LXR linux/drivers/scsi/aic7xxx/aic79xx

   1/*
   2 * Adaptec AIC79xx device driver for Linux.
   3 *
   4 * Copyright (c) 2000-2001 Adaptec Inc.
   5 * All rights reserved.
   6 *
   7 * Redistribution and use in source and binary forms, with or without
   8 * modification, are permitted provided that the following conditions
   9 * are met:
  10 * 1. Redistributions of source code must retain the above copyright
  11 *    notice, this list of conditions, and the following disclaimer,
  12 *    without modification.
  13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  14 *    substantially similar to the "NO WARRANTY" disclaimer below
  15 *    ("Disclaimer") and any redistribution must be conditioned upon
  16 *    including a substantially similar Disclaimer requirement for further
  17 *    binary redistribution.
  18 * 3. Neither the names of the above-listed copyright holders nor the names
  19 *    of any contributors may be used to endorse or promote products derived
  20 *    from this software without specific prior written permission.
  21 *
  22 * Alternatively, this software may be distributed under the terms of the
  23 * GNU General Public License ("GPL") version 2 as published by the Free
  24 * Software Foundation.
  25 *
  26 * NO WARRANTY
  27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  35 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  36 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37 * POSSIBILITY OF SUCH DAMAGES.
  38 *
  39 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.h#166 $
  40 *
  41 */
  42#ifndef _AIC79XX_LINUX_H_
  43#define _AIC79XX_LINUX_H_
  44
  45#include <linux/types.h>
  46#include <linux/blkdev.h>
  47#include <linux/delay.h>
  48#include <linux/ioport.h>
  49#include <linux/pci.h>
  50#include <linux/interrupt.h>
  51#include <linux/module.h>
  52#include <linux/slab.h>
  53#include <asm/byteorder.h>
  54#include <asm/io.h>
  55
  56#include <scsi/scsi.h>
  57#include <scsi/scsi_cmnd.h>
  58#include <scsi/scsi_eh.h>
  59#include <scsi/scsi_device.h>
  60#include <scsi/scsi_host.h>
  61#include <scsi/scsi_tcq.h>
  62#include <scsi/scsi_transport.h>
  63#include <scsi/scsi_transport_spi.h>
  64
  65/* Core SCSI definitions */
  66#define AIC_LIB_PREFIX ahd
  67
  68#include "cam.h"
  69#include "queue.h"
  70#include "scsi_message.h"
  71#include "scsi_iu.h"
  72#include "aiclib.h"
  73
  74/*********************************** Debugging ********************************/
  75#ifdef CONFIG_AIC79XX_DEBUG_ENABLE
  76#ifdef CONFIG_AIC79XX_DEBUG_MASK
  77#define AHD_DEBUG 1
  78#define AHD_DEBUG_OPTS CONFIG_AIC79XX_DEBUG_MASK
  79#else
  80/*
  81 * Compile in debugging code, but do not enable any printfs.
  82 */
  83#define AHD_DEBUG 1
  84#define AHD_DEBUG_OPTS 0
  85#endif
  86/* No debugging code. */
  87#endif
  88
  89/********************************** Misc Macros *******************************/
  90#define powerof2(x)     ((((x)-1)&(x))==0)
  91
  92/************************* Forward Declarations *******************************/
  93struct ahd_softc;
  94typedef struct pci_dev *ahd_dev_softc_t;
  95typedef struct scsi_cmnd      *ahd_io_ctx_t;
  96
  97/******************************* Byte Order ***********************************/
  98#define ahd_htobe16(x)  cpu_to_be16(x)
  99#define ahd_htobe32(x)  cpu_to_be32(x)
 100#define ahd_htobe64(x)  cpu_to_be64(x)
 101#define ahd_htole16(x)  cpu_to_le16(x)
 102#define ahd_htole32(x)  cpu_to_le32(x)
 103#define ahd_htole64(x)  cpu_to_le64(x)
 104
 105#define ahd_be16toh(x)  be16_to_cpu(x)
 106#define ahd_be32toh(x)  be32_to_cpu(x)
 107#define ahd_be64toh(x)  be64_to_cpu(x)
 108#define ahd_le16toh(x)  le16_to_cpu(x)
 109#define ahd_le32toh(x)  le32_to_cpu(x)
 110#define ahd_le64toh(x)  le64_to_cpu(x)
 111
 112/************************* Configuration Data *********************************/
 113extern uint32_t aic79xx_allow_memio;
 114extern struct scsi_host_template aic79xx_driver_template;
 115
 116/***************************** Bus Space/DMA **********************************/
 117
 118typedef uint32_t bus_size_t;
 119
 120typedef enum {
 121        BUS_SPACE_MEMIO,
 122        BUS_SPACE_PIO
 123} bus_space_tag_t;
 124
 125typedef union {
 126        u_long            ioport;
 127        volatile uint8_t __iomem *maddr;
 128} bus_space_handle_t;
 129
 130typedef struct bus_dma_segment
 131{
 132        dma_addr_t      ds_addr;
 133        bus_size_t      ds_len;
 134} bus_dma_segment_t;
 135
 136struct ahd_linux_dma_tag
 137{
 138        bus_size_t      alignment;
 139        bus_size_t      boundary;
 140        bus_size_t      maxsize;
 141};
 142typedef struct ahd_linux_dma_tag* bus_dma_tag_t;
 143
 144typedef dma_addr_t bus_dmamap_t;
 145
 146typedef int bus_dma_filter_t(void*, dma_addr_t);
 147typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
 148
 149#define BUS_DMA_WAITOK          0x0
 150#define BUS_DMA_NOWAIT          0x1
 151#define BUS_DMA_ALLOCNOW        0x2
 152#define BUS_DMA_LOAD_SEGS       0x4     /*
 153                                         * Argument is an S/G list not
 154                                         * a single buffer.
 155                                         */
 156
 157#define BUS_SPACE_MAXADDR       0xFFFFFFFF
 158#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
 159#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
 160
 161int     ahd_dma_tag_create(struct ahd_softc *, bus_dma_tag_t /*parent*/,
 162                           bus_size_t /*alignment*/, bus_size_t /*boundary*/,
 163                           dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
 164                           bus_dma_filter_t*/*filter*/, void */*filterarg*/,
 165                           bus_size_t /*maxsize*/, int /*nsegments*/,
 166                           bus_size_t /*maxsegsz*/, int /*flags*/,
 167                           bus_dma_tag_t */*dma_tagp*/);
 168
 169void    ahd_dma_tag_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/);
 170
 171int     ahd_dmamem_alloc(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
 172                         void** /*vaddr*/, int /*flags*/,
 173                         bus_dmamap_t* /*mapp*/);
 174
 175void    ahd_dmamem_free(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
 176                        void* /*vaddr*/, bus_dmamap_t /*map*/);
 177
 178void    ahd_dmamap_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/,
 179                           bus_dmamap_t /*map*/);
 180
 181int     ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t /*dmat*/,
 182                        bus_dmamap_t /*map*/, void * /*buf*/,
 183                        bus_size_t /*buflen*/, bus_dmamap_callback_t *,
 184                        void */*callback_arg*/, int /*flags*/);
 185
 186int     ahd_dmamap_unload(struct ahd_softc *, bus_dma_tag_t, bus_dmamap_t);
 187
 188/*
 189 * Operations performed by ahd_dmamap_sync().
 190 */
 191#define BUS_DMASYNC_PREREAD     0x01    /* pre-read synchronization */
 192#define BUS_DMASYNC_POSTREAD    0x02    /* post-read synchronization */
 193#define BUS_DMASYNC_PREWRITE    0x04    /* pre-write synchronization */
 194#define BUS_DMASYNC_POSTWRITE   0x08    /* post-write synchronization */
 195
 196/*
 197 * XXX
 198 * ahd_dmamap_sync is only used on buffers allocated with
 199 * the pci_alloc_consistent() API.  Although I'm not sure how
 200 * this works on architectures with a write buffer, Linux does
 201 * not have an API to sync "coherent" memory.  Perhaps we need
 202 * to do an mb()?
 203 */
 204#define ahd_dmamap_sync(ahd, dma_tag, dmamap, offset, len, op)
 205
 206/************************** Timer DataStructures ******************************/
 207typedef struct timer_list ahd_timer_t;
 208
 209/********************************** Includes **********************************/
 210#ifdef CONFIG_AIC79XX_REG_PRETTY_PRINT
 211#define AIC_DEBUG_REGISTERS 1
 212#else
 213#define AIC_DEBUG_REGISTERS 0
 214#endif
 215#include "aic79xx.h"
 216
 217/***************************** Timer Facilities *******************************/
 218#define ahd_timer_init init_timer
 219#define ahd_timer_stop del_timer_sync
 220
 221/***************************** SMP support ************************************/
 222#include <linux/spinlock.h>
 223
 224#define AIC79XX_DRIVER_VERSION "3.0"
 225
 226/*************************** Device Data Structures ***************************/
 227/*
 228 * A per probed device structure used to deal with some error recovery
 229 * scenarios that the Linux mid-layer code just doesn't know how to
 230 * handle.  The structure allocated for a device only becomes persistent
 231 * after a successfully completed inquiry command to the target when
 232 * that inquiry data indicates a lun is present.
 233 */
 234
 235typedef enum {
 236        AHD_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
 237        AHD_DEV_Q_BASIC          = 0x10, /* Allow basic device queuing */
 238        AHD_DEV_Q_TAGGED         = 0x20, /* Allow full SCSI2 command queueing */
 239        AHD_DEV_PERIODIC_OTAG    = 0x40, /* Send OTAG to prevent starvation */
 240} ahd_linux_dev_flags;
 241
 242struct ahd_linux_device {
 243        TAILQ_ENTRY(ahd_linux_device) links;
 244
 245        /*
 246         * The number of transactions currently
 247         * queued to the device.
 248         */
 249        int                     active;
 250
 251        /*
 252         * The currently allowed number of 
 253         * transactions that can be queued to
 254         * the device.  Must be signed for
 255         * conversion from tagged to untagged
 256         * mode where the device may have more
 257         * than one outstanding active transaction.
 258         */
 259        int                     openings;
 260
 261        /*
 262         * A positive count indicates that this
 263         * device's queue is halted.
 264         */
 265        u_int                   qfrozen;
 266        
 267        /*
 268         * Cumulative command counter.
 269         */
 270        u_long                  commands_issued;
 271
 272        /*
 273         * The number of tagged transactions when
 274         * running at our current opening level
 275         * that have been successfully received by
 276         * this device since the last QUEUE FULL.
 277         */
 278        u_int                   tag_success_count;
 279#define AHD_TAG_SUCCESS_INTERVAL 50
 280
 281        ahd_linux_dev_flags     flags;
 282
 283        /*
 284         * Per device timer.
 285         */
 286        struct timer_list       timer;
 287
 288        /*
 289         * The high limit for the tags variable.
 290         */
 291        u_int                   maxtags;
 292
 293        /*
 294         * The computed number of tags outstanding
 295         * at the time of the last QUEUE FULL event.
 296         */
 297        u_int                   tags_on_last_queuefull;
 298
 299        /*
 300         * How many times we have seen a queue full
 301         * with the same number of tags.  This is used
 302         * to stop our adaptive queue depth algorithm
 303         * on devices with a fixed number of tags.
 304         */
 305        u_int                   last_queuefull_same_count;
 306#define AHD_LOCK_TAGS_COUNT 50
 307
 308        /*
 309         * How many transactions have been queued
 310         * without the device going idle.  We use
 311         * this statistic to determine when to issue
 312         * an ordered tag to prevent transaction
 313         * starvation.  This statistic is only updated
 314         * if the AHD_DEV_PERIODIC_OTAG flag is set
 315         * on this device.
 316         */
 317        u_int                   commands_since_idle_or_otag;
 318#define AHD_OTAG_THRESH 500
 319};
 320
 321/********************* Definitions Required by the Core ***********************/
 322/*
 323 * Number of SG segments we require.  So long as the S/G segments for
 324 * a particular transaction are allocated in a physically contiguous
 325 * manner and are allocated below 4GB, the number of S/G segments is
 326 * unrestricted.
 327 */
 328#define AHD_NSEG 128
 329
 330/*
 331 * Per-SCB OSM storage.
 332 */
 333struct scb_platform_data {
 334        struct ahd_linux_device *dev;
 335        dma_addr_t               buf_busaddr;
 336        uint32_t                 xfer_len;
 337        uint32_t                 sense_resid;   /* Auto-Sense residual */
 338};
 339
 340/*
 341 * Define a structure used for each host adapter.  All members are
 342 * aligned on a boundary >= the size of the member to honor the
 343 * alignment restrictions of the various platforms supported by
 344 * this driver.
 345 */
 346struct ahd_platform_data {
 347        /*
 348         * Fields accessed from interrupt context.
 349         */
 350        struct scsi_target *starget[AHD_NUM_TARGETS]; 
 351
 352        spinlock_t               spin_lock;
 353        struct completion       *eh_done;
 354        struct Scsi_Host        *host;          /* pointer to scsi host */
 355#define AHD_LINUX_NOIRQ ((uint32_t)~0)
 356        uint32_t                 irq;           /* IRQ for this adapter */
 357        uint32_t                 bios_address;
 358        resource_size_t          mem_busaddr;   /* Mem Base Addr */
 359};
 360
 361void ahd_delay(long);
 362
 363/***************************** Low Level I/O **********************************/
 364uint8_t ahd_inb(struct ahd_softc * ahd, long port);
 365void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
 366void ahd_outw_atomic(struct ahd_softc * ahd,
 367                                     long port, uint16_t val);
 368void ahd_outsb(struct ahd_softc * ahd, long port,
 369                               uint8_t *, int count);
 370void ahd_insb(struct ahd_softc * ahd, long port,
 371                               uint8_t *, int count);
 372
 373/**************************** Initialization **********************************/
 374int             ahd_linux_register_host(struct ahd_softc *,
 375                                        struct scsi_host_template *);
 376
 377/******************************** Locking *************************************/
 378static inline void
 379ahd_lockinit(struct ahd_softc *ahd)
 380{
 381        spin_lock_init(&ahd->platform_data->spin_lock);
 382}
 383
 384static inline void
 385ahd_lock(struct ahd_softc *ahd, unsigned long *flags)
 386{
 387        spin_lock_irqsave(&ahd->platform_data->spin_lock, *flags);
 388}
 389
 390static inline void
 391ahd_unlock(struct ahd_softc *ahd, unsigned long *flags)
 392{
 393        spin_unlock_irqrestore(&ahd->platform_data->spin_lock, *flags);
 394}
 395
 396/******************************* PCI Definitions ******************************/
 397/*
 398 * PCIM_xxx: mask to locate subfield in register
 399 * PCIR_xxx: config register offset
 400 * PCIC_xxx: device class
 401 * PCIS_xxx: device subclass
 402 * PCIP_xxx: device programming interface
 403 * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
 404 * PCID_xxx: device ID
 405 */
 406#define PCIR_DEVVENDOR          0x00
 407#define PCIR_VENDOR             0x00
 408#define PCIR_DEVICE             0x02
 409#define PCIR_COMMAND            0x04
 410#define PCIM_CMD_PORTEN         0x0001
 411#define PCIM_CMD_MEMEN          0x0002
 412#define PCIM_CMD_BUSMASTEREN    0x0004
 413#define PCIM_CMD_MWRICEN        0x0010
 414#define PCIM_CMD_PERRESPEN      0x0040
 415#define PCIM_CMD_SERRESPEN      0x0100
 416#define PCIR_STATUS             0x06
 417#define PCIR_REVID              0x08
 418#define PCIR_PROGIF             0x09
 419#define PCIR_SUBCLASS           0x0a
 420#define PCIR_CLASS              0x0b
 421#define PCIR_CACHELNSZ          0x0c
 422#define PCIR_LATTIMER           0x0d
 423#define PCIR_HEADERTYPE         0x0e
 424#define PCIM_MFDEV              0x80
 425#define PCIR_BIST               0x0f
 426#define PCIR_CAP_PTR            0x34
 427
 428/* config registers for header type 0 devices */
 429#define PCIR_MAPS       0x10
 430#define PCIR_SUBVEND_0  0x2c
 431#define PCIR_SUBDEV_0   0x2e
 432
 433/****************************** PCI-X definitions *****************************/
 434#define PCIXR_COMMAND   0x96
 435#define PCIXR_DEVADDR   0x98
 436#define PCIXM_DEVADDR_FNUM      0x0003  /* Function Number */
 437#define PCIXM_DEVADDR_DNUM      0x00F8  /* Device Number */
 438#define PCIXM_DEVADDR_BNUM      0xFF00  /* Bus Number */
 439#define PCIXR_STATUS    0x9A
 440#define PCIXM_STATUS_64BIT      0x0001  /* Active 64bit connection to device. */
 441#define PCIXM_STATUS_133CAP     0x0002  /* Device is 133MHz capable */
 442#define PCIXM_STATUS_SCDISC     0x0004  /* Split Completion Discarded */
 443#define PCIXM_STATUS_UNEXPSC    0x0008  /* Unexpected Split Completion */
 444#define PCIXM_STATUS_CMPLEXDEV  0x0010  /* Device Complexity (set == bridge) */
 445#define PCIXM_STATUS_MAXMRDBC   0x0060  /* Maximum Burst Read Count */
 446#define PCIXM_STATUS_MAXSPLITS  0x0380  /* Maximum Split Transactions */
 447#define PCIXM_STATUS_MAXCRDS    0x1C00  /* Maximum Cumulative Read Size */
 448#define PCIXM_STATUS_RCVDSCEM   0x2000  /* Received a Split Comp w/Error msg */
 449
 450typedef enum
 451{
 452        AHD_POWER_STATE_D0,
 453        AHD_POWER_STATE_D1,
 454        AHD_POWER_STATE_D2,
 455        AHD_POWER_STATE_D3
 456} ahd_power_state;
 457
 458void ahd_power_state_change(struct ahd_softc *ahd,
 459                            ahd_power_state new_state);
 460
 461/******************************* PCI Routines *********************************/
 462int                      ahd_linux_pci_init(void);
 463void                     ahd_linux_pci_exit(void);
 464int                      ahd_pci_map_registers(struct ahd_softc *ahd);
 465int                      ahd_pci_map_int(struct ahd_softc *ahd);
 466
 467uint32_t                 ahd_pci_read_config(ahd_dev_softc_t pci,
 468                                             int reg, int width);
 469void                     ahd_pci_write_config(ahd_dev_softc_t pci,
 470                                          int reg, uint32_t value,
 471                                          int width);
 472
 473static inline int ahd_get_pci_function(ahd_dev_softc_t);
 474static inline int
 475ahd_get_pci_function(ahd_dev_softc_t pci)
 476{
 477        return (PCI_FUNC(pci->devfn));
 478}
 479
 480static inline int ahd_get_pci_slot(ahd_dev_softc_t);
 481static inline int
 482ahd_get_pci_slot(ahd_dev_softc_t pci)
 483{
 484        return (PCI_SLOT(pci->devfn));
 485}
 486
 487static inline int ahd_get_pci_bus(ahd_dev_softc_t);
 488static inline int
 489ahd_get_pci_bus(ahd_dev_softc_t pci)
 490{
 491        return (pci->bus->number);
 492}
 493
 494static inline void ahd_flush_device_writes(struct ahd_softc *);
 495static inline void
 496ahd_flush_device_writes(struct ahd_softc *ahd)
 497{
 498        /* XXX Is this sufficient for all architectures??? */
 499        ahd_inb(ahd, INTSTAT);
 500}
 501
 502/**************************** Proc FS Support *********************************/
 503int     ahd_proc_write_seeprom(struct Scsi_Host *, char *, int);
 504int     ahd_linux_show_info(struct seq_file *,struct Scsi_Host *);
 505
 506/*********************** Transaction Access Wrappers **************************/
 507static inline void ahd_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
 508static inline void ahd_set_transaction_status(struct scb *, uint32_t);
 509static inline void ahd_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
 510static inline void ahd_set_scsi_status(struct scb *, uint32_t);
 511static inline uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd);
 512static inline uint32_t ahd_get_transaction_status(struct scb *);
 513static inline uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd);
 514static inline uint32_t ahd_get_scsi_status(struct scb *);
 515static inline void ahd_set_transaction_tag(struct scb *, int, u_int);
 516static inline u_long ahd_get_transfer_length(struct scb *);
 517static inline int ahd_get_transfer_dir(struct scb *);
 518static inline void ahd_set_residual(struct scb *, u_long);
 519static inline void ahd_set_sense_residual(struct scb *scb, u_long resid);
 520static inline u_long ahd_get_residual(struct scb *);
 521static inline u_long ahd_get_sense_residual(struct scb *);
 522static inline int ahd_perform_autosense(struct scb *);
 523static inline uint32_t ahd_get_sense_bufsize(struct ahd_softc *,
 524                                               struct scb *);
 525static inline void ahd_notify_xfer_settings_change(struct ahd_softc *,
 526                                                     struct ahd_devinfo *);
 527static inline void ahd_platform_scb_free(struct ahd_softc *ahd,
 528                                           struct scb *scb);
 529static inline void ahd_freeze_scb(struct scb *scb);
 530
 531static inline
 532void ahd_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
 533{
 534        cmd->result &= ~(CAM_STATUS_MASK << 16);
 535        cmd->result |= status << 16;
 536}
 537
 538static inline
 539void ahd_set_transaction_status(struct scb *scb, uint32_t status)
 540{
 541        ahd_cmd_set_transaction_status(scb->io_ctx,status);
 542}
 543
 544static inline
 545void ahd_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
 546{
 547        cmd->result &= ~0xFFFF;
 548        cmd->result |= status;
 549}
 550
 551static inline
 552void ahd_set_scsi_status(struct scb *scb, uint32_t status)
 553{
 554        ahd_cmd_set_scsi_status(scb->io_ctx, status);
 555}
 556
 557static inline
 558uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd)
 559{
 560        return ((cmd->result >> 16) & CAM_STATUS_MASK);
 561}
 562
 563static inline
 564uint32_t ahd_get_transaction_status(struct scb *scb)
 565{
 566        return (ahd_cmd_get_transaction_status(scb->io_ctx));
 567}
 568
 569static inline
 570uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd)
 571{
 572        return (cmd->result & 0xFFFF);
 573}
 574
 575static inline
 576uint32_t ahd_get_scsi_status(struct scb *scb)
 577{
 578        return (ahd_cmd_get_scsi_status(scb->io_ctx));
 579}
 580
 581static inline
 582void ahd_set_transaction_tag(struct scb *scb, int enabled, u_int type)
 583{
 584        /*
 585         * Nothing to do for linux as the incoming transaction
 586         * has no concept of tag/non tagged, etc.
 587         */
 588}
 589
 590static inline
 591u_long ahd_get_transfer_length(struct scb *scb)
 592{
 593        return (scb->platform_data->xfer_len);
 594}
 595
 596static inline
 597int ahd_get_transfer_dir(struct scb *scb)
 598{
 599        return (scb->io_ctx->sc_data_direction);
 600}
 601
 602static inline
 603void ahd_set_residual(struct scb *scb, u_long resid)
 604{
 605        scsi_set_resid(scb->io_ctx, resid);
 606}
 607
 608static inline
 609void ahd_set_sense_residual(struct scb *scb, u_long resid)
 610{
 611        scb->platform_data->sense_resid = resid;
 612}
 613
 614static inline
 615u_long ahd_get_residual(struct scb *scb)
 616{
 617        return scsi_get_resid(scb->io_ctx);
 618}
 619
 620static inline
 621u_long ahd_get_sense_residual(struct scb *scb)
 622{
 623        return (scb->platform_data->sense_resid);
 624}
 625
 626static inline
 627int ahd_perform_autosense(struct scb *scb)
 628{
 629        /*
 630         * We always perform autosense in Linux.
 631         * On other platforms this is set on a
 632         * per-transaction basis.
 633         */
 634        return (1);
 635}
 636
 637static inline uint32_t
 638ahd_get_sense_bufsize(struct ahd_softc *ahd, struct scb *scb)
 639{
 640        return (sizeof(struct scsi_sense_data));
 641}
 642
 643static inline void
 644ahd_notify_xfer_settings_change(struct ahd_softc *ahd,
 645                                struct ahd_devinfo *devinfo)
 646{
 647        /* Nothing to do here for linux */
 648}
 649
 650static inline void
 651ahd_platform_scb_free(struct ahd_softc *ahd, struct scb *scb)
 652{
 653        ahd->flags &= ~AHD_RESOURCE_SHORTAGE;
 654}
 655
 656int     ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg);
 657void    ahd_platform_free(struct ahd_softc *ahd);
 658void    ahd_platform_init(struct ahd_softc *ahd);
 659void    ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb);
 660
 661static inline void
 662ahd_freeze_scb(struct scb *scb)
 663{
 664        if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
 665                scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
 666                scb->platform_data->dev->qfrozen++;
 667        }
 668}
 669
 670void    ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
 671                              struct ahd_devinfo *devinfo, ahd_queue_alg);
 672int     ahd_platform_abort_scbs(struct ahd_softc *ahd, int target,
 673                                char channel, int lun, u_int tag,
 674                                role_t role, uint32_t status);
 675irqreturn_t
 676        ahd_linux_isr(int irq, void *dev_id);
 677void    ahd_done(struct ahd_softc*, struct scb*);
 678void    ahd_send_async(struct ahd_softc *, char channel,
 679                       u_int target, u_int lun, ac_code);
 680void    ahd_print_path(struct ahd_softc *, struct scb *);
 681
 682#ifdef CONFIG_PCI
 683#define AHD_PCI_CONFIG 1
 684#else
 685#define AHD_PCI_CONFIG 0
 686#endif
 687#define bootverbose aic79xx_verbose
 688extern uint32_t aic79xx_verbose;
 689
 690#endif /* _AIC79XX_LINUX_H_ */
 691