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 <asm/uaccess.h>
   6 #include <linux/errno.h>
   7 #include <linux/string.h>
   8
   9 #include <linux/blk.h>
  10 #include <linux/blkpg.h>
  11 #include "scsi.h"
  12 #include "hosts.h"
  13 #include <scsi/scsi_ioctl.h>
  14
  15 #include <linux/cdrom.h>
  16 #include "sr.h"
  17
  18 #if 0
  19 #define DEBUG
  20 #endif
  21
  22 /* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
  23  * It is off by default and can be turned on with this module parameter */
  24 static int xa_test = 0;
  25
  26 extern void get_sectorsize(int);
  27
  28 #define IOCTL_RETRIES 3
  29 /* The CDROM is fairly slow, so we need a little extra time */
  30 /* In fact, it is very slow if it has to spin up first */
  31 #define IOCTL_TIMEOUT 30*HZ
  32
  33 /* We do our own retries because we want to know what the specific
  34    error code is.  Normally the UNIT_ATTENTION code will automatically
  35    clear after one error */
  36
  37 int sr_do_ioctl(int target, unsigned char *sr_cmd, void *buffer, unsigned buflength, int quiet, int readwrite)
  38 {
  39         Scsi_Request *SRpnt;
  40         Scsi_Device *SDev;
  41         struct request *req;
  42         int result, err = 0, retries = 0;
  43         char *bounce_buffer;
  44
  45         SDev = scsi_CDs[target].device;
  46         SRpnt = scsi_allocate_request(scsi_CDs[target].device);
  47         SRpnt->sr_data_direction = readwrite;
  48
  49         /* use ISA DMA buffer if necessary */
  50         SRpnt->sr_request.buffer = buffer;
  51         if (buffer && SRpnt->sr_host->unchecked_isa_dma &&
  52             (virt_to_phys(buffer) + buflength - 1 > ISA_DMA_THRESHOLD)) {
  53                 bounce_buffer = (char *) scsi_malloc((buflength + 511) & ~511);
  54                 if (bounce_buffer == NULL) {
  55                         printk("SCSI DMA pool exhausted.");
  56                         return -ENOMEM;
  57                 }
  58                 memcpy(bounce_buffer, (char *) buffer, buflength);
  59                 buffer = bounce_buffer;
  60         }
  61       retry:
  62         if (!scsi_block_when_processing_errors(SDev))
  63                 return -ENODEV;
  64
  65
  66         scsi_wait_req(SRpnt, (void *) sr_cmd, (void *) buffer, buflength,
  67                       IOCTL_TIMEOUT, IOCTL_RETRIES);
  68
  69         req = &SRpnt->sr_request;
  70         if (SRpnt->sr_buffer && req->buffer && SRpnt->sr_buffer != req->buffer) {
  71                 memcpy(req->buffer, SRpnt->sr_buffer, SRpnt->sr_bufflen);
  72                 scsi_free(SRpnt->sr_buffer, (SRpnt->sr_bufflen + 511) & ~511);
  73                 SRpnt->sr_buffer = req->buffer;
  74         }
  75
  76         result = SRpnt->sr_result;
  77
  78         /* Minimal error checking.  Ignore cases we know about, and report the rest. */
  79         if (driver_byte(result) != 0) {
  80                 switch (SRpnt->sr_sense_buffer[2] & 0xf) {
  81                 case UNIT_ATTENTION:
  82                         scsi_CDs[target].device->changed = 1;
  83                         if (!quiet)
  84                                 printk(KERN_INFO "sr%d: disc change detected.\n", target);
  85                         if (retries++ < 10)
  86                                 goto retry;
  87                         err = -ENOMEDIUM;
  88                         break;
  89                 case NOT_READY: /* This happens if there is no disc in drive */
  90                         if (SRpnt->sr_sense_buffer[12] == 0x04 &&
  91                             SRpnt->sr_sense_buffer[13] == 0x01) {
  92                                 /* sense: Logical unit is in process of becoming ready */
  93                                 if (!quiet)
  94                                         printk(KERN_INFO "sr%d: CDROM not ready yet.\n", target);
  95                                 if (retries++ < 10) {
  96                                         /* sleep 2 sec and try again */
  97                                         scsi_sleep(2 * HZ);
  98                                         goto retry;
  99                                 } else {
 100                                         /* 20 secs are enough? */
 101                                         err = -ENOMEDIUM;
 102                                         break;
 103                                 }
 104                         }
 105                         if (!quiet)
 106                                 printk(KERN_INFO "sr%d: CDROM not ready.  Make sure there is a disc in the drive.\n", target);
 107 #ifdef DEBUG
 108                         print_req_sense("sr", SRpnt);
 109 #endif
 110                         err = -ENOMEDIUM;
 111                         break;
 112                 case ILLEGAL_REQUEST:
 113                         if (!quiet)
 114                                 printk(KERN_ERR "sr%d: CDROM (ioctl) reports ILLEGAL "
 115                                        "REQUEST.\n", target);
 116                         if (SRpnt->sr_sense_buffer[12] == 0x20 &&
 117                             SRpnt->sr_sense_buffer[13] == 0x00) {
 118                                 /* sense: Invalid command operation code */
 119                                 err = -EDRIVE_CANT_DO_THIS;
 120                         } else {
 121                                 err = -EINVAL;
 122                         }
 123 #ifdef DEBUG
 124                         print_command(sr_cmd);
 125                         print_req_sense("sr", SRpnt);
 126 #endif
 127                         break;
 128                 default:
 129                         printk(KERN_ERR "sr%d: CDROM (ioctl) error, command: ", target);
 130                         print_command(sr_cmd);
 131                         print_req_sense("sr", SRpnt);
 132                         err = -EIO;
 133                 }
 134         }
 135         result = SRpnt->sr_result;
 136         /* Wake up a process waiting for device */
 137         scsi_release_request(SRpnt);
 138         SRpnt = NULL;
 139         return err;
 140 }
 141
 142 /* ---------------------------------------------------------------------- */
 143 /* interface to cdrom.c                                                   */
 144
 145 static int test_unit_ready(int minor)
 146 {
 147         u_char sr_cmd[10];
 148
 149         sr_cmd[0] = GPCMD_TEST_UNIT_READY;
 150         sr_cmd[1] = ((scsi_CDs[minor].device->lun) << 5);
 151         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 152         return sr_do_ioctl(minor, sr_cmd, NULL, 0, 1, SCSI_DATA_NONE);
 153 }
 154
 155 int sr_tray_move(struct cdrom_device_info *cdi, int pos)
 156 {
 157         u_char sr_cmd[10];
 158
 159         sr_cmd[0] = GPCMD_START_STOP_UNIT;
 160         sr_cmd[1] = ((scsi_CDs[MINOR(cdi->dev)].device->lun) << 5);
 161         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 162         sr_cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
 163
 164         return sr_do_ioctl(MINOR(cdi->dev), sr_cmd, NULL, 0, 0, SCSI_DATA_NONE);
 165 }
 166
 167 int sr_lock_door(struct cdrom_device_info *cdi, int lock)
 168 {
 169         return scsi_ioctl(scsi_CDs[MINOR(cdi->dev)].device,
 170                       lock ? SCSI_IOCTL_DOORLOCK : SCSI_IOCTL_DOORUNLOCK,
 171                           0);
 172 }
 173
 174 int sr_drive_status(struct cdrom_device_info *cdi, int slot)
 175 {
 176         if (CDSL_CURRENT != slot) {
 177                 /* we have no changer support */
 178                 return -EINVAL;
 179         }
 180         if (0 == test_unit_ready(MINOR(cdi->dev)))
 181                 return CDS_DISC_OK;
 182
 183         return CDS_TRAY_OPEN;
 184 }
 185
 186 int sr_disk_status(struct cdrom_device_info *cdi)
 187 {
 188         struct cdrom_tochdr toc_h;
 189         struct cdrom_tocentry toc_e;
 190         int i, rc, have_datatracks = 0;
 191
 192         /* look for data tracks */
 193         if (0 != (rc = sr_audio_ioctl(cdi, CDROMREADTOCHDR, &toc_h)))
 194                 return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
 195
 196         for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
 197                 toc_e.cdte_track = i;
 198                 toc_e.cdte_format = CDROM_LBA;
 199                 if (sr_audio_ioctl(cdi, CDROMREADTOCENTRY, &toc_e))
 200                         return CDS_NO_INFO;
 201                 if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
 202                         have_datatracks = 1;
 203                         break;
 204                 }
 205         }
 206         if (!have_datatracks)
 207                 return CDS_AUDIO;
 208
 209         if (scsi_CDs[MINOR(cdi->dev)].xa_flag)
 210                 return CDS_XA_2_1;
 211         else
 212                 return CDS_DATA_1;
 213 }
 214
 215 int sr_get_last_session(struct cdrom_device_info *cdi,
 216                         struct cdrom_multisession *ms_info)
 217 {
 218         ms_info->addr.lba = scsi_CDs[MINOR(cdi->dev)].ms_offset;
 219         ms_info->xa_flag = scsi_CDs[MINOR(cdi->dev)].xa_flag ||
 220             (scsi_CDs[MINOR(cdi->dev)].ms_offset > 0);
 221
 222         return 0;
 223 }
 224
 225 int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
 226 {
 227         u_char sr_cmd[10];
 228         char buffer[32];
 229         int result;
 230
 231         sr_cmd[0] = GPCMD_READ_SUBCHANNEL;
 232         sr_cmd[1] = ((scsi_CDs[MINOR(cdi->dev)].device->lun) << 5);
 233         sr_cmd[2] = 0x40;       /* I do want the subchannel info */
 234         sr_cmd[3] = 0x02;       /* Give me medium catalog number info */
 235         sr_cmd[4] = sr_cmd[5] = 0;
 236         sr_cmd[6] = 0;
 237         sr_cmd[7] = 0;
 238         sr_cmd[8] = 24;
 239         sr_cmd[9] = 0;
 240
 241         result = sr_do_ioctl(MINOR(cdi->dev), sr_cmd, buffer, 24, 0, SCSI_DATA_READ);
 242
 243         memcpy(mcn->medium_catalog_number, buffer + 9, 13);
 244         mcn->medium_catalog_number[13] = 0;
 245
 246         return result;
 247 }
 248
 249 int sr_reset(struct cdrom_device_info *cdi)
 250 {
 251         invalidate_buffers(cdi->dev);
 252         return 0;
 253 }
 254
 255 int sr_select_speed(struct cdrom_device_info *cdi, int speed)
 256 {
 257         u_char sr_cmd[MAX_COMMAND_SIZE];
 258
 259         if (speed == 0)
 260                 speed = 0xffff; /* set to max */
 261         else
 262                 speed *= 177;   /* Nx to kbyte/s */
 263
 264         memset(sr_cmd, 0, MAX_COMMAND_SIZE);
 265         sr_cmd[0] = GPCMD_SET_SPEED;    /* SET CD SPEED */
 266         sr_cmd[1] = (scsi_CDs[MINOR(cdi->dev)].device->lun) << 5;
 267         sr_cmd[2] = (speed >> 8) & 0xff;        /* MSB for speed (in kbytes/sec) */
 268         sr_cmd[3] = speed & 0xff;       /* LSB */
 269
 270         if (sr_do_ioctl(MINOR(cdi->dev), sr_cmd, NULL, 0, 0, SCSI_DATA_NONE))
 271                 return -EIO;
 272         return 0;
 273 }
 274
 275 /* ----------------------------------------------------------------------- */
 276 /* this is called by the generic cdrom driver. arg is a _kernel_ pointer,  */
 277 /* becauce the generic cdrom driver does the user access stuff for us.     */
 278 /* only cdromreadtochdr and cdromreadtocentry are left - for use with the  */
 279 /* sr_disk_status interface for the generic cdrom driver.                  */
 280
 281 int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
 282 {
 283         u_char sr_cmd[10];
 284         int result, target = MINOR(cdi->dev);
 285         unsigned char buffer[32];
 286
 287         switch (cmd) {
 288         case CDROMREADTOCHDR:
 289                 {
 290                         struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg;
 291
 292                         sr_cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 293                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5);
 294                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 295                         sr_cmd[6] = 0;
 296                         sr_cmd[7] = 0;  /* MSB of length (12) */
 297                         sr_cmd[8] = 12;         /* LSB of length */
 298                         sr_cmd[9] = 0;
 299
 300                         result = sr_do_ioctl(target, sr_cmd, buffer, 12, 1, SCSI_DATA_READ);
 301
 302                         tochdr->cdth_trk0 = buffer[2];
 303                         tochdr->cdth_trk1 = buffer[3];
 304
 305                         break;
 306                 }
 307
 308         case CDROMREADTOCENTRY:
 309                 {
 310                         struct cdrom_tocentry *tocentry = (struct cdrom_tocentry *) arg;
 311
 312                         sr_cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
 313                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) |
 314                             (tocentry->cdte_format == CDROM_MSF ? 0x02 : 0);
 315                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 316                         sr_cmd[6] = tocentry->cdte_track;
 317                         sr_cmd[7] = 0;  /* MSB of length (12)  */
 318                         sr_cmd[8] = 12;         /* LSB of length */
 319                         sr_cmd[9] = 0;
 320
 321                         result = sr_do_ioctl(target, sr_cmd, buffer, 12, 0, SCSI_DATA_READ);
 322
 323                         tocentry->cdte_ctrl = buffer[5] & 0xf;
 324                         tocentry->cdte_adr = buffer[5] >> 4;
 325                         tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
 326                         if (tocentry->cdte_format == CDROM_MSF) {
 327                                 tocentry->cdte_addr.msf.minute = buffer[9];
 328                                 tocentry->cdte_addr.msf.second = buffer[10];
 329                                 tocentry->cdte_addr.msf.frame = buffer[11];
 330                         } else
 331                                 tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
 332                                         + buffer[10]) << 8) + buffer[11];
 333
 334                         break;
 335                 }
 336
 337         default:
 338                 return -EINVAL;
 339         }
 340
 341 #if 0
 342         if (result)
 343                 printk("DEBUG: sr_audio: result for ioctl %x: %x\n", cmd, result);
 344 #endif
 345
 346         return result;
 347 }
 348
 349 /* -----------------------------------------------------------------------
 350  * a function to read all sorts of funny cdrom sectors using the READ_CD
 351  * scsi-3 mmc command
 352  *
 353  * lba:     linear block address
 354  * format:  0 = data (anything)
 355  *          1 = audio
 356  *          2 = data (mode 1)
 357  *          3 = data (mode 2)
 358  *          4 = data (mode 2 form1)
 359  *          5 = data (mode 2 form2)
 360  * blksize: 2048 | 2336 | 2340 | 2352
 361  */
 362
 363 int sr_read_cd(int minor, unsigned char *dest, int lba, int format, int blksize)
 364 {
 365         unsigned char cmd[MAX_COMMAND_SIZE];
 366
 367 #ifdef DEBUG
 368         printk("sr%d: sr_read_cd lba=%d format=%d blksize=%d\n",
 369                minor, lba, format, blksize);
 370 #endif
 371
 372         memset(cmd, 0, MAX_COMMAND_SIZE);
 373         cmd[0] = GPCMD_READ_CD; /* READ_CD */
 374         cmd[1] = (scsi_CDs[minor].device->lun << 5) | ((format & 7) << 2);
 375         cmd[2] = (unsigned char) (lba >> 24) & 0xff;
 376         cmd[3] = (unsigned char) (lba >> 16) & 0xff;
 377         cmd[4] = (unsigned char) (lba >> 8) & 0xff;
 378         cmd[5] = (unsigned char) lba & 0xff;
 379         cmd[8] = 1;
 380         switch (blksize) {
 381         case 2336:
 382                 cmd[9] = 0x58;
 383                 break;
 384         case 2340:
 385                 cmd[9] = 0x78;
 386                 break;
 387         case 2352:
 388                 cmd[9] = 0xf8;
 389                 break;
 390         default:
 391                 cmd[9] = 0x10;
 392                 break;
 393         }
 394         return sr_do_ioctl(minor, cmd, dest, blksize, 0, SCSI_DATA_READ);
 395 }
 396
 397 /*
 398  * read sectors with blocksizes other than 2048
 399  */
 400
 401 int sr_read_sector(int minor, int lba, int blksize, unsigned char *dest)
 402 {
 403         unsigned char cmd[MAX_COMMAND_SIZE];    /* the scsi-command */
 404         int rc;
 405
 406         /* we try the READ CD command first... */
 407         if (scsi_CDs[minor].readcd_known) {
 408                 rc = sr_read_cd(minor, dest, lba, 0, blksize);
 409                 if (-EDRIVE_CANT_DO_THIS != rc)
 410                         return rc;
 411                 scsi_CDs[minor].readcd_known = 0;
 412                 printk("CDROM does'nt support READ CD (0xbe) command\n");
 413                 /* fall & retry the other way */
 414         }
 415         /* ... if this fails, we switch the blocksize using MODE SELECT */
 416         if (blksize != scsi_CDs[minor].device->sector_size) {
 417                 if (0 != (rc = sr_set_blocklength(minor, blksize)))
 418                         return rc;
 419         }
 420 #ifdef DEBUG
 421         printk("sr%d: sr_read_sector lba=%d blksize=%d\n", minor, lba, blksize);
 422 #endif
 423
 424         memset(cmd, 0, MAX_COMMAND_SIZE);
 425         cmd[0] = GPCMD_READ_10;
 426         cmd[1] = (scsi_CDs[minor].device->lun << 5);
 427         cmd[2] = (unsigned char) (lba >> 24) & 0xff;
 428         cmd[3] = (unsigned char) (lba >> 16) & 0xff;
 429         cmd[4] = (unsigned char) (lba >> 8) & 0xff;
 430         cmd[5] = (unsigned char) lba & 0xff;
 431         cmd[8] = 1;
 432         rc = sr_do_ioctl(minor, cmd, dest, blksize, 0, SCSI_DATA_READ);
 433
 434         return rc;
 435 }
 436
 437 /*
 438  * read a sector in raw mode to check the sector format
 439  * ret: 1 == mode2 (XA), 0 == mode1, <0 == error
 440  */
 441
 442 int sr_is_xa(int minor)
 443 {
 444         unsigned char *raw_sector;
 445         int is_xa;
 446
 447         if (!xa_test)
 448                 return 0;
 449
 450         raw_sector = (unsigned char *) scsi_malloc(2048 + 512);
 451         if (!raw_sector)
 452                 return -ENOMEM;
 453         if (0 == sr_read_sector(minor, scsi_CDs[minor].ms_offset + 16,
 454                                 CD_FRAMESIZE_RAW1, raw_sector)) {
 455                 is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
 456         } else {
 457                 /* read a raw sector failed for some reason. */
 458                 is_xa = -1;
 459         }
 460         scsi_free(raw_sector, 2048 + 512);
 461 #ifdef DEBUG
 462         printk("sr%d: sr_is_xa: %d\n", minor, is_xa);
 463 #endif
 464         return is_xa;
 465 }
 466
 467 int sr_dev_ioctl(struct cdrom_device_info *cdi,
 468                  unsigned int cmd, unsigned long arg)
 469 {
 470         int target;
 471
 472         target = MINOR(cdi->dev);
 473
 474         switch (cmd) {
 475         case BLKROSET:
 476         case BLKROGET:
 477         case BLKRASET:
 478         case BLKRAGET:
 479         case BLKFLSBUF:
 480         case BLKSSZGET:
 481                 return blk_ioctl(cdi->dev, cmd, arg);
 482
 483         default:
 484                 return scsi_ioctl(scsi_CDs[target].device, cmd, (void *) arg);
 485         }
 486 }
 487
 488 /*
 489  * Overrides for Emacs so that we follow Linus's tabbing style.
 490  * Emacs will notice this stuff at the end of the file and automatically
 491  * adjust the settings for this buffer only.  This must remain at the end
 492  * of the file.
 493  * ---------------------------------------------------------------------------
 494  * Local variables:
 495  * c-indent-level: 4
 496  * c-brace-imaginary-offset: 0
 497  * c-brace-offset: -4
 498  * c-argdecl-indent: 4
 499  * c-label-offset: -4
 500  * c-continued-statement-offset: 4
 501  * c-continued-brace-offset: 0
 502  * indent-tabs-mode: nil
 503  * tab-width: 8
 504  * End:
 505  */