drivers/scsi/gdth_proc.c

   1 /* gdth_proc.c
   2  * $Id: gdth_proc.c,v 1.43 2006/01/11 16:15:00 achim Exp $
   3  */
   4
   5 #include <linux/completion.h>
   6 #include <linux/slab.h>
   7
   8 int gdth_set_info(struct Scsi_Host *host, char *buffer, int length)
   9 {
  10     gdth_ha_str *ha = shost_priv(host);
  11     int ret_val = -EINVAL;
  12
  13     TRACE2(("gdth_set_info() ha %d\n",ha->hanum,));
  14
  15     if (length >= 4) {
  16         if (strncmp(buffer,"gdth",4) == 0) {
  17             buffer += 5;
  18             length -= 5;
  19             ret_val = gdth_set_asc_info(host, buffer, length, ha);
  20         }
  21     }
  22
  23     return ret_val;
  24 }
  25
  26 static int gdth_set_asc_info(struct Scsi_Host *host, char *buffer,
  27                         int length, gdth_ha_str *ha)
  28 {
  29     int orig_length, drive, wb_mode;
  30     int i, found;
  31     gdth_cmd_str    gdtcmd;
  32     gdth_cpar_str   *pcpar;
  33     u64         paddr;
  34
  35     char            cmnd[MAX_COMMAND_SIZE];
  36     memset(cmnd, 0xff, 12);
  37     memset(&gdtcmd, 0, sizeof(gdth_cmd_str));
  38
  39     TRACE2(("gdth_set_asc_info() ha %d\n",ha->hanum));
  40     orig_length = length + 5;
  41     drive = -1;
  42     wb_mode = 0;
  43     found = FALSE;
  44
  45     if (length >= 5 && strncmp(buffer,"flush",5)==0) {
  46         buffer += 6;
  47         length -= 6;
  48         if (length && *buffer>='0' && *buffer<='9') {
  49             drive = (int)(*buffer-'0');
  50             ++buffer; --length;
  51             if (length && *buffer>='0' && *buffer<='9') {
  52                 drive = drive*10 + (int)(*buffer-'0');
  53                 ++buffer; --length;
  54             }
  55             printk("GDT: Flushing host drive %d .. ",drive);
  56         } else {
  57             printk("GDT: Flushing all host drives .. ");
  58         }
  59         for (i = 0; i < MAX_HDRIVES; ++i) {
  60             if (ha->hdr[i].present) {
  61                 if (drive != -1 && i != drive)
  62                     continue;
  63                 found = TRUE;
  64                 gdtcmd.Service = CACHESERVICE;
  65                 gdtcmd.OpCode = GDT_FLUSH;
  66                 if (ha->cache_feat & GDT_64BIT) {
  67                     gdtcmd.u.cache64.DeviceNo = i;
  68                     gdtcmd.u.cache64.BlockNo = 1;
  69                 } else {
  70                     gdtcmd.u.cache.DeviceNo = i;
  71                     gdtcmd.u.cache.BlockNo = 1;
  72                 }
  73
  74                 gdth_execute(host, &gdtcmd, cmnd, 30, NULL);
  75             }
  76         }
  77         if (!found)
  78             printk("\nNo host drive found !\n");
  79         else
  80             printk("Done.\n");
  81         return(orig_length);
  82     }
  83
  84     if (length >= 7 && strncmp(buffer,"wbp_off",7)==0) {
  85         buffer += 8;
  86         length -= 8;
  87         printk("GDT: Disabling write back permanently .. ");
  88         wb_mode = 1;
  89     } else if (length >= 6 && strncmp(buffer,"wbp_on",6)==0) {
  90         buffer += 7;
  91         length -= 7;
  92         printk("GDT: Enabling write back permanently .. ");
  93         wb_mode = 2;
  94     } else if (length >= 6 && strncmp(buffer,"wb_off",6)==0) {
  95         buffer += 7;
  96         length -= 7;
  97         printk("GDT: Disabling write back commands .. ");
  98         if (ha->cache_feat & GDT_WR_THROUGH) {
  99             gdth_write_through = TRUE;
 100             printk("Done.\n");
 101         } else {
 102             printk("Not supported !\n");
 103         }
 104         return(orig_length);
 105     } else if (length >= 5 && strncmp(buffer,"wb_on",5)==0) {
 106         buffer += 6;
 107         length -= 6;
 108         printk("GDT: Enabling write back commands .. ");
 109         gdth_write_through = FALSE;
 110         printk("Done.\n");
 111         return(orig_length);
 112     }
 113
 114     if (wb_mode) {
 115         if (!gdth_ioctl_alloc(ha, sizeof(gdth_cpar_str), TRUE, &paddr))
 116             return(-EBUSY);
 117         pcpar = (gdth_cpar_str *)ha->pscratch;
 118         memcpy( pcpar, &ha->cpar, sizeof(gdth_cpar_str) );
 119         gdtcmd.Service = CACHESERVICE;
 120         gdtcmd.OpCode = GDT_IOCTL;
 121         gdtcmd.u.ioctl.p_param = paddr;
 122         gdtcmd.u.ioctl.param_size = sizeof(gdth_cpar_str);
 123         gdtcmd.u.ioctl.subfunc = CACHE_CONFIG;
 124         gdtcmd.u.ioctl.channel = INVALID_CHANNEL;
 125         pcpar->write_back = wb_mode==1 ? 0:1;
 126
 127         gdth_execute(host, &gdtcmd, cmnd, 30, NULL);
 128
 129         gdth_ioctl_free(ha, GDTH_SCRATCH, ha->pscratch, paddr);
 130         printk("Done.\n");
 131         return(orig_length);
 132     }
 133
 134     printk("GDT: Unknown command: %s  Length: %d\n",buffer,length);
 135     return(-EINVAL);
 136 }
 137
 138 int gdth_show_info(struct seq_file *m, struct Scsi_Host *host)
 139 {
 140     gdth_ha_str *ha = shost_priv(host);
 141     int hlen;
 142     int id, i, j, k, sec, flag;
 143     int no_mdrv = 0, drv_no, is_mirr;
 144     u32 cnt;
 145     u64 paddr;
 146     int rc = -ENOMEM;
 147
 148     gdth_cmd_str *gdtcmd;
 149     gdth_evt_str *estr;
 150     char hrec[161];
 151
 152     char *buf;
 153     gdth_dskstat_str *pds;
 154     gdth_diskinfo_str *pdi;
 155     gdth_arrayinf_str *pai;
 156     gdth_defcnt_str *pdef;
 157     gdth_cdrinfo_str *pcdi;
 158     gdth_hget_str *phg;
 159     char cmnd[MAX_COMMAND_SIZE];
 160
 161     gdtcmd = kmalloc(sizeof(*gdtcmd), GFP_KERNEL);
 162     estr = kmalloc(sizeof(*estr), GFP_KERNEL);
 163     if (!gdtcmd || !estr)
 164         goto free_fail;
 165
 166     memset(cmnd, 0xff, 12);
 167     memset(gdtcmd, 0, sizeof(gdth_cmd_str));
 168
 169     TRACE2(("gdth_get_info() ha %d\n",ha->hanum));
 170
 171
 172     /* request is i.e. "cat /proc/scsi/gdth/0" */
 173     /* format: %-15s\t%-10s\t%-15s\t%s */
 174     /* driver parameters */
 175     seq_puts(m, "Driver Parameters:\n");
 176     if (reserve_list[0] == 0xff)
 177         strcpy(hrec, "--");
 178     else {
 179         hlen = sprintf(hrec, "%d", reserve_list[0]);
 180         for (i = 1;  i < MAX_RES_ARGS; i++) {
 181             if (reserve_list[i] == 0xff)
 182                 break;
 183             hlen += snprintf(hrec + hlen , 161 - hlen, ",%d", reserve_list[i]);
 184         }
 185     }
 186     seq_printf(m,
 187                    " reserve_mode: \t%d         \treserve_list:  \t%s\n",
 188                    reserve_mode, hrec);
 189     seq_printf(m,
 190                    " max_ids:      \t%-3d       \thdr_channel:   \t%d\n",
 191                    max_ids, hdr_channel);
 192
 193     /* controller information */
 194     seq_puts(m, "\nDisk Array Controller Information:\n");
 195     seq_printf(m,
 196                    " Number:       \t%d         \tName:          \t%s\n",
 197                    ha->hanum, ha->binfo.type_string);
 198
 199     seq_printf(m,
 200                    " Driver Ver.:  \t%-10s\tFirmware Ver.: \t",
 201                    GDTH_VERSION_STR);
 202     if (ha->more_proc)
 203         seq_printf(m, "%d.%02d.%02d-%c%03X\n",
 204                 (u8)(ha->binfo.upd_fw_ver>>24),
 205                 (u8)(ha->binfo.upd_fw_ver>>16),
 206                 (u8)(ha->binfo.upd_fw_ver),
 207                 ha->bfeat.raid ? 'R':'N',
 208                 ha->binfo.upd_revision);
 209     else
 210         seq_printf(m, "%d.%02d\n", (u8)(ha->cpar.version>>8),
 211                 (u8)(ha->cpar.version));
 212
 213     if (ha->more_proc)
 214         /* more information: 1. about controller */
 215         seq_printf(m,
 216                        " Serial No.:   \t0x%8X\tCache RAM size:\t%d KB\n",
 217                        ha->binfo.ser_no, ha->binfo.memsize / 1024);
 218
 219 #ifdef GDTH_DMA_STATISTICS
 220     /* controller statistics */
 221     seq_puts(m, "\nController Statistics:\n");
 222     seq_printf(m,
 223                    " 32-bit DMA buffer:\t%lu\t64-bit DMA buffer:\t%lu\n",
 224                    ha->dma32_cnt, ha->dma64_cnt);
 225 #endif
 226
 227     if (ha->more_proc) {
 228         /* more information: 2. about physical devices */
 229         seq_puts(m, "\nPhysical Devices:");
 230         flag = FALSE;
 231
 232         buf = gdth_ioctl_alloc(ha, GDTH_SCRATCH, FALSE, &paddr);
 233         if (!buf)
 234             goto stop_output;
 235         for (i = 0; i < ha->bus_cnt; ++i) {
 236             /* 2.a statistics (and retries/reassigns) */
 237             TRACE2(("pdr_statistics() chn %d\n",i));
 238             pds = (gdth_dskstat_str *)(buf + GDTH_SCRATCH/4);
 239             gdtcmd->Service = CACHESERVICE;
 240             gdtcmd->OpCode = GDT_IOCTL;
 241             gdtcmd->u.ioctl.p_param = paddr + GDTH_SCRATCH/4;
 242             gdtcmd->u.ioctl.param_size = 3*GDTH_SCRATCH/4;
 243             gdtcmd->u.ioctl.subfunc = DSK_STATISTICS | L_CTRL_PATTERN;
 244             gdtcmd->u.ioctl.channel = ha->raw[i].address | INVALID_CHANNEL;
 245             pds->bid = ha->raw[i].local_no;
 246             pds->first = 0;
 247             pds->entries = ha->raw[i].pdev_cnt;
 248             cnt = (3*GDTH_SCRATCH/4 - 5 * sizeof(u32)) /
 249                 sizeof(pds->list[0]);
 250             if (pds->entries > cnt)
 251                 pds->entries = cnt;
 252
 253             if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) != S_OK)
 254                 pds->count = 0;
 255
 256             /* other IOCTLs must fit into area GDTH_SCRATCH/4 */
 257             for (j = 0; j < ha->raw[i].pdev_cnt; ++j) {
 258                 /* 2.b drive info */
 259                 TRACE2(("scsi_drv_info() chn %d dev %d\n",
 260                     i, ha->raw[i].id_list[j]));
 261                 pdi = (gdth_diskinfo_str *)buf;
 262                 gdtcmd->Service = CACHESERVICE;
 263                 gdtcmd->OpCode = GDT_IOCTL;
 264                 gdtcmd->u.ioctl.p_param = paddr;
 265                 gdtcmd->u.ioctl.param_size = sizeof(gdth_diskinfo_str);
 266                 gdtcmd->u.ioctl.subfunc = SCSI_DR_INFO | L_CTRL_PATTERN;
 267                 gdtcmd->u.ioctl.channel =
 268                     ha->raw[i].address | ha->raw[i].id_list[j];
 269
 270                 if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
 271                     strncpy(hrec,pdi->vendor,8);
 272                     strncpy(hrec+8,pdi->product,16);
 273                     strncpy(hrec+24,pdi->revision,4);
 274                     hrec[28] = 0;
 275                     seq_printf(m,
 276                                    "\n Chn/ID/LUN:   \t%c/%02d/%d    \tName:          \t%s\n",
 277                                    'A'+i,pdi->target_id,pdi->lun,hrec);
 278                     flag = TRUE;
 279                     pdi->no_ldrive &= 0xffff;
 280                     if (pdi->no_ldrive == 0xffff)
 281                         strcpy(hrec,"--");
 282                     else
 283                         sprintf(hrec,"%d",pdi->no_ldrive);
 284                     seq_printf(m,
 285                                    " Capacity [MB]:\t%-6d    \tTo Log. Drive: \t%s\n",
 286                                    pdi->blkcnt/(1024*1024/pdi->blksize),
 287                                    hrec);
 288                 } else {
 289                     pdi->devtype = 0xff;
 290                 }
 291
 292                 if (pdi->devtype == 0) {
 293                     /* search retries/reassigns */
 294                     for (k = 0; k < pds->count; ++k) {
 295                         if (pds->list[k].tid == pdi->target_id &&
 296                             pds->list[k].lun == pdi->lun) {
 297                             seq_printf(m,
 298                                            " Retries:      \t%-6d    \tReassigns:     \t%d\n",
 299                                            pds->list[k].retries,
 300                                            pds->list[k].reassigns);
 301                             break;
 302                         }
 303                     }
 304                     /* 2.c grown defects */
 305                     TRACE2(("scsi_drv_defcnt() chn %d dev %d\n",
 306                             i, ha->raw[i].id_list[j]));
 307                     pdef = (gdth_defcnt_str *)buf;
 308                     gdtcmd->Service = CACHESERVICE;
 309                     gdtcmd->OpCode = GDT_IOCTL;
 310                     gdtcmd->u.ioctl.p_param = paddr;
 311                     gdtcmd->u.ioctl.param_size = sizeof(gdth_defcnt_str);
 312                     gdtcmd->u.ioctl.subfunc = SCSI_DEF_CNT | L_CTRL_PATTERN;
 313                     gdtcmd->u.ioctl.channel =
 314                         ha->raw[i].address | ha->raw[i].id_list[j];
 315                     pdef->sddc_type = 0x08;
 316
 317                     if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
 318                         seq_printf(m,
 319                                        " Grown Defects:\t%d\n",
 320                                        pdef->sddc_cnt);
 321                     }
 322                 }
 323             }
 324         }
 325         gdth_ioctl_free(ha, GDTH_SCRATCH, buf, paddr);
 326
 327         if (!flag)
 328             seq_puts(m, "\n --\n");
 329
 330         /* 3. about logical drives */
 331         seq_puts(m, "\nLogical Drives:");
 332         flag = FALSE;
 333
 334         buf = gdth_ioctl_alloc(ha, GDTH_SCRATCH, FALSE, &paddr);
 335         if (!buf)
 336             goto stop_output;
 337         for (i = 0; i < MAX_LDRIVES; ++i) {
 338             if (!ha->hdr[i].is_logdrv)
 339                 continue;
 340             drv_no = i;
 341             j = k = 0;
 342             is_mirr = FALSE;
 343             do {
 344                 /* 3.a log. drive info */
 345                 TRACE2(("cache_drv_info() drive no %d\n",drv_no));
 346                 pcdi = (gdth_cdrinfo_str *)buf;
 347                 gdtcmd->Service = CACHESERVICE;
 348                 gdtcmd->OpCode = GDT_IOCTL;
 349                 gdtcmd->u.ioctl.p_param = paddr;
 350                 gdtcmd->u.ioctl.param_size = sizeof(gdth_cdrinfo_str);
 351                 gdtcmd->u.ioctl.subfunc = CACHE_DRV_INFO;
 352                 gdtcmd->u.ioctl.channel = drv_no;
 353                 if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) != S_OK)
 354                     break;
 355                 pcdi->ld_dtype >>= 16;
 356                 j++;
 357                 if (pcdi->ld_dtype > 2) {
 358                     strcpy(hrec, "missing");
 359                 } else if (pcdi->ld_error & 1) {
 360                     strcpy(hrec, "fault");
 361                 } else if (pcdi->ld_error & 2) {
 362                     strcpy(hrec, "invalid");
 363                     k++; j--;
 364                 } else {
 365                     strcpy(hrec, "ok");
 366                 }
 367
 368                 if (drv_no == i) {
 369                     seq_printf(m,
 370                                    "\n Number:       \t%-2d        \tStatus:        \t%s\n",
 371                                    drv_no, hrec);
 372                     flag = TRUE;
 373                     no_mdrv = pcdi->cd_ldcnt;
 374                     if (no_mdrv > 1 || pcdi->ld_slave != -1) {
 375                         is_mirr = TRUE;
 376                         strcpy(hrec, "RAID-1");
 377                     } else if (pcdi->ld_dtype == 0) {
 378                         strcpy(hrec, "Disk");
 379                     } else if (pcdi->ld_dtype == 1) {
 380                         strcpy(hrec, "RAID-0");
 381                     } else if (pcdi->ld_dtype == 2) {
 382                         strcpy(hrec, "Chain");
 383                     } else {
 384                         strcpy(hrec, "???");
 385                     }
 386                     seq_printf(m,
 387                                    " Capacity [MB]:\t%-6d    \tType:          \t%s\n",
 388                                    pcdi->ld_blkcnt/(1024*1024/pcdi->ld_blksize),
 389                                    hrec);
 390                 } else {
 391                     seq_printf(m,
 392                                    " Slave Number: \t%-2d        \tStatus:        \t%s\n",
 393                                    drv_no & 0x7fff, hrec);
 394                 }
 395                 drv_no = pcdi->ld_slave;
 396             } while (drv_no != -1);
 397
 398             if (is_mirr)
 399                 seq_printf(m,
 400                                " Missing Drv.: \t%-2d        \tInvalid Drv.:  \t%d\n",
 401                                no_mdrv - j - k, k);
 402
 403             if (!ha->hdr[i].is_arraydrv)
 404                 strcpy(hrec, "--");
 405             else
 406                 sprintf(hrec, "%d", ha->hdr[i].master_no);
 407             seq_printf(m,
 408                            " To Array Drv.:\t%s\n", hrec);
 409         }
 410         gdth_ioctl_free(ha, GDTH_SCRATCH, buf, paddr);
 411
 412         if (!flag)
 413             seq_puts(m, "\n --\n");
 414
 415         /* 4. about array drives */
 416         seq_puts(m, "\nArray Drives:");
 417         flag = FALSE;
 418
 419         buf = gdth_ioctl_alloc(ha, GDTH_SCRATCH, FALSE, &paddr);
 420         if (!buf)
 421             goto stop_output;
 422         for (i = 0; i < MAX_LDRIVES; ++i) {
 423             if (!(ha->hdr[i].is_arraydrv && ha->hdr[i].is_master))
 424                 continue;
 425             /* 4.a array drive info */
 426             TRACE2(("array_info() drive no %d\n",i));
 427             pai = (gdth_arrayinf_str *)buf;
 428             gdtcmd->Service = CACHESERVICE;
 429             gdtcmd->OpCode = GDT_IOCTL;
 430             gdtcmd->u.ioctl.p_param = paddr;
 431             gdtcmd->u.ioctl.param_size = sizeof(gdth_arrayinf_str);
 432             gdtcmd->u.ioctl.subfunc = ARRAY_INFO | LA_CTRL_PATTERN;
 433             gdtcmd->u.ioctl.channel = i;
 434             if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
 435                 if (pai->ai_state == 0)
 436                     strcpy(hrec, "idle");
 437                 else if (pai->ai_state == 2)
 438                     strcpy(hrec, "build");
 439                 else if (pai->ai_state == 4)
 440                     strcpy(hrec, "ready");
 441                 else if (pai->ai_state == 6)
 442                     strcpy(hrec, "fail");
 443                 else if (pai->ai_state == 8 || pai->ai_state == 10)
 444                     strcpy(hrec, "rebuild");
 445                 else
 446                     strcpy(hrec, "error");
 447                 if (pai->ai_ext_state & 0x10)
 448                     strcat(hrec, "/expand");
 449                 else if (pai->ai_ext_state & 0x1)
 450                     strcat(hrec, "/patch");
 451                 seq_printf(m,
 452                                "\n Number:       \t%-2d        \tStatus:        \t%s\n",
 453                                i,hrec);
 454                 flag = TRUE;
 455
 456                 if (pai->ai_type == 0)
 457                     strcpy(hrec, "RAID-0");
 458                 else if (pai->ai_type == 4)
 459                     strcpy(hrec, "RAID-4");
 460                 else if (pai->ai_type == 5)
 461                     strcpy(hrec, "RAID-5");
 462                 else
 463                     strcpy(hrec, "RAID-10");
 464                 seq_printf(m,
 465                                " Capacity [MB]:\t%-6d    \tType:          \t%s\n",
 466                                pai->ai_size/(1024*1024/pai->ai_secsize),
 467                                hrec);
 468             }
 469         }
 470         gdth_ioctl_free(ha, GDTH_SCRATCH, buf, paddr);
 471
 472         if (!flag)
 473             seq_puts(m, "\n --\n");
 474
 475         /* 5. about host drives */
 476         seq_puts(m, "\nHost Drives:");
 477         flag = FALSE;
 478
 479         buf = gdth_ioctl_alloc(ha, sizeof(gdth_hget_str), FALSE, &paddr);
 480         if (!buf)
 481             goto stop_output;
 482         for (i = 0; i < MAX_LDRIVES; ++i) {
 483             if (!ha->hdr[i].is_logdrv ||
 484                 (ha->hdr[i].is_arraydrv && !ha->hdr[i].is_master))
 485                 continue;
 486             /* 5.a get host drive list */
 487             TRACE2(("host_get() drv_no %d\n",i));
 488             phg = (gdth_hget_str *)buf;
 489             gdtcmd->Service = CACHESERVICE;
 490             gdtcmd->OpCode = GDT_IOCTL;
 491             gdtcmd->u.ioctl.p_param = paddr;
 492             gdtcmd->u.ioctl.param_size = sizeof(gdth_hget_str);
 493             gdtcmd->u.ioctl.subfunc = HOST_GET | LA_CTRL_PATTERN;
 494             gdtcmd->u.ioctl.channel = i;
 495             phg->entries = MAX_HDRIVES;
 496             phg->offset = GDTOFFSOF(gdth_hget_str, entry[0]);
 497             if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
 498                 ha->hdr[i].ldr_no = i;
 499                 ha->hdr[i].rw_attribs = 0;
 500                 ha->hdr[i].start_sec = 0;
 501             } else {
 502                 for (j = 0; j < phg->entries; ++j) {
 503                     k = phg->entry[j].host_drive;
 504                     if (k >= MAX_LDRIVES)
 505                         continue;
 506                     ha->hdr[k].ldr_no = phg->entry[j].log_drive;
 507                     ha->hdr[k].rw_attribs = phg->entry[j].rw_attribs;
 508                     ha->hdr[k].start_sec = phg->entry[j].start_sec;
 509                 }
 510             }
 511         }
 512         gdth_ioctl_free(ha, sizeof(gdth_hget_str), buf, paddr);
 513
 514         for (i = 0; i < MAX_HDRIVES; ++i) {
 515             if (!(ha->hdr[i].present))
 516                 continue;
 517
 518             seq_printf(m,
 519                            "\n Number:       \t%-2d        \tArr/Log. Drive:\t%d\n",
 520                            i, ha->hdr[i].ldr_no);
 521             flag = TRUE;
 522
 523             seq_printf(m,
 524                            " Capacity [MB]:\t%-6d    \tStart Sector:  \t%d\n",
 525                            (u32)(ha->hdr[i].size/2048), ha->hdr[i].start_sec);
 526         }
 527
 528         if (!flag)
 529             seq_puts(m, "\n --\n");
 530     }
 531
 532     /* controller events */
 533     seq_puts(m, "\nController Events:\n");
 534
 535     for (id = -1;;) {
 536         id = gdth_read_event(ha, id, estr);
 537         if (estr->event_source == 0)
 538             break;
 539         if (estr->event_data.eu.driver.ionode == ha->hanum &&
 540             estr->event_source == ES_ASYNC) {
 541             gdth_log_event(&estr->event_data, hrec);
 542
 543             /*
 544              * Elapsed seconds subtraction with unsigned operands is
 545              * safe from wrap around in year 2106.  Executes as:
 546              * operand a + (2's complement operand b) + 1
 547              */
 548
 549             sec = (int)((u32)ktime_get_real_seconds() - estr->first_stamp);
 550             if (sec < 0) sec = 0;
 551             seq_printf(m," date- %02d:%02d:%02d\t%s\n",
 552                            sec/3600, sec%3600/60, sec%60, hrec);
 553         }
 554         if (id == -1)
 555             break;
 556     }
 557 stop_output:
 558     rc = 0;
 559 free_fail:
 560     kfree(gdtcmd);
 561     kfree(estr);
 562     return rc;
 563 }
 564
 565 static char *gdth_ioctl_alloc(gdth_ha_str *ha, int size, int scratch,
 566                               u64 *paddr)
 567 {
 568     unsigned long flags;
 569     char *ret_val;
 570
 571     if (size == 0)
 572         return NULL;
 573
 574     spin_lock_irqsave(&ha->smp_lock, flags);
 575
 576     if (!ha->scratch_busy && size <= GDTH_SCRATCH) {
 577         ha->scratch_busy = TRUE;
 578         ret_val = ha->pscratch;
 579         *paddr = ha->scratch_phys;
 580     } else if (scratch) {
 581         ret_val = NULL;
 582     } else {
 583         dma_addr_t dma_addr;
 584
 585         ret_val = pci_alloc_consistent(ha->pdev, size, &dma_addr);
 586         *paddr = dma_addr;
 587     }
 588
 589     spin_unlock_irqrestore(&ha->smp_lock, flags);
 590     return ret_val;
 591 }
 592
 593 static void gdth_ioctl_free(gdth_ha_str *ha, int size, char *buf, u64 paddr)
 594 {
 595     unsigned long flags;
 596
 597     if (buf == ha->pscratch) {
 598         spin_lock_irqsave(&ha->smp_lock, flags);
 599         ha->scratch_busy = FALSE;
 600         spin_unlock_irqrestore(&ha->smp_lock, flags);
 601     } else {
 602         pci_free_consistent(ha->pdev, size, buf, paddr);
 603     }
 604 }
 605
 606 #ifdef GDTH_IOCTL_PROC
 607 static int gdth_ioctl_check_bin(gdth_ha_str *ha, u16 size)
 608 {
 609     unsigned long flags;
 610     int ret_val;
 611
 612     spin_lock_irqsave(&ha->smp_lock, flags);
 613
 614     ret_val = FALSE;
 615     if (ha->scratch_busy) {
 616         if (((gdth_iord_str *)ha->pscratch)->size == (u32)size)
 617             ret_val = TRUE;
 618     }
 619     spin_unlock_irqrestore(&ha->smp_lock, flags);
 620     return ret_val;
 621 }
 622 #endif
 623
 624 static void gdth_wait_completion(gdth_ha_str *ha, int busnum, int id)
 625 {
 626     unsigned long flags;
 627     int i;
 628     Scsi_Cmnd *scp;
 629     struct gdth_cmndinfo *cmndinfo;
 630     u8 b, t;
 631
 632     spin_lock_irqsave(&ha->smp_lock, flags);
 633
 634     for (i = 0; i < GDTH_MAXCMDS; ++i) {
 635         scp = ha->cmd_tab[i].cmnd;
 636         cmndinfo = gdth_cmnd_priv(scp);
 637
 638         b = scp->device->channel;
 639         t = scp->device->id;
 640         if (!SPECIAL_SCP(scp) && t == (u8)id &&
 641             b == (u8)busnum) {
 642             cmndinfo->wait_for_completion = 0;
 643             spin_unlock_irqrestore(&ha->smp_lock, flags);
 644             while (!cmndinfo->wait_for_completion)
 645                 barrier();
 646             spin_lock_irqsave(&ha->smp_lock, flags);
 647         }
 648     }
 649     spin_unlock_irqrestore(&ha->smp_lock, flags);
 650 }