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                 u16 cnt = 0;
 441
 442                 while (!ACCESS_ONCE(sess->logout_completed)) {
 443                         if (!traced) {
 444                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
 445                                         "%s: waiting for sess %p logout\n",
 446                                         __func__, sess);
 447                                 traced = true;
 448                         }
 449                         msleep(100);
 450                         cnt++;
 451                         if (cnt > 200)
 452                                 break;
 453                 }
 454
 455                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
 456                         "%s: sess %p logout completed\n",
 457                         __func__, sess);
 458         }
 459
 460         spin_lock_irqsave(&ha->hardware_lock, flags);
 461
 462         if (sess->plogi_ack_needed)
 463                 qlt_send_notify_ack(vha, &sess->tm_iocb,
 464                                     0, 0, 0, 0, 0, 0);
 465
 466         list_del(&sess->sess_list_entry);
 467
 468         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 469
 470         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 471             "Unregistration of sess %p finished\n", sess);
 472
 473         kfree(sess);
 474         /*
 475          * We need to protect against race, when tgt is freed before or
 476          * inside wake_up()
 477          */
 478         tgt->sess_count--;
 479         if (tgt->sess_count == 0)
 480                 wake_up_all(&tgt->waitQ);
 481 }
 482
 483 /* ha->hardware_lock supposed to be held on entry */
 484 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 485 {
 486         struct scsi_qla_host *vha = sess->vha;
 487
 488         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 489
 490         if (!list_empty(&sess->del_list_entry))
 491                 list_del_init(&sess->del_list_entry);
 492         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 493
 494         INIT_WORK(&sess->free_work, qlt_free_session_done);
 495         schedule_work(&sess->free_work);
 496 }
 497 EXPORT_SYMBOL(qlt_unreg_sess);
 498
 499 /* ha->hardware_lock supposed to be held on entry */
 500 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 501 {
 502         struct qla_hw_data *ha = vha->hw;
 503         struct qla_tgt_sess *sess = NULL;
 504         uint32_t unpacked_lun, lun = 0;
 505         uint16_t loop_id;
 506         int res = 0;
 507         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 508         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 509
 510         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 511         if (loop_id == 0xFFFF) {
 512                 /* Global event */
 513                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
 514                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
 515 #if 0 /* FIXME: do we need to choose a session here? */
 516                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 517                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 518                             typeof(*sess), sess_list_entry);
 519                         switch (mcmd) {
 520                         case QLA_TGT_NEXUS_LOSS_SESS:
 521                                 mcmd = QLA_TGT_NEXUS_LOSS;
 522                                 break;
 523                         case QLA_TGT_ABORT_ALL_SESS:
 524                                 mcmd = QLA_TGT_ABORT_ALL;
 525                                 break;
 526                         case QLA_TGT_NEXUS_LOSS:
 527                         case QLA_TGT_ABORT_ALL:
 528                                 break;
 529                         default:
 530                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 531                                     "qla_target(%d): Not allowed "
 532                                     "command %x in %s", vha->vp_idx,
 533                                     mcmd, __func__);
 534                                 sess = NULL;
 535                                 break;
 536                         }
 537                 } else
 538                         sess = NULL;
 539 #endif
 540         } else {
 541                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 542         }
 543
 544         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 545             "Using sess for qla_tgt_reset: %p\n", sess);
 546         if (!sess) {
 547                 res = -ESRCH;
 548                 return res;
 549         }
 550
 551         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 552             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 553             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 554             mcmd, loop_id);
 555
 556         lun = a->u.isp24.fcp_cmnd.lun;
 557         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 558
 559         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 560             iocb, QLA24XX_MGMT_SEND_NACK);
 561 }
 562
 563 /* ha->hardware_lock supposed to be held on entry */
 564 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 565         bool immediate)
 566 {
 567         struct qla_tgt *tgt = sess->tgt;
 568         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 569
 570         if (sess->deleted) {
 571                 /* Upgrade to unconditional deletion in case it was temporary */
 572                 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
 573                         list_del(&sess->del_list_entry);
 574                 else
 575                         return;
 576         }
 577
 578         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 579             "Scheduling sess %p for deletion\n", sess);
 580
 581         if (immediate) {
 582                 dev_loss_tmo = 0;
 583                 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 584                 list_add(&sess->del_list_entry, &tgt->del_sess_list);
 585         } else {
 586                 sess->deleted = QLA_SESS_DELETION_PENDING;
 587                 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 588         }
 589
 590         sess->expires = jiffies + dev_loss_tmo * HZ;
 591
 592         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 593             "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
 594             " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
 595             sess->vha->vp_idx, sess->port_name, sess->loop_id,
 596             sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 597             dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
 598             sess->generation);
 599
 600         if (immediate)
 601                 mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
 602         else
 603                 schedule_delayed_work(&tgt->sess_del_work,
 604                     sess->expires - jiffies);
 605 }
 606
 607 /* ha->hardware_lock supposed to be held on entry */
 608 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
 609 {
 610         struct qla_tgt_sess *sess;
 611
 612         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 613                 qlt_schedule_sess_for_deletion(sess, true);
 614
 615         /* At this point tgt could be already dead */
 616 }
 617
 618 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 619         uint16_t *loop_id)
 620 {
 621         struct qla_hw_data *ha = vha->hw;
 622         dma_addr_t gid_list_dma;
 623         struct gid_list_info *gid_list;
 624         char *id_iter;
 625         int res, rc, i;
 626         uint16_t entries;
 627
 628         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 629             &gid_list_dma, GFP_KERNEL);
 630         if (!gid_list) {
 631                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 632                     "qla_target(%d): DMA Alloc failed of %u\n",
 633                     vha->vp_idx, qla2x00_gid_list_size(ha));
 634                 return -ENOMEM;
 635         }
 636
 637         /* Get list of logged in devices */
 638         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 639         if (rc != QLA_SUCCESS) {
 640                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 641                     "qla_target(%d): get_id_list() failed: %x\n",
 642                     vha->vp_idx, rc);
 643                 res = -1;
 644                 goto out_free_id_list;
 645         }
 646
 647         id_iter = (char *)gid_list;
 648         res = -1;
 649         for (i = 0; i < entries; i++) {
 650                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 651                 if ((gid->al_pa == s_id[2]) &&
 652                     (gid->area == s_id[1]) &&
 653                     (gid->domain == s_id[0])) {
 654                         *loop_id = le16_to_cpu(gid->loop_id);
 655                         res = 0;
 656                         break;
 657                 }
 658                 id_iter += ha->gid_list_info_size;
 659         }
 660
 661 out_free_id_list:
 662         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 663             gid_list, gid_list_dma);
 664         return res;
 665 }
 666
 667 /* ha->hardware_lock supposed to be held on entry */
 668 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 669 {
 670         BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
 671
 672         list_del_init(&sess->del_list_entry);
 673         sess->deleted = 0;
 674 }
 675
 676 static void qlt_del_sess_work_fn(struct delayed_work *work)
 677 {
 678         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 679             sess_del_work);
 680         struct scsi_qla_host *vha = tgt->vha;
 681         struct qla_hw_data *ha = vha->hw;
 682         struct qla_tgt_sess *sess;
 683         unsigned long flags, elapsed;
 684
 685         spin_lock_irqsave(&ha->hardware_lock, flags);
 686         while (!list_empty(&tgt->del_sess_list)) {
 687                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 688                     del_list_entry);
 689                 elapsed = jiffies;
 690                 if (time_after_eq(elapsed, sess->expires)) {
 691                         /* No turning back */
 692                         list_del_init(&sess->del_list_entry);
 693                         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 694
 695                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 696                             "Timeout: sess %p about to be deleted\n",
 697                             sess);
 698                         ha->tgt.tgt_ops->shutdown_sess(sess);
 699                         ha->tgt.tgt_ops->put_sess(sess);
 700                 } else {
 701                         schedule_delayed_work(&tgt->sess_del_work,
 702                             sess->expires - elapsed);
 703                         break;
 704                 }
 705         }
 706         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 707 }
 708
 709 /*
 710  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 711  * Caller must put it.
 712  */
 713 static struct qla_tgt_sess *qlt_create_sess(
 714         struct scsi_qla_host *vha,
 715         fc_port_t *fcport,
 716         bool local)
 717 {
 718         struct qla_hw_data *ha = vha->hw;
 719         struct qla_tgt_sess *sess;
 720         unsigned long flags;
 721         unsigned char be_sid[3];
 722
 723         /* Check to avoid double sessions */
 724         spin_lock_irqsave(&ha->hardware_lock, flags);
 725         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 726                                 sess_list_entry) {
 727                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 728                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 729                             "Double sess %p found (s_id %x:%x:%x, "
 730                             "loop_id %d), updating to d_id %x:%x:%x, "
 731                             "loop_id %d", sess, sess->s_id.b.domain,
 732                             sess->s_id.b.al_pa, sess->s_id.b.area,
 733                             sess->loop_id, fcport->d_id.b.domain,
 734                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 735                             fcport->loop_id);
 736
 737                         /* Cannot undelete at this point */
 738                         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
 739                                 spin_unlock_irqrestore(&ha->hardware_lock,
 740                                     flags);
 741                                 return NULL;
 742                         }
 743
 744                         if (sess->deleted)
 745                                 qlt_undelete_sess(sess);
 746
 747                         kref_get(&sess->se_sess->sess_kref);
 748                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 749                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 750
 751                         if (sess->local && !local)
 752                                 sess->local = 0;
 753
 754                         qlt_do_generation_tick(vha, &sess->generation);
 755
 756                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 757
 758                         return sess;
 759                 }
 760         }
 761         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 762
 763         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 764         if (!sess) {
 765                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 766                     "qla_target(%u): session allocation failed, all commands "
 767                     "from port %8phC will be refused", vha->vp_idx,
 768                     fcport->port_name);
 769
 770                 return NULL;
 771         }
 772         sess->tgt = vha->vha_tgt.qla_tgt;
 773         sess->vha = vha;
 774         sess->s_id = fcport->d_id;
 775         sess->loop_id = fcport->loop_id;
 776         sess->local = local;
 777         INIT_LIST_HEAD(&sess->del_list_entry);
 778
 779         /* Under normal circumstances we want to logout from firmware when
 780          * session eventually ends and release corresponding nport handle.
 781          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
 782          * code will adjust these flags as necessary. */
 783         sess->logout_on_delete = 1;
 784         sess->keep_nport_handle = 0;
 785
 786         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 787             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 788             sess, vha->vha_tgt.qla_tgt);
 789
 790         be_sid[0] = sess->s_id.b.domain;
 791         be_sid[1] = sess->s_id.b.area;
 792         be_sid[2] = sess->s_id.b.al_pa;
 793         /*
 794          * Determine if this fc_port->port_name is allowed to access
 795          * target mode using explict NodeACLs+MappedLUNs, or using
 796          * TPG demo mode.  If this is successful a target mode FC nexus
 797          * is created.
 798          */
 799         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 800             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 801                 kfree(sess);
 802                 return NULL;
 803         }
 804         /*
 805          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 806          * access across ->hardware_lock reaquire.
 807          */
 808         kref_get(&sess->se_sess->sess_kref);
 809
 810         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 811         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 812         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 813
 814         spin_lock_irqsave(&ha->hardware_lock, flags);
 815         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 816         vha->vha_tgt.qla_tgt->sess_count++;
 817         qlt_do_generation_tick(vha, &sess->generation);
 818         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 819
 820         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 821             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 822             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 823             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 824             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 825             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 826
 827         return sess;
 828 }
 829
 830 /*
 831  * Called from qla2x00_reg_remote_port()
 832  */
 833 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 834 {
 835         struct qla_hw_data *ha = vha->hw;
 836         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 837         struct qla_tgt_sess *sess;
 838         unsigned long flags;
 839
 840         if (!vha->hw->tgt.tgt_ops)
 841                 return;
 842
 843         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 844                 return;
 845
 846         if (qla_ini_mode_enabled(vha))
 847                 return;
 848
 849         spin_lock_irqsave(&ha->hardware_lock, flags);
 850         if (tgt->tgt_stop) {
 851                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 852                 return;
 853         }
 854         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 855         if (!sess) {
 856                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 857
 858                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 859                 sess = qlt_create_sess(vha, fcport, false);
 860                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 861
 862                 spin_lock_irqsave(&ha->hardware_lock, flags);
 863         } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
 864                 /* Point of no return */
 865                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 866                 return;
 867         } else {
 868                 kref_get(&sess->se_sess->sess_kref);
 869
 870                 if (sess->deleted) {
 871                         qlt_undelete_sess(sess);
 872
 873                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 874                             "qla_target(%u): %ssession for port %8phC "
 875                             "(loop ID %d) reappeared\n", vha->vp_idx,
 876                             sess->local ? "local " : "", sess->port_name,
 877                             sess->loop_id);
 878
 879                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 880                             "Reappeared sess %p\n", sess);
 881                 }
 882                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 883                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 884         }
 885
 886         if (sess && sess->local) {
 887                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 888                     "qla_target(%u): local session for "
 889                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 890                     fcport->port_name, sess->loop_id);
 891                 sess->local = 0;
 892         }
 893         ha->tgt.tgt_ops->put_sess(sess);
 894         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 895 }
 896
 897 /*
 898  * max_gen - specifies maximum session generation
 899  * at which this deletion requestion is still valid
 900  */
 901 void
 902 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
 903 {
 904         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 905         struct qla_tgt_sess *sess;
 906
 907         if (!vha->hw->tgt.tgt_ops)
 908                 return;
 909
 910         if (!tgt)
 911                 return;
 912
 913         if (tgt->tgt_stop) {
 914                 return;
 915         }
 916         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 917         if (!sess) {
 918                 return;
 919         }
 920
 921         if (max_gen - sess->generation < 0) {
 922                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
 923                     "Ignoring stale deletion request for se_sess %p / sess %p"
 924                     " for port %8phC, req_gen %d, sess_gen %d\n",
 925                     sess->se_sess, sess, sess->port_name, max_gen,
 926                     sess->generation);
 927                 return;
 928         }
 929
 930         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 931
 932         sess->local = 1;
 933         qlt_schedule_sess_for_deletion(sess, false);
 934 }
 935
 936 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 937 {
 938         struct qla_hw_data *ha = tgt->ha;
 939         unsigned long flags;
 940         int res;
 941         /*
 942          * We need to protect against race, when tgt is freed before or
 943          * inside wake_up()
 944          */
 945         spin_lock_irqsave(&ha->hardware_lock, flags);
 946         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 947             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 948             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 949         res = (tgt->sess_count == 0);
 950         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 951
 952         return res;
 953 }
 954
 955 /* Called by tcm_qla2xxx configfs code */
 956 int qlt_stop_phase1(struct qla_tgt *tgt)
 957 {
 958         struct scsi_qla_host *vha = tgt->vha;
 959         struct qla_hw_data *ha = tgt->ha;
 960         unsigned long flags;
 961
 962         mutex_lock(&qla_tgt_mutex);
 963         if (!vha->fc_vport) {
 964                 struct Scsi_Host *sh = vha->host;
 965                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
 966                 bool npiv_vports;
 967
 968                 spin_lock_irqsave(sh->host_lock, flags);
 969                 npiv_vports = (fc_host->npiv_vports_inuse);
 970                 spin_unlock_irqrestore(sh->host_lock, flags);
 971
 972                 if (npiv_vports) {
 973                         mutex_unlock(&qla_tgt_mutex);
 974                         return -EPERM;
 975                 }
 976         }
 977         if (tgt->tgt_stop || tgt->tgt_stopped) {
 978                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 979                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 980                 mutex_unlock(&qla_tgt_mutex);
 981                 return -EPERM;
 982         }
 983
 984         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 985             vha->host_no, vha);
 986         /*
 987          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 988          * Lock is needed, because we still can get an incoming packet.
 989          */
 990         mutex_lock(&vha->vha_tgt.tgt_mutex);
 991         spin_lock_irqsave(&ha->hardware_lock, flags);
 992         tgt->tgt_stop = 1;
 993         qlt_clear_tgt_db(tgt);
 994         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 995         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 996         mutex_unlock(&qla_tgt_mutex);
 997
 998         flush_delayed_work(&tgt->sess_del_work);
 999
1000         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
1001             "Waiting for sess works (tgt %p)", tgt);
1002         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1003         while (!list_empty(&tgt->sess_works_list)) {
1004                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1005                 flush_scheduled_work();
1006                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1007         }
1008         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1009
1010         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1011             "Waiting for tgt %p: list_empty(sess_list)=%d "
1012             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
1013             tgt->sess_count);
1014
1015         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1016
1017         /* Big hammer */
1018         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
1019                 qlt_disable_vha(vha);
1020
1021         /* Wait for sessions to clear out (just in case) */
1022         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1023         return 0;
1024 }
1025 EXPORT_SYMBOL(qlt_stop_phase1);
1026
1027 /* Called by tcm_qla2xxx configfs code */
1028 void qlt_stop_phase2(struct qla_tgt *tgt)
1029 {
1030         struct qla_hw_data *ha = tgt->ha;
1031         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1032         unsigned long flags;
1033
1034         if (tgt->tgt_stopped) {
1035                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1036                     "Already in tgt->tgt_stopped state\n");
1037                 dump_stack();
1038                 return;
1039         }
1040
1041         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1042             "Waiting for %d IRQ commands to complete (tgt %p)",
1043             tgt->irq_cmd_count, tgt);
1044
1045         mutex_lock(&tgt->ha->optrom_mutex);
1046         mutex_lock(&vha->vha_tgt.tgt_mutex);
1047         spin_lock_irqsave(&ha->hardware_lock, flags);
1048         while (tgt->irq_cmd_count != 0) {
1049                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1050                 udelay(2);
1051                 spin_lock_irqsave(&ha->hardware_lock, flags);
1052         }
1053         tgt->tgt_stop = 0;
1054         tgt->tgt_stopped = 1;
1055         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1056         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1057         mutex_unlock(&tgt->ha->optrom_mutex);
1058
1059         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1060             tgt);
1061 }
1062 EXPORT_SYMBOL(qlt_stop_phase2);
1063
1064 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1065 static void qlt_release(struct qla_tgt *tgt)
1066 {
1067         scsi_qla_host_t *vha = tgt->vha;
1068
1069         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1070                 qlt_stop_phase2(tgt);
1071
1072         vha->vha_tgt.qla_tgt = NULL;
1073
1074         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1075             "Release of tgt %p finished\n", tgt);
1076
1077         kfree(tgt);
1078 }
1079
1080 /* ha->hardware_lock supposed to be held on entry */
1081 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1082         const void *param, unsigned int param_size)
1083 {
1084         struct qla_tgt_sess_work_param *prm;
1085         unsigned long flags;
1086
1087         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1088         if (!prm) {
1089                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1090                     "qla_target(%d): Unable to create session "
1091                     "work, command will be refused", 0);
1092                 return -ENOMEM;
1093         }
1094
1095         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1096             "Scheduling work (type %d, prm %p)"
1097             " to find session for param %p (size %d, tgt %p)\n",
1098             type, prm, param, param_size, tgt);
1099
1100         prm->type = type;
1101         memcpy(&prm->tm_iocb, param, param_size);
1102
1103         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1104         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1105         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1106
1107         schedule_work(&tgt->sess_work);
1108
1109         return 0;
1110 }
1111
1112 /*
1113  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1114  */
1115 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1116         struct imm_ntfy_from_isp *ntfy,
1117         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1118         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1119 {
1120         struct qla_hw_data *ha = vha->hw;
1121         request_t *pkt;
1122         struct nack_to_isp *nack;
1123
1124         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1125
1126         /* Send marker if required */
1127         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1128                 return;
1129
1130         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1131         if (!pkt) {
1132                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1133                     "qla_target(%d): %s failed: unable to allocate "
1134                     "request packet\n", vha->vp_idx, __func__);
1135                 return;
1136         }
1137
1138         if (vha->vha_tgt.qla_tgt != NULL)
1139                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1140
1141         pkt->entry_type = NOTIFY_ACK_TYPE;
1142         pkt->entry_count = 1;
1143
1144         nack = (struct nack_to_isp *)pkt;
1145         nack->ox_id = ntfy->ox_id;
1146
1147         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1148         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1149                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1150                         cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1151         }
1152         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1153         nack->u.isp24.status = ntfy->u.isp24.status;
1154         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1155         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1156         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1157         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1158         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1159         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1160         nack->u.isp24.srr_reject_code = srr_reject_code;
1161         nack->u.isp24.srr_reject_code_expl = srr_explan;
1162         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1163
1164         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1165             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1166             vha->vp_idx, nack->u.isp24.status);
1167
1168         /* Memory Barrier */
1169         wmb();
1170         qla2x00_start_iocbs(vha, vha->req);
1171 }
1172
1173 /*
1174  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1175  */
1176 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1177         struct abts_recv_from_24xx *abts, uint32_t status,
1178         bool ids_reversed)
1179 {
1180         struct qla_hw_data *ha = vha->hw;
1181         struct abts_resp_to_24xx *resp;
1182         uint32_t f_ctl;
1183         uint8_t *p;
1184
1185         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1186             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1187             ha, abts, status);
1188
1189         /* Send marker if required */
1190         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1191                 return;
1192
1193         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1194         if (!resp) {
1195                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1196                     "qla_target(%d): %s failed: unable to allocate "
1197                     "request packet", vha->vp_idx, __func__);
1198                 return;
1199         }
1200
1201         resp->entry_type = ABTS_RESP_24XX;
1202         resp->entry_count = 1;
1203         resp->nport_handle = abts->nport_handle;
1204         resp->vp_index = vha->vp_idx;
1205         resp->sof_type = abts->sof_type;
1206         resp->exchange_address = abts->exchange_address;
1207         resp->fcp_hdr_le = abts->fcp_hdr_le;
1208         f_ctl = cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1209             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1210             F_CTL_SEQ_INITIATIVE);
1211         p = (uint8_t *)&f_ctl;
1212         resp->fcp_hdr_le.f_ctl[0] = *p++;
1213         resp->fcp_hdr_le.f_ctl[1] = *p++;
1214         resp->fcp_hdr_le.f_ctl[2] = *p;
1215         if (ids_reversed) {
1216                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1217                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1218                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1219                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1220                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1221                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1222         } else {
1223                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1224                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1225                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1226                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1227                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1228                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1229         }
1230         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1231         if (status == FCP_TMF_CMPL) {
1232                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1233                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1234                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1235                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1236                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1237                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1238         } else {
1239                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1240                 resp->payload.ba_rjt.reason_code =
1241                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1242                 /* Other bytes are zero */
1243         }
1244
1245         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1246
1247         /* Memory Barrier */
1248         wmb();
1249         qla2x00_start_iocbs(vha, vha->req);
1250 }
1251
1252 /*
1253  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1254  */
1255 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1256         struct abts_resp_from_24xx_fw *entry)
1257 {
1258         struct ctio7_to_24xx *ctio;
1259
1260         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1261             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1262         /* Send marker if required */
1263         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1264                 return;
1265
1266         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1267         if (ctio == NULL) {
1268                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1269                     "qla_target(%d): %s failed: unable to allocate "
1270                     "request packet\n", vha->vp_idx, __func__);
1271                 return;
1272         }
1273
1274         /*
1275          * We've got on entrance firmware's response on by us generated
1276          * ABTS response. So, in it ID fields are reversed.
1277          */
1278
1279         ctio->entry_type = CTIO_TYPE7;
1280         ctio->entry_count = 1;
1281         ctio->nport_handle = entry->nport_handle;
1282         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1283         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1284         ctio->vp_index = vha->vp_idx;
1285         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1286         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1287         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1288         ctio->exchange_addr = entry->exchange_addr_to_abort;
1289         ctio->u.status1.flags = cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1290                                             CTIO7_FLAGS_TERMINATE);
1291         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1292
1293         /* Memory Barrier */
1294         wmb();
1295         qla2x00_start_iocbs(vha, vha->req);
1296
1297         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1298             FCP_TMF_CMPL, true);
1299 }
1300
1301 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1302 {
1303         struct qla_tgt_sess_op *op;
1304         struct qla_tgt_cmd *cmd;
1305
1306         spin_lock(&vha->cmd_list_lock);
1307
1308         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1309                 if (tag == op->atio.u.isp24.exchange_addr) {
1310                         op->aborted = true;
1311                         spin_unlock(&vha->cmd_list_lock);
1312                         return 1;
1313                 }
1314         }
1315
1316         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1317                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1318                         cmd->state = QLA_TGT_STATE_ABORTED;
1319                         spin_unlock(&vha->cmd_list_lock);
1320                         return 1;
1321                 }
1322         }
1323
1324         spin_unlock(&vha->cmd_list_lock);
1325         return 0;
1326 }
1327
1328 /* drop cmds for the given lun
1329  * XXX only looks for cmds on the port through which lun reset was recieved
1330  * XXX does not go through the list of other port (which may have cmds
1331  *     for the same lun)
1332  */
1333 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1334                                 uint32_t lun, uint8_t *s_id)
1335 {
1336         struct qla_tgt_sess_op *op;
1337         struct qla_tgt_cmd *cmd;
1338         uint32_t key;
1339
1340         key = sid_to_key(s_id);
1341         spin_lock(&vha->cmd_list_lock);
1342         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1343                 uint32_t op_key;
1344                 uint32_t op_lun;
1345
1346                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1347                 op_lun = scsilun_to_int(
1348                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1349                 if (op_key == key && op_lun == lun)
1350                         op->aborted = true;
1351         }
1352         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1353                 uint32_t cmd_key;
1354                 uint32_t cmd_lun;
1355
1356                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1357                 cmd_lun = scsilun_to_int(
1358                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1359                 if (cmd_key == key && cmd_lun == lun)
1360                         cmd->state = QLA_TGT_STATE_ABORTED;
1361         }
1362         spin_unlock(&vha->cmd_list_lock);
1363 }
1364
1365 /* ha->hardware_lock supposed to be held on entry */
1366 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1367         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1368 {
1369         struct qla_hw_data *ha = vha->hw;
1370         struct se_session *se_sess = sess->se_sess;
1371         struct qla_tgt_mgmt_cmd *mcmd;
1372         struct se_cmd *se_cmd;
1373         u32 lun = 0;
1374         int rc;
1375         bool found_lun = false;
1376
1377         spin_lock(&se_sess->sess_cmd_lock);
1378         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1379                 struct qla_tgt_cmd *cmd =
1380                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1381                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1382                         lun = cmd->unpacked_lun;
1383                         found_lun = true;
1384                         break;
1385                 }
1386         }
1387         spin_unlock(&se_sess->sess_cmd_lock);
1388
1389         /* cmd not in LIO lists, look in qla list */
1390         if (!found_lun) {
1391                 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1392                         /* send TASK_ABORT response immediately */
1393                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1394                         return 0;
1395                 } else {
1396                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1397                             "unable to find cmd in driver or LIO for tag 0x%x\n",
1398                             abts->exchange_addr_to_abort);
1399                         return -ENOENT;
1400                 }
1401         }
1402
1403         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1404             "qla_target(%d): task abort (tag=%d)\n",
1405             vha->vp_idx, abts->exchange_addr_to_abort);
1406
1407         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1408         if (mcmd == NULL) {
1409                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1410                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1411                     vha->vp_idx, __func__);
1412                 return -ENOMEM;
1413         }
1414         memset(mcmd, 0, sizeof(*mcmd));
1415
1416         mcmd->sess = sess;
1417         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1418         mcmd->reset_count = vha->hw->chip_reset;
1419
1420         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1421             abts->exchange_addr_to_abort);
1422         if (rc != 0) {
1423                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1424                     "qla_target(%d):  tgt_ops->handle_tmr()"
1425                     " failed: %d", vha->vp_idx, rc);
1426                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1427                 return -EFAULT;
1428         }
1429
1430         return 0;
1431 }
1432
1433 /*
1434  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1435  */
1436 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1437         struct abts_recv_from_24xx *abts)
1438 {
1439         struct qla_hw_data *ha = vha->hw;
1440         struct qla_tgt_sess *sess;
1441         uint32_t tag = abts->exchange_addr_to_abort;
1442         uint8_t s_id[3];
1443         int rc;
1444
1445         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1446                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1447                     "qla_target(%d): ABTS: Abort Sequence not "
1448                     "supported\n", vha->vp_idx);
1449                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1450                 return;
1451         }
1452
1453         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1454                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1455                     "qla_target(%d): ABTS: Unknown Exchange "
1456                     "Address received\n", vha->vp_idx);
1457                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1458                 return;
1459         }
1460
1461         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1462             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1463             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1464             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1465             le32_to_cpu(abts->fcp_hdr_le.parameter));
1466
1467         s_id[0] = abts->fcp_hdr_le.s_id[2];
1468         s_id[1] = abts->fcp_hdr_le.s_id[1];
1469         s_id[2] = abts->fcp_hdr_le.s_id[0];
1470
1471         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1472         if (!sess) {
1473                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1474                     "qla_target(%d): task abort for non-existant session\n",
1475                     vha->vp_idx);
1476                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1477                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1478                 if (rc != 0) {
1479                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1480                             false);
1481                 }
1482                 return;
1483         }
1484
1485         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1486                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1487                 return;
1488         }
1489
1490         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1491         if (rc != 0) {
1492                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1493                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1494                     vha->vp_idx, rc);
1495                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1496                 return;
1497         }
1498 }
1499
1500 /*
1501  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1502  */
1503 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1504         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1505 {
1506         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1507         struct ctio7_to_24xx *ctio;
1508         uint16_t temp;
1509
1510         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1511             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1512             ha, atio, resp_code);
1513
1514         /* Send marker if required */
1515         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1516                 return;
1517
1518         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1519         if (ctio == NULL) {
1520                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1521                     "qla_target(%d): %s failed: unable to allocate "
1522                     "request packet\n", ha->vp_idx, __func__);
1523                 return;
1524         }
1525
1526         ctio->entry_type = CTIO_TYPE7;
1527         ctio->entry_count = 1;
1528         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1529         ctio->nport_handle = mcmd->sess->loop_id;
1530         ctio->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1531         ctio->vp_index = ha->vp_idx;
1532         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1533         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1534         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1535         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1536         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1537             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS);
1538         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1539         ctio->u.status1.ox_id = cpu_to_le16(temp);
1540         ctio->u.status1.scsi_status =
1541             cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1542         ctio->u.status1.response_len = cpu_to_le16(8);
1543         ctio->u.status1.sense_data[0] = resp_code;
1544
1545         /* Memory Barrier */
1546         wmb();
1547         qla2x00_start_iocbs(ha, ha->req);
1548 }
1549
1550 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1551 {
1552         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1553 }
1554 EXPORT_SYMBOL(qlt_free_mcmd);
1555
1556 /* callback from target fabric module code */
1557 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1558 {
1559         struct scsi_qla_host *vha = mcmd->sess->vha;
1560         struct qla_hw_data *ha = vha->hw;
1561         unsigned long flags;
1562
1563         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1564             "TM response mcmd (%p) status %#x state %#x",
1565             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1566
1567         spin_lock_irqsave(&ha->hardware_lock, flags);
1568
1569         if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1570                 /*
1571                  * Either a chip reset is active or this request was from
1572                  * previous life, just abort the processing.
1573                  */
1574                 ql_dbg(ql_dbg_async, vha, 0xe100,
1575                         "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1576                         qla2x00_reset_active(vha), mcmd->reset_count,
1577                         ha->chip_reset);
1578                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1579                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1580                 return;
1581         }
1582
1583         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1584                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1585                     0, 0, 0, 0, 0, 0);
1586         else {
1587                 if (mcmd->orig_iocb.atio.u.raw.entry_type == ABTS_RECV_24XX)
1588                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1589                             mcmd->fc_tm_rsp, false);
1590                 else
1591                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1592                             mcmd->fc_tm_rsp);
1593         }
1594         /*
1595          * Make the callback for ->free_mcmd() to queue_work() and invoke
1596          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1597          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1598          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1599          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1600          * qlt_xmit_tm_rsp() returns here..
1601          */
1602         ha->tgt.tgt_ops->free_mcmd(mcmd);
1603         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1604 }
1605 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1606
1607 /* No locks */
1608 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1609 {
1610         struct qla_tgt_cmd *cmd = prm->cmd;
1611
1612         BUG_ON(cmd->sg_cnt == 0);
1613
1614         prm->sg = (struct scatterlist *)cmd->sg;
1615         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1616             cmd->sg_cnt, cmd->dma_data_direction);
1617         if (unlikely(prm->seg_cnt == 0))
1618                 goto out_err;
1619
1620         prm->cmd->sg_mapped = 1;
1621
1622         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1623                 /*
1624                  * If greater than four sg entries then we need to allocate
1625                  * the continuation entries
1626                  */
1627                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1628                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1629                         prm->tgt->datasegs_per_cmd,
1630                         prm->tgt->datasegs_per_cont);
1631         } else {
1632                 /* DIF */
1633                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1634                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1635                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1636                         prm->tot_dsds = prm->seg_cnt;
1637                 } else
1638                         prm->tot_dsds = prm->seg_cnt;
1639
1640                 if (cmd->prot_sg_cnt) {
1641                         prm->prot_sg      = cmd->prot_sg;
1642                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1643                                 cmd->prot_sg, cmd->prot_sg_cnt,
1644                                 cmd->dma_data_direction);
1645                         if (unlikely(prm->prot_seg_cnt == 0))
1646                                 goto out_err;
1647
1648                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1649                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1650                                 /* Dif Bundling not support here */
1651                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1652                                                                 cmd->blk_sz);
1653                                 prm->tot_dsds += prm->prot_seg_cnt;
1654                         } else
1655                                 prm->tot_dsds += prm->prot_seg_cnt;
1656                 }
1657         }
1658
1659         return 0;
1660
1661 out_err:
1662         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1663             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1664             0, prm->cmd->sg_cnt);
1665         return -1;
1666 }
1667
1668 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1669 {
1670         struct qla_hw_data *ha = vha->hw;
1671
1672         if (!cmd->sg_mapped)
1673                 return;
1674
1675         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1676         cmd->sg_mapped = 0;
1677
1678         if (cmd->prot_sg_cnt)
1679                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1680                         cmd->dma_data_direction);
1681
1682         if (cmd->ctx_dsd_alloced)
1683                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1684
1685         if (cmd->ctx)
1686                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1687 }
1688
1689 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1690         uint32_t req_cnt)
1691 {
1692         uint32_t cnt, cnt_in;
1693
1694         if (vha->req->cnt < (req_cnt + 2)) {
1695                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1696                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1697
1698                 if  (vha->req->ring_index < cnt)
1699                         vha->req->cnt = cnt - vha->req->ring_index;
1700                 else
1701                         vha->req->cnt = vha->req->length -
1702                             (vha->req->ring_index - cnt);
1703         }
1704
1705         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1706                 ql_dbg(ql_dbg_io, vha, 0x305a,
1707                     "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",
1708                     vha->vp_idx, vha->req->ring_index,
1709                     vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1710                 return -EAGAIN;
1711         }
1712         vha->req->cnt -= req_cnt;
1713
1714         return 0;
1715 }
1716
1717 /*
1718  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1719  */
1720 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1721 {
1722         /* Adjust ring index. */
1723         vha->req->ring_index++;
1724         if (vha->req->ring_index == vha->req->length) {
1725                 vha->req->ring_index = 0;
1726                 vha->req->ring_ptr = vha->req->ring;
1727         } else {
1728                 vha->req->ring_ptr++;
1729         }
1730         return (cont_entry_t *)vha->req->ring_ptr;
1731 }
1732
1733 /* ha->hardware_lock supposed to be held on entry */
1734 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1735 {
1736         struct qla_hw_data *ha = vha->hw;
1737         uint32_t h;
1738
1739         h = ha->tgt.current_handle;
1740         /* always increment cmd handle */
1741         do {
1742                 ++h;
1743                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1744                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1745                 if (h == ha->tgt.current_handle) {
1746                         ql_dbg(ql_dbg_io, vha, 0x305b,
1747                             "qla_target(%d): Ran out of "
1748                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1749                         h = QLA_TGT_NULL_HANDLE;
1750                         break;
1751                 }
1752         } while ((h == QLA_TGT_NULL_HANDLE) ||
1753             (h == QLA_TGT_SKIP_HANDLE) ||
1754             (ha->tgt.cmds[h-1] != NULL));
1755
1756         if (h != QLA_TGT_NULL_HANDLE)
1757                 ha->tgt.current_handle = h;
1758
1759         return h;
1760 }
1761
1762 /* ha->hardware_lock supposed to be held on entry */
1763 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1764         struct scsi_qla_host *vha)
1765 {
1766         uint32_t h;
1767         struct ctio7_to_24xx *pkt;
1768         struct qla_hw_data *ha = vha->hw;
1769         struct atio_from_isp *atio = &prm->cmd->atio;
1770         uint16_t temp;
1771
1772         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1773         prm->pkt = pkt;
1774         memset(pkt, 0, sizeof(*pkt));
1775
1776         pkt->entry_type = CTIO_TYPE7;
1777         pkt->entry_count = (uint8_t)prm->req_cnt;
1778         pkt->vp_index = vha->vp_idx;
1779
1780         h = qlt_make_handle(vha);
1781         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1782                 /*
1783                  * CTIO type 7 from the firmware doesn't provide a way to
1784                  * know the initiator's LOOP ID, hence we can't find
1785                  * the session and, so, the command.
1786                  */
1787                 return -EAGAIN;
1788         } else
1789                 ha->tgt.cmds[h-1] = prm->cmd;
1790
1791         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1792         pkt->nport_handle = prm->cmd->loop_id;
1793         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
1794         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1795         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1796         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1797         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1798         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1799         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1800         pkt->u.status0.ox_id = cpu_to_le16(temp);
1801         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1802
1803         return 0;
1804 }
1805
1806 /*
1807  * ha->hardware_lock supposed to be held on entry. We have already made sure
1808  * that there is sufficient amount of request entries to not drop it.
1809  */
1810 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1811         struct scsi_qla_host *vha)
1812 {
1813         int cnt;
1814         uint32_t *dword_ptr;
1815         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1816
1817         /* Build continuation packets */
1818         while (prm->seg_cnt > 0) {
1819                 cont_a64_entry_t *cont_pkt64 =
1820                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1821
1822                 /*
1823                  * Make sure that from cont_pkt64 none of
1824                  * 64-bit specific fields used for 32-bit
1825                  * addressing. Cast to (cont_entry_t *) for
1826                  * that.
1827                  */
1828
1829                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1830
1831                 cont_pkt64->entry_count = 1;
1832                 cont_pkt64->sys_define = 0;
1833
1834                 if (enable_64bit_addressing) {
1835                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1836                         dword_ptr =
1837                             (uint32_t *)&cont_pkt64->dseg_0_address;
1838                 } else {
1839                         cont_pkt64->entry_type = CONTINUE_TYPE;
1840                         dword_ptr =
1841                             (uint32_t *)&((cont_entry_t *)
1842                                 cont_pkt64)->dseg_0_address;
1843                 }
1844
1845                 /* Load continuation entry data segments */
1846                 for (cnt = 0;
1847                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1848                     cnt++, prm->seg_cnt--) {
1849                         *dword_ptr++ =
1850                             cpu_to_le32(pci_dma_lo32
1851                                 (sg_dma_address(prm->sg)));
1852                         if (enable_64bit_addressing) {
1853                                 *dword_ptr++ =
1854                                     cpu_to_le32(pci_dma_hi32
1855                                         (sg_dma_address
1856                                         (prm->sg)));
1857                         }
1858                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1859
1860                         prm->sg = sg_next(prm->sg);
1861                 }
1862         }
1863 }
1864
1865 /*
1866  * ha->hardware_lock supposed to be held on entry. We have already made sure
1867  * that there is sufficient amount of request entries to not drop it.
1868  */
1869 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1870         struct scsi_qla_host *vha)
1871 {
1872         int cnt;
1873         uint32_t *dword_ptr;
1874         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1875         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1876
1877         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1878
1879         /* Setup packet address segment pointer */
1880         dword_ptr = pkt24->u.status0.dseg_0_address;
1881
1882         /* Set total data segment count */
1883         if (prm->seg_cnt)
1884                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1885
1886         if (prm->seg_cnt == 0) {
1887                 /* No data transfer */
1888                 *dword_ptr++ = 0;
1889                 *dword_ptr = 0;
1890                 return;
1891         }
1892
1893         /* If scatter gather */
1894
1895         /* Load command entry data segments */
1896         for (cnt = 0;
1897             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1898             cnt++, prm->seg_cnt--) {
1899                 *dword_ptr++ =
1900                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1901                 if (enable_64bit_addressing) {
1902                         *dword_ptr++ =
1903                             cpu_to_le32(pci_dma_hi32(
1904                                 sg_dma_address(prm->sg)));
1905                 }
1906                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1907
1908                 prm->sg = sg_next(prm->sg);
1909         }
1910
1911         qlt_load_cont_data_segments(prm, vha);
1912 }
1913
1914 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1915 {
1916         return cmd->bufflen > 0;
1917 }
1918
1919 /*
1920  * Called without ha->hardware_lock held
1921  */
1922 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1923         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1924         uint32_t *full_req_cnt)
1925 {
1926         struct qla_tgt *tgt = cmd->tgt;
1927         struct scsi_qla_host *vha = tgt->vha;
1928         struct qla_hw_data *ha = vha->hw;
1929         struct se_cmd *se_cmd = &cmd->se_cmd;
1930
1931         prm->cmd = cmd;
1932         prm->tgt = tgt;
1933         prm->rq_result = scsi_status;
1934         prm->sense_buffer = &cmd->sense_buffer[0];
1935         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1936         prm->sg = NULL;
1937         prm->seg_cnt = -1;
1938         prm->req_cnt = 1;
1939         prm->add_status_pkt = 0;
1940
1941         /* Send marker if required */
1942         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1943                 return -EFAULT;
1944
1945         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1946                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1947                         return -EAGAIN;
1948         }
1949
1950         *full_req_cnt = prm->req_cnt;
1951
1952         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1953                 prm->residual = se_cmd->residual_count;
1954                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1955                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1956                        prm->residual, se_cmd->tag,
1957                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1958                        cmd->bufflen, prm->rq_result);
1959                 prm->rq_result |= SS_RESIDUAL_UNDER;
1960         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1961                 prm->residual = se_cmd->residual_count;
1962                 ql_dbg(ql_dbg_io, vha, 0x305d,
1963                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1964                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
1965                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
1966                 prm->rq_result |= SS_RESIDUAL_OVER;
1967         }
1968
1969         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1970                 /*
1971                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1972                  * ignored in *xmit_response() below
1973                  */
1974                 if (qlt_has_data(cmd)) {
1975                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1976                             (IS_FWI2_CAPABLE(ha) &&
1977                             (prm->rq_result != 0))) {
1978                                 prm->add_status_pkt = 1;
1979                                 (*full_req_cnt)++;
1980                         }
1981                 }
1982         }
1983
1984         return 0;
1985 }
1986
1987 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1988         struct qla_tgt_cmd *cmd, int sending_sense)
1989 {
1990         if (ha->tgt.enable_class_2)
1991                 return 0;
1992
1993         if (sending_sense)
1994                 return cmd->conf_compl_supported;
1995         else
1996                 return ha->tgt.enable_explicit_conf &&
1997                     cmd->conf_compl_supported;
1998 }
1999
2000 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
2001 /*
2002  *  Original taken from the XFS code
2003  */
2004 static unsigned long qlt_srr_random(void)
2005 {
2006         static int Inited;
2007         static unsigned long RandomValue;
2008         static DEFINE_SPINLOCK(lock);
2009         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2010         register long rv;
2011         register long lo;
2012         register long hi;
2013         unsigned long flags;
2014
2015         spin_lock_irqsave(&lock, flags);
2016         if (!Inited) {
2017                 RandomValue = jiffies;
2018                 Inited = 1;
2019         }
2020         rv = RandomValue;
2021         hi = rv / 127773;
2022         lo = rv % 127773;
2023         rv = 16807 * lo - 2836 * hi;
2024         if (rv <= 0)
2025                 rv += 2147483647;
2026         RandomValue = rv;
2027         spin_unlock_irqrestore(&lock, flags);
2028         return rv;
2029 }
2030
2031 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2032 {
2033 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2034         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2035             == 50) {
2036                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2037                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2038                     "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2039         }
2040 #endif
2041         /*
2042          * It's currently not possible to simulate SRRs for FCP_WRITE without
2043          * a physical link layer failure, so don't even try here..
2044          */
2045         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2046                 return;
2047
2048         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2049             ((qlt_srr_random() % 100) == 20)) {
2050                 int i, leave = 0;
2051                 unsigned int tot_len = 0;
2052
2053                 while (leave == 0)
2054                         leave = qlt_srr_random() % cmd->sg_cnt;
2055
2056                 for (i = 0; i < leave; i++)
2057                         tot_len += cmd->sg[i].length;
2058
2059                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2060                     "Cutting cmd %p (tag %d) buffer"
2061                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2062                     " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2063                     cmd->bufflen, cmd->sg_cnt);
2064
2065                 cmd->bufflen = tot_len;
2066                 cmd->sg_cnt = leave;
2067         }
2068
2069         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2070                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2071
2072                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2073                     "Cutting cmd %p (tag %d) buffer head "
2074                     "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2075                     cmd->bufflen);
2076                 if (offset == 0)
2077                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
2078                 else if (qlt_set_data_offset(cmd, offset)) {
2079                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2080                             "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2081                 }
2082         }
2083 }
2084 #else
2085 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2086 {}
2087 #endif
2088
2089 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2090         struct qla_tgt_prm *prm)
2091 {
2092         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2093             (uint32_t)sizeof(ctio->u.status1.sense_data));
2094         ctio->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2095         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2096                 ctio->u.status0.flags |= cpu_to_le16(
2097                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2098                     CTIO7_FLAGS_CONFORM_REQ);
2099         }
2100         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2101         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2102         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2103                 int i;
2104
2105                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2106                         if (prm->cmd->se_cmd.scsi_status != 0) {
2107                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2108                                     "Skipping EXPLICIT_CONFORM and "
2109                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2110                                     "non GOOD status\n");
2111                                 goto skip_explict_conf;
2112                         }
2113                         ctio->u.status1.flags |= cpu_to_le16(
2114                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2115                             CTIO7_FLAGS_CONFORM_REQ);
2116                 }
2117 skip_explict_conf:
2118                 ctio->u.status1.flags &=
2119                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2120                 ctio->u.status1.flags |=
2121                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2122                 ctio->u.status1.scsi_status |=
2123                     cpu_to_le16(SS_SENSE_LEN_VALID);
2124                 ctio->u.status1.sense_length =
2125                     cpu_to_le16(prm->sense_buffer_len);
2126                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2127                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2128                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2129 #if 0
2130                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2131                         static int q;
2132                         if (q < 10) {
2133                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2134                                     "qla_target(%d): %d bytes of sense "
2135                                     "lost", prm->tgt->ha->vp_idx,
2136                                     prm->sense_buffer_len % 4);
2137                                 q++;
2138                         }
2139                 }
2140 #endif
2141         } else {
2142                 ctio->u.status1.flags &=
2143                     ~cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2144                 ctio->u.status1.flags |=
2145                     cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2146                 ctio->u.status1.sense_length = 0;
2147                 memset(ctio->u.status1.sense_data, 0,
2148                     sizeof(ctio->u.status1.sense_data));
2149         }
2150
2151         /* Sense with len > 24, is it possible ??? */
2152 }
2153
2154
2155
2156 /* diff  */
2157 static inline int
2158 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2159 {
2160         /*
2161          * Uncomment when corresponding SCSI changes are done.
2162          *
2163          if (!sp->cmd->prot_chk)
2164          return 0;
2165          *
2166          */
2167         switch (se_cmd->prot_op) {
2168         case TARGET_PROT_DOUT_INSERT:
2169         case TARGET_PROT_DIN_STRIP:
2170                 if (ql2xenablehba_err_chk >= 1)
2171                         return 1;
2172                 break;
2173         case TARGET_PROT_DOUT_PASS:
2174         case TARGET_PROT_DIN_PASS:
2175                 if (ql2xenablehba_err_chk >= 2)
2176                         return 1;
2177                 break;
2178         case TARGET_PROT_DIN_INSERT:
2179         case TARGET_PROT_DOUT_STRIP:
2180                 return 1;
2181         default:
2182                 break;
2183         }
2184         return 0;
2185 }
2186
2187 /*
2188  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2189  *
2190  */
2191 static inline void
2192 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2193 {
2194         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2195
2196         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2197          * have been immplemented by TCM, before AppTag is avail.
2198          * Look for modesense_handlers[]
2199          */
2200         ctx->app_tag = 0;
2201         ctx->app_tag_mask[0] = 0x0;
2202         ctx->app_tag_mask[1] = 0x0;
2203
2204         switch (se_cmd->prot_type) {
2205         case TARGET_DIF_TYPE0_PROT:
2206                 /*
2207                  * No check for ql2xenablehba_err_chk, as it would be an
2208                  * I/O error if hba tag generation is not done.
2209                  */
2210                 ctx->ref_tag = cpu_to_le32(lba);
2211
2212                 if (!qlt_hba_err_chk_enabled(se_cmd))
2213                         break;
2214
2215                 /* enable ALL bytes of the ref tag */
2216                 ctx->ref_tag_mask[0] = 0xff;
2217                 ctx->ref_tag_mask[1] = 0xff;
2218                 ctx->ref_tag_mask[2] = 0xff;
2219                 ctx->ref_tag_mask[3] = 0xff;
2220                 break;
2221         /*
2222          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2223          * 16 bit app tag.
2224          */
2225         case TARGET_DIF_TYPE1_PROT:
2226                 ctx->ref_tag = cpu_to_le32(lba);
2227
2228                 if (!qlt_hba_err_chk_enabled(se_cmd))
2229                         break;
2230
2231                 /* enable ALL bytes of the ref tag */
2232                 ctx->ref_tag_mask[0] = 0xff;
2233                 ctx->ref_tag_mask[1] = 0xff;
2234                 ctx->ref_tag_mask[2] = 0xff;
2235                 ctx->ref_tag_mask[3] = 0xff;
2236                 break;
2237         /*
2238          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2239          * match LBA in CDB + N
2240          */
2241         case TARGET_DIF_TYPE2_PROT:
2242                 ctx->ref_tag = cpu_to_le32(lba);
2243
2244                 if (!qlt_hba_err_chk_enabled(se_cmd))
2245                         break;
2246
2247                 /* enable ALL bytes of the ref tag */
2248                 ctx->ref_tag_mask[0] = 0xff;
2249                 ctx->ref_tag_mask[1] = 0xff;
2250                 ctx->ref_tag_mask[2] = 0xff;
2251                 ctx->ref_tag_mask[3] = 0xff;
2252                 break;
2253
2254         /* For Type 3 protection: 16 bit GUARD only */
2255         case TARGET_DIF_TYPE3_PROT:
2256                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2257                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2258                 break;
2259         }
2260 }
2261
2262
2263 static inline int
2264 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2265 {
2266         uint32_t                *cur_dsd;
2267         uint32_t                transfer_length = 0;
2268         uint32_t                data_bytes;
2269         uint32_t                dif_bytes;
2270         uint8_t                 bundling = 1;
2271         uint8_t                 *clr_ptr;
2272         struct crc_context      *crc_ctx_pkt = NULL;
2273         struct qla_hw_data      *ha;
2274         struct ctio_crc2_to_fw  *pkt;
2275         dma_addr_t              crc_ctx_dma;
2276         uint16_t                fw_prot_opts = 0;
2277         struct qla_tgt_cmd      *cmd = prm->cmd;
2278         struct se_cmd           *se_cmd = &cmd->se_cmd;
2279         uint32_t h;
2280         struct atio_from_isp *atio = &prm->cmd->atio;
2281         uint16_t t16;
2282
2283         ha = vha->hw;
2284
2285         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2286         prm->pkt = pkt;
2287         memset(pkt, 0, sizeof(*pkt));
2288
2289         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2290                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2291                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2292                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2293
2294         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2295             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2296                 bundling = 0;
2297
2298         /* Compute dif len and adjust data len to incude protection */
2299         data_bytes = cmd->bufflen;
2300         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2301
2302         switch (se_cmd->prot_op) {
2303         case TARGET_PROT_DIN_INSERT:
2304         case TARGET_PROT_DOUT_STRIP:
2305                 transfer_length = data_bytes;
2306                 data_bytes += dif_bytes;
2307                 break;
2308
2309         case TARGET_PROT_DIN_STRIP:
2310         case TARGET_PROT_DOUT_INSERT:
2311         case TARGET_PROT_DIN_PASS:
2312         case TARGET_PROT_DOUT_PASS:
2313                 transfer_length = data_bytes + dif_bytes;
2314                 break;
2315
2316         default:
2317                 BUG();
2318                 break;
2319         }
2320
2321         if (!qlt_hba_err_chk_enabled(se_cmd))
2322                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2323         /* HBA error checking enabled */
2324         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2325                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2326                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2327                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2328                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2329                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2330         }
2331
2332         switch (se_cmd->prot_op) {
2333         case TARGET_PROT_DIN_INSERT:
2334         case TARGET_PROT_DOUT_INSERT:
2335                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2336                 break;
2337         case TARGET_PROT_DIN_STRIP:
2338         case TARGET_PROT_DOUT_STRIP:
2339                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2340                 break;
2341         case TARGET_PROT_DIN_PASS:
2342         case TARGET_PROT_DOUT_PASS:
2343                 fw_prot_opts |= PO_MODE_DIF_PASS;
2344                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2345                 break;
2346         default:/* Normal Request */
2347                 fw_prot_opts |= PO_MODE_DIF_PASS;
2348                 break;
2349         }
2350
2351
2352         /* ---- PKT ---- */
2353         /* Update entry type to indicate Command Type CRC_2 IOCB */
2354         pkt->entry_type  = CTIO_CRC2;
2355         pkt->entry_count = 1;
2356         pkt->vp_index = vha->vp_idx;
2357
2358         h = qlt_make_handle(vha);
2359         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2360                 /*
2361                  * CTIO type 7 from the firmware doesn't provide a way to
2362                  * know the initiator's LOOP ID, hence we can't find
2363                  * the session and, so, the command.
2364                  */
2365                 return -EAGAIN;
2366         } else
2367                 ha->tgt.cmds[h-1] = prm->cmd;
2368
2369
2370         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2371         pkt->nport_handle = prm->cmd->loop_id;
2372         pkt->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2373         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2374         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2375         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2376         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2377
2378         /* silence compile warning */
2379         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2380         pkt->ox_id  = cpu_to_le16(t16);
2381
2382         t16 = (atio->u.isp24.attr << 9);
2383         pkt->flags |= cpu_to_le16(t16);
2384         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2385
2386         /* Set transfer direction */
2387         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2388                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2389         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2390                 pkt->flags = cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2391
2392
2393         pkt->dseg_count = prm->tot_dsds;
2394         /* Fibre channel byte count */
2395         pkt->transfer_length = cpu_to_le32(transfer_length);
2396
2397
2398         /* ----- CRC context -------- */
2399
2400         /* Allocate CRC context from global pool */
2401         crc_ctx_pkt = cmd->ctx =
2402             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2403
2404         if (!crc_ctx_pkt)
2405                 goto crc_queuing_error;
2406
2407         /* Zero out CTX area. */
2408         clr_ptr = (uint8_t *)crc_ctx_pkt;
2409         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2410
2411         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2412         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2413
2414         /* Set handle */
2415         crc_ctx_pkt->handle = pkt->handle;
2416
2417         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2418
2419         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2420         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2421         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2422
2423
2424         if (!bundling) {
2425                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2426         } else {
2427                 /*
2428                  * Configure Bundling if we need to fetch interlaving
2429                  * protection PCI accesses
2430                  */
2431                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2432                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2433                 crc_ctx_pkt->u.bundling.dseg_count =
2434                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2435                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2436         }
2437
2438         /* Finish the common fields of CRC pkt */
2439         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2440         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2441         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2442         crc_ctx_pkt->guard_seed = cpu_to_le16(0);
2443
2444
2445         /* Walks data segments */
2446         pkt->flags |= cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2447
2448         if (!bundling && prm->prot_seg_cnt) {
2449                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2450                         prm->tot_dsds, cmd))
2451                         goto crc_queuing_error;
2452         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2453                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2454                 goto crc_queuing_error;
2455
2456         if (bundling && prm->prot_seg_cnt) {
2457                 /* Walks dif segments */
2458                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2459
2460                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2461                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2462                         prm->prot_seg_cnt, cmd))
2463                         goto crc_queuing_error;
2464         }
2465         return QLA_SUCCESS;
2466
2467 crc_queuing_error:
2468         /* Cleanup will be performed by the caller */
2469
2470         return QLA_FUNCTION_FAILED;
2471 }
2472
2473
2474 /*
2475  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2476  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2477  */
2478 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2479         uint8_t scsi_status)
2480 {
2481         struct scsi_qla_host *vha = cmd->vha;
2482         struct qla_hw_data *ha = vha->hw;
2483         struct ctio7_to_24xx *pkt;
2484         struct qla_tgt_prm prm;
2485         uint32_t full_req_cnt = 0;
2486         unsigned long flags = 0;
2487         int res;
2488
2489         spin_lock_irqsave(&ha->hardware_lock, flags);
2490         if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2491                 cmd->state = QLA_TGT_STATE_PROCESSED;
2492                 if (cmd->sess->logout_completed)
2493                         /* no need to terminate. FW already freed exchange. */
2494                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2495                 else
2496                         qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2497                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2498                 return 0;
2499         }
2500         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2501
2502         memset(&prm, 0, sizeof(prm));
2503         qlt_check_srr_debug(cmd, &xmit_type);
2504
2505         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2506             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2507             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2508             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2509             &cmd->se_cmd);
2510
2511         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2512             &full_req_cnt);
2513         if (unlikely(res != 0)) {
2514                 return res;
2515         }
2516
2517         spin_lock_irqsave(&ha->hardware_lock, flags);
2518
2519         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2520                 /*
2521                  * Either a chip reset is active or this request was from
2522                  * previous life, just abort the processing.
2523                  */
2524                 cmd->state = QLA_TGT_STATE_PROCESSED;
2525                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2526                 ql_dbg(ql_dbg_async, vha, 0xe101,
2527                         "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2528                         qla2x00_reset_active(vha), cmd->reset_count,
2529                         ha->chip_reset);
2530                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2531                 return 0;
2532         }
2533
2534         /* Does F/W have an IOCBs for this request */
2535         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2536         if (unlikely(res))
2537                 goto out_unmap_unlock;
2538
2539         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2540                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2541         else
2542                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2543         if (unlikely(res != 0)) {
2544                 vha->req->cnt += full_req_cnt;
2545                 goto out_unmap_unlock;
2546         }
2547
2548         pkt = (struct ctio7_to_24xx *)prm.pkt;
2549
2550         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2551                 pkt->u.status0.flags |=
2552                     cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2553                         CTIO7_FLAGS_STATUS_MODE_0);
2554
2555                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2556                         qlt_load_data_segments(&prm, vha);
2557
2558                 if (prm.add_status_pkt == 0) {
2559                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2560                                 pkt->u.status0.scsi_status =
2561                                     cpu_to_le16(prm.rq_result);
2562                                 pkt->u.status0.residual =
2563                                     cpu_to_le32(prm.residual);
2564                                 pkt->u.status0.flags |= cpu_to_le16(
2565                                     CTIO7_FLAGS_SEND_STATUS);
2566                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2567                                         pkt->u.status0.flags |=
2568                                             cpu_to_le16(
2569                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2570                                                 CTIO7_FLAGS_CONFORM_REQ);
2571                                 }
2572                         }
2573
2574                 } else {
2575                         /*
2576                          * We have already made sure that there is sufficient
2577                          * amount of request entries to not drop HW lock in
2578                          * req_pkt().
2579                          */
2580                         struct ctio7_to_24xx *ctio =
2581                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2582
2583                         ql_dbg(ql_dbg_io, vha, 0x305e,
2584                             "Building additional status packet 0x%p.\n",
2585                             ctio);
2586
2587                         /*
2588                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2589                          * ctio7_to_24xx
2590                          */
2591                         memcpy(ctio, pkt, sizeof(*ctio));
2592                         /* reset back to CTIO7 */
2593                         ctio->entry_count = 1;
2594                         ctio->entry_type = CTIO_TYPE7;
2595                         ctio->dseg_count = 0;
2596                         ctio->u.status1.flags &= ~cpu_to_le16(
2597                             CTIO7_FLAGS_DATA_IN);
2598
2599                         /* Real finish is ctio_m1's finish */
2600                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2601                         pkt->u.status0.flags |= cpu_to_le16(
2602                             CTIO7_FLAGS_DONT_RET_CTIO);
2603
2604                         /* qlt_24xx_init_ctio_to_isp will correct
2605                          * all neccessary fields that's part of CTIO7.
2606                          * There should be no residual of CTIO-CRC2 data.
2607                          */
2608                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2609                             &prm);
2610                         pr_debug("Status CTIO7: %p\n", ctio);
2611                 }
2612         } else
2613                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2614
2615
2616         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2617         cmd->cmd_sent_to_fw = 1;
2618
2619         /* Memory Barrier */
2620         wmb();
2621         qla2x00_start_iocbs(vha, vha->req);
2622         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2623
2624         return 0;
2625
2626 out_unmap_unlock:
2627         qlt_unmap_sg(vha, cmd);
2628         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2629
2630         return res;
2631 }
2632 EXPORT_SYMBOL(qlt_xmit_response);
2633
2634 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2635 {
2636         struct ctio7_to_24xx *pkt;
2637         struct scsi_qla_host *vha = cmd->vha;
2638         struct qla_hw_data *ha = vha->hw;
2639         struct qla_tgt *tgt = cmd->tgt;
2640         struct qla_tgt_prm prm;
2641         unsigned long flags;
2642         int res = 0;
2643
2644         memset(&prm, 0, sizeof(prm));
2645         prm.cmd = cmd;
2646         prm.tgt = tgt;
2647         prm.sg = NULL;
2648         prm.req_cnt = 1;
2649
2650         /* Send marker if required */
2651         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2652                 return -EIO;
2653
2654         /* Calculate number of entries and segments required */
2655         if (qlt_pci_map_calc_cnt(&prm) != 0)
2656                 return -EAGAIN;
2657
2658         spin_lock_irqsave(&ha->hardware_lock, flags);
2659
2660         if (qla2x00_reset_active(vha) || (cmd->reset_count != ha->chip_reset) ||
2661             (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2662                 /*
2663                  * Either a chip reset is active or this request was from
2664                  * previous life, just abort the processing.
2665                  */
2666                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2667                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2668                 ql_dbg(ql_dbg_async, vha, 0xe102,
2669                         "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2670                         qla2x00_reset_active(vha), cmd->reset_count,
2671                         ha->chip_reset);
2672                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2673                 return 0;
2674         }
2675
2676         /* Does F/W have an IOCBs for this request */
2677         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2678         if (res != 0)
2679                 goto out_unlock_free_unmap;
2680         if (cmd->se_cmd.prot_op)
2681                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2682         else
2683                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2684
2685         if (unlikely(res != 0)) {
2686                 vha->req->cnt += prm.req_cnt;
2687                 goto out_unlock_free_unmap;
2688         }
2689
2690         pkt = (struct ctio7_to_24xx *)prm.pkt;
2691         pkt->u.status0.flags |= cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2692             CTIO7_FLAGS_STATUS_MODE_0);
2693
2694         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2695                 qlt_load_data_segments(&prm, vha);
2696
2697         cmd->state = QLA_TGT_STATE_NEED_DATA;
2698         cmd->cmd_sent_to_fw = 1;
2699
2700         /* Memory Barrier */
2701         wmb();
2702         qla2x00_start_iocbs(vha, vha->req);
2703         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2704
2705         return res;
2706
2707 out_unlock_free_unmap:
2708         qlt_unmap_sg(vha, cmd);
2709         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2710
2711         return res;
2712 }
2713 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2714
2715
2716 /*
2717  * Checks the guard or meta-data for the type of error
2718  * detected by the HBA.
2719  */
2720 static inline int
2721 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2722                 struct ctio_crc_from_fw *sts)
2723 {
2724         uint8_t         *ap = &sts->actual_dif[0];
2725         uint8_t         *ep = &sts->expected_dif[0];
2726         uint32_t        e_ref_tag, a_ref_tag;
2727         uint16_t        e_app_tag, a_app_tag;
2728         uint16_t        e_guard, a_guard;
2729         uint64_t        lba = cmd->se_cmd.t_task_lba;
2730
2731         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2732         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2733         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2734
2735         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2736         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2737         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2738
2739         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2740             "iocb(s) %p Returned STATUS.\n", sts);
2741
2742         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2743             "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",
2744             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2745             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2746
2747         /*
2748          * Ignore sector if:
2749          * For type     3: ref & app tag is all 'f's
2750          * For type 0,1,2: app tag is all 'f's
2751          */
2752         if ((a_app_tag == 0xffff) &&
2753             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2754              (a_ref_tag == 0xffffffff))) {
2755                 uint32_t blocks_done;
2756
2757                 /* 2TB boundary case covered automatically with this */
2758                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2759                 cmd->se_cmd.bad_sector = e_ref_tag;
2760                 cmd->se_cmd.pi_err = 0;
2761                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2762                         "need to return scsi good\n");
2763
2764                 /* Update protection tag */
2765                 if (cmd->prot_sg_cnt) {
2766                         uint32_t i, k = 0, num_ent;
2767                         struct scatterlist *sg, *sgl;
2768
2769
2770                         sgl = cmd->prot_sg;
2771
2772                         /* Patch the corresponding protection tags */
2773                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2774                                 num_ent = sg_dma_len(sg) / 8;
2775                                 if (k + num_ent < blocks_done) {
2776                                         k += num_ent;
2777                                         continue;
2778                                 }
2779                                 k = blocks_done;
2780                                 break;
2781                         }
2782
2783                         if (k != blocks_done) {
2784                                 ql_log(ql_log_warn, vha, 0xf076,
2785                                     "unexpected tag values tag:lba=%u:%llu)\n",
2786                                     e_ref_tag, (unsigned long long)lba);
2787                                 goto out;
2788                         }
2789
2790 #if 0
2791                         struct sd_dif_tuple *spt;
2792                         /* TODO:
2793                          * This section came from initiator. Is it valid here?
2794                          * should ulp be override with actual val???
2795                          */
2796                         spt = page_address(sg_page(sg)) + sg->offset;
2797                         spt += j;
2798
2799                         spt->app_tag = 0xffff;
2800                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2801                                 spt->ref_tag = 0xffffffff;
2802 #endif
2803                 }
2804
2805                 return 0;
2806         }
2807
2808         /* check guard */
2809         if (e_guard != a_guard) {
2810                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2811                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2812
2813                 ql_log(ql_log_warn, vha, 0xe076,
2814                     "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",
2815                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2816                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2817                     a_guard, e_guard, cmd);
2818                 goto out;
2819         }
2820
2821         /* check ref tag */
2822         if (e_ref_tag != a_ref_tag) {
2823                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2824                 cmd->se_cmd.bad_sector = e_ref_tag;
2825
2826                 ql_log(ql_log_warn, vha, 0xe077,
2827                         "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",
2828                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2829                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2830                         a_guard, e_guard, cmd);
2831                 goto out;
2832         }
2833
2834         /* check appl tag */
2835         if (e_app_tag != a_app_tag) {
2836                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2837                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2838
2839                 ql_log(ql_log_warn, vha, 0xe078,
2840                         "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",
2841                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2842                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2843                         a_guard, e_guard, cmd);
2844                 goto out;
2845         }
2846 out:
2847         return 1;
2848 }
2849
2850
2851 /* If hardware_lock held on entry, might drop it, then reaquire */
2852 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2853 static int __qlt_send_term_imm_notif(struct scsi_qla_host *vha,
2854         struct imm_ntfy_from_isp *ntfy)
2855 {
2856         struct nack_to_isp *nack;
2857         struct qla_hw_data *ha = vha->hw;
2858         request_t *pkt;
2859         int ret = 0;
2860
2861         ql_dbg(ql_dbg_tgt_tmr, vha, 0xe01c,
2862             "Sending TERM ELS CTIO (ha=%p)\n", ha);
2863
2864         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2865         if (pkt == NULL) {
2866                 ql_dbg(ql_dbg_tgt, vha, 0xe080,
2867                     "qla_target(%d): %s failed: unable to allocate "
2868                     "request packet\n", vha->vp_idx, __func__);
2869                 return -ENOMEM;
2870         }
2871
2872         pkt->entry_type = NOTIFY_ACK_TYPE;
2873         pkt->entry_count = 1;
2874         pkt->handle = QLA_TGT_SKIP_HANDLE;
2875
2876         nack = (struct nack_to_isp *)pkt;
2877         nack->ox_id = ntfy->ox_id;
2878
2879         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
2880         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
2881                 nack->u.isp24.flags = ntfy->u.isp24.flags &
2882                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
2883         }
2884
2885         /* terminate */
2886         nack->u.isp24.flags |=
2887                 __constant_cpu_to_le16(NOTIFY_ACK_FLAGS_TERMINATE);
2888
2889         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
2890         nack->u.isp24.status = ntfy->u.isp24.status;
2891         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
2892         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
2893         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
2894         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
2895         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
2896         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
2897
2898         qla2x00_start_iocbs(vha, vha->req);
2899         return ret;
2900 }
2901
2902 static void qlt_send_term_imm_notif(struct scsi_qla_host *vha,
2903         struct imm_ntfy_from_isp *imm, int ha_locked)
2904 {
2905         unsigned long flags = 0;
2906         int rc;
2907
2908         if (qlt_issue_marker(vha, ha_locked) < 0)
2909                 return;
2910
2911         if (ha_locked) {
2912                 rc = __qlt_send_term_imm_notif(vha, imm);
2913
2914 #if 0   /* Todo  */
2915                 if (rc == -ENOMEM)
2916                         qlt_alloc_qfull_cmd(vha, imm, 0, 0);
2917 #endif
2918                 goto done;
2919         }
2920
2921         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2922         rc = __qlt_send_term_imm_notif(vha, imm);
2923
2924 #if 0   /* Todo */
2925         if (rc == -ENOMEM)
2926                 qlt_alloc_qfull_cmd(vha, imm, 0, 0);
2927 #endif
2928
2929 done:
2930         if (!ha_locked)
2931                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2932 }
2933
2934 /* If hardware_lock held on entry, might drop it, then reaquire */
2935 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2936 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2937         struct qla_tgt_cmd *cmd,
2938         struct atio_from_isp *atio)
2939 {
2940         struct ctio7_to_24xx *ctio24;
2941         struct qla_hw_data *ha = vha->hw;
2942         request_t *pkt;
2943         int ret = 0;
2944         uint16_t temp;
2945
2946         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2947
2948         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2949         if (pkt == NULL) {
2950                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2951                     "qla_target(%d): %s failed: unable to allocate "
2952                     "request packet\n", vha->vp_idx, __func__);
2953                 return -ENOMEM;
2954         }
2955
2956         if (cmd != NULL) {
2957                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2958                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2959                             "qla_target(%d): Terminating cmd %p with "
2960                             "incorrect state %d\n", vha->vp_idx, cmd,
2961                             cmd->state);
2962                 } else
2963                         ret = 1;
2964         }
2965
2966         pkt->entry_count = 1;
2967         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2968
2969         ctio24 = (struct ctio7_to_24xx *)pkt;
2970         ctio24->entry_type = CTIO_TYPE7;
2971         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2972         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
2973         ctio24->vp_index = vha->vp_idx;
2974         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2975         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2976         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2977         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2978         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2979             cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2980                 CTIO7_FLAGS_TERMINATE);
2981         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2982         ctio24->u.status1.ox_id = cpu_to_le16(temp);
2983
2984         /* Most likely, it isn't needed */
2985         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2986             &atio->u.isp24.fcp_cmnd.add_cdb[
2987             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2988         if (ctio24->u.status1.residual != 0)
2989                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2990
2991         /* Memory Barrier */
2992         wmb();
2993         qla2x00_start_iocbs(vha, vha->req);
2994         return ret;
2995 }
2996
2997 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2998         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2999 {
3000         unsigned long flags = 0;
3001         int rc;
3002
3003         if (qlt_issue_marker(vha, ha_locked) < 0)
3004                 return;
3005
3006         if (ha_locked) {
3007                 rc = __qlt_send_term_exchange(vha, cmd, atio);
3008                 if (rc == -ENOMEM)
3009                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3010                 goto done;
3011         }
3012         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
3013         rc = __qlt_send_term_exchange(vha, cmd, atio);
3014         if (rc == -ENOMEM)
3015                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
3016
3017 done:
3018         if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
3019             !cmd->cmd_sent_to_fw)) {
3020                 if (cmd->sg_mapped)
3021                         qlt_unmap_sg(vha, cmd);
3022                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
3023         }
3024
3025         if (!ha_locked)
3026                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
3027
3028         return;
3029 }
3030
3031 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
3032 {
3033         struct list_head free_list;
3034         struct qla_tgt_cmd *cmd, *tcmd;
3035
3036         vha->hw->tgt.leak_exchg_thresh_hold =
3037             (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
3038
3039         cmd = tcmd = NULL;
3040         if (!list_empty(&vha->hw->tgt.q_full_list)) {
3041                 INIT_LIST_HEAD(&free_list);
3042                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
3043
3044                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
3045                         list_del(&cmd->cmd_list);
3046                         /* This cmd was never sent to TCM.  There is no need
3047                          * to schedule free or call free_cmd
3048                          */
3049                         qlt_free_cmd(cmd);
3050                         vha->hw->tgt.num_qfull_cmds_alloc--;
3051                 }
3052         }
3053         vha->hw->tgt.num_qfull_cmds_dropped = 0;
3054 }
3055
3056 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
3057 {
3058         uint32_t total_leaked;
3059
3060         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
3061
3062         if (vha->hw->tgt.leak_exchg_thresh_hold &&
3063             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
3064
3065                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
3066                     "Chip reset due to exchange starvation: %d/%d.\n",
3067                     total_leaked, vha->hw->fw_xcb_count);
3068
3069                 if (IS_P3P_TYPE(vha->hw))
3070                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
3071                 else
3072                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3073                 qla2xxx_wake_dpc(vha);
3074         }
3075
3076 }
3077
3078 void qlt_abort_cmd(struct qla_tgt_cmd *cmd)
3079 {
3080         struct qla_tgt *tgt = cmd->tgt;
3081         struct scsi_qla_host *vha = tgt->vha;
3082         struct se_cmd *se_cmd = &cmd->se_cmd;
3083
3084         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
3085             "qla_target(%d): terminating exchange for aborted cmd=%p "
3086             "(se_cmd=%p, tag=%llu)", vha->vp_idx, cmd, &cmd->se_cmd,
3087             se_cmd->tag);
3088
3089         cmd->state = QLA_TGT_STATE_ABORTED;
3090         cmd->cmd_flags |= BIT_6;
3091
3092         qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
3093 }
3094 EXPORT_SYMBOL(qlt_abort_cmd);
3095
3096 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
3097 {
3098         struct qla_tgt_sess *sess = cmd->sess;
3099
3100         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
3101             "%s: se_cmd[%p] ox_id %04x\n",
3102             __func__, &cmd->se_cmd,
3103             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
3104
3105         BUG_ON(cmd->cmd_in_wq);
3106
3107         if (!cmd->q_full)
3108                 qlt_decr_num_pend_cmds(cmd->vha);
3109
3110         BUG_ON(cmd->sg_mapped);
3111         cmd->jiffies_at_free = get_jiffies_64();
3112         if (unlikely(cmd->free_sg))
3113                 kfree(cmd->sg);
3114
3115         if (!sess || !sess->se_sess) {
3116                 WARN_ON(1);
3117                 return;
3118         }
3119         cmd->jiffies_at_free = get_jiffies_64();
3120         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3121 }
3122 EXPORT_SYMBOL(qlt_free_cmd);
3123
3124 /* ha->hardware_lock supposed to be held on entry */
3125 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
3126         struct qla_tgt_cmd *cmd, void *ctio)
3127 {
3128         struct qla_tgt_srr_ctio *sc;
3129         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3130         struct qla_tgt_srr_imm *imm;
3131
3132         tgt->ctio_srr_id++;
3133         cmd->cmd_flags |= BIT_15;
3134
3135         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
3136             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
3137
3138         if (!ctio) {
3139                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
3140                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
3141                     vha->vp_idx);
3142                 return -EINVAL;
3143         }
3144
3145         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
3146         if (sc != NULL) {
3147                 sc->cmd = cmd;
3148                 /* IRQ is already OFF */
3149                 spin_lock(&tgt->srr_lock);
3150                 sc->srr_id = tgt->ctio_srr_id;
3151                 list_add_tail(&sc->srr_list_entry,
3152                     &tgt->srr_ctio_list);
3153                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
3154                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
3155                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3156                         int found = 0;
3157                         list_for_each_entry(imm, &tgt->srr_imm_list,
3158                             srr_list_entry) {
3159                                 if (imm->srr_id == sc->srr_id) {
3160                                         found = 1;
3161                                         break;
3162                                 }
3163                         }
3164                         if (found) {
3165                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
3166                                     "Scheduling srr work\n");
3167                                 schedule_work(&tgt->srr_work);
3168                         } else {
3169                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
3170                                     "qla_target(%d): imm_srr_id "
3171                                     "== ctio_srr_id (%d), but there is no "
3172                                     "corresponding SRR IMM, deleting CTIO "
3173                                     "SRR %p\n", vha->vp_idx,
3174                                     tgt->ctio_srr_id, sc);
3175                                 list_del(&sc->srr_list_entry);
3176                                 spin_unlock(&tgt->srr_lock);
3177
3178                                 kfree(sc);
3179                                 return -EINVAL;
3180                         }
3181                 }
3182                 spin_unlock(&tgt->srr_lock);
3183         } else {
3184                 struct qla_tgt_srr_imm *ti;
3185
3186                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
3187                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
3188                     vha->vp_idx);
3189                 spin_lock(&tgt->srr_lock);
3190                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
3191                     srr_list_entry) {
3192                         if (imm->srr_id == tgt->ctio_srr_id) {
3193                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
3194                                     "IMM SRR %p deleted (id %d)\n",
3195                                     imm, imm->srr_id);
3196                                 list_del(&imm->srr_list_entry);
3197                                 qlt_reject_free_srr_imm(vha, imm, 1);
3198                         }
3199                 }
3200                 spin_unlock(&tgt->srr_lock);
3201
3202                 return -ENOMEM;
3203         }
3204
3205         return 0;
3206 }
3207
3208 /*
3209  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3210  */
3211 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
3212         struct qla_tgt_cmd *cmd, uint32_t status)
3213 {
3214         int term = 0;
3215
3216         if (ctio != NULL) {
3217                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
3218                 term = !(c->flags &
3219                     cpu_to_le16(OF_TERM_EXCH));
3220         } else
3221                 term = 1;
3222
3223         if (term)
3224                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3225
3226         return term;
3227 }
3228
3229 /* ha->hardware_lock supposed to be held on entry */
3230 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
3231         uint32_t handle)
3232 {
3233         struct qla_hw_data *ha = vha->hw;
3234
3235         handle--;
3236         if (ha->tgt.cmds[handle] != NULL) {
3237                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
3238                 ha->tgt.cmds[handle] = NULL;
3239                 return cmd;
3240         } else
3241                 return NULL;
3242 }
3243
3244 /* ha->hardware_lock supposed to be held on entry */
3245 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
3246         uint32_t handle, void *ctio)
3247 {
3248         struct qla_tgt_cmd *cmd = NULL;
3249
3250         /* Clear out internal marks */
3251         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
3252             CTIO_INTERMEDIATE_HANDLE_MARK);
3253
3254         if (handle != QLA_TGT_NULL_HANDLE) {
3255                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
3256                         return NULL;
3257
3258                 /* handle-1 is actually used */
3259                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
3260                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
3261                             "qla_target(%d): Wrong handle %x received\n",
3262                             vha->vp_idx, handle);
3263                         return NULL;
3264                 }
3265                 cmd = qlt_get_cmd(vha, handle);
3266                 if (unlikely(cmd == NULL)) {
3267                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
3268                             "qla_target(%d): Suspicious: unable to "
3269                             "find the command with handle %x\n", vha->vp_idx,
3270                             handle);
3271                         return NULL;
3272                 }
3273         } else if (ctio != NULL) {
3274                 /* We can't get loop ID from CTIO7 */
3275                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
3276                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
3277                     "support NULL handles\n", vha->vp_idx);
3278                 return NULL;
3279         }
3280
3281         return cmd;
3282 }
3283
3284 /* hardware_lock should be held by caller. */
3285 static void
3286 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
3287 {
3288         struct qla_hw_data *ha = vha->hw;
3289         uint32_t handle;
3290
3291         if (cmd->sg_mapped)
3292                 qlt_unmap_sg(vha, cmd);
3293
3294         handle = qlt_make_handle(vha);
3295
3296         /* TODO: fix debug message type and ids. */
3297         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3298                 ql_dbg(ql_dbg_io, vha, 0xff00,
3299                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3300         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3301                 cmd->write_data_transferred = 0;
3302                 cmd->state = QLA_TGT_STATE_DATA_IN;
3303
3304                 ql_dbg(ql_dbg_io, vha, 0xff01,
3305                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3306
3307                 ha->tgt.tgt_ops->handle_data(cmd);
3308                 return;
3309         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3310                 ql_dbg(ql_dbg_io, vha, 0xff02,
3311                     "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3312         } else {
3313                 ql_dbg(ql_dbg_io, vha, 0xff03,
3314                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3315                     cmd->state);
3316                 dump_stack();
3317         }
3318
3319         cmd->cmd_flags |= BIT_17;
3320         ha->tgt.tgt_ops->free_cmd(cmd);
3321 }
3322
3323 void
3324 qlt_host_reset_handler(struct qla_hw_data *ha)
3325 {
3326         struct qla_tgt_cmd *cmd;
3327         unsigned long flags;
3328         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3329         scsi_qla_host_t *vha = NULL;
3330         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3331         uint32_t i;
3332
3333         if (!base_vha->hw->tgt.tgt_ops)
3334                 return;
3335
3336         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3337                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3338                         "Target mode disabled\n");
3339                 return;
3340         }
3341
3342         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3343             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3344             base_vha->dpc_flags);
3345
3346         spin_lock_irqsave(&ha->hardware_lock, flags);
3347         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3348                 cmd = qlt_get_cmd(base_vha, i);
3349                 if (!cmd)
3350                         continue;
3351                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3352                 vha = cmd->vha;
3353                 qlt_abort_cmd_on_host_reset(vha, cmd);
3354         }
3355         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3356 }
3357
3358
3359 /*
3360  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3361  */
3362 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3363         uint32_t status, void *ctio)
3364 {
3365         struct qla_hw_data *ha = vha->hw;
3366         struct se_cmd *se_cmd;
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         cmd->cmd_sent_to_fw = 0;
3385
3386         qlt_unmap_sg(vha, cmd);
3387
3388         if (unlikely(status != CTIO_SUCCESS)) {
3389                 switch (status & 0xFFFF) {
3390                 case CTIO_LIP_RESET:
3391                 case CTIO_TARGET_RESET:
3392                 case CTIO_ABORTED:
3393                         /* driver request abort via Terminate exchange */
3394                 case CTIO_TIMEOUT:
3395                 case CTIO_INVALID_RX_ID:
3396                         /* They are OK */
3397                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3398                             "qla_target(%d): CTIO with "
3399                             "status %#x received, state %x, se_cmd %p, "
3400                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3401                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3402                             status, cmd->state, se_cmd);
3403                         break;
3404
3405                 case CTIO_PORT_LOGGED_OUT:
3406                 case CTIO_PORT_UNAVAILABLE:
3407                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3408                             "qla_target(%d): CTIO with PORT LOGGED "
3409                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
3410                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3411                             status, cmd->state, se_cmd);
3412                         break;
3413
3414                 case CTIO_SRR_RECEIVED:
3415                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3416                             "qla_target(%d): CTIO with SRR_RECEIVED"
3417                             " status %x received (state %x, se_cmd %p)\n",
3418                             vha->vp_idx, status, cmd->state, se_cmd);
3419                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3420                                 break;
3421                         else
3422                                 return;
3423
3424                 case CTIO_DIF_ERROR: {
3425                         struct ctio_crc_from_fw *crc =
3426                                 (struct ctio_crc_from_fw *)ctio;
3427                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3428                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3429                             vha->vp_idx, status, cmd->state, se_cmd,
3430                             *((u64 *)&crc->actual_dif[0]),
3431                             *((u64 *)&crc->expected_dif[0]));
3432
3433                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3434                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3435                                         /* scsi Write/xfer rdy complete */
3436                                         goto skip_term;
3437                                 } else {
3438                                         /* scsi read/xmit respond complete
3439                                          * call handle dif to send scsi status
3440                                          * rather than terminate exchange.
3441                                          */
3442                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3443                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3444                                         return;
3445                                 }
3446                         } else {
3447                                 /* Need to generate a SCSI good completion.
3448                                  * because FW did not send scsi status.
3449                                  */
3450                                 status = 0;
3451                                 goto skip_term;
3452                         }
3453                         break;
3454                 }
3455                 default:
3456                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3457                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3458                             vha->vp_idx, status, cmd->state, se_cmd);
3459                         break;
3460                 }
3461
3462
3463                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3464                  * cmd is already aborted/terminated, we don't
3465                  * need to terminate again.  The exchange is already
3466                  * cleaned up/freed at FW level.  Just cleanup at driver
3467                  * level.
3468                  */
3469                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3470                     (cmd->state != QLA_TGT_STATE_ABORTED)) {
3471                         cmd->cmd_flags |= BIT_13;
3472                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3473                                 return;
3474                 }
3475         }
3476 skip_term:
3477
3478         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3479                 cmd->cmd_flags |= BIT_12;
3480         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3481                 cmd->state = QLA_TGT_STATE_DATA_IN;
3482
3483                 if (status == CTIO_SUCCESS)
3484                         cmd->write_data_transferred = 1;
3485
3486                 ha->tgt.tgt_ops->handle_data(cmd);
3487                 return;
3488         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3489                 cmd->cmd_flags |= BIT_18;
3490                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3491                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3492         } else {
3493                 cmd->cmd_flags |= BIT_19;
3494                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3495                     "qla_target(%d): A command in state (%d) should "
3496                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3497         }
3498
3499         if (unlikely(status != CTIO_SUCCESS) &&
3500                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3501                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3502                 dump_stack();
3503         }
3504
3505         ha->tgt.tgt_ops->free_cmd(cmd);
3506 }
3507
3508 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3509         uint8_t task_codes)
3510 {
3511         int fcp_task_attr;
3512
3513         switch (task_codes) {
3514         case ATIO_SIMPLE_QUEUE:
3515                 fcp_task_attr = TCM_SIMPLE_TAG;
3516                 break;
3517         case ATIO_HEAD_OF_QUEUE:
3518                 fcp_task_attr = TCM_HEAD_TAG;
3519                 break;
3520         case ATIO_ORDERED_QUEUE:
3521                 fcp_task_attr = TCM_ORDERED_TAG;
3522                 break;
3523         case ATIO_ACA_QUEUE:
3524                 fcp_task_attr = TCM_ACA_TAG;
3525                 break;
3526         case ATIO_UNTAGGED:
3527                 fcp_task_attr = TCM_SIMPLE_TAG;
3528                 break;
3529         default:
3530                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3531                     "qla_target: unknown task code %x, use ORDERED instead\n",
3532                     task_codes);
3533                 fcp_task_attr = TCM_ORDERED_TAG;
3534                 break;
3535         }
3536
3537         return fcp_task_attr;
3538 }
3539
3540 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3541                                         uint8_t *);
3542 /*
3543  * Process context for I/O path into tcm_qla2xxx code
3544  */
3545 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3546 {
3547         scsi_qla_host_t *vha = cmd->vha;
3548         struct qla_hw_data *ha = vha->hw;
3549         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3550         struct qla_tgt_sess *sess = cmd->sess;
3551         struct atio_from_isp *atio = &cmd->atio;
3552         unsigned char *cdb;
3553         unsigned long flags;
3554         uint32_t data_length;
3555         int ret, fcp_task_attr, data_dir, bidi = 0;
3556
3557         cmd->cmd_in_wq = 0;
3558         cmd->cmd_flags |= BIT_1;
3559         if (tgt->tgt_stop)
3560                 goto out_term;
3561
3562         if (cmd->state == QLA_TGT_STATE_ABORTED) {
3563                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3564                     "cmd with tag %u is aborted\n",
3565                     cmd->atio.u.isp24.exchange_addr);
3566                 goto out_term;
3567         }
3568
3569         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3570         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3571         cmd->unpacked_lun = scsilun_to_int(
3572             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3573
3574         if (atio->u.isp24.fcp_cmnd.rddata &&
3575             atio->u.isp24.fcp_cmnd.wrdata) {
3576                 bidi = 1;
3577                 data_dir = DMA_TO_DEVICE;
3578         } else if (atio->u.isp24.fcp_cmnd.rddata)
3579                 data_dir = DMA_FROM_DEVICE;
3580         else if (atio->u.isp24.fcp_cmnd.wrdata)
3581                 data_dir = DMA_TO_DEVICE;
3582         else
3583                 data_dir = DMA_NONE;
3584
3585         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3586             atio->u.isp24.fcp_cmnd.task_attr);
3587         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3588             &atio->u.isp24.fcp_cmnd.add_cdb[
3589             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3590
3591         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3592                                           fcp_task_attr, data_dir, bidi);
3593         if (ret != 0)
3594                 goto out_term;
3595         /*
3596          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3597          */
3598         spin_lock_irqsave(&ha->hardware_lock, flags);
3599         ha->tgt.tgt_ops->put_sess(sess);
3600         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3601         return;
3602
3603 out_term:
3604         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3605         /*
3606          * cmd has not sent to target yet, so pass NULL as the second
3607          * argument to qlt_send_term_exchange() and free the memory here.
3608          */
3609         cmd->cmd_flags |= BIT_2;
3610         spin_lock_irqsave(&ha->hardware_lock, flags);
3611         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3612
3613         qlt_decr_num_pend_cmds(vha);
3614         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3615         ha->tgt.tgt_ops->put_sess(sess);
3616         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3617 }
3618
3619 static void qlt_do_work(struct work_struct *work)
3620 {
3621         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3622         scsi_qla_host_t *vha = cmd->vha;
3623         unsigned long flags;
3624
3625         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3626         list_del(&cmd->cmd_list);
3627         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3628
3629         __qlt_do_work(cmd);
3630 }
3631
3632 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3633                                        struct qla_tgt_sess *sess,
3634                                        struct atio_from_isp *atio)
3635 {
3636         struct se_session *se_sess = sess->se_sess;
3637         struct qla_tgt_cmd *cmd;
3638         int tag;
3639
3640         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3641         if (tag < 0)
3642                 return NULL;
3643
3644         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3645         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3646
3647         memcpy(&cmd->atio, atio, sizeof(*atio));
3648         cmd->state = QLA_TGT_STATE_NEW;
3649         cmd->tgt = vha->vha_tgt.qla_tgt;
3650         qlt_incr_num_pend_cmds(vha);
3651         cmd->vha = vha;
3652         cmd->se_cmd.map_tag = tag;
3653         cmd->sess = sess;
3654         cmd->loop_id = sess->loop_id;
3655         cmd->conf_compl_supported = sess->conf_compl_supported;
3656
3657         cmd->cmd_flags = 0;
3658         cmd->jiffies_at_alloc = get_jiffies_64();
3659
3660         cmd->reset_count = vha->hw->chip_reset;
3661
3662         return cmd;
3663 }
3664
3665 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3666                           uint16_t);
3667
3668 static void qlt_create_sess_from_atio(struct work_struct *work)
3669 {
3670         struct qla_tgt_sess_op *op = container_of(work,
3671                                         struct qla_tgt_sess_op, work);
3672         scsi_qla_host_t *vha = op->vha;
3673         struct qla_hw_data *ha = vha->hw;
3674         struct qla_tgt_sess *sess;
3675         struct qla_tgt_cmd *cmd;
3676         unsigned long flags;
3677         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3678
3679         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3680         list_del(&op->cmd_list);
3681         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3682
3683         if (op->aborted) {
3684                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3685                     "sess_op with tag %u is aborted\n",
3686                     op->atio.u.isp24.exchange_addr);
3687                 goto out_term;
3688         }
3689
3690         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3691             "qla_target(%d): Unable to find wwn login"
3692             " (s_id %x:%x:%x), trying to create it manually\n",
3693             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3694
3695         if (op->atio.u.raw.entry_count > 1) {
3696                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3697                     "Dropping multy entry atio %p\n", &op->atio);
3698                 goto out_term;
3699         }
3700
3701         mutex_lock(&vha->vha_tgt.tgt_mutex);
3702         sess = qlt_make_local_sess(vha, s_id);
3703         /* sess has an extra creation ref. */
3704         mutex_unlock(&vha->vha_tgt.tgt_mutex);
3705
3706         if (!sess)
3707                 goto out_term;
3708         /*
3709          * Now obtain a pre-allocated session tag using the original op->atio
3710          * packet header, and dispatch into __qlt_do_work() using the existing
3711          * process context.
3712          */
3713         cmd = qlt_get_tag(vha, sess, &op->atio);
3714         if (!cmd) {
3715                 spin_lock_irqsave(&ha->hardware_lock, flags);
3716                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3717                 ha->tgt.tgt_ops->put_sess(sess);
3718                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3719                 kfree(op);
3720                 return;
3721         }
3722         /*
3723          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3724          * the extra reference taken above by qlt_make_local_sess()
3725          */
3726         __qlt_do_work(cmd);
3727         kfree(op);
3728         return;
3729
3730 out_term:
3731         spin_lock_irqsave(&ha->hardware_lock, flags);
3732         qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3733         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3734         kfree(op);
3735
3736 }
3737
3738 /* ha->hardware_lock supposed to be held on entry */
3739 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3740         struct atio_from_isp *atio)
3741 {
3742         struct qla_hw_data *ha = vha->hw;
3743         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3744         struct qla_tgt_sess *sess;
3745         struct qla_tgt_cmd *cmd;
3746
3747         if (unlikely(tgt->tgt_stop)) {
3748                 ql_dbg(ql_dbg_io, vha, 0x3061,
3749                     "New command while device %p is shutting down\n", tgt);
3750                 return -EFAULT;
3751         }
3752
3753         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3754         if (unlikely(!sess)) {
3755                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3756                                                      GFP_ATOMIC);
3757                 if (!op)
3758                         return -ENOMEM;
3759
3760                 memcpy(&op->atio, atio, sizeof(*atio));
3761                 op->vha = vha;
3762
3763                 spin_lock(&vha->cmd_list_lock);
3764                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3765                 spin_unlock(&vha->cmd_list_lock);
3766
3767                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3768                 queue_work(qla_tgt_wq, &op->work);
3769                 return 0;
3770         }
3771
3772         /* Another WWN used to have our s_id. Our PLOGI scheduled its
3773          * session deletion, but it's still in sess_del_work wq */
3774         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
3775                 ql_dbg(ql_dbg_io, vha, 0x3061,
3776                     "New command while old session %p is being deleted\n",
3777                     sess);
3778                 return -EFAULT;
3779         }
3780
3781         /*
3782          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3783          */
3784         kref_get(&sess->se_sess->sess_kref);
3785
3786         cmd = qlt_get_tag(vha, sess, atio);
3787         if (!cmd) {
3788                 ql_dbg(ql_dbg_io, vha, 0x3062,
3789                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3790                 ha->tgt.tgt_ops->put_sess(sess);
3791                 return -ENOMEM;
3792         }
3793
3794         cmd->cmd_in_wq = 1;
3795         cmd->cmd_flags |= BIT_0;
3796
3797         spin_lock(&vha->cmd_list_lock);
3798         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
3799         spin_unlock(&vha->cmd_list_lock);
3800
3801         INIT_WORK(&cmd->work, qlt_do_work);
3802         queue_work(qla_tgt_wq, &cmd->work);
3803         return 0;
3804
3805 }
3806
3807 /* ha->hardware_lock supposed to be held on entry */
3808 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3809         int fn, void *iocb, int flags)
3810 {
3811         struct scsi_qla_host *vha = sess->vha;
3812         struct qla_hw_data *ha = vha->hw;
3813         struct qla_tgt_mgmt_cmd *mcmd;
3814         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3815         int res;
3816         uint8_t tmr_func;
3817
3818         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3819         if (!mcmd) {
3820                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3821                     "qla_target(%d): Allocation of management "
3822                     "command failed, some commands and their data could "
3823                     "leak\n", vha->vp_idx);
3824                 return -ENOMEM;
3825         }
3826         memset(mcmd, 0, sizeof(*mcmd));
3827         mcmd->sess = sess;
3828
3829         if (iocb) {
3830                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3831                     sizeof(mcmd->orig_iocb.imm_ntfy));
3832         }
3833         mcmd->tmr_func = fn;
3834         mcmd->flags = flags;
3835         mcmd->reset_count = vha->hw->chip_reset;
3836
3837         switch (fn) {
3838         case QLA_TGT_CLEAR_ACA:
3839                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3840                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3841                 tmr_func = TMR_CLEAR_ACA;
3842                 break;
3843
3844         case QLA_TGT_TARGET_RESET:
3845                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3846                     "qla_target(%d): TARGET_RESET received\n",
3847                     sess->vha->vp_idx);
3848                 tmr_func = TMR_TARGET_WARM_RESET;
3849                 break;
3850
3851         case QLA_TGT_LUN_RESET:
3852                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3853                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3854                 tmr_func = TMR_LUN_RESET;
3855                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
3856                 break;
3857
3858         case QLA_TGT_CLEAR_TS:
3859                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3860                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3861                 tmr_func = TMR_CLEAR_TASK_SET;
3862                 break;
3863
3864         case QLA_TGT_ABORT_TS:
3865                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3866                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3867                 tmr_func = TMR_ABORT_TASK_SET;
3868                 break;
3869 #if 0
3870         case QLA_TGT_ABORT_ALL:
3871                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3872                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3873                     sess->vha->vp_idx);
3874                 tmr_func = 0;
3875                 break;
3876
3877         case QLA_TGT_ABORT_ALL_SESS:
3878                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3879                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3880                     sess->vha->vp_idx);
3881                 tmr_func = 0;
3882                 break;
3883
3884         case QLA_TGT_NEXUS_LOSS_SESS:
3885                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3886                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3887                     sess->vha->vp_idx);
3888                 tmr_func = 0;
3889                 break;
3890
3891         case QLA_TGT_NEXUS_LOSS:
3892                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3893                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3894                 tmr_func = 0;
3895                 break;
3896 #endif
3897         default:
3898                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3899                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3900                     sess->vha->vp_idx, fn);
3901                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3902                 return -ENOSYS;
3903         }
3904
3905         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3906         if (res != 0) {
3907                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3908                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3909                     sess->vha->vp_idx, res);
3910                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3911                 return -EFAULT;
3912         }
3913
3914         return 0;
3915 }
3916
3917 /* ha->hardware_lock supposed to be held on entry */
3918 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3919 {
3920         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3921         struct qla_hw_data *ha = vha->hw;
3922         struct qla_tgt *tgt;
3923         struct qla_tgt_sess *sess;
3924         uint32_t lun, unpacked_lun;
3925         int fn;
3926
3927         tgt = vha->vha_tgt.qla_tgt;
3928
3929         lun = a->u.isp24.fcp_cmnd.lun;
3930         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3931         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3932             a->u.isp24.fcp_hdr.s_id);
3933         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3934
3935         if (!sess) {
3936                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3937                     "qla_target(%d): task mgmt fn 0x%x for "
3938                     "non-existant session\n", vha->vp_idx, fn);
3939                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3940                     sizeof(struct atio_from_isp));
3941         }
3942
3943         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
3944                 return -EFAULT;
3945
3946         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3947 }
3948
3949 /* ha->hardware_lock supposed to be held on entry */
3950 static int __qlt_abort_task(struct scsi_qla_host *vha,
3951         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3952 {
3953         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3954         struct qla_hw_data *ha = vha->hw;
3955         struct qla_tgt_mgmt_cmd *mcmd;
3956         uint32_t lun, unpacked_lun;
3957         int rc;
3958
3959         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3960         if (mcmd == NULL) {
3961                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3962                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3963                     vha->vp_idx, __func__);
3964                 return -ENOMEM;
3965         }
3966         memset(mcmd, 0, sizeof(*mcmd));
3967
3968         mcmd->sess = sess;
3969         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3970             sizeof(mcmd->orig_iocb.imm_ntfy));
3971
3972         lun = a->u.isp24.fcp_cmnd.lun;
3973         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3974         mcmd->reset_count = vha->hw->chip_reset;
3975
3976         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3977             le16_to_cpu(iocb->u.isp2x.seq_id));
3978         if (rc != 0) {
3979                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3980                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3981                     vha->vp_idx, rc);
3982                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3983                 return -EFAULT;
3984         }
3985
3986         return 0;
3987 }
3988
3989 /* ha->hardware_lock supposed to be held on entry */
3990 static int qlt_abort_task(struct scsi_qla_host *vha,
3991         struct imm_ntfy_from_isp *iocb)
3992 {
3993         struct qla_hw_data *ha = vha->hw;
3994         struct qla_tgt_sess *sess;
3995         int loop_id;
3996
3997         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3998
3999         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4000         if (sess == NULL) {
4001                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4002                     "qla_target(%d): task abort for unexisting "
4003                     "session\n", vha->vp_idx);
4004                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4005                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4006         }
4007
4008         return __qlt_abort_task(vha, iocb, sess);
4009 }
4010
4011 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4012 {
4013         if (fcport->tgt_session) {
4014                 if (rc != MBS_COMMAND_COMPLETE) {
4015                         ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4016                                 "%s: se_sess %p / sess %p from"
4017                                 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4018                                 " LOGO failed: %#x\n",
4019                                 __func__,
4020                                 fcport->tgt_session->se_sess,
4021                                 fcport->tgt_session,
4022                                 fcport->port_name, fcport->loop_id,
4023                                 fcport->d_id.b.domain, fcport->d_id.b.area,
4024                                 fcport->d_id.b.al_pa, rc);
4025                 }
4026
4027                 fcport->tgt_session->logout_completed = 1;
4028         }
4029 }
4030
4031 static void qlt_swap_imm_ntfy_iocb(struct imm_ntfy_from_isp *a,
4032     struct imm_ntfy_from_isp *b)
4033 {
4034         struct imm_ntfy_from_isp tmp;
4035         memcpy(&tmp, a, sizeof(struct imm_ntfy_from_isp));
4036         memcpy(a, b, sizeof(struct imm_ntfy_from_isp));
4037         memcpy(b, &tmp, sizeof(struct imm_ntfy_from_isp));
4038 }
4039
4040 /*
4041 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4042 *
4043 * Schedules sessions with matching port_id/loop_id but different wwn for
4044 * deletion. Returns existing session with matching wwn if present.
4045 * Null otherwise.
4046 */
4047 static struct qla_tgt_sess *
4048 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4049     port_id_t port_id, uint16_t loop_id)
4050 {
4051         struct qla_tgt_sess *sess = NULL, *other_sess;
4052         uint64_t other_wwn;
4053
4054         list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4055
4056                 other_wwn = wwn_to_u64(other_sess->port_name);
4057
4058                 if (wwn == other_wwn) {
4059                         WARN_ON(sess);
4060                         sess = other_sess;
4061                         continue;
4062                 }
4063
4064                 /* find other sess with nport_id collision */
4065                 if (port_id.b24 == other_sess->s_id.b24) {
4066                         if (loop_id != other_sess->loop_id) {
4067                                 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4068                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4069                                     other_sess, other_sess->loop_id, other_wwn);
4070
4071                                 /*
4072                                  * logout_on_delete is set by default, but another
4073                                  * session that has the same s_id/loop_id combo
4074                                  * might have cleared it when requested this session
4075                                  * deletion, so don't touch it
4076                                  */
4077                                 qlt_schedule_sess_for_deletion(other_sess, true);
4078                         } else {
4079                                 /*
4080                                  * Another wwn used to have our s_id/loop_id
4081                                  * combo - kill the session, but don't log out
4082                                  */
4083                                 sess->logout_on_delete = 0;
4084                                 qlt_schedule_sess_for_deletion(other_sess,
4085                                     true);
4086                         }
4087                         continue;
4088                 }
4089
4090                 /* find other sess with nport handle collision */
4091                 if (loop_id == other_sess->loop_id) {
4092                         ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4093                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4094                                other_sess, other_sess->loop_id, other_wwn);
4095
4096                         /* Same loop_id but different s_id
4097                          * Ok to kill and logout */
4098                         qlt_schedule_sess_for_deletion(other_sess, true);
4099                 }
4100         }
4101
4102         return sess;
4103 }
4104
4105 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4106 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4107 {
4108         struct qla_tgt_sess_op *op;
4109         struct qla_tgt_cmd *cmd;
4110         uint32_t key;
4111         int count = 0;
4112
4113         key = (((u32)s_id->b.domain << 16) |
4114                ((u32)s_id->b.area   <<  8) |
4115                ((u32)s_id->b.al_pa));
4116
4117         spin_lock(&vha->cmd_list_lock);
4118         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4119                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4120                 if (op_key == key) {
4121                         op->aborted = true;
4122                         count++;
4123                 }
4124         }
4125         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4126                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4127                 if (cmd_key == key) {
4128                         cmd->state = QLA_TGT_STATE_ABORTED;
4129                         count++;
4130                 }
4131         }
4132         spin_unlock(&vha->cmd_list_lock);
4133
4134         return count;
4135 }
4136
4137 /*
4138  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4139  */
4140 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4141         struct imm_ntfy_from_isp *iocb)
4142 {
4143         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4144         struct qla_hw_data *ha = vha->hw;
4145         struct qla_tgt_sess *sess = NULL;
4146         uint64_t wwn;
4147         port_id_t port_id;
4148         uint16_t loop_id;
4149         uint16_t wd3_lo;
4150         int res = 0;
4151
4152         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4153
4154         port_id.b.domain = iocb->u.isp24.port_id[2];
4155         port_id.b.area   = iocb->u.isp24.port_id[1];
4156         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4157         port_id.b.rsvd_1 = 0;
4158
4159         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4160
4161         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4162             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4163             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4164
4165         /* res = 1 means ack at the end of thread
4166          * res = 0 means ack async/later.
4167          */
4168         switch (iocb->u.isp24.status_subcode) {
4169         case ELS_PLOGI:
4170
4171                 /* Mark all stale commands in qla_tgt_wq for deletion */
4172                 abort_cmds_for_s_id(vha, &port_id);
4173
4174                 if (wwn)
4175                         sess = qlt_find_sess_invalidate_other(tgt, wwn,
4176                             port_id, loop_id);
4177
4178                 if (!sess || IS_SW_RESV_ADDR(sess->s_id)) {
4179                         res = 1;
4180                         break;
4181                 }
4182
4183                 if (sess->plogi_ack_needed) {
4184                         /*
4185                          * Initiator sent another PLOGI before last PLOGI could
4186                          * finish. Swap plogi iocbs and terminate old one
4187                          * without acking, new one will get acked when session
4188                          * deletion completes.
4189                          */
4190                         ql_log(ql_log_warn, sess->vha, 0xf094,
4191                             "sess %p received double plogi.\n", sess);
4192
4193                         qlt_swap_imm_ntfy_iocb(iocb, &sess->tm_iocb);
4194
4195                         qlt_send_term_imm_notif(vha, iocb, 1);
4196
4197                         res = 0;
4198                         break;
4199                 }
4200
4201                 res = 0;
4202
4203                 /*
4204                  * Save immediate Notif IOCB for Ack when sess is done
4205                  * and being deleted.
4206                  */
4207                 memcpy(&sess->tm_iocb, iocb, sizeof(sess->tm_iocb));
4208                 sess->plogi_ack_needed  = 1;
4209
4210                  /*
4211                   * Under normal circumstances we want to release nport handle
4212                   * during LOGO process to avoid nport handle leaks inside FW.
4213                   * The exception is when LOGO is done while another PLOGI with
4214                   * the same nport handle is waiting as might be the case here.
4215                   * Note: there is always a possibily of a race where session
4216                   * deletion has already started for other reasons (e.g. ACL
4217                   * removal) and now PLOGI arrives:
4218                   * 1. if PLOGI arrived in FW after nport handle has been freed,
4219                   *    FW must have assigned this PLOGI a new/same handle and we
4220                   *    can proceed ACK'ing it as usual when session deletion
4221                   *    completes.
4222                   * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4223                   *    bit reached it, the handle has now been released. We'll
4224                   *    get an error when we ACK this PLOGI. Nothing will be sent
4225                   *    back to initiator. Initiator should eventually retry
4226                   *    PLOGI and situation will correct itself.
4227                   */
4228                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4229                                            (sess->s_id.b24 == port_id.b24));
4230                 qlt_schedule_sess_for_deletion(sess, true);
4231                 break;
4232
4233         case ELS_PRLI:
4234                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4235
4236                 if (wwn)
4237                         sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4238                             loop_id);
4239
4240                 if (sess != NULL) {
4241                         if (sess->deleted) {
4242                                 /*
4243                                  * Impatient initiator sent PRLI before last
4244                                  * PLOGI could finish. Will force him to re-try,
4245                                  * while last one finishes.
4246                                  */
4247                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4248                                     "sess %p PRLI received, before plogi ack.\n",
4249                                     sess);
4250                                 qlt_send_term_imm_notif(vha, iocb, 1);
4251                                 res = 0;
4252                                 break;
4253                         }
4254
4255                         /*
4256                          * This shouldn't happen under normal circumstances,
4257                          * since we have deleted the old session during PLOGI
4258                          */
4259                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4260                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4261                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4262
4263                         sess->local = 0;
4264                         sess->loop_id = loop_id;
4265                         sess->s_id = port_id;
4266
4267                         if (wd3_lo & BIT_7)
4268                                 sess->conf_compl_supported = 1;
4269
4270                 }
4271                 res = 1; /* send notify ack */
4272
4273                 /* Make session global (not used in fabric mode) */
4274                 if (ha->current_topology != ISP_CFG_F) {
4275                         set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4276                         set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4277                         qla2xxx_wake_dpc(vha);
4278                 } else {
4279                         /* todo: else - create sess here. */
4280                         res = 1; /* send notify ack */
4281                 }
4282
4283                 break;
4284
4285         case ELS_LOGO:
4286         case ELS_PRLO:
4287                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4288                 break;
4289         case ELS_PDISC:
4290         case ELS_ADISC:
4291         {
4292                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4293                 if (tgt->link_reinit_iocb_pending) {
4294                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4295                             0, 0, 0, 0, 0, 0);
4296                         tgt->link_reinit_iocb_pending = 0;
4297                 }
4298                 res = 1; /* send notify ack */
4299                 break;
4300         }
4301
4302         case ELS_FLOGI: /* should never happen */
4303         default:
4304                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4305                     "qla_target(%d): Unsupported ELS command %x "
4306                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4307                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4308                 break;
4309         }
4310
4311         return res;
4312 }
4313
4314 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4315 {
4316 #if 1
4317         /*
4318          * FIXME: Reject non zero SRR relative offset until we can test
4319          * this code properly.
4320          */
4321         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4322         return -1;
4323 #else
4324         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4325         size_t first_offset = 0, rem_offset = offset, tmp = 0;
4326         int i, sg_srr_cnt, bufflen = 0;
4327
4328         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4329             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4330             "cmd->sg_cnt: %u, direction: %d\n",
4331             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4332
4333         if (!cmd->sg || !cmd->sg_cnt) {
4334                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4335                     "Missing cmd->sg or zero cmd->sg_cnt in"
4336                     " qla_tgt_set_data_offset\n");
4337                 return -EINVAL;
4338         }
4339         /*
4340          * Walk the current cmd->sg list until we locate the new sg_srr_start
4341          */
4342         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4343                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4344                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4345                     i, sg, sg_page(sg), sg->length, sg->offset);
4346
4347                 if ((sg->length + tmp) > offset) {
4348                         first_offset = rem_offset;
4349                         sg_srr_start = sg;
4350                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4351                             "Found matching sg[%d], using %p as sg_srr_start, "
4352                             "and using first_offset: %zu\n", i, sg,
4353                             first_offset);
4354                         break;
4355                 }
4356                 tmp += sg->length;
4357                 rem_offset -= sg->length;
4358         }
4359
4360         if (!sg_srr_start) {
4361                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4362                     "Unable to locate sg_srr_start for offset: %u\n", offset);
4363                 return -EINVAL;
4364         }
4365         sg_srr_cnt = (cmd->sg_cnt - i);
4366
4367         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4368         if (!sg_srr) {
4369                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4370                     "Unable to allocate sgp\n");
4371                 return -ENOMEM;
4372         }
4373         sg_init_table(sg_srr, sg_srr_cnt);
4374         sgp = &sg_srr[0];
4375         /*
4376          * Walk the remaining list for sg_srr_start, mapping to the newly
4377          * allocated sg_srr taking first_offset into account.
4378          */
4379         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4380                 if (first_offset) {
4381                         sg_set_page(sgp, sg_page(sg),
4382                             (sg->length - first_offset), first_offset);
4383                         first_offset = 0;
4384                 } else {
4385                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
4386                 }
4387                 bufflen += sgp->length;
4388
4389                 sgp = sg_next(sgp);
4390                 if (!sgp)
4391                         break;
4392         }
4393
4394         cmd->sg = sg_srr;
4395         cmd->sg_cnt = sg_srr_cnt;
4396         cmd->bufflen = bufflen;
4397         cmd->offset += offset;
4398         cmd->free_sg = 1;
4399
4400         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4401         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4402             cmd->sg_cnt);
4403         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4404             cmd->bufflen);
4405         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4406             cmd->offset);
4407
4408         if (cmd->sg_cnt < 0)
4409                 BUG();
4410
4411         if (cmd->bufflen < 0)
4412                 BUG();
4413
4414         return 0;
4415 #endif
4416 }
4417
4418 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4419         uint32_t srr_rel_offs, int *xmit_type)
4420 {
4421         int res = 0, rel_offs;
4422
4423         rel_offs = srr_rel_offs - cmd->offset;
4424         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4425             srr_rel_offs, rel_offs);
4426
4427         *xmit_type = QLA_TGT_XMIT_ALL;
4428
4429         if (rel_offs < 0) {
4430                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4431                     "qla_target(%d): SRR rel_offs (%d) < 0",
4432                     cmd->vha->vp_idx, rel_offs);
4433                 res = -1;
4434         } else if (rel_offs == cmd->bufflen)
4435                 *xmit_type = QLA_TGT_XMIT_STATUS;
4436         else if (rel_offs > 0)
4437                 res = qlt_set_data_offset(cmd, rel_offs);
4438
4439         return res;
4440 }
4441
4442 /* No locks, thread context */
4443 static void qlt_handle_srr(struct scsi_qla_host *vha,
4444         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4445 {
4446         struct imm_ntfy_from_isp *ntfy =
4447             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4448         struct qla_hw_data *ha = vha->hw;
4449         struct qla_tgt_cmd *cmd = sctio->cmd;
4450         struct se_cmd *se_cmd = &cmd->se_cmd;
4451         unsigned long flags;
4452         int xmit_type = 0, resp = 0;
4453         uint32_t offset;
4454         uint16_t srr_ui;
4455
4456         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4457         srr_ui = ntfy->u.isp24.srr_ui;
4458
4459         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4460             cmd, srr_ui);
4461
4462         switch (srr_ui) {
4463         case SRR_IU_STATUS:
4464                 spin_lock_irqsave(&ha->hardware_lock, flags);
4465                 qlt_send_notify_ack(vha, ntfy,
4466                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4467                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4468                 xmit_type = QLA_TGT_XMIT_STATUS;
4469                 resp = 1;
4470                 break;
4471         case SRR_IU_DATA_IN:
4472                 if (!cmd->sg || !cmd->sg_cnt) {
4473                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4474                             "Unable to process SRR_IU_DATA_IN due to"
4475                             " missing cmd->sg, state: %d\n", cmd->state);
4476                         dump_stack();
4477                         goto out_reject;
4478                 }
4479                 if (se_cmd->scsi_status != 0) {
4480                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4481                             "Rejecting SRR_IU_DATA_IN with non GOOD "
4482                             "scsi_status\n");
4483                         goto out_reject;
4484                 }
4485                 cmd->bufflen = se_cmd->data_length;
4486
4487                 if (qlt_has_data(cmd)) {
4488                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4489                                 goto out_reject;
4490                         spin_lock_irqsave(&ha->hardware_lock, flags);
4491                         qlt_send_notify_ack(vha, ntfy,
4492                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4493                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4494                         resp = 1;
4495                 } else {
4496                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4497                                "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4498                                vha->vp_idx, se_cmd->tag,
4499                             cmd->se_cmd.scsi_status);
4500                         goto out_reject;
4501                 }
4502                 break;
4503         case SRR_IU_DATA_OUT:
4504                 if (!cmd->sg || !cmd->sg_cnt) {
4505                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4506                             "Unable to process SRR_IU_DATA_OUT due to"
4507                             " missing cmd->sg\n");
4508                         dump_stack();
4509                         goto out_reject;
4510                 }
4511                 if (se_cmd->scsi_status != 0) {
4512                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4513                             "Rejecting SRR_IU_DATA_OUT"
4514                             " with non GOOD scsi_status\n");
4515                         goto out_reject;
4516                 }
4517                 cmd->bufflen = se_cmd->data_length;
4518
4519                 if (qlt_has_data(cmd)) {
4520                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4521                                 goto out_reject;
4522                         spin_lock_irqsave(&ha->hardware_lock, flags);
4523                         qlt_send_notify_ack(vha, ntfy,
4524                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4525                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4526                         if (xmit_type & QLA_TGT_XMIT_DATA) {
4527                                 cmd->cmd_flags |= BIT_8;
4528                                 qlt_rdy_to_xfer(cmd);
4529                         }
4530                 } else {
4531                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4532                             "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4533                                vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4534                         goto out_reject;
4535                 }
4536                 break;
4537         default:
4538                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4539                     "qla_target(%d): Unknown srr_ui value %x",
4540                     vha->vp_idx, srr_ui);
4541                 goto out_reject;
4542         }
4543
4544         /* Transmit response in case of status and data-in cases */
4545         if (resp) {
4546                 cmd->cmd_flags |= BIT_7;
4547                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4548         }
4549
4550         return;
4551
4552 out_reject:
4553         spin_lock_irqsave(&ha->hardware_lock, flags);
4554         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4555             NOTIFY_ACK_SRR_FLAGS_REJECT,
4556             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4557             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4558         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4559                 cmd->state = QLA_TGT_STATE_DATA_IN;
4560                 dump_stack();
4561         } else {
4562                 cmd->cmd_flags |= BIT_9;
4563                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
4564         }
4565         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4566 }
4567
4568 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4569         struct qla_tgt_srr_imm *imm, int ha_locked)
4570 {
4571         struct qla_hw_data *ha = vha->hw;
4572         unsigned long flags = 0;
4573
4574 #ifndef __CHECKER__
4575         if (!ha_locked)
4576                 spin_lock_irqsave(&ha->hardware_lock, flags);
4577 #endif
4578
4579         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4580             NOTIFY_ACK_SRR_FLAGS_REJECT,
4581             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4582             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4583
4584 #ifndef __CHECKER__
4585         if (!ha_locked)
4586                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4587 #endif
4588
4589         kfree(imm);
4590 }
4591
4592 static void qlt_handle_srr_work(struct work_struct *work)
4593 {
4594         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4595         struct scsi_qla_host *vha = tgt->vha;
4596         struct qla_tgt_srr_ctio *sctio;
4597         unsigned long flags;
4598
4599         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4600             tgt);
4601
4602 restart:
4603         spin_lock_irqsave(&tgt->srr_lock, flags);
4604         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4605                 struct qla_tgt_srr_imm *imm, *i, *ti;
4606                 struct qla_tgt_cmd *cmd;
4607                 struct se_cmd *se_cmd;
4608
4609                 imm = NULL;
4610                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4611                                                 srr_list_entry) {
4612                         if (i->srr_id == sctio->srr_id) {
4613                                 list_del(&i->srr_list_entry);
4614                                 if (imm) {
4615                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4616                                           "qla_target(%d): There must be "
4617                                           "only one IMM SRR per CTIO SRR "
4618                                           "(IMM SRR %p, id %d, CTIO %p\n",
4619                                           vha->vp_idx, i, i->srr_id, sctio);
4620                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4621                                 } else
4622                                         imm = i;
4623                         }
4624                 }
4625
4626                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4627                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4628                     sctio->srr_id);
4629
4630                 if (imm == NULL) {
4631                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4632                             "Not found matching IMM for SRR CTIO (id %d)\n",
4633                             sctio->srr_id);
4634                         continue;
4635                 } else
4636                         list_del(&sctio->srr_list_entry);
4637
4638                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4639
4640                 cmd = sctio->cmd;
4641                 /*
4642                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4643                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4644                  * logic..
4645                  */
4646                 cmd->offset = 0;
4647                 if (cmd->free_sg) {
4648                         kfree(cmd->sg);
4649                         cmd->sg = NULL;
4650                         cmd->free_sg = 0;
4651                 }
4652                 se_cmd = &cmd->se_cmd;
4653
4654                 cmd->sg_cnt = se_cmd->t_data_nents;
4655                 cmd->sg = se_cmd->t_data_sg;
4656
4657                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4658                        "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4659                        cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4660                        se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4661
4662                 qlt_handle_srr(vha, sctio, imm);
4663
4664                 kfree(imm);
4665                 kfree(sctio);
4666                 goto restart;
4667         }
4668         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4669 }
4670
4671 /* ha->hardware_lock supposed to be held on entry */
4672 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4673         struct imm_ntfy_from_isp *iocb)
4674 {
4675         struct qla_tgt_srr_imm *imm;
4676         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4677         struct qla_tgt_srr_ctio *sctio;
4678
4679         tgt->imm_srr_id++;
4680
4681         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4682             vha->vp_idx);
4683
4684         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4685         if (imm != NULL) {
4686                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4687
4688                 /* IRQ is already OFF */
4689                 spin_lock(&tgt->srr_lock);
4690                 imm->srr_id = tgt->imm_srr_id;
4691                 list_add_tail(&imm->srr_list_entry,
4692                     &tgt->srr_imm_list);
4693                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4694                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4695                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4696                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4697                         int found = 0;
4698                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4699                             srr_list_entry) {
4700                                 if (sctio->srr_id == imm->srr_id) {
4701                                         found = 1;
4702                                         break;
4703                                 }
4704                         }
4705                         if (found) {
4706                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4707                                     "Scheduling srr work\n");
4708                                 schedule_work(&tgt->srr_work);
4709                         } else {
4710                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4711                                     "qla_target(%d): imm_srr_id "
4712                                     "== ctio_srr_id (%d), but there is no "
4713                                     "corresponding SRR CTIO, deleting IMM "
4714                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4715                                     imm);
4716                                 list_del(&imm->srr_list_entry);
4717
4718                                 kfree(imm);
4719
4720                                 spin_unlock(&tgt->srr_lock);
4721                                 goto out_reject;
4722                         }
4723                 }
4724                 spin_unlock(&tgt->srr_lock);
4725         } else {
4726                 struct qla_tgt_srr_ctio *ts;
4727
4728                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4729                     "qla_target(%d): Unable to allocate SRR IMM "
4730                     "entry, SRR request will be rejected\n", vha->vp_idx);
4731
4732                 /* IRQ is already OFF */
4733                 spin_lock(&tgt->srr_lock);
4734                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4735                     srr_list_entry) {
4736                         if (sctio->srr_id == tgt->imm_srr_id) {
4737                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4738                                     "CTIO SRR %p deleted (id %d)\n",
4739                                     sctio, sctio->srr_id);
4740                                 list_del(&sctio->srr_list_entry);
4741                                 qlt_send_term_exchange(vha, sctio->cmd,
4742                                     &sctio->cmd->atio, 1);
4743                                 kfree(sctio);
4744                         }
4745                 }
4746                 spin_unlock(&tgt->srr_lock);
4747                 goto out_reject;
4748         }
4749
4750         return;
4751
4752 out_reject:
4753         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4754             NOTIFY_ACK_SRR_FLAGS_REJECT,
4755             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4756             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4757 }
4758
4759 /*
4760  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4761  */
4762 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4763         struct imm_ntfy_from_isp *iocb)
4764 {
4765         struct qla_hw_data *ha = vha->hw;
4766         uint32_t add_flags = 0;
4767         int send_notify_ack = 1;
4768         uint16_t status;
4769
4770         status = le16_to_cpu(iocb->u.isp2x.status);
4771         switch (status) {
4772         case IMM_NTFY_LIP_RESET:
4773         {
4774                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4775                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4776                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4777                     iocb->u.isp24.status_subcode);
4778
4779                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4780                         send_notify_ack = 0;
4781                 break;
4782         }
4783
4784         case IMM_NTFY_LIP_LINK_REINIT:
4785         {
4786                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4787                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4788                     "qla_target(%d): LINK REINIT (loop %#x, "
4789                     "subcode %x)\n", vha->vp_idx,
4790                     le16_to_cpu(iocb->u.isp24.nport_handle),
4791                     iocb->u.isp24.status_subcode);
4792                 if (tgt->link_reinit_iocb_pending) {
4793                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4794                             0, 0, 0, 0, 0, 0);
4795                 }
4796                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4797                 tgt->link_reinit_iocb_pending = 1;
4798                 /*
4799                  * QLogic requires to wait after LINK REINIT for possible
4800                  * PDISC or ADISC ELS commands
4801                  */
4802                 send_notify_ack = 0;
4803                 break;
4804         }
4805
4806         case IMM_NTFY_PORT_LOGOUT:
4807                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4808                     "qla_target(%d): Port logout (loop "
4809                     "%#x, subcode %x)\n", vha->vp_idx,
4810                     le16_to_cpu(iocb->u.isp24.nport_handle),
4811                     iocb->u.isp24.status_subcode);
4812
4813                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4814                         send_notify_ack = 0;
4815                 /* The sessions will be cleared in the callback, if needed */
4816                 break;
4817
4818         case IMM_NTFY_GLBL_TPRLO:
4819                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4820                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4821                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4822                         send_notify_ack = 0;
4823                 /* The sessions will be cleared in the callback, if needed */
4824                 break;
4825
4826         case IMM_NTFY_PORT_CONFIG:
4827                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4828                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4829                     status);
4830                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4831                         send_notify_ack = 0;
4832                 /* The sessions will be cleared in the callback, if needed */
4833                 break;
4834
4835         case IMM_NTFY_GLBL_LOGO:
4836                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4837                     "qla_target(%d): Link failure detected\n",
4838                     vha->vp_idx);
4839                 /* I_T nexus loss */
4840                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4841                         send_notify_ack = 0;
4842                 break;
4843
4844         case IMM_NTFY_IOCB_OVERFLOW:
4845                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4846                     "qla_target(%d): Cannot provide requested "
4847                     "capability (IOCB overflowed the immediate notify "
4848                     "resource count)\n", vha->vp_idx);
4849                 break;
4850
4851         case IMM_NTFY_ABORT_TASK:
4852                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4853                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4854                     "L %#x)\n", vha->vp_idx,
4855                     le16_to_cpu(iocb->u.isp2x.seq_id),
4856                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4857                     le16_to_cpu(iocb->u.isp2x.lun));
4858                 if (qlt_abort_task(vha, iocb) == 0)
4859                         send_notify_ack = 0;
4860                 break;
4861
4862         case IMM_NTFY_RESOURCE:
4863                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4864                     "qla_target(%d): Out of resources, host %ld\n",
4865                     vha->vp_idx, vha->host_no);
4866                 break;
4867
4868         case IMM_NTFY_MSG_RX:
4869                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4870                     "qla_target(%d): Immediate notify task %x\n",
4871                     vha->vp_idx, iocb->u.isp2x.task_flags);
4872                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4873                         send_notify_ack = 0;
4874                 break;
4875
4876         case IMM_NTFY_ELS:
4877                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4878                         send_notify_ack = 0;
4879                 break;
4880
4881         case IMM_NTFY_SRR:
4882                 qlt_prepare_srr_imm(vha, iocb);
4883                 send_notify_ack = 0;
4884                 break;
4885
4886         default:
4887                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4888                     "qla_target(%d): Received unknown immediate "
4889                     "notify status %x\n", vha->vp_idx, status);
4890                 break;
4891         }
4892
4893         if (send_notify_ack)
4894                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4895 }
4896
4897 /*
4898  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4899  * This function sends busy to ISP 2xxx or 24xx.
4900  */
4901 static int __qlt_send_busy(struct scsi_qla_host *vha,
4902         struct atio_from_isp *atio, uint16_t status)
4903 {
4904         struct ctio7_to_24xx *ctio24;
4905         struct qla_hw_data *ha = vha->hw;
4906         request_t *pkt;
4907         struct qla_tgt_sess *sess = NULL;
4908
4909         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4910             atio->u.isp24.fcp_hdr.s_id);
4911         if (!sess) {
4912                 qlt_send_term_exchange(vha, NULL, atio, 1);
4913                 return 0;
4914         }
4915         /* Sending marker isn't necessary, since we called from ISR */
4916
4917         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4918         if (!pkt) {
4919                 ql_dbg(ql_dbg_io, vha, 0x3063,
4920                     "qla_target(%d): %s failed: unable to allocate "
4921                     "request packet", vha->vp_idx, __func__);
4922                 return -ENOMEM;
4923         }
4924
4925         pkt->entry_count = 1;
4926         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4927
4928         ctio24 = (struct ctio7_to_24xx *)pkt;
4929         ctio24->entry_type = CTIO_TYPE7;
4930         ctio24->nport_handle = sess->loop_id;
4931         ctio24->timeout = cpu_to_le16(QLA_TGT_TIMEOUT);
4932         ctio24->vp_index = vha->vp_idx;
4933         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4934         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4935         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4936         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4937         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4938             cpu_to_le16(
4939                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4940                 CTIO7_FLAGS_DONT_RET_CTIO);
4941         /*
4942          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4943          * if the explicit conformation is used.
4944          */
4945         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4946         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4947         /* Memory Barrier */
4948         wmb();
4949         qla2x00_start_iocbs(vha, vha->req);
4950         return 0;
4951 }
4952
4953 /*
4954  * This routine is used to allocate a command for either a QFull condition
4955  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4956  * out previously.
4957  */
4958 static void
4959 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4960         struct atio_from_isp *atio, uint16_t status, int qfull)
4961 {
4962         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4963         struct qla_hw_data *ha = vha->hw;
4964         struct qla_tgt_sess *sess;
4965         struct se_session *se_sess;
4966         struct qla_tgt_cmd *cmd;
4967         int tag;
4968
4969         if (unlikely(tgt->tgt_stop)) {
4970                 ql_dbg(ql_dbg_io, vha, 0x300a,
4971                         "New command while device %p is shutting down\n", tgt);
4972                 return;
4973         }
4974
4975         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4976                 vha->hw->tgt.num_qfull_cmds_dropped++;
4977                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4978                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4979                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4980                                 vha->hw->tgt.num_qfull_cmds_dropped;
4981
4982                 ql_dbg(ql_dbg_io, vha, 0x3068,
4983                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4984                         vha->vp_idx, __func__,
4985                         vha->hw->tgt.num_qfull_cmds_dropped);
4986
4987                 qlt_chk_exch_leak_thresh_hold(vha);
4988                 return;
4989         }
4990
4991         sess = ha->tgt.tgt_ops->find_sess_by_s_id
4992                 (vha, atio->u.isp24.fcp_hdr.s_id);
4993         if (!sess)
4994                 return;
4995
4996         se_sess = sess->se_sess;
4997
4998         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4999         if (tag < 0)
5000                 return;
5001
5002         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5003         if (!cmd) {
5004                 ql_dbg(ql_dbg_io, vha, 0x3009,
5005                         "qla_target(%d): %s: Allocation of cmd failed\n",
5006                         vha->vp_idx, __func__);
5007
5008                 vha->hw->tgt.num_qfull_cmds_dropped++;
5009                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5010                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
5011                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
5012                                 vha->hw->tgt.num_qfull_cmds_dropped;
5013
5014                 qlt_chk_exch_leak_thresh_hold(vha);
5015                 return;
5016         }
5017
5018         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5019
5020         qlt_incr_num_pend_cmds(vha);
5021         INIT_LIST_HEAD(&cmd->cmd_list);
5022         memcpy(&cmd->atio, atio, sizeof(*atio));
5023
5024         cmd->tgt = vha->vha_tgt.qla_tgt;
5025         cmd->vha = vha;
5026         cmd->reset_count = vha->hw->chip_reset;
5027         cmd->q_full = 1;
5028
5029         if (qfull) {
5030                 cmd->q_full = 1;
5031                 /* NOTE: borrowing the state field to carry the status */
5032                 cmd->state = status;
5033         } else
5034                 cmd->term_exchg = 1;
5035
5036         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5037
5038         vha->hw->tgt.num_qfull_cmds_alloc++;
5039         if (vha->hw->tgt.num_qfull_cmds_alloc >
5040                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
5041                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
5042                         vha->hw->tgt.num_qfull_cmds_alloc;
5043 }
5044
5045 int
5046 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5047 {
5048         struct qla_hw_data *ha = vha->hw;
5049         unsigned long flags;
5050         struct qla_tgt_cmd *cmd, *tcmd;
5051         struct list_head free_list;
5052         int rc = 0;
5053
5054         if (list_empty(&ha->tgt.q_full_list))
5055                 return 0;
5056
5057         INIT_LIST_HEAD(&free_list);
5058
5059         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5060
5061         if (list_empty(&ha->tgt.q_full_list)) {
5062                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5063                 return 0;
5064         }
5065
5066         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5067                 if (cmd->q_full)
5068                         /* cmd->state is a borrowed field to hold status */
5069                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5070                 else if (cmd->term_exchg)
5071                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5072
5073                 if (rc == -ENOMEM)
5074                         break;
5075
5076                 if (cmd->q_full)
5077                         ql_dbg(ql_dbg_io, vha, 0x3006,
5078                             "%s: busy sent for ox_id[%04x]\n", __func__,
5079                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5080                 else if (cmd->term_exchg)
5081                         ql_dbg(ql_dbg_io, vha, 0x3007,
5082                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5083                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5084                 else
5085                         ql_dbg(ql_dbg_io, vha, 0x3008,
5086                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5087                             cmd);
5088
5089                 list_del(&cmd->cmd_list);
5090                 list_add_tail(&cmd->cmd_list, &free_list);
5091
5092                 /* piggy back on hardware_lock for protection */
5093                 vha->hw->tgt.num_qfull_cmds_alloc--;
5094         }
5095         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5096
5097         cmd = NULL;
5098
5099         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5100                 list_del(&cmd->cmd_list);
5101                 /* This cmd was never sent to TCM.  There is no need
5102                  * to schedule free or call free_cmd
5103                  */
5104                 qlt_free_cmd(cmd);
5105         }
5106         return rc;
5107 }
5108
5109 static void
5110 qlt_send_busy(struct scsi_qla_host *vha,
5111         struct atio_from_isp *atio, uint16_t status)
5112 {
5113         int rc = 0;
5114
5115         rc = __qlt_send_busy(vha, atio, status);
5116         if (rc == -ENOMEM)
5117                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5118 }
5119
5120 static int
5121 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5122         struct atio_from_isp *atio)
5123 {
5124         struct qla_hw_data *ha = vha->hw;
5125         uint16_t status;
5126
5127         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5128                 return 0;
5129
5130         status = temp_sam_status;
5131         qlt_send_busy(vha, atio, status);
5132         return 1;
5133 }
5134
5135 /* ha->hardware_lock supposed to be held on entry */
5136 /* called via callback from qla2xxx */
5137 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5138         struct atio_from_isp *atio)
5139 {
5140         struct qla_hw_data *ha = vha->hw;
5141         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5142         int rc;
5143
5144         if (unlikely(tgt == NULL)) {
5145                 ql_dbg(ql_dbg_io, vha, 0x3064,
5146                     "ATIO pkt, but no tgt (ha %p)", ha);
5147                 return;
5148         }
5149         /*
5150          * In tgt_stop mode we also should allow all requests to pass.
5151          * Otherwise, some commands can stuck.
5152          */
5153
5154         tgt->irq_cmd_count++;
5155
5156         switch (atio->u.raw.entry_type) {
5157         case ATIO_TYPE7:
5158                 if (unlikely(atio->u.isp24.exchange_addr ==
5159                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5160                         ql_dbg(ql_dbg_io, vha, 0x3065,
5161                             "qla_target(%d): ATIO_TYPE7 "
5162                             "received with UNKNOWN exchange address, "
5163                             "sending QUEUE_FULL\n", vha->vp_idx);
5164                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5165                         break;
5166                 }
5167
5168
5169
5170                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5171                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
5172                         if (rc != 0) {
5173                                 tgt->irq_cmd_count--;
5174                                 return;
5175                         }
5176                         rc = qlt_handle_cmd_for_atio(vha, atio);
5177                 } else {
5178                         rc = qlt_handle_task_mgmt(vha, atio);
5179                 }
5180                 if (unlikely(rc != 0)) {
5181                         if (rc == -ESRCH) {
5182 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5183                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5184 #else
5185                                 qlt_send_term_exchange(vha, NULL, atio, 1);
5186 #endif
5187                         } else {
5188                                 if (tgt->tgt_stop) {
5189                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5190                                             "qla_target: Unable to send "
5191                                             "command to target for req, "
5192                                             "ignoring.\n");
5193                                 } else {
5194                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5195                                             "qla_target(%d): Unable to send "
5196                                             "command to target, sending BUSY "
5197                                             "status.\n", vha->vp_idx);
5198                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5199                                 }
5200                         }
5201                 }
5202                 break;
5203
5204         case IMMED_NOTIFY_TYPE:
5205         {
5206                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5207                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5208                             "qla_target(%d): Received ATIO packet %x "
5209                             "with error status %x\n", vha->vp_idx,
5210                             atio->u.raw.entry_type,
5211                             atio->u.isp2x.entry_status);
5212                         break;
5213                 }
5214                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5215                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5216                 break;
5217         }
5218
5219         default:
5220                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5221                     "qla_target(%d): Received unknown ATIO atio "
5222                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5223                 break;
5224         }
5225
5226         tgt->irq_cmd_count--;
5227 }
5228
5229 /* ha->hardware_lock supposed to be held on entry */
5230 /* called via callback from qla2xxx */
5231 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5232 {
5233         struct qla_hw_data *ha = vha->hw;
5234         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5235
5236         if (unlikely(tgt == NULL)) {
5237                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5238                     "qla_target(%d): Response pkt %x received, but no "
5239                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5240                 return;
5241         }
5242
5243         /*
5244          * In tgt_stop mode we also should allow all requests to pass.
5245          * Otherwise, some commands can stuck.
5246          */
5247
5248         tgt->irq_cmd_count++;
5249
5250         switch (pkt->entry_type) {
5251         case CTIO_CRC2:
5252         case CTIO_TYPE7:
5253         {
5254                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5255                 qlt_do_ctio_completion(vha, entry->handle,
5256                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5257                     entry);
5258                 break;
5259         }
5260
5261         case ACCEPT_TGT_IO_TYPE:
5262         {
5263                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5264                 int rc;
5265                 if (atio->u.isp2x.status !=
5266                     cpu_to_le16(ATIO_CDB_VALID)) {
5267                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5268                             "qla_target(%d): ATIO with error "
5269                             "status %x received\n", vha->vp_idx,
5270                             le16_to_cpu(atio->u.isp2x.status));
5271                         break;
5272                 }
5273
5274                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5275                 if (rc != 0) {
5276                         tgt->irq_cmd_count--;
5277                         return;
5278                 }
5279
5280                 rc = qlt_handle_cmd_for_atio(vha, atio);
5281                 if (unlikely(rc != 0)) {
5282                         if (rc == -ESRCH) {
5283 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5284                                 qlt_send_busy(vha, atio, 0);
5285 #else
5286                                 qlt_send_term_exchange(vha, NULL, atio, 1);
5287 #endif
5288                         } else {
5289                                 if (tgt->tgt_stop) {
5290                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5291                                             "qla_target: Unable to send "
5292                                             "command to target, sending TERM "
5293                                             "EXCHANGE for rsp\n");
5294                                         qlt_send_term_exchange(vha, NULL,
5295                                             atio, 1);
5296                                 } else {
5297                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5298                                             "qla_target(%d): Unable to send "
5299                                             "command to target, sending BUSY "
5300                                             "status\n", vha->vp_idx);
5301                                         qlt_send_busy(vha, atio, 0);
5302                                 }
5303                         }
5304                 }
5305         }
5306         break;
5307
5308         case CONTINUE_TGT_IO_TYPE:
5309         {
5310                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5311                 qlt_do_ctio_completion(vha, entry->handle,
5312                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5313                     entry);
5314                 break;
5315         }
5316
5317         case CTIO_A64_TYPE:
5318         {
5319                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5320                 qlt_do_ctio_completion(vha, entry->handle,
5321                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5322                     entry);
5323                 break;
5324         }
5325
5326         case IMMED_NOTIFY_TYPE:
5327                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5328                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5329                 break;
5330
5331         case NOTIFY_ACK_TYPE:
5332                 if (tgt->notify_ack_expected > 0) {
5333                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5334                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5335                             "NOTIFY_ACK seq %08x status %x\n",
5336                             le16_to_cpu(entry->u.isp2x.seq_id),
5337                             le16_to_cpu(entry->u.isp2x.status));
5338                         tgt->notify_ack_expected--;
5339                         if (entry->u.isp2x.status !=
5340                             cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5341                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5342                                     "qla_target(%d): NOTIFY_ACK "
5343                                     "failed %x\n", vha->vp_idx,
5344                                     le16_to_cpu(entry->u.isp2x.status));
5345                         }
5346                 } else {
5347                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5348                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5349                             vha->vp_idx);
5350                 }
5351                 break;
5352
5353         case ABTS_RECV_24XX:
5354                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5355                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5356                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5357                 break;
5358
5359         case ABTS_RESP_24XX:
5360                 if (tgt->abts_resp_expected > 0) {
5361                         struct abts_resp_from_24xx_fw *entry =
5362                                 (struct abts_resp_from_24xx_fw *)pkt;
5363                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5364                             "ABTS_RESP_24XX: compl_status %x\n",
5365                             entry->compl_status);
5366                         tgt->abts_resp_expected--;
5367                         if (le16_to_cpu(entry->compl_status) !=
5368                             ABTS_RESP_COMPL_SUCCESS) {
5369                                 if ((entry->error_subcode1 == 0x1E) &&
5370                                     (entry->error_subcode2 == 0)) {
5371                                         /*
5372                                          * We've got a race here: aborted
5373                                          * exchange not terminated, i.e.
5374                                          * response for the aborted command was
5375                                          * sent between the abort request was
5376                                          * received and processed.
5377                                          * Unfortunately, the firmware has a
5378                                          * silly requirement that all aborted
5379                                          * exchanges must be explicitely
5380                                          * terminated, otherwise it refuses to
5381                                          * send responses for the abort
5382                                          * requests. So, we have to
5383                                          * (re)terminate the exchange and retry
5384                                          * the abort response.
5385                                          */
5386                                         qlt_24xx_retry_term_exchange(vha,
5387                                             entry);
5388                                 } else
5389                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5390                                             "qla_target(%d): ABTS_RESP_24XX "
5391                                             "failed %x (subcode %x:%x)",
5392                                             vha->vp_idx, entry->compl_status,
5393                                             entry->error_subcode1,
5394                                             entry->error_subcode2);
5395                         }
5396                 } else {
5397                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5398                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5399                             "received\n", vha->vp_idx);
5400                 }
5401                 break;
5402
5403         default:
5404                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5405                     "qla_target(%d): Received unknown response pkt "
5406                     "type %x\n", vha->vp_idx, pkt->entry_type);
5407                 break;
5408         }
5409
5410         tgt->irq_cmd_count--;
5411 }
5412
5413 /*
5414  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5415  */
5416 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5417         uint16_t *mailbox)
5418 {
5419         struct qla_hw_data *ha = vha->hw;
5420         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5421         int login_code;
5422
5423         if (!ha->tgt.tgt_ops)
5424                 return;
5425
5426         if (unlikely(tgt == NULL)) {
5427                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5428                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5429                 return;
5430         }
5431
5432         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5433             IS_QLA2100(ha))
5434                 return;
5435         /*
5436          * In tgt_stop mode we also should allow all requests to pass.
5437          * Otherwise, some commands can stuck.
5438          */
5439
5440         tgt->irq_cmd_count++;
5441
5442         switch (code) {
5443         case MBA_RESET:                 /* Reset */
5444         case MBA_SYSTEM_ERR:            /* System Error */
5445         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5446         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5447                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5448                     "qla_target(%d): System error async event %#x "
5449                     "occurred", vha->vp_idx, code);
5450                 break;
5451         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5452                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5453                 break;
5454
5455         case MBA_LOOP_UP:
5456         {
5457                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5458                     "qla_target(%d): Async LOOP_UP occurred "
5459                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5460                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5461                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5462                 if (tgt->link_reinit_iocb_pending) {
5463                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5464                             0, 0, 0, 0, 0, 0);
5465                         tgt->link_reinit_iocb_pending = 0;
5466                 }
5467                 break;
5468         }
5469
5470         case MBA_LIP_OCCURRED:
5471         case MBA_LOOP_DOWN:
5472         case MBA_LIP_RESET:
5473         case MBA_RSCN_UPDATE:
5474                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5475                     "qla_target(%d): Async event %#x occurred "
5476                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5477                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5478                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5479                 break;
5480
5481         case MBA_PORT_UPDATE:
5482                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5483                     "qla_target(%d): Port update async event %#x "
5484                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5485                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5486                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5487                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5488
5489                 login_code = le16_to_cpu(mailbox[2]);
5490                 if (login_code == 0x4)
5491                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5492                             "Async MB 2: Got PLOGI Complete\n");
5493                 else if (login_code == 0x7)
5494                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5495                             "Async MB 2: Port Logged Out\n");
5496                 break;
5497
5498         default:
5499                 break;
5500         }
5501
5502         tgt->irq_cmd_count--;
5503 }
5504
5505 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5506         uint16_t loop_id)
5507 {
5508         fc_port_t *fcport;
5509         int rc;
5510
5511         fcport = qla2x00_alloc_fcport(vha, GFP_KERNEL);
5512         if (!fcport) {
5513                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5514                     "qla_target(%d): Allocation of tmp FC port failed",
5515                     vha->vp_idx);
5516                 return NULL;
5517         }
5518
5519         fcport->loop_id = loop_id;
5520
5521         rc = qla2x00_get_port_database(vha, fcport, 0);
5522         if (rc != QLA_SUCCESS) {
5523                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5524                     "qla_target(%d): Failed to retrieve fcport "
5525                     "information -- get_port_database() returned %x "
5526                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5527                 kfree(fcport);
5528                 return NULL;
5529         }
5530
5531         return fcport;
5532 }
5533
5534 /* Must be called under tgt_mutex */
5535 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5536         uint8_t *s_id)
5537 {
5538         struct qla_tgt_sess *sess = NULL;
5539         fc_port_t *fcport = NULL;
5540         int rc, global_resets;
5541         uint16_t loop_id = 0;
5542
5543 retry:
5544         global_resets =
5545             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5546
5547         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5548         if (rc != 0) {
5549                 if ((s_id[0] == 0xFF) &&
5550                     (s_id[1] == 0xFC)) {
5551                         /*
5552                          * This is Domain Controller, so it should be
5553                          * OK to drop SCSI commands from it.
5554                          */
5555                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5556                             "Unable to find initiator with S_ID %x:%x:%x",
5557                             s_id[0], s_id[1], s_id[2]);
5558                 } else
5559                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
5560                             "qla_target(%d): Unable to find "
5561                             "initiator with S_ID %x:%x:%x",
5562                             vha->vp_idx, s_id[0], s_id[1],
5563                             s_id[2]);
5564                 return NULL;
5565         }
5566
5567         fcport = qlt_get_port_database(vha, loop_id);
5568         if (!fcport)
5569                 return NULL;
5570
5571         if (global_resets !=
5572             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5573                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5574                     "qla_target(%d): global reset during session discovery "
5575                     "(counter was %d, new %d), retrying", vha->vp_idx,
5576                     global_resets,
5577                     atomic_read(&vha->vha_tgt.
5578                         qla_tgt->tgt_global_resets_count));
5579                 goto retry;
5580         }
5581
5582         sess = qlt_create_sess(vha, fcport, true);
5583
5584         kfree(fcport);
5585         return sess;
5586 }
5587
5588 static void qlt_abort_work(struct qla_tgt *tgt,
5589         struct qla_tgt_sess_work_param *prm)
5590 {
5591         struct scsi_qla_host *vha = tgt->vha;
5592         struct qla_hw_data *ha = vha->hw;
5593         struct qla_tgt_sess *sess = NULL;
5594         unsigned long flags;
5595         uint32_t be_s_id;
5596         uint8_t s_id[3];
5597         int rc;
5598
5599         spin_lock_irqsave(&ha->hardware_lock, flags);
5600
5601         if (tgt->tgt_stop)
5602                 goto out_term;
5603
5604         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5605         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5606         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5607
5608         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5609             (unsigned char *)&be_s_id);
5610         if (!sess) {
5611                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5612
5613                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5614                 sess = qlt_make_local_sess(vha, s_id);
5615                 /* sess has got an extra creation ref */
5616                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5617
5618                 spin_lock_irqsave(&ha->hardware_lock, flags);
5619                 if (!sess)
5620                         goto out_term;
5621         } else {
5622                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5623                         sess = NULL;
5624                         goto out_term;
5625                 }
5626
5627                 kref_get(&sess->se_sess->sess_kref);
5628         }
5629
5630         if (tgt->tgt_stop)
5631                 goto out_term;
5632
5633         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5634         if (rc != 0)
5635                 goto out_term;
5636
5637         ha->tgt.tgt_ops->put_sess(sess);
5638         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5639         return;
5640
5641 out_term:
5642         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5643         if (sess)
5644                 ha->tgt.tgt_ops->put_sess(sess);
5645         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5646 }
5647
5648 static void qlt_tmr_work(struct qla_tgt *tgt,
5649         struct qla_tgt_sess_work_param *prm)
5650 {
5651         struct atio_from_isp *a = &prm->tm_iocb2;
5652         struct scsi_qla_host *vha = tgt->vha;
5653         struct qla_hw_data *ha = vha->hw;
5654         struct qla_tgt_sess *sess = NULL;
5655         unsigned long flags;
5656         uint8_t *s_id = NULL; /* to hide compiler warnings */
5657         int rc;
5658         uint32_t lun, unpacked_lun;
5659         int fn;
5660         void *iocb;
5661
5662         spin_lock_irqsave(&ha->hardware_lock, flags);
5663
5664         if (tgt->tgt_stop)
5665                 goto out_term;
5666
5667         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5668         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5669         if (!sess) {
5670                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5671
5672                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5673                 sess = qlt_make_local_sess(vha, s_id);
5674                 /* sess has got an extra creation ref */
5675                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5676
5677                 spin_lock_irqsave(&ha->hardware_lock, flags);
5678                 if (!sess)
5679                         goto out_term;
5680         } else {
5681                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5682                         sess = NULL;
5683                         goto out_term;
5684                 }
5685
5686                 kref_get(&sess->se_sess->sess_kref);
5687         }
5688
5689         iocb = a;
5690         lun = a->u.isp24.fcp_cmnd.lun;
5691         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5692         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5693
5694         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5695         if (rc != 0)
5696                 goto out_term;
5697
5698         ha->tgt.tgt_ops->put_sess(sess);
5699         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5700         return;
5701
5702 out_term:
5703         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5704         if (sess)
5705                 ha->tgt.tgt_ops->put_sess(sess);
5706         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5707 }
5708
5709 static void qlt_sess_work_fn(struct work_struct *work)
5710 {
5711         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5712         struct scsi_qla_host *vha = tgt->vha;
5713         unsigned long flags;
5714
5715         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5716
5717         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5718         while (!list_empty(&tgt->sess_works_list)) {
5719                 struct qla_tgt_sess_work_param *prm = list_entry(
5720                     tgt->sess_works_list.next, typeof(*prm),
5721                     sess_works_list_entry);
5722
5723                 /*
5724                  * This work can be scheduled on several CPUs at time, so we
5725                  * must delete the entry to eliminate double processing
5726                  */
5727                 list_del(&prm->sess_works_list_entry);
5728
5729                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5730
5731                 switch (prm->type) {
5732                 case QLA_TGT_SESS_WORK_ABORT:
5733                         qlt_abort_work(tgt, prm);
5734                         break;
5735                 case QLA_TGT_SESS_WORK_TM:
5736                         qlt_tmr_work(tgt, prm);
5737                         break;
5738                 default:
5739                         BUG_ON(1);
5740                         break;
5741                 }
5742
5743                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5744
5745                 kfree(prm);
5746         }
5747         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5748 }
5749
5750 /* Must be called under tgt_host_action_mutex */
5751 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5752 {
5753         struct qla_tgt *tgt;
5754
5755         if (!QLA_TGT_MODE_ENABLED())
5756                 return 0;
5757
5758         if (!IS_TGT_MODE_CAPABLE(ha)) {
5759                 ql_log(ql_log_warn, base_vha, 0xe070,
5760                     "This adapter does not support target mode.\n");
5761                 return 0;
5762         }
5763
5764         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5765             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5766
5767         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5768
5769         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5770         if (!tgt) {
5771                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5772                     "Unable to allocate struct qla_tgt\n");
5773                 return -ENOMEM;
5774         }
5775
5776         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5777                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5778
5779         tgt->ha = ha;
5780         tgt->vha = base_vha;
5781         init_waitqueue_head(&tgt->waitQ);
5782         INIT_LIST_HEAD(&tgt->sess_list);
5783         INIT_LIST_HEAD(&tgt->del_sess_list);
5784         INIT_DELAYED_WORK(&tgt->sess_del_work,
5785                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5786         spin_lock_init(&tgt->sess_work_lock);
5787         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5788         INIT_LIST_HEAD(&tgt->sess_works_list);
5789         spin_lock_init(&tgt->srr_lock);
5790         INIT_LIST_HEAD(&tgt->srr_ctio_list);
5791         INIT_LIST_HEAD(&tgt->srr_imm_list);
5792         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5793         atomic_set(&tgt->tgt_global_resets_count, 0);
5794
5795         base_vha->vha_tgt.qla_tgt = tgt;
5796
5797         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5798                 "qla_target(%d): using 64 Bit PCI addressing",
5799                 base_vha->vp_idx);
5800         tgt->tgt_enable_64bit_addr = 1;
5801         /* 3 is reserved */
5802         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5803         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5804         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5805
5806         if (base_vha->fc_vport)
5807                 return 0;
5808
5809         mutex_lock(&qla_tgt_mutex);
5810         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5811         mutex_unlock(&qla_tgt_mutex);
5812
5813         return 0;
5814 }
5815
5816 /* Must be called under tgt_host_action_mutex */
5817 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5818 {
5819         if (!vha->vha_tgt.qla_tgt)
5820                 return 0;
5821
5822         if (vha->fc_vport) {
5823                 qlt_release(vha->vha_tgt.qla_tgt);
5824                 return 0;
5825         }
5826
5827         /* free left over qfull cmds */
5828         qlt_init_term_exchange(vha);
5829
5830         mutex_lock(&qla_tgt_mutex);
5831         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5832         mutex_unlock(&qla_tgt_mutex);
5833
5834         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5835             vha->host_no, ha);
5836         qlt_release(vha->vha_tgt.qla_tgt);
5837
5838         return 0;
5839 }
5840
5841 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5842         unsigned char *b)
5843 {
5844         int i;
5845
5846         pr_debug("qla2xxx HW vha->node_name: ");
5847         for (i = 0; i < WWN_SIZE; i++)
5848                 pr_debug("%02x ", vha->node_name[i]);
5849         pr_debug("\n");
5850         pr_debug("qla2xxx HW vha->port_name: ");
5851         for (i = 0; i < WWN_SIZE; i++)
5852                 pr_debug("%02x ", vha->port_name[i]);
5853         pr_debug("\n");
5854
5855         pr_debug("qla2xxx passed configfs WWPN: ");
5856         put_unaligned_be64(wwpn, b);
5857         for (i = 0; i < WWN_SIZE; i++)
5858                 pr_debug("%02x ", b[i]);
5859         pr_debug("\n");
5860 }
5861
5862 /**
5863  * qla_tgt_lport_register - register lport with external module
5864  *
5865  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5866  * @wwpn: Passwd FC target WWPN
5867  * @callback:  lport initialization callback for tcm_qla2xxx code
5868  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5869  */
5870 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5871                        u64 npiv_wwpn, u64 npiv_wwnn,
5872                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5873 {
5874         struct qla_tgt *tgt;
5875         struct scsi_qla_host *vha;
5876         struct qla_hw_data *ha;
5877         struct Scsi_Host *host;
5878         unsigned long flags;
5879         int rc;
5880         u8 b[WWN_SIZE];
5881
5882         mutex_lock(&qla_tgt_mutex);
5883         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5884                 vha = tgt->vha;
5885                 ha = vha->hw;
5886
5887                 host = vha->host;
5888                 if (!host)
5889                         continue;
5890
5891                 if (!(host->hostt->supported_mode & MODE_TARGET))
5892                         continue;
5893
5894                 spin_lock_irqsave(&ha->hardware_lock, flags);
5895                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5896                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5897                             host->host_no);
5898                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5899                         continue;
5900                 }
5901                 if (tgt->tgt_stop) {
5902                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5903                                  host->host_no);
5904                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5905                         continue;
5906                 }
5907                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5908
5909                 if (!scsi_host_get(host)) {
5910                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
5911                             "Unable to scsi_host_get() for"
5912                             " qla2xxx scsi_host\n");
5913                         continue;
5914                 }
5915                 qlt_lport_dump(vha, phys_wwpn, b);
5916
5917                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5918                         scsi_host_put(host);
5919                         continue;
5920                 }
5921                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5922                 if (rc != 0)
5923                         scsi_host_put(host);
5924
5925                 mutex_unlock(&qla_tgt_mutex);
5926                 return rc;
5927         }
5928         mutex_unlock(&qla_tgt_mutex);
5929
5930         return -ENODEV;
5931 }
5932 EXPORT_SYMBOL(qlt_lport_register);
5933
5934 /**
5935  * qla_tgt_lport_deregister - Degister lport
5936  *
5937  * @vha:  Registered scsi_qla_host pointer
5938  */
5939 void qlt_lport_deregister(struct scsi_qla_host *vha)
5940 {
5941         struct qla_hw_data *ha = vha->hw;
5942         struct Scsi_Host *sh = vha->host;
5943         /*
5944          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5945          */
5946         vha->vha_tgt.target_lport_ptr = NULL;
5947         ha->tgt.tgt_ops = NULL;
5948         /*
5949          * Release the Scsi_Host reference for the underlying qla2xxx host
5950          */
5951         scsi_host_put(sh);
5952 }
5953 EXPORT_SYMBOL(qlt_lport_deregister);
5954
5955 /* Must be called under HW lock */
5956 static void qlt_set_mode(struct scsi_qla_host *vha)
5957 {
5958         struct qla_hw_data *ha = vha->hw;
5959
5960         switch (ql2x_ini_mode) {
5961         case QLA2XXX_INI_MODE_DISABLED:
5962         case QLA2XXX_INI_MODE_EXCLUSIVE:
5963                 vha->host->active_mode = MODE_TARGET;
5964                 break;
5965         case QLA2XXX_INI_MODE_ENABLED:
5966                 vha->host->active_mode |= MODE_TARGET;
5967                 break;
5968         default:
5969                 break;
5970         }
5971
5972         if (ha->tgt.ini_mode_force_reverse)
5973                 qla_reverse_ini_mode(vha);
5974 }
5975
5976 /* Must be called under HW lock */
5977 static void qlt_clear_mode(struct scsi_qla_host *vha)
5978 {
5979         struct qla_hw_data *ha = vha->hw;
5980
5981         switch (ql2x_ini_mode) {
5982         case QLA2XXX_INI_MODE_DISABLED:
5983                 vha->host->active_mode = MODE_UNKNOWN;
5984                 break;
5985         case QLA2XXX_INI_MODE_EXCLUSIVE:
5986                 vha->host->active_mode = MODE_INITIATOR;
5987                 break;
5988         case QLA2XXX_INI_MODE_ENABLED:
5989                 vha->host->active_mode &= ~MODE_TARGET;
5990                 break;
5991         default:
5992                 break;
5993         }
5994
5995         if (ha->tgt.ini_mode_force_reverse)
5996                 qla_reverse_ini_mode(vha);
5997 }
5998
5999 /*
6000  * qla_tgt_enable_vha - NO LOCK HELD
6001  *
6002  * host_reset, bring up w/ Target Mode Enabled
6003  */
6004 void
6005 qlt_enable_vha(struct scsi_qla_host *vha)
6006 {
6007         struct qla_hw_data *ha = vha->hw;
6008         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6009         unsigned long flags;
6010         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6011
6012         if (!tgt) {
6013                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6014                     "Unable to locate qla_tgt pointer from"
6015                     " struct qla_hw_data\n");
6016                 dump_stack();
6017                 return;
6018         }
6019
6020         spin_lock_irqsave(&ha->hardware_lock, flags);
6021         tgt->tgt_stopped = 0;
6022         qlt_set_mode(vha);
6023         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6024
6025         if (vha->vp_idx) {
6026                 qla24xx_disable_vp(vha);
6027                 qla24xx_enable_vp(vha);
6028         } else {
6029                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6030                 qla2xxx_wake_dpc(base_vha);
6031                 WARN_ON_ONCE(qla2x00_wait_for_hba_online(base_vha) !=
6032                              QLA_SUCCESS);
6033         }
6034 }
6035 EXPORT_SYMBOL(qlt_enable_vha);
6036
6037 /*
6038  * qla_tgt_disable_vha - NO LOCK HELD
6039  *
6040  * Disable Target Mode and reset the adapter
6041  */
6042 static void qlt_disable_vha(struct scsi_qla_host *vha)
6043 {
6044         struct qla_hw_data *ha = vha->hw;
6045         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6046         unsigned long flags;
6047
6048         if (!tgt) {
6049                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6050                     "Unable to locate qla_tgt pointer from"
6051                     " struct qla_hw_data\n");
6052                 dump_stack();
6053                 return;
6054         }
6055
6056         spin_lock_irqsave(&ha->hardware_lock, flags);
6057         qlt_clear_mode(vha);
6058         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6059
6060         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6061         qla2xxx_wake_dpc(vha);
6062         if (qla2x00_wait_for_hba_online(vha) != QLA_SUCCESS)
6063                 ql_dbg(ql_dbg_tgt, vha, 0xe081,
6064                        "qla2x00_wait_for_hba_online() failed\n");
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 = cpu_to_le16(0xFFFF);
6218
6219                 /* Enable target mode */
6220                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6221
6222                 /* Disable ini mode, if requested */
6223                 if (!qla_ini_mode_enabled(vha))
6224                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6225
6226                 /* Disable Full Login after LIP */
6227                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6228                 /* Enable initial LIP */
6229                 nv->firmware_options_1 &= 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 &= cpu_to_le32(~BIT_10);
6239                 /* Enable target PRLI control */
6240                 nv->firmware_options_2 |= 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 |= 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 &= ~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 |= 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 = cpu_to_le16(0xFFFF);
6305
6306                 /* Enable target mode */
6307                 nv->firmware_options_1 |= cpu_to_le32(BIT_4);
6308
6309                 /* Disable ini mode, if requested */
6310                 if (!qla_ini_mode_enabled(vha))
6311                         nv->firmware_options_1 |= cpu_to_le32(BIT_5);
6312
6313                 /* Disable Full Login after LIP */
6314                 nv->firmware_options_1 &= cpu_to_le32(~BIT_13);
6315                 /* Enable initial LIP */
6316                 nv->firmware_options_1 &= cpu_to_le32(~BIT_9);
6317                 if (ql2xtgt_tape_enable)
6318                         /* Enable FC tape support */
6319                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6320                 else
6321                         /* Disable FC tape support */
6322                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6323
6324                 /* Disable Full Login after LIP */
6325                 nv->host_p &= cpu_to_le32(~BIT_10);
6326                 /* Enable target PRLI control */
6327                 nv->firmware_options_2 |= cpu_to_le32(BIT_14);
6328         } else {
6329                 if (ha->tgt.saved_set) {
6330                         nv->exchange_count = ha->tgt.saved_exchange_count;
6331                         nv->firmware_options_1 =
6332                             ha->tgt.saved_firmware_options_1;
6333                         nv->firmware_options_2 =
6334                             ha->tgt.saved_firmware_options_2;
6335                         nv->firmware_options_3 =
6336                             ha->tgt.saved_firmware_options_3;
6337                 }
6338                 return;
6339         }
6340
6341         /* out-of-order frames reassembly */
6342         nv->firmware_options_3 |= BIT_6|BIT_9;
6343
6344         if (ha->tgt.enable_class_2) {
6345                 if (vha->flags.init_done)
6346                         fc_host_supported_classes(vha->host) =
6347                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6348
6349                 nv->firmware_options_2 |= cpu_to_le32(BIT_8);
6350         } else {
6351                 if (vha->flags.init_done)
6352                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6353
6354                 nv->firmware_options_2 &= ~cpu_to_le32(BIT_8);
6355         }
6356 }
6357
6358 void
6359 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6360         struct init_cb_81xx *icb)
6361 {
6362         struct qla_hw_data *ha = vha->hw;
6363
6364         if (!QLA_TGT_MODE_ENABLED())
6365                 return;
6366
6367         if (ha->tgt.node_name_set) {
6368                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6369                 icb->firmware_options_1 |= cpu_to_le32(BIT_14);
6370         }
6371 }
6372
6373 void
6374 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6375 {
6376         if (!QLA_TGT_MODE_ENABLED())
6377                 return;
6378
6379         ha->msix_count += 1; /* For ATIO Q */
6380 }
6381
6382 int
6383 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6384         struct sts_entry_24xx *pkt)
6385 {
6386         switch (pkt->entry_type) {
6387         case ABTS_RECV_24XX:
6388         case ABTS_RESP_24XX:
6389         case CTIO_TYPE7:
6390         case NOTIFY_ACK_TYPE:
6391         case CTIO_CRC2:
6392                 return 1;
6393         default:
6394                 return 0;
6395         }
6396 }
6397
6398 void
6399 qlt_modify_vp_config(struct scsi_qla_host *vha,
6400         struct vp_config_entry_24xx *vpmod)
6401 {
6402         if (qla_tgt_mode_enabled(vha))
6403                 vpmod->options_idx1 &= ~BIT_5;
6404         /* Disable ini mode, if requested */
6405         if (!qla_ini_mode_enabled(vha))
6406                 vpmod->options_idx1 &= ~BIT_4;
6407 }
6408
6409 void
6410 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6411 {
6412         if (!QLA_TGT_MODE_ENABLED())
6413                 return;
6414
6415         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6416                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6417                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6418         } else {
6419                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6420                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6421         }
6422
6423         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6424         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6425         qlt_clear_mode(base_vha);
6426 }
6427
6428 irqreturn_t
6429 qla83xx_msix_atio_q(int irq, void *dev_id)
6430 {
6431         struct rsp_que *rsp;
6432         scsi_qla_host_t *vha;
6433         struct qla_hw_data *ha;
6434         unsigned long flags;
6435
6436         rsp = (struct rsp_que *) dev_id;
6437         ha = rsp->hw;
6438         vha = pci_get_drvdata(ha->pdev);
6439
6440         spin_lock_irqsave(&ha->hardware_lock, flags);
6441
6442         qlt_24xx_process_atio_queue(vha);
6443         qla24xx_process_response_queue(vha, rsp);
6444
6445         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6446
6447         return IRQ_HANDLED;
6448 }
6449
6450 int
6451 qlt_mem_alloc(struct qla_hw_data *ha)
6452 {
6453         if (!QLA_TGT_MODE_ENABLED())
6454                 return 0;
6455
6456         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6457             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6458         if (!ha->tgt.tgt_vp_map)
6459                 return -ENOMEM;
6460
6461         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6462             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6463             &ha->tgt.atio_dma, GFP_KERNEL);
6464         if (!ha->tgt.atio_ring) {
6465                 kfree(ha->tgt.tgt_vp_map);
6466                 return -ENOMEM;
6467         }
6468         return 0;
6469 }
6470
6471 void
6472 qlt_mem_free(struct qla_hw_data *ha)
6473 {
6474         if (!QLA_TGT_MODE_ENABLED())
6475                 return;
6476
6477         if (ha->tgt.atio_ring) {
6478                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6479                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6480                     ha->tgt.atio_dma);
6481         }
6482         kfree(ha->tgt.tgt_vp_map);
6483 }
6484
6485 /* vport_slock to be held by the caller */
6486 void
6487 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6488 {
6489         if (!QLA_TGT_MODE_ENABLED())
6490                 return;
6491
6492         switch (cmd) {
6493         case SET_VP_IDX:
6494                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6495                 break;
6496         case SET_AL_PA:
6497                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6498                 break;
6499         case RESET_VP_IDX:
6500                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6501                 break;
6502         case RESET_AL_PA:
6503                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6504                 break;
6505         }
6506 }
6507
6508 static int __init qlt_parse_ini_mode(void)
6509 {
6510         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6511                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6512         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6513                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6514         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6515                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6516         else
6517                 return false;
6518
6519         return true;
6520 }
6521
6522 int __init qlt_init(void)
6523 {
6524         int ret;
6525
6526         if (!qlt_parse_ini_mode()) {
6527                 ql_log(ql_log_fatal, NULL, 0xe06b,
6528                     "qlt_parse_ini_mode() failed\n");
6529                 return -EINVAL;
6530         }
6531
6532         if (!QLA_TGT_MODE_ENABLED())
6533                 return 0;
6534
6535         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6536             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6537             qla_tgt_mgmt_cmd), 0, NULL);
6538         if (!qla_tgt_mgmt_cmd_cachep) {
6539                 ql_log(ql_log_fatal, NULL, 0xe06d,
6540                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6541                 return -ENOMEM;
6542         }
6543
6544         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6545             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6546         if (!qla_tgt_mgmt_cmd_mempool) {
6547                 ql_log(ql_log_fatal, NULL, 0xe06e,
6548                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6549                 ret = -ENOMEM;
6550                 goto out_mgmt_cmd_cachep;
6551         }
6552
6553         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6554         if (!qla_tgt_wq) {
6555                 ql_log(ql_log_fatal, NULL, 0xe06f,
6556                     "alloc_workqueue for qla_tgt_wq failed\n");
6557                 ret = -ENOMEM;
6558                 goto out_cmd_mempool;
6559         }
6560         /*
6561          * Return 1 to signal that initiator-mode is being disabled
6562          */
6563         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6564
6565 out_cmd_mempool:
6566         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6567 out_mgmt_cmd_cachep:
6568         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6569         return ret;
6570 }
6571
6572 void qlt_exit(void)
6573 {
6574         if (!QLA_TGT_MODE_ENABLED())
6575                 return;
6576
6577         destroy_workqueue(qla_tgt_wq);
6578         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6579         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6580 }