Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 46 | static struct se_subsystem_api rd_mcp_template; |
| 47 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 57 | if (!rd_host) { |
| 58 | pr_err("Unable to allocate memory for struct rd_host\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 59 | return -ENOMEM; |
| 60 | } |
| 61 | |
| 62 | rd_host->rd_host_id = host_id; |
| 63 | |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 64 | hba->hba_ptr = rd_host; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 65 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 66 | pr_debug("CORE_HBA[%d] - TCM Ramdisk HBA Driver %s on" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 67 | " Generic Target Core Stack %s\n", hba->hba_id, |
| 68 | RD_HBA_VERSION, TARGET_CORE_MOD_VERSION); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 69 | pr_debug("CORE_HBA[%d] - Attached Ramdisk HBA: %u to Generic" |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 70 | " MaxSectors: %u\n", hba->hba_id, |
| 71 | rd_host->rd_host_id, RD_MAX_SECTORS); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 80 | pr_debug("CORE_HBA[%d] - Detached Ramdisk HBA: %u from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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]); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 109 | if (pg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 110 | __free_page(pg); |
| 111 | page_count++; |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | kfree(sg); |
| 116 | } |
| 117 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 118 | pr_debug("CORE_RD[%u] - Released device space for Ramdisk" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 143 | pr_err("Illegal page count: %u for Ramdisk device\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 144 | rd_dev->rd_page_count); |
Dan Carpenter | 065f971 | 2011-03-14 04:06:03 -0700 | [diff] [blame] | 145 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 152 | if (!sg_table) { |
| 153 | pr_err("Unable to allocate memory for Ramdisk" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 154 | " scatterlist tables\n"); |
Dan Carpenter | 065f971 | 2011-03-14 04:06:03 -0700 | [diff] [blame] | 155 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 167 | if (!sg) { |
| 168 | pr_err("Unable to allocate scatterlist array" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 169 | " for struct rd_dev\n"); |
Dan Carpenter | 065f971 | 2011-03-14 04:06:03 -0700 | [diff] [blame] | 170 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 171 | } |
| 172 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 173 | sg_init_table(sg, sg_per_table); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 183 | if (!pg) { |
| 184 | pr_err("Unable to allocate scatterlist" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 185 | " pages for struct rd_dev_sg_table\n"); |
Dan Carpenter | 065f971 | 2011-03-14 04:06:03 -0700 | [diff] [blame] | 186 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 196 | pr_debug("CORE_RD[%u] - Built Ramdisk Device ID: %u space of" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 213 | if (!rd_dev) { |
| 214 | pr_err("Unable to allocate memory for struct rd_dev\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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; |
Dan Carpenter | 065f971 | 2011-03-14 04:06:03 -0700 | [diff] [blame] | 243 | int dev_flags = 0, ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 244 | char prod[16], rev[4]; |
| 245 | |
| 246 | memset(&dev_limits, 0, sizeof(struct se_dev_limits)); |
| 247 | |
Dan Carpenter | 065f971 | 2011-03-14 04:06:03 -0700 | [diff] [blame] | 248 | ret = rd_build_device_space(rd_dev); |
| 249 | if (ret < 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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, |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 263 | &rd_mcp_template, se_dev, dev_flags, rd_dev, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 264 | &dev_limits, prod, rev); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 265 | if (!dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 271 | pr_debug("CORE_RD[%u] - Added TCM %s Ramdisk Device ID: %u of" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Nicholas Bellinger | 613640e | 2011-03-14 04:05:59 -0700 | [diff] [blame] | 282 | return ERR_PTR(ret); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 283 | } |
| 284 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 * |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 311 | rd_alloc_task(unsigned char *cdb) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 312 | { |
| 313 | struct rd_request *rd_req; |
| 314 | |
| 315 | rd_req = kzalloc(sizeof(struct rd_request), GFP_KERNEL); |
| 316 | if (!rd_req) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 317 | pr_err("Unable to allocate struct rd_request\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 318 | return NULL; |
| 319 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 340 | pr_err("Unable to locate struct rd_dev_sg_table for page: %u\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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; |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 353 | struct rd_dev *dev = req->rd_task.task_se_cmd->se_dev->dev_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 362 | if (!table) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 363 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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]; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 368 | |
| 369 | pr_debug("RD[%u]: Read LBA: %llu, Size: %u Page: %u, Offset:" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 370 | " %u\n", dev->rd_dev_id, task->task_lba, req->rd_size, |
| 371 | req->rd_page, req->rd_offset); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 372 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 379 | |
| 380 | pr_debug("Step 1 - sg_d[%d]: %p length: %d" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 384 | pr_debug("Step 1 - length: %u dst_offset: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 385 | " src_offset: %u\n", length, dst_offset, |
| 386 | src_offset); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 387 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 388 | if (length > req->rd_size) |
| 389 | length = req->rd_size; |
| 390 | |
| 391 | dst = sg_virt(&sg_d[i++]) + dst_offset; |
Julia Lawall | 6fc6148 | 2011-08-02 12:35:02 +0200 | [diff] [blame] | 392 | BUG_ON(!dst); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 393 | |
| 394 | src = sg_virt(&sg_s[j]) + src_offset; |
Julia Lawall | 6fc6148 | 2011-08-02 12:35:02 +0200 | [diff] [blame] | 395 | BUG_ON(!src); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 396 | |
| 397 | dst_offset = 0; |
| 398 | src_offset = length; |
| 399 | page_end = 0; |
| 400 | } else { |
| 401 | length = (sg_s[j].length - src_offset); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 402 | |
| 403 | pr_debug("Step 2 - sg_d[%d]: %p length: %d" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 407 | pr_debug("Step 2 - length: %u dst_offset: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 408 | " src_offset: %u\n", length, dst_offset, |
| 409 | src_offset); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 410 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 411 | if (length > req->rd_size) |
| 412 | length = req->rd_size; |
| 413 | |
| 414 | dst = sg_virt(&sg_d[i]) + dst_offset; |
Julia Lawall | 6fc6148 | 2011-08-02 12:35:02 +0200 | [diff] [blame] | 415 | BUG_ON(!dst); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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; |
Julia Lawall | 6fc6148 | 2011-08-02 12:35:02 +0200 | [diff] [blame] | 424 | BUG_ON(!src); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 425 | |
| 426 | src_offset = 0; |
| 427 | page_end = 1; |
| 428 | } |
| 429 | |
| 430 | memcpy(dst, src, length); |
| 431 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 432 | pr_debug("page: %u, remaining size: %u, length: %u," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 433 | " i: %u, j: %u\n", req->rd_page, |
| 434 | (req->rd_size - length), length, i, j); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 435 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 436 | req->rd_size -= length; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 437 | if (!req->rd_size) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 438 | return 0; |
| 439 | |
| 440 | if (!page_end) |
| 441 | continue; |
| 442 | |
| 443 | if (++req->rd_page <= table->page_end_offset) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 444 | pr_debug("page: %u in same page table\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 445 | req->rd_page); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 446 | continue; |
| 447 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 448 | |
| 449 | pr_debug("getting new page table for page: %u\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 450 | req->rd_page); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 451 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 452 | table = rd_get_sg_table(dev, req->rd_page); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 453 | if (!table) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 454 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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; |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 469 | struct rd_dev *dev = req->rd_task.task_se_cmd->se_dev->dev_ptr; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 478 | if (!table) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 479 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 484 | |
| 485 | pr_debug("RD[%d] Write LBA: %llu, Size: %u, Page: %u," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 486 | " Offset: %u\n", dev->rd_dev_id, task->task_lba, req->rd_size, |
| 487 | req->rd_page, req->rd_offset); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 488 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 495 | |
| 496 | pr_debug("Step 1 - sg_s[%d]: %p length: %d" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 500 | pr_debug("Step 1 - length: %u src_offset: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 501 | " dst_offset: %u\n", length, src_offset, |
| 502 | dst_offset); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 503 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 504 | if (length > req->rd_size) |
| 505 | length = req->rd_size; |
| 506 | |
| 507 | src = sg_virt(&sg_s[i++]) + src_offset; |
Julia Lawall | 6fc6148 | 2011-08-02 12:35:02 +0200 | [diff] [blame] | 508 | BUG_ON(!src); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 509 | |
| 510 | dst = sg_virt(&sg_d[j]) + dst_offset; |
Julia Lawall | 6fc6148 | 2011-08-02 12:35:02 +0200 | [diff] [blame] | 511 | BUG_ON(!dst); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 512 | |
| 513 | src_offset = 0; |
| 514 | dst_offset = length; |
| 515 | page_end = 0; |
| 516 | } else { |
| 517 | length = (sg_d[j].length - dst_offset); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 518 | |
| 519 | pr_debug("Step 2 - sg_s[%d]: %p length: %d" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 523 | pr_debug("Step 2 - length: %u src_offset: %u" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 524 | " dst_offset: %u\n", length, src_offset, |
| 525 | dst_offset); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 526 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 527 | if (length > req->rd_size) |
| 528 | length = req->rd_size; |
| 529 | |
| 530 | src = sg_virt(&sg_s[i]) + src_offset; |
Julia Lawall | 6fc6148 | 2011-08-02 12:35:02 +0200 | [diff] [blame] | 531 | BUG_ON(!src); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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; |
Julia Lawall | 6fc6148 | 2011-08-02 12:35:02 +0200 | [diff] [blame] | 540 | BUG_ON(!dst); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 541 | |
| 542 | dst_offset = 0; |
| 543 | page_end = 1; |
| 544 | } |
| 545 | |
| 546 | memcpy(dst, src, length); |
| 547 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 548 | pr_debug("page: %u, remaining size: %u, length: %u," |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 549 | " i: %u, j: %u\n", req->rd_page, |
| 550 | (req->rd_size - length), length, i, j); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 551 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 552 | req->rd_size -= length; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 553 | if (!req->rd_size) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 554 | return 0; |
| 555 | |
| 556 | if (!page_end) |
| 557 | continue; |
| 558 | |
| 559 | if (++req->rd_page <= table->page_end_offset) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 560 | pr_debug("page: %u in same page table\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 561 | req->rd_page); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 562 | continue; |
| 563 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 564 | |
| 565 | pr_debug("getting new page table for page: %u\n", |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 566 | req->rd_page); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 567 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 568 | table = rd_get_sg_table(dev, req->rd_page); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 569 | if (!table) |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 570 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 | { |
Christoph Hellwig | 42bf829 | 2011-10-12 11:07:00 -0400 | [diff] [blame] | 584 | struct se_device *dev = task->task_se_cmd->se_dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 585 | struct rd_request *req = RD_REQ(task); |
| 586 | unsigned long long lba; |
| 587 | int ret; |
| 588 | |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 589 | req->rd_page = (task->task_lba * dev->se_sub_dev->se_dev_attrib.block_size) / PAGE_SIZE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 590 | lba = task->task_lba; |
| 591 | req->rd_offset = (do_div(lba, |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 592 | (PAGE_SIZE / dev->se_sub_dev->se_dev_attrib.block_size))) * |
| 593 | dev->se_sub_dev->se_dev_attrib.block_size; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 654 | pr_debug("RAMDISK: Referencing Page" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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)) { |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 672 | pr_debug("Missing rd_pages= parameter\n"); |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 673 | return -EINVAL; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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) / |
Andy Grover | e3d6f90 | 2011-07-19 08:55:10 +0000 | [diff] [blame] | 708 | dev->se_sub_dev->se_dev_attrib.block_size) - 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 709 | |
| 710 | return blocks_long; |
| 711 | } |
| 712 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 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 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 736 | ret = transport_subsystem_register(&rd_mcp_template); |
| 737 | if (ret < 0) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 738 | return ret; |
| 739 | } |
| 740 | |
| 741 | return 0; |
| 742 | } |
| 743 | |
| 744 | void rd_module_exit(void) |
| 745 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 746 | transport_subsystem_release(&rd_mcp_template); |
| 747 | } |