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 char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  46 module_param(qlini_mode, charp, S_IRUGO);
  47 MODULE_PARM_DESC(qlini_mode,
  48         "Determines when initiator mode will be enabled. Possible values: "
  49         "\"exclusive\" - initiator mode will be enabled on load, "
  50         "disabled on enabling target mode and then on disabling target mode "
  51         "enabled back; "
  52         "\"disabled\" - initiator mode will never be enabled; "
  53         "\"enabled\" (default) - initiator mode will always stay enabled.");
  54
  55 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  56
  57 /*
  58  * From scsi/fc/fc_fcp.h
  59  */
  60 enum fcp_resp_rsp_codes {
  61         FCP_TMF_CMPL = 0,
  62         FCP_DATA_LEN_INVALID = 1,
  63         FCP_CMND_FIELDS_INVALID = 2,
  64         FCP_DATA_PARAM_MISMATCH = 3,
  65         FCP_TMF_REJECTED = 4,
  66         FCP_TMF_FAILED = 5,
  67         FCP_TMF_INVALID_LUN = 9,
  68 };
  69
  70 /*
  71  * fc_pri_ta from scsi/fc/fc_fcp.h
  72  */
  73 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  74 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  75 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  76 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  77 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  78 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  79 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  80
  81 /*
  82  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  83  * must be called under HW lock and could unlock/lock it inside.
  84  * It isn't an issue, since in the current implementation on the time when
  85  * those functions are called:
  86  *
  87  *   - Either context is IRQ and only IRQ handler can modify HW data,
  88  *     including rings related fields,
  89  *
  90  *   - Or access to target mode variables from struct qla_tgt doesn't
  91  *     cross those functions boundaries, except tgt_stop, which
  92  *     additionally protected by irq_cmd_count.
  93  */
  94 /* Predefs for callbacks handed to qla2xxx LLD */
  95 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
  96         struct atio_from_isp *pkt);
  97 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
  98 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
  99         int fn, void *iocb, int flags);
 100 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 101         *cmd, struct atio_from_isp *atio, int ha_locked);
 102 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 103         struct qla_tgt_srr_imm *imm, int ha_lock);
 104 /*
 105  * Global Variables
 106  */
 107 static struct kmem_cache *qla_tgt_cmd_cachep;
 108 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 109 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 110 static struct workqueue_struct *qla_tgt_wq;
 111 static DEFINE_MUTEX(qla_tgt_mutex);
 112 static LIST_HEAD(qla_tgt_glist);
 113
 114 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 115 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 116         struct qla_tgt *tgt,
 117         const uint8_t *port_name)
 118 {
 119         struct qla_tgt_sess *sess;
 120
 121         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 122                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 123                         return sess;
 124         }
 125
 126         return NULL;
 127 }
 128
 129 /* Might release hw lock, then reaquire!! */
 130 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 131 {
 132         /* Send marker if required */
 133         if (unlikely(vha->marker_needed != 0)) {
 134                 int rc = qla2x00_issue_marker(vha, vha_locked);
 135                 if (rc != QLA_SUCCESS) {
 136                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 137                             "qla_target(%d): issue_marker() failed\n",
 138                             vha->vp_idx);
 139                 }
 140                 return rc;
 141         }
 142         return QLA_SUCCESS;
 143 }
 144
 145 static inline
 146 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 147         uint8_t *d_id)
 148 {
 149         struct qla_hw_data *ha = vha->hw;
 150         uint8_t vp_idx;
 151
 152         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 153                 return NULL;
 154
 155         if (vha->d_id.b.al_pa == d_id[2])
 156                 return vha;
 157
 158         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 159         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 160         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 161                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 162
 163         return NULL;
 164 }
 165
 166 static inline
 167 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 168         uint16_t vp_idx)
 169 {
 170         struct qla_hw_data *ha = vha->hw;
 171
 172         if (vha->vp_idx == vp_idx)
 173                 return vha;
 174
 175         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 176         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 177                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 178
 179         return NULL;
 180 }
 181
 182 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 183         struct atio_from_isp *atio)
 184 {
 185         switch (atio->u.raw.entry_type) {
 186         case ATIO_TYPE7:
 187         {
 188                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 189                     atio->u.isp24.fcp_hdr.d_id);
 190                 if (unlikely(NULL == host)) {
 191                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 192                             "qla_target(%d): Received ATIO_TYPE7 "
 193                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 194                             atio->u.isp24.fcp_hdr.d_id[0],
 195                             atio->u.isp24.fcp_hdr.d_id[1],
 196                             atio->u.isp24.fcp_hdr.d_id[2]);
 197                         break;
 198                 }
 199                 qlt_24xx_atio_pkt(host, atio);
 200                 break;
 201         }
 202
 203         case IMMED_NOTIFY_TYPE:
 204         {
 205                 struct scsi_qla_host *host = vha;
 206                 struct imm_ntfy_from_isp *entry =
 207                     (struct imm_ntfy_from_isp *)atio;
 208
 209                 if ((entry->u.isp24.vp_index != 0xFF) &&
 210                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 211                         host = qlt_find_host_by_vp_idx(vha,
 212                             entry->u.isp24.vp_index);
 213                         if (unlikely(!host)) {
 214                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 215                                     "qla_target(%d): Received "
 216                                     "ATIO (IMMED_NOTIFY_TYPE) "
 217                                     "with unknown vp_index %d\n",
 218                                     vha->vp_idx, entry->u.isp24.vp_index);
 219                                 break;
 220                         }
 221                 }
 222                 qlt_24xx_atio_pkt(host, atio);
 223                 break;
 224         }
 225
 226         default:
 227                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 228                     "qla_target(%d): Received unknown ATIO atio "
 229                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 230                 break;
 231         }
 232
 233         return;
 234 }
 235
 236 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 237 {
 238         switch (pkt->entry_type) {
 239         case CTIO_TYPE7:
 240         {
 241                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 242                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 243                     entry->vp_index);
 244                 if (unlikely(!host)) {
 245                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 246                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 247                             "received, with unknown vp_index %d\n",
 248                             vha->vp_idx, entry->vp_index);
 249                         break;
 250                 }
 251                 qlt_response_pkt(host, pkt);
 252                 break;
 253         }
 254
 255         case IMMED_NOTIFY_TYPE:
 256         {
 257                 struct scsi_qla_host *host = vha;
 258                 struct imm_ntfy_from_isp *entry =
 259                     (struct imm_ntfy_from_isp *)pkt;
 260
 261                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 262                 if (unlikely(!host)) {
 263                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 264                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 265                             "received, with unknown vp_index %d\n",
 266                             vha->vp_idx, entry->u.isp24.vp_index);
 267                         break;
 268                 }
 269                 qlt_response_pkt(host, pkt);
 270                 break;
 271         }
 272
 273         case NOTIFY_ACK_TYPE:
 274         {
 275                 struct scsi_qla_host *host = vha;
 276                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 277
 278                 if (0xFF != entry->u.isp24.vp_index) {
 279                         host = qlt_find_host_by_vp_idx(vha,
 280                             entry->u.isp24.vp_index);
 281                         if (unlikely(!host)) {
 282                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 283                                     "qla_target(%d): Response "
 284                                     "pkt (NOTIFY_ACK_TYPE) "
 285                                     "received, with unknown "
 286                                     "vp_index %d\n", vha->vp_idx,
 287                                     entry->u.isp24.vp_index);
 288                                 break;
 289                         }
 290                 }
 291                 qlt_response_pkt(host, pkt);
 292                 break;
 293         }
 294
 295         case ABTS_RECV_24XX:
 296         {
 297                 struct abts_recv_from_24xx *entry =
 298                     (struct abts_recv_from_24xx *)pkt;
 299                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 300                     entry->vp_index);
 301                 if (unlikely(!host)) {
 302                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 303                             "qla_target(%d): Response pkt "
 304                             "(ABTS_RECV_24XX) received, with unknown "
 305                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 306                         break;
 307                 }
 308                 qlt_response_pkt(host, pkt);
 309                 break;
 310         }
 311
 312         case ABTS_RESP_24XX:
 313         {
 314                 struct abts_resp_to_24xx *entry =
 315                     (struct abts_resp_to_24xx *)pkt;
 316                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 317                     entry->vp_index);
 318                 if (unlikely(!host)) {
 319                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 320                             "qla_target(%d): Response pkt "
 321                             "(ABTS_RECV_24XX) received, with unknown "
 322                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 323                         break;
 324                 }
 325                 qlt_response_pkt(host, pkt);
 326                 break;
 327         }
 328
 329         default:
 330                 qlt_response_pkt(vha, pkt);
 331                 break;
 332         }
 333
 334 }
 335
 336 static void qlt_free_session_done(struct work_struct *work)
 337 {
 338         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 339             free_work);
 340         struct qla_tgt *tgt = sess->tgt;
 341         struct scsi_qla_host *vha = sess->vha;
 342         struct qla_hw_data *ha = vha->hw;
 343
 344         BUG_ON(!tgt);
 345         /*
 346          * Release the target session for FC Nexus from fabric module code.
 347          */
 348         if (sess->se_sess != NULL)
 349                 ha->tgt.tgt_ops->free_session(sess);
 350
 351         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 352             "Unregistration of sess %p finished\n", sess);
 353
 354         kfree(sess);
 355         /*
 356          * We need to protect against race, when tgt is freed before or
 357          * inside wake_up()
 358          */
 359         tgt->sess_count--;
 360         if (tgt->sess_count == 0)
 361                 wake_up_all(&tgt->waitQ);
 362 }
 363
 364 /* ha->hardware_lock supposed to be held on entry */
 365 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 366 {
 367         struct scsi_qla_host *vha = sess->vha;
 368
 369         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 370
 371         list_del(&sess->sess_list_entry);
 372         if (sess->deleted)
 373                 list_del(&sess->del_list_entry);
 374
 375         INIT_WORK(&sess->free_work, qlt_free_session_done);
 376         schedule_work(&sess->free_work);
 377 }
 378 EXPORT_SYMBOL(qlt_unreg_sess);
 379
 380 /* ha->hardware_lock supposed to be held on entry */
 381 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 382 {
 383         struct qla_hw_data *ha = vha->hw;
 384         struct qla_tgt_sess *sess = NULL;
 385         uint32_t unpacked_lun, lun = 0;
 386         uint16_t loop_id;
 387         int res = 0;
 388         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 389         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 390
 391         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 392         if (loop_id == 0xFFFF) {
 393 #if 0 /* FIXME: Re-enable Global event handling.. */
 394                 /* Global event */
 395                 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
 396                 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
 397                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 398                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 399                             typeof(*sess), sess_list_entry);
 400                         switch (mcmd) {
 401                         case QLA_TGT_NEXUS_LOSS_SESS:
 402                                 mcmd = QLA_TGT_NEXUS_LOSS;
 403                                 break;
 404                         case QLA_TGT_ABORT_ALL_SESS:
 405                                 mcmd = QLA_TGT_ABORT_ALL;
 406                                 break;
 407                         case QLA_TGT_NEXUS_LOSS:
 408                         case QLA_TGT_ABORT_ALL:
 409                                 break;
 410                         default:
 411                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 412                                     "qla_target(%d): Not allowed "
 413                                     "command %x in %s", vha->vp_idx,
 414                                     mcmd, __func__);
 415                                 sess = NULL;
 416                                 break;
 417                         }
 418                 } else
 419                         sess = NULL;
 420 #endif
 421         } else {
 422                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 423         }
 424
 425         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 426             "Using sess for qla_tgt_reset: %p\n", sess);
 427         if (!sess) {
 428                 res = -ESRCH;
 429                 return res;
 430         }
 431
 432         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 433             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 434             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 435             mcmd, loop_id);
 436
 437         lun = a->u.isp24.fcp_cmnd.lun;
 438         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 439
 440         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 441             iocb, QLA24XX_MGMT_SEND_NACK);
 442 }
 443
 444 /* ha->hardware_lock supposed to be held on entry */
 445 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 446         bool immediate)
 447 {
 448         struct qla_tgt *tgt = sess->tgt;
 449         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 450
 451         if (sess->deleted)
 452                 return;
 453
 454         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 455             "Scheduling sess %p for deletion\n", sess);
 456         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 457         sess->deleted = 1;
 458
 459         if (immediate)
 460                 dev_loss_tmo = 0;
 461
 462         sess->expires = jiffies + dev_loss_tmo * HZ;
 463
 464         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 465             "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
 466             "deletion in %u secs (expires: %lu) immed: %d\n",
 467             sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
 468             sess->expires, immediate);
 469
 470         if (immediate)
 471                 schedule_delayed_work(&tgt->sess_del_work, 0);
 472         else
 473                 schedule_delayed_work(&tgt->sess_del_work,
 474                     sess->expires - jiffies);
 475 }
 476
 477 /* ha->hardware_lock supposed to be held on entry */
 478 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
 479 {
 480         struct qla_tgt_sess *sess;
 481
 482         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 483                 qlt_schedule_sess_for_deletion(sess, true);
 484
 485         /* At this point tgt could be already dead */
 486 }
 487
 488 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 489         uint16_t *loop_id)
 490 {
 491         struct qla_hw_data *ha = vha->hw;
 492         dma_addr_t gid_list_dma;
 493         struct gid_list_info *gid_list;
 494         char *id_iter;
 495         int res, rc, i;
 496         uint16_t entries;
 497
 498         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 499             &gid_list_dma, GFP_KERNEL);
 500         if (!gid_list) {
 501                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 502                     "qla_target(%d): DMA Alloc failed of %u\n",
 503                     vha->vp_idx, qla2x00_gid_list_size(ha));
 504                 return -ENOMEM;
 505         }
 506
 507         /* Get list of logged in devices */
 508         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 509         if (rc != QLA_SUCCESS) {
 510                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 511                     "qla_target(%d): get_id_list() failed: %x\n",
 512                     vha->vp_idx, rc);
 513                 res = -1;
 514                 goto out_free_id_list;
 515         }
 516
 517         id_iter = (char *)gid_list;
 518         res = -1;
 519         for (i = 0; i < entries; i++) {
 520                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 521                 if ((gid->al_pa == s_id[2]) &&
 522                     (gid->area == s_id[1]) &&
 523                     (gid->domain == s_id[0])) {
 524                         *loop_id = le16_to_cpu(gid->loop_id);
 525                         res = 0;
 526                         break;
 527                 }
 528                 id_iter += ha->gid_list_info_size;
 529         }
 530
 531 out_free_id_list:
 532         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 533             gid_list, gid_list_dma);
 534         return res;
 535 }
 536
 537 /* ha->hardware_lock supposed to be held on entry */
 538 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 539 {
 540         BUG_ON(!sess->deleted);
 541
 542         list_del(&sess->del_list_entry);
 543         sess->deleted = 0;
 544 }
 545
 546 static void qlt_del_sess_work_fn(struct delayed_work *work)
 547 {
 548         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 549             sess_del_work);
 550         struct scsi_qla_host *vha = tgt->vha;
 551         struct qla_hw_data *ha = vha->hw;
 552         struct qla_tgt_sess *sess;
 553         unsigned long flags, elapsed;
 554
 555         spin_lock_irqsave(&ha->hardware_lock, flags);
 556         while (!list_empty(&tgt->del_sess_list)) {
 557                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 558                     del_list_entry);
 559                 elapsed = jiffies;
 560                 if (time_after_eq(elapsed, sess->expires)) {
 561                         qlt_undelete_sess(sess);
 562
 563                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 564                             "Timeout: sess %p about to be deleted\n",
 565                             sess);
 566                         ha->tgt.tgt_ops->shutdown_sess(sess);
 567                         ha->tgt.tgt_ops->put_sess(sess);
 568                 } else {
 569                         schedule_delayed_work(&tgt->sess_del_work,
 570                             sess->expires - elapsed);
 571                         break;
 572                 }
 573         }
 574         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 575 }
 576
 577 /*
 578  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 579  * Caller must put it.
 580  */
 581 static struct qla_tgt_sess *qlt_create_sess(
 582         struct scsi_qla_host *vha,
 583         fc_port_t *fcport,
 584         bool local)
 585 {
 586         struct qla_hw_data *ha = vha->hw;
 587         struct qla_tgt_sess *sess;
 588         unsigned long flags;
 589         unsigned char be_sid[3];
 590
 591         /* Check to avoid double sessions */
 592         spin_lock_irqsave(&ha->hardware_lock, flags);
 593         list_for_each_entry(sess, &ha->tgt.qla_tgt->sess_list,
 594                                 sess_list_entry) {
 595                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 596                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 597                             "Double sess %p found (s_id %x:%x:%x, "
 598                             "loop_id %d), updating to d_id %x:%x:%x, "
 599                             "loop_id %d", sess, sess->s_id.b.domain,
 600                             sess->s_id.b.al_pa, sess->s_id.b.area,
 601                             sess->loop_id, fcport->d_id.b.domain,
 602                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 603                             fcport->loop_id);
 604
 605                         if (sess->deleted)
 606                                 qlt_undelete_sess(sess);
 607
 608                         kref_get(&sess->se_sess->sess_kref);
 609                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 610                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 611
 612                         if (sess->local && !local)
 613                                 sess->local = 0;
 614                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 615
 616                         return sess;
 617                 }
 618         }
 619         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 620
 621         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 622         if (!sess) {
 623                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 624                     "qla_target(%u): session allocation failed, all commands "
 625                     "from port %8phC will be refused", vha->vp_idx,
 626                     fcport->port_name);
 627
 628                 return NULL;
 629         }
 630         sess->tgt = ha->tgt.qla_tgt;
 631         sess->vha = vha;
 632         sess->s_id = fcport->d_id;
 633         sess->loop_id = fcport->loop_id;
 634         sess->local = local;
 635
 636         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 637             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 638             sess, ha->tgt.qla_tgt);
 639
 640         be_sid[0] = sess->s_id.b.domain;
 641         be_sid[1] = sess->s_id.b.area;
 642         be_sid[2] = sess->s_id.b.al_pa;
 643         /*
 644          * Determine if this fc_port->port_name is allowed to access
 645          * target mode using explict NodeACLs+MappedLUNs, or using
 646          * TPG demo mode.  If this is successful a target mode FC nexus
 647          * is created.
 648          */
 649         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 650             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 651                 kfree(sess);
 652                 return NULL;
 653         }
 654         /*
 655          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 656          * access across ->hardware_lock reaquire.
 657          */
 658         kref_get(&sess->se_sess->sess_kref);
 659
 660         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 661         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 662         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 663
 664         spin_lock_irqsave(&ha->hardware_lock, flags);
 665         list_add_tail(&sess->sess_list_entry, &ha->tgt.qla_tgt->sess_list);
 666         ha->tgt.qla_tgt->sess_count++;
 667         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 668
 669         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 670             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 671             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 672             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 673             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 674             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 675
 676         return sess;
 677 }
 678
 679 /*
 680  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 681  */
 682 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 683 {
 684         struct qla_hw_data *ha = vha->hw;
 685         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 686         struct qla_tgt_sess *sess;
 687         unsigned long flags;
 688
 689         if (!vha->hw->tgt.tgt_ops)
 690                 return;
 691
 692         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 693                 return;
 694
 695         spin_lock_irqsave(&ha->hardware_lock, flags);
 696         if (tgt->tgt_stop) {
 697                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 698                 return;
 699         }
 700         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 701         if (!sess) {
 702                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 703
 704                 mutex_lock(&ha->tgt.tgt_mutex);
 705                 sess = qlt_create_sess(vha, fcport, false);
 706                 mutex_unlock(&ha->tgt.tgt_mutex);
 707
 708                 spin_lock_irqsave(&ha->hardware_lock, flags);
 709         } else {
 710                 kref_get(&sess->se_sess->sess_kref);
 711
 712                 if (sess->deleted) {
 713                         qlt_undelete_sess(sess);
 714
 715                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 716                             "qla_target(%u): %ssession for port %8phC "
 717                             "(loop ID %d) reappeared\n", vha->vp_idx,
 718                             sess->local ? "local " : "", sess->port_name,
 719                             sess->loop_id);
 720
 721                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 722                             "Reappeared sess %p\n", sess);
 723                 }
 724                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 725                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 726         }
 727
 728         if (sess && sess->local) {
 729                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 730                     "qla_target(%u): local session for "
 731                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 732                     fcport->port_name, sess->loop_id);
 733                 sess->local = 0;
 734         }
 735         ha->tgt.tgt_ops->put_sess(sess);
 736         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 737 }
 738
 739 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 740 {
 741         struct qla_hw_data *ha = vha->hw;
 742         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 743         struct qla_tgt_sess *sess;
 744         unsigned long flags;
 745
 746         if (!vha->hw->tgt.tgt_ops)
 747                 return;
 748
 749         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 750                 return;
 751
 752         spin_lock_irqsave(&ha->hardware_lock, flags);
 753         if (tgt->tgt_stop) {
 754                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 755                 return;
 756         }
 757         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 758         if (!sess) {
 759                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 760                 return;
 761         }
 762
 763         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 764
 765         sess->local = 1;
 766         qlt_schedule_sess_for_deletion(sess, false);
 767         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 768 }
 769
 770 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 771 {
 772         struct qla_hw_data *ha = tgt->ha;
 773         unsigned long flags;
 774         int res;
 775         /*
 776          * We need to protect against race, when tgt is freed before or
 777          * inside wake_up()
 778          */
 779         spin_lock_irqsave(&ha->hardware_lock, flags);
 780         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 781             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 782             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 783         res = (tgt->sess_count == 0);
 784         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 785
 786         return res;
 787 }
 788
 789 /* Called by tcm_qla2xxx configfs code */
 790 void qlt_stop_phase1(struct qla_tgt *tgt)
 791 {
 792         struct scsi_qla_host *vha = tgt->vha;
 793         struct qla_hw_data *ha = tgt->ha;
 794         unsigned long flags;
 795
 796         if (tgt->tgt_stop || tgt->tgt_stopped) {
 797                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 798                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 799                 dump_stack();
 800                 return;
 801         }
 802
 803         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 804             vha->host_no, vha);
 805         /*
 806          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 807          * Lock is needed, because we still can get an incoming packet.
 808          */
 809         mutex_lock(&ha->tgt.tgt_mutex);
 810         spin_lock_irqsave(&ha->hardware_lock, flags);
 811         tgt->tgt_stop = 1;
 812         qlt_clear_tgt_db(tgt, true);
 813         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 814         mutex_unlock(&ha->tgt.tgt_mutex);
 815
 816         flush_delayed_work(&tgt->sess_del_work);
 817
 818         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 819             "Waiting for sess works (tgt %p)", tgt);
 820         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 821         while (!list_empty(&tgt->sess_works_list)) {
 822                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 823                 flush_scheduled_work();
 824                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 825         }
 826         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 827
 828         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 829             "Waiting for tgt %p: list_empty(sess_list)=%d "
 830             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 831             tgt->sess_count);
 832
 833         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 834
 835         /* Big hammer */
 836         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 837                 qlt_disable_vha(vha);
 838
 839         /* Wait for sessions to clear out (just in case) */
 840         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 841 }
 842 EXPORT_SYMBOL(qlt_stop_phase1);
 843
 844 /* Called by tcm_qla2xxx configfs code */
 845 void qlt_stop_phase2(struct qla_tgt *tgt)
 846 {
 847         struct qla_hw_data *ha = tgt->ha;
 848         unsigned long flags;
 849
 850         if (tgt->tgt_stopped) {
 851                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f,
 852                     "Already in tgt->tgt_stopped state\n");
 853                 dump_stack();
 854                 return;
 855         }
 856
 857         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b,
 858             "Waiting for %d IRQ commands to complete (tgt %p)",
 859             tgt->irq_cmd_count, tgt);
 860
 861         mutex_lock(&ha->tgt.tgt_mutex);
 862         spin_lock_irqsave(&ha->hardware_lock, flags);
 863         while (tgt->irq_cmd_count != 0) {
 864                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 865                 udelay(2);
 866                 spin_lock_irqsave(&ha->hardware_lock, flags);
 867         }
 868         tgt->tgt_stop = 0;
 869         tgt->tgt_stopped = 1;
 870         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 871         mutex_unlock(&ha->tgt.tgt_mutex);
 872
 873         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished",
 874             tgt);
 875 }
 876 EXPORT_SYMBOL(qlt_stop_phase2);
 877
 878 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
 879 static void qlt_release(struct qla_tgt *tgt)
 880 {
 881         struct qla_hw_data *ha = tgt->ha;
 882
 883         if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
 884                 qlt_stop_phase2(tgt);
 885
 886         ha->tgt.qla_tgt = NULL;
 887
 888         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00d,
 889             "Release of tgt %p finished\n", tgt);
 890
 891         kfree(tgt);
 892 }
 893
 894 /* ha->hardware_lock supposed to be held on entry */
 895 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
 896         const void *param, unsigned int param_size)
 897 {
 898         struct qla_tgt_sess_work_param *prm;
 899         unsigned long flags;
 900
 901         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
 902         if (!prm) {
 903                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
 904                     "qla_target(%d): Unable to create session "
 905                     "work, command will be refused", 0);
 906                 return -ENOMEM;
 907         }
 908
 909         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
 910             "Scheduling work (type %d, prm %p)"
 911             " to find session for param %p (size %d, tgt %p)\n",
 912             type, prm, param, param_size, tgt);
 913
 914         prm->type = type;
 915         memcpy(&prm->tm_iocb, param, param_size);
 916
 917         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 918         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
 919         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 920
 921         schedule_work(&tgt->sess_work);
 922
 923         return 0;
 924 }
 925
 926 /*
 927  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 928  */
 929 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 930         struct imm_ntfy_from_isp *ntfy,
 931         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 932         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
 933 {
 934         struct qla_hw_data *ha = vha->hw;
 935         request_t *pkt;
 936         struct nack_to_isp *nack;
 937
 938         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
 939
 940         /* Send marker if required */
 941         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
 942                 return;
 943
 944         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
 945         if (!pkt) {
 946                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
 947                     "qla_target(%d): %s failed: unable to allocate "
 948                     "request packet\n", vha->vp_idx, __func__);
 949                 return;
 950         }
 951
 952         if (ha->tgt.qla_tgt != NULL)
 953                 ha->tgt.qla_tgt->notify_ack_expected++;
 954
 955         pkt->entry_type = NOTIFY_ACK_TYPE;
 956         pkt->entry_count = 1;
 957
 958         nack = (struct nack_to_isp *)pkt;
 959         nack->ox_id = ntfy->ox_id;
 960
 961         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
 962         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
 963                 nack->u.isp24.flags = ntfy->u.isp24.flags &
 964                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
 965         }
 966         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
 967         nack->u.isp24.status = ntfy->u.isp24.status;
 968         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
 969         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
 970         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
 971         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
 972         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
 973         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
 974         nack->u.isp24.srr_reject_code = srr_reject_code;
 975         nack->u.isp24.srr_reject_code_expl = srr_explan;
 976         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
 977
 978         ql_dbg(ql_dbg_tgt, vha, 0xe005,
 979             "qla_target(%d): Sending 24xx Notify Ack %d\n",
 980             vha->vp_idx, nack->u.isp24.status);
 981
 982         qla2x00_start_iocbs(vha, vha->req);
 983 }
 984
 985 /*
 986  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 987  */
 988 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
 989         struct abts_recv_from_24xx *abts, uint32_t status,
 990         bool ids_reversed)
 991 {
 992         struct qla_hw_data *ha = vha->hw;
 993         struct abts_resp_to_24xx *resp;
 994         uint32_t f_ctl;
 995         uint8_t *p;
 996
 997         ql_dbg(ql_dbg_tgt, vha, 0xe006,
 998             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
 999             ha, abts, status);
1000
1001         /* Send marker if required */
1002         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1003                 return;
1004
1005         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1006         if (!resp) {
1007                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1008                     "qla_target(%d): %s failed: unable to allocate "
1009                     "request packet", vha->vp_idx, __func__);
1010                 return;
1011         }
1012
1013         resp->entry_type = ABTS_RESP_24XX;
1014         resp->entry_count = 1;
1015         resp->nport_handle = abts->nport_handle;
1016         resp->vp_index = vha->vp_idx;
1017         resp->sof_type = abts->sof_type;
1018         resp->exchange_address = abts->exchange_address;
1019         resp->fcp_hdr_le = abts->fcp_hdr_le;
1020         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1021             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1022             F_CTL_SEQ_INITIATIVE);
1023         p = (uint8_t *)&f_ctl;
1024         resp->fcp_hdr_le.f_ctl[0] = *p++;
1025         resp->fcp_hdr_le.f_ctl[1] = *p++;
1026         resp->fcp_hdr_le.f_ctl[2] = *p;
1027         if (ids_reversed) {
1028                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1029                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1030                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1031                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1032                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1033                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1034         } else {
1035                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1036                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1037                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1038                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1039                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1040                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1041         }
1042         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1043         if (status == FCP_TMF_CMPL) {
1044                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1045                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1046                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1047                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1048                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1049                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1050         } else {
1051                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1052                 resp->payload.ba_rjt.reason_code =
1053                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1054                 /* Other bytes are zero */
1055         }
1056
1057         ha->tgt.qla_tgt->abts_resp_expected++;
1058
1059         qla2x00_start_iocbs(vha, vha->req);
1060 }
1061
1062 /*
1063  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1064  */
1065 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1066         struct abts_resp_from_24xx_fw *entry)
1067 {
1068         struct ctio7_to_24xx *ctio;
1069
1070         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1071             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1072         /* Send marker if required */
1073         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1074                 return;
1075
1076         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1077         if (ctio == NULL) {
1078                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1079                     "qla_target(%d): %s failed: unable to allocate "
1080                     "request packet\n", vha->vp_idx, __func__);
1081                 return;
1082         }
1083
1084         /*
1085          * We've got on entrance firmware's response on by us generated
1086          * ABTS response. So, in it ID fields are reversed.
1087          */
1088
1089         ctio->entry_type = CTIO_TYPE7;
1090         ctio->entry_count = 1;
1091         ctio->nport_handle = entry->nport_handle;
1092         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1093         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1094         ctio->vp_index = vha->vp_idx;
1095         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1096         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1097         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1098         ctio->exchange_addr = entry->exchange_addr_to_abort;
1099         ctio->u.status1.flags =
1100             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1101                 CTIO7_FLAGS_TERMINATE);
1102         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1103
1104         qla2x00_start_iocbs(vha, vha->req);
1105
1106         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1107             FCP_TMF_CMPL, true);
1108 }
1109
1110 /* ha->hardware_lock supposed to be held on entry */
1111 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1112         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1113 {
1114         struct qla_hw_data *ha = vha->hw;
1115         struct se_session *se_sess = sess->se_sess;
1116         struct qla_tgt_mgmt_cmd *mcmd;
1117         struct se_cmd *se_cmd;
1118         u32 lun = 0;
1119         int rc;
1120         bool found_lun = false;
1121
1122         spin_lock(&se_sess->sess_cmd_lock);
1123         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1124                 struct qla_tgt_cmd *cmd =
1125                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1126                 if (cmd->tag == abts->exchange_addr_to_abort) {
1127                         lun = cmd->unpacked_lun;
1128                         found_lun = true;
1129                         break;
1130                 }
1131         }
1132         spin_unlock(&se_sess->sess_cmd_lock);
1133
1134         if (!found_lun)
1135                 return -ENOENT;
1136
1137         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1138             "qla_target(%d): task abort (tag=%d)\n",
1139             vha->vp_idx, abts->exchange_addr_to_abort);
1140
1141         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1142         if (mcmd == NULL) {
1143                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1144                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1145                     vha->vp_idx, __func__);
1146                 return -ENOMEM;
1147         }
1148         memset(mcmd, 0, sizeof(*mcmd));
1149
1150         mcmd->sess = sess;
1151         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1152
1153         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1154             abts->exchange_addr_to_abort);
1155         if (rc != 0) {
1156                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1157                     "qla_target(%d):  tgt_ops->handle_tmr()"
1158                     " failed: %d", vha->vp_idx, rc);
1159                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1160                 return -EFAULT;
1161         }
1162
1163         return 0;
1164 }
1165
1166 /*
1167  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1168  */
1169 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1170         struct abts_recv_from_24xx *abts)
1171 {
1172         struct qla_hw_data *ha = vha->hw;
1173         struct qla_tgt_sess *sess;
1174         uint32_t tag = abts->exchange_addr_to_abort;
1175         uint8_t s_id[3];
1176         int rc;
1177
1178         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1179                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1180                     "qla_target(%d): ABTS: Abort Sequence not "
1181                     "supported\n", vha->vp_idx);
1182                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1183                 return;
1184         }
1185
1186         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1187                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1188                     "qla_target(%d): ABTS: Unknown Exchange "
1189                     "Address received\n", vha->vp_idx);
1190                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1191                 return;
1192         }
1193
1194         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1195             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1196             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1197             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1198             le32_to_cpu(abts->fcp_hdr_le.parameter));
1199
1200         s_id[0] = abts->fcp_hdr_le.s_id[2];
1201         s_id[1] = abts->fcp_hdr_le.s_id[1];
1202         s_id[2] = abts->fcp_hdr_le.s_id[0];
1203
1204         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1205         if (!sess) {
1206                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1207                     "qla_target(%d): task abort for non-existant session\n",
1208                     vha->vp_idx);
1209                 rc = qlt_sched_sess_work(ha->tgt.qla_tgt,
1210                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1211                 if (rc != 0) {
1212                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1213                             false);
1214                 }
1215                 return;
1216         }
1217
1218         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1219         if (rc != 0) {
1220                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1221                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1222                     vha->vp_idx, rc);
1223                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1224                 return;
1225         }
1226 }
1227
1228 /*
1229  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1230  */
1231 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1232         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1233 {
1234         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1235         struct ctio7_to_24xx *ctio;
1236
1237         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1238             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1239             ha, atio, resp_code);
1240
1241         /* Send marker if required */
1242         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1243                 return;
1244
1245         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1246         if (ctio == NULL) {
1247                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1248                     "qla_target(%d): %s failed: unable to allocate "
1249                     "request packet\n", ha->vp_idx, __func__);
1250                 return;
1251         }
1252
1253         ctio->entry_type = CTIO_TYPE7;
1254         ctio->entry_count = 1;
1255         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1256         ctio->nport_handle = mcmd->sess->loop_id;
1257         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1258         ctio->vp_index = ha->vp_idx;
1259         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1260         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1261         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1262         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1263         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1264             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1265                 CTIO7_FLAGS_SEND_STATUS);
1266         ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1267         ctio->u.status1.scsi_status =
1268             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1269         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1270         ctio->u.status1.sense_data[0] = resp_code;
1271
1272         qla2x00_start_iocbs(ha, ha->req);
1273 }
1274
1275 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1276 {
1277         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1278 }
1279 EXPORT_SYMBOL(qlt_free_mcmd);
1280
1281 /* callback from target fabric module code */
1282 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1283 {
1284         struct scsi_qla_host *vha = mcmd->sess->vha;
1285         struct qla_hw_data *ha = vha->hw;
1286         unsigned long flags;
1287
1288         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1289             "TM response mcmd (%p) status %#x state %#x",
1290             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1291
1292         spin_lock_irqsave(&ha->hardware_lock, flags);
1293         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1294                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1295                     0, 0, 0, 0, 0, 0);
1296         else {
1297                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1298                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1299                             mcmd->fc_tm_rsp, false);
1300                 else
1301                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1302                             mcmd->fc_tm_rsp);
1303         }
1304         /*
1305          * Make the callback for ->free_mcmd() to queue_work() and invoke
1306          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1307          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1308          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1309          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1310          * qlt_xmit_tm_rsp() returns here..
1311          */
1312         ha->tgt.tgt_ops->free_mcmd(mcmd);
1313         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1314 }
1315 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1316
1317 /* No locks */
1318 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1319 {
1320         struct qla_tgt_cmd *cmd = prm->cmd;
1321
1322         BUG_ON(cmd->sg_cnt == 0);
1323
1324         prm->sg = (struct scatterlist *)cmd->sg;
1325         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1326             cmd->sg_cnt, cmd->dma_data_direction);
1327         if (unlikely(prm->seg_cnt == 0))
1328                 goto out_err;
1329
1330         prm->cmd->sg_mapped = 1;
1331
1332         /*
1333          * If greater than four sg entries then we need to allocate
1334          * the continuation entries
1335          */
1336         if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1337                 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1338                     prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1339
1340         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1341             prm->seg_cnt, prm->req_cnt);
1342         return 0;
1343
1344 out_err:
1345         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1346             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1347             0, prm->cmd->sg_cnt);
1348         return -1;
1349 }
1350
1351 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1352         struct qla_tgt_cmd *cmd)
1353 {
1354         struct qla_hw_data *ha = vha->hw;
1355
1356         BUG_ON(!cmd->sg_mapped);
1357         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1358         cmd->sg_mapped = 0;
1359 }
1360
1361 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1362         uint32_t req_cnt)
1363 {
1364         struct qla_hw_data *ha = vha->hw;
1365         device_reg_t __iomem *reg = ha->iobase;
1366         uint32_t cnt;
1367
1368         if (vha->req->cnt < (req_cnt + 2)) {
1369                 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1370
1371                 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1372                     "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1373                     "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1374                     vha->req->ring_index, vha->req->cnt, req_cnt);
1375                 if  (vha->req->ring_index < cnt)
1376                         vha->req->cnt = cnt - vha->req->ring_index;
1377                 else
1378                         vha->req->cnt = vha->req->length -
1379                             (vha->req->ring_index - cnt);
1380         }
1381
1382         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1383                 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1384                     "qla_target(%d): There is no room in the "
1385                     "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1386                     "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1387                     vha->req->cnt, req_cnt);
1388                 return -EAGAIN;
1389         }
1390         vha->req->cnt -= req_cnt;
1391
1392         return 0;
1393 }
1394
1395 /*
1396  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1397  */
1398 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1399 {
1400         /* Adjust ring index. */
1401         vha->req->ring_index++;
1402         if (vha->req->ring_index == vha->req->length) {
1403                 vha->req->ring_index = 0;
1404                 vha->req->ring_ptr = vha->req->ring;
1405         } else {
1406                 vha->req->ring_ptr++;
1407         }
1408         return (cont_entry_t *)vha->req->ring_ptr;
1409 }
1410
1411 /* ha->hardware_lock supposed to be held on entry */
1412 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1413 {
1414         struct qla_hw_data *ha = vha->hw;
1415         uint32_t h;
1416
1417         h = ha->tgt.current_handle;
1418         /* always increment cmd handle */
1419         do {
1420                 ++h;
1421                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1422                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1423                 if (h == ha->tgt.current_handle) {
1424                         ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1425                             "qla_target(%d): Ran out of "
1426                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1427                         h = QLA_TGT_NULL_HANDLE;
1428                         break;
1429                 }
1430         } while ((h == QLA_TGT_NULL_HANDLE) ||
1431             (h == QLA_TGT_SKIP_HANDLE) ||
1432             (ha->tgt.cmds[h-1] != NULL));
1433
1434         if (h != QLA_TGT_NULL_HANDLE)
1435                 ha->tgt.current_handle = h;
1436
1437         return h;
1438 }
1439
1440 /* ha->hardware_lock supposed to be held on entry */
1441 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1442         struct scsi_qla_host *vha)
1443 {
1444         uint32_t h;
1445         struct ctio7_to_24xx *pkt;
1446         struct qla_hw_data *ha = vha->hw;
1447         struct atio_from_isp *atio = &prm->cmd->atio;
1448
1449         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1450         prm->pkt = pkt;
1451         memset(pkt, 0, sizeof(*pkt));
1452
1453         pkt->entry_type = CTIO_TYPE7;
1454         pkt->entry_count = (uint8_t)prm->req_cnt;
1455         pkt->vp_index = vha->vp_idx;
1456
1457         h = qlt_make_handle(vha);
1458         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1459                 /*
1460                  * CTIO type 7 from the firmware doesn't provide a way to
1461                  * know the initiator's LOOP ID, hence we can't find
1462                  * the session and, so, the command.
1463                  */
1464                 return -EAGAIN;
1465         } else
1466                 ha->tgt.cmds[h-1] = prm->cmd;
1467
1468         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1469         pkt->nport_handle = prm->cmd->loop_id;
1470         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1471         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1472         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1473         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1474         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1475         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1476         pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1477         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1478
1479         ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1480             "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1481             vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1482             le16_to_cpu(pkt->u.status0.ox_id));
1483         return 0;
1484 }
1485
1486 /*
1487  * ha->hardware_lock supposed to be held on entry. We have already made sure
1488  * that there is sufficient amount of request entries to not drop it.
1489  */
1490 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1491         struct scsi_qla_host *vha)
1492 {
1493         int cnt;
1494         uint32_t *dword_ptr;
1495         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1496
1497         /* Build continuation packets */
1498         while (prm->seg_cnt > 0) {
1499                 cont_a64_entry_t *cont_pkt64 =
1500                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1501
1502                 /*
1503                  * Make sure that from cont_pkt64 none of
1504                  * 64-bit specific fields used for 32-bit
1505                  * addressing. Cast to (cont_entry_t *) for
1506                  * that.
1507                  */
1508
1509                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1510
1511                 cont_pkt64->entry_count = 1;
1512                 cont_pkt64->sys_define = 0;
1513
1514                 if (enable_64bit_addressing) {
1515                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1516                         dword_ptr =
1517                             (uint32_t *)&cont_pkt64->dseg_0_address;
1518                 } else {
1519                         cont_pkt64->entry_type = CONTINUE_TYPE;
1520                         dword_ptr =
1521                             (uint32_t *)&((cont_entry_t *)
1522                                 cont_pkt64)->dseg_0_address;
1523                 }
1524
1525                 /* Load continuation entry data segments */
1526                 for (cnt = 0;
1527                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1528                     cnt++, prm->seg_cnt--) {
1529                         *dword_ptr++ =
1530                             cpu_to_le32(pci_dma_lo32
1531                                 (sg_dma_address(prm->sg)));
1532                         if (enable_64bit_addressing) {
1533                                 *dword_ptr++ =
1534                                     cpu_to_le32(pci_dma_hi32
1535                                         (sg_dma_address
1536                                         (prm->sg)));
1537                         }
1538                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1539
1540                         ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1541                             "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1542                             (long long unsigned int)
1543                             pci_dma_hi32(sg_dma_address(prm->sg)),
1544                             (long long unsigned int)
1545                             pci_dma_lo32(sg_dma_address(prm->sg)),
1546                             (int)sg_dma_len(prm->sg));
1547
1548                         prm->sg = sg_next(prm->sg);
1549                 }
1550         }
1551 }
1552
1553 /*
1554  * ha->hardware_lock supposed to be held on entry. We have already made sure
1555  * that there is sufficient amount of request entries to not drop it.
1556  */
1557 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1558         struct scsi_qla_host *vha)
1559 {
1560         int cnt;
1561         uint32_t *dword_ptr;
1562         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1563         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1564
1565         ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1566             "iocb->scsi_status=%x, iocb->flags=%x\n",
1567             le16_to_cpu(pkt24->u.status0.scsi_status),
1568             le16_to_cpu(pkt24->u.status0.flags));
1569
1570         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1571
1572         /* Setup packet address segment pointer */
1573         dword_ptr = pkt24->u.status0.dseg_0_address;
1574
1575         /* Set total data segment count */
1576         if (prm->seg_cnt)
1577                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1578
1579         if (prm->seg_cnt == 0) {
1580                 /* No data transfer */
1581                 *dword_ptr++ = 0;
1582                 *dword_ptr = 0;
1583                 return;
1584         }
1585
1586         /* If scatter gather */
1587         ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1588
1589         /* Load command entry data segments */
1590         for (cnt = 0;
1591             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1592             cnt++, prm->seg_cnt--) {
1593                 *dword_ptr++ =
1594                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1595                 if (enable_64bit_addressing) {
1596                         *dword_ptr++ =
1597                             cpu_to_le32(pci_dma_hi32(
1598                                 sg_dma_address(prm->sg)));
1599                 }
1600                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1601
1602                 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1603                     "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1604                     (long long unsigned int)pci_dma_hi32(sg_dma_address(
1605                     prm->sg)),
1606                     (long long unsigned int)pci_dma_lo32(sg_dma_address(
1607                     prm->sg)),
1608                     (int)sg_dma_len(prm->sg));
1609
1610                 prm->sg = sg_next(prm->sg);
1611         }
1612
1613         qlt_load_cont_data_segments(prm, vha);
1614 }
1615
1616 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1617 {
1618         return cmd->bufflen > 0;
1619 }
1620
1621 /*
1622  * Called without ha->hardware_lock held
1623  */
1624 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1625         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1626         uint32_t *full_req_cnt)
1627 {
1628         struct qla_tgt *tgt = cmd->tgt;
1629         struct scsi_qla_host *vha = tgt->vha;
1630         struct qla_hw_data *ha = vha->hw;
1631         struct se_cmd *se_cmd = &cmd->se_cmd;
1632
1633         if (unlikely(cmd->aborted)) {
1634                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1635                     "qla_target(%d): terminating exchange "
1636                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1637                     se_cmd, cmd->tag);
1638
1639                 cmd->state = QLA_TGT_STATE_ABORTED;
1640
1641                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1642
1643                 /* !! At this point cmd could be already freed !! */
1644                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1645         }
1646
1647         ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1648             vha->vp_idx, cmd->tag);
1649
1650         prm->cmd = cmd;
1651         prm->tgt = tgt;
1652         prm->rq_result = scsi_status;
1653         prm->sense_buffer = &cmd->sense_buffer[0];
1654         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1655         prm->sg = NULL;
1656         prm->seg_cnt = -1;
1657         prm->req_cnt = 1;
1658         prm->add_status_pkt = 0;
1659
1660         ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1661             prm->rq_result, xmit_type);
1662
1663         /* Send marker if required */
1664         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1665                 return -EFAULT;
1666
1667         ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1668
1669         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1670                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1671                         return -EAGAIN;
1672         }
1673
1674         *full_req_cnt = prm->req_cnt;
1675
1676         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1677                 prm->residual = se_cmd->residual_count;
1678                 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1679                     "Residual underflow: %d (tag %d, "
1680                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1681                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1682                     cmd->bufflen, prm->rq_result);
1683                 prm->rq_result |= SS_RESIDUAL_UNDER;
1684         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1685                 prm->residual = se_cmd->residual_count;
1686                 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1687                     "Residual overflow: %d (tag %d, "
1688                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1689                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1690                     cmd->bufflen, prm->rq_result);
1691                 prm->rq_result |= SS_RESIDUAL_OVER;
1692         }
1693
1694         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1695                 /*
1696                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1697                  * ignored in *xmit_response() below
1698                  */
1699                 if (qlt_has_data(cmd)) {
1700                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1701                             (IS_FWI2_CAPABLE(ha) &&
1702                             (prm->rq_result != 0))) {
1703                                 prm->add_status_pkt = 1;
1704                                 (*full_req_cnt)++;
1705                         }
1706                 }
1707         }
1708
1709         ql_dbg(ql_dbg_tgt, vha, 0xe016,
1710             "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1711             prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1712
1713         return 0;
1714 }
1715
1716 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1717         struct qla_tgt_cmd *cmd, int sending_sense)
1718 {
1719         if (ha->tgt.enable_class_2)
1720                 return 0;
1721
1722         if (sending_sense)
1723                 return cmd->conf_compl_supported;
1724         else
1725                 return ha->tgt.enable_explicit_conf &&
1726                     cmd->conf_compl_supported;
1727 }
1728
1729 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1730 /*
1731  *  Original taken from the XFS code
1732  */
1733 static unsigned long qlt_srr_random(void)
1734 {
1735         static int Inited;
1736         static unsigned long RandomValue;
1737         static DEFINE_SPINLOCK(lock);
1738         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1739         register long rv;
1740         register long lo;
1741         register long hi;
1742         unsigned long flags;
1743
1744         spin_lock_irqsave(&lock, flags);
1745         if (!Inited) {
1746                 RandomValue = jiffies;
1747                 Inited = 1;
1748         }
1749         rv = RandomValue;
1750         hi = rv / 127773;
1751         lo = rv % 127773;
1752         rv = 16807 * lo - 2836 * hi;
1753         if (rv <= 0)
1754                 rv += 2147483647;
1755         RandomValue = rv;
1756         spin_unlock_irqrestore(&lock, flags);
1757         return rv;
1758 }
1759
1760 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1761 {
1762 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1763         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1764             == 50) {
1765                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1766                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1767                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1768         }
1769 #endif
1770         /*
1771          * It's currently not possible to simulate SRRs for FCP_WRITE without
1772          * a physical link layer failure, so don't even try here..
1773          */
1774         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1775                 return;
1776
1777         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1778             ((qlt_srr_random() % 100) == 20)) {
1779                 int i, leave = 0;
1780                 unsigned int tot_len = 0;
1781
1782                 while (leave == 0)
1783                         leave = qlt_srr_random() % cmd->sg_cnt;
1784
1785                 for (i = 0; i < leave; i++)
1786                         tot_len += cmd->sg[i].length;
1787
1788                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1789                     "Cutting cmd %p (tag %d) buffer"
1790                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1791                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1792                     cmd->bufflen, cmd->sg_cnt);
1793
1794                 cmd->bufflen = tot_len;
1795                 cmd->sg_cnt = leave;
1796         }
1797
1798         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1799                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1800
1801                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1802                     "Cutting cmd %p (tag %d) buffer head "
1803                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1804                     cmd->bufflen);
1805                 if (offset == 0)
1806                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1807                 else if (qlt_set_data_offset(cmd, offset)) {
1808                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1809                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1810                 }
1811         }
1812 }
1813 #else
1814 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1815 {}
1816 #endif
1817
1818 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1819         struct qla_tgt_prm *prm)
1820 {
1821         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1822             (uint32_t)sizeof(ctio->u.status1.sense_data));
1823         ctio->u.status0.flags |=
1824             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1825         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1826                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1827                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1828                     CTIO7_FLAGS_CONFORM_REQ);
1829         }
1830         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1831         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1832         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1833                 int i;
1834
1835                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1836                         if (prm->cmd->se_cmd.scsi_status != 0) {
1837                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1838                                     "Skipping EXPLICIT_CONFORM and "
1839                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1840                                     "non GOOD status\n");
1841                                 goto skip_explict_conf;
1842                         }
1843                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1844                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1845                             CTIO7_FLAGS_CONFORM_REQ);
1846                 }
1847 skip_explict_conf:
1848                 ctio->u.status1.flags &=
1849                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1850                 ctio->u.status1.flags |=
1851                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1852                 ctio->u.status1.scsi_status |=
1853                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1854                 ctio->u.status1.sense_length =
1855                     cpu_to_le16(prm->sense_buffer_len);
1856                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1857                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1858                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1859 #if 0
1860                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1861                         static int q;
1862                         if (q < 10) {
1863                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1864                                     "qla_target(%d): %d bytes of sense "
1865                                     "lost", prm->tgt->ha->vp_idx,
1866                                     prm->sense_buffer_len % 4);
1867                                 q++;
1868                         }
1869                 }
1870 #endif
1871         } else {
1872                 ctio->u.status1.flags &=
1873                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1874                 ctio->u.status1.flags |=
1875                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1876                 ctio->u.status1.sense_length = 0;
1877                 memset(ctio->u.status1.sense_data, 0,
1878                     sizeof(ctio->u.status1.sense_data));
1879         }
1880
1881         /* Sense with len > 24, is it possible ??? */
1882 }
1883
1884 /*
1885  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
1886  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
1887  */
1888 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
1889         uint8_t scsi_status)
1890 {
1891         struct scsi_qla_host *vha = cmd->vha;
1892         struct qla_hw_data *ha = vha->hw;
1893         struct ctio7_to_24xx *pkt;
1894         struct qla_tgt_prm prm;
1895         uint32_t full_req_cnt = 0;
1896         unsigned long flags = 0;
1897         int res;
1898
1899         memset(&prm, 0, sizeof(prm));
1900         qlt_check_srr_debug(cmd, &xmit_type);
1901
1902         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
1903             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
1904             "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
1905             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
1906
1907         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
1908             &full_req_cnt);
1909         if (unlikely(res != 0)) {
1910                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
1911                         return 0;
1912
1913                 return res;
1914         }
1915
1916         spin_lock_irqsave(&ha->hardware_lock, flags);
1917
1918         /* Does F/W have an IOCBs for this request */
1919         res = qlt_check_reserve_free_req(vha, full_req_cnt);
1920         if (unlikely(res))
1921                 goto out_unmap_unlock;
1922
1923         res = qlt_24xx_build_ctio_pkt(&prm, vha);
1924         if (unlikely(res != 0))
1925                 goto out_unmap_unlock;
1926
1927
1928         pkt = (struct ctio7_to_24xx *)prm.pkt;
1929
1930         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
1931                 pkt->u.status0.flags |=
1932                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
1933                         CTIO7_FLAGS_STATUS_MODE_0);
1934
1935                 qlt_load_data_segments(&prm, vha);
1936
1937                 if (prm.add_status_pkt == 0) {
1938                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1939                                 pkt->u.status0.scsi_status =
1940                                     cpu_to_le16(prm.rq_result);
1941                                 pkt->u.status0.residual =
1942                                     cpu_to_le32(prm.residual);
1943                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
1944                                     CTIO7_FLAGS_SEND_STATUS);
1945                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
1946                                         pkt->u.status0.flags |=
1947                                             __constant_cpu_to_le16(
1948                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
1949                                                 CTIO7_FLAGS_CONFORM_REQ);
1950                                 }
1951                         }
1952
1953                 } else {
1954                         /*
1955                          * We have already made sure that there is sufficient
1956                          * amount of request entries to not drop HW lock in
1957                          * req_pkt().
1958                          */
1959                         struct ctio7_to_24xx *ctio =
1960                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
1961
1962                         ql_dbg(ql_dbg_tgt, vha, 0xe019,
1963                             "Building additional status packet\n");
1964
1965                         memcpy(ctio, pkt, sizeof(*ctio));
1966                         ctio->entry_count = 1;
1967                         ctio->dseg_count = 0;
1968                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
1969                             CTIO7_FLAGS_DATA_IN);
1970
1971                         /* Real finish is ctio_m1's finish */
1972                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
1973                         pkt->u.status0.flags |= __constant_cpu_to_le16(
1974                             CTIO7_FLAGS_DONT_RET_CTIO);
1975                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
1976                             &prm);
1977                         pr_debug("Status CTIO7: %p\n", ctio);
1978                 }
1979         } else
1980                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
1981
1982
1983         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
1984
1985         ql_dbg(ql_dbg_tgt, vha, 0xe01a,
1986             "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
1987             pkt, scsi_status);
1988
1989         qla2x00_start_iocbs(vha, vha->req);
1990         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1991
1992         return 0;
1993
1994 out_unmap_unlock:
1995         if (cmd->sg_mapped)
1996                 qlt_unmap_sg(vha, cmd);
1997         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1998
1999         return res;
2000 }
2001 EXPORT_SYMBOL(qlt_xmit_response);
2002
2003 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2004 {
2005         struct ctio7_to_24xx *pkt;
2006         struct scsi_qla_host *vha = cmd->vha;
2007         struct qla_hw_data *ha = vha->hw;
2008         struct qla_tgt *tgt = cmd->tgt;
2009         struct qla_tgt_prm prm;
2010         unsigned long flags;
2011         int res = 0;
2012
2013         memset(&prm, 0, sizeof(prm));
2014         prm.cmd = cmd;
2015         prm.tgt = tgt;
2016         prm.sg = NULL;
2017         prm.req_cnt = 1;
2018
2019         /* Send marker if required */
2020         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2021                 return -EIO;
2022
2023         ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2024             (int)vha->vp_idx);
2025
2026         /* Calculate number of entries and segments required */
2027         if (qlt_pci_map_calc_cnt(&prm) != 0)
2028                 return -EAGAIN;
2029
2030         spin_lock_irqsave(&ha->hardware_lock, flags);
2031
2032         /* Does F/W have an IOCBs for this request */
2033         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2034         if (res != 0)
2035                 goto out_unlock_free_unmap;
2036
2037         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2038         if (unlikely(res != 0))
2039                 goto out_unlock_free_unmap;
2040         pkt = (struct ctio7_to_24xx *)prm.pkt;
2041         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2042             CTIO7_FLAGS_STATUS_MODE_0);
2043         qlt_load_data_segments(&prm, vha);
2044
2045         cmd->state = QLA_TGT_STATE_NEED_DATA;
2046
2047         qla2x00_start_iocbs(vha, vha->req);
2048         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2049
2050         return res;
2051
2052 out_unlock_free_unmap:
2053         if (cmd->sg_mapped)
2054                 qlt_unmap_sg(vha, cmd);
2055         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2056
2057         return res;
2058 }
2059 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2060
2061 /* If hardware_lock held on entry, might drop it, then reaquire */
2062 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2063 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2064         struct qla_tgt_cmd *cmd,
2065         struct atio_from_isp *atio)
2066 {
2067         struct ctio7_to_24xx *ctio24;
2068         struct qla_hw_data *ha = vha->hw;
2069         request_t *pkt;
2070         int ret = 0;
2071
2072         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2073
2074         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2075         if (pkt == NULL) {
2076                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2077                     "qla_target(%d): %s failed: unable to allocate "
2078                     "request packet\n", vha->vp_idx, __func__);
2079                 return -ENOMEM;
2080         }
2081
2082         if (cmd != NULL) {
2083                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2084                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2085                             "qla_target(%d): Terminating cmd %p with "
2086                             "incorrect state %d\n", vha->vp_idx, cmd,
2087                             cmd->state);
2088                 } else
2089                         ret = 1;
2090         }
2091
2092         pkt->entry_count = 1;
2093         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2094
2095         ctio24 = (struct ctio7_to_24xx *)pkt;
2096         ctio24->entry_type = CTIO_TYPE7;
2097         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2098         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2099         ctio24->vp_index = vha->vp_idx;
2100         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2101         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2102         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2103         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2104         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2105             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2106                 CTIO7_FLAGS_TERMINATE);
2107         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2108
2109         /* Most likely, it isn't needed */
2110         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2111             &atio->u.isp24.fcp_cmnd.add_cdb[
2112             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2113         if (ctio24->u.status1.residual != 0)
2114                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2115
2116         qla2x00_start_iocbs(vha, vha->req);
2117         return ret;
2118 }
2119
2120 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2121         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2122 {
2123         unsigned long flags;
2124         int rc;
2125
2126         if (qlt_issue_marker(vha, ha_locked) < 0)
2127                 return;
2128
2129         if (ha_locked) {
2130                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2131                 goto done;
2132         }
2133         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2134         rc = __qlt_send_term_exchange(vha, cmd, atio);
2135         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2136 done:
2137         if (rc == 1) {
2138                 if (!ha_locked && !in_interrupt())
2139                         msleep(250); /* just in case */
2140
2141                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2142         }
2143 }
2144
2145 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2146 {
2147         BUG_ON(cmd->sg_mapped);
2148
2149         if (unlikely(cmd->free_sg))
2150                 kfree(cmd->sg);
2151         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2152 }
2153 EXPORT_SYMBOL(qlt_free_cmd);
2154
2155 /* ha->hardware_lock supposed to be held on entry */
2156 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2157         struct qla_tgt_cmd *cmd, void *ctio)
2158 {
2159         struct qla_tgt_srr_ctio *sc;
2160         struct qla_hw_data *ha = vha->hw;
2161         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2162         struct qla_tgt_srr_imm *imm;
2163
2164         tgt->ctio_srr_id++;
2165
2166         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2167             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2168
2169         if (!ctio) {
2170                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2171                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2172                     vha->vp_idx);
2173                 return -EINVAL;
2174         }
2175
2176         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2177         if (sc != NULL) {
2178                 sc->cmd = cmd;
2179                 /* IRQ is already OFF */
2180                 spin_lock(&tgt->srr_lock);
2181                 sc->srr_id = tgt->ctio_srr_id;
2182                 list_add_tail(&sc->srr_list_entry,
2183                     &tgt->srr_ctio_list);
2184                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2185                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2186                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2187                         int found = 0;
2188                         list_for_each_entry(imm, &tgt->srr_imm_list,
2189                             srr_list_entry) {
2190                                 if (imm->srr_id == sc->srr_id) {
2191                                         found = 1;
2192                                         break;
2193                                 }
2194                         }
2195                         if (found) {
2196                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2197                                     "Scheduling srr work\n");
2198                                 schedule_work(&tgt->srr_work);
2199                         } else {
2200                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2201                                     "qla_target(%d): imm_srr_id "
2202                                     "== ctio_srr_id (%d), but there is no "
2203                                     "corresponding SRR IMM, deleting CTIO "
2204                                     "SRR %p\n", vha->vp_idx,
2205                                     tgt->ctio_srr_id, sc);
2206                                 list_del(&sc->srr_list_entry);
2207                                 spin_unlock(&tgt->srr_lock);
2208
2209                                 kfree(sc);
2210                                 return -EINVAL;
2211                         }
2212                 }
2213                 spin_unlock(&tgt->srr_lock);
2214         } else {
2215                 struct qla_tgt_srr_imm *ti;
2216
2217                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2218                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2219                     vha->vp_idx);
2220                 spin_lock(&tgt->srr_lock);
2221                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2222                     srr_list_entry) {
2223                         if (imm->srr_id == tgt->ctio_srr_id) {
2224                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2225                                     "IMM SRR %p deleted (id %d)\n",
2226                                     imm, imm->srr_id);
2227                                 list_del(&imm->srr_list_entry);
2228                                 qlt_reject_free_srr_imm(vha, imm, 1);
2229                         }
2230                 }
2231                 spin_unlock(&tgt->srr_lock);
2232
2233                 return -ENOMEM;
2234         }
2235
2236         return 0;
2237 }
2238
2239 /*
2240  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2241  */
2242 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2243         struct qla_tgt_cmd *cmd, uint32_t status)
2244 {
2245         int term = 0;
2246
2247         if (ctio != NULL) {
2248                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2249                 term = !(c->flags &
2250                     __constant_cpu_to_le16(OF_TERM_EXCH));
2251         } else
2252                 term = 1;
2253
2254         if (term)
2255                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2256
2257         return term;
2258 }
2259
2260 /* ha->hardware_lock supposed to be held on entry */
2261 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2262         uint32_t handle)
2263 {
2264         struct qla_hw_data *ha = vha->hw;
2265
2266         handle--;
2267         if (ha->tgt.cmds[handle] != NULL) {
2268                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2269                 ha->tgt.cmds[handle] = NULL;
2270                 return cmd;
2271         } else
2272                 return NULL;
2273 }
2274
2275 /* ha->hardware_lock supposed to be held on entry */
2276 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2277         uint32_t handle, void *ctio)
2278 {
2279         struct qla_tgt_cmd *cmd = NULL;
2280
2281         /* Clear out internal marks */
2282         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2283             CTIO_INTERMEDIATE_HANDLE_MARK);
2284
2285         if (handle != QLA_TGT_NULL_HANDLE) {
2286                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2287                         ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2288                             "SKIP_HANDLE CTIO\n");
2289                         return NULL;
2290                 }
2291                 /* handle-1 is actually used */
2292                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2293                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2294                             "qla_target(%d): Wrong handle %x received\n",
2295                             vha->vp_idx, handle);
2296                         return NULL;
2297                 }
2298                 cmd = qlt_get_cmd(vha, handle);
2299                 if (unlikely(cmd == NULL)) {
2300                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2301                             "qla_target(%d): Suspicious: unable to "
2302                             "find the command with handle %x\n", vha->vp_idx,
2303                             handle);
2304                         return NULL;
2305                 }
2306         } else if (ctio != NULL) {
2307                 /* We can't get loop ID from CTIO7 */
2308                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2309                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2310                     "support NULL handles\n", vha->vp_idx);
2311                 return NULL;
2312         }
2313
2314         return cmd;
2315 }
2316
2317 /*
2318  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2319  */
2320 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2321         uint32_t status, void *ctio)
2322 {
2323         struct qla_hw_data *ha = vha->hw;
2324         struct se_cmd *se_cmd;
2325         struct target_core_fabric_ops *tfo;
2326         struct qla_tgt_cmd *cmd;
2327
2328         ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2329             "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2330             vha->vp_idx, ctio, status, handle);
2331
2332         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2333                 /* That could happen only in case of an error/reset/abort */
2334                 if (status != CTIO_SUCCESS) {
2335                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2336                             "Intermediate CTIO received"
2337                             " (status %x)\n", status);
2338                 }
2339                 return;
2340         }
2341
2342         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2343         if (cmd == NULL)
2344                 return;
2345
2346         se_cmd = &cmd->se_cmd;
2347         tfo = se_cmd->se_tfo;
2348
2349         if (cmd->sg_mapped)
2350                 qlt_unmap_sg(vha, cmd);
2351
2352         if (unlikely(status != CTIO_SUCCESS)) {
2353                 switch (status & 0xFFFF) {
2354                 case CTIO_LIP_RESET:
2355                 case CTIO_TARGET_RESET:
2356                 case CTIO_ABORTED:
2357                 case CTIO_TIMEOUT:
2358                 case CTIO_INVALID_RX_ID:
2359                         /* They are OK */
2360                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2361                             "qla_target(%d): CTIO with "
2362                             "status %#x received, state %x, se_cmd %p, "
2363                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2364                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2365                             status, cmd->state, se_cmd);
2366                         break;
2367
2368                 case CTIO_PORT_LOGGED_OUT:
2369                 case CTIO_PORT_UNAVAILABLE:
2370                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2371                             "qla_target(%d): CTIO with PORT LOGGED "
2372                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
2373                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
2374                             status, cmd->state, se_cmd);
2375                         break;
2376
2377                 case CTIO_SRR_RECEIVED:
2378                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2379                             "qla_target(%d): CTIO with SRR_RECEIVED"
2380                             " status %x received (state %x, se_cmd %p)\n",
2381                             vha->vp_idx, status, cmd->state, se_cmd);
2382                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2383                                 break;
2384                         else
2385                                 return;
2386
2387                 default:
2388                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2389                             "qla_target(%d): CTIO with error status "
2390                             "0x%x received (state %x, se_cmd %p\n",
2391                             vha->vp_idx, status, cmd->state, se_cmd);
2392                         break;
2393                 }
2394
2395                 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2396                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2397                                 return;
2398         }
2399
2400         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2401                 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2402         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2403                 int rx_status = 0;
2404
2405                 cmd->state = QLA_TGT_STATE_DATA_IN;
2406
2407                 if (unlikely(status != CTIO_SUCCESS))
2408                         rx_status = -EIO;
2409                 else
2410                         cmd->write_data_transferred = 1;
2411
2412                 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2413                     "Data received, context %x, rx_status %d\n",
2414                     0x0, rx_status);
2415
2416                 ha->tgt.tgt_ops->handle_data(cmd);
2417                 return;
2418         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2419                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2420                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2421         } else {
2422                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2423                     "qla_target(%d): A command in state (%d) should "
2424                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2425         }
2426
2427         if (unlikely(status != CTIO_SUCCESS)) {
2428                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2429                 dump_stack();
2430         }
2431
2432         ha->tgt.tgt_ops->free_cmd(cmd);
2433 }
2434
2435 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2436         uint8_t task_codes)
2437 {
2438         int fcp_task_attr;
2439
2440         switch (task_codes) {
2441         case ATIO_SIMPLE_QUEUE:
2442                 fcp_task_attr = MSG_SIMPLE_TAG;
2443                 break;
2444         case ATIO_HEAD_OF_QUEUE:
2445                 fcp_task_attr = MSG_HEAD_TAG;
2446                 break;
2447         case ATIO_ORDERED_QUEUE:
2448                 fcp_task_attr = MSG_ORDERED_TAG;
2449                 break;
2450         case ATIO_ACA_QUEUE:
2451                 fcp_task_attr = MSG_ACA_TAG;
2452                 break;
2453         case ATIO_UNTAGGED:
2454                 fcp_task_attr = MSG_SIMPLE_TAG;
2455                 break;
2456         default:
2457                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2458                     "qla_target: unknown task code %x, use ORDERED instead\n",
2459                     task_codes);
2460                 fcp_task_attr = MSG_ORDERED_TAG;
2461                 break;
2462         }
2463
2464         return fcp_task_attr;
2465 }
2466
2467 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2468                                         uint8_t *);
2469 /*
2470  * Process context for I/O path into tcm_qla2xxx code
2471  */
2472 static void qlt_do_work(struct work_struct *work)
2473 {
2474         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2475         scsi_qla_host_t *vha = cmd->vha;
2476         struct qla_hw_data *ha = vha->hw;
2477         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2478         struct qla_tgt_sess *sess = NULL;
2479         struct atio_from_isp *atio = &cmd->atio;
2480         unsigned char *cdb;
2481         unsigned long flags;
2482         uint32_t data_length;
2483         int ret, fcp_task_attr, data_dir, bidi = 0;
2484
2485         if (tgt->tgt_stop)
2486                 goto out_term;
2487
2488         spin_lock_irqsave(&ha->hardware_lock, flags);
2489         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2490             atio->u.isp24.fcp_hdr.s_id);
2491         /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2492         if (sess)
2493                 kref_get(&sess->se_sess->sess_kref);
2494         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2495
2496         if (unlikely(!sess)) {
2497                 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2498
2499                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2500                         "qla_target(%d): Unable to find wwn login"
2501                         " (s_id %x:%x:%x), trying to create it manually\n",
2502                         vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2503
2504                 if (atio->u.raw.entry_count > 1) {
2505                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2506                                 "Dropping multy entry cmd %p\n", cmd);
2507                         goto out_term;
2508                 }
2509
2510                 mutex_lock(&ha->tgt.tgt_mutex);
2511                 sess = qlt_make_local_sess(vha, s_id);
2512                 /* sess has an extra creation ref. */
2513                 mutex_unlock(&ha->tgt.tgt_mutex);
2514
2515                 if (!sess)
2516                         goto out_term;
2517         }
2518
2519         cmd->sess = sess;
2520         cmd->loop_id = sess->loop_id;
2521         cmd->conf_compl_supported = sess->conf_compl_supported;
2522
2523         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2524         cmd->tag = atio->u.isp24.exchange_addr;
2525         cmd->unpacked_lun = scsilun_to_int(
2526             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2527
2528         if (atio->u.isp24.fcp_cmnd.rddata &&
2529             atio->u.isp24.fcp_cmnd.wrdata) {
2530                 bidi = 1;
2531                 data_dir = DMA_TO_DEVICE;
2532         } else if (atio->u.isp24.fcp_cmnd.rddata)
2533                 data_dir = DMA_FROM_DEVICE;
2534         else if (atio->u.isp24.fcp_cmnd.wrdata)
2535                 data_dir = DMA_TO_DEVICE;
2536         else
2537                 data_dir = DMA_NONE;
2538
2539         fcp_task_attr = qlt_get_fcp_task_attr(vha,
2540             atio->u.isp24.fcp_cmnd.task_attr);
2541         data_length = be32_to_cpu(get_unaligned((uint32_t *)
2542             &atio->u.isp24.fcp_cmnd.add_cdb[
2543             atio->u.isp24.fcp_cmnd.add_cdb_len]));
2544
2545         ql_dbg(ql_dbg_tgt, vha, 0xe022,
2546             "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2547             cmd, cmd->unpacked_lun, cmd->tag);
2548
2549         ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2550             fcp_task_attr, data_dir, bidi);
2551         if (ret != 0)
2552                 goto out_term;
2553         /*
2554          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2555          */
2556         spin_lock_irqsave(&ha->hardware_lock, flags);
2557         ha->tgt.tgt_ops->put_sess(sess);
2558         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2559         return;
2560
2561 out_term:
2562         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2563         /*
2564          * cmd has not sent to target yet, so pass NULL as the second
2565          * argument to qlt_send_term_exchange() and free the memory here.
2566          */
2567         spin_lock_irqsave(&ha->hardware_lock, flags);
2568         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
2569         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2570         if (sess)
2571                 ha->tgt.tgt_ops->put_sess(sess);
2572         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2573 }
2574
2575 /* ha->hardware_lock supposed to be held on entry */
2576 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2577         struct atio_from_isp *atio)
2578 {
2579         struct qla_hw_data *ha = vha->hw;
2580         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2581         struct qla_tgt_cmd *cmd;
2582
2583         if (unlikely(tgt->tgt_stop)) {
2584                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2585                     "New command while device %p is shutting down\n", tgt);
2586                 return -EFAULT;
2587         }
2588
2589         cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2590         if (!cmd) {
2591                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2592                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2593                 return -ENOMEM;
2594         }
2595
2596         INIT_LIST_HEAD(&cmd->cmd_list);
2597
2598         memcpy(&cmd->atio, atio, sizeof(*atio));
2599         cmd->state = QLA_TGT_STATE_NEW;
2600         cmd->tgt = ha->tgt.qla_tgt;
2601         cmd->vha = vha;
2602
2603         INIT_WORK(&cmd->work, qlt_do_work);
2604         queue_work(qla_tgt_wq, &cmd->work);
2605         return 0;
2606
2607 }
2608
2609 /* ha->hardware_lock supposed to be held on entry */
2610 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2611         int fn, void *iocb, int flags)
2612 {
2613         struct scsi_qla_host *vha = sess->vha;
2614         struct qla_hw_data *ha = vha->hw;
2615         struct qla_tgt_mgmt_cmd *mcmd;
2616         int res;
2617         uint8_t tmr_func;
2618
2619         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2620         if (!mcmd) {
2621                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2622                     "qla_target(%d): Allocation of management "
2623                     "command failed, some commands and their data could "
2624                     "leak\n", vha->vp_idx);
2625                 return -ENOMEM;
2626         }
2627         memset(mcmd, 0, sizeof(*mcmd));
2628         mcmd->sess = sess;
2629
2630         if (iocb) {
2631                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2632                     sizeof(mcmd->orig_iocb.imm_ntfy));
2633         }
2634         mcmd->tmr_func = fn;
2635         mcmd->flags = flags;
2636
2637         switch (fn) {
2638         case QLA_TGT_CLEAR_ACA:
2639                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2640                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2641                 tmr_func = TMR_CLEAR_ACA;
2642                 break;
2643
2644         case QLA_TGT_TARGET_RESET:
2645                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2646                     "qla_target(%d): TARGET_RESET received\n",
2647                     sess->vha->vp_idx);
2648                 tmr_func = TMR_TARGET_WARM_RESET;
2649                 break;
2650
2651         case QLA_TGT_LUN_RESET:
2652                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2653                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2654                 tmr_func = TMR_LUN_RESET;
2655                 break;
2656
2657         case QLA_TGT_CLEAR_TS:
2658                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2659                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2660                 tmr_func = TMR_CLEAR_TASK_SET;
2661                 break;
2662
2663         case QLA_TGT_ABORT_TS:
2664                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2665                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2666                 tmr_func = TMR_ABORT_TASK_SET;
2667                 break;
2668 #if 0
2669         case QLA_TGT_ABORT_ALL:
2670                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2671                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2672                     sess->vha->vp_idx);
2673                 tmr_func = 0;
2674                 break;
2675
2676         case QLA_TGT_ABORT_ALL_SESS:
2677                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2678                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2679                     sess->vha->vp_idx);
2680                 tmr_func = 0;
2681                 break;
2682
2683         case QLA_TGT_NEXUS_LOSS_SESS:
2684                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2685                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2686                     sess->vha->vp_idx);
2687                 tmr_func = 0;
2688                 break;
2689
2690         case QLA_TGT_NEXUS_LOSS:
2691                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2692                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2693                 tmr_func = 0;
2694                 break;
2695 #endif
2696         default:
2697                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2698                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2699                     sess->vha->vp_idx, fn);
2700                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2701                 return -ENOSYS;
2702         }
2703
2704         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2705         if (res != 0) {
2706                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2707                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2708                     sess->vha->vp_idx, res);
2709                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2710                 return -EFAULT;
2711         }
2712
2713         return 0;
2714 }
2715
2716 /* ha->hardware_lock supposed to be held on entry */
2717 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2718 {
2719         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2720         struct qla_hw_data *ha = vha->hw;
2721         struct qla_tgt *tgt;
2722         struct qla_tgt_sess *sess;
2723         uint32_t lun, unpacked_lun;
2724         int lun_size, fn;
2725
2726         tgt = ha->tgt.qla_tgt;
2727
2728         lun = a->u.isp24.fcp_cmnd.lun;
2729         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2730         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2731         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2732             a->u.isp24.fcp_hdr.s_id);
2733         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2734
2735         if (!sess) {
2736                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2737                     "qla_target(%d): task mgmt fn 0x%x for "
2738                     "non-existant session\n", vha->vp_idx, fn);
2739                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2740                     sizeof(struct atio_from_isp));
2741         }
2742
2743         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2744 }
2745
2746 /* ha->hardware_lock supposed to be held on entry */
2747 static int __qlt_abort_task(struct scsi_qla_host *vha,
2748         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2749 {
2750         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2751         struct qla_hw_data *ha = vha->hw;
2752         struct qla_tgt_mgmt_cmd *mcmd;
2753         uint32_t lun, unpacked_lun;
2754         int rc;
2755
2756         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2757         if (mcmd == NULL) {
2758                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2759                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2760                     vha->vp_idx, __func__);
2761                 return -ENOMEM;
2762         }
2763         memset(mcmd, 0, sizeof(*mcmd));
2764
2765         mcmd->sess = sess;
2766         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2767             sizeof(mcmd->orig_iocb.imm_ntfy));
2768
2769         lun = a->u.isp24.fcp_cmnd.lun;
2770         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2771
2772         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2773             le16_to_cpu(iocb->u.isp2x.seq_id));
2774         if (rc != 0) {
2775                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2776                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2777                     vha->vp_idx, rc);
2778                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2779                 return -EFAULT;
2780         }
2781
2782         return 0;
2783 }
2784
2785 /* ha->hardware_lock supposed to be held on entry */
2786 static int qlt_abort_task(struct scsi_qla_host *vha,
2787         struct imm_ntfy_from_isp *iocb)
2788 {
2789         struct qla_hw_data *ha = vha->hw;
2790         struct qla_tgt_sess *sess;
2791         int loop_id;
2792
2793         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2794
2795         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2796         if (sess == NULL) {
2797                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2798                     "qla_target(%d): task abort for unexisting "
2799                     "session\n", vha->vp_idx);
2800                 return qlt_sched_sess_work(ha->tgt.qla_tgt,
2801                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2802         }
2803
2804         return __qlt_abort_task(vha, iocb, sess);
2805 }
2806
2807 /*
2808  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2809  */
2810 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2811         struct imm_ntfy_from_isp *iocb)
2812 {
2813         struct qla_hw_data *ha = vha->hw;
2814         int res = 0;
2815
2816         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2817             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
2818             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
2819
2820         switch (iocb->u.isp24.status_subcode) {
2821         case ELS_PLOGI:
2822         case ELS_FLOGI:
2823         case ELS_PRLI:
2824         case ELS_LOGO:
2825         case ELS_PRLO:
2826                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2827                 break;
2828         case ELS_PDISC:
2829         case ELS_ADISC:
2830         {
2831                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2832                 if (tgt->link_reinit_iocb_pending) {
2833                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
2834                             0, 0, 0, 0, 0, 0);
2835                         tgt->link_reinit_iocb_pending = 0;
2836                 }
2837                 res = 1; /* send notify ack */
2838                 break;
2839         }
2840
2841         default:
2842                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
2843                     "qla_target(%d): Unsupported ELS command %x "
2844                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
2845                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2846                 break;
2847         }
2848
2849         return res;
2850 }
2851
2852 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
2853 {
2854         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
2855         size_t first_offset = 0, rem_offset = offset, tmp = 0;
2856         int i, sg_srr_cnt, bufflen = 0;
2857
2858         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
2859             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
2860             "cmd->sg_cnt: %u, direction: %d\n",
2861             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
2862
2863         /*
2864          * FIXME: Reject non zero SRR relative offset until we can test
2865          * this code properly.
2866          */
2867         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
2868         return -1;
2869
2870         if (!cmd->sg || !cmd->sg_cnt) {
2871                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
2872                     "Missing cmd->sg or zero cmd->sg_cnt in"
2873                     " qla_tgt_set_data_offset\n");
2874                 return -EINVAL;
2875         }
2876         /*
2877          * Walk the current cmd->sg list until we locate the new sg_srr_start
2878          */
2879         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
2880                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
2881                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
2882                     i, sg, sg_page(sg), sg->length, sg->offset);
2883
2884                 if ((sg->length + tmp) > offset) {
2885                         first_offset = rem_offset;
2886                         sg_srr_start = sg;
2887                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
2888                             "Found matching sg[%d], using %p as sg_srr_start, "
2889                             "and using first_offset: %zu\n", i, sg,
2890                             first_offset);
2891                         break;
2892                 }
2893                 tmp += sg->length;
2894                 rem_offset -= sg->length;
2895         }
2896
2897         if (!sg_srr_start) {
2898                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
2899                     "Unable to locate sg_srr_start for offset: %u\n", offset);
2900                 return -EINVAL;
2901         }
2902         sg_srr_cnt = (cmd->sg_cnt - i);
2903
2904         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
2905         if (!sg_srr) {
2906                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
2907                     "Unable to allocate sgp\n");
2908                 return -ENOMEM;
2909         }
2910         sg_init_table(sg_srr, sg_srr_cnt);
2911         sgp = &sg_srr[0];
2912         /*
2913          * Walk the remaining list for sg_srr_start, mapping to the newly
2914          * allocated sg_srr taking first_offset into account.
2915          */
2916         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
2917                 if (first_offset) {
2918                         sg_set_page(sgp, sg_page(sg),
2919                             (sg->length - first_offset), first_offset);
2920                         first_offset = 0;
2921                 } else {
2922                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
2923                 }
2924                 bufflen += sgp->length;
2925
2926                 sgp = sg_next(sgp);
2927                 if (!sgp)
2928                         break;
2929         }
2930
2931         cmd->sg = sg_srr;
2932         cmd->sg_cnt = sg_srr_cnt;
2933         cmd->bufflen = bufflen;
2934         cmd->offset += offset;
2935         cmd->free_sg = 1;
2936
2937         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
2938         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
2939             cmd->sg_cnt);
2940         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
2941             cmd->bufflen);
2942         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
2943             cmd->offset);
2944
2945         if (cmd->sg_cnt < 0)
2946                 BUG();
2947
2948         if (cmd->bufflen < 0)
2949                 BUG();
2950
2951         return 0;
2952 }
2953
2954 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
2955         uint32_t srr_rel_offs, int *xmit_type)
2956 {
2957         int res = 0, rel_offs;
2958
2959         rel_offs = srr_rel_offs - cmd->offset;
2960         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
2961             srr_rel_offs, rel_offs);
2962
2963         *xmit_type = QLA_TGT_XMIT_ALL;
2964
2965         if (rel_offs < 0) {
2966                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
2967                     "qla_target(%d): SRR rel_offs (%d) < 0",
2968                     cmd->vha->vp_idx, rel_offs);
2969                 res = -1;
2970         } else if (rel_offs == cmd->bufflen)
2971                 *xmit_type = QLA_TGT_XMIT_STATUS;
2972         else if (rel_offs > 0)
2973                 res = qlt_set_data_offset(cmd, rel_offs);
2974
2975         return res;
2976 }
2977
2978 /* No locks, thread context */
2979 static void qlt_handle_srr(struct scsi_qla_host *vha,
2980         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
2981 {
2982         struct imm_ntfy_from_isp *ntfy =
2983             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
2984         struct qla_hw_data *ha = vha->hw;
2985         struct qla_tgt_cmd *cmd = sctio->cmd;
2986         struct se_cmd *se_cmd = &cmd->se_cmd;
2987         unsigned long flags;
2988         int xmit_type = 0, resp = 0;
2989         uint32_t offset;
2990         uint16_t srr_ui;
2991
2992         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
2993         srr_ui = ntfy->u.isp24.srr_ui;
2994
2995         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
2996             cmd, srr_ui);
2997
2998         switch (srr_ui) {
2999         case SRR_IU_STATUS:
3000                 spin_lock_irqsave(&ha->hardware_lock, flags);
3001                 qlt_send_notify_ack(vha, ntfy,
3002                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3003                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3004                 xmit_type = QLA_TGT_XMIT_STATUS;
3005                 resp = 1;
3006                 break;
3007         case SRR_IU_DATA_IN:
3008                 if (!cmd->sg || !cmd->sg_cnt) {
3009                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3010                             "Unable to process SRR_IU_DATA_IN due to"
3011                             " missing cmd->sg, state: %d\n", cmd->state);
3012                         dump_stack();
3013                         goto out_reject;
3014                 }
3015                 if (se_cmd->scsi_status != 0) {
3016                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3017                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3018                             "scsi_status\n");
3019                         goto out_reject;
3020                 }
3021                 cmd->bufflen = se_cmd->data_length;
3022
3023                 if (qlt_has_data(cmd)) {
3024                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3025                                 goto out_reject;
3026                         spin_lock_irqsave(&ha->hardware_lock, flags);
3027                         qlt_send_notify_ack(vha, ntfy,
3028                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3029                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3030                         resp = 1;
3031                 } else {
3032                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3033                             "qla_target(%d): SRR for in data for cmd "
3034                             "without them (tag %d, SCSI status %d), "
3035                             "reject", vha->vp_idx, cmd->tag,
3036                             cmd->se_cmd.scsi_status);
3037                         goto out_reject;
3038                 }
3039                 break;
3040         case SRR_IU_DATA_OUT:
3041                 if (!cmd->sg || !cmd->sg_cnt) {
3042                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3043                             "Unable to process SRR_IU_DATA_OUT due to"
3044                             " missing cmd->sg\n");
3045                         dump_stack();
3046                         goto out_reject;
3047                 }
3048                 if (se_cmd->scsi_status != 0) {
3049                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3050                             "Rejecting SRR_IU_DATA_OUT"
3051                             " with non GOOD scsi_status\n");
3052                         goto out_reject;
3053                 }
3054                 cmd->bufflen = se_cmd->data_length;
3055
3056                 if (qlt_has_data(cmd)) {
3057                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3058                                 goto out_reject;
3059                         spin_lock_irqsave(&ha->hardware_lock, flags);
3060                         qlt_send_notify_ack(vha, ntfy,
3061                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3062                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3063                         if (xmit_type & QLA_TGT_XMIT_DATA)
3064                                 qlt_rdy_to_xfer(cmd);
3065                 } else {
3066                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3067                             "qla_target(%d): SRR for out data for cmd "
3068                             "without them (tag %d, SCSI status %d), "
3069                             "reject", vha->vp_idx, cmd->tag,
3070                             cmd->se_cmd.scsi_status);
3071                         goto out_reject;
3072                 }
3073                 break;
3074         default:
3075                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3076                     "qla_target(%d): Unknown srr_ui value %x",
3077                     vha->vp_idx, srr_ui);
3078                 goto out_reject;
3079         }
3080
3081         /* Transmit response in case of status and data-in cases */
3082         if (resp)
3083                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3084
3085         return;
3086
3087 out_reject:
3088         spin_lock_irqsave(&ha->hardware_lock, flags);
3089         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3090             NOTIFY_ACK_SRR_FLAGS_REJECT,
3091             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3092             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3093         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3094                 cmd->state = QLA_TGT_STATE_DATA_IN;
3095                 dump_stack();
3096         } else
3097                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3098         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3099 }
3100
3101 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3102         struct qla_tgt_srr_imm *imm, int ha_locked)
3103 {
3104         struct qla_hw_data *ha = vha->hw;
3105         unsigned long flags = 0;
3106
3107         if (!ha_locked)
3108                 spin_lock_irqsave(&ha->hardware_lock, flags);
3109
3110         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3111             NOTIFY_ACK_SRR_FLAGS_REJECT,
3112             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3113             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3114
3115         if (!ha_locked)
3116                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3117
3118         kfree(imm);
3119 }
3120
3121 static void qlt_handle_srr_work(struct work_struct *work)
3122 {
3123         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3124         struct scsi_qla_host *vha = tgt->vha;
3125         struct qla_tgt_srr_ctio *sctio;
3126         unsigned long flags;
3127
3128         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3129             tgt);
3130
3131 restart:
3132         spin_lock_irqsave(&tgt->srr_lock, flags);
3133         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3134                 struct qla_tgt_srr_imm *imm, *i, *ti;
3135                 struct qla_tgt_cmd *cmd;
3136                 struct se_cmd *se_cmd;
3137
3138                 imm = NULL;
3139                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3140                                                 srr_list_entry) {
3141                         if (i->srr_id == sctio->srr_id) {
3142                                 list_del(&i->srr_list_entry);
3143                                 if (imm) {
3144                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3145                                           "qla_target(%d): There must be "
3146                                           "only one IMM SRR per CTIO SRR "
3147                                           "(IMM SRR %p, id %d, CTIO %p\n",
3148                                           vha->vp_idx, i, i->srr_id, sctio);
3149                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
3150                                 } else
3151                                         imm = i;
3152                         }
3153                 }
3154
3155                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3156                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3157                     sctio->srr_id);
3158
3159                 if (imm == NULL) {
3160                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3161                             "Not found matching IMM for SRR CTIO (id %d)\n",
3162                             sctio->srr_id);
3163                         continue;
3164                 } else
3165                         list_del(&sctio->srr_list_entry);
3166
3167                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3168
3169                 cmd = sctio->cmd;
3170                 /*
3171                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3172                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3173                  * logic..
3174                  */
3175                 cmd->offset = 0;
3176                 if (cmd->free_sg) {
3177                         kfree(cmd->sg);
3178                         cmd->sg = NULL;
3179                         cmd->free_sg = 0;
3180                 }
3181                 se_cmd = &cmd->se_cmd;
3182
3183                 cmd->sg_cnt = se_cmd->t_data_nents;
3184                 cmd->sg = se_cmd->t_data_sg;
3185
3186                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3187                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3188                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3189                     se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
3190
3191                 qlt_handle_srr(vha, sctio, imm);
3192
3193                 kfree(imm);
3194                 kfree(sctio);
3195                 goto restart;
3196         }
3197         spin_unlock_irqrestore(&tgt->srr_lock, flags);
3198 }
3199
3200 /* ha->hardware_lock supposed to be held on entry */
3201 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3202         struct imm_ntfy_from_isp *iocb)
3203 {
3204         struct qla_tgt_srr_imm *imm;
3205         struct qla_hw_data *ha = vha->hw;
3206         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3207         struct qla_tgt_srr_ctio *sctio;
3208
3209         tgt->imm_srr_id++;
3210
3211         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3212             vha->vp_idx);
3213
3214         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3215         if (imm != NULL) {
3216                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3217
3218                 /* IRQ is already OFF */
3219                 spin_lock(&tgt->srr_lock);
3220                 imm->srr_id = tgt->imm_srr_id;
3221                 list_add_tail(&imm->srr_list_entry,
3222                     &tgt->srr_imm_list);
3223                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3224                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
3225                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
3226                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3227                         int found = 0;
3228                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
3229                             srr_list_entry) {
3230                                 if (sctio->srr_id == imm->srr_id) {
3231                                         found = 1;
3232                                         break;
3233                                 }
3234                         }
3235                         if (found) {
3236                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3237                                     "Scheduling srr work\n");
3238                                 schedule_work(&tgt->srr_work);
3239                         } else {
3240                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3241                                     "qla_target(%d): imm_srr_id "
3242                                     "== ctio_srr_id (%d), but there is no "
3243                                     "corresponding SRR CTIO, deleting IMM "
3244                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3245                                     imm);
3246                                 list_del(&imm->srr_list_entry);
3247
3248                                 kfree(imm);
3249
3250                                 spin_unlock(&tgt->srr_lock);
3251                                 goto out_reject;
3252                         }
3253                 }
3254                 spin_unlock(&tgt->srr_lock);
3255         } else {
3256                 struct qla_tgt_srr_ctio *ts;
3257
3258                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3259                     "qla_target(%d): Unable to allocate SRR IMM "
3260                     "entry, SRR request will be rejected\n", vha->vp_idx);
3261
3262                 /* IRQ is already OFF */
3263                 spin_lock(&tgt->srr_lock);
3264                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3265                     srr_list_entry) {
3266                         if (sctio->srr_id == tgt->imm_srr_id) {
3267                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3268                                     "CTIO SRR %p deleted (id %d)\n",
3269                                     sctio, sctio->srr_id);
3270                                 list_del(&sctio->srr_list_entry);
3271                                 qlt_send_term_exchange(vha, sctio->cmd,
3272                                     &sctio->cmd->atio, 1);
3273                                 kfree(sctio);
3274                         }
3275                 }
3276                 spin_unlock(&tgt->srr_lock);
3277                 goto out_reject;
3278         }
3279
3280         return;
3281
3282 out_reject:
3283         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3284             NOTIFY_ACK_SRR_FLAGS_REJECT,
3285             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3286             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3287 }
3288
3289 /*
3290  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3291  */
3292 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3293         struct imm_ntfy_from_isp *iocb)
3294 {
3295         struct qla_hw_data *ha = vha->hw;
3296         uint32_t add_flags = 0;
3297         int send_notify_ack = 1;
3298         uint16_t status;
3299
3300         status = le16_to_cpu(iocb->u.isp2x.status);
3301         switch (status) {
3302         case IMM_NTFY_LIP_RESET:
3303         {
3304                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3305                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3306                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3307                     iocb->u.isp24.status_subcode);
3308
3309                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3310                         send_notify_ack = 0;
3311                 break;
3312         }
3313
3314         case IMM_NTFY_LIP_LINK_REINIT:
3315         {
3316                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3317                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3318                     "qla_target(%d): LINK REINIT (loop %#x, "
3319                     "subcode %x)\n", vha->vp_idx,
3320                     le16_to_cpu(iocb->u.isp24.nport_handle),
3321                     iocb->u.isp24.status_subcode);
3322                 if (tgt->link_reinit_iocb_pending) {
3323                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3324                             0, 0, 0, 0, 0, 0);
3325                 }
3326                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3327                 tgt->link_reinit_iocb_pending = 1;
3328                 /*
3329                  * QLogic requires to wait after LINK REINIT for possible
3330                  * PDISC or ADISC ELS commands
3331                  */
3332                 send_notify_ack = 0;
3333                 break;
3334         }
3335
3336         case IMM_NTFY_PORT_LOGOUT:
3337                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3338                     "qla_target(%d): Port logout (loop "
3339                     "%#x, subcode %x)\n", vha->vp_idx,
3340                     le16_to_cpu(iocb->u.isp24.nport_handle),
3341                     iocb->u.isp24.status_subcode);
3342
3343                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3344                         send_notify_ack = 0;
3345                 /* The sessions will be cleared in the callback, if needed */
3346                 break;
3347
3348         case IMM_NTFY_GLBL_TPRLO:
3349                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3350                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3351                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3352                         send_notify_ack = 0;
3353                 /* The sessions will be cleared in the callback, if needed */
3354                 break;
3355
3356         case IMM_NTFY_PORT_CONFIG:
3357                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3358                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3359                     status);
3360                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3361                         send_notify_ack = 0;
3362                 /* The sessions will be cleared in the callback, if needed */
3363                 break;
3364
3365         case IMM_NTFY_GLBL_LOGO:
3366                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3367                     "qla_target(%d): Link failure detected\n",
3368                     vha->vp_idx);
3369                 /* I_T nexus loss */
3370                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3371                         send_notify_ack = 0;
3372                 break;
3373
3374         case IMM_NTFY_IOCB_OVERFLOW:
3375                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3376                     "qla_target(%d): Cannot provide requested "
3377                     "capability (IOCB overflowed the immediate notify "
3378                     "resource count)\n", vha->vp_idx);
3379                 break;
3380
3381         case IMM_NTFY_ABORT_TASK:
3382                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3383                     "qla_target(%d): Abort Task (S %08x I %#x -> "
3384                     "L %#x)\n", vha->vp_idx,
3385                     le16_to_cpu(iocb->u.isp2x.seq_id),
3386                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3387                     le16_to_cpu(iocb->u.isp2x.lun));
3388                 if (qlt_abort_task(vha, iocb) == 0)
3389                         send_notify_ack = 0;
3390                 break;
3391
3392         case IMM_NTFY_RESOURCE:
3393                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3394                     "qla_target(%d): Out of resources, host %ld\n",
3395                     vha->vp_idx, vha->host_no);
3396                 break;
3397
3398         case IMM_NTFY_MSG_RX:
3399                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3400                     "qla_target(%d): Immediate notify task %x\n",
3401                     vha->vp_idx, iocb->u.isp2x.task_flags);
3402                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3403                         send_notify_ack = 0;
3404                 break;
3405
3406         case IMM_NTFY_ELS:
3407                 if (qlt_24xx_handle_els(vha, iocb) == 0)
3408                         send_notify_ack = 0;
3409                 break;
3410
3411         case IMM_NTFY_SRR:
3412                 qlt_prepare_srr_imm(vha, iocb);
3413                 send_notify_ack = 0;
3414                 break;
3415
3416         default:
3417                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3418                     "qla_target(%d): Received unknown immediate "
3419                     "notify status %x\n", vha->vp_idx, status);
3420                 break;
3421         }
3422
3423         if (send_notify_ack)
3424                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3425 }
3426
3427 /*
3428  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3429  * This function sends busy to ISP 2xxx or 24xx.
3430  */
3431 static void qlt_send_busy(struct scsi_qla_host *vha,
3432         struct atio_from_isp *atio, uint16_t status)
3433 {
3434         struct ctio7_to_24xx *ctio24;
3435         struct qla_hw_data *ha = vha->hw;
3436         request_t *pkt;
3437         struct qla_tgt_sess *sess = NULL;
3438
3439         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3440             atio->u.isp24.fcp_hdr.s_id);
3441         if (!sess) {
3442                 qlt_send_term_exchange(vha, NULL, atio, 1);
3443                 return;
3444         }
3445         /* Sending marker isn't necessary, since we called from ISR */
3446
3447         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3448         if (!pkt) {
3449                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3450                     "qla_target(%d): %s failed: unable to allocate "
3451                     "request packet", vha->vp_idx, __func__);
3452                 return;
3453         }
3454
3455         pkt->entry_count = 1;
3456         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3457
3458         ctio24 = (struct ctio7_to_24xx *)pkt;
3459         ctio24->entry_type = CTIO_TYPE7;
3460         ctio24->nport_handle = sess->loop_id;
3461         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3462         ctio24->vp_index = vha->vp_idx;
3463         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3464         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3465         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3466         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3467         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3468             __constant_cpu_to_le16(
3469                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3470                 CTIO7_FLAGS_DONT_RET_CTIO);
3471         /*
3472          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3473          * if the explicit conformation is used.
3474          */
3475         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3476         ctio24->u.status1.scsi_status = cpu_to_le16(status);
3477         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3478             &atio->u.isp24.fcp_cmnd.add_cdb[
3479             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3480         if (ctio24->u.status1.residual != 0)
3481                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3482
3483         qla2x00_start_iocbs(vha, vha->req);
3484 }
3485
3486 /* ha->hardware_lock supposed to be held on entry */
3487 /* called via callback from qla2xxx */
3488 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3489         struct atio_from_isp *atio)
3490 {
3491         struct qla_hw_data *ha = vha->hw;
3492         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3493         int rc;
3494
3495         if (unlikely(tgt == NULL)) {
3496                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3497                     "ATIO pkt, but no tgt (ha %p)", ha);
3498                 return;
3499         }
3500         ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3501             "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3502             vha->vp_idx, atio, atio->u.raw.entry_type,
3503             atio->u.raw.entry_count);
3504         /*
3505          * In tgt_stop mode we also should allow all requests to pass.
3506          * Otherwise, some commands can stuck.
3507          */
3508
3509         tgt->irq_cmd_count++;
3510
3511         switch (atio->u.raw.entry_type) {
3512         case ATIO_TYPE7:
3513                 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3514                     "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3515                     "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3516                     vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3517                     atio->u.isp24.fcp_cmnd.rddata,
3518                     atio->u.isp24.fcp_cmnd.wrdata,
3519                     atio->u.isp24.fcp_cmnd.add_cdb_len,
3520                     be32_to_cpu(get_unaligned((uint32_t *)
3521                         &atio->u.isp24.fcp_cmnd.add_cdb[
3522                         atio->u.isp24.fcp_cmnd.add_cdb_len])),
3523                     atio->u.isp24.fcp_hdr.s_id[0],
3524                     atio->u.isp24.fcp_hdr.s_id[1],
3525                     atio->u.isp24.fcp_hdr.s_id[2]);
3526
3527                 if (unlikely(atio->u.isp24.exchange_addr ==
3528                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3529                         ql_dbg(ql_dbg_tgt, vha, 0xe058,
3530                             "qla_target(%d): ATIO_TYPE7 "
3531                             "received with UNKNOWN exchange address, "
3532                             "sending QUEUE_FULL\n", vha->vp_idx);
3533                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3534                         break;
3535                 }
3536                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3537                         rc = qlt_handle_cmd_for_atio(vha, atio);
3538                 else
3539                         rc = qlt_handle_task_mgmt(vha, atio);
3540                 if (unlikely(rc != 0)) {
3541                         if (rc == -ESRCH) {
3542 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3543                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3544 #else
3545                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3546 #endif
3547                         } else {
3548                                 if (tgt->tgt_stop) {
3549                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
3550                                             "qla_target: Unable to send "
3551                                             "command to target for req, "
3552                                             "ignoring.\n");
3553                                 } else {
3554                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3555                                             "qla_target(%d): Unable to send "
3556                                             "command to target, sending BUSY "
3557                                             "status.\n", vha->vp_idx);
3558                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3559                                 }
3560                         }
3561                 }
3562                 break;
3563
3564         case IMMED_NOTIFY_TYPE:
3565         {
3566                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3567                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3568                             "qla_target(%d): Received ATIO packet %x "
3569                             "with error status %x\n", vha->vp_idx,
3570                             atio->u.raw.entry_type,
3571                             atio->u.isp2x.entry_status);
3572                         break;
3573                 }
3574                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3575                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3576                 break;
3577         }
3578
3579         default:
3580                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3581                     "qla_target(%d): Received unknown ATIO atio "
3582                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3583                 break;
3584         }
3585
3586         tgt->irq_cmd_count--;
3587 }
3588
3589 /* ha->hardware_lock supposed to be held on entry */
3590 /* called via callback from qla2xxx */
3591 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3592 {
3593         struct qla_hw_data *ha = vha->hw;
3594         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3595
3596         if (unlikely(tgt == NULL)) {
3597                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3598                     "qla_target(%d): Response pkt %x received, but no "
3599                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3600                 return;
3601         }
3602
3603         ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3604             "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3605             "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3606             pkt->entry_count, pkt->entry_status, pkt->handle);
3607
3608         /*
3609          * In tgt_stop mode we also should allow all requests to pass.
3610          * Otherwise, some commands can stuck.
3611          */
3612
3613         tgt->irq_cmd_count++;
3614
3615         switch (pkt->entry_type) {
3616         case CTIO_TYPE7:
3617         {
3618                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3619                 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3620                     vha->vp_idx);
3621                 qlt_do_ctio_completion(vha, entry->handle,
3622                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3623                     entry);
3624                 break;
3625         }
3626
3627         case ACCEPT_TGT_IO_TYPE:
3628         {
3629                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3630                 int rc;
3631                 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3632                     "ACCEPT_TGT_IO instance %d status %04x "
3633                     "lun %04x read/write %d data_length %04x "
3634                     "target_id %02x rx_id %04x\n ", vha->vp_idx,
3635                     le16_to_cpu(atio->u.isp2x.status),
3636                     le16_to_cpu(atio->u.isp2x.lun),
3637                     atio->u.isp2x.execution_codes,
3638                     le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3639                     atio), atio->u.isp2x.rx_id);
3640                 if (atio->u.isp2x.status !=
3641                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3642                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3643                             "qla_target(%d): ATIO with error "
3644                             "status %x received\n", vha->vp_idx,
3645                             le16_to_cpu(atio->u.isp2x.status));
3646                         break;
3647                 }
3648                 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3649                     "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3650                     atio->u.isp2x.cdb[0], (unsigned long
3651                     int)sizeof(atio->u.isp2x.cdb));
3652
3653                 rc = qlt_handle_cmd_for_atio(vha, atio);
3654                 if (unlikely(rc != 0)) {
3655                         if (rc == -ESRCH) {
3656 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3657                                 qlt_send_busy(vha, atio, 0);
3658 #else
3659                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3660 #endif
3661                         } else {
3662                                 if (tgt->tgt_stop) {
3663                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3664                                             "qla_target: Unable to send "
3665                                             "command to target, sending TERM "
3666                                             "EXCHANGE for rsp\n");
3667                                         qlt_send_term_exchange(vha, NULL,
3668                                             atio, 1);
3669                                 } else {
3670                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
3671                                             "qla_target(%d): Unable to send "
3672                                             "command to target, sending BUSY "
3673                                             "status\n", vha->vp_idx);
3674                                         qlt_send_busy(vha, atio, 0);
3675                                 }
3676                         }
3677                 }
3678         }
3679         break;
3680
3681         case CONTINUE_TGT_IO_TYPE:
3682         {
3683                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3684                 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3685                     "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3686                 qlt_do_ctio_completion(vha, entry->handle,
3687                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3688                     entry);
3689                 break;
3690         }
3691
3692         case CTIO_A64_TYPE:
3693         {
3694                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3695                 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3696                     vha->vp_idx);
3697                 qlt_do_ctio_completion(vha, entry->handle,
3698                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3699                     entry);
3700                 break;
3701         }
3702
3703         case IMMED_NOTIFY_TYPE:
3704                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3705                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3706                 break;
3707
3708         case NOTIFY_ACK_TYPE:
3709                 if (tgt->notify_ack_expected > 0) {
3710                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3711                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
3712                             "NOTIFY_ACK seq %08x status %x\n",
3713                             le16_to_cpu(entry->u.isp2x.seq_id),
3714                             le16_to_cpu(entry->u.isp2x.status));
3715                         tgt->notify_ack_expected--;
3716                         if (entry->u.isp2x.status !=
3717                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3718                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3719                                     "qla_target(%d): NOTIFY_ACK "
3720                                     "failed %x\n", vha->vp_idx,
3721                                     le16_to_cpu(entry->u.isp2x.status));
3722                         }
3723                 } else {
3724                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
3725                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3726                             vha->vp_idx);
3727                 }
3728                 break;
3729
3730         case ABTS_RECV_24XX:
3731                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3732                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3733                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3734                 break;
3735
3736         case ABTS_RESP_24XX:
3737                 if (tgt->abts_resp_expected > 0) {
3738                         struct abts_resp_from_24xx_fw *entry =
3739                                 (struct abts_resp_from_24xx_fw *)pkt;
3740                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
3741                             "ABTS_RESP_24XX: compl_status %x\n",
3742                             entry->compl_status);
3743                         tgt->abts_resp_expected--;
3744                         if (le16_to_cpu(entry->compl_status) !=
3745                             ABTS_RESP_COMPL_SUCCESS) {
3746                                 if ((entry->error_subcode1 == 0x1E) &&
3747                                     (entry->error_subcode2 == 0)) {
3748                                         /*
3749                                          * We've got a race here: aborted
3750                                          * exchange not terminated, i.e.
3751                                          * response for the aborted command was
3752                                          * sent between the abort request was
3753                                          * received and processed.
3754                                          * Unfortunately, the firmware has a
3755                                          * silly requirement that all aborted
3756                                          * exchanges must be explicitely
3757                                          * terminated, otherwise it refuses to
3758                                          * send responses for the abort
3759                                          * requests. So, we have to
3760                                          * (re)terminate the exchange and retry
3761                                          * the abort response.
3762                                          */
3763                                         qlt_24xx_retry_term_exchange(vha,
3764                                             entry);
3765                                 } else
3766                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
3767                                             "qla_target(%d): ABTS_RESP_24XX "
3768                                             "failed %x (subcode %x:%x)",
3769                                             vha->vp_idx, entry->compl_status,
3770                                             entry->error_subcode1,
3771                                             entry->error_subcode2);
3772                         }
3773                 } else {
3774                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
3775                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
3776                             "received\n", vha->vp_idx);
3777                 }
3778                 break;
3779
3780         default:
3781                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3782                     "qla_target(%d): Received unknown response pkt "
3783                     "type %x\n", vha->vp_idx, pkt->entry_type);
3784                 break;
3785         }
3786
3787         tgt->irq_cmd_count--;
3788 }
3789
3790 /*
3791  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3792  */
3793 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3794         uint16_t *mailbox)
3795 {
3796         struct qla_hw_data *ha = vha->hw;
3797         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3798         int login_code;
3799
3800         ql_dbg(ql_dbg_tgt, vha, 0xe039,
3801             "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3802             vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3803             ha->operating_mode, ha->current_topology);
3804
3805         if (!ha->tgt.tgt_ops)
3806                 return;
3807
3808         if (unlikely(tgt == NULL)) {
3809                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3810                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3811                 return;
3812         }
3813
3814         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3815             IS_QLA2100(ha))
3816                 return;
3817         /*
3818          * In tgt_stop mode we also should allow all requests to pass.
3819          * Otherwise, some commands can stuck.
3820          */
3821
3822         tgt->irq_cmd_count++;
3823
3824         switch (code) {
3825         case MBA_RESET:                 /* Reset */
3826         case MBA_SYSTEM_ERR:            /* System Error */
3827         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
3828         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
3829                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
3830                     "qla_target(%d): System error async event %#x "
3831                     "occurred", vha->vp_idx, code);
3832                 break;
3833         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
3834                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3835                 break;
3836
3837         case MBA_LOOP_UP:
3838         {
3839                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
3840                     "qla_target(%d): Async LOOP_UP occurred "
3841                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3842                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3843                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3844                 if (tgt->link_reinit_iocb_pending) {
3845                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
3846                             0, 0, 0, 0, 0, 0);
3847                         tgt->link_reinit_iocb_pending = 0;
3848                 }
3849                 break;
3850         }
3851
3852         case MBA_LIP_OCCURRED:
3853         case MBA_LOOP_DOWN:
3854         case MBA_LIP_RESET:
3855         case MBA_RSCN_UPDATE:
3856                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
3857                     "qla_target(%d): Async event %#x occurred "
3858                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3859                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3860                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3861                 break;
3862
3863         case MBA_PORT_UPDATE:
3864                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
3865                     "qla_target(%d): Port update async event %#x "
3866                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
3867                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3868                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3869                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3870
3871                 login_code = le16_to_cpu(mailbox[2]);
3872                 if (login_code == 0x4)
3873                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
3874                             "Async MB 2: Got PLOGI Complete\n");
3875                 else if (login_code == 0x7)
3876                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
3877                             "Async MB 2: Port Logged Out\n");
3878                 break;
3879
3880         default:
3881                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
3882                     "qla_target(%d): Async event %#x occurred: "
3883                     "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3884                     code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3885                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3886                 break;
3887         }
3888
3889         tgt->irq_cmd_count--;
3890 }
3891
3892 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
3893         uint16_t loop_id)
3894 {
3895         fc_port_t *fcport;
3896         int rc;
3897
3898         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
3899         if (!fcport) {
3900                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
3901                     "qla_target(%d): Allocation of tmp FC port failed",
3902                     vha->vp_idx);
3903                 return NULL;
3904         }
3905
3906         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
3907
3908         fcport->loop_id = loop_id;
3909
3910         rc = qla2x00_get_port_database(vha, fcport, 0);
3911         if (rc != QLA_SUCCESS) {
3912                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
3913                     "qla_target(%d): Failed to retrieve fcport "
3914                     "information -- get_port_database() returned %x "
3915                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
3916                 kfree(fcport);
3917                 return NULL;
3918         }
3919
3920         return fcport;
3921 }
3922
3923 /* Must be called under tgt_mutex */
3924 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
3925         uint8_t *s_id)
3926 {
3927         struct qla_hw_data *ha = vha->hw;
3928         struct qla_tgt_sess *sess = NULL;
3929         fc_port_t *fcport = NULL;
3930         int rc, global_resets;
3931         uint16_t loop_id = 0;
3932
3933 retry:
3934         global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
3935
3936         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
3937         if (rc != 0) {
3938                 if ((s_id[0] == 0xFF) &&
3939                     (s_id[1] == 0xFC)) {
3940                         /*
3941                          * This is Domain Controller, so it should be
3942                          * OK to drop SCSI commands from it.
3943                          */
3944                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
3945                             "Unable to find initiator with S_ID %x:%x:%x",
3946                             s_id[0], s_id[1], s_id[2]);
3947                 } else
3948                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
3949                             "qla_target(%d): Unable to find "
3950                             "initiator with S_ID %x:%x:%x",
3951                             vha->vp_idx, s_id[0], s_id[1],
3952                             s_id[2]);
3953                 return NULL;
3954         }
3955
3956         fcport = qlt_get_port_database(vha, loop_id);
3957         if (!fcport)
3958                 return NULL;
3959
3960         if (global_resets !=
3961             atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
3962                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
3963                     "qla_target(%d): global reset during session discovery "
3964                     "(counter was %d, new %d), retrying", vha->vp_idx,
3965                     global_resets,
3966                     atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
3967                 goto retry;
3968         }
3969
3970         sess = qlt_create_sess(vha, fcport, true);
3971
3972         kfree(fcport);
3973         return sess;
3974 }
3975
3976 static void qlt_abort_work(struct qla_tgt *tgt,
3977         struct qla_tgt_sess_work_param *prm)
3978 {
3979         struct scsi_qla_host *vha = tgt->vha;
3980         struct qla_hw_data *ha = vha->hw;
3981         struct qla_tgt_sess *sess = NULL;
3982         unsigned long flags;
3983         uint32_t be_s_id;
3984         uint8_t s_id[3];
3985         int rc;
3986
3987         spin_lock_irqsave(&ha->hardware_lock, flags);
3988
3989         if (tgt->tgt_stop)
3990                 goto out_term;
3991
3992         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
3993         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
3994         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
3995
3996         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3997             (unsigned char *)&be_s_id);
3998         if (!sess) {
3999                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4000
4001                 mutex_lock(&ha->tgt.tgt_mutex);
4002                 sess = qlt_make_local_sess(vha, s_id);
4003                 /* sess has got an extra creation ref */
4004                 mutex_unlock(&ha->tgt.tgt_mutex);
4005
4006                 spin_lock_irqsave(&ha->hardware_lock, flags);
4007                 if (!sess)
4008                         goto out_term;
4009         } else {
4010                 kref_get(&sess->se_sess->sess_kref);
4011         }
4012
4013         if (tgt->tgt_stop)
4014                 goto out_term;
4015
4016         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4017         if (rc != 0)
4018                 goto out_term;
4019
4020         ha->tgt.tgt_ops->put_sess(sess);
4021         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4022         return;
4023
4024 out_term:
4025         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4026         if (sess)
4027                 ha->tgt.tgt_ops->put_sess(sess);
4028         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4029 }
4030
4031 static void qlt_tmr_work(struct qla_tgt *tgt,
4032         struct qla_tgt_sess_work_param *prm)
4033 {
4034         struct atio_from_isp *a = &prm->tm_iocb2;
4035         struct scsi_qla_host *vha = tgt->vha;
4036         struct qla_hw_data *ha = vha->hw;
4037         struct qla_tgt_sess *sess = NULL;
4038         unsigned long flags;
4039         uint8_t *s_id = NULL; /* to hide compiler warnings */
4040         int rc;
4041         uint32_t lun, unpacked_lun;
4042         int lun_size, fn;
4043         void *iocb;
4044
4045         spin_lock_irqsave(&ha->hardware_lock, flags);
4046
4047         if (tgt->tgt_stop)
4048                 goto out_term;
4049
4050         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4051         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4052         if (!sess) {
4053                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4054
4055                 mutex_lock(&ha->tgt.tgt_mutex);
4056                 sess = qlt_make_local_sess(vha, s_id);
4057                 /* sess has got an extra creation ref */
4058                 mutex_unlock(&ha->tgt.tgt_mutex);
4059
4060                 spin_lock_irqsave(&ha->hardware_lock, flags);
4061                 if (!sess)
4062                         goto out_term;
4063         } else {
4064                 kref_get(&sess->se_sess->sess_kref);
4065         }
4066
4067         iocb = a;
4068         lun = a->u.isp24.fcp_cmnd.lun;
4069         lun_size = sizeof(lun);
4070         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4071         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4072
4073         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4074         if (rc != 0)
4075                 goto out_term;
4076
4077         ha->tgt.tgt_ops->put_sess(sess);
4078         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4079         return;
4080
4081 out_term:
4082         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4083         if (sess)
4084                 ha->tgt.tgt_ops->put_sess(sess);
4085         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4086 }
4087
4088 static void qlt_sess_work_fn(struct work_struct *work)
4089 {
4090         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4091         struct scsi_qla_host *vha = tgt->vha;
4092         unsigned long flags;
4093
4094         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4095
4096         spin_lock_irqsave(&tgt->sess_work_lock, flags);
4097         while (!list_empty(&tgt->sess_works_list)) {
4098                 struct qla_tgt_sess_work_param *prm = list_entry(
4099                     tgt->sess_works_list.next, typeof(*prm),
4100                     sess_works_list_entry);
4101
4102                 /*
4103                  * This work can be scheduled on several CPUs at time, so we
4104                  * must delete the entry to eliminate double processing
4105                  */
4106                 list_del(&prm->sess_works_list_entry);
4107
4108                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4109
4110                 switch (prm->type) {
4111                 case QLA_TGT_SESS_WORK_ABORT:
4112                         qlt_abort_work(tgt, prm);
4113                         break;
4114                 case QLA_TGT_SESS_WORK_TM:
4115                         qlt_tmr_work(tgt, prm);
4116                         break;
4117                 default:
4118                         BUG_ON(1);
4119                         break;
4120                 }
4121
4122                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4123
4124                 kfree(prm);
4125         }
4126         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4127 }
4128
4129 /* Must be called under tgt_host_action_mutex */
4130 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4131 {
4132         struct qla_tgt *tgt;
4133
4134         if (!QLA_TGT_MODE_ENABLED())
4135                 return 0;
4136
4137         if (!IS_TGT_MODE_CAPABLE(ha)) {
4138                 ql_log(ql_log_warn, base_vha, 0xe070,
4139                     "This adapter does not support target mode.\n");
4140                 return 0;
4141         }
4142
4143         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4144             "Registering target for host %ld(%p)", base_vha->host_no, ha);
4145
4146         BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL));
4147
4148         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4149         if (!tgt) {
4150                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4151                     "Unable to allocate struct qla_tgt\n");
4152                 return -ENOMEM;
4153         }
4154
4155         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4156                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4157
4158         tgt->ha = ha;
4159         tgt->vha = base_vha;
4160         init_waitqueue_head(&tgt->waitQ);
4161         INIT_LIST_HEAD(&tgt->sess_list);
4162         INIT_LIST_HEAD(&tgt->del_sess_list);
4163         INIT_DELAYED_WORK(&tgt->sess_del_work,
4164                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4165         spin_lock_init(&tgt->sess_work_lock);
4166         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4167         INIT_LIST_HEAD(&tgt->sess_works_list);
4168         spin_lock_init(&tgt->srr_lock);
4169         INIT_LIST_HEAD(&tgt->srr_ctio_list);
4170         INIT_LIST_HEAD(&tgt->srr_imm_list);
4171         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4172         atomic_set(&tgt->tgt_global_resets_count, 0);
4173
4174         ha->tgt.qla_tgt = tgt;
4175
4176         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4177                 "qla_target(%d): using 64 Bit PCI addressing",
4178                 base_vha->vp_idx);
4179         tgt->tgt_enable_64bit_addr = 1;
4180         /* 3 is reserved */
4181         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4182         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4183         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4184
4185         mutex_lock(&qla_tgt_mutex);
4186         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4187         mutex_unlock(&qla_tgt_mutex);
4188
4189         return 0;
4190 }
4191
4192 /* Must be called under tgt_host_action_mutex */
4193 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4194 {
4195         if (!ha->tgt.qla_tgt)
4196                 return 0;
4197
4198         mutex_lock(&qla_tgt_mutex);
4199         list_del(&ha->tgt.qla_tgt->tgt_list_entry);
4200         mutex_unlock(&qla_tgt_mutex);
4201
4202         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4203             vha->host_no, ha);
4204         qlt_release(ha->tgt.qla_tgt);
4205
4206         return 0;
4207 }
4208
4209 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4210         unsigned char *b)
4211 {
4212         int i;
4213
4214         pr_debug("qla2xxx HW vha->node_name: ");
4215         for (i = 0; i < WWN_SIZE; i++)
4216                 pr_debug("%02x ", vha->node_name[i]);
4217         pr_debug("\n");
4218         pr_debug("qla2xxx HW vha->port_name: ");
4219         for (i = 0; i < WWN_SIZE; i++)
4220                 pr_debug("%02x ", vha->port_name[i]);
4221         pr_debug("\n");
4222
4223         pr_debug("qla2xxx passed configfs WWPN: ");
4224         put_unaligned_be64(wwpn, b);
4225         for (i = 0; i < WWN_SIZE; i++)
4226                 pr_debug("%02x ", b[i]);
4227         pr_debug("\n");
4228 }
4229
4230 /**
4231  * qla_tgt_lport_register - register lport with external module
4232  *
4233  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4234  * @wwpn: Passwd FC target WWPN
4235  * @callback:  lport initialization callback for tcm_qla2xxx code
4236  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4237  */
4238 int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
4239         int (*callback)(struct scsi_qla_host *), void *target_lport_ptr)
4240 {
4241         struct qla_tgt *tgt;
4242         struct scsi_qla_host *vha;
4243         struct qla_hw_data *ha;
4244         struct Scsi_Host *host;
4245         unsigned long flags;
4246         int rc;
4247         u8 b[WWN_SIZE];
4248
4249         mutex_lock(&qla_tgt_mutex);
4250         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4251                 vha = tgt->vha;
4252                 ha = vha->hw;
4253
4254                 host = vha->host;
4255                 if (!host)
4256                         continue;
4257
4258                 if (ha->tgt.tgt_ops != NULL)
4259                         continue;
4260
4261                 if (!(host->hostt->supported_mode & MODE_TARGET))
4262                         continue;
4263
4264                 spin_lock_irqsave(&ha->hardware_lock, flags);
4265                 if (host->active_mode & MODE_TARGET) {
4266                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4267                             host->host_no);
4268                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4269                         continue;
4270                 }
4271                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4272
4273                 if (!scsi_host_get(host)) {
4274                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
4275                             "Unable to scsi_host_get() for"
4276                             " qla2xxx scsi_host\n");
4277                         continue;
4278                 }
4279                 qlt_lport_dump(vha, wwpn, b);
4280
4281                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4282                         scsi_host_put(host);
4283                         continue;
4284                 }
4285                 /*
4286                  * Setup passed parameters ahead of invoking callback
4287                  */
4288                 ha->tgt.tgt_ops = qla_tgt_ops;
4289                 ha->tgt.target_lport_ptr = target_lport_ptr;
4290                 rc = (*callback)(vha);
4291                 if (rc != 0) {
4292                         ha->tgt.tgt_ops = NULL;
4293                         ha->tgt.target_lport_ptr = NULL;
4294                         scsi_host_put(host);
4295                 }
4296                 mutex_unlock(&qla_tgt_mutex);
4297                 return rc;
4298         }
4299         mutex_unlock(&qla_tgt_mutex);
4300
4301         return -ENODEV;
4302 }
4303 EXPORT_SYMBOL(qlt_lport_register);
4304
4305 /**
4306  * qla_tgt_lport_deregister - Degister lport
4307  *
4308  * @vha:  Registered scsi_qla_host pointer
4309  */
4310 void qlt_lport_deregister(struct scsi_qla_host *vha)
4311 {
4312         struct qla_hw_data *ha = vha->hw;
4313         struct Scsi_Host *sh = vha->host;
4314         /*
4315          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4316          */
4317         ha->tgt.target_lport_ptr = NULL;
4318         ha->tgt.tgt_ops = NULL;
4319         /*
4320          * Release the Scsi_Host reference for the underlying qla2xxx host
4321          */
4322         scsi_host_put(sh);
4323 }
4324 EXPORT_SYMBOL(qlt_lport_deregister);
4325
4326 /* Must be called under HW lock */
4327 void qlt_set_mode(struct scsi_qla_host *vha)
4328 {
4329         struct qla_hw_data *ha = vha->hw;
4330
4331         switch (ql2x_ini_mode) {
4332         case QLA2XXX_INI_MODE_DISABLED:
4333         case QLA2XXX_INI_MODE_EXCLUSIVE:
4334                 vha->host->active_mode = MODE_TARGET;
4335                 break;
4336         case QLA2XXX_INI_MODE_ENABLED:
4337                 vha->host->active_mode |= MODE_TARGET;
4338                 break;
4339         default:
4340                 break;
4341         }
4342
4343         if (ha->tgt.ini_mode_force_reverse)
4344                 qla_reverse_ini_mode(vha);
4345 }
4346
4347 /* Must be called under HW lock */
4348 void qlt_clear_mode(struct scsi_qla_host *vha)
4349 {
4350         struct qla_hw_data *ha = vha->hw;
4351
4352         switch (ql2x_ini_mode) {
4353         case QLA2XXX_INI_MODE_DISABLED:
4354                 vha->host->active_mode = MODE_UNKNOWN;
4355                 break;
4356         case QLA2XXX_INI_MODE_EXCLUSIVE:
4357                 vha->host->active_mode = MODE_INITIATOR;
4358                 break;
4359         case QLA2XXX_INI_MODE_ENABLED:
4360                 vha->host->active_mode &= ~MODE_TARGET;
4361                 break;
4362         default:
4363                 break;
4364         }
4365
4366         if (ha->tgt.ini_mode_force_reverse)
4367                 qla_reverse_ini_mode(vha);
4368 }
4369
4370 /*
4371  * qla_tgt_enable_vha - NO LOCK HELD
4372  *
4373  * host_reset, bring up w/ Target Mode Enabled
4374  */
4375 void
4376 qlt_enable_vha(struct scsi_qla_host *vha)
4377 {
4378         struct qla_hw_data *ha = vha->hw;
4379         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4380         unsigned long flags;
4381
4382         if (!tgt) {
4383                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4384                     "Unable to locate qla_tgt pointer from"
4385                     " struct qla_hw_data\n");
4386                 dump_stack();
4387                 return;
4388         }
4389
4390         spin_lock_irqsave(&ha->hardware_lock, flags);
4391         tgt->tgt_stopped = 0;
4392         qlt_set_mode(vha);
4393         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4394
4395         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4396         qla2xxx_wake_dpc(vha);
4397         qla2x00_wait_for_hba_online(vha);
4398 }
4399 EXPORT_SYMBOL(qlt_enable_vha);
4400
4401 /*
4402  * qla_tgt_disable_vha - NO LOCK HELD
4403  *
4404  * Disable Target Mode and reset the adapter
4405  */
4406 void
4407 qlt_disable_vha(struct scsi_qla_host *vha)
4408 {
4409         struct qla_hw_data *ha = vha->hw;
4410         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4411         unsigned long flags;
4412
4413         if (!tgt) {
4414                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4415                     "Unable to locate qla_tgt pointer from"
4416                     " struct qla_hw_data\n");
4417                 dump_stack();
4418                 return;
4419         }
4420
4421         spin_lock_irqsave(&ha->hardware_lock, flags);
4422         qlt_clear_mode(vha);
4423         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4424
4425         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4426         qla2xxx_wake_dpc(vha);
4427         qla2x00_wait_for_hba_online(vha);
4428 }
4429
4430 /*
4431  * Called from qla_init.c:qla24xx_vport_create() contex to setup
4432  * the target mode specific struct scsi_qla_host and struct qla_hw_data
4433  * members.
4434  */
4435 void
4436 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4437 {
4438         if (!qla_tgt_mode_enabled(vha))
4439                 return;
4440
4441         mutex_init(&ha->tgt.tgt_mutex);
4442         mutex_init(&ha->tgt.tgt_host_action_mutex);
4443
4444         qlt_clear_mode(vha);
4445
4446         /*
4447          * NOTE: Currently the value is kept the same for <24xx and
4448          * >=24xx ISPs. If it is necessary to change it,
4449          * the check should be added for specific ISPs,
4450          * assigning the value appropriately.
4451          */
4452         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4453 }
4454
4455 void
4456 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4457 {
4458         /*
4459          * FC-4 Feature bit 0 indicates target functionality to the name server.
4460          */
4461         if (qla_tgt_mode_enabled(vha)) {
4462                 if (qla_ini_mode_enabled(vha))
4463                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4464                 else
4465                         ct_req->req.rff_id.fc4_feature = BIT_0;
4466         } else if (qla_ini_mode_enabled(vha)) {
4467                 ct_req->req.rff_id.fc4_feature = BIT_1;
4468         }
4469 }
4470
4471 /*
4472  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4473  * @ha: HA context
4474  *
4475  * Beginning of ATIO ring has initialization control block already built
4476  * by nvram config routine.
4477  *
4478  * Returns 0 on success.
4479  */
4480 void
4481 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4482 {
4483         struct qla_hw_data *ha = vha->hw;
4484         uint16_t cnt;
4485         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4486
4487         if (!qla_tgt_mode_enabled(vha))
4488                 return;
4489
4490         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4491                 pkt->u.raw.signature = ATIO_PROCESSED;
4492                 pkt++;
4493         }
4494
4495 }
4496
4497 /*
4498  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4499  * @ha: SCSI driver HA context
4500  */
4501 void
4502 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4503 {
4504         struct qla_hw_data *ha = vha->hw;
4505         struct atio_from_isp *pkt;
4506         int cnt, i;
4507
4508         if (!vha->flags.online)
4509                 return;
4510
4511         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4512                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4513                 cnt = pkt->u.raw.entry_count;
4514
4515                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4516
4517                 for (i = 0; i < cnt; i++) {
4518                         ha->tgt.atio_ring_index++;
4519                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4520                                 ha->tgt.atio_ring_index = 0;
4521                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4522                         } else
4523                                 ha->tgt.atio_ring_ptr++;
4524
4525                         pkt->u.raw.signature = ATIO_PROCESSED;
4526                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4527                 }
4528                 wmb();
4529         }
4530
4531         /* Adjust ring index */
4532         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
4533 }
4534
4535 void
4536 qlt_24xx_config_rings(struct scsi_qla_host *vha)
4537 {
4538         struct qla_hw_data *ha = vha->hw;
4539         if (!QLA_TGT_MODE_ENABLED())
4540                 return;
4541
4542         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
4543         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
4544         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
4545
4546         if (IS_ATIO_MSIX_CAPABLE(ha)) {
4547                 struct qla_msix_entry *msix = &ha->msix_entries[2];
4548                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
4549
4550                 icb->msix_atio = cpu_to_le16(msix->entry);
4551                 ql_dbg(ql_dbg_init, vha, 0xf072,
4552                     "Registering ICB vector 0x%x for atio que.\n",
4553                     msix->entry);
4554         }
4555 }
4556
4557 void
4558 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4559 {
4560         struct qla_hw_data *ha = vha->hw;
4561
4562         if (qla_tgt_mode_enabled(vha)) {
4563                 if (!ha->tgt.saved_set) {
4564                         /* We save only once */
4565                         ha->tgt.saved_exchange_count = nv->exchange_count;
4566                         ha->tgt.saved_firmware_options_1 =
4567                             nv->firmware_options_1;
4568                         ha->tgt.saved_firmware_options_2 =
4569                             nv->firmware_options_2;
4570                         ha->tgt.saved_firmware_options_3 =
4571                             nv->firmware_options_3;
4572                         ha->tgt.saved_set = 1;
4573                 }
4574
4575                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4576
4577                 /* Enable target mode */
4578                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4579
4580                 /* Disable ini mode, if requested */
4581                 if (!qla_ini_mode_enabled(vha))
4582                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4583
4584                 /* Disable Full Login after LIP */
4585                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4586                 /* Enable initial LIP */
4587                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4588                 /* Enable FC tapes support */
4589                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4590                 /* Disable Full Login after LIP */
4591                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4592                 /* Enable target PRLI control */
4593                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4594         } else {
4595                 if (ha->tgt.saved_set) {
4596                         nv->exchange_count = ha->tgt.saved_exchange_count;
4597                         nv->firmware_options_1 =
4598                             ha->tgt.saved_firmware_options_1;
4599                         nv->firmware_options_2 =
4600                             ha->tgt.saved_firmware_options_2;
4601                         nv->firmware_options_3 =
4602                             ha->tgt.saved_firmware_options_3;
4603                 }
4604                 return;
4605         }
4606
4607         /* out-of-order frames reassembly */
4608         nv->firmware_options_3 |= BIT_6|BIT_9;
4609
4610         if (ha->tgt.enable_class_2) {
4611                 if (vha->flags.init_done)
4612                         fc_host_supported_classes(vha->host) =
4613                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4614
4615                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4616         } else {
4617                 if (vha->flags.init_done)
4618                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4619
4620                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4621         }
4622 }
4623
4624 void
4625 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4626         struct init_cb_24xx *icb)
4627 {
4628         struct qla_hw_data *ha = vha->hw;
4629
4630         if (ha->tgt.node_name_set) {
4631                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4632                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4633         }
4634 }
4635
4636 void
4637 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
4638 {
4639         struct qla_hw_data *ha = vha->hw;
4640
4641         if (!QLA_TGT_MODE_ENABLED())
4642                 return;
4643
4644         if (qla_tgt_mode_enabled(vha)) {
4645                 if (!ha->tgt.saved_set) {
4646                         /* We save only once */
4647                         ha->tgt.saved_exchange_count = nv->exchange_count;
4648                         ha->tgt.saved_firmware_options_1 =
4649                             nv->firmware_options_1;
4650                         ha->tgt.saved_firmware_options_2 =
4651                             nv->firmware_options_2;
4652                         ha->tgt.saved_firmware_options_3 =
4653                             nv->firmware_options_3;
4654                         ha->tgt.saved_set = 1;
4655                 }
4656
4657                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4658
4659                 /* Enable target mode */
4660                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4661
4662                 /* Disable ini mode, if requested */
4663                 if (!qla_ini_mode_enabled(vha))
4664                         nv->firmware_options_1 |=
4665                             __constant_cpu_to_le32(BIT_5);
4666
4667                 /* Disable Full Login after LIP */
4668                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4669                 /* Enable initial LIP */
4670                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4671                 /* Enable FC tapes support */
4672                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4673                 /* Disable Full Login after LIP */
4674                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4675                 /* Enable target PRLI control */
4676                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4677         } else {
4678                 if (ha->tgt.saved_set) {
4679                         nv->exchange_count = ha->tgt.saved_exchange_count;
4680                         nv->firmware_options_1 =
4681                             ha->tgt.saved_firmware_options_1;
4682                         nv->firmware_options_2 =
4683                             ha->tgt.saved_firmware_options_2;
4684                         nv->firmware_options_3 =
4685                             ha->tgt.saved_firmware_options_3;
4686                 }
4687                 return;
4688         }
4689
4690         /* out-of-order frames reassembly */
4691         nv->firmware_options_3 |= BIT_6|BIT_9;
4692
4693         if (ha->tgt.enable_class_2) {
4694                 if (vha->flags.init_done)
4695                         fc_host_supported_classes(vha->host) =
4696                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4697
4698                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4699         } else {
4700                 if (vha->flags.init_done)
4701                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4702
4703                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4704         }
4705 }
4706
4707 void
4708 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
4709         struct init_cb_81xx *icb)
4710 {
4711         struct qla_hw_data *ha = vha->hw;
4712
4713         if (!QLA_TGT_MODE_ENABLED())
4714                 return;
4715
4716         if (ha->tgt.node_name_set) {
4717                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4718                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4719         }
4720 }
4721
4722 void
4723 qlt_83xx_iospace_config(struct qla_hw_data *ha)
4724 {
4725         if (!QLA_TGT_MODE_ENABLED())
4726                 return;
4727
4728         ha->msix_count += 1; /* For ATIO Q */
4729 }
4730
4731 int
4732 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4733         struct sts_entry_24xx *pkt)
4734 {
4735         switch (pkt->entry_type) {
4736         case ABTS_RECV_24XX:
4737         case ABTS_RESP_24XX:
4738         case CTIO_TYPE7:
4739         case NOTIFY_ACK_TYPE:
4740                 return 1;
4741         default:
4742                 return 0;
4743         }
4744 }
4745
4746 void
4747 qlt_modify_vp_config(struct scsi_qla_host *vha,
4748         struct vp_config_entry_24xx *vpmod)
4749 {
4750         if (qla_tgt_mode_enabled(vha))
4751                 vpmod->options_idx1 &= ~BIT_5;
4752         /* Disable ini mode, if requested */
4753         if (!qla_ini_mode_enabled(vha))
4754                 vpmod->options_idx1 &= ~BIT_4;
4755 }
4756
4757 void
4758 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4759 {
4760         if (!QLA_TGT_MODE_ENABLED())
4761                 return;
4762
4763         if  (ha->mqenable || IS_QLA83XX(ha)) {
4764                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
4765                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
4766         } else {
4767                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
4768                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
4769         }
4770
4771         mutex_init(&ha->tgt.tgt_mutex);
4772         mutex_init(&ha->tgt.tgt_host_action_mutex);
4773         qlt_clear_mode(base_vha);
4774 }
4775
4776 irqreturn_t
4777 qla83xx_msix_atio_q(int irq, void *dev_id)
4778 {
4779         struct rsp_que *rsp;
4780         scsi_qla_host_t *vha;
4781         struct qla_hw_data *ha;
4782         unsigned long flags;
4783
4784         rsp = (struct rsp_que *) dev_id;
4785         ha = rsp->hw;
4786         vha = pci_get_drvdata(ha->pdev);
4787
4788         spin_lock_irqsave(&ha->hardware_lock, flags);
4789
4790         qlt_24xx_process_atio_queue(vha);
4791         qla24xx_process_response_queue(vha, rsp);
4792
4793         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4794
4795         return IRQ_HANDLED;
4796 }
4797
4798 int
4799 qlt_mem_alloc(struct qla_hw_data *ha)
4800 {
4801         if (!QLA_TGT_MODE_ENABLED())
4802                 return 0;
4803
4804         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4805             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4806         if (!ha->tgt.tgt_vp_map)
4807                 return -ENOMEM;
4808
4809         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4810             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4811             &ha->tgt.atio_dma, GFP_KERNEL);
4812         if (!ha->tgt.atio_ring) {
4813                 kfree(ha->tgt.tgt_vp_map);
4814                 return -ENOMEM;
4815         }
4816         return 0;
4817 }
4818
4819 void
4820 qlt_mem_free(struct qla_hw_data *ha)
4821 {
4822         if (!QLA_TGT_MODE_ENABLED())
4823                 return;
4824
4825         if (ha->tgt.atio_ring) {
4826                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4827                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4828                     ha->tgt.atio_dma);
4829         }
4830         kfree(ha->tgt.tgt_vp_map);
4831 }
4832
4833 /* vport_slock to be held by the caller */
4834 void
4835 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4836 {
4837         if (!QLA_TGT_MODE_ENABLED())
4838                 return;
4839
4840         switch (cmd) {
4841         case SET_VP_IDX:
4842                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4843                 break;
4844         case SET_AL_PA:
4845                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4846                 break;
4847         case RESET_VP_IDX:
4848                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4849                 break;
4850         case RESET_AL_PA:
4851                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4852                 break;
4853         }
4854 }
4855
4856 static int __init qlt_parse_ini_mode(void)
4857 {
4858         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4859                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4860         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4861                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4862         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4863                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4864         else
4865                 return false;
4866
4867         return true;
4868 }
4869
4870 int __init qlt_init(void)
4871 {
4872         int ret;
4873
4874         if (!qlt_parse_ini_mode()) {
4875                 ql_log(ql_log_fatal, NULL, 0xe06b,
4876                     "qlt_parse_ini_mode() failed\n");
4877                 return -EINVAL;
4878         }
4879
4880         if (!QLA_TGT_MODE_ENABLED())
4881                 return 0;
4882
4883         qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4884             sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4885             NULL);
4886         if (!qla_tgt_cmd_cachep) {
4887                 ql_log(ql_log_fatal, NULL, 0xe06c,
4888                     "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4889                 return -ENOMEM;
4890         }
4891
4892         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4893             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4894             qla_tgt_mgmt_cmd), 0, NULL);
4895         if (!qla_tgt_mgmt_cmd_cachep) {
4896                 ql_log(ql_log_fatal, NULL, 0xe06d,
4897                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4898                 ret = -ENOMEM;
4899                 goto out;
4900         }
4901
4902         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4903             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4904         if (!qla_tgt_mgmt_cmd_mempool) {
4905                 ql_log(ql_log_fatal, NULL, 0xe06e,
4906                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4907                 ret = -ENOMEM;
4908                 goto out_mgmt_cmd_cachep;
4909         }
4910
4911         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4912         if (!qla_tgt_wq) {
4913                 ql_log(ql_log_fatal, NULL, 0xe06f,
4914                     "alloc_workqueue for qla_tgt_wq failed\n");
4915                 ret = -ENOMEM;
4916                 goto out_cmd_mempool;
4917         }
4918         /*
4919          * Return 1 to signal that initiator-mode is being disabled
4920          */
4921         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4922
4923 out_cmd_mempool:
4924         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4925 out_mgmt_cmd_cachep:
4926         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4927 out:
4928         kmem_cache_destroy(qla_tgt_cmd_cachep);
4929         return ret;
4930 }
4931
4932 void qlt_exit(void)
4933 {
4934         if (!QLA_TGT_MODE_ENABLED())
4935                 return;
4936
4937         destroy_workqueue(qla_tgt_wq);
4938         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4939         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4940         kmem_cache_destroy(qla_tgt_cmd_cachep);
4941 }