drivers/scsi/aic7xxx/aic7xxx_osm.h

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