1 /******************************************************************************* 2 * This file contains tcm implementation using v4 configfs fabric infrastructure 3 * for QLogic target mode HBAs 4 * 5 * (c) Copyright 2010-2013 Datera, Inc. 6 * 7 * Author: Nicholas A. Bellinger <nab@daterainc.com> 8 * 9 * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from 10 * the TCM_FC / Open-FCoE.org fabric module. 11 * 12 * Copyright (c) 2010 Cisco Systems, Inc 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2 of the License, or 17 * (at your option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 ****************************************************************************/ 24 25 26 #include <linux/module.h> 27 #include <linux/moduleparam.h> 28 #include <generated/utsrelease.h> 29 #include <linux/utsname.h> 30 #include <linux/vmalloc.h> 31 #include <linux/init.h> 32 #include <linux/list.h> 33 #include <linux/slab.h> 34 #include <linux/kthread.h> 35 #include <linux/types.h> 36 #include <linux/string.h> 37 #include <linux/configfs.h> 38 #include <linux/ctype.h> 39 #include <asm/unaligned.h> 40 #include <scsi/scsi.h> 41 #include <scsi/scsi_host.h> 42 #include <scsi/scsi_device.h> 43 #include <scsi/scsi_cmnd.h> 44 #include <target/target_core_base.h> 45 #include <target/target_core_fabric.h> 46 47 #include "qla_def.h" 48 #include "qla_target.h" 49 #include "tcm_qla2xxx.h" 50 51 static struct workqueue_struct *tcm_qla2xxx_free_wq; 52 static struct workqueue_struct *tcm_qla2xxx_cmd_wq; 53 54 /* 55 * Parse WWN. 56 * If strict, we require lower-case hex and colon separators to be sure 57 * the name is the same as what would be generated by ft_format_wwn() 58 * so the name and wwn are mapped one-to-one. 59 */ 60 static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict) 61 { 62 const char *cp; 63 char c; 64 u32 nibble; 65 u32 byte = 0; 66 u32 pos = 0; 67 u32 err; 68 69 *wwn = 0; 70 for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) { 71 c = *cp; 72 if (c == '\n' && cp[1] == '\0') 73 continue; 74 if (strict && pos++ == 2 && byte++ < 7) { 75 pos = 0; 76 if (c == ':') 77 continue; 78 err = 1; 79 goto fail; 80 } 81 if (c == '\0') { 82 err = 2; 83 if (strict && byte != 8) 84 goto fail; 85 return cp - name; 86 } 87 err = 3; 88 if (isdigit(c)) 89 nibble = c - '0'; 90 else if (isxdigit(c) && (islower(c) || !strict)) 91 nibble = tolower(c) - 'a' + 10; 92 else 93 goto fail; 94 *wwn = (*wwn << 4) | nibble; 95 } 96 err = 4; 97 fail: 98 pr_debug("err %u len %zu pos %u byte %u\n", 99 err, cp - name, pos, byte); 100 return -1; 101 } 102 103 static ssize_t tcm_qla2xxx_format_wwn(char *buf, size_t len, u64 wwn) 104 { 105 u8 b[8]; 106 107 put_unaligned_be64(wwn, b); 108 return snprintf(buf, len, 109 "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x", 110 b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7]); 111 } 112 113 static char *tcm_qla2xxx_get_fabric_name(void) 114 { 115 return "qla2xxx"; 116 } 117 118 /* 119 * From drivers/scsi/scsi_transport_fc.c:fc_parse_wwn 120 */ 121 static int tcm_qla2xxx_npiv_extract_wwn(const char *ns, u64 *nm) 122 { 123 unsigned int i, j; 124 u8 wwn[8]; 125 126 memset(wwn, 0, sizeof(wwn)); 127 128 /* Validate and store the new name */ 129 for (i = 0, j = 0; i < 16; i++) { 130 int value; 131 132 value = hex_to_bin(*ns++); 133 if (value >= 0) 134 j = (j << 4) | value; 135 else 136 return -EINVAL; 137 138 if (i % 2) { 139 wwn[i/2] = j & 0xff; 140 j = 0; 141 } 142 } 143 144 *nm = wwn_to_u64(wwn); 145 return 0; 146 } 147 148 /* 149 * This parsing logic follows drivers/scsi/scsi_transport_fc.c: 150 * store_fc_host_vport_create() 151 */ 152 static int tcm_qla2xxx_npiv_parse_wwn( 153 const char *name, 154 size_t count, 155 u64 *wwpn, 156 u64 *wwnn) 157 { 158 unsigned int cnt = count; 159 int rc; 160 161 *wwpn = 0; 162 *wwnn = 0; 163 164 /* count may include a LF at end of string */ 165 if (name[cnt-1] == '\n' || name[cnt-1] == 0) 166 cnt--; 167 168 /* validate we have enough characters for WWPN */ 169 if ((cnt != (16+1+16)) || (name[16] != ':')) 170 return -EINVAL; 171 172 rc = tcm_qla2xxx_npiv_extract_wwn(&name[0], wwpn); 173 if (rc != 0) 174 return rc; 175 176 rc = tcm_qla2xxx_npiv_extract_wwn(&name[17], wwnn); 177 if (rc != 0) 178 return rc; 179 180 return 0; 181 } 182 183 static char *tcm_qla2xxx_npiv_get_fabric_name(void) 184 { 185 return "qla2xxx_npiv"; 186 } 187 188 static char *tcm_qla2xxx_get_fabric_wwn(struct se_portal_group *se_tpg) 189 { 190 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 191 struct tcm_qla2xxx_tpg, se_tpg); 192 struct tcm_qla2xxx_lport *lport = tpg->lport; 193 194 return lport->lport_naa_name; 195 } 196 197 static u16 tcm_qla2xxx_get_tag(struct se_portal_group *se_tpg) 198 { 199 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 200 struct tcm_qla2xxx_tpg, se_tpg); 201 return tpg->lport_tpgt; 202 } 203 204 static int tcm_qla2xxx_check_demo_mode(struct se_portal_group *se_tpg) 205 { 206 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 207 struct tcm_qla2xxx_tpg, se_tpg); 208 209 return tpg->tpg_attrib.generate_node_acls; 210 } 211 212 static int tcm_qla2xxx_check_demo_mode_cache(struct se_portal_group *se_tpg) 213 { 214 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 215 struct tcm_qla2xxx_tpg, se_tpg); 216 217 return tpg->tpg_attrib.cache_dynamic_acls; 218 } 219 220 static int tcm_qla2xxx_check_demo_write_protect(struct se_portal_group *se_tpg) 221 { 222 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 223 struct tcm_qla2xxx_tpg, se_tpg); 224 225 return tpg->tpg_attrib.demo_mode_write_protect; 226 } 227 228 static int tcm_qla2xxx_check_prod_write_protect(struct se_portal_group *se_tpg) 229 { 230 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 231 struct tcm_qla2xxx_tpg, se_tpg); 232 233 return tpg->tpg_attrib.prod_mode_write_protect; 234 } 235 236 static int tcm_qla2xxx_check_demo_mode_login_only(struct se_portal_group *se_tpg) 237 { 238 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 239 struct tcm_qla2xxx_tpg, se_tpg); 240 241 return tpg->tpg_attrib.demo_mode_login_only; 242 } 243 244 static int tcm_qla2xxx_check_prot_fabric_only(struct se_portal_group *se_tpg) 245 { 246 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 247 struct tcm_qla2xxx_tpg, se_tpg); 248 249 return tpg->tpg_attrib.fabric_prot_type; 250 } 251 252 static u32 tcm_qla2xxx_tpg_get_inst_index(struct se_portal_group *se_tpg) 253 { 254 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 255 struct tcm_qla2xxx_tpg, se_tpg); 256 257 return tpg->lport_tpgt; 258 } 259 260 static void tcm_qla2xxx_complete_mcmd(struct work_struct *work) 261 { 262 struct qla_tgt_mgmt_cmd *mcmd = container_of(work, 263 struct qla_tgt_mgmt_cmd, free_work); 264 265 transport_generic_free_cmd(&mcmd->se_cmd, 0); 266 } 267 268 /* 269 * Called from qla_target_template->free_mcmd(), and will call 270 * tcm_qla2xxx_release_cmd() via normal struct target_core_fabric_ops 271 * release callback. qla_hw_data->hardware_lock is expected to be held 272 */ 273 static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) 274 { 275 INIT_WORK(&mcmd->free_work, tcm_qla2xxx_complete_mcmd); 276 queue_work(tcm_qla2xxx_free_wq, &mcmd->free_work); 277 } 278 279 static void tcm_qla2xxx_complete_free(struct work_struct *work) 280 { 281 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 282 283 cmd->cmd_in_wq = 0; 284 285 WARN_ON(cmd->cmd_flags & BIT_16); 286 287 cmd->cmd_flags |= BIT_16; 288 transport_generic_free_cmd(&cmd->se_cmd, 0); 289 } 290 291 /* 292 * Called from qla_target_template->free_cmd(), and will call 293 * tcm_qla2xxx_release_cmd via normal struct target_core_fabric_ops 294 * release callback. qla_hw_data->hardware_lock is expected to be held 295 */ 296 static void tcm_qla2xxx_free_cmd(struct qla_tgt_cmd *cmd) 297 { 298 cmd->cmd_in_wq = 1; 299 INIT_WORK(&cmd->work, tcm_qla2xxx_complete_free); 300 queue_work(tcm_qla2xxx_free_wq, &cmd->work); 301 } 302 303 /* 304 * Called from struct target_core_fabric_ops->check_stop_free() context 305 */ 306 static int tcm_qla2xxx_check_stop_free(struct se_cmd *se_cmd) 307 { 308 struct qla_tgt_cmd *cmd; 309 310 if ((se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) == 0) { 311 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd); 312 cmd->cmd_flags |= BIT_14; 313 } 314 315 return target_put_sess_cmd(se_cmd); 316 } 317 318 /* tcm_qla2xxx_release_cmd - Callback from TCM Core to release underlying 319 * fabric descriptor @se_cmd command to release 320 */ 321 static void tcm_qla2xxx_release_cmd(struct se_cmd *se_cmd) 322 { 323 struct qla_tgt_cmd *cmd; 324 325 if (se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB) { 326 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd, 327 struct qla_tgt_mgmt_cmd, se_cmd); 328 qlt_free_mcmd(mcmd); 329 return; 330 } 331 332 cmd = container_of(se_cmd, struct qla_tgt_cmd, se_cmd); 333 qlt_free_cmd(cmd); 334 } 335 336 static int tcm_qla2xxx_shutdown_session(struct se_session *se_sess) 337 { 338 struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr; 339 struct scsi_qla_host *vha; 340 unsigned long flags; 341 342 BUG_ON(!sess); 343 vha = sess->vha; 344 345 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 346 target_sess_cmd_list_set_waiting(se_sess); 347 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 348 349 return 1; 350 } 351 352 static void tcm_qla2xxx_close_session(struct se_session *se_sess) 353 { 354 struct qla_tgt_sess *sess = se_sess->fabric_sess_ptr; 355 struct scsi_qla_host *vha; 356 unsigned long flags; 357 358 BUG_ON(!sess); 359 vha = sess->vha; 360 361 spin_lock_irqsave(&vha->hw->hardware_lock, flags); 362 qlt_unreg_sess(sess); 363 spin_unlock_irqrestore(&vha->hw->hardware_lock, flags); 364 } 365 366 static u32 tcm_qla2xxx_sess_get_index(struct se_session *se_sess) 367 { 368 return 0; 369 } 370 371 static int tcm_qla2xxx_write_pending(struct se_cmd *se_cmd) 372 { 373 struct qla_tgt_cmd *cmd = container_of(se_cmd, 374 struct qla_tgt_cmd, se_cmd); 375 cmd->cmd_flags |= BIT_3; 376 cmd->bufflen = se_cmd->data_length; 377 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd); 378 379 cmd->sg_cnt = se_cmd->t_data_nents; 380 cmd->sg = se_cmd->t_data_sg; 381 382 cmd->prot_sg_cnt = se_cmd->t_prot_nents; 383 cmd->prot_sg = se_cmd->t_prot_sg; 384 cmd->blk_sz = se_cmd->se_dev->dev_attrib.block_size; 385 se_cmd->pi_err = 0; 386 387 /* 388 * qla_target.c:qlt_rdy_to_xfer() will call pci_map_sg() to setup 389 * the SGL mappings into PCIe memory for incoming FCP WRITE data. 390 */ 391 return qlt_rdy_to_xfer(cmd); 392 } 393 394 static int tcm_qla2xxx_write_pending_status(struct se_cmd *se_cmd) 395 { 396 unsigned long flags; 397 /* 398 * Check for WRITE_PENDING status to determine if we need to wait for 399 * CTIO aborts to be posted via hardware in tcm_qla2xxx_handle_data(). 400 */ 401 spin_lock_irqsave(&se_cmd->t_state_lock, flags); 402 if (se_cmd->t_state == TRANSPORT_WRITE_PENDING || 403 se_cmd->t_state == TRANSPORT_COMPLETE_QF_WP) { 404 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); 405 wait_for_completion_timeout(&se_cmd->t_transport_stop_comp, 406 3 * HZ); 407 return 0; 408 } 409 spin_unlock_irqrestore(&se_cmd->t_state_lock, flags); 410 411 return 0; 412 } 413 414 static void tcm_qla2xxx_set_default_node_attrs(struct se_node_acl *nacl) 415 { 416 return; 417 } 418 419 static int tcm_qla2xxx_get_cmd_state(struct se_cmd *se_cmd) 420 { 421 if (!(se_cmd->se_cmd_flags & SCF_SCSI_TMR_CDB)) { 422 struct qla_tgt_cmd *cmd = container_of(se_cmd, 423 struct qla_tgt_cmd, se_cmd); 424 return cmd->state; 425 } 426 427 return 0; 428 } 429 430 /* 431 * Called from process context in qla_target.c:qlt_do_work() code 432 */ 433 static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd, 434 unsigned char *cdb, uint32_t data_length, int fcp_task_attr, 435 int data_dir, int bidi) 436 { 437 struct se_cmd *se_cmd = &cmd->se_cmd; 438 struct se_session *se_sess; 439 struct qla_tgt_sess *sess; 440 int flags = TARGET_SCF_ACK_KREF; 441 442 if (bidi) 443 flags |= TARGET_SCF_BIDI_OP; 444 445 sess = cmd->sess; 446 if (!sess) { 447 pr_err("Unable to locate struct qla_tgt_sess from qla_tgt_cmd\n"); 448 return -EINVAL; 449 } 450 451 se_sess = sess->se_sess; 452 if (!se_sess) { 453 pr_err("Unable to locate active struct se_session\n"); 454 return -EINVAL; 455 } 456 457 return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0], 458 cmd->unpacked_lun, data_length, fcp_task_attr, 459 data_dir, flags); 460 } 461 462 static void tcm_qla2xxx_handle_data_work(struct work_struct *work) 463 { 464 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 465 466 /* 467 * Ensure that the complete FCP WRITE payload has been received. 468 * Otherwise return an exception via CHECK_CONDITION status. 469 */ 470 cmd->cmd_in_wq = 0; 471 cmd->cmd_flags |= BIT_11; 472 if (!cmd->write_data_transferred) { 473 /* 474 * Check if se_cmd has already been aborted via LUN_RESET, and 475 * waiting upon completion in tcm_qla2xxx_write_pending_status() 476 */ 477 if (cmd->se_cmd.transport_state & CMD_T_ABORTED) { 478 complete(&cmd->se_cmd.t_transport_stop_comp); 479 return; 480 } 481 482 if (cmd->se_cmd.pi_err) 483 transport_generic_request_failure(&cmd->se_cmd, 484 cmd->se_cmd.pi_err); 485 else 486 transport_generic_request_failure(&cmd->se_cmd, 487 TCM_CHECK_CONDITION_ABORT_CMD); 488 489 return; 490 } 491 492 return target_execute_cmd(&cmd->se_cmd); 493 } 494 495 /* 496 * Called from qla_target.c:qlt_do_ctio_completion() 497 */ 498 static void tcm_qla2xxx_handle_data(struct qla_tgt_cmd *cmd) 499 { 500 cmd->cmd_flags |= BIT_10; 501 cmd->cmd_in_wq = 1; 502 INIT_WORK(&cmd->work, tcm_qla2xxx_handle_data_work); 503 queue_work(tcm_qla2xxx_free_wq, &cmd->work); 504 } 505 506 static void tcm_qla2xxx_handle_dif_work(struct work_struct *work) 507 { 508 struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); 509 510 /* take an extra kref to prevent cmd free too early. 511 * need to wait for SCSI status/check condition to 512 * finish responding generate by transport_generic_request_failure. 513 */ 514 kref_get(&cmd->se_cmd.cmd_kref); 515 transport_generic_request_failure(&cmd->se_cmd, cmd->se_cmd.pi_err); 516 } 517 518 /* 519 * Called from qla_target.c:qlt_do_ctio_completion() 520 */ 521 static void tcm_qla2xxx_handle_dif_err(struct qla_tgt_cmd *cmd) 522 { 523 INIT_WORK(&cmd->work, tcm_qla2xxx_handle_dif_work); 524 queue_work(tcm_qla2xxx_free_wq, &cmd->work); 525 } 526 527 /* 528 * Called from qla_target.c:qlt_issue_task_mgmt() 529 */ 530 static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, uint32_t lun, 531 uint8_t tmr_func, uint32_t tag) 532 { 533 struct qla_tgt_sess *sess = mcmd->sess; 534 struct se_cmd *se_cmd = &mcmd->se_cmd; 535 536 return target_submit_tmr(se_cmd, sess->se_sess, NULL, lun, mcmd, 537 tmr_func, GFP_ATOMIC, tag, TARGET_SCF_ACK_KREF); 538 } 539 540 static int tcm_qla2xxx_queue_data_in(struct se_cmd *se_cmd) 541 { 542 struct qla_tgt_cmd *cmd = container_of(se_cmd, 543 struct qla_tgt_cmd, se_cmd); 544 545 cmd->cmd_flags |= BIT_4; 546 cmd->bufflen = se_cmd->data_length; 547 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd); 548 549 cmd->sg_cnt = se_cmd->t_data_nents; 550 cmd->sg = se_cmd->t_data_sg; 551 cmd->offset = 0; 552 553 cmd->prot_sg_cnt = se_cmd->t_prot_nents; 554 cmd->prot_sg = se_cmd->t_prot_sg; 555 cmd->blk_sz = se_cmd->se_dev->dev_attrib.block_size; 556 se_cmd->pi_err = 0; 557 558 /* 559 * Now queue completed DATA_IN the qla2xxx LLD and response ring 560 */ 561 return qlt_xmit_response(cmd, QLA_TGT_XMIT_DATA|QLA_TGT_XMIT_STATUS, 562 se_cmd->scsi_status); 563 } 564 565 static int tcm_qla2xxx_queue_status(struct se_cmd *se_cmd) 566 { 567 struct qla_tgt_cmd *cmd = container_of(se_cmd, 568 struct qla_tgt_cmd, se_cmd); 569 int xmit_type = QLA_TGT_XMIT_STATUS; 570 571 cmd->bufflen = se_cmd->data_length; 572 cmd->sg = NULL; 573 cmd->sg_cnt = 0; 574 cmd->offset = 0; 575 cmd->dma_data_direction = target_reverse_dma_direction(se_cmd); 576 if (cmd->cmd_flags & BIT_5) { 577 pr_crit("Bit_5 already set for cmd = %p.\n", cmd); 578 dump_stack(); 579 } 580 cmd->cmd_flags |= BIT_5; 581 582 if (se_cmd->data_direction == DMA_FROM_DEVICE) { 583 /* 584 * For FCP_READ with CHECK_CONDITION status, clear cmd->bufflen 585 * for qla_tgt_xmit_response LLD code 586 */ 587 if (se_cmd->se_cmd_flags & SCF_OVERFLOW_BIT) { 588 se_cmd->se_cmd_flags &= ~SCF_OVERFLOW_BIT; 589 se_cmd->residual_count = 0; 590 } 591 se_cmd->se_cmd_flags |= SCF_UNDERFLOW_BIT; 592 se_cmd->residual_count += se_cmd->data_length; 593 594 cmd->bufflen = 0; 595 } 596 /* 597 * Now queue status response to qla2xxx LLD code and response ring 598 */ 599 return qlt_xmit_response(cmd, xmit_type, se_cmd->scsi_status); 600 } 601 602 static void tcm_qla2xxx_queue_tm_rsp(struct se_cmd *se_cmd) 603 { 604 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req; 605 struct qla_tgt_mgmt_cmd *mcmd = container_of(se_cmd, 606 struct qla_tgt_mgmt_cmd, se_cmd); 607 608 pr_debug("queue_tm_rsp: mcmd: %p func: 0x%02x response: 0x%02x\n", 609 mcmd, se_tmr->function, se_tmr->response); 610 /* 611 * Do translation between TCM TM response codes and 612 * QLA2xxx FC TM response codes. 613 */ 614 switch (se_tmr->response) { 615 case TMR_FUNCTION_COMPLETE: 616 mcmd->fc_tm_rsp = FC_TM_SUCCESS; 617 break; 618 case TMR_TASK_DOES_NOT_EXIST: 619 mcmd->fc_tm_rsp = FC_TM_BAD_CMD; 620 break; 621 case TMR_FUNCTION_REJECTED: 622 mcmd->fc_tm_rsp = FC_TM_REJECT; 623 break; 624 case TMR_LUN_DOES_NOT_EXIST: 625 default: 626 mcmd->fc_tm_rsp = FC_TM_FAILED; 627 break; 628 } 629 /* 630 * Queue the TM response to QLA2xxx LLD to build a 631 * CTIO response packet. 632 */ 633 qlt_xmit_tm_rsp(mcmd); 634 } 635 636 static void tcm_qla2xxx_aborted_task(struct se_cmd *se_cmd) 637 { 638 struct qla_tgt_cmd *cmd = container_of(se_cmd, 639 struct qla_tgt_cmd, se_cmd); 640 qlt_abort_cmd(cmd); 641 } 642 643 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *, 644 struct tcm_qla2xxx_nacl *, struct qla_tgt_sess *); 645 /* 646 * Expected to be called with struct qla_hw_data->hardware_lock held 647 */ 648 static void tcm_qla2xxx_clear_nacl_from_fcport_map(struct qla_tgt_sess *sess) 649 { 650 struct se_node_acl *se_nacl = sess->se_sess->se_node_acl; 651 struct se_portal_group *se_tpg = se_nacl->se_tpg; 652 struct se_wwn *se_wwn = se_tpg->se_tpg_wwn; 653 struct tcm_qla2xxx_lport *lport = container_of(se_wwn, 654 struct tcm_qla2xxx_lport, lport_wwn); 655 struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl, 656 struct tcm_qla2xxx_nacl, se_node_acl); 657 void *node; 658 659 pr_debug("fc_rport domain: port_id 0x%06x\n", nacl->nport_id); 660 661 node = btree_remove32(&lport->lport_fcport_map, nacl->nport_id); 662 if (WARN_ON(node && (node != se_nacl))) { 663 /* 664 * The nacl no longer matches what we think it should be. 665 * Most likely a new dynamic acl has been added while 666 * someone dropped the hardware lock. It clearly is a 667 * bug elsewhere, but this bit can't make things worse. 668 */ 669 btree_insert32(&lport->lport_fcport_map, nacl->nport_id, 670 node, GFP_ATOMIC); 671 } 672 673 pr_debug("Removed from fcport_map: %p for WWNN: 0x%016LX, port_id: 0x%06x\n", 674 se_nacl, nacl->nport_wwnn, nacl->nport_id); 675 /* 676 * Now clear the se_nacl and session pointers from our HW lport lookup 677 * table mapping for this initiator's fabric S_ID and LOOP_ID entries. 678 * 679 * This is done ahead of callbacks into tcm_qla2xxx_free_session() -> 680 * target_wait_for_sess_cmds() before the session waits for outstanding 681 * I/O to complete, to avoid a race between session shutdown execution 682 * and incoming ATIOs or TMRs picking up a stale se_node_act reference. 683 */ 684 tcm_qla2xxx_clear_sess_lookup(lport, nacl, sess); 685 } 686 687 static void tcm_qla2xxx_release_session(struct kref *kref) 688 { 689 struct se_session *se_sess = container_of(kref, 690 struct se_session, sess_kref); 691 692 qlt_unreg_sess(se_sess->fabric_sess_ptr); 693 } 694 695 static void tcm_qla2xxx_put_sess(struct qla_tgt_sess *sess) 696 { 697 if (!sess) 698 return; 699 700 assert_spin_locked(&sess->vha->hw->hardware_lock); 701 kref_put(&sess->se_sess->sess_kref, tcm_qla2xxx_release_session); 702 } 703 704 static void tcm_qla2xxx_shutdown_sess(struct qla_tgt_sess *sess) 705 { 706 assert_spin_locked(&sess->vha->hw->hardware_lock); 707 target_sess_cmd_list_set_waiting(sess->se_sess); 708 } 709 710 static int tcm_qla2xxx_init_nodeacl(struct se_node_acl *se_nacl, 711 const char *name) 712 { 713 struct tcm_qla2xxx_nacl *nacl = 714 container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl); 715 u64 wwnn; 716 717 if (tcm_qla2xxx_parse_wwn(name, &wwnn, 1) < 0) 718 return -EINVAL; 719 720 nacl->nport_wwnn = wwnn; 721 tcm_qla2xxx_format_wwn(&nacl->nport_name[0], TCM_QLA2XXX_NAMELEN, wwnn); 722 723 return 0; 724 } 725 726 /* Start items for tcm_qla2xxx_tpg_attrib_cit */ 727 728 #define DEF_QLA_TPG_ATTRIB(name) \ 729 \ 730 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_show( \ 731 struct config_item *item, char *page) \ 732 { \ 733 struct se_portal_group *se_tpg = attrib_to_tpg(item); \ 734 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \ 735 struct tcm_qla2xxx_tpg, se_tpg); \ 736 \ 737 return sprintf(page, "%u\n", tpg->tpg_attrib.name); \ 738 } \ 739 \ 740 static ssize_t tcm_qla2xxx_tpg_attrib_##name##_store( \ 741 struct config_item *item, const char *page, size_t count) \ 742 { \ 743 struct se_portal_group *se_tpg = attrib_to_tpg(item); \ 744 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, \ 745 struct tcm_qla2xxx_tpg, se_tpg); \ 746 struct tcm_qla2xxx_tpg_attrib *a = &tpg->tpg_attrib; \ 747 unsigned long val; \ 748 int ret; \ 749 \ 750 ret = kstrtoul(page, 0, &val); \ 751 if (ret < 0) { \ 752 pr_err("kstrtoul() failed with" \ 753 " ret: %d\n", ret); \ 754 return -EINVAL; \ 755 } \ 756 \ 757 if ((val != 0) && (val != 1)) { \ 758 pr_err("Illegal boolean value %lu\n", val); \ 759 return -EINVAL; \ 760 } \ 761 \ 762 a->name = val; \ 763 \ 764 return count; \ 765 } \ 766 CONFIGFS_ATTR(tcm_qla2xxx_tpg_attrib_, name) 767 768 DEF_QLA_TPG_ATTRIB(generate_node_acls); 769 DEF_QLA_TPG_ATTRIB(cache_dynamic_acls); 770 DEF_QLA_TPG_ATTRIB(demo_mode_write_protect); 771 DEF_QLA_TPG_ATTRIB(prod_mode_write_protect); 772 DEF_QLA_TPG_ATTRIB(demo_mode_login_only); 773 774 static struct configfs_attribute *tcm_qla2xxx_tpg_attrib_attrs[] = { 775 &tcm_qla2xxx_tpg_attrib_attr_generate_node_acls, 776 &tcm_qla2xxx_tpg_attrib_attr_cache_dynamic_acls, 777 &tcm_qla2xxx_tpg_attrib_attr_demo_mode_write_protect, 778 &tcm_qla2xxx_tpg_attrib_attr_prod_mode_write_protect, 779 &tcm_qla2xxx_tpg_attrib_attr_demo_mode_login_only, 780 NULL, 781 }; 782 783 /* End items for tcm_qla2xxx_tpg_attrib_cit */ 784 785 static ssize_t tcm_qla2xxx_tpg_enable_show(struct config_item *item, 786 char *page) 787 { 788 struct se_portal_group *se_tpg = to_tpg(item); 789 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 790 struct tcm_qla2xxx_tpg, se_tpg); 791 792 return snprintf(page, PAGE_SIZE, "%d\n", 793 atomic_read(&tpg->lport_tpg_enabled)); 794 } 795 796 static void tcm_qla2xxx_depend_tpg(struct work_struct *work) 797 { 798 struct tcm_qla2xxx_tpg *base_tpg = container_of(work, 799 struct tcm_qla2xxx_tpg, tpg_base_work); 800 struct se_portal_group *se_tpg = &base_tpg->se_tpg; 801 struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha; 802 803 if (!target_depend_item(&se_tpg->tpg_group.cg_item)) { 804 atomic_set(&base_tpg->lport_tpg_enabled, 1); 805 qlt_enable_vha(base_vha); 806 } 807 complete(&base_tpg->tpg_base_comp); 808 } 809 810 static void tcm_qla2xxx_undepend_tpg(struct work_struct *work) 811 { 812 struct tcm_qla2xxx_tpg *base_tpg = container_of(work, 813 struct tcm_qla2xxx_tpg, tpg_base_work); 814 struct se_portal_group *se_tpg = &base_tpg->se_tpg; 815 struct scsi_qla_host *base_vha = base_tpg->lport->qla_vha; 816 817 if (!qlt_stop_phase1(base_vha->vha_tgt.qla_tgt)) { 818 atomic_set(&base_tpg->lport_tpg_enabled, 0); 819 target_undepend_item(&se_tpg->tpg_group.cg_item); 820 } 821 complete(&base_tpg->tpg_base_comp); 822 } 823 824 static ssize_t tcm_qla2xxx_tpg_enable_store(struct config_item *item, 825 const char *page, size_t count) 826 { 827 struct se_portal_group *se_tpg = to_tpg(item); 828 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 829 struct tcm_qla2xxx_tpg, se_tpg); 830 unsigned long op; 831 int rc; 832 833 rc = kstrtoul(page, 0, &op); 834 if (rc < 0) { 835 pr_err("kstrtoul() returned %d\n", rc); 836 return -EINVAL; 837 } 838 if ((op != 1) && (op != 0)) { 839 pr_err("Illegal value for tpg_enable: %lu\n", op); 840 return -EINVAL; 841 } 842 if (op) { 843 if (atomic_read(&tpg->lport_tpg_enabled)) 844 return -EEXIST; 845 846 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_depend_tpg); 847 } else { 848 if (!atomic_read(&tpg->lport_tpg_enabled)) 849 return count; 850 851 INIT_WORK(&tpg->tpg_base_work, tcm_qla2xxx_undepend_tpg); 852 } 853 init_completion(&tpg->tpg_base_comp); 854 schedule_work(&tpg->tpg_base_work); 855 wait_for_completion(&tpg->tpg_base_comp); 856 857 if (op) { 858 if (!atomic_read(&tpg->lport_tpg_enabled)) 859 return -ENODEV; 860 } else { 861 if (atomic_read(&tpg->lport_tpg_enabled)) 862 return -EPERM; 863 } 864 return count; 865 } 866 867 static ssize_t tcm_qla2xxx_tpg_dynamic_sessions_show(struct config_item *item, 868 char *page) 869 { 870 return target_show_dynamic_sessions(to_tpg(item), page); 871 } 872 873 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_store(struct config_item *item, 874 const char *page, size_t count) 875 { 876 struct se_portal_group *se_tpg = to_tpg(item); 877 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 878 struct tcm_qla2xxx_tpg, se_tpg); 879 unsigned long val; 880 int ret = kstrtoul(page, 0, &val); 881 882 if (ret) { 883 pr_err("kstrtoul() returned %d for fabric_prot_type\n", ret); 884 return ret; 885 } 886 if (val != 0 && val != 1 && val != 3) { 887 pr_err("Invalid qla2xxx fabric_prot_type: %lu\n", val); 888 return -EINVAL; 889 } 890 tpg->tpg_attrib.fabric_prot_type = val; 891 892 return count; 893 } 894 895 static ssize_t tcm_qla2xxx_tpg_fabric_prot_type_show(struct config_item *item, 896 char *page) 897 { 898 struct se_portal_group *se_tpg = to_tpg(item); 899 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 900 struct tcm_qla2xxx_tpg, se_tpg); 901 902 return sprintf(page, "%d\n", tpg->tpg_attrib.fabric_prot_type); 903 } 904 905 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, enable); 906 CONFIGFS_ATTR_RO(tcm_qla2xxx_tpg_, dynamic_sessions); 907 CONFIGFS_ATTR(tcm_qla2xxx_tpg_, fabric_prot_type); 908 909 static struct configfs_attribute *tcm_qla2xxx_tpg_attrs[] = { 910 &tcm_qla2xxx_tpg_attr_enable, 911 &tcm_qla2xxx_tpg_attr_dynamic_sessions, 912 &tcm_qla2xxx_tpg_attr_fabric_prot_type, 913 NULL, 914 }; 915 916 static struct se_portal_group *tcm_qla2xxx_make_tpg( 917 struct se_wwn *wwn, 918 struct config_group *group, 919 const char *name) 920 { 921 struct tcm_qla2xxx_lport *lport = container_of(wwn, 922 struct tcm_qla2xxx_lport, lport_wwn); 923 struct tcm_qla2xxx_tpg *tpg; 924 unsigned long tpgt; 925 int ret; 926 927 if (strstr(name, "tpgt_") != name) 928 return ERR_PTR(-EINVAL); 929 if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX) 930 return ERR_PTR(-EINVAL); 931 932 if ((tpgt != 1)) { 933 pr_err("In non NPIV mode, a single TPG=1 is used for HW port mappings\n"); 934 return ERR_PTR(-ENOSYS); 935 } 936 937 tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL); 938 if (!tpg) { 939 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n"); 940 return ERR_PTR(-ENOMEM); 941 } 942 tpg->lport = lport; 943 tpg->lport_tpgt = tpgt; 944 /* 945 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic 946 * NodeACLs 947 */ 948 tpg->tpg_attrib.generate_node_acls = 1; 949 tpg->tpg_attrib.demo_mode_write_protect = 1; 950 tpg->tpg_attrib.cache_dynamic_acls = 1; 951 tpg->tpg_attrib.demo_mode_login_only = 1; 952 953 ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP); 954 if (ret < 0) { 955 kfree(tpg); 956 return NULL; 957 } 958 959 lport->tpg_1 = tpg; 960 961 return &tpg->se_tpg; 962 } 963 964 static void tcm_qla2xxx_drop_tpg(struct se_portal_group *se_tpg) 965 { 966 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 967 struct tcm_qla2xxx_tpg, se_tpg); 968 struct tcm_qla2xxx_lport *lport = tpg->lport; 969 struct scsi_qla_host *vha = lport->qla_vha; 970 /* 971 * Call into qla2x_target.c LLD logic to shutdown the active 972 * FC Nexuses and disable target mode operation for this qla_hw_data 973 */ 974 if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stop) 975 qlt_stop_phase1(vha->vha_tgt.qla_tgt); 976 977 core_tpg_deregister(se_tpg); 978 /* 979 * Clear local TPG=1 pointer for non NPIV mode. 980 */ 981 lport->tpg_1 = NULL; 982 kfree(tpg); 983 } 984 985 static ssize_t tcm_qla2xxx_npiv_tpg_enable_show(struct config_item *item, 986 char *page) 987 { 988 return tcm_qla2xxx_tpg_enable_show(item, page); 989 } 990 991 static ssize_t tcm_qla2xxx_npiv_tpg_enable_store(struct config_item *item, 992 const char *page, size_t count) 993 { 994 struct se_portal_group *se_tpg = to_tpg(item); 995 struct se_wwn *se_wwn = se_tpg->se_tpg_wwn; 996 struct tcm_qla2xxx_lport *lport = container_of(se_wwn, 997 struct tcm_qla2xxx_lport, lport_wwn); 998 struct scsi_qla_host *vha = lport->qla_vha; 999 struct tcm_qla2xxx_tpg *tpg = container_of(se_tpg, 1000 struct tcm_qla2xxx_tpg, se_tpg); 1001 unsigned long op; 1002 int rc; 1003 1004 rc = kstrtoul(page, 0, &op); 1005 if (rc < 0) { 1006 pr_err("kstrtoul() returned %d\n", rc); 1007 return -EINVAL; 1008 } 1009 if ((op != 1) && (op != 0)) { 1010 pr_err("Illegal value for tpg_enable: %lu\n", op); 1011 return -EINVAL; 1012 } 1013 if (op) { 1014 if (atomic_read(&tpg->lport_tpg_enabled)) 1015 return -EEXIST; 1016 1017 atomic_set(&tpg->lport_tpg_enabled, 1); 1018 qlt_enable_vha(vha); 1019 } else { 1020 if (!atomic_read(&tpg->lport_tpg_enabled)) 1021 return count; 1022 1023 atomic_set(&tpg->lport_tpg_enabled, 0); 1024 qlt_stop_phase1(vha->vha_tgt.qla_tgt); 1025 } 1026 1027 return count; 1028 } 1029 1030 CONFIGFS_ATTR(tcm_qla2xxx_npiv_tpg_, enable); 1031 1032 static struct configfs_attribute *tcm_qla2xxx_npiv_tpg_attrs[] = { 1033 &tcm_qla2xxx_npiv_tpg_attr_enable, 1034 NULL, 1035 }; 1036 1037 static struct se_portal_group *tcm_qla2xxx_npiv_make_tpg( 1038 struct se_wwn *wwn, 1039 struct config_group *group, 1040 const char *name) 1041 { 1042 struct tcm_qla2xxx_lport *lport = container_of(wwn, 1043 struct tcm_qla2xxx_lport, lport_wwn); 1044 struct tcm_qla2xxx_tpg *tpg; 1045 unsigned long tpgt; 1046 int ret; 1047 1048 if (strstr(name, "tpgt_") != name) 1049 return ERR_PTR(-EINVAL); 1050 if (kstrtoul(name + 5, 10, &tpgt) || tpgt > USHRT_MAX) 1051 return ERR_PTR(-EINVAL); 1052 1053 tpg = kzalloc(sizeof(struct tcm_qla2xxx_tpg), GFP_KERNEL); 1054 if (!tpg) { 1055 pr_err("Unable to allocate struct tcm_qla2xxx_tpg\n"); 1056 return ERR_PTR(-ENOMEM); 1057 } 1058 tpg->lport = lport; 1059 tpg->lport_tpgt = tpgt; 1060 1061 /* 1062 * By default allow READ-ONLY TPG demo-mode access w/ cached dynamic 1063 * NodeACLs 1064 */ 1065 tpg->tpg_attrib.generate_node_acls = 1; 1066 tpg->tpg_attrib.demo_mode_write_protect = 1; 1067 tpg->tpg_attrib.cache_dynamic_acls = 1; 1068 tpg->tpg_attrib.demo_mode_login_only = 1; 1069 1070 ret = core_tpg_register(wwn, &tpg->se_tpg, SCSI_PROTOCOL_FCP); 1071 if (ret < 0) { 1072 kfree(tpg); 1073 return NULL; 1074 } 1075 lport->tpg_1 = tpg; 1076 return &tpg->se_tpg; 1077 } 1078 1079 /* 1080 * Expected to be called with struct qla_hw_data->hardware_lock held 1081 */ 1082 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_s_id( 1083 scsi_qla_host_t *vha, 1084 const uint8_t *s_id) 1085 { 1086 struct tcm_qla2xxx_lport *lport; 1087 struct se_node_acl *se_nacl; 1088 struct tcm_qla2xxx_nacl *nacl; 1089 u32 key; 1090 1091 lport = vha->vha_tgt.target_lport_ptr; 1092 if (!lport) { 1093 pr_err("Unable to locate struct tcm_qla2xxx_lport\n"); 1094 dump_stack(); 1095 return NULL; 1096 } 1097 1098 key = sid_to_key(s_id); 1099 pr_debug("find_sess_by_s_id: 0x%06x\n", key); 1100 1101 se_nacl = btree_lookup32(&lport->lport_fcport_map, key); 1102 if (!se_nacl) { 1103 pr_debug("Unable to locate s_id: 0x%06x\n", key); 1104 return NULL; 1105 } 1106 pr_debug("find_sess_by_s_id: located se_nacl: %p, initiatorname: %s\n", 1107 se_nacl, se_nacl->initiatorname); 1108 1109 nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl); 1110 if (!nacl->qla_tgt_sess) { 1111 pr_err("Unable to locate struct qla_tgt_sess\n"); 1112 return NULL; 1113 } 1114 1115 return nacl->qla_tgt_sess; 1116 } 1117 1118 /* 1119 * Expected to be called with struct qla_hw_data->hardware_lock held 1120 */ 1121 static void tcm_qla2xxx_set_sess_by_s_id( 1122 struct tcm_qla2xxx_lport *lport, 1123 struct se_node_acl *new_se_nacl, 1124 struct tcm_qla2xxx_nacl *nacl, 1125 struct se_session *se_sess, 1126 struct qla_tgt_sess *qla_tgt_sess, 1127 uint8_t *s_id) 1128 { 1129 u32 key; 1130 void *slot; 1131 int rc; 1132 1133 key = sid_to_key(s_id); 1134 pr_debug("set_sess_by_s_id: %06x\n", key); 1135 1136 slot = btree_lookup32(&lport->lport_fcport_map, key); 1137 if (!slot) { 1138 if (new_se_nacl) { 1139 pr_debug("Setting up new fc_port entry to new_se_nacl\n"); 1140 nacl->nport_id = key; 1141 rc = btree_insert32(&lport->lport_fcport_map, key, 1142 new_se_nacl, GFP_ATOMIC); 1143 if (rc) 1144 printk(KERN_ERR "Unable to insert s_id into fcport_map: %06x\n", 1145 (int)key); 1146 } else { 1147 pr_debug("Wiping nonexisting fc_port entry\n"); 1148 } 1149 1150 qla_tgt_sess->se_sess = se_sess; 1151 nacl->qla_tgt_sess = qla_tgt_sess; 1152 return; 1153 } 1154 1155 if (nacl->qla_tgt_sess) { 1156 if (new_se_nacl == NULL) { 1157 pr_debug("Clearing existing nacl->qla_tgt_sess and fc_port entry\n"); 1158 btree_remove32(&lport->lport_fcport_map, key); 1159 nacl->qla_tgt_sess = NULL; 1160 return; 1161 } 1162 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_port entry\n"); 1163 btree_update32(&lport->lport_fcport_map, key, new_se_nacl); 1164 qla_tgt_sess->se_sess = se_sess; 1165 nacl->qla_tgt_sess = qla_tgt_sess; 1166 return; 1167 } 1168 1169 if (new_se_nacl == NULL) { 1170 pr_debug("Clearing existing fc_port entry\n"); 1171 btree_remove32(&lport->lport_fcport_map, key); 1172 return; 1173 } 1174 1175 pr_debug("Replacing existing fc_port entry w/o active nacl->qla_tgt_sess\n"); 1176 btree_update32(&lport->lport_fcport_map, key, new_se_nacl); 1177 qla_tgt_sess->se_sess = se_sess; 1178 nacl->qla_tgt_sess = qla_tgt_sess; 1179 1180 pr_debug("Setup nacl->qla_tgt_sess %p by s_id for se_nacl: %p, initiatorname: %s\n", 1181 nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname); 1182 } 1183 1184 /* 1185 * Expected to be called with struct qla_hw_data->hardware_lock held 1186 */ 1187 static struct qla_tgt_sess *tcm_qla2xxx_find_sess_by_loop_id( 1188 scsi_qla_host_t *vha, 1189 const uint16_t loop_id) 1190 { 1191 struct tcm_qla2xxx_lport *lport; 1192 struct se_node_acl *se_nacl; 1193 struct tcm_qla2xxx_nacl *nacl; 1194 struct tcm_qla2xxx_fc_loopid *fc_loopid; 1195 1196 lport = vha->vha_tgt.target_lport_ptr; 1197 if (!lport) { 1198 pr_err("Unable to locate struct tcm_qla2xxx_lport\n"); 1199 dump_stack(); 1200 return NULL; 1201 } 1202 1203 pr_debug("find_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id); 1204 1205 fc_loopid = lport->lport_loopid_map + loop_id; 1206 se_nacl = fc_loopid->se_nacl; 1207 if (!se_nacl) { 1208 pr_debug("Unable to locate se_nacl by loop_id: 0x%04x\n", 1209 loop_id); 1210 return NULL; 1211 } 1212 1213 nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl); 1214 1215 if (!nacl->qla_tgt_sess) { 1216 pr_err("Unable to locate struct qla_tgt_sess\n"); 1217 return NULL; 1218 } 1219 1220 return nacl->qla_tgt_sess; 1221 } 1222 1223 /* 1224 * Expected to be called with struct qla_hw_data->hardware_lock held 1225 */ 1226 static void tcm_qla2xxx_set_sess_by_loop_id( 1227 struct tcm_qla2xxx_lport *lport, 1228 struct se_node_acl *new_se_nacl, 1229 struct tcm_qla2xxx_nacl *nacl, 1230 struct se_session *se_sess, 1231 struct qla_tgt_sess *qla_tgt_sess, 1232 uint16_t loop_id) 1233 { 1234 struct se_node_acl *saved_nacl; 1235 struct tcm_qla2xxx_fc_loopid *fc_loopid; 1236 1237 pr_debug("set_sess_by_loop_id: Using loop_id: 0x%04x\n", loop_id); 1238 1239 fc_loopid = &((struct tcm_qla2xxx_fc_loopid *) 1240 lport->lport_loopid_map)[loop_id]; 1241 1242 saved_nacl = fc_loopid->se_nacl; 1243 if (!saved_nacl) { 1244 pr_debug("Setting up new fc_loopid->se_nacl to new_se_nacl\n"); 1245 fc_loopid->se_nacl = new_se_nacl; 1246 if (qla_tgt_sess->se_sess != se_sess) 1247 qla_tgt_sess->se_sess = se_sess; 1248 if (nacl->qla_tgt_sess != qla_tgt_sess) 1249 nacl->qla_tgt_sess = qla_tgt_sess; 1250 return; 1251 } 1252 1253 if (nacl->qla_tgt_sess) { 1254 if (new_se_nacl == NULL) { 1255 pr_debug("Clearing nacl->qla_tgt_sess and fc_loopid->se_nacl\n"); 1256 fc_loopid->se_nacl = NULL; 1257 nacl->qla_tgt_sess = NULL; 1258 return; 1259 } 1260 1261 pr_debug("Replacing existing nacl->qla_tgt_sess and fc_loopid->se_nacl\n"); 1262 fc_loopid->se_nacl = new_se_nacl; 1263 if (qla_tgt_sess->se_sess != se_sess) 1264 qla_tgt_sess->se_sess = se_sess; 1265 if (nacl->qla_tgt_sess != qla_tgt_sess) 1266 nacl->qla_tgt_sess = qla_tgt_sess; 1267 return; 1268 } 1269 1270 if (new_se_nacl == NULL) { 1271 pr_debug("Clearing fc_loopid->se_nacl\n"); 1272 fc_loopid->se_nacl = NULL; 1273 return; 1274 } 1275 1276 pr_debug("Replacing existing fc_loopid->se_nacl w/o active nacl->qla_tgt_sess\n"); 1277 fc_loopid->se_nacl = new_se_nacl; 1278 if (qla_tgt_sess->se_sess != se_sess) 1279 qla_tgt_sess->se_sess = se_sess; 1280 if (nacl->qla_tgt_sess != qla_tgt_sess) 1281 nacl->qla_tgt_sess = qla_tgt_sess; 1282 1283 pr_debug("Setup nacl->qla_tgt_sess %p by loop_id for se_nacl: %p, initiatorname: %s\n", 1284 nacl->qla_tgt_sess, new_se_nacl, new_se_nacl->initiatorname); 1285 } 1286 1287 /* 1288 * Should always be called with qla_hw_data->hardware_lock held. 1289 */ 1290 static void tcm_qla2xxx_clear_sess_lookup(struct tcm_qla2xxx_lport *lport, 1291 struct tcm_qla2xxx_nacl *nacl, struct qla_tgt_sess *sess) 1292 { 1293 struct se_session *se_sess = sess->se_sess; 1294 unsigned char be_sid[3]; 1295 1296 be_sid[0] = sess->s_id.b.domain; 1297 be_sid[1] = sess->s_id.b.area; 1298 be_sid[2] = sess->s_id.b.al_pa; 1299 1300 tcm_qla2xxx_set_sess_by_s_id(lport, NULL, nacl, se_sess, 1301 sess, be_sid); 1302 tcm_qla2xxx_set_sess_by_loop_id(lport, NULL, nacl, se_sess, 1303 sess, sess->loop_id); 1304 } 1305 1306 static void tcm_qla2xxx_free_session(struct qla_tgt_sess *sess) 1307 { 1308 struct qla_tgt *tgt = sess->tgt; 1309 struct qla_hw_data *ha = tgt->ha; 1310 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev); 1311 struct se_session *se_sess; 1312 struct tcm_qla2xxx_lport *lport; 1313 1314 BUG_ON(in_interrupt()); 1315 1316 se_sess = sess->se_sess; 1317 if (!se_sess) { 1318 pr_err("struct qla_tgt_sess->se_sess is NULL\n"); 1319 dump_stack(); 1320 return; 1321 } 1322 1323 lport = vha->vha_tgt.target_lport_ptr; 1324 if (!lport) { 1325 pr_err("Unable to locate struct tcm_qla2xxx_lport\n"); 1326 dump_stack(); 1327 return; 1328 } 1329 target_wait_for_sess_cmds(se_sess); 1330 1331 transport_deregister_session_configfs(sess->se_sess); 1332 transport_deregister_session(sess->se_sess); 1333 } 1334 1335 /* 1336 * Called via qlt_create_sess():ha->qla2x_tmpl->check_initiator_node_acl() 1337 * to locate struct se_node_acl 1338 */ 1339 static int tcm_qla2xxx_check_initiator_node_acl( 1340 scsi_qla_host_t *vha, 1341 unsigned char *fc_wwpn, 1342 void *qla_tgt_sess, 1343 uint8_t *s_id, 1344 uint16_t loop_id) 1345 { 1346 struct qla_hw_data *ha = vha->hw; 1347 struct tcm_qla2xxx_lport *lport; 1348 struct tcm_qla2xxx_tpg *tpg; 1349 struct tcm_qla2xxx_nacl *nacl; 1350 struct se_portal_group *se_tpg; 1351 struct se_node_acl *se_nacl; 1352 struct se_session *se_sess; 1353 struct qla_tgt_sess *sess = qla_tgt_sess; 1354 unsigned char port_name[36]; 1355 unsigned long flags; 1356 int num_tags = (ha->fw_xcb_count) ? ha->fw_xcb_count : 1357 TCM_QLA2XXX_DEFAULT_TAGS; 1358 1359 lport = vha->vha_tgt.target_lport_ptr; 1360 if (!lport) { 1361 pr_err("Unable to locate struct tcm_qla2xxx_lport\n"); 1362 dump_stack(); 1363 return -EINVAL; 1364 } 1365 /* 1366 * Locate the TPG=1 reference.. 1367 */ 1368 tpg = lport->tpg_1; 1369 if (!tpg) { 1370 pr_err("Unable to lcoate struct tcm_qla2xxx_lport->tpg_1\n"); 1371 return -EINVAL; 1372 } 1373 se_tpg = &tpg->se_tpg; 1374 1375 se_sess = transport_init_session_tags(num_tags, 1376 sizeof(struct qla_tgt_cmd), 1377 TARGET_PROT_ALL); 1378 if (IS_ERR(se_sess)) { 1379 pr_err("Unable to initialize struct se_session\n"); 1380 return PTR_ERR(se_sess); 1381 } 1382 /* 1383 * Format the FCP Initiator port_name into colon seperated values to 1384 * match the format by tcm_qla2xxx explict ConfigFS NodeACLs. 1385 */ 1386 memset(&port_name, 0, 36); 1387 snprintf(port_name, sizeof(port_name), "%8phC", fc_wwpn); 1388 /* 1389 * Locate our struct se_node_acl either from an explict NodeACL created 1390 * via ConfigFS, or via running in TPG demo mode. 1391 */ 1392 se_sess->se_node_acl = core_tpg_check_initiator_node_acl(se_tpg, 1393 port_name); 1394 if (!se_sess->se_node_acl) { 1395 transport_free_session(se_sess); 1396 return -EINVAL; 1397 } 1398 se_nacl = se_sess->se_node_acl; 1399 nacl = container_of(se_nacl, struct tcm_qla2xxx_nacl, se_node_acl); 1400 /* 1401 * And now setup the new se_nacl and session pointers into our HW lport 1402 * mappings for fabric S_ID and LOOP_ID. 1403 */ 1404 spin_lock_irqsave(&ha->hardware_lock, flags); 1405 tcm_qla2xxx_set_sess_by_s_id(lport, se_nacl, nacl, se_sess, 1406 qla_tgt_sess, s_id); 1407 tcm_qla2xxx_set_sess_by_loop_id(lport, se_nacl, nacl, se_sess, 1408 qla_tgt_sess, loop_id); 1409 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1410 /* 1411 * Finally register the new FC Nexus with TCM 1412 */ 1413 transport_register_session(se_nacl->se_tpg, se_nacl, se_sess, sess); 1414 1415 return 0; 1416 } 1417 1418 static void tcm_qla2xxx_update_sess(struct qla_tgt_sess *sess, port_id_t s_id, 1419 uint16_t loop_id, bool conf_compl_supported) 1420 { 1421 struct qla_tgt *tgt = sess->tgt; 1422 struct qla_hw_data *ha = tgt->ha; 1423 scsi_qla_host_t *vha = pci_get_drvdata(ha->pdev); 1424 struct tcm_qla2xxx_lport *lport = vha->vha_tgt.target_lport_ptr; 1425 struct se_node_acl *se_nacl = sess->se_sess->se_node_acl; 1426 struct tcm_qla2xxx_nacl *nacl = container_of(se_nacl, 1427 struct tcm_qla2xxx_nacl, se_node_acl); 1428 u32 key; 1429 1430 1431 if (sess->loop_id != loop_id || sess->s_id.b24 != s_id.b24) 1432 pr_info("Updating session %p from port %8phC loop_id %d -> %d s_id %x:%x:%x -> %x:%x:%x\n", 1433 sess, sess->port_name, 1434 sess->loop_id, loop_id, sess->s_id.b.domain, 1435 sess->s_id.b.area, sess->s_id.b.al_pa, s_id.b.domain, 1436 s_id.b.area, s_id.b.al_pa); 1437 1438 if (sess->loop_id != loop_id) { 1439 /* 1440 * Because we can shuffle loop IDs around and we 1441 * update different sessions non-atomically, we might 1442 * have overwritten this session's old loop ID 1443 * already, and we might end up overwriting some other 1444 * session that will be updated later. So we have to 1445 * be extra careful and we can't warn about those things... 1446 */ 1447 if (lport->lport_loopid_map[sess->loop_id].se_nacl == se_nacl) 1448 lport->lport_loopid_map[sess->loop_id].se_nacl = NULL; 1449 1450 lport->lport_loopid_map[loop_id].se_nacl = se_nacl; 1451 1452 sess->loop_id = loop_id; 1453 } 1454 1455 if (sess->s_id.b24 != s_id.b24) { 1456 key = (((u32) sess->s_id.b.domain << 16) | 1457 ((u32) sess->s_id.b.area << 8) | 1458 ((u32) sess->s_id.b.al_pa)); 1459 1460 if (btree_lookup32(&lport->lport_fcport_map, key)) 1461 WARN(btree_remove32(&lport->lport_fcport_map, key) != se_nacl, 1462 "Found wrong se_nacl when updating s_id %x:%x:%x\n", 1463 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa); 1464 else 1465 WARN(1, "No lport_fcport_map entry for s_id %x:%x:%x\n", 1466 sess->s_id.b.domain, sess->s_id.b.area, sess->s_id.b.al_pa); 1467 1468 key = (((u32) s_id.b.domain << 16) | 1469 ((u32) s_id.b.area << 8) | 1470 ((u32) s_id.b.al_pa)); 1471 1472 if (btree_lookup32(&lport->lport_fcport_map, key)) { 1473 WARN(1, "Already have lport_fcport_map entry for s_id %x:%x:%x\n", 1474 s_id.b.domain, s_id.b.area, s_id.b.al_pa); 1475 btree_update32(&lport->lport_fcport_map, key, se_nacl); 1476 } else { 1477 btree_insert32(&lport->lport_fcport_map, key, se_nacl, GFP_ATOMIC); 1478 } 1479 1480 sess->s_id = s_id; 1481 nacl->nport_id = key; 1482 } 1483 1484 sess->conf_compl_supported = conf_compl_supported; 1485 1486 /* Reset logout parameters to default */ 1487 sess->logout_on_delete = 1; 1488 sess->keep_nport_handle = 0; 1489 } 1490 1491 /* 1492 * Calls into tcm_qla2xxx used by qla2xxx LLD I/O path. 1493 */ 1494 static struct qla_tgt_func_tmpl tcm_qla2xxx_template = { 1495 .handle_cmd = tcm_qla2xxx_handle_cmd, 1496 .handle_data = tcm_qla2xxx_handle_data, 1497 .handle_dif_err = tcm_qla2xxx_handle_dif_err, 1498 .handle_tmr = tcm_qla2xxx_handle_tmr, 1499 .free_cmd = tcm_qla2xxx_free_cmd, 1500 .free_mcmd = tcm_qla2xxx_free_mcmd, 1501 .free_session = tcm_qla2xxx_free_session, 1502 .update_sess = tcm_qla2xxx_update_sess, 1503 .check_initiator_node_acl = tcm_qla2xxx_check_initiator_node_acl, 1504 .find_sess_by_s_id = tcm_qla2xxx_find_sess_by_s_id, 1505 .find_sess_by_loop_id = tcm_qla2xxx_find_sess_by_loop_id, 1506 .clear_nacl_from_fcport_map = tcm_qla2xxx_clear_nacl_from_fcport_map, 1507 .put_sess = tcm_qla2xxx_put_sess, 1508 .shutdown_sess = tcm_qla2xxx_shutdown_sess, 1509 }; 1510 1511 static int tcm_qla2xxx_init_lport(struct tcm_qla2xxx_lport *lport) 1512 { 1513 int rc; 1514 1515 rc = btree_init32(&lport->lport_fcport_map); 1516 if (rc) { 1517 pr_err("Unable to initialize lport->lport_fcport_map btree\n"); 1518 return rc; 1519 } 1520 1521 lport->lport_loopid_map = vmalloc(sizeof(struct tcm_qla2xxx_fc_loopid) * 1522 65536); 1523 if (!lport->lport_loopid_map) { 1524 pr_err("Unable to allocate lport->lport_loopid_map of %zu bytes\n", 1525 sizeof(struct tcm_qla2xxx_fc_loopid) * 65536); 1526 btree_destroy32(&lport->lport_fcport_map); 1527 return -ENOMEM; 1528 } 1529 memset(lport->lport_loopid_map, 0, sizeof(struct tcm_qla2xxx_fc_loopid) 1530 * 65536); 1531 pr_debug("qla2xxx: Allocated lport_loopid_map of %zu bytes\n", 1532 sizeof(struct tcm_qla2xxx_fc_loopid) * 65536); 1533 return 0; 1534 } 1535 1536 static int tcm_qla2xxx_lport_register_cb(struct scsi_qla_host *vha, 1537 void *target_lport_ptr, 1538 u64 npiv_wwpn, u64 npiv_wwnn) 1539 { 1540 struct qla_hw_data *ha = vha->hw; 1541 struct tcm_qla2xxx_lport *lport = 1542 (struct tcm_qla2xxx_lport *)target_lport_ptr; 1543 /* 1544 * Setup tgt_ops, local pointer to vha and target_lport_ptr 1545 */ 1546 ha->tgt.tgt_ops = &tcm_qla2xxx_template; 1547 vha->vha_tgt.target_lport_ptr = target_lport_ptr; 1548 lport->qla_vha = vha; 1549 1550 return 0; 1551 } 1552 1553 static struct se_wwn *tcm_qla2xxx_make_lport( 1554 struct target_fabric_configfs *tf, 1555 struct config_group *group, 1556 const char *name) 1557 { 1558 struct tcm_qla2xxx_lport *lport; 1559 u64 wwpn; 1560 int ret = -ENODEV; 1561 1562 if (tcm_qla2xxx_parse_wwn(name, &wwpn, 1) < 0) 1563 return ERR_PTR(-EINVAL); 1564 1565 lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL); 1566 if (!lport) { 1567 pr_err("Unable to allocate struct tcm_qla2xxx_lport\n"); 1568 return ERR_PTR(-ENOMEM); 1569 } 1570 lport->lport_wwpn = wwpn; 1571 tcm_qla2xxx_format_wwn(&lport->lport_name[0], TCM_QLA2XXX_NAMELEN, 1572 wwpn); 1573 sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) wwpn); 1574 1575 ret = tcm_qla2xxx_init_lport(lport); 1576 if (ret != 0) 1577 goto out; 1578 1579 ret = qlt_lport_register(lport, wwpn, 0, 0, 1580 tcm_qla2xxx_lport_register_cb); 1581 if (ret != 0) 1582 goto out_lport; 1583 1584 return &lport->lport_wwn; 1585 out_lport: 1586 vfree(lport->lport_loopid_map); 1587 btree_destroy32(&lport->lport_fcport_map); 1588 out: 1589 kfree(lport); 1590 return ERR_PTR(ret); 1591 } 1592 1593 static void tcm_qla2xxx_drop_lport(struct se_wwn *wwn) 1594 { 1595 struct tcm_qla2xxx_lport *lport = container_of(wwn, 1596 struct tcm_qla2xxx_lport, lport_wwn); 1597 struct scsi_qla_host *vha = lport->qla_vha; 1598 struct se_node_acl *node; 1599 u32 key = 0; 1600 1601 /* 1602 * Call into qla2x_target.c LLD logic to complete the 1603 * shutdown of struct qla_tgt after the call to 1604 * qlt_stop_phase1() from tcm_qla2xxx_drop_tpg() above.. 1605 */ 1606 if (vha->vha_tgt.qla_tgt && !vha->vha_tgt.qla_tgt->tgt_stopped) 1607 qlt_stop_phase2(vha->vha_tgt.qla_tgt); 1608 1609 qlt_lport_deregister(vha); 1610 1611 vfree(lport->lport_loopid_map); 1612 btree_for_each_safe32(&lport->lport_fcport_map, key, node) 1613 btree_remove32(&lport->lport_fcport_map, key); 1614 btree_destroy32(&lport->lport_fcport_map); 1615 kfree(lport); 1616 } 1617 1618 static int tcm_qla2xxx_lport_register_npiv_cb(struct scsi_qla_host *base_vha, 1619 void *target_lport_ptr, 1620 u64 npiv_wwpn, u64 npiv_wwnn) 1621 { 1622 struct fc_vport *vport; 1623 struct Scsi_Host *sh = base_vha->host; 1624 struct scsi_qla_host *npiv_vha; 1625 struct tcm_qla2xxx_lport *lport = 1626 (struct tcm_qla2xxx_lport *)target_lport_ptr; 1627 struct tcm_qla2xxx_lport *base_lport = 1628 (struct tcm_qla2xxx_lport *)base_vha->vha_tgt.target_lport_ptr; 1629 struct fc_vport_identifiers vport_id; 1630 1631 if (!qla_tgt_mode_enabled(base_vha)) { 1632 pr_err("qla2xxx base_vha not enabled for target mode\n"); 1633 return -EPERM; 1634 } 1635 1636 if (!base_lport || !base_lport->tpg_1 || 1637 !atomic_read(&base_lport->tpg_1->lport_tpg_enabled)) { 1638 pr_err("qla2xxx base_lport or tpg_1 not available\n"); 1639 return -EPERM; 1640 } 1641 1642 memset(&vport_id, 0, sizeof(vport_id)); 1643 vport_id.port_name = npiv_wwpn; 1644 vport_id.node_name = npiv_wwnn; 1645 vport_id.roles = FC_PORT_ROLE_FCP_INITIATOR; 1646 vport_id.vport_type = FC_PORTTYPE_NPIV; 1647 vport_id.disable = false; 1648 1649 vport = fc_vport_create(sh, 0, &vport_id); 1650 if (!vport) { 1651 pr_err("fc_vport_create failed for qla2xxx_npiv\n"); 1652 return -ENODEV; 1653 } 1654 /* 1655 * Setup local pointer to NPIV vhba + target_lport_ptr 1656 */ 1657 npiv_vha = (struct scsi_qla_host *)vport->dd_data; 1658 npiv_vha->vha_tgt.target_lport_ptr = target_lport_ptr; 1659 lport->qla_vha = npiv_vha; 1660 scsi_host_get(npiv_vha->host); 1661 return 0; 1662 } 1663 1664 1665 static struct se_wwn *tcm_qla2xxx_npiv_make_lport( 1666 struct target_fabric_configfs *tf, 1667 struct config_group *group, 1668 const char *name) 1669 { 1670 struct tcm_qla2xxx_lport *lport; 1671 u64 phys_wwpn, npiv_wwpn, npiv_wwnn; 1672 char *p, tmp[128]; 1673 int ret; 1674 1675 snprintf(tmp, 128, "%s", name); 1676 1677 p = strchr(tmp, '@'); 1678 if (!p) { 1679 pr_err("Unable to locate NPIV '@' seperator\n"); 1680 return ERR_PTR(-EINVAL); 1681 } 1682 *p++ = '\0'; 1683 1684 if (tcm_qla2xxx_parse_wwn(tmp, &phys_wwpn, 1) < 0) 1685 return ERR_PTR(-EINVAL); 1686 1687 if (tcm_qla2xxx_npiv_parse_wwn(p, strlen(p)+1, 1688 &npiv_wwpn, &npiv_wwnn) < 0) 1689 return ERR_PTR(-EINVAL); 1690 1691 lport = kzalloc(sizeof(struct tcm_qla2xxx_lport), GFP_KERNEL); 1692 if (!lport) { 1693 pr_err("Unable to allocate struct tcm_qla2xxx_lport for NPIV\n"); 1694 return ERR_PTR(-ENOMEM); 1695 } 1696 lport->lport_npiv_wwpn = npiv_wwpn; 1697 lport->lport_npiv_wwnn = npiv_wwnn; 1698 sprintf(lport->lport_naa_name, "naa.%016llx", (unsigned long long) npiv_wwpn); 1699 1700 ret = tcm_qla2xxx_init_lport(lport); 1701 if (ret != 0) 1702 goto out; 1703 1704 ret = qlt_lport_register(lport, phys_wwpn, npiv_wwpn, npiv_wwnn, 1705 tcm_qla2xxx_lport_register_npiv_cb); 1706 if (ret != 0) 1707 goto out_lport; 1708 1709 return &lport->lport_wwn; 1710 out_lport: 1711 vfree(lport->lport_loopid_map); 1712 btree_destroy32(&lport->lport_fcport_map); 1713 out: 1714 kfree(lport); 1715 return ERR_PTR(ret); 1716 } 1717 1718 static void tcm_qla2xxx_npiv_drop_lport(struct se_wwn *wwn) 1719 { 1720 struct tcm_qla2xxx_lport *lport = container_of(wwn, 1721 struct tcm_qla2xxx_lport, lport_wwn); 1722 struct scsi_qla_host *npiv_vha = lport->qla_vha; 1723 struct qla_hw_data *ha = npiv_vha->hw; 1724 scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); 1725 1726 scsi_host_put(npiv_vha->host); 1727 /* 1728 * Notify libfc that we want to release the vha->fc_vport 1729 */ 1730 fc_vport_terminate(npiv_vha->fc_vport); 1731 scsi_host_put(base_vha->host); 1732 kfree(lport); 1733 } 1734 1735 1736 static ssize_t tcm_qla2xxx_wwn_version_show(struct config_item *item, 1737 char *page) 1738 { 1739 return sprintf(page, 1740 "TCM QLOGIC QLA2XXX NPIV capable fabric module %s on %s/%s on " 1741 UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname, 1742 utsname()->machine); 1743 } 1744 1745 CONFIGFS_ATTR_RO(tcm_qla2xxx_wwn_, version); 1746 1747 static struct configfs_attribute *tcm_qla2xxx_wwn_attrs[] = { 1748 &tcm_qla2xxx_wwn_attr_version, 1749 NULL, 1750 }; 1751 1752 static const struct target_core_fabric_ops tcm_qla2xxx_ops = { 1753 .module = THIS_MODULE, 1754 .name = "qla2xxx", 1755 .node_acl_size = sizeof(struct tcm_qla2xxx_nacl), 1756 /* 1757 * XXX: Limit assumes single page per scatter-gather-list entry. 1758 * Current maximum is ~4.9 MB per se_cmd->t_data_sg with PAGE_SIZE=4096 1759 */ 1760 .max_data_sg_nents = 1200, 1761 .get_fabric_name = tcm_qla2xxx_get_fabric_name, 1762 .tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn, 1763 .tpg_get_tag = tcm_qla2xxx_get_tag, 1764 .tpg_check_demo_mode = tcm_qla2xxx_check_demo_mode, 1765 .tpg_check_demo_mode_cache = tcm_qla2xxx_check_demo_mode_cache, 1766 .tpg_check_demo_mode_write_protect = 1767 tcm_qla2xxx_check_demo_write_protect, 1768 .tpg_check_prod_mode_write_protect = 1769 tcm_qla2xxx_check_prod_write_protect, 1770 .tpg_check_prot_fabric_only = tcm_qla2xxx_check_prot_fabric_only, 1771 .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only, 1772 .tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index, 1773 .check_stop_free = tcm_qla2xxx_check_stop_free, 1774 .release_cmd = tcm_qla2xxx_release_cmd, 1775 .shutdown_session = tcm_qla2xxx_shutdown_session, 1776 .close_session = tcm_qla2xxx_close_session, 1777 .sess_get_index = tcm_qla2xxx_sess_get_index, 1778 .sess_get_initiator_sid = NULL, 1779 .write_pending = tcm_qla2xxx_write_pending, 1780 .write_pending_status = tcm_qla2xxx_write_pending_status, 1781 .set_default_node_attributes = tcm_qla2xxx_set_default_node_attrs, 1782 .get_cmd_state = tcm_qla2xxx_get_cmd_state, 1783 .queue_data_in = tcm_qla2xxx_queue_data_in, 1784 .queue_status = tcm_qla2xxx_queue_status, 1785 .queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp, 1786 .aborted_task = tcm_qla2xxx_aborted_task, 1787 /* 1788 * Setup function pointers for generic logic in 1789 * target_core_fabric_configfs.c 1790 */ 1791 .fabric_make_wwn = tcm_qla2xxx_make_lport, 1792 .fabric_drop_wwn = tcm_qla2xxx_drop_lport, 1793 .fabric_make_tpg = tcm_qla2xxx_make_tpg, 1794 .fabric_drop_tpg = tcm_qla2xxx_drop_tpg, 1795 .fabric_init_nodeacl = tcm_qla2xxx_init_nodeacl, 1796 1797 .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs, 1798 .tfc_tpg_base_attrs = tcm_qla2xxx_tpg_attrs, 1799 .tfc_tpg_attrib_attrs = tcm_qla2xxx_tpg_attrib_attrs, 1800 }; 1801 1802 static const struct target_core_fabric_ops tcm_qla2xxx_npiv_ops = { 1803 .module = THIS_MODULE, 1804 .name = "qla2xxx_npiv", 1805 .node_acl_size = sizeof(struct tcm_qla2xxx_nacl), 1806 .get_fabric_name = tcm_qla2xxx_npiv_get_fabric_name, 1807 .tpg_get_wwn = tcm_qla2xxx_get_fabric_wwn, 1808 .tpg_get_tag = tcm_qla2xxx_get_tag, 1809 .tpg_check_demo_mode = tcm_qla2xxx_check_demo_mode, 1810 .tpg_check_demo_mode_cache = tcm_qla2xxx_check_demo_mode_cache, 1811 .tpg_check_demo_mode_write_protect = tcm_qla2xxx_check_demo_mode, 1812 .tpg_check_prod_mode_write_protect = 1813 tcm_qla2xxx_check_prod_write_protect, 1814 .tpg_check_demo_mode_login_only = tcm_qla2xxx_check_demo_mode_login_only, 1815 .tpg_get_inst_index = tcm_qla2xxx_tpg_get_inst_index, 1816 .check_stop_free = tcm_qla2xxx_check_stop_free, 1817 .release_cmd = tcm_qla2xxx_release_cmd, 1818 .shutdown_session = tcm_qla2xxx_shutdown_session, 1819 .close_session = tcm_qla2xxx_close_session, 1820 .sess_get_index = tcm_qla2xxx_sess_get_index, 1821 .sess_get_initiator_sid = NULL, 1822 .write_pending = tcm_qla2xxx_write_pending, 1823 .write_pending_status = tcm_qla2xxx_write_pending_status, 1824 .set_default_node_attributes = tcm_qla2xxx_set_default_node_attrs, 1825 .get_cmd_state = tcm_qla2xxx_get_cmd_state, 1826 .queue_data_in = tcm_qla2xxx_queue_data_in, 1827 .queue_status = tcm_qla2xxx_queue_status, 1828 .queue_tm_rsp = tcm_qla2xxx_queue_tm_rsp, 1829 .aborted_task = tcm_qla2xxx_aborted_task, 1830 /* 1831 * Setup function pointers for generic logic in 1832 * target_core_fabric_configfs.c 1833 */ 1834 .fabric_make_wwn = tcm_qla2xxx_npiv_make_lport, 1835 .fabric_drop_wwn = tcm_qla2xxx_npiv_drop_lport, 1836 .fabric_make_tpg = tcm_qla2xxx_npiv_make_tpg, 1837 .fabric_drop_tpg = tcm_qla2xxx_drop_tpg, 1838 .fabric_init_nodeacl = tcm_qla2xxx_init_nodeacl, 1839 1840 .tfc_wwn_attrs = tcm_qla2xxx_wwn_attrs, 1841 .tfc_tpg_base_attrs = tcm_qla2xxx_npiv_tpg_attrs, 1842 }; 1843 1844 static int tcm_qla2xxx_register_configfs(void) 1845 { 1846 int ret; 1847 1848 pr_debug("TCM QLOGIC QLA2XXX fabric module %s on %s/%s on " 1849 UTS_RELEASE"\n", TCM_QLA2XXX_VERSION, utsname()->sysname, 1850 utsname()->machine); 1851 1852 ret = target_register_template(&tcm_qla2xxx_ops); 1853 if (ret) 1854 return ret; 1855 1856 ret = target_register_template(&tcm_qla2xxx_npiv_ops); 1857 if (ret) 1858 goto out_fabric; 1859 1860 tcm_qla2xxx_free_wq = alloc_workqueue("tcm_qla2xxx_free", 1861 WQ_MEM_RECLAIM, 0); 1862 if (!tcm_qla2xxx_free_wq) { 1863 ret = -ENOMEM; 1864 goto out_fabric_npiv; 1865 } 1866 1867 tcm_qla2xxx_cmd_wq = alloc_workqueue("tcm_qla2xxx_cmd", 0, 0); 1868 if (!tcm_qla2xxx_cmd_wq) { 1869 ret = -ENOMEM; 1870 goto out_free_wq; 1871 } 1872 1873 return 0; 1874 1875 out_free_wq: 1876 destroy_workqueue(tcm_qla2xxx_free_wq); 1877 out_fabric_npiv: 1878 target_unregister_template(&tcm_qla2xxx_npiv_ops); 1879 out_fabric: 1880 target_unregister_template(&tcm_qla2xxx_ops); 1881 return ret; 1882 } 1883 1884 static void tcm_qla2xxx_deregister_configfs(void) 1885 { 1886 destroy_workqueue(tcm_qla2xxx_cmd_wq); 1887 destroy_workqueue(tcm_qla2xxx_free_wq); 1888 1889 target_unregister_template(&tcm_qla2xxx_ops); 1890 target_unregister_template(&tcm_qla2xxx_npiv_ops); 1891 } 1892 1893 static int __init tcm_qla2xxx_init(void) 1894 { 1895 int ret; 1896 1897 ret = tcm_qla2xxx_register_configfs(); 1898 if (ret < 0) 1899 return ret; 1900 1901 return 0; 1902 } 1903 1904 static void __exit tcm_qla2xxx_exit(void) 1905 { 1906 tcm_qla2xxx_deregister_configfs(); 1907 } 1908 1909 MODULE_DESCRIPTION("TCM QLA24XX+ series NPIV enabled fabric driver"); 1910 MODULE_LICENSE("GPL"); 1911 module_init(tcm_qla2xxx_init); 1912 module_exit(tcm_qla2xxx_exit); 1913