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) 2010-2013 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 int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"enabled\" (default) - initiator mode will always stay enabled.");
  59
  60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  61
  62 static int temp_sam_status = SAM_STAT_BUSY;
  63
  64 /*
  65  * From scsi/fc/fc_fcp.h
  66  */
  67 enum fcp_resp_rsp_codes {
  68         FCP_TMF_CMPL = 0,
  69         FCP_DATA_LEN_INVALID = 1,
  70         FCP_CMND_FIELDS_INVALID = 2,
  71         FCP_DATA_PARAM_MISMATCH = 3,
  72         FCP_TMF_REJECTED = 4,
  73         FCP_TMF_FAILED = 5,
  74         FCP_TMF_INVALID_LUN = 9,
  75 };
  76
  77 /*
  78  * fc_pri_ta from scsi/fc/fc_fcp.h
  79  */
  80 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  81 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  82 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  83 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  84 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  85 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  86 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  87
  88 /*
  89  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  90  * must be called under HW lock and could unlock/lock it inside.
  91  * It isn't an issue, since in the current implementation on the time when
  92  * those functions are called:
  93  *
  94  *   - Either context is IRQ and only IRQ handler can modify HW data,
  95  *     including rings related fields,
  96  *
  97  *   - Or access to target mode variables from struct qla_tgt doesn't
  98  *     cross those functions boundaries, except tgt_stop, which
  99  *     additionally protected by irq_cmd_count.
 100  */
 101 /* Predefs for callbacks handed to qla2xxx LLD */
 102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 103         struct atio_from_isp *pkt);
 104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
 105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
 106         int fn, void *iocb, int flags);
 107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 108         *cmd, struct atio_from_isp *atio, int ha_locked);
 109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 110         struct qla_tgt_srr_imm *imm, int ha_lock);
 111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
 112         struct qla_tgt_cmd *cmd);
 113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 114         struct atio_from_isp *atio, uint16_t status, int qfull);
 115 static void qlt_disable_vha(struct scsi_qla_host *vha);
 116 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 117 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 118         struct imm_ntfy_from_isp *ntfy,
 119         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 120         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 121 /*
 122  * Global Variables
 123  */
 124 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 125 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 126 static struct workqueue_struct *qla_tgt_wq;
 127 static DEFINE_MUTEX(qla_tgt_mutex);
 128 static LIST_HEAD(qla_tgt_glist);
 129
 130 /* This API intentionally takes dest as a parameter, rather than returning
 131  * int value to avoid caller forgetting to issue wmb() after the store */
 132 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 133 {
 134         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 135         *dest = atomic_inc_return(&base_vha->generation_tick);
 136         /* memory barrier */
 137         wmb();
 138 }
 139
 140 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 141 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 142         struct qla_tgt *tgt,
 143         const uint8_t *port_name)
 144 {
 145         struct qla_tgt_sess *sess;
 146
 147         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 148                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 149                         return sess;
 150         }
 151
 152         return NULL;
 153 }
 154
 155 /* Might release hw lock, then reaquire!! */
 156 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 157 {
 158         /* Send marker if required */
 159         if (unlikely(vha->marker_needed != 0)) {
 160                 int rc = qla2x00_issue_marker(vha, vha_locked);
 161                 if (rc != QLA_SUCCESS) {
 162                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 163                             "qla_target(%d): issue_marker() failed\n",
 164                             vha->vp_idx);
 165                 }
 166                 return rc;
 167         }
 168         return QLA_SUCCESS;
 169 }
 170
 171 static inline
 172 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 173         uint8_t *d_id)
 174 {
 175         struct qla_hw_data *ha = vha->hw;
 176         uint8_t vp_idx;
 177
 178         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 179                 return NULL;
 180
 181         if (vha->d_id.b.al_pa == d_id[2])
 182                 return vha;
 183
 184         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 185         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 186         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 187                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 188
 189         return NULL;
 190 }
 191
 192 static inline
 193 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 194         uint16_t vp_idx)
 195 {
 196         struct qla_hw_data *ha = vha->hw;
 197
 198         if (vha->vp_idx == vp_idx)
 199                 return vha;
 200
 201         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 202         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 203                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 204
 205         return NULL;
 206 }
 207
 208 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 209 {
 210         unsigned long flags;
 211
 212         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 213
 214         vha->hw->tgt.num_pend_cmds++;
 215         if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
 216                 vha->hw->qla_stats.stat_max_pend_cmds =
 217                         vha->hw->tgt.num_pend_cmds;
 218         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 219 }
 220 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 221 {
 222         unsigned long flags;
 223
 224         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 225         vha->hw->tgt.num_pend_cmds--;
 226         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 227 }
 228
 229 static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 230         struct atio_from_isp *atio)
 231 {
 232         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 233                 "%s: qla_target(%d): type %x ox_id %04x\n",
 234                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 235                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 236
 237         switch (atio->u.raw.entry_type) {
 238         case ATIO_TYPE7:
 239         {
 240                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 241                     atio->u.isp24.fcp_hdr.d_id);
 242                 if (unlikely(NULL == host)) {
 243                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 244                             "qla_target(%d): Received ATIO_TYPE7 "
 245                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 246                             atio->u.isp24.fcp_hdr.d_id[0],
 247                             atio->u.isp24.fcp_hdr.d_id[1],
 248                             atio->u.isp24.fcp_hdr.d_id[2]);
 249                         break;
 250                 }
 251                 qlt_24xx_atio_pkt(host, atio);
 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 *)atio;
 260
 261                 if ((entry->u.isp24.vp_index != 0xFF) &&
 262                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 263                         host = qlt_find_host_by_vp_idx(vha,
 264                             entry->u.isp24.vp_index);
 265                         if (unlikely(!host)) {
 266                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 267                                     "qla_target(%d): Received "
 268                                     "ATIO (IMMED_NOTIFY_TYPE) "
 269                                     "with unknown vp_index %d\n",
 270                                     vha->vp_idx, entry->u.isp24.vp_index);
 271                                 break;
 272                         }
 273                 }
 274                 qlt_24xx_atio_pkt(host, atio);
 275                 break;
 276         }
 277
 278         default:
 279                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 280                     "qla_target(%d): Received unknown ATIO atio "
 281                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 282                 break;
 283         }
 284
 285         return;
 286 }
 287
 288 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 289 {
 290         switch (pkt->entry_type) {
 291         case CTIO_CRC2:
 292                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 293                         "qla_target(%d):%s: CRC2 Response pkt\n",
 294                         vha->vp_idx, __func__);
 295         case CTIO_TYPE7:
 296         {
 297                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 298                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 299                     entry->vp_index);
 300                 if (unlikely(!host)) {
 301                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 302                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 303                             "received, with unknown vp_index %d\n",
 304                             vha->vp_idx, entry->vp_index);
 305                         break;
 306                 }
 307                 qlt_response_pkt(host, pkt);
 308                 break;
 309         }
 310
 311         case IMMED_NOTIFY_TYPE:
 312         {
 313                 struct scsi_qla_host *host = vha;
 314                 struct imm_ntfy_from_isp *entry =
 315                     (struct imm_ntfy_from_isp *)pkt;
 316
 317                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 318                 if (unlikely(!host)) {
 319                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 320                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 321                             "received, with unknown vp_index %d\n",
 322                             vha->vp_idx, entry->u.isp24.vp_index);
 323                         break;
 324                 }
 325                 qlt_response_pkt(host, pkt);
 326                 break;
 327         }
 328
 329         case NOTIFY_ACK_TYPE:
 330         {
 331                 struct scsi_qla_host *host = vha;
 332                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 333
 334                 if (0xFF != entry->u.isp24.vp_index) {
 335                         host = qlt_find_host_by_vp_idx(vha,
 336                             entry->u.isp24.vp_index);
 337                         if (unlikely(!host)) {
 338                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 339                                     "qla_target(%d): Response "
 340                                     "pkt (NOTIFY_ACK_TYPE) "
 341                                     "received, with unknown "
 342                                     "vp_index %d\n", vha->vp_idx,
 343                                     entry->u.isp24.vp_index);
 344                                 break;
 345                         }
 346                 }
 347                 qlt_response_pkt(host, pkt);
 348                 break;
 349         }
 350
 351         case ABTS_RECV_24XX:
 352         {
 353                 struct abts_recv_from_24xx *entry =
 354                     (struct abts_recv_from_24xx *)pkt;
 355                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 356                     entry->vp_index);
 357                 if (unlikely(!host)) {
 358                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 359                             "qla_target(%d): Response pkt "
 360                             "(ABTS_RECV_24XX) received, with unknown "
 361                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 362                         break;
 363                 }
 364                 qlt_response_pkt(host, pkt);
 365                 break;
 366         }
 367
 368         case ABTS_RESP_24XX:
 369         {
 370                 struct abts_resp_to_24xx *entry =
 371                     (struct abts_resp_to_24xx *)pkt;
 372                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 373                     entry->vp_index);
 374                 if (unlikely(!host)) {
 375                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 376                             "qla_target(%d): Response pkt "
 377                             "(ABTS_RECV_24XX) received, with unknown "
 378                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 379                         break;
 380                 }
 381                 qlt_response_pkt(host, pkt);
 382                 break;
 383         }
 384
 385         default:
 386                 qlt_response_pkt(vha, pkt);
 387                 break;
 388         }
 389
 390 }
 391
 392 static void qlt_free_session_done(struct work_struct *work)
 393 {
 394         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 395             free_work);
 396         struct qla_tgt *tgt = sess->tgt;
 397         struct scsi_qla_host *vha = sess->vha;
 398         struct qla_hw_data *ha = vha->hw;
 399         unsigned long flags;
 400         bool logout_started = false;
 401         fc_port_t fcport;
 402
 403         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 404                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 405                 " s_id %02x:%02x:%02x logout %d keep %d plogi %d\n",
 406                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 407                 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 408                 sess->logout_on_delete, sess->keep_nport_handle,
 409                 sess->plogi_ack_needed);
 410
 411         BUG_ON(!tgt);
 412
 413         if (sess->logout_on_delete) {
 414                 int rc;
 415
 416                 memset(&fcport, 0, sizeof(fcport));
 417                 fcport.loop_id = sess->loop_id;
 418                 fcport.d_id = sess->s_id;
 419                 memcpy(fcport.port_name, sess->port_name, WWN_SIZE);
 420                 fcport.vha = vha;
 421                 fcport.tgt_session = sess;
 422
 423                 rc = qla2x00_post_async_logout_work(vha, &fcport, NULL);
 424                 if (rc != QLA_SUCCESS)
 425                         ql_log(ql_log_warn, vha, 0xf085,
 426                                "Schedule logo failed sess %p rc %d\n",
 427                                sess, rc);
 428                 else
 429                         logout_started = true;
 430         }
 431
 432         /*
 433          * Release the target session for FC Nexus from fabric module code.
 434          */
 435         if (sess->se_sess != NULL)
 436                 ha->tgt.tgt_ops->free_session(sess);
 437
 438         if (logout_started) {
 439                 bool traced = false;
 440
 441                 while (!ACCESS_ONCE(sess->logout_completed)) {
 442                         if (!traced) {
 443                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
 444                                         "%s: waiting for sess %p logout\n",
 445                                         __func__, sess);
 446                                 traced = true;
 447                         }
 448                         msleep(100);
 449                 }
 450
 451                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
 452                         "%s: sess %p logout completed\n",
 453                         __func__, sess);
 454         }
 455
 456         spin_lock_irqsave(&ha->hardware_lock, flags);
 457
 458         if (sess->plogi_ack_needed)
 459                 qlt_send_notify_ack(vha, &sess->tm_iocb,
 460                                     0, 0, 0, 0, 0, 0);
 461
 462         list_del(&sess->sess_list_entry);
 463
 464         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 465
 466         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 467             "Unregistration of sess %p finished\n", sess);
 468
 469         kfree(sess);
 470         /*
 471          * We need to protect against race, when tgt is freed before or
 472          * inside wake_up()
 473          */
 474         tgt->sess_count--;
 475         if (tgt->sess_count == 0)
 476                 wake_up_all(&tgt->waitQ);
 477 }
 478
 479 /* ha->hardware_lock supposed to be held on entry */
 480 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 481 {
 482         struct scsi_qla_host *vha = sess->vha;
 483
 484         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 485
 486         if (!list_empty(&sess->del_list_entry))
 487                 list_del_init(&sess->del_list_entry);
 488         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 489
 490         INIT_WORK(&sess->free_work, qlt_free_session_done);
 491         schedule_work(&sess->free_work);
 492 }
 493 EXPORT_SYMBOL(qlt_unreg_sess);
 494
 495 /* ha->hardware_lock supposed to be held on entry */
 496 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 497 {
 498         struct qla_hw_data *ha = vha->hw;
 499         struct qla_tgt_sess *sess = NULL;
 500         uint32_t unpacked_lun, lun = 0;
 501         uint16_t loop_id;
 502         int res = 0;
 503         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 504         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 505
 506         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 507         if (loop_id == 0xFFFF) {
 508                 /* Global event */
 509                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
 510                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
 511 #if 0 /* FIXME: do we need to choose a session here? */
 512                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 513                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 514                             typeof(*sess), sess_list_entry);
 515                         switch (mcmd) {
 516                         case QLA_TGT_NEXUS_LOSS_SESS:
 517                                 mcmd = QLA_TGT_NEXUS_LOSS;
 518                                 break;
 519                         case QLA_TGT_ABORT_ALL_SESS:
 520                                 mcmd = QLA_TGT_ABORT_ALL;
 521                                 break;
 522                         case QLA_TGT_NEXUS_LOSS:
 523                         case QLA_TGT_ABORT_ALL:
 524                                 break;
 525                         default:
 526                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 527                                     "qla_target(%d): Not allowed "
 528                                     "command %x in %s", vha->vp_idx,
 529                                     mcmd, __func__);
 530                                 sess = NULL;
 531                                 break;
 532                         }
 533                 } else
 534                         sess = NULL;
 535 #endif
 536         } else {
 537                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 538         }
 539
 540         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 541             "Using sess for qla_tgt_reset: %p\n", sess);
 542         if (!sess) {
 543                 res = -ESRCH;
 544                 return res;
 545         }
 546
 547         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 548             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 549             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 550             mcmd, loop_id);
 551
 552         lun = a->u.isp24.fcp_cmnd.lun;
 553         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 554
 555         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 556             iocb, QLA24XX_MGMT_SEND_NACK);
 557 }
 558
 559 /* ha->hardware_lock supposed to be held on entry */
 560 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 561         bool immediate)
 562 {
 563         struct qla_tgt *tgt = sess->tgt;
 564         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 565
 566         if (sess->deleted) {
 567                 /* Upgrade to unconditional deletion in case it was temporary */
 568                 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
 569                         list_del(&sess->del_list_entry);
 570                 else
 571                         return;
 572         }
 573
 574         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 575             "Scheduling sess %p for deletion\n", sess);
 576
 577         if (immediate) {
 578                 dev_loss_tmo = 0;
 579                 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 580                 list_add(&sess->del_list_entry, &tgt->del_sess_list);
 581         } else {
 582                 sess->deleted = QLA_SESS_DELETION_PENDING;
 583                 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 584         }
 585
 586         sess->expires = jiffies + dev_loss_tmo * HZ;
 587
 588         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 589             "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
 590             " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
 591             sess->vha->vp_idx, sess->port_name, sess->loop_id,
 592             sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 593             dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
 594             sess->generation);
 595
 596         if (immediate)
 597                 mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
 598         else
 599                 schedule_delayed_work(&tgt->sess_del_work,
 600                     sess->expires - jiffies);
 601 }
 602
 603 /* ha->hardware_lock supposed to be held on entry */
 604 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
 605 {
 606         struct qla_tgt_sess *sess;
 607
 608         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 609                 qlt_schedule_sess_for_deletion(sess, true);
 610
 611         /* At this point tgt could be already dead */
 612 }
 613
 614 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 615         uint16_t *loop_id)
 616 {
 617         struct qla_hw_data *ha = vha->hw;
 618         dma_addr_t gid_list_dma;
 619         struct gid_list_info *gid_list;
 620         char *id_iter;
 621         int res, rc, i;
 622         uint16_t entries;
 623
 624         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 625             &gid_list_dma, GFP_KERNEL);
 626         if (!gid_list) {
 627                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 628                     "qla_target(%d): DMA Alloc failed of %u\n",
 629                     vha->vp_idx, qla2x00_gid_list_size(ha));
 630                 return -ENOMEM;
 631         }
 632
 633         /* Get list of logged in devices */
 634         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 635         if (rc != QLA_SUCCESS) {
 636                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 637                     "qla_target(%d): get_id_list() failed: %x\n",
 638                     vha->vp_idx, rc);
 639                 res = -1;
 640                 goto out_free_id_list;
 641         }
 642
 643         id_iter = (char *)gid_list;
 644         res = -1;
 645         for (i = 0; i < entries; i++) {
 646                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 647                 if ((gid->al_pa == s_id[2]) &&
 648                     (gid->area == s_id[1]) &&
 649                     (gid->domain == s_id[0])) {
 650                         *loop_id = le16_to_cpu(gid->loop_id);
 651                         res = 0;
 652                         break;
 653                 }
 654                 id_iter += ha->gid_list_info_size;
 655         }
 656
 657 out_free_id_list:
 658         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 659             gid_list, gid_list_dma);
 660         return res;
 661 }
 662
 663 /* ha->hardware_lock supposed to be held on entry */
 664 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 665 {
 666         BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
 667
 668         list_del_init(&sess->del_list_entry);
 669         sess->deleted = 0;
 670 }
 671
 672 static void qlt_del_sess_work_fn(struct delayed_work *work)
 673 {
 674         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 675             sess_del_work);
 676         struct scsi_qla_host *vha = tgt->vha;
 677         struct qla_hw_data *ha = vha->hw;
 678         struct qla_tgt_sess *sess;
 679         unsigned long flags, elapsed;
 680
 681         spin_lock_irqsave(&ha->hardware_lock, flags);
 682         while (!list_empty(&tgt->del_sess_list)) {
 683                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 684                     del_list_entry);
 685                 elapsed = jiffies;
 686                 if (time_after_eq(elapsed, sess->expires)) {
 687                         /* No turning back */
 688                         list_del_init(&sess->del_list_entry);
 689                         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 690
 691                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 692                             "Timeout: sess %p about to be deleted\n",
 693                             sess);
 694                         ha->tgt.tgt_ops->shutdown_sess(sess);
 695                         ha->tgt.tgt_ops->put_sess(sess);
 696                 } else {
 697                         schedule_delayed_work(&tgt->sess_del_work,
 698                             sess->expires - elapsed);
 699                         break;
 700                 }
 701         }
 702         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 703 }
 704
 705 /*
 706  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 707  * Caller must put it.
 708  */
 709 static struct qla_tgt_sess *qlt_create_sess(
 710         struct scsi_qla_host *vha,
 711         fc_port_t *fcport,
 712         bool local)
 713 {
 714         struct qla_hw_data *ha = vha->hw;
 715         struct qla_tgt_sess *sess;
 716         unsigned long flags;
 717         unsigned char be_sid[3];
 718
 719         /* Check to avoid double sessions */
 720         spin_lock_irqsave(&ha->hardware_lock, flags);
 721         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 722                                 sess_list_entry) {
 723                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 724                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 725                             "Double sess %p found (s_id %x:%x:%x, "
 726                             "loop_id %d), updating to d_id %x:%x:%x, "
 727                             "loop_id %d", sess, sess->s_id.b.domain,
 728                             sess->s_id.b.al_pa, sess->s_id.b.area,
 729                             sess->loop_id, fcport->d_id.b.domain,
 730                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 731                             fcport->loop_id);
 732
 733                         /* Cannot undelete at this point */
 734                         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
 735                                 spin_unlock_irqrestore(&ha->hardware_lock,
 736                                     flags);
 737                                 return NULL;
 738                         }
 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
 750                         qlt_do_generation_tick(vha, &sess->generation);
 751
 752                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 753
 754                         return sess;
 755                 }
 756         }
 757         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 758
 759         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 760         if (!sess) {
 761                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 762                     "qla_target(%u): session allocation failed, all commands "
 763                     "from port %8phC will be refused", vha->vp_idx,
 764                     fcport->port_name);
 765
 766                 return NULL;
 767         }
 768         sess->tgt = vha->vha_tgt.qla_tgt;
 769         sess->vha = vha;
 770         sess->s_id = fcport->d_id;
 771         sess->loop_id = fcport->loop_id;
 772         sess->local = local;
 773         INIT_LIST_HEAD(&sess->del_list_entry);
 774
 775         /* Under normal circumstances we want to logout from firmware when
 776          * session eventually ends and release corresponding nport handle.
 777          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
 778          * code will adjust these flags as necessary. */
 779         sess->logout_on_delete = 1;
 780         sess->keep_nport_handle = 0;
 781
 782         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 783             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 784             sess, vha->vha_tgt.qla_tgt);
 785
 786         be_sid[0] = sess->s_id.b.domain;
 787         be_sid[1] = sess->s_id.b.area;
 788         be_sid[2] = sess->s_id.b.al_pa;
 789         /*
 790          * Determine if this fc_port->port_name is allowed to access
 791          * target mode using explict NodeACLs+MappedLUNs, or using
 792          * TPG demo mode.  If this is successful a target mode FC nexus
 793          * is created.
 794          */
 795         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 796             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 797                 kfree(sess);
 798                 return NULL;
 799         }
 800         /*
 801          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 802          * access across ->hardware_lock reaquire.
 803          */
 804         kref_get(&sess->se_sess->sess_kref);
 805
 806         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 807         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 808         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 809
 810         spin_lock_irqsave(&ha->hardware_lock, flags);
 811         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 812         vha->vha_tgt.qla_tgt->sess_count++;
 813         qlt_do_generation_tick(vha, &sess->generation);
 814         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 815
 816         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 817             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 818             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 819             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 820             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 821             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 822
 823         return sess;
 824 }
 825
 826 /*
 827  * Called from qla2x00_reg_remote_port()
 828  */
 829 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 830 {
 831         struct qla_hw_data *ha = vha->hw;
 832         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 833         struct qla_tgt_sess *sess;
 834         unsigned long flags;
 835
 836         if (!vha->hw->tgt.tgt_ops)
 837                 return;
 838
 839         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 840                 return;
 841
 842         if (qla_ini_mode_enabled(vha))
 843                 return;
 844
 845         spin_lock_irqsave(&ha->hardware_lock, flags);
 846         if (tgt->tgt_stop) {
 847                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 848                 return;
 849         }
 850         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 851         if (!sess) {
 852                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 853
 854                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 855                 sess = qlt_create_sess(vha, fcport, false);
 856                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 857
 858                 spin_lock_irqsave(&ha->hardware_lock, flags);
 859         } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
 860                 /* Point of no return */
 861                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 862                 return;
 863         } else {
 864                 kref_get(&sess->se_sess->sess_kref);
 865
 866                 if (sess->deleted) {
 867                         qlt_undelete_sess(sess);
 868
 869                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 870                             "qla_target(%u): %ssession for port %8phC "
 871                             "(loop ID %d) reappeared\n", vha->vp_idx,
 872                             sess->local ? "local " : "", sess->port_name,
 873                             sess->loop_id);
 874
 875                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 876                             "Reappeared sess %p\n", sess);
 877                 }
 878                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 879                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 880         }
 881
 882         if (sess && sess->local) {
 883                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 884                     "qla_target(%u): local session for "
 885                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 886                     fcport->port_name, sess->loop_id);
 887                 sess->local = 0;
 888         }
 889         ha->tgt.tgt_ops->put_sess(sess);
 890         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 891 }
 892
 893 /*
 894  * max_gen - specifies maximum session generation
 895  * at which this deletion requestion is still valid
 896  */
 897 void
 898 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
 899 {
 900         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 901         struct qla_tgt_sess *sess;
 902
 903         if (!vha->hw->tgt.tgt_ops)
 904                 return;
 905
 906         if (!tgt)
 907                 return;
 908
 909         if (tgt->tgt_stop) {
 910                 return;
 911         }
 912         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 913         if (!sess) {
 914                 return;
 915         }
 916
 917         if (max_gen - sess->generation < 0) {
 918                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
 919                     "Ignoring stale deletion request for se_sess %p / sess %p"
 920                     " for port %8phC, req_gen %d, sess_gen %d\n",
 921                     sess->se_sess, sess, sess->port_name, max_gen,
 922                     sess->generation);
 923                 return;
 924         }
 925
 926         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 927
 928         sess->local = 1;
 929         qlt_schedule_sess_for_deletion(sess, false);
 930 }
 931
 932 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 933 {
 934         struct qla_hw_data *ha = tgt->ha;
 935         unsigned long flags;
 936         int res;
 937         /*
 938          * We need to protect against race, when tgt is freed before or
 939          * inside wake_up()
 940          */
 941         spin_lock_irqsave(&ha->hardware_lock, flags);
 942         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 943             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 944             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 945         res = (tgt->sess_count == 0);
 946         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 947
 948         return res;
 949 }
 950
 951 /* Called by tcm_qla2xxx configfs code */
 952 int qlt_stop_phase1(struct qla_tgt *tgt)
 953 {
 954         struct scsi_qla_host *vha = tgt->vha;
 955         struct qla_hw_data *ha = tgt->ha;
 956         unsigned long flags;
 957
 958         mutex_lock(&qla_tgt_mutex);
 959         if (!vha->fc_vport) {
 960                 struct Scsi_Host *sh = vha->host;
 961                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
 962                 bool npiv_vports;
 963
 964                 spin_lock_irqsave(sh->host_lock, flags);
 965                 npiv_vports = (fc_host->npiv_vports_inuse);
 966                 spin_unlock_irqrestore(sh->host_lock, flags);
 967
 968                 if (npiv_vports) {
 969                         mutex_unlock(&qla_tgt_mutex);
 970                         return -EPERM;
 971                 }
 972         }
 973         if (tgt->tgt_stop || tgt->tgt_stopped) {
 974                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 975                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 976                 mutex_unlock(&qla_tgt_mutex);
 977                 return -EPERM;
 978         }
 979
 980         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 981             vha->host_no, vha);
 982         /*
 983          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 984          * Lock is needed, because we still can get an incoming packet.
 985          */
 986         mutex_lock(&vha->vha_tgt.tgt_mutex);
 987         spin_lock_irqsave(&ha->hardware_lock, flags);
 988         tgt->tgt_stop = 1;
 989         qlt_clear_tgt_db(tgt);
 990         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 991         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 992         mutex_unlock(&qla_tgt_mutex);
 993
 994         flush_delayed_work(&tgt->sess_del_work);
 995
 996         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 997             "Waiting for sess works (tgt %p)", tgt);
 998         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 999         while (!list_empty(&tgt->sess_works_list)) {
1000                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1001                 flush_scheduled_work();
1002                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1003         }
1004         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1005
1006         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1007             "Waiting for tgt %p: list_empty(sess_list)=%d "
1008             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
1009             tgt->sess_count);
1010
1011         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1012
1013         /* Big hammer */
1014         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
1015                 qlt_disable_vha(vha);
1016
1017         /* Wait for sessions to clear out (just in case) */
1018         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1019         return 0;
1020 }
1021 EXPORT_SYMBOL(qlt_stop_phase1);
1022
1023 /* Called by tcm_qla2xxx configfs code */
1024 void qlt_stop_phase2(struct qla_tgt *tgt)
1025 {
1026         struct qla_hw_data *ha = tgt->ha;
1027         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1028         unsigned long flags;
1029
1030         if (tgt->tgt_stopped) {
1031                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1032                     "Already in tgt->tgt_stopped state\n");
1033                 dump_stack();
1034                 return;
1035         }
1036
1037         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1038             "Waiting for %d IRQ commands to complete (tgt %p)",
1039             tgt->irq_cmd_count, tgt);
1040
1041         mutex_lock(&vha->vha_tgt.tgt_mutex);
1042         spin_lock_irqsave(&ha->hardware_lock, flags);
1043         while (tgt->irq_cmd_count != 0) {
1044                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1045                 udelay(2);
1046                 spin_lock_irqsave(&ha->hardware_lock, flags);
1047         }
1048         tgt->tgt_stop = 0;
1049         tgt->tgt_stopped = 1;
1050         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1051         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1052
1053         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1054             tgt);
1055 }
1056 EXPORT_SYMBOL(qlt_stop_phase2);
1057
1058 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1059 static void qlt_release(struct qla_tgt *tgt)
1060 {
1061         scsi_qla_host_t *vha = tgt->vha;
1062
1063         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1064                 qlt_stop_phase2(tgt);
1065
1066         vha->vha_tgt.qla_tgt = NULL;
1067
1068         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1069             "Release of tgt %p finished\n", tgt);
1070
1071         kfree(tgt);
1072 }
1073
1074 /* ha->hardware_lock supposed to be held on entry */
1075 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1076         const void *param, unsigned int param_size)
1077 {
1078         struct qla_tgt_sess_work_param *prm;
1079         unsigned long flags;
1080
1081         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1082         if (!prm) {
1083                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1084                     "qla_target(%d): Unable to create session "
1085                     "work, command will be refused", 0);
1086                 return -ENOMEM;
1087         }
1088
1089         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1090             "Scheduling work (type %d, prm %p)"
1091             " to find session for param %p (size %d, tgt %p)\n",
1092             type, prm, param, param_size, tgt);
1093
1094         prm->type = type;
1095         memcpy(&prm->tm_iocb, param, param_size);
1096
1097         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1098         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1099         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1100
1101         schedule_work(&tgt->sess_work);
1102
1103         return 0;
1104 }
1105
1106 /*
1107  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1108  */
1109 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1110         struct imm_ntfy_from_isp *ntfy,
1111         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1112         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1113 {
1114         struct qla_hw_data *ha = vha->hw;
1115         request_t *pkt;
1116         struct nack_to_isp *nack;
1117
1118         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1119
1120         /* Send marker if required */
1121         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1122                 return;
1123
1124         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1125         if (!pkt) {
1126                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1127                     "qla_target(%d): %s failed: unable to allocate "
1128                     "request packet\n", vha->vp_idx, __func__);
1129                 return;
1130         }
1131
1132         if (vha->vha_tgt.qla_tgt != NULL)
1133                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1134
1135         pkt->entry_type = NOTIFY_ACK_TYPE;
1136         pkt->entry_count = 1;
1137
1138         nack = (struct nack_to_isp *)pkt;
1139         nack->ox_id = ntfy->ox_id;
1140
1141         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1142         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1143                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1144                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1145         }
1146         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1147         nack->u.isp24.status = ntfy->u.isp24.status;
1148         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1149         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1150         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1151         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1152         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1153         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1154         nack->u.isp24.srr_reject_code = srr_reject_code;
1155         nack->u.isp24.srr_reject_code_expl = srr_explan;
1156         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1157
1158         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1159             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1160             vha->vp_idx, nack->u.isp24.status);
1161
1162         /* Memory Barrier */
1163         wmb();
1164         qla2x00_start_iocbs(vha, vha->req);
1165 }
1166
1167 /*
1168  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1169  */
1170 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1171         struct abts_recv_from_24xx *abts, uint32_t status,
1172         bool ids_reversed)
1173 {
1174         struct qla_hw_data *ha = vha->hw;
1175         struct abts_resp_to_24xx *resp;
1176         uint32_t f_ctl;
1177         uint8_t *p;
1178
1179         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1180             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1181             ha, abts, status);
1182
1183         /* Send marker if required */
1184         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1185                 return;
1186
1187         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1188         if (!resp) {
1189                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1190                     "qla_target(%d): %s failed: unable to allocate "
1191                     "request packet", vha->vp_idx, __func__);
1192                 return;
1193         }
1194
1195         resp->entry_type = ABTS_RESP_24XX;
1196         resp->entry_count = 1;
1197         resp->nport_handle = abts->nport_handle;
1198         resp->vp_index = vha->vp_idx;
1199         resp->sof_type = abts->sof_type;
1200         resp->exchange_address = abts->exchange_address;
1201         resp->fcp_hdr_le = abts->fcp_hdr_le;
1202         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1203             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1204             F_CTL_SEQ_INITIATIVE);
1205         p = (uint8_t *)&f_ctl;
1206         resp->fcp_hdr_le.f_ctl[0] = *p++;
1207         resp->fcp_hdr_le.f_ctl[1] = *p++;
1208         resp->fcp_hdr_le.f_ctl[2] = *p;
1209         if (ids_reversed) {
1210                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1211                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1212                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1213                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1214                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1215                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1216         } else {
1217                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1218                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1219                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1220                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1221                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1222                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1223         }
1224         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1225         if (status == FCP_TMF_CMPL) {
1226                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1227                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1228                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1229                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1230                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1231                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1232         } else {
1233                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1234                 resp->payload.ba_rjt.reason_code =
1235                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1236                 /* Other bytes are zero */
1237         }
1238
1239         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1240
1241         /* Memory Barrier */
1242         wmb();
1243         qla2x00_start_iocbs(vha, vha->req);
1244 }
1245
1246 /*
1247  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1248  */
1249 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1250         struct abts_resp_from_24xx_fw *entry)
1251 {
1252         struct ctio7_to_24xx *ctio;
1253
1254         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1255             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1256         /* Send marker if required */
1257         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1258                 return;
1259
1260         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1261         if (ctio == NULL) {
1262                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1263                     "qla_target(%d): %s failed: unable to allocate "
1264                     "request packet\n", vha->vp_idx, __func__);
1265                 return;
1266         }
1267
1268         /*
1269          * We've got on entrance firmware's response on by us generated
1270          * ABTS response. So, in it ID fields are reversed.
1271          */
1272
1273         ctio->entry_type = CTIO_TYPE7;
1274         ctio->entry_count = 1;
1275         ctio->nport_handle = entry->nport_handle;
1276         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1277         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1278         ctio->vp_index = vha->vp_idx;
1279         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1280         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1281         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1282         ctio->exchange_addr = entry->exchange_addr_to_abort;
1283         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1284                                             CTIO7_FLAGS_TERMINATE);
1285         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1286
1287         /* Memory Barrier */
1288         wmb();
1289         qla2x00_start_iocbs(vha, vha->req);
1290
1291         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1292             FCP_TMF_CMPL, true);
1293 }
1294
1295 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1296 {
1297         struct qla_tgt_sess_op *op;
1298         struct qla_tgt_cmd *cmd;
1299
1300         spin_lock(&vha->cmd_list_lock);
1301
1302         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1303                 if (tag == op->atio.u.isp24.exchange_addr) {
1304                         op->aborted = true;
1305                         spin_unlock(&vha->cmd_list_lock);
1306                         return 1;
1307                 }
1308         }
1309
1310         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1311                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1312                         cmd->state = QLA_TGT_STATE_ABORTED;
1313                         spin_unlock(&vha->cmd_list_lock);
1314                         return 1;
1315                 }
1316         }
1317
1318         spin_unlock(&vha->cmd_list_lock);
1319         return 0;
1320 }
1321
1322 /* drop cmds for the given lun
1323  * XXX only looks for cmds on the port through which lun reset was recieved
1324  * XXX does not go through the list of other port (which may have cmds
1325  *     for the same lun)
1326  */
1327 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1328                                 uint32_t lun, uint8_t *s_id)
1329 {
1330         struct qla_tgt_sess_op *op;
1331         struct qla_tgt_cmd *cmd;
1332         uint32_t key;
1333
1334         key = sid_to_key(s_id);
1335         spin_lock(&vha->cmd_list_lock);
1336         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1337                 uint32_t op_key;
1338                 uint32_t op_lun;
1339
1340                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1341                 op_lun = scsilun_to_int(
1342                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1343                 if (op_key == key && op_lun == lun)
1344                         op->aborted = true;
1345         }
1346         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1347                 uint32_t cmd_key;
1348                 uint32_t cmd_lun;
1349
1350                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1351                 cmd_lun = scsilun_to_int(
1352                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1353                 if (cmd_key == key && cmd_lun == lun)
1354                         cmd->state = QLA_TGT_STATE_ABORTED;
1355         }
1356         spin_unlock(&vha->cmd_list_lock);
1357 }
1358
1359 /* ha->hardware_lock supposed to be held on entry */
1360 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1361         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1362 {
1363         struct qla_hw_data *ha = vha->hw;
1364         struct se_session *se_sess = sess->se_sess;
1365         struct qla_tgt_mgmt_cmd *mcmd;
1366         struct se_cmd *se_cmd;
1367         u32 lun = 0;
1368         int rc;
1369         bool found_lun = false;
1370
1371         spin_lock(&se_sess->sess_cmd_lock);
1372         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1373                 struct qla_tgt_cmd *cmd =
1374                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1375                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1376                         lun = cmd->unpacked_lun;
1377                         found_lun = true;
1378                         break;
1379                 }
1380         }
1381         spin_unlock(&se_sess->sess_cmd_lock);
1382
1383         /* cmd not in LIO lists, look in qla list */
1384         if (!found_lun) {
1385                 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1386                         /* send TASK_ABORT response immediately */
1387                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1388                         return 0;
1389                 } else {
1390                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1391                             "unable to find cmd in driver or LIO for tag 0x%x\n",
1392                             abts->exchange_addr_to_abort);
1393                         return -ENOENT;
1394                 }
1395         }
1396
1397         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1398             "qla_target(%d): task abort (tag=%d)\n",
1399             vha->vp_idx, abts->exchange_addr_to_abort);
1400
1401         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1402         if (mcmd == NULL) {
1403                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1404                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1405                     vha->vp_idx, __func__);
1406                 return -ENOMEM;
1407         }
1408         memset(mcmd, 0, sizeof(*mcmd));
1409
1410         mcmd->sess = sess;
1411         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1412         mcmd->reset_count = vha->hw->chip_reset;
1413
1414         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1415             abts->exchange_addr_to_abort);
1416         if (rc != 0) {
1417                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1418                     "qla_target(%d):  tgt_ops->handle_tmr()"
1419                     " failed: %d", vha->vp_idx, rc);
1420                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1421                 return -EFAULT;
1422         }
1423
1424         return 0;
1425 }
1426
1427 /*
1428  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1429  */
1430 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1431         struct abts_recv_from_24xx *abts)
1432 {
1433         struct qla_hw_data *ha = vha->hw;
1434         struct qla_tgt_sess *sess;
1435         uint32_t tag = abts->exchange_addr_to_abort;
1436         uint8_t s_id[3];
1437         int rc;
1438
1439         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1440                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1441                     "qla_target(%d): ABTS: Abort Sequence not "
1442                     "supported\n", vha->vp_idx);
1443                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1444                 return;
1445         }
1446
1447         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1448                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1449                     "qla_target(%d): ABTS: Unknown Exchange "
1450                     "Address received\n", vha->vp_idx);
1451                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1452                 return;
1453         }
1454
1455         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1456             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1457             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1458             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1459             le32_to_cpu(abts->fcp_hdr_le.parameter));
1460
1461         s_id[0] = abts->fcp_hdr_le.s_id[2];
1462         s_id[1] = abts->fcp_hdr_le.s_id[1];
1463         s_id[2] = abts->fcp_hdr_le.s_id[0];
1464
1465         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1466         if (!sess) {
1467                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1468                     "qla_target(%d): task abort for non-existant session\n",
1469                     vha->vp_idx);
1470                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1471                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1472                 if (rc != 0) {
1473                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1474                             false);
1475                 }
1476                 return;
1477         }
1478
1479         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1480                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1481                 return;
1482         }
1483
1484         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1485         if (rc != 0) {
1486                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1487                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1488                     vha->vp_idx, rc);
1489                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1490                 return;
1491         }
1492 }
1493
1494 /*
1495  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1496  */
1497 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1498         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1499 {
1500         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1501         struct ctio7_to_24xx *ctio;
1502         uint16_t temp;
1503
1504         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1505             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1506             ha, atio, resp_code);
1507
1508         /* Send marker if required */
1509         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1510                 return;
1511
1512         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1513         if (ctio == NULL) {
1514                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1515                     "qla_target(%d): %s failed: unable to allocate "
1516                     "request packet\n", ha->vp_idx, __func__);
1517                 return;
1518         }
1519
1520         ctio->entry_type = CTIO_TYPE7;
1521         ctio->entry_count = 1;
1522         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1523         ctio->nport_handle = mcmd->sess->loop_id;
1524         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1525         ctio->vp_index = ha->vp_idx;
1526         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1527         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1528         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1529         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1530         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1531             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1532         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1533         ctio->u.status1.ox_id = cpu_to_le16(temp);
1534         ctio->u.status1.scsi_status =
1535             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1536         ctio->u.status1.response_len = cpu_to_le16(8);
1537         ctio->u.status1.sense_data[0] = resp_code;
1538
1539         /* Memory Barrier */
1540         wmb();
1541         qla2x00_start_iocbs(ha, ha->req);
1542 }
1543
1544 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1545 {
1546         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1547 }
1548 EXPORT_SYMBOL(qlt_free_mcmd);
1549
1550 /* callback from target fabric module code */
1551 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1552 {
1553         struct scsi_qla_host *vha = mcmd->sess->vha;
1554         struct qla_hw_data *ha = vha->hw;
1555         unsigned long flags;
1556
1557         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1558             "TM response mcmd (%p) status %#x state %#x",
1559             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1560
1561         spin_lock_irqsave(&ha->hardware_lock, flags);
1562
1563         if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1564                 /*
1565                  * Either a chip reset is active or this request was from
1566                  * previous life, just abort the processing.
1567                  */
1568                 ql_dbg(ql_dbg_async, vha, 0xe100,
1569                         "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1570                         qla2x00_reset_active(vha), mcmd->reset_count,
1571                         ha->chip_reset);
1572                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1573                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1574                 return;
1575         }
1576
1577         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1578                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1579                     0, 0, 0, 0, 0, 0);
1580         else {
1581                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1582                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1583                             mcmd->fc_tm_rsp, false);
1584                 else
1585                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1586                             mcmd->fc_tm_rsp);
1587         }
1588         /*
1589          * Make the callback for ->free_mcmd() to queue_work() and invoke
1590          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1591          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1592          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1593          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1594          * qlt_xmit_tm_rsp() returns here..
1595          */
1596         ha->tgt.tgt_ops->free_mcmd(mcmd);
1597         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1598 }
1599 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1600
1601 /* No locks */
1602 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1603 {
1604         struct qla_tgt_cmd *cmd = prm->cmd;
1605
1606         BUG_ON(cmd->sg_cnt == 0);
1607
1608         prm->sg = (struct scatterlist *)cmd->sg;
1609         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1610             cmd->sg_cnt, cmd->dma_data_direction);
1611         if (unlikely(prm->seg_cnt == 0))
1612                 goto out_err;
1613
1614         prm->cmd->sg_mapped = 1;
1615
1616         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1617                 /*
1618                  * If greater than four sg entries then we need to allocate
1619                  * the continuation entries
1620                  */
1621                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1622                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1623                         prm->tgt->datasegs_per_cmd,
1624                         prm->tgt->datasegs_per_cont);
1625         } else {
1626                 /* DIF */
1627                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1628                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1629                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1630                         prm->tot_dsds = prm->seg_cnt;
1631                 } else
1632                         prm->tot_dsds = prm->seg_cnt;
1633
1634                 if (cmd->prot_sg_cnt) {
1635                         prm->prot_sg      = cmd->prot_sg;
1636                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1637                                 cmd->prot_sg, cmd->prot_sg_cnt,
1638                                 cmd->dma_data_direction);
1639                         if (unlikely(prm->prot_seg_cnt == 0))
1640                                 goto out_err;
1641
1642                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1643                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1644                                 /* Dif Bundling not support here */
1645                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1646                                                                 cmd->blk_sz);
1647                                 prm->tot_dsds += prm->prot_seg_cnt;
1648                         } else
1649                                 prm->tot_dsds += prm->prot_seg_cnt;
1650                 }
1651         }
1652
1653         return 0;
1654
1655 out_err:
1656         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1657             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1658             0, prm->cmd->sg_cnt);
1659         return -1;
1660 }
1661
1662 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1663 {
1664         struct qla_hw_data *ha = vha->hw;
1665
1666         if (!cmd->sg_mapped)
1667                 return;
1668
1669         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1670         cmd->sg_mapped = 0;
1671
1672         if (cmd->prot_sg_cnt)
1673                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1674                         cmd->dma_data_direction);
1675
1676         if (cmd->ctx_dsd_alloced)
1677                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1678
1679         if (cmd->ctx)
1680                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1681 }
1682
1683 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1684         uint32_t req_cnt)
1685 {
1686         uint32_t cnt, cnt_in;
1687
1688         if (vha->req->cnt < (req_cnt + 2)) {
1689                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1690                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1691
1692                 if  (vha->req->ring_index < cnt)
1693                         vha->req->cnt = cnt - vha->req->ring_index;
1694                 else
1695                         vha->req->cnt = vha->req->length -
1696                             (vha->req->ring_index - cnt);
1697         }
1698
1699         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1700                 ql_dbg(ql_dbg_io, vha, 0x305a,
1701                     "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
1702                     vha->vp_idx, vha->req->ring_index,
1703                     vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1704                 return -EAGAIN;
1705         }
1706         vha->req->cnt -= req_cnt;
1707
1708         return 0;
1709 }
1710
1711 /*
1712  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1713  */
1714 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1715 {
1716         /* Adjust ring index. */
1717         vha->req->ring_index++;
1718         if (vha->req->ring_index == vha->req->length) {
1719                 vha->req->ring_index = 0;
1720                 vha->req->ring_ptr = vha->req->ring;
1721         } else {
1722                 vha->req->ring_ptr++;
1723         }
1724         return (cont_entry_t *)vha->req->ring_ptr;
1725 }
1726
1727 /* ha->hardware_lock supposed to be held on entry */
1728 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1729 {
1730         struct qla_hw_data *ha = vha->hw;
1731         uint32_t h;
1732
1733         h = ha->tgt.current_handle;
1734         /* always increment cmd handle */
1735         do {
1736                 ++h;
1737                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1738                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1739                 if (h == ha->tgt.current_handle) {
1740                         ql_dbg(ql_dbg_io, vha, 0x305b,
1741                             "qla_target(%d): Ran out of "
1742                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1743                         h = QLA_TGT_NULL_HANDLE;
1744                         break;
1745                 }
1746         } while ((h == QLA_TGT_NULL_HANDLE) ||
1747             (h == QLA_TGT_SKIP_HANDLE) ||
1748             (ha->tgt.cmds[h-1] != NULL));
1749
1750         if (h != QLA_TGT_NULL_HANDLE)
1751                 ha->tgt.current_handle = h;
1752
1753         return h;
1754 }
1755
1756 /* ha->hardware_lock supposed to be held on entry */
1757 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1758         struct scsi_qla_host *vha)
1759 {
1760         uint32_t h;
1761         struct ctio7_to_24xx *pkt;
1762         struct qla_hw_data *ha = vha->hw;
1763         struct atio_from_isp *atio = &prm->cmd->atio;
1764         uint16_t temp;
1765
1766         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1767         prm->pkt = pkt;
1768         memset(pkt, 0, sizeof(*pkt));
1769
1770         pkt->entry_type = CTIO_TYPE7;
1771         pkt->entry_count = (uint8_t)prm->req_cnt;
1772         pkt->vp_index = vha->vp_idx;
1773
1774         h = qlt_make_handle(vha);
1775         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1776                 /*
1777                  * CTIO type 7 from the firmware doesn't provide a way to
1778                  * know the initiator's LOOP ID, hence we can't find
1779                  * the session and, so, the command.
1780                  */
1781                 return -EAGAIN;
1782         } else
1783                 ha->tgt.cmds[h-1] = prm->cmd;
1784
1785         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1786         pkt->nport_handle = prm->cmd->loop_id;
1787         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1788         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1789         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1790         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1791         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1792         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1793         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1794         pkt->u.status0.ox_id = cpu_to_le16(temp);
1795         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1796
1797         return 0;
1798 }
1799
1800 /*
1801  * ha->hardware_lock supposed to be held on entry. We have already made sure
1802  * that there is sufficient amount of request entries to not drop it.
1803  */
1804 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1805         struct scsi_qla_host *vha)
1806 {
1807         int cnt;
1808         uint32_t *dword_ptr;
1809         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1810
1811         /* Build continuation packets */
1812         while (prm->seg_cnt > 0) {
1813                 cont_a64_entry_t *cont_pkt64 =
1814                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1815
1816                 /*
1817                  * Make sure that from cont_pkt64 none of
1818                  * 64-bit specific fields used for 32-bit
1819                  * addressing. Cast to (cont_entry_t *) for
1820                  * that.
1821                  */
1822
1823                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1824
1825                 cont_pkt64->entry_count = 1;
1826                 cont_pkt64->sys_define = 0;
1827
1828                 if (enable_64bit_addressing) {
1829                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1830                         dword_ptr =
1831                             (uint32_t *)&cont_pkt64->dseg_0_address;
1832                 } else {
1833                         cont_pkt64->entry_type = CONTINUE_TYPE;
1834                         dword_ptr =
1835                             (uint32_t *)&((cont_entry_t *)
1836                                 cont_pkt64)->dseg_0_address;
1837                 }
1838
1839                 /* Load continuation entry data segments */
1840                 for (cnt = 0;
1841                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1842                     cnt++, prm->seg_cnt--) {
1843                         *dword_ptr++ =
1844                             cpu_to_le32(pci_dma_lo32
1845                                 (sg_dma_address(prm->sg)));
1846                         if (enable_64bit_addressing) {
1847                                 *dword_ptr++ =
1848                                     cpu_to_le32(pci_dma_hi32
1849                                         (sg_dma_address
1850                                         (prm->sg)));
1851                         }
1852                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1853
1854                         prm->sg = sg_next(prm->sg);
1855                 }
1856         }
1857 }
1858
1859 /*
1860  * ha->hardware_lock supposed to be held on entry. We have already made sure
1861  * that there is sufficient amount of request entries to not drop it.
1862  */
1863 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1864         struct scsi_qla_host *vha)
1865 {
1866         int cnt;
1867         uint32_t *dword_ptr;
1868         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1869         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1870
1871         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1872
1873         /* Setup packet address segment pointer */
1874         dword_ptr = pkt24->u.status0.dseg_0_address;
1875
1876         /* Set total data segment count */
1877         if (prm->seg_cnt)
1878                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1879
1880         if (prm->seg_cnt == 0) {
1881                 /* No data transfer */
1882                 *dword_ptr++ = 0;
1883                 *dword_ptr = 0;
1884                 return;
1885         }
1886
1887         /* If scatter gather */
1888
1889         /* Load command entry data segments */
1890         for (cnt = 0;
1891             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1892             cnt++, prm->seg_cnt--) {
1893                 *dword_ptr++ =
1894                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1895                 if (enable_64bit_addressing) {
1896                         *dword_ptr++ =
1897                             cpu_to_le32(pci_dma_hi32(
1898                                 sg_dma_address(prm->sg)));
1899                 }
1900                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1901
1902                 prm->sg = sg_next(prm->sg);
1903         }
1904
1905         qlt_load_cont_data_segments(prm, vha);
1906 }
1907
1908 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1909 {
1910         return cmd->bufflen > 0;
1911 }
1912
1913 /*
1914  * Called without ha->hardware_lock held
1915  */
1916 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1917         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1918         uint32_t *full_req_cnt)
1919 {
1920         struct qla_tgt *tgt = cmd->tgt;
1921         struct scsi_qla_host *vha = tgt->vha;
1922         struct qla_hw_data *ha = vha->hw;
1923         struct se_cmd *se_cmd = &cmd->se_cmd;
1924
1925         prm->cmd = cmd;
1926         prm->tgt = tgt;
1927         prm->rq_result = scsi_status;
1928         prm->sense_buffer = &cmd->sense_buffer[0];
1929         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1930         prm->sg = NULL;
1931         prm->seg_cnt = -1;
1932         prm->req_cnt = 1;
1933         prm->add_status_pkt = 0;
1934
1935         /* Send marker if required */
1936         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1937                 return -EFAULT;
1938
1939         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1940                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1941                         return -EAGAIN;
1942         }
1943
1944         *full_req_cnt = prm->req_cnt;
1945
1946         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1947                 prm->residual = se_cmd->residual_count;
1948                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1949                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1950                        prm->residual, se_cmd->tag,
1951                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1952                        cmd->bufflen, prm->rq_result);
1953                 prm->rq_result |= SS_RESIDUAL_UNDER;
1954         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1955                 prm->residual = se_cmd->residual_count;
1956                 ql_dbg(ql_dbg_io, vha, 0x305d,
1957                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1958                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
1959                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
1960                 prm->rq_result |= SS_RESIDUAL_OVER;
1961         }
1962
1963         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1964                 /*
1965                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1966                  * ignored in *xmit_response() below
1967                  */
1968                 if (qlt_has_data(cmd)) {
1969                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1970                             (IS_FWI2_CAPABLE(ha) &&
1971                             (prm->rq_result != 0))) {
1972                                 prm->add_status_pkt = 1;
1973                                 (*full_req_cnt)++;
1974                         }
1975                 }
1976         }
1977
1978         return 0;
1979 }
1980
1981 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1982         struct qla_tgt_cmd *cmd, int sending_sense)
1983 {
1984         if (ha->tgt.enable_class_2)
1985                 return 0;
1986
1987         if (sending_sense)
1988                 return cmd->conf_compl_supported;
1989         else
1990                 return ha->tgt.enable_explicit_conf &&
1991                     cmd->conf_compl_supported;
1992 }
1993
1994 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1995 /*
1996  *  Original taken from the XFS code
1997  */
1998 static unsigned long qlt_srr_random(void)
1999 {
2000         static int Inited;
2001         static unsigned long RandomValue;
2002         static DEFINE_SPINLOCK(lock);
2003         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2004         register long rv;
2005         register long lo;
2006         register long hi;
2007         unsigned long flags;
2008
2009         spin_lock_irqsave(&lock, flags);
2010         if (!Inited) {
2011                 RandomValue = jiffies;
2012                 Inited = 1;
2013         }
2014         rv = RandomValue;
2015         hi = rv / 127773;
2016         lo = rv % 127773;
2017         rv = 16807 * lo - 2836 * hi;
2018         if (rv <= 0)
2019                 rv += 2147483647;
2020         RandomValue = rv;
2021         spin_unlock_irqrestore(&lock, flags);
2022         return rv;
2023 }
2024
2025 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2026 {
2027 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2028         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2029             == 50) {
2030                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2031                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2032                     "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2033         }
2034 #endif
2035         /*
2036          * It's currently not possible to simulate SRRs for FCP_WRITE without
2037          * a physical link layer failure, so don't even try here..
2038          */
2039         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2040                 return;
2041
2042         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2043             ((qlt_srr_random() % 100) == 20)) {
2044                 int i, leave = 0;
2045                 unsigned int tot_len = 0;
2046
2047                 while (leave == 0)
2048                         leave = qlt_srr_random() % cmd->sg_cnt;
2049
2050                 for (i = 0; i < leave; i++)
2051                         tot_len += cmd->sg[i].length;
2052
2053                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2054                     "Cutting cmd %p (tag %d) buffer"
2055                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2056                     " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2057                     cmd->bufflen, cmd->sg_cnt);
2058
2059                 cmd->bufflen = tot_len;
2060                 cmd->sg_cnt = leave;
2061         }
2062
2063         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2064                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2065
2066                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2067                     "Cutting cmd %p (tag %d) buffer head "
2068                     "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2069                     cmd->bufflen);
2070                 if (offset == 0)
2071                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
2072                 else if (qlt_set_data_offset(cmd, offset)) {
2073                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2074                             "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2075                 }
2076         }
2077 }
2078 #else
2079 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2080 {}
2081 #endif
2082
2083 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2084         struct qla_tgt_prm *prm)
2085 {
2086         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2087             (uint32_t)sizeof(ctio->u.status1.sense_data));
2088         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2089         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2090                 ctio->u.status0.flags |= cpu_to_le16(
2091                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2092                     CTIO7_FLAGS_CONFORM_REQ);
2093         }
2094         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2095         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2096         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2097                 int i;
2098
2099                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2100                         if (prm->cmd->se_cmd.scsi_status != 0) {
2101                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2102                                     "Skipping EXPLICIT_CONFORM and "
2103                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2104                                     "non GOOD status\n");
2105                                 goto skip_explict_conf;
2106                         }
2107                         ctio->u.status1.flags |= cpu_to_le16(
2108                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2109                             CTIO7_FLAGS_CONFORM_REQ);
2110                 }
2111 skip_explict_conf:
2112                 ctio->u.status1.flags &=
2113                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2114                 ctio->u.status1.flags |=
2115                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2116                 ctio->u.status1.scsi_status |=
2117                     cpu_to_le16(SS_SENSE_LEN_VALID);
2118                 ctio->u.status1.sense_length =
2119                     cpu_to_le16(prm->sense_buffer_len);
2120                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2121                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2122                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2123 #if 0
2124                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2125                         static int q;
2126                         if (q < 10) {
2127                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2128                                     "qla_target(%d): %d bytes of sense "
2129                                     "lost", prm->tgt->ha->vp_idx,
2130                                     prm->sense_buffer_len % 4);
2131                                 q++;
2132                         }
2133                 }
2134 #endif
2135         } else {
2136                 ctio->u.status1.flags &=
2137                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2138                 ctio->u.status1.flags |=
2139                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2140                 ctio->u.status1.sense_length = 0;
2141                 memset(ctio->u.status1.sense_data, 0,
2142                     sizeof(ctio->u.status1.sense_data));
2143         }
2144
2145         /* Sense with len > 24, is it possible ??? */
2146 }
2147
2148
2149
2150 /* diff  */
2151 static inline int
2152 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2153 {
2154         /*
2155          * Uncomment when corresponding SCSI changes are done.
2156          *
2157          if (!sp->cmd->prot_chk)
2158          return 0;
2159          *
2160          */
2161         switch (se_cmd->prot_op) {
2162         case TARGET_PROT_DOUT_INSERT:
2163         case TARGET_PROT_DIN_STRIP:
2164                 if (ql2xenablehba_err_chk >= 1)
2165                         return 1;
2166                 break;
2167         case TARGET_PROT_DOUT_PASS:
2168         case TARGET_PROT_DIN_PASS:
2169                 if (ql2xenablehba_err_chk >= 2)
2170                         return 1;
2171                 break;
2172         case TARGET_PROT_DIN_INSERT:
2173         case TARGET_PROT_DOUT_STRIP:
2174                 return 1;
2175         default:
2176                 break;
2177         }
2178         return 0;
2179 }
2180
2181 /*
2182  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2183  *
2184  */
2185 static inline void
2186 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2187 {
2188         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2189
2190         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2191          * have been immplemented by TCM, before AppTag is avail.
2192          * Look for modesense_handlers[]
2193          */
2194         ctx->app_tag = 0;
2195         ctx->app_tag_mask[0] = 0x0;
2196         ctx->app_tag_mask[1] = 0x0;
2197
2198         switch (se_cmd->prot_type) {
2199         case TARGET_DIF_TYPE0_PROT:
2200                 /*
2201                  * No check for ql2xenablehba_err_chk, as it would be an
2202                  * I/O error if hba tag generation is not done.
2203                  */
2204                 ctx->ref_tag = cpu_to_le32(lba);
2205
2206                 if (!qlt_hba_err_chk_enabled(se_cmd))
2207                         break;
2208
2209                 /* enable ALL bytes of the ref tag */
2210                 ctx->ref_tag_mask[0] = 0xff;
2211                 ctx->ref_tag_mask[1] = 0xff;
2212                 ctx->ref_tag_mask[2] = 0xff;
2213                 ctx->ref_tag_mask[3] = 0xff;
2214                 break;
2215         /*
2216          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2217          * 16 bit app tag.
2218          */
2219         case TARGET_DIF_TYPE1_PROT:
2220                 ctx->ref_tag = cpu_to_le32(lba);
2221
2222                 if (!qlt_hba_err_chk_enabled(se_cmd))
2223                         break;
2224
2225                 /* enable ALL bytes of the ref tag */
2226                 ctx->ref_tag_mask[0] = 0xff;
2227                 ctx->ref_tag_mask[1] = 0xff;
2228                 ctx->ref_tag_mask[2] = 0xff;
2229                 ctx->ref_tag_mask[3] = 0xff;
2230                 break;
2231         /*
2232          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2233          * match LBA in CDB + N
2234          */
2235         case TARGET_DIF_TYPE2_PROT:
2236                 ctx->ref_tag = cpu_to_le32(lba);
2237
2238                 if (!qlt_hba_err_chk_enabled(se_cmd))
2239                         break;
2240
2241                 /* enable ALL bytes of the ref tag */
2242                 ctx->ref_tag_mask[0] = 0xff;
2243                 ctx->ref_tag_mask[1] = 0xff;
2244                 ctx->ref_tag_mask[2] = 0xff;
2245                 ctx->ref_tag_mask[3] = 0xff;
2246                 break;
2247
2248         /* For Type 3 protection: 16 bit GUARD only */
2249         case TARGET_DIF_TYPE3_PROT:
2250                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2251                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2252                 break;
2253         }
2254 }
2255
2256
2257 static inline int
2258 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2259 {
2260         uint32_t                *cur_dsd;
2261         uint32_t                transfer_length = 0;
2262         uint32_t                data_bytes;
2263         uint32_t                dif_bytes;
2264         uint8_t                 bundling = 1;
2265         uint8_t                 *clr_ptr;
2266         struct crc_context      *crc_ctx_pkt = NULL;
2267         struct qla_hw_data      *ha;
2268         struct ctio_crc2_to_fw  *pkt;
2269         dma_addr_t              crc_ctx_dma;
2270         uint16_t                fw_prot_opts = 0;
2271         struct qla_tgt_cmd      *cmd = prm->cmd;
2272         struct se_cmd           *se_cmd = &cmd->se_cmd;
2273         uint32_t h;
2274         struct atio_from_isp *atio = &prm->cmd->atio;
2275         uint16_t t16;
2276
2277         ha = vha->hw;
2278
2279         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2280         prm->pkt = pkt;
2281         memset(pkt, 0, sizeof(*pkt));
2282
2283         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2284                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2285                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2286                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2287
2288         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2289             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2290                 bundling = 0;
2291
2292         /* Compute dif len and adjust data len to incude protection */
2293         data_bytes = cmd->bufflen;
2294         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2295
2296         switch (se_cmd->prot_op) {
2297         case TARGET_PROT_DIN_INSERT:
2298         case TARGET_PROT_DOUT_STRIP:
2299                 transfer_length = data_bytes;
2300                 data_bytes += dif_bytes;
2301                 break;
2302
2303         case TARGET_PROT_DIN_STRIP:
2304         case TARGET_PROT_DOUT_INSERT:
2305         case TARGET_PROT_DIN_PASS:
2306         case TARGET_PROT_DOUT_PASS:
2307                 transfer_length = data_bytes + dif_bytes;
2308                 break;
2309
2310         default:
2311                 BUG();
2312                 break;
2313         }
2314
2315         if (!qlt_hba_err_chk_enabled(se_cmd))
2316                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2317         /* HBA error checking enabled */
2318         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2319                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2320                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2321                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2322                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2323                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2324         }
2325
2326         switch (se_cmd->prot_op) {
2327         case TARGET_PROT_DIN_INSERT:
2328         case TARGET_PROT_DOUT_INSERT:
2329                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2330                 break;
2331         case TARGET_PROT_DIN_STRIP:
2332         case TARGET_PROT_DOUT_STRIP:
2333                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2334                 break;
2335         case TARGET_PROT_DIN_PASS:
2336         case TARGET_PROT_DOUT_PASS:
2337                 fw_prot_opts |= PO_MODE_DIF_PASS;
2338                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2339                 break;
2340         default:/* Normal Request */
2341                 fw_prot_opts |= PO_MODE_DIF_PASS;
2342                 break;
2343         }
2344
2345
2346         /* ---- PKT ---- */
2347         /* Update entry type to indicate Command Type CRC_2 IOCB */
2348         pkt->entry_type  = CTIO_CRC2;
2349         pkt->entry_count = 1;
2350         pkt->vp_index = vha->vp_idx;
2351
2352         h = qlt_make_handle(vha);
2353         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2354                 /*
2355                  * CTIO type 7 from the firmware doesn't provide a way to
2356                  * know the initiator's LOOP ID, hence we can't find
2357                  * the session and, so, the command.
2358                  */
2359                 return -EAGAIN;
2360         } else
2361                 ha->tgt.cmds[h-1] = prm->cmd;
2362
2363
2364         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2365         pkt->nport_handle = prm->cmd->loop_id;
2366         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2367         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2368         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2369         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2370         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2371
2372         /* silence compile warning */
2373         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2374         pkt->ox_id  = cpu_to_le16(t16);
2375
2376         t16 = (atio->u.isp24.attr << 9);
2377         pkt->flags |= cpu_to_le16(t16);
2378         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2379
2380         /* Set transfer direction */
2381         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2382                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2383         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2384                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2385
2386
2387         pkt->dseg_count = prm->tot_dsds;
2388         /* Fibre channel byte count */
2389         pkt->transfer_length = cpu_to_le32(transfer_length);
2390
2391
2392         /* ----- CRC context -------- */
2393
2394         /* Allocate CRC context from global pool */
2395         crc_ctx_pkt = cmd->ctx =
2396             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2397
2398         if (!crc_ctx_pkt)
2399                 goto crc_queuing_error;
2400
2401         /* Zero out CTX area. */
2402         clr_ptr = (uint8_t *)crc_ctx_pkt;
2403         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2404
2405         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2406         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2407
2408         /* Set handle */
2409         crc_ctx_pkt->handle = pkt->handle;
2410
2411         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2412
2413         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2414         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2415         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2416
2417
2418         if (!bundling) {
2419                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2420         } else {
2421                 /*
2422                  * Configure Bundling if we need to fetch interlaving
2423                  * protection PCI accesses
2424                  */
2425                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2426                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2427                 crc_ctx_pkt->u.bundling.dseg_count =
2428                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2429                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2430         }
2431
2432         /* Finish the common fields of CRC pkt */
2433         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2434         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2435         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2436         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2437
2438
2439         /* Walks data segments */
2440         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2441
2442         if (!bundling && prm->prot_seg_cnt) {
2443                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2444                         prm->tot_dsds, cmd))
2445                         goto crc_queuing_error;
2446         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2447                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2448                 goto crc_queuing_error;
2449
2450         if (bundling && prm->prot_seg_cnt) {
2451                 /* Walks dif segments */
2452                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2453
2454                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2455                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2456                         prm->prot_seg_cnt, cmd))
2457                         goto crc_queuing_error;
2458         }
2459         return QLA_SUCCESS;
2460
2461 crc_queuing_error:
2462         /* Cleanup will be performed by the caller */
2463
2464         return QLA_FUNCTION_FAILED;
2465 }
2466
2467
2468 /*
2469  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2470  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2471  */
2472 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2473         uint8_t scsi_status)
2474 {
2475         struct scsi_qla_host *vha = cmd->vha;
2476         struct qla_hw_data *ha = vha->hw;
2477         struct ctio7_to_24xx *pkt;
2478         struct qla_tgt_prm prm;
2479         uint32_t full_req_cnt = 0;
2480         unsigned long flags = 0;
2481         int res;
2482
2483         spin_lock_irqsave(&ha->hardware_lock, flags);
2484         if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2485                 cmd->state = QLA_TGT_STATE_PROCESSED;
2486                 if (cmd->sess->logout_completed)
2487                         /* no need to terminate. FW already freed exchange. */
2488                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2489                 else
2490                         qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2491                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2492                 return 0;
2493         }
2494         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2495
2496         memset(&prm, 0, sizeof(prm));
2497         qlt_check_srr_debug(cmd, &xmit_type);
2498
2499         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2500             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2501             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2502             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2503             &cmd->se_cmd);
2504
2505         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2506             &full_req_cnt);
2507         if (unlikely(res != 0)) {
2508                 return res;
2509         }
2510
2511         spin_lock_irqsave(&ha->hardware_lock, flags);
2512
2513         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2514                 /*
2515                  * Either a chip reset is active or this request was from
2516                  * previous life, just abort the processing.
2517                  */
2518                 cmd->state = QLA_TGT_STATE_PROCESSED;
2519                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2520                 ql_dbg(ql_dbg_async, vha, 0xe101,
2521                         "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2522                         qla2x00_reset_active(vha), cmd->reset_count,
2523                         ha->chip_reset);
2524                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2525                 return 0;
2526         }
2527
2528         /* Does F/W have an IOCBs for this request */
2529         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2530         if (unlikely(res))
2531                 goto out_unmap_unlock;
2532
2533         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2534                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2535         else
2536                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2537         if (unlikely(res != 0)) {
2538                 vha->req->cnt += full_req_cnt;
2539                 goto out_unmap_unlock;
2540         }
2541
2542         pkt = (struct ctio7_to_24xx *)prm.pkt;
2543
2544         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2545                 pkt->u.status0.flags |=
2546                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2547                         CTIO7_FLAGS_STATUS_MODE_0);
2548
2549                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2550                         qlt_load_data_segments(&prm, vha);
2551
2552                 if (prm.add_status_pkt == 0) {
2553                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2554                                 pkt->u.status0.scsi_status =
2555                                     cpu_to_le16(prm.rq_result);
2556                                 pkt->u.status0.residual =
2557                                     cpu_to_le32(prm.residual);
2558                                 pkt->u.status0.flags |= cpu_to_le16(
2559                                     CTIO7_FLAGS_SEND_STATUS);
2560                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2561                                         pkt->u.status0.flags |=
2562                                             cpu_to_le16(
2563                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2564                                                 CTIO7_FLAGS_CONFORM_REQ);
2565                                 }
2566                         }
2567
2568                 } else {
2569                         /*
2570                          * We have already made sure that there is sufficient
2571                          * amount of request entries to not drop HW lock in
2572                          * req_pkt().
2573                          */
2574                         struct ctio7_to_24xx *ctio =
2575                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2576
2577                         ql_dbg(ql_dbg_io, vha, 0x305e,
2578                             "Building additional status packet 0x%p.\n",
2579                             ctio);
2580
2581                         /*
2582                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2583                          * ctio7_to_24xx
2584                          */
2585                         memcpy(ctio, pkt, sizeof(*ctio));
2586                         /* reset back to CTIO7 */
2587                         ctio->entry_count = 1;
2588                         ctio->entry_type = CTIO_TYPE7;
2589                         ctio->dseg_count = 0;
2590                         ctio->u.status1.flags &= ~cpu_to_le16(
2591                             CTIO7_FLAGS_DATA_IN);
2592
2593                         /* Real finish is ctio_m1's finish */
2594                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2595                         pkt->u.status0.flags |= cpu_to_le16(
2596                             CTIO7_FLAGS_DONT_RET_CTIO);
2597
2598                         /* qlt_24xx_init_ctio_to_isp will correct
2599                          * all neccessary fields that's part of CTIO7.
2600                          * There should be no residual of CTIO-CRC2 data.
2601                          */
2602                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2603                             &prm);
2604                         pr_debug("Status CTIO7: %p\n", ctio);
2605                 }
2606         } else
2607                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2608
2609
2610         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2611         cmd->cmd_sent_to_fw = 1;
2612
2613         /* Memory Barrier */
2614         wmb();
2615         qla2x00_start_iocbs(vha, vha->req);
2616         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2617
2618         return 0;
2619
2620 out_unmap_unlock:
2621         qlt_unmap_sg(vha, cmd);
2622         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2623
2624         return res;
2625 }
2626 EXPORT_SYMBOL(qlt_xmit_response);
2627
2628 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2629 {
2630         struct ctio7_to_24xx *pkt;
2631         struct scsi_qla_host *vha = cmd->vha;
2632         struct qla_hw_data *ha = vha->hw;
2633         struct qla_tgt *tgt = cmd->tgt;
2634         struct qla_tgt_prm prm;
2635         unsigned long flags;
2636         int res = 0;
2637
2638         memset(&prm, 0, sizeof(prm));
2639         prm.cmd = cmd;
2640         prm.tgt = tgt;
2641         prm.sg = NULL;
2642         prm.req_cnt = 1;
2643
2644         /* Send marker if required */
2645         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2646                 return -EIO;
2647
2648         /* Calculate number of entries and segments required */
2649         if (qlt_pci_map_calc_cnt(&prm) != 0)
2650                 return -EAGAIN;
2651
2652         spin_lock_irqsave(&ha->hardware_lock, flags);
2653
2654         if (qla2x00_reset_active(vha) || (cmd->reset_count != ha->chip_reset) ||
2655             (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2656                 /*
2657                  * Either a chip reset is active or this request was from
2658                  * previous life, just abort the processing.
2659                  */
2660                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2661                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2662                 ql_dbg(ql_dbg_async, vha, 0xe102,
2663                         "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2664                         qla2x00_reset_active(vha), cmd->reset_count,
2665                         ha->chip_reset);
2666                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2667                 return 0;
2668         }
2669
2670         /* Does F/W have an IOCBs for this request */
2671         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2672         if (res != 0)
2673                 goto out_unlock_free_unmap;
2674         if (cmd->se_cmd.prot_op)
2675                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2676         else
2677                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2678
2679         if (unlikely(res != 0)) {
2680                 vha->req->cnt += prm.req_cnt;
2681                 goto out_unlock_free_unmap;
2682         }
2683
2684         pkt = (struct ctio7_to_24xx *)prm.pkt;
2685         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2686             CTIO7_FLAGS_STATUS_MODE_0);
2687
2688         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2689                 qlt_load_data_segments(&prm, vha);
2690
2691         cmd->state = QLA_TGT_STATE_NEED_DATA;
2692         cmd->cmd_sent_to_fw = 1;
2693
2694         /* Memory Barrier */
2695         wmb();
2696         qla2x00_start_iocbs(vha, vha->req);
2697         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2698
2699         return res;
2700
2701 out_unlock_free_unmap:
2702         qlt_unmap_sg(vha, cmd);
2703         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2704
2705         return res;
2706 }
2707 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2708
2709
2710 /*
2711  * Checks the guard or meta-data for the type of error
2712  * detected by the HBA.
2713  */
2714 static inline int
2715 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2716                 struct ctio_crc_from_fw *sts)
2717 {
2718         uint8_t         *ap = &sts->actual_dif[0];
2719         uint8_t         *ep = &sts->expected_dif[0];
2720         uint32_t        e_ref_tag, a_ref_tag;
2721         uint16_t        e_app_tag, a_app_tag;
2722         uint16_t        e_guard, a_guard;
2723         uint64_t        lba = cmd->se_cmd.t_task_lba;
2724
2725         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2726         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2727         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2728
2729         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2730         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2731         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2732
2733         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2734             "iocb(s) %p Returned STATUS.\n", sts);
2735
2736         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2737             "dif check TGT cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x]\n",
2738             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2739             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2740
2741         /*
2742          * Ignore sector if:
2743          * For type     3: ref & app tag is all 'f's
2744          * For type 0,1,2: app tag is all 'f's
2745          */
2746         if ((a_app_tag == 0xffff) &&
2747             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2748              (a_ref_tag == 0xffffffff))) {
2749                 uint32_t blocks_done;
2750
2751                 /* 2TB boundary case covered automatically with this */
2752                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2753                 cmd->se_cmd.bad_sector = e_ref_tag;
2754                 cmd->se_cmd.pi_err = 0;
2755                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2756                         "need to return scsi good\n");
2757
2758                 /* Update protection tag */
2759                 if (cmd->prot_sg_cnt) {
2760                         uint32_t i, k = 0, num_ent;
2761                         struct scatterlist *sg, *sgl;
2762
2763
2764                         sgl = cmd->prot_sg;
2765
2766                         /* Patch the corresponding protection tags */
2767                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2768                                 num_ent = sg_dma_len(sg) / 8;
2769                                 if (k + num_ent < blocks_done) {
2770                                         k += num_ent;
2771                                         continue;
2772                                 }
2773                                 k = blocks_done;
2774                                 break;
2775                         }
2776
2777                         if (k != blocks_done) {
2778                                 ql_log(ql_log_warn, vha, 0xf076,
2779                                     "unexpected tag values tag:lba=%u:%llu)\n",
2780                                     e_ref_tag, (unsigned long long)lba);
2781                                 goto out;
2782                         }
2783
2784 #if 0
2785                         struct sd_dif_tuple *spt;
2786                         /* TODO:
2787                          * This section came from initiator. Is it valid here?
2788                          * should ulp be override with actual val???
2789                          */
2790                         spt = page_address(sg_page(sg)) + sg->offset;
2791                         spt += j;
2792
2793                         spt->app_tag = 0xffff;
2794                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2795                                 spt->ref_tag = 0xffffffff;
2796 #endif
2797                 }
2798
2799                 return 0;
2800         }
2801
2802         /* check guard */
2803         if (e_guard != a_guard) {
2804                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2805                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2806
2807                 ql_log(ql_log_warn, vha, 0xe076,
2808                     "Guard ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2809                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2810                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2811                     a_guard, e_guard, cmd);
2812                 goto out;
2813         }
2814
2815         /* check ref tag */
2816         if (e_ref_tag != a_ref_tag) {
2817                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2818                 cmd->se_cmd.bad_sector = e_ref_tag;
2819
2820                 ql_log(ql_log_warn, vha, 0xe077,
2821                         "Ref Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2822                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2823                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2824                         a_guard, e_guard, cmd);
2825                 goto out;
2826         }
2827
2828         /* check appl tag */
2829         if (e_app_tag != a_app_tag) {
2830                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2831                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2832
2833                 ql_log(ql_log_warn, vha, 0xe078,
2834                         "App Tag ERR: cdb 0x%x lba 0x%llx: [Actual|Expected] Ref Tag[0x%x|0x%x], App Tag [0x%x|0x%x], Guard [0x%x|0x%x] cmd=%p\n",
2835                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2836                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2837                         a_guard, e_guard, cmd);
2838                 goto out;
2839         }
2840 out:
2841         return 1;
2842 }
2843
2844
2845 /* If hardware_lock held on entry, might drop it, then reaquire */
2846 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2847 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
2848         struct imm_ntfy_from_isp *ntfy)
2849 {
2850         struct nack_to_isp *nack;
2851         struct qla_hw_data *ha = vha->hw;
2852         request_t *pkt;
2853         int ret = 0;
2854
2855         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
2856             "Sending TERM ELS CTIO (ha=%p)\n", ha);
2857
2858         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2859         if (pkt == NULL) {
2860                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
2861                     "qla_target(%d): %s failed: unable to allocate "
2862                     "request packet\n", vha->vp_idx, __func__);
2863                 return -ENOMEM;
2864         }
2865
2866         pkt->entry_type = NOTIFY_ACK_TYPE;
2867         pkt->entry_count = 1;
2868         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2869
2870         nack = (struct nack_to_isp *)pkt;
2871         nack->ox_id = ntfy->ox_id;
2872
2873         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
2874         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
2875                 nack->u.isp24.flags = ntfy->u.isp24.flags &
2876                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
2877         }
2878
2879         /* terminate */
2880         nack->u.isp24.flags |=
2881                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
2882
2883         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
2884         nack->u.isp24.status = ntfy->u.isp24.status;
2885         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
2886         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
2887         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
2888         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
2889         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
2890         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
2891
2892         qla2x00_start_iocbs(vha, vha->req);
2893         return ret;
2894 }
2895
2896 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
2897         struct imm_ntfy_from_isp *imm, int ha_locked)
2898 {
2899         unsigned long flags = 0;
2900         int rc;
2901
2902         if (qlt_issue_marker(vha, ha_locked) < 0)
2903                 return;
2904
2905         if (ha_locked) {
2906                 rc = __qlt_send_term_imm_notif(vha, imm);
2907
2908 #if 0   /* Todo  */
2909                 if (rc == -ENOMEM)
2910                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
2911 #endif
2912                 goto done;
2913         }
2914
2915         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2916         rc = __qlt_send_term_imm_notif(vha, imm);
2917
2918 #if 0   /* Todo */
2919         if (rc == -ENOMEM)
2920                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
2921 #endif
2922
2923 done:
2924         if (!ha_locked)
2925                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2926 }
2927
2928 /* If hardware_lock held on entry, might drop it, then reaquire */
2929 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2930 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2931         struct qla_tgt_cmd *cmd,
2932         struct atio_from_isp *atio)
2933 {
2934         struct ctio7_to_24xx *ctio24;
2935         struct qla_hw_data *ha = vha->hw;
2936         request_t *pkt;
2937         int ret = 0;
2938         uint16_t temp;
2939
2940         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2941
2942         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2943         if (pkt == NULL) {
2944                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2945                     "qla_target(%d): %s failed: unable to allocate "
2946                     "request packet\n", vha->vp_idx, __func__);
2947                 return -ENOMEM;
2948         }
2949
2950         if (cmd != NULL) {
2951                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2952                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2953                             "qla_target(%d): Terminating cmd %p with "
2954                             "incorrect state %d\n", vha->vp_idx, cmd,
2955                             cmd->state);
2956                 } else
2957                         ret = 1;
2958         }
2959
2960         pkt->entry_count = 1;
2961         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2962
2963         ctio24 = (struct ctio7_to_24xx *)pkt;
2964         ctio24->entry_type = CTIO_TYPE7;
2965         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2966         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2967         ctio24->vp_index = vha->vp_idx;
2968         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2969         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2970         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2971         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2972         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2973             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2974                 CTIO7_FLAGS_TERMINATE);
2975         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2976         ctio24->u.status1.ox_id = cpu_to_le16(temp);
2977
2978         /* Most likely, it isn't needed */
2979         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2980             &atio->u.isp24.fcp_cmnd.add_cdb[
2981             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2982         if (ctio24->u.status1.residual != 0)
2983                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2984
2985         /* Memory Barrier */
2986         wmb();
2987         qla2x00_start_iocbs(vha, vha->req);
2988         return ret;
2989 }
2990
2991 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2992         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2993 {
2994         unsigned long flags = 0;
2995         int rc;
2996
2997         if (qlt_issue_marker(vha, ha_locked) < 0)
2998                 return;
2999
3000         if (ha_locked) {
3001                 rc = __qlt_send_term_exchange(vha, cmd, atio);
3002                 if (rc == -ENOMEM)
3003                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3004                 goto done;
3005         }
3006         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3007         rc = __qlt_send_term_exchange(vha, cmd, atio);
3008         if (rc == -ENOMEM)
3009                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3010
3011 done:
3012         if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
3013             !cmd->cmd_sent_to_fw)) {
3014                 if (cmd->sg_mapped)
3015                         qlt_unmap_sg(vha, cmd);
3016                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3017         }
3018
3019         if (!ha_locked)
3020                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3021
3022         return;
3023 }
3024
3025 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3026 {
3027         struct list_head free_list;
3028         struct qla_tgt_cmd *cmd, *tcmd;
3029
3030         vha->hw->tgt.leak_exchg_thresh_hold =
3031             (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3032
3033         cmd = tcmd = NULL;
3034         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3035                 INIT_LIST_HEAD(&free_list);
3036                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3037
3038                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3039                         list_del(&cmd->cmd_list);
3040                         /* This cmd was never sent to TCM.  There is no need
3041                          * to schedule free or call free_cmd
3042                          */
3043                         qlt_free_cmd(cmd);
3044                         vha->hw->tgt.num_qfull_cmds_alloc--;
3045                 }
3046         }
3047         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3048 }
3049
3050 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3051 {
3052         uint32_t total_leaked;
3053
3054         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3055
3056         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3057             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3058
3059                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3060                     "Chip reset due to exchange starvation: %d/%d.\n",
3061                     total_leaked, vha->hw->fw_xcb_count);
3062
3063                 if (IS_P3P_TYPE(vha->hw))
3064                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3065                 else
3066                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3067                 qla2xxx_wake_dpc(vha);
3068         }
3069
3070 }
3071
3072 void qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3073 {
3074         struct qla_tgt *tgt = cmd->tgt;
3075         struct scsi_qla_host *vha = tgt->vha;
3076         struct se_cmd *se_cmd = &cmd->se_cmd;
3077
3078         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3079             "qla_target(%d): terminating exchange for aborted cmd=%p "
3080             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3081             se_cmd->tag);
3082
3083         cmd->state = QLA_TGT_STATE_ABORTED;
3084         cmd->cmd_flags |= BIT_6;
3085
3086         qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
3087 }
3088 EXPORT_SYMBOL(qlt_abort_cmd);
3089
3090 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3091 {
3092         struct qla_tgt_sess *sess = cmd->sess;
3093
3094         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3095             "%s: se_cmd[%p] ox_id %04x\n",
3096             __func__, &cmd->se_cmd,
3097             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3098
3099         BUG_ON(cmd->cmd_in_wq);
3100
3101         if (!cmd->q_full)
3102                 qlt_decr_num_pend_cmds(cmd->vha);
3103
3104         BUG_ON(cmd->sg_mapped);
3105         cmd->jiffies_at_free = get_jiffies_64();
3106         if (unlikely(cmd->free_sg))
3107                 kfree(cmd->sg);
3108
3109         if (!sess || !sess->se_sess) {
3110                 WARN_ON(1);
3111                 return;
3112         }
3113         cmd->jiffies_at_free = get_jiffies_64();
3114         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3115 }
3116 EXPORT_SYMBOL(qlt_free_cmd);
3117
3118 /* ha->hardware_lock supposed to be held on entry */
3119 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
3120         struct qla_tgt_cmd *cmd, void *ctio)
3121 {
3122         struct qla_tgt_srr_ctio *sc;
3123         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3124         struct qla_tgt_srr_imm *imm;
3125
3126         tgt->ctio_srr_id++;
3127         cmd->cmd_flags |= BIT_15;
3128
3129         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
3130             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
3131
3132         if (!ctio) {
3133                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
3134                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
3135                     vha->vp_idx);
3136                 return -EINVAL;
3137         }
3138
3139         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
3140         if (sc != NULL) {
3141                 sc->cmd = cmd;
3142                 /* IRQ is already OFF */
3143                 spin_lock(&tgt->srr_lock);
3144                 sc->srr_id = tgt->ctio_srr_id;
3145                 list_add_tail(&sc->srr_list_entry,
3146                     &tgt->srr_ctio_list);
3147                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
3148                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
3149                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3150                         int found = 0;
3151                         list_for_each_entry(imm, &tgt->srr_imm_list,
3152                             srr_list_entry) {
3153                                 if (imm->srr_id == sc->srr_id) {
3154                                         found = 1;
3155                                         break;
3156                                 }
3157                         }
3158                         if (found) {
3159                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
3160                                     "Scheduling srr work\n");
3161                                 schedule_work(&tgt->srr_work);
3162                         } else {
3163                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
3164                                     "qla_target(%d): imm_srr_id "
3165                                     "== ctio_srr_id (%d), but there is no "
3166                                     "corresponding SRR IMM, deleting CTIO "
3167                                     "SRR %p\n", vha->vp_idx,
3168                                     tgt->ctio_srr_id, sc);
3169                                 list_del(&sc->srr_list_entry);
3170                                 spin_unlock(&tgt->srr_lock);
3171
3172                                 kfree(sc);
3173                                 return -EINVAL;
3174                         }
3175                 }
3176                 spin_unlock(&tgt->srr_lock);
3177         } else {
3178                 struct qla_tgt_srr_imm *ti;
3179
3180                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
3181                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
3182                     vha->vp_idx);
3183                 spin_lock(&tgt->srr_lock);
3184                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
3185                     srr_list_entry) {
3186                         if (imm->srr_id == tgt->ctio_srr_id) {
3187                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
3188                                     "IMM SRR %p deleted (id %d)\n",
3189                                     imm, imm->srr_id);
3190                                 list_del(&imm->srr_list_entry);
3191                                 qlt_reject_free_srr_imm(vha, imm, 1);
3192                         }
3193                 }
3194                 spin_unlock(&tgt->srr_lock);
3195
3196                 return -ENOMEM;
3197         }
3198
3199         return 0;
3200 }
3201
3202 /*
3203  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3204  */
3205 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3206         struct qla_tgt_cmd *cmd, uint32_t status)
3207 {
3208         int term = 0;
3209
3210         if (ctio != NULL) {
3211                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3212                 term = !(c->flags &
3213                     cpu_to_le16(OF_TERM_EXCH));
3214         } else
3215                 term = 1;
3216
3217         if (term)
3218                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3219
3220         return term;
3221 }
3222
3223 /* ha->hardware_lock supposed to be held on entry */
3224 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3225         uint32_t handle)
3226 {
3227         struct qla_hw_data *ha = vha->hw;
3228
3229         handle--;
3230         if (ha->tgt.cmds[handle] != NULL) {
3231                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3232                 ha->tgt.cmds[handle] = NULL;
3233                 return cmd;
3234         } else
3235                 return NULL;
3236 }
3237
3238 /* ha->hardware_lock supposed to be held on entry */
3239 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3240         uint32_t handle, void *ctio)
3241 {
3242         struct qla_tgt_cmd *cmd = NULL;
3243
3244         /* Clear out internal marks */
3245         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3246             CTIO_INTERMEDIATE_HANDLE_MARK);
3247
3248         if (handle != QLA_TGT_NULL_HANDLE) {
3249                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3250                         return NULL;
3251
3252                 /* handle-1 is actually used */
3253                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3254                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3255                             "qla_target(%d): Wrong handle %x received\n",
3256                             vha->vp_idx, handle);
3257                         return NULL;
3258                 }
3259                 cmd = qlt_get_cmd(vha, handle);
3260                 if (unlikely(cmd == NULL)) {
3261                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
3262                             "qla_target(%d): Suspicious: unable to "
3263                             "find the command with handle %x\n", vha->vp_idx,
3264                             handle);
3265                         return NULL;
3266                 }
3267         } else if (ctio != NULL) {
3268                 /* We can't get loop ID from CTIO7 */
3269                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3270                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3271                     "support NULL handles\n", vha->vp_idx);
3272                 return NULL;
3273         }
3274
3275         return cmd;
3276 }
3277
3278 /* hardware_lock should be held by caller. */
3279 static void
3280 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3281 {
3282         struct qla_hw_data *ha = vha->hw;
3283         uint32_t handle;
3284
3285         if (cmd->sg_mapped)
3286                 qlt_unmap_sg(vha, cmd);
3287
3288         handle = qlt_make_handle(vha);
3289
3290         /* TODO: fix debug message type and ids. */
3291         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3292                 ql_dbg(ql_dbg_io, vha, 0xff00,
3293                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3294         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3295                 cmd->write_data_transferred = 0;
3296                 cmd->state = QLA_TGT_STATE_DATA_IN;
3297
3298                 ql_dbg(ql_dbg_io, vha, 0xff01,
3299                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3300
3301                 ha->tgt.tgt_ops->handle_data(cmd);
3302                 return;
3303         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3304                 ql_dbg(ql_dbg_io, vha, 0xff02,
3305                     "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3306         } else {
3307                 ql_dbg(ql_dbg_io, vha, 0xff03,
3308                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3309                     cmd->state);
3310                 dump_stack();
3311         }
3312
3313         cmd->cmd_flags |= BIT_17;
3314         ha->tgt.tgt_ops->free_cmd(cmd);
3315 }
3316
3317 void
3318 qlt_host_reset_handler(struct qla_hw_data *ha)
3319 {
3320         struct qla_tgt_cmd *cmd;
3321         unsigned long flags;
3322         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3323         scsi_qla_host_t *vha = NULL;
3324         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3325         uint32_t i;
3326
3327         if (!base_vha->hw->tgt.tgt_ops)
3328                 return;
3329
3330         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3331                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3332                         "Target mode disabled\n");
3333                 return;
3334         }
3335
3336         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3337             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3338             base_vha->dpc_flags);
3339
3340         spin_lock_irqsave(&ha->hardware_lock, flags);
3341         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3342                 cmd = qlt_get_cmd(base_vha, i);
3343                 if (!cmd)
3344                         continue;
3345                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3346                 vha = cmd->vha;
3347                 qlt_abort_cmd_on_host_reset(vha, cmd);
3348         }
3349         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3350 }
3351
3352
3353 /*
3354  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3355  */
3356 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3357         uint32_t status, void *ctio)
3358 {
3359         struct qla_hw_data *ha = vha->hw;
3360         struct se_cmd *se_cmd;
3361         struct qla_tgt_cmd *cmd;
3362
3363         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3364                 /* That could happen only in case of an error/reset/abort */
3365                 if (status != CTIO_SUCCESS) {
3366                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3367                             "Intermediate CTIO received"
3368                             " (status %x)\n", status);
3369                 }
3370                 return;
3371         }
3372
3373         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3374         if (cmd == NULL)
3375                 return;
3376
3377         se_cmd = &cmd->se_cmd;
3378         cmd->cmd_sent_to_fw = 0;
3379
3380         qlt_unmap_sg(vha, cmd);
3381
3382         if (unlikely(status != CTIO_SUCCESS)) {
3383                 switch (status & 0xFFFF) {
3384                 case CTIO_LIP_RESET:
3385                 case CTIO_TARGET_RESET:
3386                 case CTIO_ABORTED:
3387                         /* driver request abort via Terminate exchange */
3388                 case CTIO_TIMEOUT:
3389                 case CTIO_INVALID_RX_ID:
3390                         /* They are OK */
3391                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3392                             "qla_target(%d): CTIO with "
3393                             "status %#x received, state %x, se_cmd %p, "
3394                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3395                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3396                             status, cmd->state, se_cmd);
3397                         break;
3398
3399                 case CTIO_PORT_LOGGED_OUT:
3400                 case CTIO_PORT_UNAVAILABLE:
3401                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3402                             "qla_target(%d): CTIO with PORT LOGGED "
3403                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
3404                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3405                             status, cmd->state, se_cmd);
3406                         break;
3407
3408                 case CTIO_SRR_RECEIVED:
3409                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3410                             "qla_target(%d): CTIO with SRR_RECEIVED"
3411                             " status %x received (state %x, se_cmd %p)\n",
3412                             vha->vp_idx, status, cmd->state, se_cmd);
3413                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3414                                 break;
3415                         else
3416                                 return;
3417
3418                 case CTIO_DIF_ERROR: {
3419                         struct ctio_crc_from_fw *crc =
3420                                 (struct ctio_crc_from_fw *)ctio;
3421                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3422                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3423                             vha->vp_idx, status, cmd->state, se_cmd,
3424                             *((u64 *)&crc->actual_dif[0]),
3425                             *((u64 *)&crc->expected_dif[0]));
3426
3427                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3428                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3429                                         /* scsi Write/xfer rdy complete */
3430                                         goto skip_term;
3431                                 } else {
3432                                         /* scsi read/xmit respond complete
3433                                          * call handle dif to send scsi status
3434                                          * rather than terminate exchange.
3435                                          */
3436                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3437                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3438                                         return;
3439                                 }
3440                         } else {
3441                                 /* Need to generate a SCSI good completion.
3442                                  * because FW did not send scsi status.
3443                                  */
3444                                 status = 0;
3445                                 goto skip_term;
3446                         }
3447                         break;
3448                 }
3449                 default:
3450                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3451                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3452                             vha->vp_idx, status, cmd->state, se_cmd);
3453                         break;
3454                 }
3455
3456
3457                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3458                  * cmd is already aborted/terminated, we don't
3459                  * need to terminate again.  The exchange is already
3460                  * cleaned up/freed at FW level.  Just cleanup at driver
3461                  * level.
3462                  */
3463                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3464                     (cmd->state != QLA_TGT_STATE_ABORTED)) {
3465                         cmd->cmd_flags |= BIT_13;
3466                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3467                                 return;
3468                 }
3469         }
3470 skip_term:
3471
3472         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3473                 cmd->cmd_flags |= BIT_12;
3474         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3475                 cmd->state = QLA_TGT_STATE_DATA_IN;
3476
3477                 if (status == CTIO_SUCCESS)
3478                         cmd->write_data_transferred = 1;
3479
3480                 ha->tgt.tgt_ops->handle_data(cmd);
3481                 return;
3482         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3483                 cmd->cmd_flags |= BIT_18;
3484                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3485                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3486         } else {
3487                 cmd->cmd_flags |= BIT_19;
3488                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3489                     "qla_target(%d): A command in state (%d) should "
3490                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3491         }
3492
3493         if (unlikely(status != CTIO_SUCCESS) &&
3494                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3495                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3496                 dump_stack();
3497         }
3498
3499         ha->tgt.tgt_ops->free_cmd(cmd);
3500 }
3501
3502 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3503         uint8_t task_codes)
3504 {
3505         int fcp_task_attr;
3506
3507         switch (task_codes) {
3508         case ATIO_SIMPLE_QUEUE:
3509                 fcp_task_attr = TCM_SIMPLE_TAG;
3510                 break;
3511         case ATIO_HEAD_OF_QUEUE:
3512                 fcp_task_attr = TCM_HEAD_TAG;
3513                 break;
3514         case ATIO_ORDERED_QUEUE:
3515                 fcp_task_attr = TCM_ORDERED_TAG;
3516                 break;
3517         case ATIO_ACA_QUEUE:
3518                 fcp_task_attr = TCM_ACA_TAG;
3519                 break;
3520         case ATIO_UNTAGGED:
3521                 fcp_task_attr = TCM_SIMPLE_TAG;
3522                 break;
3523         default:
3524                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3525                     "qla_target: unknown task code %x, use ORDERED instead\n",
3526                     task_codes);
3527                 fcp_task_attr = TCM_ORDERED_TAG;
3528                 break;
3529         }
3530
3531         return fcp_task_attr;
3532 }
3533
3534 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3535                                         uint8_t *);
3536 /*
3537  * Process context for I/O path into tcm_qla2xxx code
3538  */
3539 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3540 {
3541         scsi_qla_host_t *vha = cmd->vha;
3542         struct qla_hw_data *ha = vha->hw;
3543         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3544         struct qla_tgt_sess *sess = cmd->sess;
3545         struct atio_from_isp *atio = &cmd->atio;
3546         unsigned char *cdb;
3547         unsigned long flags;
3548         uint32_t data_length;
3549         int ret, fcp_task_attr, data_dir, bidi = 0;
3550
3551         cmd->cmd_in_wq = 0;
3552         cmd->cmd_flags |= BIT_1;
3553         if (tgt->tgt_stop)
3554                 goto out_term;
3555
3556         if (cmd->state == QLA_TGT_STATE_ABORTED) {
3557                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3558                     "cmd with tag %u is aborted\n",
3559                     cmd->atio.u.isp24.exchange_addr);
3560                 goto out_term;
3561         }
3562
3563         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3564         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3565         cmd->unpacked_lun = scsilun_to_int(
3566             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3567
3568         if (atio->u.isp24.fcp_cmnd.rddata &&
3569             atio->u.isp24.fcp_cmnd.wrdata) {
3570                 bidi = 1;
3571                 data_dir = DMA_TO_DEVICE;
3572         } else if (atio->u.isp24.fcp_cmnd.rddata)
3573                 data_dir = DMA_FROM_DEVICE;
3574         else if (atio->u.isp24.fcp_cmnd.wrdata)
3575                 data_dir = DMA_TO_DEVICE;
3576         else
3577                 data_dir = DMA_NONE;
3578
3579         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3580             atio->u.isp24.fcp_cmnd.task_attr);
3581         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3582             &atio->u.isp24.fcp_cmnd.add_cdb[
3583             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3584
3585         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3586                                           fcp_task_attr, data_dir, bidi);
3587         if (ret != 0)
3588                 goto out_term;
3589         /*
3590          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3591          */
3592         spin_lock_irqsave(&ha->hardware_lock, flags);
3593         ha->tgt.tgt_ops->put_sess(sess);
3594         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3595         return;
3596
3597 out_term:
3598         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3599         /*
3600          * cmd has not sent to target yet, so pass NULL as the second
3601          * argument to qlt_send_term_exchange() and free the memory here.
3602          */
3603         cmd->cmd_flags |= BIT_2;
3604         spin_lock_irqsave(&ha->hardware_lock, flags);
3605         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3606
3607         qlt_decr_num_pend_cmds(vha);
3608         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3609         ha->tgt.tgt_ops->put_sess(sess);
3610         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3611 }
3612
3613 static void qlt_do_work(struct work_struct *work)
3614 {
3615         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3616         scsi_qla_host_t *vha = cmd->vha;
3617         unsigned long flags;
3618
3619         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3620         list_del(&cmd->cmd_list);
3621         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3622
3623         __qlt_do_work(cmd);
3624 }
3625
3626 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3627                                        struct qla_tgt_sess *sess,
3628                                        struct atio_from_isp *atio)
3629 {
3630         struct se_session *se_sess = sess->se_sess;
3631         struct qla_tgt_cmd *cmd;
3632         int tag;
3633
3634         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3635         if (tag < 0)
3636                 return NULL;
3637
3638         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3639         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3640
3641         memcpy(&cmd->atio, atio, sizeof(*atio));
3642         cmd->state = QLA_TGT_STATE_NEW;
3643         cmd->tgt = vha->vha_tgt.qla_tgt;
3644         qlt_incr_num_pend_cmds(vha);
3645         cmd->vha = vha;
3646         cmd->se_cmd.map_tag = tag;
3647         cmd->sess = sess;
3648         cmd->loop_id = sess->loop_id;
3649         cmd->conf_compl_supported = sess->conf_compl_supported;
3650
3651         cmd->cmd_flags = 0;
3652         cmd->jiffies_at_alloc = get_jiffies_64();
3653
3654         cmd->reset_count = vha->hw->chip_reset;
3655
3656         return cmd;
3657 }
3658
3659 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3660                           uint16_t);
3661
3662 static void qlt_create_sess_from_atio(struct work_struct *work)
3663 {
3664         struct qla_tgt_sess_op *op = container_of(work,
3665                                         struct qla_tgt_sess_op, work);
3666         scsi_qla_host_t *vha = op->vha;
3667         struct qla_hw_data *ha = vha->hw;
3668         struct qla_tgt_sess *sess;
3669         struct qla_tgt_cmd *cmd;
3670         unsigned long flags;
3671         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3672
3673         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3674         list_del(&op->cmd_list);
3675         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3676
3677         if (op->aborted) {
3678                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3679                     "sess_op with tag %u is aborted\n",
3680                     op->atio.u.isp24.exchange_addr);
3681                 goto out_term;
3682         }
3683
3684         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3685             "qla_target(%d): Unable to find wwn login"
3686             " (s_id %x:%x:%x), trying to create it manually\n",
3687             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3688
3689         if (op->atio.u.raw.entry_count > 1) {
3690                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3691                     "Dropping multy entry atio %p\n", &op->atio);
3692                 goto out_term;
3693         }
3694
3695         mutex_lock(&vha->vha_tgt.tgt_mutex);
3696         sess = qlt_make_local_sess(vha, s_id);
3697         /* sess has an extra creation ref. */
3698         mutex_unlock(&vha->vha_tgt.tgt_mutex);
3699
3700         if (!sess)
3701                 goto out_term;
3702         /*
3703          * Now obtain a pre-allocated session tag using the original op->atio
3704          * packet header, and dispatch into __qlt_do_work() using the existing
3705          * process context.
3706          */
3707         cmd = qlt_get_tag(vha, sess, &op->atio);
3708         if (!cmd) {
3709                 spin_lock_irqsave(&ha->hardware_lock, flags);
3710                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3711                 ha->tgt.tgt_ops->put_sess(sess);
3712                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3713                 kfree(op);
3714                 return;
3715         }
3716         /*
3717          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3718          * the extra reference taken above by qlt_make_local_sess()
3719          */
3720         __qlt_do_work(cmd);
3721         kfree(op);
3722         return;
3723
3724 out_term:
3725         spin_lock_irqsave(&ha->hardware_lock, flags);
3726         qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3727         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3728         kfree(op);
3729
3730 }
3731
3732 /* ha->hardware_lock supposed to be held on entry */
3733 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3734         struct atio_from_isp *atio)
3735 {
3736         struct qla_hw_data *ha = vha->hw;
3737         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3738         struct qla_tgt_sess *sess;
3739         struct qla_tgt_cmd *cmd;
3740
3741         if (unlikely(tgt->tgt_stop)) {
3742                 ql_dbg(ql_dbg_io, vha, 0x3061,
3743                     "New command while device %p is shutting down\n", tgt);
3744                 return -EFAULT;
3745         }
3746
3747         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3748         if (unlikely(!sess)) {
3749                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3750                                                      GFP_ATOMIC);
3751                 if (!op)
3752                         return -ENOMEM;
3753
3754                 memcpy(&op->atio, atio, sizeof(*atio));
3755                 op->vha = vha;
3756
3757                 spin_lock(&vha->cmd_list_lock);
3758                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3759                 spin_unlock(&vha->cmd_list_lock);
3760
3761                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3762                 queue_work(qla_tgt_wq, &op->work);
3763                 return 0;
3764         }
3765
3766         /* Another WWN used to have our s_id. Our PLOGI scheduled its
3767          * session deletion, but it's still in sess_del_work wq */
3768         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
3769                 ql_dbg(ql_dbg_io, vha, 0x3061,
3770                     "New command while old session %p is being deleted\n",
3771                     sess);
3772                 return -EFAULT;
3773         }
3774
3775         /*
3776          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3777          */
3778         kref_get(&sess->se_sess->sess_kref);
3779
3780         cmd = qlt_get_tag(vha, sess, atio);
3781         if (!cmd) {
3782                 ql_dbg(ql_dbg_io, vha, 0x3062,
3783                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3784                 ha->tgt.tgt_ops->put_sess(sess);
3785                 return -ENOMEM;
3786         }
3787
3788         cmd->cmd_in_wq = 1;
3789         cmd->cmd_flags |= BIT_0;
3790
3791         spin_lock(&vha->cmd_list_lock);
3792         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
3793         spin_unlock(&vha->cmd_list_lock);
3794
3795         INIT_WORK(&cmd->work, qlt_do_work);
3796         queue_work(qla_tgt_wq, &cmd->work);
3797         return 0;
3798
3799 }
3800
3801 /* ha->hardware_lock supposed to be held on entry */
3802 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3803         int fn, void *iocb, int flags)
3804 {
3805         struct scsi_qla_host *vha = sess->vha;
3806         struct qla_hw_data *ha = vha->hw;
3807         struct qla_tgt_mgmt_cmd *mcmd;
3808         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3809         int res;
3810         uint8_t tmr_func;
3811
3812         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3813         if (!mcmd) {
3814                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3815                     "qla_target(%d): Allocation of management "
3816                     "command failed, some commands and their data could "
3817                     "leak\n", vha->vp_idx);
3818                 return -ENOMEM;
3819         }
3820         memset(mcmd, 0, sizeof(*mcmd));
3821         mcmd->sess = sess;
3822
3823         if (iocb) {
3824                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3825                     sizeof(mcmd->orig_iocb.imm_ntfy));
3826         }
3827         mcmd->tmr_func = fn;
3828         mcmd->flags = flags;
3829         mcmd->reset_count = vha->hw->chip_reset;
3830
3831         switch (fn) {
3832         case QLA_TGT_CLEAR_ACA:
3833                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3834                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3835                 tmr_func = TMR_CLEAR_ACA;
3836                 break;
3837
3838         case QLA_TGT_TARGET_RESET:
3839                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3840                     "qla_target(%d): TARGET_RESET received\n",
3841                     sess->vha->vp_idx);
3842                 tmr_func = TMR_TARGET_WARM_RESET;
3843                 break;
3844
3845         case QLA_TGT_LUN_RESET:
3846                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3847                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3848                 tmr_func = TMR_LUN_RESET;
3849                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
3850                 break;
3851
3852         case QLA_TGT_CLEAR_TS:
3853                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3854                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3855                 tmr_func = TMR_CLEAR_TASK_SET;
3856                 break;
3857
3858         case QLA_TGT_ABORT_TS:
3859                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3860                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3861                 tmr_func = TMR_ABORT_TASK_SET;
3862                 break;
3863 #if 0
3864         case QLA_TGT_ABORT_ALL:
3865                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3866                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3867                     sess->vha->vp_idx);
3868                 tmr_func = 0;
3869                 break;
3870
3871         case QLA_TGT_ABORT_ALL_SESS:
3872                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3873                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3874                     sess->vha->vp_idx);
3875                 tmr_func = 0;
3876                 break;
3877
3878         case QLA_TGT_NEXUS_LOSS_SESS:
3879                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3880                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3881                     sess->vha->vp_idx);
3882                 tmr_func = 0;
3883                 break;
3884
3885         case QLA_TGT_NEXUS_LOSS:
3886                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3887                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3888                 tmr_func = 0;
3889                 break;
3890 #endif
3891         default:
3892                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3893                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3894                     sess->vha->vp_idx, fn);
3895                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3896                 return -ENOSYS;
3897         }
3898
3899         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3900         if (res != 0) {
3901                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3902                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3903                     sess->vha->vp_idx, res);
3904                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3905                 return -EFAULT;
3906         }
3907
3908         return 0;
3909 }
3910
3911 /* ha->hardware_lock supposed to be held on entry */
3912 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3913 {
3914         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3915         struct qla_hw_data *ha = vha->hw;
3916         struct qla_tgt *tgt;
3917         struct qla_tgt_sess *sess;
3918         uint32_t lun, unpacked_lun;
3919         int fn;
3920
3921         tgt = vha->vha_tgt.qla_tgt;
3922
3923         lun = a->u.isp24.fcp_cmnd.lun;
3924         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3925         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3926             a->u.isp24.fcp_hdr.s_id);
3927         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3928
3929         if (!sess) {
3930                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3931                     "qla_target(%d): task mgmt fn 0x%x for "
3932                     "non-existant session\n", vha->vp_idx, fn);
3933                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3934                     sizeof(struct atio_from_isp));
3935         }
3936
3937         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
3938                 return -EFAULT;
3939
3940         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3941 }
3942
3943 /* ha->hardware_lock supposed to be held on entry */
3944 static int __qlt_abort_task(struct scsi_qla_host *vha,
3945         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3946 {
3947         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3948         struct qla_hw_data *ha = vha->hw;
3949         struct qla_tgt_mgmt_cmd *mcmd;
3950         uint32_t lun, unpacked_lun;
3951         int rc;
3952
3953         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3954         if (mcmd == NULL) {
3955                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3956                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3957                     vha->vp_idx, __func__);
3958                 return -ENOMEM;
3959         }
3960         memset(mcmd, 0, sizeof(*mcmd));
3961
3962         mcmd->sess = sess;
3963         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3964             sizeof(mcmd->orig_iocb.imm_ntfy));
3965
3966         lun = a->u.isp24.fcp_cmnd.lun;
3967         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3968         mcmd->reset_count = vha->hw->chip_reset;
3969
3970         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3971             le16_to_cpu(iocb->u.isp2x.seq_id));
3972         if (rc != 0) {
3973                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3974                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3975                     vha->vp_idx, rc);
3976                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3977                 return -EFAULT;
3978         }
3979
3980         return 0;
3981 }
3982
3983 /* ha->hardware_lock supposed to be held on entry */
3984 static int qlt_abort_task(struct scsi_qla_host *vha,
3985         struct imm_ntfy_from_isp *iocb)
3986 {
3987         struct qla_hw_data *ha = vha->hw;
3988         struct qla_tgt_sess *sess;
3989         int loop_id;
3990
3991         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3992
3993         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3994         if (sess == NULL) {
3995                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3996                     "qla_target(%d): task abort for unexisting "
3997                     "session\n", vha->vp_idx);
3998                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3999                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4000         }
4001
4002         return __qlt_abort_task(vha, iocb, sess);
4003 }
4004
4005 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4006 {
4007         if (fcport->tgt_session) {
4008                 if (rc != MBS_COMMAND_COMPLETE) {
4009                         ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4010                                 "%s: se_sess %p / sess %p from"
4011                                 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4012                                 " LOGO failed: %#x\n",
4013                                 __func__,
4014                                 fcport->tgt_session->se_sess,
4015                                 fcport->tgt_session,
4016                                 fcport->port_name, fcport->loop_id,
4017                                 fcport->d_id.b.domain, fcport->d_id.b.area,
4018                                 fcport->d_id.b.al_pa, rc);
4019                 }
4020
4021                 fcport->tgt_session->logout_completed = 1;
4022         }
4023 }
4024
4025 static void qlt_swap_imm_ntfy_iocb(struct imm_ntfy_from_isp *a,
4026     struct imm_ntfy_from_isp *b)
4027 {
4028         struct imm_ntfy_from_isp tmp;
4029         memcpy(&tmp, a, sizeof(struct imm_ntfy_from_isp));
4030         memcpy(a, b, sizeof(struct imm_ntfy_from_isp));
4031         memcpy(b, &tmp, sizeof(struct imm_ntfy_from_isp));
4032 }
4033
4034 /*
4035 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4036 *
4037 * Schedules sessions with matching port_id/loop_id but different wwn for
4038 * deletion. Returns existing session with matching wwn if present.
4039 * Null otherwise.
4040 */
4041 static struct qla_tgt_sess *
4042 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4043     port_id_t port_id, uint16_t loop_id)
4044 {
4045         struct qla_tgt_sess *sess = NULL, *other_sess;
4046         uint64_t other_wwn;
4047
4048         list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4049
4050                 other_wwn = wwn_to_u64(other_sess->port_name);
4051
4052                 if (wwn == other_wwn) {
4053                         WARN_ON(sess);
4054                         sess = other_sess;
4055                         continue;
4056                 }
4057
4058                 /* find other sess with nport_id collision */
4059                 if (port_id.b24 == other_sess->s_id.b24) {
4060                         if (loop_id != other_sess->loop_id) {
4061                                 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4062                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4063                                     other_sess, other_sess->loop_id, other_wwn);
4064
4065                                 /*
4066                                  * logout_on_delete is set by default, but another
4067                                  * session that has the same s_id/loop_id combo
4068                                  * might have cleared it when requested this session
4069                                  * deletion, so don't touch it
4070                                  */
4071                                 qlt_schedule_sess_for_deletion(other_sess, true);
4072                         } else {
4073                                 /*
4074                                  * Another wwn used to have our s_id/loop_id
4075                                  * combo - kill the session, but don't log out
4076                                  */
4077                                 sess->logout_on_delete = 0;
4078                                 qlt_schedule_sess_for_deletion(other_sess,
4079                                     true);
4080                         }
4081                         continue;
4082                 }
4083
4084                 /* find other sess with nport handle collision */
4085                 if (loop_id == other_sess->loop_id) {
4086                         ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4087                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4088                                other_sess, other_sess->loop_id, other_wwn);
4089
4090                         /* Same loop_id but different s_id
4091                          * Ok to kill and logout */
4092                         qlt_schedule_sess_for_deletion(other_sess, true);
4093                 }
4094         }
4095
4096         return sess;
4097 }
4098
4099 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4100 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4101 {
4102         struct qla_tgt_sess_op *op;
4103         struct qla_tgt_cmd *cmd;
4104         uint32_t key;
4105         int count = 0;
4106
4107         key = (((u32)s_id->b.domain << 16) |
4108                ((u32)s_id->b.area   <<  8) |
4109                ((u32)s_id->b.al_pa));
4110
4111         spin_lock(&vha->cmd_list_lock);
4112         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4113                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4114                 if (op_key == key) {
4115                         op->aborted = true;
4116                         count++;
4117                 }
4118         }
4119         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4120                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4121                 if (cmd_key == key) {
4122                         cmd->state = QLA_TGT_STATE_ABORTED;
4123                         count++;
4124                 }
4125         }
4126         spin_unlock(&vha->cmd_list_lock);
4127
4128         return count;
4129 }
4130
4131 /*
4132  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4133  */
4134 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4135         struct imm_ntfy_from_isp *iocb)
4136 {
4137         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4138         struct qla_hw_data *ha = vha->hw;
4139         struct qla_tgt_sess *sess = NULL;
4140         uint64_t wwn;
4141         port_id_t port_id;
4142         uint16_t loop_id;
4143         uint16_t wd3_lo;
4144         int res = 0;
4145
4146         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4147
4148         port_id.b.domain = iocb->u.isp24.port_id[2];
4149         port_id.b.area   = iocb->u.isp24.port_id[1];
4150         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4151         port_id.b.rsvd_1 = 0;
4152
4153         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4154
4155         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4156             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4157             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4158
4159         /* res = 1 means ack at the end of thread
4160          * res = 0 means ack async/later.
4161          */
4162         switch (iocb->u.isp24.status_subcode) {
4163         case ELS_PLOGI:
4164
4165                 /* Mark all stale commands in qla_tgt_wq for deletion */
4166                 abort_cmds_for_s_id(vha, &port_id);
4167
4168                 if (wwn)
4169                         sess = qlt_find_sess_invalidate_other(tgt, wwn,
4170                             port_id, loop_id);
4171
4172                 if (!sess || IS_SW_RESV_ADDR(sess->s_id)) {
4173                         res = 1;
4174                         break;
4175                 }
4176
4177                 if (sess->plogi_ack_needed) {
4178                         /*
4179                          * Initiator sent another PLOGI before last PLOGI could
4180                          * finish. Swap plogi iocbs and terminate old one
4181                          * without acking, new one will get acked when session
4182                          * deletion completes.
4183                          */
4184                         ql_log(ql_log_warn, sess->vha, 0xf094,
4185                             "sess %p received double plogi.\n", sess);
4186
4187                         qlt_swap_imm_ntfy_iocb(iocb, &sess->tm_iocb);
4188
4189                         qlt_send_term_imm_notif(vha, iocb, 1);
4190
4191                         res = 0;
4192                         break;
4193                 }
4194
4195                 res = 0;
4196
4197                 /*
4198                  * Save immediate Notif IOCB for Ack when sess is done
4199                  * and being deleted.
4200                  */
4201                 memcpy(&sess->tm_iocb, iocb, sizeof(sess->tm_iocb));
4202                 sess->plogi_ack_needed  = 1;
4203
4204                  /*
4205                   * Under normal circumstances we want to release nport handle
4206                   * during LOGO process to avoid nport handle leaks inside FW.
4207                   * The exception is when LOGO is done while another PLOGI with
4208                   * the same nport handle is waiting as might be the case here.
4209                   * Note: there is always a possibily of a race where session
4210                   * deletion has already started for other reasons (e.g. ACL
4211                   * removal) and now PLOGI arrives:
4212                   * 1. if PLOGI arrived in FW after nport handle has been freed,
4213                   *    FW must have assigned this PLOGI a new/same handle and we
4214                   *    can proceed ACK'ing it as usual when session deletion
4215                   *    completes.
4216                   * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4217                   *    bit reached it, the handle has now been released. We'll
4218                   *    get an error when we ACK this PLOGI. Nothing will be sent
4219                   *    back to initiator. Initiator should eventually retry
4220                   *    PLOGI and situation will correct itself.
4221                   */
4222                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4223                                            (sess->s_id.b24 == port_id.b24));
4224                 qlt_schedule_sess_for_deletion(sess, true);
4225                 break;
4226
4227         case ELS_PRLI:
4228                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4229
4230                 if (wwn)
4231                         sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4232                             loop_id);
4233
4234                 if (sess != NULL) {
4235                         if (sess->deleted) {
4236                                 /*
4237                                  * Impatient initiator sent PRLI before last
4238                                  * PLOGI could finish. Will force him to re-try,
4239                                  * while last one finishes.
4240                                  */
4241                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4242                                     "sess %p PRLI received, before plogi ack.\n",
4243                                     sess);
4244                                 qlt_send_term_imm_notif(vha, iocb, 1);
4245                                 res = 0;
4246                                 break;
4247                         }
4248
4249                         /*
4250                          * This shouldn't happen under normal circumstances,
4251                          * since we have deleted the old session during PLOGI
4252                          */
4253                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4254                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4255                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4256
4257                         sess->local = 0;
4258                         sess->loop_id = loop_id;
4259                         sess->s_id = port_id;
4260
4261                         if (wd3_lo & BIT_7)
4262                                 sess->conf_compl_supported = 1;
4263
4264                 }
4265                 res = 1; /* send notify ack */
4266
4267                 /* Make session global (not used in fabric mode) */
4268                 if (ha->current_topology != ISP_CFG_F) {
4269                         set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4270                         set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4271                         qla2xxx_wake_dpc(vha);
4272                 } else {
4273                         /* todo: else - create sess here. */
4274                         res = 1; /* send notify ack */
4275                 }
4276
4277                 break;
4278
4279         case ELS_LOGO:
4280         case ELS_PRLO:
4281                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4282                 break;
4283         case ELS_PDISC:
4284         case ELS_ADISC:
4285         {
4286                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4287                 if (tgt->link_reinit_iocb_pending) {
4288                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4289                             0, 0, 0, 0, 0, 0);
4290                         tgt->link_reinit_iocb_pending = 0;
4291                 }
4292                 res = 1; /* send notify ack */
4293                 break;
4294         }
4295
4296         case ELS_FLOGI: /* should never happen */
4297         default:
4298                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4299                     "qla_target(%d): Unsupported ELS command %x "
4300                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4301                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4302                 break;
4303         }
4304
4305         return res;
4306 }
4307
4308 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4309 {
4310 #if 1
4311         /*
4312          * FIXME: Reject non zero SRR relative offset until we can test
4313          * this code properly.
4314          */
4315         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4316         return -1;
4317 #else
4318         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4319         size_t first_offset = 0, rem_offset = offset, tmp = 0;
4320         int i, sg_srr_cnt, bufflen = 0;
4321
4322         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4323             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4324             "cmd->sg_cnt: %u, direction: %d\n",
4325             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4326
4327         if (!cmd->sg || !cmd->sg_cnt) {
4328                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4329                     "Missing cmd->sg or zero cmd->sg_cnt in"
4330                     " qla_tgt_set_data_offset\n");
4331                 return -EINVAL;
4332         }
4333         /*
4334          * Walk the current cmd->sg list until we locate the new sg_srr_start
4335          */
4336         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4337                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4338                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4339                     i, sg, sg_page(sg), sg->length, sg->offset);
4340
4341                 if ((sg->length + tmp) > offset) {
4342                         first_offset = rem_offset;
4343                         sg_srr_start = sg;
4344                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4345                             "Found matching sg[%d], using %p as sg_srr_start, "
4346                             "and using first_offset: %zu\n", i, sg,
4347                             first_offset);
4348                         break;
4349                 }
4350                 tmp += sg->length;
4351                 rem_offset -= sg->length;
4352         }
4353
4354         if (!sg_srr_start) {
4355                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4356                     "Unable to locate sg_srr_start for offset: %u\n", offset);
4357                 return -EINVAL;
4358         }
4359         sg_srr_cnt = (cmd->sg_cnt - i);
4360
4361         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4362         if (!sg_srr) {
4363                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4364                     "Unable to allocate sgp\n");
4365                 return -ENOMEM;
4366         }
4367         sg_init_table(sg_srr, sg_srr_cnt);
4368         sgp = &sg_srr[0];
4369         /*
4370          * Walk the remaining list for sg_srr_start, mapping to the newly
4371          * allocated sg_srr taking first_offset into account.
4372          */
4373         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4374                 if (first_offset) {
4375                         sg_set_page(sgp, sg_page(sg),
4376                             (sg->length - first_offset), first_offset);
4377                         first_offset = 0;
4378                 } else {
4379                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
4380                 }
4381                 bufflen += sgp->length;
4382
4383                 sgp = sg_next(sgp);
4384                 if (!sgp)
4385                         break;
4386         }
4387
4388         cmd->sg = sg_srr;
4389         cmd->sg_cnt = sg_srr_cnt;
4390         cmd->bufflen = bufflen;
4391         cmd->offset += offset;
4392         cmd->free_sg = 1;
4393
4394         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4395         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4396             cmd->sg_cnt);
4397         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4398             cmd->bufflen);
4399         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4400             cmd->offset);
4401
4402         if (cmd->sg_cnt < 0)
4403                 BUG();
4404
4405         if (cmd->bufflen < 0)
4406                 BUG();
4407
4408         return 0;
4409 #endif
4410 }
4411
4412 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4413         uint32_t srr_rel_offs, int *xmit_type)
4414 {
4415         int res = 0, rel_offs;
4416
4417         rel_offs = srr_rel_offs - cmd->offset;
4418         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4419             srr_rel_offs, rel_offs);
4420
4421         *xmit_type = QLA_TGT_XMIT_ALL;
4422
4423         if (rel_offs < 0) {
4424                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4425                     "qla_target(%d): SRR rel_offs (%d) < 0",
4426                     cmd->vha->vp_idx, rel_offs);
4427                 res = -1;
4428         } else if (rel_offs == cmd->bufflen)
4429                 *xmit_type = QLA_TGT_XMIT_STATUS;
4430         else if (rel_offs > 0)
4431                 res = qlt_set_data_offset(cmd, rel_offs);
4432
4433         return res;
4434 }
4435
4436 /* No locks, thread context */
4437 static void qlt_handle_srr(struct scsi_qla_host *vha,
4438         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4439 {
4440         struct imm_ntfy_from_isp *ntfy =
4441             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4442         struct qla_hw_data *ha = vha->hw;
4443         struct qla_tgt_cmd *cmd = sctio->cmd;
4444         struct se_cmd *se_cmd = &cmd->se_cmd;
4445         unsigned long flags;
4446         int xmit_type = 0, resp = 0;
4447         uint32_t offset;
4448         uint16_t srr_ui;
4449
4450         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4451         srr_ui = ntfy->u.isp24.srr_ui;
4452
4453         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4454             cmd, srr_ui);
4455
4456         switch (srr_ui) {
4457         case SRR_IU_STATUS:
4458                 spin_lock_irqsave(&ha->hardware_lock, flags);
4459                 qlt_send_notify_ack(vha, ntfy,
4460                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4461                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4462                 xmit_type = QLA_TGT_XMIT_STATUS;
4463                 resp = 1;
4464                 break;
4465         case SRR_IU_DATA_IN:
4466                 if (!cmd->sg || !cmd->sg_cnt) {
4467                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4468                             "Unable to process SRR_IU_DATA_IN due to"
4469                             " missing cmd->sg, state: %d\n", cmd->state);
4470                         dump_stack();
4471                         goto out_reject;
4472                 }
4473                 if (se_cmd->scsi_status != 0) {
4474                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4475                             "Rejecting SRR_IU_DATA_IN with non GOOD "
4476                             "scsi_status\n");
4477                         goto out_reject;
4478                 }
4479                 cmd->bufflen = se_cmd->data_length;
4480
4481                 if (qlt_has_data(cmd)) {
4482                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4483                                 goto out_reject;
4484                         spin_lock_irqsave(&ha->hardware_lock, flags);
4485                         qlt_send_notify_ack(vha, ntfy,
4486                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4487                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4488                         resp = 1;
4489                 } else {
4490                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4491                                "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4492                                vha->vp_idx, se_cmd->tag,
4493                             cmd->se_cmd.scsi_status);
4494                         goto out_reject;
4495                 }
4496                 break;
4497         case SRR_IU_DATA_OUT:
4498                 if (!cmd->sg || !cmd->sg_cnt) {
4499                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4500                             "Unable to process SRR_IU_DATA_OUT due to"
4501                             " missing cmd->sg\n");
4502                         dump_stack();
4503                         goto out_reject;
4504                 }
4505                 if (se_cmd->scsi_status != 0) {
4506                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4507                             "Rejecting SRR_IU_DATA_OUT"
4508                             " with non GOOD scsi_status\n");
4509                         goto out_reject;
4510                 }
4511                 cmd->bufflen = se_cmd->data_length;
4512
4513                 if (qlt_has_data(cmd)) {
4514                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4515                                 goto out_reject;
4516                         spin_lock_irqsave(&ha->hardware_lock, flags);
4517                         qlt_send_notify_ack(vha, ntfy,
4518                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4519                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4520                         if (xmit_type & QLA_TGT_XMIT_DATA) {
4521                                 cmd->cmd_flags |= BIT_8;
4522                                 qlt_rdy_to_xfer(cmd);
4523                         }
4524                 } else {
4525                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4526                             "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4527                                vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4528                         goto out_reject;
4529                 }
4530                 break;
4531         default:
4532                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4533                     "qla_target(%d): Unknown srr_ui value %x",
4534                     vha->vp_idx, srr_ui);
4535                 goto out_reject;
4536         }
4537
4538         /* Transmit response in case of status and data-in cases */
4539         if (resp) {
4540                 cmd->cmd_flags |= BIT_7;
4541                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4542         }
4543
4544         return;
4545
4546 out_reject:
4547         spin_lock_irqsave(&ha->hardware_lock, flags);
4548         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4549             NOTIFY_ACK_SRR_FLAGS_REJECT,
4550             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4551             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4552         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4553                 cmd->state = QLA_TGT_STATE_DATA_IN;
4554                 dump_stack();
4555         } else {
4556                 cmd->cmd_flags |= BIT_9;
4557                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
4558         }
4559         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4560 }
4561
4562 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4563         struct qla_tgt_srr_imm *imm, int ha_locked)
4564 {
4565         struct qla_hw_data *ha = vha->hw;
4566         unsigned long flags = 0;
4567
4568 #ifndef __CHECKER__
4569         if (!ha_locked)
4570                 spin_lock_irqsave(&ha->hardware_lock, flags);
4571 #endif
4572
4573         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4574             NOTIFY_ACK_SRR_FLAGS_REJECT,
4575             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4576             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4577
4578 #ifndef __CHECKER__
4579         if (!ha_locked)
4580                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4581 #endif
4582
4583         kfree(imm);
4584 }
4585
4586 static void qlt_handle_srr_work(struct work_struct *work)
4587 {
4588         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4589         struct scsi_qla_host *vha = tgt->vha;
4590         struct qla_tgt_srr_ctio *sctio;
4591         unsigned long flags;
4592
4593         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4594             tgt);
4595
4596 restart:
4597         spin_lock_irqsave(&tgt->srr_lock, flags);
4598         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4599                 struct qla_tgt_srr_imm *imm, *i, *ti;
4600                 struct qla_tgt_cmd *cmd;
4601                 struct se_cmd *se_cmd;
4602
4603                 imm = NULL;
4604                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4605                                                 srr_list_entry) {
4606                         if (i->srr_id == sctio->srr_id) {
4607                                 list_del(&i->srr_list_entry);
4608                                 if (imm) {
4609                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4610                                           "qla_target(%d): There must be "
4611                                           "only one IMM SRR per CTIO SRR "
4612                                           "(IMM SRR %p, id %d, CTIO %p\n",
4613                                           vha->vp_idx, i, i->srr_id, sctio);
4614                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4615                                 } else
4616                                         imm = i;
4617                         }
4618                 }
4619
4620                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4621                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4622                     sctio->srr_id);
4623
4624                 if (imm == NULL) {
4625                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4626                             "Not found matching IMM for SRR CTIO (id %d)\n",
4627                             sctio->srr_id);
4628                         continue;
4629                 } else
4630                         list_del(&sctio->srr_list_entry);
4631
4632                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4633
4634                 cmd = sctio->cmd;
4635                 /*
4636                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4637                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4638                  * logic..
4639                  */
4640                 cmd->offset = 0;
4641                 if (cmd->free_sg) {
4642                         kfree(cmd->sg);
4643                         cmd->sg = NULL;
4644                         cmd->free_sg = 0;
4645                 }
4646                 se_cmd = &cmd->se_cmd;
4647
4648                 cmd->sg_cnt = se_cmd->t_data_nents;
4649                 cmd->sg = se_cmd->t_data_sg;
4650
4651                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4652                        "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4653                        cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4654                        se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4655
4656                 qlt_handle_srr(vha, sctio, imm);
4657
4658                 kfree(imm);
4659                 kfree(sctio);
4660                 goto restart;
4661         }
4662         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4663 }
4664
4665 /* ha->hardware_lock supposed to be held on entry */
4666 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4667         struct imm_ntfy_from_isp *iocb)
4668 {
4669         struct qla_tgt_srr_imm *imm;
4670         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4671         struct qla_tgt_srr_ctio *sctio;
4672
4673         tgt->imm_srr_id++;
4674
4675         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4676             vha->vp_idx);
4677
4678         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4679         if (imm != NULL) {
4680                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4681
4682                 /* IRQ is already OFF */
4683                 spin_lock(&tgt->srr_lock);
4684                 imm->srr_id = tgt->imm_srr_id;
4685                 list_add_tail(&imm->srr_list_entry,
4686                     &tgt->srr_imm_list);
4687                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4688                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4689                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4690                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4691                         int found = 0;
4692                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4693                             srr_list_entry) {
4694                                 if (sctio->srr_id == imm->srr_id) {
4695                                         found = 1;
4696                                         break;
4697                                 }
4698                         }
4699                         if (found) {
4700                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4701                                     "Scheduling srr work\n");
4702                                 schedule_work(&tgt->srr_work);
4703                         } else {
4704                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4705                                     "qla_target(%d): imm_srr_id "
4706                                     "== ctio_srr_id (%d), but there is no "
4707                                     "corresponding SRR CTIO, deleting IMM "
4708                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4709                                     imm);
4710                                 list_del(&imm->srr_list_entry);
4711
4712                                 kfree(imm);
4713
4714                                 spin_unlock(&tgt->srr_lock);
4715                                 goto out_reject;
4716                         }
4717                 }
4718                 spin_unlock(&tgt->srr_lock);
4719         } else {
4720                 struct qla_tgt_srr_ctio *ts;
4721
4722                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4723                     "qla_target(%d): Unable to allocate SRR IMM "
4724                     "entry, SRR request will be rejected\n", vha->vp_idx);
4725
4726                 /* IRQ is already OFF */
4727                 spin_lock(&tgt->srr_lock);
4728                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4729                     srr_list_entry) {
4730                         if (sctio->srr_id == tgt->imm_srr_id) {
4731                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4732                                     "CTIO SRR %p deleted (id %d)\n",
4733                                     sctio, sctio->srr_id);
4734                                 list_del(&sctio->srr_list_entry);
4735                                 qlt_send_term_exchange(vha, sctio->cmd,
4736                                     &sctio->cmd->atio, 1);
4737                                 kfree(sctio);
4738                         }
4739                 }
4740                 spin_unlock(&tgt->srr_lock);
4741                 goto out_reject;
4742         }
4743
4744         return;
4745
4746 out_reject:
4747         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4748             NOTIFY_ACK_SRR_FLAGS_REJECT,
4749             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4750             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4751 }
4752
4753 /*
4754  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4755  */
4756 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4757         struct imm_ntfy_from_isp *iocb)
4758 {
4759         struct qla_hw_data *ha = vha->hw;
4760         uint32_t add_flags = 0;
4761         int send_notify_ack = 1;
4762         uint16_t status;
4763
4764         status = le16_to_cpu(iocb->u.isp2x.status);
4765         switch (status) {
4766         case IMM_NTFY_LIP_RESET:
4767         {
4768                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4769                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4770                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4771                     iocb->u.isp24.status_subcode);
4772
4773                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4774                         send_notify_ack = 0;
4775                 break;
4776         }
4777
4778         case IMM_NTFY_LIP_LINK_REINIT:
4779         {
4780                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4781                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4782                     "qla_target(%d): LINK REINIT (loop %#x, "
4783                     "subcode %x)\n", vha->vp_idx,
4784                     le16_to_cpu(iocb->u.isp24.nport_handle),
4785                     iocb->u.isp24.status_subcode);
4786                 if (tgt->link_reinit_iocb_pending) {
4787                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4788                             0, 0, 0, 0, 0, 0);
4789                 }
4790                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4791                 tgt->link_reinit_iocb_pending = 1;
4792                 /*
4793                  * QLogic requires to wait after LINK REINIT for possible
4794                  * PDISC or ADISC ELS commands
4795                  */
4796                 send_notify_ack = 0;
4797                 break;
4798         }
4799
4800         case IMM_NTFY_PORT_LOGOUT:
4801                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4802                     "qla_target(%d): Port logout (loop "
4803                     "%#x, subcode %x)\n", vha->vp_idx,
4804                     le16_to_cpu(iocb->u.isp24.nport_handle),
4805                     iocb->u.isp24.status_subcode);
4806
4807                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4808                         send_notify_ack = 0;
4809                 /* The sessions will be cleared in the callback, if needed */
4810                 break;
4811
4812         case IMM_NTFY_GLBL_TPRLO:
4813                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4814                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4815                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4816                         send_notify_ack = 0;
4817                 /* The sessions will be cleared in the callback, if needed */
4818                 break;
4819
4820         case IMM_NTFY_PORT_CONFIG:
4821                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4822                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4823                     status);
4824                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4825                         send_notify_ack = 0;
4826                 /* The sessions will be cleared in the callback, if needed */
4827                 break;
4828
4829         case IMM_NTFY_GLBL_LOGO:
4830                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4831                     "qla_target(%d): Link failure detected\n",
4832                     vha->vp_idx);
4833                 /* I_T nexus loss */
4834                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4835                         send_notify_ack = 0;
4836                 break;
4837
4838         case IMM_NTFY_IOCB_OVERFLOW:
4839                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4840                     "qla_target(%d): Cannot provide requested "
4841                     "capability (IOCB overflowed the immediate notify "
4842                     "resource count)\n", vha->vp_idx);
4843                 break;
4844
4845         case IMM_NTFY_ABORT_TASK:
4846                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4847                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4848                     "L %#x)\n", vha->vp_idx,
4849                     le16_to_cpu(iocb->u.isp2x.seq_id),
4850                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4851                     le16_to_cpu(iocb->u.isp2x.lun));
4852                 if (qlt_abort_task(vha, iocb) == 0)
4853                         send_notify_ack = 0;
4854                 break;
4855
4856         case IMM_NTFY_RESOURCE:
4857                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4858                     "qla_target(%d): Out of resources, host %ld\n",
4859                     vha->vp_idx, vha->host_no);
4860                 break;
4861
4862         case IMM_NTFY_MSG_RX:
4863                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4864                     "qla_target(%d): Immediate notify task %x\n",
4865                     vha->vp_idx, iocb->u.isp2x.task_flags);
4866                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4867                         send_notify_ack = 0;
4868                 break;
4869
4870         case IMM_NTFY_ELS:
4871                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4872                         send_notify_ack = 0;
4873                 break;
4874
4875         case IMM_NTFY_SRR:
4876                 qlt_prepare_srr_imm(vha, iocb);
4877                 send_notify_ack = 0;
4878                 break;
4879
4880         default:
4881                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4882                     "qla_target(%d): Received unknown immediate "
4883                     "notify status %x\n", vha->vp_idx, status);
4884                 break;
4885         }
4886
4887         if (send_notify_ack)
4888                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4889 }
4890
4891 /*
4892  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4893  * This function sends busy to ISP 2xxx or 24xx.
4894  */
4895 static int __qlt_send_busy(struct scsi_qla_host *vha,
4896         struct atio_from_isp *atio, uint16_t status)
4897 {
4898         struct ctio7_to_24xx *ctio24;
4899         struct qla_hw_data *ha = vha->hw;
4900         request_t *pkt;
4901         struct qla_tgt_sess *sess = NULL;
4902
4903         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4904             atio->u.isp24.fcp_hdr.s_id);
4905         if (!sess) {
4906                 qlt_send_term_exchange(vha, NULL, atio, 1);
4907                 return 0;
4908         }
4909         /* Sending marker isn't necessary, since we called from ISR */
4910
4911         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4912         if (!pkt) {
4913                 ql_dbg(ql_dbg_io, vha, 0x3063,
4914                     "qla_target(%d): %s failed: unable to allocate "
4915                     "request packet", vha->vp_idx, __func__);
4916                 return -ENOMEM;
4917         }
4918
4919         pkt->entry_count = 1;
4920         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4921
4922         ctio24 = (struct ctio7_to_24xx *)pkt;
4923         ctio24->entry_type = CTIO_TYPE7;
4924         ctio24->nport_handle = sess->loop_id;
4925         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
4926         ctio24->vp_index = vha->vp_idx;
4927         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4928         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4929         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4930         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4931         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4932             cpu_to_le16(
4933                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4934                 CTIO7_FLAGS_DONT_RET_CTIO);
4935         /*
4936          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4937          * if the explicit conformation is used.
4938          */
4939         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4940         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4941         /* Memory Barrier */
4942         wmb();
4943         qla2x00_start_iocbs(vha, vha->req);
4944         return 0;
4945 }
4946
4947 /*
4948  * This routine is used to allocate a command for either a QFull condition
4949  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4950  * out previously.
4951  */
4952 static void
4953 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4954         struct atio_from_isp *atio, uint16_t status, int qfull)
4955 {
4956         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4957         struct qla_hw_data *ha = vha->hw;
4958         struct qla_tgt_sess *sess;
4959         struct se_session *se_sess;
4960         struct qla_tgt_cmd *cmd;
4961         int tag;
4962
4963         if (unlikely(tgt->tgt_stop)) {
4964                 ql_dbg(ql_dbg_io, vha, 0x300a,
4965                         "New command while device %p is shutting down\n", tgt);
4966                 return;
4967         }
4968
4969         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4970                 vha->hw->tgt.num_qfull_cmds_dropped++;
4971                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4972                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4973                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4974                                 vha->hw->tgt.num_qfull_cmds_dropped;
4975
4976                 ql_dbg(ql_dbg_io, vha, 0x3068,
4977                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4978                         vha->vp_idx, __func__,
4979                         vha->hw->tgt.num_qfull_cmds_dropped);
4980
4981                 qlt_chk_exch_leak_thresh_hold(vha);
4982                 return;
4983         }
4984
4985         sess = ha->tgt.tgt_ops->find_sess_by_s_id
4986                 (vha, atio->u.isp24.fcp_hdr.s_id);
4987         if (!sess)
4988                 return;
4989
4990         se_sess = sess->se_sess;
4991
4992         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4993         if (tag < 0)
4994                 return;
4995
4996         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4997         if (!cmd) {
4998                 ql_dbg(ql_dbg_io, vha, 0x3009,
4999                         "qla_target(%d): %s: Allocation of cmd failed\n",
5000                         vha->vp_idx, __func__);
5001
5002                 vha->hw->tgt.num_qfull_cmds_dropped++;
5003                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5004                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
5005                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
5006                                 vha->hw->tgt.num_qfull_cmds_dropped;
5007
5008                 qlt_chk_exch_leak_thresh_hold(vha);
5009                 return;
5010         }
5011
5012         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5013
5014         qlt_incr_num_pend_cmds(vha);
5015         INIT_LIST_HEAD(&cmd->cmd_list);
5016         memcpy(&cmd->atio, atio, sizeof(*atio));
5017
5018         cmd->tgt = vha->vha_tgt.qla_tgt;
5019         cmd->vha = vha;
5020         cmd->reset_count = vha->hw->chip_reset;
5021         cmd->q_full = 1;
5022
5023         if (qfull) {
5024                 cmd->q_full = 1;
5025                 /* NOTE: borrowing the state field to carry the status */
5026                 cmd->state = status;
5027         } else
5028                 cmd->term_exchg = 1;
5029
5030         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5031
5032         vha->hw->tgt.num_qfull_cmds_alloc++;
5033         if (vha->hw->tgt.num_qfull_cmds_alloc >
5034                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
5035                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
5036                         vha->hw->tgt.num_qfull_cmds_alloc;
5037 }
5038
5039 int
5040 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5041 {
5042         struct qla_hw_data *ha = vha->hw;
5043         unsigned long flags;
5044         struct qla_tgt_cmd *cmd, *tcmd;
5045         struct list_head free_list;
5046         int rc = 0;
5047
5048         if (list_empty(&ha->tgt.q_full_list))
5049                 return 0;
5050
5051         INIT_LIST_HEAD(&free_list);
5052
5053         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5054
5055         if (list_empty(&ha->tgt.q_full_list)) {
5056                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5057                 return 0;
5058         }
5059
5060         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5061                 if (cmd->q_full)
5062                         /* cmd->state is a borrowed field to hold status */
5063                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5064                 else if (cmd->term_exchg)
5065                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5066
5067                 if (rc == -ENOMEM)
5068                         break;
5069
5070                 if (cmd->q_full)
5071                         ql_dbg(ql_dbg_io, vha, 0x3006,
5072                             "%s: busy sent for ox_id[%04x]\n", __func__,
5073                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5074                 else if (cmd->term_exchg)
5075                         ql_dbg(ql_dbg_io, vha, 0x3007,
5076                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5077                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5078                 else
5079                         ql_dbg(ql_dbg_io, vha, 0x3008,
5080                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5081                             cmd);
5082
5083                 list_del(&cmd->cmd_list);
5084                 list_add_tail(&cmd->cmd_list, &free_list);
5085
5086                 /* piggy back on hardware_lock for protection */
5087                 vha->hw->tgt.num_qfull_cmds_alloc--;
5088         }
5089         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5090
5091         cmd = NULL;
5092
5093         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5094                 list_del(&cmd->cmd_list);
5095                 /* This cmd was never sent to TCM.  There is no need
5096                  * to schedule free or call free_cmd
5097                  */
5098                 qlt_free_cmd(cmd);
5099         }
5100         return rc;
5101 }
5102
5103 static void
5104 qlt_send_busy(struct scsi_qla_host *vha,
5105         struct atio_from_isp *atio, uint16_t status)
5106 {
5107         int rc = 0;
5108
5109         rc = __qlt_send_busy(vha, atio, status);
5110         if (rc == -ENOMEM)
5111                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5112 }
5113
5114 static int
5115 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5116         struct atio_from_isp *atio)
5117 {
5118         struct qla_hw_data *ha = vha->hw;
5119         uint16_t status;
5120
5121         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5122                 return 0;
5123
5124         status = temp_sam_status;
5125         qlt_send_busy(vha, atio, status);
5126         return 1;
5127 }
5128
5129 /* ha->hardware_lock supposed to be held on entry */
5130 /* called via callback from qla2xxx */
5131 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5132         struct atio_from_isp *atio)
5133 {
5134         struct qla_hw_data *ha = vha->hw;
5135         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5136         int rc;
5137
5138         if (unlikely(tgt == NULL)) {
5139                 ql_dbg(ql_dbg_io, vha, 0x3064,
5140                     "ATIO pkt, but no tgt (ha %p)", ha);
5141                 return;
5142         }
5143         /*
5144          * In tgt_stop mode we also should allow all requests to pass.
5145          * Otherwise, some commands can stuck.
5146          */
5147
5148         tgt->irq_cmd_count++;
5149
5150         switch (atio->u.raw.entry_type) {
5151         case ATIO_TYPE7:
5152                 if (unlikely(atio->u.isp24.exchange_addr ==
5153                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5154                         ql_dbg(ql_dbg_io, vha, 0x3065,
5155                             "qla_target(%d): ATIO_TYPE7 "
5156                             "received with UNKNOWN exchange address, "
5157                             "sending QUEUE_FULL\n", vha->vp_idx);
5158                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5159                         break;
5160                 }
5161
5162
5163
5164                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5165                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
5166                         if (rc != 0) {
5167                                 tgt->irq_cmd_count--;
5168                                 return;
5169                         }
5170                         rc = qlt_handle_cmd_for_atio(vha, atio);
5171                 } else {
5172                         rc = qlt_handle_task_mgmt(vha, atio);
5173                 }
5174                 if (unlikely(rc != 0)) {
5175                         if (rc == -ESRCH) {
5176 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5177                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5178 #else
5179                                 qlt_send_term_exchange(vha, NULL, atio, 1);
5180 #endif
5181                         } else {
5182                                 if (tgt->tgt_stop) {
5183                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5184                                             "qla_target: Unable to send "
5185                                             "command to target for req, "
5186                                             "ignoring.\n");
5187                                 } else {
5188                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5189                                             "qla_target(%d): Unable to send "
5190                                             "command to target, sending BUSY "
5191                                             "status.\n", vha->vp_idx);
5192                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5193                                 }
5194                         }
5195                 }
5196                 break;
5197
5198         case IMMED_NOTIFY_TYPE:
5199         {
5200                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5201                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5202                             "qla_target(%d): Received ATIO packet %x "
5203                             "with error status %x\n", vha->vp_idx,
5204                             atio->u.raw.entry_type,
5205                             atio->u.isp2x.entry_status);
5206                         break;
5207                 }
5208                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5209                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5210                 break;
5211         }
5212
5213         default:
5214                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5215                     "qla_target(%d): Received unknown ATIO atio "
5216                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5217                 break;
5218         }
5219
5220         tgt->irq_cmd_count--;
5221 }
5222
5223 /* ha->hardware_lock supposed to be held on entry */
5224 /* called via callback from qla2xxx */
5225 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5226 {
5227         struct qla_hw_data *ha = vha->hw;
5228         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5229
5230         if (unlikely(tgt == NULL)) {
5231                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5232                     "qla_target(%d): Response pkt %x received, but no "
5233                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5234                 return;
5235         }
5236
5237         /*
5238          * In tgt_stop mode we also should allow all requests to pass.
5239          * Otherwise, some commands can stuck.
5240          */
5241
5242         tgt->irq_cmd_count++;
5243
5244         switch (pkt->entry_type) {
5245         case CTIO_CRC2:
5246         case CTIO_TYPE7:
5247         {
5248                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5249                 qlt_do_ctio_completion(vha, entry->handle,
5250                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5251                     entry);
5252                 break;
5253         }
5254
5255         case ACCEPT_TGT_IO_TYPE:
5256         {
5257                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5258                 int rc;
5259                 if (atio->u.isp2x.status !=
5260                     cpu_to_le16(ATIO_CDB_VALID)) {
5261                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5262                             "qla_target(%d): ATIO with error "
5263                             "status %x received\n", vha->vp_idx,
5264                             le16_to_cpu(atio->u.isp2x.status));
5265                         break;
5266                 }
5267
5268                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5269                 if (rc != 0) {
5270                         tgt->irq_cmd_count--;
5271                         return;
5272                 }
5273
5274                 rc = qlt_handle_cmd_for_atio(vha, atio);
5275                 if (unlikely(rc != 0)) {
5276                         if (rc == -ESRCH) {
5277 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5278                                 qlt_send_busy(vha, atio, 0);
5279 #else
5280                                 qlt_send_term_exchange(vha, NULL, atio, 1);
5281 #endif
5282                         } else {
5283                                 if (tgt->tgt_stop) {
5284                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5285                                             "qla_target: Unable to send "
5286                                             "command to target, sending TERM "
5287                                             "EXCHANGE for rsp\n");
5288                                         qlt_send_term_exchange(vha, NULL,
5289                                             atio, 1);
5290                                 } else {
5291                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5292                                             "qla_target(%d): Unable to send "
5293                                             "command to target, sending BUSY "
5294                                             "status\n", vha->vp_idx);
5295                                         qlt_send_busy(vha, atio, 0);
5296                                 }
5297                         }
5298                 }
5299         }
5300         break;
5301
5302         case CONTINUE_TGT_IO_TYPE:
5303         {
5304                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5305                 qlt_do_ctio_completion(vha, entry->handle,
5306                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5307                     entry);
5308                 break;
5309         }
5310
5311         case CTIO_A64_TYPE:
5312         {
5313                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5314                 qlt_do_ctio_completion(vha, entry->handle,
5315                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5316                     entry);
5317                 break;
5318         }
5319
5320         case IMMED_NOTIFY_TYPE:
5321                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5322                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5323                 break;
5324
5325         case NOTIFY_ACK_TYPE:
5326                 if (tgt->notify_ack_expected > 0) {
5327                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5328                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5329                             "NOTIFY_ACK seq %08x status %x\n",
5330                             le16_to_cpu(entry->u.isp2x.seq_id),
5331                             le16_to_cpu(entry->u.isp2x.status));
5332                         tgt->notify_ack_expected--;
5333                         if (entry->u.isp2x.status !=
5334                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5335                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5336                                     "qla_target(%d): NOTIFY_ACK "
5337                                     "failed %x\n", vha->vp_idx,
5338                                     le16_to_cpu(entry->u.isp2x.status));
5339                         }
5340                 } else {
5341                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5342                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5343                             vha->vp_idx);
5344                 }
5345                 break;
5346
5347         case ABTS_RECV_24XX:
5348                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5349                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5350                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5351                 break;
5352
5353         case ABTS_RESP_24XX:
5354                 if (tgt->abts_resp_expected > 0) {
5355                         struct abts_resp_from_24xx_fw *entry =
5356                                 (struct abts_resp_from_24xx_fw *)pkt;
5357                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5358                             "ABTS_RESP_24XX: compl_status %x\n",
5359                             entry->compl_status);
5360                         tgt->abts_resp_expected--;
5361                         if (le16_to_cpu(entry->compl_status) !=
5362                             ABTS_RESP_COMPL_SUCCESS) {
5363                                 if ((entry->error_subcode1 == 0x1E) &&
5364                                     (entry->error_subcode2 == 0)) {
5365                                         /*
5366                                          * We've got a race here: aborted
5367                                          * exchange not terminated, i.e.
5368                                          * response for the aborted command was
5369                                          * sent between the abort request was
5370                                          * received and processed.
5371                                          * Unfortunately, the firmware has a
5372                                          * silly requirement that all aborted
5373                                          * exchanges must be explicitely
5374                                          * terminated, otherwise it refuses to
5375                                          * send responses for the abort
5376                                          * requests. So, we have to
5377                                          * (re)terminate the exchange and retry
5378                                          * the abort response.
5379                                          */
5380                                         qlt_24xx_retry_term_exchange(vha,
5381                                             entry);
5382                                 } else
5383                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5384                                             "qla_target(%d): ABTS_RESP_24XX "
5385                                             "failed %x (subcode %x:%x)",
5386                                             vha->vp_idx, entry->compl_status,
5387                                             entry->error_subcode1,
5388                                             entry->error_subcode2);
5389                         }
5390                 } else {
5391                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5392                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5393                             "received\n", vha->vp_idx);
5394                 }
5395                 break;
5396
5397         default:
5398                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5399                     "qla_target(%d): Received unknown response pkt "
5400                     "type %x\n", vha->vp_idx, pkt->entry_type);
5401                 break;
5402         }
5403
5404         tgt->irq_cmd_count--;
5405 }
5406
5407 /*
5408  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5409  */
5410 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5411         uint16_t *mailbox)
5412 {
5413         struct qla_hw_data *ha = vha->hw;
5414         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5415         int login_code;
5416
5417         if (!ha->tgt.tgt_ops)
5418                 return;
5419
5420         if (unlikely(tgt == NULL)) {
5421                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5422                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5423                 return;
5424         }
5425
5426         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5427             IS_QLA2100(ha))
5428                 return;
5429         /*
5430          * In tgt_stop mode we also should allow all requests to pass.
5431          * Otherwise, some commands can stuck.
5432          */
5433
5434         tgt->irq_cmd_count++;
5435
5436         switch (code) {
5437         case MBA_RESET:                 /* Reset */
5438         case MBA_SYSTEM_ERR:            /* System Error */
5439         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5440         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5441                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5442                     "qla_target(%d): System error async event %#x "
5443                     "occurred", vha->vp_idx, code);
5444                 break;
5445         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5446                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5447                 break;
5448
5449         case MBA_LOOP_UP:
5450         {
5451                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5452                     "qla_target(%d): Async LOOP_UP occurred "
5453                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5454                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5455                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5456                 if (tgt->link_reinit_iocb_pending) {
5457                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5458                             0, 0, 0, 0, 0, 0);
5459                         tgt->link_reinit_iocb_pending = 0;
5460                 }
5461                 break;
5462         }
5463
5464         case MBA_LIP_OCCURRED:
5465         case MBA_LOOP_DOWN:
5466         case MBA_LIP_RESET:
5467         case MBA_RSCN_UPDATE:
5468                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5469                     "qla_target(%d): Async event %#x occurred "
5470                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5471                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5472                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5473                 break;
5474
5475         case MBA_PORT_UPDATE:
5476                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5477                     "qla_target(%d): Port update async event %#x "
5478                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5479                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5480                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5481                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5482
5483                 login_code = le16_to_cpu(mailbox[2]);
5484                 if (login_code == 0x4)
5485                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5486                             "Async MB 2: Got PLOGI Complete\n");
5487                 else if (login_code == 0x7)
5488                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5489                             "Async MB 2: Port Logged Out\n");
5490                 break;
5491
5492         default:
5493                 break;
5494         }
5495
5496         tgt->irq_cmd_count--;
5497 }
5498
5499 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5500         uint16_t loop_id)
5501 {
5502         fc_port_t *fcport;
5503         int rc;
5504
5505         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5506         if (!fcport) {
5507                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5508                     "qla_target(%d): Allocation of tmp FC port failed",
5509                     vha->vp_idx);
5510                 return NULL;
5511         }
5512
5513         fcport->loop_id = loop_id;
5514
5515         rc = qla2x00_get_port_database(vha, fcport, 0);
5516         if (rc != QLA_SUCCESS) {
5517                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5518                     "qla_target(%d): Failed to retrieve fcport "
5519                     "information -- get_port_database() returned %x "
5520                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5521                 kfree(fcport);
5522                 return NULL;
5523         }
5524
5525         return fcport;
5526 }
5527
5528 /* Must be called under tgt_mutex */
5529 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5530         uint8_t *s_id)
5531 {
5532         struct qla_tgt_sess *sess = NULL;
5533         fc_port_t *fcport = NULL;
5534         int rc, global_resets;
5535         uint16_t loop_id = 0;
5536
5537 retry:
5538         global_resets =
5539             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5540
5541         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5542         if (rc != 0) {
5543                 if ((s_id[0] == 0xFF) &&
5544                     (s_id[1] == 0xFC)) {
5545                         /*
5546                          * This is Domain Controller, so it should be
5547                          * OK to drop SCSI commands from it.
5548                          */
5549                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5550                             "Unable to find initiator with S_ID %x:%x:%x",
5551                             s_id[0], s_id[1], s_id[2]);
5552                 } else
5553                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
5554                             "qla_target(%d): Unable to find "
5555                             "initiator with S_ID %x:%x:%x",
5556                             vha->vp_idx, s_id[0], s_id[1],
5557                             s_id[2]);
5558                 return NULL;
5559         }
5560
5561         fcport = qlt_get_port_database(vha, loop_id);
5562         if (!fcport)
5563                 return NULL;
5564
5565         if (global_resets !=
5566             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5567                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5568                     "qla_target(%d): global reset during session discovery "
5569                     "(counter was %d, new %d), retrying", vha->vp_idx,
5570                     global_resets,
5571                     atomic_read(&vha->vha_tgt.
5572                         qla_tgt->tgt_global_resets_count));
5573                 goto retry;
5574         }
5575
5576         sess = qlt_create_sess(vha, fcport, true);
5577
5578         kfree(fcport);
5579         return sess;
5580 }
5581
5582 static void qlt_abort_work(struct qla_tgt *tgt,
5583         struct qla_tgt_sess_work_param *prm)
5584 {
5585         struct scsi_qla_host *vha = tgt->vha;
5586         struct qla_hw_data *ha = vha->hw;
5587         struct qla_tgt_sess *sess = NULL;
5588         unsigned long flags;
5589         uint32_t be_s_id;
5590         uint8_t s_id[3];
5591         int rc;
5592
5593         spin_lock_irqsave(&ha->hardware_lock, flags);
5594
5595         if (tgt->tgt_stop)
5596                 goto out_term;
5597
5598         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5599         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5600         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5601
5602         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5603             (unsigned char *)&be_s_id);
5604         if (!sess) {
5605                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5606
5607                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5608                 sess = qlt_make_local_sess(vha, s_id);
5609                 /* sess has got an extra creation ref */
5610                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5611
5612                 spin_lock_irqsave(&ha->hardware_lock, flags);
5613                 if (!sess)
5614                         goto out_term;
5615         } else {
5616                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5617                         sess = NULL;
5618                         goto out_term;
5619                 }
5620
5621                 kref_get(&sess->se_sess->sess_kref);
5622         }
5623
5624         if (tgt->tgt_stop)
5625                 goto out_term;
5626
5627         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5628         if (rc != 0)
5629                 goto out_term;
5630
5631         ha->tgt.tgt_ops->put_sess(sess);
5632         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5633         return;
5634
5635 out_term:
5636         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5637         if (sess)
5638                 ha->tgt.tgt_ops->put_sess(sess);
5639         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5640 }
5641
5642 static void qlt_tmr_work(struct qla_tgt *tgt,
5643         struct qla_tgt_sess_work_param *prm)
5644 {
5645         struct atio_from_isp *a = &prm->tm_iocb2;
5646         struct scsi_qla_host *vha = tgt->vha;
5647         struct qla_hw_data *ha = vha->hw;
5648         struct qla_tgt_sess *sess = NULL;
5649         unsigned long flags;
5650         uint8_t *s_id = NULL; /* to hide compiler warnings */
5651         int rc;
5652         uint32_t lun, unpacked_lun;
5653         int fn;
5654         void *iocb;
5655
5656         spin_lock_irqsave(&ha->hardware_lock, flags);
5657
5658         if (tgt->tgt_stop)
5659                 goto out_term;
5660
5661         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5662         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5663         if (!sess) {
5664                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5665
5666                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5667                 sess = qlt_make_local_sess(vha, s_id);
5668                 /* sess has got an extra creation ref */
5669                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5670
5671                 spin_lock_irqsave(&ha->hardware_lock, flags);
5672                 if (!sess)
5673                         goto out_term;
5674         } else {
5675                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5676                         sess = NULL;
5677                         goto out_term;
5678                 }
5679
5680                 kref_get(&sess->se_sess->sess_kref);
5681         }
5682
5683         iocb = a;
5684         lun = a->u.isp24.fcp_cmnd.lun;
5685         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5686         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5687
5688         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5689         if (rc != 0)
5690                 goto out_term;
5691
5692         ha->tgt.tgt_ops->put_sess(sess);
5693         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5694         return;
5695
5696 out_term:
5697         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5698         if (sess)
5699                 ha->tgt.tgt_ops->put_sess(sess);
5700         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5701 }
5702
5703 static void qlt_sess_work_fn(struct work_struct *work)
5704 {
5705         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5706         struct scsi_qla_host *vha = tgt->vha;
5707         unsigned long flags;
5708
5709         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5710
5711         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5712         while (!list_empty(&tgt->sess_works_list)) {
5713                 struct qla_tgt_sess_work_param *prm = list_entry(
5714                     tgt->sess_works_list.next, typeof(*prm),
5715                     sess_works_list_entry);
5716
5717                 /*
5718                  * This work can be scheduled on several CPUs at time, so we
5719                  * must delete the entry to eliminate double processing
5720                  */
5721                 list_del(&prm->sess_works_list_entry);
5722
5723                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5724
5725                 switch (prm->type) {
5726                 case QLA_TGT_SESS_WORK_ABORT:
5727                         qlt_abort_work(tgt, prm);
5728                         break;
5729                 case QLA_TGT_SESS_WORK_TM:
5730                         qlt_tmr_work(tgt, prm);
5731                         break;
5732                 default:
5733                         BUG_ON(1);
5734                         break;
5735                 }
5736
5737                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5738
5739                 kfree(prm);
5740         }
5741         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5742 }
5743
5744 /* Must be called under tgt_host_action_mutex */
5745 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5746 {
5747         struct qla_tgt *tgt;
5748
5749         if (!QLA_TGT_MODE_ENABLED())
5750                 return 0;
5751
5752         if (!IS_TGT_MODE_CAPABLE(ha)) {
5753                 ql_log(ql_log_warn, base_vha, 0xe070,
5754                     "This adapter does not support target mode.\n");
5755                 return 0;
5756         }
5757
5758         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5759             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5760
5761         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5762
5763         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5764         if (!tgt) {
5765                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5766                     "Unable to allocate struct qla_tgt\n");
5767                 return -ENOMEM;
5768         }
5769
5770         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5771                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5772
5773         tgt->ha = ha;
5774         tgt->vha = base_vha;
5775         init_waitqueue_head(&tgt->waitQ);
5776         INIT_LIST_HEAD(&tgt->sess_list);
5777         INIT_LIST_HEAD(&tgt->del_sess_list);
5778         INIT_DELAYED_WORK(&tgt->sess_del_work,
5779                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5780         spin_lock_init(&tgt->sess_work_lock);
5781         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5782         INIT_LIST_HEAD(&tgt->sess_works_list);
5783         spin_lock_init(&tgt->srr_lock);
5784         INIT_LIST_HEAD(&tgt->srr_ctio_list);
5785         INIT_LIST_HEAD(&tgt->srr_imm_list);
5786         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5787         atomic_set(&tgt->tgt_global_resets_count, 0);
5788
5789         base_vha->vha_tgt.qla_tgt = tgt;
5790
5791         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5792                 "qla_target(%d): using 64 Bit PCI addressing",
5793                 base_vha->vp_idx);
5794         tgt->tgt_enable_64bit_addr = 1;
5795         /* 3 is reserved */
5796         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5797         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5798         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5799
5800         if (base_vha->fc_vport)
5801                 return 0;
5802
5803         mutex_lock(&qla_tgt_mutex);
5804         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5805         mutex_unlock(&qla_tgt_mutex);
5806
5807         return 0;
5808 }
5809
5810 /* Must be called under tgt_host_action_mutex */
5811 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5812 {
5813         if (!vha->vha_tgt.qla_tgt)
5814                 return 0;
5815
5816         if (vha->fc_vport) {
5817                 qlt_release(vha->vha_tgt.qla_tgt);
5818                 return 0;
5819         }
5820
5821         /* free left over qfull cmds */
5822         qlt_init_term_exchange(vha);
5823
5824         mutex_lock(&qla_tgt_mutex);
5825         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5826         mutex_unlock(&qla_tgt_mutex);
5827
5828         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5829             vha->host_no, ha);
5830         qlt_release(vha->vha_tgt.qla_tgt);
5831
5832         return 0;
5833 }
5834
5835 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5836         unsigned char *b)
5837 {
5838         int i;
5839
5840         pr_debug("qla2xxx HW vha->node_name: ");
5841         for (i = 0; i < WWN_SIZE; i++)
5842                 pr_debug("%02x ", vha->node_name[i]);
5843         pr_debug("\n");
5844         pr_debug("qla2xxx HW vha->port_name: ");
5845         for (i = 0; i < WWN_SIZE; i++)
5846                 pr_debug("%02x ", vha->port_name[i]);
5847         pr_debug("\n");
5848
5849         pr_debug("qla2xxx passed configfs WWPN: ");
5850         put_unaligned_be64(wwpn, b);
5851         for (i = 0; i < WWN_SIZE; i++)
5852                 pr_debug("%02x ", b[i]);
5853         pr_debug("\n");
5854 }
5855
5856 /**
5857  * qla_tgt_lport_register - register lport with external module
5858  *
5859  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5860  * @wwpn: Passwd FC target WWPN
5861  * @callback:  lport initialization callback for tcm_qla2xxx code
5862  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5863  */
5864 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5865                        u64 npiv_wwpn, u64 npiv_wwnn,
5866                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5867 {
5868         struct qla_tgt *tgt;
5869         struct scsi_qla_host *vha;
5870         struct qla_hw_data *ha;
5871         struct Scsi_Host *host;
5872         unsigned long flags;
5873         int rc;
5874         u8 b[WWN_SIZE];
5875
5876         mutex_lock(&qla_tgt_mutex);
5877         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5878                 vha = tgt->vha;
5879                 ha = vha->hw;
5880
5881                 host = vha->host;
5882                 if (!host)
5883                         continue;
5884
5885                 if (!(host->hostt->supported_mode & MODE_TARGET))
5886                         continue;
5887
5888                 spin_lock_irqsave(&ha->hardware_lock, flags);
5889                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5890                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5891                             host->host_no);
5892                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5893                         continue;
5894                 }
5895                 if (tgt->tgt_stop) {
5896                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5897                                  host->host_no);
5898                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5899                         continue;
5900                 }
5901                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5902
5903                 if (!scsi_host_get(host)) {
5904                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
5905                             "Unable to scsi_host_get() for"
5906                             " qla2xxx scsi_host\n");
5907                         continue;
5908                 }
5909                 qlt_lport_dump(vha, phys_wwpn, b);
5910
5911                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5912                         scsi_host_put(host);
5913                         continue;
5914                 }
5915                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5916                 if (rc != 0)
5917                         scsi_host_put(host);
5918
5919                 mutex_unlock(&qla_tgt_mutex);
5920                 return rc;
5921         }
5922         mutex_unlock(&qla_tgt_mutex);
5923
5924         return -ENODEV;
5925 }
5926 EXPORT_SYMBOL(qlt_lport_register);
5927
5928 /**
5929  * qla_tgt_lport_deregister - Degister lport
5930  *
5931  * @vha:  Registered scsi_qla_host pointer
5932  */
5933 void qlt_lport_deregister(struct scsi_qla_host *vha)
5934 {
5935         struct qla_hw_data *ha = vha->hw;
5936         struct Scsi_Host *sh = vha->host;
5937         /*
5938          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5939          */
5940         vha->vha_tgt.target_lport_ptr = NULL;
5941         ha->tgt.tgt_ops = NULL;
5942         /*
5943          * Release the Scsi_Host reference for the underlying qla2xxx host
5944          */
5945         scsi_host_put(sh);
5946 }
5947 EXPORT_SYMBOL(qlt_lport_deregister);
5948
5949 /* Must be called under HW lock */
5950 static void qlt_set_mode(struct scsi_qla_host *vha)
5951 {
5952         struct qla_hw_data *ha = vha->hw;
5953
5954         switch (ql2x_ini_mode) {
5955         case QLA2XXX_INI_MODE_DISABLED:
5956         case QLA2XXX_INI_MODE_EXCLUSIVE:
5957                 vha->host->active_mode = MODE_TARGET;
5958                 break;
5959         case QLA2XXX_INI_MODE_ENABLED:
5960                 vha->host->active_mode |= MODE_TARGET;
5961                 break;
5962         default:
5963                 break;
5964         }
5965
5966         if (ha->tgt.ini_mode_force_reverse)
5967                 qla_reverse_ini_mode(vha);
5968 }
5969
5970 /* Must be called under HW lock */
5971 static void qlt_clear_mode(struct scsi_qla_host *vha)
5972 {
5973         struct qla_hw_data *ha = vha->hw;
5974
5975         switch (ql2x_ini_mode) {
5976         case QLA2XXX_INI_MODE_DISABLED:
5977                 vha->host->active_mode = MODE_UNKNOWN;
5978                 break;
5979         case QLA2XXX_INI_MODE_EXCLUSIVE:
5980                 vha->host->active_mode = MODE_INITIATOR;
5981                 break;
5982         case QLA2XXX_INI_MODE_ENABLED:
5983                 vha->host->active_mode &= ~MODE_TARGET;
5984                 break;
5985         default:
5986                 break;
5987         }
5988
5989         if (ha->tgt.ini_mode_force_reverse)
5990                 qla_reverse_ini_mode(vha);
5991 }
5992
5993 /*
5994  * qla_tgt_enable_vha - NO LOCK HELD
5995  *
5996  * host_reset, bring up w/ Target Mode Enabled
5997  */
5998 void
5999 qlt_enable_vha(struct scsi_qla_host *vha)
6000 {
6001         struct qla_hw_data *ha = vha->hw;
6002         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6003         unsigned long flags;
6004         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6005
6006         if (!tgt) {
6007                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6008                     "Unable to locate qla_tgt pointer from"
6009                     " struct qla_hw_data\n");
6010                 dump_stack();
6011                 return;
6012         }
6013
6014         spin_lock_irqsave(&ha->hardware_lock, flags);
6015         tgt->tgt_stopped = 0;
6016         qlt_set_mode(vha);
6017         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6018
6019         if (vha->vp_idx) {
6020                 qla24xx_disable_vp(vha);
6021                 qla24xx_enable_vp(vha);
6022         } else {
6023                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6024                 qla2xxx_wake_dpc(base_vha);
6025                 qla2x00_wait_for_hba_online(base_vha);
6026         }
6027 }
6028 EXPORT_SYMBOL(qlt_enable_vha);
6029
6030 /*
6031  * qla_tgt_disable_vha - NO LOCK HELD
6032  *
6033  * Disable Target Mode and reset the adapter
6034  */
6035 static void qlt_disable_vha(struct scsi_qla_host *vha)
6036 {
6037         struct qla_hw_data *ha = vha->hw;
6038         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6039         unsigned long flags;
6040
6041         if (!tgt) {
6042                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6043                     "Unable to locate qla_tgt pointer from"
6044                     " struct qla_hw_data\n");
6045                 dump_stack();
6046                 return;
6047         }
6048
6049         spin_lock_irqsave(&ha->hardware_lock, flags);
6050         qlt_clear_mode(vha);
6051         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6052
6053         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6054         qla2xxx_wake_dpc(vha);
6055         qla2x00_wait_for_hba_online(vha);
6056 }
6057
6058 /*
6059  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6060  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6061  * members.
6062  */
6063 void
6064 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6065 {
6066         if (!qla_tgt_mode_enabled(vha))
6067                 return;
6068
6069         vha->vha_tgt.qla_tgt = NULL;
6070
6071         mutex_init(&vha->vha_tgt.tgt_mutex);
6072         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6073
6074         qlt_clear_mode(vha);
6075
6076         /*
6077          * NOTE: Currently the value is kept the same for <24xx and
6078          * >=24xx ISPs. If it is necessary to change it,
6079          * the check should be added for specific ISPs,
6080          * assigning the value appropriately.
6081          */
6082         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6083
6084         qlt_add_target(ha, vha);
6085 }
6086
6087 void
6088 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6089 {
6090         /*
6091          * FC-4 Feature bit 0 indicates target functionality to the name server.
6092          */
6093         if (qla_tgt_mode_enabled(vha)) {
6094                 if (qla_ini_mode_enabled(vha))
6095                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6096                 else
6097                         ct_req->req.rff_id.fc4_feature = BIT_0;
6098         } else if (qla_ini_mode_enabled(vha)) {
6099                 ct_req->req.rff_id.fc4_feature = BIT_1;
6100         }
6101 }
6102
6103 /*
6104  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6105  * @ha: HA context
6106  *
6107  * Beginning of ATIO ring has initialization control block already built
6108  * by nvram config routine.
6109  *
6110  * Returns 0 on success.
6111  */
6112 void
6113 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6114 {
6115         struct qla_hw_data *ha = vha->hw;
6116         uint16_t cnt;
6117         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6118
6119         if (!qla_tgt_mode_enabled(vha))
6120                 return;
6121
6122         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6123                 pkt->u.raw.signature = ATIO_PROCESSED;
6124                 pkt++;
6125         }
6126
6127 }
6128
6129 /*
6130  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6131  * @ha: SCSI driver HA context
6132  */
6133 void
6134 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
6135 {
6136         struct qla_hw_data *ha = vha->hw;
6137         struct atio_from_isp *pkt;
6138         int cnt, i;
6139
6140         if (!vha->flags.online)
6141                 return;
6142
6143         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
6144                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6145                 cnt = pkt->u.raw.entry_count;
6146
6147                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
6148
6149                 for (i = 0; i < cnt; i++) {
6150                         ha->tgt.atio_ring_index++;
6151                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6152                                 ha->tgt.atio_ring_index = 0;
6153                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6154                         } else
6155                                 ha->tgt.atio_ring_ptr++;
6156
6157                         pkt->u.raw.signature = ATIO_PROCESSED;
6158                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6159                 }
6160                 wmb();
6161         }
6162
6163         /* Adjust ring index */
6164         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6165         RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6166 }
6167
6168 void
6169 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6170 {
6171         struct qla_hw_data *ha = vha->hw;
6172         if (!QLA_TGT_MODE_ENABLED())
6173                 return;
6174
6175         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6176         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6177         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6178
6179         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6180                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6181                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6182
6183                 icb->msix_atio = cpu_to_le16(msix->entry);
6184                 ql_dbg(ql_dbg_init, vha, 0xf072,
6185                     "Registering ICB vector 0x%x for atio que.\n",
6186                     msix->entry);
6187         }
6188 }
6189
6190 void
6191 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6192 {
6193         struct qla_hw_data *ha = vha->hw;
6194
6195         if (qla_tgt_mode_enabled(vha)) {
6196                 if (!ha->tgt.saved_set) {
6197                         /* We save only once */
6198                         ha->tgt.saved_exchange_count = nv->exchange_count;
6199                         ha->tgt.saved_firmware_options_1 =
6200                             nv->firmware_options_1;
6201                         ha->tgt.saved_firmware_options_2 =
6202                             nv->firmware_options_2;
6203                         ha->tgt.saved_firmware_options_3 =
6204                             nv->firmware_options_3;
6205                         ha->tgt.saved_set = 1;
6206                 }
6207
6208                 nv->exchange_count = cpu_to_le16(0xFFFF);
6209
6210                 /* Enable target mode */
6211                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6212
6213                 /* Disable ini mode, if requested */
6214                 if (!qla_ini_mode_enabled(vha))
6215                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6216
6217                 /* Disable Full Login after LIP */
6218                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6219                 /* Enable initial LIP */
6220                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6221                 if (ql2xtgt_tape_enable)
6222                         /* Enable FC Tape support */
6223                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6224                 else
6225                         /* Disable FC Tape support */
6226                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6227
6228                 /* Disable Full Login after LIP */
6229                 nv->host_p &= cpu_to_le32(~BIT_10);
6230                 /* Enable target PRLI control */
6231                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6232         } else {
6233                 if (ha->tgt.saved_set) {
6234                         nv->exchange_count = ha->tgt.saved_exchange_count;
6235                         nv->firmware_options_1 =
6236                             ha->tgt.saved_firmware_options_1;
6237                         nv->firmware_options_2 =
6238                             ha->tgt.saved_firmware_options_2;
6239                         nv->firmware_options_3 =
6240                             ha->tgt.saved_firmware_options_3;
6241                 }
6242                 return;
6243         }
6244
6245         /* out-of-order frames reassembly */
6246         nv->firmware_options_3 |= BIT_6|BIT_9;
6247
6248         if (ha->tgt.enable_class_2) {
6249                 if (vha->flags.init_done)
6250                         fc_host_supported_classes(vha->host) =
6251                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6252
6253                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6254         } else {
6255                 if (vha->flags.init_done)
6256                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6257
6258                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6259         }
6260 }
6261
6262 void
6263 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6264         struct init_cb_24xx *icb)
6265 {
6266         struct qla_hw_data *ha = vha->hw;
6267
6268         if (ha->tgt.node_name_set) {
6269                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6270                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6271         }
6272 }
6273
6274 void
6275 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6276 {
6277         struct qla_hw_data *ha = vha->hw;
6278
6279         if (!QLA_TGT_MODE_ENABLED())
6280                 return;
6281
6282         if (qla_tgt_mode_enabled(vha)) {
6283                 if (!ha->tgt.saved_set) {
6284                         /* We save only once */
6285                         ha->tgt.saved_exchange_count = nv->exchange_count;
6286                         ha->tgt.saved_firmware_options_1 =
6287                             nv->firmware_options_1;
6288                         ha->tgt.saved_firmware_options_2 =
6289                             nv->firmware_options_2;
6290                         ha->tgt.saved_firmware_options_3 =
6291                             nv->firmware_options_3;
6292                         ha->tgt.saved_set = 1;
6293                 }
6294
6295                 nv->exchange_count = cpu_to_le16(0xFFFF);
6296
6297                 /* Enable target mode */
6298                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6299
6300                 /* Disable ini mode, if requested */
6301                 if (!qla_ini_mode_enabled(vha))
6302                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6303
6304                 /* Disable Full Login after LIP */
6305                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6306                 /* Enable initial LIP */
6307                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6308                 if (ql2xtgt_tape_enable)
6309                         /* Enable FC tape support */
6310                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6311                 else
6312                         /* Disable FC tape support */
6313                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6314
6315                 /* Disable Full Login after LIP */
6316                 nv->host_p &= cpu_to_le32(~BIT_10);
6317                 /* Enable target PRLI control */
6318                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6319         } else {
6320                 if (ha->tgt.saved_set) {
6321                         nv->exchange_count = ha->tgt.saved_exchange_count;
6322                         nv->firmware_options_1 =
6323                             ha->tgt.saved_firmware_options_1;
6324                         nv->firmware_options_2 =
6325                             ha->tgt.saved_firmware_options_2;
6326                         nv->firmware_options_3 =
6327                             ha->tgt.saved_firmware_options_3;
6328                 }
6329                 return;
6330         }
6331
6332         /* out-of-order frames reassembly */
6333         nv->firmware_options_3 |= BIT_6|BIT_9;
6334
6335         if (ha->tgt.enable_class_2) {
6336                 if (vha->flags.init_done)
6337                         fc_host_supported_classes(vha->host) =
6338                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6339
6340                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6341         } else {
6342                 if (vha->flags.init_done)
6343                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6344
6345                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6346         }
6347 }
6348
6349 void
6350 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6351         struct init_cb_81xx *icb)
6352 {
6353         struct qla_hw_data *ha = vha->hw;
6354
6355         if (!QLA_TGT_MODE_ENABLED())
6356                 return;
6357
6358         if (ha->tgt.node_name_set) {
6359                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6360                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6361         }
6362 }
6363
6364 void
6365 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6366 {
6367         if (!QLA_TGT_MODE_ENABLED())
6368                 return;
6369
6370         ha->msix_count += 1; /* For ATIO Q */
6371 }
6372
6373 int
6374 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6375         struct sts_entry_24xx *pkt)
6376 {
6377         switch (pkt->entry_type) {
6378         case ABTS_RECV_24XX:
6379         case ABTS_RESP_24XX:
6380         case CTIO_TYPE7:
6381         case NOTIFY_ACK_TYPE:
6382         case CTIO_CRC2:
6383                 return 1;
6384         default:
6385                 return 0;
6386         }
6387 }
6388
6389 void
6390 qlt_modify_vp_config(struct scsi_qla_host *vha,
6391         struct vp_config_entry_24xx *vpmod)
6392 {
6393         if (qla_tgt_mode_enabled(vha))
6394                 vpmod->options_idx1 &= ~BIT_5;
6395         /* Disable ini mode, if requested */
6396         if (!qla_ini_mode_enabled(vha))
6397                 vpmod->options_idx1 &= ~BIT_4;
6398 }
6399
6400 void
6401 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6402 {
6403         if (!QLA_TGT_MODE_ENABLED())
6404                 return;
6405
6406         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6407                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6408                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6409         } else {
6410                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6411                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6412         }
6413
6414         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6415         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6416         qlt_clear_mode(base_vha);
6417 }
6418
6419 irqreturn_t
6420 qla83xx_msix_atio_q(int irq, void *dev_id)
6421 {
6422         struct rsp_que *rsp;
6423         scsi_qla_host_t *vha;
6424         struct qla_hw_data *ha;
6425         unsigned long flags;
6426
6427         rsp = (struct rsp_que *) dev_id;
6428         ha = rsp->hw;
6429         vha = pci_get_drvdata(ha->pdev);
6430
6431         spin_lock_irqsave(&ha->hardware_lock, flags);
6432
6433         qlt_24xx_process_atio_queue(vha);
6434         qla24xx_process_response_queue(vha, rsp);
6435
6436         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6437
6438         return IRQ_HANDLED;
6439 }
6440
6441 int
6442 qlt_mem_alloc(struct qla_hw_data *ha)
6443 {
6444         if (!QLA_TGT_MODE_ENABLED())
6445                 return 0;
6446
6447         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6448             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6449         if (!ha->tgt.tgt_vp_map)
6450                 return -ENOMEM;
6451
6452         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6453             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6454             &ha->tgt.atio_dma, GFP_KERNEL);
6455         if (!ha->tgt.atio_ring) {
6456                 kfree(ha->tgt.tgt_vp_map);
6457                 return -ENOMEM;
6458         }
6459         return 0;
6460 }
6461
6462 void
6463 qlt_mem_free(struct qla_hw_data *ha)
6464 {
6465         if (!QLA_TGT_MODE_ENABLED())
6466                 return;
6467
6468         if (ha->tgt.atio_ring) {
6469                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6470                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6471                     ha->tgt.atio_dma);
6472         }
6473         kfree(ha->tgt.tgt_vp_map);
6474 }
6475
6476 /* vport_slock to be held by the caller */
6477 void
6478 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6479 {
6480         if (!QLA_TGT_MODE_ENABLED())
6481                 return;
6482
6483         switch (cmd) {
6484         case SET_VP_IDX:
6485                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6486                 break;
6487         case SET_AL_PA:
6488                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6489                 break;
6490         case RESET_VP_IDX:
6491                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6492                 break;
6493         case RESET_AL_PA:
6494                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6495                 break;
6496         }
6497 }
6498
6499 static int __init qlt_parse_ini_mode(void)
6500 {
6501         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6502                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6503         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6504                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6505         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6506                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6507         else
6508                 return false;
6509
6510         return true;
6511 }
6512
6513 int __init qlt_init(void)
6514 {
6515         int ret;
6516
6517         if (!qlt_parse_ini_mode()) {
6518                 ql_log(ql_log_fatal, NULL, 0xe06b,
6519                     "qlt_parse_ini_mode() failed\n");
6520                 return -EINVAL;
6521         }
6522
6523         if (!QLA_TGT_MODE_ENABLED())
6524                 return 0;
6525
6526         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6527             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6528             qla_tgt_mgmt_cmd), 0, NULL);
6529         if (!qla_tgt_mgmt_cmd_cachep) {
6530                 ql_log(ql_log_fatal, NULL, 0xe06d,
6531                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6532                 return -ENOMEM;
6533         }
6534
6535         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6536             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6537         if (!qla_tgt_mgmt_cmd_mempool) {
6538                 ql_log(ql_log_fatal, NULL, 0xe06e,
6539                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6540                 ret = -ENOMEM;
6541                 goto out_mgmt_cmd_cachep;
6542         }
6543
6544         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6545         if (!qla_tgt_wq) {
6546                 ql_log(ql_log_fatal, NULL, 0xe06f,
6547                     "alloc_workqueue for qla_tgt_wq failed\n");
6548                 ret = -ENOMEM;
6549                 goto out_cmd_mempool;
6550         }
6551         /*
6552          * Return 1 to signal that initiator-mode is being disabled
6553          */
6554         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6555
6556 out_cmd_mempool:
6557         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6558 out_mgmt_cmd_cachep:
6559         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6560         return ret;
6561 }
6562
6563 void qlt_exit(void)
6564 {
6565         if (!QLA_TGT_MODE_ENABLED())
6566                 return;
6567
6568         destroy_workqueue(qla_tgt_wq);
6569         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6570         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6571 }