linux/drivers/scsi/aic7xxx/aic7xxx_osm.h
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   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/types.h>
  63#include <linux/blkdev.h>
  64#include <linux/delay.h>
  65#include <linux/ioport.h>
  66#include <linux/pci.h>
  67#include <linux/interrupt.h>
  68#include <linux/module.h>
  69#include <linux/slab.h>
  70#include <asm/byteorder.h>
  71#include <asm/io.h>
  72
  73#include <scsi/scsi.h>
  74#include <scsi/scsi_cmnd.h>
  75#include <scsi/scsi_eh.h>
  76#include <scsi/scsi_device.h>
  77#include <scsi/scsi_host.h>
  78#include <scsi/scsi_tcq.h>
  79#include <scsi/scsi_transport.h>
  80#include <scsi/scsi_transport_spi.h>
  81
  82/* Core SCSI definitions */
  83#define AIC_LIB_PREFIX ahc
  84
  85/* Name space conflict with BSD queue macros */
  86#ifdef LIST_HEAD
  87#undef LIST_HEAD
  88#endif
  89
  90#include "cam.h"
  91#include "queue.h"
  92#include "scsi_message.h"
  93#include "aiclib.h"
  94
  95/*********************************** Debugging ********************************/
  96#ifdef CONFIG_AIC7XXX_DEBUG_ENABLE
  97#ifdef CONFIG_AIC7XXX_DEBUG_MASK
  98#define AHC_DEBUG 1
  99#define AHC_DEBUG_OPTS CONFIG_AIC7XXX_DEBUG_MASK
 100#else
 101/*
 102 * Compile in debugging code, but do not enable any printfs.
 103 */
 104#define AHC_DEBUG 1
 105#endif
 106/* No debugging code. */
 107#endif
 108
 109/************************* Forward Declarations *******************************/
 110struct ahc_softc;
 111typedef struct pci_dev *ahc_dev_softc_t;
 112typedef struct scsi_cmnd      *ahc_io_ctx_t;
 113
 114/******************************* Byte Order ***********************************/
 115#define ahc_htobe16(x)  cpu_to_be16(x)
 116#define ahc_htobe32(x)  cpu_to_be32(x)
 117#define ahc_htobe64(x)  cpu_to_be64(x)
 118#define ahc_htole16(x)  cpu_to_le16(x)
 119#define ahc_htole32(x)  cpu_to_le32(x)
 120#define ahc_htole64(x)  cpu_to_le64(x)
 121
 122#define ahc_be16toh(x)  be16_to_cpu(x)
 123#define ahc_be32toh(x)  be32_to_cpu(x)
 124#define ahc_be64toh(x)  be64_to_cpu(x)
 125#define ahc_le16toh(x)  le16_to_cpu(x)
 126#define ahc_le32toh(x)  le32_to_cpu(x)
 127#define ahc_le64toh(x)  le64_to_cpu(x)
 128
 129/************************* Configuration Data *********************************/
 130extern u_int aic7xxx_no_probe;
 131extern u_int aic7xxx_allow_memio;
 132extern struct scsi_host_template aic7xxx_driver_template;
 133
 134/***************************** Bus Space/DMA **********************************/
 135
 136typedef uint32_t bus_size_t;
 137
 138typedef enum {
 139        BUS_SPACE_MEMIO,
 140        BUS_SPACE_PIO
 141} bus_space_tag_t;
 142
 143typedef union {
 144        u_long            ioport;
 145        volatile uint8_t __iomem *maddr;
 146} bus_space_handle_t;
 147
 148typedef struct bus_dma_segment
 149{
 150        dma_addr_t      ds_addr;
 151        bus_size_t      ds_len;
 152} bus_dma_segment_t;
 153
 154struct ahc_linux_dma_tag
 155{
 156        bus_size_t      alignment;
 157        bus_size_t      boundary;
 158        bus_size_t      maxsize;
 159};
 160typedef struct ahc_linux_dma_tag* bus_dma_tag_t;
 161
 162typedef dma_addr_t bus_dmamap_t;
 163
 164typedef int bus_dma_filter_t(void*, dma_addr_t);
 165typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
 166
 167#define BUS_DMA_WAITOK          0x0
 168#define BUS_DMA_NOWAIT          0x1
 169#define BUS_DMA_ALLOCNOW        0x2
 170#define BUS_DMA_LOAD_SEGS       0x4     /*
 171                                         * Argument is an S/G list not
 172                                         * a single buffer.
 173                                         */
 174
 175#define BUS_SPACE_MAXADDR       0xFFFFFFFF
 176#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
 177#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
 178
 179int     ahc_dma_tag_create(struct ahc_softc *, bus_dma_tag_t /*parent*/,
 180                           bus_size_t /*alignment*/, bus_size_t /*boundary*/,
 181                           dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
 182                           bus_dma_filter_t*/*filter*/, void */*filterarg*/,
 183                           bus_size_t /*maxsize*/, int /*nsegments*/,
 184                           bus_size_t /*maxsegsz*/, int /*flags*/,
 185                           bus_dma_tag_t */*dma_tagp*/);
 186
 187void    ahc_dma_tag_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/);
 188
 189int     ahc_dmamem_alloc(struct ahc_softc *, bus_dma_tag_t /*dmat*/,
 190                         void** /*vaddr*/, int /*flags*/,
 191                         bus_dmamap_t* /*mapp*/);
 192
 193void    ahc_dmamem_free(struct ahc_softc *, bus_dma_tag_t /*dmat*/,
 194                        void* /*vaddr*/, bus_dmamap_t /*map*/);
 195
 196void    ahc_dmamap_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/,
 197                           bus_dmamap_t /*map*/);
 198
 199int     ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t /*dmat*/,
 200                        bus_dmamap_t /*map*/, void * /*buf*/,
 201                        bus_size_t /*buflen*/, bus_dmamap_callback_t *,
 202                        void */*callback_arg*/, int /*flags*/);
 203
 204int     ahc_dmamap_unload(struct ahc_softc *, bus_dma_tag_t, bus_dmamap_t);
 205
 206/*
 207 * Operations performed by ahc_dmamap_sync().
 208 */
 209#define BUS_DMASYNC_PREREAD     0x01    /* pre-read synchronization */
 210#define BUS_DMASYNC_POSTREAD    0x02    /* post-read synchronization */
 211#define BUS_DMASYNC_PREWRITE    0x04    /* pre-write synchronization */
 212#define BUS_DMASYNC_POSTWRITE   0x08    /* post-write synchronization */
 213
 214/*
 215 * XXX
 216 * ahc_dmamap_sync is only used on buffers allocated with
 217 * the pci_alloc_consistent() API.  Although I'm not sure how
 218 * this works on architectures with a write buffer, Linux does
 219 * not have an API to sync "coherent" memory.  Perhaps we need
 220 * to do an mb()?
 221 */
 222#define ahc_dmamap_sync(ahc, dma_tag, dmamap, offset, len, op)
 223
 224/********************************** Includes **********************************/
 225#ifdef CONFIG_AIC7XXX_REG_PRETTY_PRINT
 226#define AIC_DEBUG_REGISTERS 1
 227#else
 228#define AIC_DEBUG_REGISTERS 0
 229#endif
 230#include "aic7xxx.h"
 231
 232/***************************** Timer Facilities *******************************/
 233static inline void
 234ahc_scb_timer_reset(struct scb *scb, u_int usec)
 235{
 236}
 237
 238/***************************** SMP support ************************************/
 239#include <linux/spinlock.h>
 240
 241#define AIC7XXX_DRIVER_VERSION "7.0"
 242
 243/*************************** Device Data Structures ***************************/
 244/*
 245 * A per probed device structure used to deal with some error recovery
 246 * scenarios that the Linux mid-layer code just doesn't know how to
 247 * handle.  The structure allocated for a device only becomes persistent
 248 * after a successfully completed inquiry command to the target when
 249 * that inquiry data indicates a lun is present.
 250 */
 251typedef enum {
 252        AHC_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
 253        AHC_DEV_Q_BASIC          = 0x10, /* Allow basic device queuing */
 254        AHC_DEV_Q_TAGGED         = 0x20, /* Allow full SCSI2 command queueing */
 255        AHC_DEV_PERIODIC_OTAG    = 0x40, /* Send OTAG to prevent starvation */
 256} ahc_linux_dev_flags;
 257
 258struct ahc_linux_device {
 259        /*
 260         * The number of transactions currently
 261         * queued to the device.
 262         */
 263        int                     active;
 264
 265        /*
 266         * The currently allowed number of 
 267         * transactions that can be queued to
 268         * the device.  Must be signed for
 269         * conversion from tagged to untagged
 270         * mode where the device may have more
 271         * than one outstanding active transaction.
 272         */
 273        int                     openings;
 274
 275        /*
 276         * A positive count indicates that this
 277         * device's queue is halted.
 278         */
 279        u_int                   qfrozen;
 280        
 281        /*
 282         * Cumulative command counter.
 283         */
 284        u_long                  commands_issued;
 285
 286        /*
 287         * The number of tagged transactions when
 288         * running at our current opening level
 289         * that have been successfully received by
 290         * this device since the last QUEUE FULL.
 291         */
 292        u_int                   tag_success_count;
 293#define AHC_TAG_SUCCESS_INTERVAL 50
 294
 295        ahc_linux_dev_flags     flags;
 296
 297        /*
 298         * The high limit for the tags variable.
 299         */
 300        u_int                   maxtags;
 301
 302        /*
 303         * The computed number of tags outstanding
 304         * at the time of the last QUEUE FULL event.
 305         */
 306        u_int                   tags_on_last_queuefull;
 307
 308        /*
 309         * How many times we have seen a queue full
 310         * with the same number of tags.  This is used
 311         * to stop our adaptive queue depth algorithm
 312         * on devices with a fixed number of tags.
 313         */
 314        u_int                   last_queuefull_same_count;
 315#define AHC_LOCK_TAGS_COUNT 50
 316
 317        /*
 318         * How many transactions have been queued
 319         * without the device going idle.  We use
 320         * this statistic to determine when to issue
 321         * an ordered tag to prevent transaction
 322         * starvation.  This statistic is only updated
 323         * if the AHC_DEV_PERIODIC_OTAG flag is set
 324         * on this device.
 325         */
 326        u_int                   commands_since_idle_or_otag;
 327#define AHC_OTAG_THRESH 500
 328};
 329
 330/********************* Definitions Required by the Core ***********************/
 331/*
 332 * Number of SG segments we require.  So long as the S/G segments for
 333 * a particular transaction are allocated in a physically contiguous
 334 * manner and are allocated below 4GB, the number of S/G segments is
 335 * unrestricted.
 336 */
 337#define AHC_NSEG 128
 338
 339/*
 340 * Per-SCB OSM storage.
 341 */
 342struct scb_platform_data {
 343        struct ahc_linux_device *dev;
 344        dma_addr_t               buf_busaddr;
 345        uint32_t                 xfer_len;
 346        uint32_t                 sense_resid;   /* Auto-Sense residual */
 347};
 348
 349/*
 350 * Define a structure used for each host adapter.  All members are
 351 * aligned on a boundary >= the size of the member to honor the
 352 * alignment restrictions of the various platforms supported by
 353 * this driver.
 354 */
 355struct ahc_platform_data {
 356        /*
 357         * Fields accessed from interrupt context.
 358         */
 359        struct scsi_target *starget[AHC_NUM_TARGETS]; 
 360
 361        spinlock_t               spin_lock;
 362        u_int                    qfrozen;
 363        struct completion       *eh_done;
 364        struct Scsi_Host        *host;          /* pointer to scsi host */
 365#define AHC_LINUX_NOIRQ ((uint32_t)~0)
 366        uint32_t                 irq;           /* IRQ for this adapter */
 367        uint32_t                 bios_address;
 368        resource_size_t          mem_busaddr;   /* Mem Base Addr */
 369};
 370
 371void ahc_delay(long);
 372
 373
 374/***************************** Low Level I/O **********************************/
 375uint8_t ahc_inb(struct ahc_softc * ahc, long port);
 376void ahc_outb(struct ahc_softc * ahc, long port, uint8_t val);
 377void ahc_outsb(struct ahc_softc * ahc, long port,
 378               uint8_t *, int count);
 379void ahc_insb(struct ahc_softc * ahc, long port,
 380               uint8_t *, int count);
 381
 382/**************************** Initialization **********************************/
 383int             ahc_linux_register_host(struct ahc_softc *,
 384                                        struct scsi_host_template *);
 385
 386/******************************** Locking *************************************/
 387/* Lock protecting internal data structures */
 388
 389static inline void
 390ahc_lockinit(struct ahc_softc *ahc)
 391{
 392        spin_lock_init(&ahc->platform_data->spin_lock);
 393}
 394
 395static inline void
 396ahc_lock(struct ahc_softc *ahc, unsigned long *flags)
 397{
 398        spin_lock_irqsave(&ahc->platform_data->spin_lock, *flags);
 399}
 400
 401static inline void
 402ahc_unlock(struct ahc_softc *ahc, unsigned long *flags)
 403{
 404        spin_unlock_irqrestore(&ahc->platform_data->spin_lock, *flags);
 405}
 406
 407/******************************* PCI Definitions ******************************/
 408/*
 409 * PCIM_xxx: mask to locate subfield in register
 410 * PCIR_xxx: config register offset
 411 * PCIC_xxx: device class
 412 * PCIS_xxx: device subclass
 413 * PCIP_xxx: device programming interface
 414 * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
 415 * PCID_xxx: device ID
 416 */
 417#define PCIR_DEVVENDOR          0x00
 418#define PCIR_VENDOR             0x00
 419#define PCIR_DEVICE             0x02
 420#define PCIR_COMMAND            0x04
 421#define PCIM_CMD_PORTEN         0x0001
 422#define PCIM_CMD_MEMEN          0x0002
 423#define PCIM_CMD_BUSMASTEREN    0x0004
 424#define PCIM_CMD_MWRICEN        0x0010
 425#define PCIM_CMD_PERRESPEN      0x0040
 426#define PCIM_CMD_SERRESPEN      0x0100
 427#define PCIR_STATUS             0x06
 428#define PCIR_REVID              0x08
 429#define PCIR_PROGIF             0x09
 430#define PCIR_SUBCLASS           0x0a
 431#define PCIR_CLASS              0x0b
 432#define PCIR_CACHELNSZ          0x0c
 433#define PCIR_LATTIMER           0x0d
 434#define PCIR_HEADERTYPE         0x0e
 435#define PCIM_MFDEV              0x80
 436#define PCIR_BIST               0x0f
 437#define PCIR_CAP_PTR            0x34
 438
 439/* config registers for header type 0 devices */
 440#define PCIR_MAPS       0x10
 441#define PCIR_SUBVEND_0  0x2c
 442#define PCIR_SUBDEV_0   0x2e
 443
 444typedef enum
 445{
 446        AHC_POWER_STATE_D0,
 447        AHC_POWER_STATE_D1,
 448        AHC_POWER_STATE_D2,
 449        AHC_POWER_STATE_D3
 450} ahc_power_state;
 451
 452/**************************** VL/EISA Routines ********************************/
 453#ifdef CONFIG_EISA
 454int                      ahc_linux_eisa_init(void);
 455void                     ahc_linux_eisa_exit(void);
 456int                      aic7770_map_registers(struct ahc_softc *ahc,
 457                                               u_int port);
 458int                      aic7770_map_int(struct ahc_softc *ahc, u_int irq);
 459#else
 460static inline int       ahc_linux_eisa_init(void) {
 461        return -ENODEV;
 462}
 463static inline void      ahc_linux_eisa_exit(void) {
 464}
 465#endif
 466
 467/******************************* PCI Routines *********************************/
 468#ifdef CONFIG_PCI
 469int                      ahc_linux_pci_init(void);
 470void                     ahc_linux_pci_exit(void);
 471int                      ahc_pci_map_registers(struct ahc_softc *ahc);
 472int                      ahc_pci_map_int(struct ahc_softc *ahc);
 473
 474uint32_t                 ahc_pci_read_config(ahc_dev_softc_t pci,
 475                                             int reg, int width);
 476
 477void                     ahc_pci_write_config(ahc_dev_softc_t pci,
 478                                              int reg, uint32_t value,
 479                                              int width);
 480
 481static inline int ahc_get_pci_function(ahc_dev_softc_t);
 482static inline int
 483ahc_get_pci_function(ahc_dev_softc_t pci)
 484{
 485        return (PCI_FUNC(pci->devfn));
 486}
 487
 488static inline int ahc_get_pci_slot(ahc_dev_softc_t);
 489static inline int
 490ahc_get_pci_slot(ahc_dev_softc_t pci)
 491{
 492        return (PCI_SLOT(pci->devfn));
 493}
 494
 495static inline int ahc_get_pci_bus(ahc_dev_softc_t);
 496static inline int
 497ahc_get_pci_bus(ahc_dev_softc_t pci)
 498{
 499        return (pci->bus->number);
 500}
 501#else
 502static inline int ahc_linux_pci_init(void) {
 503        return 0;
 504}
 505static inline void ahc_linux_pci_exit(void) {
 506}
 507#endif
 508
 509static inline void ahc_flush_device_writes(struct ahc_softc *);
 510static inline void
 511ahc_flush_device_writes(struct ahc_softc *ahc)
 512{
 513        /* XXX Is this sufficient for all architectures??? */
 514        ahc_inb(ahc, INTSTAT);
 515}
 516
 517/**************************** Proc FS Support *********************************/
 518int     ahc_proc_write_seeprom(struct Scsi_Host *, char *, int);
 519int     ahc_linux_show_info(struct seq_file *, struct Scsi_Host *);
 520
 521/*************************** Domain Validation ********************************/
 522/*********************** Transaction Access Wrappers *************************/
 523static inline void ahc_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
 524static inline void ahc_set_transaction_status(struct scb *, uint32_t);
 525static inline void ahc_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
 526static inline void ahc_set_scsi_status(struct scb *, uint32_t);
 527static inline uint32_t ahc_cmd_get_transaction_status(struct scsi_cmnd *cmd);
 528static inline uint32_t ahc_get_transaction_status(struct scb *);
 529static inline uint32_t ahc_cmd_get_scsi_status(struct scsi_cmnd *cmd);
 530static inline uint32_t ahc_get_scsi_status(struct scb *);
 531static inline void ahc_set_transaction_tag(struct scb *, int, u_int);
 532static inline u_long ahc_get_transfer_length(struct scb *);
 533static inline int ahc_get_transfer_dir(struct scb *);
 534static inline void ahc_set_residual(struct scb *, u_long);
 535static inline void ahc_set_sense_residual(struct scb *scb, u_long resid);
 536static inline u_long ahc_get_residual(struct scb *);
 537static inline u_long ahc_get_sense_residual(struct scb *);
 538static inline int ahc_perform_autosense(struct scb *);
 539static inline uint32_t ahc_get_sense_bufsize(struct ahc_softc *,
 540                                               struct scb *);
 541static inline void ahc_notify_xfer_settings_change(struct ahc_softc *,
 542                                                     struct ahc_devinfo *);
 543static inline void ahc_platform_scb_free(struct ahc_softc *ahc,
 544                                           struct scb *scb);
 545static inline void ahc_freeze_scb(struct scb *scb);
 546
 547static inline
 548void ahc_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
 549{
 550        cmd->result &= ~(CAM_STATUS_MASK << 16);
 551        cmd->result |= status << 16;
 552}
 553
 554static inline
 555void ahc_set_transaction_status(struct scb *scb, uint32_t status)
 556{
 557        ahc_cmd_set_transaction_status(scb->io_ctx,status);
 558}
 559
 560static inline
 561void ahc_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
 562{
 563        cmd->result &= ~0xFFFF;
 564        cmd->result |= status;
 565}
 566
 567static inline
 568void ahc_set_scsi_status(struct scb *scb, uint32_t status)
 569{
 570        ahc_cmd_set_scsi_status(scb->io_ctx, status);
 571}
 572
 573static inline
 574uint32_t ahc_cmd_get_transaction_status(struct scsi_cmnd *cmd)
 575{
 576        return ((cmd->result >> 16) & CAM_STATUS_MASK);
 577}
 578
 579static inline
 580uint32_t ahc_get_transaction_status(struct scb *scb)
 581{
 582        return (ahc_cmd_get_transaction_status(scb->io_ctx));
 583}
 584
 585static inline
 586uint32_t ahc_cmd_get_scsi_status(struct scsi_cmnd *cmd)
 587{
 588        return (cmd->result & 0xFFFF);
 589}
 590
 591static inline
 592uint32_t ahc_get_scsi_status(struct scb *scb)
 593{
 594        return (ahc_cmd_get_scsi_status(scb->io_ctx));
 595}
 596
 597static inline
 598void ahc_set_transaction_tag(struct scb *scb, int enabled, u_int type)
 599{
 600        /*
 601         * Nothing to do for linux as the incoming transaction
 602         * has no concept of tag/non tagged, etc.
 603         */
 604}
 605
 606static inline
 607u_long ahc_get_transfer_length(struct scb *scb)
 608{
 609        return (scb->platform_data->xfer_len);
 610}
 611
 612static inline
 613int ahc_get_transfer_dir(struct scb *scb)
 614{
 615        return (scb->io_ctx->sc_data_direction);
 616}
 617
 618static inline
 619void ahc_set_residual(struct scb *scb, u_long resid)
 620{
 621        scsi_set_resid(scb->io_ctx, resid);
 622}
 623
 624static inline
 625void ahc_set_sense_residual(struct scb *scb, u_long resid)
 626{
 627        scb->platform_data->sense_resid = resid;
 628}
 629
 630static inline
 631u_long ahc_get_residual(struct scb *scb)
 632{
 633        return scsi_get_resid(scb->io_ctx);
 634}
 635
 636static inline
 637u_long ahc_get_sense_residual(struct scb *scb)
 638{
 639        return (scb->platform_data->sense_resid);
 640}
 641
 642static inline
 643int ahc_perform_autosense(struct scb *scb)
 644{
 645        /*
 646         * We always perform autosense in Linux.
 647         * On other platforms this is set on a
 648         * per-transaction basis.
 649         */
 650        return (1);
 651}
 652
 653static inline uint32_t
 654ahc_get_sense_bufsize(struct ahc_softc *ahc, struct scb *scb)
 655{
 656        return (sizeof(struct scsi_sense_data));
 657}
 658
 659static inline void
 660ahc_notify_xfer_settings_change(struct ahc_softc *ahc,
 661                                struct ahc_devinfo *devinfo)
 662{
 663        /* Nothing to do here for linux */
 664}
 665
 666static inline void
 667ahc_platform_scb_free(struct ahc_softc *ahc, struct scb *scb)
 668{
 669}
 670
 671int     ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg);
 672void    ahc_platform_free(struct ahc_softc *ahc);
 673void    ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb);
 674
 675static inline void
 676ahc_freeze_scb(struct scb *scb)
 677{
 678        if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
 679                scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
 680                scb->platform_data->dev->qfrozen++;
 681        }
 682}
 683
 684void    ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
 685                              struct ahc_devinfo *devinfo, ahc_queue_alg);
 686int     ahc_platform_abort_scbs(struct ahc_softc *ahc, int target,
 687                                char channel, int lun, u_int tag,
 688                                role_t role, uint32_t status);
 689irqreturn_t
 690        ahc_linux_isr(int irq, void *dev_id);
 691void    ahc_platform_flushwork(struct ahc_softc *ahc);
 692void    ahc_done(struct ahc_softc*, struct scb*);
 693void    ahc_send_async(struct ahc_softc *, char channel,
 694                       u_int target, u_int lun, ac_code);
 695void    ahc_print_path(struct ahc_softc *, struct scb *);
 696void    ahc_platform_dump_card_state(struct ahc_softc *ahc);
 697
 698#ifdef CONFIG_PCI
 699#define AHC_PCI_CONFIG 1
 700#else
 701#define AHC_PCI_CONFIG 0
 702#endif
 703#define bootverbose aic7xxx_verbose
 704extern u_int aic7xxx_verbose;
 705#endif /* _AIC7XXX_LINUX_H_ */
 706