drivers/scsi/gdth_proc.c

   1 /* gdth_proc.c
   2  * $Id: gdth_proc.c,v 1.42 2004/03/05 15:50:20 achim Exp $
   3  */
   4
   5 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,7)
   6 #include <linux/completion.h>
   7 #endif
   8
   9 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
  10 int gdth_proc_info(struct Scsi_Host *host, char *buffer,char **start,off_t offset,int length,
  11                    int inout)
  12 {
  13     int hanum,busnum;
  14
  15     TRACE2(("gdth_proc_info() length %d offs %d inout %d\n",
  16             length,(int)offset,inout));
  17
  18     hanum = NUMDATA(host)->hanum;
  19     busnum= NUMDATA(host)->busnum;
  20
  21     if (inout)
  22         return(gdth_set_info(buffer,length,host,hanum,busnum));
  23     else
  24         return(gdth_get_info(buffer,start,offset,length,host,hanum,busnum));
  25 }
  26 #else
  27 int gdth_proc_info(char *buffer,char **start,off_t offset,int length,int hostno,
  28                    int inout)
  29 {
  30     int hanum,busnum,i;
  31
  32     TRACE2(("gdth_proc_info() length %d offs %d inout %d\n",
  33             length,(int)offset,inout));
  34
  35     for (i = 0; i < gdth_ctr_vcount; ++i) {
  36         if (gdth_ctr_vtab[i]->host_no == hostno)
  37             break;
  38     }
  39     if (i == gdth_ctr_vcount)
  40         return(-EINVAL);
  41
  42     hanum = NUMDATA(gdth_ctr_vtab[i])->hanum;
  43     busnum= NUMDATA(gdth_ctr_vtab[i])->busnum;
  44
  45     if (inout)
  46         return(gdth_set_info(buffer,length,gdth_ctr_vtab[i],hanum,busnum));
  47     else
  48         return(gdth_get_info(buffer,start,offset,length,
  49                              gdth_ctr_vtab[i],hanum,busnum));
  50 }
  51 #endif
  52
  53 static int gdth_set_info(char *buffer,int length,struct Scsi_Host *host,
  54                          int hanum,int busnum)
  55 {
  56     int             ret_val = -EINVAL;
  57 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
  58     Scsi_Request    *scp;
  59     Scsi_Device     *sdev;
  60 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
  61     Scsi_Cmnd       *scp;
  62     Scsi_Device     *sdev;
  63 #else
  64     Scsi_Cmnd       scp;
  65     Scsi_Device     sdev;
  66 #endif
  67     TRACE2(("gdth_set_info() ha %d bus %d\n",hanum,busnum));
  68
  69 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
  70     sdev = scsi_get_host_dev(host);
  71     scp  = scsi_allocate_request(sdev, GFP_KERNEL);
  72     if (!scp)
  73         return -ENOMEM;
  74     scp->sr_cmd_len = 12;
  75     scp->sr_use_sg = 0;
  76 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
  77     sdev = scsi_get_host_dev(host);
  78     scp  = scsi_allocate_device(sdev, 1, FALSE);
  79     if (!scp)
  80         return -ENOMEM;
  81     scp->cmd_len = 12;
  82     scp->use_sg = 0;
  83 #else
  84     memset(&sdev,0,sizeof(Scsi_Device));
  85     memset(&scp, 0,sizeof(Scsi_Cmnd));
  86     sdev.host = scp.host = host;
  87     sdev.id = scp.target = sdev.host->this_id;
  88     scp.device = &sdev;
  89 #endif
  90
  91     if (length >= 4) {
  92         if (strncmp(buffer,"gdth",4) == 0) {
  93             buffer += 5;
  94             length -= 5;
  95             ret_val = gdth_set_asc_info( buffer, length, hanum, scp );
  96         }
  97     }
  98 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
  99     scsi_release_request(scp);
 100     scsi_free_host_dev(sdev);
 101 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 102     scsi_release_command(scp);
 103     scsi_free_host_dev(sdev);
 104 #endif
 105     return ret_val;
 106 }
 107
 108 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 109 static int gdth_set_asc_info(char *buffer,int length,int hanum,Scsi_Request *scp)
 110 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 111 static int gdth_set_asc_info(char *buffer,int length,int hanum,Scsi_Cmnd *scp)
 112 #else
 113 static int gdth_set_asc_info(char *buffer,int length,int hanum,Scsi_Cmnd scp)
 114 #endif
 115 {
 116     int             orig_length, drive, wb_mode;
 117     int             i, found;
 118     gdth_ha_str     *ha;
 119     gdth_cmd_str    gdtcmd;
 120     gdth_cpar_str   *pcpar;
 121     ulong64         paddr;
 122
 123     char            cmnd[MAX_COMMAND_SIZE];
 124     memset(cmnd, 0xff, 12);
 125     memset(&gdtcmd, 0, sizeof(gdth_cmd_str));
 126
 127     TRACE2(("gdth_set_asc_info() ha %d\n",hanum));
 128     ha = HADATA(gdth_ctr_tab[hanum]);
 129     orig_length = length + 5;
 130     drive = -1;
 131     wb_mode = 0;
 132     found = FALSE;
 133
 134     if (length >= 5 && strncmp(buffer,"flush",5)==0) {
 135         buffer += 6;
 136         length -= 6;
 137         if (length && *buffer>='0' && *buffer<='9') {
 138             drive = (int)(*buffer-'0');
 139             ++buffer; --length;
 140             if (length && *buffer>='0' && *buffer<='9') {
 141                 drive = drive*10 + (int)(*buffer-'0');
 142                 ++buffer; --length;
 143             }
 144             printk("GDT: Flushing host drive %d .. ",drive);
 145         } else {
 146             printk("GDT: Flushing all host drives .. ");
 147         }
 148         for (i = 0; i < MAX_HDRIVES; ++i) {
 149             if (ha->hdr[i].present) {
 150                 if (drive != -1 && i != drive)
 151                     continue;
 152                 found = TRUE;
 153                 gdtcmd.Service = CACHESERVICE;
 154                 gdtcmd.OpCode = GDT_FLUSH;
 155                 if (ha->cache_feat & GDT_64BIT) {
 156                     gdtcmd.u.cache64.DeviceNo = i;
 157                     gdtcmd.u.cache64.BlockNo = 1;
 158                 } else {
 159                     gdtcmd.u.cache.DeviceNo = i;
 160                     gdtcmd.u.cache.BlockNo = 1;
 161                 }
 162 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 163                 gdth_do_req(scp, &gdtcmd, cmnd, 30);
 164 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 165                 gdth_do_cmd(scp, &gdtcmd, cmnd, 30);
 166 #else
 167                 gdth_do_cmd(&scp, &gdtcmd, cmnd, 30);
 168 #endif
 169             }
 170         }
 171         if (!found)
 172             printk("\nNo host drive found !\n");
 173         else
 174             printk("Done.\n");
 175         return(orig_length);
 176     }
 177
 178     if (length >= 7 && strncmp(buffer,"wbp_off",7)==0) {
 179         buffer += 8;
 180         length -= 8;
 181         printk("GDT: Disabling write back permanently .. ");
 182         wb_mode = 1;
 183     } else if (length >= 6 && strncmp(buffer,"wbp_on",6)==0) {
 184         buffer += 7;
 185         length -= 7;
 186         printk("GDT: Enabling write back permanently .. ");
 187         wb_mode = 2;
 188     } else if (length >= 6 && strncmp(buffer,"wb_off",6)==0) {
 189         buffer += 7;
 190         length -= 7;
 191         printk("GDT: Disabling write back commands .. ");
 192         if (ha->cache_feat & GDT_WR_THROUGH) {
 193             gdth_write_through = TRUE;
 194             printk("Done.\n");
 195         } else {
 196             printk("Not supported !\n");
 197         }
 198         return(orig_length);
 199     } else if (length >= 5 && strncmp(buffer,"wb_on",5)==0) {
 200         buffer += 6;
 201         length -= 6;
 202         printk("GDT: Enabling write back commands .. ");
 203         gdth_write_through = FALSE;
 204         printk("Done.\n");
 205         return(orig_length);
 206     }
 207
 208     if (wb_mode) {
 209         if (!gdth_ioctl_alloc(hanum, sizeof(gdth_cpar_str), TRUE, &paddr))
 210             return(-EBUSY);
 211         pcpar = (gdth_cpar_str *)ha->pscratch;
 212         memcpy( pcpar, &ha->cpar, sizeof(gdth_cpar_str) );
 213         gdtcmd.Service = CACHESERVICE;
 214         gdtcmd.OpCode = GDT_IOCTL;
 215         gdtcmd.u.ioctl.p_param = paddr;
 216         gdtcmd.u.ioctl.param_size = sizeof(gdth_cpar_str);
 217         gdtcmd.u.ioctl.subfunc = CACHE_CONFIG;
 218         gdtcmd.u.ioctl.channel = INVALID_CHANNEL;
 219         pcpar->write_back = wb_mode==1 ? 0:1;
 220 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 221         gdth_do_req(scp, &gdtcmd, cmnd, 30);
 222 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 223         gdth_do_cmd(scp, &gdtcmd, cmnd, 30);
 224 #else
 225         gdth_do_cmd(&scp, &gdtcmd, cmnd, 30);
 226 #endif
 227         gdth_ioctl_free(hanum, GDTH_SCRATCH, ha->pscratch, paddr);
 228         printk("Done.\n");
 229         return(orig_length);
 230     }
 231
 232     printk("GDT: Unknown command: %s  Length: %d\n",buffer,length);
 233     return(-EINVAL);
 234 }
 235
 236 static int gdth_get_info(char *buffer,char **start,off_t offset,int length,
 237                          struct Scsi_Host *host,int hanum,int busnum)
 238 {
 239     int size = 0,len = 0;
 240     off_t begin = 0,pos = 0;
 241     gdth_ha_str *ha;
 242     int id, i, j, k, sec, flag;
 243     int no_mdrv = 0, drv_no, is_mirr;
 244     ulong32 cnt;
 245     ulong64 paddr;
 246
 247     gdth_cmd_str gdtcmd;
 248     gdth_evt_str estr;
 249 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 250     Scsi_Request *scp;
 251     Scsi_Device *sdev;
 252 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 253     Scsi_Cmnd *scp;
 254     Scsi_Device *sdev;
 255 #else
 256     Scsi_Cmnd scp;
 257     Scsi_Device sdev;
 258 #endif
 259     char hrec[161];
 260     struct timeval tv;
 261
 262     char *buf;
 263     gdth_dskstat_str *pds;
 264     gdth_diskinfo_str *pdi;
 265     gdth_arrayinf_str *pai;
 266     gdth_defcnt_str *pdef;
 267     gdth_cdrinfo_str *pcdi;
 268     gdth_hget_str *phg;
 269
 270     char cmnd[MAX_COMMAND_SIZE];
 271     memset(cmnd, 0xff, 12);
 272     memset(&gdtcmd, 0, sizeof(gdth_cmd_str));
 273
 274     TRACE2(("gdth_get_info() ha %d bus %d\n",hanum,busnum));
 275     ha = HADATA(gdth_ctr_tab[hanum]);
 276
 277 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 278     sdev = scsi_get_host_dev(host);
 279     scp  = scsi_allocate_request(sdev, GFP_KERNEL);
 280     if (!scp)
 281         return -ENOMEM;
 282     scp->sr_cmd_len = 12;
 283     scp->sr_use_sg = 0;
 284 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 285     sdev = scsi_get_host_dev(host);
 286     scp  = scsi_allocate_device(sdev, 1, FALSE);
 287     if (!scp)
 288         return -ENOMEM;
 289     scp->cmd_len = 12;
 290     scp->use_sg = 0;
 291 #else
 292     memset(&sdev,0,sizeof(Scsi_Device));
 293     memset(&scp, 0,sizeof(Scsi_Cmnd));
 294     sdev.host = scp.host = host;
 295     sdev.id = scp.target = sdev.host->this_id;
 296     scp.device = &sdev;
 297 #endif
 298
 299
 300     /* request is i.e. "cat /proc/scsi/gdth/0" */
 301     /* format: %-15s\t%-10s\t%-15s\t%s */
 302     /* driver parameters */
 303     size = sprintf(buffer+len,"Driver Parameters:\n");
 304     len += size;  pos = begin + len;
 305     if (reserve_list[0] == 0xff)
 306         strcpy(hrec, "--");
 307     else {
 308         sprintf(hrec, "%d", reserve_list[0]);
 309         for (i = 1;  i < MAX_RES_ARGS; i++) {
 310             if (reserve_list[i] == 0xff)
 311                 break;
 312             sprintf(hrec,"%s,%d", hrec, reserve_list[i]);
 313         }
 314     }
 315     size = sprintf(buffer+len,
 316                    " reserve_mode: \t%d         \treserve_list:  \t%s\n",
 317                    reserve_mode, hrec);
 318     len += size;  pos = begin + len;
 319     size = sprintf(buffer+len,
 320                    " max_ids:      \t%-3d       \thdr_channel:   \t%d\n",
 321                    max_ids, hdr_channel);
 322     len += size;  pos = begin + len;
 323
 324     /* controller information */
 325     size = sprintf(buffer+len,"\nDisk Array Controller Information:\n");
 326     len += size;  pos = begin + len;
 327     if (virt_ctr)
 328         sprintf(hrec, "%s (Bus %d)", ha->binfo.type_string, busnum);
 329     else
 330         strcpy(hrec, ha->binfo.type_string);
 331     size = sprintf(buffer+len,
 332                    " Number:       \t%d         \tName:          \t%s\n",
 333                    hanum, hrec);
 334     len += size;  pos = begin + len;
 335
 336     if (ha->more_proc)
 337         sprintf(hrec, "%d.%02d.%02d-%c%03X",
 338                 (unchar)(ha->binfo.upd_fw_ver>>24),
 339                 (unchar)(ha->binfo.upd_fw_ver>>16),
 340                 (unchar)(ha->binfo.upd_fw_ver),
 341                 ha->bfeat.raid ? 'R':'N',
 342                 ha->binfo.upd_revision);
 343     else
 344         sprintf(hrec, "%d.%02d", (unchar)(ha->cpar.version>>8),
 345                 (unchar)(ha->cpar.version));
 346
 347     size = sprintf(buffer+len,
 348                    " Driver Ver.:  \t%-10s\tFirmware Ver.: \t%s\n",
 349                    GDTH_VERSION_STR, hrec);
 350     len += size;  pos = begin + len;
 351
 352     if (ha->more_proc) {
 353         /* more information: 1. about controller */
 354         size = sprintf(buffer+len,
 355                        " Serial No.:   \t0x%8X\tCache RAM size:\t%d KB\n",
 356                        ha->binfo.ser_no, ha->binfo.memsize / 1024);
 357         len += size;  pos = begin + len;
 358     }
 359
 360 #ifdef GDTH_DMA_STATISTICS
 361     /* controller statistics */
 362     size = sprintf(buffer+len,"\nController Statistics:\n");
 363     len += size;  pos = begin + len;
 364     size = sprintf(buffer+len,
 365                    " 32-bit DMA buffer:\t%lu\t64-bit DMA buffer:\t%lu\n",
 366                    ha->dma32_cnt, ha->dma64_cnt);
 367     len += size;  pos = begin + len;
 368 #endif
 369
 370     if (pos < offset) {
 371         len = 0;
 372         begin = pos;
 373     }
 374     if (pos > offset + length)
 375         goto stop_output;
 376
 377     if (ha->more_proc) {
 378         /* more information: 2. about physical devices */
 379         size = sprintf(buffer+len,"\nPhysical Devices:");
 380         len += size;  pos = begin + len;
 381         flag = FALSE;
 382
 383         buf = gdth_ioctl_alloc(hanum, GDTH_SCRATCH, FALSE, &paddr);
 384         if (!buf)
 385             goto stop_output;
 386         for (i = 0; i < ha->bus_cnt; ++i) {
 387             /* 2.a statistics (and retries/reassigns) */
 388             TRACE2(("pdr_statistics() chn %d\n",i));
 389             pds = (gdth_dskstat_str *)(buf + GDTH_SCRATCH/4);
 390             gdtcmd.Service = CACHESERVICE;
 391             gdtcmd.OpCode = GDT_IOCTL;
 392             gdtcmd.u.ioctl.p_param = paddr + GDTH_SCRATCH/4;
 393             gdtcmd.u.ioctl.param_size = 3*GDTH_SCRATCH/4;
 394             gdtcmd.u.ioctl.subfunc = DSK_STATISTICS | L_CTRL_PATTERN;
 395             gdtcmd.u.ioctl.channel = ha->raw[i].address | INVALID_CHANNEL;
 396             pds->bid = ha->raw[i].local_no;
 397             pds->first = 0;
 398             pds->entries = ha->raw[i].pdev_cnt;
 399             cnt = (3*GDTH_SCRATCH/4 - 5 * sizeof(ulong32)) /
 400                 sizeof(pds->list[0]);
 401             if (pds->entries > cnt)
 402                 pds->entries = cnt;
 403 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 404             gdth_do_req(scp, &gdtcmd, cmnd, 30);
 405             if (scp->sr_command->SCp.Status != S_OK)
 406 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 407             gdth_do_cmd(scp, &gdtcmd, cmnd, 30);
 408             if (scp->SCp.Status != S_OK)
 409 #else
 410             gdth_do_cmd(&scp, &gdtcmd, cmnd, 30);
 411             if (scp.SCp.Status != S_OK)
 412 #endif
 413             {
 414                 pds->count = 0;
 415             }
 416
 417             /* other IOCTLs must fit into area GDTH_SCRATCH/4 */
 418             for (j = 0; j < ha->raw[i].pdev_cnt; ++j) {
 419                 /* 2.b drive info */
 420                 TRACE2(("scsi_drv_info() chn %d dev %d\n",
 421                     i, ha->raw[i].id_list[j]));
 422                 pdi = (gdth_diskinfo_str *)buf;
 423                 gdtcmd.Service = CACHESERVICE;
 424                 gdtcmd.OpCode = GDT_IOCTL;
 425                 gdtcmd.u.ioctl.p_param = paddr;
 426                 gdtcmd.u.ioctl.param_size = sizeof(gdth_diskinfo_str);
 427                 gdtcmd.u.ioctl.subfunc = SCSI_DR_INFO | L_CTRL_PATTERN;
 428                 gdtcmd.u.ioctl.channel =
 429                     ha->raw[i].address | ha->raw[i].id_list[j];
 430 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 431                 gdth_do_req(scp, &gdtcmd, cmnd, 30);
 432                 if (scp->sr_command->SCp.Status == S_OK)
 433 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 434                 gdth_do_cmd(scp, &gdtcmd, cmnd, 30);
 435                 if (scp->SCp.Status == S_OK)
 436 #else
 437                 gdth_do_cmd(&scp, &gdtcmd, cmnd, 30);
 438                 if (scp.SCp.Status == S_OK)
 439 #endif
 440                 {
 441                     strncpy(hrec,pdi->vendor,8);
 442                     strncpy(hrec+8,pdi->product,16);
 443                     strncpy(hrec+24,pdi->revision,4);
 444                     hrec[28] = 0;
 445                     size = sprintf(buffer+len,
 446                                    "\n Chn/ID/LUN:   \t%c/%02d/%d    \tName:          \t%s\n",
 447                                    'A'+i,pdi->target_id,pdi->lun,hrec);
 448                     len += size;  pos = begin + len;
 449                     flag = TRUE;
 450                     pdi->no_ldrive &= 0xffff;
 451                     if (pdi->no_ldrive == 0xffff)
 452                         strcpy(hrec,"--");
 453                     else
 454                         sprintf(hrec,"%d",pdi->no_ldrive);
 455                     size = sprintf(buffer+len,
 456                                    " Capacity [MB]:\t%-6d    \tTo Log. Drive: \t%s\n",
 457                                    pdi->blkcnt/(1024*1024/pdi->blksize),
 458                                    hrec);
 459                     len += size;  pos = begin + len;
 460                 } else {
 461                     pdi->devtype = 0xff;
 462                 }
 463
 464                 if (pdi->devtype == 0) {
 465                     /* search retries/reassigns */
 466                     for (k = 0; k < pds->count; ++k) {
 467                         if (pds->list[k].tid == pdi->target_id &&
 468                             pds->list[k].lun == pdi->lun) {
 469                             size = sprintf(buffer+len,
 470                                            " Retries:      \t%-6d    \tReassigns:     \t%d\n",
 471                                            pds->list[k].retries,
 472                                            pds->list[k].reassigns);
 473                             len += size;  pos = begin + len;
 474                             break;
 475                         }
 476                     }
 477                     /* 2.c grown defects */
 478                     TRACE2(("scsi_drv_defcnt() chn %d dev %d\n",
 479                             i, ha->raw[i].id_list[j]));
 480                     pdef = (gdth_defcnt_str *)buf;
 481                     gdtcmd.Service = CACHESERVICE;
 482                     gdtcmd.OpCode = GDT_IOCTL;
 483                     gdtcmd.u.ioctl.p_param = paddr;
 484                     gdtcmd.u.ioctl.param_size = sizeof(gdth_defcnt_str);
 485                     gdtcmd.u.ioctl.subfunc = SCSI_DEF_CNT | L_CTRL_PATTERN;
 486                     gdtcmd.u.ioctl.channel =
 487                         ha->raw[i].address | ha->raw[i].id_list[j];
 488                     pdef->sddc_type = 0x08;
 489 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 490                     gdth_do_req(scp, &gdtcmd, cmnd, 30);
 491                     if (scp->sr_command->SCp.Status == S_OK)
 492 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 493                     gdth_do_cmd(scp, &gdtcmd, cmnd, 30);
 494                     if (scp->SCp.Status == S_OK)
 495 #else
 496                     gdth_do_cmd(&scp, &gdtcmd, cmnd, 30);
 497                     if (scp.SCp.Status == S_OK)
 498 #endif
 499                     {
 500                         size = sprintf(buffer+len,
 501                                        " Grown Defects:\t%d\n",
 502                                        pdef->sddc_cnt);
 503                         len += size;  pos = begin + len;
 504                     }
 505                 }
 506                 if (pos < offset) {
 507                     len = 0;
 508                     begin = pos;
 509                 }
 510                 if (pos > offset + length)
 511                     goto stop_output;
 512             }
 513         }
 514         gdth_ioctl_free(hanum, GDTH_SCRATCH, buf, paddr);
 515
 516         if (!flag) {
 517             size = sprintf(buffer+len, "\n --\n");
 518             len += size;  pos = begin + len;
 519         }
 520
 521         /* 3. about logical drives */
 522         size = sprintf(buffer+len,"\nLogical Drives:");
 523         len += size;  pos = begin + len;
 524         flag = FALSE;
 525
 526         buf = gdth_ioctl_alloc(hanum, GDTH_SCRATCH, FALSE, &paddr);
 527         if (!buf)
 528             goto stop_output;
 529         for (i = 0; i < MAX_LDRIVES; ++i) {
 530             if (!ha->hdr[i].is_logdrv)
 531                 continue;
 532             drv_no = i;
 533             j = k = 0;
 534             is_mirr = FALSE;
 535             do {
 536                 /* 3.a log. drive info */
 537                 TRACE2(("cache_drv_info() drive no %d\n",drv_no));
 538                 pcdi = (gdth_cdrinfo_str *)buf;
 539                 gdtcmd.Service = CACHESERVICE;
 540                 gdtcmd.OpCode = GDT_IOCTL;
 541                 gdtcmd.u.ioctl.p_param = paddr;
 542                 gdtcmd.u.ioctl.param_size = sizeof(gdth_cdrinfo_str);
 543                 gdtcmd.u.ioctl.subfunc = CACHE_DRV_INFO;
 544                 gdtcmd.u.ioctl.channel = drv_no;
 545 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 546                 gdth_do_req(scp, &gdtcmd, cmnd, 30);
 547                 if (scp->sr_command->SCp.Status != S_OK)
 548 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 549                 gdth_do_cmd(scp, &gdtcmd, cmnd, 30);
 550                 if (scp->SCp.Status != S_OK)
 551 #else
 552                 gdth_do_cmd(&scp, &gdtcmd, cmnd, 30);
 553                 if (scp.SCp.Status != S_OK)
 554 #endif
 555                 {
 556                     break;
 557                 }
 558                 pcdi->ld_dtype >>= 16;
 559                 j++;
 560                 if (pcdi->ld_dtype > 2) {
 561                     strcpy(hrec, "missing");
 562                 } else if (pcdi->ld_error & 1) {
 563                     strcpy(hrec, "fault");
 564                 } else if (pcdi->ld_error & 2) {
 565                     strcpy(hrec, "invalid");
 566                     k++; j--;
 567                 } else {
 568                     strcpy(hrec, "ok");
 569                 }
 570
 571                 if (drv_no == i) {
 572                     size = sprintf(buffer+len,
 573                                    "\n Number:       \t%-2d        \tStatus:        \t%s\n",
 574                                    drv_no, hrec);
 575                     len += size;  pos = begin + len;
 576                     flag = TRUE;
 577                     no_mdrv = pcdi->cd_ldcnt;
 578                     if (no_mdrv > 1 || pcdi->ld_slave != -1) {
 579                         is_mirr = TRUE;
 580                         strcpy(hrec, "RAID-1");
 581                     } else if (pcdi->ld_dtype == 0) {
 582                         strcpy(hrec, "Disk");
 583                     } else if (pcdi->ld_dtype == 1) {
 584                         strcpy(hrec, "RAID-0");
 585                     } else if (pcdi->ld_dtype == 2) {
 586                         strcpy(hrec, "Chain");
 587                     } else {
 588                         strcpy(hrec, "???");
 589                     }
 590                     size = sprintf(buffer+len,
 591                                    " Capacity [MB]:\t%-6d    \tType:          \t%s\n",
 592                                    pcdi->ld_blkcnt/(1024*1024/pcdi->ld_blksize),
 593                                    hrec);
 594                     len += size;  pos = begin + len;
 595                 } else {
 596                     size = sprintf(buffer+len,
 597                                    " Slave Number: \t%-2d        \tStatus:        \t%s\n",
 598                                    drv_no & 0x7fff, hrec);
 599                     len += size;  pos = begin + len;
 600                 }
 601                 drv_no = pcdi->ld_slave;
 602                 if (pos < offset) {
 603                     len = 0;
 604                     begin = pos;
 605                 }
 606                 if (pos > offset + length)
 607                     goto stop_output;
 608             } while (drv_no != -1);
 609
 610             if (is_mirr) {
 611                 size = sprintf(buffer+len,
 612                                " Missing Drv.: \t%-2d        \tInvalid Drv.:  \t%d\n",
 613                                no_mdrv - j - k, k);
 614                 len += size;  pos = begin + len;
 615             }
 616
 617             if (!ha->hdr[i].is_arraydrv)
 618                 strcpy(hrec, "--");
 619             else
 620                 sprintf(hrec, "%d", ha->hdr[i].master_no);
 621             size = sprintf(buffer+len,
 622                            " To Array Drv.:\t%s\n", hrec);
 623             len += size;  pos = begin + len;
 624             if (pos < offset) {
 625                 len = 0;
 626                 begin = pos;
 627             }
 628             if (pos > offset + length)
 629                 goto stop_output;
 630         }
 631         gdth_ioctl_free(hanum, GDTH_SCRATCH, buf, paddr);
 632
 633         if (!flag) {
 634             size = sprintf(buffer+len, "\n --\n");
 635             len += size;  pos = begin + len;
 636         }
 637
 638         /* 4. about array drives */
 639         size = sprintf(buffer+len,"\nArray Drives:");
 640         len += size;  pos = begin + len;
 641         flag = FALSE;
 642
 643         buf = gdth_ioctl_alloc(hanum, GDTH_SCRATCH, FALSE, &paddr);
 644         if (!buf)
 645             goto stop_output;
 646         for (i = 0; i < MAX_LDRIVES; ++i) {
 647             if (!(ha->hdr[i].is_arraydrv && ha->hdr[i].is_master))
 648                 continue;
 649             /* 4.a array drive info */
 650             TRACE2(("array_info() drive no %d\n",i));
 651             pai = (gdth_arrayinf_str *)buf;
 652             gdtcmd.Service = CACHESERVICE;
 653             gdtcmd.OpCode = GDT_IOCTL;
 654             gdtcmd.u.ioctl.p_param = paddr;
 655             gdtcmd.u.ioctl.param_size = sizeof(gdth_arrayinf_str);
 656             gdtcmd.u.ioctl.subfunc = ARRAY_INFO | LA_CTRL_PATTERN;
 657             gdtcmd.u.ioctl.channel = i;
 658 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 659             gdth_do_req(scp, &gdtcmd, cmnd, 30);
 660             if (scp->sr_command->SCp.Status == S_OK)
 661 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 662             gdth_do_cmd(scp, &gdtcmd, cmnd, 30);
 663             if (scp->SCp.Status == S_OK)
 664 #else
 665             gdth_do_cmd(&scp, &gdtcmd, cmnd, 30);
 666             if (scp.SCp.Status == S_OK)
 667 #endif
 668             {
 669                 if (pai->ai_state == 0)
 670                     strcpy(hrec, "idle");
 671                 else if (pai->ai_state == 2)
 672                     strcpy(hrec, "build");
 673                 else if (pai->ai_state == 4)
 674                     strcpy(hrec, "ready");
 675                 else if (pai->ai_state == 6)
 676                     strcpy(hrec, "fail");
 677                 else if (pai->ai_state == 8 || pai->ai_state == 10)
 678                     strcpy(hrec, "rebuild");
 679                 else
 680                     strcpy(hrec, "error");
 681                 if (pai->ai_ext_state & 0x10)
 682                     strcat(hrec, "/expand");
 683                 else if (pai->ai_ext_state & 0x1)
 684                     strcat(hrec, "/patch");
 685                 size = sprintf(buffer+len,
 686                                "\n Number:       \t%-2d        \tStatus:        \t%s\n",
 687                                i,hrec);
 688                 len += size;  pos = begin + len;
 689                 flag = TRUE;
 690
 691                 if (pai->ai_type == 0)
 692                     strcpy(hrec, "RAID-0");
 693                 else if (pai->ai_type == 4)
 694                     strcpy(hrec, "RAID-4");
 695                 else if (pai->ai_type == 5)
 696                     strcpy(hrec, "RAID-5");
 697                 else
 698                     strcpy(hrec, "RAID-10");
 699                 size = sprintf(buffer+len,
 700                                " Capacity [MB]:\t%-6d    \tType:          \t%s\n",
 701                                pai->ai_size/(1024*1024/pai->ai_secsize),
 702                                hrec);
 703                 len += size;  pos = begin + len;
 704                 if (pos < offset) {
 705                     len = 0;
 706                     begin = pos;
 707                 }
 708                 if (pos > offset + length)
 709                     goto stop_output;
 710             }
 711         }
 712         gdth_ioctl_free(hanum, GDTH_SCRATCH, buf, paddr);
 713
 714         if (!flag) {
 715             size = sprintf(buffer+len, "\n --\n");
 716             len += size;  pos = begin + len;
 717         }
 718
 719         /* 5. about host drives */
 720         size = sprintf(buffer+len,"\nHost Drives:");
 721         len += size;  pos = begin + len;
 722         flag = FALSE;
 723
 724         buf = gdth_ioctl_alloc(hanum, sizeof(gdth_hget_str), FALSE, &paddr);
 725         if (!buf)
 726             goto stop_output;
 727         for (i = 0; i < MAX_LDRIVES; ++i) {
 728             if (!ha->hdr[i].is_logdrv ||
 729                 (ha->hdr[i].is_arraydrv && !ha->hdr[i].is_master))
 730                 continue;
 731             /* 5.a get host drive list */
 732             TRACE2(("host_get() drv_no %d\n",i));
 733             phg = (gdth_hget_str *)buf;
 734             gdtcmd.Service = CACHESERVICE;
 735             gdtcmd.OpCode = GDT_IOCTL;
 736             gdtcmd.u.ioctl.p_param = paddr;
 737             gdtcmd.u.ioctl.param_size = sizeof(gdth_hget_str);
 738             gdtcmd.u.ioctl.subfunc = HOST_GET | LA_CTRL_PATTERN;
 739             gdtcmd.u.ioctl.channel = i;
 740             phg->entries = MAX_HDRIVES;
 741             phg->offset = GDTOFFSOF(gdth_hget_str, entry[0]);
 742 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 743             gdth_do_req(scp, &gdtcmd, cmnd, 30);
 744             if (scp->sr_command->SCp.Status != S_OK)
 745 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 746             gdth_do_cmd(scp, &gdtcmd, cmnd, 30);
 747             if (scp->SCp.Status != S_OK)
 748 #else
 749             gdth_do_cmd(&scp, &gdtcmd, cmnd, 30);
 750             if (scp.SCp.Status != S_OK)
 751 #endif
 752             {
 753                 ha->hdr[i].ldr_no = i;
 754                 ha->hdr[i].rw_attribs = 0;
 755                 ha->hdr[i].start_sec = 0;
 756             } else {
 757                 for (j = 0; j < phg->entries; ++j) {
 758                     k = phg->entry[j].host_drive;
 759                     if (k >= MAX_LDRIVES)
 760                         continue;
 761                     ha->hdr[k].ldr_no = phg->entry[j].log_drive;
 762                     ha->hdr[k].rw_attribs = phg->entry[j].rw_attribs;
 763                     ha->hdr[k].start_sec = phg->entry[j].start_sec;
 764                 }
 765             }
 766         }
 767         gdth_ioctl_free(hanum, sizeof(gdth_hget_str), buf, paddr);
 768
 769         for (i = 0; i < MAX_HDRIVES; ++i) {
 770             if (!(ha->hdr[i].present))
 771                 continue;
 772
 773             size = sprintf(buffer+len,
 774                            "\n Number:       \t%-2d        \tArr/Log. Drive:\t%d\n",
 775                            i, ha->hdr[i].ldr_no);
 776             len += size;  pos = begin + len;
 777             flag = TRUE;
 778
 779             size = sprintf(buffer+len,
 780                            " Capacity [MB]:\t%-6d    \tStart Sector:  \t%d\n",
 781                            (ulong32)(ha->hdr[i].size/2048), ha->hdr[i].start_sec);
 782             len += size;  pos = begin + len;
 783             if (pos < offset) {
 784                 len = 0;
 785                 begin = pos;
 786             }
 787             if (pos > offset + length)
 788                 goto stop_output;
 789         }
 790
 791         if (!flag) {
 792             size = sprintf(buffer+len, "\n --\n");
 793             len += size;  pos = begin + len;
 794         }
 795     }
 796
 797     /* controller events */
 798     size = sprintf(buffer+len,"\nController Events:\n");
 799     len += size;  pos = begin + len;
 800
 801     for (id = -1;;) {
 802         id = gdth_read_event(ha, id, &estr);
 803         if (estr.event_source == 0)
 804             break;
 805         if (estr.event_data.eu.driver.ionode == hanum &&
 806             estr.event_source == ES_ASYNC) {
 807             gdth_log_event(&estr.event_data, hrec);
 808             do_gettimeofday(&tv);
 809             sec = (int)(tv.tv_sec - estr.first_stamp);
 810             if (sec < 0) sec = 0;
 811             size = sprintf(buffer+len," date- %02d:%02d:%02d\t%s\n",
 812                            sec/3600, sec%3600/60, sec%60, hrec);
 813             len += size;  pos = begin + len;
 814             if (pos < offset) {
 815                 len = 0;
 816                 begin = pos;
 817             }
 818             if (pos > offset + length)
 819                 goto stop_output;
 820         }
 821         if (id == -1)
 822             break;
 823     }
 824
 825 stop_output:
 826 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 827     scsi_release_request(scp);
 828     scsi_free_host_dev(sdev);
 829 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 830     scsi_release_command(scp);
 831     scsi_free_host_dev(sdev);
 832 #endif
 833     *start = buffer +(offset-begin);
 834     len -= (offset-begin);
 835     if (len > length)
 836         len = length;
 837     TRACE2(("get_info() len %d pos %d begin %d offset %d length %d size %d\n",
 838             len,(int)pos,(int)begin,(int)offset,length,size));
 839     return(len);
 840 }
 841
 842
 843 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 844 static void gdth_do_req(Scsi_Request *scp, gdth_cmd_str *gdtcmd,
 845                         char *cmnd, int timeout)
 846 {
 847     unsigned bufflen;
 848     DECLARE_COMPLETION(wait);
 849
 850     TRACE2(("gdth_do_req()\n"));
 851     if (gdtcmd != NULL) {
 852         bufflen = sizeof(gdth_cmd_str);
 853     } else {
 854         bufflen = 0;
 855     }
 856     scp->sr_request->rq_status = RQ_SCSI_BUSY;
 857     scp->sr_request->waiting = &wait;
 858     scsi_do_req(scp, cmnd, gdtcmd, bufflen, gdth_scsi_done, timeout*HZ, 1);
 859     wait_for_completion(&wait);
 860 }
 861
 862 #else
 863 static void gdth_do_cmd(Scsi_Cmnd *scp, gdth_cmd_str *gdtcmd,
 864                         char *cmnd, int timeout)
 865 {
 866     unsigned bufflen;
 867 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,7)
 868     DECLARE_COMPLETION(wait);
 869 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 870     DECLARE_MUTEX_LOCKED(sem);
 871 #else
 872     struct semaphore sem = MUTEX_LOCKED;
 873 #endif
 874
 875     TRACE2(("gdth_do_cmd()\n"));
 876     if (gdtcmd != NULL) {
 877         scp->SCp.this_residual = IOCTL_PRI;
 878         bufflen = sizeof(gdth_cmd_str);
 879     } else {
 880         scp->SCp.this_residual = DEFAULT_PRI;
 881         bufflen = 0;
 882     }
 883 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,7)
 884     scp->request.rq_status = RQ_SCSI_BUSY;
 885     scp->request.waiting = &wait;
 886     scsi_do_cmd(scp, cmnd, gdtcmd, bufflen, gdth_scsi_done, timeout*HZ, 1);
 887     wait_for_completion(&wait);
 888 #else
 889     scp->request.sem = &sem;
 890 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 891     scsi_do_cmd(scp, cmnd, gdtcmd, bufflen, gdth_scsi_done, timeout*HZ, 1);
 892 #else
 893     spin_lock_irq(&io_request_lock);
 894     scsi_do_cmd(scp, cmnd, gdtcmd, bufflen, gdth_scsi_done, timeout*HZ, 1);
 895     spin_unlock_irq(&io_request_lock);
 896 #endif
 897     down(&sem);
 898 #endif
 899 }
 900 #endif
 901
 902 void gdth_scsi_done(Scsi_Cmnd *scp)
 903 {
 904     TRACE2(("gdth_scsi_done()\n"));
 905
 906 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
 907     scp->request->rq_status = RQ_SCSI_DONE;
 908     if (scp->request->waiting != NULL)
 909         complete(scp->request->waiting);
 910 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,7)
 911     scp->request.rq_status = RQ_SCSI_DONE;
 912     if (scp->request.waiting != NULL)
 913         complete(scp->request.waiting);
 914 #else
 915     scp->request.rq_status = RQ_SCSI_DONE;
 916     if (scp->request.sem != NULL)
 917         up(scp->request.sem);
 918 #endif
 919 }
 920
 921 static char *gdth_ioctl_alloc(int hanum, int size, int scratch,
 922                               ulong64 *paddr)
 923 {
 924     gdth_ha_str *ha;
 925     ulong flags;
 926     char *ret_val;
 927
 928     if (size == 0)
 929         return NULL;
 930
 931     ha = HADATA(gdth_ctr_tab[hanum]);
 932     GDTH_LOCK_HA(ha, flags);
 933
 934     if (!ha->scratch_busy && size <= GDTH_SCRATCH) {
 935         ha->scratch_busy = TRUE;
 936         ret_val = ha->pscratch;
 937         *paddr = ha->scratch_phys;
 938     } else if (scratch) {
 939         ret_val = NULL;
 940     } else {
 941 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 942         dma_addr_t dma_addr;
 943
 944         ret_val = pci_alloc_consistent(ha->pdev, size, &dma_addr);
 945         *paddr = dma_addr;
 946 #else
 947         ret_val = scsi_init_malloc(size, GFP_ATOMIC | GFP_DMA);
 948         if (ret_val)
 949             *paddr = virt_to_bus(ret_val);
 950 #endif
 951     }
 952
 953     GDTH_UNLOCK_HA(ha, flags);
 954     return ret_val;
 955 }
 956
 957 static void gdth_ioctl_free(int hanum, int size, char *buf, ulong64 paddr)
 958 {
 959     gdth_ha_str *ha;
 960     ulong flags;
 961
 962     ha = HADATA(gdth_ctr_tab[hanum]);
 963     GDTH_LOCK_HA(ha, flags);
 964
 965     if (buf == ha->pscratch) {
 966         ha->scratch_busy = FALSE;
 967     } else {
 968 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
 969         pci_free_consistent(ha->pdev, size, buf, paddr);
 970 #else
 971         scsi_init_free((void *)buf, size);
 972 #endif
 973     }
 974
 975     GDTH_UNLOCK_HA(ha, flags);
 976 }
 977
 978 #ifdef GDTH_IOCTL_PROC
 979 static int gdth_ioctl_check_bin(int hanum, ushort size)
 980 {
 981     gdth_ha_str *ha;
 982     ulong flags;
 983     int ret_val;
 984
 985     ha = HADATA(gdth_ctr_tab[hanum]);
 986     GDTH_LOCK_HA(ha, flags);
 987
 988     ret_val = FALSE;
 989     if (ha->scratch_busy) {
 990         if (((gdth_iord_str *)ha->pscratch)->size == (ulong32)size)
 991             ret_val = TRUE;
 992     }
 993     GDTH_UNLOCK_HA(ha, flags);
 994     return ret_val;
 995 }
 996 #endif
 997
 998 static void gdth_wait_completion(int hanum, int busnum, int id)
 999 {
1000     gdth_ha_str *ha;
1001     ulong flags;
1002     int i;
1003     Scsi_Cmnd *scp;
1004     unchar b, t;
1005
1006     ha = HADATA(gdth_ctr_tab[hanum]);
1007     GDTH_LOCK_HA(ha, flags);
1008
1009     for (i = 0; i < GDTH_MAXCMDS; ++i) {
1010         scp = ha->cmd_tab[i].cmnd;
1011 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
1012         b = virt_ctr ? NUMDATA(scp->device->host)->busnum : scp->device->channel;
1013         t = scp->device->id;
1014 #else
1015         b = virt_ctr ? NUMDATA(scp->host)->busnum : scp->channel;
1016         t = scp->target;
1017 #endif
1018         if (!SPECIAL_SCP(scp) && t == (unchar)id &&
1019             b == (unchar)busnum) {
1020             scp->SCp.have_data_in = 0;
1021             GDTH_UNLOCK_HA(ha, flags);
1022             while (!scp->SCp.have_data_in)
1023                 barrier();
1024 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
1025             GDTH_LOCK_SCSI_DONE(scp->device->host, flags);
1026             scp->scsi_done(scp);
1027             GDTH_UNLOCK_SCSI_DONE(scp->device->host, flags);
1028 #else
1029             GDTH_LOCK_SCSI_DONE(flags);
1030             scp->scsi_done(scp);
1031             GDTH_UNLOCK_SCSI_DONE(flags);
1032 #endif
1033         GDTH_LOCK_HA(ha, flags);
1034         }
1035     }
1036     GDTH_UNLOCK_HA(ha, flags);
1037 }
1038
1039 static void gdth_stop_timeout(int hanum, int busnum, int id)
1040 {
1041     gdth_ha_str *ha;
1042     ulong flags;
1043     Scsi_Cmnd *scp;
1044     unchar b, t;
1045
1046     ha = HADATA(gdth_ctr_tab[hanum]);
1047     GDTH_LOCK_HA(ha, flags);
1048
1049     for (scp = ha->req_first; scp; scp = (Scsi_Cmnd *)scp->SCp.ptr) {
1050 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
1051         b = virt_ctr ? NUMDATA(scp->device->host)->busnum : scp->device->channel;
1052         t = scp->device->id;
1053 #else
1054         b = virt_ctr ? NUMDATA(scp->host)->busnum : scp->channel;
1055         t = scp->target;
1056 #endif
1057         if (t == (unchar)id && b == (unchar)busnum) {
1058             TRACE2(("gdth_stop_timeout(): update_timeout()\n"));
1059             scp->SCp.buffers_residual = gdth_update_timeout(hanum, scp, 0);
1060         }
1061     }
1062     GDTH_UNLOCK_HA(ha, flags);
1063 }
1064
1065 static void gdth_start_timeout(int hanum, int busnum, int id)
1066 {
1067     gdth_ha_str *ha;
1068     ulong flags;
1069     Scsi_Cmnd *scp;
1070     unchar b, t;
1071
1072     ha = HADATA(gdth_ctr_tab[hanum]);
1073     GDTH_LOCK_HA(ha, flags);
1074
1075     for (scp = ha->req_first; scp; scp = (Scsi_Cmnd *)scp->SCp.ptr) {
1076 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
1077         b = virt_ctr ? NUMDATA(scp->device->host)->busnum : scp->device->channel;
1078         t = scp->device->id;
1079 #else
1080         b = virt_ctr ? NUMDATA(scp->host)->busnum : scp->channel;
1081         t = scp->target;
1082 #endif
1083         if (t == (unchar)id && b == (unchar)busnum) {
1084             TRACE2(("gdth_start_timeout(): update_timeout()\n"));
1085             gdth_update_timeout(hanum, scp, scp->SCp.buffers_residual);
1086         }
1087     }
1088     GDTH_UNLOCK_HA(ha, flags);
1089 }
1090
1091 static int gdth_update_timeout(int hanum, Scsi_Cmnd *scp, int timeout)
1092 {
1093     int oldto;
1094
1095     oldto = scp->timeout_per_command;
1096     scp->timeout_per_command = timeout;
1097
1098     if (timeout == 0) {
1099         del_timer(&scp->eh_timeout);
1100         scp->eh_timeout.data = (unsigned long) NULL;
1101         scp->eh_timeout.expires = 0;
1102     } else {
1103         if (scp->eh_timeout.data != (unsigned long) NULL)
1104             del_timer(&scp->eh_timeout);
1105         scp->eh_timeout.data = (unsigned long) scp;
1106         scp->eh_timeout.expires = jiffies + timeout;
1107         add_timer(&scp->eh_timeout);
1108     }
1109
1110     return oldto;
1111 }