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                         __constant_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 = __constant_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 = __constant_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 =
1284             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1285                 CTIO7_FLAGS_TERMINATE);
1286         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1287
1288         /* Memory Barrier */
1289         wmb();
1290         qla2x00_start_iocbs(vha, vha->req);
1291
1292         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1293             FCP_TMF_CMPL, true);
1294 }
1295
1296 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1297 {
1298         struct qla_tgt_sess_op *op;
1299         struct qla_tgt_cmd *cmd;
1300
1301         spin_lock(&vha->cmd_list_lock);
1302
1303         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1304                 if (tag == op->atio.u.isp24.exchange_addr) {
1305                         op->aborted = true;
1306                         spin_unlock(&vha->cmd_list_lock);
1307                         return 1;
1308                 }
1309         }
1310
1311         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1312                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1313                         cmd->state = QLA_TGT_STATE_ABORTED;
1314                         spin_unlock(&vha->cmd_list_lock);
1315                         return 1;
1316                 }
1317         }
1318
1319         spin_unlock(&vha->cmd_list_lock);
1320         return 0;
1321 }
1322
1323 /* drop cmds for the given lun
1324  * XXX only looks for cmds on the port through which lun reset was recieved
1325  * XXX does not go through the list of other port (which may have cmds
1326  *     for the same lun)
1327  */
1328 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1329                                 uint32_t lun, uint8_t *s_id)
1330 {
1331         struct qla_tgt_sess_op *op;
1332         struct qla_tgt_cmd *cmd;
1333         uint32_t key;
1334
1335         key = sid_to_key(s_id);
1336         spin_lock(&vha->cmd_list_lock);
1337         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1338                 uint32_t op_key;
1339                 uint32_t op_lun;
1340
1341                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1342                 op_lun = scsilun_to_int(
1343                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1344                 if (op_key == key && op_lun == lun)
1345                         op->aborted = true;
1346         }
1347         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1348                 uint32_t cmd_key;
1349                 uint32_t cmd_lun;
1350
1351                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1352                 cmd_lun = scsilun_to_int(
1353                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1354                 if (cmd_key == key && cmd_lun == lun)
1355                         cmd->state = QLA_TGT_STATE_ABORTED;
1356         }
1357         spin_unlock(&vha->cmd_list_lock);
1358 }
1359
1360 /* ha->hardware_lock supposed to be held on entry */
1361 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1362         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1363 {
1364         struct qla_hw_data *ha = vha->hw;
1365         struct se_session *se_sess = sess->se_sess;
1366         struct qla_tgt_mgmt_cmd *mcmd;
1367         struct se_cmd *se_cmd;
1368         u32 lun = 0;
1369         int rc;
1370         bool found_lun = false;
1371
1372         spin_lock(&se_sess->sess_cmd_lock);
1373         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1374                 struct qla_tgt_cmd *cmd =
1375                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1376                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1377                         lun = cmd->unpacked_lun;
1378                         found_lun = true;
1379                         break;
1380                 }
1381         }
1382         spin_unlock(&se_sess->sess_cmd_lock);
1383
1384         /* cmd not in LIO lists, look in qla list */
1385         if (!found_lun) {
1386                 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1387                         /* send TASK_ABORT response immediately */
1388                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1389                         return 0;
1390                 } else {
1391                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1392                             "unable to find cmd in driver or LIO for tag 0x%x\n",
1393                             abts->exchange_addr_to_abort);
1394                         return -ENOENT;
1395                 }
1396         }
1397
1398         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1399             "qla_target(%d): task abort (tag=%d)\n",
1400             vha->vp_idx, abts->exchange_addr_to_abort);
1401
1402         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1403         if (mcmd == NULL) {
1404                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1405                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1406                     vha->vp_idx, __func__);
1407                 return -ENOMEM;
1408         }
1409         memset(mcmd, 0, sizeof(*mcmd));
1410
1411         mcmd->sess = sess;
1412         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1413         mcmd->reset_count = vha->hw->chip_reset;
1414
1415         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1416             abts->exchange_addr_to_abort);
1417         if (rc != 0) {
1418                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1419                     "qla_target(%d):  tgt_ops->handle_tmr()"
1420                     " failed: %d", vha->vp_idx, rc);
1421                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1422                 return -EFAULT;
1423         }
1424
1425         return 0;
1426 }
1427
1428 /*
1429  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1430  */
1431 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1432         struct abts_recv_from_24xx *abts)
1433 {
1434         struct qla_hw_data *ha = vha->hw;
1435         struct qla_tgt_sess *sess;
1436         uint32_t tag = abts->exchange_addr_to_abort;
1437         uint8_t s_id[3];
1438         int rc;
1439
1440         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1441                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1442                     "qla_target(%d): ABTS: Abort Sequence not "
1443                     "supported\n", vha->vp_idx);
1444                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1445                 return;
1446         }
1447
1448         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1449                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1450                     "qla_target(%d): ABTS: Unknown Exchange "
1451                     "Address received\n", vha->vp_idx);
1452                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1453                 return;
1454         }
1455
1456         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1457             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1458             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1459             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1460             le32_to_cpu(abts->fcp_hdr_le.parameter));
1461
1462         s_id[0] = abts->fcp_hdr_le.s_id[2];
1463         s_id[1] = abts->fcp_hdr_le.s_id[1];
1464         s_id[2] = abts->fcp_hdr_le.s_id[0];
1465
1466         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1467         if (!sess) {
1468                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1469                     "qla_target(%d): task abort for non-existant session\n",
1470                     vha->vp_idx);
1471                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1472                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1473                 if (rc != 0) {
1474                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1475                             false);
1476                 }
1477                 return;
1478         }
1479
1480         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1481                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1482                 return;
1483         }
1484
1485         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1486         if (rc != 0) {
1487                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1488                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1489                     vha->vp_idx, rc);
1490                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1491                 return;
1492         }
1493 }
1494
1495 /*
1496  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1497  */
1498 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1499         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1500 {
1501         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1502         struct ctio7_to_24xx *ctio;
1503         uint16_t temp;
1504
1505         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1506             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1507             ha, atio, resp_code);
1508
1509         /* Send marker if required */
1510         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1511                 return;
1512
1513         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1514         if (ctio == NULL) {
1515                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1516                     "qla_target(%d): %s failed: unable to allocate "
1517                     "request packet\n", ha->vp_idx, __func__);
1518                 return;
1519         }
1520
1521         ctio->entry_type = CTIO_TYPE7;
1522         ctio->entry_count = 1;
1523         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1524         ctio->nport_handle = mcmd->sess->loop_id;
1525         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1526         ctio->vp_index = ha->vp_idx;
1527         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1528         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1529         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1530         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1531         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1532             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1533                 CTIO7_FLAGS_SEND_STATUS);
1534         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1535         ctio->u.status1.ox_id = cpu_to_le16(temp);
1536         ctio->u.status1.scsi_status =
1537             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1538         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1539         ctio->u.status1.sense_data[0] = resp_code;
1540
1541         /* Memory Barrier */
1542         wmb();
1543         qla2x00_start_iocbs(ha, ha->req);
1544 }
1545
1546 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1547 {
1548         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1549 }
1550 EXPORT_SYMBOL(qlt_free_mcmd);
1551
1552 /* callback from target fabric module code */
1553 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1554 {
1555         struct scsi_qla_host *vha = mcmd->sess->vha;
1556         struct qla_hw_data *ha = vha->hw;
1557         unsigned long flags;
1558
1559         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1560             "TM response mcmd (%p) status %#x state %#x",
1561             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1562
1563         spin_lock_irqsave(&ha->hardware_lock, flags);
1564
1565         if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1566                 /*
1567                  * Either a chip reset is active or this request was from
1568                  * previous life, just abort the processing.
1569                  */
1570                 ql_dbg(ql_dbg_async, vha, 0xe100,
1571                         "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1572                         qla2x00_reset_active(vha), mcmd->reset_count,
1573                         ha->chip_reset);
1574                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1575                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1576                 return;
1577         }
1578
1579         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1580                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1581                     0, 0, 0, 0, 0, 0);
1582         else {
1583                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1584                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1585                             mcmd->fc_tm_rsp, false);
1586                 else
1587                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1588                             mcmd->fc_tm_rsp);
1589         }
1590         /*
1591          * Make the callback for ->free_mcmd() to queue_work() and invoke
1592          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1593          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1594          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1595          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1596          * qlt_xmit_tm_rsp() returns here..
1597          */
1598         ha->tgt.tgt_ops->free_mcmd(mcmd);
1599         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1600 }
1601 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1602
1603 /* No locks */
1604 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1605 {
1606         struct qla_tgt_cmd *cmd = prm->cmd;
1607
1608         BUG_ON(cmd->sg_cnt == 0);
1609
1610         prm->sg = (struct scatterlist *)cmd->sg;
1611         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1612             cmd->sg_cnt, cmd->dma_data_direction);
1613         if (unlikely(prm->seg_cnt == 0))
1614                 goto out_err;
1615
1616         prm->cmd->sg_mapped = 1;
1617
1618         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1619                 /*
1620                  * If greater than four sg entries then we need to allocate
1621                  * the continuation entries
1622                  */
1623                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1624                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1625                         prm->tgt->datasegs_per_cmd,
1626                         prm->tgt->datasegs_per_cont);
1627         } else {
1628                 /* DIF */
1629                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1630                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1631                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1632                         prm->tot_dsds = prm->seg_cnt;
1633                 } else
1634                         prm->tot_dsds = prm->seg_cnt;
1635
1636                 if (cmd->prot_sg_cnt) {
1637                         prm->prot_sg      = cmd->prot_sg;
1638                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1639                                 cmd->prot_sg, cmd->prot_sg_cnt,
1640                                 cmd->dma_data_direction);
1641                         if (unlikely(prm->prot_seg_cnt == 0))
1642                                 goto out_err;
1643
1644                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1645                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1646                                 /* Dif Bundling not support here */
1647                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1648                                                                 cmd->blk_sz);
1649                                 prm->tot_dsds += prm->prot_seg_cnt;
1650                         } else
1651                                 prm->tot_dsds += prm->prot_seg_cnt;
1652                 }
1653         }
1654
1655         return 0;
1656
1657 out_err:
1658         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1659             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1660             0, prm->cmd->sg_cnt);
1661         return -1;
1662 }
1663
1664 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1665 {
1666         struct qla_hw_data *ha = vha->hw;
1667
1668         if (!cmd->sg_mapped)
1669                 return;
1670
1671         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1672         cmd->sg_mapped = 0;
1673
1674         if (cmd->prot_sg_cnt)
1675                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1676                         cmd->dma_data_direction);
1677
1678         if (cmd->ctx_dsd_alloced)
1679                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1680
1681         if (cmd->ctx)
1682                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1683 }
1684
1685 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1686         uint32_t req_cnt)
1687 {
1688         uint32_t cnt, cnt_in;
1689
1690         if (vha->req->cnt < (req_cnt + 2)) {
1691                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1692                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1693
1694                 if  (vha->req->ring_index < cnt)
1695                         vha->req->cnt = cnt - vha->req->ring_index;
1696                 else
1697                         vha->req->cnt = vha->req->length -
1698                             (vha->req->ring_index - cnt);
1699         }
1700
1701         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1702                 ql_dbg(ql_dbg_io, vha, 0x305a,
1703                     "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",
1704                     vha->vp_idx, vha->req->ring_index,
1705                     vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1706                 return -EAGAIN;
1707         }
1708         vha->req->cnt -= req_cnt;
1709
1710         return 0;
1711 }
1712
1713 /*
1714  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1715  */
1716 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1717 {
1718         /* Adjust ring index. */
1719         vha->req->ring_index++;
1720         if (vha->req->ring_index == vha->req->length) {
1721                 vha->req->ring_index = 0;
1722                 vha->req->ring_ptr = vha->req->ring;
1723         } else {
1724                 vha->req->ring_ptr++;
1725         }
1726         return (cont_entry_t *)vha->req->ring_ptr;
1727 }
1728
1729 /* ha->hardware_lock supposed to be held on entry */
1730 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1731 {
1732         struct qla_hw_data *ha = vha->hw;
1733         uint32_t h;
1734
1735         h = ha->tgt.current_handle;
1736         /* always increment cmd handle */
1737         do {
1738                 ++h;
1739                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1740                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1741                 if (h == ha->tgt.current_handle) {
1742                         ql_dbg(ql_dbg_io, vha, 0x305b,
1743                             "qla_target(%d): Ran out of "
1744                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1745                         h = QLA_TGT_NULL_HANDLE;
1746                         break;
1747                 }
1748         } while ((h == QLA_TGT_NULL_HANDLE) ||
1749             (h == QLA_TGT_SKIP_HANDLE) ||
1750             (ha->tgt.cmds[h-1] != NULL));
1751
1752         if (h != QLA_TGT_NULL_HANDLE)
1753                 ha->tgt.current_handle = h;
1754
1755         return h;
1756 }
1757
1758 /* ha->hardware_lock supposed to be held on entry */
1759 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1760         struct scsi_qla_host *vha)
1761 {
1762         uint32_t h;
1763         struct ctio7_to_24xx *pkt;
1764         struct qla_hw_data *ha = vha->hw;
1765         struct atio_from_isp *atio = &prm->cmd->atio;
1766         uint16_t temp;
1767
1768         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1769         prm->pkt = pkt;
1770         memset(pkt, 0, sizeof(*pkt));
1771
1772         pkt->entry_type = CTIO_TYPE7;
1773         pkt->entry_count = (uint8_t)prm->req_cnt;
1774         pkt->vp_index = vha->vp_idx;
1775
1776         h = qlt_make_handle(vha);
1777         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1778                 /*
1779                  * CTIO type 7 from the firmware doesn't provide a way to
1780                  * know the initiator's LOOP ID, hence we can't find
1781                  * the session and, so, the command.
1782                  */
1783                 return -EAGAIN;
1784         } else
1785                 ha->tgt.cmds[h-1] = prm->cmd;
1786
1787         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1788         pkt->nport_handle = prm->cmd->loop_id;
1789         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1790         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1791         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1792         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1793         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1794         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1795         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1796         pkt->u.status0.ox_id = cpu_to_le16(temp);
1797         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1798
1799         return 0;
1800 }
1801
1802 /*
1803  * ha->hardware_lock supposed to be held on entry. We have already made sure
1804  * that there is sufficient amount of request entries to not drop it.
1805  */
1806 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1807         struct scsi_qla_host *vha)
1808 {
1809         int cnt;
1810         uint32_t *dword_ptr;
1811         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1812
1813         /* Build continuation packets */
1814         while (prm->seg_cnt > 0) {
1815                 cont_a64_entry_t *cont_pkt64 =
1816                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1817
1818                 /*
1819                  * Make sure that from cont_pkt64 none of
1820                  * 64-bit specific fields used for 32-bit
1821                  * addressing. Cast to (cont_entry_t *) for
1822                  * that.
1823                  */
1824
1825                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1826
1827                 cont_pkt64->entry_count = 1;
1828                 cont_pkt64->sys_define = 0;
1829
1830                 if (enable_64bit_addressing) {
1831                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1832                         dword_ptr =
1833                             (uint32_t *)&cont_pkt64->dseg_0_address;
1834                 } else {
1835                         cont_pkt64->entry_type = CONTINUE_TYPE;
1836                         dword_ptr =
1837                             (uint32_t *)&((cont_entry_t *)
1838                                 cont_pkt64)->dseg_0_address;
1839                 }
1840
1841                 /* Load continuation entry data segments */
1842                 for (cnt = 0;
1843                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1844                     cnt++, prm->seg_cnt--) {
1845                         *dword_ptr++ =
1846                             cpu_to_le32(pci_dma_lo32
1847                                 (sg_dma_address(prm->sg)));
1848                         if (enable_64bit_addressing) {
1849                                 *dword_ptr++ =
1850                                     cpu_to_le32(pci_dma_hi32
1851                                         (sg_dma_address
1852                                         (prm->sg)));
1853                         }
1854                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1855
1856                         prm->sg = sg_next(prm->sg);
1857                 }
1858         }
1859 }
1860
1861 /*
1862  * ha->hardware_lock supposed to be held on entry. We have already made sure
1863  * that there is sufficient amount of request entries to not drop it.
1864  */
1865 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1866         struct scsi_qla_host *vha)
1867 {
1868         int cnt;
1869         uint32_t *dword_ptr;
1870         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1871         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1872
1873         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1874
1875         /* Setup packet address segment pointer */
1876         dword_ptr = pkt24->u.status0.dseg_0_address;
1877
1878         /* Set total data segment count */
1879         if (prm->seg_cnt)
1880                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1881
1882         if (prm->seg_cnt == 0) {
1883                 /* No data transfer */
1884                 *dword_ptr++ = 0;
1885                 *dword_ptr = 0;
1886                 return;
1887         }
1888
1889         /* If scatter gather */
1890
1891         /* Load command entry data segments */
1892         for (cnt = 0;
1893             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1894             cnt++, prm->seg_cnt--) {
1895                 *dword_ptr++ =
1896                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1897                 if (enable_64bit_addressing) {
1898                         *dword_ptr++ =
1899                             cpu_to_le32(pci_dma_hi32(
1900                                 sg_dma_address(prm->sg)));
1901                 }
1902                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1903
1904                 prm->sg = sg_next(prm->sg);
1905         }
1906
1907         qlt_load_cont_data_segments(prm, vha);
1908 }
1909
1910 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1911 {
1912         return cmd->bufflen > 0;
1913 }
1914
1915 /*
1916  * Called without ha->hardware_lock held
1917  */
1918 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1919         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1920         uint32_t *full_req_cnt)
1921 {
1922         struct qla_tgt *tgt = cmd->tgt;
1923         struct scsi_qla_host *vha = tgt->vha;
1924         struct qla_hw_data *ha = vha->hw;
1925         struct se_cmd *se_cmd = &cmd->se_cmd;
1926
1927         if (unlikely(cmd->aborted)) {
1928                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1929                        "qla_target(%d): terminating exchange for aborted cmd=%p (se_cmd=%p, tag=%lld)",
1930                        vha->vp_idx, cmd, se_cmd, se_cmd->tag);
1931
1932                 cmd->state = QLA_TGT_STATE_ABORTED;
1933                 cmd->cmd_flags |= BIT_6;
1934
1935                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1936
1937                 /* !! At this point cmd could be already freed !! */
1938                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1939         }
1940
1941         prm->cmd = cmd;
1942         prm->tgt = tgt;
1943         prm->rq_result = scsi_status;
1944         prm->sense_buffer = &cmd->sense_buffer[0];
1945         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1946         prm->sg = NULL;
1947         prm->seg_cnt = -1;
1948         prm->req_cnt = 1;
1949         prm->add_status_pkt = 0;
1950
1951         /* Send marker if required */
1952         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1953                 return -EFAULT;
1954
1955         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1956                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1957                         return -EAGAIN;
1958         }
1959
1960         *full_req_cnt = prm->req_cnt;
1961
1962         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1963                 prm->residual = se_cmd->residual_count;
1964                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1965                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1966                        prm->residual, se_cmd->tag,
1967                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1968                        cmd->bufflen, prm->rq_result);
1969                 prm->rq_result |= SS_RESIDUAL_UNDER;
1970         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1971                 prm->residual = se_cmd->residual_count;
1972                 ql_dbg(ql_dbg_io, vha, 0x305d,
1973                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1974                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
1975                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
1976                 prm->rq_result |= SS_RESIDUAL_OVER;
1977         }
1978
1979         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1980                 /*
1981                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1982                  * ignored in *xmit_response() below
1983                  */
1984                 if (qlt_has_data(cmd)) {
1985                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1986                             (IS_FWI2_CAPABLE(ha) &&
1987                             (prm->rq_result != 0))) {
1988                                 prm->add_status_pkt = 1;
1989                                 (*full_req_cnt)++;
1990                         }
1991                 }
1992         }
1993
1994         return 0;
1995 }
1996
1997 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1998         struct qla_tgt_cmd *cmd, int sending_sense)
1999 {
2000         if (ha->tgt.enable_class_2)
2001                 return 0;
2002
2003         if (sending_sense)
2004                 return cmd->conf_compl_supported;
2005         else
2006                 return ha->tgt.enable_explicit_conf &&
2007                     cmd->conf_compl_supported;
2008 }
2009
2010 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
2011 /*
2012  *  Original taken from the XFS code
2013  */
2014 static unsigned long qlt_srr_random(void)
2015 {
2016         static int Inited;
2017         static unsigned long RandomValue;
2018         static DEFINE_SPINLOCK(lock);
2019         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2020         register long rv;
2021         register long lo;
2022         register long hi;
2023         unsigned long flags;
2024
2025         spin_lock_irqsave(&lock, flags);
2026         if (!Inited) {
2027                 RandomValue = jiffies;
2028                 Inited = 1;
2029         }
2030         rv = RandomValue;
2031         hi = rv / 127773;
2032         lo = rv % 127773;
2033         rv = 16807 * lo - 2836 * hi;
2034         if (rv <= 0)
2035                 rv += 2147483647;
2036         RandomValue = rv;
2037         spin_unlock_irqrestore(&lock, flags);
2038         return rv;
2039 }
2040
2041 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2042 {
2043 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2044         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2045             == 50) {
2046                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2047                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2048                     "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2049         }
2050 #endif
2051         /*
2052          * It's currently not possible to simulate SRRs for FCP_WRITE without
2053          * a physical link layer failure, so don't even try here..
2054          */
2055         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2056                 return;
2057
2058         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2059             ((qlt_srr_random() % 100) == 20)) {
2060                 int i, leave = 0;
2061                 unsigned int tot_len = 0;
2062
2063                 while (leave == 0)
2064                         leave = qlt_srr_random() % cmd->sg_cnt;
2065
2066                 for (i = 0; i < leave; i++)
2067                         tot_len += cmd->sg[i].length;
2068
2069                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2070                     "Cutting cmd %p (tag %d) buffer"
2071                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2072                     " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2073                     cmd->bufflen, cmd->sg_cnt);
2074
2075                 cmd->bufflen = tot_len;
2076                 cmd->sg_cnt = leave;
2077         }
2078
2079         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2080                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2081
2082                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2083                     "Cutting cmd %p (tag %d) buffer head "
2084                     "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2085                     cmd->bufflen);
2086                 if (offset == 0)
2087                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
2088                 else if (qlt_set_data_offset(cmd, offset)) {
2089                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2090                             "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2091                 }
2092         }
2093 }
2094 #else
2095 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2096 {}
2097 #endif
2098
2099 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2100         struct qla_tgt_prm *prm)
2101 {
2102         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2103             (uint32_t)sizeof(ctio->u.status1.sense_data));
2104         ctio->u.status0.flags |=
2105             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2106         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2107                 ctio->u.status0.flags |= __constant_cpu_to_le16(
2108                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2109                     CTIO7_FLAGS_CONFORM_REQ);
2110         }
2111         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2112         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2113         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2114                 int i;
2115
2116                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2117                         if (prm->cmd->se_cmd.scsi_status != 0) {
2118                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2119                                     "Skipping EXPLICIT_CONFORM and "
2120                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2121                                     "non GOOD status\n");
2122                                 goto skip_explict_conf;
2123                         }
2124                         ctio->u.status1.flags |= __constant_cpu_to_le16(
2125                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2126                             CTIO7_FLAGS_CONFORM_REQ);
2127                 }
2128 skip_explict_conf:
2129                 ctio->u.status1.flags &=
2130                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2131                 ctio->u.status1.flags |=
2132                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2133                 ctio->u.status1.scsi_status |=
2134                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
2135                 ctio->u.status1.sense_length =
2136                     cpu_to_le16(prm->sense_buffer_len);
2137                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2138                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2139                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2140 #if 0
2141                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2142                         static int q;
2143                         if (q < 10) {
2144                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2145                                     "qla_target(%d): %d bytes of sense "
2146                                     "lost", prm->tgt->ha->vp_idx,
2147                                     prm->sense_buffer_len % 4);
2148                                 q++;
2149                         }
2150                 }
2151 #endif
2152         } else {
2153                 ctio->u.status1.flags &=
2154                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2155                 ctio->u.status1.flags |=
2156                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2157                 ctio->u.status1.sense_length = 0;
2158                 memset(ctio->u.status1.sense_data, 0,
2159                     sizeof(ctio->u.status1.sense_data));
2160         }
2161
2162         /* Sense with len > 24, is it possible ??? */
2163 }
2164
2165
2166
2167 /* diff  */
2168 static inline int
2169 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2170 {
2171         /*
2172          * Uncomment when corresponding SCSI changes are done.
2173          *
2174          if (!sp->cmd->prot_chk)
2175          return 0;
2176          *
2177          */
2178         switch (se_cmd->prot_op) {
2179         case TARGET_PROT_DOUT_INSERT:
2180         case TARGET_PROT_DIN_STRIP:
2181                 if (ql2xenablehba_err_chk >= 1)
2182                         return 1;
2183                 break;
2184         case TARGET_PROT_DOUT_PASS:
2185         case TARGET_PROT_DIN_PASS:
2186                 if (ql2xenablehba_err_chk >= 2)
2187                         return 1;
2188                 break;
2189         case TARGET_PROT_DIN_INSERT:
2190         case TARGET_PROT_DOUT_STRIP:
2191                 return 1;
2192         default:
2193                 break;
2194         }
2195         return 0;
2196 }
2197
2198 /*
2199  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2200  *
2201  */
2202 static inline void
2203 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2204 {
2205         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2206
2207         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2208          * have been immplemented by TCM, before AppTag is avail.
2209          * Look for modesense_handlers[]
2210          */
2211         ctx->app_tag = 0;
2212         ctx->app_tag_mask[0] = 0x0;
2213         ctx->app_tag_mask[1] = 0x0;
2214
2215         switch (se_cmd->prot_type) {
2216         case TARGET_DIF_TYPE0_PROT:
2217                 /*
2218                  * No check for ql2xenablehba_err_chk, as it would be an
2219                  * I/O error if hba tag generation is not done.
2220                  */
2221                 ctx->ref_tag = cpu_to_le32(lba);
2222
2223                 if (!qlt_hba_err_chk_enabled(se_cmd))
2224                         break;
2225
2226                 /* enable ALL bytes of the ref tag */
2227                 ctx->ref_tag_mask[0] = 0xff;
2228                 ctx->ref_tag_mask[1] = 0xff;
2229                 ctx->ref_tag_mask[2] = 0xff;
2230                 ctx->ref_tag_mask[3] = 0xff;
2231                 break;
2232         /*
2233          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2234          * 16 bit app tag.
2235          */
2236         case TARGET_DIF_TYPE1_PROT:
2237                 ctx->ref_tag = cpu_to_le32(lba);
2238
2239                 if (!qlt_hba_err_chk_enabled(se_cmd))
2240                         break;
2241
2242                 /* enable ALL bytes of the ref tag */
2243                 ctx->ref_tag_mask[0] = 0xff;
2244                 ctx->ref_tag_mask[1] = 0xff;
2245                 ctx->ref_tag_mask[2] = 0xff;
2246                 ctx->ref_tag_mask[3] = 0xff;
2247                 break;
2248         /*
2249          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2250          * match LBA in CDB + N
2251          */
2252         case TARGET_DIF_TYPE2_PROT:
2253                 ctx->ref_tag = cpu_to_le32(lba);
2254
2255                 if (!qlt_hba_err_chk_enabled(se_cmd))
2256                         break;
2257
2258                 /* enable ALL bytes of the ref tag */
2259                 ctx->ref_tag_mask[0] = 0xff;
2260                 ctx->ref_tag_mask[1] = 0xff;
2261                 ctx->ref_tag_mask[2] = 0xff;
2262                 ctx->ref_tag_mask[3] = 0xff;
2263                 break;
2264
2265         /* For Type 3 protection: 16 bit GUARD only */
2266         case TARGET_DIF_TYPE3_PROT:
2267                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2268                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2269                 break;
2270         }
2271 }
2272
2273
2274 static inline int
2275 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2276 {
2277         uint32_t                *cur_dsd;
2278         int                     sgc;
2279         uint32_t                transfer_length = 0;
2280         uint32_t                data_bytes;
2281         uint32_t                dif_bytes;
2282         uint8_t                 bundling = 1;
2283         uint8_t                 *clr_ptr;
2284         struct crc_context      *crc_ctx_pkt = NULL;
2285         struct qla_hw_data      *ha;
2286         struct ctio_crc2_to_fw  *pkt;
2287         dma_addr_t              crc_ctx_dma;
2288         uint16_t                fw_prot_opts = 0;
2289         struct qla_tgt_cmd      *cmd = prm->cmd;
2290         struct se_cmd           *se_cmd = &cmd->se_cmd;
2291         uint32_t h;
2292         struct atio_from_isp *atio = &prm->cmd->atio;
2293         uint16_t t16;
2294
2295         sgc = 0;
2296         ha = vha->hw;
2297
2298         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2299         prm->pkt = pkt;
2300         memset(pkt, 0, sizeof(*pkt));
2301
2302         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2303                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2304                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2305                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2306
2307         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2308             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2309                 bundling = 0;
2310
2311         /* Compute dif len and adjust data len to incude protection */
2312         data_bytes = cmd->bufflen;
2313         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2314
2315         switch (se_cmd->prot_op) {
2316         case TARGET_PROT_DIN_INSERT:
2317         case TARGET_PROT_DOUT_STRIP:
2318                 transfer_length = data_bytes;
2319                 data_bytes += dif_bytes;
2320                 break;
2321
2322         case TARGET_PROT_DIN_STRIP:
2323         case TARGET_PROT_DOUT_INSERT:
2324         case TARGET_PROT_DIN_PASS:
2325         case TARGET_PROT_DOUT_PASS:
2326                 transfer_length = data_bytes + dif_bytes;
2327                 break;
2328
2329         default:
2330                 BUG();
2331                 break;
2332         }
2333
2334         if (!qlt_hba_err_chk_enabled(se_cmd))
2335                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2336         /* HBA error checking enabled */
2337         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2338                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2339                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2340                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2341                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2342                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2343         }
2344
2345         switch (se_cmd->prot_op) {
2346         case TARGET_PROT_DIN_INSERT:
2347         case TARGET_PROT_DOUT_INSERT:
2348                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2349                 break;
2350         case TARGET_PROT_DIN_STRIP:
2351         case TARGET_PROT_DOUT_STRIP:
2352                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2353                 break;
2354         case TARGET_PROT_DIN_PASS:
2355         case TARGET_PROT_DOUT_PASS:
2356                 fw_prot_opts |= PO_MODE_DIF_PASS;
2357                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2358                 break;
2359         default:/* Normal Request */
2360                 fw_prot_opts |= PO_MODE_DIF_PASS;
2361                 break;
2362         }
2363
2364
2365         /* ---- PKT ---- */
2366         /* Update entry type to indicate Command Type CRC_2 IOCB */
2367         pkt->entry_type  = CTIO_CRC2;
2368         pkt->entry_count = 1;
2369         pkt->vp_index = vha->vp_idx;
2370
2371         h = qlt_make_handle(vha);
2372         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2373                 /*
2374                  * CTIO type 7 from the firmware doesn't provide a way to
2375                  * know the initiator's LOOP ID, hence we can't find
2376                  * the session and, so, the command.
2377                  */
2378                 return -EAGAIN;
2379         } else
2380                 ha->tgt.cmds[h-1] = prm->cmd;
2381
2382
2383         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2384         pkt->nport_handle = prm->cmd->loop_id;
2385         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2386         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2387         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2388         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2389         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2390
2391         /* silence compile warning */
2392         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2393         pkt->ox_id  = cpu_to_le16(t16);
2394
2395         t16 = (atio->u.isp24.attr << 9);
2396         pkt->flags |= cpu_to_le16(t16);
2397         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2398
2399         /* Set transfer direction */
2400         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2401                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2402         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2403                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2404
2405
2406         pkt->dseg_count = prm->tot_dsds;
2407         /* Fibre channel byte count */
2408         pkt->transfer_length = cpu_to_le32(transfer_length);
2409
2410
2411         /* ----- CRC context -------- */
2412
2413         /* Allocate CRC context from global pool */
2414         crc_ctx_pkt = cmd->ctx =
2415             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2416
2417         if (!crc_ctx_pkt)
2418                 goto crc_queuing_error;
2419
2420         /* Zero out CTX area. */
2421         clr_ptr = (uint8_t *)crc_ctx_pkt;
2422         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2423
2424         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2425         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2426
2427         /* Set handle */
2428         crc_ctx_pkt->handle = pkt->handle;
2429
2430         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2431
2432         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2433         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2434         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2435
2436
2437         if (!bundling) {
2438                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2439         } else {
2440                 /*
2441                  * Configure Bundling if we need to fetch interlaving
2442                  * protection PCI accesses
2443                  */
2444                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2445                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2446                 crc_ctx_pkt->u.bundling.dseg_count =
2447                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2448                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2449         }
2450
2451         /* Finish the common fields of CRC pkt */
2452         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2453         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2454         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2455         crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2456
2457
2458         /* Walks data segments */
2459         pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2460
2461         if (!bundling && prm->prot_seg_cnt) {
2462                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2463                         prm->tot_dsds, cmd))
2464                         goto crc_queuing_error;
2465         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2466                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2467                 goto crc_queuing_error;
2468
2469         if (bundling && prm->prot_seg_cnt) {
2470                 /* Walks dif segments */
2471                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2472
2473                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2474                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2475                         prm->prot_seg_cnt, cmd))
2476                         goto crc_queuing_error;
2477         }
2478         return QLA_SUCCESS;
2479
2480 crc_queuing_error:
2481         /* Cleanup will be performed by the caller */
2482
2483         return QLA_FUNCTION_FAILED;
2484 }
2485
2486
2487 /*
2488  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2489  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2490  */
2491 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2492         uint8_t scsi_status)
2493 {
2494         struct scsi_qla_host *vha = cmd->vha;
2495         struct qla_hw_data *ha = vha->hw;
2496         struct ctio7_to_24xx *pkt;
2497         struct qla_tgt_prm prm;
2498         uint32_t full_req_cnt = 0;
2499         unsigned long flags = 0;
2500         int res;
2501
2502         spin_lock_irqsave(&ha->hardware_lock, flags);
2503         if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2504                 cmd->state = QLA_TGT_STATE_PROCESSED;
2505                 if (cmd->sess->logout_completed)
2506                         /* no need to terminate. FW already freed exchange. */
2507                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2508                 else
2509                         qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2510                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2511                 return 0;
2512         }
2513         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2514
2515         memset(&prm, 0, sizeof(prm));
2516         qlt_check_srr_debug(cmd, &xmit_type);
2517
2518         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2519             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2520             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2521             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2522             &cmd->se_cmd);
2523
2524         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2525             &full_req_cnt);
2526         if (unlikely(res != 0)) {
2527                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2528                         return 0;
2529
2530                 return res;
2531         }
2532
2533         spin_lock_irqsave(&ha->hardware_lock, flags);
2534
2535         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2536                 /*
2537                  * Either a chip reset is active or this request was from
2538                  * previous life, just abort the processing.
2539                  */
2540                 cmd->state = QLA_TGT_STATE_PROCESSED;
2541                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2542                 ql_dbg(ql_dbg_async, vha, 0xe101,
2543                         "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2544                         qla2x00_reset_active(vha), cmd->reset_count,
2545                         ha->chip_reset);
2546                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2547                 return 0;
2548         }
2549
2550         /* Does F/W have an IOCBs for this request */
2551         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2552         if (unlikely(res))
2553                 goto out_unmap_unlock;
2554
2555         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2556                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2557         else
2558                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2559         if (unlikely(res != 0)) {
2560                 vha->req->cnt += full_req_cnt;
2561                 goto out_unmap_unlock;
2562         }
2563
2564         pkt = (struct ctio7_to_24xx *)prm.pkt;
2565
2566         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2567                 pkt->u.status0.flags |=
2568                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2569                         CTIO7_FLAGS_STATUS_MODE_0);
2570
2571                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2572                         qlt_load_data_segments(&prm, vha);
2573
2574                 if (prm.add_status_pkt == 0) {
2575                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2576                                 pkt->u.status0.scsi_status =
2577                                     cpu_to_le16(prm.rq_result);
2578                                 pkt->u.status0.residual =
2579                                     cpu_to_le32(prm.residual);
2580                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2581                                     CTIO7_FLAGS_SEND_STATUS);
2582                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2583                                         pkt->u.status0.flags |=
2584                                             __constant_cpu_to_le16(
2585                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2586                                                 CTIO7_FLAGS_CONFORM_REQ);
2587                                 }
2588                         }
2589
2590                 } else {
2591                         /*
2592                          * We have already made sure that there is sufficient
2593                          * amount of request entries to not drop HW lock in
2594                          * req_pkt().
2595                          */
2596                         struct ctio7_to_24xx *ctio =
2597                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2598
2599                         ql_dbg(ql_dbg_io, vha, 0x305e,
2600                             "Building additional status packet 0x%p.\n",
2601                             ctio);
2602
2603                         /*
2604                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2605                          * ctio7_to_24xx
2606                          */
2607                         memcpy(ctio, pkt, sizeof(*ctio));
2608                         /* reset back to CTIO7 */
2609                         ctio->entry_count = 1;
2610                         ctio->entry_type = CTIO_TYPE7;
2611                         ctio->dseg_count = 0;
2612                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2613                             CTIO7_FLAGS_DATA_IN);
2614
2615                         /* Real finish is ctio_m1's finish */
2616                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2617                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2618                             CTIO7_FLAGS_DONT_RET_CTIO);
2619
2620                         /* qlt_24xx_init_ctio_to_isp will correct
2621                          * all neccessary fields that's part of CTIO7.
2622                          * There should be no residual of CTIO-CRC2 data.
2623                          */
2624                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2625                             &prm);
2626                         pr_debug("Status CTIO7: %p\n", ctio);
2627                 }
2628         } else
2629                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2630
2631
2632         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2633         cmd->cmd_sent_to_fw = 1;
2634
2635         /* Memory Barrier */
2636         wmb();
2637         qla2x00_start_iocbs(vha, vha->req);
2638         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2639
2640         return 0;
2641
2642 out_unmap_unlock:
2643         qlt_unmap_sg(vha, cmd);
2644         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2645
2646         return res;
2647 }
2648 EXPORT_SYMBOL(qlt_xmit_response);
2649
2650 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2651 {
2652         struct ctio7_to_24xx *pkt;
2653         struct scsi_qla_host *vha = cmd->vha;
2654         struct qla_hw_data *ha = vha->hw;
2655         struct qla_tgt *tgt = cmd->tgt;
2656         struct qla_tgt_prm prm;
2657         unsigned long flags;
2658         int res = 0;
2659
2660         memset(&prm, 0, sizeof(prm));
2661         prm.cmd = cmd;
2662         prm.tgt = tgt;
2663         prm.sg = NULL;
2664         prm.req_cnt = 1;
2665
2666         /* Send marker if required */
2667         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2668                 return -EIO;
2669
2670         /* Calculate number of entries and segments required */
2671         if (qlt_pci_map_calc_cnt(&prm) != 0)
2672                 return -EAGAIN;
2673
2674         spin_lock_irqsave(&ha->hardware_lock, flags);
2675
2676         if (qla2x00_reset_active(vha) || (cmd->reset_count != ha->chip_reset) ||
2677             (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2678                 /*
2679                  * Either a chip reset is active or this request was from
2680                  * previous life, just abort the processing.
2681                  */
2682                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2683                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2684                 ql_dbg(ql_dbg_async, vha, 0xe102,
2685                         "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2686                         qla2x00_reset_active(vha), cmd->reset_count,
2687                         ha->chip_reset);
2688                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2689                 return 0;
2690         }
2691
2692         /* Does F/W have an IOCBs for this request */
2693         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2694         if (res != 0)
2695                 goto out_unlock_free_unmap;
2696         if (cmd->se_cmd.prot_op)
2697                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2698         else
2699                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2700
2701         if (unlikely(res != 0)) {
2702                 vha->req->cnt += prm.req_cnt;
2703                 goto out_unlock_free_unmap;
2704         }
2705
2706         pkt = (struct ctio7_to_24xx *)prm.pkt;
2707         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2708             CTIO7_FLAGS_STATUS_MODE_0);
2709
2710         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2711                 qlt_load_data_segments(&prm, vha);
2712
2713         cmd->state = QLA_TGT_STATE_NEED_DATA;
2714         cmd->cmd_sent_to_fw = 1;
2715
2716         /* Memory Barrier */
2717         wmb();
2718         qla2x00_start_iocbs(vha, vha->req);
2719         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2720
2721         return res;
2722
2723 out_unlock_free_unmap:
2724         qlt_unmap_sg(vha, cmd);
2725         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2726
2727         return res;
2728 }
2729 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2730
2731
2732 /*
2733  * Checks the guard or meta-data for the type of error
2734  * detected by the HBA.
2735  */
2736 static inline int
2737 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2738                 struct ctio_crc_from_fw *sts)
2739 {
2740         uint8_t         *ap = &sts->actual_dif[0];
2741         uint8_t         *ep = &sts->expected_dif[0];
2742         uint32_t        e_ref_tag, a_ref_tag;
2743         uint16_t        e_app_tag, a_app_tag;
2744         uint16_t        e_guard, a_guard;
2745         uint64_t        lba = cmd->se_cmd.t_task_lba;
2746
2747         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2748         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2749         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2750
2751         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2752         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2753         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2754
2755         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2756             "iocb(s) %p Returned STATUS.\n", sts);
2757
2758         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2759             "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",
2760             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2761             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2762
2763         /*
2764          * Ignore sector if:
2765          * For type     3: ref & app tag is all 'f's
2766          * For type 0,1,2: app tag is all 'f's
2767          */
2768         if ((a_app_tag == 0xffff) &&
2769             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2770              (a_ref_tag == 0xffffffff))) {
2771                 uint32_t blocks_done;
2772
2773                 /* 2TB boundary case covered automatically with this */
2774                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2775                 cmd->se_cmd.bad_sector = e_ref_tag;
2776                 cmd->se_cmd.pi_err = 0;
2777                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2778                         "need to return scsi good\n");
2779
2780                 /* Update protection tag */
2781                 if (cmd->prot_sg_cnt) {
2782                         uint32_t i, j = 0, k = 0, num_ent;
2783                         struct scatterlist *sg, *sgl;
2784
2785
2786                         sgl = cmd->prot_sg;
2787
2788                         /* Patch the corresponding protection tags */
2789                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2790                                 num_ent = sg_dma_len(sg) / 8;
2791                                 if (k + num_ent < blocks_done) {
2792                                         k += num_ent;
2793                                         continue;
2794                                 }
2795                                 j = blocks_done - k - 1;
2796                                 k = blocks_done;
2797                                 break;
2798                         }
2799
2800                         if (k != blocks_done) {
2801                                 ql_log(ql_log_warn, vha, 0xf076,
2802                                     "unexpected tag values tag:lba=%u:%llu)\n",
2803                                     e_ref_tag, (unsigned long long)lba);
2804                                 goto out;
2805                         }
2806
2807 #if 0
2808                         struct sd_dif_tuple *spt;
2809                         /* TODO:
2810                          * This section came from initiator. Is it valid here?
2811                          * should ulp be override with actual val???
2812                          */
2813                         spt = page_address(sg_page(sg)) + sg->offset;
2814                         spt += j;
2815
2816                         spt->app_tag = 0xffff;
2817                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2818                                 spt->ref_tag = 0xffffffff;
2819 #endif
2820                 }
2821
2822                 return 0;
2823         }
2824
2825         /* check guard */
2826         if (e_guard != a_guard) {
2827                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2828                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2829
2830                 ql_log(ql_log_warn, vha, 0xe076,
2831                     "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",
2832                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2833                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2834                     a_guard, e_guard, cmd);
2835                 goto out;
2836         }
2837
2838         /* check ref tag */
2839         if (e_ref_tag != a_ref_tag) {
2840                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2841                 cmd->se_cmd.bad_sector = e_ref_tag;
2842
2843                 ql_log(ql_log_warn, vha, 0xe077,
2844                         "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",
2845                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2846                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2847                         a_guard, e_guard, cmd);
2848                 goto out;
2849         }
2850
2851         /* check appl tag */
2852         if (e_app_tag != a_app_tag) {
2853                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2854                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2855
2856                 ql_log(ql_log_warn, vha, 0xe078,
2857                         "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",
2858                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2859                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2860                         a_guard, e_guard, cmd);
2861                 goto out;
2862         }
2863 out:
2864         return 1;
2865 }
2866
2867
2868 /* If hardware_lock held on entry, might drop it, then reaquire */
2869 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2870 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
2871         struct imm_ntfy_from_isp *ntfy)
2872 {
2873         struct nack_to_isp *nack;
2874         struct qla_hw_data *ha = vha->hw;
2875         request_t *pkt;
2876         int ret = 0;
2877
2878         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
2879             "Sending TERM ELS CTIO (ha=%p)\n", ha);
2880
2881         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2882         if (pkt == NULL) {
2883                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
2884                     "qla_target(%d): %s failed: unable to allocate "
2885                     "request packet\n", vha->vp_idx, __func__);
2886                 return -ENOMEM;
2887         }
2888
2889         pkt->entry_type = NOTIFY_ACK_TYPE;
2890         pkt->entry_count = 1;
2891         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2892
2893         nack = (struct nack_to_isp *)pkt;
2894         nack->ox_id = ntfy->ox_id;
2895
2896         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
2897         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
2898                 nack->u.isp24.flags = ntfy->u.isp24.flags &
2899                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
2900         }
2901
2902         /* terminate */
2903         nack->u.isp24.flags |=
2904                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
2905
2906         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
2907         nack->u.isp24.status = ntfy->u.isp24.status;
2908         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
2909         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
2910         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
2911         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
2912         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
2913         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
2914
2915         qla2x00_start_iocbs(vha, vha->req);
2916         return ret;
2917 }
2918
2919 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
2920         struct imm_ntfy_from_isp *imm, int ha_locked)
2921 {
2922         unsigned long flags = 0;
2923         int rc;
2924
2925         if (qlt_issue_marker(vha, ha_locked) < 0)
2926                 return;
2927
2928         if (ha_locked) {
2929                 rc = __qlt_send_term_imm_notif(vha, imm);
2930
2931 #if 0   /* Todo  */
2932                 if (rc == -ENOMEM)
2933                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
2934 #endif
2935                 goto done;
2936         }
2937
2938         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2939         rc = __qlt_send_term_imm_notif(vha, imm);
2940
2941 #if 0   /* Todo */
2942         if (rc == -ENOMEM)
2943                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
2944 #endif
2945
2946 done:
2947         if (!ha_locked)
2948                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2949 }
2950
2951 /* If hardware_lock held on entry, might drop it, then reaquire */
2952 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2953 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2954         struct qla_tgt_cmd *cmd,
2955         struct atio_from_isp *atio)
2956 {
2957         struct ctio7_to_24xx *ctio24;
2958         struct qla_hw_data *ha = vha->hw;
2959         request_t *pkt;
2960         int ret = 0;
2961         uint16_t temp;
2962
2963         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2964
2965         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2966         if (pkt == NULL) {
2967                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2968                     "qla_target(%d): %s failed: unable to allocate "
2969                     "request packet\n", vha->vp_idx, __func__);
2970                 return -ENOMEM;
2971         }
2972
2973         if (cmd != NULL) {
2974                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2975                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2976                             "qla_target(%d): Terminating cmd %p with "
2977                             "incorrect state %d\n", vha->vp_idx, cmd,
2978                             cmd->state);
2979                 } else
2980                         ret = 1;
2981         }
2982
2983         pkt->entry_count = 1;
2984         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2985
2986         ctio24 = (struct ctio7_to_24xx *)pkt;
2987         ctio24->entry_type = CTIO_TYPE7;
2988         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2989         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2990         ctio24->vp_index = vha->vp_idx;
2991         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2992         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2993         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2994         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2995         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2996             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2997                 CTIO7_FLAGS_TERMINATE);
2998         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2999         ctio24->u.status1.ox_id = cpu_to_le16(temp);
3000
3001         /* Most likely, it isn't needed */
3002         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3003             &atio->u.isp24.fcp_cmnd.add_cdb[
3004             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3005         if (ctio24->u.status1.residual != 0)
3006                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3007
3008         /* Memory Barrier */
3009         wmb();
3010         qla2x00_start_iocbs(vha, vha->req);
3011         return ret;
3012 }
3013
3014 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
3015         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
3016 {
3017         unsigned long flags = 0;
3018         int rc;
3019
3020         if (qlt_issue_marker(vha, ha_locked) < 0)
3021                 return;
3022
3023         if (ha_locked) {
3024                 rc = __qlt_send_term_exchange(vha, cmd, atio);
3025                 if (rc == -ENOMEM)
3026                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3027                 goto done;
3028         }
3029         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3030         rc = __qlt_send_term_exchange(vha, cmd, atio);
3031         if (rc == -ENOMEM)
3032                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3033
3034 done:
3035         if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
3036             !cmd->cmd_sent_to_fw)) {
3037                 if (cmd->sg_mapped)
3038                         qlt_unmap_sg(vha, cmd);
3039                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3040         }
3041
3042         if (!ha_locked)
3043                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3044
3045         return;
3046 }
3047
3048 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3049 {
3050         struct list_head free_list;
3051         struct qla_tgt_cmd *cmd, *tcmd;
3052
3053         vha->hw->tgt.leak_exchg_thresh_hold =
3054             (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3055
3056         cmd = tcmd = NULL;
3057         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3058                 INIT_LIST_HEAD(&free_list);
3059                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3060
3061                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3062                         list_del(&cmd->cmd_list);
3063                         /* This cmd was never sent to TCM.  There is no need
3064                          * to schedule free or call free_cmd
3065                          */
3066                         qlt_free_cmd(cmd);
3067                         vha->hw->tgt.num_qfull_cmds_alloc--;
3068                 }
3069         }
3070         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3071 }
3072
3073 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3074 {
3075         uint32_t total_leaked;
3076
3077         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3078
3079         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3080             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3081
3082                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3083                     "Chip reset due to exchange starvation: %d/%d.\n",
3084                     total_leaked, vha->hw->fw_xcb_count);
3085
3086                 if (IS_P3P_TYPE(vha->hw))
3087                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3088                 else
3089                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3090                 qla2xxx_wake_dpc(vha);
3091         }
3092
3093 }
3094
3095 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3096 {
3097         struct qla_tgt_sess *sess = cmd->sess;
3098
3099         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3100             "%s: se_cmd[%p] ox_id %04x\n",
3101             __func__, &cmd->se_cmd,
3102             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3103
3104         BUG_ON(cmd->cmd_in_wq);
3105
3106         if (!cmd->q_full)
3107                 qlt_decr_num_pend_cmds(cmd->vha);
3108
3109         BUG_ON(cmd->sg_mapped);
3110         cmd->jiffies_at_free = get_jiffies_64();
3111         if (unlikely(cmd->free_sg))
3112                 kfree(cmd->sg);
3113
3114         if (!sess || !sess->se_sess) {
3115                 WARN_ON(1);
3116                 return;
3117         }
3118         cmd->jiffies_at_free = get_jiffies_64();
3119         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3120 }
3121 EXPORT_SYMBOL(qlt_free_cmd);
3122
3123 /* ha->hardware_lock supposed to be held on entry */
3124 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
3125         struct qla_tgt_cmd *cmd, void *ctio)
3126 {
3127         struct qla_tgt_srr_ctio *sc;
3128         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3129         struct qla_tgt_srr_imm *imm;
3130
3131         tgt->ctio_srr_id++;
3132         cmd->cmd_flags |= BIT_15;
3133
3134         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
3135             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
3136
3137         if (!ctio) {
3138                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
3139                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
3140                     vha->vp_idx);
3141                 return -EINVAL;
3142         }
3143
3144         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
3145         if (sc != NULL) {
3146                 sc->cmd = cmd;
3147                 /* IRQ is already OFF */
3148                 spin_lock(&tgt->srr_lock);
3149                 sc->srr_id = tgt->ctio_srr_id;
3150                 list_add_tail(&sc->srr_list_entry,
3151                     &tgt->srr_ctio_list);
3152                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
3153                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
3154                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3155                         int found = 0;
3156                         list_for_each_entry(imm, &tgt->srr_imm_list,
3157                             srr_list_entry) {
3158                                 if (imm->srr_id == sc->srr_id) {
3159                                         found = 1;
3160                                         break;
3161                                 }
3162                         }
3163                         if (found) {
3164                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
3165                                     "Scheduling srr work\n");
3166                                 schedule_work(&tgt->srr_work);
3167                         } else {
3168                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
3169                                     "qla_target(%d): imm_srr_id "
3170                                     "== ctio_srr_id (%d), but there is no "
3171                                     "corresponding SRR IMM, deleting CTIO "
3172                                     "SRR %p\n", vha->vp_idx,
3173                                     tgt->ctio_srr_id, sc);
3174                                 list_del(&sc->srr_list_entry);
3175                                 spin_unlock(&tgt->srr_lock);
3176
3177                                 kfree(sc);
3178                                 return -EINVAL;
3179                         }
3180                 }
3181                 spin_unlock(&tgt->srr_lock);
3182         } else {
3183                 struct qla_tgt_srr_imm *ti;
3184
3185                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
3186                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
3187                     vha->vp_idx);
3188                 spin_lock(&tgt->srr_lock);
3189                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
3190                     srr_list_entry) {
3191                         if (imm->srr_id == tgt->ctio_srr_id) {
3192                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
3193                                     "IMM SRR %p deleted (id %d)\n",
3194                                     imm, imm->srr_id);
3195                                 list_del(&imm->srr_list_entry);
3196                                 qlt_reject_free_srr_imm(vha, imm, 1);
3197                         }
3198                 }
3199                 spin_unlock(&tgt->srr_lock);
3200
3201                 return -ENOMEM;
3202         }
3203
3204         return 0;
3205 }
3206
3207 /*
3208  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3209  */
3210 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3211         struct qla_tgt_cmd *cmd, uint32_t status)
3212 {
3213         int term = 0;
3214
3215         if (ctio != NULL) {
3216                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3217                 term = !(c->flags &
3218                     __constant_cpu_to_le16(OF_TERM_EXCH));
3219         } else
3220                 term = 1;
3221
3222         if (term)
3223                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3224
3225         return term;
3226 }
3227
3228 /* ha->hardware_lock supposed to be held on entry */
3229 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3230         uint32_t handle)
3231 {
3232         struct qla_hw_data *ha = vha->hw;
3233
3234         handle--;
3235         if (ha->tgt.cmds[handle] != NULL) {
3236                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3237                 ha->tgt.cmds[handle] = NULL;
3238                 return cmd;
3239         } else
3240                 return NULL;
3241 }
3242
3243 /* ha->hardware_lock supposed to be held on entry */
3244 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3245         uint32_t handle, void *ctio)
3246 {
3247         struct qla_tgt_cmd *cmd = NULL;
3248
3249         /* Clear out internal marks */
3250         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3251             CTIO_INTERMEDIATE_HANDLE_MARK);
3252
3253         if (handle != QLA_TGT_NULL_HANDLE) {
3254                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3255                         return NULL;
3256
3257                 /* handle-1 is actually used */
3258                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3259                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3260                             "qla_target(%d): Wrong handle %x received\n",
3261                             vha->vp_idx, handle);
3262                         return NULL;
3263                 }
3264                 cmd = qlt_get_cmd(vha, handle);
3265                 if (unlikely(cmd == NULL)) {
3266                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
3267                             "qla_target(%d): Suspicious: unable to "
3268                             "find the command with handle %x\n", vha->vp_idx,
3269                             handle);
3270                         return NULL;
3271                 }
3272         } else if (ctio != NULL) {
3273                 /* We can't get loop ID from CTIO7 */
3274                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3275                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3276                     "support NULL handles\n", vha->vp_idx);
3277                 return NULL;
3278         }
3279
3280         return cmd;
3281 }
3282
3283 /* hardware_lock should be held by caller. */
3284 static void
3285 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3286 {
3287         struct qla_hw_data *ha = vha->hw;
3288         uint32_t handle;
3289
3290         if (cmd->sg_mapped)
3291                 qlt_unmap_sg(vha, cmd);
3292
3293         handle = qlt_make_handle(vha);
3294
3295         /* TODO: fix debug message type and ids. */
3296         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3297                 ql_dbg(ql_dbg_io, vha, 0xff00,
3298                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3299         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3300                 cmd->write_data_transferred = 0;
3301                 cmd->state = QLA_TGT_STATE_DATA_IN;
3302
3303                 ql_dbg(ql_dbg_io, vha, 0xff01,
3304                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3305
3306                 ha->tgt.tgt_ops->handle_data(cmd);
3307                 return;
3308         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3309                 ql_dbg(ql_dbg_io, vha, 0xff02,
3310                     "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3311         } else {
3312                 ql_dbg(ql_dbg_io, vha, 0xff03,
3313                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3314                     cmd->state);
3315                 dump_stack();
3316         }
3317
3318         cmd->cmd_flags |= BIT_17;
3319         ha->tgt.tgt_ops->free_cmd(cmd);
3320 }
3321
3322 void
3323 qlt_host_reset_handler(struct qla_hw_data *ha)
3324 {
3325         struct qla_tgt_cmd *cmd;
3326         unsigned long flags;
3327         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3328         scsi_qla_host_t *vha = NULL;
3329         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3330         uint32_t i;
3331
3332         if (!base_vha->hw->tgt.tgt_ops)
3333                 return;
3334
3335         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3336                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3337                         "Target mode disabled\n");
3338                 return;
3339         }
3340
3341         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3342             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3343             base_vha->dpc_flags);
3344
3345         spin_lock_irqsave(&ha->hardware_lock, flags);
3346         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3347                 cmd = qlt_get_cmd(base_vha, i);
3348                 if (!cmd)
3349                         continue;
3350                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3351                 vha = cmd->vha;
3352                 qlt_abort_cmd_on_host_reset(vha, cmd);
3353         }
3354         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3355 }
3356
3357
3358 /*
3359  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3360  */
3361 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3362         uint32_t status, void *ctio)
3363 {
3364         struct qla_hw_data *ha = vha->hw;
3365         struct se_cmd *se_cmd;
3366         const struct target_core_fabric_ops *tfo;
3367         struct qla_tgt_cmd *cmd;
3368
3369         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3370                 /* That could happen only in case of an error/reset/abort */
3371                 if (status != CTIO_SUCCESS) {
3372                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3373                             "Intermediate CTIO received"
3374                             " (status %x)\n", status);
3375                 }
3376                 return;
3377         }
3378
3379         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3380         if (cmd == NULL)
3381                 return;
3382
3383         se_cmd = &cmd->se_cmd;
3384         tfo = se_cmd->se_tfo;
3385         cmd->cmd_sent_to_fw = 0;
3386
3387         qlt_unmap_sg(vha, cmd);
3388
3389         if (unlikely(status != CTIO_SUCCESS)) {
3390                 switch (status & 0xFFFF) {
3391                 case CTIO_LIP_RESET:
3392                 case CTIO_TARGET_RESET:
3393                 case CTIO_ABORTED:
3394                         /* driver request abort via Terminate exchange */
3395                 case CTIO_TIMEOUT:
3396                 case CTIO_INVALID_RX_ID:
3397                         /* They are OK */
3398                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3399                             "qla_target(%d): CTIO with "
3400                             "status %#x received, state %x, se_cmd %p, "
3401                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3402                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3403                             status, cmd->state, se_cmd);
3404                         break;
3405
3406                 case CTIO_PORT_LOGGED_OUT:
3407                 case CTIO_PORT_UNAVAILABLE:
3408                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3409                             "qla_target(%d): CTIO with PORT LOGGED "
3410                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
3411                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3412                             status, cmd->state, se_cmd);
3413                         break;
3414
3415                 case CTIO_SRR_RECEIVED:
3416                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3417                             "qla_target(%d): CTIO with SRR_RECEIVED"
3418                             " status %x received (state %x, se_cmd %p)\n",
3419                             vha->vp_idx, status, cmd->state, se_cmd);
3420                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3421                                 break;
3422                         else
3423                                 return;
3424
3425                 case CTIO_DIF_ERROR: {
3426                         struct ctio_crc_from_fw *crc =
3427                                 (struct ctio_crc_from_fw *)ctio;
3428                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3429                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3430                             vha->vp_idx, status, cmd->state, se_cmd,
3431                             *((u64 *)&crc->actual_dif[0]),
3432                             *((u64 *)&crc->expected_dif[0]));
3433
3434                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3435                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3436                                         /* scsi Write/xfer rdy complete */
3437                                         goto skip_term;
3438                                 } else {
3439                                         /* scsi read/xmit respond complete
3440                                          * call handle dif to send scsi status
3441                                          * rather than terminate exchange.
3442                                          */
3443                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3444                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3445                                         return;
3446                                 }
3447                         } else {
3448                                 /* Need to generate a SCSI good completion.
3449                                  * because FW did not send scsi status.
3450                                  */
3451                                 status = 0;
3452                                 goto skip_term;
3453                         }
3454                         break;
3455                 }
3456                 default:
3457                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3458                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3459                             vha->vp_idx, status, cmd->state, se_cmd);
3460                         break;
3461                 }
3462
3463
3464                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3465                  * cmd is already aborted/terminated, we don't
3466                  * need to terminate again.  The exchange is already
3467                  * cleaned up/freed at FW level.  Just cleanup at driver
3468                  * level.
3469                  */
3470                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3471                     (cmd->state != QLA_TGT_STATE_ABORTED)) {
3472                         cmd->cmd_flags |= BIT_13;
3473                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3474                                 return;
3475                 }
3476         }
3477 skip_term:
3478
3479         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3480                 cmd->cmd_flags |= BIT_12;
3481         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3482                 int rx_status = 0;
3483
3484                 cmd->state = QLA_TGT_STATE_DATA_IN;
3485
3486                 if (unlikely(status != CTIO_SUCCESS))
3487                         rx_status = -EIO;
3488                 else
3489                         cmd->write_data_transferred = 1;
3490
3491                 ha->tgt.tgt_ops->handle_data(cmd);
3492                 return;
3493         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3494                 cmd->cmd_flags |= BIT_18;
3495                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3496                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3497         } else {
3498                 cmd->cmd_flags |= BIT_19;
3499                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3500                     "qla_target(%d): A command in state (%d) should "
3501                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3502         }
3503
3504         if (unlikely(status != CTIO_SUCCESS) &&
3505                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3506                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3507                 dump_stack();
3508         }
3509
3510         ha->tgt.tgt_ops->free_cmd(cmd);
3511 }
3512
3513 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3514         uint8_t task_codes)
3515 {
3516         int fcp_task_attr;
3517
3518         switch (task_codes) {
3519         case ATIO_SIMPLE_QUEUE:
3520                 fcp_task_attr = TCM_SIMPLE_TAG;
3521                 break;
3522         case ATIO_HEAD_OF_QUEUE:
3523                 fcp_task_attr = TCM_HEAD_TAG;
3524                 break;
3525         case ATIO_ORDERED_QUEUE:
3526                 fcp_task_attr = TCM_ORDERED_TAG;
3527                 break;
3528         case ATIO_ACA_QUEUE:
3529                 fcp_task_attr = TCM_ACA_TAG;
3530                 break;
3531         case ATIO_UNTAGGED:
3532                 fcp_task_attr = TCM_SIMPLE_TAG;
3533                 break;
3534         default:
3535                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3536                     "qla_target: unknown task code %x, use ORDERED instead\n",
3537                     task_codes);
3538                 fcp_task_attr = TCM_ORDERED_TAG;
3539                 break;
3540         }
3541
3542         return fcp_task_attr;
3543 }
3544
3545 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3546                                         uint8_t *);
3547 /*
3548  * Process context for I/O path into tcm_qla2xxx code
3549  */
3550 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3551 {
3552         scsi_qla_host_t *vha = cmd->vha;
3553         struct qla_hw_data *ha = vha->hw;
3554         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3555         struct qla_tgt_sess *sess = cmd->sess;
3556         struct atio_from_isp *atio = &cmd->atio;
3557         unsigned char *cdb;
3558         unsigned long flags;
3559         uint32_t data_length;
3560         int ret, fcp_task_attr, data_dir, bidi = 0;
3561
3562         cmd->cmd_in_wq = 0;
3563         cmd->cmd_flags |= BIT_1;
3564         if (tgt->tgt_stop)
3565                 goto out_term;
3566
3567         if (cmd->state == QLA_TGT_STATE_ABORTED) {
3568                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3569                     "cmd with tag %u is aborted\n",
3570                     cmd->atio.u.isp24.exchange_addr);
3571                 goto out_term;
3572         }
3573
3574         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3575         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3576         cmd->unpacked_lun = scsilun_to_int(
3577             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3578
3579         if (atio->u.isp24.fcp_cmnd.rddata &&
3580             atio->u.isp24.fcp_cmnd.wrdata) {
3581                 bidi = 1;
3582                 data_dir = DMA_TO_DEVICE;
3583         } else if (atio->u.isp24.fcp_cmnd.rddata)
3584                 data_dir = DMA_FROM_DEVICE;
3585         else if (atio->u.isp24.fcp_cmnd.wrdata)
3586                 data_dir = DMA_TO_DEVICE;
3587         else
3588                 data_dir = DMA_NONE;
3589
3590         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3591             atio->u.isp24.fcp_cmnd.task_attr);
3592         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3593             &atio->u.isp24.fcp_cmnd.add_cdb[
3594             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3595
3596         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3597                                           fcp_task_attr, data_dir, bidi);
3598         if (ret != 0)
3599                 goto out_term;
3600         /*
3601          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3602          */
3603         spin_lock_irqsave(&ha->hardware_lock, flags);
3604         ha->tgt.tgt_ops->put_sess(sess);
3605         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3606         return;
3607
3608 out_term:
3609         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3610         /*
3611          * cmd has not sent to target yet, so pass NULL as the second
3612          * argument to qlt_send_term_exchange() and free the memory here.
3613          */
3614         cmd->cmd_flags |= BIT_2;
3615         spin_lock_irqsave(&ha->hardware_lock, flags);
3616         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3617
3618         qlt_decr_num_pend_cmds(vha);
3619         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3620         ha->tgt.tgt_ops->put_sess(sess);
3621         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3622 }
3623
3624 static void qlt_do_work(struct work_struct *work)
3625 {
3626         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3627         scsi_qla_host_t *vha = cmd->vha;
3628         unsigned long flags;
3629
3630         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3631         list_del(&cmd->cmd_list);
3632         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3633
3634         __qlt_do_work(cmd);
3635 }
3636
3637 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3638                                        struct qla_tgt_sess *sess,
3639                                        struct atio_from_isp *atio)
3640 {
3641         struct se_session *se_sess = sess->se_sess;
3642         struct qla_tgt_cmd *cmd;
3643         int tag;
3644
3645         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3646         if (tag < 0)
3647                 return NULL;
3648
3649         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3650         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3651
3652         memcpy(&cmd->atio, atio, sizeof(*atio));
3653         cmd->state = QLA_TGT_STATE_NEW;
3654         cmd->tgt = vha->vha_tgt.qla_tgt;
3655         qlt_incr_num_pend_cmds(vha);
3656         cmd->vha = vha;
3657         cmd->se_cmd.map_tag = tag;
3658         cmd->sess = sess;
3659         cmd->loop_id = sess->loop_id;
3660         cmd->conf_compl_supported = sess->conf_compl_supported;
3661
3662         cmd->cmd_flags = 0;
3663         cmd->jiffies_at_alloc = get_jiffies_64();
3664
3665         cmd->reset_count = vha->hw->chip_reset;
3666
3667         return cmd;
3668 }
3669
3670 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3671                           uint16_t);
3672
3673 static void qlt_create_sess_from_atio(struct work_struct *work)
3674 {
3675         struct qla_tgt_sess_op *op = container_of(work,
3676                                         struct qla_tgt_sess_op, work);
3677         scsi_qla_host_t *vha = op->vha;
3678         struct qla_hw_data *ha = vha->hw;
3679         struct qla_tgt_sess *sess;
3680         struct qla_tgt_cmd *cmd;
3681         unsigned long flags;
3682         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3683
3684         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3685         list_del(&op->cmd_list);
3686         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3687
3688         if (op->aborted) {
3689                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3690                     "sess_op with tag %u is aborted\n",
3691                     op->atio.u.isp24.exchange_addr);
3692                 goto out_term;
3693         }
3694
3695         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3696             "qla_target(%d): Unable to find wwn login"
3697             " (s_id %x:%x:%x), trying to create it manually\n",
3698             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3699
3700         if (op->atio.u.raw.entry_count > 1) {
3701                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3702                     "Dropping multy entry atio %p\n", &op->atio);
3703                 goto out_term;
3704         }
3705
3706         mutex_lock(&vha->vha_tgt.tgt_mutex);
3707         sess = qlt_make_local_sess(vha, s_id);
3708         /* sess has an extra creation ref. */
3709         mutex_unlock(&vha->vha_tgt.tgt_mutex);
3710
3711         if (!sess)
3712                 goto out_term;
3713         /*
3714          * Now obtain a pre-allocated session tag using the original op->atio
3715          * packet header, and dispatch into __qlt_do_work() using the existing
3716          * process context.
3717          */
3718         cmd = qlt_get_tag(vha, sess, &op->atio);
3719         if (!cmd) {
3720                 spin_lock_irqsave(&ha->hardware_lock, flags);
3721                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3722                 ha->tgt.tgt_ops->put_sess(sess);
3723                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3724                 kfree(op);
3725                 return;
3726         }
3727         /*
3728          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3729          * the extra reference taken above by qlt_make_local_sess()
3730          */
3731         __qlt_do_work(cmd);
3732         kfree(op);
3733         return;
3734
3735 out_term:
3736         spin_lock_irqsave(&ha->hardware_lock, flags);
3737         qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3738         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3739         kfree(op);
3740
3741 }
3742
3743 /* ha->hardware_lock supposed to be held on entry */
3744 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3745         struct atio_from_isp *atio)
3746 {
3747         struct qla_hw_data *ha = vha->hw;
3748         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3749         struct qla_tgt_sess *sess;
3750         struct qla_tgt_cmd *cmd;
3751
3752         if (unlikely(tgt->tgt_stop)) {
3753                 ql_dbg(ql_dbg_io, vha, 0x3061,
3754                     "New command while device %p is shutting down\n", tgt);
3755                 return -EFAULT;
3756         }
3757
3758         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3759         if (unlikely(!sess)) {
3760                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3761                                                      GFP_ATOMIC);
3762                 if (!op)
3763                         return -ENOMEM;
3764
3765                 memcpy(&op->atio, atio, sizeof(*atio));
3766                 op->vha = vha;
3767
3768                 spin_lock(&vha->cmd_list_lock);
3769                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3770                 spin_unlock(&vha->cmd_list_lock);
3771
3772                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3773                 queue_work(qla_tgt_wq, &op->work);
3774                 return 0;
3775         }
3776
3777         /* Another WWN used to have our s_id. Our PLOGI scheduled its
3778          * session deletion, but it's still in sess_del_work wq */
3779         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
3780                 ql_dbg(ql_dbg_io, vha, 0x3061,
3781                     "New command while old session %p is being deleted\n",
3782                     sess);
3783                 return -EFAULT;
3784         }
3785
3786         /*
3787          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3788          */
3789         kref_get(&sess->se_sess->sess_kref);
3790
3791         cmd = qlt_get_tag(vha, sess, atio);
3792         if (!cmd) {
3793                 ql_dbg(ql_dbg_io, vha, 0x3062,
3794                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3795                 ha->tgt.tgt_ops->put_sess(sess);
3796                 return -ENOMEM;
3797         }
3798
3799         cmd->cmd_in_wq = 1;
3800         cmd->cmd_flags |= BIT_0;
3801
3802         spin_lock(&vha->cmd_list_lock);
3803         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
3804         spin_unlock(&vha->cmd_list_lock);
3805
3806         INIT_WORK(&cmd->work, qlt_do_work);
3807         queue_work(qla_tgt_wq, &cmd->work);
3808         return 0;
3809
3810 }
3811
3812 /* ha->hardware_lock supposed to be held on entry */
3813 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3814         int fn, void *iocb, int flags)
3815 {
3816         struct scsi_qla_host *vha = sess->vha;
3817         struct qla_hw_data *ha = vha->hw;
3818         struct qla_tgt_mgmt_cmd *mcmd;
3819         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3820         int res;
3821         uint8_t tmr_func;
3822
3823         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3824         if (!mcmd) {
3825                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3826                     "qla_target(%d): Allocation of management "
3827                     "command failed, some commands and their data could "
3828                     "leak\n", vha->vp_idx);
3829                 return -ENOMEM;
3830         }
3831         memset(mcmd, 0, sizeof(*mcmd));
3832         mcmd->sess = sess;
3833
3834         if (iocb) {
3835                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3836                     sizeof(mcmd->orig_iocb.imm_ntfy));
3837         }
3838         mcmd->tmr_func = fn;
3839         mcmd->flags = flags;
3840         mcmd->reset_count = vha->hw->chip_reset;
3841
3842         switch (fn) {
3843         case QLA_TGT_CLEAR_ACA:
3844                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3845                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3846                 tmr_func = TMR_CLEAR_ACA;
3847                 break;
3848
3849         case QLA_TGT_TARGET_RESET:
3850                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3851                     "qla_target(%d): TARGET_RESET received\n",
3852                     sess->vha->vp_idx);
3853                 tmr_func = TMR_TARGET_WARM_RESET;
3854                 break;
3855
3856         case QLA_TGT_LUN_RESET:
3857                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3858                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3859                 tmr_func = TMR_LUN_RESET;
3860                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
3861                 break;
3862
3863         case QLA_TGT_CLEAR_TS:
3864                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3865                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3866                 tmr_func = TMR_CLEAR_TASK_SET;
3867                 break;
3868
3869         case QLA_TGT_ABORT_TS:
3870                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3871                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3872                 tmr_func = TMR_ABORT_TASK_SET;
3873                 break;
3874 #if 0
3875         case QLA_TGT_ABORT_ALL:
3876                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3877                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3878                     sess->vha->vp_idx);
3879                 tmr_func = 0;
3880                 break;
3881
3882         case QLA_TGT_ABORT_ALL_SESS:
3883                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3884                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3885                     sess->vha->vp_idx);
3886                 tmr_func = 0;
3887                 break;
3888
3889         case QLA_TGT_NEXUS_LOSS_SESS:
3890                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3891                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3892                     sess->vha->vp_idx);
3893                 tmr_func = 0;
3894                 break;
3895
3896         case QLA_TGT_NEXUS_LOSS:
3897                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3898                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3899                 tmr_func = 0;
3900                 break;
3901 #endif
3902         default:
3903                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3904                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3905                     sess->vha->vp_idx, fn);
3906                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3907                 return -ENOSYS;
3908         }
3909
3910         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3911         if (res != 0) {
3912                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3913                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3914                     sess->vha->vp_idx, res);
3915                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3916                 return -EFAULT;
3917         }
3918
3919         return 0;
3920 }
3921
3922 /* ha->hardware_lock supposed to be held on entry */
3923 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3924 {
3925         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3926         struct qla_hw_data *ha = vha->hw;
3927         struct qla_tgt *tgt;
3928         struct qla_tgt_sess *sess;
3929         uint32_t lun, unpacked_lun;
3930         int lun_size, fn;
3931
3932         tgt = vha->vha_tgt.qla_tgt;
3933
3934         lun = a->u.isp24.fcp_cmnd.lun;
3935         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3936         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3937         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3938             a->u.isp24.fcp_hdr.s_id);
3939         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3940
3941         if (!sess) {
3942                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3943                     "qla_target(%d): task mgmt fn 0x%x for "
3944                     "non-existant session\n", vha->vp_idx, fn);
3945                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3946                     sizeof(struct atio_from_isp));
3947         }
3948
3949         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
3950                 return -EFAULT;
3951
3952         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3953 }
3954
3955 /* ha->hardware_lock supposed to be held on entry */
3956 static int __qlt_abort_task(struct scsi_qla_host *vha,
3957         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3958 {
3959         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3960         struct qla_hw_data *ha = vha->hw;
3961         struct qla_tgt_mgmt_cmd *mcmd;
3962         uint32_t lun, unpacked_lun;
3963         int rc;
3964
3965         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3966         if (mcmd == NULL) {
3967                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3968                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3969                     vha->vp_idx, __func__);
3970                 return -ENOMEM;
3971         }
3972         memset(mcmd, 0, sizeof(*mcmd));
3973
3974         mcmd->sess = sess;
3975         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3976             sizeof(mcmd->orig_iocb.imm_ntfy));
3977
3978         lun = a->u.isp24.fcp_cmnd.lun;
3979         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3980         mcmd->reset_count = vha->hw->chip_reset;
3981
3982         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3983             le16_to_cpu(iocb->u.isp2x.seq_id));
3984         if (rc != 0) {
3985                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3986                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3987                     vha->vp_idx, rc);
3988                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3989                 return -EFAULT;
3990         }
3991
3992         return 0;
3993 }
3994
3995 /* ha->hardware_lock supposed to be held on entry */
3996 static int qlt_abort_task(struct scsi_qla_host *vha,
3997         struct imm_ntfy_from_isp *iocb)
3998 {
3999         struct qla_hw_data *ha = vha->hw;
4000         struct qla_tgt_sess *sess;
4001         int loop_id;
4002
4003         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4004
4005         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4006         if (sess == NULL) {
4007                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4008                     "qla_target(%d): task abort for unexisting "
4009                     "session\n", vha->vp_idx);
4010                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4011                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4012         }
4013
4014         return __qlt_abort_task(vha, iocb, sess);
4015 }
4016
4017 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4018 {
4019         if (fcport->tgt_session) {
4020                 if (rc != MBS_COMMAND_COMPLETE) {
4021                         ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4022                                 "%s: se_sess %p / sess %p from"
4023                                 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4024                                 " LOGO failed: %#x\n",
4025                                 __func__,
4026                                 fcport->tgt_session->se_sess,
4027                                 fcport->tgt_session,
4028                                 fcport->port_name, fcport->loop_id,
4029                                 fcport->d_id.b.domain, fcport->d_id.b.area,
4030                                 fcport->d_id.b.al_pa, rc);
4031                 }
4032
4033                 fcport->tgt_session->logout_completed = 1;
4034         }
4035 }
4036
4037 static void qlt_swap_imm_ntfy_iocb(struct imm_ntfy_from_isp *a,
4038     struct imm_ntfy_from_isp *b)
4039 {
4040         struct imm_ntfy_from_isp tmp;
4041         memcpy(&tmp, a, sizeof(struct imm_ntfy_from_isp));
4042         memcpy(a, b, sizeof(struct imm_ntfy_from_isp));
4043         memcpy(b, &tmp, sizeof(struct imm_ntfy_from_isp));
4044 }
4045
4046 /*
4047 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4048 *
4049 * Schedules sessions with matching port_id/loop_id but different wwn for
4050 * deletion. Returns existing session with matching wwn if present.
4051 * Null otherwise.
4052 */
4053 static struct qla_tgt_sess *
4054 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4055     port_id_t port_id, uint16_t loop_id)
4056 {
4057         struct qla_tgt_sess *sess = NULL, *other_sess;
4058         uint64_t other_wwn;
4059
4060         list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4061
4062                 other_wwn = wwn_to_u64(other_sess->port_name);
4063
4064                 if (wwn == other_wwn) {
4065                         WARN_ON(sess);
4066                         sess = other_sess;
4067                         continue;
4068                 }
4069
4070                 /* find other sess with nport_id collision */
4071                 if (port_id.b24 == other_sess->s_id.b24) {
4072                         if (loop_id != other_sess->loop_id) {
4073                                 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4074                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4075                                     other_sess, other_sess->loop_id, other_wwn);
4076
4077                                 /*
4078                                  * logout_on_delete is set by default, but another
4079                                  * session that has the same s_id/loop_id combo
4080                                  * might have cleared it when requested this session
4081                                  * deletion, so don't touch it
4082                                  */
4083                                 qlt_schedule_sess_for_deletion(other_sess, true);
4084                         } else {
4085                                 /*
4086                                  * Another wwn used to have our s_id/loop_id
4087                                  * combo - kill the session, but don't log out
4088                                  */
4089                                 sess->logout_on_delete = 0;
4090                                 qlt_schedule_sess_for_deletion(other_sess,
4091                                     true);
4092                         }
4093                         continue;
4094                 }
4095
4096                 /* find other sess with nport handle collision */
4097                 if (loop_id == other_sess->loop_id) {
4098                         ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4099                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4100                                other_sess, other_sess->loop_id, other_wwn);
4101
4102                         /* Same loop_id but different s_id
4103                          * Ok to kill and logout */
4104                         qlt_schedule_sess_for_deletion(other_sess, true);
4105                 }
4106         }
4107
4108         return sess;
4109 }
4110
4111 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4112 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4113 {
4114         struct qla_tgt_sess_op *op;
4115         struct qla_tgt_cmd *cmd;
4116         uint32_t key;
4117         int count = 0;
4118
4119         key = (((u32)s_id->b.domain << 16) |
4120                ((u32)s_id->b.area   <<  8) |
4121                ((u32)s_id->b.al_pa));
4122
4123         spin_lock(&vha->cmd_list_lock);
4124         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4125                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4126                 if (op_key == key) {
4127                         op->aborted = true;
4128                         count++;
4129                 }
4130         }
4131         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4132                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4133                 if (cmd_key == key) {
4134                         cmd->state = QLA_TGT_STATE_ABORTED;
4135                         count++;
4136                 }
4137         }
4138         spin_unlock(&vha->cmd_list_lock);
4139
4140         return count;
4141 }
4142
4143 /*
4144  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4145  */
4146 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4147         struct imm_ntfy_from_isp *iocb)
4148 {
4149         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4150         struct qla_hw_data *ha = vha->hw;
4151         struct qla_tgt_sess *sess = NULL;
4152         uint64_t wwn;
4153         port_id_t port_id;
4154         uint16_t loop_id;
4155         uint16_t wd3_lo;
4156         int res = 0;
4157
4158         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4159
4160         port_id.b.domain = iocb->u.isp24.port_id[2];
4161         port_id.b.area   = iocb->u.isp24.port_id[1];
4162         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4163         port_id.b.rsvd_1 = 0;
4164
4165         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4166
4167         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4168             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4169             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4170
4171         /* res = 1 means ack at the end of thread
4172          * res = 0 means ack async/later.
4173          */
4174         switch (iocb->u.isp24.status_subcode) {
4175         case ELS_PLOGI:
4176
4177                 /* Mark all stale commands in qla_tgt_wq for deletion */
4178                 abort_cmds_for_s_id(vha, &port_id);
4179
4180                 if (wwn)
4181                         sess = qlt_find_sess_invalidate_other(tgt, wwn,
4182                             port_id, loop_id);
4183
4184                 if (!sess || IS_SW_RESV_ADDR(sess->s_id)) {
4185                         res = 1;
4186                         break;
4187                 }
4188
4189                 if (sess->plogi_ack_needed) {
4190                         /*
4191                          * Initiator sent another PLOGI before last PLOGI could
4192                          * finish. Swap plogi iocbs and terminate old one
4193                          * without acking, new one will get acked when session
4194                          * deletion completes.
4195                          */
4196                         ql_log(ql_log_warn, sess->vha, 0xf094,
4197                             "sess %p received double plogi.\n", sess);
4198
4199                         qlt_swap_imm_ntfy_iocb(iocb, &sess->tm_iocb);
4200
4201                         qlt_send_term_imm_notif(vha, iocb, 1);
4202
4203                         res = 0;
4204                         break;
4205                 }
4206
4207                 res = 0;
4208
4209                 /*
4210                  * Save immediate Notif IOCB for Ack when sess is done
4211                  * and being deleted.
4212                  */
4213                 memcpy(&sess->tm_iocb, iocb, sizeof(sess->tm_iocb));
4214                 sess->plogi_ack_needed  = 1;
4215
4216                  /*
4217                   * Under normal circumstances we want to release nport handle
4218                   * during LOGO process to avoid nport handle leaks inside FW.
4219                   * The exception is when LOGO is done while another PLOGI with
4220                   * the same nport handle is waiting as might be the case here.
4221                   * Note: there is always a possibily of a race where session
4222                   * deletion has already started for other reasons (e.g. ACL
4223                   * removal) and now PLOGI arrives:
4224                   * 1. if PLOGI arrived in FW after nport handle has been freed,
4225                   *    FW must have assigned this PLOGI a new/same handle and we
4226                   *    can proceed ACK'ing it as usual when session deletion
4227                   *    completes.
4228                   * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4229                   *    bit reached it, the handle has now been released. We'll
4230                   *    get an error when we ACK this PLOGI. Nothing will be sent
4231                   *    back to initiator. Initiator should eventually retry
4232                   *    PLOGI and situation will correct itself.
4233                   */
4234                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4235                                            (sess->s_id.b24 == port_id.b24));
4236                 qlt_schedule_sess_for_deletion(sess, true);
4237                 break;
4238
4239         case ELS_PRLI:
4240                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4241
4242                 if (wwn)
4243                         sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4244                             loop_id);
4245
4246                 if (sess != NULL) {
4247                         if (sess->deleted) {
4248                                 /*
4249                                  * Impatient initiator sent PRLI before last
4250                                  * PLOGI could finish. Will force him to re-try,
4251                                  * while last one finishes.
4252                                  */
4253                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4254                                     "sess %p PRLI received, before plogi ack.\n",
4255                                     sess);
4256                                 qlt_send_term_imm_notif(vha, iocb, 1);
4257                                 res = 0;
4258                                 break;
4259                         }
4260
4261                         /*
4262                          * This shouldn't happen under normal circumstances,
4263                          * since we have deleted the old session during PLOGI
4264                          */
4265                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4266                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4267                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4268
4269                         sess->local = 0;
4270                         sess->loop_id = loop_id;
4271                         sess->s_id = port_id;
4272
4273                         if (wd3_lo & BIT_7)
4274                                 sess->conf_compl_supported = 1;
4275
4276                 }
4277                 res = 1; /* send notify ack */
4278
4279                 /* Make session global (not used in fabric mode) */
4280                 if (ha->current_topology != ISP_CFG_F) {
4281                         set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4282                         set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4283                         qla2xxx_wake_dpc(vha);
4284                 } else {
4285                         /* todo: else - create sess here. */
4286                         res = 1; /* send notify ack */
4287                 }
4288
4289                 break;
4290
4291         case ELS_LOGO:
4292         case ELS_PRLO:
4293                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4294                 break;
4295         case ELS_PDISC:
4296         case ELS_ADISC:
4297         {
4298                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4299                 if (tgt->link_reinit_iocb_pending) {
4300                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4301                             0, 0, 0, 0, 0, 0);
4302                         tgt->link_reinit_iocb_pending = 0;
4303                 }
4304                 res = 1; /* send notify ack */
4305                 break;
4306         }
4307
4308         case ELS_FLOGI: /* should never happen */
4309         default:
4310                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4311                     "qla_target(%d): Unsupported ELS command %x "
4312                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4313                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4314                 break;
4315         }
4316
4317         return res;
4318 }
4319
4320 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4321 {
4322 #if 1
4323         /*
4324          * FIXME: Reject non zero SRR relative offset until we can test
4325          * this code properly.
4326          */
4327         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4328         return -1;
4329 #else
4330         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4331         size_t first_offset = 0, rem_offset = offset, tmp = 0;
4332         int i, sg_srr_cnt, bufflen = 0;
4333
4334         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4335             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4336             "cmd->sg_cnt: %u, direction: %d\n",
4337             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4338
4339         if (!cmd->sg || !cmd->sg_cnt) {
4340                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4341                     "Missing cmd->sg or zero cmd->sg_cnt in"
4342                     " qla_tgt_set_data_offset\n");
4343                 return -EINVAL;
4344         }
4345         /*
4346          * Walk the current cmd->sg list until we locate the new sg_srr_start
4347          */
4348         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4349                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4350                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4351                     i, sg, sg_page(sg), sg->length, sg->offset);
4352
4353                 if ((sg->length + tmp) > offset) {
4354                         first_offset = rem_offset;
4355                         sg_srr_start = sg;
4356                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4357                             "Found matching sg[%d], using %p as sg_srr_start, "
4358                             "and using first_offset: %zu\n", i, sg,
4359                             first_offset);
4360                         break;
4361                 }
4362                 tmp += sg->length;
4363                 rem_offset -= sg->length;
4364         }
4365
4366         if (!sg_srr_start) {
4367                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4368                     "Unable to locate sg_srr_start for offset: %u\n", offset);
4369                 return -EINVAL;
4370         }
4371         sg_srr_cnt = (cmd->sg_cnt - i);
4372
4373         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4374         if (!sg_srr) {
4375                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4376                     "Unable to allocate sgp\n");
4377                 return -ENOMEM;
4378         }
4379         sg_init_table(sg_srr, sg_srr_cnt);
4380         sgp = &sg_srr[0];
4381         /*
4382          * Walk the remaining list for sg_srr_start, mapping to the newly
4383          * allocated sg_srr taking first_offset into account.
4384          */
4385         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4386                 if (first_offset) {
4387                         sg_set_page(sgp, sg_page(sg),
4388                             (sg->length - first_offset), first_offset);
4389                         first_offset = 0;
4390                 } else {
4391                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
4392                 }
4393                 bufflen += sgp->length;
4394
4395                 sgp = sg_next(sgp);
4396                 if (!sgp)
4397                         break;
4398         }
4399
4400         cmd->sg = sg_srr;
4401         cmd->sg_cnt = sg_srr_cnt;
4402         cmd->bufflen = bufflen;
4403         cmd->offset += offset;
4404         cmd->free_sg = 1;
4405
4406         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4407         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4408             cmd->sg_cnt);
4409         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4410             cmd->bufflen);
4411         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4412             cmd->offset);
4413
4414         if (cmd->sg_cnt < 0)
4415                 BUG();
4416
4417         if (cmd->bufflen < 0)
4418                 BUG();
4419
4420         return 0;
4421 #endif
4422 }
4423
4424 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4425         uint32_t srr_rel_offs, int *xmit_type)
4426 {
4427         int res = 0, rel_offs;
4428
4429         rel_offs = srr_rel_offs - cmd->offset;
4430         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4431             srr_rel_offs, rel_offs);
4432
4433         *xmit_type = QLA_TGT_XMIT_ALL;
4434
4435         if (rel_offs < 0) {
4436                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4437                     "qla_target(%d): SRR rel_offs (%d) < 0",
4438                     cmd->vha->vp_idx, rel_offs);
4439                 res = -1;
4440         } else if (rel_offs == cmd->bufflen)
4441                 *xmit_type = QLA_TGT_XMIT_STATUS;
4442         else if (rel_offs > 0)
4443                 res = qlt_set_data_offset(cmd, rel_offs);
4444
4445         return res;
4446 }
4447
4448 /* No locks, thread context */
4449 static void qlt_handle_srr(struct scsi_qla_host *vha,
4450         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4451 {
4452         struct imm_ntfy_from_isp *ntfy =
4453             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4454         struct qla_hw_data *ha = vha->hw;
4455         struct qla_tgt_cmd *cmd = sctio->cmd;
4456         struct se_cmd *se_cmd = &cmd->se_cmd;
4457         unsigned long flags;
4458         int xmit_type = 0, resp = 0;
4459         uint32_t offset;
4460         uint16_t srr_ui;
4461
4462         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4463         srr_ui = ntfy->u.isp24.srr_ui;
4464
4465         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4466             cmd, srr_ui);
4467
4468         switch (srr_ui) {
4469         case SRR_IU_STATUS:
4470                 spin_lock_irqsave(&ha->hardware_lock, flags);
4471                 qlt_send_notify_ack(vha, ntfy,
4472                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4473                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4474                 xmit_type = QLA_TGT_XMIT_STATUS;
4475                 resp = 1;
4476                 break;
4477         case SRR_IU_DATA_IN:
4478                 if (!cmd->sg || !cmd->sg_cnt) {
4479                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4480                             "Unable to process SRR_IU_DATA_IN due to"
4481                             " missing cmd->sg, state: %d\n", cmd->state);
4482                         dump_stack();
4483                         goto out_reject;
4484                 }
4485                 if (se_cmd->scsi_status != 0) {
4486                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4487                             "Rejecting SRR_IU_DATA_IN with non GOOD "
4488                             "scsi_status\n");
4489                         goto out_reject;
4490                 }
4491                 cmd->bufflen = se_cmd->data_length;
4492
4493                 if (qlt_has_data(cmd)) {
4494                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4495                                 goto out_reject;
4496                         spin_lock_irqsave(&ha->hardware_lock, flags);
4497                         qlt_send_notify_ack(vha, ntfy,
4498                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4499                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4500                         resp = 1;
4501                 } else {
4502                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4503                                "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4504                                vha->vp_idx, se_cmd->tag,
4505                             cmd->se_cmd.scsi_status);
4506                         goto out_reject;
4507                 }
4508                 break;
4509         case SRR_IU_DATA_OUT:
4510                 if (!cmd->sg || !cmd->sg_cnt) {
4511                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4512                             "Unable to process SRR_IU_DATA_OUT due to"
4513                             " missing cmd->sg\n");
4514                         dump_stack();
4515                         goto out_reject;
4516                 }
4517                 if (se_cmd->scsi_status != 0) {
4518                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4519                             "Rejecting SRR_IU_DATA_OUT"
4520                             " with non GOOD scsi_status\n");
4521                         goto out_reject;
4522                 }
4523                 cmd->bufflen = se_cmd->data_length;
4524
4525                 if (qlt_has_data(cmd)) {
4526                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4527                                 goto out_reject;
4528                         spin_lock_irqsave(&ha->hardware_lock, flags);
4529                         qlt_send_notify_ack(vha, ntfy,
4530                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4531                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4532                         if (xmit_type & QLA_TGT_XMIT_DATA) {
4533                                 cmd->cmd_flags |= BIT_8;
4534                                 qlt_rdy_to_xfer(cmd);
4535                         }
4536                 } else {
4537                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4538                             "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4539                                vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4540                         goto out_reject;
4541                 }
4542                 break;
4543         default:
4544                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4545                     "qla_target(%d): Unknown srr_ui value %x",
4546                     vha->vp_idx, srr_ui);
4547                 goto out_reject;
4548         }
4549
4550         /* Transmit response in case of status and data-in cases */
4551         if (resp) {
4552                 cmd->cmd_flags |= BIT_7;
4553                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4554         }
4555
4556         return;
4557
4558 out_reject:
4559         spin_lock_irqsave(&ha->hardware_lock, flags);
4560         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4561             NOTIFY_ACK_SRR_FLAGS_REJECT,
4562             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4563             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4564         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4565                 cmd->state = QLA_TGT_STATE_DATA_IN;
4566                 dump_stack();
4567         } else {
4568                 cmd->cmd_flags |= BIT_9;
4569                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
4570         }
4571         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4572 }
4573
4574 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4575         struct qla_tgt_srr_imm *imm, int ha_locked)
4576 {
4577         struct qla_hw_data *ha = vha->hw;
4578         unsigned long flags = 0;
4579
4580         if (!ha_locked)
4581                 spin_lock_irqsave(&ha->hardware_lock, flags);
4582
4583         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4584             NOTIFY_ACK_SRR_FLAGS_REJECT,
4585             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4586             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4587
4588         if (!ha_locked)
4589                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4590
4591         kfree(imm);
4592 }
4593
4594 static void qlt_handle_srr_work(struct work_struct *work)
4595 {
4596         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4597         struct scsi_qla_host *vha = tgt->vha;
4598         struct qla_tgt_srr_ctio *sctio;
4599         unsigned long flags;
4600
4601         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4602             tgt);
4603
4604 restart:
4605         spin_lock_irqsave(&tgt->srr_lock, flags);
4606         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4607                 struct qla_tgt_srr_imm *imm, *i, *ti;
4608                 struct qla_tgt_cmd *cmd;
4609                 struct se_cmd *se_cmd;
4610
4611                 imm = NULL;
4612                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4613                                                 srr_list_entry) {
4614                         if (i->srr_id == sctio->srr_id) {
4615                                 list_del(&i->srr_list_entry);
4616                                 if (imm) {
4617                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4618                                           "qla_target(%d): There must be "
4619                                           "only one IMM SRR per CTIO SRR "
4620                                           "(IMM SRR %p, id %d, CTIO %p\n",
4621                                           vha->vp_idx, i, i->srr_id, sctio);
4622                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4623                                 } else
4624                                         imm = i;
4625                         }
4626                 }
4627
4628                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4629                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4630                     sctio->srr_id);
4631
4632                 if (imm == NULL) {
4633                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4634                             "Not found matching IMM for SRR CTIO (id %d)\n",
4635                             sctio->srr_id);
4636                         continue;
4637                 } else
4638                         list_del(&sctio->srr_list_entry);
4639
4640                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4641
4642                 cmd = sctio->cmd;
4643                 /*
4644                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4645                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4646                  * logic..
4647                  */
4648                 cmd->offset = 0;
4649                 if (cmd->free_sg) {
4650                         kfree(cmd->sg);
4651                         cmd->sg = NULL;
4652                         cmd->free_sg = 0;
4653                 }
4654                 se_cmd = &cmd->se_cmd;
4655
4656                 cmd->sg_cnt = se_cmd->t_data_nents;
4657                 cmd->sg = se_cmd->t_data_sg;
4658
4659                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4660                        "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4661                        cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4662                        se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4663
4664                 qlt_handle_srr(vha, sctio, imm);
4665
4666                 kfree(imm);
4667                 kfree(sctio);
4668                 goto restart;
4669         }
4670         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4671 }
4672
4673 /* ha->hardware_lock supposed to be held on entry */
4674 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4675         struct imm_ntfy_from_isp *iocb)
4676 {
4677         struct qla_tgt_srr_imm *imm;
4678         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4679         struct qla_tgt_srr_ctio *sctio;
4680
4681         tgt->imm_srr_id++;
4682
4683         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4684             vha->vp_idx);
4685
4686         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4687         if (imm != NULL) {
4688                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4689
4690                 /* IRQ is already OFF */
4691                 spin_lock(&tgt->srr_lock);
4692                 imm->srr_id = tgt->imm_srr_id;
4693                 list_add_tail(&imm->srr_list_entry,
4694                     &tgt->srr_imm_list);
4695                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4696                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4697                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4698                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4699                         int found = 0;
4700                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4701                             srr_list_entry) {
4702                                 if (sctio->srr_id == imm->srr_id) {
4703                                         found = 1;
4704                                         break;
4705                                 }
4706                         }
4707                         if (found) {
4708                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4709                                     "Scheduling srr work\n");
4710                                 schedule_work(&tgt->srr_work);
4711                         } else {
4712                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4713                                     "qla_target(%d): imm_srr_id "
4714                                     "== ctio_srr_id (%d), but there is no "
4715                                     "corresponding SRR CTIO, deleting IMM "
4716                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4717                                     imm);
4718                                 list_del(&imm->srr_list_entry);
4719
4720                                 kfree(imm);
4721
4722                                 spin_unlock(&tgt->srr_lock);
4723                                 goto out_reject;
4724                         }
4725                 }
4726                 spin_unlock(&tgt->srr_lock);
4727         } else {
4728                 struct qla_tgt_srr_ctio *ts;
4729
4730                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4731                     "qla_target(%d): Unable to allocate SRR IMM "
4732                     "entry, SRR request will be rejected\n", vha->vp_idx);
4733
4734                 /* IRQ is already OFF */
4735                 spin_lock(&tgt->srr_lock);
4736                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4737                     srr_list_entry) {
4738                         if (sctio->srr_id == tgt->imm_srr_id) {
4739                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4740                                     "CTIO SRR %p deleted (id %d)\n",
4741                                     sctio, sctio->srr_id);
4742                                 list_del(&sctio->srr_list_entry);
4743                                 qlt_send_term_exchange(vha, sctio->cmd,
4744                                     &sctio->cmd->atio, 1);
4745                                 kfree(sctio);
4746                         }
4747                 }
4748                 spin_unlock(&tgt->srr_lock);
4749                 goto out_reject;
4750         }
4751
4752         return;
4753
4754 out_reject:
4755         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4756             NOTIFY_ACK_SRR_FLAGS_REJECT,
4757             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4758             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4759 }
4760
4761 /*
4762  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4763  */
4764 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4765         struct imm_ntfy_from_isp *iocb)
4766 {
4767         struct qla_hw_data *ha = vha->hw;
4768         uint32_t add_flags = 0;
4769         int send_notify_ack = 1;
4770         uint16_t status;
4771
4772         status = le16_to_cpu(iocb->u.isp2x.status);
4773         switch (status) {
4774         case IMM_NTFY_LIP_RESET:
4775         {
4776                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4777                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4778                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4779                     iocb->u.isp24.status_subcode);
4780
4781                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4782                         send_notify_ack = 0;
4783                 break;
4784         }
4785
4786         case IMM_NTFY_LIP_LINK_REINIT:
4787         {
4788                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4789                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4790                     "qla_target(%d): LINK REINIT (loop %#x, "
4791                     "subcode %x)\n", vha->vp_idx,
4792                     le16_to_cpu(iocb->u.isp24.nport_handle),
4793                     iocb->u.isp24.status_subcode);
4794                 if (tgt->link_reinit_iocb_pending) {
4795                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4796                             0, 0, 0, 0, 0, 0);
4797                 }
4798                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4799                 tgt->link_reinit_iocb_pending = 1;
4800                 /*
4801                  * QLogic requires to wait after LINK REINIT for possible
4802                  * PDISC or ADISC ELS commands
4803                  */
4804                 send_notify_ack = 0;
4805                 break;
4806         }
4807
4808         case IMM_NTFY_PORT_LOGOUT:
4809                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4810                     "qla_target(%d): Port logout (loop "
4811                     "%#x, subcode %x)\n", vha->vp_idx,
4812                     le16_to_cpu(iocb->u.isp24.nport_handle),
4813                     iocb->u.isp24.status_subcode);
4814
4815                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4816                         send_notify_ack = 0;
4817                 /* The sessions will be cleared in the callback, if needed */
4818                 break;
4819
4820         case IMM_NTFY_GLBL_TPRLO:
4821                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4822                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4823                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4824                         send_notify_ack = 0;
4825                 /* The sessions will be cleared in the callback, if needed */
4826                 break;
4827
4828         case IMM_NTFY_PORT_CONFIG:
4829                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4830                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4831                     status);
4832                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4833                         send_notify_ack = 0;
4834                 /* The sessions will be cleared in the callback, if needed */
4835                 break;
4836
4837         case IMM_NTFY_GLBL_LOGO:
4838                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4839                     "qla_target(%d): Link failure detected\n",
4840                     vha->vp_idx);
4841                 /* I_T nexus loss */
4842                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4843                         send_notify_ack = 0;
4844                 break;
4845
4846         case IMM_NTFY_IOCB_OVERFLOW:
4847                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4848                     "qla_target(%d): Cannot provide requested "
4849                     "capability (IOCB overflowed the immediate notify "
4850                     "resource count)\n", vha->vp_idx);
4851                 break;
4852
4853         case IMM_NTFY_ABORT_TASK:
4854                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4855                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4856                     "L %#x)\n", vha->vp_idx,
4857                     le16_to_cpu(iocb->u.isp2x.seq_id),
4858                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4859                     le16_to_cpu(iocb->u.isp2x.lun));
4860                 if (qlt_abort_task(vha, iocb) == 0)
4861                         send_notify_ack = 0;
4862                 break;
4863
4864         case IMM_NTFY_RESOURCE:
4865                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4866                     "qla_target(%d): Out of resources, host %ld\n",
4867                     vha->vp_idx, vha->host_no);
4868                 break;
4869
4870         case IMM_NTFY_MSG_RX:
4871                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4872                     "qla_target(%d): Immediate notify task %x\n",
4873                     vha->vp_idx, iocb->u.isp2x.task_flags);
4874                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4875                         send_notify_ack = 0;
4876                 break;
4877
4878         case IMM_NTFY_ELS:
4879                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4880                         send_notify_ack = 0;
4881                 break;
4882
4883         case IMM_NTFY_SRR:
4884                 qlt_prepare_srr_imm(vha, iocb);
4885                 send_notify_ack = 0;
4886                 break;
4887
4888         default:
4889                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4890                     "qla_target(%d): Received unknown immediate "
4891                     "notify status %x\n", vha->vp_idx, status);
4892                 break;
4893         }
4894
4895         if (send_notify_ack)
4896                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4897 }
4898
4899 /*
4900  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4901  * This function sends busy to ISP 2xxx or 24xx.
4902  */
4903 static int __qlt_send_busy(struct scsi_qla_host *vha,
4904         struct atio_from_isp *atio, uint16_t status)
4905 {
4906         struct ctio7_to_24xx *ctio24;
4907         struct qla_hw_data *ha = vha->hw;
4908         request_t *pkt;
4909         struct qla_tgt_sess *sess = NULL;
4910
4911         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4912             atio->u.isp24.fcp_hdr.s_id);
4913         if (!sess) {
4914                 qlt_send_term_exchange(vha, NULL, atio, 1);
4915                 return 0;
4916         }
4917         /* Sending marker isn't necessary, since we called from ISR */
4918
4919         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4920         if (!pkt) {
4921                 ql_dbg(ql_dbg_io, vha, 0x3063,
4922                     "qla_target(%d): %s failed: unable to allocate "
4923                     "request packet", vha->vp_idx, __func__);
4924                 return -ENOMEM;
4925         }
4926
4927         pkt->entry_count = 1;
4928         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4929
4930         ctio24 = (struct ctio7_to_24xx *)pkt;
4931         ctio24->entry_type = CTIO_TYPE7;
4932         ctio24->nport_handle = sess->loop_id;
4933         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4934         ctio24->vp_index = vha->vp_idx;
4935         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4936         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4937         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4938         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4939         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4940             __constant_cpu_to_le16(
4941                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4942                 CTIO7_FLAGS_DONT_RET_CTIO);
4943         /*
4944          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4945          * if the explicit conformation is used.
4946          */
4947         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4948         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4949         /* Memory Barrier */
4950         wmb();
4951         qla2x00_start_iocbs(vha, vha->req);
4952         return 0;
4953 }
4954
4955 /*
4956  * This routine is used to allocate a command for either a QFull condition
4957  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4958  * out previously.
4959  */
4960 static void
4961 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4962         struct atio_from_isp *atio, uint16_t status, int qfull)
4963 {
4964         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4965         struct qla_hw_data *ha = vha->hw;
4966         struct qla_tgt_sess *sess;
4967         struct se_session *se_sess;
4968         struct qla_tgt_cmd *cmd;
4969         int tag;
4970
4971         if (unlikely(tgt->tgt_stop)) {
4972                 ql_dbg(ql_dbg_io, vha, 0x300a,
4973                         "New command while device %p is shutting down\n", tgt);
4974                 return;
4975         }
4976
4977         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4978                 vha->hw->tgt.num_qfull_cmds_dropped++;
4979                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4980                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4981                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4982                                 vha->hw->tgt.num_qfull_cmds_dropped;
4983
4984                 ql_dbg(ql_dbg_io, vha, 0x3068,
4985                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4986                         vha->vp_idx, __func__,
4987                         vha->hw->tgt.num_qfull_cmds_dropped);
4988
4989                 qlt_chk_exch_leak_thresh_hold(vha);
4990                 return;
4991         }
4992
4993         sess = ha->tgt.tgt_ops->find_sess_by_s_id
4994                 (vha, atio->u.isp24.fcp_hdr.s_id);
4995         if (!sess)
4996                 return;
4997
4998         se_sess = sess->se_sess;
4999
5000         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5001         if (tag < 0)
5002                 return;
5003
5004         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5005         if (!cmd) {
5006                 ql_dbg(ql_dbg_io, vha, 0x3009,
5007                         "qla_target(%d): %s: Allocation of cmd failed\n",
5008                         vha->vp_idx, __func__);
5009
5010                 vha->hw->tgt.num_qfull_cmds_dropped++;
5011                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5012                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
5013                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
5014                                 vha->hw->tgt.num_qfull_cmds_dropped;
5015
5016                 qlt_chk_exch_leak_thresh_hold(vha);
5017                 return;
5018         }
5019
5020         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5021
5022         qlt_incr_num_pend_cmds(vha);
5023         INIT_LIST_HEAD(&cmd->cmd_list);
5024         memcpy(&cmd->atio, atio, sizeof(*atio));
5025
5026         cmd->tgt = vha->vha_tgt.qla_tgt;
5027         cmd->vha = vha;
5028         cmd->reset_count = vha->hw->chip_reset;
5029         cmd->q_full = 1;
5030
5031         if (qfull) {
5032                 cmd->q_full = 1;
5033                 /* NOTE: borrowing the state field to carry the status */
5034                 cmd->state = status;
5035         } else
5036                 cmd->term_exchg = 1;
5037
5038         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5039
5040         vha->hw->tgt.num_qfull_cmds_alloc++;
5041         if (vha->hw->tgt.num_qfull_cmds_alloc >
5042                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
5043                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
5044                         vha->hw->tgt.num_qfull_cmds_alloc;
5045 }
5046
5047 int
5048 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5049 {
5050         struct qla_hw_data *ha = vha->hw;
5051         unsigned long flags;
5052         struct qla_tgt_cmd *cmd, *tcmd;
5053         struct list_head free_list;
5054         int rc = 0;
5055
5056         if (list_empty(&ha->tgt.q_full_list))
5057                 return 0;
5058
5059         INIT_LIST_HEAD(&free_list);
5060
5061         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5062
5063         if (list_empty(&ha->tgt.q_full_list)) {
5064                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5065                 return 0;
5066         }
5067
5068         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5069                 if (cmd->q_full)
5070                         /* cmd->state is a borrowed field to hold status */
5071                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5072                 else if (cmd->term_exchg)
5073                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5074
5075                 if (rc == -ENOMEM)
5076                         break;
5077
5078                 if (cmd->q_full)
5079                         ql_dbg(ql_dbg_io, vha, 0x3006,
5080                             "%s: busy sent for ox_id[%04x]\n", __func__,
5081                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5082                 else if (cmd->term_exchg)
5083                         ql_dbg(ql_dbg_io, vha, 0x3007,
5084                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5085                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5086                 else
5087                         ql_dbg(ql_dbg_io, vha, 0x3008,
5088                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5089                             cmd);
5090
5091                 list_del(&cmd->cmd_list);
5092                 list_add_tail(&cmd->cmd_list, &free_list);
5093
5094                 /* piggy back on hardware_lock for protection */
5095                 vha->hw->tgt.num_qfull_cmds_alloc--;
5096         }
5097         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5098
5099         cmd = NULL;
5100
5101         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5102                 list_del(&cmd->cmd_list);
5103                 /* This cmd was never sent to TCM.  There is no need
5104                  * to schedule free or call free_cmd
5105                  */
5106                 qlt_free_cmd(cmd);
5107         }
5108         return rc;
5109 }
5110
5111 static void
5112 qlt_send_busy(struct scsi_qla_host *vha,
5113         struct atio_from_isp *atio, uint16_t status)
5114 {
5115         int rc = 0;
5116
5117         rc = __qlt_send_busy(vha, atio, status);
5118         if (rc == -ENOMEM)
5119                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5120 }
5121
5122 static int
5123 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5124         struct atio_from_isp *atio)
5125 {
5126         struct qla_hw_data *ha = vha->hw;
5127         uint16_t status;
5128
5129         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5130                 return 0;
5131
5132         status = temp_sam_status;
5133         qlt_send_busy(vha, atio, status);
5134         return 1;
5135 }
5136
5137 /* ha->hardware_lock supposed to be held on entry */
5138 /* called via callback from qla2xxx */
5139 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5140         struct atio_from_isp *atio)
5141 {
5142         struct qla_hw_data *ha = vha->hw;
5143         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5144         int rc;
5145
5146         if (unlikely(tgt == NULL)) {
5147                 ql_dbg(ql_dbg_io, vha, 0x3064,
5148                     "ATIO pkt, but no tgt (ha %p)", ha);
5149                 return;
5150         }
5151         /*
5152          * In tgt_stop mode we also should allow all requests to pass.
5153          * Otherwise, some commands can stuck.
5154          */
5155
5156         tgt->irq_cmd_count++;
5157
5158         switch (atio->u.raw.entry_type) {
5159         case ATIO_TYPE7:
5160                 if (unlikely(atio->u.isp24.exchange_addr ==
5161                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5162                         ql_dbg(ql_dbg_io, vha, 0x3065,
5163                             "qla_target(%d): ATIO_TYPE7 "
5164                             "received with UNKNOWN exchange address, "
5165                             "sending QUEUE_FULL\n", vha->vp_idx);
5166                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5167                         break;
5168                 }
5169
5170
5171
5172                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5173                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
5174                         if (rc != 0) {
5175                                 tgt->irq_cmd_count--;
5176                                 return;
5177                         }
5178                         rc = qlt_handle_cmd_for_atio(vha, atio);
5179                 } else {
5180                         rc = qlt_handle_task_mgmt(vha, atio);
5181                 }
5182                 if (unlikely(rc != 0)) {
5183                         if (rc == -ESRCH) {
5184 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5185                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5186 #else
5187                                 qlt_send_term_exchange(vha, NULL, atio, 1);
5188 #endif
5189                         } else {
5190                                 if (tgt->tgt_stop) {
5191                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5192                                             "qla_target: Unable to send "
5193                                             "command to target for req, "
5194                                             "ignoring.\n");
5195                                 } else {
5196                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5197                                             "qla_target(%d): Unable to send "
5198                                             "command to target, sending BUSY "
5199                                             "status.\n", vha->vp_idx);
5200                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5201                                 }
5202                         }
5203                 }
5204                 break;
5205
5206         case IMMED_NOTIFY_TYPE:
5207         {
5208                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5209                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5210                             "qla_target(%d): Received ATIO packet %x "
5211                             "with error status %x\n", vha->vp_idx,
5212                             atio->u.raw.entry_type,
5213                             atio->u.isp2x.entry_status);
5214                         break;
5215                 }
5216                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5217                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5218                 break;
5219         }
5220
5221         default:
5222                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5223                     "qla_target(%d): Received unknown ATIO atio "
5224                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5225                 break;
5226         }
5227
5228         tgt->irq_cmd_count--;
5229 }
5230
5231 /* ha->hardware_lock supposed to be held on entry */
5232 /* called via callback from qla2xxx */
5233 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5234 {
5235         struct qla_hw_data *ha = vha->hw;
5236         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5237
5238         if (unlikely(tgt == NULL)) {
5239                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5240                     "qla_target(%d): Response pkt %x received, but no "
5241                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5242                 return;
5243         }
5244
5245         /*
5246          * In tgt_stop mode we also should allow all requests to pass.
5247          * Otherwise, some commands can stuck.
5248          */
5249
5250         tgt->irq_cmd_count++;
5251
5252         switch (pkt->entry_type) {
5253         case CTIO_CRC2:
5254         case CTIO_TYPE7:
5255         {
5256                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5257                 qlt_do_ctio_completion(vha, entry->handle,
5258                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5259                     entry);
5260                 break;
5261         }
5262
5263         case ACCEPT_TGT_IO_TYPE:
5264         {
5265                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5266                 int rc;
5267                 if (atio->u.isp2x.status !=
5268                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
5269                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5270                             "qla_target(%d): ATIO with error "
5271                             "status %x received\n", vha->vp_idx,
5272                             le16_to_cpu(atio->u.isp2x.status));
5273                         break;
5274                 }
5275
5276                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5277                 if (rc != 0) {
5278                         tgt->irq_cmd_count--;
5279                         return;
5280                 }
5281
5282                 rc = qlt_handle_cmd_for_atio(vha, atio);
5283                 if (unlikely(rc != 0)) {
5284                         if (rc == -ESRCH) {
5285 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5286                                 qlt_send_busy(vha, atio, 0);
5287 #else
5288                                 qlt_send_term_exchange(vha, NULL, atio, 1);
5289 #endif
5290                         } else {
5291                                 if (tgt->tgt_stop) {
5292                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5293                                             "qla_target: Unable to send "
5294                                             "command to target, sending TERM "
5295                                             "EXCHANGE for rsp\n");
5296                                         qlt_send_term_exchange(vha, NULL,
5297                                             atio, 1);
5298                                 } else {
5299                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5300                                             "qla_target(%d): Unable to send "
5301                                             "command to target, sending BUSY "
5302                                             "status\n", vha->vp_idx);
5303                                         qlt_send_busy(vha, atio, 0);
5304                                 }
5305                         }
5306                 }
5307         }
5308         break;
5309
5310         case CONTINUE_TGT_IO_TYPE:
5311         {
5312                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5313                 qlt_do_ctio_completion(vha, entry->handle,
5314                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5315                     entry);
5316                 break;
5317         }
5318
5319         case CTIO_A64_TYPE:
5320         {
5321                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5322                 qlt_do_ctio_completion(vha, entry->handle,
5323                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5324                     entry);
5325                 break;
5326         }
5327
5328         case IMMED_NOTIFY_TYPE:
5329                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5330                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5331                 break;
5332
5333         case NOTIFY_ACK_TYPE:
5334                 if (tgt->notify_ack_expected > 0) {
5335                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5336                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5337                             "NOTIFY_ACK seq %08x status %x\n",
5338                             le16_to_cpu(entry->u.isp2x.seq_id),
5339                             le16_to_cpu(entry->u.isp2x.status));
5340                         tgt->notify_ack_expected--;
5341                         if (entry->u.isp2x.status !=
5342                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5343                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5344                                     "qla_target(%d): NOTIFY_ACK "
5345                                     "failed %x\n", vha->vp_idx,
5346                                     le16_to_cpu(entry->u.isp2x.status));
5347                         }
5348                 } else {
5349                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5350                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5351                             vha->vp_idx);
5352                 }
5353                 break;
5354
5355         case ABTS_RECV_24XX:
5356                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5357                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5358                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5359                 break;
5360
5361         case ABTS_RESP_24XX:
5362                 if (tgt->abts_resp_expected > 0) {
5363                         struct abts_resp_from_24xx_fw *entry =
5364                                 (struct abts_resp_from_24xx_fw *)pkt;
5365                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5366                             "ABTS_RESP_24XX: compl_status %x\n",
5367                             entry->compl_status);
5368                         tgt->abts_resp_expected--;
5369                         if (le16_to_cpu(entry->compl_status) !=
5370                             ABTS_RESP_COMPL_SUCCESS) {
5371                                 if ((entry->error_subcode1 == 0x1E) &&
5372                                     (entry->error_subcode2 == 0)) {
5373                                         /*
5374                                          * We've got a race here: aborted
5375                                          * exchange not terminated, i.e.
5376                                          * response for the aborted command was
5377                                          * sent between the abort request was
5378                                          * received and processed.
5379                                          * Unfortunately, the firmware has a
5380                                          * silly requirement that all aborted
5381                                          * exchanges must be explicitely
5382                                          * terminated, otherwise it refuses to
5383                                          * send responses for the abort
5384                                          * requests. So, we have to
5385                                          * (re)terminate the exchange and retry
5386                                          * the abort response.
5387                                          */
5388                                         qlt_24xx_retry_term_exchange(vha,
5389                                             entry);
5390                                 } else
5391                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5392                                             "qla_target(%d): ABTS_RESP_24XX "
5393                                             "failed %x (subcode %x:%x)",
5394                                             vha->vp_idx, entry->compl_status,
5395                                             entry->error_subcode1,
5396                                             entry->error_subcode2);
5397                         }
5398                 } else {
5399                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5400                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5401                             "received\n", vha->vp_idx);
5402                 }
5403                 break;
5404
5405         default:
5406                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5407                     "qla_target(%d): Received unknown response pkt "
5408                     "type %x\n", vha->vp_idx, pkt->entry_type);
5409                 break;
5410         }
5411
5412         tgt->irq_cmd_count--;
5413 }
5414
5415 /*
5416  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5417  */
5418 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5419         uint16_t *mailbox)
5420 {
5421         struct qla_hw_data *ha = vha->hw;
5422         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5423         int login_code;
5424
5425         if (!ha->tgt.tgt_ops)
5426                 return;
5427
5428         if (unlikely(tgt == NULL)) {
5429                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5430                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5431                 return;
5432         }
5433
5434         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5435             IS_QLA2100(ha))
5436                 return;
5437         /*
5438          * In tgt_stop mode we also should allow all requests to pass.
5439          * Otherwise, some commands can stuck.
5440          */
5441
5442         tgt->irq_cmd_count++;
5443
5444         switch (code) {
5445         case MBA_RESET:                 /* Reset */
5446         case MBA_SYSTEM_ERR:            /* System Error */
5447         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5448         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5449                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5450                     "qla_target(%d): System error async event %#x "
5451                     "occurred", vha->vp_idx, code);
5452                 break;
5453         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5454                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5455                 break;
5456
5457         case MBA_LOOP_UP:
5458         {
5459                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5460                     "qla_target(%d): Async LOOP_UP occurred "
5461                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5462                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5463                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5464                 if (tgt->link_reinit_iocb_pending) {
5465                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5466                             0, 0, 0, 0, 0, 0);
5467                         tgt->link_reinit_iocb_pending = 0;
5468                 }
5469                 break;
5470         }
5471
5472         case MBA_LIP_OCCURRED:
5473         case MBA_LOOP_DOWN:
5474         case MBA_LIP_RESET:
5475         case MBA_RSCN_UPDATE:
5476                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5477                     "qla_target(%d): Async event %#x occurred "
5478                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5479                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5480                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5481                 break;
5482
5483         case MBA_PORT_UPDATE:
5484                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5485                     "qla_target(%d): Port update async event %#x "
5486                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5487                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5488                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5489                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5490
5491                 login_code = le16_to_cpu(mailbox[2]);
5492                 if (login_code == 0x4)
5493                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5494                             "Async MB 2: Got PLOGI Complete\n");
5495                 else if (login_code == 0x7)
5496                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5497                             "Async MB 2: Port Logged Out\n");
5498                 break;
5499
5500         default:
5501                 break;
5502         }
5503
5504         tgt->irq_cmd_count--;
5505 }
5506
5507 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5508         uint16_t loop_id)
5509 {
5510         fc_port_t *fcport;
5511         int rc;
5512
5513         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5514         if (!fcport) {
5515                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5516                     "qla_target(%d): Allocation of tmp FC port failed",
5517                     vha->vp_idx);
5518                 return NULL;
5519         }
5520
5521         fcport->loop_id = loop_id;
5522
5523         rc = qla2x00_get_port_database(vha, fcport, 0);
5524         if (rc != QLA_SUCCESS) {
5525                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5526                     "qla_target(%d): Failed to retrieve fcport "
5527                     "information -- get_port_database() returned %x "
5528                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5529                 kfree(fcport);
5530                 return NULL;
5531         }
5532
5533         return fcport;
5534 }
5535
5536 /* Must be called under tgt_mutex */
5537 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5538         uint8_t *s_id)
5539 {
5540         struct qla_tgt_sess *sess = NULL;
5541         fc_port_t *fcport = NULL;
5542         int rc, global_resets;
5543         uint16_t loop_id = 0;
5544
5545 retry:
5546         global_resets =
5547             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5548
5549         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5550         if (rc != 0) {
5551                 if ((s_id[0] == 0xFF) &&
5552                     (s_id[1] == 0xFC)) {
5553                         /*
5554                          * This is Domain Controller, so it should be
5555                          * OK to drop SCSI commands from it.
5556                          */
5557                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5558                             "Unable to find initiator with S_ID %x:%x:%x",
5559                             s_id[0], s_id[1], s_id[2]);
5560                 } else
5561                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
5562                             "qla_target(%d): Unable to find "
5563                             "initiator with S_ID %x:%x:%x",
5564                             vha->vp_idx, s_id[0], s_id[1],
5565                             s_id[2]);
5566                 return NULL;
5567         }
5568
5569         fcport = qlt_get_port_database(vha, loop_id);
5570         if (!fcport)
5571                 return NULL;
5572
5573         if (global_resets !=
5574             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5575                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5576                     "qla_target(%d): global reset during session discovery "
5577                     "(counter was %d, new %d), retrying", vha->vp_idx,
5578                     global_resets,
5579                     atomic_read(&vha->vha_tgt.
5580                         qla_tgt->tgt_global_resets_count));
5581                 goto retry;
5582         }
5583
5584         sess = qlt_create_sess(vha, fcport, true);
5585
5586         kfree(fcport);
5587         return sess;
5588 }
5589
5590 static void qlt_abort_work(struct qla_tgt *tgt,
5591         struct qla_tgt_sess_work_param *prm)
5592 {
5593         struct scsi_qla_host *vha = tgt->vha;
5594         struct qla_hw_data *ha = vha->hw;
5595         struct qla_tgt_sess *sess = NULL;
5596         unsigned long flags;
5597         uint32_t be_s_id;
5598         uint8_t s_id[3];
5599         int rc;
5600
5601         spin_lock_irqsave(&ha->hardware_lock, flags);
5602
5603         if (tgt->tgt_stop)
5604                 goto out_term;
5605
5606         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5607         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5608         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5609
5610         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5611             (unsigned char *)&be_s_id);
5612         if (!sess) {
5613                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5614
5615                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5616                 sess = qlt_make_local_sess(vha, s_id);
5617                 /* sess has got an extra creation ref */
5618                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5619
5620                 spin_lock_irqsave(&ha->hardware_lock, flags);
5621                 if (!sess)
5622                         goto out_term;
5623         } else {
5624                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5625                         sess = NULL;
5626                         goto out_term;
5627                 }
5628
5629                 kref_get(&sess->se_sess->sess_kref);
5630         }
5631
5632         if (tgt->tgt_stop)
5633                 goto out_term;
5634
5635         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5636         if (rc != 0)
5637                 goto out_term;
5638
5639         ha->tgt.tgt_ops->put_sess(sess);
5640         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5641         return;
5642
5643 out_term:
5644         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5645         if (sess)
5646                 ha->tgt.tgt_ops->put_sess(sess);
5647         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5648 }
5649
5650 static void qlt_tmr_work(struct qla_tgt *tgt,
5651         struct qla_tgt_sess_work_param *prm)
5652 {
5653         struct atio_from_isp *a = &prm->tm_iocb2;
5654         struct scsi_qla_host *vha = tgt->vha;
5655         struct qla_hw_data *ha = vha->hw;
5656         struct qla_tgt_sess *sess = NULL;
5657         unsigned long flags;
5658         uint8_t *s_id = NULL; /* to hide compiler warnings */
5659         int rc;
5660         uint32_t lun, unpacked_lun;
5661         int lun_size, fn;
5662         void *iocb;
5663
5664         spin_lock_irqsave(&ha->hardware_lock, flags);
5665
5666         if (tgt->tgt_stop)
5667                 goto out_term;
5668
5669         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5670         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5671         if (!sess) {
5672                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5673
5674                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5675                 sess = qlt_make_local_sess(vha, s_id);
5676                 /* sess has got an extra creation ref */
5677                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5678
5679                 spin_lock_irqsave(&ha->hardware_lock, flags);
5680                 if (!sess)
5681                         goto out_term;
5682         } else {
5683                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5684                         sess = NULL;
5685                         goto out_term;
5686                 }
5687
5688                 kref_get(&sess->se_sess->sess_kref);
5689         }
5690
5691         iocb = a;
5692         lun = a->u.isp24.fcp_cmnd.lun;
5693         lun_size = sizeof(lun);
5694         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5695         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5696
5697         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5698         if (rc != 0)
5699                 goto out_term;
5700
5701         ha->tgt.tgt_ops->put_sess(sess);
5702         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5703         return;
5704
5705 out_term:
5706         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5707         if (sess)
5708                 ha->tgt.tgt_ops->put_sess(sess);
5709         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5710 }
5711
5712 static void qlt_sess_work_fn(struct work_struct *work)
5713 {
5714         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5715         struct scsi_qla_host *vha = tgt->vha;
5716         unsigned long flags;
5717
5718         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5719
5720         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5721         while (!list_empty(&tgt->sess_works_list)) {
5722                 struct qla_tgt_sess_work_param *prm = list_entry(
5723                     tgt->sess_works_list.next, typeof(*prm),
5724                     sess_works_list_entry);
5725
5726                 /*
5727                  * This work can be scheduled on several CPUs at time, so we
5728                  * must delete the entry to eliminate double processing
5729                  */
5730                 list_del(&prm->sess_works_list_entry);
5731
5732                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5733
5734                 switch (prm->type) {
5735                 case QLA_TGT_SESS_WORK_ABORT:
5736                         qlt_abort_work(tgt, prm);
5737                         break;
5738                 case QLA_TGT_SESS_WORK_TM:
5739                         qlt_tmr_work(tgt, prm);
5740                         break;
5741                 default:
5742                         BUG_ON(1);
5743                         break;
5744                 }
5745
5746                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5747
5748                 kfree(prm);
5749         }
5750         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5751 }
5752
5753 /* Must be called under tgt_host_action_mutex */
5754 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5755 {
5756         struct qla_tgt *tgt;
5757
5758         if (!QLA_TGT_MODE_ENABLED())
5759                 return 0;
5760
5761         if (!IS_TGT_MODE_CAPABLE(ha)) {
5762                 ql_log(ql_log_warn, base_vha, 0xe070,
5763                     "This adapter does not support target mode.\n");
5764                 return 0;
5765         }
5766
5767         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5768             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5769
5770         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5771
5772         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5773         if (!tgt) {
5774                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5775                     "Unable to allocate struct qla_tgt\n");
5776                 return -ENOMEM;
5777         }
5778
5779         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5780                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5781
5782         tgt->ha = ha;
5783         tgt->vha = base_vha;
5784         init_waitqueue_head(&tgt->waitQ);
5785         INIT_LIST_HEAD(&tgt->sess_list);
5786         INIT_LIST_HEAD(&tgt->del_sess_list);
5787         INIT_DELAYED_WORK(&tgt->sess_del_work,
5788                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5789         spin_lock_init(&tgt->sess_work_lock);
5790         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5791         INIT_LIST_HEAD(&tgt->sess_works_list);
5792         spin_lock_init(&tgt->srr_lock);
5793         INIT_LIST_HEAD(&tgt->srr_ctio_list);
5794         INIT_LIST_HEAD(&tgt->srr_imm_list);
5795         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5796         atomic_set(&tgt->tgt_global_resets_count, 0);
5797
5798         base_vha->vha_tgt.qla_tgt = tgt;
5799
5800         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5801                 "qla_target(%d): using 64 Bit PCI addressing",
5802                 base_vha->vp_idx);
5803         tgt->tgt_enable_64bit_addr = 1;
5804         /* 3 is reserved */
5805         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5806         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5807         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5808
5809         if (base_vha->fc_vport)
5810                 return 0;
5811
5812         mutex_lock(&qla_tgt_mutex);
5813         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5814         mutex_unlock(&qla_tgt_mutex);
5815
5816         return 0;
5817 }
5818
5819 /* Must be called under tgt_host_action_mutex */
5820 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5821 {
5822         if (!vha->vha_tgt.qla_tgt)
5823                 return 0;
5824
5825         if (vha->fc_vport) {
5826                 qlt_release(vha->vha_tgt.qla_tgt);
5827                 return 0;
5828         }
5829
5830         /* free left over qfull cmds */
5831         qlt_init_term_exchange(vha);
5832
5833         mutex_lock(&qla_tgt_mutex);
5834         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5835         mutex_unlock(&qla_tgt_mutex);
5836
5837         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5838             vha->host_no, ha);
5839         qlt_release(vha->vha_tgt.qla_tgt);
5840
5841         return 0;
5842 }
5843
5844 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5845         unsigned char *b)
5846 {
5847         int i;
5848
5849         pr_debug("qla2xxx HW vha->node_name: ");
5850         for (i = 0; i < WWN_SIZE; i++)
5851                 pr_debug("%02x ", vha->node_name[i]);
5852         pr_debug("\n");
5853         pr_debug("qla2xxx HW vha->port_name: ");
5854         for (i = 0; i < WWN_SIZE; i++)
5855                 pr_debug("%02x ", vha->port_name[i]);
5856         pr_debug("\n");
5857
5858         pr_debug("qla2xxx passed configfs WWPN: ");
5859         put_unaligned_be64(wwpn, b);
5860         for (i = 0; i < WWN_SIZE; i++)
5861                 pr_debug("%02x ", b[i]);
5862         pr_debug("\n");
5863 }
5864
5865 /**
5866  * qla_tgt_lport_register - register lport with external module
5867  *
5868  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5869  * @wwpn: Passwd FC target WWPN
5870  * @callback:  lport initialization callback for tcm_qla2xxx code
5871  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5872  */
5873 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5874                        u64 npiv_wwpn, u64 npiv_wwnn,
5875                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5876 {
5877         struct qla_tgt *tgt;
5878         struct scsi_qla_host *vha;
5879         struct qla_hw_data *ha;
5880         struct Scsi_Host *host;
5881         unsigned long flags;
5882         int rc;
5883         u8 b[WWN_SIZE];
5884
5885         mutex_lock(&qla_tgt_mutex);
5886         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5887                 vha = tgt->vha;
5888                 ha = vha->hw;
5889
5890                 host = vha->host;
5891                 if (!host)
5892                         continue;
5893
5894                 if (!(host->hostt->supported_mode & MODE_TARGET))
5895                         continue;
5896
5897                 spin_lock_irqsave(&ha->hardware_lock, flags);
5898                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5899                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5900                             host->host_no);
5901                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5902                         continue;
5903                 }
5904                 if (tgt->tgt_stop) {
5905                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5906                                  host->host_no);
5907                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5908                         continue;
5909                 }
5910                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5911
5912                 if (!scsi_host_get(host)) {
5913                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
5914                             "Unable to scsi_host_get() for"
5915                             " qla2xxx scsi_host\n");
5916                         continue;
5917                 }
5918                 qlt_lport_dump(vha, phys_wwpn, b);
5919
5920                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5921                         scsi_host_put(host);
5922                         continue;
5923                 }
5924                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5925                 if (rc != 0)
5926                         scsi_host_put(host);
5927
5928                 mutex_unlock(&qla_tgt_mutex);
5929                 return rc;
5930         }
5931         mutex_unlock(&qla_tgt_mutex);
5932
5933         return -ENODEV;
5934 }
5935 EXPORT_SYMBOL(qlt_lport_register);
5936
5937 /**
5938  * qla_tgt_lport_deregister - Degister lport
5939  *
5940  * @vha:  Registered scsi_qla_host pointer
5941  */
5942 void qlt_lport_deregister(struct scsi_qla_host *vha)
5943 {
5944         struct qla_hw_data *ha = vha->hw;
5945         struct Scsi_Host *sh = vha->host;
5946         /*
5947          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5948          */
5949         vha->vha_tgt.target_lport_ptr = NULL;
5950         ha->tgt.tgt_ops = NULL;
5951         /*
5952          * Release the Scsi_Host reference for the underlying qla2xxx host
5953          */
5954         scsi_host_put(sh);
5955 }
5956 EXPORT_SYMBOL(qlt_lport_deregister);
5957
5958 /* Must be called under HW lock */
5959 static void qlt_set_mode(struct scsi_qla_host *vha)
5960 {
5961         struct qla_hw_data *ha = vha->hw;
5962
5963         switch (ql2x_ini_mode) {
5964         case QLA2XXX_INI_MODE_DISABLED:
5965         case QLA2XXX_INI_MODE_EXCLUSIVE:
5966                 vha->host->active_mode = MODE_TARGET;
5967                 break;
5968         case QLA2XXX_INI_MODE_ENABLED:
5969                 vha->host->active_mode |= MODE_TARGET;
5970                 break;
5971         default:
5972                 break;
5973         }
5974
5975         if (ha->tgt.ini_mode_force_reverse)
5976                 qla_reverse_ini_mode(vha);
5977 }
5978
5979 /* Must be called under HW lock */
5980 static void qlt_clear_mode(struct scsi_qla_host *vha)
5981 {
5982         struct qla_hw_data *ha = vha->hw;
5983
5984         switch (ql2x_ini_mode) {
5985         case QLA2XXX_INI_MODE_DISABLED:
5986                 vha->host->active_mode = MODE_UNKNOWN;
5987                 break;
5988         case QLA2XXX_INI_MODE_EXCLUSIVE:
5989                 vha->host->active_mode = MODE_INITIATOR;
5990                 break;
5991         case QLA2XXX_INI_MODE_ENABLED:
5992                 vha->host->active_mode &= ~MODE_TARGET;
5993                 break;
5994         default:
5995                 break;
5996         }
5997
5998         if (ha->tgt.ini_mode_force_reverse)
5999                 qla_reverse_ini_mode(vha);
6000 }
6001
6002 /*
6003  * qla_tgt_enable_vha - NO LOCK HELD
6004  *
6005  * host_reset, bring up w/ Target Mode Enabled
6006  */
6007 void
6008 qlt_enable_vha(struct scsi_qla_host *vha)
6009 {
6010         struct qla_hw_data *ha = vha->hw;
6011         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6012         unsigned long flags;
6013         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6014
6015         if (!tgt) {
6016                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6017                     "Unable to locate qla_tgt pointer from"
6018                     " struct qla_hw_data\n");
6019                 dump_stack();
6020                 return;
6021         }
6022
6023         spin_lock_irqsave(&ha->hardware_lock, flags);
6024         tgt->tgt_stopped = 0;
6025         qlt_set_mode(vha);
6026         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6027
6028         if (vha->vp_idx) {
6029                 qla24xx_disable_vp(vha);
6030                 qla24xx_enable_vp(vha);
6031         } else {
6032                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6033                 qla2xxx_wake_dpc(base_vha);
6034                 qla2x00_wait_for_hba_online(base_vha);
6035         }
6036 }
6037 EXPORT_SYMBOL(qlt_enable_vha);
6038
6039 /*
6040  * qla_tgt_disable_vha - NO LOCK HELD
6041  *
6042  * Disable Target Mode and reset the adapter
6043  */
6044 static void qlt_disable_vha(struct scsi_qla_host *vha)
6045 {
6046         struct qla_hw_data *ha = vha->hw;
6047         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6048         unsigned long flags;
6049
6050         if (!tgt) {
6051                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6052                     "Unable to locate qla_tgt pointer from"
6053                     " struct qla_hw_data\n");
6054                 dump_stack();
6055                 return;
6056         }
6057
6058         spin_lock_irqsave(&ha->hardware_lock, flags);
6059         qlt_clear_mode(vha);
6060         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6061
6062         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6063         qla2xxx_wake_dpc(vha);
6064         qla2x00_wait_for_hba_online(vha);
6065 }
6066
6067 /*
6068  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6069  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6070  * members.
6071  */
6072 void
6073 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6074 {
6075         if (!qla_tgt_mode_enabled(vha))
6076                 return;
6077
6078         vha->vha_tgt.qla_tgt = NULL;
6079
6080         mutex_init(&vha->vha_tgt.tgt_mutex);
6081         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6082
6083         qlt_clear_mode(vha);
6084
6085         /*
6086          * NOTE: Currently the value is kept the same for <24xx and
6087          * >=24xx ISPs. If it is necessary to change it,
6088          * the check should be added for specific ISPs,
6089          * assigning the value appropriately.
6090          */
6091         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6092
6093         qlt_add_target(ha, vha);
6094 }
6095
6096 void
6097 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6098 {
6099         /*
6100          * FC-4 Feature bit 0 indicates target functionality to the name server.
6101          */
6102         if (qla_tgt_mode_enabled(vha)) {
6103                 if (qla_ini_mode_enabled(vha))
6104                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6105                 else
6106                         ct_req->req.rff_id.fc4_feature = BIT_0;
6107         } else if (qla_ini_mode_enabled(vha)) {
6108                 ct_req->req.rff_id.fc4_feature = BIT_1;
6109         }
6110 }
6111
6112 /*
6113  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6114  * @ha: HA context
6115  *
6116  * Beginning of ATIO ring has initialization control block already built
6117  * by nvram config routine.
6118  *
6119  * Returns 0 on success.
6120  */
6121 void
6122 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6123 {
6124         struct qla_hw_data *ha = vha->hw;
6125         uint16_t cnt;
6126         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6127
6128         if (!qla_tgt_mode_enabled(vha))
6129                 return;
6130
6131         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6132                 pkt->u.raw.signature = ATIO_PROCESSED;
6133                 pkt++;
6134         }
6135
6136 }
6137
6138 /*
6139  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6140  * @ha: SCSI driver HA context
6141  */
6142 void
6143 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
6144 {
6145         struct qla_hw_data *ha = vha->hw;
6146         struct atio_from_isp *pkt;
6147         int cnt, i;
6148
6149         if (!vha->flags.online)
6150                 return;
6151
6152         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
6153                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6154                 cnt = pkt->u.raw.entry_count;
6155
6156                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
6157
6158                 for (i = 0; i < cnt; i++) {
6159                         ha->tgt.atio_ring_index++;
6160                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6161                                 ha->tgt.atio_ring_index = 0;
6162                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6163                         } else
6164                                 ha->tgt.atio_ring_ptr++;
6165
6166                         pkt->u.raw.signature = ATIO_PROCESSED;
6167                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6168                 }
6169                 wmb();
6170         }
6171
6172         /* Adjust ring index */
6173         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6174         RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6175 }
6176
6177 void
6178 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6179 {
6180         struct qla_hw_data *ha = vha->hw;
6181         if (!QLA_TGT_MODE_ENABLED())
6182                 return;
6183
6184         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6185         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6186         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6187
6188         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6189                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6190                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6191
6192                 icb->msix_atio = cpu_to_le16(msix->entry);
6193                 ql_dbg(ql_dbg_init, vha, 0xf072,
6194                     "Registering ICB vector 0x%x for atio que.\n",
6195                     msix->entry);
6196         }
6197 }
6198
6199 void
6200 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6201 {
6202         struct qla_hw_data *ha = vha->hw;
6203
6204         if (qla_tgt_mode_enabled(vha)) {
6205                 if (!ha->tgt.saved_set) {
6206                         /* We save only once */
6207                         ha->tgt.saved_exchange_count = nv->exchange_count;
6208                         ha->tgt.saved_firmware_options_1 =
6209                             nv->firmware_options_1;
6210                         ha->tgt.saved_firmware_options_2 =
6211                             nv->firmware_options_2;
6212                         ha->tgt.saved_firmware_options_3 =
6213                             nv->firmware_options_3;
6214                         ha->tgt.saved_set = 1;
6215                 }
6216
6217                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
6218
6219                 /* Enable target mode */
6220                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
6221
6222                 /* Disable ini mode, if requested */
6223                 if (!qla_ini_mode_enabled(vha))
6224                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
6225
6226                 /* Disable Full Login after LIP */
6227                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
6228                 /* Enable initial LIP */
6229                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
6230                 if (ql2xtgt_tape_enable)
6231                         /* Enable FC Tape support */
6232                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6233                 else
6234                         /* Disable FC Tape support */
6235                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6236
6237                 /* Disable Full Login after LIP */
6238                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
6239                 /* Enable target PRLI control */
6240                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
6241         } else {
6242                 if (ha->tgt.saved_set) {
6243                         nv->exchange_count = ha->tgt.saved_exchange_count;
6244                         nv->firmware_options_1 =
6245                             ha->tgt.saved_firmware_options_1;
6246                         nv->firmware_options_2 =
6247                             ha->tgt.saved_firmware_options_2;
6248                         nv->firmware_options_3 =
6249                             ha->tgt.saved_firmware_options_3;
6250                 }
6251                 return;
6252         }
6253
6254         /* out-of-order frames reassembly */
6255         nv->firmware_options_3 |= BIT_6|BIT_9;
6256
6257         if (ha->tgt.enable_class_2) {
6258                 if (vha->flags.init_done)
6259                         fc_host_supported_classes(vha->host) =
6260                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6261
6262                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
6263         } else {
6264                 if (vha->flags.init_done)
6265                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6266
6267                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
6268         }
6269 }
6270
6271 void
6272 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6273         struct init_cb_24xx *icb)
6274 {
6275         struct qla_hw_data *ha = vha->hw;
6276
6277         if (ha->tgt.node_name_set) {
6278                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6279                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
6280         }
6281 }
6282
6283 void
6284 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6285 {
6286         struct qla_hw_data *ha = vha->hw;
6287
6288         if (!QLA_TGT_MODE_ENABLED())
6289                 return;
6290
6291         if (qla_tgt_mode_enabled(vha)) {
6292                 if (!ha->tgt.saved_set) {
6293                         /* We save only once */
6294                         ha->tgt.saved_exchange_count = nv->exchange_count;
6295                         ha->tgt.saved_firmware_options_1 =
6296                             nv->firmware_options_1;
6297                         ha->tgt.saved_firmware_options_2 =
6298                             nv->firmware_options_2;
6299                         ha->tgt.saved_firmware_options_3 =
6300                             nv->firmware_options_3;
6301                         ha->tgt.saved_set = 1;
6302                 }
6303
6304                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
6305
6306                 /* Enable target mode */
6307                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
6308
6309                 /* Disable ini mode, if requested */
6310                 if (!qla_ini_mode_enabled(vha))
6311                         nv->firmware_options_1 |=
6312                             __constant_cpu_to_le32(BIT_5);
6313
6314                 /* Disable Full Login after LIP */
6315                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
6316                 /* Enable initial LIP */
6317                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
6318                 if (ql2xtgt_tape_enable)
6319                         /* Enable FC tape support */
6320                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6321                 else
6322                         /* Disable FC tape support */
6323                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6324
6325                 /* Disable Full Login after LIP */
6326                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
6327                 /* Enable target PRLI control */
6328                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
6329         } else {
6330                 if (ha->tgt.saved_set) {
6331                         nv->exchange_count = ha->tgt.saved_exchange_count;
6332                         nv->firmware_options_1 =
6333                             ha->tgt.saved_firmware_options_1;
6334                         nv->firmware_options_2 =
6335                             ha->tgt.saved_firmware_options_2;
6336                         nv->firmware_options_3 =
6337                             ha->tgt.saved_firmware_options_3;
6338                 }
6339                 return;
6340         }
6341
6342         /* out-of-order frames reassembly */
6343         nv->firmware_options_3 |= BIT_6|BIT_9;
6344
6345         if (ha->tgt.enable_class_2) {
6346                 if (vha->flags.init_done)
6347                         fc_host_supported_classes(vha->host) =
6348                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6349
6350                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
6351         } else {
6352                 if (vha->flags.init_done)
6353                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6354
6355                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
6356         }
6357 }
6358
6359 void
6360 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6361         struct init_cb_81xx *icb)
6362 {
6363         struct qla_hw_data *ha = vha->hw;
6364
6365         if (!QLA_TGT_MODE_ENABLED())
6366                 return;
6367
6368         if (ha->tgt.node_name_set) {
6369                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6370                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
6371         }
6372 }
6373
6374 void
6375 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6376 {
6377         if (!QLA_TGT_MODE_ENABLED())
6378                 return;
6379
6380         ha->msix_count += 1; /* For ATIO Q */
6381 }
6382
6383 int
6384 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6385         struct sts_entry_24xx *pkt)
6386 {
6387         switch (pkt->entry_type) {
6388         case ABTS_RECV_24XX:
6389         case ABTS_RESP_24XX:
6390         case CTIO_TYPE7:
6391         case NOTIFY_ACK_TYPE:
6392         case CTIO_CRC2:
6393                 return 1;
6394         default:
6395                 return 0;
6396         }
6397 }
6398
6399 void
6400 qlt_modify_vp_config(struct scsi_qla_host *vha,
6401         struct vp_config_entry_24xx *vpmod)
6402 {
6403         if (qla_tgt_mode_enabled(vha))
6404                 vpmod->options_idx1 &= ~BIT_5;
6405         /* Disable ini mode, if requested */
6406         if (!qla_ini_mode_enabled(vha))
6407                 vpmod->options_idx1 &= ~BIT_4;
6408 }
6409
6410 void
6411 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6412 {
6413         if (!QLA_TGT_MODE_ENABLED())
6414                 return;
6415
6416         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6417                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6418                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6419         } else {
6420                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6421                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6422         }
6423
6424         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6425         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6426         qlt_clear_mode(base_vha);
6427 }
6428
6429 irqreturn_t
6430 qla83xx_msix_atio_q(int irq, void *dev_id)
6431 {
6432         struct rsp_que *rsp;
6433         scsi_qla_host_t *vha;
6434         struct qla_hw_data *ha;
6435         unsigned long flags;
6436
6437         rsp = (struct rsp_que *) dev_id;
6438         ha = rsp->hw;
6439         vha = pci_get_drvdata(ha->pdev);
6440
6441         spin_lock_irqsave(&ha->hardware_lock, flags);
6442
6443         qlt_24xx_process_atio_queue(vha);
6444         qla24xx_process_response_queue(vha, rsp);
6445
6446         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6447
6448         return IRQ_HANDLED;
6449 }
6450
6451 int
6452 qlt_mem_alloc(struct qla_hw_data *ha)
6453 {
6454         if (!QLA_TGT_MODE_ENABLED())
6455                 return 0;
6456
6457         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6458             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6459         if (!ha->tgt.tgt_vp_map)
6460                 return -ENOMEM;
6461
6462         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6463             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6464             &ha->tgt.atio_dma, GFP_KERNEL);
6465         if (!ha->tgt.atio_ring) {
6466                 kfree(ha->tgt.tgt_vp_map);
6467                 return -ENOMEM;
6468         }
6469         return 0;
6470 }
6471
6472 void
6473 qlt_mem_free(struct qla_hw_data *ha)
6474 {
6475         if (!QLA_TGT_MODE_ENABLED())
6476                 return;
6477
6478         if (ha->tgt.atio_ring) {
6479                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6480                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6481                     ha->tgt.atio_dma);
6482         }
6483         kfree(ha->tgt.tgt_vp_map);
6484 }
6485
6486 /* vport_slock to be held by the caller */
6487 void
6488 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6489 {
6490         if (!QLA_TGT_MODE_ENABLED())
6491                 return;
6492
6493         switch (cmd) {
6494         case SET_VP_IDX:
6495                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6496                 break;
6497         case SET_AL_PA:
6498                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6499                 break;
6500         case RESET_VP_IDX:
6501                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6502                 break;
6503         case RESET_AL_PA:
6504                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6505                 break;
6506         }
6507 }
6508
6509 static int __init qlt_parse_ini_mode(void)
6510 {
6511         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6512                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6513         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6514                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6515         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6516                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6517         else
6518                 return false;
6519
6520         return true;
6521 }
6522
6523 int __init qlt_init(void)
6524 {
6525         int ret;
6526
6527         if (!qlt_parse_ini_mode()) {
6528                 ql_log(ql_log_fatal, NULL, 0xe06b,
6529                     "qlt_parse_ini_mode() failed\n");
6530                 return -EINVAL;
6531         }
6532
6533         if (!QLA_TGT_MODE_ENABLED())
6534                 return 0;
6535
6536         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6537             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6538             qla_tgt_mgmt_cmd), 0, NULL);
6539         if (!qla_tgt_mgmt_cmd_cachep) {
6540                 ql_log(ql_log_fatal, NULL, 0xe06d,
6541                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6542                 return -ENOMEM;
6543         }
6544
6545         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6546             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6547         if (!qla_tgt_mgmt_cmd_mempool) {
6548                 ql_log(ql_log_fatal, NULL, 0xe06e,
6549                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6550                 ret = -ENOMEM;
6551                 goto out_mgmt_cmd_cachep;
6552         }
6553
6554         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6555         if (!qla_tgt_wq) {
6556                 ql_log(ql_log_fatal, NULL, 0xe06f,
6557                     "alloc_workqueue for qla_tgt_wq failed\n");
6558                 ret = -ENOMEM;
6559                 goto out_cmd_mempool;
6560         }
6561         /*
6562          * Return 1 to signal that initiator-mode is being disabled
6563          */
6564         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6565
6566 out_cmd_mempool:
6567         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6568 out_mgmt_cmd_cachep:
6569         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6570         return ret;
6571 }
6572
6573 void qlt_exit(void)
6574 {
6575         if (!QLA_TGT_MODE_ENABLED())
6576                 return;
6577
6578         destroy_workqueue(qla_tgt_wq);
6579         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6580         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6581 }