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   1 /****************************************************************************
   2  * Perceptive Solutions, Inc. PCI-2000 device driver for Linux.
   3  *
   4  * pci2000.c - Linux Host Driver for PCI-2000 IntelliCache SCSI Adapters
   5  *
   6  * Copyright (c) 1997-1999 Perceptive Solutions, Inc.
   7  * All Rights Reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that redistributions of source
  11  * code retain the above copyright notice and this comment without
  12  * modification.
  13  *
  14  * Technical updates and product information at:
  15  *  http://www.psidisk.com
  16  *
  17  * Please send questions, comments, bug reports to:
  18  *  tech@psidisk.com Technical Support
  19  *
  20  *
  21  *      Revisions       1.10    Jan-21-1999
  22  *              - Fixed sign on message to reflect proper controller name.
  23  *              - Added support for RAID status monitoring and control.
  24  *
  25  *  Revisions   1.11    Mar-22-1999
  26  *              - Fixed control timeout to not lock up the entire system if
  27  *                controller goes offline completely.
  28  *
  29  *      Revisions 1.12          Mar-26-1999
  30  *              - Fixed spinlock and PCI configuration.
  31  *
  32  *      Revisions 1.20          Mar-27-2000
  33  *              - Added support for dynamic DMA
  34  *
  35  ****************************************************************************/
  36 #define PCI2000_VERSION         "1.20"
  37
  38 #include <linux/blkdev.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/module.h>
  41 #include <linux/kernel.h>
  42 #include <linux/types.h>
  43 #include <linux/string.h>
  44 #include <linux/pci.h>
  45 #include <linux/ioport.h>
  46 #include <linux/delay.h>
  47 #include <linux/sched.h>
  48 #include <linux/proc_fs.h>
  49 #include <linux/stat.h>
  50 #include <linux/spinlock.h>
  51
  52 #include <asm/dma.h>
  53 #include <asm/system.h>
  54 #include <asm/io.h>
  55
  56 #include "scsi.h"
  57 #include <scsi/scsi_host.h>
  58 #include "pci2000.h"
  59 #include "psi_roy.h"
  60
  61
  62 //#define DEBUG 1
  63
  64 #ifdef DEBUG
  65 #define DEB(x) x
  66 #define STOP_HERE       {int st;for(st=0;st<100;st++){st=1;}}
  67 #else
  68 #define DEB(x)
  69 #define STOP_HERE
  70 #endif
  71
  72 typedef struct
  73         {
  74         unsigned int    address;
  75         unsigned int    length;
  76         }       SCATGATH, *PSCATGATH;
  77
  78 typedef struct
  79         {
  80         Scsi_Cmnd               *SCpnt;
  81         PSCATGATH                scatGath;
  82         dma_addr_t               scatGathDma;
  83         UCHAR                   *cdb;
  84         dma_addr_t               cdbDma;
  85         UCHAR                    tag;
  86         }       DEV2000, *PDEV2000;
  87
  88 typedef struct
  89         {
  90         ULONG                    basePort;
  91         ULONG                    mb0;
  92         ULONG                    mb1;
  93         ULONG                    mb2;
  94         ULONG                    mb3;
  95         ULONG                    mb4;
  96         ULONG                    cmd;
  97         ULONG                    tag;
  98         ULONG                    irqOwned;
  99         struct pci_dev  *pdev;
 100         DEV2000                  dev[MAX_BUS][MAX_UNITS];
 101         }       ADAPTER2000, *PADAPTER2000;
 102
 103 #define HOSTDATA(host) ((PADAPTER2000)&host->hostdata)
 104 #define consistentLen (MAX_BUS * MAX_UNITS * (16 * sizeof (SCATGATH) + MAX_COMMAND_SIZE))
 105
 106
 107 static struct   Scsi_Host          *PsiHost[MAXADAPTER] = {NULL,};  // One for each adapter
 108 static                  int                             NumAdapters = 0;
 109 /****************************************************************
 110  *      Name:                   WaitReady       :LOCAL
 111  *
 112  *      Description:    Wait for controller ready.
 113  *
 114  *      Parameters:             padapter - Pointer adapter data structure.
 115  *
 116  *      Returns:                TRUE on not ready.
 117  *
 118  ****************************************************************/
 119 static int WaitReady (PADAPTER2000 padapter)
 120         {
 121         ULONG   z;
 122
 123         for ( z = 0;  z < (TIMEOUT_COMMAND * 4);  z++ )
 124                 {
 125                 if ( !inb_p (padapter->cmd) )
 126                         return FALSE;
 127                 udelay (250);
 128                 };
 129         return TRUE;
 130         }
 131 /****************************************************************
 132  *      Name:                   WaitReadyLong   :LOCAL
 133  *
 134  *      Description:    Wait for controller ready.
 135  *
 136  *      Parameters:             padapter - Pointer adapter data structure.
 137  *
 138  *      Returns:                TRUE on not ready.
 139  *
 140  ****************************************************************/
 141 static int WaitReadyLong (PADAPTER2000 padapter)
 142         {
 143         ULONG   z;
 144
 145         for ( z = 0;  z < (5000 * 4);  z++ )
 146                 {
 147                 if ( !inb_p (padapter->cmd) )
 148                         return FALSE;
 149                 udelay (250);
 150                 };
 151         return TRUE;
 152         }
 153 /****************************************************************
 154  *      Name:   OpDone  :LOCAL
 155  *
 156  *      Description:    Clean up operation and issue done to caller.
 157  *
 158  *      Parameters:             SCpnt   - Pointer to SCSI command structure.
 159  *                                      status  - Caller status.
 160  *
 161  *      Returns:                Nothing.
 162  *
 163  ****************************************************************/
 164 static void OpDone (Scsi_Cmnd *SCpnt, ULONG status)
 165         {
 166         SCpnt->result = status;
 167         SCpnt->scsi_done (SCpnt);
 168         }
 169 /****************************************************************
 170  *      Name:   Command         :LOCAL
 171  *
 172  *      Description:    Issue queued command to the PCI-2000.
 173  *
 174  *      Parameters:             padapter - Pointer to adapter information structure.
 175  *                                      cmd              - PCI-2000 command byte.
 176  *
 177  *      Returns:                Non-zero command tag if operation is accepted.
 178  *
 179  ****************************************************************/
 180 static UCHAR Command (PADAPTER2000 padapter, UCHAR cmd)
 181         {
 182         outb_p (cmd, padapter->cmd);
 183         if ( WaitReady (padapter) )
 184                 return 0;
 185
 186         if ( inw_p (padapter->mb0) )
 187                 return 0;
 188
 189         return inb_p (padapter->mb1);
 190         }
 191 /****************************************************************
 192  *      Name:   BuildSgList             :LOCAL
 193  *
 194  *      Description:    Build the scatter gather list for controller.
 195  *
 196  *      Parameters:             SCpnt    - Pointer to SCSI command structure.
 197  *                                      padapter - Pointer to adapter information structure.
 198  *                                      pdev     - Pointer to adapter device structure.
 199  *
 200  *      Returns:                Non-zero in not scatter gather.
 201  *
 202  ****************************************************************/
 203 static int BuildSgList (Scsi_Cmnd *SCpnt, PADAPTER2000 padapter, PDEV2000 pdev)
 204         {
 205         int                                      z;
 206         int                                      zc;
 207         struct scatterlist      *sg;
 208
 209         if ( SCpnt->use_sg )
 210                 {
 211                 sg = (struct scatterlist *)SCpnt->request_buffer;
 212                 zc = pci_map_sg (padapter->pdev, sg, SCpnt->use_sg, scsi_to_pci_dma_dir (SCpnt->sc_data_direction));
 213                 for ( z = 0;  z < zc;  z++ )
 214                         {
 215                         pdev->scatGath[z].address = cpu_to_le32 (sg_dma_address (sg));
 216                         pdev->scatGath[z].length = cpu_to_le32 (sg_dma_len (sg++));
 217                         }
 218                 outl (pdev->scatGathDma, padapter->mb2);
 219                 outl ((zc << 24) | SCpnt->request_bufflen, padapter->mb3);
 220                 return FALSE;
 221                 }
 222         if ( !SCpnt->request_bufflen)
 223                 {
 224                 outl (0, padapter->mb2);
 225                 outl (0, padapter->mb3);
 226                 return TRUE;
 227                 }
 228         SCpnt->SCp.have_data_in = pci_map_single (padapter->pdev, SCpnt->request_buffer, SCpnt->request_bufflen, scsi_to_pci_dma_dir (SCpnt->sc_data_direction));
 229         outl (SCpnt->SCp.have_data_in, padapter->mb2);
 230         outl (SCpnt->request_bufflen, padapter->mb3);
 231         return TRUE;
 232         }
 233 /*********************************************************************
 234  *      Name:   PsiRaidCmd
 235  *
 236  *      Description:    Execute a simple command.
 237  *
 238  *      Parameters:             padapter - Pointer to adapter control structure.
 239  *                                      cmd              - Roy command byte.
 240  *
 241  *      Returns:                Return error status.
 242  *
 243  ********************************************************************/
 244 static int PsiRaidCmd (PADAPTER2000 padapter, char cmd)
 245         {
 246         if ( WaitReady (padapter) )                                             // test for command register ready
 247                 return DID_TIME_OUT;
 248         outb_p (cmd, padapter->cmd);                                    // issue command
 249         if ( WaitReadyLong (padapter) )                                 // wait for adapter ready
 250                 return DID_TIME_OUT;
 251         return DID_OK;
 252         }
 253 /****************************************************************
 254  *      Name:   Irq_Handler     :LOCAL
 255  *
 256  *      Description:    Interrupt handler.
 257  *
 258  *      Parameters:             irq             - Hardware IRQ number.
 259  *                                      dev_id  -
 260  *                                      regs    -
 261  *
 262  *      Returns:                TRUE if drive is not ready in time.
 263  *
 264  ****************************************************************/
 265 static irqreturn_t Irq_Handler (int irq, void *dev_id, struct pt_regs *regs)
 266         {
 267         struct Scsi_Host   *shost = NULL;       // Pointer to host data block
 268         PADAPTER2000            padapter;               // Pointer to adapter control structure
 269         PDEV2000                        pdev;
 270         Scsi_Cmnd                  *SCpnt;
 271         UCHAR                           tag = 0;
 272         UCHAR                           tag0;
 273         ULONG                           error;
 274         int                                     pun;
 275         int                                     bus;
 276         int                                     z;
 277     unsigned long               flags;
 278     int handled = 0;
 279
 280         DEB(printk ("\npci2000 received interrupt "));
 281         for ( z = 0; z < NumAdapters;  z++ )                                                                            // scan for interrupt to process
 282                 {
 283                 if ( PsiHost[z]->irq == (UCHAR)(irq & 0xFF) )
 284                         {
 285                         tag = inb_p (HOSTDATA(PsiHost[z])->tag);
 286                         if (  tag )
 287                                 {
 288                                 shost = PsiHost[z];
 289                                 break;
 290                                 }
 291                         }
 292                 }
 293
 294         if ( !shost )
 295                 {
 296                 DEB (printk ("\npci2000: not my interrupt"));
 297                 goto out;
 298                 }
 299
 300     handled = 1;
 301         spin_lock_irqsave(shost->host_lock, flags);
 302         padapter = HOSTDATA(shost);
 303
 304         tag0 = tag & 0x7F;                                                                                                                      // mask off the error bit
 305         for ( bus = 0;  bus < MAX_BUS;  bus++ )                                                                         // scan the busses
 306         {
 307                 for ( pun = 0;  pun < MAX_UNITS;  pun++ )                                                               // scan the targets
 308                 {
 309                         pdev = &padapter->dev[bus][pun];
 310                         if ( !pdev->tag )
 311                         continue;
 312                         if ( pdev->tag == tag0 )                                                                                        // is this it?
 313                                 {
 314                                 pdev->tag = 0;
 315                                 SCpnt = pdev->SCpnt;
 316                                 goto unmapProceed;
 317                         }
 318                         }
 319         }
 320
 321         outb_p (0xFF, padapter->tag);                                                                                           // clear the op interrupt
 322         outb_p (CMD_DONE, padapter->cmd);                                                                                       // complete the op
 323         goto irq_return;                                                                                                                        // done, but, with what?
 324
 325 unmapProceed:;
 326         if ( !bus )
 327                 {
 328                 switch ( SCpnt->cmnd[0] )
 329                         {
 330                         case SCSIOP_TEST_UNIT_READY:
 331                                 pci_unmap_single (padapter->pdev, SCpnt->SCp.have_data_in, sizeof (SCpnt->sense_buffer), PCI_DMA_FROMDEVICE);
 332                                 goto irqProceed;
 333                         case SCSIOP_READ_CAPACITY:
 334                                 pci_unmap_single (padapter->pdev, SCpnt->SCp.have_data_in, 8, PCI_DMA_FROMDEVICE);
 335                                 goto irqProceed;
 336                         case SCSIOP_VERIFY:
 337                         case SCSIOP_START_STOP_UNIT:
 338                         case SCSIOP_MEDIUM_REMOVAL:
 339                                 goto irqProceed;
 340                         }
 341                 }
 342         if ( SCpnt->SCp.have_data_in )
 343                 pci_unmap_single (padapter->pdev, SCpnt->SCp.have_data_in, SCpnt->request_bufflen, scsi_to_pci_dma_dir(SCpnt->sc_data_direction));
 344         else
 345                 {
 346                 if ( SCpnt->use_sg )
 347                         pci_unmap_sg (padapter->pdev, (struct scatterlist *)SCpnt->request_buffer, SCpnt->use_sg, scsi_to_pci_dma_dir(SCpnt->sc_data_direction));
 348                 }
 349
 350 irqProceed:;
 351         if ( tag & ERR08_TAGGED )                                                                                               // is there an error here?
 352                 {
 353                 if ( WaitReady (padapter) )
 354                         {
 355                         OpDone (SCpnt, DID_TIME_OUT << 16);
 356                         goto irq_return;
 357                         }
 358
 359                 outb_p (tag0, padapter->mb0);                                                                           // get real error code
 360                 outb_p (CMD_ERROR, padapter->cmd);
 361                 if ( WaitReady (padapter) )                                                                                     // wait for controller to suck up the op
 362                         {
 363                         OpDone (SCpnt, DID_TIME_OUT << 16);
 364                         goto irq_return;
 365                         }
 366
 367                 error = inl (padapter->mb0);                                                                            // get error data
 368                 outb_p (0xFF, padapter->tag);                                                                           // clear the op interrupt
 369                 outb_p (CMD_DONE, padapter->cmd);                                                                       // complete the op
 370
 371                 DEB (printk ("status: %lX ", error));
 372                 if ( error == 0x00020002 )                                                                                      // is this error a check condition?
 373                         {
 374                         if ( bus )                                                                                                              // are we doint SCSI commands?
 375                                 {
 376                                 OpDone (SCpnt, (DID_OK << 16) | 2);
 377                                 goto irq_return;
 378                                 }
 379                         if ( *SCpnt->cmnd == SCSIOP_TEST_UNIT_READY )
 380                                 OpDone (SCpnt, (DRIVER_SENSE << 24) | (DID_OK << 16) | 2);      // test caller we have sense data too
 381                         else
 382                                 OpDone (SCpnt, DID_ERROR << 16);
 383                         goto irq_return;
 384                         }
 385                 OpDone (SCpnt, DID_ERROR << 16);
 386                 goto irq_return;
 387                 }
 388
 389         outb_p (0xFF, padapter->tag);                                                                                   // clear the op interrupt
 390         outb_p (CMD_DONE, padapter->cmd);                                                                               // complete the op
 391         OpDone (SCpnt, DID_OK << 16);
 392
 393 irq_return:
 394     spin_unlock_irqrestore(shost->host_lock, flags);
 395 out:
 396     return IRQ_RETVAL(handled);
 397 }
 398 /****************************************************************
 399  *      Name:   Pci2000_QueueCommand
 400  *
 401  *      Description:    Process a queued command from the SCSI manager.
 402  *
 403  *      Parameters:             SCpnt - Pointer to SCSI command structure.
 404  *                                      done  - Pointer to done function to call.
 405  *
 406  *      Returns:                Status code.
 407  *
 408  ****************************************************************/
 409 int Pci2000_QueueCommand (Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
 410         {
 411         UCHAR              *cdb = (UCHAR *)SCpnt->cmnd;                                 // Pointer to SCSI CDB
 412         PADAPTER2000    padapter = HOSTDATA(SCpnt->device->host);                       // Pointer to adapter control structure
 413         int                             rc               = -1;                                                          // command return code
 414         UCHAR                   bus              = SCpnt->device->channel;
 415         UCHAR                   pun              = SCpnt->device->id;
 416         UCHAR                   lun              = SCpnt->device->lun;
 417         UCHAR                   cmd;
 418         PDEV2000                pdev     = &padapter->dev[bus][pun];
 419
 420         if ( !done )
 421                 {
 422                 printk("pci2000_queuecommand: %02X: done can't be NULL\n", *cdb);
 423                 return 0;
 424                 }
 425
 426         SCpnt->scsi_done = done;
 427         SCpnt->SCp.have_data_in = 0;
 428         pdev->SCpnt = SCpnt;                                                                    // Save this command data
 429
 430         if ( WaitReady (padapter) )
 431                 {
 432                 rc = DID_ERROR;
 433                 goto finished;
 434                 }
 435
 436         outw_p (pun | (lun << 8), padapter->mb0);
 437
 438         if ( bus )
 439                 {
 440                 DEB (if(*cdb) printk ("\nCDB: %X-  %X %X %X %X %X %X %X %X %X %X ", SCpnt->cmd_len, cdb[0], cdb[1], cdb[2], cdb[3], cdb[4], cdb[5], cdb[6], cdb[7], cdb[8], cdb[9]));
 441                 DEB (if(*cdb) printk ("\ntimeout_per_command: %d, timeout_total: %d, timeout: %d", SCpnt->timeout_per_command,
 442                                                           SCpnt->timeout_total, SCpnt->timeout));
 443                 outl (SCpnt->timeout_per_command, padapter->mb1);
 444                 outb_p (CMD_SCSI_TIMEOUT, padapter->cmd);
 445                 if ( WaitReady (padapter) )
 446                         {
 447                         rc = DID_ERROR;
 448                         goto finished;
 449                         }
 450
 451                 outw_p (pun | (lun << 8), padapter->mb0);
 452                 outw_p (SCpnt->cmd_len << 8, padapter->mb0 + 2);
 453                 memcpy (pdev->cdb, cdb, MAX_COMMAND_SIZE);
 454
 455                 outl (pdev->cdbDma, padapter->mb1);
 456                 if ( BuildSgList (SCpnt, padapter, pdev) )
 457                         cmd = CMD_SCSI_THRU;
 458                 else
 459                         cmd = CMD_SCSI_THRU_SG;
 460                 if ( (pdev->tag = Command (padapter, cmd)) == 0 )
 461                         rc = DID_TIME_OUT;
 462                 goto finished;
 463                 }
 464         else
 465                 {
 466                 if ( lun )
 467                         {
 468                         rc = DID_BAD_TARGET;
 469                         goto finished;
 470                         }
 471                 }
 472
 473         switch ( *cdb )
 474                 {
 475                 case SCSIOP_INQUIRY:                                    // inquiry CDB
 476                         if ( cdb[2] == SC_MY_RAID )
 477                                 {
 478                                 switch ( cdb[3] )
 479                                         {
 480                                         case MY_SCSI_REBUILD:
 481                                                 OpDone (SCpnt, PsiRaidCmd (padapter, CMD_RAID_REBUILD) << 16);
 482                                                 return 0;
 483                                         case MY_SCSI_ALARMMUTE:
 484                                                 OpDone (SCpnt, PsiRaidCmd (padapter, CMD_RAID_MUTE) << 16);
 485                                                 return 0;
 486                                         case MY_SCSI_DEMOFAIL:
 487                                                 OpDone (SCpnt, PsiRaidCmd (padapter, CMD_RAID_FAIL) << 16);
 488                                                 return 0;
 489                                         default:
 490                                                 if ( SCpnt->use_sg )
 491                                                         {
 492                                                         rc = DID_ERROR;
 493                                                         goto finished;
 494                                                         }
 495                                                 else
 496                                                         {
 497                                                         SCpnt->SCp.have_data_in = pci_map_single (padapter->pdev, SCpnt->request_buffer, SCpnt->request_bufflen,
 498                                                                                                           scsi_to_pci_dma_dir(SCpnt->sc_data_direction));
 499                                                         outl (SCpnt->SCp.have_data_in, padapter->mb2);
 500                                                         }
 501                                                 outl (cdb[5], padapter->mb0);
 502                                                 outl (cdb[3], padapter->mb3);
 503                                                 cmd = CMD_DASD_RAID_RQ;
 504                                                 break;
 505                                         }
 506                                 break;
 507                                 }
 508
 509                         if ( SCpnt->use_sg )
 510                                 {
 511                                 SCpnt->SCp.have_data_in = pci_map_single (padapter->pdev,
 512                                                                           ((struct scatterlist *)SCpnt->request_buffer)->address,
 513                                                                           SCpnt->request_bufflen,
 514                                                                           scsi_to_pci_dma_dir (SCpnt->sc_data_direction));
 515                                 }
 516                         else
 517                                 {
 518                                 SCpnt->SCp.have_data_in = pci_map_single (padapter->pdev, SCpnt->request_buffer,
 519                                                                           SCpnt->request_bufflen,
 520                                                                           scsi_to_pci_dma_dir (SCpnt->sc_data_direction));
 521                                 }
 522                         outl (SCpnt->SCp.have_data_in, padapter->mb2);
 523                         outl (SCpnt->request_bufflen, padapter->mb3);
 524                         cmd = CMD_DASD_SCSI_INQ;
 525                         break;
 526
 527                 case SCSIOP_TEST_UNIT_READY:                    // test unit ready CDB
 528                         SCpnt->SCp.have_data_in = pci_map_single (padapter->pdev, SCpnt->sense_buffer, sizeof (SCpnt->sense_buffer), PCI_DMA_FROMDEVICE);
 529                         outl (SCpnt->SCp.have_data_in, padapter->mb2);
 530                         outl (sizeof (SCpnt->sense_buffer), padapter->mb3);
 531                         cmd = CMD_TEST_READY;
 532                         break;
 533
 534                 case SCSIOP_READ_CAPACITY:                              // read capacity CDB
 535                         if ( SCpnt->use_sg )
 536                                 {
 537                                 SCpnt->SCp.have_data_in = pci_map_single (padapter->pdev, ((struct scatterlist *)(SCpnt->request_buffer))->address,
 538                                                                                   8, PCI_DMA_FROMDEVICE);
 539                                 }
 540                         else
 541                                 SCpnt->SCp.have_data_in = pci_map_single (padapter->pdev, SCpnt->request_buffer, 8, PCI_DMA_FROMDEVICE);
 542                         outl (SCpnt->SCp.have_data_in, padapter->mb2);
 543                         outl (8, padapter->mb3);
 544                         cmd = CMD_DASD_CAP;
 545                         break;
 546                 case SCSIOP_VERIFY:                                             // verify CDB
 547                         outw_p ((USHORT)cdb[8] | ((USHORT)cdb[7] << 8), padapter->mb0 + 2);
 548                         outl (XSCSI2LONG (&cdb[2]), padapter->mb1);
 549                         cmd = CMD_READ_SG;
 550                         break;
 551                 case SCSIOP_READ:                                               // read10 CDB
 552                         outw_p ((USHORT)cdb[8] | ((USHORT)cdb[7] << 8), padapter->mb0 + 2);
 553                         outl (XSCSI2LONG (&cdb[2]), padapter->mb1);
 554                         if ( BuildSgList (SCpnt, padapter, pdev) )
 555                                 cmd = CMD_READ;
 556                         else
 557                                 cmd = CMD_READ_SG;
 558                         break;
 559                 case SCSIOP_READ6:                                              // read6  CDB
 560                         outw_p (cdb[4], padapter->mb0 + 2);
 561                         outl ((SCSI2LONG (&cdb[1])) & 0x001FFFFF, padapter->mb1);
 562                         if ( BuildSgList (SCpnt, padapter, pdev) )
 563                                 cmd = CMD_READ;
 564                         else
 565                                 cmd = CMD_READ_SG;
 566                         break;
 567                 case SCSIOP_WRITE:                                              // write10 CDB
 568                         outw_p ((USHORT)cdb[8] | ((USHORT)cdb[7] << 8), padapter->mb0 + 2);
 569                         outl (XSCSI2LONG (&cdb[2]), padapter->mb1);
 570                         if ( BuildSgList (SCpnt, padapter, pdev) )
 571                                 cmd = CMD_WRITE;
 572                         else
 573                                 cmd = CMD_WRITE_SG;
 574                         break;
 575                 case SCSIOP_WRITE6:                                             // write6  CDB
 576                         outw_p (cdb[4], padapter->mb0 + 2);
 577                         outl ((SCSI2LONG (&cdb[1])) & 0x001FFFFF, padapter->mb1);
 578                         if ( BuildSgList (SCpnt, padapter, pdev) )
 579                                 cmd = CMD_WRITE;
 580                         else
 581                                 cmd = CMD_WRITE_SG;
 582                         break;
 583                 case SCSIOP_START_STOP_UNIT:
 584                         cmd = CMD_EJECT_MEDIA;
 585                         break;
 586                 case SCSIOP_MEDIUM_REMOVAL:
 587                         switch ( cdb[4] )
 588                                 {
 589                                 case 0:
 590                                         cmd = CMD_UNLOCK_DOOR;
 591                                         break;
 592                                 case 1:
 593                                         cmd = CMD_LOCK_DOOR;
 594                                         break;
 595                                 default:
 596                                         cmd = 0;
 597                                         break;
 598                                 }
 599                         if ( cmd )
 600                                 break;
 601                 default:
 602                         DEB (printk ("pci2000_queuecommand: Unsupported command %02X\n", *cdb));
 603                         OpDone (SCpnt, DID_ERROR << 16);
 604                         return 0;
 605                 }
 606
 607         if ( (pdev->tag = Command (padapter, cmd)) == 0 )
 608                 rc = DID_TIME_OUT;
 609 finished:;
 610         if ( rc != -1 )
 611                 OpDone (SCpnt, rc << 16);
 612         return 0;
 613         }
 614 /****************************************************************
 615  *      Name:   Pci2000_Detect
 616  *
 617  *      Description:    Detect and initialize our boards.
 618  *
 619  *      Parameters:             tpnt - Pointer to SCSI host template structure.
 620  *
 621  *      Returns:                Number of adapters installed.
 622  *
 623  ****************************************************************/
 624 int Pci2000_Detect (Scsi_Host_Template *tpnt)
 625         {
 626         int                                     found = 0;
 627         int                                     installed = 0;
 628         struct Scsi_Host   *pshost;
 629         PADAPTER2000        padapter;
 630         int                                     z, zz;
 631         int                                     setirq;
 632         struct pci_dev     *pdev = NULL;
 633         UCHAR                      *consistent;
 634         dma_addr_t                      consistentDma;
 635
 636         while ( (pdev = pci_find_device (VENDOR_PSI, DEVICE_ROY_1, pdev)) != NULL )
 637                 {
 638                 if (pci_enable_device(pdev))
 639                         continue;
 640                 pshost = scsi_register (tpnt, sizeof(ADAPTER2000));
 641                 if(pshost == NULL)
 642                         continue;
 643                 padapter = HOSTDATA(pshost);
 644
 645                 padapter->basePort = pci_resource_start (pdev, 1);
 646                 DEB (printk ("\nBase Regs = %#04X", padapter->basePort));                       // get the base I/O port address
 647                 padapter->mb0   = padapter->basePort + RTR_MAILBOX;                                     // get the 32 bit mail boxes
 648                 padapter->mb1   = padapter->basePort + RTR_MAILBOX + 4;
 649                 padapter->mb2   = padapter->basePort + RTR_MAILBOX + 8;
 650                 padapter->mb3   = padapter->basePort + RTR_MAILBOX + 12;
 651                 padapter->mb4   = padapter->basePort + RTR_MAILBOX + 16;
 652                 padapter->cmd   = padapter->basePort + RTR_LOCAL_DOORBELL;                      // command register
 653                 padapter->tag   = padapter->basePort + RTR_PCI_DOORBELL;                        // tag/response register
 654                 padapter->pdev = pdev;
 655
 656                 if ( WaitReady (padapter) )
 657                         goto unregister;
 658                 outb_p (0x84, padapter->mb0);
 659                 outb_p (CMD_SPECIFY, padapter->cmd);
 660                 if ( WaitReady (padapter) )
 661                         goto unregister;
 662
 663                 consistent = pci_alloc_consistent (pdev, consistentLen, &consistentDma);
 664                 if ( !consistent )
 665                         {
 666                         printk ("Unable to allocate DMA memory for PCI-2000 controller.\n");
 667                         goto unregister;
 668                         }
 669
 670                 scsi_set_device(pshost, &pdev->dev);
 671                 pshost->irq = pdev->irq;
 672                 setirq = 1;
 673                 padapter->irqOwned = 0;
 674                 for ( z = 0;  z < installed;  z++ )                                                                     // scan for shared interrupts
 675                         {
 676                         if ( PsiHost[z]->irq == pshost->irq )                                                   // if shared then, don't posses
 677                                 setirq = 0;
 678                         }
 679                 if ( setirq )                                                                                           // if not shared, posses
 680                         {
 681                         if ( request_irq (pshost->irq, Irq_Handler, SA_SHIRQ, "pci2000", padapter) < 0 )
 682                                 {
 683                                 if ( request_irq (pshost->irq, Irq_Handler, SA_INTERRUPT | SA_SHIRQ, "pci2000", padapter) < 0 )
 684                                         {
 685                                         printk ("Unable to allocate IRQ for PCI-2000 controller.\n");
 686                                         pci_free_consistent (pdev, consistentLen, consistent, consistentDma);
 687                                         goto unregister;
 688                                         }
 689                                 }
 690                         padapter->irqOwned = pshost->irq;                                               // set IRQ as owned
 691                         }
 692                 PsiHost[installed]      = pshost;                                                                               // save SCSI_HOST pointer
 693
 694                 pshost->io_port         = padapter->basePort;
 695                 pshost->n_io_port       = 0xFF;
 696                 pshost->unique_id       = padapter->basePort;
 697                 pshost->max_id          = 16;
 698                 pshost->max_channel     = 1;
 699
 700                 for ( zz = 0;  zz < MAX_BUS;  zz++ )
 701                         for ( z = 0; z < MAX_UNITS;  z++ )
 702                                 {
 703                                 padapter->dev[zz][z].tag = 0;
 704                                 padapter->dev[zz][z].scatGath = (PSCATGATH)consistent;
 705                                 padapter->dev[zz][z].scatGathDma = consistentDma;
 706                                 consistent += 16 * sizeof (SCATGATH);
 707                                 consistentDma += 16 * sizeof (SCATGATH);
 708                                 padapter->dev[zz][z].cdb = (UCHAR *)consistent;
 709                                 padapter->dev[zz][z].cdbDma = consistentDma;
 710                                 consistent += MAX_COMMAND_SIZE;
 711                                 consistentDma += MAX_COMMAND_SIZE;
 712                                 }
 713
 714                 printk("\nPSI-2000 Intelligent Storage SCSI CONTROLLER: at I/O = %lX  IRQ = %d\n", padapter->basePort, pshost->irq);
 715                 printk("Version %s, Compiled %s %s\n\n", PCI2000_VERSION,  __DATE__, __TIME__);
 716                 found++;
 717                 if ( ++installed < MAXADAPTER )
 718                         continue;
 719                 break;
 720 unregister:;
 721                 scsi_unregister (pshost);
 722                 found++;
 723                 }
 724         NumAdapters = installed;
 725         return installed;
 726         }
 727 /****************************************************************
 728  *      Name:   Pci2000_Abort
 729  *
 730  *      Description:    Process the Abort command from the SCSI manager.
 731  *
 732  *      Parameters:             SCpnt - Pointer to SCSI command structure.
 733  *
 734  *      Returns:                Allways snooze.
 735  *
 736  ****************************************************************/
 737 int Pci2000_Abort (Scsi_Cmnd *SCpnt)
 738         {
 739         DEB (printk ("pci2000_abort\n"));
 740         return SCSI_ABORT_SNOOZE;
 741         }
 742 /****************************************************************
 743  *      Name:   Pci2000_Reset
 744  *
 745  *      Description:    Process the Reset command from the SCSI manager.
 746  *
 747  *      Parameters:             SCpnt - Pointer to SCSI command structure.
 748  *                                      flags - Flags about the reset command
 749  *
 750  *      Returns:                No active command at this time, so this means
 751  *                                      that each time we got some kind of response the
 752  *                                      last time through.  Tell the mid-level code to
 753  *                                      request sense information in order to decide what
 754  *                                      to do next.
 755  *
 756  ****************************************************************/
 757 int Pci2000_Reset (Scsi_Cmnd *SCpnt, unsigned int reset_flags)
 758         {
 759         return SCSI_RESET_PUNT;
 760         }
 761 /****************************************************************
 762  *      Name:   Pci2000_Release
 763  *
 764  *      Description:    Release resources allocated for a single each adapter.
 765  *
 766  *      Parameters:             pshost - Pointer to SCSI command structure.
 767  *
 768  *      Returns:                zero.
 769  *
 770  ****************************************************************/
 771 int Pci2000_Release (struct Scsi_Host *pshost)
 772         {
 773     PADAPTER2000        padapter = HOSTDATA (pshost);
 774
 775         if ( padapter->irqOwned )
 776                 free_irq (pshost->irq, padapter);
 777         pci_free_consistent (padapter->pdev, consistentLen, padapter->dev[0][0].scatGath, padapter->dev[0][0].scatGathDma);
 778         release_region (pshost->io_port, pshost->n_io_port);
 779     scsi_unregister(pshost);
 780     return 0;
 781         }
 782
 783 /****************************************************************
 784  *      Name:   Pci2000_BiosParam
 785  *
 786  *      Description:    Process the biosparam request from the SCSI manager to
 787  *                                      return C/H/S data.
 788  *
 789  *      Parameters:             disk - Pointer to SCSI disk structure.
 790  *                                      dev      - Major/minor number from kernel.
 791  *                                      geom - Pointer to integer array to place geometry data.
 792  *
 793  *      Returns:                zero.
 794  *
 795  ****************************************************************/
 796 int Pci2000_BiosParam (struct scsi_device *sdev, struct block_device *dev,
 797                 sector_t capacity, int geom[])
 798         {
 799         PADAPTER2000        padapter;
 800
 801         padapter = HOSTDATA(sdev->host);
 802
 803         if ( WaitReady (padapter) )
 804                 return 0;
 805         outb_p (sdev->id, padapter->mb0);
 806         outb_p (CMD_GET_PARMS, padapter->cmd);
 807         if ( WaitReady (padapter) )
 808                 return 0;
 809
 810         geom[0] = inb_p (padapter->mb2 + 3);
 811         geom[1] = inb_p (padapter->mb2 + 2);
 812         geom[2] = inw_p (padapter->mb2);
 813         return 0;
 814         }
 815
 816
 817 MODULE_LICENSE("Dual BSD/GPL");
 818
 819 static Scsi_Host_Template driver_template = {
 820         .proc_name      = "pci2000",
 821         .name           = "PCI-2000 SCSI Intelligent Disk Controller",
 822         .detect         = Pci2000_Detect,
 823         .release        = Pci2000_Release,
 824         .queuecommand   = Pci2000_QueueCommand,
 825         .abort          = Pci2000_Abort,
 826         .reset          = Pci2000_Reset,
 827         .bios_param     = Pci2000_BiosParam,
 828         .can_queue      = 16,
 829         .this_id        = -1,
 830         .sg_tablesize   = 16,
 831         .cmd_per_lun    = 1,
 832         .use_clustering = DISABLE_CLUSTERING,
 833 };
 834 #include "scsi_module.c"