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/init.h>
  31 #include <linux/list.h>
  32 #include <linux/slab.h>
  33 #include <linux/kthread.h>
  34 #include <linux/types.h>
  35 #include <linux/string.h>
  36 #include <linux/configfs.h>
  37 #include <linux/ctype.h>
  38 #include <asm/unaligned.h>
  39 #include <scsi/scsi.h>
  40 #include <scsi/scsi_host.h>
  41 #include <scsi/scsi_device.h>
  42 #include <scsi/scsi_cmnd.h>
  43 #include <target/target_core_base.h>
  44 #include <target/target_core_fabric.h>
  45 #include <target/target_core_fabric_configfs.h>
  46 #include <target/target_core_configfs.h>
  47 #include <target/configfs_macros.h>
  48
  49 #include "qla_def.h"
  50 #include "qla_target.h"
  51 #include "tcm_qla2xxx.h"
  52
  53 struct workqueue_struct *tcm_qla2xxx_free_wq;
  54 struct workqueue_struct *tcm_qla2xxx_cmd_wq;
  55
  56 /*
  57  * Parse WWN.
  58  * If strict, we require lower-case hex and colon separators to be sure
  59  * the name is the same as what would be generated by ft_format_wwn()
  60  * so the name and wwn are mapped one-to-one.
  61  */
  62 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
  63 {
  64         const char *cp;
  65         char c;
  66         u32 nibble;
  67         u32 byte = 0;
  68         u32 pos = 0;
  69         u32 err;
  70
  71         *wwn = 0;
  72         for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
  73                 c = *cp;
  74                 if (c == '\n' && cp[1] == '\0')
  75                         continue;
  76                 if (strict && pos++ == 2 && byte++ < 7) {
  77                         pos = 0;
  78                         if (c == ':')
  79                                 continue;
  80                         err = 1;
  81                         goto fail;
  82                 }
  83                 if (c == '\0') {
  84                         err = 2;
  85                         if (strict && byte != 8)
  86                                 goto fail;
  87                         return cp - name;
  88                 }
  89                 err = 3;
  90                 if (isdigit(c))
  91                         nibble = c - '0';
  92                 else if (isxdigit(c) && (islower(c) || !strict))
  93                         nibble = tolower(c) - 'a' + 10;
  94                 else
  95                         goto fail;
  96                 *wwn = (*wwn << 4) | nibble;
  97         }
  98         err = 4;
  99 fail:
 100         pr_debug("err %u len %zu pos %u byte %u\n",
 101                         err, cp - name, pos, byte);
 102         return -1;
 103 }
 104
 105 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
 106 {
 107         u8 b[8];
 108
 109         put_unaligned_be64(wwn, b);
 110         return snprintf(buf, len,
 111                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 112                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
 113 }
 114
 115 static char *tcm_qla2xxx_get_fabric_name(void)
 116 {
 117         return "qla2xxx";
 118 }
 119
 120 /*
 121  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
 122  */
 123 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
 124 {
 125         unsigned int i, j;
 126         u8 wwn[8];
 127
 128         memset(wwn, 0, sizeof(wwn));
 129
 130         /* Validate and store the new name */
 131         for (i = 0, j = 0; i < 16; i++) {
 132                 int value;
 133
 134                 value = hex_to_bin(*ns++);
 135                 if (value >= 0)
 136                         j = (j << 4) | value;
 137                 else
 138                         return -EINVAL;
 139
 140                 if (i % 2) {
 141                         wwn[i/2] = j & 0xff;
 142                         j = 0;
 143                 }
 144         }
 145
 146         *nm = wwn_to_u64(wwn);
 147         return 0;
 148 }
 149
 150 /*
 151  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 152  * store_fc_host_vport_create()
 153  */
 154 static int tcm_qla2xxx_npiv_parse_wwn(
 155         const char *name,
 156         size_t count,
 157         u64 *wwpn,
 158         u64 *wwnn)
 159 {
 160         unsigned int cnt = count;
 161         int rc;
 162
 163         *wwpn = 0;
 164         *wwnn = 0;
 165
 166         /* count may include a LF at end of string */
 167         if (name[cnt-1] == '\n' || name[cnt-1] == 0)
 168                 cnt--;
 169
 170         /* validate we have enough characters for WWPN */
 171         if ((cnt != (16+1+16)) || (name[16] != ':'))
 172                 return -EINVAL;
 173
 174         rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
 175         if (rc != 0)
 176                 return rc;
 177
 178         rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
 179         if (rc != 0)
 180                 return rc;
 181
 182         return 0;
 183 }
 184
 185 static ssize_t tcm_qla2xxx_npiv_format_wwn(char *buf, size_t len,
 186                                         u64 wwpn, u64 wwnn)
 187 {
 188         u8 b[8], b2[8];
 189
 190         put_unaligned_be64(wwpn, b);
 191         put_unaligned_be64(wwnn, b2);
 192         return snprintf(buf, len,
 193                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x,"
 194                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 195                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],
 196                 b2[0], b2[1], b2[2], b2[3], b2[4], b2[5], b2[6], b2[7]);
 197 }
 198
 199 static char *tcm_qla2xxx_npiv_get_fabric_name(void)
 200 {
 201         return "qla2xxx_npiv";
 202 }
 203
 204 static u8 tcm_qla2xxx_get_fabric_proto_ident(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         struct tcm_qla2xxx_lport *lport = tpg->lport;
 209         u8 proto_id;
 210
 211         switch (lport->lport_proto_id) {
 212         case SCSI_PROTOCOL_FCP:
 213         default:
 214                 proto_id = fc_get_fabric_proto_ident(se_tpg);
 215                 break;
 216         }
 217
 218         return proto_id;
 219 }
 220
 221 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
 222 {
 223         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 224                                 struct tcm_qla2xxx_tpg, se_tpg);
 225         struct tcm_qla2xxx_lport *lport = tpg->lport;
 226
 227         return lport->lport_naa_name;
 228 }
 229
 230 static char *tcm_qla2xxx_npiv_get_fabric_wwn(struct se_portal_group *se_tpg)
 231 {
 232         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 233                                 struct tcm_qla2xxx_tpg, se_tpg);
 234         struct tcm_qla2xxx_lport *lport = tpg->lport;
 235
 236         return &lport->lport_npiv_name[0];
 237 }
 238
 239 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg)
 240 {
 241         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 242                                 struct tcm_qla2xxx_tpg, se_tpg);
 243         return tpg->lport_tpgt;
 244 }
 245
 246 static u32 tcm_qla2xxx_get_default_depth(struct se_portal_group *se_tpg)
 247 {
 248         return 1;
 249 }
 250
 251 static u32 tcm_qla2xxx_get_pr_transport_id(
 252         struct se_portal_group *se_tpg,
 253         struct se_node_acl *se_nacl,
 254         struct t10_pr_registration *pr_reg,
 255         int *format_code,
 256         unsigned char *buf)
 257 {
 258         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 259                                 struct tcm_qla2xxx_tpg, se_tpg);
 260         struct tcm_qla2xxx_lport *lport = tpg->lport;
 261         int ret = 0;
 262
 263         switch (lport->lport_proto_id) {
 264         case SCSI_PROTOCOL_FCP:
 265         default:
 266                 ret = fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
 267                                         format_code, buf);
 268                 break;
 269         }
 270
 271         return ret;
 272 }
 273
 274 static u32 tcm_qla2xxx_get_pr_transport_id_len(
 275         struct se_portal_group *se_tpg,
 276         struct se_node_acl *se_nacl,
 277         struct t10_pr_registration *pr_reg,
 278         int *format_code)
 279 {
 280         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 281                                 struct tcm_qla2xxx_tpg, se_tpg);
 282         struct tcm_qla2xxx_lport *lport = tpg->lport;
 283         int ret = 0;
 284
 285         switch (lport->lport_proto_id) {
 286         case SCSI_PROTOCOL_FCP:
 287         default:
 288                 ret = fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
 289                                         format_code);
 290                 break;
 291         }
 292
 293         return ret;
 294 }
 295
 296 static char *tcm_qla2xxx_parse_pr_out_transport_id(
 297         struct se_portal_group *se_tpg,
 298         const char *buf,
 299         u32 *out_tid_len,
 300         char **port_nexus_ptr)
 301 {
 302         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 303                                 struct tcm_qla2xxx_tpg, se_tpg);
 304         struct tcm_qla2xxx_lport *lport = tpg->lport;
 305         char *tid = NULL;
 306
 307         switch (lport->lport_proto_id) {
 308         case SCSI_PROTOCOL_FCP:
 309         default:
 310                 tid = fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
 311                                         port_nexus_ptr);
 312                 break;
 313         }
 314
 315         return tid;
 316 }
 317
 318 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
 319 {
 320         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 321                                 struct tcm_qla2xxx_tpg, se_tpg);
 322
 323         return tpg->tpg_attrib.generate_node_acls;
 324 }
 325
 326 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
 327 {
 328         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 329                                 struct tcm_qla2xxx_tpg, se_tpg);
 330
 331         return tpg->tpg_attrib.cache_dynamic_acls;
 332 }
 333
 334 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
 335 {
 336         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 337                                 struct tcm_qla2xxx_tpg, se_tpg);
 338
 339         return tpg->tpg_attrib.demo_mode_write_protect;
 340 }
 341
 342 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
 343 {
 344         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 345                                 struct tcm_qla2xxx_tpg, se_tpg);
 346
 347         return tpg->tpg_attrib.prod_mode_write_protect;
 348 }
 349
 350 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg)
 351 {
 352         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 353                                 struct tcm_qla2xxx_tpg, se_tpg);
 354
 355         return tpg->tpg_attrib.demo_mode_login_only;
 356 }
 357
 358 static struct se_node_acl *tcm_qla2xxx_alloc_fabric_acl(
 359         struct se_portal_group *se_tpg)
 360 {
 361         struct tcm_qla2xxx_nacl *nacl;
 362
 363         nacl = kzalloc(sizeof(struct tcm_qla2xxx_nacl), GFP_KERNEL);
 364         if (!nacl) {
 365                 pr_err("Unable to allocate struct tcm_qla2xxx_nacl\n");
 366                 return NULL;
 367         }
 368
 369         return &nacl->se_node_acl;
 370 }
 371
 372 static void tcm_qla2xxx_release_fabric_acl(
 373         struct se_portal_group *se_tpg,
 374         struct se_node_acl *se_nacl)
 375 {
 376         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 377                         struct tcm_qla2xxx_nacl, se_node_acl);
 378         kfree(nacl);
 379 }
 380
 381 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
 382 {
 383         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 384                                 struct tcm_qla2xxx_tpg, se_tpg);
 385
 386         return tpg->lport_tpgt;
 387 }
 388
 389 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
 390 {
 391         struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
 392                         struct qla_tgt_mgmt_cmd, free_work);
 393
 394         transport_generic_free_cmd(&mcmd->se_cmd, 0);
 395 }
 396
 397 /*
 398  * Called from qla_target_template->free_mcmd(), and will call
 399  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 400  * release callback.  qla_hw_data->hardware_lock is expected to be held
 401  */
 402 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
 403 {
 404         INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
 405         queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
 406 }
 407
 408 static void tcm_qla2xxx_complete_free(struct work_struct *work)
 409 {
 410         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 411
 412         transport_generic_free_cmd(&cmd->se_cmd, 0);
 413 }
 414
 415 /*
 416  * Called from qla_target_template->free_cmd(), and will call
 417  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 418  * release callback.  qla_hw_data->hardware_lock is expected to be held
 419  */
 420 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 421 {
 422         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 423         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 424 }
 425
 426 /*
 427  * Called from struct target_core_fabric_ops->check_stop_free() context
 428  */
 429 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 430 {
 431         return target_put_sess_cmd(se_cmd->se_sess, se_cmd);
 432 }
 433
 434 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 435  * fabric descriptor @se_cmd command to release
 436  */
 437 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 438 {
 439         struct qla_tgt_cmd *cmd;
 440
 441         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 442                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 443                                 struct qla_tgt_mgmt_cmd, se_cmd);
 444                 qlt_free_mcmd(mcmd);
 445                 return;
 446         }
 447
 448         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 449         qlt_free_cmd(cmd);
 450 }
 451
 452 static int tcm_qla2xxx_shutdown_session(struct se_session *se_sess)
 453 {
 454         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 455         struct scsi_qla_host *vha;
 456         unsigned long flags;
 457
 458         BUG_ON(!sess);
 459         vha = sess->vha;
 460
 461         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
 462         target_sess_cmd_list_set_waiting(se_sess);
 463         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
 464
 465         return 1;
 466 }
 467
 468 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 469 {
 470         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 471         struct scsi_qla_host *vha;
 472         unsigned long flags;
 473
 474         BUG_ON(!sess);
 475         vha = sess->vha;
 476
 477         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
 478         qlt_unreg_sess(sess);
 479         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
 480 }
 481
 482 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 483 {
 484         return 0;
 485 }
 486
 487 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 488 {
 489         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 490                                 struct qla_tgt_cmd, se_cmd);
 491
 492         cmd->bufflen = se_cmd->data_length;
 493         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 494
 495         cmd->sg_cnt = se_cmd->t_data_nents;
 496         cmd->sg = se_cmd->t_data_sg;
 497
 498         /*
 499          * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
 500          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 501          */
 502         return qlt_rdy_to_xfer(cmd);
 503 }
 504
 505 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
 506 {
 507         unsigned long flags;
 508         /*
 509          * Check for WRITE_PENDING status to determine if we need to wait for
 510          * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
 511          */
 512         spin_lock_irqsave(&se_cmd->t_state_lock, flags);
 513         if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
 514             se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
 515                 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 516                 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
 517                                                 3000);
 518                 return 0;
 519         }
 520         spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 521
 522         return 0;
 523 }
 524
 525 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 526 {
 527         return;
 528 }
 529
 530 static u32 tcm_qla2xxx_get_task_tag(struct se_cmd *se_cmd)
 531 {
 532         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 533                                 struct qla_tgt_cmd, se_cmd);
 534
 535         return cmd->tag;
 536 }
 537
 538 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 539 {
 540         return 0;
 541 }
 542
 543 /*
 544  * Called from process context in qla_target.c:qlt_do_work() code
 545  */
 546 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 547         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 548         int data_dir, int bidi)
 549 {
 550         struct se_cmd *se_cmd = &cmd->se_cmd;
 551         struct se_session *se_sess;
 552         struct qla_tgt_sess *sess;
 553         int flags = TARGET_SCF_ACK_KREF;
 554
 555         if (bidi)
 556                 flags |= TARGET_SCF_BIDI_OP;
 557
 558         sess = cmd->sess;
 559         if (!sess) {
 560                 pr_err("Unable to locate struct qla_tgt_sess from qla_tgt_cmd\n");
 561                 return -EINVAL;
 562         }
 563
 564         se_sess = sess->se_sess;
 565         if (!se_sess) {
 566                 pr_err("Unable to locate active struct se_session\n");
 567                 return -EINVAL;
 568         }
 569
 570         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 571                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 572                                 data_dir, flags);
 573 }
 574
 575 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 576 {
 577         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 578
 579         /*
 580          * Ensure that the complete FCP WRITE payload has been received.
 581          * Otherwise return an exception via CHECK_CONDITION status.
 582          */
 583         if (!cmd->write_data_transferred) {
 584                 /*
 585                  * Check if se_cmd has already been aborted via LUN_RESET, and
 586                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
 587                  */
 588                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
 589                         complete(&cmd->se_cmd.t_transport_stop_comp);
 590                         return;
 591                 }
 592
 593                 transport_generic_request_failure(&cmd->se_cmd,
 594                                                   TCM_CHECK_CONDITION_ABORT_CMD);
 595                 return;
 596         }
 597
 598         return target_execute_cmd(&cmd->se_cmd);
 599 }
 600
 601 /*
 602  * Called from qla_target.c:qlt_do_ctio_completion()
 603  */
 604 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 605 {
 606         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 607         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 608 }
 609
 610 /*
 611  * Called from qla_target.c:qlt_issue_task_mgmt()
 612  */
 613 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
 614         uint8_t tmr_func, uint32_t tag)
 615 {
 616         struct qla_tgt_sess *sess = mcmd->sess;
 617         struct se_cmd *se_cmd = &mcmd->se_cmd;
 618
 619         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 620                         tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
 621 }
 622
 623 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 624 {
 625         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 626                                 struct qla_tgt_cmd, se_cmd);
 627
 628         cmd->bufflen = se_cmd->data_length;
 629         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 630         cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);
 631
 632         cmd->sg_cnt = se_cmd->t_data_nents;
 633         cmd->sg = se_cmd->t_data_sg;
 634         cmd->offset = 0;
 635
 636         /*
 637          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 638          */
 639         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 640                                 se_cmd->scsi_status);
 641 }
 642
 643 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 644 {
 645         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 646                                 struct qla_tgt_cmd, se_cmd);
 647         int xmit_type = QLA_TGT_XMIT_STATUS;
 648
 649         cmd->bufflen = se_cmd->data_length;
 650         cmd->sg = NULL;
 651         cmd->sg_cnt = 0;
 652         cmd->offset = 0;
 653         cmd->dma_data_direction = target_reverse_dma_direction(se_cmd);
 654         cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);
 655
 656         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 657                 /*
 658                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 659                  * for qla_tgt_xmit_response LLD code
 660                  */
 661                 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) {
 662                         se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT;
 663                         se_cmd->residual_count = 0;
 664                 }
 665                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 666                 se_cmd->residual_count += se_cmd->data_length;
 667
 668                 cmd->bufflen = 0;
 669         }
 670         /*
 671          * Now queue status response to qla2xxx LLD code and response ring
 672          */
 673         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 674 }
 675
 676 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 677 {
 678         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 679         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 680                                 struct qla_tgt_mgmt_cmd, se_cmd);
 681
 682         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 683                         mcmd, se_tmr->function, se_tmr->response);
 684         /*
 685          * Do translation between TCM TM response codes and
 686          * QLA2xxx FC TM response codes.
 687          */
 688         switch (se_tmr->response) {
 689         case TMR_FUNCTION_COMPLETE:
 690                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 691                 break;
 692         case TMR_TASK_DOES_NOT_EXIST:
 693                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 694                 break;
 695         case TMR_FUNCTION_REJECTED:
 696                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 697                 break;
 698         case TMR_LUN_DOES_NOT_EXIST:
 699         default:
 700                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 701                 break;
 702         }
 703         /*
 704          * Queue the TM response to QLA2xxx LLD to build a
 705          * CTIO response packet.
 706          */
 707         qlt_xmit_tm_rsp(mcmd);
 708 }
 709
 710 /* Local pointer to allocated TCM configfs fabric module */
 711 struct target_fabric_configfs *tcm_qla2xxx_fabric_configfs;
 712 struct target_fabric_configfs *tcm_qla2xxx_npiv_fabric_configfs;
 713
 714 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 715                         struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *);
 716 /*
 717  * Expected to be called with struct qla_hw_data->hardware_lock held
 718  */
 719 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
 720 {
 721         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 722         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 723         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 724         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 725                                 struct tcm_qla2xxx_lport, lport_wwn);
 726         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 727                                 struct tcm_qla2xxx_nacl, se_node_acl);
 728         void *node;
 729
 730         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 731
 732         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 733         WARN_ON(node && (node != se_nacl));
 734
 735         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 736             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 737         /*
 738          * Now clear the se_nacl and session pointers from our HW lport lookup
 739          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 740          *
 741          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 742          * target_wait_for_sess_cmds() before the session waits for outstanding
 743          * I/O to complete, to avoid a race between session shutdown execution
 744          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 745          */
 746         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 747 }
 748
 749 static void tcm_qla2xxx_release_session(struct kref *kref)
 750 {
 751         struct se_session *se_sess = container_of(kref,
 752                         struct se_session, sess_kref);
 753
 754         qlt_unreg_sess(se_sess->fabric_sess_ptr);
 755 }
 756
 757 static void tcm_qla2xxx_put_session(struct se_session *se_sess)
 758 {
 759         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 760         struct qla_hw_data *ha = sess->vha->hw;
 761         unsigned long flags;
 762
 763         spin_lock_irqsave(&ha->hardware_lock, flags);
 764         kref_put(&se_sess->sess_kref, tcm_qla2xxx_release_session);
 765         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 766 }
 767
 768 static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess)
 769 {
 770         if (!sess)
 771                 return;
 772
 773         assert_spin_locked(&sess->vha->hw->hardware_lock);
 774         kref_put(&sess->se_sess->sess_kref, tcm_qla2xxx_release_session);
 775 }
 776
 777 static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess)
 778 {
 779         assert_spin_locked(&sess->vha->hw->hardware_lock);
 780         target_sess_cmd_list_set_waiting(sess->se_sess);
 781 }
 782
 783 static struct se_node_acl *tcm_qla2xxx_make_nodeacl(
 784         struct se_portal_group *se_tpg,
 785         struct config_group *group,
 786         const char *name)
 787 {
 788         struct se_node_acl *se_nacl, *se_nacl_new;
 789         struct tcm_qla2xxx_nacl *nacl;
 790         u64 wwnn;
 791         u32 qla2xxx_nexus_depth;
 792
 793         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 794                 return ERR_PTR(-EINVAL);
 795
 796         se_nacl_new = tcm_qla2xxx_alloc_fabric_acl(se_tpg);
 797         if (!se_nacl_new)
 798                 return ERR_PTR(-ENOMEM);
 799 /* #warning FIXME: Hardcoded qla2xxx_nexus depth in tcm_qla2xxx_make_nodeacl */
 800         qla2xxx_nexus_depth = 1;
 801
 802         /*
 803          * se_nacl_new may be released by core_tpg_add_initiator_node_acl()
 804          * when converting a NodeACL from demo mode -> explict
 805          */
 806         se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
 807                                 name, qla2xxx_nexus_depth);
 808         if (IS_ERR(se_nacl)) {
 809                 tcm_qla2xxx_release_fabric_acl(se_tpg, se_nacl_new);
 810                 return se_nacl;
 811         }
 812         /*
 813          * Locate our struct tcm_qla2xxx_nacl and set the FC Nport WWPN
 814          */
 815         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 816         nacl->nport_wwnn = wwnn;
 817         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 818
 819         return se_nacl;
 820 }
 821
 822 static void tcm_qla2xxx_drop_nodeacl(struct se_node_acl *se_acl)
 823 {
 824         struct se_portal_group *se_tpg = se_acl->se_tpg;
 825         struct tcm_qla2xxx_nacl *nacl = container_of(se_acl,
 826                                 struct tcm_qla2xxx_nacl, se_node_acl);
 827
 828         core_tpg_del_initiator_node_acl(se_tpg, se_acl, 1);
 829         kfree(nacl);
 830 }
 831
 832 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 833
 834 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 835                                                                         \
 836 static ssize_t tcm_qla2xxx_tpg_attrib_show_##name(                      \
 837         struct se_portal_group *se_tpg,                                 \
 838         char *page)                                                     \
 839 {                                                                       \
 840         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 841                         struct tcm_qla2xxx_tpg, se_tpg);                \
 842                                                                         \
 843         return sprintf(page, "%u\n", tpg->tpg_attrib.name);     \
 844 }                                                                       \
 845                                                                         \
 846 static ssize_t tcm_qla2xxx_tpg_attrib_store_##name(                     \
 847         struct se_portal_group *se_tpg,                                 \
 848         const char *page,                                               \
 849         size_t count)                                                   \
 850 {                                                                       \
 851         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 852                         struct tcm_qla2xxx_tpg, se_tpg);                \
 853         unsigned long val;                                              \
 854         int ret;                                                        \
 855                                                                         \
 856         ret = kstrtoul(page, 0, &val);                                  \
 857         if (ret < 0) {                                                  \
 858                 pr_err("kstrtoul() failed with"                         \
 859                                 " ret: %d\n", ret);                     \
 860                 return -EINVAL;                                         \
 861         }                                                               \
 862         ret = tcm_qla2xxx_set_attrib_##name(tpg, val);                  \
 863                                                                         \
 864         return (!ret) ? count : -EINVAL;                                \
 865 }
 866
 867 #define DEF_QLA_TPG_ATTR_BOOL(_name)                                    \
 868                                                                         \
 869 static int tcm_qla2xxx_set_attrib_##_name(                              \
 870         struct tcm_qla2xxx_tpg *tpg,                                    \
 871         unsigned long val)                                              \
 872 {                                                                       \
 873         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 874                                                                         \
 875         if ((val != 0) && (val != 1)) {                                 \
 876                 pr_err("Illegal boolean value %lu\n", val);             \
 877                 return -EINVAL;                                         \
 878         }                                                               \
 879                                                                         \
 880         a->_name = val;                                                 \
 881         return 0;                                                       \
 882 }
 883
 884 #define QLA_TPG_ATTR(_name, _mode) \
 885         TF_TPG_ATTRIB_ATTR(tcm_qla2xxx, _name, _mode);
 886
 887 /*
 888  * Define tcm_qla2xxx_tpg_attrib_s_generate_node_acls
 889  */
 890 DEF_QLA_TPG_ATTR_BOOL(generate_node_acls);
 891 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 892 QLA_TPG_ATTR(generate_node_acls, S_IRUGO | S_IWUSR);
 893
 894 /*
 895  Define tcm_qla2xxx_attrib_s_cache_dynamic_acls
 896  */
 897 DEF_QLA_TPG_ATTR_BOOL(cache_dynamic_acls);
 898 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 899 QLA_TPG_ATTR(cache_dynamic_acls, S_IRUGO | S_IWUSR);
 900
 901 /*
 902  * Define tcm_qla2xxx_tpg_attrib_s_demo_mode_write_protect
 903  */
 904 DEF_QLA_TPG_ATTR_BOOL(demo_mode_write_protect);
 905 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 906 QLA_TPG_ATTR(demo_mode_write_protect, S_IRUGO | S_IWUSR);
 907
 908 /*
 909  * Define tcm_qla2xxx_tpg_attrib_s_prod_mode_write_protect
 910  */
 911 DEF_QLA_TPG_ATTR_BOOL(prod_mode_write_protect);
 912 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 913 QLA_TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);
 914
 915 /*
 916  * Define tcm_qla2xxx_tpg_attrib_s_demo_mode_login_only
 917  */
 918 DEF_QLA_TPG_ATTR_BOOL(demo_mode_login_only);
 919 DEF_QLA_TPG_ATTRIB(demo_mode_login_only);
 920 QLA_TPG_ATTR(demo_mode_login_only, S_IRUGO | S_IWUSR);
 921
 922 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 923         &tcm_qla2xxx_tpg_attrib_generate_node_acls.attr,
 924         &tcm_qla2xxx_tpg_attrib_cache_dynamic_acls.attr,
 925         &tcm_qla2xxx_tpg_attrib_demo_mode_write_protect.attr,
 926         &tcm_qla2xxx_tpg_attrib_prod_mode_write_protect.attr,
 927         &tcm_qla2xxx_tpg_attrib_demo_mode_login_only.attr,
 928         NULL,
 929 };
 930
 931 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 932
 933 static ssize_t tcm_qla2xxx_tpg_show_enable(
 934         struct se_portal_group *se_tpg,
 935         char *page)
 936 {
 937         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 938                         struct tcm_qla2xxx_tpg, se_tpg);
 939
 940         return snprintf(page, PAGE_SIZE, "%d\n",
 941                         atomic_read(&tpg->lport_tpg_enabled));
 942 }
 943
 944 static ssize_t tcm_qla2xxx_tpg_store_enable(
 945         struct se_portal_group *se_tpg,
 946         const char *page,
 947         size_t count)
 948 {
 949         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 950         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 951                         struct tcm_qla2xxx_lport, lport_wwn);
 952         struct scsi_qla_host *vha = lport->qla_vha;
 953         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 954                         struct tcm_qla2xxx_tpg, se_tpg);
 955         unsigned long op;
 956         int rc;
 957
 958         rc = kstrtoul(page, 0, &op);
 959         if (rc < 0) {
 960                 pr_err("kstrtoul() returned %d\n", rc);
 961                 return -EINVAL;
 962         }
 963         if ((op != 1) && (op != 0)) {
 964                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 965                 return -EINVAL;
 966         }
 967
 968         if (op) {
 969                 atomic_set(&tpg->lport_tpg_enabled, 1);
 970                 qlt_enable_vha(vha);
 971         } else {
 972                 if (!vha->vha_tgt.qla_tgt) {
 973                         pr_err("struct qla_hw_data *vha->vha_tgt.qla_tgt is NULL\n");
 974                         return -ENODEV;
 975                 }
 976                 atomic_set(&tpg->lport_tpg_enabled, 0);
 977                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
 978         }
 979
 980         return count;
 981 }
 982
 983 TF_TPG_BASE_ATTR(tcm_qla2xxx, enable, S_IRUGO | S_IWUSR);
 984
 985 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
 986         &tcm_qla2xxx_tpg_enable.attr,
 987         NULL,
 988 };
 989
 990 static struct se_portal_group *tcm_qla2xxx_make_tpg(
 991         struct se_wwn *wwn,
 992         struct config_group *group,
 993         const char *name)
 994 {
 995         struct tcm_qla2xxx_lport *lport = container_of(wwn,
 996                         struct tcm_qla2xxx_lport, lport_wwn);
 997         struct tcm_qla2xxx_tpg *tpg;
 998         unsigned long tpgt;
 999         int ret;
1000
1001         if (strstr(name, "tpgt_") != name)
1002                 return ERR_PTR(-EINVAL);
1003         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1004                 return ERR_PTR(-EINVAL);
1005
1006         if ((tpgt != 1)) {
1007                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1008                 return ERR_PTR(-ENOSYS);
1009         }
1010
1011         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1012         if (!tpg) {
1013                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1014                 return ERR_PTR(-ENOMEM);
1015         }
1016         tpg->lport = lport;
1017         tpg->lport_tpgt = tpgt;
1018         /*
1019          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1020          * NodeACLs
1021          */
1022         tpg->tpg_attrib.generate_node_acls = 1;
1023         tpg->tpg_attrib.demo_mode_write_protect = 1;
1024         tpg->tpg_attrib.cache_dynamic_acls = 1;
1025         tpg->tpg_attrib.demo_mode_login_only = 1;
1026
1027         ret = core_tpg_register(&tcm_qla2xxx_fabric_configfs->tf_ops, wwn,
1028                                 &tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
1029         if (ret < 0) {
1030                 kfree(tpg);
1031                 return NULL;
1032         }
1033
1034         lport->tpg_1 = tpg;
1035
1036         return &tpg->se_tpg;
1037 }
1038
1039 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1040 {
1041         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1042                         struct tcm_qla2xxx_tpg, se_tpg);
1043         struct tcm_qla2xxx_lport *lport = tpg->lport;
1044         struct scsi_qla_host *vha = lport->qla_vha;
1045         /*
1046          * Call into qla2x_target.c LLD logic to shutdown the active
1047          * FC Nexuses and disable target mode operation for this qla_hw_data
1048          */
1049         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop)
1050                 qlt_stop_phase1(vha->vha_tgt.qla_tgt);
1051
1052         core_tpg_deregister(se_tpg);
1053         /*
1054          * Clear local TPG=1 pointer for non NPIV mode.
1055          */
1056                 lport->tpg_1 = NULL;
1057
1058         kfree(tpg);
1059 }
1060
1061 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1062         struct se_wwn *wwn,
1063         struct config_group *group,
1064         const char *name)
1065 {
1066         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1067                         struct tcm_qla2xxx_lport, lport_wwn);
1068         struct tcm_qla2xxx_tpg *tpg;
1069         unsigned long tpgt;
1070         int ret;
1071
1072         if (strstr(name, "tpgt_") != name)
1073                 return ERR_PTR(-EINVAL);
1074         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1075                 return ERR_PTR(-EINVAL);
1076
1077         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1078         if (!tpg) {
1079                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1080                 return ERR_PTR(-ENOMEM);
1081         }
1082         tpg->lport = lport;
1083         tpg->lport_tpgt = tpgt;
1084
1085         /*
1086          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1087          * NodeACLs
1088          */
1089         tpg->tpg_attrib.generate_node_acls = 1;
1090         tpg->tpg_attrib.demo_mode_write_protect = 1;
1091         tpg->tpg_attrib.cache_dynamic_acls = 1;
1092         tpg->tpg_attrib.demo_mode_login_only = 1;
1093
1094         ret = core_tpg_register(&tcm_qla2xxx_npiv_fabric_configfs->tf_ops, wwn,
1095                                 &tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
1096         if (ret < 0) {
1097                 kfree(tpg);
1098                 return NULL;
1099         }
1100         lport->tpg_1 = tpg;
1101         return &tpg->se_tpg;
1102 }
1103
1104 /*
1105  * Expected to be called with struct qla_hw_data->hardware_lock held
1106  */
1107 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_s_id(
1108         scsi_qla_host_t *vha,
1109         const uint8_t *s_id)
1110 {
1111         struct tcm_qla2xxx_lport *lport;
1112         struct se_node_acl *se_nacl;
1113         struct tcm_qla2xxx_nacl *nacl;
1114         u32 key;
1115
1116         lport = vha->vha_tgt.target_lport_ptr;
1117         if (!lport) {
1118                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1119                 dump_stack();
1120                 return NULL;
1121         }
1122
1123         key = (((unsigned long)s_id[0] << 16) |
1124                ((unsigned long)s_id[1] << 8) |
1125                (unsigned long)s_id[2]);
1126         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1127
1128         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1129         if (!se_nacl) {
1130                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1131                 return NULL;
1132         }
1133         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1134             se_nacl, se_nacl->initiatorname);
1135
1136         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1137         if (!nacl->qla_tgt_sess) {
1138                 pr_err("Unable to locate struct qla_tgt_sess\n");
1139                 return NULL;
1140         }
1141
1142         return nacl->qla_tgt_sess;
1143 }
1144
1145 /*
1146  * Expected to be called with struct qla_hw_data->hardware_lock held
1147  */
1148 static void tcm_qla2xxx_set_sess_by_s_id(
1149         struct tcm_qla2xxx_lport *lport,
1150         struct se_node_acl *new_se_nacl,
1151         struct tcm_qla2xxx_nacl *nacl,
1152         struct se_session *se_sess,
1153         struct qla_tgt_sess *qla_tgt_sess,
1154         uint8_t *s_id)
1155 {
1156         u32 key;
1157         void *slot;
1158         int rc;
1159
1160         key = (((unsigned long)s_id[0] << 16) |
1161                ((unsigned long)s_id[1] << 8) |
1162                (unsigned long)s_id[2]);
1163         pr_debug("set_sess_by_s_id: %06x\n", key);
1164
1165         slot = btree_lookup32(&lport->lport_fcport_map, key);
1166         if (!slot) {
1167                 if (new_se_nacl) {
1168                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1169                         nacl->nport_id = key;
1170                         rc = btree_insert32(&lport->lport_fcport_map, key,
1171                                         new_se_nacl, GFP_ATOMIC);
1172                         if (rc)
1173                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1174                                     (int)key);
1175                 } else {
1176                         pr_debug("Wiping nonexisting fc_port entry\n");
1177                 }
1178
1179                 qla_tgt_sess->se_sess = se_sess;
1180                 nacl->qla_tgt_sess = qla_tgt_sess;
1181                 return;
1182         }
1183
1184         if (nacl->qla_tgt_sess) {
1185                 if (new_se_nacl == NULL) {
1186                         pr_debug("Clearing existing nacl->qla_tgt_sess and fc_port entry\n");
1187                         btree_remove32(&lport->lport_fcport_map, key);
1188                         nacl->qla_tgt_sess = NULL;
1189                         return;
1190                 }
1191                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_port entry\n");
1192                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1193                 qla_tgt_sess->se_sess = se_sess;
1194                 nacl->qla_tgt_sess = qla_tgt_sess;
1195                 return;
1196         }
1197
1198         if (new_se_nacl == NULL) {
1199                 pr_debug("Clearing existing fc_port entry\n");
1200                 btree_remove32(&lport->lport_fcport_map, key);
1201                 return;
1202         }
1203
1204         pr_debug("Replacing existing fc_port entry w/o active nacl->qla_tgt_sess\n");
1205         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1206         qla_tgt_sess->se_sess = se_sess;
1207         nacl->qla_tgt_sess = qla_tgt_sess;
1208
1209         pr_debug("Setup nacl->qla_tgt_sess %p by s_id for se_nacl: %p, initiatorname: %s\n",
1210             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1211 }
1212
1213 /*
1214  * Expected to be called with struct qla_hw_data->hardware_lock held
1215  */
1216 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_loop_id(
1217         scsi_qla_host_t *vha,
1218         const uint16_t loop_id)
1219 {
1220         struct tcm_qla2xxx_lport *lport;
1221         struct se_node_acl *se_nacl;
1222         struct tcm_qla2xxx_nacl *nacl;
1223         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1224
1225         lport = vha->vha_tgt.target_lport_ptr;
1226         if (!lport) {
1227                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1228                 dump_stack();
1229                 return NULL;
1230         }
1231
1232         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1233
1234         fc_loopid = lport->lport_loopid_map + loop_id;
1235         se_nacl = fc_loopid->se_nacl;
1236         if (!se_nacl) {
1237                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1238                     loop_id);
1239                 return NULL;
1240         }
1241
1242         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1243
1244         if (!nacl->qla_tgt_sess) {
1245                 pr_err("Unable to locate struct qla_tgt_sess\n");
1246                 return NULL;
1247         }
1248
1249         return nacl->qla_tgt_sess;
1250 }
1251
1252 /*
1253  * Expected to be called with struct qla_hw_data->hardware_lock held
1254  */
1255 static void tcm_qla2xxx_set_sess_by_loop_id(
1256         struct tcm_qla2xxx_lport *lport,
1257         struct se_node_acl *new_se_nacl,
1258         struct tcm_qla2xxx_nacl *nacl,
1259         struct se_session *se_sess,
1260         struct qla_tgt_sess *qla_tgt_sess,
1261         uint16_t loop_id)
1262 {
1263         struct se_node_acl *saved_nacl;
1264         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1265
1266         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1267
1268         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1269                         lport->lport_loopid_map)[loop_id];
1270
1271         saved_nacl = fc_loopid->se_nacl;
1272         if (!saved_nacl) {
1273                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1274                 fc_loopid->se_nacl = new_se_nacl;
1275                 if (qla_tgt_sess->se_sess != se_sess)
1276                         qla_tgt_sess->se_sess = se_sess;
1277                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1278                         nacl->qla_tgt_sess = qla_tgt_sess;
1279                 return;
1280         }
1281
1282         if (nacl->qla_tgt_sess) {
1283                 if (new_se_nacl == NULL) {
1284                         pr_debug("Clearing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1285                         fc_loopid->se_nacl = NULL;
1286                         nacl->qla_tgt_sess = NULL;
1287                         return;
1288                 }
1289
1290                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1291                 fc_loopid->se_nacl = new_se_nacl;
1292                 if (qla_tgt_sess->se_sess != se_sess)
1293                         qla_tgt_sess->se_sess = se_sess;
1294                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1295                         nacl->qla_tgt_sess = qla_tgt_sess;
1296                 return;
1297         }
1298
1299         if (new_se_nacl == NULL) {
1300                 pr_debug("Clearing fc_loopid->se_nacl\n");
1301                 fc_loopid->se_nacl = NULL;
1302                 return;
1303         }
1304
1305         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->qla_tgt_sess\n");
1306         fc_loopid->se_nacl = new_se_nacl;
1307         if (qla_tgt_sess->se_sess != se_sess)
1308                 qla_tgt_sess->se_sess = se_sess;
1309         if (nacl->qla_tgt_sess != qla_tgt_sess)
1310                 nacl->qla_tgt_sess = qla_tgt_sess;
1311
1312         pr_debug("Setup nacl->qla_tgt_sess %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1313             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1314 }
1315
1316 /*
1317  * Should always be called with qla_hw_data->hardware_lock held.
1318  */
1319 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1320                 struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess)
1321 {
1322         struct se_session *se_sess = sess->se_sess;
1323         unsigned char be_sid[3];
1324
1325         be_sid[0] = sess->s_id.b.domain;
1326         be_sid[1] = sess->s_id.b.area;
1327         be_sid[2] = sess->s_id.b.al_pa;
1328
1329         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1330                                 sess, be_sid);
1331         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1332                                 sess, sess->loop_id);
1333 }
1334
1335 static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
1336 {
1337         struct qla_tgt *tgt = sess->tgt;
1338         struct qla_hw_data *ha = tgt->ha;
1339         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1340         struct se_session *se_sess;
1341         struct se_node_acl *se_nacl;
1342         struct tcm_qla2xxx_lport *lport;
1343         struct tcm_qla2xxx_nacl *nacl;
1344
1345         BUG_ON(in_interrupt());
1346
1347         se_sess = sess->se_sess;
1348         if (!se_sess) {
1349                 pr_err("struct qla_tgt_sess->se_sess is NULL\n");
1350                 dump_stack();
1351                 return;
1352         }
1353         se_nacl = se_sess->se_node_acl;
1354         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1355
1356         lport = vha->vha_tgt.target_lport_ptr;
1357         if (!lport) {
1358                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1359                 dump_stack();
1360                 return;
1361         }
1362         target_wait_for_sess_cmds(se_sess);
1363
1364         transport_deregister_session_configfs(sess->se_sess);
1365         transport_deregister_session(sess->se_sess);
1366 }
1367
1368 /*
1369  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1370  * to locate struct se_node_acl
1371  */
1372 static int tcm_qla2xxx_check_initiator_node_acl(
1373         scsi_qla_host_t *vha,
1374         unsigned char *fc_wwpn,
1375         void *qla_tgt_sess,
1376         uint8_t *s_id,
1377         uint16_t loop_id)
1378 {
1379         struct qla_hw_data *ha = vha->hw;
1380         struct tcm_qla2xxx_lport *lport;
1381         struct tcm_qla2xxx_tpg *tpg;
1382         struct tcm_qla2xxx_nacl *nacl;
1383         struct se_portal_group *se_tpg;
1384         struct se_node_acl *se_nacl;
1385         struct se_session *se_sess;
1386         struct qla_tgt_sess *sess = qla_tgt_sess;
1387         unsigned char port_name[36];
1388         unsigned long flags;
1389
1390         lport = vha->vha_tgt.target_lport_ptr;
1391         if (!lport) {
1392                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1393                 dump_stack();
1394                 return -EINVAL;
1395         }
1396         /*
1397          * Locate the TPG=1 reference..
1398          */
1399         tpg = lport->tpg_1;
1400         if (!tpg) {
1401                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1402                 return -EINVAL;
1403         }
1404         se_tpg = &tpg->se_tpg;
1405
1406         se_sess = transport_init_session();
1407         if (IS_ERR(se_sess)) {
1408                 pr_err("Unable to initialize struct se_session\n");
1409                 return PTR_ERR(se_sess);
1410         }
1411         /*
1412          * Format the FCP Initiator port_name into colon seperated values to
1413          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1414          */
1415         memset(&port_name, 0, 36);
1416         snprintf(port_name, 36, "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
1417                 fc_wwpn[0], fc_wwpn[1], fc_wwpn[2], fc_wwpn[3], fc_wwpn[4],
1418                 fc_wwpn[5], fc_wwpn[6], fc_wwpn[7]);
1419         /*
1420          * Locate our struct se_node_acl either from an explict NodeACL created
1421          * via ConfigFS, or via running in TPG demo mode.
1422          */
1423         se_sess->se_node_acl = core_tpg_check_initiator_node_acl(se_tpg,
1424                                         port_name);
1425         if (!se_sess->se_node_acl) {
1426                 transport_free_session(se_sess);
1427                 return -EINVAL;
1428         }
1429         se_nacl = se_sess->se_node_acl;
1430         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1431         /*
1432          * And now setup the new se_nacl and session pointers into our HW lport
1433          * mappings for fabric S_ID and LOOP_ID.
1434          */
1435         spin_lock_irqsave(&ha->hardware_lock, flags);
1436         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess,
1437                         qla_tgt_sess, s_id);
1438         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl, se_sess,
1439                         qla_tgt_sess, loop_id);
1440         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1441         /*
1442          * Finally register the new FC Nexus with TCM
1443          */
1444         __transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
1445
1446         return 0;
1447 }
1448
1449 static void tcm_qla2xxx_update_sess(struct qla_tgt_sess *sess, port_id_t s_id,
1450                                     uint16_t loop_id, bool conf_compl_supported)
1451 {
1452         struct qla_tgt *tgt = sess->tgt;
1453         struct qla_hw_data *ha = tgt->ha;
1454         scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev);
1455         struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr;
1456         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1457         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1458                         struct tcm_qla2xxx_nacl, se_node_acl);
1459         u32 key;
1460
1461
1462         if (sess->loop_id != loop_id || sess->s_id.b24 != s_id.b24)
1463                 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1464                     sess, sess->port_name,
1465                     sess->loop_id, loop_id, sess->s_id.b.domain,
1466                     sess->s_id.b.area, sess->s_id.b.al_pa, s_id.b.domain,
1467                     s_id.b.area, s_id.b.al_pa);
1468
1469         if (sess->loop_id != loop_id) {
1470                 /*
1471                  * Because we can shuffle loop IDs around and we
1472                  * update different sessions non-atomically, we might
1473                  * have overwritten this session's old loop ID
1474                  * already, and we might end up overwriting some other
1475                  * session that will be updated later.  So we have to
1476                  * be extra careful and we can't warn about those things...
1477                  */
1478                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1479                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1480
1481                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1482
1483                 sess->loop_id = loop_id;
1484         }
1485
1486         if (sess->s_id.b24 != s_id.b24) {
1487                 key = (((u32) sess->s_id.b.domain << 16) |
1488                        ((u32) sess->s_id.b.area   <<  8) |
1489                        ((u32) sess->s_id.b.al_pa));
1490
1491                 if (btree_lookup32(&lport->lport_fcport_map, key))
1492                         WARN(btree_remove32(&lport->lport_fcport_map, key) != se_nacl,
1493                              "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1494                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1495                 else
1496                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1497                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1498
1499                 key = (((u32) s_id.b.domain << 16) |
1500                        ((u32) s_id.b.area   <<  8) |
1501                        ((u32) s_id.b.al_pa));
1502
1503                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1504                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1505                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1506                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1507                 } else {
1508                         btree_insert32(&lport->lport_fcport_map, key, se_nacl, GFP_ATOMIC);
1509                 }
1510
1511                 sess->s_id = s_id;
1512                 nacl->nport_id = key;
1513         }
1514
1515         sess->conf_compl_supported = conf_compl_supported;
1516 }
1517
1518 /*
1519  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1520  */
1521 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1522         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1523         .handle_data            = tcm_qla2xxx_handle_data,
1524         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1525         .free_cmd               = tcm_qla2xxx_free_cmd,
1526         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1527         .free_session           = tcm_qla2xxx_free_session,
1528         .update_sess            = tcm_qla2xxx_update_sess,
1529         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1530         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1531         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1532         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1533         .put_sess               = tcm_qla2xxx_put_sess,
1534         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1535 };
1536
1537 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1538 {
1539         int rc;
1540
1541         rc = btree_init32(&lport->lport_fcport_map);
1542         if (rc) {
1543                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1544                 return rc;
1545         }
1546
1547         lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1548                                 65536);
1549         if (!lport->lport_loopid_map) {
1550                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1551                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1552                 btree_destroy32(&lport->lport_fcport_map);
1553                 return -ENOMEM;
1554         }
1555         memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1556                * 65536);
1557         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1558                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1559         return 0;
1560 }
1561
1562 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha,
1563                                          void *target_lport_ptr,
1564                                          u64 npiv_wwpn, u64 npiv_wwnn)
1565 {
1566         struct qla_hw_data *ha = vha->hw;
1567         struct tcm_qla2xxx_lport *lport =
1568                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1569         /*
1570          * Setup tgt_ops, local pointer to vha and target_lport_ptr
1571          */
1572         ha->tgt.tgt_ops = &tcm_qla2xxx_template;
1573         vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1574         lport->qla_vha = vha;
1575
1576         return 0;
1577 }
1578
1579 static struct se_wwn *tcm_qla2xxx_make_lport(
1580         struct target_fabric_configfs *tf,
1581         struct config_group *group,
1582         const char *name)
1583 {
1584         struct tcm_qla2xxx_lport *lport;
1585         u64 wwpn;
1586         int ret = -ENODEV;
1587
1588         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1589                 return ERR_PTR(-EINVAL);
1590
1591         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1592         if (!lport) {
1593                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1594                 return ERR_PTR(-ENOMEM);
1595         }
1596         lport->lport_wwpn = wwpn;
1597         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1598                                 wwpn);
1599         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1600
1601         ret = tcm_qla2xxx_init_lport(lport);
1602         if (ret != 0)
1603                 goto out;
1604
1605         ret = qlt_lport_register(lport, wwpn, 0, 0,
1606                                  tcm_qla2xxx_lport_register_cb);
1607         if (ret != 0)
1608                 goto out_lport;
1609
1610         return &lport->lport_wwn;
1611 out_lport:
1612         vfree(lport->lport_loopid_map);
1613         btree_destroy32(&lport->lport_fcport_map);
1614 out:
1615         kfree(lport);
1616         return ERR_PTR(ret);
1617 }
1618
1619 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1620 {
1621         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1622                         struct tcm_qla2xxx_lport, lport_wwn);
1623         struct scsi_qla_host *vha = lport->qla_vha;
1624         struct se_node_acl *node;
1625         u32 key = 0;
1626
1627         /*
1628          * Call into qla2x_target.c LLD logic to complete the
1629          * shutdown of struct qla_tgt after the call to
1630          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1631          */
1632         if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped)
1633                 qlt_stop_phase2(vha->vha_tgt.qla_tgt);
1634
1635         qlt_lport_deregister(vha);
1636
1637         vfree(lport->lport_loopid_map);
1638         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1639                 btree_remove32(&lport->lport_fcport_map, key);
1640         btree_destroy32(&lport->lport_fcport_map);
1641         kfree(lport);
1642 }
1643
1644 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha,
1645                                               void *target_lport_ptr,
1646                                               u64 npiv_wwpn, u64 npiv_wwnn)
1647 {
1648         struct fc_vport *vport;
1649         struct Scsi_Host *sh = base_vha->host;
1650         struct scsi_qla_host *npiv_vha;
1651         struct tcm_qla2xxx_lport *lport =
1652                         (struct tcm_qla2xxx_lport *)target_lport_ptr;
1653         struct fc_vport_identifiers vport_id;
1654
1655         if (!qla_tgt_mode_enabled(base_vha)) {
1656                 pr_err("qla2xxx base_vha not enabled for target mode\n");
1657                 return -EPERM;
1658         }
1659
1660         memset(&vport_id, 0, sizeof(vport_id));
1661         vport_id.port_name = npiv_wwpn;
1662         vport_id.node_name = npiv_wwnn;
1663         vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR;
1664         vport_id.vport_type = FC_PORTTYPE_NPIV;
1665         vport_id.disable = false;
1666
1667         vport = fc_vport_create(sh, 0, &vport_id);
1668         if (!vport) {
1669                 pr_err("fc_vport_create failed for qla2xxx_npiv\n");
1670                 return -ENODEV;
1671         }
1672         /*
1673          * Setup local pointer to NPIV vhba + target_lport_ptr
1674          */
1675         npiv_vha = (struct scsi_qla_host *)vport->dd_data;
1676         npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr;
1677         lport->qla_vha = npiv_vha;
1678
1679         scsi_host_get(npiv_vha->host);
1680         return 0;
1681 }
1682
1683
1684 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1685         struct target_fabric_configfs *tf,
1686         struct config_group *group,
1687         const char *name)
1688 {
1689         struct tcm_qla2xxx_lport *lport;
1690         u64 phys_wwpn, npiv_wwpn, npiv_wwnn;
1691         char *p, tmp[128];
1692         int ret;
1693
1694         snprintf(tmp, 128, "%s", name);
1695
1696         p = strchr(tmp, '@');
1697         if (!p) {
1698                 pr_err("Unable to locate NPIV '@' seperator\n");
1699                 return ERR_PTR(-EINVAL);
1700         }
1701         *p++ = '\0';
1702
1703         if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0)
1704                 return ERR_PTR(-EINVAL);
1705
1706         if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1,
1707                                        &npiv_wwpn, &npiv_wwnn) < 0)
1708                 return ERR_PTR(-EINVAL);
1709
1710         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1711         if (!lport) {
1712                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1713                 return ERR_PTR(-ENOMEM);
1714         }
1715         lport->lport_npiv_wwpn = npiv_wwpn;
1716         lport->lport_npiv_wwnn = npiv_wwnn;
1717         tcm_qla2xxx_npiv_format_wwn(&lport->lport_npiv_name[0],
1718                         TCM_QLA2XXX_NAMELEN, npiv_wwpn, npiv_wwnn);
1719         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1720
1721         ret = tcm_qla2xxx_init_lport(lport);
1722         if (ret != 0)
1723                 goto out;
1724
1725         ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn,
1726                                  tcm_qla2xxx_lport_register_npiv_cb);
1727         if (ret != 0)
1728                 goto out_lport;
1729
1730         return &lport->lport_wwn;
1731 out_lport:
1732         vfree(lport->lport_loopid_map);
1733         btree_destroy32(&lport->lport_fcport_map);
1734 out:
1735         kfree(lport);
1736         return ERR_PTR(ret);
1737 }
1738
1739 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1740 {
1741         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1742                         struct tcm_qla2xxx_lport, lport_wwn);
1743         struct scsi_qla_host *npiv_vha = lport->qla_vha;
1744         struct qla_hw_data *ha = npiv_vha->hw;
1745         scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
1746
1747         scsi_host_put(npiv_vha->host);
1748         /*
1749          * Notify libfc that we want to release the vha->fc_vport
1750          */
1751         fc_vport_terminate(npiv_vha->fc_vport);
1752         scsi_host_put(base_vha->host);
1753         kfree(lport);
1754 }
1755
1756
1757 static ssize_t tcm_qla2xxx_wwn_show_attr_version(
1758         struct target_fabric_configfs *tf,
1759         char *page)
1760 {
1761         return sprintf(page,
1762             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on "
1763             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1764             utsname()->machine);
1765 }
1766
1767 TF_WWN_ATTR_RO(tcm_qla2xxx, version);
1768
1769 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1770         &tcm_qla2xxx_wwn_version.attr,
1771         NULL,
1772 };
1773
1774 static struct target_core_fabric_ops tcm_qla2xxx_ops = {
1775         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1776         .get_fabric_proto_ident         = tcm_qla2xxx_get_fabric_proto_ident,
1777         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1778         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1779         .tpg_get_default_depth          = tcm_qla2xxx_get_default_depth,
1780         .tpg_get_pr_transport_id        = tcm_qla2xxx_get_pr_transport_id,
1781         .tpg_get_pr_transport_id_len    = tcm_qla2xxx_get_pr_transport_id_len,
1782         .tpg_parse_pr_out_transport_id  = tcm_qla2xxx_parse_pr_out_transport_id,
1783         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1784         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1785         .tpg_check_demo_mode_write_protect =
1786                                         tcm_qla2xxx_check_demo_write_protect,
1787         .tpg_check_prod_mode_write_protect =
1788                                         tcm_qla2xxx_check_prod_write_protect,
1789         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1790         .tpg_alloc_fabric_acl           = tcm_qla2xxx_alloc_fabric_acl,
1791         .tpg_release_fabric_acl         = tcm_qla2xxx_release_fabric_acl,
1792         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1793         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1794         .release_cmd                    = tcm_qla2xxx_release_cmd,
1795         .put_session                    = tcm_qla2xxx_put_session,
1796         .shutdown_session               = tcm_qla2xxx_shutdown_session,
1797         .close_session                  = tcm_qla2xxx_close_session,
1798         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1799         .sess_get_initiator_sid         = NULL,
1800         .write_pending                  = tcm_qla2xxx_write_pending,
1801         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1802         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1803         .get_task_tag                   = tcm_qla2xxx_get_task_tag,
1804         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1805         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1806         .queue_status                   = tcm_qla2xxx_queue_status,
1807         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1808         /*
1809          * Setup function pointers for generic logic in
1810          * target_core_fabric_configfs.c
1811          */
1812         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1813         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1814         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1815         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1816         .fabric_post_link               = NULL,
1817         .fabric_pre_unlink              = NULL,
1818         .fabric_make_np                 = NULL,
1819         .fabric_drop_np                 = NULL,
1820         .fabric_make_nodeacl            = tcm_qla2xxx_make_nodeacl,
1821         .fabric_drop_nodeacl            = tcm_qla2xxx_drop_nodeacl,
1822 };
1823
1824 static struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1825         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
1826         .get_fabric_proto_ident         = tcm_qla2xxx_get_fabric_proto_ident,
1827         .tpg_get_wwn                    = tcm_qla2xxx_npiv_get_fabric_wwn,
1828         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1829         .tpg_get_default_depth          = tcm_qla2xxx_get_default_depth,
1830         .tpg_get_pr_transport_id        = tcm_qla2xxx_get_pr_transport_id,
1831         .tpg_get_pr_transport_id_len    = tcm_qla2xxx_get_pr_transport_id_len,
1832         .tpg_parse_pr_out_transport_id  = tcm_qla2xxx_parse_pr_out_transport_id,
1833         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1834         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1835         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode,
1836         .tpg_check_prod_mode_write_protect =
1837             tcm_qla2xxx_check_prod_write_protect,
1838         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only,
1839         .tpg_alloc_fabric_acl           = tcm_qla2xxx_alloc_fabric_acl,
1840         .tpg_release_fabric_acl         = tcm_qla2xxx_release_fabric_acl,
1841         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1842         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1843         .release_cmd                    = tcm_qla2xxx_release_cmd,
1844         .put_session                    = tcm_qla2xxx_put_session,
1845         .shutdown_session               = tcm_qla2xxx_shutdown_session,
1846         .close_session                  = tcm_qla2xxx_close_session,
1847         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1848         .sess_get_initiator_sid         = NULL,
1849         .write_pending                  = tcm_qla2xxx_write_pending,
1850         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1851         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1852         .get_task_tag                   = tcm_qla2xxx_get_task_tag,
1853         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1854         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1855         .queue_status                   = tcm_qla2xxx_queue_status,
1856         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1857         /*
1858          * Setup function pointers for generic logic in
1859          * target_core_fabric_configfs.c
1860          */
1861         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1862         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1863         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1864         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1865         .fabric_post_link               = NULL,
1866         .fabric_pre_unlink              = NULL,
1867         .fabric_make_np                 = NULL,
1868         .fabric_drop_np                 = NULL,
1869         .fabric_make_nodeacl            = tcm_qla2xxx_make_nodeacl,
1870         .fabric_drop_nodeacl            = tcm_qla2xxx_drop_nodeacl,
1871 };
1872
1873 static int tcm_qla2xxx_register_configfs(void)
1874 {
1875         struct target_fabric_configfs *fabric, *npiv_fabric;
1876         int ret;
1877
1878         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on "
1879             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1880             utsname()->machine);
1881         /*
1882          * Register the top level struct config_item_type with TCM core
1883          */
1884         fabric = target_fabric_configfs_init(THIS_MODULE, "qla2xxx");
1885         if (IS_ERR(fabric)) {
1886                 pr_err("target_fabric_configfs_init() failed\n");
1887                 return PTR_ERR(fabric);
1888         }
1889         /*
1890          * Setup fabric->tf_ops from our local tcm_qla2xxx_ops
1891          */
1892         fabric->tf_ops = tcm_qla2xxx_ops;
1893         /*
1894          * Setup default attribute lists for various fabric->tf_cit_tmpl
1895          */
1896         fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_qla2xxx_wwn_attrs;
1897         fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs = tcm_qla2xxx_tpg_attrs;
1898         fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs =
1899                                                 tcm_qla2xxx_tpg_attrib_attrs;
1900         fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;
1901         fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;
1902         fabric->tf_cit_tmpl.tfc_tpg_nacl_base_cit.ct_attrs = NULL;
1903         fabric->tf_cit_tmpl.tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
1904         fabric->tf_cit_tmpl.tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
1905         fabric->tf_cit_tmpl.tfc_tpg_nacl_param_cit.ct_attrs = NULL;
1906         /*
1907          * Register the fabric for use within TCM
1908          */
1909         ret = target_fabric_configfs_register(fabric);
1910         if (ret < 0) {
1911                 pr_err("target_fabric_configfs_register() failed for TCM_QLA2XXX\n");
1912                 return ret;
1913         }
1914         /*
1915          * Setup our local pointer to *fabric
1916          */
1917         tcm_qla2xxx_fabric_configfs = fabric;
1918         pr_debug("TCM_QLA2XXX[0] - Set fabric -> tcm_qla2xxx_fabric_configfs\n");
1919
1920         /*
1921          * Register the top level struct config_item_type for NPIV with TCM core
1922          */
1923         npiv_fabric = target_fabric_configfs_init(THIS_MODULE, "qla2xxx_npiv");
1924         if (IS_ERR(npiv_fabric)) {
1925                 pr_err("target_fabric_configfs_init() failed\n");
1926                 ret = PTR_ERR(npiv_fabric);
1927                 goto out_fabric;
1928         }
1929         /*
1930          * Setup fabric->tf_ops from our local tcm_qla2xxx_npiv_ops
1931          */
1932         npiv_fabric->tf_ops = tcm_qla2xxx_npiv_ops;
1933         /*
1934          * Setup default attribute lists for various npiv_fabric->tf_cit_tmpl
1935          */
1936         npiv_fabric->tf_cit_tmpl.tfc_wwn_cit.ct_attrs = tcm_qla2xxx_wwn_attrs;
1937         npiv_fabric->tf_cit_tmpl.tfc_tpg_base_cit.ct_attrs =
1938             tcm_qla2xxx_tpg_attrs;
1939         npiv_fabric->tf_cit_tmpl.tfc_tpg_attrib_cit.ct_attrs = NULL;
1940         npiv_fabric->tf_cit_tmpl.tfc_tpg_param_cit.ct_attrs = NULL;
1941         npiv_fabric->tf_cit_tmpl.tfc_tpg_np_base_cit.ct_attrs = NULL;
1942         npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_base_cit.ct_attrs = NULL;
1943         npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
1944         npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
1945         npiv_fabric->tf_cit_tmpl.tfc_tpg_nacl_param_cit.ct_attrs = NULL;
1946         /*
1947          * Register the npiv_fabric for use within TCM
1948          */
1949         ret = target_fabric_configfs_register(npiv_fabric);
1950         if (ret < 0) {
1951                 pr_err("target_fabric_configfs_register() failed for TCM_QLA2XXX\n");
1952                 goto out_fabric;
1953         }
1954         /*
1955          * Setup our local pointer to *npiv_fabric
1956          */
1957         tcm_qla2xxx_npiv_fabric_configfs = npiv_fabric;
1958         pr_debug("TCM_QLA2XXX[0] - Set fabric -> tcm_qla2xxx_npiv_fabric_configfs\n");
1959
1960         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1961                                                 WQ_MEM_RECLAIM, 0);
1962         if (!tcm_qla2xxx_free_wq) {
1963                 ret = -ENOMEM;
1964                 goto out_fabric_npiv;
1965         }
1966
1967         tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
1968         if (!tcm_qla2xxx_cmd_wq) {
1969                 ret = -ENOMEM;
1970                 goto out_free_wq;
1971         }
1972
1973         return 0;
1974
1975 out_free_wq:
1976         destroy_workqueue(tcm_qla2xxx_free_wq);
1977 out_fabric_npiv:
1978         target_fabric_configfs_deregister(tcm_qla2xxx_npiv_fabric_configfs);
1979 out_fabric:
1980         target_fabric_configfs_deregister(tcm_qla2xxx_fabric_configfs);
1981         return ret;
1982 }
1983
1984 static void tcm_qla2xxx_deregister_configfs(void)
1985 {
1986         destroy_workqueue(tcm_qla2xxx_cmd_wq);
1987         destroy_workqueue(tcm_qla2xxx_free_wq);
1988
1989         target_fabric_configfs_deregister(tcm_qla2xxx_fabric_configfs);
1990         tcm_qla2xxx_fabric_configfs = NULL;
1991         pr_debug("TCM_QLA2XXX[0] - Cleared tcm_qla2xxx_fabric_configfs\n");
1992
1993         target_fabric_configfs_deregister(tcm_qla2xxx_npiv_fabric_configfs);
1994         tcm_qla2xxx_npiv_fabric_configfs = NULL;
1995         pr_debug("TCM_QLA2XXX[0] - Cleared tcm_qla2xxx_npiv_fabric_configfs\n");
1996 }
1997
1998 static int __init tcm_qla2xxx_init(void)
1999 {
2000         int ret;
2001
2002         ret = tcm_qla2xxx_register_configfs();
2003         if (ret < 0)
2004                 return ret;
2005
2006         return 0;
2007 }
2008
2009 static void __exit tcm_qla2xxx_exit(void)
2010 {
2011         tcm_qla2xxx_deregister_configfs();
2012 }
2013
2014 MODULE_DESCRIPTION("TCM QLA2XXX series NPIV enabled fabric driver");
2015 MODULE_LICENSE("GPL");
2016 module_init(tcm_qla2xxx_init);
2017 module_exit(tcm_qla2xxx_exit);