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: 95/11/29                 OS: Linux 1.3.45  *
  52  ************************************************************/
  53 
  54 /* Look in eata_dma.h for configuration and revision information */
  55 
  56 #include <linux/module.h>
  57 #include <linux/kernel.h>
  58 #include <linux/sched.h>
  59 #include <linux/string.h>
  60 #include <linux/ioport.h>
  61 #include <linux/malloc.h>
  62 #include <linux/in.h>
  63 #include <linux/bios32.h>
  64 #include <linux/pci.h>
  65 #include <linux/proc_fs.h>
  66 #include <asm/byteorder.h>
  67 #include <asm/types.h>
  68 #include <asm/io.h>
  69 #include <asm/dma.h>
  70 #include <linux/blk.h>
  71 #include "scsi.h"
  72 #include "sd.h"
  73 #include "hosts.h"
  74 #include <linux/scsicam.h>
  75 #include "eata_dma.h"
  76 #include "eata_dma_proc.h" 
  77 
  78 #include <linux/stat.h>
  79 #include <linux/config.h>       /* for CONFIG_PCI */
  80 
  81 struct proc_dir_entry proc_scsi_eata_dma = {
  82     PROC_SCSI_EATA, 8, "eata_dma",
  83     S_IFDIR | S_IRUGO | S_IXUGO, 2
  84 };
  85 
  86 static u32 ISAbases[] =
  87 {0x1F0, 0x170, 0x330, 0x230};
  88 static unchar EISAbases[] =
  89 {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
  90 static uint registered_HBAs = 0;
  91 static struct Scsi_Host *last_HBA = NULL;
  92 static struct Scsi_Host *first_HBA = NULL;
  93 static unchar reg_IRQ[] =
  94 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  95 static unchar reg_IRQL[] =
  96 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  97 static struct eata_sp *status = 0;   /* Statuspacket array   */
  98 static void *dma_scratch = 0;
  99 
 100 static struct eata_register *fake_int_base;
 101 static int fake_int_result;
 102 static int fake_int_happened;
 103 
 104 static ulong int_counter = 0;
 105 static ulong queue_counter = 0;
 106 
 107 void eata_scsi_done (Scsi_Cmnd * scmd)
     /*  */
 108 {
 109     scmd->request.rq_status = RQ_SCSI_DONE;
 110 
 111     if (scmd->request.sem != NULL)
 112         up(scmd->request.sem);
 113     
 114     return;
 115 }   
 116 
 117 void eata_fake_int_handler(s32 irq, void *dev_id, struct pt_regs * regs)
     /*  */
 118 {
 119     fake_int_result = inb((ulong)fake_int_base + HA_RSTATUS);
 120     fake_int_happened = TRUE;
 121     DBG(DBG_INTR3, printk("eata_fake_int_handler called irq%d base %p"
 122                           " res %#x\n", irq, fake_int_base, fake_int_result));
 123     return;
 124 }
 125 
 126 #include "eata_dma_proc.c"
 127 
 128 #ifdef MODULE
 129 int eata_release(struct Scsi_Host *sh)
     /*  */
 130 {
 131     uint i;
 132     if (sh->irq && reg_IRQ[sh->irq] == 1) free_irq(sh->irq, NULL);
 133     else reg_IRQ[sh->irq]--;
 134     
 135     scsi_init_free((void *)status, 512);
 136     scsi_init_free((void *)dma_scratch, 512);
 137     for (i = 0; i < sh->can_queue; i++){ /* Free all SG arrays */
 138         if(SD(sh)->ccb[i].sg_list != NULL)
 139             scsi_init_free((void *) SD(sh)->ccb[i].sg_list, 
 140                            sh->sg_tablesize * sizeof(struct eata_sg_list));
 141     }
 142     
 143     if (SD(sh)->channel == 0) {
 144         if (sh->dma_channel != BUSMASTER) free_dma(sh->dma_channel);
 145         if (sh->io_port && sh->n_io_port)
 146             release_region(sh->io_port, sh->n_io_port);
 147     }
 148     return(TRUE);
 149 }
 150 #endif
 151 
 152 
 153 void eata_int_handler(int irq, void *dev_id, struct pt_regs * regs)
     /*  */
 154 {
 155     uint i, result = 0;
 156     uint hba_stat, scsi_stat, eata_stat;
 157     Scsi_Cmnd *cmd;
 158     struct eata_ccb *cp;
 159     struct eata_sp *sp;
 160     uint base;
 161     ulong flags;
 162     uint x;
 163     struct Scsi_Host *sh;
 164 
 165     save_flags(flags);
 166     cli();
 167 
 168     for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->next) {
 169         if (sh->irq != irq)
 170             continue;
 171         
 172         while(inb((uint)sh->base + HA_RAUXSTAT) & HA_AIRQ) {
 173             
 174             int_counter++;
 175             
 176             sp = &SD(sh)->sp;
 177             cp = sp->ccb;
 178             
 179             if(cp == NULL) {
 180                 eata_stat = inb((uint)sh->base + HA_RSTATUS);
 181                 printk("eata_dma: int_handler, Spurious IRQ %d "
 182                        "received. CCB pointer not set.\n", irq);
 183                 break;
 184             }
 185 
 186             cmd = cp->cmd;
 187             base = (uint) cmd->host->base;
 188             hba_stat = sp->hba_stat;
 189             
 190             scsi_stat = (sp->scsi_stat >> 1) & 0x1f; 
 191             
 192             if (sp->EOC == FALSE) {
 193                 eata_stat = inb(base + HA_RSTATUS);
 194                 printk("eata_dma: int_handler, board: %x cmd %lx returned "
 195                        "unfinished.\nEATA: %x HBA: %x SCSI: %x spadr %lx "
 196                        "spadrirq %lx, irq%d\n", base, (long)cp, eata_stat, 
 197                        hba_stat, scsi_stat,(long)&status, (long)&status[irq], 
 198                        irq);
 199                 DBG(DBG_DELAY, DEL2(800));
 200                 break;
 201             } 
 202             
 203             if (cp->status == LOCKED) {
 204                 cp->status = FREE;
 205                 eata_stat = inb(base + HA_RSTATUS);
 206                 printk("eata_dma: int_handler, freeing locked queueslot\n");
 207                 DBG(DBG_INTR && DBG_DELAY, DEL2(800));
 208                 break;
 209             }
 210             
 211             eata_stat = inb(base + HA_RSTATUS); 
 212             DBG(DBG_INTR, printk("IRQ %d received, base %#.4x, pid %ld, "
 213                                  "target: %x, lun: %x, ea_s: %#.2x, hba_s: "
 214                                  "%#.2x \n", irq, base, cmd->pid, cmd->target,
 215                                  cmd->lun, eata_stat, hba_stat));
 216             
 217             switch (hba_stat) {
 218             case HA_NO_ERROR:   /* NO Error */
 219                 if (scsi_stat == CONDITION_GOOD
 220                     && cmd->device->type == TYPE_DISK
 221                     && (HD(cmd)->t_state[cp->cp_channel][cp->cp_id] == RESET))
 222                     result = DID_BUS_BUSY << 16;            
 223                 else if (scsi_stat == GOOD) {
 224                     HD(cmd)->t_state[cp->cp_channel][cp->cp_id] = OK;
 225                     if(HD(cmd)->do_latency == TRUE && cp->timestamp) {
 226                         uint time;
 227                         time = jiffies - cp->timestamp;
 228                         if((cp->rw_latency) == TRUE) { /* was WRITE */
 229                             if(HD(cmd)->writes_lat[cp->sizeindex][1] > time)
 230                                 HD(cmd)->writes_lat[cp->sizeindex][1] = time;
 231                             if(HD(cmd)->writes_lat[cp->sizeindex][2] < time)
 232                                 HD(cmd)->writes_lat[cp->sizeindex][2] = time;
 233                             HD(cmd)->writes_lat[cp->sizeindex][3] += time;
 234                             HD(cmd)->writes_lat[cp->sizeindex][0]++;
 235                         } else {
 236                             if(HD(cmd)->reads_lat[cp->sizeindex][1] > time)
 237                                 HD(cmd)->reads_lat[cp->sizeindex][1] = time;
 238                             if(HD(cmd)->reads_lat[cp->sizeindex][2] < time)
 239                                 HD(cmd)->reads_lat[cp->sizeindex][2] = time;
 240                             HD(cmd)->reads_lat[cp->sizeindex][3] += time;
 241                             HD(cmd)->reads_lat[cp->sizeindex][0]++;
 242                         }
 243                     }
 244                 }
 245                 else if (scsi_stat == CHECK_CONDITION
 246                          && cmd->device->type == TYPE_DISK
 247                          && (cmd->sense_buffer[2] & 0xf) == RECOVERED_ERROR)
 248                     result = DID_BUS_BUSY << 16;
 249                 else
 250                     result = DID_OK << 16;
 251                 HD(cmd)->t_timeout[cp->cp_channel][cp->cp_id] = OK;
 252                 break;
 253             case HA_ERR_SEL_TO:         /* Selection Timeout */
 254                 result = DID_BAD_TARGET << 16;  
 255                 break;
 256             case HA_ERR_CMD_TO:         /* Command Timeout   */
 257                 if (HD(cmd)->t_timeout[cp->cp_channel][cp->cp_id] > 1)
 258                     result = DID_ERROR << 16;
 259                 else {
 260                     result = DID_TIME_OUT << 16;
 261                     HD(cmd)->t_timeout[cp->cp_channel][cp->cp_id]++;
 262                 }
 263                 break;
 264             case HA_ERR_RESET:          /* SCSI Bus Reset Received */
 265             case HA_INIT_POWERUP:       /* Initial Controller Power-up */
 266                 if (cmd->device->type != TYPE_TAPE)
 267                     result = DID_BUS_BUSY << 16;
 268                 else
 269                     result = DID_ERROR << 16;
 270                 
 271                 for (i = 0; i < MAXTARGET; i++)
 272                     HD(cmd)->t_state[cp->cp_channel][i] = RESET;
 273                 break;
 274             case HA_UNX_BUSPHASE:       /* Unexpected Bus Phase */
 275             case HA_UNX_BUS_FREE:       /* Unexpected Bus Free */
 276             case HA_BUS_PARITY:         /* Bus Parity Error */
 277             case HA_SCSI_HUNG:          /* SCSI Hung */
 278             case HA_UNX_MSGRJCT:        /* Unexpected Message Reject */
 279             case HA_RESET_STUCK:        /* SCSI Bus Reset Stuck */
 280             case HA_RSENSE_FAIL:        /* Auto Request-Sense Failed */
 281             case HA_PARITY_ERR:         /* Controller Ram Parity */
 282             default:
 283                 result = DID_ERROR << 16;
 284                 break;
 285             }
 286             cmd->result = result | (scsi_stat << 1); 
 287             
 288 #if DBG_INTR2
 289             if (scsi_stat || result || hba_stat || eata_stat != 0x50 
 290                 || cmd->scsi_done == NULL || cmd->device->id == 7) 
 291                 printk("HBA: %d, channel %d, id: %d, lun %d, pid %ld:\n" 
 292                        "eata_stat %#x, hba_stat %#.2x, scsi_stat %#.2x, "
 293                        "sense_key: %#x, result: %#.8x\n", x, 
 294                        cmd->device->channel, cmd->device->id, cmd->device->lun,
 295                        cmd->pid, eata_stat, hba_stat, scsi_stat, 
 296                        cmd->sense_buffer[2] & 0xf, cmd->result); 
 297             DBG(DBG_INTR&&DBG_DELAY,DEL2(800));
 298 #endif
 299             
 300             cp->status = FREE;      /* now we can release the slot  */
 301             cmd->scsi_done(cmd);
 302         }
 303     }
 304     restore_flags(flags);
 305     
 306     return;
 307 }
 308 
 309 inline int eata_send_command(u32 addr, u32 base, u8 command)
     /*  */
 310 {
 311     long loop = R_LIMIT;
 312     
 313     while (inb(base + HA_RAUXSTAT) & HA_ABUSY)
 314         if (--loop == 0)
 315             return(FALSE);
 316 
 317     /* And now the address in nice little byte chunks */
 318     outb( addr & 0x000000ff,        base + HA_WDMAADDR);
 319     outb((addr & 0x0000ff00) >> 8,  base + HA_WDMAADDR + 1);
 320     outb((addr & 0x00ff0000) >> 16, base + HA_WDMAADDR + 2);
 321     outb((addr & 0xff000000) >> 24, base + HA_WDMAADDR + 3);
 322     outb(command, base + HA_WCOMMAND);
 323     return(TRUE);
 324 }
 325 
 326 #if 0 
 327 inline int eata_send_immediate(u32 addr, u32 base, u8 cmnd, u8 cmnd2, u8 id, 
     /*  */
 328                                u8 lun)
 329 {
 330     if(addr){
 331         outb( addr & 0x000000ff,        base + HA_WDMAADDR);
 332         outb((addr & 0x0000ff00) >> 8,  base + HA_WDMAADDR + 1);
 333         outb((addr & 0x00ff0000) >> 16, base + HA_WDMAADDR + 2);
 334         outb((addr & 0xff000000) >> 24, base + HA_WDMAADDR + 3);
 335     } else {
 336         outb(id,  base + HA_WSUBCODE);
 337         outb(lun, base + HA_WSUBLUN);
 338     }
 339     
 340     outb(cmnd2, base + HA_WCOMMAND2);
 341     outb(cmnd,  base + HA_WCOMMAND);
 342     return(TRUE);
 343 }
 344 #endif
 345 
 346 int eata_queue(Scsi_Cmnd * cmd, void (* done) (Scsi_Cmnd *))
     /*  */
 347 {
 348     unsigned int i, x, y;
 349     u32 flags;
 350     hostdata *hd;
 351     struct Scsi_Host *sh;
 352     struct eata_ccb *cp;
 353     struct scatterlist *sl;
 354     
 355     save_flags(flags);
 356     cli();
 357     
 358     queue_counter++;
 359 
 360     hd = HD(cmd);
 361     sh = cmd->host;
 362     
 363     /* check for free slot */
 364     for (y = hd->last_ccb + 1, x = 0; x < sh->can_queue; x++, y++) { 
 365         if (y >= sh->can_queue)
 366             y = 0;
 367         if (hd->ccb[y].status == FREE)
 368             break;
 369     }
 370     
 371     hd->last_ccb = y;
 372 
 373     if (x >= sh->can_queue) { 
 374         uint z;
 375         
 376         printk(KERN_EMERG "eata_dma: run out of queue slots cmdno:%ld"
 377                " intrno: %ld, can_queue: %d, x: %d, y: %d\n", 
 378                queue_counter, int_counter, sh->can_queue, x, y);
 379         printk(KERN_EMERG "Status of queueslots:");
 380         for(z = 0; z < sh->can_queue; z +=2) {
 381             switch(hd->ccb[z].status) {
 382             case FREE:
 383                 printk(KERN_EMERG "Slot %2d is FREE  \t", z);
 384                 break;
 385             case USED:
 386                 printk(KERN_EMERG "Slot %2d is USED  \t", z);
 387                 break;
 388             case LOCKED:
 389                 printk(KERN_EMERG "Slot %2d is LOCKED\t", z);
 390                 break;
 391             default:
 392                 printk(KERN_EMERG "Slot %2d is UNKNOWN\t", z);
 393             }
 394             panic("\nSystem halted.\n");
 395         }
 396     }
 397     cp = &hd->ccb[y];
 398     
 399     memset(cp, 0, sizeof(struct eata_ccb) - sizeof(struct eata_sg_list *));
 400     
 401     cp->status = USED;                  /* claim free slot */
 402     
 403     DBG(DBG_QUEUE, printk("eata_queue pid %ld, target: %x, lun: %x, y %d\n",
 404                           cmd->pid, cmd->target, cmd->lun, y));
 405     DBG(DBG_QUEUE && DBG_DELAY, DEL2(250));
 406     
 407     if(hd->do_latency == TRUE) {
 408         int x, z;
 409         short *sho;
 410         long *lon;
 411         x = 0;  /* just to keep GCC quiet */ 
 412         if (cmd->cmnd[0] == WRITE_6 || cmd->cmnd[0] == WRITE_10 || 
 413             cmd->cmnd[0] == WRITE_12 || cmd->cmnd[0] == READ_6 || 
 414             cmd->cmnd[0] == READ_10 || cmd->cmnd[0] == READ_12) {
 415             
 416             cp->timestamp = jiffies;    /* For latency measurements */
 417             switch(cmd->cmnd[0]) {
 418             case WRITE_6:   
 419             case READ_6:    
 420                 x = cmd->cmnd[4]/2; 
 421                 break;
 422             case WRITE_10:   
 423             case READ_10:
 424                 sho = (short *) &cmd->cmnd[7];
 425                 x = ntohs(*sho)/2;            
 426                 break;
 427             case WRITE_12:   
 428             case READ_12:
 429                 lon = (long *) &cmd->cmnd[6];
 430                 x = ntohl(*lon)/2;            
 431                 break;
 432             }
 433 
 434             for(z = 0; (x > (1 << z)) && (z <= 11); z++) 
 435                 /* nothing */;
 436             cp->sizeindex = z;
 437             if (cmd->cmnd[0] == WRITE_6 || cmd->cmnd[0] == WRITE_10 || 
 438                 cmd->cmnd[0] == WRITE_12){
 439                 cp->rw_latency = TRUE;
 440             }
 441         }
 442     }
 443     cmd->scsi_done = (void *)done;
 444     
 445     switch (cmd->cmnd[0]) {
 446     case CHANGE_DEFINITION: case COMPARE:         case COPY:
 447     case COPY_VERIFY:       case LOG_SELECT:      case MODE_SELECT:
 448     case MODE_SELECT_10:    case SEND_DIAGNOSTIC: case WRITE_BUFFER:
 449     case FORMAT_UNIT:       case REASSIGN_BLOCKS: case RESERVE:
 450     case SEARCH_EQUAL:      case SEARCH_HIGH:     case SEARCH_LOW:
 451     case WRITE_6:           case WRITE_10:        case WRITE_VERIFY:
 452     case UPDATE_BLOCK:      case WRITE_LONG:      case WRITE_SAME:      
 453     case SEARCH_HIGH_12:    case SEARCH_EQUAL_12: case SEARCH_LOW_12:
 454     case WRITE_12:          case WRITE_VERIFY_12: case SET_WINDOW: 
 455     case MEDIUM_SCAN:       case SEND_VOLUME_TAG:            
 456     case 0xea:      /* alternate number for WRITE LONG */
 457         cp->DataOut = TRUE;     /* Output mode */
 458         break;
 459     case TEST_UNIT_READY:
 460     default:
 461         cp->DataIn = TRUE;      /* Input mode  */
 462     }
 463 
 464     /* FIXME: This will will have to be changed once the midlevel driver 
 465      *        allows different HBA IDs on every channel.
 466      */
 467     if (cmd->target == sh->this_id) 
 468         cp->Interpret = TRUE;   /* Interpret command */
 469 
 470     if (cmd->use_sg) {
 471         cp->scatter = TRUE;     /* SG mode     */
 472         if (cp->sg_list == NULL) {
 473             cp->sg_list = kmalloc(sh->sg_tablesize * sizeof(struct eata_sg_list),
 474                                   GFP_ATOMIC | GFP_DMA);
 475         }
 476         if (cp->sg_list == NULL)
 477             panic("eata_dma: Run out of DMA memory for SG lists !\n");
 478         cp->cp_dataDMA = htonl(virt_to_bus(cp->sg_list)); 
 479         
 480         cp->cp_datalen = htonl(cmd->use_sg * sizeof(struct eata_sg_list));
 481         sl=(struct scatterlist *)cmd->request_buffer;
 482         for(i = 0; i < cmd->use_sg; i++, sl++){
 483             cp->sg_list[i].data = htonl(virt_to_bus(sl->address));
 484             cp->sg_list[i].len = htonl((u32) sl->length);
 485         }
 486     } else {
 487         cp->scatter = FALSE;
 488         cp->cp_datalen = htonl(cmd->request_bufflen);
 489         cp->cp_dataDMA = htonl(virt_to_bus(cmd->request_buffer));
 490     }
 491     
 492     cp->Auto_Req_Sen = TRUE;
 493     cp->cp_reqDMA = htonl(virt_to_bus(cmd->sense_buffer));
 494     cp->reqlen = sizeof(cmd->sense_buffer);
 495     
 496     cp->cp_id = cmd->target;
 497     cp->cp_channel = cmd->channel;
 498     cp->cp_lun = cmd->lun;
 499     cp->cp_dispri = TRUE;
 500     cp->cp_identify = TRUE;
 501     memcpy(cp->cp_cdb, cmd->cmnd, cmd->cmd_len);
 502     
 503     cp->cp_statDMA = htonl(virt_to_bus(&(hd->sp)));
 504     
 505     cp->cp_viraddr = cp; /* This will be passed thru, so we don't need to 
 506                           * convert it */
 507     cp->cmd = cmd;
 508     cmd->host_scribble = (char *)&hd->ccb[y];   
 509     
 510     if(eata_send_command((u32) cp, (u32) sh->base, EATA_CMD_DMA_SEND_CP) == FALSE) {
 511         cmd->result = DID_BUS_BUSY << 16;
 512         DBG(DBG_QUEUE && DBG_ABNORM, 
 513             printk("eata_queue target %d, pid %ld, HBA busy, "
 514                    "returning DID_BUS_BUSY\n",cmd->target, cmd->pid));
 515         done(cmd);
 516         cp->status = FREE;    
 517         restore_flags(flags);
 518         return(0);
 519     }
 520     DBG(DBG_QUEUE, printk("Queued base %#.4x pid: %ld target: %x lun: %x "
 521                          "slot %d irq %d\n", (s32)sh->base, cmd->pid, 
 522                          cmd->target, cmd->lun, y, sh->irq));
 523     DBG(DBG_QUEUE && DBG_DELAY, DEL2(200));
 524     restore_flags(flags);
 525     return(0);
 526 }
 527 
 528 
 529 int eata_abort(Scsi_Cmnd * cmd)
     /*  */
 530 {
 531     ulong loop = R_LIMIT;
 532     ulong flags;
 533 
 534     save_flags(flags);
 535     cli();
 536 
 537     DBG(DBG_ABNORM, printk("eata_abort called pid: %ld target: %x lun: %x"
 538                            " reason %x\n", cmd->pid, cmd->target, cmd->lun, 
 539                            cmd->abort_reason));
 540     DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 541 
 542     while (inb((u32)(cmd->host->base) + HA_RAUXSTAT) & HA_ABUSY) {
 543         if (--loop == 0) {
 544             printk("eata_dma: abort, timeout error.\n");
 545             restore_flags(flags);
 546             DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 547             return (SCSI_ABORT_ERROR);
 548         }
 549     }
 550     if (CD(cmd)->status == RESET) {
 551         restore_flags(flags);
 552         printk("eata_dma: abort, command reset error.\n");
 553         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 554         return (SCSI_ABORT_ERROR);
 555     }
 556     if (CD(cmd)->status == LOCKED) {
 557         restore_flags(flags);
 558         DBG(DBG_ABNORM, printk("eata_dma: abort, queue slot locked.\n"));
 559         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 560         return (SCSI_ABORT_NOT_RUNNING);
 561     }
 562     if (CD(cmd)->status == USED) {
 563         DBG(DBG_ABNORM, printk("Returning: SCSI_ABORT_BUSY\n"));
 564         restore_flags(flags);
 565         return (SCSI_ABORT_BUSY);  /* SNOOZE */ 
 566     }
 567     if (CD(cmd)->status == FREE) {
 568         DBG(DBG_ABNORM, printk("Returning: SCSI_ABORT_NOT_RUNNING\n")); 
 569         restore_flags(flags);
 570         return (SCSI_ABORT_NOT_RUNNING);
 571     }
 572     restore_flags(flags);
 573     panic("eata_dma: abort: invalid slot status\n");
 574 }
 575 
 576 int eata_reset(Scsi_Cmnd * cmd)
     /*  */
 577 {
 578     ushort x, z; 
 579     ulong time, limit = 0;
 580     ulong loop = R_LIMIT;
 581     ulong flags;
 582     unchar success = FALSE;
 583     Scsi_Cmnd *sp; 
 584     
 585     save_flags(flags);
 586     cli();
 587     
 588     DBG(DBG_ABNORM, printk("eata_reset called pid:%ld target: %x lun: %x"
 589                            " reason %x\n", cmd->pid, cmd->target, cmd->lun, 
 590                            cmd->abort_reason));
 591         
 592     if (HD(cmd)->state == RESET) {
 593         printk("eata_reset: exit, already in reset.\n");
 594         restore_flags(flags);
 595         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 596         return (SCSI_RESET_ERROR);
 597     }
 598     
 599     while (inb((u32)(cmd->host->base) + HA_RAUXSTAT) & HA_ABUSY)
 600         if (--loop == 0) {
 601             printk("eata_reset: exit, timeout error.\n");
 602             restore_flags(flags);
 603             DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 604             return (SCSI_RESET_ERROR);
 605         }
 606  
 607     for (x = 0; x < MAXCHANNEL; x++) {
 608         for (z = 0; z < MAXTARGET; z++) {
 609             HD(cmd)->t_state[x][z] = RESET;
 610             HD(cmd)->t_timeout[x][z] = NO_TIMEOUT;
 611         }
 612     }
 613 
 614     for (x = 0; x < cmd->host->can_queue; x++) {
 615         if (HD(cmd)->ccb[x].status == FREE)
 616             continue;
 617         
 618         if (HD(cmd)->ccb[x].status == LOCKED) {
 619             HD(cmd)->ccb[x].status = FREE;
 620             printk("eata_reset: locked slot %d forced free.\n", x);
 621             DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 622             continue;
 623         }
 624         sp = HD(cmd)->ccb[x].cmd;
 625         HD(cmd)->ccb[x].status = RESET;
 626         printk("eata_reset: slot %d in reset, pid %ld.\n", x, sp->pid);
 627         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 628         
 629         if (sp == NULL)
 630             panic("eata_reset: slot %d, sp==NULL.\n", x);
 631         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 632         
 633         if (sp == cmd)
 634             success = TRUE;
 635     }
 636     
 637     /* hard reset the HBA  */
 638     inb((u32) (cmd->host->base) + HA_RSTATUS);  /* This might cause trouble */
 639     eata_send_command(0, (u32) cmd->host->base, EATA_CMD_RESET);
 640     
 641     DBG(DBG_ABNORM, printk("eata_reset: board reset done, enabling interrupts.\n"));
 642     HD(cmd)->state = RESET;
 643     
 644     restore_flags(flags);
 645     
 646     time = jiffies;
 647     while (jiffies < (time + (3 * HZ)) || limit++ < 10000000)
 648         /* As time goes by... */;
 649     
 650     save_flags(flags);
 651     cli();
 652     
 653     DBG(DBG_ABNORM, printk("eata_reset: interrupts disabled, loops %ld.\n", 
 654                            limit));
 655     DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 656     
 657     for (x = 0; x < cmd->host->can_queue; x++) {
 658         
 659         /* Skip slots already set free by interrupt */
 660         if (HD(cmd)->ccb[x].status != RESET)
 661             continue;
 662         
 663         sp = HD(cmd)->ccb[x].cmd;
 664         sp->result = DID_RESET << 16;
 665         
 666         /* This mailbox is still waiting for its interrupt */
 667         HD(cmd)->ccb[x].status = LOCKED;
 668         
 669         printk("eata_reset: slot %d locked, DID_RESET, pid %ld done.\n",
 670                x, sp->pid);
 671         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 672         restore_flags(flags);
 673         sp->scsi_done(sp);
 674         cli();
 675     }
 676     
 677     HD(cmd)->state = FALSE;
 678     restore_flags(flags);
 679     
 680     if (success) {
 681         DBG(DBG_ABNORM, printk("eata_reset: exit, success.\n"));
 682         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 683         return (SCSI_RESET_SUCCESS);
 684     } else {
 685         DBG(DBG_ABNORM, printk("eata_reset: exit, wakeup.\n"));
 686         DBG(DBG_ABNORM && DBG_DELAY, DEL2(500));
 687         return (SCSI_RESET_PUNT);
 688     }
 689 }
 690 
 691 char * get_board_data(u32 base, u32 irq, u32 id)
     /*  */
 692 {
 693     struct eata_ccb *cp;
 694     struct eata_sp  *sp;
 695     static char *buff;
 696     ulong i;
 697     ulong limit = 0;
 698 
 699     cp = (struct eata_ccb *) scsi_init_malloc(sizeof(struct eata_ccb),
 700                                               GFP_ATOMIC | GFP_DMA);
 701     sp = (struct eata_sp *) scsi_init_malloc(sizeof(struct eata_sp), 
 702                                              GFP_ATOMIC | GFP_DMA);
 703 
 704     buff = dma_scratch;
 705  
 706     memset(cp, 0, sizeof(struct eata_ccb));
 707     memset(sp, 0, sizeof(struct eata_sp));
 708     memset(buff, 0, 256);
 709 
 710     cp->DataIn = TRUE;     
 711     cp->Interpret = TRUE;   /* Interpret command */
 712     cp->cp_dispri = TRUE;
 713     cp->cp_identify = TRUE;
 714  
 715     cp->cp_datalen = htonl(56);  
 716     cp->cp_dataDMA = htonl(virt_to_bus(buff));
 717     cp->cp_statDMA = htonl(virt_to_bus(sp));
 718     cp->cp_viraddr = cp;
 719     
 720     cp->cp_id = id;
 721     cp->cp_lun = 0;
 722 
 723     cp->cp_cdb[0] = INQUIRY;
 724     cp->cp_cdb[1] = 0;
 725     cp->cp_cdb[2] = 0;
 726     cp->cp_cdb[3] = 0;
 727     cp->cp_cdb[4] = 56;
 728     cp->cp_cdb[5] = 0;
 729 
 730     fake_int_base = (struct eata_register *) base;
 731     fake_int_result = FALSE;
 732     fake_int_happened = FALSE;
 733 
 734     eata_send_command((u32) cp, (u32) base, EATA_CMD_DMA_SEND_CP);
 735     
 736     i = jiffies + (3 * HZ);
 737     while (fake_int_happened == FALSE && jiffies <= i) 
 738         barrier();
 739     
 740     DBG(DBG_INTR3, printk("fake_int_result: %#x hbastat %#x scsistat %#x,"
 741                           " buff %p sp %p\n",
 742                           fake_int_result, (u32) (sp->hba_stat /*& 0x7f*/), 
 743                           (u32) sp->scsi_stat, buff, sp));
 744 
 745     scsi_init_free((void *)cp, sizeof(struct eata_ccb));
 746     scsi_init_free((void *)sp, sizeof(struct eata_sp));
 747     
 748     if ((fake_int_result & HA_SERROR) || jiffies > i){
 749         /* hard reset the HBA  */
 750         inb((u32) (base) + HA_RSTATUS);
 751         eata_send_command(0, base, EATA_CMD_RESET);
 752         i = jiffies;
 753         while (jiffies < (i + (3 * HZ)) && limit++ < 10000000) 
 754             barrier();
 755         return (NULL);
 756     } else
 757         return (buff);
 758 }
 759     
 760 int check_blink_state(long base)
     /*  */
 761 {
 762     ushort loops = 10;
 763     u32 blinkindicator;
 764     u32 state = 0x12345678;
 765     u32 oldstate = 0;
 766 
 767     blinkindicator = htonl(0x54504442);
 768     while ((loops--) && (state != oldstate)) {
 769         oldstate = state;
 770         state = inl((uint) base + 1);
 771     }
 772 
 773     DBG(DBG_BLINK, printk("Did Blink check. Status: %d\n",
 774               (state == oldstate) && (state == blinkindicator)));
 775 
 776     if ((state == oldstate) && (state == blinkindicator))
 777         return(TRUE);
 778     else
 779         return (FALSE);
 780 }
 781 
 782 int get_conf_PIO(u32 base, struct get_conf *buf)
     /*  */
 783 {
 784     ulong loop = R_LIMIT;
 785     u16 *p;
 786 
 787     if(check_region(base, 9)) 
 788         return (FALSE);
 789      
 790     memset(buf, 0, sizeof(struct get_conf));
 791 
 792     while (inb(base + HA_RSTATUS) & HA_SBUSY)
 793         if (--loop == 0) 
 794             return (FALSE);
 795        
 796     DBG(DBG_PIO && DBG_PROBE,
 797         printk("Issuing PIO READ CONFIG to HBA at %#x\n", base));
 798     eata_send_command(0, base, EATA_CMD_PIO_READ_CONFIG);
 799 
 800     loop = R_LIMIT;
 801     for (p = (u16 *) buf; 
 802          (long)p <= ((long)buf + (sizeof(struct get_conf) / 2)); p++) {
 803         while (!(inb(base + HA_RSTATUS) & HA_SDRQ))
 804             if (--loop == 0)
 805                 return (FALSE);
 806 
 807         loop = R_LIMIT;
 808         *p = inw(base + HA_RDATA);
 809     }
 810 
 811     if (!(inb(base + HA_RSTATUS) & HA_SERROR)) {            /* Error ? */
 812         if (htonl(EATA_SIGNATURE) == buf->signature) {
 813             DBG(DBG_PIO&&DBG_PROBE, printk("EATA Controller found at %x "
 814                                            "EATA Level: %x\n", (uint) base, 
 815                                            (uint) (buf->version)));
 816             
 817             while (inb(base + HA_RSTATUS) & HA_SDRQ) 
 818                 inw(base + HA_RDATA);
 819             return (TRUE);
 820         } 
 821     } else {
 822         DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during transfer "
 823                   "for HBA at %lx\n", (long)base));
 824     }
 825     return (FALSE);
 826 }
 827 
 828 void print_config(struct get_conf *gc)
     /*  */
 829 {
 830     printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d DMAS:%d\n",
 831            (u32) ntohl(gc->len), gc->version,
 832            gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support,
 833            gc->DMA_support);
 834     printk("DMAV:%d HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n",
 835            gc->DMA_valid, gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2],
 836            gc->scsi_id[1], ntohs(gc->queuesiz), ntohs(gc->SGsiz), gc->SECOND);
 837     printk("IRQ:%d IRQT:%d DMAC:%d FORCADR:%d SG_64K:%d SG_UAE:%d MID:%d "
 838            "MCH:%d MLUN:%d\n",
 839            gc->IRQ, gc->IRQ_TR, (8 - gc->DMA_channel) & 7, gc->FORCADR, 
 840            gc->SG_64K, gc->SG_UAE, gc->MAX_ID, gc->MAX_CHAN, gc->MAX_LUN); 
 841     printk("RIDQ:%d PCI:%d EISA:%d\n",
 842            gc->ID_qest, gc->is_PCI, gc->is_EISA);
 843     DBG(DPT_DEBUG, DELAY(14));
 844 }
 845 
 846 short register_HBA(u32 base, struct get_conf *gc, Scsi_Host_Template * tpnt, 
     /*  */
 847                    u8 bustype)
 848 {
 849     ulong size = 0;
 850     unchar dma_channel = 0;
 851     char *buff = 0;
 852     unchar bugs = 0;
 853     struct Scsi_Host *sh;
 854     hostdata *hd;
 855     int x;
 856     
 857     
 858     DBG(DBG_REGISTER, print_config(gc));
 859 
 860     if (gc->DMA_support == FALSE) {
 861         printk("The EATA HBA at %#.4x does not support DMA.\n" 
 862                "Please use the EATA-PIO driver.\n", base);
 863         return (FALSE);
 864     }
 865     if(gc->HAA_valid == FALSE || ntohl(gc->len) < 0x22) 
 866         gc->MAX_CHAN = 0;
 867     
 868     if (reg_IRQ[gc->IRQ] == FALSE) {    /* Interrupt already registered ? */
 869         if (!request_irq(gc->IRQ, (void *) eata_fake_int_handler, SA_INTERRUPT,
 870                          "eata_dma", NULL)){
 871             reg_IRQ[gc->IRQ]++;
 872             if (!gc->IRQ_TR)
 873                 reg_IRQL[gc->IRQ] = TRUE;   /* IRQ is edge triggered */
 874         } else {
 875             printk("Couldn't allocate IRQ %d, Sorry.", gc->IRQ);
 876             return (FALSE);
 877         }
 878     } else {            /* More than one HBA on this IRQ */
 879         if (reg_IRQL[gc->IRQ] == TRUE) {
 880             printk("Can't support more than one HBA on this IRQ,\n"
 881                    "  if the IRQ is edge triggered. Sorry.\n");
 882             return (FALSE);
 883         } else
 884             reg_IRQ[gc->IRQ]++;
 885     }
 886     
 887     /* if gc->DMA_valid it must be an ISA HBA and we have to register it */
 888     dma_channel = BUSMASTER;
 889     if (gc->DMA_valid) {
 890         if (request_dma(dma_channel = (8 - gc->DMA_channel) & 7, "eata_dma")) {
 891             printk("Unable to allocate DMA channel %d for ISA HBA at %#.4x.\n",
 892                    dma_channel, base);
 893             reg_IRQ[gc->IRQ]--;
 894             if (reg_IRQ[gc->IRQ] == 0)
 895                 free_irq(gc->IRQ, NULL);
 896             if (gc->IRQ_TR == FALSE)
 897                 reg_IRQL[gc->IRQ] = FALSE; 
 898             return (FALSE);
 899         }
 900     }
 901  
 902 #if !(NEWSTUFF)
 903     if (bustype != IS_EISA && bustype != IS_ISA)
 904 #endif
 905         buff = get_board_data(base, gc->IRQ, gc->scsi_id[3]);
 906 
 907     if (buff == NULL) {
 908 #if !(NEWSTUFF)
 909         if (bustype == IS_EISA || bustype == IS_ISA) {
 910             bugs = bugs || BROKEN_INQUIRY;
 911         } else {
 912 #endif
 913             if (gc->DMA_support == FALSE)
 914                 printk("HBA at %#.4x doesn't support DMA. Sorry\n", base);
 915             else
 916                 printk("HBA at %#.4x does not react on INQUIRY. Sorry.\n", 
 917                        base);
 918             if (gc->DMA_valid) 
 919                 free_dma(dma_channel);
 920             reg_IRQ[gc->IRQ]--;
 921             if (reg_IRQ[gc->IRQ] == 0)
 922                 free_irq(gc->IRQ, NULL);
 923             if (gc->IRQ_TR == FALSE)
 924                 reg_IRQL[gc->IRQ] = FALSE; 
 925             return (FALSE);
 926 #if !(NEWSTUFF)
 927         }
 928 #endif
 929     }
 930     
 931     if (gc->DMA_support == FALSE && buff != NULL)  
 932         printk("HBA %.12sat %#.4x doesn't set the DMA_support flag correctly.\n",
 933                &buff[16], base);
 934     
 935     request_region(base, 9, "eata_dma"); /* We already checked the 
 936                                           * availability, so this
 937                                           * should not fail.
 938                                           */
 939     
 940     if(ntohs(gc->queuesiz) == 0) {
 941         gc->queuesiz = ntohs(64);
 942         printk("Warning: Queue size has to be corrected. Assuming 64 queueslots\n"
 943                "         This might be a PM2012B with a defective Firmware\n");
 944     }
 945 
 946     size = sizeof(hostdata) + ((sizeof(struct eata_ccb) + sizeof(long)) 
 947                                * ntohs(gc->queuesiz));
 948 
 949     DBG(DBG_REGISTER, printk("scsi_register size: %ld\n", size));
 950 
 951     sh = scsi_register(tpnt, size);
 952     
 953     if(sh == NULL) {
 954         if (gc->DMA_valid) 
 955             free_dma(dma_channel);
 956         
 957         reg_IRQ[gc->IRQ]--;
 958         if (reg_IRQ[gc->IRQ] == 0)
 959             free_irq(gc->IRQ, NULL);
 960         if (gc->IRQ_TR == FALSE)
 961             reg_IRQL[gc->IRQ] = FALSE; 
 962         return (FALSE);
 963     }
 964     
 965     hd = SD(sh);                   
 966     
 967     memset(hd->ccb, 0, sizeof(struct eata_ccb) * ntohs(gc->queuesiz));
 968     memset(hd->reads, 0, sizeof(u32) * 26); 
 969 
 970     hd->broken_INQUIRY = (bugs & BROKEN_INQUIRY);
 971 
 972     if(hd->broken_INQUIRY == TRUE) {
 973         strcpy(SD(sh)->vendor, "DPT");
 974         strcpy(SD(sh)->name, "??????????");
 975         strcpy(SD(sh)->revision, "???.?");
 976     } else {    
 977         strncpy(SD(sh)->vendor, &buff[8], 8);
 978         SD(sh)->vendor[8] = 0;
 979         strncpy(SD(sh)->name, &buff[16], 17);
 980         SD(sh)->name[17] = 0;
 981         SD(sh)->revision[0] = buff[32];
 982         SD(sh)->revision[1] = buff[33];
 983         SD(sh)->revision[2] = buff[34];
 984         SD(sh)->revision[3] = '.';
 985         SD(sh)->revision[4] = buff[35];
 986         SD(sh)->revision[5] = 0;
 987     }
 988 
 989     switch (ntohl(gc->len)) {
 990     case 0x1c:
 991         SD(sh)->EATA_revision = 'a';
 992         break;
 993     case 0x1e:
 994         SD(sh)->EATA_revision = 'b';
 995         break;
 996     case 0x22:
 997         SD(sh)->EATA_revision = 'c';
 998         break;
 999     case 0x24:
1000         SD(sh)->EATA_revision = 'z';            
1001     default:
1002         SD(sh)->EATA_revision = '?';
1003     }
1004 
1005     if(ntohl(gc->len) >= 0x22) {
1006         if (gc->is_PCI == TRUE)
1007             hd->bustype = IS_PCI;
1008         else if (gc->is_EISA == TRUE)
1009             hd->bustype = IS_EISA;
1010         else
1011             hd->bustype = IS_ISA;
1012     } else if(hd->broken_INQUIRY == FALSE) {
1013         if (buff[21] == '4')
1014             hd->bustype = IS_PCI;
1015         else if (buff[21] == '2')
1016             hd->bustype = IS_EISA;
1017         else
1018             hd->bustype = IS_ISA;
1019     } else 
1020         hd->bustype = bustype;
1021     
1022     if(ntohl(gc->len) >= 0x22) {
1023         sh->max_id = gc->MAX_ID + 1;
1024         sh->max_lun = gc->MAX_LUN + 1;
1025     } else {
1026         sh->max_id = 8;
1027         sh->max_lun = 8;
1028     }
1029 
1030     hd->channel = gc->MAX_CHAN;     
1031     sh->max_channel = gc->MAX_CHAN; 
1032     sh->unique_id = base;
1033     sh->base = (char *) base;
1034     sh->io_port = base;
1035     sh->n_io_port = 9;
1036     sh->irq = gc->IRQ;
1037     sh->dma_channel = dma_channel;
1038     
1039     /* FIXME:
1040      * SCSI midlevel code should support different HBA ids on every channel
1041      */
1042     sh->this_id = gc->scsi_id[3];
1043     sh->can_queue = ntohs(gc->queuesiz);
1044     
1045     if (gc->OCS_enabled == TRUE) {
1046         if(hd->bustype != IS_ISA)
1047             sh->cmd_per_lun = sh->can_queue/C_P_L_DIV; 
1048         else
1049             sh->cmd_per_lun = 8; /* We artificially limit this to conserve 
1050                                   * memory, which would be needed for ISA 
1051                                   * bounce buffers */
1052     } else 
1053         sh->cmd_per_lun = 1;
1054     
1055     /* FIXME:
1056      * SG should be allocated more dynamically 
1057      */
1058     /*
1059      * If we are using a ISA board, we can't use extended SG,
1060      * because we would need exessive amounts of memory for
1061      * bounce buffers.
1062      */
1063     if (gc->SG_64K == TRUE && ntohs(gc->SGsiz) == 64 && hd->bustype != IS_ISA){
1064         sh->sg_tablesize = SG_SIZE_BIG;
1065         sh->use_clustering = FALSE;
1066     } else {
1067         sh->sg_tablesize = ntohs(gc->SGsiz);
1068         sh->use_clustering = TRUE;
1069         if (sh->sg_tablesize > SG_SIZE || sh->sg_tablesize == 0) {
1070             sh->sg_tablesize = SG_SIZE;
1071             if (ntohs(gc->SGsiz) == 0)
1072                 printk("Warning: SG size had to be corrected.\n"
1073                        "This might be a PM2012 with a defective Firmware\n");
1074         }
1075     }
1076 
1077     if (gc->SECOND)
1078         hd->primary = FALSE;
1079     else
1080         hd->primary = TRUE;
1081     
1082     sh->wish_block = FALSE;        
1083     
1084     if (hd->bustype != IS_ISA) {
1085         sh->unchecked_isa_dma = FALSE;
1086     } else {
1087         sh->unchecked_isa_dma = TRUE;   /* We're doing ISA DMA */
1088     }
1089     
1090     for(x = 0; x <= 11; x++){            /* Initialize min. latency */
1091         hd->writes_lat[x][1] = 0xffffffff;
1092         hd->reads_lat[x][1] = 0xffffffff;
1093     }
1094 
1095     hd->next = NULL;    /* build a linked list of all HBAs */
1096     hd->prev = last_HBA;
1097     if(hd->prev != NULL)
1098         SD(hd->prev)->next = sh;
1099     last_HBA = sh;
1100     if (first_HBA == NULL)
1101         first_HBA = sh;
1102     registered_HBAs++;
1103     
1104     return (TRUE);
1105 }
1106 
1107 
1108 void find_EISA(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
1109 {
1110     u32 base;
1111     int i;
1112     
1113 #if CHECKPAL
1114     u8 pal1, pal2, pal3;
1115 #endif
1116     
1117     for (i = 0; i < MAXEISA; i++) {
1118         if (EISAbases[i] == TRUE) { /* Still a possibility ?          */
1119             
1120             base = 0x1c88 + (i * 0x1000);
1121 #if CHECKPAL
1122             pal1 = inb((u16)base - 8);
1123             pal2 = inb((u16)base - 7);
1124             pal3 = inb((u16)base - 6);
1125             
1126             if (((pal1 == DPT_ID1) && (pal2 == DPT_ID2)) ||
1127                 ((pal1 == NEC_ID1) && (pal2 == NEC_ID2) && (pal3 == NEC_ID3))||
1128                 ((pal1 == ATT_ID1) && (pal2 == ATT_ID2) && (pal3 == ATT_ID3))){
1129                 DBG(DBG_PROBE, printk("EISA EATA id tags found: %x %x %x \n",
1130                                       (int)pal1, (int)pal2, (int)pal3));
1131 #endif
1132                 if (get_conf_PIO(base, buf) == TRUE) {
1133                     if (buf->IRQ) {  
1134                         DBG(DBG_EISA, printk("Registering EISA HBA\n"));
1135                         register_HBA(base, buf, tpnt, IS_EISA);
1136                     } else
1137                         printk("eata_dma: No valid IRQ. HBA removed from list\n");
1138                 } else {
1139                     if (check_blink_state(base)) 
1140                         printk("HBA is in BLINK state. Consult your HBAs "
1141                                "Manual to correct this.\n");
1142                 } 
1143                 /* Nothing found here so we take it from the list */
1144                 EISAbases[i] = 0;  
1145 #if CHECKPAL
1146             } 
1147 #endif
1148         }
1149     }
1150     return; 
1151 }
1152 
1153 void find_ISA(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
1154 {
1155     int i;
1156     
1157     for (i = 0; i < MAXISA; i++) {  
1158         if (ISAbases[i]) {  
1159             if (get_conf_PIO(ISAbases[i],buf) == TRUE){
1160                 DBG(DBG_ISA, printk("Registering ISA HBA\n"));
1161                 register_HBA(ISAbases[i], buf, tpnt, IS_ISA);
1162             } else {
1163                 if (check_blink_state(ISAbases[i])) 
1164                     printk("HBA is in BLINK state. Consult your HBAs "
1165                            "Manual to correct this.\n");
1166             }
1167             ISAbases[i] = 0;
1168         }
1169     }
1170     return;
1171 }
1172 
1173 void find_PCI(struct get_conf *buf, Scsi_Host_Template * tpnt)
     /*  */
1174 {
1175 
1176 #ifndef CONFIG_PCI
1177     printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n");
1178 #else
1179     
1180     u8 pci_bus, pci_device_fn;
1181     static s16 pci_index = 0;   /* Device index to PCI BIOS calls */
1182     u32 base = 0;
1183     u16 com_adr;
1184     u16 rev_device;
1185     u32 error, i, x;
1186     u8 pal1, pal2, pal3;
1187 
1188     if (pcibios_present()) {
1189         for (i = 0; i <= MAXPCI; ++i, ++pci_index) {
1190             if (pcibios_find_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, 
1191                                     pci_index, &pci_bus, &pci_device_fn))
1192                 break;
1193             DBG(DBG_PROBE && DBG_PCI, 
1194                 printk("eata_dma: find_PCI, HBA at bus %d, device %d,"
1195                        " function %d, index %d\n", (s32)pci_bus, 
1196                        (s32)((pci_device_fn & 0xf8) >> 3),
1197                        (s32)(pci_device_fn & 7), pci_index));
1198             
1199             if (!(error = pcibios_read_config_word(pci_bus, pci_device_fn, 
1200                                        PCI_CLASS_DEVICE, &rev_device))) {
1201                 if (rev_device == PCI_CLASS_STORAGE_SCSI) {
1202                     if (!(error = pcibios_read_config_word(pci_bus, 
1203                                                pci_device_fn, PCI_COMMAND, 
1204                                                (u16 *) & com_adr))) {
1205                         if (!((com_adr & PCI_COMMAND_IO) && 
1206                               (com_adr & PCI_COMMAND_MASTER))) {
1207                             printk("eata_dma: find_PCI, HBA has IO or BUSMASTER mode disabled\n");
1208                             continue;
1209                         }
1210                     } else
1211                         printk("eata_dma: find_PCI, error %x while reading "
1212                                "PCI_COMMAND\n", error);
1213                 } else
1214                     printk("eata_dma: find_PCI, DEVICECLASSID %x didn't match\n", 
1215                            rev_device);
1216             } else {
1217                 printk("eata_dma: find_PCI, error %x while reading PCI_CLASS_BASE\n", 
1218                        error);
1219                 continue;
1220             }
1221             
1222             if (!(error = pcibios_read_config_dword(pci_bus, pci_device_fn,
1223                                        PCI_BASE_ADDRESS_0, (int *) &base))){
1224                 
1225                 /* Check if the address is valid */
1226                 if (base & 0x01) {
1227                     base &= 0xfffffffe;
1228                     /* EISA tag there ? */
1229                     pal1 = inb(base);
1230                     pal2 = inb(base + 1);
1231                     pal3 = inb(base + 2);
1232                     if (((pal1 == DPT_ID1) && (pal2 == DPT_ID2)) ||
1233                         ((pal1 == NEC_ID1) && (pal2 == NEC_ID2) && 
1234                          (pal3 == NEC_ID3)) ||
1235                         ((pal1 == ATT_ID1) && (pal2 == ATT_ID2) && 
1236                          (pal3 == ATT_ID3)))
1237                         base += 0x08;
1238                     else
1239                         base += 0x10;   /* Now, THIS is the real address */
1240 
1241                     if (base != 0x1f8) {
1242                         /* We didn't find it in the primary search */
1243                         if (get_conf_PIO(base, buf) == TRUE) {
1244 
1245                             /* OK. We made it till here, so we can go now  
1246                              * and register it. We  only have to check and 
1247                              * eventually remove it from the EISA and ISA list 
1248                              */
1249                             DBG(DBG_PCI, printk("Registering PCI HBA\n"));
1250                             register_HBA(base, buf, tpnt, IS_PCI);
1251                             
1252                             if (base < 0x1000) {
1253                                 for (x = 0; x < MAXISA; ++x) {
1254                                     if (ISAbases[x] == base) {
1255                                         ISAbases[x] = 0;
1256                                         break;
1257                                     }
1258                                 }
1259                             } else if ((base & 0x0fff) == 0x0c88) 
1260                                 EISAbases[(base >> 12) & 0x0f] = 0;
1261                             continue;  /* break; */
1262                         } else if (check_blink_state(base) == TRUE) {
1263                             printk("eata_dma: HBA is in BLINK state.\n"
1264                                    "Consult your HBAs Manual to correct this.\n");
1265                         }
1266                     }
1267                 }
1268             } else {
1269                 printk("eata_dma: error %x while reading "
1270                        "PCI_BASE_ADDRESS_0\n", error);
1271             }
1272         }
1273     } else {
1274         printk("eata_dma: No BIOS32 extensions present. This driver release "
1275                "still depends on it.\n"
1276                "          Skipping scan for PCI HBAs. \n");
1277     }
1278 #endif /* #ifndef CONFIG_PCI */
1279     return;
1280 }
1281 
1282 int eata_detect(Scsi_Host_Template * tpnt)
     /*  */
1283 {
1284     struct Scsi_Host *HBA_ptr;
1285     struct get_conf gc;
1286     int i;
1287     
1288     DBG((DBG_PROBE && DBG_DELAY) || DPT_DEBUG,
1289         printk("Using lots of delays to let you read the debugging output\n"));
1290 
1291     tpnt->proc_dir = &proc_scsi_eata_dma;
1292 
1293     status = scsi_init_malloc(512, GFP_ATOMIC | GFP_DMA);
1294     dma_scratch = scsi_init_malloc(512, GFP_ATOMIC | GFP_DMA);
1295 
1296     if(status == NULL || dma_scratch == NULL) {
1297         printk("eata_dma: can't allocate enough memory to probe for hosts !\n");
1298         return(0);
1299     }
1300 
1301     find_PCI(&gc, tpnt);
1302     
1303     find_EISA(&gc, tpnt);
1304     
1305     find_ISA(&gc, tpnt);
1306     
1307     for (i = 0; i <= MAXIRQ; i++) { /* Now that we know what we have, we     */
1308         if (reg_IRQ[i]){            /* exchange the interrupt handler which  */
1309             free_irq(i, NULL);      /* we used for probing with the real one */
1310             request_irq(i, (void *)(eata_int_handler), SA_INTERRUPT, "eata_dma", NULL);
1311         }
1312     }
1313     HBA_ptr = first_HBA;
1314     
1315     if (registered_HBAs != 0) {
1316         printk("EATA (Extended Attachment) driver version: %d.%d%s\n"
1317                "developed in co-operation with DPT\n"             
1318                "(c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de\n",
1319                VER_MAJOR, VER_MINOR, VER_SUB);
1320         printk("Registered HBAs:");
1321         printk("\nHBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: DMA: Ch: "
1322                "ID: Pr: QS: SG: CPL:\n");
1323         for (i = 1; i <= registered_HBAs; i++) {
1324             printk("scsi%-2d: %.10s v%s 2.0%c  %s %#.4x   %2d",
1325                    HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision,
1326                    SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P')? 
1327                    "PCI ":(SD(HBA_ptr)->bustype == 'E')?"EISA":"ISA ",
1328                    (u32) HBA_ptr->base, HBA_ptr->irq);
1329             if(HBA_ptr->dma_channel != BUSMASTER)
1330                 printk("   %2x ", HBA_ptr->dma_channel);
1331             else
1332                 printk("  %s", "BMST");
1333             printk("  %d   %d   %c  %2d  %2d   %2d\n", SD(HBA_ptr)->channel, 
1334                    HBA_ptr->this_id, (SD(HBA_ptr)->primary == TRUE)?'Y':'N', 
1335                    HBA_ptr->can_queue, HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun);
1336             HBA_ptr = SD(HBA_ptr)->next;
1337         }
1338     } else {
1339         scsi_init_free((void *)status, 512);
1340     }
1341 
1342     scsi_init_free((void *)dma_scratch, 512);
1343 
1344     DBG(DPT_DEBUG, DELAY(12));
1345 
1346     return(registered_HBAs);
1347 }
1348 
1349 #ifdef MODULE
1350 /* Eventually this will go into an include file, but this will be later */
1351 Scsi_Host_Template driver_template = EATA_DMA;
1352 #include "scsi_module.c"
1353 #endif
1354 
1355 /*
1356  * Overrides for Emacs so that we almost follow Linus's tabbing style.
1357  * Emacs will notice this stuff at the end of the file and automatically
1358  * adjust the settings for this buffer only.  This must remain at the end
1359  * of the file.
1360  * ---------------------------------------------------------------------------
1361  * Local variables:
1362  * c-indent-level: 4
1363  * c-brace-imaginary-offset: 0
1364  * c-brace-offset: -4
1365  * c-argdecl-indent: 4
1366  * c-label-offset: -4
1367  * c-continued-statement-offset: 4
1368  * c-continued-brace-offset: 0
1369  * tab-width: 8
1370  * End:
1371  */
/* */
root/drivers/scsi/eata_dma.c

DEFINITIONS
