drivers/scsi/qla2xxx/tcm_qla2xxx.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*******************************************************************************
   3  * This file contains tcm implementation using v4 configfs fabric infrastructure
   4  * for QLogic target mode HBAs
   5  *
   6  * (c) Copyright 2010-2013 Datera, Inc.
   7  *
   8  * Author: Nicholas A. Bellinger <nab@daterainc.com>
   9  *
  10  * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
  11  * the TCM_FC / Open-FCoE.org fabric module.
  12  *
  13  * Copyright (c) 2010 Cisco Systems, Inc
  14  *
  15  ****************************************************************************/
  16
  17
  18 #include <linux/module.h>
  19 #include <linux/utsname.h>
  20 #include <linux/vmalloc.h>
  21 #include <linux/list.h>
  22 #include <linux/slab.h>
  23 #include <linux/types.h>
  24 #include <linux/string.h>
  25 #include <linux/configfs.h>
  26 #include <linux/ctype.h>
  27 #include <asm/unaligned.h>
  28 #include <scsi/scsi_host.h>
  29 #include <target/target_core_base.h>
  30 #include <target/target_core_fabric.h>
  31
  32 #include "qla_def.h"
  33 #include "qla_target.h"
  34 #include "tcm_qla2xxx.h"
  35
  36 static struct workqueue_struct *tcm_qla2xxx_free_wq;
  37
  38 /*
  39  * Parse WWN.
  40  * If strict, we require lower-case hex and colon separators to be sure
  41  * the name is the same as what would be generated by ft_format_wwn()
  42  * so the name and wwn are mapped one-to-one.
  43  */
  44 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
  45 {
  46         const char *cp;
  47         char c;
  48         u32 nibble;
  49         u32 byte = 0;
  50         u32 pos = 0;
  51         u32 err;
  52
  53         *wwn = 0;
  54         for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
  55                 c = *cp;
  56                 if (c == '\n' && cp[1] == '\0')
  57                         continue;
  58                 if (strict && pos++ == 2 && byte++ < 7) {
  59                         pos = 0;
  60                         if (c == ':')
  61                                 continue;
  62                         err = 1;
  63                         goto fail;
  64                 }
  65                 if (c == '\0') {
  66                         err = 2;
  67                         if (strict && byte != 8)
  68                                 goto fail;
  69                         return cp - name;
  70                 }
  71                 err = 3;
  72                 if (isdigit(c))
  73                         nibble = c - '0';
  74                 else if (isxdigit(c) && (islower(c) || !strict))
  75                         nibble = tolower(c) - 'a' + 10;
  76                 else
  77                         goto fail;
  78                 *wwn = (*wwn << 4) | nibble;
  79         }
  80         err = 4;
  81 fail:
  82         pr_debug("err %u len %zu pos %u byte %u\n",
  83                         err, cp - name, pos, byte);
  84         return -1;
  85 }
  86
  87 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
  88 {
  89         u8 b[8];
  90
  91         put_unaligned_be64(wwn, b);
  92         return snprintf(buf, len,
  93                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
  94                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
  95 }
  96
  97 /*
  98  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
  99  */
 100 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
 101 {
 102         unsigned int i, j;
 103         u8 wwn[8];
 104
 105         memset(wwn, 0, sizeof(wwn));
 106
 107         /* Validate and store the new name */
 108         for (i = 0, j = 0; i < 16; i++) {
 109                 int value;
 110
 111                 value = hex_to_bin(*ns++);
 112                 if (value >= 0)
 113                         j = (j << 4) | value;
 114                 else
 115                         return -EINVAL;
 116
 117                 if (i % 2) {
 118                         wwn[i/2] = j & 0xff;
 119                         j = 0;
 120                 }
 121         }
 122
 123         *nm = wwn_to_u64(wwn);
 124         return 0;
 125 }
 126
 127 /*
 128  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 129  * store_fc_host_vport_create()
 130  */
 131 static int tcm_qla2xxx_npiv_parse_wwn(
 132         const char *name,
 133         size_t count,
 134         u64 *wwpn,
 135         u64 *wwnn)
 136 {
 137         unsigned int cnt = count;
 138         int rc;
 139
 140         *wwpn = 0;
 141         *wwnn = 0;
 142
 143         /* count may include a LF at end of string */
 144         if (name[cnt-1] == '\n' || name[cnt-1] == 0)
 145                 cnt--;
 146
 147         /* validate we have enough characters for WWPN */
 148         if ((cnt != (16+1+16)) || (name[16] != ':'))
 149                 return -EINVAL;
 150
 151         rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
 152         if (rc != 0)
 153                 return rc;
 154
 155         rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
 156         if (rc != 0)
 157                 return rc;
 158
 159         return 0;
 160 }
 161
 162 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
 163 {
 164         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 165                                 struct tcm_qla2xxx_tpg, se_tpg);
 166         struct tcm_qla2xxx_lport *lport = tpg->lport;
 167
 168         return lport->lport_naa_name;
 169 }
 170
 171 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
 172 {
 173         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 174                                 struct tcm_qla2xxx_tpg, se_tpg);
 175         return tpg->lport_tpgt;
 176 }
 177
 178 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
 179 {
 180         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 181                                 struct tcm_qla2xxx_tpg, se_tpg);
 182
 183         return tpg->tpg_attrib.generate_node_acls;
 184 }
 185
 186 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
 187 {
 188         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 189                                 struct tcm_qla2xxx_tpg, se_tpg);
 190
 191         return tpg->tpg_attrib.cache_dynamic_acls;
 192 }
 193
 194 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
 195 {
 196         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 197                                 struct tcm_qla2xxx_tpg, se_tpg);
 198
 199         return tpg->tpg_attrib.demo_mode_write_protect;
 200 }
 201
 202 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
 203 {
 204         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 205                                 struct tcm_qla2xxx_tpg, se_tpg);
 206
 207         return tpg->tpg_attrib.prod_mode_write_protect;
 208 }
 209
 210 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
 211 {
 212         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 213                                 struct tcm_qla2xxx_tpg, se_tpg);
 214
 215         return tpg->tpg_attrib.demo_mode_login_only;
 216 }
 217
 218 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
 219 {
 220         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 221                                 struct tcm_qla2xxx_tpg, se_tpg);
 222
 223         return tpg->tpg_attrib.fabric_prot_type;
 224 }
 225
 226 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
 227 {
 228         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 229                                 struct tcm_qla2xxx_tpg, se_tpg);
 230
 231         return tpg->lport_tpgt;
 232 }
 233
 234 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
 235 {
 236         struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
 237                         struct qla_tgt_mgmt_cmd, free_work);
 238
 239         transport_generic_free_cmd(&mcmd->se_cmd, 0);
 240 }
 241
 242 /*
 243  * Called from qla_target_template->free_mcmd(), and will call
 244  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 245  * release callback.  qla_hw_data->hardware_lock is expected to be held
 246  */
 247 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
 248 {
 249         if (!mcmd)
 250                 return;
 251         INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
 252         queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
 253 }
 254
 255 static void tcm_qla2xxx_complete_free(struct work_struct *work)
 256 {
 257         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 258
 259         cmd->cmd_in_wq = 0;
 260
 261         WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
 262
 263         /* To do: protect all tgt_counters manipulations with proper locking. */
 264         cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
 265         cmd->trc_flags |= TRC_CMD_FREE;
 266         cmd->cmd_sent_to_fw = 0;
 267
 268         transport_generic_free_cmd(&cmd->se_cmd, 0);
 269 }
 270
 271 static struct qla_tgt_cmd *tcm_qla2xxx_get_cmd(struct fc_port *sess)
 272 {
 273         struct se_session *se_sess = sess->se_sess;
 274         struct qla_tgt_cmd *cmd;
 275         int tag, cpu;
 276
 277         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
 278         if (tag < 0)
 279                 return NULL;
 280
 281         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
 282         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
 283         cmd->se_cmd.map_tag = tag;
 284         cmd->se_cmd.map_cpu = cpu;
 285
 286         return cmd;
 287 }
 288
 289 static void tcm_qla2xxx_rel_cmd(struct qla_tgt_cmd *cmd)
 290 {
 291         target_free_tag(cmd->sess->se_sess, &cmd->se_cmd);
 292 }
 293
 294 /*
 295  * Called from qla_target_template->free_cmd(), and will call
 296  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 297  * release callback.  qla_hw_data->hardware_lock is expected to be held
 298  */
 299 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 300 {
 301         cmd->qpair->tgt_counters.core_qla_free_cmd++;
 302         cmd->cmd_in_wq = 1;
 303
 304         WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
 305         cmd->trc_flags |= TRC_CMD_DONE;
 306
 307         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 308         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 309 }
 310
 311 /*
 312  * Called from struct target_core_fabric_ops->check_stop_free() context
 313  */
 314 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 315 {
 316         struct qla_tgt_cmd *cmd;
 317
 318         if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 319                 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 320                 cmd->trc_flags |= TRC_CMD_CHK_STOP;
 321         }
 322
 323         return target_put_sess_cmd(se_cmd);
 324 }
 325
 326 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 327  * fabric descriptor @se_cmd command to release
 328  */
 329 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 330 {
 331         struct qla_tgt_cmd *cmd;
 332
 333         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 334                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 335                                 struct qla_tgt_mgmt_cmd, se_cmd);
 336                 qlt_free_mcmd(mcmd);
 337                 return;
 338         }
 339         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 340
 341         if (WARN_ON(cmd->cmd_sent_to_fw))
 342                 return;
 343
 344         qlt_free_cmd(cmd);
 345 }
 346
 347 static void tcm_qla2xxx_release_session(struct kref *kref)
 348 {
 349         struct fc_port  *sess = container_of(kref,
 350             struct fc_port, sess_kref);
 351
 352         qlt_unreg_sess(sess);
 353 }
 354
 355 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
 356 {
 357         if (!sess)
 358                 return;
 359
 360         kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
 361 }
 362
 363 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 364 {
 365         struct fc_port *sess = se_sess->fabric_sess_ptr;
 366         struct scsi_qla_host *vha;
 367         unsigned long flags;
 368
 369         BUG_ON(!sess);
 370         vha = sess->vha;
 371
 372         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 373         target_sess_cmd_list_set_waiting(se_sess);
 374         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 375
 376         sess->explicit_logout = 1;
 377         tcm_qla2xxx_put_sess(sess);
 378 }
 379
 380 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 381 {
 382         return 0;
 383 }
 384
 385 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 386 {
 387         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 388                                 struct qla_tgt_cmd, se_cmd);
 389
 390         if (cmd->aborted) {
 391                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 392                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 393                  * already kick start the free.
 394                  */
 395                 pr_debug("write_pending aborted cmd[%p] refcount %d "
 396                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 397                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 398                         cmd->se_cmd.transport_state,
 399                         cmd->se_cmd.t_state,
 400                         cmd->se_cmd.se_cmd_flags);
 401                 transport_generic_request_failure(&cmd->se_cmd,
 402                         TCM_CHECK_CONDITION_ABORT_CMD);
 403                 return 0;
 404         }
 405         cmd->trc_flags |= TRC_XFR_RDY;
 406         cmd->bufflen = se_cmd->data_length;
 407         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 408
 409         cmd->sg_cnt = se_cmd->t_data_nents;
 410         cmd->sg = se_cmd->t_data_sg;
 411
 412         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 413         cmd->prot_sg = se_cmd->t_prot_sg;
 414         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 415         se_cmd->pi_err = 0;
 416
 417         /*
 418          * qla_target.c:qlt_rdy_to_xfer() will call dma_map_sg() to setup
 419          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 420          */
 421         return qlt_rdy_to_xfer(cmd);
 422 }
 423
 424 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 425 {
 426         return;
 427 }
 428
 429 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 430 {
 431         if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
 432                 struct qla_tgt_cmd *cmd = container_of(se_cmd,
 433                                 struct qla_tgt_cmd, se_cmd);
 434                 return cmd->state;
 435         }
 436
 437         return 0;
 438 }
 439
 440 /*
 441  * Called from process context in qla_target.c:qlt_do_work() code
 442  */
 443 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 444         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 445         int data_dir, int bidi)
 446 {
 447         struct se_cmd *se_cmd = &cmd->se_cmd;
 448         struct se_session *se_sess;
 449         struct fc_port *sess;
 450 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 451         struct se_portal_group *se_tpg;
 452         struct tcm_qla2xxx_tpg *tpg;
 453 #endif
 454         int flags = TARGET_SCF_ACK_KREF;
 455
 456         if (bidi)
 457                 flags |= TARGET_SCF_BIDI_OP;
 458
 459         if (se_cmd->cpuid != WORK_CPU_UNBOUND)
 460                 flags |= TARGET_SCF_USE_CPUID;
 461
 462         sess = cmd->sess;
 463         if (!sess) {
 464                 pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
 465                 return -EINVAL;
 466         }
 467
 468         se_sess = sess->se_sess;
 469         if (!se_sess) {
 470                 pr_err("Unable to locate active struct se_session\n");
 471                 return -EINVAL;
 472         }
 473
 474 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 475         se_tpg = se_sess->se_tpg;
 476         tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
 477         if (unlikely(tpg->tpg_attrib.jam_host)) {
 478                 /* return, and dont run target_submit_cmd,discarding command */
 479                 return 0;
 480         }
 481 #endif
 482
 483         cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
 484         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 485                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 486                                 data_dir, flags);
 487 }
 488
 489 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 490 {
 491         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 492
 493         /*
 494          * Ensure that the complete FCP WRITE payload has been received.
 495          * Otherwise return an exception via CHECK_CONDITION status.
 496          */
 497         cmd->cmd_in_wq = 0;
 498         cmd->cmd_sent_to_fw = 0;
 499         if (cmd->aborted) {
 500                 transport_generic_request_failure(&cmd->se_cmd,
 501                         TCM_CHECK_CONDITION_ABORT_CMD);
 502                 return;
 503         }
 504
 505         cmd->qpair->tgt_counters.qla_core_ret_ctio++;
 506         if (!cmd->write_data_transferred) {
 507                 switch (cmd->dif_err_code) {
 508                 case DIF_ERR_GRD:
 509                         cmd->se_cmd.pi_err =
 510                             TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
 511                         break;
 512                 case DIF_ERR_REF:
 513                         cmd->se_cmd.pi_err =
 514                             TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
 515                         break;
 516                 case DIF_ERR_APP:
 517                         cmd->se_cmd.pi_err =
 518                             TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
 519                         break;
 520                 case DIF_ERR_NONE:
 521                 default:
 522                         break;
 523                 }
 524
 525                 if (cmd->se_cmd.pi_err)
 526                         transport_generic_request_failure(&cmd->se_cmd,
 527                                 cmd->se_cmd.pi_err);
 528                 else
 529                         transport_generic_request_failure(&cmd->se_cmd,
 530                                 TCM_CHECK_CONDITION_ABORT_CMD);
 531
 532                 return;
 533         }
 534
 535         return target_execute_cmd(&cmd->se_cmd);
 536 }
 537
 538 /*
 539  * Called from qla_target.c:qlt_do_ctio_completion()
 540  */
 541 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 542 {
 543         cmd->trc_flags |= TRC_DATA_IN;
 544         cmd->cmd_in_wq = 1;
 545         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 546         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 547 }
 548
 549 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
 550 {
 551         return 0;
 552 }
 553
 554 static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
 555     uint16_t *pfw_prot_opts)
 556 {
 557         struct se_cmd *se_cmd = &cmd->se_cmd;
 558
 559         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
 560                 *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
 561
 562         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
 563                 *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
 564
 565         return 0;
 566 }
 567
 568 /*
 569  * Called from qla_target.c:qlt_issue_task_mgmt()
 570  */
 571 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
 572         uint16_t tmr_func, uint32_t tag)
 573 {
 574         struct fc_port *sess = mcmd->sess;
 575         struct se_cmd *se_cmd = &mcmd->se_cmd;
 576         int transl_tmr_func = 0;
 577         int flags = TARGET_SCF_ACK_KREF;
 578
 579         switch (tmr_func) {
 580         case QLA_TGT_ABTS:
 581                 pr_debug("%ld: ABTS received\n", sess->vha->host_no);
 582                 transl_tmr_func = TMR_ABORT_TASK;
 583                 flags |= TARGET_SCF_LOOKUP_LUN_FROM_TAG;
 584                 break;
 585         case QLA_TGT_2G_ABORT_TASK:
 586                 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
 587                 transl_tmr_func = TMR_ABORT_TASK;
 588                 break;
 589         case QLA_TGT_CLEAR_ACA:
 590                 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
 591                 transl_tmr_func = TMR_CLEAR_ACA;
 592                 break;
 593         case QLA_TGT_TARGET_RESET:
 594                 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
 595                 transl_tmr_func = TMR_TARGET_WARM_RESET;
 596                 break;
 597         case QLA_TGT_LUN_RESET:
 598                 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
 599                 transl_tmr_func = TMR_LUN_RESET;
 600                 break;
 601         case QLA_TGT_CLEAR_TS:
 602                 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
 603                 transl_tmr_func = TMR_CLEAR_TASK_SET;
 604                 break;
 605         case QLA_TGT_ABORT_TS:
 606                 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
 607                 transl_tmr_func = TMR_ABORT_TASK_SET;
 608                 break;
 609         default:
 610                 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
 611                     sess->vha->host_no, tmr_func);
 612                 return -ENOSYS;
 613         }
 614
 615         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 616             transl_tmr_func, GFP_ATOMIC, tag, flags);
 617 }
 618
 619 static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess,
 620     uint64_t tag)
 621 {
 622         struct qla_tgt_cmd *cmd = NULL;
 623         struct se_cmd *secmd;
 624         unsigned long flags;
 625
 626         if (!sess->se_sess)
 627                 return NULL;
 628
 629         spin_lock_irqsave(&sess->se_sess->sess_cmd_lock, flags);
 630         list_for_each_entry(secmd, &sess->se_sess->sess_cmd_list, se_cmd_list) {
 631                 /* skip task management functions, including tmr->task_cmd */
 632                 if (secmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
 633                         continue;
 634
 635                 if (secmd->tag == tag) {
 636                         cmd = container_of(secmd, struct qla_tgt_cmd, se_cmd);
 637                         break;
 638                 }
 639         }
 640         spin_unlock_irqrestore(&sess->se_sess->sess_cmd_lock, flags);
 641
 642         return cmd;
 643 }
 644
 645 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 646 {
 647         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 648                                 struct qla_tgt_cmd, se_cmd);
 649
 650         if (cmd->aborted) {
 651                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 652                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 653                  * already kick start the free.
 654                  */
 655                 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
 656                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 657                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 658                         cmd->se_cmd.transport_state,
 659                         cmd->se_cmd.t_state,
 660                         cmd->se_cmd.se_cmd_flags);
 661                 return 0;
 662         }
 663
 664         cmd->trc_flags |= TRC_XMIT_DATA;
 665         cmd->bufflen = se_cmd->data_length;
 666         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 667
 668         cmd->sg_cnt = se_cmd->t_data_nents;
 669         cmd->sg = se_cmd->t_data_sg;
 670         cmd->offset = 0;
 671
 672         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 673         cmd->prot_sg = se_cmd->t_prot_sg;
 674         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 675         se_cmd->pi_err = 0;
 676
 677         /*
 678          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 679          */
 680         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 681                                 se_cmd->scsi_status);
 682 }
 683
 684 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 685 {
 686         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 687                                 struct qla_tgt_cmd, se_cmd);
 688         int xmit_type = QLA_TGT_XMIT_STATUS;
 689
 690         if (cmd->aborted) {
 691                 /*
 692                  * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
 693                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 694                  * already kick start the free.
 695                  */
 696                 pr_debug(
 697                     "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
 698                     cmd, kref_read(&cmd->se_cmd.cmd_kref),
 699                     cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
 700                     cmd->se_cmd.se_cmd_flags);
 701                 return 0;
 702         }
 703         cmd->bufflen = se_cmd->data_length;
 704         cmd->sg = NULL;
 705         cmd->sg_cnt = 0;
 706         cmd->offset = 0;
 707         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 708         cmd->trc_flags |= TRC_XMIT_STATUS;
 709
 710         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 711                 /*
 712                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 713                  * for qla_tgt_xmit_response LLD code
 714                  */
 715                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 716                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 717                         se_cmd->residual_count = 0;
 718                 }
 719                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 720                 se_cmd->residual_count += se_cmd->data_length;
 721
 722                 cmd->bufflen = 0;
 723         }
 724         /*
 725          * Now queue status response to qla2xxx LLD code and response ring
 726          */
 727         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 728 }
 729
 730 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 731 {
 732         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 733         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 734                                 struct qla_tgt_mgmt_cmd, se_cmd);
 735
 736         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 737                         mcmd, se_tmr->function, se_tmr->response);
 738         /*
 739          * Do translation between TCM TM response codes and
 740          * QLA2xxx FC TM response codes.
 741          */
 742         switch (se_tmr->response) {
 743         case TMR_FUNCTION_COMPLETE:
 744                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 745                 break;
 746         case TMR_TASK_DOES_NOT_EXIST:
 747                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 748                 break;
 749         case TMR_FUNCTION_REJECTED:
 750                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 751                 break;
 752         case TMR_LUN_DOES_NOT_EXIST:
 753         default:
 754                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 755                 break;
 756         }
 757         /*
 758          * Queue the TM response to QLA2xxx LLD to build a
 759          * CTIO response packet.
 760          */
 761         qlt_xmit_tm_rsp(mcmd);
 762 }
 763
 764 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 765 {
 766         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 767                                 struct qla_tgt_cmd, se_cmd);
 768
 769         if (qlt_abort_cmd(cmd))
 770                 return;
 771 }
 772
 773 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 774                         struct tcm_qla2xxx_nacl *, struct fc_port *);
 775 /*
 776  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 777  */
 778 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
 779 {
 780         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 781         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 782         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 783         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 784                                 struct tcm_qla2xxx_lport, lport_wwn);
 785         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 786                                 struct tcm_qla2xxx_nacl, se_node_acl);
 787         void *node;
 788
 789         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 790
 791         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 792         if (WARN_ON(node && (node != se_nacl))) {
 793                 /*
 794                  * The nacl no longer matches what we think it should be.
 795                  * Most likely a new dynamic acl has been added while
 796                  * someone dropped the hardware lock.  It clearly is a
 797                  * bug elsewhere, but this bit can't make things worse.
 798                  */
 799                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 800                                node, GFP_ATOMIC);
 801         }
 802
 803         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 804             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 805         /*
 806          * Now clear the se_nacl and session pointers from our HW lport lookup
 807          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 808          *
 809          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 810          * target_wait_for_sess_cmds() before the session waits for outstanding
 811          * I/O to complete, to avoid a race between session shutdown execution
 812          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 813          */
 814         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 815 }
 816
 817 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
 818 {
 819         target_sess_cmd_list_set_waiting(sess->se_sess);
 820 }
 821
 822 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 823                 const char *name)
 824 {
 825         struct tcm_qla2xxx_nacl *nacl =
 826                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 827         u64 wwnn;
 828
 829         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 830                 return -EINVAL;
 831
 832         nacl->nport_wwnn = wwnn;
 833         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 834
 835         return 0;
 836 }
 837
 838 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 839
 840 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 841                                                                         \
 842 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
 843                 struct config_item *item, char *page)                   \
 844 {                                                                       \
 845         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 846         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 847                         struct tcm_qla2xxx_tpg, se_tpg);                \
 848                                                                         \
 849         return sprintf(page, "%d\n", tpg->tpg_attrib.name);     \
 850 }                                                                       \
 851                                                                         \
 852 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
 853                 struct config_item *item, const char *page, size_t count) \
 854 {                                                                       \
 855         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 856         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 857                         struct tcm_qla2xxx_tpg, se_tpg);                \
 858         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 859         unsigned long val;                                              \
 860         int ret;                                                        \
 861                                                                         \
 862         ret = kstrtoul(page, 0, &val);                                  \
 863         if (ret < 0) {                                                  \
 864                 pr_err("kstrtoul() failed with"                         \
 865                                 " ret: %d\n", ret);                     \
 866                 return -EINVAL;                                         \
 867         }                                                               \
 868                                                                         \
 869         if ((val != 0) && (val != 1)) {                                 \
 870                 pr_err("Illegal boolean value %lu\n", val);             \
 871                 return -EINVAL;                                         \
 872         }                                                               \
 873                                                                         \
 874         a->name = val;                                                  \
 875                                                                         \
 876         return count;                                                   \
 877 }                                                                       \
 878 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 879
 880 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 881 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 882 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 883 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 884 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 885 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 886 DEF_QLA_TPG_ATTRIB(jam_host);
 887 #endif
 888
 889 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 890         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 891         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 892         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 893         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 894         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 895 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 896         &tcm_qla2xxx_tpg_attrib_attr_jam_host,
 897 #endif
 898         NULL,
 899 };
 900
 901 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 902
 903 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
 904                 char *page)
 905 {
 906         struct se_portal_group *se_tpg = to_tpg(item);
 907         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 908                         struct tcm_qla2xxx_tpg, se_tpg);
 909
 910         return snprintf(page, PAGE_SIZE, "%d\n",
 911                         atomic_read(&tpg->lport_tpg_enabled));
 912 }
 913
 914 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
 915                 const char *page, size_t count)
 916 {
 917         struct se_portal_group *se_tpg = to_tpg(item);
 918         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 919         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 920                         struct tcm_qla2xxx_lport, lport_wwn);
 921         struct scsi_qla_host *vha = lport->qla_vha;
 922         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 923                         struct tcm_qla2xxx_tpg, se_tpg);
 924         unsigned long op;
 925         int rc;
 926
 927         rc = kstrtoul(page, 0, &op);
 928         if (rc < 0) {
 929                 pr_err("kstrtoul() returned %d\n", rc);
 930                 return -EINVAL;
 931         }
 932         if ((op != 1) && (op != 0)) {
 933                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 934                 return -EINVAL;
 935         }
 936         if (op) {
 937                 if (atomic_read(&tpg->lport_tpg_enabled))
 938                         return -EEXIST;
 939
 940                 atomic_set(&tpg->lport_tpg_enabled, 1);
 941                 qlt_enable_vha(vha);
 942         } else {
 943                 if (!atomic_read(&tpg->lport_tpg_enabled))
 944                         return count;
 945
 946                 atomic_set(&tpg->lport_tpg_enabled, 0);
 947                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
 948                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
 949         }
 950
 951         return count;
 952 }
 953
 954 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
 955                 char *page)
 956 {
 957         return target_show_dynamic_sessions(to_tpg(item), page);
 958 }
 959
 960 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
 961                 const char *page, size_t count)
 962 {
 963         struct se_portal_group *se_tpg = to_tpg(item);
 964         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 965                                 struct tcm_qla2xxx_tpg, se_tpg);
 966         unsigned long val;
 967         int ret = kstrtoul(page, 0, &val);
 968
 969         if (ret) {
 970                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
 971                 return ret;
 972         }
 973         if (val != 0 && val != 1 && val != 3) {
 974                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
 975                 return -EINVAL;
 976         }
 977         tpg->tpg_attrib.fabric_prot_type = val;
 978
 979         return count;
 980 }
 981
 982 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
 983                 char *page)
 984 {
 985         struct se_portal_group *se_tpg = to_tpg(item);
 986         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 987                                 struct tcm_qla2xxx_tpg, se_tpg);
 988
 989         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
 990 }
 991
 992 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
 993 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
 994 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
 995
 996 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
 997         &tcm_qla2xxx_tpg_attr_enable,
 998         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
 999         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
1000         NULL,
1001 };
1002
1003 static struct se_portal_group *tcm_qla2xxx_make_tpg(struct se_wwn *wwn,
1004                                                     const char *name)
1005 {
1006         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1007                         struct tcm_qla2xxx_lport, lport_wwn);
1008         struct tcm_qla2xxx_tpg *tpg;
1009         unsigned long tpgt;
1010         int ret;
1011
1012         if (strstr(name, "tpgt_") != name)
1013                 return ERR_PTR(-EINVAL);
1014         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1015                 return ERR_PTR(-EINVAL);
1016
1017         if ((tpgt != 1)) {
1018                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1019                 return ERR_PTR(-ENOSYS);
1020         }
1021
1022         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1023         if (!tpg) {
1024                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1025                 return ERR_PTR(-ENOMEM);
1026         }
1027         tpg->lport = lport;
1028         tpg->lport_tpgt = tpgt;
1029         /*
1030          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1031          * NodeACLs
1032          */
1033         tpg->tpg_attrib.generate_node_acls = 1;
1034         tpg->tpg_attrib.demo_mode_write_protect = 1;
1035         tpg->tpg_attrib.cache_dynamic_acls = 1;
1036         tpg->tpg_attrib.demo_mode_login_only = 1;
1037         tpg->tpg_attrib.jam_host = 0;
1038
1039         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1040         if (ret < 0) {
1041                 kfree(tpg);
1042                 return NULL;
1043         }
1044
1045         lport->tpg_1 = tpg;
1046
1047         return &tpg->se_tpg;
1048 }
1049
1050 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1051 {
1052         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1053                         struct tcm_qla2xxx_tpg, se_tpg);
1054         struct tcm_qla2xxx_lport *lport = tpg->lport;
1055         struct scsi_qla_host *vha = lport->qla_vha;
1056         /*
1057          * Call into qla2x_target.c LLD logic to shutdown the active
1058          * FC Nexuses and disable target mode operation for this qla_hw_data
1059          */
1060         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1061                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1062
1063         core_tpg_deregister(se_tpg);
1064         /*
1065          * Clear local TPG=1 pointer for non NPIV mode.
1066          */
1067         lport->tpg_1 = NULL;
1068         kfree(tpg);
1069 }
1070
1071 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1072                 char *page)
1073 {
1074         return tcm_qla2xxx_tpg_enable_show(item, page);
1075 }
1076
1077 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1078                 const char *page, size_t count)
1079 {
1080         struct se_portal_group *se_tpg = to_tpg(item);
1081         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1082         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1083                         struct tcm_qla2xxx_lport, lport_wwn);
1084         struct scsi_qla_host *vha = lport->qla_vha;
1085         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1086                         struct tcm_qla2xxx_tpg, se_tpg);
1087         unsigned long op;
1088         int rc;
1089
1090         rc = kstrtoul(page, 0, &op);
1091         if (rc < 0) {
1092                 pr_err("kstrtoul() returned %d\n", rc);
1093                 return -EINVAL;
1094         }
1095         if ((op != 1) && (op != 0)) {
1096                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1097                 return -EINVAL;
1098         }
1099         if (op) {
1100                 if (atomic_read(&tpg->lport_tpg_enabled))
1101                         return -EEXIST;
1102
1103                 atomic_set(&tpg->lport_tpg_enabled, 1);
1104                 qlt_enable_vha(vha);
1105         } else {
1106                 if (!atomic_read(&tpg->lport_tpg_enabled))
1107                         return count;
1108
1109                 atomic_set(&tpg->lport_tpg_enabled, 0);
1110                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1111                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1112         }
1113
1114         return count;
1115 }
1116
1117 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1118
1119 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1120         &tcm_qla2xxx_npiv_tpg_attr_enable,
1121         NULL,
1122 };
1123
1124 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(struct se_wwn *wwn,
1125                                                          const char *name)
1126 {
1127         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1128                         struct tcm_qla2xxx_lport, lport_wwn);
1129         struct tcm_qla2xxx_tpg *tpg;
1130         unsigned long tpgt;
1131         int ret;
1132
1133         if (strstr(name, "tpgt_") != name)
1134                 return ERR_PTR(-EINVAL);
1135         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1136                 return ERR_PTR(-EINVAL);
1137
1138         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1139         if (!tpg) {
1140                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1141                 return ERR_PTR(-ENOMEM);
1142         }
1143         tpg->lport = lport;
1144         tpg->lport_tpgt = tpgt;
1145
1146         /*
1147          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1148          * NodeACLs
1149          */
1150         tpg->tpg_attrib.generate_node_acls = 1;
1151         tpg->tpg_attrib.demo_mode_write_protect = 1;
1152         tpg->tpg_attrib.cache_dynamic_acls = 1;
1153         tpg->tpg_attrib.demo_mode_login_only = 1;
1154
1155         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1156         if (ret < 0) {
1157                 kfree(tpg);
1158                 return NULL;
1159         }
1160         lport->tpg_1 = tpg;
1161         return &tpg->se_tpg;
1162 }
1163
1164 /*
1165  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1166  */
1167 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(scsi_qla_host_t *vha,
1168                                                      const be_id_t s_id)
1169 {
1170         struct tcm_qla2xxx_lport *lport;
1171         struct se_node_acl *se_nacl;
1172         struct tcm_qla2xxx_nacl *nacl;
1173         u32 key;
1174
1175         lport = vha->vha_tgt.target_lport_ptr;
1176         if (!lport) {
1177                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1178                 dump_stack();
1179                 return NULL;
1180         }
1181
1182         key = sid_to_key(s_id);
1183         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1184
1185         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1186         if (!se_nacl) {
1187                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1188                 return NULL;
1189         }
1190         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1191             se_nacl, se_nacl->initiatorname);
1192
1193         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1194         if (!nacl->fc_port) {
1195                 pr_err("Unable to locate struct fc_port\n");
1196                 return NULL;
1197         }
1198
1199         return nacl->fc_port;
1200 }
1201
1202 /*
1203  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1204  */
1205 static void tcm_qla2xxx_set_sess_by_s_id(
1206         struct tcm_qla2xxx_lport *lport,
1207         struct se_node_acl *new_se_nacl,
1208         struct tcm_qla2xxx_nacl *nacl,
1209         struct se_session *se_sess,
1210         struct fc_port *fc_port,
1211         be_id_t s_id)
1212 {
1213         u32 key;
1214         void *slot;
1215         int rc;
1216
1217         key = sid_to_key(s_id);
1218         pr_debug("set_sess_by_s_id: %06x\n", key);
1219
1220         slot = btree_lookup32(&lport->lport_fcport_map, key);
1221         if (!slot) {
1222                 if (new_se_nacl) {
1223                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1224                         nacl->nport_id = key;
1225                         rc = btree_insert32(&lport->lport_fcport_map, key,
1226                                         new_se_nacl, GFP_ATOMIC);
1227                         if (rc)
1228                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1229                                     (int)key);
1230                 } else {
1231                         pr_debug("Wiping nonexisting fc_port entry\n");
1232                 }
1233
1234                 fc_port->se_sess = se_sess;
1235                 nacl->fc_port = fc_port;
1236                 return;
1237         }
1238
1239         if (nacl->fc_port) {
1240                 if (new_se_nacl == NULL) {
1241                         pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1242                         btree_remove32(&lport->lport_fcport_map, key);
1243                         nacl->fc_port = NULL;
1244                         return;
1245                 }
1246                 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1247                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1248                 fc_port->se_sess = se_sess;
1249                 nacl->fc_port = fc_port;
1250                 return;
1251         }
1252
1253         if (new_se_nacl == NULL) {
1254                 pr_debug("Clearing existing fc_port entry\n");
1255                 btree_remove32(&lport->lport_fcport_map, key);
1256                 return;
1257         }
1258
1259         pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1260         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1261         fc_port->se_sess = se_sess;
1262         nacl->fc_port = fc_port;
1263
1264         pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1265             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1266 }
1267
1268 /*
1269  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1270  */
1271 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1272         scsi_qla_host_t *vha,
1273         const uint16_t loop_id)
1274 {
1275         struct tcm_qla2xxx_lport *lport;
1276         struct se_node_acl *se_nacl;
1277         struct tcm_qla2xxx_nacl *nacl;
1278         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1279
1280         lport = vha->vha_tgt.target_lport_ptr;
1281         if (!lport) {
1282                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1283                 dump_stack();
1284                 return NULL;
1285         }
1286
1287         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1288
1289         fc_loopid = lport->lport_loopid_map + loop_id;
1290         se_nacl = fc_loopid->se_nacl;
1291         if (!se_nacl) {
1292                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1293                     loop_id);
1294                 return NULL;
1295         }
1296
1297         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1298
1299         if (!nacl->fc_port) {
1300                 pr_err("Unable to locate struct fc_port\n");
1301                 return NULL;
1302         }
1303
1304         return nacl->fc_port;
1305 }
1306
1307 /*
1308  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1309  */
1310 static void tcm_qla2xxx_set_sess_by_loop_id(
1311         struct tcm_qla2xxx_lport *lport,
1312         struct se_node_acl *new_se_nacl,
1313         struct tcm_qla2xxx_nacl *nacl,
1314         struct se_session *se_sess,
1315         struct fc_port *fc_port,
1316         uint16_t loop_id)
1317 {
1318         struct se_node_acl *saved_nacl;
1319         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1320
1321         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1322
1323         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1324                         lport->lport_loopid_map)[loop_id];
1325
1326         saved_nacl = fc_loopid->se_nacl;
1327         if (!saved_nacl) {
1328                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1329                 fc_loopid->se_nacl = new_se_nacl;
1330                 if (fc_port->se_sess != se_sess)
1331                         fc_port->se_sess = se_sess;
1332                 if (nacl->fc_port != fc_port)
1333                         nacl->fc_port = fc_port;
1334                 return;
1335         }
1336
1337         if (nacl->fc_port) {
1338                 if (new_se_nacl == NULL) {
1339                         pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1340                         fc_loopid->se_nacl = NULL;
1341                         nacl->fc_port = NULL;
1342                         return;
1343                 }
1344
1345                 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1346                 fc_loopid->se_nacl = new_se_nacl;
1347                 if (fc_port->se_sess != se_sess)
1348                         fc_port->se_sess = se_sess;
1349                 if (nacl->fc_port != fc_port)
1350                         nacl->fc_port = fc_port;
1351                 return;
1352         }
1353
1354         if (new_se_nacl == NULL) {
1355                 pr_debug("Clearing fc_loopid->se_nacl\n");
1356                 fc_loopid->se_nacl = NULL;
1357                 return;
1358         }
1359
1360         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1361         fc_loopid->se_nacl = new_se_nacl;
1362         if (fc_port->se_sess != se_sess)
1363                 fc_port->se_sess = se_sess;
1364         if (nacl->fc_port != fc_port)
1365                 nacl->fc_port = fc_port;
1366
1367         pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1368             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1369 }
1370
1371 /*
1372  * Should always be called with qla_hw_data->tgt.sess_lock held.
1373  */
1374 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1375                 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1376 {
1377         struct se_session *se_sess = sess->se_sess;
1378
1379         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1380                                      sess, port_id_to_be_id(sess->d_id));
1381         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1382                                 sess, sess->loop_id);
1383 }
1384
1385 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1386 {
1387         struct qla_tgt *tgt = sess->tgt;
1388         struct qla_hw_data *ha = tgt->ha;
1389         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1390         struct se_session *se_sess;
1391         struct tcm_qla2xxx_lport *lport;
1392
1393         BUG_ON(in_interrupt());
1394
1395         se_sess = sess->se_sess;
1396         if (!se_sess) {
1397                 pr_err("struct fc_port->se_sess is NULL\n");
1398                 dump_stack();
1399                 return;
1400         }
1401
1402         lport = vha->vha_tgt.target_lport_ptr;
1403         if (!lport) {
1404                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1405                 dump_stack();
1406                 return;
1407         }
1408         target_wait_for_sess_cmds(se_sess);
1409
1410         target_remove_session(se_sess);
1411 }
1412
1413 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1414                                   struct se_session *se_sess, void *p)
1415 {
1416         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1417                                 struct tcm_qla2xxx_tpg, se_tpg);
1418         struct tcm_qla2xxx_lport *lport = tpg->lport;
1419         struct qla_hw_data *ha = lport->qla_vha->hw;
1420         struct se_node_acl *se_nacl = se_sess->se_node_acl;
1421         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1422                                 struct tcm_qla2xxx_nacl, se_node_acl);
1423         struct fc_port *qlat_sess = p;
1424         uint16_t loop_id = qlat_sess->loop_id;
1425         unsigned long flags;
1426
1427         /*
1428          * And now setup se_nacl and session pointers into HW lport internal
1429          * mappings for fabric S_ID and LOOP_ID.
1430          */
1431         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1432         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess, qlat_sess,
1433                                      port_id_to_be_id(qlat_sess->d_id));
1434         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1435                                         se_sess, qlat_sess, loop_id);
1436         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1437
1438         return 0;
1439 }
1440
1441 /*
1442  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1443  * to locate struct se_node_acl
1444  */
1445 static int tcm_qla2xxx_check_initiator_node_acl(
1446         scsi_qla_host_t *vha,
1447         unsigned char *fc_wwpn,
1448         struct fc_port *qlat_sess)
1449 {
1450         struct qla_hw_data *ha = vha->hw;
1451         struct tcm_qla2xxx_lport *lport;
1452         struct tcm_qla2xxx_tpg *tpg;
1453         struct se_session *se_sess;
1454         unsigned char port_name[36];
1455         int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1456                        TCM_QLA2XXX_DEFAULT_TAGS;
1457
1458         lport = vha->vha_tgt.target_lport_ptr;
1459         if (!lport) {
1460                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1461                 dump_stack();
1462                 return -EINVAL;
1463         }
1464         /*
1465          * Locate the TPG=1 reference..
1466          */
1467         tpg = lport->tpg_1;
1468         if (!tpg) {
1469                 pr_err("Unable to locate struct tcm_qla2xxx_lport->tpg_1\n");
1470                 return -EINVAL;
1471         }
1472         /*
1473          * Format the FCP Initiator port_name into colon seperated values to
1474          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1475          */
1476         memset(&port_name, 0, 36);
1477         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1478         /*
1479          * Locate our struct se_node_acl either from an explict NodeACL created
1480          * via ConfigFS, or via running in TPG demo mode.
1481          */
1482         se_sess = target_setup_session(&tpg->se_tpg, num_tags,
1483                                        sizeof(struct qla_tgt_cmd),
1484                                        TARGET_PROT_ALL, port_name,
1485                                        qlat_sess, tcm_qla2xxx_session_cb);
1486         if (IS_ERR(se_sess))
1487                 return PTR_ERR(se_sess);
1488
1489         return 0;
1490 }
1491
1492 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1493                                     uint16_t loop_id, bool conf_compl_supported)
1494 {
1495         struct qla_tgt *tgt = sess->tgt;
1496         struct qla_hw_data *ha = tgt->ha;
1497         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1498         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1499         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1500         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1501                         struct tcm_qla2xxx_nacl, se_node_acl);
1502         u32 key;
1503
1504
1505         if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1506                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1507                     sess, sess->port_name,
1508                     sess->loop_id, loop_id, sess->d_id.b.domain,
1509                     sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1510                     s_id.b.area, s_id.b.al_pa);
1511
1512         if (sess->loop_id != loop_id) {
1513                 /*
1514                  * Because we can shuffle loop IDs around and we
1515                  * update different sessions non-atomically, we might
1516                  * have overwritten this session's old loop ID
1517                  * already, and we might end up overwriting some other
1518                  * session that will be updated later.  So we have to
1519                  * be extra careful and we can't warn about those things...
1520                  */
1521                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1522                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1523
1524                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1525
1526                 sess->loop_id = loop_id;
1527         }
1528
1529         if (sess->d_id.b24 != s_id.b24) {
1530                 key = (((u32) sess->d_id.b.domain << 16) |
1531                        ((u32) sess->d_id.b.area   <<  8) |
1532                        ((u32) sess->d_id.b.al_pa));
1533
1534                 if (btree_lookup32(&lport->lport_fcport_map, key))
1535                         WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1536                             se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1537                             sess->d_id.b.domain, sess->d_id.b.area,
1538                             sess->d_id.b.al_pa);
1539                 else
1540                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1541                              sess->d_id.b.domain, sess->d_id.b.area,
1542                              sess->d_id.b.al_pa);
1543
1544                 key = (((u32) s_id.b.domain << 16) |
1545                        ((u32) s_id.b.area   <<  8) |
1546                        ((u32) s_id.b.al_pa));
1547
1548                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1549                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1550                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1551                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1552                 } else {
1553                         btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1554                             GFP_ATOMIC);
1555                 }
1556
1557                 sess->d_id = s_id;
1558                 nacl->nport_id = key;
1559         }
1560
1561         sess->conf_compl_supported = conf_compl_supported;
1562
1563 }
1564
1565 /*
1566  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1567  */
1568 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1569         .find_cmd_by_tag        = tcm_qla2xxx_find_cmd_by_tag,
1570         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1571         .handle_data            = tcm_qla2xxx_handle_data,
1572         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1573         .get_cmd                = tcm_qla2xxx_get_cmd,
1574         .rel_cmd                = tcm_qla2xxx_rel_cmd,
1575         .free_cmd               = tcm_qla2xxx_free_cmd,
1576         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1577         .free_session           = tcm_qla2xxx_free_session,
1578         .update_sess            = tcm_qla2xxx_update_sess,
1579         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1580         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1581         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1582         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1583         .put_sess               = tcm_qla2xxx_put_sess,
1584         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1585         .get_dif_tags           = tcm_qla2xxx_dif_tags,
1586         .chk_dif_tags           = tcm_qla2xxx_chk_dif_tags,
1587 };
1588
1589 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1590 {
1591         int rc;
1592
1593         rc = btree_init32(&lport->lport_fcport_map);
1594         if (rc) {
1595                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1596                 return rc;
1597         }
1598
1599         lport->lport_loopid_map =
1600                 vzalloc(array_size(65536,
1601                                    sizeof(struct tcm_qla2xxx_fc_loopid)));
1602         if (!lport->lport_loopid_map) {
1603                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1604                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1605                 btree_destroy32(&lport->lport_fcport_map);
1606                 return -ENOMEM;
1607         }
1608         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1609                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1610         return 0;
1611 }
1612
1613 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1614                                          void *target_lport_ptr,
1615                                          u64 npiv_wwpn, u64 npiv_wwnn)
1616 {
1617         struct qla_hw_data *ha = vha->hw;
1618         struct tcm_qla2xxx_lport *lport =
1619                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1620         /*
1621          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1622          */
1623         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1624         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1625         lport->qla_vha = vha;
1626
1627         return 0;
1628 }
1629
1630 static struct se_wwn *tcm_qla2xxx_make_lport(
1631         struct target_fabric_configfs *tf,
1632         struct config_group *group,
1633         const char *name)
1634 {
1635         struct tcm_qla2xxx_lport *lport;
1636         u64 wwpn;
1637         int ret = -ENODEV;
1638
1639         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1640                 return ERR_PTR(-EINVAL);
1641
1642         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1643         if (!lport) {
1644                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1645                 return ERR_PTR(-ENOMEM);
1646         }
1647         lport->lport_wwpn = wwpn;
1648         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1649                                 wwpn);
1650         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1651
1652         ret = tcm_qla2xxx_init_lport(lport);
1653         if (ret != 0)
1654                 goto out;
1655
1656         ret = qlt_lport_register(lport, wwpn, 0, 0,
1657                                  tcm_qla2xxx_lport_register_cb);
1658         if (ret != 0)
1659                 goto out_lport;
1660
1661         return &lport->lport_wwn;
1662 out_lport:
1663         vfree(lport->lport_loopid_map);
1664         btree_destroy32(&lport->lport_fcport_map);
1665 out:
1666         kfree(lport);
1667         return ERR_PTR(ret);
1668 }
1669
1670 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1671 {
1672         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1673                         struct tcm_qla2xxx_lport, lport_wwn);
1674         struct scsi_qla_host *vha = lport->qla_vha;
1675         struct se_node_acl *node;
1676         u32 key = 0;
1677
1678         /*
1679          * Call into qla2x_target.c LLD logic to complete the
1680          * shutdown of struct qla_tgt after the call to
1681          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1682          */
1683         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1684                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1685
1686         qlt_lport_deregister(vha);
1687
1688         vfree(lport->lport_loopid_map);
1689         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1690                 btree_remove32(&lport->lport_fcport_map, key);
1691         btree_destroy32(&lport->lport_fcport_map);
1692         kfree(lport);
1693 }
1694
1695 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1696                                               void *target_lport_ptr,
1697                                               u64 npiv_wwpn, u64 npiv_wwnn)
1698 {
1699         struct fc_vport *vport;
1700         struct Scsi_Host *sh = base_vha->host;
1701         struct scsi_qla_host *npiv_vha;
1702         struct tcm_qla2xxx_lport *lport =
1703                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1704         struct tcm_qla2xxx_lport *base_lport =
1705                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1706         struct fc_vport_identifiers vport_id;
1707
1708         if (qla_ini_mode_enabled(base_vha)) {
1709                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1710                 return -EPERM;
1711         }
1712
1713         if (!base_lport || !base_lport->tpg_1 ||
1714             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1715                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1716                 return -EPERM;
1717         }
1718
1719         memset(&vport_id, 0, sizeof(vport_id));
1720         vport_id.port_name = npiv_wwpn;
1721         vport_id.node_name = npiv_wwnn;
1722         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1723         vport_id.vport_type = FC_PORTTYPE_NPIV;
1724         vport_id.disable = false;
1725
1726         vport = fc_vport_create(sh, 0, &vport_id);
1727         if (!vport) {
1728                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1729                 return -ENODEV;
1730         }
1731         /*
1732          * Setup local pointer to NPIV vhba + target_lport_ptr
1733          */
1734         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1735         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1736         lport->qla_vha = npiv_vha;
1737         scsi_host_get(npiv_vha->host);
1738         return 0;
1739 }
1740
1741
1742 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1743         struct target_fabric_configfs *tf,
1744         struct config_group *group,
1745         const char *name)
1746 {
1747         struct tcm_qla2xxx_lport *lport;
1748         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1749         char *p, tmp[128];
1750         int ret;
1751
1752         snprintf(tmp, 128, "%s", name);
1753
1754         p = strchr(tmp, '@');
1755         if (!p) {
1756                 pr_err("Unable to locate NPIV '@' separator\n");
1757                 return ERR_PTR(-EINVAL);
1758         }
1759         *p++ = '\0';
1760
1761         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1762                 return ERR_PTR(-EINVAL);
1763
1764         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1765                                        &npiv_wwpn, &npiv_wwnn) < 0)
1766                 return ERR_PTR(-EINVAL);
1767
1768         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1769         if (!lport) {
1770                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1771                 return ERR_PTR(-ENOMEM);
1772         }
1773         lport->lport_npiv_wwpn = npiv_wwpn;
1774         lport->lport_npiv_wwnn = npiv_wwnn;
1775         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1776
1777         ret = tcm_qla2xxx_init_lport(lport);
1778         if (ret != 0)
1779                 goto out;
1780
1781         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1782                                  tcm_qla2xxx_lport_register_npiv_cb);
1783         if (ret != 0)
1784                 goto out_lport;
1785
1786         return &lport->lport_wwn;
1787 out_lport:
1788         vfree(lport->lport_loopid_map);
1789         btree_destroy32(&lport->lport_fcport_map);
1790 out:
1791         kfree(lport);
1792         return ERR_PTR(ret);
1793 }
1794
1795 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1796 {
1797         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1798                         struct tcm_qla2xxx_lport, lport_wwn);
1799         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1800         struct qla_hw_data *ha = npiv_vha->hw;
1801         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1802
1803         scsi_host_put(npiv_vha->host);
1804         /*
1805          * Notify libfc that we want to release the vha->fc_vport
1806          */
1807         fc_vport_terminate(npiv_vha->fc_vport);
1808         scsi_host_put(base_vha->host);
1809         kfree(lport);
1810 }
1811
1812
1813 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1814                 char *page)
1815 {
1816         return sprintf(page,
1817             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1818             QLA2XXX_VERSION, utsname()->sysname,
1819             utsname()->machine, utsname()->release);
1820 }
1821
1822 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1823
1824 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1825         &tcm_qla2xxx_wwn_attr_version,
1826         NULL,
1827 };
1828
1829 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1830         .module                         = THIS_MODULE,
1831         .fabric_name                    = "qla2xxx",
1832         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1833         /*
1834          * XXX: Limit assumes single page per scatter-gather-list entry.
1835          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1836          */
1837         .max_data_sg_nents              = 1200,
1838         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1839         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1840         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1841         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1842         .tpg_check_demo_mode_write_protect =
1843                                         tcm_qla2xxx_check_demo_write_protect,
1844         .tpg_check_prod_mode_write_protect =
1845                                         tcm_qla2xxx_check_prod_write_protect,
1846         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1847         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1848         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1849         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1850         .release_cmd                    = tcm_qla2xxx_release_cmd,
1851         .close_session                  = tcm_qla2xxx_close_session,
1852         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1853         .sess_get_initiator_sid         = NULL,
1854         .write_pending                  = tcm_qla2xxx_write_pending,
1855         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1856         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1857         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1858         .queue_status                   = tcm_qla2xxx_queue_status,
1859         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1860         .aborted_task                   = tcm_qla2xxx_aborted_task,
1861         /*
1862          * Setup function pointers for generic logic in
1863          * target_core_fabric_configfs.c
1864          */
1865         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1866         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1867         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1868         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1869         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1870
1871         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1872         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1873         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1874 };
1875
1876 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1877         .module                         = THIS_MODULE,
1878         .fabric_name                    = "qla2xxx_npiv",
1879         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1880         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1881         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1882         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1883         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1884         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1885         .tpg_check_prod_mode_write_protect =
1886             tcm_qla2xxx_check_prod_write_protect,
1887         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1888         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1889         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1890         .release_cmd                    = tcm_qla2xxx_release_cmd,
1891         .close_session                  = tcm_qla2xxx_close_session,
1892         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1893         .sess_get_initiator_sid         = NULL,
1894         .write_pending                  = tcm_qla2xxx_write_pending,
1895         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1896         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1897         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1898         .queue_status                   = tcm_qla2xxx_queue_status,
1899         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1900         .aborted_task                   = tcm_qla2xxx_aborted_task,
1901         /*
1902          * Setup function pointers for generic logic in
1903          * target_core_fabric_configfs.c
1904          */
1905         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1906         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1907         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1908         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1909         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1910
1911         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1912         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1913 };
1914
1915 static int tcm_qla2xxx_register_configfs(void)
1916 {
1917         int ret;
1918
1919         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1920             QLA2XXX_VERSION, utsname()->sysname,
1921             utsname()->machine, utsname()->release);
1922
1923         ret = target_register_template(&tcm_qla2xxx_ops);
1924         if (ret)
1925                 return ret;
1926
1927         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1928         if (ret)
1929                 goto out_fabric;
1930
1931         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1932                                                 WQ_MEM_RECLAIM, 0);
1933         if (!tcm_qla2xxx_free_wq) {
1934                 ret = -ENOMEM;
1935                 goto out_fabric_npiv;
1936         }
1937
1938         return 0;
1939
1940 out_fabric_npiv:
1941         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1942 out_fabric:
1943         target_unregister_template(&tcm_qla2xxx_ops);
1944         return ret;
1945 }
1946
1947 static void tcm_qla2xxx_deregister_configfs(void)
1948 {
1949         destroy_workqueue(tcm_qla2xxx_free_wq);
1950
1951         target_unregister_template(&tcm_qla2xxx_ops);
1952         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1953 }
1954
1955 static int __init tcm_qla2xxx_init(void)
1956 {
1957         int ret;
1958
1959         BUILD_BUG_ON(sizeof(struct abts_recv_from_24xx) != 64);
1960         BUILD_BUG_ON(sizeof(struct abts_resp_from_24xx_fw) != 64);
1961         BUILD_BUG_ON(sizeof(struct atio7_fcp_cmnd) != 32);
1962         BUILD_BUG_ON(sizeof(struct atio_from_isp) != 64);
1963         BUILD_BUG_ON(sizeof(struct ba_acc_le) != 12);
1964         BUILD_BUG_ON(sizeof(struct ba_rjt_le) != 4);
1965         BUILD_BUG_ON(sizeof(struct ctio7_from_24xx) != 64);
1966         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
1967         BUILD_BUG_ON(sizeof(struct ctio_crc2_to_fw) != 64);
1968         BUILD_BUG_ON(sizeof(struct ctio_crc_from_fw) != 64);
1969         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
1970         BUILD_BUG_ON(sizeof(struct fcp_hdr) != 24);
1971         BUILD_BUG_ON(sizeof(struct fcp_hdr_le) != 24);
1972         BUILD_BUG_ON(sizeof(struct nack_to_isp) != 64);
1973
1974         ret = tcm_qla2xxx_register_configfs();
1975         if (ret < 0)
1976                 return ret;
1977
1978         return 0;
1979 }
1980
1981 static void __exit tcm_qla2xxx_exit(void)
1982 {
1983         tcm_qla2xxx_deregister_configfs();
1984 }
1985
1986 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
1987 MODULE_LICENSE("GPL");
1988 module_init(tcm_qla2xxx_init);
1989 module_exit(tcm_qla2xxx_exit);