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 #include <target/target_core_fabric_configfs.h>
  47 #include <target/configfs_macros.h>
  48
  49 #include "qla_def.h"
  50 #include "qla_target.h"
  51 #include "tcm_qla2xxx.h"
  52
  53 static struct workqueue_struct *tcm_qla2xxx_free_wq;
  54 static struct workqueue_struct *tcm_qla2xxx_cmd_wq;
  55
  56 /*
  57  * Parse WWN.
  58  * If strict, we require lower-case hex and colon separators to be sure
  59  * the name is the same as what would be generated by ft_format_wwn()
  60  * so the name and wwn are mapped one-to-one.
  61  */
  62 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
  63 {
  64         const char *cp;
  65         char c;
  66         u32 nibble;
  67         u32 byte = 0;
  68         u32 pos = 0;
  69         u32 err;
  70
  71         *wwn = 0;
  72         for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
  73                 c = *cp;
  74                 if (c == '\n' && cp[1] == '\0')
  75                         continue;
  76                 if (strict && pos++ == 2 && byte++ < 7) {
  77                         pos = 0;
  78                         if (c == ':')
  79                                 continue;
  80                         err = 1;
  81                         goto fail;
  82                 }
  83                 if (c == '\0') {
  84                         err = 2;
  85                         if (strict && byte != 8)
  86                                 goto fail;
  87                         return cp - name;
  88                 }
  89                 err = 3;
  90                 if (isdigit(c))
  91                         nibble = c - '0';
  92                 else if (isxdigit(c) && (islower(c) || !strict))
  93                         nibble = tolower(c) - 'a' + 10;
  94                 else
  95                         goto fail;
  96                 *wwn = (*wwn << 4) | nibble;
  97         }
  98         err = 4;
  99 fail:
 100         pr_debug("err %u len %zu pos %u byte %u\n",
 101                         err, cp - name, pos, byte);
 102         return -1;
 103 }
 104
 105 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
 106 {
 107         u8 b[8];
 108
 109         put_unaligned_be64(wwn, b);
 110         return snprintf(buf, len,
 111                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 112                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
 113 }
 114
 115 static char *tcm_qla2xxx_get_fabric_name(void)
 116 {
 117         return "qla2xxx";
 118 }
 119
 120 /*
 121  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
 122  */
 123 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
 124 {
 125         unsigned int i, j;
 126         u8 wwn[8];
 127
 128         memset(wwn, 0, sizeof(wwn));
 129
 130         /* Validate and store the new name */
 131         for (i = 0, j = 0; i < 16; i++) {
 132                 int value;
 133
 134                 value = hex_to_bin(*ns++);
 135                 if (value >= 0)
 136                         j = (j << 4) | value;
 137                 else
 138                         return -EINVAL;
 139
 140                 if (i % 2) {
 141                         wwn[i/2] = j & 0xff;
 142                         j = 0;
 143                 }
 144         }
 145
 146         *nm = wwn_to_u64(wwn);
 147         return 0;
 148 }
 149
 150 /*
 151  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 152  * store_fc_host_vport_create()
 153  */
 154 static int tcm_qla2xxx_npiv_parse_wwn(
 155         const char *name,
 156         size_t count,
 157         u64 *wwpn,
 158         u64 *wwnn)
 159 {
 160         unsigned int cnt = count;
 161         int rc;
 162
 163         *wwpn = 0;
 164         *wwnn = 0;
 165
 166         /* count may include a LF at end of string */
 167         if (name[cnt-1] == '\n' || name[cnt-1] == 0)
 168                 cnt--;
 169
 170         /* validate we have enough characters for WWPN */
 171         if ((cnt != (16+1+16)) || (name[16] != ':'))
 172                 return -EINVAL;
 173
 174         rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
 175         if (rc != 0)
 176                 return rc;
 177
 178         rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
 179         if (rc != 0)
 180                 return rc;
 181
 182         return 0;
 183 }
 184
 185 static char *tcm_qla2xxx_npiv_get_fabric_name(void)
 186 {
 187         return "qla2xxx_npiv";
 188 }
 189
 190 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
 191 {
 192         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 193                                 struct tcm_qla2xxx_tpg, se_tpg);
 194         struct tcm_qla2xxx_lport *lport = tpg->lport;
 195
 196         return lport->lport_naa_name;
 197 }
 198
 199 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
 200 {
 201         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 202                                 struct tcm_qla2xxx_tpg, se_tpg);
 203         return tpg->lport_tpgt;
 204 }
 205
 206 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
 207 {
 208         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 209                                 struct tcm_qla2xxx_tpg, se_tpg);
 210
 211         return tpg->tpg_attrib.generate_node_acls;
 212 }
 213
 214 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
 215 {
 216         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 217                                 struct tcm_qla2xxx_tpg, se_tpg);
 218
 219         return tpg->tpg_attrib.cache_dynamic_acls;
 220 }
 221
 222 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
 223 {
 224         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 225                                 struct tcm_qla2xxx_tpg, se_tpg);
 226
 227         return tpg->tpg_attrib.demo_mode_write_protect;
 228 }
 229
 230 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
 231 {
 232         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 233                                 struct tcm_qla2xxx_tpg, se_tpg);
 234
 235         return tpg->tpg_attrib.prod_mode_write_protect;
 236 }
 237
 238 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
 239 {
 240         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 241                                 struct tcm_qla2xxx_tpg, se_tpg);
 242
 243         return tpg->tpg_attrib.demo_mode_login_only;
 244 }
 245
 246 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg)
 247 {
 248         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 249                                 struct tcm_qla2xxx_tpg, se_tpg);
 250
 251         return tpg->tpg_attrib.fabric_prot_type;
 252 }
 253
 254 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
 255 {
 256         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 257                                 struct tcm_qla2xxx_tpg, se_tpg);
 258
 259         return tpg->lport_tpgt;
 260 }
 261
 262 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
 263 {
 264         struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
 265                         struct qla_tgt_mgmt_cmd, free_work);
 266
 267         transport_generic_free_cmd(&mcmd->se_cmd, 0);
 268 }
 269
 270 /*
 271  * Called from qla_target_template->free_mcmd(), and will call
 272  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 273  * release callback.  qla_hw_data->hardware_lock is expected to be held
 274  */
 275 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
 276 {
 277         INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
 278         queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
 279 }
 280
 281 static void tcm_qla2xxx_complete_free(struct work_struct *work)
 282 {
 283         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 284
 285         cmd->cmd_in_wq = 0;
 286
 287         WARN_ON(cmd->cmd_flags &  BIT_16);
 288
 289         cmd->cmd_flags |= BIT_16;
 290         transport_generic_free_cmd(&cmd->se_cmd, 0);
 291 }
 292
 293 /*
 294  * Called from qla_target_template->free_cmd(), and will call
 295  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 296  * release callback.  qla_hw_data->hardware_lock is expected to be held
 297  */
 298 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 299 {
 300         cmd->cmd_in_wq = 1;
 301         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 302         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 303 }
 304
 305 /*
 306  * Called from struct target_core_fabric_ops->check_stop_free() context
 307  */
 308 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 309 {
 310         struct qla_tgt_cmd *cmd;
 311
 312         if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 313                 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 314                 cmd->cmd_flags |= BIT_14;
 315         }
 316
 317         return target_put_sess_cmd(se_cmd);
 318 }
 319
 320 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 321  * fabric descriptor @se_cmd command to release
 322  */
 323 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 324 {
 325         struct qla_tgt_cmd *cmd;
 326
 327         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 328                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 329                                 struct qla_tgt_mgmt_cmd, se_cmd);
 330                 qlt_free_mcmd(mcmd);
 331                 return;
 332         }
 333
 334         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 335         qlt_free_cmd(cmd);
 336 }
 337
 338 static int tcm_qla2xxx_shutdown_session(struct se_session *se_sess)
 339 {
 340         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 341         struct scsi_qla_host *vha;
 342         unsigned long flags;
 343
 344         BUG_ON(!sess);
 345         vha = sess->vha;
 346
 347         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
 348         target_sess_cmd_list_set_waiting(se_sess);
 349         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
 350
 351         return 1;
 352 }
 353
 354 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 355 {
 356         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 357         struct scsi_qla_host *vha;
 358         unsigned long flags;
 359
 360         BUG_ON(!sess);
 361         vha = sess->vha;
 362
 363         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
 364         qlt_unreg_sess(sess);
 365         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
 366 }
 367
 368 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 369 {
 370         return 0;
 371 }
 372
 373 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 374 {
 375         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 376                                 struct qla_tgt_cmd, se_cmd);
 377         cmd->cmd_flags |= BIT_3;
 378         cmd->bufflen = se_cmd->data_length;
 379         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 380
 381         cmd->sg_cnt = se_cmd->t_data_nents;
 382         cmd->sg = se_cmd->t_data_sg;
 383
 384         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 385         cmd->prot_sg = se_cmd->t_prot_sg;
 386         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 387         se_cmd->pi_err = 0;
 388
 389         /*
 390          * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
 391          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 392          */
 393         return qlt_rdy_to_xfer(cmd);
 394 }
 395
 396 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
 397 {
 398         unsigned long flags;
 399         /*
 400          * Check for WRITE_PENDING status to determine if we need to wait for
 401          * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
 402          */
 403         spin_lock_irqsave(&se_cmd->t_state_lock, flags);
 404         if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
 405             se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
 406                 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 407                 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
 408                                             3 * HZ);
 409                 return 0;
 410         }
 411         spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 412
 413         return 0;
 414 }
 415
 416 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 417 {
 418         return;
 419 }
 420
 421 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 422 {
 423         if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
 424                 struct qla_tgt_cmd *cmd = container_of(se_cmd,
 425                                 struct qla_tgt_cmd, se_cmd);
 426                 return cmd->state;
 427         }
 428
 429         return 0;
 430 }
 431
 432 /*
 433  * Called from process context in qla_target.c:qlt_do_work() code
 434  */
 435 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 436         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 437         int data_dir, int bidi)
 438 {
 439         struct se_cmd *se_cmd = &cmd->se_cmd;
 440         struct se_session *se_sess;
 441         struct qla_tgt_sess *sess;
 442         int flags = TARGET_SCF_ACK_KREF;
 443
 444         if (bidi)
 445                 flags |= TARGET_SCF_BIDI_OP;
 446
 447         sess = cmd->sess;
 448         if (!sess) {
 449                 pr_err("Unable to locate struct qla_tgt_sess from qla_tgt_cmd\n");
 450                 return -EINVAL;
 451         }
 452
 453         se_sess = sess->se_sess;
 454         if (!se_sess) {
 455                 pr_err("Unable to locate active struct se_session\n");
 456                 return -EINVAL;
 457         }
 458
 459         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 460                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 461                                 data_dir, flags);
 462 }
 463
 464 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 465 {
 466         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 467
 468         /*
 469          * Ensure that the complete FCP WRITE payload has been received.
 470          * Otherwise return an exception via CHECK_CONDITION status.
 471          */
 472         cmd->cmd_in_wq = 0;
 473         cmd->cmd_flags |= BIT_11;
 474         if (!cmd->write_data_transferred) {
 475                 /*
 476                  * Check if se_cmd has already been aborted via LUN_RESET, and
 477                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
 478                  */
 479                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
 480                         complete(&cmd->se_cmd.t_transport_stop_comp);
 481                         return;
 482                 }
 483
 484                 if (cmd->se_cmd.pi_err)
 485                         transport_generic_request_failure(&cmd->se_cmd,
 486                                 cmd->se_cmd.pi_err);
 487                 else
 488                         transport_generic_request_failure(&cmd->se_cmd,
 489                                 TCM_CHECK_CONDITION_ABORT_CMD);
 490
 491                 return;
 492         }
 493
 494         return target_execute_cmd(&cmd->se_cmd);
 495 }
 496
 497 /*
 498  * Called from qla_target.c:qlt_do_ctio_completion()
 499  */
 500 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 501 {
 502         cmd->cmd_flags |= BIT_10;
 503         cmd->cmd_in_wq = 1;
 504         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 505         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 506 }
 507
 508 static void tcm_qla2xxx_handle_dif_work(struct work_struct *work)
 509 {
 510         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 511
 512         /* take an extra kref to prevent cmd free too early.
 513          * need to wait for SCSI status/check condition to
 514          * finish responding generate by transport_generic_request_failure.
 515          */
 516         kref_get(&cmd->se_cmd.cmd_kref);
 517         transport_generic_request_failure(&cmd->se_cmd, cmd->se_cmd.pi_err);
 518 }
 519
 520 /*
 521  * Called from qla_target.c:qlt_do_ctio_completion()
 522  */
 523 static void tcm_qla2xxx_handle_dif_err(struct qla_tgt_cmd *cmd)
 524 {
 525         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_dif_work);
 526         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 527 }
 528
 529 /*
 530  * Called from qla_target.c:qlt_issue_task_mgmt()
 531  */
 532 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
 533         uint8_t tmr_func, uint32_t tag)
 534 {
 535         struct qla_tgt_sess *sess = mcmd->sess;
 536         struct se_cmd *se_cmd = &mcmd->se_cmd;
 537
 538         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 539                         tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
 540 }
 541
 542 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 543 {
 544         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 545                                 struct qla_tgt_cmd, se_cmd);
 546
 547         cmd->cmd_flags |= BIT_4;
 548         cmd->bufflen = se_cmd->data_length;
 549         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 550
 551         cmd->sg_cnt = se_cmd->t_data_nents;
 552         cmd->sg = se_cmd->t_data_sg;
 553         cmd->offset = 0;
 554
 555         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 556         cmd->prot_sg = se_cmd->t_prot_sg;
 557         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 558         se_cmd->pi_err = 0;
 559
 560         /*
 561          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 562          */
 563         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 564                                 se_cmd->scsi_status);
 565 }
 566
 567 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 568 {
 569         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 570                                 struct qla_tgt_cmd, se_cmd);
 571         int xmit_type = QLA_TGT_XMIT_STATUS;
 572
 573         cmd->bufflen = se_cmd->data_length;
 574         cmd->sg = NULL;
 575         cmd->sg_cnt = 0;
 576         cmd->offset = 0;
 577         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 578         if (cmd->cmd_flags &  BIT_5) {
 579                 pr_crit("Bit_5 already set for cmd = %p.\n", cmd);
 580                 dump_stack();
 581         }
 582         cmd->cmd_flags |= BIT_5;
 583
 584         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 585                 /*
 586                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 587                  * for qla_tgt_xmit_response LLD code
 588                  */
 589                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 590                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 591                         se_cmd->residual_count = 0;
 592                 }
 593                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 594                 se_cmd->residual_count += se_cmd->data_length;
 595
 596                 cmd->bufflen = 0;
 597         }
 598         /*
 599          * Now queue status response to qla2xxx LLD code and response ring
 600          */
 601         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 602 }
 603
 604 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 605 {
 606         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 607         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 608                                 struct qla_tgt_mgmt_cmd, se_cmd);
 609
 610         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 611                         mcmd, se_tmr->function, se_tmr->response);
 612         /*
 613          * Do translation between TCM TM response codes and
 614          * QLA2xxx FC TM response codes.
 615          */
 616         switch (se_tmr->response) {
 617         case TMR_FUNCTION_COMPLETE:
 618                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 619                 break;
 620         case TMR_TASK_DOES_NOT_EXIST:
 621                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 622                 break;
 623         case TMR_FUNCTION_REJECTED:
 624                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 625                 break;
 626         case TMR_LUN_DOES_NOT_EXIST:
 627         default:
 628                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 629                 break;
 630         }
 631         /*
 632          * Queue the TM response to QLA2xxx LLD to build a
 633          * CTIO response packet.
 634          */
 635         qlt_xmit_tm_rsp(mcmd);
 636 }
 637
 638 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 639 {
 640         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 641                                 struct qla_tgt_cmd, se_cmd);
 642         qlt_abort_cmd(cmd);
 643 }
 644
 645 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 646                         struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *);
 647 /*
 648  * Expected to be called with struct qla_hw_data->hardware_lock held
 649  */
 650 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
 651 {
 652         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 653         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 654         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 655         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 656                                 struct tcm_qla2xxx_lport, lport_wwn);
 657         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 658                                 struct tcm_qla2xxx_nacl, se_node_acl);
 659         void *node;
 660
 661         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 662
 663         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 664         if (WARN_ON(node && (node != se_nacl))) {
 665                 /*
 666                  * The nacl no longer matches what we think it should be.
 667                  * Most likely a new dynamic acl has been added while
 668                  * someone dropped the hardware lock.  It clearly is a
 669                  * bug elsewhere, but this bit can't make things worse.
 670                  */
 671                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 672                                node, GFP_ATOMIC);
 673         }
 674
 675         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 676             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 677         /*
 678          * Now clear the se_nacl and session pointers from our HW lport lookup
 679          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 680          *
 681          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 682          * target_wait_for_sess_cmds() before the session waits for outstanding
 683          * I/O to complete, to avoid a race between session shutdown execution
 684          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 685          */
 686         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 687 }
 688
 689 static void tcm_qla2xxx_release_session(struct kref *kref)
 690 {
 691         struct se_session *se_sess = container_of(kref,
 692                         struct se_session, sess_kref);
 693
 694         qlt_unreg_sess(se_sess->fabric_sess_ptr);
 695 }
 696
 697 static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess)
 698 {
 699         if (!sess)
 700                 return;
 701
 702         assert_spin_locked(&sess->vha->hw->hardware_lock);
 703         kref_put(&sess->se_sess->sess_kref, tcm_qla2xxx_release_session);
 704 }
 705
 706 static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess)
 707 {
 708         assert_spin_locked(&sess->vha->hw->hardware_lock);
 709         target_sess_cmd_list_set_waiting(sess->se_sess);
 710 }
 711
 712 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 713                 const char *name)
 714 {
 715         struct tcm_qla2xxx_nacl *nacl =
 716                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 717         u64 wwnn;
 718
 719         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 720                 return -EINVAL;
 721
 722         nacl->nport_wwnn = wwnn;
 723         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 724
 725         return 0;
 726 }
 727
 728 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 729
 730 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 731                                                                         \
 732 static ssize_t tcm_qla2xxx_tpg_attrib_show_##name(                      \
 733         struct se_portal_group *se_tpg,                                 \
 734         char *page)                                                     \
 735 {                                                                       \
 736         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 737                         struct tcm_qla2xxx_tpg, se_tpg);                \
 738                                                                         \
 739         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
 740 }                                                                       \
 741                                                                         \
 742 static ssize_t tcm_qla2xxx_tpg_attrib_store_##name(                     \
 743         struct se_portal_group *se_tpg,                                 \
 744         const char *page,                                               \
 745         size_t count)                                                   \
 746 {                                                                       \
 747         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 748                         struct tcm_qla2xxx_tpg, se_tpg);                \
 749         unsigned long val;                                              \
 750         int ret;                                                        \
 751                                                                         \
 752         ret = kstrtoul(page, 0, &val);                                  \
 753         if (ret < 0) {                                                  \
 754                 pr_err("kstrtoul() failed with"                         \
 755                                 " ret: %d\n", ret);                     \
 756                 return -EINVAL;                                         \
 757         }                                                               \
 758         ret = tcm_qla2xxx_set_attrib_##name(tpg, val);                  \
 759                                                                         \
 760         return (!ret) ? count : -EINVAL;                                \
 761 }
 762
 763 #define DEF_QLA_TPG_ATTR_BOOL(_name)                                    \
 764                                                                         \
 765 static int tcm_qla2xxx_set_attrib_##_name(                              \
 766         struct tcm_qla2xxx_tpg *tpg,                                    \
 767         unsigned long val)                                              \
 768 {                                                                       \
 769         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 770                                                                         \
 771         if ((val != 0) && (val != 1)) {                                 \
 772                 pr_err("Illegal boolean value %lu\n", val);             \
 773                 return -EINVAL;                                         \
 774         }                                                               \
 775                                                                         \
 776         a->_name = val;                                                 \
 777         return 0;                                                       \
 778 }
 779
 780 #define QLA_TPG_ATTR(_name, _mode) \
 781         TF_TPG_ATTRIB_ATTR(tcm_qla2xxx, _name, _mode);
 782
 783 /*
 784  * Define tcm_qla2xxx_tpg_attrib_s_generate_node_acls
 785  */
 786 DEF_QLA_TPG_ATTR_BOOL(generate_node_acls);
 787 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 788 QLA_TPG_ATTR(generate_node_acls, S_IRUGO | S_IWUSR);
 789
 790 /*
 791  Define tcm_qla2xxx_attrib_s_cache_dynamic_acls
 792  */
 793 DEF_QLA_TPG_ATTR_BOOL(cache_dynamic_acls);
 794 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 795 QLA_TPG_ATTR(cache_dynamic_acls, S_IRUGO | S_IWUSR);
 796
 797 /*
 798  * Define tcm_qla2xxx_tpg_attrib_s_demo_mode_write_protect
 799  */
 800 DEF_QLA_TPG_ATTR_BOOL(demo_mode_write_protect);
 801 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 802 QLA_TPG_ATTR(demo_mode_write_protect, S_IRUGO | S_IWUSR);
 803
 804 /*
 805  * Define tcm_qla2xxx_tpg_attrib_s_prod_mode_write_protect
 806  */
 807 DEF_QLA_TPG_ATTR_BOOL(prod_mode_write_protect);
 808 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 809 QLA_TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);
 810
 811 /*
 812  * Define tcm_qla2xxx_tpg_attrib_s_demo_mode_login_only
 813  */
 814 DEF_QLA_TPG_ATTR_BOOL(demo_mode_login_only);
 815 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 816 QLA_TPG_ATTR(demo_mode_login_only, S_IRUGO | S_IWUSR);
 817
 818 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 819         &tcm_qla2xxx_tpg_attrib_generate_node_acls.attr,
 820         &tcm_qla2xxx_tpg_attrib_cache_dynamic_acls.attr,
 821         &tcm_qla2xxx_tpg_attrib_demo_mode_write_protect.attr,
 822         &tcm_qla2xxx_tpg_attrib_prod_mode_write_protect.attr,
 823         &tcm_qla2xxx_tpg_attrib_demo_mode_login_only.attr,
 824         NULL,
 825 };
 826
 827 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 828
 829 static ssize_t tcm_qla2xxx_tpg_show_enable(
 830         struct se_portal_group *se_tpg,
 831         char *page)
 832 {
 833         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 834                         struct tcm_qla2xxx_tpg, se_tpg);
 835
 836         return snprintf(page, PAGE_SIZE, "%d\n",
 837                         atomic_read(&tpg->lport_tpg_enabled));
 838 }
 839
 840 static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
 841 {
 842         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 843                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 844         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 845         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 846
 847         if (!target_depend_item(&se_tpg->tpg_group.cg_item)) {
 848                 atomic_set(&base_tpg->lport_tpg_enabled, 1);
 849                 qlt_enable_vha(base_vha);
 850         }
 851         complete(&base_tpg->tpg_base_comp);
 852 }
 853
 854 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
 855 {
 856         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 857                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 858         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 859         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 860
 861         if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
 862                 atomic_set(&base_tpg->lport_tpg_enabled, 0);
 863                 target_undepend_item(&se_tpg->tpg_group.cg_item);
 864         }
 865         complete(&base_tpg->tpg_base_comp);
 866 }
 867
 868 static ssize_t tcm_qla2xxx_tpg_store_enable(
 869         struct se_portal_group *se_tpg,
 870         const char *page,
 871         size_t count)
 872 {
 873         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 874                         struct tcm_qla2xxx_tpg, se_tpg);
 875         unsigned long op;
 876         int rc;
 877
 878         rc = kstrtoul(page, 0, &op);
 879         if (rc < 0) {
 880                 pr_err("kstrtoul() returned %d\n", rc);
 881                 return -EINVAL;
 882         }
 883         if ((op != 1) && (op != 0)) {
 884                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 885                 return -EINVAL;
 886         }
 887         if (op) {
 888                 if (atomic_read(&tpg->lport_tpg_enabled))
 889                         return -EEXIST;
 890
 891                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
 892         } else {
 893                 if (!atomic_read(&tpg->lport_tpg_enabled))
 894                         return count;
 895
 896                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
 897         }
 898         init_completion(&tpg->tpg_base_comp);
 899         schedule_work(&tpg->tpg_base_work);
 900         wait_for_completion(&tpg->tpg_base_comp);
 901
 902         if (op) {
 903                 if (!atomic_read(&tpg->lport_tpg_enabled))
 904                         return -ENODEV;
 905         } else {
 906                 if (atomic_read(&tpg->lport_tpg_enabled))
 907                         return -EPERM;
 908         }
 909         return count;
 910 }
 911
 912 TF_TPG_BASE_ATTR(tcm_qla2xxx, enable, S_IRUGO | S_IWUSR);
 913
 914 static ssize_t tcm_qla2xxx_tpg_show_dynamic_sessions(
 915         struct se_portal_group *se_tpg,
 916         char *page)
 917 {
 918         return target_show_dynamic_sessions(se_tpg, page);
 919 }
 920
 921 TF_TPG_BASE_ATTR_RO(tcm_qla2xxx, dynamic_sessions);
 922
 923 static ssize_t tcm_qla2xxx_tpg_store_fabric_prot_type(
 924         struct se_portal_group *se_tpg,
 925         const char *page,
 926         size_t count)
 927 {
 928         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 929                                 struct tcm_qla2xxx_tpg, se_tpg);
 930         unsigned long val;
 931         int ret = kstrtoul(page, 0, &val);
 932
 933         if (ret) {
 934                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
 935                 return ret;
 936         }
 937         if (val != 0 && val != 1 && val != 3) {
 938                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
 939                 return -EINVAL;
 940         }
 941         tpg->tpg_attrib.fabric_prot_type = val;
 942
 943         return count;
 944 }
 945
 946 static ssize_t tcm_qla2xxx_tpg_show_fabric_prot_type(
 947         struct se_portal_group *se_tpg,
 948         char *page)
 949 {
 950         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 951                                 struct tcm_qla2xxx_tpg, se_tpg);
 952
 953         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
 954 }
 955 TF_TPG_BASE_ATTR(tcm_qla2xxx, fabric_prot_type, S_IRUGO | S_IWUSR);
 956
 957 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
 958         &tcm_qla2xxx_tpg_enable.attr,
 959         &tcm_qla2xxx_tpg_dynamic_sessions.attr,
 960         &tcm_qla2xxx_tpg_fabric_prot_type.attr,
 961         NULL,
 962 };
 963
 964 static struct se_portal_group *tcm_qla2xxx_make_tpg(
 965         struct se_wwn *wwn,
 966         struct config_group *group,
 967         const char *name)
 968 {
 969         struct tcm_qla2xxx_lport *lport = container_of(wwn,
 970                         struct tcm_qla2xxx_lport, lport_wwn);
 971         struct tcm_qla2xxx_tpg *tpg;
 972         unsigned long tpgt;
 973         int ret;
 974
 975         if (strstr(name, "tpgt_") != name)
 976                 return ERR_PTR(-EINVAL);
 977         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
 978                 return ERR_PTR(-EINVAL);
 979
 980         if ((tpgt != 1)) {
 981                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
 982                 return ERR_PTR(-ENOSYS);
 983         }
 984
 985         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
 986         if (!tpg) {
 987                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
 988                 return ERR_PTR(-ENOMEM);
 989         }
 990         tpg->lport = lport;
 991         tpg->lport_tpgt = tpgt;
 992         /*
 993          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
 994          * NodeACLs
 995          */
 996         tpg->tpg_attrib.generate_node_acls = 1;
 997         tpg->tpg_attrib.demo_mode_write_protect = 1;
 998         tpg->tpg_attrib.cache_dynamic_acls = 1;
 999         tpg->tpg_attrib.demo_mode_login_only = 1;
1000
1001         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1002         if (ret < 0) {
1003                 kfree(tpg);
1004                 return NULL;
1005         }
1006
1007         lport->tpg_1 = tpg;
1008
1009         return &tpg->se_tpg;
1010 }
1011
1012 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1013 {
1014         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1015                         struct tcm_qla2xxx_tpg, se_tpg);
1016         struct tcm_qla2xxx_lport *lport = tpg->lport;
1017         struct scsi_qla_host *vha = lport->qla_vha;
1018         /*
1019          * Call into qla2x_target.c LLD logic to shutdown the active
1020          * FC Nexuses and disable target mode operation for this qla_hw_data
1021          */
1022         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1023                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1024
1025         core_tpg_deregister(se_tpg);
1026         /*
1027          * Clear local TPG=1 pointer for non NPIV mode.
1028          */
1029         lport->tpg_1 = NULL;
1030         kfree(tpg);
1031 }
1032
1033 static ssize_t tcm_qla2xxx_npiv_tpg_show_enable(
1034         struct se_portal_group *se_tpg,
1035         char *page)
1036 {
1037         return tcm_qla2xxx_tpg_show_enable(se_tpg, page);
1038 }
1039
1040 static ssize_t tcm_qla2xxx_npiv_tpg_store_enable(
1041         struct se_portal_group *se_tpg,
1042         const char *page,
1043         size_t count)
1044 {
1045         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1046         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1047                         struct tcm_qla2xxx_lport, lport_wwn);
1048         struct scsi_qla_host *vha = lport->qla_vha;
1049         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1050                         struct tcm_qla2xxx_tpg, se_tpg);
1051         unsigned long op;
1052         int rc;
1053
1054         rc = kstrtoul(page, 0, &op);
1055         if (rc < 0) {
1056                 pr_err("kstrtoul() returned %d\n", rc);
1057                 return -EINVAL;
1058         }
1059         if ((op != 1) && (op != 0)) {
1060                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1061                 return -EINVAL;
1062         }
1063         if (op) {
1064                 if (atomic_read(&tpg->lport_tpg_enabled))
1065                         return -EEXIST;
1066
1067                 atomic_set(&tpg->lport_tpg_enabled, 1);
1068                 qlt_enable_vha(vha);
1069         } else {
1070                 if (!atomic_read(&tpg->lport_tpg_enabled))
1071                         return count;
1072
1073                 atomic_set(&tpg->lport_tpg_enabled, 0);
1074                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1075         }
1076
1077         return count;
1078 }
1079
1080 TF_TPG_BASE_ATTR(tcm_qla2xxx_npiv, enable, S_IRUGO | S_IWUSR);
1081
1082 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1083         &tcm_qla2xxx_npiv_tpg_enable.attr,
1084         NULL,
1085 };
1086
1087 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1088         struct se_wwn *wwn,
1089         struct config_group *group,
1090         const char *name)
1091 {
1092         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1093                         struct tcm_qla2xxx_lport, lport_wwn);
1094         struct tcm_qla2xxx_tpg *tpg;
1095         unsigned long tpgt;
1096         int ret;
1097
1098         if (strstr(name, "tpgt_") != name)
1099                 return ERR_PTR(-EINVAL);
1100         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1101                 return ERR_PTR(-EINVAL);
1102
1103         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1104         if (!tpg) {
1105                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1106                 return ERR_PTR(-ENOMEM);
1107         }
1108         tpg->lport = lport;
1109         tpg->lport_tpgt = tpgt;
1110
1111         /*
1112          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1113          * NodeACLs
1114          */
1115         tpg->tpg_attrib.generate_node_acls = 1;
1116         tpg->tpg_attrib.demo_mode_write_protect = 1;
1117         tpg->tpg_attrib.cache_dynamic_acls = 1;
1118         tpg->tpg_attrib.demo_mode_login_only = 1;
1119
1120         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1121         if (ret < 0) {
1122                 kfree(tpg);
1123                 return NULL;
1124         }
1125         lport->tpg_1 = tpg;
1126         return &tpg->se_tpg;
1127 }
1128
1129 /*
1130  * Expected to be called with struct qla_hw_data->hardware_lock held
1131  */
1132 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_s_id(
1133         scsi_qla_host_t *vha,
1134         const uint8_t *s_id)
1135 {
1136         struct tcm_qla2xxx_lport *lport;
1137         struct se_node_acl *se_nacl;
1138         struct tcm_qla2xxx_nacl *nacl;
1139         u32 key;
1140
1141         lport = vha->vha_tgt.target_lport_ptr;
1142         if (!lport) {
1143                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1144                 dump_stack();
1145                 return NULL;
1146         }
1147
1148         key = sid_to_key(s_id);
1149         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1150
1151         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1152         if (!se_nacl) {
1153                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1154                 return NULL;
1155         }
1156         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1157             se_nacl, se_nacl->initiatorname);
1158
1159         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1160         if (!nacl->qla_tgt_sess) {
1161                 pr_err("Unable to locate struct qla_tgt_sess\n");
1162                 return NULL;
1163         }
1164
1165         return nacl->qla_tgt_sess;
1166 }
1167
1168 /*
1169  * Expected to be called with struct qla_hw_data->hardware_lock held
1170  */
1171 static void tcm_qla2xxx_set_sess_by_s_id(
1172         struct tcm_qla2xxx_lport *lport,
1173         struct se_node_acl *new_se_nacl,
1174         struct tcm_qla2xxx_nacl *nacl,
1175         struct se_session *se_sess,
1176         struct qla_tgt_sess *qla_tgt_sess,
1177         uint8_t *s_id)
1178 {
1179         u32 key;
1180         void *slot;
1181         int rc;
1182
1183         key = sid_to_key(s_id);
1184         pr_debug("set_sess_by_s_id: %06x\n", key);
1185
1186         slot = btree_lookup32(&lport->lport_fcport_map, key);
1187         if (!slot) {
1188                 if (new_se_nacl) {
1189                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1190                         nacl->nport_id = key;
1191                         rc = btree_insert32(&lport->lport_fcport_map, key,
1192                                         new_se_nacl, GFP_ATOMIC);
1193                         if (rc)
1194                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1195                                     (int)key);
1196                 } else {
1197                         pr_debug("Wiping nonexisting fc_port entry\n");
1198                 }
1199
1200                 qla_tgt_sess->se_sess = se_sess;
1201                 nacl->qla_tgt_sess = qla_tgt_sess;
1202                 return;
1203         }
1204
1205         if (nacl->qla_tgt_sess) {
1206                 if (new_se_nacl == NULL) {
1207                         pr_debug("Clearing existing nacl->qla_tgt_sess and fc_port entry\n");
1208                         btree_remove32(&lport->lport_fcport_map, key);
1209                         nacl->qla_tgt_sess = NULL;
1210                         return;
1211                 }
1212                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_port entry\n");
1213                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1214                 qla_tgt_sess->se_sess = se_sess;
1215                 nacl->qla_tgt_sess = qla_tgt_sess;
1216                 return;
1217         }
1218
1219         if (new_se_nacl == NULL) {
1220                 pr_debug("Clearing existing fc_port entry\n");
1221                 btree_remove32(&lport->lport_fcport_map, key);
1222                 return;
1223         }
1224
1225         pr_debug("Replacing existing fc_port entry w/o active nacl->qla_tgt_sess\n");
1226         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1227         qla_tgt_sess->se_sess = se_sess;
1228         nacl->qla_tgt_sess = qla_tgt_sess;
1229
1230         pr_debug("Setup nacl->qla_tgt_sess %p by s_id for se_nacl: %p, initiatorname: %s\n",
1231             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1232 }
1233
1234 /*
1235  * Expected to be called with struct qla_hw_data->hardware_lock held
1236  */
1237 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_loop_id(
1238         scsi_qla_host_t *vha,
1239         const uint16_t loop_id)
1240 {
1241         struct tcm_qla2xxx_lport *lport;
1242         struct se_node_acl *se_nacl;
1243         struct tcm_qla2xxx_nacl *nacl;
1244         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1245
1246         lport = vha->vha_tgt.target_lport_ptr;
1247         if (!lport) {
1248                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1249                 dump_stack();
1250                 return NULL;
1251         }
1252
1253         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1254
1255         fc_loopid = lport->lport_loopid_map + loop_id;
1256         se_nacl = fc_loopid->se_nacl;
1257         if (!se_nacl) {
1258                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1259                     loop_id);
1260                 return NULL;
1261         }
1262
1263         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1264
1265         if (!nacl->qla_tgt_sess) {
1266                 pr_err("Unable to locate struct qla_tgt_sess\n");
1267                 return NULL;
1268         }
1269
1270         return nacl->qla_tgt_sess;
1271 }
1272
1273 /*
1274  * Expected to be called with struct qla_hw_data->hardware_lock held
1275  */
1276 static void tcm_qla2xxx_set_sess_by_loop_id(
1277         struct tcm_qla2xxx_lport *lport,
1278         struct se_node_acl *new_se_nacl,
1279         struct tcm_qla2xxx_nacl *nacl,
1280         struct se_session *se_sess,
1281         struct qla_tgt_sess *qla_tgt_sess,
1282         uint16_t loop_id)
1283 {
1284         struct se_node_acl *saved_nacl;
1285         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1286
1287         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1288
1289         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1290                         lport->lport_loopid_map)[loop_id];
1291
1292         saved_nacl = fc_loopid->se_nacl;
1293         if (!saved_nacl) {
1294                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1295                 fc_loopid->se_nacl = new_se_nacl;
1296                 if (qla_tgt_sess->se_sess != se_sess)
1297                         qla_tgt_sess->se_sess = se_sess;
1298                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1299                         nacl->qla_tgt_sess = qla_tgt_sess;
1300                 return;
1301         }
1302
1303         if (nacl->qla_tgt_sess) {
1304                 if (new_se_nacl == NULL) {
1305                         pr_debug("Clearing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1306                         fc_loopid->se_nacl = NULL;
1307                         nacl->qla_tgt_sess = NULL;
1308                         return;
1309                 }
1310
1311                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1312                 fc_loopid->se_nacl = new_se_nacl;
1313                 if (qla_tgt_sess->se_sess != se_sess)
1314                         qla_tgt_sess->se_sess = se_sess;
1315                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1316                         nacl->qla_tgt_sess = qla_tgt_sess;
1317                 return;
1318         }
1319
1320         if (new_se_nacl == NULL) {
1321                 pr_debug("Clearing fc_loopid->se_nacl\n");
1322                 fc_loopid->se_nacl = NULL;
1323                 return;
1324         }
1325
1326         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->qla_tgt_sess\n");
1327         fc_loopid->se_nacl = new_se_nacl;
1328         if (qla_tgt_sess->se_sess != se_sess)
1329                 qla_tgt_sess->se_sess = se_sess;
1330         if (nacl->qla_tgt_sess != qla_tgt_sess)
1331                 nacl->qla_tgt_sess = qla_tgt_sess;
1332
1333         pr_debug("Setup nacl->qla_tgt_sess %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1334             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1335 }
1336
1337 /*
1338  * Should always be called with qla_hw_data->hardware_lock held.
1339  */
1340 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1341                 struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess)
1342 {
1343         struct se_session *se_sess = sess->se_sess;
1344         unsigned char be_sid[3];
1345
1346         be_sid[0] = sess->s_id.b.domain;
1347         be_sid[1] = sess->s_id.b.area;
1348         be_sid[2] = sess->s_id.b.al_pa;
1349
1350         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1351                                 sess, be_sid);
1352         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1353                                 sess, sess->loop_id);
1354 }
1355
1356 static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
1357 {
1358         struct qla_tgt *tgt = sess->tgt;
1359         struct qla_hw_data *ha = tgt->ha;
1360         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1361         struct se_session *se_sess;
1362         struct se_node_acl *se_nacl;
1363         struct tcm_qla2xxx_lport *lport;
1364         struct tcm_qla2xxx_nacl *nacl;
1365
1366         BUG_ON(in_interrupt());
1367
1368         se_sess = sess->se_sess;
1369         if (!se_sess) {
1370                 pr_err("struct qla_tgt_sess->se_sess is NULL\n");
1371                 dump_stack();
1372                 return;
1373         }
1374         se_nacl = se_sess->se_node_acl;
1375         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1376
1377         lport = vha->vha_tgt.target_lport_ptr;
1378         if (!lport) {
1379                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1380                 dump_stack();
1381                 return;
1382         }
1383         target_wait_for_sess_cmds(se_sess);
1384
1385         transport_deregister_session_configfs(sess->se_sess);
1386         transport_deregister_session(sess->se_sess);
1387 }
1388
1389 /*
1390  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1391  * to locate struct se_node_acl
1392  */
1393 static int tcm_qla2xxx_check_initiator_node_acl(
1394         scsi_qla_host_t *vha,
1395         unsigned char *fc_wwpn,
1396         void *qla_tgt_sess,
1397         uint8_t *s_id,
1398         uint16_t loop_id)
1399 {
1400         struct qla_hw_data *ha = vha->hw;
1401         struct tcm_qla2xxx_lport *lport;
1402         struct tcm_qla2xxx_tpg *tpg;
1403         struct tcm_qla2xxx_nacl *nacl;
1404         struct se_portal_group *se_tpg;
1405         struct se_node_acl *se_nacl;
1406         struct se_session *se_sess;
1407         struct qla_tgt_sess *sess = qla_tgt_sess;
1408         unsigned char port_name[36];
1409         unsigned long flags;
1410         int num_tags = (ha->fw_xcb_count) ? ha->fw_xcb_count :
1411                        TCM_QLA2XXX_DEFAULT_TAGS;
1412
1413         lport = vha->vha_tgt.target_lport_ptr;
1414         if (!lport) {
1415                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1416                 dump_stack();
1417                 return -EINVAL;
1418         }
1419         /*
1420          * Locate the TPG=1 reference..
1421          */
1422         tpg = lport->tpg_1;
1423         if (!tpg) {
1424                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1425                 return -EINVAL;
1426         }
1427         se_tpg = &tpg->se_tpg;
1428
1429         se_sess = transport_init_session_tags(num_tags,
1430                                               sizeof(struct qla_tgt_cmd),
1431                                               TARGET_PROT_ALL);
1432         if (IS_ERR(se_sess)) {
1433                 pr_err("Unable to initialize struct se_session\n");
1434                 return PTR_ERR(se_sess);
1435         }
1436         /*
1437          * Format the FCP Initiator port_name into colon seperated values to
1438          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1439          */
1440         memset(&port_name, 0, 36);
1441         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1442         /*
1443          * Locate our struct se_node_acl either from an explict NodeACL created
1444          * via ConfigFS, or via running in TPG demo mode.
1445          */
1446         se_sess->se_node_acl = core_tpg_check_initiator_node_acl(se_tpg,
1447                                         port_name);
1448         if (!se_sess->se_node_acl) {
1449                 transport_free_session(se_sess);
1450                 return -EINVAL;
1451         }
1452         se_nacl = se_sess->se_node_acl;
1453         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1454         /*
1455          * And now setup the new se_nacl and session pointers into our HW lport
1456          * mappings for fabric S_ID and LOOP_ID.
1457          */
1458         spin_lock_irqsave(&ha->hardware_lock, flags);
1459         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess,
1460                         qla_tgt_sess, s_id);
1461         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl, se_sess,
1462                         qla_tgt_sess, loop_id);
1463         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1464         /*
1465          * Finally register the new FC Nexus with TCM
1466          */
1467         transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
1468
1469         return 0;
1470 }
1471
1472 static void tcm_qla2xxx_update_sess(struct qla_tgt_sess *sess, port_id_t s_id,
1473                                     uint16_t loop_id, bool conf_compl_supported)
1474 {
1475         struct qla_tgt *tgt = sess->tgt;
1476         struct qla_hw_data *ha = tgt->ha;
1477         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1478         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1479         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1480         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1481                         struct tcm_qla2xxx_nacl, se_node_acl);
1482         u32 key;
1483
1484
1485         if (sess->loop_id != loop_id || sess->s_id.b24 != s_id.b24)
1486                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1487                     sess, sess->port_name,
1488                     sess->loop_id, loop_id, sess->s_id.b.domain,
1489                     sess->s_id.b.area, sess->s_id.b.al_pa, s_id.b.domain,
1490                     s_id.b.area, s_id.b.al_pa);
1491
1492         if (sess->loop_id != loop_id) {
1493                 /*
1494                  * Because we can shuffle loop IDs around and we
1495                  * update different sessions non-atomically, we might
1496                  * have overwritten this session's old loop ID
1497                  * already, and we might end up overwriting some other
1498                  * session that will be updated later.  So we have to
1499                  * be extra careful and we can't warn about those things...
1500                  */
1501                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1502                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1503
1504                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1505
1506                 sess->loop_id = loop_id;
1507         }
1508
1509         if (sess->s_id.b24 != s_id.b24) {
1510                 key = (((u32) sess->s_id.b.domain << 16) |
1511                        ((u32) sess->s_id.b.area   <<  8) |
1512                        ((u32) sess->s_id.b.al_pa));
1513
1514                 if (btree_lookup32(&lport->lport_fcport_map, key))
1515                         WARN(btree_remove32(&lport->lport_fcport_map, key) != se_nacl,
1516                              "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1517                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1518                 else
1519                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1520                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1521
1522                 key = (((u32) s_id.b.domain << 16) |
1523                        ((u32) s_id.b.area   <<  8) |
1524                        ((u32) s_id.b.al_pa));
1525
1526                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1527                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1528                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1529                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1530                 } else {
1531                         btree_insert32(&lport->lport_fcport_map, key, se_nacl, GFP_ATOMIC);
1532                 }
1533
1534                 sess->s_id = s_id;
1535                 nacl->nport_id = key;
1536         }
1537
1538         sess->conf_compl_supported = conf_compl_supported;
1539
1540         /* Reset logout parameters to default */
1541         sess->logout_on_delete = 1;
1542         sess->keep_nport_handle = 0;
1543 }
1544
1545 /*
1546  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1547  */
1548 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1549         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1550         .handle_data            = tcm_qla2xxx_handle_data,
1551         .handle_dif_err         = tcm_qla2xxx_handle_dif_err,
1552         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1553         .free_cmd               = tcm_qla2xxx_free_cmd,
1554         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1555         .free_session           = tcm_qla2xxx_free_session,
1556         .update_sess            = tcm_qla2xxx_update_sess,
1557         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1558         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1559         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1560         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1561         .put_sess               = tcm_qla2xxx_put_sess,
1562         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1563 };
1564
1565 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1566 {
1567         int rc;
1568
1569         rc = btree_init32(&lport->lport_fcport_map);
1570         if (rc) {
1571                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1572                 return rc;
1573         }
1574
1575         lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1576                                 65536);
1577         if (!lport->lport_loopid_map) {
1578                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1579                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1580                 btree_destroy32(&lport->lport_fcport_map);
1581                 return -ENOMEM;
1582         }
1583         memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1584                * 65536);
1585         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1586                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1587         return 0;
1588 }
1589
1590 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1591                                          void *target_lport_ptr,
1592                                          u64 npiv_wwpn, u64 npiv_wwnn)
1593 {
1594         struct qla_hw_data *ha = vha->hw;
1595         struct tcm_qla2xxx_lport *lport =
1596                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1597         /*
1598          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1599          */
1600         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1601         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1602         lport->qla_vha = vha;
1603
1604         return 0;
1605 }
1606
1607 static struct se_wwn *tcm_qla2xxx_make_lport(
1608         struct target_fabric_configfs *tf,
1609         struct config_group *group,
1610         const char *name)
1611 {
1612         struct tcm_qla2xxx_lport *lport;
1613         u64 wwpn;
1614         int ret = -ENODEV;
1615
1616         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1617                 return ERR_PTR(-EINVAL);
1618
1619         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1620         if (!lport) {
1621                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1622                 return ERR_PTR(-ENOMEM);
1623         }
1624         lport->lport_wwpn = wwpn;
1625         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1626                                 wwpn);
1627         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1628
1629         ret = tcm_qla2xxx_init_lport(lport);
1630         if (ret != 0)
1631                 goto out;
1632
1633         ret = qlt_lport_register(lport, wwpn, 0, 0,
1634                                  tcm_qla2xxx_lport_register_cb);
1635         if (ret != 0)
1636                 goto out_lport;
1637
1638         return &lport->lport_wwn;
1639 out_lport:
1640         vfree(lport->lport_loopid_map);
1641         btree_destroy32(&lport->lport_fcport_map);
1642 out:
1643         kfree(lport);
1644         return ERR_PTR(ret);
1645 }
1646
1647 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1648 {
1649         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1650                         struct tcm_qla2xxx_lport, lport_wwn);
1651         struct scsi_qla_host *vha = lport->qla_vha;
1652         struct se_node_acl *node;
1653         u32 key = 0;
1654
1655         /*
1656          * Call into qla2x_target.c LLD logic to complete the
1657          * shutdown of struct qla_tgt after the call to
1658          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1659          */
1660         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1661                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1662
1663         qlt_lport_deregister(vha);
1664
1665         vfree(lport->lport_loopid_map);
1666         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1667                 btree_remove32(&lport->lport_fcport_map, key);
1668         btree_destroy32(&lport->lport_fcport_map);
1669         kfree(lport);
1670 }
1671
1672 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1673                                               void *target_lport_ptr,
1674                                               u64 npiv_wwpn, u64 npiv_wwnn)
1675 {
1676         struct fc_vport *vport;
1677         struct Scsi_Host *sh = base_vha->host;
1678         struct scsi_qla_host *npiv_vha;
1679         struct tcm_qla2xxx_lport *lport =
1680                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1681         struct tcm_qla2xxx_lport *base_lport =
1682                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1683         struct tcm_qla2xxx_tpg *base_tpg;
1684         struct fc_vport_identifiers vport_id;
1685
1686         if (!qla_tgt_mode_enabled(base_vha)) {
1687                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1688                 return -EPERM;
1689         }
1690
1691         if (!base_lport || !base_lport->tpg_1 ||
1692             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1693                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1694                 return -EPERM;
1695         }
1696         base_tpg = base_lport->tpg_1;
1697
1698         memset(&vport_id, 0, sizeof(vport_id));
1699         vport_id.port_name = npiv_wwpn;
1700         vport_id.node_name = npiv_wwnn;
1701         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1702         vport_id.vport_type = FC_PORTTYPE_NPIV;
1703         vport_id.disable = false;
1704
1705         vport = fc_vport_create(sh, 0, &vport_id);
1706         if (!vport) {
1707                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1708                 return -ENODEV;
1709         }
1710         /*
1711          * Setup local pointer to NPIV vhba + target_lport_ptr
1712          */
1713         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1714         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1715         lport->qla_vha = npiv_vha;
1716         scsi_host_get(npiv_vha->host);
1717         return 0;
1718 }
1719
1720
1721 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1722         struct target_fabric_configfs *tf,
1723         struct config_group *group,
1724         const char *name)
1725 {
1726         struct tcm_qla2xxx_lport *lport;
1727         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1728         char *p, tmp[128];
1729         int ret;
1730
1731         snprintf(tmp, 128, "%s", name);
1732
1733         p = strchr(tmp, '@');
1734         if (!p) {
1735                 pr_err("Unable to locate NPIV '@' seperator\n");
1736                 return ERR_PTR(-EINVAL);
1737         }
1738         *p++ = '\0';
1739
1740         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1741                 return ERR_PTR(-EINVAL);
1742
1743         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1744                                        &npiv_wwpn, &npiv_wwnn) < 0)
1745                 return ERR_PTR(-EINVAL);
1746
1747         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1748         if (!lport) {
1749                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1750                 return ERR_PTR(-ENOMEM);
1751         }
1752         lport->lport_npiv_wwpn = npiv_wwpn;
1753         lport->lport_npiv_wwnn = npiv_wwnn;
1754         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1755
1756         ret = tcm_qla2xxx_init_lport(lport);
1757         if (ret != 0)
1758                 goto out;
1759
1760         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1761                                  tcm_qla2xxx_lport_register_npiv_cb);
1762         if (ret != 0)
1763                 goto out_lport;
1764
1765         return &lport->lport_wwn;
1766 out_lport:
1767         vfree(lport->lport_loopid_map);
1768         btree_destroy32(&lport->lport_fcport_map);
1769 out:
1770         kfree(lport);
1771         return ERR_PTR(ret);
1772 }
1773
1774 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1775 {
1776         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1777                         struct tcm_qla2xxx_lport, lport_wwn);
1778         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1779         struct qla_hw_data *ha = npiv_vha->hw;
1780         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1781
1782         scsi_host_put(npiv_vha->host);
1783         /*
1784          * Notify libfc that we want to release the vha->fc_vport
1785          */
1786         fc_vport_terminate(npiv_vha->fc_vport);
1787         scsi_host_put(base_vha->host);
1788         kfree(lport);
1789 }
1790
1791
1792 static ssize_t tcm_qla2xxx_wwn_show_attr_version(
1793         struct target_fabric_configfs *tf,
1794         char *page)
1795 {
1796         return sprintf(page,
1797             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on "
1798             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1799             utsname()->machine);
1800 }
1801
1802 TF_WWN_ATTR_RO(tcm_qla2xxx, version);
1803
1804 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1805         &tcm_qla2xxx_wwn_version.attr,
1806         NULL,
1807 };
1808
1809 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1810         .module                         = THIS_MODULE,
1811         .name                           = "qla2xxx",
1812         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1813         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1814         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1815         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1816         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1817         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1818         .tpg_check_demo_mode_write_protect =
1819                                         tcm_qla2xxx_check_demo_write_protect,
1820         .tpg_check_prod_mode_write_protect =
1821                                         tcm_qla2xxx_check_prod_write_protect,
1822         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1823         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1824         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1825         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1826         .release_cmd                    = tcm_qla2xxx_release_cmd,
1827         .shutdown_session               = tcm_qla2xxx_shutdown_session,
1828         .close_session                  = tcm_qla2xxx_close_session,
1829         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1830         .sess_get_initiator_sid         = NULL,
1831         .write_pending                  = tcm_qla2xxx_write_pending,
1832         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1833         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1834         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1835         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1836         .queue_status                   = tcm_qla2xxx_queue_status,
1837         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1838         .aborted_task                   = tcm_qla2xxx_aborted_task,
1839         /*
1840          * Setup function pointers for generic logic in
1841          * target_core_fabric_configfs.c
1842          */
1843         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1844         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1845         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1846         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1847         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1848
1849         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1850         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1851         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1852 };
1853
1854 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1855         .module                         = THIS_MODULE,
1856         .name                           = "qla2xxx_npiv",
1857         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1858         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
1859         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1860         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1861         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1862         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1863         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1864         .tpg_check_prod_mode_write_protect =
1865             tcm_qla2xxx_check_prod_write_protect,
1866         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1867         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1868         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1869         .release_cmd                    = tcm_qla2xxx_release_cmd,
1870         .shutdown_session               = tcm_qla2xxx_shutdown_session,
1871         .close_session                  = tcm_qla2xxx_close_session,
1872         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1873         .sess_get_initiator_sid         = NULL,
1874         .write_pending                  = tcm_qla2xxx_write_pending,
1875         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1876         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1877         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1878         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1879         .queue_status                   = tcm_qla2xxx_queue_status,
1880         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1881         .aborted_task                   = tcm_qla2xxx_aborted_task,
1882         /*
1883          * Setup function pointers for generic logic in
1884          * target_core_fabric_configfs.c
1885          */
1886         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1887         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1888         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1889         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1890         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1891
1892         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1893         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1894 };
1895
1896 static int tcm_qla2xxx_register_configfs(void)
1897 {
1898         int ret;
1899
1900         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on "
1901             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1902             utsname()->machine);
1903
1904         ret = target_register_template(&tcm_qla2xxx_ops);
1905         if (ret)
1906                 return ret;
1907
1908         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1909         if (ret)
1910                 goto out_fabric;
1911
1912         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1913                                                 WQ_MEM_RECLAIM, 0);
1914         if (!tcm_qla2xxx_free_wq) {
1915                 ret = -ENOMEM;
1916                 goto out_fabric_npiv;
1917         }
1918
1919         tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
1920         if (!tcm_qla2xxx_cmd_wq) {
1921                 ret = -ENOMEM;
1922                 goto out_free_wq;
1923         }
1924
1925         return 0;
1926
1927 out_free_wq:
1928         destroy_workqueue(tcm_qla2xxx_free_wq);
1929 out_fabric_npiv:
1930         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1931 out_fabric:
1932         target_unregister_template(&tcm_qla2xxx_ops);
1933         return ret;
1934 }
1935
1936 static void tcm_qla2xxx_deregister_configfs(void)
1937 {
1938         destroy_workqueue(tcm_qla2xxx_cmd_wq);
1939         destroy_workqueue(tcm_qla2xxx_free_wq);
1940
1941         target_unregister_template(&tcm_qla2xxx_ops);
1942         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1943 }
1944
1945 static int __init tcm_qla2xxx_init(void)
1946 {
1947         int ret;
1948
1949         ret = tcm_qla2xxx_register_configfs();
1950         if (ret < 0)
1951                 return ret;
1952
1953         return 0;
1954 }
1955
1956 static void __exit tcm_qla2xxx_exit(void)
1957 {
1958         tcm_qla2xxx_deregister_configfs();
1959 }
1960
1961 MODULE_DESCRIPTION("TCM QLA2XXX series NPIV enabled fabric driver");
1962 MODULE_LICENSE("GPL");
1963 module_init(tcm_qla2xxx_init);
1964 module_exit(tcm_qla2xxx_exit);