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