drivers/scsi/sr_ioctl.c

   1 #include <linux/kernel.h>
   2 #include <linux/sched.h>
   3 #include <linux/mm.h>
   4 #include <linux/fs.h>
   5 #include <linux/errno.h>
   6 #include <linux/string.h>
   7 #include <linux/blkdev.h>
   8 #include <linux/blkpg.h>
   9 #include <linux/cdrom.h>
  10 #include <linux/delay.h>
  11 #include <asm/io.h>
  12 #include <asm/uaccess.h>
  13
  14 #include <scsi/scsi.h>
  15 #include <scsi/scsi_dbg.h>
  16 #include <scsi/scsi_device.h>
  17 #include <scsi/scsi_eh.h>
  18 #include <scsi/scsi_host.h>
  19 #include <scsi/scsi_ioctl.h>
  20 #include <scsi/scsi_cmnd.h>
  21
  22 #include "sr.h"
  23
  24 #if 0
  25 #define DEBUG
  26 #endif
  27
  28 /* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
  29  * It is off by default and can be turned on with this module parameter */
  30 static int xa_test = 0;
  31
  32 module_param(xa_test, int, S_IRUGO | S_IWUSR);
  33
  34 /* primitive to determine whether we need to have GFP_DMA set based on
  35  * the status of the unchecked_isa_dma flag in the host structure */
  36 #define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
  37
  38
  39 static int sr_read_tochdr(struct cdrom_device_info *cdi,
  40                 struct cdrom_tochdr *tochdr)
  41 {
  42         struct scsi_cd *cd = cdi->handle;
  43         struct packet_command cgc;
  44         int result;
  45         unsigned char *buffer;
  46
  47         buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
  48         if (!buffer)
  49                 return -ENOMEM;
  50
  51         memset(&cgc, 0, sizeof(struct packet_command));
  52         cgc.timeout = IOCTL_TIMEOUT;
  53         cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
  54         cgc.cmd[8] = 12;                /* LSB of length */
  55         cgc.buffer = buffer;
  56         cgc.buflen = 12;
  57         cgc.quiet = 1;
  58         cgc.data_direction = DMA_FROM_DEVICE;
  59
  60         result = sr_do_ioctl(cd, &cgc);
  61
  62         tochdr->cdth_trk0 = buffer[2];
  63         tochdr->cdth_trk1 = buffer[3];
  64
  65         kfree(buffer);
  66         return result;
  67 }
  68
  69 static int sr_read_tocentry(struct cdrom_device_info *cdi,
  70                 struct cdrom_tocentry *tocentry)
  71 {
  72         struct scsi_cd *cd = cdi->handle;
  73         struct packet_command cgc;
  74         int result;
  75         unsigned char *buffer;
  76
  77         buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
  78         if (!buffer)
  79                 return -ENOMEM;
  80
  81         memset(&cgc, 0, sizeof(struct packet_command));
  82         cgc.timeout = IOCTL_TIMEOUT;
  83         cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
  84         cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
  85         cgc.cmd[6] = tocentry->cdte_track;
  86         cgc.cmd[8] = 12;                /* LSB of length */
  87         cgc.buffer = buffer;
  88         cgc.buflen = 12;
  89         cgc.data_direction = DMA_FROM_DEVICE;
  90
  91         result = sr_do_ioctl(cd, &cgc);
  92
  93         tocentry->cdte_ctrl = buffer[5] & 0xf;
  94         tocentry->cdte_adr = buffer[5] >> 4;
  95         tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
  96         if (tocentry->cdte_format == CDROM_MSF) {
  97                 tocentry->cdte_addr.msf.minute = buffer[9];
  98                 tocentry->cdte_addr.msf.second = buffer[10];
  99                 tocentry->cdte_addr.msf.frame = buffer[11];
 100         } else
 101                 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
 102                         + buffer[10]) << 8) + buffer[11];
 103
 104         kfree(buffer);
 105         return result;
 106 }
 107
 108 #define IOCTL_RETRIES 3
 109
 110 /* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command.  When these drives
 111    are emulating a SCSI device via the idescsi module, they need to have
 112    CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
 113
 114 static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
 115 {
 116         struct cdrom_tocentry trk0_te, trk1_te;
 117         struct cdrom_tochdr tochdr;
 118         struct packet_command cgc;
 119         int ntracks, ret;
 120
 121         ret = sr_read_tochdr(cdi, &tochdr);
 122         if (ret)
 123                 return ret;
 124
 125         ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
 126
 127         if (ti->cdti_trk1 == ntracks)
 128                 ti->cdti_trk1 = CDROM_LEADOUT;
 129         else if (ti->cdti_trk1 != CDROM_LEADOUT)
 130                 ti->cdti_trk1 ++;
 131
 132         trk0_te.cdte_track = ti->cdti_trk0;
 133         trk0_te.cdte_format = CDROM_MSF;
 134         trk1_te.cdte_track = ti->cdti_trk1;
 135         trk1_te.cdte_format = CDROM_MSF;
 136
 137         ret = sr_read_tocentry(cdi, &trk0_te);
 138         if (ret)
 139                 return ret;
 140         ret = sr_read_tocentry(cdi, &trk1_te);
 141         if (ret)
 142                 return ret;
 143
 144         memset(&cgc, 0, sizeof(struct packet_command));
 145         cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
 146         cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
 147         cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
 148         cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
 149         cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
 150         cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
 151         cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
 152         cgc.data_direction = DMA_NONE;
 153         cgc.timeout = IOCTL_TIMEOUT;
 154         return sr_do_ioctl(cdi->handle, &cgc);
 155 }
 156
 157 static int sr_play_trkind(struct cdrom_device_info *cdi,
 158                 struct cdrom_ti *ti)
 159
 160 {
 161         struct scsi_cd *cd = cdi->handle;
 162         struct packet_command cgc;
 163         int result;
 164
 165         memset(&cgc, 0, sizeof(struct packet_command));
 166         cgc.timeout = IOCTL_TIMEOUT;
 167         cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
 168         cgc.cmd[4] = ti->cdti_trk0;
 169         cgc.cmd[5] = ti->cdti_ind0;
 170         cgc.cmd[7] = ti->cdti_trk1;
 171         cgc.cmd[8] = ti->cdti_ind1;
 172         cgc.data_direction = DMA_NONE;
 173
 174         result = sr_do_ioctl(cd, &cgc);
 175         if (result == -EDRIVE_CANT_DO_THIS)
 176                 result = sr_fake_playtrkind(cdi, ti);
 177
 178         return result;
 179 }
 180
 181 /* We do our own retries because we want to know what the specific
 182    error code is.  Normally the UNIT_ATTENTION code will automatically
 183    clear after one error */
 184
 185 int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
 186 {
 187         struct scsi_device *SDev;
 188         struct scsi_sense_hdr sshdr;
 189         int result, err = 0, retries = 0;
 190         struct request_sense *sense = cgc->sense;
 191
 192         SDev = cd->device;
 193
 194         if (!sense) {
 195                 sense = kmalloc(sizeof(*sense), GFP_KERNEL);
 196                 if (!sense) {
 197                         err = -ENOMEM;
 198                         goto out;
 199                 }
 200         }
 201
 202       retry:
 203         if (!scsi_block_when_processing_errors(SDev)) {
 204                 err = -ENODEV;
 205                 goto out;
 206         }
 207
 208         memset(sense, 0, sizeof(*sense));
 209         result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
 210                               cgc->buffer, cgc->buflen, (char *)sense,
 211                               cgc->timeout, IOCTL_RETRIES, 0);
 212
 213         scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr);
 214
 215         /* Minimal error checking.  Ignore cases we know about, and report the rest. */
 216         if (driver_byte(result) != 0) {
 217                 switch (sshdr.sense_key) {
 218                 case UNIT_ATTENTION:
 219                         SDev->changed = 1;
 220                         if (!cgc->quiet)
 221                                 printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
 222                         if (retries++ < 10)
 223                                 goto retry;
 224                         err = -ENOMEDIUM;
 225                         break;
 226                 case NOT_READY: /* This happens if there is no disc in drive */
 227                         if (sshdr.asc == 0x04 &&
 228                             sshdr.ascq == 0x01) {
 229                                 /* sense: Logical unit is in process of becoming ready */
 230                                 if (!cgc->quiet)
 231                                         printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
 232                                 if (retries++ < 10) {
 233                                         /* sleep 2 sec and try again */
 234                                         ssleep(2);
 235                                         goto retry;
 236                                 } else {
 237                                         /* 20 secs are enough? */
 238                                         err = -ENOMEDIUM;
 239                                         break;
 240                                 }
 241                         }
 242                         if (!cgc->quiet)
 243                                 printk(KERN_INFO "%s: CDROM not ready.  Make sure there is a disc in the drive.\n", cd->cdi.name);
 244 #ifdef DEBUG
 245                         scsi_print_sense_hdr("sr", &sshdr);
 246 #endif
 247                         err = -ENOMEDIUM;
 248                         break;
 249                 case ILLEGAL_REQUEST:
 250                         err = -EIO;
 251                         if (sshdr.asc == 0x20 &&
 252                             sshdr.ascq == 0x00)
 253                                 /* sense: Invalid command operation code */
 254                                 err = -EDRIVE_CANT_DO_THIS;
 255 #ifdef DEBUG
 256                         __scsi_print_command(cgc->cmd);
 257                         scsi_print_sense_hdr("sr", &sshdr);
 258 #endif
 259                         break;
 260                 default:
 261                         printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
 262                         __scsi_print_command(cgc->cmd);
 263                         scsi_print_sense_hdr("sr", &sshdr);
 264                         err = -EIO;
 265                 }
 266         }
 267
 268         /* Wake up a process waiting for device */
 269       out:
 270         if (!cgc->sense)
 271                 kfree(sense);
 272         cgc->stat = err;
 273         return err;
 274 }
 275
 276 /* ---------------------------------------------------------------------- */
 277 /* interface to cdrom.c                                                   */
 278
 279 static int test_unit_ready(Scsi_CD *cd)
 280 {
 281         struct packet_command cgc;
 282
 283         memset(&cgc, 0, sizeof(struct packet_command));
 284         cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
 285         cgc.quiet = 1;
 286         cgc.data_direction = DMA_NONE;
 287         cgc.timeout = IOCTL_TIMEOUT;
 288         return sr_do_ioctl(cd, &cgc);
 289 }
 290
 291 int sr_tray_move(struct cdrom_device_info *cdi, int pos)
 292 {
 293         Scsi_CD *cd = cdi->handle;
 294         struct packet_command cgc;
 295
 296         memset(&cgc, 0, sizeof(struct packet_command));
 297         cgc.cmd[0] = GPCMD_START_STOP_UNIT;
 298         cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
 299         cgc.data_direction = DMA_NONE;
 300         cgc.timeout = IOCTL_TIMEOUT;
 301         return sr_do_ioctl(cd, &cgc);
 302 }
 303
 304 int sr_lock_door(struct cdrom_device_info *cdi, int lock)
 305 {
 306         Scsi_CD *cd = cdi->handle;
 307
 308         return scsi_set_medium_removal(cd->device, lock ?
 309                        SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
 310 }
 311
 312 int sr_drive_status(struct cdrom_device_info *cdi, int slot)
 313 {
 314         if (CDSL_CURRENT != slot) {
 315                 /* we have no changer support */
 316                 return -EINVAL;
 317         }
 318         if (0 == test_unit_ready(cdi->handle))
 319                 return CDS_DISC_OK;
 320
 321         return CDS_TRAY_OPEN;
 322 }
 323
 324 int sr_disk_status(struct cdrom_device_info *cdi)
 325 {
 326         Scsi_CD *cd = cdi->handle;
 327         struct cdrom_tochdr toc_h;
 328         struct cdrom_tocentry toc_e;
 329         int i, rc, have_datatracks = 0;
 330
 331         /* look for data tracks */
 332         rc = sr_read_tochdr(cdi, &toc_h);
 333         if (rc)
 334                 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
 335
 336         for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
 337                 toc_e.cdte_track = i;
 338                 toc_e.cdte_format = CDROM_LBA;
 339                 if (sr_read_tocentry(cdi, &toc_e))
 340                         return CDS_NO_INFO;
 341                 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
 342                         have_datatracks = 1;
 343                         break;
 344                 }
 345         }
 346         if (!have_datatracks)
 347                 return CDS_AUDIO;
 348
 349         if (cd->xa_flag)
 350                 return CDS_XA_2_1;
 351         else
 352                 return CDS_DATA_1;
 353 }
 354
 355 int sr_get_last_session(struct cdrom_device_info *cdi,
 356                         struct cdrom_multisession *ms_info)
 357 {
 358         Scsi_CD *cd = cdi->handle;
 359
 360         ms_info->addr.lba = cd->ms_offset;
 361         ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
 362
 363         return 0;
 364 }
 365
 366 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
 367 {
 368         Scsi_CD *cd = cdi->handle;
 369         struct packet_command cgc;
 370         char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
 371         int result;
 372
 373         if (!buffer)
 374                 return -ENOMEM;
 375
 376         memset(&cgc, 0, sizeof(struct packet_command));
 377         cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
 378         cgc.cmd[2] = 0x40;      /* I do want the subchannel info */
 379         cgc.cmd[3] = 0x02;      /* Give me medium catalog number info */
 380         cgc.cmd[8] = 24;
 381         cgc.buffer = buffer;
 382         cgc.buflen = 24;
 383         cgc.data_direction = DMA_FROM_DEVICE;
 384         cgc.timeout = IOCTL_TIMEOUT;
 385         result = sr_do_ioctl(cd, &cgc);
 386
 387         memcpy(mcn->medium_catalog_number, buffer + 9, 13);
 388         mcn->medium_catalog_number[13] = 0;
 389
 390         kfree(buffer);
 391         return result;
 392 }
 393
 394 int sr_reset(struct cdrom_device_info *cdi)
 395 {
 396         return 0;
 397 }
 398
 399 int sr_select_speed(struct cdrom_device_info *cdi, int speed)
 400 {
 401         Scsi_CD *cd = cdi->handle;
 402         struct packet_command cgc;
 403
 404         if (speed == 0)
 405                 speed = 0xffff; /* set to max */
 406         else
 407                 speed *= 177;   /* Nx to kbyte/s */
 408
 409         memset(&cgc, 0, sizeof(struct packet_command));
 410         cgc.cmd[0] = GPCMD_SET_SPEED;   /* SET CD SPEED */
 411         cgc.cmd[2] = (speed >> 8) & 0xff;       /* MSB for speed (in kbytes/sec) */
 412         cgc.cmd[3] = speed & 0xff;      /* LSB */
 413         cgc.data_direction = DMA_NONE;
 414         cgc.timeout = IOCTL_TIMEOUT;
 415
 416         if (sr_do_ioctl(cd, &cgc))
 417                 return -EIO;
 418         return 0;
 419 }
 420
 421 /* ----------------------------------------------------------------------- */
 422 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer,  */
 423 /* because the generic cdrom driver does the user access stuff for us.     */
 424 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the  */
 425 /* sr_disk_status interface for the generic cdrom driver.                  */
 426
 427 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
 428 {
 429         switch (cmd) {
 430         case CDROMREADTOCHDR:
 431                 return sr_read_tochdr(cdi, arg);
 432         case CDROMREADTOCENTRY:
 433                 return sr_read_tocentry(cdi, arg);
 434         case CDROMPLAYTRKIND:
 435                 return sr_play_trkind(cdi, arg);
 436         default:
 437                 return -EINVAL;
 438         }
 439 }
 440
 441 /* -----------------------------------------------------------------------
 442  * a function to read all sorts of funny cdrom sectors using the READ_CD
 443  * scsi-3 mmc command
 444  *
 445  * lba:     linear block address
 446  * format:  0 = data (anything)
 447  *          1 = audio
 448  *          2 = data (mode 1)
 449  *          3 = data (mode 2)
 450  *          4 = data (mode 2 form1)
 451  *          5 = data (mode 2 form2)
 452  * blksize: 2048 | 2336 | 2340 | 2352
 453  */
 454
 455 static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
 456 {
 457         struct packet_command cgc;
 458
 459 #ifdef DEBUG
 460         printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
 461                cd->cdi.name, lba, format, blksize);
 462 #endif
 463
 464         memset(&cgc, 0, sizeof(struct packet_command));
 465         cgc.cmd[0] = GPCMD_READ_CD;     /* READ_CD */
 466         cgc.cmd[1] = ((format & 7) << 2);
 467         cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
 468         cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
 469         cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
 470         cgc.cmd[5] = (unsigned char) lba & 0xff;
 471         cgc.cmd[8] = 1;
 472         switch (blksize) {
 473         case 2336:
 474                 cgc.cmd[9] = 0x58;
 475                 break;
 476         case 2340:
 477                 cgc.cmd[9] = 0x78;
 478                 break;
 479         case 2352:
 480                 cgc.cmd[9] = 0xf8;
 481                 break;
 482         default:
 483                 cgc.cmd[9] = 0x10;
 484                 break;
 485         }
 486         cgc.buffer = dest;
 487         cgc.buflen = blksize;
 488         cgc.data_direction = DMA_FROM_DEVICE;
 489         cgc.timeout = IOCTL_TIMEOUT;
 490         return sr_do_ioctl(cd, &cgc);
 491 }
 492
 493 /*
 494  * read sectors with blocksizes other than 2048
 495  */
 496
 497 static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
 498 {
 499         struct packet_command cgc;
 500         int rc;
 501
 502         /* we try the READ CD command first... */
 503         if (cd->readcd_known) {
 504                 rc = sr_read_cd(cd, dest, lba, 0, blksize);
 505                 if (-EDRIVE_CANT_DO_THIS != rc)
 506                         return rc;
 507                 cd->readcd_known = 0;
 508                 printk("CDROM does'nt support READ CD (0xbe) command\n");
 509                 /* fall & retry the other way */
 510         }
 511         /* ... if this fails, we switch the blocksize using MODE SELECT */
 512         if (blksize != cd->device->sector_size) {
 513                 if (0 != (rc = sr_set_blocklength(cd, blksize)))
 514                         return rc;
 515         }
 516 #ifdef DEBUG
 517         printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
 518 #endif
 519
 520         memset(&cgc, 0, sizeof(struct packet_command));
 521         cgc.cmd[0] = GPCMD_READ_10;
 522         cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
 523         cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
 524         cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
 525         cgc.cmd[5] = (unsigned char) lba & 0xff;
 526         cgc.cmd[8] = 1;
 527         cgc.buffer = dest;
 528         cgc.buflen = blksize;
 529         cgc.data_direction = DMA_FROM_DEVICE;
 530         cgc.timeout = IOCTL_TIMEOUT;
 531         rc = sr_do_ioctl(cd, &cgc);
 532
 533         return rc;
 534 }
 535
 536 /*
 537  * read a sector in raw mode to check the sector format
 538  * ret: 1 == mode2 (XA), 0 == mode1, <0 == error
 539  */
 540
 541 int sr_is_xa(Scsi_CD *cd)
 542 {
 543         unsigned char *raw_sector;
 544         int is_xa;
 545
 546         if (!xa_test)
 547                 return 0;
 548
 549         raw_sector = (unsigned char *) kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
 550         if (!raw_sector)
 551                 return -ENOMEM;
 552         if (0 == sr_read_sector(cd, cd->ms_offset + 16,
 553                                 CD_FRAMESIZE_RAW1, raw_sector)) {
 554                 is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
 555         } else {
 556                 /* read a raw sector failed for some reason. */
 557                 is_xa = -1;
 558         }
 559         kfree(raw_sector);
 560 #ifdef DEBUG
 561         printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
 562 #endif
 563         return is_xa;
 564 }
 565
 566 int sr_dev_ioctl(struct cdrom_device_info *cdi,
 567                  unsigned int cmd, unsigned long arg)
 568 {
 569         Scsi_CD *cd = cdi->handle;
 570         int ret;
 571
 572         ret = scsi_nonblockable_ioctl(cd->device, cmd,
 573                                       (void __user *)arg, NULL);
 574         /*
 575          * ENODEV means that we didn't recognise the ioctl, or that we
 576          * cannot execute it in the current device state.  In either
 577          * case fall through to scsi_ioctl, which will return ENDOEV again
 578          * if it doesn't recognise the ioctl
 579          */
 580         if (ret != -ENODEV)
 581                 return ret;
 582         return scsi_ioctl(cd->device, cmd, (void __user *)arg);
 583 }