drivers/scsi/aic7xxx/aic7xxx_osm.h

   1 /*
   2  * Adaptec AIC7xxx device driver for Linux.
   3  *
   4  * Copyright (c) 1994 John Aycock
   5  *   The University of Calgary Department of Computer Science.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  * Copyright (c) 2000-2003 Adaptec Inc.
  22  * All rights reserved.
  23  *
  24  * Redistribution and use in source and binary forms, with or without
  25  * modification, are permitted provided that the following conditions
  26  * are met:
  27  * 1. Redistributions of source code must retain the above copyright
  28  *    notice, this list of conditions, and the following disclaimer,
  29  *    without modification.
  30  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  31  *    substantially similar to the "NO WARRANTY" disclaimer below
  32  *    ("Disclaimer") and any redistribution must be conditioned upon
  33  *    including a substantially similar Disclaimer requirement for further
  34  *    binary redistribution.
  35  * 3. Neither the names of the above-listed copyright holders nor the names
  36  *    of any contributors may be used to endorse or promote products derived
  37  *    from this software without specific prior written permission.
  38  *
  39  * Alternatively, this software may be distributed under the terms of the
  40  * GNU General Public License ("GPL") version 2 as published by the Free
  41  * Software Foundation.
  42  *
  43  * NO WARRANTY
  44  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  45  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  46  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  47  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  48  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  52  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  53  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  54  * POSSIBILITY OF SUCH DAMAGES.
  55  *
  56  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.h#151 $
  57  *
  58  */
  59 #ifndef _AIC7XXX_LINUX_H_
  60 #define _AIC7XXX_LINUX_H_
  61
  62 #include <linux/config.h>
  63 #include <linux/types.h>
  64 #include <linux/blkdev.h>
  65 #include <linux/delay.h>
  66 #include <linux/ioport.h>
  67 #include <linux/pci.h>
  68 #include <linux/smp_lock.h>
  69 #include <linux/interrupt.h>
  70 #include <linux/module.h>
  71 #include <linux/slab.h>
  72 #include <asm/byteorder.h>
  73 #include <asm/io.h>
  74
  75 #include <scsi/scsi.h>
  76 #include <scsi/scsi_cmnd.h>
  77 #include <scsi/scsi_eh.h>
  78 #include <scsi/scsi_device.h>
  79 #include <scsi/scsi_host.h>
  80 #include <scsi/scsi_tcq.h>
  81 #include <scsi/scsi_transport.h>
  82 #include <scsi/scsi_transport_spi.h>
  83
  84 /* Core SCSI definitions */
  85 #define AIC_LIB_PREFIX ahc
  86
  87 /* Name space conflict with BSD queue macros */
  88 #ifdef LIST_HEAD
  89 #undef LIST_HEAD
  90 #endif
  91
  92 #include "cam.h"
  93 #include "queue.h"
  94 #include "scsi_message.h"
  95 #include "aiclib.h"
  96
  97 /*********************************** Debugging ********************************/
  98 #ifdef CONFIG_AIC7XXX_DEBUG_ENABLE
  99 #ifdef CONFIG_AIC7XXX_DEBUG_MASK
 100 #define AHC_DEBUG 1
 101 #define AHC_DEBUG_OPTS CONFIG_AIC7XXX_DEBUG_MASK
 102 #else
 103 /*
 104  * Compile in debugging code, but do not enable any printfs.
 105  */
 106 #define AHC_DEBUG 1
 107 #endif
 108 /* No debugging code. */
 109 #endif
 110
 111 /************************* Forward Declarations *******************************/
 112 struct ahc_softc;
 113 typedef struct pci_dev *ahc_dev_softc_t;
 114 typedef struct scsi_cmnd      *ahc_io_ctx_t;
 115
 116 /******************************* Byte Order ***********************************/
 117 #define ahc_htobe16(x)  cpu_to_be16(x)
 118 #define ahc_htobe32(x)  cpu_to_be32(x)
 119 #define ahc_htobe64(x)  cpu_to_be64(x)
 120 #define ahc_htole16(x)  cpu_to_le16(x)
 121 #define ahc_htole32(x)  cpu_to_le32(x)
 122 #define ahc_htole64(x)  cpu_to_le64(x)
 123
 124 #define ahc_be16toh(x)  be16_to_cpu(x)
 125 #define ahc_be32toh(x)  be32_to_cpu(x)
 126 #define ahc_be64toh(x)  be64_to_cpu(x)
 127 #define ahc_le16toh(x)  le16_to_cpu(x)
 128 #define ahc_le32toh(x)  le32_to_cpu(x)
 129 #define ahc_le64toh(x)  le64_to_cpu(x)
 130
 131 /************************* Configuration Data *********************************/
 132 extern u_int aic7xxx_no_probe;
 133 extern u_int aic7xxx_allow_memio;
 134 extern struct scsi_host_template aic7xxx_driver_template;
 135
 136 /***************************** Bus Space/DMA **********************************/
 137
 138 typedef uint32_t bus_size_t;
 139
 140 typedef enum {
 141         BUS_SPACE_MEMIO,
 142         BUS_SPACE_PIO
 143 } bus_space_tag_t;
 144
 145 typedef union {
 146         u_long            ioport;
 147         volatile uint8_t __iomem *maddr;
 148 } bus_space_handle_t;
 149
 150 typedef struct bus_dma_segment
 151 {
 152         dma_addr_t      ds_addr;
 153         bus_size_t      ds_len;
 154 } bus_dma_segment_t;
 155
 156 struct ahc_linux_dma_tag
 157 {
 158         bus_size_t      alignment;
 159         bus_size_t      boundary;
 160         bus_size_t      maxsize;
 161 };
 162 typedef struct ahc_linux_dma_tag* bus_dma_tag_t;
 163
 164 typedef dma_addr_t bus_dmamap_t;
 165
 166 typedef int bus_dma_filter_t(void*, dma_addr_t);
 167 typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
 168
 169 #define BUS_DMA_WAITOK          0x0
 170 #define BUS_DMA_NOWAIT          0x1
 171 #define BUS_DMA_ALLOCNOW        0x2
 172 #define BUS_DMA_LOAD_SEGS       0x4     /*
 173                                          * Argument is an S/G list not
 174                                          * a single buffer.
 175                                          */
 176
 177 #define BUS_SPACE_MAXADDR       0xFFFFFFFF
 178 #define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
 179 #define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
 180
 181 int     ahc_dma_tag_create(struct ahc_softc *, bus_dma_tag_t /*parent*/,
 182                            bus_size_t /*alignment*/, bus_size_t /*boundary*/,
 183                            dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
 184                            bus_dma_filter_t*/*filter*/, void */*filterarg*/,
 185                            bus_size_t /*maxsize*/, int /*nsegments*/,
 186                            bus_size_t /*maxsegsz*/, int /*flags*/,
 187                            bus_dma_tag_t */*dma_tagp*/);
 188
 189 void    ahc_dma_tag_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/);
 190
 191 int     ahc_dmamem_alloc(struct ahc_softc *, bus_dma_tag_t /*dmat*/,
 192                          void** /*vaddr*/, int /*flags*/,
 193                          bus_dmamap_t* /*mapp*/);
 194
 195 void    ahc_dmamem_free(struct ahc_softc *, bus_dma_tag_t /*dmat*/,
 196                         void* /*vaddr*/, bus_dmamap_t /*map*/);
 197
 198 void    ahc_dmamap_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/,
 199                            bus_dmamap_t /*map*/);
 200
 201 int     ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t /*dmat*/,
 202                         bus_dmamap_t /*map*/, void * /*buf*/,
 203                         bus_size_t /*buflen*/, bus_dmamap_callback_t *,
 204                         void */*callback_arg*/, int /*flags*/);
 205
 206 int     ahc_dmamap_unload(struct ahc_softc *, bus_dma_tag_t, bus_dmamap_t);
 207
 208 /*
 209  * Operations performed by ahc_dmamap_sync().
 210  */
 211 #define BUS_DMASYNC_PREREAD     0x01    /* pre-read synchronization */
 212 #define BUS_DMASYNC_POSTREAD    0x02    /* post-read synchronization */
 213 #define BUS_DMASYNC_PREWRITE    0x04    /* pre-write synchronization */
 214 #define BUS_DMASYNC_POSTWRITE   0x08    /* post-write synchronization */
 215
 216 /*
 217  * XXX
 218  * ahc_dmamap_sync is only used on buffers allocated with
 219  * the pci_alloc_consistent() API.  Although I'm not sure how
 220  * this works on architectures with a write buffer, Linux does
 221  * not have an API to sync "coherent" memory.  Perhaps we need
 222  * to do an mb()?
 223  */
 224 #define ahc_dmamap_sync(ahc, dma_tag, dmamap, offset, len, op)
 225
 226 /********************************** Includes **********************************/
 227 #ifdef CONFIG_AIC7XXX_REG_PRETTY_PRINT
 228 #define AIC_DEBUG_REGISTERS 1
 229 #else
 230 #define AIC_DEBUG_REGISTERS 0
 231 #endif
 232 #include "aic7xxx.h"
 233
 234 /***************************** Timer Facilities *******************************/
 235 static __inline void
 236 ahc_scb_timer_reset(struct scb *scb, u_int usec)
 237 {
 238 }
 239
 240 /***************************** SMP support ************************************/
 241 #include <linux/spinlock.h>
 242
 243 #define AIC7XXX_DRIVER_VERSION "7.0"
 244
 245 /*************************** Device Data Structures ***************************/
 246 /*
 247  * A per probed device structure used to deal with some error recovery
 248  * scenarios that the Linux mid-layer code just doesn't know how to
 249  * handle.  The structure allocated for a device only becomes persistent
 250  * after a successfully completed inquiry command to the target when
 251  * that inquiry data indicates a lun is present.
 252  */
 253 typedef enum {
 254         AHC_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
 255         AHC_DEV_Q_BASIC          = 0x10, /* Allow basic device queuing */
 256         AHC_DEV_Q_TAGGED         = 0x20, /* Allow full SCSI2 command queueing */
 257         AHC_DEV_PERIODIC_OTAG    = 0x40, /* Send OTAG to prevent starvation */
 258 } ahc_linux_dev_flags;
 259
 260 struct ahc_linux_target;
 261 struct ahc_linux_device {
 262         /*
 263          * The number of transactions currently
 264          * queued to the device.
 265          */
 266         int                     active;
 267
 268         /*
 269          * The currently allowed number of
 270          * transactions that can be queued to
 271          * the device.  Must be signed for
 272          * conversion from tagged to untagged
 273          * mode where the device may have more
 274          * than one outstanding active transaction.
 275          */
 276         int                     openings;
 277
 278         /*
 279          * A positive count indicates that this
 280          * device's queue is halted.
 281          */
 282         u_int                   qfrozen;
 283
 284         /*
 285          * Cumulative command counter.
 286          */
 287         u_long                  commands_issued;
 288
 289         /*
 290          * The number of tagged transactions when
 291          * running at our current opening level
 292          * that have been successfully received by
 293          * this device since the last QUEUE FULL.
 294          */
 295         u_int                   tag_success_count;
 296 #define AHC_TAG_SUCCESS_INTERVAL 50
 297
 298         ahc_linux_dev_flags     flags;
 299
 300         /*
 301          * The high limit for the tags variable.
 302          */
 303         u_int                   maxtags;
 304
 305         /*
 306          * The computed number of tags outstanding
 307          * at the time of the last QUEUE FULL event.
 308          */
 309         u_int                   tags_on_last_queuefull;
 310
 311         /*
 312          * How many times we have seen a queue full
 313          * with the same number of tags.  This is used
 314          * to stop our adaptive queue depth algorithm
 315          * on devices with a fixed number of tags.
 316          */
 317         u_int                   last_queuefull_same_count;
 318 #define AHC_LOCK_TAGS_COUNT 50
 319
 320         /*
 321          * How many transactions have been queued
 322          * without the device going idle.  We use
 323          * this statistic to determine when to issue
 324          * an ordered tag to prevent transaction
 325          * starvation.  This statistic is only updated
 326          * if the AHC_DEV_PERIODIC_OTAG flag is set
 327          * on this device.
 328          */
 329         u_int                   commands_since_idle_or_otag;
 330 #define AHC_OTAG_THRESH 500
 331 };
 332
 333 struct ahc_linux_target {
 334         struct scsi_device       *sdev[AHC_NUM_LUNS];
 335         struct ahc_transinfo      last_tinfo;
 336         struct ahc_softc         *ahc;
 337 };
 338
 339 /********************* Definitions Required by the Core ***********************/
 340 /*
 341  * Number of SG segments we require.  So long as the S/G segments for
 342  * a particular transaction are allocated in a physically contiguous
 343  * manner and are allocated below 4GB, the number of S/G segments is
 344  * unrestricted.
 345  */
 346 #define AHC_NSEG 128
 347
 348 /*
 349  * Per-SCB OSM storage.
 350  */
 351 struct scb_platform_data {
 352         struct ahc_linux_device *dev;
 353         dma_addr_t               buf_busaddr;
 354         uint32_t                 xfer_len;
 355         uint32_t                 sense_resid;   /* Auto-Sense residual */
 356 };
 357
 358 /*
 359  * Define a structure used for each host adapter.  All members are
 360  * aligned on a boundary >= the size of the member to honor the
 361  * alignment restrictions of the various platforms supported by
 362  * this driver.
 363  */
 364 struct ahc_platform_data {
 365         /*
 366          * Fields accessed from interrupt context.
 367          */
 368         struct scsi_target *starget[AHC_NUM_TARGETS];
 369
 370         spinlock_t               spin_lock;
 371         u_int                    qfrozen;
 372         struct completion       *eh_done;
 373         struct Scsi_Host        *host;          /* pointer to scsi host */
 374 #define AHC_LINUX_NOIRQ ((uint32_t)~0)
 375         uint32_t                 irq;           /* IRQ for this adapter */
 376         uint32_t                 bios_address;
 377         uint32_t                 mem_busaddr;   /* Mem Base Addr */
 378 };
 379
 380 /************************** OS Utility Wrappers *******************************/
 381 #define printf printk
 382 #define M_NOWAIT GFP_ATOMIC
 383 #define M_WAITOK 0
 384 #define malloc(size, type, flags) kmalloc(size, flags)
 385 #define free(ptr, type) kfree(ptr)
 386
 387 static __inline void ahc_delay(long);
 388 static __inline void
 389 ahc_delay(long usec)
 390 {
 391         /*
 392          * udelay on Linux can have problems for
 393          * multi-millisecond waits.  Wait at most
 394          * 1024us per call.
 395          */
 396         while (usec > 0) {
 397                 udelay(usec % 1024);
 398                 usec -= 1024;
 399         }
 400 }
 401
 402
 403 /***************************** Low Level I/O **********************************/
 404 static __inline uint8_t ahc_inb(struct ahc_softc * ahc, long port);
 405 static __inline void ahc_outb(struct ahc_softc * ahc, long port, uint8_t val);
 406 static __inline void ahc_outsb(struct ahc_softc * ahc, long port,
 407                                uint8_t *, int count);
 408 static __inline void ahc_insb(struct ahc_softc * ahc, long port,
 409                                uint8_t *, int count);
 410
 411 static __inline uint8_t
 412 ahc_inb(struct ahc_softc * ahc, long port)
 413 {
 414         uint8_t x;
 415
 416         if (ahc->tag == BUS_SPACE_MEMIO) {
 417                 x = readb(ahc->bsh.maddr + port);
 418         } else {
 419                 x = inb(ahc->bsh.ioport + port);
 420         }
 421         mb();
 422         return (x);
 423 }
 424
 425 static __inline void
 426 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
 427 {
 428         if (ahc->tag == BUS_SPACE_MEMIO) {
 429                 writeb(val, ahc->bsh.maddr + port);
 430         } else {
 431                 outb(val, ahc->bsh.ioport + port);
 432         }
 433         mb();
 434 }
 435
 436 static __inline void
 437 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
 438 {
 439         int i;
 440
 441         /*
 442          * There is probably a more efficient way to do this on Linux
 443          * but we don't use this for anything speed critical and this
 444          * should work.
 445          */
 446         for (i = 0; i < count; i++)
 447                 ahc_outb(ahc, port, *array++);
 448 }
 449
 450 static __inline void
 451 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
 452 {
 453         int i;
 454
 455         /*
 456          * There is probably a more efficient way to do this on Linux
 457          * but we don't use this for anything speed critical and this
 458          * should work.
 459          */
 460         for (i = 0; i < count; i++)
 461                 *array++ = ahc_inb(ahc, port);
 462 }
 463
 464 /**************************** Initialization **********************************/
 465 int             ahc_linux_register_host(struct ahc_softc *,
 466                                         struct scsi_host_template *);
 467
 468 /*************************** Pretty Printing **********************************/
 469 struct info_str {
 470         char *buffer;
 471         int length;
 472         off_t offset;
 473         int pos;
 474 };
 475
 476 void    ahc_format_transinfo(struct info_str *info,
 477                              struct ahc_transinfo *tinfo);
 478
 479 /******************************** Locking *************************************/
 480 /* Lock protecting internal data structures */
 481
 482 static __inline void
 483 ahc_lockinit(struct ahc_softc *ahc)
 484 {
 485         spin_lock_init(&ahc->platform_data->spin_lock);
 486 }
 487
 488 static __inline void
 489 ahc_lock(struct ahc_softc *ahc, unsigned long *flags)
 490 {
 491         spin_lock_irqsave(&ahc->platform_data->spin_lock, *flags);
 492 }
 493
 494 static __inline void
 495 ahc_unlock(struct ahc_softc *ahc, unsigned long *flags)
 496 {
 497         spin_unlock_irqrestore(&ahc->platform_data->spin_lock, *flags);
 498 }
 499
 500 /******************************* PCI Definitions ******************************/
 501 /*
 502  * PCIM_xxx: mask to locate subfield in register
 503  * PCIR_xxx: config register offset
 504  * PCIC_xxx: device class
 505  * PCIS_xxx: device subclass
 506  * PCIP_xxx: device programming interface
 507  * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
 508  * PCID_xxx: device ID
 509  */
 510 #define PCIR_DEVVENDOR          0x00
 511 #define PCIR_VENDOR             0x00
 512 #define PCIR_DEVICE             0x02
 513 #define PCIR_COMMAND            0x04
 514 #define PCIM_CMD_PORTEN         0x0001
 515 #define PCIM_CMD_MEMEN          0x0002
 516 #define PCIM_CMD_BUSMASTEREN    0x0004
 517 #define PCIM_CMD_MWRICEN        0x0010
 518 #define PCIM_CMD_PERRESPEN      0x0040
 519 #define PCIM_CMD_SERRESPEN      0x0100
 520 #define PCIR_STATUS             0x06
 521 #define PCIR_REVID              0x08
 522 #define PCIR_PROGIF             0x09
 523 #define PCIR_SUBCLASS           0x0a
 524 #define PCIR_CLASS              0x0b
 525 #define PCIR_CACHELNSZ          0x0c
 526 #define PCIR_LATTIMER           0x0d
 527 #define PCIR_HEADERTYPE         0x0e
 528 #define PCIM_MFDEV              0x80
 529 #define PCIR_BIST               0x0f
 530 #define PCIR_CAP_PTR            0x34
 531
 532 /* config registers for header type 0 devices */
 533 #define PCIR_MAPS       0x10
 534 #define PCIR_SUBVEND_0  0x2c
 535 #define PCIR_SUBDEV_0   0x2e
 536
 537 extern struct pci_driver aic7xxx_pci_driver;
 538
 539 typedef enum
 540 {
 541         AHC_POWER_STATE_D0,
 542         AHC_POWER_STATE_D1,
 543         AHC_POWER_STATE_D2,
 544         AHC_POWER_STATE_D3
 545 } ahc_power_state;
 546
 547 /**************************** VL/EISA Routines ********************************/
 548 #ifdef CONFIG_EISA
 549 int                      ahc_linux_eisa_init(void);
 550 void                     ahc_linux_eisa_exit(void);
 551 int                      aic7770_map_registers(struct ahc_softc *ahc,
 552                                                u_int port);
 553 int                      aic7770_map_int(struct ahc_softc *ahc, u_int irq);
 554 #else
 555 static inline int       ahc_linux_eisa_init(void) {
 556         return -ENODEV;
 557 }
 558 static inline void      ahc_linux_eisa_exit(void) {
 559 }
 560 #endif
 561
 562 /******************************* PCI Routines *********************************/
 563 #ifdef CONFIG_PCI
 564 int                      ahc_linux_pci_init(void);
 565 void                     ahc_linux_pci_exit(void);
 566 int                      ahc_pci_map_registers(struct ahc_softc *ahc);
 567 int                      ahc_pci_map_int(struct ahc_softc *ahc);
 568
 569 static __inline uint32_t ahc_pci_read_config(ahc_dev_softc_t pci,
 570                                              int reg, int width);
 571
 572 static __inline uint32_t
 573 ahc_pci_read_config(ahc_dev_softc_t pci, int reg, int width)
 574 {
 575         switch (width) {
 576         case 1:
 577         {
 578                 uint8_t retval;
 579
 580                 pci_read_config_byte(pci, reg, &retval);
 581                 return (retval);
 582         }
 583         case 2:
 584         {
 585                 uint16_t retval;
 586                 pci_read_config_word(pci, reg, &retval);
 587                 return (retval);
 588         }
 589         case 4:
 590         {
 591                 uint32_t retval;
 592                 pci_read_config_dword(pci, reg, &retval);
 593                 return (retval);
 594         }
 595         default:
 596                 panic("ahc_pci_read_config: Read size too big");
 597                 /* NOTREACHED */
 598                 return (0);
 599         }
 600 }
 601
 602 static __inline void ahc_pci_write_config(ahc_dev_softc_t pci,
 603                                           int reg, uint32_t value,
 604                                           int width);
 605
 606 static __inline void
 607 ahc_pci_write_config(ahc_dev_softc_t pci, int reg, uint32_t value, int width)
 608 {
 609         switch (width) {
 610         case 1:
 611                 pci_write_config_byte(pci, reg, value);
 612                 break;
 613         case 2:
 614                 pci_write_config_word(pci, reg, value);
 615                 break;
 616         case 4:
 617                 pci_write_config_dword(pci, reg, value);
 618                 break;
 619         default:
 620                 panic("ahc_pci_write_config: Write size too big");
 621                 /* NOTREACHED */
 622         }
 623 }
 624
 625 static __inline int ahc_get_pci_function(ahc_dev_softc_t);
 626 static __inline int
 627 ahc_get_pci_function(ahc_dev_softc_t pci)
 628 {
 629         return (PCI_FUNC(pci->devfn));
 630 }
 631
 632 static __inline int ahc_get_pci_slot(ahc_dev_softc_t);
 633 static __inline int
 634 ahc_get_pci_slot(ahc_dev_softc_t pci)
 635 {
 636         return (PCI_SLOT(pci->devfn));
 637 }
 638
 639 static __inline int ahc_get_pci_bus(ahc_dev_softc_t);
 640 static __inline int
 641 ahc_get_pci_bus(ahc_dev_softc_t pci)
 642 {
 643         return (pci->bus->number);
 644 }
 645 #else
 646 static inline int ahc_linux_pci_init(void) {
 647         return 0;
 648 }
 649 static inline void ahc_linux_pci_exit(void) {
 650 }
 651 #endif
 652
 653 static __inline void ahc_flush_device_writes(struct ahc_softc *);
 654 static __inline void
 655 ahc_flush_device_writes(struct ahc_softc *ahc)
 656 {
 657         /* XXX Is this sufficient for all architectures??? */
 658         ahc_inb(ahc, INTSTAT);
 659 }
 660
 661 /**************************** Proc FS Support *********************************/
 662 int     ahc_linux_proc_info(struct Scsi_Host *, char *, char **,
 663                             off_t, int, int);
 664
 665 /*************************** Domain Validation ********************************/
 666 /*********************** Transaction Access Wrappers *************************/
 667 static __inline void ahc_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
 668 static __inline void ahc_set_transaction_status(struct scb *, uint32_t);
 669 static __inline void ahc_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
 670 static __inline void ahc_set_scsi_status(struct scb *, uint32_t);
 671 static __inline uint32_t ahc_cmd_get_transaction_status(struct scsi_cmnd *cmd);
 672 static __inline uint32_t ahc_get_transaction_status(struct scb *);
 673 static __inline uint32_t ahc_cmd_get_scsi_status(struct scsi_cmnd *cmd);
 674 static __inline uint32_t ahc_get_scsi_status(struct scb *);
 675 static __inline void ahc_set_transaction_tag(struct scb *, int, u_int);
 676 static __inline u_long ahc_get_transfer_length(struct scb *);
 677 static __inline int ahc_get_transfer_dir(struct scb *);
 678 static __inline void ahc_set_residual(struct scb *, u_long);
 679 static __inline void ahc_set_sense_residual(struct scb *scb, u_long resid);
 680 static __inline u_long ahc_get_residual(struct scb *);
 681 static __inline u_long ahc_get_sense_residual(struct scb *);
 682 static __inline int ahc_perform_autosense(struct scb *);
 683 static __inline uint32_t ahc_get_sense_bufsize(struct ahc_softc *,
 684                                                struct scb *);
 685 static __inline void ahc_notify_xfer_settings_change(struct ahc_softc *,
 686                                                      struct ahc_devinfo *);
 687 static __inline void ahc_platform_scb_free(struct ahc_softc *ahc,
 688                                            struct scb *scb);
 689 static __inline void ahc_freeze_scb(struct scb *scb);
 690
 691 static __inline
 692 void ahc_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
 693 {
 694         cmd->result &= ~(CAM_STATUS_MASK << 16);
 695         cmd->result |= status << 16;
 696 }
 697
 698 static __inline
 699 void ahc_set_transaction_status(struct scb *scb, uint32_t status)
 700 {
 701         ahc_cmd_set_transaction_status(scb->io_ctx,status);
 702 }
 703
 704 static __inline
 705 void ahc_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
 706 {
 707         cmd->result &= ~0xFFFF;
 708         cmd->result |= status;
 709 }
 710
 711 static __inline
 712 void ahc_set_scsi_status(struct scb *scb, uint32_t status)
 713 {
 714         ahc_cmd_set_scsi_status(scb->io_ctx, status);
 715 }
 716
 717 static __inline
 718 uint32_t ahc_cmd_get_transaction_status(struct scsi_cmnd *cmd)
 719 {
 720         return ((cmd->result >> 16) & CAM_STATUS_MASK);
 721 }
 722
 723 static __inline
 724 uint32_t ahc_get_transaction_status(struct scb *scb)
 725 {
 726         return (ahc_cmd_get_transaction_status(scb->io_ctx));
 727 }
 728
 729 static __inline
 730 uint32_t ahc_cmd_get_scsi_status(struct scsi_cmnd *cmd)
 731 {
 732         return (cmd->result & 0xFFFF);
 733 }
 734
 735 static __inline
 736 uint32_t ahc_get_scsi_status(struct scb *scb)
 737 {
 738         return (ahc_cmd_get_scsi_status(scb->io_ctx));
 739 }
 740
 741 static __inline
 742 void ahc_set_transaction_tag(struct scb *scb, int enabled, u_int type)
 743 {
 744         /*
 745          * Nothing to do for linux as the incoming transaction
 746          * has no concept of tag/non tagged, etc.
 747          */
 748 }
 749
 750 static __inline
 751 u_long ahc_get_transfer_length(struct scb *scb)
 752 {
 753         return (scb->platform_data->xfer_len);
 754 }
 755
 756 static __inline
 757 int ahc_get_transfer_dir(struct scb *scb)
 758 {
 759         return (scb->io_ctx->sc_data_direction);
 760 }
 761
 762 static __inline
 763 void ahc_set_residual(struct scb *scb, u_long resid)
 764 {
 765         scb->io_ctx->resid = resid;
 766 }
 767
 768 static __inline
 769 void ahc_set_sense_residual(struct scb *scb, u_long resid)
 770 {
 771         scb->platform_data->sense_resid = resid;
 772 }
 773
 774 static __inline
 775 u_long ahc_get_residual(struct scb *scb)
 776 {
 777         return (scb->io_ctx->resid);
 778 }
 779
 780 static __inline
 781 u_long ahc_get_sense_residual(struct scb *scb)
 782 {
 783         return (scb->platform_data->sense_resid);
 784 }
 785
 786 static __inline
 787 int ahc_perform_autosense(struct scb *scb)
 788 {
 789         /*
 790          * We always perform autosense in Linux.
 791          * On other platforms this is set on a
 792          * per-transaction basis.
 793          */
 794         return (1);
 795 }
 796
 797 static __inline uint32_t
 798 ahc_get_sense_bufsize(struct ahc_softc *ahc, struct scb *scb)
 799 {
 800         return (sizeof(struct scsi_sense_data));
 801 }
 802
 803 static __inline void
 804 ahc_notify_xfer_settings_change(struct ahc_softc *ahc,
 805                                 struct ahc_devinfo *devinfo)
 806 {
 807         /* Nothing to do here for linux */
 808 }
 809
 810 static __inline void
 811 ahc_platform_scb_free(struct ahc_softc *ahc, struct scb *scb)
 812 {
 813 }
 814
 815 int     ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg);
 816 void    ahc_platform_free(struct ahc_softc *ahc);
 817 void    ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb);
 818
 819 static __inline void
 820 ahc_freeze_scb(struct scb *scb)
 821 {
 822         if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
 823                 scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
 824                 scb->platform_data->dev->qfrozen++;
 825         }
 826 }
 827
 828 void    ahc_platform_set_tags(struct ahc_softc *ahc,
 829                               struct ahc_devinfo *devinfo, ahc_queue_alg);
 830 int     ahc_platform_abort_scbs(struct ahc_softc *ahc, int target,
 831                                 char channel, int lun, u_int tag,
 832                                 role_t role, uint32_t status);
 833 irqreturn_t
 834         ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs);
 835 void    ahc_platform_flushwork(struct ahc_softc *ahc);
 836 void    ahc_done(struct ahc_softc*, struct scb*);
 837 void    ahc_send_async(struct ahc_softc *, char channel,
 838                        u_int target, u_int lun, ac_code, void *);
 839 void    ahc_print_path(struct ahc_softc *, struct scb *);
 840 void    ahc_platform_dump_card_state(struct ahc_softc *ahc);
 841
 842 #ifdef CONFIG_PCI
 843 #define AHC_PCI_CONFIG 1
 844 #else
 845 #define AHC_PCI_CONFIG 0
 846 #endif
 847 #define bootverbose aic7xxx_verbose
 848 extern u_int aic7xxx_verbose;
 849 #endif /* _AIC7XXX_LINUX_H_ */