root/drivers/scsi/sr_ioctl.c

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DEFINITIONS

This source file includes following definitions.
  1. sr_ioctl_done
  2. do_ioctl
  3. sr_ioctl

   1 #ifdef MODULE
   2 #include <linux/autoconf.h>
   3 #include <linux/module.h>
   4 #include <linux/version.h>
   5 #endif /* MODULE */
   6 
   7 #include <linux/kernel.h>
   8 #include <linux/sched.h>
   9 #include <linux/mm.h>
  10 #include <linux/fs.h>
  11 #include <asm/segment.h>
  12 #include <linux/errno.h>
  13 
  14 #include "../block/blk.h"
  15 #include "scsi.h"
  16 #include "hosts.h"
  17 #include "sr.h"
  18 #include "scsi_ioctl.h"
  19 
  20 #include <linux/cdrom.h>
  21 
  22 #define IOCTL_RETRIES 3
  23 /* The CDROM is fairly slow, so we need a little extra time */
  24 /* In fact, it is very slow if it has to spin up first */
  25 #define IOCTL_TIMEOUT 3000
  26 
  27 static void sr_ioctl_done(Scsi_Cmnd * SCpnt)
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  28 {
  29     struct request * req;
  30     
  31     req = &SCpnt->request;
  32     req->rq_status = RQ_SCSI_DONE; /* Busy, but indicate request done */
  33     
  34     if (req->sem != NULL) {
  35         up(req->sem);
  36     }
  37 }
  38 
  39 /* We do our own retries because we want to know what the specific
  40    error code is.  Normally the UNIT_ATTENTION code will automatically
  41    clear after one error */
  42 
  43 static int do_ioctl(int target, unsigned char * sr_cmd, void * buffer, unsigned buflength)
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  44 {
  45     Scsi_Cmnd * SCpnt;
  46     int result;
  47     
  48     SCpnt = allocate_device(NULL, scsi_CDs[target].device, 1);
  49     scsi_do_cmd(SCpnt,
  50                 (void *) sr_cmd, buffer, buflength, sr_ioctl_done, 
  51                 IOCTL_TIMEOUT, IOCTL_RETRIES);
  52     
  53     
  54     if (SCpnt->request.rq_status != RQ_SCSI_DONE){
  55         struct semaphore sem = MUTEX_LOCKED;
  56         SCpnt->request.sem = &sem;
  57         down(&sem);
  58         /* Hmm.. Have to ask about this */
  59         while (SCpnt->request.rq_status != RQ_SCSI_DONE)
  60           schedule();
  61     };
  62     
  63     result = SCpnt->result;
  64     
  65     /* Minimal error checking.  Ignore cases we know about, and report the rest. */
  66     if(driver_byte(result) != 0)
  67         switch(SCpnt->sense_buffer[2] & 0xf) {
  68         case UNIT_ATTENTION:
  69             scsi_CDs[target].device->changed = 1;
  70             printk("Disc change detected.\n");
  71             break;
  72         case NOT_READY: /* This happens if there is no disc in drive */
  73             printk("CDROM not ready.  Make sure there is a disc in the drive.\n");
  74             break;
  75         case ILLEGAL_REQUEST:
  76             printk("CDROM (ioctl) reports ILLEGAL REQUEST.\n");
  77             break;
  78         default:
  79             printk("SCSI CD error: host %d id %d lun %d return code = %03x\n", 
  80                    scsi_CDs[target].device->host->host_no, 
  81                    scsi_CDs[target].device->id,
  82                    scsi_CDs[target].device->lun,
  83                    result);
  84             printk("\tSense class %x, sense error %x, extended sense %x\n",
  85                    sense_class(SCpnt->sense_buffer[0]), 
  86                    sense_error(SCpnt->sense_buffer[0]),
  87                    SCpnt->sense_buffer[2] & 0xf);
  88             
  89         };
  90     
  91     result = SCpnt->result;
  92     SCpnt->request.rq_status = RQ_INACTIVE; /* Deallocate */
  93     wake_up(&SCpnt->device->device_wait);
  94     /* Wake up a process waiting for device*/
  95     return result;
  96 }
  97 
  98 int sr_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg)
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  99 {
 100     u_char  sr_cmd[10];
 101     
 102     kdev_t dev = inode->i_rdev;
 103     int result, target, err;
 104     
 105     target = MINOR(dev);
 106     
 107     if (target >= sr_template.nr_dev ||
 108         !scsi_CDs[target].device) return -ENXIO;
 109     
 110     switch (cmd) 
 111     {
 112         /* Sun-compatible */
 113     case CDROMPAUSE:
 114         
 115         sr_cmd[0] = SCMD_PAUSE_RESUME;
 116         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 117         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = 0;
 118         sr_cmd[5] = sr_cmd[6] = sr_cmd[7] = 0;
 119         sr_cmd[8] = 0;
 120         sr_cmd[9] = 0;
 121         
 122         result = do_ioctl(target, sr_cmd, NULL, 255);
 123         return result;
 124         
 125     case CDROMRESUME:
 126         
 127         sr_cmd[0] = SCMD_PAUSE_RESUME;
 128         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 129         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = 0;
 130         sr_cmd[5] = sr_cmd[6] = sr_cmd[7] = 0;
 131         sr_cmd[8] = 1;
 132         sr_cmd[9] = 0;
 133         
 134         result = do_ioctl(target, sr_cmd, NULL, 255);
 135         
 136         return result;
 137         
 138     case CDROMPLAYMSF:
 139     {
 140         struct cdrom_msf msf;
 141 
 142         err = verify_area (VERIFY_READ, (void *) arg, sizeof (msf));
 143         if (err) return err;
 144 
 145         memcpy_fromfs(&msf, (void *) arg, sizeof(msf));
 146         
 147         sr_cmd[0] = SCMD_PLAYAUDIO_MSF;
 148         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 149         sr_cmd[2] = 0;
 150         sr_cmd[3] = msf.cdmsf_min0;
 151         sr_cmd[4] = msf.cdmsf_sec0;
 152         sr_cmd[5] = msf.cdmsf_frame0;
 153         sr_cmd[6] = msf.cdmsf_min1;
 154         sr_cmd[7] = msf.cdmsf_sec1;
 155         sr_cmd[8] = msf.cdmsf_frame1;
 156         sr_cmd[9] = 0;
 157         
 158         result = do_ioctl(target, sr_cmd, NULL, 255);
 159         return result;
 160     }
 161         
 162     case CDROMPLAYTRKIND:
 163     {
 164         struct cdrom_ti ti;
 165 
 166         err = verify_area (VERIFY_READ, (void *) arg, sizeof (ti));
 167         if (err) return err;
 168 
 169         memcpy_fromfs(&ti, (void *) arg, sizeof(ti));
 170         
 171         sr_cmd[0] = SCMD_PLAYAUDIO_TI;
 172         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 173         sr_cmd[2] = 0;
 174         sr_cmd[3] = 0;
 175         sr_cmd[4] = ti.cdti_trk0;
 176         sr_cmd[5] = ti.cdti_ind0;
 177         sr_cmd[6] = 0;
 178         sr_cmd[7] = ti.cdti_trk1;
 179         sr_cmd[8] = ti.cdti_ind1;
 180         sr_cmd[9] = 0;
 181         
 182         result = do_ioctl(target, sr_cmd, NULL, 255);
 183         
 184         return result;
 185     }
 186         
 187     case CDROMREADTOCHDR:
 188     {
 189         struct cdrom_tochdr tochdr;
 190         char * buffer;
 191         
 192         sr_cmd[0] = SCMD_READ_TOC;
 193         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 194         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 195         sr_cmd[6] = 0;
 196         sr_cmd[7] = 0;              /* MSB of length (12) */
 197         sr_cmd[8] = 12;             /* LSB of length */
 198         sr_cmd[9] = 0;
 199         
 200         buffer = (unsigned char *) scsi_malloc(512);
 201         if(!buffer) return -ENOMEM;
 202         
 203         result = do_ioctl(target, sr_cmd, buffer, 12);
 204         
 205         tochdr.cdth_trk0 = buffer[2];
 206         tochdr.cdth_trk1 = buffer[3];
 207         
 208         scsi_free(buffer, 512);
 209         
 210         err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_tochdr));
 211         if (err)
 212             return err;
 213         memcpy_tofs ((void *) arg, &tochdr, sizeof (struct cdrom_tochdr));
 214         
 215         return result;
 216     }
 217         
 218     case CDROMREADTOCENTRY:
 219     {
 220         struct cdrom_tocentry tocentry;
 221         char * buffer;
 222         
 223         err = verify_area (VERIFY_READ, (void *) arg, sizeof (struct cdrom_tocentry));
 224         if (err) return err;
 225 
 226         memcpy_fromfs (&tocentry, (void *) arg, sizeof (struct cdrom_tocentry));
 227         
 228         sr_cmd[0] = SCMD_READ_TOC;
 229         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 230         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 231         sr_cmd[6] = tocentry.cdte_track;
 232         sr_cmd[7] = 0;             /* MSB of length (12)  */
 233         sr_cmd[8] = 12;            /* LSB of length */
 234         sr_cmd[9] = 0;
 235         
 236         buffer = (unsigned char *) scsi_malloc(512);
 237         if(!buffer) return -ENOMEM;
 238         
 239         result = do_ioctl (target, sr_cmd, buffer, 12);
 240         
 241         if (tocentry.cdte_format == CDROM_MSF) {
 242             tocentry.cdte_addr.msf.minute = buffer[9];
 243             tocentry.cdte_addr.msf.second = buffer[10];
 244             tocentry.cdte_addr.msf.frame = buffer[11];
 245             tocentry.cdte_ctrl = buffer[5] & 0xf;
 246         }
 247         else
 248             tocentry.cdte_addr.lba = (int) buffer[0];
 249         
 250         scsi_free(buffer, 512);
 251         
 252         err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_tocentry));
 253         if (err)
 254             return err;
 255         memcpy_tofs ((void *) arg, &tocentry, sizeof (struct cdrom_tocentry));
 256         
 257         return result;
 258     }
 259         
 260     case CDROMSTOP:
 261         sr_cmd[0] = START_STOP;
 262         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 1;
 263         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 264         sr_cmd[4] = 0;
 265         
 266         result = do_ioctl(target, sr_cmd, NULL, 255);
 267         return result;
 268         
 269     case CDROMSTART:
 270         sr_cmd[0] = START_STOP;
 271         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 1;
 272         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 273         sr_cmd[4] = 1;
 274         
 275         result = do_ioctl(target, sr_cmd, NULL, 255);
 276         return result;
 277         
 278     case CDROMEJECT:
 279         /*
 280          * Allow 0 for access count for auto-eject feature.
 281          */
 282         if (scsi_CDs[target].device -> access_count > 1)
 283             return -EBUSY;
 284         
 285         sr_ioctl (inode, NULL, SCSI_IOCTL_DOORUNLOCK, 0);
 286         sr_cmd[0] = START_STOP;
 287         sr_cmd[1] = ((scsi_CDs[target].device -> lun) << 5) | 1;
 288         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 289         sr_cmd[4] = 0x02;
 290         
 291         if (!(result = do_ioctl(target, sr_cmd, NULL, 255)))
 292             scsi_CDs[target].device -> changed = 1;
 293         
 294         return result;
 295         
 296     case CDROMEJECT_SW:
 297         scsi_CDs[target].auto_eject = !!arg;
 298         return 0;
 299 
 300     case CDROMVOLCTRL:
 301     {
 302         char * buffer, * mask;
 303         struct cdrom_volctrl volctrl;
 304         
 305         err = verify_area (VERIFY_READ, (void *) arg, sizeof (struct cdrom_volctrl));
 306         if (err) return err;
 307 
 308         memcpy_fromfs (&volctrl, (void *) arg, sizeof (struct cdrom_volctrl));
 309         
 310         /* First we get the current params so we can just twiddle the volume */
 311         
 312         sr_cmd[0] = MODE_SENSE;
 313         sr_cmd[1] = (scsi_CDs[target].device -> lun) << 5;
 314         sr_cmd[2] = 0xe;    /* Want mode page 0xe, CDROM audio params */
 315         sr_cmd[3] = 0;
 316         sr_cmd[4] = 28;
 317         sr_cmd[5] = 0;
 318         
 319         buffer = (unsigned char *) scsi_malloc(512);
 320         if(!buffer) return -ENOMEM;
 321         
 322         if ((result = do_ioctl (target, sr_cmd, buffer, 28))) {
 323             printk ("Hosed while obtaining audio mode page\n");
 324             scsi_free(buffer, 512);
 325             return result;
 326         }
 327         
 328         sr_cmd[0] = MODE_SENSE;
 329         sr_cmd[1] = (scsi_CDs[target].device -> lun) << 5;
 330         sr_cmd[2] = 0x4e;   /* Want the mask for mode page 0xe */
 331         sr_cmd[3] = 0;
 332         sr_cmd[4] = 28;
 333         sr_cmd[5] = 0;
 334         
 335         mask = (unsigned char *) scsi_malloc(512);
 336         if(!mask) {
 337             scsi_free(buffer, 512);
 338             return -ENOMEM;
 339         };
 340 
 341         if ((result = do_ioctl (target, sr_cmd, mask, 28))) {
 342             printk ("Hosed while obtaining mask for audio mode page\n");
 343             scsi_free(buffer, 512);
 344             scsi_free(mask, 512);
 345             return result;
 346         }
 347         
 348         /* Now mask and substitute our own volume and reuse the rest */
 349         buffer[0] = 0;  /* Clear reserved field */
 350         
 351         buffer[21] = volctrl.channel0 & mask[21];
 352         buffer[23] = volctrl.channel1 & mask[23];
 353         buffer[25] = volctrl.channel2 & mask[25];
 354         buffer[27] = volctrl.channel3 & mask[27];
 355         
 356         sr_cmd[0] = MODE_SELECT;
 357         sr_cmd[1] = ((scsi_CDs[target].device -> lun) << 5) | 0x10;    /* Params are SCSI-2 */
 358         sr_cmd[2] = sr_cmd[3] = 0;
 359         sr_cmd[4] = 28;
 360         sr_cmd[5] = 0;
 361         
 362         result = do_ioctl (target, sr_cmd, buffer, 28);
 363         scsi_free(buffer, 512);
 364         scsi_free(mask, 512);
 365         return result;
 366     }
 367         
 368     case CDROMSUBCHNL:
 369     {
 370         struct cdrom_subchnl subchnl;
 371         char * buffer;
 372         
 373         sr_cmd[0] = SCMD_READ_SUBCHANNEL;
 374         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 375         sr_cmd[2] = 0x40;    /* I do want the subchannel info */
 376         sr_cmd[3] = 0x01;    /* Give me current position info */
 377         sr_cmd[4] = sr_cmd[5] = 0;
 378         sr_cmd[6] = 0;
 379         sr_cmd[7] = 0;
 380         sr_cmd[8] = 16;
 381         sr_cmd[9] = 0;
 382         
 383         buffer = (unsigned char*) scsi_malloc(512);
 384         if(!buffer) return -ENOMEM;
 385         
 386         result = do_ioctl(target, sr_cmd, buffer, 16);
 387         
 388         subchnl.cdsc_audiostatus = buffer[1];
 389         subchnl.cdsc_format = CDROM_MSF;
 390         subchnl.cdsc_ctrl = buffer[5] & 0xf;
 391         subchnl.cdsc_trk = buffer[6];
 392         subchnl.cdsc_ind = buffer[7];
 393         
 394         subchnl.cdsc_reladdr.msf.minute = buffer[13];
 395         subchnl.cdsc_reladdr.msf.second = buffer[14];
 396         subchnl.cdsc_reladdr.msf.frame = buffer[15];
 397         subchnl.cdsc_absaddr.msf.minute = buffer[9];
 398         subchnl.cdsc_absaddr.msf.second = buffer[10];
 399         subchnl.cdsc_absaddr.msf.frame = buffer[11];
 400         
 401         scsi_free(buffer, 512);
 402         
 403         err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_subchnl));
 404         if (err)
 405             return err;
 406         memcpy_tofs ((void *) arg, &subchnl, sizeof (struct cdrom_subchnl));
 407         return result;
 408     }
 409         
 410     case CDROMREADMODE2:
 411         return -EINVAL;
 412     case CDROMREADMODE1:
 413         return -EINVAL;
 414         
 415         /* block-copy from ../block/sbpcd.c with some adjustments... */
 416     case CDROMMULTISESSION: /* tell start-of-last-session to user */
 417     {
 418         struct cdrom_multisession  ms_info;
 419         long                       lba;
 420         
 421         err = verify_area(VERIFY_READ, (void *) arg,
 422                           sizeof(struct cdrom_multisession));
 423         if (err) return (err);
 424         
 425         memcpy_fromfs(&ms_info, (void *) arg, sizeof(struct cdrom_multisession));
 426         
 427         if (ms_info.addr_format==CDROM_MSF) { /* MSF-bin requested */
 428             lba = scsi_CDs[target].mpcd_sector+CD_BLOCK_OFFSET;
 429             ms_info.addr.msf.minute = lba / (CD_SECS*CD_FRAMES);
 430             lba %= CD_SECS*CD_FRAMES;
 431             ms_info.addr.msf.second = lba / CD_FRAMES;
 432             ms_info.addr.msf.frame  = lba % CD_FRAMES;
 433         } else if (ms_info.addr_format==CDROM_LBA) /* lba requested */
 434             ms_info.addr.lba=scsi_CDs[target].mpcd_sector;
 435         else return (-EINVAL);
 436         
 437         ms_info.xa_flag=scsi_CDs[target].xa_flags & 0x01;
 438         
 439         err=verify_area(VERIFY_WRITE,(void *) arg,
 440                         sizeof(struct cdrom_multisession));
 441         if (err) return (err);
 442         
 443         memcpy_tofs((void *) arg, &ms_info, sizeof(struct cdrom_multisession));
 444         return (0);
 445     }
 446         
 447     case BLKRASET:
 448         if(!suser())  return -EACCES;
 449         if(!(inode->i_rdev)) return -EINVAL;
 450         if(arg > 0xff) return -EINVAL;
 451         read_ahead[MAJOR(inode->i_rdev)] = arg;
 452         return 0;
 453         RO_IOCTLS(dev,arg);
 454     default:
 455         return scsi_ioctl(scsi_CDs[target].device,cmd,(void *) arg);
 456     }
 457 }
 458 
 459 /*
 460  * Overrides for Emacs so that we follow Linus's tabbing style.
 461  * Emacs will notice this stuff at the end of the file and automatically
 462  * adjust the settings for this buffer only.  This must remain at the end
 463  * of the file.
 464  * ---------------------------------------------------------------------------
 465  * Local variables:
 466  * c-indent-level: 4
 467  * c-brace-imaginary-offset: 0
 468  * c-brace-offset: -4
 469  * c-argdecl-indent: 4
 470  * c-label-offset: -4
 471  * c-continued-statement-offset: 4
 472  * c-continued-brace-offset: 0
 473  * indent-tabs-mode: nil
 474  * tab-width: 8
 475  * End:
 476  */

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