1 /* 2 * PS3 BD/DVD/CD-ROM Storage Driver 3 * 4 * Copyright (C) 2007 Sony Computer Entertainment Inc. 5 * Copyright 2007 Sony Corp. 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published 9 * by the Free Software Foundation; version 2 of the License. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License along 17 * with this program; if not, write to the Free Software Foundation, Inc., 18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 19 */ 20 21 #include <linux/cdrom.h> 22 #include <linux/highmem.h> 23 #include <linux/module.h> 24 #include <linux/slab.h> 25 26 #include <scsi/scsi.h> 27 #include <scsi/scsi_cmnd.h> 28 #include <scsi/scsi_dbg.h> 29 #include <scsi/scsi_device.h> 30 #include <scsi/scsi_host.h> 31 #include <scsi/scsi_eh.h> 32 33 #include <asm/lv1call.h> 34 #include <asm/ps3stor.h> 35 36 37 #define DEVICE_NAME "ps3rom" 38 39 #define BOUNCE_SIZE (64*1024) 40 41 #define PS3ROM_MAX_SECTORS (BOUNCE_SIZE >> 9) 42 43 44 struct ps3rom_private { 45 struct ps3_storage_device *dev; 46 struct scsi_cmnd *curr_cmd; 47 }; 48 49 50 #define LV1_STORAGE_SEND_ATAPI_COMMAND (1) 51 52 struct lv1_atapi_cmnd_block { 53 u8 pkt[32]; /* packet command block */ 54 u32 pktlen; /* should be 12 for ATAPI 8020 */ 55 u32 blocks; 56 u32 block_size; 57 u32 proto; /* transfer mode */ 58 u32 in_out; /* transfer direction */ 59 u64 buffer; /* parameter except command block */ 60 u32 arglen; /* length above */ 61 }; 62 63 enum lv1_atapi_proto { 64 NON_DATA_PROTO = 0, 65 PIO_DATA_IN_PROTO = 1, 66 PIO_DATA_OUT_PROTO = 2, 67 DMA_PROTO = 3 68 }; 69 70 enum lv1_atapi_in_out { 71 DIR_WRITE = 0, /* memory -> device */ 72 DIR_READ = 1 /* device -> memory */ 73 }; 74 75 76 static int ps3rom_slave_configure(struct scsi_device *scsi_dev) 77 { 78 struct ps3rom_private *priv = shost_priv(scsi_dev->host); 79 struct ps3_storage_device *dev = priv->dev; 80 81 dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %llu, channel %u\n", __func__, 82 __LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel); 83 84 /* 85 * ATAPI SFF8020 devices use MODE_SENSE_10, 86 * so we can prohibit MODE_SENSE_6 87 */ 88 scsi_dev->use_10_for_ms = 1; 89 90 /* we don't support {READ,WRITE}_6 */ 91 scsi_dev->use_10_for_rw = 1; 92 93 return 0; 94 } 95 96 static int ps3rom_atapi_request(struct ps3_storage_device *dev, 97 struct scsi_cmnd *cmd) 98 { 99 struct lv1_atapi_cmnd_block atapi_cmnd; 100 unsigned char opcode = cmd->cmnd[0]; 101 int res; 102 u64 lpar; 103 104 dev_dbg(&dev->sbd.core, "%s:%u: send ATAPI command 0x%02x\n", __func__, 105 __LINE__, opcode); 106 107 memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block)); 108 memcpy(&atapi_cmnd.pkt, cmd->cmnd, 12); 109 atapi_cmnd.pktlen = 12; 110 atapi_cmnd.block_size = 1; /* transfer size is block_size * blocks */ 111 atapi_cmnd.blocks = atapi_cmnd.arglen = scsi_bufflen(cmd); 112 atapi_cmnd.buffer = dev->bounce_lpar; 113 114 switch (cmd->sc_data_direction) { 115 case DMA_FROM_DEVICE: 116 if (scsi_bufflen(cmd) >= CD_FRAMESIZE) 117 atapi_cmnd.proto = DMA_PROTO; 118 else 119 atapi_cmnd.proto = PIO_DATA_IN_PROTO; 120 atapi_cmnd.in_out = DIR_READ; 121 break; 122 123 case DMA_TO_DEVICE: 124 if (scsi_bufflen(cmd) >= CD_FRAMESIZE) 125 atapi_cmnd.proto = DMA_PROTO; 126 else 127 atapi_cmnd.proto = PIO_DATA_OUT_PROTO; 128 atapi_cmnd.in_out = DIR_WRITE; 129 scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size); 130 break; 131 132 default: 133 atapi_cmnd.proto = NON_DATA_PROTO; 134 break; 135 } 136 137 lpar = ps3_mm_phys_to_lpar(__pa(&atapi_cmnd)); 138 res = lv1_storage_send_device_command(dev->sbd.dev_id, 139 LV1_STORAGE_SEND_ATAPI_COMMAND, 140 lpar, sizeof(atapi_cmnd), 141 atapi_cmnd.buffer, 142 atapi_cmnd.arglen, &dev->tag); 143 if (res == LV1_DENIED_BY_POLICY) { 144 dev_dbg(&dev->sbd.core, 145 "%s:%u: ATAPI command 0x%02x denied by policy\n", 146 __func__, __LINE__, opcode); 147 return DID_ERROR << 16; 148 } 149 150 if (res) { 151 dev_err(&dev->sbd.core, 152 "%s:%u: ATAPI command 0x%02x failed %d\n", __func__, 153 __LINE__, opcode, res); 154 return DID_ERROR << 16; 155 } 156 157 return 0; 158 } 159 160 static inline unsigned int srb10_lba(const struct scsi_cmnd *cmd) 161 { 162 return cmd->cmnd[2] << 24 | cmd->cmnd[3] << 16 | cmd->cmnd[4] << 8 | 163 cmd->cmnd[5]; 164 } 165 166 static inline unsigned int srb10_len(const struct scsi_cmnd *cmd) 167 { 168 return cmd->cmnd[7] << 8 | cmd->cmnd[8]; 169 } 170 171 static int ps3rom_read_request(struct ps3_storage_device *dev, 172 struct scsi_cmnd *cmd, u32 start_sector, 173 u32 sectors) 174 { 175 int res; 176 177 dev_dbg(&dev->sbd.core, "%s:%u: read %u sectors starting at %u\n", 178 __func__, __LINE__, sectors, start_sector); 179 180 res = lv1_storage_read(dev->sbd.dev_id, 181 dev->regions[dev->region_idx].id, start_sector, 182 sectors, 0, dev->bounce_lpar, &dev->tag); 183 if (res) { 184 dev_err(&dev->sbd.core, "%s:%u: read failed %d\n", __func__, 185 __LINE__, res); 186 return DID_ERROR << 16; 187 } 188 189 return 0; 190 } 191 192 static int ps3rom_write_request(struct ps3_storage_device *dev, 193 struct scsi_cmnd *cmd, u32 start_sector, 194 u32 sectors) 195 { 196 int res; 197 198 dev_dbg(&dev->sbd.core, "%s:%u: write %u sectors starting at %u\n", 199 __func__, __LINE__, sectors, start_sector); 200 201 scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size); 202 203 res = lv1_storage_write(dev->sbd.dev_id, 204 dev->regions[dev->region_idx].id, start_sector, 205 sectors, 0, dev->bounce_lpar, &dev->tag); 206 if (res) { 207 dev_err(&dev->sbd.core, "%s:%u: write failed %d\n", __func__, 208 __LINE__, res); 209 return DID_ERROR << 16; 210 } 211 212 return 0; 213 } 214 215 static int ps3rom_queuecommand_lck(struct scsi_cmnd *cmd, 216 void (*done)(struct scsi_cmnd *)) 217 { 218 struct ps3rom_private *priv = shost_priv(cmd->device->host); 219 struct ps3_storage_device *dev = priv->dev; 220 unsigned char opcode; 221 int res; 222 223 priv->curr_cmd = cmd; 224 cmd->scsi_done = done; 225 226 opcode = cmd->cmnd[0]; 227 /* 228 * While we can submit READ/WRITE SCSI commands as ATAPI commands, 229 * it's recommended for various reasons (performance, error handling, 230 * ...) to use lv1_storage_{read,write}() instead 231 */ 232 switch (opcode) { 233 case READ_10: 234 res = ps3rom_read_request(dev, cmd, srb10_lba(cmd), 235 srb10_len(cmd)); 236 break; 237 238 case WRITE_10: 239 res = ps3rom_write_request(dev, cmd, srb10_lba(cmd), 240 srb10_len(cmd)); 241 break; 242 243 default: 244 res = ps3rom_atapi_request(dev, cmd); 245 break; 246 } 247 248 if (res) { 249 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 250 cmd->result = res; 251 cmd->sense_buffer[0] = 0x70; 252 cmd->sense_buffer[2] = ILLEGAL_REQUEST; 253 priv->curr_cmd = NULL; 254 cmd->scsi_done(cmd); 255 } 256 257 return 0; 258 } 259 260 static DEF_SCSI_QCMD(ps3rom_queuecommand) 261 262 static int decode_lv1_status(u64 status, unsigned char *sense_key, 263 unsigned char *asc, unsigned char *ascq) 264 { 265 if (((status >> 24) & 0xff) != SAM_STAT_CHECK_CONDITION) 266 return -1; 267 268 *sense_key = (status >> 16) & 0xff; 269 *asc = (status >> 8) & 0xff; 270 *ascq = status & 0xff; 271 return 0; 272 } 273 274 static irqreturn_t ps3rom_interrupt(int irq, void *data) 275 { 276 struct ps3_storage_device *dev = data; 277 struct Scsi_Host *host; 278 struct ps3rom_private *priv; 279 struct scsi_cmnd *cmd; 280 int res; 281 u64 tag, status; 282 unsigned char sense_key, asc, ascq; 283 284 res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status); 285 /* 286 * status = -1 may mean that ATAPI transport completed OK, but 287 * ATAPI command itself resulted CHECK CONDITION 288 * so, upper layer should issue REQUEST_SENSE to check the sense data 289 */ 290 291 if (tag != dev->tag) 292 dev_err(&dev->sbd.core, 293 "%s:%u: tag mismatch, got %llx, expected %llx\n", 294 __func__, __LINE__, tag, dev->tag); 295 296 if (res) { 297 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n", 298 __func__, __LINE__, res, status); 299 return IRQ_HANDLED; 300 } 301 302 host = ps3_system_bus_get_drvdata(&dev->sbd); 303 priv = shost_priv(host); 304 cmd = priv->curr_cmd; 305 306 if (!status) { 307 /* OK, completed */ 308 if (cmd->sc_data_direction == DMA_FROM_DEVICE) { 309 int len; 310 311 len = scsi_sg_copy_from_buffer(cmd, 312 dev->bounce_buf, 313 dev->bounce_size); 314 315 scsi_set_resid(cmd, scsi_bufflen(cmd) - len); 316 } 317 cmd->result = DID_OK << 16; 318 goto done; 319 } 320 321 if (cmd->cmnd[0] == REQUEST_SENSE) { 322 /* SCSI spec says request sense should never get error */ 323 dev_err(&dev->sbd.core, "%s:%u: end error without autosense\n", 324 __func__, __LINE__); 325 cmd->result = DID_ERROR << 16 | SAM_STAT_CHECK_CONDITION; 326 goto done; 327 } 328 329 if (decode_lv1_status(status, &sense_key, &asc, &ascq)) { 330 cmd->result = DID_ERROR << 16; 331 goto done; 332 } 333 334 scsi_build_sense_buffer(0, cmd->sense_buffer, sense_key, asc, ascq); 335 cmd->result = SAM_STAT_CHECK_CONDITION; 336 337 done: 338 priv->curr_cmd = NULL; 339 cmd->scsi_done(cmd); 340 return IRQ_HANDLED; 341 } 342 343 static struct scsi_host_template ps3rom_host_template = { 344 .name = DEVICE_NAME, 345 .slave_configure = ps3rom_slave_configure, 346 .queuecommand = ps3rom_queuecommand, 347 .can_queue = 1, 348 .this_id = 7, 349 .sg_tablesize = SG_ALL, 350 .emulated = 1, /* only sg driver uses this */ 351 .max_sectors = PS3ROM_MAX_SECTORS, 352 .module = THIS_MODULE, 353 }; 354 355 356 static int ps3rom_probe(struct ps3_system_bus_device *_dev) 357 { 358 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); 359 int error; 360 struct Scsi_Host *host; 361 struct ps3rom_private *priv; 362 363 if (dev->blk_size != CD_FRAMESIZE) { 364 dev_err(&dev->sbd.core, 365 "%s:%u: cannot handle block size %llu\n", __func__, 366 __LINE__, dev->blk_size); 367 return -EINVAL; 368 } 369 370 dev->bounce_size = BOUNCE_SIZE; 371 dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA); 372 if (!dev->bounce_buf) 373 return -ENOMEM; 374 375 error = ps3stor_setup(dev, ps3rom_interrupt); 376 if (error) 377 goto fail_free_bounce; 378 379 host = scsi_host_alloc(&ps3rom_host_template, 380 sizeof(struct ps3rom_private)); 381 if (!host) { 382 dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed\n", 383 __func__, __LINE__); 384 error = -ENOMEM; 385 goto fail_teardown; 386 } 387 388 priv = shost_priv(host); 389 ps3_system_bus_set_drvdata(&dev->sbd, host); 390 priv->dev = dev; 391 392 /* One device/LUN per SCSI bus */ 393 host->max_id = 1; 394 host->max_lun = 1; 395 396 error = scsi_add_host(host, &dev->sbd.core); 397 if (error) { 398 dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed %d\n", 399 __func__, __LINE__, error); 400 error = -ENODEV; 401 goto fail_host_put; 402 } 403 404 scsi_scan_host(host); 405 return 0; 406 407 fail_host_put: 408 scsi_host_put(host); 409 ps3_system_bus_set_drvdata(&dev->sbd, NULL); 410 fail_teardown: 411 ps3stor_teardown(dev); 412 fail_free_bounce: 413 kfree(dev->bounce_buf); 414 return error; 415 } 416 417 static int ps3rom_remove(struct ps3_system_bus_device *_dev) 418 { 419 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); 420 struct Scsi_Host *host = ps3_system_bus_get_drvdata(&dev->sbd); 421 422 scsi_remove_host(host); 423 ps3stor_teardown(dev); 424 scsi_host_put(host); 425 ps3_system_bus_set_drvdata(&dev->sbd, NULL); 426 kfree(dev->bounce_buf); 427 return 0; 428 } 429 430 static struct ps3_system_bus_driver ps3rom = { 431 .match_id = PS3_MATCH_ID_STOR_ROM, 432 .core.name = DEVICE_NAME, 433 .core.owner = THIS_MODULE, 434 .probe = ps3rom_probe, 435 .remove = ps3rom_remove 436 }; 437 438 439 static int __init ps3rom_init(void) 440 { 441 return ps3_system_bus_driver_register(&ps3rom); 442 } 443 444 static void __exit ps3rom_exit(void) 445 { 446 ps3_system_bus_driver_unregister(&ps3rom); 447 } 448 449 module_init(ps3rom_init); 450 module_exit(ps3rom_exit); 451 452 MODULE_LICENSE("GPL"); 453 MODULE_DESCRIPTION("PS3 BD/DVD/CD-ROM Storage Driver"); 454 MODULE_AUTHOR("Sony Corporation"); 455 MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_ROM); 456