1 /******************************************************************************* 2 * Filename: target_core_rd.c 3 * 4 * This file contains the Storage Engine <-> Ramdisk transport 5 * specific functions. 6 * 7 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc. 8 * Copyright (c) 2005, 2006, 2007 SBE, Inc. 9 * Copyright (c) 2007-2010 Rising Tide Systems 10 * Copyright (c) 2008-2010 Linux-iSCSI.org 11 * 12 * Nicholas A. Bellinger <nab@kernel.org> 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 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 27 * 28 ******************************************************************************/ 29 30 #include <linux/string.h> 31 #include <linux/parser.h> 32 #include <linux/timer.h> 33 #include <linux/blkdev.h> 34 #include <linux/slab.h> 35 #include <linux/spinlock.h> 36 #include <scsi/scsi.h> 37 #include <scsi/scsi_host.h> 38 39 #include <target/target_core_base.h> 40 #include <target/target_core_device.h> 41 #include <target/target_core_transport.h> 42 #include <target/target_core_fabric_ops.h> 43 44 #include "target_core_rd.h" 45 46 static struct se_subsystem_api rd_mcp_template; 47 48 /* rd_attach_hba(): (Part of se_subsystem_api_t template) 49 * 50 * 51 */ 52 static int rd_attach_hba(struct se_hba *hba, u32 host_id) 53 { 54 struct rd_host *rd_host; 55 56 rd_host = kzalloc(sizeof(struct rd_host), GFP_KERNEL); 57 if (!rd_host) { 58 pr_err("Unable to allocate memory for struct rd_host\n"); 59 return -ENOMEM; 60 } 61 62 rd_host->rd_host_id = host_id; 63 64 hba->hba_ptr = rd_host; 65 66 pr_debug("CORE_HBA[%d] - TCM Ramdisk HBA Driver %s on" 67 " Generic Target Core Stack %s\n", hba->hba_id, 68 RD_HBA_VERSION, TARGET_CORE_MOD_VERSION); 69 pr_debug("CORE_HBA[%d] - Attached Ramdisk HBA: %u to Generic" 70 " MaxSectors: %u\n", hba->hba_id, 71 rd_host->rd_host_id, RD_MAX_SECTORS); 72 73 return 0; 74 } 75 76 static void rd_detach_hba(struct se_hba *hba) 77 { 78 struct rd_host *rd_host = hba->hba_ptr; 79 80 pr_debug("CORE_HBA[%d] - Detached Ramdisk HBA: %u from" 81 " Generic Target Core\n", hba->hba_id, rd_host->rd_host_id); 82 83 kfree(rd_host); 84 hba->hba_ptr = NULL; 85 } 86 87 /* rd_release_device_space(): 88 * 89 * 90 */ 91 static void rd_release_device_space(struct rd_dev *rd_dev) 92 { 93 u32 i, j, page_count = 0, sg_per_table; 94 struct rd_dev_sg_table *sg_table; 95 struct page *pg; 96 struct scatterlist *sg; 97 98 if (!rd_dev->sg_table_array || !rd_dev->sg_table_count) 99 return; 100 101 sg_table = rd_dev->sg_table_array; 102 103 for (i = 0; i < rd_dev->sg_table_count; i++) { 104 sg = sg_table[i].sg_table; 105 sg_per_table = sg_table[i].rd_sg_count; 106 107 for (j = 0; j < sg_per_table; j++) { 108 pg = sg_page(&sg[j]); 109 if (pg) { 110 __free_page(pg); 111 page_count++; 112 } 113 } 114 115 kfree(sg); 116 } 117 118 pr_debug("CORE_RD[%u] - Released device space for Ramdisk" 119 " Device ID: %u, pages %u in %u tables total bytes %lu\n", 120 rd_dev->rd_host->rd_host_id, rd_dev->rd_dev_id, page_count, 121 rd_dev->sg_table_count, (unsigned long)page_count * PAGE_SIZE); 122 123 kfree(sg_table); 124 rd_dev->sg_table_array = NULL; 125 rd_dev->sg_table_count = 0; 126 } 127 128 129 /* rd_build_device_space(): 130 * 131 * 132 */ 133 static int rd_build_device_space(struct rd_dev *rd_dev) 134 { 135 u32 i = 0, j, page_offset = 0, sg_per_table, sg_tables, total_sg_needed; 136 u32 max_sg_per_table = (RD_MAX_ALLOCATION_SIZE / 137 sizeof(struct scatterlist)); 138 struct rd_dev_sg_table *sg_table; 139 struct page *pg; 140 struct scatterlist *sg; 141 142 if (rd_dev->rd_page_count <= 0) { 143 pr_err("Illegal page count: %u for Ramdisk device\n", 144 rd_dev->rd_page_count); 145 return -EINVAL; 146 } 147 total_sg_needed = rd_dev->rd_page_count; 148 149 sg_tables = (total_sg_needed / max_sg_per_table) + 1; 150 151 sg_table = kzalloc(sg_tables * sizeof(struct rd_dev_sg_table), GFP_KERNEL); 152 if (!sg_table) { 153 pr_err("Unable to allocate memory for Ramdisk" 154 " scatterlist tables\n"); 155 return -ENOMEM; 156 } 157 158 rd_dev->sg_table_array = sg_table; 159 rd_dev->sg_table_count = sg_tables; 160 161 while (total_sg_needed) { 162 sg_per_table = (total_sg_needed > max_sg_per_table) ? 163 max_sg_per_table : total_sg_needed; 164 165 sg = kzalloc(sg_per_table * sizeof(struct scatterlist), 166 GFP_KERNEL); 167 if (!sg) { 168 pr_err("Unable to allocate scatterlist array" 169 " for struct rd_dev\n"); 170 return -ENOMEM; 171 } 172 173 sg_init_table(sg, sg_per_table); 174 175 sg_table[i].sg_table = sg; 176 sg_table[i].rd_sg_count = sg_per_table; 177 sg_table[i].page_start_offset = page_offset; 178 sg_table[i++].page_end_offset = (page_offset + sg_per_table) 179 - 1; 180 181 for (j = 0; j < sg_per_table; j++) { 182 pg = alloc_pages(GFP_KERNEL, 0); 183 if (!pg) { 184 pr_err("Unable to allocate scatterlist" 185 " pages for struct rd_dev_sg_table\n"); 186 return -ENOMEM; 187 } 188 sg_assign_page(&sg[j], pg); 189 sg[j].length = PAGE_SIZE; 190 } 191 192 page_offset += sg_per_table; 193 total_sg_needed -= sg_per_table; 194 } 195 196 pr_debug("CORE_RD[%u] - Built Ramdisk Device ID: %u space of" 197 " %u pages in %u tables\n", rd_dev->rd_host->rd_host_id, 198 rd_dev->rd_dev_id, rd_dev->rd_page_count, 199 rd_dev->sg_table_count); 200 201 return 0; 202 } 203 204 static void *rd_allocate_virtdevice( 205 struct se_hba *hba, 206 const char *name, 207 int rd_direct) 208 { 209 struct rd_dev *rd_dev; 210 struct rd_host *rd_host = hba->hba_ptr; 211 212 rd_dev = kzalloc(sizeof(struct rd_dev), GFP_KERNEL); 213 if (!rd_dev) { 214 pr_err("Unable to allocate memory for struct rd_dev\n"); 215 return NULL; 216 } 217 218 rd_dev->rd_host = rd_host; 219 rd_dev->rd_direct = rd_direct; 220 221 return rd_dev; 222 } 223 224 static void *rd_MEMCPY_allocate_virtdevice(struct se_hba *hba, const char *name) 225 { 226 return rd_allocate_virtdevice(hba, name, 0); 227 } 228 229 /* rd_create_virtdevice(): 230 * 231 * 232 */ 233 static struct se_device *rd_create_virtdevice( 234 struct se_hba *hba, 235 struct se_subsystem_dev *se_dev, 236 void *p, 237 int rd_direct) 238 { 239 struct se_device *dev; 240 struct se_dev_limits dev_limits; 241 struct rd_dev *rd_dev = p; 242 struct rd_host *rd_host = hba->hba_ptr; 243 int dev_flags = 0, ret; 244 char prod[16], rev[4]; 245 246 memset(&dev_limits, 0, sizeof(struct se_dev_limits)); 247 248 ret = rd_build_device_space(rd_dev); 249 if (ret < 0) 250 goto fail; 251 252 snprintf(prod, 16, "RAMDISK-%s", (rd_dev->rd_direct) ? "DR" : "MCP"); 253 snprintf(rev, 4, "%s", (rd_dev->rd_direct) ? RD_DR_VERSION : 254 RD_MCP_VERSION); 255 256 dev_limits.limits.logical_block_size = RD_BLOCKSIZE; 257 dev_limits.limits.max_hw_sectors = RD_MAX_SECTORS; 258 dev_limits.limits.max_sectors = RD_MAX_SECTORS; 259 dev_limits.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH; 260 dev_limits.queue_depth = RD_DEVICE_QUEUE_DEPTH; 261 262 dev = transport_add_device_to_core_hba(hba, 263 &rd_mcp_template, se_dev, dev_flags, rd_dev, 264 &dev_limits, prod, rev); 265 if (!dev) 266 goto fail; 267 268 rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++; 269 rd_dev->rd_queue_depth = dev->queue_depth; 270 271 pr_debug("CORE_RD[%u] - Added TCM %s Ramdisk Device ID: %u of" 272 " %u pages in %u tables, %lu total bytes\n", 273 rd_host->rd_host_id, (!rd_dev->rd_direct) ? "MEMCPY" : 274 "DIRECT", rd_dev->rd_dev_id, rd_dev->rd_page_count, 275 rd_dev->sg_table_count, 276 (unsigned long)(rd_dev->rd_page_count * PAGE_SIZE)); 277 278 return dev; 279 280 fail: 281 rd_release_device_space(rd_dev); 282 return ERR_PTR(ret); 283 } 284 285 static struct se_device *rd_MEMCPY_create_virtdevice( 286 struct se_hba *hba, 287 struct se_subsystem_dev *se_dev, 288 void *p) 289 { 290 return rd_create_virtdevice(hba, se_dev, p, 0); 291 } 292 293 /* rd_free_device(): (Part of se_subsystem_api_t template) 294 * 295 * 296 */ 297 static void rd_free_device(void *p) 298 { 299 struct rd_dev *rd_dev = p; 300 301 rd_release_device_space(rd_dev); 302 kfree(rd_dev); 303 } 304 305 static inline struct rd_request *RD_REQ(struct se_task *task) 306 { 307 return container_of(task, struct rd_request, rd_task); 308 } 309 310 static struct se_task * 311 rd_alloc_task(unsigned char *cdb) 312 { 313 struct rd_request *rd_req; 314 315 rd_req = kzalloc(sizeof(struct rd_request), GFP_KERNEL); 316 if (!rd_req) { 317 pr_err("Unable to allocate struct rd_request\n"); 318 return NULL; 319 } 320 321 return &rd_req->rd_task; 322 } 323 324 /* rd_get_sg_table(): 325 * 326 * 327 */ 328 static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page) 329 { 330 u32 i; 331 struct rd_dev_sg_table *sg_table; 332 333 for (i = 0; i < rd_dev->sg_table_count; i++) { 334 sg_table = &rd_dev->sg_table_array[i]; 335 if ((sg_table->page_start_offset <= page) && 336 (sg_table->page_end_offset >= page)) 337 return sg_table; 338 } 339 340 pr_err("Unable to locate struct rd_dev_sg_table for page: %u\n", 341 page); 342 343 return NULL; 344 } 345 346 /* rd_MEMCPY_read(): 347 * 348 * 349 */ 350 static int rd_MEMCPY_read(struct rd_request *req) 351 { 352 struct se_task *task = &req->rd_task; 353 struct rd_dev *dev = req->rd_task.task_se_cmd->se_dev->dev_ptr; 354 struct rd_dev_sg_table *table; 355 struct scatterlist *sg_d, *sg_s; 356 void *dst, *src; 357 u32 i = 0, j = 0, dst_offset = 0, src_offset = 0; 358 u32 length, page_end = 0, table_sg_end; 359 u32 rd_offset = req->rd_offset; 360 361 table = rd_get_sg_table(dev, req->rd_page); 362 if (!table) 363 return -EINVAL; 364 365 table_sg_end = (table->page_end_offset - req->rd_page); 366 sg_d = task->task_sg; 367 sg_s = &table->sg_table[req->rd_page - table->page_start_offset]; 368 369 pr_debug("RD[%u]: Read LBA: %llu, Size: %u Page: %u, Offset:" 370 " %u\n", dev->rd_dev_id, task->task_lba, req->rd_size, 371 req->rd_page, req->rd_offset); 372 373 src_offset = rd_offset; 374 375 while (req->rd_size) { 376 if ((sg_d[i].length - dst_offset) < 377 (sg_s[j].length - src_offset)) { 378 length = (sg_d[i].length - dst_offset); 379 380 pr_debug("Step 1 - sg_d[%d]: %p length: %d" 381 " offset: %u sg_s[%d].length: %u\n", i, 382 &sg_d[i], sg_d[i].length, sg_d[i].offset, j, 383 sg_s[j].length); 384 pr_debug("Step 1 - length: %u dst_offset: %u" 385 " src_offset: %u\n", length, dst_offset, 386 src_offset); 387 388 if (length > req->rd_size) 389 length = req->rd_size; 390 391 dst = sg_virt(&sg_d[i++]) + dst_offset; 392 BUG_ON(!dst); 393 394 src = sg_virt(&sg_s[j]) + src_offset; 395 BUG_ON(!src); 396 397 dst_offset = 0; 398 src_offset = length; 399 page_end = 0; 400 } else { 401 length = (sg_s[j].length - src_offset); 402 403 pr_debug("Step 2 - sg_d[%d]: %p length: %d" 404 " offset: %u sg_s[%d].length: %u\n", i, 405 &sg_d[i], sg_d[i].length, sg_d[i].offset, 406 j, sg_s[j].length); 407 pr_debug("Step 2 - length: %u dst_offset: %u" 408 " src_offset: %u\n", length, dst_offset, 409 src_offset); 410 411 if (length > req->rd_size) 412 length = req->rd_size; 413 414 dst = sg_virt(&sg_d[i]) + dst_offset; 415 BUG_ON(!dst); 416 417 if (sg_d[i].length == length) { 418 i++; 419 dst_offset = 0; 420 } else 421 dst_offset = length; 422 423 src = sg_virt(&sg_s[j++]) + src_offset; 424 BUG_ON(!src); 425 426 src_offset = 0; 427 page_end = 1; 428 } 429 430 memcpy(dst, src, length); 431 432 pr_debug("page: %u, remaining size: %u, length: %u," 433 " i: %u, j: %u\n", req->rd_page, 434 (req->rd_size - length), length, i, j); 435 436 req->rd_size -= length; 437 if (!req->rd_size) 438 return 0; 439 440 if (!page_end) 441 continue; 442 443 if (++req->rd_page <= table->page_end_offset) { 444 pr_debug("page: %u in same page table\n", 445 req->rd_page); 446 continue; 447 } 448 449 pr_debug("getting new page table for page: %u\n", 450 req->rd_page); 451 452 table = rd_get_sg_table(dev, req->rd_page); 453 if (!table) 454 return -EINVAL; 455 456 sg_s = &table->sg_table[j = 0]; 457 } 458 459 return 0; 460 } 461 462 /* rd_MEMCPY_write(): 463 * 464 * 465 */ 466 static int rd_MEMCPY_write(struct rd_request *req) 467 { 468 struct se_task *task = &req->rd_task; 469 struct rd_dev *dev = req->rd_task.task_se_cmd->se_dev->dev_ptr; 470 struct rd_dev_sg_table *table; 471 struct scatterlist *sg_d, *sg_s; 472 void *dst, *src; 473 u32 i = 0, j = 0, dst_offset = 0, src_offset = 0; 474 u32 length, page_end = 0, table_sg_end; 475 u32 rd_offset = req->rd_offset; 476 477 table = rd_get_sg_table(dev, req->rd_page); 478 if (!table) 479 return -EINVAL; 480 481 table_sg_end = (table->page_end_offset - req->rd_page); 482 sg_d = &table->sg_table[req->rd_page - table->page_start_offset]; 483 sg_s = task->task_sg; 484 485 pr_debug("RD[%d] Write LBA: %llu, Size: %u, Page: %u," 486 " Offset: %u\n", dev->rd_dev_id, task->task_lba, req->rd_size, 487 req->rd_page, req->rd_offset); 488 489 dst_offset = rd_offset; 490 491 while (req->rd_size) { 492 if ((sg_s[i].length - src_offset) < 493 (sg_d[j].length - dst_offset)) { 494 length = (sg_s[i].length - src_offset); 495 496 pr_debug("Step 1 - sg_s[%d]: %p length: %d" 497 " offset: %d sg_d[%d].length: %u\n", i, 498 &sg_s[i], sg_s[i].length, sg_s[i].offset, 499 j, sg_d[j].length); 500 pr_debug("Step 1 - length: %u src_offset: %u" 501 " dst_offset: %u\n", length, src_offset, 502 dst_offset); 503 504 if (length > req->rd_size) 505 length = req->rd_size; 506 507 src = sg_virt(&sg_s[i++]) + src_offset; 508 BUG_ON(!src); 509 510 dst = sg_virt(&sg_d[j]) + dst_offset; 511 BUG_ON(!dst); 512 513 src_offset = 0; 514 dst_offset = length; 515 page_end = 0; 516 } else { 517 length = (sg_d[j].length - dst_offset); 518 519 pr_debug("Step 2 - sg_s[%d]: %p length: %d" 520 " offset: %d sg_d[%d].length: %u\n", i, 521 &sg_s[i], sg_s[i].length, sg_s[i].offset, 522 j, sg_d[j].length); 523 pr_debug("Step 2 - length: %u src_offset: %u" 524 " dst_offset: %u\n", length, src_offset, 525 dst_offset); 526 527 if (length > req->rd_size) 528 length = req->rd_size; 529 530 src = sg_virt(&sg_s[i]) + src_offset; 531 BUG_ON(!src); 532 533 if (sg_s[i].length == length) { 534 i++; 535 src_offset = 0; 536 } else 537 src_offset = length; 538 539 dst = sg_virt(&sg_d[j++]) + dst_offset; 540 BUG_ON(!dst); 541 542 dst_offset = 0; 543 page_end = 1; 544 } 545 546 memcpy(dst, src, length); 547 548 pr_debug("page: %u, remaining size: %u, length: %u," 549 " i: %u, j: %u\n", req->rd_page, 550 (req->rd_size - length), length, i, j); 551 552 req->rd_size -= length; 553 if (!req->rd_size) 554 return 0; 555 556 if (!page_end) 557 continue; 558 559 if (++req->rd_page <= table->page_end_offset) { 560 pr_debug("page: %u in same page table\n", 561 req->rd_page); 562 continue; 563 } 564 565 pr_debug("getting new page table for page: %u\n", 566 req->rd_page); 567 568 table = rd_get_sg_table(dev, req->rd_page); 569 if (!table) 570 return -EINVAL; 571 572 sg_d = &table->sg_table[j = 0]; 573 } 574 575 return 0; 576 } 577 578 /* rd_MEMCPY_do_task(): (Part of se_subsystem_api_t template) 579 * 580 * 581 */ 582 static int rd_MEMCPY_do_task(struct se_task *task) 583 { 584 struct se_device *dev = task->task_se_cmd->se_dev; 585 struct rd_request *req = RD_REQ(task); 586 unsigned long long lba; 587 int ret; 588 589 req->rd_page = (task->task_lba * dev->se_sub_dev->se_dev_attrib.block_size) / PAGE_SIZE; 590 lba = task->task_lba; 591 req->rd_offset = (do_div(lba, 592 (PAGE_SIZE / dev->se_sub_dev->se_dev_attrib.block_size))) * 593 dev->se_sub_dev->se_dev_attrib.block_size; 594 req->rd_size = task->task_size; 595 596 if (task->task_data_direction == DMA_FROM_DEVICE) 597 ret = rd_MEMCPY_read(req); 598 else 599 ret = rd_MEMCPY_write(req); 600 601 if (ret != 0) 602 return ret; 603 604 task->task_scsi_status = GOOD; 605 transport_complete_task(task, 1); 606 607 return PYX_TRANSPORT_SENT_TO_TRANSPORT; 608 } 609 610 /* rd_free_task(): (Part of se_subsystem_api_t template) 611 * 612 * 613 */ 614 static void rd_free_task(struct se_task *task) 615 { 616 kfree(RD_REQ(task)); 617 } 618 619 enum { 620 Opt_rd_pages, Opt_err 621 }; 622 623 static match_table_t tokens = { 624 {Opt_rd_pages, "rd_pages=%d"}, 625 {Opt_err, NULL} 626 }; 627 628 static ssize_t rd_set_configfs_dev_params( 629 struct se_hba *hba, 630 struct se_subsystem_dev *se_dev, 631 const char *page, 632 ssize_t count) 633 { 634 struct rd_dev *rd_dev = se_dev->se_dev_su_ptr; 635 char *orig, *ptr, *opts; 636 substring_t args[MAX_OPT_ARGS]; 637 int ret = 0, arg, token; 638 639 opts = kstrdup(page, GFP_KERNEL); 640 if (!opts) 641 return -ENOMEM; 642 643 orig = opts; 644 645 while ((ptr = strsep(&opts, ",")) != NULL) { 646 if (!*ptr) 647 continue; 648 649 token = match_token(ptr, tokens, args); 650 switch (token) { 651 case Opt_rd_pages: 652 match_int(args, &arg); 653 rd_dev->rd_page_count = arg; 654 pr_debug("RAMDISK: Referencing Page" 655 " Count: %u\n", rd_dev->rd_page_count); 656 rd_dev->rd_flags |= RDF_HAS_PAGE_COUNT; 657 break; 658 default: 659 break; 660 } 661 } 662 663 kfree(orig); 664 return (!ret) ? count : ret; 665 } 666 667 static ssize_t rd_check_configfs_dev_params(struct se_hba *hba, struct se_subsystem_dev *se_dev) 668 { 669 struct rd_dev *rd_dev = se_dev->se_dev_su_ptr; 670 671 if (!(rd_dev->rd_flags & RDF_HAS_PAGE_COUNT)) { 672 pr_debug("Missing rd_pages= parameter\n"); 673 return -EINVAL; 674 } 675 676 return 0; 677 } 678 679 static ssize_t rd_show_configfs_dev_params( 680 struct se_hba *hba, 681 struct se_subsystem_dev *se_dev, 682 char *b) 683 { 684 struct rd_dev *rd_dev = se_dev->se_dev_su_ptr; 685 ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: %s\n", 686 rd_dev->rd_dev_id, (rd_dev->rd_direct) ? 687 "rd_direct" : "rd_mcp"); 688 bl += sprintf(b + bl, " PAGES/PAGE_SIZE: %u*%lu" 689 " SG_table_count: %u\n", rd_dev->rd_page_count, 690 PAGE_SIZE, rd_dev->sg_table_count); 691 return bl; 692 } 693 694 static u32 rd_get_device_rev(struct se_device *dev) 695 { 696 return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */ 697 } 698 699 static u32 rd_get_device_type(struct se_device *dev) 700 { 701 return TYPE_DISK; 702 } 703 704 static sector_t rd_get_blocks(struct se_device *dev) 705 { 706 struct rd_dev *rd_dev = dev->dev_ptr; 707 unsigned long long blocks_long = ((rd_dev->rd_page_count * PAGE_SIZE) / 708 dev->se_sub_dev->se_dev_attrib.block_size) - 1; 709 710 return blocks_long; 711 } 712 713 static struct se_subsystem_api rd_mcp_template = { 714 .name = "rd_mcp", 715 .transport_type = TRANSPORT_PLUGIN_VHBA_VDEV, 716 .attach_hba = rd_attach_hba, 717 .detach_hba = rd_detach_hba, 718 .allocate_virtdevice = rd_MEMCPY_allocate_virtdevice, 719 .create_virtdevice = rd_MEMCPY_create_virtdevice, 720 .free_device = rd_free_device, 721 .alloc_task = rd_alloc_task, 722 .do_task = rd_MEMCPY_do_task, 723 .free_task = rd_free_task, 724 .check_configfs_dev_params = rd_check_configfs_dev_params, 725 .set_configfs_dev_params = rd_set_configfs_dev_params, 726 .show_configfs_dev_params = rd_show_configfs_dev_params, 727 .get_device_rev = rd_get_device_rev, 728 .get_device_type = rd_get_device_type, 729 .get_blocks = rd_get_blocks, 730 }; 731 732 int __init rd_module_init(void) 733 { 734 int ret; 735 736 ret = transport_subsystem_register(&rd_mcp_template); 737 if (ret < 0) { 738 return ret; 739 } 740 741 return 0; 742 } 743 744 void rd_module_exit(void) 745 { 746 transport_subsystem_release(&rd_mcp_template); 747 } 748