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 /*
 116  * Global Variables
 117  */
 118 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 119 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 120 static struct workqueue_struct *qla_tgt_wq;
 121 static DEFINE_MUTEX(qla_tgt_mutex);
 122 static LIST_HEAD(qla_tgt_glist);
 123
 124 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 125 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 126         struct qla_tgt *tgt,
 127         const uint8_t *port_name)
 128 {
 129         struct qla_tgt_sess *sess;
 130
 131         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 132                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 133                         return sess;
 134         }
 135
 136         return NULL;
 137 }
 138
 139 /* Might release hw lock, then reaquire!! */
 140 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 141 {
 142         /* Send marker if required */
 143         if (unlikely(vha->marker_needed != 0)) {
 144                 int rc = qla2x00_issue_marker(vha, vha_locked);
 145                 if (rc != QLA_SUCCESS) {
 146                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 147                             "qla_target(%d): issue_marker() failed\n",
 148                             vha->vp_idx);
 149                 }
 150                 return rc;
 151         }
 152         return QLA_SUCCESS;
 153 }
 154
 155 static inline
 156 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 157         uint8_t *d_id)
 158 {
 159         struct qla_hw_data *ha = vha->hw;
 160         uint8_t vp_idx;
 161
 162         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 163                 return NULL;
 164
 165         if (vha->d_id.b.al_pa == d_id[2])
 166                 return vha;
 167
 168         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 169         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 170         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 171                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 172
 173         return NULL;
 174 }
 175
 176 static inline
 177 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 178         uint16_t vp_idx)
 179 {
 180         struct qla_hw_data *ha = vha->hw;
 181
 182         if (vha->vp_idx == vp_idx)
 183                 return vha;
 184
 185         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 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 void qlt_incr_num_pend_cmds(struct scsi_qla_host *vha)
 193 {
 194         unsigned long flags;
 195
 196         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 197
 198         vha->hw->tgt.num_pend_cmds++;
 199         if (vha->hw->tgt.num_pend_cmds > vha->hw->qla_stats.stat_max_pend_cmds)
 200                 vha->hw->qla_stats.stat_max_pend_cmds =
 201                         vha->hw->tgt.num_pend_cmds;
 202         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 203 }
 204 static inline void qlt_decr_num_pend_cmds(struct scsi_qla_host *vha)
 205 {
 206         unsigned long flags;
 207
 208         spin_lock_irqsave(&vha->hw->tgt.q_full_lock, flags);
 209         vha->hw->tgt.num_pend_cmds--;
 210         spin_unlock_irqrestore(&vha->hw->tgt.q_full_lock, flags);
 211 }
 212
 213 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 214         struct atio_from_isp *atio)
 215 {
 216         ql_dbg(ql_dbg_tgt, vha, 0xe072,
 217                 "%s: qla_target(%d): type %x ox_id %04x\n",
 218                 __func__, vha->vp_idx, atio->u.raw.entry_type,
 219                 be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id));
 220
 221         switch (atio->u.raw.entry_type) {
 222         case ATIO_TYPE7:
 223         {
 224                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 225                     atio->u.isp24.fcp_hdr.d_id);
 226                 if (unlikely(NULL == host)) {
 227                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 228                             "qla_target(%d): Received ATIO_TYPE7 "
 229                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 230                             atio->u.isp24.fcp_hdr.d_id[0],
 231                             atio->u.isp24.fcp_hdr.d_id[1],
 232                             atio->u.isp24.fcp_hdr.d_id[2]);
 233                         break;
 234                 }
 235                 qlt_24xx_atio_pkt(host, atio);
 236                 break;
 237         }
 238
 239         case IMMED_NOTIFY_TYPE:
 240         {
 241                 struct scsi_qla_host *host = vha;
 242                 struct imm_ntfy_from_isp *entry =
 243                     (struct imm_ntfy_from_isp *)atio;
 244
 245                 if ((entry->u.isp24.vp_index != 0xFF) &&
 246                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 247                         host = qlt_find_host_by_vp_idx(vha,
 248                             entry->u.isp24.vp_index);
 249                         if (unlikely(!host)) {
 250                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 251                                     "qla_target(%d): Received "
 252                                     "ATIO (IMMED_NOTIFY_TYPE) "
 253                                     "with unknown vp_index %d\n",
 254                                     vha->vp_idx, entry->u.isp24.vp_index);
 255                                 break;
 256                         }
 257                 }
 258                 qlt_24xx_atio_pkt(host, atio);
 259                 break;
 260         }
 261
 262         default:
 263                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 264                     "qla_target(%d): Received unknown ATIO atio "
 265                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 266                 break;
 267         }
 268
 269         return;
 270 }
 271
 272 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 273 {
 274         switch (pkt->entry_type) {
 275         case CTIO_CRC2:
 276                 ql_dbg(ql_dbg_tgt, vha, 0xe073,
 277                         "qla_target(%d):%s: CRC2 Response pkt\n",
 278                         vha->vp_idx, __func__);
 279         case CTIO_TYPE7:
 280         {
 281                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 282                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 283                     entry->vp_index);
 284                 if (unlikely(!host)) {
 285                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 286                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 287                             "received, with unknown vp_index %d\n",
 288                             vha->vp_idx, entry->vp_index);
 289                         break;
 290                 }
 291                 qlt_response_pkt(host, pkt);
 292                 break;
 293         }
 294
 295         case IMMED_NOTIFY_TYPE:
 296         {
 297                 struct scsi_qla_host *host = vha;
 298                 struct imm_ntfy_from_isp *entry =
 299                     (struct imm_ntfy_from_isp *)pkt;
 300
 301                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 302                 if (unlikely(!host)) {
 303                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 304                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 305                             "received, with unknown vp_index %d\n",
 306                             vha->vp_idx, entry->u.isp24.vp_index);
 307                         break;
 308                 }
 309                 qlt_response_pkt(host, pkt);
 310                 break;
 311         }
 312
 313         case NOTIFY_ACK_TYPE:
 314         {
 315                 struct scsi_qla_host *host = vha;
 316                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 317
 318                 if (0xFF != entry->u.isp24.vp_index) {
 319                         host = qlt_find_host_by_vp_idx(vha,
 320                             entry->u.isp24.vp_index);
 321                         if (unlikely(!host)) {
 322                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 323                                     "qla_target(%d): Response "
 324                                     "pkt (NOTIFY_ACK_TYPE) "
 325                                     "received, with unknown "
 326                                     "vp_index %d\n", vha->vp_idx,
 327                                     entry->u.isp24.vp_index);
 328                                 break;
 329                         }
 330                 }
 331                 qlt_response_pkt(host, pkt);
 332                 break;
 333         }
 334
 335         case ABTS_RECV_24XX:
 336         {
 337                 struct abts_recv_from_24xx *entry =
 338                     (struct abts_recv_from_24xx *)pkt;
 339                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 340                     entry->vp_index);
 341                 if (unlikely(!host)) {
 342                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 343                             "qla_target(%d): Response pkt "
 344                             "(ABTS_RECV_24XX) received, with unknown "
 345                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 346                         break;
 347                 }
 348                 qlt_response_pkt(host, pkt);
 349                 break;
 350         }
 351
 352         case ABTS_RESP_24XX:
 353         {
 354                 struct abts_resp_to_24xx *entry =
 355                     (struct abts_resp_to_24xx *)pkt;
 356                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 357                     entry->vp_index);
 358                 if (unlikely(!host)) {
 359                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 360                             "qla_target(%d): Response pkt "
 361                             "(ABTS_RECV_24XX) received, with unknown "
 362                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 363                         break;
 364                 }
 365                 qlt_response_pkt(host, pkt);
 366                 break;
 367         }
 368
 369         default:
 370                 qlt_response_pkt(vha, pkt);
 371                 break;
 372         }
 373
 374 }
 375
 376 static void qlt_free_session_done(struct work_struct *work)
 377 {
 378         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 379             free_work);
 380         struct qla_tgt *tgt = sess->tgt;
 381         struct scsi_qla_host *vha = sess->vha;
 382         struct qla_hw_data *ha = vha->hw;
 383
 384         BUG_ON(!tgt);
 385         /*
 386          * Release the target session for FC Nexus from fabric module code.
 387          */
 388         if (sess->se_sess != NULL)
 389                 ha->tgt.tgt_ops->free_session(sess);
 390
 391         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 392             "Unregistration of sess %p finished\n", sess);
 393
 394         kfree(sess);
 395         /*
 396          * We need to protect against race, when tgt is freed before or
 397          * inside wake_up()
 398          */
 399         tgt->sess_count--;
 400         if (tgt->sess_count == 0)
 401                 wake_up_all(&tgt->waitQ);
 402 }
 403
 404 /* ha->hardware_lock supposed to be held on entry */
 405 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 406 {
 407         struct scsi_qla_host *vha = sess->vha;
 408
 409         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 410
 411         list_del(&sess->sess_list_entry);
 412         if (sess->deleted)
 413                 list_del(&sess->del_list_entry);
 414
 415         INIT_WORK(&sess->free_work, qlt_free_session_done);
 416         schedule_work(&sess->free_work);
 417 }
 418 EXPORT_SYMBOL(qlt_unreg_sess);
 419
 420 /* ha->hardware_lock supposed to be held on entry */
 421 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 422 {
 423         struct qla_hw_data *ha = vha->hw;
 424         struct qla_tgt_sess *sess = NULL;
 425         uint32_t unpacked_lun, lun = 0;
 426         uint16_t loop_id;
 427         int res = 0;
 428         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 429         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 430
 431         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 432         if (loop_id == 0xFFFF) {
 433 #if 0 /* FIXME: Re-enable Global event handling.. */
 434                 /* Global event */
 435                 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
 436                 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
 437                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 438                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 439                             typeof(*sess), sess_list_entry);
 440                         switch (mcmd) {
 441                         case QLA_TGT_NEXUS_LOSS_SESS:
 442                                 mcmd = QLA_TGT_NEXUS_LOSS;
 443                                 break;
 444                         case QLA_TGT_ABORT_ALL_SESS:
 445                                 mcmd = QLA_TGT_ABORT_ALL;
 446                                 break;
 447                         case QLA_TGT_NEXUS_LOSS:
 448                         case QLA_TGT_ABORT_ALL:
 449                                 break;
 450                         default:
 451                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 452                                     "qla_target(%d): Not allowed "
 453                                     "command %x in %s", vha->vp_idx,
 454                                     mcmd, __func__);
 455                                 sess = NULL;
 456                                 break;
 457                         }
 458                 } else
 459                         sess = NULL;
 460 #endif
 461         } else {
 462                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 463         }
 464
 465         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 466             "Using sess for qla_tgt_reset: %p\n", sess);
 467         if (!sess) {
 468                 res = -ESRCH;
 469                 return res;
 470         }
 471
 472         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 473             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 474             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 475             mcmd, loop_id);
 476
 477         lun = a->u.isp24.fcp_cmnd.lun;
 478         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 479
 480         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 481             iocb, QLA24XX_MGMT_SEND_NACK);
 482 }
 483
 484 /* ha->hardware_lock supposed to be held on entry */
 485 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 486         bool immediate)
 487 {
 488         struct qla_tgt *tgt = sess->tgt;
 489         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 490
 491         if (sess->deleted)
 492                 return;
 493
 494         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 495             "Scheduling sess %p for deletion\n", sess);
 496         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 497         sess->deleted = 1;
 498
 499         if (immediate)
 500                 dev_loss_tmo = 0;
 501
 502         sess->expires = jiffies + dev_loss_tmo * HZ;
 503
 504         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 505             "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
 506             "deletion in %u secs (expires: %lu) immed: %d\n",
 507             sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
 508             sess->expires, immediate);
 509
 510         if (immediate)
 511                 schedule_delayed_work(&tgt->sess_del_work, 0);
 512         else
 513                 schedule_delayed_work(&tgt->sess_del_work,
 514                     sess->expires - jiffies);
 515 }
 516
 517 /* ha->hardware_lock supposed to be held on entry */
 518 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
 519 {
 520         struct qla_tgt_sess *sess;
 521
 522         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 523                 qlt_schedule_sess_for_deletion(sess, true);
 524
 525         /* At this point tgt could be already dead */
 526 }
 527
 528 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 529         uint16_t *loop_id)
 530 {
 531         struct qla_hw_data *ha = vha->hw;
 532         dma_addr_t gid_list_dma;
 533         struct gid_list_info *gid_list;
 534         char *id_iter;
 535         int res, rc, i;
 536         uint16_t entries;
 537
 538         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 539             &gid_list_dma, GFP_KERNEL);
 540         if (!gid_list) {
 541                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 542                     "qla_target(%d): DMA Alloc failed of %u\n",
 543                     vha->vp_idx, qla2x00_gid_list_size(ha));
 544                 return -ENOMEM;
 545         }
 546
 547         /* Get list of logged in devices */
 548         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 549         if (rc != QLA_SUCCESS) {
 550                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 551                     "qla_target(%d): get_id_list() failed: %x\n",
 552                     vha->vp_idx, rc);
 553                 res = -1;
 554                 goto out_free_id_list;
 555         }
 556
 557         id_iter = (char *)gid_list;
 558         res = -1;
 559         for (i = 0; i < entries; i++) {
 560                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 561                 if ((gid->al_pa == s_id[2]) &&
 562                     (gid->area == s_id[1]) &&
 563                     (gid->domain == s_id[0])) {
 564                         *loop_id = le16_to_cpu(gid->loop_id);
 565                         res = 0;
 566                         break;
 567                 }
 568                 id_iter += ha->gid_list_info_size;
 569         }
 570
 571 out_free_id_list:
 572         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 573             gid_list, gid_list_dma);
 574         return res;
 575 }
 576
 577 /* ha->hardware_lock supposed to be held on entry */
 578 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 579 {
 580         BUG_ON(!sess->deleted);
 581
 582         list_del(&sess->del_list_entry);
 583         sess->deleted = 0;
 584 }
 585
 586 static void qlt_del_sess_work_fn(struct delayed_work *work)
 587 {
 588         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 589             sess_del_work);
 590         struct scsi_qla_host *vha = tgt->vha;
 591         struct qla_hw_data *ha = vha->hw;
 592         struct qla_tgt_sess *sess;
 593         unsigned long flags, elapsed;
 594
 595         spin_lock_irqsave(&ha->hardware_lock, flags);
 596         while (!list_empty(&tgt->del_sess_list)) {
 597                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 598                     del_list_entry);
 599                 elapsed = jiffies;
 600                 if (time_after_eq(elapsed, sess->expires)) {
 601                         qlt_undelete_sess(sess);
 602
 603                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 604                             "Timeout: sess %p about to be deleted\n",
 605                             sess);
 606                         ha->tgt.tgt_ops->shutdown_sess(sess);
 607                         ha->tgt.tgt_ops->put_sess(sess);
 608                 } else {
 609                         schedule_delayed_work(&tgt->sess_del_work,
 610                             sess->expires - elapsed);
 611                         break;
 612                 }
 613         }
 614         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 615 }
 616
 617 /*
 618  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 619  * Caller must put it.
 620  */
 621 static struct qla_tgt_sess *qlt_create_sess(
 622         struct scsi_qla_host *vha,
 623         fc_port_t *fcport,
 624         bool local)
 625 {
 626         struct qla_hw_data *ha = vha->hw;
 627         struct qla_tgt_sess *sess;
 628         unsigned long flags;
 629         unsigned char be_sid[3];
 630
 631         /* Check to avoid double sessions */
 632         spin_lock_irqsave(&ha->hardware_lock, flags);
 633         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 634                                 sess_list_entry) {
 635                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 636                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 637                             "Double sess %p found (s_id %x:%x:%x, "
 638                             "loop_id %d), updating to d_id %x:%x:%x, "
 639                             "loop_id %d", sess, sess->s_id.b.domain,
 640                             sess->s_id.b.al_pa, sess->s_id.b.area,
 641                             sess->loop_id, fcport->d_id.b.domain,
 642                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 643                             fcport->loop_id);
 644
 645                         if (sess->deleted)
 646                                 qlt_undelete_sess(sess);
 647
 648                         kref_get(&sess->se_sess->sess_kref);
 649                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 650                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 651
 652                         if (sess->local && !local)
 653                                 sess->local = 0;
 654                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 655
 656                         return sess;
 657                 }
 658         }
 659         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 660
 661         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 662         if (!sess) {
 663                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 664                     "qla_target(%u): session allocation failed, all commands "
 665                     "from port %8phC will be refused", vha->vp_idx,
 666                     fcport->port_name);
 667
 668                 return NULL;
 669         }
 670         sess->tgt = vha->vha_tgt.qla_tgt;
 671         sess->vha = vha;
 672         sess->s_id = fcport->d_id;
 673         sess->loop_id = fcport->loop_id;
 674         sess->local = local;
 675
 676         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 677             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 678             sess, vha->vha_tgt.qla_tgt);
 679
 680         be_sid[0] = sess->s_id.b.domain;
 681         be_sid[1] = sess->s_id.b.area;
 682         be_sid[2] = sess->s_id.b.al_pa;
 683         /*
 684          * Determine if this fc_port->port_name is allowed to access
 685          * target mode using explict NodeACLs+MappedLUNs, or using
 686          * TPG demo mode.  If this is successful a target mode FC nexus
 687          * is created.
 688          */
 689         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 690             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 691                 kfree(sess);
 692                 return NULL;
 693         }
 694         /*
 695          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 696          * access across ->hardware_lock reaquire.
 697          */
 698         kref_get(&sess->se_sess->sess_kref);
 699
 700         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 701         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 702         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 703
 704         spin_lock_irqsave(&ha->hardware_lock, flags);
 705         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 706         vha->vha_tgt.qla_tgt->sess_count++;
 707         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 708
 709         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 710             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 711             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 712             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 713             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 714             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 715
 716         return sess;
 717 }
 718
 719 /*
 720  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 721  */
 722 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 723 {
 724         struct qla_hw_data *ha = vha->hw;
 725         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 726         struct qla_tgt_sess *sess;
 727         unsigned long flags;
 728
 729         if (!vha->hw->tgt.tgt_ops)
 730                 return;
 731
 732         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 733                 return;
 734
 735         if (qla_ini_mode_enabled(vha))
 736                 return;
 737
 738         spin_lock_irqsave(&ha->hardware_lock, flags);
 739         if (tgt->tgt_stop) {
 740                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 741                 return;
 742         }
 743         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 744         if (!sess) {
 745                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 746
 747                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 748                 sess = qlt_create_sess(vha, fcport, false);
 749                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 750
 751                 spin_lock_irqsave(&ha->hardware_lock, flags);
 752         } else {
 753                 kref_get(&sess->se_sess->sess_kref);
 754
 755                 if (sess->deleted) {
 756                         qlt_undelete_sess(sess);
 757
 758                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 759                             "qla_target(%u): %ssession for port %8phC "
 760                             "(loop ID %d) reappeared\n", vha->vp_idx,
 761                             sess->local ? "local " : "", sess->port_name,
 762                             sess->loop_id);
 763
 764                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 765                             "Reappeared sess %p\n", sess);
 766                 }
 767                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 768                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 769         }
 770
 771         if (sess && sess->local) {
 772                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 773                     "qla_target(%u): local session for "
 774                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 775                     fcport->port_name, sess->loop_id);
 776                 sess->local = 0;
 777         }
 778         ha->tgt.tgt_ops->put_sess(sess);
 779         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 780 }
 781
 782 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 783 {
 784         struct qla_hw_data *ha = vha->hw;
 785         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 786         struct qla_tgt_sess *sess;
 787         unsigned long flags;
 788
 789         if (!vha->hw->tgt.tgt_ops)
 790                 return;
 791
 792         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 793                 return;
 794
 795         spin_lock_irqsave(&ha->hardware_lock, flags);
 796         if (tgt->tgt_stop) {
 797                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 798                 return;
 799         }
 800         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 801         if (!sess) {
 802                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 803                 return;
 804         }
 805
 806         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 807
 808         sess->local = 1;
 809         qlt_schedule_sess_for_deletion(sess, false);
 810         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 811 }
 812
 813 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 814 {
 815         struct qla_hw_data *ha = tgt->ha;
 816         unsigned long flags;
 817         int res;
 818         /*
 819          * We need to protect against race, when tgt is freed before or
 820          * inside wake_up()
 821          */
 822         spin_lock_irqsave(&ha->hardware_lock, flags);
 823         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 824             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 825             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 826         res = (tgt->sess_count == 0);
 827         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 828
 829         return res;
 830 }
 831
 832 /* Called by tcm_qla2xxx configfs code */
 833 int qlt_stop_phase1(struct qla_tgt *tgt)
 834 {
 835         struct scsi_qla_host *vha = tgt->vha;
 836         struct qla_hw_data *ha = tgt->ha;
 837         unsigned long flags;
 838
 839         mutex_lock(&qla_tgt_mutex);
 840         if (!vha->fc_vport) {
 841                 struct Scsi_Host *sh = vha->host;
 842                 struct fc_host_attrs *fc_host = shost_to_fc_host(sh);
 843                 bool npiv_vports;
 844
 845                 spin_lock_irqsave(sh->host_lock, flags);
 846                 npiv_vports = (fc_host->npiv_vports_inuse);
 847                 spin_unlock_irqrestore(sh->host_lock, flags);
 848
 849                 if (npiv_vports) {
 850                         mutex_unlock(&qla_tgt_mutex);
 851                         return -EPERM;
 852                 }
 853         }
 854         if (tgt->tgt_stop || tgt->tgt_stopped) {
 855                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 856                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 857                 mutex_unlock(&qla_tgt_mutex);
 858                 return -EPERM;
 859         }
 860
 861         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 862             vha->host_no, vha);
 863         /*
 864          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 865          * Lock is needed, because we still can get an incoming packet.
 866          */
 867         mutex_lock(&vha->vha_tgt.tgt_mutex);
 868         spin_lock_irqsave(&ha->hardware_lock, flags);
 869         tgt->tgt_stop = 1;
 870         qlt_clear_tgt_db(tgt, true);
 871         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 872         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 873         mutex_unlock(&qla_tgt_mutex);
 874
 875         flush_delayed_work(&tgt->sess_del_work);
 876
 877         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 878             "Waiting for sess works (tgt %p)", tgt);
 879         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 880         while (!list_empty(&tgt->sess_works_list)) {
 881                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 882                 flush_scheduled_work();
 883                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 884         }
 885         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 886
 887         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 888             "Waiting for tgt %p: list_empty(sess_list)=%d "
 889             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 890             tgt->sess_count);
 891
 892         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 893
 894         /* Big hammer */
 895         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 896                 qlt_disable_vha(vha);
 897
 898         /* Wait for sessions to clear out (just in case) */
 899         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 900         return 0;
 901 }
 902 EXPORT_SYMBOL(qlt_stop_phase1);
 903
 904 /* Called by tcm_qla2xxx configfs code */
 905 void qlt_stop_phase2(struct qla_tgt *tgt)
 906 {
 907         struct qla_hw_data *ha = tgt->ha;
 908         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
 909         unsigned long flags;
 910
 911         if (tgt->tgt_stopped) {
 912                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
 913                     "Already in tgt->tgt_stopped state\n");
 914                 dump_stack();
 915                 return;
 916         }
 917
 918         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
 919             "Waiting for %d IRQ commands to complete (tgt %p)",
 920             tgt->irq_cmd_count, tgt);
 921
 922         mutex_lock(&vha->vha_tgt.tgt_mutex);
 923         spin_lock_irqsave(&ha->hardware_lock, flags);
 924         while (tgt->irq_cmd_count != 0) {
 925                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 926                 udelay(2);
 927                 spin_lock_irqsave(&ha->hardware_lock, flags);
 928         }
 929         tgt->tgt_stop = 0;
 930         tgt->tgt_stopped = 1;
 931         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 932         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 933
 934         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
 935             tgt);
 936 }
 937 EXPORT_SYMBOL(qlt_stop_phase2);
 938
 939 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
 940 static void qlt_release(struct qla_tgt *tgt)
 941 {
 942         scsi_qla_host_t *vha = tgt->vha;
 943
 944         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
 945                 qlt_stop_phase2(tgt);
 946
 947         vha->vha_tgt.qla_tgt = NULL;
 948
 949         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
 950             "Release of tgt %p finished\n", tgt);
 951
 952         kfree(tgt);
 953 }
 954
 955 /* ha->hardware_lock supposed to be held on entry */
 956 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
 957         const void *param, unsigned int param_size)
 958 {
 959         struct qla_tgt_sess_work_param *prm;
 960         unsigned long flags;
 961
 962         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
 963         if (!prm) {
 964                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
 965                     "qla_target(%d): Unable to create session "
 966                     "work, command will be refused", 0);
 967                 return -ENOMEM;
 968         }
 969
 970         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
 971             "Scheduling work (type %d, prm %p)"
 972             " to find session for param %p (size %d, tgt %p)\n",
 973             type, prm, param, param_size, tgt);
 974
 975         prm->type = type;
 976         memcpy(&prm->tm_iocb, param, param_size);
 977
 978         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 979         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
 980         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 981
 982         schedule_work(&tgt->sess_work);
 983
 984         return 0;
 985 }
 986
 987 /*
 988  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 989  */
 990 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 991         struct imm_ntfy_from_isp *ntfy,
 992         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 993         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
 994 {
 995         struct qla_hw_data *ha = vha->hw;
 996         request_t *pkt;
 997         struct nack_to_isp *nack;
 998
 999         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1000
1001         /* Send marker if required */
1002         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1003                 return;
1004
1005         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1006         if (!pkt) {
1007                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1008                     "qla_target(%d): %s failed: unable to allocate "
1009                     "request packet\n", vha->vp_idx, __func__);
1010                 return;
1011         }
1012
1013         if (vha->vha_tgt.qla_tgt != NULL)
1014                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
1015
1016         pkt->entry_type = NOTIFY_ACK_TYPE;
1017         pkt->entry_count = 1;
1018
1019         nack = (struct nack_to_isp *)pkt;
1020         nack->ox_id = ntfy->ox_id;
1021
1022         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1023         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1024                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1025                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1026         }
1027         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1028         nack->u.isp24.status = ntfy->u.isp24.status;
1029         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1030         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
1031         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1032         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1033         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1034         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1035         nack->u.isp24.srr_reject_code = srr_reject_code;
1036         nack->u.isp24.srr_reject_code_expl = srr_explan;
1037         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1038
1039         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1040             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1041             vha->vp_idx, nack->u.isp24.status);
1042
1043         /* Memory Barrier */
1044         wmb();
1045         qla2x00_start_iocbs(vha, vha->req);
1046 }
1047
1048 /*
1049  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1050  */
1051 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1052         struct abts_recv_from_24xx *abts, uint32_t status,
1053         bool ids_reversed)
1054 {
1055         struct qla_hw_data *ha = vha->hw;
1056         struct abts_resp_to_24xx *resp;
1057         uint32_t f_ctl;
1058         uint8_t *p;
1059
1060         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1061             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1062             ha, abts, status);
1063
1064         /* Send marker if required */
1065         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1066                 return;
1067
1068         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1069         if (!resp) {
1070                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1071                     "qla_target(%d): %s failed: unable to allocate "
1072                     "request packet", vha->vp_idx, __func__);
1073                 return;
1074         }
1075
1076         resp->entry_type = ABTS_RESP_24XX;
1077         resp->entry_count = 1;
1078         resp->nport_handle = abts->nport_handle;
1079         resp->vp_index = vha->vp_idx;
1080         resp->sof_type = abts->sof_type;
1081         resp->exchange_address = abts->exchange_address;
1082         resp->fcp_hdr_le = abts->fcp_hdr_le;
1083         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1084             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1085             F_CTL_SEQ_INITIATIVE);
1086         p = (uint8_t *)&f_ctl;
1087         resp->fcp_hdr_le.f_ctl[0] = *p++;
1088         resp->fcp_hdr_le.f_ctl[1] = *p++;
1089         resp->fcp_hdr_le.f_ctl[2] = *p;
1090         if (ids_reversed) {
1091                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1092                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1093                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1094                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1095                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1096                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1097         } else {
1098                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1099                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1100                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1101                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1102                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1103                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1104         }
1105         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1106         if (status == FCP_TMF_CMPL) {
1107                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1108                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1109                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1110                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1111                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1112                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1113         } else {
1114                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1115                 resp->payload.ba_rjt.reason_code =
1116                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1117                 /* Other bytes are zero */
1118         }
1119
1120         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1121
1122         /* Memory Barrier */
1123         wmb();
1124         qla2x00_start_iocbs(vha, vha->req);
1125 }
1126
1127 /*
1128  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1129  */
1130 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1131         struct abts_resp_from_24xx_fw *entry)
1132 {
1133         struct ctio7_to_24xx *ctio;
1134
1135         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1136             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1137         /* Send marker if required */
1138         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1139                 return;
1140
1141         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs_ready(vha, NULL);
1142         if (ctio == NULL) {
1143                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1144                     "qla_target(%d): %s failed: unable to allocate "
1145                     "request packet\n", vha->vp_idx, __func__);
1146                 return;
1147         }
1148
1149         /*
1150          * We've got on entrance firmware's response on by us generated
1151          * ABTS response. So, in it ID fields are reversed.
1152          */
1153
1154         ctio->entry_type = CTIO_TYPE7;
1155         ctio->entry_count = 1;
1156         ctio->nport_handle = entry->nport_handle;
1157         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1158         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1159         ctio->vp_index = vha->vp_idx;
1160         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1161         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1162         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1163         ctio->exchange_addr = entry->exchange_addr_to_abort;
1164         ctio->u.status1.flags =
1165             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1166                 CTIO7_FLAGS_TERMINATE);
1167         ctio->u.status1.ox_id = cpu_to_le16(entry->fcp_hdr_le.ox_id);
1168
1169         /* Memory Barrier */
1170         wmb();
1171         qla2x00_start_iocbs(vha, vha->req);
1172
1173         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1174             FCP_TMF_CMPL, true);
1175 }
1176
1177 /* ha->hardware_lock supposed to be held on entry */
1178 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1179         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1180 {
1181         struct qla_hw_data *ha = vha->hw;
1182         struct se_session *se_sess = sess->se_sess;
1183         struct qla_tgt_mgmt_cmd *mcmd;
1184         struct se_cmd *se_cmd;
1185         u32 lun = 0;
1186         int rc;
1187         bool found_lun = false;
1188
1189         spin_lock(&se_sess->sess_cmd_lock);
1190         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1191                 struct qla_tgt_cmd *cmd =
1192                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1193                 if (cmd->tag == abts->exchange_addr_to_abort) {
1194                         lun = cmd->unpacked_lun;
1195                         found_lun = true;
1196                         break;
1197                 }
1198         }
1199         spin_unlock(&se_sess->sess_cmd_lock);
1200
1201         if (!found_lun)
1202                 return -ENOENT;
1203
1204         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1205             "qla_target(%d): task abort (tag=%d)\n",
1206             vha->vp_idx, abts->exchange_addr_to_abort);
1207
1208         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1209         if (mcmd == NULL) {
1210                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1211                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1212                     vha->vp_idx, __func__);
1213                 return -ENOMEM;
1214         }
1215         memset(mcmd, 0, sizeof(*mcmd));
1216
1217         mcmd->sess = sess;
1218         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1219         mcmd->reset_count = vha->hw->chip_reset;
1220
1221         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1222             abts->exchange_addr_to_abort);
1223         if (rc != 0) {
1224                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1225                     "qla_target(%d):  tgt_ops->handle_tmr()"
1226                     " failed: %d", vha->vp_idx, rc);
1227                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1228                 return -EFAULT;
1229         }
1230
1231         return 0;
1232 }
1233
1234 /*
1235  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1236  */
1237 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1238         struct abts_recv_from_24xx *abts)
1239 {
1240         struct qla_hw_data *ha = vha->hw;
1241         struct qla_tgt_sess *sess;
1242         uint32_t tag = abts->exchange_addr_to_abort;
1243         uint8_t s_id[3];
1244         int rc;
1245
1246         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1247                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1248                     "qla_target(%d): ABTS: Abort Sequence not "
1249                     "supported\n", vha->vp_idx);
1250                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1251                 return;
1252         }
1253
1254         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1255                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1256                     "qla_target(%d): ABTS: Unknown Exchange "
1257                     "Address received\n", vha->vp_idx);
1258                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1259                 return;
1260         }
1261
1262         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1263             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1264             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1265             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1266             le32_to_cpu(abts->fcp_hdr_le.parameter));
1267
1268         s_id[0] = abts->fcp_hdr_le.s_id[2];
1269         s_id[1] = abts->fcp_hdr_le.s_id[1];
1270         s_id[2] = abts->fcp_hdr_le.s_id[0];
1271
1272         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1273         if (!sess) {
1274                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1275                     "qla_target(%d): task abort for non-existant session\n",
1276                     vha->vp_idx);
1277                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1278                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1279                 if (rc != 0) {
1280                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1281                             false);
1282                 }
1283                 return;
1284         }
1285
1286         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1287         if (rc != 0) {
1288                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1289                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1290                     vha->vp_idx, rc);
1291                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1292                 return;
1293         }
1294 }
1295
1296 /*
1297  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1298  */
1299 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1300         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1301 {
1302         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1303         struct ctio7_to_24xx *ctio;
1304         uint16_t temp;
1305
1306         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1307             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1308             ha, atio, resp_code);
1309
1310         /* Send marker if required */
1311         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1312                 return;
1313
1314         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1315         if (ctio == NULL) {
1316                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1317                     "qla_target(%d): %s failed: unable to allocate "
1318                     "request packet\n", ha->vp_idx, __func__);
1319                 return;
1320         }
1321
1322         ctio->entry_type = CTIO_TYPE7;
1323         ctio->entry_count = 1;
1324         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1325         ctio->nport_handle = mcmd->sess->loop_id;
1326         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1327         ctio->vp_index = ha->vp_idx;
1328         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1329         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1330         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1331         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1332         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1333             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1334                 CTIO7_FLAGS_SEND_STATUS);
1335         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1336         ctio->u.status1.ox_id = cpu_to_le16(temp);
1337         ctio->u.status1.scsi_status =
1338             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1339         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1340         ctio->u.status1.sense_data[0] = resp_code;
1341
1342         /* Memory Barrier */
1343         wmb();
1344         qla2x00_start_iocbs(ha, ha->req);
1345 }
1346
1347 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1348 {
1349         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1350 }
1351 EXPORT_SYMBOL(qlt_free_mcmd);
1352
1353 /* callback from target fabric module code */
1354 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1355 {
1356         struct scsi_qla_host *vha = mcmd->sess->vha;
1357         struct qla_hw_data *ha = vha->hw;
1358         unsigned long flags;
1359
1360         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1361             "TM response mcmd (%p) status %#x state %#x",
1362             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1363
1364         spin_lock_irqsave(&ha->hardware_lock, flags);
1365
1366         if (qla2x00_reset_active(vha) || mcmd->reset_count != ha->chip_reset) {
1367                 /*
1368                  * Either a chip reset is active or this request was from
1369                  * previous life, just abort the processing.
1370                  */
1371                 ql_dbg(ql_dbg_async, vha, 0xe100,
1372                         "RESET-TMR active/old-count/new-count = %d/%d/%d.\n",
1373                         qla2x00_reset_active(vha), mcmd->reset_count,
1374                         ha->chip_reset);
1375                 ha->tgt.tgt_ops->free_mcmd(mcmd);
1376                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1377                 return;
1378         }
1379
1380         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1381                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1382                     0, 0, 0, 0, 0, 0);
1383         else {
1384                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1385                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1386                             mcmd->fc_tm_rsp, false);
1387                 else
1388                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1389                             mcmd->fc_tm_rsp);
1390         }
1391         /*
1392          * Make the callback for ->free_mcmd() to queue_work() and invoke
1393          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1394          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1395          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1396          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1397          * qlt_xmit_tm_rsp() returns here..
1398          */
1399         ha->tgt.tgt_ops->free_mcmd(mcmd);
1400         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1401 }
1402 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1403
1404 /* No locks */
1405 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1406 {
1407         struct qla_tgt_cmd *cmd = prm->cmd;
1408
1409         BUG_ON(cmd->sg_cnt == 0);
1410
1411         prm->sg = (struct scatterlist *)cmd->sg;
1412         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1413             cmd->sg_cnt, cmd->dma_data_direction);
1414         if (unlikely(prm->seg_cnt == 0))
1415                 goto out_err;
1416
1417         prm->cmd->sg_mapped = 1;
1418
1419         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL) {
1420                 /*
1421                  * If greater than four sg entries then we need to allocate
1422                  * the continuation entries
1423                  */
1424                 if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1425                         prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1426                         prm->tgt->datasegs_per_cmd,
1427                         prm->tgt->datasegs_per_cont);
1428         } else {
1429                 /* DIF */
1430                 if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1431                     (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1432                         prm->seg_cnt = DIV_ROUND_UP(cmd->bufflen, cmd->blk_sz);
1433                         prm->tot_dsds = prm->seg_cnt;
1434                 } else
1435                         prm->tot_dsds = prm->seg_cnt;
1436
1437                 if (cmd->prot_sg_cnt) {
1438                         prm->prot_sg      = cmd->prot_sg;
1439                         prm->prot_seg_cnt = pci_map_sg(prm->tgt->ha->pdev,
1440                                 cmd->prot_sg, cmd->prot_sg_cnt,
1441                                 cmd->dma_data_direction);
1442                         if (unlikely(prm->prot_seg_cnt == 0))
1443                                 goto out_err;
1444
1445                         if ((cmd->se_cmd.prot_op == TARGET_PROT_DIN_INSERT) ||
1446                             (cmd->se_cmd.prot_op == TARGET_PROT_DOUT_STRIP)) {
1447                                 /* Dif Bundling not support here */
1448                                 prm->prot_seg_cnt = DIV_ROUND_UP(cmd->bufflen,
1449                                                                 cmd->blk_sz);
1450                                 prm->tot_dsds += prm->prot_seg_cnt;
1451                         } else
1452                                 prm->tot_dsds += prm->prot_seg_cnt;
1453                 }
1454         }
1455
1456         return 0;
1457
1458 out_err:
1459         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1460             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1461             0, prm->cmd->sg_cnt);
1462         return -1;
1463 }
1464
1465 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1466         struct qla_tgt_cmd *cmd)
1467 {
1468         struct qla_hw_data *ha = vha->hw;
1469
1470         BUG_ON(!cmd->sg_mapped);
1471         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1472         cmd->sg_mapped = 0;
1473
1474         if (cmd->prot_sg_cnt)
1475                 pci_unmap_sg(ha->pdev, cmd->prot_sg, cmd->prot_sg_cnt,
1476                         cmd->dma_data_direction);
1477
1478         if (cmd->ctx_dsd_alloced)
1479                 qla2x00_clean_dsd_pool(ha, NULL, cmd);
1480
1481         if (cmd->ctx)
1482                 dma_pool_free(ha->dl_dma_pool, cmd->ctx, cmd->ctx->crc_ctx_dma);
1483 }
1484
1485 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1486         uint32_t req_cnt)
1487 {
1488         uint32_t cnt, cnt_in;
1489
1490         if (vha->req->cnt < (req_cnt + 2)) {
1491                 cnt = (uint16_t)RD_REG_DWORD(vha->req->req_q_out);
1492                 cnt_in = (uint16_t)RD_REG_DWORD(vha->req->req_q_in);
1493
1494                 if  (vha->req->ring_index < cnt)
1495                         vha->req->cnt = cnt - vha->req->ring_index;
1496                 else
1497                         vha->req->cnt = vha->req->length -
1498                             (vha->req->ring_index - cnt);
1499         }
1500
1501         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1502                 ql_dbg(ql_dbg_io, vha, 0x305a,
1503                     "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",
1504                     vha->vp_idx, vha->req->ring_index,
1505                     vha->req->cnt, req_cnt, cnt, cnt_in, vha->req->length);
1506                 return -EAGAIN;
1507         }
1508         vha->req->cnt -= req_cnt;
1509
1510         return 0;
1511 }
1512
1513 /*
1514  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1515  */
1516 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1517 {
1518         /* Adjust ring index. */
1519         vha->req->ring_index++;
1520         if (vha->req->ring_index == vha->req->length) {
1521                 vha->req->ring_index = 0;
1522                 vha->req->ring_ptr = vha->req->ring;
1523         } else {
1524                 vha->req->ring_ptr++;
1525         }
1526         return (cont_entry_t *)vha->req->ring_ptr;
1527 }
1528
1529 /* ha->hardware_lock supposed to be held on entry */
1530 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1531 {
1532         struct qla_hw_data *ha = vha->hw;
1533         uint32_t h;
1534
1535         h = ha->tgt.current_handle;
1536         /* always increment cmd handle */
1537         do {
1538                 ++h;
1539                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1540                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1541                 if (h == ha->tgt.current_handle) {
1542                         ql_dbg(ql_dbg_io, vha, 0x305b,
1543                             "qla_target(%d): Ran out of "
1544                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1545                         h = QLA_TGT_NULL_HANDLE;
1546                         break;
1547                 }
1548         } while ((h == QLA_TGT_NULL_HANDLE) ||
1549             (h == QLA_TGT_SKIP_HANDLE) ||
1550             (ha->tgt.cmds[h-1] != NULL));
1551
1552         if (h != QLA_TGT_NULL_HANDLE)
1553                 ha->tgt.current_handle = h;
1554
1555         return h;
1556 }
1557
1558 /* ha->hardware_lock supposed to be held on entry */
1559 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1560         struct scsi_qla_host *vha)
1561 {
1562         uint32_t h;
1563         struct ctio7_to_24xx *pkt;
1564         struct qla_hw_data *ha = vha->hw;
1565         struct atio_from_isp *atio = &prm->cmd->atio;
1566         uint16_t temp;
1567
1568         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1569         prm->pkt = pkt;
1570         memset(pkt, 0, sizeof(*pkt));
1571
1572         pkt->entry_type = CTIO_TYPE7;
1573         pkt->entry_count = (uint8_t)prm->req_cnt;
1574         pkt->vp_index = vha->vp_idx;
1575
1576         h = qlt_make_handle(vha);
1577         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1578                 /*
1579                  * CTIO type 7 from the firmware doesn't provide a way to
1580                  * know the initiator's LOOP ID, hence we can't find
1581                  * the session and, so, the command.
1582                  */
1583                 return -EAGAIN;
1584         } else
1585                 ha->tgt.cmds[h-1] = prm->cmd;
1586
1587         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1588         pkt->nport_handle = prm->cmd->loop_id;
1589         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1590         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1591         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1592         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1593         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1594         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1595         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
1596         pkt->u.status0.ox_id = cpu_to_le16(temp);
1597         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1598
1599         return 0;
1600 }
1601
1602 /*
1603  * ha->hardware_lock supposed to be held on entry. We have already made sure
1604  * that there is sufficient amount of request entries to not drop it.
1605  */
1606 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1607         struct scsi_qla_host *vha)
1608 {
1609         int cnt;
1610         uint32_t *dword_ptr;
1611         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1612
1613         /* Build continuation packets */
1614         while (prm->seg_cnt > 0) {
1615                 cont_a64_entry_t *cont_pkt64 =
1616                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1617
1618                 /*
1619                  * Make sure that from cont_pkt64 none of
1620                  * 64-bit specific fields used for 32-bit
1621                  * addressing. Cast to (cont_entry_t *) for
1622                  * that.
1623                  */
1624
1625                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1626
1627                 cont_pkt64->entry_count = 1;
1628                 cont_pkt64->sys_define = 0;
1629
1630                 if (enable_64bit_addressing) {
1631                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1632                         dword_ptr =
1633                             (uint32_t *)&cont_pkt64->dseg_0_address;
1634                 } else {
1635                         cont_pkt64->entry_type = CONTINUE_TYPE;
1636                         dword_ptr =
1637                             (uint32_t *)&((cont_entry_t *)
1638                                 cont_pkt64)->dseg_0_address;
1639                 }
1640
1641                 /* Load continuation entry data segments */
1642                 for (cnt = 0;
1643                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1644                     cnt++, prm->seg_cnt--) {
1645                         *dword_ptr++ =
1646                             cpu_to_le32(pci_dma_lo32
1647                                 (sg_dma_address(prm->sg)));
1648                         if (enable_64bit_addressing) {
1649                                 *dword_ptr++ =
1650                                     cpu_to_le32(pci_dma_hi32
1651                                         (sg_dma_address
1652                                         (prm->sg)));
1653                         }
1654                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1655
1656                         prm->sg = sg_next(prm->sg);
1657                 }
1658         }
1659 }
1660
1661 /*
1662  * ha->hardware_lock supposed to be held on entry. We have already made sure
1663  * that there is sufficient amount of request entries to not drop it.
1664  */
1665 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1666         struct scsi_qla_host *vha)
1667 {
1668         int cnt;
1669         uint32_t *dword_ptr;
1670         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1671         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1672
1673         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1674
1675         /* Setup packet address segment pointer */
1676         dword_ptr = pkt24->u.status0.dseg_0_address;
1677
1678         /* Set total data segment count */
1679         if (prm->seg_cnt)
1680                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1681
1682         if (prm->seg_cnt == 0) {
1683                 /* No data transfer */
1684                 *dword_ptr++ = 0;
1685                 *dword_ptr = 0;
1686                 return;
1687         }
1688
1689         /* If scatter gather */
1690
1691         /* Load command entry data segments */
1692         for (cnt = 0;
1693             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1694             cnt++, prm->seg_cnt--) {
1695                 *dword_ptr++ =
1696                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1697                 if (enable_64bit_addressing) {
1698                         *dword_ptr++ =
1699                             cpu_to_le32(pci_dma_hi32(
1700                                 sg_dma_address(prm->sg)));
1701                 }
1702                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1703
1704                 prm->sg = sg_next(prm->sg);
1705         }
1706
1707         qlt_load_cont_data_segments(prm, vha);
1708 }
1709
1710 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1711 {
1712         return cmd->bufflen > 0;
1713 }
1714
1715 /*
1716  * Called without ha->hardware_lock held
1717  */
1718 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1719         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1720         uint32_t *full_req_cnt)
1721 {
1722         struct qla_tgt *tgt = cmd->tgt;
1723         struct scsi_qla_host *vha = tgt->vha;
1724         struct qla_hw_data *ha = vha->hw;
1725         struct se_cmd *se_cmd = &cmd->se_cmd;
1726
1727         if (unlikely(cmd->aborted)) {
1728                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1729                     "qla_target(%d): terminating exchange "
1730                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1731                     se_cmd, cmd->tag);
1732
1733                 cmd->state = QLA_TGT_STATE_ABORTED;
1734                 cmd->cmd_flags |= BIT_6;
1735
1736                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1737
1738                 /* !! At this point cmd could be already freed !! */
1739                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1740         }
1741
1742         prm->cmd = cmd;
1743         prm->tgt = tgt;
1744         prm->rq_result = scsi_status;
1745         prm->sense_buffer = &cmd->sense_buffer[0];
1746         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1747         prm->sg = NULL;
1748         prm->seg_cnt = -1;
1749         prm->req_cnt = 1;
1750         prm->add_status_pkt = 0;
1751
1752         /* Send marker if required */
1753         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1754                 return -EFAULT;
1755
1756         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1757                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1758                         return -EAGAIN;
1759         }
1760
1761         *full_req_cnt = prm->req_cnt;
1762
1763         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1764                 prm->residual = se_cmd->residual_count;
1765                 ql_dbg(ql_dbg_io + ql_dbg_verbose, vha, 0x305c,
1766                     "Residual underflow: %d (tag %d, "
1767                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1768                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1769                     cmd->bufflen, prm->rq_result);
1770                 prm->rq_result |= SS_RESIDUAL_UNDER;
1771         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1772                 prm->residual = se_cmd->residual_count;
1773                 ql_dbg(ql_dbg_io, vha, 0x305d,
1774                     "Residual overflow: %d (tag %d, "
1775                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1776                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1777                     cmd->bufflen, prm->rq_result);
1778                 prm->rq_result |= SS_RESIDUAL_OVER;
1779         }
1780
1781         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1782                 /*
1783                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1784                  * ignored in *xmit_response() below
1785                  */
1786                 if (qlt_has_data(cmd)) {
1787                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1788                             (IS_FWI2_CAPABLE(ha) &&
1789                             (prm->rq_result != 0))) {
1790                                 prm->add_status_pkt = 1;
1791                                 (*full_req_cnt)++;
1792                         }
1793                 }
1794         }
1795
1796         return 0;
1797 }
1798
1799 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1800         struct qla_tgt_cmd *cmd, int sending_sense)
1801 {
1802         if (ha->tgt.enable_class_2)
1803                 return 0;
1804
1805         if (sending_sense)
1806                 return cmd->conf_compl_supported;
1807         else
1808                 return ha->tgt.enable_explicit_conf &&
1809                     cmd->conf_compl_supported;
1810 }
1811
1812 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1813 /*
1814  *  Original taken from the XFS code
1815  */
1816 static unsigned long qlt_srr_random(void)
1817 {
1818         static int Inited;
1819         static unsigned long RandomValue;
1820         static DEFINE_SPINLOCK(lock);
1821         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1822         register long rv;
1823         register long lo;
1824         register long hi;
1825         unsigned long flags;
1826
1827         spin_lock_irqsave(&lock, flags);
1828         if (!Inited) {
1829                 RandomValue = jiffies;
1830                 Inited = 1;
1831         }
1832         rv = RandomValue;
1833         hi = rv / 127773;
1834         lo = rv % 127773;
1835         rv = 16807 * lo - 2836 * hi;
1836         if (rv <= 0)
1837                 rv += 2147483647;
1838         RandomValue = rv;
1839         spin_unlock_irqrestore(&lock, flags);
1840         return rv;
1841 }
1842
1843 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1844 {
1845 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1846         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1847             == 50) {
1848                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1849                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1850                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1851         }
1852 #endif
1853         /*
1854          * It's currently not possible to simulate SRRs for FCP_WRITE without
1855          * a physical link layer failure, so don't even try here..
1856          */
1857         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1858                 return;
1859
1860         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1861             ((qlt_srr_random() % 100) == 20)) {
1862                 int i, leave = 0;
1863                 unsigned int tot_len = 0;
1864
1865                 while (leave == 0)
1866                         leave = qlt_srr_random() % cmd->sg_cnt;
1867
1868                 for (i = 0; i < leave; i++)
1869                         tot_len += cmd->sg[i].length;
1870
1871                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1872                     "Cutting cmd %p (tag %d) buffer"
1873                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1874                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1875                     cmd->bufflen, cmd->sg_cnt);
1876
1877                 cmd->bufflen = tot_len;
1878                 cmd->sg_cnt = leave;
1879         }
1880
1881         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1882                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1883
1884                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1885                     "Cutting cmd %p (tag %d) buffer head "
1886                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1887                     cmd->bufflen);
1888                 if (offset == 0)
1889                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1890                 else if (qlt_set_data_offset(cmd, offset)) {
1891                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1892                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1893                 }
1894         }
1895 }
1896 #else
1897 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1898 {}
1899 #endif
1900
1901 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1902         struct qla_tgt_prm *prm)
1903 {
1904         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1905             (uint32_t)sizeof(ctio->u.status1.sense_data));
1906         ctio->u.status0.flags |=
1907             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1908         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1909                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1910                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1911                     CTIO7_FLAGS_CONFORM_REQ);
1912         }
1913         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1914         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1915         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1916                 int i;
1917
1918                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1919                         if (prm->cmd->se_cmd.scsi_status != 0) {
1920                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1921                                     "Skipping EXPLICIT_CONFORM and "
1922                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1923                                     "non GOOD status\n");
1924                                 goto skip_explict_conf;
1925                         }
1926                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1927                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1928                             CTIO7_FLAGS_CONFORM_REQ);
1929                 }
1930 skip_explict_conf:
1931                 ctio->u.status1.flags &=
1932                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1933                 ctio->u.status1.flags |=
1934                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1935                 ctio->u.status1.scsi_status |=
1936                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1937                 ctio->u.status1.sense_length =
1938                     cpu_to_le16(prm->sense_buffer_len);
1939                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1940                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1941                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1942 #if 0
1943                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1944                         static int q;
1945                         if (q < 10) {
1946                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1947                                     "qla_target(%d): %d bytes of sense "
1948                                     "lost", prm->tgt->ha->vp_idx,
1949                                     prm->sense_buffer_len % 4);
1950                                 q++;
1951                         }
1952                 }
1953 #endif
1954         } else {
1955                 ctio->u.status1.flags &=
1956                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1957                 ctio->u.status1.flags |=
1958                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1959                 ctio->u.status1.sense_length = 0;
1960                 memset(ctio->u.status1.sense_data, 0,
1961                     sizeof(ctio->u.status1.sense_data));
1962         }
1963
1964         /* Sense with len > 24, is it possible ??? */
1965 }
1966
1967
1968
1969 /* diff  */
1970 static inline int
1971 qlt_hba_err_chk_enabled(struct se_cmd *se_cmd)
1972 {
1973         /*
1974          * Uncomment when corresponding SCSI changes are done.
1975          *
1976          if (!sp->cmd->prot_chk)
1977          return 0;
1978          *
1979          */
1980         switch (se_cmd->prot_op) {
1981         case TARGET_PROT_DOUT_INSERT:
1982         case TARGET_PROT_DIN_STRIP:
1983                 if (ql2xenablehba_err_chk >= 1)
1984                         return 1;
1985                 break;
1986         case TARGET_PROT_DOUT_PASS:
1987         case TARGET_PROT_DIN_PASS:
1988                 if (ql2xenablehba_err_chk >= 2)
1989                         return 1;
1990                 break;
1991         case TARGET_PROT_DIN_INSERT:
1992         case TARGET_PROT_DOUT_STRIP:
1993                 return 1;
1994         default:
1995                 break;
1996         }
1997         return 0;
1998 }
1999
2000 /*
2001  * qla24xx_set_t10dif_tags_from_cmd - Extract Ref and App tags from SCSI command
2002  *
2003  */
2004 static inline void
2005 qlt_set_t10dif_tags(struct se_cmd *se_cmd, struct crc_context *ctx)
2006 {
2007         uint32_t lba = 0xffffffff & se_cmd->t_task_lba;
2008
2009         /* wait til Mode Sense/Select cmd, modepage Ah, subpage 2
2010          * have been immplemented by TCM, before AppTag is avail.
2011          * Look for modesense_handlers[]
2012          */
2013         ctx->app_tag = 0;
2014         ctx->app_tag_mask[0] = 0x0;
2015         ctx->app_tag_mask[1] = 0x0;
2016
2017         switch (se_cmd->prot_type) {
2018         case TARGET_DIF_TYPE0_PROT:
2019                 /*
2020                  * No check for ql2xenablehba_err_chk, as it would be an
2021                  * I/O error if hba tag generation is not done.
2022                  */
2023                 ctx->ref_tag = cpu_to_le32(lba);
2024
2025                 if (!qlt_hba_err_chk_enabled(se_cmd))
2026                         break;
2027
2028                 /* enable ALL bytes of the ref tag */
2029                 ctx->ref_tag_mask[0] = 0xff;
2030                 ctx->ref_tag_mask[1] = 0xff;
2031                 ctx->ref_tag_mask[2] = 0xff;
2032                 ctx->ref_tag_mask[3] = 0xff;
2033                 break;
2034         /*
2035          * For TYpe 1 protection: 16 bit GUARD tag, 32 bit REF tag, and
2036          * 16 bit app tag.
2037          */
2038         case TARGET_DIF_TYPE1_PROT:
2039                 ctx->ref_tag = cpu_to_le32(lba);
2040
2041                 if (!qlt_hba_err_chk_enabled(se_cmd))
2042                         break;
2043
2044                 /* enable ALL bytes of the ref tag */
2045                 ctx->ref_tag_mask[0] = 0xff;
2046                 ctx->ref_tag_mask[1] = 0xff;
2047                 ctx->ref_tag_mask[2] = 0xff;
2048                 ctx->ref_tag_mask[3] = 0xff;
2049                 break;
2050         /*
2051          * For TYPE 2 protection: 16 bit GUARD + 32 bit REF tag has to
2052          * match LBA in CDB + N
2053          */
2054         case TARGET_DIF_TYPE2_PROT:
2055                 ctx->ref_tag = cpu_to_le32(lba);
2056
2057                 if (!qlt_hba_err_chk_enabled(se_cmd))
2058                         break;
2059
2060                 /* enable ALL bytes of the ref tag */
2061                 ctx->ref_tag_mask[0] = 0xff;
2062                 ctx->ref_tag_mask[1] = 0xff;
2063                 ctx->ref_tag_mask[2] = 0xff;
2064                 ctx->ref_tag_mask[3] = 0xff;
2065                 break;
2066
2067         /* For Type 3 protection: 16 bit GUARD only */
2068         case TARGET_DIF_TYPE3_PROT:
2069                 ctx->ref_tag_mask[0] = ctx->ref_tag_mask[1] =
2070                         ctx->ref_tag_mask[2] = ctx->ref_tag_mask[3] = 0x00;
2071                 break;
2072         }
2073 }
2074
2075
2076 static inline int
2077 qlt_build_ctio_crc2_pkt(struct qla_tgt_prm *prm, scsi_qla_host_t *vha)
2078 {
2079         uint32_t                *cur_dsd;
2080         int                     sgc;
2081         uint32_t                transfer_length = 0;
2082         uint32_t                data_bytes;
2083         uint32_t                dif_bytes;
2084         uint8_t                 bundling = 1;
2085         uint8_t                 *clr_ptr;
2086         struct crc_context      *crc_ctx_pkt = NULL;
2087         struct qla_hw_data      *ha;
2088         struct ctio_crc2_to_fw  *pkt;
2089         dma_addr_t              crc_ctx_dma;
2090         uint16_t                fw_prot_opts = 0;
2091         struct qla_tgt_cmd      *cmd = prm->cmd;
2092         struct se_cmd           *se_cmd = &cmd->se_cmd;
2093         uint32_t h;
2094         struct atio_from_isp *atio = &prm->cmd->atio;
2095         uint16_t t16;
2096
2097         sgc = 0;
2098         ha = vha->hw;
2099
2100         pkt = (struct ctio_crc2_to_fw *)vha->req->ring_ptr;
2101         prm->pkt = pkt;
2102         memset(pkt, 0, sizeof(*pkt));
2103
2104         ql_dbg(ql_dbg_tgt, vha, 0xe071,
2105                 "qla_target(%d):%s: se_cmd[%p] CRC2 prot_op[0x%x] cmd prot sg:cnt[%p:%x] lba[%llu]\n",
2106                 vha->vp_idx, __func__, se_cmd, se_cmd->prot_op,
2107                 prm->prot_sg, prm->prot_seg_cnt, se_cmd->t_task_lba);
2108
2109         if ((se_cmd->prot_op == TARGET_PROT_DIN_INSERT) ||
2110             (se_cmd->prot_op == TARGET_PROT_DOUT_STRIP))
2111                 bundling = 0;
2112
2113         /* Compute dif len and adjust data len to incude protection */
2114         data_bytes = cmd->bufflen;
2115         dif_bytes  = (data_bytes / cmd->blk_sz) * 8;
2116
2117         switch (se_cmd->prot_op) {
2118         case TARGET_PROT_DIN_INSERT:
2119         case TARGET_PROT_DOUT_STRIP:
2120                 transfer_length = data_bytes;
2121                 data_bytes += dif_bytes;
2122                 break;
2123
2124         case TARGET_PROT_DIN_STRIP:
2125         case TARGET_PROT_DOUT_INSERT:
2126         case TARGET_PROT_DIN_PASS:
2127         case TARGET_PROT_DOUT_PASS:
2128                 transfer_length = data_bytes + dif_bytes;
2129                 break;
2130
2131         default:
2132                 BUG();
2133                 break;
2134         }
2135
2136         if (!qlt_hba_err_chk_enabled(se_cmd))
2137                 fw_prot_opts |= 0x10; /* Disable Guard tag checking */
2138         /* HBA error checking enabled */
2139         else if (IS_PI_UNINIT_CAPABLE(ha)) {
2140                 if ((se_cmd->prot_type == TARGET_DIF_TYPE1_PROT) ||
2141                     (se_cmd->prot_type == TARGET_DIF_TYPE2_PROT))
2142                         fw_prot_opts |= PO_DIS_VALD_APP_ESC;
2143                 else if (se_cmd->prot_type == TARGET_DIF_TYPE3_PROT)
2144                         fw_prot_opts |= PO_DIS_VALD_APP_REF_ESC;
2145         }
2146
2147         switch (se_cmd->prot_op) {
2148         case TARGET_PROT_DIN_INSERT:
2149         case TARGET_PROT_DOUT_INSERT:
2150                 fw_prot_opts |= PO_MODE_DIF_INSERT;
2151                 break;
2152         case TARGET_PROT_DIN_STRIP:
2153         case TARGET_PROT_DOUT_STRIP:
2154                 fw_prot_opts |= PO_MODE_DIF_REMOVE;
2155                 break;
2156         case TARGET_PROT_DIN_PASS:
2157         case TARGET_PROT_DOUT_PASS:
2158                 fw_prot_opts |= PO_MODE_DIF_PASS;
2159                 /* FUTURE: does tcm require T10CRC<->IPCKSUM conversion? */
2160                 break;
2161         default:/* Normal Request */
2162                 fw_prot_opts |= PO_MODE_DIF_PASS;
2163                 break;
2164         }
2165
2166
2167         /* ---- PKT ---- */
2168         /* Update entry type to indicate Command Type CRC_2 IOCB */
2169         pkt->entry_type  = CTIO_CRC2;
2170         pkt->entry_count = 1;
2171         pkt->vp_index = vha->vp_idx;
2172
2173         h = qlt_make_handle(vha);
2174         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
2175                 /*
2176                  * CTIO type 7 from the firmware doesn't provide a way to
2177                  * know the initiator's LOOP ID, hence we can't find
2178                  * the session and, so, the command.
2179                  */
2180                 return -EAGAIN;
2181         } else
2182                 ha->tgt.cmds[h-1] = prm->cmd;
2183
2184
2185         pkt->handle  = h | CTIO_COMPLETION_HANDLE_MARK;
2186         pkt->nport_handle = prm->cmd->loop_id;
2187         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2188         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2189         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2190         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2191         pkt->exchange_addr   = atio->u.isp24.exchange_addr;
2192
2193         /* silence compile warning */
2194         t16 = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2195         pkt->ox_id  = cpu_to_le16(t16);
2196
2197         t16 = (atio->u.isp24.attr << 9);
2198         pkt->flags |= cpu_to_le16(t16);
2199         pkt->relative_offset = cpu_to_le32(prm->cmd->offset);
2200
2201         /* Set transfer direction */
2202         if (cmd->dma_data_direction == DMA_TO_DEVICE)
2203                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN);
2204         else if (cmd->dma_data_direction == DMA_FROM_DEVICE)
2205                 pkt->flags = __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT);
2206
2207
2208         pkt->dseg_count = prm->tot_dsds;
2209         /* Fibre channel byte count */
2210         pkt->transfer_length = cpu_to_le32(transfer_length);
2211
2212
2213         /* ----- CRC context -------- */
2214
2215         /* Allocate CRC context from global pool */
2216         crc_ctx_pkt = cmd->ctx =
2217             dma_pool_alloc(ha->dl_dma_pool, GFP_ATOMIC, &crc_ctx_dma);
2218
2219         if (!crc_ctx_pkt)
2220                 goto crc_queuing_error;
2221
2222         /* Zero out CTX area. */
2223         clr_ptr = (uint8_t *)crc_ctx_pkt;
2224         memset(clr_ptr, 0, sizeof(*crc_ctx_pkt));
2225
2226         crc_ctx_pkt->crc_ctx_dma = crc_ctx_dma;
2227         INIT_LIST_HEAD(&crc_ctx_pkt->dsd_list);
2228
2229         /* Set handle */
2230         crc_ctx_pkt->handle = pkt->handle;
2231
2232         qlt_set_t10dif_tags(se_cmd, crc_ctx_pkt);
2233
2234         pkt->crc_context_address[0] = cpu_to_le32(LSD(crc_ctx_dma));
2235         pkt->crc_context_address[1] = cpu_to_le32(MSD(crc_ctx_dma));
2236         pkt->crc_context_len = CRC_CONTEXT_LEN_FW;
2237
2238
2239         if (!bundling) {
2240                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.nobundling.data_address;
2241         } else {
2242                 /*
2243                  * Configure Bundling if we need to fetch interlaving
2244                  * protection PCI accesses
2245                  */
2246                 fw_prot_opts |= PO_ENABLE_DIF_BUNDLING;
2247                 crc_ctx_pkt->u.bundling.dif_byte_count = cpu_to_le32(dif_bytes);
2248                 crc_ctx_pkt->u.bundling.dseg_count =
2249                         cpu_to_le16(prm->tot_dsds - prm->prot_seg_cnt);
2250                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.data_address;
2251         }
2252
2253         /* Finish the common fields of CRC pkt */
2254         crc_ctx_pkt->blk_size   = cpu_to_le16(cmd->blk_sz);
2255         crc_ctx_pkt->prot_opts  = cpu_to_le16(fw_prot_opts);
2256         crc_ctx_pkt->byte_count = cpu_to_le32(data_bytes);
2257         crc_ctx_pkt->guard_seed = __constant_cpu_to_le16(0);
2258
2259
2260         /* Walks data segments */
2261         pkt->flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DSD_PTR);
2262
2263         if (!bundling && prm->prot_seg_cnt) {
2264                 if (qla24xx_walk_and_build_sglist_no_difb(ha, NULL, cur_dsd,
2265                         prm->tot_dsds, cmd))
2266                         goto crc_queuing_error;
2267         } else if (qla24xx_walk_and_build_sglist(ha, NULL, cur_dsd,
2268                 (prm->tot_dsds - prm->prot_seg_cnt), cmd))
2269                 goto crc_queuing_error;
2270
2271         if (bundling && prm->prot_seg_cnt) {
2272                 /* Walks dif segments */
2273                 pkt->add_flags |= CTIO_CRC2_AF_DIF_DSD_ENA;
2274
2275                 cur_dsd = (uint32_t *) &crc_ctx_pkt->u.bundling.dif_address;
2276                 if (qla24xx_walk_and_build_prot_sglist(ha, NULL, cur_dsd,
2277                         prm->prot_seg_cnt, cmd))
2278                         goto crc_queuing_error;
2279         }
2280         return QLA_SUCCESS;
2281
2282 crc_queuing_error:
2283         /* Cleanup will be performed by the caller */
2284
2285         return QLA_FUNCTION_FAILED;
2286 }
2287
2288
2289 /*
2290  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2291  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2292  */
2293 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2294         uint8_t scsi_status)
2295 {
2296         struct scsi_qla_host *vha = cmd->vha;
2297         struct qla_hw_data *ha = vha->hw;
2298         struct ctio7_to_24xx *pkt;
2299         struct qla_tgt_prm prm;
2300         uint32_t full_req_cnt = 0;
2301         unsigned long flags = 0;
2302         int res;
2303
2304         memset(&prm, 0, sizeof(prm));
2305         qlt_check_srr_debug(cmd, &xmit_type);
2306
2307         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2308             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, cmd->dma_data_direction=%d se_cmd[%p]\n",
2309             (xmit_type & QLA_TGT_XMIT_STATUS) ?
2310             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction,
2311             &cmd->se_cmd);
2312
2313         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2314             &full_req_cnt);
2315         if (unlikely(res != 0)) {
2316                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2317                         return 0;
2318
2319                 return res;
2320         }
2321
2322         spin_lock_irqsave(&ha->hardware_lock, flags);
2323
2324         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2325                 /*
2326                  * Either a chip reset is active or this request was from
2327                  * previous life, just abort the processing.
2328                  */
2329                 cmd->state = QLA_TGT_STATE_PROCESSED;
2330                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2331                 ql_dbg(ql_dbg_async, vha, 0xe101,
2332                         "RESET-RSP active/old-count/new-count = %d/%d/%d.\n",
2333                         qla2x00_reset_active(vha), cmd->reset_count,
2334                         ha->chip_reset);
2335                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2336                 return 0;
2337         }
2338
2339         /* Does F/W have an IOCBs for this request */
2340         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2341         if (unlikely(res))
2342                 goto out_unmap_unlock;
2343
2344         if (cmd->se_cmd.prot_op && (xmit_type & QLA_TGT_XMIT_DATA))
2345                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2346         else
2347                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2348         if (unlikely(res != 0))
2349                 goto out_unmap_unlock;
2350
2351
2352         pkt = (struct ctio7_to_24xx *)prm.pkt;
2353
2354         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2355                 pkt->u.status0.flags |=
2356                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2357                         CTIO7_FLAGS_STATUS_MODE_0);
2358
2359                 if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2360                         qlt_load_data_segments(&prm, vha);
2361
2362                 if (prm.add_status_pkt == 0) {
2363                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2364                                 pkt->u.status0.scsi_status =
2365                                     cpu_to_le16(prm.rq_result);
2366                                 pkt->u.status0.residual =
2367                                     cpu_to_le32(prm.residual);
2368                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2369                                     CTIO7_FLAGS_SEND_STATUS);
2370                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2371                                         pkt->u.status0.flags |=
2372                                             __constant_cpu_to_le16(
2373                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2374                                                 CTIO7_FLAGS_CONFORM_REQ);
2375                                 }
2376                         }
2377
2378                 } else {
2379                         /*
2380                          * We have already made sure that there is sufficient
2381                          * amount of request entries to not drop HW lock in
2382                          * req_pkt().
2383                          */
2384                         struct ctio7_to_24xx *ctio =
2385                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2386
2387                         ql_dbg(ql_dbg_io, vha, 0x305e,
2388                             "Building additional status packet 0x%p.\n",
2389                             ctio);
2390
2391                         /*
2392                          * T10Dif: ctio_crc2_to_fw overlay ontop of
2393                          * ctio7_to_24xx
2394                          */
2395                         memcpy(ctio, pkt, sizeof(*ctio));
2396                         /* reset back to CTIO7 */
2397                         ctio->entry_count = 1;
2398                         ctio->entry_type = CTIO_TYPE7;
2399                         ctio->dseg_count = 0;
2400                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2401                             CTIO7_FLAGS_DATA_IN);
2402
2403                         /* Real finish is ctio_m1's finish */
2404                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2405                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2406                             CTIO7_FLAGS_DONT_RET_CTIO);
2407
2408                         /* qlt_24xx_init_ctio_to_isp will correct
2409                          * all neccessary fields that's part of CTIO7.
2410                          * There should be no residual of CTIO-CRC2 data.
2411                          */
2412                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2413                             &prm);
2414                         pr_debug("Status CTIO7: %p\n", ctio);
2415                 }
2416         } else
2417                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2418
2419
2420         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2421         cmd->cmd_sent_to_fw = 1;
2422
2423         /* Memory Barrier */
2424         wmb();
2425         qla2x00_start_iocbs(vha, vha->req);
2426         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2427
2428         return 0;
2429
2430 out_unmap_unlock:
2431         if (cmd->sg_mapped)
2432                 qlt_unmap_sg(vha, cmd);
2433         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2434
2435         return res;
2436 }
2437 EXPORT_SYMBOL(qlt_xmit_response);
2438
2439 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2440 {
2441         struct ctio7_to_24xx *pkt;
2442         struct scsi_qla_host *vha = cmd->vha;
2443         struct qla_hw_data *ha = vha->hw;
2444         struct qla_tgt *tgt = cmd->tgt;
2445         struct qla_tgt_prm prm;
2446         unsigned long flags;
2447         int res = 0;
2448
2449         memset(&prm, 0, sizeof(prm));
2450         prm.cmd = cmd;
2451         prm.tgt = tgt;
2452         prm.sg = NULL;
2453         prm.req_cnt = 1;
2454
2455         /* Send marker if required */
2456         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2457                 return -EIO;
2458
2459         /* Calculate number of entries and segments required */
2460         if (qlt_pci_map_calc_cnt(&prm) != 0)
2461                 return -EAGAIN;
2462
2463         spin_lock_irqsave(&ha->hardware_lock, flags);
2464
2465         if (qla2x00_reset_active(vha) || cmd->reset_count != ha->chip_reset) {
2466                 /*
2467                  * Either a chip reset is active or this request was from
2468                  * previous life, just abort the processing.
2469                  */
2470                 cmd->state = QLA_TGT_STATE_NEED_DATA;
2471                 qlt_abort_cmd_on_host_reset(cmd->vha, cmd);
2472                 ql_dbg(ql_dbg_async, vha, 0xe102,
2473                         "RESET-XFR active/old-count/new-count = %d/%d/%d.\n",
2474                         qla2x00_reset_active(vha), cmd->reset_count,
2475                         ha->chip_reset);
2476                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2477                 return 0;
2478         }
2479
2480         /* Does F/W have an IOCBs for this request */
2481         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2482         if (res != 0)
2483                 goto out_unlock_free_unmap;
2484         if (cmd->se_cmd.prot_op)
2485                 res = qlt_build_ctio_crc2_pkt(&prm, vha);
2486         else
2487                 res = qlt_24xx_build_ctio_pkt(&prm, vha);
2488
2489         if (unlikely(res != 0))
2490                 goto out_unlock_free_unmap;
2491         pkt = (struct ctio7_to_24xx *)prm.pkt;
2492         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2493             CTIO7_FLAGS_STATUS_MODE_0);
2494
2495         if (cmd->se_cmd.prot_op == TARGET_PROT_NORMAL)
2496                 qlt_load_data_segments(&prm, vha);
2497
2498         cmd->state = QLA_TGT_STATE_NEED_DATA;
2499         cmd->cmd_sent_to_fw = 1;
2500
2501         /* Memory Barrier */
2502         wmb();
2503         qla2x00_start_iocbs(vha, vha->req);
2504         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2505
2506         return res;
2507
2508 out_unlock_free_unmap:
2509         if (cmd->sg_mapped)
2510                 qlt_unmap_sg(vha, cmd);
2511         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2512
2513         return res;
2514 }
2515 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2516
2517
2518 /*
2519  * Checks the guard or meta-data for the type of error
2520  * detected by the HBA.
2521  */
2522 static inline int
2523 qlt_handle_dif_error(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd,
2524                 struct ctio_crc_from_fw *sts)
2525 {
2526         uint8_t         *ap = &sts->actual_dif[0];
2527         uint8_t         *ep = &sts->expected_dif[0];
2528         uint32_t        e_ref_tag, a_ref_tag;
2529         uint16_t        e_app_tag, a_app_tag;
2530         uint16_t        e_guard, a_guard;
2531         uint64_t        lba = cmd->se_cmd.t_task_lba;
2532
2533         a_guard   = be16_to_cpu(*(uint16_t *)(ap + 0));
2534         a_app_tag = be16_to_cpu(*(uint16_t *)(ap + 2));
2535         a_ref_tag = be32_to_cpu(*(uint32_t *)(ap + 4));
2536
2537         e_guard   = be16_to_cpu(*(uint16_t *)(ep + 0));
2538         e_app_tag = be16_to_cpu(*(uint16_t *)(ep + 2));
2539         e_ref_tag = be32_to_cpu(*(uint32_t *)(ep + 4));
2540
2541         ql_dbg(ql_dbg_tgt, vha, 0xe075,
2542             "iocb(s) %p Returned STATUS.\n", sts);
2543
2544         ql_dbg(ql_dbg_tgt, vha, 0xf075,
2545             "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",
2546             cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2547             a_ref_tag, e_ref_tag, a_app_tag, e_app_tag, a_guard, e_guard);
2548
2549         /*
2550          * Ignore sector if:
2551          * For type     3: ref & app tag is all 'f's
2552          * For type 0,1,2: app tag is all 'f's
2553          */
2554         if ((a_app_tag == 0xffff) &&
2555             ((cmd->se_cmd.prot_type != TARGET_DIF_TYPE3_PROT) ||
2556              (a_ref_tag == 0xffffffff))) {
2557                 uint32_t blocks_done;
2558
2559                 /* 2TB boundary case covered automatically with this */
2560                 blocks_done = e_ref_tag - (uint32_t)lba + 1;
2561                 cmd->se_cmd.bad_sector = e_ref_tag;
2562                 cmd->se_cmd.pi_err = 0;
2563                 ql_dbg(ql_dbg_tgt, vha, 0xf074,
2564                         "need to return scsi good\n");
2565
2566                 /* Update protection tag */
2567                 if (cmd->prot_sg_cnt) {
2568                         uint32_t i, j = 0, k = 0, num_ent;
2569                         struct scatterlist *sg, *sgl;
2570
2571
2572                         sgl = cmd->prot_sg;
2573
2574                         /* Patch the corresponding protection tags */
2575                         for_each_sg(sgl, sg, cmd->prot_sg_cnt, i) {
2576                                 num_ent = sg_dma_len(sg) / 8;
2577                                 if (k + num_ent < blocks_done) {
2578                                         k += num_ent;
2579                                         continue;
2580                                 }
2581                                 j = blocks_done - k - 1;
2582                                 k = blocks_done;
2583                                 break;
2584                         }
2585
2586                         if (k != blocks_done) {
2587                                 ql_log(ql_log_warn, vha, 0xf076,
2588                                     "unexpected tag values tag:lba=%u:%llu)\n",
2589                                     e_ref_tag, (unsigned long long)lba);
2590                                 goto out;
2591                         }
2592
2593 #if 0
2594                         struct sd_dif_tuple *spt;
2595                         /* TODO:
2596                          * This section came from initiator. Is it valid here?
2597                          * should ulp be override with actual val???
2598                          */
2599                         spt = page_address(sg_page(sg)) + sg->offset;
2600                         spt += j;
2601
2602                         spt->app_tag = 0xffff;
2603                         if (cmd->se_cmd.prot_type == SCSI_PROT_DIF_TYPE3)
2604                                 spt->ref_tag = 0xffffffff;
2605 #endif
2606                 }
2607
2608                 return 0;
2609         }
2610
2611         /* check guard */
2612         if (e_guard != a_guard) {
2613                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
2614                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2615
2616                 ql_log(ql_log_warn, vha, 0xe076,
2617                     "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",
2618                     cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2619                     a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2620                     a_guard, e_guard, cmd);
2621                 goto out;
2622         }
2623
2624         /* check ref tag */
2625         if (e_ref_tag != a_ref_tag) {
2626                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
2627                 cmd->se_cmd.bad_sector = e_ref_tag;
2628
2629                 ql_log(ql_log_warn, vha, 0xe077,
2630                         "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",
2631                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2632                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2633                         a_guard, e_guard, cmd);
2634                 goto out;
2635         }
2636
2637         /* check appl tag */
2638         if (e_app_tag != a_app_tag) {
2639                 cmd->se_cmd.pi_err = TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
2640                 cmd->se_cmd.bad_sector = cmd->se_cmd.t_task_lba;
2641
2642                 ql_log(ql_log_warn, vha, 0xe078,
2643                         "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",
2644                         cmd->atio.u.isp24.fcp_cmnd.cdb[0], lba,
2645                         a_ref_tag, e_ref_tag, a_app_tag, e_app_tag,
2646                         a_guard, e_guard, cmd);
2647                 goto out;
2648         }
2649 out:
2650         return 1;
2651 }
2652
2653
2654 /* If hardware_lock held on entry, might drop it, then reaquire */
2655 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2656 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2657         struct qla_tgt_cmd *cmd,
2658         struct atio_from_isp *atio)
2659 {
2660         struct ctio7_to_24xx *ctio24;
2661         struct qla_hw_data *ha = vha->hw;
2662         request_t *pkt;
2663         int ret = 0;
2664         uint16_t temp;
2665
2666         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2667
2668         pkt = (request_t *)qla2x00_alloc_iocbs_ready(vha, NULL);
2669         if (pkt == NULL) {
2670                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2671                     "qla_target(%d): %s failed: unable to allocate "
2672                     "request packet\n", vha->vp_idx, __func__);
2673                 return -ENOMEM;
2674         }
2675
2676         if (cmd != NULL) {
2677                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2678                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2679                             "qla_target(%d): Terminating cmd %p with "
2680                             "incorrect state %d\n", vha->vp_idx, cmd,
2681                             cmd->state);
2682                 } else
2683                         ret = 1;
2684         }
2685
2686         pkt->entry_count = 1;
2687         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2688
2689         ctio24 = (struct ctio7_to_24xx *)pkt;
2690         ctio24->entry_type = CTIO_TYPE7;
2691         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2692         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2693         ctio24->vp_index = vha->vp_idx;
2694         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2695         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2696         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2697         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2698         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2699             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2700                 CTIO7_FLAGS_TERMINATE);
2701         temp = be16_to_cpu(atio->u.isp24.fcp_hdr.ox_id);
2702         ctio24->u.status1.ox_id = cpu_to_le16(temp);
2703
2704         /* Most likely, it isn't needed */
2705         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2706             &atio->u.isp24.fcp_cmnd.add_cdb[
2707             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2708         if (ctio24->u.status1.residual != 0)
2709                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2710
2711         /* Memory Barrier */
2712         wmb();
2713         qla2x00_start_iocbs(vha, vha->req);
2714         return ret;
2715 }
2716
2717 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2718         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2719 {
2720         unsigned long flags;
2721         int rc;
2722
2723         if (qlt_issue_marker(vha, ha_locked) < 0)
2724                 return;
2725
2726         if (ha_locked) {
2727                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2728                 if (rc == -ENOMEM)
2729                         qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2730                 goto done;
2731         }
2732         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2733         rc = __qlt_send_term_exchange(vha, cmd, atio);
2734         if (rc == -ENOMEM)
2735                 qlt_alloc_qfull_cmd(vha, atio, 0, 0);
2736         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2737
2738 done:
2739         if (cmd && ((cmd->state != QLA_TGT_STATE_ABORTED) ||
2740             !cmd->cmd_sent_to_fw)) {
2741                 if (!ha_locked && !in_interrupt())
2742                         msleep(250); /* just in case */
2743
2744                 if (cmd->sg_mapped)
2745                         qlt_unmap_sg(vha, cmd);
2746                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2747         }
2748         return;
2749 }
2750
2751 static void qlt_init_term_exchange(struct scsi_qla_host *vha)
2752 {
2753         struct list_head free_list;
2754         struct qla_tgt_cmd *cmd, *tcmd;
2755
2756         vha->hw->tgt.leak_exchg_thresh_hold =
2757             (vha->hw->fw_xcb_count/100) * LEAK_EXCHG_THRESH_HOLD_PERCENT;
2758
2759         cmd = tcmd = NULL;
2760         if (!list_empty(&vha->hw->tgt.q_full_list)) {
2761                 INIT_LIST_HEAD(&free_list);
2762                 list_splice_init(&vha->hw->tgt.q_full_list, &free_list);
2763
2764                 list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
2765                         list_del(&cmd->cmd_list);
2766                         /* This cmd was never sent to TCM.  There is no need
2767                          * to schedule free or call free_cmd
2768                          */
2769                         qlt_free_cmd(cmd);
2770                         vha->hw->tgt.num_qfull_cmds_alloc--;
2771                 }
2772         }
2773         vha->hw->tgt.num_qfull_cmds_dropped = 0;
2774 }
2775
2776 static void qlt_chk_exch_leak_thresh_hold(struct scsi_qla_host *vha)
2777 {
2778         uint32_t total_leaked;
2779
2780         total_leaked = vha->hw->tgt.num_qfull_cmds_dropped;
2781
2782         if (vha->hw->tgt.leak_exchg_thresh_hold &&
2783             (total_leaked > vha->hw->tgt.leak_exchg_thresh_hold)) {
2784
2785                 ql_dbg(ql_dbg_tgt, vha, 0xe079,
2786                     "Chip reset due to exchange starvation: %d/%d.\n",
2787                     total_leaked, vha->hw->fw_xcb_count);
2788
2789                 if (IS_P3P_TYPE(vha->hw))
2790                         set_bit(FCOE_CTX_RESET_NEEDED, &vha->dpc_flags);
2791                 else
2792                         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
2793                 qla2xxx_wake_dpc(vha);
2794         }
2795
2796 }
2797
2798 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2799 {
2800         struct qla_tgt_sess *sess = cmd->sess;
2801
2802         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe074,
2803             "%s: se_cmd[%p] ox_id %04x\n",
2804             __func__, &cmd->se_cmd,
2805             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
2806
2807         BUG_ON(cmd->cmd_in_wq);
2808
2809         if (!cmd->q_full)
2810                 qlt_decr_num_pend_cmds(cmd->vha);
2811
2812         BUG_ON(cmd->sg_mapped);
2813         cmd->jiffies_at_free = get_jiffies_64();
2814         if (unlikely(cmd->free_sg))
2815                 kfree(cmd->sg);
2816
2817         if (!sess || !sess->se_sess) {
2818                 WARN_ON(1);
2819                 return;
2820         }
2821         cmd->jiffies_at_free = get_jiffies_64();
2822         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
2823 }
2824 EXPORT_SYMBOL(qlt_free_cmd);
2825
2826 /* ha->hardware_lock supposed to be held on entry */
2827 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2828         struct qla_tgt_cmd *cmd, void *ctio)
2829 {
2830         struct qla_tgt_srr_ctio *sc;
2831         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2832         struct qla_tgt_srr_imm *imm;
2833
2834         tgt->ctio_srr_id++;
2835         cmd->cmd_flags |= BIT_15;
2836
2837         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2838             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2839
2840         if (!ctio) {
2841                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2842                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2843                     vha->vp_idx);
2844                 return -EINVAL;
2845         }
2846
2847         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2848         if (sc != NULL) {
2849                 sc->cmd = cmd;
2850                 /* IRQ is already OFF */
2851                 spin_lock(&tgt->srr_lock);
2852                 sc->srr_id = tgt->ctio_srr_id;
2853                 list_add_tail(&sc->srr_list_entry,
2854                     &tgt->srr_ctio_list);
2855                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2856                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2857                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2858                         int found = 0;
2859                         list_for_each_entry(imm, &tgt->srr_imm_list,
2860                             srr_list_entry) {
2861                                 if (imm->srr_id == sc->srr_id) {
2862                                         found = 1;
2863                                         break;
2864                                 }
2865                         }
2866                         if (found) {
2867                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2868                                     "Scheduling srr work\n");
2869                                 schedule_work(&tgt->srr_work);
2870                         } else {
2871                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2872                                     "qla_target(%d): imm_srr_id "
2873                                     "== ctio_srr_id (%d), but there is no "
2874                                     "corresponding SRR IMM, deleting CTIO "
2875                                     "SRR %p\n", vha->vp_idx,
2876                                     tgt->ctio_srr_id, sc);
2877                                 list_del(&sc->srr_list_entry);
2878                                 spin_unlock(&tgt->srr_lock);
2879
2880                                 kfree(sc);
2881                                 return -EINVAL;
2882                         }
2883                 }
2884                 spin_unlock(&tgt->srr_lock);
2885         } else {
2886                 struct qla_tgt_srr_imm *ti;
2887
2888                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2889                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2890                     vha->vp_idx);
2891                 spin_lock(&tgt->srr_lock);
2892                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2893                     srr_list_entry) {
2894                         if (imm->srr_id == tgt->ctio_srr_id) {
2895                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2896                                     "IMM SRR %p deleted (id %d)\n",
2897                                     imm, imm->srr_id);
2898                                 list_del(&imm->srr_list_entry);
2899                                 qlt_reject_free_srr_imm(vha, imm, 1);
2900                         }
2901                 }
2902                 spin_unlock(&tgt->srr_lock);
2903
2904                 return -ENOMEM;
2905         }
2906
2907         return 0;
2908 }
2909
2910 /*
2911  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2912  */
2913 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2914         struct qla_tgt_cmd *cmd, uint32_t status)
2915 {
2916         int term = 0;
2917
2918         if (ctio != NULL) {
2919                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2920                 term = !(c->flags &
2921                     __constant_cpu_to_le16(OF_TERM_EXCH));
2922         } else
2923                 term = 1;
2924
2925         if (term)
2926                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2927
2928         return term;
2929 }
2930
2931 /* ha->hardware_lock supposed to be held on entry */
2932 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2933         uint32_t handle)
2934 {
2935         struct qla_hw_data *ha = vha->hw;
2936
2937         handle--;
2938         if (ha->tgt.cmds[handle] != NULL) {
2939                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2940                 ha->tgt.cmds[handle] = NULL;
2941                 return cmd;
2942         } else
2943                 return NULL;
2944 }
2945
2946 /* ha->hardware_lock supposed to be held on entry */
2947 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2948         uint32_t handle, void *ctio)
2949 {
2950         struct qla_tgt_cmd *cmd = NULL;
2951
2952         /* Clear out internal marks */
2953         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2954             CTIO_INTERMEDIATE_HANDLE_MARK);
2955
2956         if (handle != QLA_TGT_NULL_HANDLE) {
2957                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE))
2958                         return NULL;
2959
2960                 /* handle-1 is actually used */
2961                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2962                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2963                             "qla_target(%d): Wrong handle %x received\n",
2964                             vha->vp_idx, handle);
2965                         return NULL;
2966                 }
2967                 cmd = qlt_get_cmd(vha, handle);
2968                 if (unlikely(cmd == NULL)) {
2969                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2970                             "qla_target(%d): Suspicious: unable to "
2971                             "find the command with handle %x\n", vha->vp_idx,
2972                             handle);
2973                         return NULL;
2974                 }
2975         } else if (ctio != NULL) {
2976                 /* We can't get loop ID from CTIO7 */
2977                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2978                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2979                     "support NULL handles\n", vha->vp_idx);
2980                 return NULL;
2981         }
2982
2983         return cmd;
2984 }
2985
2986 /* hardware_lock should be held by caller. */
2987 static void
2988 qlt_abort_cmd_on_host_reset(struct scsi_qla_host *vha, struct qla_tgt_cmd *cmd)
2989 {
2990         struct qla_hw_data *ha = vha->hw;
2991         uint32_t handle;
2992
2993         if (cmd->sg_mapped)
2994                 qlt_unmap_sg(vha, cmd);
2995
2996         handle = qlt_make_handle(vha);
2997
2998         /* TODO: fix debug message type and ids. */
2999         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3000                 ql_dbg(ql_dbg_io, vha, 0xff00,
3001                     "HOST-ABORT: handle=%d, state=PROCESSED.\n", handle);
3002         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3003                 cmd->write_data_transferred = 0;
3004                 cmd->state = QLA_TGT_STATE_DATA_IN;
3005
3006                 ql_dbg(ql_dbg_io, vha, 0xff01,
3007                     "HOST-ABORT: handle=%d, state=DATA_IN.\n", handle);
3008
3009                 ha->tgt.tgt_ops->handle_data(cmd);
3010                 return;
3011         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3012                 ql_dbg(ql_dbg_io, vha, 0xff02,
3013                     "HOST-ABORT: handle=%d, state=ABORTED.\n", handle);
3014         } else {
3015                 ql_dbg(ql_dbg_io, vha, 0xff03,
3016                     "HOST-ABORT: handle=%d, state=BAD(%d).\n", handle,
3017                     cmd->state);
3018                 dump_stack();
3019         }
3020
3021         cmd->cmd_flags |= BIT_12;
3022         ha->tgt.tgt_ops->free_cmd(cmd);
3023 }
3024
3025 void
3026 qlt_host_reset_handler(struct qla_hw_data *ha)
3027 {
3028         struct qla_tgt_cmd *cmd;
3029         unsigned long flags;
3030         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
3031         scsi_qla_host_t *vha = NULL;
3032         struct qla_tgt *tgt = base_vha->vha_tgt.qla_tgt;
3033         uint32_t i;
3034
3035         if (!base_vha->hw->tgt.tgt_ops)
3036                 return;
3037
3038         if (!tgt || qla_ini_mode_enabled(base_vha)) {
3039                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
3040                         "Target mode disabled\n");
3041                 return;
3042         }
3043
3044         ql_dbg(ql_dbg_tgt_mgt, vha, 0xff10,
3045             "HOST-ABORT-HNDLR: base_vha->dpc_flags=%lx.\n",
3046             base_vha->dpc_flags);
3047
3048         spin_lock_irqsave(&ha->hardware_lock, flags);
3049         for (i = 1; i < DEFAULT_OUTSTANDING_COMMANDS + 1; i++) {
3050                 cmd = qlt_get_cmd(base_vha, i);
3051                 if (!cmd)
3052                         continue;
3053                 /* ha->tgt.cmds entry is cleared by qlt_get_cmd. */
3054                 vha = cmd->vha;
3055                 qlt_abort_cmd_on_host_reset(vha, cmd);
3056         }
3057         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3058 }
3059
3060
3061 /*
3062  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3063  */
3064 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
3065         uint32_t status, void *ctio)
3066 {
3067         struct qla_hw_data *ha = vha->hw;
3068         struct se_cmd *se_cmd;
3069         struct target_core_fabric_ops *tfo;
3070         struct qla_tgt_cmd *cmd;
3071
3072         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
3073                 /* That could happen only in case of an error/reset/abort */
3074                 if (status != CTIO_SUCCESS) {
3075                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
3076                             "Intermediate CTIO received"
3077                             " (status %x)\n", status);
3078                 }
3079                 return;
3080         }
3081
3082         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
3083         if (cmd == NULL)
3084                 return;
3085
3086         se_cmd = &cmd->se_cmd;
3087         tfo = se_cmd->se_tfo;
3088         cmd->cmd_sent_to_fw = 0;
3089
3090         if (cmd->sg_mapped)
3091                 qlt_unmap_sg(vha, cmd);
3092
3093         if (unlikely(status != CTIO_SUCCESS)) {
3094                 switch (status & 0xFFFF) {
3095                 case CTIO_LIP_RESET:
3096                 case CTIO_TARGET_RESET:
3097                 case CTIO_ABORTED:
3098                         /* driver request abort via Terminate exchange */
3099                 case CTIO_TIMEOUT:
3100                 case CTIO_INVALID_RX_ID:
3101                         /* They are OK */
3102                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
3103                             "qla_target(%d): CTIO with "
3104                             "status %#x received, state %x, se_cmd %p, "
3105                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
3106                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
3107                             status, cmd->state, se_cmd);
3108                         break;
3109
3110                 case CTIO_PORT_LOGGED_OUT:
3111                 case CTIO_PORT_UNAVAILABLE:
3112                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
3113                             "qla_target(%d): CTIO with PORT LOGGED "
3114                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
3115                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
3116                             status, cmd->state, se_cmd);
3117                         break;
3118
3119                 case CTIO_SRR_RECEIVED:
3120                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
3121                             "qla_target(%d): CTIO with SRR_RECEIVED"
3122                             " status %x received (state %x, se_cmd %p)\n",
3123                             vha->vp_idx, status, cmd->state, se_cmd);
3124                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
3125                                 break;
3126                         else
3127                                 return;
3128
3129                 case CTIO_DIF_ERROR: {
3130                         struct ctio_crc_from_fw *crc =
3131                                 (struct ctio_crc_from_fw *)ctio;
3132                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf073,
3133                             "qla_target(%d): CTIO with DIF_ERROR status %x received (state %x, se_cmd %p) actual_dif[0x%llx] expect_dif[0x%llx]\n",
3134                             vha->vp_idx, status, cmd->state, se_cmd,
3135                             *((u64 *)&crc->actual_dif[0]),
3136                             *((u64 *)&crc->expected_dif[0]));
3137
3138                         if (qlt_handle_dif_error(vha, cmd, ctio)) {
3139                                 if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3140                                         /* scsi Write/xfer rdy complete */
3141                                         goto skip_term;
3142                                 } else {
3143                                         /* scsi read/xmit respond complete
3144                                          * call handle dif to send scsi status
3145                                          * rather than terminate exchange.
3146                                          */
3147                                         cmd->state = QLA_TGT_STATE_PROCESSED;
3148                                         ha->tgt.tgt_ops->handle_dif_err(cmd);
3149                                         return;
3150                                 }
3151                         } else {
3152                                 /* Need to generate a SCSI good completion.
3153                                  * because FW did not send scsi status.
3154                                  */
3155                                 status = 0;
3156                                 goto skip_term;
3157                         }
3158                         break;
3159                 }
3160                 default:
3161                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
3162                             "qla_target(%d): CTIO with error status 0x%x received (state %x, se_cmd %p\n",
3163                             vha->vp_idx, status, cmd->state, se_cmd);
3164                         break;
3165                 }
3166
3167
3168                 /* "cmd->state == QLA_TGT_STATE_ABORTED" means
3169                  * cmd is already aborted/terminated, we don't
3170                  * need to terminate again.  The exchange is already
3171                  * cleaned up/freed at FW level.  Just cleanup at driver
3172                  * level.
3173                  */
3174                 if ((cmd->state != QLA_TGT_STATE_NEED_DATA) &&
3175                     (cmd->state != QLA_TGT_STATE_ABORTED)) {
3176                         cmd->cmd_flags |= BIT_13;
3177                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
3178                                 return;
3179                 }
3180         }
3181 skip_term:
3182
3183         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
3184                 ;
3185         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3186                 int rx_status = 0;
3187
3188                 cmd->state = QLA_TGT_STATE_DATA_IN;
3189
3190                 if (unlikely(status != CTIO_SUCCESS))
3191                         rx_status = -EIO;
3192                 else
3193                         cmd->write_data_transferred = 1;
3194
3195                 ha->tgt.tgt_ops->handle_data(cmd);
3196                 return;
3197         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
3198                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
3199                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
3200         } else {
3201                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
3202                     "qla_target(%d): A command in state (%d) should "
3203                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
3204         }
3205
3206         if (unlikely(status != CTIO_SUCCESS) &&
3207                 (cmd->state != QLA_TGT_STATE_ABORTED)) {
3208                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
3209                 dump_stack();
3210         }
3211
3212
3213         ha->tgt.tgt_ops->free_cmd(cmd);
3214 }
3215
3216 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
3217         uint8_t task_codes)
3218 {
3219         int fcp_task_attr;
3220
3221         switch (task_codes) {
3222         case ATIO_SIMPLE_QUEUE:
3223                 fcp_task_attr = MSG_SIMPLE_TAG;
3224                 break;
3225         case ATIO_HEAD_OF_QUEUE:
3226                 fcp_task_attr = MSG_HEAD_TAG;
3227                 break;
3228         case ATIO_ORDERED_QUEUE:
3229                 fcp_task_attr = MSG_ORDERED_TAG;
3230                 break;
3231         case ATIO_ACA_QUEUE:
3232                 fcp_task_attr = MSG_ACA_TAG;
3233                 break;
3234         case ATIO_UNTAGGED:
3235                 fcp_task_attr = MSG_SIMPLE_TAG;
3236                 break;
3237         default:
3238                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
3239                     "qla_target: unknown task code %x, use ORDERED instead\n",
3240                     task_codes);
3241                 fcp_task_attr = MSG_ORDERED_TAG;
3242                 break;
3243         }
3244
3245         return fcp_task_attr;
3246 }
3247
3248 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
3249                                         uint8_t *);
3250 /*
3251  * Process context for I/O path into tcm_qla2xxx code
3252  */
3253 static void __qlt_do_work(struct qla_tgt_cmd *cmd)
3254 {
3255         scsi_qla_host_t *vha = cmd->vha;
3256         struct qla_hw_data *ha = vha->hw;
3257         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3258         struct qla_tgt_sess *sess = cmd->sess;
3259         struct atio_from_isp *atio = &cmd->atio;
3260         unsigned char *cdb;
3261         unsigned long flags;
3262         uint32_t data_length;
3263         int ret, fcp_task_attr, data_dir, bidi = 0;
3264
3265         cmd->cmd_in_wq = 0;
3266         cmd->cmd_flags |= BIT_1;
3267         if (tgt->tgt_stop)
3268                 goto out_term;
3269
3270         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
3271         cmd->tag = atio->u.isp24.exchange_addr;
3272         cmd->unpacked_lun = scsilun_to_int(
3273             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
3274
3275         if (atio->u.isp24.fcp_cmnd.rddata &&
3276             atio->u.isp24.fcp_cmnd.wrdata) {
3277                 bidi = 1;
3278                 data_dir = DMA_TO_DEVICE;
3279         } else if (atio->u.isp24.fcp_cmnd.rddata)
3280                 data_dir = DMA_FROM_DEVICE;
3281         else if (atio->u.isp24.fcp_cmnd.wrdata)
3282                 data_dir = DMA_TO_DEVICE;
3283         else
3284                 data_dir = DMA_NONE;
3285
3286         fcp_task_attr = qlt_get_fcp_task_attr(vha,
3287             atio->u.isp24.fcp_cmnd.task_attr);
3288         data_length = be32_to_cpu(get_unaligned((uint32_t *)
3289             &atio->u.isp24.fcp_cmnd.add_cdb[
3290             atio->u.isp24.fcp_cmnd.add_cdb_len]));
3291
3292         ret = ha->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
3293                                           fcp_task_attr, data_dir, bidi);
3294         if (ret != 0)
3295                 goto out_term;
3296         /*
3297          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
3298          */
3299         spin_lock_irqsave(&ha->hardware_lock, flags);
3300         ha->tgt.tgt_ops->put_sess(sess);
3301         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3302         return;
3303
3304 out_term:
3305         ql_dbg(ql_dbg_io, vha, 0x3060, "Terminating work cmd %p", cmd);
3306         /*
3307          * cmd has not sent to target yet, so pass NULL as the second
3308          * argument to qlt_send_term_exchange() and free the memory here.
3309          */
3310         cmd->cmd_flags |= BIT_2;
3311         spin_lock_irqsave(&ha->hardware_lock, flags);
3312         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
3313
3314         qlt_decr_num_pend_cmds(vha);
3315         percpu_ida_free(&sess->se_sess->sess_tag_pool, cmd->se_cmd.map_tag);
3316         ha->tgt.tgt_ops->put_sess(sess);
3317         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3318 }
3319
3320 static void qlt_do_work(struct work_struct *work)
3321 {
3322         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
3323
3324         __qlt_do_work(cmd);
3325 }
3326
3327 static struct qla_tgt_cmd *qlt_get_tag(scsi_qla_host_t *vha,
3328                                        struct qla_tgt_sess *sess,
3329                                        struct atio_from_isp *atio)
3330 {
3331         struct se_session *se_sess = sess->se_sess;
3332         struct qla_tgt_cmd *cmd;
3333         int tag;
3334
3335         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
3336         if (tag < 0)
3337                 return NULL;
3338
3339         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
3340         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
3341
3342         memcpy(&cmd->atio, atio, sizeof(*atio));
3343         cmd->state = QLA_TGT_STATE_NEW;
3344         cmd->tgt = vha->vha_tgt.qla_tgt;
3345         qlt_incr_num_pend_cmds(vha);
3346         cmd->vha = vha;
3347         cmd->se_cmd.map_tag = tag;
3348         cmd->sess = sess;
3349         cmd->loop_id = sess->loop_id;
3350         cmd->conf_compl_supported = sess->conf_compl_supported;
3351
3352         return cmd;
3353 }
3354
3355 static void qlt_send_busy(struct scsi_qla_host *, struct atio_from_isp *,
3356                           uint16_t);
3357
3358 static void qlt_create_sess_from_atio(struct work_struct *work)
3359 {
3360         struct qla_tgt_sess_op *op = container_of(work,
3361                                         struct qla_tgt_sess_op, work);
3362         scsi_qla_host_t *vha = op->vha;
3363         struct qla_hw_data *ha = vha->hw;
3364         struct qla_tgt_sess *sess;
3365         struct qla_tgt_cmd *cmd;
3366         unsigned long flags;
3367         uint8_t *s_id = op->atio.u.isp24.fcp_hdr.s_id;
3368
3369         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
3370                 "qla_target(%d): Unable to find wwn login"
3371                 " (s_id %x:%x:%x), trying to create it manually\n",
3372                 vha->vp_idx, s_id[0], s_id[1], s_id[2]);
3373
3374         if (op->atio.u.raw.entry_count > 1) {
3375                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
3376                         "Dropping multy entry atio %p\n", &op->atio);
3377                 goto out_term;
3378         }
3379
3380         mutex_lock(&vha->vha_tgt.tgt_mutex);
3381         sess = qlt_make_local_sess(vha, s_id);
3382         /* sess has an extra creation ref. */
3383         mutex_unlock(&vha->vha_tgt.tgt_mutex);
3384
3385         if (!sess)
3386                 goto out_term;
3387         /*
3388          * Now obtain a pre-allocated session tag using the original op->atio
3389          * packet header, and dispatch into __qlt_do_work() using the existing
3390          * process context.
3391          */
3392         cmd = qlt_get_tag(vha, sess, &op->atio);
3393         if (!cmd) {
3394                 spin_lock_irqsave(&ha->hardware_lock, flags);
3395                 qlt_send_busy(vha, &op->atio, SAM_STAT_BUSY);
3396                 ha->tgt.tgt_ops->put_sess(sess);
3397                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3398                 kfree(op);
3399                 return;
3400         }
3401         /*
3402          * __qlt_do_work() will call ha->tgt.tgt_ops->put_sess() to release
3403          * the extra reference taken above by qlt_make_local_sess()
3404          */
3405         __qlt_do_work(cmd);
3406         kfree(op);
3407         return;
3408
3409 out_term:
3410         spin_lock_irqsave(&ha->hardware_lock, flags);
3411         qlt_send_term_exchange(vha, NULL, &op->atio, 1);
3412         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3413         kfree(op);
3414
3415 }
3416
3417 /* ha->hardware_lock supposed to be held on entry */
3418 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
3419         struct atio_from_isp *atio)
3420 {
3421         struct qla_hw_data *ha = vha->hw;
3422         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3423         struct qla_tgt_sess *sess;
3424         struct qla_tgt_cmd *cmd;
3425
3426         if (unlikely(tgt->tgt_stop)) {
3427                 ql_dbg(ql_dbg_io, vha, 0x3061,
3428                     "New command while device %p is shutting down\n", tgt);
3429                 return -EFAULT;
3430         }
3431
3432         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, atio->u.isp24.fcp_hdr.s_id);
3433         if (unlikely(!sess)) {
3434                 struct qla_tgt_sess_op *op = kzalloc(sizeof(struct qla_tgt_sess_op),
3435                                                      GFP_ATOMIC);
3436                 if (!op)
3437                         return -ENOMEM;
3438
3439                 memcpy(&op->atio, atio, sizeof(*atio));
3440                 op->vha = vha;
3441                 INIT_WORK(&op->work, qlt_create_sess_from_atio);
3442                 queue_work(qla_tgt_wq, &op->work);
3443                 return 0;
3444         }
3445         /*
3446          * Do kref_get() before returning + dropping qla_hw_data->hardware_lock.
3447          */
3448         kref_get(&sess->se_sess->sess_kref);
3449
3450         cmd = qlt_get_tag(vha, sess, atio);
3451         if (!cmd) {
3452                 ql_dbg(ql_dbg_io, vha, 0x3062,
3453                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
3454                 ha->tgt.tgt_ops->put_sess(sess);
3455                 return -ENOMEM;
3456         }
3457
3458         cmd->cmd_flags = 0;
3459         cmd->jiffies_at_alloc = get_jiffies_64();
3460
3461         cmd->reset_count = vha->hw->chip_reset;
3462
3463         cmd->cmd_in_wq = 1;
3464         cmd->cmd_flags |= BIT_0;
3465         INIT_WORK(&cmd->work, qlt_do_work);
3466         queue_work(qla_tgt_wq, &cmd->work);
3467         return 0;
3468
3469 }
3470
3471 /* ha->hardware_lock supposed to be held on entry */
3472 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
3473         int fn, void *iocb, int flags)
3474 {
3475         struct scsi_qla_host *vha = sess->vha;
3476         struct qla_hw_data *ha = vha->hw;
3477         struct qla_tgt_mgmt_cmd *mcmd;
3478         int res;
3479         uint8_t tmr_func;
3480
3481         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3482         if (!mcmd) {
3483                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
3484                     "qla_target(%d): Allocation of management "
3485                     "command failed, some commands and their data could "
3486                     "leak\n", vha->vp_idx);
3487                 return -ENOMEM;
3488         }
3489         memset(mcmd, 0, sizeof(*mcmd));
3490         mcmd->sess = sess;
3491
3492         if (iocb) {
3493                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3494                     sizeof(mcmd->orig_iocb.imm_ntfy));
3495         }
3496         mcmd->tmr_func = fn;
3497         mcmd->flags = flags;
3498         mcmd->reset_count = vha->hw->chip_reset;
3499
3500         switch (fn) {
3501         case QLA_TGT_CLEAR_ACA:
3502                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
3503                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
3504                 tmr_func = TMR_CLEAR_ACA;
3505                 break;
3506
3507         case QLA_TGT_TARGET_RESET:
3508                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
3509                     "qla_target(%d): TARGET_RESET received\n",
3510                     sess->vha->vp_idx);
3511                 tmr_func = TMR_TARGET_WARM_RESET;
3512                 break;
3513
3514         case QLA_TGT_LUN_RESET:
3515                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
3516                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
3517                 tmr_func = TMR_LUN_RESET;
3518                 break;
3519
3520         case QLA_TGT_CLEAR_TS:
3521                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
3522                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
3523                 tmr_func = TMR_CLEAR_TASK_SET;
3524                 break;
3525
3526         case QLA_TGT_ABORT_TS:
3527                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
3528                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
3529                 tmr_func = TMR_ABORT_TASK_SET;
3530                 break;
3531 #if 0
3532         case QLA_TGT_ABORT_ALL:
3533                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
3534                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
3535                     sess->vha->vp_idx);
3536                 tmr_func = 0;
3537                 break;
3538
3539         case QLA_TGT_ABORT_ALL_SESS:
3540                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
3541                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
3542                     sess->vha->vp_idx);
3543                 tmr_func = 0;
3544                 break;
3545
3546         case QLA_TGT_NEXUS_LOSS_SESS:
3547                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
3548                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
3549                     sess->vha->vp_idx);
3550                 tmr_func = 0;
3551                 break;
3552
3553         case QLA_TGT_NEXUS_LOSS:
3554                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
3555                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
3556                 tmr_func = 0;
3557                 break;
3558 #endif
3559         default:
3560                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
3561                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
3562                     sess->vha->vp_idx, fn);
3563                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3564                 return -ENOSYS;
3565         }
3566
3567         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
3568         if (res != 0) {
3569                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
3570                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
3571                     sess->vha->vp_idx, res);
3572                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3573                 return -EFAULT;
3574         }
3575
3576         return 0;
3577 }
3578
3579 /* ha->hardware_lock supposed to be held on entry */
3580 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
3581 {
3582         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3583         struct qla_hw_data *ha = vha->hw;
3584         struct qla_tgt *tgt;
3585         struct qla_tgt_sess *sess;
3586         uint32_t lun, unpacked_lun;
3587         int lun_size, fn;
3588
3589         tgt = vha->vha_tgt.qla_tgt;
3590
3591         lun = a->u.isp24.fcp_cmnd.lun;
3592         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
3593         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
3594         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3595             a->u.isp24.fcp_hdr.s_id);
3596         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3597
3598         if (!sess) {
3599                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
3600                     "qla_target(%d): task mgmt fn 0x%x for "
3601                     "non-existant session\n", vha->vp_idx, fn);
3602                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
3603                     sizeof(struct atio_from_isp));
3604         }
3605
3606         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
3607 }
3608
3609 /* ha->hardware_lock supposed to be held on entry */
3610 static int __qlt_abort_task(struct scsi_qla_host *vha,
3611         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
3612 {
3613         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
3614         struct qla_hw_data *ha = vha->hw;
3615         struct qla_tgt_mgmt_cmd *mcmd;
3616         uint32_t lun, unpacked_lun;
3617         int rc;
3618
3619         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
3620         if (mcmd == NULL) {
3621                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
3622                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
3623                     vha->vp_idx, __func__);
3624                 return -ENOMEM;
3625         }
3626         memset(mcmd, 0, sizeof(*mcmd));
3627
3628         mcmd->sess = sess;
3629         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
3630             sizeof(mcmd->orig_iocb.imm_ntfy));
3631
3632         lun = a->u.isp24.fcp_cmnd.lun;
3633         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
3634         mcmd->reset_count = vha->hw->chip_reset;
3635
3636         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
3637             le16_to_cpu(iocb->u.isp2x.seq_id));
3638         if (rc != 0) {
3639                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
3640                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
3641                     vha->vp_idx, rc);
3642                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
3643                 return -EFAULT;
3644         }
3645
3646         return 0;
3647 }
3648
3649 /* ha->hardware_lock supposed to be held on entry */
3650 static int qlt_abort_task(struct scsi_qla_host *vha,
3651         struct imm_ntfy_from_isp *iocb)
3652 {
3653         struct qla_hw_data *ha = vha->hw;
3654         struct qla_tgt_sess *sess;
3655         int loop_id;
3656
3657         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
3658
3659         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
3660         if (sess == NULL) {
3661                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
3662                     "qla_target(%d): task abort for unexisting "
3663                     "session\n", vha->vp_idx);
3664                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
3665                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
3666         }
3667
3668         return __qlt_abort_task(vha, iocb, sess);
3669 }
3670
3671 /*
3672  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3673  */
3674 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
3675         struct imm_ntfy_from_isp *iocb)
3676 {
3677         int res = 0;
3678
3679         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
3680             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
3681             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
3682
3683         switch (iocb->u.isp24.status_subcode) {
3684         case ELS_PLOGI:
3685         case ELS_FLOGI:
3686         case ELS_PRLI:
3687         case ELS_LOGO:
3688         case ELS_PRLO:
3689                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3690                 break;
3691         case ELS_PDISC:
3692         case ELS_ADISC:
3693         {
3694                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3695                 if (tgt->link_reinit_iocb_pending) {
3696                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3697                             0, 0, 0, 0, 0, 0);
3698                         tgt->link_reinit_iocb_pending = 0;
3699                 }
3700                 res = 1; /* send notify ack */
3701                 break;
3702         }
3703
3704         default:
3705                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3706                     "qla_target(%d): Unsupported ELS command %x "
3707                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3708                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3709                 break;
3710         }
3711
3712         return res;
3713 }
3714
3715 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3716 {
3717         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3718         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3719         int i, sg_srr_cnt, bufflen = 0;
3720
3721         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3722             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3723             "cmd->sg_cnt: %u, direction: %d\n",
3724             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3725
3726         /*
3727          * FIXME: Reject non zero SRR relative offset until we can test
3728          * this code properly.
3729          */
3730         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3731         return -1;
3732
3733         if (!cmd->sg || !cmd->sg_cnt) {
3734                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3735                     "Missing cmd->sg or zero cmd->sg_cnt in"
3736                     " qla_tgt_set_data_offset\n");
3737                 return -EINVAL;
3738         }
3739         /*
3740          * Walk the current cmd->sg list until we locate the new sg_srr_start
3741          */
3742         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3743                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3744                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3745                     i, sg, sg_page(sg), sg->length, sg->offset);
3746
3747                 if ((sg->length + tmp) > offset) {
3748                         first_offset = rem_offset;
3749                         sg_srr_start = sg;
3750                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3751                             "Found matching sg[%d], using %p as sg_srr_start, "
3752                             "and using first_offset: %zu\n", i, sg,
3753                             first_offset);
3754                         break;
3755                 }
3756                 tmp += sg->length;
3757                 rem_offset -= sg->length;
3758         }
3759
3760         if (!sg_srr_start) {
3761                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3762                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3763                 return -EINVAL;
3764         }
3765         sg_srr_cnt = (cmd->sg_cnt - i);
3766
3767         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3768         if (!sg_srr) {
3769                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3770                     "Unable to allocate sgp\n");
3771                 return -ENOMEM;
3772         }
3773         sg_init_table(sg_srr, sg_srr_cnt);
3774         sgp = &sg_srr[0];
3775         /*
3776          * Walk the remaining list for sg_srr_start, mapping to the newly
3777          * allocated sg_srr taking first_offset into account.
3778          */
3779         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3780                 if (first_offset) {
3781                         sg_set_page(sgp, sg_page(sg),
3782                             (sg->length - first_offset), first_offset);
3783                         first_offset = 0;
3784                 } else {
3785                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3786                 }
3787                 bufflen += sgp->length;
3788
3789                 sgp = sg_next(sgp);
3790                 if (!sgp)
3791                         break;
3792         }
3793
3794         cmd->sg = sg_srr;
3795         cmd->sg_cnt = sg_srr_cnt;
3796         cmd->bufflen = bufflen;
3797         cmd->offset += offset;
3798         cmd->free_sg = 1;
3799
3800         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3801         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3802             cmd->sg_cnt);
3803         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3804             cmd->bufflen);
3805         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3806             cmd->offset);
3807
3808         if (cmd->sg_cnt < 0)
3809                 BUG();
3810
3811         if (cmd->bufflen < 0)
3812                 BUG();
3813
3814         return 0;
3815 }
3816
3817 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3818         uint32_t srr_rel_offs, int *xmit_type)
3819 {
3820         int res = 0, rel_offs;
3821
3822         rel_offs = srr_rel_offs - cmd->offset;
3823         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3824             srr_rel_offs, rel_offs);
3825
3826         *xmit_type = QLA_TGT_XMIT_ALL;
3827
3828         if (rel_offs < 0) {
3829                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3830                     "qla_target(%d): SRR rel_offs (%d) < 0",
3831                     cmd->vha->vp_idx, rel_offs);
3832                 res = -1;
3833         } else if (rel_offs == cmd->bufflen)
3834                 *xmit_type = QLA_TGT_XMIT_STATUS;
3835         else if (rel_offs > 0)
3836                 res = qlt_set_data_offset(cmd, rel_offs);
3837
3838         return res;
3839 }
3840
3841 /* No locks, thread context */
3842 static void qlt_handle_srr(struct scsi_qla_host *vha,
3843         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3844 {
3845         struct imm_ntfy_from_isp *ntfy =
3846             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3847         struct qla_hw_data *ha = vha->hw;
3848         struct qla_tgt_cmd *cmd = sctio->cmd;
3849         struct se_cmd *se_cmd = &cmd->se_cmd;
3850         unsigned long flags;
3851         int xmit_type = 0, resp = 0;
3852         uint32_t offset;
3853         uint16_t srr_ui;
3854
3855         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3856         srr_ui = ntfy->u.isp24.srr_ui;
3857
3858         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3859             cmd, srr_ui);
3860
3861         switch (srr_ui) {
3862         case SRR_IU_STATUS:
3863                 spin_lock_irqsave(&ha->hardware_lock, flags);
3864                 qlt_send_notify_ack(vha, ntfy,
3865                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3866                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3867                 xmit_type = QLA_TGT_XMIT_STATUS;
3868                 resp = 1;
3869                 break;
3870         case SRR_IU_DATA_IN:
3871                 if (!cmd->sg || !cmd->sg_cnt) {
3872                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3873                             "Unable to process SRR_IU_DATA_IN due to"
3874                             " missing cmd->sg, state: %d\n", cmd->state);
3875                         dump_stack();
3876                         goto out_reject;
3877                 }
3878                 if (se_cmd->scsi_status != 0) {
3879                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3880                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3881                             "scsi_status\n");
3882                         goto out_reject;
3883                 }
3884                 cmd->bufflen = se_cmd->data_length;
3885
3886                 if (qlt_has_data(cmd)) {
3887                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3888                                 goto out_reject;
3889                         spin_lock_irqsave(&ha->hardware_lock, flags);
3890                         qlt_send_notify_ack(vha, ntfy,
3891                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3892                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3893                         resp = 1;
3894                 } else {
3895                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3896                             "qla_target(%d): SRR for in data for cmd "
3897                             "without them (tag %d, SCSI status %d), "
3898                             "reject", vha->vp_idx, cmd->tag,
3899                             cmd->se_cmd.scsi_status);
3900                         goto out_reject;
3901                 }
3902                 break;
3903         case SRR_IU_DATA_OUT:
3904                 if (!cmd->sg || !cmd->sg_cnt) {
3905                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3906                             "Unable to process SRR_IU_DATA_OUT due to"
3907                             " missing cmd->sg\n");
3908                         dump_stack();
3909                         goto out_reject;
3910                 }
3911                 if (se_cmd->scsi_status != 0) {
3912                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3913                             "Rejecting SRR_IU_DATA_OUT"
3914                             " with non GOOD scsi_status\n");
3915                         goto out_reject;
3916                 }
3917                 cmd->bufflen = se_cmd->data_length;
3918
3919                 if (qlt_has_data(cmd)) {
3920                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3921                                 goto out_reject;
3922                         spin_lock_irqsave(&ha->hardware_lock, flags);
3923                         qlt_send_notify_ack(vha, ntfy,
3924                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3925                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3926                         if (xmit_type & QLA_TGT_XMIT_DATA) {
3927                                 cmd->cmd_flags |= BIT_8;
3928                                 qlt_rdy_to_xfer(cmd);
3929                         }
3930                 } else {
3931                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3932                             "qla_target(%d): SRR for out data for cmd "
3933                             "without them (tag %d, SCSI status %d), "
3934                             "reject", vha->vp_idx, cmd->tag,
3935                             cmd->se_cmd.scsi_status);
3936                         goto out_reject;
3937                 }
3938                 break;
3939         default:
3940                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3941                     "qla_target(%d): Unknown srr_ui value %x",
3942                     vha->vp_idx, srr_ui);
3943                 goto out_reject;
3944         }
3945
3946         /* Transmit response in case of status and data-in cases */
3947         if (resp) {
3948                 cmd->cmd_flags |= BIT_7;
3949                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3950         }
3951
3952         return;
3953
3954 out_reject:
3955         spin_lock_irqsave(&ha->hardware_lock, flags);
3956         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3957             NOTIFY_ACK_SRR_FLAGS_REJECT,
3958             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3959             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3960         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3961                 cmd->state = QLA_TGT_STATE_DATA_IN;
3962                 dump_stack();
3963         } else {
3964                 cmd->cmd_flags |= BIT_9;
3965                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3966         }
3967         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3968 }
3969
3970 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3971         struct qla_tgt_srr_imm *imm, int ha_locked)
3972 {
3973         struct qla_hw_data *ha = vha->hw;
3974         unsigned long flags = 0;
3975
3976         if (!ha_locked)
3977                 spin_lock_irqsave(&ha->hardware_lock, flags);
3978
3979         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3980             NOTIFY_ACK_SRR_FLAGS_REJECT,
3981             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3982             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3983
3984         if (!ha_locked)
3985                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3986
3987         kfree(imm);
3988 }
3989
3990 static void qlt_handle_srr_work(struct work_struct *work)
3991 {
3992         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3993         struct scsi_qla_host *vha = tgt->vha;
3994         struct qla_tgt_srr_ctio *sctio;
3995         unsigned long flags;
3996
3997         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3998             tgt);
3999
4000 restart:
4001         spin_lock_irqsave(&tgt->srr_lock, flags);
4002         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
4003                 struct qla_tgt_srr_imm *imm, *i, *ti;
4004                 struct qla_tgt_cmd *cmd;
4005                 struct se_cmd *se_cmd;
4006
4007                 imm = NULL;
4008                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
4009                                                 srr_list_entry) {
4010                         if (i->srr_id == sctio->srr_id) {
4011                                 list_del(&i->srr_list_entry);
4012                                 if (imm) {
4013                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
4014                                           "qla_target(%d): There must be "
4015                                           "only one IMM SRR per CTIO SRR "
4016                                           "(IMM SRR %p, id %d, CTIO %p\n",
4017                                           vha->vp_idx, i, i->srr_id, sctio);
4018                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
4019                                 } else
4020                                         imm = i;
4021                         }
4022                 }
4023
4024                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
4025                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
4026                     sctio->srr_id);
4027
4028                 if (imm == NULL) {
4029                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
4030                             "Not found matching IMM for SRR CTIO (id %d)\n",
4031                             sctio->srr_id);
4032                         continue;
4033                 } else
4034                         list_del(&sctio->srr_list_entry);
4035
4036                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
4037
4038                 cmd = sctio->cmd;
4039                 /*
4040                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
4041                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
4042                  * logic..
4043                  */
4044                 cmd->offset = 0;
4045                 if (cmd->free_sg) {
4046                         kfree(cmd->sg);
4047                         cmd->sg = NULL;
4048                         cmd->free_sg = 0;
4049                 }
4050                 se_cmd = &cmd->se_cmd;
4051
4052                 cmd->sg_cnt = se_cmd->t_data_nents;
4053                 cmd->sg = se_cmd->t_data_sg;
4054
4055                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
4056                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
4057                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
4058                     se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
4059                     cmd->sg_cnt, cmd->offset);
4060
4061                 qlt_handle_srr(vha, sctio, imm);
4062
4063                 kfree(imm);
4064                 kfree(sctio);
4065                 goto restart;
4066         }
4067         spin_unlock_irqrestore(&tgt->srr_lock, flags);
4068 }
4069
4070 /* ha->hardware_lock supposed to be held on entry */
4071 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
4072         struct imm_ntfy_from_isp *iocb)
4073 {
4074         struct qla_tgt_srr_imm *imm;
4075         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4076         struct qla_tgt_srr_ctio *sctio;
4077
4078         tgt->imm_srr_id++;
4079
4080         ql_log(ql_log_warn, vha, 0xf02d, "qla_target(%d): SRR received\n",
4081             vha->vp_idx);
4082
4083         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
4084         if (imm != NULL) {
4085                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
4086
4087                 /* IRQ is already OFF */
4088                 spin_lock(&tgt->srr_lock);
4089                 imm->srr_id = tgt->imm_srr_id;
4090                 list_add_tail(&imm->srr_list_entry,
4091                     &tgt->srr_imm_list);
4092                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
4093                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
4094                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
4095                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
4096                         int found = 0;
4097                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
4098                             srr_list_entry) {
4099                                 if (sctio->srr_id == imm->srr_id) {
4100                                         found = 1;
4101                                         break;
4102                                 }
4103                         }
4104                         if (found) {
4105                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
4106                                     "Scheduling srr work\n");
4107                                 schedule_work(&tgt->srr_work);
4108                         } else {
4109                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
4110                                     "qla_target(%d): imm_srr_id "
4111                                     "== ctio_srr_id (%d), but there is no "
4112                                     "corresponding SRR CTIO, deleting IMM "
4113                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
4114                                     imm);
4115                                 list_del(&imm->srr_list_entry);
4116
4117                                 kfree(imm);
4118
4119                                 spin_unlock(&tgt->srr_lock);
4120                                 goto out_reject;
4121                         }
4122                 }
4123                 spin_unlock(&tgt->srr_lock);
4124         } else {
4125                 struct qla_tgt_srr_ctio *ts;
4126
4127                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
4128                     "qla_target(%d): Unable to allocate SRR IMM "
4129                     "entry, SRR request will be rejected\n", vha->vp_idx);
4130
4131                 /* IRQ is already OFF */
4132                 spin_lock(&tgt->srr_lock);
4133                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
4134                     srr_list_entry) {
4135                         if (sctio->srr_id == tgt->imm_srr_id) {
4136                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
4137                                     "CTIO SRR %p deleted (id %d)\n",
4138                                     sctio, sctio->srr_id);
4139                                 list_del(&sctio->srr_list_entry);
4140                                 qlt_send_term_exchange(vha, sctio->cmd,
4141                                     &sctio->cmd->atio, 1);
4142                                 kfree(sctio);
4143                         }
4144                 }
4145                 spin_unlock(&tgt->srr_lock);
4146                 goto out_reject;
4147         }
4148
4149         return;
4150
4151 out_reject:
4152         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
4153             NOTIFY_ACK_SRR_FLAGS_REJECT,
4154             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
4155             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
4156 }
4157
4158 /*
4159  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4160  */
4161 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
4162         struct imm_ntfy_from_isp *iocb)
4163 {
4164         struct qla_hw_data *ha = vha->hw;
4165         uint32_t add_flags = 0;
4166         int send_notify_ack = 1;
4167         uint16_t status;
4168
4169         status = le16_to_cpu(iocb->u.isp2x.status);
4170         switch (status) {
4171         case IMM_NTFY_LIP_RESET:
4172         {
4173                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
4174                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
4175                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
4176                     iocb->u.isp24.status_subcode);
4177
4178                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4179                         send_notify_ack = 0;
4180                 break;
4181         }
4182
4183         case IMM_NTFY_LIP_LINK_REINIT:
4184         {
4185                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4186                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
4187                     "qla_target(%d): LINK REINIT (loop %#x, "
4188                     "subcode %x)\n", vha->vp_idx,
4189                     le16_to_cpu(iocb->u.isp24.nport_handle),
4190                     iocb->u.isp24.status_subcode);
4191                 if (tgt->link_reinit_iocb_pending) {
4192                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
4193                             0, 0, 0, 0, 0, 0);
4194                 }
4195                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
4196                 tgt->link_reinit_iocb_pending = 1;
4197                 /*
4198                  * QLogic requires to wait after LINK REINIT for possible
4199                  * PDISC or ADISC ELS commands
4200                  */
4201                 send_notify_ack = 0;
4202                 break;
4203         }
4204
4205         case IMM_NTFY_PORT_LOGOUT:
4206                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
4207                     "qla_target(%d): Port logout (loop "
4208                     "%#x, subcode %x)\n", vha->vp_idx,
4209                     le16_to_cpu(iocb->u.isp24.nport_handle),
4210                     iocb->u.isp24.status_subcode);
4211
4212                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
4213                         send_notify_ack = 0;
4214                 /* The sessions will be cleared in the callback, if needed */
4215                 break;
4216
4217         case IMM_NTFY_GLBL_TPRLO:
4218                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
4219                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
4220                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4221                         send_notify_ack = 0;
4222                 /* The sessions will be cleared in the callback, if needed */
4223                 break;
4224
4225         case IMM_NTFY_PORT_CONFIG:
4226                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
4227                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
4228                     status);
4229                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
4230                         send_notify_ack = 0;
4231                 /* The sessions will be cleared in the callback, if needed */
4232                 break;
4233
4234         case IMM_NTFY_GLBL_LOGO:
4235                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
4236                     "qla_target(%d): Link failure detected\n",
4237                     vha->vp_idx);
4238                 /* I_T nexus loss */
4239                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
4240                         send_notify_ack = 0;
4241                 break;
4242
4243         case IMM_NTFY_IOCB_OVERFLOW:
4244                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
4245                     "qla_target(%d): Cannot provide requested "
4246                     "capability (IOCB overflowed the immediate notify "
4247                     "resource count)\n", vha->vp_idx);
4248                 break;
4249
4250         case IMM_NTFY_ABORT_TASK:
4251                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
4252                     "qla_target(%d): Abort Task (S %08x I %#x -> "
4253                     "L %#x)\n", vha->vp_idx,
4254                     le16_to_cpu(iocb->u.isp2x.seq_id),
4255                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
4256                     le16_to_cpu(iocb->u.isp2x.lun));
4257                 if (qlt_abort_task(vha, iocb) == 0)
4258                         send_notify_ack = 0;
4259                 break;
4260
4261         case IMM_NTFY_RESOURCE:
4262                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
4263                     "qla_target(%d): Out of resources, host %ld\n",
4264                     vha->vp_idx, vha->host_no);
4265                 break;
4266
4267         case IMM_NTFY_MSG_RX:
4268                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
4269                     "qla_target(%d): Immediate notify task %x\n",
4270                     vha->vp_idx, iocb->u.isp2x.task_flags);
4271                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
4272                         send_notify_ack = 0;
4273                 break;
4274
4275         case IMM_NTFY_ELS:
4276                 if (qlt_24xx_handle_els(vha, iocb) == 0)
4277                         send_notify_ack = 0;
4278                 break;
4279
4280         case IMM_NTFY_SRR:
4281                 qlt_prepare_srr_imm(vha, iocb);
4282                 send_notify_ack = 0;
4283                 break;
4284
4285         default:
4286                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
4287                     "qla_target(%d): Received unknown immediate "
4288                     "notify status %x\n", vha->vp_idx, status);
4289                 break;
4290         }
4291
4292         if (send_notify_ack)
4293                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
4294 }
4295
4296 /*
4297  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4298  * This function sends busy to ISP 2xxx or 24xx.
4299  */
4300 static int __qlt_send_busy(struct scsi_qla_host *vha,
4301         struct atio_from_isp *atio, uint16_t status)
4302 {
4303         struct ctio7_to_24xx *ctio24;
4304         struct qla_hw_data *ha = vha->hw;
4305         request_t *pkt;
4306         struct qla_tgt_sess *sess = NULL;
4307
4308         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4309             atio->u.isp24.fcp_hdr.s_id);
4310         if (!sess) {
4311                 qlt_send_term_exchange(vha, NULL, atio, 1);
4312                 return 0;
4313         }
4314         /* Sending marker isn't necessary, since we called from ISR */
4315
4316         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
4317         if (!pkt) {
4318                 ql_dbg(ql_dbg_io, vha, 0x3063,
4319                     "qla_target(%d): %s failed: unable to allocate "
4320                     "request packet", vha->vp_idx, __func__);
4321                 return -ENOMEM;
4322         }
4323
4324         pkt->entry_count = 1;
4325         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
4326
4327         ctio24 = (struct ctio7_to_24xx *)pkt;
4328         ctio24->entry_type = CTIO_TYPE7;
4329         ctio24->nport_handle = sess->loop_id;
4330         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
4331         ctio24->vp_index = vha->vp_idx;
4332         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
4333         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
4334         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
4335         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
4336         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
4337             __constant_cpu_to_le16(
4338                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
4339                 CTIO7_FLAGS_DONT_RET_CTIO);
4340         /*
4341          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
4342          * if the explicit conformation is used.
4343          */
4344         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
4345         ctio24->u.status1.scsi_status = cpu_to_le16(status);
4346         /* Memory Barrier */
4347         wmb();
4348         qla2x00_start_iocbs(vha, vha->req);
4349         return 0;
4350 }
4351
4352 /*
4353  * This routine is used to allocate a command for either a QFull condition
4354  * (ie reply SAM_STAT_BUSY) or to terminate an exchange that did not go
4355  * out previously.
4356  */
4357 static void
4358 qlt_alloc_qfull_cmd(struct scsi_qla_host *vha,
4359         struct atio_from_isp *atio, uint16_t status, int qfull)
4360 {
4361         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4362         struct qla_hw_data *ha = vha->hw;
4363         struct qla_tgt_sess *sess;
4364         struct se_session *se_sess;
4365         struct qla_tgt_cmd *cmd;
4366         int tag;
4367
4368         if (unlikely(tgt->tgt_stop)) {
4369                 ql_dbg(ql_dbg_io, vha, 0x300a,
4370                         "New command while device %p is shutting down\n", tgt);
4371                 return;
4372         }
4373
4374         if ((vha->hw->tgt.num_qfull_cmds_alloc + 1) > MAX_QFULL_CMDS_ALLOC) {
4375                 vha->hw->tgt.num_qfull_cmds_dropped++;
4376                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4377                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4378                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4379                                 vha->hw->tgt.num_qfull_cmds_dropped;
4380
4381                 ql_dbg(ql_dbg_io, vha, 0x3068,
4382                         "qla_target(%d): %s: QFull CMD dropped[%d]\n",
4383                         vha->vp_idx, __func__,
4384                         vha->hw->tgt.num_qfull_cmds_dropped);
4385
4386                 qlt_chk_exch_leak_thresh_hold(vha);
4387                 return;
4388         }
4389
4390         sess = ha->tgt.tgt_ops->find_sess_by_s_id
4391                 (vha, atio->u.isp24.fcp_hdr.s_id);
4392         if (!sess)
4393                 return;
4394
4395         se_sess = sess->se_sess;
4396
4397         tag = percpu_ida_alloc(&se_sess->sess_tag_pool, TASK_RUNNING);
4398         if (tag < 0)
4399                 return;
4400
4401         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
4402         if (!cmd) {
4403                 ql_dbg(ql_dbg_io, vha, 0x3009,
4404                         "qla_target(%d): %s: Allocation of cmd failed\n",
4405                         vha->vp_idx, __func__);
4406
4407                 vha->hw->tgt.num_qfull_cmds_dropped++;
4408                 if (vha->hw->tgt.num_qfull_cmds_dropped >
4409                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped)
4410                         vha->hw->qla_stats.stat_max_qfull_cmds_dropped =
4411                                 vha->hw->tgt.num_qfull_cmds_dropped;
4412
4413                 qlt_chk_exch_leak_thresh_hold(vha);
4414                 return;
4415         }
4416
4417         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
4418
4419         qlt_incr_num_pend_cmds(vha);
4420         INIT_LIST_HEAD(&cmd->cmd_list);
4421         memcpy(&cmd->atio, atio, sizeof(*atio));
4422
4423         cmd->tgt = vha->vha_tgt.qla_tgt;
4424         cmd->vha = vha;
4425         cmd->reset_count = vha->hw->chip_reset;
4426         cmd->q_full = 1;
4427
4428         if (qfull) {
4429                 cmd->q_full = 1;
4430                 /* NOTE: borrowing the state field to carry the status */
4431                 cmd->state = status;
4432         } else
4433                 cmd->term_exchg = 1;
4434
4435         list_add_tail(&cmd->cmd_list, &vha->hw->tgt.q_full_list);
4436
4437         vha->hw->tgt.num_qfull_cmds_alloc++;
4438         if (vha->hw->tgt.num_qfull_cmds_alloc >
4439                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc)
4440                 vha->hw->qla_stats.stat_max_qfull_cmds_alloc =
4441                         vha->hw->tgt.num_qfull_cmds_alloc;
4442 }
4443
4444 int
4445 qlt_free_qfull_cmds(struct scsi_qla_host *vha)
4446 {
4447         struct qla_hw_data *ha = vha->hw;
4448         unsigned long flags;
4449         struct qla_tgt_cmd *cmd, *tcmd;
4450         struct list_head free_list;
4451         int rc = 0;
4452
4453         if (list_empty(&ha->tgt.q_full_list))
4454                 return 0;
4455
4456         INIT_LIST_HEAD(&free_list);
4457
4458         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
4459
4460         if (list_empty(&ha->tgt.q_full_list)) {
4461                 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4462                 return 0;
4463         }
4464
4465         list_for_each_entry_safe(cmd, tcmd, &ha->tgt.q_full_list, cmd_list) {
4466                 if (cmd->q_full)
4467                         /* cmd->state is a borrowed field to hold status */
4468                         rc = __qlt_send_busy(vha, &cmd->atio, cmd->state);
4469                 else if (cmd->term_exchg)
4470                         rc = __qlt_send_term_exchange(vha, NULL, &cmd->atio);
4471
4472                 if (rc == -ENOMEM)
4473                         break;
4474
4475                 if (cmd->q_full)
4476                         ql_dbg(ql_dbg_io, vha, 0x3006,
4477                             "%s: busy sent for ox_id[%04x]\n", __func__,
4478                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4479                 else if (cmd->term_exchg)
4480                         ql_dbg(ql_dbg_io, vha, 0x3007,
4481                             "%s: Term exchg sent for ox_id[%04x]\n", __func__,
4482                             be16_to_cpu(cmd->atio.u.isp24.fcp_hdr.ox_id));
4483                 else
4484                         ql_dbg(ql_dbg_io, vha, 0x3008,
4485                             "%s: Unexpected cmd in QFull list %p\n", __func__,
4486                             cmd);
4487
4488                 list_del(&cmd->cmd_list);
4489                 list_add_tail(&cmd->cmd_list, &free_list);
4490
4491                 /* piggy back on hardware_lock for protection */
4492                 vha->hw->tgt.num_qfull_cmds_alloc--;
4493         }
4494         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
4495
4496         cmd = NULL;
4497
4498         list_for_each_entry_safe(cmd, tcmd, &free_list, cmd_list) {
4499                 list_del(&cmd->cmd_list);
4500                 /* This cmd was never sent to TCM.  There is no need
4501                  * to schedule free or call free_cmd
4502                  */
4503                 qlt_free_cmd(cmd);
4504         }
4505         return rc;
4506 }
4507
4508 static void
4509 qlt_send_busy(struct scsi_qla_host *vha,
4510         struct atio_from_isp *atio, uint16_t status)
4511 {
4512         int rc = 0;
4513
4514         rc = __qlt_send_busy(vha, atio, status);
4515         if (rc == -ENOMEM)
4516                 qlt_alloc_qfull_cmd(vha, atio, status, 1);
4517 }
4518
4519 static int
4520 qlt_chk_qfull_thresh_hold(struct scsi_qla_host *vha,
4521         struct atio_from_isp *atio)
4522 {
4523         struct qla_hw_data *ha = vha->hw;
4524         uint16_t status;
4525
4526         if (ha->tgt.num_pend_cmds < Q_FULL_THRESH_HOLD(ha))
4527                 return 0;
4528
4529         status = temp_sam_status;
4530         qlt_send_busy(vha, atio, status);
4531         return 1;
4532 }
4533
4534 /* ha->hardware_lock supposed to be held on entry */
4535 /* called via callback from qla2xxx */
4536 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
4537         struct atio_from_isp *atio)
4538 {
4539         struct qla_hw_data *ha = vha->hw;
4540         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4541         int rc;
4542
4543         if (unlikely(tgt == NULL)) {
4544                 ql_dbg(ql_dbg_io, vha, 0x3064,
4545                     "ATIO pkt, but no tgt (ha %p)", ha);
4546                 return;
4547         }
4548         /*
4549          * In tgt_stop mode we also should allow all requests to pass.
4550          * Otherwise, some commands can stuck.
4551          */
4552
4553         tgt->irq_cmd_count++;
4554
4555         switch (atio->u.raw.entry_type) {
4556         case ATIO_TYPE7:
4557                 if (unlikely(atio->u.isp24.exchange_addr ==
4558                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
4559                         ql_dbg(ql_dbg_io, vha, 0x3065,
4560                             "qla_target(%d): ATIO_TYPE7 "
4561                             "received with UNKNOWN exchange address, "
4562                             "sending QUEUE_FULL\n", vha->vp_idx);
4563                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
4564                         break;
4565                 }
4566
4567
4568
4569                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0)) {
4570                         rc = qlt_chk_qfull_thresh_hold(vha, atio);
4571                         if (rc != 0) {
4572                                 tgt->irq_cmd_count--;
4573                                 return;
4574                         }
4575                         rc = qlt_handle_cmd_for_atio(vha, atio);
4576                 } else {
4577                         rc = qlt_handle_task_mgmt(vha, atio);
4578                 }
4579                 if (unlikely(rc != 0)) {
4580                         if (rc == -ESRCH) {
4581 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4582                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4583 #else
4584                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4585 #endif
4586                         } else {
4587                                 if (tgt->tgt_stop) {
4588                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
4589                                             "qla_target: Unable to send "
4590                                             "command to target for req, "
4591                                             "ignoring.\n");
4592                                 } else {
4593                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
4594                                             "qla_target(%d): Unable to send "
4595                                             "command to target, sending BUSY "
4596                                             "status.\n", vha->vp_idx);
4597                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
4598                                 }
4599                         }
4600                 }
4601                 break;
4602
4603         case IMMED_NOTIFY_TYPE:
4604         {
4605                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
4606                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
4607                             "qla_target(%d): Received ATIO packet %x "
4608                             "with error status %x\n", vha->vp_idx,
4609                             atio->u.raw.entry_type,
4610                             atio->u.isp2x.entry_status);
4611                         break;
4612                 }
4613                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
4614                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
4615                 break;
4616         }
4617
4618         default:
4619                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
4620                     "qla_target(%d): Received unknown ATIO atio "
4621                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
4622                 break;
4623         }
4624
4625         tgt->irq_cmd_count--;
4626 }
4627
4628 /* ha->hardware_lock supposed to be held on entry */
4629 /* called via callback from qla2xxx */
4630 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
4631 {
4632         struct qla_hw_data *ha = vha->hw;
4633         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4634
4635         if (unlikely(tgt == NULL)) {
4636                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
4637                     "qla_target(%d): Response pkt %x received, but no "
4638                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
4639                 return;
4640         }
4641
4642         /*
4643          * In tgt_stop mode we also should allow all requests to pass.
4644          * Otherwise, some commands can stuck.
4645          */
4646
4647         tgt->irq_cmd_count++;
4648
4649         switch (pkt->entry_type) {
4650         case CTIO_CRC2:
4651         case CTIO_TYPE7:
4652         {
4653                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
4654                 qlt_do_ctio_completion(vha, entry->handle,
4655                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4656                     entry);
4657                 break;
4658         }
4659
4660         case ACCEPT_TGT_IO_TYPE:
4661         {
4662                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
4663                 int rc;
4664                 if (atio->u.isp2x.status !=
4665                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
4666                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
4667                             "qla_target(%d): ATIO with error "
4668                             "status %x received\n", vha->vp_idx,
4669                             le16_to_cpu(atio->u.isp2x.status));
4670                         break;
4671                 }
4672
4673                 rc = qlt_chk_qfull_thresh_hold(vha, atio);
4674                 if (rc != 0) {
4675                         tgt->irq_cmd_count--;
4676                         return;
4677                 }
4678
4679                 rc = qlt_handle_cmd_for_atio(vha, atio);
4680                 if (unlikely(rc != 0)) {
4681                         if (rc == -ESRCH) {
4682 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
4683                                 qlt_send_busy(vha, atio, 0);
4684 #else
4685                                 qlt_send_term_exchange(vha, NULL, atio, 1);
4686 #endif
4687                         } else {
4688                                 if (tgt->tgt_stop) {
4689                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
4690                                             "qla_target: Unable to send "
4691                                             "command to target, sending TERM "
4692                                             "EXCHANGE for rsp\n");
4693                                         qlt_send_term_exchange(vha, NULL,
4694                                             atio, 1);
4695                                 } else {
4696                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
4697                                             "qla_target(%d): Unable to send "
4698                                             "command to target, sending BUSY "
4699                                             "status\n", vha->vp_idx);
4700                                         qlt_send_busy(vha, atio, 0);
4701                                 }
4702                         }
4703                 }
4704         }
4705         break;
4706
4707         case CONTINUE_TGT_IO_TYPE:
4708         {
4709                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4710                 qlt_do_ctio_completion(vha, entry->handle,
4711                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4712                     entry);
4713                 break;
4714         }
4715
4716         case CTIO_A64_TYPE:
4717         {
4718                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
4719                 qlt_do_ctio_completion(vha, entry->handle,
4720                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
4721                     entry);
4722                 break;
4723         }
4724
4725         case IMMED_NOTIFY_TYPE:
4726                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
4727                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
4728                 break;
4729
4730         case NOTIFY_ACK_TYPE:
4731                 if (tgt->notify_ack_expected > 0) {
4732                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
4733                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
4734                             "NOTIFY_ACK seq %08x status %x\n",
4735                             le16_to_cpu(entry->u.isp2x.seq_id),
4736                             le16_to_cpu(entry->u.isp2x.status));
4737                         tgt->notify_ack_expected--;
4738                         if (entry->u.isp2x.status !=
4739                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
4740                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
4741                                     "qla_target(%d): NOTIFY_ACK "
4742                                     "failed %x\n", vha->vp_idx,
4743                                     le16_to_cpu(entry->u.isp2x.status));
4744                         }
4745                 } else {
4746                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
4747                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
4748                             vha->vp_idx);
4749                 }
4750                 break;
4751
4752         case ABTS_RECV_24XX:
4753                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
4754                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
4755                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
4756                 break;
4757
4758         case ABTS_RESP_24XX:
4759                 if (tgt->abts_resp_expected > 0) {
4760                         struct abts_resp_from_24xx_fw *entry =
4761                                 (struct abts_resp_from_24xx_fw *)pkt;
4762                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
4763                             "ABTS_RESP_24XX: compl_status %x\n",
4764                             entry->compl_status);
4765                         tgt->abts_resp_expected--;
4766                         if (le16_to_cpu(entry->compl_status) !=
4767                             ABTS_RESP_COMPL_SUCCESS) {
4768                                 if ((entry->error_subcode1 == 0x1E) &&
4769                                     (entry->error_subcode2 == 0)) {
4770                                         /*
4771                                          * We've got a race here: aborted
4772                                          * exchange not terminated, i.e.
4773                                          * response for the aborted command was
4774                                          * sent between the abort request was
4775                                          * received and processed.
4776                                          * Unfortunately, the firmware has a
4777                                          * silly requirement that all aborted
4778                                          * exchanges must be explicitely
4779                                          * terminated, otherwise it refuses to
4780                                          * send responses for the abort
4781                                          * requests. So, we have to
4782                                          * (re)terminate the exchange and retry
4783                                          * the abort response.
4784                                          */
4785                                         qlt_24xx_retry_term_exchange(vha,
4786                                             entry);
4787                                 } else
4788                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
4789                                             "qla_target(%d): ABTS_RESP_24XX "
4790                                             "failed %x (subcode %x:%x)",
4791                                             vha->vp_idx, entry->compl_status,
4792                                             entry->error_subcode1,
4793                                             entry->error_subcode2);
4794                         }
4795                 } else {
4796                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
4797                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
4798                             "received\n", vha->vp_idx);
4799                 }
4800                 break;
4801
4802         default:
4803                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
4804                     "qla_target(%d): Received unknown response pkt "
4805                     "type %x\n", vha->vp_idx, pkt->entry_type);
4806                 break;
4807         }
4808
4809         tgt->irq_cmd_count--;
4810 }
4811
4812 /*
4813  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
4814  */
4815 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
4816         uint16_t *mailbox)
4817 {
4818         struct qla_hw_data *ha = vha->hw;
4819         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4820         int login_code;
4821
4822         if (!ha->tgt.tgt_ops)
4823                 return;
4824
4825         if (unlikely(tgt == NULL)) {
4826                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
4827                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
4828                 return;
4829         }
4830
4831         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
4832             IS_QLA2100(ha))
4833                 return;
4834         /*
4835          * In tgt_stop mode we also should allow all requests to pass.
4836          * Otherwise, some commands can stuck.
4837          */
4838
4839         tgt->irq_cmd_count++;
4840
4841         switch (code) {
4842         case MBA_RESET:                 /* Reset */
4843         case MBA_SYSTEM_ERR:            /* System Error */
4844         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
4845         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
4846                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
4847                     "qla_target(%d): System error async event %#x "
4848                     "occurred", vha->vp_idx, code);
4849                 break;
4850         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
4851                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4852                 break;
4853
4854         case MBA_LOOP_UP:
4855         {
4856                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4857                     "qla_target(%d): Async LOOP_UP occurred "
4858                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
4859                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4860                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4861                 if (tgt->link_reinit_iocb_pending) {
4862                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4863                             0, 0, 0, 0, 0, 0);
4864                         tgt->link_reinit_iocb_pending = 0;
4865                 }
4866                 break;
4867         }
4868
4869         case MBA_LIP_OCCURRED:
4870         case MBA_LOOP_DOWN:
4871         case MBA_LIP_RESET:
4872         case MBA_RSCN_UPDATE:
4873                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4874                     "qla_target(%d): Async event %#x occurred "
4875                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4876                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4877                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4878                 break;
4879
4880         case MBA_PORT_UPDATE:
4881                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4882                     "qla_target(%d): Port update async event %#x "
4883                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
4884                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
4885                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
4886                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
4887
4888                 login_code = le16_to_cpu(mailbox[2]);
4889                 if (login_code == 0x4)
4890                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4891                             "Async MB 2: Got PLOGI Complete\n");
4892                 else if (login_code == 0x7)
4893                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4894                             "Async MB 2: Port Logged Out\n");
4895                 break;
4896
4897         default:
4898                 break;
4899         }
4900
4901         tgt->irq_cmd_count--;
4902 }
4903
4904 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4905         uint16_t loop_id)
4906 {
4907         fc_port_t *fcport;
4908         int rc;
4909
4910         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4911         if (!fcport) {
4912                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4913                     "qla_target(%d): Allocation of tmp FC port failed",
4914                     vha->vp_idx);
4915                 return NULL;
4916         }
4917
4918         fcport->loop_id = loop_id;
4919
4920         rc = qla2x00_get_port_database(vha, fcport, 0);
4921         if (rc != QLA_SUCCESS) {
4922                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4923                     "qla_target(%d): Failed to retrieve fcport "
4924                     "information -- get_port_database() returned %x "
4925                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4926                 kfree(fcport);
4927                 return NULL;
4928         }
4929
4930         return fcport;
4931 }
4932
4933 /* Must be called under tgt_mutex */
4934 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4935         uint8_t *s_id)
4936 {
4937         struct qla_tgt_sess *sess = NULL;
4938         fc_port_t *fcport = NULL;
4939         int rc, global_resets;
4940         uint16_t loop_id = 0;
4941
4942 retry:
4943         global_resets =
4944             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
4945
4946         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4947         if (rc != 0) {
4948                 if ((s_id[0] == 0xFF) &&
4949                     (s_id[1] == 0xFC)) {
4950                         /*
4951                          * This is Domain Controller, so it should be
4952                          * OK to drop SCSI commands from it.
4953                          */
4954                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4955                             "Unable to find initiator with S_ID %x:%x:%x",
4956                             s_id[0], s_id[1], s_id[2]);
4957                 } else
4958                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4959                             "qla_target(%d): Unable to find "
4960                             "initiator with S_ID %x:%x:%x",
4961                             vha->vp_idx, s_id[0], s_id[1],
4962                             s_id[2]);
4963                 return NULL;
4964         }
4965
4966         fcport = qlt_get_port_database(vha, loop_id);
4967         if (!fcport)
4968                 return NULL;
4969
4970         if (global_resets !=
4971             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
4972                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4973                     "qla_target(%d): global reset during session discovery "
4974                     "(counter was %d, new %d), retrying", vha->vp_idx,
4975                     global_resets,
4976                     atomic_read(&vha->vha_tgt.
4977                         qla_tgt->tgt_global_resets_count));
4978                 goto retry;
4979         }
4980
4981         sess = qlt_create_sess(vha, fcport, true);
4982
4983         kfree(fcport);
4984         return sess;
4985 }
4986
4987 static void qlt_abort_work(struct qla_tgt *tgt,
4988         struct qla_tgt_sess_work_param *prm)
4989 {
4990         struct scsi_qla_host *vha = tgt->vha;
4991         struct qla_hw_data *ha = vha->hw;
4992         struct qla_tgt_sess *sess = NULL;
4993         unsigned long flags;
4994         uint32_t be_s_id;
4995         uint8_t s_id[3];
4996         int rc;
4997
4998         spin_lock_irqsave(&ha->hardware_lock, flags);
4999
5000         if (tgt->tgt_stop)
5001                 goto out_term;
5002
5003         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
5004         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
5005         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
5006
5007         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
5008             (unsigned char *)&be_s_id);
5009         if (!sess) {
5010                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5011
5012                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5013                 sess = qlt_make_local_sess(vha, s_id);
5014                 /* sess has got an extra creation ref */
5015                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5016
5017                 spin_lock_irqsave(&ha->hardware_lock, flags);
5018                 if (!sess)
5019                         goto out_term;
5020         } else {
5021                 kref_get(&sess->se_sess->sess_kref);
5022         }
5023
5024         if (tgt->tgt_stop)
5025                 goto out_term;
5026
5027         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
5028         if (rc != 0)
5029                 goto out_term;
5030
5031         ha->tgt.tgt_ops->put_sess(sess);
5032         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5033         return;
5034
5035 out_term:
5036         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
5037         if (sess)
5038                 ha->tgt.tgt_ops->put_sess(sess);
5039         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5040 }
5041
5042 static void qlt_tmr_work(struct qla_tgt *tgt,
5043         struct qla_tgt_sess_work_param *prm)
5044 {
5045         struct atio_from_isp *a = &prm->tm_iocb2;
5046         struct scsi_qla_host *vha = tgt->vha;
5047         struct qla_hw_data *ha = vha->hw;
5048         struct qla_tgt_sess *sess = NULL;
5049         unsigned long flags;
5050         uint8_t *s_id = NULL; /* to hide compiler warnings */
5051         int rc;
5052         uint32_t lun, unpacked_lun;
5053         int lun_size, fn;
5054         void *iocb;
5055
5056         spin_lock_irqsave(&ha->hardware_lock, flags);
5057
5058         if (tgt->tgt_stop)
5059                 goto out_term;
5060
5061         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
5062         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
5063         if (!sess) {
5064                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5065
5066                 mutex_lock(&vha->vha_tgt.tgt_mutex);
5067                 sess = qlt_make_local_sess(vha, s_id);
5068                 /* sess has got an extra creation ref */
5069                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
5070
5071                 spin_lock_irqsave(&ha->hardware_lock, flags);
5072                 if (!sess)
5073                         goto out_term;
5074         } else {
5075                 kref_get(&sess->se_sess->sess_kref);
5076         }
5077
5078         iocb = a;
5079         lun = a->u.isp24.fcp_cmnd.lun;
5080         lun_size = sizeof(lun);
5081         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
5082         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
5083
5084         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
5085         if (rc != 0)
5086                 goto out_term;
5087
5088         ha->tgt.tgt_ops->put_sess(sess);
5089         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5090         return;
5091
5092 out_term:
5093         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
5094         if (sess)
5095                 ha->tgt.tgt_ops->put_sess(sess);
5096         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5097 }
5098
5099 static void qlt_sess_work_fn(struct work_struct *work)
5100 {
5101         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
5102         struct scsi_qla_host *vha = tgt->vha;
5103         unsigned long flags;
5104
5105         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
5106
5107         spin_lock_irqsave(&tgt->sess_work_lock, flags);
5108         while (!list_empty(&tgt->sess_works_list)) {
5109                 struct qla_tgt_sess_work_param *prm = list_entry(
5110                     tgt->sess_works_list.next, typeof(*prm),
5111                     sess_works_list_entry);
5112
5113                 /*
5114                  * This work can be scheduled on several CPUs at time, so we
5115                  * must delete the entry to eliminate double processing
5116                  */
5117                 list_del(&prm->sess_works_list_entry);
5118
5119                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5120
5121                 switch (prm->type) {
5122                 case QLA_TGT_SESS_WORK_ABORT:
5123                         qlt_abort_work(tgt, prm);
5124                         break;
5125                 case QLA_TGT_SESS_WORK_TM:
5126                         qlt_tmr_work(tgt, prm);
5127                         break;
5128                 default:
5129                         BUG_ON(1);
5130                         break;
5131                 }
5132
5133                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
5134
5135                 kfree(prm);
5136         }
5137         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
5138 }
5139
5140 /* Must be called under tgt_host_action_mutex */
5141 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
5142 {
5143         struct qla_tgt *tgt;
5144
5145         if (!QLA_TGT_MODE_ENABLED())
5146                 return 0;
5147
5148         if (!IS_TGT_MODE_CAPABLE(ha)) {
5149                 ql_log(ql_log_warn, base_vha, 0xe070,
5150                     "This adapter does not support target mode.\n");
5151                 return 0;
5152         }
5153
5154         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
5155             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
5156
5157         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
5158
5159         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
5160         if (!tgt) {
5161                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
5162                     "Unable to allocate struct qla_tgt\n");
5163                 return -ENOMEM;
5164         }
5165
5166         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
5167                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
5168
5169         tgt->ha = ha;
5170         tgt->vha = base_vha;
5171         init_waitqueue_head(&tgt->waitQ);
5172         INIT_LIST_HEAD(&tgt->sess_list);
5173         INIT_LIST_HEAD(&tgt->del_sess_list);
5174         INIT_DELAYED_WORK(&tgt->sess_del_work,
5175                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
5176         spin_lock_init(&tgt->sess_work_lock);
5177         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
5178         INIT_LIST_HEAD(&tgt->sess_works_list);
5179         spin_lock_init(&tgt->srr_lock);
5180         INIT_LIST_HEAD(&tgt->srr_ctio_list);
5181         INIT_LIST_HEAD(&tgt->srr_imm_list);
5182         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
5183         atomic_set(&tgt->tgt_global_resets_count, 0);
5184
5185         base_vha->vha_tgt.qla_tgt = tgt;
5186
5187         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
5188                 "qla_target(%d): using 64 Bit PCI addressing",
5189                 base_vha->vp_idx);
5190         tgt->tgt_enable_64bit_addr = 1;
5191         /* 3 is reserved */
5192         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
5193         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
5194         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
5195
5196         if (base_vha->fc_vport)
5197                 return 0;
5198
5199         mutex_lock(&qla_tgt_mutex);
5200         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
5201         mutex_unlock(&qla_tgt_mutex);
5202
5203         return 0;
5204 }
5205
5206 /* Must be called under tgt_host_action_mutex */
5207 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
5208 {
5209         if (!vha->vha_tgt.qla_tgt)
5210                 return 0;
5211
5212         if (vha->fc_vport) {
5213                 qlt_release(vha->vha_tgt.qla_tgt);
5214                 return 0;
5215         }
5216
5217         /* free left over qfull cmds */
5218         qlt_init_term_exchange(vha);
5219
5220         mutex_lock(&qla_tgt_mutex);
5221         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
5222         mutex_unlock(&qla_tgt_mutex);
5223
5224         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
5225             vha->host_no, ha);
5226         qlt_release(vha->vha_tgt.qla_tgt);
5227
5228         return 0;
5229 }
5230
5231 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
5232         unsigned char *b)
5233 {
5234         int i;
5235
5236         pr_debug("qla2xxx HW vha->node_name: ");
5237         for (i = 0; i < WWN_SIZE; i++)
5238                 pr_debug("%02x ", vha->node_name[i]);
5239         pr_debug("\n");
5240         pr_debug("qla2xxx HW vha->port_name: ");
5241         for (i = 0; i < WWN_SIZE; i++)
5242                 pr_debug("%02x ", vha->port_name[i]);
5243         pr_debug("\n");
5244
5245         pr_debug("qla2xxx passed configfs WWPN: ");
5246         put_unaligned_be64(wwpn, b);
5247         for (i = 0; i < WWN_SIZE; i++)
5248                 pr_debug("%02x ", b[i]);
5249         pr_debug("\n");
5250 }
5251
5252 /**
5253  * qla_tgt_lport_register - register lport with external module
5254  *
5255  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
5256  * @wwpn: Passwd FC target WWPN
5257  * @callback:  lport initialization callback for tcm_qla2xxx code
5258  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
5259  */
5260 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
5261                        u64 npiv_wwpn, u64 npiv_wwnn,
5262                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
5263 {
5264         struct qla_tgt *tgt;
5265         struct scsi_qla_host *vha;
5266         struct qla_hw_data *ha;
5267         struct Scsi_Host *host;
5268         unsigned long flags;
5269         int rc;
5270         u8 b[WWN_SIZE];
5271
5272         mutex_lock(&qla_tgt_mutex);
5273         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
5274                 vha = tgt->vha;
5275                 ha = vha->hw;
5276
5277                 host = vha->host;
5278                 if (!host)
5279                         continue;
5280
5281                 if (!(host->hostt->supported_mode & MODE_TARGET))
5282                         continue;
5283
5284                 spin_lock_irqsave(&ha->hardware_lock, flags);
5285                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
5286                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
5287                             host->host_no);
5288                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5289                         continue;
5290                 }
5291                 if (tgt->tgt_stop) {
5292                         pr_debug("MODE_TARGET in shutdown on qla2xxx(%d)\n",
5293                                  host->host_no);
5294                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5295                         continue;
5296                 }
5297                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
5298
5299                 if (!scsi_host_get(host)) {
5300                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
5301                             "Unable to scsi_host_get() for"
5302                             " qla2xxx scsi_host\n");
5303                         continue;
5304                 }
5305                 qlt_lport_dump(vha, phys_wwpn, b);
5306
5307                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
5308                         scsi_host_put(host);
5309                         continue;
5310                 }
5311                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
5312                 if (rc != 0)
5313                         scsi_host_put(host);
5314
5315                 mutex_unlock(&qla_tgt_mutex);
5316                 return rc;
5317         }
5318         mutex_unlock(&qla_tgt_mutex);
5319
5320         return -ENODEV;
5321 }
5322 EXPORT_SYMBOL(qlt_lport_register);
5323
5324 /**
5325  * qla_tgt_lport_deregister - Degister lport
5326  *
5327  * @vha:  Registered scsi_qla_host pointer
5328  */
5329 void qlt_lport_deregister(struct scsi_qla_host *vha)
5330 {
5331         struct qla_hw_data *ha = vha->hw;
5332         struct Scsi_Host *sh = vha->host;
5333         /*
5334          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
5335          */
5336         vha->vha_tgt.target_lport_ptr = NULL;
5337         ha->tgt.tgt_ops = NULL;
5338         /*
5339          * Release the Scsi_Host reference for the underlying qla2xxx host
5340          */
5341         scsi_host_put(sh);
5342 }
5343 EXPORT_SYMBOL(qlt_lport_deregister);
5344
5345 /* Must be called under HW lock */
5346 void qlt_set_mode(struct scsi_qla_host *vha)
5347 {
5348         struct qla_hw_data *ha = vha->hw;
5349
5350         switch (ql2x_ini_mode) {
5351         case QLA2XXX_INI_MODE_DISABLED:
5352         case QLA2XXX_INI_MODE_EXCLUSIVE:
5353                 vha->host->active_mode = MODE_TARGET;
5354                 break;
5355         case QLA2XXX_INI_MODE_ENABLED:
5356                 vha->host->active_mode |= MODE_TARGET;
5357                 break;
5358         default:
5359                 break;
5360         }
5361
5362         if (ha->tgt.ini_mode_force_reverse)
5363                 qla_reverse_ini_mode(vha);
5364 }
5365
5366 /* Must be called under HW lock */
5367 void qlt_clear_mode(struct scsi_qla_host *vha)
5368 {
5369         struct qla_hw_data *ha = vha->hw;
5370
5371         switch (ql2x_ini_mode) {
5372         case QLA2XXX_INI_MODE_DISABLED:
5373                 vha->host->active_mode = MODE_UNKNOWN;
5374                 break;
5375         case QLA2XXX_INI_MODE_EXCLUSIVE:
5376                 vha->host->active_mode = MODE_INITIATOR;
5377                 break;
5378         case QLA2XXX_INI_MODE_ENABLED:
5379                 vha->host->active_mode &= ~MODE_TARGET;
5380                 break;
5381         default:
5382                 break;
5383         }
5384
5385         if (ha->tgt.ini_mode_force_reverse)
5386                 qla_reverse_ini_mode(vha);
5387 }
5388
5389 /*
5390  * qla_tgt_enable_vha - NO LOCK HELD
5391  *
5392  * host_reset, bring up w/ Target Mode Enabled
5393  */
5394 void
5395 qlt_enable_vha(struct scsi_qla_host *vha)
5396 {
5397         struct qla_hw_data *ha = vha->hw;
5398         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5399         unsigned long flags;
5400         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
5401
5402         if (!tgt) {
5403                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
5404                     "Unable to locate qla_tgt pointer from"
5405                     " struct qla_hw_data\n");
5406                 dump_stack();
5407                 return;
5408         }
5409
5410         spin_lock_irqsave(&ha->hardware_lock, flags);
5411         tgt->tgt_stopped = 0;
5412         qlt_set_mode(vha);
5413         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5414
5415         if (vha->vp_idx) {
5416                 qla24xx_disable_vp(vha);
5417                 qla24xx_enable_vp(vha);
5418         } else {
5419                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
5420                 qla2xxx_wake_dpc(base_vha);
5421                 qla2x00_wait_for_hba_online(base_vha);
5422         }
5423 }
5424 EXPORT_SYMBOL(qlt_enable_vha);
5425
5426 /*
5427  * qla_tgt_disable_vha - NO LOCK HELD
5428  *
5429  * Disable Target Mode and reset the adapter
5430  */
5431 void
5432 qlt_disable_vha(struct scsi_qla_host *vha)
5433 {
5434         struct qla_hw_data *ha = vha->hw;
5435         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
5436         unsigned long flags;
5437
5438         if (!tgt) {
5439                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
5440                     "Unable to locate qla_tgt pointer from"
5441                     " struct qla_hw_data\n");
5442                 dump_stack();
5443                 return;
5444         }
5445
5446         spin_lock_irqsave(&ha->hardware_lock, flags);
5447         qlt_clear_mode(vha);
5448         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5449
5450         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
5451         qla2xxx_wake_dpc(vha);
5452         qla2x00_wait_for_hba_online(vha);
5453 }
5454
5455 /*
5456  * Called from qla_init.c:qla24xx_vport_create() contex to setup
5457  * the target mode specific struct scsi_qla_host and struct qla_hw_data
5458  * members.
5459  */
5460 void
5461 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
5462 {
5463         if (!qla_tgt_mode_enabled(vha))
5464                 return;
5465
5466         vha->vha_tgt.qla_tgt = NULL;
5467
5468         mutex_init(&vha->vha_tgt.tgt_mutex);
5469         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
5470
5471         qlt_clear_mode(vha);
5472
5473         /*
5474          * NOTE: Currently the value is kept the same for <24xx and
5475          * >=24xx ISPs. If it is necessary to change it,
5476          * the check should be added for specific ISPs,
5477          * assigning the value appropriately.
5478          */
5479         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
5480
5481         qlt_add_target(ha, vha);
5482 }
5483
5484 void
5485 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
5486 {
5487         /*
5488          * FC-4 Feature bit 0 indicates target functionality to the name server.
5489          */
5490         if (qla_tgt_mode_enabled(vha)) {
5491                 if (qla_ini_mode_enabled(vha))
5492                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
5493                 else
5494                         ct_req->req.rff_id.fc4_feature = BIT_0;
5495         } else if (qla_ini_mode_enabled(vha)) {
5496                 ct_req->req.rff_id.fc4_feature = BIT_1;
5497         }
5498 }
5499
5500 /*
5501  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
5502  * @ha: HA context
5503  *
5504  * Beginning of ATIO ring has initialization control block already built
5505  * by nvram config routine.
5506  *
5507  * Returns 0 on success.
5508  */
5509 void
5510 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
5511 {
5512         struct qla_hw_data *ha = vha->hw;
5513         uint16_t cnt;
5514         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
5515
5516         if (!qla_tgt_mode_enabled(vha))
5517                 return;
5518
5519         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
5520                 pkt->u.raw.signature = ATIO_PROCESSED;
5521                 pkt++;
5522         }
5523
5524 }
5525
5526 /*
5527  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
5528  * @ha: SCSI driver HA context
5529  */
5530 void
5531 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
5532 {
5533         struct qla_hw_data *ha = vha->hw;
5534         struct atio_from_isp *pkt;
5535         int cnt, i;
5536
5537         if (!vha->flags.online)
5538                 return;
5539
5540         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
5541                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5542                 cnt = pkt->u.raw.entry_count;
5543
5544                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
5545
5546                 for (i = 0; i < cnt; i++) {
5547                         ha->tgt.atio_ring_index++;
5548                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
5549                                 ha->tgt.atio_ring_index = 0;
5550                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
5551                         } else
5552                                 ha->tgt.atio_ring_ptr++;
5553
5554                         pkt->u.raw.signature = ATIO_PROCESSED;
5555                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
5556                 }
5557                 wmb();
5558         }
5559
5560         /* Adjust ring index */
5561         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
5562 }
5563
5564 void
5565 qlt_24xx_config_rings(struct scsi_qla_host *vha)
5566 {
5567         struct qla_hw_data *ha = vha->hw;
5568         if (!QLA_TGT_MODE_ENABLED())
5569                 return;
5570
5571         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
5572         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
5573         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
5574
5575         if (IS_ATIO_MSIX_CAPABLE(ha)) {
5576                 struct qla_msix_entry *msix = &ha->msix_entries[2];
5577                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
5578
5579                 icb->msix_atio = cpu_to_le16(msix->entry);
5580                 ql_dbg(ql_dbg_init, vha, 0xf072,
5581                     "Registering ICB vector 0x%x for atio que.\n",
5582                     msix->entry);
5583         }
5584 }
5585
5586 void
5587 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
5588 {
5589         struct qla_hw_data *ha = vha->hw;
5590
5591         if (qla_tgt_mode_enabled(vha)) {
5592                 if (!ha->tgt.saved_set) {
5593                         /* We save only once */
5594                         ha->tgt.saved_exchange_count = nv->exchange_count;
5595                         ha->tgt.saved_firmware_options_1 =
5596                             nv->firmware_options_1;
5597                         ha->tgt.saved_firmware_options_2 =
5598                             nv->firmware_options_2;
5599                         ha->tgt.saved_firmware_options_3 =
5600                             nv->firmware_options_3;
5601                         ha->tgt.saved_set = 1;
5602                 }
5603
5604                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5605
5606                 /* Enable target mode */
5607                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5608
5609                 /* Disable ini mode, if requested */
5610                 if (!qla_ini_mode_enabled(vha))
5611                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
5612
5613                 /* Disable Full Login after LIP */
5614                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5615                 /* Enable initial LIP */
5616                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5617                 if (ql2xtgt_tape_enable)
5618                         /* Enable FC Tape support */
5619                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5620                 else
5621                         /* Disable FC Tape support */
5622                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5623
5624                 /* Disable Full Login after LIP */
5625                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5626                 /* Enable target PRLI control */
5627                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5628         } else {
5629                 if (ha->tgt.saved_set) {
5630                         nv->exchange_count = ha->tgt.saved_exchange_count;
5631                         nv->firmware_options_1 =
5632                             ha->tgt.saved_firmware_options_1;
5633                         nv->firmware_options_2 =
5634                             ha->tgt.saved_firmware_options_2;
5635                         nv->firmware_options_3 =
5636                             ha->tgt.saved_firmware_options_3;
5637                 }
5638                 return;
5639         }
5640
5641         /* out-of-order frames reassembly */
5642         nv->firmware_options_3 |= BIT_6|BIT_9;
5643
5644         if (ha->tgt.enable_class_2) {
5645                 if (vha->flags.init_done)
5646                         fc_host_supported_classes(vha->host) =
5647                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5648
5649                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5650         } else {
5651                 if (vha->flags.init_done)
5652                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5653
5654                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5655         }
5656 }
5657
5658 void
5659 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
5660         struct init_cb_24xx *icb)
5661 {
5662         struct qla_hw_data *ha = vha->hw;
5663
5664         if (ha->tgt.node_name_set) {
5665                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5666                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5667         }
5668 }
5669
5670 void
5671 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
5672 {
5673         struct qla_hw_data *ha = vha->hw;
5674
5675         if (!QLA_TGT_MODE_ENABLED())
5676                 return;
5677
5678         if (qla_tgt_mode_enabled(vha)) {
5679                 if (!ha->tgt.saved_set) {
5680                         /* We save only once */
5681                         ha->tgt.saved_exchange_count = nv->exchange_count;
5682                         ha->tgt.saved_firmware_options_1 =
5683                             nv->firmware_options_1;
5684                         ha->tgt.saved_firmware_options_2 =
5685                             nv->firmware_options_2;
5686                         ha->tgt.saved_firmware_options_3 =
5687                             nv->firmware_options_3;
5688                         ha->tgt.saved_set = 1;
5689                 }
5690
5691                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
5692
5693                 /* Enable target mode */
5694                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
5695
5696                 /* Disable ini mode, if requested */
5697                 if (!qla_ini_mode_enabled(vha))
5698                         nv->firmware_options_1 |=
5699                             __constant_cpu_to_le32(BIT_5);
5700
5701                 /* Disable Full Login after LIP */
5702                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
5703                 /* Enable initial LIP */
5704                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
5705                 if (ql2xtgt_tape_enable)
5706                         /* Enable FC tape support */
5707                         nv->firmware_options_2 |= cpu_to_le32(BIT_12);
5708                 else
5709                         /* Disable FC tape support */
5710                         nv->firmware_options_2 &= cpu_to_le32(~BIT_12);
5711
5712                 /* Disable Full Login after LIP */
5713                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
5714                 /* Enable target PRLI control */
5715                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
5716         } else {
5717                 if (ha->tgt.saved_set) {
5718                         nv->exchange_count = ha->tgt.saved_exchange_count;
5719                         nv->firmware_options_1 =
5720                             ha->tgt.saved_firmware_options_1;
5721                         nv->firmware_options_2 =
5722                             ha->tgt.saved_firmware_options_2;
5723                         nv->firmware_options_3 =
5724                             ha->tgt.saved_firmware_options_3;
5725                 }
5726                 return;
5727         }
5728
5729         /* out-of-order frames reassembly */
5730         nv->firmware_options_3 |= BIT_6|BIT_9;
5731
5732         if (ha->tgt.enable_class_2) {
5733                 if (vha->flags.init_done)
5734                         fc_host_supported_classes(vha->host) =
5735                                 FC_COS_CLASS2 | FC_COS_CLASS3;
5736
5737                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
5738         } else {
5739                 if (vha->flags.init_done)
5740                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
5741
5742                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
5743         }
5744 }
5745
5746 void
5747 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
5748         struct init_cb_81xx *icb)
5749 {
5750         struct qla_hw_data *ha = vha->hw;
5751
5752         if (!QLA_TGT_MODE_ENABLED())
5753                 return;
5754
5755         if (ha->tgt.node_name_set) {
5756                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
5757                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
5758         }
5759 }
5760
5761 void
5762 qlt_83xx_iospace_config(struct qla_hw_data *ha)
5763 {
5764         if (!QLA_TGT_MODE_ENABLED())
5765                 return;
5766
5767         ha->msix_count += 1; /* For ATIO Q */
5768 }
5769
5770 int
5771 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
5772         struct sts_entry_24xx *pkt)
5773 {
5774         switch (pkt->entry_type) {
5775         case ABTS_RECV_24XX:
5776         case ABTS_RESP_24XX:
5777         case CTIO_TYPE7:
5778         case NOTIFY_ACK_TYPE:
5779         case CTIO_CRC2:
5780                 return 1;
5781         default:
5782                 return 0;
5783         }
5784 }
5785
5786 void
5787 qlt_modify_vp_config(struct scsi_qla_host *vha,
5788         struct vp_config_entry_24xx *vpmod)
5789 {
5790         if (qla_tgt_mode_enabled(vha))
5791                 vpmod->options_idx1 &= ~BIT_5;
5792         /* Disable ini mode, if requested */
5793         if (!qla_ini_mode_enabled(vha))
5794                 vpmod->options_idx1 &= ~BIT_4;
5795 }
5796
5797 void
5798 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
5799 {
5800         if (!QLA_TGT_MODE_ENABLED())
5801                 return;
5802
5803         if  (ha->mqenable || IS_QLA83XX(ha)) {
5804                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
5805                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
5806         } else {
5807                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
5808                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
5809         }
5810
5811         mutex_init(&base_vha->vha_tgt.tgt_mutex);
5812         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
5813         qlt_clear_mode(base_vha);
5814 }
5815
5816 irqreturn_t
5817 qla83xx_msix_atio_q(int irq, void *dev_id)
5818 {
5819         struct rsp_que *rsp;
5820         scsi_qla_host_t *vha;
5821         struct qla_hw_data *ha;
5822         unsigned long flags;
5823
5824         rsp = (struct rsp_que *) dev_id;
5825         ha = rsp->hw;
5826         vha = pci_get_drvdata(ha->pdev);
5827
5828         spin_lock_irqsave(&ha->hardware_lock, flags);
5829
5830         qlt_24xx_process_atio_queue(vha);
5831         qla24xx_process_response_queue(vha, rsp);
5832
5833         spin_unlock_irqrestore(&ha->hardware_lock, flags);
5834
5835         return IRQ_HANDLED;
5836 }
5837
5838 int
5839 qlt_mem_alloc(struct qla_hw_data *ha)
5840 {
5841         if (!QLA_TGT_MODE_ENABLED())
5842                 return 0;
5843
5844         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
5845             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
5846         if (!ha->tgt.tgt_vp_map)
5847                 return -ENOMEM;
5848
5849         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
5850             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
5851             &ha->tgt.atio_dma, GFP_KERNEL);
5852         if (!ha->tgt.atio_ring) {
5853                 kfree(ha->tgt.tgt_vp_map);
5854                 return -ENOMEM;
5855         }
5856         return 0;
5857 }
5858
5859 void
5860 qlt_mem_free(struct qla_hw_data *ha)
5861 {
5862         if (!QLA_TGT_MODE_ENABLED())
5863                 return;
5864
5865         if (ha->tgt.atio_ring) {
5866                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
5867                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
5868                     ha->tgt.atio_dma);
5869         }
5870         kfree(ha->tgt.tgt_vp_map);
5871 }
5872
5873 /* vport_slock to be held by the caller */
5874 void
5875 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
5876 {
5877         if (!QLA_TGT_MODE_ENABLED())
5878                 return;
5879
5880         switch (cmd) {
5881         case SET_VP_IDX:
5882                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
5883                 break;
5884         case SET_AL_PA:
5885                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
5886                 break;
5887         case RESET_VP_IDX:
5888                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
5889                 break;
5890         case RESET_AL_PA:
5891                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
5892                 break;
5893         }
5894 }
5895
5896 static int __init qlt_parse_ini_mode(void)
5897 {
5898         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
5899                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
5900         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
5901                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
5902         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
5903                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
5904         else
5905                 return false;
5906
5907         return true;
5908 }
5909
5910 int __init qlt_init(void)
5911 {
5912         int ret;
5913
5914         if (!qlt_parse_ini_mode()) {
5915                 ql_log(ql_log_fatal, NULL, 0xe06b,
5916                     "qlt_parse_ini_mode() failed\n");
5917                 return -EINVAL;
5918         }
5919
5920         if (!QLA_TGT_MODE_ENABLED())
5921                 return 0;
5922
5923         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
5924             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
5925             qla_tgt_mgmt_cmd), 0, NULL);
5926         if (!qla_tgt_mgmt_cmd_cachep) {
5927                 ql_log(ql_log_fatal, NULL, 0xe06d,
5928                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
5929                 return -ENOMEM;
5930         }
5931
5932         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
5933             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
5934         if (!qla_tgt_mgmt_cmd_mempool) {
5935                 ql_log(ql_log_fatal, NULL, 0xe06e,
5936                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
5937                 ret = -ENOMEM;
5938                 goto out_mgmt_cmd_cachep;
5939         }
5940
5941         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
5942         if (!qla_tgt_wq) {
5943                 ql_log(ql_log_fatal, NULL, 0xe06f,
5944                     "alloc_workqueue for qla_tgt_wq failed\n");
5945                 ret = -ENOMEM;
5946                 goto out_cmd_mempool;
5947         }
5948         /*
5949          * Return 1 to signal that initiator-mode is being disabled
5950          */
5951         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
5952
5953 out_cmd_mempool:
5954         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5955 out_mgmt_cmd_cachep:
5956         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5957         return ret;
5958 }
5959
5960 void qlt_exit(void)
5961 {
5962         if (!QLA_TGT_MODE_ENABLED())
5963                 return;
5964
5965         destroy_workqueue(qla_tgt_wq);
5966         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
5967         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
5968 }