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