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/* Name space conflict with BSD queue macros */
  69#ifdef LIST_HEAD
  70#undef LIST_HEAD
  71#endif
  72
  73#include "cam.h"
  74#include "queue.h"
  75#include "scsi_message.h"
  76#include "scsi_iu.h"
  77#include "aiclib.h"
  78
  79/*********************************** Debugging ********************************/
  80#ifdef CONFIG_AIC79XX_DEBUG_ENABLE
  81#ifdef CONFIG_AIC79XX_DEBUG_MASK
  82#define AHD_DEBUG 1
  83#define AHD_DEBUG_OPTS CONFIG_AIC79XX_DEBUG_MASK
  84#else
  85/*
  86 * Compile in debugging code, but do not enable any printfs.
  87 */
  88#define AHD_DEBUG 1
  89#define AHD_DEBUG_OPTS 0
  90#endif
  91/* No debugging code. */
  92#endif
  93
  94/********************************** Misc Macros *******************************/
  95#define powerof2(x)     ((((x)-1)&(x))==0)
  96
  97/************************* Forward Declarations *******************************/
  98struct ahd_softc;
  99typedef struct pci_dev *ahd_dev_softc_t;
 100typedef struct scsi_cmnd      *ahd_io_ctx_t;
 101
 102/******************************* Byte Order ***********************************/
 103#define ahd_htobe16(x)  cpu_to_be16(x)
 104#define ahd_htobe32(x)  cpu_to_be32(x)
 105#define ahd_htobe64(x)  cpu_to_be64(x)
 106#define ahd_htole16(x)  cpu_to_le16(x)
 107#define ahd_htole32(x)  cpu_to_le32(x)
 108#define ahd_htole64(x)  cpu_to_le64(x)
 109
 110#define ahd_be16toh(x)  be16_to_cpu(x)
 111#define ahd_be32toh(x)  be32_to_cpu(x)
 112#define ahd_be64toh(x)  be64_to_cpu(x)
 113#define ahd_le16toh(x)  le16_to_cpu(x)
 114#define ahd_le32toh(x)  le32_to_cpu(x)
 115#define ahd_le64toh(x)  le64_to_cpu(x)
 116
 117/************************* Configuration Data *********************************/
 118extern uint32_t aic79xx_allow_memio;
 119extern struct scsi_host_template aic79xx_driver_template;
 120
 121/***************************** Bus Space/DMA **********************************/
 122
 123typedef uint32_t bus_size_t;
 124
 125typedef enum {
 126        BUS_SPACE_MEMIO,
 127        BUS_SPACE_PIO
 128} bus_space_tag_t;
 129
 130typedef union {
 131        u_long            ioport;
 132        volatile uint8_t __iomem *maddr;
 133} bus_space_handle_t;
 134
 135typedef struct bus_dma_segment
 136{
 137        dma_addr_t      ds_addr;
 138        bus_size_t      ds_len;
 139} bus_dma_segment_t;
 140
 141struct ahd_linux_dma_tag
 142{
 143        bus_size_t      alignment;
 144        bus_size_t      boundary;
 145        bus_size_t      maxsize;
 146};
 147typedef struct ahd_linux_dma_tag* bus_dma_tag_t;
 148
 149typedef dma_addr_t bus_dmamap_t;
 150
 151typedef int bus_dma_filter_t(void*, dma_addr_t);
 152typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
 153
 154#define BUS_DMA_WAITOK          0x0
 155#define BUS_DMA_NOWAIT          0x1
 156#define BUS_DMA_ALLOCNOW        0x2
 157#define BUS_DMA_LOAD_SEGS       0x4     /*
 158                                         * Argument is an S/G list not
 159                                         * a single buffer.
 160                                         */
 161
 162#define BUS_SPACE_MAXADDR       0xFFFFFFFF
 163#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
 164#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
 165
 166int     ahd_dma_tag_create(struct ahd_softc *, bus_dma_tag_t /*parent*/,
 167                           bus_size_t /*alignment*/, bus_size_t /*boundary*/,
 168                           dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
 169                           bus_dma_filter_t*/*filter*/, void */*filterarg*/,
 170                           bus_size_t /*maxsize*/, int /*nsegments*/,
 171                           bus_size_t /*maxsegsz*/, int /*flags*/,
 172                           bus_dma_tag_t */*dma_tagp*/);
 173
 174void    ahd_dma_tag_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/);
 175
 176int     ahd_dmamem_alloc(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
 177                         void** /*vaddr*/, int /*flags*/,
 178                         bus_dmamap_t* /*mapp*/);
 179
 180void    ahd_dmamem_free(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
 181                        void* /*vaddr*/, bus_dmamap_t /*map*/);
 182
 183void    ahd_dmamap_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/,
 184                           bus_dmamap_t /*map*/);
 185
 186int     ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t /*dmat*/,
 187                        bus_dmamap_t /*map*/, void * /*buf*/,
 188                        bus_size_t /*buflen*/, bus_dmamap_callback_t *,
 189                        void */*callback_arg*/, int /*flags*/);
 190
 191int     ahd_dmamap_unload(struct ahd_softc *, bus_dma_tag_t, bus_dmamap_t);
 192
 193/*
 194 * Operations performed by ahd_dmamap_sync().
 195 */
 196#define BUS_DMASYNC_PREREAD     0x01    /* pre-read synchronization */
 197#define BUS_DMASYNC_POSTREAD    0x02    /* post-read synchronization */
 198#define BUS_DMASYNC_PREWRITE    0x04    /* pre-write synchronization */
 199#define BUS_DMASYNC_POSTWRITE   0x08    /* post-write synchronization */
 200
 201/*
 202 * XXX
 203 * ahd_dmamap_sync is only used on buffers allocated with
 204 * the pci_alloc_consistent() API.  Although I'm not sure how
 205 * this works on architectures with a write buffer, Linux does
 206 * not have an API to sync "coherent" memory.  Perhaps we need
 207 * to do an mb()?
 208 */
 209#define ahd_dmamap_sync(ahd, dma_tag, dmamap, offset, len, op)
 210
 211/************************** Timer DataStructures ******************************/
 212typedef struct timer_list ahd_timer_t;
 213
 214/********************************** Includes **********************************/
 215#ifdef CONFIG_AIC79XX_REG_PRETTY_PRINT
 216#define AIC_DEBUG_REGISTERS 1
 217#else
 218#define AIC_DEBUG_REGISTERS 0
 219#endif
 220#include "aic79xx.h"
 221
 222/***************************** Timer Facilities *******************************/
 223#define ahd_timer_init init_timer
 224#define ahd_timer_stop del_timer_sync
 225
 226/***************************** SMP support ************************************/
 227#include <linux/spinlock.h>
 228
 229#define AIC79XX_DRIVER_VERSION "3.0"
 230
 231/*************************** Device Data Structures ***************************/
 232/*
 233 * A per probed device structure used to deal with some error recovery
 234 * scenarios that the Linux mid-layer code just doesn't know how to
 235 * handle.  The structure allocated for a device only becomes persistent
 236 * after a successfully completed inquiry command to the target when
 237 * that inquiry data indicates a lun is present.
 238 */
 239
 240typedef enum {
 241        AHD_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
 242        AHD_DEV_Q_BASIC          = 0x10, /* Allow basic device queuing */
 243        AHD_DEV_Q_TAGGED         = 0x20, /* Allow full SCSI2 command queueing */
 244        AHD_DEV_PERIODIC_OTAG    = 0x40, /* Send OTAG to prevent starvation */
 245} ahd_linux_dev_flags;
 246
 247struct ahd_linux_device {
 248        TAILQ_ENTRY(ahd_linux_device) links;
 249
 250        /*
 251         * The number of transactions currently
 252         * queued to the device.
 253         */
 254        int                     active;
 255
 256        /*
 257         * The currently allowed number of 
 258         * transactions that can be queued to
 259         * the device.  Must be signed for
 260         * conversion from tagged to untagged
 261         * mode where the device may have more
 262         * than one outstanding active transaction.
 263         */
 264        int                     openings;
 265
 266        /*
 267         * A positive count indicates that this
 268         * device's queue is halted.
 269         */
 270        u_int                   qfrozen;
 271        
 272        /*
 273         * Cumulative command counter.
 274         */
 275        u_long                  commands_issued;
 276
 277        /*
 278         * The number of tagged transactions when
 279         * running at our current opening level
 280         * that have been successfully received by
 281         * this device since the last QUEUE FULL.
 282         */
 283        u_int                   tag_success_count;
 284#define AHD_TAG_SUCCESS_INTERVAL 50
 285
 286        ahd_linux_dev_flags     flags;
 287
 288        /*
 289         * Per device timer.
 290         */
 291        struct timer_list       timer;
 292
 293        /*
 294         * The high limit for the tags variable.
 295         */
 296        u_int                   maxtags;
 297
 298        /*
 299         * The computed number of tags outstanding
 300         * at the time of the last QUEUE FULL event.
 301         */
 302        u_int                   tags_on_last_queuefull;
 303
 304        /*
 305         * How many times we have seen a queue full
 306         * with the same number of tags.  This is used
 307         * to stop our adaptive queue depth algorithm
 308         * on devices with a fixed number of tags.
 309         */
 310        u_int                   last_queuefull_same_count;
 311#define AHD_LOCK_TAGS_COUNT 50
 312
 313        /*
 314         * How many transactions have been queued
 315         * without the device going idle.  We use
 316         * this statistic to determine when to issue
 317         * an ordered tag to prevent transaction
 318         * starvation.  This statistic is only updated
 319         * if the AHD_DEV_PERIODIC_OTAG flag is set
 320         * on this device.
 321         */
 322        u_int                   commands_since_idle_or_otag;
 323#define AHD_OTAG_THRESH 500
 324};
 325
 326/********************* Definitions Required by the Core ***********************/
 327/*
 328 * Number of SG segments we require.  So long as the S/G segments for
 329 * a particular transaction are allocated in a physically contiguous
 330 * manner and are allocated below 4GB, the number of S/G segments is
 331 * unrestricted.
 332 */
 333#define AHD_NSEG 128
 334
 335/*
 336 * Per-SCB OSM storage.
 337 */
 338struct scb_platform_data {
 339        struct ahd_linux_device *dev;
 340        dma_addr_t               buf_busaddr;
 341        uint32_t                 xfer_len;
 342        uint32_t                 sense_resid;   /* Auto-Sense residual */
 343};
 344
 345/*
 346 * Define a structure used for each host adapter.  All members are
 347 * aligned on a boundary >= the size of the member to honor the
 348 * alignment restrictions of the various platforms supported by
 349 * this driver.
 350 */
 351struct ahd_platform_data {
 352        /*
 353         * Fields accessed from interrupt context.
 354         */
 355        struct scsi_target *starget[AHD_NUM_TARGETS]; 
 356
 357        spinlock_t               spin_lock;
 358        struct completion       *eh_done;
 359        struct Scsi_Host        *host;          /* pointer to scsi host */
 360#define AHD_LINUX_NOIRQ ((uint32_t)~0)
 361        uint32_t                 irq;           /* IRQ for this adapter */
 362        uint32_t                 bios_address;
 363        resource_size_t          mem_busaddr;   /* Mem Base Addr */
 364};
 365
 366void ahd_delay(long);
 367
 368/***************************** Low Level I/O **********************************/
 369uint8_t ahd_inb(struct ahd_softc * ahd, long port);
 370void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
 371void ahd_outw_atomic(struct ahd_softc * ahd,
 372                                     long port, uint16_t val);
 373void ahd_outsb(struct ahd_softc * ahd, long port,
 374                               uint8_t *, int count);
 375void ahd_insb(struct ahd_softc * ahd, long port,
 376                               uint8_t *, int count);
 377
 378/**************************** Initialization **********************************/
 379int             ahd_linux_register_host(struct ahd_softc *,
 380                                        struct scsi_host_template *);
 381
 382/******************************** Locking *************************************/
 383static inline void
 384ahd_lockinit(struct ahd_softc *ahd)
 385{
 386        spin_lock_init(&ahd->platform_data->spin_lock);
 387}
 388
 389static inline void
 390ahd_lock(struct ahd_softc *ahd, unsigned long *flags)
 391{
 392        spin_lock_irqsave(&ahd->platform_data->spin_lock, *flags);
 393}
 394
 395static inline void
 396ahd_unlock(struct ahd_softc *ahd, unsigned long *flags)
 397{
 398        spin_unlock_irqrestore(&ahd->platform_data->spin_lock, *flags);
 399}
 400
 401/******************************* PCI Definitions ******************************/
 402/*
 403 * PCIM_xxx: mask to locate subfield in register
 404 * PCIR_xxx: config register offset
 405 * PCIC_xxx: device class
 406 * PCIS_xxx: device subclass
 407 * PCIP_xxx: device programming interface
 408 * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
 409 * PCID_xxx: device ID
 410 */
 411#define PCIR_DEVVENDOR          0x00
 412#define PCIR_VENDOR             0x00
 413#define PCIR_DEVICE             0x02
 414#define PCIR_COMMAND            0x04
 415#define PCIM_CMD_PORTEN         0x0001
 416#define PCIM_CMD_MEMEN          0x0002
 417#define PCIM_CMD_BUSMASTEREN    0x0004
 418#define PCIM_CMD_MWRICEN        0x0010
 419#define PCIM_CMD_PERRESPEN      0x0040
 420#define PCIM_CMD_SERRESPEN      0x0100
 421#define PCIR_STATUS             0x06
 422#define PCIR_REVID              0x08
 423#define PCIR_PROGIF             0x09
 424#define PCIR_SUBCLASS           0x0a
 425#define PCIR_CLASS              0x0b
 426#define PCIR_CACHELNSZ          0x0c
 427#define PCIR_LATTIMER           0x0d
 428#define PCIR_HEADERTYPE         0x0e
 429#define PCIM_MFDEV              0x80
 430#define PCIR_BIST               0x0f
 431#define PCIR_CAP_PTR            0x34
 432
 433/* config registers for header type 0 devices */
 434#define PCIR_MAPS       0x10
 435#define PCIR_SUBVEND_0  0x2c
 436#define PCIR_SUBDEV_0   0x2e
 437
 438/****************************** PCI-X definitions *****************************/
 439#define PCIXR_COMMAND   0x96
 440#define PCIXR_DEVADDR   0x98
 441#define PCIXM_DEVADDR_FNUM      0x0003  /* Function Number */
 442#define PCIXM_DEVADDR_DNUM      0x00F8  /* Device Number */
 443#define PCIXM_DEVADDR_BNUM      0xFF00  /* Bus Number */
 444#define PCIXR_STATUS    0x9A
 445#define PCIXM_STATUS_64BIT      0x0001  /* Active 64bit connection to device. */
 446#define PCIXM_STATUS_133CAP     0x0002  /* Device is 133MHz capable */
 447#define PCIXM_STATUS_SCDISC     0x0004  /* Split Completion Discarded */
 448#define PCIXM_STATUS_UNEXPSC    0x0008  /* Unexpected Split Completion */
 449#define PCIXM_STATUS_CMPLEXDEV  0x0010  /* Device Complexity (set == bridge) */
 450#define PCIXM_STATUS_MAXMRDBC   0x0060  /* Maximum Burst Read Count */
 451#define PCIXM_STATUS_MAXSPLITS  0x0380  /* Maximum Split Transactions */
 452#define PCIXM_STATUS_MAXCRDS    0x1C00  /* Maximum Cumulative Read Size */
 453#define PCIXM_STATUS_RCVDSCEM   0x2000  /* Received a Split Comp w/Error msg */
 454
 455typedef enum
 456{
 457        AHD_POWER_STATE_D0,
 458        AHD_POWER_STATE_D1,
 459        AHD_POWER_STATE_D2,
 460        AHD_POWER_STATE_D3
 461} ahd_power_state;
 462
 463void ahd_power_state_change(struct ahd_softc *ahd,
 464                            ahd_power_state new_state);
 465
 466/******************************* PCI Routines *********************************/
 467int                      ahd_linux_pci_init(void);
 468void                     ahd_linux_pci_exit(void);
 469int                      ahd_pci_map_registers(struct ahd_softc *ahd);
 470int                      ahd_pci_map_int(struct ahd_softc *ahd);
 471
 472uint32_t                 ahd_pci_read_config(ahd_dev_softc_t pci,
 473                                             int reg, int width);
 474void                     ahd_pci_write_config(ahd_dev_softc_t pci,
 475                                          int reg, uint32_t value,
 476                                          int width);
 477
 478static inline int ahd_get_pci_function(ahd_dev_softc_t);
 479static inline int
 480ahd_get_pci_function(ahd_dev_softc_t pci)
 481{
 482        return (PCI_FUNC(pci->devfn));
 483}
 484
 485static inline int ahd_get_pci_slot(ahd_dev_softc_t);
 486static inline int
 487ahd_get_pci_slot(ahd_dev_softc_t pci)
 488{
 489        return (PCI_SLOT(pci->devfn));
 490}
 491
 492static inline int ahd_get_pci_bus(ahd_dev_softc_t);
 493static inline int
 494ahd_get_pci_bus(ahd_dev_softc_t pci)
 495{
 496        return (pci->bus->number);
 497}
 498
 499static inline void ahd_flush_device_writes(struct ahd_softc *);
 500static inline void
 501ahd_flush_device_writes(struct ahd_softc *ahd)
 502{
 503        /* XXX Is this sufficient for all architectures??? */
 504        ahd_inb(ahd, INTSTAT);
 505}
 506
 507/**************************** Proc FS Support *********************************/
 508int     ahd_proc_write_seeprom(struct Scsi_Host *, char *, int);
 509int     ahd_linux_show_info(struct seq_file *,struct Scsi_Host *);
 510
 511/*********************** Transaction Access Wrappers **************************/
 512static inline void ahd_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
 513static inline void ahd_set_transaction_status(struct scb *, uint32_t);
 514static inline void ahd_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
 515static inline void ahd_set_scsi_status(struct scb *, uint32_t);
 516static inline uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd);
 517static inline uint32_t ahd_get_transaction_status(struct scb *);
 518static inline uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd);
 519static inline uint32_t ahd_get_scsi_status(struct scb *);
 520static inline void ahd_set_transaction_tag(struct scb *, int, u_int);
 521static inline u_long ahd_get_transfer_length(struct scb *);
 522static inline int ahd_get_transfer_dir(struct scb *);
 523static inline void ahd_set_residual(struct scb *, u_long);
 524static inline void ahd_set_sense_residual(struct scb *scb, u_long resid);
 525static inline u_long ahd_get_residual(struct scb *);
 526static inline u_long ahd_get_sense_residual(struct scb *);
 527static inline int ahd_perform_autosense(struct scb *);
 528static inline uint32_t ahd_get_sense_bufsize(struct ahd_softc *,
 529                                               struct scb *);
 530static inline void ahd_notify_xfer_settings_change(struct ahd_softc *,
 531                                                     struct ahd_devinfo *);
 532static inline void ahd_platform_scb_free(struct ahd_softc *ahd,
 533                                           struct scb *scb);
 534static inline void ahd_freeze_scb(struct scb *scb);
 535
 536static inline
 537void ahd_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
 538{
 539        cmd->result &= ~(CAM_STATUS_MASK << 16);
 540        cmd->result |= status << 16;
 541}
 542
 543static inline
 544void ahd_set_transaction_status(struct scb *scb, uint32_t status)
 545{
 546        ahd_cmd_set_transaction_status(scb->io_ctx,status);
 547}
 548
 549static inline
 550void ahd_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
 551{
 552        cmd->result &= ~0xFFFF;
 553        cmd->result |= status;
 554}
 555
 556static inline
 557void ahd_set_scsi_status(struct scb *scb, uint32_t status)
 558{
 559        ahd_cmd_set_scsi_status(scb->io_ctx, status);
 560}
 561
 562static inline
 563uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd)
 564{
 565        return ((cmd->result >> 16) & CAM_STATUS_MASK);
 566}
 567
 568static inline
 569uint32_t ahd_get_transaction_status(struct scb *scb)
 570{
 571        return (ahd_cmd_get_transaction_status(scb->io_ctx));
 572}
 573
 574static inline
 575uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd)
 576{
 577        return (cmd->result & 0xFFFF);
 578}
 579
 580static inline
 581uint32_t ahd_get_scsi_status(struct scb *scb)
 582{
 583        return (ahd_cmd_get_scsi_status(scb->io_ctx));
 584}
 585
 586static inline
 587void ahd_set_transaction_tag(struct scb *scb, int enabled, u_int type)
 588{
 589        /*
 590         * Nothing to do for linux as the incoming transaction
 591         * has no concept of tag/non tagged, etc.
 592         */
 593}
 594
 595static inline
 596u_long ahd_get_transfer_length(struct scb *scb)
 597{
 598        return (scb->platform_data->xfer_len);
 599}
 600
 601static inline
 602int ahd_get_transfer_dir(struct scb *scb)
 603{
 604        return (scb->io_ctx->sc_data_direction);
 605}
 606
 607static inline
 608void ahd_set_residual(struct scb *scb, u_long resid)
 609{
 610        scsi_set_resid(scb->io_ctx, resid);
 611}
 612
 613static inline
 614void ahd_set_sense_residual(struct scb *scb, u_long resid)
 615{
 616        scb->platform_data->sense_resid = resid;
 617}
 618
 619static inline
 620u_long ahd_get_residual(struct scb *scb)
 621{
 622        return scsi_get_resid(scb->io_ctx);
 623}
 624
 625static inline
 626u_long ahd_get_sense_residual(struct scb *scb)
 627{
 628        return (scb->platform_data->sense_resid);
 629}
 630
 631static inline
 632int ahd_perform_autosense(struct scb *scb)
 633{
 634        /*
 635         * We always perform autosense in Linux.
 636         * On other platforms this is set on a
 637         * per-transaction basis.
 638         */
 639        return (1);
 640}
 641
 642static inline uint32_t
 643ahd_get_sense_bufsize(struct ahd_softc *ahd, struct scb *scb)
 644{
 645        return (sizeof(struct scsi_sense_data));
 646}
 647
 648static inline void
 649ahd_notify_xfer_settings_change(struct ahd_softc *ahd,
 650                                struct ahd_devinfo *devinfo)
 651{
 652        /* Nothing to do here for linux */
 653}
 654
 655static inline void
 656ahd_platform_scb_free(struct ahd_softc *ahd, struct scb *scb)
 657{
 658        ahd->flags &= ~AHD_RESOURCE_SHORTAGE;
 659}
 660
 661int     ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg);
 662void    ahd_platform_free(struct ahd_softc *ahd);
 663void    ahd_platform_init(struct ahd_softc *ahd);
 664void    ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb);
 665
 666static inline void
 667ahd_freeze_scb(struct scb *scb)
 668{
 669        if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
 670                scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
 671                scb->platform_data->dev->qfrozen++;
 672        }
 673}
 674
 675void    ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
 676                              struct ahd_devinfo *devinfo, ahd_queue_alg);
 677int     ahd_platform_abort_scbs(struct ahd_softc *ahd, int target,
 678                                char channel, int lun, u_int tag,
 679                                role_t role, uint32_t status);
 680irqreturn_t
 681        ahd_linux_isr(int irq, void *dev_id);
 682void    ahd_done(struct ahd_softc*, struct scb*);
 683void    ahd_send_async(struct ahd_softc *, char channel,
 684                       u_int target, u_int lun, ac_code);
 685void    ahd_print_path(struct ahd_softc *, struct scb *);
 686
 687#ifdef CONFIG_PCI
 688#define AHD_PCI_CONFIG 1
 689#else
 690#define AHD_PCI_CONFIG 0
 691#endif
 692#define bootverbose aic79xx_verbose
 693extern uint32_t aic79xx_verbose;
 694
 695#endif /* _AIC79XX_LINUX_H_ */
 696