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 extern int scsi_ioctl (Scsi_Device *dev, int cmd, void *arg);
  28 
  29 static void sr_ioctl_done(Scsi_Cmnd * SCpnt)
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  30 {
  31     struct request * req;
  32     
  33     req = &SCpnt->request;
  34     req->dev = 0xfffe; /* Busy, but indicate request done */
  35     
  36     if (req->sem != NULL) {
  37         up(req->sem);
  38     }
  39 }
  40 
  41 /* We do our own retries because we want to know what the specific
  42    error code is.  Normally the UNIT_ATTENTION code will automatically
  43    clear after one error */
  44 
  45 static int do_ioctl(int target, unsigned char * sr_cmd, void * buffer, unsigned buflength)
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  46 {
  47     Scsi_Cmnd * SCpnt;
  48     int result;
  49     
  50     SCpnt = allocate_device(NULL, scsi_CDs[target].device, 1);
  51     scsi_do_cmd(SCpnt,
  52                 (void *) sr_cmd, buffer, buflength, sr_ioctl_done, 
  53                 IOCTL_TIMEOUT, IOCTL_RETRIES);
  54     
  55     
  56     if (SCpnt->request.dev != 0xfffe){
  57         struct semaphore sem = MUTEX_LOCKED;
  58         SCpnt->request.sem = &sem;
  59         down(&sem);
  60         /* Hmm.. Have to ask about this */
  61         while (SCpnt->request.dev != 0xfffe) schedule();
  62     };
  63     
  64     result = SCpnt->result;
  65     
  66     /* Minimal error checking.  Ignore cases we know about, and report the rest. */
  67     if(driver_byte(result) != 0)
  68         switch(SCpnt->sense_buffer[2] & 0xf) {
  69         case UNIT_ATTENTION:
  70             scsi_CDs[target].device->changed = 1;
  71             printk("Disc change detected.\n");
  72             break;
  73         case NOT_READY: /* This happens if there is no disc in drive */
  74             printk("CDROM not ready.  Make sure there is a disc in the drive.\n");
  75             break;
  76         case ILLEGAL_REQUEST:
  77             printk("CDROM (ioctl) reports ILLEGAL REQUEST.\n");
  78             break;
  79         default:
  80             printk("SCSI CD error: host %d id %d lun %d return code = %03x\n", 
  81                    scsi_CDs[target].device->host->host_no, 
  82                    scsi_CDs[target].device->id,
  83                    scsi_CDs[target].device->lun,
  84                    result);
  85             printk("\tSense class %x, sense error %x, extended sense %x\n",
  86                    sense_class(SCpnt->sense_buffer[0]), 
  87                    sense_error(SCpnt->sense_buffer[0]),
  88                    SCpnt->sense_buffer[2] & 0xf);
  89             
  90         };
  91     
  92     result = SCpnt->result;
  93     SCpnt->request.dev = -1; /* Deallocate */
  94     wake_up(&SCpnt->device->device_wait);
  95     /* Wake up a process waiting for device*/
  96     return result;
  97 }
  98 
  99 int sr_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg)
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 100 {
 101     u_char  sr_cmd[10];
 102     
 103     int dev = inode->i_rdev;
 104     int result, target, err;
 105     
 106     target = MINOR(dev);
 107     
 108     if (target >= sr_template.nr_dev ||
 109         !scsi_CDs[target].device) return -ENXIO;
 110     
 111     switch (cmd) 
 112     {
 113         /* Sun-compatible */
 114     case CDROMPAUSE:
 115         
 116         sr_cmd[0] = SCMD_PAUSE_RESUME;
 117         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 118         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = 0;
 119         sr_cmd[5] = sr_cmd[6] = sr_cmd[7] = 0;
 120         sr_cmd[8] = 0;
 121         sr_cmd[9] = 0;
 122         
 123         result = do_ioctl(target, sr_cmd, NULL, 255);
 124         return result;
 125         
 126     case CDROMRESUME:
 127         
 128         sr_cmd[0] = SCMD_PAUSE_RESUME;
 129         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 130         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = 0;
 131         sr_cmd[5] = sr_cmd[6] = sr_cmd[7] = 0;
 132         sr_cmd[8] = 1;
 133         sr_cmd[9] = 0;
 134         
 135         result = do_ioctl(target, sr_cmd, NULL, 255);
 136         
 137         return result;
 138         
 139     case CDROMPLAYMSF:
 140     {
 141         struct cdrom_msf msf;
 142 
 143         err = verify_area (VERIFY_READ, (void *) arg, sizeof (msf));
 144         if (err) return err;
 145 
 146         memcpy_fromfs(&msf, (void *) arg, sizeof(msf));
 147         
 148         sr_cmd[0] = SCMD_PLAYAUDIO_MSF;
 149         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 150         sr_cmd[2] = 0;
 151         sr_cmd[3] = msf.cdmsf_min0;
 152         sr_cmd[4] = msf.cdmsf_sec0;
 153         sr_cmd[5] = msf.cdmsf_frame0;
 154         sr_cmd[6] = msf.cdmsf_min1;
 155         sr_cmd[7] = msf.cdmsf_sec1;
 156         sr_cmd[8] = msf.cdmsf_frame1;
 157         sr_cmd[9] = 0;
 158         
 159         result = do_ioctl(target, sr_cmd, NULL, 255);
 160         return result;
 161     }
 162         
 163     case CDROMPLAYTRKIND:
 164     {
 165         struct cdrom_ti ti;
 166 
 167         err = verify_area (VERIFY_READ, (void *) arg, sizeof (ti));
 168         if (err) return err;
 169 
 170         memcpy_fromfs(&ti, (void *) arg, sizeof(ti));
 171         
 172         sr_cmd[0] = SCMD_PLAYAUDIO_TI;
 173         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 174         sr_cmd[2] = 0;
 175         sr_cmd[3] = 0;
 176         sr_cmd[4] = ti.cdti_trk0;
 177         sr_cmd[5] = ti.cdti_ind0;
 178         sr_cmd[6] = 0;
 179         sr_cmd[7] = ti.cdti_trk1;
 180         sr_cmd[8] = ti.cdti_ind1;
 181         sr_cmd[9] = 0;
 182         
 183         result = do_ioctl(target, sr_cmd, NULL, 255);
 184         
 185         return result;
 186     }
 187         
 188     case CDROMREADTOCHDR:
 189     {
 190         struct cdrom_tochdr tochdr;
 191         char * buffer;
 192         
 193         sr_cmd[0] = SCMD_READ_TOC;
 194         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 195         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 196         sr_cmd[6] = 0;
 197         sr_cmd[7] = 0;              /* MSB of length (12) */
 198         sr_cmd[8] = 12;             /* LSB of length */
 199         sr_cmd[9] = 0;
 200         
 201         buffer = (unsigned char *) scsi_malloc(512);
 202         if(!buffer) return -ENOMEM;
 203         
 204         result = do_ioctl(target, sr_cmd, buffer, 12);
 205         
 206         tochdr.cdth_trk0 = buffer[2];
 207         tochdr.cdth_trk1 = buffer[3];
 208         
 209         scsi_free(buffer, 512);
 210         
 211         err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_tochdr));
 212         if (err)
 213             return err;
 214         memcpy_tofs ((void *) arg, &tochdr, sizeof (struct cdrom_tochdr));
 215         
 216         return result;
 217     }
 218         
 219     case CDROMREADTOCENTRY:
 220     {
 221         struct cdrom_tocentry tocentry;
 222         char * buffer;
 223         
 224         err = verify_area (VERIFY_READ, (void *) arg, sizeof (struct cdrom_tocentry));
 225         if (err) return err;
 226 
 227         memcpy_fromfs (&tocentry, (void *) arg, sizeof (struct cdrom_tocentry));
 228         
 229         sr_cmd[0] = SCMD_READ_TOC;
 230         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 231         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 232         sr_cmd[6] = tocentry.cdte_track;
 233         sr_cmd[7] = 0;             /* MSB of length (12)  */
 234         sr_cmd[8] = 12;            /* LSB of length */
 235         sr_cmd[9] = 0;
 236         
 237         buffer = (unsigned char *) scsi_malloc(512);
 238         if(!buffer) return -ENOMEM;
 239         
 240         result = do_ioctl (target, sr_cmd, buffer, 12);
 241         
 242         if (tocentry.cdte_format == CDROM_MSF) {
 243             tocentry.cdte_addr.msf.minute = buffer[9];
 244             tocentry.cdte_addr.msf.second = buffer[10];
 245             tocentry.cdte_addr.msf.frame = buffer[11];
 246             tocentry.cdte_ctrl = buffer[5] & 0xf;
 247         }
 248         else
 249             tocentry.cdte_addr.lba = (int) buffer[0];
 250         
 251         scsi_free(buffer, 512);
 252         
 253         err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_tocentry));
 254         if (err)
 255             return err;
 256         memcpy_tofs ((void *) arg, &tocentry, sizeof (struct cdrom_tocentry));
 257         
 258         return result;
 259     }
 260         
 261     case CDROMSTOP:
 262         sr_cmd[0] = START_STOP;
 263         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 1;
 264         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 265         sr_cmd[4] = 0;
 266         
 267         result = do_ioctl(target, sr_cmd, NULL, 255);
 268         return result;
 269         
 270     case CDROMSTART:
 271         sr_cmd[0] = START_STOP;
 272         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 1;
 273         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 274         sr_cmd[4] = 1;
 275         
 276         result = do_ioctl(target, sr_cmd, NULL, 255);
 277         return result;
 278         
 279     case CDROMEJECT:
 280         /*
 281          * Allow 0 for access count for auto-eject feature.
 282          */
 283         if (scsi_CDs[target].device -> access_count > 1)
 284             return -EBUSY;
 285         
 286         sr_ioctl (inode, NULL, SCSI_IOCTL_DOORUNLOCK, 0);
 287         sr_cmd[0] = START_STOP;
 288         sr_cmd[1] = ((scsi_CDs[target].device -> lun) << 5) | 1;
 289         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 290         sr_cmd[4] = 0x02;
 291         
 292         if (!(result = do_ioctl(target, sr_cmd, NULL, 255)))
 293             scsi_CDs[target].device -> changed = 1;
 294         
 295         return result;
 296         
 297     case CDROMEJECT_SW:
 298         scsi_CDs[target].auto_eject = !!arg;
 299         return 0;
 300 
 301     case CDROMVOLCTRL:
 302     {
 303         char * buffer, * mask;
 304         struct cdrom_volctrl volctrl;
 305         
 306         err = verify_area (VERIFY_READ, (void *) arg, sizeof (struct cdrom_volctrl));
 307         if (err) return err;
 308 
 309         memcpy_fromfs (&volctrl, (void *) arg, sizeof (struct cdrom_volctrl));
 310         
 311         /* First we get the current params so we can just twiddle the volume */
 312         
 313         sr_cmd[0] = MODE_SENSE;
 314         sr_cmd[1] = (scsi_CDs[target].device -> lun) << 5;
 315         sr_cmd[2] = 0xe;    /* Want mode page 0xe, CDROM audio params */
 316         sr_cmd[3] = 0;
 317         sr_cmd[4] = 28;
 318         sr_cmd[5] = 0;
 319         
 320         buffer = (unsigned char *) scsi_malloc(512);
 321         if(!buffer) return -ENOMEM;
 322         
 323         if ((result = do_ioctl (target, sr_cmd, buffer, 28))) {
 324             printk ("Hosed while obtaining audio mode page\n");
 325             scsi_free(buffer, 512);
 326             return result;
 327         }
 328         
 329         sr_cmd[0] = MODE_SENSE;
 330         sr_cmd[1] = (scsi_CDs[target].device -> lun) << 5;
 331         sr_cmd[2] = 0x4e;   /* Want the mask for mode page 0xe */
 332         sr_cmd[3] = 0;
 333         sr_cmd[4] = 28;
 334         sr_cmd[5] = 0;
 335         
 336         mask = (unsigned char *) scsi_malloc(512);
 337         if(!mask) {
 338             scsi_free(buffer, 512);
 339             return -ENOMEM;
 340         };
 341 
 342         if ((result = do_ioctl (target, sr_cmd, mask, 28))) {
 343             printk ("Hosed while obtaining mask for audio mode page\n");
 344             scsi_free(buffer, 512);
 345             scsi_free(mask, 512);
 346             return result;
 347         }
 348         
 349         /* Now mask and substitute our own volume and reuse the rest */
 350         buffer[0] = 0;  /* Clear reserved field */
 351         
 352         buffer[21] = volctrl.channel0 & mask[21];
 353         buffer[23] = volctrl.channel1 & mask[23];
 354         buffer[25] = volctrl.channel2 & mask[25];
 355         buffer[27] = volctrl.channel3 & mask[27];
 356         
 357         sr_cmd[0] = MODE_SELECT;
 358         sr_cmd[1] = ((scsi_CDs[target].device -> lun) << 5) | 0x10;    /* Params are SCSI-2 */
 359         sr_cmd[2] = sr_cmd[3] = 0;
 360         sr_cmd[4] = 28;
 361         sr_cmd[5] = 0;
 362         
 363         result = do_ioctl (target, sr_cmd, buffer, 28);
 364         scsi_free(buffer, 512);
 365         scsi_free(mask, 512);
 366         return result;
 367     }
 368         
 369     case CDROMSUBCHNL:
 370     {
 371         struct cdrom_subchnl subchnl;
 372         char * buffer;
 373         
 374         sr_cmd[0] = SCMD_READ_SUBCHANNEL;
 375         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 376         sr_cmd[2] = 0x40;    /* I do want the subchannel info */
 377         sr_cmd[3] = 0x01;    /* Give me current position info */
 378         sr_cmd[4] = sr_cmd[5] = 0;
 379         sr_cmd[6] = 0;
 380         sr_cmd[7] = 0;
 381         sr_cmd[8] = 16;
 382         sr_cmd[9] = 0;
 383         
 384         buffer = (unsigned char*) scsi_malloc(512);
 385         if(!buffer) return -ENOMEM;
 386         
 387         result = do_ioctl(target, sr_cmd, buffer, 16);
 388         
 389         subchnl.cdsc_audiostatus = buffer[1];
 390         subchnl.cdsc_format = CDROM_MSF;
 391         subchnl.cdsc_ctrl = buffer[5] & 0xf;
 392         subchnl.cdsc_trk = buffer[6];
 393         subchnl.cdsc_ind = buffer[7];
 394         
 395         subchnl.cdsc_reladdr.msf.minute = buffer[13];
 396         subchnl.cdsc_reladdr.msf.second = buffer[14];
 397         subchnl.cdsc_reladdr.msf.frame = buffer[15];
 398         subchnl.cdsc_absaddr.msf.minute = buffer[9];
 399         subchnl.cdsc_absaddr.msf.second = buffer[10];
 400         subchnl.cdsc_absaddr.msf.frame = buffer[11];
 401         
 402         scsi_free(buffer, 512);
 403         
 404         err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_subchnl));
 405         if (err)
 406             return err;
 407         memcpy_tofs ((void *) arg, &subchnl, sizeof (struct cdrom_subchnl));
 408         return result;
 409     }
 410         
 411     case CDROMREADMODE2:
 412         return -EINVAL;
 413     case CDROMREADMODE1:
 414         return -EINVAL;
 415         
 416         /* block-copy from ../block/sbpcd.c with some adjustments... */
 417     case CDROMMULTISESSION: /* tell start-of-last-session to user */
 418     {
 419         struct cdrom_multisession  ms_info;
 420         long                       lba;
 421         
 422         err = verify_area(VERIFY_READ, (void *) arg,
 423                           sizeof(struct cdrom_multisession));
 424         if (err) return (err);
 425         
 426         memcpy_fromfs(&ms_info, (void *) arg, sizeof(struct cdrom_multisession));
 427         
 428         if (ms_info.addr_format==CDROM_MSF) { /* MSF-bin requested */
 429             lba = scsi_CDs[target].mpcd_sector+CD_BLOCK_OFFSET;
 430             ms_info.addr.msf.minute = lba / (CD_SECS*CD_FRAMES);
 431             lba %= CD_SECS*CD_FRAMES;
 432             ms_info.addr.msf.second = lba / CD_FRAMES;
 433             ms_info.addr.msf.frame  = lba % CD_FRAMES;
 434         } else if (ms_info.addr_format==CDROM_LBA) /* lba requested */
 435             ms_info.addr.lba=scsi_CDs[target].mpcd_sector;
 436         else return (-EINVAL);
 437         
 438         ms_info.xa_flag=scsi_CDs[target].xa_flags & 0x01;
 439         
 440         err=verify_area(VERIFY_WRITE,(void *) arg,
 441                         sizeof(struct cdrom_multisession));
 442         if (err) return (err);
 443         
 444         memcpy_tofs((void *) arg, &ms_info, sizeof(struct cdrom_multisession));
 445         return (0);
 446     }
 447         
 448     case BLKRASET:
 449         if(!suser())  return -EACCES;
 450         if(!inode->i_rdev) return -EINVAL;
 451         if(arg > 0xff) return -EINVAL;
 452         read_ahead[MAJOR(inode->i_rdev)] = arg;
 453         return 0;
 454         RO_IOCTLS(dev,arg);
 455     default:
 456         return scsi_ioctl(scsi_CDs[target].device,cmd,(void *) arg);
 457     }
 458 }
 459 
 460 /*
 461  * Overrides for Emacs so that we follow Linus's tabbing style.
 462  * Emacs will notice this stuff at the end of the file and automatically
 463  * adjust the settings for this buffer only.  This must remain at the end
 464  * of the file.
 465  * ---------------------------------------------------------------------------
 466  * Local variables:
 467  * c-indent-level: 4
 468  * c-brace-imaginary-offset: 0
 469  * c-brace-offset: -4
 470  * c-argdecl-indent: 4
 471  * c-label-offset: -4
 472  * c-continued-statement-offset: 4
 473  * c-continued-brace-offset: 0
 474  * indent-tabs-mode: nil
 475  * tab-width: 8
 476  * End:
 477  */

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