Pileus Git - ~andy/linux/blob - 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) 2010-2011 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/version.h>
  30 #include <linux/blkdev.h>
  31 #include <linux/interrupt.h>
  32 #include <linux/pci.h>
  33 #include <linux/delay.h>
  34 #include <linux/list.h>
  35 #include <linux/workqueue.h>
  36 #include <asm/unaligned.h>
  37 #include <scsi/scsi.h>
  38 #include <scsi/scsi_host.h>
  39 #include <scsi/scsi_tcq.h>
  40 #include <target/target_core_base.h>
  41 #include <target/target_core_fabric.h>
  42
  43 #include "qla_def.h"
  44 #include "qla_target.h"
  45
  46 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  47 module_param(qlini_mode, charp, S_IRUGO);
  48 MODULE_PARM_DESC(qlini_mode,
  49         "Determines when initiator mode will be enabled. Possible values: "
  50         "\"exclusive\" - initiator mode will be enabled on load, "
  51         "disabled on enabling target mode and then on disabling target mode "
  52         "enabled back; "
  53         "\"disabled\" - initiator mode will never be enabled; "
  54         "\"enabled\" (default) - initiator mode will always stay enabled.");
  55
  56 static int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  57
  58 /*
  59  * From scsi/fc/fc_fcp.h
  60  */
  61 enum fcp_resp_rsp_codes {
  62         FCP_TMF_CMPL = 0,
  63         FCP_DATA_LEN_INVALID = 1,
  64         FCP_CMND_FIELDS_INVALID = 2,
  65         FCP_DATA_PARAM_MISMATCH = 3,
  66         FCP_TMF_REJECTED = 4,
  67         FCP_TMF_FAILED = 5,
  68         FCP_TMF_INVALID_LUN = 9,
  69 };
  70
  71 /*
  72  * fc_pri_ta from scsi/fc/fc_fcp.h
  73  */
  74 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  75 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  76 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  77 #define FCP_PTA_ACA         4   /* auto. contigent allegiance */
  78 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  79 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  80 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  81
  82 /*
  83  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  84  * must be called under HW lock and could unlock/lock it inside.
  85  * It isn't an issue, since in the current implementation on the time when
  86  * those functions are called:
  87  *
  88  *   - Either context is IRQ and only IRQ handler can modify HW data,
  89  *     including rings related fields,
  90  *
  91  *   - Or access to target mode variables from struct qla_tgt doesn't
  92  *     cross those functions boundaries, except tgt_stop, which
  93  *     additionally protected by irq_cmd_count.
  94  */
  95 /* Predefs for callbacks handed to qla2xxx LLD */
  96 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
  97         struct atio_from_isp *pkt);
  98 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
  99 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
 100         int fn, void *iocb, int flags);
 101 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 102         *cmd, struct atio_from_isp *atio, int ha_locked);
 103 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 104         struct qla_tgt_srr_imm *imm, int ha_lock);
 105 /*
 106  * Global Variables
 107  */
 108 static struct kmem_cache *qla_tgt_cmd_cachep;
 109 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 110 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 111 static struct workqueue_struct *qla_tgt_wq;
 112 static DEFINE_MUTEX(qla_tgt_mutex);
 113 static LIST_HEAD(qla_tgt_glist);
 114
 115 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 116 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 117         struct qla_tgt *tgt,
 118         const uint8_t *port_name)
 119 {
 120         struct qla_tgt_sess *sess;
 121
 122         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 123                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 124                         return sess;
 125         }
 126
 127         return NULL;
 128 }
 129
 130 /* Might release hw lock, then reaquire!! */
 131 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 132 {
 133         /* Send marker if required */
 134         if (unlikely(vha->marker_needed != 0)) {
 135                 int rc = qla2x00_issue_marker(vha, vha_locked);
 136                 if (rc != QLA_SUCCESS) {
 137                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 138                             "qla_target(%d): issue_marker() failed\n",
 139                             vha->vp_idx);
 140                 }
 141                 return rc;
 142         }
 143         return QLA_SUCCESS;
 144 }
 145
 146 static inline
 147 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 148         uint8_t *d_id)
 149 {
 150         struct qla_hw_data *ha = vha->hw;
 151         uint8_t vp_idx;
 152
 153         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 154                 return NULL;
 155
 156         if (vha->d_id.b.al_pa == d_id[2])
 157                 return vha;
 158
 159         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 160         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 161         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 162                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 163
 164         return NULL;
 165 }
 166
 167 static inline
 168 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 169         uint16_t vp_idx)
 170 {
 171         struct qla_hw_data *ha = vha->hw;
 172
 173         if (vha->vp_idx == vp_idx)
 174                 return vha;
 175
 176         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 177         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 178                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 179
 180         return NULL;
 181 }
 182
 183 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 184         struct atio_from_isp *atio)
 185 {
 186         switch (atio->u.raw.entry_type) {
 187         case ATIO_TYPE7:
 188         {
 189                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 190                     atio->u.isp24.fcp_hdr.d_id);
 191                 if (unlikely(NULL == host)) {
 192                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 193                             "qla_target(%d): Received ATIO_TYPE7 "
 194                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 195                             atio->u.isp24.fcp_hdr.d_id[0],
 196                             atio->u.isp24.fcp_hdr.d_id[1],
 197                             atio->u.isp24.fcp_hdr.d_id[2]);
 198                         break;
 199                 }
 200                 qlt_24xx_atio_pkt(host, atio);
 201                 break;
 202         }
 203
 204         case IMMED_NOTIFY_TYPE:
 205         {
 206                 struct scsi_qla_host *host = vha;
 207                 struct imm_ntfy_from_isp *entry =
 208                     (struct imm_ntfy_from_isp *)atio;
 209
 210                 if ((entry->u.isp24.vp_index != 0xFF) &&
 211                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 212                         host = qlt_find_host_by_vp_idx(vha,
 213                             entry->u.isp24.vp_index);
 214                         if (unlikely(!host)) {
 215                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 216                                     "qla_target(%d): Received "
 217                                     "ATIO (IMMED_NOTIFY_TYPE) "
 218                                     "with unknown vp_index %d\n",
 219                                     vha->vp_idx, entry->u.isp24.vp_index);
 220                                 break;
 221                         }
 222                 }
 223                 qlt_24xx_atio_pkt(host, atio);
 224                 break;
 225         }
 226
 227         default:
 228                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 229                     "qla_target(%d): Received unknown ATIO atio "
 230                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 231                 break;
 232         }
 233
 234         return;
 235 }
 236
 237 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 238 {
 239         switch (pkt->entry_type) {
 240         case CTIO_TYPE7:
 241         {
 242                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 243                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 244                     entry->vp_index);
 245                 if (unlikely(!host)) {
 246                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 247                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 248                             "received, with unknown vp_index %d\n",
 249                             vha->vp_idx, entry->vp_index);
 250                         break;
 251                 }
 252                 qlt_response_pkt(host, pkt);
 253                 break;
 254         }
 255
 256         case IMMED_NOTIFY_TYPE:
 257         {
 258                 struct scsi_qla_host *host = vha;
 259                 struct imm_ntfy_from_isp *entry =
 260                     (struct imm_ntfy_from_isp *)pkt;
 261
 262                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 263                 if (unlikely(!host)) {
 264                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 265                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 266                             "received, with unknown vp_index %d\n",
 267                             vha->vp_idx, entry->u.isp24.vp_index);
 268                         break;
 269                 }
 270                 qlt_response_pkt(host, pkt);
 271                 break;
 272         }
 273
 274         case NOTIFY_ACK_TYPE:
 275         {
 276                 struct scsi_qla_host *host = vha;
 277                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 278
 279                 if (0xFF != entry->u.isp24.vp_index) {
 280                         host = qlt_find_host_by_vp_idx(vha,
 281                             entry->u.isp24.vp_index);
 282                         if (unlikely(!host)) {
 283                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 284                                     "qla_target(%d): Response "
 285                                     "pkt (NOTIFY_ACK_TYPE) "
 286                                     "received, with unknown "
 287                                     "vp_index %d\n", vha->vp_idx,
 288                                     entry->u.isp24.vp_index);
 289                                 break;
 290                         }
 291                 }
 292                 qlt_response_pkt(host, pkt);
 293                 break;
 294         }
 295
 296         case ABTS_RECV_24XX:
 297         {
 298                 struct abts_recv_from_24xx *entry =
 299                     (struct abts_recv_from_24xx *)pkt;
 300                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 301                     entry->vp_index);
 302                 if (unlikely(!host)) {
 303                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 304                             "qla_target(%d): Response pkt "
 305                             "(ABTS_RECV_24XX) received, with unknown "
 306                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 307                         break;
 308                 }
 309                 qlt_response_pkt(host, pkt);
 310                 break;
 311         }
 312
 313         case ABTS_RESP_24XX:
 314         {
 315                 struct abts_resp_to_24xx *entry =
 316                     (struct abts_resp_to_24xx *)pkt;
 317                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 318                     entry->vp_index);
 319                 if (unlikely(!host)) {
 320                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 321                             "qla_target(%d): Response pkt "
 322                             "(ABTS_RECV_24XX) received, with unknown "
 323                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 324                         break;
 325                 }
 326                 qlt_response_pkt(host, pkt);
 327                 break;
 328         }
 329
 330         default:
 331                 qlt_response_pkt(vha, pkt);
 332                 break;
 333         }
 334
 335 }
 336
 337 static void qlt_free_session_done(struct work_struct *work)
 338 {
 339         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 340             free_work);
 341         struct qla_tgt *tgt = sess->tgt;
 342         struct scsi_qla_host *vha = sess->vha;
 343         struct qla_hw_data *ha = vha->hw;
 344
 345         BUG_ON(!tgt);
 346         /*
 347          * Release the target session for FC Nexus from fabric module code.
 348          */
 349         if (sess->se_sess != NULL)
 350                 ha->tgt.tgt_ops->free_session(sess);
 351
 352         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 353             "Unregistration of sess %p finished\n", sess);
 354
 355         kfree(sess);
 356         /*
 357          * We need to protect against race, when tgt is freed before or
 358          * inside wake_up()
 359          */
 360         tgt->sess_count--;
 361         if (tgt->sess_count == 0)
 362                 wake_up_all(&tgt->waitQ);
 363 }
 364
 365 /* ha->hardware_lock supposed to be held on entry */
 366 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 367 {
 368         struct scsi_qla_host *vha = sess->vha;
 369
 370         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 371
 372         list_del(&sess->sess_list_entry);
 373         if (sess->deleted)
 374                 list_del(&sess->del_list_entry);
 375
 376         INIT_WORK(&sess->free_work, qlt_free_session_done);
 377         schedule_work(&sess->free_work);
 378 }
 379 EXPORT_SYMBOL(qlt_unreg_sess);
 380
 381 /* ha->hardware_lock supposed to be held on entry */
 382 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 383 {
 384         struct qla_hw_data *ha = vha->hw;
 385         struct qla_tgt_sess *sess = NULL;
 386         uint32_t unpacked_lun, lun = 0;
 387         uint16_t loop_id;
 388         int res = 0;
 389         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 390         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 391
 392         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 393         if (loop_id == 0xFFFF) {
 394 #if 0 /* FIXME: Re-enable Global event handling.. */
 395                 /* Global event */
 396                 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
 397                 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
 398                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 399                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 400                             typeof(*sess), sess_list_entry);
 401                         switch (mcmd) {
 402                         case QLA_TGT_NEXUS_LOSS_SESS:
 403                                 mcmd = QLA_TGT_NEXUS_LOSS;
 404                                 break;
 405                         case QLA_TGT_ABORT_ALL_SESS:
 406                                 mcmd = QLA_TGT_ABORT_ALL;
 407                                 break;
 408                         case QLA_TGT_NEXUS_LOSS:
 409                         case QLA_TGT_ABORT_ALL:
 410                                 break;
 411                         default:
 412                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 413                                     "qla_target(%d): Not allowed "
 414                                     "command %x in %s", vha->vp_idx,
 415                                     mcmd, __func__);
 416                                 sess = NULL;
 417                                 break;
 418                         }
 419                 } else
 420                         sess = NULL;
 421 #endif
 422         } else {
 423                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 424         }
 425
 426         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 427             "Using sess for qla_tgt_reset: %p\n", sess);
 428         if (!sess) {
 429                 res = -ESRCH;
 430                 return res;
 431         }
 432
 433         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 434             "scsi(%ld): resetting (session %p from port "
 435             "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x, "
 436             "mcmd %x, loop_id %d)\n", vha->host_no, sess,
 437             sess->port_name[0], sess->port_name[1],
 438             sess->port_name[2], sess->port_name[3],
 439             sess->port_name[4], sess->port_name[5],
 440             sess->port_name[6], sess->port_name[7],
 441             mcmd, loop_id);
 442
 443         lun = a->u.isp24.fcp_cmnd.lun;
 444         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 445
 446         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 447             iocb, QLA24XX_MGMT_SEND_NACK);
 448 }
 449
 450 /* ha->hardware_lock supposed to be held on entry */
 451 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 452         bool immediate)
 453 {
 454         struct qla_tgt *tgt = sess->tgt;
 455         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 456
 457         if (sess->deleted)
 458                 return;
 459
 460         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 461             "Scheduling sess %p for deletion\n", sess);
 462         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 463         sess->deleted = 1;
 464
 465         if (immediate)
 466                 dev_loss_tmo = 0;
 467
 468         sess->expires = jiffies + dev_loss_tmo * HZ;
 469
 470         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 471             "qla_target(%d): session for port %02x:%02x:%02x:"
 472             "%02x:%02x:%02x:%02x:%02x (loop ID %d) scheduled for "
 473             "deletion in %u secs (expires: %lu) immed: %d\n",
 474             sess->vha->vp_idx,
 475             sess->port_name[0], sess->port_name[1],
 476             sess->port_name[2], sess->port_name[3],
 477             sess->port_name[4], sess->port_name[5],
 478             sess->port_name[6], sess->port_name[7],
 479             sess->loop_id, dev_loss_tmo, sess->expires, immediate);
 480
 481         if (immediate)
 482                 schedule_delayed_work(&tgt->sess_del_work, 0);
 483         else
 484                 schedule_delayed_work(&tgt->sess_del_work,
 485                     jiffies - sess->expires);
 486 }
 487
 488 /* ha->hardware_lock supposed to be held on entry */
 489 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
 490 {
 491         struct qla_tgt_sess *sess;
 492
 493         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 494                 qlt_schedule_sess_for_deletion(sess, true);
 495
 496         /* At this point tgt could be already dead */
 497 }
 498
 499 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 500         uint16_t *loop_id)
 501 {
 502         struct qla_hw_data *ha = vha->hw;
 503         dma_addr_t gid_list_dma;
 504         struct gid_list_info *gid_list;
 505         char *id_iter;
 506         int res, rc, i;
 507         uint16_t entries;
 508
 509         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 510             &gid_list_dma, GFP_KERNEL);
 511         if (!gid_list) {
 512                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 513                     "qla_target(%d): DMA Alloc failed of %u\n",
 514                     vha->vp_idx, qla2x00_gid_list_size(ha));
 515                 return -ENOMEM;
 516         }
 517
 518         /* Get list of logged in devices */
 519         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 520         if (rc != QLA_SUCCESS) {
 521                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 522                     "qla_target(%d): get_id_list() failed: %x\n",
 523                     vha->vp_idx, rc);
 524                 res = -1;
 525                 goto out_free_id_list;
 526         }
 527
 528         id_iter = (char *)gid_list;
 529         res = -1;
 530         for (i = 0; i < entries; i++) {
 531                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 532                 if ((gid->al_pa == s_id[2]) &&
 533                     (gid->area == s_id[1]) &&
 534                     (gid->domain == s_id[0])) {
 535                         *loop_id = le16_to_cpu(gid->loop_id);
 536                         res = 0;
 537                         break;
 538                 }
 539                 id_iter += ha->gid_list_info_size;
 540         }
 541
 542 out_free_id_list:
 543         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 544             gid_list, gid_list_dma);
 545         return res;
 546 }
 547
 548 static bool qlt_check_fcport_exist(struct scsi_qla_host *vha,
 549         struct qla_tgt_sess *sess)
 550 {
 551         struct qla_hw_data *ha = vha->hw;
 552         struct qla_port_24xx_data *pmap24;
 553         bool res, found = false;
 554         int rc, i;
 555         uint16_t loop_id = 0xFFFF; /* to eliminate compiler's warning */
 556         uint16_t entries;
 557         void *pmap;
 558         int pmap_len;
 559         fc_port_t *fcport;
 560         int global_resets;
 561
 562 retry:
 563         global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
 564
 565         rc = qla2x00_get_node_name_list(vha, &pmap, &pmap_len);
 566         if (rc != QLA_SUCCESS) {
 567                 res = false;
 568                 goto out;
 569         }
 570
 571         pmap24 = pmap;
 572         entries = pmap_len/sizeof(*pmap24);
 573
 574         for (i = 0; i < entries; ++i) {
 575                 if (!memcmp(sess->port_name, pmap24[i].port_name, WWN_SIZE)) {
 576                         loop_id = le16_to_cpu(pmap24[i].loop_id);
 577                         found = true;
 578                         break;
 579                 }
 580         }
 581
 582         kfree(pmap);
 583
 584         if (!found) {
 585                 res = false;
 586                 goto out;
 587         }
 588
 589         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf046,
 590             "qlt_check_fcport_exist(): loop_id %d", loop_id);
 591
 592         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
 593         if (fcport == NULL) {
 594                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf047,
 595                     "qla_target(%d): Allocation of tmp FC port failed",
 596                     vha->vp_idx);
 597                 res = false;
 598                 goto out;
 599         }
 600
 601         fcport->loop_id = loop_id;
 602
 603         rc = qla2x00_get_port_database(vha, fcport, 0);
 604         if (rc != QLA_SUCCESS) {
 605                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf048,
 606                     "qla_target(%d): Failed to retrieve fcport "
 607                     "information -- get_port_database() returned %x "
 608                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
 609                 res = false;
 610                 goto out_free_fcport;
 611         }
 612
 613         if (global_resets !=
 614             atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
 615                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf002,
 616                     "qla_target(%d): global reset during session discovery"
 617                     " (counter was %d, new %d), retrying",
 618                     vha->vp_idx, global_resets,
 619                     atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
 620                 goto retry;
 621         }
 622
 623         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf003,
 624             "Updating sess %p s_id %x:%x:%x, loop_id %d) to d_id %x:%x:%x, "
 625             "loop_id %d", sess, sess->s_id.b.domain, sess->s_id.b.al_pa,
 626             sess->s_id.b.area, sess->loop_id, fcport->d_id.b.domain,
 627             fcport->d_id.b.al_pa, fcport->d_id.b.area, fcport->loop_id);
 628
 629         sess->s_id = fcport->d_id;
 630         sess->loop_id = fcport->loop_id;
 631         sess->conf_compl_supported = !!(fcport->flags &
 632             FCF_CONF_COMP_SUPPORTED);
 633
 634         res = true;
 635
 636 out_free_fcport:
 637         kfree(fcport);
 638
 639 out:
 640         return res;
 641 }
 642
 643 /* ha->hardware_lock supposed to be held on entry */
 644 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 645 {
 646         BUG_ON(!sess->deleted);
 647
 648         list_del(&sess->del_list_entry);
 649         sess->deleted = 0;
 650 }
 651
 652 static void qlt_del_sess_work_fn(struct delayed_work *work)
 653 {
 654         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 655             sess_del_work);
 656         struct scsi_qla_host *vha = tgt->vha;
 657         struct qla_hw_data *ha = vha->hw;
 658         struct qla_tgt_sess *sess;
 659         unsigned long flags;
 660
 661         spin_lock_irqsave(&ha->hardware_lock, flags);
 662         while (!list_empty(&tgt->del_sess_list)) {
 663                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 664                     del_list_entry);
 665                 if (time_after_eq(jiffies, sess->expires)) {
 666                         bool cancel;
 667
 668                         qlt_undelete_sess(sess);
 669
 670                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 671                         cancel = qlt_check_fcport_exist(vha, sess);
 672
 673                         if (cancel) {
 674                                 if (sess->deleted) {
 675                                         /*
 676                                          * sess was again deleted while we were
 677                                          * discovering it
 678                                          */
 679                                         spin_lock_irqsave(&ha->hardware_lock,
 680                                             flags);
 681                                         continue;
 682                                 }
 683
 684                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf049,
 685                                     "qla_target(%d): cancel deletion of "
 686                                     "session for port %02x:%02x:%02x:%02x:%02x:"
 687                                     "%02x:%02x:%02x (loop ID %d), because "
 688                                     " it isn't deleted by firmware",
 689                                     vha->vp_idx, sess->port_name[0],
 690                                     sess->port_name[1], sess->port_name[2],
 691                                     sess->port_name[3], sess->port_name[4],
 692                                     sess->port_name[5], sess->port_name[6],
 693                                     sess->port_name[7], sess->loop_id);
 694                         } else {
 695                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 696                                     "Timeout: sess %p about to be deleted\n",
 697                                     sess);
 698                                 ha->tgt.tgt_ops->shutdown_sess(sess);
 699                                 ha->tgt.tgt_ops->put_sess(sess);
 700                         }
 701
 702                         spin_lock_irqsave(&ha->hardware_lock, flags);
 703                 } else {
 704                         schedule_delayed_work(&tgt->sess_del_work,
 705                             jiffies - sess->expires);
 706                         break;
 707                 }
 708         }
 709         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 710 }
 711
 712 /*
 713  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 714  * Caller must put it.
 715  */
 716 static struct qla_tgt_sess *qlt_create_sess(
 717         struct scsi_qla_host *vha,
 718         fc_port_t *fcport,
 719         bool local)
 720 {
 721         struct qla_hw_data *ha = vha->hw;
 722         struct qla_tgt_sess *sess;
 723         unsigned long flags;
 724         unsigned char be_sid[3];
 725
 726         /* Check to avoid double sessions */
 727         spin_lock_irqsave(&ha->hardware_lock, flags);
 728         list_for_each_entry(sess, &ha->tgt.qla_tgt->sess_list,
 729                                 sess_list_entry) {
 730                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 731                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 732                             "Double sess %p found (s_id %x:%x:%x, "
 733                             "loop_id %d), updating to d_id %x:%x:%x, "
 734                             "loop_id %d", sess, sess->s_id.b.domain,
 735                             sess->s_id.b.al_pa, sess->s_id.b.area,
 736                             sess->loop_id, fcport->d_id.b.domain,
 737                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 738                             fcport->loop_id);
 739
 740                         if (sess->deleted)
 741                                 qlt_undelete_sess(sess);
 742
 743                         kref_get(&sess->se_sess->sess_kref);
 744                         sess->s_id = fcport->d_id;
 745                         sess->loop_id = fcport->loop_id;
 746                         sess->conf_compl_supported = !!(fcport->flags &
 747                             FCF_CONF_COMP_SUPPORTED);
 748                         if (sess->local && !local)
 749                                 sess->local = 0;
 750                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 751
 752                         return sess;
 753                 }
 754         }
 755         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 756
 757         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 758         if (!sess) {
 759                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 760                     "qla_target(%u): session allocation failed, "
 761                     "all commands from port %02x:%02x:%02x:%02x:"
 762                     "%02x:%02x:%02x:%02x will be refused", vha->vp_idx,
 763                     fcport->port_name[0], fcport->port_name[1],
 764                     fcport->port_name[2], fcport->port_name[3],
 765                     fcport->port_name[4], fcport->port_name[5],
 766                     fcport->port_name[6], fcport->port_name[7]);
 767
 768                 return NULL;
 769         }
 770         sess->tgt = ha->tgt.qla_tgt;
 771         sess->vha = vha;
 772         sess->s_id = fcport->d_id;
 773         sess->loop_id = fcport->loop_id;
 774         sess->local = local;
 775
 776         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 777             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 778             sess, ha->tgt.qla_tgt);
 779
 780         be_sid[0] = sess->s_id.b.domain;
 781         be_sid[1] = sess->s_id.b.area;
 782         be_sid[2] = sess->s_id.b.al_pa;
 783         /*
 784          * Determine if this fc_port->port_name is allowed to access
 785          * target mode using explict NodeACLs+MappedLUNs, or using
 786          * TPG demo mode.  If this is successful a target mode FC nexus
 787          * is created.
 788          */
 789         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 790             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 791                 kfree(sess);
 792                 return NULL;
 793         }
 794         /*
 795          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 796          * access across ->hardware_lock reaquire.
 797          */
 798         kref_get(&sess->se_sess->sess_kref);
 799
 800         sess->conf_compl_supported = !!(fcport->flags &
 801             FCF_CONF_COMP_SUPPORTED);
 802         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 803         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 804
 805         spin_lock_irqsave(&ha->hardware_lock, flags);
 806         list_add_tail(&sess->sess_list_entry, &ha->tgt.qla_tgt->sess_list);
 807         ha->tgt.qla_tgt->sess_count++;
 808         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 809
 810         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 811             "qla_target(%d): %ssession for wwn %02x:%02x:%02x:%02x:"
 812             "%02x:%02x:%02x:%02x (loop_id %d, s_id %x:%x:%x, confirmed"
 813             " completion %ssupported) added\n",
 814             vha->vp_idx, local ?  "local " : "", fcport->port_name[0],
 815             fcport->port_name[1], fcport->port_name[2], fcport->port_name[3],
 816             fcport->port_name[4], fcport->port_name[5], fcport->port_name[6],
 817             fcport->port_name[7], fcport->loop_id, sess->s_id.b.domain,
 818             sess->s_id.b.area, sess->s_id.b.al_pa, sess->conf_compl_supported ?
 819             "" : "not ");
 820
 821         return sess;
 822 }
 823
 824 /*
 825  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 826  */
 827 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 828 {
 829         struct qla_hw_data *ha = vha->hw;
 830         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 831         struct qla_tgt_sess *sess;
 832         unsigned long flags;
 833
 834         if (!vha->hw->tgt.tgt_ops)
 835                 return;
 836
 837         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 838                 return;
 839
 840         spin_lock_irqsave(&ha->hardware_lock, flags);
 841         if (tgt->tgt_stop) {
 842                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 843                 return;
 844         }
 845         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 846         if (!sess) {
 847                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 848
 849                 mutex_lock(&ha->tgt.tgt_mutex);
 850                 sess = qlt_create_sess(vha, fcport, false);
 851                 mutex_unlock(&ha->tgt.tgt_mutex);
 852
 853                 spin_lock_irqsave(&ha->hardware_lock, flags);
 854         } else {
 855                 kref_get(&sess->se_sess->sess_kref);
 856
 857                 if (sess->deleted) {
 858                         qlt_undelete_sess(sess);
 859
 860                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 861                             "qla_target(%u): %ssession for port %02x:"
 862                             "%02x:%02x:%02x:%02x:%02x:%02x:%02x (loop ID %d) "
 863                             "reappeared\n", vha->vp_idx, sess->local ? "local "
 864                             : "", sess->port_name[0], sess->port_name[1],
 865                             sess->port_name[2], sess->port_name[3],
 866                             sess->port_name[4], sess->port_name[5],
 867                             sess->port_name[6], sess->port_name[7],
 868                             sess->loop_id);
 869
 870                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 871                             "Reappeared sess %p\n", sess);
 872                 }
 873                 sess->s_id = fcport->d_id;
 874                 sess->loop_id = fcport->loop_id;
 875                 sess->conf_compl_supported = !!(fcport->flags &
 876                     FCF_CONF_COMP_SUPPORTED);
 877         }
 878
 879         if (sess && sess->local) {
 880                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 881                     "qla_target(%u): local session for "
 882                     "port %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x "
 883                     "(loop ID %d) became global\n", vha->vp_idx,
 884                     fcport->port_name[0], fcport->port_name[1],
 885                     fcport->port_name[2], fcport->port_name[3],
 886                     fcport->port_name[4], fcport->port_name[5],
 887                     fcport->port_name[6], fcport->port_name[7],
 888                     sess->loop_id);
 889                 sess->local = 0;
 890         }
 891         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 892
 893         ha->tgt.tgt_ops->put_sess(sess);
 894 }
 895
 896 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 897 {
 898         struct qla_hw_data *ha = vha->hw;
 899         struct qla_tgt *tgt = ha->tgt.qla_tgt;
 900         struct qla_tgt_sess *sess;
 901         unsigned long flags;
 902
 903         if (!vha->hw->tgt.tgt_ops)
 904                 return;
 905
 906         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 907                 return;
 908
 909         spin_lock_irqsave(&ha->hardware_lock, flags);
 910         if (tgt->tgt_stop) {
 911                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 912                 return;
 913         }
 914         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 915         if (!sess) {
 916                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 917                 return;
 918         }
 919
 920         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 921
 922         sess->local = 1;
 923         qlt_schedule_sess_for_deletion(sess, false);
 924         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 925 }
 926
 927 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 928 {
 929         struct qla_hw_data *ha = tgt->ha;
 930         unsigned long flags;
 931         int res;
 932         /*
 933          * We need to protect against race, when tgt is freed before or
 934          * inside wake_up()
 935          */
 936         spin_lock_irqsave(&ha->hardware_lock, flags);
 937         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 938             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 939             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 940         res = (tgt->sess_count == 0);
 941         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 942
 943         return res;
 944 }
 945
 946 /* Called by tcm_qla2xxx configfs code */
 947 void qlt_stop_phase1(struct qla_tgt *tgt)
 948 {
 949         struct scsi_qla_host *vha = tgt->vha;
 950         struct qla_hw_data *ha = tgt->ha;
 951         unsigned long flags;
 952
 953         if (tgt->tgt_stop || tgt->tgt_stopped) {
 954                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 955                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 956                 dump_stack();
 957                 return;
 958         }
 959
 960         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 961             vha->host_no, vha);
 962         /*
 963          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 964          * Lock is needed, because we still can get an incoming packet.
 965          */
 966         mutex_lock(&ha->tgt.tgt_mutex);
 967         spin_lock_irqsave(&ha->hardware_lock, flags);
 968         tgt->tgt_stop = 1;
 969         qlt_clear_tgt_db(tgt, true);
 970         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 971         mutex_unlock(&ha->tgt.tgt_mutex);
 972
 973         flush_delayed_work_sync(&tgt->sess_del_work);
 974
 975         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 976             "Waiting for sess works (tgt %p)", tgt);
 977         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 978         while (!list_empty(&tgt->sess_works_list)) {
 979                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 980                 flush_scheduled_work();
 981                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 982         }
 983         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 984
 985         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 986             "Waiting for tgt %p: list_empty(sess_list)=%d "
 987             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 988             tgt->sess_count);
 989
 990         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 991
 992         /* Big hammer */
 993         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 994                 qlt_disable_vha(vha);
 995
 996         /* Wait for sessions to clear out (just in case) */
 997         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 998 }
 999 EXPORT_SYMBOL(qlt_stop_phase1);
1000
1001 /* Called by tcm_qla2xxx configfs code */
1002 void qlt_stop_phase2(struct qla_tgt *tgt)
1003 {
1004         struct qla_hw_data *ha = tgt->ha;
1005         unsigned long flags;
1006
1007         if (tgt->tgt_stopped) {
1008                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf04f,
1009                     "Already in tgt->tgt_stopped state\n");
1010                 dump_stack();
1011                 return;
1012         }
1013
1014         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00b,
1015             "Waiting for %d IRQ commands to complete (tgt %p)",
1016             tgt->irq_cmd_count, tgt);
1017
1018         mutex_lock(&ha->tgt.tgt_mutex);
1019         spin_lock_irqsave(&ha->hardware_lock, flags);
1020         while (tgt->irq_cmd_count != 0) {
1021                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1022                 udelay(2);
1023                 spin_lock_irqsave(&ha->hardware_lock, flags);
1024         }
1025         tgt->tgt_stop = 0;
1026         tgt->tgt_stopped = 1;
1027         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1028         mutex_unlock(&ha->tgt.tgt_mutex);
1029
1030         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00c, "Stop of tgt %p finished",
1031             tgt);
1032 }
1033 EXPORT_SYMBOL(qlt_stop_phase2);
1034
1035 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
1036 void qlt_release(struct qla_tgt *tgt)
1037 {
1038         struct qla_hw_data *ha = tgt->ha;
1039
1040         if ((ha->tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
1041                 qlt_stop_phase2(tgt);
1042
1043         ha->tgt.qla_tgt = NULL;
1044
1045         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00d,
1046             "Release of tgt %p finished\n", tgt);
1047
1048         kfree(tgt);
1049 }
1050
1051 /* ha->hardware_lock supposed to be held on entry */
1052 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
1053         const void *param, unsigned int param_size)
1054 {
1055         struct qla_tgt_sess_work_param *prm;
1056         unsigned long flags;
1057
1058         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
1059         if (!prm) {
1060                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
1061                     "qla_target(%d): Unable to create session "
1062                     "work, command will be refused", 0);
1063                 return -ENOMEM;
1064         }
1065
1066         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
1067             "Scheduling work (type %d, prm %p)"
1068             " to find session for param %p (size %d, tgt %p)\n",
1069             type, prm, param, param_size, tgt);
1070
1071         prm->type = type;
1072         memcpy(&prm->tm_iocb, param, param_size);
1073
1074         spin_lock_irqsave(&tgt->sess_work_lock, flags);
1075         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
1076         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
1077
1078         schedule_work(&tgt->sess_work);
1079
1080         return 0;
1081 }
1082
1083 /*
1084  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1085  */
1086 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
1087         struct imm_ntfy_from_isp *ntfy,
1088         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
1089         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
1090 {
1091         struct qla_hw_data *ha = vha->hw;
1092         request_t *pkt;
1093         struct nack_to_isp *nack;
1094
1095         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
1096
1097         /* Send marker if required */
1098         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1099                 return;
1100
1101         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
1102         if (!pkt) {
1103                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
1104                     "qla_target(%d): %s failed: unable to allocate "
1105                     "request packet\n", vha->vp_idx, __func__);
1106                 return;
1107         }
1108
1109         if (ha->tgt.qla_tgt != NULL)
1110                 ha->tgt.qla_tgt->notify_ack_expected++;
1111
1112         pkt->entry_type = NOTIFY_ACK_TYPE;
1113         pkt->entry_count = 1;
1114
1115         nack = (struct nack_to_isp *)pkt;
1116         nack->ox_id = ntfy->ox_id;
1117
1118         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
1119         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
1120                 nack->u.isp24.flags = ntfy->u.isp24.flags &
1121                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
1122         }
1123         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
1124         nack->u.isp24.status = ntfy->u.isp24.status;
1125         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
1126         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
1127         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
1128         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
1129         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
1130         nack->u.isp24.srr_reject_code = srr_reject_code;
1131         nack->u.isp24.srr_reject_code_expl = srr_explan;
1132         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
1133
1134         ql_dbg(ql_dbg_tgt, vha, 0xe005,
1135             "qla_target(%d): Sending 24xx Notify Ack %d\n",
1136             vha->vp_idx, nack->u.isp24.status);
1137
1138         qla2x00_start_iocbs(vha, vha->req);
1139 }
1140
1141 /*
1142  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1143  */
1144 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
1145         struct abts_recv_from_24xx *abts, uint32_t status,
1146         bool ids_reversed)
1147 {
1148         struct qla_hw_data *ha = vha->hw;
1149         struct abts_resp_to_24xx *resp;
1150         uint32_t f_ctl;
1151         uint8_t *p;
1152
1153         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1154             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1155             ha, abts, status);
1156
1157         /* Send marker if required */
1158         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1159                 return;
1160
1161         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1162         if (!resp) {
1163                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1164                     "qla_target(%d): %s failed: unable to allocate "
1165                     "request packet", vha->vp_idx, __func__);
1166                 return;
1167         }
1168
1169         resp->entry_type = ABTS_RESP_24XX;
1170         resp->entry_count = 1;
1171         resp->nport_handle = abts->nport_handle;
1172         resp->vp_index = vha->vp_idx;
1173         resp->sof_type = abts->sof_type;
1174         resp->exchange_address = abts->exchange_address;
1175         resp->fcp_hdr_le = abts->fcp_hdr_le;
1176         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1177             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1178             F_CTL_SEQ_INITIATIVE);
1179         p = (uint8_t *)&f_ctl;
1180         resp->fcp_hdr_le.f_ctl[0] = *p++;
1181         resp->fcp_hdr_le.f_ctl[1] = *p++;
1182         resp->fcp_hdr_le.f_ctl[2] = *p;
1183         if (ids_reversed) {
1184                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1185                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1186                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1187                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1188                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1189                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1190         } else {
1191                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1192                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1193                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1194                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1195                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1196                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1197         }
1198         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1199         if (status == FCP_TMF_CMPL) {
1200                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1201                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1202                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1203                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1204                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1205                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1206         } else {
1207                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1208                 resp->payload.ba_rjt.reason_code =
1209                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1210                 /* Other bytes are zero */
1211         }
1212
1213         ha->tgt.qla_tgt->abts_resp_expected++;
1214
1215         qla2x00_start_iocbs(vha, vha->req);
1216 }
1217
1218 /*
1219  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1220  */
1221 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1222         struct abts_resp_from_24xx_fw *entry)
1223 {
1224         struct ctio7_to_24xx *ctio;
1225
1226         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1227             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1228         /* Send marker if required */
1229         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1230                 return;
1231
1232         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1233         if (ctio == NULL) {
1234                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1235                     "qla_target(%d): %s failed: unable to allocate "
1236                     "request packet\n", vha->vp_idx, __func__);
1237                 return;
1238         }
1239
1240         /*
1241          * We've got on entrance firmware's response on by us generated
1242          * ABTS response. So, in it ID fields are reversed.
1243          */
1244
1245         ctio->entry_type = CTIO_TYPE7;
1246         ctio->entry_count = 1;
1247         ctio->nport_handle = entry->nport_handle;
1248         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1249         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1250         ctio->vp_index = vha->vp_idx;
1251         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1252         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1253         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1254         ctio->exchange_addr = entry->exchange_addr_to_abort;
1255         ctio->u.status1.flags =
1256             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1257                 CTIO7_FLAGS_TERMINATE);
1258         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1259
1260         qla2x00_start_iocbs(vha, vha->req);
1261
1262         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1263             FCP_TMF_CMPL, true);
1264 }
1265
1266 /* ha->hardware_lock supposed to be held on entry */
1267 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1268         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1269 {
1270         struct qla_hw_data *ha = vha->hw;
1271         struct qla_tgt_mgmt_cmd *mcmd;
1272         int rc;
1273
1274         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1275             "qla_target(%d): task abort (tag=%d)\n",
1276             vha->vp_idx, abts->exchange_addr_to_abort);
1277
1278         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1279         if (mcmd == NULL) {
1280                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1281                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1282                     vha->vp_idx, __func__);
1283                 return -ENOMEM;
1284         }
1285         memset(mcmd, 0, sizeof(*mcmd));
1286
1287         mcmd->sess = sess;
1288         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1289
1290         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, 0, TMR_ABORT_TASK,
1291             abts->exchange_addr_to_abort);
1292         if (rc != 0) {
1293                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1294                     "qla_target(%d):  tgt_ops->handle_tmr()"
1295                     " failed: %d", vha->vp_idx, rc);
1296                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1297                 return -EFAULT;
1298         }
1299
1300         return 0;
1301 }
1302
1303 /*
1304  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1305  */
1306 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1307         struct abts_recv_from_24xx *abts)
1308 {
1309         struct qla_hw_data *ha = vha->hw;
1310         struct qla_tgt_sess *sess;
1311         uint32_t tag = abts->exchange_addr_to_abort;
1312         uint8_t s_id[3];
1313         int rc;
1314
1315         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1316                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1317                     "qla_target(%d): ABTS: Abort Sequence not "
1318                     "supported\n", vha->vp_idx);
1319                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1320                 return;
1321         }
1322
1323         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1324                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1325                     "qla_target(%d): ABTS: Unknown Exchange "
1326                     "Address received\n", vha->vp_idx);
1327                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1328                 return;
1329         }
1330
1331         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1332             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1333             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1334             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1335             le32_to_cpu(abts->fcp_hdr_le.parameter));
1336
1337         s_id[0] = abts->fcp_hdr_le.s_id[2];
1338         s_id[1] = abts->fcp_hdr_le.s_id[1];
1339         s_id[2] = abts->fcp_hdr_le.s_id[0];
1340
1341         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1342         if (!sess) {
1343                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1344                     "qla_target(%d): task abort for non-existant session\n",
1345                     vha->vp_idx);
1346                 rc = qlt_sched_sess_work(ha->tgt.qla_tgt,
1347                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1348                 if (rc != 0) {
1349                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1350                             false);
1351                 }
1352                 return;
1353         }
1354
1355         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1356         if (rc != 0) {
1357                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1358                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1359                     vha->vp_idx, rc);
1360                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1361                 return;
1362         }
1363 }
1364
1365 /*
1366  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1367  */
1368 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1369         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1370 {
1371         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1372         struct ctio7_to_24xx *ctio;
1373
1374         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1375             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1376             ha, atio, resp_code);
1377
1378         /* Send marker if required */
1379         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1380                 return;
1381
1382         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1383         if (ctio == NULL) {
1384                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1385                     "qla_target(%d): %s failed: unable to allocate "
1386                     "request packet\n", ha->vp_idx, __func__);
1387                 return;
1388         }
1389
1390         ctio->entry_type = CTIO_TYPE7;
1391         ctio->entry_count = 1;
1392         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1393         ctio->nport_handle = mcmd->sess->loop_id;
1394         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1395         ctio->vp_index = ha->vp_idx;
1396         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1397         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1398         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1399         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1400         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1401             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1402                 CTIO7_FLAGS_SEND_STATUS);
1403         ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1404         ctio->u.status1.scsi_status =
1405             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1406         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1407         ((uint32_t *)ctio->u.status1.sense_data)[0] = cpu_to_be32(resp_code);
1408
1409         qla2x00_start_iocbs(ha, ha->req);
1410 }
1411
1412 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1413 {
1414         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1415 }
1416 EXPORT_SYMBOL(qlt_free_mcmd);
1417
1418 /* callback from target fabric module code */
1419 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1420 {
1421         struct scsi_qla_host *vha = mcmd->sess->vha;
1422         struct qla_hw_data *ha = vha->hw;
1423         unsigned long flags;
1424
1425         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1426             "TM response mcmd (%p) status %#x state %#x",
1427             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1428
1429         spin_lock_irqsave(&ha->hardware_lock, flags);
1430         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1431                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1432                     0, 0, 0, 0, 0, 0);
1433         else {
1434                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1435                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1436                             mcmd->fc_tm_rsp, false);
1437                 else
1438                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1439                             mcmd->fc_tm_rsp);
1440         }
1441         /*
1442          * Make the callback for ->free_mcmd() to queue_work() and invoke
1443          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1444          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1445          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1446          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1447          * qlt_xmit_tm_rsp() returns here..
1448          */
1449         ha->tgt.tgt_ops->free_mcmd(mcmd);
1450         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1451 }
1452 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1453
1454 /* No locks */
1455 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1456 {
1457         struct qla_tgt_cmd *cmd = prm->cmd;
1458
1459         BUG_ON(cmd->sg_cnt == 0);
1460
1461         prm->sg = (struct scatterlist *)cmd->sg;
1462         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1463             cmd->sg_cnt, cmd->dma_data_direction);
1464         if (unlikely(prm->seg_cnt == 0))
1465                 goto out_err;
1466
1467         prm->cmd->sg_mapped = 1;
1468
1469         /*
1470          * If greater than four sg entries then we need to allocate
1471          * the continuation entries
1472          */
1473         if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1474                 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1475                     prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1476
1477         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1478             prm->seg_cnt, prm->req_cnt);
1479         return 0;
1480
1481 out_err:
1482         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1483             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1484             0, prm->cmd->sg_cnt);
1485         return -1;
1486 }
1487
1488 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1489         struct qla_tgt_cmd *cmd)
1490 {
1491         struct qla_hw_data *ha = vha->hw;
1492
1493         BUG_ON(!cmd->sg_mapped);
1494         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1495         cmd->sg_mapped = 0;
1496 }
1497
1498 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1499         uint32_t req_cnt)
1500 {
1501         struct qla_hw_data *ha = vha->hw;
1502         device_reg_t __iomem *reg = ha->iobase;
1503         uint32_t cnt;
1504
1505         if (vha->req->cnt < (req_cnt + 2)) {
1506                 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1507
1508                 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1509                     "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1510                     "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1511                     vha->req->ring_index, vha->req->cnt, req_cnt);
1512                 if  (vha->req->ring_index < cnt)
1513                         vha->req->cnt = cnt - vha->req->ring_index;
1514                 else
1515                         vha->req->cnt = vha->req->length -
1516                             (vha->req->ring_index - cnt);
1517         }
1518
1519         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1520                 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1521                     "qla_target(%d): There is no room in the "
1522                     "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1523                     "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1524                     vha->req->cnt, req_cnt);
1525                 return -EAGAIN;
1526         }
1527         vha->req->cnt -= req_cnt;
1528
1529         return 0;
1530 }
1531
1532 /*
1533  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1534  */
1535 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1536 {
1537         /* Adjust ring index. */
1538         vha->req->ring_index++;
1539         if (vha->req->ring_index == vha->req->length) {
1540                 vha->req->ring_index = 0;
1541                 vha->req->ring_ptr = vha->req->ring;
1542         } else {
1543                 vha->req->ring_ptr++;
1544         }
1545         return (cont_entry_t *)vha->req->ring_ptr;
1546 }
1547
1548 /* ha->hardware_lock supposed to be held on entry */
1549 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1550 {
1551         struct qla_hw_data *ha = vha->hw;
1552         uint32_t h;
1553
1554         h = ha->tgt.current_handle;
1555         /* always increment cmd handle */
1556         do {
1557                 ++h;
1558                 if (h > MAX_OUTSTANDING_COMMANDS)
1559                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1560                 if (h == ha->tgt.current_handle) {
1561                         ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1562                             "qla_target(%d): Ran out of "
1563                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1564                         h = QLA_TGT_NULL_HANDLE;
1565                         break;
1566                 }
1567         } while ((h == QLA_TGT_NULL_HANDLE) ||
1568             (h == QLA_TGT_SKIP_HANDLE) ||
1569             (ha->tgt.cmds[h-1] != NULL));
1570
1571         if (h != QLA_TGT_NULL_HANDLE)
1572                 ha->tgt.current_handle = h;
1573
1574         return h;
1575 }
1576
1577 /* ha->hardware_lock supposed to be held on entry */
1578 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1579         struct scsi_qla_host *vha)
1580 {
1581         uint32_t h;
1582         struct ctio7_to_24xx *pkt;
1583         struct qla_hw_data *ha = vha->hw;
1584         struct atio_from_isp *atio = &prm->cmd->atio;
1585
1586         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1587         prm->pkt = pkt;
1588         memset(pkt, 0, sizeof(*pkt));
1589
1590         pkt->entry_type = CTIO_TYPE7;
1591         pkt->entry_count = (uint8_t)prm->req_cnt;
1592         pkt->vp_index = vha->vp_idx;
1593
1594         h = qlt_make_handle(vha);
1595         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1596                 /*
1597                  * CTIO type 7 from the firmware doesn't provide a way to
1598                  * know the initiator's LOOP ID, hence we can't find
1599                  * the session and, so, the command.
1600                  */
1601                 return -EAGAIN;
1602         } else
1603                 ha->tgt.cmds[h-1] = prm->cmd;
1604
1605         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1606         pkt->nport_handle = prm->cmd->loop_id;
1607         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1608         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1609         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1610         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1611         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1612         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1613         pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1614         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1615
1616         ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1617             "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1618             vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1619             le16_to_cpu(pkt->u.status0.ox_id));
1620         return 0;
1621 }
1622
1623 /*
1624  * ha->hardware_lock supposed to be held on entry. We have already made sure
1625  * that there is sufficient amount of request entries to not drop it.
1626  */
1627 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1628         struct scsi_qla_host *vha)
1629 {
1630         int cnt;
1631         uint32_t *dword_ptr;
1632         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1633
1634         /* Build continuation packets */
1635         while (prm->seg_cnt > 0) {
1636                 cont_a64_entry_t *cont_pkt64 =
1637                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1638
1639                 /*
1640                  * Make sure that from cont_pkt64 none of
1641                  * 64-bit specific fields used for 32-bit
1642                  * addressing. Cast to (cont_entry_t *) for
1643                  * that.
1644                  */
1645
1646                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1647
1648                 cont_pkt64->entry_count = 1;
1649                 cont_pkt64->sys_define = 0;
1650
1651                 if (enable_64bit_addressing) {
1652                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1653                         dword_ptr =
1654                             (uint32_t *)&cont_pkt64->dseg_0_address;
1655                 } else {
1656                         cont_pkt64->entry_type = CONTINUE_TYPE;
1657                         dword_ptr =
1658                             (uint32_t *)&((cont_entry_t *)
1659                                 cont_pkt64)->dseg_0_address;
1660                 }
1661
1662                 /* Load continuation entry data segments */
1663                 for (cnt = 0;
1664                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1665                     cnt++, prm->seg_cnt--) {
1666                         *dword_ptr++ =
1667                             cpu_to_le32(pci_dma_lo32
1668                                 (sg_dma_address(prm->sg)));
1669                         if (enable_64bit_addressing) {
1670                                 *dword_ptr++ =
1671                                     cpu_to_le32(pci_dma_hi32
1672                                         (sg_dma_address
1673                                         (prm->sg)));
1674                         }
1675                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1676
1677                         ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1678                             "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1679                             (long long unsigned int)
1680                             pci_dma_hi32(sg_dma_address(prm->sg)),
1681                             (long long unsigned int)
1682                             pci_dma_lo32(sg_dma_address(prm->sg)),
1683                             (int)sg_dma_len(prm->sg));
1684
1685                         prm->sg = sg_next(prm->sg);
1686                 }
1687         }
1688 }
1689
1690 /*
1691  * ha->hardware_lock supposed to be held on entry. We have already made sure
1692  * that there is sufficient amount of request entries to not drop it.
1693  */
1694 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1695         struct scsi_qla_host *vha)
1696 {
1697         int cnt;
1698         uint32_t *dword_ptr;
1699         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1700         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1701
1702         ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1703             "iocb->scsi_status=%x, iocb->flags=%x\n",
1704             le16_to_cpu(pkt24->u.status0.scsi_status),
1705             le16_to_cpu(pkt24->u.status0.flags));
1706
1707         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1708
1709         /* Setup packet address segment pointer */
1710         dword_ptr = pkt24->u.status0.dseg_0_address;
1711
1712         /* Set total data segment count */
1713         if (prm->seg_cnt)
1714                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1715
1716         if (prm->seg_cnt == 0) {
1717                 /* No data transfer */
1718                 *dword_ptr++ = 0;
1719                 *dword_ptr = 0;
1720                 return;
1721         }
1722
1723         /* If scatter gather */
1724         ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1725
1726         /* Load command entry data segments */
1727         for (cnt = 0;
1728             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1729             cnt++, prm->seg_cnt--) {
1730                 *dword_ptr++ =
1731                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1732                 if (enable_64bit_addressing) {
1733                         *dword_ptr++ =
1734                             cpu_to_le32(pci_dma_hi32(
1735                                 sg_dma_address(prm->sg)));
1736                 }
1737                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1738
1739                 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1740                     "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1741                     (long long unsigned int)pci_dma_hi32(sg_dma_address(
1742                     prm->sg)),
1743                     (long long unsigned int)pci_dma_lo32(sg_dma_address(
1744                     prm->sg)),
1745                     (int)sg_dma_len(prm->sg));
1746
1747                 prm->sg = sg_next(prm->sg);
1748         }
1749
1750         qlt_load_cont_data_segments(prm, vha);
1751 }
1752
1753 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1754 {
1755         return cmd->bufflen > 0;
1756 }
1757
1758 /*
1759  * Called without ha->hardware_lock held
1760  */
1761 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1762         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1763         uint32_t *full_req_cnt)
1764 {
1765         struct qla_tgt *tgt = cmd->tgt;
1766         struct scsi_qla_host *vha = tgt->vha;
1767         struct qla_hw_data *ha = vha->hw;
1768         struct se_cmd *se_cmd = &cmd->se_cmd;
1769
1770         if (unlikely(cmd->aborted)) {
1771                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1772                     "qla_target(%d): terminating exchange "
1773                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1774                     se_cmd, cmd->tag);
1775
1776                 cmd->state = QLA_TGT_STATE_ABORTED;
1777
1778                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1779
1780                 /* !! At this point cmd could be already freed !! */
1781                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1782         }
1783
1784         ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1785             vha->vp_idx, cmd->tag);
1786
1787         prm->cmd = cmd;
1788         prm->tgt = tgt;
1789         prm->rq_result = scsi_status;
1790         prm->sense_buffer = &cmd->sense_buffer[0];
1791         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1792         prm->sg = NULL;
1793         prm->seg_cnt = -1;
1794         prm->req_cnt = 1;
1795         prm->add_status_pkt = 0;
1796
1797         ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1798             prm->rq_result, xmit_type);
1799
1800         /* Send marker if required */
1801         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1802                 return -EFAULT;
1803
1804         ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1805
1806         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1807                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1808                         return -EAGAIN;
1809         }
1810
1811         *full_req_cnt = prm->req_cnt;
1812
1813         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1814                 prm->residual = se_cmd->residual_count;
1815                 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1816                     "Residual underflow: %d (tag %d, "
1817                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1818                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1819                     cmd->bufflen, prm->rq_result);
1820                 prm->rq_result |= SS_RESIDUAL_UNDER;
1821         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1822                 prm->residual = se_cmd->residual_count;
1823                 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1824                     "Residual overflow: %d (tag %d, "
1825                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1826                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1827                     cmd->bufflen, prm->rq_result);
1828                 prm->rq_result |= SS_RESIDUAL_OVER;
1829         }
1830
1831         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1832                 /*
1833                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1834                  * ignored in *xmit_response() below
1835                  */
1836                 if (qlt_has_data(cmd)) {
1837                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1838                             (IS_FWI2_CAPABLE(ha) &&
1839                             (prm->rq_result != 0))) {
1840                                 prm->add_status_pkt = 1;
1841                                 (*full_req_cnt)++;
1842                         }
1843                 }
1844         }
1845
1846         ql_dbg(ql_dbg_tgt, vha, 0xe016,
1847             "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1848             prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1849
1850         return 0;
1851 }
1852
1853 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1854         struct qla_tgt_cmd *cmd, int sending_sense)
1855 {
1856         if (ha->tgt.enable_class_2)
1857                 return 0;
1858
1859         if (sending_sense)
1860                 return cmd->conf_compl_supported;
1861         else
1862                 return ha->tgt.enable_explicit_conf &&
1863                     cmd->conf_compl_supported;
1864 }
1865
1866 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1867 /*
1868  *  Original taken from the XFS code
1869  */
1870 static unsigned long qlt_srr_random(void)
1871 {
1872         static int Inited;
1873         static unsigned long RandomValue;
1874         static DEFINE_SPINLOCK(lock);
1875         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1876         register long rv;
1877         register long lo;
1878         register long hi;
1879         unsigned long flags;
1880
1881         spin_lock_irqsave(&lock, flags);
1882         if (!Inited) {
1883                 RandomValue = jiffies;
1884                 Inited = 1;
1885         }
1886         rv = RandomValue;
1887         hi = rv / 127773;
1888         lo = rv % 127773;
1889         rv = 16807 * lo - 2836 * hi;
1890         if (rv <= 0)
1891                 rv += 2147483647;
1892         RandomValue = rv;
1893         spin_unlock_irqrestore(&lock, flags);
1894         return rv;
1895 }
1896
1897 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1898 {
1899 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1900         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1901             == 50) {
1902                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1903                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1904                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1905         }
1906 #endif
1907         /*
1908          * It's currently not possible to simulate SRRs for FCP_WRITE without
1909          * a physical link layer failure, so don't even try here..
1910          */
1911         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1912                 return;
1913
1914         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1915             ((qlt_srr_random() % 100) == 20)) {
1916                 int i, leave = 0;
1917                 unsigned int tot_len = 0;
1918
1919                 while (leave == 0)
1920                         leave = qlt_srr_random() % cmd->sg_cnt;
1921
1922                 for (i = 0; i < leave; i++)
1923                         tot_len += cmd->sg[i].length;
1924
1925                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1926                     "Cutting cmd %p (tag %d) buffer"
1927                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1928                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1929                     cmd->bufflen, cmd->sg_cnt);
1930
1931                 cmd->bufflen = tot_len;
1932                 cmd->sg_cnt = leave;
1933         }
1934
1935         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1936                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1937
1938                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1939                     "Cutting cmd %p (tag %d) buffer head "
1940                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1941                     cmd->bufflen);
1942                 if (offset == 0)
1943                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1944                 else if (qlt_set_data_offset(cmd, offset)) {
1945                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1946                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1947                 }
1948         }
1949 }
1950 #else
1951 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1952 {}
1953 #endif
1954
1955 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1956         struct qla_tgt_prm *prm)
1957 {
1958         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1959             (uint32_t)sizeof(ctio->u.status1.sense_data));
1960         ctio->u.status0.flags |=
1961             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1962         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1963                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1964                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1965                     CTIO7_FLAGS_CONFORM_REQ);
1966         }
1967         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1968         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1969         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1970                 int i;
1971
1972                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1973                         if (prm->cmd->se_cmd.scsi_status != 0) {
1974                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1975                                     "Skipping EXPLICIT_CONFORM and "
1976                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1977                                     "non GOOD status\n");
1978                                 goto skip_explict_conf;
1979                         }
1980                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1981                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1982                             CTIO7_FLAGS_CONFORM_REQ);
1983                 }
1984 skip_explict_conf:
1985                 ctio->u.status1.flags &=
1986                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1987                 ctio->u.status1.flags |=
1988                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1989                 ctio->u.status1.scsi_status |=
1990                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1991                 ctio->u.status1.sense_length =
1992                     cpu_to_le16(prm->sense_buffer_len);
1993                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1994                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1995                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1996 #if 0
1997                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1998                         static int q;
1999                         if (q < 10) {
2000                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
2001                                     "qla_target(%d): %d bytes of sense "
2002                                     "lost", prm->tgt->ha->vp_idx,
2003                                     prm->sense_buffer_len % 4);
2004                                 q++;
2005                         }
2006                 }
2007 #endif
2008         } else {
2009                 ctio->u.status1.flags &=
2010                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
2011                 ctio->u.status1.flags |=
2012                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
2013                 ctio->u.status1.sense_length = 0;
2014                 memset(ctio->u.status1.sense_data, 0,
2015                     sizeof(ctio->u.status1.sense_data));
2016         }
2017
2018         /* Sense with len > 24, is it possible ??? */
2019 }
2020
2021 /*
2022  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
2023  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
2024  */
2025 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
2026         uint8_t scsi_status)
2027 {
2028         struct scsi_qla_host *vha = cmd->vha;
2029         struct qla_hw_data *ha = vha->hw;
2030         struct ctio7_to_24xx *pkt;
2031         struct qla_tgt_prm prm;
2032         uint32_t full_req_cnt = 0;
2033         unsigned long flags = 0;
2034         int res;
2035
2036         memset(&prm, 0, sizeof(prm));
2037         qlt_check_srr_debug(cmd, &xmit_type);
2038
2039         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
2040             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
2041             "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
2042             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
2043
2044         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
2045             &full_req_cnt);
2046         if (unlikely(res != 0)) {
2047                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
2048                         return 0;
2049
2050                 return res;
2051         }
2052
2053         spin_lock_irqsave(&ha->hardware_lock, flags);
2054
2055         /* Does F/W have an IOCBs for this request */
2056         res = qlt_check_reserve_free_req(vha, full_req_cnt);
2057         if (unlikely(res))
2058                 goto out_unmap_unlock;
2059
2060         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2061         if (unlikely(res != 0))
2062                 goto out_unmap_unlock;
2063
2064
2065         pkt = (struct ctio7_to_24xx *)prm.pkt;
2066
2067         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
2068                 pkt->u.status0.flags |=
2069                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
2070                         CTIO7_FLAGS_STATUS_MODE_0);
2071
2072                 qlt_load_data_segments(&prm, vha);
2073
2074                 if (prm.add_status_pkt == 0) {
2075                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
2076                                 pkt->u.status0.scsi_status =
2077                                     cpu_to_le16(prm.rq_result);
2078                                 pkt->u.status0.residual =
2079                                     cpu_to_le32(prm.residual);
2080                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
2081                                     CTIO7_FLAGS_SEND_STATUS);
2082                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
2083                                         pkt->u.status0.flags |=
2084                                             __constant_cpu_to_le16(
2085                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
2086                                                 CTIO7_FLAGS_CONFORM_REQ);
2087                                 }
2088                         }
2089
2090                 } else {
2091                         /*
2092                          * We have already made sure that there is sufficient
2093                          * amount of request entries to not drop HW lock in
2094                          * req_pkt().
2095                          */
2096                         struct ctio7_to_24xx *ctio =
2097                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
2098
2099                         ql_dbg(ql_dbg_tgt, vha, 0xe019,
2100                             "Building additional status packet\n");
2101
2102                         memcpy(ctio, pkt, sizeof(*ctio));
2103                         ctio->entry_count = 1;
2104                         ctio->dseg_count = 0;
2105                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
2106                             CTIO7_FLAGS_DATA_IN);
2107
2108                         /* Real finish is ctio_m1's finish */
2109                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
2110                         pkt->u.status0.flags |= __constant_cpu_to_le16(
2111                             CTIO7_FLAGS_DONT_RET_CTIO);
2112                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
2113                             &prm);
2114                         pr_debug("Status CTIO7: %p\n", ctio);
2115                 }
2116         } else
2117                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
2118
2119
2120         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
2121
2122         ql_dbg(ql_dbg_tgt, vha, 0xe01a,
2123             "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
2124             pkt, scsi_status);
2125
2126         qla2x00_start_iocbs(vha, vha->req);
2127         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2128
2129         return 0;
2130
2131 out_unmap_unlock:
2132         if (cmd->sg_mapped)
2133                 qlt_unmap_sg(vha, cmd);
2134         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2135
2136         return res;
2137 }
2138 EXPORT_SYMBOL(qlt_xmit_response);
2139
2140 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2141 {
2142         struct ctio7_to_24xx *pkt;
2143         struct scsi_qla_host *vha = cmd->vha;
2144         struct qla_hw_data *ha = vha->hw;
2145         struct qla_tgt *tgt = cmd->tgt;
2146         struct qla_tgt_prm prm;
2147         unsigned long flags;
2148         int res = 0;
2149
2150         memset(&prm, 0, sizeof(prm));
2151         prm.cmd = cmd;
2152         prm.tgt = tgt;
2153         prm.sg = NULL;
2154         prm.req_cnt = 1;
2155
2156         /* Send marker if required */
2157         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2158                 return -EIO;
2159
2160         ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2161             (int)vha->vp_idx);
2162
2163         /* Calculate number of entries and segments required */
2164         if (qlt_pci_map_calc_cnt(&prm) != 0)
2165                 return -EAGAIN;
2166
2167         spin_lock_irqsave(&ha->hardware_lock, flags);
2168
2169         /* Does F/W have an IOCBs for this request */
2170         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2171         if (res != 0)
2172                 goto out_unlock_free_unmap;
2173
2174         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2175         if (unlikely(res != 0))
2176                 goto out_unlock_free_unmap;
2177         pkt = (struct ctio7_to_24xx *)prm.pkt;
2178         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2179             CTIO7_FLAGS_STATUS_MODE_0);
2180         qlt_load_data_segments(&prm, vha);
2181
2182         cmd->state = QLA_TGT_STATE_NEED_DATA;
2183
2184         qla2x00_start_iocbs(vha, vha->req);
2185         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2186
2187         return res;
2188
2189 out_unlock_free_unmap:
2190         if (cmd->sg_mapped)
2191                 qlt_unmap_sg(vha, cmd);
2192         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2193
2194         return res;
2195 }
2196 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2197
2198 /* If hardware_lock held on entry, might drop it, then reaquire */
2199 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2200 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2201         struct qla_tgt_cmd *cmd,
2202         struct atio_from_isp *atio)
2203 {
2204         struct ctio7_to_24xx *ctio24;
2205         struct qla_hw_data *ha = vha->hw;
2206         request_t *pkt;
2207         int ret = 0;
2208
2209         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2210
2211         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2212         if (pkt == NULL) {
2213                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2214                     "qla_target(%d): %s failed: unable to allocate "
2215                     "request packet\n", vha->vp_idx, __func__);
2216                 return -ENOMEM;
2217         }
2218
2219         if (cmd != NULL) {
2220                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2221                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2222                             "qla_target(%d): Terminating cmd %p with "
2223                             "incorrect state %d\n", vha->vp_idx, cmd,
2224                             cmd->state);
2225                 } else
2226                         ret = 1;
2227         }
2228
2229         pkt->entry_count = 1;
2230         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2231
2232         ctio24 = (struct ctio7_to_24xx *)pkt;
2233         ctio24->entry_type = CTIO_TYPE7;
2234         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2235         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2236         ctio24->vp_index = vha->vp_idx;
2237         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2238         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2239         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2240         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2241         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2242             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2243                 CTIO7_FLAGS_TERMINATE);
2244         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2245
2246         /* Most likely, it isn't needed */
2247         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2248             &atio->u.isp24.fcp_cmnd.add_cdb[
2249             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2250         if (ctio24->u.status1.residual != 0)
2251                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2252
2253         qla2x00_start_iocbs(vha, vha->req);
2254         return ret;
2255 }
2256
2257 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2258         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2259 {
2260         unsigned long flags;
2261         int rc;
2262
2263         if (qlt_issue_marker(vha, ha_locked) < 0)
2264                 return;
2265
2266         if (ha_locked) {
2267                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2268                 goto done;
2269         }
2270         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2271         rc = __qlt_send_term_exchange(vha, cmd, atio);
2272         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2273 done:
2274         if (rc == 1) {
2275                 if (!ha_locked && !in_interrupt())
2276                         msleep(250); /* just in case */
2277
2278                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2279         }
2280 }
2281
2282 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2283 {
2284         BUG_ON(cmd->sg_mapped);
2285
2286         if (unlikely(cmd->free_sg))
2287                 kfree(cmd->sg);
2288         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2289 }
2290 EXPORT_SYMBOL(qlt_free_cmd);
2291
2292 /* ha->hardware_lock supposed to be held on entry */
2293 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2294         struct qla_tgt_cmd *cmd, void *ctio)
2295 {
2296         struct qla_tgt_srr_ctio *sc;
2297         struct qla_hw_data *ha = vha->hw;
2298         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2299         struct qla_tgt_srr_imm *imm;
2300
2301         tgt->ctio_srr_id++;
2302
2303         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2304             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2305
2306         if (!ctio) {
2307                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2308                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2309                     vha->vp_idx);
2310                 return -EINVAL;
2311         }
2312
2313         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2314         if (sc != NULL) {
2315                 sc->cmd = cmd;
2316                 /* IRQ is already OFF */
2317                 spin_lock(&tgt->srr_lock);
2318                 sc->srr_id = tgt->ctio_srr_id;
2319                 list_add_tail(&sc->srr_list_entry,
2320                     &tgt->srr_ctio_list);
2321                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2322                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2323                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2324                         int found = 0;
2325                         list_for_each_entry(imm, &tgt->srr_imm_list,
2326                             srr_list_entry) {
2327                                 if (imm->srr_id == sc->srr_id) {
2328                                         found = 1;
2329                                         break;
2330                                 }
2331                         }
2332                         if (found) {
2333                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2334                                     "Scheduling srr work\n");
2335                                 schedule_work(&tgt->srr_work);
2336                         } else {
2337                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2338                                     "qla_target(%d): imm_srr_id "
2339                                     "== ctio_srr_id (%d), but there is no "
2340                                     "corresponding SRR IMM, deleting CTIO "
2341                                     "SRR %p\n", vha->vp_idx,
2342                                     tgt->ctio_srr_id, sc);
2343                                 list_del(&sc->srr_list_entry);
2344                                 spin_unlock(&tgt->srr_lock);
2345
2346                                 kfree(sc);
2347                                 return -EINVAL;
2348                         }
2349                 }
2350                 spin_unlock(&tgt->srr_lock);
2351         } else {
2352                 struct qla_tgt_srr_imm *ti;
2353
2354                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2355                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2356                     vha->vp_idx);
2357                 spin_lock(&tgt->srr_lock);
2358                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2359                     srr_list_entry) {
2360                         if (imm->srr_id == tgt->ctio_srr_id) {
2361                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2362                                     "IMM SRR %p deleted (id %d)\n",
2363                                     imm, imm->srr_id);
2364                                 list_del(&imm->srr_list_entry);
2365                                 qlt_reject_free_srr_imm(vha, imm, 1);
2366                         }
2367                 }
2368                 spin_unlock(&tgt->srr_lock);
2369
2370                 return -ENOMEM;
2371         }
2372
2373         return 0;
2374 }
2375
2376 /*
2377  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2378  */
2379 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2380         struct qla_tgt_cmd *cmd, uint32_t status)
2381 {
2382         int term = 0;
2383
2384         if (ctio != NULL) {
2385                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2386                 term = !(c->flags &
2387                     __constant_cpu_to_le16(OF_TERM_EXCH));
2388         } else
2389                 term = 1;
2390
2391         if (term)
2392                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2393
2394         return term;
2395 }
2396
2397 /* ha->hardware_lock supposed to be held on entry */
2398 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2399         uint32_t handle)
2400 {
2401         struct qla_hw_data *ha = vha->hw;
2402
2403         handle--;
2404         if (ha->tgt.cmds[handle] != NULL) {
2405                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2406                 ha->tgt.cmds[handle] = NULL;
2407                 return cmd;
2408         } else
2409                 return NULL;
2410 }
2411
2412 /* ha->hardware_lock supposed to be held on entry */
2413 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2414         uint32_t handle, void *ctio)
2415 {
2416         struct qla_tgt_cmd *cmd = NULL;
2417
2418         /* Clear out internal marks */
2419         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2420             CTIO_INTERMEDIATE_HANDLE_MARK);
2421
2422         if (handle != QLA_TGT_NULL_HANDLE) {
2423                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2424                         ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2425                             "SKIP_HANDLE CTIO\n");
2426                         return NULL;
2427                 }
2428                 /* handle-1 is actually used */
2429                 if (unlikely(handle > MAX_OUTSTANDING_COMMANDS)) {
2430                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2431                             "qla_target(%d): Wrong handle %x received\n",
2432                             vha->vp_idx, handle);
2433                         return NULL;
2434                 }
2435                 cmd = qlt_get_cmd(vha, handle);
2436                 if (unlikely(cmd == NULL)) {
2437                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2438                             "qla_target(%d): Suspicious: unable to "
2439                             "find the command with handle %x\n", vha->vp_idx,
2440                             handle);
2441                         return NULL;
2442                 }
2443         } else if (ctio != NULL) {
2444                 /* We can't get loop ID from CTIO7 */
2445                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2446                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2447                     "support NULL handles\n", vha->vp_idx);
2448                 return NULL;
2449         }
2450
2451         return cmd;
2452 }
2453
2454 /*
2455  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2456  */
2457 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2458         uint32_t status, void *ctio)
2459 {
2460         struct qla_hw_data *ha = vha->hw;
2461         struct se_cmd *se_cmd;
2462         struct target_core_fabric_ops *tfo;
2463         struct qla_tgt_cmd *cmd;
2464
2465         ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2466             "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2467             vha->vp_idx, ctio, status, handle);
2468
2469         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2470                 /* That could happen only in case of an error/reset/abort */
2471                 if (status != CTIO_SUCCESS) {
2472                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2473                             "Intermediate CTIO received"
2474                             " (status %x)\n", status);
2475                 }
2476                 return;
2477         }
2478
2479         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2480         if (cmd == NULL) {
2481                 if (status != CTIO_SUCCESS)
2482                         qlt_term_ctio_exchange(vha, ctio, NULL, status);
2483                 return;
2484         }
2485         se_cmd = &cmd->se_cmd;
2486         tfo = se_cmd->se_tfo;
2487
2488         if (cmd->sg_mapped)
2489                 qlt_unmap_sg(vha, cmd);
2490
2491         if (unlikely(status != CTIO_SUCCESS)) {
2492                 switch (status & 0xFFFF) {
2493                 case CTIO_LIP_RESET:
2494                 case CTIO_TARGET_RESET:
2495                 case CTIO_ABORTED:
2496                 case CTIO_TIMEOUT:
2497                 case CTIO_INVALID_RX_ID:
2498                         /* They are OK */
2499                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2500                             "qla_target(%d): CTIO with "
2501                             "status %#x received, state %x, se_cmd %p, "
2502                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2503                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2504                             status, cmd->state, se_cmd);
2505                         break;
2506
2507                 case CTIO_PORT_LOGGED_OUT:
2508                 case CTIO_PORT_UNAVAILABLE:
2509                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2510                             "qla_target(%d): CTIO with PORT LOGGED "
2511                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
2512                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
2513                             status, cmd->state, se_cmd);
2514                         break;
2515
2516                 case CTIO_SRR_RECEIVED:
2517                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2518                             "qla_target(%d): CTIO with SRR_RECEIVED"
2519                             " status %x received (state %x, se_cmd %p)\n",
2520                             vha->vp_idx, status, cmd->state, se_cmd);
2521                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2522                                 break;
2523                         else
2524                                 return;
2525
2526                 default:
2527                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2528                             "qla_target(%d): CTIO with error status "
2529                             "0x%x received (state %x, se_cmd %p\n",
2530                             vha->vp_idx, status, cmd->state, se_cmd);
2531                         break;
2532                 }
2533
2534                 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2535                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2536                                 return;
2537         }
2538
2539         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2540                 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2541         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2542                 int rx_status = 0;
2543
2544                 cmd->state = QLA_TGT_STATE_DATA_IN;
2545
2546                 if (unlikely(status != CTIO_SUCCESS))
2547                         rx_status = -EIO;
2548                 else
2549                         cmd->write_data_transferred = 1;
2550
2551                 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2552                     "Data received, context %x, rx_status %d\n",
2553                     0x0, rx_status);
2554
2555                 ha->tgt.tgt_ops->handle_data(cmd);
2556                 return;
2557         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2558                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2559                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2560         } else {
2561                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2562                     "qla_target(%d): A command in state (%d) should "
2563                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2564         }
2565
2566         if (unlikely(status != CTIO_SUCCESS)) {
2567                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2568                 dump_stack();
2569         }
2570
2571         ha->tgt.tgt_ops->free_cmd(cmd);
2572 }
2573
2574 /* ha->hardware_lock supposed to be held on entry */
2575 /* called via callback from qla2xxx */
2576 void qlt_ctio_completion(struct scsi_qla_host *vha, uint32_t handle)
2577 {
2578         struct qla_hw_data *ha = vha->hw;
2579         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2580
2581         if (likely(tgt == NULL)) {
2582                 ql_dbg(ql_dbg_tgt, vha, 0xe021,
2583                     "CTIO, but target mode not enabled"
2584                     " (ha %d %p handle %#x)", vha->vp_idx, ha, handle);
2585                 return;
2586         }
2587
2588         tgt->irq_cmd_count++;
2589         qlt_do_ctio_completion(vha, handle, CTIO_SUCCESS, NULL);
2590         tgt->irq_cmd_count--;
2591 }
2592
2593 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2594         uint8_t task_codes)
2595 {
2596         int fcp_task_attr;
2597
2598         switch (task_codes) {
2599         case ATIO_SIMPLE_QUEUE:
2600                 fcp_task_attr = MSG_SIMPLE_TAG;
2601                 break;
2602         case ATIO_HEAD_OF_QUEUE:
2603                 fcp_task_attr = MSG_HEAD_TAG;
2604                 break;
2605         case ATIO_ORDERED_QUEUE:
2606                 fcp_task_attr = MSG_ORDERED_TAG;
2607                 break;
2608         case ATIO_ACA_QUEUE:
2609                 fcp_task_attr = MSG_ACA_TAG;
2610                 break;
2611         case ATIO_UNTAGGED:
2612                 fcp_task_attr = MSG_SIMPLE_TAG;
2613                 break;
2614         default:
2615                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2616                     "qla_target: unknown task code %x, use ORDERED instead\n",
2617                     task_codes);
2618                 fcp_task_attr = MSG_ORDERED_TAG;
2619                 break;
2620         }
2621
2622         return fcp_task_attr;
2623 }
2624
2625 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2626                                         uint8_t *);
2627 /*
2628  * Process context for I/O path into tcm_qla2xxx code
2629  */
2630 static void qlt_do_work(struct work_struct *work)
2631 {
2632         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2633         scsi_qla_host_t *vha = cmd->vha;
2634         struct qla_hw_data *ha = vha->hw;
2635         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2636         struct qla_tgt_sess *sess = NULL;
2637         struct atio_from_isp *atio = &cmd->atio;
2638         unsigned char *cdb;
2639         unsigned long flags;
2640         uint32_t data_length;
2641         int ret, fcp_task_attr, data_dir, bidi = 0;
2642
2643         if (tgt->tgt_stop)
2644                 goto out_term;
2645
2646         spin_lock_irqsave(&ha->hardware_lock, flags);
2647         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2648             atio->u.isp24.fcp_hdr.s_id);
2649         if (sess) {
2650                 if (unlikely(sess->tearing_down)) {
2651                         sess = NULL;
2652                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2653                         goto out_term;
2654                 } else {
2655                         /*
2656                          * Do the extra kref_get() before dropping
2657                          * qla_hw_data->hardware_lock.
2658                          */
2659                         kref_get(&sess->se_sess->sess_kref);
2660                 }
2661         }
2662         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2663
2664         if (unlikely(!sess)) {
2665                 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2666
2667                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2668                         "qla_target(%d): Unable to find wwn login"
2669                         " (s_id %x:%x:%x), trying to create it manually\n",
2670                         vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2671
2672                 if (atio->u.raw.entry_count > 1) {
2673                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2674                                 "Dropping multy entry cmd %p\n", cmd);
2675                         goto out_term;
2676                 }
2677
2678                 mutex_lock(&ha->tgt.tgt_mutex);
2679                 sess = qlt_make_local_sess(vha, s_id);
2680                 /* sess has an extra creation ref. */
2681                 mutex_unlock(&ha->tgt.tgt_mutex);
2682
2683                 if (!sess)
2684                         goto out_term;
2685         }
2686
2687         cmd->sess = sess;
2688         cmd->loop_id = sess->loop_id;
2689         cmd->conf_compl_supported = sess->conf_compl_supported;
2690
2691         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2692         cmd->tag = atio->u.isp24.exchange_addr;
2693         cmd->unpacked_lun = scsilun_to_int(
2694             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2695
2696         if (atio->u.isp24.fcp_cmnd.rddata &&
2697             atio->u.isp24.fcp_cmnd.wrdata) {
2698                 bidi = 1;
2699                 data_dir = DMA_TO_DEVICE;
2700         } else if (atio->u.isp24.fcp_cmnd.rddata)
2701                 data_dir = DMA_FROM_DEVICE;
2702         else if (atio->u.isp24.fcp_cmnd.wrdata)
2703                 data_dir = DMA_TO_DEVICE;
2704         else
2705                 data_dir = DMA_NONE;
2706
2707         fcp_task_attr = qlt_get_fcp_task_attr(vha,
2708             atio->u.isp24.fcp_cmnd.task_attr);
2709         data_length = be32_to_cpu(get_unaligned((uint32_t *)
2710             &atio->u.isp24.fcp_cmnd.add_cdb[
2711             atio->u.isp24.fcp_cmnd.add_cdb_len]));
2712
2713         ql_dbg(ql_dbg_tgt, vha, 0xe022,
2714             "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2715             cmd, cmd->unpacked_lun, cmd->tag);
2716
2717         ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2718             fcp_task_attr, data_dir, bidi);
2719         if (ret != 0)
2720                 goto out_term;
2721         /*
2722          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2723          */
2724         ha->tgt.tgt_ops->put_sess(sess);
2725         return;
2726
2727 out_term:
2728         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2729         /*
2730          * cmd has not sent to target yet, so pass NULL as the second argument
2731          */
2732         spin_lock_irqsave(&ha->hardware_lock, flags);
2733         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
2734         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2735         if (sess)
2736                 ha->tgt.tgt_ops->put_sess(sess);
2737 }
2738
2739 /* ha->hardware_lock supposed to be held on entry */
2740 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2741         struct atio_from_isp *atio)
2742 {
2743         struct qla_hw_data *ha = vha->hw;
2744         struct qla_tgt *tgt = ha->tgt.qla_tgt;
2745         struct qla_tgt_cmd *cmd;
2746
2747         if (unlikely(tgt->tgt_stop)) {
2748                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2749                     "New command while device %p is shutting down\n", tgt);
2750                 return -EFAULT;
2751         }
2752
2753         cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2754         if (!cmd) {
2755                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2756                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2757                 return -ENOMEM;
2758         }
2759
2760         INIT_LIST_HEAD(&cmd->cmd_list);
2761
2762         memcpy(&cmd->atio, atio, sizeof(*atio));
2763         cmd->state = QLA_TGT_STATE_NEW;
2764         cmd->tgt = ha->tgt.qla_tgt;
2765         cmd->vha = vha;
2766
2767         INIT_WORK(&cmd->work, qlt_do_work);
2768         queue_work(qla_tgt_wq, &cmd->work);
2769         return 0;
2770
2771 }
2772
2773 /* ha->hardware_lock supposed to be held on entry */
2774 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2775         int fn, void *iocb, int flags)
2776 {
2777         struct scsi_qla_host *vha = sess->vha;
2778         struct qla_hw_data *ha = vha->hw;
2779         struct qla_tgt_mgmt_cmd *mcmd;
2780         int res;
2781         uint8_t tmr_func;
2782
2783         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2784         if (!mcmd) {
2785                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2786                     "qla_target(%d): Allocation of management "
2787                     "command failed, some commands and their data could "
2788                     "leak\n", vha->vp_idx);
2789                 return -ENOMEM;
2790         }
2791         memset(mcmd, 0, sizeof(*mcmd));
2792         mcmd->sess = sess;
2793
2794         if (iocb) {
2795                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2796                     sizeof(mcmd->orig_iocb.imm_ntfy));
2797         }
2798         mcmd->tmr_func = fn;
2799         mcmd->flags = flags;
2800
2801         switch (fn) {
2802         case QLA_TGT_CLEAR_ACA:
2803                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2804                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2805                 tmr_func = TMR_CLEAR_ACA;
2806                 break;
2807
2808         case QLA_TGT_TARGET_RESET:
2809                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2810                     "qla_target(%d): TARGET_RESET received\n",
2811                     sess->vha->vp_idx);
2812                 tmr_func = TMR_TARGET_WARM_RESET;
2813                 break;
2814
2815         case QLA_TGT_LUN_RESET:
2816                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2817                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2818                 tmr_func = TMR_LUN_RESET;
2819                 break;
2820
2821         case QLA_TGT_CLEAR_TS:
2822                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2823                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2824                 tmr_func = TMR_CLEAR_TASK_SET;
2825                 break;
2826
2827         case QLA_TGT_ABORT_TS:
2828                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2829                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2830                 tmr_func = TMR_ABORT_TASK_SET;
2831                 break;
2832 #if 0
2833         case QLA_TGT_ABORT_ALL:
2834                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2835                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2836                     sess->vha->vp_idx);
2837                 tmr_func = 0;
2838                 break;
2839
2840         case QLA_TGT_ABORT_ALL_SESS:
2841                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2842                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2843                     sess->vha->vp_idx);
2844                 tmr_func = 0;
2845                 break;
2846
2847         case QLA_TGT_NEXUS_LOSS_SESS:
2848                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2849                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2850                     sess->vha->vp_idx);
2851                 tmr_func = 0;
2852                 break;
2853
2854         case QLA_TGT_NEXUS_LOSS:
2855                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2856                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2857                 tmr_func = 0;
2858                 break;
2859 #endif
2860         default:
2861                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2862                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2863                     sess->vha->vp_idx, fn);
2864                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2865                 return -ENOSYS;
2866         }
2867
2868         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2869         if (res != 0) {
2870                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2871                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2872                     sess->vha->vp_idx, res);
2873                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2874                 return -EFAULT;
2875         }
2876
2877         return 0;
2878 }
2879
2880 /* ha->hardware_lock supposed to be held on entry */
2881 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2882 {
2883         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2884         struct qla_hw_data *ha = vha->hw;
2885         struct qla_tgt *tgt;
2886         struct qla_tgt_sess *sess;
2887         uint32_t lun, unpacked_lun;
2888         int lun_size, fn;
2889
2890         tgt = ha->tgt.qla_tgt;
2891
2892         lun = a->u.isp24.fcp_cmnd.lun;
2893         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2894         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2895         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2896             a->u.isp24.fcp_hdr.s_id);
2897         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2898
2899         if (!sess) {
2900                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2901                     "qla_target(%d): task mgmt fn 0x%x for "
2902                     "non-existant session\n", vha->vp_idx, fn);
2903                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2904                     sizeof(struct atio_from_isp));
2905         }
2906
2907         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2908 }
2909
2910 /* ha->hardware_lock supposed to be held on entry */
2911 static int __qlt_abort_task(struct scsi_qla_host *vha,
2912         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2913 {
2914         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2915         struct qla_hw_data *ha = vha->hw;
2916         struct qla_tgt_mgmt_cmd *mcmd;
2917         uint32_t lun, unpacked_lun;
2918         int rc;
2919
2920         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2921         if (mcmd == NULL) {
2922                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2923                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2924                     vha->vp_idx, __func__);
2925                 return -ENOMEM;
2926         }
2927         memset(mcmd, 0, sizeof(*mcmd));
2928
2929         mcmd->sess = sess;
2930         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2931             sizeof(mcmd->orig_iocb.imm_ntfy));
2932
2933         lun = a->u.isp24.fcp_cmnd.lun;
2934         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2935
2936         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2937             le16_to_cpu(iocb->u.isp2x.seq_id));
2938         if (rc != 0) {
2939                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2940                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2941                     vha->vp_idx, rc);
2942                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2943                 return -EFAULT;
2944         }
2945
2946         return 0;
2947 }
2948
2949 /* ha->hardware_lock supposed to be held on entry */
2950 static int qlt_abort_task(struct scsi_qla_host *vha,
2951         struct imm_ntfy_from_isp *iocb)
2952 {
2953         struct qla_hw_data *ha = vha->hw;
2954         struct qla_tgt_sess *sess;
2955         int loop_id;
2956
2957         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2958
2959         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2960         if (sess == NULL) {
2961                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2962                     "qla_target(%d): task abort for unexisting "
2963                     "session\n", vha->vp_idx);
2964                 return qlt_sched_sess_work(ha->tgt.qla_tgt,
2965                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2966         }
2967
2968         return __qlt_abort_task(vha, iocb, sess);
2969 }
2970
2971 /*
2972  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2973  */
2974 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2975         struct imm_ntfy_from_isp *iocb)
2976 {
2977         struct qla_hw_data *ha = vha->hw;
2978         int res = 0;
2979
2980         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2981             "qla_target(%d): Port ID: 0x%02x:%02x:%02x"
2982             " ELS opcode: 0x%02x\n", vha->vp_idx, iocb->u.isp24.port_id[0],
2983             iocb->u.isp24.port_id[1], iocb->u.isp24.port_id[2],
2984             iocb->u.isp24.status_subcode);
2985
2986         switch (iocb->u.isp24.status_subcode) {
2987         case ELS_PLOGI:
2988         case ELS_FLOGI:
2989         case ELS_PRLI:
2990         case ELS_LOGO:
2991         case ELS_PRLO:
2992                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2993                 break;
2994         case ELS_PDISC:
2995         case ELS_ADISC:
2996         {
2997                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
2998                 if (tgt->link_reinit_iocb_pending) {
2999                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3000                             0, 0, 0, 0, 0, 0);
3001                         tgt->link_reinit_iocb_pending = 0;
3002                 }
3003                 res = 1; /* send notify ack */
3004                 break;
3005         }
3006
3007         default:
3008                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
3009                     "qla_target(%d): Unsupported ELS command %x "
3010                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
3011                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
3012                 break;
3013         }
3014
3015         return res;
3016 }
3017
3018 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
3019 {
3020         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
3021         size_t first_offset = 0, rem_offset = offset, tmp = 0;
3022         int i, sg_srr_cnt, bufflen = 0;
3023
3024         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
3025             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
3026             "cmd->sg_cnt: %u, direction: %d\n",
3027             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
3028
3029         /*
3030          * FIXME: Reject non zero SRR relative offset until we can test
3031          * this code properly.
3032          */
3033         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
3034         return -1;
3035
3036         if (!cmd->sg || !cmd->sg_cnt) {
3037                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
3038                     "Missing cmd->sg or zero cmd->sg_cnt in"
3039                     " qla_tgt_set_data_offset\n");
3040                 return -EINVAL;
3041         }
3042         /*
3043          * Walk the current cmd->sg list until we locate the new sg_srr_start
3044          */
3045         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
3046                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
3047                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
3048                     i, sg, sg_page(sg), sg->length, sg->offset);
3049
3050                 if ((sg->length + tmp) > offset) {
3051                         first_offset = rem_offset;
3052                         sg_srr_start = sg;
3053                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
3054                             "Found matching sg[%d], using %p as sg_srr_start, "
3055                             "and using first_offset: %zu\n", i, sg,
3056                             first_offset);
3057                         break;
3058                 }
3059                 tmp += sg->length;
3060                 rem_offset -= sg->length;
3061         }
3062
3063         if (!sg_srr_start) {
3064                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
3065                     "Unable to locate sg_srr_start for offset: %u\n", offset);
3066                 return -EINVAL;
3067         }
3068         sg_srr_cnt = (cmd->sg_cnt - i);
3069
3070         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
3071         if (!sg_srr) {
3072                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
3073                     "Unable to allocate sgp\n");
3074                 return -ENOMEM;
3075         }
3076         sg_init_table(sg_srr, sg_srr_cnt);
3077         sgp = &sg_srr[0];
3078         /*
3079          * Walk the remaining list for sg_srr_start, mapping to the newly
3080          * allocated sg_srr taking first_offset into account.
3081          */
3082         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
3083                 if (first_offset) {
3084                         sg_set_page(sgp, sg_page(sg),
3085                             (sg->length - first_offset), first_offset);
3086                         first_offset = 0;
3087                 } else {
3088                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
3089                 }
3090                 bufflen += sgp->length;
3091
3092                 sgp = sg_next(sgp);
3093                 if (!sgp)
3094                         break;
3095         }
3096
3097         cmd->sg = sg_srr;
3098         cmd->sg_cnt = sg_srr_cnt;
3099         cmd->bufflen = bufflen;
3100         cmd->offset += offset;
3101         cmd->free_sg = 1;
3102
3103         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
3104         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
3105             cmd->sg_cnt);
3106         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
3107             cmd->bufflen);
3108         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
3109             cmd->offset);
3110
3111         if (cmd->sg_cnt < 0)
3112                 BUG();
3113
3114         if (cmd->bufflen < 0)
3115                 BUG();
3116
3117         return 0;
3118 }
3119
3120 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
3121         uint32_t srr_rel_offs, int *xmit_type)
3122 {
3123         int res = 0, rel_offs;
3124
3125         rel_offs = srr_rel_offs - cmd->offset;
3126         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
3127             srr_rel_offs, rel_offs);
3128
3129         *xmit_type = QLA_TGT_XMIT_ALL;
3130
3131         if (rel_offs < 0) {
3132                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
3133                     "qla_target(%d): SRR rel_offs (%d) < 0",
3134                     cmd->vha->vp_idx, rel_offs);
3135                 res = -1;
3136         } else if (rel_offs == cmd->bufflen)
3137                 *xmit_type = QLA_TGT_XMIT_STATUS;
3138         else if (rel_offs > 0)
3139                 res = qlt_set_data_offset(cmd, rel_offs);
3140
3141         return res;
3142 }
3143
3144 /* No locks, thread context */
3145 static void qlt_handle_srr(struct scsi_qla_host *vha,
3146         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
3147 {
3148         struct imm_ntfy_from_isp *ntfy =
3149             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
3150         struct qla_hw_data *ha = vha->hw;
3151         struct qla_tgt_cmd *cmd = sctio->cmd;
3152         struct se_cmd *se_cmd = &cmd->se_cmd;
3153         unsigned long flags;
3154         int xmit_type = 0, resp = 0;
3155         uint32_t offset;
3156         uint16_t srr_ui;
3157
3158         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
3159         srr_ui = ntfy->u.isp24.srr_ui;
3160
3161         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
3162             cmd, srr_ui);
3163
3164         switch (srr_ui) {
3165         case SRR_IU_STATUS:
3166                 spin_lock_irqsave(&ha->hardware_lock, flags);
3167                 qlt_send_notify_ack(vha, ntfy,
3168                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3169                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3170                 xmit_type = QLA_TGT_XMIT_STATUS;
3171                 resp = 1;
3172                 break;
3173         case SRR_IU_DATA_IN:
3174                 if (!cmd->sg || !cmd->sg_cnt) {
3175                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3176                             "Unable to process SRR_IU_DATA_IN due to"
3177                             " missing cmd->sg, state: %d\n", cmd->state);
3178                         dump_stack();
3179                         goto out_reject;
3180                 }
3181                 if (se_cmd->scsi_status != 0) {
3182                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3183                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3184                             "scsi_status\n");
3185                         goto out_reject;
3186                 }
3187                 cmd->bufflen = se_cmd->data_length;
3188
3189                 if (qlt_has_data(cmd)) {
3190                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3191                                 goto out_reject;
3192                         spin_lock_irqsave(&ha->hardware_lock, flags);
3193                         qlt_send_notify_ack(vha, ntfy,
3194                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3195                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3196                         resp = 1;
3197                 } else {
3198                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3199                             "qla_target(%d): SRR for in data for cmd "
3200                             "without them (tag %d, SCSI status %d), "
3201                             "reject", vha->vp_idx, cmd->tag,
3202                             cmd->se_cmd.scsi_status);
3203                         goto out_reject;
3204                 }
3205                 break;
3206         case SRR_IU_DATA_OUT:
3207                 if (!cmd->sg || !cmd->sg_cnt) {
3208                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3209                             "Unable to process SRR_IU_DATA_OUT due to"
3210                             " missing cmd->sg\n");
3211                         dump_stack();
3212                         goto out_reject;
3213                 }
3214                 if (se_cmd->scsi_status != 0) {
3215                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3216                             "Rejecting SRR_IU_DATA_OUT"
3217                             " with non GOOD scsi_status\n");
3218                         goto out_reject;
3219                 }
3220                 cmd->bufflen = se_cmd->data_length;
3221
3222                 if (qlt_has_data(cmd)) {
3223                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3224                                 goto out_reject;
3225                         spin_lock_irqsave(&ha->hardware_lock, flags);
3226                         qlt_send_notify_ack(vha, ntfy,
3227                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3228                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3229                         if (xmit_type & QLA_TGT_XMIT_DATA)
3230                                 qlt_rdy_to_xfer(cmd);
3231                 } else {
3232                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3233                             "qla_target(%d): SRR for out data for cmd "
3234                             "without them (tag %d, SCSI status %d), "
3235                             "reject", vha->vp_idx, cmd->tag,
3236                             cmd->se_cmd.scsi_status);
3237                         goto out_reject;
3238                 }
3239                 break;
3240         default:
3241                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3242                     "qla_target(%d): Unknown srr_ui value %x",
3243                     vha->vp_idx, srr_ui);
3244                 goto out_reject;
3245         }
3246
3247         /* Transmit response in case of status and data-in cases */
3248         if (resp)
3249                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3250
3251         return;
3252
3253 out_reject:
3254         spin_lock_irqsave(&ha->hardware_lock, flags);
3255         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3256             NOTIFY_ACK_SRR_FLAGS_REJECT,
3257             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3258             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3259         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3260                 cmd->state = QLA_TGT_STATE_DATA_IN;
3261                 dump_stack();
3262         } else
3263                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3264         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3265 }
3266
3267 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3268         struct qla_tgt_srr_imm *imm, int ha_locked)
3269 {
3270         struct qla_hw_data *ha = vha->hw;
3271         unsigned long flags = 0;
3272
3273         if (!ha_locked)
3274                 spin_lock_irqsave(&ha->hardware_lock, flags);
3275
3276         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3277             NOTIFY_ACK_SRR_FLAGS_REJECT,
3278             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3279             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3280
3281         if (!ha_locked)
3282                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3283
3284         kfree(imm);
3285 }
3286
3287 static void qlt_handle_srr_work(struct work_struct *work)
3288 {
3289         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3290         struct scsi_qla_host *vha = tgt->vha;
3291         struct qla_tgt_srr_ctio *sctio;
3292         unsigned long flags;
3293
3294         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3295             tgt);
3296
3297 restart:
3298         spin_lock_irqsave(&tgt->srr_lock, flags);
3299         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3300                 struct qla_tgt_srr_imm *imm, *i, *ti;
3301                 struct qla_tgt_cmd *cmd;
3302                 struct se_cmd *se_cmd;
3303
3304                 imm = NULL;
3305                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3306                                                 srr_list_entry) {
3307                         if (i->srr_id == sctio->srr_id) {
3308                                 list_del(&i->srr_list_entry);
3309                                 if (imm) {
3310                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3311                                           "qla_target(%d): There must be "
3312                                           "only one IMM SRR per CTIO SRR "
3313                                           "(IMM SRR %p, id %d, CTIO %p\n",
3314                                           vha->vp_idx, i, i->srr_id, sctio);
3315                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
3316                                 } else
3317                                         imm = i;
3318                         }
3319                 }
3320
3321                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3322                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3323                     sctio->srr_id);
3324
3325                 if (imm == NULL) {
3326                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3327                             "Not found matching IMM for SRR CTIO (id %d)\n",
3328                             sctio->srr_id);
3329                         continue;
3330                 } else
3331                         list_del(&sctio->srr_list_entry);
3332
3333                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3334
3335                 cmd = sctio->cmd;
3336                 /*
3337                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3338                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3339                  * logic..
3340                  */
3341                 cmd->offset = 0;
3342                 if (cmd->free_sg) {
3343                         kfree(cmd->sg);
3344                         cmd->sg = NULL;
3345                         cmd->free_sg = 0;
3346                 }
3347                 se_cmd = &cmd->se_cmd;
3348
3349                 cmd->sg_cnt = se_cmd->t_data_nents;
3350                 cmd->sg = se_cmd->t_data_sg;
3351
3352                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3353                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3354                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3355                     se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
3356
3357                 qlt_handle_srr(vha, sctio, imm);
3358
3359                 kfree(imm);
3360                 kfree(sctio);
3361                 goto restart;
3362         }
3363         spin_unlock_irqrestore(&tgt->srr_lock, flags);
3364 }
3365
3366 /* ha->hardware_lock supposed to be held on entry */
3367 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3368         struct imm_ntfy_from_isp *iocb)
3369 {
3370         struct qla_tgt_srr_imm *imm;
3371         struct qla_hw_data *ha = vha->hw;
3372         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3373         struct qla_tgt_srr_ctio *sctio;
3374
3375         tgt->imm_srr_id++;
3376
3377         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3378             vha->vp_idx);
3379
3380         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3381         if (imm != NULL) {
3382                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3383
3384                 /* IRQ is already OFF */
3385                 spin_lock(&tgt->srr_lock);
3386                 imm->srr_id = tgt->imm_srr_id;
3387                 list_add_tail(&imm->srr_list_entry,
3388                     &tgt->srr_imm_list);
3389                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3390                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
3391                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
3392                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3393                         int found = 0;
3394                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
3395                             srr_list_entry) {
3396                                 if (sctio->srr_id == imm->srr_id) {
3397                                         found = 1;
3398                                         break;
3399                                 }
3400                         }
3401                         if (found) {
3402                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3403                                     "Scheduling srr work\n");
3404                                 schedule_work(&tgt->srr_work);
3405                         } else {
3406                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3407                                     "qla_target(%d): imm_srr_id "
3408                                     "== ctio_srr_id (%d), but there is no "
3409                                     "corresponding SRR CTIO, deleting IMM "
3410                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3411                                     imm);
3412                                 list_del(&imm->srr_list_entry);
3413
3414                                 kfree(imm);
3415
3416                                 spin_unlock(&tgt->srr_lock);
3417                                 goto out_reject;
3418                         }
3419                 }
3420                 spin_unlock(&tgt->srr_lock);
3421         } else {
3422                 struct qla_tgt_srr_ctio *ts;
3423
3424                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3425                     "qla_target(%d): Unable to allocate SRR IMM "
3426                     "entry, SRR request will be rejected\n", vha->vp_idx);
3427
3428                 /* IRQ is already OFF */
3429                 spin_lock(&tgt->srr_lock);
3430                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3431                     srr_list_entry) {
3432                         if (sctio->srr_id == tgt->imm_srr_id) {
3433                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3434                                     "CTIO SRR %p deleted (id %d)\n",
3435                                     sctio, sctio->srr_id);
3436                                 list_del(&sctio->srr_list_entry);
3437                                 qlt_send_term_exchange(vha, sctio->cmd,
3438                                     &sctio->cmd->atio, 1);
3439                                 kfree(sctio);
3440                         }
3441                 }
3442                 spin_unlock(&tgt->srr_lock);
3443                 goto out_reject;
3444         }
3445
3446         return;
3447
3448 out_reject:
3449         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3450             NOTIFY_ACK_SRR_FLAGS_REJECT,
3451             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3452             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3453 }
3454
3455 /*
3456  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3457  */
3458 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3459         struct imm_ntfy_from_isp *iocb)
3460 {
3461         struct qla_hw_data *ha = vha->hw;
3462         uint32_t add_flags = 0;
3463         int send_notify_ack = 1;
3464         uint16_t status;
3465
3466         status = le16_to_cpu(iocb->u.isp2x.status);
3467         switch (status) {
3468         case IMM_NTFY_LIP_RESET:
3469         {
3470                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3471                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3472                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3473                     iocb->u.isp24.status_subcode);
3474
3475                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3476                         send_notify_ack = 0;
3477                 break;
3478         }
3479
3480         case IMM_NTFY_LIP_LINK_REINIT:
3481         {
3482                 struct qla_tgt *tgt = ha->tgt.qla_tgt;
3483                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3484                     "qla_target(%d): LINK REINIT (loop %#x, "
3485                     "subcode %x)\n", vha->vp_idx,
3486                     le16_to_cpu(iocb->u.isp24.nport_handle),
3487                     iocb->u.isp24.status_subcode);
3488                 if (tgt->link_reinit_iocb_pending) {
3489                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3490                             0, 0, 0, 0, 0, 0);
3491                 }
3492                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3493                 tgt->link_reinit_iocb_pending = 1;
3494                 /*
3495                  * QLogic requires to wait after LINK REINIT for possible
3496                  * PDISC or ADISC ELS commands
3497                  */
3498                 send_notify_ack = 0;
3499                 break;
3500         }
3501
3502         case IMM_NTFY_PORT_LOGOUT:
3503                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3504                     "qla_target(%d): Port logout (loop "
3505                     "%#x, subcode %x)\n", vha->vp_idx,
3506                     le16_to_cpu(iocb->u.isp24.nport_handle),
3507                     iocb->u.isp24.status_subcode);
3508
3509                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3510                         send_notify_ack = 0;
3511                 /* The sessions will be cleared in the callback, if needed */
3512                 break;
3513
3514         case IMM_NTFY_GLBL_TPRLO:
3515                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3516                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3517                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3518                         send_notify_ack = 0;
3519                 /* The sessions will be cleared in the callback, if needed */
3520                 break;
3521
3522         case IMM_NTFY_PORT_CONFIG:
3523                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3524                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3525                     status);
3526                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3527                         send_notify_ack = 0;
3528                 /* The sessions will be cleared in the callback, if needed */
3529                 break;
3530
3531         case IMM_NTFY_GLBL_LOGO:
3532                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3533                     "qla_target(%d): Link failure detected\n",
3534                     vha->vp_idx);
3535                 /* I_T nexus loss */
3536                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3537                         send_notify_ack = 0;
3538                 break;
3539
3540         case IMM_NTFY_IOCB_OVERFLOW:
3541                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3542                     "qla_target(%d): Cannot provide requested "
3543                     "capability (IOCB overflowed the immediate notify "
3544                     "resource count)\n", vha->vp_idx);
3545                 break;
3546
3547         case IMM_NTFY_ABORT_TASK:
3548                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3549                     "qla_target(%d): Abort Task (S %08x I %#x -> "
3550                     "L %#x)\n", vha->vp_idx,
3551                     le16_to_cpu(iocb->u.isp2x.seq_id),
3552                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3553                     le16_to_cpu(iocb->u.isp2x.lun));
3554                 if (qlt_abort_task(vha, iocb) == 0)
3555                         send_notify_ack = 0;
3556                 break;
3557
3558         case IMM_NTFY_RESOURCE:
3559                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3560                     "qla_target(%d): Out of resources, host %ld\n",
3561                     vha->vp_idx, vha->host_no);
3562                 break;
3563
3564         case IMM_NTFY_MSG_RX:
3565                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3566                     "qla_target(%d): Immediate notify task %x\n",
3567                     vha->vp_idx, iocb->u.isp2x.task_flags);
3568                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3569                         send_notify_ack = 0;
3570                 break;
3571
3572         case IMM_NTFY_ELS:
3573                 if (qlt_24xx_handle_els(vha, iocb) == 0)
3574                         send_notify_ack = 0;
3575                 break;
3576
3577         case IMM_NTFY_SRR:
3578                 qlt_prepare_srr_imm(vha, iocb);
3579                 send_notify_ack = 0;
3580                 break;
3581
3582         default:
3583                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3584                     "qla_target(%d): Received unknown immediate "
3585                     "notify status %x\n", vha->vp_idx, status);
3586                 break;
3587         }
3588
3589         if (send_notify_ack)
3590                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3591 }
3592
3593 /*
3594  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3595  * This function sends busy to ISP 2xxx or 24xx.
3596  */
3597 static void qlt_send_busy(struct scsi_qla_host *vha,
3598         struct atio_from_isp *atio, uint16_t status)
3599 {
3600         struct ctio7_to_24xx *ctio24;
3601         struct qla_hw_data *ha = vha->hw;
3602         request_t *pkt;
3603         struct qla_tgt_sess *sess = NULL;
3604
3605         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3606             atio->u.isp24.fcp_hdr.s_id);
3607         if (!sess) {
3608                 qlt_send_term_exchange(vha, NULL, atio, 1);
3609                 return;
3610         }
3611         /* Sending marker isn't necessary, since we called from ISR */
3612
3613         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3614         if (!pkt) {
3615                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3616                     "qla_target(%d): %s failed: unable to allocate "
3617                     "request packet", vha->vp_idx, __func__);
3618                 return;
3619         }
3620
3621         pkt->entry_count = 1;
3622         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3623
3624         ctio24 = (struct ctio7_to_24xx *)pkt;
3625         ctio24->entry_type = CTIO_TYPE7;
3626         ctio24->nport_handle = sess->loop_id;
3627         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3628         ctio24->vp_index = vha->vp_idx;
3629         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3630         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3631         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3632         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3633         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3634             __constant_cpu_to_le16(
3635                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3636                 CTIO7_FLAGS_DONT_RET_CTIO);
3637         /*
3638          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3639          * if the explicit conformation is used.
3640          */
3641         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3642         ctio24->u.status1.scsi_status = cpu_to_le16(status);
3643         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3644             &atio->u.isp24.fcp_cmnd.add_cdb[
3645             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3646         if (ctio24->u.status1.residual != 0)
3647                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3648
3649         qla2x00_start_iocbs(vha, vha->req);
3650 }
3651
3652 /* ha->hardware_lock supposed to be held on entry */
3653 /* called via callback from qla2xxx */
3654 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3655         struct atio_from_isp *atio)
3656 {
3657         struct qla_hw_data *ha = vha->hw;
3658         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3659         int rc;
3660
3661         if (unlikely(tgt == NULL)) {
3662                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3663                     "ATIO pkt, but no tgt (ha %p)", ha);
3664                 return;
3665         }
3666         ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3667             "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3668             vha->vp_idx, atio, atio->u.raw.entry_type,
3669             atio->u.raw.entry_count);
3670         /*
3671          * In tgt_stop mode we also should allow all requests to pass.
3672          * Otherwise, some commands can stuck.
3673          */
3674
3675         tgt->irq_cmd_count++;
3676
3677         switch (atio->u.raw.entry_type) {
3678         case ATIO_TYPE7:
3679                 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3680                     "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3681                     "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3682                     vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3683                     atio->u.isp24.fcp_cmnd.rddata,
3684                     atio->u.isp24.fcp_cmnd.wrdata,
3685                     atio->u.isp24.fcp_cmnd.add_cdb_len,
3686                     be32_to_cpu(get_unaligned((uint32_t *)
3687                         &atio->u.isp24.fcp_cmnd.add_cdb[
3688                         atio->u.isp24.fcp_cmnd.add_cdb_len])),
3689                     atio->u.isp24.fcp_hdr.s_id[0],
3690                     atio->u.isp24.fcp_hdr.s_id[1],
3691                     atio->u.isp24.fcp_hdr.s_id[2]);
3692
3693                 if (unlikely(atio->u.isp24.exchange_addr ==
3694                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3695                         ql_dbg(ql_dbg_tgt, vha, 0xe058,
3696                             "qla_target(%d): ATIO_TYPE7 "
3697                             "received with UNKNOWN exchange address, "
3698                             "sending QUEUE_FULL\n", vha->vp_idx);
3699                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3700                         break;
3701                 }
3702                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3703                         rc = qlt_handle_cmd_for_atio(vha, atio);
3704                 else
3705                         rc = qlt_handle_task_mgmt(vha, atio);
3706                 if (unlikely(rc != 0)) {
3707                         if (rc == -ESRCH) {
3708 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3709                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3710 #else
3711                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3712 #endif
3713                         } else {
3714                                 if (tgt->tgt_stop) {
3715                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
3716                                             "qla_target: Unable to send "
3717                                             "command to target for req, "
3718                                             "ignoring.\n");
3719                                 } else {
3720                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3721                                             "qla_target(%d): Unable to send "
3722                                             "command to target, sending BUSY "
3723                                             "status.\n", vha->vp_idx);
3724                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3725                                 }
3726                         }
3727                 }
3728                 break;
3729
3730         case IMMED_NOTIFY_TYPE:
3731         {
3732                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3733                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3734                             "qla_target(%d): Received ATIO packet %x "
3735                             "with error status %x\n", vha->vp_idx,
3736                             atio->u.raw.entry_type,
3737                             atio->u.isp2x.entry_status);
3738                         break;
3739                 }
3740                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3741                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3742                 break;
3743         }
3744
3745         default:
3746                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3747                     "qla_target(%d): Received unknown ATIO atio "
3748                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3749                 break;
3750         }
3751
3752         tgt->irq_cmd_count--;
3753 }
3754
3755 /* ha->hardware_lock supposed to be held on entry */
3756 /* called via callback from qla2xxx */
3757 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3758 {
3759         struct qla_hw_data *ha = vha->hw;
3760         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3761
3762         if (unlikely(tgt == NULL)) {
3763                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3764                     "qla_target(%d): Response pkt %x received, but no "
3765                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3766                 return;
3767         }
3768
3769         ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3770             "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3771             "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3772             pkt->entry_count, pkt->entry_status, pkt->handle);
3773
3774         /*
3775          * In tgt_stop mode we also should allow all requests to pass.
3776          * Otherwise, some commands can stuck.
3777          */
3778
3779         tgt->irq_cmd_count++;
3780
3781         switch (pkt->entry_type) {
3782         case CTIO_TYPE7:
3783         {
3784                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3785                 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3786                     vha->vp_idx);
3787                 qlt_do_ctio_completion(vha, entry->handle,
3788                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3789                     entry);
3790                 break;
3791         }
3792
3793         case ACCEPT_TGT_IO_TYPE:
3794         {
3795                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3796                 int rc;
3797                 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3798                     "ACCEPT_TGT_IO instance %d status %04x "
3799                     "lun %04x read/write %d data_length %04x "
3800                     "target_id %02x rx_id %04x\n ", vha->vp_idx,
3801                     le16_to_cpu(atio->u.isp2x.status),
3802                     le16_to_cpu(atio->u.isp2x.lun),
3803                     atio->u.isp2x.execution_codes,
3804                     le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3805                     atio), atio->u.isp2x.rx_id);
3806                 if (atio->u.isp2x.status !=
3807                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3808                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3809                             "qla_target(%d): ATIO with error "
3810                             "status %x received\n", vha->vp_idx,
3811                             le16_to_cpu(atio->u.isp2x.status));
3812                         break;
3813                 }
3814                 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3815                     "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3816                     atio->u.isp2x.cdb[0], (unsigned long
3817                     int)sizeof(atio->u.isp2x.cdb));
3818
3819                 rc = qlt_handle_cmd_for_atio(vha, atio);
3820                 if (unlikely(rc != 0)) {
3821                         if (rc == -ESRCH) {
3822 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3823                                 qlt_send_busy(vha, atio, 0);
3824 #else
3825                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3826 #endif
3827                         } else {
3828                                 if (tgt->tgt_stop) {
3829                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3830                                             "qla_target: Unable to send "
3831                                             "command to target, sending TERM "
3832                                             "EXCHANGE for rsp\n");
3833                                         qlt_send_term_exchange(vha, NULL,
3834                                             atio, 1);
3835                                 } else {
3836                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
3837                                             "qla_target(%d): Unable to send "
3838                                             "command to target, sending BUSY "
3839                                             "status\n", vha->vp_idx);
3840                                         qlt_send_busy(vha, atio, 0);
3841                                 }
3842                         }
3843                 }
3844         }
3845         break;
3846
3847         case CONTINUE_TGT_IO_TYPE:
3848         {
3849                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3850                 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3851                     "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3852                 qlt_do_ctio_completion(vha, entry->handle,
3853                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3854                     entry);
3855                 break;
3856         }
3857
3858         case CTIO_A64_TYPE:
3859         {
3860                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3861                 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3862                     vha->vp_idx);
3863                 qlt_do_ctio_completion(vha, entry->handle,
3864                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3865                     entry);
3866                 break;
3867         }
3868
3869         case IMMED_NOTIFY_TYPE:
3870                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3871                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3872                 break;
3873
3874         case NOTIFY_ACK_TYPE:
3875                 if (tgt->notify_ack_expected > 0) {
3876                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3877                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
3878                             "NOTIFY_ACK seq %08x status %x\n",
3879                             le16_to_cpu(entry->u.isp2x.seq_id),
3880                             le16_to_cpu(entry->u.isp2x.status));
3881                         tgt->notify_ack_expected--;
3882                         if (entry->u.isp2x.status !=
3883                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3884                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3885                                     "qla_target(%d): NOTIFY_ACK "
3886                                     "failed %x\n", vha->vp_idx,
3887                                     le16_to_cpu(entry->u.isp2x.status));
3888                         }
3889                 } else {
3890                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
3891                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3892                             vha->vp_idx);
3893                 }
3894                 break;
3895
3896         case ABTS_RECV_24XX:
3897                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3898                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3899                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3900                 break;
3901
3902         case ABTS_RESP_24XX:
3903                 if (tgt->abts_resp_expected > 0) {
3904                         struct abts_resp_from_24xx_fw *entry =
3905                                 (struct abts_resp_from_24xx_fw *)pkt;
3906                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
3907                             "ABTS_RESP_24XX: compl_status %x\n",
3908                             entry->compl_status);
3909                         tgt->abts_resp_expected--;
3910                         if (le16_to_cpu(entry->compl_status) !=
3911                             ABTS_RESP_COMPL_SUCCESS) {
3912                                 if ((entry->error_subcode1 == 0x1E) &&
3913                                     (entry->error_subcode2 == 0)) {
3914                                         /*
3915                                          * We've got a race here: aborted
3916                                          * exchange not terminated, i.e.
3917                                          * response for the aborted command was
3918                                          * sent between the abort request was
3919                                          * received and processed.
3920                                          * Unfortunately, the firmware has a
3921                                          * silly requirement that all aborted
3922                                          * exchanges must be explicitely
3923                                          * terminated, otherwise it refuses to
3924                                          * send responses for the abort
3925                                          * requests. So, we have to
3926                                          * (re)terminate the exchange and retry
3927                                          * the abort response.
3928                                          */
3929                                         qlt_24xx_retry_term_exchange(vha,
3930                                             entry);
3931                                 } else
3932                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
3933                                             "qla_target(%d): ABTS_RESP_24XX "
3934                                             "failed %x (subcode %x:%x)",
3935                                             vha->vp_idx, entry->compl_status,
3936                                             entry->error_subcode1,
3937                                             entry->error_subcode2);
3938                         }
3939                 } else {
3940                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
3941                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
3942                             "received\n", vha->vp_idx);
3943                 }
3944                 break;
3945
3946         default:
3947                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3948                     "qla_target(%d): Received unknown response pkt "
3949                     "type %x\n", vha->vp_idx, pkt->entry_type);
3950                 break;
3951         }
3952
3953         tgt->irq_cmd_count--;
3954 }
3955
3956 /*
3957  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3958  */
3959 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3960         uint16_t *mailbox)
3961 {
3962         struct qla_hw_data *ha = vha->hw;
3963         struct qla_tgt *tgt = ha->tgt.qla_tgt;
3964         int reason_code;
3965
3966         ql_dbg(ql_dbg_tgt, vha, 0xe039,
3967             "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3968             vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3969             ha->operating_mode, ha->current_topology);
3970
3971         if (!ha->tgt.tgt_ops)
3972                 return;
3973
3974         if (unlikely(tgt == NULL)) {
3975                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3976                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3977                 return;
3978         }
3979
3980         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3981             IS_QLA2100(ha))
3982                 return;
3983         /*
3984          * In tgt_stop mode we also should allow all requests to pass.
3985          * Otherwise, some commands can stuck.
3986          */
3987
3988         tgt->irq_cmd_count++;
3989
3990         switch (code) {
3991         case MBA_RESET:                 /* Reset */
3992         case MBA_SYSTEM_ERR:            /* System Error */
3993         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
3994         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
3995                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
3996                     "qla_target(%d): System error async event %#x "
3997                     "occured", vha->vp_idx, code);
3998                 break;
3999         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
4000                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4001                 break;
4002
4003         case MBA_LOOP_UP:
4004         {
4005                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
4006                     "qla_target(%d): Async LOOP_UP occured "
4007                     "(m[1]=%x, m[2]=%x, m[3]=%x, m[4]=%x)", vha->vp_idx,
4008                     le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]),
4009                     le16_to_cpu(mailbox[3]), le16_to_cpu(mailbox[4]));
4010                 if (tgt->link_reinit_iocb_pending) {
4011                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
4012                             0, 0, 0, 0, 0, 0);
4013                         tgt->link_reinit_iocb_pending = 0;
4014                 }
4015                 break;
4016         }
4017
4018         case MBA_LIP_OCCURRED:
4019         case MBA_LOOP_DOWN:
4020         case MBA_LIP_RESET:
4021         case MBA_RSCN_UPDATE:
4022                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
4023                     "qla_target(%d): Async event %#x occured "
4024                     "(m[1]=%x, m[2]=%x, m[3]=%x, m[4]=%x)", vha->vp_idx, code,
4025                     le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]),
4026                     le16_to_cpu(mailbox[3]), le16_to_cpu(mailbox[4]));
4027                 break;
4028
4029         case MBA_PORT_UPDATE:
4030                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
4031                     "qla_target(%d): Port update async event %#x "
4032                     "occured: updating the ports database (m[1]=%x, m[2]=%x, "
4033                     "m[3]=%x, m[4]=%x)", vha->vp_idx, code,
4034                     le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]),
4035                     le16_to_cpu(mailbox[3]), le16_to_cpu(mailbox[4]));
4036                 reason_code = le16_to_cpu(mailbox[2]);
4037                 if (reason_code == 0x4)
4038                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
4039                             "Async MB 2: Got PLOGI Complete\n");
4040                 else if (reason_code == 0x7)
4041                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
4042                             "Async MB 2: Port Logged Out\n");
4043                 break;
4044
4045         default:
4046                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
4047                     "qla_target(%d): Async event %#x occured: "
4048                     "ignore (m[1]=%x, m[2]=%x, m[3]=%x, m[4]=%x)", vha->vp_idx,
4049                     code, le16_to_cpu(mailbox[1]), le16_to_cpu(mailbox[2]),
4050                     le16_to_cpu(mailbox[3]), le16_to_cpu(mailbox[4]));
4051                 break;
4052         }
4053
4054         tgt->irq_cmd_count--;
4055 }
4056
4057 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
4058         uint16_t loop_id)
4059 {
4060         fc_port_t *fcport;
4061         int rc;
4062
4063         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
4064         if (!fcport) {
4065                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
4066                     "qla_target(%d): Allocation of tmp FC port failed",
4067                     vha->vp_idx);
4068                 return NULL;
4069         }
4070
4071         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
4072
4073         fcport->loop_id = loop_id;
4074
4075         rc = qla2x00_get_port_database(vha, fcport, 0);
4076         if (rc != QLA_SUCCESS) {
4077                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
4078                     "qla_target(%d): Failed to retrieve fcport "
4079                     "information -- get_port_database() returned %x "
4080                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
4081                 kfree(fcport);
4082                 return NULL;
4083         }
4084
4085         return fcport;
4086 }
4087
4088 /* Must be called under tgt_mutex */
4089 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
4090         uint8_t *s_id)
4091 {
4092         struct qla_hw_data *ha = vha->hw;
4093         struct qla_tgt_sess *sess = NULL;
4094         fc_port_t *fcport = NULL;
4095         int rc, global_resets;
4096         uint16_t loop_id = 0;
4097
4098 retry:
4099         global_resets = atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count);
4100
4101         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
4102         if (rc != 0) {
4103                 if ((s_id[0] == 0xFF) &&
4104                     (s_id[1] == 0xFC)) {
4105                         /*
4106                          * This is Domain Controller, so it should be
4107                          * OK to drop SCSI commands from it.
4108                          */
4109                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
4110                             "Unable to find initiator with S_ID %x:%x:%x",
4111                             s_id[0], s_id[1], s_id[2]);
4112                 } else
4113                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
4114                             "qla_target(%d): Unable to find "
4115                             "initiator with S_ID %x:%x:%x",
4116                             vha->vp_idx, s_id[0], s_id[1],
4117                             s_id[2]);
4118                 return NULL;
4119         }
4120
4121         fcport = qlt_get_port_database(vha, loop_id);
4122         if (!fcport)
4123                 return NULL;
4124
4125         if (global_resets !=
4126             atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count)) {
4127                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
4128                     "qla_target(%d): global reset during session discovery "
4129                     "(counter was %d, new %d), retrying", vha->vp_idx,
4130                     global_resets,
4131                     atomic_read(&ha->tgt.qla_tgt->tgt_global_resets_count));
4132                 goto retry;
4133         }
4134
4135         sess = qlt_create_sess(vha, fcport, true);
4136
4137         kfree(fcport);
4138         return sess;
4139 }
4140
4141 static void qlt_abort_work(struct qla_tgt *tgt,
4142         struct qla_tgt_sess_work_param *prm)
4143 {
4144         struct scsi_qla_host *vha = tgt->vha;
4145         struct qla_hw_data *ha = vha->hw;
4146         struct qla_tgt_sess *sess = NULL;
4147         unsigned long flags;
4148         uint32_t be_s_id;
4149         uint8_t s_id[3];
4150         int rc;
4151
4152         spin_lock_irqsave(&ha->hardware_lock, flags);
4153
4154         if (tgt->tgt_stop)
4155                 goto out_term;
4156
4157         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
4158         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
4159         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
4160
4161         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
4162             (unsigned char *)&be_s_id);
4163         if (!sess) {
4164                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4165
4166                 mutex_lock(&ha->tgt.tgt_mutex);
4167                 sess = qlt_make_local_sess(vha, s_id);
4168                 /* sess has got an extra creation ref */
4169                 mutex_unlock(&ha->tgt.tgt_mutex);
4170
4171                 spin_lock_irqsave(&ha->hardware_lock, flags);
4172                 if (!sess)
4173                         goto out_term;
4174         } else {
4175                 kref_get(&sess->se_sess->sess_kref);
4176         }
4177
4178         if (tgt->tgt_stop)
4179                 goto out_term;
4180
4181         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4182         if (rc != 0)
4183                 goto out_term;
4184         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4185
4186         ha->tgt.tgt_ops->put_sess(sess);
4187         return;
4188
4189 out_term:
4190         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4191         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4192         if (sess)
4193                 ha->tgt.tgt_ops->put_sess(sess);
4194 }
4195
4196 static void qlt_tmr_work(struct qla_tgt *tgt,
4197         struct qla_tgt_sess_work_param *prm)
4198 {
4199         struct atio_from_isp *a = &prm->tm_iocb2;
4200         struct scsi_qla_host *vha = tgt->vha;
4201         struct qla_hw_data *ha = vha->hw;
4202         struct qla_tgt_sess *sess = NULL;
4203         unsigned long flags;
4204         uint8_t *s_id = NULL; /* to hide compiler warnings */
4205         int rc;
4206         uint32_t lun, unpacked_lun;
4207         int lun_size, fn;
4208         void *iocb;
4209
4210         spin_lock_irqsave(&ha->hardware_lock, flags);
4211
4212         if (tgt->tgt_stop)
4213                 goto out_term;
4214
4215         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4216         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4217         if (!sess) {
4218                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4219
4220                 mutex_lock(&ha->tgt.tgt_mutex);
4221                 sess = qlt_make_local_sess(vha, s_id);
4222                 /* sess has got an extra creation ref */
4223                 mutex_unlock(&ha->tgt.tgt_mutex);
4224
4225                 spin_lock_irqsave(&ha->hardware_lock, flags);
4226                 if (!sess)
4227                         goto out_term;
4228         } else {
4229                 kref_get(&sess->se_sess->sess_kref);
4230         }
4231
4232         iocb = a;
4233         lun = a->u.isp24.fcp_cmnd.lun;
4234         lun_size = sizeof(lun);
4235         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4236         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4237
4238         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4239         if (rc != 0)
4240                 goto out_term;
4241         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4242
4243         ha->tgt.tgt_ops->put_sess(sess);
4244         return;
4245
4246 out_term:
4247         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4248         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4249         if (sess)
4250                 ha->tgt.tgt_ops->put_sess(sess);
4251 }
4252
4253 static void qlt_sess_work_fn(struct work_struct *work)
4254 {
4255         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4256         struct scsi_qla_host *vha = tgt->vha;
4257         unsigned long flags;
4258
4259         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4260
4261         spin_lock_irqsave(&tgt->sess_work_lock, flags);
4262         while (!list_empty(&tgt->sess_works_list)) {
4263                 struct qla_tgt_sess_work_param *prm = list_entry(
4264                     tgt->sess_works_list.next, typeof(*prm),
4265                     sess_works_list_entry);
4266
4267                 /*
4268                  * This work can be scheduled on several CPUs at time, so we
4269                  * must delete the entry to eliminate double processing
4270                  */
4271                 list_del(&prm->sess_works_list_entry);
4272
4273                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4274
4275                 switch (prm->type) {
4276                 case QLA_TGT_SESS_WORK_ABORT:
4277                         qlt_abort_work(tgt, prm);
4278                         break;
4279                 case QLA_TGT_SESS_WORK_TM:
4280                         qlt_tmr_work(tgt, prm);
4281                         break;
4282                 default:
4283                         BUG_ON(1);
4284                         break;
4285                 }
4286
4287                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4288
4289                 kfree(prm);
4290         }
4291         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4292 }
4293
4294 /* Must be called under tgt_host_action_mutex */
4295 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4296 {
4297         struct qla_tgt *tgt;
4298
4299         if (!QLA_TGT_MODE_ENABLED())
4300                 return 0;
4301
4302         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4303             "Registering target for host %ld(%p)", base_vha->host_no, ha);
4304
4305         BUG_ON((ha->tgt.qla_tgt != NULL) || (ha->tgt.tgt_ops != NULL));
4306
4307         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4308         if (!tgt) {
4309                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4310                     "Unable to allocate struct qla_tgt\n");
4311                 return -ENOMEM;
4312         }
4313
4314         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4315                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4316
4317         tgt->ha = ha;
4318         tgt->vha = base_vha;
4319         init_waitqueue_head(&tgt->waitQ);
4320         INIT_LIST_HEAD(&tgt->sess_list);
4321         INIT_LIST_HEAD(&tgt->del_sess_list);
4322         INIT_DELAYED_WORK(&tgt->sess_del_work,
4323                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4324         spin_lock_init(&tgt->sess_work_lock);
4325         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4326         INIT_LIST_HEAD(&tgt->sess_works_list);
4327         spin_lock_init(&tgt->srr_lock);
4328         INIT_LIST_HEAD(&tgt->srr_ctio_list);
4329         INIT_LIST_HEAD(&tgt->srr_imm_list);
4330         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4331         atomic_set(&tgt->tgt_global_resets_count, 0);
4332
4333         ha->tgt.qla_tgt = tgt;
4334
4335         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4336                 "qla_target(%d): using 64 Bit PCI addressing",
4337                 base_vha->vp_idx);
4338         tgt->tgt_enable_64bit_addr = 1;
4339         /* 3 is reserved */
4340         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4341         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4342         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4343
4344         mutex_lock(&qla_tgt_mutex);
4345         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4346         mutex_unlock(&qla_tgt_mutex);
4347
4348         return 0;
4349 }
4350
4351 /* Must be called under tgt_host_action_mutex */
4352 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4353 {
4354         if (!ha->tgt.qla_tgt)
4355                 return 0;
4356
4357         mutex_lock(&qla_tgt_mutex);
4358         list_del(&ha->tgt.qla_tgt->tgt_list_entry);
4359         mutex_unlock(&qla_tgt_mutex);
4360
4361         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4362             vha->host_no, ha);
4363         qlt_release(ha->tgt.qla_tgt);
4364
4365         return 0;
4366 }
4367
4368 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4369         unsigned char *b)
4370 {
4371         int i;
4372
4373         pr_debug("qla2xxx HW vha->node_name: ");
4374         for (i = 0; i < WWN_SIZE; i++)
4375                 pr_debug("%02x ", vha->node_name[i]);
4376         pr_debug("\n");
4377         pr_debug("qla2xxx HW vha->port_name: ");
4378         for (i = 0; i < WWN_SIZE; i++)
4379                 pr_debug("%02x ", vha->port_name[i]);
4380         pr_debug("\n");
4381
4382         pr_debug("qla2xxx passed configfs WWPN: ");
4383         put_unaligned_be64(wwpn, b);
4384         for (i = 0; i < WWN_SIZE; i++)
4385                 pr_debug("%02x ", b[i]);
4386         pr_debug("\n");
4387 }
4388
4389 /**
4390  * qla_tgt_lport_register - register lport with external module
4391  *
4392  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4393  * @wwpn: Passwd FC target WWPN
4394  * @callback:  lport initialization callback for tcm_qla2xxx code
4395  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4396  */
4397 int qlt_lport_register(struct qla_tgt_func_tmpl *qla_tgt_ops, u64 wwpn,
4398         int (*callback)(struct scsi_qla_host *), void *target_lport_ptr)
4399 {
4400         struct qla_tgt *tgt;
4401         struct scsi_qla_host *vha;
4402         struct qla_hw_data *ha;
4403         struct Scsi_Host *host;
4404         unsigned long flags;
4405         int rc;
4406         u8 b[WWN_SIZE];
4407
4408         mutex_lock(&qla_tgt_mutex);
4409         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4410                 vha = tgt->vha;
4411                 ha = vha->hw;
4412
4413                 host = vha->host;
4414                 if (!host)
4415                         continue;
4416
4417                 if (ha->tgt.tgt_ops != NULL)
4418                         continue;
4419
4420                 if (!(host->hostt->supported_mode & MODE_TARGET))
4421                         continue;
4422
4423                 spin_lock_irqsave(&ha->hardware_lock, flags);
4424                 if (host->active_mode & MODE_TARGET) {
4425                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4426                             host->host_no);
4427                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4428                         continue;
4429                 }
4430                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4431
4432                 if (!scsi_host_get(host)) {
4433                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
4434                             "Unable to scsi_host_get() for"
4435                             " qla2xxx scsi_host\n");
4436                         continue;
4437                 }
4438                 qlt_lport_dump(vha, wwpn, b);
4439
4440                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4441                         scsi_host_put(host);
4442                         continue;
4443                 }
4444                 /*
4445                  * Setup passed parameters ahead of invoking callback
4446                  */
4447                 ha->tgt.tgt_ops = qla_tgt_ops;
4448                 ha->tgt.target_lport_ptr = target_lport_ptr;
4449                 rc = (*callback)(vha);
4450                 if (rc != 0) {
4451                         ha->tgt.tgt_ops = NULL;
4452                         ha->tgt.target_lport_ptr = NULL;
4453                 }
4454                 mutex_unlock(&qla_tgt_mutex);
4455                 return rc;
4456         }
4457         mutex_unlock(&qla_tgt_mutex);
4458
4459         return -ENODEV;
4460 }
4461 EXPORT_SYMBOL(qlt_lport_register);
4462
4463 /**
4464  * qla_tgt_lport_deregister - Degister lport
4465  *
4466  * @vha:  Registered scsi_qla_host pointer
4467  */
4468 void qlt_lport_deregister(struct scsi_qla_host *vha)
4469 {
4470         struct qla_hw_data *ha = vha->hw;
4471         struct Scsi_Host *sh = vha->host;
4472         /*
4473          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4474          */
4475         ha->tgt.target_lport_ptr = NULL;
4476         ha->tgt.tgt_ops = NULL;
4477         /*
4478          * Release the Scsi_Host reference for the underlying qla2xxx host
4479          */
4480         scsi_host_put(sh);
4481 }
4482 EXPORT_SYMBOL(qlt_lport_deregister);
4483
4484 /* Must be called under HW lock */
4485 void qlt_set_mode(struct scsi_qla_host *vha)
4486 {
4487         struct qla_hw_data *ha = vha->hw;
4488
4489         switch (ql2x_ini_mode) {
4490         case QLA2XXX_INI_MODE_DISABLED:
4491         case QLA2XXX_INI_MODE_EXCLUSIVE:
4492                 vha->host->active_mode = MODE_TARGET;
4493                 break;
4494         case QLA2XXX_INI_MODE_ENABLED:
4495                 vha->host->active_mode |= MODE_TARGET;
4496                 break;
4497         default:
4498                 break;
4499         }
4500
4501         if (ha->tgt.ini_mode_force_reverse)
4502                 qla_reverse_ini_mode(vha);
4503 }
4504
4505 /* Must be called under HW lock */
4506 void qlt_clear_mode(struct scsi_qla_host *vha)
4507 {
4508         struct qla_hw_data *ha = vha->hw;
4509
4510         switch (ql2x_ini_mode) {
4511         case QLA2XXX_INI_MODE_DISABLED:
4512                 vha->host->active_mode = MODE_UNKNOWN;
4513                 break;
4514         case QLA2XXX_INI_MODE_EXCLUSIVE:
4515                 vha->host->active_mode = MODE_INITIATOR;
4516                 break;
4517         case QLA2XXX_INI_MODE_ENABLED:
4518                 vha->host->active_mode &= ~MODE_TARGET;
4519                 break;
4520         default:
4521                 break;
4522         }
4523
4524         if (ha->tgt.ini_mode_force_reverse)
4525                 qla_reverse_ini_mode(vha);
4526 }
4527
4528 /*
4529  * qla_tgt_enable_vha - NO LOCK HELD
4530  *
4531  * host_reset, bring up w/ Target Mode Enabled
4532  */
4533 void
4534 qlt_enable_vha(struct scsi_qla_host *vha)
4535 {
4536         struct qla_hw_data *ha = vha->hw;
4537         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4538         unsigned long flags;
4539
4540         if (!tgt) {
4541                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4542                     "Unable to locate qla_tgt pointer from"
4543                     " struct qla_hw_data\n");
4544                 dump_stack();
4545                 return;
4546         }
4547
4548         spin_lock_irqsave(&ha->hardware_lock, flags);
4549         tgt->tgt_stopped = 0;
4550         qlt_set_mode(vha);
4551         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4552
4553         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4554         qla2xxx_wake_dpc(vha);
4555         qla2x00_wait_for_hba_online(vha);
4556 }
4557 EXPORT_SYMBOL(qlt_enable_vha);
4558
4559 /*
4560  * qla_tgt_disable_vha - NO LOCK HELD
4561  *
4562  * Disable Target Mode and reset the adapter
4563  */
4564 void
4565 qlt_disable_vha(struct scsi_qla_host *vha)
4566 {
4567         struct qla_hw_data *ha = vha->hw;
4568         struct qla_tgt *tgt = ha->tgt.qla_tgt;
4569         unsigned long flags;
4570
4571         if (!tgt) {
4572                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4573                     "Unable to locate qla_tgt pointer from"
4574                     " struct qla_hw_data\n");
4575                 dump_stack();
4576                 return;
4577         }
4578
4579         spin_lock_irqsave(&ha->hardware_lock, flags);
4580         qlt_clear_mode(vha);
4581         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4582
4583         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4584         qla2xxx_wake_dpc(vha);
4585         qla2x00_wait_for_hba_online(vha);
4586 }
4587
4588 /*
4589  * Called from qla_init.c:qla24xx_vport_create() contex to setup
4590  * the target mode specific struct scsi_qla_host and struct qla_hw_data
4591  * members.
4592  */
4593 void
4594 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4595 {
4596         if (!qla_tgt_mode_enabled(vha))
4597                 return;
4598
4599         mutex_init(&ha->tgt.tgt_mutex);
4600         mutex_init(&ha->tgt.tgt_host_action_mutex);
4601
4602         qlt_clear_mode(vha);
4603
4604         /*
4605          * NOTE: Currently the value is kept the same for <24xx and
4606          * >=24xx ISPs. If it is necessary to change it,
4607          * the check should be added for specific ISPs,
4608          * assigning the value appropriately.
4609          */
4610         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4611 }
4612
4613 void
4614 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4615 {
4616         /*
4617          * FC-4 Feature bit 0 indicates target functionality to the name server.
4618          */
4619         if (qla_tgt_mode_enabled(vha)) {
4620                 if (qla_ini_mode_enabled(vha))
4621                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4622                 else
4623                         ct_req->req.rff_id.fc4_feature = BIT_0;
4624         } else if (qla_ini_mode_enabled(vha)) {
4625                 ct_req->req.rff_id.fc4_feature = BIT_1;
4626         }
4627 }
4628
4629 /*
4630  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4631  * @ha: HA context
4632  *
4633  * Beginning of ATIO ring has initialization control block already built
4634  * by nvram config routine.
4635  *
4636  * Returns 0 on success.
4637  */
4638 void
4639 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4640 {
4641         struct qla_hw_data *ha = vha->hw;
4642         uint16_t cnt;
4643         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4644
4645         if (!qla_tgt_mode_enabled(vha))
4646                 return;
4647
4648         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4649                 pkt->u.raw.signature = ATIO_PROCESSED;
4650                 pkt++;
4651         }
4652
4653 }
4654
4655 /*
4656  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4657  * @ha: SCSI driver HA context
4658  */
4659 void
4660 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4661 {
4662         struct qla_hw_data *ha = vha->hw;
4663         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
4664         struct atio_from_isp *pkt;
4665         int cnt, i;
4666
4667         if (!vha->flags.online)
4668                 return;
4669
4670         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4671                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4672                 cnt = pkt->u.raw.entry_count;
4673
4674                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4675
4676                 for (i = 0; i < cnt; i++) {
4677                         ha->tgt.atio_ring_index++;
4678                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4679                                 ha->tgt.atio_ring_index = 0;
4680                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4681                         } else
4682                                 ha->tgt.atio_ring_ptr++;
4683
4684                         pkt->u.raw.signature = ATIO_PROCESSED;
4685                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4686                 }
4687                 wmb();
4688         }
4689
4690         /* Adjust ring index */
4691         WRT_REG_DWORD(&reg->atio_q_out, ha->tgt.atio_ring_index);
4692 }
4693
4694 void
4695 qlt_24xx_config_rings(struct scsi_qla_host *vha, device_reg_t __iomem *reg)
4696 {
4697         struct qla_hw_data *ha = vha->hw;
4698
4699 /* FIXME: atio_q in/out for ha->mqenable=1..? */
4700         if (ha->mqenable) {
4701 #if 0
4702                 WRT_REG_DWORD(&reg->isp25mq.atio_q_in, 0);
4703                 WRT_REG_DWORD(&reg->isp25mq.atio_q_out, 0);
4704                 RD_REG_DWORD(&reg->isp25mq.atio_q_out);
4705 #endif
4706         } else {
4707                 /* Setup APTIO registers for target mode */
4708                 WRT_REG_DWORD(&reg->isp24.atio_q_in, 0);
4709                 WRT_REG_DWORD(&reg->isp24.atio_q_out, 0);
4710                 RD_REG_DWORD(&reg->isp24.atio_q_out);
4711         }
4712 }
4713
4714 void
4715 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4716 {
4717         struct qla_hw_data *ha = vha->hw;
4718
4719         if (qla_tgt_mode_enabled(vha)) {
4720                 if (!ha->tgt.saved_set) {
4721                         /* We save only once */
4722                         ha->tgt.saved_exchange_count = nv->exchange_count;
4723                         ha->tgt.saved_firmware_options_1 =
4724                             nv->firmware_options_1;
4725                         ha->tgt.saved_firmware_options_2 =
4726                             nv->firmware_options_2;
4727                         ha->tgt.saved_firmware_options_3 =
4728                             nv->firmware_options_3;
4729                         ha->tgt.saved_set = 1;
4730                 }
4731
4732                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4733
4734                 /* Enable target mode */
4735                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4736
4737                 /* Disable ini mode, if requested */
4738                 if (!qla_ini_mode_enabled(vha))
4739                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4740
4741                 /* Disable Full Login after LIP */
4742                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4743                 /* Enable initial LIP */
4744                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4745                 /* Enable FC tapes support */
4746                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4747                 /* Disable Full Login after LIP */
4748                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4749                 /* Enable target PRLI control */
4750                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4751         } else {
4752                 if (ha->tgt.saved_set) {
4753                         nv->exchange_count = ha->tgt.saved_exchange_count;
4754                         nv->firmware_options_1 =
4755                             ha->tgt.saved_firmware_options_1;
4756                         nv->firmware_options_2 =
4757                             ha->tgt.saved_firmware_options_2;
4758                         nv->firmware_options_3 =
4759                             ha->tgt.saved_firmware_options_3;
4760                 }
4761                 return;
4762         }
4763
4764         /* out-of-order frames reassembly */
4765         nv->firmware_options_3 |= BIT_6|BIT_9;
4766
4767         if (ha->tgt.enable_class_2) {
4768                 if (vha->flags.init_done)
4769                         fc_host_supported_classes(vha->host) =
4770                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4771
4772                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4773         } else {
4774                 if (vha->flags.init_done)
4775                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4776
4777                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4778         }
4779 }
4780
4781 void
4782 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4783         struct init_cb_24xx *icb)
4784 {
4785         struct qla_hw_data *ha = vha->hw;
4786
4787         if (ha->tgt.node_name_set) {
4788                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4789                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4790         }
4791 }
4792
4793 int
4794 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4795         struct sts_entry_24xx *pkt)
4796 {
4797         switch (pkt->entry_type) {
4798         case ABTS_RECV_24XX:
4799         case ABTS_RESP_24XX:
4800         case CTIO_TYPE7:
4801         case NOTIFY_ACK_TYPE:
4802                 return 1;
4803         default:
4804                 return 0;
4805         }
4806 }
4807
4808 void
4809 qlt_modify_vp_config(struct scsi_qla_host *vha,
4810         struct vp_config_entry_24xx *vpmod)
4811 {
4812         if (qla_tgt_mode_enabled(vha))
4813                 vpmod->options_idx1 &= ~BIT_5;
4814         /* Disable ini mode, if requested */
4815         if (!qla_ini_mode_enabled(vha))
4816                 vpmod->options_idx1 &= ~BIT_4;
4817 }
4818
4819 void
4820 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4821 {
4822         if (!QLA_TGT_MODE_ENABLED())
4823                 return;
4824
4825         mutex_init(&ha->tgt.tgt_mutex);
4826         mutex_init(&ha->tgt.tgt_host_action_mutex);
4827         qlt_clear_mode(base_vha);
4828 }
4829
4830 int
4831 qlt_mem_alloc(struct qla_hw_data *ha)
4832 {
4833         if (!QLA_TGT_MODE_ENABLED())
4834                 return 0;
4835
4836         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4837             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4838         if (!ha->tgt.tgt_vp_map)
4839                 return -ENOMEM;
4840
4841         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4842             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4843             &ha->tgt.atio_dma, GFP_KERNEL);
4844         if (!ha->tgt.atio_ring) {
4845                 kfree(ha->tgt.tgt_vp_map);
4846                 return -ENOMEM;
4847         }
4848         return 0;
4849 }
4850
4851 void
4852 qlt_mem_free(struct qla_hw_data *ha)
4853 {
4854         if (!QLA_TGT_MODE_ENABLED())
4855                 return;
4856
4857         if (ha->tgt.atio_ring) {
4858                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4859                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4860                     ha->tgt.atio_dma);
4861         }
4862         kfree(ha->tgt.tgt_vp_map);
4863 }
4864
4865 /* vport_slock to be held by the caller */
4866 void
4867 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4868 {
4869         if (!QLA_TGT_MODE_ENABLED())
4870                 return;
4871
4872         switch (cmd) {
4873         case SET_VP_IDX:
4874                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4875                 break;
4876         case SET_AL_PA:
4877                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4878                 break;
4879         case RESET_VP_IDX:
4880                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4881                 break;
4882         case RESET_AL_PA:
4883                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4884                 break;
4885         }
4886 }
4887
4888 static int __init qlt_parse_ini_mode(void)
4889 {
4890         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4891                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4892         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4893                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4894         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4895                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4896         else
4897                 return false;
4898
4899         return true;
4900 }
4901
4902 int __init qlt_init(void)
4903 {
4904         int ret;
4905
4906         if (!qlt_parse_ini_mode()) {
4907                 ql_log(ql_log_fatal, NULL, 0xe06b,
4908                     "qlt_parse_ini_mode() failed\n");
4909                 return -EINVAL;
4910         }
4911
4912         if (!QLA_TGT_MODE_ENABLED())
4913                 return 0;
4914
4915         qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4916             sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4917             NULL);
4918         if (!qla_tgt_cmd_cachep) {
4919                 ql_log(ql_log_fatal, NULL, 0xe06c,
4920                     "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4921                 return -ENOMEM;
4922         }
4923
4924         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4925             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4926             qla_tgt_mgmt_cmd), 0, NULL);
4927         if (!qla_tgt_mgmt_cmd_cachep) {
4928                 ql_log(ql_log_fatal, NULL, 0xe06d,
4929                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4930                 ret = -ENOMEM;
4931                 goto out;
4932         }
4933
4934         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4935             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4936         if (!qla_tgt_mgmt_cmd_mempool) {
4937                 ql_log(ql_log_fatal, NULL, 0xe06e,
4938                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4939                 ret = -ENOMEM;
4940                 goto out_mgmt_cmd_cachep;
4941         }
4942
4943         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4944         if (!qla_tgt_wq) {
4945                 ql_log(ql_log_fatal, NULL, 0xe06f,
4946                     "alloc_workqueue for qla_tgt_wq failed\n");
4947                 ret = -ENOMEM;
4948                 goto out_cmd_mempool;
4949         }
4950         /*
4951          * Return 1 to signal that initiator-mode is being disabled
4952          */
4953         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4954
4955 out_cmd_mempool:
4956         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4957 out_mgmt_cmd_cachep:
4958         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4959 out:
4960         kmem_cache_destroy(qla_tgt_cmd_cachep);
4961         return ret;
4962 }
4963
4964 void qlt_exit(void)
4965 {
4966         if (!QLA_TGT_MODE_ENABLED())
4967                 return;
4968
4969         destroy_workqueue(qla_tgt_wq);
4970         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4971         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4972         kmem_cache_destroy(qla_tgt_cmd_cachep);
4973 }