drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2011 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  46 module_param(qlini_mode, charp, S_IRUGO);
  47 MODULE_PARM_DESC(qlini_mode,
  48         "Determines when initiator mode will be enabled. Possible values: "
  49         "\"exclusive\" - initiator mode will be enabled on load, "
  50         "disabled on enabling target mode and then on disabling target mode "
  51         "enabled back; "
  52         "\"disabled\" - initiator mode will never be enabled; "
  53         "\"enabled\" (default) - initiator mode will always stay enabled.");
  54
  55 static int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  56
  57 /*
  58  * From scsi/fc/fc_fcp.h
  59  */
  60 enum fcp_resp_rsp_codes {
  61         FCP_TMF_CMPL = 0,
  62         FCP_DATA_LEN_INVALID = 1,
  63         FCP_CMND_FIELDS_INVALID = 2,
  64         FCP_DATA_PARAM_MISMATCH = 3,
  65         FCP_TMF_REJECTED = 4,
  66         FCP_TMF_FAILED = 5,
  67         FCP_TMF_INVALID_LUN = 9,
  68 };
  69
  70 /*
  71  * fc_pri_ta from scsi/fc/fc_fcp.h
  72  */
  73 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  74 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  75 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  76 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  77 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  78 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  79 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  80
  81 /*
  82  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  83  * must be called under HW lock and could unlock/lock it inside.
  84  * It isn't an issue, since in the current implementation on the time when
  85  * those functions are called:
  86  *
  87  *   - Either context is IRQ and only IRQ handler can modify HW data,
  88  *     including rings related fields,
  89  *
  90  *   - Or access to target mode variables from struct qla_tgt doesn't
  91  *     cross those functions boundaries, except tgt_stop, which
  92  *     additionally protected by irq_cmd_count.
  93  */
  94 /* Predefs for callbacks handed to qla2xxx LLD */
  95 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
  96         struct atio_from_isp *pkt);
  97 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
  98 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
  99         int fn, void *iocb, int flags);
 100 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 101         *cmd, struct atio_from_isp *atio, int ha_locked);
 102 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 103         struct qla_tgt_srr_imm *imm, int ha_lock);
 104 /*
 105  * Global Variables
 106  */
 107 static struct kmem_cache *qla_tgt_cmd_cachep;
 108 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 109 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 110 static struct workqueue_struct *qla_tgt_wq;
 111 static DEFINE_MUTEX(qla_tgt_mutex);
 112 static LIST_HEAD(qla_tgt_glist);
 113
 114 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 115 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 116         struct qla_tgt *tgt,
 117         const uint8_t *port_name)
 118 {
 119         struct qla_tgt_sess *sess;
 120
 121         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 122                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 123                         return sess;
 124         }
 125
 126         return NULL;
 127 }
 128
 129 /* Might release hw lock, then reaquire!! */
 130 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 131 {
 132         /* Send marker if required */
 133         if (unlikely(vha->marker_needed != 0)) {
 134                 int rc = qla2x00_issue_marker(vha, vha_locked);
 135                 if (rc != QLA_SUCCESS) {
 136                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 137                             "qla_target(%d): issue_marker() failed\n",
 138                             vha->vp_idx);
 139                 }
 140                 return rc;
 141         }
 142         return QLA_SUCCESS;
 143 }
 144
 145 static inline
 146 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 147         uint8_t *d_id)
 148 {
 149         struct qla_hw_data *ha = vha->hw;
 150         uint8_t vp_idx;
 151
 152         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 153                 return NULL;
 154
 155         if (vha->d_id.b.al_pa == d_id[2])
 156                 return vha;
 157
 158         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 159         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 160         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 161                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 162
 163         return NULL;
 164 }
 165
 166 static inline
 167 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 168         uint16_t vp_idx)
 169 {
 170         struct qla_hw_data *ha = vha->hw;
 171
 172         if (vha->vp_idx == vp_idx)
 173                 return vha;
 174
 175         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 176         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 177                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 178
 179         return NULL;
 180 }
 181
 182 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 183         struct atio_from_isp *atio)
 184 {
 185         switch (atio->u.raw.entry_type) {
 186         case ATIO_TYPE7:
 187         {
 188                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 189                     atio->u.isp24.fcp_hdr.d_id);
 190                 if (unlikely(NULL == host)) {
 191                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 192                             "qla_target(%d): Received ATIO_TYPE7 "
 193                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 194                             atio->u.isp24.fcp_hdr.d_id[0],
 195                             atio->u.isp24.fcp_hdr.d_id[1],
 196                             atio->u.isp24.fcp_hdr.d_id[2]);
 197                         break;
 198                 }
 199                 qlt_24xx_atio_pkt(host, atio);
 200                 break;
 201         }
 202
 203         case IMMED_NOTIFY_TYPE:
 204         {
 205                 struct scsi_qla_host *host = vha;
 206                 struct imm_ntfy_from_isp *entry =
 207                     (struct imm_ntfy_from_isp *)atio;
 208
 209                 if ((entry->u.isp24.vp_index != 0xFF) &&
 210                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 211                         host = qlt_find_host_by_vp_idx(vha,
 212                             entry->u.isp24.vp_index);
 213                         if (unlikely(!host)) {
 214                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 215                                     "qla_target(%d): Received "
 216                                     "ATIO (IMMED_NOTIFY_TYPE) "
 217                                     "with unknown vp_index %d\n",
 218                                     vha->vp_idx, entry->u.isp24.vp_index);
 219                                 break;
 220                         }
 221                 }
 222                 qlt_24xx_atio_pkt(host, atio);
 223                 break;
 224         }
 225
 226         default:
 227                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 228                     "qla_target(%d): Received unknown ATIO atio "
 229                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 230                 break;
 231         }
 232
 233         return;
 234 }
 235
 236 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 237 {
 238         switch (pkt->entry_type) {
 239         case CTIO_TYPE7:
 240         {
 241                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 242                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 243                     entry->vp_index);
 244                 if (unlikely(!host)) {
 245                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 246                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 247                             "received, with unknown vp_index %d\n",
 248                             vha->vp_idx, entry->vp_index);
 249                         break;
 250                 }
 251                 qlt_response_pkt(host, pkt);
 252                 break;
 253         }
 254
 255         case IMMED_NOTIFY_TYPE:
 256         {
 257                 struct scsi_qla_host *host = vha;
 258                 struct imm_ntfy_from_isp *entry =
 259                     (struct imm_ntfy_from_isp *)pkt;
 260
 261                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 262                 if (unlikely(!host)) {
 263                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 264                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 265                             "received, with unknown vp_index %d\n",
 266                             vha->vp_idx, entry->u.isp24.vp_index);
 267                         break;
 268                 }
 269                 qlt_response_pkt(host, pkt);
 270                 break;
 271         }
 272
 273         case NOTIFY_ACK_TYPE:
 274         {
 275                 struct scsi_qla_host *host = vha;
 276                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 277
 278                 if (0xFF != entry->u.isp24.vp_index) {
 279                         host = qlt_find_host_by_vp_idx(vha,
 280                             entry->u.isp24.vp_index);
 281                         if (unlikely(!host)) {
 282                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 283                                     "qla_target(%d): Response "
 284                                     "pkt (NOTIFY_ACK_TYPE) "
 285                                     "received, with unknown "
 286                                     "vp_index %d\n", vha->vp_idx,
 287                                     entry->u.isp24.vp_index);
 288                                 break;
 289                         }
 290                 }
 291                 qlt_response_pkt(host, pkt);
 292                 break;
 293         }
 294
 295         case ABTS_RECV_24XX:
 296         {
 297                 struct abts_recv_from_24xx *entry =
 298                     (struct abts_recv_from_24xx *)pkt;
 299                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 300                     entry->vp_index);
 301                 if (unlikely(!host)) {
 302                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 303                             "qla_target(%d): Response pkt "
 304                             "(ABTS_RECV_24XX) received, with unknown "
 305                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 306                         break;
 307                 }
 308                 qlt_response_pkt(host, pkt);
 309                 break;
 310         }
 311
 312         case ABTS_RESP_24XX:
 313         {
 314                 struct abts_resp_to_24xx *entry =
 315                     (struct abts_resp_to_24xx *)pkt;
 316                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 317                     entry->vp_index);
 318                 if (unlikely(!host)) {
 319                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 320                             "qla_target(%d): Response pkt "
 321                             "(ABTS_RECV_24XX) received, with unknown "
 322                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 323                         break;
 324                 }
 325                 qlt_response_pkt(host, pkt);
 326                 break;
 327         }
 328
 329         default:
 330                 qlt_response_pkt(vha, pkt);
 331                 break;
 332         }
 333
 334 }
 335
 336 static void qlt_free_session_done(struct work_struct *work)
 337 {
 338         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 339             free_work);
 340         struct qla_tgt *tgt = sess->tgt;
 341         struct scsi_qla_host *vha = sess->vha;
 342         struct qla_hw_data *ha = vha->hw;
 343
 344         BUG_ON(!tgt);
 345         /*
 346          * Release the target session for FC Nexus from fabric module code.
 347          */
 348         if (sess->se_sess != NULL)
 349                 ha->tgt.tgt_ops->free_session(sess);
 350
 351         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 352             "Unregistration of sess %p finished\n", sess);
 353
 354         kfree(sess);
 355         /*
 356          * We need to protect against race, when tgt is freed before or
 357          * inside wake_up()
 358          */
 359         tgt->sess_count--;
 360         if (tgt->sess_count == 0)
 361                 wake_up_all(&tgt->waitQ);
 362 }
 363
 364 /* ha->hardware_lock supposed to be held on entry */
 365 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 366 {
 367         struct scsi_qla_host *vha = sess->vha;
 368
 369         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 370
 371         list_del(&sess->sess_list_entry);
 372         if (sess->deleted)
 373                 list_del(&sess->del_list_entry);
 374
 375         INIT_WORK(&sess->free_work, qlt_free_session_done);
 376         schedule_work(&sess->free_work);
 377 }
 378 EXPORT_SYMBOL(qlt_unreg_sess);
 379
 380 /* ha->hardware_lock supposed to be held on entry */
 381 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 382 {
 383         struct qla_hw_data *ha = vha->hw;
 384         struct qla_tgt_sess *sess = NULL;
 385         uint32_t unpacked_lun, lun = 0;
 386         uint16_t loop_id;
 387         int res = 0;
 388         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 389         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 390
 391         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 392         if (loop_id == 0xFFFF) {
 393 #if 0 /* FIXME: Re-enable Global event handling.. */
 394                 /* Global event */
 395                 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
 396                 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
 397                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 398                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 399                             typeof(*sess), sess_list_entry);
 400                         switch (mcmd) {
 401                         case QLA_TGT_NEXUS_LOSS_SESS:
 402                                 mcmd = QLA_TGT_NEXUS_LOSS;
 403                                 break;
 404                         case QLA_TGT_ABORT_ALL_SESS:
 405                                 mcmd = QLA_TGT_ABORT_ALL;
 406                                 break;
 407                         case QLA_TGT_NEXUS_LOSS:
 408                         case QLA_TGT_ABORT_ALL:
 409                                 break;
 410                         default:
 411                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 412                                     "qla_target(%d): Not allowed "
 413                                     "command %x in %s", vha->vp_idx,
 414                                     mcmd, __func__);
 415                                 sess = NULL;
 416                                 break;
 417                         }
 418                 } else
 419                         sess = NULL;
 420 #endif
 421         } else {
 422                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 423         }
 424
 425         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 426             "Using sess for qla_tgt_reset: %p\n", sess);
 427         if (!sess) {
 428                 res = -ESRCH;
 429                 return res;
 430         }
 431
 432         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 433             "scsi(%ld): resetting (session %p from port "
 434             "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x, "
 435             "mcmd %x, loop_id %d)\n", vha->host_no, sess,
 436             sess->port_name[0], sess->port_name[1],
 437             sess->port_name[2], sess->port_name[3],
 438             sess->port_name[4], sess->port_name[5],
 439             sess->port_name[6], sess->port_name[7],
 440             mcmd, loop_id);
 441
 442         lun = a->u.isp24.fcp_cmnd.lun;
 443         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 444
 445         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 446             iocb, QLA24XX_MGMT_SEND_NACK);
 447 }
 448
 449 /* ha->hardware_lock supposed to be held on entry */
 450 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 451         bool immediate)
 452 {
 453         struct qla_tgt *tgt = sess->tgt;
 454         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 455
 456         if (sess->deleted)
 457                 return;
 458
 459         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 460             "Scheduling sess %p for deletion\n", sess);
 461         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 462         sess->deleted = 1;
 463
 464         if (immediate)
 465                 dev_loss_tmo = 0;
 466
 467         sess->expires = jiffies + dev_loss_tmo * HZ;
 468
 469         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 470             "qla_target(%d): session for port %02x:%02x:%02x:"
 471             "%02x:%02x:%02x:%02x:%02x (loop ID %d) scheduled for "
 472             "deletion in %u secs (expires: %lu) immed: %d\n",
 473             sess->vha->vp_idx,
 474             sess->port_name[0], sess->port_name[1],
 475             sess->port_name[2], sess->port_name[3],
 476             sess->port_name[4], sess->port_name[5],
 477             sess->port_name[6], sess->port_name[7],
 478             sess->loop_id, dev_loss_tmo, sess->expires, immediate);
 479
 480         if (immediate)
 481                 schedule_delayed_work(&tgt->sess_del_work, 0);
 482         else
 483                 schedule_delayed_work(&tgt->sess_del_work,
 484                     jiffies - sess->expires);
 485 }
 486
 487 /* ha->hardware_lock supposed to be held on entry */
 488 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
 489 {
 490         struct qla_tgt_sess *sess;
 491
 492         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 493                 qlt_schedule_sess_for_deletion(sess, true);
 494
 495         /* At this point tgt could be already dead */
 496 }
 497
 498 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 499         uint16_t *loop_id)
 500 {
 501         struct qla_hw_data *ha = vha->hw;
 502         dma_addr_t gid_list_dma;
 503         struct gid_list_info *gid_list;
 504         char *id_iter;
 505         int res, rc, i;
 506         uint16_t entries;
 507
 508         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 509             &gid_list_dma, GFP_KERNEL);
 510         if (!gid_list) {
 511                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 512                     "qla_target(%d): DMA Alloc failed of %u\n",
 513                     vha->vp_idx, qla2x00_gid_list_size(ha));
 514                 return -ENOMEM;
 515         }
 516
 517         /* Get list of logged in devices */
 518         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 519         if (rc != QLA_SUCCESS) {
 520                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 521                     "qla_target(%d): get_id_list() failed: %x\n",
 522                     vha->vp_idx, rc);
 523                 res = -1;
 524                 goto out_free_id_list;
 525         }
 526
 527         id_iter = (char *)gid_list;
 528         res = -1;
 529         for (i = 0; i < entries; i++) {
 530                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 531                 if ((gid->al_pa == s_id[2]) &&
 532                     (gid->area == s_id[1]) &&
 533                     (gid->domain == s_id[0])) {
 534                         *loop_id = le16_to_cpu(gid->loop_id);
 535                         res = 0;
 536                         break;
 537                 }
 538                 id_iter += ha->gid_list_info_size;
 539         }
 540
 541 out_free_id_list:
 542         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 543             gid_list, gid_list_dma);
 544         return res;
 545 }
 546
 547 static bool qlt_check_fcport_exist(struct scsi_qla_host *vha,
 548         struct qla_tgt_sess *sess)
 549 {
 550         struct qla_hw_data *ha = vha->hw;
 551         struct qla_port_24xx_data *pmap24;
 552         bool res, found = false;
 553         int rc, i;
 554         uint16_t loop_id = 0xFFFF; /* to eliminate compiler's warning */
 555         uint16_t entries;
 556         void *pmap;
 557         int pmap_len;
 558         fc_port_t *fcport;
 559         int global_resets;
 560         unsigned long flags;
 561
 562 retry:
 563         global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
 564
 565         rc = qla2x00_get_node_name_list(vha, &pmap, &pmap_len);
 566         if (rc != QLA_SUCCESS) {
 567                 res = false;
 568                 goto out;
 569         }
 570
 571         pmap24 = pmap;
 572         entries = pmap_len/sizeof(*pmap24);
 573
 574         for (i = 0; i < entries; ++i) {
 575                 if (!memcmp(sess->port_name, pmap24[i].port_name, WWN_SIZE)) {
 576                         loop_id = le16_to_cpu(pmap24[i].loop_id);
 577                         found = true;
 578                         break;
 579                 }
 580         }
 581
 582         kfree(pmap);
 583
 584         if (!found) {
 585                 res = false;
 586                 goto out;
 587         }
 588
 589         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf046,
 590             "qlt_check_fcport_exist(): loop_id %d", loop_id);
 591
 592         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
 593         if (fcport == NULL) {
 594                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf047,
 595                     "qla_target(%d): Allocation of tmp FC port failed",
 596                     vha->vp_idx);
 597                 res = false;
 598                 goto out;
 599         }
 600
 601         fcport->loop_id = loop_id;
 602
 603         rc = qla2x00_get_port_database(vha, fcport, 0);
 604         if (rc != QLA_SUCCESS) {
 605                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf048,
 606                     "qla_target(%d): Failed to retrieve fcport "
 607                     "information -- get_port_database() returned %x "
 608                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
 609                 res = false;
 610                 goto out_free_fcport;
 611         }
 612
 613         if (global_resets !=
 614             atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
 615                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
 616                     "qla_target(%d): global reset during session discovery"
 617                     " (counter was %d, new %d), retrying",
 618                     vha->vp_idx, global_resets,
 619                     atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
 620                 goto retry;
 621         }
 622
 623         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
 624             "Updating sess %p s_id %x:%x:%x, loop_id %d) to d_id %x:%x:%x, "
 625             "loop_id %d", sess, sess->s_id.b.domain, sess->s_id.b.al_pa,
 626             sess->s_id.b.area, sess->loop_id, fcport->d_id.b.domain,
 627             fcport->d_id.b.al_pa, fcport->d_id.b.area, fcport->loop_id);
 628
 629         spin_lock_irqsave(&ha->hardware_lock, flags);
 630         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 631                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 632         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 633
 634         res = true;
 635
 636 out_free_fcport:
 637         kfree(fcport);
 638
 639 out:
 640         return res;
 641 }
 642
 643 /* ha->hardware_lock supposed to be held on entry */
 644 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 645 {
 646         BUG_ON(!sess->deleted);
 647
 648         list_del(&sess->del_list_entry);
 649         sess->deleted = 0;
 650 }
 651
 652 static void qlt_del_sess_work_fn(struct delayed_work *work)
 653 {
 654         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 655             sess_del_work);
 656         struct scsi_qla_host *vha = tgt->vha;
 657         struct qla_hw_data *ha = vha->hw;
 658         struct qla_tgt_sess *sess;
 659         unsigned long flags;
 660
 661         spin_lock_irqsave(&ha->hardware_lock, flags);
 662         while (!list_empty(&tgt->del_sess_list)) {
 663                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 664                     del_list_entry);
 665                 if (time_after_eq(jiffies, sess->expires)) {
 666                         bool cancel;
 667
 668                         qlt_undelete_sess(sess);
 669
 670                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 671                         cancel = qlt_check_fcport_exist(vha, sess);
 672
 673                         if (cancel) {
 674                                 if (sess->deleted) {
 675                                         /*
 676                                          * sess was again deleted while we were
 677                                          * discovering it
 678                                          */
 679                                         spin_lock_irqsave(&ha->hardware_lock,
 680                                             flags);
 681                                         continue;
 682                                 }
 683
 684                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf049,
 685                                     "qla_target(%d): cancel deletion of "
 686                                     "session for port %02x:%02x:%02x:%02x:%02x:"
 687                                     "%02x:%02x:%02x (loop ID %d), because "
 688                                     " it isn't deleted by firmware",
 689                                     vha->vp_idx, sess->port_name[0],
 690                                     sess->port_name[1], sess->port_name[2],
 691                                     sess->port_name[3], sess->port_name[4],
 692                                     sess->port_name[5], sess->port_name[6],
 693                                     sess->port_name[7], sess->loop_id);
 694                         } else {
 695                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 696                                     "Timeout: sess %p about to be deleted\n",
 697                                     sess);
 698                                 ha->tgt.tgt_ops->shutdown_sess(sess);
 699                                 ha->tgt.tgt_ops->put_sess(sess);
 700                         }
 701
 702                         spin_lock_irqsave(&ha->hardware_lock, flags);
 703                 } else {
 704                         schedule_delayed_work(&tgt->sess_del_work,
 705                             jiffies - sess->expires);
 706                         break;
 707                 }
 708         }
 709         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 710 }
 711
 712 /*
 713  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 714  * Caller must put it.
 715  */
 716 static struct qla_tgt_sess *qlt_create_sess(
 717         struct scsi_qla_host *vha,
 718         fc_port_t *fcport,
 719         bool local)
 720 {
 721         struct qla_hw_data *ha = vha->hw;
 722         struct qla_tgt_sess *sess;
 723         unsigned long flags;
 724         unsigned char be_sid[3];
 725
 726         /* Check to avoid double sessions */
 727         spin_lock_irqsave(&ha->hardware_lock, flags);
 728         list_for_each_entry(sess, &ha->tgt.qla_tgt->sess_list,
 729                                 sess_list_entry) {
 730                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 731                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 732                             "Double sess %p found (s_id %x:%x:%x, "
 733                             "loop_id %d), updating to d_id %x:%x:%x, "
 734                             "loop_id %d", sess, sess->s_id.b.domain,
 735                             sess->s_id.b.al_pa, sess->s_id.b.area,
 736                             sess->loop_id, fcport->d_id.b.domain,
 737                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 738                             fcport->loop_id);
 739
 740                         if (sess->deleted)
 741                                 qlt_undelete_sess(sess);
 742
 743                         kref_get(&sess->se_sess->sess_kref);
 744                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 745                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 746
 747                         if (sess->local && !local)
 748                                 sess->local = 0;
 749                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 750
 751                         return sess;
 752                 }
 753         }
 754         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 755
 756         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 757         if (!sess) {
 758                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 759                     "qla_target(%u): session allocation failed, "
 760                     "all commands from port %02x:%02x:%02x:%02x:"
 761                     "%02x:%02x:%02x:%02x will be refused", vha->vp_idx,
 762                     fcport->port_name[0], fcport->port_name[1],
 763                     fcport->port_name[2], fcport->port_name[3],
 764                     fcport->port_name[4], fcport->port_name[5],
 765                     fcport->port_name[6], fcport->port_name[7]);
 766
 767                 return NULL;
 768         }
 769         sess->tgt = ha->tgt.qla_tgt;
 770         sess->vha = vha;
 771         sess->s_id = fcport->d_id;
 772         sess->loop_id = fcport->loop_id;
 773         sess->local = local;
 774
 775         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 776             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 777             sess, ha->tgt.qla_tgt);
 778
 779         be_sid[0] = sess->s_id.b.domain;
 780         be_sid[1] = sess->s_id.b.area;
 781         be_sid[2] = sess->s_id.b.al_pa;
 782         /*
 783          * Determine if this fc_port->port_name is allowed to access
 784          * target mode using explict NodeACLs+MappedLUNs, or using
 785          * TPG demo mode.  If this is successful a target mode FC nexus
 786          * is created.
 787          */
 788         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 789             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 790                 kfree(sess);
 791                 return NULL;
 792         }
 793         /*
 794          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 795          * access across ->hardware_lock reaquire.
 796          */
 797         kref_get(&sess->se_sess->sess_kref);
 798
 799         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 800         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 801         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 802
 803         spin_lock_irqsave(&ha->hardware_lock, flags);
 804         list_add_tail(&sess->sess_list_entry, &ha->tgt.qla_tgt->sess_list);
 805         ha->tgt.qla_tgt->sess_count++;
 806         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 807
 808         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 809             "qla_target(%d): %ssession for wwn %02x:%02x:%02x:%02x:"
 810             "%02x:%02x:%02x:%02x (loop_id %d, s_id %x:%x:%x, confirmed"
 811             " completion %ssupported) added\n",
 812             vha->vp_idx, local ?  "local " : "", fcport->port_name[0],
 813             fcport->port_name[1], fcport->port_name[2], fcport->port_name[3],
 814             fcport->port_name[4], fcport->port_name[5], fcport->port_name[6],
 815             fcport->port_name[7], fcport->loop_id, sess->s_id.b.domain,
 816             sess->s_id.b.area, sess->s_id.b.al_pa, sess->conf_compl_supported ?
 817             "" : "not ");
 818
 819         return sess;
 820 }
 821
 822 /*
 823  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 824  */
 825 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 826 {
 827         struct qla_hw_data *ha = vha->hw;
 828         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 829         struct qla_tgt_sess *sess;
 830         unsigned long flags;
 831
 832         if (!vha->hw->tgt.tgt_ops)
 833                 return;
 834
 835         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 836                 return;
 837
 838         spin_lock_irqsave(&ha->hardware_lock, flags);
 839         if (tgt->tgt_stop) {
 840                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 841                 return;
 842         }
 843         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 844         if (!sess) {
 845                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 846
 847                 mutex_lock(&ha->tgt.tgt_mutex);
 848                 sess = qlt_create_sess(vha, fcport, false);
 849                 mutex_unlock(&ha->tgt.tgt_mutex);
 850
 851                 spin_lock_irqsave(&ha->hardware_lock, flags);
 852         } else {
 853                 kref_get(&sess->se_sess->sess_kref);
 854
 855                 if (sess->deleted) {
 856                         qlt_undelete_sess(sess);
 857
 858                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 859                             "qla_target(%u): %ssession for port %02x:"
 860                             "%02x:%02x:%02x:%02x:%02x:%02x:%02x (loop ID %d) "
 861                             "reappeared\n", vha->vp_idx, sess->local ? "local "
 862                             : "", sess->port_name[0], sess->port_name[1],
 863                             sess->port_name[2], sess->port_name[3],
 864                             sess->port_name[4], sess->port_name[5],
 865                             sess->port_name[6], sess->port_name[7],
 866                             sess->loop_id);
 867
 868                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 869                             "Reappeared sess %p\n", sess);
 870                 }
 871                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 872                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 873         }
 874
 875         if (sess && sess->local) {
 876                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 877                     "qla_target(%u): local session for "
 878                     "port %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
 879                     "(loop ID %d) became global\n", vha->vp_idx,
 880                     fcport->port_name[0], fcport->port_name[1],
 881                     fcport->port_name[2], fcport->port_name[3],
 882                     fcport->port_name[4], fcport->port_name[5],
 883                     fcport->port_name[6], fcport->port_name[7],
 884                     sess->loop_id);
 885                 sess->local = 0;
 886         }
 887         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 888
 889         ha->tgt.tgt_ops->put_sess(sess);
 890 }
 891
 892 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 893 {
 894         struct qla_hw_data *ha = vha->hw;
 895         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 896         struct qla_tgt_sess *sess;
 897         unsigned long flags;
 898
 899         if (!vha->hw->tgt.tgt_ops)
 900                 return;
 901
 902         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 903                 return;
 904
 905         spin_lock_irqsave(&ha->hardware_lock, flags);
 906         if (tgt->tgt_stop) {
 907                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 908                 return;
 909         }
 910         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 911         if (!sess) {
 912                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 913                 return;
 914         }
 915
 916         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 917
 918         sess->local = 1;
 919         qlt_schedule_sess_for_deletion(sess, false);
 920         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 921 }
 922
 923 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 924 {
 925         struct qla_hw_data *ha = tgt->ha;
 926         unsigned long flags;
 927         int res;
 928         /*
 929          * We need to protect against race, when tgt is freed before or
 930          * inside wake_up()
 931          */
 932         spin_lock_irqsave(&ha->hardware_lock, flags);
 933         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 934             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 935             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 936         res = (tgt->sess_count == 0);
 937         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 938
 939         return res;
 940 }
 941
 942 /* Called by tcm_qla2xxx configfs code */
 943 void qlt_stop_phase1(struct qla_tgt *tgt)
 944 {
 945         struct scsi_qla_host *vha = tgt->vha;
 946         struct qla_hw_data *ha = tgt->ha;
 947         unsigned long flags;
 948
 949         if (tgt->tgt_stop || tgt->tgt_stopped) {
 950                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 951                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 952                 dump_stack();
 953                 return;
 954         }
 955
 956         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 957             vha->host_no, vha);
 958         /*
 959          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 960          * Lock is needed, because we still can get an incoming packet.
 961          */
 962         mutex_lock(&ha->tgt.tgt_mutex);
 963         spin_lock_irqsave(&ha->hardware_lock, flags);
 964         tgt->tgt_stop = 1;
 965         qlt_clear_tgt_db(tgt, true);
 966         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 967         mutex_unlock(&ha->tgt.tgt_mutex);
 968
 969         flush_delayed_work(&tgt->sess_del_work);
 970
 971         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 972             "Waiting for sess works (tgt %p)", tgt);
 973         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 974         while (!list_empty(&tgt->sess_works_list)) {
 975                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 976                 flush_scheduled_work();
 977                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 978         }
 979         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 980
 981         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 982             "Waiting for tgt %p: list_empty(sess_list)=%d "
 983             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 984             tgt->sess_count);
 985
 986         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 987
 988         /* Big hammer */
 989         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 990                 qlt_disable_vha(vha);
 991
 992         /* Wait for sessions to clear out (just in case) */
 993         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 994 }
 995 EXPORT_SYMBOL(qlt_stop_phase1);
 996
 997 /* Called by tcm_qla2xxx configfs code */
 998 void qlt_stop_phase2(struct qla_tgt *tgt)
 999 {
1000         struct qla_hw_data *ha = tgt->ha;
1001         unsigned long flags;
1002
1003         if (tgt->tgt_stopped) {
1004                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f,
1005                     "Already in tgt->tgt_stopped state\n");
1006                 dump_stack();
1007                 return;
1008         }
1009
1010         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b,
1011             "Waiting for %d IRQ commands to complete (tgt %p)",
1012             tgt->irq_cmd_count, tgt);
1013
1014         mutex_lock(&ha->tgt.tgt_mutex);
1015         spin_lock_irqsave(&ha->hardware_lock, flags);
1016         while (tgt->irq_cmd_count != 0) {
1017                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1018                 udelay(2);
1019                 spin_lock_irqsave(&ha->hardware_lock, flags);
1020         }
1021         tgt->tgt_stop = 0;
1022         tgt->tgt_stopped = 1;
1023         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1024         mutex_unlock(&ha->tgt.tgt_mutex);
1025
1026         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished",
1027             tgt);
1028 }
1029 EXPORT_SYMBOL(qlt_stop_phase2);
1030
1031 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1032 static void qlt_release(struct qla_tgt *tgt)
1033 {
1034         struct qla_hw_data *ha = tgt->ha;
1035
1036         if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1037                 qlt_stop_phase2(tgt);
1038
1039         ha->tgt.qla_tgt = NULL;
1040
1041         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00d,
1042             "Release of tgt %p finished\n", tgt);
1043
1044         kfree(tgt);
1045 }
1046
1047 /* ha->hardware_lock supposed to be held on entry */
1048 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1049         const void *param, unsigned int param_size)
1050 {
1051         struct qla_tgt_sess_work_param *prm;
1052         unsigned long flags;
1053
1054         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1055         if (!prm) {
1056                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1057                     "qla_target(%d): Unable to create session "
1058                     "work, command will be refused", 0);
1059                 return -ENOMEM;
1060         }
1061
1062         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1063             "Scheduling work (type %d, prm %p)"
1064             " to find session for param %p (size %d, tgt %p)\n",
1065             type, prm, param, param_size, tgt);
1066
1067         prm->type = type;
1068         memcpy(&prm->tm_iocb, param, param_size);
1069
1070         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1071         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1072         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1073
1074         schedule_work(&tgt->sess_work);
1075
1076         return 0;
1077 }
1078
1079 /*
1080  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1081  */
1082 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1083         struct imm_ntfy_from_isp *ntfy,
1084         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1085         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1086 {
1087         struct qla_hw_data *ha = vha->hw;
1088         request_t *pkt;
1089         struct nack_to_isp *nack;
1090
1091         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1092
1093         /* Send marker if required */
1094         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1095                 return;
1096
1097         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1098         if (!pkt) {
1099                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1100                     "qla_target(%d): %s failed: unable to allocate "
1101                     "request packet\n", vha->vp_idx, __func__);
1102                 return;
1103         }
1104
1105         if (ha->tgt.qla_tgt != NULL)
1106                 ha->tgt.qla_tgt->notify_ack_expected++;
1107
1108         pkt->entry_type = NOTIFY_ACK_TYPE;
1109         pkt->entry_count = 1;
1110
1111         nack = (struct nack_to_isp *)pkt;
1112         nack->ox_id = ntfy->ox_id;
1113
1114         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1115         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1116                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1117                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1118         }
1119         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1120         nack->u.isp24.status = ntfy->u.isp24.status;
1121         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1122         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1123         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1124         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1125         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1126         nack->u.isp24.srr_reject_code = srr_reject_code;
1127         nack->u.isp24.srr_reject_code_expl = srr_explan;
1128         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1129
1130         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1131             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1132             vha->vp_idx, nack->u.isp24.status);
1133
1134         qla2x00_start_iocbs(vha, vha->req);
1135 }
1136
1137 /*
1138  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1139  */
1140 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1141         struct abts_recv_from_24xx *abts, uint32_t status,
1142         bool ids_reversed)
1143 {
1144         struct qla_hw_data *ha = vha->hw;
1145         struct abts_resp_to_24xx *resp;
1146         uint32_t f_ctl;
1147         uint8_t *p;
1148
1149         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1150             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1151             ha, abts, status);
1152
1153         /* Send marker if required */
1154         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1155                 return;
1156
1157         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1158         if (!resp) {
1159                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1160                     "qla_target(%d): %s failed: unable to allocate "
1161                     "request packet", vha->vp_idx, __func__);
1162                 return;
1163         }
1164
1165         resp->entry_type = ABTS_RESP_24XX;
1166         resp->entry_count = 1;
1167         resp->nport_handle = abts->nport_handle;
1168         resp->vp_index = vha->vp_idx;
1169         resp->sof_type = abts->sof_type;
1170         resp->exchange_address = abts->exchange_address;
1171         resp->fcp_hdr_le = abts->fcp_hdr_le;
1172         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1173             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1174             F_CTL_SEQ_INITIATIVE);
1175         p = (uint8_t *)&f_ctl;
1176         resp->fcp_hdr_le.f_ctl[0] = *p++;
1177         resp->fcp_hdr_le.f_ctl[1] = *p++;
1178         resp->fcp_hdr_le.f_ctl[2] = *p;
1179         if (ids_reversed) {
1180                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1181                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1182                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1183                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1184                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1185                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1186         } else {
1187                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1188                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1189                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1190                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1191                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1192                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1193         }
1194         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1195         if (status == FCP_TMF_CMPL) {
1196                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1197                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1198                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1199                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1200                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1201                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1202         } else {
1203                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1204                 resp->payload.ba_rjt.reason_code =
1205                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1206                 /* Other bytes are zero */
1207         }
1208
1209         ha->tgt.qla_tgt->abts_resp_expected++;
1210
1211         qla2x00_start_iocbs(vha, vha->req);
1212 }
1213
1214 /*
1215  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1216  */
1217 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1218         struct abts_resp_from_24xx_fw *entry)
1219 {
1220         struct ctio7_to_24xx *ctio;
1221
1222         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1223             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1224         /* Send marker if required */
1225         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1226                 return;
1227
1228         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1229         if (ctio == NULL) {
1230                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1231                     "qla_target(%d): %s failed: unable to allocate "
1232                     "request packet\n", vha->vp_idx, __func__);
1233                 return;
1234         }
1235
1236         /*
1237          * We've got on entrance firmware's response on by us generated
1238          * ABTS response. So, in it ID fields are reversed.
1239          */
1240
1241         ctio->entry_type = CTIO_TYPE7;
1242         ctio->entry_count = 1;
1243         ctio->nport_handle = entry->nport_handle;
1244         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1245         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1246         ctio->vp_index = vha->vp_idx;
1247         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1248         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1249         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1250         ctio->exchange_addr = entry->exchange_addr_to_abort;
1251         ctio->u.status1.flags =
1252             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1253                 CTIO7_FLAGS_TERMINATE);
1254         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1255
1256         qla2x00_start_iocbs(vha, vha->req);
1257
1258         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1259             FCP_TMF_CMPL, true);
1260 }
1261
1262 /* ha->hardware_lock supposed to be held on entry */
1263 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1264         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1265 {
1266         struct qla_hw_data *ha = vha->hw;
1267         struct se_session *se_sess = sess->se_sess;
1268         struct qla_tgt_mgmt_cmd *mcmd;
1269         struct se_cmd *se_cmd;
1270         u32 lun = 0;
1271         int rc;
1272         bool found_lun = false;
1273
1274         spin_lock(&se_sess->sess_cmd_lock);
1275         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1276                 struct qla_tgt_cmd *cmd =
1277                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1278                 if (cmd->tag == abts->exchange_addr_to_abort) {
1279                         lun = cmd->unpacked_lun;
1280                         found_lun = true;
1281                         break;
1282                 }
1283         }
1284         spin_unlock(&se_sess->sess_cmd_lock);
1285
1286         if (!found_lun)
1287                 return -ENOENT;
1288
1289         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1290             "qla_target(%d): task abort (tag=%d)\n",
1291             vha->vp_idx, abts->exchange_addr_to_abort);
1292
1293         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1294         if (mcmd == NULL) {
1295                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1296                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1297                     vha->vp_idx, __func__);
1298                 return -ENOMEM;
1299         }
1300         memset(mcmd, 0, sizeof(*mcmd));
1301
1302         mcmd->sess = sess;
1303         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1304
1305         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1306             abts->exchange_addr_to_abort);
1307         if (rc != 0) {
1308                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1309                     "qla_target(%d):  tgt_ops->handle_tmr()"
1310                     " failed: %d", vha->vp_idx, rc);
1311                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1312                 return -EFAULT;
1313         }
1314
1315         return 0;
1316 }
1317
1318 /*
1319  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1320  */
1321 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1322         struct abts_recv_from_24xx *abts)
1323 {
1324         struct qla_hw_data *ha = vha->hw;
1325         struct qla_tgt_sess *sess;
1326         uint32_t tag = abts->exchange_addr_to_abort;
1327         uint8_t s_id[3];
1328         int rc;
1329
1330         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1331                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1332                     "qla_target(%d): ABTS: Abort Sequence not "
1333                     "supported\n", vha->vp_idx);
1334                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1335                 return;
1336         }
1337
1338         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1339                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1340                     "qla_target(%d): ABTS: Unknown Exchange "
1341                     "Address received\n", vha->vp_idx);
1342                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1343                 return;
1344         }
1345
1346         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1347             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1348             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1349             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1350             le32_to_cpu(abts->fcp_hdr_le.parameter));
1351
1352         s_id[0] = abts->fcp_hdr_le.s_id[2];
1353         s_id[1] = abts->fcp_hdr_le.s_id[1];
1354         s_id[2] = abts->fcp_hdr_le.s_id[0];
1355
1356         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1357         if (!sess) {
1358                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1359                     "qla_target(%d): task abort for non-existant session\n",
1360                     vha->vp_idx);
1361                 rc = qlt_sched_sess_work(ha->tgt.qla_tgt,
1362                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1363                 if (rc != 0) {
1364                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1365                             false);
1366                 }
1367                 return;
1368         }
1369
1370         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1371         if (rc != 0) {
1372                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1373                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1374                     vha->vp_idx, rc);
1375                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1376                 return;
1377         }
1378 }
1379
1380 /*
1381  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1382  */
1383 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1384         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1385 {
1386         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1387         struct ctio7_to_24xx *ctio;
1388
1389         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1390             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1391             ha, atio, resp_code);
1392
1393         /* Send marker if required */
1394         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1395                 return;
1396
1397         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1398         if (ctio == NULL) {
1399                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1400                     "qla_target(%d): %s failed: unable to allocate "
1401                     "request packet\n", ha->vp_idx, __func__);
1402                 return;
1403         }
1404
1405         ctio->entry_type = CTIO_TYPE7;
1406         ctio->entry_count = 1;
1407         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1408         ctio->nport_handle = mcmd->sess->loop_id;
1409         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1410         ctio->vp_index = ha->vp_idx;
1411         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1412         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1413         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1414         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1415         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1416             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1417                 CTIO7_FLAGS_SEND_STATUS);
1418         ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1419         ctio->u.status1.scsi_status =
1420             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1421         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1422         ctio->u.status1.sense_data[0] = resp_code;
1423
1424         qla2x00_start_iocbs(ha, ha->req);
1425 }
1426
1427 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1428 {
1429         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1430 }
1431 EXPORT_SYMBOL(qlt_free_mcmd);
1432
1433 /* callback from target fabric module code */
1434 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1435 {
1436         struct scsi_qla_host *vha = mcmd->sess->vha;
1437         struct qla_hw_data *ha = vha->hw;
1438         unsigned long flags;
1439
1440         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1441             "TM response mcmd (%p) status %#x state %#x",
1442             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1443
1444         spin_lock_irqsave(&ha->hardware_lock, flags);
1445         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1446                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1447                     0, 0, 0, 0, 0, 0);
1448         else {
1449                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1450                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1451                             mcmd->fc_tm_rsp, false);
1452                 else
1453                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1454                             mcmd->fc_tm_rsp);
1455         }
1456         /*
1457          * Make the callback for ->free_mcmd() to queue_work() and invoke
1458          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1459          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1460          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1461          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1462          * qlt_xmit_tm_rsp() returns here..
1463          */
1464         ha->tgt.tgt_ops->free_mcmd(mcmd);
1465         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1466 }
1467 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1468
1469 /* No locks */
1470 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1471 {
1472         struct qla_tgt_cmd *cmd = prm->cmd;
1473
1474         BUG_ON(cmd->sg_cnt == 0);
1475
1476         prm->sg = (struct scatterlist *)cmd->sg;
1477         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1478             cmd->sg_cnt, cmd->dma_data_direction);
1479         if (unlikely(prm->seg_cnt == 0))
1480                 goto out_err;
1481
1482         prm->cmd->sg_mapped = 1;
1483
1484         /*
1485          * If greater than four sg entries then we need to allocate
1486          * the continuation entries
1487          */
1488         if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1489                 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1490                     prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1491
1492         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1493             prm->seg_cnt, prm->req_cnt);
1494         return 0;
1495
1496 out_err:
1497         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1498             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1499             0, prm->cmd->sg_cnt);
1500         return -1;
1501 }
1502
1503 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1504         struct qla_tgt_cmd *cmd)
1505 {
1506         struct qla_hw_data *ha = vha->hw;
1507
1508         BUG_ON(!cmd->sg_mapped);
1509         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1510         cmd->sg_mapped = 0;
1511 }
1512
1513 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1514         uint32_t req_cnt)
1515 {
1516         struct qla_hw_data *ha = vha->hw;
1517         device_reg_t __iomem *reg = ha->iobase;
1518         uint32_t cnt;
1519
1520         if (vha->req->cnt < (req_cnt + 2)) {
1521                 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1522
1523                 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1524                     "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1525                     "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1526                     vha->req->ring_index, vha->req->cnt, req_cnt);
1527                 if  (vha->req->ring_index < cnt)
1528                         vha->req->cnt = cnt - vha->req->ring_index;
1529                 else
1530                         vha->req->cnt = vha->req->length -
1531                             (vha->req->ring_index - cnt);
1532         }
1533
1534         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1535                 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1536                     "qla_target(%d): There is no room in the "
1537                     "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1538                     "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1539                     vha->req->cnt, req_cnt);
1540                 return -EAGAIN;
1541         }
1542         vha->req->cnt -= req_cnt;
1543
1544         return 0;
1545 }
1546
1547 /*
1548  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1549  */
1550 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1551 {
1552         /* Adjust ring index. */
1553         vha->req->ring_index++;
1554         if (vha->req->ring_index == vha->req->length) {
1555                 vha->req->ring_index = 0;
1556                 vha->req->ring_ptr = vha->req->ring;
1557         } else {
1558                 vha->req->ring_ptr++;
1559         }
1560         return (cont_entry_t *)vha->req->ring_ptr;
1561 }
1562
1563 /* ha->hardware_lock supposed to be held on entry */
1564 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1565 {
1566         struct qla_hw_data *ha = vha->hw;
1567         uint32_t h;
1568
1569         h = ha->tgt.current_handle;
1570         /* always increment cmd handle */
1571         do {
1572                 ++h;
1573                 if (h > MAX_OUTSTANDING_COMMANDS)
1574                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1575                 if (h == ha->tgt.current_handle) {
1576                         ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1577                             "qla_target(%d): Ran out of "
1578                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1579                         h = QLA_TGT_NULL_HANDLE;
1580                         break;
1581                 }
1582         } while ((h == QLA_TGT_NULL_HANDLE) ||
1583             (h == QLA_TGT_SKIP_HANDLE) ||
1584             (ha->tgt.cmds[h-1] != NULL));
1585
1586         if (h != QLA_TGT_NULL_HANDLE)
1587                 ha->tgt.current_handle = h;
1588
1589         return h;
1590 }
1591
1592 /* ha->hardware_lock supposed to be held on entry */
1593 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1594         struct scsi_qla_host *vha)
1595 {
1596         uint32_t h;
1597         struct ctio7_to_24xx *pkt;
1598         struct qla_hw_data *ha = vha->hw;
1599         struct atio_from_isp *atio = &prm->cmd->atio;
1600
1601         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1602         prm->pkt = pkt;
1603         memset(pkt, 0, sizeof(*pkt));
1604
1605         pkt->entry_type = CTIO_TYPE7;
1606         pkt->entry_count = (uint8_t)prm->req_cnt;
1607         pkt->vp_index = vha->vp_idx;
1608
1609         h = qlt_make_handle(vha);
1610         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1611                 /*
1612                  * CTIO type 7 from the firmware doesn't provide a way to
1613                  * know the initiator's LOOP ID, hence we can't find
1614                  * the session and, so, the command.
1615                  */
1616                 return -EAGAIN;
1617         } else
1618                 ha->tgt.cmds[h-1] = prm->cmd;
1619
1620         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1621         pkt->nport_handle = prm->cmd->loop_id;
1622         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1623         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1624         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1625         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1626         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1627         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1628         pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1629         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1630
1631         ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1632             "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1633             vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1634             le16_to_cpu(pkt->u.status0.ox_id));
1635         return 0;
1636 }
1637
1638 /*
1639  * ha->hardware_lock supposed to be held on entry. We have already made sure
1640  * that there is sufficient amount of request entries to not drop it.
1641  */
1642 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1643         struct scsi_qla_host *vha)
1644 {
1645         int cnt;
1646         uint32_t *dword_ptr;
1647         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1648
1649         /* Build continuation packets */
1650         while (prm->seg_cnt > 0) {
1651                 cont_a64_entry_t *cont_pkt64 =
1652                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1653
1654                 /*
1655                  * Make sure that from cont_pkt64 none of
1656                  * 64-bit specific fields used for 32-bit
1657                  * addressing. Cast to (cont_entry_t *) for
1658                  * that.
1659                  */
1660
1661                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1662
1663                 cont_pkt64->entry_count = 1;
1664                 cont_pkt64->sys_define = 0;
1665
1666                 if (enable_64bit_addressing) {
1667                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1668                         dword_ptr =
1669                             (uint32_t *)&cont_pkt64->dseg_0_address;
1670                 } else {
1671                         cont_pkt64->entry_type = CONTINUE_TYPE;
1672                         dword_ptr =
1673                             (uint32_t *)&((cont_entry_t *)
1674                                 cont_pkt64)->dseg_0_address;
1675                 }
1676
1677                 /* Load continuation entry data segments */
1678                 for (cnt = 0;
1679                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1680                     cnt++, prm->seg_cnt--) {
1681                         *dword_ptr++ =
1682                             cpu_to_le32(pci_dma_lo32
1683                                 (sg_dma_address(prm->sg)));
1684                         if (enable_64bit_addressing) {
1685                                 *dword_ptr++ =
1686                                     cpu_to_le32(pci_dma_hi32
1687                                         (sg_dma_address
1688                                         (prm->sg)));
1689                         }
1690                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1691
1692                         ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1693                             "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1694                             (long long unsigned int)
1695                             pci_dma_hi32(sg_dma_address(prm->sg)),
1696                             (long long unsigned int)
1697                             pci_dma_lo32(sg_dma_address(prm->sg)),
1698                             (int)sg_dma_len(prm->sg));
1699
1700                         prm->sg = sg_next(prm->sg);
1701                 }
1702         }
1703 }
1704
1705 /*
1706  * ha->hardware_lock supposed to be held on entry. We have already made sure
1707  * that there is sufficient amount of request entries to not drop it.
1708  */
1709 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1710         struct scsi_qla_host *vha)
1711 {
1712         int cnt;
1713         uint32_t *dword_ptr;
1714         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1715         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1716
1717         ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1718             "iocb->scsi_status=%x, iocb->flags=%x\n",
1719             le16_to_cpu(pkt24->u.status0.scsi_status),
1720             le16_to_cpu(pkt24->u.status0.flags));
1721
1722         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1723
1724         /* Setup packet address segment pointer */
1725         dword_ptr = pkt24->u.status0.dseg_0_address;
1726
1727         /* Set total data segment count */
1728         if (prm->seg_cnt)
1729                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1730
1731         if (prm->seg_cnt == 0) {
1732                 /* No data transfer */
1733                 *dword_ptr++ = 0;
1734                 *dword_ptr = 0;
1735                 return;
1736         }
1737
1738         /* If scatter gather */
1739         ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1740
1741         /* Load command entry data segments */
1742         for (cnt = 0;
1743             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1744             cnt++, prm->seg_cnt--) {
1745                 *dword_ptr++ =
1746                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1747                 if (enable_64bit_addressing) {
1748                         *dword_ptr++ =
1749                             cpu_to_le32(pci_dma_hi32(
1750                                 sg_dma_address(prm->sg)));
1751                 }
1752                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1753
1754                 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1755                     "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1756                     (long long unsigned int)pci_dma_hi32(sg_dma_address(
1757                     prm->sg)),
1758                     (long long unsigned int)pci_dma_lo32(sg_dma_address(
1759                     prm->sg)),
1760                     (int)sg_dma_len(prm->sg));
1761
1762                 prm->sg = sg_next(prm->sg);
1763         }
1764
1765         qlt_load_cont_data_segments(prm, vha);
1766 }
1767
1768 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1769 {
1770         return cmd->bufflen > 0;
1771 }
1772
1773 /*
1774  * Called without ha->hardware_lock held
1775  */
1776 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1777         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1778         uint32_t *full_req_cnt)
1779 {
1780         struct qla_tgt *tgt = cmd->tgt;
1781         struct scsi_qla_host *vha = tgt->vha;
1782         struct qla_hw_data *ha = vha->hw;
1783         struct se_cmd *se_cmd = &cmd->se_cmd;
1784
1785         if (unlikely(cmd->aborted)) {
1786                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1787                     "qla_target(%d): terminating exchange "
1788                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1789                     se_cmd, cmd->tag);
1790
1791                 cmd->state = QLA_TGT_STATE_ABORTED;
1792
1793                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1794
1795                 /* !! At this point cmd could be already freed !! */
1796                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1797         }
1798
1799         ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1800             vha->vp_idx, cmd->tag);
1801
1802         prm->cmd = cmd;
1803         prm->tgt = tgt;
1804         prm->rq_result = scsi_status;
1805         prm->sense_buffer = &cmd->sense_buffer[0];
1806         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1807         prm->sg = NULL;
1808         prm->seg_cnt = -1;
1809         prm->req_cnt = 1;
1810         prm->add_status_pkt = 0;
1811
1812         ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1813             prm->rq_result, xmit_type);
1814
1815         /* Send marker if required */
1816         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1817                 return -EFAULT;
1818
1819         ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1820
1821         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1822                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1823                         return -EAGAIN;
1824         }
1825
1826         *full_req_cnt = prm->req_cnt;
1827
1828         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1829                 prm->residual = se_cmd->residual_count;
1830                 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1831                     "Residual underflow: %d (tag %d, "
1832                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1833                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1834                     cmd->bufflen, prm->rq_result);
1835                 prm->rq_result |= SS_RESIDUAL_UNDER;
1836         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1837                 prm->residual = se_cmd->residual_count;
1838                 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1839                     "Residual overflow: %d (tag %d, "
1840                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1841                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1842                     cmd->bufflen, prm->rq_result);
1843                 prm->rq_result |= SS_RESIDUAL_OVER;
1844         }
1845
1846         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1847                 /*
1848                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1849                  * ignored in *xmit_response() below
1850                  */
1851                 if (qlt_has_data(cmd)) {
1852                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1853                             (IS_FWI2_CAPABLE(ha) &&
1854                             (prm->rq_result != 0))) {
1855                                 prm->add_status_pkt = 1;
1856                                 (*full_req_cnt)++;
1857                         }
1858                 }
1859         }
1860
1861         ql_dbg(ql_dbg_tgt, vha, 0xe016,
1862             "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1863             prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1864
1865         return 0;
1866 }
1867
1868 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1869         struct qla_tgt_cmd *cmd, int sending_sense)
1870 {
1871         if (ha->tgt.enable_class_2)
1872                 return 0;
1873
1874         if (sending_sense)
1875                 return cmd->conf_compl_supported;
1876         else
1877                 return ha->tgt.enable_explicit_conf &&
1878                     cmd->conf_compl_supported;
1879 }
1880
1881 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1882 /*
1883  *  Original taken from the XFS code
1884  */
1885 static unsigned long qlt_srr_random(void)
1886 {
1887         static int Inited;
1888         static unsigned long RandomValue;
1889         static DEFINE_SPINLOCK(lock);
1890         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1891         register long rv;
1892         register long lo;
1893         register long hi;
1894         unsigned long flags;
1895
1896         spin_lock_irqsave(&lock, flags);
1897         if (!Inited) {
1898                 RandomValue = jiffies;
1899                 Inited = 1;
1900         }
1901         rv = RandomValue;
1902         hi = rv / 127773;
1903         lo = rv % 127773;
1904         rv = 16807 * lo - 2836 * hi;
1905         if (rv <= 0)
1906                 rv += 2147483647;
1907         RandomValue = rv;
1908         spin_unlock_irqrestore(&lock, flags);
1909         return rv;
1910 }
1911
1912 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1913 {
1914 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1915         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1916             == 50) {
1917                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1918                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1919                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1920         }
1921 #endif
1922         /*
1923          * It's currently not possible to simulate SRRs for FCP_WRITE without
1924          * a physical link layer failure, so don't even try here..
1925          */
1926         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1927                 return;
1928
1929         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1930             ((qlt_srr_random() % 100) == 20)) {
1931                 int i, leave = 0;
1932                 unsigned int tot_len = 0;
1933
1934                 while (leave == 0)
1935                         leave = qlt_srr_random() % cmd->sg_cnt;
1936
1937                 for (i = 0; i < leave; i++)
1938                         tot_len += cmd->sg[i].length;
1939
1940                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1941                     "Cutting cmd %p (tag %d) buffer"
1942                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1943                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1944                     cmd->bufflen, cmd->sg_cnt);
1945
1946                 cmd->bufflen = tot_len;
1947                 cmd->sg_cnt = leave;
1948         }
1949
1950         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1951                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1952
1953                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1954                     "Cutting cmd %p (tag %d) buffer head "
1955                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1956                     cmd->bufflen);
1957                 if (offset == 0)
1958                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1959                 else if (qlt_set_data_offset(cmd, offset)) {
1960                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1961                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1962                 }
1963         }
1964 }
1965 #else
1966 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1967 {}
1968 #endif
1969
1970 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1971         struct qla_tgt_prm *prm)
1972 {
1973         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1974             (uint32_t)sizeof(ctio->u.status1.sense_data));
1975         ctio->u.status0.flags |=
1976             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1977         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1978                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1979                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1980                     CTIO7_FLAGS_CONFORM_REQ);
1981         }
1982         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1983         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1984         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1985                 int i;
1986
1987                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1988                         if (prm->cmd->se_cmd.scsi_status != 0) {
1989                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1990                                     "Skipping EXPLICIT_CONFORM and "
1991                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1992                                     "non GOOD status\n");
1993                                 goto skip_explict_conf;
1994                         }
1995                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1996                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1997                             CTIO7_FLAGS_CONFORM_REQ);
1998                 }
1999 skip_explict_conf:
2000                 ctio->u.status1.flags &=
2001                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2002                 ctio->u.status1.flags |=
2003                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2004                 ctio->u.status1.scsi_status |=
2005                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
2006                 ctio->u.status1.sense_length =
2007                     cpu_to_le16(prm->sense_buffer_len);
2008                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2009                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2010                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2011 #if 0
2012                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2013                         static int q;
2014                         if (q < 10) {
2015                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2016                                     "qla_target(%d): %d bytes of sense "
2017                                     "lost", prm->tgt->ha->vp_idx,
2018                                     prm->sense_buffer_len % 4);
2019                                 q++;
2020                         }
2021                 }
2022 #endif
2023         } else {
2024                 ctio->u.status1.flags &=
2025                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2026                 ctio->u.status1.flags |=
2027                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2028                 ctio->u.status1.sense_length = 0;
2029                 memset(ctio->u.status1.sense_data, 0,
2030                     sizeof(ctio->u.status1.sense_data));
2031         }
2032
2033         /* Sense with len > 24, is it possible ??? */
2034 }
2035
2036 /*
2037  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2038  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2039  */
2040 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2041         uint8_t scsi_status)
2042 {
2043         struct scsi_qla_host *vha = cmd->vha;
2044         struct qla_hw_data *ha = vha->hw;
2045         struct ctio7_to_24xx *pkt;
2046         struct qla_tgt_prm prm;
2047         uint32_t full_req_cnt = 0;
2048         unsigned long flags = 0;
2049         int res;
2050
2051         memset(&prm, 0, sizeof(prm));
2052         qlt_check_srr_debug(cmd, &xmit_type);
2053
2054         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2055             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
2056             "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
2057             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
2058
2059         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2060             &full_req_cnt);
2061         if (unlikely(res != 0)) {
2062                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2063                         return 0;
2064
2065                 return res;
2066         }
2067
2068         spin_lock_irqsave(&ha->hardware_lock, flags);
2069
2070         /* Does F/W have an IOCBs for this request */
2071         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2072         if (unlikely(res))
2073                 goto out_unmap_unlock;
2074
2075         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2076         if (unlikely(res != 0))
2077                 goto out_unmap_unlock;
2078
2079
2080         pkt = (struct ctio7_to_24xx *)prm.pkt;
2081
2082         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2083                 pkt->u.status0.flags |=
2084                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2085                         CTIO7_FLAGS_STATUS_MODE_0);
2086
2087                 qlt_load_data_segments(&prm, vha);
2088
2089                 if (prm.add_status_pkt == 0) {
2090                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2091                                 pkt->u.status0.scsi_status =
2092                                     cpu_to_le16(prm.rq_result);
2093                                 pkt->u.status0.residual =
2094                                     cpu_to_le32(prm.residual);
2095                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2096                                     CTIO7_FLAGS_SEND_STATUS);
2097                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2098                                         pkt->u.status0.flags |=
2099                                             __constant_cpu_to_le16(
2100                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2101                                                 CTIO7_FLAGS_CONFORM_REQ);
2102                                 }
2103                         }
2104
2105                 } else {
2106                         /*
2107                          * We have already made sure that there is sufficient
2108                          * amount of request entries to not drop HW lock in
2109                          * req_pkt().
2110                          */
2111                         struct ctio7_to_24xx *ctio =
2112                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2113
2114                         ql_dbg(ql_dbg_tgt, vha, 0xe019,
2115                             "Building additional status packet\n");
2116
2117                         memcpy(ctio, pkt, sizeof(*ctio));
2118                         ctio->entry_count = 1;
2119                         ctio->dseg_count = 0;
2120                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2121                             CTIO7_FLAGS_DATA_IN);
2122
2123                         /* Real finish is ctio_m1's finish */
2124                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2125                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2126                             CTIO7_FLAGS_DONT_RET_CTIO);
2127                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2128                             &prm);
2129                         pr_debug("Status CTIO7: %p\n", ctio);
2130                 }
2131         } else
2132                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2133
2134
2135         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2136
2137         ql_dbg(ql_dbg_tgt, vha, 0xe01a,
2138             "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
2139             pkt, scsi_status);
2140
2141         qla2x00_start_iocbs(vha, vha->req);
2142         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2143
2144         return 0;
2145
2146 out_unmap_unlock:
2147         if (cmd->sg_mapped)
2148                 qlt_unmap_sg(vha, cmd);
2149         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2150
2151         return res;
2152 }
2153 EXPORT_SYMBOL(qlt_xmit_response);
2154
2155 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2156 {
2157         struct ctio7_to_24xx *pkt;
2158         struct scsi_qla_host *vha = cmd->vha;
2159         struct qla_hw_data *ha = vha->hw;
2160         struct qla_tgt *tgt = cmd->tgt;
2161         struct qla_tgt_prm prm;
2162         unsigned long flags;
2163         int res = 0;
2164
2165         memset(&prm, 0, sizeof(prm));
2166         prm.cmd = cmd;
2167         prm.tgt = tgt;
2168         prm.sg = NULL;
2169         prm.req_cnt = 1;
2170
2171         /* Send marker if required */
2172         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2173                 return -EIO;
2174
2175         ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2176             (int)vha->vp_idx);
2177
2178         /* Calculate number of entries and segments required */
2179         if (qlt_pci_map_calc_cnt(&prm) != 0)
2180                 return -EAGAIN;
2181
2182         spin_lock_irqsave(&ha->hardware_lock, flags);
2183
2184         /* Does F/W have an IOCBs for this request */
2185         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2186         if (res != 0)
2187                 goto out_unlock_free_unmap;
2188
2189         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2190         if (unlikely(res != 0))
2191                 goto out_unlock_free_unmap;
2192         pkt = (struct ctio7_to_24xx *)prm.pkt;
2193         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2194             CTIO7_FLAGS_STATUS_MODE_0);
2195         qlt_load_data_segments(&prm, vha);
2196
2197         cmd->state = QLA_TGT_STATE_NEED_DATA;
2198
2199         qla2x00_start_iocbs(vha, vha->req);
2200         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2201
2202         return res;
2203
2204 out_unlock_free_unmap:
2205         if (cmd->sg_mapped)
2206                 qlt_unmap_sg(vha, cmd);
2207         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2208
2209         return res;
2210 }
2211 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2212
2213 /* If hardware_lock held on entry, might drop it, then reaquire */
2214 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2215 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2216         struct qla_tgt_cmd *cmd,
2217         struct atio_from_isp *atio)
2218 {
2219         struct ctio7_to_24xx *ctio24;
2220         struct qla_hw_data *ha = vha->hw;
2221         request_t *pkt;
2222         int ret = 0;
2223
2224         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2225
2226         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2227         if (pkt == NULL) {
2228                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2229                     "qla_target(%d): %s failed: unable to allocate "
2230                     "request packet\n", vha->vp_idx, __func__);
2231                 return -ENOMEM;
2232         }
2233
2234         if (cmd != NULL) {
2235                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2236                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2237                             "qla_target(%d): Terminating cmd %p with "
2238                             "incorrect state %d\n", vha->vp_idx, cmd,
2239                             cmd->state);
2240                 } else
2241                         ret = 1;
2242         }
2243
2244         pkt->entry_count = 1;
2245         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2246
2247         ctio24 = (struct ctio7_to_24xx *)pkt;
2248         ctio24->entry_type = CTIO_TYPE7;
2249         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2250         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2251         ctio24->vp_index = vha->vp_idx;
2252         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2253         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2254         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2255         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2256         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2257             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2258                 CTIO7_FLAGS_TERMINATE);
2259         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2260
2261         /* Most likely, it isn't needed */
2262         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2263             &atio->u.isp24.fcp_cmnd.add_cdb[
2264             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2265         if (ctio24->u.status1.residual != 0)
2266                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2267
2268         qla2x00_start_iocbs(vha, vha->req);
2269         return ret;
2270 }
2271
2272 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2273         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2274 {
2275         unsigned long flags;
2276         int rc;
2277
2278         if (qlt_issue_marker(vha, ha_locked) < 0)
2279                 return;
2280
2281         if (ha_locked) {
2282                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2283                 goto done;
2284         }
2285         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2286         rc = __qlt_send_term_exchange(vha, cmd, atio);
2287         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2288 done:
2289         if (rc == 1) {
2290                 if (!ha_locked && !in_interrupt())
2291                         msleep(250); /* just in case */
2292
2293                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2294         }
2295 }
2296
2297 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2298 {
2299         BUG_ON(cmd->sg_mapped);
2300
2301         if (unlikely(cmd->free_sg))
2302                 kfree(cmd->sg);
2303         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2304 }
2305 EXPORT_SYMBOL(qlt_free_cmd);
2306
2307 /* ha->hardware_lock supposed to be held on entry */
2308 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2309         struct qla_tgt_cmd *cmd, void *ctio)
2310 {
2311         struct qla_tgt_srr_ctio *sc;
2312         struct qla_hw_data *ha = vha->hw;
2313         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2314         struct qla_tgt_srr_imm *imm;
2315
2316         tgt->ctio_srr_id++;
2317
2318         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2319             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2320
2321         if (!ctio) {
2322                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2323                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2324                     vha->vp_idx);
2325                 return -EINVAL;
2326         }
2327
2328         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2329         if (sc != NULL) {
2330                 sc->cmd = cmd;
2331                 /* IRQ is already OFF */
2332                 spin_lock(&tgt->srr_lock);
2333                 sc->srr_id = tgt->ctio_srr_id;
2334                 list_add_tail(&sc->srr_list_entry,
2335                     &tgt->srr_ctio_list);
2336                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2337                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2338                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2339                         int found = 0;
2340                         list_for_each_entry(imm, &tgt->srr_imm_list,
2341                             srr_list_entry) {
2342                                 if (imm->srr_id == sc->srr_id) {
2343                                         found = 1;
2344                                         break;
2345                                 }
2346                         }
2347                         if (found) {
2348                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2349                                     "Scheduling srr work\n");
2350                                 schedule_work(&tgt->srr_work);
2351                         } else {
2352                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2353                                     "qla_target(%d): imm_srr_id "
2354                                     "== ctio_srr_id (%d), but there is no "
2355                                     "corresponding SRR IMM, deleting CTIO "
2356                                     "SRR %p\n", vha->vp_idx,
2357                                     tgt->ctio_srr_id, sc);
2358                                 list_del(&sc->srr_list_entry);
2359                                 spin_unlock(&tgt->srr_lock);
2360
2361                                 kfree(sc);
2362                                 return -EINVAL;
2363                         }
2364                 }
2365                 spin_unlock(&tgt->srr_lock);
2366         } else {
2367                 struct qla_tgt_srr_imm *ti;
2368
2369                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2370                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2371                     vha->vp_idx);
2372                 spin_lock(&tgt->srr_lock);
2373                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2374                     srr_list_entry) {
2375                         if (imm->srr_id == tgt->ctio_srr_id) {
2376                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2377                                     "IMM SRR %p deleted (id %d)\n",
2378                                     imm, imm->srr_id);
2379                                 list_del(&imm->srr_list_entry);
2380                                 qlt_reject_free_srr_imm(vha, imm, 1);
2381                         }
2382                 }
2383                 spin_unlock(&tgt->srr_lock);
2384
2385                 return -ENOMEM;
2386         }
2387
2388         return 0;
2389 }
2390
2391 /*
2392  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2393  */
2394 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2395         struct qla_tgt_cmd *cmd, uint32_t status)
2396 {
2397         int term = 0;
2398
2399         if (ctio != NULL) {
2400                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2401                 term = !(c->flags &
2402                     __constant_cpu_to_le16(OF_TERM_EXCH));
2403         } else
2404                 term = 1;
2405
2406         if (term)
2407                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2408
2409         return term;
2410 }
2411
2412 /* ha->hardware_lock supposed to be held on entry */
2413 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2414         uint32_t handle)
2415 {
2416         struct qla_hw_data *ha = vha->hw;
2417
2418         handle--;
2419         if (ha->tgt.cmds[handle] != NULL) {
2420                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2421                 ha->tgt.cmds[handle] = NULL;
2422                 return cmd;
2423         } else
2424                 return NULL;
2425 }
2426
2427 /* ha->hardware_lock supposed to be held on entry */
2428 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2429         uint32_t handle, void *ctio)
2430 {
2431         struct qla_tgt_cmd *cmd = NULL;
2432
2433         /* Clear out internal marks */
2434         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2435             CTIO_INTERMEDIATE_HANDLE_MARK);
2436
2437         if (handle != QLA_TGT_NULL_HANDLE) {
2438                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2439                         ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2440                             "SKIP_HANDLE CTIO\n");
2441                         return NULL;
2442                 }
2443                 /* handle-1 is actually used */
2444                 if (unlikely(handle > MAX_OUTSTANDING_COMMANDS)) {
2445                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2446                             "qla_target(%d): Wrong handle %x received\n",
2447                             vha->vp_idx, handle);
2448                         return NULL;
2449                 }
2450                 cmd = qlt_get_cmd(vha, handle);
2451                 if (unlikely(cmd == NULL)) {
2452                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2453                             "qla_target(%d): Suspicious: unable to "
2454                             "find the command with handle %x\n", vha->vp_idx,
2455                             handle);
2456                         return NULL;
2457                 }
2458         } else if (ctio != NULL) {
2459                 /* We can't get loop ID from CTIO7 */
2460                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2461                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2462                     "support NULL handles\n", vha->vp_idx);
2463                 return NULL;
2464         }
2465
2466         return cmd;
2467 }
2468
2469 /*
2470  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2471  */
2472 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2473         uint32_t status, void *ctio)
2474 {
2475         struct qla_hw_data *ha = vha->hw;
2476         struct se_cmd *se_cmd;
2477         struct target_core_fabric_ops *tfo;
2478         struct qla_tgt_cmd *cmd;
2479
2480         ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2481             "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2482             vha->vp_idx, ctio, status, handle);
2483
2484         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2485                 /* That could happen only in case of an error/reset/abort */
2486                 if (status != CTIO_SUCCESS) {
2487                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2488                             "Intermediate CTIO received"
2489                             " (status %x)\n", status);
2490                 }
2491                 return;
2492         }
2493
2494         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2495         if (cmd == NULL)
2496                 return;
2497
2498         se_cmd = &cmd->se_cmd;
2499         tfo = se_cmd->se_tfo;
2500
2501         if (cmd->sg_mapped)
2502                 qlt_unmap_sg(vha, cmd);
2503
2504         if (unlikely(status != CTIO_SUCCESS)) {
2505                 switch (status & 0xFFFF) {
2506                 case CTIO_LIP_RESET:
2507                 case CTIO_TARGET_RESET:
2508                 case CTIO_ABORTED:
2509                 case CTIO_TIMEOUT:
2510                 case CTIO_INVALID_RX_ID:
2511                         /* They are OK */
2512                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2513                             "qla_target(%d): CTIO with "
2514                             "status %#x received, state %x, se_cmd %p, "
2515                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2516                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2517                             status, cmd->state, se_cmd);
2518                         break;
2519
2520                 case CTIO_PORT_LOGGED_OUT:
2521                 case CTIO_PORT_UNAVAILABLE:
2522                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2523                             "qla_target(%d): CTIO with PORT LOGGED "
2524                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
2525                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
2526                             status, cmd->state, se_cmd);
2527                         break;
2528
2529                 case CTIO_SRR_RECEIVED:
2530                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2531                             "qla_target(%d): CTIO with SRR_RECEIVED"
2532                             " status %x received (state %x, se_cmd %p)\n",
2533                             vha->vp_idx, status, cmd->state, se_cmd);
2534                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2535                                 break;
2536                         else
2537                                 return;
2538
2539                 default:
2540                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2541                             "qla_target(%d): CTIO with error status "
2542                             "0x%x received (state %x, se_cmd %p\n",
2543                             vha->vp_idx, status, cmd->state, se_cmd);
2544                         break;
2545                 }
2546
2547                 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2548                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2549                                 return;
2550         }
2551
2552         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2553                 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2554         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2555                 int rx_status = 0;
2556
2557                 cmd->state = QLA_TGT_STATE_DATA_IN;
2558
2559                 if (unlikely(status != CTIO_SUCCESS))
2560                         rx_status = -EIO;
2561                 else
2562                         cmd->write_data_transferred = 1;
2563
2564                 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2565                     "Data received, context %x, rx_status %d\n",
2566                     0x0, rx_status);
2567
2568                 ha->tgt.tgt_ops->handle_data(cmd);
2569                 return;
2570         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2571                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2572                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2573         } else {
2574                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2575                     "qla_target(%d): A command in state (%d) should "
2576                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2577         }
2578
2579         if (unlikely(status != CTIO_SUCCESS)) {
2580                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2581                 dump_stack();
2582         }
2583
2584         ha->tgt.tgt_ops->free_cmd(cmd);
2585 }
2586
2587 /* ha->hardware_lock supposed to be held on entry */
2588 /* called via callback from qla2xxx */
2589 void qlt_ctio_completion(struct scsi_qla_host *vha, uint32_t handle)
2590 {
2591         struct qla_hw_data *ha = vha->hw;
2592         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2593
2594         if (likely(tgt == NULL)) {
2595                 ql_dbg(ql_dbg_tgt, vha, 0xe021,
2596                     "CTIO, but target mode not enabled"
2597                     " (ha %d %p handle %#x)", vha->vp_idx, ha, handle);
2598                 return;
2599         }
2600
2601         tgt->irq_cmd_count++;
2602         qlt_do_ctio_completion(vha, handle, CTIO_SUCCESS, NULL);
2603         tgt->irq_cmd_count--;
2604 }
2605
2606 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2607         uint8_t task_codes)
2608 {
2609         int fcp_task_attr;
2610
2611         switch (task_codes) {
2612         case ATIO_SIMPLE_QUEUE:
2613                 fcp_task_attr = MSG_SIMPLE_TAG;
2614                 break;
2615         case ATIO_HEAD_OF_QUEUE:
2616                 fcp_task_attr = MSG_HEAD_TAG;
2617                 break;
2618         case ATIO_ORDERED_QUEUE:
2619                 fcp_task_attr = MSG_ORDERED_TAG;
2620                 break;
2621         case ATIO_ACA_QUEUE:
2622                 fcp_task_attr = MSG_ACA_TAG;
2623                 break;
2624         case ATIO_UNTAGGED:
2625                 fcp_task_attr = MSG_SIMPLE_TAG;
2626                 break;
2627         default:
2628                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2629                     "qla_target: unknown task code %x, use ORDERED instead\n",
2630                     task_codes);
2631                 fcp_task_attr = MSG_ORDERED_TAG;
2632                 break;
2633         }
2634
2635         return fcp_task_attr;
2636 }
2637
2638 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2639                                         uint8_t *);
2640 /*
2641  * Process context for I/O path into tcm_qla2xxx code
2642  */
2643 static void qlt_do_work(struct work_struct *work)
2644 {
2645         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2646         scsi_qla_host_t *vha = cmd->vha;
2647         struct qla_hw_data *ha = vha->hw;
2648         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2649         struct qla_tgt_sess *sess = NULL;
2650         struct atio_from_isp *atio = &cmd->atio;
2651         unsigned char *cdb;
2652         unsigned long flags;
2653         uint32_t data_length;
2654         int ret, fcp_task_attr, data_dir, bidi = 0;
2655
2656         if (tgt->tgt_stop)
2657                 goto out_term;
2658
2659         spin_lock_irqsave(&ha->hardware_lock, flags);
2660         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2661             atio->u.isp24.fcp_hdr.s_id);
2662         /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2663         if (sess)
2664                 kref_get(&sess->se_sess->sess_kref);
2665         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2666
2667         if (unlikely(!sess)) {
2668                 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2669
2670                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2671                         "qla_target(%d): Unable to find wwn login"
2672                         " (s_id %x:%x:%x), trying to create it manually\n",
2673                         vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2674
2675                 if (atio->u.raw.entry_count > 1) {
2676                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2677                                 "Dropping multy entry cmd %p\n", cmd);
2678                         goto out_term;
2679                 }
2680
2681                 mutex_lock(&ha->tgt.tgt_mutex);
2682                 sess = qlt_make_local_sess(vha, s_id);
2683                 /* sess has an extra creation ref. */
2684                 mutex_unlock(&ha->tgt.tgt_mutex);
2685
2686                 if (!sess)
2687                         goto out_term;
2688         }
2689
2690         cmd->sess = sess;
2691         cmd->loop_id = sess->loop_id;
2692         cmd->conf_compl_supported = sess->conf_compl_supported;
2693
2694         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2695         cmd->tag = atio->u.isp24.exchange_addr;
2696         cmd->unpacked_lun = scsilun_to_int(
2697             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2698
2699         if (atio->u.isp24.fcp_cmnd.rddata &&
2700             atio->u.isp24.fcp_cmnd.wrdata) {
2701                 bidi = 1;
2702                 data_dir = DMA_TO_DEVICE;
2703         } else if (atio->u.isp24.fcp_cmnd.rddata)
2704                 data_dir = DMA_FROM_DEVICE;
2705         else if (atio->u.isp24.fcp_cmnd.wrdata)
2706                 data_dir = DMA_TO_DEVICE;
2707         else
2708                 data_dir = DMA_NONE;
2709
2710         fcp_task_attr = qlt_get_fcp_task_attr(vha,
2711             atio->u.isp24.fcp_cmnd.task_attr);
2712         data_length = be32_to_cpu(get_unaligned((uint32_t *)
2713             &atio->u.isp24.fcp_cmnd.add_cdb[
2714             atio->u.isp24.fcp_cmnd.add_cdb_len]));
2715
2716         ql_dbg(ql_dbg_tgt, vha, 0xe022,
2717             "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2718             cmd, cmd->unpacked_lun, cmd->tag);
2719
2720         ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2721             fcp_task_attr, data_dir, bidi);
2722         if (ret != 0)
2723                 goto out_term;
2724         /*
2725          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2726          */
2727         ha->tgt.tgt_ops->put_sess(sess);
2728         return;
2729
2730 out_term:
2731         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2732         /*
2733          * cmd has not sent to target yet, so pass NULL as the second
2734          * argument to qlt_send_term_exchange() and free the memory here.
2735          */
2736         spin_lock_irqsave(&ha->hardware_lock, flags);
2737         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
2738         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2739         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2740         if (sess)
2741                 ha->tgt.tgt_ops->put_sess(sess);
2742 }
2743
2744 /* ha->hardware_lock supposed to be held on entry */
2745 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2746         struct atio_from_isp *atio)
2747 {
2748         struct qla_hw_data *ha = vha->hw;
2749         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2750         struct qla_tgt_cmd *cmd;
2751
2752         if (unlikely(tgt->tgt_stop)) {
2753                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2754                     "New command while device %p is shutting down\n", tgt);
2755                 return -EFAULT;
2756         }
2757
2758         cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2759         if (!cmd) {
2760                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2761                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2762                 return -ENOMEM;
2763         }
2764
2765         INIT_LIST_HEAD(&cmd->cmd_list);
2766
2767         memcpy(&cmd->atio, atio, sizeof(*atio));
2768         cmd->state = QLA_TGT_STATE_NEW;
2769         cmd->tgt = ha->tgt.qla_tgt;
2770         cmd->vha = vha;
2771
2772         INIT_WORK(&cmd->work, qlt_do_work);
2773         queue_work(qla_tgt_wq, &cmd->work);
2774         return 0;
2775
2776 }
2777
2778 /* ha->hardware_lock supposed to be held on entry */
2779 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2780         int fn, void *iocb, int flags)
2781 {
2782         struct scsi_qla_host *vha = sess->vha;
2783         struct qla_hw_data *ha = vha->hw;
2784         struct qla_tgt_mgmt_cmd *mcmd;
2785         int res;
2786         uint8_t tmr_func;
2787
2788         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2789         if (!mcmd) {
2790                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2791                     "qla_target(%d): Allocation of management "
2792                     "command failed, some commands and their data could "
2793                     "leak\n", vha->vp_idx);
2794                 return -ENOMEM;
2795         }
2796         memset(mcmd, 0, sizeof(*mcmd));
2797         mcmd->sess = sess;
2798
2799         if (iocb) {
2800                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2801                     sizeof(mcmd->orig_iocb.imm_ntfy));
2802         }
2803         mcmd->tmr_func = fn;
2804         mcmd->flags = flags;
2805
2806         switch (fn) {
2807         case QLA_TGT_CLEAR_ACA:
2808                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2809                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2810                 tmr_func = TMR_CLEAR_ACA;
2811                 break;
2812
2813         case QLA_TGT_TARGET_RESET:
2814                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2815                     "qla_target(%d): TARGET_RESET received\n",
2816                     sess->vha->vp_idx);
2817                 tmr_func = TMR_TARGET_WARM_RESET;
2818                 break;
2819
2820         case QLA_TGT_LUN_RESET:
2821                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2822                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2823                 tmr_func = TMR_LUN_RESET;
2824                 break;
2825
2826         case QLA_TGT_CLEAR_TS:
2827                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2828                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2829                 tmr_func = TMR_CLEAR_TASK_SET;
2830                 break;
2831
2832         case QLA_TGT_ABORT_TS:
2833                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2834                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2835                 tmr_func = TMR_ABORT_TASK_SET;
2836                 break;
2837 #if 0
2838         case QLA_TGT_ABORT_ALL:
2839                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2840                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2841                     sess->vha->vp_idx);
2842                 tmr_func = 0;
2843                 break;
2844
2845         case QLA_TGT_ABORT_ALL_SESS:
2846                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2847                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2848                     sess->vha->vp_idx);
2849                 tmr_func = 0;
2850                 break;
2851
2852         case QLA_TGT_NEXUS_LOSS_SESS:
2853                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2854                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2855                     sess->vha->vp_idx);
2856                 tmr_func = 0;
2857                 break;
2858
2859         case QLA_TGT_NEXUS_LOSS:
2860                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2861                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2862                 tmr_func = 0;
2863                 break;
2864 #endif
2865         default:
2866                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2867                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2868                     sess->vha->vp_idx, fn);
2869                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2870                 return -ENOSYS;
2871         }
2872
2873         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2874         if (res != 0) {
2875                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2876                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2877                     sess->vha->vp_idx, res);
2878                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2879                 return -EFAULT;
2880         }
2881
2882         return 0;
2883 }
2884
2885 /* ha->hardware_lock supposed to be held on entry */
2886 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2887 {
2888         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2889         struct qla_hw_data *ha = vha->hw;
2890         struct qla_tgt *tgt;
2891         struct qla_tgt_sess *sess;
2892         uint32_t lun, unpacked_lun;
2893         int lun_size, fn;
2894
2895         tgt = ha->tgt.qla_tgt;
2896
2897         lun = a->u.isp24.fcp_cmnd.lun;
2898         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2899         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2900         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2901             a->u.isp24.fcp_hdr.s_id);
2902         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2903
2904         if (!sess) {
2905                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2906                     "qla_target(%d): task mgmt fn 0x%x for "
2907                     "non-existant session\n", vha->vp_idx, fn);
2908                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2909                     sizeof(struct atio_from_isp));
2910         }
2911
2912         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2913 }
2914
2915 /* ha->hardware_lock supposed to be held on entry */
2916 static int __qlt_abort_task(struct scsi_qla_host *vha,
2917         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2918 {
2919         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2920         struct qla_hw_data *ha = vha->hw;
2921         struct qla_tgt_mgmt_cmd *mcmd;
2922         uint32_t lun, unpacked_lun;
2923         int rc;
2924
2925         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2926         if (mcmd == NULL) {
2927                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2928                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2929                     vha->vp_idx, __func__);
2930                 return -ENOMEM;
2931         }
2932         memset(mcmd, 0, sizeof(*mcmd));
2933
2934         mcmd->sess = sess;
2935         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2936             sizeof(mcmd->orig_iocb.imm_ntfy));
2937
2938         lun = a->u.isp24.fcp_cmnd.lun;
2939         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2940
2941         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2942             le16_to_cpu(iocb->u.isp2x.seq_id));
2943         if (rc != 0) {
2944                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2945                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2946                     vha->vp_idx, rc);
2947                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2948                 return -EFAULT;
2949         }
2950
2951         return 0;
2952 }
2953
2954 /* ha->hardware_lock supposed to be held on entry */
2955 static int qlt_abort_task(struct scsi_qla_host *vha,
2956         struct imm_ntfy_from_isp *iocb)
2957 {
2958         struct qla_hw_data *ha = vha->hw;
2959         struct qla_tgt_sess *sess;
2960         int loop_id;
2961
2962         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2963
2964         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2965         if (sess == NULL) {
2966                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2967                     "qla_target(%d): task abort for unexisting "
2968                     "session\n", vha->vp_idx);
2969                 return qlt_sched_sess_work(ha->tgt.qla_tgt,
2970                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2971         }
2972
2973         return __qlt_abort_task(vha, iocb, sess);
2974 }
2975
2976 /*
2977  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2978  */
2979 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2980         struct imm_ntfy_from_isp *iocb)
2981 {
2982         struct qla_hw_data *ha = vha->hw;
2983         int res = 0;
2984
2985         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2986             "qla_target(%d): Port ID: 0x%02x:%02x:%02x"
2987             " ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id[0],
2988             iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[2],
2989             iocb->u.isp24.status_subcode);
2990
2991         switch (iocb->u.isp24.status_subcode) {
2992         case ELS_PLOGI:
2993         case ELS_FLOGI:
2994         case ELS_PRLI:
2995         case ELS_LOGO:
2996         case ELS_PRLO:
2997                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2998                 break;
2999         case ELS_PDISC:
3000         case ELS_ADISC:
3001         {
3002                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3003                 if (tgt->link_reinit_iocb_pending) {
3004                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3005                             0, 0, 0, 0, 0, 0);
3006                         tgt->link_reinit_iocb_pending = 0;
3007                 }
3008                 res = 1; /* send notify ack */
3009                 break;
3010         }
3011
3012         default:
3013                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3014                     "qla_target(%d): Unsupported ELS command %x "
3015                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3016                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3017                 break;
3018         }
3019
3020         return res;
3021 }
3022
3023 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3024 {
3025         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3026         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3027         int i, sg_srr_cnt, bufflen = 0;
3028
3029         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3030             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3031             "cmd->sg_cnt: %u, direction: %d\n",
3032             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3033
3034         /*
3035          * FIXME: Reject non zero SRR relative offset until we can test
3036          * this code properly.
3037          */
3038         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3039         return -1;
3040
3041         if (!cmd->sg || !cmd->sg_cnt) {
3042                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3043                     "Missing cmd->sg or zero cmd->sg_cnt in"
3044                     " qla_tgt_set_data_offset\n");
3045                 return -EINVAL;
3046         }
3047         /*
3048          * Walk the current cmd->sg list until we locate the new sg_srr_start
3049          */
3050         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3051                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3052                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3053                     i, sg, sg_page(sg), sg->length, sg->offset);
3054
3055                 if ((sg->length + tmp) > offset) {
3056                         first_offset = rem_offset;
3057                         sg_srr_start = sg;
3058                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3059                             "Found matching sg[%d], using %p as sg_srr_start, "
3060                             "and using first_offset: %zu\n", i, sg,
3061                             first_offset);
3062                         break;
3063                 }
3064                 tmp += sg->length;
3065                 rem_offset -= sg->length;
3066         }
3067
3068         if (!sg_srr_start) {
3069                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3070                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3071                 return -EINVAL;
3072         }
3073         sg_srr_cnt = (cmd->sg_cnt - i);
3074
3075         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3076         if (!sg_srr) {
3077                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3078                     "Unable to allocate sgp\n");
3079                 return -ENOMEM;
3080         }
3081         sg_init_table(sg_srr, sg_srr_cnt);
3082         sgp = &sg_srr[0];
3083         /*
3084          * Walk the remaining list for sg_srr_start, mapping to the newly
3085          * allocated sg_srr taking first_offset into account.
3086          */
3087         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3088                 if (first_offset) {
3089                         sg_set_page(sgp, sg_page(sg),
3090                             (sg->length - first_offset), first_offset);
3091                         first_offset = 0;
3092                 } else {
3093                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3094                 }
3095                 bufflen += sgp->length;
3096
3097                 sgp = sg_next(sgp);
3098                 if (!sgp)
3099                         break;
3100         }
3101
3102         cmd->sg = sg_srr;
3103         cmd->sg_cnt = sg_srr_cnt;
3104         cmd->bufflen = bufflen;
3105         cmd->offset += offset;
3106         cmd->free_sg = 1;
3107
3108         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3109         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3110             cmd->sg_cnt);
3111         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3112             cmd->bufflen);
3113         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3114             cmd->offset);
3115
3116         if (cmd->sg_cnt < 0)
3117                 BUG();
3118
3119         if (cmd->bufflen < 0)
3120                 BUG();
3121
3122         return 0;
3123 }
3124
3125 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3126         uint32_t srr_rel_offs, int *xmit_type)
3127 {
3128         int res = 0, rel_offs;
3129
3130         rel_offs = srr_rel_offs - cmd->offset;
3131         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3132             srr_rel_offs, rel_offs);
3133
3134         *xmit_type = QLA_TGT_XMIT_ALL;
3135
3136         if (rel_offs < 0) {
3137                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3138                     "qla_target(%d): SRR rel_offs (%d) < 0",
3139                     cmd->vha->vp_idx, rel_offs);
3140                 res = -1;
3141         } else if (rel_offs == cmd->bufflen)
3142                 *xmit_type = QLA_TGT_XMIT_STATUS;
3143         else if (rel_offs > 0)
3144                 res = qlt_set_data_offset(cmd, rel_offs);
3145
3146         return res;
3147 }
3148
3149 /* No locks, thread context */
3150 static void qlt_handle_srr(struct scsi_qla_host *vha,
3151         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3152 {
3153         struct imm_ntfy_from_isp *ntfy =
3154             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3155         struct qla_hw_data *ha = vha->hw;
3156         struct qla_tgt_cmd *cmd = sctio->cmd;
3157         struct se_cmd *se_cmd = &cmd->se_cmd;
3158         unsigned long flags;
3159         int xmit_type = 0, resp = 0;
3160         uint32_t offset;
3161         uint16_t srr_ui;
3162
3163         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3164         srr_ui = ntfy->u.isp24.srr_ui;
3165
3166         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3167             cmd, srr_ui);
3168
3169         switch (srr_ui) {
3170         case SRR_IU_STATUS:
3171                 spin_lock_irqsave(&ha->hardware_lock, flags);
3172                 qlt_send_notify_ack(vha, ntfy,
3173                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3174                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3175                 xmit_type = QLA_TGT_XMIT_STATUS;
3176                 resp = 1;
3177                 break;
3178         case SRR_IU_DATA_IN:
3179                 if (!cmd->sg || !cmd->sg_cnt) {
3180                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3181                             "Unable to process SRR_IU_DATA_IN due to"
3182                             " missing cmd->sg, state: %d\n", cmd->state);
3183                         dump_stack();
3184                         goto out_reject;
3185                 }
3186                 if (se_cmd->scsi_status != 0) {
3187                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3188                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3189                             "scsi_status\n");
3190                         goto out_reject;
3191                 }
3192                 cmd->bufflen = se_cmd->data_length;
3193
3194                 if (qlt_has_data(cmd)) {
3195                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3196                                 goto out_reject;
3197                         spin_lock_irqsave(&ha->hardware_lock, flags);
3198                         qlt_send_notify_ack(vha, ntfy,
3199                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3200                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3201                         resp = 1;
3202                 } else {
3203                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3204                             "qla_target(%d): SRR for in data for cmd "
3205                             "without them (tag %d, SCSI status %d), "
3206                             "reject", vha->vp_idx, cmd->tag,
3207                             cmd->se_cmd.scsi_status);
3208                         goto out_reject;
3209                 }
3210                 break;
3211         case SRR_IU_DATA_OUT:
3212                 if (!cmd->sg || !cmd->sg_cnt) {
3213                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3214                             "Unable to process SRR_IU_DATA_OUT due to"
3215                             " missing cmd->sg\n");
3216                         dump_stack();
3217                         goto out_reject;
3218                 }
3219                 if (se_cmd->scsi_status != 0) {
3220                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3221                             "Rejecting SRR_IU_DATA_OUT"
3222                             " with non GOOD scsi_status\n");
3223                         goto out_reject;
3224                 }
3225                 cmd->bufflen = se_cmd->data_length;
3226
3227                 if (qlt_has_data(cmd)) {
3228                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3229                                 goto out_reject;
3230                         spin_lock_irqsave(&ha->hardware_lock, flags);
3231                         qlt_send_notify_ack(vha, ntfy,
3232                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3233                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3234                         if (xmit_type & QLA_TGT_XMIT_DATA)
3235                                 qlt_rdy_to_xfer(cmd);
3236                 } else {
3237                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3238                             "qla_target(%d): SRR for out data for cmd "
3239                             "without them (tag %d, SCSI status %d), "
3240                             "reject", vha->vp_idx, cmd->tag,
3241                             cmd->se_cmd.scsi_status);
3242                         goto out_reject;
3243                 }
3244                 break;
3245         default:
3246                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3247                     "qla_target(%d): Unknown srr_ui value %x",
3248                     vha->vp_idx, srr_ui);
3249                 goto out_reject;
3250         }
3251
3252         /* Transmit response in case of status and data-in cases */
3253         if (resp)
3254                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3255
3256         return;
3257
3258 out_reject:
3259         spin_lock_irqsave(&ha->hardware_lock, flags);
3260         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3261             NOTIFY_ACK_SRR_FLAGS_REJECT,
3262             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3263             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3264         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3265                 cmd->state = QLA_TGT_STATE_DATA_IN;
3266                 dump_stack();
3267         } else
3268                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3269         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3270 }
3271
3272 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3273         struct qla_tgt_srr_imm *imm, int ha_locked)
3274 {
3275         struct qla_hw_data *ha = vha->hw;
3276         unsigned long flags = 0;
3277
3278         if (!ha_locked)
3279                 spin_lock_irqsave(&ha->hardware_lock, flags);
3280
3281         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3282             NOTIFY_ACK_SRR_FLAGS_REJECT,
3283             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3284             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3285
3286         if (!ha_locked)
3287                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3288
3289         kfree(imm);
3290 }
3291
3292 static void qlt_handle_srr_work(struct work_struct *work)
3293 {
3294         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3295         struct scsi_qla_host *vha = tgt->vha;
3296         struct qla_tgt_srr_ctio *sctio;
3297         unsigned long flags;
3298
3299         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3300             tgt);
3301
3302 restart:
3303         spin_lock_irqsave(&tgt->srr_lock, flags);
3304         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3305                 struct qla_tgt_srr_imm *imm, *i, *ti;
3306                 struct qla_tgt_cmd *cmd;
3307                 struct se_cmd *se_cmd;
3308
3309                 imm = NULL;
3310                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3311                                                 srr_list_entry) {
3312                         if (i->srr_id == sctio->srr_id) {
3313                                 list_del(&i->srr_list_entry);
3314                                 if (imm) {
3315                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3316                                           "qla_target(%d): There must be "
3317                                           "only one IMM SRR per CTIO SRR "
3318                                           "(IMM SRR %p, id %d, CTIO %p\n",
3319                                           vha->vp_idx, i, i->srr_id, sctio);
3320                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
3321                                 } else
3322                                         imm = i;
3323                         }
3324                 }
3325
3326                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3327                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3328                     sctio->srr_id);
3329
3330                 if (imm == NULL) {
3331                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3332                             "Not found matching IMM for SRR CTIO (id %d)\n",
3333                             sctio->srr_id);
3334                         continue;
3335                 } else
3336                         list_del(&sctio->srr_list_entry);
3337
3338                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3339
3340                 cmd = sctio->cmd;
3341                 /*
3342                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3343                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3344                  * logic..
3345                  */
3346                 cmd->offset = 0;
3347                 if (cmd->free_sg) {
3348                         kfree(cmd->sg);
3349                         cmd->sg = NULL;
3350                         cmd->free_sg = 0;
3351                 }
3352                 se_cmd = &cmd->se_cmd;
3353
3354                 cmd->sg_cnt = se_cmd->t_data_nents;
3355                 cmd->sg = se_cmd->t_data_sg;
3356
3357                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3358                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3359                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3360                     se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
3361
3362                 qlt_handle_srr(vha, sctio, imm);
3363
3364                 kfree(imm);
3365                 kfree(sctio);
3366                 goto restart;
3367         }
3368         spin_unlock_irqrestore(&tgt->srr_lock, flags);
3369 }
3370
3371 /* ha->hardware_lock supposed to be held on entry */
3372 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3373         struct imm_ntfy_from_isp *iocb)
3374 {
3375         struct qla_tgt_srr_imm *imm;
3376         struct qla_hw_data *ha = vha->hw;
3377         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3378         struct qla_tgt_srr_ctio *sctio;
3379
3380         tgt->imm_srr_id++;
3381
3382         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3383             vha->vp_idx);
3384
3385         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3386         if (imm != NULL) {
3387                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3388
3389                 /* IRQ is already OFF */
3390                 spin_lock(&tgt->srr_lock);
3391                 imm->srr_id = tgt->imm_srr_id;
3392                 list_add_tail(&imm->srr_list_entry,
3393                     &tgt->srr_imm_list);
3394                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3395                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
3396                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
3397                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3398                         int found = 0;
3399                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
3400                             srr_list_entry) {
3401                                 if (sctio->srr_id == imm->srr_id) {
3402                                         found = 1;
3403                                         break;
3404                                 }
3405                         }
3406                         if (found) {
3407                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3408                                     "Scheduling srr work\n");
3409                                 schedule_work(&tgt->srr_work);
3410                         } else {
3411                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3412                                     "qla_target(%d): imm_srr_id "
3413                                     "== ctio_srr_id (%d), but there is no "
3414                                     "corresponding SRR CTIO, deleting IMM "
3415                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3416                                     imm);
3417                                 list_del(&imm->srr_list_entry);
3418
3419                                 kfree(imm);
3420
3421                                 spin_unlock(&tgt->srr_lock);
3422                                 goto out_reject;
3423                         }
3424                 }
3425                 spin_unlock(&tgt->srr_lock);
3426         } else {
3427                 struct qla_tgt_srr_ctio *ts;
3428
3429                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3430                     "qla_target(%d): Unable to allocate SRR IMM "
3431                     "entry, SRR request will be rejected\n", vha->vp_idx);
3432
3433                 /* IRQ is already OFF */
3434                 spin_lock(&tgt->srr_lock);
3435                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3436                     srr_list_entry) {
3437                         if (sctio->srr_id == tgt->imm_srr_id) {
3438                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3439                                     "CTIO SRR %p deleted (id %d)\n",
3440                                     sctio, sctio->srr_id);
3441                                 list_del(&sctio->srr_list_entry);
3442                                 qlt_send_term_exchange(vha, sctio->cmd,
3443                                     &sctio->cmd->atio, 1);
3444                                 kfree(sctio);
3445                         }
3446                 }
3447                 spin_unlock(&tgt->srr_lock);
3448                 goto out_reject;
3449         }
3450
3451         return;
3452
3453 out_reject:
3454         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3455             NOTIFY_ACK_SRR_FLAGS_REJECT,
3456             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3457             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3458 }
3459
3460 /*
3461  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3462  */
3463 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3464         struct imm_ntfy_from_isp *iocb)
3465 {
3466         struct qla_hw_data *ha = vha->hw;
3467         uint32_t add_flags = 0;
3468         int send_notify_ack = 1;
3469         uint16_t status;
3470
3471         status = le16_to_cpu(iocb->u.isp2x.status);
3472         switch (status) {
3473         case IMM_NTFY_LIP_RESET:
3474         {
3475                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3476                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3477                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3478                     iocb->u.isp24.status_subcode);
3479
3480                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3481                         send_notify_ack = 0;
3482                 break;
3483         }
3484
3485         case IMM_NTFY_LIP_LINK_REINIT:
3486         {
3487                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3488                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3489                     "qla_target(%d): LINK REINIT (loop %#x, "
3490                     "subcode %x)\n", vha->vp_idx,
3491                     le16_to_cpu(iocb->u.isp24.nport_handle),
3492                     iocb->u.isp24.status_subcode);
3493                 if (tgt->link_reinit_iocb_pending) {
3494                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3495                             0, 0, 0, 0, 0, 0);
3496                 }
3497                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3498                 tgt->link_reinit_iocb_pending = 1;
3499                 /*
3500                  * QLogic requires to wait after LINK REINIT for possible
3501                  * PDISC or ADISC ELS commands
3502                  */
3503                 send_notify_ack = 0;
3504                 break;
3505         }
3506
3507         case IMM_NTFY_PORT_LOGOUT:
3508                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3509                     "qla_target(%d): Port logout (loop "
3510                     "%#x, subcode %x)\n", vha->vp_idx,
3511                     le16_to_cpu(iocb->u.isp24.nport_handle),
3512                     iocb->u.isp24.status_subcode);
3513
3514                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3515                         send_notify_ack = 0;
3516                 /* The sessions will be cleared in the callback, if needed */
3517                 break;
3518
3519         case IMM_NTFY_GLBL_TPRLO:
3520                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3521                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3522                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3523                         send_notify_ack = 0;
3524                 /* The sessions will be cleared in the callback, if needed */
3525                 break;
3526
3527         case IMM_NTFY_PORT_CONFIG:
3528                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3529                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3530                     status);
3531                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3532                         send_notify_ack = 0;
3533                 /* The sessions will be cleared in the callback, if needed */
3534                 break;
3535
3536         case IMM_NTFY_GLBL_LOGO:
3537                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3538                     "qla_target(%d): Link failure detected\n",
3539                     vha->vp_idx);
3540                 /* I_T nexus loss */
3541                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3542                         send_notify_ack = 0;
3543                 break;
3544
3545         case IMM_NTFY_IOCB_OVERFLOW:
3546                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3547                     "qla_target(%d): Cannot provide requested "
3548                     "capability (IOCB overflowed the immediate notify "
3549                     "resource count)\n", vha->vp_idx);
3550                 break;
3551
3552         case IMM_NTFY_ABORT_TASK:
3553                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3554                     "qla_target(%d): Abort Task (S %08x I %#x -> "
3555                     "L %#x)\n", vha->vp_idx,
3556                     le16_to_cpu(iocb->u.isp2x.seq_id),
3557                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3558                     le16_to_cpu(iocb->u.isp2x.lun));
3559                 if (qlt_abort_task(vha, iocb) == 0)
3560                         send_notify_ack = 0;
3561                 break;
3562
3563         case IMM_NTFY_RESOURCE:
3564                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3565                     "qla_target(%d): Out of resources, host %ld\n",
3566                     vha->vp_idx, vha->host_no);
3567                 break;
3568
3569         case IMM_NTFY_MSG_RX:
3570                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3571                     "qla_target(%d): Immediate notify task %x\n",
3572                     vha->vp_idx, iocb->u.isp2x.task_flags);
3573                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3574                         send_notify_ack = 0;
3575                 break;
3576
3577         case IMM_NTFY_ELS:
3578                 if (qlt_24xx_handle_els(vha, iocb) == 0)
3579                         send_notify_ack = 0;
3580                 break;
3581
3582         case IMM_NTFY_SRR:
3583                 qlt_prepare_srr_imm(vha, iocb);
3584                 send_notify_ack = 0;
3585                 break;
3586
3587         default:
3588                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3589                     "qla_target(%d): Received unknown immediate "
3590                     "notify status %x\n", vha->vp_idx, status);
3591                 break;
3592         }
3593
3594         if (send_notify_ack)
3595                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3596 }
3597
3598 /*
3599  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3600  * This function sends busy to ISP 2xxx or 24xx.
3601  */
3602 static void qlt_send_busy(struct scsi_qla_host *vha,
3603         struct atio_from_isp *atio, uint16_t status)
3604 {
3605         struct ctio7_to_24xx *ctio24;
3606         struct qla_hw_data *ha = vha->hw;
3607         request_t *pkt;
3608         struct qla_tgt_sess *sess = NULL;
3609
3610         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3611             atio->u.isp24.fcp_hdr.s_id);
3612         if (!sess) {
3613                 qlt_send_term_exchange(vha, NULL, atio, 1);
3614                 return;
3615         }
3616         /* Sending marker isn't necessary, since we called from ISR */
3617
3618         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3619         if (!pkt) {
3620                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3621                     "qla_target(%d): %s failed: unable to allocate "
3622                     "request packet", vha->vp_idx, __func__);
3623                 return;
3624         }
3625
3626         pkt->entry_count = 1;
3627         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3628
3629         ctio24 = (struct ctio7_to_24xx *)pkt;
3630         ctio24->entry_type = CTIO_TYPE7;
3631         ctio24->nport_handle = sess->loop_id;
3632         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3633         ctio24->vp_index = vha->vp_idx;
3634         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3635         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3636         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3637         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3638         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3639             __constant_cpu_to_le16(
3640                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3641                 CTIO7_FLAGS_DONT_RET_CTIO);
3642         /*
3643          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3644          * if the explicit conformation is used.
3645          */
3646         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3647         ctio24->u.status1.scsi_status = cpu_to_le16(status);
3648         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3649             &atio->u.isp24.fcp_cmnd.add_cdb[
3650             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3651         if (ctio24->u.status1.residual != 0)
3652                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3653
3654         qla2x00_start_iocbs(vha, vha->req);
3655 }
3656
3657 /* ha->hardware_lock supposed to be held on entry */
3658 /* called via callback from qla2xxx */
3659 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3660         struct atio_from_isp *atio)
3661 {
3662         struct qla_hw_data *ha = vha->hw;
3663         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3664         int rc;
3665
3666         if (unlikely(tgt == NULL)) {
3667                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3668                     "ATIO pkt, but no tgt (ha %p)", ha);
3669                 return;
3670         }
3671         ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3672             "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3673             vha->vp_idx, atio, atio->u.raw.entry_type,
3674             atio->u.raw.entry_count);
3675         /*
3676          * In tgt_stop mode we also should allow all requests to pass.
3677          * Otherwise, some commands can stuck.
3678          */
3679
3680         tgt->irq_cmd_count++;
3681
3682         switch (atio->u.raw.entry_type) {
3683         case ATIO_TYPE7:
3684                 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3685                     "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3686                     "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3687                     vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3688                     atio->u.isp24.fcp_cmnd.rddata,
3689                     atio->u.isp24.fcp_cmnd.wrdata,
3690                     atio->u.isp24.fcp_cmnd.add_cdb_len,
3691                     be32_to_cpu(get_unaligned((uint32_t *)
3692                         &atio->u.isp24.fcp_cmnd.add_cdb[
3693                         atio->u.isp24.fcp_cmnd.add_cdb_len])),
3694                     atio->u.isp24.fcp_hdr.s_id[0],
3695                     atio->u.isp24.fcp_hdr.s_id[1],
3696                     atio->u.isp24.fcp_hdr.s_id[2]);
3697
3698                 if (unlikely(atio->u.isp24.exchange_addr ==
3699                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3700                         ql_dbg(ql_dbg_tgt, vha, 0xe058,
3701                             "qla_target(%d): ATIO_TYPE7 "
3702                             "received with UNKNOWN exchange address, "
3703                             "sending QUEUE_FULL\n", vha->vp_idx);
3704                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3705                         break;
3706                 }
3707                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3708                         rc = qlt_handle_cmd_for_atio(vha, atio);
3709                 else
3710                         rc = qlt_handle_task_mgmt(vha, atio);
3711                 if (unlikely(rc != 0)) {
3712                         if (rc == -ESRCH) {
3713 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3714                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3715 #else
3716                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3717 #endif
3718                         } else {
3719                                 if (tgt->tgt_stop) {
3720                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
3721                                             "qla_target: Unable to send "
3722                                             "command to target for req, "
3723                                             "ignoring.\n");
3724                                 } else {
3725                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3726                                             "qla_target(%d): Unable to send "
3727                                             "command to target, sending BUSY "
3728                                             "status.\n", vha->vp_idx);
3729                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3730                                 }
3731                         }
3732                 }
3733                 break;
3734
3735         case IMMED_NOTIFY_TYPE:
3736         {
3737                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3738                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3739                             "qla_target(%d): Received ATIO packet %x "
3740                             "with error status %x\n", vha->vp_idx,
3741                             atio->u.raw.entry_type,
3742                             atio->u.isp2x.entry_status);
3743                         break;
3744                 }
3745                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3746                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3747                 break;
3748         }
3749
3750         default:
3751                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3752                     "qla_target(%d): Received unknown ATIO atio "
3753                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3754                 break;
3755         }
3756
3757         tgt->irq_cmd_count--;
3758 }
3759
3760 /* ha->hardware_lock supposed to be held on entry */
3761 /* called via callback from qla2xxx */
3762 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3763 {
3764         struct qla_hw_data *ha = vha->hw;
3765         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3766
3767         if (unlikely(tgt == NULL)) {
3768                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3769                     "qla_target(%d): Response pkt %x received, but no "
3770                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3771                 return;
3772         }
3773
3774         ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3775             "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3776             "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3777             pkt->entry_count, pkt->entry_status, pkt->handle);
3778
3779         /*
3780          * In tgt_stop mode we also should allow all requests to pass.
3781          * Otherwise, some commands can stuck.
3782          */
3783
3784         tgt->irq_cmd_count++;
3785
3786         switch (pkt->entry_type) {
3787         case CTIO_TYPE7:
3788         {
3789                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3790                 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3791                     vha->vp_idx);
3792                 qlt_do_ctio_completion(vha, entry->handle,
3793                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3794                     entry);
3795                 break;
3796         }
3797
3798         case ACCEPT_TGT_IO_TYPE:
3799         {
3800                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3801                 int rc;
3802                 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3803                     "ACCEPT_TGT_IO instance %d status %04x "
3804                     "lun %04x read/write %d data_length %04x "
3805                     "target_id %02x rx_id %04x\n ", vha->vp_idx,
3806                     le16_to_cpu(atio->u.isp2x.status),
3807                     le16_to_cpu(atio->u.isp2x.lun),
3808                     atio->u.isp2x.execution_codes,
3809                     le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3810                     atio), atio->u.isp2x.rx_id);
3811                 if (atio->u.isp2x.status !=
3812                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3813                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3814                             "qla_target(%d): ATIO with error "
3815                             "status %x received\n", vha->vp_idx,
3816                             le16_to_cpu(atio->u.isp2x.status));
3817                         break;
3818                 }
3819                 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3820                     "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3821                     atio->u.isp2x.cdb[0], (unsigned long
3822                     int)sizeof(atio->u.isp2x.cdb));
3823
3824                 rc = qlt_handle_cmd_for_atio(vha, atio);
3825                 if (unlikely(rc != 0)) {
3826                         if (rc == -ESRCH) {
3827 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3828                                 qlt_send_busy(vha, atio, 0);
3829 #else
3830                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3831 #endif
3832                         } else {
3833                                 if (tgt->tgt_stop) {
3834                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3835                                             "qla_target: Unable to send "
3836                                             "command to target, sending TERM "
3837                                             "EXCHANGE for rsp\n");
3838                                         qlt_send_term_exchange(vha, NULL,
3839                                             atio, 1);
3840                                 } else {
3841                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
3842                                             "qla_target(%d): Unable to send "
3843                                             "command to target, sending BUSY "
3844                                             "status\n", vha->vp_idx);
3845                                         qlt_send_busy(vha, atio, 0);
3846                                 }
3847                         }
3848                 }
3849         }
3850         break;
3851
3852         case CONTINUE_TGT_IO_TYPE:
3853         {
3854                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3855                 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3856                     "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3857                 qlt_do_ctio_completion(vha, entry->handle,
3858                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3859                     entry);
3860                 break;
3861         }
3862
3863         case CTIO_A64_TYPE:
3864         {
3865                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3866                 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3867                     vha->vp_idx);
3868                 qlt_do_ctio_completion(vha, entry->handle,
3869                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3870                     entry);
3871                 break;
3872         }
3873
3874         case IMMED_NOTIFY_TYPE:
3875                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3876                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3877                 break;
3878
3879         case NOTIFY_ACK_TYPE:
3880                 if (tgt->notify_ack_expected > 0) {
3881                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3882                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
3883                             "NOTIFY_ACK seq %08x status %x\n",
3884                             le16_to_cpu(entry->u.isp2x.seq_id),
3885                             le16_to_cpu(entry->u.isp2x.status));
3886                         tgt->notify_ack_expected--;
3887                         if (entry->u.isp2x.status !=
3888                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3889                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3890                                     "qla_target(%d): NOTIFY_ACK "
3891                                     "failed %x\n", vha->vp_idx,
3892                                     le16_to_cpu(entry->u.isp2x.status));
3893                         }
3894                 } else {
3895                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
3896                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3897                             vha->vp_idx);
3898                 }
3899                 break;
3900
3901         case ABTS_RECV_24XX:
3902                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3903                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3904                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3905                 break;
3906
3907         case ABTS_RESP_24XX:
3908                 if (tgt->abts_resp_expected > 0) {
3909                         struct abts_resp_from_24xx_fw *entry =
3910                                 (struct abts_resp_from_24xx_fw *)pkt;
3911                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
3912                             "ABTS_RESP_24XX: compl_status %x\n",
3913                             entry->compl_status);
3914                         tgt->abts_resp_expected--;
3915                         if (le16_to_cpu(entry->compl_status) !=
3916                             ABTS_RESP_COMPL_SUCCESS) {
3917                                 if ((entry->error_subcode1 == 0x1E) &&
3918                                     (entry->error_subcode2 == 0)) {
3919                                         /*
3920                                          * We've got a race here: aborted
3921                                          * exchange not terminated, i.e.
3922                                          * response for the aborted command was
3923                                          * sent between the abort request was
3924                                          * received and processed.
3925                                          * Unfortunately, the firmware has a
3926                                          * silly requirement that all aborted
3927                                          * exchanges must be explicitely
3928                                          * terminated, otherwise it refuses to
3929                                          * send responses for the abort
3930                                          * requests. So, we have to
3931                                          * (re)terminate the exchange and retry
3932                                          * the abort response.
3933                                          */
3934                                         qlt_24xx_retry_term_exchange(vha,
3935                                             entry);
3936                                 } else
3937                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
3938                                             "qla_target(%d): ABTS_RESP_24XX "
3939                                             "failed %x (subcode %x:%x)",
3940                                             vha->vp_idx, entry->compl_status,
3941                                             entry->error_subcode1,
3942                                             entry->error_subcode2);
3943                         }
3944                 } else {
3945                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
3946                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
3947                             "received\n", vha->vp_idx);
3948                 }
3949                 break;
3950
3951         default:
3952                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3953                     "qla_target(%d): Received unknown response pkt "
3954                     "type %x\n", vha->vp_idx, pkt->entry_type);
3955                 break;
3956         }
3957
3958         tgt->irq_cmd_count--;
3959 }
3960
3961 /*
3962  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3963  */
3964 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3965         uint16_t *mailbox)
3966 {
3967         struct qla_hw_data *ha = vha->hw;
3968         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3969         int login_code;
3970
3971         ql_dbg(ql_dbg_tgt, vha, 0xe039,
3972             "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3973             vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3974             ha->operating_mode, ha->current_topology);
3975
3976         if (!ha->tgt.tgt_ops)
3977                 return;
3978
3979         if (unlikely(tgt == NULL)) {
3980                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3981                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3982                 return;
3983         }
3984
3985         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3986             IS_QLA2100(ha))
3987                 return;
3988         /*
3989          * In tgt_stop mode we also should allow all requests to pass.
3990          * Otherwise, some commands can stuck.
3991          */
3992
3993         tgt->irq_cmd_count++;
3994
3995         switch (code) {
3996         case MBA_RESET:                 /* Reset */
3997         case MBA_SYSTEM_ERR:            /* System Error */
3998         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
3999         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
4000                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4001                     "qla_target(%d): System error async event %#x "
4002                     "occurred", vha->vp_idx, code);
4003                 break;
4004         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
4005                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4006                 break;
4007
4008         case MBA_LOOP_UP:
4009         {
4010                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4011                     "qla_target(%d): Async LOOP_UP occurred "
4012                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4013                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4014                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4015                 if (tgt->link_reinit_iocb_pending) {
4016                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4017                             0, 0, 0, 0, 0, 0);
4018                         tgt->link_reinit_iocb_pending = 0;
4019                 }
4020                 break;
4021         }
4022
4023         case MBA_LIP_OCCURRED:
4024         case MBA_LOOP_DOWN:
4025         case MBA_LIP_RESET:
4026         case MBA_RSCN_UPDATE:
4027                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4028                     "qla_target(%d): Async event %#x occurred "
4029                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4030                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4031                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4032                 break;
4033
4034         case MBA_PORT_UPDATE:
4035                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4036                     "qla_target(%d): Port update async event %#x "
4037                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4038                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4039                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4040                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4041
4042                 login_code = le16_to_cpu(mailbox[2]);
4043                 if (login_code == 0x4)
4044                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4045                             "Async MB 2: Got PLOGI Complete\n");
4046                 else if (login_code == 0x7)
4047                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4048                             "Async MB 2: Port Logged Out\n");
4049                 break;
4050
4051         default:
4052                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
4053                     "qla_target(%d): Async event %#x occurred: "
4054                     "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4055                     code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4056                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4057                 break;
4058         }
4059
4060         tgt->irq_cmd_count--;
4061 }
4062
4063 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4064         uint16_t loop_id)
4065 {
4066         fc_port_t *fcport;
4067         int rc;
4068
4069         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4070         if (!fcport) {
4071                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4072                     "qla_target(%d): Allocation of tmp FC port failed",
4073                     vha->vp_idx);
4074                 return NULL;
4075         }
4076
4077         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
4078
4079         fcport->loop_id = loop_id;
4080
4081         rc = qla2x00_get_port_database(vha, fcport, 0);
4082         if (rc != QLA_SUCCESS) {
4083                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4084                     "qla_target(%d): Failed to retrieve fcport "
4085                     "information -- get_port_database() returned %x "
4086                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4087                 kfree(fcport);
4088                 return NULL;
4089         }
4090
4091         return fcport;
4092 }
4093
4094 /* Must be called under tgt_mutex */
4095 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4096         uint8_t *s_id)
4097 {
4098         struct qla_hw_data *ha = vha->hw;
4099         struct qla_tgt_sess *sess = NULL;
4100         fc_port_t *fcport = NULL;
4101         int rc, global_resets;
4102         uint16_t loop_id = 0;
4103
4104 retry:
4105         global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
4106
4107         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4108         if (rc != 0) {
4109                 if ((s_id[0] == 0xFF) &&
4110                     (s_id[1] == 0xFC)) {
4111                         /*
4112                          * This is Domain Controller, so it should be
4113                          * OK to drop SCSI commands from it.
4114                          */
4115                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4116                             "Unable to find initiator with S_ID %x:%x:%x",
4117                             s_id[0], s_id[1], s_id[2]);
4118                 } else
4119                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4120                             "qla_target(%d): Unable to find "
4121                             "initiator with S_ID %x:%x:%x",
4122                             vha->vp_idx, s_id[0], s_id[1],
4123                             s_id[2]);
4124                 return NULL;
4125         }
4126
4127         fcport = qlt_get_port_database(vha, loop_id);
4128         if (!fcport)
4129                 return NULL;
4130
4131         if (global_resets !=
4132             atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
4133                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4134                     "qla_target(%d): global reset during session discovery "
4135                     "(counter was %d, new %d), retrying", vha->vp_idx,
4136                     global_resets,
4137                     atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
4138                 goto retry;
4139         }
4140
4141         sess = qlt_create_sess(vha, fcport, true);
4142
4143         kfree(fcport);
4144         return sess;
4145 }
4146
4147 static void qlt_abort_work(struct qla_tgt *tgt,
4148         struct qla_tgt_sess_work_param *prm)
4149 {
4150         struct scsi_qla_host *vha = tgt->vha;
4151         struct qla_hw_data *ha = vha->hw;
4152         struct qla_tgt_sess *sess = NULL;
4153         unsigned long flags;
4154         uint32_t be_s_id;
4155         uint8_t s_id[3];
4156         int rc;
4157
4158         spin_lock_irqsave(&ha->hardware_lock, flags);
4159
4160         if (tgt->tgt_stop)
4161                 goto out_term;
4162
4163         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4164         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4165         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4166
4167         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4168             (unsigned char *)&be_s_id);
4169         if (!sess) {
4170                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4171
4172                 mutex_lock(&ha->tgt.tgt_mutex);
4173                 sess = qlt_make_local_sess(vha, s_id);
4174                 /* sess has got an extra creation ref */
4175                 mutex_unlock(&ha->tgt.tgt_mutex);
4176
4177                 spin_lock_irqsave(&ha->hardware_lock, flags);
4178                 if (!sess)
4179                         goto out_term;
4180         } else {
4181                 kref_get(&sess->se_sess->sess_kref);
4182         }
4183
4184         if (tgt->tgt_stop)
4185                 goto out_term;
4186
4187         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4188         if (rc != 0)
4189                 goto out_term;
4190         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4191
4192         ha->tgt.tgt_ops->put_sess(sess);
4193         return;
4194
4195 out_term:
4196         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4197         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4198         if (sess)
4199                 ha->tgt.tgt_ops->put_sess(sess);
4200 }
4201
4202 static void qlt_tmr_work(struct qla_tgt *tgt,
4203         struct qla_tgt_sess_work_param *prm)
4204 {
4205         struct atio_from_isp *a = &prm->tm_iocb2;
4206         struct scsi_qla_host *vha = tgt->vha;
4207         struct qla_hw_data *ha = vha->hw;
4208         struct qla_tgt_sess *sess = NULL;
4209         unsigned long flags;
4210         uint8_t *s_id = NULL; /* to hide compiler warnings */
4211         int rc;
4212         uint32_t lun, unpacked_lun;
4213         int lun_size, fn;
4214         void *iocb;
4215
4216         spin_lock_irqsave(&ha->hardware_lock, flags);
4217
4218         if (tgt->tgt_stop)
4219                 goto out_term;
4220
4221         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4222         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4223         if (!sess) {
4224                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4225
4226                 mutex_lock(&ha->tgt.tgt_mutex);
4227                 sess = qlt_make_local_sess(vha, s_id);
4228                 /* sess has got an extra creation ref */
4229                 mutex_unlock(&ha->tgt.tgt_mutex);
4230
4231                 spin_lock_irqsave(&ha->hardware_lock, flags);
4232                 if (!sess)
4233                         goto out_term;
4234         } else {
4235                 kref_get(&sess->se_sess->sess_kref);
4236         }
4237
4238         iocb = a;
4239         lun = a->u.isp24.fcp_cmnd.lun;
4240         lun_size = sizeof(lun);
4241         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4242         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4243
4244         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4245         if (rc != 0)
4246                 goto out_term;
4247         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4248
4249         ha->tgt.tgt_ops->put_sess(sess);
4250         return;
4251
4252 out_term:
4253         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4254         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4255         if (sess)
4256                 ha->tgt.tgt_ops->put_sess(sess);
4257 }
4258
4259 static void qlt_sess_work_fn(struct work_struct *work)
4260 {
4261         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4262         struct scsi_qla_host *vha = tgt->vha;
4263         unsigned long flags;
4264
4265         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4266
4267         spin_lock_irqsave(&tgt->sess_work_lock, flags);
4268         while (!list_empty(&tgt->sess_works_list)) {
4269                 struct qla_tgt_sess_work_param *prm = list_entry(
4270                     tgt->sess_works_list.next, typeof(*prm),
4271                     sess_works_list_entry);
4272
4273                 /*
4274                  * This work can be scheduled on several CPUs at time, so we
4275                  * must delete the entry to eliminate double processing
4276                  */
4277                 list_del(&prm->sess_works_list_entry);
4278
4279                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4280
4281                 switch (prm->type) {
4282                 case QLA_TGT_SESS_WORK_ABORT:
4283                         qlt_abort_work(tgt, prm);
4284                         break;
4285                 case QLA_TGT_SESS_WORK_TM:
4286                         qlt_tmr_work(tgt, prm);
4287                         break;
4288                 default:
4289                         BUG_ON(1);
4290                         break;
4291                 }
4292
4293                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4294
4295                 kfree(prm);
4296         }
4297         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4298 }
4299
4300 /* Must be called under tgt_host_action_mutex */
4301 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4302 {
4303         struct qla_tgt *tgt;
4304
4305         if (!QLA_TGT_MODE_ENABLED())
4306                 return 0;
4307
4308         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4309             "Registering target for host %ld(%p)", base_vha->host_no, ha);
4310
4311         BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL));
4312
4313         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4314         if (!tgt) {
4315                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4316                     "Unable to allocate struct qla_tgt\n");
4317                 return -ENOMEM;
4318         }
4319
4320         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4321                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4322
4323         tgt->ha = ha;
4324         tgt->vha = base_vha;
4325         init_waitqueue_head(&tgt->waitQ);
4326         INIT_LIST_HEAD(&tgt->sess_list);
4327         INIT_LIST_HEAD(&tgt->del_sess_list);
4328         INIT_DELAYED_WORK(&tgt->sess_del_work,
4329                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4330         spin_lock_init(&tgt->sess_work_lock);
4331         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4332         INIT_LIST_HEAD(&tgt->sess_works_list);
4333         spin_lock_init(&tgt->srr_lock);
4334         INIT_LIST_HEAD(&tgt->srr_ctio_list);
4335         INIT_LIST_HEAD(&tgt->srr_imm_list);
4336         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4337         atomic_set(&tgt->tgt_global_resets_count, 0);
4338
4339         ha->tgt.qla_tgt = tgt;
4340
4341         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4342                 "qla_target(%d): using 64 Bit PCI addressing",
4343                 base_vha->vp_idx);
4344         tgt->tgt_enable_64bit_addr = 1;
4345         /* 3 is reserved */
4346         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4347         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4348         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4349
4350         mutex_lock(&qla_tgt_mutex);
4351         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4352         mutex_unlock(&qla_tgt_mutex);
4353
4354         return 0;
4355 }
4356
4357 /* Must be called under tgt_host_action_mutex */
4358 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4359 {
4360         if (!ha->tgt.qla_tgt)
4361                 return 0;
4362
4363         mutex_lock(&qla_tgt_mutex);
4364         list_del(&ha->tgt.qla_tgt->tgt_list_entry);
4365         mutex_unlock(&qla_tgt_mutex);
4366
4367         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4368             vha->host_no, ha);
4369         qlt_release(ha->tgt.qla_tgt);
4370
4371         return 0;
4372 }
4373
4374 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4375         unsigned char *b)
4376 {
4377         int i;
4378
4379         pr_debug("qla2xxx HW vha->node_name: ");
4380         for (i = 0; i < WWN_SIZE; i++)
4381                 pr_debug("%02x ", vha->node_name[i]);
4382         pr_debug("\n");
4383         pr_debug("qla2xxx HW vha->port_name: ");
4384         for (i = 0; i < WWN_SIZE; i++)
4385                 pr_debug("%02x ", vha->port_name[i]);
4386         pr_debug("\n");
4387
4388         pr_debug("qla2xxx passed configfs WWPN: ");
4389         put_unaligned_be64(wwpn, b);
4390         for (i = 0; i < WWN_SIZE; i++)
4391                 pr_debug("%02x ", b[i]);
4392         pr_debug("\n");
4393 }
4394
4395 /**
4396  * qla_tgt_lport_register - register lport with external module
4397  *
4398  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4399  * @wwpn: Passwd FC target WWPN
4400  * @callback:  lport initialization callback for tcm_qla2xxx code
4401  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4402  */
4403 int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
4404         int (*callback)(struct scsi_qla_host *), void *target_lport_ptr)
4405 {
4406         struct qla_tgt *tgt;
4407         struct scsi_qla_host *vha;
4408         struct qla_hw_data *ha;
4409         struct Scsi_Host *host;
4410         unsigned long flags;
4411         int rc;
4412         u8 b[WWN_SIZE];
4413
4414         mutex_lock(&qla_tgt_mutex);
4415         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4416                 vha = tgt->vha;
4417                 ha = vha->hw;
4418
4419                 host = vha->host;
4420                 if (!host)
4421                         continue;
4422
4423                 if (ha->tgt.tgt_ops != NULL)
4424                         continue;
4425
4426                 if (!(host->hostt->supported_mode & MODE_TARGET))
4427                         continue;
4428
4429                 spin_lock_irqsave(&ha->hardware_lock, flags);
4430                 if (host->active_mode & MODE_TARGET) {
4431                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4432                             host->host_no);
4433                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4434                         continue;
4435                 }
4436                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4437
4438                 if (!scsi_host_get(host)) {
4439                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
4440                             "Unable to scsi_host_get() for"
4441                             " qla2xxx scsi_host\n");
4442                         continue;
4443                 }
4444                 qlt_lport_dump(vha, wwpn, b);
4445
4446                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4447                         scsi_host_put(host);
4448                         continue;
4449                 }
4450                 /*
4451                  * Setup passed parameters ahead of invoking callback
4452                  */
4453                 ha->tgt.tgt_ops = qla_tgt_ops;
4454                 ha->tgt.target_lport_ptr = target_lport_ptr;
4455                 rc = (*callback)(vha);
4456                 if (rc != 0) {
4457                         ha->tgt.tgt_ops = NULL;
4458                         ha->tgt.target_lport_ptr = NULL;
4459                 }
4460                 mutex_unlock(&qla_tgt_mutex);
4461                 return rc;
4462         }
4463         mutex_unlock(&qla_tgt_mutex);
4464
4465         return -ENODEV;
4466 }
4467 EXPORT_SYMBOL(qlt_lport_register);
4468
4469 /**
4470  * qla_tgt_lport_deregister - Degister lport
4471  *
4472  * @vha:  Registered scsi_qla_host pointer
4473  */
4474 void qlt_lport_deregister(struct scsi_qla_host *vha)
4475 {
4476         struct qla_hw_data *ha = vha->hw;
4477         struct Scsi_Host *sh = vha->host;
4478         /*
4479          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4480          */
4481         ha->tgt.target_lport_ptr = NULL;
4482         ha->tgt.tgt_ops = NULL;
4483         /*
4484          * Release the Scsi_Host reference for the underlying qla2xxx host
4485          */
4486         scsi_host_put(sh);
4487 }
4488 EXPORT_SYMBOL(qlt_lport_deregister);
4489
4490 /* Must be called under HW lock */
4491 void qlt_set_mode(struct scsi_qla_host *vha)
4492 {
4493         struct qla_hw_data *ha = vha->hw;
4494
4495         switch (ql2x_ini_mode) {
4496         case QLA2XXX_INI_MODE_DISABLED:
4497         case QLA2XXX_INI_MODE_EXCLUSIVE:
4498                 vha->host->active_mode = MODE_TARGET;
4499                 break;
4500         case QLA2XXX_INI_MODE_ENABLED:
4501                 vha->host->active_mode |= MODE_TARGET;
4502                 break;
4503         default:
4504                 break;
4505         }
4506
4507         if (ha->tgt.ini_mode_force_reverse)
4508                 qla_reverse_ini_mode(vha);
4509 }
4510
4511 /* Must be called under HW lock */
4512 void qlt_clear_mode(struct scsi_qla_host *vha)
4513 {
4514         struct qla_hw_data *ha = vha->hw;
4515
4516         switch (ql2x_ini_mode) {
4517         case QLA2XXX_INI_MODE_DISABLED:
4518                 vha->host->active_mode = MODE_UNKNOWN;
4519                 break;
4520         case QLA2XXX_INI_MODE_EXCLUSIVE:
4521                 vha->host->active_mode = MODE_INITIATOR;
4522                 break;
4523         case QLA2XXX_INI_MODE_ENABLED:
4524                 vha->host->active_mode &= ~MODE_TARGET;
4525                 break;
4526         default:
4527                 break;
4528         }
4529
4530         if (ha->tgt.ini_mode_force_reverse)
4531                 qla_reverse_ini_mode(vha);
4532 }
4533
4534 /*
4535  * qla_tgt_enable_vha - NO LOCK HELD
4536  *
4537  * host_reset, bring up w/ Target Mode Enabled
4538  */
4539 void
4540 qlt_enable_vha(struct scsi_qla_host *vha)
4541 {
4542         struct qla_hw_data *ha = vha->hw;
4543         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4544         unsigned long flags;
4545
4546         if (!tgt) {
4547                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4548                     "Unable to locate qla_tgt pointer from"
4549                     " struct qla_hw_data\n");
4550                 dump_stack();
4551                 return;
4552         }
4553
4554         spin_lock_irqsave(&ha->hardware_lock, flags);
4555         tgt->tgt_stopped = 0;
4556         qlt_set_mode(vha);
4557         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4558
4559         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4560         qla2xxx_wake_dpc(vha);
4561         qla2x00_wait_for_hba_online(vha);
4562 }
4563 EXPORT_SYMBOL(qlt_enable_vha);
4564
4565 /*
4566  * qla_tgt_disable_vha - NO LOCK HELD
4567  *
4568  * Disable Target Mode and reset the adapter
4569  */
4570 void
4571 qlt_disable_vha(struct scsi_qla_host *vha)
4572 {
4573         struct qla_hw_data *ha = vha->hw;
4574         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4575         unsigned long flags;
4576
4577         if (!tgt) {
4578                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4579                     "Unable to locate qla_tgt pointer from"
4580                     " struct qla_hw_data\n");
4581                 dump_stack();
4582                 return;
4583         }
4584
4585         spin_lock_irqsave(&ha->hardware_lock, flags);
4586         qlt_clear_mode(vha);
4587         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4588
4589         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4590         qla2xxx_wake_dpc(vha);
4591         qla2x00_wait_for_hba_online(vha);
4592 }
4593
4594 /*
4595  * Called from qla_init.c:qla24xx_vport_create() contex to setup
4596  * the target mode specific struct scsi_qla_host and struct qla_hw_data
4597  * members.
4598  */
4599 void
4600 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4601 {
4602         if (!qla_tgt_mode_enabled(vha))
4603                 return;
4604
4605         mutex_init(&ha->tgt.tgt_mutex);
4606         mutex_init(&ha->tgt.tgt_host_action_mutex);
4607
4608         qlt_clear_mode(vha);
4609
4610         /*
4611          * NOTE: Currently the value is kept the same for <24xx and
4612          * >=24xx ISPs. If it is necessary to change it,
4613          * the check should be added for specific ISPs,
4614          * assigning the value appropriately.
4615          */
4616         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4617 }
4618
4619 void
4620 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4621 {
4622         /*
4623          * FC-4 Feature bit 0 indicates target functionality to the name server.
4624          */
4625         if (qla_tgt_mode_enabled(vha)) {
4626                 if (qla_ini_mode_enabled(vha))
4627                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4628                 else
4629                         ct_req->req.rff_id.fc4_feature = BIT_0;
4630         } else if (qla_ini_mode_enabled(vha)) {
4631                 ct_req->req.rff_id.fc4_feature = BIT_1;
4632         }
4633 }
4634
4635 /*
4636  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4637  * @ha: HA context
4638  *
4639  * Beginning of ATIO ring has initialization control block already built
4640  * by nvram config routine.
4641  *
4642  * Returns 0 on success.
4643  */
4644 void
4645 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4646 {
4647         struct qla_hw_data *ha = vha->hw;
4648         uint16_t cnt;
4649         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4650
4651         if (!qla_tgt_mode_enabled(vha))
4652                 return;
4653
4654         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4655                 pkt->u.raw.signature = ATIO_PROCESSED;
4656                 pkt++;
4657         }
4658
4659 }
4660
4661 /*
4662  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4663  * @ha: SCSI driver HA context
4664  */
4665 void
4666 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4667 {
4668         struct qla_hw_data *ha = vha->hw;
4669         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
4670         struct atio_from_isp *pkt;
4671         int cnt, i;
4672
4673         if (!vha->flags.online)
4674                 return;
4675
4676         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4677                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4678                 cnt = pkt->u.raw.entry_count;
4679
4680                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4681
4682                 for (i = 0; i < cnt; i++) {
4683                         ha->tgt.atio_ring_index++;
4684                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4685                                 ha->tgt.atio_ring_index = 0;
4686                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4687                         } else
4688                                 ha->tgt.atio_ring_ptr++;
4689
4690                         pkt->u.raw.signature = ATIO_PROCESSED;
4691                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4692                 }
4693                 wmb();
4694         }
4695
4696         /* Adjust ring index */
4697         WRT_REG_DWORD(&reg->atio_q_out, ha->tgt.atio_ring_index);
4698 }
4699
4700 void
4701 qlt_24xx_config_rings(struct scsi_qla_host *vha, device_reg_t __iomem *reg)
4702 {
4703         struct qla_hw_data *ha = vha->hw;
4704
4705 /* FIXME: atio_q in/out for ha->mqenable=1..? */
4706         if (ha->mqenable) {
4707 #if 0
4708                 WRT_REG_DWORD(&reg->isp25mq.atio_q_in, 0);
4709                 WRT_REG_DWORD(&reg->isp25mq.atio_q_out, 0);
4710                 RD_REG_DWORD(&reg->isp25mq.atio_q_out);
4711 #endif
4712         } else {
4713                 /* Setup APTIO registers for target mode */
4714                 WRT_REG_DWORD(&reg->isp24.atio_q_in, 0);
4715                 WRT_REG_DWORD(&reg->isp24.atio_q_out, 0);
4716                 RD_REG_DWORD(&reg->isp24.atio_q_out);
4717         }
4718 }
4719
4720 void
4721 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4722 {
4723         struct qla_hw_data *ha = vha->hw;
4724
4725         if (qla_tgt_mode_enabled(vha)) {
4726                 if (!ha->tgt.saved_set) {
4727                         /* We save only once */
4728                         ha->tgt.saved_exchange_count = nv->exchange_count;
4729                         ha->tgt.saved_firmware_options_1 =
4730                             nv->firmware_options_1;
4731                         ha->tgt.saved_firmware_options_2 =
4732                             nv->firmware_options_2;
4733                         ha->tgt.saved_firmware_options_3 =
4734                             nv->firmware_options_3;
4735                         ha->tgt.saved_set = 1;
4736                 }
4737
4738                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4739
4740                 /* Enable target mode */
4741                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4742
4743                 /* Disable ini mode, if requested */
4744                 if (!qla_ini_mode_enabled(vha))
4745                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4746
4747                 /* Disable Full Login after LIP */
4748                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4749                 /* Enable initial LIP */
4750                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4751                 /* Enable FC tapes support */
4752                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4753                 /* Disable Full Login after LIP */
4754                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4755                 /* Enable target PRLI control */
4756                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4757         } else {
4758                 if (ha->tgt.saved_set) {
4759                         nv->exchange_count = ha->tgt.saved_exchange_count;
4760                         nv->firmware_options_1 =
4761                             ha->tgt.saved_firmware_options_1;
4762                         nv->firmware_options_2 =
4763                             ha->tgt.saved_firmware_options_2;
4764                         nv->firmware_options_3 =
4765                             ha->tgt.saved_firmware_options_3;
4766                 }
4767                 return;
4768         }
4769
4770         /* out-of-order frames reassembly */
4771         nv->firmware_options_3 |= BIT_6|BIT_9;
4772
4773         if (ha->tgt.enable_class_2) {
4774                 if (vha->flags.init_done)
4775                         fc_host_supported_classes(vha->host) =
4776                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4777
4778                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4779         } else {
4780                 if (vha->flags.init_done)
4781                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4782
4783                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4784         }
4785 }
4786
4787 void
4788 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4789         struct init_cb_24xx *icb)
4790 {
4791         struct qla_hw_data *ha = vha->hw;
4792
4793         if (ha->tgt.node_name_set) {
4794                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4795                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4796         }
4797 }
4798
4799 int
4800 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4801         struct sts_entry_24xx *pkt)
4802 {
4803         switch (pkt->entry_type) {
4804         case ABTS_RECV_24XX:
4805         case ABTS_RESP_24XX:
4806         case CTIO_TYPE7:
4807         case NOTIFY_ACK_TYPE:
4808                 return 1;
4809         default:
4810                 return 0;
4811         }
4812 }
4813
4814 void
4815 qlt_modify_vp_config(struct scsi_qla_host *vha,
4816         struct vp_config_entry_24xx *vpmod)
4817 {
4818         if (qla_tgt_mode_enabled(vha))
4819                 vpmod->options_idx1 &= ~BIT_5;
4820         /* Disable ini mode, if requested */
4821         if (!qla_ini_mode_enabled(vha))
4822                 vpmod->options_idx1 &= ~BIT_4;
4823 }
4824
4825 void
4826 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4827 {
4828         if (!QLA_TGT_MODE_ENABLED())
4829                 return;
4830
4831         mutex_init(&ha->tgt.tgt_mutex);
4832         mutex_init(&ha->tgt.tgt_host_action_mutex);
4833         qlt_clear_mode(base_vha);
4834 }
4835
4836 int
4837 qlt_mem_alloc(struct qla_hw_data *ha)
4838 {
4839         if (!QLA_TGT_MODE_ENABLED())
4840                 return 0;
4841
4842         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4843             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4844         if (!ha->tgt.tgt_vp_map)
4845                 return -ENOMEM;
4846
4847         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4848             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4849             &ha->tgt.atio_dma, GFP_KERNEL);
4850         if (!ha->tgt.atio_ring) {
4851                 kfree(ha->tgt.tgt_vp_map);
4852                 return -ENOMEM;
4853         }
4854         return 0;
4855 }
4856
4857 void
4858 qlt_mem_free(struct qla_hw_data *ha)
4859 {
4860         if (!QLA_TGT_MODE_ENABLED())
4861                 return;
4862
4863         if (ha->tgt.atio_ring) {
4864                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4865                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4866                     ha->tgt.atio_dma);
4867         }
4868         kfree(ha->tgt.tgt_vp_map);
4869 }
4870
4871 /* vport_slock to be held by the caller */
4872 void
4873 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4874 {
4875         if (!QLA_TGT_MODE_ENABLED())
4876                 return;
4877
4878         switch (cmd) {
4879         case SET_VP_IDX:
4880                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4881                 break;
4882         case SET_AL_PA:
4883                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4884                 break;
4885         case RESET_VP_IDX:
4886                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4887                 break;
4888         case RESET_AL_PA:
4889                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4890                 break;
4891         }
4892 }
4893
4894 static int __init qlt_parse_ini_mode(void)
4895 {
4896         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4897                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4898         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4899                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4900         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4901                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4902         else
4903                 return false;
4904
4905         return true;
4906 }
4907
4908 int __init qlt_init(void)
4909 {
4910         int ret;
4911
4912         if (!qlt_parse_ini_mode()) {
4913                 ql_log(ql_log_fatal, NULL, 0xe06b,
4914                     "qlt_parse_ini_mode() failed\n");
4915                 return -EINVAL;
4916         }
4917
4918         if (!QLA_TGT_MODE_ENABLED())
4919                 return 0;
4920
4921         qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4922             sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4923             NULL);
4924         if (!qla_tgt_cmd_cachep) {
4925                 ql_log(ql_log_fatal, NULL, 0xe06c,
4926                     "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4927                 return -ENOMEM;
4928         }
4929
4930         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4931             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4932             qla_tgt_mgmt_cmd), 0, NULL);
4933         if (!qla_tgt_mgmt_cmd_cachep) {
4934                 ql_log(ql_log_fatal, NULL, 0xe06d,
4935                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4936                 ret = -ENOMEM;
4937                 goto out;
4938         }
4939
4940         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4941             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4942         if (!qla_tgt_mgmt_cmd_mempool) {
4943                 ql_log(ql_log_fatal, NULL, 0xe06e,
4944                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4945                 ret = -ENOMEM;
4946                 goto out_mgmt_cmd_cachep;
4947         }
4948
4949         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4950         if (!qla_tgt_wq) {
4951                 ql_log(ql_log_fatal, NULL, 0xe06f,
4952                     "alloc_workqueue for qla_tgt_wq failed\n");
4953                 ret = -ENOMEM;
4954                 goto out_cmd_mempool;
4955         }
4956         /*
4957          * Return 1 to signal that initiator-mode is being disabled
4958          */
4959         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4960
4961 out_cmd_mempool:
4962         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4963 out_mgmt_cmd_cachep:
4964         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4965 out:
4966         kmem_cache_destroy(qla_tgt_cmd_cachep);
4967         return ret;
4968 }
4969
4970 void qlt_exit(void)
4971 {
4972         if (!QLA_TGT_MODE_ENABLED())
4973                 return;
4974
4975         destroy_workqueue(qla_tgt_wq);
4976         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4977         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4978         kmem_cache_destroy(qla_tgt_cmd_cachep);
4979 }