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->vha->tgt_counters.qla_core_ret_sta_ctio++;
 288         cmd->cmd_flags |= BIT_16;
 289         transport_generic_free_cmd(&cmd->se_cmd, 0);
 290 }
 291
 292 /*
 293  * Called from qla_target_template->free_cmd(), and will call
 294  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 295  * release callback.  qla_hw_data->hardware_lock is expected to be held
 296  */
 297 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 298 {
 299         cmd->vha->tgt_counters.core_qla_free_cmd++;
 300         cmd->cmd_in_wq = 1;
 301         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 302         queue_work_on(smp_processor_id(), 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->tgt.sess_lock, flags);
 348         target_sess_cmd_list_set_waiting(se_sess);
 349         spin_unlock_irqrestore(&vha->hw->tgt.sess_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->tgt.sess_lock, flags);
 364         qlt_unreg_sess(sess);
 365         spin_unlock_irqrestore(&vha->hw->tgt.sess_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         cmd->vha->tgt_counters.qla_core_sbt_cmd++;
 460         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 461                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 462                                 data_dir, flags);
 463 }
 464
 465 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 466 {
 467         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 468
 469         /*
 470          * Ensure that the complete FCP WRITE payload has been received.
 471          * Otherwise return an exception via CHECK_CONDITION status.
 472          */
 473         cmd->cmd_in_wq = 0;
 474         cmd->cmd_flags |= BIT_11;
 475         cmd->vha->tgt_counters.qla_core_ret_ctio++;
 476         if (!cmd->write_data_transferred) {
 477                 /*
 478                  * Check if se_cmd has already been aborted via LUN_RESET, and
 479                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
 480                  */
 481                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
 482                         complete(&cmd->se_cmd.t_transport_stop_comp);
 483                         return;
 484                 }
 485
 486                 if (cmd->se_cmd.pi_err)
 487                         transport_generic_request_failure(&cmd->se_cmd,
 488                                 cmd->se_cmd.pi_err);
 489                 else
 490                         transport_generic_request_failure(&cmd->se_cmd,
 491                                 TCM_CHECK_CONDITION_ABORT_CMD);
 492
 493                 return;
 494         }
 495
 496         return target_execute_cmd(&cmd->se_cmd);
 497 }
 498
 499 /*
 500  * Called from qla_target.c:qlt_do_ctio_completion()
 501  */
 502 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 503 {
 504         cmd->cmd_flags |= BIT_10;
 505         cmd->cmd_in_wq = 1;
 506         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 507         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 508 }
 509
 510 static void tcm_qla2xxx_handle_dif_work(struct work_struct *work)
 511 {
 512         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 513
 514         /* take an extra kref to prevent cmd free too early.
 515          * need to wait for SCSI status/check condition to
 516          * finish responding generate by transport_generic_request_failure.
 517          */
 518         kref_get(&cmd->se_cmd.cmd_kref);
 519         transport_generic_request_failure(&cmd->se_cmd, cmd->se_cmd.pi_err);
 520 }
 521
 522 /*
 523  * Called from qla_target.c:qlt_do_ctio_completion()
 524  */
 525 static void tcm_qla2xxx_handle_dif_err(struct qla_tgt_cmd *cmd)
 526 {
 527         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_dif_work);
 528         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 529 }
 530
 531 /*
 532  * Called from qla_target.c:qlt_issue_task_mgmt()
 533  */
 534 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
 535         uint8_t tmr_func, uint32_t tag)
 536 {
 537         struct qla_tgt_sess *sess = mcmd->sess;
 538         struct se_cmd *se_cmd = &mcmd->se_cmd;
 539
 540         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 541                         tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
 542 }
 543
 544 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 545 {
 546         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 547                                 struct qla_tgt_cmd, se_cmd);
 548
 549         cmd->cmd_flags |= BIT_4;
 550         cmd->bufflen = se_cmd->data_length;
 551         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 552
 553         cmd->sg_cnt = se_cmd->t_data_nents;
 554         cmd->sg = se_cmd->t_data_sg;
 555         cmd->offset = 0;
 556
 557         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 558         cmd->prot_sg = se_cmd->t_prot_sg;
 559         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 560         se_cmd->pi_err = 0;
 561
 562         /*
 563          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 564          */
 565         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 566                                 se_cmd->scsi_status);
 567 }
 568
 569 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 570 {
 571         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 572                                 struct qla_tgt_cmd, se_cmd);
 573         int xmit_type = QLA_TGT_XMIT_STATUS;
 574
 575         cmd->bufflen = se_cmd->data_length;
 576         cmd->sg = NULL;
 577         cmd->sg_cnt = 0;
 578         cmd->offset = 0;
 579         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 580         if (cmd->cmd_flags &  BIT_5) {
 581                 pr_crit("Bit_5 already set for cmd = %p.\n", cmd);
 582                 dump_stack();
 583         }
 584         cmd->cmd_flags |= BIT_5;
 585
 586         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 587                 /*
 588                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 589                  * for qla_tgt_xmit_response LLD code
 590                  */
 591                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 592                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 593                         se_cmd->residual_count = 0;
 594                 }
 595                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 596                 se_cmd->residual_count += se_cmd->data_length;
 597
 598                 cmd->bufflen = 0;
 599         }
 600         /*
 601          * Now queue status response to qla2xxx LLD code and response ring
 602          */
 603         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 604 }
 605
 606 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 607 {
 608         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 609         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 610                                 struct qla_tgt_mgmt_cmd, se_cmd);
 611
 612         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 613                         mcmd, se_tmr->function, se_tmr->response);
 614         /*
 615          * Do translation between TCM TM response codes and
 616          * QLA2xxx FC TM response codes.
 617          */
 618         switch (se_tmr->response) {
 619         case TMR_FUNCTION_COMPLETE:
 620                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 621                 break;
 622         case TMR_TASK_DOES_NOT_EXIST:
 623                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 624                 break;
 625         case TMR_FUNCTION_REJECTED:
 626                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 627                 break;
 628         case TMR_LUN_DOES_NOT_EXIST:
 629         default:
 630                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 631                 break;
 632         }
 633         /*
 634          * Queue the TM response to QLA2xxx LLD to build a
 635          * CTIO response packet.
 636          */
 637         qlt_xmit_tm_rsp(mcmd);
 638 }
 639
 640 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 641 {
 642         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 643                                 struct qla_tgt_cmd, se_cmd);
 644         qlt_abort_cmd(cmd);
 645 }
 646
 647 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 648                         struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *);
 649 /*
 650  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 651  */
 652 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
 653 {
 654         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 655         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 656         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 657         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 658                                 struct tcm_qla2xxx_lport, lport_wwn);
 659         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 660                                 struct tcm_qla2xxx_nacl, se_node_acl);
 661         void *node;
 662
 663         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 664
 665         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 666         if (WARN_ON(node && (node != se_nacl))) {
 667                 /*
 668                  * The nacl no longer matches what we think it should be.
 669                  * Most likely a new dynamic acl has been added while
 670                  * someone dropped the hardware lock.  It clearly is a
 671                  * bug elsewhere, but this bit can't make things worse.
 672                  */
 673                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 674                                node, GFP_ATOMIC);
 675         }
 676
 677         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 678             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 679         /*
 680          * Now clear the se_nacl and session pointers from our HW lport lookup
 681          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 682          *
 683          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 684          * target_wait_for_sess_cmds() before the session waits for outstanding
 685          * I/O to complete, to avoid a race between session shutdown execution
 686          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 687          */
 688         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 689 }
 690
 691 static void tcm_qla2xxx_release_session(struct kref *kref)
 692 {
 693         struct se_session *se_sess = container_of(kref,
 694                         struct se_session, sess_kref);
 695
 696         qlt_unreg_sess(se_sess->fabric_sess_ptr);
 697 }
 698
 699 static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess)
 700 {
 701         if (!sess)
 702                 return;
 703
 704         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 705         kref_put(&sess->se_sess->sess_kref, tcm_qla2xxx_release_session);
 706 }
 707
 708 static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess)
 709 {
 710         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 711         target_sess_cmd_list_set_waiting(sess->se_sess);
 712 }
 713
 714 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 715                 const char *name)
 716 {
 717         struct tcm_qla2xxx_nacl *nacl =
 718                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 719         u64 wwnn;
 720
 721         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 722                 return -EINVAL;
 723
 724         nacl->nport_wwnn = wwnn;
 725         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 726
 727         return 0;
 728 }
 729
 730 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 731
 732 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 733                                                                         \
 734 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
 735                 struct config_item *item, char *page)                   \
 736 {                                                                       \
 737         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 738         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 739                         struct tcm_qla2xxx_tpg, se_tpg);                \
 740                                                                         \
 741         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
 742 }                                                                       \
 743                                                                         \
 744 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
 745                 struct config_item *item, const char *page, size_t count) \
 746 {                                                                       \
 747         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 748         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 749                         struct tcm_qla2xxx_tpg, se_tpg);                \
 750         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 751         unsigned long val;                                              \
 752         int ret;                                                        \
 753                                                                         \
 754         ret = kstrtoul(page, 0, &val);                                  \
 755         if (ret < 0) {                                                  \
 756                 pr_err("kstrtoul() failed with"                         \
 757                                 " ret: %d\n", ret);                     \
 758                 return -EINVAL;                                         \
 759         }                                                               \
 760                                                                         \
 761         if ((val != 0) && (val != 1)) {                                 \
 762                 pr_err("Illegal boolean value %lu\n", val);             \
 763                 return -EINVAL;                                         \
 764         }                                                               \
 765                                                                         \
 766         a->name = val;                                                  \
 767                                                                         \
 768         return count;                                                   \
 769 }                                                                       \
 770 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 771
 772 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 773 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 774 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 775 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 776 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 777
 778 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 779         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 780         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 781         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 782         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 783         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 784         NULL,
 785 };
 786
 787 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 788
 789 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
 790                 char *page)
 791 {
 792         struct se_portal_group *se_tpg = to_tpg(item);
 793         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 794                         struct tcm_qla2xxx_tpg, se_tpg);
 795
 796         return snprintf(page, PAGE_SIZE, "%d\n",
 797                         atomic_read(&tpg->lport_tpg_enabled));
 798 }
 799
 800 static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
 801 {
 802         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 803                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 804         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 805         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 806
 807         if (!target_depend_item(&se_tpg->tpg_group.cg_item)) {
 808                 atomic_set(&base_tpg->lport_tpg_enabled, 1);
 809                 qlt_enable_vha(base_vha);
 810         }
 811         complete(&base_tpg->tpg_base_comp);
 812 }
 813
 814 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
 815 {
 816         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 817                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 818         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 819         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 820
 821         if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
 822                 atomic_set(&base_tpg->lport_tpg_enabled, 0);
 823                 target_undepend_item(&se_tpg->tpg_group.cg_item);
 824         }
 825         complete(&base_tpg->tpg_base_comp);
 826 }
 827
 828 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
 829                 const char *page, size_t count)
 830 {
 831         struct se_portal_group *se_tpg = to_tpg(item);
 832         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 833                         struct tcm_qla2xxx_tpg, se_tpg);
 834         unsigned long op;
 835         int rc;
 836
 837         rc = kstrtoul(page, 0, &op);
 838         if (rc < 0) {
 839                 pr_err("kstrtoul() returned %d\n", rc);
 840                 return -EINVAL;
 841         }
 842         if ((op != 1) && (op != 0)) {
 843                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 844                 return -EINVAL;
 845         }
 846         if (op) {
 847                 if (atomic_read(&tpg->lport_tpg_enabled))
 848                         return -EEXIST;
 849
 850                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
 851         } else {
 852                 if (!atomic_read(&tpg->lport_tpg_enabled))
 853                         return count;
 854
 855                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
 856         }
 857         init_completion(&tpg->tpg_base_comp);
 858         schedule_work(&tpg->tpg_base_work);
 859         wait_for_completion(&tpg->tpg_base_comp);
 860
 861         if (op) {
 862                 if (!atomic_read(&tpg->lport_tpg_enabled))
 863                         return -ENODEV;
 864         } else {
 865                 if (atomic_read(&tpg->lport_tpg_enabled))
 866                         return -EPERM;
 867         }
 868         return count;
 869 }
 870
 871 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
 872                 char *page)
 873 {
 874         return target_show_dynamic_sessions(to_tpg(item), page);
 875 }
 876
 877 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
 878                 const char *page, size_t count)
 879 {
 880         struct se_portal_group *se_tpg = to_tpg(item);
 881         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 882                                 struct tcm_qla2xxx_tpg, se_tpg);
 883         unsigned long val;
 884         int ret = kstrtoul(page, 0, &val);
 885
 886         if (ret) {
 887                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
 888                 return ret;
 889         }
 890         if (val != 0 && val != 1 && val != 3) {
 891                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
 892                 return -EINVAL;
 893         }
 894         tpg->tpg_attrib.fabric_prot_type = val;
 895
 896         return count;
 897 }
 898
 899 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
 900                 char *page)
 901 {
 902         struct se_portal_group *se_tpg = to_tpg(item);
 903         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 904                                 struct tcm_qla2xxx_tpg, se_tpg);
 905
 906         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
 907 }
 908
 909 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
 910 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
 911 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
 912
 913 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
 914         &tcm_qla2xxx_tpg_attr_enable,
 915         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
 916         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
 917         NULL,
 918 };
 919
 920 static struct se_portal_group *tcm_qla2xxx_make_tpg(
 921         struct se_wwn *wwn,
 922         struct config_group *group,
 923         const char *name)
 924 {
 925         struct tcm_qla2xxx_lport *lport = container_of(wwn,
 926                         struct tcm_qla2xxx_lport, lport_wwn);
 927         struct tcm_qla2xxx_tpg *tpg;
 928         unsigned long tpgt;
 929         int ret;
 930
 931         if (strstr(name, "tpgt_") != name)
 932                 return ERR_PTR(-EINVAL);
 933         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
 934                 return ERR_PTR(-EINVAL);
 935
 936         if ((tpgt != 1)) {
 937                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
 938                 return ERR_PTR(-ENOSYS);
 939         }
 940
 941         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
 942         if (!tpg) {
 943                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
 944                 return ERR_PTR(-ENOMEM);
 945         }
 946         tpg->lport = lport;
 947         tpg->lport_tpgt = tpgt;
 948         /*
 949          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
 950          * NodeACLs
 951          */
 952         tpg->tpg_attrib.generate_node_acls = 1;
 953         tpg->tpg_attrib.demo_mode_write_protect = 1;
 954         tpg->tpg_attrib.cache_dynamic_acls = 1;
 955         tpg->tpg_attrib.demo_mode_login_only = 1;
 956
 957         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
 958         if (ret < 0) {
 959                 kfree(tpg);
 960                 return NULL;
 961         }
 962
 963         lport->tpg_1 = tpg;
 964
 965         return &tpg->se_tpg;
 966 }
 967
 968 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
 969 {
 970         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 971                         struct tcm_qla2xxx_tpg, se_tpg);
 972         struct tcm_qla2xxx_lport *lport = tpg->lport;
 973         struct scsi_qla_host *vha = lport->qla_vha;
 974         /*
 975          * Call into qla2x_target.c LLD logic to shutdown the active
 976          * FC Nexuses and disable target mode operation for this qla_hw_data
 977          */
 978         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
 979                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
 980
 981         core_tpg_deregister(se_tpg);
 982         /*
 983          * Clear local TPG=1 pointer for non NPIV mode.
 984          */
 985         lport->tpg_1 = NULL;
 986         kfree(tpg);
 987 }
 988
 989 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
 990                 char *page)
 991 {
 992         return tcm_qla2xxx_tpg_enable_show(item, page);
 993 }
 994
 995 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
 996                 const char *page, size_t count)
 997 {
 998         struct se_portal_group *se_tpg = to_tpg(item);
 999         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1000         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1001                         struct tcm_qla2xxx_lport, lport_wwn);
1002         struct scsi_qla_host *vha = lport->qla_vha;
1003         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1004                         struct tcm_qla2xxx_tpg, se_tpg);
1005         unsigned long op;
1006         int rc;
1007
1008         rc = kstrtoul(page, 0, &op);
1009         if (rc < 0) {
1010                 pr_err("kstrtoul() returned %d\n", rc);
1011                 return -EINVAL;
1012         }
1013         if ((op != 1) && (op != 0)) {
1014                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1015                 return -EINVAL;
1016         }
1017         if (op) {
1018                 if (atomic_read(&tpg->lport_tpg_enabled))
1019                         return -EEXIST;
1020
1021                 atomic_set(&tpg->lport_tpg_enabled, 1);
1022                 qlt_enable_vha(vha);
1023         } else {
1024                 if (!atomic_read(&tpg->lport_tpg_enabled))
1025                         return count;
1026
1027                 atomic_set(&tpg->lport_tpg_enabled, 0);
1028                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1029         }
1030
1031         return count;
1032 }
1033
1034 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1035
1036 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1037         &tcm_qla2xxx_npiv_tpg_attr_enable,
1038         NULL,
1039 };
1040
1041 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1042         struct se_wwn *wwn,
1043         struct config_group *group,
1044         const char *name)
1045 {
1046         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1047                         struct tcm_qla2xxx_lport, lport_wwn);
1048         struct tcm_qla2xxx_tpg *tpg;
1049         unsigned long tpgt;
1050         int ret;
1051
1052         if (strstr(name, "tpgt_") != name)
1053                 return ERR_PTR(-EINVAL);
1054         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1055                 return ERR_PTR(-EINVAL);
1056
1057         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1058         if (!tpg) {
1059                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1060                 return ERR_PTR(-ENOMEM);
1061         }
1062         tpg->lport = lport;
1063         tpg->lport_tpgt = tpgt;
1064
1065         /*
1066          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1067          * NodeACLs
1068          */
1069         tpg->tpg_attrib.generate_node_acls = 1;
1070         tpg->tpg_attrib.demo_mode_write_protect = 1;
1071         tpg->tpg_attrib.cache_dynamic_acls = 1;
1072         tpg->tpg_attrib.demo_mode_login_only = 1;
1073
1074         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1075         if (ret < 0) {
1076                 kfree(tpg);
1077                 return NULL;
1078         }
1079         lport->tpg_1 = tpg;
1080         return &tpg->se_tpg;
1081 }
1082
1083 /*
1084  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1085  */
1086 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_s_id(
1087         scsi_qla_host_t *vha,
1088         const uint8_t *s_id)
1089 {
1090         struct tcm_qla2xxx_lport *lport;
1091         struct se_node_acl *se_nacl;
1092         struct tcm_qla2xxx_nacl *nacl;
1093         u32 key;
1094
1095         lport = vha->vha_tgt.target_lport_ptr;
1096         if (!lport) {
1097                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1098                 dump_stack();
1099                 return NULL;
1100         }
1101
1102         key = sid_to_key(s_id);
1103         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1104
1105         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1106         if (!se_nacl) {
1107                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1108                 return NULL;
1109         }
1110         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1111             se_nacl, se_nacl->initiatorname);
1112
1113         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1114         if (!nacl->qla_tgt_sess) {
1115                 pr_err("Unable to locate struct qla_tgt_sess\n");
1116                 return NULL;
1117         }
1118
1119         return nacl->qla_tgt_sess;
1120 }
1121
1122 /*
1123  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1124  */
1125 static void tcm_qla2xxx_set_sess_by_s_id(
1126         struct tcm_qla2xxx_lport *lport,
1127         struct se_node_acl *new_se_nacl,
1128         struct tcm_qla2xxx_nacl *nacl,
1129         struct se_session *se_sess,
1130         struct qla_tgt_sess *qla_tgt_sess,
1131         uint8_t *s_id)
1132 {
1133         u32 key;
1134         void *slot;
1135         int rc;
1136
1137         key = sid_to_key(s_id);
1138         pr_debug("set_sess_by_s_id: %06x\n", key);
1139
1140         slot = btree_lookup32(&lport->lport_fcport_map, key);
1141         if (!slot) {
1142                 if (new_se_nacl) {
1143                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1144                         nacl->nport_id = key;
1145                         rc = btree_insert32(&lport->lport_fcport_map, key,
1146                                         new_se_nacl, GFP_ATOMIC);
1147                         if (rc)
1148                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1149                                     (int)key);
1150                 } else {
1151                         pr_debug("Wiping nonexisting fc_port entry\n");
1152                 }
1153
1154                 qla_tgt_sess->se_sess = se_sess;
1155                 nacl->qla_tgt_sess = qla_tgt_sess;
1156                 return;
1157         }
1158
1159         if (nacl->qla_tgt_sess) {
1160                 if (new_se_nacl == NULL) {
1161                         pr_debug("Clearing existing nacl->qla_tgt_sess and fc_port entry\n");
1162                         btree_remove32(&lport->lport_fcport_map, key);
1163                         nacl->qla_tgt_sess = NULL;
1164                         return;
1165                 }
1166                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_port entry\n");
1167                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1168                 qla_tgt_sess->se_sess = se_sess;
1169                 nacl->qla_tgt_sess = qla_tgt_sess;
1170                 return;
1171         }
1172
1173         if (new_se_nacl == NULL) {
1174                 pr_debug("Clearing existing fc_port entry\n");
1175                 btree_remove32(&lport->lport_fcport_map, key);
1176                 return;
1177         }
1178
1179         pr_debug("Replacing existing fc_port entry w/o active nacl->qla_tgt_sess\n");
1180         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1181         qla_tgt_sess->se_sess = se_sess;
1182         nacl->qla_tgt_sess = qla_tgt_sess;
1183
1184         pr_debug("Setup nacl->qla_tgt_sess %p by s_id for se_nacl: %p, initiatorname: %s\n",
1185             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1186 }
1187
1188 /*
1189  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1190  */
1191 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_loop_id(
1192         scsi_qla_host_t *vha,
1193         const uint16_t loop_id)
1194 {
1195         struct tcm_qla2xxx_lport *lport;
1196         struct se_node_acl *se_nacl;
1197         struct tcm_qla2xxx_nacl *nacl;
1198         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1199
1200         lport = vha->vha_tgt.target_lport_ptr;
1201         if (!lport) {
1202                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1203                 dump_stack();
1204                 return NULL;
1205         }
1206
1207         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1208
1209         fc_loopid = lport->lport_loopid_map + loop_id;
1210         se_nacl = fc_loopid->se_nacl;
1211         if (!se_nacl) {
1212                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1213                     loop_id);
1214                 return NULL;
1215         }
1216
1217         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1218
1219         if (!nacl->qla_tgt_sess) {
1220                 pr_err("Unable to locate struct qla_tgt_sess\n");
1221                 return NULL;
1222         }
1223
1224         return nacl->qla_tgt_sess;
1225 }
1226
1227 /*
1228  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1229  */
1230 static void tcm_qla2xxx_set_sess_by_loop_id(
1231         struct tcm_qla2xxx_lport *lport,
1232         struct se_node_acl *new_se_nacl,
1233         struct tcm_qla2xxx_nacl *nacl,
1234         struct se_session *se_sess,
1235         struct qla_tgt_sess *qla_tgt_sess,
1236         uint16_t loop_id)
1237 {
1238         struct se_node_acl *saved_nacl;
1239         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1240
1241         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1242
1243         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1244                         lport->lport_loopid_map)[loop_id];
1245
1246         saved_nacl = fc_loopid->se_nacl;
1247         if (!saved_nacl) {
1248                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1249                 fc_loopid->se_nacl = new_se_nacl;
1250                 if (qla_tgt_sess->se_sess != se_sess)
1251                         qla_tgt_sess->se_sess = se_sess;
1252                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1253                         nacl->qla_tgt_sess = qla_tgt_sess;
1254                 return;
1255         }
1256
1257         if (nacl->qla_tgt_sess) {
1258                 if (new_se_nacl == NULL) {
1259                         pr_debug("Clearing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1260                         fc_loopid->se_nacl = NULL;
1261                         nacl->qla_tgt_sess = NULL;
1262                         return;
1263                 }
1264
1265                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1266                 fc_loopid->se_nacl = new_se_nacl;
1267                 if (qla_tgt_sess->se_sess != se_sess)
1268                         qla_tgt_sess->se_sess = se_sess;
1269                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1270                         nacl->qla_tgt_sess = qla_tgt_sess;
1271                 return;
1272         }
1273
1274         if (new_se_nacl == NULL) {
1275                 pr_debug("Clearing fc_loopid->se_nacl\n");
1276                 fc_loopid->se_nacl = NULL;
1277                 return;
1278         }
1279
1280         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->qla_tgt_sess\n");
1281         fc_loopid->se_nacl = new_se_nacl;
1282         if (qla_tgt_sess->se_sess != se_sess)
1283                 qla_tgt_sess->se_sess = se_sess;
1284         if (nacl->qla_tgt_sess != qla_tgt_sess)
1285                 nacl->qla_tgt_sess = qla_tgt_sess;
1286
1287         pr_debug("Setup nacl->qla_tgt_sess %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1288             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1289 }
1290
1291 /*
1292  * Should always be called with qla_hw_data->tgt.sess_lock held.
1293  */
1294 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1295                 struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess)
1296 {
1297         struct se_session *se_sess = sess->se_sess;
1298         unsigned char be_sid[3];
1299
1300         be_sid[0] = sess->s_id.b.domain;
1301         be_sid[1] = sess->s_id.b.area;
1302         be_sid[2] = sess->s_id.b.al_pa;
1303
1304         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1305                                 sess, be_sid);
1306         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1307                                 sess, sess->loop_id);
1308 }
1309
1310 static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
1311 {
1312         struct qla_tgt *tgt = sess->tgt;
1313         struct qla_hw_data *ha = tgt->ha;
1314         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1315         struct se_session *se_sess;
1316         struct tcm_qla2xxx_lport *lport;
1317
1318         BUG_ON(in_interrupt());
1319
1320         se_sess = sess->se_sess;
1321         if (!se_sess) {
1322                 pr_err("struct qla_tgt_sess->se_sess is NULL\n");
1323                 dump_stack();
1324                 return;
1325         }
1326
1327         lport = vha->vha_tgt.target_lport_ptr;
1328         if (!lport) {
1329                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1330                 dump_stack();
1331                 return;
1332         }
1333         target_wait_for_sess_cmds(se_sess);
1334
1335         transport_deregister_session_configfs(sess->se_sess);
1336         transport_deregister_session(sess->se_sess);
1337 }
1338
1339 /*
1340  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1341  * to locate struct se_node_acl
1342  */
1343 static int tcm_qla2xxx_check_initiator_node_acl(
1344         scsi_qla_host_t *vha,
1345         unsigned char *fc_wwpn,
1346         void *qla_tgt_sess,
1347         uint8_t *s_id,
1348         uint16_t loop_id)
1349 {
1350         struct qla_hw_data *ha = vha->hw;
1351         struct tcm_qla2xxx_lport *lport;
1352         struct tcm_qla2xxx_tpg *tpg;
1353         struct tcm_qla2xxx_nacl *nacl;
1354         struct se_portal_group *se_tpg;
1355         struct se_node_acl *se_nacl;
1356         struct se_session *se_sess;
1357         struct qla_tgt_sess *sess = qla_tgt_sess;
1358         unsigned char port_name[36];
1359         unsigned long flags;
1360         int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1361                        TCM_QLA2XXX_DEFAULT_TAGS;
1362
1363         lport = vha->vha_tgt.target_lport_ptr;
1364         if (!lport) {
1365                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1366                 dump_stack();
1367                 return -EINVAL;
1368         }
1369         /*
1370          * Locate the TPG=1 reference..
1371          */
1372         tpg = lport->tpg_1;
1373         if (!tpg) {
1374                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1375                 return -EINVAL;
1376         }
1377         se_tpg = &tpg->se_tpg;
1378
1379         se_sess = transport_init_session_tags(num_tags,
1380                                               sizeof(struct qla_tgt_cmd),
1381                                               TARGET_PROT_ALL);
1382         if (IS_ERR(se_sess)) {
1383                 pr_err("Unable to initialize struct se_session\n");
1384                 return PTR_ERR(se_sess);
1385         }
1386         /*
1387          * Format the FCP Initiator port_name into colon seperated values to
1388          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1389          */
1390         memset(&port_name, 0, 36);
1391         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1392         /*
1393          * Locate our struct se_node_acl either from an explict NodeACL created
1394          * via ConfigFS, or via running in TPG demo mode.
1395          */
1396         se_sess->se_node_acl = core_tpg_check_initiator_node_acl(se_tpg,
1397                                         port_name);
1398         if (!se_sess->se_node_acl) {
1399                 transport_free_session(se_sess);
1400                 return -EINVAL;
1401         }
1402         se_nacl = se_sess->se_node_acl;
1403         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1404         /*
1405          * And now setup the new se_nacl and session pointers into our HW lport
1406          * mappings for fabric S_ID and LOOP_ID.
1407          */
1408         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1409         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess,
1410                         qla_tgt_sess, s_id);
1411         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl, se_sess,
1412                         qla_tgt_sess, loop_id);
1413         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1414         /*
1415          * Finally register the new FC Nexus with TCM
1416          */
1417         transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
1418
1419         return 0;
1420 }
1421
1422 static void tcm_qla2xxx_update_sess(struct qla_tgt_sess *sess, port_id_t s_id,
1423                                     uint16_t loop_id, bool conf_compl_supported)
1424 {
1425         struct qla_tgt *tgt = sess->tgt;
1426         struct qla_hw_data *ha = tgt->ha;
1427         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1428         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1429         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1430         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1431                         struct tcm_qla2xxx_nacl, se_node_acl);
1432         u32 key;
1433
1434
1435         if (sess->loop_id != loop_id || sess->s_id.b24 != s_id.b24)
1436                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1437                     sess, sess->port_name,
1438                     sess->loop_id, loop_id, sess->s_id.b.domain,
1439                     sess->s_id.b.area, sess->s_id.b.al_pa, s_id.b.domain,
1440                     s_id.b.area, s_id.b.al_pa);
1441
1442         if (sess->loop_id != loop_id) {
1443                 /*
1444                  * Because we can shuffle loop IDs around and we
1445                  * update different sessions non-atomically, we might
1446                  * have overwritten this session's old loop ID
1447                  * already, and we might end up overwriting some other
1448                  * session that will be updated later.  So we have to
1449                  * be extra careful and we can't warn about those things...
1450                  */
1451                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1452                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1453
1454                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1455
1456                 sess->loop_id = loop_id;
1457         }
1458
1459         if (sess->s_id.b24 != s_id.b24) {
1460                 key = (((u32) sess->s_id.b.domain << 16) |
1461                        ((u32) sess->s_id.b.area   <<  8) |
1462                        ((u32) sess->s_id.b.al_pa));
1463
1464                 if (btree_lookup32(&lport->lport_fcport_map, key))
1465                         WARN(btree_remove32(&lport->lport_fcport_map, key) != se_nacl,
1466                              "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1467                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1468                 else
1469                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1470                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1471
1472                 key = (((u32) s_id.b.domain << 16) |
1473                        ((u32) s_id.b.area   <<  8) |
1474                        ((u32) s_id.b.al_pa));
1475
1476                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1477                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1478                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1479                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1480                 } else {
1481                         btree_insert32(&lport->lport_fcport_map, key, se_nacl, GFP_ATOMIC);
1482                 }
1483
1484                 sess->s_id = s_id;
1485                 nacl->nport_id = key;
1486         }
1487
1488         sess->conf_compl_supported = conf_compl_supported;
1489
1490         /* Reset logout parameters to default */
1491         sess->logout_on_delete = 1;
1492         sess->keep_nport_handle = 0;
1493 }
1494
1495 /*
1496  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1497  */
1498 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1499         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1500         .handle_data            = tcm_qla2xxx_handle_data,
1501         .handle_dif_err         = tcm_qla2xxx_handle_dif_err,
1502         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1503         .free_cmd               = tcm_qla2xxx_free_cmd,
1504         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1505         .free_session           = tcm_qla2xxx_free_session,
1506         .update_sess            = tcm_qla2xxx_update_sess,
1507         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1508         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1509         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1510         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1511         .put_sess               = tcm_qla2xxx_put_sess,
1512         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1513 };
1514
1515 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1516 {
1517         int rc;
1518
1519         rc = btree_init32(&lport->lport_fcport_map);
1520         if (rc) {
1521                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1522                 return rc;
1523         }
1524
1525         lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1526                                 65536);
1527         if (!lport->lport_loopid_map) {
1528                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1529                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1530                 btree_destroy32(&lport->lport_fcport_map);
1531                 return -ENOMEM;
1532         }
1533         memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1534                * 65536);
1535         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1536                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1537         return 0;
1538 }
1539
1540 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1541                                          void *target_lport_ptr,
1542                                          u64 npiv_wwpn, u64 npiv_wwnn)
1543 {
1544         struct qla_hw_data *ha = vha->hw;
1545         struct tcm_qla2xxx_lport *lport =
1546                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1547         /*
1548          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1549          */
1550         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1551         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1552         lport->qla_vha = vha;
1553
1554         return 0;
1555 }
1556
1557 static struct se_wwn *tcm_qla2xxx_make_lport(
1558         struct target_fabric_configfs *tf,
1559         struct config_group *group,
1560         const char *name)
1561 {
1562         struct tcm_qla2xxx_lport *lport;
1563         u64 wwpn;
1564         int ret = -ENODEV;
1565
1566         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1567                 return ERR_PTR(-EINVAL);
1568
1569         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1570         if (!lport) {
1571                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1572                 return ERR_PTR(-ENOMEM);
1573         }
1574         lport->lport_wwpn = wwpn;
1575         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1576                                 wwpn);
1577         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1578
1579         ret = tcm_qla2xxx_init_lport(lport);
1580         if (ret != 0)
1581                 goto out;
1582
1583         ret = qlt_lport_register(lport, wwpn, 0, 0,
1584                                  tcm_qla2xxx_lport_register_cb);
1585         if (ret != 0)
1586                 goto out_lport;
1587
1588         return &lport->lport_wwn;
1589 out_lport:
1590         vfree(lport->lport_loopid_map);
1591         btree_destroy32(&lport->lport_fcport_map);
1592 out:
1593         kfree(lport);
1594         return ERR_PTR(ret);
1595 }
1596
1597 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1598 {
1599         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1600                         struct tcm_qla2xxx_lport, lport_wwn);
1601         struct scsi_qla_host *vha = lport->qla_vha;
1602         struct se_node_acl *node;
1603         u32 key = 0;
1604
1605         /*
1606          * Call into qla2x_target.c LLD logic to complete the
1607          * shutdown of struct qla_tgt after the call to
1608          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1609          */
1610         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1611                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1612
1613         qlt_lport_deregister(vha);
1614
1615         vfree(lport->lport_loopid_map);
1616         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1617                 btree_remove32(&lport->lport_fcport_map, key);
1618         btree_destroy32(&lport->lport_fcport_map);
1619         kfree(lport);
1620 }
1621
1622 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1623                                               void *target_lport_ptr,
1624                                               u64 npiv_wwpn, u64 npiv_wwnn)
1625 {
1626         struct fc_vport *vport;
1627         struct Scsi_Host *sh = base_vha->host;
1628         struct scsi_qla_host *npiv_vha;
1629         struct tcm_qla2xxx_lport *lport =
1630                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1631         struct tcm_qla2xxx_lport *base_lport =
1632                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1633         struct fc_vport_identifiers vport_id;
1634
1635         if (!qla_tgt_mode_enabled(base_vha)) {
1636                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1637                 return -EPERM;
1638         }
1639
1640         if (!base_lport || !base_lport->tpg_1 ||
1641             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1642                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1643                 return -EPERM;
1644         }
1645
1646         memset(&vport_id, 0, sizeof(vport_id));
1647         vport_id.port_name = npiv_wwpn;
1648         vport_id.node_name = npiv_wwnn;
1649         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1650         vport_id.vport_type = FC_PORTTYPE_NPIV;
1651         vport_id.disable = false;
1652
1653         vport = fc_vport_create(sh, 0, &vport_id);
1654         if (!vport) {
1655                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1656                 return -ENODEV;
1657         }
1658         /*
1659          * Setup local pointer to NPIV vhba + target_lport_ptr
1660          */
1661         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1662         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1663         lport->qla_vha = npiv_vha;
1664         scsi_host_get(npiv_vha->host);
1665         return 0;
1666 }
1667
1668
1669 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1670         struct target_fabric_configfs *tf,
1671         struct config_group *group,
1672         const char *name)
1673 {
1674         struct tcm_qla2xxx_lport *lport;
1675         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1676         char *p, tmp[128];
1677         int ret;
1678
1679         snprintf(tmp, 128, "%s", name);
1680
1681         p = strchr(tmp, '@');
1682         if (!p) {
1683                 pr_err("Unable to locate NPIV '@' seperator\n");
1684                 return ERR_PTR(-EINVAL);
1685         }
1686         *p++ = '\0';
1687
1688         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1689                 return ERR_PTR(-EINVAL);
1690
1691         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1692                                        &npiv_wwpn, &npiv_wwnn) < 0)
1693                 return ERR_PTR(-EINVAL);
1694
1695         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1696         if (!lport) {
1697                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1698                 return ERR_PTR(-ENOMEM);
1699         }
1700         lport->lport_npiv_wwpn = npiv_wwpn;
1701         lport->lport_npiv_wwnn = npiv_wwnn;
1702         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1703
1704         ret = tcm_qla2xxx_init_lport(lport);
1705         if (ret != 0)
1706                 goto out;
1707
1708         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1709                                  tcm_qla2xxx_lport_register_npiv_cb);
1710         if (ret != 0)
1711                 goto out_lport;
1712
1713         return &lport->lport_wwn;
1714 out_lport:
1715         vfree(lport->lport_loopid_map);
1716         btree_destroy32(&lport->lport_fcport_map);
1717 out:
1718         kfree(lport);
1719         return ERR_PTR(ret);
1720 }
1721
1722 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1723 {
1724         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1725                         struct tcm_qla2xxx_lport, lport_wwn);
1726         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1727         struct qla_hw_data *ha = npiv_vha->hw;
1728         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1729
1730         scsi_host_put(npiv_vha->host);
1731         /*
1732          * Notify libfc that we want to release the vha->fc_vport
1733          */
1734         fc_vport_terminate(npiv_vha->fc_vport);
1735         scsi_host_put(base_vha->host);
1736         kfree(lport);
1737 }
1738
1739
1740 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1741                 char *page)
1742 {
1743         return sprintf(page,
1744             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on "
1745             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1746             utsname()->machine);
1747 }
1748
1749 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1750
1751 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1752         &tcm_qla2xxx_wwn_attr_version,
1753         NULL,
1754 };
1755
1756 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1757         .module                         = THIS_MODULE,
1758         .name                           = "qla2xxx",
1759         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1760         /*
1761          * XXX: Limit assumes single page per scatter-gather-list entry.
1762          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1763          */
1764         .max_data_sg_nents              = 1200,
1765         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1766         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1767         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1768         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1769         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1770         .tpg_check_demo_mode_write_protect =
1771                                         tcm_qla2xxx_check_demo_write_protect,
1772         .tpg_check_prod_mode_write_protect =
1773                                         tcm_qla2xxx_check_prod_write_protect,
1774         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1775         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1776         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1777         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1778         .release_cmd                    = tcm_qla2xxx_release_cmd,
1779         .shutdown_session               = tcm_qla2xxx_shutdown_session,
1780         .close_session                  = tcm_qla2xxx_close_session,
1781         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1782         .sess_get_initiator_sid         = NULL,
1783         .write_pending                  = tcm_qla2xxx_write_pending,
1784         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1785         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1786         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1787         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1788         .queue_status                   = tcm_qla2xxx_queue_status,
1789         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1790         .aborted_task                   = tcm_qla2xxx_aborted_task,
1791         /*
1792          * Setup function pointers for generic logic in
1793          * target_core_fabric_configfs.c
1794          */
1795         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1796         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1797         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1798         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1799         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1800
1801         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1802         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1803         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1804 };
1805
1806 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1807         .module                         = THIS_MODULE,
1808         .name                           = "qla2xxx_npiv",
1809         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1810         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
1811         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1812         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1813         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1814         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1815         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1816         .tpg_check_prod_mode_write_protect =
1817             tcm_qla2xxx_check_prod_write_protect,
1818         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1819         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1820         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1821         .release_cmd                    = tcm_qla2xxx_release_cmd,
1822         .shutdown_session               = tcm_qla2xxx_shutdown_session,
1823         .close_session                  = tcm_qla2xxx_close_session,
1824         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1825         .sess_get_initiator_sid         = NULL,
1826         .write_pending                  = tcm_qla2xxx_write_pending,
1827         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1828         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1829         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1830         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1831         .queue_status                   = tcm_qla2xxx_queue_status,
1832         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1833         .aborted_task                   = tcm_qla2xxx_aborted_task,
1834         /*
1835          * Setup function pointers for generic logic in
1836          * target_core_fabric_configfs.c
1837          */
1838         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1839         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1840         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1841         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1842         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1843
1844         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1845         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1846 };
1847
1848 static int tcm_qla2xxx_register_configfs(void)
1849 {
1850         int ret;
1851
1852         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on "
1853             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1854             utsname()->machine);
1855
1856         ret = target_register_template(&tcm_qla2xxx_ops);
1857         if (ret)
1858                 return ret;
1859
1860         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1861         if (ret)
1862                 goto out_fabric;
1863
1864         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1865                                                 WQ_MEM_RECLAIM, 0);
1866         if (!tcm_qla2xxx_free_wq) {
1867                 ret = -ENOMEM;
1868                 goto out_fabric_npiv;
1869         }
1870
1871         tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
1872         if (!tcm_qla2xxx_cmd_wq) {
1873                 ret = -ENOMEM;
1874                 goto out_free_wq;
1875         }
1876
1877         return 0;
1878
1879 out_free_wq:
1880         destroy_workqueue(tcm_qla2xxx_free_wq);
1881 out_fabric_npiv:
1882         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1883 out_fabric:
1884         target_unregister_template(&tcm_qla2xxx_ops);
1885         return ret;
1886 }
1887
1888 static void tcm_qla2xxx_deregister_configfs(void)
1889 {
1890         destroy_workqueue(tcm_qla2xxx_cmd_wq);
1891         destroy_workqueue(tcm_qla2xxx_free_wq);
1892
1893         target_unregister_template(&tcm_qla2xxx_ops);
1894         target_unregister_template(&tcm_qla2xxx_npiv_ops);
1895 }
1896
1897 static int __init tcm_qla2xxx_init(void)
1898 {
1899         int ret;
1900
1901         ret = tcm_qla2xxx_register_configfs();
1902         if (ret < 0)
1903                 return ret;
1904
1905         return 0;
1906 }
1907
1908 static void __exit tcm_qla2xxx_exit(void)
1909 {
1910         tcm_qla2xxx_deregister_configfs();
1911 }
1912
1913 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
1914 MODULE_LICENSE("GPL");
1915 module_init(tcm_qla2xxx_init);
1916 module_exit(tcm_qla2xxx_exit);