kernel/drivers/scsi/qla2xxx/tcm_qla2xxx.c

   1 /*******************************************************************************
   2  * This file contains tcm implementation using v4 configfs fabric infrastructure
   3  * for QLogic target mode HBAs
   4  *
   5  * (c) Copyright 2010-2013 Datera, Inc.
   6  *
   7  * Author: Nicholas A. Bellinger <nab@daterainc.com>
   8  *
   9  * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
  10  * the TCM_FC / Open-FCoE.org fabric module.
  11  *
  12  * Copyright (c) 2010 Cisco Systems, Inc
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  ****************************************************************************/
  24
  25
  26 #include <linux/module.h>
  27 #include <linux/moduleparam.h>
  28 #include <generated/utsrelease.h>
  29 #include <linux/utsname.h>
  30 #include <linux/vmalloc.h>
  31 #include <linux/init.h>
  32 #include <linux/list.h>
  33 #include <linux/slab.h>
  34 #include <linux/kthread.h>
  35 #include <linux/types.h>
  36 #include <linux/string.h>
  37 #include <linux/configfs.h>
  38 #include <linux/ctype.h>
  39 #include <asm/unaligned.h>
  40 #include <scsi/scsi.h>
  41 #include <scsi/scsi_host.h>
  42 #include <scsi/scsi_device.h>
  43 #include <scsi/scsi_cmnd.h>
  44 #include <target/target_core_base.h>
  45 #include <target/target_core_fabric.h>
  46
  47 #include "qla_def.h"
  48 #include "qla_target.h"
  49 #include "tcm_qla2xxx.h"
  50
  51 static struct workqueue_struct *tcm_qla2xxx_free_wq;
  52 static struct workqueue_struct *tcm_qla2xxx_cmd_wq;
  53
  54 /*
  55  * Parse WWN.
  56  * If strict, we require lower-case hex and colon separators to be sure
  57  * the name is the same as what would be generated by ft_format_wwn()
  58  * so the name and wwn are mapped one-to-one.
  59  */
  60 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
  61 {
  62         const char *cp;
  63         char c;
  64         u32 nibble;
  65         u32 byte = 0;
  66         u32 pos = 0;
  67         u32 err;
  68
  69         *wwn = 0;
  70         for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
  71                 c = *cp;
  72                 if (c == '\n' && cp[1] == '\0')
  73                         continue;
  74                 if (strict && pos++ == 2 && byte++ < 7) {
  75                         pos = 0;
  76                         if (c == ':')
  77                                 continue;
  78                         err = 1;
  79                         goto fail;
  80                 }
  81                 if (c == '\0') {
  82                         err = 2;
  83                         if (strict && byte != 8)
  84                                 goto fail;
  85                         return cp - name;
  86                 }
  87                 err = 3;
  88                 if (isdigit(c))
  89                         nibble = c - '0';
  90                 else if (isxdigit(c) && (islower(c) || !strict))
  91                         nibble = tolower(c) - 'a' + 10;
  92                 else
  93                         goto fail;
  94                 *wwn = (*wwn << 4) | nibble;
  95         }
  96         err = 4;
  97 fail:
  98         pr_debug("err %u len %zu pos %u byte %u\n",
  99                         err, cp - name, pos, byte);
 100         return -1;
 101 }
 102
 103 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
 104 {
 105         u8 b[8];
 106
 107         put_unaligned_be64(wwn, b);
 108         return snprintf(buf, len,
 109                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 110                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
 111 }
 112
 113 static char *tcm_qla2xxx_get_fabric_name(void)
 114 {
 115         return "qla2xxx";
 116 }
 117
 118 /*
 119  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
 120  */
 121 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
 122 {
 123         unsigned int i, j;
 124         u8 wwn[8];
 125
 126         memset(wwn, 0, sizeof(wwn));
 127
 128         /* Validate and store the new name */
 129         for (i = 0, j = 0; i < 16; i++) {
 130                 int value;
 131
 132                 value = hex_to_bin(*ns++);
 133                 if (value >= 0)
 134                         j = (j << 4) | value;
 135                 else
 136                         return -EINVAL;
 137
 138                 if (i % 2) {
 139                         wwn[i/2] = j & 0xff;
 140                         j = 0;
 141                 }
 142         }
 143
 144         *nm = wwn_to_u64(wwn);
 145         return 0;
 146 }
 147
 148 /*
 149  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 150  * store_fc_host_vport_create()
 151  */
 152 static int tcm_qla2xxx_npiv_parse_wwn(
 153         const char *name,
 154         size_t count,
 155         u64 *wwpn,
 156         u64 *wwnn)
 157 {
 158         unsigned int cnt = count;
 159         int rc;
 160
 161         *wwpn = 0;
 162         *wwnn = 0;
 163
 164         /* count may include a LF at end of string */
 165         if (name[cnt-1] == '\n' || name[cnt-1] == 0)
 166                 cnt--;
 167
 168         /* validate we have enough characters for WWPN */
 169         if ((cnt != (16+1+16)) || (name[16] != ':'))
 170                 return -EINVAL;
 171
 172         rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
 173         if (rc != 0)
 174                 return rc;
 175
 176         rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
 177         if (rc != 0)
 178                 return rc;
 179
 180         return 0;
 181 }
 182
 183 static char *tcm_qla2xxx_npiv_get_fabric_name(void)
 184 {
 185         return "qla2xxx_npiv";
 186 }
 187
 188 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
 189 {
 190         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 191                                 struct tcm_qla2xxx_tpg, se_tpg);
 192         struct tcm_qla2xxx_lport *lport = tpg->lport;
 193
 194         return lport->lport_naa_name;
 195 }
 196
 197 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
 198 {
 199         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 200                                 struct tcm_qla2xxx_tpg, se_tpg);
 201         return tpg->lport_tpgt;
 202 }
 203
 204 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
 205 {
 206         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 207                                 struct tcm_qla2xxx_tpg, se_tpg);
 208
 209         return tpg->tpg_attrib.generate_node_acls;
 210 }
 211
 212 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
 213 {
 214         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 215                                 struct tcm_qla2xxx_tpg, se_tpg);
 216
 217         return tpg->tpg_attrib.cache_dynamic_acls;
 218 }
 219
 220 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
 221 {
 222         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 223                                 struct tcm_qla2xxx_tpg, se_tpg);
 224
 225         return tpg->tpg_attrib.demo_mode_write_protect;
 226 }
 227
 228 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
 229 {
 230         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 231                                 struct tcm_qla2xxx_tpg, se_tpg);
 232
 233         return tpg->tpg_attrib.prod_mode_write_protect;
 234 }
 235
 236 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
 237 {
 238         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 239                                 struct tcm_qla2xxx_tpg, se_tpg);
 240
 241         return tpg->tpg_attrib.demo_mode_login_only;
 242 }
 243
 244 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
 245 {
 246         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 247                                 struct tcm_qla2xxx_tpg, se_tpg);
 248
 249         return tpg->tpg_attrib.fabric_prot_type;
 250 }
 251
 252 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
 253 {
 254         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 255                                 struct tcm_qla2xxx_tpg, se_tpg);
 256
 257         return tpg->lport_tpgt;
 258 }
 259
 260 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
 261 {
 262         struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
 263                         struct qla_tgt_mgmt_cmd, free_work);
 264
 265         transport_generic_free_cmd(&mcmd->se_cmd, 0);
 266 }
 267
 268 /*
 269  * Called from qla_target_template->free_mcmd(), and will call
 270  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 271  * release callback.  qla_hw_data->hardware_lock is expected to be held
 272  */
 273 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
 274 {
 275         INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
 276         queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
 277 }
 278
 279 static void tcm_qla2xxx_complete_free(struct work_struct *work)
 280 {
 281         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 282
 283         cmd->cmd_in_wq = 0;
 284
 285         WARN_ON(cmd->cmd_flags &  BIT_16);
 286
 287         cmd->cmd_flags |= BIT_16;
 288         transport_generic_free_cmd(&cmd->se_cmd, 0);
 289 }
 290
 291 /*
 292  * Called from qla_target_template->free_cmd(), and will call
 293  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 294  * release callback.  qla_hw_data->hardware_lock is expected to be held
 295  */
 296 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 297 {
 298         cmd->cmd_in_wq = 1;
 299         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 300         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 301 }
 302
 303 /*
 304  * Called from struct target_core_fabric_ops->check_stop_free() context
 305  */
 306 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 307 {
 308         struct qla_tgt_cmd *cmd;
 309
 310         if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 311                 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 312                 cmd->cmd_flags |= BIT_14;
 313         }
 314
 315         return target_put_sess_cmd(se_cmd);
 316 }
 317
 318 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 319  * fabric descriptor @se_cmd command to release
 320  */
 321 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 322 {
 323         struct qla_tgt_cmd *cmd;
 324
 325         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 326                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 327                                 struct qla_tgt_mgmt_cmd, se_cmd);
 328                 qlt_free_mcmd(mcmd);
 329                 return;
 330         }
 331
 332         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 333         qlt_free_cmd(cmd);
 334 }
 335
 336 static int tcm_qla2xxx_shutdown_session(struct se_session *se_sess)
 337 {
 338         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 339         struct scsi_qla_host *vha;
 340         unsigned long flags;
 341
 342         BUG_ON(!sess);
 343         vha = sess->vha;
 344
 345         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
 346         target_sess_cmd_list_set_waiting(se_sess);
 347         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
 348
 349         return 1;
 350 }
 351
 352 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 353 {
 354         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 355         struct scsi_qla_host *vha;
 356         unsigned long flags;
 357
 358         BUG_ON(!sess);
 359         vha = sess->vha;
 360
 361         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
 362         qlt_unreg_sess(sess);
 363         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
 364 }
 365
 366 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 367 {
 368         return 0;
 369 }
 370
 371 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 372 {
 373         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 374                                 struct qla_tgt_cmd, se_cmd);
 375         cmd->cmd_flags |= BIT_3;
 376         cmd->bufflen = se_cmd->data_length;
 377         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 378
 379         cmd->sg_cnt = se_cmd->t_data_nents;
 380         cmd->sg = se_cmd->t_data_sg;
 381
 382         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 383         cmd->prot_sg = se_cmd->t_prot_sg;
 384         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 385         se_cmd->pi_err = 0;
 386
 387         /*
 388          * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
 389          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 390          */
 391         return qlt_rdy_to_xfer(cmd);
 392 }
 393
 394 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
 395 {
 396         unsigned long flags;
 397         /*
 398          * Check for WRITE_PENDING status to determine if we need to wait for
 399          * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
 400          */
 401         spin_lock_irqsave(&se_cmd->t_state_lock, flags);
 402         if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
 403             se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
 404                 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 405                 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
 406                                             3 * HZ);
 407                 return 0;
 408         }
 409         spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 410
 411         return 0;
 412 }
 413
 414 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 415 {
 416         return;
 417 }
 418
 419 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 420 {
 421         if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
 422                 struct qla_tgt_cmd *cmd = container_of(se_cmd,
 423                                 struct qla_tgt_cmd, se_cmd);
 424                 return cmd->state;
 425         }
 426
 427         return 0;
 428 }
 429
 430 /*
 431  * Called from process context in qla_target.c:qlt_do_work() code
 432  */
 433 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 434         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 435         int data_dir, int bidi)
 436 {
 437         struct se_cmd *se_cmd = &cmd->se_cmd;
 438         struct se_session *se_sess;
 439         struct qla_tgt_sess *sess;
 440         int flags = TARGET_SCF_ACK_KREF;
 441
 442         if (bidi)
 443                 flags |= TARGET_SCF_BIDI_OP;
 444
 445         sess = cmd->sess;
 446         if (!sess) {
 447                 pr_err("Unable to locate struct qla_tgt_sess from qla_tgt_cmd\n");
 448                 return -EINVAL;
 449         }
 450
 451         se_sess = sess->se_sess;
 452         if (!se_sess) {
 453                 pr_err("Unable to locate active struct se_session\n");
 454                 return -EINVAL;
 455         }
 456
 457         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 458                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 459                                 data_dir, flags);
 460 }
 461
 462 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 463 {
 464         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 465
 466         /*
 467          * Ensure that the complete FCP WRITE payload has been received.
 468          * Otherwise return an exception via CHECK_CONDITION status.
 469          */
 470         cmd->cmd_in_wq = 0;
 471         cmd->cmd_flags |= BIT_11;
 472         if (!cmd->write_data_transferred) {
 473                 /*
 474                  * Check if se_cmd has already been aborted via LUN_RESET, and
 475                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
 476                  */
 477                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
 478                         complete(&cmd->se_cmd.t_transport_stop_comp);
 479                         return;
 480                 }
 481
 482                 if (cmd->se_cmd.pi_err)
 483                         transport_generic_request_failure(&cmd->se_cmd,
 484                                 cmd->se_cmd.pi_err);
 485                 else
 486                         transport_generic_request_failure(&cmd->se_cmd,
 487                                 TCM_CHECK_CONDITION_ABORT_CMD);
 488
 489                 return;
 490         }
 491
 492         return target_execute_cmd(&cmd->se_cmd);
 493 }
 494
 495 /*
 496  * Called from qla_target.c:qlt_do_ctio_completion()
 497  */
 498 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 499 {
 500         cmd->cmd_flags |= BIT_10;
 501         cmd->cmd_in_wq = 1;
 502         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 503         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 504 }
 505
 506 static void tcm_qla2xxx_handle_dif_work(struct work_struct *work)
 507 {
 508         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 509
 510         /* take an extra kref to prevent cmd free too early.
 511          * need to wait for SCSI status/check condition to
 512          * finish responding generate by transport_generic_request_failure.
 513          */
 514         kref_get(&cmd->se_cmd.cmd_kref);
 515         transport_generic_request_failure(&cmd->se_cmd, cmd->se_cmd.pi_err);
 516 }
 517
 518 /*
 519  * Called from qla_target.c:qlt_do_ctio_completion()
 520  */
 521 static void tcm_qla2xxx_handle_dif_err(struct qla_tgt_cmd *cmd)
 522 {
 523         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_dif_work);
 524         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 525 }
 526
 527 /*
 528  * Called from qla_target.c:qlt_issue_task_mgmt()
 529  */
 530 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
 531         uint8_t tmr_func, uint32_t tag)
 532 {
 533         struct qla_tgt_sess *sess = mcmd->sess;
 534         struct se_cmd *se_cmd = &mcmd->se_cmd;
 535
 536         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 537                         tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
 538 }
 539
 540 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 541 {
 542         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 543                                 struct qla_tgt_cmd, se_cmd);
 544
 545         cmd->cmd_flags |= BIT_4;
 546         cmd->bufflen = se_cmd->data_length;
 547         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 548
 549         cmd->sg_cnt = se_cmd->t_data_nents;
 550         cmd->sg = se_cmd->t_data_sg;
 551         cmd->offset = 0;
 552
 553         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 554         cmd->prot_sg = se_cmd->t_prot_sg;
 555         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 556         se_cmd->pi_err = 0;
 557
 558         /*
 559          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 560          */
 561         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 562                                 se_cmd->scsi_status);
 563 }
 564
 565 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 566 {
 567         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 568                                 struct qla_tgt_cmd, se_cmd);
 569         int xmit_type = QLA_TGT_XMIT_STATUS;
 570
 571         cmd->bufflen = se_cmd->data_length;
 572         cmd->sg = NULL;
 573         cmd->sg_cnt = 0;
 574         cmd->offset = 0;
 575         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 576         if (cmd->cmd_flags &  BIT_5) {
 577                 pr_crit("Bit_5 already set for cmd = %p.\n", cmd);
 578                 dump_stack();
 579         }
 580         cmd->cmd_flags |= BIT_5;
 581
 582         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 583                 /*
 584                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 585                  * for qla_tgt_xmit_response LLD code
 586                  */
 587                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 588                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 589                         se_cmd->residual_count = 0;
 590                 }
 591                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 592                 se_cmd->residual_count += se_cmd->data_length;
 593
 594                 cmd->bufflen = 0;
 595         }
 596         /*
 597          * Now queue status response to qla2xxx LLD code and response ring
 598          */
 599         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 600 }
 601
 602 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 603 {
 604         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 605         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 606                                 struct qla_tgt_mgmt_cmd, se_cmd);
 607
 608         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 609                         mcmd, se_tmr->function, se_tmr->response);
 610         /*
 611          * Do translation between TCM TM response codes and
 612          * QLA2xxx FC TM response codes.
 613          */
 614         switch (se_tmr->response) {
 615         case TMR_FUNCTION_COMPLETE:
 616                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 617                 break;
 618         case TMR_TASK_DOES_NOT_EXIST:
 619                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 620                 break;
 621         case TMR_FUNCTION_REJECTED:
 622                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 623                 break;
 624         case TMR_LUN_DOES_NOT_EXIST:
 625         default:
 626                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 627                 break;
 628         }
 629         /*
 630          * Queue the TM response to QLA2xxx LLD to build a
 631          * CTIO response packet.
 632          */
 633         qlt_xmit_tm_rsp(mcmd);
 634 }
 635
 636 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 637 {
 638         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 639                                 struct qla_tgt_cmd, se_cmd);
 640         qlt_abort_cmd(cmd);
 641 }
 642
 643 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 644                         struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *);
 645 /*
 646  * Expected to be called with struct qla_hw_data->hardware_lock held
 647  */
 648 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
 649 {
 650         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 651         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 652         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 653         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 654                                 struct tcm_qla2xxx_lport, lport_wwn);
 655         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 656                                 struct tcm_qla2xxx_nacl, se_node_acl);
 657         void *node;
 658
 659         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 660
 661         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 662         if (WARN_ON(node && (node != se_nacl))) {
 663                 /*
 664                  * The nacl no longer matches what we think it should be.
 665                  * Most likely a new dynamic acl has been added while
 666                  * someone dropped the hardware lock.  It clearly is a
 667                  * bug elsewhere, but this bit can't make things worse.
 668                  */
 669                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 670                                node, GFP_ATOMIC);
 671         }
 672
 673         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 674             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 675         /*
 676          * Now clear the se_nacl and session pointers from our HW lport lookup
 677          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 678          *
 679          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 680          * target_wait_for_sess_cmds() before the session waits for outstanding
 681          * I/O to complete, to avoid a race between session shutdown execution
 682          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 683          */
 684         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 685 }
 686
 687 static void tcm_qla2xxx_release_session(struct kref *kref)
 688 {
 689         struct se_session *se_sess = container_of(kref,
 690                         struct se_session, sess_kref);
 691
 692         qlt_unreg_sess(se_sess->fabric_sess_ptr);
 693 }
 694
 695 static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess)
 696 {
 697         if (!sess)
 698                 return;
 699
 700         assert_spin_locked(&sess->vha->hw->hardware_lock);
 701         kref_put(&sess->se_sess->sess_kref, tcm_qla2xxx_release_session);
 702 }
 703
 704 static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess)
 705 {
 706         assert_spin_locked(&sess->vha->hw->hardware_lock);
 707         target_sess_cmd_list_set_waiting(sess->se_sess);
 708 }
 709
 710 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 711                 const char *name)
 712 {
 713         struct tcm_qla2xxx_nacl *nacl =
 714                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 715         u64 wwnn;
 716
 717         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 718                 return -EINVAL;
 719
 720         nacl->nport_wwnn = wwnn;
 721         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 722
 723         return 0;
 724 }
 725
 726 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 727
 728 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 729                                                                         \
 730 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
 731                 struct config_item *item, char *page)                   \
 732 {                                                                       \
 733         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 734         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 735                         struct tcm_qla2xxx_tpg, se_tpg);                \
 736                                                                         \
 737         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
 738 }                                                                       \
 739                                                                         \
 740 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
 741                 struct config_item *item, const char *page, size_t count) \
 742 {                                                                       \
 743         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 744         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 745                         struct tcm_qla2xxx_tpg, se_tpg);                \
 746         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 747         unsigned long val;                                              \
 748         int ret;                                                        \
 749                                                                         \
 750         ret = kstrtoul(page, 0, &val);                                  \
 751         if (ret < 0) {                                                  \
 752                 pr_err("kstrtoul() failed with"                         \
 753                                 " ret: %d\n", ret);                     \
 754                 return -EINVAL;                                         \
 755         }                                                               \
 756                                                                         \
 757         if ((val != 0) && (val != 1)) {                                 \
 758                 pr_err("Illegal boolean value %lu\n", val);             \
 759                 return -EINVAL;                                         \
 760         }                                                               \
 761                                                                         \
 762         a->name = val;                                                  \
 763                                                                         \
 764         return count;                                                   \
 765 }                                                                       \
 766 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 767
 768 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 769 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 770 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 771 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 772 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 773
 774 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 775         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 776         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 777         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 778         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 779         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 780         NULL,
 781 };
 782
 783 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 784
 785 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
 786                 char *page)
 787 {
 788         struct se_portal_group *se_tpg = to_tpg(item);
 789         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 790                         struct tcm_qla2xxx_tpg, se_tpg);
 791
 792         return snprintf(page, PAGE_SIZE, "%d\n",
 793                         atomic_read(&tpg->lport_tpg_enabled));
 794 }
 795
 796 static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
 797 {
 798         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 799                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 800         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 801         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 802
 803         if (!target_depend_item(&se_tpg->tpg_group.cg_item)) {
 804                 atomic_set(&base_tpg->lport_tpg_enabled, 1);
 805                 qlt_enable_vha(base_vha);
 806         }
 807         complete(&base_tpg->tpg_base_comp);
 808 }
 809
 810 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
 811 {
 812         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 813                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 814         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 815         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 816
 817         if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
 818                 atomic_set(&base_tpg->lport_tpg_enabled, 0);
 819                 target_undepend_item(&se_tpg->tpg_group.cg_item);
 820         }
 821         complete(&base_tpg->tpg_base_comp);
 822 }
 823
 824 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
 825                 const char *page, size_t count)
 826 {
 827         struct se_portal_group *se_tpg = to_tpg(item);
 828         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 829                         struct tcm_qla2xxx_tpg, se_tpg);
 830         unsigned long op;
 831         int rc;
 832
 833         rc = kstrtoul(page, 0, &op);
 834         if (rc < 0) {
 835                 pr_err("kstrtoul() returned %d\n", rc);
 836                 return -EINVAL;
 837         }
 838         if ((op != 1) && (op != 0)) {
 839                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 840                 return -EINVAL;
 841         }
 842         if (op) {
 843                 if (atomic_read(&tpg->lport_tpg_enabled))
 844                         return -EEXIST;
 845
 846                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
 847         } else {
 848                 if (!atomic_read(&tpg->lport_tpg_enabled))
 849                         return count;
 850
 851                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
 852         }
 853         init_completion(&tpg->tpg_base_comp);
 854         schedule_work(&tpg->tpg_base_work);
 855         wait_for_completion(&tpg->tpg_base_comp);
 856
 857         if (op) {
 858                 if (!atomic_read(&tpg->lport_tpg_enabled))
 859                         return -ENODEV;
 860         } else {
 861                 if (atomic_read(&tpg->lport_tpg_enabled))
 862                         return -EPERM;
 863         }
 864         return count;
 865 }
 866
 867 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
 868                 char *page)
 869 {
 870         return target_show_dynamic_sessions(to_tpg(item), page);
 871 }
 872
 873 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
 874                 const char *page, size_t count)
 875 {
 876         struct se_portal_group *se_tpg = to_tpg(item);
 877         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 878                                 struct tcm_qla2xxx_tpg, se_tpg);
 879         unsigned long val;
 880         int ret = kstrtoul(page, 0, &val);
 881
 882         if (ret) {
 883                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
 884                 return ret;
 885         }
 886         if (val != 0 && val != 1 && val != 3) {
 887                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
 888                 return -EINVAL;
 889         }
 890         tpg->tpg_attrib.fabric_prot_type = val;
 891
 892         return count;
 893 }
 894
 895 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
 896                 char *page)
 897 {
 898         struct se_portal_group *se_tpg = to_tpg(item);
 899         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 900                                 struct tcm_qla2xxx_tpg, se_tpg);
 901
 902         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
 903 }
 904
 905 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
 906 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
 907 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
 908
 909 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
 910         &tcm_qla2xxx_tpg_attr_enable,
 911         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
 912         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
 913         NULL,
 914 };
 915
 916 static struct se_portal_group *tcm_qla2xxx_make_tpg(
 917         struct se_wwn *wwn,
 918         struct config_group *group,
 919         const char *name)
 920 {
 921         struct tcm_qla2xxx_lport *lport = container_of(wwn,
 922                         struct tcm_qla2xxx_lport, lport_wwn);
 923         struct tcm_qla2xxx_tpg *tpg;
 924         unsigned long tpgt;
 925         int ret;
 926
 927         if (strstr(name, "tpgt_") != name)
 928                 return ERR_PTR(-EINVAL);
 929         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
 930                 return ERR_PTR(-EINVAL);
 931
 932         if ((tpgt != 1)) {
 933                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
 934                 return ERR_PTR(-ENOSYS);
 935         }
 936
 937         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
 938         if (!tpg) {
 939                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
 940                 return ERR_PTR(-ENOMEM);
 941         }
 942         tpg->lport = lport;
 943         tpg->lport_tpgt = tpgt;
 944         /*
 945          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
 946          * NodeACLs
 947          */
 948         tpg->tpg_attrib.generate_node_acls = 1;
 949         tpg->tpg_attrib.demo_mode_write_protect = 1;
 950         tpg->tpg_attrib.cache_dynamic_acls = 1;
 951         tpg->tpg_attrib.demo_mode_login_only = 1;
 952
 953         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
 954         if (ret < 0) {
 955                 kfree(tpg);
 956                 return NULL;
 957         }
 958
 959         lport->tpg_1 = tpg;
 960
 961         return &tpg->se_tpg;
 962 }
 963
 964 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
 965 {
 966         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 967                         struct tcm_qla2xxx_tpg, se_tpg);
 968         struct tcm_qla2xxx_lport *lport = tpg->lport;
 969         struct scsi_qla_host *vha = lport->qla_vha;
 970         /*
 971          * Call into qla2x_target.c LLD logic to shutdown the active
 972          * FC Nexuses and disable target mode operation for this qla_hw_data
 973          */
 974         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
 975                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
 976
 977         core_tpg_deregister(se_tpg);
 978         /*
 979          * Clear local TPG=1 pointer for non NPIV mode.
 980          */
 981         lport->tpg_1 = NULL;
 982         kfree(tpg);
 983 }
 984
 985 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
 986                 char *page)
 987 {
 988         return tcm_qla2xxx_tpg_enable_show(item, page);
 989 }
 990
 991 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
 992                 const char *page, size_t count)
 993 {
 994         struct se_portal_group *se_tpg = to_tpg(item);
 995         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 996         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 997                         struct tcm_qla2xxx_lport, lport_wwn);
 998         struct scsi_qla_host *vha = lport->qla_vha;
 999         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1000                         struct tcm_qla2xxx_tpg, se_tpg);
1001         unsigned long op;
1002         int rc;
1003
1004         rc = kstrtoul(page, 0, &op);
1005         if (rc < 0) {
1006                 pr_err("kstrtoul() returned %d\n", rc);
1007                 return -EINVAL;
1008         }
1009         if ((op != 1) && (op != 0)) {
1010                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1011                 return -EINVAL;
1012         }
1013         if (op) {
1014                 if (atomic_read(&tpg->lport_tpg_enabled))
1015                         return -EEXIST;
1016
1017                 atomic_set(&tpg->lport_tpg_enabled, 1);
1018                 qlt_enable_vha(vha);
1019         } else {
1020                 if (!atomic_read(&tpg->lport_tpg_enabled))
1021                         return count;
1022
1023                 atomic_set(&tpg->lport_tpg_enabled, 0);
1024                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1025         }
1026
1027         return count;
1028 }
1029
1030 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1031
1032 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1033         &tcm_qla2xxx_npiv_tpg_attr_enable,
1034         NULL,
1035 };
1036
1037 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1038         struct se_wwn *wwn,
1039         struct config_group *group,
1040         const char *name)
1041 {
1042         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1043                         struct tcm_qla2xxx_lport, lport_wwn);
1044         struct tcm_qla2xxx_tpg *tpg;
1045         unsigned long tpgt;
1046         int ret;
1047
1048         if (strstr(name, "tpgt_") != name)
1049                 return ERR_PTR(-EINVAL);
1050         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1051                 return ERR_PTR(-EINVAL);
1052
1053         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1054         if (!tpg) {
1055                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1056                 return ERR_PTR(-ENOMEM);
1057         }
1058         tpg->lport = lport;
1059         tpg->lport_tpgt = tpgt;
1060
1061         /*
1062          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1063          * NodeACLs
1064          */
1065         tpg->tpg_attrib.generate_node_acls = 1;
1066         tpg->tpg_attrib.demo_mode_write_protect = 1;
1067         tpg->tpg_attrib.cache_dynamic_acls = 1;
1068         tpg->tpg_attrib.demo_mode_login_only = 1;
1069
1070         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1071         if (ret < 0) {
1072                 kfree(tpg);
1073                 return NULL;
1074         }
1075         lport->tpg_1 = tpg;
1076         return &tpg->se_tpg;
1077 }
1078
1079 /*
1080  * Expected to be called with struct qla_hw_data->hardware_lock held
1081  */
1082 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_s_id(
1083         scsi_qla_host_t *vha,
1084         const uint8_t *s_id)
1085 {
1086         struct tcm_qla2xxx_lport *lport;
1087         struct se_node_acl *se_nacl;
1088         struct tcm_qla2xxx_nacl *nacl;
1089         u32 key;
1090
1091         lport = vha->vha_tgt.target_lport_ptr;
1092         if (!lport) {
1093                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1094                 dump_stack();
1095                 return NULL;
1096         }
1097
1098         key = sid_to_key(s_id);
1099         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1100
1101         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1102         if (!se_nacl) {
1103                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1104                 return NULL;
1105         }
1106         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1107             se_nacl, se_nacl->initiatorname);
1108
1109         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1110         if (!nacl->qla_tgt_sess) {
1111                 pr_err("Unable to locate struct qla_tgt_sess\n");
1112                 return NULL;
1113         }
1114
1115         return nacl->qla_tgt_sess;
1116 }
1117
1118 /*
1119  * Expected to be called with struct qla_hw_data->hardware_lock held
1120  */
1121 static void tcm_qla2xxx_set_sess_by_s_id(
1122         struct tcm_qla2xxx_lport *lport,
1123         struct se_node_acl *new_se_nacl,
1124         struct tcm_qla2xxx_nacl *nacl,
1125         struct se_session *se_sess,
1126         struct qla_tgt_sess *qla_tgt_sess,
1127         uint8_t *s_id)
1128 {
1129         u32 key;
1130         void *slot;
1131         int rc;
1132
1133         key = sid_to_key(s_id);
1134         pr_debug("set_sess_by_s_id: %06x\n", key);
1135
1136         slot = btree_lookup32(&lport->lport_fcport_map, key);
1137         if (!slot) {
1138                 if (new_se_nacl) {
1139                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1140                         nacl->nport_id = key;
1141                         rc = btree_insert32(&lport->lport_fcport_map, key,
1142                                         new_se_nacl, GFP_ATOMIC);
1143                         if (rc)
1144                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1145                                     (int)key);
1146                 } else {
1147                         pr_debug("Wiping nonexisting fc_port entry\n");
1148                 }
1149
1150                 qla_tgt_sess->se_sess = se_sess;
1151                 nacl->qla_tgt_sess = qla_tgt_sess;
1152                 return;
1153         }
1154
1155         if (nacl->qla_tgt_sess) {
1156                 if (new_se_nacl == NULL) {
1157                         pr_debug("Clearing existing nacl->qla_tgt_sess and fc_port entry\n");
1158                         btree_remove32(&lport->lport_fcport_map, key);
1159                         nacl->qla_tgt_sess = NULL;
1160                         return;
1161                 }
1162                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_port entry\n");
1163                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1164                 qla_tgt_sess->se_sess = se_sess;
1165                 nacl->qla_tgt_sess = qla_tgt_sess;
1166                 return;
1167         }
1168
1169         if (new_se_nacl == NULL) {
1170                 pr_debug("Clearing existing fc_port entry\n");
1171                 btree_remove32(&lport->lport_fcport_map, key);
1172                 return;
1173         }
1174
1175         pr_debug("Replacing existing fc_port entry w/o active nacl->qla_tgt_sess\n");
1176         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1177         qla_tgt_sess->se_sess = se_sess;
1178         nacl->qla_tgt_sess = qla_tgt_sess;
1179
1180         pr_debug("Setup nacl->qla_tgt_sess %p by s_id for se_nacl: %p, initiatorname: %s\n",
1181             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1182 }
1183
1184 /*
1185  * Expected to be called with struct qla_hw_data->hardware_lock held
1186  */
1187 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_loop_id(
1188         scsi_qla_host_t *vha,
1189         const uint16_t loop_id)
1190 {
1191         struct tcm_qla2xxx_lport *lport;
1192         struct se_node_acl *se_nacl;
1193         struct tcm_qla2xxx_nacl *nacl;
1194         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1195
1196         lport = vha->vha_tgt.target_lport_ptr;
1197         if (!lport) {
1198                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1199                 dump_stack();
1200                 return NULL;
1201         }
1202
1203         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1204
1205         fc_loopid = lport->lport_loopid_map + loop_id;
1206         se_nacl = fc_loopid->se_nacl;
1207         if (!se_nacl) {
1208                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1209                     loop_id);
1210                 return NULL;
1211         }
1212
1213         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1214
1215         if (!nacl->qla_tgt_sess) {
1216                 pr_err("Unable to locate struct qla_tgt_sess\n");
1217                 return NULL;
1218         }
1219
1220         return nacl->qla_tgt_sess;
1221 }
1222
1223 /*
1224  * Expected to be called with struct qla_hw_data->hardware_lock held
1225  */
1226 static void tcm_qla2xxx_set_sess_by_loop_id(
1227         struct tcm_qla2xxx_lport *lport,
1228         struct se_node_acl *new_se_nacl,
1229         struct tcm_qla2xxx_nacl *nacl,
1230         struct se_session *se_sess,
1231         struct qla_tgt_sess *qla_tgt_sess,
1232         uint16_t loop_id)
1233 {
1234         struct se_node_acl *saved_nacl;
1235         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1236
1237         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1238
1239         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1240                         lport->lport_loopid_map)[loop_id];
1241
1242         saved_nacl = fc_loopid->se_nacl;
1243         if (!saved_nacl) {
1244                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1245                 fc_loopid->se_nacl = new_se_nacl;
1246                 if (qla_tgt_sess->se_sess != se_sess)
1247                         qla_tgt_sess->se_sess = se_sess;
1248                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1249                         nacl->qla_tgt_sess = qla_tgt_sess;
1250                 return;
1251         }
1252
1253         if (nacl->qla_tgt_sess) {
1254                 if (new_se_nacl == NULL) {
1255                         pr_debug("Clearing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1256                         fc_loopid->se_nacl = NULL;
1257                         nacl->qla_tgt_sess = NULL;
1258                         return;
1259                 }
1260
1261                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1262                 fc_loopid->se_nacl = new_se_nacl;
1263                 if (qla_tgt_sess->se_sess != se_sess)
1264                         qla_tgt_sess->se_sess = se_sess;
1265                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1266                         nacl->qla_tgt_sess = qla_tgt_sess;
1267                 return;
1268         }
1269
1270         if (new_se_nacl == NULL) {
1271                 pr_debug("Clearing fc_loopid->se_nacl\n");
1272                 fc_loopid->se_nacl = NULL;
1273                 return;
1274         }
1275
1276         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->qla_tgt_sess\n");
1277         fc_loopid->se_nacl = new_se_nacl;
1278         if (qla_tgt_sess->se_sess != se_sess)
1279                 qla_tgt_sess->se_sess = se_sess;
1280         if (nacl->qla_tgt_sess != qla_tgt_sess)
1281                 nacl->qla_tgt_sess = qla_tgt_sess;
1282
1283         pr_debug("Setup nacl->qla_tgt_sess %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1284             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1285 }
1286
1287 /*
1288  * Should always be called with qla_hw_data->hardware_lock held.
1289  */
1290 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1291                 struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess)
1292 {
1293         struct se_session *se_sess = sess->se_sess;
1294         unsigned char be_sid[3];
1295
1296         be_sid[0] = sess->s_id.b.domain;
1297         be_sid[1] = sess->s_id.b.area;
1298         be_sid[2] = sess->s_id.b.al_pa;
1299
1300         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1301                                 sess, be_sid);
1302         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1303                                 sess, sess->loop_id);
1304 }
1305
1306 static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
1307 {
1308         struct qla_tgt *tgt = sess->tgt;
1309         struct qla_hw_data *ha = tgt->ha;
1310         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1311         struct se_session *se_sess;
1312         struct tcm_qla2xxx_lport *lport;
1313
1314         BUG_ON(in_interrupt());
1315
1316         se_sess = sess->se_sess;
1317         if (!se_sess) {
1318                 pr_err("struct qla_tgt_sess->se_sess is NULL\n");
1319                 dump_stack();
1320                 return;
1321         }
1322
1323         lport = vha->vha_tgt.target_lport_ptr;
1324         if (!lport) {
1325                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1326                 dump_stack();
1327                 return;
1328         }
1329         target_wait_for_sess_cmds(se_sess);
1330
1331         transport_deregister_session_configfs(sess->se_sess);
1332         transport_deregister_session(sess->se_sess);
1333 }
1334
1335 /*
1336  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1337  * to locate struct se_node_acl
1338  */
1339 static int tcm_qla2xxx_check_initiator_node_acl(
1340         scsi_qla_host_t *vha,
1341         unsigned char *fc_wwpn,
1342         void *qla_tgt_sess,
1343         uint8_t *s_id,
1344         uint16_t loop_id)
1345 {
1346         struct qla_hw_data *ha = vha->hw;
1347         struct tcm_qla2xxx_lport *lport;
1348         struct tcm_qla2xxx_tpg *tpg;
1349         struct tcm_qla2xxx_nacl *nacl;
1350         struct se_portal_group *se_tpg;
1351         struct se_node_acl *se_nacl;
1352         struct se_session *se_sess;
1353         struct qla_tgt_sess *sess = qla_tgt_sess;
1354         unsigned char port_name[36];
1355         unsigned long flags;
1356         int num_tags = (ha->fw_xcb_count) ? ha->fw_xcb_count :
1357                        TCM_QLA2XXX_DEFAULT_TAGS;
1358
1359         lport = vha->vha_tgt.target_lport_ptr;
1360         if (!lport) {
1361                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1362                 dump_stack();
1363                 return -EINVAL;
1364         }
1365         /*
1366          * Locate the TPG=1 reference..
1367          */
1368         tpg = lport->tpg_1;
1369         if (!tpg) {
1370                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1371                 return -EINVAL;
1372         }
1373         se_tpg = &tpg->se_tpg;
1374
1375         se_sess = transport_init_session_tags(num_tags,
1376                                               sizeof(struct qla_tgt_cmd),
1377                                               TARGET_PROT_ALL);
1378         if (IS_ERR(se_sess)) {
1379                 pr_err("Unable to initialize struct se_session\n");
1380                 return PTR_ERR(se_sess);
1381         }
1382         /*
1383          * Format the FCP Initiator port_name into colon seperated values to
1384          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1385          */
1386         memset(&port_name, 0, 36);
1387         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1388         /*
1389          * Locate our struct se_node_acl either from an explict NodeACL created
1390          * via ConfigFS, or via running in TPG demo mode.
1391          */
1392         se_sess->se_node_acl = core_tpg_check_initiator_node_acl(se_tpg,
1393                                         port_name);
1394         if (!se_sess->se_node_acl) {
1395                 transport_free_session(se_sess);
1396                 return -EINVAL;
1397         }
1398         se_nacl = se_sess->se_node_acl;
1399         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1400         /*
1401          * And now setup the new se_nacl and session pointers into our HW lport
1402          * mappings for fabric S_ID and LOOP_ID.
1403          */
1404         spin_lock_irqsave(&ha->hardware_lock, flags);
1405         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess,
1406                         qla_tgt_sess, s_id);
1407         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl, se_sess,
1408                         qla_tgt_sess, loop_id);
1409         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1410         /*
1411          * Finally register the new FC Nexus with TCM
1412          */
1413         transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
1414
1415         return 0;
1416 }
1417
1418 static void tcm_qla2xxx_update_sess(struct qla_tgt_sess *sess, port_id_t s_id,
1419                                     uint16_t loop_id, bool conf_compl_supported)
1420 {
1421         struct qla_tgt *tgt = sess->tgt;
1422         struct qla_hw_data *ha = tgt->ha;
1423         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1424         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1425         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1426         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1427                         struct tcm_qla2xxx_nacl, se_node_acl);
1428         u32 key;
1429
1430
1431         if (sess->loop_id != loop_id || sess->s_id.b24 != s_id.b24)
1432                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1433                     sess, sess->port_name,
1434                     sess->loop_id, loop_id, sess->s_id.b.domain,
1435                     sess->s_id.b.area, sess->s_id.b.al_pa, s_id.b.domain,
1436                     s_id.b.area, s_id.b.al_pa);
1437
1438         if (sess->loop_id != loop_id) {
1439                 /*
1440                  * Because we can shuffle loop IDs around and we
1441                  * update different sessions non-atomically, we might
1442                  * have overwritten this session's old loop ID
1443                  * already, and we might end up overwriting some other
1444                  * session that will be updated later.  So we have to
1445                  * be extra careful and we can't warn about those things...
1446                  */
1447                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1448                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1449
1450                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1451
1452                 sess->loop_id = loop_id;
1453         }
1454
1455         if (sess->s_id.b24 != s_id.b24) {
1456                 key = (((u32) sess->s_id.b.domain << 16) |
1457                        ((u32) sess->s_id.b.area   <<  8) |
1458                        ((u32) sess->s_id.b.al_pa));
1459
1460                 if (btree_lookup32(&lport->lport_fcport_map, key))
1461                         WARN(btree_remove32(&lport->lport_fcport_map, key) != se_nacl,
1462                              "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1463                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1464                 else
1465                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1466                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1467
1468                 key = (((u32) s_id.b.domain << 16) |
1469                        ((u32) s_id.b.area   <<  8) |
1470                        ((u32) s_id.b.al_pa));
1471
1472                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1473                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1474                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1475                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1476                 } else {
1477                         btree_insert32(&lport->lport_fcport_map, key, se_nacl, GFP_ATOMIC);
1478                 }
1479
1480                 sess->s_id = s_id;
1481                 nacl->nport_id = key;
1482         }
1483
1484         sess->conf_compl_supported = conf_compl_supported;
1485
1486         /* Reset logout parameters to default */
1487         sess->logout_on_delete = 1;
1488         sess->keep_nport_handle = 0;
1489 }
1490
1491 /*
1492  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1493  */
1494 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1495         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1496         .handle_data            = tcm_qla2xxx_handle_data,
1497         .handle_dif_err         = tcm_qla2xxx_handle_dif_err,
1498         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1499         .free_cmd               = tcm_qla2xxx_free_cmd,
1500         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1501         .free_session           = tcm_qla2xxx_free_session,
1502         .update_sess            = tcm_qla2xxx_update_sess,
1503         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1504         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1505         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1506         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1507         .put_sess               = tcm_qla2xxx_put_sess,
1508         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1509 };
1510
1511 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1512 {
1513         int rc;
1514
1515         rc = btree_init32(&lport->lport_fcport_map);
1516         if (rc) {
1517                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1518                 return rc;
1519         }
1520
1521         lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1522                                 65536);
1523         if (!lport->lport_loopid_map) {
1524                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1525                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1526                 btree_destroy32(&lport->lport_fcport_map);
1527                 return -ENOMEM;
1528         }
1529         memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1530                * 65536);
1531         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1532                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1533         return 0;
1534 }
1535
1536 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1537                                          void *target_lport_ptr,
1538                                          u64 npiv_wwpn, u64 npiv_wwnn)
1539 {
1540         struct qla_hw_data *ha = vha->hw;
1541         struct tcm_qla2xxx_lport *lport =
1542                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1543         /*
1544          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1545          */
1546         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1547         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1548         lport->qla_vha = vha;
1549
1550         return 0;
1551 }
1552
1553 static struct se_wwn *tcm_qla2xxx_make_lport(
1554         struct target_fabric_configfs *tf,
1555         struct config_group *group,
1556         const char *name)
1557 {
1558         struct tcm_qla2xxx_lport *lport;
1559         u64 wwpn;
1560         int ret = -ENODEV;
1561
1562         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1563                 return ERR_PTR(-EINVAL);
1564
1565         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1566         if (!lport) {
1567                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1568                 return ERR_PTR(-ENOMEM);
1569         }
1570         lport->lport_wwpn = wwpn;
1571         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1572                                 wwpn);
1573         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1574
1575         ret = tcm_qla2xxx_init_lport(lport);
1576         if (ret != 0)
1577                 goto out;
1578
1579         ret = qlt_lport_register(lport, wwpn, 0, 0,
1580                                  tcm_qla2xxx_lport_register_cb);
1581         if (ret != 0)
1582                 goto out_lport;
1583
1584         return &lport->lport_wwn;
1585 out_lport:
1586         vfree(lport->lport_loopid_map);
1587         btree_destroy32(&lport->lport_fcport_map);
1588 out:
1589         kfree(lport);
1590         return ERR_PTR(ret);
1591 }
1592
1593 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1594 {
1595         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1596                         struct tcm_qla2xxx_lport, lport_wwn);
1597         struct scsi_qla_host *vha = lport->qla_vha;
1598         struct se_node_acl *node;
1599         u32 key = 0;
1600
1601         /*
1602          * Call into qla2x_target.c LLD logic to complete the
1603          * shutdown of struct qla_tgt after the call to
1604          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1605          */
1606         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1607                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1608
1609         qlt_lport_deregister(vha);
1610
1611         vfree(lport->lport_loopid_map);
1612         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1613                 btree_remove32(&lport->lport_fcport_map, key);
1614         btree_destroy32(&lport->lport_fcport_map);
1615         kfree(lport);
1616 }
1617
1618 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1619                                               void *target_lport_ptr,
1620                                               u64 npiv_wwpn, u64 npiv_wwnn)
1621 {
1622         struct fc_vport *vport;
1623         struct Scsi_Host *sh = base_vha->host;
1624         struct scsi_qla_host *npiv_vha;
1625         struct tcm_qla2xxx_lport *lport =
1626                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1627         struct tcm_qla2xxx_lport *base_lport =
1628                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1629         struct fc_vport_identifiers vport_id;
1630
1631         if (!qla_tgt_mode_enabled(base_vha)) {
1632                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1633                 return -EPERM;
1634         }
1635
1636         if (!base_lport || !base_lport->tpg_1 ||
1637             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1638                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1639                 return -EPERM;
1640         }
1641
1642         memset(&vport_id, 0, sizeof(vport_id));
1643         vport_id.port_name = npiv_wwpn;
1644         vport_id.node_name = npiv_wwnn;
1645         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1646         vport_id.vport_type = FC_PORTTYPE_NPIV;
1647         vport_id.disable = false;
1648
1649         vport = fc_vport_create(sh, 0, &vport_id);
1650         if (!vport) {
1651                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1652                 return -ENODEV;
1653         }
1654         /*
1655          * Setup local pointer to NPIV vhba + target_lport_ptr
1656          */
1657         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1658         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1659         lport->qla_vha = npiv_vha;
1660         scsi_host_get(npiv_vha->host);
1661         return 0;
1662 }
1663
1664
1665 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1666         struct target_fabric_configfs *tf,
1667         struct config_group *group,
1668         const char *name)
1669 {
1670         struct tcm_qla2xxx_lport *lport;
1671         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1672         char *p, tmp[128];
1673         int ret;
1674
1675         snprintf(tmp, 128, "%s", name);
1676
1677         p = strchr(tmp, '@');
1678         if (!p) {
1679                 pr_err("Unable to locate NPIV '@' seperator\n");
1680                 return ERR_PTR(-EINVAL);
1681         }
1682         *p++ = '\0';
1683
1684         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1685                 return ERR_PTR(-EINVAL);
1686
1687         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1688                                        &npiv_wwpn, &npiv_wwnn) < 0)
1689                 return ERR_PTR(-EINVAL);
1690
1691         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1692         if (!lport) {
1693                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1694                 return ERR_PTR(-ENOMEM);
1695         }
1696         lport->lport_npiv_wwpn = npiv_wwpn;
1697         lport->lport_npiv_wwnn = npiv_wwnn;
1698         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1699
1700         ret = tcm_qla2xxx_init_lport(lport);
1701         if (ret != 0)
1702                 goto out;
1703
1704         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1705                                  tcm_qla2xxx_lport_register_npiv_cb);
1706         if (ret != 0)
1707                 goto out_lport;
1708
1709         return &lport->lport_wwn;
1710 out_lport:
1711         vfree(lport->lport_loopid_map);
1712         btree_destroy32(&lport->lport_fcport_map);
1713 out:
1714         kfree(lport);
1715         return ERR_PTR(ret);
1716 }
1717
1718 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1719 {
1720         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1721                         struct tcm_qla2xxx_lport, lport_wwn);
1722         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1723         struct qla_hw_data *ha = npiv_vha->hw;
1724         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1725
1726         scsi_host_put(npiv_vha->host);
1727         /*
1728          * Notify libfc that we want to release the vha->fc_vport
1729          */
1730         fc_vport_terminate(npiv_vha->fc_vport);
1731         scsi_host_put(base_vha->host);
1732         kfree(lport);
1733 }
1734
1735
1736 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1737                 char *page)
1738 {
1739         return sprintf(page,
1740             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on "
1741             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1742             utsname()->machine);
1743 }
1744
1745 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1746
1747 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1748         &tcm_qla2xxx_wwn_attr_version,
1749         NULL,
1750 };
1751
1752 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1753         .module                         = THIS_MODULE,
1754         .name                           = "qla2xxx",
1755         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1756         /*
1757          * XXX: Limit assumes single page per scatter-gather-list entry.
1758          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1759          */
1760         .max_data_sg_nents              = 1200,
1761         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1762         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1763         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1764         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1765         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1766         .tpg_check_demo_mode_write_protect =
1767                                         tcm_qla2xxx_check_demo_write_protect,
1768         .tpg_check_prod_mode_write_protect =
1769                                         tcm_qla2xxx_check_prod_write_protect,
1770         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1771         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1772         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1773         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1774         .release_cmd                    = tcm_qla2xxx_release_cmd,
1775         .shutdown_session               = tcm_qla2xxx_shutdown_session,
1776         .close_session                  = tcm_qla2xxx_close_session,
1777         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1778         .sess_get_initiator_sid         = NULL,
1779         .write_pending                  = tcm_qla2xxx_write_pending,
1780         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1781         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1782         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1783         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1784         .queue_status                   = tcm_qla2xxx_queue_status,
1785         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1786         .aborted_task                   = tcm_qla2xxx_aborted_task,
1787         /*
1788          * Setup function pointers for generic logic in
1789          * target_core_fabric_configfs.c
1790          */
1791         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1792         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1793         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1794         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1795         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1796
1797         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1798         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1799         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1800 };
1801
1802 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1803         .module                         = THIS_MODULE,
1804         .name                           = "qla2xxx_npiv",
1805         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1806         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
1807         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1808         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1809         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1810         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1811         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1812         .tpg_check_prod_mode_write_protect =
1813             tcm_qla2xxx_check_prod_write_protect,
1814         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1815         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1816         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1817         .release_cmd                    = tcm_qla2xxx_release_cmd,
1818         .shutdown_session               = tcm_qla2xxx_shutdown_session,
1819         .close_session                  = tcm_qla2xxx_close_session,
1820         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1821         .sess_get_initiator_sid         = NULL,
1822         .write_pending                  = tcm_qla2xxx_write_pending,
1823         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1824         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1825         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1826         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1827         .queue_status                   = tcm_qla2xxx_queue_status,
1828         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1829         .aborted_task                   = tcm_qla2xxx_aborted_task,
1830         /*
1831          * Setup function pointers for generic logic in
1832          * target_core_fabric_configfs.c
1833          */
1834         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1835         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1836         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1837         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1838         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1839
1840         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1841         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1842 };
1843
1844 static int tcm_qla2xxx_register_configfs(void)
1845 {
1846         int ret;
1847
1848         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on "
1849             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1850             utsname()->machine);
1851
1852         ret = target_register_template(&tcm_qla2xxx_ops);
1853         if (ret)
1854                 return ret;
1855
1856         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1857         if (ret)
1858                 goto out_fabric;
1859
1860         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1861                                                 WQ_MEM_RECLAIM, 0);
1862         if (!tcm_qla2xxx_free_wq) {
1863                 ret = -ENOMEM;
1864                 goto out_fabric_npiv;
1865         }
1866
1867         tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
1868         if (!tcm_qla2xxx_cmd_wq) {
1869                 ret = -ENOMEM;
1870                 goto out_free_wq;
1871         }
1872
1873         return 0;
1874
1875 out_free_wq:
1876         destroy_workqueue(tcm_qla2xxx_free_wq);
1877 out_fabric_npiv:
1878         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1879 out_fabric:
1880         target_unregister_template(&tcm_qla2xxx_ops);
1881         return ret;
1882 }
1883
1884 static void tcm_qla2xxx_deregister_configfs(void)
1885 {
1886         destroy_workqueue(tcm_qla2xxx_cmd_wq);
1887         destroy_workqueue(tcm_qla2xxx_free_wq);
1888
1889         target_unregister_template(&tcm_qla2xxx_ops);
1890         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1891 }
1892
1893 static int __init tcm_qla2xxx_init(void)
1894 {
1895         int ret;
1896
1897         ret = tcm_qla2xxx_register_configfs();
1898         if (ret < 0)
1899                 return ret;
1900
1901         return 0;
1902 }
1903
1904 static void __exit tcm_qla2xxx_exit(void)
1905 {
1906         tcm_qla2xxx_deregister_configfs();
1907 }
1908
1909 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
1910 MODULE_LICENSE("GPL");
1911 module_init(tcm_qla2xxx_init);
1912 module_exit(tcm_qla2xxx_exit);