drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static int ql2xtgt_tape_enable;
  46 module_param(ql2xtgt_tape_enable, int, S_IRUGO|S_IWUSR);
  47 MODULE_PARM_DESC(ql2xtgt_tape_enable,
  48                 "Enables Sequence level error recovery (aka FC Tape). Default is 0 - no SLER. 1 - Enable SLER.");
  49
  50 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  51 module_param(qlini_mode, charp, S_IRUGO);
  52 MODULE_PARM_DESC(qlini_mode,
  53         "Determines when initiator mode will be enabled. Possible values: "
  54         "\"exclusive\" - initiator mode will be enabled on load, "
  55         "disabled on enabling target mode and then on disabling target mode "
  56         "enabled back; "
  57         "\"disabled\" - initiator mode will never be enabled; "
  58         "\"enabled\" (default) - initiator mode will always stay enabled.");
  59
  60 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  61
  62 static int temp_sam_status = SAM_STAT_BUSY;
  63
  64 /*
  65  * From scsi/fc/fc_fcp.h
  66  */
  67 enum fcp_resp_rsp_codes {
  68         FCP_TMF_CMPL = 0,
  69         FCP_DATA_LEN_INVALID = 1,
  70         FCP_CMND_FIELDS_INVALID = 2,
  71         FCP_DATA_PARAM_MISMATCH = 3,
  72         FCP_TMF_REJECTED = 4,
  73         FCP_TMF_FAILED = 5,
  74         FCP_TMF_INVALID_LUN = 9,
  75 };
  76
  77 /*
  78  * fc_pri_ta from scsi/fc/fc_fcp.h
  79  */
  80 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  81 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  82 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  83 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  84 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  85 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  86 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  87
  88 /*
  89  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  90  * must be called under HW lock and could unlock/lock it inside.
  91  * It isn't an issue, since in the current implementation on the time when
  92  * those functions are called:
  93  *
  94  *   - Either context is IRQ and only IRQ handler can modify HW data,
  95  *     including rings related fields,
  96  *
  97  *   - Or access to target mode variables from struct qla_tgt doesn't
  98  *     cross those functions boundaries, except tgt_stop, which
  99  *     additionally protected by irq_cmd_count.
 100  */
 101 /* Predefs for callbacks handed to qla2xxx LLD */
 102 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
 103         struct atio_from_isp *pkt);
 104 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
 105 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
 106         int fn, void *iocb, int flags);
 107 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 108         *cmd, struct atio_from_isp *atio, int ha_locked);
 109 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 110         struct qla_tgt_srr_imm *imm, int ha_lock);
 111 static void qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha,
 112         struct qla_tgt_cmd *cmd);
 113 static void qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
 114         struct atio_from_isp *atio, uint16_t status, int qfull);
 115 static void qlt_disable_vha(struct scsi_qla_host *vha);
 116 static void qlt_clear_tgt_db(struct qla_tgt *tgt);
 117 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 118         struct imm_ntfy_from_isp *ntfy,
 119         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 120         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan);
 121 /*
 122  * Global Variables
 123  */
 124 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 125 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 126 static struct workqueue_struct *qla_tgt_wq;
 127 static DEFINE_MUTEX(qla_tgt_mutex);
 128 static LIST_HEAD(qla_tgt_glist);
 129
 130 /* This API intentionally takes dest as a parameter, rather than returning
 131  * int value to avoid caller forgetting to issue wmb() after the store */
 132 void qlt_do_generation_tick(struct scsi_qla_host *vha, int *dest)
 133 {
 134         scsi_qla_host_t *base_vha = pci_get_drvdata(vha->hw->pdev);
 135         *dest = atomic_inc_return(&base_vha->generation_tick);
 136         /* memory barrier */
 137         wmb();
 138 }
 139
 140 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 141 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 142         struct qla_tgt *tgt,
 143         const uint8_t *port_name)
 144 {
 145         struct qla_tgt_sess *sess;
 146
 147         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 148                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 149                         return sess;
 150         }
 151
 152         return NULL;
 153 }
 154
 155 /* Might release hw lock, then reaquire!! */
 156 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 157 {
 158         /* Send marker if required */
 159         if (unlikely(vha->marker_needed != 0)) {
 160                 int rc = qla2x00_issue_marker(vha, vha_locked);
 161                 if (rc != QLA_SUCCESS) {
 162                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 163                             "qla_target(%d): issue_marker() failed\n",
 164                             vha->vp_idx);
 165                 }
 166                 return rc;
 167         }
 168         return QLA_SUCCESS;
 169 }
 170
 171 static inline
 172 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 173         uint8_t *d_id)
 174 {
 175         struct qla_hw_data *ha = vha->hw;
 176         uint8_t vp_idx;
 177
 178         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 179                 return NULL;
 180
 181         if (vha->d_id.b.al_pa == d_id[2])
 182                 return vha;
 183
 184         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 185         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 186         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 187                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 188
 189         return NULL;
 190 }
 191
 192 static inline
 193 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 194         uint16_t vp_idx)
 195 {
 196         struct qla_hw_data *ha = vha->hw;
 197
 198         if (vha->vp_idx == vp_idx)
 199                 return vha;
 200
 201         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 202         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 203                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 204
 205         return NULL;
 206 }
 207
 208 static inline void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 209 {
 210         unsigned long flags;
 211
 212         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 213
 214         vha->hw->tgt.num_pend_cmds++;
 215         if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
 216                 vha->hw->qla_stats.stat_max_pend_cmds =
 217                         vha->hw->tgt.num_pend_cmds;
 218         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 219 }
 220 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 221 {
 222         unsigned long flags;
 223
 224         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 225         vha->hw->tgt.num_pend_cmds--;
 226         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 227 }
 228
 229 static void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 230         struct atio_from_isp *atio)
 231 {
 232         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 233                 "%s: qla_target(%d): type %x ox_id %04x\n",
 234                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 235                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 236
 237         switch (atio->u.raw.entry_type) {
 238         case ATIO_TYPE7:
 239         {
 240                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 241                     atio->u.isp24.fcp_hdr.d_id);
 242                 if (unlikely(NULL == host)) {
 243                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 244                             "qla_target(%d): Received ATIO_TYPE7 "
 245                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 246                             atio->u.isp24.fcp_hdr.d_id[0],
 247                             atio->u.isp24.fcp_hdr.d_id[1],
 248                             atio->u.isp24.fcp_hdr.d_id[2]);
 249                         break;
 250                 }
 251                 qlt_24xx_atio_pkt(host, atio);
 252                 break;
 253         }
 254
 255         case IMMED_NOTIFY_TYPE:
 256         {
 257                 struct scsi_qla_host *host = vha;
 258                 struct imm_ntfy_from_isp *entry =
 259                     (struct imm_ntfy_from_isp *)atio;
 260
 261                 if ((entry->u.isp24.vp_index != 0xFF) &&
 262                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 263                         host = qlt_find_host_by_vp_idx(vha,
 264                             entry->u.isp24.vp_index);
 265                         if (unlikely(!host)) {
 266                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 267                                     "qla_target(%d): Received "
 268                                     "ATIO (IMMED_NOTIFY_TYPE) "
 269                                     "with unknown vp_index %d\n",
 270                                     vha->vp_idx, entry->u.isp24.vp_index);
 271                                 break;
 272                         }
 273                 }
 274                 qlt_24xx_atio_pkt(host, atio);
 275                 break;
 276         }
 277
 278         default:
 279                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 280                     "qla_target(%d): Received unknown ATIO atio "
 281                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 282                 break;
 283         }
 284
 285         return;
 286 }
 287
 288 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 289 {
 290         switch (pkt->entry_type) {
 291         case CTIO_CRC2:
 292                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 293                         "qla_target(%d):%s: CRC2 Response pkt\n",
 294                         vha->vp_idx, __func__);
 295         case CTIO_TYPE7:
 296         {
 297                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 298                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 299                     entry->vp_index);
 300                 if (unlikely(!host)) {
 301                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 302                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 303                             "received, with unknown vp_index %d\n",
 304                             vha->vp_idx, entry->vp_index);
 305                         break;
 306                 }
 307                 qlt_response_pkt(host, pkt);
 308                 break;
 309         }
 310
 311         case IMMED_NOTIFY_TYPE:
 312         {
 313                 struct scsi_qla_host *host = vha;
 314                 struct imm_ntfy_from_isp *entry =
 315                     (struct imm_ntfy_from_isp *)pkt;
 316
 317                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 318                 if (unlikely(!host)) {
 319                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 320                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 321                             "received, with unknown vp_index %d\n",
 322                             vha->vp_idx, entry->u.isp24.vp_index);
 323                         break;
 324                 }
 325                 qlt_response_pkt(host, pkt);
 326                 break;
 327         }
 328
 329         case NOTIFY_ACK_TYPE:
 330         {
 331                 struct scsi_qla_host *host = vha;
 332                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 333
 334                 if (0xFF != entry->u.isp24.vp_index) {
 335                         host = qlt_find_host_by_vp_idx(vha,
 336                             entry->u.isp24.vp_index);
 337                         if (unlikely(!host)) {
 338                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 339                                     "qla_target(%d): Response "
 340                                     "pkt (NOTIFY_ACK_TYPE) "
 341                                     "received, with unknown "
 342                                     "vp_index %d\n", vha->vp_idx,
 343                                     entry->u.isp24.vp_index);
 344                                 break;
 345                         }
 346                 }
 347                 qlt_response_pkt(host, pkt);
 348                 break;
 349         }
 350
 351         case ABTS_RECV_24XX:
 352         {
 353                 struct abts_recv_from_24xx *entry =
 354                     (struct abts_recv_from_24xx *)pkt;
 355                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 356                     entry->vp_index);
 357                 if (unlikely(!host)) {
 358                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 359                             "qla_target(%d): Response pkt "
 360                             "(ABTS_RECV_24XX) received, with unknown "
 361                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 362                         break;
 363                 }
 364                 qlt_response_pkt(host, pkt);
 365                 break;
 366         }
 367
 368         case ABTS_RESP_24XX:
 369         {
 370                 struct abts_resp_to_24xx *entry =
 371                     (struct abts_resp_to_24xx *)pkt;
 372                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 373                     entry->vp_index);
 374                 if (unlikely(!host)) {
 375                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 376                             "qla_target(%d): Response pkt "
 377                             "(ABTS_RECV_24XX) received, with unknown "
 378                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 379                         break;
 380                 }
 381                 qlt_response_pkt(host, pkt);
 382                 break;
 383         }
 384
 385         default:
 386                 qlt_response_pkt(vha, pkt);
 387                 break;
 388         }
 389
 390 }
 391
 392 static void qlt_free_session_done(struct work_struct *work)
 393 {
 394         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 395             free_work);
 396         struct qla_tgt *tgt = sess->tgt;
 397         struct scsi_qla_host *vha = sess->vha;
 398         struct qla_hw_data *ha = vha->hw;
 399         unsigned long flags;
 400         bool logout_started = false;
 401         fc_port_t fcport;
 402
 403         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf084,
 404                 "%s: se_sess %p / sess %p from port %8phC loop_id %#04x"
 405                 " s_id %02x:%02x:%02x logout %d keep %d plogi %d\n",
 406                 __func__, sess->se_sess, sess, sess->port_name, sess->loop_id,
 407                 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 408                 sess->logout_on_delete, sess->keep_nport_handle,
 409                 sess->plogi_ack_needed);
 410
 411         BUG_ON(!tgt);
 412
 413         if (sess->logout_on_delete) {
 414                 int rc;
 415
 416                 memset(&fcport, 0, sizeof(fcport));
 417                 fcport.loop_id = sess->loop_id;
 418                 fcport.d_id = sess->s_id;
 419                 memcpy(fcport.port_name, sess->port_name, WWN_SIZE);
 420                 fcport.vha = vha;
 421                 fcport.tgt_session = sess;
 422
 423                 rc = qla2x00_post_async_logout_work(vha, &fcport, NULL);
 424                 if (rc != QLA_SUCCESS)
 425                         ql_log(ql_log_warn, vha, 0xf085,
 426                                "Schedule logo failed sess %p rc %d\n",
 427                                sess, rc);
 428                 else
 429                         logout_started = true;
 430         }
 431
 432         /*
 433          * Release the target session for FC Nexus from fabric module code.
 434          */
 435         if (sess->se_sess != NULL)
 436                 ha->tgt.tgt_ops->free_session(sess);
 437
 438         if (logout_started) {
 439                 bool traced = false;
 440
 441                 while (!ACCESS_ONCE(sess->logout_completed)) {
 442                         if (!traced) {
 443                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf086,
 444                                         "%s: waiting for sess %p logout\n",
 445                                         __func__, sess);
 446                                 traced = true;
 447                         }
 448                         msleep(100);
 449                 }
 450
 451                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf087,
 452                         "%s: sess %p logout completed\n",
 453                         __func__, sess);
 454         }
 455
 456         spin_lock_irqsave(&ha->hardware_lock, flags);
 457
 458         if (sess->plogi_ack_needed)
 459                 qlt_send_notify_ack(vha, &sess->tm_iocb,
 460                                     0, 0, 0, 0, 0, 0);
 461
 462         list_del(&sess->sess_list_entry);
 463
 464         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 465
 466         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 467             "Unregistration of sess %p finished\n", sess);
 468
 469         kfree(sess);
 470         /*
 471          * We need to protect against race, when tgt is freed before or
 472          * inside wake_up()
 473          */
 474         tgt->sess_count--;
 475         if (tgt->sess_count == 0)
 476                 wake_up_all(&tgt->waitQ);
 477 }
 478
 479 /* ha->hardware_lock supposed to be held on entry */
 480 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 481 {
 482         struct scsi_qla_host *vha = sess->vha;
 483
 484         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 485
 486         if (!list_empty(&sess->del_list_entry))
 487                 list_del_init(&sess->del_list_entry);
 488         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 489
 490         INIT_WORK(&sess->free_work, qlt_free_session_done);
 491         schedule_work(&sess->free_work);
 492 }
 493 EXPORT_SYMBOL(qlt_unreg_sess);
 494
 495 /* ha->hardware_lock supposed to be held on entry */
 496 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 497 {
 498         struct qla_hw_data *ha = vha->hw;
 499         struct qla_tgt_sess *sess = NULL;
 500         uint32_t unpacked_lun, lun = 0;
 501         uint16_t loop_id;
 502         int res = 0;
 503         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 504         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 505
 506         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 507         if (loop_id == 0xFFFF) {
 508                 /* Global event */
 509                 atomic_inc(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
 510                 qlt_clear_tgt_db(vha->vha_tgt.qla_tgt);
 511 #if 0 /* FIXME: do we need to choose a session here? */
 512                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 513                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 514                             typeof(*sess), sess_list_entry);
 515                         switch (mcmd) {
 516                         case QLA_TGT_NEXUS_LOSS_SESS:
 517                                 mcmd = QLA_TGT_NEXUS_LOSS;
 518                                 break;
 519                         case QLA_TGT_ABORT_ALL_SESS:
 520                                 mcmd = QLA_TGT_ABORT_ALL;
 521                                 break;
 522                         case QLA_TGT_NEXUS_LOSS:
 523                         case QLA_TGT_ABORT_ALL:
 524                                 break;
 525                         default:
 526                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 527                                     "qla_target(%d): Not allowed "
 528                                     "command %x in %s", vha->vp_idx,
 529                                     mcmd, __func__);
 530                                 sess = NULL;
 531                                 break;
 532                         }
 533                 } else
 534                         sess = NULL;
 535 #endif
 536         } else {
 537                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 538         }
 539
 540         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 541             "Using sess for qla_tgt_reset: %p\n", sess);
 542         if (!sess) {
 543                 res = -ESRCH;
 544                 return res;
 545         }
 546
 547         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 548             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 549             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 550             mcmd, loop_id);
 551
 552         lun = a->u.isp24.fcp_cmnd.lun;
 553         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 554
 555         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 556             iocb, QLA24XX_MGMT_SEND_NACK);
 557 }
 558
 559 /* ha->hardware_lock supposed to be held on entry */
 560 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 561         bool immediate)
 562 {
 563         struct qla_tgt *tgt = sess->tgt;
 564         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 565
 566         if (sess->deleted) {
 567                 /* Upgrade to unconditional deletion in case it was temporary */
 568                 if (immediate && sess->deleted == QLA_SESS_DELETION_PENDING)
 569                         list_del(&sess->del_list_entry);
 570                 else
 571                         return;
 572         }
 573
 574         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 575             "Scheduling sess %p for deletion\n", sess);
 576
 577         if (immediate) {
 578                 dev_loss_tmo = 0;
 579                 sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 580                 list_add(&sess->del_list_entry, &tgt->del_sess_list);
 581         } else {
 582                 sess->deleted = QLA_SESS_DELETION_PENDING;
 583                 list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 584         }
 585
 586         sess->expires = jiffies + dev_loss_tmo * HZ;
 587
 588         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 589             "qla_target(%d): session for port %8phC (loop ID %d s_id %02x:%02x:%02x)"
 590             " scheduled for deletion in %u secs (expires: %lu) immed: %d, logout: %d, gen: %#x\n",
 591             sess->vha->vp_idx, sess->port_name, sess->loop_id,
 592             sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
 593             dev_loss_tmo, sess->expires, immediate, sess->logout_on_delete,
 594             sess->generation);
 595
 596         if (immediate)
 597                 mod_delayed_work(system_wq, &tgt->sess_del_work, 0);
 598         else
 599                 schedule_delayed_work(&tgt->sess_del_work,
 600                     sess->expires - jiffies);
 601 }
 602
 603 /* ha->hardware_lock supposed to be held on entry */
 604 static void qlt_clear_tgt_db(struct qla_tgt *tgt)
 605 {
 606         struct qla_tgt_sess *sess;
 607
 608         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 609                 qlt_schedule_sess_for_deletion(sess, true);
 610
 611         /* At this point tgt could be already dead */
 612 }
 613
 614 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 615         uint16_t *loop_id)
 616 {
 617         struct qla_hw_data *ha = vha->hw;
 618         dma_addr_t gid_list_dma;
 619         struct gid_list_info *gid_list;
 620         char *id_iter;
 621         int res, rc, i;
 622         uint16_t entries;
 623
 624         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 625             &gid_list_dma, GFP_KERNEL);
 626         if (!gid_list) {
 627                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 628                     "qla_target(%d): DMA Alloc failed of %u\n",
 629                     vha->vp_idx, qla2x00_gid_list_size(ha));
 630                 return -ENOMEM;
 631         }
 632
 633         /* Get list of logged in devices */
 634         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 635         if (rc != QLA_SUCCESS) {
 636                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 637                     "qla_target(%d): get_id_list() failed: %x\n",
 638                     vha->vp_idx, rc);
 639                 res = -1;
 640                 goto out_free_id_list;
 641         }
 642
 643         id_iter = (char *)gid_list;
 644         res = -1;
 645         for (i = 0; i < entries; i++) {
 646                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 647                 if ((gid->al_pa == s_id[2]) &&
 648                     (gid->area == s_id[1]) &&
 649                     (gid->domain == s_id[0])) {
 650                         *loop_id = le16_to_cpu(gid->loop_id);
 651                         res = 0;
 652                         break;
 653                 }
 654                 id_iter += ha->gid_list_info_size;
 655         }
 656
 657 out_free_id_list:
 658         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 659             gid_list, gid_list_dma);
 660         return res;
 661 }
 662
 663 /* ha->hardware_lock supposed to be held on entry */
 664 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 665 {
 666         BUG_ON(sess->deleted != QLA_SESS_DELETION_PENDING);
 667
 668         list_del_init(&sess->del_list_entry);
 669         sess->deleted = 0;
 670 }
 671
 672 static void qlt_del_sess_work_fn(struct delayed_work *work)
 673 {
 674         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 675             sess_del_work);
 676         struct scsi_qla_host *vha = tgt->vha;
 677         struct qla_hw_data *ha = vha->hw;
 678         struct qla_tgt_sess *sess;
 679         unsigned long flags, elapsed;
 680
 681         spin_lock_irqsave(&ha->hardware_lock, flags);
 682         while (!list_empty(&tgt->del_sess_list)) {
 683                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 684                     del_list_entry);
 685                 elapsed = jiffies;
 686                 if (time_after_eq(elapsed, sess->expires)) {
 687                         /* No turning back */
 688                         list_del_init(&sess->del_list_entry);
 689                         sess->deleted = QLA_SESS_DELETION_IN_PROGRESS;
 690
 691                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 692                             "Timeout: sess %p about to be deleted\n",
 693                             sess);
 694                         ha->tgt.tgt_ops->shutdown_sess(sess);
 695                         ha->tgt.tgt_ops->put_sess(sess);
 696                 } else {
 697                         schedule_delayed_work(&tgt->sess_del_work,
 698                             sess->expires - elapsed);
 699                         break;
 700                 }
 701         }
 702         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 703 }
 704
 705 /*
 706  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 707  * Caller must put it.
 708  */
 709 static struct qla_tgt_sess *qlt_create_sess(
 710         struct scsi_qla_host *vha,
 711         fc_port_t *fcport,
 712         bool local)
 713 {
 714         struct qla_hw_data *ha = vha->hw;
 715         struct qla_tgt_sess *sess;
 716         unsigned long flags;
 717         unsigned char be_sid[3];
 718
 719         /* Check to avoid double sessions */
 720         spin_lock_irqsave(&ha->hardware_lock, flags);
 721         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 722                                 sess_list_entry) {
 723                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 724                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 725                             "Double sess %p found (s_id %x:%x:%x, "
 726                             "loop_id %d), updating to d_id %x:%x:%x, "
 727                             "loop_id %d", sess, sess->s_id.b.domain,
 728                             sess->s_id.b.al_pa, sess->s_id.b.area,
 729                             sess->loop_id, fcport->d_id.b.domain,
 730                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 731                             fcport->loop_id);
 732
 733                         /* Cannot undelete at this point */
 734                         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
 735                                 spin_unlock_irqrestore(&ha->hardware_lock,
 736                                     flags);
 737                                 return NULL;
 738                         }
 739
 740                         if (sess->deleted)
 741                                 qlt_undelete_sess(sess);
 742
 743                         kref_get(&sess->se_sess->sess_kref);
 744                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 745                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 746
 747                         if (sess->local && !local)
 748                                 sess->local = 0;
 749
 750                         qlt_do_generation_tick(vha, &sess->generation);
 751
 752                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 753
 754                         return sess;
 755                 }
 756         }
 757         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 758
 759         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 760         if (!sess) {
 761                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 762                     "qla_target(%u): session allocation failed, all commands "
 763                     "from port %8phC will be refused", vha->vp_idx,
 764                     fcport->port_name);
 765
 766                 return NULL;
 767         }
 768         sess->tgt = vha->vha_tgt.qla_tgt;
 769         sess->vha = vha;
 770         sess->s_id = fcport->d_id;
 771         sess->loop_id = fcport->loop_id;
 772         sess->local = local;
 773         INIT_LIST_HEAD(&sess->del_list_entry);
 774
 775         /* Under normal circumstances we want to logout from firmware when
 776          * session eventually ends and release corresponding nport handle.
 777          * In the exception cases (e.g. when new PLOGI is waiting) corresponding
 778          * code will adjust these flags as necessary. */
 779         sess->logout_on_delete = 1;
 780         sess->keep_nport_handle = 0;
 781
 782         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 783             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 784             sess, vha->vha_tgt.qla_tgt);
 785
 786         be_sid[0] = sess->s_id.b.domain;
 787         be_sid[1] = sess->s_id.b.area;
 788         be_sid[2] = sess->s_id.b.al_pa;
 789         /*
 790          * Determine if this fc_port->port_name is allowed to access
 791          * target mode using explict NodeACLs+MappedLUNs, or using
 792          * TPG demo mode.  If this is successful a target mode FC nexus
 793          * is created.
 794          */
 795         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 796             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 797                 kfree(sess);
 798                 return NULL;
 799         }
 800         /*
 801          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 802          * access across ->hardware_lock reaquire.
 803          */
 804         kref_get(&sess->se_sess->sess_kref);
 805
 806         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 807         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 808         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 809
 810         spin_lock_irqsave(&ha->hardware_lock, flags);
 811         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 812         vha->vha_tgt.qla_tgt->sess_count++;
 813         qlt_do_generation_tick(vha, &sess->generation);
 814         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 815
 816         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 817             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 818             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 819             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 820             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 821             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 822
 823         return sess;
 824 }
 825
 826 /*
 827  * Called from qla2x00_reg_remote_port()
 828  */
 829 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 830 {
 831         struct qla_hw_data *ha = vha->hw;
 832         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 833         struct qla_tgt_sess *sess;
 834         unsigned long flags;
 835
 836         if (!vha->hw->tgt.tgt_ops)
 837                 return;
 838
 839         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 840                 return;
 841
 842         if (qla_ini_mode_enabled(vha))
 843                 return;
 844
 845         spin_lock_irqsave(&ha->hardware_lock, flags);
 846         if (tgt->tgt_stop) {
 847                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 848                 return;
 849         }
 850         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 851         if (!sess) {
 852                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 853
 854                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 855                 sess = qlt_create_sess(vha, fcport, false);
 856                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 857
 858                 spin_lock_irqsave(&ha->hardware_lock, flags);
 859         } else if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
 860                 /* Point of no return */
 861                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 862                 return;
 863         } else {
 864                 kref_get(&sess->se_sess->sess_kref);
 865
 866                 if (sess->deleted) {
 867                         qlt_undelete_sess(sess);
 868
 869                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 870                             "qla_target(%u): %ssession for port %8phC "
 871                             "(loop ID %d) reappeared\n", vha->vp_idx,
 872                             sess->local ? "local " : "", sess->port_name,
 873                             sess->loop_id);
 874
 875                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 876                             "Reappeared sess %p\n", sess);
 877                 }
 878                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 879                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 880         }
 881
 882         if (sess && sess->local) {
 883                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 884                     "qla_target(%u): local session for "
 885                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 886                     fcport->port_name, sess->loop_id);
 887                 sess->local = 0;
 888         }
 889         ha->tgt.tgt_ops->put_sess(sess);
 890         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 891 }
 892
 893 /*
 894  * max_gen - specifies maximum session generation
 895  * at which this deletion requestion is still valid
 896  */
 897 void
 898 qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport, int max_gen)
 899 {
 900         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 901         struct qla_tgt_sess *sess;
 902
 903         if (!vha->hw->tgt.tgt_ops)
 904                 return;
 905
 906         if (!tgt)
 907                 return;
 908
 909         if (tgt->tgt_stop) {
 910                 return;
 911         }
 912         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 913         if (!sess) {
 914                 return;
 915         }
 916
 917         if (max_gen - sess->generation < 0) {
 918                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf092,
 919                     "Ignoring stale deletion request for se_sess %p / sess %p"
 920                     " for port %8phC, req_gen %d, sess_gen %d\n",
 921                     sess->se_sess, sess, sess->port_name, max_gen,
 922                     sess->generation);
 923                 return;
 924         }
 925
 926         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 927
 928         sess->local = 1;
 929         qlt_schedule_sess_for_deletion(sess, false);
 930 }
 931
 932 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 933 {
 934         struct qla_hw_data *ha = tgt->ha;
 935         unsigned long flags;
 936         int res;
 937         /*
 938          * We need to protect against race, when tgt is freed before or
 939          * inside wake_up()
 940          */
 941         spin_lock_irqsave(&ha->hardware_lock, flags);
 942         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 943             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 944             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 945         res = (tgt->sess_count == 0);
 946         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 947
 948         return res;
 949 }
 950
 951 /* Called by tcm_qla2xxx configfs code */
 952 int qlt_stop_phase1(struct qla_tgt *tgt)
 953 {
 954         struct scsi_qla_host *vha = tgt->vha;
 955         struct qla_hw_data *ha = tgt->ha;
 956         unsigned long flags;
 957
 958         mutex_lock(&qla_tgt_mutex);
 959         if (!vha->fc_vport) {
 960                 struct Scsi_Host *sh = vha->host;
 961                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
 962                 bool npiv_vports;
 963
 964                 spin_lock_irqsave(sh->host_lock, flags);
 965                 npiv_vports = (fc_host->npiv_vports_inuse);
 966                 spin_unlock_irqrestore(sh->host_lock, flags);
 967
 968                 if (npiv_vports) {
 969                         mutex_unlock(&qla_tgt_mutex);
 970                         return -EPERM;
 971                 }
 972         }
 973         if (tgt->tgt_stop || tgt->tgt_stopped) {
 974                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 975                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 976                 mutex_unlock(&qla_tgt_mutex);
 977                 return -EPERM;
 978         }
 979
 980         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 981             vha->host_no, vha);
 982         /*
 983          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 984          * Lock is needed, because we still can get an incoming packet.
 985          */
 986         mutex_lock(&vha->vha_tgt.tgt_mutex);
 987         spin_lock_irqsave(&ha->hardware_lock, flags);
 988         tgt->tgt_stop = 1;
 989         qlt_clear_tgt_db(tgt);
 990         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 991         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 992         mutex_unlock(&qla_tgt_mutex);
 993
 994         flush_delayed_work(&tgt->sess_del_work);
 995
 996         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 997             "Waiting for sess works (tgt %p)", tgt);
 998         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 999         while (!list_empty(&tgt->sess_works_list)) {
1000                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1001                 flush_scheduled_work();
1002                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
1003         }
1004         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1005
1006         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
1007             "Waiting for tgt %p: list_empty(sess_list)=%d "
1008             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
1009             tgt->sess_count);
1010
1011         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1012
1013         /* Big hammer */
1014         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
1015                 qlt_disable_vha(vha);
1016
1017         /* Wait for sessions to clear out (just in case) */
1018         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
1019         return 0;
1020 }
1021 EXPORT_SYMBOL(qlt_stop_phase1);
1022
1023 /* Called by tcm_qla2xxx configfs code */
1024 void qlt_stop_phase2(struct qla_tgt *tgt)
1025 {
1026         struct qla_hw_data *ha = tgt->ha;
1027         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1028         unsigned long flags;
1029
1030         if (tgt->tgt_stopped) {
1031                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
1032                     "Already in tgt->tgt_stopped state\n");
1033                 dump_stack();
1034                 return;
1035         }
1036
1037         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
1038             "Waiting for %d IRQ commands to complete (tgt %p)",
1039             tgt->irq_cmd_count, tgt);
1040
1041         mutex_lock(&vha->vha_tgt.tgt_mutex);
1042         spin_lock_irqsave(&ha->hardware_lock, flags);
1043         while (tgt->irq_cmd_count != 0) {
1044                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1045                 udelay(2);
1046                 spin_lock_irqsave(&ha->hardware_lock, flags);
1047         }
1048         tgt->tgt_stop = 0;
1049         tgt->tgt_stopped = 1;
1050         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1051         mutex_unlock(&vha->vha_tgt.tgt_mutex);
1052
1053         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
1054             tgt);
1055 }
1056 EXPORT_SYMBOL(qlt_stop_phase2);
1057
1058 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1059 static void qlt_release(struct qla_tgt *tgt)
1060 {
1061         scsi_qla_host_t *vha = tgt->vha;
1062
1063         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1064                 qlt_stop_phase2(tgt);
1065
1066         vha->vha_tgt.qla_tgt = NULL;
1067
1068         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
1069             "Release of tgt %p finished\n", tgt);
1070
1071         kfree(tgt);
1072 }
1073
1074 /* ha->hardware_lock supposed to be held on entry */
1075 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1076         const void *param, unsigned int param_size)
1077 {
1078         struct qla_tgt_sess_work_param *prm;
1079         unsigned long flags;
1080
1081         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1082         if (!prm) {
1083                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1084                     "qla_target(%d): Unable to create session "
1085                     "work, command will be refused", 0);
1086                 return -ENOMEM;
1087         }
1088
1089         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1090             "Scheduling work (type %d, prm %p)"
1091             " to find session for param %p (size %d, tgt %p)\n",
1092             type, prm, param, param_size, tgt);
1093
1094         prm->type = type;
1095         memcpy(&prm->tm_iocb, param, param_size);
1096
1097         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1098         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1099         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1100
1101         schedule_work(&tgt->sess_work);
1102
1103         return 0;
1104 }
1105
1106 /*
1107  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1108  */
1109 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1110         struct imm_ntfy_from_isp *ntfy,
1111         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1112         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1113 {
1114         struct qla_hw_data *ha = vha->hw;
1115         request_t *pkt;
1116         struct nack_to_isp *nack;
1117
1118         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1119
1120         /* Send marker if required */
1121         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1122                 return;
1123
1124         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1125         if (!pkt) {
1126                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1127                     "qla_target(%d): %s failed: unable to allocate "
1128                     "request packet\n", vha->vp_idx, __func__);
1129                 return;
1130         }
1131
1132         if (vha->vha_tgt.qla_tgt != NULL)
1133                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1134
1135         pkt->entry_type = NOTIFY_ACK_TYPE;
1136         pkt->entry_count = 1;
1137
1138         nack = (struct nack_to_isp *)pkt;
1139         nack->ox_id = ntfy->ox_id;
1140
1141         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1142         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1143                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1144                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1145         }
1146         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1147         nack->u.isp24.status = ntfy->u.isp24.status;
1148         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1149         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1150         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1151         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1152         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1153         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1154         nack->u.isp24.srr_reject_code = srr_reject_code;
1155         nack->u.isp24.srr_reject_code_expl = srr_explan;
1156         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1157
1158         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1159             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1160             vha->vp_idx, nack->u.isp24.status);
1161
1162         /* Memory Barrier */
1163         wmb();
1164         qla2x00_start_iocbs(vha, vha->req);
1165 }
1166
1167 /*
1168  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1169  */
1170 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1171         struct abts_recv_from_24xx *abts, uint32_t status,
1172         bool ids_reversed)
1173 {
1174         struct qla_hw_data *ha = vha->hw;
1175         struct abts_resp_to_24xx *resp;
1176         uint32_t f_ctl;
1177         uint8_t *p;
1178
1179         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1180             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1181             ha, abts, status);
1182
1183         /* Send marker if required */
1184         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1185                 return;
1186
1187         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1188         if (!resp) {
1189                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1190                     "qla_target(%d): %s failed: unable to allocate "
1191                     "request packet", vha->vp_idx, __func__);
1192                 return;
1193         }
1194
1195         resp->entry_type = ABTS_RESP_24XX;
1196         resp->entry_count = 1;
1197         resp->nport_handle = abts->nport_handle;
1198         resp->vp_index = vha->vp_idx;
1199         resp->sof_type = abts->sof_type;
1200         resp->exchange_address = abts->exchange_address;
1201         resp->fcp_hdr_le = abts->fcp_hdr_le;
1202         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1203             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1204             F_CTL_SEQ_INITIATIVE);
1205         p = (uint8_t *)&f_ctl;
1206         resp->fcp_hdr_le.f_ctl[0] = *p++;
1207         resp->fcp_hdr_le.f_ctl[1] = *p++;
1208         resp->fcp_hdr_le.f_ctl[2] = *p;
1209         if (ids_reversed) {
1210                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1211                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1212                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1213                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1214                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1215                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1216         } else {
1217                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1218                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1219                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1220                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1221                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1222                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1223         }
1224         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1225         if (status == FCP_TMF_CMPL) {
1226                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1227                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1228                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1229                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1230                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1231                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1232         } else {
1233                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1234                 resp->payload.ba_rjt.reason_code =
1235                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1236                 /* Other bytes are zero */
1237         }
1238
1239         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1240
1241         /* Memory Barrier */
1242         wmb();
1243         qla2x00_start_iocbs(vha, vha->req);
1244 }
1245
1246 /*
1247  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1248  */
1249 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1250         struct abts_resp_from_24xx_fw *entry)
1251 {
1252         struct ctio7_to_24xx *ctio;
1253
1254         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1255             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1256         /* Send marker if required */
1257         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1258                 return;
1259
1260         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1261         if (ctio == NULL) {
1262                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1263                     "qla_target(%d): %s failed: unable to allocate "
1264                     "request packet\n", vha->vp_idx, __func__);
1265                 return;
1266         }
1267
1268         /*
1269          * We've got on entrance firmware's response on by us generated
1270          * ABTS response. So, in it ID fields are reversed.
1271          */
1272
1273         ctio->entry_type = CTIO_TYPE7;
1274         ctio->entry_count = 1;
1275         ctio->nport_handle = entry->nport_handle;
1276         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1277         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1278         ctio->vp_index = vha->vp_idx;
1279         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1280         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1281         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1282         ctio->exchange_addr = entry->exchange_addr_to_abort;
1283         ctio->u.status1.flags =
1284             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1285                 CTIO7_FLAGS_TERMINATE);
1286         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1287
1288         /* Memory Barrier */
1289         wmb();
1290         qla2x00_start_iocbs(vha, vha->req);
1291
1292         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1293             FCP_TMF_CMPL, true);
1294 }
1295
1296 static int abort_cmd_for_tag(struct scsi_qla_host *vha, uint32_t tag)
1297 {
1298         struct qla_tgt_sess_op *op;
1299         struct qla_tgt_cmd *cmd;
1300
1301         spin_lock(&vha->cmd_list_lock);
1302
1303         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1304                 if (tag == op->atio.u.isp24.exchange_addr) {
1305                         op->aborted = true;
1306                         spin_unlock(&vha->cmd_list_lock);
1307                         return 1;
1308                 }
1309         }
1310
1311         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1312                 if (tag == cmd->atio.u.isp24.exchange_addr) {
1313                         cmd->state = QLA_TGT_STATE_ABORTED;
1314                         spin_unlock(&vha->cmd_list_lock);
1315                         return 1;
1316                 }
1317         }
1318
1319         spin_unlock(&vha->cmd_list_lock);
1320         return 0;
1321 }
1322
1323 /* drop cmds for the given lun
1324  * XXX only looks for cmds on the port through which lun reset was recieved
1325  * XXX does not go through the list of other port (which may have cmds
1326  *     for the same lun)
1327  */
1328 static void abort_cmds_for_lun(struct scsi_qla_host *vha,
1329                                 uint32_t lun, uint8_t *s_id)
1330 {
1331         struct qla_tgt_sess_op *op;
1332         struct qla_tgt_cmd *cmd;
1333         uint32_t key;
1334
1335         key = sid_to_key(s_id);
1336         spin_lock(&vha->cmd_list_lock);
1337         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
1338                 uint32_t op_key;
1339                 uint32_t op_lun;
1340
1341                 op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
1342                 op_lun = scsilun_to_int(
1343                         (struct scsi_lun *)&op->atio.u.isp24.fcp_cmnd.lun);
1344                 if (op_key == key && op_lun == lun)
1345                         op->aborted = true;
1346         }
1347         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
1348                 uint32_t cmd_key;
1349                 uint32_t cmd_lun;
1350
1351                 cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
1352                 cmd_lun = scsilun_to_int(
1353                         (struct scsi_lun *)&cmd->atio.u.isp24.fcp_cmnd.lun);
1354                 if (cmd_key == key && cmd_lun == lun)
1355                         cmd->state = QLA_TGT_STATE_ABORTED;
1356         }
1357         spin_unlock(&vha->cmd_list_lock);
1358 }
1359
1360 /* ha->hardware_lock supposed to be held on entry */
1361 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1362         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1363 {
1364         struct qla_hw_data *ha = vha->hw;
1365         struct se_session *se_sess = sess->se_sess;
1366         struct qla_tgt_mgmt_cmd *mcmd;
1367         struct se_cmd *se_cmd;
1368         u32 lun = 0;
1369         int rc;
1370         bool found_lun = false;
1371
1372         spin_lock(&se_sess->sess_cmd_lock);
1373         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1374                 struct qla_tgt_cmd *cmd =
1375                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1376                 if (se_cmd->tag == abts->exchange_addr_to_abort) {
1377                         lun = cmd->unpacked_lun;
1378                         found_lun = true;
1379                         break;
1380                 }
1381         }
1382         spin_unlock(&se_sess->sess_cmd_lock);
1383
1384         /* cmd not in LIO lists, look in qla list */
1385         if (!found_lun) {
1386                 if (abort_cmd_for_tag(vha, abts->exchange_addr_to_abort)) {
1387                         /* send TASK_ABORT response immediately */
1388                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_CMPL, false);
1389                         return 0;
1390                 } else {
1391                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf081,
1392                             "unable to find cmd in driver or LIO for tag 0x%x\n",
1393                             abts->exchange_addr_to_abort);
1394                         return -ENOENT;
1395                 }
1396         }
1397
1398         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1399             "qla_target(%d): task abort (tag=%d)\n",
1400             vha->vp_idx, abts->exchange_addr_to_abort);
1401
1402         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1403         if (mcmd == NULL) {
1404                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1405                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1406                     vha->vp_idx, __func__);
1407                 return -ENOMEM;
1408         }
1409         memset(mcmd, 0, sizeof(*mcmd));
1410
1411         mcmd->sess = sess;
1412         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1413         mcmd->reset_count = vha->hw->chip_reset;
1414
1415         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1416             abts->exchange_addr_to_abort);
1417         if (rc != 0) {
1418                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1419                     "qla_target(%d):  tgt_ops->handle_tmr()"
1420                     " failed: %d", vha->vp_idx, rc);
1421                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1422                 return -EFAULT;
1423         }
1424
1425         return 0;
1426 }
1427
1428 /*
1429  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1430  */
1431 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1432         struct abts_recv_from_24xx *abts)
1433 {
1434         struct qla_hw_data *ha = vha->hw;
1435         struct qla_tgt_sess *sess;
1436         uint32_t tag = abts->exchange_addr_to_abort;
1437         uint8_t s_id[3];
1438         int rc;
1439
1440         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1441                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1442                     "qla_target(%d): ABTS: Abort Sequence not "
1443                     "supported\n", vha->vp_idx);
1444                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1445                 return;
1446         }
1447
1448         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1449                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1450                     "qla_target(%d): ABTS: Unknown Exchange "
1451                     "Address received\n", vha->vp_idx);
1452                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1453                 return;
1454         }
1455
1456         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1457             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1458             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1459             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1460             le32_to_cpu(abts->fcp_hdr_le.parameter));
1461
1462         s_id[0] = abts->fcp_hdr_le.s_id[2];
1463         s_id[1] = abts->fcp_hdr_le.s_id[1];
1464         s_id[2] = abts->fcp_hdr_le.s_id[0];
1465
1466         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1467         if (!sess) {
1468                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1469                     "qla_target(%d): task abort for non-existant session\n",
1470                     vha->vp_idx);
1471                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1472                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1473                 if (rc != 0) {
1474                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1475                             false);
1476                 }
1477                 return;
1478         }
1479
1480         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
1481                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1482                 return;
1483         }
1484
1485         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1486         if (rc != 0) {
1487                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1488                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1489                     vha->vp_idx, rc);
1490                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1491                 return;
1492         }
1493 }
1494
1495 /*
1496  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1497  */
1498 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1499         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1500 {
1501         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1502         struct ctio7_to_24xx *ctio;
1503         uint16_t temp;
1504
1505         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1506             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1507             ha, atio, resp_code);
1508
1509         /* Send marker if required */
1510         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1511                 return;
1512
1513         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1514         if (ctio == NULL) {
1515                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1516                     "qla_target(%d): %s failed: unable to allocate "
1517                     "request packet\n", ha->vp_idx, __func__);
1518                 return;
1519         }
1520
1521         ctio->entry_type = CTIO_TYPE7;
1522         ctio->entry_count = 1;
1523         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1524         ctio->nport_handle = mcmd->sess->loop_id;
1525         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1526         ctio->vp_index = ha->vp_idx;
1527         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1528         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1529         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1530         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1531         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1532             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1533                 CTIO7_FLAGS_SEND_STATUS);
1534         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1535         ctio->u.status1.ox_id = cpu_to_le16(temp);
1536         ctio->u.status1.scsi_status =
1537             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1538         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1539         ctio->u.status1.sense_data[0] = resp_code;
1540
1541         /* Memory Barrier */
1542         wmb();
1543         qla2x00_start_iocbs(ha, ha->req);
1544 }
1545
1546 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1547 {
1548         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1549 }
1550 EXPORT_SYMBOL(qlt_free_mcmd);
1551
1552 /* callback from target fabric module code */
1553 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1554 {
1555         struct scsi_qla_host *vha = mcmd->sess->vha;
1556         struct qla_hw_data *ha = vha->hw;
1557         unsigned long flags;
1558
1559         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1560             "TM response mcmd (%p) status %#x state %#x",
1561             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1562
1563         spin_lock_irqsave(&ha->hardware_lock, flags);
1564
1565         if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1566                 /*
1567                  * Either a chip reset is active or this request was from
1568                  * previous life, just abort the processing.
1569                  */
1570                 ql_dbg(ql_dbg_async, vha, 0xe100,
1571                         "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1572                         qla2x00_reset_active(vha), mcmd->reset_count,
1573                         ha->chip_reset);
1574                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1575                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1576                 return;
1577         }
1578
1579         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1580                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1581                     0, 0, 0, 0, 0, 0);
1582         else {
1583                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1584                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1585                             mcmd->fc_tm_rsp, false);
1586                 else
1587                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1588                             mcmd->fc_tm_rsp);
1589         }
1590         /*
1591          * Make the callback for ->free_mcmd() to queue_work() and invoke
1592          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1593          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1594          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1595          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1596          * qlt_xmit_tm_rsp() returns here..
1597          */
1598         ha->tgt.tgt_ops->free_mcmd(mcmd);
1599         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1600 }
1601 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1602
1603 /* No locks */
1604 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1605 {
1606         struct qla_tgt_cmd *cmd = prm->cmd;
1607
1608         BUG_ON(cmd->sg_cnt == 0);
1609
1610         prm->sg = (struct scatterlist *)cmd->sg;
1611         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1612             cmd->sg_cnt, cmd->dma_data_direction);
1613         if (unlikely(prm->seg_cnt == 0))
1614                 goto out_err;
1615
1616         prm->cmd->sg_mapped = 1;
1617
1618         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1619                 /*
1620                  * If greater than four sg entries then we need to allocate
1621                  * the continuation entries
1622                  */
1623                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1624                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1625                         prm->tgt->datasegs_per_cmd,
1626                         prm->tgt->datasegs_per_cont);
1627         } else {
1628                 /* DIF */
1629                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1630                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1631                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1632                         prm->tot_dsds = prm->seg_cnt;
1633                 } else
1634                         prm->tot_dsds = prm->seg_cnt;
1635
1636                 if (cmd->prot_sg_cnt) {
1637                         prm->prot_sg      = cmd->prot_sg;
1638                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1639                                 cmd->prot_sg, cmd->prot_sg_cnt,
1640                                 cmd->dma_data_direction);
1641                         if (unlikely(prm->prot_seg_cnt == 0))
1642                                 goto out_err;
1643
1644                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1645                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1646                                 /* Dif Bundling not support here */
1647                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1648                                                                 cmd->blk_sz);
1649                                 prm->tot_dsds += prm->prot_seg_cnt;
1650                         } else
1651                                 prm->tot_dsds += prm->prot_seg_cnt;
1652                 }
1653         }
1654
1655         return 0;
1656
1657 out_err:
1658         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1659             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1660             0, prm->cmd->sg_cnt);
1661         return -1;
1662 }
1663
1664 static void qlt_unmap_sg(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
1665 {
1666         struct qla_hw_data *ha = vha->hw;
1667
1668         if (!cmd->sg_mapped)
1669                 return;
1670
1671         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1672         cmd->sg_mapped = 0;
1673
1674         if (cmd->prot_sg_cnt)
1675                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1676                         cmd->dma_data_direction);
1677
1678         if (cmd->ctx_dsd_alloced)
1679                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1680
1681         if (cmd->ctx)
1682                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1683 }
1684
1685 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1686         uint32_t req_cnt)
1687 {
1688         uint32_t cnt, cnt_in;
1689
1690         if (vha->req->cnt < (req_cnt + 2)) {
1691                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1692                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1693
1694                 if  (vha->req->ring_index < cnt)
1695                         vha->req->cnt = cnt - vha->req->ring_index;
1696                 else
1697                         vha->req->cnt = vha->req->length -
1698                             (vha->req->ring_index - cnt);
1699         }
1700
1701         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1702                 ql_dbg(ql_dbg_io, vha, 0x305a,
1703                     "qla_target(%d): There is no room in the request ring: vha->req->ring_index=%d, vha->req->cnt=%d, req_cnt=%d Req-out=%d Req-in=%d Req-Length=%d\n",
1704                     vha->vp_idx, vha->req->ring_index,
1705                     vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1706                 return -EAGAIN;
1707         }
1708         vha->req->cnt -= req_cnt;
1709
1710         return 0;
1711 }
1712
1713 /*
1714  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1715  */
1716 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1717 {
1718         /* Adjust ring index. */
1719         vha->req->ring_index++;
1720         if (vha->req->ring_index == vha->req->length) {
1721                 vha->req->ring_index = 0;
1722                 vha->req->ring_ptr = vha->req->ring;
1723         } else {
1724                 vha->req->ring_ptr++;
1725         }
1726         return (cont_entry_t *)vha->req->ring_ptr;
1727 }
1728
1729 /* ha->hardware_lock supposed to be held on entry */
1730 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1731 {
1732         struct qla_hw_data *ha = vha->hw;
1733         uint32_t h;
1734
1735         h = ha->tgt.current_handle;
1736         /* always increment cmd handle */
1737         do {
1738                 ++h;
1739                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1740                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1741                 if (h == ha->tgt.current_handle) {
1742                         ql_dbg(ql_dbg_io, vha, 0x305b,
1743                             "qla_target(%d): Ran out of "
1744                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1745                         h = QLA_TGT_NULL_HANDLE;
1746                         break;
1747                 }
1748         } while ((h == QLA_TGT_NULL_HANDLE) ||
1749             (h == QLA_TGT_SKIP_HANDLE) ||
1750             (ha->tgt.cmds[h-1] != NULL));
1751
1752         if (h != QLA_TGT_NULL_HANDLE)
1753                 ha->tgt.current_handle = h;
1754
1755         return h;
1756 }
1757
1758 /* ha->hardware_lock supposed to be held on entry */
1759 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1760         struct scsi_qla_host *vha)
1761 {
1762         uint32_t h;
1763         struct ctio7_to_24xx *pkt;
1764         struct qla_hw_data *ha = vha->hw;
1765         struct atio_from_isp *atio = &prm->cmd->atio;
1766         uint16_t temp;
1767
1768         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1769         prm->pkt = pkt;
1770         memset(pkt, 0, sizeof(*pkt));
1771
1772         pkt->entry_type = CTIO_TYPE7;
1773         pkt->entry_count = (uint8_t)prm->req_cnt;
1774         pkt->vp_index = vha->vp_idx;
1775
1776         h = qlt_make_handle(vha);
1777         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1778                 /*
1779                  * CTIO type 7 from the firmware doesn't provide a way to
1780                  * know the initiator's LOOP ID, hence we can't find
1781                  * the session and, so, the command.
1782                  */
1783                 return -EAGAIN;
1784         } else
1785                 ha->tgt.cmds[h-1] = prm->cmd;
1786
1787         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1788         pkt->nport_handle = prm->cmd->loop_id;
1789         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1790         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1791         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1792         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1793         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1794         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1795         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1796         pkt->u.status0.ox_id = cpu_to_le16(temp);
1797         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1798
1799         return 0;
1800 }
1801
1802 /*
1803  * ha->hardware_lock supposed to be held on entry. We have already made sure
1804  * that there is sufficient amount of request entries to not drop it.
1805  */
1806 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1807         struct scsi_qla_host *vha)
1808 {
1809         int cnt;
1810         uint32_t *dword_ptr;
1811         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1812
1813         /* Build continuation packets */
1814         while (prm->seg_cnt > 0) {
1815                 cont_a64_entry_t *cont_pkt64 =
1816                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1817
1818                 /*
1819                  * Make sure that from cont_pkt64 none of
1820                  * 64-bit specific fields used for 32-bit
1821                  * addressing. Cast to (cont_entry_t *) for
1822                  * that.
1823                  */
1824
1825                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1826
1827                 cont_pkt64->entry_count = 1;
1828                 cont_pkt64->sys_define = 0;
1829
1830                 if (enable_64bit_addressing) {
1831                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1832                         dword_ptr =
1833                             (uint32_t *)&cont_pkt64->dseg_0_address;
1834                 } else {
1835                         cont_pkt64->entry_type = CONTINUE_TYPE;
1836                         dword_ptr =
1837                             (uint32_t *)&((cont_entry_t *)
1838                                 cont_pkt64)->dseg_0_address;
1839                 }
1840
1841                 /* Load continuation entry data segments */
1842                 for (cnt = 0;
1843                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1844                     cnt++, prm->seg_cnt--) {
1845                         *dword_ptr++ =
1846                             cpu_to_le32(pci_dma_lo32
1847                                 (sg_dma_address(prm->sg)));
1848                         if (enable_64bit_addressing) {
1849                                 *dword_ptr++ =
1850                                     cpu_to_le32(pci_dma_hi32
1851                                         (sg_dma_address
1852                                         (prm->sg)));
1853                         }
1854                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1855
1856                         prm->sg = sg_next(prm->sg);
1857                 }
1858         }
1859 }
1860
1861 /*
1862  * ha->hardware_lock supposed to be held on entry. We have already made sure
1863  * that there is sufficient amount of request entries to not drop it.
1864  */
1865 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1866         struct scsi_qla_host *vha)
1867 {
1868         int cnt;
1869         uint32_t *dword_ptr;
1870         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1871         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1872
1873         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1874
1875         /* Setup packet address segment pointer */
1876         dword_ptr = pkt24->u.status0.dseg_0_address;
1877
1878         /* Set total data segment count */
1879         if (prm->seg_cnt)
1880                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1881
1882         if (prm->seg_cnt == 0) {
1883                 /* No data transfer */
1884                 *dword_ptr++ = 0;
1885                 *dword_ptr = 0;
1886                 return;
1887         }
1888
1889         /* If scatter gather */
1890
1891         /* Load command entry data segments */
1892         for (cnt = 0;
1893             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1894             cnt++, prm->seg_cnt--) {
1895                 *dword_ptr++ =
1896                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1897                 if (enable_64bit_addressing) {
1898                         *dword_ptr++ =
1899                             cpu_to_le32(pci_dma_hi32(
1900                                 sg_dma_address(prm->sg)));
1901                 }
1902                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1903
1904                 prm->sg = sg_next(prm->sg);
1905         }
1906
1907         qlt_load_cont_data_segments(prm, vha);
1908 }
1909
1910 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1911 {
1912         return cmd->bufflen > 0;
1913 }
1914
1915 /*
1916  * Called without ha->hardware_lock held
1917  */
1918 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1919         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1920         uint32_t *full_req_cnt)
1921 {
1922         struct qla_tgt *tgt = cmd->tgt;
1923         struct scsi_qla_host *vha = tgt->vha;
1924         struct qla_hw_data *ha = vha->hw;
1925         struct se_cmd *se_cmd = &cmd->se_cmd;
1926
1927         prm->cmd = cmd;
1928         prm->tgt = tgt;
1929         prm->rq_result = scsi_status;
1930         prm->sense_buffer = &cmd->sense_buffer[0];
1931         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1932         prm->sg = NULL;
1933         prm->seg_cnt = -1;
1934         prm->req_cnt = 1;
1935         prm->add_status_pkt = 0;
1936
1937         /* Send marker if required */
1938         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1939                 return -EFAULT;
1940
1941         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1942                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1943                         return -EAGAIN;
1944         }
1945
1946         *full_req_cnt = prm->req_cnt;
1947
1948         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1949                 prm->residual = se_cmd->residual_count;
1950                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1951                     "Residual underflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1952                        prm->residual, se_cmd->tag,
1953                        se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1954                        cmd->bufflen, prm->rq_result);
1955                 prm->rq_result |= SS_RESIDUAL_UNDER;
1956         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1957                 prm->residual = se_cmd->residual_count;
1958                 ql_dbg(ql_dbg_io, vha, 0x305d,
1959                     "Residual overflow: %d (tag %lld, op %x, bufflen %d, rq_result %x)\n",
1960                        prm->residual, se_cmd->tag, se_cmd->t_task_cdb ?
1961                        se_cmd->t_task_cdb[0] : 0, cmd->bufflen, prm->rq_result);
1962                 prm->rq_result |= SS_RESIDUAL_OVER;
1963         }
1964
1965         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1966                 /*
1967                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1968                  * ignored in *xmit_response() below
1969                  */
1970                 if (qlt_has_data(cmd)) {
1971                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1972                             (IS_FWI2_CAPABLE(ha) &&
1973                             (prm->rq_result != 0))) {
1974                                 prm->add_status_pkt = 1;
1975                                 (*full_req_cnt)++;
1976                         }
1977                 }
1978         }
1979
1980         return 0;
1981 }
1982
1983 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1984         struct qla_tgt_cmd *cmd, int sending_sense)
1985 {
1986         if (ha->tgt.enable_class_2)
1987                 return 0;
1988
1989         if (sending_sense)
1990                 return cmd->conf_compl_supported;
1991         else
1992                 return ha->tgt.enable_explicit_conf &&
1993                     cmd->conf_compl_supported;
1994 }
1995
1996 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1997 /*
1998  *  Original taken from the XFS code
1999  */
2000 static unsigned long qlt_srr_random(void)
2001 {
2002         static int Inited;
2003         static unsigned long RandomValue;
2004         static DEFINE_SPINLOCK(lock);
2005         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
2006         register long rv;
2007         register long lo;
2008         register long hi;
2009         unsigned long flags;
2010
2011         spin_lock_irqsave(&lock, flags);
2012         if (!Inited) {
2013                 RandomValue = jiffies;
2014                 Inited = 1;
2015         }
2016         rv = RandomValue;
2017         hi = rv / 127773;
2018         lo = rv % 127773;
2019         rv = 16807 * lo - 2836 * hi;
2020         if (rv <= 0)
2021                 rv += 2147483647;
2022         RandomValue = rv;
2023         spin_unlock_irqrestore(&lock, flags);
2024         return rv;
2025 }
2026
2027 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2028 {
2029 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
2030         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
2031             == 50) {
2032                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
2033                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
2034                     "Dropping cmd %p (tag %d) status", cmd, se_cmd->tag);
2035         }
2036 #endif
2037         /*
2038          * It's currently not possible to simulate SRRs for FCP_WRITE without
2039          * a physical link layer failure, so don't even try here..
2040          */
2041         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
2042                 return;
2043
2044         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
2045             ((qlt_srr_random() % 100) == 20)) {
2046                 int i, leave = 0;
2047                 unsigned int tot_len = 0;
2048
2049                 while (leave == 0)
2050                         leave = qlt_srr_random() % cmd->sg_cnt;
2051
2052                 for (i = 0; i < leave; i++)
2053                         tot_len += cmd->sg[i].length;
2054
2055                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
2056                     "Cutting cmd %p (tag %d) buffer"
2057                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
2058                     " cmd->sg_cnt %d)", cmd, se_cmd->tag, tot_len, leave,
2059                     cmd->bufflen, cmd->sg_cnt);
2060
2061                 cmd->bufflen = tot_len;
2062                 cmd->sg_cnt = leave;
2063         }
2064
2065         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
2066                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
2067
2068                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
2069                     "Cutting cmd %p (tag %d) buffer head "
2070                     "to offset %d (cmd->bufflen %d)", cmd, se_cmd->tag, offset,
2071                     cmd->bufflen);
2072                 if (offset == 0)
2073                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
2074                 else if (qlt_set_data_offset(cmd, offset)) {
2075                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
2076                             "qlt_set_data_offset() failed (tag %d)", se_cmd->tag);
2077                 }
2078         }
2079 }
2080 #else
2081 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
2082 {}
2083 #endif
2084
2085 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
2086         struct qla_tgt_prm *prm)
2087 {
2088         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
2089             (uint32_t)sizeof(ctio->u.status1.sense_data));
2090         ctio->u.status0.flags |=
2091             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
2092         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
2093                 ctio->u.status0.flags |= __constant_cpu_to_le16(
2094                     CTIO7_FLAGS_EXPLICIT_CONFORM |
2095                     CTIO7_FLAGS_CONFORM_REQ);
2096         }
2097         ctio->u.status0.residual = cpu_to_le32(prm->residual);
2098         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
2099         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
2100                 int i;
2101
2102                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
2103                         if (prm->cmd->se_cmd.scsi_status != 0) {
2104                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
2105                                     "Skipping EXPLICIT_CONFORM and "
2106                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
2107                                     "non GOOD status\n");
2108                                 goto skip_explict_conf;
2109                         }
2110                         ctio->u.status1.flags |= __constant_cpu_to_le16(
2111                             CTIO7_FLAGS_EXPLICIT_CONFORM |
2112                             CTIO7_FLAGS_CONFORM_REQ);
2113                 }
2114 skip_explict_conf:
2115                 ctio->u.status1.flags &=
2116                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2117                 ctio->u.status1.flags |=
2118                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2119                 ctio->u.status1.scsi_status |=
2120                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
2121                 ctio->u.status1.sense_length =
2122                     cpu_to_le16(prm->sense_buffer_len);
2123                 for (i = 0; i < prm->sense_buffer_len/4; i++)
2124                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
2125                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
2126 #if 0
2127                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
2128                         static int q;
2129                         if (q < 10) {
2130                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2131                                     "qla_target(%d): %d bytes of sense "
2132                                     "lost", prm->tgt->ha->vp_idx,
2133                                     prm->sense_buffer_len % 4);
2134                                 q++;
2135                         }
2136                 }
2137 #endif
2138         } else {
2139                 ctio->u.status1.flags &=
2140                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2141                 ctio->u.status1.flags |=
2142                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2143                 ctio->u.status1.sense_length = 0;
2144                 memset(ctio->u.status1.sense_data, 0,
2145                     sizeof(ctio->u.status1.sense_data));
2146         }
2147
2148         /* Sense with len > 24, is it possible ??? */
2149 }
2150
2151
2152
2153 /* diff  */
2154 static inline int
2155 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
2156 {
2157         /*
2158          * Uncomment when corresponding SCSI changes are done.
2159          *
2160          if (!sp->cmd->prot_chk)
2161          return 0;
2162          *
2163          */
2164         switch (se_cmd->prot_op) {
2165         case TARGET_PROT_DOUT_INSERT:
2166         case TARGET_PROT_DIN_STRIP:
2167                 if (ql2xenablehba_err_chk >= 1)
2168                         return 1;
2169                 break;
2170         case TARGET_PROT_DOUT_PASS:
2171         case TARGET_PROT_DIN_PASS:
2172                 if (ql2xenablehba_err_chk >= 2)
2173                         return 1;
2174                 break;
2175         case TARGET_PROT_DIN_INSERT:
2176         case TARGET_PROT_DOUT_STRIP:
2177                 return 1;
2178         default:
2179                 break;
2180         }
2181         return 0;
2182 }
2183
2184 /*
2185  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2186  *
2187  */
2188 static inline void
2189 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2190 {
2191         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2192
2193         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2194          * have been immplemented by TCM, before AppTag is avail.
2195          * Look for modesense_handlers[]
2196          */
2197         ctx->app_tag = 0;
2198         ctx->app_tag_mask[0] = 0x0;
2199         ctx->app_tag_mask[1] = 0x0;
2200
2201         switch (se_cmd->prot_type) {
2202         case TARGET_DIF_TYPE0_PROT:
2203                 /*
2204                  * No check for ql2xenablehba_err_chk, as it would be an
2205                  * I/O error if hba tag generation is not done.
2206                  */
2207                 ctx->ref_tag = cpu_to_le32(lba);
2208
2209                 if (!qlt_hba_err_chk_enabled(se_cmd))
2210                         break;
2211
2212                 /* enable ALL bytes of the ref tag */
2213                 ctx->ref_tag_mask[0] = 0xff;
2214                 ctx->ref_tag_mask[1] = 0xff;
2215                 ctx->ref_tag_mask[2] = 0xff;
2216                 ctx->ref_tag_mask[3] = 0xff;
2217                 break;
2218         /*
2219          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2220          * 16 bit app tag.
2221          */
2222         case TARGET_DIF_TYPE1_PROT:
2223                 ctx->ref_tag = cpu_to_le32(lba);
2224
2225                 if (!qlt_hba_err_chk_enabled(se_cmd))
2226                         break;
2227
2228                 /* enable ALL bytes of the ref tag */
2229                 ctx->ref_tag_mask[0] = 0xff;
2230                 ctx->ref_tag_mask[1] = 0xff;
2231                 ctx->ref_tag_mask[2] = 0xff;
2232                 ctx->ref_tag_mask[3] = 0xff;
2233                 break;
2234         /*
2235          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2236          * match LBA in CDB + N
2237          */
2238         case TARGET_DIF_TYPE2_PROT:
2239                 ctx->ref_tag = cpu_to_le32(lba);
2240
2241                 if (!qlt_hba_err_chk_enabled(se_cmd))
2242                         break;
2243
2244                 /* enable ALL bytes of the ref tag */
2245                 ctx->ref_tag_mask[0] = 0xff;
2246                 ctx->ref_tag_mask[1] = 0xff;
2247                 ctx->ref_tag_mask[2] = 0xff;
2248                 ctx->ref_tag_mask[3] = 0xff;
2249                 break;
2250
2251         /* For Type 3 protection: 16 bit GUARD only */
2252         case TARGET_DIF_TYPE3_PROT:
2253                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2254                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2255                 break;
2256         }
2257 }
2258
2259
2260 static inline int
2261 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2262 {
2263         uint32_t                *cur_dsd;
2264         int                     sgc;
2265         uint32_t                transfer_length = 0;
2266         uint32_t                data_bytes;
2267         uint32_t                dif_bytes;
2268         uint8_t                 bundling = 1;
2269         uint8_t                 *clr_ptr;
2270         struct crc_context      *crc_ctx_pkt = NULL;
2271         struct qla_hw_data      *ha;
2272         struct ctio_crc2_to_fw  *pkt;
2273         dma_addr_t              crc_ctx_dma;
2274         uint16_t                fw_prot_opts = 0;
2275         struct qla_tgt_cmd      *cmd = prm->cmd;
2276         struct se_cmd           *se_cmd = &cmd->se_cmd;
2277         uint32_t h;
2278         struct atio_from_isp *atio = &prm->cmd->atio;
2279         uint16_t t16;
2280
2281         sgc = 0;
2282         ha = vha->hw;
2283
2284         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2285         prm->pkt = pkt;
2286         memset(pkt, 0, sizeof(*pkt));
2287
2288         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2289                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2290                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2291                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2292
2293         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2294             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2295                 bundling = 0;
2296
2297         /* Compute dif len and adjust data len to incude protection */
2298         data_bytes = cmd->bufflen;
2299         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2300
2301         switch (se_cmd->prot_op) {
2302         case TARGET_PROT_DIN_INSERT:
2303         case TARGET_PROT_DOUT_STRIP:
2304                 transfer_length = data_bytes;
2305                 data_bytes += dif_bytes;
2306                 break;
2307
2308         case TARGET_PROT_DIN_STRIP:
2309         case TARGET_PROT_DOUT_INSERT:
2310         case TARGET_PROT_DIN_PASS:
2311         case TARGET_PROT_DOUT_PASS:
2312                 transfer_length = data_bytes + dif_bytes;
2313                 break;
2314
2315         default:
2316                 BUG();
2317                 break;
2318         }
2319
2320         if (!qlt_hba_err_chk_enabled(se_cmd))
2321                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2322         /* HBA error checking enabled */
2323         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2324                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2325                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2326                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2327                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2328                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2329         }
2330
2331         switch (se_cmd->prot_op) {
2332         case TARGET_PROT_DIN_INSERT:
2333         case TARGET_PROT_DOUT_INSERT:
2334                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2335                 break;
2336         case TARGET_PROT_DIN_STRIP:
2337         case TARGET_PROT_DOUT_STRIP:
2338                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2339                 break;
2340         case TARGET_PROT_DIN_PASS:
2341         case TARGET_PROT_DOUT_PASS:
2342                 fw_prot_opts |= PO_MODE_DIF_PASS;
2343                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2344                 break;
2345         default:/* Normal Request */
2346                 fw_prot_opts |= PO_MODE_DIF_PASS;
2347                 break;
2348         }
2349
2350
2351         /* ---- PKT ---- */
2352         /* Update entry type to indicate Command Type CRC_2 IOCB */
2353         pkt->entry_type  = CTIO_CRC2;
2354         pkt->entry_count = 1;
2355         pkt->vp_index = vha->vp_idx;
2356
2357         h = qlt_make_handle(vha);
2358         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2359                 /*
2360                  * CTIO type 7 from the firmware doesn't provide a way to
2361                  * know the initiator's LOOP ID, hence we can't find
2362                  * the session and, so, the command.
2363                  */
2364                 return -EAGAIN;
2365         } else
2366                 ha->tgt.cmds[h-1] = prm->cmd;
2367
2368
2369         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2370         pkt->nport_handle = prm->cmd->loop_id;
2371         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2372         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2373         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2374         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2375         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2376
2377         /* silence compile warning */
2378         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2379         pkt->ox_id  = cpu_to_le16(t16);
2380
2381         t16 = (atio->u.isp24.attr << 9);
2382         pkt->flags |= cpu_to_le16(t16);
2383         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2384
2385         /* Set transfer direction */
2386         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2387                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2388         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2389                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2390
2391
2392         pkt->dseg_count = prm->tot_dsds;
2393         /* Fibre channel byte count */
2394         pkt->transfer_length = cpu_to_le32(transfer_length);
2395
2396
2397         /* ----- CRC context -------- */
2398
2399         /* Allocate CRC context from global pool */
2400         crc_ctx_pkt = cmd->ctx =
2401             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2402
2403         if (!crc_ctx_pkt)
2404                 goto crc_queuing_error;
2405
2406         /* Zero out CTX area. */
2407         clr_ptr = (uint8_t *)crc_ctx_pkt;
2408         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2409
2410         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2411         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2412
2413         /* Set handle */
2414         crc_ctx_pkt->handle = pkt->handle;
2415
2416         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2417
2418         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2419         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2420         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2421
2422
2423         if (!bundling) {
2424                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2425         } else {
2426                 /*
2427                  * Configure Bundling if we need to fetch interlaving
2428                  * protection PCI accesses
2429                  */
2430                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2431                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2432                 crc_ctx_pkt->u.bundling.dseg_count =
2433                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2434                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2435         }
2436
2437         /* Finish the common fields of CRC pkt */
2438         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2439         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2440         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2441         crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2442
2443
2444         /* Walks data segments */
2445         pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2446
2447         if (!bundling && prm->prot_seg_cnt) {
2448                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2449                         prm->tot_dsds, cmd))
2450                         goto crc_queuing_error;
2451         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2452                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2453                 goto crc_queuing_error;
2454
2455         if (bundling && prm->prot_seg_cnt) {
2456                 /* Walks dif segments */
2457                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2458
2459                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2460                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2461                         prm->prot_seg_cnt, cmd))
2462                         goto crc_queuing_error;
2463         }
2464         return QLA_SUCCESS;
2465
2466 crc_queuing_error:
2467         /* Cleanup will be performed by the caller */
2468
2469         return QLA_FUNCTION_FAILED;
2470 }
2471
2472
2473 /*
2474  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2475  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2476  */
2477 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2478         uint8_t scsi_status)
2479 {
2480         struct scsi_qla_host *vha = cmd->vha;
2481         struct qla_hw_data *ha = vha->hw;
2482         struct ctio7_to_24xx *pkt;
2483         struct qla_tgt_prm prm;
2484         uint32_t full_req_cnt = 0;
2485         unsigned long flags = 0;
2486         int res;
2487
2488         spin_lock_irqsave(&ha->hardware_lock, flags);
2489         if (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
2490                 cmd->state = QLA_TGT_STATE_PROCESSED;
2491                 if (cmd->sess->logout_completed)
2492                         /* no need to terminate. FW already freed exchange. */
2493                         qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2494                 else
2495                         qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2496                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2497                 return 0;
2498         }
2499         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2500
2501         memset(&prm, 0, sizeof(prm));
2502         qlt_check_srr_debug(cmd, &xmit_type);
2503
2504         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2505             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2506             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2507             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2508             &cmd->se_cmd);
2509
2510         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2511             &full_req_cnt);
2512         if (unlikely(res != 0)) {
2513                 return res;
2514         }
2515
2516         spin_lock_irqsave(&ha->hardware_lock, flags);
2517
2518         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2519                 /*
2520                  * Either a chip reset is active or this request was from
2521                  * previous life, just abort the processing.
2522                  */
2523                 cmd->state = QLA_TGT_STATE_PROCESSED;
2524                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2525                 ql_dbg(ql_dbg_async, vha, 0xe101,
2526                         "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2527                         qla2x00_reset_active(vha), cmd->reset_count,
2528                         ha->chip_reset);
2529                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2530                 return 0;
2531         }
2532
2533         /* Does F/W have an IOCBs for this request */
2534         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2535         if (unlikely(res))
2536                 goto out_unmap_unlock;
2537
2538         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2539                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2540         else
2541                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2542         if (unlikely(res != 0)) {
2543                 vha->req->cnt += full_req_cnt;
2544                 goto out_unmap_unlock;
2545         }
2546
2547         pkt = (struct ctio7_to_24xx *)prm.pkt;
2548
2549         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2550                 pkt->u.status0.flags |=
2551                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2552                         CTIO7_FLAGS_STATUS_MODE_0);
2553
2554                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2555                         qlt_load_data_segments(&prm, vha);
2556
2557                 if (prm.add_status_pkt == 0) {
2558                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2559                                 pkt->u.status0.scsi_status =
2560                                     cpu_to_le16(prm.rq_result);
2561                                 pkt->u.status0.residual =
2562                                     cpu_to_le32(prm.residual);
2563                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2564                                     CTIO7_FLAGS_SEND_STATUS);
2565                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2566                                         pkt->u.status0.flags |=
2567                                             __constant_cpu_to_le16(
2568                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2569                                                 CTIO7_FLAGS_CONFORM_REQ);
2570                                 }
2571                         }
2572
2573                 } else {
2574                         /*
2575                          * We have already made sure that there is sufficient
2576                          * amount of request entries to not drop HW lock in
2577                          * req_pkt().
2578                          */
2579                         struct ctio7_to_24xx *ctio =
2580                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2581
2582                         ql_dbg(ql_dbg_io, vha, 0x305e,
2583                             "Building additional status packet 0x%p.\n",
2584                             ctio);
2585
2586                         /*
2587                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2588                          * ctio7_to_24xx
2589                          */
2590                         memcpy(ctio, pkt, sizeof(*ctio));
2591                         /* reset back to CTIO7 */
2592                         ctio->entry_count = 1;
2593                         ctio->entry_type = CTIO_TYPE7;
2594                         ctio->dseg_count = 0;
2595                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2596                             CTIO7_FLAGS_DATA_IN);
2597
2598                         /* Real finish is ctio_m1's finish */
2599                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2600                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2601                             CTIO7_FLAGS_DONT_RET_CTIO);
2602
2603                         /* qlt_24xx_init_ctio_to_isp will correct
2604                          * all neccessary fields that's part of CTIO7.
2605                          * There should be no residual of CTIO-CRC2 data.
2606                          */
2607                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2608                             &prm);
2609                         pr_debug("Status CTIO7: %p\n", ctio);
2610                 }
2611         } else
2612                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2613
2614
2615         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2616         cmd->cmd_sent_to_fw = 1;
2617
2618         /* Memory Barrier */
2619         wmb();
2620         qla2x00_start_iocbs(vha, vha->req);
2621         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2622
2623         return 0;
2624
2625 out_unmap_unlock:
2626         qlt_unmap_sg(vha, cmd);
2627         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2628
2629         return res;
2630 }
2631 EXPORT_SYMBOL(qlt_xmit_response);
2632
2633 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2634 {
2635         struct ctio7_to_24xx *pkt;
2636         struct scsi_qla_host *vha = cmd->vha;
2637         struct qla_hw_data *ha = vha->hw;
2638         struct qla_tgt *tgt = cmd->tgt;
2639         struct qla_tgt_prm prm;
2640         unsigned long flags;
2641         int res = 0;
2642
2643         memset(&prm, 0, sizeof(prm));
2644         prm.cmd = cmd;
2645         prm.tgt = tgt;
2646         prm.sg = NULL;
2647         prm.req_cnt = 1;
2648
2649         /* Send marker if required */
2650         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2651                 return -EIO;
2652
2653         /* Calculate number of entries and segments required */
2654         if (qlt_pci_map_calc_cnt(&prm) != 0)
2655                 return -EAGAIN;
2656
2657         spin_lock_irqsave(&ha->hardware_lock, flags);
2658
2659         if (qla2x00_reset_active(vha) || (cmd->reset_count != ha->chip_reset) ||
2660             (cmd->sess && cmd->sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)) {
2661                 /*
2662                  * Either a chip reset is active or this request was from
2663                  * previous life, just abort the processing.
2664                  */
2665                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2666                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2667                 ql_dbg(ql_dbg_async, vha, 0xe102,
2668                         "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2669                         qla2x00_reset_active(vha), cmd->reset_count,
2670                         ha->chip_reset);
2671                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2672                 return 0;
2673         }
2674
2675         /* Does F/W have an IOCBs for this request */
2676         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2677         if (res != 0)
2678                 goto out_unlock_free_unmap;
2679         if (cmd->se_cmd.prot_op)
2680                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2681         else
2682                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2683
2684         if (unlikely(res != 0)) {
2685                 vha->req->cnt += prm.req_cnt;
2686                 goto out_unlock_free_unmap;
2687         }
2688
2689         pkt = (struct ctio7_to_24xx *)prm.pkt;
2690         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2691             CTIO7_FLAGS_STATUS_MODE_0);
2692
2693         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2694                 qlt_load_data_segments(&prm, vha);
2695
2696         cmd->state = QLA_TGT_STATE_NEED_DATA;
2697         cmd->cmd_sent_to_fw = 1;
2698
2699         /* Memory Barrier */
2700         wmb();
2701         qla2x00_start_iocbs(vha, vha->req);
2702         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2703
2704         return res;
2705
2706 out_unlock_free_unmap:
2707         qlt_unmap_sg(vha, cmd);
2708         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2709
2710         return res;
2711 }
2712 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2713
2714
2715 /*
2716  * Checks the guard or meta-data for the type of error
2717  * detected by the HBA.
2718  */
2719 static inline int
2720 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2721                 struct ctio_crc_from_fw *sts)
2722 {
2723         uint8_t         *ap = &sts->actual_dif[0];
2724         uint8_t         *ep = &sts->expected_dif[0];
2725         uint32_t        e_ref_tag, a_ref_tag;
2726         uint16_t        e_app_tag, a_app_tag;
2727         uint16_t        e_guard, a_guard;
2728         uint64_t        lba = cmd->se_cmd.t_task_lba;
2729
2730         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2731         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2732         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2733
2734         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2735         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2736         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2737
2738         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2739             "iocb(s) %p Returned STATUS.\n", sts);
2740
2741         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2742             "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",
2743             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2744             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2745
2746         /*
2747          * Ignore sector if:
2748          * For type     3: ref & app tag is all 'f's
2749          * For type 0,1,2: app tag is all 'f's
2750          */
2751         if ((a_app_tag == 0xffff) &&
2752             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2753              (a_ref_tag == 0xffffffff))) {
2754                 uint32_t blocks_done;
2755
2756                 /* 2TB boundary case covered automatically with this */
2757                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2758                 cmd->se_cmd.bad_sector = e_ref_tag;
2759                 cmd->se_cmd.pi_err = 0;
2760                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2761                         "need to return scsi good\n");
2762
2763                 /* Update protection tag */
2764                 if (cmd->prot_sg_cnt) {
2765                         uint32_t i, j = 0, k = 0, num_ent;
2766                         struct scatterlist *sg, *sgl;
2767
2768
2769                         sgl = cmd->prot_sg;
2770
2771                         /* Patch the corresponding protection tags */
2772                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2773                                 num_ent = sg_dma_len(sg) / 8;
2774                                 if (k + num_ent < blocks_done) {
2775                                         k += num_ent;
2776                                         continue;
2777                                 }
2778                                 j = blocks_done - k - 1;
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 | CTIO_COMPLETION_HANDLE_MARK;
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 = __constant_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             __constant_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                     __constant_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         const struct target_core_fabric_ops *tfo;
3368         struct qla_tgt_cmd *cmd;
3369
3370         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3371                 /* That could happen only in case of an error/reset/abort */
3372                 if (status != CTIO_SUCCESS) {
3373                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3374                             "Intermediate CTIO received"
3375                             " (status %x)\n", status);
3376                 }
3377                 return;
3378         }
3379
3380         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3381         if (cmd == NULL)
3382                 return;
3383
3384         se_cmd = &cmd->se_cmd;
3385         tfo = se_cmd->se_tfo;
3386         cmd->cmd_sent_to_fw = 0;
3387
3388         qlt_unmap_sg(vha, cmd);
3389
3390         if (unlikely(status != CTIO_SUCCESS)) {
3391                 switch (status & 0xFFFF) {
3392                 case CTIO_LIP_RESET:
3393                 case CTIO_TARGET_RESET:
3394                 case CTIO_ABORTED:
3395                         /* driver request abort via Terminate exchange */
3396                 case CTIO_TIMEOUT:
3397                 case CTIO_INVALID_RX_ID:
3398                         /* They are OK */
3399                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3400                             "qla_target(%d): CTIO with "
3401                             "status %#x received, state %x, se_cmd %p, "
3402                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3403                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3404                             status, cmd->state, se_cmd);
3405                         break;
3406
3407                 case CTIO_PORT_LOGGED_OUT:
3408                 case CTIO_PORT_UNAVAILABLE:
3409                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3410                             "qla_target(%d): CTIO with PORT LOGGED "
3411                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
3412                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3413                             status, cmd->state, se_cmd);
3414                         break;
3415
3416                 case CTIO_SRR_RECEIVED:
3417                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3418                             "qla_target(%d): CTIO with SRR_RECEIVED"
3419                             " status %x received (state %x, se_cmd %p)\n",
3420                             vha->vp_idx, status, cmd->state, se_cmd);
3421                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3422                                 break;
3423                         else
3424                                 return;
3425
3426                 case CTIO_DIF_ERROR: {
3427                         struct ctio_crc_from_fw *crc =
3428                                 (struct ctio_crc_from_fw *)ctio;
3429                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3430                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3431                             vha->vp_idx, status, cmd->state, se_cmd,
3432                             *((u64 *)&crc->actual_dif[0]),
3433                             *((u64 *)&crc->expected_dif[0]));
3434
3435                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3436                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3437                                         /* scsi Write/xfer rdy complete */
3438                                         goto skip_term;
3439                                 } else {
3440                                         /* scsi read/xmit respond complete
3441                                          * call handle dif to send scsi status
3442                                          * rather than terminate exchange.
3443                                          */
3444                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3445                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3446                                         return;
3447                                 }
3448                         } else {
3449                                 /* Need to generate a SCSI good completion.
3450                                  * because FW did not send scsi status.
3451                                  */
3452                                 status = 0;
3453                                 goto skip_term;
3454                         }
3455                         break;
3456                 }
3457                 default:
3458                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3459                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3460                             vha->vp_idx, status, cmd->state, se_cmd);
3461                         break;
3462                 }
3463
3464
3465                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3466                  * cmd is already aborted/terminated, we don't
3467                  * need to terminate again.  The exchange is already
3468                  * cleaned up/freed at FW level.  Just cleanup at driver
3469                  * level.
3470                  */
3471                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3472                     (cmd->state != QLA_TGT_STATE_ABORTED)) {
3473                         cmd->cmd_flags |= BIT_13;
3474                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3475                                 return;
3476                 }
3477         }
3478 skip_term:
3479
3480         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3481                 cmd->cmd_flags |= BIT_12;
3482         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3483                 int rx_status = 0;
3484
3485                 cmd->state = QLA_TGT_STATE_DATA_IN;
3486
3487                 if (unlikely(status != CTIO_SUCCESS))
3488                         rx_status = -EIO;
3489                 else
3490                         cmd->write_data_transferred = 1;
3491
3492                 ha->tgt.tgt_ops->handle_data(cmd);
3493                 return;
3494         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3495                 cmd->cmd_flags |= BIT_18;
3496                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3497                   "Aborted command %p (tag %lld) finished\n", cmd, se_cmd->tag);
3498         } else {
3499                 cmd->cmd_flags |= BIT_19;
3500                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3501                     "qla_target(%d): A command in state (%d) should "
3502                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3503         }
3504
3505         if (unlikely(status != CTIO_SUCCESS) &&
3506                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3507                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3508                 dump_stack();
3509         }
3510
3511         ha->tgt.tgt_ops->free_cmd(cmd);
3512 }
3513
3514 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3515         uint8_t task_codes)
3516 {
3517         int fcp_task_attr;
3518
3519         switch (task_codes) {
3520         case ATIO_SIMPLE_QUEUE:
3521                 fcp_task_attr = TCM_SIMPLE_TAG;
3522                 break;
3523         case ATIO_HEAD_OF_QUEUE:
3524                 fcp_task_attr = TCM_HEAD_TAG;
3525                 break;
3526         case ATIO_ORDERED_QUEUE:
3527                 fcp_task_attr = TCM_ORDERED_TAG;
3528                 break;
3529         case ATIO_ACA_QUEUE:
3530                 fcp_task_attr = TCM_ACA_TAG;
3531                 break;
3532         case ATIO_UNTAGGED:
3533                 fcp_task_attr = TCM_SIMPLE_TAG;
3534                 break;
3535         default:
3536                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3537                     "qla_target: unknown task code %x, use ORDERED instead\n",
3538                     task_codes);
3539                 fcp_task_attr = TCM_ORDERED_TAG;
3540                 break;
3541         }
3542
3543         return fcp_task_attr;
3544 }
3545
3546 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3547                                         uint8_t *);
3548 /*
3549  * Process context for I/O path into tcm_qla2xxx code
3550  */
3551 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3552 {
3553         scsi_qla_host_t *vha = cmd->vha;
3554         struct qla_hw_data *ha = vha->hw;
3555         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3556         struct qla_tgt_sess *sess = cmd->sess;
3557         struct atio_from_isp *atio = &cmd->atio;
3558         unsigned char *cdb;
3559         unsigned long flags;
3560         uint32_t data_length;
3561         int ret, fcp_task_attr, data_dir, bidi = 0;
3562
3563         cmd->cmd_in_wq = 0;
3564         cmd->cmd_flags |= BIT_1;
3565         if (tgt->tgt_stop)
3566                 goto out_term;
3567
3568         if (cmd->state == QLA_TGT_STATE_ABORTED) {
3569                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf082,
3570                     "cmd with tag %u is aborted\n",
3571                     cmd->atio.u.isp24.exchange_addr);
3572                 goto out_term;
3573         }
3574
3575         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3576         cmd->se_cmd.tag = atio->u.isp24.exchange_addr;
3577         cmd->unpacked_lun = scsilun_to_int(
3578             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3579
3580         if (atio->u.isp24.fcp_cmnd.rddata &&
3581             atio->u.isp24.fcp_cmnd.wrdata) {
3582                 bidi = 1;
3583                 data_dir = DMA_TO_DEVICE;
3584         } else if (atio->u.isp24.fcp_cmnd.rddata)
3585                 data_dir = DMA_FROM_DEVICE;
3586         else if (atio->u.isp24.fcp_cmnd.wrdata)
3587                 data_dir = DMA_TO_DEVICE;
3588         else
3589                 data_dir = DMA_NONE;
3590
3591         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3592             atio->u.isp24.fcp_cmnd.task_attr);
3593         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3594             &atio->u.isp24.fcp_cmnd.add_cdb[
3595             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3596
3597         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3598                                           fcp_task_attr, data_dir, bidi);
3599         if (ret != 0)
3600                 goto out_term;
3601         /*
3602          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3603          */
3604         spin_lock_irqsave(&ha->hardware_lock, flags);
3605         ha->tgt.tgt_ops->put_sess(sess);
3606         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3607         return;
3608
3609 out_term:
3610         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3611         /*
3612          * cmd has not sent to target yet, so pass NULL as the second
3613          * argument to qlt_send_term_exchange() and free the memory here.
3614          */
3615         cmd->cmd_flags |= BIT_2;
3616         spin_lock_irqsave(&ha->hardware_lock, flags);
3617         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3618
3619         qlt_decr_num_pend_cmds(vha);
3620         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3621         ha->tgt.tgt_ops->put_sess(sess);
3622         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3623 }
3624
3625 static void qlt_do_work(struct work_struct *work)
3626 {
3627         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3628         scsi_qla_host_t *vha = cmd->vha;
3629         unsigned long flags;
3630
3631         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3632         list_del(&cmd->cmd_list);
3633         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3634
3635         __qlt_do_work(cmd);
3636 }
3637
3638 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3639                                        struct qla_tgt_sess *sess,
3640                                        struct atio_from_isp *atio)
3641 {
3642         struct se_session *se_sess = sess->se_sess;
3643         struct qla_tgt_cmd *cmd;
3644         int tag;
3645
3646         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3647         if (tag < 0)
3648                 return NULL;
3649
3650         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3651         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3652
3653         memcpy(&cmd->atio, atio, sizeof(*atio));
3654         cmd->state = QLA_TGT_STATE_NEW;
3655         cmd->tgt = vha->vha_tgt.qla_tgt;
3656         qlt_incr_num_pend_cmds(vha);
3657         cmd->vha = vha;
3658         cmd->se_cmd.map_tag = tag;
3659         cmd->sess = sess;
3660         cmd->loop_id = sess->loop_id;
3661         cmd->conf_compl_supported = sess->conf_compl_supported;
3662
3663         cmd->cmd_flags = 0;
3664         cmd->jiffies_at_alloc = get_jiffies_64();
3665
3666         cmd->reset_count = vha->hw->chip_reset;
3667
3668         return cmd;
3669 }
3670
3671 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3672                           uint16_t);
3673
3674 static void qlt_create_sess_from_atio(struct work_struct *work)
3675 {
3676         struct qla_tgt_sess_op *op = container_of(work,
3677                                         struct qla_tgt_sess_op, work);
3678         scsi_qla_host_t *vha = op->vha;
3679         struct qla_hw_data *ha = vha->hw;
3680         struct qla_tgt_sess *sess;
3681         struct qla_tgt_cmd *cmd;
3682         unsigned long flags;
3683         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3684
3685         spin_lock_irqsave(&vha->cmd_list_lock, flags);
3686         list_del(&op->cmd_list);
3687         spin_unlock_irqrestore(&vha->cmd_list_lock, flags);
3688
3689         if (op->aborted) {
3690                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf083,
3691                     "sess_op with tag %u is aborted\n",
3692                     op->atio.u.isp24.exchange_addr);
3693                 goto out_term;
3694         }
3695
3696         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3697             "qla_target(%d): Unable to find wwn login"
3698             " (s_id %x:%x:%x), trying to create it manually\n",
3699             vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3700
3701         if (op->atio.u.raw.entry_count > 1) {
3702                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3703                     "Dropping multy entry atio %p\n", &op->atio);
3704                 goto out_term;
3705         }
3706
3707         mutex_lock(&vha->vha_tgt.tgt_mutex);
3708         sess = qlt_make_local_sess(vha, s_id);
3709         /* sess has an extra creation ref. */
3710         mutex_unlock(&vha->vha_tgt.tgt_mutex);
3711
3712         if (!sess)
3713                 goto out_term;
3714         /*
3715          * Now obtain a pre-allocated session tag using the original op->atio
3716          * packet header, and dispatch into __qlt_do_work() using the existing
3717          * process context.
3718          */
3719         cmd = qlt_get_tag(vha, sess, &op->atio);
3720         if (!cmd) {
3721                 spin_lock_irqsave(&ha->hardware_lock, flags);
3722                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3723                 ha->tgt.tgt_ops->put_sess(sess);
3724                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3725                 kfree(op);
3726                 return;
3727         }
3728         /*
3729          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3730          * the extra reference taken above by qlt_make_local_sess()
3731          */
3732         __qlt_do_work(cmd);
3733         kfree(op);
3734         return;
3735
3736 out_term:
3737         spin_lock_irqsave(&ha->hardware_lock, flags);
3738         qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3739         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3740         kfree(op);
3741
3742 }
3743
3744 /* ha->hardware_lock supposed to be held on entry */
3745 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3746         struct atio_from_isp *atio)
3747 {
3748         struct qla_hw_data *ha = vha->hw;
3749         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3750         struct qla_tgt_sess *sess;
3751         struct qla_tgt_cmd *cmd;
3752
3753         if (unlikely(tgt->tgt_stop)) {
3754                 ql_dbg(ql_dbg_io, vha, 0x3061,
3755                     "New command while device %p is shutting down\n", tgt);
3756                 return -EFAULT;
3757         }
3758
3759         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3760         if (unlikely(!sess)) {
3761                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3762                                                      GFP_ATOMIC);
3763                 if (!op)
3764                         return -ENOMEM;
3765
3766                 memcpy(&op->atio, atio, sizeof(*atio));
3767                 op->vha = vha;
3768
3769                 spin_lock(&vha->cmd_list_lock);
3770                 list_add_tail(&op->cmd_list, &vha->qla_sess_op_cmd_list);
3771                 spin_unlock(&vha->cmd_list_lock);
3772
3773                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3774                 queue_work(qla_tgt_wq, &op->work);
3775                 return 0;
3776         }
3777
3778         /* Another WWN used to have our s_id. Our PLOGI scheduled its
3779          * session deletion, but it's still in sess_del_work wq */
3780         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
3781                 ql_dbg(ql_dbg_io, vha, 0x3061,
3782                     "New command while old session %p is being deleted\n",
3783                     sess);
3784                 return -EFAULT;
3785         }
3786
3787         /*
3788          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3789          */
3790         kref_get(&sess->se_sess->sess_kref);
3791
3792         cmd = qlt_get_tag(vha, sess, atio);
3793         if (!cmd) {
3794                 ql_dbg(ql_dbg_io, vha, 0x3062,
3795                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3796                 ha->tgt.tgt_ops->put_sess(sess);
3797                 return -ENOMEM;
3798         }
3799
3800         cmd->cmd_in_wq = 1;
3801         cmd->cmd_flags |= BIT_0;
3802
3803         spin_lock(&vha->cmd_list_lock);
3804         list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list);
3805         spin_unlock(&vha->cmd_list_lock);
3806
3807         INIT_WORK(&cmd->work, qlt_do_work);
3808         queue_work(qla_tgt_wq, &cmd->work);
3809         return 0;
3810
3811 }
3812
3813 /* ha->hardware_lock supposed to be held on entry */
3814 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3815         int fn, void *iocb, int flags)
3816 {
3817         struct scsi_qla_host *vha = sess->vha;
3818         struct qla_hw_data *ha = vha->hw;
3819         struct qla_tgt_mgmt_cmd *mcmd;
3820         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3821         int res;
3822         uint8_t tmr_func;
3823
3824         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3825         if (!mcmd) {
3826                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3827                     "qla_target(%d): Allocation of management "
3828                     "command failed, some commands and their data could "
3829                     "leak\n", vha->vp_idx);
3830                 return -ENOMEM;
3831         }
3832         memset(mcmd, 0, sizeof(*mcmd));
3833         mcmd->sess = sess;
3834
3835         if (iocb) {
3836                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3837                     sizeof(mcmd->orig_iocb.imm_ntfy));
3838         }
3839         mcmd->tmr_func = fn;
3840         mcmd->flags = flags;
3841         mcmd->reset_count = vha->hw->chip_reset;
3842
3843         switch (fn) {
3844         case QLA_TGT_CLEAR_ACA:
3845                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3846                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3847                 tmr_func = TMR_CLEAR_ACA;
3848                 break;
3849
3850         case QLA_TGT_TARGET_RESET:
3851                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3852                     "qla_target(%d): TARGET_RESET received\n",
3853                     sess->vha->vp_idx);
3854                 tmr_func = TMR_TARGET_WARM_RESET;
3855                 break;
3856
3857         case QLA_TGT_LUN_RESET:
3858                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3859                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3860                 tmr_func = TMR_LUN_RESET;
3861                 abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
3862                 break;
3863
3864         case QLA_TGT_CLEAR_TS:
3865                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3866                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3867                 tmr_func = TMR_CLEAR_TASK_SET;
3868                 break;
3869
3870         case QLA_TGT_ABORT_TS:
3871                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3872                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3873                 tmr_func = TMR_ABORT_TASK_SET;
3874                 break;
3875 #if 0
3876         case QLA_TGT_ABORT_ALL:
3877                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3878                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3879                     sess->vha->vp_idx);
3880                 tmr_func = 0;
3881                 break;
3882
3883         case QLA_TGT_ABORT_ALL_SESS:
3884                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3885                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3886                     sess->vha->vp_idx);
3887                 tmr_func = 0;
3888                 break;
3889
3890         case QLA_TGT_NEXUS_LOSS_SESS:
3891                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3892                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3893                     sess->vha->vp_idx);
3894                 tmr_func = 0;
3895                 break;
3896
3897         case QLA_TGT_NEXUS_LOSS:
3898                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3899                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3900                 tmr_func = 0;
3901                 break;
3902 #endif
3903         default:
3904                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3905                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3906                     sess->vha->vp_idx, fn);
3907                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3908                 return -ENOSYS;
3909         }
3910
3911         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3912         if (res != 0) {
3913                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3914                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3915                     sess->vha->vp_idx, res);
3916                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3917                 return -EFAULT;
3918         }
3919
3920         return 0;
3921 }
3922
3923 /* ha->hardware_lock supposed to be held on entry */
3924 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3925 {
3926         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3927         struct qla_hw_data *ha = vha->hw;
3928         struct qla_tgt *tgt;
3929         struct qla_tgt_sess *sess;
3930         uint32_t lun, unpacked_lun;
3931         int lun_size, fn;
3932
3933         tgt = vha->vha_tgt.qla_tgt;
3934
3935         lun = a->u.isp24.fcp_cmnd.lun;
3936         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3937         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3938         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3939             a->u.isp24.fcp_hdr.s_id);
3940         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3941
3942         if (!sess) {
3943                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3944                     "qla_target(%d): task mgmt fn 0x%x for "
3945                     "non-existant session\n", vha->vp_idx, fn);
3946                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3947                     sizeof(struct atio_from_isp));
3948         }
3949
3950         if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS)
3951                 return -EFAULT;
3952
3953         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3954 }
3955
3956 /* ha->hardware_lock supposed to be held on entry */
3957 static int __qlt_abort_task(struct scsi_qla_host *vha,
3958         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3959 {
3960         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3961         struct qla_hw_data *ha = vha->hw;
3962         struct qla_tgt_mgmt_cmd *mcmd;
3963         uint32_t lun, unpacked_lun;
3964         int rc;
3965
3966         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3967         if (mcmd == NULL) {
3968                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3969                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3970                     vha->vp_idx, __func__);
3971                 return -ENOMEM;
3972         }
3973         memset(mcmd, 0, sizeof(*mcmd));
3974
3975         mcmd->sess = sess;
3976         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3977             sizeof(mcmd->orig_iocb.imm_ntfy));
3978
3979         lun = a->u.isp24.fcp_cmnd.lun;
3980         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3981         mcmd->reset_count = vha->hw->chip_reset;
3982
3983         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3984             le16_to_cpu(iocb->u.isp2x.seq_id));
3985         if (rc != 0) {
3986                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3987                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3988                     vha->vp_idx, rc);
3989                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3990                 return -EFAULT;
3991         }
3992
3993         return 0;
3994 }
3995
3996 /* ha->hardware_lock supposed to be held on entry */
3997 static int qlt_abort_task(struct scsi_qla_host *vha,
3998         struct imm_ntfy_from_isp *iocb)
3999 {
4000         struct qla_hw_data *ha = vha->hw;
4001         struct qla_tgt_sess *sess;
4002         int loop_id;
4003
4004         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
4005
4006         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
4007         if (sess == NULL) {
4008                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
4009                     "qla_target(%d): task abort for unexisting "
4010                     "session\n", vha->vp_idx);
4011                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
4012                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
4013         }
4014
4015         return __qlt_abort_task(vha, iocb, sess);
4016 }
4017
4018 void qlt_logo_completion_handler(fc_port_t *fcport, int rc)
4019 {
4020         if (fcport->tgt_session) {
4021                 if (rc != MBS_COMMAND_COMPLETE) {
4022                         ql_dbg(ql_dbg_tgt_mgt, fcport->vha, 0xf093,
4023                                 "%s: se_sess %p / sess %p from"
4024                                 " port %8phC loop_id %#04x s_id %02x:%02x:%02x"
4025                                 " LOGO failed: %#x\n",
4026                                 __func__,
4027                                 fcport->tgt_session->se_sess,
4028                                 fcport->tgt_session,
4029                                 fcport->port_name, fcport->loop_id,
4030                                 fcport->d_id.b.domain, fcport->d_id.b.area,
4031                                 fcport->d_id.b.al_pa, rc);
4032                 }
4033
4034                 fcport->tgt_session->logout_completed = 1;
4035         }
4036 }
4037
4038 static void qlt_swap_imm_ntfy_iocb(struct imm_ntfy_from_isp *a,
4039     struct imm_ntfy_from_isp *b)
4040 {
4041         struct imm_ntfy_from_isp tmp;
4042         memcpy(&tmp, a, sizeof(struct imm_ntfy_from_isp));
4043         memcpy(a, b, sizeof(struct imm_ntfy_from_isp));
4044         memcpy(b, &tmp, sizeof(struct imm_ntfy_from_isp));
4045 }
4046
4047 /*
4048 * ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list)
4049 *
4050 * Schedules sessions with matching port_id/loop_id but different wwn for
4051 * deletion. Returns existing session with matching wwn if present.
4052 * Null otherwise.
4053 */
4054 static struct qla_tgt_sess *
4055 qlt_find_sess_invalidate_other(struct qla_tgt *tgt, uint64_t wwn,
4056     port_id_t port_id, uint16_t loop_id)
4057 {
4058         struct qla_tgt_sess *sess = NULL, *other_sess;
4059         uint64_t other_wwn;
4060
4061         list_for_each_entry(other_sess, &tgt->sess_list, sess_list_entry) {
4062
4063                 other_wwn = wwn_to_u64(other_sess->port_name);
4064
4065                 if (wwn == other_wwn) {
4066                         WARN_ON(sess);
4067                         sess = other_sess;
4068                         continue;
4069                 }
4070
4071                 /* find other sess with nport_id collision */
4072                 if (port_id.b24 == other_sess->s_id.b24) {
4073                         if (loop_id != other_sess->loop_id) {
4074                                 ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000c,
4075                                     "Invalidating sess %p loop_id %d wwn %llx.\n",
4076                                     other_sess, other_sess->loop_id, other_wwn);
4077
4078                                 /*
4079                                  * logout_on_delete is set by default, but another
4080                                  * session that has the same s_id/loop_id combo
4081                                  * might have cleared it when requested this session
4082                                  * deletion, so don't touch it
4083                                  */
4084                                 qlt_schedule_sess_for_deletion(other_sess, true);
4085                         } else {
4086                                 /*
4087                                  * Another wwn used to have our s_id/loop_id
4088                                  * combo - kill the session, but don't log out
4089                                  */
4090                                 sess->logout_on_delete = 0;
4091                                 qlt_schedule_sess_for_deletion(other_sess,
4092                                     true);
4093                         }
4094                         continue;
4095                 }
4096
4097                 /* find other sess with nport handle collision */
4098                 if (loop_id == other_sess->loop_id) {
4099                         ql_dbg(ql_dbg_tgt_tmr, tgt->vha, 0x1000d,
4100                                "Invalidating sess %p loop_id %d wwn %llx.\n",
4101                                other_sess, other_sess->loop_id, other_wwn);
4102
4103                         /* Same loop_id but different s_id
4104                          * Ok to kill and logout */
4105                         qlt_schedule_sess_for_deletion(other_sess, true);
4106                 }
4107         }
4108
4109         return sess;
4110 }
4111
4112 /* Abort any commands for this s_id waiting on qla_tgt_wq workqueue */
4113 static int abort_cmds_for_s_id(struct scsi_qla_host *vha, port_id_t *s_id)
4114 {
4115         struct qla_tgt_sess_op *op;
4116         struct qla_tgt_cmd *cmd;
4117         uint32_t key;
4118         int count = 0;
4119
4120         key = (((u32)s_id->b.domain << 16) |
4121                ((u32)s_id->b.area   <<  8) |
4122                ((u32)s_id->b.al_pa));
4123
4124         spin_lock(&vha->cmd_list_lock);
4125         list_for_each_entry(op, &vha->qla_sess_op_cmd_list, cmd_list) {
4126                 uint32_t op_key = sid_to_key(op->atio.u.isp24.fcp_hdr.s_id);
4127                 if (op_key == key) {
4128                         op->aborted = true;
4129                         count++;
4130                 }
4131         }
4132         list_for_each_entry(cmd, &vha->qla_cmd_list, cmd_list) {
4133                 uint32_t cmd_key = sid_to_key(cmd->atio.u.isp24.fcp_hdr.s_id);
4134                 if (cmd_key == key) {
4135                         cmd->state = QLA_TGT_STATE_ABORTED;
4136                         count++;
4137                 }
4138         }
4139         spin_unlock(&vha->cmd_list_lock);
4140
4141         return count;
4142 }
4143
4144 /*
4145  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4146  */
4147 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
4148         struct imm_ntfy_from_isp *iocb)
4149 {
4150         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4151         struct qla_hw_data *ha = vha->hw;
4152         struct qla_tgt_sess *sess = NULL;
4153         uint64_t wwn;
4154         port_id_t port_id;
4155         uint16_t loop_id;
4156         uint16_t wd3_lo;
4157         int res = 0;
4158
4159         wwn = wwn_to_u64(iocb->u.isp24.port_name);
4160
4161         port_id.b.domain = iocb->u.isp24.port_id[2];
4162         port_id.b.area   = iocb->u.isp24.port_id[1];
4163         port_id.b.al_pa  = iocb->u.isp24.port_id[0];
4164         port_id.b.rsvd_1 = 0;
4165
4166         loop_id = le16_to_cpu(iocb->u.isp24.nport_handle);
4167
4168         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
4169             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
4170             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
4171
4172         /* res = 1 means ack at the end of thread
4173          * res = 0 means ack async/later.
4174          */
4175         switch (iocb->u.isp24.status_subcode) {
4176         case ELS_PLOGI:
4177
4178                 /* Mark all stale commands in qla_tgt_wq for deletion */
4179                 abort_cmds_for_s_id(vha, &port_id);
4180
4181                 if (wwn)
4182                         sess = qlt_find_sess_invalidate_other(tgt, wwn,
4183                             port_id, loop_id);
4184
4185                 if (!sess || IS_SW_RESV_ADDR(sess->s_id)) {
4186                         res = 1;
4187                         break;
4188                 }
4189
4190                 if (sess->plogi_ack_needed) {
4191                         /*
4192                          * Initiator sent another PLOGI before last PLOGI could
4193                          * finish. Swap plogi iocbs and terminate old one
4194                          * without acking, new one will get acked when session
4195                          * deletion completes.
4196                          */
4197                         ql_log(ql_log_warn, sess->vha, 0xf094,
4198                             "sess %p received double plogi.\n", sess);
4199
4200                         qlt_swap_imm_ntfy_iocb(iocb, &sess->tm_iocb);
4201
4202                         qlt_send_term_imm_notif(vha, iocb, 1);
4203
4204                         res = 0;
4205                         break;
4206                 }
4207
4208                 res = 0;
4209
4210                 /*
4211                  * Save immediate Notif IOCB for Ack when sess is done
4212                  * and being deleted.
4213                  */
4214                 memcpy(&sess->tm_iocb, iocb, sizeof(sess->tm_iocb));
4215                 sess->plogi_ack_needed  = 1;
4216
4217                  /*
4218                   * Under normal circumstances we want to release nport handle
4219                   * during LOGO process to avoid nport handle leaks inside FW.
4220                   * The exception is when LOGO is done while another PLOGI with
4221                   * the same nport handle is waiting as might be the case here.
4222                   * Note: there is always a possibily of a race where session
4223                   * deletion has already started for other reasons (e.g. ACL
4224                   * removal) and now PLOGI arrives:
4225                   * 1. if PLOGI arrived in FW after nport handle has been freed,
4226                   *    FW must have assigned this PLOGI a new/same handle and we
4227                   *    can proceed ACK'ing it as usual when session deletion
4228                   *    completes.
4229                   * 2. if PLOGI arrived in FW before LOGO with LCF_FREE_NPORT
4230                   *    bit reached it, the handle has now been released. We'll
4231                   *    get an error when we ACK this PLOGI. Nothing will be sent
4232                   *    back to initiator. Initiator should eventually retry
4233                   *    PLOGI and situation will correct itself.
4234                   */
4235                 sess->keep_nport_handle = ((sess->loop_id == loop_id) &&
4236                                            (sess->s_id.b24 == port_id.b24));
4237                 qlt_schedule_sess_for_deletion(sess, true);
4238                 break;
4239
4240         case ELS_PRLI:
4241                 wd3_lo = le16_to_cpu(iocb->u.isp24.u.prli.wd3_lo);
4242
4243                 if (wwn)
4244                         sess = qlt_find_sess_invalidate_other(tgt, wwn, port_id,
4245                             loop_id);
4246
4247                 if (sess != NULL) {
4248                         if (sess->deleted) {
4249                                 /*
4250                                  * Impatient initiator sent PRLI before last
4251                                  * PLOGI could finish. Will force him to re-try,
4252                                  * while last one finishes.
4253                                  */
4254                                 ql_log(ql_log_warn, sess->vha, 0xf095,
4255                                     "sess %p PRLI received, before plogi ack.\n",
4256                                     sess);
4257                                 qlt_send_term_imm_notif(vha, iocb, 1);
4258                                 res = 0;
4259                                 break;
4260                         }
4261
4262                         /*
4263                          * This shouldn't happen under normal circumstances,
4264                          * since we have deleted the old session during PLOGI
4265                          */
4266                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf096,
4267                             "PRLI (loop_id %#04x) for existing sess %p (loop_id %#04x)\n",
4268                             sess->loop_id, sess, iocb->u.isp24.nport_handle);
4269
4270                         sess->local = 0;
4271                         sess->loop_id = loop_id;
4272                         sess->s_id = port_id;
4273
4274                         if (wd3_lo & BIT_7)
4275                                 sess->conf_compl_supported = 1;
4276
4277                 }
4278                 res = 1; /* send notify ack */
4279
4280                 /* Make session global (not used in fabric mode) */
4281                 if (ha->current_topology != ISP_CFG_F) {
4282                         set_bit(LOOP_RESYNC_NEEDED, &vha->dpc_flags);
4283                         set_bit(LOCAL_LOOP_UPDATE, &vha->dpc_flags);
4284                         qla2xxx_wake_dpc(vha);
4285                 } else {
4286                         /* todo: else - create sess here. */
4287                         res = 1; /* send notify ack */
4288                 }
4289
4290                 break;
4291
4292         case ELS_LOGO:
4293         case ELS_PRLO:
4294                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4295                 break;
4296         case ELS_PDISC:
4297         case ELS_ADISC:
4298         {
4299                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4300                 if (tgt->link_reinit_iocb_pending) {
4301                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4302                             0, 0, 0, 0, 0, 0);
4303                         tgt->link_reinit_iocb_pending = 0;
4304                 }
4305                 res = 1; /* send notify ack */
4306                 break;
4307         }
4308
4309         case ELS_FLOGI: /* should never happen */
4310         default:
4311                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
4312                     "qla_target(%d): Unsupported ELS command %x "
4313                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
4314                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
4315                 break;
4316         }
4317
4318         return res;
4319 }
4320
4321 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
4322 {
4323 #if 1
4324         /*
4325          * FIXME: Reject non zero SRR relative offset until we can test
4326          * this code properly.
4327          */
4328         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
4329         return -1;
4330 #else
4331         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
4332         size_t first_offset = 0, rem_offset = offset, tmp = 0;
4333         int i, sg_srr_cnt, bufflen = 0;
4334
4335         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
4336             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
4337             "cmd->sg_cnt: %u, direction: %d\n",
4338             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
4339
4340         if (!cmd->sg || !cmd->sg_cnt) {
4341                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
4342                     "Missing cmd->sg or zero cmd->sg_cnt in"
4343                     " qla_tgt_set_data_offset\n");
4344                 return -EINVAL;
4345         }
4346         /*
4347          * Walk the current cmd->sg list until we locate the new sg_srr_start
4348          */
4349         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
4350                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
4351                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
4352                     i, sg, sg_page(sg), sg->length, sg->offset);
4353
4354                 if ((sg->length + tmp) > offset) {
4355                         first_offset = rem_offset;
4356                         sg_srr_start = sg;
4357                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
4358                             "Found matching sg[%d], using %p as sg_srr_start, "
4359                             "and using first_offset: %zu\n", i, sg,
4360                             first_offset);
4361                         break;
4362                 }
4363                 tmp += sg->length;
4364                 rem_offset -= sg->length;
4365         }
4366
4367         if (!sg_srr_start) {
4368                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
4369                     "Unable to locate sg_srr_start for offset: %u\n", offset);
4370                 return -EINVAL;
4371         }
4372         sg_srr_cnt = (cmd->sg_cnt - i);
4373
4374         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
4375         if (!sg_srr) {
4376                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
4377                     "Unable to allocate sgp\n");
4378                 return -ENOMEM;
4379         }
4380         sg_init_table(sg_srr, sg_srr_cnt);
4381         sgp = &sg_srr[0];
4382         /*
4383          * Walk the remaining list for sg_srr_start, mapping to the newly
4384          * allocated sg_srr taking first_offset into account.
4385          */
4386         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
4387                 if (first_offset) {
4388                         sg_set_page(sgp, sg_page(sg),
4389                             (sg->length - first_offset), first_offset);
4390                         first_offset = 0;
4391                 } else {
4392                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
4393                 }
4394                 bufflen += sgp->length;
4395
4396                 sgp = sg_next(sgp);
4397                 if (!sgp)
4398                         break;
4399         }
4400
4401         cmd->sg = sg_srr;
4402         cmd->sg_cnt = sg_srr_cnt;
4403         cmd->bufflen = bufflen;
4404         cmd->offset += offset;
4405         cmd->free_sg = 1;
4406
4407         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
4408         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
4409             cmd->sg_cnt);
4410         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
4411             cmd->bufflen);
4412         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
4413             cmd->offset);
4414
4415         if (cmd->sg_cnt < 0)
4416                 BUG();
4417
4418         if (cmd->bufflen < 0)
4419                 BUG();
4420
4421         return 0;
4422 #endif
4423 }
4424
4425 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
4426         uint32_t srr_rel_offs, int *xmit_type)
4427 {
4428         int res = 0, rel_offs;
4429
4430         rel_offs = srr_rel_offs - cmd->offset;
4431         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
4432             srr_rel_offs, rel_offs);
4433
4434         *xmit_type = QLA_TGT_XMIT_ALL;
4435
4436         if (rel_offs < 0) {
4437                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
4438                     "qla_target(%d): SRR rel_offs (%d) < 0",
4439                     cmd->vha->vp_idx, rel_offs);
4440                 res = -1;
4441         } else if (rel_offs == cmd->bufflen)
4442                 *xmit_type = QLA_TGT_XMIT_STATUS;
4443         else if (rel_offs > 0)
4444                 res = qlt_set_data_offset(cmd, rel_offs);
4445
4446         return res;
4447 }
4448
4449 /* No locks, thread context */
4450 static void qlt_handle_srr(struct scsi_qla_host *vha,
4451         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
4452 {
4453         struct imm_ntfy_from_isp *ntfy =
4454             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
4455         struct qla_hw_data *ha = vha->hw;
4456         struct qla_tgt_cmd *cmd = sctio->cmd;
4457         struct se_cmd *se_cmd = &cmd->se_cmd;
4458         unsigned long flags;
4459         int xmit_type = 0, resp = 0;
4460         uint32_t offset;
4461         uint16_t srr_ui;
4462
4463         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
4464         srr_ui = ntfy->u.isp24.srr_ui;
4465
4466         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
4467             cmd, srr_ui);
4468
4469         switch (srr_ui) {
4470         case SRR_IU_STATUS:
4471                 spin_lock_irqsave(&ha->hardware_lock, flags);
4472                 qlt_send_notify_ack(vha, ntfy,
4473                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4474                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4475                 xmit_type = QLA_TGT_XMIT_STATUS;
4476                 resp = 1;
4477                 break;
4478         case SRR_IU_DATA_IN:
4479                 if (!cmd->sg || !cmd->sg_cnt) {
4480                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
4481                             "Unable to process SRR_IU_DATA_IN due to"
4482                             " missing cmd->sg, state: %d\n", cmd->state);
4483                         dump_stack();
4484                         goto out_reject;
4485                 }
4486                 if (se_cmd->scsi_status != 0) {
4487                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
4488                             "Rejecting SRR_IU_DATA_IN with non GOOD "
4489                             "scsi_status\n");
4490                         goto out_reject;
4491                 }
4492                 cmd->bufflen = se_cmd->data_length;
4493
4494                 if (qlt_has_data(cmd)) {
4495                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4496                                 goto out_reject;
4497                         spin_lock_irqsave(&ha->hardware_lock, flags);
4498                         qlt_send_notify_ack(vha, ntfy,
4499                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4500                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4501                         resp = 1;
4502                 } else {
4503                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
4504                                "qla_target(%d): SRR for in data for cmd without them (tag %lld, SCSI status %d), reject",
4505                                vha->vp_idx, se_cmd->tag,
4506                             cmd->se_cmd.scsi_status);
4507                         goto out_reject;
4508                 }
4509                 break;
4510         case SRR_IU_DATA_OUT:
4511                 if (!cmd->sg || !cmd->sg_cnt) {
4512                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
4513                             "Unable to process SRR_IU_DATA_OUT due to"
4514                             " missing cmd->sg\n");
4515                         dump_stack();
4516                         goto out_reject;
4517                 }
4518                 if (se_cmd->scsi_status != 0) {
4519                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
4520                             "Rejecting SRR_IU_DATA_OUT"
4521                             " with non GOOD scsi_status\n");
4522                         goto out_reject;
4523                 }
4524                 cmd->bufflen = se_cmd->data_length;
4525
4526                 if (qlt_has_data(cmd)) {
4527                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
4528                                 goto out_reject;
4529                         spin_lock_irqsave(&ha->hardware_lock, flags);
4530                         qlt_send_notify_ack(vha, ntfy,
4531                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
4532                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4533                         if (xmit_type & QLA_TGT_XMIT_DATA) {
4534                                 cmd->cmd_flags |= BIT_8;
4535                                 qlt_rdy_to_xfer(cmd);
4536                         }
4537                 } else {
4538                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
4539                             "qla_target(%d): SRR for out data for cmd without them (tag %lld, SCSI status %d), reject",
4540                                vha->vp_idx, se_cmd->tag, cmd->se_cmd.scsi_status);
4541                         goto out_reject;
4542                 }
4543                 break;
4544         default:
4545                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
4546                     "qla_target(%d): Unknown srr_ui value %x",
4547                     vha->vp_idx, srr_ui);
4548                 goto out_reject;
4549         }
4550
4551         /* Transmit response in case of status and data-in cases */
4552         if (resp) {
4553                 cmd->cmd_flags |= BIT_7;
4554                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
4555         }
4556
4557         return;
4558
4559 out_reject:
4560         spin_lock_irqsave(&ha->hardware_lock, flags);
4561         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
4562             NOTIFY_ACK_SRR_FLAGS_REJECT,
4563             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4564             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4565         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
4566                 cmd->state = QLA_TGT_STATE_DATA_IN;
4567                 dump_stack();
4568         } else {
4569                 cmd->cmd_flags |= BIT_9;
4570                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
4571         }
4572         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4573 }
4574
4575 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
4576         struct qla_tgt_srr_imm *imm, int ha_locked)
4577 {
4578         struct qla_hw_data *ha = vha->hw;
4579         unsigned long flags = 0;
4580
4581         if (!ha_locked)
4582                 spin_lock_irqsave(&ha->hardware_lock, flags);
4583
4584         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
4585             NOTIFY_ACK_SRR_FLAGS_REJECT,
4586             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4587             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4588
4589         if (!ha_locked)
4590                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4591
4592         kfree(imm);
4593 }
4594
4595 static void qlt_handle_srr_work(struct work_struct *work)
4596 {
4597         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
4598         struct scsi_qla_host *vha = tgt->vha;
4599         struct qla_tgt_srr_ctio *sctio;
4600         unsigned long flags;
4601
4602         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
4603             tgt);
4604
4605 restart:
4606         spin_lock_irqsave(&tgt->srr_lock, flags);
4607         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4608                 struct qla_tgt_srr_imm *imm, *i, *ti;
4609                 struct qla_tgt_cmd *cmd;
4610                 struct se_cmd *se_cmd;
4611
4612                 imm = NULL;
4613                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4614                                                 srr_list_entry) {
4615                         if (i->srr_id == sctio->srr_id) {
4616                                 list_del(&i->srr_list_entry);
4617                                 if (imm) {
4618                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4619                                           "qla_target(%d): There must be "
4620                                           "only one IMM SRR per CTIO SRR "
4621                                           "(IMM SRR %p, id %d, CTIO %p\n",
4622                                           vha->vp_idx, i, i->srr_id, sctio);
4623                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4624                                 } else
4625                                         imm = i;
4626                         }
4627                 }
4628
4629                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4630                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4631                     sctio->srr_id);
4632
4633                 if (imm == NULL) {
4634                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4635                             "Not found matching IMM for SRR CTIO (id %d)\n",
4636                             sctio->srr_id);
4637                         continue;
4638                 } else
4639                         list_del(&sctio->srr_list_entry);
4640
4641                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4642
4643                 cmd = sctio->cmd;
4644                 /*
4645                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4646                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4647                  * logic..
4648                  */
4649                 cmd->offset = 0;
4650                 if (cmd->free_sg) {
4651                         kfree(cmd->sg);
4652                         cmd->sg = NULL;
4653                         cmd->free_sg = 0;
4654                 }
4655                 se_cmd = &cmd->se_cmd;
4656
4657                 cmd->sg_cnt = se_cmd->t_data_nents;
4658                 cmd->sg = se_cmd->t_data_sg;
4659
4660                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4661                        "SRR cmd %p (se_cmd %p, tag %lld, op %x), sg_cnt=%d, offset=%d",
4662                        cmd, &cmd->se_cmd, se_cmd->tag, se_cmd->t_task_cdb ?
4663                        se_cmd->t_task_cdb[0] : 0, cmd->sg_cnt, cmd->offset);
4664
4665                 qlt_handle_srr(vha, sctio, imm);
4666
4667                 kfree(imm);
4668                 kfree(sctio);
4669                 goto restart;
4670         }
4671         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4672 }
4673
4674 /* ha->hardware_lock supposed to be held on entry */
4675 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4676         struct imm_ntfy_from_isp *iocb)
4677 {
4678         struct qla_tgt_srr_imm *imm;
4679         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4680         struct qla_tgt_srr_ctio *sctio;
4681
4682         tgt->imm_srr_id++;
4683
4684         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4685             vha->vp_idx);
4686
4687         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4688         if (imm != NULL) {
4689                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4690
4691                 /* IRQ is already OFF */
4692                 spin_lock(&tgt->srr_lock);
4693                 imm->srr_id = tgt->imm_srr_id;
4694                 list_add_tail(&imm->srr_list_entry,
4695                     &tgt->srr_imm_list);
4696                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4697                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4698                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4699                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4700                         int found = 0;
4701                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4702                             srr_list_entry) {
4703                                 if (sctio->srr_id == imm->srr_id) {
4704                                         found = 1;
4705                                         break;
4706                                 }
4707                         }
4708                         if (found) {
4709                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4710                                     "Scheduling srr work\n");
4711                                 schedule_work(&tgt->srr_work);
4712                         } else {
4713                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4714                                     "qla_target(%d): imm_srr_id "
4715                                     "== ctio_srr_id (%d), but there is no "
4716                                     "corresponding SRR CTIO, deleting IMM "
4717                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4718                                     imm);
4719                                 list_del(&imm->srr_list_entry);
4720
4721                                 kfree(imm);
4722
4723                                 spin_unlock(&tgt->srr_lock);
4724                                 goto out_reject;
4725                         }
4726                 }
4727                 spin_unlock(&tgt->srr_lock);
4728         } else {
4729                 struct qla_tgt_srr_ctio *ts;
4730
4731                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4732                     "qla_target(%d): Unable to allocate SRR IMM "
4733                     "entry, SRR request will be rejected\n", vha->vp_idx);
4734
4735                 /* IRQ is already OFF */
4736                 spin_lock(&tgt->srr_lock);
4737                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4738                     srr_list_entry) {
4739                         if (sctio->srr_id == tgt->imm_srr_id) {
4740                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4741                                     "CTIO SRR %p deleted (id %d)\n",
4742                                     sctio, sctio->srr_id);
4743                                 list_del(&sctio->srr_list_entry);
4744                                 qlt_send_term_exchange(vha, sctio->cmd,
4745                                     &sctio->cmd->atio, 1);
4746                                 kfree(sctio);
4747                         }
4748                 }
4749                 spin_unlock(&tgt->srr_lock);
4750                 goto out_reject;
4751         }
4752
4753         return;
4754
4755 out_reject:
4756         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4757             NOTIFY_ACK_SRR_FLAGS_REJECT,
4758             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4759             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4760 }
4761
4762 /*
4763  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4764  */
4765 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4766         struct imm_ntfy_from_isp *iocb)
4767 {
4768         struct qla_hw_data *ha = vha->hw;
4769         uint32_t add_flags = 0;
4770         int send_notify_ack = 1;
4771         uint16_t status;
4772
4773         status = le16_to_cpu(iocb->u.isp2x.status);
4774         switch (status) {
4775         case IMM_NTFY_LIP_RESET:
4776         {
4777                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4778                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4779                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4780                     iocb->u.isp24.status_subcode);
4781
4782                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4783                         send_notify_ack = 0;
4784                 break;
4785         }
4786
4787         case IMM_NTFY_LIP_LINK_REINIT:
4788         {
4789                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4790                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4791                     "qla_target(%d): LINK REINIT (loop %#x, "
4792                     "subcode %x)\n", vha->vp_idx,
4793                     le16_to_cpu(iocb->u.isp24.nport_handle),
4794                     iocb->u.isp24.status_subcode);
4795                 if (tgt->link_reinit_iocb_pending) {
4796                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4797                             0, 0, 0, 0, 0, 0);
4798                 }
4799                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4800                 tgt->link_reinit_iocb_pending = 1;
4801                 /*
4802                  * QLogic requires to wait after LINK REINIT for possible
4803                  * PDISC or ADISC ELS commands
4804                  */
4805                 send_notify_ack = 0;
4806                 break;
4807         }
4808
4809         case IMM_NTFY_PORT_LOGOUT:
4810                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4811                     "qla_target(%d): Port logout (loop "
4812                     "%#x, subcode %x)\n", vha->vp_idx,
4813                     le16_to_cpu(iocb->u.isp24.nport_handle),
4814                     iocb->u.isp24.status_subcode);
4815
4816                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4817                         send_notify_ack = 0;
4818                 /* The sessions will be cleared in the callback, if needed */
4819                 break;
4820
4821         case IMM_NTFY_GLBL_TPRLO:
4822                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4823                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4824                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4825                         send_notify_ack = 0;
4826                 /* The sessions will be cleared in the callback, if needed */
4827                 break;
4828
4829         case IMM_NTFY_PORT_CONFIG:
4830                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4831                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4832                     status);
4833                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4834                         send_notify_ack = 0;
4835                 /* The sessions will be cleared in the callback, if needed */
4836                 break;
4837
4838         case IMM_NTFY_GLBL_LOGO:
4839                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4840                     "qla_target(%d): Link failure detected\n",
4841                     vha->vp_idx);
4842                 /* I_T nexus loss */
4843                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4844                         send_notify_ack = 0;
4845                 break;
4846
4847         case IMM_NTFY_IOCB_OVERFLOW:
4848                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4849                     "qla_target(%d): Cannot provide requested "
4850                     "capability (IOCB overflowed the immediate notify "
4851                     "resource count)\n", vha->vp_idx);
4852                 break;
4853
4854         case IMM_NTFY_ABORT_TASK:
4855                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4856                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4857                     "L %#x)\n", vha->vp_idx,
4858                     le16_to_cpu(iocb->u.isp2x.seq_id),
4859                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4860                     le16_to_cpu(iocb->u.isp2x.lun));
4861                 if (qlt_abort_task(vha, iocb) == 0)
4862                         send_notify_ack = 0;
4863                 break;
4864
4865         case IMM_NTFY_RESOURCE:
4866                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4867                     "qla_target(%d): Out of resources, host %ld\n",
4868                     vha->vp_idx, vha->host_no);
4869                 break;
4870
4871         case IMM_NTFY_MSG_RX:
4872                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4873                     "qla_target(%d): Immediate notify task %x\n",
4874                     vha->vp_idx, iocb->u.isp2x.task_flags);
4875                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4876                         send_notify_ack = 0;
4877                 break;
4878
4879         case IMM_NTFY_ELS:
4880                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4881                         send_notify_ack = 0;
4882                 break;
4883
4884         case IMM_NTFY_SRR:
4885                 qlt_prepare_srr_imm(vha, iocb);
4886                 send_notify_ack = 0;
4887                 break;
4888
4889         default:
4890                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4891                     "qla_target(%d): Received unknown immediate "
4892                     "notify status %x\n", vha->vp_idx, status);
4893                 break;
4894         }
4895
4896         if (send_notify_ack)
4897                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4898 }
4899
4900 /*
4901  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4902  * This function sends busy to ISP 2xxx or 24xx.
4903  */
4904 static int __qlt_send_busy(struct scsi_qla_host *vha,
4905         struct atio_from_isp *atio, uint16_t status)
4906 {
4907         struct ctio7_to_24xx *ctio24;
4908         struct qla_hw_data *ha = vha->hw;
4909         request_t *pkt;
4910         struct qla_tgt_sess *sess = NULL;
4911
4912         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4913             atio->u.isp24.fcp_hdr.s_id);
4914         if (!sess) {
4915                 qlt_send_term_exchange(vha, NULL, atio, 1);
4916                 return 0;
4917         }
4918         /* Sending marker isn't necessary, since we called from ISR */
4919
4920         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4921         if (!pkt) {
4922                 ql_dbg(ql_dbg_io, vha, 0x3063,
4923                     "qla_target(%d): %s failed: unable to allocate "
4924                     "request packet", vha->vp_idx, __func__);
4925                 return -ENOMEM;
4926         }
4927
4928         pkt->entry_count = 1;
4929         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4930
4931         ctio24 = (struct ctio7_to_24xx *)pkt;
4932         ctio24->entry_type = CTIO_TYPE7;
4933         ctio24->nport_handle = sess->loop_id;
4934         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4935         ctio24->vp_index = vha->vp_idx;
4936         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4937         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4938         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4939         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4940         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4941             __constant_cpu_to_le16(
4942                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4943                 CTIO7_FLAGS_DONT_RET_CTIO);
4944         /*
4945          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4946          * if the explicit conformation is used.
4947          */
4948         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4949         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4950         /* Memory Barrier */
4951         wmb();
4952         qla2x00_start_iocbs(vha, vha->req);
4953         return 0;
4954 }
4955
4956 /*
4957  * This routine is used to allocate a command for either a QFull condition
4958  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4959  * out previously.
4960  */
4961 static void
4962 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4963         struct atio_from_isp *atio, uint16_t status, int qfull)
4964 {
4965         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4966         struct qla_hw_data *ha = vha->hw;
4967         struct qla_tgt_sess *sess;
4968         struct se_session *se_sess;
4969         struct qla_tgt_cmd *cmd;
4970         int tag;
4971
4972         if (unlikely(tgt->tgt_stop)) {
4973                 ql_dbg(ql_dbg_io, vha, 0x300a,
4974                         "New command while device %p is shutting down\n", tgt);
4975                 return;
4976         }
4977
4978         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4979                 vha->hw->tgt.num_qfull_cmds_dropped++;
4980                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4981                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4982                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4983                                 vha->hw->tgt.num_qfull_cmds_dropped;
4984
4985                 ql_dbg(ql_dbg_io, vha, 0x3068,
4986                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4987                         vha->vp_idx, __func__,
4988                         vha->hw->tgt.num_qfull_cmds_dropped);
4989
4990                 qlt_chk_exch_leak_thresh_hold(vha);
4991                 return;
4992         }
4993
4994         sess = ha->tgt.tgt_ops->find_sess_by_s_id
4995                 (vha, atio->u.isp24.fcp_hdr.s_id);
4996         if (!sess)
4997                 return;
4998
4999         se_sess = sess->se_sess;
5000
5001         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
5002         if (tag < 0)
5003                 return;
5004
5005         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
5006         if (!cmd) {
5007                 ql_dbg(ql_dbg_io, vha, 0x3009,
5008                         "qla_target(%d): %s: Allocation of cmd failed\n",
5009                         vha->vp_idx, __func__);
5010
5011                 vha->hw->tgt.num_qfull_cmds_dropped++;
5012                 if (vha->hw->tgt.num_qfull_cmds_dropped >
5013                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
5014                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
5015                                 vha->hw->tgt.num_qfull_cmds_dropped;
5016
5017                 qlt_chk_exch_leak_thresh_hold(vha);
5018                 return;
5019         }
5020
5021         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
5022
5023         qlt_incr_num_pend_cmds(vha);
5024         INIT_LIST_HEAD(&cmd->cmd_list);
5025         memcpy(&cmd->atio, atio, sizeof(*atio));
5026
5027         cmd->tgt = vha->vha_tgt.qla_tgt;
5028         cmd->vha = vha;
5029         cmd->reset_count = vha->hw->chip_reset;
5030         cmd->q_full = 1;
5031
5032         if (qfull) {
5033                 cmd->q_full = 1;
5034                 /* NOTE: borrowing the state field to carry the status */
5035                 cmd->state = status;
5036         } else
5037                 cmd->term_exchg = 1;
5038
5039         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
5040
5041         vha->hw->tgt.num_qfull_cmds_alloc++;
5042         if (vha->hw->tgt.num_qfull_cmds_alloc >
5043                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
5044                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
5045                         vha->hw->tgt.num_qfull_cmds_alloc;
5046 }
5047
5048 int
5049 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
5050 {
5051         struct qla_hw_data *ha = vha->hw;
5052         unsigned long flags;
5053         struct qla_tgt_cmd *cmd, *tcmd;
5054         struct list_head free_list;
5055         int rc = 0;
5056
5057         if (list_empty(&ha->tgt.q_full_list))
5058                 return 0;
5059
5060         INIT_LIST_HEAD(&free_list);
5061
5062         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
5063
5064         if (list_empty(&ha->tgt.q_full_list)) {
5065                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5066                 return 0;
5067         }
5068
5069         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
5070                 if (cmd->q_full)
5071                         /* cmd->state is a borrowed field to hold status */
5072                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
5073                 else if (cmd->term_exchg)
5074                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
5075
5076                 if (rc == -ENOMEM)
5077                         break;
5078
5079                 if (cmd->q_full)
5080                         ql_dbg(ql_dbg_io, vha, 0x3006,
5081                             "%s: busy sent for ox_id[%04x]\n", __func__,
5082                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5083                 else if (cmd->term_exchg)
5084                         ql_dbg(ql_dbg_io, vha, 0x3007,
5085                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
5086                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
5087                 else
5088                         ql_dbg(ql_dbg_io, vha, 0x3008,
5089                             "%s: Unexpected cmd in QFull list %p\n", __func__,
5090                             cmd);
5091
5092                 list_del(&cmd->cmd_list);
5093                 list_add_tail(&cmd->cmd_list, &free_list);
5094
5095                 /* piggy back on hardware_lock for protection */
5096                 vha->hw->tgt.num_qfull_cmds_alloc--;
5097         }
5098         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
5099
5100         cmd = NULL;
5101
5102         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
5103                 list_del(&cmd->cmd_list);
5104                 /* This cmd was never sent to TCM.  There is no need
5105                  * to schedule free or call free_cmd
5106                  */
5107                 qlt_free_cmd(cmd);
5108         }
5109         return rc;
5110 }
5111
5112 static void
5113 qlt_send_busy(struct scsi_qla_host *vha,
5114         struct atio_from_isp *atio, uint16_t status)
5115 {
5116         int rc = 0;
5117
5118         rc = __qlt_send_busy(vha, atio, status);
5119         if (rc == -ENOMEM)
5120                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
5121 }
5122
5123 static int
5124 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
5125         struct atio_from_isp *atio)
5126 {
5127         struct qla_hw_data *ha = vha->hw;
5128         uint16_t status;
5129
5130         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
5131                 return 0;
5132
5133         status = temp_sam_status;
5134         qlt_send_busy(vha, atio, status);
5135         return 1;
5136 }
5137
5138 /* ha->hardware_lock supposed to be held on entry */
5139 /* called via callback from qla2xxx */
5140 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
5141         struct atio_from_isp *atio)
5142 {
5143         struct qla_hw_data *ha = vha->hw;
5144         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5145         int rc;
5146
5147         if (unlikely(tgt == NULL)) {
5148                 ql_dbg(ql_dbg_io, vha, 0x3064,
5149                     "ATIO pkt, but no tgt (ha %p)", ha);
5150                 return;
5151         }
5152         /*
5153          * In tgt_stop mode we also should allow all requests to pass.
5154          * Otherwise, some commands can stuck.
5155          */
5156
5157         tgt->irq_cmd_count++;
5158
5159         switch (atio->u.raw.entry_type) {
5160         case ATIO_TYPE7:
5161                 if (unlikely(atio->u.isp24.exchange_addr ==
5162                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
5163                         ql_dbg(ql_dbg_io, vha, 0x3065,
5164                             "qla_target(%d): ATIO_TYPE7 "
5165                             "received with UNKNOWN exchange address, "
5166                             "sending QUEUE_FULL\n", vha->vp_idx);
5167                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
5168                         break;
5169                 }
5170
5171
5172
5173                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
5174                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
5175                         if (rc != 0) {
5176                                 tgt->irq_cmd_count--;
5177                                 return;
5178                         }
5179                         rc = qlt_handle_cmd_for_atio(vha, atio);
5180                 } else {
5181                         rc = qlt_handle_task_mgmt(vha, atio);
5182                 }
5183                 if (unlikely(rc != 0)) {
5184                         if (rc == -ESRCH) {
5185 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5186                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5187 #else
5188                                 qlt_send_term_exchange(vha, NULL, atio, 1);
5189 #endif
5190                         } else {
5191                                 if (tgt->tgt_stop) {
5192                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
5193                                             "qla_target: Unable to send "
5194                                             "command to target for req, "
5195                                             "ignoring.\n");
5196                                 } else {
5197                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
5198                                             "qla_target(%d): Unable to send "
5199                                             "command to target, sending BUSY "
5200                                             "status.\n", vha->vp_idx);
5201                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
5202                                 }
5203                         }
5204                 }
5205                 break;
5206
5207         case IMMED_NOTIFY_TYPE:
5208         {
5209                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
5210                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
5211                             "qla_target(%d): Received ATIO packet %x "
5212                             "with error status %x\n", vha->vp_idx,
5213                             atio->u.raw.entry_type,
5214                             atio->u.isp2x.entry_status);
5215                         break;
5216                 }
5217                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
5218                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
5219                 break;
5220         }
5221
5222         default:
5223                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
5224                     "qla_target(%d): Received unknown ATIO atio "
5225                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
5226                 break;
5227         }
5228
5229         tgt->irq_cmd_count--;
5230 }
5231
5232 /* ha->hardware_lock supposed to be held on entry */
5233 /* called via callback from qla2xxx */
5234 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
5235 {
5236         struct qla_hw_data *ha = vha->hw;
5237         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5238
5239         if (unlikely(tgt == NULL)) {
5240                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
5241                     "qla_target(%d): Response pkt %x received, but no "
5242                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
5243                 return;
5244         }
5245
5246         /*
5247          * In tgt_stop mode we also should allow all requests to pass.
5248          * Otherwise, some commands can stuck.
5249          */
5250
5251         tgt->irq_cmd_count++;
5252
5253         switch (pkt->entry_type) {
5254         case CTIO_CRC2:
5255         case CTIO_TYPE7:
5256         {
5257                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
5258                 qlt_do_ctio_completion(vha, entry->handle,
5259                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5260                     entry);
5261                 break;
5262         }
5263
5264         case ACCEPT_TGT_IO_TYPE:
5265         {
5266                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
5267                 int rc;
5268                 if (atio->u.isp2x.status !=
5269                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
5270                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
5271                             "qla_target(%d): ATIO with error "
5272                             "status %x received\n", vha->vp_idx,
5273                             le16_to_cpu(atio->u.isp2x.status));
5274                         break;
5275                 }
5276
5277                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
5278                 if (rc != 0) {
5279                         tgt->irq_cmd_count--;
5280                         return;
5281                 }
5282
5283                 rc = qlt_handle_cmd_for_atio(vha, atio);
5284                 if (unlikely(rc != 0)) {
5285                         if (rc == -ESRCH) {
5286 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
5287                                 qlt_send_busy(vha, atio, 0);
5288 #else
5289                                 qlt_send_term_exchange(vha, NULL, atio, 1);
5290 #endif
5291                         } else {
5292                                 if (tgt->tgt_stop) {
5293                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
5294                                             "qla_target: Unable to send "
5295                                             "command to target, sending TERM "
5296                                             "EXCHANGE for rsp\n");
5297                                         qlt_send_term_exchange(vha, NULL,
5298                                             atio, 1);
5299                                 } else {
5300                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
5301                                             "qla_target(%d): Unable to send "
5302                                             "command to target, sending BUSY "
5303                                             "status\n", vha->vp_idx);
5304                                         qlt_send_busy(vha, atio, 0);
5305                                 }
5306                         }
5307                 }
5308         }
5309         break;
5310
5311         case CONTINUE_TGT_IO_TYPE:
5312         {
5313                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5314                 qlt_do_ctio_completion(vha, entry->handle,
5315                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5316                     entry);
5317                 break;
5318         }
5319
5320         case CTIO_A64_TYPE:
5321         {
5322                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
5323                 qlt_do_ctio_completion(vha, entry->handle,
5324                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
5325                     entry);
5326                 break;
5327         }
5328
5329         case IMMED_NOTIFY_TYPE:
5330                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
5331                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
5332                 break;
5333
5334         case NOTIFY_ACK_TYPE:
5335                 if (tgt->notify_ack_expected > 0) {
5336                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
5337                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
5338                             "NOTIFY_ACK seq %08x status %x\n",
5339                             le16_to_cpu(entry->u.isp2x.seq_id),
5340                             le16_to_cpu(entry->u.isp2x.status));
5341                         tgt->notify_ack_expected--;
5342                         if (entry->u.isp2x.status !=
5343                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
5344                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
5345                                     "qla_target(%d): NOTIFY_ACK "
5346                                     "failed %x\n", vha->vp_idx,
5347                                     le16_to_cpu(entry->u.isp2x.status));
5348                         }
5349                 } else {
5350                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
5351                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
5352                             vha->vp_idx);
5353                 }
5354                 break;
5355
5356         case ABTS_RECV_24XX:
5357                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
5358                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
5359                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
5360                 break;
5361
5362         case ABTS_RESP_24XX:
5363                 if (tgt->abts_resp_expected > 0) {
5364                         struct abts_resp_from_24xx_fw *entry =
5365                                 (struct abts_resp_from_24xx_fw *)pkt;
5366                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
5367                             "ABTS_RESP_24XX: compl_status %x\n",
5368                             entry->compl_status);
5369                         tgt->abts_resp_expected--;
5370                         if (le16_to_cpu(entry->compl_status) !=
5371                             ABTS_RESP_COMPL_SUCCESS) {
5372                                 if ((entry->error_subcode1 == 0x1E) &&
5373                                     (entry->error_subcode2 == 0)) {
5374                                         /*
5375                                          * We've got a race here: aborted
5376                                          * exchange not terminated, i.e.
5377                                          * response for the aborted command was
5378                                          * sent between the abort request was
5379                                          * received and processed.
5380                                          * Unfortunately, the firmware has a
5381                                          * silly requirement that all aborted
5382                                          * exchanges must be explicitely
5383                                          * terminated, otherwise it refuses to
5384                                          * send responses for the abort
5385                                          * requests. So, we have to
5386                                          * (re)terminate the exchange and retry
5387                                          * the abort response.
5388                                          */
5389                                         qlt_24xx_retry_term_exchange(vha,
5390                                             entry);
5391                                 } else
5392                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
5393                                             "qla_target(%d): ABTS_RESP_24XX "
5394                                             "failed %x (subcode %x:%x)",
5395                                             vha->vp_idx, entry->compl_status,
5396                                             entry->error_subcode1,
5397                                             entry->error_subcode2);
5398                         }
5399                 } else {
5400                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
5401                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
5402                             "received\n", vha->vp_idx);
5403                 }
5404                 break;
5405
5406         default:
5407                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
5408                     "qla_target(%d): Received unknown response pkt "
5409                     "type %x\n", vha->vp_idx, pkt->entry_type);
5410                 break;
5411         }
5412
5413         tgt->irq_cmd_count--;
5414 }
5415
5416 /*
5417  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
5418  */
5419 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
5420         uint16_t *mailbox)
5421 {
5422         struct qla_hw_data *ha = vha->hw;
5423         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5424         int login_code;
5425
5426         if (!ha->tgt.tgt_ops)
5427                 return;
5428
5429         if (unlikely(tgt == NULL)) {
5430                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
5431                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
5432                 return;
5433         }
5434
5435         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
5436             IS_QLA2100(ha))
5437                 return;
5438         /*
5439          * In tgt_stop mode we also should allow all requests to pass.
5440          * Otherwise, some commands can stuck.
5441          */
5442
5443         tgt->irq_cmd_count++;
5444
5445         switch (code) {
5446         case MBA_RESET:                 /* Reset */
5447         case MBA_SYSTEM_ERR:            /* System Error */
5448         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
5449         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
5450                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
5451                     "qla_target(%d): System error async event %#x "
5452                     "occurred", vha->vp_idx, code);
5453                 break;
5454         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
5455                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5456                 break;
5457
5458         case MBA_LOOP_UP:
5459         {
5460                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
5461                     "qla_target(%d): Async LOOP_UP occurred "
5462                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
5463                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5464                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5465                 if (tgt->link_reinit_iocb_pending) {
5466                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
5467                             0, 0, 0, 0, 0, 0);
5468                         tgt->link_reinit_iocb_pending = 0;
5469                 }
5470                 break;
5471         }
5472
5473         case MBA_LIP_OCCURRED:
5474         case MBA_LOOP_DOWN:
5475         case MBA_LIP_RESET:
5476         case MBA_RSCN_UPDATE:
5477                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
5478                     "qla_target(%d): Async event %#x occurred "
5479                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5480                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5481                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5482                 break;
5483
5484         case MBA_PORT_UPDATE:
5485                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
5486                     "qla_target(%d): Port update async event %#x "
5487                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
5488                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
5489                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
5490                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
5491
5492                 login_code = le16_to_cpu(mailbox[2]);
5493                 if (login_code == 0x4)
5494                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
5495                             "Async MB 2: Got PLOGI Complete\n");
5496                 else if (login_code == 0x7)
5497                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
5498                             "Async MB 2: Port Logged Out\n");
5499                 break;
5500
5501         default:
5502                 break;
5503         }
5504
5505         tgt->irq_cmd_count--;
5506 }
5507
5508 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
5509         uint16_t loop_id)
5510 {
5511         fc_port_t *fcport;
5512         int rc;
5513
5514         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
5515         if (!fcport) {
5516                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
5517                     "qla_target(%d): Allocation of tmp FC port failed",
5518                     vha->vp_idx);
5519                 return NULL;
5520         }
5521
5522         fcport->loop_id = loop_id;
5523
5524         rc = qla2x00_get_port_database(vha, fcport, 0);
5525         if (rc != QLA_SUCCESS) {
5526                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
5527                     "qla_target(%d): Failed to retrieve fcport "
5528                     "information -- get_port_database() returned %x "
5529                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
5530                 kfree(fcport);
5531                 return NULL;
5532         }
5533
5534         return fcport;
5535 }
5536
5537 /* Must be called under tgt_mutex */
5538 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
5539         uint8_t *s_id)
5540 {
5541         struct qla_tgt_sess *sess = NULL;
5542         fc_port_t *fcport = NULL;
5543         int rc, global_resets;
5544         uint16_t loop_id = 0;
5545
5546 retry:
5547         global_resets =
5548             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
5549
5550         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
5551         if (rc != 0) {
5552                 if ((s_id[0] == 0xFF) &&
5553                     (s_id[1] == 0xFC)) {
5554                         /*
5555                          * This is Domain Controller, so it should be
5556                          * OK to drop SCSI commands from it.
5557                          */
5558                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
5559                             "Unable to find initiator with S_ID %x:%x:%x",
5560                             s_id[0], s_id[1], s_id[2]);
5561                 } else
5562                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
5563                             "qla_target(%d): Unable to find "
5564                             "initiator with S_ID %x:%x:%x",
5565                             vha->vp_idx, s_id[0], s_id[1],
5566                             s_id[2]);
5567                 return NULL;
5568         }
5569
5570         fcport = qlt_get_port_database(vha, loop_id);
5571         if (!fcport)
5572                 return NULL;
5573
5574         if (global_resets !=
5575             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
5576                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
5577                     "qla_target(%d): global reset during session discovery "
5578                     "(counter was %d, new %d), retrying", vha->vp_idx,
5579                     global_resets,
5580                     atomic_read(&vha->vha_tgt.
5581                         qla_tgt->tgt_global_resets_count));
5582                 goto retry;
5583         }
5584
5585         sess = qlt_create_sess(vha, fcport, true);
5586
5587         kfree(fcport);
5588         return sess;
5589 }
5590
5591 static void qlt_abort_work(struct qla_tgt *tgt,
5592         struct qla_tgt_sess_work_param *prm)
5593 {
5594         struct scsi_qla_host *vha = tgt->vha;
5595         struct qla_hw_data *ha = vha->hw;
5596         struct qla_tgt_sess *sess = NULL;
5597         unsigned long flags;
5598         uint32_t be_s_id;
5599         uint8_t s_id[3];
5600         int rc;
5601
5602         spin_lock_irqsave(&ha->hardware_lock, flags);
5603
5604         if (tgt->tgt_stop)
5605                 goto out_term;
5606
5607         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5608         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5609         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5610
5611         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5612             (unsigned char *)&be_s_id);
5613         if (!sess) {
5614                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5615
5616                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5617                 sess = qlt_make_local_sess(vha, s_id);
5618                 /* sess has got an extra creation ref */
5619                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5620
5621                 spin_lock_irqsave(&ha->hardware_lock, flags);
5622                 if (!sess)
5623                         goto out_term;
5624         } else {
5625                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5626                         sess = NULL;
5627                         goto out_term;
5628                 }
5629
5630                 kref_get(&sess->se_sess->sess_kref);
5631         }
5632
5633         if (tgt->tgt_stop)
5634                 goto out_term;
5635
5636         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5637         if (rc != 0)
5638                 goto out_term;
5639
5640         ha->tgt.tgt_ops->put_sess(sess);
5641         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5642         return;
5643
5644 out_term:
5645         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5646         if (sess)
5647                 ha->tgt.tgt_ops->put_sess(sess);
5648         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5649 }
5650
5651 static void qlt_tmr_work(struct qla_tgt *tgt,
5652         struct qla_tgt_sess_work_param *prm)
5653 {
5654         struct atio_from_isp *a = &prm->tm_iocb2;
5655         struct scsi_qla_host *vha = tgt->vha;
5656         struct qla_hw_data *ha = vha->hw;
5657         struct qla_tgt_sess *sess = NULL;
5658         unsigned long flags;
5659         uint8_t *s_id = NULL; /* to hide compiler warnings */
5660         int rc;
5661         uint32_t lun, unpacked_lun;
5662         int lun_size, fn;
5663         void *iocb;
5664
5665         spin_lock_irqsave(&ha->hardware_lock, flags);
5666
5667         if (tgt->tgt_stop)
5668                 goto out_term;
5669
5670         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5671         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5672         if (!sess) {
5673                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5674
5675                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5676                 sess = qlt_make_local_sess(vha, s_id);
5677                 /* sess has got an extra creation ref */
5678                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5679
5680                 spin_lock_irqsave(&ha->hardware_lock, flags);
5681                 if (!sess)
5682                         goto out_term;
5683         } else {
5684                 if (sess->deleted == QLA_SESS_DELETION_IN_PROGRESS) {
5685                         sess = NULL;
5686                         goto out_term;
5687                 }
5688
5689                 kref_get(&sess->se_sess->sess_kref);
5690         }
5691
5692         iocb = a;
5693         lun = a->u.isp24.fcp_cmnd.lun;
5694         lun_size = sizeof(lun);
5695         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5696         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5697
5698         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5699         if (rc != 0)
5700                 goto out_term;
5701
5702         ha->tgt.tgt_ops->put_sess(sess);
5703         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5704         return;
5705
5706 out_term:
5707         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5708         if (sess)
5709                 ha->tgt.tgt_ops->put_sess(sess);
5710         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5711 }
5712
5713 static void qlt_sess_work_fn(struct work_struct *work)
5714 {
5715         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5716         struct scsi_qla_host *vha = tgt->vha;
5717         unsigned long flags;
5718
5719         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5720
5721         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5722         while (!list_empty(&tgt->sess_works_list)) {
5723                 struct qla_tgt_sess_work_param *prm = list_entry(
5724                     tgt->sess_works_list.next, typeof(*prm),
5725                     sess_works_list_entry);
5726
5727                 /*
5728                  * This work can be scheduled on several CPUs at time, so we
5729                  * must delete the entry to eliminate double processing
5730                  */
5731                 list_del(&prm->sess_works_list_entry);
5732
5733                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5734
5735                 switch (prm->type) {
5736                 case QLA_TGT_SESS_WORK_ABORT:
5737                         qlt_abort_work(tgt, prm);
5738                         break;
5739                 case QLA_TGT_SESS_WORK_TM:
5740                         qlt_tmr_work(tgt, prm);
5741                         break;
5742                 default:
5743                         BUG_ON(1);
5744                         break;
5745                 }
5746
5747                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5748
5749                 kfree(prm);
5750         }
5751         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5752 }
5753
5754 /* Must be called under tgt_host_action_mutex */
5755 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5756 {
5757         struct qla_tgt *tgt;
5758
5759         if (!QLA_TGT_MODE_ENABLED())
5760                 return 0;
5761
5762         if (!IS_TGT_MODE_CAPABLE(ha)) {
5763                 ql_log(ql_log_warn, base_vha, 0xe070,
5764                     "This adapter does not support target mode.\n");
5765                 return 0;
5766         }
5767
5768         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5769             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5770
5771         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5772
5773         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5774         if (!tgt) {
5775                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5776                     "Unable to allocate struct qla_tgt\n");
5777                 return -ENOMEM;
5778         }
5779
5780         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5781                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5782
5783         tgt->ha = ha;
5784         tgt->vha = base_vha;
5785         init_waitqueue_head(&tgt->waitQ);
5786         INIT_LIST_HEAD(&tgt->sess_list);
5787         INIT_LIST_HEAD(&tgt->del_sess_list);
5788         INIT_DELAYED_WORK(&tgt->sess_del_work,
5789                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5790         spin_lock_init(&tgt->sess_work_lock);
5791         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5792         INIT_LIST_HEAD(&tgt->sess_works_list);
5793         spin_lock_init(&tgt->srr_lock);
5794         INIT_LIST_HEAD(&tgt->srr_ctio_list);
5795         INIT_LIST_HEAD(&tgt->srr_imm_list);
5796         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5797         atomic_set(&tgt->tgt_global_resets_count, 0);
5798
5799         base_vha->vha_tgt.qla_tgt = tgt;
5800
5801         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5802                 "qla_target(%d): using 64 Bit PCI addressing",
5803                 base_vha->vp_idx);
5804         tgt->tgt_enable_64bit_addr = 1;
5805         /* 3 is reserved */
5806         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5807         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5808         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5809
5810         if (base_vha->fc_vport)
5811                 return 0;
5812
5813         mutex_lock(&qla_tgt_mutex);
5814         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5815         mutex_unlock(&qla_tgt_mutex);
5816
5817         return 0;
5818 }
5819
5820 /* Must be called under tgt_host_action_mutex */
5821 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5822 {
5823         if (!vha->vha_tgt.qla_tgt)
5824                 return 0;
5825
5826         if (vha->fc_vport) {
5827                 qlt_release(vha->vha_tgt.qla_tgt);
5828                 return 0;
5829         }
5830
5831         /* free left over qfull cmds */
5832         qlt_init_term_exchange(vha);
5833
5834         mutex_lock(&qla_tgt_mutex);
5835         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5836         mutex_unlock(&qla_tgt_mutex);
5837
5838         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5839             vha->host_no, ha);
5840         qlt_release(vha->vha_tgt.qla_tgt);
5841
5842         return 0;
5843 }
5844
5845 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5846         unsigned char *b)
5847 {
5848         int i;
5849
5850         pr_debug("qla2xxx HW vha->node_name: ");
5851         for (i = 0; i < WWN_SIZE; i++)
5852                 pr_debug("%02x ", vha->node_name[i]);
5853         pr_debug("\n");
5854         pr_debug("qla2xxx HW vha->port_name: ");
5855         for (i = 0; i < WWN_SIZE; i++)
5856                 pr_debug("%02x ", vha->port_name[i]);
5857         pr_debug("\n");
5858
5859         pr_debug("qla2xxx passed configfs WWPN: ");
5860         put_unaligned_be64(wwpn, b);
5861         for (i = 0; i < WWN_SIZE; i++)
5862                 pr_debug("%02x ", b[i]);
5863         pr_debug("\n");
5864 }
5865
5866 /**
5867  * qla_tgt_lport_register - register lport with external module
5868  *
5869  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5870  * @wwpn: Passwd FC target WWPN
5871  * @callback:  lport initialization callback for tcm_qla2xxx code
5872  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5873  */
5874 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5875                        u64 npiv_wwpn, u64 npiv_wwnn,
5876                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5877 {
5878         struct qla_tgt *tgt;
5879         struct scsi_qla_host *vha;
5880         struct qla_hw_data *ha;
5881         struct Scsi_Host *host;
5882         unsigned long flags;
5883         int rc;
5884         u8 b[WWN_SIZE];
5885
5886         mutex_lock(&qla_tgt_mutex);
5887         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5888                 vha = tgt->vha;
5889                 ha = vha->hw;
5890
5891                 host = vha->host;
5892                 if (!host)
5893                         continue;
5894
5895                 if (!(host->hostt->supported_mode & MODE_TARGET))
5896                         continue;
5897
5898                 spin_lock_irqsave(&ha->hardware_lock, flags);
5899                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5900                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5901                             host->host_no);
5902                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5903                         continue;
5904                 }
5905                 if (tgt->tgt_stop) {
5906                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5907                                  host->host_no);
5908                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5909                         continue;
5910                 }
5911                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5912
5913                 if (!scsi_host_get(host)) {
5914                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
5915                             "Unable to scsi_host_get() for"
5916                             " qla2xxx scsi_host\n");
5917                         continue;
5918                 }
5919                 qlt_lport_dump(vha, phys_wwpn, b);
5920
5921                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5922                         scsi_host_put(host);
5923                         continue;
5924                 }
5925                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5926                 if (rc != 0)
5927                         scsi_host_put(host);
5928
5929                 mutex_unlock(&qla_tgt_mutex);
5930                 return rc;
5931         }
5932         mutex_unlock(&qla_tgt_mutex);
5933
5934         return -ENODEV;
5935 }
5936 EXPORT_SYMBOL(qlt_lport_register);
5937
5938 /**
5939  * qla_tgt_lport_deregister - Degister lport
5940  *
5941  * @vha:  Registered scsi_qla_host pointer
5942  */
5943 void qlt_lport_deregister(struct scsi_qla_host *vha)
5944 {
5945         struct qla_hw_data *ha = vha->hw;
5946         struct Scsi_Host *sh = vha->host;
5947         /*
5948          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5949          */
5950         vha->vha_tgt.target_lport_ptr = NULL;
5951         ha->tgt.tgt_ops = NULL;
5952         /*
5953          * Release the Scsi_Host reference for the underlying qla2xxx host
5954          */
5955         scsi_host_put(sh);
5956 }
5957 EXPORT_SYMBOL(qlt_lport_deregister);
5958
5959 /* Must be called under HW lock */
5960 static void qlt_set_mode(struct scsi_qla_host *vha)
5961 {
5962         struct qla_hw_data *ha = vha->hw;
5963
5964         switch (ql2x_ini_mode) {
5965         case QLA2XXX_INI_MODE_DISABLED:
5966         case QLA2XXX_INI_MODE_EXCLUSIVE:
5967                 vha->host->active_mode = MODE_TARGET;
5968                 break;
5969         case QLA2XXX_INI_MODE_ENABLED:
5970                 vha->host->active_mode |= MODE_TARGET;
5971                 break;
5972         default:
5973                 break;
5974         }
5975
5976         if (ha->tgt.ini_mode_force_reverse)
5977                 qla_reverse_ini_mode(vha);
5978 }
5979
5980 /* Must be called under HW lock */
5981 static void qlt_clear_mode(struct scsi_qla_host *vha)
5982 {
5983         struct qla_hw_data *ha = vha->hw;
5984
5985         switch (ql2x_ini_mode) {
5986         case QLA2XXX_INI_MODE_DISABLED:
5987                 vha->host->active_mode = MODE_UNKNOWN;
5988                 break;
5989         case QLA2XXX_INI_MODE_EXCLUSIVE:
5990                 vha->host->active_mode = MODE_INITIATOR;
5991                 break;
5992         case QLA2XXX_INI_MODE_ENABLED:
5993                 vha->host->active_mode &= ~MODE_TARGET;
5994                 break;
5995         default:
5996                 break;
5997         }
5998
5999         if (ha->tgt.ini_mode_force_reverse)
6000                 qla_reverse_ini_mode(vha);
6001 }
6002
6003 /*
6004  * qla_tgt_enable_vha - NO LOCK HELD
6005  *
6006  * host_reset, bring up w/ Target Mode Enabled
6007  */
6008 void
6009 qlt_enable_vha(struct scsi_qla_host *vha)
6010 {
6011         struct qla_hw_data *ha = vha->hw;
6012         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6013         unsigned long flags;
6014         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
6015
6016         if (!tgt) {
6017                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
6018                     "Unable to locate qla_tgt pointer from"
6019                     " struct qla_hw_data\n");
6020                 dump_stack();
6021                 return;
6022         }
6023
6024         spin_lock_irqsave(&ha->hardware_lock, flags);
6025         tgt->tgt_stopped = 0;
6026         qlt_set_mode(vha);
6027         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6028
6029         if (vha->vp_idx) {
6030                 qla24xx_disable_vp(vha);
6031                 qla24xx_enable_vp(vha);
6032         } else {
6033                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
6034                 qla2xxx_wake_dpc(base_vha);
6035                 qla2x00_wait_for_hba_online(base_vha);
6036         }
6037 }
6038 EXPORT_SYMBOL(qlt_enable_vha);
6039
6040 /*
6041  * qla_tgt_disable_vha - NO LOCK HELD
6042  *
6043  * Disable Target Mode and reset the adapter
6044  */
6045 static void qlt_disable_vha(struct scsi_qla_host *vha)
6046 {
6047         struct qla_hw_data *ha = vha->hw;
6048         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
6049         unsigned long flags;
6050
6051         if (!tgt) {
6052                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
6053                     "Unable to locate qla_tgt pointer from"
6054                     " struct qla_hw_data\n");
6055                 dump_stack();
6056                 return;
6057         }
6058
6059         spin_lock_irqsave(&ha->hardware_lock, flags);
6060         qlt_clear_mode(vha);
6061         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6062
6063         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
6064         qla2xxx_wake_dpc(vha);
6065         qla2x00_wait_for_hba_online(vha);
6066 }
6067
6068 /*
6069  * Called from qla_init.c:qla24xx_vport_create() contex to setup
6070  * the target mode specific struct scsi_qla_host and struct qla_hw_data
6071  * members.
6072  */
6073 void
6074 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
6075 {
6076         if (!qla_tgt_mode_enabled(vha))
6077                 return;
6078
6079         vha->vha_tgt.qla_tgt = NULL;
6080
6081         mutex_init(&vha->vha_tgt.tgt_mutex);
6082         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
6083
6084         qlt_clear_mode(vha);
6085
6086         /*
6087          * NOTE: Currently the value is kept the same for <24xx and
6088          * >=24xx ISPs. If it is necessary to change it,
6089          * the check should be added for specific ISPs,
6090          * assigning the value appropriately.
6091          */
6092         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
6093
6094         qlt_add_target(ha, vha);
6095 }
6096
6097 void
6098 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
6099 {
6100         /*
6101          * FC-4 Feature bit 0 indicates target functionality to the name server.
6102          */
6103         if (qla_tgt_mode_enabled(vha)) {
6104                 if (qla_ini_mode_enabled(vha))
6105                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
6106                 else
6107                         ct_req->req.rff_id.fc4_feature = BIT_0;
6108         } else if (qla_ini_mode_enabled(vha)) {
6109                 ct_req->req.rff_id.fc4_feature = BIT_1;
6110         }
6111 }
6112
6113 /*
6114  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
6115  * @ha: HA context
6116  *
6117  * Beginning of ATIO ring has initialization control block already built
6118  * by nvram config routine.
6119  *
6120  * Returns 0 on success.
6121  */
6122 void
6123 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
6124 {
6125         struct qla_hw_data *ha = vha->hw;
6126         uint16_t cnt;
6127         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
6128
6129         if (!qla_tgt_mode_enabled(vha))
6130                 return;
6131
6132         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
6133                 pkt->u.raw.signature = ATIO_PROCESSED;
6134                 pkt++;
6135         }
6136
6137 }
6138
6139 /*
6140  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
6141  * @ha: SCSI driver HA context
6142  */
6143 void
6144 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
6145 {
6146         struct qla_hw_data *ha = vha->hw;
6147         struct atio_from_isp *pkt;
6148         int cnt, i;
6149
6150         if (!vha->flags.online)
6151                 return;
6152
6153         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
6154                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6155                 cnt = pkt->u.raw.entry_count;
6156
6157                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
6158
6159                 for (i = 0; i < cnt; i++) {
6160                         ha->tgt.atio_ring_index++;
6161                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
6162                                 ha->tgt.atio_ring_index = 0;
6163                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
6164                         } else
6165                                 ha->tgt.atio_ring_ptr++;
6166
6167                         pkt->u.raw.signature = ATIO_PROCESSED;
6168                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
6169                 }
6170                 wmb();
6171         }
6172
6173         /* Adjust ring index */
6174         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
6175         RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
6176 }
6177
6178 void
6179 qlt_24xx_config_rings(struct scsi_qla_host *vha)
6180 {
6181         struct qla_hw_data *ha = vha->hw;
6182         if (!QLA_TGT_MODE_ENABLED())
6183                 return;
6184
6185         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
6186         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
6187         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
6188
6189         if (IS_ATIO_MSIX_CAPABLE(ha)) {
6190                 struct qla_msix_entry *msix = &ha->msix_entries[2];
6191                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
6192
6193                 icb->msix_atio = cpu_to_le16(msix->entry);
6194                 ql_dbg(ql_dbg_init, vha, 0xf072,
6195                     "Registering ICB vector 0x%x for atio que.\n",
6196                     msix->entry);
6197         }
6198 }
6199
6200 void
6201 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
6202 {
6203         struct qla_hw_data *ha = vha->hw;
6204
6205         if (qla_tgt_mode_enabled(vha)) {
6206                 if (!ha->tgt.saved_set) {
6207                         /* We save only once */
6208                         ha->tgt.saved_exchange_count = nv->exchange_count;
6209                         ha->tgt.saved_firmware_options_1 =
6210                             nv->firmware_options_1;
6211                         ha->tgt.saved_firmware_options_2 =
6212                             nv->firmware_options_2;
6213                         ha->tgt.saved_firmware_options_3 =
6214                             nv->firmware_options_3;
6215                         ha->tgt.saved_set = 1;
6216                 }
6217
6218                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
6219
6220                 /* Enable target mode */
6221                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
6222
6223                 /* Disable ini mode, if requested */
6224                 if (!qla_ini_mode_enabled(vha))
6225                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
6226
6227                 /* Disable Full Login after LIP */
6228                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
6229                 /* Enable initial LIP */
6230                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
6231                 if (ql2xtgt_tape_enable)
6232                         /* Enable FC Tape support */
6233                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6234                 else
6235                         /* Disable FC Tape support */
6236                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6237
6238                 /* Disable Full Login after LIP */
6239                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
6240                 /* Enable target PRLI control */
6241                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
6242         } else {
6243                 if (ha->tgt.saved_set) {
6244                         nv->exchange_count = ha->tgt.saved_exchange_count;
6245                         nv->firmware_options_1 =
6246                             ha->tgt.saved_firmware_options_1;
6247                         nv->firmware_options_2 =
6248                             ha->tgt.saved_firmware_options_2;
6249                         nv->firmware_options_3 =
6250                             ha->tgt.saved_firmware_options_3;
6251                 }
6252                 return;
6253         }
6254
6255         /* out-of-order frames reassembly */
6256         nv->firmware_options_3 |= BIT_6|BIT_9;
6257
6258         if (ha->tgt.enable_class_2) {
6259                 if (vha->flags.init_done)
6260                         fc_host_supported_classes(vha->host) =
6261                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6262
6263                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
6264         } else {
6265                 if (vha->flags.init_done)
6266                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6267
6268                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
6269         }
6270 }
6271
6272 void
6273 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
6274         struct init_cb_24xx *icb)
6275 {
6276         struct qla_hw_data *ha = vha->hw;
6277
6278         if (ha->tgt.node_name_set) {
6279                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6280                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
6281         }
6282 }
6283
6284 void
6285 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
6286 {
6287         struct qla_hw_data *ha = vha->hw;
6288
6289         if (!QLA_TGT_MODE_ENABLED())
6290                 return;
6291
6292         if (qla_tgt_mode_enabled(vha)) {
6293                 if (!ha->tgt.saved_set) {
6294                         /* We save only once */
6295                         ha->tgt.saved_exchange_count = nv->exchange_count;
6296                         ha->tgt.saved_firmware_options_1 =
6297                             nv->firmware_options_1;
6298                         ha->tgt.saved_firmware_options_2 =
6299                             nv->firmware_options_2;
6300                         ha->tgt.saved_firmware_options_3 =
6301                             nv->firmware_options_3;
6302                         ha->tgt.saved_set = 1;
6303                 }
6304
6305                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
6306
6307                 /* Enable target mode */
6308                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
6309
6310                 /* Disable ini mode, if requested */
6311                 if (!qla_ini_mode_enabled(vha))
6312                         nv->firmware_options_1 |=
6313                             __constant_cpu_to_le32(BIT_5);
6314
6315                 /* Disable Full Login after LIP */
6316                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
6317                 /* Enable initial LIP */
6318                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
6319                 if (ql2xtgt_tape_enable)
6320                         /* Enable FC tape support */
6321                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
6322                 else
6323                         /* Disable FC tape support */
6324                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
6325
6326                 /* Disable Full Login after LIP */
6327                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
6328                 /* Enable target PRLI control */
6329                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
6330         } else {
6331                 if (ha->tgt.saved_set) {
6332                         nv->exchange_count = ha->tgt.saved_exchange_count;
6333                         nv->firmware_options_1 =
6334                             ha->tgt.saved_firmware_options_1;
6335                         nv->firmware_options_2 =
6336                             ha->tgt.saved_firmware_options_2;
6337                         nv->firmware_options_3 =
6338                             ha->tgt.saved_firmware_options_3;
6339                 }
6340                 return;
6341         }
6342
6343         /* out-of-order frames reassembly */
6344         nv->firmware_options_3 |= BIT_6|BIT_9;
6345
6346         if (ha->tgt.enable_class_2) {
6347                 if (vha->flags.init_done)
6348                         fc_host_supported_classes(vha->host) =
6349                                 FC_COS_CLASS2 | FC_COS_CLASS3;
6350
6351                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
6352         } else {
6353                 if (vha->flags.init_done)
6354                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
6355
6356                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
6357         }
6358 }
6359
6360 void
6361 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
6362         struct init_cb_81xx *icb)
6363 {
6364         struct qla_hw_data *ha = vha->hw;
6365
6366         if (!QLA_TGT_MODE_ENABLED())
6367                 return;
6368
6369         if (ha->tgt.node_name_set) {
6370                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
6371                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
6372         }
6373 }
6374
6375 void
6376 qlt_83xx_iospace_config(struct qla_hw_data *ha)
6377 {
6378         if (!QLA_TGT_MODE_ENABLED())
6379                 return;
6380
6381         ha->msix_count += 1; /* For ATIO Q */
6382 }
6383
6384 int
6385 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
6386         struct sts_entry_24xx *pkt)
6387 {
6388         switch (pkt->entry_type) {
6389         case ABTS_RECV_24XX:
6390         case ABTS_RESP_24XX:
6391         case CTIO_TYPE7:
6392         case NOTIFY_ACK_TYPE:
6393         case CTIO_CRC2:
6394                 return 1;
6395         default:
6396                 return 0;
6397         }
6398 }
6399
6400 void
6401 qlt_modify_vp_config(struct scsi_qla_host *vha,
6402         struct vp_config_entry_24xx *vpmod)
6403 {
6404         if (qla_tgt_mode_enabled(vha))
6405                 vpmod->options_idx1 &= ~BIT_5;
6406         /* Disable ini mode, if requested */
6407         if (!qla_ini_mode_enabled(vha))
6408                 vpmod->options_idx1 &= ~BIT_4;
6409 }
6410
6411 void
6412 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
6413 {
6414         if (!QLA_TGT_MODE_ENABLED())
6415                 return;
6416
6417         if  (ha->mqenable || IS_QLA83XX(ha) || IS_QLA27XX(ha)) {
6418                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
6419                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
6420         } else {
6421                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
6422                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
6423         }
6424
6425         mutex_init(&base_vha->vha_tgt.tgt_mutex);
6426         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
6427         qlt_clear_mode(base_vha);
6428 }
6429
6430 irqreturn_t
6431 qla83xx_msix_atio_q(int irq, void *dev_id)
6432 {
6433         struct rsp_que *rsp;
6434         scsi_qla_host_t *vha;
6435         struct qla_hw_data *ha;
6436         unsigned long flags;
6437
6438         rsp = (struct rsp_que *) dev_id;
6439         ha = rsp->hw;
6440         vha = pci_get_drvdata(ha->pdev);
6441
6442         spin_lock_irqsave(&ha->hardware_lock, flags);
6443
6444         qlt_24xx_process_atio_queue(vha);
6445         qla24xx_process_response_queue(vha, rsp);
6446
6447         spin_unlock_irqrestore(&ha->hardware_lock, flags);
6448
6449         return IRQ_HANDLED;
6450 }
6451
6452 int
6453 qlt_mem_alloc(struct qla_hw_data *ha)
6454 {
6455         if (!QLA_TGT_MODE_ENABLED())
6456                 return 0;
6457
6458         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
6459             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
6460         if (!ha->tgt.tgt_vp_map)
6461                 return -ENOMEM;
6462
6463         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
6464             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
6465             &ha->tgt.atio_dma, GFP_KERNEL);
6466         if (!ha->tgt.atio_ring) {
6467                 kfree(ha->tgt.tgt_vp_map);
6468                 return -ENOMEM;
6469         }
6470         return 0;
6471 }
6472
6473 void
6474 qlt_mem_free(struct qla_hw_data *ha)
6475 {
6476         if (!QLA_TGT_MODE_ENABLED())
6477                 return;
6478
6479         if (ha->tgt.atio_ring) {
6480                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
6481                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
6482                     ha->tgt.atio_dma);
6483         }
6484         kfree(ha->tgt.tgt_vp_map);
6485 }
6486
6487 /* vport_slock to be held by the caller */
6488 void
6489 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
6490 {
6491         if (!QLA_TGT_MODE_ENABLED())
6492                 return;
6493
6494         switch (cmd) {
6495         case SET_VP_IDX:
6496                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
6497                 break;
6498         case SET_AL_PA:
6499                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
6500                 break;
6501         case RESET_VP_IDX:
6502                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
6503                 break;
6504         case RESET_AL_PA:
6505                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
6506                 break;
6507         }
6508 }
6509
6510 static int __init qlt_parse_ini_mode(void)
6511 {
6512         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
6513                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
6514         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
6515                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
6516         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
6517                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
6518         else
6519                 return false;
6520
6521         return true;
6522 }
6523
6524 int __init qlt_init(void)
6525 {
6526         int ret;
6527
6528         if (!qlt_parse_ini_mode()) {
6529                 ql_log(ql_log_fatal, NULL, 0xe06b,
6530                     "qlt_parse_ini_mode() failed\n");
6531                 return -EINVAL;
6532         }
6533
6534         if (!QLA_TGT_MODE_ENABLED())
6535                 return 0;
6536
6537         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
6538             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
6539             qla_tgt_mgmt_cmd), 0, NULL);
6540         if (!qla_tgt_mgmt_cmd_cachep) {
6541                 ql_log(ql_log_fatal, NULL, 0xe06d,
6542                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
6543                 return -ENOMEM;
6544         }
6545
6546         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
6547             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
6548         if (!qla_tgt_mgmt_cmd_mempool) {
6549                 ql_log(ql_log_fatal, NULL, 0xe06e,
6550                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
6551                 ret = -ENOMEM;
6552                 goto out_mgmt_cmd_cachep;
6553         }
6554
6555         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
6556         if (!qla_tgt_wq) {
6557                 ql_log(ql_log_fatal, NULL, 0xe06f,
6558                     "alloc_workqueue for qla_tgt_wq failed\n");
6559                 ret = -ENOMEM;
6560                 goto out_cmd_mempool;
6561         }
6562         /*
6563          * Return 1 to signal that initiator-mode is being disabled
6564          */
6565         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
6566
6567 out_cmd_mempool:
6568         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6569 out_mgmt_cmd_cachep:
6570         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6571         return ret;
6572 }
6573
6574 void qlt_exit(void)
6575 {
6576         if (!QLA_TGT_MODE_ENABLED())
6577                 return;
6578
6579         destroy_workqueue(qla_tgt_wq);
6580         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
6581         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
6582 }