drivers/scsi/aic7xxx/aic79xx_osm.h

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