drivers/scsi/eata

/* */
This source file includes following definitions.
eata_scsi_done
eata_fake_int_handler
eata_release
eata_int_handler
eata_send_command
eata_send_immediate
eata_queue
eata_abort
eata_reset
get_board_data
check_blink_state
get_conf_PIO
print_config
register_HBA
find_EISA
find_ISA
find_PCI
eata_detect
   1 /************************************************************
   2  *                                                          *
   3  *                  Linux EATA SCSI driver                  *
   4  *                                                          *
   5  *  based on the CAM document CAM/89-004 rev. 2.0c,         *
   6  *  DPT's driver kit, some internal documents and source,   *
   7  *  and several other Linux scsi drivers and kernel docs.   *
   8  *                                                          *
   9  *  The driver currently:                                   *
  10  *      -supports all ISA based EATA-DMA boards             *
  11  *      -supports all EISA based EATA-DMA boards            *
  12  *      -supports all PCI based EATA-DMA boards             *
  13  *      -supports multiple HBAs with & without IRQ sharing  *
  14  *      -supports all SCSI channels on multi channel boards *
  15  *      -needs identical IDs on all channels of a HBA       * 
  16  *      -can be loaded as module                            *
  17  *      -displays statistical and hardware information      *
  18  *       in /proc/scsi/eata_dma                             *
  19  *      -provides rudimentary latency measurement           * 
  20  *       possibilities via /proc/scsi/eata_dma/<hostnum>    *
  21  *                                                          *
  22  *  (c)1993,94,95 Michael Neuffer                           *
  23  *                neuffer@goofy.zdv.uni-mainz.de            *
  24  *                                                          *
  25  *  This program is free software; you can redistribute it  *
  26  *  and/or modify it under the terms of the GNU General     *
  27  *  Public License as published by the Free Software        *
  28  *  Foundation; either version 2 of the License, or         *
  29  *  (at your option) any later version.                     *
  30  *                                                          *
  31  *  This program is distributed in the hope that it will be *
  32  *  useful, but WITHOUT ANY WARRANTY; without even the      *
  33  *  implied warranty of MERCHANTABILITY or FITNESS FOR A    *
  34  *  PARTICULAR PURPOSE.  See the GNU General Public License *
  35  *  for more details.                                       *
  36  *                                                          *
  37  *  You should have received a copy of the GNU General      *
  38  *  Public License along with this kernel; if not, write to *
  39  *  the Free Software Foundation, Inc., 675 Mass Ave,       *
  40  *  Cambridge, MA 02139, USA.                               *
  41  *                                                          *
  42  * I have to thank DPT for their excellent support. I took  *
  43  * me almost a year and a stopover at their HQ, on my first *
  44  * trip to the USA, to get it, but since then they've been  *
  45  * very helpful and tried to give me all the infos and      *
  46  * support I need.                                          *
  47  *                                                          *
  48  * Thanks also to Greg Hosler who did a lot of testing and  *
  49  * found quite a number of bugs during the development.     *
  50  ************************************************************
  51  *  last change: 95/11/03                 OS: Linux 1.3.37  *
  52  ************************************************************/
  53 
  54 /* Look in eata_dma.h for configuration and revision information */
  55 
  56 #include <linux/module.h>
  57  
  58 #include <linux/kernel.h>
  59 #include <linux/sched.h>
  60 #include <linux/string.h>
  61 #include <linux/ioport.h>
  62 #include <linux/malloc.h>
  63 #include <linux/in.h>
  64 #include <linux/bios32.h>
  65 #include <linux/pci.h>
  66 #include <linux/proc_fs.h>
  67 #include <asm/byteorder.h>
  68 #include <asm/types.h>
  69 #include <asm/io.h>
  70 #include <asm/dma.h>
  71 #include <linux/blk.h>
  72 #include "scsi.h"
  73 #include "sd.h"
  74 #include "hosts.h"
  75 #include <linux/scsicam.h>
  76 #include "eata_dma.h"
  77 #include "eata_dma_proc.h" 
  78 
  79 #include <linux/stat.h>
  80 #include <linux/config.h>       /* for CONFIG_PCI */
  81 
  82 struct proc_dir_entry proc_scsi_eata_dma = {
  83     PROC_SCSI_EATA, 8, "eata_dma",
  84     S_IFDIR | S_IRUGO | S_IXUGO, 2
  85 };
  86 
  87 static u32 ISAbases[] =
  88 {0x1F0, 0x170, 0x330, 0x230};
  89 static unchar EISAbases[] =
  90 {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
  91 static uint registered_HBAs = 0;
  92 static struct Scsi_Host *last_HBA = NULL;
  93 static struct Scsi_Host *first_HBA = NULL;
  94 static unchar reg_IRQ[] =
  95 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  96 static unchar reg_IRQL[] =
  97 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  98 static struct eata_sp *status = 0;   /* Statuspacket array   */
  99 static void *dma_scratch = 0;
 100 
 101 static u32 fake_int_base;
 102 static int fake_int_result;
 103 static int fake_int_happened;
 104 
 105 static ulong int_counter = 0;
 106 static ulong queue_counter = 0;
 107 
 108 void eata_scsi_done (Scsi_Cmnd * scmd)
     /*  */
 109 {
 110     scmd->request.rq_status = RQ_SCSI_DONE;
 111 
 112     if (scmd->request.sem != NULL)
 113         up(scmd->request.sem);
 114     
 115     return;
 116 }   
 117 
 118 void eata_fake_int_handler(s32 irq, struct pt_regs * regs)
     /*  */
 119 {
 120     fake_int_result = inb(fake_int_base + HA_RSTATUS);
 121     fake_int_happened = TRUE;
 122     DBG(DBG_INTR3, printk("eata_fake_int_handler called irq%d base %#x"
 123                           " res %#x\n", irq, fake_int_base, fake_int_result));
 124     return;
 125 }
 126 
 127 #include "eata_dma_proc.c"
 128 
 129 #ifdef MODULE
 130 int eata_release(struct Scsi_Host *sh)
     /*  */
 131 {
 132     uint i;
 133     if (sh->irq && reg_IRQ[sh->irq] == 1) free_irq(sh->irq);
 134     else reg_IRQ[sh->irq]--;
 135     
 136     scsi_init_free((void *)status, 512);
 137     scsi_init_free((void *)dma_scratch, 512);
 138     for (i = 0; i < sh->can_queue; i++){ /* Free all SG arrays */
 139         if(SD(sh)->ccb[i].sg_list != NULL)
 140             scsi_init_free((void *) SD(sh)->ccb[i].sg_list, 
 141                            sh->sg_tablesize * sizeof(struct eata_sg_list));
 142     }
 143     
 144     if (SD(sh)->channel == 0) {
 145         if (sh->dma_channel != BUSMASTER) free_dma(sh->dma_channel);
 146         if (sh->io_port && sh->n_io_port)
 147             release_region(sh->io_port, sh->n_io_port);
 148     }
 149     return(TRUE);
 150 }
 151 #endif
 152 
 153 
 154 void eata_int_handler(int irq, struct pt_regs * regs)
     /*  */
 155 {
 156     uint i, result = 0;
 157     uint hba_stat, scsi_stat, eata_stat;
 158     Scsi_Cmnd *cmd;
 159     struct eata_ccb *cp;
 160     struct eata_sp *sp;
 161     uint base;
 162     ulong flags;
 163     uint x;
 164     struct Scsi_Host *sh;
 165 
 166     save_flags(flags);
 167     cli();
 168 
 169     for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev) {
 170         if (sh->irq != irq)
 171             continue;
 172         if (!(inb((uint)sh->base + HA_RAUXSTAT) & HA_AIRQ))
 173             continue;
 174         
 175         int_counter++;
 176         
 177         sp=&SD(sh)->sp;
 178         
 179         if((cp = sp->ccb) == NULL) {
 180             eata_stat = inb(base + HA_RSTATUS);
 181             printk("eata_dma: Board: %x Spurious IRQ %lx "
 182                    "received. CCB pointer not set.\n", base, (long)cp);
 183             restore_flags(flags);
 184             return;
 185         }
 186         cmd = cp->cmd;
 187         base = (uint) cmd->host->base;
 188         
 189         hba_stat = sp->hba_stat;
 190         
 191         scsi_stat = (sp->scsi_stat >> 1) & 0x1f; 
 192        
 193         if (sp->EOC == FALSE) {
 194             eata_stat = inb(base + HA_RSTATUS);
 195             printk("eata_dma: int_handler, board: %x cmd %lx returned "
 196                    "unfinished.\nEATA: %x HBA: %x SCSI: %x spadr %lx spadrirq "
 197                    "%lx, irq%d\n", base, (long)cp, eata_stat, hba_stat, 
 198                    scsi_stat,(long)&status, (long)&status[irq], irq);
 199             DBG(DBG_DELAY, DEL2(800));
 200             restore_flags(flags);
 201             return;
 202         } 
 203         
 204         if (cp->status == LOCKED) {
 205             cp->status = FREE;
 206             eata_stat = inb(base + HA_RSTATUS);
 207             printk("eata_dma: int_handler, freeing locked queueslot\n");
 208             DBG(DBG_INTR && DBG_DELAY, DEL2(800));
 209             restore_flags(flags);
 210             return;
 211         }
 212         
 213         eata_stat = inb(base + HA_RSTATUS); 
 214         DBG(DBG_INTR, printk("IRQ %d received, base %#.4x, pid %ld, target: "
 215                              "%x, lun: %x, ea_s: %#.2x, hba_s: %#.2x \n", 
 216                              irq, base, cmd->pid, cmd->target, cmd->lun, 
 217                              eata_stat, hba_stat));
 218 
 219         switch (hba_stat) {
 220         case HA_NO_ERROR:       /* NO Error */
 221             if (scsi_stat == CONDITION_GOOD
 222                 && cmd->device->type == TYPE_DISK
 223                 && (HD(cmd)->t_state[cp->cp_channel][cp->cp_id] == RESET))
 224                 result = DID_BUS_BUSY << 16;        
 225             else if (scsi_stat == GOOD) {
 226                 HD(cmd)->t_state[cp->cp_channel][cp->cp_id] = OK;
 227                 if(HD(cmd)->do_latency == TRUE && cp->timestamp) {
 228                     uint time;
 229                     time = jiffies - cp->timestamp;
 230                     if((cp->rw_latency) == TRUE) { /* was WRITE */
 231                         if(HD(cmd)->writes_lat[cp->sizeindex][1] > time)
 232                             HD(cmd)->writes_lat[cp->sizeindex][1] = time;
 233                         if(HD(cmd)->writes_lat[cp->sizeindex][2] < time)
 234                             HD(cmd)->writes_lat[cp->sizeindex][2] = time;
 235                         HD(cmd)->writes_lat[cp->sizeindex][3] += time;
 236                         HD(cmd)->writes_lat[cp->sizeindex][0]++;
 237                     } else {
 238                         if(HD(cmd)->reads_lat[cp->sizeindex][1] > time)
 239                             HD(cmd)->reads_lat[cp->sizeindex][1] = time;
 240                         if(HD(cmd)->reads_lat[cp->sizeindex][2] < time)
 241                             HD(cmd)->reads_lat[cp->sizeindex][2] = time;
 242                         HD(cmd)->reads_lat[cp->sizeindex][3] += time;
 243                         HD(cmd)->reads_lat[cp->sizeindex][0]++;
 244                     }
 245                 }
 246             }
 247             else if (scsi_stat == CHECK_CONDITION
 248                      && cmd->device->type == TYPE_DISK
 249                      && (cmd->sense_buffer[2] & 0xf) == RECOVERED_ERROR)
 250                 result = DID_BUS_BUSY << 16;
 251             else
 252                 result = DID_OK << 16;
 253             HD(cmd)->t_timeout[cp->cp_channel][cp->cp_id] = OK;
 254             break;
 255         case HA_ERR_SEL_TO:     /* Selection Timeout */
 256             result = DID_BAD_TARGET << 16;  
 257             break;
 258         case HA_ERR_CMD_TO:     /* Command Timeout   */
 259             if (HD(cmd)->t_timeout[cp->cp_channel][cp->cp_id] > 1)
 260                 result = DID_ERROR << 16;
 261             else {
 262                 result = DID_TIME_OUT << 16;
 263                 HD(cmd)->t_timeout[cp->cp_channel][cp->cp_id]++;
 264             }
 265             break;
 266         case HA_ERR_RESET:              /* SCSI Bus Reset Received */
 267         case HA_INIT_POWERUP:           /* Initial Controller Power-up */
 268             if (cmd->device->type != TYPE_TAPE)
 269                 result = DID_BUS_BUSY << 16;
 270             else
 271                 result = DID_ERROR << 16;
 272             
 273             for (i = 0; i < MAXTARGET; i++)
 274                 HD(cmd)->t_state[cp->cp_channel][i] = RESET;
 275             break;
 276         case HA_UNX_BUSPHASE:       /* Unexpected Bus Phase */
 277         case HA_UNX_BUS_FREE:       /* Unexpected Bus Free */
 278         case HA_BUS_PARITY:         /* Bus Parity Error */
 279         case HA_SCSI_HUNG:          /* SCSI Hung */
 280         case HA_UNX_MSGRJCT:        /* Unexpected Message Reject */
 281         case HA_RESET_STUCK:        /* SCSI Bus Reset Stuck */
 282         case HA_RSENSE_FAIL:        /* Auto Request-Sense Failed */
 283         case HA_PARITY_ERR:         /* Controller Ram Parity */
 284         default:
 285             result = DID_ERROR << 16;
 286             break;
 287         }
 288         cmd->result = result | (scsi_stat << 1); 
 289         
 290 #if DBG_INTR2
 291         if (scsi_stat || result || hba_stat || eata_stat != 0x50 
 292             || cmd->scsi_done == NULL || cmd->device->id == 7) 
 293             printk("HBA: %d, channel %d, id: %d, lun %d, pid %ld:\n" 
 294                    "eata_stat %#x, hba_stat %#.2x, scsi_stat %#.2x, "
 295                    "sense_key: %#x, result: %#.8x\n", 
 296                    x, cmd->device->channel, cmd->device->id, cmd->device->lun,
 297                    cmd->pid, eata_stat, hba_stat, scsi_stat, 
 298                    cmd->sense_buffer[2] & 0xf, cmd->result); 
 299         DBG(DBG_INTR&&DBG_DELAY,DEL2(800));
 300 #endif
 301         
 302         cp->status = FREE;          /* now we can release the slot  */
 303         cmd->scsi_done(cmd);
 304     }
 305     restore_flags(flags);
 306     
 307     return;
 308 }
 309 
 310 inline int eata_send_command(u32 addr, u32 base, u8 command)
     /*  */
 311 {
 312     long loop = R_LIMIT;
 313     
 314     while (inb(base + HA_RAUXSTAT) & HA_ABUSY)
 315         if (--loop == 0)
 316             return(FALSE);
 317 
 318     /* And now the address in nice little byte chunks */
 319     outb( addr & 0x000000ff,        base + HA_WDMAADDR);
 320     outb((addr & 0x0000ff00) >> 8,  base + HA_WDMAADDR + 1);
 321     outb((addr & 0x00ff0000) >> 16, base + HA_WDMAADDR + 2);
 322     outb((addr & 0xff000000) >> 24, base + HA_WDMAADDR + 3);
 323     outb(command, base + HA_WCOMMAND);
 324     return(TRUE);
 325 }
 326 
 327 #if 0 
 328 inline int eata_send_immediate(u32 addr, u32 base, u8 cmnd, u8 cmnd2, u8 id, 
     /*  */
 329                                u8 lun)
 330 {
 331     if(addr){
 332         outb( addr & 0x000000ff,        base + HA_WDMAADDR);
 333         outb((addr & 0x0000ff00) >> 8,  base + HA_WDMAADDR + 1);
 334         outb((addr & 0x00ff0000) >> 16, base + HA_WDMAADDR + 2);
 335         outb((addr & 0xff000000) >> 24, base + HA_WDMAADDR + 3);
 336     } else {
 337         outb(id,  base + HA_WSUBCODE);
 338         outb(lun, base + HA_WSUBLUN);
 339     }
 340     
 341     outb(cmnd2, base + HA_WCOMMAND2);
 342     outb(cmnd,  base + HA_WCOMMAND);
 343     return(TRUE);
 344 }
 345 #endif
 346 
 347 int eata_queue(Scsi_Cmnd * cmd, void (* done) (Scsi_Cmnd *))
     /*  */
 348 {
 349     unsigned int i, x, y;
 350     u32 flags;
 351     hostdata *hd;
 352     struct Scsi_Host *sh;
 353     struct eata_ccb *cp;
 354     struct scatterlist *sl;
 355     
 356     save_flags(flags);
 357     cli();
 358     
 359     queue_counter++;
 360 
 361     hd = HD(cmd);
 362     sh = cmd->host;
 363     
 364     /* check for free slot */
 365     for (y = hd->last_ccb + 1, x = 0; x < sh->can_queue; x++, y++) { 
 366         if (y >= sh->can_queue)
 367             y = 0;
 368         if (hd->ccb[y].status == FREE)
 369             break;
 370     }
 371     
 372     hd->last_ccb = y;
 373 
 374     if (x >= sh->can_queue) { 
 375         uint z;
 376         
 377         printk(KERN_EMERG "eata_dma: run out of queue slots cmdno:%ld"
 378                " intrno: %ld, can_queue: %d, x: %d, y: %d\n", 
 379                queue_counter, int_counter, sh->can_queue, x, y);
 380         printk(KERN_EMERG "Status of queueslots:");
 381         for(z = 0; z < sh->can_queue; z +=2) {
 382             switch(hd->ccb[z].status) {
 383             case FREE:
 384                 printk(KERN_EMERG "Slot %2d is FREE  \t", z);
 385                 break;
 386             case USED:
 387                 printk(KERN_EMERG "Slot %2d is USED  \t", z);
 388                 break;
 389             case LOCKED:
 390                 printk(KERN_EMERG "Slot %2d is LOCKED\t", z);
 391                 break;
 392             default:
 393                 printk(KERN_EMERG "Slot %2d is UNKNOWN\t", z);
 394             }
 395             panic("\nSystem halted.\n");
 396         }
 397     }
 398     cp = &hd->ccb[y];
 399     
 400     memset(cp, 0, sizeof(struct eata_ccb) - sizeof(struct eata_sg_list *));
 401     
 402     cp->status = USED;                  /* claim free slot */
 403     
 404     DBG(DBG_QUEUE, printk("eata_queue pid %ld, target: %x, lun: %x, y %d\n",
 405                           cmd->pid, cmd->target, cmd->lun, y));
 406     DBG(DBG_QUEUE && DBG_DELAY, DEL2(250));
 407     
 408     if(hd->do_latency == TRUE) {
 409         int x, z;
 410         short *sho;
 411         long *lon;
 412         x = 0;  /* just to keep GCC quiet */ 
 413         if (cmd->cmnd[0] == WRITE_6 || cmd->cmnd[0] == WRITE_10 || 
 414             cmd->cmnd[0] == WRITE_12 || cmd->cmnd[0] == READ_6 || 
 415             cmd->cmnd[0] == READ_10 || cmd->cmnd[0] == READ_12) {
 416             
 417             cp->timestamp = jiffies;    /* For latency measurements */
 418             switch(cmd->cmnd[0]) {
 419             case WRITE_6:   
 420             case READ_6:    
 421                 x = cmd->cmnd[4]/2; 
 422                 break;
 423             case WRITE_10:   
 424             case READ_10:
 425                 sho = (short *) &cmd->cmnd[7];
 426                 x = ntohs(*sho)/2;            
 427                 break;
 428             case WRITE_12:   
 429             case READ_12:
 430                 lon = (long *) &cmd->cmnd[6];
 431                 x = ntohl(*lon)/2;            
 432                 break;
 433             }
 434 
 435             for(z = 0; (x > (1 << z)) && (z <= 11); z++) 
 436                 /* nothing */;
 437             cp->sizeindex = z;
 438             if (cmd->cmnd[0] == WRITE_6 || cmd->cmnd[0] == WRITE_10 || 
 439                 cmd->cmnd[0] == WRITE_12){
 440                 cp->rw_latency = TRUE;
 441             }
 442         }
 443     }
 444     cmd->scsi_done = (void *)done;
 445     
 446     switch (cmd->cmnd[0]) {
 447     case CHANGE_DEFINITION: case COMPARE:         case COPY:
 448     case COPY_VERIFY:       case LOG_SELECT:      case MODE_SELECT:
 449     case MODE_SELECT_10:    case SEND_DIAGNOSTIC: case WRITE_BUFFER:
 450     case FORMAT_UNIT:       case REASSIGN_BLOCKS: case RESERVE:
 451     case SEARCH_EQUAL:      case SEARCH_HIGH:     case SEARCH_LOW:
 452     case WRITE_6:           case WRITE_10:        case WRITE_VERIFY:
 453     case UPDATE_BLOCK:      case WRITE_LONG:      case WRITE_SAME:      
 454     case SEARCH_HIGH_12:    case SEARCH_EQUAL_12: case SEARCH_LOW_12:
 455     case WRITE_12:          case WRITE_VERIFY_12: case SET_WINDOW: 
 456     case MEDIUM_SCAN:       case SEND_VOLUME_TAG:            
 457     case 0xea:      /* alternate number for WRITE LONG */
 458         cp->DataOut = TRUE;     /* Output mode */
 459         break;
 460     case TEST_UNIT_READY:
 461     default:
 462         cp->DataIn = TRUE;      /* Input mode  */
 463     }
 464 
 465     /* FIXME: This will will have to be changed once the midlevel driver 
 466      *        allows different HBA IDs on every channel.
 467      */
 468     if (cmd->target == sh->this_id) 
 469         cp->Interpret = TRUE;   /* Interpret command */
 470 
 471     if (cmd->use_sg) {
 472         cp->scatter = TRUE;     /* SG mode     */
 473         if (cp->sg_list == NULL) {
 474             cp->sg_list = kmalloc(SG_SIZE_BIG*sizeof(struct eata_sg_list),
 475                                   GFP_ATOMIC | GFP_DMA);
 476         }
 477         if (cp->sg_list == NULL)
 478             panic("eata_dma: Run out of DMA memory for SG lists !\n");
 479         cp->cp_dataDMA = htonl(virt_to_bus(cp->sg_list)); 
 480         
 481         cp->cp_datalen = htonl(cmd->use_sg * sizeof(struct eata_sg_list));
 482         sl=(struct scatterlist *)cmd->request_buffer;
 483         for(i = 0; i < cmd->use_sg; i++, sl++){
 484             cp->sg_list[i].data = htonl(virt_to_bus(sl->address));
 485             cp->sg_list[i].len = htonl((u32) sl->length);
 486         }
 487     } else {
 488         cp->scatter = FALSE;
 489         cp->cp_datalen = htonl(cmd->request_bufflen);
 490         cp->cp_dataDMA = htonl(virt_to_bus(cmd->request_buffer));
 491     }
 492     
 493     cp->Auto_Req_Sen = TRUE;
 494     cp->cp_reqDMA = htonl(virt_to_bus(cmd->sense_buffer));
 495     cp->reqlen = sizeof(cmd->sense_buffer);
 496     
 497     cp->cp_id = cmd->target;
 498     cp->cp_channel = cmd->channel;
 499     cp->cp_lun = cmd->lun;
 500     cp->cp_dispri = TRUE;
 501     cp->cp_identify = TRUE;
 502     memcpy(cp->cp_cdb, cmd->cmnd, cmd->cmd_len);
 503     
 504     cp->cp_statDMA = htonl(virt_to_bus(&(hd->sp)));
 505     
 506     cp->cp_viraddr = cp; /* This will be passed thru, so we don't need to 
 507                           * convert it */
 508     cp->cmd = cmd;
 509     cmd->host_scribble = (char *)&hd->ccb[y];   
 510     
 511     if(eata_send_command((u32) cp, (u32) sh->base, EATA_CMD_DMA_SEND_CP) == FALSE) {
 512         cmd->result = DID_BUS_BUSY << 16;
 513         DBG(DBG_QUEUE && DBG_ABNORM, 
 514             printk("eata_queue target %d, pid %ld, HBA busy, "
 515                    "returning DID_BUS_BUSY\n",cmd->target, cmd->pid));
 516         done(cmd);
 517         cp->status = FREE;    
 518         restore_flags(flags);
 519         return(0);
 520     }
 521     DBG(DBG_QUEUE, printk("Queued base %#.4x pid: %ld target: %x lun: %x "
 522                          "slot %d irq %d\n", (s32)sh->base, cmd->pid, 
 523                          cmd->target, cmd->lun, y, sh->irq));
 524     DBG(DBG_QUEUE && DBG_DELAY, DEL2(200));
 525     restore_flags(flags);
 526     return(0);
 527 }
 528 
 529 
 530 int eata_abort(Scsi_Cmnd * cmd)
     /*  */
 531 {
 532     ulong flags;
 533     ulong loop = R_LIMIT;
 534 
 535     save_flags(flags);
 536     cli();
 537 
 538     DBG(DBG_ABNORM, printk("eata_abort called pid: %ld target: %x lun: %x"
 539                            " reason %x\n", cmd->pid, cmd->target, cmd->lun, 
 540                            cmd->abort_reason));
 541     DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 542     
 543     
 544     while (inb((u32)(cmd->host->base) + HA_RAUXSTAT) & HA_ABUSY)
 545         if (--loop == 0) {
 546             printk("eata_dma: abort, timeout error.\n");
 547             restore_flags(flags);
 548             DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 549             return (SCSI_ABORT_ERROR);
 550         }
 551     if (CD(cmd)->status == USED) {
 552         DBG(DBG_ABNORM, printk("Returning: SCSI_ABORT_BUSY\n"));
 553         restore_flags(flags);
 554         return (SCSI_ABORT_BUSY);  /* SNOOZE */ 
 555     }
 556     if (CD(cmd)->status == FREE) {
 557         DBG(DBG_ABNORM, printk("Returning: SCSI_ABORT_NOT_RUNNING\n")); 
 558         restore_flags(flags);
 559         return (SCSI_ABORT_NOT_RUNNING);
 560     }
 561     if (CD(cmd)->status == RESET) {
 562         restore_flags(flags);
 563         printk("eata_dma: abort, command reset error.\n");
 564         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 565         return (SCSI_ABORT_ERROR);
 566     }
 567     if (CD(cmd)->status == LOCKED) {
 568         restore_flags(flags);
 569         DBG(DBG_ABNORM, printk("eata_dma: abort, queue slot locked.\n"));
 570         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 571         return (SCSI_ABORT_NOT_RUNNING);
 572     }
 573     restore_flags(flags);
 574     panic("eata_dma: abort: invalid slot status\n");
 575 }
 576 
 577 int eata_reset(Scsi_Cmnd * cmd)
     /*  */
 578 {
 579     ushort x, z; 
 580     ulong time, limit = 0;
 581     ulong loop = R_LIMIT;
 582     ulong flags;
 583     unchar success = FALSE;
 584     Scsi_Cmnd *sp; 
 585     
 586     save_flags(flags);
 587     cli();
 588     
 589     DBG(DBG_ABNORM, printk("eata_reset called pid:%ld target: %x lun: %x"
 590                            " reason %x\n", cmd->pid, cmd->target, cmd->lun, 
 591                            cmd->abort_reason));
 592         
 593     if (HD(cmd)->state == RESET) {
 594         printk("eata_reset: exit, already in reset.\n");
 595         restore_flags(flags);
 596         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 597         return (SCSI_RESET_ERROR);
 598     }
 599     
 600     while (inb((u32)(cmd->host->base) + HA_RAUXSTAT) & HA_ABUSY)
 601         if (--loop == 0) {
 602             printk("eata_reset: exit, timeout error.\n");
 603             restore_flags(flags);
 604             DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 605             return (SCSI_RESET_ERROR);
 606         }
 607  
 608     for (x = 0; x < MAXCHANNEL; x++) {
 609         for (z = 0; z < MAXTARGET; z++) {
 610             HD(cmd)->t_state[x][z] = RESET;
 611             HD(cmd)->t_timeout[x][z] = NO_TIMEOUT;
 612         }
 613     }
 614 
 615     for (x = 0; x < cmd->host->can_queue; x++) {
 616         if (HD(cmd)->ccb[x].status == FREE)
 617             continue;
 618         
 619         if (HD(cmd)->ccb[x].status == LOCKED) {
 620             HD(cmd)->ccb[x].status = FREE;
 621             printk("eata_reset: locked slot %d forced free.\n", x);
 622             DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 623             continue;
 624         }
 625         sp = HD(cmd)->ccb[x].cmd;
 626         HD(cmd)->ccb[x].status = RESET;
 627         printk("eata_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
 628         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 629         
 630         if (sp == NULL)
 631             panic("eata_reset: slot %d, sp==NULL.\n", x);
 632         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 633         
 634         if (sp == cmd)
 635             success = TRUE;
 636     }
 637     
 638     /* hard reset the HBA  */
 639     inb((u32) (cmd->host->base) + HA_RSTATUS);  /* This might cause trouble */
 640     eata_send_command(0, (u32) cmd->host->base, EATA_CMD_RESET);
 641     
 642     DBG(DBG_ABNORM, printk("eata_reset: board reset done, enabling interrupts.\n"));
 643     HD(cmd)->state = RESET;
 644     
 645     restore_flags(flags);
 646     
 647     time = jiffies;
 648     while (jiffies < (time + (3 * HZ)) || limit++ < 10000000)
 649         /* As time goes by... */;
 650     
 651     save_flags(flags);
 652     cli();
 653     
 654     DBG(DBG_ABNORM, printk("eata_reset: interrupts disabled, loops %ld.\n", 
 655                            limit));
 656     DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 657     
 658     for (x = 0; x < cmd->host->can_queue; x++) {
 659         
 660         /* Skip slots already set free by interrupt */
 661         if (HD(cmd)->ccb[x].status != RESET)
 662             continue;
 663         
 664         sp = HD(cmd)->ccb[x].cmd;
 665         sp->result = DID_RESET << 16;
 666         
 667         /* This mailbox is still waiting for its interrupt */
 668         HD(cmd)->ccb[x].status = LOCKED;
 669         
 670         printk("eata_reset: slot %d locked, DID_RESET, pid %ld done.\n",
 671                x, sp->pid);
 672         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 673         restore_flags(flags);
 674         sp->scsi_done(sp);
 675         cli();
 676     }
 677     
 678     HD(cmd)->state = FALSE;
 679     restore_flags(flags);
 680     
 681     if (success) {
 682         DBG(DBG_ABNORM, printk("eata_reset: exit, success.\n"));
 683         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 684         return (SCSI_RESET_SUCCESS);
 685     } else {
 686         DBG(DBG_ABNORM, printk("eata_reset: exit, wakeup.\n"));
 687         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 688         return (SCSI_RESET_PUNT);
 689     }
 690 }
 691 
 692 char * get_board_data(u32 base, u32 irq, u32 id)
     /*  */
 693 {
 694     struct eata_ccb *cp;
 695     struct eata_sp  *sp;
 696     static char *buff;
 697     ulong i;
 698     ulong limit = 0;
 699 
 700     cp = (struct eata_ccb *) scsi_init_malloc(sizeof(struct eata_ccb),
 701                                               GFP_ATOMIC | GFP_DMA);
 702     sp = (struct eata_sp *) scsi_init_malloc(sizeof(struct eata_sp), 
 703                                              GFP_ATOMIC | GFP_DMA);
 704 
 705     buff = dma_scratch;
 706  
 707     memset(cp, 0, sizeof(struct eata_ccb));
 708     memset(sp, 0, sizeof(struct eata_sp));
 709     memset(buff, 0, 256);
 710 
 711     cp->DataIn = TRUE;     
 712     cp->Interpret = TRUE;   /* Interpret command */
 713     cp->cp_dispri = TRUE;
 714     cp->cp_identify = TRUE;
 715  
 716     cp->cp_datalen = htonl(56);  
 717     cp->cp_dataDMA = htonl(virt_to_bus(buff));
 718     cp->cp_statDMA = htonl(virt_to_bus(sp));
 719     cp->cp_viraddr = cp;
 720     
 721     cp->cp_id = id;
 722     cp->cp_lun = 0;
 723 
 724     cp->cp_cdb[0] = INQUIRY;
 725     cp->cp_cdb[1] = 0;
 726     cp->cp_cdb[2] = 0;
 727     cp->cp_cdb[3] = 0;
 728     cp->cp_cdb[4] = 56;
 729     cp->cp_cdb[5] = 0;
 730 
 731     fake_int_base = base;
 732     fake_int_result = FALSE;
 733     fake_int_happened = FALSE;
 734 
 735     eata_send_command((u32) cp, (u32) base, EATA_CMD_DMA_SEND_CP);
 736     
 737     i = jiffies + (3 * HZ);
 738     while (fake_int_happened == FALSE && jiffies <= i) 
 739         barrier();
 740     
 741     DBG(DBG_INTR3, printk("fake_int_result: %#x hbastat %#x scsistat %#x,"
 742                           " buff %p sp %p\n",
 743                           fake_int_result, (u32) (sp->hba_stat /*& 0x7f*/), 
 744                           (u32) sp->scsi_stat, buff, sp));
 745 
 746     scsi_init_free((void *)cp, sizeof(struct eata_ccb));
 747     scsi_init_free((void *)sp, sizeof(struct eata_sp));
 748     
 749     if ((fake_int_result & HA_SERROR) || jiffies > i){
 750         /* hard reset the HBA  */
 751         inb((u32) (base) + HA_RSTATUS);
 752         eata_send_command(0, base, EATA_CMD_RESET);
 753         i = jiffies;
 754         while (jiffies < (i + (3 * HZ)) && limit++ < 10000000) 
 755             barrier();
 756         return (NULL);
 757     } else
 758         return (buff);
 759 }
 760     
 761 int check_blink_state(long base)
     /*  */
 762 {
 763     ushort loops = 10;
 764     u32 blinkindicator;
 765     u32 state = 0x12345678;
 766     u32 oldstate = 0;
 767 
 768     blinkindicator = htonl(0x54504442);
 769     while ((loops--) && (state != oldstate)) {
 770         oldstate = state;
 771         state = inl((uint) base + 1);
 772     }
 773 
 774     DBG(DBG_BLINK, printk("Did Blink check. Status: %d\n",
 775               (state == oldstate) && (state == blinkindicator)));
 776 
 777     if ((state == oldstate) && (state == blinkindicator))
 778         return(TRUE);
 779     else
 780         return (FALSE);
 781 }
 782 
 783 int get_conf_PIO(u32 base, struct get_conf *buf)
     /*  */
 784 {
 785     ulong loop = R_LIMIT;
 786     u16 *p;
 787 
 788     if(check_region(base, 9)) 
 789         return (FALSE);
 790      
 791     memset(buf, 0, sizeof(struct get_conf));
 792 
 793     while (inb(base + HA_RSTATUS) & HA_SBUSY)
 794         if (--loop == 0) 
 795             return (FALSE);
 796        
 797     DBG(DBG_PIO && DBG_PROBE,
 798         printk("Issuing PIO READ CONFIG to HBA at %#x\n", base));
 799     eata_send_command(0, base, EATA_CMD_PIO_READ_CONFIG);
 800 
 801     loop = R_LIMIT;
 802     for (p = (u16 *) buf; 
 803          (long)p <= ((long)buf + (sizeof(struct get_conf) / 2)); p++) {
 804         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 805             if (--loop == 0)
 806                 return (FALSE);
 807 
 808         loop = R_LIMIT;
 809         *p = inw(base + HA_RDATA);
 810     }
 811 
 812     if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {            /* Error ? */
 813         if (htonl(EATA_SIGNATURE) == buf->signature) {
 814             DBG(DBG_PIO&&DBG_PROBE, printk("EATA Controller found at %x "
 815                                            "EATA Level: %x\n", (uint) base, 
 816                                            (uint) (buf->version)));
 817             
 818             while (inb(base + HA_RSTATUS) & HA_SDRQ) 
 819                 inw(base + HA_RDATA);
 820             return (TRUE);
 821         } 
 822     } else {
 823         DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during transfer "
 824                   "for HBA at %lx\n", (long)base));
 825     }
 826     return (FALSE);
 827 }
 828 
 829 void print_config(struct get_conf *gc)
     /*  */
 830 {
 831     printk("Please check values: (read config data)\n");
 832     printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d DMAS:%d\n",
 833            (u32) ntohl(gc->len), gc->version,
 834            gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support,
 835            gc->DMA_support);
 836     printk("DMAV:%d HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n",
 837            gc->DMA_valid, gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2],
 838            gc->scsi_id[1], ntohs(gc->queuesiz), ntohs(gc->SGsiz), gc->SECOND);
 839     printk("IRQ:%d IRQT:%d DMAC:%d FORCADR:%d SG_64K:%d SG_UAE:%d MID:%d "
 840            "MCH:%d MLUN:%d\n",
 841            gc->IRQ, gc->IRQ_TR, (8 - gc->DMA_channel) & 7, gc->FORCADR, 
 842            gc->SG_64K, gc->SG_UAE, gc->MAX_ID, gc->MAX_CHAN, gc->MAX_LUN); 
 843     printk("RIDQ:%d PCI:%d EISA:%d\n",
 844            gc->ID_qest, gc->is_PCI, gc->is_EISA);
 845     DBG(DPT_DEBUG, DELAY(14));
 846 }
 847 
 848 short register_HBA(u32 base, struct get_conf *gc, Scsi_Host_Template * tpnt, 
     /*  */
 849                    u8 bustype)
 850 {
 851     ulong size = 0;
 852     unchar dma_channel = 0;
 853     char *buff = 0;
 854     unchar bugs = 0;
 855     struct Scsi_Host *sh;
 856     hostdata *hd;
 857     int x;
 858     
 859     
 860     DBG(DBG_REGISTER, print_config(gc));
 861 
 862     if (gc->DMA_support == FALSE) {
 863         printk("The EATA HBA at %#.4x does not support DMA.\n" 
 864                "Please use the EATA-PIO driver.\n", base);
 865         return (FALSE);
 866     }
 867     if(gc->HAA_valid == FALSE || ntohl(gc->len) < 0x22) 
 868         gc->MAX_CHAN = 0;
 869     
 870     if (reg_IRQ[gc->IRQ] == FALSE) {    /* Interrupt already registered ? */
 871         if (!request_irq(gc->IRQ, (void *) eata_fake_int_handler, SA_INTERRUPT,
 872                          "eata_dma")){
 873             reg_IRQ[gc->IRQ]++;
 874             if (!gc->IRQ_TR)
 875                 reg_IRQL[gc->IRQ] = TRUE;   /* IRQ is edge triggered */
 876         } else {
 877             printk("Couldn't allocate IRQ %d, Sorry.", gc->IRQ);
 878             return (FALSE);
 879         }
 880     } else {            /* More than one HBA on this IRQ */
 881         if (reg_IRQL[gc->IRQ] == TRUE) {
 882             printk("Can't support more than one HBA on this IRQ,\n"
 883                    "  if the IRQ is edge triggered. Sorry.\n");
 884             return (FALSE);
 885         } else
 886             reg_IRQ[gc->IRQ]++;
 887     }
 888     
 889     /* if gc->DMA_valid it must be an ISA HBA and we have to register it */
 890     dma_channel = BUSMASTER;
 891     if (gc->DMA_valid) {
 892         if (request_dma(dma_channel = (8 - gc->DMA_channel) & 7, "eata_dma")) {
 893             printk("Unable to allocate DMA channel %d for ISA HBA at %#.4x.\n",
 894                    dma_channel, base);
 895             reg_IRQ[gc->IRQ]--;
 896             if (reg_IRQ[gc->IRQ] == 0)
 897                 free_irq(gc->IRQ);
 898             if (gc->IRQ_TR == FALSE)
 899                 reg_IRQL[gc->IRQ] = FALSE; 
 900             return (FALSE);
 901         }
 902     }
 903  
 904 #if !(NEWSTUFF)
 905     if (bustype != IS_EISA && bustype != IS_ISA)
 906 #endif
 907         buff = get_board_data(base, gc->IRQ, gc->scsi_id[3]);
 908 
 909     if (buff == NULL) {
 910 #if !(NEWSTUFF)
 911         if (bustype == IS_EISA || bustype == IS_ISA) {
 912             bugs = bugs || BROKEN_INQUIRY;
 913         } else {
 914 #endif
 915             if (gc->DMA_support == FALSE)
 916                 printk("HBA at %#.4x doesn't support DMA. Sorry\n", base);
 917             else
 918                 printk("HBA at %#.4x does not react on INQUIRY. Sorry.\n", 
 919                        base);
 920             if (gc->DMA_valid) 
 921                 free_dma(dma_channel);
 922             reg_IRQ[gc->IRQ]--;
 923             if (reg_IRQ[gc->IRQ] == 0)
 924                 free_irq(gc->IRQ);
 925             if (gc->IRQ_TR == FALSE)
 926                 reg_IRQL[gc->IRQ] = FALSE; 
 927             return (FALSE);
 928 #if !(NEWSTUFF)
 929         }
 930 #endif
 931     }
 932     
 933     if (gc->DMA_support == FALSE && buff != NULL)  
 934         printk("HBA %.12sat %#.4x doesn't set the DMA_support flag correctly.\n",
 935                &buff[16], base);
 936     
 937     request_region(base, 9, "eata_dma"); /* We already checked the 
 938                                           * availability, so this
 939                                           * should not fail.
 940                                           */
 941     
 942     if(ntohs(gc->queuesiz) == 0) {
 943         gc->queuesiz = ntohs(64);
 944         printk("Warning: Queue size has to be corrected. Assuming 64 queueslots\n"
 945                "         This might be a PM2012B with a defective Firmware\n");
 946     }
 947 
 948     size = sizeof(hostdata) + ((sizeof(struct eata_ccb) + sizeof(long)) 
 949                                * ntohs(gc->queuesiz));
 950 
 951     DBG(DBG_REGISTER, printk("scsi_register size: %ld\n", size));
 952 
 953     sh = scsi_register(tpnt, size);
 954     
 955     if(sh == NULL) {
 956         if (gc->DMA_valid) 
 957             free_dma(dma_channel);
 958         
 959         reg_IRQ[gc->IRQ]--;
 960         if (reg_IRQ[gc->IRQ] == 0)
 961             free_irq(gc->IRQ);
 962         if (gc->IRQ_TR == FALSE)
 963             reg_IRQL[gc->IRQ] = FALSE; 
 964         return (FALSE);
 965     }
 966     
 967     hd = SD(sh);                   
 968     
 969     memset(hd->ccb, 0, sizeof(struct eata_ccb) * ntohs(gc->queuesiz));
 970     memset(hd->reads, 0, sizeof(u32) * 26); 
 971 
 972     hd->broken_INQUIRY = (bugs & BROKEN_INQUIRY);
 973 
 974     if(hd->broken_INQUIRY == TRUE) {
 975         strcpy(SD(sh)->vendor, "DPT");
 976         strcpy(SD(sh)->name, "??????????");
 977         strcpy(SD(sh)->revision, "???.?");
 978     } else {    
 979         strncpy(SD(sh)->vendor, &buff[8], 8);
 980         SD(sh)->vendor[8] = 0;
 981         strncpy(SD(sh)->name, &buff[16], 17);
 982         SD(sh)->name[17] = 0;
 983         SD(sh)->revision[0] = buff[32];
 984         SD(sh)->revision[1] = buff[33];
 985         SD(sh)->revision[2] = buff[34];
 986         SD(sh)->revision[3] = '.';
 987         SD(sh)->revision[4] = buff[35];
 988         SD(sh)->revision[5] = 0;
 989     }
 990 
 991     switch (ntohl(gc->len)) {
 992     case 0x1c:
 993         SD(sh)->EATA_revision = 'a';
 994         break;
 995     case 0x1e:
 996         SD(sh)->EATA_revision = 'b';
 997         break;
 998     case 0x22:
 999         SD(sh)->EATA_revision = 'c';
1000         break;
1001     case 0x24:
1002         SD(sh)->EATA_revision = 'z';            
1003     default:
1004         SD(sh)->EATA_revision = '?';
1005     }
1006 
1007     if(ntohl(gc->len) >= 0x22) {
1008         if (gc->is_PCI == TRUE)
1009             hd->bustype = IS_PCI;
1010         else if (gc->is_EISA == TRUE)
1011             hd->bustype = IS_EISA;
1012         else
1013             hd->bustype = IS_ISA;
1014     } else if(hd->broken_INQUIRY == FALSE) {
1015         if (buff[21] == '4')
1016             hd->bustype = IS_PCI;
1017         else if (buff[21] == '2')
1018             hd->bustype = IS_EISA;
1019         else
1020             hd->bustype = IS_ISA;
1021     } else 
1022         hd->bustype = bustype;
1023     
1024     if(ntohl(gc->len) >= 0x22) {
1025         sh->max_id = gc->MAX_ID + 1;
1026         sh->max_lun = gc->MAX_LUN + 1;
1027     } else {
1028         sh->max_id = 8;
1029         sh->max_lun = 8;
1030     }
1031 
1032     hd->channel = gc->MAX_CHAN;     
1033     sh->max_channel = gc->MAX_CHAN; 
1034     sh->unique_id = base;
1035     sh->base = (char *) base;
1036     sh->io_port = base;
1037     sh->n_io_port = 9;
1038     sh->irq = gc->IRQ;
1039     sh->dma_channel = dma_channel;
1040     
1041     /* FIXME:
1042      * SCSI midlevel code should support different HBA ids on every channel
1043      */
1044     sh->this_id = gc->scsi_id[3];
1045     sh->can_queue = ntohs(gc->queuesiz);
1046     
1047     if (gc->OCS_enabled == TRUE) {
1048         if(hd->bustype != IS_ISA)
1049             sh->cmd_per_lun = sh->can_queue/C_P_L_DIV; 
1050         else
1051             sh->cmd_per_lun = 8; /* We artificially limit this to conserve 
1052                                   * memory, which would be needed for ISA 
1053                                   * bounce buffers */
1054     } else 
1055         sh->cmd_per_lun = 1;
1056     
1057     /* FIXME:
1058      * SG should be allocated more dynamically 
1059      */
1060     /*
1061      * If we are using a ISA board, we can't use extended SG,
1062      * because we would need exessive amounts of memory for
1063      * bounce buffers.
1064      */
1065     if (gc->SG_64K == TRUE && ntohs(gc->SGsiz) == 64 && hd->bustype != IS_ISA){
1066         sh->sg_tablesize = SG_SIZE_BIG;
1067         sh->use_clustering = FALSE;
1068     } else {
1069         sh->sg_tablesize = ntohs(gc->SGsiz);
1070         sh->use_clustering = TRUE;
1071         if (sh->sg_tablesize > SG_SIZE || sh->sg_tablesize == 0) {
1072             sh->sg_tablesize = SG_SIZE;
1073             if (ntohs(gc->SGsiz) == 0)
1074                 printk("Warning: SG size had to be corrected.\n"
1075                        "This might be a PM2012 with a defective Firmware\n");
1076         }
1077     }
1078     
1079     if (gc->SECOND)
1080         hd->primary = FALSE;
1081     else
1082         hd->primary = TRUE;
1083     
1084     sh->wish_block = FALSE;        
1085     
1086     if (hd->bustype != IS_ISA) {
1087         sh->unchecked_isa_dma = FALSE;
1088     } else {
1089         sh->unchecked_isa_dma = TRUE;   /* We're doing ISA DMA */
1090     }
1091     
1092     for(x = 0; x <= 11; x++){            /* Initialize min. latency */
1093         hd->writes_lat[x][1] = 0xffffffff;
1094         hd->reads_lat[x][1] = 0xffffffff;
1095     }
1096 
1097     hd->next = NULL;    /* build a linked list of all HBAs */
1098     hd->prev = last_HBA;
1099     if(hd->prev != NULL)
1100         SD(hd->prev)->next = sh;
1101     last_HBA = sh;
1102     if (first_HBA == NULL)
1103         first_HBA = sh;
1104     registered_HBAs++;
1105     
1106     return (TRUE);
1107 }
1108 
1109 
1110 void find_EISA(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
1111 {
1112     u32 base;
1113     int i;
1114     
1115 #if CHECKPAL
1116     u8 pal1, pal2, pal3;
1117 #endif
1118     
1119     for (i = 0; i < MAXEISA; i++) {
1120         if (EISAbases[i] == TRUE) { /* Still a possibility ?          */
1121             
1122             base = 0x1c88 + (i * 0x1000);
1123 #if CHECKPAL
1124             pal1 = inb((u16)base - 8);
1125             pal2 = inb((u16)base - 7);
1126             pal3 = inb((u16)base - 6);
1127             
1128             if (((pal1 == DPT_ID1) && (pal2 == DPT_ID2)) ||
1129                 ((pal1 == NEC_ID1) && (pal2 == NEC_ID2) && (pal3 == NEC_ID3))||
1130                 ((pal1 == ATT_ID1) && (pal2 == ATT_ID2) && (pal3 == ATT_ID3))){
1131                 DBG(DBG_PROBE, printk("EISA EATA id tags found: %x %x %x \n",
1132                                       (int)pal1, (int)pal2, (int)pal3));
1133 #endif
1134                 if (get_conf_PIO(base, buf) == TRUE) {
1135                     if (buf->IRQ) {  
1136                         DBG(DBG_EISA, printk("Registering EISA HBA\n"));
1137                         register_HBA(base, buf, tpnt, IS_EISA);
1138                     } else
1139                         printk("eata_dma: No valid IRQ. HBA removed from list\n");
1140                 } else {
1141                     if (check_blink_state(base)) 
1142                         printk("HBA is in BLINK state. Consult your HBAs "
1143                                "Manual to correct this.\n");
1144                 } 
1145                 /* Nothing found here so we take it from the list */
1146                 EISAbases[i] = 0;  
1147 #if CHECKPAL
1148             } 
1149 #endif
1150         }
1151     }
1152     return; 
1153 }
1154 
1155 void find_ISA(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
1156 {
1157     int i;
1158     
1159     for (i = 0; i < MAXISA; i++) {  
1160         if (ISAbases[i]) {  
1161             if (get_conf_PIO(ISAbases[i],buf) == TRUE){
1162                 DBG(DBG_ISA, printk("Registering ISA HBA\n"));
1163                 register_HBA(ISAbases[i], buf, tpnt, IS_ISA);
1164             } else {
1165                 if (check_blink_state(ISAbases[i])) 
1166                     printk("HBA is in BLINK state. Consult your HBAs "
1167                            "Manual to correct this.\n");
1168             }
1169             ISAbases[i] = 0;
1170         }
1171     }
1172     return;
1173 }
1174 
1175 void find_PCI(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
1176 {
1177 
1178 #ifndef CONFIG_PCI
1179     printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
1180 #else
1181     
1182     u8 pci_bus, pci_device_fn;
1183     static s16 pci_index = 0;   /* Device index to PCI BIOS calls */
1184     u32 base = 0;
1185     u16 com_adr;
1186     u16 rev_device;
1187     u32 error, i, x;
1188     u8 pal1, pal2, pal3;
1189 
1190     if (pcibios_present()) {
1191         for (i = 0; i <= MAXPCI; ++i, ++pci_index) {
1192             if (pcibios_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, 
1193                                     pci_index, &pci_bus, &pci_device_fn))
1194                 break;
1195             DBG(DBG_PROBE && DBG_PCI, 
1196                 printk("eata_dma: HBA at bus %d, device %d,"
1197                        " function %d, index %d\n", (s32)pci_bus, 
1198                        (s32)((pci_device_fn & 0xf8) >> 3),
1199                        (s32)(pci_device_fn & 7), pci_index));
1200             
1201             if (!(error = pcibios_read_config_word(pci_bus, pci_device_fn, 
1202                                        PCI_CLASS_DEVICE, &rev_device))) {
1203                 if (rev_device == PCI_CLASS_STORAGE_SCSI) {
1204                     if (!(error = pcibios_read_config_word(pci_bus, 
1205                                                pci_device_fn, PCI_COMMAND, 
1206                                                (u16 *) & com_adr))) {
1207                         if (!((com_adr & PCI_COMMAND_IO) && 
1208                               (com_adr & PCI_COMMAND_MASTER))) {
1209                             printk("eata_dma: HBA has IO or BUSMASTER mode disabled\n");
1210                             continue;
1211                         }
1212                     } else
1213                         printk("eata_dma: error %x while reading "
1214                                "PCI_COMMAND\n", error);
1215                 } else
1216                     printk("eata_dma: DEVICECLASSID %x didn't match\n", 
1217                            rev_device);
1218             } else {
1219                 printk("eata_dma: error %x while reading PCI_CLASS_BASE\n", 
1220                        error);
1221                 continue;
1222             }
1223             
1224             if (!(error = pcibios_read_config_dword(pci_bus, pci_device_fn,
1225                                        PCI_BASE_ADDRESS_0, (int *) &base))){
1226                 
1227                 /* Check if the address is valid */
1228                 if (base & 0x01) {
1229                     base &= 0xfffffffe;
1230                     /* EISA tag there ? */
1231                     pal1 = inb(base);
1232                     pal2 = inb(base + 1);
1233                     pal3 = inb(base + 2);
1234                     if (((pal1 == DPT_ID1) && (pal2 == DPT_ID2)) ||
1235                         ((pal1 == NEC_ID1) && (pal2 == NEC_ID2) && 
1236                          (pal3 == NEC_ID3)) ||
1237                         ((pal1 == ATT_ID1) && (pal2 == ATT_ID2) && 
1238                          (pal3 == ATT_ID3)))
1239                         base += 0x08;
1240                     else
1241                         base += 0x10;   /* Now, THIS is the real address */
1242 
1243                     if (base != 0x1f8) {
1244                         /* We didn't find it in the primary search */
1245                         if (get_conf_PIO(base, buf) == TRUE) {
1246 
1247                             /* OK. We made it till here, so we can go now  
1248                              * and register it. We  only have to check and 
1249                              * eventually remove it from the EISA and ISA list 
1250                              */
1251                             DBG(DBG_PCI, printk("Registering PCI HBA\n"));
1252                             register_HBA(base, buf, tpnt, IS_PCI);
1253                             
1254                             if (base < 0x1000) {
1255                                 for (x = 0; x < MAXISA; ++x) {
1256                                     if (ISAbases[x] == base) {
1257                                         ISAbases[x] = 0;
1258                                         break;
1259                                     }
1260                                 }
1261                             } else if ((base & 0x0fff) == 0x0c88) 
1262                                 EISAbases[(base >> 12) & 0x0f] = 0;
1263                             continue;  /* break; */
1264                         } else if (check_blink_state(base) == TRUE) {
1265                             printk("eata_dma: HBA is in BLINK state.\n"
1266                                    "Consult your HBAs Manual to correct this.\n");
1267                         }
1268                     }
1269                 }
1270             } else {
1271                 printk("eata_dma: error %x while reading "
1272                        "PCI_BASE_ADDRESS_0\n", error);
1273             }
1274         }
1275     } else {
1276         printk("eata_dma: No BIOS32 extensions present. This driver release "
1277                "still depends on it.\n"
1278                "          Skipping scan for PCI HBAs. \n");
1279     }
1280 #endif /* #ifndef CONFIG_PCI */
1281     return;
1282 }
1283 
1284 int eata_detect(Scsi_Host_Template * tpnt)
     /*  */
1285 {
1286     struct Scsi_Host *HBA_ptr;
1287     struct get_conf gc;
1288     int i;
1289     
1290     DBG((DBG_PROBE && DBG_DELAY) || DPT_DEBUG,
1291         printk("Using lots of delays to let you read the debugging output\n"));
1292 
1293     tpnt->proc_dir = &proc_scsi_eata_dma;
1294 
1295     status = scsi_init_malloc(512, GFP_ATOMIC | GFP_DMA);
1296     dma_scratch = scsi_init_malloc(512, GFP_ATOMIC | GFP_DMA);
1297 
1298     if(status == NULL || dma_scratch == NULL) {
1299         printk("eata_dma: can't allocate enough memory to probe for hosts !\n");
1300         return(0);
1301     }
1302 
1303     find_PCI(&gc, tpnt);
1304     
1305     find_EISA(&gc, tpnt);
1306     
1307     find_ISA(&gc, tpnt);
1308     
1309     for (i = 0; i <= MAXIRQ; i++) { /* Now that we know what we have, we     */
1310         if (reg_IRQ[i]){            /* exchange the interrupt handler which  */
1311             free_irq(i);            /* we used for probing with the real one */
1312             request_irq(i, (void *)(eata_int_handler), SA_INTERRUPT, "eata_dma");
1313         }
1314     }
1315     HBA_ptr = first_HBA;
1316     
1317     if (registered_HBAs != 0) {
1318         printk("EATA (Extended Attachment) driver version: %d.%d%s\n"
1319                "developed in co-operation with DPT\n"             
1320                "(c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de\n",
1321                VER_MAJOR, VER_MINOR, VER_SUB);
1322         printk("Registered HBAs:");
1323         printk("\nHBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: DMA: Ch: "
1324                "ID: Pr: QS: SG: CPL:\n");
1325         for (i = 1; i <= registered_HBAs; i++) {
1326             printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4x   %2d",
1327                    HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
1328                    SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P')? 
1329                    "PCI ":(SD(HBA_ptr)->bustype == 'E')?"EISA":"ISA ",
1330                    (u32) HBA_ptr->base, HBA_ptr->irq);
1331             if(HBA_ptr->dma_channel != BUSMASTER)
1332                 printk("   %2x ", HBA_ptr->dma_channel);
1333             else
1334                 printk("  %s", "BMST");
1335             printk("  %d   %d   %c  %2d  %2d   %2d\n", SD(HBA_ptr)->channel, 
1336                    HBA_ptr->this_id, (SD(HBA_ptr)->primary == TRUE)?'Y':'N', 
1337                    HBA_ptr->can_queue, HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
1338             HBA_ptr = SD(HBA_ptr)->next;
1339         }
1340     } else {
1341         scsi_init_free((void *)status, 512);
1342     }
1343 
1344     scsi_init_free((void *)dma_scratch, 512);
1345 
1346     DBG(DPT_DEBUG, DELAY(12));
1347 
1348     return(registered_HBAs);
1349 }
1350 
1351 #ifdef MODULE
1352 /* Eventually this will go into an include file, but this will be later */
1353 Scsi_Host_Template driver_template = EATA_DMA;
1354 #include "scsi_module.c"
1355 #endif
1356 
1357 /*
1358  * Overrides for Emacs so that we almost follow Linus's tabbing style.
1359  * Emacs will notice this stuff at the end of the file and automatically
1360  * adjust the settings for this buffer only.  This must remain at the end
1361  * of the file.
1362  * ---------------------------------------------------------------------------
1363  * Local variables:
1364  * c-indent-level: 4
1365  * c-brace-imaginary-offset: 0
1366  * c-brace-offset: -4
1367  * c-argdecl-indent: 4
1368  * c-label-offset: -4
1369  * c-continued-statement-offset: 4
1370  * c-continued-brace-offset: 0
1371  * tab-width: 8
1372  * End:
1373  */
/* */
root/drivers/scsi/eata_dma.c

DEFINITIONS
