drivers/scsi/ps3rom.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * PS3 BD/DVD/CD-ROM Storage Driver
   4  *
   5  * Copyright (C) 2007 Sony Computer Entertainment Inc.
   6  * Copyright 2007 Sony Corp.
   7  */
   8
   9 #include <linux/cdrom.h>
  10 #include <linux/highmem.h>
  11 #include <linux/module.h>
  12 #include <linux/slab.h>
  13
  14 #include <scsi/scsi.h>
  15 #include <scsi/scsi_cmnd.h>
  16 #include <scsi/scsi_dbg.h>
  17 #include <scsi/scsi_device.h>
  18 #include <scsi/scsi_host.h>
  19 #include <scsi/scsi_eh.h>
  20
  21 #include <asm/lv1call.h>
  22 #include <asm/ps3stor.h>
  23
  24
  25 #define DEVICE_NAME                     "ps3rom"
  26
  27 #define BOUNCE_SIZE                     (64*1024)
  28
  29 #define PS3ROM_MAX_SECTORS              (BOUNCE_SIZE >> 9)
  30
  31
  32 struct ps3rom_private {
  33         struct ps3_storage_device *dev;
  34         struct scsi_cmnd *curr_cmd;
  35 };
  36
  37
  38 #define LV1_STORAGE_SEND_ATAPI_COMMAND  (1)
  39
  40 struct lv1_atapi_cmnd_block {
  41         u8      pkt[32];        /* packet command block           */
  42         u32     pktlen;         /* should be 12 for ATAPI 8020    */
  43         u32     blocks;
  44         u32     block_size;
  45         u32     proto;          /* transfer mode                  */
  46         u32     in_out;         /* transfer direction             */
  47         u64     buffer;         /* parameter except command block */
  48         u32     arglen;         /* length above                   */
  49 };
  50
  51 enum lv1_atapi_proto {
  52         NON_DATA_PROTO     = 0,
  53         PIO_DATA_IN_PROTO  = 1,
  54         PIO_DATA_OUT_PROTO = 2,
  55         DMA_PROTO = 3
  56 };
  57
  58 enum lv1_atapi_in_out {
  59         DIR_WRITE = 0,          /* memory -> device */
  60         DIR_READ = 1            /* device -> memory */
  61 };
  62
  63
  64 static int ps3rom_slave_configure(struct scsi_device *scsi_dev)
  65 {
  66         struct ps3rom_private *priv = shost_priv(scsi_dev->host);
  67         struct ps3_storage_device *dev = priv->dev;
  68
  69         dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %llu, channel %u\n", __func__,
  70                 __LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel);
  71
  72         /*
  73          * ATAPI SFF8020 devices use MODE_SENSE_10,
  74          * so we can prohibit MODE_SENSE_6
  75          */
  76         scsi_dev->use_10_for_ms = 1;
  77
  78         /* we don't support {READ,WRITE}_6 */
  79         scsi_dev->use_10_for_rw = 1;
  80
  81         return 0;
  82 }
  83
  84 static int ps3rom_atapi_request(struct ps3_storage_device *dev,
  85                                 struct scsi_cmnd *cmd)
  86 {
  87         struct lv1_atapi_cmnd_block atapi_cmnd;
  88         unsigned char opcode = cmd->cmnd[0];
  89         int res;
  90         u64 lpar;
  91
  92         dev_dbg(&dev->sbd.core, "%s:%u: send ATAPI command 0x%02x\n", __func__,
  93                 __LINE__, opcode);
  94
  95         memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block));
  96         memcpy(&atapi_cmnd.pkt, cmd->cmnd, 12);
  97         atapi_cmnd.pktlen = 12;
  98         atapi_cmnd.block_size = 1; /* transfer size is block_size * blocks */
  99         atapi_cmnd.blocks = atapi_cmnd.arglen = scsi_bufflen(cmd);
 100         atapi_cmnd.buffer = dev->bounce_lpar;
 101
 102         switch (cmd->sc_data_direction) {
 103         case DMA_FROM_DEVICE:
 104                 if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
 105                         atapi_cmnd.proto = DMA_PROTO;
 106                 else
 107                         atapi_cmnd.proto = PIO_DATA_IN_PROTO;
 108                 atapi_cmnd.in_out = DIR_READ;
 109                 break;
 110
 111         case DMA_TO_DEVICE:
 112                 if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
 113                         atapi_cmnd.proto = DMA_PROTO;
 114                 else
 115                         atapi_cmnd.proto = PIO_DATA_OUT_PROTO;
 116                 atapi_cmnd.in_out = DIR_WRITE;
 117                 scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);
 118                 break;
 119
 120         default:
 121                 atapi_cmnd.proto = NON_DATA_PROTO;
 122                 break;
 123         }
 124
 125         lpar = ps3_mm_phys_to_lpar(__pa(&atapi_cmnd));
 126         res = lv1_storage_send_device_command(dev->sbd.dev_id,
 127                                               LV1_STORAGE_SEND_ATAPI_COMMAND,
 128                                               lpar, sizeof(atapi_cmnd),
 129                                               atapi_cmnd.buffer,
 130                                               atapi_cmnd.arglen, &dev->tag);
 131         if (res == LV1_DENIED_BY_POLICY) {
 132                 dev_dbg(&dev->sbd.core,
 133                         "%s:%u: ATAPI command 0x%02x denied by policy\n",
 134                         __func__, __LINE__, opcode);
 135                 return DID_ERROR << 16;
 136         }
 137
 138         if (res) {
 139                 dev_err(&dev->sbd.core,
 140                         "%s:%u: ATAPI command 0x%02x failed %d\n", __func__,
 141                         __LINE__, opcode, res);
 142                 return DID_ERROR << 16;
 143         }
 144
 145         return 0;
 146 }
 147
 148 static inline unsigned int srb10_lba(const struct scsi_cmnd *cmd)
 149 {
 150         return cmd->cmnd[2] << 24 | cmd->cmnd[3] << 16 | cmd->cmnd[4] << 8 |
 151                cmd->cmnd[5];
 152 }
 153
 154 static inline unsigned int srb10_len(const struct scsi_cmnd *cmd)
 155 {
 156         return cmd->cmnd[7] << 8 | cmd->cmnd[8];
 157 }
 158
 159 static int ps3rom_read_request(struct ps3_storage_device *dev,
 160                                struct scsi_cmnd *cmd, u32 start_sector,
 161                                u32 sectors)
 162 {
 163         int res;
 164
 165         dev_dbg(&dev->sbd.core, "%s:%u: read %u sectors starting at %u\n",
 166                 __func__, __LINE__, sectors, start_sector);
 167
 168         res = lv1_storage_read(dev->sbd.dev_id,
 169                                dev->regions[dev->region_idx].id, start_sector,
 170                                sectors, 0, dev->bounce_lpar, &dev->tag);
 171         if (res) {
 172                 dev_err(&dev->sbd.core, "%s:%u: read failed %d\n", __func__,
 173                         __LINE__, res);
 174                 return DID_ERROR << 16;
 175         }
 176
 177         return 0;
 178 }
 179
 180 static int ps3rom_write_request(struct ps3_storage_device *dev,
 181                                 struct scsi_cmnd *cmd, u32 start_sector,
 182                                 u32 sectors)
 183 {
 184         int res;
 185
 186         dev_dbg(&dev->sbd.core, "%s:%u: write %u sectors starting at %u\n",
 187                 __func__, __LINE__, sectors, start_sector);
 188
 189         scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);
 190
 191         res = lv1_storage_write(dev->sbd.dev_id,
 192                                 dev->regions[dev->region_idx].id, start_sector,
 193                                 sectors, 0, dev->bounce_lpar, &dev->tag);
 194         if (res) {
 195                 dev_err(&dev->sbd.core, "%s:%u: write failed %d\n", __func__,
 196                         __LINE__, res);
 197                 return DID_ERROR << 16;
 198         }
 199
 200         return 0;
 201 }
 202
 203 static int ps3rom_queuecommand_lck(struct scsi_cmnd *cmd,
 204                                void (*done)(struct scsi_cmnd *))
 205 {
 206         struct ps3rom_private *priv = shost_priv(cmd->device->host);
 207         struct ps3_storage_device *dev = priv->dev;
 208         unsigned char opcode;
 209         int res;
 210
 211         priv->curr_cmd = cmd;
 212         cmd->scsi_done = done;
 213
 214         opcode = cmd->cmnd[0];
 215         /*
 216          * While we can submit READ/WRITE SCSI commands as ATAPI commands,
 217          * it's recommended for various reasons (performance, error handling,
 218          * ...) to use lv1_storage_{read,write}() instead
 219          */
 220         switch (opcode) {
 221         case READ_10:
 222                 res = ps3rom_read_request(dev, cmd, srb10_lba(cmd),
 223                                           srb10_len(cmd));
 224                 break;
 225
 226         case WRITE_10:
 227                 res = ps3rom_write_request(dev, cmd, srb10_lba(cmd),
 228                                            srb10_len(cmd));
 229                 break;
 230
 231         default:
 232                 res = ps3rom_atapi_request(dev, cmd);
 233                 break;
 234         }
 235
 236         if (res) {
 237                 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
 238                 cmd->result = res;
 239                 cmd->sense_buffer[0] = 0x70;
 240                 cmd->sense_buffer[2] = ILLEGAL_REQUEST;
 241                 priv->curr_cmd = NULL;
 242                 cmd->scsi_done(cmd);
 243         }
 244
 245         return 0;
 246 }
 247
 248 static DEF_SCSI_QCMD(ps3rom_queuecommand)
 249
 250 static int decode_lv1_status(u64 status, unsigned char *sense_key,
 251                              unsigned char *asc, unsigned char *ascq)
 252 {
 253         if (((status >> 24) & 0xff) != SAM_STAT_CHECK_CONDITION)
 254                 return -1;
 255
 256         *sense_key = (status >> 16) & 0xff;
 257         *asc       = (status >>  8) & 0xff;
 258         *ascq      =  status        & 0xff;
 259         return 0;
 260 }
 261
 262 static irqreturn_t ps3rom_interrupt(int irq, void *data)
 263 {
 264         struct ps3_storage_device *dev = data;
 265         struct Scsi_Host *host;
 266         struct ps3rom_private *priv;
 267         struct scsi_cmnd *cmd;
 268         int res;
 269         u64 tag, status;
 270         unsigned char sense_key, asc, ascq;
 271
 272         res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
 273         /*
 274          * status = -1 may mean that ATAPI transport completed OK, but
 275          * ATAPI command itself resulted CHECK CONDITION
 276          * so, upper layer should issue REQUEST_SENSE to check the sense data
 277          */
 278
 279         if (tag != dev->tag)
 280                 dev_err(&dev->sbd.core,
 281                         "%s:%u: tag mismatch, got %llx, expected %llx\n",
 282                         __func__, __LINE__, tag, dev->tag);
 283
 284         if (res) {
 285                 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
 286                         __func__, __LINE__, res, status);
 287                 return IRQ_HANDLED;
 288         }
 289
 290         host = ps3_system_bus_get_drvdata(&dev->sbd);
 291         priv = shost_priv(host);
 292         cmd = priv->curr_cmd;
 293
 294         if (!status) {
 295                 /* OK, completed */
 296                 if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
 297                         int len;
 298
 299                         len = scsi_sg_copy_from_buffer(cmd,
 300                                                        dev->bounce_buf,
 301                                                        dev->bounce_size);
 302
 303                         scsi_set_resid(cmd, scsi_bufflen(cmd) - len);
 304                 }
 305                 cmd->result = DID_OK << 16;
 306                 goto done;
 307         }
 308
 309         if (cmd->cmnd[0] == REQUEST_SENSE) {
 310                 /* SCSI spec says request sense should never get error */
 311                 dev_err(&dev->sbd.core, "%s:%u: end error without autosense\n",
 312                         __func__, __LINE__);
 313                 cmd->result = DID_ERROR << 16 | SAM_STAT_CHECK_CONDITION;
 314                 goto done;
 315         }
 316
 317         if (decode_lv1_status(status, &sense_key, &asc, &ascq)) {
 318                 cmd->result = DID_ERROR << 16;
 319                 goto done;
 320         }
 321
 322         scsi_build_sense_buffer(0, cmd->sense_buffer, sense_key, asc, ascq);
 323         cmd->result = SAM_STAT_CHECK_CONDITION;
 324
 325 done:
 326         priv->curr_cmd = NULL;
 327         cmd->scsi_done(cmd);
 328         return IRQ_HANDLED;
 329 }
 330
 331 static struct scsi_host_template ps3rom_host_template = {
 332         .name =                 DEVICE_NAME,
 333         .slave_configure =      ps3rom_slave_configure,
 334         .queuecommand =         ps3rom_queuecommand,
 335         .can_queue =            1,
 336         .this_id =              7,
 337         .sg_tablesize =         SG_ALL,
 338         .emulated =             1,              /* only sg driver uses this */
 339         .max_sectors =          PS3ROM_MAX_SECTORS,
 340         .module =               THIS_MODULE,
 341 };
 342
 343
 344 static int ps3rom_probe(struct ps3_system_bus_device *_dev)
 345 {
 346         struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
 347         int error;
 348         struct Scsi_Host *host;
 349         struct ps3rom_private *priv;
 350
 351         if (dev->blk_size != CD_FRAMESIZE) {
 352                 dev_err(&dev->sbd.core,
 353                         "%s:%u: cannot handle block size %llu\n", __func__,
 354                         __LINE__, dev->blk_size);
 355                 return -EINVAL;
 356         }
 357
 358         dev->bounce_size = BOUNCE_SIZE;
 359         dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
 360         if (!dev->bounce_buf)
 361                 return -ENOMEM;
 362
 363         error = ps3stor_setup(dev, ps3rom_interrupt);
 364         if (error)
 365                 goto fail_free_bounce;
 366
 367         host = scsi_host_alloc(&ps3rom_host_template,
 368                                sizeof(struct ps3rom_private));
 369         if (!host) {
 370                 dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed\n",
 371                         __func__, __LINE__);
 372                 error = -ENOMEM;
 373                 goto fail_teardown;
 374         }
 375
 376         priv = shost_priv(host);
 377         ps3_system_bus_set_drvdata(&dev->sbd, host);
 378         priv->dev = dev;
 379
 380         /* One device/LUN per SCSI bus */
 381         host->max_id = 1;
 382         host->max_lun = 1;
 383
 384         error = scsi_add_host(host, &dev->sbd.core);
 385         if (error) {
 386                 dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed %d\n",
 387                         __func__, __LINE__, error);
 388                 error = -ENODEV;
 389                 goto fail_host_put;
 390         }
 391
 392         scsi_scan_host(host);
 393         return 0;
 394
 395 fail_host_put:
 396         scsi_host_put(host);
 397         ps3_system_bus_set_drvdata(&dev->sbd, NULL);
 398 fail_teardown:
 399         ps3stor_teardown(dev);
 400 fail_free_bounce:
 401         kfree(dev->bounce_buf);
 402         return error;
 403 }
 404
 405 static int ps3rom_remove(struct ps3_system_bus_device *_dev)
 406 {
 407         struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
 408         struct Scsi_Host *host = ps3_system_bus_get_drvdata(&dev->sbd);
 409
 410         scsi_remove_host(host);
 411         ps3stor_teardown(dev);
 412         scsi_host_put(host);
 413         ps3_system_bus_set_drvdata(&dev->sbd, NULL);
 414         kfree(dev->bounce_buf);
 415         return 0;
 416 }
 417
 418 static struct ps3_system_bus_driver ps3rom = {
 419         .match_id       = PS3_MATCH_ID_STOR_ROM,
 420         .core.name      = DEVICE_NAME,
 421         .core.owner     = THIS_MODULE,
 422         .probe          = ps3rom_probe,
 423         .remove         = ps3rom_remove
 424 };
 425
 426
 427 static int __init ps3rom_init(void)
 428 {
 429         return ps3_system_bus_driver_register(&ps3rom);
 430 }
 431
 432 static void __exit ps3rom_exit(void)
 433 {
 434         ps3_system_bus_driver_unregister(&ps3rom);
 435 }
 436
 437 module_init(ps3rom_init);
 438 module_exit(ps3rom_exit);
 439
 440 MODULE_LICENSE("GPL");
 441 MODULE_DESCRIPTION("PS3 BD/DVD/CD-ROM Storage Driver");
 442 MODULE_AUTHOR("Sony Corporation");
 443 MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_ROM);