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         unsigned long flags;
 259
 260         cmd->cmd_in_wq = 0;
 261
 262         WARN_ON(cmd->trc_flags & TRC_CMD_FREE);
 263
 264         /* To do: protect all tgt_counters manipulations with proper locking. */
 265         cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++;
 266         cmd->trc_flags |= TRC_CMD_FREE;
 267         cmd->cmd_sent_to_fw = 0;
 268
 269         spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
 270         list_del_init(&cmd->sess_cmd_list);
 271         spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);
 272
 273         transport_generic_free_cmd(&cmd->se_cmd, 0);
 274 }
 275
 276 static struct qla_tgt_cmd *tcm_qla2xxx_get_cmd(struct fc_port *sess)
 277 {
 278         struct se_session *se_sess = sess->se_sess;
 279         struct qla_tgt_cmd *cmd;
 280         int tag, cpu;
 281
 282         tag = sbitmap_queue_get(&se_sess->sess_tag_pool, &cpu);
 283         if (tag < 0)
 284                 return NULL;
 285
 286         cmd = &((struct qla_tgt_cmd *)se_sess->sess_cmd_map)[tag];
 287         memset(cmd, 0, sizeof(struct qla_tgt_cmd));
 288         cmd->se_cmd.map_tag = tag;
 289         cmd->se_cmd.map_cpu = cpu;
 290
 291         return cmd;
 292 }
 293
 294 static void tcm_qla2xxx_rel_cmd(struct qla_tgt_cmd *cmd)
 295 {
 296         target_free_tag(cmd->sess->se_sess, &cmd->se_cmd);
 297 }
 298
 299 /*
 300  * Called from qla_target_template->free_cmd(), and will call
 301  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 302  * release callback.  qla_hw_data->hardware_lock is expected to be held
 303  */
 304 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 305 {
 306         cmd->qpair->tgt_counters.core_qla_free_cmd++;
 307         cmd->cmd_in_wq = 1;
 308
 309         WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
 310         cmd->trc_flags |= TRC_CMD_DONE;
 311
 312         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 313         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 314 }
 315
 316 /*
 317  * Called from struct target_core_fabric_ops->check_stop_free() context
 318  */
 319 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 320 {
 321         struct qla_tgt_cmd *cmd;
 322
 323         if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 324                 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 325                 cmd->trc_flags |= TRC_CMD_CHK_STOP;
 326         }
 327
 328         return target_put_sess_cmd(se_cmd);
 329 }
 330
 331 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 332  * fabric descriptor @se_cmd command to release
 333  */
 334 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 335 {
 336         struct qla_tgt_cmd *cmd;
 337
 338         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 339                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 340                                 struct qla_tgt_mgmt_cmd, se_cmd);
 341                 qlt_free_mcmd(mcmd);
 342                 return;
 343         }
 344         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 345
 346         if (WARN_ON(cmd->cmd_sent_to_fw))
 347                 return;
 348
 349         qlt_free_cmd(cmd);
 350 }
 351
 352 static void tcm_qla2xxx_release_session(struct kref *kref)
 353 {
 354         struct fc_port  *sess = container_of(kref,
 355             struct fc_port, sess_kref);
 356
 357         qlt_unreg_sess(sess);
 358 }
 359
 360 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
 361 {
 362         if (!sess)
 363                 return;
 364
 365         kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
 366 }
 367
 368 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 369 {
 370         struct fc_port *sess = se_sess->fabric_sess_ptr;
 371
 372         BUG_ON(!sess);
 373
 374         target_stop_session(se_sess);
 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 rc, target_flags = TARGET_SCF_ACK_KREF;
 455         unsigned long flags;
 456
 457         if (bidi)
 458                 target_flags |= TARGET_SCF_BIDI_OP;
 459
 460         if (se_cmd->cpuid != WORK_CPU_UNBOUND)
 461                 target_flags |= TARGET_SCF_USE_CPUID;
 462
 463         sess = cmd->sess;
 464         if (!sess) {
 465                 pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
 466                 return -EINVAL;
 467         }
 468
 469         se_sess = sess->se_sess;
 470         if (!se_sess) {
 471                 pr_err("Unable to locate active struct se_session\n");
 472                 return -EINVAL;
 473         }
 474
 475 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 476         se_tpg = se_sess->se_tpg;
 477         tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
 478         if (unlikely(tpg->tpg_attrib.jam_host)) {
 479                 /* return, and dont run target_submit_cmd,discarding command */
 480                 return 0;
 481         }
 482 #endif
 483         cmd->qpair->tgt_counters.qla_core_sbt_cmd++;
 484
 485         spin_lock_irqsave(&sess->sess_cmd_lock, flags);
 486         list_add_tail(&cmd->sess_cmd_list, &sess->sess_cmd_list);
 487         spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);
 488
 489         rc = target_init_cmd(se_cmd, se_sess, &cmd->sense_buffer[0],
 490                              cmd->unpacked_lun, data_length, fcp_task_attr,
 491                              data_dir, target_flags);
 492         if (rc)
 493                 return rc;
 494
 495         if (target_submit_prep(se_cmd, cdb, NULL, 0, NULL, 0, NULL, 0,
 496                                GFP_KERNEL))
 497                 return 0;
 498
 499         target_submit(se_cmd);
 500         return 0;
 501 }
 502
 503 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 504 {
 505         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 506
 507         /*
 508          * Ensure that the complete FCP WRITE payload has been received.
 509          * Otherwise return an exception via CHECK_CONDITION status.
 510          */
 511         cmd->cmd_in_wq = 0;
 512         cmd->cmd_sent_to_fw = 0;
 513         if (cmd->aborted) {
 514                 transport_generic_request_failure(&cmd->se_cmd,
 515                         TCM_CHECK_CONDITION_ABORT_CMD);
 516                 return;
 517         }
 518
 519         cmd->qpair->tgt_counters.qla_core_ret_ctio++;
 520         if (!cmd->write_data_transferred) {
 521                 switch (cmd->dif_err_code) {
 522                 case DIF_ERR_GRD:
 523                         cmd->se_cmd.pi_err =
 524                             TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
 525                         break;
 526                 case DIF_ERR_REF:
 527                         cmd->se_cmd.pi_err =
 528                             TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
 529                         break;
 530                 case DIF_ERR_APP:
 531                         cmd->se_cmd.pi_err =
 532                             TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
 533                         break;
 534                 case DIF_ERR_NONE:
 535                 default:
 536                         break;
 537                 }
 538
 539                 if (cmd->se_cmd.pi_err)
 540                         transport_generic_request_failure(&cmd->se_cmd,
 541                                 cmd->se_cmd.pi_err);
 542                 else
 543                         transport_generic_request_failure(&cmd->se_cmd,
 544                                 TCM_CHECK_CONDITION_ABORT_CMD);
 545
 546                 return;
 547         }
 548
 549         return target_execute_cmd(&cmd->se_cmd);
 550 }
 551
 552 /*
 553  * Called from qla_target.c:qlt_do_ctio_completion()
 554  */
 555 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 556 {
 557         cmd->trc_flags |= TRC_DATA_IN;
 558         cmd->cmd_in_wq = 1;
 559         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 560         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 561 }
 562
 563 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
 564 {
 565         return 0;
 566 }
 567
 568 static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
 569     uint16_t *pfw_prot_opts)
 570 {
 571         struct se_cmd *se_cmd = &cmd->se_cmd;
 572
 573         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
 574                 *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
 575
 576         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
 577                 *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
 578
 579         return 0;
 580 }
 581
 582 /*
 583  * Called from qla_target.c:qlt_issue_task_mgmt()
 584  */
 585 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun,
 586         uint16_t tmr_func, uint32_t tag)
 587 {
 588         struct fc_port *sess = mcmd->sess;
 589         struct se_cmd *se_cmd = &mcmd->se_cmd;
 590         int transl_tmr_func = 0;
 591
 592         switch (tmr_func) {
 593         case QLA_TGT_ABTS:
 594                 pr_debug("%ld: ABTS received\n", sess->vha->host_no);
 595                 transl_tmr_func = TMR_ABORT_TASK;
 596                 break;
 597         case QLA_TGT_2G_ABORT_TASK:
 598                 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
 599                 transl_tmr_func = TMR_ABORT_TASK;
 600                 break;
 601         case QLA_TGT_CLEAR_ACA:
 602                 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
 603                 transl_tmr_func = TMR_CLEAR_ACA;
 604                 break;
 605         case QLA_TGT_TARGET_RESET:
 606                 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
 607                 transl_tmr_func = TMR_TARGET_WARM_RESET;
 608                 break;
 609         case QLA_TGT_LUN_RESET:
 610                 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
 611                 transl_tmr_func = TMR_LUN_RESET;
 612                 break;
 613         case QLA_TGT_CLEAR_TS:
 614                 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
 615                 transl_tmr_func = TMR_CLEAR_TASK_SET;
 616                 break;
 617         case QLA_TGT_ABORT_TS:
 618                 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
 619                 transl_tmr_func = TMR_ABORT_TASK_SET;
 620                 break;
 621         default:
 622                 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
 623                     sess->vha->host_no, tmr_func);
 624                 return -ENOSYS;
 625         }
 626
 627         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 628             transl_tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
 629 }
 630
 631 static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess,
 632     uint64_t tag)
 633 {
 634         struct qla_tgt_cmd *cmd;
 635         unsigned long flags;
 636
 637         if (!sess->se_sess)
 638                 return NULL;
 639
 640         spin_lock_irqsave(&sess->sess_cmd_lock, flags);
 641         list_for_each_entry(cmd, &sess->sess_cmd_list, sess_cmd_list) {
 642                 if (cmd->se_cmd.tag == tag)
 643                         goto done;
 644         }
 645         cmd = NULL;
 646 done:
 647         spin_unlock_irqrestore(&sess->sess_cmd_lock, flags);
 648
 649         return cmd;
 650 }
 651
 652 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 653 {
 654         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 655                                 struct qla_tgt_cmd, se_cmd);
 656
 657         if (cmd->aborted) {
 658                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 659                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 660                  * already kick start the free.
 661                  */
 662                 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
 663                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 664                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 665                         cmd->se_cmd.transport_state,
 666                         cmd->se_cmd.t_state,
 667                         cmd->se_cmd.se_cmd_flags);
 668                 return 0;
 669         }
 670
 671         cmd->trc_flags |= TRC_XMIT_DATA;
 672         cmd->bufflen = se_cmd->data_length;
 673         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 674
 675         cmd->sg_cnt = se_cmd->t_data_nents;
 676         cmd->sg = se_cmd->t_data_sg;
 677         cmd->offset = 0;
 678
 679         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 680         cmd->prot_sg = se_cmd->t_prot_sg;
 681         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 682         se_cmd->pi_err = 0;
 683
 684         /*
 685          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 686          */
 687         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 688                                 se_cmd->scsi_status);
 689 }
 690
 691 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 692 {
 693         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 694                                 struct qla_tgt_cmd, se_cmd);
 695         int xmit_type = QLA_TGT_XMIT_STATUS;
 696
 697         if (cmd->aborted) {
 698                 /*
 699                  * Cmd can loop during Q-full. tcm_qla2xxx_aborted_task
 700                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 701                  * already kick start the free.
 702                  */
 703                 pr_debug(
 704                     "queue_data_in aborted cmd[%p] refcount %d transport_state %x, t_state %x, se_cmd_flags %x\n",
 705                     cmd, kref_read(&cmd->se_cmd.cmd_kref),
 706                     cmd->se_cmd.transport_state, cmd->se_cmd.t_state,
 707                     cmd->se_cmd.se_cmd_flags);
 708                 return 0;
 709         }
 710         cmd->bufflen = se_cmd->data_length;
 711         cmd->sg = NULL;
 712         cmd->sg_cnt = 0;
 713         cmd->offset = 0;
 714         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 715         cmd->trc_flags |= TRC_XMIT_STATUS;
 716
 717         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 718                 /*
 719                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 720                  * for qla_tgt_xmit_response LLD code
 721                  */
 722                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 723                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 724                         se_cmd->residual_count = 0;
 725                 }
 726                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 727                 se_cmd->residual_count += se_cmd->data_length;
 728
 729                 cmd->bufflen = 0;
 730         }
 731         /*
 732          * Now queue status response to qla2xxx LLD code and response ring
 733          */
 734         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 735 }
 736
 737 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 738 {
 739         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 740         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 741                                 struct qla_tgt_mgmt_cmd, se_cmd);
 742
 743         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 744                         mcmd, se_tmr->function, se_tmr->response);
 745         /*
 746          * Do translation between TCM TM response codes and
 747          * QLA2xxx FC TM response codes.
 748          */
 749         switch (se_tmr->response) {
 750         case TMR_FUNCTION_COMPLETE:
 751                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 752                 break;
 753         case TMR_TASK_DOES_NOT_EXIST:
 754                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 755                 break;
 756         case TMR_FUNCTION_REJECTED:
 757                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 758                 break;
 759         case TMR_LUN_DOES_NOT_EXIST:
 760         default:
 761                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 762                 break;
 763         }
 764         /*
 765          * Queue the TM response to QLA2xxx LLD to build a
 766          * CTIO response packet.
 767          */
 768         qlt_xmit_tm_rsp(mcmd);
 769 }
 770
 771 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 772 {
 773         struct qla_tgt_cmd *cmd;
 774         unsigned long flags;
 775
 776         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)
 777                 return;
 778
 779         cmd  = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 780
 781         spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags);
 782         list_del_init(&cmd->sess_cmd_list);
 783         spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags);
 784
 785         qlt_abort_cmd(cmd);
 786 }
 787
 788 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 789                         struct tcm_qla2xxx_nacl *, struct fc_port *);
 790 /*
 791  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 792  */
 793 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
 794 {
 795         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 796         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 797         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 798         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 799                                 struct tcm_qla2xxx_lport, lport_wwn);
 800         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 801                                 struct tcm_qla2xxx_nacl, se_node_acl);
 802         void *node;
 803
 804         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 805
 806         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 807         if (WARN_ON(node && (node != se_nacl))) {
 808                 /*
 809                  * The nacl no longer matches what we think it should be.
 810                  * Most likely a new dynamic acl has been added while
 811                  * someone dropped the hardware lock.  It clearly is a
 812                  * bug elsewhere, but this bit can't make things worse.
 813                  */
 814                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 815                                node, GFP_ATOMIC);
 816         }
 817
 818         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 819             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 820         /*
 821          * Now clear the se_nacl and session pointers from our HW lport lookup
 822          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 823          *
 824          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 825          * target_wait_for_sess_cmds() before the session waits for outstanding
 826          * I/O to complete, to avoid a race between session shutdown execution
 827          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 828          */
 829         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 830 }
 831
 832 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
 833 {
 834         target_stop_session(sess->se_sess);
 835 }
 836
 837 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 838                 const char *name)
 839 {
 840         struct tcm_qla2xxx_nacl *nacl =
 841                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 842         u64 wwnn;
 843
 844         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 845                 return -EINVAL;
 846
 847         nacl->nport_wwnn = wwnn;
 848         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 849
 850         return 0;
 851 }
 852
 853 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 854
 855 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 856                                                                         \
 857 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
 858                 struct config_item *item, char *page)                   \
 859 {                                                                       \
 860         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 861         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 862                         struct tcm_qla2xxx_tpg, se_tpg);                \
 863                                                                         \
 864         return sprintf(page, "%d\n", tpg->tpg_attrib.name);     \
 865 }                                                                       \
 866                                                                         \
 867 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
 868                 struct config_item *item, const char *page, size_t count) \
 869 {                                                                       \
 870         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 871         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 872                         struct tcm_qla2xxx_tpg, se_tpg);                \
 873         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 874         unsigned long val;                                              \
 875         int ret;                                                        \
 876                                                                         \
 877         ret = kstrtoul(page, 0, &val);                                  \
 878         if (ret < 0) {                                                  \
 879                 pr_err("kstrtoul() failed with"                         \
 880                                 " ret: %d\n", ret);                     \
 881                 return -EINVAL;                                         \
 882         }                                                               \
 883                                                                         \
 884         if ((val != 0) && (val != 1)) {                                 \
 885                 pr_err("Illegal boolean value %lu\n", val);             \
 886                 return -EINVAL;                                         \
 887         }                                                               \
 888                                                                         \
 889         a->name = val;                                                  \
 890                                                                         \
 891         return count;                                                   \
 892 }                                                                       \
 893 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 894
 895 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 896 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 897 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 898 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 899 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 900 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 901 DEF_QLA_TPG_ATTRIB(jam_host);
 902 #endif
 903
 904 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 905         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 906         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 907         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 908         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 909         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 910 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 911         &tcm_qla2xxx_tpg_attrib_attr_jam_host,
 912 #endif
 913         NULL,
 914 };
 915
 916 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 917
 918 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
 919                 char *page)
 920 {
 921         struct se_portal_group *se_tpg = to_tpg(item);
 922         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 923                         struct tcm_qla2xxx_tpg, se_tpg);
 924
 925         return snprintf(page, PAGE_SIZE, "%d\n",
 926                         atomic_read(&tpg->lport_tpg_enabled));
 927 }
 928
 929 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
 930                 const char *page, size_t count)
 931 {
 932         struct se_portal_group *se_tpg = to_tpg(item);
 933         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 934         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 935                         struct tcm_qla2xxx_lport, lport_wwn);
 936         struct scsi_qla_host *vha = lport->qla_vha;
 937         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 938                         struct tcm_qla2xxx_tpg, se_tpg);
 939         unsigned long op;
 940         int rc;
 941
 942         rc = kstrtoul(page, 0, &op);
 943         if (rc < 0) {
 944                 pr_err("kstrtoul() returned %d\n", rc);
 945                 return -EINVAL;
 946         }
 947         if ((op != 1) && (op != 0)) {
 948                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 949                 return -EINVAL;
 950         }
 951         if (op) {
 952                 if (atomic_read(&tpg->lport_tpg_enabled))
 953                         return -EEXIST;
 954
 955                 atomic_set(&tpg->lport_tpg_enabled, 1);
 956                 qlt_enable_vha(vha);
 957         } else {
 958                 if (!atomic_read(&tpg->lport_tpg_enabled))
 959                         return count;
 960
 961                 atomic_set(&tpg->lport_tpg_enabled, 0);
 962                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
 963                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
 964         }
 965
 966         return count;
 967 }
 968
 969 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
 970                 char *page)
 971 {
 972         return target_show_dynamic_sessions(to_tpg(item), page);
 973 }
 974
 975 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
 976                 const char *page, size_t count)
 977 {
 978         struct se_portal_group *se_tpg = to_tpg(item);
 979         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 980                                 struct tcm_qla2xxx_tpg, se_tpg);
 981         unsigned long val;
 982         int ret = kstrtoul(page, 0, &val);
 983
 984         if (ret) {
 985                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
 986                 return ret;
 987         }
 988         if (val != 0 && val != 1 && val != 3) {
 989                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
 990                 return -EINVAL;
 991         }
 992         tpg->tpg_attrib.fabric_prot_type = val;
 993
 994         return count;
 995 }
 996
 997 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
 998                 char *page)
 999 {
1000         struct se_portal_group *se_tpg = to_tpg(item);
1001         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1002                                 struct tcm_qla2xxx_tpg, se_tpg);
1003
1004         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
1005 }
1006
1007 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
1008 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
1009 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
1010
1011 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
1012         &tcm_qla2xxx_tpg_attr_enable,
1013         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
1014         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
1015         NULL,
1016 };
1017
1018 static struct se_portal_group *tcm_qla2xxx_make_tpg(struct se_wwn *wwn,
1019                                                     const char *name)
1020 {
1021         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1022                         struct tcm_qla2xxx_lport, lport_wwn);
1023         struct tcm_qla2xxx_tpg *tpg;
1024         unsigned long tpgt;
1025         int ret;
1026
1027         if (strstr(name, "tpgt_") != name)
1028                 return ERR_PTR(-EINVAL);
1029         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1030                 return ERR_PTR(-EINVAL);
1031
1032         if ((tpgt != 1)) {
1033                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1034                 return ERR_PTR(-ENOSYS);
1035         }
1036
1037         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1038         if (!tpg) {
1039                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1040                 return ERR_PTR(-ENOMEM);
1041         }
1042         tpg->lport = lport;
1043         tpg->lport_tpgt = tpgt;
1044         /*
1045          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1046          * NodeACLs
1047          */
1048         tpg->tpg_attrib.generate_node_acls = 1;
1049         tpg->tpg_attrib.demo_mode_write_protect = 1;
1050         tpg->tpg_attrib.cache_dynamic_acls = 1;
1051         tpg->tpg_attrib.demo_mode_login_only = 1;
1052         tpg->tpg_attrib.jam_host = 0;
1053
1054         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1055         if (ret < 0) {
1056                 kfree(tpg);
1057                 return NULL;
1058         }
1059
1060         lport->tpg_1 = tpg;
1061
1062         return &tpg->se_tpg;
1063 }
1064
1065 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1066 {
1067         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1068                         struct tcm_qla2xxx_tpg, se_tpg);
1069         struct tcm_qla2xxx_lport *lport = tpg->lport;
1070         struct scsi_qla_host *vha = lport->qla_vha;
1071         /*
1072          * Call into qla2x_target.c LLD logic to shutdown the active
1073          * FC Nexuses and disable target mode operation for this qla_hw_data
1074          */
1075         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1076                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1077
1078         core_tpg_deregister(se_tpg);
1079         /*
1080          * Clear local TPG=1 pointer for non NPIV mode.
1081          */
1082         lport->tpg_1 = NULL;
1083         kfree(tpg);
1084 }
1085
1086 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1087                 char *page)
1088 {
1089         return tcm_qla2xxx_tpg_enable_show(item, page);
1090 }
1091
1092 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1093                 const char *page, size_t count)
1094 {
1095         struct se_portal_group *se_tpg = to_tpg(item);
1096         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1097         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1098                         struct tcm_qla2xxx_lport, lport_wwn);
1099         struct scsi_qla_host *vha = lport->qla_vha;
1100         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1101                         struct tcm_qla2xxx_tpg, se_tpg);
1102         unsigned long op;
1103         int rc;
1104
1105         rc = kstrtoul(page, 0, &op);
1106         if (rc < 0) {
1107                 pr_err("kstrtoul() returned %d\n", rc);
1108                 return -EINVAL;
1109         }
1110         if ((op != 1) && (op != 0)) {
1111                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1112                 return -EINVAL;
1113         }
1114         if (op) {
1115                 if (atomic_read(&tpg->lport_tpg_enabled))
1116                         return -EEXIST;
1117
1118                 atomic_set(&tpg->lport_tpg_enabled, 1);
1119                 qlt_enable_vha(vha);
1120         } else {
1121                 if (!atomic_read(&tpg->lport_tpg_enabled))
1122                         return count;
1123
1124                 atomic_set(&tpg->lport_tpg_enabled, 0);
1125                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1126                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1127         }
1128
1129         return count;
1130 }
1131
1132 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1133
1134 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1135         &tcm_qla2xxx_npiv_tpg_attr_enable,
1136         NULL,
1137 };
1138
1139 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(struct se_wwn *wwn,
1140                                                          const char *name)
1141 {
1142         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1143                         struct tcm_qla2xxx_lport, lport_wwn);
1144         struct tcm_qla2xxx_tpg *tpg;
1145         unsigned long tpgt;
1146         int ret;
1147
1148         if (strstr(name, "tpgt_") != name)
1149                 return ERR_PTR(-EINVAL);
1150         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1151                 return ERR_PTR(-EINVAL);
1152
1153         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1154         if (!tpg) {
1155                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1156                 return ERR_PTR(-ENOMEM);
1157         }
1158         tpg->lport = lport;
1159         tpg->lport_tpgt = tpgt;
1160
1161         /*
1162          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1163          * NodeACLs
1164          */
1165         tpg->tpg_attrib.generate_node_acls = 1;
1166         tpg->tpg_attrib.demo_mode_write_protect = 1;
1167         tpg->tpg_attrib.cache_dynamic_acls = 1;
1168         tpg->tpg_attrib.demo_mode_login_only = 1;
1169
1170         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1171         if (ret < 0) {
1172                 kfree(tpg);
1173                 return NULL;
1174         }
1175         lport->tpg_1 = tpg;
1176         return &tpg->se_tpg;
1177 }
1178
1179 /*
1180  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1181  */
1182 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(scsi_qla_host_t *vha,
1183                                                      const be_id_t s_id)
1184 {
1185         struct tcm_qla2xxx_lport *lport;
1186         struct se_node_acl *se_nacl;
1187         struct tcm_qla2xxx_nacl *nacl;
1188         u32 key;
1189
1190         lport = vha->vha_tgt.target_lport_ptr;
1191         if (!lport) {
1192                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1193                 dump_stack();
1194                 return NULL;
1195         }
1196
1197         key = sid_to_key(s_id);
1198         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1199
1200         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1201         if (!se_nacl) {
1202                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1203                 return NULL;
1204         }
1205         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1206             se_nacl, se_nacl->initiatorname);
1207
1208         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1209         if (!nacl->fc_port) {
1210                 pr_err("Unable to locate struct fc_port\n");
1211                 return NULL;
1212         }
1213
1214         return nacl->fc_port;
1215 }
1216
1217 /*
1218  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1219  */
1220 static void tcm_qla2xxx_set_sess_by_s_id(
1221         struct tcm_qla2xxx_lport *lport,
1222         struct se_node_acl *new_se_nacl,
1223         struct tcm_qla2xxx_nacl *nacl,
1224         struct se_session *se_sess,
1225         struct fc_port *fc_port,
1226         be_id_t s_id)
1227 {
1228         u32 key;
1229         void *slot;
1230         int rc;
1231
1232         key = sid_to_key(s_id);
1233         pr_debug("set_sess_by_s_id: %06x\n", key);
1234
1235         slot = btree_lookup32(&lport->lport_fcport_map, key);
1236         if (!slot) {
1237                 if (new_se_nacl) {
1238                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1239                         nacl->nport_id = key;
1240                         rc = btree_insert32(&lport->lport_fcport_map, key,
1241                                         new_se_nacl, GFP_ATOMIC);
1242                         if (rc)
1243                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1244                                     (int)key);
1245                 } else {
1246                         pr_debug("Wiping nonexisting fc_port entry\n");
1247                 }
1248
1249                 fc_port->se_sess = se_sess;
1250                 nacl->fc_port = fc_port;
1251                 return;
1252         }
1253
1254         if (nacl->fc_port) {
1255                 if (new_se_nacl == NULL) {
1256                         pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1257                         btree_remove32(&lport->lport_fcport_map, key);
1258                         nacl->fc_port = NULL;
1259                         return;
1260                 }
1261                 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1262                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1263                 fc_port->se_sess = se_sess;
1264                 nacl->fc_port = fc_port;
1265                 return;
1266         }
1267
1268         if (new_se_nacl == NULL) {
1269                 pr_debug("Clearing existing fc_port entry\n");
1270                 btree_remove32(&lport->lport_fcport_map, key);
1271                 return;
1272         }
1273
1274         pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1275         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1276         fc_port->se_sess = se_sess;
1277         nacl->fc_port = fc_port;
1278
1279         pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1280             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1281 }
1282
1283 /*
1284  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1285  */
1286 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1287         scsi_qla_host_t *vha,
1288         const uint16_t loop_id)
1289 {
1290         struct tcm_qla2xxx_lport *lport;
1291         struct se_node_acl *se_nacl;
1292         struct tcm_qla2xxx_nacl *nacl;
1293         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1294
1295         lport = vha->vha_tgt.target_lport_ptr;
1296         if (!lport) {
1297                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1298                 dump_stack();
1299                 return NULL;
1300         }
1301
1302         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1303
1304         fc_loopid = lport->lport_loopid_map + loop_id;
1305         se_nacl = fc_loopid->se_nacl;
1306         if (!se_nacl) {
1307                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1308                     loop_id);
1309                 return NULL;
1310         }
1311
1312         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1313
1314         if (!nacl->fc_port) {
1315                 pr_err("Unable to locate struct fc_port\n");
1316                 return NULL;
1317         }
1318
1319         return nacl->fc_port;
1320 }
1321
1322 /*
1323  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1324  */
1325 static void tcm_qla2xxx_set_sess_by_loop_id(
1326         struct tcm_qla2xxx_lport *lport,
1327         struct se_node_acl *new_se_nacl,
1328         struct tcm_qla2xxx_nacl *nacl,
1329         struct se_session *se_sess,
1330         struct fc_port *fc_port,
1331         uint16_t loop_id)
1332 {
1333         struct se_node_acl *saved_nacl;
1334         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1335
1336         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1337
1338         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1339                         lport->lport_loopid_map)[loop_id];
1340
1341         saved_nacl = fc_loopid->se_nacl;
1342         if (!saved_nacl) {
1343                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1344                 fc_loopid->se_nacl = new_se_nacl;
1345                 if (fc_port->se_sess != se_sess)
1346                         fc_port->se_sess = se_sess;
1347                 if (nacl->fc_port != fc_port)
1348                         nacl->fc_port = fc_port;
1349                 return;
1350         }
1351
1352         if (nacl->fc_port) {
1353                 if (new_se_nacl == NULL) {
1354                         pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1355                         fc_loopid->se_nacl = NULL;
1356                         nacl->fc_port = NULL;
1357                         return;
1358                 }
1359
1360                 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\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                 return;
1367         }
1368
1369         if (new_se_nacl == NULL) {
1370                 pr_debug("Clearing fc_loopid->se_nacl\n");
1371                 fc_loopid->se_nacl = NULL;
1372                 return;
1373         }
1374
1375         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1376         fc_loopid->se_nacl = new_se_nacl;
1377         if (fc_port->se_sess != se_sess)
1378                 fc_port->se_sess = se_sess;
1379         if (nacl->fc_port != fc_port)
1380                 nacl->fc_port = fc_port;
1381
1382         pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1383             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1384 }
1385
1386 /*
1387  * Should always be called with qla_hw_data->tgt.sess_lock held.
1388  */
1389 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1390                 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1391 {
1392         struct se_session *se_sess = sess->se_sess;
1393
1394         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1395                                      sess, port_id_to_be_id(sess->d_id));
1396         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1397                                 sess, sess->loop_id);
1398 }
1399
1400 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1401 {
1402         struct qla_tgt *tgt = sess->tgt;
1403         struct qla_hw_data *ha = tgt->ha;
1404         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1405         struct se_session *se_sess;
1406         struct tcm_qla2xxx_lport *lport;
1407
1408         se_sess = sess->se_sess;
1409         if (!se_sess) {
1410                 pr_err("struct fc_port->se_sess is NULL\n");
1411                 dump_stack();
1412                 return;
1413         }
1414
1415         lport = vha->vha_tgt.target_lport_ptr;
1416         if (!lport) {
1417                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1418                 dump_stack();
1419                 return;
1420         }
1421         target_wait_for_sess_cmds(se_sess);
1422
1423         target_remove_session(se_sess);
1424 }
1425
1426 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1427                                   struct se_session *se_sess, void *p)
1428 {
1429         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1430                                 struct tcm_qla2xxx_tpg, se_tpg);
1431         struct tcm_qla2xxx_lport *lport = tpg->lport;
1432         struct qla_hw_data *ha = lport->qla_vha->hw;
1433         struct se_node_acl *se_nacl = se_sess->se_node_acl;
1434         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1435                                 struct tcm_qla2xxx_nacl, se_node_acl);
1436         struct fc_port *qlat_sess = p;
1437         uint16_t loop_id = qlat_sess->loop_id;
1438         unsigned long flags;
1439
1440         /*
1441          * And now setup se_nacl and session pointers into HW lport internal
1442          * mappings for fabric S_ID and LOOP_ID.
1443          */
1444         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1445         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess, qlat_sess,
1446                                      port_id_to_be_id(qlat_sess->d_id));
1447         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1448                                         se_sess, qlat_sess, loop_id);
1449         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1450
1451         return 0;
1452 }
1453
1454 /*
1455  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1456  * to locate struct se_node_acl
1457  */
1458 static int tcm_qla2xxx_check_initiator_node_acl(
1459         scsi_qla_host_t *vha,
1460         unsigned char *fc_wwpn,
1461         struct fc_port *qlat_sess)
1462 {
1463         struct qla_hw_data *ha = vha->hw;
1464         struct tcm_qla2xxx_lport *lport;
1465         struct tcm_qla2xxx_tpg *tpg;
1466         struct se_session *se_sess;
1467         unsigned char port_name[36];
1468         int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1469                        TCM_QLA2XXX_DEFAULT_TAGS;
1470
1471         lport = vha->vha_tgt.target_lport_ptr;
1472         if (!lport) {
1473                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1474                 dump_stack();
1475                 return -EINVAL;
1476         }
1477         /*
1478          * Locate the TPG=1 reference..
1479          */
1480         tpg = lport->tpg_1;
1481         if (!tpg) {
1482                 pr_err("Unable to locate struct tcm_qla2xxx_lport->tpg_1\n");
1483                 return -EINVAL;
1484         }
1485         /*
1486          * Format the FCP Initiator port_name into colon seperated values to
1487          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1488          */
1489         memset(&port_name, 0, 36);
1490         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1491         /*
1492          * Locate our struct se_node_acl either from an explict NodeACL created
1493          * via ConfigFS, or via running in TPG demo mode.
1494          */
1495         se_sess = target_setup_session(&tpg->se_tpg, num_tags,
1496                                        sizeof(struct qla_tgt_cmd),
1497                                        TARGET_PROT_ALL, port_name,
1498                                        qlat_sess, tcm_qla2xxx_session_cb);
1499         if (IS_ERR(se_sess))
1500                 return PTR_ERR(se_sess);
1501
1502         return 0;
1503 }
1504
1505 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1506                                     uint16_t loop_id, bool conf_compl_supported)
1507 {
1508         struct qla_tgt *tgt = sess->tgt;
1509         struct qla_hw_data *ha = tgt->ha;
1510         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1511         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1512         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1513         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1514                         struct tcm_qla2xxx_nacl, se_node_acl);
1515         u32 key;
1516
1517
1518         if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1519                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1520                     sess, sess->port_name,
1521                     sess->loop_id, loop_id, sess->d_id.b.domain,
1522                     sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1523                     s_id.b.area, s_id.b.al_pa);
1524
1525         if (sess->loop_id != loop_id) {
1526                 /*
1527                  * Because we can shuffle loop IDs around and we
1528                  * update different sessions non-atomically, we might
1529                  * have overwritten this session's old loop ID
1530                  * already, and we might end up overwriting some other
1531                  * session that will be updated later.  So we have to
1532                  * be extra careful and we can't warn about those things...
1533                  */
1534                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1535                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1536
1537                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1538
1539                 sess->loop_id = loop_id;
1540         }
1541
1542         if (sess->d_id.b24 != s_id.b24) {
1543                 key = (((u32) sess->d_id.b.domain << 16) |
1544                        ((u32) sess->d_id.b.area   <<  8) |
1545                        ((u32) sess->d_id.b.al_pa));
1546
1547                 if (btree_lookup32(&lport->lport_fcport_map, key))
1548                         WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1549                             se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1550                             sess->d_id.b.domain, sess->d_id.b.area,
1551                             sess->d_id.b.al_pa);
1552                 else
1553                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1554                              sess->d_id.b.domain, sess->d_id.b.area,
1555                              sess->d_id.b.al_pa);
1556
1557                 key = (((u32) s_id.b.domain << 16) |
1558                        ((u32) s_id.b.area   <<  8) |
1559                        ((u32) s_id.b.al_pa));
1560
1561                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1562                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1563                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1564                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1565                 } else {
1566                         btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1567                             GFP_ATOMIC);
1568                 }
1569
1570                 sess->d_id = s_id;
1571                 nacl->nport_id = key;
1572         }
1573
1574         sess->conf_compl_supported = conf_compl_supported;
1575
1576 }
1577
1578 /*
1579  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1580  */
1581 static const struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1582         .find_cmd_by_tag        = tcm_qla2xxx_find_cmd_by_tag,
1583         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1584         .handle_data            = tcm_qla2xxx_handle_data,
1585         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1586         .get_cmd                = tcm_qla2xxx_get_cmd,
1587         .rel_cmd                = tcm_qla2xxx_rel_cmd,
1588         .free_cmd               = tcm_qla2xxx_free_cmd,
1589         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1590         .free_session           = tcm_qla2xxx_free_session,
1591         .update_sess            = tcm_qla2xxx_update_sess,
1592         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1593         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1594         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1595         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1596         .put_sess               = tcm_qla2xxx_put_sess,
1597         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1598         .get_dif_tags           = tcm_qla2xxx_dif_tags,
1599         .chk_dif_tags           = tcm_qla2xxx_chk_dif_tags,
1600 };
1601
1602 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1603 {
1604         int rc;
1605
1606         rc = btree_init32(&lport->lport_fcport_map);
1607         if (rc) {
1608                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1609                 return rc;
1610         }
1611
1612         lport->lport_loopid_map =
1613                 vzalloc(array_size(65536,
1614                                    sizeof(struct tcm_qla2xxx_fc_loopid)));
1615         if (!lport->lport_loopid_map) {
1616                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1617                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1618                 btree_destroy32(&lport->lport_fcport_map);
1619                 return -ENOMEM;
1620         }
1621         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1622                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1623         return 0;
1624 }
1625
1626 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1627                                          void *target_lport_ptr,
1628                                          u64 npiv_wwpn, u64 npiv_wwnn)
1629 {
1630         struct qla_hw_data *ha = vha->hw;
1631         struct tcm_qla2xxx_lport *lport =
1632                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1633         /*
1634          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1635          */
1636         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1637         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1638         lport->qla_vha = vha;
1639
1640         return 0;
1641 }
1642
1643 static struct se_wwn *tcm_qla2xxx_make_lport(
1644         struct target_fabric_configfs *tf,
1645         struct config_group *group,
1646         const char *name)
1647 {
1648         struct tcm_qla2xxx_lport *lport;
1649         u64 wwpn;
1650         int ret = -ENODEV;
1651
1652         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1653                 return ERR_PTR(-EINVAL);
1654
1655         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1656         if (!lport) {
1657                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1658                 return ERR_PTR(-ENOMEM);
1659         }
1660         lport->lport_wwpn = wwpn;
1661         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1662                                 wwpn);
1663         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1664
1665         ret = tcm_qla2xxx_init_lport(lport);
1666         if (ret != 0)
1667                 goto out;
1668
1669         ret = qlt_lport_register(lport, wwpn, 0, 0,
1670                                  tcm_qla2xxx_lport_register_cb);
1671         if (ret != 0)
1672                 goto out_lport;
1673
1674         return &lport->lport_wwn;
1675 out_lport:
1676         vfree(lport->lport_loopid_map);
1677         btree_destroy32(&lport->lport_fcport_map);
1678 out:
1679         kfree(lport);
1680         return ERR_PTR(ret);
1681 }
1682
1683 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1684 {
1685         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1686                         struct tcm_qla2xxx_lport, lport_wwn);
1687         struct scsi_qla_host *vha = lport->qla_vha;
1688         struct se_node_acl *node;
1689         u32 key = 0;
1690
1691         /*
1692          * Call into qla2x_target.c LLD logic to complete the
1693          * shutdown of struct qla_tgt after the call to
1694          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1695          */
1696         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1697                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1698
1699         qlt_lport_deregister(vha);
1700
1701         vfree(lport->lport_loopid_map);
1702         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1703                 btree_remove32(&lport->lport_fcport_map, key);
1704         btree_destroy32(&lport->lport_fcport_map);
1705         kfree(lport);
1706 }
1707
1708 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1709                                               void *target_lport_ptr,
1710                                               u64 npiv_wwpn, u64 npiv_wwnn)
1711 {
1712         struct fc_vport *vport;
1713         struct Scsi_Host *sh = base_vha->host;
1714         struct scsi_qla_host *npiv_vha;
1715         struct tcm_qla2xxx_lport *lport =
1716                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1717         struct tcm_qla2xxx_lport *base_lport =
1718                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1719         struct fc_vport_identifiers vport_id;
1720
1721         if (qla_ini_mode_enabled(base_vha)) {
1722                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1723                 return -EPERM;
1724         }
1725
1726         if (!base_lport || !base_lport->tpg_1 ||
1727             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1728                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1729                 return -EPERM;
1730         }
1731
1732         memset(&vport_id, 0, sizeof(vport_id));
1733         vport_id.port_name = npiv_wwpn;
1734         vport_id.node_name = npiv_wwnn;
1735         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1736         vport_id.vport_type = FC_PORTTYPE_NPIV;
1737         vport_id.disable = false;
1738
1739         vport = fc_vport_create(sh, 0, &vport_id);
1740         if (!vport) {
1741                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1742                 return -ENODEV;
1743         }
1744         /*
1745          * Setup local pointer to NPIV vhba + target_lport_ptr
1746          */
1747         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1748         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1749         lport->qla_vha = npiv_vha;
1750         scsi_host_get(npiv_vha->host);
1751         return 0;
1752 }
1753
1754
1755 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1756         struct target_fabric_configfs *tf,
1757         struct config_group *group,
1758         const char *name)
1759 {
1760         struct tcm_qla2xxx_lport *lport;
1761         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1762         char *p, tmp[128];
1763         int ret;
1764
1765         snprintf(tmp, 128, "%s", name);
1766
1767         p = strchr(tmp, '@');
1768         if (!p) {
1769                 pr_err("Unable to locate NPIV '@' separator\n");
1770                 return ERR_PTR(-EINVAL);
1771         }
1772         *p++ = '\0';
1773
1774         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1775                 return ERR_PTR(-EINVAL);
1776
1777         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1778                                        &npiv_wwpn, &npiv_wwnn) < 0)
1779                 return ERR_PTR(-EINVAL);
1780
1781         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1782         if (!lport) {
1783                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1784                 return ERR_PTR(-ENOMEM);
1785         }
1786         lport->lport_npiv_wwpn = npiv_wwpn;
1787         lport->lport_npiv_wwnn = npiv_wwnn;
1788         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1789
1790         ret = tcm_qla2xxx_init_lport(lport);
1791         if (ret != 0)
1792                 goto out;
1793
1794         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1795                                  tcm_qla2xxx_lport_register_npiv_cb);
1796         if (ret != 0)
1797                 goto out_lport;
1798
1799         return &lport->lport_wwn;
1800 out_lport:
1801         vfree(lport->lport_loopid_map);
1802         btree_destroy32(&lport->lport_fcport_map);
1803 out:
1804         kfree(lport);
1805         return ERR_PTR(ret);
1806 }
1807
1808 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1809 {
1810         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1811                         struct tcm_qla2xxx_lport, lport_wwn);
1812         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1813         struct qla_hw_data *ha = npiv_vha->hw;
1814         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1815
1816         scsi_host_put(npiv_vha->host);
1817         /*
1818          * Notify libfc that we want to release the vha->fc_vport
1819          */
1820         fc_vport_terminate(npiv_vha->fc_vport);
1821         scsi_host_put(base_vha->host);
1822         kfree(lport);
1823 }
1824
1825
1826 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1827                 char *page)
1828 {
1829         return sprintf(page,
1830             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on %s\n",
1831             QLA2XXX_VERSION, utsname()->sysname,
1832             utsname()->machine, utsname()->release);
1833 }
1834
1835 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1836
1837 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1838         &tcm_qla2xxx_wwn_attr_version,
1839         NULL,
1840 };
1841
1842 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1843         .module                         = THIS_MODULE,
1844         .fabric_name                    = "qla2xxx",
1845         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1846         /*
1847          * XXX: Limit assumes single page per scatter-gather-list entry.
1848          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1849          */
1850         .max_data_sg_nents              = 1200,
1851         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1852         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1853         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1854         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1855         .tpg_check_demo_mode_write_protect =
1856                                         tcm_qla2xxx_check_demo_write_protect,
1857         .tpg_check_prod_mode_write_protect =
1858                                         tcm_qla2xxx_check_prod_write_protect,
1859         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1860         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1861         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1862         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1863         .release_cmd                    = tcm_qla2xxx_release_cmd,
1864         .close_session                  = tcm_qla2xxx_close_session,
1865         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1866         .sess_get_initiator_sid         = NULL,
1867         .write_pending                  = tcm_qla2xxx_write_pending,
1868         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1869         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1870         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1871         .queue_status                   = tcm_qla2xxx_queue_status,
1872         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1873         .aborted_task                   = tcm_qla2xxx_aborted_task,
1874         /*
1875          * Setup function pointers for generic logic in
1876          * target_core_fabric_configfs.c
1877          */
1878         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1879         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1880         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1881         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1882         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1883
1884         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1885         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1886         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1887 };
1888
1889 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1890         .module                         = THIS_MODULE,
1891         .fabric_name                    = "qla2xxx_npiv",
1892         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1893         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1894         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1895         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1896         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1897         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1898         .tpg_check_prod_mode_write_protect =
1899             tcm_qla2xxx_check_prod_write_protect,
1900         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1901         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1902         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1903         .release_cmd                    = tcm_qla2xxx_release_cmd,
1904         .close_session                  = tcm_qla2xxx_close_session,
1905         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1906         .sess_get_initiator_sid         = NULL,
1907         .write_pending                  = tcm_qla2xxx_write_pending,
1908         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1909         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1910         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1911         .queue_status                   = tcm_qla2xxx_queue_status,
1912         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1913         .aborted_task                   = tcm_qla2xxx_aborted_task,
1914         /*
1915          * Setup function pointers for generic logic in
1916          * target_core_fabric_configfs.c
1917          */
1918         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1919         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1920         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1921         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1922         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1923
1924         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1925         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1926 };
1927
1928 static int tcm_qla2xxx_register_configfs(void)
1929 {
1930         int ret;
1931
1932         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on %s\n",
1933             QLA2XXX_VERSION, utsname()->sysname,
1934             utsname()->machine, utsname()->release);
1935
1936         ret = target_register_template(&tcm_qla2xxx_ops);
1937         if (ret)
1938                 return ret;
1939
1940         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1941         if (ret)
1942                 goto out_fabric;
1943
1944         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1945                                                 WQ_MEM_RECLAIM, 0);
1946         if (!tcm_qla2xxx_free_wq) {
1947                 ret = -ENOMEM;
1948                 goto out_fabric_npiv;
1949         }
1950
1951         return 0;
1952
1953 out_fabric_npiv:
1954         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1955 out_fabric:
1956         target_unregister_template(&tcm_qla2xxx_ops);
1957         return ret;
1958 }
1959
1960 static void tcm_qla2xxx_deregister_configfs(void)
1961 {
1962         destroy_workqueue(tcm_qla2xxx_free_wq);
1963
1964         target_unregister_template(&tcm_qla2xxx_ops);
1965         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1966 }
1967
1968 static int __init tcm_qla2xxx_init(void)
1969 {
1970         int ret;
1971
1972         BUILD_BUG_ON(sizeof(struct abts_recv_from_24xx) != 64);
1973         BUILD_BUG_ON(sizeof(struct abts_resp_from_24xx_fw) != 64);
1974         BUILD_BUG_ON(sizeof(struct atio7_fcp_cmnd) != 32);
1975         BUILD_BUG_ON(sizeof(struct atio_from_isp) != 64);
1976         BUILD_BUG_ON(sizeof(struct ba_acc_le) != 12);
1977         BUILD_BUG_ON(sizeof(struct ba_rjt_le) != 4);
1978         BUILD_BUG_ON(sizeof(struct ctio7_from_24xx) != 64);
1979         BUILD_BUG_ON(sizeof(struct ctio7_to_24xx) != 64);
1980         BUILD_BUG_ON(sizeof(struct ctio_crc2_to_fw) != 64);
1981         BUILD_BUG_ON(sizeof(struct ctio_crc_from_fw) != 64);
1982         BUILD_BUG_ON(sizeof(struct ctio_to_2xxx) != 64);
1983         BUILD_BUG_ON(sizeof(struct fcp_hdr) != 24);
1984         BUILD_BUG_ON(sizeof(struct fcp_hdr_le) != 24);
1985         BUILD_BUG_ON(sizeof(struct nack_to_isp) != 64);
1986
1987         ret = tcm_qla2xxx_register_configfs();
1988         if (ret < 0)
1989                 return ret;
1990
1991         return 0;
1992 }
1993
1994 static void __exit tcm_qla2xxx_exit(void)
1995 {
1996         tcm_qla2xxx_deregister_configfs();
1997 }
1998
1999 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
2000 MODULE_LICENSE("GPL");
2001 module_init(tcm_qla2xxx_init);
2002 module_exit(tcm_qla2xxx_exit);