cmd.cpuid;
2165                 mcmd->abort_io_attr = abort_cmd->atio.u.isp24.attr;
2166                 mcmd->flags = QLA24XX_MGMT_ABORT_IO_ATTR_VALID;
2167         }
2168
2169         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
2170         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq, &mcmd->work);
2171
2172         return 0;
2173 }
2174
2175 /*
2176  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2177  */
2178 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
2179         struct abts_recv_from_24xx *abts)
2180 {
2181         struct qla_hw_data *ha = vha->hw;
2182         struct fc_port *sess;
2183         uint32_t tag = le32_to_cpu(abts->exchange_addr_to_abort);
2184         be_id_t s_id;
2185         int rc;
2186         unsigned long flags;
2187
2188         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
2189                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
2190                     "qla_target(%d): ABTS: Abort Sequence not "
2191                     "supported\n", vha->vp_idx);
2192                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2193                     false);
2194                 return;
2195         }
2196
2197         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
2198                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
2199                     "qla_target(%d): ABTS: Unknown Exchange "
2200                     "Address received\n", vha->vp_idx);
2201                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2202                     false);
2203                 return;
2204         }
2205
2206         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
2207             "qla_target(%d): task abort (s_id=%x:%x:%x, "
2208             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id.domain,
2209             abts->fcp_hdr_le.s_id.area, abts->fcp_hdr_le.s_id.al_pa, tag,
2210             le32_to_cpu(abts->fcp_hdr_le.parameter));
2211
2212         s_id = le_id_to_be(abts->fcp_hdr_le.s_id);
2213
2214         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
2215         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
2216         if (!sess) {
2217                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
2218                     "qla_target(%d): task abort for non-existent session\n",
2219                     vha->vp_idx);
2220                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2221
2222                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2223                             false);
2224                 return;
2225         }
2226         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
2227
2228
2229         if (sess->deleted) {
2230                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2231                     false);
2232                 return;
2233         }
2234
2235         rc = __qlt_24xx_handle_abts(vha, abts, sess);
2236         if (rc != 0) {
2237                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
2238                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
2239                     vha->vp_idx, rc);
2240                 qlt_24xx_send_abts_resp(ha->base_qpair, abts, FCP_TMF_REJECTED,
2241                     false);
2242                 return;
2243         }
2244 }
2245
2246 /*
2247  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2248  */
2249 static void qlt_24xx_send_task_mgmt_ctio(struct qla_qpair *qpair,
2250         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
2251 {
2252         struct scsi_qla_host *ha = mcmd->vha;
2253         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
2254         struct ctio7_to_24xx *ctio;
2255         uint16_t temp;
2256
2257         ql_dbg(ql_dbg_tgt, ha, 0xe008,
2258             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
2259             ha, atio, resp_code);
2260
2261
2262         ctio = (struct ctio7_to_24xx *)__qla2x00_alloc_iocbs(qpair, NULL);
2263         if (ctio == NULL) {
2264                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
2265                     "qla_target(%d): %s failed: unable to allocate "
2266                     "request packet\n", ha->vp_idx, __func__);
2267                 return;
2268         }
2269
2270         ctio->entry_type = CTIO_TYPE7;
2271         ctio->entry_count = 1;
2272         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2273         ctio->nport_handle = cpu_to_le16(mcmd->sess->loop_id);
2274         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2275         ctio->vp_index = ha->vp_idx;
2276         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2277         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2278         temp = (atio->u.isp24.attr << 9)|
2279                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2280         ctio->u.status1.flags = cpu_to_le16(temp);
2281         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2282         ctio->u.status1.ox_id = cpu_to_le16(temp);
2283         ctio->u.status1.scsi_status =
2284             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
2285         ctio->u.status1.response_len = cpu_to_le16(8);
2286         ctio->u.status1.sense_data[0] = resp_code;
2287
2288         /* Memory Barrier */
2289         wmb();
2290         if (qpair->reqq_start_iocbs)
2291                 qpair->reqq_start_iocbs(qpair);
2292         else
2293                 qla2x00_start_iocbs(ha, qpair->req);
2294 }
2295
2296 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
2297 {
2298         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2299 }
2300 EXPORT_SYMBOL(qlt_free_mcmd);
2301
2302 /*
2303  * ha->hardware_lock supposed to be held on entry. Might drop it, then
2304  * reacquire
2305  */
2306 void qlt_send_resp_ctio(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
2307     uint8_t scsi_status, uint8_t sense_key, uint8_t asc, uint8_t ascq)
2308 {
2309         struct atio_from_isp *atio = &cmd->atio;
2310         struct ctio7_to_24xx *ctio;
2311         uint16_t temp;
2312         struct scsi_qla_host *vha = cmd->vha;
2313
2314         ql_dbg(ql_dbg_tgt_dif, vha, 0x3066,
2315             "Sending response CTIO7 (vha=%p, atio=%p, scsi_status=%02x, "
2316             "sense_key=%02x, asc=%02x, ascq=%02x",
2317             vha, atio, scsi_status, sense_key, asc, ascq);
2318
2319         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
2320         if (!ctio) {
2321                 ql_dbg(ql_dbg_async, vha, 0x3067,
2322                     "qla2x00t(%ld): %s failed: unable to allocate request packet",
2323                     vha->host_no, __func__);
2324                 goto out;
2325         }
2326
2327         ctio->entry_type = CTIO_TYPE7;
2328         ctio->entry_count = 1;
2329         ctio->handle = QLA_TGT_SKIP_HANDLE;
2330         ctio->nport_handle = cpu_to_le16(cmd->sess->loop_id);
2331         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2332         ctio->vp_index = vha->vp_idx;
2333         ctio->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2334         ctio->exchange_addr = atio->u.isp24.exchange_addr;
2335         temp = (atio->u.isp24.attr << 9) |
2336             CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS;
2337         ctio->u.status1.flags = cpu_to_le16(temp);
2338         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2339         ctio->u.status1.ox_id = cpu_to_le16(temp);
2340         ctio->u.status1.scsi_status =
2341             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID | scsi_status);
2342         ctio->u.status1.response_len = cpu_to_le16(18);
2343         ctio->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
2344
2345         if (ctio->u.status1.residual != 0)
2346                 ctio->u.status1.scsi_status |=
2347                     cpu_to_le16(SS_RESIDUAL_UNDER);
2348
2349         /* Fixed format sense data. */
2350         ctio->u.status1.sense_data[0] = 0x70;
2351         ctio->u.status1.sense_data[2] = sense_key;
2352         /* Additional sense length */
2353         ctio->u.status1.sense_data[7] = 0xa;
2354         /* ASC and ASCQ */
2355         ctio->u.status1.sense_data[12] = asc;
2356         ctio->u.status1.sense_data[13] = ascq;
2357
2358         /* Memory Barrier */
2359         wmb();
2360
2361         if (qpair->reqq_start_iocbs)
2362                 qpair->reqq_start_iocbs(qpair);
2363         else
2364                 qla2x00_start_iocbs(vha, qpair->req);
2365
2366 out:
2367         return;
2368 }
2369
2370 /* callback from target fabric module code */
2371 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
2372 {
2373         struct scsi_qla_host *vha = mcmd->sess->vha;
2374         struct qla_hw_data *ha = vha->hw;
2375         unsigned long flags;
2376         struct qla_qpair *qpair = mcmd->qpair;
2377         bool free_mcmd = true;
2378
2379         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
2380             "TM response mcmd (%p) status %#x state %#x",
2381             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
2382
2383         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
2384
2385         if (!vha->flags.online || mcmd->reset_count != qpair->chip_reset) {
2386                 /*
2387                  * Either the port is not online or this request was from
2388                  * previous life, just abort the processing.
2389                  */
2390                 ql_dbg(ql_dbg_async, vha, 0xe100,
2391                         "RESET-TMR online/active/old-count/new-count = %d/%d/%d/%d.\n",
2392                         vha->flags.online, qla2x00_reset_active(vha),
2393                         mcmd->reset_count, qpair->chip_reset);
2394                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2395                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2396                 return;
2397         }
2398
2399         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK) {
2400                 switch (mcmd->orig_iocb.imm_ntfy.u.isp24.status_subcode) {
2401                 case ELS_LOGO:
2402                 case ELS_PRLO:
2403                 case ELS_TPRLO:
2404                         ql_dbg(ql_dbg_disc, vha, 0x2106,
2405                             "TM response logo %8phC status %#x state %#x",
2406                             mcmd->sess->port_name, mcmd->fc_tm_rsp,
2407                             mcmd->flags);
2408                         qlt_schedule_sess_for_deletion(mcmd->sess);
2409                         break;
2410                 default:
2411                         qlt_send_notify_ack(vha->hw->base_qpair,
2412                             &mcmd->orig_iocb.imm_ntfy, 0, 0, 0, 0, 0, 0);
2413                         break;
2414                 }
2415         } else {
2416                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX) {
2417                         qlt_build_abts_resp_iocb(mcmd);
2418                         free_mcmd = false;
2419                 } else
2420                         qlt_24xx_send_task_mgmt_ctio(qpair, mcmd,
2421                             mcmd->fc_tm_rsp);
2422         }
2423         /*
2424          * Make the callback for ->free_mcmd() to queue_work() and invoke
2425          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
2426          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
2427          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
2428          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
2429          * qlt_xmit_tm_rsp() returns here..
2430          */
2431         if (free_mcmd)
2432                 ha->tgt.tgt_ops->free_mcmd(mcmd);
2433
2434         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
2435 }
2436 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
2437
2438 /* No locks */
2439 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
2440 {
2441         struct qla_tgt_cmd *cmd = prm->cmd;
2442
2443         BUG_ON(cmd->sg_cnt == 0);
2444
2445         prm->sg = (struct scatterlist *)cmd->sg;
2446         prm->seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev, cmd->sg,
2447             cmd->sg_cnt, cmd->dma_data_direction);
2448         if (unlikely(prm->seg_cnt == 0))
2449                 goto out_err;
2450
2451         prm->cmd->sg_mapped = 1;
2452
2453         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
2454                 /*
2455                  * If greater than four sg entries then we need to allocate
2456                  * the continuation entries
2457                  */
2458                 if (prm->seg_cnt > QLA_TGT_DATASEGS_PER_CMD_24XX)
2459                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
2460                         QLA_TGT_DATASEGS_PER_CMD_24XX,
2461                         QLA_TGT_DATASEGS_PER_CONT_24XX);
2462         } else {
2463                 /* DIF */
2464                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2465                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2466                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
2467                         prm->tot_dsds = prm->seg_cnt;
2468                 } else
2469                         prm->tot_dsds = prm->seg_cnt;
2470
2471                 if (cmd->prot_sg_cnt) {
2472                         prm->prot_sg      = cmd->prot_sg;
2473                         prm->prot_seg_cnt = dma_map_sg(&cmd->qpair->pdev->dev,
2474                                 cmd->prot_sg, cmd->prot_sg_cnt,
2475                                 cmd->dma_data_direction);
2476                         if (unlikely(prm->prot_seg_cnt == 0))
2477                                 goto out_err;
2478
2479                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
2480                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
2481                                 /* Dif Bundling not support here */
2482                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
2483                                                                 cmd->blk_sz);
2484                                 prm->tot_dsds += prm->prot_seg_cnt;
2485                         } else
2486                                 prm->tot_dsds += prm->prot_seg_cnt;
2487                 }
2488         }
2489
2490         return 0;
2491
2492 out_err:
2493         ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe04d,
2494             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
2495             0, prm->cmd->sg_cnt);
2496         return -1;
2497 }
2498
2499 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2500 {
2501         struct qla_hw_data *ha;
2502         struct qla_qpair *qpair;
2503
2504         if (!cmd->sg_mapped)
2505                 return;
2506
2507         qpair = cmd->qpair;
2508
2509         dma_unmap_sg(&qpair->pdev->dev, cmd->sg, cmd->sg_cnt,
2510             cmd->dma_data_direction);
2511         cmd->sg_mapped = 0;
2512
2513         if (cmd->prot_sg_cnt)
2514                 dma_unmap_sg(&qpair->pdev->dev, cmd->prot_sg, cmd->prot_sg_cnt,
2515                         cmd->dma_data_direction);
2516
2517         if (!cmd->ctx)
2518                 return;
2519         ha = vha->hw;
2520         if (cmd->ctx_dsd_alloced)
2521                 qla2x00_clean_dsd_pool(ha, cmd->ctx);
2522
2523         dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
2524 }
2525
2526 static int qlt_check_reserve_free_req(struct qla_qpair *qpair,
2527         uint32_t req_cnt)
2528 {
2529         uint32_t cnt;
2530         struct req_que *req = qpair->req;
2531
2532         if (req->cnt < (req_cnt + 2)) {
2533                 cnt = (uint16_t)(qpair->use_shadow_reg ? *req->out_ptr :
2534                     rd_reg_dword_relaxed(req->req_q_out));
2535
2536                 if  (req->ring_index < cnt)
2537                         req->cnt = cnt - req->ring_index;
2538                 else
2539                         req->cnt = req->length - (req->ring_index - cnt);
2540
2541                 if (unlikely(req->cnt < (req_cnt + 2)))
2542                         return -EAGAIN;
2543         }
2544
2545         req->cnt -= req_cnt;
2546
2547         return 0;
2548 }
2549
2550 /*
2551  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2552  */
2553 static inline void *qlt_get_req_pkt(struct req_que *req)
2554 {
2555         /* Adjust ring index. */
2556         req->ring_index++;
2557         if (req->ring_index == req->length) {
2558                 req->ring_index = 0;
2559                 req->ring_ptr = req->ring;
2560         } else {
2561                 req->ring_ptr++;
2562         }
2563         return (cont_entry_t *)req->ring_ptr;
2564 }
2565
2566 /* ha->hardware_lock supposed to be held on entry */
2567 static inline uint32_t qlt_make_handle(struct qla_qpair *qpair)
2568 {
2569         uint32_t h;
2570         int index;
2571         uint8_t found = 0;
2572         struct req_que *req = qpair->req;
2573
2574         h = req->current_outstanding_cmd;
2575
2576         for (index = 1; index < req->num_outstanding_cmds; index++) {
2577                 h++;
2578                 if (h == req->num_outstanding_cmds)
2579                         h = 1;
2580
2581                 if (h == QLA_TGT_SKIP_HANDLE)
2582                         continue;
2583
2584                 if (!req->outstanding_cmds[h]) {
2585                         found = 1;
2586                         break;
2587                 }
2588         }
2589
2590         if (found) {
2591                 req->current_outstanding_cmd = h;
2592         } else {
2593                 ql_dbg(ql_dbg_io, qpair->vha, 0x305b,
2594                     "qla_target(%d): Ran out of empty cmd slots\n",
2595                     qpair->vha->vp_idx);
2596                 h = QLA_TGT_NULL_HANDLE;
2597         }
2598
2599         return h;
2600 }
2601
2602 /* ha->hardware_lock supposed to be held on entry */
2603 static int qlt_24xx_build_ctio_pkt(struct qla_qpair *qpair,
2604         struct qla_tgt_prm *prm)
2605 {
2606         uint32_t h;
2607         struct ctio7_to_24xx *pkt;
2608         struct atio_from_isp *atio = &prm->cmd->atio;
2609         uint16_t temp;
2610         struct qla_tgt_cmd      *cmd = prm->cmd;
2611
2612         pkt = (struct ctio7_to_24xx *)qpair->req->ring_ptr;
2613         prm->pkt = pkt;
2614         memset(pkt, 0, sizeof(*pkt));
2615
2616         pkt->entry_type = CTIO_TYPE7;
2617         pkt->entry_count = (uint8_t)prm->req_cnt;
2618         pkt->vp_index = prm->cmd->vp_idx;
2619
2620         h = qlt_make_handle(qpair);
2621         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2622                 /*
2623                  * CTIO type 7 from the firmware doesn't provide a way to
2624                  * know the initiator's LOOP ID, hence we can't find
2625                  * the session and, so, the command.
2626                  */
2627                 return -EAGAIN;
2628         } else
2629                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
2630
2631         pkt->handle = make_handle(qpair->req->id, h);
2632         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
2633         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
2634         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2635         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
2636         pkt->exchange_addr = atio->u.isp24.exchange_addr;
2637         temp = atio->u.isp24.attr << 9;
2638         pkt->u.status0.flags |= cpu_to_le16(temp);
2639         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2640         pkt->u.status0.ox_id = cpu_to_le16(temp);
2641         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
2642
2643         if (cmd->edif) {
2644                 if (cmd->dma_data_direction == DMA_TO_DEVICE)
2645                         prm->cmd->sess->edif.rx_bytes += cmd->bufflen;
2646                 if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2647                         prm->cmd->sess->edif.tx_bytes += cmd->bufflen;
2648
2649                 pkt->u.status0.edif_flags |= EF_EN_EDIF;
2650         }
2651
2652         return 0;
2653 }
2654
2655 /*
2656  * ha->hardware_lock supposed to be held on entry. We have already made sure
2657  * that there is sufficient amount of request entries to not drop it.
2658  */
2659 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
2660 {
2661         int cnt;
2662         struct dsd64 *cur_dsd;
2663
2664         /* Build continuation packets */
2665         while (prm->seg_cnt > 0) {
2666                 cont_a64_entry_t *cont_pkt64 =
2667                         (cont_a64_entry_t *)qlt_get_req_pkt(
2668                            prm->cmd->qpair->req);
2669
2670                 /*
2671                  * Make sure that from cont_pkt64 none of
2672                  * 64-bit specific fields used for 32-bit
2673                  * addressing. Cast to (cont_entry_t *) for
2674                  * that.
2675                  */
2676
2677                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
2678
2679                 cont_pkt64->entry_count = 1;
2680                 cont_pkt64->sys_define = 0;
2681
2682                 cont_pkt64->entry_type = CONTINUE_A64_TYPE;
2683                 cur_dsd = cont_pkt64->dsd;
2684
2685                 /* Load continuation entry data segments */
2686                 for (cnt = 0;
2687                     cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
2688                     cnt++, prm->seg_cnt--) {
2689                         append_dsd64(&cur_dsd, prm->sg);
2690                         prm->sg = sg_next(prm->sg);
2691                 }
2692         }
2693 }
2694
2695 /*
2696  * ha->hardware_lock supposed to be held on entry. We have already made sure
2697  * that there is sufficient amount of request entries to not drop it.
2698  */
2699 static void qlt_load_data_segments(struct qla_tgt_prm *prm)
2700 {
2701         int cnt;
2702         struct dsd64 *cur_dsd;
2703         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
2704
2705         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
2706
2707         /* Setup packet address segment pointer */
2708         cur_dsd = &pkt24->u.status0.dsd;
2709
2710         /* Set total data segment count */
2711         if (prm->seg_cnt)
2712                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
2713
2714         if (prm->seg_cnt == 0) {
2715                 /* No data transfer */
2716                 cur_dsd->address = 0;
2717                 cur_dsd->length = 0;
2718                 return;
2719         }
2720
2721         /* If scatter gather */
2722
2723         /* Load command entry data segments */
2724         for (cnt = 0;
2725             (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
2726             cnt++, prm->seg_cnt--) {
2727                 append_dsd64(&cur_dsd, prm->sg);
2728                 prm->sg = sg_next(prm->sg);
2729         }
2730
2731         qlt_load_cont_data_segments(prm);
2732 }
2733
2734 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
2735 {
2736         return cmd->bufflen > 0;
2737 }
2738
2739 static void qlt_print_dif_err(struct qla_tgt_prm *prm)
2740 {
2741         struct qla_tgt_cmd *cmd;
2742         struct scsi_qla_host *vha;
2743
2744         /* asc 0x10=dif error */
2745         if (prm->sense_buffer && (prm->sense_buffer[12] == 0x10)) {
2746                 cmd = prm->cmd;
2747                 vha = cmd->vha;
2748                 /* ASCQ */
2749                 switch (prm->sense_buffer[13]) {
2750                 case 1:
2751                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00b,
2752                             "BE detected Guard TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2753                             "se_cmd=%p tag[%x]",
2754                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2755                             cmd->atio.u.isp24.exchange_addr);
2756                         break;
2757                 case 2:
2758                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00c,
2759                             "BE detected APP TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2760                             "se_cmd=%p tag[%x]",
2761                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2762                             cmd->atio.u.isp24.exchange_addr);
2763                         break;
2764                 case 3:
2765                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe00f,
2766                             "BE detected REF TAG ERR: lba[0x%llx|%lld] len[0x%x] "
2767                             "se_cmd=%p tag[%x]",
2768                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2769                             cmd->atio.u.isp24.exchange_addr);
2770                         break;
2771                 default:
2772                         ql_dbg(ql_dbg_tgt_dif, vha, 0xe010,
2773                             "BE detected Dif ERR: lba[%llx|%lld] len[%x] "
2774                             "se_cmd=%p tag[%x]",
2775                             cmd->lba, cmd->lba, cmd->num_blks, &cmd->se_cmd,
2776                             cmd->atio.u.isp24.exchange_addr);
2777                         break;
2778                 }
2779                 ql_dump_buffer(ql_dbg_tgt_dif, vha, 0xe011, cmd->cdb, 16);
2780         }
2781 }
2782
2783 /*
2784  * Called without ha->hardware_lock held
2785  */
2786 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
2787         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
2788         uint32_t *full_req_cnt)
2789 {
2790         struct se_cmd *se_cmd = &cmd->se_cmd;
2791         struct qla_qpair *qpair = cmd->qpair;
2792
2793         prm->cmd = cmd;
2794         prm->tgt = cmd->tgt;
2795         prm->pkt = NULL;
2796         prm->rq_result = scsi_status;
2797         prm->sense_buffer = &cmd->sense_buffer[0];
2798         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
2799         prm->sg = NULL;
2800         prm->seg_cnt = -1;
2801         prm->req_cnt = 1;
2802         prm->residual = 0;
2803         prm->add_status_pkt = 0;
2804         prm->prot_sg = NULL;
2805         prm->prot_seg_cnt = 0;
2806         prm->tot_dsds = 0;
2807
2808         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
2809                 if  (qlt_pci_map_calc_cnt(prm) != 0)
2810                         return -EAGAIN;
2811         }
2812
2813         *full_req_cnt = prm->req_cnt;
2814
2815         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
2816                 prm->residual = se_cmd->residual_count;
2817                 ql_dbg_qp(ql_dbg_io + ql_dbg_verbose, qpair, 0x305c,
2818                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2819                        prm->residual, se_cmd->tag,
2820                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
2821                        cmd->bufflen, prm->rq_result);
2822                 prm->rq_result |= SS_RESIDUAL_UNDER;
2823         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
2824                 prm->residual = se_cmd->residual_count;
2825                 ql_dbg_qp(ql_dbg_io, qpair, 0x305d,
2826                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
2827                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
2828                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
2829                 prm->rq_result |= SS_RESIDUAL_OVER;
2830         }
2831
2832         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2833                 /*
2834                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
2835                  * ignored in *xmit_response() below
2836                  */
2837                 if (qlt_has_data(cmd)) {
2838                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
2839                             (IS_FWI2_CAPABLE(cmd->vha->hw) &&
2840                             (prm->rq_result != 0))) {
2841                                 prm->add_status_pkt = 1;
2842                                 (*full_req_cnt)++;
2843                         }
2844                 }
2845         }
2846
2847         return 0;
2848 }
2849
2850 static inline int qlt_need_explicit_conf(struct qla_tgt_cmd *cmd,
2851     int sending_sense)
2852 {
2853         if (cmd->qpair->enable_class_2)
2854                 return 0;
2855
2856         if (sending_sense)
2857                 return cmd->conf_compl_supported;
2858         else
2859                 return cmd->qpair->enable_explicit_conf &&
2860                     cmd->conf_compl_supported;
2861 }
2862
2863 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2864         struct qla_tgt_prm *prm)
2865 {
2866         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2867             (uint32_t)sizeof(ctio->u.status1.sense_data));
2868         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2869         if (qlt_need_explicit_conf(prm->cmd, 0)) {
2870                 ctio->u.status0.flags |= cpu_to_le16(
2871                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2872                     CTIO7_FLAGS_CONFORM_REQ);
2873         }
2874         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2875         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2876         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2877                 int i;
2878
2879                 if (qlt_need_explicit_conf(prm->cmd, 1)) {
2880                         if ((prm->rq_result & SS_SCSI_STATUS_BYTE) != 0) {
2881                                 ql_dbg_qp(ql_dbg_tgt, prm->cmd->qpair, 0xe017,
2882                                     "Skipping EXPLICIT_CONFORM and "
2883                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2884                                     "non GOOD status\n");
2885                                 goto skip_explict_conf;
2886                         }
2887                         ctio->u.status1.flags |= cpu_to_le16(
2888                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2889                             CTIO7_FLAGS_CONFORM_REQ);
2890                 }
2891 skip_explict_conf:
2892                 ctio->u.status1.flags &=
2893                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2894                 ctio->u.status1.flags |=
2895                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2896                 ctio->u.status1.scsi_status |=
2897                     cpu_to_le16(SS_SENSE_LEN_VALID);
2898                 ctio->u.status1.sense_length =
2899                     cpu_to_le16(prm->sense_buffer_len);
2900                 for (i = 0; i < prm->sense_buffer_len/4; i++) {
2901                         uint32_t v;
2902
2903                         v = get_unaligned_be32(
2904                                         &((uint32_t *)prm->sense_buffer)[i]);
2905                         put_unaligned_le32(v,
2906                                 &((uint32_t *)ctio->u.status1.sense_data)[i]);
2907                 }
2908                 qlt_print_dif_err(prm);
2909
2910         } else {
2911                 ctio->u.status1.flags &=
2912                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2913                 ctio->u.status1.flags |=
2914                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2915                 ctio->u.status1.sense_length = 0;
2916                 memset(ctio->u.status1.sense_data, 0,
2917                     sizeof(ctio->u.status1.sense_data));
2918         }
2919
2920         /* Sense with len > 24, is it possible ??? */
2921 }
2922
2923 static inline int
2924 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2925 {
2926         switch (se_cmd->prot_op) {
2927         case TARGET_PROT_DOUT_INSERT:
2928         case TARGET_PROT_DIN_STRIP:
2929                 if (ql2xenablehba_err_chk >= 1)
2930                         return 1;
2931                 break;
2932         case TARGET_PROT_DOUT_PASS:
2933         case TARGET_PROT_DIN_PASS:
2934                 if (ql2xenablehba_err_chk >= 2)
2935                         return 1;
2936                 break;
2937         case TARGET_PROT_DIN_INSERT:
2938         case TARGET_PROT_DOUT_STRIP:
2939                 return 1;
2940         default:
2941                 break;
2942         }
2943         return 0;
2944 }
2945
2946 static inline int
2947 qla_tgt_ref_mask_check(struct se_cmd *se_cmd)
2948 {
2949         switch (se_cmd->prot_op) {
2950         case TARGET_PROT_DIN_INSERT:
2951         case TARGET_PROT_DOUT_INSERT:
2952         case TARGET_PROT_DIN_STRIP:
2953         case TARGET_PROT_DOUT_STRIP:
2954         case TARGET_PROT_DIN_PASS:
2955         case TARGET_PROT_DOUT_PASS:
2956             return 1;
2957         default:
2958             return 0;
2959         }
2960         return 0;
2961 }
2962
2963 /*
2964  * qla_tgt_set_dif_tags - Extract Ref and App tags from SCSI command
2965  */
2966 static void
2967 qla_tgt_set_dif_tags(struct qla_tgt_cmd *cmd, struct crc_context *ctx,
2968     uint16_t *pfw_prot_opts)
2969 {
2970         struct se_cmd *se_cmd = &cmd->se_cmd;
2971         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2972         scsi_qla_host_t *vha = cmd->tgt->vha;
2973         struct qla_hw_data *ha = vha->hw;
2974         uint32_t t32 = 0;
2975
2976         /*
2977          * wait till Mode Sense/Select cmd, modepage Ah, subpage 2
2978          * have been immplemented by TCM, before AppTag is avail.
2979          * Look for modesense_handlers[]
2980          */
2981         ctx->app_tag = 0;
2982         ctx->app_tag_mask[0] = 0x0;
2983         ctx->app_tag_mask[1] = 0x0;
2984
2985         if (IS_PI_UNINIT_CAPABLE(ha)) {
2986                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2987                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2988                         *pfw_prot_opts |= PO_DIS_VALD_APP_ESC;
2989                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2990                         *pfw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2991         }
2992
2993         t32 = ha->tgt.tgt_ops->get_dif_tags(cmd, pfw_prot_opts);
2994
2995         switch (se_cmd->prot_type) {
2996         case TARGET_DIF_TYPE0_PROT:
2997                 /*
2998                  * No check for ql2xenablehba_err_chk, as it
2999                  * would be an I/O error if hba tag generation
3000                  * is not done.
3001                  */
3002                 ctx->ref_tag = cpu_to_le32(lba);
3003                 /* enable ALL bytes of the ref tag */
3004                 ctx->ref_tag_mask[0] = 0xff;
3005                 ctx->ref_tag_mask[1] = 0xff;
3006                 ctx->ref_tag_mask[2] = 0xff;
3007                 ctx->ref_tag_mask[3] = 0xff;
3008                 break;
3009         case TARGET_DIF_TYPE1_PROT:
3010             /*
3011              * For TYPE 1 protection: 16 bit GUARD tag, 32 bit
3012              * REF tag, and 16 bit app tag.
3013              */
3014             ctx->ref_tag = cpu_to_le32(lba);
3015             if (!qla_tgt_ref_mask_check(se_cmd) ||
3016                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
3017                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3018                     break;
3019             }
3020             /* enable ALL bytes of the ref tag */
3021             ctx->ref_tag_mask[0] = 0xff;
3022             ctx->ref_tag_mask[1] = 0xff;
3023             ctx->ref_tag_mask[2] = 0xff;
3024             ctx->ref_tag_mask[3] = 0xff;
3025             break;
3026         case TARGET_DIF_TYPE2_PROT:
3027             /*
3028              * For TYPE 2 protection: 16 bit GUARD + 32 bit REF
3029              * tag has to match LBA in CDB + N
3030              */
3031             ctx->ref_tag = cpu_to_le32(lba);
3032             if (!qla_tgt_ref_mask_check(se_cmd) ||
3033                 !(ha->tgt.tgt_ops->chk_dif_tags(t32))) {
3034                     *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3035                     break;
3036             }
3037             /* enable ALL bytes of the ref tag */
3038             ctx->ref_tag_mask[0] = 0xff;
3039             ctx->ref_tag_mask[1] = 0xff;
3040             ctx->ref_tag_mask[2] = 0xff;
3041             ctx->ref_tag_mask[3] = 0xff;
3042             break;
3043         case TARGET_DIF_TYPE3_PROT:
3044             /* For TYPE 3 protection: 16 bit GUARD only */
3045             *pfw_prot_opts |= PO_DIS_REF_TAG_VALD;
3046             ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
3047                 ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
3048             break;
3049         }
3050 }
3051
3052 static inline int
3053 qlt_build_ctio_crc2_pkt(struct qla_qpair *qpair, struct qla_tgt_prm *prm)
3054 {
3055         struct dsd64            *cur_dsd;
3056         uint32_t                transfer_length = 0;
3057         uint32_t                data_bytes;
3058         uint32_t                dif_bytes;
3059         uint8_t                 bundling = 1;
3060         struct crc_context      *crc_ctx_pkt = NULL;
3061         struct qla_hw_data      *ha;
3062         struct ctio_crc2_to_fw  *pkt;
3063         dma_addr_t              crc_ctx_dma;
3064         uint16_t                fw_prot_opts = 0;
3065         struct qla_tgt_cmd      *cmd = prm->cmd;
3066         struct se_cmd           *se_cmd = &cmd->se_cmd;
3067         uint32_t h;
3068         struct atio_from_isp *atio = &prm->cmd->atio;
3069         struct qla_tc_param     tc;
3070         uint16_t t16;
3071         scsi_qla_host_t *vha = cmd->vha;
3072
3073         ha = vha->hw;
3074
3075         pkt = (struct ctio_crc2_to_fw *)qpair->req->ring_ptr;
3076         prm->pkt = pkt;
3077         memset(pkt, 0, sizeof(*pkt));
3078
3079         ql_dbg_qp(ql_dbg_tgt, cmd->qpair, 0xe071,
3080                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
3081                 cmd->vp_idx, __func__, se_cmd, se_cmd->prot_op,
3082                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
3083
3084         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
3085             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
3086                 bundling = 0;
3087
3088         /* Compute dif len and adjust data len to incude protection */
3089         data_bytes = cmd->bufflen;
3090         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
3091
3092         switch (se_cmd->prot_op) {
3093         case TARGET_PROT_DIN_INSERT:
3094         case TARGET_PROT_DOUT_STRIP:
3095                 transfer_length = data_bytes;
3096                 if (cmd->prot_sg_cnt)
3097                         data_bytes += dif_bytes;
3098                 break;
3099         case TARGET_PROT_DIN_STRIP:
3100         case TARGET_PROT_DOUT_INSERT:
3101         case TARGET_PROT_DIN_PASS:
3102         case TARGET_PROT_DOUT_PASS:
3103                 transfer_length = data_bytes + dif_bytes;
3104                 break;
3105         default:
3106                 BUG();
3107                 break;
3108         }
3109
3110         if (!qlt_hba_err_chk_enabled(se_cmd))
3111                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
3112         /* HBA error checking enabled */
3113         else if (IS_PI_UNINIT_CAPABLE(ha)) {
3114                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
3115                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
3116                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
3117                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
3118                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
3119         }
3120
3121         switch (se_cmd->prot_op) {
3122         case TARGET_PROT_DIN_INSERT:
3123         case TARGET_PROT_DOUT_INSERT:
3124                 fw_prot_opts |= PO_MODE_DIF_INSERT;
3125                 break;
3126         case TARGET_PROT_DIN_STRIP:
3127         case TARGET_PROT_DOUT_STRIP:
3128                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
3129                 break;
3130         case TARGET_PROT_DIN_PASS:
3131         case TARGET_PROT_DOUT_PASS:
3132                 fw_prot_opts |= PO_MODE_DIF_PASS;
3133                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
3134                 break;
3135         default:/* Normal Request */
3136                 fw_prot_opts |= PO_MODE_DIF_PASS;
3137                 break;
3138         }
3139
3140         /* ---- PKT ---- */
3141         /* Update entry type to indicate Command Type CRC_2 IOCB */
3142         pkt->entry_type  = CTIO_CRC2;
3143         pkt->entry_count = 1;
3144         pkt->vp_index = cmd->vp_idx;
3145
3146         h = qlt_make_handle(qpair);
3147         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
3148                 /*
3149                  * CTIO type 7 from the firmware doesn't provide a way to
3150                  * know the initiator's LOOP ID, hence we can't find
3151                  * the session and, so, the command.
3152                  */
3153                 return -EAGAIN;
3154         } else
3155                 qpair->req->outstanding_cmds[h] = (srb_t *)prm->cmd;
3156
3157         pkt->handle  = make_handle(qpair->req->id, h);
3158         pkt->handle |= CTIO_COMPLETION_HANDLE_MARK;
3159         pkt->nport_handle = cpu_to_le16(prm->cmd->loop_id);
3160         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3161         pkt->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3162         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
3163
3164         /* silence compile warning */
3165         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3166         pkt->ox_id  = cpu_to_le16(t16);
3167
3168         t16 = (atio->u.isp24.attr << 9);
3169         pkt->flags |= cpu_to_le16(t16);
3170         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
3171
3172         /* Set transfer direction */
3173         if (cmd->dma_data_direction == DMA_TO_DEVICE)
3174                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
3175         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
3176                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
3177
3178         pkt->dseg_count = cpu_to_le16(prm->tot_dsds);
3179         /* Fibre channel byte count */
3180         pkt->transfer_length = cpu_to_le32(transfer_length);
3181
3182         /* ----- CRC context -------- */
3183
3184         /* Allocate CRC context from global pool */
3185         crc_ctx_pkt = cmd->ctx =
3186             dma_pool_zalloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
3187
3188         if (!crc_ctx_pkt)
3189                 goto crc_queuing_error;
3190
3191         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
3192         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
3193
3194         /* Set handle */
3195         crc_ctx_pkt->handle = pkt->handle;
3196
3197         qla_tgt_set_dif_tags(cmd, crc_ctx_pkt, &fw_prot_opts);
3198
3199         put_unaligned_le64(crc_ctx_dma, &pkt->crc_context_address);
3200         pkt->crc_context_len = cpu_to_le16(CRC_CONTEXT_LEN_FW);
3201
3202         if (!bundling) {
3203                 cur_dsd = &crc_ctx_pkt->u.nobundling.data_dsd[0];
3204         } else {
3205                 /*
3206                  * Configure Bundling if we need to fetch interlaving
3207                  * protection PCI accesses
3208                  */
3209                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
3210                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
3211                 crc_ctx_pkt->u.bundling.dseg_count =
3212                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
3213                 cur_dsd = &crc_ctx_pkt->u.bundling.data_dsd[0];
3214         }
3215
3216         /* Finish the common fields of CRC pkt */
3217         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
3218         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
3219         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
3220         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
3221
3222         memset((uint8_t *)&tc, 0 , sizeof(tc));
3223         tc.vha = vha;
3224         tc.blk_sz = cmd->blk_sz;
3225         tc.bufflen = cmd->bufflen;
3226         tc.sg = cmd->sg;
3227         tc.prot_sg = cmd->prot_sg;
3228         tc.ctx = crc_ctx_pkt;
3229         tc.ctx_dsd_alloced = &cmd->ctx_dsd_alloced;
3230
3231         /* Walks data segments */
3232         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
3233
3234         if (!bundling && prm->prot_seg_cnt) {
3235                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
3236                         prm->tot_dsds, &tc))
3237                         goto crc_queuing_error;
3238         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
3239                 (prm->tot_dsds - prm->prot_seg_cnt), &tc))
3240                 goto crc_queuing_error;
3241
3242         if (bundling && prm->prot_seg_cnt) {
3243                 /* Walks dif segments */
3244                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
3245
3246                 cur_dsd = &crc_ctx_pkt->u.bundling.dif_dsd;
3247                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
3248                         prm->prot_seg_cnt, cmd))
3249                         goto crc_queuing_error;
3250         }
3251         return QLA_SUCCESS;
3252
3253 crc_queuing_error:
3254         /* Cleanup will be performed by the caller */
3255         qpair->req->outstanding_cmds[h] = NULL;
3256
3257         return QLA_FUNCTION_FAILED;
3258 }
3259
3260 /*
3261  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
3262  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
3263  */
3264 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
3265         uint8_t scsi_status)
3266 {
3267         struct scsi_qla_host *vha = cmd->vha;
3268         struct qla_qpair *qpair = cmd->qpair;
3269         struct ctio7_to_24xx *pkt;
3270         struct qla_tgt_prm prm;
3271         uint32_t full_req_cnt = 0;
3272         unsigned long flags = 0;
3273         int res;
3274
3275         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3276             (cmd->sess && cmd->sess->deleted)) {
3277                 cmd->state = QLA_TGT_STATE_PROCESSED;
3278                 return 0;
3279         }
3280
3281         ql_dbg_qp(ql_dbg_tgt, qpair, 0xe018,
3282             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p] qp %d\n",
3283             (xmit_type & QLA_TGT_XMIT_STATUS) ?
3284             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
3285             &cmd->se_cmd, qpair->id);
3286
3287         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
3288             &full_req_cnt);
3289         if (unlikely(res != 0)) {
3290                 return res;
3291         }
3292
3293         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3294
3295         if (xmit_type == QLA_TGT_XMIT_STATUS)
3296                 qpair->tgt_counters.core_qla_snd_status++;
3297         else
3298                 qpair->tgt_counters.core_qla_que_buf++;
3299
3300         if (!qpair->fw_started || cmd->reset_count != qpair->chip_reset) {
3301                 /*
3302                  * Either the port is not online or this request was from
3303                  * previous life, just abort the processing.
3304                  */
3305                 cmd->state = QLA_TGT_STATE_PROCESSED;
3306                 ql_dbg_qp(ql_dbg_async, qpair, 0xe101,
3307                         "RESET-RSP online/active/old-count/new-count = %d/%d/%d/%d.\n",
3308                         vha->flags.online, qla2x00_reset_active(vha),
3309                         cmd->reset_count, qpair->chip_reset);
3310                 res = 0;
3311                 goto out_unmap_unlock;
3312         }
3313
3314         /* Does F/W have an IOCBs for this request */
3315         res = qlt_check_reserve_free_req(qpair, full_req_cnt);
3316         if (unlikely(res))
3317                 goto out_unmap_unlock;
3318
3319         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
3320                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3321         else
3322                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3323         if (unlikely(res != 0)) {
3324                 qpair->req->cnt += full_req_cnt;
3325                 goto out_unmap_unlock;
3326         }
3327
3328         pkt = (struct ctio7_to_24xx *)prm.pkt;
3329
3330         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
3331                 pkt->u.status0.flags |=
3332                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
3333                         CTIO7_FLAGS_STATUS_MODE_0);
3334
3335                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3336                         qlt_load_data_segments(&prm);
3337
3338                 if (prm.add_status_pkt == 0) {
3339                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
3340                                 pkt->u.status0.scsi_status =
3341                                     cpu_to_le16(prm.rq_result);
3342                                 if (!cmd->edif)
3343                                         pkt->u.status0.residual =
3344                                                 cpu_to_le32(prm.residual);
3345
3346                                 pkt->u.status0.flags |= cpu_to_le16(
3347                                     CTIO7_FLAGS_SEND_STATUS);
3348                                 if (qlt_need_explicit_conf(cmd, 0)) {
3349                                         pkt->u.status0.flags |=
3350                                             cpu_to_le16(
3351                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
3352                                                 CTIO7_FLAGS_CONFORM_REQ);
3353                                 }
3354                         }
3355
3356                 } else {
3357                         /*
3358                          * We have already made sure that there is sufficient
3359                          * amount of request entries to not drop HW lock in
3360                          * req_pkt().
3361                          */
3362                         struct ctio7_to_24xx *ctio =
3363                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(
3364                                     qpair->req);
3365
3366                         ql_dbg_qp(ql_dbg_tgt, qpair, 0x305e,
3367                             "Building additional status packet 0x%p.\n",
3368                             ctio);
3369
3370                         /*
3371                          * T10Dif: ctio_crc2_to_fw overlay ontop of
3372                          * ctio7_to_24xx
3373                          */
3374                         memcpy(ctio, pkt, sizeof(*ctio));
3375                         /* reset back to CTIO7 */
3376                         ctio->entry_count = 1;
3377                         ctio->entry_type = CTIO_TYPE7;
3378                         ctio->dseg_count = 0;
3379                         ctio->u.status1.flags &= ~cpu_to_le16(
3380                             CTIO7_FLAGS_DATA_IN);
3381
3382                         /* Real finish is ctio_m1's finish */
3383                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
3384                         pkt->u.status0.flags |= cpu_to_le16(
3385                             CTIO7_FLAGS_DONT_RET_CTIO);
3386
3387                         /* qlt_24xx_init_ctio_to_isp will correct
3388                          * all neccessary fields that's part of CTIO7.
3389                          * There should be no residual of CTIO-CRC2 data.
3390                          */
3391                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
3392                             &prm);
3393                 }
3394         } else
3395                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
3396
3397
3398         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
3399         cmd->cmd_sent_to_fw = 1;
3400         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3401
3402         /* Memory Barrier */
3403         wmb();
3404         if (qpair->reqq_start_iocbs)
3405                 qpair->reqq_start_iocbs(qpair);
3406         else
3407                 qla2x00_start_iocbs(vha, qpair->req);
3408         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3409
3410         return 0;
3411
3412 out_unmap_unlock:
3413         qlt_unmap_sg(vha, cmd);
3414         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3415
3416         return res;
3417 }
3418 EXPORT_SYMBOL(qlt_xmit_response);
3419
3420 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
3421 {
3422         struct ctio7_to_24xx *pkt;
3423         struct scsi_qla_host *vha = cmd->vha;
3424         struct qla_tgt *tgt = cmd->tgt;
3425         struct qla_tgt_prm prm;
3426         unsigned long flags = 0;
3427         int res = 0;
3428         struct qla_qpair *qpair = cmd->qpair;
3429
3430         memset(&prm, 0, sizeof(prm));
3431         prm.cmd = cmd;
3432         prm.tgt = tgt;
3433         prm.sg = NULL;
3434         prm.req_cnt = 1;
3435
3436         if (!qpair->fw_started || (cmd->reset_count != qpair->chip_reset) ||
3437             (cmd->sess && cmd->sess->deleted)) {
3438                 /*
3439                  * Either the port is not online or this request was from
3440                  * previous life, just abort the processing.
3441                  */
3442                 cmd->aborted = 1;
3443                 cmd->write_data_transferred = 0;
3444                 cmd->state = QLA_TGT_STATE_DATA_IN;
3445                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3446                 ql_dbg_qp(ql_dbg_async, qpair, 0xe102,
3447                         "RESET-XFR online/active/old-count/new-count = %d/%d/%d/%d.\n",
3448                         vha->flags.online, qla2x00_reset_active(vha),
3449                         cmd->reset_count, qpair->chip_reset);
3450                 return 0;
3451         }
3452
3453         /* Calculate number of entries and segments required */
3454         if (qlt_pci_map_calc_cnt(&prm) != 0)
3455                 return -EAGAIN;
3456
3457         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3458         /* Does F/W have an IOCBs for this request */
3459         res = qlt_check_reserve_free_req(qpair, prm.req_cnt);
3460         if (res != 0)
3461                 goto out_unlock_free_unmap;
3462         if (cmd->se_cmd.prot_op)
3463                 res = qlt_build_ctio_crc2_pkt(qpair, &prm);
3464         else
3465                 res = qlt_24xx_build_ctio_pkt(qpair, &prm);
3466
3467         if (unlikely(res != 0)) {
3468                 qpair->req->cnt += prm.req_cnt;
3469                 goto out_unlock_free_unmap;
3470         }
3471
3472         pkt = (struct ctio7_to_24xx *)prm.pkt;
3473         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
3474             CTIO7_FLAGS_STATUS_MODE_0);
3475
3476         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
3477                 qlt_load_data_segments(&prm);
3478
3479         cmd->state = QLA_TGT_STATE_NEED_DATA;
3480         cmd->cmd_sent_to_fw = 1;
3481         cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags);
3482
3483         /* Memory Barrier */
3484         wmb();
3485         if (qpair->reqq_start_iocbs)
3486                 qpair->reqq_start_iocbs(qpair);
3487         else
3488                 qla2x00_start_iocbs(vha, qpair->req);
3489         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3490
3491         return res;
3492
3493 out_unlock_free_unmap:
3494         qlt_unmap_sg(vha, cmd);
3495         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3496
3497         return res;
3498 }
3499 EXPORT_SYMBOL(qlt_rdy_to_xfer);
3500
3501
3502 /*
3503  * it is assumed either hardware_lock or qpair lock is held.
3504  */
3505 static void
3506 qlt_handle_dif_error(struct qla_qpair *qpair, struct qla_tgt_cmd *cmd,
3507         struct ctio_crc_from_fw *sts)
3508 {
3509         uint8_t         *ap = &sts->actual_dif[0];
3510         uint8_t         *ep = &sts->expected_dif[0];
3511         uint64_t        lba = cmd->se_cmd.t_task_lba;
3512         uint8_t scsi_status, sense_key, asc, ascq;
3513         unsigned long flags;
3514         struct scsi_qla_host *vha = cmd->vha;
3515
3516         cmd->trc_flags |= TRC_DIF_ERR;
3517
3518         cmd->a_guard   = get_unaligned_be16(ap + 0);
3519         cmd->a_app_tag = get_unaligned_be16(ap + 2);
3520         cmd->a_ref_tag = get_unaligned_be32(ap + 4);
3521
3522         cmd->e_guard   = get_unaligned_be16(ep + 0);
3523         cmd->e_app_tag = get_unaligned_be16(ep + 2);
3524         cmd->e_ref_tag = get_unaligned_be32(ep + 4);
3525
3526         ql_dbg(ql_dbg_tgt_dif, vha, 0xf075,
3527             "%s: aborted %d state %d\n", __func__, cmd->aborted, cmd->state);
3528
3529         scsi_status = sense_key = asc = ascq = 0;
3530
3531         /* check appl tag */
3532         if (cmd->e_app_tag != cmd->a_app_tag) {
3533                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00d,
3534                     "App Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3535                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3536                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3537                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3538                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3539
3540                 cmd->dif_err_code = DIF_ERR_APP;
3541                 scsi_status = SAM_STAT_CHECK_CONDITION;
3542                 sense_key = ABORTED_COMMAND;
3543                 asc = 0x10;
3544                 ascq = 0x2;
3545         }
3546
3547         /* check ref tag */
3548         if (cmd->e_ref_tag != cmd->a_ref_tag) {
3549                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe00e,
3550                     "Ref Tag ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard[%x|%x] cmd=%p ox_id[%04x] ",
3551                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3552                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3553                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3554                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3555
3556                 cmd->dif_err_code = DIF_ERR_REF;
3557                 scsi_status = SAM_STAT_CHECK_CONDITION;
3558                 sense_key = ABORTED_COMMAND;
3559                 asc = 0x10;
3560                 ascq = 0x3;
3561                 goto out;
3562         }
3563
3564         /* check guard */
3565         if (cmd->e_guard != cmd->a_guard) {
3566                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe012,
3567                     "Guard ERR: cdb[%x] lba[%llx %llx] blks[%x] [Actual|Expected] Ref[%x|%x], App[%x|%x], Guard [%x|%x] cmd=%p ox_id[%04x]",
3568                     cmd->cdb[0], lba, (lba+cmd->num_blks), cmd->num_blks,
3569                     cmd->a_ref_tag, cmd->e_ref_tag, cmd->a_app_tag,
3570                     cmd->e_app_tag, cmd->a_guard, cmd->e_guard, cmd,
3571                     cmd->atio.u.isp24.fcp_hdr.ox_id);
3572
3573                 cmd->dif_err_code = DIF_ERR_GRD;
3574                 scsi_status = SAM_STAT_CHECK_CONDITION;
3575                 sense_key = ABORTED_COMMAND;
3576                 asc = 0x10;
3577                 ascq = 0x1;
3578         }
3579 out:
3580         switch (cmd->state) {
3581         case QLA_TGT_STATE_NEED_DATA:
3582                 /* handle_data will load DIF error code  */
3583                 cmd->state = QLA_TGT_STATE_DATA_IN;
3584                 vha->hw->tgt.tgt_ops->handle_data(cmd);
3585                 break;
3586         default:
3587                 spin_lock_irqsave(&cmd->cmd_lock, flags);
3588                 if (cmd->aborted) {
3589                         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3590                         vha->hw->tgt.tgt_ops->free_cmd(cmd);
3591                         break;
3592                 }
3593                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3594
3595                 qlt_send_resp_ctio(qpair, cmd, scsi_status, sense_key, asc,
3596                     ascq);
3597                 /* assume scsi status gets out on the wire.
3598                  * Will not wait for completion.
3599                  */
3600                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3601                 break;
3602         }
3603 }
3604
3605 /* If hardware_lock held on entry, might drop it, then reaquire */
3606 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
3607 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3608         struct imm_ntfy_from_isp *ntfy)
3609 {
3610         struct nack_to_isp *nack;
3611         struct qla_hw_data *ha = vha->hw;
3612         request_t *pkt;
3613         int ret = 0;
3614
3615         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
3616             "Sending TERM ELS CTIO (ha=%p)\n", ha);
3617
3618         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3619         if (pkt == NULL) {
3620                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
3621                     "qla_target(%d): %s failed: unable to allocate "
3622                     "request packet\n", vha->vp_idx, __func__);
3623                 return -ENOMEM;
3624         }
3625
3626         pkt->entry_type = NOTIFY_ACK_TYPE;
3627         pkt->entry_count = 1;
3628         pkt->handle = QLA_TGT_SKIP_HANDLE;
3629
3630         nack = (struct nack_to_isp *)pkt;
3631         nack->ox_id = ntfy->ox_id;
3632
3633         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
3634         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
3635                 nack->u.isp24.flags = ntfy->u.isp24.flags &
3636                         cpu_to_le16(NOTIFY24XX_FLAGS_PUREX_IOCB);
3637         }
3638
3639         /* terminate */
3640         nack->u.isp24.flags |=
3641                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
3642
3643         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
3644         nack->u.isp24.status = ntfy->u.isp24.status;
3645         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
3646         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
3647         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
3648         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
3649         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
3650         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
3651
3652         qla2x00_start_iocbs(vha, vha->req);
3653         return ret;
3654 }
3655
3656 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
3657         struct imm_ntfy_from_isp *imm, int ha_locked)
3658 {
3659         int rc;
3660
3661         WARN_ON_ONCE(!ha_locked);
3662         rc = __qlt_send_term_imm_notif(vha, imm);
3663         pr_debug("rc = %d\n", rc);
3664 }
3665
3666 /*
3667  * If hardware_lock held on entry, might drop it, then reaquire
3668  * This function sends the appropriate CTIO to ISP 2xxx or 24xx
3669  */
3670 static int __qlt_send_term_exchange(struct qla_qpair *qpair,
3671         struct qla_tgt_cmd *cmd,
3672         struct atio_from_isp *atio)
3673 {
3674         struct scsi_qla_host *vha = qpair->vha;
3675         struct ctio7_to_24xx *ctio24;
3676         struct qla_hw_data *ha = vha->hw;
3677         request_t *pkt;
3678         int ret = 0;
3679         uint16_t temp;
3680
3681         ql_dbg(ql_dbg_tgt, vha, 0xe009, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
3682
3683         if (cmd)
3684                 vha = cmd->vha;
3685
3686         pkt = (request_t *)qla2x00_alloc_iocbs_ready(qpair, NULL);
3687         if (pkt == NULL) {
3688                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
3689                     "qla_target(%d): %s failed: unable to allocate "
3690                     "request packet\n", vha->vp_idx, __func__);
3691                 return -ENOMEM;
3692         }
3693
3694         if (cmd != NULL) {
3695                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
3696                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
3697                             "qla_target(%d): Terminating cmd %p with "
3698                             "incorrect state %d\n", vha->vp_idx, cmd,
3699                             cmd->state);
3700                 } else
3701                         ret = 1;
3702         }
3703
3704         qpair->tgt_counters.num_term_xchg_sent++;
3705         pkt->entry_count = 1;
3706         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3707
3708         ctio24 = (struct ctio7_to_24xx *)pkt;
3709         ctio24->entry_type = CTIO_TYPE7;
3710         ctio24->nport_handle = cpu_to_le16(CTIO7_NHANDLE_UNRECOGNIZED);
3711         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
3712         ctio24->vp_index = vha->vp_idx;
3713         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
3714         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3715         temp = (atio->u.isp24.attr << 9) | CTIO7_FLAGS_STATUS_MODE_1 |
3716                 CTIO7_FLAGS_TERMINATE;
3717         ctio24->u.status1.flags = cpu_to_le16(temp);
3718         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
3719         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3720
3721         /* Memory Barrier */
3722         wmb();
3723         if (qpair->reqq_start_iocbs)
3724                 qpair->reqq_start_iocbs(qpair);
3725         else
3726                 qla2x00_start_iocbs(vha, qpair->req);
3727         return ret;
3728 }
3729
3730 static void qlt_send_term_exchange(struct qla_qpair *qpair,
3731         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked,
3732         int ul_abort)
3733 {
3734         struct scsi_qla_host *vha;
3735         unsigned long flags = 0;
3736         int rc;
3737
3738         /* why use different vha? NPIV */
3739         if (cmd)
3740                 vha = cmd->vha;
3741         else
3742                 vha = qpair->vha;
3743
3744         if (ha_locked) {
3745                 rc = __qlt_send_term_exchange(qpair, cmd, atio);
3746                 if (rc == -ENOMEM)
3747                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3748                 goto done;
3749         }
3750         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
3751         rc = __qlt_send_term_exchange(qpair, cmd, atio);
3752         if (rc == -ENOMEM)
3753                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3754
3755 done:
3756         if (cmd && !ul_abort && !cmd->aborted) {
3757                 if (cmd->sg_mapped)
3758                         qlt_unmap_sg(vha, cmd);
3759                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3760         }
3761
3762         if (!ha_locked)
3763                 spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
3764
3765         return;
3766 }
3767
3768 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3769 {
3770         struct list_head free_list;
3771         struct qla_tgt_cmd *cmd, *tcmd;
3772
3773         vha->hw->tgt.leak_exchg_thresh_hold =
3774             (vha->hw->cur_fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3775
3776         cmd = tcmd = NULL;
3777         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3778                 INIT_LIST_HEAD(&free_list);
3779                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3780
3781                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3782                         list_del(&cmd->cmd_list);
3783                         /* This cmd was never sent to TCM.  There is no need
3784                          * to schedule free or call free_cmd
3785                          */
3786                         qlt_free_cmd(cmd);
3787                         vha->hw->tgt.num_qfull_cmds_alloc--;
3788                 }
3789         }
3790         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3791 }
3792
3793 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3794 {
3795         uint32_t total_leaked;
3796
3797         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3798
3799         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3800             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3801
3802                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3803                     "Chip reset due to exchange starvation: %d/%d.\n",
3804                     total_leaked, vha->hw->cur_fw_xcb_count);
3805
3806                 if (IS_P3P_TYPE(vha->hw))
3807                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3808                 else
3809                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3810                 qla2xxx_wake_dpc(vha);
3811         }
3812
3813 }
3814
3815 int qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3816 {
3817         struct qla_tgt *tgt = cmd->tgt;
3818         struct scsi_qla_host *vha = tgt->vha;
3819         struct se_cmd *se_cmd = &cmd->se_cmd;
3820         unsigned long flags;
3821
3822         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3823             "qla_target(%d): terminating exchange for aborted cmd=%p "
3824             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3825             se_cmd->tag);
3826
3827         spin_lock_irqsave(&cmd->cmd_lock, flags);
3828         if (cmd->aborted) {
3829                 if (cmd->sg_mapped)
3830                         qlt_unmap_sg(vha, cmd);
3831
3832                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3833                 /*
3834                  * It's normal to see 2 calls in this path:
3835                  *  1) XFER Rdy completion + CMD_T_ABORT
3836                  *  2) TCM TMR - drain_state_list
3837                  */
3838                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf016,
3839                     "multiple abort. %p transport_state %x, t_state %x, "
3840                     "se_cmd_flags %x\n", cmd, cmd->se_cmd.transport_state,
3841                     cmd->se_cmd.t_state, cmd->se_cmd.se_cmd_flags);
3842                 return -EIO;
3843         }
3844         cmd->aborted = 1;
3845         cmd->trc_flags |= TRC_ABORT;
3846         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
3847
3848         qlt_send_term_exchange(cmd->qpair, cmd, &cmd->atio, 0, 1);
3849         return 0;
3850 }
3851 EXPORT_SYMBOL(qlt_abort_cmd);
3852
3853 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3854 {
3855         struct fc_port *sess = cmd->sess;
3856
3857         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3858             "%s: se_cmd[%p] ox_id %04x\n",
3859             __func__, &cmd->se_cmd,
3860             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3861
3862         BUG_ON(cmd->cmd_in_wq);
3863
3864         if (!cmd->q_full)
3865                 qlt_decr_num_pend_cmds(cmd->vha);
3866
3867         BUG_ON(cmd->sg_mapped);
3868         cmd->jiffies_at_free = get_jiffies_64();
3869
3870         if (!sess || !sess->se_sess) {
3871                 WARN_ON(1);
3872                 return;
3873         }
3874         cmd->jiffies_at_free = get_jiffies_64();
3875         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
3876 }
3877 EXPORT_SYMBOL(qlt_free_cmd);
3878
3879 /*
3880  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3881  */
3882 static int qlt_term_ctio_exchange(struct qla_qpair *qpair, void *ctio,
3883         struct qla_tgt_cmd *cmd, uint32_t status)
3884 {
3885         int term = 0;
3886         struct scsi_qla_host *vha = qpair->vha;
3887
3888         if (cmd->se_cmd.prot_op)
3889                 ql_dbg(ql_dbg_tgt_dif, vha, 0xe013,
3890                     "Term DIF cmd: lba[0x%llx|%lld] len[0x%x] "
3891                     "se_cmd=%p tag[%x] op %#x/%s",
3892                      cmd->lba, cmd->lba,
3893                      cmd->num_blks, &cmd->se_cmd,
3894                      cmd->atio.u.isp24.exchange_addr,
3895                      cmd->se_cmd.prot_op,
3896                      prot_op_str(cmd->se_cmd.prot_op));
3897
3898         if (ctio != NULL) {
3899                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3900
3901                 term = !(c->flags &
3902                     cpu_to_le16(OF_TERM_EXCH));
3903         } else
3904                 term = 1;
3905
3906         if (term)
3907                 qlt_send_term_exchange(qpair, cmd, &cmd->atio, 1, 0);
3908
3909         return term;
3910 }
3911
3912
3913 /* ha->hardware_lock supposed to be held on entry */
3914 static void *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3915         struct rsp_que *rsp, uint32_t handle, void *ctio)
3916 {
3917         void *cmd = NULL;
3918         struct req_que *req;
3919         int qid = GET_QID(handle);
3920         uint32_t h = handle & ~QLA_TGT_HANDLE_MASK;
3921
3922         if (unlikely(h == QLA_TGT_SKIP_HANDLE))
3923                 return NULL;
3924
3925         if (qid == rsp->req->id) {
3926                 req = rsp->req;
3927         } else if (vha->hw->req_q_map[qid]) {
3928                 ql_dbg(ql_dbg_tgt_mgt, vha, 0x1000a,
3929                     "qla_target(%d): CTIO completion with different QID %d handle %x\n",
3930                     vha->vp_idx, rsp->id, handle);
3931                 req = vha->hw->req_q_map[qid];
3932         } else {
3933                 return NULL;
3934         }
3935
3936         h &= QLA_CMD_HANDLE_MASK;
3937
3938         if (h != QLA_TGT_NULL_HANDLE) {
3939                 if (unlikely(h >= req->num_outstanding_cmds)) {
3940                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3941                             "qla_target(%d): Wrong handle %x received\n",
3942                             vha->vp_idx, handle);
3943                         return NULL;
3944                 }
3945
3946                 cmd = req->outstanding_cmds[h];
3947                 if (unlikely(cmd == NULL)) {
3948                         ql_dbg(ql_dbg_async, vha, 0xe053,
3949                             "qla_target(%d): Suspicious: unable to find the command with handle %x req->id %d rsp->id %d\n",
3950                                 vha->vp_idx, handle, req->id, rsp->id);
3951                         return NULL;
3952                 }
3953                 req->outstanding_cmds[h] = NULL;
3954         } else if (ctio != NULL) {
3955                 /* We can't get loop ID from CTIO7 */
3956                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3957                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3958                     "support NULL handles\n", vha->vp_idx);
3959                 return NULL;
3960         }
3961
3962         return cmd;
3963 }
3964
3965 /*
3966  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3967  */
3968 static void qlt_do_ctio_completion(struct scsi_qla_host *vha,
3969     struct rsp_que *rsp, uint32_t handle, uint32_t status, void *ctio)
3970 {
3971         struct qla_hw_data *ha = vha->hw;
3972         struct se_cmd *se_cmd;
3973         struct qla_tgt_cmd *cmd;
3974         struct qla_qpair *qpair = rsp->qpair;
3975
3976         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3977                 /* That could happen only in case of an error/reset/abort */
3978                 if (status != CTIO_SUCCESS) {
3979                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3980                             "Intermediate CTIO received"
3981                             " (status %x)\n", status);
3982                 }
3983                 return;
3984         }
3985
3986         cmd = qlt_ctio_to_cmd(vha, rsp, handle, ctio);
3987         if (cmd == NULL)
3988                 return;
3989
3990         if ((le16_to_cpu(((struct ctio7_from_24xx *)ctio)->flags) & CTIO7_FLAGS_DATA_OUT) &&
3991             cmd->sess) {
3992                 qlt_chk_edif_rx_sa_delete_pending(vha, cmd->sess,
3993                     (struct ctio7_from_24xx *)ctio);
3994         }
3995
3996         se_cmd = &cmd->se_cmd;
3997         cmd->cmd_sent_to_fw = 0;
3998
3999         qlt_unmap_sg(vha, cmd);
4000
4001         if (unlikely(status != CTIO_SUCCESS)) {
4002                 switch (status & 0xFFFF) {
4003                 case CTIO_INVALID_RX_ID:
4004                         if (printk_ratelimit())
4005                                 dev_info(&vha->hw->pdev->dev,
4006                                     "qla_target(%d): CTIO with INVALID_RX_ID ATIO attr %x CTIO Flags %x|%x\n",
4007                                     vha->vp_idx, cmd->atio.u.isp24.attr,
4008                                     ((cmd->ctio_flags >> 9) & 0xf),
4009                                     cmd->ctio_flags);
4010
4011                         break;
4012                 case CTIO_LIP_RESET:
4013                 case CTIO_TARGET_RESET:
4014                 case CTIO_ABORTED:
4015                         /* driver request abort via Terminate exchange */
4016                 case CTIO_TIMEOUT:
4017                         /* They are OK */
4018                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
4019                             "qla_target(%d): CTIO with "
4020                             "status %#x received, state %x, se_cmd %p, "
4021                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
4022                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
4023                             status, cmd->state, se_cmd);
4024                         break;
4025
4026                 case CTIO_PORT_LOGGED_OUT:
4027                 case CTIO_PORT_UNAVAILABLE:
4028                 {
4029                         int logged_out =
4030                                 (status & 0xFFFF) == CTIO_PORT_LOGGED_OUT;
4031
4032                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
4033                             "qla_target(%d): CTIO with %s status %x "
4034                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
4035                             logged_out ? "PORT LOGGED OUT" : "PORT UNAVAILABLE",
4036                             status, cmd->state, se_cmd);
4037
4038                         if (logged_out && cmd->sess) {
4039                                 /*
4040                                  * Session is already logged out, but we need
4041                                  * to notify initiator, who's not aware of this
4042                                  */
4043                                 cmd->sess->send_els_logo = 1;
4044                                 ql_dbg(ql_dbg_disc, vha, 0x20f8,
4045                                     "%s %d %8phC post del sess\n",
4046                                     __func__, __LINE__, cmd->sess->port_name);
4047
4048                                 qlt_schedule_sess_for_deletion(cmd->sess);
4049                         }
4050                         break;
4051                 }
4052                 case CTIO_DIF_ERROR: {
4053                         struct ctio_crc_from_fw *crc =
4054                                 (struct ctio_crc_from_fw *)ctio;
4055                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
4056                             "qla_target(%d): CTIO with DIF_ERROR status %x "
4057                             "received (state %x, ulp_cmd %p) actual_dif[0x%llx] "
4058                             "expect_dif[0x%llx]\n",
4059                             vha->vp_idx, status, cmd->state, se_cmd,
4060                             *((u64 *)&crc->actual_dif[0]),
4061                             *((u64 *)&crc->expected_dif[0]));
4062
4063                         qlt_handle_dif_error(qpair, cmd, ctio);
4064                         return;
4065                 }
4066
4067                 case CTIO_FAST_AUTH_ERR:
4068                 case CTIO_FAST_INCOMP_PAD_LEN:
4069                 case CTIO_FAST_INVALID_REQ:
4070                 case CTIO_FAST_SPI_ERR:
4071                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4072                             "qla_target(%d): CTIO with EDIF error status 0x%x received (state %x, se_cmd %p\n",
4073                             vha->vp_idx, status, cmd->state, se_cmd);
4074                         break;
4075
4076                 default:
4077                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
4078                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
4079                             vha->vp_idx, status, cmd->state, se_cmd);
4080                         break;
4081                 }
4082
4083
4084                 /* "cmd->aborted" means
4085                  * cmd is already aborted/terminated, we don't
4086                  * need to terminate again.  The exchange is already
4087                  * cleaned up/freed at FW level.  Just cleanup at driver
4088                  * level.
4089                  */
4090                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
4091                     (!cmd->aborted)) {
4092                         cmd->trc_flags |= TRC_CTIO_ERR;
4093                         if (qlt_term_ctio_exchange(qpair, ctio, cmd, status))
4094                                 return;
4095                 }
4096         }
4097
4098         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
4099                 cmd->trc_flags |= TRC_CTIO_DONE;
4100         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4101                 cmd->state = QLA_TGT_STATE_DATA_IN;
4102
4103                 if (status == CTIO_SUCCESS)
4104                         cmd->write_data_transferred = 1;
4105
4106                 ha->tgt.tgt_ops->handle_data(cmd);
4107                 return;
4108         } else if (cmd->aborted) {
4109                 cmd->trc_flags |= TRC_CTIO_ABORTED;
4110                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
4111                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
4112         } else {
4113                 cmd->trc_flags |= TRC_CTIO_STRANGE;
4114                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
4115                     "qla_target(%d): A command in state (%d) should "
4116                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
4117         }
4118
4119         if (unlikely(status != CTIO_SUCCESS) &&
4120                 !cmd->aborted) {
4121                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
4122                 dump_stack();
4123         }
4124
4125         ha->tgt.tgt_ops->free_cmd(cmd);
4126 }
4127
4128 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
4129         uint8_t task_codes)
4130 {
4131         int fcp_task_attr;
4132
4133         switch (task_codes) {
4134         case ATIO_SIMPLE_QUEUE:
4135                 fcp_task_attr = TCM_SIMPLE_TAG;
4136                 break;
4137         case ATIO_HEAD_OF_QUEUE:
4138                 fcp_task_attr = TCM_HEAD_TAG;
4139                 break;
4140         case ATIO_ORDERED_QUEUE:
4141                 fcp_task_attr = TCM_ORDERED_TAG;
4142                 break;
4143         case ATIO_ACA_QUEUE:
4144                 fcp_task_attr = TCM_ACA_TAG;
4145                 break;
4146         case ATIO_UNTAGGED:
4147                 fcp_task_attr = TCM_SIMPLE_TAG;
4148                 break;
4149         default:
4150                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
4151                     "qla_target: unknown task code %x, use ORDERED instead\n",
4152                     task_codes);
4153                 fcp_task_attr = TCM_ORDERED_TAG;
4154                 break;
4155         }
4156
4157         return fcp_task_attr;
4158 }
4159
4160 /*
4161  * Process context for I/O path into tcm_qla2xxx code
4162  */
4163 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
4164 {
4165         scsi_qla_host_t *vha = cmd->vha;
4166         struct qla_hw_data *ha = vha->hw;
4167         struct fc_port *sess = cmd->sess;
4168         struct atio_from_isp *atio = &cmd->atio;
4169         unsigned char *cdb;
4170         unsigned long flags;
4171         uint32_t data_length;
4172         int ret, fcp_task_attr, data_dir, bidi = 0;
4173         struct qla_qpair *qpair = cmd->qpair;
4174
4175         cmd->cmd_in_wq = 0;
4176         cmd->trc_flags |= TRC_DO_WORK;
4177
4178         if (cmd->aborted) {
4179                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
4180                     "cmd with tag %u is aborted\n",
4181                     cmd->atio.u.isp24.exchange_addr);
4182                 goto out_term;
4183         }
4184
4185         spin_lock_init(&cmd->cmd_lock);
4186         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
4187         cmd->se_cmd.tag = le32_to_cpu(atio->u.isp24.exchange_addr);
4188
4189         if (atio->u.isp24.fcp_cmnd.rddata &&
4190             atio->u.isp24.fcp_cmnd.wrdata) {
4191                 bidi = 1;
4192                 data_dir = DMA_TO_DEVICE;
4193         } else if (atio->u.isp24.fcp_cmnd.rddata)
4194                 data_dir = DMA_FROM_DEVICE;
4195         else if (atio->u.isp24.fcp_cmnd.wrdata)
4196                 data_dir = DMA_TO_DEVICE;
4197         else
4198                 data_dir = DMA_NONE;
4199
4200         fcp_task_attr = qlt_get_fcp_task_attr(vha,
4201             atio->u.isp24.fcp_cmnd.task_attr);
4202         data_length = get_datalen_for_atio(atio);
4203
4204         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
4205                                           fcp_task_attr, data_dir, bidi);
4206         if (ret != 0)
4207                 goto out_term;
4208         /*
4209          * Drop extra session reference from qlt_handle_cmd_for_atio().
4210          */
4211         ha->tgt.tgt_ops->put_sess(sess);
4212         return;
4213
4214 out_term:
4215         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
4216         /*
4217          * cmd has not sent to target yet, so pass NULL as the second
4218          * argument to qlt_send_term_exchange() and free the memory here.
4219          */
4220         cmd->trc_flags |= TRC_DO_WORK_ERR;
4221         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
4222         qlt_send_term_exchange(qpair, NULL, &cmd->atio, 1, 0);
4223
4224         qlt_decr_num_pend_cmds(vha);
4225         cmd->vha->hw->tgt.tgt_ops->rel_cmd(cmd);
4226         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
4227
4228         ha->tgt.tgt_ops->put_sess(sess);
4229 }
4230
4231 static void qlt_do_work(struct work_struct *work)
4232 {
4233         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
4234         scsi_qla_host_t *vha = cmd->vha;
4235         unsigned long flags;
4236
4237         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4238         list_del(&cmd->cmd_list);
4239         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4240
4241         __qlt_do_work(cmd);
4242 }
4243
4244 void qlt_clr_qp_table(struct scsi_qla_host *vha)
4245 {
4246         unsigned long flags;
4247         struct qla_hw_data *ha = vha->hw;
4248         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4249         void *node;
4250         u64 key = 0;
4251
4252         ql_log(ql_log_info, vha, 0x706c,
4253             "User update Number of Active Qpairs %d\n",
4254             ha->tgt.num_act_qpairs);
4255
4256         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
4257
4258         btree_for_each_safe64(&tgt->lun_qpair_map, key, node)
4259                 btree_remove64(&tgt->lun_qpair_map, key);
4260
4261         ha->base_qpair->lun_cnt = 0;
4262         for (key = 0; key < ha->max_qpairs; key++)
4263                 if (ha->queue_pair_map[key])
4264                         ha->queue_pair_map[key]->lun_cnt = 0;
4265
4266         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
4267 }
4268
4269 static void qlt_assign_qpair(struct scsi_qla_host *vha,
4270         struct qla_tgt_cmd *cmd)
4271 {
4272         struct qla_qpair *qpair, *qp;
4273         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4274         struct qla_qpair_hint *h;
4275
4276         if (vha->flags.qpairs_available) {
4277                 h = btree_lookup64(&tgt->lun_qpair_map, cmd->unpacked_lun);
4278                 if (unlikely(!h)) {
4279                         /* spread lun to qpair ratio evently */
4280                         int lcnt = 0, rc;
4281                         struct scsi_qla_host *base_vha =
4282                                 pci_get_drvdata(vha->hw->pdev);
4283
4284                         qpair = vha->hw->base_qpair;
4285                         if (qpair->lun_cnt == 0) {
4286                                 qpair->lun_cnt++;
4287                                 h = qla_qpair_to_hint(tgt, qpair);
4288                                 BUG_ON(!h);
4289                                 rc = btree_insert64(&tgt->lun_qpair_map,
4290                                         cmd->unpacked_lun, h, GFP_ATOMIC);
4291                                 if (rc) {
4292                                         qpair->lun_cnt--;
4293                                         ql_log(ql_log_info, vha, 0xd037,
4294                                             "Unable to insert lun %llx into lun_qpair_map\n",
4295                                             cmd->unpacked_lun);
4296                                 }
4297                                 goto out;
4298                         } else {
4299                                 lcnt = qpair->lun_cnt;
4300                         }
4301
4302                         h = NULL;
4303                         list_for_each_entry(qp, &base_vha->qp_list,
4304                             qp_list_elem) {
4305                                 if (qp->lun_cnt == 0) {
4306                                         qp->lun_cnt++;
4307                                         h = qla_qpair_to_hint(tgt, qp);
4308                                         BUG_ON(!h);
4309                                         rc = btree_insert64(&tgt->lun_qpair_map,
4310                                             cmd->unpacked_lun, h, GFP_ATOMIC);
4311                                         if (rc) {
4312                                                 qp->lun_cnt--;
4313                                                 ql_log(ql_log_info, vha, 0xd038,
4314                                                         "Unable to insert lun %llx into lun_qpair_map\n",
4315                                                         cmd->unpacked_lun);
4316                                         }
4317                                         qpair = qp;
4318                                         goto out;
4319                                 } else {
4320                                         if (qp->lun_cnt < lcnt) {
4321                                                 lcnt = qp->lun_cnt;
4322                                                 qpair = qp;
4323                                                 continue;
4324                                         }
4325                                 }
4326                         }
4327                         BUG_ON(!qpair);
4328                         qpair->lun_cnt++;
4329                         h = qla_qpair_to_hint(tgt, qpair);
4330                         BUG_ON(!h);
4331                         rc = btree_insert64(&tgt->lun_qpair_map,
4332                                 cmd->unpacked_lun, h, GFP_ATOMIC);
4333                         if (rc) {
4334                                 qpair->lun_cnt--;
4335                                 ql_log(ql_log_info, vha, 0xd039,
4336                                    "Unable to insert lun %llx into lun_qpair_map\n",
4337                                    cmd->unpacked_lun);
4338                         }
4339                 }
4340         } else {
4341                 h = &tgt->qphints[0];
4342         }
4343 out:
4344         cmd->qpair = h->qpair;
4345         cmd->se_cmd.cpuid = h->cpuid;
4346 }
4347
4348 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
4349                                        struct fc_port *sess,
4350                                        struct atio_from_isp *atio)
4351 {
4352         struct qla_tgt_cmd *cmd;
4353
4354         cmd = vha->hw->tgt.tgt_ops->get_cmd(sess);
4355         if (!cmd)
4356                 return NULL;
4357
4358         cmd->cmd_type = TYPE_TGT_CMD;
4359         memcpy(&cmd->atio, atio, sizeof(*atio));
4360         INIT_LIST_HEAD(&cmd->sess_cmd_list);
4361         cmd->state = QLA_TGT_STATE_NEW;
4362         cmd->tgt = vha->vha_tgt.qla_tgt;
4363         qlt_incr_num_pend_cmds(vha);
4364         cmd->vha = vha;
4365         cmd->sess = sess;
4366         cmd->loop_id = sess->loop_id;
4367         cmd->conf_compl_supported = sess->conf_compl_supported;
4368
4369         cmd->trc_flags = 0;
4370         cmd->jiffies_at_alloc = get_jiffies_64();
4371
4372         cmd->unpacked_lun = scsilun_to_int(
4373             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
4374         qlt_assign_qpair(vha, cmd);
4375         cmd->reset_count = vha->hw->base_qpair->chip_reset;
4376         cmd->vp_idx = vha->vp_idx;
4377         cmd->edif = sess->edif.enable;
4378
4379         return cmd;
4380 }
4381
4382 /* ha->hardware_lock supposed to be held on entry */
4383 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
4384         struct atio_from_isp *atio)
4385 {
4386         struct qla_hw_data *ha = vha->hw;
4387         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4388         struct fc_port *sess;
4389         struct qla_tgt_cmd *cmd;
4390         unsigned long flags;
4391         port_id_t id;
4392
4393         if (unlikely(tgt->tgt_stop)) {
4394                 ql_dbg(ql_dbg_io, vha, 0x3061,
4395                     "New command while device %p is shutting down\n", tgt);
4396                 return -ENODEV;
4397         }
4398
4399         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
4400         if (IS_SW_RESV_ADDR(id))
4401                 return -EBUSY;
4402
4403         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
4404         if (unlikely(!sess))
4405                 return -EFAULT;
4406
4407         /* Another WWN used to have our s_id. Our PLOGI scheduled its
4408          * session deletion, but it's still in sess_del_work wq */
4409         if (sess->deleted) {
4410                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
4411                     "New command while old session %p is being deleted\n",
4412                     sess);
4413                 return -EFAULT;
4414         }
4415
4416         /*
4417          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
4418          */
4419         if (!kref_get_unless_zero(&sess->sess_kref)) {
4420                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
4421                     "%s: kref_get fail, %8phC oxid %x \n",
4422                     __func__, sess->port_name,
4423                      be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
4424                 return -EFAULT;
4425         }
4426
4427         cmd = qlt_get_tag(vha, sess, atio);
4428         if (!cmd) {
4429                 ql_dbg(ql_dbg_io, vha, 0x3062,
4430                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
4431                 ha->tgt.tgt_ops->put_sess(sess);
4432                 return -EBUSY;
4433         }
4434
4435         cmd->cmd_in_wq = 1;
4436         cmd->trc_flags |= TRC_NEW_CMD;
4437
4438         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4439         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
4440         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4441
4442         INIT_WORK(&cmd->work, qlt_do_work);
4443         if (vha->flags.qpairs_available) {
4444                 queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq, &cmd->work);
4445         } else if (ha->msix_count) {
4446                 if (cmd->atio.u.isp24.fcp_cmnd.rddata)
4447                         queue_work_on(smp_processor_id(), qla_tgt_wq,
4448                             &cmd->work);
4449                 else
4450                         queue_work_on(cmd->se_cmd.cpuid, qla_tgt_wq,
4451                             &cmd->work);
4452         } else {
4453                 queue_work(qla_tgt_wq, &cmd->work);
4454         }
4455
4456         return 0;
4457 }
4458
4459 /* ha->hardware_lock supposed to be held on entry */
4460 static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
4461         int fn, void *iocb, int flags)
4462 {
4463         struct scsi_qla_host *vha = sess->vha;
4464         struct qla_hw_data *ha = vha->hw;
4465         struct qla_tgt_mgmt_cmd *mcmd;
4466         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4467         struct qla_qpair_hint *h = &vha->vha_tgt.qla_tgt->qphints[0];
4468
4469         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4470         if (!mcmd) {
4471                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
4472                     "qla_target(%d): Allocation of management "
4473                     "command failed, some commands and their data could "
4474                     "leak\n", vha->vp_idx);
4475                 return -ENOMEM;
4476         }
4477         memset(mcmd, 0, sizeof(*mcmd));
4478         mcmd->sess = sess;
4479
4480         if (iocb) {
4481                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4482                     sizeof(mcmd->orig_iocb.imm_ntfy));
4483         }
4484         mcmd->tmr_func = fn;
4485         mcmd->flags = flags;
4486         mcmd->reset_count = ha->base_qpair->chip_reset;
4487         mcmd->qpair = h->qpair;
4488         mcmd->vha = vha;
4489         mcmd->se_cmd.cpuid = h->cpuid;
4490         mcmd->unpacked_lun = lun;
4491
4492         switch (fn) {
4493         case QLA_TGT_LUN_RESET:
4494         case QLA_TGT_CLEAR_TS:
4495         case QLA_TGT_ABORT_TS:
4496                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
4497                 fallthrough;
4498         case QLA_TGT_CLEAR_ACA:
4499                 h = qlt_find_qphint(vha, mcmd->unpacked_lun);
4500                 mcmd->qpair = h->qpair;
4501                 mcmd->se_cmd.cpuid = h->cpuid;
4502                 break;
4503
4504         case QLA_TGT_TARGET_RESET:
4505         case QLA_TGT_NEXUS_LOSS_SESS:
4506         case QLA_TGT_NEXUS_LOSS:
4507         case QLA_TGT_ABORT_ALL:
4508         default:
4509                 /* no-op */
4510                 break;
4511         }
4512
4513         INIT_WORK(&mcmd->work, qlt_do_tmr_work);
4514         queue_work_on(mcmd->se_cmd.cpuid, qla_tgt_wq,
4515             &mcmd->work);
4516
4517         return 0;
4518 }
4519
4520 /* ha->hardware_lock supposed to be held on entry */
4521 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
4522 {
4523         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4524         struct qla_hw_data *ha = vha->hw;
4525         struct fc_port *sess;
4526         u64 unpacked_lun;
4527         int fn;
4528         unsigned long flags;
4529
4530         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4531
4532         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4533         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4534             a->u.isp24.fcp_hdr.s_id);
4535         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4536
4537         unpacked_lun =
4538             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4539
4540         if (sess == NULL || sess->deleted)
4541                 return -EFAULT;
4542
4543         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4544 }
4545
4546 /* ha->hardware_lock supposed to be held on entry */
4547 static int __qlt_abort_task(struct scsi_qla_host *vha,
4548         struct imm_ntfy_from_isp *iocb, struct fc_port *sess)
4549 {
4550         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
4551         struct qla_hw_data *ha = vha->hw;
4552         struct qla_tgt_mgmt_cmd *mcmd;
4553         u64 unpacked_lun;
4554         int rc;
4555
4556         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
4557         if (mcmd == NULL) {
4558                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
4559                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
4560                     vha->vp_idx, __func__);
4561                 return -ENOMEM;
4562         }
4563         memset(mcmd, 0, sizeof(*mcmd));
4564
4565         mcmd->sess = sess;
4566         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
4567             sizeof(mcmd->orig_iocb.imm_ntfy));
4568
4569         unpacked_lun =
4570             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
4571         mcmd->reset_count = ha->base_qpair->chip_reset;
4572         mcmd->tmr_func = QLA_TGT_2G_ABORT_TASK;
4573         mcmd->qpair = ha->base_qpair;
4574
4575         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, mcmd->tmr_func,
4576             le16_to_cpu(iocb->u.isp2x.seq_id));
4577         if (rc != 0) {
4578                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
4579                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
4580                     vha->vp_idx, rc);
4581                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
4582                 return -EFAULT;
4583         }
4584
4585         return 0;
4586 }
4587
4588 /* ha->hardware_lock supposed to be held on entry */
4589 static int qlt_abort_task(struct scsi_qla_host *vha,
4590         struct imm_ntfy_from_isp *iocb)
4591 {
4592         struct qla_hw_data *ha = vha->hw;
4593         struct fc_port *sess;
4594         int loop_id;
4595         unsigned long flags;
4596
4597         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4598
4599         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
4600         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4601         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
4602
4603         if (sess == NULL) {
4604                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4605                     "qla_target(%d): task abort for unexisting "
4606                     "session\n", vha->vp_idx);
4607                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4608                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4609         }
4610
4611         return __qlt_abort_task(vha, iocb, sess);
4612 }
4613
4614 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4615 {
4616         if (rc != MBS_COMMAND_COMPLETE) {
4617                 ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4618                         "%s: se_sess %p / sess %p from"
4619                         " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4620                         " LOGO failed: %#x\n",
4621                         __func__,
4622                         fcport->se_sess,
4623                         fcport,
4624                         fcport->port_name, fcport->loop_id,
4625                         fcport->d_id.b.domain, fcport->d_id.b.area,
4626                         fcport->d_id.b.al_pa, rc);
4627         }
4628
4629         fcport->logout_completed = 1;
4630 }
4631
4632 /*
4633 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4634 *
4635 * Schedules sessions with matching port_id/loop_id but different wwn for
4636 * deletion. Returns existing session with matching wwn if present.
4637 * Null otherwise.
4638 */
4639 struct fc_port *
4640 qlt_find_sess_invalidate_other(scsi_qla_host_t *vha, uint64_t wwn,
4641     port_id_t port_id, uint16_t loop_id, struct fc_port **conflict_sess)
4642 {
4643         struct fc_port *sess = NULL, *other_sess;
4644         uint64_t other_wwn;
4645
4646         *conflict_sess = NULL;
4647
4648         list_for_each_entry(other_sess, &vha->vp_fcports, list) {
4649
4650                 other_wwn = wwn_to_u64(other_sess->port_name);
4651
4652                 if (wwn == other_wwn) {
4653                         WARN_ON(sess);
4654                         sess = other_sess;
4655                         continue;
4656                 }
4657
4658                 /* find other sess with nport_id collision */
4659                 if (port_id.b24 == other_sess->d_id.b24) {
4660                         if (loop_id != other_sess->loop_id) {
4661                                 ql_dbg(ql_dbg_disc, vha, 0x1000c,
4662                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4663                                     other_sess, other_sess->loop_id, other_wwn);
4664
4665                                 /*
4666                                  * logout_on_delete is set by default, but another
4667                                  * session that has the same s_id/loop_id combo
4668                                  * might have cleared it when requested this session
4669                                  * deletion, so don't touch it
4670                                  */
4671                                 qlt_schedule_sess_for_deletion(other_sess);
4672                         } else {
4673                                 /*
4674                                  * Another wwn used to have our s_id/loop_id
4675                                  * kill the session, but don't free the loop_id
4676                                  */
4677                                 ql_dbg(ql_dbg_disc, vha, 0xf01b,
4678                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4679                                     other_sess, other_sess->loop_id, other_wwn);
4680
4681                                 other_sess->keep_nport_handle = 1;
4682                                 if (other_sess->disc_state != DSC_DELETED)
4683                                         *conflict_sess = other_sess;
4684                                 qlt_schedule_sess_for_deletion(other_sess);
4685                         }
4686                         continue;
4687                 }
4688
4689                 /* find other sess with nport handle collision */
4690                 if ((loop_id == other_sess->loop_id) &&
4691                         (loop_id != FC_NO_LOOP_ID)) {
4692                         ql_dbg(ql_dbg_disc, vha, 0x1000d,
4693                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4694                                other_sess, other_sess->loop_id, other_wwn);
4695
4696                         /* Same loop_id but different s_id
4697                          * Ok to kill and logout */
4698                         qlt_schedule_sess_for_deletion(other_sess);
4699                 }
4700         }
4701
4702         return sess;
4703 }
4704
4705 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4706 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4707 {
4708         struct qla_tgt_sess_op *op;
4709         struct qla_tgt_cmd *cmd;
4710         uint32_t key;
4711         int count = 0;
4712         unsigned long flags;
4713
4714         key = (((u32)s_id->b.domain << 16) |
4715                ((u32)s_id->b.area   <<  8) |
4716                ((u32)s_id->b.al_pa));
4717
4718         spin_lock_irqsave(&vha->cmd_list_lock, flags);
4719         list_for_each_entry(op, &vha->unknown_atio_list, cmd_list) {
4720                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4721
4722                 if (op_key == key) {
4723                         op->aborted = true;
4724                         count++;
4725                 }
4726         }
4727
4728         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4729                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4730
4731                 if (cmd_key == key) {
4732                         cmd->aborted = 1;
4733                         count++;
4734                 }
4735         }
4736         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
4737
4738         return count;
4739 }
4740
4741 static int qlt_handle_login(struct scsi_qla_host *vha,
4742     struct imm_ntfy_from_isp *iocb)
4743 {
4744         struct fc_port *sess = NULL, *conflict_sess = NULL;
4745         uint64_t wwn;
4746         port_id_t port_id;
4747         uint16_t loop_id, wd3_lo;
4748         int res = 0;
4749         struct qlt_plogi_ack_t *pla;
4750         unsigned long flags;
4751
4752         lockdep_assert_held(&vha->hw->hardware_lock);
4753
4754         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4755
4756         port_id.b.domain = iocb->u.isp24.port_id[2];
4757         port_id.b.area   = iocb->u.isp24.port_id[1];
4758         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4759         port_id.b.rsvd_1 = 0;
4760
4761         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4762
4763         /* Mark all stale commands sitting in qla_tgt_wq for deletion */
4764         abort_cmds_for_s_id(vha, &port_id);
4765
4766         if (wwn) {
4767                 spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
4768                 sess = qlt_find_sess_invalidate_other(vha, wwn,
4769                     port_id, loop_id, &conflict_sess);
4770                 spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
4771         } else {
4772                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4773                     "%s %d Term INOT due to WWN=0 lid=%d, NportID %06X ",
4774                     __func__, __LINE__, loop_id, port_id.b24);
4775                 qlt_send_term_imm_notif(vha, iocb, 1);
4776                 goto out;
4777         }
4778
4779         if (IS_SW_RESV_ADDR(port_id)) {
4780                 res = 1;
4781                 goto out;
4782         }
4783
4784         if (vha->hw->flags.edif_enabled &&
4785             !(vha->e_dbell.db_flags & EDB_ACTIVE) &&
4786             iocb->u.isp24.status_subcode == ELS_PLOGI &&
4787             !(le16_to_cpu(iocb->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
4788                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4789                         "%s %d Term INOT due to app not available lid=%d, NportID %06X ",
4790                         __func__, __LINE__, loop_id, port_id.b24);
4791                 qlt_send_term_imm_notif(vha, iocb, 1);
4792                 goto out;
4793         }
4794
4795         if (vha->hw->flags.edif_enabled) {
4796                 if (DBELL_INACTIVE(vha)) {
4797                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4798                                "%s %d Term INOT due to app not started lid=%d, NportID %06X ",
4799                                __func__, __LINE__, loop_id, port_id.b24);
4800                         qlt_send_term_imm_notif(vha, iocb, 1);
4801                         goto out;
4802                 } else if (iocb->u.isp24.status_subcode == ELS_PLOGI &&
4803                            !(le16_to_cpu(iocb->u.isp24.flags) & NOTIFY24XX_FLAGS_FCSP)) {
4804                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4805                                "%s %d Term INOT due to unsecure lid=%d, NportID %06X ",
4806                                __func__, __LINE__, loop_id, port_id.b24);
4807                         qlt_send_term_imm_notif(vha, iocb, 1);
4808                         goto out;
4809                 }
4810         }
4811
4812         pla = qlt_plogi_ack_find_add(vha, &port_id, iocb);
4813         if (!pla) {
4814                 ql_dbg(ql_dbg_disc + ql_dbg_verbose, vha, 0xffff,
4815                     "%s %d %8phC Term INOT due to mem alloc fail",
4816                     __func__, __LINE__,
4817                     iocb->u.isp24.port_name);
4818                 qlt_send_term_imm_notif(vha, iocb, 1);
4819                 goto out;
4820         }
4821
4822         if (conflict_sess) {
4823                 conflict_sess->login_gen++;
4824                 qlt_plogi_ack_link(vha, pla, conflict_sess,
4825                     QLT_PLOGI_LINK_CONFLICT);
4826         }
4827
4828         if (!sess) {
4829                 pla->ref_count++;
4830                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4831                     "%s %d %8phC post new sess\n",
4832                     __func__, __LINE__, iocb->u.isp24.port_name);
4833                 if (iocb->u.isp24.status_subcode == ELS_PLOGI)
4834                         qla24xx_post_newsess_work(vha, &port_id,
4835                             iocb->u.isp24.port_name,
4836                             iocb->u.isp24.u.plogi.node_name,
4837                             pla, 0);
4838                 else
4839                         qla24xx_post_newsess_work(vha, &port_id,
4840                             iocb->u.isp24.port_name, NULL,
4841                             pla, 0);
4842
4843                 goto out;
4844         }
4845
4846         if (sess->disc_state == DSC_UPD_FCPORT) {
4847                 u16 sec;
4848
4849                 /*
4850                  * Remote port registration is still going on from
4851                  * previous login. Allow it to finish before we
4852                  * accept the new login.
4853                  */
4854                 sess->next_disc_state = DSC_DELETE_PEND;
4855                 sec = jiffies_to_msecs(jiffies -
4856                     sess->jiffies_at_registration) / 1000;
4857                 if (sess->sec_since_registration < sec && sec &&
4858                     !(sec % 5)) {
4859                         sess->sec_since_registration = sec;
4860                         ql_dbg(ql_dbg_disc, vha, 0xffff,
4861                             "%s %8phC - Slow Rport registration (%d Sec)\n",
4862                             __func__, sess->port_name, sec);
4863                 }
4864
4865                 if (!conflict_sess) {
4866                         list_del(&pla->list);
4867                         kmem_cache_free(qla_tgt_plogi_cachep, pla);
4868                 }
4869
4870                 qlt_send_term_imm_notif(vha, iocb, 1);
4871                 goto out;
4872         }
4873
4874         qlt_plogi_ack_link(vha, pla, sess, QLT_PLOGI_LINK_SAME_WWN);
4875         sess->d_id = port_id;
4876         sess->login_gen++;
4877         sess->loop_id = loop_id;
4878
4879         if (iocb->u.isp24.status_subcode == ELS_PLOGI) {
4880                 /* remote port has assigned Port ID */
4881                 if (N2N_TOPO(vha->hw) && fcport_is_bigger(sess))
4882                         vha->d_id = sess->d_id;
4883
4884                 ql_dbg(ql_dbg_disc, vha, 0xffff,
4885                     "%s %8phC - send port online\n",
4886                     __func__, sess->port_name);
4887
4888                 qla2x00_post_aen_work(vha, FCH_EVT_PORT_ONLINE,
4889                     sess->d_id.b24);
4890         }
4891
4892         if (iocb->u.isp24.status_subcode == ELS_PRLI) {
4893                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4894                 sess->local = 0;
4895                 sess->loop_id = loop_id;
4896                 sess->d_id = port_id;
4897                 sess->fw_login_state = DSC_LS_PRLI_PEND;
4898                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4899
4900                 if (wd3_lo & BIT_7)
4901                         sess->conf_compl_supported = 1;
4902
4903                 if ((wd3_lo & BIT_4) == 0)
4904                         sess->port_type = FCT_INITIATOR;
4905                 else
4906                         sess->port_type = FCT_TARGET;
4907
4908         } else
4909                 sess->fw_login_state = DSC_LS_PLOGI_PEND;
4910
4911
4912         ql_dbg(ql_dbg_disc, vha, 0x20f9,
4913             "%s %d %8phC  DS %d\n",
4914             __func__, __LINE__, sess->port_name, sess->disc_state);
4915
4916         switch (sess->disc_state) {
4917         case DSC_DELETED:
4918         case DSC_LOGIN_PEND:
4919                 qlt_plogi_ack_unref(vha, pla);
4920                 break;
4921
4922         default:
4923                 /*
4924                  * Under normal circumstances we want to release nport handle
4925                  * during LOGO process to avoid nport handle leaks inside FW.
4926                  * The exception is when LOGO is done while another PLOGI with
4927                  * the same nport handle is waiting as might be the case here.
4928                  * Note: there is always a possibily of a race where session
4929                  * deletion has already started for other reasons (e.g. ACL
4930                  * removal) and now PLOGI arrives:
4931                  * 1. if PLOGI arrived in FW after nport handle has been freed,
4932                  *    FW must have assigned this PLOGI a new/same handle and we
4933                  *    can proceed ACK'ing it as usual when session deletion
4934                  *    completes.
4935                  * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4936                  *    bit reached it, the handle has now been released. We'll
4937                  *    get an error when we ACK this PLOGI. Nothing will be sent
4938                  *    back to initiator. Initiator should eventually retry
4939                  *    PLOGI and situation will correct itself.
4940                  */
4941                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4942                     (sess->d_id.b24 == port_id.b24));
4943
4944                 ql_dbg(ql_dbg_disc, vha, 0x20f9,
4945                     "%s %d %8phC post del sess\n",
4946                     __func__, __LINE__, sess->port_name);
4947
4948
4949                 qlt_schedule_sess_for_deletion(sess);
4950                 break;
4951         }
4952 out:
4953         return res;
4954 }
4955
4956 /*
4957  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4958  */
4959 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4960         struct imm_ntfy_from_isp *iocb)
4961 {
4962         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4963         struct qla_hw_data *ha = vha->hw;
4964         struct fc_port *sess = NULL, *conflict_sess = NULL;
4965         uint64_t wwn;
4966         port_id_t port_id;
4967         uint16_t loop_id;
4968         uint16_t wd3_lo;
4969         int res = 0;
4970         unsigned long flags;
4971
4972         lockdep_assert_held(&ha->hardware_lock);
4973
4974         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4975
4976         port_id.b.domain = iocb->u.isp24.port_id[2];
4977         port_id.b.area   = iocb->u.isp24.port_id[1];
4978         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4979         port_id.b.rsvd_1 = 0;
4980
4981         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4982
4983         ql_dbg(ql_dbg_disc, vha, 0xf026,
4984             "qla_target(%d): Port ID: %02x:%02x:%02x ELS opcode: 0x%02x lid %d %8phC\n",
4985             vha->vp_idx, iocb->u.isp24.port_id[2],
4986                 iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[0],
4987                    iocb->u.isp24.status_subcode, loop_id,
4988                 iocb->u.isp24.port_name);
4989
4990         /* res = 1 means ack at the end of thread
4991          * res = 0 means ack async/later.
4992          */
4993         switch (iocb->u.isp24.status_subcode) {
4994         case ELS_PLOGI:
4995                 res = qlt_handle_login(vha, iocb);
4996                 break;
4997
4998         case ELS_PRLI:
4999                 if (N2N_TOPO(ha)) {
5000                         sess = qla2x00_find_fcport_by_wwpn(vha,
5001                             iocb->u.isp24.port_name, 1);
5002
5003                         if (vha->hw->flags.edif_enabled && sess &&
5004                             (!(sess->flags & FCF_FCSP_DEVICE) ||
5005                              !sess->edif.authok)) {
5006                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5007                                        "%s %d %8phC Term PRLI due to unauthorize PRLI\n",
5008                                        __func__, __LINE__, iocb->u.isp24.port_name);
5009                                 qlt_send_term_imm_notif(vha, iocb, 1);
5010                                 break;
5011                         }
5012
5013                         if (sess && sess->plogi_link[QLT_PLOGI_LINK_SAME_WWN]) {
5014                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5015                                     "%s %d %8phC Term PRLI due to PLOGI ACK not completed\n",
5016                                     __func__, __LINE__,
5017                                     iocb->u.isp24.port_name);
5018                                 qlt_send_term_imm_notif(vha, iocb, 1);
5019                                 break;
5020                         }
5021
5022                         res = qlt_handle_login(vha, iocb);
5023                         break;
5024                 }
5025
5026                 if (IS_SW_RESV_ADDR(port_id)) {
5027                         res = 1;
5028                         break;
5029                 }
5030
5031                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
5032
5033                 if (wwn) {
5034                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5035                         sess = qlt_find_sess_invalidate_other(vha, wwn, port_id,
5036                                 loop_id, &conflict_sess);
5037                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5038                 }
5039
5040                 if (conflict_sess) {
5041                         switch (conflict_sess->disc_state) {
5042                         case DSC_DELETED:
5043                         case DSC_DELETE_PEND:
5044                                 break;
5045                         default:
5046                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf09b,
5047                                     "PRLI with conflicting sess %p port %8phC\n",
5048                                     conflict_sess, conflict_sess->port_name);
5049                                 conflict_sess->fw_login_state =
5050                                     DSC_LS_PORT_UNAVAIL;
5051                                 qlt_send_term_imm_notif(vha, iocb, 1);
5052                                 res = 0;
5053                                 break;
5054                         }
5055                 }
5056
5057                 if (sess != NULL) {
5058                         bool delete = false;
5059                         int sec;
5060
5061                         if (vha->hw->flags.edif_enabled && sess &&
5062                             (!(sess->flags & FCF_FCSP_DEVICE) ||
5063                              !sess->edif.authok)) {
5064                                 ql_dbg(ql_dbg_disc, vha, 0xffff,
5065                                        "%s %d %8phC Term PRLI due to unauthorize prli\n",
5066                                        __func__, __LINE__, iocb->u.isp24.port_name);
5067                                 qlt_send_term_imm_notif(vha, iocb, 1);
5068                                 break;
5069                         }
5070
5071                         spin_lock_irqsave(&tgt->ha->tgt.sess_lock, flags);
5072                         switch (sess->fw_login_state) {
5073                         case DSC_LS_PLOGI_PEND:
5074                         case DSC_LS_PLOGI_COMP:
5075                         case DSC_LS_PRLI_COMP:
5076                                 break;
5077                         default:
5078                                 delete = true;
5079                                 break;
5080                         }
5081
5082                         switch (sess->disc_state) {
5083                         case DSC_UPD_FCPORT:
5084                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5085                                     flags);
5086
5087                                 sec = jiffies_to_msecs(jiffies -
5088                                     sess->jiffies_at_registration)/1000;
5089                                 if (sess->sec_since_registration < sec && sec &&
5090                                     !(sec % 5)) {
5091                                         sess->sec_since_registration = sec;
5092                                         ql_dbg(ql_dbg_disc, sess->vha, 0xffff,
5093                                             "%s %8phC : Slow Rport registration(%d Sec)\n",
5094                                             __func__, sess->port_name, sec);
5095                                 }
5096                                 qlt_send_term_imm_notif(vha, iocb, 1);
5097                                 return 0;
5098
5099                         case DSC_LOGIN_PEND:
5100                         case DSC_GPDB:
5101                         case DSC_LOGIN_COMPLETE:
5102                         case DSC_ADISC:
5103                                 delete = false;
5104                                 break;
5105                         default:
5106                                 break;
5107                         }
5108
5109                         if (delete) {
5110                                 spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock,
5111                                     flags);
5112                                 /*
5113                                  * Impatient initiator sent PRLI before last
5114                                  * PLOGI could finish. Will force him to re-try,
5115                                  * while last one finishes.
5116                                  */
5117                                 ql_log(ql_log_warn, sess->vha, 0xf095,
5118                                     "sess %p PRLI received, before plogi ack.\n",
5119                                     sess);
5120                                 qlt_send_term_imm_notif(vha, iocb, 1);
5121                                 res = 0;
5122                                 break;
5123                         }
5124
5125                         /*
5126                          * This shouldn't happen under normal circumstances,
5127                          * since we have deleted the old session during PLOGI
5128                          */
5129                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
5130                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
5131                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
5132
5133                         sess->local = 0;
5134                         sess->loop_id = loop_id;
5135                         sess->d_id = port_id;
5136                         sess->fw_login_state = DSC_LS_PRLI_PEND;
5137
5138                         if (wd3_lo & BIT_7)
5139                                 sess->conf_compl_supported = 1;
5140
5141                         if ((wd3_lo & BIT_4) == 0)
5142                                 sess->port_type = FCT_INITIATOR;
5143                         else
5144                                 sess->port_type = FCT_TARGET;
5145
5146                         spin_unlock_irqrestore(&tgt->ha->tgt.sess_lock, flags);
5147                 }
5148                 res = 1; /* send notify ack */
5149
5150                 /* Make session global (not used in fabric mode) */
5151                 if (ha->current_topology != ISP_CFG_F) {
5152                         if (sess) {
5153                                 ql_dbg(ql_dbg_disc, vha, 0x20fa,
5154                                     "%s %d %8phC post nack\n",
5155                                     __func__, __LINE__, sess->port_name);
5156                                 qla24xx_post_nack_work(vha, sess, iocb,
5157                                         SRB_NACK_PRLI);
5158                                 res = 0;
5159                         } else {
5160                                 set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
5161                                 set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
5162                                 qla2xxx_wake_dpc(vha);
5163                         }
5164                 } else {
5165                         if (sess) {
5166                                 ql_dbg(ql_dbg_disc, vha, 0x20fb,
5167                                     "%s %d %8phC post nack\n",
5168                                     __func__, __LINE__, sess->port_name);
5169                                 qla24xx_post_nack_work(vha, sess, iocb,
5170                                         SRB_NACK_PRLI);
5171                                 res = 0;
5172                         }
5173                 }
5174                 break;
5175
5176         case ELS_TPRLO:
5177                 if (le16_to_cpu(iocb->u.isp24.flags) &
5178                         NOTIFY24XX_FLAGS_GLOBAL_TPRLO) {
5179                         loop_id = 0xFFFF;
5180                         qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS);
5181                         res = 1;
5182                         break;
5183                 }
5184                 fallthrough;
5185         case ELS_LOGO:
5186         case ELS_PRLO:
5187                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5188                 sess = qla2x00_find_fcport_by_loopid(vha, loop_id);
5189                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5190
5191                 if (sess) {
5192                         sess->login_gen++;
5193                         sess->fw_login_state = DSC_LS_LOGO_PEND;
5194                         sess->logo_ack_needed = 1;
5195                         memcpy(sess->iocb, iocb, IOCB_SIZE);
5196                 }
5197
5198                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5199
5200                 ql_dbg(ql_dbg_disc, vha, 0x20fc,
5201                     "%s: logo %llx res %d sess %p ",
5202                     __func__, wwn, res, sess);
5203                 if (res == 0) {
5204                         /*
5205                          * cmd went upper layer, look for qlt_xmit_tm_rsp()
5206                          * for LOGO_ACK & sess delete
5207                          */
5208                         BUG_ON(!sess);
5209                         res = 0;
5210                 } else {
5211                         /* cmd did not go to upper layer. */
5212                         if (sess) {
5213                                 qlt_schedule_sess_for_deletion(sess);
5214                                 res = 0;
5215                         }
5216                         /* else logo will be ack */
5217                 }
5218                 break;
5219         case ELS_PDISC:
5220         case ELS_ADISC:
5221         {
5222                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5223
5224                 if (tgt->link_reinit_iocb_pending) {
5225                         qlt_send_notify_ack(ha->base_qpair,
5226                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5227                         tgt->link_reinit_iocb_pending = 0;
5228                 }
5229
5230                 sess = qla2x00_find_fcport_by_wwpn(vha,
5231                     iocb->u.isp24.port_name, 1);
5232                 if (sess) {
5233                         ql_dbg(ql_dbg_disc, vha, 0x20fd,
5234                                 "sess %p lid %d|%d DS %d LS %d\n",
5235                                 sess, sess->loop_id, loop_id,
5236                                 sess->disc_state, sess->fw_login_state);
5237                 }
5238
5239                 res = 1; /* send notify ack */
5240                 break;
5241         }
5242
5243         case ELS_FLOGI: /* should never happen */
5244         default:
5245                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
5246                     "qla_target(%d): Unsupported ELS command %x "
5247                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
5248                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
5249                 break;
5250         }
5251
5252         ql_dbg(ql_dbg_disc, vha, 0xf026,
5253             "qla_target(%d): Exit ELS opcode: 0x%02x res %d\n",
5254             vha->vp_idx, iocb->u.isp24.status_subcode, res);
5255
5256         return res;
5257 }
5258
5259 /*
5260  * ha->hardware_lock supposed to be held on entry.
5261  * Might drop it, then reacquire.
5262  */
5263 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
5264         struct imm_ntfy_from_isp *iocb)
5265 {
5266         struct qla_hw_data *ha = vha->hw;
5267         uint32_t add_flags = 0;
5268         int send_notify_ack = 1;
5269         uint16_t status;
5270
5271         lockdep_assert_held(&ha->hardware_lock);
5272
5273         status = le16_to_cpu(iocb->u.isp2x.status);
5274         switch (status) {
5275         case IMM_NTFY_LIP_RESET:
5276         {
5277                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
5278                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
5279                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
5280                     iocb->u.isp24.status_subcode);
5281
5282                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5283                         send_notify_ack = 0;
5284                 break;
5285         }
5286
5287         case IMM_NTFY_LIP_LINK_REINIT:
5288         {
5289                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5290
5291                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
5292                     "qla_target(%d): LINK REINIT (loop %#x, "
5293                     "subcode %x)\n", vha->vp_idx,
5294                     le16_to_cpu(iocb->u.isp24.nport_handle),
5295                     iocb->u.isp24.status_subcode);
5296                 if (tgt->link_reinit_iocb_pending) {
5297                         qlt_send_notify_ack(ha->base_qpair,
5298                             &tgt->link_reinit_iocb, 0, 0, 0, 0, 0, 0);
5299                 }
5300                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
5301                 tgt->link_reinit_iocb_pending = 1;
5302                 /*
5303                  * QLogic requires to wait after LINK REINIT for possible
5304                  * PDISC or ADISC ELS commands
5305                  */
5306                 send_notify_ack = 0;
5307                 break;
5308         }
5309
5310         case IMM_NTFY_PORT_LOGOUT:
5311                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
5312                     "qla_target(%d): Port logout (loop "
5313                     "%#x, subcode %x)\n", vha->vp_idx,
5314                     le16_to_cpu(iocb->u.isp24.nport_handle),
5315                     iocb->u.isp24.status_subcode);
5316
5317                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
5318                         send_notify_ack = 0;
5319                 /* The sessions will be cleared in the callback, if needed */
5320                 break;
5321
5322         case IMM_NTFY_GLBL_TPRLO:
5323                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
5324                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
5325                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5326                         send_notify_ack = 0;
5327                 /* The sessions will be cleared in the callback, if needed */
5328                 break;
5329
5330         case IMM_NTFY_PORT_CONFIG:
5331                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
5332                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
5333                     status);
5334                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
5335                         send_notify_ack = 0;
5336                 /* The sessions will be cleared in the callback, if needed */
5337                 break;
5338
5339         case IMM_NTFY_GLBL_LOGO:
5340                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
5341                     "qla_target(%d): Link failure detected\n",
5342                     vha->vp_idx);
5343                 /* I_T nexus loss */
5344                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
5345                         send_notify_ack = 0;
5346                 break;
5347
5348         case IMM_NTFY_IOCB_OVERFLOW:
5349                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
5350                     "qla_target(%d): Cannot provide requested "
5351                     "capability (IOCB overflowed the immediate notify "
5352                     "resource count)\n", vha->vp_idx);
5353                 break;
5354
5355         case IMM_NTFY_ABORT_TASK:
5356                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
5357                     "qla_target(%d): Abort Task (S %08x I %#x -> "
5358                     "L %#x)\n", vha->vp_idx,
5359                     le16_to_cpu(iocb->u.isp2x.seq_id),
5360                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
5361                     le16_to_cpu(iocb->u.isp2x.lun));
5362                 if (qlt_abort_task(vha, iocb) == 0)
5363                         send_notify_ack = 0;
5364                 break;
5365
5366         case IMM_NTFY_RESOURCE:
5367                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
5368                     "qla_target(%d): Out of resources, host %ld\n",
5369                     vha->vp_idx, vha->host_no);
5370                 break;
5371
5372         case IMM_NTFY_MSG_RX:
5373                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
5374                     "qla_target(%d): Immediate notify task %x\n",
5375                     vha->vp_idx, iocb->u.isp2x.task_flags);
5376                 break;
5377
5378         case IMM_NTFY_ELS:
5379                 if (qlt_24xx_handle_els(vha, iocb) == 0)
5380                         send_notify_ack = 0;
5381                 break;
5382         default:
5383                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
5384                     "qla_target(%d): Received unknown immediate "
5385                     "notify status %x\n", vha->vp_idx, status);
5386                 break;
5387         }
5388
5389         if (send_notify_ack)
5390                 qlt_send_notify_ack(ha->base_qpair, iocb, add_flags, 0, 0, 0,
5391                     0, 0);
5392 }
5393
5394 /*
5395  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5396  * This function sends busy to ISP 2xxx or 24xx.
5397  */
5398 static int __qlt_send_busy(struct qla_qpair *qpair,
5399         struct atio_from_isp *atio, uint16_t status)
5400 {
5401         struct scsi_qla_host *vha = qpair->vha;
5402         struct ctio7_to_24xx *ctio24;
5403         struct qla_hw_data *ha = vha->hw;
5404         request_t *pkt;
5405         struct fc_port *sess = NULL;
5406         unsigned long flags;
5407         u16 temp;
5408         port_id_t id;
5409
5410         id = be_to_port_id(atio->u.isp24.fcp_hdr.s_id);
5411
5412         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
5413         sess = qla2x00_find_fcport_by_nportid(vha, &id, 1);
5414         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
5415         if (!sess) {
5416                 qlt_send_term_exchange(qpair, NULL, atio, 1, 0);
5417                 return 0;
5418         }
5419         /* Sending marker isn't necessary, since we called from ISR */
5420
5421         pkt = (request_t *)__qla2x00_alloc_iocbs(qpair, NULL);
5422         if (!pkt) {
5423                 ql_dbg(ql_dbg_io, vha, 0x3063,
5424                     "qla_target(%d): %s failed: unable to allocate "
5425                     "request packet", vha->vp_idx, __func__);
5426                 return -ENOMEM;
5427         }
5428
5429         qpair->tgt_counters.num_q_full_sent++;
5430         pkt->entry_count = 1;
5431         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
5432
5433         ctio24 = (struct ctio7_to_24xx *)pkt;
5434         ctio24->entry_type = CTIO_TYPE7;
5435         ctio24->nport_handle = cpu_to_le16(sess->loop_id);
5436         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
5437         ctio24->vp_index = vha->vp_idx;
5438         ctio24->initiator_id = be_id_to_le(atio->u.isp24.fcp_hdr.s_id);
5439         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
5440         temp = (atio->u.isp24.attr << 9) |
5441                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
5442                 CTIO7_FLAGS_DONT_RET_CTIO;
5443         ctio24->u.status1.flags = cpu_to_le16(temp);
5444         /*
5445          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
5446          * if the explicit conformation is used.
5447          */
5448         ctio24->u.status1.ox_id =
5449                 cpu_to_le16(be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
5450         ctio24->u.status1.scsi_status = cpu_to_le16(status);
5451
5452         ctio24->u.status1.residual = cpu_to_le32(get_datalen_for_atio(atio));
5453
5454         if (ctio24->u.status1.residual != 0)
5455                 ctio24->u.status1.scsi_status |= cpu_to_le16(SS_RESIDUAL_UNDER);
5456
5457         /* Memory Barrier */
5458         wmb();
5459         if (qpair->reqq_start_iocbs)
5460                 qpair->reqq_start_iocbs(qpair);
5461         else
5462                 qla2x00_start_iocbs(vha, qpair->req);
5463         return 0;
5464 }
5465
5466 /*
5467  * This routine is used to allocate a command for either a QFull condition
5468  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
5469  * out previously.
5470  */
5471 static void
5472 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
5473         struct atio_from_isp *atio, uint16_t status, int qfull)
5474 {
5475         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5476         struct qla_hw_data *ha = vha->hw;
5477         struct fc_port *sess;
5478         struct qla_tgt_cmd *cmd;
5479         unsigned long flags;
5480
5481         if (unlikely(tgt->tgt_stop)) {
5482                 ql_dbg(ql_dbg_io, vha, 0x300a,
5483                         "New command while device %p is shutting down\n", tgt);
5484                 return;
5485         }
5486
5487         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
5488                 vha->hw->tgt.num_qfull_cmds_dropped++;
5489                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5490                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5491                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5492                                 vha->hw->tgt.num_qfull_cmds_dropped;
5493
5494                 ql_dbg(ql_dbg_io, vha, 0x3068,
5495                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
5496                         vha->vp_idx, __func__,
5497                         vha->hw->tgt.num_qfull_cmds_dropped);
5498
5499                 qlt_chk_exch_leak_thresh_hold(vha);
5500                 return;
5501         }
5502
5503         sess = ha->tgt.tgt_ops->find_sess_by_s_id
5504                 (vha, atio->u.isp24.fcp_hdr.s_id);
5505         if (!sess)
5506                 return;
5507
5508         cmd = ha->tgt.tgt_ops->get_cmd(sess);
5509         if (!cmd) {
5510                 ql_dbg(ql_dbg_io, vha, 0x3009,
5511                         "qla_target(%d): %s: Allocation of cmd failed\n",
5512                         vha->vp_idx, __func__);
5513
5514                 vha->hw->tgt.num_qfull_cmds_dropped++;
5515                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5516                         vha->qla_stats.stat_max_qfull_cmds_dropped)
5517                         vha->qla_stats.stat_max_qfull_cmds_dropped =
5518                                 vha->hw->tgt.num_qfull_cmds_dropped;
5519
5520                 qlt_chk_exch_leak_thresh_hold(vha);
5521                 return;
5522         }
5523
5524         qlt_incr_num_pend_cmds(vha);
5525         INIT_LIST_HEAD(&cmd->cmd_list);
5526         memcpy(&cmd->atio, atio, sizeof(*atio));
5527
5528         cmd->tgt = vha->vha_tgt.qla_tgt;
5529         cmd->vha = vha;
5530         cmd->reset_count = ha->base_qpair->chip_reset;
5531         cmd->q_full = 1;
5532         cmd->qpair = ha->base_qpair;
5533
5534         if (qfull) {
5535                 cmd->q_full = 1;
5536                 /* NOTE: borrowing the state field to carry the status */
5537                 cmd->state = status;
5538         } else
5539                 cmd->term_exchg = 1;
5540
5541         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5542         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5543
5544         vha->hw->tgt.num_qfull_cmds_alloc++;
5545         if (vha->hw->tgt.num_qfull_cmds_alloc >
5546                 vha->qla_stats.stat_max_qfull_cmds_alloc)
5547                 vha->qla_stats.stat_max_qfull_cmds_alloc =
5548                         vha->hw->tgt.num_qfull_cmds_alloc;
5549         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5550 }
5551
5552 int
5553 qlt_free_qfull_cmds(struct qla_qpair *qpair)
5554 {
5555         struct scsi_qla_host *vha = qpair->vha;
5556         struct qla_hw_data *ha = vha->hw;
5557         unsigned long flags;
5558         struct qla_tgt_cmd *cmd, *tcmd;
5559         struct list_head free_list, q_full_list;
5560         int rc = 0;
5561
5562         if (list_empty(&ha->tgt.q_full_list))
5563                 return 0;
5564
5565         INIT_LIST_HEAD(&free_list);
5566         INIT_LIST_HEAD(&q_full_list);
5567
5568         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5569         if (list_empty(&ha->tgt.q_full_list)) {
5570                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5571                 return 0;
5572         }
5573
5574         list_splice_init(&vha->hw->tgt.q_full_list, &q_full_list);
5575         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5576
5577         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
5578         list_for_each_entry_safe(cmd, tcmd, &q_full_list, cmd_list) {
5579                 if (cmd->q_full)
5580                         /* cmd->state is a borrowed field to hold status */
5581                         rc = __qlt_send_busy(qpair, &cmd->atio, cmd->state);
5582                 else if (cmd->term_exchg)
5583                         rc = __qlt_send_term_exchange(qpair, NULL, &cmd->atio);
5584
5585                 if (rc == -ENOMEM)
5586                         break;
5587
5588                 if (cmd->q_full)
5589                         ql_dbg(ql_dbg_io, vha, 0x3006,
5590                             "%s: busy sent for ox_id[%04x]\n", __func__,
5591                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5592                 else if (cmd->term_exchg)
5593                         ql_dbg(ql_dbg_io, vha, 0x3007,
5594                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5595                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5596                 else
5597                         ql_dbg(ql_dbg_io, vha, 0x3008,
5598                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5599                             cmd);
5600
5601                 list_move_tail(&cmd->cmd_list, &free_list);
5602
5603                 /* piggy back on hardware_lock for protection */
5604                 vha->hw->tgt.num_qfull_cmds_alloc--;
5605         }
5606         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
5607
5608         cmd = NULL;
5609
5610         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5611                 list_del(&cmd->cmd_list);
5612                 /* This cmd was never sent to TCM.  There is no need
5613                  * to schedule free or call free_cmd
5614                  */
5615                 qlt_free_cmd(cmd);
5616         }
5617
5618         if (!list_empty(&q_full_list)) {
5619                 spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
5620                 list_splice(&q_full_list, &vha->hw->tgt.q_full_list);
5621                 spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
5622         }
5623
5624         return rc;
5625 }
5626
5627 static void
5628 qlt_send_busy(struct qla_qpair *qpair, struct atio_from_isp *atio,
5629     uint16_t status)
5630 {
5631         int rc = 0;
5632         struct scsi_qla_host *vha = qpair->vha;
5633
5634         rc = __qlt_send_busy(qpair, atio, status);
5635         if (rc == -ENOMEM)
5636                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5637 }
5638
5639 static int
5640 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha, struct qla_qpair *qpair,
5641         struct atio_from_isp *atio, uint8_t ha_locked)
5642 {
5643         struct qla_hw_data *ha = vha->hw;
5644         unsigned long flags;
5645
5646         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5647                 return 0;
5648
5649         if (!ha_locked)
5650                 spin_lock_irqsave(&ha->hardware_lock, flags);
5651         qlt_send_busy(qpair, atio, qla_sam_status);
5652         if (!ha_locked)
5653                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5654
5655         return 1;
5656 }
5657
5658 /* ha->hardware_lock supposed to be held on entry */
5659 /* called via callback from qla2xxx */
5660 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5661         struct atio_from_isp *atio, uint8_t ha_locked)
5662 {
5663         struct qla_hw_data *ha = vha->hw;
5664         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5665         int rc;
5666         unsigned long flags = 0;
5667
5668         if (unlikely(tgt == NULL)) {
5669                 ql_dbg(ql_dbg_tgt, vha, 0x3064,
5670                     "ATIO pkt, but no tgt (ha %p)", ha);
5671                 return;
5672         }
5673         /*
5674          * In tgt_stop mode we also should allow all requests to pass.
5675          * Otherwise, some commands can stuck.
5676          */
5677
5678         tgt->atio_irq_cmd_count++;
5679
5680         switch (atio->u.raw.entry_type) {
5681         case ATIO_TYPE7:
5682                 if (unlikely(atio->u.isp24.exchange_addr ==
5683                              cpu_to_le32(ATIO_EXCHANGE_ADDRESS_UNKNOWN))) {
5684                         ql_dbg(ql_dbg_io, vha, 0x3065,
5685                             "qla_target(%d): ATIO_TYPE7 "
5686                             "received with UNKNOWN exchange address, "
5687                             "sending QUEUE_FULL\n", vha->vp_idx);
5688                         if (!ha_locked)
5689                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5690                         qlt_send_busy(ha->base_qpair, atio, qla_sam_status);
5691                         if (!ha_locked)
5692                                 spin_unlock_irqrestore(&ha->hardware_lock,
5693                                     flags);
5694                         break;
5695                 }
5696
5697                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5698                         rc = qlt_chk_qfull_thresh_hold(vha, ha->base_qpair,
5699                             atio, ha_locked);
5700                         if (rc != 0) {
5701                                 tgt->atio_irq_cmd_count--;
5702                                 return;
5703                         }
5704                         rc = qlt_handle_cmd_for_atio(vha, atio);
5705                 } else {
5706                         rc = qlt_handle_task_mgmt(vha, atio);
5707                 }
5708                 if (unlikely(rc != 0)) {
5709                         if (!ha_locked)
5710                                 spin_lock_irqsave(&ha->hardware_lock, flags);
5711                         switch (rc) {
5712                         case -ENODEV:
5713                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5714                                     "qla_target: Unable to send command to target\n");
5715                                 break;
5716                         case -EBADF:
5717                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5718                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5719                                 qlt_send_term_exchange(ha->base_qpair, NULL,
5720                                     atio, 1, 0);
5721                                 break;
5722                         case -EBUSY:
5723                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5724                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5725                                     vha->vp_idx);
5726                                 qlt_send_busy(ha->base_qpair, atio,
5727                                     tc_sam_status);
5728                                 break;
5729                         default:
5730                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5731                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5732                                     vha->vp_idx);
5733                                 qlt_send_busy(ha->base_qpair, atio,
5734                                     qla_sam_status);
5735                                 break;
5736                         }
5737                         if (!ha_locked)
5738                                 spin_unlock_irqrestore(&ha->hardware_lock,
5739                                     flags);
5740                 }
5741                 break;
5742
5743         case IMMED_NOTIFY_TYPE:
5744         {
5745                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5746                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5747                             "qla_target(%d): Received ATIO packet %x "
5748                             "with error status %x\n", vha->vp_idx,
5749                             atio->u.raw.entry_type,
5750                             atio->u.isp2x.entry_status);
5751                         break;
5752                 }
5753                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5754
5755                 if (!ha_locked)
5756                         spin_lock_irqsave(&ha->hardware_lock, flags);
5757                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5758                 if (!ha_locked)
5759                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5760                 break;
5761         }
5762
5763         default:
5764                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5765                     "qla_target(%d): Received unknown ATIO atio "
5766                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5767                 break;
5768         }
5769
5770         tgt->atio_irq_cmd_count--;
5771 }
5772
5773 /*
5774  * qpair lock is assume to be held
5775  * rc = 0 : send terminate & abts respond
5776  * rc != 0: do not send term & abts respond
5777  */
5778 static int qlt_chk_unresolv_exchg(struct scsi_qla_host *vha,
5779     struct qla_qpair *qpair, struct abts_resp_from_24xx_fw *entry)
5780 {
5781         struct qla_hw_data *ha = vha->hw;
5782         int rc = 0;
5783
5784         /*
5785          * Detect unresolved exchange. If the same ABTS is unable
5786          * to terminate an existing command and the same ABTS loops
5787          * between FW & Driver, then force FW dump. Under 1 jiff,
5788          * we should see multiple loops.
5789          */
5790         if (qpair->retry_term_exchg_addr == entry->exchange_addr_to_abort &&
5791             qpair->retry_term_jiff == jiffies) {
5792                 /* found existing exchange */
5793                 qpair->retry_term_cnt++;
5794                 if (qpair->retry_term_cnt >= 5) {
5795                         rc = -EIO;
5796                         qpair->retry_term_cnt = 0;
5797                         ql_log(ql_log_warn, vha, 0xffff,
5798                             "Unable to send ABTS Respond. Dumping firmware.\n");
5799                         ql_dump_buffer(ql_dbg_tgt_mgt + ql_dbg_buffer,
5800                             vha, 0xffff, (uint8_t *)entry, sizeof(*entry));
5801
5802                         if (qpair == ha->base_qpair)
5803                                 ha->isp_ops->fw_dump(vha);
5804                         else
5805                                 qla2xxx_dump_fw(vha);
5806
5807                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5808                         qla2xxx_wake_dpc(vha);
5809                 }
5810         } else if (qpair->retry_term_jiff != jiffies) {
5811                 qpair->retry_term_exchg_addr = entry->exchange_addr_to_abort;
5812                 qpair->retry_term_cnt = 0;
5813                 qpair->retry_term_jiff = jiffies;
5814         }
5815
5816         return rc;
5817 }
5818
5819
5820 static void qlt_handle_abts_completion(struct scsi_qla_host *vha,
5821         struct rsp_que *rsp, response_t *pkt)
5822 {
5823         struct abts_resp_from_24xx_fw *entry =
5824                 (struct abts_resp_from_24xx_fw *)pkt;
5825         u32 h = pkt->handle & ~QLA_TGT_HANDLE_MASK;
5826         struct qla_tgt_mgmt_cmd *mcmd;
5827         struct qla_hw_data *ha = vha->hw;
5828
5829         mcmd = qlt_ctio_to_cmd(vha, rsp, pkt->handle, pkt);
5830         if (mcmd == NULL && h != QLA_TGT_SKIP_HANDLE) {
5831                 ql_dbg(ql_dbg_async, vha, 0xe064,
5832                     "qla_target(%d): ABTS Comp without mcmd\n",
5833                     vha->vp_idx);
5834                 return;
5835         }
5836
5837         if (mcmd)
5838                 vha  = mcmd->vha;
5839         vha->vha_tgt.qla_tgt->abts_resp_expected--;
5840
5841         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5842             "ABTS_RESP_24XX: compl_status %x\n",
5843             entry->compl_status);
5844
5845         if (le16_to_cpu(entry->compl_status) != ABTS_RESP_COMPL_SUCCESS) {
5846                 if (le32_to_cpu(entry->error_subcode1) == 0x1E &&
5847                     le32_to_cpu(entry->error_subcode2) == 0) {
5848                         if (qlt_chk_unresolv_exchg(vha, rsp->qpair, entry)) {
5849                                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5850                                 return;
5851                         }
5852                         qlt_24xx_retry_term_exchange(vha, rsp->qpair,
5853                             pkt, mcmd);
5854                 } else {
5855                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5856                             "qla_target(%d): ABTS_RESP_24XX failed %x (subcode %x:%x)",
5857                             vha->vp_idx, entry->compl_status,
5858                             entry->error_subcode1,
5859                             entry->error_subcode2);
5860                         ha->tgt.tgt_ops->free_mcmd(mcmd);
5861                 }
5862         } else if (mcmd) {
5863                 ha->tgt.tgt_ops->free_mcmd(mcmd);
5864         }
5865 }
5866
5867 /* ha->hardware_lock supposed to be held on entry */
5868 /* called via callback from qla2xxx */
5869 static void qlt_response_pkt(struct scsi_qla_host *vha,
5870         struct rsp_que *rsp, response_t *pkt)
5871 {
5872         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5873
5874         if (unlikely(tgt == NULL)) {
5875                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5876                     "qla_target(%d): Response pkt %x received, but no tgt (ha %p)\n",
5877                     vha->vp_idx, pkt->entry_type, vha->hw);
5878                 return;
5879         }
5880
5881         /*
5882          * In tgt_stop mode we also should allow all requests to pass.
5883          * Otherwise, some commands can stuck.
5884          */
5885
5886         switch (pkt->entry_type) {
5887         case CTIO_CRC2:
5888         case CTIO_TYPE7:
5889         {
5890                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5891
5892                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5893                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5894                     entry);
5895                 break;
5896         }
5897
5898         case ACCEPT_TGT_IO_TYPE:
5899         {
5900                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5901                 int rc;
5902
5903                 if (atio->u.isp2x.status !=
5904                     cpu_to_le16(ATIO_CDB_VALID)) {
5905                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5906                             "qla_target(%d): ATIO with error "
5907                             "status %x received\n", vha->vp_idx,
5908                             le16_to_cpu(atio->u.isp2x.status));
5909                         break;
5910                 }
5911
5912                 rc = qlt_chk_qfull_thresh_hold(vha, rsp->qpair, atio, 1);
5913                 if (rc != 0)
5914                         return;
5915
5916                 rc = qlt_handle_cmd_for_atio(vha, atio);
5917                 if (unlikely(rc != 0)) {
5918                         switch (rc) {
5919                         case -ENODEV:
5920                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5921                                     "qla_target: Unable to send command to target\n");
5922                                 break;
5923                         case -EBADF:
5924                                 ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5925                                     "qla_target: Unable to send command to target, sending TERM EXCHANGE for rsp\n");
5926                                 qlt_send_term_exchange(rsp->qpair, NULL,
5927                                     atio, 1, 0);
5928                                 break;
5929                         case -EBUSY:
5930                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5931                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5932                                     vha->vp_idx);
5933                                 qlt_send_busy(rsp->qpair, atio,
5934                                     tc_sam_status);
5935                                 break;
5936                         default:
5937                                 ql_dbg(ql_dbg_tgt, vha, 0xe060,
5938                                     "qla_target(%d): Unable to send command to target, sending BUSY status\n",
5939                                     vha->vp_idx);
5940                                 qlt_send_busy(rsp->qpair, atio,
5941                                     qla_sam_status);
5942                                 break;
5943                         }
5944                 }
5945         }
5946         break;
5947
5948         case CONTINUE_TGT_IO_TYPE:
5949         {
5950                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5951
5952                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5953                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5954                     entry);
5955                 break;
5956         }
5957
5958         case CTIO_A64_TYPE:
5959         {
5960                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5961
5962                 qlt_do_ctio_completion(vha, rsp, entry->handle,
5963                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5964                     entry);
5965                 break;
5966         }
5967
5968         case IMMED_NOTIFY_TYPE:
5969                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5970                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5971                 break;
5972
5973         case NOTIFY_ACK_TYPE:
5974                 if (tgt->notify_ack_expected > 0) {
5975                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5976
5977                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5978                             "NOTIFY_ACK seq %08x status %x\n",
5979                             le16_to_cpu(entry->u.isp2x.seq_id),
5980                             le16_to_cpu(entry->u.isp2x.status));
5981                         tgt->notify_ack_expected--;
5982                         if (entry->u.isp2x.status !=
5983                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5984                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5985                                     "qla_target(%d): NOTIFY_ACK "
5986                                     "failed %x\n", vha->vp_idx,
5987                                     le16_to_cpu(entry->u.isp2x.status));
5988                         }
5989                 } else {
5990                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5991                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5992                             vha->vp_idx);
5993                 }
5994                 break;
5995
5996         case ABTS_RECV_24XX:
5997                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5998                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5999                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
6000                 break;
6001
6002         case ABTS_RESP_24XX:
6003                 if (tgt->abts_resp_expected > 0) {
6004                         qlt_handle_abts_completion(vha, rsp, pkt);
6005                 } else {
6006                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
6007                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
6008                             "received\n", vha->vp_idx);
6009                 }
6010                 break;
6011
6012         default:
6013                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
6014                     "qla_target(%d): Received unknown response pkt "
6015                     "type %x\n", vha->vp_idx, pkt->entry_type);
6016                 break;
6017         }
6018
6019 }
6020
6021 /*
6022  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
6023  */
6024 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
6025         uint16_t *mailbox)
6026 {
6027         struct qla_hw_data *ha = vha->hw;
6028         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6029         int login_code;
6030
6031         if (!tgt || tgt->tgt_stop || tgt->tgt_stopped)
6032                 return;
6033
6034         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
6035             IS_QLA2100(ha))
6036                 return;
6037         /*
6038          * In tgt_stop mode we also should allow all requests to pass.
6039          * Otherwise, some commands can stuck.
6040          */
6041
6042
6043         switch (code) {
6044         case MBA_RESET:                 /* Reset */
6045         case MBA_SYSTEM_ERR:            /* System Error */
6046         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
6047         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
6048                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
6049                     "qla_target(%d): System error async event %#x "
6050                     "occurred", vha->vp_idx, code);
6051                 break;
6052         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
6053                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6054                 break;
6055
6056         case MBA_LOOP_UP:
6057         {
6058                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
6059                     "qla_target(%d): Async LOOP_UP occurred "
6060                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
6061                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6062                 if (tgt->link_reinit_iocb_pending) {
6063                         qlt_send_notify_ack(ha->base_qpair,
6064                             &tgt->link_reinit_iocb,
6065                             0, 0, 0, 0, 0, 0);
6066                         tgt->link_reinit_iocb_pending = 0;
6067                 }
6068                 break;
6069         }
6070
6071         case MBA_LIP_OCCURRED:
6072         case MBA_LOOP_DOWN:
6073         case MBA_LIP_RESET:
6074         case MBA_RSCN_UPDATE:
6075                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
6076                     "qla_target(%d): Async event %#x occurred "
6077                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6078                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6079                 break;
6080
6081         case MBA_REJECTED_FCP_CMD:
6082                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf017,
6083                     "qla_target(%d): Async event LS_REJECT occurred (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)",
6084                     vha->vp_idx,
6085                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6086
6087                 if (mailbox[3] == 1) {
6088                         /* exchange starvation. */
6089                         vha->hw->exch_starvation++;
6090                         if (vha->hw->exch_starvation > 5) {
6091                                 ql_log(ql_log_warn, vha, 0xd03a,
6092                                     "Exchange starvation-. Resetting RISC\n");
6093
6094                                 vha->hw->exch_starvation = 0;
6095                                 if (IS_P3P_TYPE(vha->hw))
6096                                         set_bit(FCOE_CTX_RESET_NEEDED,
6097                                             &vha->dpc_flags);
6098                                 else
6099                                         set_bit(ISP_ABORT_NEEDED,
6100                                             &vha->dpc_flags);
6101                                 qla2xxx_wake_dpc(vha);
6102                         }
6103                 }
6104                 break;
6105
6106         case MBA_PORT_UPDATE:
6107                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
6108                     "qla_target(%d): Port update async event %#x "
6109                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
6110                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
6111                     mailbox[0], mailbox[1], mailbox[2], mailbox[3]);
6112
6113                 login_code = mailbox[2];
6114                 if (login_code == 0x4) {
6115                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
6116                             "Async MB 2: Got PLOGI Complete\n");
6117                         vha->hw->exch_starvation = 0;
6118                 } else if (login_code == 0x7)
6119                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
6120                             "Async MB 2: Port Logged Out\n");
6121                 break;
6122         default:
6123                 break;
6124         }
6125
6126 }
6127
6128 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
6129         uint16_t loop_id)
6130 {
6131         fc_port_t *fcport, *tfcp, *del;
6132         int rc;
6133         unsigned long flags;
6134         u8 newfcport = 0;
6135
6136         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
6137         if (!fcport) {
6138                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
6139                     "qla_target(%d): Allocation of tmp FC port failed",
6140                     vha->vp_idx);
6141                 return NULL;
6142         }
6143
6144         fcport->loop_id = loop_id;
6145
6146         rc = qla24xx_gpdb_wait(vha, fcport, 0);
6147         if (rc != QLA_SUCCESS) {
6148                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
6149                     "qla_target(%d): Failed to retrieve fcport "
6150                     "information -- get_port_database() returned %x "
6151                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
6152                 kfree(fcport);
6153                 return NULL;
6154         }
6155
6156         del = NULL;
6157         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
6158         tfcp = qla2x00_find_fcport_by_wwpn(vha, fcport->port_name, 1);
6159
6160         if (tfcp) {
6161                 tfcp->d_id = fcport->d_id;
6162                 tfcp->port_type = fcport->port_type;
6163                 tfcp->supported_classes = fcport->supported_classes;
6164                 tfcp->flags |= fcport->flags;
6165                 tfcp->scan_state = QLA_FCPORT_FOUND;
6166
6167                 del = fcport;
6168                 fcport = tfcp;
6169         } else {
6170                 if (vha->hw->current_topology == ISP_CFG_F)
6171                         fcport->flags |= FCF_FABRIC_DEVICE;
6172
6173                 list_add_tail(&fcport->list, &vha->vp_fcports);
6174                 if (!IS_SW_RESV_ADDR(fcport->d_id))
6175                    vha->fcport_count++;
6176                 fcport->login_gen++;
6177                 qla2x00_set_fcport_disc_state(fcport, DSC_LOGIN_COMPLETE);
6178                 fcport->login_succ = 1;
6179                 newfcport = 1;
6180         }
6181
6182         fcport->deleted = 0;
6183         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
6184
6185         switch (vha->host->active_mode) {
6186         case MODE_INITIATOR:
6187         case MODE_DUAL:
6188                 if (newfcport) {
6189                         if (!IS_IIDMA_CAPABLE(vha->hw) || !vha->hw->flags.gpsc_supported) {
6190                                 qla24xx_sched_upd_fcport(fcport);
6191                         } else {
6192                                 ql_dbg(ql_dbg_disc, vha, 0x20ff,
6193                                    "%s %d %8phC post gpsc fcp_cnt %d\n",
6194                                    __func__, __LINE__, fcport->port_name, vha->fcport_count);
6195                                 qla24xx_post_gpsc_work(vha, fcport);
6196                         }
6197                 }
6198                 break;
6199
6200         case MODE_TARGET:
6201         default:
6202                 break;
6203         }
6204         if (del)
6205                 qla2x00_free_fcport(del);
6206
6207         return fcport;
6208 }
6209
6210 /* Must be called under tgt_mutex */
6211 static struct fc_port *qlt_make_local_sess(struct scsi_qla_host *vha,
6212                                            be_id_t s_id)
6213 {
6214         struct fc_port *sess = NULL;
6215         fc_port_t *fcport = NULL;
6216         int rc, global_resets;
6217         uint16_t loop_id = 0;
6218
6219         if (s_id.domain == 0xFF && s_id.area == 0xFC) {
6220                 /*
6221                  * This is Domain Controller, so it should be
6222                  * OK to drop SCSI commands from it.
6223                  */
6224                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
6225                     "Unable to find initiator with S_ID %x:%x:%x",
6226                     s_id.domain, s_id.area, s_id.al_pa);
6227                 return NULL;
6228         }
6229
6230         mutex_lock(&vha->vha_tgt.tgt_mutex);
6231
6232 retry:
6233         global_resets =
6234             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
6235
6236         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
6237         if (rc != 0) {
6238                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6239
6240                 ql_log(ql_log_info, vha, 0xf071,
6241                     "qla_target(%d): Unable to find "
6242                     "initiator with S_ID %x:%x:%x",
6243                     vha->vp_idx, s_id.domain, s_id.area, s_id.al_pa);
6244
6245                 if (rc == -ENOENT) {
6246                         qlt_port_logo_t logo;
6247
6248                         logo.id = be_to_port_id(s_id);
6249                         logo.cmd_count = 1;
6250                         qlt_send_first_logo(vha, &logo);
6251                 }
6252
6253                 return NULL;
6254         }
6255
6256         fcport = qlt_get_port_database(vha, loop_id);
6257         if (!fcport) {
6258                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
6259                 return NULL;
6260         }
6261
6262         if (global_resets !=
6263             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
6264                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
6265                     "qla_target(%d): global reset during session discovery "
6266                     "(counter was %d, new %d), retrying", vha->vp_idx,
6267                     global_resets,
6268                     atomic_read(&vha->vha_tgt.
6269                         qla_tgt->tgt_global_resets_count));
6270                 goto retry;
6271         }
6272
6273         sess = qlt_create_sess(vha, fcport, true);
6274
6275         mutex_unlock(&vha->vha_tgt.tgt_mutex);
6276
6277         return sess;
6278 }
6279
6280 static void qlt_abort_work(struct qla_tgt *tgt,
6281         struct qla_tgt_sess_work_param *prm)
6282 {
6283         struct scsi_qla_host *vha = tgt->vha;
6284         struct qla_hw_data *ha = vha->hw;
6285         struct fc_port *sess = NULL;
6286         unsigned long flags = 0, flags2 = 0;
6287         be_id_t s_id;
6288         int rc;
6289
6290         spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6291
6292         if (tgt->tgt_stop)
6293                 goto out_term2;
6294
6295         s_id = le_id_to_be(prm->abts.fcp_hdr_le.s_id);
6296
6297         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6298         if (!sess) {
6299                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6300
6301                 sess = qlt_make_local_sess(vha, s_id);
6302                 /* sess has got an extra creation ref */
6303
6304                 spin_lock_irqsave(&ha->tgt.sess_lock, flags2);
6305                 if (!sess)
6306                         goto out_term2;
6307         } else {
6308                 if (sess->deleted) {
6309                         sess = NULL;
6310                         goto out_term2;
6311                 }
6312
6313                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6314                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf01c,
6315                             "%s: kref_get fail %8phC \n",
6316                              __func__, sess->port_name);
6317                         sess = NULL;
6318                         goto out_term2;
6319                 }
6320         }
6321
6322         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
6323         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6324
6325         ha->tgt.tgt_ops->put_sess(sess);
6326
6327         if (rc != 0)
6328                 goto out_term;
6329         return;
6330
6331 out_term2:
6332         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags2);
6333
6334 out_term:
6335         spin_lock_irqsave(&ha->hardware_lock, flags);
6336         qlt_24xx_send_abts_resp(ha->base_qpair, &prm->abts,
6337             FCP_TMF_REJECTED, false);
6338         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6339 }
6340
6341 static void qlt_tmr_work(struct qla_tgt *tgt,
6342         struct qla_tgt_sess_work_param *prm)
6343 {
6344         struct atio_from_isp *a = &prm->tm_iocb2;
6345         struct scsi_qla_host *vha = tgt->vha;
6346         struct qla_hw_data *ha = vha->hw;
6347         struct fc_port *sess;
6348         unsigned long flags;
6349         be_id_t s_id;
6350         int rc;
6351         u64 unpacked_lun;
6352         int fn;
6353         void *iocb;
6354
6355         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6356
6357         if (tgt->tgt_stop)
6358                 goto out_term2;
6359
6360         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
6361         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
6362         if (!sess) {
6363                 spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6364
6365                 sess = qlt_make_local_sess(vha, s_id);
6366                 /* sess has got an extra creation ref */
6367
6368                 spin_lock_irqsave(&ha->tgt.sess_lock, flags);
6369                 if (!sess)
6370                         goto out_term2;
6371         } else {
6372                 if (sess->deleted) {
6373                         goto out_term2;
6374                 }
6375
6376                 if (!kref_get_unless_zero(&sess->sess_kref)) {
6377                         ql_dbg(ql_dbg_tgt_tmr, vha, 0xf020,
6378                             "%s: kref_get fail %8phC\n",
6379                              __func__, sess->port_name);
6380                         goto out_term2;
6381                 }
6382         }
6383
6384         iocb = a;
6385         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
6386         unpacked_lun =
6387             scsilun_to_int((struct scsi_lun *)&a->u.isp24.fcp_cmnd.lun);
6388
6389         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
6390         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6391
6392         ha->tgt.tgt_ops->put_sess(sess);
6393
6394         if (rc != 0)
6395                 goto out_term;
6396         return;
6397
6398 out_term2:
6399         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
6400 out_term:
6401         qlt_send_term_exchange(ha->base_qpair, NULL, &prm->tm_iocb2, 1, 0);
6402 }
6403
6404 static void qlt_sess_work_fn(struct work_struct *work)
6405 {
6406         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
6407         struct scsi_qla_host *vha = tgt->vha;
6408         unsigned long flags;
6409
6410         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
6411
6412         spin_lock_irqsave(&tgt->sess_work_lock, flags);
6413         while (!list_empty(&tgt->sess_works_list)) {
6414                 struct qla_tgt_sess_work_param *prm = list_entry(
6415                     tgt->sess_works_list.next, typeof(*prm),
6416                     sess_works_list_entry);
6417
6418                 /*
6419                  * This work can be scheduled on several CPUs at time, so we
6420                  * must delete the entry to eliminate double processing
6421                  */
6422                 list_del(&prm->sess_works_list_entry);
6423
6424                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6425
6426                 switch (prm->type) {
6427                 case QLA_TGT_SESS_WORK_ABORT:
6428                         qlt_abort_work(tgt, prm);
6429                         break;
6430                 case QLA_TGT_SESS_WORK_TM:
6431                         qlt_tmr_work(tgt, prm);
6432                         break;
6433                 default:
6434                         BUG_ON(1);
6435                         break;
6436                 }
6437
6438                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
6439
6440                 kfree(prm);
6441         }
6442         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
6443 }
6444
6445 /* Must be called under tgt_host_action_mutex */
6446 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
6447 {
6448         struct qla_tgt *tgt;
6449         int rc, i;
6450         struct qla_qpair_hint *h;
6451
6452         if (!QLA_TGT_MODE_ENABLED())
6453                 return 0;
6454
6455         if (!IS_TGT_MODE_CAPABLE(ha)) {
6456                 ql_log(ql_log_warn, base_vha, 0xe070,
6457                     "This adapter does not support target mode.\n");
6458                 return 0;
6459         }
6460
6461         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
6462             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
6463
6464         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
6465
6466         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
6467         if (!tgt) {
6468                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
6469                     "Unable to allocate struct qla_tgt\n");
6470                 return -ENOMEM;
6471         }
6472
6473         tgt->qphints = kcalloc(ha->max_qpairs + 1,
6474                                sizeof(struct qla_qpair_hint),
6475                                GFP_KERNEL);
6476         if (!tgt->qphints) {
6477                 kfree(tgt);
6478                 ql_log(ql_log_warn, base_vha, 0x0197,
6479                     "Unable to allocate qpair hints.\n");
6480                 return -ENOMEM;
6481         }
6482
6483         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
6484                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
6485
6486         rc = btree_init64(&tgt->lun_qpair_map);
6487         if (rc) {
6488                 kfree(tgt->qphints);
6489                 kfree(tgt);
6490                 ql_log(ql_log_info, base_vha, 0x0198,
6491                         "Unable to initialize lun_qpair_map btree\n");
6492                 return -EIO;
6493         }
6494         h = &tgt->qphints[0];
6495         h->qpair = ha->base_qpair;
6496         INIT_LIST_HEAD(&h->hint_elem);
6497         h->cpuid = ha->base_qpair->cpuid;
6498         list_add_tail(&h->hint_elem, &ha->base_qpair->hints_list);
6499
6500         for (i = 0; i < ha->max_qpairs; i++) {
6501                 unsigned long flags;
6502
6503                 struct qla_qpair *qpair = ha->queue_pair_map[i];
6504
6505                 h = &tgt->qphints[i + 1];
6506                 INIT_LIST_HEAD(&h->hint_elem);
6507                 if (qpair) {
6508                         h->qpair = qpair;
6509                         spin_lock_irqsave(qpair->qp_lock_ptr, flags);
6510                         list_add_tail(&h->hint_elem, &qpair->hints_list);
6511                         spin_unlock_irqrestore(qpair->qp_lock_ptr, flags);
6512                         h->cpuid = qpair->cpuid;
6513                 }
6514         }
6515
6516         tgt->ha = ha;
6517         tgt->vha = base_vha;
6518         init_waitqueue_head(&tgt->waitQ);
6519         INIT_LIST_HEAD(&tgt->del_sess_list);
6520         spin_lock_init(&tgt->sess_work_lock);
6521         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
6522         INIT_LIST_HEAD(&tgt->sess_works_list);
6523         atomic_set(&tgt->tgt_global_resets_count, 0);
6524
6525         base_vha->vha_tgt.qla_tgt = tgt;
6526
6527         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
6528                 "qla_target(%d): using 64 Bit PCI addressing",
6529                 base_vha->vp_idx);
6530         /* 3 is reserved */
6531         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
6532
6533         mutex_lock(&qla_tgt_mutex);
6534         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
6535         mutex_unlock(&qla_tgt_mutex);
6536
6537         if (ha->tgt.tgt_ops && ha->tgt.tgt_ops->add_target)
6538                 ha->tgt.tgt_ops->add_target(base_vha);
6539
6540         return 0;
6541 }
6542
6543 /* Must be called under tgt_host_action_mutex */
6544 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
6545 {
6546         if (!vha->vha_tgt.qla_tgt)
6547                 return 0;
6548
6549         if (vha->fc_vport) {
6550                 qlt_release(vha->vha_tgt.qla_tgt);
6551                 return 0;
6552         }
6553
6554         /* free left over qfull cmds */
6555         qlt_init_term_exchange(vha);
6556
6557         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
6558             vha->host_no, ha);
6559         qlt_release(vha->vha_tgt.qla_tgt);
6560
6561         return 0;
6562 }
6563
6564 void qla_remove_hostmap(struct qla_hw_data *ha)
6565 {
6566         struct scsi_qla_host *node;
6567         u32 key = 0;
6568
6569         btree_for_each_safe32(&ha->host_map, key, node)
6570                 btree_remove32(&ha->host_map, key);
6571
6572         btree_destroy32(&ha->host_map);
6573 }
6574
6575 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
6576         unsigned char *b)
6577 {
6578         pr_debug("qla2xxx HW vha->node_name: %8phC\n", vha->node_name);
6579         pr_debug("qla2xxx HW vha->port_name: %8phC\n", vha->port_name);
6580         put_unaligned_be64(wwpn, b);
6581         pr_debug("qla2xxx passed configfs WWPN: %8phC\n", b);
6582 }
6583
6584 /**
6585  * qlt_lport_register - register lport with external module
6586  *
6587  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
6588  * @phys_wwpn: physical port WWPN
6589  * @npiv_wwpn: NPIV WWPN
6590  * @npiv_wwnn: NPIV WWNN
6591  * @callback:  lport initialization callback for tcm_qla2xxx code
6592  */
6593 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
6594                        u64 npiv_wwpn, u64 npiv_wwnn,
6595                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
6596 {
6597         struct qla_tgt *tgt;
6598         struct scsi_qla_host *vha;
6599         struct qla_hw_data *ha;
6600         struct Scsi_Host *host;
6601         unsigned long flags;
6602         int rc;
6603         u8 b[WWN_SIZE];
6604
6605         mutex_lock(&qla_tgt_mutex);
6606         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
6607                 vha = tgt->vha;
6608                 ha = vha->hw;
6609
6610                 host = vha->host;
6611                 if (!host)
6612                         continue;
6613
6614                 if (!(host->hostt->supported_mode & MODE_TARGET))
6615                         continue;
6616
6617                 if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6618                         continue;
6619
6620                 spin_lock_irqsave(&ha->hardware_lock, flags);
6621                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
6622                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
6623                             host->host_no);
6624                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6625                         continue;
6626                 }
6627                 if (tgt->tgt_stop) {
6628                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
6629                                  host->host_no);
6630                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6631                         continue;
6632                 }
6633                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
6634
6635                 if (!scsi_host_get(host)) {
6636                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
6637                             "Unable to scsi_host_get() for"
6638                             " qla2xxx scsi_host\n");
6639                         continue;
6640                 }
6641                 qlt_lport_dump(vha, phys_wwpn, b);
6642
6643                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
6644                         scsi_host_put(host);
6645                         continue;
6646                 }
6647                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
6648                 if (rc != 0)
6649                         scsi_host_put(host);
6650
6651                 mutex_unlock(&qla_tgt_mutex);
6652                 return rc;
6653         }
6654         mutex_unlock(&qla_tgt_mutex);
6655
6656         return -ENODEV;
6657 }
6658 EXPORT_SYMBOL(qlt_lport_register);
6659
6660 /**
6661  * qlt_lport_deregister - Degister lport
6662  *
6663  * @vha:  Registered scsi_qla_host pointer
6664  */
6665 void qlt_lport_deregister(struct scsi_qla_host *vha)
6666 {
6667         struct qla_hw_data *ha = vha->hw;
6668         struct Scsi_Host *sh = vha->host;
6669         /*
6670          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
6671          */
6672         vha->vha_tgt.target_lport_ptr = NULL;
6673         ha->tgt.tgt_ops = NULL;
6674         /*
6675          * Release the Scsi_Host reference for the underlying qla2xxx host
6676          */
6677         scsi_host_put(sh);
6678 }
6679 EXPORT_SYMBOL(qlt_lport_deregister);
6680
6681 /* Must be called under HW lock */
6682 void qlt_set_mode(struct scsi_qla_host *vha)
6683 {
6684         switch (vha->qlini_mode) {
6685         case QLA2XXX_INI_MODE_DISABLED:
6686         case QLA2XXX_INI_MODE_EXCLUSIVE:
6687                 vha->host->active_mode = MODE_TARGET;
6688                 break;
6689         case QLA2XXX_INI_MODE_ENABLED:
6690                 vha->host->active_mode = MODE_INITIATOR;
6691                 break;
6692         case QLA2XXX_INI_MODE_DUAL:
6693                 vha->host->active_mode = MODE_DUAL;
6694                 break;
6695         default:
6696                 break;
6697         }
6698 }
6699
6700 /* Must be called under HW lock */
6701 static void qlt_clear_mode(struct scsi_qla_host *vha)
6702 {
6703         switch (vha->qlini_mode) {
6704         case QLA2XXX_INI_MODE_DISABLED:
6705                 vha->host->active_mode = MODE_UNKNOWN;
6706                 break;
6707         case QLA2XXX_INI_MODE_EXCLUSIVE:
6708                 vha->host->active_mode = MODE_INITIATOR;
6709                 break;
6710         case QLA2XXX_INI_MODE_ENABLED:
6711         case QLA2XXX_INI_MODE_DUAL:
6712                 vha->host->active_mode = MODE_INITIATOR;
6713                 break;
6714         default:
6715                 break;
6716         }
6717 }
6718
6719 /*
6720  * qla_tgt_enable_vha - NO LOCK HELD
6721  *
6722  * host_reset, bring up w/ Target Mode Enabled
6723  */
6724 void
6725 qlt_enable_vha(struct scsi_qla_host *vha)
6726 {
6727         struct qla_hw_data *ha = vha->hw;
6728         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6729         unsigned long flags;
6730         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6731
6732         if (!tgt) {
6733                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6734                     "Unable to locate qla_tgt pointer from"
6735                     " struct qla_hw_data\n");
6736                 dump_stack();
6737                 return;
6738         }
6739         if (vha->qlini_mode == QLA2XXX_INI_MODE_ENABLED)
6740                 return;
6741
6742         if (ha->tgt.num_act_qpairs > ha->max_qpairs)
6743                 ha->tgt.num_act_qpairs = ha->max_qpairs;
6744         spin_lock_irqsave(&ha->hardware_lock, flags);
6745         tgt->tgt_stopped = 0;
6746         qlt_set_mode(vha);
6747         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6748
6749         mutex_lock(&ha->optrom_mutex);
6750         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
6751             "%s.\n", __func__);
6752         if (vha->vp_idx) {
6753                 qla24xx_disable_vp(vha);
6754                 qla24xx_enable_vp(vha);
6755         } else {
6756                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6757                 qla2xxx_wake_dpc(base_vha);
6758                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6759                              QLA_SUCCESS);
6760         }
6761         mutex_unlock(&ha->optrom_mutex);
6762 }
6763 EXPORT_SYMBOL(qlt_enable_vha);
6764
6765 /*
6766  * qla_tgt_disable_vha - NO LOCK HELD
6767  *
6768  * Disable Target Mode and reset the adapter
6769  */
6770 static void qlt_disable_vha(struct scsi_qla_host *vha)
6771 {
6772         struct qla_hw_data *ha = vha->hw;
6773         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6774         unsigned long flags;
6775
6776         if (!tgt) {
6777                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6778                     "Unable to locate qla_tgt pointer from"
6779                     " struct qla_hw_data\n");
6780                 dump_stack();
6781                 return;
6782         }
6783
6784         spin_lock_irqsave(&ha->hardware_lock, flags);
6785         qlt_clear_mode(vha);
6786         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6787
6788         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6789         qla2xxx_wake_dpc(vha);
6790
6791         /*
6792          * We are expecting the offline state.
6793          * QLA_FUNCTION_FAILED means that adapter is offline.
6794          */
6795         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6796                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6797                        "adapter is offline\n");
6798 }
6799
6800 /*
6801  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6802  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6803  * members.
6804  */
6805 void
6806 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6807 {
6808         vha->vha_tgt.qla_tgt = NULL;
6809
6810         mutex_init(&vha->vha_tgt.tgt_mutex);
6811         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6812
6813         qlt_clear_mode(vha);
6814
6815         /*
6816          * NOTE: Currently the value is kept the same for <24xx and
6817          * >=24xx ISPs. If it is necessary to change it,
6818          * the check should be added for specific ISPs,
6819          * assigning the value appropriately.
6820          */
6821         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6822
6823         qlt_add_target(ha, vha);
6824 }
6825
6826 u8
6827 qlt_rff_id(struct scsi_qla_host *vha)
6828 {
6829         u8 fc4_feature = 0;
6830         /*
6831          * FC-4 Feature bit 0 indicates target functionality to the name server.
6832          */
6833         if (qla_tgt_mode_enabled(vha)) {
6834                 fc4_feature = BIT_0;
6835         } else if (qla_ini_mode_enabled(vha)) {
6836                 fc4_feature = BIT_1;
6837         } else if (qla_dual_mode_enabled(vha))
6838                 fc4_feature = BIT_0 | BIT_1;
6839
6840         return fc4_feature;
6841 }
6842
6843 /*
6844  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6845  * @ha: HA context
6846  *
6847  * Beginning of ATIO ring has initialization control block already built
6848  * by nvram config routine.
6849  *
6850  * Returns 0 on success.
6851  */
6852 void
6853 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6854 {
6855         struct qla_hw_data *ha = vha->hw;
6856         uint16_t cnt;
6857         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6858
6859         if (qla_ini_mode_enabled(vha))
6860                 return;
6861
6862         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6863                 pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6864                 pkt++;
6865         }
6866
6867 }
6868
6869 /*
6870  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6871  * @ha: SCSI driver HA context
6872  */
6873 void
6874 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha, uint8_t ha_locked)
6875 {
6876         struct qla_hw_data *ha = vha->hw;
6877         struct atio_from_isp *pkt;
6878         int cnt, i;
6879
6880         if (!ha->flags.fw_started)
6881                 return;
6882
6883         while ((ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) ||
6884             fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr)) {
6885                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6886                 cnt = pkt->u.raw.entry_count;
6887
6888                 if (unlikely(fcpcmd_is_corrupted(ha->tgt.atio_ring_ptr))) {
6889                         /*
6890                          * This packet is corrupted. The header + payload
6891                          * can not be trusted. There is no point in passing
6892                          * it further up.
6893                          */
6894                         ql_log(ql_log_warn, vha, 0xd03c,
6895                             "corrupted fcp frame SID[%3phN] OXID[%04x] EXCG[%x] %64phN\n",
6896                             &pkt->u.isp24.fcp_hdr.s_id,
6897                             be16_to_cpu(pkt->u.isp24.fcp_hdr.ox_id),
6898                             pkt->u.isp24.exchange_addr, pkt);
6899
6900                         adjust_corrupted_atio(pkt);
6901                         qlt_send_term_exchange(ha->base_qpair, NULL, pkt,
6902                             ha_locked, 0);
6903                 } else {
6904                         qlt_24xx_atio_pkt_all_vps(vha,
6905                             (struct atio_from_isp *)pkt, ha_locked);
6906                 }
6907
6908                 for (i = 0; i < cnt; i++) {
6909                         ha->tgt.atio_ring_index++;
6910                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6911                                 ha->tgt.atio_ring_index = 0;
6912                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6913                         } else
6914                                 ha->tgt.atio_ring_ptr++;
6915
6916                         pkt->u.raw.signature = cpu_to_le32(ATIO_PROCESSED);
6917                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6918                 }
6919                 wmb();
6920         }
6921
6922         /* Adjust ring index */
6923         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6924 }
6925
6926 void
6927 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6928 {
6929         struct qla_hw_data *ha = vha->hw;
6930         struct qla_msix_entry *msix = &ha->msix_entries[2];
6931         struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6932
6933         if (!QLA_TGT_MODE_ENABLED())
6934                 return;
6935
6936         wrt_reg_dword(ISP_ATIO_Q_IN(vha), 0);
6937         wrt_reg_dword(ISP_ATIO_Q_OUT(vha), 0);
6938         rd_reg_dword(ISP_ATIO_Q_OUT(vha));
6939
6940         if (ha->flags.msix_enabled) {
6941                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6942                         if (IS_QLA2071(ha)) {
6943                                 /* 4 ports Baker: Enable Interrupt Handshake */
6944                                 icb->msix_atio = 0;
6945                                 icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6946                         } else {
6947                                 icb->msix_atio = cpu_to_le16(msix->entry);
6948                                 icb->firmware_options_2 &= cpu_to_le32(~BIT_26);
6949                         }
6950                         ql_dbg(ql_dbg_init, vha, 0xf072,
6951                             "Registering ICB vector 0x%x for atio que.\n",
6952                             msix->entry);
6953                 }
6954         } else {
6955                 /* INTx|MSI */
6956                 if (IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
6957                         icb->msix_atio = 0;
6958                         icb->firmware_options_2 |= cpu_to_le32(BIT_26);
6959                         ql_dbg(ql_dbg_init, vha, 0xf072,
6960                             "%s: Use INTx for ATIOQ.\n", __func__);
6961                 }
6962         }
6963 }
6964
6965 void
6966 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6967 {
6968         struct qla_hw_data *ha = vha->hw;
6969         u32 tmp;
6970
6971         if (!QLA_TGT_MODE_ENABLED())
6972                 return;
6973
6974         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
6975                 if (!ha->tgt.saved_set) {
6976                         /* We save only once */
6977                         ha->tgt.saved_exchange_count = nv->exchange_count;
6978                         ha->tgt.saved_firmware_options_1 =
6979                             nv->firmware_options_1;
6980                         ha->tgt.saved_firmware_options_2 =
6981                             nv->firmware_options_2;
6982                         ha->tgt.saved_firmware_options_3 =
6983                             nv->firmware_options_3;
6984                         ha->tgt.saved_set = 1;
6985                 }
6986
6987                 if (qla_tgt_mode_enabled(vha))
6988                         nv->exchange_count = cpu_to_le16(0xFFFF);
6989                 else                    /* dual */
6990                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
6991
6992                 /* Enable target mode */
6993                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6994
6995                 /* Disable ini mode, if requested */
6996                 if (qla_tgt_mode_enabled(vha))
6997                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6998
6999                 /* Disable Full Login after LIP */
7000                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
7001                 /* Enable initial LIP */
7002                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
7003                 if (ql2xtgt_tape_enable)
7004                         /* Enable FC Tape support */
7005                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7006                 else
7007                         /* Disable FC Tape support */
7008                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7009
7010                 /* Disable Full Login after LIP */
7011                 nv->host_p &= cpu_to_le32(~BIT_10);
7012
7013                 /*
7014                  * clear BIT 15 explicitly as we have seen at least
7015                  * a couple of instances where this was set and this
7016                  * was causing the firmware to not be initialized.
7017                  */
7018                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7019                 /* Enable target PRLI control */
7020                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7021
7022                 if (IS_QLA25XX(ha)) {
7023                         /* Change Loop-prefer to Pt-Pt */
7024                         tmp = ~(BIT_4|BIT_5|BIT_6);
7025                         nv->firmware_options_2 &= cpu_to_le32(tmp);
7026                         tmp = P2P << 4;
7027                         nv->firmware_options_2 |= cpu_to_le32(tmp);
7028                 }
7029         } else {
7030                 if (ha->tgt.saved_set) {
7031                         nv->exchange_count = ha->tgt.saved_exchange_count;
7032                         nv->firmware_options_1 =
7033                             ha->tgt.saved_firmware_options_1;
7034                         nv->firmware_options_2 =
7035                             ha->tgt.saved_firmware_options_2;
7036                         nv->firmware_options_3 =
7037                             ha->tgt.saved_firmware_options_3;
7038                 }
7039                 return;
7040         }
7041
7042         if (ha->base_qpair->enable_class_2) {
7043                 if (vha->flags.init_done)
7044                         fc_host_supported_classes(vha->host) =
7045                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7046
7047                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7048         } else {
7049                 if (vha->flags.init_done)
7050                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7051
7052                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7053         }
7054 }
7055
7056 void
7057 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
7058         struct init_cb_24xx *icb)
7059 {
7060         struct qla_hw_data *ha = vha->hw;
7061
7062         if (!QLA_TGT_MODE_ENABLED())
7063                 return;
7064
7065         if (ha->tgt.node_name_set) {
7066                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7067                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7068         }
7069 }
7070
7071 void
7072 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
7073 {
7074         struct qla_hw_data *ha = vha->hw;
7075         u32 tmp;
7076
7077         if (!QLA_TGT_MODE_ENABLED())
7078                 return;
7079
7080         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha)) {
7081                 if (!ha->tgt.saved_set) {
7082                         /* We save only once */
7083                         ha->tgt.saved_exchange_count = nv->exchange_count;
7084                         ha->tgt.saved_firmware_options_1 =
7085                             nv->firmware_options_1;
7086                         ha->tgt.saved_firmware_options_2 =
7087                             nv->firmware_options_2;
7088                         ha->tgt.saved_firmware_options_3 =
7089                             nv->firmware_options_3;
7090                         ha->tgt.saved_set = 1;
7091                 }
7092
7093                 if (qla_tgt_mode_enabled(vha))
7094                         nv->exchange_count = cpu_to_le16(0xFFFF);
7095                 else                    /* dual */
7096                         nv->exchange_count = cpu_to_le16(vha->ql2xexchoffld);
7097
7098                 /* Enable target mode */
7099                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
7100
7101                 /* Disable ini mode, if requested */
7102                 if (qla_tgt_mode_enabled(vha))
7103                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
7104                 /* Disable Full Login after LIP */
7105                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
7106                 /* Enable initial LIP */
7107                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
7108                 /*
7109                  * clear BIT 15 explicitly as we have seen at
7110                  * least a couple of instances where this was set
7111                  * and this was causing the firmware to not be
7112                  * initialized.
7113                  */
7114                 nv->firmware_options_1 &= cpu_to_le32(~BIT_15);
7115                 if (ql2xtgt_tape_enable)
7116                         /* Enable FC tape support */
7117                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
7118                 else
7119                         /* Disable FC tape support */
7120                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
7121
7122                 /* Disable Full Login after LIP */
7123                 nv->host_p &= cpu_to_le32(~BIT_10);
7124                 /* Enable target PRLI control */
7125                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
7126
7127                 /* Change Loop-prefer to Pt-Pt */
7128                 tmp = ~(BIT_4|BIT_5|BIT_6);
7129                 nv->firmware_options_2 &= cpu_to_le32(tmp);
7130                 tmp = P2P << 4;
7131                 nv->firmware_options_2 |= cpu_to_le32(tmp);
7132         } else {
7133                 if (ha->tgt.saved_set) {
7134                         nv->exchange_count = ha->tgt.saved_exchange_count;
7135                         nv->firmware_options_1 =
7136                             ha->tgt.saved_firmware_options_1;
7137                         nv->firmware_options_2 =
7138                             ha->tgt.saved_firmware_options_2;
7139                         nv->firmware_options_3 =
7140                             ha->tgt.saved_firmware_options_3;
7141                 }
7142                 return;
7143         }
7144
7145         if (ha->base_qpair->enable_class_2) {
7146                 if (vha->flags.init_done)
7147                         fc_host_supported_classes(vha->host) =
7148                                 FC_COS_CLASS2 | FC_COS_CLASS3;
7149
7150                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
7151         } else {
7152                 if (vha->flags.init_done)
7153                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
7154
7155                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
7156         }
7157 }
7158
7159 void
7160 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
7161         struct init_cb_81xx *icb)
7162 {
7163         struct qla_hw_data *ha = vha->hw;
7164
7165         if (!QLA_TGT_MODE_ENABLED())
7166                 return;
7167
7168         if (ha->tgt.node_name_set) {
7169                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
7170                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
7171         }
7172 }
7173
7174 void
7175 qlt_83xx_iospace_config(struct qla_hw_data *ha)
7176 {
7177         if (!QLA_TGT_MODE_ENABLED())
7178                 return;
7179
7180         ha->msix_count += 1; /* For ATIO Q */
7181 }
7182
7183
7184 void
7185 qlt_modify_vp_config(struct scsi_qla_host *vha,
7186         struct vp_config_entry_24xx *vpmod)
7187 {
7188         /* enable target mode.  Bit5 = 1 => disable */
7189         if (qla_tgt_mode_enabled(vha) || qla_dual_mode_enabled(vha))
7190                 vpmod->options_idx1 &= ~BIT_5;
7191
7192         /* Disable ini mode, if requested.  bit4 = 1 => disable */
7193         if (qla_tgt_mode_enabled(vha))
7194                 vpmod->options_idx1 &= ~BIT_4;
7195 }
7196
7197 void
7198 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
7199 {
7200         mutex_init(&base_vha->vha_tgt.tgt_mutex);
7201         if (!QLA_TGT_MODE_ENABLED())
7202                 return;
7203
7204         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha) || IS_QLA28XX(ha)) {
7205                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
7206                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
7207         } else {
7208                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
7209                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
7210         }
7211
7212         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
7213
7214         INIT_LIST_HEAD(&base_vha->unknown_atio_list);
7215         INIT_DELAYED_WORK(&base_vha->unknown_atio_work,
7216             qlt_unknown_atio_work_fn);
7217
7218         qlt_clear_mode(base_vha);
7219
7220         qlt_update_vp_map(base_vha, SET_VP_IDX);
7221 }
7222
7223 irqreturn_t
7224 qla83xx_msix_atio_q(int irq, void *dev_id)
7225 {
7226         struct rsp_que *rsp;
7227         scsi_qla_host_t *vha;
7228         struct qla_hw_data *ha;
7229         unsigned long flags;
7230
7231         rsp = (struct rsp_que *) dev_id;
7232         ha = rsp->hw;
7233         vha = pci_get_drvdata(ha->pdev);
7234
7235         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7236
7237         qlt_24xx_process_atio_queue(vha, 0);
7238
7239         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7240
7241         return IRQ_HANDLED;
7242 }
7243
7244 static void
7245 qlt_handle_abts_recv_work(struct work_struct *work)
7246 {
7247         struct qla_tgt_sess_op *op = container_of(work,
7248                 struct qla_tgt_sess_op, work);
7249         scsi_qla_host_t *vha = op->vha;
7250         struct qla_hw_data *ha = vha->hw;
7251         unsigned long flags;
7252
7253         if (qla2x00_reset_active(vha) ||
7254             (op->chip_reset != ha->base_qpair->chip_reset))
7255                 return;
7256
7257         spin_lock_irqsave(&ha->tgt.atio_lock, flags);
7258         qlt_24xx_process_atio_queue(vha, 0);
7259         spin_unlock_irqrestore(&ha->tgt.atio_lock, flags);
7260
7261         spin_lock_irqsave(&ha->hardware_lock, flags);
7262         qlt_response_pkt_all_vps(vha, op->rsp, (response_t *)&op->atio);
7263         spin_unlock_irqrestore(&ha->hardware_lock, flags);
7264
7265         kfree(op);
7266 }
7267
7268 void
7269 qlt_handle_abts_recv(struct scsi_qla_host *vha, struct rsp_que *rsp,
7270     response_t *pkt)
7271 {
7272         struct qla_tgt_sess_op *op;
7273
7274         op = kzalloc(sizeof(*op), GFP_ATOMIC);
7275
7276         if (!op) {
7277                 /* do not reach for ATIO queue here.  This is best effort err
7278                  * recovery at this point.
7279                  */
7280                 qlt_response_pkt_all_vps(vha, rsp, pkt);
7281                 return;
7282         }
7283
7284         memcpy(&op->atio, pkt, sizeof(*pkt));
7285         op->vha = vha;
7286         op->chip_reset = vha->hw->base_qpair->chip_reset;
7287         op->rsp = rsp;
7288         INIT_WORK(&op->work, qlt_handle_abts_recv_work);
7289         queue_work(qla_tgt_wq, &op->work);
7290         return;
7291 }
7292
7293 int
7294 qlt_mem_alloc(struct qla_hw_data *ha)
7295 {
7296         if (!QLA_TGT_MODE_ENABLED())
7297                 return 0;
7298
7299         ha->tgt.tgt_vp_map = kcalloc(MAX_MULTI_ID_FABRIC,
7300                                      sizeof(struct qla_tgt_vp_map),
7301                                      GFP_KERNEL);
7302         if (!ha->tgt.tgt_vp_map)
7303                 return -ENOMEM;
7304
7305         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
7306             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
7307             &ha->tgt.atio_dma, GFP_KERNEL);
7308         if (!ha->tgt.atio_ring) {
7309                 kfree(ha->tgt.tgt_vp_map);
7310                 return -ENOMEM;
7311         }
7312         return 0;
7313 }
7314
7315 void
7316 qlt_mem_free(struct qla_hw_data *ha)
7317 {
7318         if (!QLA_TGT_MODE_ENABLED())
7319                 return;
7320
7321         if (ha->tgt.atio_ring) {
7322                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
7323                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
7324                     ha->tgt.atio_dma);
7325         }
7326         ha->tgt.atio_ring = NULL;
7327         ha->tgt.atio_dma = 0;
7328         kfree(ha->tgt.tgt_vp_map);
7329         ha->tgt.tgt_vp_map = NULL;
7330 }
7331
7332 /* vport_slock to be held by the caller */
7333 void
7334 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
7335 {
7336         void *slot;
7337         u32 key;
7338         int rc;
7339
7340         key = vha->d_id.b24;
7341
7342         switch (cmd) {
7343         case SET_VP_IDX:
7344                 if (!QLA_TGT_MODE_ENABLED())
7345                         return;
7346                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
7347                 break;
7348         case SET_AL_PA:
7349                 slot = btree_lookup32(&vha->hw->host_map, key);
7350                 if (!slot) {
7351                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf018,
7352                             "Save vha in host_map %p %06x\n", vha, key);
7353                         rc = btree_insert32(&vha->hw->host_map,
7354                                 key, vha, GFP_ATOMIC);
7355                         if (rc)
7356                                 ql_log(ql_log_info, vha, 0xd03e,
7357                                     "Unable to insert s_id into host_map: %06x\n",
7358                                     key);
7359                         return;
7360                 }
7361                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
7362                     "replace existing vha in host_map %p %06x\n", vha, key);
7363                 btree_update32(&vha->hw->host_map, key, vha);
7364                 break;
7365         case RESET_VP_IDX:
7366                 if (!QLA_TGT_MODE_ENABLED())
7367                         return;
7368                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
7369                 break;
7370         case RESET_AL_PA:
7371                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
7372                    "clear vha in host_map %p %06x\n", vha, key);
7373                 slot = btree_lookup32(&vha->hw->host_map, key);
7374                 if (slot)
7375                         btree_remove32(&vha->hw->host_map, key);
7376                 vha->d_id.b24 = 0;
7377                 break;
7378         }
7379 }
7380
7381 void qlt_update_host_map(struct scsi_qla_host *vha, port_id_t id)
7382 {
7383
7384         if (!vha->d_id.b24) {
7385                 vha->d_id = id;
7386                 qlt_update_vp_map(vha, SET_AL_PA);
7387         } else if (vha->d_id.b24 != id.b24) {
7388                 qlt_update_vp_map(vha, RESET_AL_PA);
7389                 vha->d_id = id;
7390                 qlt_update_vp_map(vha, SET_AL_PA);
7391         }
7392 }
7393
7394 static int __init qlt_parse_ini_mode(void)
7395 {
7396         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
7397                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
7398         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
7399                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
7400         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
7401                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
7402         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DUAL) == 0)
7403                 ql2x_ini_mode = QLA2XXX_INI_MODE_DUAL;
7404         else
7405                 return false;
7406
7407         return true;
7408 }
7409
7410 int __init qlt_init(void)
7411 {
7412         int ret;
7413
7414         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
7415         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
7416
7417         if (!qlt_parse_ini_mode()) {
7418                 ql_log(ql_log_fatal, NULL, 0xe06b,
7419                     "qlt_parse_ini_mode() failed\n");
7420                 return -EINVAL;
7421         }
7422
7423         if (!QLA_TGT_MODE_ENABLED())
7424                 return 0;
7425
7426         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
7427             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
7428             qla_tgt_mgmt_cmd), 0, NULL);
7429         if (!qla_tgt_mgmt_cmd_cachep) {
7430                 ql_log(ql_log_fatal, NULL, 0xd04b,
7431                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
7432                 return -ENOMEM;
7433         }
7434
7435         qla_tgt_plogi_cachep = kmem_cache_create("qla_tgt_plogi_cachep",
7436             sizeof(struct qlt_plogi_ack_t), __alignof__(struct qlt_plogi_ack_t),
7437             0, NULL);
7438
7439         if (!qla_tgt_plogi_cachep) {
7440                 ql_log(ql_log_fatal, NULL, 0xe06d,
7441                     "kmem_cache_create for qla_tgt_plogi_cachep failed\n");
7442                 ret = -ENOMEM;
7443                 goto out_mgmt_cmd_cachep;
7444         }
7445
7446         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
7447             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
7448         if (!qla_tgt_mgmt_cmd_mempool) {
7449                 ql_log(ql_log_fatal, NULL, 0xe06e,
7450                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
7451                 ret = -ENOMEM;
7452                 goto out_plogi_cachep;
7453         }
7454
7455         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
7456         if (!qla_tgt_wq) {
7457                 ql_log(ql_log_fatal, NULL, 0xe06f,
7458                     "alloc_workqueue for qla_tgt_wq failed\n");
7459                 ret = -ENOMEM;
7460                 goto out_cmd_mempool;
7461         }
7462         /*
7463          * Return 1 to signal that initiator-mode is being disabled
7464          */
7465         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
7466
7467 out_cmd_mempool:
7468         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7469 out_plogi_cachep:
7470         kmem_cache_destroy(qla_tgt_plogi_cachep);
7471 out_mgmt_cmd_cachep:
7472         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7473         return ret;
7474 }
7475
7476 void qlt_exit(void)
7477 {
7478         if (!QLA_TGT_MODE_ENABLED())
7479                 return;
7480
7481         destroy_workqueue(qla_tgt_wq);
7482         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
7483         kmem_cache_destroy(qla_tgt_plogi_cachep);
7484         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
7485 }