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 | * |
Nicholas Bellinger | 4c76251 | 2013-09-05 15:29:12 -0700 | [diff] [blame] | 7 | * (c) Copyright 2003-2013 Datera, Inc. |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 8 | * |
| 9 | * Nicholas A. Bellinger <nab@kernel.org> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 24 | * |
| 25 | ******************************************************************************/ |
| 26 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 27 | #include <linux/string.h> |
| 28 | #include <linux/parser.h> |
| 29 | #include <linux/timer.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 30 | #include <linux/slab.h> |
| 31 | #include <linux/spinlock.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 32 | #include <scsi/scsi.h> |
| 33 | #include <scsi/scsi_host.h> |
| 34 | |
| 35 | #include <target/target_core_base.h> |
Christoph Hellwig | c4795fb | 2011-11-16 09:46:48 -0500 | [diff] [blame] | 36 | #include <target/target_core_backend.h> |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 37 | |
| 38 | #include "target_core_rd.h" |
| 39 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 40 | static inline struct rd_dev *RD_DEV(struct se_device *dev) |
| 41 | { |
| 42 | return container_of(dev, struct rd_dev, dev); |
| 43 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 44 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 45 | /* rd_attach_hba(): (Part of se_subsystem_api_t template) |
| 46 | * |
| 47 | * |
| 48 | */ |
| 49 | static int rd_attach_hba(struct se_hba *hba, u32 host_id) |
| 50 | { |
| 51 | struct rd_host *rd_host; |
| 52 | |
| 53 | rd_host = kzalloc(sizeof(struct rd_host), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 54 | if (!rd_host) { |
| 55 | pr_err("Unable to allocate memory for struct rd_host\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 56 | return -ENOMEM; |
| 57 | } |
| 58 | |
| 59 | rd_host->rd_host_id = host_id; |
| 60 | |
Andy Grover | 5951146d | 2011-07-19 10:26:37 +0000 | [diff] [blame] | 61 | hba->hba_ptr = rd_host; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 62 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 63 | pr_debug("CORE_HBA[%d] - TCM Ramdisk HBA Driver %s on" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 64 | " Generic Target Core Stack %s\n", hba->hba_id, |
| 65 | RD_HBA_VERSION, TARGET_CORE_MOD_VERSION); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 66 | |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | static void rd_detach_hba(struct se_hba *hba) |
| 71 | { |
| 72 | struct rd_host *rd_host = hba->hba_ptr; |
| 73 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 74 | pr_debug("CORE_HBA[%d] - Detached Ramdisk HBA: %u from" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 75 | " Generic Target Core\n", hba->hba_id, rd_host->rd_host_id); |
| 76 | |
| 77 | kfree(rd_host); |
| 78 | hba->hba_ptr = NULL; |
| 79 | } |
| 80 | |
Nicholas Bellinger | 4442dc8 | 2014-01-07 22:40:27 +0000 | [diff] [blame] | 81 | static u32 rd_release_sgl_table(struct rd_dev *rd_dev, struct rd_dev_sg_table *sg_table, |
| 82 | u32 sg_table_count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 83 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 84 | struct page *pg; |
| 85 | struct scatterlist *sg; |
Nicholas Bellinger | 4442dc8 | 2014-01-07 22:40:27 +0000 | [diff] [blame] | 86 | u32 i, j, page_count = 0, sg_per_table; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 87 | |
Nicholas Bellinger | 4442dc8 | 2014-01-07 22:40:27 +0000 | [diff] [blame] | 88 | for (i = 0; i < sg_table_count; i++) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 89 | sg = sg_table[i].sg_table; |
| 90 | sg_per_table = sg_table[i].rd_sg_count; |
| 91 | |
| 92 | for (j = 0; j < sg_per_table; j++) { |
| 93 | pg = sg_page(&sg[j]); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 94 | if (pg) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 95 | __free_page(pg); |
| 96 | page_count++; |
| 97 | } |
| 98 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 99 | kfree(sg); |
| 100 | } |
| 101 | |
Nicholas Bellinger | 4442dc8 | 2014-01-07 22:40:27 +0000 | [diff] [blame] | 102 | kfree(sg_table); |
| 103 | return page_count; |
| 104 | } |
| 105 | |
| 106 | static void rd_release_device_space(struct rd_dev *rd_dev) |
| 107 | { |
| 108 | u32 page_count; |
| 109 | |
| 110 | if (!rd_dev->sg_table_array || !rd_dev->sg_table_count) |
| 111 | return; |
| 112 | |
| 113 | page_count = rd_release_sgl_table(rd_dev, rd_dev->sg_table_array, |
| 114 | rd_dev->sg_table_count); |
| 115 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 116 | pr_debug("CORE_RD[%u] - Released device space for Ramdisk" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 117 | " Device ID: %u, pages %u in %u tables total bytes %lu\n", |
| 118 | rd_dev->rd_host->rd_host_id, rd_dev->rd_dev_id, page_count, |
| 119 | rd_dev->sg_table_count, (unsigned long)page_count * PAGE_SIZE); |
| 120 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 121 | rd_dev->sg_table_array = NULL; |
| 122 | rd_dev->sg_table_count = 0; |
| 123 | } |
| 124 | |
| 125 | |
| 126 | /* rd_build_device_space(): |
| 127 | * |
| 128 | * |
| 129 | */ |
Nicholas Bellinger | 4442dc8 | 2014-01-07 22:40:27 +0000 | [diff] [blame] | 130 | static int rd_allocate_sgl_table(struct rd_dev *rd_dev, struct rd_dev_sg_table *sg_table, |
| 131 | u32 total_sg_needed, unsigned char init_payload) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 132 | { |
Nicholas Bellinger | 4442dc8 | 2014-01-07 22:40:27 +0000 | [diff] [blame] | 133 | u32 i = 0, j, page_offset = 0, sg_per_table; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 134 | u32 max_sg_per_table = (RD_MAX_ALLOCATION_SIZE / |
| 135 | sizeof(struct scatterlist)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 136 | struct page *pg; |
| 137 | struct scatterlist *sg; |
Nicholas Bellinger | 4442dc8 | 2014-01-07 22:40:27 +0000 | [diff] [blame] | 138 | unsigned char *p; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 139 | |
| 140 | while (total_sg_needed) { |
| 141 | sg_per_table = (total_sg_needed > max_sg_per_table) ? |
| 142 | max_sg_per_table : total_sg_needed; |
| 143 | |
| 144 | sg = kzalloc(sg_per_table * sizeof(struct scatterlist), |
| 145 | GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 146 | if (!sg) { |
| 147 | pr_err("Unable to allocate scatterlist array" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 148 | " for struct rd_dev\n"); |
Dan Carpenter | 065f971 | 2011-03-14 04:06:03 -0700 | [diff] [blame] | 149 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 150 | } |
| 151 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 152 | sg_init_table(sg, sg_per_table); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 153 | |
| 154 | sg_table[i].sg_table = sg; |
| 155 | sg_table[i].rd_sg_count = sg_per_table; |
| 156 | sg_table[i].page_start_offset = page_offset; |
| 157 | sg_table[i++].page_end_offset = (page_offset + sg_per_table) |
| 158 | - 1; |
| 159 | |
| 160 | for (j = 0; j < sg_per_table; j++) { |
| 161 | pg = alloc_pages(GFP_KERNEL, 0); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 162 | if (!pg) { |
| 163 | pr_err("Unable to allocate scatterlist" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 164 | " pages for struct rd_dev_sg_table\n"); |
Dan Carpenter | 065f971 | 2011-03-14 04:06:03 -0700 | [diff] [blame] | 165 | return -ENOMEM; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 166 | } |
| 167 | sg_assign_page(&sg[j], pg); |
| 168 | sg[j].length = PAGE_SIZE; |
Nicholas Bellinger | 4442dc8 | 2014-01-07 22:40:27 +0000 | [diff] [blame] | 169 | |
| 170 | p = kmap(pg); |
| 171 | memset(p, init_payload, PAGE_SIZE); |
| 172 | kunmap(pg); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | page_offset += sg_per_table; |
| 176 | total_sg_needed -= sg_per_table; |
| 177 | } |
| 178 | |
Nicholas Bellinger | 4442dc8 | 2014-01-07 22:40:27 +0000 | [diff] [blame] | 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | static int rd_build_device_space(struct rd_dev *rd_dev) |
| 183 | { |
| 184 | struct rd_dev_sg_table *sg_table; |
| 185 | u32 sg_tables, total_sg_needed; |
| 186 | u32 max_sg_per_table = (RD_MAX_ALLOCATION_SIZE / |
| 187 | sizeof(struct scatterlist)); |
| 188 | int rc; |
| 189 | |
| 190 | if (rd_dev->rd_page_count <= 0) { |
| 191 | pr_err("Illegal page count: %u for Ramdisk device\n", |
| 192 | rd_dev->rd_page_count); |
| 193 | return -EINVAL; |
| 194 | } |
| 195 | |
| 196 | /* Don't need backing pages for NULLIO */ |
| 197 | if (rd_dev->rd_flags & RDF_NULLIO) |
| 198 | return 0; |
| 199 | |
| 200 | total_sg_needed = rd_dev->rd_page_count; |
| 201 | |
| 202 | sg_tables = (total_sg_needed / max_sg_per_table) + 1; |
| 203 | |
| 204 | sg_table = kzalloc(sg_tables * sizeof(struct rd_dev_sg_table), GFP_KERNEL); |
| 205 | if (!sg_table) { |
| 206 | pr_err("Unable to allocate memory for Ramdisk" |
| 207 | " scatterlist tables\n"); |
| 208 | return -ENOMEM; |
| 209 | } |
| 210 | |
| 211 | rd_dev->sg_table_array = sg_table; |
| 212 | rd_dev->sg_table_count = sg_tables; |
| 213 | |
| 214 | rc = rd_allocate_sgl_table(rd_dev, sg_table, total_sg_needed, 0x00); |
| 215 | if (rc) |
| 216 | return rc; |
| 217 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 218 | pr_debug("CORE_RD[%u] - Built Ramdisk Device ID: %u space of" |
Nicholas Bellinger | 4442dc8 | 2014-01-07 22:40:27 +0000 | [diff] [blame] | 219 | " %u pages in %u tables\n", rd_dev->rd_host->rd_host_id, |
| 220 | rd_dev->rd_dev_id, rd_dev->rd_page_count, |
| 221 | rd_dev->sg_table_count); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 222 | |
| 223 | return 0; |
| 224 | } |
| 225 | |
Nicholas Bellinger | d7e8eb5 | 2014-01-07 23:24:14 +0000 | [diff] [blame] | 226 | static void rd_release_prot_space(struct rd_dev *rd_dev) |
| 227 | { |
| 228 | u32 page_count; |
| 229 | |
| 230 | if (!rd_dev->sg_prot_array || !rd_dev->sg_prot_count) |
| 231 | return; |
| 232 | |
| 233 | page_count = rd_release_sgl_table(rd_dev, rd_dev->sg_prot_array, |
| 234 | rd_dev->sg_prot_count); |
| 235 | |
| 236 | pr_debug("CORE_RD[%u] - Released protection space for Ramdisk" |
| 237 | " Device ID: %u, pages %u in %u tables total bytes %lu\n", |
| 238 | rd_dev->rd_host->rd_host_id, rd_dev->rd_dev_id, page_count, |
| 239 | rd_dev->sg_table_count, (unsigned long)page_count * PAGE_SIZE); |
| 240 | |
| 241 | rd_dev->sg_prot_array = NULL; |
| 242 | rd_dev->sg_prot_count = 0; |
| 243 | } |
| 244 | |
| 245 | static int rd_build_prot_space(struct rd_dev *rd_dev, int prot_length) |
| 246 | { |
| 247 | struct rd_dev_sg_table *sg_table; |
| 248 | u32 total_sg_needed, sg_tables; |
| 249 | u32 max_sg_per_table = (RD_MAX_ALLOCATION_SIZE / |
| 250 | sizeof(struct scatterlist)); |
| 251 | int rc; |
| 252 | |
| 253 | if (rd_dev->rd_flags & RDF_NULLIO) |
| 254 | return 0; |
| 255 | |
| 256 | total_sg_needed = rd_dev->rd_page_count / prot_length; |
| 257 | |
| 258 | sg_tables = (total_sg_needed / max_sg_per_table) + 1; |
| 259 | |
| 260 | sg_table = kzalloc(sg_tables * sizeof(struct rd_dev_sg_table), GFP_KERNEL); |
| 261 | if (!sg_table) { |
| 262 | pr_err("Unable to allocate memory for Ramdisk protection" |
| 263 | " scatterlist tables\n"); |
| 264 | return -ENOMEM; |
| 265 | } |
| 266 | |
| 267 | rd_dev->sg_prot_array = sg_table; |
| 268 | rd_dev->sg_prot_count = sg_tables; |
| 269 | |
| 270 | rc = rd_allocate_sgl_table(rd_dev, sg_table, total_sg_needed, 0xff); |
| 271 | if (rc) |
| 272 | return rc; |
| 273 | |
| 274 | pr_debug("CORE_RD[%u] - Built Ramdisk Device ID: %u prot space of" |
| 275 | " %u pages in %u tables\n", rd_dev->rd_host->rd_host_id, |
| 276 | rd_dev->rd_dev_id, total_sg_needed, rd_dev->sg_prot_count); |
| 277 | |
| 278 | return 0; |
| 279 | } |
| 280 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 281 | static struct se_device *rd_alloc_device(struct se_hba *hba, const char *name) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 282 | { |
| 283 | struct rd_dev *rd_dev; |
| 284 | struct rd_host *rd_host = hba->hba_ptr; |
| 285 | |
| 286 | rd_dev = kzalloc(sizeof(struct rd_dev), GFP_KERNEL); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 287 | if (!rd_dev) { |
| 288 | pr_err("Unable to allocate memory for struct rd_dev\n"); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 289 | return NULL; |
| 290 | } |
| 291 | |
| 292 | rd_dev->rd_host = rd_host; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 293 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 294 | return &rd_dev->dev; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 295 | } |
| 296 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 297 | static int rd_configure_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 298 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 299 | struct rd_dev *rd_dev = RD_DEV(dev); |
| 300 | struct rd_host *rd_host = dev->se_hba->hba_ptr; |
| 301 | int ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 302 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 303 | if (!(rd_dev->rd_flags & RDF_HAS_PAGE_COUNT)) { |
| 304 | pr_debug("Missing rd_pages= parameter\n"); |
| 305 | return -EINVAL; |
| 306 | } |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 307 | |
Dan Carpenter | 065f971 | 2011-03-14 04:06:03 -0700 | [diff] [blame] | 308 | ret = rd_build_device_space(rd_dev); |
| 309 | if (ret < 0) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 310 | goto fail; |
| 311 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 312 | dev->dev_attrib.hw_block_size = RD_BLOCKSIZE; |
| 313 | dev->dev_attrib.hw_max_sectors = UINT_MAX; |
| 314 | dev->dev_attrib.hw_queue_depth = RD_MAX_DEVICE_QUEUE_DEPTH; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 315 | |
| 316 | rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 317 | |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 318 | pr_debug("CORE_RD[%u] - Added TCM MEMCPY Ramdisk Device ID: %u of" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 319 | " %u pages in %u tables, %lu total bytes\n", |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 320 | rd_host->rd_host_id, rd_dev->rd_dev_id, rd_dev->rd_page_count, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 321 | rd_dev->sg_table_count, |
| 322 | (unsigned long)(rd_dev->rd_page_count * PAGE_SIZE)); |
| 323 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 324 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 325 | |
| 326 | fail: |
| 327 | rd_release_device_space(rd_dev); |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 328 | return ret; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 329 | } |
| 330 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 331 | static void rd_free_device(struct se_device *dev) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 332 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 333 | struct rd_dev *rd_dev = RD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 334 | |
| 335 | rd_release_device_space(rd_dev); |
| 336 | kfree(rd_dev); |
| 337 | } |
| 338 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 339 | static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page) |
| 340 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 341 | struct rd_dev_sg_table *sg_table; |
Martin Svec | 8f67835 | 2013-01-15 12:43:35 -0800 | [diff] [blame] | 342 | u32 i, sg_per_table = (RD_MAX_ALLOCATION_SIZE / |
| 343 | sizeof(struct scatterlist)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 344 | |
Martin Svec | 8f67835 | 2013-01-15 12:43:35 -0800 | [diff] [blame] | 345 | i = page / sg_per_table; |
| 346 | if (i < rd_dev->sg_table_count) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 347 | sg_table = &rd_dev->sg_table_array[i]; |
| 348 | if ((sg_table->page_start_offset <= page) && |
| 349 | (sg_table->page_end_offset >= page)) |
| 350 | return sg_table; |
| 351 | } |
| 352 | |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 353 | 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] | 354 | page); |
| 355 | |
| 356 | return NULL; |
| 357 | } |
| 358 | |
Nicholas Bellinger | 6e61111 | 2014-01-08 12:06:30 +0000 | [diff] [blame] | 359 | static struct rd_dev_sg_table *rd_get_prot_table(struct rd_dev *rd_dev, u32 page) |
| 360 | { |
| 361 | struct rd_dev_sg_table *sg_table; |
| 362 | u32 i, sg_per_table = (RD_MAX_ALLOCATION_SIZE / |
| 363 | sizeof(struct scatterlist)); |
| 364 | |
| 365 | i = page / sg_per_table; |
| 366 | if (i < rd_dev->sg_prot_count) { |
| 367 | sg_table = &rd_dev->sg_prot_array[i]; |
| 368 | if ((sg_table->page_start_offset <= page) && |
| 369 | (sg_table->page_end_offset >= page)) |
| 370 | return sg_table; |
| 371 | } |
| 372 | |
| 373 | pr_err("Unable to locate struct prot rd_dev_sg_table for page: %u\n", |
| 374 | page); |
| 375 | |
| 376 | return NULL; |
| 377 | } |
| 378 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 379 | static sense_reason_t |
Nicholas Bellinger | a82a953 | 2013-08-19 23:57:30 -0700 | [diff] [blame] | 380 | rd_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, |
| 381 | enum dma_data_direction data_direction) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 382 | { |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 383 | struct se_device *se_dev = cmd->se_dev; |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 384 | struct rd_dev *dev = RD_DEV(se_dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 385 | struct rd_dev_sg_table *table; |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 386 | struct scatterlist *rd_sg; |
| 387 | struct sg_mapping_iter m; |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 388 | u32 rd_offset; |
| 389 | u32 rd_size; |
| 390 | u32 rd_page; |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 391 | u32 src_len; |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 392 | u64 tmp; |
Nicholas Bellinger | 6e61111 | 2014-01-08 12:06:30 +0000 | [diff] [blame] | 393 | sense_reason_t rc; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 394 | |
Nicholas Bellinger | 52c0742 | 2013-05-11 16:16:49 -0700 | [diff] [blame] | 395 | if (dev->rd_flags & RDF_NULLIO) { |
| 396 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
| 397 | return 0; |
| 398 | } |
| 399 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 400 | tmp = cmd->t_task_lba * se_dev->dev_attrib.block_size; |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 401 | rd_offset = do_div(tmp, PAGE_SIZE); |
| 402 | rd_page = tmp; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 403 | rd_size = cmd->data_length; |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 404 | |
| 405 | table = rd_get_sg_table(dev, rd_page); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 406 | if (!table) |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 407 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 408 | |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 409 | rd_sg = &table->sg_table[rd_page - table->page_start_offset]; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 410 | |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 411 | pr_debug("RD[%u]: %s LBA: %llu, Size: %u Page: %u, Offset: %u\n", |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 412 | dev->rd_dev_id, |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 413 | data_direction == DMA_FROM_DEVICE ? "Read" : "Write", |
| 414 | cmd->t_task_lba, rd_size, rd_page, rd_offset); |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 415 | |
Nicholas Bellinger | 6e61111 | 2014-01-08 12:06:30 +0000 | [diff] [blame] | 416 | if (cmd->prot_type && data_direction == DMA_TO_DEVICE) { |
| 417 | struct rd_dev_sg_table *prot_table; |
| 418 | struct scatterlist *prot_sg; |
| 419 | u32 sectors = cmd->data_length / se_dev->dev_attrib.block_size; |
| 420 | u32 prot_offset, prot_page; |
| 421 | |
| 422 | tmp = cmd->t_task_lba * se_dev->prot_length; |
| 423 | prot_offset = do_div(tmp, PAGE_SIZE); |
| 424 | prot_page = tmp; |
| 425 | |
| 426 | prot_table = rd_get_prot_table(dev, prot_page); |
| 427 | if (!prot_table) |
| 428 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 429 | |
| 430 | prot_sg = &prot_table->sg_table[prot_page - prot_table->page_start_offset]; |
| 431 | |
| 432 | rc = sbc_dif_verify_write(cmd, cmd->t_task_lba, sectors, 0, |
| 433 | prot_sg, prot_offset); |
| 434 | if (rc) |
| 435 | return rc; |
| 436 | } |
| 437 | |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 438 | src_len = PAGE_SIZE - rd_offset; |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 439 | sg_miter_start(&m, sgl, sgl_nents, |
| 440 | data_direction == DMA_FROM_DEVICE ? |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 441 | SG_MITER_TO_SG : SG_MITER_FROM_SG); |
| 442 | while (rd_size) { |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 443 | u32 len; |
| 444 | void *rd_addr; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 445 | |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 446 | sg_miter_next(&m); |
Hannes Reinecke | bbf344e | 2013-02-06 14:42:28 +0100 | [diff] [blame] | 447 | if (!(u32)m.length) { |
| 448 | pr_debug("RD[%u]: invalid sgl %p len %zu\n", |
| 449 | dev->rd_dev_id, m.addr, m.length); |
| 450 | sg_miter_stop(&m); |
| 451 | return TCM_INCORRECT_AMOUNT_OF_DATA; |
| 452 | } |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 453 | len = min((u32)m.length, src_len); |
Hannes Reinecke | bbf344e | 2013-02-06 14:42:28 +0100 | [diff] [blame] | 454 | if (len > rd_size) { |
| 455 | pr_debug("RD[%u]: size underrun page %d offset %d " |
| 456 | "size %d\n", dev->rd_dev_id, |
| 457 | rd_page, rd_offset, rd_size); |
| 458 | len = rd_size; |
| 459 | } |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 460 | m.consumed = len; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 461 | |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 462 | rd_addr = sg_virt(rd_sg) + rd_offset; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 463 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 464 | if (data_direction == DMA_FROM_DEVICE) |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 465 | memcpy(m.addr, rd_addr, len); |
| 466 | else |
| 467 | memcpy(rd_addr, m.addr, len); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 468 | |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 469 | rd_size -= len; |
| 470 | if (!rd_size) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 471 | continue; |
| 472 | |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 473 | src_len -= len; |
| 474 | if (src_len) { |
| 475 | rd_offset += len; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 476 | continue; |
| 477 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 478 | |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 479 | /* rd page completed, next one please */ |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 480 | rd_page++; |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 481 | rd_offset = 0; |
| 482 | src_len = PAGE_SIZE; |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 483 | if (rd_page <= table->page_end_offset) { |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 484 | rd_sg++; |
| 485 | continue; |
| 486 | } |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 487 | |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 488 | table = rd_get_sg_table(dev, rd_page); |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 489 | if (!table) { |
| 490 | sg_miter_stop(&m); |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 491 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 492 | } |
| 493 | |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 494 | /* since we increment, the first sg entry is correct */ |
| 495 | rd_sg = table->sg_table; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 496 | } |
Sebastian Andrzej Siewior | 65b0c78 | 2011-11-30 10:48:30 +0100 | [diff] [blame] | 497 | sg_miter_stop(&m); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 498 | |
Nicholas Bellinger | 6e61111 | 2014-01-08 12:06:30 +0000 | [diff] [blame] | 499 | if (cmd->prot_type && data_direction == DMA_FROM_DEVICE) { |
| 500 | struct rd_dev_sg_table *prot_table; |
| 501 | struct scatterlist *prot_sg; |
| 502 | u32 sectors = cmd->data_length / se_dev->dev_attrib.block_size; |
| 503 | u32 prot_offset, prot_page; |
| 504 | |
| 505 | tmp = cmd->t_task_lba * se_dev->prot_length; |
| 506 | prot_offset = do_div(tmp, PAGE_SIZE); |
| 507 | prot_page = tmp; |
| 508 | |
| 509 | prot_table = rd_get_prot_table(dev, prot_page); |
| 510 | if (!prot_table) |
| 511 | return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; |
| 512 | |
| 513 | prot_sg = &prot_table->sg_table[prot_page - prot_table->page_start_offset]; |
| 514 | |
| 515 | rc = sbc_dif_verify_read(cmd, cmd->t_task_lba, sectors, 0, |
| 516 | prot_sg, prot_offset); |
| 517 | if (rc) |
| 518 | return rc; |
| 519 | } |
| 520 | |
Christoph Hellwig | 5787cac | 2012-04-24 00:25:06 -0400 | [diff] [blame] | 521 | target_complete_cmd(cmd, SAM_STAT_GOOD); |
Nicholas Bellinger | 03e98c9 | 2011-11-04 02:36:16 -0700 | [diff] [blame] | 522 | return 0; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 523 | } |
| 524 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 525 | enum { |
Nicholas Bellinger | 52c0742 | 2013-05-11 16:16:49 -0700 | [diff] [blame] | 526 | Opt_rd_pages, Opt_rd_nullio, Opt_err |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 527 | }; |
| 528 | |
| 529 | static match_table_t tokens = { |
| 530 | {Opt_rd_pages, "rd_pages=%d"}, |
Nicholas Bellinger | 52c0742 | 2013-05-11 16:16:49 -0700 | [diff] [blame] | 531 | {Opt_rd_nullio, "rd_nullio=%d"}, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 532 | {Opt_err, NULL} |
| 533 | }; |
| 534 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 535 | static ssize_t rd_set_configfs_dev_params(struct se_device *dev, |
| 536 | const char *page, ssize_t count) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 537 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 538 | struct rd_dev *rd_dev = RD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 539 | char *orig, *ptr, *opts; |
| 540 | substring_t args[MAX_OPT_ARGS]; |
| 541 | int ret = 0, arg, token; |
| 542 | |
| 543 | opts = kstrdup(page, GFP_KERNEL); |
| 544 | if (!opts) |
| 545 | return -ENOMEM; |
| 546 | |
| 547 | orig = opts; |
| 548 | |
Sebastian Andrzej Siewior | 90c161b | 2011-11-23 20:53:17 +0100 | [diff] [blame] | 549 | while ((ptr = strsep(&opts, ",\n")) != NULL) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 550 | if (!*ptr) |
| 551 | continue; |
| 552 | |
| 553 | token = match_token(ptr, tokens, args); |
| 554 | switch (token) { |
| 555 | case Opt_rd_pages: |
| 556 | match_int(args, &arg); |
| 557 | rd_dev->rd_page_count = arg; |
Andy Grover | 6708bb2 | 2011-06-08 10:36:43 -0700 | [diff] [blame] | 558 | pr_debug("RAMDISK: Referencing Page" |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 559 | " Count: %u\n", rd_dev->rd_page_count); |
| 560 | rd_dev->rd_flags |= RDF_HAS_PAGE_COUNT; |
| 561 | break; |
Nicholas Bellinger | 52c0742 | 2013-05-11 16:16:49 -0700 | [diff] [blame] | 562 | case Opt_rd_nullio: |
| 563 | match_int(args, &arg); |
| 564 | if (arg != 1) |
| 565 | break; |
| 566 | |
| 567 | pr_debug("RAMDISK: Setting NULLIO flag: %d\n", arg); |
| 568 | rd_dev->rd_flags |= RDF_NULLIO; |
| 569 | break; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 570 | default: |
| 571 | break; |
| 572 | } |
| 573 | } |
| 574 | |
| 575 | kfree(orig); |
| 576 | return (!ret) ? count : ret; |
| 577 | } |
| 578 | |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 579 | static ssize_t rd_show_configfs_dev_params(struct se_device *dev, char *b) |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 580 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 581 | struct rd_dev *rd_dev = RD_DEV(dev); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 582 | |
Christoph Hellwig | 8feb58d | 2012-03-26 04:56:41 -0400 | [diff] [blame] | 583 | ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: rd_mcp\n", |
| 584 | rd_dev->rd_dev_id); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 585 | bl += sprintf(b + bl, " PAGES/PAGE_SIZE: %u*%lu" |
Nicholas Bellinger | 52c0742 | 2013-05-11 16:16:49 -0700 | [diff] [blame] | 586 | " SG_table_count: %u nullio: %d\n", rd_dev->rd_page_count, |
| 587 | PAGE_SIZE, rd_dev->sg_table_count, |
| 588 | !!(rd_dev->rd_flags & RDF_NULLIO)); |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 589 | return bl; |
| 590 | } |
| 591 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 592 | static sector_t rd_get_blocks(struct se_device *dev) |
| 593 | { |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 594 | struct rd_dev *rd_dev = RD_DEV(dev); |
| 595 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 596 | unsigned long long blocks_long = ((rd_dev->rd_page_count * PAGE_SIZE) / |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 597 | dev->dev_attrib.block_size) - 1; |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 598 | |
| 599 | return blocks_long; |
| 600 | } |
| 601 | |
Nicholas Bellinger | d7e8eb5 | 2014-01-07 23:24:14 +0000 | [diff] [blame] | 602 | static int rd_init_prot(struct se_device *dev) |
| 603 | { |
| 604 | struct rd_dev *rd_dev = RD_DEV(dev); |
| 605 | |
| 606 | if (!dev->dev_attrib.pi_prot_type) |
| 607 | return 0; |
| 608 | |
| 609 | return rd_build_prot_space(rd_dev, dev->prot_length); |
| 610 | } |
| 611 | |
| 612 | static void rd_free_prot(struct se_device *dev) |
| 613 | { |
| 614 | struct rd_dev *rd_dev = RD_DEV(dev); |
| 615 | |
| 616 | rd_release_prot_space(rd_dev); |
| 617 | } |
| 618 | |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 619 | static struct sbc_ops rd_sbc_ops = { |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 620 | .execute_rw = rd_execute_rw, |
| 621 | }; |
| 622 | |
Christoph Hellwig | de103c9 | 2012-11-06 12:24:09 -0800 | [diff] [blame] | 623 | static sense_reason_t |
| 624 | rd_parse_cdb(struct se_cmd *cmd) |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 625 | { |
Christoph Hellwig | 9e999a6 | 2012-10-07 10:55:50 -0400 | [diff] [blame] | 626 | return sbc_parse_cdb(cmd, &rd_sbc_ops); |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 627 | } |
| 628 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 629 | static struct se_subsystem_api rd_mcp_template = { |
| 630 | .name = "rd_mcp", |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 631 | .inquiry_prod = "RAMDISK-MCP", |
| 632 | .inquiry_rev = RD_MCP_VERSION, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 633 | .transport_type = TRANSPORT_PLUGIN_VHBA_VDEV, |
| 634 | .attach_hba = rd_attach_hba, |
| 635 | .detach_hba = rd_detach_hba, |
Christoph Hellwig | 0fd97cc | 2012-10-08 00:03:19 -0400 | [diff] [blame] | 636 | .alloc_device = rd_alloc_device, |
| 637 | .configure_device = rd_configure_device, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 638 | .free_device = rd_free_device, |
Christoph Hellwig | 0c2ad7d | 2012-06-17 18:40:52 -0400 | [diff] [blame] | 639 | .parse_cdb = rd_parse_cdb, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 640 | .set_configfs_dev_params = rd_set_configfs_dev_params, |
| 641 | .show_configfs_dev_params = rd_show_configfs_dev_params, |
Christoph Hellwig | 6f23ac8 | 2012-10-07 10:55:53 -0400 | [diff] [blame] | 642 | .get_device_type = sbc_get_device_type, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 643 | .get_blocks = rd_get_blocks, |
Nicholas Bellinger | d7e8eb5 | 2014-01-07 23:24:14 +0000 | [diff] [blame] | 644 | .init_prot = rd_init_prot, |
| 645 | .free_prot = rd_free_prot, |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 646 | }; |
| 647 | |
| 648 | int __init rd_module_init(void) |
| 649 | { |
| 650 | int ret; |
| 651 | |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 652 | ret = transport_subsystem_register(&rd_mcp_template); |
| 653 | if (ret < 0) { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 654 | return ret; |
| 655 | } |
| 656 | |
| 657 | return 0; |
| 658 | } |
| 659 | |
| 660 | void rd_module_exit(void) |
| 661 | { |
Nicholas Bellinger | c66ac9d | 2010-12-17 11:11:26 -0800 | [diff] [blame] | 662 | transport_subsystem_release(&rd_mcp_template); |
| 663 | } |