Pileus Git - ~andy/linux/blob - drivers/scsi/qla2xxx/qla_target.c

   1 /*
   2  *  qla_target.c SCSI LLD infrastructure for QLogic 22xx/23xx/24xx/25xx
   3  *
   4  *  based on qla2x00t.c code:
   5  *
   6  *  Copyright (C) 2004 - 2010 Vladislav Bolkhovitin <vst@vlnb.net>
   7  *  Copyright (C) 2004 - 2005 Leonid Stoljar
   8  *  Copyright (C) 2006 Nathaniel Clark <nate@misrule.us>
   9  *  Copyright (C) 2006 - 2010 ID7 Ltd.
  10  *
  11  *  Forward port and refactoring to modern qla2xxx and target/configfs
  12  *
  13  *  Copyright (C) 2010-2013 Nicholas A. Bellinger <nab@kernel.org>
  14  *
  15  *  This program is free software; you can redistribute it and/or
  16  *  modify it under the terms of the GNU General Public License
  17  *  as published by the Free Software Foundation, version 2
  18  *  of the License.
  19  *
  20  *  This program is distributed in the hope that it will be useful,
  21  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  *  GNU General Public License for more details.
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/pci.h>
  32 #include <linux/delay.h>
  33 #include <linux/list.h>
  34 #include <linux/workqueue.h>
  35 #include <asm/unaligned.h>
  36 #include <scsi/scsi.h>
  37 #include <scsi/scsi_host.h>
  38 #include <scsi/scsi_tcq.h>
  39 #include <target/target_core_base.h>
  40 #include <target/target_core_fabric.h>
  41
  42 #include "qla_def.h"
  43 #include "qla_target.h"
  44
  45 static char *qlini_mode = QLA2XXX_INI_MODE_STR_ENABLED;
  46 module_param(qlini_mode, charp, S_IRUGO);
  47 MODULE_PARM_DESC(qlini_mode,
  48         "Determines when initiator mode will be enabled. Possible values: "
  49         "\"exclusive\" - initiator mode will be enabled on load, "
  50         "disabled on enabling target mode and then on disabling target mode "
  51         "enabled back; "
  52         "\"disabled\" - initiator mode will never be enabled; "
  53         "\"enabled\" (default) - initiator mode will always stay enabled.");
  54
  55 int ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
  56
  57 /*
  58  * From scsi/fc/fc_fcp.h
  59  */
  60 enum fcp_resp_rsp_codes {
  61         FCP_TMF_CMPL = 0,
  62         FCP_DATA_LEN_INVALID = 1,
  63         FCP_CMND_FIELDS_INVALID = 2,
  64         FCP_DATA_PARAM_MISMATCH = 3,
  65         FCP_TMF_REJECTED = 4,
  66         FCP_TMF_FAILED = 5,
  67         FCP_TMF_INVALID_LUN = 9,
  68 };
  69
  70 /*
  71  * fc_pri_ta from scsi/fc/fc_fcp.h
  72  */
  73 #define FCP_PTA_SIMPLE      0   /* simple task attribute */
  74 #define FCP_PTA_HEADQ       1   /* head of queue task attribute */
  75 #define FCP_PTA_ORDERED     2   /* ordered task attribute */
  76 #define FCP_PTA_ACA         4   /* auto. contingent allegiance */
  77 #define FCP_PTA_MASK        7   /* mask for task attribute field */
  78 #define FCP_PRI_SHIFT       3   /* priority field starts in bit 3 */
  79 #define FCP_PRI_RESVD_MASK  0x80        /* reserved bits in priority field */
  80
  81 /*
  82  * This driver calls qla2x00_alloc_iocbs() and qla2x00_issue_marker(), which
  83  * must be called under HW lock and could unlock/lock it inside.
  84  * It isn't an issue, since in the current implementation on the time when
  85  * those functions are called:
  86  *
  87  *   - Either context is IRQ and only IRQ handler can modify HW data,
  88  *     including rings related fields,
  89  *
  90  *   - Or access to target mode variables from struct qla_tgt doesn't
  91  *     cross those functions boundaries, except tgt_stop, which
  92  *     additionally protected by irq_cmd_count.
  93  */
  94 /* Predefs for callbacks handed to qla2xxx LLD */
  95 static void qlt_24xx_atio_pkt(struct scsi_qla_host *ha,
  96         struct atio_from_isp *pkt);
  97 static void qlt_response_pkt(struct scsi_qla_host *ha, response_t *pkt);
  98 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
  99         int fn, void *iocb, int flags);
 100 static void qlt_send_term_exchange(struct scsi_qla_host *ha, struct qla_tgt_cmd
 101         *cmd, struct atio_from_isp *atio, int ha_locked);
 102 static void qlt_reject_free_srr_imm(struct scsi_qla_host *ha,
 103         struct qla_tgt_srr_imm *imm, int ha_lock);
 104 /*
 105  * Global Variables
 106  */
 107 static struct kmem_cache *qla_tgt_cmd_cachep;
 108 static struct kmem_cache *qla_tgt_mgmt_cmd_cachep;
 109 static mempool_t *qla_tgt_mgmt_cmd_mempool;
 110 static struct workqueue_struct *qla_tgt_wq;
 111 static DEFINE_MUTEX(qla_tgt_mutex);
 112 static LIST_HEAD(qla_tgt_glist);
 113
 114 /* ha->hardware_lock supposed to be held on entry (to protect tgt->sess_list) */
 115 static struct qla_tgt_sess *qlt_find_sess_by_port_name(
 116         struct qla_tgt *tgt,
 117         const uint8_t *port_name)
 118 {
 119         struct qla_tgt_sess *sess;
 120
 121         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry) {
 122                 if (!memcmp(sess->port_name, port_name, WWN_SIZE))
 123                         return sess;
 124         }
 125
 126         return NULL;
 127 }
 128
 129 /* Might release hw lock, then reaquire!! */
 130 static inline int qlt_issue_marker(struct scsi_qla_host *vha, int vha_locked)
 131 {
 132         /* Send marker if required */
 133         if (unlikely(vha->marker_needed != 0)) {
 134                 int rc = qla2x00_issue_marker(vha, vha_locked);
 135                 if (rc != QLA_SUCCESS) {
 136                         ql_dbg(ql_dbg_tgt, vha, 0xe03d,
 137                             "qla_target(%d): issue_marker() failed\n",
 138                             vha->vp_idx);
 139                 }
 140                 return rc;
 141         }
 142         return QLA_SUCCESS;
 143 }
 144
 145 static inline
 146 struct scsi_qla_host *qlt_find_host_by_d_id(struct scsi_qla_host *vha,
 147         uint8_t *d_id)
 148 {
 149         struct qla_hw_data *ha = vha->hw;
 150         uint8_t vp_idx;
 151
 152         if ((vha->d_id.b.area != d_id[1]) || (vha->d_id.b.domain != d_id[0]))
 153                 return NULL;
 154
 155         if (vha->d_id.b.al_pa == d_id[2])
 156                 return vha;
 157
 158         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 159         vp_idx = ha->tgt.tgt_vp_map[d_id[2]].idx;
 160         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 161                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 162
 163         return NULL;
 164 }
 165
 166 static inline
 167 struct scsi_qla_host *qlt_find_host_by_vp_idx(struct scsi_qla_host *vha,
 168         uint16_t vp_idx)
 169 {
 170         struct qla_hw_data *ha = vha->hw;
 171
 172         if (vha->vp_idx == vp_idx)
 173                 return vha;
 174
 175         BUG_ON(ha->tgt.tgt_vp_map == NULL);
 176         if (likely(test_bit(vp_idx, ha->vp_idx_map)))
 177                 return ha->tgt.tgt_vp_map[vp_idx].vha;
 178
 179         return NULL;
 180 }
 181
 182 void qlt_24xx_atio_pkt_all_vps(struct scsi_qla_host *vha,
 183         struct atio_from_isp *atio)
 184 {
 185         switch (atio->u.raw.entry_type) {
 186         case ATIO_TYPE7:
 187         {
 188                 struct scsi_qla_host *host = qlt_find_host_by_d_id(vha,
 189                     atio->u.isp24.fcp_hdr.d_id);
 190                 if (unlikely(NULL == host)) {
 191                         ql_dbg(ql_dbg_tgt, vha, 0xe03e,
 192                             "qla_target(%d): Received ATIO_TYPE7 "
 193                             "with unknown d_id %x:%x:%x\n", vha->vp_idx,
 194                             atio->u.isp24.fcp_hdr.d_id[0],
 195                             atio->u.isp24.fcp_hdr.d_id[1],
 196                             atio->u.isp24.fcp_hdr.d_id[2]);
 197                         break;
 198                 }
 199                 qlt_24xx_atio_pkt(host, atio);
 200                 break;
 201         }
 202
 203         case IMMED_NOTIFY_TYPE:
 204         {
 205                 struct scsi_qla_host *host = vha;
 206                 struct imm_ntfy_from_isp *entry =
 207                     (struct imm_ntfy_from_isp *)atio;
 208
 209                 if ((entry->u.isp24.vp_index != 0xFF) &&
 210                     (entry->u.isp24.nport_handle != 0xFFFF)) {
 211                         host = qlt_find_host_by_vp_idx(vha,
 212                             entry->u.isp24.vp_index);
 213                         if (unlikely(!host)) {
 214                                 ql_dbg(ql_dbg_tgt, vha, 0xe03f,
 215                                     "qla_target(%d): Received "
 216                                     "ATIO (IMMED_NOTIFY_TYPE) "
 217                                     "with unknown vp_index %d\n",
 218                                     vha->vp_idx, entry->u.isp24.vp_index);
 219                                 break;
 220                         }
 221                 }
 222                 qlt_24xx_atio_pkt(host, atio);
 223                 break;
 224         }
 225
 226         default:
 227                 ql_dbg(ql_dbg_tgt, vha, 0xe040,
 228                     "qla_target(%d): Received unknown ATIO atio "
 229                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
 230                 break;
 231         }
 232
 233         return;
 234 }
 235
 236 void qlt_response_pkt_all_vps(struct scsi_qla_host *vha, response_t *pkt)
 237 {
 238         switch (pkt->entry_type) {
 239         case CTIO_TYPE7:
 240         {
 241                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
 242                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 243                     entry->vp_index);
 244                 if (unlikely(!host)) {
 245                         ql_dbg(ql_dbg_tgt, vha, 0xe041,
 246                             "qla_target(%d): Response pkt (CTIO_TYPE7) "
 247                             "received, with unknown vp_index %d\n",
 248                             vha->vp_idx, entry->vp_index);
 249                         break;
 250                 }
 251                 qlt_response_pkt(host, pkt);
 252                 break;
 253         }
 254
 255         case IMMED_NOTIFY_TYPE:
 256         {
 257                 struct scsi_qla_host *host = vha;
 258                 struct imm_ntfy_from_isp *entry =
 259                     (struct imm_ntfy_from_isp *)pkt;
 260
 261                 host = qlt_find_host_by_vp_idx(vha, entry->u.isp24.vp_index);
 262                 if (unlikely(!host)) {
 263                         ql_dbg(ql_dbg_tgt, vha, 0xe042,
 264                             "qla_target(%d): Response pkt (IMMED_NOTIFY_TYPE) "
 265                             "received, with unknown vp_index %d\n",
 266                             vha->vp_idx, entry->u.isp24.vp_index);
 267                         break;
 268                 }
 269                 qlt_response_pkt(host, pkt);
 270                 break;
 271         }
 272
 273         case NOTIFY_ACK_TYPE:
 274         {
 275                 struct scsi_qla_host *host = vha;
 276                 struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
 277
 278                 if (0xFF != entry->u.isp24.vp_index) {
 279                         host = qlt_find_host_by_vp_idx(vha,
 280                             entry->u.isp24.vp_index);
 281                         if (unlikely(!host)) {
 282                                 ql_dbg(ql_dbg_tgt, vha, 0xe043,
 283                                     "qla_target(%d): Response "
 284                                     "pkt (NOTIFY_ACK_TYPE) "
 285                                     "received, with unknown "
 286                                     "vp_index %d\n", vha->vp_idx,
 287                                     entry->u.isp24.vp_index);
 288                                 break;
 289                         }
 290                 }
 291                 qlt_response_pkt(host, pkt);
 292                 break;
 293         }
 294
 295         case ABTS_RECV_24XX:
 296         {
 297                 struct abts_recv_from_24xx *entry =
 298                     (struct abts_recv_from_24xx *)pkt;
 299                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 300                     entry->vp_index);
 301                 if (unlikely(!host)) {
 302                         ql_dbg(ql_dbg_tgt, vha, 0xe044,
 303                             "qla_target(%d): Response pkt "
 304                             "(ABTS_RECV_24XX) received, with unknown "
 305                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 306                         break;
 307                 }
 308                 qlt_response_pkt(host, pkt);
 309                 break;
 310         }
 311
 312         case ABTS_RESP_24XX:
 313         {
 314                 struct abts_resp_to_24xx *entry =
 315                     (struct abts_resp_to_24xx *)pkt;
 316                 struct scsi_qla_host *host = qlt_find_host_by_vp_idx(vha,
 317                     entry->vp_index);
 318                 if (unlikely(!host)) {
 319                         ql_dbg(ql_dbg_tgt, vha, 0xe045,
 320                             "qla_target(%d): Response pkt "
 321                             "(ABTS_RECV_24XX) received, with unknown "
 322                             "vp_index %d\n", vha->vp_idx, entry->vp_index);
 323                         break;
 324                 }
 325                 qlt_response_pkt(host, pkt);
 326                 break;
 327         }
 328
 329         default:
 330                 qlt_response_pkt(vha, pkt);
 331                 break;
 332         }
 333
 334 }
 335
 336 static void qlt_free_session_done(struct work_struct *work)
 337 {
 338         struct qla_tgt_sess *sess = container_of(work, struct qla_tgt_sess,
 339             free_work);
 340         struct qla_tgt *tgt = sess->tgt;
 341         struct scsi_qla_host *vha = sess->vha;
 342         struct qla_hw_data *ha = vha->hw;
 343
 344         BUG_ON(!tgt);
 345         /*
 346          * Release the target session for FC Nexus from fabric module code.
 347          */
 348         if (sess->se_sess != NULL)
 349                 ha->tgt.tgt_ops->free_session(sess);
 350
 351         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf001,
 352             "Unregistration of sess %p finished\n", sess);
 353
 354         kfree(sess);
 355         /*
 356          * We need to protect against race, when tgt is freed before or
 357          * inside wake_up()
 358          */
 359         tgt->sess_count--;
 360         if (tgt->sess_count == 0)
 361                 wake_up_all(&tgt->waitQ);
 362 }
 363
 364 /* ha->hardware_lock supposed to be held on entry */
 365 void qlt_unreg_sess(struct qla_tgt_sess *sess)
 366 {
 367         struct scsi_qla_host *vha = sess->vha;
 368
 369         vha->hw->tgt.tgt_ops->clear_nacl_from_fcport_map(sess);
 370
 371         list_del(&sess->sess_list_entry);
 372         if (sess->deleted)
 373                 list_del(&sess->del_list_entry);
 374
 375         INIT_WORK(&sess->free_work, qlt_free_session_done);
 376         schedule_work(&sess->free_work);
 377 }
 378 EXPORT_SYMBOL(qlt_unreg_sess);
 379
 380 /* ha->hardware_lock supposed to be held on entry */
 381 static int qlt_reset(struct scsi_qla_host *vha, void *iocb, int mcmd)
 382 {
 383         struct qla_hw_data *ha = vha->hw;
 384         struct qla_tgt_sess *sess = NULL;
 385         uint32_t unpacked_lun, lun = 0;
 386         uint16_t loop_id;
 387         int res = 0;
 388         struct imm_ntfy_from_isp *n = (struct imm_ntfy_from_isp *)iocb;
 389         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
 390
 391         loop_id = le16_to_cpu(n->u.isp24.nport_handle);
 392         if (loop_id == 0xFFFF) {
 393 #if 0 /* FIXME: Re-enable Global event handling.. */
 394                 /* Global event */
 395                 atomic_inc(&ha->tgt.qla_tgt->tgt_global_resets_count);
 396                 qlt_clear_tgt_db(ha->tgt.qla_tgt, 1);
 397                 if (!list_empty(&ha->tgt.qla_tgt->sess_list)) {
 398                         sess = list_entry(ha->tgt.qla_tgt->sess_list.next,
 399                             typeof(*sess), sess_list_entry);
 400                         switch (mcmd) {
 401                         case QLA_TGT_NEXUS_LOSS_SESS:
 402                                 mcmd = QLA_TGT_NEXUS_LOSS;
 403                                 break;
 404                         case QLA_TGT_ABORT_ALL_SESS:
 405                                 mcmd = QLA_TGT_ABORT_ALL;
 406                                 break;
 407                         case QLA_TGT_NEXUS_LOSS:
 408                         case QLA_TGT_ABORT_ALL:
 409                                 break;
 410                         default:
 411                                 ql_dbg(ql_dbg_tgt, vha, 0xe046,
 412                                     "qla_target(%d): Not allowed "
 413                                     "command %x in %s", vha->vp_idx,
 414                                     mcmd, __func__);
 415                                 sess = NULL;
 416                                 break;
 417                         }
 418                 } else
 419                         sess = NULL;
 420 #endif
 421         } else {
 422                 sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
 423         }
 424
 425         ql_dbg(ql_dbg_tgt, vha, 0xe000,
 426             "Using sess for qla_tgt_reset: %p\n", sess);
 427         if (!sess) {
 428                 res = -ESRCH;
 429                 return res;
 430         }
 431
 432         ql_dbg(ql_dbg_tgt, vha, 0xe047,
 433             "scsi(%ld): resetting (session %p from port %8phC mcmd %x, "
 434             "loop_id %d)\n", vha->host_no, sess, sess->port_name,
 435             mcmd, loop_id);
 436
 437         lun = a->u.isp24.fcp_cmnd.lun;
 438         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
 439
 440         return qlt_issue_task_mgmt(sess, unpacked_lun, mcmd,
 441             iocb, QLA24XX_MGMT_SEND_NACK);
 442 }
 443
 444 /* ha->hardware_lock supposed to be held on entry */
 445 static void qlt_schedule_sess_for_deletion(struct qla_tgt_sess *sess,
 446         bool immediate)
 447 {
 448         struct qla_tgt *tgt = sess->tgt;
 449         uint32_t dev_loss_tmo = tgt->ha->port_down_retry_count + 5;
 450
 451         if (sess->deleted)
 452                 return;
 453
 454         ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
 455             "Scheduling sess %p for deletion\n", sess);
 456         list_add_tail(&sess->del_list_entry, &tgt->del_sess_list);
 457         sess->deleted = 1;
 458
 459         if (immediate)
 460                 dev_loss_tmo = 0;
 461
 462         sess->expires = jiffies + dev_loss_tmo * HZ;
 463
 464         ql_dbg(ql_dbg_tgt, sess->vha, 0xe048,
 465             "qla_target(%d): session for port %8phC (loop ID %d) scheduled for "
 466             "deletion in %u secs (expires: %lu) immed: %d\n",
 467             sess->vha->vp_idx, sess->port_name, sess->loop_id, dev_loss_tmo,
 468             sess->expires, immediate);
 469
 470         if (immediate)
 471                 schedule_delayed_work(&tgt->sess_del_work, 0);
 472         else
 473                 schedule_delayed_work(&tgt->sess_del_work,
 474                     sess->expires - jiffies);
 475 }
 476
 477 /* ha->hardware_lock supposed to be held on entry */
 478 static void qlt_clear_tgt_db(struct qla_tgt *tgt, bool local_only)
 479 {
 480         struct qla_tgt_sess *sess;
 481
 482         list_for_each_entry(sess, &tgt->sess_list, sess_list_entry)
 483                 qlt_schedule_sess_for_deletion(sess, true);
 484
 485         /* At this point tgt could be already dead */
 486 }
 487
 488 static int qla24xx_get_loop_id(struct scsi_qla_host *vha, const uint8_t *s_id,
 489         uint16_t *loop_id)
 490 {
 491         struct qla_hw_data *ha = vha->hw;
 492         dma_addr_t gid_list_dma;
 493         struct gid_list_info *gid_list;
 494         char *id_iter;
 495         int res, rc, i;
 496         uint16_t entries;
 497
 498         gid_list = dma_alloc_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 499             &gid_list_dma, GFP_KERNEL);
 500         if (!gid_list) {
 501                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf044,
 502                     "qla_target(%d): DMA Alloc failed of %u\n",
 503                     vha->vp_idx, qla2x00_gid_list_size(ha));
 504                 return -ENOMEM;
 505         }
 506
 507         /* Get list of logged in devices */
 508         rc = qla2x00_get_id_list(vha, gid_list, gid_list_dma, &entries);
 509         if (rc != QLA_SUCCESS) {
 510                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf045,
 511                     "qla_target(%d): get_id_list() failed: %x\n",
 512                     vha->vp_idx, rc);
 513                 res = -1;
 514                 goto out_free_id_list;
 515         }
 516
 517         id_iter = (char *)gid_list;
 518         res = -1;
 519         for (i = 0; i < entries; i++) {
 520                 struct gid_list_info *gid = (struct gid_list_info *)id_iter;
 521                 if ((gid->al_pa == s_id[2]) &&
 522                     (gid->area == s_id[1]) &&
 523                     (gid->domain == s_id[0])) {
 524                         *loop_id = le16_to_cpu(gid->loop_id);
 525                         res = 0;
 526                         break;
 527                 }
 528                 id_iter += ha->gid_list_info_size;
 529         }
 530
 531 out_free_id_list:
 532         dma_free_coherent(&ha->pdev->dev, qla2x00_gid_list_size(ha),
 533             gid_list, gid_list_dma);
 534         return res;
 535 }
 536
 537 /* ha->hardware_lock supposed to be held on entry */
 538 static void qlt_undelete_sess(struct qla_tgt_sess *sess)
 539 {
 540         BUG_ON(!sess->deleted);
 541
 542         list_del(&sess->del_list_entry);
 543         sess->deleted = 0;
 544 }
 545
 546 static void qlt_del_sess_work_fn(struct delayed_work *work)
 547 {
 548         struct qla_tgt *tgt = container_of(work, struct qla_tgt,
 549             sess_del_work);
 550         struct scsi_qla_host *vha = tgt->vha;
 551         struct qla_hw_data *ha = vha->hw;
 552         struct qla_tgt_sess *sess;
 553         unsigned long flags, elapsed;
 554
 555         spin_lock_irqsave(&ha->hardware_lock, flags);
 556         while (!list_empty(&tgt->del_sess_list)) {
 557                 sess = list_entry(tgt->del_sess_list.next, typeof(*sess),
 558                     del_list_entry);
 559                 elapsed = jiffies;
 560                 if (time_after_eq(elapsed, sess->expires)) {
 561                         qlt_undelete_sess(sess);
 562
 563                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf004,
 564                             "Timeout: sess %p about to be deleted\n",
 565                             sess);
 566                         ha->tgt.tgt_ops->shutdown_sess(sess);
 567                         ha->tgt.tgt_ops->put_sess(sess);
 568                 } else {
 569                         schedule_delayed_work(&tgt->sess_del_work,
 570                             sess->expires - elapsed);
 571                         break;
 572                 }
 573         }
 574         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 575 }
 576
 577 /*
 578  * Adds an extra ref to allow to drop hw lock after adding sess to the list.
 579  * Caller must put it.
 580  */
 581 static struct qla_tgt_sess *qlt_create_sess(
 582         struct scsi_qla_host *vha,
 583         fc_port_t *fcport,
 584         bool local)
 585 {
 586         struct qla_hw_data *ha = vha->hw;
 587         struct qla_tgt_sess *sess;
 588         unsigned long flags;
 589         unsigned char be_sid[3];
 590
 591         /* Check to avoid double sessions */
 592         spin_lock_irqsave(&ha->hardware_lock, flags);
 593         list_for_each_entry(sess, &vha->vha_tgt.qla_tgt->sess_list,
 594                                 sess_list_entry) {
 595                 if (!memcmp(sess->port_name, fcport->port_name, WWN_SIZE)) {
 596                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf005,
 597                             "Double sess %p found (s_id %x:%x:%x, "
 598                             "loop_id %d), updating to d_id %x:%x:%x, "
 599                             "loop_id %d", sess, sess->s_id.b.domain,
 600                             sess->s_id.b.al_pa, sess->s_id.b.area,
 601                             sess->loop_id, fcport->d_id.b.domain,
 602                             fcport->d_id.b.al_pa, fcport->d_id.b.area,
 603                             fcport->loop_id);
 604
 605                         if (sess->deleted)
 606                                 qlt_undelete_sess(sess);
 607
 608                         kref_get(&sess->se_sess->sess_kref);
 609                         ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 610                                                 (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 611
 612                         if (sess->local && !local)
 613                                 sess->local = 0;
 614                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 615
 616                         return sess;
 617                 }
 618         }
 619         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 620
 621         sess = kzalloc(sizeof(*sess), GFP_KERNEL);
 622         if (!sess) {
 623                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04a,
 624                     "qla_target(%u): session allocation failed, all commands "
 625                     "from port %8phC will be refused", vha->vp_idx,
 626                     fcport->port_name);
 627
 628                 return NULL;
 629         }
 630         sess->tgt = vha->vha_tgt.qla_tgt;
 631         sess->vha = vha;
 632         sess->s_id = fcport->d_id;
 633         sess->loop_id = fcport->loop_id;
 634         sess->local = local;
 635
 636         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf006,
 637             "Adding sess %p to tgt %p via ->check_initiator_node_acl()\n",
 638             sess, vha->vha_tgt.qla_tgt);
 639
 640         be_sid[0] = sess->s_id.b.domain;
 641         be_sid[1] = sess->s_id.b.area;
 642         be_sid[2] = sess->s_id.b.al_pa;
 643         /*
 644          * Determine if this fc_port->port_name is allowed to access
 645          * target mode using explict NodeACLs+MappedLUNs, or using
 646          * TPG demo mode.  If this is successful a target mode FC nexus
 647          * is created.
 648          */
 649         if (ha->tgt.tgt_ops->check_initiator_node_acl(vha,
 650             &fcport->port_name[0], sess, &be_sid[0], fcport->loop_id) < 0) {
 651                 kfree(sess);
 652                 return NULL;
 653         }
 654         /*
 655          * Take an extra reference to ->sess_kref here to handle qla_tgt_sess
 656          * access across ->hardware_lock reaquire.
 657          */
 658         kref_get(&sess->se_sess->sess_kref);
 659
 660         sess->conf_compl_supported = (fcport->flags & FCF_CONF_COMP_SUPPORTED);
 661         BUILD_BUG_ON(sizeof(sess->port_name) != sizeof(fcport->port_name));
 662         memcpy(sess->port_name, fcport->port_name, sizeof(sess->port_name));
 663
 664         spin_lock_irqsave(&ha->hardware_lock, flags);
 665         list_add_tail(&sess->sess_list_entry, &vha->vha_tgt.qla_tgt->sess_list);
 666         vha->vha_tgt.qla_tgt->sess_count++;
 667         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 668
 669         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04b,
 670             "qla_target(%d): %ssession for wwn %8phC (loop_id %d, "
 671             "s_id %x:%x:%x, confirmed completion %ssupported) added\n",
 672             vha->vp_idx, local ?  "local " : "", fcport->port_name,
 673             fcport->loop_id, sess->s_id.b.domain, sess->s_id.b.area,
 674             sess->s_id.b.al_pa, sess->conf_compl_supported ?  "" : "not ");
 675
 676         return sess;
 677 }
 678
 679 /*
 680  * Called from drivers/scsi/qla2xxx/qla_init.c:qla2x00_reg_remote_port()
 681  */
 682 void qlt_fc_port_added(struct scsi_qla_host *vha, fc_port_t *fcport)
 683 {
 684         struct qla_hw_data *ha = vha->hw;
 685         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 686         struct qla_tgt_sess *sess;
 687         unsigned long flags;
 688
 689         if (!vha->hw->tgt.tgt_ops)
 690                 return;
 691
 692         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 693                 return;
 694
 695         if (qla_ini_mode_enabled(vha))
 696                 return;
 697
 698         spin_lock_irqsave(&ha->hardware_lock, flags);
 699         if (tgt->tgt_stop) {
 700                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 701                 return;
 702         }
 703         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 704         if (!sess) {
 705                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 706
 707                 mutex_lock(&vha->vha_tgt.tgt_mutex);
 708                 sess = qlt_create_sess(vha, fcport, false);
 709                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
 710
 711                 spin_lock_irqsave(&ha->hardware_lock, flags);
 712         } else {
 713                 kref_get(&sess->se_sess->sess_kref);
 714
 715                 if (sess->deleted) {
 716                         qlt_undelete_sess(sess);
 717
 718                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04c,
 719                             "qla_target(%u): %ssession for port %8phC "
 720                             "(loop ID %d) reappeared\n", vha->vp_idx,
 721                             sess->local ? "local " : "", sess->port_name,
 722                             sess->loop_id);
 723
 724                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf007,
 725                             "Reappeared sess %p\n", sess);
 726                 }
 727                 ha->tgt.tgt_ops->update_sess(sess, fcport->d_id, fcport->loop_id,
 728                                         (fcport->flags & FCF_CONF_COMP_SUPPORTED));
 729         }
 730
 731         if (sess && sess->local) {
 732                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04d,
 733                     "qla_target(%u): local session for "
 734                     "port %8phC (loop ID %d) became global\n", vha->vp_idx,
 735                     fcport->port_name, sess->loop_id);
 736                 sess->local = 0;
 737         }
 738         ha->tgt.tgt_ops->put_sess(sess);
 739         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 740 }
 741
 742 void qlt_fc_port_deleted(struct scsi_qla_host *vha, fc_port_t *fcport)
 743 {
 744         struct qla_hw_data *ha = vha->hw;
 745         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
 746         struct qla_tgt_sess *sess;
 747         unsigned long flags;
 748
 749         if (!vha->hw->tgt.tgt_ops)
 750                 return;
 751
 752         if (!tgt || (fcport->port_type != FCT_INITIATOR))
 753                 return;
 754
 755         spin_lock_irqsave(&ha->hardware_lock, flags);
 756         if (tgt->tgt_stop) {
 757                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 758                 return;
 759         }
 760         sess = qlt_find_sess_by_port_name(tgt, fcport->port_name);
 761         if (!sess) {
 762                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 763                 return;
 764         }
 765
 766         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf008, "qla_tgt_fc_port_deleted %p", sess);
 767
 768         sess->local = 1;
 769         qlt_schedule_sess_for_deletion(sess, false);
 770         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 771 }
 772
 773 static inline int test_tgt_sess_count(struct qla_tgt *tgt)
 774 {
 775         struct qla_hw_data *ha = tgt->ha;
 776         unsigned long flags;
 777         int res;
 778         /*
 779          * We need to protect against race, when tgt is freed before or
 780          * inside wake_up()
 781          */
 782         spin_lock_irqsave(&ha->hardware_lock, flags);
 783         ql_dbg(ql_dbg_tgt, tgt->vha, 0xe002,
 784             "tgt %p, empty(sess_list)=%d sess_count=%d\n",
 785             tgt, list_empty(&tgt->sess_list), tgt->sess_count);
 786         res = (tgt->sess_count == 0);
 787         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 788
 789         return res;
 790 }
 791
 792 /* Called by tcm_qla2xxx configfs code */
 793 void qlt_stop_phase1(struct qla_tgt *tgt)
 794 {
 795         struct scsi_qla_host *vha = tgt->vha;
 796         struct qla_hw_data *ha = tgt->ha;
 797         unsigned long flags;
 798
 799         if (tgt->tgt_stop || tgt->tgt_stopped) {
 800                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04e,
 801                     "Already in tgt->tgt_stop or tgt_stopped state\n");
 802                 dump_stack();
 803                 return;
 804         }
 805
 806         ql_dbg(ql_dbg_tgt, vha, 0xe003, "Stopping target for host %ld(%p)\n",
 807             vha->host_no, vha);
 808         /*
 809          * Mutex needed to sync with qla_tgt_fc_port_[added,deleted].
 810          * Lock is needed, because we still can get an incoming packet.
 811          */
 812         mutex_lock(&vha->vha_tgt.tgt_mutex);
 813         spin_lock_irqsave(&ha->hardware_lock, flags);
 814         tgt->tgt_stop = 1;
 815         qlt_clear_tgt_db(tgt, true);
 816         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 817         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 818
 819         flush_delayed_work(&tgt->sess_del_work);
 820
 821         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf009,
 822             "Waiting for sess works (tgt %p)", tgt);
 823         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 824         while (!list_empty(&tgt->sess_works_list)) {
 825                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 826                 flush_scheduled_work();
 827                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
 828         }
 829         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 830
 831         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00a,
 832             "Waiting for tgt %p: list_empty(sess_list)=%d "
 833             "sess_count=%d\n", tgt, list_empty(&tgt->sess_list),
 834             tgt->sess_count);
 835
 836         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 837
 838         /* Big hammer */
 839         if (!ha->flags.host_shutting_down && qla_tgt_mode_enabled(vha))
 840                 qlt_disable_vha(vha);
 841
 842         /* Wait for sessions to clear out (just in case) */
 843         wait_event(tgt->waitQ, test_tgt_sess_count(tgt));
 844 }
 845 EXPORT_SYMBOL(qlt_stop_phase1);
 846
 847 /* Called by tcm_qla2xxx configfs code */
 848 void qlt_stop_phase2(struct qla_tgt *tgt)
 849 {
 850         struct qla_hw_data *ha = tgt->ha;
 851         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
 852         unsigned long flags;
 853
 854         if (tgt->tgt_stopped) {
 855                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf04f,
 856                     "Already in tgt->tgt_stopped state\n");
 857                 dump_stack();
 858                 return;
 859         }
 860
 861         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00b,
 862             "Waiting for %d IRQ commands to complete (tgt %p)",
 863             tgt->irq_cmd_count, tgt);
 864
 865         mutex_lock(&vha->vha_tgt.tgt_mutex);
 866         spin_lock_irqsave(&ha->hardware_lock, flags);
 867         while (tgt->irq_cmd_count != 0) {
 868                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
 869                 udelay(2);
 870                 spin_lock_irqsave(&ha->hardware_lock, flags);
 871         }
 872         tgt->tgt_stop = 0;
 873         tgt->tgt_stopped = 1;
 874         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 875         mutex_unlock(&vha->vha_tgt.tgt_mutex);
 876
 877         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00c, "Stop of tgt %p finished",
 878             tgt);
 879 }
 880 EXPORT_SYMBOL(qlt_stop_phase2);
 881
 882 /* Called from qlt_remove_target() -> qla2x00_remove_one() */
 883 static void qlt_release(struct qla_tgt *tgt)
 884 {
 885         scsi_qla_host_t *vha = tgt->vha;
 886
 887         if ((vha->vha_tgt.qla_tgt != NULL) && !tgt->tgt_stopped)
 888                 qlt_stop_phase2(tgt);
 889
 890         vha->vha_tgt.qla_tgt = NULL;
 891
 892         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00d,
 893             "Release of tgt %p finished\n", tgt);
 894
 895         kfree(tgt);
 896 }
 897
 898 /* ha->hardware_lock supposed to be held on entry */
 899 static int qlt_sched_sess_work(struct qla_tgt *tgt, int type,
 900         const void *param, unsigned int param_size)
 901 {
 902         struct qla_tgt_sess_work_param *prm;
 903         unsigned long flags;
 904
 905         prm = kzalloc(sizeof(*prm), GFP_ATOMIC);
 906         if (!prm) {
 907                 ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf050,
 908                     "qla_target(%d): Unable to create session "
 909                     "work, command will be refused", 0);
 910                 return -ENOMEM;
 911         }
 912
 913         ql_dbg(ql_dbg_tgt_mgt, tgt->vha, 0xf00e,
 914             "Scheduling work (type %d, prm %p)"
 915             " to find session for param %p (size %d, tgt %p)\n",
 916             type, prm, param, param_size, tgt);
 917
 918         prm->type = type;
 919         memcpy(&prm->tm_iocb, param, param_size);
 920
 921         spin_lock_irqsave(&tgt->sess_work_lock, flags);
 922         list_add_tail(&prm->sess_works_list_entry, &tgt->sess_works_list);
 923         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
 924
 925         schedule_work(&tgt->sess_work);
 926
 927         return 0;
 928 }
 929
 930 /*
 931  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 932  */
 933 static void qlt_send_notify_ack(struct scsi_qla_host *vha,
 934         struct imm_ntfy_from_isp *ntfy,
 935         uint32_t add_flags, uint16_t resp_code, int resp_code_valid,
 936         uint16_t srr_flags, uint16_t srr_reject_code, uint8_t srr_explan)
 937 {
 938         struct qla_hw_data *ha = vha->hw;
 939         request_t *pkt;
 940         struct nack_to_isp *nack;
 941
 942         ql_dbg(ql_dbg_tgt, vha, 0xe004, "Sending NOTIFY_ACK (ha=%p)\n", ha);
 943
 944         /* Send marker if required */
 945         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
 946                 return;
 947
 948         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
 949         if (!pkt) {
 950                 ql_dbg(ql_dbg_tgt, vha, 0xe049,
 951                     "qla_target(%d): %s failed: unable to allocate "
 952                     "request packet\n", vha->vp_idx, __func__);
 953                 return;
 954         }
 955
 956         if (vha->vha_tgt.qla_tgt != NULL)
 957                 vha->vha_tgt.qla_tgt->notify_ack_expected++;
 958
 959         pkt->entry_type = NOTIFY_ACK_TYPE;
 960         pkt->entry_count = 1;
 961
 962         nack = (struct nack_to_isp *)pkt;
 963         nack->ox_id = ntfy->ox_id;
 964
 965         nack->u.isp24.nport_handle = ntfy->u.isp24.nport_handle;
 966         if (le16_to_cpu(ntfy->u.isp24.status) == IMM_NTFY_ELS) {
 967                 nack->u.isp24.flags = ntfy->u.isp24.flags &
 968                         __constant_cpu_to_le32(NOTIFY24XX_FLAGS_PUREX_IOCB);
 969         }
 970         nack->u.isp24.srr_rx_id = ntfy->u.isp24.srr_rx_id;
 971         nack->u.isp24.status = ntfy->u.isp24.status;
 972         nack->u.isp24.status_subcode = ntfy->u.isp24.status_subcode;
 973         nack->u.isp24.fw_handle = ntfy->u.isp24.fw_handle;
 974         nack->u.isp24.exchange_address = ntfy->u.isp24.exchange_address;
 975         nack->u.isp24.srr_rel_offs = ntfy->u.isp24.srr_rel_offs;
 976         nack->u.isp24.srr_ui = ntfy->u.isp24.srr_ui;
 977         nack->u.isp24.srr_flags = cpu_to_le16(srr_flags);
 978         nack->u.isp24.srr_reject_code = srr_reject_code;
 979         nack->u.isp24.srr_reject_code_expl = srr_explan;
 980         nack->u.isp24.vp_index = ntfy->u.isp24.vp_index;
 981
 982         ql_dbg(ql_dbg_tgt, vha, 0xe005,
 983             "qla_target(%d): Sending 24xx Notify Ack %d\n",
 984             vha->vp_idx, nack->u.isp24.status);
 985
 986         qla2x00_start_iocbs(vha, vha->req);
 987 }
 988
 989 /*
 990  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
 991  */
 992 static void qlt_24xx_send_abts_resp(struct scsi_qla_host *vha,
 993         struct abts_recv_from_24xx *abts, uint32_t status,
 994         bool ids_reversed)
 995 {
 996         struct qla_hw_data *ha = vha->hw;
 997         struct abts_resp_to_24xx *resp;
 998         uint32_t f_ctl;
 999         uint8_t *p;
1000
1001         ql_dbg(ql_dbg_tgt, vha, 0xe006,
1002             "Sending task mgmt ABTS response (ha=%p, atio=%p, status=%x\n",
1003             ha, abts, status);
1004
1005         /* Send marker if required */
1006         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1007                 return;
1008
1009         resp = (struct abts_resp_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1010         if (!resp) {
1011                 ql_dbg(ql_dbg_tgt, vha, 0xe04a,
1012                     "qla_target(%d): %s failed: unable to allocate "
1013                     "request packet", vha->vp_idx, __func__);
1014                 return;
1015         }
1016
1017         resp->entry_type = ABTS_RESP_24XX;
1018         resp->entry_count = 1;
1019         resp->nport_handle = abts->nport_handle;
1020         resp->vp_index = vha->vp_idx;
1021         resp->sof_type = abts->sof_type;
1022         resp->exchange_address = abts->exchange_address;
1023         resp->fcp_hdr_le = abts->fcp_hdr_le;
1024         f_ctl = __constant_cpu_to_le32(F_CTL_EXCH_CONTEXT_RESP |
1025             F_CTL_LAST_SEQ | F_CTL_END_SEQ |
1026             F_CTL_SEQ_INITIATIVE);
1027         p = (uint8_t *)&f_ctl;
1028         resp->fcp_hdr_le.f_ctl[0] = *p++;
1029         resp->fcp_hdr_le.f_ctl[1] = *p++;
1030         resp->fcp_hdr_le.f_ctl[2] = *p;
1031         if (ids_reversed) {
1032                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.d_id[0];
1033                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.d_id[1];
1034                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.d_id[2];
1035                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.s_id[0];
1036                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.s_id[1];
1037                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.s_id[2];
1038         } else {
1039                 resp->fcp_hdr_le.d_id[0] = abts->fcp_hdr_le.s_id[0];
1040                 resp->fcp_hdr_le.d_id[1] = abts->fcp_hdr_le.s_id[1];
1041                 resp->fcp_hdr_le.d_id[2] = abts->fcp_hdr_le.s_id[2];
1042                 resp->fcp_hdr_le.s_id[0] = abts->fcp_hdr_le.d_id[0];
1043                 resp->fcp_hdr_le.s_id[1] = abts->fcp_hdr_le.d_id[1];
1044                 resp->fcp_hdr_le.s_id[2] = abts->fcp_hdr_le.d_id[2];
1045         }
1046         resp->exchange_addr_to_abort = abts->exchange_addr_to_abort;
1047         if (status == FCP_TMF_CMPL) {
1048                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_ACC;
1049                 resp->payload.ba_acct.seq_id_valid = SEQ_ID_INVALID;
1050                 resp->payload.ba_acct.low_seq_cnt = 0x0000;
1051                 resp->payload.ba_acct.high_seq_cnt = 0xFFFF;
1052                 resp->payload.ba_acct.ox_id = abts->fcp_hdr_le.ox_id;
1053                 resp->payload.ba_acct.rx_id = abts->fcp_hdr_le.rx_id;
1054         } else {
1055                 resp->fcp_hdr_le.r_ctl = R_CTL_BASIC_LINK_SERV | R_CTL_B_RJT;
1056                 resp->payload.ba_rjt.reason_code =
1057                         BA_RJT_REASON_CODE_UNABLE_TO_PERFORM;
1058                 /* Other bytes are zero */
1059         }
1060
1061         vha->vha_tgt.qla_tgt->abts_resp_expected++;
1062
1063         qla2x00_start_iocbs(vha, vha->req);
1064 }
1065
1066 /*
1067  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1068  */
1069 static void qlt_24xx_retry_term_exchange(struct scsi_qla_host *vha,
1070         struct abts_resp_from_24xx_fw *entry)
1071 {
1072         struct ctio7_to_24xx *ctio;
1073
1074         ql_dbg(ql_dbg_tgt, vha, 0xe007,
1075             "Sending retry TERM EXCH CTIO7 (ha=%p)\n", vha->hw);
1076         /* Send marker if required */
1077         if (qlt_issue_marker(vha, 1) != QLA_SUCCESS)
1078                 return;
1079
1080         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(vha, NULL);
1081         if (ctio == NULL) {
1082                 ql_dbg(ql_dbg_tgt, vha, 0xe04b,
1083                     "qla_target(%d): %s failed: unable to allocate "
1084                     "request packet\n", vha->vp_idx, __func__);
1085                 return;
1086         }
1087
1088         /*
1089          * We've got on entrance firmware's response on by us generated
1090          * ABTS response. So, in it ID fields are reversed.
1091          */
1092
1093         ctio->entry_type = CTIO_TYPE7;
1094         ctio->entry_count = 1;
1095         ctio->nport_handle = entry->nport_handle;
1096         ctio->handle = QLA_TGT_SKIP_HANDLE |    CTIO_COMPLETION_HANDLE_MARK;
1097         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1098         ctio->vp_index = vha->vp_idx;
1099         ctio->initiator_id[0] = entry->fcp_hdr_le.d_id[0];
1100         ctio->initiator_id[1] = entry->fcp_hdr_le.d_id[1];
1101         ctio->initiator_id[2] = entry->fcp_hdr_le.d_id[2];
1102         ctio->exchange_addr = entry->exchange_addr_to_abort;
1103         ctio->u.status1.flags =
1104             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1105                 CTIO7_FLAGS_TERMINATE);
1106         ctio->u.status1.ox_id = entry->fcp_hdr_le.ox_id;
1107
1108         qla2x00_start_iocbs(vha, vha->req);
1109
1110         qlt_24xx_send_abts_resp(vha, (struct abts_recv_from_24xx *)entry,
1111             FCP_TMF_CMPL, true);
1112 }
1113
1114 /* ha->hardware_lock supposed to be held on entry */
1115 static int __qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1116         struct abts_recv_from_24xx *abts, struct qla_tgt_sess *sess)
1117 {
1118         struct qla_hw_data *ha = vha->hw;
1119         struct se_session *se_sess = sess->se_sess;
1120         struct qla_tgt_mgmt_cmd *mcmd;
1121         struct se_cmd *se_cmd;
1122         u32 lun = 0;
1123         int rc;
1124         bool found_lun = false;
1125
1126         spin_lock(&se_sess->sess_cmd_lock);
1127         list_for_each_entry(se_cmd, &se_sess->sess_cmd_list, se_cmd_list) {
1128                 struct qla_tgt_cmd *cmd =
1129                         container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
1130                 if (cmd->tag == abts->exchange_addr_to_abort) {
1131                         lun = cmd->unpacked_lun;
1132                         found_lun = true;
1133                         break;
1134                 }
1135         }
1136         spin_unlock(&se_sess->sess_cmd_lock);
1137
1138         if (!found_lun)
1139                 return -ENOENT;
1140
1141         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf00f,
1142             "qla_target(%d): task abort (tag=%d)\n",
1143             vha->vp_idx, abts->exchange_addr_to_abort);
1144
1145         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
1146         if (mcmd == NULL) {
1147                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf051,
1148                     "qla_target(%d): %s: Allocation of ABORT cmd failed",
1149                     vha->vp_idx, __func__);
1150                 return -ENOMEM;
1151         }
1152         memset(mcmd, 0, sizeof(*mcmd));
1153
1154         mcmd->sess = sess;
1155         memcpy(&mcmd->orig_iocb.abts, abts, sizeof(mcmd->orig_iocb.abts));
1156
1157         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, TMR_ABORT_TASK,
1158             abts->exchange_addr_to_abort);
1159         if (rc != 0) {
1160                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf052,
1161                     "qla_target(%d):  tgt_ops->handle_tmr()"
1162                     " failed: %d", vha->vp_idx, rc);
1163                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1164                 return -EFAULT;
1165         }
1166
1167         return 0;
1168 }
1169
1170 /*
1171  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1172  */
1173 static void qlt_24xx_handle_abts(struct scsi_qla_host *vha,
1174         struct abts_recv_from_24xx *abts)
1175 {
1176         struct qla_hw_data *ha = vha->hw;
1177         struct qla_tgt_sess *sess;
1178         uint32_t tag = abts->exchange_addr_to_abort;
1179         uint8_t s_id[3];
1180         int rc;
1181
1182         if (le32_to_cpu(abts->fcp_hdr_le.parameter) & ABTS_PARAM_ABORT_SEQ) {
1183                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf053,
1184                     "qla_target(%d): ABTS: Abort Sequence not "
1185                     "supported\n", vha->vp_idx);
1186                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1187                 return;
1188         }
1189
1190         if (tag == ATIO_EXCHANGE_ADDRESS_UNKNOWN) {
1191                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf010,
1192                     "qla_target(%d): ABTS: Unknown Exchange "
1193                     "Address received\n", vha->vp_idx);
1194                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1195                 return;
1196         }
1197
1198         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf011,
1199             "qla_target(%d): task abort (s_id=%x:%x:%x, "
1200             "tag=%d, param=%x)\n", vha->vp_idx, abts->fcp_hdr_le.s_id[2],
1201             abts->fcp_hdr_le.s_id[1], abts->fcp_hdr_le.s_id[0], tag,
1202             le32_to_cpu(abts->fcp_hdr_le.parameter));
1203
1204         s_id[0] = abts->fcp_hdr_le.s_id[2];
1205         s_id[1] = abts->fcp_hdr_le.s_id[1];
1206         s_id[2] = abts->fcp_hdr_le.s_id[0];
1207
1208         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
1209         if (!sess) {
1210                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf012,
1211                     "qla_target(%d): task abort for non-existant session\n",
1212                     vha->vp_idx);
1213                 rc = qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
1214                     QLA_TGT_SESS_WORK_ABORT, abts, sizeof(*abts));
1215                 if (rc != 0) {
1216                         qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED,
1217                             false);
1218                 }
1219                 return;
1220         }
1221
1222         rc = __qlt_24xx_handle_abts(vha, abts, sess);
1223         if (rc != 0) {
1224                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf054,
1225                     "qla_target(%d): __qlt_24xx_handle_abts() failed: %d\n",
1226                     vha->vp_idx, rc);
1227                 qlt_24xx_send_abts_resp(vha, abts, FCP_TMF_REJECTED, false);
1228                 return;
1229         }
1230 }
1231
1232 /*
1233  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1234  */
1235 static void qlt_24xx_send_task_mgmt_ctio(struct scsi_qla_host *ha,
1236         struct qla_tgt_mgmt_cmd *mcmd, uint32_t resp_code)
1237 {
1238         struct atio_from_isp *atio = &mcmd->orig_iocb.atio;
1239         struct ctio7_to_24xx *ctio;
1240
1241         ql_dbg(ql_dbg_tgt, ha, 0xe008,
1242             "Sending task mgmt CTIO7 (ha=%p, atio=%p, resp_code=%x\n",
1243             ha, atio, resp_code);
1244
1245         /* Send marker if required */
1246         if (qlt_issue_marker(ha, 1) != QLA_SUCCESS)
1247                 return;
1248
1249         ctio = (struct ctio7_to_24xx *)qla2x00_alloc_iocbs(ha, NULL);
1250         if (ctio == NULL) {
1251                 ql_dbg(ql_dbg_tgt, ha, 0xe04c,
1252                     "qla_target(%d): %s failed: unable to allocate "
1253                     "request packet\n", ha->vp_idx, __func__);
1254                 return;
1255         }
1256
1257         ctio->entry_type = CTIO_TYPE7;
1258         ctio->entry_count = 1;
1259         ctio->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
1260         ctio->nport_handle = mcmd->sess->loop_id;
1261         ctio->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1262         ctio->vp_index = ha->vp_idx;
1263         ctio->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1264         ctio->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1265         ctio->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1266         ctio->exchange_addr = atio->u.isp24.exchange_addr;
1267         ctio->u.status1.flags = (atio->u.isp24.attr << 9) |
1268             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
1269                 CTIO7_FLAGS_SEND_STATUS);
1270         ctio->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1271         ctio->u.status1.scsi_status =
1272             __constant_cpu_to_le16(SS_RESPONSE_INFO_LEN_VALID);
1273         ctio->u.status1.response_len = __constant_cpu_to_le16(8);
1274         ctio->u.status1.sense_data[0] = resp_code;
1275
1276         qla2x00_start_iocbs(ha, ha->req);
1277 }
1278
1279 void qlt_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
1280 {
1281         mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
1282 }
1283 EXPORT_SYMBOL(qlt_free_mcmd);
1284
1285 /* callback from target fabric module code */
1286 void qlt_xmit_tm_rsp(struct qla_tgt_mgmt_cmd *mcmd)
1287 {
1288         struct scsi_qla_host *vha = mcmd->sess->vha;
1289         struct qla_hw_data *ha = vha->hw;
1290         unsigned long flags;
1291
1292         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf013,
1293             "TM response mcmd (%p) status %#x state %#x",
1294             mcmd, mcmd->fc_tm_rsp, mcmd->flags);
1295
1296         spin_lock_irqsave(&ha->hardware_lock, flags);
1297         if (mcmd->flags == QLA24XX_MGMT_SEND_NACK)
1298                 qlt_send_notify_ack(vha, &mcmd->orig_iocb.imm_ntfy,
1299                     0, 0, 0, 0, 0, 0);
1300         else {
1301                 if (mcmd->se_cmd.se_tmr_req->function == TMR_ABORT_TASK)
1302                         qlt_24xx_send_abts_resp(vha, &mcmd->orig_iocb.abts,
1303                             mcmd->fc_tm_rsp, false);
1304                 else
1305                         qlt_24xx_send_task_mgmt_ctio(vha, mcmd,
1306                             mcmd->fc_tm_rsp);
1307         }
1308         /*
1309          * Make the callback for ->free_mcmd() to queue_work() and invoke
1310          * target_put_sess_cmd() to drop cmd_kref to 1.  The final
1311          * target_put_sess_cmd() call will be made from TFO->check_stop_free()
1312          * -> tcm_qla2xxx_check_stop_free() to release the TMR associated se_cmd
1313          * descriptor after TFO->queue_tm_rsp() -> tcm_qla2xxx_queue_tm_rsp() ->
1314          * qlt_xmit_tm_rsp() returns here..
1315          */
1316         ha->tgt.tgt_ops->free_mcmd(mcmd);
1317         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1318 }
1319 EXPORT_SYMBOL(qlt_xmit_tm_rsp);
1320
1321 /* No locks */
1322 static int qlt_pci_map_calc_cnt(struct qla_tgt_prm *prm)
1323 {
1324         struct qla_tgt_cmd *cmd = prm->cmd;
1325
1326         BUG_ON(cmd->sg_cnt == 0);
1327
1328         prm->sg = (struct scatterlist *)cmd->sg;
1329         prm->seg_cnt = pci_map_sg(prm->tgt->ha->pdev, cmd->sg,
1330             cmd->sg_cnt, cmd->dma_data_direction);
1331         if (unlikely(prm->seg_cnt == 0))
1332                 goto out_err;
1333
1334         prm->cmd->sg_mapped = 1;
1335
1336         /*
1337          * If greater than four sg entries then we need to allocate
1338          * the continuation entries
1339          */
1340         if (prm->seg_cnt > prm->tgt->datasegs_per_cmd)
1341                 prm->req_cnt += DIV_ROUND_UP(prm->seg_cnt -
1342                     prm->tgt->datasegs_per_cmd, prm->tgt->datasegs_per_cont);
1343
1344         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe009, "seg_cnt=%d, req_cnt=%d\n",
1345             prm->seg_cnt, prm->req_cnt);
1346         return 0;
1347
1348 out_err:
1349         ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe04d,
1350             "qla_target(%d): PCI mapping failed: sg_cnt=%d",
1351             0, prm->cmd->sg_cnt);
1352         return -1;
1353 }
1354
1355 static inline void qlt_unmap_sg(struct scsi_qla_host *vha,
1356         struct qla_tgt_cmd *cmd)
1357 {
1358         struct qla_hw_data *ha = vha->hw;
1359
1360         BUG_ON(!cmd->sg_mapped);
1361         pci_unmap_sg(ha->pdev, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
1362         cmd->sg_mapped = 0;
1363 }
1364
1365 static int qlt_check_reserve_free_req(struct scsi_qla_host *vha,
1366         uint32_t req_cnt)
1367 {
1368         struct qla_hw_data *ha = vha->hw;
1369         device_reg_t __iomem *reg = ha->iobase;
1370         uint32_t cnt;
1371
1372         if (vha->req->cnt < (req_cnt + 2)) {
1373                 cnt = (uint16_t)RD_REG_DWORD(&reg->isp24.req_q_out);
1374
1375                 ql_dbg(ql_dbg_tgt, vha, 0xe00a,
1376                     "Request ring circled: cnt=%d, vha->->ring_index=%d, "
1377                     "vha->req->cnt=%d, req_cnt=%d\n", cnt,
1378                     vha->req->ring_index, vha->req->cnt, req_cnt);
1379                 if  (vha->req->ring_index < cnt)
1380                         vha->req->cnt = cnt - vha->req->ring_index;
1381                 else
1382                         vha->req->cnt = vha->req->length -
1383                             (vha->req->ring_index - cnt);
1384         }
1385
1386         if (unlikely(vha->req->cnt < (req_cnt + 2))) {
1387                 ql_dbg(ql_dbg_tgt, vha, 0xe00b,
1388                     "qla_target(%d): There is no room in the "
1389                     "request ring: vha->req->ring_index=%d, vha->req->cnt=%d, "
1390                     "req_cnt=%d\n", vha->vp_idx, vha->req->ring_index,
1391                     vha->req->cnt, req_cnt);
1392                 return -EAGAIN;
1393         }
1394         vha->req->cnt -= req_cnt;
1395
1396         return 0;
1397 }
1398
1399 /*
1400  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
1401  */
1402 static inline void *qlt_get_req_pkt(struct scsi_qla_host *vha)
1403 {
1404         /* Adjust ring index. */
1405         vha->req->ring_index++;
1406         if (vha->req->ring_index == vha->req->length) {
1407                 vha->req->ring_index = 0;
1408                 vha->req->ring_ptr = vha->req->ring;
1409         } else {
1410                 vha->req->ring_ptr++;
1411         }
1412         return (cont_entry_t *)vha->req->ring_ptr;
1413 }
1414
1415 /* ha->hardware_lock supposed to be held on entry */
1416 static inline uint32_t qlt_make_handle(struct scsi_qla_host *vha)
1417 {
1418         struct qla_hw_data *ha = vha->hw;
1419         uint32_t h;
1420
1421         h = ha->tgt.current_handle;
1422         /* always increment cmd handle */
1423         do {
1424                 ++h;
1425                 if (h > DEFAULT_OUTSTANDING_COMMANDS)
1426                         h = 1; /* 0 is QLA_TGT_NULL_HANDLE */
1427                 if (h == ha->tgt.current_handle) {
1428                         ql_dbg(ql_dbg_tgt, vha, 0xe04e,
1429                             "qla_target(%d): Ran out of "
1430                             "empty cmd slots in ha %p\n", vha->vp_idx, ha);
1431                         h = QLA_TGT_NULL_HANDLE;
1432                         break;
1433                 }
1434         } while ((h == QLA_TGT_NULL_HANDLE) ||
1435             (h == QLA_TGT_SKIP_HANDLE) ||
1436             (ha->tgt.cmds[h-1] != NULL));
1437
1438         if (h != QLA_TGT_NULL_HANDLE)
1439                 ha->tgt.current_handle = h;
1440
1441         return h;
1442 }
1443
1444 /* ha->hardware_lock supposed to be held on entry */
1445 static int qlt_24xx_build_ctio_pkt(struct qla_tgt_prm *prm,
1446         struct scsi_qla_host *vha)
1447 {
1448         uint32_t h;
1449         struct ctio7_to_24xx *pkt;
1450         struct qla_hw_data *ha = vha->hw;
1451         struct atio_from_isp *atio = &prm->cmd->atio;
1452
1453         pkt = (struct ctio7_to_24xx *)vha->req->ring_ptr;
1454         prm->pkt = pkt;
1455         memset(pkt, 0, sizeof(*pkt));
1456
1457         pkt->entry_type = CTIO_TYPE7;
1458         pkt->entry_count = (uint8_t)prm->req_cnt;
1459         pkt->vp_index = vha->vp_idx;
1460
1461         h = qlt_make_handle(vha);
1462         if (unlikely(h == QLA_TGT_NULL_HANDLE)) {
1463                 /*
1464                  * CTIO type 7 from the firmware doesn't provide a way to
1465                  * know the initiator's LOOP ID, hence we can't find
1466                  * the session and, so, the command.
1467                  */
1468                 return -EAGAIN;
1469         } else
1470                 ha->tgt.cmds[h-1] = prm->cmd;
1471
1472         pkt->handle = h | CTIO_COMPLETION_HANDLE_MARK;
1473         pkt->nport_handle = prm->cmd->loop_id;
1474         pkt->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
1475         pkt->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
1476         pkt->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
1477         pkt->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
1478         pkt->exchange_addr = atio->u.isp24.exchange_addr;
1479         pkt->u.status0.flags |= (atio->u.isp24.attr << 9);
1480         pkt->u.status0.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
1481         pkt->u.status0.relative_offset = cpu_to_le32(prm->cmd->offset);
1482
1483         ql_dbg(ql_dbg_tgt, vha, 0xe00c,
1484             "qla_target(%d): handle(cmd) -> %08x, timeout %d, ox_id %#x\n",
1485             vha->vp_idx, pkt->handle, QLA_TGT_TIMEOUT,
1486             le16_to_cpu(pkt->u.status0.ox_id));
1487         return 0;
1488 }
1489
1490 /*
1491  * ha->hardware_lock supposed to be held on entry. We have already made sure
1492  * that there is sufficient amount of request entries to not drop it.
1493  */
1494 static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm,
1495         struct scsi_qla_host *vha)
1496 {
1497         int cnt;
1498         uint32_t *dword_ptr;
1499         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1500
1501         /* Build continuation packets */
1502         while (prm->seg_cnt > 0) {
1503                 cont_a64_entry_t *cont_pkt64 =
1504                         (cont_a64_entry_t *)qlt_get_req_pkt(vha);
1505
1506                 /*
1507                  * Make sure that from cont_pkt64 none of
1508                  * 64-bit specific fields used for 32-bit
1509                  * addressing. Cast to (cont_entry_t *) for
1510                  * that.
1511                  */
1512
1513                 memset(cont_pkt64, 0, sizeof(*cont_pkt64));
1514
1515                 cont_pkt64->entry_count = 1;
1516                 cont_pkt64->sys_define = 0;
1517
1518                 if (enable_64bit_addressing) {
1519                         cont_pkt64->entry_type = CONTINUE_A64_TYPE;
1520                         dword_ptr =
1521                             (uint32_t *)&cont_pkt64->dseg_0_address;
1522                 } else {
1523                         cont_pkt64->entry_type = CONTINUE_TYPE;
1524                         dword_ptr =
1525                             (uint32_t *)&((cont_entry_t *)
1526                                 cont_pkt64)->dseg_0_address;
1527                 }
1528
1529                 /* Load continuation entry data segments */
1530                 for (cnt = 0;
1531                     cnt < prm->tgt->datasegs_per_cont && prm->seg_cnt;
1532                     cnt++, prm->seg_cnt--) {
1533                         *dword_ptr++ =
1534                             cpu_to_le32(pci_dma_lo32
1535                                 (sg_dma_address(prm->sg)));
1536                         if (enable_64bit_addressing) {
1537                                 *dword_ptr++ =
1538                                     cpu_to_le32(pci_dma_hi32
1539                                         (sg_dma_address
1540                                         (prm->sg)));
1541                         }
1542                         *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1543
1544                         ql_dbg(ql_dbg_tgt, vha, 0xe00d,
1545                             "S/G Segment Cont. phys_addr=%llx:%llx, len=%d\n",
1546                             (long long unsigned int)
1547                             pci_dma_hi32(sg_dma_address(prm->sg)),
1548                             (long long unsigned int)
1549                             pci_dma_lo32(sg_dma_address(prm->sg)),
1550                             (int)sg_dma_len(prm->sg));
1551
1552                         prm->sg = sg_next(prm->sg);
1553                 }
1554         }
1555 }
1556
1557 /*
1558  * ha->hardware_lock supposed to be held on entry. We have already made sure
1559  * that there is sufficient amount of request entries to not drop it.
1560  */
1561 static void qlt_load_data_segments(struct qla_tgt_prm *prm,
1562         struct scsi_qla_host *vha)
1563 {
1564         int cnt;
1565         uint32_t *dword_ptr;
1566         int enable_64bit_addressing = prm->tgt->tgt_enable_64bit_addr;
1567         struct ctio7_to_24xx *pkt24 = (struct ctio7_to_24xx *)prm->pkt;
1568
1569         ql_dbg(ql_dbg_tgt, vha, 0xe00e,
1570             "iocb->scsi_status=%x, iocb->flags=%x\n",
1571             le16_to_cpu(pkt24->u.status0.scsi_status),
1572             le16_to_cpu(pkt24->u.status0.flags));
1573
1574         pkt24->u.status0.transfer_length = cpu_to_le32(prm->cmd->bufflen);
1575
1576         /* Setup packet address segment pointer */
1577         dword_ptr = pkt24->u.status0.dseg_0_address;
1578
1579         /* Set total data segment count */
1580         if (prm->seg_cnt)
1581                 pkt24->dseg_count = cpu_to_le16(prm->seg_cnt);
1582
1583         if (prm->seg_cnt == 0) {
1584                 /* No data transfer */
1585                 *dword_ptr++ = 0;
1586                 *dword_ptr = 0;
1587                 return;
1588         }
1589
1590         /* If scatter gather */
1591         ql_dbg(ql_dbg_tgt, vha, 0xe00f, "%s", "Building S/G data segments...");
1592
1593         /* Load command entry data segments */
1594         for (cnt = 0;
1595             (cnt < prm->tgt->datasegs_per_cmd) && prm->seg_cnt;
1596             cnt++, prm->seg_cnt--) {
1597                 *dword_ptr++ =
1598                     cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
1599                 if (enable_64bit_addressing) {
1600                         *dword_ptr++ =
1601                             cpu_to_le32(pci_dma_hi32(
1602                                 sg_dma_address(prm->sg)));
1603                 }
1604                 *dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
1605
1606                 ql_dbg(ql_dbg_tgt, vha, 0xe010,
1607                     "S/G Segment phys_addr=%llx:%llx, len=%d\n",
1608                     (long long unsigned int)pci_dma_hi32(sg_dma_address(
1609                     prm->sg)),
1610                     (long long unsigned int)pci_dma_lo32(sg_dma_address(
1611                     prm->sg)),
1612                     (int)sg_dma_len(prm->sg));
1613
1614                 prm->sg = sg_next(prm->sg);
1615         }
1616
1617         qlt_load_cont_data_segments(prm, vha);
1618 }
1619
1620 static inline int qlt_has_data(struct qla_tgt_cmd *cmd)
1621 {
1622         return cmd->bufflen > 0;
1623 }
1624
1625 /*
1626  * Called without ha->hardware_lock held
1627  */
1628 static int qlt_pre_xmit_response(struct qla_tgt_cmd *cmd,
1629         struct qla_tgt_prm *prm, int xmit_type, uint8_t scsi_status,
1630         uint32_t *full_req_cnt)
1631 {
1632         struct qla_tgt *tgt = cmd->tgt;
1633         struct scsi_qla_host *vha = tgt->vha;
1634         struct qla_hw_data *ha = vha->hw;
1635         struct se_cmd *se_cmd = &cmd->se_cmd;
1636
1637         if (unlikely(cmd->aborted)) {
1638                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf014,
1639                     "qla_target(%d): terminating exchange "
1640                     "for aborted cmd=%p (se_cmd=%p, tag=%d)", vha->vp_idx, cmd,
1641                     se_cmd, cmd->tag);
1642
1643                 cmd->state = QLA_TGT_STATE_ABORTED;
1644
1645                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 0);
1646
1647                 /* !! At this point cmd could be already freed !! */
1648                 return QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED;
1649         }
1650
1651         ql_dbg(ql_dbg_tgt, vha, 0xe011, "qla_target(%d): tag=%u\n",
1652             vha->vp_idx, cmd->tag);
1653
1654         prm->cmd = cmd;
1655         prm->tgt = tgt;
1656         prm->rq_result = scsi_status;
1657         prm->sense_buffer = &cmd->sense_buffer[0];
1658         prm->sense_buffer_len = TRANSPORT_SENSE_BUFFER;
1659         prm->sg = NULL;
1660         prm->seg_cnt = -1;
1661         prm->req_cnt = 1;
1662         prm->add_status_pkt = 0;
1663
1664         ql_dbg(ql_dbg_tgt, vha, 0xe012, "rq_result=%x, xmit_type=%x\n",
1665             prm->rq_result, xmit_type);
1666
1667         /* Send marker if required */
1668         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
1669                 return -EFAULT;
1670
1671         ql_dbg(ql_dbg_tgt, vha, 0xe013, "CTIO start: vha(%d)\n", vha->vp_idx);
1672
1673         if ((xmit_type & QLA_TGT_XMIT_DATA) && qlt_has_data(cmd)) {
1674                 if  (qlt_pci_map_calc_cnt(prm) != 0)
1675                         return -EAGAIN;
1676         }
1677
1678         *full_req_cnt = prm->req_cnt;
1679
1680         if (se_cmd->se_cmd_flags & SCF_UNDERFLOW_BIT) {
1681                 prm->residual = se_cmd->residual_count;
1682                 ql_dbg(ql_dbg_tgt, vha, 0xe014,
1683                     "Residual underflow: %d (tag %d, "
1684                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1685                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1686                     cmd->bufflen, prm->rq_result);
1687                 prm->rq_result |= SS_RESIDUAL_UNDER;
1688         } else if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
1689                 prm->residual = se_cmd->residual_count;
1690                 ql_dbg(ql_dbg_tgt, vha, 0xe015,
1691                     "Residual overflow: %d (tag %d, "
1692                     "op %x, bufflen %d, rq_result %x)\n", prm->residual,
1693                     cmd->tag, se_cmd->t_task_cdb ? se_cmd->t_task_cdb[0] : 0,
1694                     cmd->bufflen, prm->rq_result);
1695                 prm->rq_result |= SS_RESIDUAL_OVER;
1696         }
1697
1698         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1699                 /*
1700                  * If QLA_TGT_XMIT_DATA is not set, add_status_pkt will be
1701                  * ignored in *xmit_response() below
1702                  */
1703                 if (qlt_has_data(cmd)) {
1704                         if (QLA_TGT_SENSE_VALID(prm->sense_buffer) ||
1705                             (IS_FWI2_CAPABLE(ha) &&
1706                             (prm->rq_result != 0))) {
1707                                 prm->add_status_pkt = 1;
1708                                 (*full_req_cnt)++;
1709                         }
1710                 }
1711         }
1712
1713         ql_dbg(ql_dbg_tgt, vha, 0xe016,
1714             "req_cnt=%d, full_req_cnt=%d, add_status_pkt=%d\n",
1715             prm->req_cnt, *full_req_cnt, prm->add_status_pkt);
1716
1717         return 0;
1718 }
1719
1720 static inline int qlt_need_explicit_conf(struct qla_hw_data *ha,
1721         struct qla_tgt_cmd *cmd, int sending_sense)
1722 {
1723         if (ha->tgt.enable_class_2)
1724                 return 0;
1725
1726         if (sending_sense)
1727                 return cmd->conf_compl_supported;
1728         else
1729                 return ha->tgt.enable_explicit_conf &&
1730                     cmd->conf_compl_supported;
1731 }
1732
1733 #ifdef CONFIG_QLA_TGT_DEBUG_SRR
1734 /*
1735  *  Original taken from the XFS code
1736  */
1737 static unsigned long qlt_srr_random(void)
1738 {
1739         static int Inited;
1740         static unsigned long RandomValue;
1741         static DEFINE_SPINLOCK(lock);
1742         /* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
1743         register long rv;
1744         register long lo;
1745         register long hi;
1746         unsigned long flags;
1747
1748         spin_lock_irqsave(&lock, flags);
1749         if (!Inited) {
1750                 RandomValue = jiffies;
1751                 Inited = 1;
1752         }
1753         rv = RandomValue;
1754         hi = rv / 127773;
1755         lo = rv % 127773;
1756         rv = 16807 * lo - 2836 * hi;
1757         if (rv <= 0)
1758                 rv += 2147483647;
1759         RandomValue = rv;
1760         spin_unlock_irqrestore(&lock, flags);
1761         return rv;
1762 }
1763
1764 static void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1765 {
1766 #if 0 /* This is not a real status packets lost, so it won't lead to SRR */
1767         if ((*xmit_type & QLA_TGT_XMIT_STATUS) && (qlt_srr_random() % 200)
1768             == 50) {
1769                 *xmit_type &= ~QLA_TGT_XMIT_STATUS;
1770                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf015,
1771                     "Dropping cmd %p (tag %d) status", cmd, cmd->tag);
1772         }
1773 #endif
1774         /*
1775          * It's currently not possible to simulate SRRs for FCP_WRITE without
1776          * a physical link layer failure, so don't even try here..
1777          */
1778         if (cmd->dma_data_direction != DMA_FROM_DEVICE)
1779                 return;
1780
1781         if (qlt_has_data(cmd) && (cmd->sg_cnt > 1) &&
1782             ((qlt_srr_random() % 100) == 20)) {
1783                 int i, leave = 0;
1784                 unsigned int tot_len = 0;
1785
1786                 while (leave == 0)
1787                         leave = qlt_srr_random() % cmd->sg_cnt;
1788
1789                 for (i = 0; i < leave; i++)
1790                         tot_len += cmd->sg[i].length;
1791
1792                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf016,
1793                     "Cutting cmd %p (tag %d) buffer"
1794                     " tail to len %d, sg_cnt %d (cmd->bufflen %d,"
1795                     " cmd->sg_cnt %d)", cmd, cmd->tag, tot_len, leave,
1796                     cmd->bufflen, cmd->sg_cnt);
1797
1798                 cmd->bufflen = tot_len;
1799                 cmd->sg_cnt = leave;
1800         }
1801
1802         if (qlt_has_data(cmd) && ((qlt_srr_random() % 100) == 70)) {
1803                 unsigned int offset = qlt_srr_random() % cmd->bufflen;
1804
1805                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf017,
1806                     "Cutting cmd %p (tag %d) buffer head "
1807                     "to offset %d (cmd->bufflen %d)", cmd, cmd->tag, offset,
1808                     cmd->bufflen);
1809                 if (offset == 0)
1810                         *xmit_type &= ~QLA_TGT_XMIT_DATA;
1811                 else if (qlt_set_data_offset(cmd, offset)) {
1812                         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf018,
1813                             "qlt_set_data_offset() failed (tag %d)", cmd->tag);
1814                 }
1815         }
1816 }
1817 #else
1818 static inline void qlt_check_srr_debug(struct qla_tgt_cmd *cmd, int *xmit_type)
1819 {}
1820 #endif
1821
1822 static void qlt_24xx_init_ctio_to_isp(struct ctio7_to_24xx *ctio,
1823         struct qla_tgt_prm *prm)
1824 {
1825         prm->sense_buffer_len = min_t(uint32_t, prm->sense_buffer_len,
1826             (uint32_t)sizeof(ctio->u.status1.sense_data));
1827         ctio->u.status0.flags |=
1828             __constant_cpu_to_le16(CTIO7_FLAGS_SEND_STATUS);
1829         if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 0)) {
1830                 ctio->u.status0.flags |= __constant_cpu_to_le16(
1831                     CTIO7_FLAGS_EXPLICIT_CONFORM |
1832                     CTIO7_FLAGS_CONFORM_REQ);
1833         }
1834         ctio->u.status0.residual = cpu_to_le32(prm->residual);
1835         ctio->u.status0.scsi_status = cpu_to_le16(prm->rq_result);
1836         if (QLA_TGT_SENSE_VALID(prm->sense_buffer)) {
1837                 int i;
1838
1839                 if (qlt_need_explicit_conf(prm->tgt->ha, prm->cmd, 1)) {
1840                         if (prm->cmd->se_cmd.scsi_status != 0) {
1841                                 ql_dbg(ql_dbg_tgt, prm->cmd->vha, 0xe017,
1842                                     "Skipping EXPLICIT_CONFORM and "
1843                                     "CTIO7_FLAGS_CONFORM_REQ for FCP READ w/ "
1844                                     "non GOOD status\n");
1845                                 goto skip_explict_conf;
1846                         }
1847                         ctio->u.status1.flags |= __constant_cpu_to_le16(
1848                             CTIO7_FLAGS_EXPLICIT_CONFORM |
1849                             CTIO7_FLAGS_CONFORM_REQ);
1850                 }
1851 skip_explict_conf:
1852                 ctio->u.status1.flags &=
1853                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1854                 ctio->u.status1.flags |=
1855                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1856                 ctio->u.status1.scsi_status |=
1857                     __constant_cpu_to_le16(SS_SENSE_LEN_VALID);
1858                 ctio->u.status1.sense_length =
1859                     cpu_to_le16(prm->sense_buffer_len);
1860                 for (i = 0; i < prm->sense_buffer_len/4; i++)
1861                         ((uint32_t *)ctio->u.status1.sense_data)[i] =
1862                                 cpu_to_be32(((uint32_t *)prm->sense_buffer)[i]);
1863 #if 0
1864                 if (unlikely((prm->sense_buffer_len % 4) != 0)) {
1865                         static int q;
1866                         if (q < 10) {
1867                                 ql_dbg(ql_dbg_tgt, vha, 0xe04f,
1868                                     "qla_target(%d): %d bytes of sense "
1869                                     "lost", prm->tgt->ha->vp_idx,
1870                                     prm->sense_buffer_len % 4);
1871                                 q++;
1872                         }
1873                 }
1874 #endif
1875         } else {
1876                 ctio->u.status1.flags &=
1877                     ~__constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_0);
1878                 ctio->u.status1.flags |=
1879                     __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1);
1880                 ctio->u.status1.sense_length = 0;
1881                 memset(ctio->u.status1.sense_data, 0,
1882                     sizeof(ctio->u.status1.sense_data));
1883         }
1884
1885         /* Sense with len > 24, is it possible ??? */
1886 }
1887
1888 /*
1889  * Callback to setup response of xmit_type of QLA_TGT_XMIT_DATA and *
1890  * QLA_TGT_XMIT_STATUS for >= 24xx silicon
1891  */
1892 int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type,
1893         uint8_t scsi_status)
1894 {
1895         struct scsi_qla_host *vha = cmd->vha;
1896         struct qla_hw_data *ha = vha->hw;
1897         struct ctio7_to_24xx *pkt;
1898         struct qla_tgt_prm prm;
1899         uint32_t full_req_cnt = 0;
1900         unsigned long flags = 0;
1901         int res;
1902
1903         memset(&prm, 0, sizeof(prm));
1904         qlt_check_srr_debug(cmd, &xmit_type);
1905
1906         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe018,
1907             "is_send_status=%d, cmd->bufflen=%d, cmd->sg_cnt=%d, "
1908             "cmd->dma_data_direction=%d\n", (xmit_type & QLA_TGT_XMIT_STATUS) ?
1909             1 : 0, cmd->bufflen, cmd->sg_cnt, cmd->dma_data_direction);
1910
1911         res = qlt_pre_xmit_response(cmd, &prm, xmit_type, scsi_status,
1912             &full_req_cnt);
1913         if (unlikely(res != 0)) {
1914                 if (res == QLA_TGT_PRE_XMIT_RESP_CMD_ABORTED)
1915                         return 0;
1916
1917                 return res;
1918         }
1919
1920         spin_lock_irqsave(&ha->hardware_lock, flags);
1921
1922         /* Does F/W have an IOCBs for this request */
1923         res = qlt_check_reserve_free_req(vha, full_req_cnt);
1924         if (unlikely(res))
1925                 goto out_unmap_unlock;
1926
1927         res = qlt_24xx_build_ctio_pkt(&prm, vha);
1928         if (unlikely(res != 0))
1929                 goto out_unmap_unlock;
1930
1931
1932         pkt = (struct ctio7_to_24xx *)prm.pkt;
1933
1934         if (qlt_has_data(cmd) && (xmit_type & QLA_TGT_XMIT_DATA)) {
1935                 pkt->u.status0.flags |=
1936                     __constant_cpu_to_le16(CTIO7_FLAGS_DATA_IN |
1937                         CTIO7_FLAGS_STATUS_MODE_0);
1938
1939                 qlt_load_data_segments(&prm, vha);
1940
1941                 if (prm.add_status_pkt == 0) {
1942                         if (xmit_type & QLA_TGT_XMIT_STATUS) {
1943                                 pkt->u.status0.scsi_status =
1944                                     cpu_to_le16(prm.rq_result);
1945                                 pkt->u.status0.residual =
1946                                     cpu_to_le32(prm.residual);
1947                                 pkt->u.status0.flags |= __constant_cpu_to_le16(
1948                                     CTIO7_FLAGS_SEND_STATUS);
1949                                 if (qlt_need_explicit_conf(ha, cmd, 0)) {
1950                                         pkt->u.status0.flags |=
1951                                             __constant_cpu_to_le16(
1952                                                 CTIO7_FLAGS_EXPLICIT_CONFORM |
1953                                                 CTIO7_FLAGS_CONFORM_REQ);
1954                                 }
1955                         }
1956
1957                 } else {
1958                         /*
1959                          * We have already made sure that there is sufficient
1960                          * amount of request entries to not drop HW lock in
1961                          * req_pkt().
1962                          */
1963                         struct ctio7_to_24xx *ctio =
1964                                 (struct ctio7_to_24xx *)qlt_get_req_pkt(vha);
1965
1966                         ql_dbg(ql_dbg_tgt, vha, 0xe019,
1967                             "Building additional status packet\n");
1968
1969                         memcpy(ctio, pkt, sizeof(*ctio));
1970                         ctio->entry_count = 1;
1971                         ctio->dseg_count = 0;
1972                         ctio->u.status1.flags &= ~__constant_cpu_to_le16(
1973                             CTIO7_FLAGS_DATA_IN);
1974
1975                         /* Real finish is ctio_m1's finish */
1976                         pkt->handle |= CTIO_INTERMEDIATE_HANDLE_MARK;
1977                         pkt->u.status0.flags |= __constant_cpu_to_le16(
1978                             CTIO7_FLAGS_DONT_RET_CTIO);
1979                         qlt_24xx_init_ctio_to_isp((struct ctio7_to_24xx *)ctio,
1980                             &prm);
1981                         pr_debug("Status CTIO7: %p\n", ctio);
1982                 }
1983         } else
1984                 qlt_24xx_init_ctio_to_isp(pkt, &prm);
1985
1986
1987         cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */
1988
1989         ql_dbg(ql_dbg_tgt, vha, 0xe01a,
1990             "Xmitting CTIO7 response pkt for 24xx: %p scsi_status: 0x%02x\n",
1991             pkt, scsi_status);
1992
1993         qla2x00_start_iocbs(vha, vha->req);
1994         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1995
1996         return 0;
1997
1998 out_unmap_unlock:
1999         if (cmd->sg_mapped)
2000                 qlt_unmap_sg(vha, cmd);
2001         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2002
2003         return res;
2004 }
2005 EXPORT_SYMBOL(qlt_xmit_response);
2006
2007 int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd)
2008 {
2009         struct ctio7_to_24xx *pkt;
2010         struct scsi_qla_host *vha = cmd->vha;
2011         struct qla_hw_data *ha = vha->hw;
2012         struct qla_tgt *tgt = cmd->tgt;
2013         struct qla_tgt_prm prm;
2014         unsigned long flags;
2015         int res = 0;
2016
2017         memset(&prm, 0, sizeof(prm));
2018         prm.cmd = cmd;
2019         prm.tgt = tgt;
2020         prm.sg = NULL;
2021         prm.req_cnt = 1;
2022
2023         /* Send marker if required */
2024         if (qlt_issue_marker(vha, 0) != QLA_SUCCESS)
2025                 return -EIO;
2026
2027         ql_dbg(ql_dbg_tgt, vha, 0xe01b, "CTIO_start: vha(%d)",
2028             (int)vha->vp_idx);
2029
2030         /* Calculate number of entries and segments required */
2031         if (qlt_pci_map_calc_cnt(&prm) != 0)
2032                 return -EAGAIN;
2033
2034         spin_lock_irqsave(&ha->hardware_lock, flags);
2035
2036         /* Does F/W have an IOCBs for this request */
2037         res = qlt_check_reserve_free_req(vha, prm.req_cnt);
2038         if (res != 0)
2039                 goto out_unlock_free_unmap;
2040
2041         res = qlt_24xx_build_ctio_pkt(&prm, vha);
2042         if (unlikely(res != 0))
2043                 goto out_unlock_free_unmap;
2044         pkt = (struct ctio7_to_24xx *)prm.pkt;
2045         pkt->u.status0.flags |= __constant_cpu_to_le16(CTIO7_FLAGS_DATA_OUT |
2046             CTIO7_FLAGS_STATUS_MODE_0);
2047         qlt_load_data_segments(&prm, vha);
2048
2049         cmd->state = QLA_TGT_STATE_NEED_DATA;
2050
2051         qla2x00_start_iocbs(vha, vha->req);
2052         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2053
2054         return res;
2055
2056 out_unlock_free_unmap:
2057         if (cmd->sg_mapped)
2058                 qlt_unmap_sg(vha, cmd);
2059         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2060
2061         return res;
2062 }
2063 EXPORT_SYMBOL(qlt_rdy_to_xfer);
2064
2065 /* If hardware_lock held on entry, might drop it, then reaquire */
2066 /* This function sends the appropriate CTIO to ISP 2xxx or 24xx */
2067 static int __qlt_send_term_exchange(struct scsi_qla_host *vha,
2068         struct qla_tgt_cmd *cmd,
2069         struct atio_from_isp *atio)
2070 {
2071         struct ctio7_to_24xx *ctio24;
2072         struct qla_hw_data *ha = vha->hw;
2073         request_t *pkt;
2074         int ret = 0;
2075
2076         ql_dbg(ql_dbg_tgt, vha, 0xe01c, "Sending TERM EXCH CTIO (ha=%p)\n", ha);
2077
2078         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
2079         if (pkt == NULL) {
2080                 ql_dbg(ql_dbg_tgt, vha, 0xe050,
2081                     "qla_target(%d): %s failed: unable to allocate "
2082                     "request packet\n", vha->vp_idx, __func__);
2083                 return -ENOMEM;
2084         }
2085
2086         if (cmd != NULL) {
2087                 if (cmd->state < QLA_TGT_STATE_PROCESSED) {
2088                         ql_dbg(ql_dbg_tgt, vha, 0xe051,
2089                             "qla_target(%d): Terminating cmd %p with "
2090                             "incorrect state %d\n", vha->vp_idx, cmd,
2091                             cmd->state);
2092                 } else
2093                         ret = 1;
2094         }
2095
2096         pkt->entry_count = 1;
2097         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
2098
2099         ctio24 = (struct ctio7_to_24xx *)pkt;
2100         ctio24->entry_type = CTIO_TYPE7;
2101         ctio24->nport_handle = cmd ? cmd->loop_id : CTIO7_NHANDLE_UNRECOGNIZED;
2102         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
2103         ctio24->vp_index = vha->vp_idx;
2104         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
2105         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
2106         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
2107         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
2108         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
2109             __constant_cpu_to_le16(CTIO7_FLAGS_STATUS_MODE_1 |
2110                 CTIO7_FLAGS_TERMINATE);
2111         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
2112
2113         /* Most likely, it isn't needed */
2114         ctio24->u.status1.residual = get_unaligned((uint32_t *)
2115             &atio->u.isp24.fcp_cmnd.add_cdb[
2116             atio->u.isp24.fcp_cmnd.add_cdb_len]);
2117         if (ctio24->u.status1.residual != 0)
2118                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
2119
2120         qla2x00_start_iocbs(vha, vha->req);
2121         return ret;
2122 }
2123
2124 static void qlt_send_term_exchange(struct scsi_qla_host *vha,
2125         struct qla_tgt_cmd *cmd, struct atio_from_isp *atio, int ha_locked)
2126 {
2127         unsigned long flags;
2128         int rc;
2129
2130         if (qlt_issue_marker(vha, ha_locked) < 0)
2131                 return;
2132
2133         if (ha_locked) {
2134                 rc = __qlt_send_term_exchange(vha, cmd, atio);
2135                 goto done;
2136         }
2137         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
2138         rc = __qlt_send_term_exchange(vha, cmd, atio);
2139         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
2140 done:
2141         if (rc == 1) {
2142                 if (!ha_locked && !in_interrupt())
2143                         msleep(250); /* just in case */
2144
2145                 vha->hw->tgt.tgt_ops->free_cmd(cmd);
2146         }
2147 }
2148
2149 void qlt_free_cmd(struct qla_tgt_cmd *cmd)
2150 {
2151         BUG_ON(cmd->sg_mapped);
2152
2153         if (unlikely(cmd->free_sg))
2154                 kfree(cmd->sg);
2155         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2156 }
2157 EXPORT_SYMBOL(qlt_free_cmd);
2158
2159 /* ha->hardware_lock supposed to be held on entry */
2160 static int qlt_prepare_srr_ctio(struct scsi_qla_host *vha,
2161         struct qla_tgt_cmd *cmd, void *ctio)
2162 {
2163         struct qla_tgt_srr_ctio *sc;
2164         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2165         struct qla_tgt_srr_imm *imm;
2166
2167         tgt->ctio_srr_id++;
2168
2169         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf019,
2170             "qla_target(%d): CTIO with SRR status received\n", vha->vp_idx);
2171
2172         if (!ctio) {
2173                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf055,
2174                     "qla_target(%d): SRR CTIO, but ctio is NULL\n",
2175                     vha->vp_idx);
2176                 return -EINVAL;
2177         }
2178
2179         sc = kzalloc(sizeof(*sc), GFP_ATOMIC);
2180         if (sc != NULL) {
2181                 sc->cmd = cmd;
2182                 /* IRQ is already OFF */
2183                 spin_lock(&tgt->srr_lock);
2184                 sc->srr_id = tgt->ctio_srr_id;
2185                 list_add_tail(&sc->srr_list_entry,
2186                     &tgt->srr_ctio_list);
2187                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01a,
2188                     "CTIO SRR %p added (id %d)\n", sc, sc->srr_id);
2189                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
2190                         int found = 0;
2191                         list_for_each_entry(imm, &tgt->srr_imm_list,
2192                             srr_list_entry) {
2193                                 if (imm->srr_id == sc->srr_id) {
2194                                         found = 1;
2195                                         break;
2196                                 }
2197                         }
2198                         if (found) {
2199                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01b,
2200                                     "Scheduling srr work\n");
2201                                 schedule_work(&tgt->srr_work);
2202                         } else {
2203                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf056,
2204                                     "qla_target(%d): imm_srr_id "
2205                                     "== ctio_srr_id (%d), but there is no "
2206                                     "corresponding SRR IMM, deleting CTIO "
2207                                     "SRR %p\n", vha->vp_idx,
2208                                     tgt->ctio_srr_id, sc);
2209                                 list_del(&sc->srr_list_entry);
2210                                 spin_unlock(&tgt->srr_lock);
2211
2212                                 kfree(sc);
2213                                 return -EINVAL;
2214                         }
2215                 }
2216                 spin_unlock(&tgt->srr_lock);
2217         } else {
2218                 struct qla_tgt_srr_imm *ti;
2219
2220                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf057,
2221                     "qla_target(%d): Unable to allocate SRR CTIO entry\n",
2222                     vha->vp_idx);
2223                 spin_lock(&tgt->srr_lock);
2224                 list_for_each_entry_safe(imm, ti, &tgt->srr_imm_list,
2225                     srr_list_entry) {
2226                         if (imm->srr_id == tgt->ctio_srr_id) {
2227                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01c,
2228                                     "IMM SRR %p deleted (id %d)\n",
2229                                     imm, imm->srr_id);
2230                                 list_del(&imm->srr_list_entry);
2231                                 qlt_reject_free_srr_imm(vha, imm, 1);
2232                         }
2233                 }
2234                 spin_unlock(&tgt->srr_lock);
2235
2236                 return -ENOMEM;
2237         }
2238
2239         return 0;
2240 }
2241
2242 /*
2243  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2244  */
2245 static int qlt_term_ctio_exchange(struct scsi_qla_host *vha, void *ctio,
2246         struct qla_tgt_cmd *cmd, uint32_t status)
2247 {
2248         int term = 0;
2249
2250         if (ctio != NULL) {
2251                 struct ctio7_from_24xx *c = (struct ctio7_from_24xx *)ctio;
2252                 term = !(c->flags &
2253                     __constant_cpu_to_le16(OF_TERM_EXCH));
2254         } else
2255                 term = 1;
2256
2257         if (term)
2258                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
2259
2260         return term;
2261 }
2262
2263 /* ha->hardware_lock supposed to be held on entry */
2264 static inline struct qla_tgt_cmd *qlt_get_cmd(struct scsi_qla_host *vha,
2265         uint32_t handle)
2266 {
2267         struct qla_hw_data *ha = vha->hw;
2268
2269         handle--;
2270         if (ha->tgt.cmds[handle] != NULL) {
2271                 struct qla_tgt_cmd *cmd = ha->tgt.cmds[handle];
2272                 ha->tgt.cmds[handle] = NULL;
2273                 return cmd;
2274         } else
2275                 return NULL;
2276 }
2277
2278 /* ha->hardware_lock supposed to be held on entry */
2279 static struct qla_tgt_cmd *qlt_ctio_to_cmd(struct scsi_qla_host *vha,
2280         uint32_t handle, void *ctio)
2281 {
2282         struct qla_tgt_cmd *cmd = NULL;
2283
2284         /* Clear out internal marks */
2285         handle &= ~(CTIO_COMPLETION_HANDLE_MARK |
2286             CTIO_INTERMEDIATE_HANDLE_MARK);
2287
2288         if (handle != QLA_TGT_NULL_HANDLE) {
2289                 if (unlikely(handle == QLA_TGT_SKIP_HANDLE)) {
2290                         ql_dbg(ql_dbg_tgt, vha, 0xe01d, "%s",
2291                             "SKIP_HANDLE CTIO\n");
2292                         return NULL;
2293                 }
2294                 /* handle-1 is actually used */
2295                 if (unlikely(handle > DEFAULT_OUTSTANDING_COMMANDS)) {
2296                         ql_dbg(ql_dbg_tgt, vha, 0xe052,
2297                             "qla_target(%d): Wrong handle %x received\n",
2298                             vha->vp_idx, handle);
2299                         return NULL;
2300                 }
2301                 cmd = qlt_get_cmd(vha, handle);
2302                 if (unlikely(cmd == NULL)) {
2303                         ql_dbg(ql_dbg_tgt, vha, 0xe053,
2304                             "qla_target(%d): Suspicious: unable to "
2305                             "find the command with handle %x\n", vha->vp_idx,
2306                             handle);
2307                         return NULL;
2308                 }
2309         } else if (ctio != NULL) {
2310                 /* We can't get loop ID from CTIO7 */
2311                 ql_dbg(ql_dbg_tgt, vha, 0xe054,
2312                     "qla_target(%d): Wrong CTIO received: QLA24xx doesn't "
2313                     "support NULL handles\n", vha->vp_idx);
2314                 return NULL;
2315         }
2316
2317         return cmd;
2318 }
2319
2320 /*
2321  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2322  */
2323 static void qlt_do_ctio_completion(struct scsi_qla_host *vha, uint32_t handle,
2324         uint32_t status, void *ctio)
2325 {
2326         struct qla_hw_data *ha = vha->hw;
2327         struct se_cmd *se_cmd;
2328         struct target_core_fabric_ops *tfo;
2329         struct qla_tgt_cmd *cmd;
2330
2331         ql_dbg(ql_dbg_tgt, vha, 0xe01e,
2332             "qla_target(%d): handle(ctio %p status %#x) <- %08x\n",
2333             vha->vp_idx, ctio, status, handle);
2334
2335         if (handle & CTIO_INTERMEDIATE_HANDLE_MARK) {
2336                 /* That could happen only in case of an error/reset/abort */
2337                 if (status != CTIO_SUCCESS) {
2338                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01d,
2339                             "Intermediate CTIO received"
2340                             " (status %x)\n", status);
2341                 }
2342                 return;
2343         }
2344
2345         cmd = qlt_ctio_to_cmd(vha, handle, ctio);
2346         if (cmd == NULL)
2347                 return;
2348
2349         se_cmd = &cmd->se_cmd;
2350         tfo = se_cmd->se_tfo;
2351
2352         if (cmd->sg_mapped)
2353                 qlt_unmap_sg(vha, cmd);
2354
2355         if (unlikely(status != CTIO_SUCCESS)) {
2356                 switch (status & 0xFFFF) {
2357                 case CTIO_LIP_RESET:
2358                 case CTIO_TARGET_RESET:
2359                 case CTIO_ABORTED:
2360                 case CTIO_TIMEOUT:
2361                 case CTIO_INVALID_RX_ID:
2362                         /* They are OK */
2363                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf058,
2364                             "qla_target(%d): CTIO with "
2365                             "status %#x received, state %x, se_cmd %p, "
2366                             "(LIP_RESET=e, ABORTED=2, TARGET_RESET=17, "
2367                             "TIMEOUT=b, INVALID_RX_ID=8)\n", vha->vp_idx,
2368                             status, cmd->state, se_cmd);
2369                         break;
2370
2371                 case CTIO_PORT_LOGGED_OUT:
2372                 case CTIO_PORT_UNAVAILABLE:
2373                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf059,
2374                             "qla_target(%d): CTIO with PORT LOGGED "
2375                             "OUT (29) or PORT UNAVAILABLE (28) status %x "
2376                             "received (state %x, se_cmd %p)\n", vha->vp_idx,
2377                             status, cmd->state, se_cmd);
2378                         break;
2379
2380                 case CTIO_SRR_RECEIVED:
2381                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05a,
2382                             "qla_target(%d): CTIO with SRR_RECEIVED"
2383                             " status %x received (state %x, se_cmd %p)\n",
2384                             vha->vp_idx, status, cmd->state, se_cmd);
2385                         if (qlt_prepare_srr_ctio(vha, cmd, ctio) != 0)
2386                                 break;
2387                         else
2388                                 return;
2389
2390                 default:
2391                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05b,
2392                             "qla_target(%d): CTIO with error status "
2393                             "0x%x received (state %x, se_cmd %p\n",
2394                             vha->vp_idx, status, cmd->state, se_cmd);
2395                         break;
2396                 }
2397
2398                 if (cmd->state != QLA_TGT_STATE_NEED_DATA)
2399                         if (qlt_term_ctio_exchange(vha, ctio, cmd, status))
2400                                 return;
2401         }
2402
2403         if (cmd->state == QLA_TGT_STATE_PROCESSED) {
2404                 ql_dbg(ql_dbg_tgt, vha, 0xe01f, "Command %p finished\n", cmd);
2405         } else if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
2406                 int rx_status = 0;
2407
2408                 cmd->state = QLA_TGT_STATE_DATA_IN;
2409
2410                 if (unlikely(status != CTIO_SUCCESS))
2411                         rx_status = -EIO;
2412                 else
2413                         cmd->write_data_transferred = 1;
2414
2415                 ql_dbg(ql_dbg_tgt, vha, 0xe020,
2416                     "Data received, context %x, rx_status %d\n",
2417                     0x0, rx_status);
2418
2419                 ha->tgt.tgt_ops->handle_data(cmd);
2420                 return;
2421         } else if (cmd->state == QLA_TGT_STATE_ABORTED) {
2422                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01e,
2423                     "Aborted command %p (tag %d) finished\n", cmd, cmd->tag);
2424         } else {
2425                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05c,
2426                     "qla_target(%d): A command in state (%d) should "
2427                     "not return a CTIO complete\n", vha->vp_idx, cmd->state);
2428         }
2429
2430         if (unlikely(status != CTIO_SUCCESS)) {
2431                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf01f, "Finishing failed CTIO\n");
2432                 dump_stack();
2433         }
2434
2435         ha->tgt.tgt_ops->free_cmd(cmd);
2436 }
2437
2438 static inline int qlt_get_fcp_task_attr(struct scsi_qla_host *vha,
2439         uint8_t task_codes)
2440 {
2441         int fcp_task_attr;
2442
2443         switch (task_codes) {
2444         case ATIO_SIMPLE_QUEUE:
2445                 fcp_task_attr = MSG_SIMPLE_TAG;
2446                 break;
2447         case ATIO_HEAD_OF_QUEUE:
2448                 fcp_task_attr = MSG_HEAD_TAG;
2449                 break;
2450         case ATIO_ORDERED_QUEUE:
2451                 fcp_task_attr = MSG_ORDERED_TAG;
2452                 break;
2453         case ATIO_ACA_QUEUE:
2454                 fcp_task_attr = MSG_ACA_TAG;
2455                 break;
2456         case ATIO_UNTAGGED:
2457                 fcp_task_attr = MSG_SIMPLE_TAG;
2458                 break;
2459         default:
2460                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05d,
2461                     "qla_target: unknown task code %x, use ORDERED instead\n",
2462                     task_codes);
2463                 fcp_task_attr = MSG_ORDERED_TAG;
2464                 break;
2465         }
2466
2467         return fcp_task_attr;
2468 }
2469
2470 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *,
2471                                         uint8_t *);
2472 /*
2473  * Process context for I/O path into tcm_qla2xxx code
2474  */
2475 static void qlt_do_work(struct work_struct *work)
2476 {
2477         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
2478         scsi_qla_host_t *vha = cmd->vha;
2479         struct qla_hw_data *ha = vha->hw;
2480         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2481         struct qla_tgt_sess *sess = NULL;
2482         struct atio_from_isp *atio = &cmd->atio;
2483         unsigned char *cdb;
2484         unsigned long flags;
2485         uint32_t data_length;
2486         int ret, fcp_task_attr, data_dir, bidi = 0;
2487
2488         if (tgt->tgt_stop)
2489                 goto out_term;
2490
2491         spin_lock_irqsave(&ha->hardware_lock, flags);
2492         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2493             atio->u.isp24.fcp_hdr.s_id);
2494         /* Do kref_get() before dropping qla_hw_data->hardware_lock. */
2495         if (sess)
2496                 kref_get(&sess->se_sess->sess_kref);
2497         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2498
2499         if (unlikely(!sess)) {
2500                 uint8_t *s_id = atio->u.isp24.fcp_hdr.s_id;
2501
2502                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf022,
2503                         "qla_target(%d): Unable to find wwn login"
2504                         " (s_id %x:%x:%x), trying to create it manually\n",
2505                         vha->vp_idx, s_id[0], s_id[1], s_id[2]);
2506
2507                 if (atio->u.raw.entry_count > 1) {
2508                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf023,
2509                                 "Dropping multy entry cmd %p\n", cmd);
2510                         goto out_term;
2511                 }
2512
2513                 mutex_lock(&vha->vha_tgt.tgt_mutex);
2514                 sess = qlt_make_local_sess(vha, s_id);
2515                 /* sess has an extra creation ref. */
2516                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
2517
2518                 if (!sess)
2519                         goto out_term;
2520         }
2521
2522         cmd->sess = sess;
2523         cmd->loop_id = sess->loop_id;
2524         cmd->conf_compl_supported = sess->conf_compl_supported;
2525
2526         cdb = &atio->u.isp24.fcp_cmnd.cdb[0];
2527         cmd->tag = atio->u.isp24.exchange_addr;
2528         cmd->unpacked_lun = scsilun_to_int(
2529             (struct scsi_lun *)&atio->u.isp24.fcp_cmnd.lun);
2530
2531         if (atio->u.isp24.fcp_cmnd.rddata &&
2532             atio->u.isp24.fcp_cmnd.wrdata) {
2533                 bidi = 1;
2534                 data_dir = DMA_TO_DEVICE;
2535         } else if (atio->u.isp24.fcp_cmnd.rddata)
2536                 data_dir = DMA_FROM_DEVICE;
2537         else if (atio->u.isp24.fcp_cmnd.wrdata)
2538                 data_dir = DMA_TO_DEVICE;
2539         else
2540                 data_dir = DMA_NONE;
2541
2542         fcp_task_attr = qlt_get_fcp_task_attr(vha,
2543             atio->u.isp24.fcp_cmnd.task_attr);
2544         data_length = be32_to_cpu(get_unaligned((uint32_t *)
2545             &atio->u.isp24.fcp_cmnd.add_cdb[
2546             atio->u.isp24.fcp_cmnd.add_cdb_len]));
2547
2548         ql_dbg(ql_dbg_tgt, vha, 0xe022,
2549             "qla_target: START qla command: %p lun: 0x%04x (tag %d)\n",
2550             cmd, cmd->unpacked_lun, cmd->tag);
2551
2552         ret = vha->hw->tgt.tgt_ops->handle_cmd(vha, cmd, cdb, data_length,
2553             fcp_task_attr, data_dir, bidi);
2554         if (ret != 0)
2555                 goto out_term;
2556         /*
2557          * Drop extra session reference from qla_tgt_handle_cmd_for_atio*(
2558          */
2559         spin_lock_irqsave(&ha->hardware_lock, flags);
2560         ha->tgt.tgt_ops->put_sess(sess);
2561         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2562         return;
2563
2564 out_term:
2565         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf020, "Terminating work cmd %p", cmd);
2566         /*
2567          * cmd has not sent to target yet, so pass NULL as the second
2568          * argument to qlt_send_term_exchange() and free the memory here.
2569          */
2570         spin_lock_irqsave(&ha->hardware_lock, flags);
2571         qlt_send_term_exchange(vha, NULL, &cmd->atio, 1);
2572         kmem_cache_free(qla_tgt_cmd_cachep, cmd);
2573         if (sess)
2574                 ha->tgt.tgt_ops->put_sess(sess);
2575         spin_unlock_irqrestore(&ha->hardware_lock, flags);
2576 }
2577
2578 /* ha->hardware_lock supposed to be held on entry */
2579 static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha,
2580         struct atio_from_isp *atio)
2581 {
2582         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2583         struct qla_tgt_cmd *cmd;
2584
2585         if (unlikely(tgt->tgt_stop)) {
2586                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf021,
2587                     "New command while device %p is shutting down\n", tgt);
2588                 return -EFAULT;
2589         }
2590
2591         cmd = kmem_cache_zalloc(qla_tgt_cmd_cachep, GFP_ATOMIC);
2592         if (!cmd) {
2593                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05e,
2594                     "qla_target(%d): Allocation of cmd failed\n", vha->vp_idx);
2595                 return -ENOMEM;
2596         }
2597
2598         memcpy(&cmd->atio, atio, sizeof(*atio));
2599         cmd->state = QLA_TGT_STATE_NEW;
2600         cmd->tgt = vha->vha_tgt.qla_tgt;
2601         cmd->vha = vha;
2602
2603         INIT_WORK(&cmd->work, qlt_do_work);
2604         queue_work(qla_tgt_wq, &cmd->work);
2605         return 0;
2606
2607 }
2608
2609 /* ha->hardware_lock supposed to be held on entry */
2610 static int qlt_issue_task_mgmt(struct qla_tgt_sess *sess, uint32_t lun,
2611         int fn, void *iocb, int flags)
2612 {
2613         struct scsi_qla_host *vha = sess->vha;
2614         struct qla_hw_data *ha = vha->hw;
2615         struct qla_tgt_mgmt_cmd *mcmd;
2616         int res;
2617         uint8_t tmr_func;
2618
2619         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2620         if (!mcmd) {
2621                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10009,
2622                     "qla_target(%d): Allocation of management "
2623                     "command failed, some commands and their data could "
2624                     "leak\n", vha->vp_idx);
2625                 return -ENOMEM;
2626         }
2627         memset(mcmd, 0, sizeof(*mcmd));
2628         mcmd->sess = sess;
2629
2630         if (iocb) {
2631                 memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2632                     sizeof(mcmd->orig_iocb.imm_ntfy));
2633         }
2634         mcmd->tmr_func = fn;
2635         mcmd->flags = flags;
2636
2637         switch (fn) {
2638         case QLA_TGT_CLEAR_ACA:
2639                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10000,
2640                     "qla_target(%d): CLEAR_ACA received\n", sess->vha->vp_idx);
2641                 tmr_func = TMR_CLEAR_ACA;
2642                 break;
2643
2644         case QLA_TGT_TARGET_RESET:
2645                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10001,
2646                     "qla_target(%d): TARGET_RESET received\n",
2647                     sess->vha->vp_idx);
2648                 tmr_func = TMR_TARGET_WARM_RESET;
2649                 break;
2650
2651         case QLA_TGT_LUN_RESET:
2652                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10002,
2653                     "qla_target(%d): LUN_RESET received\n", sess->vha->vp_idx);
2654                 tmr_func = TMR_LUN_RESET;
2655                 break;
2656
2657         case QLA_TGT_CLEAR_TS:
2658                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10003,
2659                     "qla_target(%d): CLEAR_TS received\n", sess->vha->vp_idx);
2660                 tmr_func = TMR_CLEAR_TASK_SET;
2661                 break;
2662
2663         case QLA_TGT_ABORT_TS:
2664                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10004,
2665                     "qla_target(%d): ABORT_TS received\n", sess->vha->vp_idx);
2666                 tmr_func = TMR_ABORT_TASK_SET;
2667                 break;
2668 #if 0
2669         case QLA_TGT_ABORT_ALL:
2670                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10005,
2671                     "qla_target(%d): Doing ABORT_ALL_TASKS\n",
2672                     sess->vha->vp_idx);
2673                 tmr_func = 0;
2674                 break;
2675
2676         case QLA_TGT_ABORT_ALL_SESS:
2677                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10006,
2678                     "qla_target(%d): Doing ABORT_ALL_TASKS_SESS\n",
2679                     sess->vha->vp_idx);
2680                 tmr_func = 0;
2681                 break;
2682
2683         case QLA_TGT_NEXUS_LOSS_SESS:
2684                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10007,
2685                     "qla_target(%d): Doing NEXUS_LOSS_SESS\n",
2686                     sess->vha->vp_idx);
2687                 tmr_func = 0;
2688                 break;
2689
2690         case QLA_TGT_NEXUS_LOSS:
2691                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x10008,
2692                     "qla_target(%d): Doing NEXUS_LOSS\n", sess->vha->vp_idx);
2693                 tmr_func = 0;
2694                 break;
2695 #endif
2696         default:
2697                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000a,
2698                     "qla_target(%d): Unknown task mgmt fn 0x%x\n",
2699                     sess->vha->vp_idx, fn);
2700                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2701                 return -ENOSYS;
2702         }
2703
2704         res = ha->tgt.tgt_ops->handle_tmr(mcmd, lun, tmr_func, 0);
2705         if (res != 0) {
2706                 ql_dbg(ql_dbg_tgt_tmr, vha, 0x1000b,
2707                     "qla_target(%d): tgt.tgt_ops->handle_tmr() failed: %d\n",
2708                     sess->vha->vp_idx, res);
2709                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2710                 return -EFAULT;
2711         }
2712
2713         return 0;
2714 }
2715
2716 /* ha->hardware_lock supposed to be held on entry */
2717 static int qlt_handle_task_mgmt(struct scsi_qla_host *vha, void *iocb)
2718 {
2719         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2720         struct qla_hw_data *ha = vha->hw;
2721         struct qla_tgt *tgt;
2722         struct qla_tgt_sess *sess;
2723         uint32_t lun, unpacked_lun;
2724         int lun_size, fn;
2725
2726         tgt = vha->vha_tgt.qla_tgt;
2727
2728         lun = a->u.isp24.fcp_cmnd.lun;
2729         lun_size = sizeof(a->u.isp24.fcp_cmnd.lun);
2730         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
2731         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
2732             a->u.isp24.fcp_hdr.s_id);
2733         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2734
2735         if (!sess) {
2736                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf024,
2737                     "qla_target(%d): task mgmt fn 0x%x for "
2738                     "non-existant session\n", vha->vp_idx, fn);
2739                 return qlt_sched_sess_work(tgt, QLA_TGT_SESS_WORK_TM, iocb,
2740                     sizeof(struct atio_from_isp));
2741         }
2742
2743         return qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
2744 }
2745
2746 /* ha->hardware_lock supposed to be held on entry */
2747 static int __qlt_abort_task(struct scsi_qla_host *vha,
2748         struct imm_ntfy_from_isp *iocb, struct qla_tgt_sess *sess)
2749 {
2750         struct atio_from_isp *a = (struct atio_from_isp *)iocb;
2751         struct qla_hw_data *ha = vha->hw;
2752         struct qla_tgt_mgmt_cmd *mcmd;
2753         uint32_t lun, unpacked_lun;
2754         int rc;
2755
2756         mcmd = mempool_alloc(qla_tgt_mgmt_cmd_mempool, GFP_ATOMIC);
2757         if (mcmd == NULL) {
2758                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf05f,
2759                     "qla_target(%d): %s: Allocation of ABORT cmd failed\n",
2760                     vha->vp_idx, __func__);
2761                 return -ENOMEM;
2762         }
2763         memset(mcmd, 0, sizeof(*mcmd));
2764
2765         mcmd->sess = sess;
2766         memcpy(&mcmd->orig_iocb.imm_ntfy, iocb,
2767             sizeof(mcmd->orig_iocb.imm_ntfy));
2768
2769         lun = a->u.isp24.fcp_cmnd.lun;
2770         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
2771
2772         rc = ha->tgt.tgt_ops->handle_tmr(mcmd, unpacked_lun, TMR_ABORT_TASK,
2773             le16_to_cpu(iocb->u.isp2x.seq_id));
2774         if (rc != 0) {
2775                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf060,
2776                     "qla_target(%d): tgt_ops->handle_tmr() failed: %d\n",
2777                     vha->vp_idx, rc);
2778                 mempool_free(mcmd, qla_tgt_mgmt_cmd_mempool);
2779                 return -EFAULT;
2780         }
2781
2782         return 0;
2783 }
2784
2785 /* ha->hardware_lock supposed to be held on entry */
2786 static int qlt_abort_task(struct scsi_qla_host *vha,
2787         struct imm_ntfy_from_isp *iocb)
2788 {
2789         struct qla_hw_data *ha = vha->hw;
2790         struct qla_tgt_sess *sess;
2791         int loop_id;
2792
2793         loop_id = GET_TARGET_ID(ha, (struct atio_from_isp *)iocb);
2794
2795         sess = ha->tgt.tgt_ops->find_sess_by_loop_id(vha, loop_id);
2796         if (sess == NULL) {
2797                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf025,
2798                     "qla_target(%d): task abort for unexisting "
2799                     "session\n", vha->vp_idx);
2800                 return qlt_sched_sess_work(vha->vha_tgt.qla_tgt,
2801                     QLA_TGT_SESS_WORK_ABORT, iocb, sizeof(*iocb));
2802         }
2803
2804         return __qlt_abort_task(vha, iocb, sess);
2805 }
2806
2807 /*
2808  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
2809  */
2810 static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
2811         struct imm_ntfy_from_isp *iocb)
2812 {
2813         int res = 0;
2814
2815         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf026,
2816             "qla_target(%d): Port ID: 0x%3phC ELS opcode: 0x%02x\n",
2817             vha->vp_idx, iocb->u.isp24.port_id, iocb->u.isp24.status_subcode);
2818
2819         switch (iocb->u.isp24.status_subcode) {
2820         case ELS_PLOGI:
2821         case ELS_FLOGI:
2822         case ELS_PRLI:
2823         case ELS_LOGO:
2824         case ELS_PRLO:
2825                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2826                 break;
2827         case ELS_PDISC:
2828         case ELS_ADISC:
2829         {
2830                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
2831                 if (tgt->link_reinit_iocb_pending) {
2832                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
2833                             0, 0, 0, 0, 0, 0);
2834                         tgt->link_reinit_iocb_pending = 0;
2835                 }
2836                 res = 1; /* send notify ack */
2837                 break;
2838         }
2839
2840         default:
2841                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf061,
2842                     "qla_target(%d): Unsupported ELS command %x "
2843                     "received\n", vha->vp_idx, iocb->u.isp24.status_subcode);
2844                 res = qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS);
2845                 break;
2846         }
2847
2848         return res;
2849 }
2850
2851 static int qlt_set_data_offset(struct qla_tgt_cmd *cmd, uint32_t offset)
2852 {
2853         struct scatterlist *sg, *sgp, *sg_srr, *sg_srr_start = NULL;
2854         size_t first_offset = 0, rem_offset = offset, tmp = 0;
2855         int i, sg_srr_cnt, bufflen = 0;
2856
2857         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe023,
2858             "Entering qla_tgt_set_data_offset: cmd: %p, cmd->sg: %p, "
2859             "cmd->sg_cnt: %u, direction: %d\n",
2860             cmd, cmd->sg, cmd->sg_cnt, cmd->dma_data_direction);
2861
2862         /*
2863          * FIXME: Reject non zero SRR relative offset until we can test
2864          * this code properly.
2865          */
2866         pr_debug("Rejecting non zero SRR rel_offs: %u\n", offset);
2867         return -1;
2868
2869         if (!cmd->sg || !cmd->sg_cnt) {
2870                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe055,
2871                     "Missing cmd->sg or zero cmd->sg_cnt in"
2872                     " qla_tgt_set_data_offset\n");
2873                 return -EINVAL;
2874         }
2875         /*
2876          * Walk the current cmd->sg list until we locate the new sg_srr_start
2877          */
2878         for_each_sg(cmd->sg, sg, cmd->sg_cnt, i) {
2879                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe024,
2880                     "sg[%d]: %p page: %p, length: %d, offset: %d\n",
2881                     i, sg, sg_page(sg), sg->length, sg->offset);
2882
2883                 if ((sg->length + tmp) > offset) {
2884                         first_offset = rem_offset;
2885                         sg_srr_start = sg;
2886                         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe025,
2887                             "Found matching sg[%d], using %p as sg_srr_start, "
2888                             "and using first_offset: %zu\n", i, sg,
2889                             first_offset);
2890                         break;
2891                 }
2892                 tmp += sg->length;
2893                 rem_offset -= sg->length;
2894         }
2895
2896         if (!sg_srr_start) {
2897                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe056,
2898                     "Unable to locate sg_srr_start for offset: %u\n", offset);
2899                 return -EINVAL;
2900         }
2901         sg_srr_cnt = (cmd->sg_cnt - i);
2902
2903         sg_srr = kzalloc(sizeof(struct scatterlist) * sg_srr_cnt, GFP_KERNEL);
2904         if (!sg_srr) {
2905                 ql_dbg(ql_dbg_tgt, cmd->vha, 0xe057,
2906                     "Unable to allocate sgp\n");
2907                 return -ENOMEM;
2908         }
2909         sg_init_table(sg_srr, sg_srr_cnt);
2910         sgp = &sg_srr[0];
2911         /*
2912          * Walk the remaining list for sg_srr_start, mapping to the newly
2913          * allocated sg_srr taking first_offset into account.
2914          */
2915         for_each_sg(sg_srr_start, sg, sg_srr_cnt, i) {
2916                 if (first_offset) {
2917                         sg_set_page(sgp, sg_page(sg),
2918                             (sg->length - first_offset), first_offset);
2919                         first_offset = 0;
2920                 } else {
2921                         sg_set_page(sgp, sg_page(sg), sg->length, 0);
2922                 }
2923                 bufflen += sgp->length;
2924
2925                 sgp = sg_next(sgp);
2926                 if (!sgp)
2927                         break;
2928         }
2929
2930         cmd->sg = sg_srr;
2931         cmd->sg_cnt = sg_srr_cnt;
2932         cmd->bufflen = bufflen;
2933         cmd->offset += offset;
2934         cmd->free_sg = 1;
2935
2936         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe026, "New cmd->sg: %p\n", cmd->sg);
2937         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe027, "New cmd->sg_cnt: %u\n",
2938             cmd->sg_cnt);
2939         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe028, "New cmd->bufflen: %u\n",
2940             cmd->bufflen);
2941         ql_dbg(ql_dbg_tgt, cmd->vha, 0xe029, "New cmd->offset: %u\n",
2942             cmd->offset);
2943
2944         if (cmd->sg_cnt < 0)
2945                 BUG();
2946
2947         if (cmd->bufflen < 0)
2948                 BUG();
2949
2950         return 0;
2951 }
2952
2953 static inline int qlt_srr_adjust_data(struct qla_tgt_cmd *cmd,
2954         uint32_t srr_rel_offs, int *xmit_type)
2955 {
2956         int res = 0, rel_offs;
2957
2958         rel_offs = srr_rel_offs - cmd->offset;
2959         ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf027, "srr_rel_offs=%d, rel_offs=%d",
2960             srr_rel_offs, rel_offs);
2961
2962         *xmit_type = QLA_TGT_XMIT_ALL;
2963
2964         if (rel_offs < 0) {
2965                 ql_dbg(ql_dbg_tgt_mgt, cmd->vha, 0xf062,
2966                     "qla_target(%d): SRR rel_offs (%d) < 0",
2967                     cmd->vha->vp_idx, rel_offs);
2968                 res = -1;
2969         } else if (rel_offs == cmd->bufflen)
2970                 *xmit_type = QLA_TGT_XMIT_STATUS;
2971         else if (rel_offs > 0)
2972                 res = qlt_set_data_offset(cmd, rel_offs);
2973
2974         return res;
2975 }
2976
2977 /* No locks, thread context */
2978 static void qlt_handle_srr(struct scsi_qla_host *vha,
2979         struct qla_tgt_srr_ctio *sctio, struct qla_tgt_srr_imm *imm)
2980 {
2981         struct imm_ntfy_from_isp *ntfy =
2982             (struct imm_ntfy_from_isp *)&imm->imm_ntfy;
2983         struct qla_hw_data *ha = vha->hw;
2984         struct qla_tgt_cmd *cmd = sctio->cmd;
2985         struct se_cmd *se_cmd = &cmd->se_cmd;
2986         unsigned long flags;
2987         int xmit_type = 0, resp = 0;
2988         uint32_t offset;
2989         uint16_t srr_ui;
2990
2991         offset = le32_to_cpu(ntfy->u.isp24.srr_rel_offs);
2992         srr_ui = ntfy->u.isp24.srr_ui;
2993
2994         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf028, "SRR cmd %p, srr_ui %x\n",
2995             cmd, srr_ui);
2996
2997         switch (srr_ui) {
2998         case SRR_IU_STATUS:
2999                 spin_lock_irqsave(&ha->hardware_lock, flags);
3000                 qlt_send_notify_ack(vha, ntfy,
3001                     0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3002                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3003                 xmit_type = QLA_TGT_XMIT_STATUS;
3004                 resp = 1;
3005                 break;
3006         case SRR_IU_DATA_IN:
3007                 if (!cmd->sg || !cmd->sg_cnt) {
3008                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf063,
3009                             "Unable to process SRR_IU_DATA_IN due to"
3010                             " missing cmd->sg, state: %d\n", cmd->state);
3011                         dump_stack();
3012                         goto out_reject;
3013                 }
3014                 if (se_cmd->scsi_status != 0) {
3015                         ql_dbg(ql_dbg_tgt, vha, 0xe02a,
3016                             "Rejecting SRR_IU_DATA_IN with non GOOD "
3017                             "scsi_status\n");
3018                         goto out_reject;
3019                 }
3020                 cmd->bufflen = se_cmd->data_length;
3021
3022                 if (qlt_has_data(cmd)) {
3023                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3024                                 goto out_reject;
3025                         spin_lock_irqsave(&ha->hardware_lock, flags);
3026                         qlt_send_notify_ack(vha, ntfy,
3027                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3028                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3029                         resp = 1;
3030                 } else {
3031                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf064,
3032                             "qla_target(%d): SRR for in data for cmd "
3033                             "without them (tag %d, SCSI status %d), "
3034                             "reject", vha->vp_idx, cmd->tag,
3035                             cmd->se_cmd.scsi_status);
3036                         goto out_reject;
3037                 }
3038                 break;
3039         case SRR_IU_DATA_OUT:
3040                 if (!cmd->sg || !cmd->sg_cnt) {
3041                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf065,
3042                             "Unable to process SRR_IU_DATA_OUT due to"
3043                             " missing cmd->sg\n");
3044                         dump_stack();
3045                         goto out_reject;
3046                 }
3047                 if (se_cmd->scsi_status != 0) {
3048                         ql_dbg(ql_dbg_tgt, vha, 0xe02b,
3049                             "Rejecting SRR_IU_DATA_OUT"
3050                             " with non GOOD scsi_status\n");
3051                         goto out_reject;
3052                 }
3053                 cmd->bufflen = se_cmd->data_length;
3054
3055                 if (qlt_has_data(cmd)) {
3056                         if (qlt_srr_adjust_data(cmd, offset, &xmit_type) != 0)
3057                                 goto out_reject;
3058                         spin_lock_irqsave(&ha->hardware_lock, flags);
3059                         qlt_send_notify_ack(vha, ntfy,
3060                             0, 0, 0, NOTIFY_ACK_SRR_FLAGS_ACCEPT, 0, 0);
3061                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3062                         if (xmit_type & QLA_TGT_XMIT_DATA)
3063                                 qlt_rdy_to_xfer(cmd);
3064                 } else {
3065                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf066,
3066                             "qla_target(%d): SRR for out data for cmd "
3067                             "without them (tag %d, SCSI status %d), "
3068                             "reject", vha->vp_idx, cmd->tag,
3069                             cmd->se_cmd.scsi_status);
3070                         goto out_reject;
3071                 }
3072                 break;
3073         default:
3074                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf067,
3075                     "qla_target(%d): Unknown srr_ui value %x",
3076                     vha->vp_idx, srr_ui);
3077                 goto out_reject;
3078         }
3079
3080         /* Transmit response in case of status and data-in cases */
3081         if (resp)
3082                 qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
3083
3084         return;
3085
3086 out_reject:
3087         spin_lock_irqsave(&ha->hardware_lock, flags);
3088         qlt_send_notify_ack(vha, ntfy, 0, 0, 0,
3089             NOTIFY_ACK_SRR_FLAGS_REJECT,
3090             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3091             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3092         if (cmd->state == QLA_TGT_STATE_NEED_DATA) {
3093                 cmd->state = QLA_TGT_STATE_DATA_IN;
3094                 dump_stack();
3095         } else
3096                 qlt_send_term_exchange(vha, cmd, &cmd->atio, 1);
3097         spin_unlock_irqrestore(&ha->hardware_lock, flags);
3098 }
3099
3100 static void qlt_reject_free_srr_imm(struct scsi_qla_host *vha,
3101         struct qla_tgt_srr_imm *imm, int ha_locked)
3102 {
3103         struct qla_hw_data *ha = vha->hw;
3104         unsigned long flags = 0;
3105
3106         if (!ha_locked)
3107                 spin_lock_irqsave(&ha->hardware_lock, flags);
3108
3109         qlt_send_notify_ack(vha, (void *)&imm->imm_ntfy, 0, 0, 0,
3110             NOTIFY_ACK_SRR_FLAGS_REJECT,
3111             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3112             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3113
3114         if (!ha_locked)
3115                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3116
3117         kfree(imm);
3118 }
3119
3120 static void qlt_handle_srr_work(struct work_struct *work)
3121 {
3122         struct qla_tgt *tgt = container_of(work, struct qla_tgt, srr_work);
3123         struct scsi_qla_host *vha = tgt->vha;
3124         struct qla_tgt_srr_ctio *sctio;
3125         unsigned long flags;
3126
3127         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf029, "Entering SRR work (tgt %p)\n",
3128             tgt);
3129
3130 restart:
3131         spin_lock_irqsave(&tgt->srr_lock, flags);
3132         list_for_each_entry(sctio, &tgt->srr_ctio_list, srr_list_entry) {
3133                 struct qla_tgt_srr_imm *imm, *i, *ti;
3134                 struct qla_tgt_cmd *cmd;
3135                 struct se_cmd *se_cmd;
3136
3137                 imm = NULL;
3138                 list_for_each_entry_safe(i, ti, &tgt->srr_imm_list,
3139                                                 srr_list_entry) {
3140                         if (i->srr_id == sctio->srr_id) {
3141                                 list_del(&i->srr_list_entry);
3142                                 if (imm) {
3143                                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf068,
3144                                           "qla_target(%d): There must be "
3145                                           "only one IMM SRR per CTIO SRR "
3146                                           "(IMM SRR %p, id %d, CTIO %p\n",
3147                                           vha->vp_idx, i, i->srr_id, sctio);
3148                                         qlt_reject_free_srr_imm(tgt->vha, i, 0);
3149                                 } else
3150                                         imm = i;
3151                         }
3152                 }
3153
3154                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02a,
3155                     "IMM SRR %p, CTIO SRR %p (id %d)\n", imm, sctio,
3156                     sctio->srr_id);
3157
3158                 if (imm == NULL) {
3159                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02b,
3160                             "Not found matching IMM for SRR CTIO (id %d)\n",
3161                             sctio->srr_id);
3162                         continue;
3163                 } else
3164                         list_del(&sctio->srr_list_entry);
3165
3166                 spin_unlock_irqrestore(&tgt->srr_lock, flags);
3167
3168                 cmd = sctio->cmd;
3169                 /*
3170                  * Reset qla_tgt_cmd SRR values and SGL pointer+count to follow
3171                  * tcm_qla2xxx_write_pending() and tcm_qla2xxx_queue_data_in()
3172                  * logic..
3173                  */
3174                 cmd->offset = 0;
3175                 if (cmd->free_sg) {
3176                         kfree(cmd->sg);
3177                         cmd->sg = NULL;
3178                         cmd->free_sg = 0;
3179                 }
3180                 se_cmd = &cmd->se_cmd;
3181
3182                 cmd->sg_cnt = se_cmd->t_data_nents;
3183                 cmd->sg = se_cmd->t_data_sg;
3184
3185                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02c,
3186                     "SRR cmd %p (se_cmd %p, tag %d, op %x), "
3187                     "sg_cnt=%d, offset=%d", cmd, &cmd->se_cmd, cmd->tag,
3188                     se_cmd->t_task_cdb[0], cmd->sg_cnt, cmd->offset);
3189
3190                 qlt_handle_srr(vha, sctio, imm);
3191
3192                 kfree(imm);
3193                 kfree(sctio);
3194                 goto restart;
3195         }
3196         spin_unlock_irqrestore(&tgt->srr_lock, flags);
3197 }
3198
3199 /* ha->hardware_lock supposed to be held on entry */
3200 static void qlt_prepare_srr_imm(struct scsi_qla_host *vha,
3201         struct imm_ntfy_from_isp *iocb)
3202 {
3203         struct qla_tgt_srr_imm *imm;
3204         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3205         struct qla_tgt_srr_ctio *sctio;
3206
3207         tgt->imm_srr_id++;
3208
3209         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02d, "qla_target(%d): SRR received\n",
3210             vha->vp_idx);
3211
3212         imm = kzalloc(sizeof(*imm), GFP_ATOMIC);
3213         if (imm != NULL) {
3214                 memcpy(&imm->imm_ntfy, iocb, sizeof(imm->imm_ntfy));
3215
3216                 /* IRQ is already OFF */
3217                 spin_lock(&tgt->srr_lock);
3218                 imm->srr_id = tgt->imm_srr_id;
3219                 list_add_tail(&imm->srr_list_entry,
3220                     &tgt->srr_imm_list);
3221                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02e,
3222                     "IMM NTFY SRR %p added (id %d, ui %x)\n",
3223                     imm, imm->srr_id, iocb->u.isp24.srr_ui);
3224                 if (tgt->imm_srr_id == tgt->ctio_srr_id) {
3225                         int found = 0;
3226                         list_for_each_entry(sctio, &tgt->srr_ctio_list,
3227                             srr_list_entry) {
3228                                 if (sctio->srr_id == imm->srr_id) {
3229                                         found = 1;
3230                                         break;
3231                                 }
3232                         }
3233                         if (found) {
3234                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf02f, "%s",
3235                                     "Scheduling srr work\n");
3236                                 schedule_work(&tgt->srr_work);
3237                         } else {
3238                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf030,
3239                                     "qla_target(%d): imm_srr_id "
3240                                     "== ctio_srr_id (%d), but there is no "
3241                                     "corresponding SRR CTIO, deleting IMM "
3242                                     "SRR %p\n", vha->vp_idx, tgt->ctio_srr_id,
3243                                     imm);
3244                                 list_del(&imm->srr_list_entry);
3245
3246                                 kfree(imm);
3247
3248                                 spin_unlock(&tgt->srr_lock);
3249                                 goto out_reject;
3250                         }
3251                 }
3252                 spin_unlock(&tgt->srr_lock);
3253         } else {
3254                 struct qla_tgt_srr_ctio *ts;
3255
3256                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf069,
3257                     "qla_target(%d): Unable to allocate SRR IMM "
3258                     "entry, SRR request will be rejected\n", vha->vp_idx);
3259
3260                 /* IRQ is already OFF */
3261                 spin_lock(&tgt->srr_lock);
3262                 list_for_each_entry_safe(sctio, ts, &tgt->srr_ctio_list,
3263                     srr_list_entry) {
3264                         if (sctio->srr_id == tgt->imm_srr_id) {
3265                                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf031,
3266                                     "CTIO SRR %p deleted (id %d)\n",
3267                                     sctio, sctio->srr_id);
3268                                 list_del(&sctio->srr_list_entry);
3269                                 qlt_send_term_exchange(vha, sctio->cmd,
3270                                     &sctio->cmd->atio, 1);
3271                                 kfree(sctio);
3272                         }
3273                 }
3274                 spin_unlock(&tgt->srr_lock);
3275                 goto out_reject;
3276         }
3277
3278         return;
3279
3280 out_reject:
3281         qlt_send_notify_ack(vha, iocb, 0, 0, 0,
3282             NOTIFY_ACK_SRR_FLAGS_REJECT,
3283             NOTIFY_ACK_SRR_REJECT_REASON_UNABLE_TO_PERFORM,
3284             NOTIFY_ACK_SRR_FLAGS_REJECT_EXPL_NO_EXPL);
3285 }
3286
3287 /*
3288  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3289  */
3290 static void qlt_handle_imm_notify(struct scsi_qla_host *vha,
3291         struct imm_ntfy_from_isp *iocb)
3292 {
3293         struct qla_hw_data *ha = vha->hw;
3294         uint32_t add_flags = 0;
3295         int send_notify_ack = 1;
3296         uint16_t status;
3297
3298         status = le16_to_cpu(iocb->u.isp2x.status);
3299         switch (status) {
3300         case IMM_NTFY_LIP_RESET:
3301         {
3302                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf032,
3303                     "qla_target(%d): LIP reset (loop %#x), subcode %x\n",
3304                     vha->vp_idx, le16_to_cpu(iocb->u.isp24.nport_handle),
3305                     iocb->u.isp24.status_subcode);
3306
3307                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3308                         send_notify_ack = 0;
3309                 break;
3310         }
3311
3312         case IMM_NTFY_LIP_LINK_REINIT:
3313         {
3314                 struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3315                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf033,
3316                     "qla_target(%d): LINK REINIT (loop %#x, "
3317                     "subcode %x)\n", vha->vp_idx,
3318                     le16_to_cpu(iocb->u.isp24.nport_handle),
3319                     iocb->u.isp24.status_subcode);
3320                 if (tgt->link_reinit_iocb_pending) {
3321                         qlt_send_notify_ack(vha, &tgt->link_reinit_iocb,
3322                             0, 0, 0, 0, 0, 0);
3323                 }
3324                 memcpy(&tgt->link_reinit_iocb, iocb, sizeof(*iocb));
3325                 tgt->link_reinit_iocb_pending = 1;
3326                 /*
3327                  * QLogic requires to wait after LINK REINIT for possible
3328                  * PDISC or ADISC ELS commands
3329                  */
3330                 send_notify_ack = 0;
3331                 break;
3332         }
3333
3334         case IMM_NTFY_PORT_LOGOUT:
3335                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf034,
3336                     "qla_target(%d): Port logout (loop "
3337                     "%#x, subcode %x)\n", vha->vp_idx,
3338                     le16_to_cpu(iocb->u.isp24.nport_handle),
3339                     iocb->u.isp24.status_subcode);
3340
3341                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS_SESS) == 0)
3342                         send_notify_ack = 0;
3343                 /* The sessions will be cleared in the callback, if needed */
3344                 break;
3345
3346         case IMM_NTFY_GLBL_TPRLO:
3347                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf035,
3348                     "qla_target(%d): Global TPRLO (%x)\n", vha->vp_idx, status);
3349                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3350                         send_notify_ack = 0;
3351                 /* The sessions will be cleared in the callback, if needed */
3352                 break;
3353
3354         case IMM_NTFY_PORT_CONFIG:
3355                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf036,
3356                     "qla_target(%d): Port config changed (%x)\n", vha->vp_idx,
3357                     status);
3358                 if (qlt_reset(vha, iocb, QLA_TGT_ABORT_ALL) == 0)
3359                         send_notify_ack = 0;
3360                 /* The sessions will be cleared in the callback, if needed */
3361                 break;
3362
3363         case IMM_NTFY_GLBL_LOGO:
3364                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06a,
3365                     "qla_target(%d): Link failure detected\n",
3366                     vha->vp_idx);
3367                 /* I_T nexus loss */
3368                 if (qlt_reset(vha, iocb, QLA_TGT_NEXUS_LOSS) == 0)
3369                         send_notify_ack = 0;
3370                 break;
3371
3372         case IMM_NTFY_IOCB_OVERFLOW:
3373                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06b,
3374                     "qla_target(%d): Cannot provide requested "
3375                     "capability (IOCB overflowed the immediate notify "
3376                     "resource count)\n", vha->vp_idx);
3377                 break;
3378
3379         case IMM_NTFY_ABORT_TASK:
3380                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf037,
3381                     "qla_target(%d): Abort Task (S %08x I %#x -> "
3382                     "L %#x)\n", vha->vp_idx,
3383                     le16_to_cpu(iocb->u.isp2x.seq_id),
3384                     GET_TARGET_ID(ha, (struct atio_from_isp *)iocb),
3385                     le16_to_cpu(iocb->u.isp2x.lun));
3386                 if (qlt_abort_task(vha, iocb) == 0)
3387                         send_notify_ack = 0;
3388                 break;
3389
3390         case IMM_NTFY_RESOURCE:
3391                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06c,
3392                     "qla_target(%d): Out of resources, host %ld\n",
3393                     vha->vp_idx, vha->host_no);
3394                 break;
3395
3396         case IMM_NTFY_MSG_RX:
3397                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf038,
3398                     "qla_target(%d): Immediate notify task %x\n",
3399                     vha->vp_idx, iocb->u.isp2x.task_flags);
3400                 if (qlt_handle_task_mgmt(vha, iocb) == 0)
3401                         send_notify_ack = 0;
3402                 break;
3403
3404         case IMM_NTFY_ELS:
3405                 if (qlt_24xx_handle_els(vha, iocb) == 0)
3406                         send_notify_ack = 0;
3407                 break;
3408
3409         case IMM_NTFY_SRR:
3410                 qlt_prepare_srr_imm(vha, iocb);
3411                 send_notify_ack = 0;
3412                 break;
3413
3414         default:
3415                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06d,
3416                     "qla_target(%d): Received unknown immediate "
3417                     "notify status %x\n", vha->vp_idx, status);
3418                 break;
3419         }
3420
3421         if (send_notify_ack)
3422                 qlt_send_notify_ack(vha, iocb, add_flags, 0, 0, 0, 0, 0);
3423 }
3424
3425 /*
3426  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3427  * This function sends busy to ISP 2xxx or 24xx.
3428  */
3429 static void qlt_send_busy(struct scsi_qla_host *vha,
3430         struct atio_from_isp *atio, uint16_t status)
3431 {
3432         struct ctio7_to_24xx *ctio24;
3433         struct qla_hw_data *ha = vha->hw;
3434         request_t *pkt;
3435         struct qla_tgt_sess *sess = NULL;
3436
3437         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3438             atio->u.isp24.fcp_hdr.s_id);
3439         if (!sess) {
3440                 qlt_send_term_exchange(vha, NULL, atio, 1);
3441                 return;
3442         }
3443         /* Sending marker isn't necessary, since we called from ISR */
3444
3445         pkt = (request_t *)qla2x00_alloc_iocbs(vha, NULL);
3446         if (!pkt) {
3447                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06e,
3448                     "qla_target(%d): %s failed: unable to allocate "
3449                     "request packet", vha->vp_idx, __func__);
3450                 return;
3451         }
3452
3453         pkt->entry_count = 1;
3454         pkt->handle = QLA_TGT_SKIP_HANDLE | CTIO_COMPLETION_HANDLE_MARK;
3455
3456         ctio24 = (struct ctio7_to_24xx *)pkt;
3457         ctio24->entry_type = CTIO_TYPE7;
3458         ctio24->nport_handle = sess->loop_id;
3459         ctio24->timeout = __constant_cpu_to_le16(QLA_TGT_TIMEOUT);
3460         ctio24->vp_index = vha->vp_idx;
3461         ctio24->initiator_id[0] = atio->u.isp24.fcp_hdr.s_id[2];
3462         ctio24->initiator_id[1] = atio->u.isp24.fcp_hdr.s_id[1];
3463         ctio24->initiator_id[2] = atio->u.isp24.fcp_hdr.s_id[0];
3464         ctio24->exchange_addr = atio->u.isp24.exchange_addr;
3465         ctio24->u.status1.flags = (atio->u.isp24.attr << 9) |
3466             __constant_cpu_to_le16(
3467                 CTIO7_FLAGS_STATUS_MODE_1 | CTIO7_FLAGS_SEND_STATUS |
3468                 CTIO7_FLAGS_DONT_RET_CTIO);
3469         /*
3470          * CTIO from fw w/o se_cmd doesn't provide enough info to retry it,
3471          * if the explicit conformation is used.
3472          */
3473         ctio24->u.status1.ox_id = swab16(atio->u.isp24.fcp_hdr.ox_id);
3474         ctio24->u.status1.scsi_status = cpu_to_le16(status);
3475         ctio24->u.status1.residual = get_unaligned((uint32_t *)
3476             &atio->u.isp24.fcp_cmnd.add_cdb[
3477             atio->u.isp24.fcp_cmnd.add_cdb_len]);
3478         if (ctio24->u.status1.residual != 0)
3479                 ctio24->u.status1.scsi_status |= SS_RESIDUAL_UNDER;
3480
3481         qla2x00_start_iocbs(vha, vha->req);
3482 }
3483
3484 /* ha->hardware_lock supposed to be held on entry */
3485 /* called via callback from qla2xxx */
3486 static void qlt_24xx_atio_pkt(struct scsi_qla_host *vha,
3487         struct atio_from_isp *atio)
3488 {
3489         struct qla_hw_data *ha = vha->hw;
3490         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3491         int rc;
3492
3493         if (unlikely(tgt == NULL)) {
3494                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf039,
3495                     "ATIO pkt, but no tgt (ha %p)", ha);
3496                 return;
3497         }
3498         ql_dbg(ql_dbg_tgt, vha, 0xe02c,
3499             "qla_target(%d): ATIO pkt %p: type %02x count %02x",
3500             vha->vp_idx, atio, atio->u.raw.entry_type,
3501             atio->u.raw.entry_count);
3502         /*
3503          * In tgt_stop mode we also should allow all requests to pass.
3504          * Otherwise, some commands can stuck.
3505          */
3506
3507         tgt->irq_cmd_count++;
3508
3509         switch (atio->u.raw.entry_type) {
3510         case ATIO_TYPE7:
3511                 ql_dbg(ql_dbg_tgt, vha, 0xe02d,
3512                     "ATIO_TYPE7 instance %d, lun %Lx, read/write %d/%d, "
3513                     "add_cdb_len %d, data_length %04x, s_id %x:%x:%x\n",
3514                     vha->vp_idx, atio->u.isp24.fcp_cmnd.lun,
3515                     atio->u.isp24.fcp_cmnd.rddata,
3516                     atio->u.isp24.fcp_cmnd.wrdata,
3517                     atio->u.isp24.fcp_cmnd.add_cdb_len,
3518                     be32_to_cpu(get_unaligned((uint32_t *)
3519                         &atio->u.isp24.fcp_cmnd.add_cdb[
3520                         atio->u.isp24.fcp_cmnd.add_cdb_len])),
3521                     atio->u.isp24.fcp_hdr.s_id[0],
3522                     atio->u.isp24.fcp_hdr.s_id[1],
3523                     atio->u.isp24.fcp_hdr.s_id[2]);
3524
3525                 if (unlikely(atio->u.isp24.exchange_addr ==
3526                     ATIO_EXCHANGE_ADDRESS_UNKNOWN)) {
3527                         ql_dbg(ql_dbg_tgt, vha, 0xe058,
3528                             "qla_target(%d): ATIO_TYPE7 "
3529                             "received with UNKNOWN exchange address, "
3530                             "sending QUEUE_FULL\n", vha->vp_idx);
3531                         qlt_send_busy(vha, atio, SAM_STAT_TASK_SET_FULL);
3532                         break;
3533                 }
3534                 if (likely(atio->u.isp24.fcp_cmnd.task_mgmt_flags == 0))
3535                         rc = qlt_handle_cmd_for_atio(vha, atio);
3536                 else
3537                         rc = qlt_handle_task_mgmt(vha, atio);
3538                 if (unlikely(rc != 0)) {
3539                         if (rc == -ESRCH) {
3540 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3541                                 qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3542 #else
3543                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3544 #endif
3545                         } else {
3546                                 if (tgt->tgt_stop) {
3547                                         ql_dbg(ql_dbg_tgt, vha, 0xe059,
3548                                             "qla_target: Unable to send "
3549                                             "command to target for req, "
3550                                             "ignoring.\n");
3551                                 } else {
3552                                         ql_dbg(ql_dbg_tgt, vha, 0xe05a,
3553                                             "qla_target(%d): Unable to send "
3554                                             "command to target, sending BUSY "
3555                                             "status.\n", vha->vp_idx);
3556                                         qlt_send_busy(vha, atio, SAM_STAT_BUSY);
3557                                 }
3558                         }
3559                 }
3560                 break;
3561
3562         case IMMED_NOTIFY_TYPE:
3563         {
3564                 if (unlikely(atio->u.isp2x.entry_status != 0)) {
3565                         ql_dbg(ql_dbg_tgt, vha, 0xe05b,
3566                             "qla_target(%d): Received ATIO packet %x "
3567                             "with error status %x\n", vha->vp_idx,
3568                             atio->u.raw.entry_type,
3569                             atio->u.isp2x.entry_status);
3570                         break;
3571                 }
3572                 ql_dbg(ql_dbg_tgt, vha, 0xe02e, "%s", "IMMED_NOTIFY ATIO");
3573                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)atio);
3574                 break;
3575         }
3576
3577         default:
3578                 ql_dbg(ql_dbg_tgt, vha, 0xe05c,
3579                     "qla_target(%d): Received unknown ATIO atio "
3580                     "type %x\n", vha->vp_idx, atio->u.raw.entry_type);
3581                 break;
3582         }
3583
3584         tgt->irq_cmd_count--;
3585 }
3586
3587 /* ha->hardware_lock supposed to be held on entry */
3588 /* called via callback from qla2xxx */
3589 static void qlt_response_pkt(struct scsi_qla_host *vha, response_t *pkt)
3590 {
3591         struct qla_hw_data *ha = vha->hw;
3592         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3593
3594         if (unlikely(tgt == NULL)) {
3595                 ql_dbg(ql_dbg_tgt, vha, 0xe05d,
3596                     "qla_target(%d): Response pkt %x received, but no "
3597                     "tgt (ha %p)\n", vha->vp_idx, pkt->entry_type, ha);
3598                 return;
3599         }
3600
3601         ql_dbg(ql_dbg_tgt, vha, 0xe02f,
3602             "qla_target(%d): response pkt %p: T %02x C %02x S %02x "
3603             "handle %#x\n", vha->vp_idx, pkt, pkt->entry_type,
3604             pkt->entry_count, pkt->entry_status, pkt->handle);
3605
3606         /*
3607          * In tgt_stop mode we also should allow all requests to pass.
3608          * Otherwise, some commands can stuck.
3609          */
3610
3611         tgt->irq_cmd_count++;
3612
3613         switch (pkt->entry_type) {
3614         case CTIO_TYPE7:
3615         {
3616                 struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
3617                 ql_dbg(ql_dbg_tgt, vha, 0xe030, "CTIO_TYPE7: instance %d\n",
3618                     vha->vp_idx);
3619                 qlt_do_ctio_completion(vha, entry->handle,
3620                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3621                     entry);
3622                 break;
3623         }
3624
3625         case ACCEPT_TGT_IO_TYPE:
3626         {
3627                 struct atio_from_isp *atio = (struct atio_from_isp *)pkt;
3628                 int rc;
3629                 ql_dbg(ql_dbg_tgt, vha, 0xe031,
3630                     "ACCEPT_TGT_IO instance %d status %04x "
3631                     "lun %04x read/write %d data_length %04x "
3632                     "target_id %02x rx_id %04x\n ", vha->vp_idx,
3633                     le16_to_cpu(atio->u.isp2x.status),
3634                     le16_to_cpu(atio->u.isp2x.lun),
3635                     atio->u.isp2x.execution_codes,
3636                     le32_to_cpu(atio->u.isp2x.data_length), GET_TARGET_ID(ha,
3637                     atio), atio->u.isp2x.rx_id);
3638                 if (atio->u.isp2x.status !=
3639                     __constant_cpu_to_le16(ATIO_CDB_VALID)) {
3640                         ql_dbg(ql_dbg_tgt, vha, 0xe05e,
3641                             "qla_target(%d): ATIO with error "
3642                             "status %x received\n", vha->vp_idx,
3643                             le16_to_cpu(atio->u.isp2x.status));
3644                         break;
3645                 }
3646                 ql_dbg(ql_dbg_tgt, vha, 0xe032,
3647                     "FCP CDB: 0x%02x, sizeof(cdb): %lu",
3648                     atio->u.isp2x.cdb[0], (unsigned long
3649                     int)sizeof(atio->u.isp2x.cdb));
3650
3651                 rc = qlt_handle_cmd_for_atio(vha, atio);
3652                 if (unlikely(rc != 0)) {
3653                         if (rc == -ESRCH) {
3654 #if 1 /* With TERM EXCHANGE some FC cards refuse to boot */
3655                                 qlt_send_busy(vha, atio, 0);
3656 #else
3657                                 qlt_send_term_exchange(vha, NULL, atio, 1);
3658 #endif
3659                         } else {
3660                                 if (tgt->tgt_stop) {
3661                                         ql_dbg(ql_dbg_tgt, vha, 0xe05f,
3662                                             "qla_target: Unable to send "
3663                                             "command to target, sending TERM "
3664                                             "EXCHANGE for rsp\n");
3665                                         qlt_send_term_exchange(vha, NULL,
3666                                             atio, 1);
3667                                 } else {
3668                                         ql_dbg(ql_dbg_tgt, vha, 0xe060,
3669                                             "qla_target(%d): Unable to send "
3670                                             "command to target, sending BUSY "
3671                                             "status\n", vha->vp_idx);
3672                                         qlt_send_busy(vha, atio, 0);
3673                                 }
3674                         }
3675                 }
3676         }
3677         break;
3678
3679         case CONTINUE_TGT_IO_TYPE:
3680         {
3681                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3682                 ql_dbg(ql_dbg_tgt, vha, 0xe033,
3683                     "CONTINUE_TGT_IO: instance %d\n", vha->vp_idx);
3684                 qlt_do_ctio_completion(vha, entry->handle,
3685                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3686                     entry);
3687                 break;
3688         }
3689
3690         case CTIO_A64_TYPE:
3691         {
3692                 struct ctio_to_2xxx *entry = (struct ctio_to_2xxx *)pkt;
3693                 ql_dbg(ql_dbg_tgt, vha, 0xe034, "CTIO_A64: instance %d\n",
3694                     vha->vp_idx);
3695                 qlt_do_ctio_completion(vha, entry->handle,
3696                     le16_to_cpu(entry->status)|(pkt->entry_status << 16),
3697                     entry);
3698                 break;
3699         }
3700
3701         case IMMED_NOTIFY_TYPE:
3702                 ql_dbg(ql_dbg_tgt, vha, 0xe035, "%s", "IMMED_NOTIFY\n");
3703                 qlt_handle_imm_notify(vha, (struct imm_ntfy_from_isp *)pkt);
3704                 break;
3705
3706         case NOTIFY_ACK_TYPE:
3707                 if (tgt->notify_ack_expected > 0) {
3708                         struct nack_to_isp *entry = (struct nack_to_isp *)pkt;
3709                         ql_dbg(ql_dbg_tgt, vha, 0xe036,
3710                             "NOTIFY_ACK seq %08x status %x\n",
3711                             le16_to_cpu(entry->u.isp2x.seq_id),
3712                             le16_to_cpu(entry->u.isp2x.status));
3713                         tgt->notify_ack_expected--;
3714                         if (entry->u.isp2x.status !=
3715                             __constant_cpu_to_le16(NOTIFY_ACK_SUCCESS)) {
3716                                 ql_dbg(ql_dbg_tgt, vha, 0xe061,
3717                                     "qla_target(%d): NOTIFY_ACK "
3718                                     "failed %x\n", vha->vp_idx,
3719                                     le16_to_cpu(entry->u.isp2x.status));
3720                         }
3721                 } else {
3722                         ql_dbg(ql_dbg_tgt, vha, 0xe062,
3723                             "qla_target(%d): Unexpected NOTIFY_ACK received\n",
3724                             vha->vp_idx);
3725                 }
3726                 break;
3727
3728         case ABTS_RECV_24XX:
3729                 ql_dbg(ql_dbg_tgt, vha, 0xe037,
3730                     "ABTS_RECV_24XX: instance %d\n", vha->vp_idx);
3731                 qlt_24xx_handle_abts(vha, (struct abts_recv_from_24xx *)pkt);
3732                 break;
3733
3734         case ABTS_RESP_24XX:
3735                 if (tgt->abts_resp_expected > 0) {
3736                         struct abts_resp_from_24xx_fw *entry =
3737                                 (struct abts_resp_from_24xx_fw *)pkt;
3738                         ql_dbg(ql_dbg_tgt, vha, 0xe038,
3739                             "ABTS_RESP_24XX: compl_status %x\n",
3740                             entry->compl_status);
3741                         tgt->abts_resp_expected--;
3742                         if (le16_to_cpu(entry->compl_status) !=
3743                             ABTS_RESP_COMPL_SUCCESS) {
3744                                 if ((entry->error_subcode1 == 0x1E) &&
3745                                     (entry->error_subcode2 == 0)) {
3746                                         /*
3747                                          * We've got a race here: aborted
3748                                          * exchange not terminated, i.e.
3749                                          * response for the aborted command was
3750                                          * sent between the abort request was
3751                                          * received and processed.
3752                                          * Unfortunately, the firmware has a
3753                                          * silly requirement that all aborted
3754                                          * exchanges must be explicitely
3755                                          * terminated, otherwise it refuses to
3756                                          * send responses for the abort
3757                                          * requests. So, we have to
3758                                          * (re)terminate the exchange and retry
3759                                          * the abort response.
3760                                          */
3761                                         qlt_24xx_retry_term_exchange(vha,
3762                                             entry);
3763                                 } else
3764                                         ql_dbg(ql_dbg_tgt, vha, 0xe063,
3765                                             "qla_target(%d): ABTS_RESP_24XX "
3766                                             "failed %x (subcode %x:%x)",
3767                                             vha->vp_idx, entry->compl_status,
3768                                             entry->error_subcode1,
3769                                             entry->error_subcode2);
3770                         }
3771                 } else {
3772                         ql_dbg(ql_dbg_tgt, vha, 0xe064,
3773                             "qla_target(%d): Unexpected ABTS_RESP_24XX "
3774                             "received\n", vha->vp_idx);
3775                 }
3776                 break;
3777
3778         default:
3779                 ql_dbg(ql_dbg_tgt, vha, 0xe065,
3780                     "qla_target(%d): Received unknown response pkt "
3781                     "type %x\n", vha->vp_idx, pkt->entry_type);
3782                 break;
3783         }
3784
3785         tgt->irq_cmd_count--;
3786 }
3787
3788 /*
3789  * ha->hardware_lock supposed to be held on entry. Might drop it, then reaquire
3790  */
3791 void qlt_async_event(uint16_t code, struct scsi_qla_host *vha,
3792         uint16_t *mailbox)
3793 {
3794         struct qla_hw_data *ha = vha->hw;
3795         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
3796         int login_code;
3797
3798         ql_dbg(ql_dbg_tgt, vha, 0xe039,
3799             "scsi(%ld): ha state %d init_done %d oper_mode %d topo %d\n",
3800             vha->host_no, atomic_read(&vha->loop_state), vha->flags.init_done,
3801             ha->operating_mode, ha->current_topology);
3802
3803         if (!ha->tgt.tgt_ops)
3804                 return;
3805
3806         if (unlikely(tgt == NULL)) {
3807                 ql_dbg(ql_dbg_tgt, vha, 0xe03a,
3808                     "ASYNC EVENT %#x, but no tgt (ha %p)\n", code, ha);
3809                 return;
3810         }
3811
3812         if (((code == MBA_POINT_TO_POINT) || (code == MBA_CHG_IN_CONNECTION)) &&
3813             IS_QLA2100(ha))
3814                 return;
3815         /*
3816          * In tgt_stop mode we also should allow all requests to pass.
3817          * Otherwise, some commands can stuck.
3818          */
3819
3820         tgt->irq_cmd_count++;
3821
3822         switch (code) {
3823         case MBA_RESET:                 /* Reset */
3824         case MBA_SYSTEM_ERR:            /* System Error */
3825         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
3826         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
3827                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03a,
3828                     "qla_target(%d): System error async event %#x "
3829                     "occurred", vha->vp_idx, code);
3830                 break;
3831         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up. */
3832                 set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
3833                 break;
3834
3835         case MBA_LOOP_UP:
3836         {
3837                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03b,
3838                     "qla_target(%d): Async LOOP_UP occurred "
3839                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3840                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3841                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3842                 if (tgt->link_reinit_iocb_pending) {
3843                         qlt_send_notify_ack(vha, (void *)&tgt->link_reinit_iocb,
3844                             0, 0, 0, 0, 0, 0);
3845                         tgt->link_reinit_iocb_pending = 0;
3846                 }
3847                 break;
3848         }
3849
3850         case MBA_LIP_OCCURRED:
3851         case MBA_LOOP_DOWN:
3852         case MBA_LIP_RESET:
3853         case MBA_RSCN_UPDATE:
3854                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03c,
3855                     "qla_target(%d): Async event %#x occurred "
3856                     "(m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3857                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3858                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3859                 break;
3860
3861         case MBA_PORT_UPDATE:
3862                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03d,
3863                     "qla_target(%d): Port update async event %#x "
3864                     "occurred: updating the ports database (m[0]=%x, m[1]=%x, "
3865                     "m[2]=%x, m[3]=%x)", vha->vp_idx, code,
3866                     le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3867                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3868
3869                 login_code = le16_to_cpu(mailbox[2]);
3870                 if (login_code == 0x4)
3871                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03e,
3872                             "Async MB 2: Got PLOGI Complete\n");
3873                 else if (login_code == 0x7)
3874                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf03f,
3875                             "Async MB 2: Port Logged Out\n");
3876                 break;
3877
3878         default:
3879                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf040,
3880                     "qla_target(%d): Async event %#x occurred: "
3881                     "ignore (m[0]=%x, m[1]=%x, m[2]=%x, m[3]=%x)", vha->vp_idx,
3882                     code, le16_to_cpu(mailbox[0]), le16_to_cpu(mailbox[1]),
3883                     le16_to_cpu(mailbox[2]), le16_to_cpu(mailbox[3]));
3884                 break;
3885         }
3886
3887         tgt->irq_cmd_count--;
3888 }
3889
3890 static fc_port_t *qlt_get_port_database(struct scsi_qla_host *vha,
3891         uint16_t loop_id)
3892 {
3893         fc_port_t *fcport;
3894         int rc;
3895
3896         fcport = kzalloc(sizeof(*fcport), GFP_KERNEL);
3897         if (!fcport) {
3898                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf06f,
3899                     "qla_target(%d): Allocation of tmp FC port failed",
3900                     vha->vp_idx);
3901                 return NULL;
3902         }
3903
3904         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf041, "loop_id %d", loop_id);
3905
3906         fcport->loop_id = loop_id;
3907
3908         rc = qla2x00_get_port_database(vha, fcport, 0);
3909         if (rc != QLA_SUCCESS) {
3910                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf070,
3911                     "qla_target(%d): Failed to retrieve fcport "
3912                     "information -- get_port_database() returned %x "
3913                     "(loop_id=0x%04x)", vha->vp_idx, rc, loop_id);
3914                 kfree(fcport);
3915                 return NULL;
3916         }
3917
3918         return fcport;
3919 }
3920
3921 /* Must be called under tgt_mutex */
3922 static struct qla_tgt_sess *qlt_make_local_sess(struct scsi_qla_host *vha,
3923         uint8_t *s_id)
3924 {
3925         struct qla_tgt_sess *sess = NULL;
3926         fc_port_t *fcport = NULL;
3927         int rc, global_resets;
3928         uint16_t loop_id = 0;
3929
3930 retry:
3931         global_resets =
3932             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count);
3933
3934         rc = qla24xx_get_loop_id(vha, s_id, &loop_id);
3935         if (rc != 0) {
3936                 if ((s_id[0] == 0xFF) &&
3937                     (s_id[1] == 0xFC)) {
3938                         /*
3939                          * This is Domain Controller, so it should be
3940                          * OK to drop SCSI commands from it.
3941                          */
3942                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf042,
3943                             "Unable to find initiator with S_ID %x:%x:%x",
3944                             s_id[0], s_id[1], s_id[2]);
3945                 } else
3946                         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf071,
3947                             "qla_target(%d): Unable to find "
3948                             "initiator with S_ID %x:%x:%x",
3949                             vha->vp_idx, s_id[0], s_id[1],
3950                             s_id[2]);
3951                 return NULL;
3952         }
3953
3954         fcport = qlt_get_port_database(vha, loop_id);
3955         if (!fcport)
3956                 return NULL;
3957
3958         if (global_resets !=
3959             atomic_read(&vha->vha_tgt.qla_tgt->tgt_global_resets_count)) {
3960                 ql_dbg(ql_dbg_tgt_mgt, vha, 0xf043,
3961                     "qla_target(%d): global reset during session discovery "
3962                     "(counter was %d, new %d), retrying", vha->vp_idx,
3963                     global_resets,
3964                     atomic_read(&vha->vha_tgt.
3965                         qla_tgt->tgt_global_resets_count));
3966                 goto retry;
3967         }
3968
3969         sess = qlt_create_sess(vha, fcport, true);
3970
3971         kfree(fcport);
3972         return sess;
3973 }
3974
3975 static void qlt_abort_work(struct qla_tgt *tgt,
3976         struct qla_tgt_sess_work_param *prm)
3977 {
3978         struct scsi_qla_host *vha = tgt->vha;
3979         struct qla_hw_data *ha = vha->hw;
3980         struct qla_tgt_sess *sess = NULL;
3981         unsigned long flags;
3982         uint32_t be_s_id;
3983         uint8_t s_id[3];
3984         int rc;
3985
3986         spin_lock_irqsave(&ha->hardware_lock, flags);
3987
3988         if (tgt->tgt_stop)
3989                 goto out_term;
3990
3991         s_id[0] = prm->abts.fcp_hdr_le.s_id[2];
3992         s_id[1] = prm->abts.fcp_hdr_le.s_id[1];
3993         s_id[2] = prm->abts.fcp_hdr_le.s_id[0];
3994
3995         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha,
3996             (unsigned char *)&be_s_id);
3997         if (!sess) {
3998                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
3999
4000                 mutex_lock(&vha->vha_tgt.tgt_mutex);
4001                 sess = qlt_make_local_sess(vha, s_id);
4002                 /* sess has got an extra creation ref */
4003                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4004
4005                 spin_lock_irqsave(&ha->hardware_lock, flags);
4006                 if (!sess)
4007                         goto out_term;
4008         } else {
4009                 kref_get(&sess->se_sess->sess_kref);
4010         }
4011
4012         if (tgt->tgt_stop)
4013                 goto out_term;
4014
4015         rc = __qlt_24xx_handle_abts(vha, &prm->abts, sess);
4016         if (rc != 0)
4017                 goto out_term;
4018
4019         ha->tgt.tgt_ops->put_sess(sess);
4020         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4021         return;
4022
4023 out_term:
4024         qlt_24xx_send_abts_resp(vha, &prm->abts, FCP_TMF_REJECTED, false);
4025         if (sess)
4026                 ha->tgt.tgt_ops->put_sess(sess);
4027         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4028 }
4029
4030 static void qlt_tmr_work(struct qla_tgt *tgt,
4031         struct qla_tgt_sess_work_param *prm)
4032 {
4033         struct atio_from_isp *a = &prm->tm_iocb2;
4034         struct scsi_qla_host *vha = tgt->vha;
4035         struct qla_hw_data *ha = vha->hw;
4036         struct qla_tgt_sess *sess = NULL;
4037         unsigned long flags;
4038         uint8_t *s_id = NULL; /* to hide compiler warnings */
4039         int rc;
4040         uint32_t lun, unpacked_lun;
4041         int lun_size, fn;
4042         void *iocb;
4043
4044         spin_lock_irqsave(&ha->hardware_lock, flags);
4045
4046         if (tgt->tgt_stop)
4047                 goto out_term;
4048
4049         s_id = prm->tm_iocb2.u.isp24.fcp_hdr.s_id;
4050         sess = ha->tgt.tgt_ops->find_sess_by_s_id(vha, s_id);
4051         if (!sess) {
4052                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4053
4054                 mutex_lock(&vha->vha_tgt.tgt_mutex);
4055                 sess = qlt_make_local_sess(vha, s_id);
4056                 /* sess has got an extra creation ref */
4057                 mutex_unlock(&vha->vha_tgt.tgt_mutex);
4058
4059                 spin_lock_irqsave(&ha->hardware_lock, flags);
4060                 if (!sess)
4061                         goto out_term;
4062         } else {
4063                 kref_get(&sess->se_sess->sess_kref);
4064         }
4065
4066         iocb = a;
4067         lun = a->u.isp24.fcp_cmnd.lun;
4068         lun_size = sizeof(lun);
4069         fn = a->u.isp24.fcp_cmnd.task_mgmt_flags;
4070         unpacked_lun = scsilun_to_int((struct scsi_lun *)&lun);
4071
4072         rc = qlt_issue_task_mgmt(sess, unpacked_lun, fn, iocb, 0);
4073         if (rc != 0)
4074                 goto out_term;
4075
4076         ha->tgt.tgt_ops->put_sess(sess);
4077         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4078         return;
4079
4080 out_term:
4081         qlt_send_term_exchange(vha, NULL, &prm->tm_iocb2, 1);
4082         if (sess)
4083                 ha->tgt.tgt_ops->put_sess(sess);
4084         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4085 }
4086
4087 static void qlt_sess_work_fn(struct work_struct *work)
4088 {
4089         struct qla_tgt *tgt = container_of(work, struct qla_tgt, sess_work);
4090         struct scsi_qla_host *vha = tgt->vha;
4091         unsigned long flags;
4092
4093         ql_dbg(ql_dbg_tgt_mgt, vha, 0xf000, "Sess work (tgt %p)", tgt);
4094
4095         spin_lock_irqsave(&tgt->sess_work_lock, flags);
4096         while (!list_empty(&tgt->sess_works_list)) {
4097                 struct qla_tgt_sess_work_param *prm = list_entry(
4098                     tgt->sess_works_list.next, typeof(*prm),
4099                     sess_works_list_entry);
4100
4101                 /*
4102                  * This work can be scheduled on several CPUs at time, so we
4103                  * must delete the entry to eliminate double processing
4104                  */
4105                 list_del(&prm->sess_works_list_entry);
4106
4107                 spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4108
4109                 switch (prm->type) {
4110                 case QLA_TGT_SESS_WORK_ABORT:
4111                         qlt_abort_work(tgt, prm);
4112                         break;
4113                 case QLA_TGT_SESS_WORK_TM:
4114                         qlt_tmr_work(tgt, prm);
4115                         break;
4116                 default:
4117                         BUG_ON(1);
4118                         break;
4119                 }
4120
4121                 spin_lock_irqsave(&tgt->sess_work_lock, flags);
4122
4123                 kfree(prm);
4124         }
4125         spin_unlock_irqrestore(&tgt->sess_work_lock, flags);
4126 }
4127
4128 /* Must be called under tgt_host_action_mutex */
4129 int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
4130 {
4131         struct qla_tgt *tgt;
4132
4133         if (!QLA_TGT_MODE_ENABLED())
4134                 return 0;
4135
4136         if (!IS_TGT_MODE_CAPABLE(ha)) {
4137                 ql_log(ql_log_warn, base_vha, 0xe070,
4138                     "This adapter does not support target mode.\n");
4139                 return 0;
4140         }
4141
4142         ql_dbg(ql_dbg_tgt, base_vha, 0xe03b,
4143             "Registering target for host %ld(%p).\n", base_vha->host_no, ha);
4144
4145         BUG_ON(base_vha->vha_tgt.qla_tgt != NULL);
4146
4147         tgt = kzalloc(sizeof(struct qla_tgt), GFP_KERNEL);
4148         if (!tgt) {
4149                 ql_dbg(ql_dbg_tgt, base_vha, 0xe066,
4150                     "Unable to allocate struct qla_tgt\n");
4151                 return -ENOMEM;
4152         }
4153
4154         if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
4155                 base_vha->host->hostt->supported_mode |= MODE_TARGET;
4156
4157         tgt->ha = ha;
4158         tgt->vha = base_vha;
4159         init_waitqueue_head(&tgt->waitQ);
4160         INIT_LIST_HEAD(&tgt->sess_list);
4161         INIT_LIST_HEAD(&tgt->del_sess_list);
4162         INIT_DELAYED_WORK(&tgt->sess_del_work,
4163                 (void (*)(struct work_struct *))qlt_del_sess_work_fn);
4164         spin_lock_init(&tgt->sess_work_lock);
4165         INIT_WORK(&tgt->sess_work, qlt_sess_work_fn);
4166         INIT_LIST_HEAD(&tgt->sess_works_list);
4167         spin_lock_init(&tgt->srr_lock);
4168         INIT_LIST_HEAD(&tgt->srr_ctio_list);
4169         INIT_LIST_HEAD(&tgt->srr_imm_list);
4170         INIT_WORK(&tgt->srr_work, qlt_handle_srr_work);
4171         atomic_set(&tgt->tgt_global_resets_count, 0);
4172
4173         base_vha->vha_tgt.qla_tgt = tgt;
4174
4175         ql_dbg(ql_dbg_tgt, base_vha, 0xe067,
4176                 "qla_target(%d): using 64 Bit PCI addressing",
4177                 base_vha->vp_idx);
4178         tgt->tgt_enable_64bit_addr = 1;
4179         /* 3 is reserved */
4180         tgt->sg_tablesize = QLA_TGT_MAX_SG_24XX(base_vha->req->length - 3);
4181         tgt->datasegs_per_cmd = QLA_TGT_DATASEGS_PER_CMD_24XX;
4182         tgt->datasegs_per_cont = QLA_TGT_DATASEGS_PER_CONT_24XX;
4183
4184         mutex_lock(&qla_tgt_mutex);
4185         list_add_tail(&tgt->tgt_list_entry, &qla_tgt_glist);
4186         mutex_unlock(&qla_tgt_mutex);
4187
4188         return 0;
4189 }
4190
4191 /* Must be called under tgt_host_action_mutex */
4192 int qlt_remove_target(struct qla_hw_data *ha, struct scsi_qla_host *vha)
4193 {
4194         if (!vha->vha_tgt.qla_tgt)
4195                 return 0;
4196
4197         mutex_lock(&qla_tgt_mutex);
4198         list_del(&vha->vha_tgt.qla_tgt->tgt_list_entry);
4199         mutex_unlock(&qla_tgt_mutex);
4200
4201         ql_dbg(ql_dbg_tgt, vha, 0xe03c, "Unregistering target for host %ld(%p)",
4202             vha->host_no, ha);
4203         qlt_release(vha->vha_tgt.qla_tgt);
4204
4205         return 0;
4206 }
4207
4208 static void qlt_lport_dump(struct scsi_qla_host *vha, u64 wwpn,
4209         unsigned char *b)
4210 {
4211         int i;
4212
4213         pr_debug("qla2xxx HW vha->node_name: ");
4214         for (i = 0; i < WWN_SIZE; i++)
4215                 pr_debug("%02x ", vha->node_name[i]);
4216         pr_debug("\n");
4217         pr_debug("qla2xxx HW vha->port_name: ");
4218         for (i = 0; i < WWN_SIZE; i++)
4219                 pr_debug("%02x ", vha->port_name[i]);
4220         pr_debug("\n");
4221
4222         pr_debug("qla2xxx passed configfs WWPN: ");
4223         put_unaligned_be64(wwpn, b);
4224         for (i = 0; i < WWN_SIZE; i++)
4225                 pr_debug("%02x ", b[i]);
4226         pr_debug("\n");
4227 }
4228
4229 /**
4230  * qla_tgt_lport_register - register lport with external module
4231  *
4232  * @qla_tgt_ops: Pointer for tcm_qla2xxx qla_tgt_ops
4233  * @wwpn: Passwd FC target WWPN
4234  * @callback:  lport initialization callback for tcm_qla2xxx code
4235  * @target_lport_ptr: pointer for tcm_qla2xxx specific lport data
4236  */
4237 int qlt_lport_register(void *target_lport_ptr, u64 phys_wwpn,
4238                        u64 npiv_wwpn, u64 npiv_wwnn,
4239                        int (*callback)(struct scsi_qla_host *, void *, u64, u64))
4240 {
4241         struct qla_tgt *tgt;
4242         struct scsi_qla_host *vha;
4243         struct qla_hw_data *ha;
4244         struct Scsi_Host *host;
4245         unsigned long flags;
4246         int rc;
4247         u8 b[WWN_SIZE];
4248
4249         mutex_lock(&qla_tgt_mutex);
4250         list_for_each_entry(tgt, &qla_tgt_glist, tgt_list_entry) {
4251                 vha = tgt->vha;
4252                 ha = vha->hw;
4253
4254                 host = vha->host;
4255                 if (!host)
4256                         continue;
4257
4258                 if (!(host->hostt->supported_mode & MODE_TARGET))
4259                         continue;
4260
4261                 spin_lock_irqsave(&ha->hardware_lock, flags);
4262                 if ((!npiv_wwpn || !npiv_wwnn) && host->active_mode & MODE_TARGET) {
4263                         pr_debug("MODE_TARGET already active on qla2xxx(%d)\n",
4264                             host->host_no);
4265                         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4266                         continue;
4267                 }
4268                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
4269
4270                 if (!scsi_host_get(host)) {
4271                         ql_dbg(ql_dbg_tgt, vha, 0xe068,
4272                             "Unable to scsi_host_get() for"
4273                             " qla2xxx scsi_host\n");
4274                         continue;
4275                 }
4276                 qlt_lport_dump(vha, phys_wwpn, b);
4277
4278                 if (memcmp(vha->port_name, b, WWN_SIZE)) {
4279                         scsi_host_put(host);
4280                         continue;
4281                 }
4282                 mutex_unlock(&qla_tgt_mutex);
4283
4284                 rc = (*callback)(vha, target_lport_ptr, npiv_wwpn, npiv_wwnn);
4285                 if (rc != 0)
4286                         scsi_host_put(host);
4287
4288                 return rc;
4289         }
4290         mutex_unlock(&qla_tgt_mutex);
4291
4292         return -ENODEV;
4293 }
4294 EXPORT_SYMBOL(qlt_lport_register);
4295
4296 /**
4297  * qla_tgt_lport_deregister - Degister lport
4298  *
4299  * @vha:  Registered scsi_qla_host pointer
4300  */
4301 void qlt_lport_deregister(struct scsi_qla_host *vha)
4302 {
4303         struct qla_hw_data *ha = vha->hw;
4304         struct Scsi_Host *sh = vha->host;
4305         /*
4306          * Clear the target_lport_ptr qla_target_template pointer in qla_hw_data
4307          */
4308         vha->vha_tgt.target_lport_ptr = NULL;
4309         ha->tgt.tgt_ops = NULL;
4310         /*
4311          * Release the Scsi_Host reference for the underlying qla2xxx host
4312          */
4313         scsi_host_put(sh);
4314 }
4315 EXPORT_SYMBOL(qlt_lport_deregister);
4316
4317 /* Must be called under HW lock */
4318 void qlt_set_mode(struct scsi_qla_host *vha)
4319 {
4320         struct qla_hw_data *ha = vha->hw;
4321
4322         switch (ql2x_ini_mode) {
4323         case QLA2XXX_INI_MODE_DISABLED:
4324         case QLA2XXX_INI_MODE_EXCLUSIVE:
4325                 vha->host->active_mode = MODE_TARGET;
4326                 break;
4327         case QLA2XXX_INI_MODE_ENABLED:
4328                 vha->host->active_mode |= MODE_TARGET;
4329                 break;
4330         default:
4331                 break;
4332         }
4333
4334         if (ha->tgt.ini_mode_force_reverse)
4335                 qla_reverse_ini_mode(vha);
4336 }
4337
4338 /* Must be called under HW lock */
4339 void qlt_clear_mode(struct scsi_qla_host *vha)
4340 {
4341         struct qla_hw_data *ha = vha->hw;
4342
4343         switch (ql2x_ini_mode) {
4344         case QLA2XXX_INI_MODE_DISABLED:
4345                 vha->host->active_mode = MODE_UNKNOWN;
4346                 break;
4347         case QLA2XXX_INI_MODE_EXCLUSIVE:
4348                 vha->host->active_mode = MODE_INITIATOR;
4349                 break;
4350         case QLA2XXX_INI_MODE_ENABLED:
4351                 vha->host->active_mode &= ~MODE_TARGET;
4352                 break;
4353         default:
4354                 break;
4355         }
4356
4357         if (ha->tgt.ini_mode_force_reverse)
4358                 qla_reverse_ini_mode(vha);
4359 }
4360
4361 /*
4362  * qla_tgt_enable_vha - NO LOCK HELD
4363  *
4364  * host_reset, bring up w/ Target Mode Enabled
4365  */
4366 void
4367 qlt_enable_vha(struct scsi_qla_host *vha)
4368 {
4369         struct qla_hw_data *ha = vha->hw;
4370         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4371         unsigned long flags;
4372         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
4373
4374         if (!tgt) {
4375                 ql_dbg(ql_dbg_tgt, vha, 0xe069,
4376                     "Unable to locate qla_tgt pointer from"
4377                     " struct qla_hw_data\n");
4378                 dump_stack();
4379                 return;
4380         }
4381
4382         spin_lock_irqsave(&ha->hardware_lock, flags);
4383         tgt->tgt_stopped = 0;
4384         qlt_set_mode(vha);
4385         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4386
4387         if (vha->vp_idx) {
4388                 qla24xx_disable_vp(vha);
4389                 qla24xx_enable_vp(vha);
4390         } else {
4391                 set_bit(ISP_ABORT_NEEDED, &base_vha->dpc_flags);
4392                 qla2xxx_wake_dpc(base_vha);
4393                 qla2x00_wait_for_hba_online(base_vha);
4394         }
4395 }
4396 EXPORT_SYMBOL(qlt_enable_vha);
4397
4398 /*
4399  * qla_tgt_disable_vha - NO LOCK HELD
4400  *
4401  * Disable Target Mode and reset the adapter
4402  */
4403 void
4404 qlt_disable_vha(struct scsi_qla_host *vha)
4405 {
4406         struct qla_hw_data *ha = vha->hw;
4407         struct qla_tgt *tgt = vha->vha_tgt.qla_tgt;
4408         unsigned long flags;
4409
4410         if (!tgt) {
4411                 ql_dbg(ql_dbg_tgt, vha, 0xe06a,
4412                     "Unable to locate qla_tgt pointer from"
4413                     " struct qla_hw_data\n");
4414                 dump_stack();
4415                 return;
4416         }
4417
4418         spin_lock_irqsave(&ha->hardware_lock, flags);
4419         qlt_clear_mode(vha);
4420         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4421
4422         set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
4423         qla2xxx_wake_dpc(vha);
4424         qla2x00_wait_for_hba_online(vha);
4425 }
4426
4427 /*
4428  * Called from qla_init.c:qla24xx_vport_create() contex to setup
4429  * the target mode specific struct scsi_qla_host and struct qla_hw_data
4430  * members.
4431  */
4432 void
4433 qlt_vport_create(struct scsi_qla_host *vha, struct qla_hw_data *ha)
4434 {
4435         if (!qla_tgt_mode_enabled(vha))
4436                 return;
4437
4438         vha->vha_tgt.qla_tgt = NULL;
4439
4440         mutex_init(&vha->vha_tgt.tgt_mutex);
4441         mutex_init(&vha->vha_tgt.tgt_host_action_mutex);
4442
4443         qlt_clear_mode(vha);
4444
4445         /*
4446          * NOTE: Currently the value is kept the same for <24xx and
4447          * >=24xx ISPs. If it is necessary to change it,
4448          * the check should be added for specific ISPs,
4449          * assigning the value appropriately.
4450          */
4451         ha->tgt.atio_q_length = ATIO_ENTRY_CNT_24XX;
4452
4453         qlt_add_target(ha, vha);
4454 }
4455
4456 void
4457 qlt_rff_id(struct scsi_qla_host *vha, struct ct_sns_req *ct_req)
4458 {
4459         /*
4460          * FC-4 Feature bit 0 indicates target functionality to the name server.
4461          */
4462         if (qla_tgt_mode_enabled(vha)) {
4463                 if (qla_ini_mode_enabled(vha))
4464                         ct_req->req.rff_id.fc4_feature = BIT_0 | BIT_1;
4465                 else
4466                         ct_req->req.rff_id.fc4_feature = BIT_0;
4467         } else if (qla_ini_mode_enabled(vha)) {
4468                 ct_req->req.rff_id.fc4_feature = BIT_1;
4469         }
4470 }
4471
4472 /*
4473  * qlt_init_atio_q_entries() - Initializes ATIO queue entries.
4474  * @ha: HA context
4475  *
4476  * Beginning of ATIO ring has initialization control block already built
4477  * by nvram config routine.
4478  *
4479  * Returns 0 on success.
4480  */
4481 void
4482 qlt_init_atio_q_entries(struct scsi_qla_host *vha)
4483 {
4484         struct qla_hw_data *ha = vha->hw;
4485         uint16_t cnt;
4486         struct atio_from_isp *pkt = (struct atio_from_isp *)ha->tgt.atio_ring;
4487
4488         if (!qla_tgt_mode_enabled(vha))
4489                 return;
4490
4491         for (cnt = 0; cnt < ha->tgt.atio_q_length; cnt++) {
4492                 pkt->u.raw.signature = ATIO_PROCESSED;
4493                 pkt++;
4494         }
4495
4496 }
4497
4498 /*
4499  * qlt_24xx_process_atio_queue() - Process ATIO queue entries.
4500  * @ha: SCSI driver HA context
4501  */
4502 void
4503 qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
4504 {
4505         struct qla_hw_data *ha = vha->hw;
4506         struct atio_from_isp *pkt;
4507         int cnt, i;
4508
4509         if (!vha->flags.online)
4510                 return;
4511
4512         while (ha->tgt.atio_ring_ptr->signature != ATIO_PROCESSED) {
4513                 pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4514                 cnt = pkt->u.raw.entry_count;
4515
4516                 qlt_24xx_atio_pkt_all_vps(vha, (struct atio_from_isp *)pkt);
4517
4518                 for (i = 0; i < cnt; i++) {
4519                         ha->tgt.atio_ring_index++;
4520                         if (ha->tgt.atio_ring_index == ha->tgt.atio_q_length) {
4521                                 ha->tgt.atio_ring_index = 0;
4522                                 ha->tgt.atio_ring_ptr = ha->tgt.atio_ring;
4523                         } else
4524                                 ha->tgt.atio_ring_ptr++;
4525
4526                         pkt->u.raw.signature = ATIO_PROCESSED;
4527                         pkt = (struct atio_from_isp *)ha->tgt.atio_ring_ptr;
4528                 }
4529                 wmb();
4530         }
4531
4532         /* Adjust ring index */
4533         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
4534 }
4535
4536 void
4537 qlt_24xx_config_rings(struct scsi_qla_host *vha)
4538 {
4539         struct qla_hw_data *ha = vha->hw;
4540         if (!QLA_TGT_MODE_ENABLED())
4541                 return;
4542
4543         WRT_REG_DWORD(ISP_ATIO_Q_IN(vha), 0);
4544         WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), 0);
4545         RD_REG_DWORD(ISP_ATIO_Q_OUT(vha));
4546
4547         if (IS_ATIO_MSIX_CAPABLE(ha)) {
4548                 struct qla_msix_entry *msix = &ha->msix_entries[2];
4549                 struct init_cb_24xx *icb = (struct init_cb_24xx *)ha->init_cb;
4550
4551                 icb->msix_atio = cpu_to_le16(msix->entry);
4552                 ql_dbg(ql_dbg_init, vha, 0xf072,
4553                     "Registering ICB vector 0x%x for atio que.\n",
4554                     msix->entry);
4555         }
4556 }
4557
4558 void
4559 qlt_24xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_24xx *nv)
4560 {
4561         struct qla_hw_data *ha = vha->hw;
4562
4563         if (qla_tgt_mode_enabled(vha)) {
4564                 if (!ha->tgt.saved_set) {
4565                         /* We save only once */
4566                         ha->tgt.saved_exchange_count = nv->exchange_count;
4567                         ha->tgt.saved_firmware_options_1 =
4568                             nv->firmware_options_1;
4569                         ha->tgt.saved_firmware_options_2 =
4570                             nv->firmware_options_2;
4571                         ha->tgt.saved_firmware_options_3 =
4572                             nv->firmware_options_3;
4573                         ha->tgt.saved_set = 1;
4574                 }
4575
4576                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4577
4578                 /* Enable target mode */
4579                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4580
4581                 /* Disable ini mode, if requested */
4582                 if (!qla_ini_mode_enabled(vha))
4583                         nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_5);
4584
4585                 /* Disable Full Login after LIP */
4586                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4587                 /* Enable initial LIP */
4588                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4589                 /* Enable FC tapes support */
4590                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4591                 /* Disable Full Login after LIP */
4592                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4593                 /* Enable target PRLI control */
4594                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4595         } else {
4596                 if (ha->tgt.saved_set) {
4597                         nv->exchange_count = ha->tgt.saved_exchange_count;
4598                         nv->firmware_options_1 =
4599                             ha->tgt.saved_firmware_options_1;
4600                         nv->firmware_options_2 =
4601                             ha->tgt.saved_firmware_options_2;
4602                         nv->firmware_options_3 =
4603                             ha->tgt.saved_firmware_options_3;
4604                 }
4605                 return;
4606         }
4607
4608         /* out-of-order frames reassembly */
4609         nv->firmware_options_3 |= BIT_6|BIT_9;
4610
4611         if (ha->tgt.enable_class_2) {
4612                 if (vha->flags.init_done)
4613                         fc_host_supported_classes(vha->host) =
4614                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4615
4616                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4617         } else {
4618                 if (vha->flags.init_done)
4619                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4620
4621                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4622         }
4623 }
4624
4625 void
4626 qlt_24xx_config_nvram_stage2(struct scsi_qla_host *vha,
4627         struct init_cb_24xx *icb)
4628 {
4629         struct qla_hw_data *ha = vha->hw;
4630
4631         if (ha->tgt.node_name_set) {
4632                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4633                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4634         }
4635 }
4636
4637 void
4638 qlt_81xx_config_nvram_stage1(struct scsi_qla_host *vha, struct nvram_81xx *nv)
4639 {
4640         struct qla_hw_data *ha = vha->hw;
4641
4642         if (!QLA_TGT_MODE_ENABLED())
4643                 return;
4644
4645         if (qla_tgt_mode_enabled(vha)) {
4646                 if (!ha->tgt.saved_set) {
4647                         /* We save only once */
4648                         ha->tgt.saved_exchange_count = nv->exchange_count;
4649                         ha->tgt.saved_firmware_options_1 =
4650                             nv->firmware_options_1;
4651                         ha->tgt.saved_firmware_options_2 =
4652                             nv->firmware_options_2;
4653                         ha->tgt.saved_firmware_options_3 =
4654                             nv->firmware_options_3;
4655                         ha->tgt.saved_set = 1;
4656                 }
4657
4658                 nv->exchange_count = __constant_cpu_to_le16(0xFFFF);
4659
4660                 /* Enable target mode */
4661                 nv->firmware_options_1 |= __constant_cpu_to_le32(BIT_4);
4662
4663                 /* Disable ini mode, if requested */
4664                 if (!qla_ini_mode_enabled(vha))
4665                         nv->firmware_options_1 |=
4666                             __constant_cpu_to_le32(BIT_5);
4667
4668                 /* Disable Full Login after LIP */
4669                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_13);
4670                 /* Enable initial LIP */
4671                 nv->firmware_options_1 &= __constant_cpu_to_le32(~BIT_9);
4672                 /* Enable FC tapes support */
4673                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_12);
4674                 /* Disable Full Login after LIP */
4675                 nv->host_p &= __constant_cpu_to_le32(~BIT_10);
4676                 /* Enable target PRLI control */
4677                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_14);
4678         } else {
4679                 if (ha->tgt.saved_set) {
4680                         nv->exchange_count = ha->tgt.saved_exchange_count;
4681                         nv->firmware_options_1 =
4682                             ha->tgt.saved_firmware_options_1;
4683                         nv->firmware_options_2 =
4684                             ha->tgt.saved_firmware_options_2;
4685                         nv->firmware_options_3 =
4686                             ha->tgt.saved_firmware_options_3;
4687                 }
4688                 return;
4689         }
4690
4691         /* out-of-order frames reassembly */
4692         nv->firmware_options_3 |= BIT_6|BIT_9;
4693
4694         if (ha->tgt.enable_class_2) {
4695                 if (vha->flags.init_done)
4696                         fc_host_supported_classes(vha->host) =
4697                                 FC_COS_CLASS2 | FC_COS_CLASS3;
4698
4699                 nv->firmware_options_2 |= __constant_cpu_to_le32(BIT_8);
4700         } else {
4701                 if (vha->flags.init_done)
4702                         fc_host_supported_classes(vha->host) = FC_COS_CLASS3;
4703
4704                 nv->firmware_options_2 &= ~__constant_cpu_to_le32(BIT_8);
4705         }
4706 }
4707
4708 void
4709 qlt_81xx_config_nvram_stage2(struct scsi_qla_host *vha,
4710         struct init_cb_81xx *icb)
4711 {
4712         struct qla_hw_data *ha = vha->hw;
4713
4714         if (!QLA_TGT_MODE_ENABLED())
4715                 return;
4716
4717         if (ha->tgt.node_name_set) {
4718                 memcpy(icb->node_name, ha->tgt.tgt_node_name, WWN_SIZE);
4719                 icb->firmware_options_1 |= __constant_cpu_to_le32(BIT_14);
4720         }
4721 }
4722
4723 void
4724 qlt_83xx_iospace_config(struct qla_hw_data *ha)
4725 {
4726         if (!QLA_TGT_MODE_ENABLED())
4727                 return;
4728
4729         ha->msix_count += 1; /* For ATIO Q */
4730 }
4731
4732 int
4733 qlt_24xx_process_response_error(struct scsi_qla_host *vha,
4734         struct sts_entry_24xx *pkt)
4735 {
4736         switch (pkt->entry_type) {
4737         case ABTS_RECV_24XX:
4738         case ABTS_RESP_24XX:
4739         case CTIO_TYPE7:
4740         case NOTIFY_ACK_TYPE:
4741                 return 1;
4742         default:
4743                 return 0;
4744         }
4745 }
4746
4747 void
4748 qlt_modify_vp_config(struct scsi_qla_host *vha,
4749         struct vp_config_entry_24xx *vpmod)
4750 {
4751         if (qla_tgt_mode_enabled(vha))
4752                 vpmod->options_idx1 &= ~BIT_5;
4753         /* Disable ini mode, if requested */
4754         if (!qla_ini_mode_enabled(vha))
4755                 vpmod->options_idx1 &= ~BIT_4;
4756 }
4757
4758 void
4759 qlt_probe_one_stage1(struct scsi_qla_host *base_vha, struct qla_hw_data *ha)
4760 {
4761         if (!QLA_TGT_MODE_ENABLED())
4762                 return;
4763
4764         if  (ha->mqenable || IS_QLA83XX(ha)) {
4765                 ISP_ATIO_Q_IN(base_vha) = &ha->mqiobase->isp25mq.atio_q_in;
4766                 ISP_ATIO_Q_OUT(base_vha) = &ha->mqiobase->isp25mq.atio_q_out;
4767         } else {
4768                 ISP_ATIO_Q_IN(base_vha) = &ha->iobase->isp24.atio_q_in;
4769                 ISP_ATIO_Q_OUT(base_vha) = &ha->iobase->isp24.atio_q_out;
4770         }
4771
4772         mutex_init(&base_vha->vha_tgt.tgt_mutex);
4773         mutex_init(&base_vha->vha_tgt.tgt_host_action_mutex);
4774         qlt_clear_mode(base_vha);
4775 }
4776
4777 irqreturn_t
4778 qla83xx_msix_atio_q(int irq, void *dev_id)
4779 {
4780         struct rsp_que *rsp;
4781         scsi_qla_host_t *vha;
4782         struct qla_hw_data *ha;
4783         unsigned long flags;
4784
4785         rsp = (struct rsp_que *) dev_id;
4786         ha = rsp->hw;
4787         vha = pci_get_drvdata(ha->pdev);
4788
4789         spin_lock_irqsave(&ha->hardware_lock, flags);
4790
4791         qlt_24xx_process_atio_queue(vha);
4792         qla24xx_process_response_queue(vha, rsp);
4793
4794         spin_unlock_irqrestore(&ha->hardware_lock, flags);
4795
4796         return IRQ_HANDLED;
4797 }
4798
4799 int
4800 qlt_mem_alloc(struct qla_hw_data *ha)
4801 {
4802         if (!QLA_TGT_MODE_ENABLED())
4803                 return 0;
4804
4805         ha->tgt.tgt_vp_map = kzalloc(sizeof(struct qla_tgt_vp_map) *
4806             MAX_MULTI_ID_FABRIC, GFP_KERNEL);
4807         if (!ha->tgt.tgt_vp_map)
4808                 return -ENOMEM;
4809
4810         ha->tgt.atio_ring = dma_alloc_coherent(&ha->pdev->dev,
4811             (ha->tgt.atio_q_length + 1) * sizeof(struct atio_from_isp),
4812             &ha->tgt.atio_dma, GFP_KERNEL);
4813         if (!ha->tgt.atio_ring) {
4814                 kfree(ha->tgt.tgt_vp_map);
4815                 return -ENOMEM;
4816         }
4817         return 0;
4818 }
4819
4820 void
4821 qlt_mem_free(struct qla_hw_data *ha)
4822 {
4823         if (!QLA_TGT_MODE_ENABLED())
4824                 return;
4825
4826         if (ha->tgt.atio_ring) {
4827                 dma_free_coherent(&ha->pdev->dev, (ha->tgt.atio_q_length + 1) *
4828                     sizeof(struct atio_from_isp), ha->tgt.atio_ring,
4829                     ha->tgt.atio_dma);
4830         }
4831         kfree(ha->tgt.tgt_vp_map);
4832 }
4833
4834 /* vport_slock to be held by the caller */
4835 void
4836 qlt_update_vp_map(struct scsi_qla_host *vha, int cmd)
4837 {
4838         if (!QLA_TGT_MODE_ENABLED())
4839                 return;
4840
4841         switch (cmd) {
4842         case SET_VP_IDX:
4843                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = vha;
4844                 break;
4845         case SET_AL_PA:
4846                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = vha->vp_idx;
4847                 break;
4848         case RESET_VP_IDX:
4849                 vha->hw->tgt.tgt_vp_map[vha->vp_idx].vha = NULL;
4850                 break;
4851         case RESET_AL_PA:
4852                 vha->hw->tgt.tgt_vp_map[vha->d_id.b.al_pa].idx = 0;
4853                 break;
4854         }
4855 }
4856
4857 static int __init qlt_parse_ini_mode(void)
4858 {
4859         if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_EXCLUSIVE) == 0)
4860                 ql2x_ini_mode = QLA2XXX_INI_MODE_EXCLUSIVE;
4861         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_DISABLED) == 0)
4862                 ql2x_ini_mode = QLA2XXX_INI_MODE_DISABLED;
4863         else if (strcasecmp(qlini_mode, QLA2XXX_INI_MODE_STR_ENABLED) == 0)
4864                 ql2x_ini_mode = QLA2XXX_INI_MODE_ENABLED;
4865         else
4866                 return false;
4867
4868         return true;
4869 }
4870
4871 int __init qlt_init(void)
4872 {
4873         int ret;
4874
4875         if (!qlt_parse_ini_mode()) {
4876                 ql_log(ql_log_fatal, NULL, 0xe06b,
4877                     "qlt_parse_ini_mode() failed\n");
4878                 return -EINVAL;
4879         }
4880
4881         if (!QLA_TGT_MODE_ENABLED())
4882                 return 0;
4883
4884         qla_tgt_cmd_cachep = kmem_cache_create("qla_tgt_cmd_cachep",
4885             sizeof(struct qla_tgt_cmd), __alignof__(struct qla_tgt_cmd), 0,
4886             NULL);
4887         if (!qla_tgt_cmd_cachep) {
4888                 ql_log(ql_log_fatal, NULL, 0xe06c,
4889                     "kmem_cache_create for qla_tgt_cmd_cachep failed\n");
4890                 return -ENOMEM;
4891         }
4892
4893         qla_tgt_mgmt_cmd_cachep = kmem_cache_create("qla_tgt_mgmt_cmd_cachep",
4894             sizeof(struct qla_tgt_mgmt_cmd), __alignof__(struct
4895             qla_tgt_mgmt_cmd), 0, NULL);
4896         if (!qla_tgt_mgmt_cmd_cachep) {
4897                 ql_log(ql_log_fatal, NULL, 0xe06d,
4898                     "kmem_cache_create for qla_tgt_mgmt_cmd_cachep failed\n");
4899                 ret = -ENOMEM;
4900                 goto out;
4901         }
4902
4903         qla_tgt_mgmt_cmd_mempool = mempool_create(25, mempool_alloc_slab,
4904             mempool_free_slab, qla_tgt_mgmt_cmd_cachep);
4905         if (!qla_tgt_mgmt_cmd_mempool) {
4906                 ql_log(ql_log_fatal, NULL, 0xe06e,
4907                     "mempool_create for qla_tgt_mgmt_cmd_mempool failed\n");
4908                 ret = -ENOMEM;
4909                 goto out_mgmt_cmd_cachep;
4910         }
4911
4912         qla_tgt_wq = alloc_workqueue("qla_tgt_wq", 0, 0);
4913         if (!qla_tgt_wq) {
4914                 ql_log(ql_log_fatal, NULL, 0xe06f,
4915                     "alloc_workqueue for qla_tgt_wq failed\n");
4916                 ret = -ENOMEM;
4917                 goto out_cmd_mempool;
4918         }
4919         /*
4920          * Return 1 to signal that initiator-mode is being disabled
4921          */
4922         return (ql2x_ini_mode == QLA2XXX_INI_MODE_DISABLED) ? 1 : 0;
4923
4924 out_cmd_mempool:
4925         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4926 out_mgmt_cmd_cachep:
4927         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4928 out:
4929         kmem_cache_destroy(qla_tgt_cmd_cachep);
4930         return ret;
4931 }
4932
4933 void qlt_exit(void)
4934 {
4935         if (!QLA_TGT_MODE_ENABLED())
4936                 return;
4937
4938         destroy_workqueue(qla_tgt_wq);
4939         mempool_destroy(qla_tgt_mgmt_cmd_mempool);
4940         kmem_cache_destroy(qla_tgt_mgmt_cmd_cachep);
4941         kmem_cache_destroy(qla_tgt_cmd_cachep);
4942 }