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->trc_flags & TRC_CMD_FREE);
 286
 287         cmd->vha->tgt_counters.qla_core_ret_sta_ctio++;
 288         cmd->trc_flags |= TRC_CMD_FREE;
 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
 302         WARN_ON(cmd->trc_flags & TRC_CMD_DONE);
 303         cmd->trc_flags |= TRC_CMD_DONE;
 304
 305         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 306         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 307 }
 308
 309 /*
 310  * Called from struct target_core_fabric_ops->check_stop_free() context
 311  */
 312 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 313 {
 314         struct qla_tgt_cmd *cmd;
 315
 316         if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) {
 317                 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 318                 cmd->trc_flags |= TRC_CMD_CHK_STOP;
 319         }
 320
 321         return target_put_sess_cmd(se_cmd);
 322 }
 323
 324 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 325  * fabric descriptor @se_cmd command to release
 326  */
 327 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 328 {
 329         struct qla_tgt_cmd *cmd;
 330
 331         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 332                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 333                                 struct qla_tgt_mgmt_cmd, se_cmd);
 334                 qlt_free_mcmd(mcmd);
 335                 return;
 336         }
 337
 338         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 339         qlt_free_cmd(cmd);
 340 }
 341
 342 static void tcm_qla2xxx_release_session(struct kref *kref)
 343 {
 344         struct fc_port  *sess = container_of(kref,
 345             struct fc_port, sess_kref);
 346
 347         qlt_unreg_sess(sess);
 348 }
 349
 350 static void tcm_qla2xxx_put_sess(struct fc_port *sess)
 351 {
 352         if (!sess)
 353                 return;
 354
 355         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 356         kref_put(&sess->sess_kref, tcm_qla2xxx_release_session);
 357 }
 358
 359 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 360 {
 361         struct fc_port *sess = se_sess->fabric_sess_ptr;
 362         struct scsi_qla_host *vha;
 363         unsigned long flags;
 364
 365         BUG_ON(!sess);
 366         vha = sess->vha;
 367
 368         spin_lock_irqsave(&vha->hw->tgt.sess_lock, flags);
 369         target_sess_cmd_list_set_waiting(se_sess);
 370         tcm_qla2xxx_put_sess(sess);
 371         spin_unlock_irqrestore(&vha->hw->tgt.sess_lock, flags);
 372 }
 373
 374 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 375 {
 376         return 0;
 377 }
 378
 379 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 380 {
 381         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 382                                 struct qla_tgt_cmd, se_cmd);
 383
 384         if (cmd->aborted) {
 385                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 386                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 387                  * already kick start the free.
 388                  */
 389                 pr_debug("write_pending aborted cmd[%p] refcount %d "
 390                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 391                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 392                         cmd->se_cmd.transport_state,
 393                         cmd->se_cmd.t_state,
 394                         cmd->se_cmd.se_cmd_flags);
 395                 return 0;
 396         }
 397         cmd->trc_flags |= TRC_XFR_RDY;
 398         cmd->bufflen = se_cmd->data_length;
 399         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 400
 401         cmd->sg_cnt = se_cmd->t_data_nents;
 402         cmd->sg = se_cmd->t_data_sg;
 403
 404         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 405         cmd->prot_sg = se_cmd->t_prot_sg;
 406         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 407         se_cmd->pi_err = 0;
 408
 409         /*
 410          * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
 411          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 412          */
 413         return qlt_rdy_to_xfer(cmd);
 414 }
 415
 416 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
 417 {
 418         unsigned long flags;
 419         /*
 420          * Check for WRITE_PENDING status to determine if we need to wait for
 421          * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
 422          */
 423         spin_lock_irqsave(&se_cmd->t_state_lock, flags);
 424         if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
 425             se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
 426                 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 427                 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
 428                                                 50);
 429                 return 0;
 430         }
 431         spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 432
 433         return 0;
 434 }
 435
 436 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 437 {
 438         return;
 439 }
 440
 441 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 442 {
 443         if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) {
 444                 struct qla_tgt_cmd *cmd = container_of(se_cmd,
 445                                 struct qla_tgt_cmd, se_cmd);
 446                 return cmd->state;
 447         }
 448
 449         return 0;
 450 }
 451
 452 /*
 453  * Called from process context in qla_target.c:qlt_do_work() code
 454  */
 455 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 456         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 457         int data_dir, int bidi)
 458 {
 459         struct se_cmd *se_cmd = &cmd->se_cmd;
 460         struct se_session *se_sess;
 461         struct fc_port *sess;
 462 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 463         struct se_portal_group *se_tpg;
 464         struct tcm_qla2xxx_tpg *tpg;
 465 #endif
 466         int flags = TARGET_SCF_ACK_KREF;
 467
 468         if (bidi)
 469                 flags |= TARGET_SCF_BIDI_OP;
 470
 471         if (se_cmd->cpuid != WORK_CPU_UNBOUND)
 472                 flags |= TARGET_SCF_USE_CPUID;
 473
 474         sess = cmd->sess;
 475         if (!sess) {
 476                 pr_err("Unable to locate struct fc_port from qla_tgt_cmd\n");
 477                 return -EINVAL;
 478         }
 479
 480         se_sess = sess->se_sess;
 481         if (!se_sess) {
 482                 pr_err("Unable to locate active struct se_session\n");
 483                 return -EINVAL;
 484         }
 485
 486 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 487         se_tpg = se_sess->se_tpg;
 488         tpg = container_of(se_tpg, struct tcm_qla2xxx_tpg, se_tpg);
 489         if (unlikely(tpg->tpg_attrib.jam_host)) {
 490                 /* return, and dont run target_submit_cmd,discarding command */
 491                 return 0;
 492         }
 493 #endif
 494
 495         cmd->vha->tgt_counters.qla_core_sbt_cmd++;
 496         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 497                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 498                                 data_dir, flags);
 499 }
 500
 501 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 502 {
 503         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 504         unsigned long flags;
 505
 506         /*
 507          * Ensure that the complete FCP WRITE payload has been received.
 508          * Otherwise return an exception via CHECK_CONDITION status.
 509          */
 510         cmd->cmd_in_wq = 0;
 511
 512         spin_lock_irqsave(&cmd->cmd_lock, flags);
 513         cmd->data_work = 1;
 514         if (cmd->aborted) {
 515                 cmd->data_work_free = 1;
 516                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
 517
 518                 tcm_qla2xxx_free_cmd(cmd);
 519                 return;
 520         }
 521         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
 522
 523         cmd->vha->tgt_counters.qla_core_ret_ctio++;
 524         if (!cmd->write_data_transferred) {
 525                 /*
 526                  * Check if se_cmd has already been aborted via LUN_RESET, and
 527                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
 528                  */
 529                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
 530                         complete(&cmd->se_cmd.t_transport_stop_comp);
 531                         return;
 532                 }
 533
 534                 switch (cmd->dif_err_code) {
 535                 case DIF_ERR_GRD:
 536                         cmd->se_cmd.pi_err =
 537                             TCM_LOGICAL_BLOCK_GUARD_CHECK_FAILED;
 538                         break;
 539                 case DIF_ERR_REF:
 540                         cmd->se_cmd.pi_err =
 541                             TCM_LOGICAL_BLOCK_REF_TAG_CHECK_FAILED;
 542                         break;
 543                 case DIF_ERR_APP:
 544                         cmd->se_cmd.pi_err =
 545                             TCM_LOGICAL_BLOCK_APP_TAG_CHECK_FAILED;
 546                         break;
 547                 case DIF_ERR_NONE:
 548                 default:
 549                         break;
 550                 }
 551
 552                 if (cmd->se_cmd.pi_err)
 553                         transport_generic_request_failure(&cmd->se_cmd,
 554                                 cmd->se_cmd.pi_err);
 555                 else
 556                         transport_generic_request_failure(&cmd->se_cmd,
 557                                 TCM_CHECK_CONDITION_ABORT_CMD);
 558
 559                 return;
 560         }
 561
 562         return target_execute_cmd(&cmd->se_cmd);
 563 }
 564
 565 /*
 566  * Called from qla_target.c:qlt_do_ctio_completion()
 567  */
 568 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 569 {
 570         cmd->trc_flags |= TRC_DATA_IN;
 571         cmd->cmd_in_wq = 1;
 572         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 573         queue_work_on(smp_processor_id(), tcm_qla2xxx_free_wq, &cmd->work);
 574 }
 575
 576 static int tcm_qla2xxx_chk_dif_tags(uint32_t tag)
 577 {
 578         return 0;
 579 }
 580
 581 static int tcm_qla2xxx_dif_tags(struct qla_tgt_cmd *cmd,
 582     uint16_t *pfw_prot_opts)
 583 {
 584         struct se_cmd *se_cmd = &cmd->se_cmd;
 585
 586         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_GUARD))
 587                 *pfw_prot_opts |= PO_DISABLE_GUARD_CHECK;
 588
 589         if (!(se_cmd->prot_checks & TARGET_DIF_CHECK_APPTAG))
 590                 *pfw_prot_opts |= PO_DIS_APP_TAG_VALD;
 591
 592         return 0;
 593 }
 594
 595 /*
 596  * Called from qla_target.c:qlt_issue_task_mgmt()
 597  */
 598 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
 599         uint16_t tmr_func, uint32_t tag)
 600 {
 601         struct fc_port *sess = mcmd->sess;
 602         struct se_cmd *se_cmd = &mcmd->se_cmd;
 603         int transl_tmr_func = 0;
 604
 605         switch (tmr_func) {
 606         case QLA_TGT_ABTS:
 607                 pr_debug("%ld: ABTS received\n", sess->vha->host_no);
 608                 transl_tmr_func = TMR_ABORT_TASK;
 609                 break;
 610         case QLA_TGT_2G_ABORT_TASK:
 611                 pr_debug("%ld: 2G Abort Task received\n", sess->vha->host_no);
 612                 transl_tmr_func = TMR_ABORT_TASK;
 613                 break;
 614         case QLA_TGT_CLEAR_ACA:
 615                 pr_debug("%ld: CLEAR_ACA received\n", sess->vha->host_no);
 616                 transl_tmr_func = TMR_CLEAR_ACA;
 617                 break;
 618         case QLA_TGT_TARGET_RESET:
 619                 pr_debug("%ld: TARGET_RESET received\n", sess->vha->host_no);
 620                 transl_tmr_func = TMR_TARGET_WARM_RESET;
 621                 break;
 622         case QLA_TGT_LUN_RESET:
 623                 pr_debug("%ld: LUN_RESET received\n", sess->vha->host_no);
 624                 transl_tmr_func = TMR_LUN_RESET;
 625                 break;
 626         case QLA_TGT_CLEAR_TS:
 627                 pr_debug("%ld: CLEAR_TS received\n", sess->vha->host_no);
 628                 transl_tmr_func = TMR_CLEAR_TASK_SET;
 629                 break;
 630         case QLA_TGT_ABORT_TS:
 631                 pr_debug("%ld: ABORT_TS received\n", sess->vha->host_no);
 632                 transl_tmr_func = TMR_ABORT_TASK_SET;
 633                 break;
 634         default:
 635                 pr_debug("%ld: Unknown task mgmt fn 0x%x\n",
 636                     sess->vha->host_no, tmr_func);
 637                 return -ENOSYS;
 638         }
 639
 640         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 641             transl_tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
 642 }
 643
 644 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 645 {
 646         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 647                                 struct qla_tgt_cmd, se_cmd);
 648
 649         if (cmd->aborted) {
 650                 /* Cmd can loop during Q-full.  tcm_qla2xxx_aborted_task
 651                  * can get ahead of this cmd. tcm_qla2xxx_aborted_task
 652                  * already kick start the free.
 653                  */
 654                 pr_debug("queue_data_in aborted cmd[%p] refcount %d "
 655                         "transport_state %x, t_state %x, se_cmd_flags %x\n",
 656                         cmd, kref_read(&cmd->se_cmd.cmd_kref),
 657                         cmd->se_cmd.transport_state,
 658                         cmd->se_cmd.t_state,
 659                         cmd->se_cmd.se_cmd_flags);
 660                 return 0;
 661         }
 662
 663         cmd->trc_flags |= TRC_XMIT_DATA;
 664         cmd->bufflen = se_cmd->data_length;
 665         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 666
 667         cmd->sg_cnt = se_cmd->t_data_nents;
 668         cmd->sg = se_cmd->t_data_sg;
 669         cmd->offset = 0;
 670
 671         cmd->prot_sg_cnt = se_cmd->t_prot_nents;
 672         cmd->prot_sg = se_cmd->t_prot_sg;
 673         cmd->blk_sz  = se_cmd->se_dev->dev_attrib.block_size;
 674         se_cmd->pi_err = 0;
 675
 676         /*
 677          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 678          */
 679         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 680                                 se_cmd->scsi_status);
 681 }
 682
 683 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 684 {
 685         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 686                                 struct qla_tgt_cmd, se_cmd);
 687         int xmit_type = QLA_TGT_XMIT_STATUS;
 688
 689         cmd->bufflen = se_cmd->data_length;
 690         cmd->sg = NULL;
 691         cmd->sg_cnt = 0;
 692         cmd->offset = 0;
 693         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 694         if (cmd->trc_flags & TRC_XMIT_STATUS) {
 695                 pr_crit("Multiple calls for status = %p.\n", cmd);
 696                 dump_stack();
 697         }
 698         cmd->trc_flags |= TRC_XMIT_STATUS;
 699
 700         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 701                 /*
 702                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 703                  * for qla_tgt_xmit_response LLD code
 704                  */
 705                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 706                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 707                         se_cmd->residual_count = 0;
 708                 }
 709                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 710                 se_cmd->residual_count += se_cmd->data_length;
 711
 712                 cmd->bufflen = 0;
 713         }
 714         /*
 715          * Now queue status response to qla2xxx LLD code and response ring
 716          */
 717         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 718 }
 719
 720 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 721 {
 722         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 723         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 724                                 struct qla_tgt_mgmt_cmd, se_cmd);
 725
 726         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 727                         mcmd, se_tmr->function, se_tmr->response);
 728         /*
 729          * Do translation between TCM TM response codes and
 730          * QLA2xxx FC TM response codes.
 731          */
 732         switch (se_tmr->response) {
 733         case TMR_FUNCTION_COMPLETE:
 734                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 735                 break;
 736         case TMR_TASK_DOES_NOT_EXIST:
 737                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 738                 break;
 739         case TMR_FUNCTION_REJECTED:
 740                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 741                 break;
 742         case TMR_LUN_DOES_NOT_EXIST:
 743         default:
 744                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 745                 break;
 746         }
 747         /*
 748          * Queue the TM response to QLA2xxx LLD to build a
 749          * CTIO response packet.
 750          */
 751         qlt_xmit_tm_rsp(mcmd);
 752 }
 753
 754 #define DATA_WORK_NOT_FREE(_cmd) (_cmd->data_work && !_cmd->data_work_free)
 755 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd)
 756 {
 757         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 758                                 struct qla_tgt_cmd, se_cmd);
 759         unsigned long flags;
 760
 761         if (qlt_abort_cmd(cmd))
 762                 return;
 763
 764         spin_lock_irqsave(&cmd->cmd_lock, flags);
 765         if ((cmd->state == QLA_TGT_STATE_NEW)||
 766             ((cmd->state == QLA_TGT_STATE_DATA_IN) &&
 767                 DATA_WORK_NOT_FREE(cmd))) {
 768                 cmd->data_work_free = 1;
 769                 spin_unlock_irqrestore(&cmd->cmd_lock, flags);
 770                 /*
 771                  * cmd has not reached fw, Use this trigger to free it.
 772                  */
 773                 tcm_qla2xxx_free_cmd(cmd);
 774                 return;
 775         }
 776         spin_unlock_irqrestore(&cmd->cmd_lock, flags);
 777         return;
 778
 779 }
 780
 781 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 782                         struct tcm_qla2xxx_nacl *, struct fc_port *);
 783 /*
 784  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
 785  */
 786 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct fc_port *sess)
 787 {
 788         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 789         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 790         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 791         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 792                                 struct tcm_qla2xxx_lport, lport_wwn);
 793         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 794                                 struct tcm_qla2xxx_nacl, se_node_acl);
 795         void *node;
 796
 797         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 798
 799         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 800         if (WARN_ON(node && (node != se_nacl))) {
 801                 /*
 802                  * The nacl no longer matches what we think it should be.
 803                  * Most likely a new dynamic acl has been added while
 804                  * someone dropped the hardware lock.  It clearly is a
 805                  * bug elsewhere, but this bit can't make things worse.
 806                  */
 807                 btree_insert32(&lport->lport_fcport_map, nacl->nport_id,
 808                                node, GFP_ATOMIC);
 809         }
 810
 811         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 812             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 813         /*
 814          * Now clear the se_nacl and session pointers from our HW lport lookup
 815          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 816          *
 817          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 818          * target_wait_for_sess_cmds() before the session waits for outstanding
 819          * I/O to complete, to avoid a race between session shutdown execution
 820          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 821          */
 822         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 823 }
 824
 825 static void tcm_qla2xxx_shutdown_sess(struct fc_port *sess)
 826 {
 827         assert_spin_locked(&sess->vha->hw->tgt.sess_lock);
 828         target_sess_cmd_list_set_waiting(sess->se_sess);
 829 }
 830
 831 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl,
 832                 const char *name)
 833 {
 834         struct tcm_qla2xxx_nacl *nacl =
 835                 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 836         u64 wwnn;
 837
 838         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 839                 return -EINVAL;
 840
 841         nacl->nport_wwnn = wwnn;
 842         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 843
 844         return 0;
 845 }
 846
 847 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 848
 849 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 850                                                                         \
 851 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show(                    \
 852                 struct config_item *item, char *page)                   \
 853 {                                                                       \
 854         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 855         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 856                         struct tcm_qla2xxx_tpg, se_tpg);                \
 857                                                                         \
 858         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
 859 }                                                                       \
 860                                                                         \
 861 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store(                   \
 862                 struct config_item *item, const char *page, size_t count) \
 863 {                                                                       \
 864         struct se_portal_group *se_tpg = attrib_to_tpg(item);           \
 865         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 866                         struct tcm_qla2xxx_tpg, se_tpg);                \
 867         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 868         unsigned long val;                                              \
 869         int ret;                                                        \
 870                                                                         \
 871         ret = kstrtoul(page, 0, &val);                                  \
 872         if (ret < 0) {                                                  \
 873                 pr_err("kstrtoul() failed with"                         \
 874                                 " ret: %d\n", ret);                     \
 875                 return -EINVAL;                                         \
 876         }                                                               \
 877                                                                         \
 878         if ((val != 0) && (val != 1)) {                                 \
 879                 pr_err("Illegal boolean value %lu\n", val);             \
 880                 return -EINVAL;                                         \
 881         }                                                               \
 882                                                                         \
 883         a->name = val;                                                  \
 884                                                                         \
 885         return count;                                                   \
 886 }                                                                       \
 887 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name)
 888
 889 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 890 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 891 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 892 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 893 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 894 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 895 DEF_QLA_TPG_ATTRIB(jam_host);
 896 #endif
 897
 898 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 899         &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls,
 900         &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls,
 901         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect,
 902         &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect,
 903         &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only,
 904 #ifdef CONFIG_TCM_QLA2XXX_DEBUG
 905         &tcm_qla2xxx_tpg_attrib_attr_jam_host,
 906 #endif
 907         NULL,
 908 };
 909
 910 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 911
 912 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item,
 913                 char *page)
 914 {
 915         struct se_portal_group *se_tpg = to_tpg(item);
 916         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 917                         struct tcm_qla2xxx_tpg, se_tpg);
 918
 919         return snprintf(page, PAGE_SIZE, "%d\n",
 920                         atomic_read(&tpg->lport_tpg_enabled));
 921 }
 922
 923 static void tcm_qla2xxx_depend_tpg(struct work_struct *work)
 924 {
 925         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 926                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 927         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 928         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 929
 930         if (!target_depend_item(&se_tpg->tpg_group.cg_item)) {
 931                 atomic_set(&base_tpg->lport_tpg_enabled, 1);
 932                 qlt_enable_vha(base_vha);
 933         }
 934         complete(&base_tpg->tpg_base_comp);
 935 }
 936
 937 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work)
 938 {
 939         struct tcm_qla2xxx_tpg *base_tpg = container_of(work,
 940                                 struct tcm_qla2xxx_tpg, tpg_base_work);
 941         struct se_portal_group *se_tpg = &base_tpg->se_tpg;
 942         struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha;
 943
 944         if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) {
 945                 atomic_set(&base_tpg->lport_tpg_enabled, 0);
 946                 target_undepend_item(&se_tpg->tpg_group.cg_item);
 947         }
 948         complete(&base_tpg->tpg_base_comp);
 949 }
 950
 951 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item,
 952                 const char *page, size_t count)
 953 {
 954         struct se_portal_group *se_tpg = to_tpg(item);
 955         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 956                         struct tcm_qla2xxx_tpg, se_tpg);
 957         unsigned long op;
 958         int rc;
 959
 960         rc = kstrtoul(page, 0, &op);
 961         if (rc < 0) {
 962                 pr_err("kstrtoul() returned %d\n", rc);
 963                 return -EINVAL;
 964         }
 965         if ((op != 1) && (op != 0)) {
 966                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 967                 return -EINVAL;
 968         }
 969         if (op) {
 970                 if (atomic_read(&tpg->lport_tpg_enabled))
 971                         return -EEXIST;
 972
 973                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg);
 974         } else {
 975                 if (!atomic_read(&tpg->lport_tpg_enabled))
 976                         return count;
 977
 978                 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg);
 979         }
 980         init_completion(&tpg->tpg_base_comp);
 981         schedule_work(&tpg->tpg_base_work);
 982         wait_for_completion(&tpg->tpg_base_comp);
 983
 984         if (op) {
 985                 if (!atomic_read(&tpg->lport_tpg_enabled))
 986                         return -ENODEV;
 987         } else {
 988                 if (atomic_read(&tpg->lport_tpg_enabled))
 989                         return -EPERM;
 990         }
 991         return count;
 992 }
 993
 994 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item,
 995                 char *page)
 996 {
 997         return target_show_dynamic_sessions(to_tpg(item), page);
 998 }
 999
1000 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item,
1001                 const char *page, size_t count)
1002 {
1003         struct se_portal_group *se_tpg = to_tpg(item);
1004         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1005                                 struct tcm_qla2xxx_tpg, se_tpg);
1006         unsigned long val;
1007         int ret = kstrtoul(page, 0, &val);
1008
1009         if (ret) {
1010                 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret);
1011                 return ret;
1012         }
1013         if (val != 0 && val != 1 && val != 3) {
1014                 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val);
1015                 return -EINVAL;
1016         }
1017         tpg->tpg_attrib.fabric_prot_type = val;
1018
1019         return count;
1020 }
1021
1022 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item,
1023                 char *page)
1024 {
1025         struct se_portal_group *se_tpg = to_tpg(item);
1026         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1027                                 struct tcm_qla2xxx_tpg, se_tpg);
1028
1029         return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type);
1030 }
1031
1032 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable);
1033 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions);
1034 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type);
1035
1036 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
1037         &tcm_qla2xxx_tpg_attr_enable,
1038         &tcm_qla2xxx_tpg_attr_dynamic_sessions,
1039         &tcm_qla2xxx_tpg_attr_fabric_prot_type,
1040         NULL,
1041 };
1042
1043 static struct se_portal_group *tcm_qla2xxx_make_tpg(
1044         struct se_wwn *wwn,
1045         struct config_group *group,
1046         const char *name)
1047 {
1048         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1049                         struct tcm_qla2xxx_lport, lport_wwn);
1050         struct tcm_qla2xxx_tpg *tpg;
1051         unsigned long tpgt;
1052         int ret;
1053
1054         if (strstr(name, "tpgt_") != name)
1055                 return ERR_PTR(-EINVAL);
1056         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1057                 return ERR_PTR(-EINVAL);
1058
1059         if ((tpgt != 1)) {
1060                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1061                 return ERR_PTR(-ENOSYS);
1062         }
1063
1064         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1065         if (!tpg) {
1066                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1067                 return ERR_PTR(-ENOMEM);
1068         }
1069         tpg->lport = lport;
1070         tpg->lport_tpgt = tpgt;
1071         /*
1072          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1073          * NodeACLs
1074          */
1075         tpg->tpg_attrib.generate_node_acls = 1;
1076         tpg->tpg_attrib.demo_mode_write_protect = 1;
1077         tpg->tpg_attrib.cache_dynamic_acls = 1;
1078         tpg->tpg_attrib.demo_mode_login_only = 1;
1079         tpg->tpg_attrib.jam_host = 0;
1080
1081         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1082         if (ret < 0) {
1083                 kfree(tpg);
1084                 return NULL;
1085         }
1086
1087         lport->tpg_1 = tpg;
1088
1089         return &tpg->se_tpg;
1090 }
1091
1092 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1093 {
1094         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1095                         struct tcm_qla2xxx_tpg, se_tpg);
1096         struct tcm_qla2xxx_lport *lport = tpg->lport;
1097         struct scsi_qla_host *vha = lport->qla_vha;
1098         /*
1099          * Call into qla2x_target.c LLD logic to shutdown the active
1100          * FC Nexuses and disable target mode operation for this qla_hw_data
1101          */
1102         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1103                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1104
1105         core_tpg_deregister(se_tpg);
1106         /*
1107          * Clear local TPG=1 pointer for non NPIV mode.
1108          */
1109         lport->tpg_1 = NULL;
1110         kfree(tpg);
1111 }
1112
1113 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item,
1114                 char *page)
1115 {
1116         return tcm_qla2xxx_tpg_enable_show(item, page);
1117 }
1118
1119 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item,
1120                 const char *page, size_t count)
1121 {
1122         struct se_portal_group *se_tpg = to_tpg(item);
1123         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
1124         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
1125                         struct tcm_qla2xxx_lport, lport_wwn);
1126         struct scsi_qla_host *vha = lport->qla_vha;
1127         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1128                         struct tcm_qla2xxx_tpg, se_tpg);
1129         unsigned long op;
1130         int rc;
1131
1132         rc = kstrtoul(page, 0, &op);
1133         if (rc < 0) {
1134                 pr_err("kstrtoul() returned %d\n", rc);
1135                 return -EINVAL;
1136         }
1137         if ((op != 1) && (op != 0)) {
1138                 pr_err("Illegal value for tpg_enable: %lu\n", op);
1139                 return -EINVAL;
1140         }
1141         if (op) {
1142                 if (atomic_read(&tpg->lport_tpg_enabled))
1143                         return -EEXIST;
1144
1145                 atomic_set(&tpg->lport_tpg_enabled, 1);
1146                 qlt_enable_vha(vha);
1147         } else {
1148                 if (!atomic_read(&tpg->lport_tpg_enabled))
1149                         return count;
1150
1151                 atomic_set(&tpg->lport_tpg_enabled, 0);
1152                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1153         }
1154
1155         return count;
1156 }
1157
1158 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable);
1159
1160 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = {
1161         &tcm_qla2xxx_npiv_tpg_attr_enable,
1162         NULL,
1163 };
1164
1165 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1166         struct se_wwn *wwn,
1167         struct config_group *group,
1168         const char *name)
1169 {
1170         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1171                         struct tcm_qla2xxx_lport, lport_wwn);
1172         struct tcm_qla2xxx_tpg *tpg;
1173         unsigned long tpgt;
1174         int ret;
1175
1176         if (strstr(name, "tpgt_") != name)
1177                 return ERR_PTR(-EINVAL);
1178         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1179                 return ERR_PTR(-EINVAL);
1180
1181         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1182         if (!tpg) {
1183                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1184                 return ERR_PTR(-ENOMEM);
1185         }
1186         tpg->lport = lport;
1187         tpg->lport_tpgt = tpgt;
1188
1189         /*
1190          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1191          * NodeACLs
1192          */
1193         tpg->tpg_attrib.generate_node_acls = 1;
1194         tpg->tpg_attrib.demo_mode_write_protect = 1;
1195         tpg->tpg_attrib.cache_dynamic_acls = 1;
1196         tpg->tpg_attrib.demo_mode_login_only = 1;
1197
1198         ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP);
1199         if (ret < 0) {
1200                 kfree(tpg);
1201                 return NULL;
1202         }
1203         lport->tpg_1 = tpg;
1204         return &tpg->se_tpg;
1205 }
1206
1207 /*
1208  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1209  */
1210 static struct fc_port *tcm_qla2xxx_find_sess_by_s_id(
1211         scsi_qla_host_t *vha,
1212         const uint8_t *s_id)
1213 {
1214         struct tcm_qla2xxx_lport *lport;
1215         struct se_node_acl *se_nacl;
1216         struct tcm_qla2xxx_nacl *nacl;
1217         u32 key;
1218
1219         lport = vha->vha_tgt.target_lport_ptr;
1220         if (!lport) {
1221                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1222                 dump_stack();
1223                 return NULL;
1224         }
1225
1226         key = sid_to_key(s_id);
1227         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1228
1229         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1230         if (!se_nacl) {
1231                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1232                 return NULL;
1233         }
1234         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1235             se_nacl, se_nacl->initiatorname);
1236
1237         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1238         if (!nacl->fc_port) {
1239                 pr_err("Unable to locate struct fc_port\n");
1240                 return NULL;
1241         }
1242
1243         return nacl->fc_port;
1244 }
1245
1246 /*
1247  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1248  */
1249 static void tcm_qla2xxx_set_sess_by_s_id(
1250         struct tcm_qla2xxx_lport *lport,
1251         struct se_node_acl *new_se_nacl,
1252         struct tcm_qla2xxx_nacl *nacl,
1253         struct se_session *se_sess,
1254         struct fc_port *fc_port,
1255         uint8_t *s_id)
1256 {
1257         u32 key;
1258         void *slot;
1259         int rc;
1260
1261         key = sid_to_key(s_id);
1262         pr_debug("set_sess_by_s_id: %06x\n", key);
1263
1264         slot = btree_lookup32(&lport->lport_fcport_map, key);
1265         if (!slot) {
1266                 if (new_se_nacl) {
1267                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1268                         nacl->nport_id = key;
1269                         rc = btree_insert32(&lport->lport_fcport_map, key,
1270                                         new_se_nacl, GFP_ATOMIC);
1271                         if (rc)
1272                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1273                                     (int)key);
1274                 } else {
1275                         pr_debug("Wiping nonexisting fc_port entry\n");
1276                 }
1277
1278                 fc_port->se_sess = se_sess;
1279                 nacl->fc_port = fc_port;
1280                 return;
1281         }
1282
1283         if (nacl->fc_port) {
1284                 if (new_se_nacl == NULL) {
1285                         pr_debug("Clearing existing nacl->fc_port and fc_port entry\n");
1286                         btree_remove32(&lport->lport_fcport_map, key);
1287                         nacl->fc_port = NULL;
1288                         return;
1289                 }
1290                 pr_debug("Replacing existing nacl->fc_port and fc_port entry\n");
1291                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1292                 fc_port->se_sess = se_sess;
1293                 nacl->fc_port = fc_port;
1294                 return;
1295         }
1296
1297         if (new_se_nacl == NULL) {
1298                 pr_debug("Clearing existing fc_port entry\n");
1299                 btree_remove32(&lport->lport_fcport_map, key);
1300                 return;
1301         }
1302
1303         pr_debug("Replacing existing fc_port entry w/o active nacl->fc_port\n");
1304         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1305         fc_port->se_sess = se_sess;
1306         nacl->fc_port = fc_port;
1307
1308         pr_debug("Setup nacl->fc_port %p by s_id for se_nacl: %p, initiatorname: %s\n",
1309             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1310 }
1311
1312 /*
1313  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1314  */
1315 static struct fc_port *tcm_qla2xxx_find_sess_by_loop_id(
1316         scsi_qla_host_t *vha,
1317         const uint16_t loop_id)
1318 {
1319         struct tcm_qla2xxx_lport *lport;
1320         struct se_node_acl *se_nacl;
1321         struct tcm_qla2xxx_nacl *nacl;
1322         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1323
1324         lport = vha->vha_tgt.target_lport_ptr;
1325         if (!lport) {
1326                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1327                 dump_stack();
1328                 return NULL;
1329         }
1330
1331         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1332
1333         fc_loopid = lport->lport_loopid_map + loop_id;
1334         se_nacl = fc_loopid->se_nacl;
1335         if (!se_nacl) {
1336                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1337                     loop_id);
1338                 return NULL;
1339         }
1340
1341         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1342
1343         if (!nacl->fc_port) {
1344                 pr_err("Unable to locate struct fc_port\n");
1345                 return NULL;
1346         }
1347
1348         return nacl->fc_port;
1349 }
1350
1351 /*
1352  * Expected to be called with struct qla_hw_data->tgt.sess_lock held
1353  */
1354 static void tcm_qla2xxx_set_sess_by_loop_id(
1355         struct tcm_qla2xxx_lport *lport,
1356         struct se_node_acl *new_se_nacl,
1357         struct tcm_qla2xxx_nacl *nacl,
1358         struct se_session *se_sess,
1359         struct fc_port *fc_port,
1360         uint16_t loop_id)
1361 {
1362         struct se_node_acl *saved_nacl;
1363         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1364
1365         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1366
1367         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1368                         lport->lport_loopid_map)[loop_id];
1369
1370         saved_nacl = fc_loopid->se_nacl;
1371         if (!saved_nacl) {
1372                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1373                 fc_loopid->se_nacl = new_se_nacl;
1374                 if (fc_port->se_sess != se_sess)
1375                         fc_port->se_sess = se_sess;
1376                 if (nacl->fc_port != fc_port)
1377                         nacl->fc_port = fc_port;
1378                 return;
1379         }
1380
1381         if (nacl->fc_port) {
1382                 if (new_se_nacl == NULL) {
1383                         pr_debug("Clearing nacl->fc_port and fc_loopid->se_nacl\n");
1384                         fc_loopid->se_nacl = NULL;
1385                         nacl->fc_port = NULL;
1386                         return;
1387                 }
1388
1389                 pr_debug("Replacing existing nacl->fc_port and fc_loopid->se_nacl\n");
1390                 fc_loopid->se_nacl = new_se_nacl;
1391                 if (fc_port->se_sess != se_sess)
1392                         fc_port->se_sess = se_sess;
1393                 if (nacl->fc_port != fc_port)
1394                         nacl->fc_port = fc_port;
1395                 return;
1396         }
1397
1398         if (new_se_nacl == NULL) {
1399                 pr_debug("Clearing fc_loopid->se_nacl\n");
1400                 fc_loopid->se_nacl = NULL;
1401                 return;
1402         }
1403
1404         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->fc_port\n");
1405         fc_loopid->se_nacl = new_se_nacl;
1406         if (fc_port->se_sess != se_sess)
1407                 fc_port->se_sess = se_sess;
1408         if (nacl->fc_port != fc_port)
1409                 nacl->fc_port = fc_port;
1410
1411         pr_debug("Setup nacl->fc_port %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1412             nacl->fc_port, new_se_nacl, new_se_nacl->initiatorname);
1413 }
1414
1415 /*
1416  * Should always be called with qla_hw_data->tgt.sess_lock held.
1417  */
1418 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1419                 struct tcm_qla2xxx_nacl *nacl, struct fc_port *sess)
1420 {
1421         struct se_session *se_sess = sess->se_sess;
1422         unsigned char be_sid[3];
1423
1424         be_sid[0] = sess->d_id.b.domain;
1425         be_sid[1] = sess->d_id.b.area;
1426         be_sid[2] = sess->d_id.b.al_pa;
1427
1428         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1429                                 sess, be_sid);
1430         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1431                                 sess, sess->loop_id);
1432 }
1433
1434 static void tcm_qla2xxx_free_session(struct fc_port *sess)
1435 {
1436         struct qla_tgt *tgt = sess->tgt;
1437         struct qla_hw_data *ha = tgt->ha;
1438         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1439         struct se_session *se_sess;
1440         struct tcm_qla2xxx_lport *lport;
1441
1442         BUG_ON(in_interrupt());
1443
1444         se_sess = sess->se_sess;
1445         if (!se_sess) {
1446                 pr_err("struct fc_port->se_sess is NULL\n");
1447                 dump_stack();
1448                 return;
1449         }
1450
1451         lport = vha->vha_tgt.target_lport_ptr;
1452         if (!lport) {
1453                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1454                 dump_stack();
1455                 return;
1456         }
1457         target_wait_for_sess_cmds(se_sess);
1458
1459         transport_deregister_session_configfs(sess->se_sess);
1460         transport_deregister_session(sess->se_sess);
1461 }
1462
1463 static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg,
1464                                   struct se_session *se_sess, void *p)
1465 {
1466         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1467                                 struct tcm_qla2xxx_tpg, se_tpg);
1468         struct tcm_qla2xxx_lport *lport = tpg->lport;
1469         struct qla_hw_data *ha = lport->qla_vha->hw;
1470         struct se_node_acl *se_nacl = se_sess->se_node_acl;
1471         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1472                                 struct tcm_qla2xxx_nacl, se_node_acl);
1473         struct fc_port *qlat_sess = p;
1474         uint16_t loop_id = qlat_sess->loop_id;
1475         unsigned long flags;
1476         unsigned char be_sid[3];
1477
1478         be_sid[0] = qlat_sess->d_id.b.domain;
1479         be_sid[1] = qlat_sess->d_id.b.area;
1480         be_sid[2] = qlat_sess->d_id.b.al_pa;
1481
1482         /*
1483          * And now setup se_nacl and session pointers into HW lport internal
1484          * mappings for fabric S_ID and LOOP_ID.
1485          */
1486         spin_lock_irqsave(&ha->tgt.sess_lock, flags);
1487         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl,
1488                                      se_sess, qlat_sess, be_sid);
1489         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl,
1490                                         se_sess, qlat_sess, loop_id);
1491         spin_unlock_irqrestore(&ha->tgt.sess_lock, flags);
1492
1493         return 0;
1494 }
1495
1496 /*
1497  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1498  * to locate struct se_node_acl
1499  */
1500 static int tcm_qla2xxx_check_initiator_node_acl(
1501         scsi_qla_host_t *vha,
1502         unsigned char *fc_wwpn,
1503         struct fc_port *qlat_sess)
1504 {
1505         struct qla_hw_data *ha = vha->hw;
1506         struct tcm_qla2xxx_lport *lport;
1507         struct tcm_qla2xxx_tpg *tpg;
1508         struct se_session *se_sess;
1509         unsigned char port_name[36];
1510         int num_tags = (ha->cur_fw_xcb_count) ? ha->cur_fw_xcb_count :
1511                        TCM_QLA2XXX_DEFAULT_TAGS;
1512
1513         lport = vha->vha_tgt.target_lport_ptr;
1514         if (!lport) {
1515                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1516                 dump_stack();
1517                 return -EINVAL;
1518         }
1519         /*
1520          * Locate the TPG=1 reference..
1521          */
1522         tpg = lport->tpg_1;
1523         if (!tpg) {
1524                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1525                 return -EINVAL;
1526         }
1527         /*
1528          * Format the FCP Initiator port_name into colon seperated values to
1529          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1530          */
1531         memset(&port_name, 0, 36);
1532         snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn);
1533         /*
1534          * Locate our struct se_node_acl either from an explict NodeACL created
1535          * via ConfigFS, or via running in TPG demo mode.
1536          */
1537         se_sess = target_alloc_session(&tpg->se_tpg, num_tags,
1538                                        sizeof(struct qla_tgt_cmd),
1539                                        TARGET_PROT_ALL, port_name,
1540                                        qlat_sess, tcm_qla2xxx_session_cb);
1541         if (IS_ERR(se_sess))
1542                 return PTR_ERR(se_sess);
1543
1544         return 0;
1545 }
1546
1547 static void tcm_qla2xxx_update_sess(struct fc_port *sess, port_id_t s_id,
1548                                     uint16_t loop_id, bool conf_compl_supported)
1549 {
1550         struct qla_tgt *tgt = sess->tgt;
1551         struct qla_hw_data *ha = tgt->ha;
1552         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1553         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1554         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1555         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1556                         struct tcm_qla2xxx_nacl, se_node_acl);
1557         u32 key;
1558
1559
1560         if (sess->loop_id != loop_id || sess->d_id.b24 != s_id.b24)
1561                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1562                     sess, sess->port_name,
1563                     sess->loop_id, loop_id, sess->d_id.b.domain,
1564                     sess->d_id.b.area, sess->d_id.b.al_pa, s_id.b.domain,
1565                     s_id.b.area, s_id.b.al_pa);
1566
1567         if (sess->loop_id != loop_id) {
1568                 /*
1569                  * Because we can shuffle loop IDs around and we
1570                  * update different sessions non-atomically, we might
1571                  * have overwritten this session's old loop ID
1572                  * already, and we might end up overwriting some other
1573                  * session that will be updated later.  So we have to
1574                  * be extra careful and we can't warn about those things...
1575                  */
1576                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1577                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1578
1579                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1580
1581                 sess->loop_id = loop_id;
1582         }
1583
1584         if (sess->d_id.b24 != s_id.b24) {
1585                 key = (((u32) sess->d_id.b.domain << 16) |
1586                        ((u32) sess->d_id.b.area   <<  8) |
1587                        ((u32) sess->d_id.b.al_pa));
1588
1589                 if (btree_lookup32(&lport->lport_fcport_map, key))
1590                         WARN(btree_remove32(&lport->lport_fcport_map, key) !=
1591                             se_nacl, "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1592                             sess->d_id.b.domain, sess->d_id.b.area,
1593                             sess->d_id.b.al_pa);
1594                 else
1595                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1596                              sess->d_id.b.domain, sess->d_id.b.area,
1597                              sess->d_id.b.al_pa);
1598
1599                 key = (((u32) s_id.b.domain << 16) |
1600                        ((u32) s_id.b.area   <<  8) |
1601                        ((u32) s_id.b.al_pa));
1602
1603                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1604                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1605                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1606                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1607                 } else {
1608                         btree_insert32(&lport->lport_fcport_map, key, se_nacl,
1609                             GFP_ATOMIC);
1610                 }
1611
1612                 sess->d_id = s_id;
1613                 nacl->nport_id = key;
1614         }
1615
1616         sess->conf_compl_supported = conf_compl_supported;
1617
1618         /* Reset logout parameters to default */
1619         sess->logout_on_delete = 1;
1620         sess->keep_nport_handle = 0;
1621 }
1622
1623 /*
1624  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1625  */
1626 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1627         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1628         .handle_data            = tcm_qla2xxx_handle_data,
1629         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1630         .free_cmd               = tcm_qla2xxx_free_cmd,
1631         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1632         .free_session           = tcm_qla2xxx_free_session,
1633         .update_sess            = tcm_qla2xxx_update_sess,
1634         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1635         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1636         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1637         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1638         .put_sess               = tcm_qla2xxx_put_sess,
1639         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1640         .get_dif_tags           = tcm_qla2xxx_dif_tags,
1641         .chk_dif_tags           = tcm_qla2xxx_chk_dif_tags,
1642 };
1643
1644 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1645 {
1646         int rc;
1647
1648         rc = btree_init32(&lport->lport_fcport_map);
1649         if (rc) {
1650                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1651                 return rc;
1652         }
1653
1654         lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1655                                 65536);
1656         if (!lport->lport_loopid_map) {
1657                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1658                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1659                 btree_destroy32(&lport->lport_fcport_map);
1660                 return -ENOMEM;
1661         }
1662         memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1663                * 65536);
1664         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1665                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1666         return 0;
1667 }
1668
1669 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1670                                          void *target_lport_ptr,
1671                                          u64 npiv_wwpn, u64 npiv_wwnn)
1672 {
1673         struct qla_hw_data *ha = vha->hw;
1674         struct tcm_qla2xxx_lport *lport =
1675                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1676         /*
1677          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1678          */
1679         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1680         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1681         lport->qla_vha = vha;
1682
1683         return 0;
1684 }
1685
1686 static struct se_wwn *tcm_qla2xxx_make_lport(
1687         struct target_fabric_configfs *tf,
1688         struct config_group *group,
1689         const char *name)
1690 {
1691         struct tcm_qla2xxx_lport *lport;
1692         u64 wwpn;
1693         int ret = -ENODEV;
1694
1695         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1696                 return ERR_PTR(-EINVAL);
1697
1698         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1699         if (!lport) {
1700                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1701                 return ERR_PTR(-ENOMEM);
1702         }
1703         lport->lport_wwpn = wwpn;
1704         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1705                                 wwpn);
1706         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1707
1708         ret = tcm_qla2xxx_init_lport(lport);
1709         if (ret != 0)
1710                 goto out;
1711
1712         ret = qlt_lport_register(lport, wwpn, 0, 0,
1713                                  tcm_qla2xxx_lport_register_cb);
1714         if (ret != 0)
1715                 goto out_lport;
1716
1717         return &lport->lport_wwn;
1718 out_lport:
1719         vfree(lport->lport_loopid_map);
1720         btree_destroy32(&lport->lport_fcport_map);
1721 out:
1722         kfree(lport);
1723         return ERR_PTR(ret);
1724 }
1725
1726 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1727 {
1728         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1729                         struct tcm_qla2xxx_lport, lport_wwn);
1730         struct scsi_qla_host *vha = lport->qla_vha;
1731         struct se_node_acl *node;
1732         u32 key = 0;
1733
1734         /*
1735          * Call into qla2x_target.c LLD logic to complete the
1736          * shutdown of struct qla_tgt after the call to
1737          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1738          */
1739         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1740                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1741
1742         qlt_lport_deregister(vha);
1743
1744         vfree(lport->lport_loopid_map);
1745         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1746                 btree_remove32(&lport->lport_fcport_map, key);
1747         btree_destroy32(&lport->lport_fcport_map);
1748         kfree(lport);
1749 }
1750
1751 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1752                                               void *target_lport_ptr,
1753                                               u64 npiv_wwpn, u64 npiv_wwnn)
1754 {
1755         struct fc_vport *vport;
1756         struct Scsi_Host *sh = base_vha->host;
1757         struct scsi_qla_host *npiv_vha;
1758         struct tcm_qla2xxx_lport *lport =
1759                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1760         struct tcm_qla2xxx_lport *base_lport =
1761                         (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr;
1762         struct fc_vport_identifiers vport_id;
1763
1764         if (qla_ini_mode_enabled(base_vha)) {
1765                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1766                 return -EPERM;
1767         }
1768
1769         if (!base_lport || !base_lport->tpg_1 ||
1770             !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) {
1771                 pr_err("qla2xxx base_lport or tpg_1 not available\n");
1772                 return -EPERM;
1773         }
1774
1775         memset(&vport_id, 0, sizeof(vport_id));
1776         vport_id.port_name = npiv_wwpn;
1777         vport_id.node_name = npiv_wwnn;
1778         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1779         vport_id.vport_type = FC_PORTTYPE_NPIV;
1780         vport_id.disable = false;
1781
1782         vport = fc_vport_create(sh, 0, &vport_id);
1783         if (!vport) {
1784                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1785                 return -ENODEV;
1786         }
1787         /*
1788          * Setup local pointer to NPIV vhba + target_lport_ptr
1789          */
1790         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1791         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1792         lport->qla_vha = npiv_vha;
1793         scsi_host_get(npiv_vha->host);
1794         return 0;
1795 }
1796
1797
1798 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1799         struct target_fabric_configfs *tf,
1800         struct config_group *group,
1801         const char *name)
1802 {
1803         struct tcm_qla2xxx_lport *lport;
1804         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1805         char *p, tmp[128];
1806         int ret;
1807
1808         snprintf(tmp, 128, "%s", name);
1809
1810         p = strchr(tmp, '@');
1811         if (!p) {
1812                 pr_err("Unable to locate NPIV '@' separator\n");
1813                 return ERR_PTR(-EINVAL);
1814         }
1815         *p++ = '\0';
1816
1817         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1818                 return ERR_PTR(-EINVAL);
1819
1820         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1821                                        &npiv_wwpn, &npiv_wwnn) < 0)
1822                 return ERR_PTR(-EINVAL);
1823
1824         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1825         if (!lport) {
1826                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1827                 return ERR_PTR(-ENOMEM);
1828         }
1829         lport->lport_npiv_wwpn = npiv_wwpn;
1830         lport->lport_npiv_wwnn = npiv_wwnn;
1831         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1832
1833         ret = tcm_qla2xxx_init_lport(lport);
1834         if (ret != 0)
1835                 goto out;
1836
1837         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1838                                  tcm_qla2xxx_lport_register_npiv_cb);
1839         if (ret != 0)
1840                 goto out_lport;
1841
1842         return &lport->lport_wwn;
1843 out_lport:
1844         vfree(lport->lport_loopid_map);
1845         btree_destroy32(&lport->lport_fcport_map);
1846 out:
1847         kfree(lport);
1848         return ERR_PTR(ret);
1849 }
1850
1851 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1852 {
1853         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1854                         struct tcm_qla2xxx_lport, lport_wwn);
1855         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1856         struct qla_hw_data *ha = npiv_vha->hw;
1857         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1858
1859         scsi_host_put(npiv_vha->host);
1860         /*
1861          * Notify libfc that we want to release the vha->fc_vport
1862          */
1863         fc_vport_terminate(npiv_vha->fc_vport);
1864         scsi_host_put(base_vha->host);
1865         kfree(lport);
1866 }
1867
1868
1869 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item,
1870                 char *page)
1871 {
1872         return sprintf(page,
1873             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on "
1874             UTS_RELEASE"\n", QLA2XXX_VERSION, utsname()->sysname,
1875             utsname()->machine);
1876 }
1877
1878 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version);
1879
1880 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1881         &tcm_qla2xxx_wwn_attr_version,
1882         NULL,
1883 };
1884
1885 static const struct target_core_fabric_ops tcm_qla2xxx_ops = {
1886         .module                         = THIS_MODULE,
1887         .name                           = "qla2xxx",
1888         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1889         /*
1890          * XXX: Limit assumes single page per scatter-gather-list entry.
1891          * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096
1892          */
1893         .max_data_sg_nents              = 1200,
1894         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1895         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1896         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1897         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1898         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1899         .tpg_check_demo_mode_write_protect =
1900                                         tcm_qla2xxx_check_demo_write_protect,
1901         .tpg_check_prod_mode_write_protect =
1902                                         tcm_qla2xxx_check_prod_write_protect,
1903         .tpg_check_prot_fabric_only     = tcm_qla2xxx_check_prot_fabric_only,
1904         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1905         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1906         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1907         .release_cmd                    = tcm_qla2xxx_release_cmd,
1908         .close_session                  = tcm_qla2xxx_close_session,
1909         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1910         .sess_get_initiator_sid         = NULL,
1911         .write_pending                  = tcm_qla2xxx_write_pending,
1912         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1913         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1914         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1915         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1916         .queue_status                   = tcm_qla2xxx_queue_status,
1917         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1918         .aborted_task                   = tcm_qla2xxx_aborted_task,
1919         /*
1920          * Setup function pointers for generic logic in
1921          * target_core_fabric_configfs.c
1922          */
1923         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1924         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1925         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1926         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1927         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1928
1929         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1930         .tfc_tpg_base_attrs             = tcm_qla2xxx_tpg_attrs,
1931         .tfc_tpg_attrib_attrs           = tcm_qla2xxx_tpg_attrib_attrs,
1932 };
1933
1934 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1935         .module                         = THIS_MODULE,
1936         .name                           = "qla2xxx_npiv",
1937         .node_acl_size                  = sizeof(struct tcm_qla2xxx_nacl),
1938         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
1939         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1940         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1941         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1942         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1943         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1944         .tpg_check_prod_mode_write_protect =
1945             tcm_qla2xxx_check_prod_write_protect,
1946         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1947         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1948         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1949         .release_cmd                    = tcm_qla2xxx_release_cmd,
1950         .close_session                  = tcm_qla2xxx_close_session,
1951         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1952         .sess_get_initiator_sid         = NULL,
1953         .write_pending                  = tcm_qla2xxx_write_pending,
1954         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1955         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1956         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1957         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1958         .queue_status                   = tcm_qla2xxx_queue_status,
1959         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1960         .aborted_task                   = tcm_qla2xxx_aborted_task,
1961         /*
1962          * Setup function pointers for generic logic in
1963          * target_core_fabric_configfs.c
1964          */
1965         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1966         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1967         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1968         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1969         .fabric_init_nodeacl            = tcm_qla2xxx_init_nodeacl,
1970
1971         .tfc_wwn_attrs                  = tcm_qla2xxx_wwn_attrs,
1972         .tfc_tpg_base_attrs             = tcm_qla2xxx_npiv_tpg_attrs,
1973 };
1974
1975 static int tcm_qla2xxx_register_configfs(void)
1976 {
1977         int ret;
1978
1979         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on "
1980             UTS_RELEASE"\n", QLA2XXX_VERSION, utsname()->sysname,
1981             utsname()->machine);
1982
1983         ret = target_register_template(&tcm_qla2xxx_ops);
1984         if (ret)
1985                 return ret;
1986
1987         ret = target_register_template(&tcm_qla2xxx_npiv_ops);
1988         if (ret)
1989                 goto out_fabric;
1990
1991         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1992                                                 WQ_MEM_RECLAIM, 0);
1993         if (!tcm_qla2xxx_free_wq) {
1994                 ret = -ENOMEM;
1995                 goto out_fabric_npiv;
1996         }
1997
1998         tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
1999         if (!tcm_qla2xxx_cmd_wq) {
2000                 ret = -ENOMEM;
2001                 goto out_free_wq;
2002         }
2003
2004         return 0;
2005
2006 out_free_wq:
2007         destroy_workqueue(tcm_qla2xxx_free_wq);
2008 out_fabric_npiv:
2009         target_unregister_template(&tcm_qla2xxx_npiv_ops);
2010 out_fabric:
2011         target_unregister_template(&tcm_qla2xxx_ops);
2012         return ret;
2013 }
2014
2015 static void tcm_qla2xxx_deregister_configfs(void)
2016 {
2017         destroy_workqueue(tcm_qla2xxx_cmd_wq);
2018         destroy_workqueue(tcm_qla2xxx_free_wq);
2019
2020         target_unregister_template(&tcm_qla2xxx_ops);
2021         target_unregister_template(&tcm_qla2xxx_npiv_ops);
2022 }
2023
2024 static int __init tcm_qla2xxx_init(void)
2025 {
2026         int ret;
2027
2028         ret = tcm_qla2xxx_register_configfs();
2029         if (ret < 0)
2030                 return ret;
2031
2032         return 0;
2033 }
2034
2035 static void __exit tcm_qla2xxx_exit(void)
2036 {
2037         tcm_qla2xxx_deregister_configfs();
2038 }
2039
2040 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver");
2041 MODULE_LICENSE("GPL");
2042 module_init(tcm_qla2xxx_init);
2043 module_exit(tcm_qla2xxx_exit);