drivers/scsi/sr

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

DEFINITIONS
