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  * ?? Copyright 2010-2011 RisingTide Systems LLC.
   6  *
   7  * Licensed to the Linux Foundation under the General Public License (GPL)
   8  * version 2.
   9  *
  10  * Author: Nicholas A. Bellinger <nab@risingtidesystems.com>
  11  *
  12  * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from
  13  * the TCM_FC / Open-FCoE.org fabric module.
  14  *
  15  * Copyright (c) 2010 Cisco Systems, Inc
  16  *
  17  * This program is free software; you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation; either version 2 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  ****************************************************************************/
  27
  28
  29 #include <linux/module.h>
  30 #include <linux/moduleparam.h>
  31 #include <generated/utsrelease.h>
  32 #include <linux/utsname.h>
  33 #include <linux/init.h>
  34 #include <linux/list.h>
  35 #include <linux/slab.h>
  36 #include <linux/kthread.h>
  37 #include <linux/types.h>
  38 #include <linux/string.h>
  39 #include <linux/configfs.h>
  40 #include <linux/ctype.h>
  41 #include <asm/unaligned.h>
  42 #include <scsi/scsi.h>
  43 #include <scsi/scsi_host.h>
  44 #include <scsi/scsi_device.h>
  45 #include <scsi/scsi_cmnd.h>
  46 #include <target/target_core_base.h>
  47 #include <target/target_core_fabric.h>
  48 #include <target/target_core_fabric_configfs.h>
  49 #include <target/target_core_configfs.h>
  50 #include <target/configfs_macros.h>
  51
  52 #include "qla_def.h"
  53 #include "qla_target.h"
  54 #include "tcm_qla2xxx.h"
  55
  56 struct workqueue_struct *tcm_qla2xxx_free_wq;
  57 struct workqueue_struct *tcm_qla2xxx_cmd_wq;
  58
  59 static int tcm_qla2xxx_check_true(struct se_portal_group *se_tpg)
  60 {
  61         return 1;
  62 }
  63
  64 static int tcm_qla2xxx_check_false(struct se_portal_group *se_tpg)
  65 {
  66         return 0;
  67 }
  68
  69 /*
  70  * Parse WWN.
  71  * If strict, we require lower-case hex and colon separators to be sure
  72  * the name is the same as what would be generated by ft_format_wwn()
  73  * so the name and wwn are mapped one-to-one.
  74  */
  75 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)
  76 {
  77         const char *cp;
  78         char c;
  79         u32 nibble;
  80         u32 byte = 0;
  81         u32 pos = 0;
  82         u32 err;
  83
  84         *wwn = 0;
  85         for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {
  86                 c = *cp;
  87                 if (c == '\n' && cp[1] == '\0')
  88                         continue;
  89                 if (strict && pos++ == 2 && byte++ < 7) {
  90                         pos = 0;
  91                         if (c == ':')
  92                                 continue;
  93                         err = 1;
  94                         goto fail;
  95                 }
  96                 if (c == '\0') {
  97                         err = 2;
  98                         if (strict && byte != 8)
  99                                 goto fail;
 100                         return cp - name;
 101                 }
 102                 err = 3;
 103                 if (isdigit(c))
 104                         nibble = c - '0';
 105                 else if (isxdigit(c) && (islower(c) || !strict))
 106                         nibble = tolower(c) - 'a' + 10;
 107                 else
 108                         goto fail;
 109                 *wwn = (*wwn << 4) | nibble;
 110         }
 111         err = 4;
 112 fail:
 113         pr_debug("err %u len %zu pos %u byte %u\n",
 114                         err, cp - name, pos, byte);
 115         return -1;
 116 }
 117
 118 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn)
 119 {
 120         u8 b[8];
 121
 122         put_unaligned_be64(wwn, b);
 123         return snprintf(buf, len,
 124                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 125                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]);
 126 }
 127
 128 static char *tcm_qla2xxx_get_fabric_name(void)
 129 {
 130         return "qla2xxx";
 131 }
 132
 133 /*
 134  * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn
 135  */
 136 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm)
 137 {
 138         unsigned int i, j;
 139         u8 wwn[8];
 140
 141         memset(wwn, 0, sizeof(wwn));
 142
 143         /* Validate and store the new name */
 144         for (i = 0, j = 0; i < 16; i++) {
 145                 int value;
 146
 147                 value = hex_to_bin(*ns++);
 148                 if (value >= 0)
 149                         j = (j << 4) | value;
 150                 else
 151                         return -EINVAL;
 152
 153                 if (i % 2) {
 154                         wwn[i/2] = j & 0xff;
 155                         j = 0;
 156                 }
 157         }
 158
 159         *nm = wwn_to_u64(wwn);
 160         return 0;
 161 }
 162
 163 /*
 164  * This parsing logic follows drivers/scsi/scsi_transport_fc.c:
 165  * store_fc_host_vport_create()
 166  */
 167 static int tcm_qla2xxx_npiv_parse_wwn(
 168         const char *name,
 169         size_t count,
 170         u64 *wwpn,
 171         u64 *wwnn)
 172 {
 173         unsigned int cnt = count;
 174         int rc;
 175
 176         *wwpn = 0;
 177         *wwnn = 0;
 178
 179         /* count may include a LF at end of string */
 180         if (name[cnt-1] == '\n')
 181                 cnt--;
 182
 183         /* validate we have enough characters for WWPN */
 184         if ((cnt != (16+1+16)) || (name[16] != ':'))
 185                 return -EINVAL;
 186
 187         rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn);
 188         if (rc != 0)
 189                 return rc;
 190
 191         rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn);
 192         if (rc != 0)
 193                 return rc;
 194
 195         return 0;
 196 }
 197
 198 static ssize_t tcm_qla2xxx_npiv_format_wwn(char *buf, size_t len,
 199                                         u64 wwpn, u64 wwnn)
 200 {
 201         u8 b[8], b2[8];
 202
 203         put_unaligned_be64(wwpn, b);
 204         put_unaligned_be64(wwnn, b2);
 205         return snprintf(buf, len,
 206                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x,"
 207                 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
 208                 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7],
 209                 b2[0], b2[1], b2[2], b2[3], b2[4], b2[5], b2[6], b2[7]);
 210 }
 211
 212 static char *tcm_qla2xxx_npiv_get_fabric_name(void)
 213 {
 214         return "qla2xxx_npiv";
 215 }
 216
 217 static u8 tcm_qla2xxx_get_fabric_proto_ident(struct se_portal_group *se_tpg)
 218 {
 219         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 220                                 struct tcm_qla2xxx_tpg, se_tpg);
 221         struct tcm_qla2xxx_lport *lport = tpg->lport;
 222         u8 proto_id;
 223
 224         switch (lport->lport_proto_id) {
 225         case SCSI_PROTOCOL_FCP:
 226         default:
 227                 proto_id = fc_get_fabric_proto_ident(se_tpg);
 228                 break;
 229         }
 230
 231         return proto_id;
 232 }
 233
 234 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg)
 235 {
 236         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 237                                 struct tcm_qla2xxx_tpg, se_tpg);
 238         struct tcm_qla2xxx_lport *lport = tpg->lport;
 239
 240         return lport->lport_naa_name;
 241 }
 242
 243 static char *tcm_qla2xxx_npiv_get_fabric_wwn(struct se_portal_group *se_tpg)
 244 {
 245         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 246                                 struct tcm_qla2xxx_tpg, se_tpg);
 247         struct tcm_qla2xxx_lport *lport = tpg->lport;
 248
 249         return &lport->lport_npiv_name[0];
 250 }
 251
 252 static u16 tcm_qla2xxx_get_tag(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         return tpg->lport_tpgt;
 257 }
 258
 259 static u32 tcm_qla2xxx_get_default_depth(struct se_portal_group *se_tpg)
 260 {
 261         return 1;
 262 }
 263
 264 static u32 tcm_qla2xxx_get_pr_transport_id(
 265         struct se_portal_group *se_tpg,
 266         struct se_node_acl *se_nacl,
 267         struct t10_pr_registration *pr_reg,
 268         int *format_code,
 269         unsigned char *buf)
 270 {
 271         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 272                                 struct tcm_qla2xxx_tpg, se_tpg);
 273         struct tcm_qla2xxx_lport *lport = tpg->lport;
 274         int ret = 0;
 275
 276         switch (lport->lport_proto_id) {
 277         case SCSI_PROTOCOL_FCP:
 278         default:
 279                 ret = fc_get_pr_transport_id(se_tpg, se_nacl, pr_reg,
 280                                         format_code, buf);
 281                 break;
 282         }
 283
 284         return ret;
 285 }
 286
 287 static u32 tcm_qla2xxx_get_pr_transport_id_len(
 288         struct se_portal_group *se_tpg,
 289         struct se_node_acl *se_nacl,
 290         struct t10_pr_registration *pr_reg,
 291         int *format_code)
 292 {
 293         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 294                                 struct tcm_qla2xxx_tpg, se_tpg);
 295         struct tcm_qla2xxx_lport *lport = tpg->lport;
 296         int ret = 0;
 297
 298         switch (lport->lport_proto_id) {
 299         case SCSI_PROTOCOL_FCP:
 300         default:
 301                 ret = fc_get_pr_transport_id_len(se_tpg, se_nacl, pr_reg,
 302                                         format_code);
 303                 break;
 304         }
 305
 306         return ret;
 307 }
 308
 309 static char *tcm_qla2xxx_parse_pr_out_transport_id(
 310         struct se_portal_group *se_tpg,
 311         const char *buf,
 312         u32 *out_tid_len,
 313         char **port_nexus_ptr)
 314 {
 315         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 316                                 struct tcm_qla2xxx_tpg, se_tpg);
 317         struct tcm_qla2xxx_lport *lport = tpg->lport;
 318         char *tid = NULL;
 319
 320         switch (lport->lport_proto_id) {
 321         case SCSI_PROTOCOL_FCP:
 322         default:
 323                 tid = fc_parse_pr_out_transport_id(se_tpg, buf, out_tid_len,
 324                                         port_nexus_ptr);
 325                 break;
 326         }
 327
 328         return tid;
 329 }
 330
 331 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg)
 332 {
 333         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 334                                 struct tcm_qla2xxx_tpg, se_tpg);
 335
 336         return QLA_TPG_ATTRIB(tpg)->generate_node_acls;
 337 }
 338
 339 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg)
 340 {
 341         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 342                                 struct tcm_qla2xxx_tpg, se_tpg);
 343
 344         return QLA_TPG_ATTRIB(tpg)->cache_dynamic_acls;
 345 }
 346
 347 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg)
 348 {
 349         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 350                                 struct tcm_qla2xxx_tpg, se_tpg);
 351
 352         return QLA_TPG_ATTRIB(tpg)->demo_mode_write_protect;
 353 }
 354
 355 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg)
 356 {
 357         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 358                                 struct tcm_qla2xxx_tpg, se_tpg);
 359
 360         return QLA_TPG_ATTRIB(tpg)->prod_mode_write_protect;
 361 }
 362
 363 static struct se_node_acl *tcm_qla2xxx_alloc_fabric_acl(
 364         struct se_portal_group *se_tpg)
 365 {
 366         struct tcm_qla2xxx_nacl *nacl;
 367
 368         nacl = kzalloc(sizeof(struct tcm_qla2xxx_nacl), GFP_KERNEL);
 369         if (!nacl) {
 370                 pr_err("Unable to allocate struct tcm_qla2xxx_nacl\n");
 371                 return NULL;
 372         }
 373
 374         return &nacl->se_node_acl;
 375 }
 376
 377 static void tcm_qla2xxx_release_fabric_acl(
 378         struct se_portal_group *se_tpg,
 379         struct se_node_acl *se_nacl)
 380 {
 381         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 382                         struct tcm_qla2xxx_nacl, se_node_acl);
 383         kfree(nacl);
 384 }
 385
 386 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg)
 387 {
 388         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 389                                 struct tcm_qla2xxx_tpg, se_tpg);
 390
 391         return tpg->lport_tpgt;
 392 }
 393
 394 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work)
 395 {
 396         struct qla_tgt_mgmt_cmd *mcmd = container_of(work,
 397                         struct qla_tgt_mgmt_cmd, free_work);
 398
 399         transport_generic_free_cmd(&mcmd->se_cmd, 0);
 400 }
 401
 402 /*
 403  * Called from qla_target_template->free_mcmd(), and will call
 404  * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops
 405  * release callback.  qla_hw_data->hardware_lock is expected to be held
 406  */
 407 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd)
 408 {
 409         INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd);
 410         queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work);
 411 }
 412
 413 static void tcm_qla2xxx_complete_free(struct work_struct *work)
 414 {
 415         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 416
 417         transport_generic_free_cmd(&cmd->se_cmd, 0);
 418 }
 419
 420 /*
 421  * Called from qla_target_template->free_cmd(), and will call
 422  * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops
 423  * release callback.  qla_hw_data->hardware_lock is expected to be held
 424  */
 425 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd)
 426 {
 427         INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free);
 428         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 429 }
 430
 431 /*
 432  * Called from struct target_core_fabric_ops->check_stop_free() context
 433  */
 434 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd)
 435 {
 436         return target_put_sess_cmd(se_cmd->se_sess, se_cmd);
 437 }
 438
 439 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying
 440  * fabric descriptor @se_cmd command to release
 441  */
 442 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd)
 443 {
 444         struct qla_tgt_cmd *cmd;
 445
 446         if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) {
 447                 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 448                                 struct qla_tgt_mgmt_cmd, se_cmd);
 449                 qlt_free_mcmd(mcmd);
 450                 return;
 451         }
 452
 453         cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd);
 454         qlt_free_cmd(cmd);
 455 }
 456
 457 static int tcm_qla2xxx_shutdown_session(struct se_session *se_sess)
 458 {
 459         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 460         struct scsi_qla_host *vha;
 461         unsigned long flags;
 462
 463         BUG_ON(!sess);
 464         vha = sess->vha;
 465
 466         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
 467         target_sess_cmd_list_set_waiting(se_sess);
 468         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
 469
 470         return 1;
 471 }
 472
 473 static void tcm_qla2xxx_close_session(struct se_session *se_sess)
 474 {
 475         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 476         struct scsi_qla_host *vha;
 477         unsigned long flags;
 478
 479         BUG_ON(!sess);
 480         vha = sess->vha;
 481
 482         spin_lock_irqsave(&vha->hw->hardware_lock, flags);
 483         qlt_unreg_sess(sess);
 484         spin_unlock_irqrestore(&vha->hw->hardware_lock, flags);
 485 }
 486
 487 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess)
 488 {
 489         return 0;
 490 }
 491
 492 /*
 493  * The LIO target core uses DMA_TO_DEVICE to mean that data is going
 494  * to the target (eg handling a WRITE) and DMA_FROM_DEVICE to mean
 495  * that data is coming from the target (eg handling a READ).  However,
 496  * this is just the opposite of what we have to tell the DMA mapping
 497  * layer -- eg when handling a READ, the HBA will have to DMA the data
 498  * out of memory so it can send it to the initiator, which means we
 499  * need to use DMA_TO_DEVICE when we map the data.
 500  */
 501 static enum dma_data_direction tcm_qla2xxx_mapping_dir(struct se_cmd *se_cmd)
 502 {
 503         if (se_cmd->se_cmd_flags & SCF_BIDI)
 504                 return DMA_BIDIRECTIONAL;
 505
 506         switch (se_cmd->data_direction) {
 507         case DMA_TO_DEVICE:
 508                 return DMA_FROM_DEVICE;
 509         case DMA_FROM_DEVICE:
 510                 return DMA_TO_DEVICE;
 511         case DMA_NONE:
 512         default:
 513                 return DMA_NONE;
 514         }
 515 }
 516
 517 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd)
 518 {
 519         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 520                                 struct qla_tgt_cmd, se_cmd);
 521
 522         cmd->bufflen = se_cmd->data_length;
 523         cmd->dma_data_direction = tcm_qla2xxx_mapping_dir(se_cmd);
 524
 525         cmd->sg_cnt = se_cmd->t_data_nents;
 526         cmd->sg = se_cmd->t_data_sg;
 527
 528         /*
 529          * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup
 530          * the SGL mappings into PCIe memory for incoming FCP WRITE data.
 531          */
 532         return qlt_rdy_to_xfer(cmd);
 533 }
 534
 535 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd)
 536 {
 537         unsigned long flags;
 538         /*
 539          * Check for WRITE_PENDING status to determine if we need to wait for
 540          * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data().
 541          */
 542         spin_lock_irqsave(&se_cmd->t_state_lock, flags);
 543         if (se_cmd->t_state == TRANSPORT_WRITE_PENDING ||
 544             se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) {
 545                 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 546                 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp,
 547                                                 3000);
 548                 return 0;
 549         }
 550         spin_unlock_irqrestore(&se_cmd->t_state_lock, flags);
 551
 552         return 0;
 553 }
 554
 555 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl)
 556 {
 557         return;
 558 }
 559
 560 static u32 tcm_qla2xxx_get_task_tag(struct se_cmd *se_cmd)
 561 {
 562         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 563                                 struct qla_tgt_cmd, se_cmd);
 564
 565         return cmd->tag;
 566 }
 567
 568 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd)
 569 {
 570         return 0;
 571 }
 572
 573 /*
 574  * Called from process context in qla_target.c:qlt_do_work() code
 575  */
 576 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd,
 577         unsigned char *cdb, uint32_t data_length, int fcp_task_attr,
 578         int data_dir, int bidi)
 579 {
 580         struct se_cmd *se_cmd = &cmd->se_cmd;
 581         struct se_session *se_sess;
 582         struct qla_tgt_sess *sess;
 583         int flags = TARGET_SCF_ACK_KREF;
 584
 585         if (bidi)
 586                 flags |= TARGET_SCF_BIDI_OP;
 587
 588         sess = cmd->sess;
 589         if (!sess) {
 590                 pr_err("Unable to locate struct qla_tgt_sess from qla_tgt_cmd\n");
 591                 return -EINVAL;
 592         }
 593
 594         se_sess = sess->se_sess;
 595         if (!se_sess) {
 596                 pr_err("Unable to locate active struct se_session\n");
 597                 return -EINVAL;
 598         }
 599
 600         return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0],
 601                                 cmd->unpacked_lun, data_length, fcp_task_attr,
 602                                 data_dir, flags);
 603 }
 604
 605 static void tcm_qla2xxx_handle_data_work(struct work_struct *work)
 606 {
 607         struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work);
 608
 609         /*
 610          * Ensure that the complete FCP WRITE payload has been received.
 611          * Otherwise return an exception via CHECK_CONDITION status.
 612          */
 613         if (!cmd->write_data_transferred) {
 614                 /*
 615                  * Check if se_cmd has already been aborted via LUN_RESET, and
 616                  * waiting upon completion in tcm_qla2xxx_write_pending_status()
 617                  */
 618                 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) {
 619                         complete(&cmd->se_cmd.t_transport_stop_comp);
 620                         return;
 621                 }
 622
 623                 cmd->se_cmd.scsi_sense_reason = TCM_CHECK_CONDITION_ABORT_CMD;
 624                 transport_generic_request_failure(&cmd->se_cmd);
 625                 return;
 626         }
 627
 628         return target_execute_cmd(&cmd->se_cmd);
 629 }
 630
 631 /*
 632  * Called from qla_target.c:qlt_do_ctio_completion()
 633  */
 634 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd)
 635 {
 636         INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work);
 637         queue_work(tcm_qla2xxx_free_wq, &cmd->work);
 638 }
 639
 640 /*
 641  * Called from qla_target.c:qlt_issue_task_mgmt()
 642  */
 643 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun,
 644         uint8_t tmr_func, uint32_t tag)
 645 {
 646         struct qla_tgt_sess *sess = mcmd->sess;
 647         struct se_cmd *se_cmd = &mcmd->se_cmd;
 648
 649         return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd,
 650                         tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF);
 651 }
 652
 653 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd)
 654 {
 655         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 656                                 struct qla_tgt_cmd, se_cmd);
 657
 658         cmd->bufflen = se_cmd->data_length;
 659         cmd->dma_data_direction = tcm_qla2xxx_mapping_dir(se_cmd);
 660         cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);
 661
 662         cmd->sg_cnt = se_cmd->t_data_nents;
 663         cmd->sg = se_cmd->t_data_sg;
 664         cmd->offset = 0;
 665
 666         /*
 667          * Now queue completed DATA_IN the qla2xxx LLD and response ring
 668          */
 669         return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS,
 670                                 se_cmd->scsi_status);
 671 }
 672
 673 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd)
 674 {
 675         struct qla_tgt_cmd *cmd = container_of(se_cmd,
 676                                 struct qla_tgt_cmd, se_cmd);
 677         int xmit_type = QLA_TGT_XMIT_STATUS;
 678
 679         cmd->bufflen = se_cmd->data_length;
 680         cmd->sg = NULL;
 681         cmd->sg_cnt = 0;
 682         cmd->offset = 0;
 683         cmd->dma_data_direction = tcm_qla2xxx_mapping_dir(se_cmd);
 684         cmd->aborted = (se_cmd->transport_state & CMD_T_ABORTED);
 685
 686         if (se_cmd->data_direction == DMA_FROM_DEVICE) {
 687                 /*
 688                  * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen
 689                  * for qla_tgt_xmit_response LLD code
 690                  */
 691                 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT;
 692                 se_cmd->residual_count = se_cmd->data_length;
 693
 694                 cmd->bufflen = 0;
 695         }
 696         /*
 697          * Now queue status response to qla2xxx LLD code and response ring
 698          */
 699         return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status);
 700 }
 701
 702 static int tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd)
 703 {
 704         struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
 705         struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd,
 706                                 struct qla_tgt_mgmt_cmd, se_cmd);
 707
 708         pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n",
 709                         mcmd, se_tmr->function, se_tmr->response);
 710         /*
 711          * Do translation between TCM TM response codes and
 712          * QLA2xxx FC TM response codes.
 713          */
 714         switch (se_tmr->response) {
 715         case TMR_FUNCTION_COMPLETE:
 716                 mcmd->fc_tm_rsp = FC_TM_SUCCESS;
 717                 break;
 718         case TMR_TASK_DOES_NOT_EXIST:
 719                 mcmd->fc_tm_rsp = FC_TM_BAD_CMD;
 720                 break;
 721         case TMR_FUNCTION_REJECTED:
 722                 mcmd->fc_tm_rsp = FC_TM_REJECT;
 723                 break;
 724         case TMR_LUN_DOES_NOT_EXIST:
 725         default:
 726                 mcmd->fc_tm_rsp = FC_TM_FAILED;
 727                 break;
 728         }
 729         /*
 730          * Queue the TM response to QLA2xxx LLD to build a
 731          * CTIO response packet.
 732          */
 733         qlt_xmit_tm_rsp(mcmd);
 734
 735         return 0;
 736 }
 737
 738 /* Local pointer to allocated TCM configfs fabric module */
 739 struct target_fabric_configfs *tcm_qla2xxx_fabric_configfs;
 740 struct target_fabric_configfs *tcm_qla2xxx_npiv_fabric_configfs;
 741
 742 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *,
 743                         struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *);
 744 /*
 745  * Expected to be called with struct qla_hw_data->hardware_lock held
 746  */
 747 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess)
 748 {
 749         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
 750         struct se_portal_group *se_tpg = se_nacl->se_tpg;
 751         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 752         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 753                                 struct tcm_qla2xxx_lport, lport_wwn);
 754         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
 755                                 struct tcm_qla2xxx_nacl, se_node_acl);
 756         void *node;
 757
 758         pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id);
 759
 760         node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id);
 761         WARN_ON(node && (node != se_nacl));
 762
 763         pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n",
 764             se_nacl, nacl->nport_wwnn, nacl->nport_id);
 765         /*
 766          * Now clear the se_nacl and session pointers from our HW lport lookup
 767          * table mapping for this initiator's fabric S_ID and LOOP_ID entries.
 768          *
 769          * This is done ahead of callbacks into tcm_qla2xxx_free_session() ->
 770          * target_wait_for_sess_cmds() before the session waits for outstanding
 771          * I/O to complete, to avoid a race between session shutdown execution
 772          * and incoming ATIOs or TMRs picking up a stale se_node_act reference.
 773          */
 774         tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess);
 775 }
 776
 777 static void tcm_qla2xxx_release_session(struct kref *kref)
 778 {
 779         struct se_session *se_sess = container_of(kref,
 780                         struct se_session, sess_kref);
 781
 782         qlt_unreg_sess(se_sess->fabric_sess_ptr);
 783 }
 784
 785 static void tcm_qla2xxx_put_session(struct se_session *se_sess)
 786 {
 787         struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr;
 788         struct qla_hw_data *ha = sess->vha->hw;
 789         unsigned long flags;
 790
 791         spin_lock_irqsave(&ha->hardware_lock, flags);
 792         kref_put(&se_sess->sess_kref, tcm_qla2xxx_release_session);
 793         spin_unlock_irqrestore(&ha->hardware_lock, flags);
 794 }
 795
 796 static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess)
 797 {
 798         tcm_qla2xxx_put_session(sess->se_sess);
 799 }
 800
 801 static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess)
 802 {
 803         tcm_qla2xxx_shutdown_session(sess->se_sess);
 804 }
 805
 806 static struct se_node_acl *tcm_qla2xxx_make_nodeacl(
 807         struct se_portal_group *se_tpg,
 808         struct config_group *group,
 809         const char *name)
 810 {
 811         struct se_node_acl *se_nacl, *se_nacl_new;
 812         struct tcm_qla2xxx_nacl *nacl;
 813         u64 wwnn;
 814         u32 qla2xxx_nexus_depth;
 815
 816         if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0)
 817                 return ERR_PTR(-EINVAL);
 818
 819         se_nacl_new = tcm_qla2xxx_alloc_fabric_acl(se_tpg);
 820         if (!se_nacl_new)
 821                 return ERR_PTR(-ENOMEM);
 822 /* #warning FIXME: Hardcoded qla2xxx_nexus depth in tcm_qla2xxx_make_nodeacl */
 823         qla2xxx_nexus_depth = 1;
 824
 825         /*
 826          * se_nacl_new may be released by core_tpg_add_initiator_node_acl()
 827          * when converting a NodeACL from demo mode -> explict
 828          */
 829         se_nacl = core_tpg_add_initiator_node_acl(se_tpg, se_nacl_new,
 830                                 name, qla2xxx_nexus_depth);
 831         if (IS_ERR(se_nacl)) {
 832                 tcm_qla2xxx_release_fabric_acl(se_tpg, se_nacl_new);
 833                 return se_nacl;
 834         }
 835         /*
 836          * Locate our struct tcm_qla2xxx_nacl and set the FC Nport WWPN
 837          */
 838         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
 839         nacl->nport_wwnn = wwnn;
 840         tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn);
 841
 842         return se_nacl;
 843 }
 844
 845 static void tcm_qla2xxx_drop_nodeacl(struct se_node_acl *se_acl)
 846 {
 847         struct se_portal_group *se_tpg = se_acl->se_tpg;
 848         struct tcm_qla2xxx_nacl *nacl = container_of(se_acl,
 849                                 struct tcm_qla2xxx_nacl, se_node_acl);
 850
 851         core_tpg_del_initiator_node_acl(se_tpg, se_acl, 1);
 852         kfree(nacl);
 853 }
 854
 855 /* Start items for tcm_qla2xxx_tpg_attrib_cit */
 856
 857 #define DEF_QLA_TPG_ATTRIB(name)                                        \
 858                                                                         \
 859 static ssize_t tcm_qla2xxx_tpg_attrib_show_##name(                      \
 860         struct se_portal_group *se_tpg,                                 \
 861         char *page)                                                     \
 862 {                                                                       \
 863         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 864                         struct tcm_qla2xxx_tpg, se_tpg);                \
 865                                                                         \
 866         return sprintf(page, "%u\n", QLA_TPG_ATTRIB(tpg)->name);        \
 867 }                                                                       \
 868                                                                         \
 869 static ssize_t tcm_qla2xxx_tpg_attrib_store_##name(                     \
 870         struct se_portal_group *se_tpg,                                 \
 871         const char *page,                                               \
 872         size_t count)                                                   \
 873 {                                                                       \
 874         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,              \
 875                         struct tcm_qla2xxx_tpg, se_tpg);                \
 876         unsigned long val;                                              \
 877         int ret;                                                        \
 878                                                                         \
 879         ret = kstrtoul(page, 0, &val);                                  \
 880         if (ret < 0) {                                                  \
 881                 pr_err("kstrtoul() failed with"                         \
 882                                 " ret: %d\n", ret);                     \
 883                 return -EINVAL;                                         \
 884         }                                                               \
 885         ret = tcm_qla2xxx_set_attrib_##name(tpg, val);                  \
 886                                                                         \
 887         return (!ret) ? count : -EINVAL;                                \
 888 }
 889
 890 #define DEF_QLA_TPG_ATTR_BOOL(_name)                                    \
 891                                                                         \
 892 static int tcm_qla2xxx_set_attrib_##_name(                              \
 893         struct tcm_qla2xxx_tpg *tpg,                                    \
 894         unsigned long val)                                              \
 895 {                                                                       \
 896         struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib;            \
 897                                                                         \
 898         if ((val != 0) && (val != 1)) {                                 \
 899                 pr_err("Illegal boolean value %lu\n", val);             \
 900                 return -EINVAL;                                         \
 901         }                                                               \
 902                                                                         \
 903         a->_name = val;                                                 \
 904         return 0;                                                       \
 905 }
 906
 907 #define QLA_TPG_ATTR(_name, _mode) \
 908         TF_TPG_ATTRIB_ATTR(tcm_qla2xxx, _name, _mode);
 909
 910 /*
 911  * Define tcm_qla2xxx_tpg_attrib_s_generate_node_acls
 912  */
 913 DEF_QLA_TPG_ATTR_BOOL(generate_node_acls);
 914 DEF_QLA_TPG_ATTRIB(generate_node_acls);
 915 QLA_TPG_ATTR(generate_node_acls, S_IRUGO | S_IWUSR);
 916
 917 /*
 918  Define tcm_qla2xxx_attrib_s_cache_dynamic_acls
 919  */
 920 DEF_QLA_TPG_ATTR_BOOL(cache_dynamic_acls);
 921 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls);
 922 QLA_TPG_ATTR(cache_dynamic_acls, S_IRUGO | S_IWUSR);
 923
 924 /*
 925  * Define tcm_qla2xxx_tpg_attrib_s_demo_mode_write_protect
 926  */
 927 DEF_QLA_TPG_ATTR_BOOL(demo_mode_write_protect);
 928 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect);
 929 QLA_TPG_ATTR(demo_mode_write_protect, S_IRUGO | S_IWUSR);
 930
 931 /*
 932  * Define tcm_qla2xxx_tpg_attrib_s_prod_mode_write_protect
 933  */
 934 DEF_QLA_TPG_ATTR_BOOL(prod_mode_write_protect);
 935 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect);
 936 QLA_TPG_ATTR(prod_mode_write_protect, S_IRUGO | S_IWUSR);
 937
 938 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = {
 939         &tcm_qla2xxx_tpg_attrib_generate_node_acls.attr,
 940         &tcm_qla2xxx_tpg_attrib_cache_dynamic_acls.attr,
 941         &tcm_qla2xxx_tpg_attrib_demo_mode_write_protect.attr,
 942         &tcm_qla2xxx_tpg_attrib_prod_mode_write_protect.attr,
 943         NULL,
 944 };
 945
 946 /* End items for tcm_qla2xxx_tpg_attrib_cit */
 947
 948 static ssize_t tcm_qla2xxx_tpg_show_enable(
 949         struct se_portal_group *se_tpg,
 950         char *page)
 951 {
 952         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 953                         struct tcm_qla2xxx_tpg, se_tpg);
 954
 955         return snprintf(page, PAGE_SIZE, "%d\n",
 956                         atomic_read(&tpg->lport_tpg_enabled));
 957 }
 958
 959 static ssize_t tcm_qla2xxx_tpg_store_enable(
 960         struct se_portal_group *se_tpg,
 961         const char *page,
 962         size_t count)
 963 {
 964         struct se_wwn *se_wwn = se_tpg->se_tpg_wwn;
 965         struct tcm_qla2xxx_lport *lport = container_of(se_wwn,
 966                         struct tcm_qla2xxx_lport, lport_wwn);
 967         struct scsi_qla_host *vha = lport->qla_vha;
 968         struct qla_hw_data *ha = vha->hw;
 969         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
 970                         struct tcm_qla2xxx_tpg, se_tpg);
 971         unsigned long op;
 972         int rc;
 973
 974         rc = kstrtoul(page, 0, &op);
 975         if (rc < 0) {
 976                 pr_err("kstrtoul() returned %d\n", rc);
 977                 return -EINVAL;
 978         }
 979         if ((op != 1) && (op != 0)) {
 980                 pr_err("Illegal value for tpg_enable: %lu\n", op);
 981                 return -EINVAL;
 982         }
 983
 984         if (op) {
 985                 atomic_set(&tpg->lport_tpg_enabled, 1);
 986                 qlt_enable_vha(vha);
 987         } else {
 988                 if (!ha->tgt.qla_tgt) {
 989                         pr_err("truct qla_hw_data *ha->tgt.qla_tgt is NULL\n");
 990                         return -ENODEV;
 991                 }
 992                 atomic_set(&tpg->lport_tpg_enabled, 0);
 993                 qlt_stop_phase1(ha->tgt.qla_tgt);
 994         }
 995
 996         return count;
 997 }
 998
 999 TF_TPG_BASE_ATTR(tcm_qla2xxx, enable, S_IRUGO | S_IWUSR);
1000
1001 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = {
1002         &tcm_qla2xxx_tpg_enable.attr,
1003         NULL,
1004 };
1005
1006 static struct se_portal_group *tcm_qla2xxx_make_tpg(
1007         struct se_wwn *wwn,
1008         struct config_group *group,
1009         const char *name)
1010 {
1011         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1012                         struct tcm_qla2xxx_lport, lport_wwn);
1013         struct tcm_qla2xxx_tpg *tpg;
1014         unsigned long tpgt;
1015         int ret;
1016
1017         if (strstr(name, "tpgt_") != name)
1018                 return ERR_PTR(-EINVAL);
1019         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1020                 return ERR_PTR(-EINVAL);
1021
1022         if (!lport->qla_npiv_vp && (tpgt != 1)) {
1023                 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n");
1024                 return ERR_PTR(-ENOSYS);
1025         }
1026
1027         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1028         if (!tpg) {
1029                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1030                 return ERR_PTR(-ENOMEM);
1031         }
1032         tpg->lport = lport;
1033         tpg->lport_tpgt = tpgt;
1034         /*
1035          * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic
1036          * NodeACLs
1037          */
1038         QLA_TPG_ATTRIB(tpg)->generate_node_acls = 1;
1039         QLA_TPG_ATTRIB(tpg)->demo_mode_write_protect = 1;
1040         QLA_TPG_ATTRIB(tpg)->cache_dynamic_acls = 1;
1041
1042         ret = core_tpg_register(&tcm_qla2xxx_fabric_configfs->tf_ops, wwn,
1043                                 &tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
1044         if (ret < 0) {
1045                 kfree(tpg);
1046                 return NULL;
1047         }
1048         /*
1049          * Setup local TPG=1 pointer for non NPIV mode.
1050          */
1051         if (lport->qla_npiv_vp == NULL)
1052                 lport->tpg_1 = tpg;
1053
1054         return &tpg->se_tpg;
1055 }
1056
1057 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg)
1058 {
1059         struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg,
1060                         struct tcm_qla2xxx_tpg, se_tpg);
1061         struct tcm_qla2xxx_lport *lport = tpg->lport;
1062         struct scsi_qla_host *vha = lport->qla_vha;
1063         struct qla_hw_data *ha = vha->hw;
1064         /*
1065          * Call into qla2x_target.c LLD logic to shutdown the active
1066          * FC Nexuses and disable target mode operation for this qla_hw_data
1067          */
1068         if (ha->tgt.qla_tgt && !ha->tgt.qla_tgt->tgt_stop)
1069                 qlt_stop_phase1(ha->tgt.qla_tgt);
1070
1071         core_tpg_deregister(se_tpg);
1072         /*
1073          * Clear local TPG=1 pointer for non NPIV mode.
1074          */
1075         if (lport->qla_npiv_vp == NULL)
1076                 lport->tpg_1 = NULL;
1077
1078         kfree(tpg);
1079 }
1080
1081 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg(
1082         struct se_wwn *wwn,
1083         struct config_group *group,
1084         const char *name)
1085 {
1086         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1087                         struct tcm_qla2xxx_lport, lport_wwn);
1088         struct tcm_qla2xxx_tpg *tpg;
1089         unsigned long tpgt;
1090         int ret;
1091
1092         if (strstr(name, "tpgt_") != name)
1093                 return ERR_PTR(-EINVAL);
1094         if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX)
1095                 return ERR_PTR(-EINVAL);
1096
1097         tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL);
1098         if (!tpg) {
1099                 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n");
1100                 return ERR_PTR(-ENOMEM);
1101         }
1102         tpg->lport = lport;
1103         tpg->lport_tpgt = tpgt;
1104
1105         ret = core_tpg_register(&tcm_qla2xxx_npiv_fabric_configfs->tf_ops, wwn,
1106                                 &tpg->se_tpg, tpg, TRANSPORT_TPG_TYPE_NORMAL);
1107         if (ret < 0) {
1108                 kfree(tpg);
1109                 return NULL;
1110         }
1111         return &tpg->se_tpg;
1112 }
1113
1114 /*
1115  * Expected to be called with struct qla_hw_data->hardware_lock held
1116  */
1117 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_s_id(
1118         scsi_qla_host_t *vha,
1119         const uint8_t *s_id)
1120 {
1121         struct qla_hw_data *ha = vha->hw;
1122         struct tcm_qla2xxx_lport *lport;
1123         struct se_node_acl *se_nacl;
1124         struct tcm_qla2xxx_nacl *nacl;
1125         u32 key;
1126
1127         lport = ha->tgt.target_lport_ptr;
1128         if (!lport) {
1129                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1130                 dump_stack();
1131                 return NULL;
1132         }
1133
1134         key = (((unsigned long)s_id[0] << 16) |
1135                ((unsigned long)s_id[1] << 8) |
1136                (unsigned long)s_id[2]);
1137         pr_debug("find_sess_by_s_id: 0x%06x\n", key);
1138
1139         se_nacl = btree_lookup32(&lport->lport_fcport_map, key);
1140         if (!se_nacl) {
1141                 pr_debug("Unable to locate s_id: 0x%06x\n", key);
1142                 return NULL;
1143         }
1144         pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n",
1145             se_nacl, se_nacl->initiatorname);
1146
1147         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1148         if (!nacl->qla_tgt_sess) {
1149                 pr_err("Unable to locate struct qla_tgt_sess\n");
1150                 return NULL;
1151         }
1152
1153         return nacl->qla_tgt_sess;
1154 }
1155
1156 /*
1157  * Expected to be called with struct qla_hw_data->hardware_lock held
1158  */
1159 static void tcm_qla2xxx_set_sess_by_s_id(
1160         struct tcm_qla2xxx_lport *lport,
1161         struct se_node_acl *new_se_nacl,
1162         struct tcm_qla2xxx_nacl *nacl,
1163         struct se_session *se_sess,
1164         struct qla_tgt_sess *qla_tgt_sess,
1165         uint8_t *s_id)
1166 {
1167         u32 key;
1168         void *slot;
1169         int rc;
1170
1171         key = (((unsigned long)s_id[0] << 16) |
1172                ((unsigned long)s_id[1] << 8) |
1173                (unsigned long)s_id[2]);
1174         pr_debug("set_sess_by_s_id: %06x\n", key);
1175
1176         slot = btree_lookup32(&lport->lport_fcport_map, key);
1177         if (!slot) {
1178                 if (new_se_nacl) {
1179                         pr_debug("Setting up new fc_port entry to new_se_nacl\n");
1180                         nacl->nport_id = key;
1181                         rc = btree_insert32(&lport->lport_fcport_map, key,
1182                                         new_se_nacl, GFP_ATOMIC);
1183                         if (rc)
1184                                 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n",
1185                                     (int)key);
1186                 } else {
1187                         pr_debug("Wiping nonexisting fc_port entry\n");
1188                 }
1189
1190                 qla_tgt_sess->se_sess = se_sess;
1191                 nacl->qla_tgt_sess = qla_tgt_sess;
1192                 return;
1193         }
1194
1195         if (nacl->qla_tgt_sess) {
1196                 if (new_se_nacl == NULL) {
1197                         pr_debug("Clearing existing nacl->qla_tgt_sess and fc_port entry\n");
1198                         btree_remove32(&lport->lport_fcport_map, key);
1199                         nacl->qla_tgt_sess = NULL;
1200                         return;
1201                 }
1202                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_port entry\n");
1203                 btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1204                 qla_tgt_sess->se_sess = se_sess;
1205                 nacl->qla_tgt_sess = qla_tgt_sess;
1206                 return;
1207         }
1208
1209         if (new_se_nacl == NULL) {
1210                 pr_debug("Clearing existing fc_port entry\n");
1211                 btree_remove32(&lport->lport_fcport_map, key);
1212                 return;
1213         }
1214
1215         pr_debug("Replacing existing fc_port entry w/o active nacl->qla_tgt_sess\n");
1216         btree_update32(&lport->lport_fcport_map, key, new_se_nacl);
1217         qla_tgt_sess->se_sess = se_sess;
1218         nacl->qla_tgt_sess = qla_tgt_sess;
1219
1220         pr_debug("Setup nacl->qla_tgt_sess %p by s_id for se_nacl: %p, initiatorname: %s\n",
1221             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1222 }
1223
1224 /*
1225  * Expected to be called with struct qla_hw_data->hardware_lock held
1226  */
1227 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_loop_id(
1228         scsi_qla_host_t *vha,
1229         const uint16_t loop_id)
1230 {
1231         struct qla_hw_data *ha = vha->hw;
1232         struct tcm_qla2xxx_lport *lport;
1233         struct se_node_acl *se_nacl;
1234         struct tcm_qla2xxx_nacl *nacl;
1235         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1236
1237         lport = ha->tgt.target_lport_ptr;
1238         if (!lport) {
1239                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1240                 dump_stack();
1241                 return NULL;
1242         }
1243
1244         pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1245
1246         fc_loopid = lport->lport_loopid_map + loop_id;
1247         se_nacl = fc_loopid->se_nacl;
1248         if (!se_nacl) {
1249                 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n",
1250                     loop_id);
1251                 return NULL;
1252         }
1253
1254         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1255
1256         if (!nacl->qla_tgt_sess) {
1257                 pr_err("Unable to locate struct qla_tgt_sess\n");
1258                 return NULL;
1259         }
1260
1261         return nacl->qla_tgt_sess;
1262 }
1263
1264 /*
1265  * Expected to be called with struct qla_hw_data->hardware_lock held
1266  */
1267 static void tcm_qla2xxx_set_sess_by_loop_id(
1268         struct tcm_qla2xxx_lport *lport,
1269         struct se_node_acl *new_se_nacl,
1270         struct tcm_qla2xxx_nacl *nacl,
1271         struct se_session *se_sess,
1272         struct qla_tgt_sess *qla_tgt_sess,
1273         uint16_t loop_id)
1274 {
1275         struct se_node_acl *saved_nacl;
1276         struct tcm_qla2xxx_fc_loopid *fc_loopid;
1277
1278         pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id);
1279
1280         fc_loopid = &((struct tcm_qla2xxx_fc_loopid *)
1281                         lport->lport_loopid_map)[loop_id];
1282
1283         saved_nacl = fc_loopid->se_nacl;
1284         if (!saved_nacl) {
1285                 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n");
1286                 fc_loopid->se_nacl = new_se_nacl;
1287                 if (qla_tgt_sess->se_sess != se_sess)
1288                         qla_tgt_sess->se_sess = se_sess;
1289                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1290                         nacl->qla_tgt_sess = qla_tgt_sess;
1291                 return;
1292         }
1293
1294         if (nacl->qla_tgt_sess) {
1295                 if (new_se_nacl == NULL) {
1296                         pr_debug("Clearing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1297                         fc_loopid->se_nacl = NULL;
1298                         nacl->qla_tgt_sess = NULL;
1299                         return;
1300                 }
1301
1302                 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_loopid->se_nacl\n");
1303                 fc_loopid->se_nacl = new_se_nacl;
1304                 if (qla_tgt_sess->se_sess != se_sess)
1305                         qla_tgt_sess->se_sess = se_sess;
1306                 if (nacl->qla_tgt_sess != qla_tgt_sess)
1307                         nacl->qla_tgt_sess = qla_tgt_sess;
1308                 return;
1309         }
1310
1311         if (new_se_nacl == NULL) {
1312                 pr_debug("Clearing fc_loopid->se_nacl\n");
1313                 fc_loopid->se_nacl = NULL;
1314                 return;
1315         }
1316
1317         pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->qla_tgt_sess\n");
1318         fc_loopid->se_nacl = new_se_nacl;
1319         if (qla_tgt_sess->se_sess != se_sess)
1320                 qla_tgt_sess->se_sess = se_sess;
1321         if (nacl->qla_tgt_sess != qla_tgt_sess)
1322                 nacl->qla_tgt_sess = qla_tgt_sess;
1323
1324         pr_debug("Setup nacl->qla_tgt_sess %p by loop_id for se_nacl: %p, initiatorname: %s\n",
1325             nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname);
1326 }
1327
1328 /*
1329  * Should always be called with qla_hw_data->hardware_lock held.
1330  */
1331 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport,
1332                 struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess)
1333 {
1334         struct se_session *se_sess = sess->se_sess;
1335         unsigned char be_sid[3];
1336
1337         be_sid[0] = sess->s_id.b.domain;
1338         be_sid[1] = sess->s_id.b.area;
1339         be_sid[2] = sess->s_id.b.al_pa;
1340
1341         tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess,
1342                                 sess, be_sid);
1343         tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess,
1344                                 sess, sess->loop_id);
1345 }
1346
1347 static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess)
1348 {
1349         struct qla_tgt *tgt = sess->tgt;
1350         struct qla_hw_data *ha = tgt->ha;
1351         struct se_session *se_sess;
1352         struct se_node_acl *se_nacl;
1353         struct tcm_qla2xxx_lport *lport;
1354         struct tcm_qla2xxx_nacl *nacl;
1355
1356         BUG_ON(in_interrupt());
1357
1358         se_sess = sess->se_sess;
1359         if (!se_sess) {
1360                 pr_err("struct qla_tgt_sess->se_sess is NULL\n");
1361                 dump_stack();
1362                 return;
1363         }
1364         se_nacl = se_sess->se_node_acl;
1365         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1366
1367         lport = ha->tgt.target_lport_ptr;
1368         if (!lport) {
1369                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1370                 dump_stack();
1371                 return;
1372         }
1373         target_wait_for_sess_cmds(se_sess, 0);
1374
1375         transport_deregister_session_configfs(sess->se_sess);
1376         transport_deregister_session(sess->se_sess);
1377 }
1378
1379 /*
1380  * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl()
1381  * to locate struct se_node_acl
1382  */
1383 static int tcm_qla2xxx_check_initiator_node_acl(
1384         scsi_qla_host_t *vha,
1385         unsigned char *fc_wwpn,
1386         void *qla_tgt_sess,
1387         uint8_t *s_id,
1388         uint16_t loop_id)
1389 {
1390         struct qla_hw_data *ha = vha->hw;
1391         struct tcm_qla2xxx_lport *lport;
1392         struct tcm_qla2xxx_tpg *tpg;
1393         struct tcm_qla2xxx_nacl *nacl;
1394         struct se_portal_group *se_tpg;
1395         struct se_node_acl *se_nacl;
1396         struct se_session *se_sess;
1397         struct qla_tgt_sess *sess = qla_tgt_sess;
1398         unsigned char port_name[36];
1399         unsigned long flags;
1400
1401         lport = ha->tgt.target_lport_ptr;
1402         if (!lport) {
1403                 pr_err("Unable to locate struct tcm_qla2xxx_lport\n");
1404                 dump_stack();
1405                 return -EINVAL;
1406         }
1407         /*
1408          * Locate the TPG=1 reference..
1409          */
1410         tpg = lport->tpg_1;
1411         if (!tpg) {
1412                 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n");
1413                 return -EINVAL;
1414         }
1415         se_tpg = &tpg->se_tpg;
1416
1417         se_sess = transport_init_session();
1418         if (IS_ERR(se_sess)) {
1419                 pr_err("Unable to initialize struct se_session\n");
1420                 return PTR_ERR(se_sess);
1421         }
1422         /*
1423          * Format the FCP Initiator port_name into colon seperated values to
1424          * match the format by tcm_qla2xxx explict ConfigFS NodeACLs.
1425          */
1426         memset(&port_name, 0, 36);
1427         snprintf(port_name, 36, "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
1428                 fc_wwpn[0], fc_wwpn[1], fc_wwpn[2], fc_wwpn[3], fc_wwpn[4],
1429                 fc_wwpn[5], fc_wwpn[6], fc_wwpn[7]);
1430         /*
1431          * Locate our struct se_node_acl either from an explict NodeACL created
1432          * via ConfigFS, or via running in TPG demo mode.
1433          */
1434         se_sess->se_node_acl = core_tpg_check_initiator_node_acl(se_tpg,
1435                                         port_name);
1436         if (!se_sess->se_node_acl) {
1437                 transport_free_session(se_sess);
1438                 return -EINVAL;
1439         }
1440         se_nacl = se_sess->se_node_acl;
1441         nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl);
1442         /*
1443          * And now setup the new se_nacl and session pointers into our HW lport
1444          * mappings for fabric S_ID and LOOP_ID.
1445          */
1446         spin_lock_irqsave(&ha->hardware_lock, flags);
1447         tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess,
1448                         qla_tgt_sess, s_id);
1449         tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl, se_sess,
1450                         qla_tgt_sess, loop_id);
1451         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1452         /*
1453          * Finally register the new FC Nexus with TCM
1454          */
1455         __transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess);
1456
1457         return 0;
1458 }
1459
1460 static void tcm_qla2xxx_update_sess(struct qla_tgt_sess *sess, port_id_t s_id,
1461                                     uint16_t loop_id, bool conf_compl_supported)
1462 {
1463         struct qla_tgt *tgt = sess->tgt;
1464         struct qla_hw_data *ha = tgt->ha;
1465         struct tcm_qla2xxx_lport *lport = ha->tgt.target_lport_ptr;
1466         struct se_node_acl *se_nacl = sess->se_sess->se_node_acl;
1467         struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl,
1468                         struct tcm_qla2xxx_nacl, se_node_acl);
1469         u32 key;
1470
1471
1472         if (sess->loop_id != loop_id || sess->s_id.b24 != s_id.b24)
1473                 pr_info("Updating session %p from port %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n",
1474                         sess,
1475                         sess->port_name[0], sess->port_name[1],
1476                         sess->port_name[2], sess->port_name[3],
1477                         sess->port_name[4], sess->port_name[5],
1478                         sess->port_name[6], sess->port_name[7],
1479                         sess->loop_id, loop_id,
1480                         sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa,
1481                         s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1482
1483         if (sess->loop_id != loop_id) {
1484                 /*
1485                  * Because we can shuffle loop IDs around and we
1486                  * update different sessions non-atomically, we might
1487                  * have overwritten this session's old loop ID
1488                  * already, and we might end up overwriting some other
1489                  * session that will be updated later.  So we have to
1490                  * be extra careful and we can't warn about those things...
1491                  */
1492                 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl)
1493                         lport->lport_loopid_map[sess->loop_id].se_nacl = NULL;
1494
1495                 lport->lport_loopid_map[loop_id].se_nacl = se_nacl;
1496
1497                 sess->loop_id = loop_id;
1498         }
1499
1500         if (sess->s_id.b24 != s_id.b24) {
1501                 key = (((u32) sess->s_id.b.domain << 16) |
1502                        ((u32) sess->s_id.b.area   <<  8) |
1503                        ((u32) sess->s_id.b.al_pa));
1504
1505                 if (btree_lookup32(&lport->lport_fcport_map, key))
1506                         WARN(btree_remove32(&lport->lport_fcport_map, key) != se_nacl,
1507                              "Found wrong se_nacl when updating s_id %x:%x:%x\n",
1508                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1509                 else
1510                         WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n",
1511                              sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa);
1512
1513                 key = (((u32) s_id.b.domain << 16) |
1514                        ((u32) s_id.b.area   <<  8) |
1515                        ((u32) s_id.b.al_pa));
1516
1517                 if (btree_lookup32(&lport->lport_fcport_map, key)) {
1518                         WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n",
1519                              s_id.b.domain, s_id.b.area, s_id.b.al_pa);
1520                         btree_update32(&lport->lport_fcport_map, key, se_nacl);
1521                 } else {
1522                         btree_insert32(&lport->lport_fcport_map, key, se_nacl, GFP_ATOMIC);
1523                 }
1524
1525                 sess->s_id = s_id;
1526                 nacl->nport_id = key;
1527         }
1528
1529         sess->conf_compl_supported = conf_compl_supported;
1530 }
1531
1532 /*
1533  * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path.
1534  */
1535 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = {
1536         .handle_cmd             = tcm_qla2xxx_handle_cmd,
1537         .handle_data            = tcm_qla2xxx_handle_data,
1538         .handle_tmr             = tcm_qla2xxx_handle_tmr,
1539         .free_cmd               = tcm_qla2xxx_free_cmd,
1540         .free_mcmd              = tcm_qla2xxx_free_mcmd,
1541         .free_session           = tcm_qla2xxx_free_session,
1542         .update_sess            = tcm_qla2xxx_update_sess,
1543         .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl,
1544         .find_sess_by_s_id      = tcm_qla2xxx_find_sess_by_s_id,
1545         .find_sess_by_loop_id   = tcm_qla2xxx_find_sess_by_loop_id,
1546         .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map,
1547         .put_sess               = tcm_qla2xxx_put_sess,
1548         .shutdown_sess          = tcm_qla2xxx_shutdown_sess,
1549 };
1550
1551 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport)
1552 {
1553         int rc;
1554
1555         rc = btree_init32(&lport->lport_fcport_map);
1556         if (rc) {
1557                 pr_err("Unable to initialize lport->lport_fcport_map btree\n");
1558                 return rc;
1559         }
1560
1561         lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) *
1562                                 65536);
1563         if (!lport->lport_loopid_map) {
1564                 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n",
1565                     sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1566                 btree_destroy32(&lport->lport_fcport_map);
1567                 return -ENOMEM;
1568         }
1569         memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid)
1570                * 65536);
1571         pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n",
1572                sizeof(struct tcm_qla2xxx_fc_loopid) * 65536);
1573         return 0;
1574 }
1575
1576 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha)
1577 {
1578         struct qla_hw_data *ha = vha->hw;
1579         struct tcm_qla2xxx_lport *lport;
1580         /*
1581          * Setup local pointer to vha, NPIV VP pointer (if present) and
1582          * vha->tcm_lport pointer
1583          */
1584         lport = (struct tcm_qla2xxx_lport *)ha->tgt.target_lport_ptr;
1585         lport->qla_vha = vha;
1586
1587         return 0;
1588 }
1589
1590 static struct se_wwn *tcm_qla2xxx_make_lport(
1591         struct target_fabric_configfs *tf,
1592         struct config_group *group,
1593         const char *name)
1594 {
1595         struct tcm_qla2xxx_lport *lport;
1596         u64 wwpn;
1597         int ret = -ENODEV;
1598
1599         if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0)
1600                 return ERR_PTR(-EINVAL);
1601
1602         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1603         if (!lport) {
1604                 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n");
1605                 return ERR_PTR(-ENOMEM);
1606         }
1607         lport->lport_wwpn = wwpn;
1608         tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN,
1609                                 wwpn);
1610         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn);
1611
1612         ret = tcm_qla2xxx_init_lport(lport);
1613         if (ret != 0)
1614                 goto out;
1615
1616         ret = qlt_lport_register(&tcm_qla2xxx_template, wwpn,
1617                                 tcm_qla2xxx_lport_register_cb, lport);
1618         if (ret != 0)
1619                 goto out_lport;
1620
1621         return &lport->lport_wwn;
1622 out_lport:
1623         vfree(lport->lport_loopid_map);
1624         btree_destroy32(&lport->lport_fcport_map);
1625 out:
1626         kfree(lport);
1627         return ERR_PTR(ret);
1628 }
1629
1630 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn)
1631 {
1632         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1633                         struct tcm_qla2xxx_lport, lport_wwn);
1634         struct scsi_qla_host *vha = lport->qla_vha;
1635         struct qla_hw_data *ha = vha->hw;
1636         struct se_node_acl *node;
1637         u32 key = 0;
1638
1639         /*
1640          * Call into qla2x_target.c LLD logic to complete the
1641          * shutdown of struct qla_tgt after the call to
1642          * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above..
1643          */
1644         if (ha->tgt.qla_tgt && !ha->tgt.qla_tgt->tgt_stopped)
1645                 qlt_stop_phase2(ha->tgt.qla_tgt);
1646
1647         qlt_lport_deregister(vha);
1648
1649         vfree(lport->lport_loopid_map);
1650         btree_for_each_safe32(&lport->lport_fcport_map, key, node)
1651                 btree_remove32(&lport->lport_fcport_map, key);
1652         btree_destroy32(&lport->lport_fcport_map);
1653         kfree(lport);
1654 }
1655
1656 static struct se_wwn *tcm_qla2xxx_npiv_make_lport(
1657         struct target_fabric_configfs *tf,
1658         struct config_group *group,
1659         const char *name)
1660 {
1661         struct tcm_qla2xxx_lport *lport;
1662         u64 npiv_wwpn, npiv_wwnn;
1663         int ret;
1664
1665         if (tcm_qla2xxx_npiv_parse_wwn(name, strlen(name)+1,
1666                                 &npiv_wwpn, &npiv_wwnn) < 0)
1667                 return ERR_PTR(-EINVAL);
1668
1669         lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL);
1670         if (!lport) {
1671                 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n");
1672                 return ERR_PTR(-ENOMEM);
1673         }
1674         lport->lport_npiv_wwpn = npiv_wwpn;
1675         lport->lport_npiv_wwnn = npiv_wwnn;
1676         tcm_qla2xxx_npiv_format_wwn(&lport->lport_npiv_name[0],
1677                         TCM_QLA2XXX_NAMELEN, npiv_wwpn, npiv_wwnn);
1678         sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn);
1679
1680 /* FIXME: tcm_qla2xxx_npiv_make_lport */
1681         ret = -ENOSYS;
1682         if (ret != 0)
1683                 goto out;
1684
1685         return &lport->lport_wwn;
1686 out:
1687         kfree(lport);
1688         return ERR_PTR(ret);
1689 }
1690
1691 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn)
1692 {
1693         struct tcm_qla2xxx_lport *lport = container_of(wwn,
1694                         struct tcm_qla2xxx_lport, lport_wwn);
1695         struct scsi_qla_host *vha = lport->qla_vha;
1696         struct Scsi_Host *sh = vha->host;
1697         /*
1698          * Notify libfc that we want to release the lport->npiv_vport
1699          */
1700         fc_vport_terminate(lport->npiv_vport);
1701
1702         scsi_host_put(sh);
1703         kfree(lport);
1704 }
1705
1706
1707 static ssize_t tcm_qla2xxx_wwn_show_attr_version(
1708         struct target_fabric_configfs *tf,
1709         char *page)
1710 {
1711         return sprintf(page,
1712             "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on "
1713             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1714             utsname()->machine);
1715 }
1716
1717 TF_WWN_ATTR_RO(tcm_qla2xxx, version);
1718
1719 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = {
1720         &tcm_qla2xxx_wwn_version.attr,
1721         NULL,
1722 };
1723
1724 static struct target_core_fabric_ops tcm_qla2xxx_ops = {
1725         .get_fabric_name                = tcm_qla2xxx_get_fabric_name,
1726         .get_fabric_proto_ident         = tcm_qla2xxx_get_fabric_proto_ident,
1727         .tpg_get_wwn                    = tcm_qla2xxx_get_fabric_wwn,
1728         .tpg_get_tag                    = tcm_qla2xxx_get_tag,
1729         .tpg_get_default_depth          = tcm_qla2xxx_get_default_depth,
1730         .tpg_get_pr_transport_id        = tcm_qla2xxx_get_pr_transport_id,
1731         .tpg_get_pr_transport_id_len    = tcm_qla2xxx_get_pr_transport_id_len,
1732         .tpg_parse_pr_out_transport_id  = tcm_qla2xxx_parse_pr_out_transport_id,
1733         .tpg_check_demo_mode            = tcm_qla2xxx_check_demo_mode,
1734         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_demo_mode_cache,
1735         .tpg_check_demo_mode_write_protect =
1736                                         tcm_qla2xxx_check_demo_write_protect,
1737         .tpg_check_prod_mode_write_protect =
1738                                         tcm_qla2xxx_check_prod_write_protect,
1739         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_true,
1740         .tpg_alloc_fabric_acl           = tcm_qla2xxx_alloc_fabric_acl,
1741         .tpg_release_fabric_acl         = tcm_qla2xxx_release_fabric_acl,
1742         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1743         .check_stop_free                = tcm_qla2xxx_check_stop_free,
1744         .release_cmd                    = tcm_qla2xxx_release_cmd,
1745         .put_session                    = tcm_qla2xxx_put_session,
1746         .shutdown_session               = tcm_qla2xxx_shutdown_session,
1747         .close_session                  = tcm_qla2xxx_close_session,
1748         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1749         .sess_get_initiator_sid         = NULL,
1750         .write_pending                  = tcm_qla2xxx_write_pending,
1751         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1752         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1753         .get_task_tag                   = tcm_qla2xxx_get_task_tag,
1754         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1755         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1756         .queue_status                   = tcm_qla2xxx_queue_status,
1757         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1758         /*
1759          * Setup function pointers for generic logic in
1760          * target_core_fabric_configfs.c
1761          */
1762         .fabric_make_wwn                = tcm_qla2xxx_make_lport,
1763         .fabric_drop_wwn                = tcm_qla2xxx_drop_lport,
1764         .fabric_make_tpg                = tcm_qla2xxx_make_tpg,
1765         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1766         .fabric_post_link               = NULL,
1767         .fabric_pre_unlink              = NULL,
1768         .fabric_make_np                 = NULL,
1769         .fabric_drop_np                 = NULL,
1770         .fabric_make_nodeacl            = tcm_qla2xxx_make_nodeacl,
1771         .fabric_drop_nodeacl            = tcm_qla2xxx_drop_nodeacl,
1772 };
1773
1774 static struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = {
1775         .get_fabric_name                = tcm_qla2xxx_npiv_get_fabric_name,
1776         .get_fabric_proto_ident         = tcm_qla2xxx_get_fabric_proto_ident,
1777         .tpg_get_wwn                    = tcm_qla2xxx_npiv_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_false,
1784         .tpg_check_demo_mode_cache      = tcm_qla2xxx_check_true,
1785         .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_true,
1786         .tpg_check_prod_mode_write_protect = tcm_qla2xxx_check_false,
1787         .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_true,
1788         .tpg_alloc_fabric_acl           = tcm_qla2xxx_alloc_fabric_acl,
1789         .tpg_release_fabric_acl         = tcm_qla2xxx_release_fabric_acl,
1790         .tpg_get_inst_index             = tcm_qla2xxx_tpg_get_inst_index,
1791         .release_cmd                    = tcm_qla2xxx_release_cmd,
1792         .put_session                    = tcm_qla2xxx_put_session,
1793         .shutdown_session               = tcm_qla2xxx_shutdown_session,
1794         .close_session                  = tcm_qla2xxx_close_session,
1795         .sess_get_index                 = tcm_qla2xxx_sess_get_index,
1796         .sess_get_initiator_sid         = NULL,
1797         .write_pending                  = tcm_qla2xxx_write_pending,
1798         .write_pending_status           = tcm_qla2xxx_write_pending_status,
1799         .set_default_node_attributes    = tcm_qla2xxx_set_default_node_attrs,
1800         .get_task_tag                   = tcm_qla2xxx_get_task_tag,
1801         .get_cmd_state                  = tcm_qla2xxx_get_cmd_state,
1802         .queue_data_in                  = tcm_qla2xxx_queue_data_in,
1803         .queue_status                   = tcm_qla2xxx_queue_status,
1804         .queue_tm_rsp                   = tcm_qla2xxx_queue_tm_rsp,
1805         /*
1806          * Setup function pointers for generic logic in
1807          * target_core_fabric_configfs.c
1808          */
1809         .fabric_make_wwn                = tcm_qla2xxx_npiv_make_lport,
1810         .fabric_drop_wwn                = tcm_qla2xxx_npiv_drop_lport,
1811         .fabric_make_tpg                = tcm_qla2xxx_npiv_make_tpg,
1812         .fabric_drop_tpg                = tcm_qla2xxx_drop_tpg,
1813         .fabric_post_link               = NULL,
1814         .fabric_pre_unlink              = NULL,
1815         .fabric_make_np                 = NULL,
1816         .fabric_drop_np                 = NULL,
1817         .fabric_make_nodeacl            = tcm_qla2xxx_make_nodeacl,
1818         .fabric_drop_nodeacl            = tcm_qla2xxx_drop_nodeacl,
1819 };
1820
1821 static int tcm_qla2xxx_register_configfs(void)
1822 {
1823         struct target_fabric_configfs *fabric, *npiv_fabric;
1824         int ret;
1825
1826         pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on "
1827             UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname,
1828             utsname()->machine);
1829         /*
1830          * Register the top level struct config_item_type with TCM core
1831          */
1832         fabric = target_fabric_configfs_init(THIS_MODULE, "qla2xxx");
1833         if (IS_ERR(fabric)) {
1834                 pr_err("target_fabric_configfs_init() failed\n");
1835                 return PTR_ERR(fabric);
1836         }
1837         /*
1838          * Setup fabric->tf_ops from our local tcm_qla2xxx_ops
1839          */
1840         fabric->tf_ops = tcm_qla2xxx_ops;
1841         /*
1842          * Setup default attribute lists for various fabric->tf_cit_tmpl
1843          */
1844         TF_CIT_TMPL(fabric)->tfc_wwn_cit.ct_attrs = tcm_qla2xxx_wwn_attrs;
1845         TF_CIT_TMPL(fabric)->tfc_tpg_base_cit.ct_attrs = tcm_qla2xxx_tpg_attrs;
1846         TF_CIT_TMPL(fabric)->tfc_tpg_attrib_cit.ct_attrs =
1847                                                 tcm_qla2xxx_tpg_attrib_attrs;
1848         TF_CIT_TMPL(fabric)->tfc_tpg_param_cit.ct_attrs = NULL;
1849         TF_CIT_TMPL(fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;
1850         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL;
1851         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
1852         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
1853         TF_CIT_TMPL(fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL;
1854         /*
1855          * Register the fabric for use within TCM
1856          */
1857         ret = target_fabric_configfs_register(fabric);
1858         if (ret < 0) {
1859                 pr_err("target_fabric_configfs_register() failed for TCM_QLA2XXX\n");
1860                 return ret;
1861         }
1862         /*
1863          * Setup our local pointer to *fabric
1864          */
1865         tcm_qla2xxx_fabric_configfs = fabric;
1866         pr_debug("TCM_QLA2XXX[0] - Set fabric -> tcm_qla2xxx_fabric_configfs\n");
1867
1868         /*
1869          * Register the top level struct config_item_type for NPIV with TCM core
1870          */
1871         npiv_fabric = target_fabric_configfs_init(THIS_MODULE, "qla2xxx_npiv");
1872         if (IS_ERR(npiv_fabric)) {
1873                 pr_err("target_fabric_configfs_init() failed\n");
1874                 ret = PTR_ERR(npiv_fabric);
1875                 goto out_fabric;
1876         }
1877         /*
1878          * Setup fabric->tf_ops from our local tcm_qla2xxx_npiv_ops
1879          */
1880         npiv_fabric->tf_ops = tcm_qla2xxx_npiv_ops;
1881         /*
1882          * Setup default attribute lists for various npiv_fabric->tf_cit_tmpl
1883          */
1884         TF_CIT_TMPL(npiv_fabric)->tfc_wwn_cit.ct_attrs = tcm_qla2xxx_wwn_attrs;
1885         TF_CIT_TMPL(npiv_fabric)->tfc_tpg_base_cit.ct_attrs = NULL;
1886         TF_CIT_TMPL(npiv_fabric)->tfc_tpg_attrib_cit.ct_attrs = NULL;
1887         TF_CIT_TMPL(npiv_fabric)->tfc_tpg_param_cit.ct_attrs = NULL;
1888         TF_CIT_TMPL(npiv_fabric)->tfc_tpg_np_base_cit.ct_attrs = NULL;
1889         TF_CIT_TMPL(npiv_fabric)->tfc_tpg_nacl_base_cit.ct_attrs = NULL;
1890         TF_CIT_TMPL(npiv_fabric)->tfc_tpg_nacl_attrib_cit.ct_attrs = NULL;
1891         TF_CIT_TMPL(npiv_fabric)->tfc_tpg_nacl_auth_cit.ct_attrs = NULL;
1892         TF_CIT_TMPL(npiv_fabric)->tfc_tpg_nacl_param_cit.ct_attrs = NULL;
1893         /*
1894          * Register the npiv_fabric for use within TCM
1895          */
1896         ret = target_fabric_configfs_register(npiv_fabric);
1897         if (ret < 0) {
1898                 pr_err("target_fabric_configfs_register() failed for TCM_QLA2XXX\n");
1899                 goto out_fabric;
1900         }
1901         /*
1902          * Setup our local pointer to *npiv_fabric
1903          */
1904         tcm_qla2xxx_npiv_fabric_configfs = npiv_fabric;
1905         pr_debug("TCM_QLA2XXX[0] - Set fabric -> tcm_qla2xxx_npiv_fabric_configfs\n");
1906
1907         tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free",
1908                                                 WQ_MEM_RECLAIM, 0);
1909         if (!tcm_qla2xxx_free_wq) {
1910                 ret = -ENOMEM;
1911                 goto out_fabric_npiv;
1912         }
1913
1914         tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0);
1915         if (!tcm_qla2xxx_cmd_wq) {
1916                 ret = -ENOMEM;
1917                 goto out_free_wq;
1918         }
1919
1920         return 0;
1921
1922 out_free_wq:
1923         destroy_workqueue(tcm_qla2xxx_free_wq);
1924 out_fabric_npiv:
1925         target_fabric_configfs_deregister(tcm_qla2xxx_npiv_fabric_configfs);
1926 out_fabric:
1927         target_fabric_configfs_deregister(tcm_qla2xxx_fabric_configfs);
1928         return ret;
1929 }
1930
1931 static void tcm_qla2xxx_deregister_configfs(void)
1932 {
1933         destroy_workqueue(tcm_qla2xxx_cmd_wq);
1934         destroy_workqueue(tcm_qla2xxx_free_wq);
1935
1936         target_fabric_configfs_deregister(tcm_qla2xxx_fabric_configfs);
1937         tcm_qla2xxx_fabric_configfs = NULL;
1938         pr_debug("TCM_QLA2XXX[0] - Cleared tcm_qla2xxx_fabric_configfs\n");
1939
1940         target_fabric_configfs_deregister(tcm_qla2xxx_npiv_fabric_configfs);
1941         tcm_qla2xxx_npiv_fabric_configfs = NULL;
1942         pr_debug("TCM_QLA2XXX[0] - Cleared tcm_qla2xxx_npiv_fabric_configfs\n");
1943 }
1944
1945 static int __init tcm_qla2xxx_init(void)
1946 {
1947         int ret;
1948
1949         ret = tcm_qla2xxx_register_configfs();
1950         if (ret < 0)
1951                 return ret;
1952
1953         return 0;
1954 }
1955
1956 static void __exit tcm_qla2xxx_exit(void)
1957 {
1958         tcm_qla2xxx_deregister_configfs();
1959 }
1960
1961 MODULE_DESCRIPTION("TCM QLA2XXX series NPIV enabled fabric driver");
1962 MODULE_LICENSE("GPL");
1963 module_init(tcm_qla2xxx_init);
1964 module_exit(tcm_qla2xxx_exit);