linux/drivers/scsi/sr_ioctl.c
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   1#include <linux/kernel.h>
   2#include <linux/mm.h>
   3#include <linux/fs.h>
   4#include <linux/errno.h>
   5#include <linux/string.h>
   6#include <linux/blkdev.h>
   7#include <linux/module.h>
   8#include <linux/blkpg.h>
   9#include <linux/cdrom.h>
  10#include <linux/delay.h>
  11#include <linux/slab.h>
  12#include <asm/io.h>
  13#include <asm/uaccess.h>
  14
  15#include <scsi/scsi.h>
  16#include <scsi/scsi_dbg.h>
  17#include <scsi/scsi_device.h>
  18#include <scsi/scsi_eh.h>
  19#include <scsi/scsi_host.h>
  20#include <scsi/scsi_ioctl.h>
  21#include <scsi/scsi_cmnd.h>
  22
  23#include "sr.h"
  24
  25#if 0
  26#define DEBUG
  27#endif
  28
  29/* The sr_is_xa() seems to trigger firmware bugs with some drives :-(
  30 * It is off by default and can be turned on with this module parameter */
  31static int xa_test = 0;
  32
  33module_param(xa_test, int, S_IRUGO | S_IWUSR);
  34
  35/* primitive to determine whether we need to have GFP_DMA set based on
  36 * the status of the unchecked_isa_dma flag in the host structure */
  37#define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
  38
  39
  40static int sr_read_tochdr(struct cdrom_device_info *cdi,
  41                struct cdrom_tochdr *tochdr)
  42{
  43        struct scsi_cd *cd = cdi->handle;
  44        struct packet_command cgc;
  45        int result;
  46        unsigned char *buffer;
  47
  48        buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
  49        if (!buffer)
  50                return -ENOMEM;
  51
  52        memset(&cgc, 0, sizeof(struct packet_command));
  53        cgc.timeout = IOCTL_TIMEOUT;
  54        cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
  55        cgc.cmd[8] = 12;                /* LSB of length */
  56        cgc.buffer = buffer;
  57        cgc.buflen = 12;
  58        cgc.quiet = 1;
  59        cgc.data_direction = DMA_FROM_DEVICE;
  60
  61        result = sr_do_ioctl(cd, &cgc);
  62
  63        tochdr->cdth_trk0 = buffer[2];
  64        tochdr->cdth_trk1 = buffer[3];
  65
  66        kfree(buffer);
  67        return result;
  68}
  69
  70static int sr_read_tocentry(struct cdrom_device_info *cdi,
  71                struct cdrom_tocentry *tocentry)
  72{
  73        struct scsi_cd *cd = cdi->handle;
  74        struct packet_command cgc;
  75        int result;
  76        unsigned char *buffer;
  77
  78        buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
  79        if (!buffer)
  80                return -ENOMEM;
  81
  82        memset(&cgc, 0, sizeof(struct packet_command));
  83        cgc.timeout = IOCTL_TIMEOUT;
  84        cgc.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
  85        cgc.cmd[1] |= (tocentry->cdte_format == CDROM_MSF) ? 0x02 : 0;
  86        cgc.cmd[6] = tocentry->cdte_track;
  87        cgc.cmd[8] = 12;                /* LSB of length */
  88        cgc.buffer = buffer;
  89        cgc.buflen = 12;
  90        cgc.data_direction = DMA_FROM_DEVICE;
  91
  92        result = sr_do_ioctl(cd, &cgc);
  93
  94        tocentry->cdte_ctrl = buffer[5] & 0xf;
  95        tocentry->cdte_adr = buffer[5] >> 4;
  96        tocentry->cdte_datamode = (tocentry->cdte_ctrl & 0x04) ? 1 : 0;
  97        if (tocentry->cdte_format == CDROM_MSF) {
  98                tocentry->cdte_addr.msf.minute = buffer[9];
  99                tocentry->cdte_addr.msf.second = buffer[10];
 100                tocentry->cdte_addr.msf.frame = buffer[11];
 101        } else
 102                tocentry->cdte_addr.lba = (((((buffer[8] << 8) + buffer[9]) << 8)
 103                        + buffer[10]) << 8) + buffer[11];
 104
 105        kfree(buffer);
 106        return result;
 107}
 108
 109#define IOCTL_RETRIES 3
 110
 111/* ATAPI drives don't have a SCMD_PLAYAUDIO_TI command.  When these drives
 112   are emulating a SCSI device via the idescsi module, they need to have
 113   CDROMPLAYTRKIND commands translated into CDROMPLAYMSF commands for them */
 114
 115static int sr_fake_playtrkind(struct cdrom_device_info *cdi, struct cdrom_ti *ti)
 116{
 117        struct cdrom_tocentry trk0_te, trk1_te;
 118        struct cdrom_tochdr tochdr;
 119        struct packet_command cgc;
 120        int ntracks, ret;
 121
 122        ret = sr_read_tochdr(cdi, &tochdr);
 123        if (ret)
 124                return ret;
 125
 126        ntracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
 127        
 128        if (ti->cdti_trk1 == ntracks) 
 129                ti->cdti_trk1 = CDROM_LEADOUT;
 130        else if (ti->cdti_trk1 != CDROM_LEADOUT)
 131                ti->cdti_trk1 ++;
 132
 133        trk0_te.cdte_track = ti->cdti_trk0;
 134        trk0_te.cdte_format = CDROM_MSF;
 135        trk1_te.cdte_track = ti->cdti_trk1;
 136        trk1_te.cdte_format = CDROM_MSF;
 137        
 138        ret = sr_read_tocentry(cdi, &trk0_te);
 139        if (ret)
 140                return ret;
 141        ret = sr_read_tocentry(cdi, &trk1_te);
 142        if (ret)
 143                return ret;
 144
 145        memset(&cgc, 0, sizeof(struct packet_command));
 146        cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
 147        cgc.cmd[3] = trk0_te.cdte_addr.msf.minute;
 148        cgc.cmd[4] = trk0_te.cdte_addr.msf.second;
 149        cgc.cmd[5] = trk0_te.cdte_addr.msf.frame;
 150        cgc.cmd[6] = trk1_te.cdte_addr.msf.minute;
 151        cgc.cmd[7] = trk1_te.cdte_addr.msf.second;
 152        cgc.cmd[8] = trk1_te.cdte_addr.msf.frame;
 153        cgc.data_direction = DMA_NONE;
 154        cgc.timeout = IOCTL_TIMEOUT;
 155        return sr_do_ioctl(cdi->handle, &cgc);
 156}
 157
 158static int sr_play_trkind(struct cdrom_device_info *cdi,
 159                struct cdrom_ti *ti)
 160
 161{
 162        struct scsi_cd *cd = cdi->handle;
 163        struct packet_command cgc;
 164        int result;
 165
 166        memset(&cgc, 0, sizeof(struct packet_command));
 167        cgc.timeout = IOCTL_TIMEOUT;
 168        cgc.cmd[0] = GPCMD_PLAYAUDIO_TI;
 169        cgc.cmd[4] = ti->cdti_trk0;
 170        cgc.cmd[5] = ti->cdti_ind0;
 171        cgc.cmd[7] = ti->cdti_trk1;
 172        cgc.cmd[8] = ti->cdti_ind1;
 173        cgc.data_direction = DMA_NONE;
 174
 175        result = sr_do_ioctl(cd, &cgc);
 176        if (result == -EDRIVE_CANT_DO_THIS)
 177                result = sr_fake_playtrkind(cdi, ti);
 178
 179        return result;
 180}
 181
 182/* We do our own retries because we want to know what the specific
 183   error code is.  Normally the UNIT_ATTENTION code will automatically
 184   clear after one error */
 185
 186int sr_do_ioctl(Scsi_CD *cd, struct packet_command *cgc)
 187{
 188        struct scsi_device *SDev;
 189        struct scsi_sense_hdr sshdr;
 190        int result, err = 0, retries = 0;
 191        struct request_sense *sense = cgc->sense;
 192
 193        SDev = cd->device;
 194
 195        if (!sense) {
 196                sense = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
 197                if (!sense) {
 198                        err = -ENOMEM;
 199                        goto out;
 200                }
 201        }
 202
 203      retry:
 204        if (!scsi_block_when_processing_errors(SDev)) {
 205                err = -ENODEV;
 206                goto out;
 207        }
 208
 209        memset(sense, 0, sizeof(*sense));
 210        result = scsi_execute(SDev, cgc->cmd, cgc->data_direction,
 211                              cgc->buffer, cgc->buflen, (char *)sense,
 212                              cgc->timeout, IOCTL_RETRIES, 0, NULL);
 213
 214        scsi_normalize_sense((char *)sense, sizeof(*sense), &sshdr);
 215
 216        /* Minimal error checking.  Ignore cases we know about, and report the rest. */
 217        if (driver_byte(result) != 0) {
 218                switch (sshdr.sense_key) {
 219                case UNIT_ATTENTION:
 220                        SDev->changed = 1;
 221                        if (!cgc->quiet)
 222                                printk(KERN_INFO "%s: disc change detected.\n", cd->cdi.name);
 223                        if (retries++ < 10)
 224                                goto retry;
 225                        err = -ENOMEDIUM;
 226                        break;
 227                case NOT_READY: /* This happens if there is no disc in drive */
 228                        if (sshdr.asc == 0x04 &&
 229                            sshdr.ascq == 0x01) {
 230                                /* sense: Logical unit is in process of becoming ready */
 231                                if (!cgc->quiet)
 232                                        printk(KERN_INFO "%s: CDROM not ready yet.\n", cd->cdi.name);
 233                                if (retries++ < 10) {
 234                                        /* sleep 2 sec and try again */
 235                                        ssleep(2);
 236                                        goto retry;
 237                                } else {
 238                                        /* 20 secs are enough? */
 239                                        err = -ENOMEDIUM;
 240                                        break;
 241                                }
 242                        }
 243                        if (!cgc->quiet)
 244                                printk(KERN_INFO "%s: CDROM not ready.  Make sure there is a disc in the drive.\n", cd->cdi.name);
 245#ifdef DEBUG
 246                        scsi_print_sense_hdr("sr", &sshdr);
 247#endif
 248                        err = -ENOMEDIUM;
 249                        break;
 250                case ILLEGAL_REQUEST:
 251                        err = -EIO;
 252                        if (sshdr.asc == 0x20 &&
 253                            sshdr.ascq == 0x00)
 254                                /* sense: Invalid command operation code */
 255                                err = -EDRIVE_CANT_DO_THIS;
 256#ifdef DEBUG
 257                        __scsi_print_command(cgc->cmd);
 258                        scsi_print_sense_hdr("sr", &sshdr);
 259#endif
 260                        break;
 261                default:
 262                        printk(KERN_ERR "%s: CDROM (ioctl) error, command: ", cd->cdi.name);
 263                        __scsi_print_command(cgc->cmd);
 264                        scsi_print_sense_hdr("sr", &sshdr);
 265                        err = -EIO;
 266                }
 267        }
 268
 269        /* Wake up a process waiting for device */
 270      out:
 271        if (!cgc->sense)
 272                kfree(sense);
 273        cgc->stat = err;
 274        return err;
 275}
 276
 277/* ---------------------------------------------------------------------- */
 278/* interface to cdrom.c                                                   */
 279
 280int sr_tray_move(struct cdrom_device_info *cdi, int pos)
 281{
 282        Scsi_CD *cd = cdi->handle;
 283        struct packet_command cgc;
 284
 285        memset(&cgc, 0, sizeof(struct packet_command));
 286        cgc.cmd[0] = GPCMD_START_STOP_UNIT;
 287        cgc.cmd[4] = (pos == 0) ? 0x03 /* close */ : 0x02 /* eject */ ;
 288        cgc.data_direction = DMA_NONE;
 289        cgc.timeout = IOCTL_TIMEOUT;
 290        return sr_do_ioctl(cd, &cgc);
 291}
 292
 293int sr_lock_door(struct cdrom_device_info *cdi, int lock)
 294{
 295        Scsi_CD *cd = cdi->handle;
 296
 297        return scsi_set_medium_removal(cd->device, lock ?
 298                       SCSI_REMOVAL_PREVENT : SCSI_REMOVAL_ALLOW);
 299}
 300
 301int sr_drive_status(struct cdrom_device_info *cdi, int slot)
 302{
 303        struct scsi_cd *cd = cdi->handle;
 304        struct scsi_sense_hdr sshdr;
 305        struct media_event_desc med;
 306
 307        if (CDSL_CURRENT != slot) {
 308                /* we have no changer support */
 309                return -EINVAL;
 310        }
 311        if (!scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr))
 312                return CDS_DISC_OK;
 313
 314        /* SK/ASC/ASCQ of 2/4/1 means "unit is becoming ready" */
 315        if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
 316                        && sshdr.asc == 0x04 && sshdr.ascq == 0x01)
 317                return CDS_DRIVE_NOT_READY;
 318
 319        if (!cdrom_get_media_event(cdi, &med)) {
 320                if (med.media_present)
 321                        return CDS_DISC_OK;
 322                else if (med.door_open)
 323                        return CDS_TRAY_OPEN;
 324                else
 325                        return CDS_NO_DISC;
 326        }
 327
 328        /*
 329         * SK/ASC/ASCQ of 2/4/2 means "initialization required"
 330         * Using CD_TRAY_OPEN results in an START_STOP_UNIT to close
 331         * the tray, which resolves the initialization requirement.
 332         */
 333        if (scsi_sense_valid(&sshdr) && sshdr.sense_key == NOT_READY
 334                        && sshdr.asc == 0x04 && sshdr.ascq == 0x02)
 335                return CDS_TRAY_OPEN;
 336
 337        /*
 338         * 0x04 is format in progress .. but there must be a disc present!
 339         */
 340        if (sshdr.sense_key == NOT_READY && sshdr.asc == 0x04)
 341                return CDS_DISC_OK;
 342
 343        /*
 344         * If not using Mt Fuji extended media tray reports,
 345         * just return TRAY_OPEN since ATAPI doesn't provide
 346         * any other way to detect this...
 347         */
 348        if (scsi_sense_valid(&sshdr) &&
 349            /* 0x3a is medium not present */
 350            sshdr.asc == 0x3a)
 351                return CDS_NO_DISC;
 352        else
 353                return CDS_TRAY_OPEN;
 354
 355        return CDS_DRIVE_NOT_READY;
 356}
 357
 358int sr_disk_status(struct cdrom_device_info *cdi)
 359{
 360        Scsi_CD *cd = cdi->handle;
 361        struct cdrom_tochdr toc_h;
 362        struct cdrom_tocentry toc_e;
 363        int i, rc, have_datatracks = 0;
 364
 365        /* look for data tracks */
 366        rc = sr_read_tochdr(cdi, &toc_h);
 367        if (rc)
 368                return (rc == -ENOMEDIUM) ? CDS_NO_DISC : CDS_NO_INFO;
 369
 370        for (i = toc_h.cdth_trk0; i <= toc_h.cdth_trk1; i++) {
 371                toc_e.cdte_track = i;
 372                toc_e.cdte_format = CDROM_LBA;
 373                if (sr_read_tocentry(cdi, &toc_e))
 374                        return CDS_NO_INFO;
 375                if (toc_e.cdte_ctrl & CDROM_DATA_TRACK) {
 376                        have_datatracks = 1;
 377                        break;
 378                }
 379        }
 380        if (!have_datatracks)
 381                return CDS_AUDIO;
 382
 383        if (cd->xa_flag)
 384                return CDS_XA_2_1;
 385        else
 386                return CDS_DATA_1;
 387}
 388
 389int sr_get_last_session(struct cdrom_device_info *cdi,
 390                        struct cdrom_multisession *ms_info)
 391{
 392        Scsi_CD *cd = cdi->handle;
 393
 394        ms_info->addr.lba = cd->ms_offset;
 395        ms_info->xa_flag = cd->xa_flag || cd->ms_offset > 0;
 396
 397        return 0;
 398}
 399
 400int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
 401{
 402        Scsi_CD *cd = cdi->handle;
 403        struct packet_command cgc;
 404        char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
 405        int result;
 406
 407        if (!buffer)
 408                return -ENOMEM;
 409
 410        memset(&cgc, 0, sizeof(struct packet_command));
 411        cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
 412        cgc.cmd[2] = 0x40;      /* I do want the subchannel info */
 413        cgc.cmd[3] = 0x02;      /* Give me medium catalog number info */
 414        cgc.cmd[8] = 24;
 415        cgc.buffer = buffer;
 416        cgc.buflen = 24;
 417        cgc.data_direction = DMA_FROM_DEVICE;
 418        cgc.timeout = IOCTL_TIMEOUT;
 419        result = sr_do_ioctl(cd, &cgc);
 420
 421        memcpy(mcn->medium_catalog_number, buffer + 9, 13);
 422        mcn->medium_catalog_number[13] = 0;
 423
 424        kfree(buffer);
 425        return result;
 426}
 427
 428int sr_reset(struct cdrom_device_info *cdi)
 429{
 430        return 0;
 431}
 432
 433int sr_select_speed(struct cdrom_device_info *cdi, int speed)
 434{
 435        Scsi_CD *cd = cdi->handle;
 436        struct packet_command cgc;
 437
 438        if (speed == 0)
 439                speed = 0xffff; /* set to max */
 440        else
 441                speed *= 177;   /* Nx to kbyte/s */
 442
 443        memset(&cgc, 0, sizeof(struct packet_command));
 444        cgc.cmd[0] = GPCMD_SET_SPEED;   /* SET CD SPEED */
 445        cgc.cmd[2] = (speed >> 8) & 0xff;       /* MSB for speed (in kbytes/sec) */
 446        cgc.cmd[3] = speed & 0xff;      /* LSB */
 447        cgc.data_direction = DMA_NONE;
 448        cgc.timeout = IOCTL_TIMEOUT;
 449
 450        if (sr_do_ioctl(cd, &cgc))
 451                return -EIO;
 452        return 0;
 453}
 454
 455/* ----------------------------------------------------------------------- */
 456/* this is called by the generic cdrom driver. arg is a _kernel_ pointer,  */
 457/* because the generic cdrom driver does the user access stuff for us.     */
 458/* only cdromreadtochdr and cdromreadtocentry are left - for use with the  */
 459/* sr_disk_status interface for the generic cdrom driver.                  */
 460
 461int sr_audio_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, void *arg)
 462{
 463        switch (cmd) {
 464        case CDROMREADTOCHDR:
 465                return sr_read_tochdr(cdi, arg);
 466        case CDROMREADTOCENTRY:
 467                return sr_read_tocentry(cdi, arg);
 468        case CDROMPLAYTRKIND:
 469                return sr_play_trkind(cdi, arg);
 470        default:
 471                return -EINVAL;
 472        }
 473}
 474
 475/* -----------------------------------------------------------------------
 476 * a function to read all sorts of funny cdrom sectors using the READ_CD
 477 * scsi-3 mmc command
 478 *
 479 * lba:     linear block address
 480 * format:  0 = data (anything)
 481 *          1 = audio
 482 *          2 = data (mode 1)
 483 *          3 = data (mode 2)
 484 *          4 = data (mode 2 form1)
 485 *          5 = data (mode 2 form2)
 486 * blksize: 2048 | 2336 | 2340 | 2352
 487 */
 488
 489static int sr_read_cd(Scsi_CD *cd, unsigned char *dest, int lba, int format, int blksize)
 490{
 491        struct packet_command cgc;
 492
 493#ifdef DEBUG
 494        printk("%s: sr_read_cd lba=%d format=%d blksize=%d\n",
 495               cd->cdi.name, lba, format, blksize);
 496#endif
 497
 498        memset(&cgc, 0, sizeof(struct packet_command));
 499        cgc.cmd[0] = GPCMD_READ_CD;     /* READ_CD */
 500        cgc.cmd[1] = ((format & 7) << 2);
 501        cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
 502        cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
 503        cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
 504        cgc.cmd[5] = (unsigned char) lba & 0xff;
 505        cgc.cmd[8] = 1;
 506        switch (blksize) {
 507        case 2336:
 508                cgc.cmd[9] = 0x58;
 509                break;
 510        case 2340:
 511                cgc.cmd[9] = 0x78;
 512                break;
 513        case 2352:
 514                cgc.cmd[9] = 0xf8;
 515                break;
 516        default:
 517                cgc.cmd[9] = 0x10;
 518                break;
 519        }
 520        cgc.buffer = dest;
 521        cgc.buflen = blksize;
 522        cgc.data_direction = DMA_FROM_DEVICE;
 523        cgc.timeout = IOCTL_TIMEOUT;
 524        return sr_do_ioctl(cd, &cgc);
 525}
 526
 527/*
 528 * read sectors with blocksizes other than 2048
 529 */
 530
 531static int sr_read_sector(Scsi_CD *cd, int lba, int blksize, unsigned char *dest)
 532{
 533        struct packet_command cgc;
 534        int rc;
 535
 536        /* we try the READ CD command first... */
 537        if (cd->readcd_known) {
 538                rc = sr_read_cd(cd, dest, lba, 0, blksize);
 539                if (-EDRIVE_CANT_DO_THIS != rc)
 540                        return rc;
 541                cd->readcd_known = 0;
 542                printk("CDROM does'nt support READ CD (0xbe) command\n");
 543                /* fall & retry the other way */
 544        }
 545        /* ... if this fails, we switch the blocksize using MODE SELECT */
 546        if (blksize != cd->device->sector_size) {
 547                if (0 != (rc = sr_set_blocklength(cd, blksize)))
 548                        return rc;
 549        }
 550#ifdef DEBUG
 551        printk("%s: sr_read_sector lba=%d blksize=%d\n", cd->cdi.name, lba, blksize);
 552#endif
 553
 554        memset(&cgc, 0, sizeof(struct packet_command));
 555        cgc.cmd[0] = GPCMD_READ_10;
 556        cgc.cmd[2] = (unsigned char) (lba >> 24) & 0xff;
 557        cgc.cmd[3] = (unsigned char) (lba >> 16) & 0xff;
 558        cgc.cmd[4] = (unsigned char) (lba >> 8) & 0xff;
 559        cgc.cmd[5] = (unsigned char) lba & 0xff;
 560        cgc.cmd[8] = 1;
 561        cgc.buffer = dest;
 562        cgc.buflen = blksize;
 563        cgc.data_direction = DMA_FROM_DEVICE;
 564        cgc.timeout = IOCTL_TIMEOUT;
 565        rc = sr_do_ioctl(cd, &cgc);
 566
 567        return rc;
 568}
 569
 570/*
 571 * read a sector in raw mode to check the sector format
 572 * ret: 1 == mode2 (XA), 0 == mode1, <0 == error 
 573 */
 574
 575int sr_is_xa(Scsi_CD *cd)
 576{
 577        unsigned char *raw_sector;
 578        int is_xa;
 579
 580        if (!xa_test)
 581                return 0;
 582
 583        raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
 584        if (!raw_sector)
 585                return -ENOMEM;
 586        if (0 == sr_read_sector(cd, cd->ms_offset + 16,
 587                                CD_FRAMESIZE_RAW1, raw_sector)) {
 588                is_xa = (raw_sector[3] == 0x02) ? 1 : 0;
 589        } else {
 590                /* read a raw sector failed for some reason. */
 591                is_xa = -1;
 592        }
 593        kfree(raw_sector);
 594#ifdef DEBUG
 595        printk("%s: sr_is_xa: %d\n", cd->cdi.name, is_xa);
 596#endif
 597        return is_xa;
 598}
 599
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