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 #include <linux/kernel.h>
   2 #include <linux/sched.h>
   3 #include <linux/mm.h>
   4 #include <linux/fs.h>
   5 #include <asm/segment.h>
   6 #include <linux/errno.h>
   7 
   8 #include "../block/blk.h"
   9 #include "scsi.h"
  10 #include "hosts.h"
  11 #include "sr.h"
  12 #include "scsi_ioctl.h"
  13 
  14 #include <linux/cdrom.h>
  15 
  16 #define IOCTL_RETRIES 3
  17 /* The CDROM is fairly slow, so we need a little extra time */
  18 #define IOCTL_TIMEOUT 2000
  19 
  20 extern int scsi_ioctl (Scsi_Device *dev, int cmd, void *arg);
  21 
  22 static void sr_ioctl_done(Scsi_Cmnd * SCpnt)
     /* [previous][next][first][last][top][bottom][index][help] */
  23 {
  24   struct request * req;
  25   
  26   req = &SCpnt->request;
  27   req->dev = 0xfffe; /* Busy, but indicate request done */
  28   
  29   if (req->sem != NULL) {
  30     up(req->sem);
  31   }
  32 }
  33 
  34 /* We do our own retries because we want to know what the specific
  35    error code is.  Normally the UNIT_ATTENTION code will automatically
  36    clear after one error */
  37 
  38 static int do_ioctl(int target, unsigned char * sr_cmd, void * buffer, unsigned buflength)
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  39 {
  40         Scsi_Cmnd * SCpnt;
  41         int result;
  42 
  43         SCpnt = allocate_device(NULL, scsi_CDs[target].device, 1);
  44         scsi_do_cmd(SCpnt,
  45                     (void *) sr_cmd, buffer, buflength, sr_ioctl_done, 
  46                     IOCTL_TIMEOUT, IOCTL_RETRIES);
  47 
  48 
  49         if (SCpnt->request.dev != 0xfffe){
  50           struct semaphore sem = MUTEX_LOCKED;
  51           SCpnt->request.sem = &sem;
  52           down(&sem);
  53           /* Hmm.. Have to ask about this */
  54           while (SCpnt->request.dev != 0xfffe) schedule();
  55         };
  56 
  57         result = SCpnt->result;
  58 
  59 /* Minimal error checking.  Ignore cases we know about, and report the rest. */
  60         if(driver_byte(result) != 0)
  61           switch(SCpnt->sense_buffer[2] & 0xf) {
  62           case UNIT_ATTENTION:
  63             scsi_CDs[target].device->changed = 1;
  64             printk("Disc change detected.\n");
  65             break;
  66           case NOT_READY: /* This happens if there is no disc in drive */
  67             printk("CDROM not ready.  Make sure there is a disc in the drive.\n");
  68             break;
  69           case ILLEGAL_REQUEST:
  70             printk("CDROM (ioctl) reports ILLEGAL REQUEST.\n");
  71             break;
  72           default:
  73             printk("SCSI CD error: host %d id %d lun %d return code = %03x\n", 
  74                    scsi_CDs[target].device->host->host_no, 
  75                    scsi_CDs[target].device->id,
  76                    scsi_CDs[target].device->lun,
  77                    result);
  78             printk("\tSense class %x, sense error %x, extended sense %x\n",
  79                    sense_class(SCpnt->sense_buffer[0]), 
  80                    sense_error(SCpnt->sense_buffer[0]),
  81                    SCpnt->sense_buffer[2] & 0xf);
  82             
  83         };
  84 
  85         result = SCpnt->result;
  86         SCpnt->request.dev = -1; /* Deallocate */
  87         wake_up(&SCpnt->device->device_wait);
  88         /* Wake up a process waiting for device*/
  89         return result;
  90 }
  91 
  92 int sr_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg)
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  93 {
  94         u_char  sr_cmd[10];
  95 
  96         int dev = inode->i_rdev;
  97         int result, target, err;
  98 
  99         target = MINOR(dev);
 100 
 101         if (target >= sr_template.nr_dev ||
 102             !scsi_CDs[target].device) return -ENXIO;
 103 
 104         switch (cmd) 
 105                 {
 106                 /* Sun-compatible */
 107                 case CDROMPAUSE:
 108 
 109                         sr_cmd[0] = SCMD_PAUSE_RESUME;
 110                         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 111                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = 0;
 112                         sr_cmd[5] = sr_cmd[6] = sr_cmd[7] = 0;
 113                         sr_cmd[8] = 0;
 114                         sr_cmd[9] = 0;
 115 
 116                         result = do_ioctl(target, sr_cmd, NULL, 255);
 117                         return result;
 118 
 119                 case CDROMRESUME:
 120 
 121                         sr_cmd[0] = SCMD_PAUSE_RESUME;
 122                         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 123                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = 0;
 124                         sr_cmd[5] = sr_cmd[6] = sr_cmd[7] = 0;
 125                         sr_cmd[8] = 1;
 126                         sr_cmd[9] = 0;
 127 
 128                         result = do_ioctl(target, sr_cmd, NULL, 255);
 129 
 130                         return result;
 131 
 132                 case CDROMPLAYMSF:
 133                         {
 134                         struct cdrom_msf msf;
 135                         memcpy_fromfs(&msf, (void *) arg, sizeof(msf));
 136 
 137                         sr_cmd[0] = SCMD_PLAYAUDIO_MSF;
 138                         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 139                         sr_cmd[2] = 0;
 140                         sr_cmd[3] = msf.cdmsf_min0;
 141                         sr_cmd[4] = msf.cdmsf_sec0;
 142                         sr_cmd[5] = msf.cdmsf_frame0;
 143                         sr_cmd[6] = msf.cdmsf_min1;
 144                         sr_cmd[7] = msf.cdmsf_sec1;
 145                         sr_cmd[8] = msf.cdmsf_frame1;
 146                         sr_cmd[9] = 0;
 147 
 148                         result = do_ioctl(target, sr_cmd, NULL, 255);
 149                         return result;
 150                         }
 151 
 152                 case CDROMPLAYTRKIND:
 153                         {
 154                         struct cdrom_ti ti;
 155                         memcpy_fromfs(&ti, (void *) arg, sizeof(ti));
 156 
 157                         sr_cmd[0] = SCMD_PLAYAUDIO_TI;
 158                         sr_cmd[1] = scsi_CDs[target].device->lun << 5;
 159                         sr_cmd[2] = 0;
 160                         sr_cmd[3] = 0;
 161                         sr_cmd[4] = ti.cdti_trk0;
 162                         sr_cmd[5] = ti.cdti_ind0;
 163                         sr_cmd[6] = 0;
 164                         sr_cmd[7] = ti.cdti_trk1;
 165                         sr_cmd[8] = ti.cdti_ind1;
 166                         sr_cmd[9] = 0;
 167 
 168                         result = do_ioctl(target, sr_cmd, NULL, 255);
 169 
 170                         return result;
 171                         }
 172 
 173                 case CDROMREADTOCHDR:
 174                         {
 175                         struct cdrom_tochdr tochdr;
 176                         char * buffer;
 177 
 178                         sr_cmd[0] = SCMD_READ_TOC;
 179                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 180                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 181                         sr_cmd[6] = 0;
 182                         sr_cmd[7] = 0;              /* MSB of length (12) */
 183                         sr_cmd[8] = 12;             /* LSB of length */
 184                         sr_cmd[9] = 0;
 185 
 186                         buffer = (unsigned char *) scsi_malloc(512);
 187                         if(!buffer) return -ENOMEM;
 188 
 189                         result = do_ioctl(target, sr_cmd, buffer, 12);
 190 
 191                         tochdr.cdth_trk0 = buffer[2];
 192                         tochdr.cdth_trk1 = buffer[3];
 193 
 194                         scsi_free(buffer, 512);
 195 
 196                         err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_tochdr));
 197                         if (err)
 198                                 return err;
 199                         memcpy_tofs ((void *) arg, &tochdr, sizeof (struct cdrom_tochdr));
 200                         
 201                         return result;
 202                         }
 203 
 204                 case CDROMREADTOCENTRY:
 205                         {
 206                         struct cdrom_tocentry tocentry;
 207                         char * buffer;
 208 
 209                         verify_area (VERIFY_READ, (void *) arg, sizeof (struct cdrom_tocentry));
 210                         memcpy_fromfs (&tocentry, (void *) arg, sizeof (struct cdrom_tocentry));
 211 
 212                         sr_cmd[0] = SCMD_READ_TOC;
 213                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 214                         sr_cmd[2] = sr_cmd[3] = sr_cmd[4] = sr_cmd[5] = 0;
 215                         sr_cmd[6] = tocentry.cdte_track;
 216                         sr_cmd[7] = 0;             /* MSB of length (12)  */
 217                         sr_cmd[8] = 12;            /* LSB of length */
 218                         sr_cmd[9] = 0;
 219 
 220                         buffer = (unsigned char *) scsi_malloc(512);
 221                         if(!buffer) return -ENOMEM;
 222 
 223                         result = do_ioctl (target, sr_cmd, buffer, 12);
 224 
 225                         if (tocentry.cdte_format == CDROM_MSF) {
 226                           tocentry.cdte_addr.msf.minute = buffer[9];
 227                           tocentry.cdte_addr.msf.second = buffer[10];
 228                           tocentry.cdte_addr.msf.frame = buffer[11];
 229                           tocentry.cdte_ctrl = buffer[5] & 0xf;
 230                         }
 231                         else
 232                           tocentry.cdte_addr.lba = (int) buffer[0];
 233 
 234                         scsi_free(buffer, 512);
 235 
 236                         err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_tocentry));
 237                         if (err)
 238                                 return err;
 239                         memcpy_tofs ((void *) arg, &tocentry, sizeof (struct cdrom_tocentry));
 240 
 241                         return result;
 242                         }
 243 
 244                 case CDROMSTOP:
 245                         sr_cmd[0] = START_STOP;
 246                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 1;
 247                         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 248                         sr_cmd[4] = 0;
 249 
 250                         result = do_ioctl(target, sr_cmd, NULL, 255);
 251                         return result;
 252                         
 253                 case CDROMSTART:
 254                         sr_cmd[0] = START_STOP;
 255                         sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 1;
 256                         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 257                         sr_cmd[4] = 1;
 258 
 259                         result = do_ioctl(target, sr_cmd, NULL, 255);
 260                         return result;
 261 
 262                 case CDROMEJECT:
 263                         if (scsi_CDs[target].device -> access_count == 1)
 264                           sr_ioctl (inode, NULL, SCSI_IOCTL_DOORUNLOCK, 0);
 265 
 266                         sr_cmd[0] = START_STOP;
 267                         sr_cmd[1] = ((scsi_CDs[target].device -> lun) << 5) | 1;
 268                         sr_cmd[2] = sr_cmd[3] = sr_cmd[5] = 0;
 269                         sr_cmd[4] = 0x02;
 270 
 271                         if (!(result = do_ioctl(target, sr_cmd, NULL, 255)))
 272                           scsi_CDs[target].device -> changed = 1;
 273 
 274                         return result;
 275 
 276                 case CDROMVOLCTRL:
 277                         {
 278                           char * buffer, * mask;
 279                           struct cdrom_volctrl volctrl;
 280 
 281                           verify_area (VERIFY_READ, (void *) arg, sizeof (struct cdrom_volctrl));
 282                           memcpy_fromfs (&volctrl, (void *) arg, sizeof (struct cdrom_volctrl));
 283 
 284                           /* First we get the current params so we can just twiddle the volume */
 285 
 286                           sr_cmd[0] = MODE_SENSE;
 287                           sr_cmd[1] = (scsi_CDs[target].device -> lun) << 5;
 288                           sr_cmd[2] = 0xe;    /* Want mode page 0xe, CDROM audio params */
 289                           sr_cmd[3] = 0;
 290                           sr_cmd[4] = 28;
 291                           sr_cmd[5] = 0;
 292 
 293                           buffer = (unsigned char *) scsi_malloc(512);
 294                           if(!buffer) return -ENOMEM;
 295 
 296                           if ((result = do_ioctl (target, sr_cmd, buffer, 28))) {
 297                             printk ("Hosed while obtaining audio mode page\n");
 298                             scsi_free(buffer, 512);
 299                             return result;
 300                           }
 301 
 302                           sr_cmd[0] = MODE_SENSE;
 303                           sr_cmd[1] = (scsi_CDs[target].device -> lun) << 5;
 304                           sr_cmd[2] = 0x4e;   /* Want the mask for mode page 0xe */
 305                           sr_cmd[3] = 0;
 306                           sr_cmd[4] = 28;
 307                           sr_cmd[5] = 0;
 308 
 309                           mask = (unsigned char *) scsi_malloc(512);
 310                           if(!mask) {
 311                             scsi_free(buffer, 512);
 312                             return -ENOMEM;
 313                           };
 314 
 315                           if ((result = do_ioctl (target, sr_cmd, mask, 28))) {
 316                             printk ("Hosed while obtaining mask for audio mode page\n");
 317                             scsi_free(buffer, 512);
 318                             scsi_free(mask, 512);
 319                             return result;
 320                           }
 321 
 322                           /* Now mask and substitute our own volume and reuse the rest */
 323                           buffer[0] = 0;  /* Clear reserved field */
 324 
 325                           buffer[21] = volctrl.channel0 & mask[21];
 326                           buffer[23] = volctrl.channel1 & mask[23];
 327                           buffer[25] = volctrl.channel2 & mask[25];
 328                           buffer[27] = volctrl.channel3 & mask[27];
 329 
 330                           sr_cmd[0] = MODE_SELECT;
 331                           sr_cmd[1] = ((scsi_CDs[target].device -> lun) << 5) | 0x10;    /* Params are SCSI-2 */
 332                           sr_cmd[2] = sr_cmd[3] = 0;
 333                           sr_cmd[4] = 28;
 334                           sr_cmd[5] = 0;
 335 
 336                           result = do_ioctl (target, sr_cmd, buffer, 28);
 337                           scsi_free(buffer, 512);
 338                           scsi_free(mask, 512);
 339                           return result;
 340                         }
 341 
 342                 case CDROMSUBCHNL:
 343                         {
 344                           struct cdrom_subchnl subchnl;
 345                           char * buffer;
 346                           
 347                           sr_cmd[0] = SCMD_READ_SUBCHANNEL;
 348                           sr_cmd[1] = ((scsi_CDs[target].device->lun) << 5) | 0x02;    /* MSF format */
 349                           sr_cmd[2] = 0x40;    /* I do want the subchannel info */
 350                           sr_cmd[3] = 0x01;    /* Give me current position info */
 351                           sr_cmd[4] = sr_cmd[5] = 0;
 352                           sr_cmd[6] = 0;
 353                           sr_cmd[7] = 0;
 354                           sr_cmd[8] = 16;
 355                           sr_cmd[9] = 0;
 356 
 357                           buffer = (unsigned char*) scsi_malloc(512);
 358                           if(!buffer) return -ENOMEM;
 359 
 360                           result = do_ioctl(target, sr_cmd, buffer, 16);
 361 
 362                           subchnl.cdsc_audiostatus = buffer[1];
 363                           subchnl.cdsc_format = CDROM_MSF;
 364                           subchnl.cdsc_ctrl = buffer[5] & 0xf;
 365                           subchnl.cdsc_trk = buffer[6];
 366                           subchnl.cdsc_ind = buffer[7];
 367 
 368                           subchnl.cdsc_reladdr.msf.minute = buffer[13];
 369                           subchnl.cdsc_reladdr.msf.second = buffer[14];
 370                           subchnl.cdsc_reladdr.msf.frame = buffer[15];
 371                           subchnl.cdsc_absaddr.msf.minute = buffer[9];
 372                           subchnl.cdsc_absaddr.msf.second = buffer[10];
 373                           subchnl.cdsc_absaddr.msf.frame = buffer[11];
 374 
 375                           scsi_free(buffer, 512);
 376 
 377                           err = verify_area (VERIFY_WRITE, (void *) arg, sizeof (struct cdrom_subchnl));
 378                           if (err)
 379                                   return err;
 380                           memcpy_tofs ((void *) arg, &subchnl, sizeof (struct cdrom_subchnl));
 381                           return result;
 382                         }
 383 
 384                 case CDROMREADMODE2:
 385                         return -EINVAL;
 386                 case CDROMREADMODE1:
 387                         return -EINVAL;
 388                         
 389                 /* block-copy from ../block/sbpcd.c with some adjustments... */
 390                 case CDROMMULTISESSION: /* tell start-of-last-session to user */
 391                         {
 392                           struct cdrom_multisession  ms_info;
 393                           long                       lba;
 394                           
 395                           err = verify_area(VERIFY_READ, (void *) arg,
 396                                             sizeof(struct cdrom_multisession));
 397                           if (err) return (err);
 398                         
 399                           memcpy_fromfs(&ms_info, (void *) arg, sizeof(struct cdrom_multisession));
 400 
 401                           if (ms_info.addr_format==CDROM_MSF) { /* MSF-bin requested */
 402                             lba = scsi_CDs[target].mpcd_sector+CD_BLOCK_OFFSET;
 403                             ms_info.addr.msf.minute = lba / (CD_SECS*CD_FRAMES);
 404                             lba %= CD_SECS*CD_FRAMES;
 405                             ms_info.addr.msf.second = lba / CD_FRAMES;
 406                             ms_info.addr.msf.frame  = lba % CD_FRAMES;
 407                           } else if (ms_info.addr_format==CDROM_LBA) /* lba requested */
 408                             ms_info.addr.lba=scsi_CDs[target].mpcd_sector;
 409                           else return (-EINVAL);
 410                         
 411                           ms_info.xa_flag=scsi_CDs[target].is_xa;
 412                                                   
 413                           err=verify_area(VERIFY_WRITE,(void *) arg,
 414                                           sizeof(struct cdrom_multisession));
 415                           if (err) return (err);
 416 
 417                           memcpy_tofs((void *) arg, &ms_info, sizeof(struct cdrom_multisession));
 418                           return (0);
 419                         }
 420 
 421                 case BLKRASET:
 422                         if(!suser())  return -EACCES;
 423                         if(!inode->i_rdev) return -EINVAL;
 424                         if(arg > 0xff) return -EINVAL;
 425                         read_ahead[MAJOR(inode->i_rdev)] = arg;
 426                         return 0;
 427                 RO_IOCTLS(dev,arg);
 428                 default:
 429                         return scsi_ioctl(scsi_CDs[target].device,cmd,(void *) arg);
 430                 }
 431 }

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