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/config.h>
  63 #include <linux/types.h>
  64 #include <linux/blkdev.h>
  65 #include <linux/delay.h>
  66 #include <linux/ioport.h>
  67 #include <linux/pci.h>
  68 #include <linux/smp_lock.h>
  69 #include <linux/version.h>
  70 #include <linux/interrupt.h>
  71 #include <linux/module.h>
  72 #include <linux/slab.h>
  73 #include <asm/byteorder.h>
  74 #include <asm/io.h>
  75
  76 #include <scsi/scsi.h>
  77 #include <scsi/scsi_cmnd.h>
  78 #include <scsi/scsi_eh.h>
  79 #include <scsi/scsi_device.h>
  80 #include <scsi/scsi_host.h>
  81 #include <scsi/scsi_tcq.h>
  82 #include <scsi/scsi_transport.h>
  83 #include <scsi/scsi_transport_spi.h>
  84
  85 /* Core SCSI definitions */
  86 #define AIC_LIB_PREFIX ahc
  87
  88 /* Name space conflict with BSD queue macros */
  89 #ifdef LIST_HEAD
  90 #undef LIST_HEAD
  91 #endif
  92
  93 #include "cam.h"
  94 #include "queue.h"
  95 #include "scsi_message.h"
  96 #include "aiclib.h"
  97
  98 /*********************************** Debugging ********************************/
  99 #ifdef CONFIG_AIC7XXX_DEBUG_ENABLE
 100 #ifdef CONFIG_AIC7XXX_DEBUG_MASK
 101 #define AHC_DEBUG 1
 102 #define AHC_DEBUG_OPTS CONFIG_AIC7XXX_DEBUG_MASK
 103 #else
 104 /*
 105  * Compile in debugging code, but do not enable any printfs.
 106  */
 107 #define AHC_DEBUG 1
 108 #endif
 109 /* No debugging code. */
 110 #endif
 111
 112 /************************* Forward Declarations *******************************/
 113 struct ahc_softc;
 114 typedef struct pci_dev *ahc_dev_softc_t;
 115 typedef struct scsi_cmnd      *ahc_io_ctx_t;
 116
 117 /******************************* Byte Order ***********************************/
 118 #define ahc_htobe16(x)  cpu_to_be16(x)
 119 #define ahc_htobe32(x)  cpu_to_be32(x)
 120 #define ahc_htobe64(x)  cpu_to_be64(x)
 121 #define ahc_htole16(x)  cpu_to_le16(x)
 122 #define ahc_htole32(x)  cpu_to_le32(x)
 123 #define ahc_htole64(x)  cpu_to_le64(x)
 124
 125 #define ahc_be16toh(x)  be16_to_cpu(x)
 126 #define ahc_be32toh(x)  be32_to_cpu(x)
 127 #define ahc_be64toh(x)  be64_to_cpu(x)
 128 #define ahc_le16toh(x)  le16_to_cpu(x)
 129 #define ahc_le32toh(x)  le32_to_cpu(x)
 130 #define ahc_le64toh(x)  le64_to_cpu(x)
 131
 132 /************************* Configuration Data *********************************/
 133 extern u_int aic7xxx_no_probe;
 134 extern u_int aic7xxx_allow_memio;
 135 extern struct scsi_host_template aic7xxx_driver_template;
 136
 137 /***************************** Bus Space/DMA **********************************/
 138
 139 typedef uint32_t bus_size_t;
 140
 141 typedef enum {
 142         BUS_SPACE_MEMIO,
 143         BUS_SPACE_PIO
 144 } bus_space_tag_t;
 145
 146 typedef union {
 147         u_long            ioport;
 148         volatile uint8_t __iomem *maddr;
 149 } bus_space_handle_t;
 150
 151 typedef struct bus_dma_segment
 152 {
 153         dma_addr_t      ds_addr;
 154         bus_size_t      ds_len;
 155 } bus_dma_segment_t;
 156
 157 struct ahc_linux_dma_tag
 158 {
 159         bus_size_t      alignment;
 160         bus_size_t      boundary;
 161         bus_size_t      maxsize;
 162 };
 163 typedef struct ahc_linux_dma_tag* bus_dma_tag_t;
 164
 165 typedef dma_addr_t bus_dmamap_t;
 166
 167 typedef int bus_dma_filter_t(void*, dma_addr_t);
 168 typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
 169
 170 #define BUS_DMA_WAITOK          0x0
 171 #define BUS_DMA_NOWAIT          0x1
 172 #define BUS_DMA_ALLOCNOW        0x2
 173 #define BUS_DMA_LOAD_SEGS       0x4     /*
 174                                          * Argument is an S/G list not
 175                                          * a single buffer.
 176                                          */
 177
 178 #define BUS_SPACE_MAXADDR       0xFFFFFFFF
 179 #define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
 180 #define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
 181
 182 int     ahc_dma_tag_create(struct ahc_softc *, bus_dma_tag_t /*parent*/,
 183                            bus_size_t /*alignment*/, bus_size_t /*boundary*/,
 184                            dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
 185                            bus_dma_filter_t*/*filter*/, void */*filterarg*/,
 186                            bus_size_t /*maxsize*/, int /*nsegments*/,
 187                            bus_size_t /*maxsegsz*/, int /*flags*/,
 188                            bus_dma_tag_t */*dma_tagp*/);
 189
 190 void    ahc_dma_tag_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/);
 191
 192 int     ahc_dmamem_alloc(struct ahc_softc *, bus_dma_tag_t /*dmat*/,
 193                          void** /*vaddr*/, int /*flags*/,
 194                          bus_dmamap_t* /*mapp*/);
 195
 196 void    ahc_dmamem_free(struct ahc_softc *, bus_dma_tag_t /*dmat*/,
 197                         void* /*vaddr*/, bus_dmamap_t /*map*/);
 198
 199 void    ahc_dmamap_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/,
 200                            bus_dmamap_t /*map*/);
 201
 202 int     ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t /*dmat*/,
 203                         bus_dmamap_t /*map*/, void * /*buf*/,
 204                         bus_size_t /*buflen*/, bus_dmamap_callback_t *,
 205                         void */*callback_arg*/, int /*flags*/);
 206
 207 int     ahc_dmamap_unload(struct ahc_softc *, bus_dma_tag_t, bus_dmamap_t);
 208
 209 /*
 210  * Operations performed by ahc_dmamap_sync().
 211  */
 212 #define BUS_DMASYNC_PREREAD     0x01    /* pre-read synchronization */
 213 #define BUS_DMASYNC_POSTREAD    0x02    /* post-read synchronization */
 214 #define BUS_DMASYNC_PREWRITE    0x04    /* pre-write synchronization */
 215 #define BUS_DMASYNC_POSTWRITE   0x08    /* post-write synchronization */
 216
 217 /*
 218  * XXX
 219  * ahc_dmamap_sync is only used on buffers allocated with
 220  * the pci_alloc_consistent() API.  Although I'm not sure how
 221  * this works on architectures with a write buffer, Linux does
 222  * not have an API to sync "coherent" memory.  Perhaps we need
 223  * to do an mb()?
 224  */
 225 #define ahc_dmamap_sync(ahc, dma_tag, dmamap, offset, len, op)
 226
 227 /************************** Timer DataStructures ******************************/
 228 typedef struct timer_list ahc_timer_t;
 229
 230 /********************************** Includes **********************************/
 231 #ifdef CONFIG_AIC7XXX_REG_PRETTY_PRINT
 232 #define AIC_DEBUG_REGISTERS 1
 233 #else
 234 #define AIC_DEBUG_REGISTERS 0
 235 #endif
 236 #include "aic7xxx.h"
 237
 238 /***************************** Timer Facilities *******************************/
 239 #define ahc_timer_init init_timer
 240 #define ahc_timer_stop del_timer_sync
 241 typedef void ahc_linux_callback_t (u_long);
 242 static __inline void ahc_timer_reset(ahc_timer_t *timer, int usec,
 243                                      ahc_callback_t *func, void *arg);
 244 static __inline void ahc_scb_timer_reset(struct scb *scb, u_int usec);
 245
 246 static __inline void
 247 ahc_timer_reset(ahc_timer_t *timer, int usec, ahc_callback_t *func, void *arg)
 248 {
 249         struct ahc_softc *ahc;
 250
 251         ahc = (struct ahc_softc *)arg;
 252         del_timer(timer);
 253         timer->data = (u_long)arg;
 254         timer->expires = jiffies + (usec * HZ)/1000000;
 255         timer->function = (ahc_linux_callback_t*)func;
 256         add_timer(timer);
 257 }
 258
 259 static __inline void
 260 ahc_scb_timer_reset(struct scb *scb, u_int usec)
 261 {
 262         mod_timer(&scb->io_ctx->eh_timeout, jiffies + (usec * HZ)/1000000);
 263 }
 264
 265 /***************************** SMP support ************************************/
 266 #include <linux/spinlock.h>
 267
 268 #define AIC7XXX_DRIVER_VERSION "7.0"
 269
 270 /*************************** Device Data Structures ***************************/
 271 /*
 272  * A per probed device structure used to deal with some error recovery
 273  * scenarios that the Linux mid-layer code just doesn't know how to
 274  * handle.  The structure allocated for a device only becomes persistent
 275  * after a successfully completed inquiry command to the target when
 276  * that inquiry data indicates a lun is present.
 277  */
 278 typedef enum {
 279         AHC_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
 280         AHC_DEV_Q_BASIC          = 0x10, /* Allow basic device queuing */
 281         AHC_DEV_Q_TAGGED         = 0x20, /* Allow full SCSI2 command queueing */
 282         AHC_DEV_PERIODIC_OTAG    = 0x40, /* Send OTAG to prevent starvation */
 283 } ahc_linux_dev_flags;
 284
 285 struct ahc_linux_target;
 286 struct ahc_linux_device {
 287         /*
 288          * The number of transactions currently
 289          * queued to the device.
 290          */
 291         int                     active;
 292
 293         /*
 294          * The currently allowed number of
 295          * transactions that can be queued to
 296          * the device.  Must be signed for
 297          * conversion from tagged to untagged
 298          * mode where the device may have more
 299          * than one outstanding active transaction.
 300          */
 301         int                     openings;
 302
 303         /*
 304          * A positive count indicates that this
 305          * device's queue is halted.
 306          */
 307         u_int                   qfrozen;
 308
 309         /*
 310          * Cumulative command counter.
 311          */
 312         u_long                  commands_issued;
 313
 314         /*
 315          * The number of tagged transactions when
 316          * running at our current opening level
 317          * that have been successfully received by
 318          * this device since the last QUEUE FULL.
 319          */
 320         u_int                   tag_success_count;
 321 #define AHC_TAG_SUCCESS_INTERVAL 50
 322
 323         ahc_linux_dev_flags     flags;
 324
 325         /*
 326          * The high limit for the tags variable.
 327          */
 328         u_int                   maxtags;
 329
 330         /*
 331          * The computed number of tags outstanding
 332          * at the time of the last QUEUE FULL event.
 333          */
 334         u_int                   tags_on_last_queuefull;
 335
 336         /*
 337          * How many times we have seen a queue full
 338          * with the same number of tags.  This is used
 339          * to stop our adaptive queue depth algorithm
 340          * on devices with a fixed number of tags.
 341          */
 342         u_int                   last_queuefull_same_count;
 343 #define AHC_LOCK_TAGS_COUNT 50
 344
 345         /*
 346          * How many transactions have been queued
 347          * without the device going idle.  We use
 348          * this statistic to determine when to issue
 349          * an ordered tag to prevent transaction
 350          * starvation.  This statistic is only updated
 351          * if the AHC_DEV_PERIODIC_OTAG flag is set
 352          * on this device.
 353          */
 354         u_int                   commands_since_idle_or_otag;
 355 #define AHC_OTAG_THRESH 500
 356 };
 357
 358 struct ahc_linux_target {
 359         struct scsi_device       *sdev[AHC_NUM_LUNS];
 360         struct ahc_transinfo      last_tinfo;
 361         struct ahc_softc         *ahc;
 362 };
 363
 364 /********************* Definitions Required by the Core ***********************/
 365 /*
 366  * Number of SG segments we require.  So long as the S/G segments for
 367  * a particular transaction are allocated in a physically contiguous
 368  * manner and are allocated below 4GB, the number of S/G segments is
 369  * unrestricted.
 370  */
 371 #define AHC_NSEG 128
 372
 373 /*
 374  * Per-SCB OSM storage.
 375  */
 376 struct scb_platform_data {
 377         struct ahc_linux_device *dev;
 378         dma_addr_t               buf_busaddr;
 379         uint32_t                 xfer_len;
 380         uint32_t                 sense_resid;   /* Auto-Sense residual */
 381 };
 382
 383 /*
 384  * Define a structure used for each host adapter.  All members are
 385  * aligned on a boundary >= the size of the member to honor the
 386  * alignment restrictions of the various platforms supported by
 387  * this driver.
 388  */
 389 struct ahc_platform_data {
 390         /*
 391          * Fields accessed from interrupt context.
 392          */
 393         struct scsi_target *starget[AHC_NUM_TARGETS];
 394
 395         spinlock_t               spin_lock;
 396         u_int                    qfrozen;
 397         struct timer_list        reset_timer;
 398         struct semaphore         eh_sem;
 399         struct Scsi_Host        *host;          /* pointer to scsi host */
 400 #define AHC_LINUX_NOIRQ ((uint32_t)~0)
 401         uint32_t                 irq;           /* IRQ for this adapter */
 402         uint32_t                 bios_address;
 403         uint32_t                 mem_busaddr;   /* Mem Base Addr */
 404
 405 #define AHC_UP_EH_SEMAPHORE      0x1
 406         uint32_t                 flags;
 407 };
 408
 409 /************************** OS Utility Wrappers *******************************/
 410 #define printf printk
 411 #define M_NOWAIT GFP_ATOMIC
 412 #define M_WAITOK 0
 413 #define malloc(size, type, flags) kmalloc(size, flags)
 414 #define free(ptr, type) kfree(ptr)
 415
 416 static __inline void ahc_delay(long);
 417 static __inline void
 418 ahc_delay(long usec)
 419 {
 420         /*
 421          * udelay on Linux can have problems for
 422          * multi-millisecond waits.  Wait at most
 423          * 1024us per call.
 424          */
 425         while (usec > 0) {
 426                 udelay(usec % 1024);
 427                 usec -= 1024;
 428         }
 429 }
 430
 431
 432 /***************************** Low Level I/O **********************************/
 433 static __inline uint8_t ahc_inb(struct ahc_softc * ahc, long port);
 434 static __inline void ahc_outb(struct ahc_softc * ahc, long port, uint8_t val);
 435 static __inline void ahc_outsb(struct ahc_softc * ahc, long port,
 436                                uint8_t *, int count);
 437 static __inline void ahc_insb(struct ahc_softc * ahc, long port,
 438                                uint8_t *, int count);
 439
 440 static __inline uint8_t
 441 ahc_inb(struct ahc_softc * ahc, long port)
 442 {
 443         uint8_t x;
 444
 445         if (ahc->tag == BUS_SPACE_MEMIO) {
 446                 x = readb(ahc->bsh.maddr + port);
 447         } else {
 448                 x = inb(ahc->bsh.ioport + port);
 449         }
 450         mb();
 451         return (x);
 452 }
 453
 454 static __inline void
 455 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
 456 {
 457         if (ahc->tag == BUS_SPACE_MEMIO) {
 458                 writeb(val, ahc->bsh.maddr + port);
 459         } else {
 460                 outb(val, ahc->bsh.ioport + port);
 461         }
 462         mb();
 463 }
 464
 465 static __inline void
 466 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
 467 {
 468         int i;
 469
 470         /*
 471          * There is probably a more efficient way to do this on Linux
 472          * but we don't use this for anything speed critical and this
 473          * should work.
 474          */
 475         for (i = 0; i < count; i++)
 476                 ahc_outb(ahc, port, *array++);
 477 }
 478
 479 static __inline void
 480 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
 481 {
 482         int i;
 483
 484         /*
 485          * There is probably a more efficient way to do this on Linux
 486          * but we don't use this for anything speed critical and this
 487          * should work.
 488          */
 489         for (i = 0; i < count; i++)
 490                 *array++ = ahc_inb(ahc, port);
 491 }
 492
 493 /**************************** Initialization **********************************/
 494 int             ahc_linux_register_host(struct ahc_softc *,
 495                                         struct scsi_host_template *);
 496
 497 uint64_t        ahc_linux_get_memsize(void);
 498
 499 /*************************** Pretty Printing **********************************/
 500 struct info_str {
 501         char *buffer;
 502         int length;
 503         off_t offset;
 504         int pos;
 505 };
 506
 507 void    ahc_format_transinfo(struct info_str *info,
 508                              struct ahc_transinfo *tinfo);
 509
 510 /******************************** Locking *************************************/
 511 /* Lock protecting internal data structures */
 512
 513 static __inline void
 514 ahc_lockinit(struct ahc_softc *ahc)
 515 {
 516         spin_lock_init(&ahc->platform_data->spin_lock);
 517 }
 518
 519 static __inline void
 520 ahc_lock(struct ahc_softc *ahc, unsigned long *flags)
 521 {
 522         spin_lock_irqsave(&ahc->platform_data->spin_lock, *flags);
 523 }
 524
 525 static __inline void
 526 ahc_unlock(struct ahc_softc *ahc, unsigned long *flags)
 527 {
 528         spin_unlock_irqrestore(&ahc->platform_data->spin_lock, *flags);
 529 }
 530
 531 /******************************* PCI Definitions ******************************/
 532 /*
 533  * PCIM_xxx: mask to locate subfield in register
 534  * PCIR_xxx: config register offset
 535  * PCIC_xxx: device class
 536  * PCIS_xxx: device subclass
 537  * PCIP_xxx: device programming interface
 538  * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
 539  * PCID_xxx: device ID
 540  */
 541 #define PCIR_DEVVENDOR          0x00
 542 #define PCIR_VENDOR             0x00
 543 #define PCIR_DEVICE             0x02
 544 #define PCIR_COMMAND            0x04
 545 #define PCIM_CMD_PORTEN         0x0001
 546 #define PCIM_CMD_MEMEN          0x0002
 547 #define PCIM_CMD_BUSMASTEREN    0x0004
 548 #define PCIM_CMD_MWRICEN        0x0010
 549 #define PCIM_CMD_PERRESPEN      0x0040
 550 #define PCIM_CMD_SERRESPEN      0x0100
 551 #define PCIR_STATUS             0x06
 552 #define PCIR_REVID              0x08
 553 #define PCIR_PROGIF             0x09
 554 #define PCIR_SUBCLASS           0x0a
 555 #define PCIR_CLASS              0x0b
 556 #define PCIR_CACHELNSZ          0x0c
 557 #define PCIR_LATTIMER           0x0d
 558 #define PCIR_HEADERTYPE         0x0e
 559 #define PCIM_MFDEV              0x80
 560 #define PCIR_BIST               0x0f
 561 #define PCIR_CAP_PTR            0x34
 562
 563 /* config registers for header type 0 devices */
 564 #define PCIR_MAPS       0x10
 565 #define PCIR_SUBVEND_0  0x2c
 566 #define PCIR_SUBDEV_0   0x2e
 567
 568 extern struct pci_driver aic7xxx_pci_driver;
 569
 570 typedef enum
 571 {
 572         AHC_POWER_STATE_D0,
 573         AHC_POWER_STATE_D1,
 574         AHC_POWER_STATE_D2,
 575         AHC_POWER_STATE_D3
 576 } ahc_power_state;
 577
 578 /**************************** VL/EISA Routines ********************************/
 579 #ifdef CONFIG_EISA
 580 int                      ahc_linux_eisa_init(void);
 581 void                     ahc_linux_eisa_exit(void);
 582 int                      aic7770_map_registers(struct ahc_softc *ahc,
 583                                                u_int port);
 584 int                      aic7770_map_int(struct ahc_softc *ahc, u_int irq);
 585 #else
 586 static inline int       ahc_linux_eisa_init(void) {
 587         return -ENODEV;
 588 }
 589 static inline void      ahc_linux_eisa_exit(void) {
 590 }
 591 #endif
 592
 593 /******************************* PCI Routines *********************************/
 594 #ifdef CONFIG_PCI
 595 int                      ahc_linux_pci_init(void);
 596 void                     ahc_linux_pci_exit(void);
 597 int                      ahc_pci_map_registers(struct ahc_softc *ahc);
 598 int                      ahc_pci_map_int(struct ahc_softc *ahc);
 599
 600 static __inline uint32_t ahc_pci_read_config(ahc_dev_softc_t pci,
 601                                              int reg, int width);
 602
 603 static __inline uint32_t
 604 ahc_pci_read_config(ahc_dev_softc_t pci, int reg, int width)
 605 {
 606         switch (width) {
 607         case 1:
 608         {
 609                 uint8_t retval;
 610
 611                 pci_read_config_byte(pci, reg, &retval);
 612                 return (retval);
 613         }
 614         case 2:
 615         {
 616                 uint16_t retval;
 617                 pci_read_config_word(pci, reg, &retval);
 618                 return (retval);
 619         }
 620         case 4:
 621         {
 622                 uint32_t retval;
 623                 pci_read_config_dword(pci, reg, &retval);
 624                 return (retval);
 625         }
 626         default:
 627                 panic("ahc_pci_read_config: Read size too big");
 628                 /* NOTREACHED */
 629                 return (0);
 630         }
 631 }
 632
 633 static __inline void ahc_pci_write_config(ahc_dev_softc_t pci,
 634                                           int reg, uint32_t value,
 635                                           int width);
 636
 637 static __inline void
 638 ahc_pci_write_config(ahc_dev_softc_t pci, int reg, uint32_t value, int width)
 639 {
 640         switch (width) {
 641         case 1:
 642                 pci_write_config_byte(pci, reg, value);
 643                 break;
 644         case 2:
 645                 pci_write_config_word(pci, reg, value);
 646                 break;
 647         case 4:
 648                 pci_write_config_dword(pci, reg, value);
 649                 break;
 650         default:
 651                 panic("ahc_pci_write_config: Write size too big");
 652                 /* NOTREACHED */
 653         }
 654 }
 655
 656 static __inline int ahc_get_pci_function(ahc_dev_softc_t);
 657 static __inline int
 658 ahc_get_pci_function(ahc_dev_softc_t pci)
 659 {
 660         return (PCI_FUNC(pci->devfn));
 661 }
 662
 663 static __inline int ahc_get_pci_slot(ahc_dev_softc_t);
 664 static __inline int
 665 ahc_get_pci_slot(ahc_dev_softc_t pci)
 666 {
 667         return (PCI_SLOT(pci->devfn));
 668 }
 669
 670 static __inline int ahc_get_pci_bus(ahc_dev_softc_t);
 671 static __inline int
 672 ahc_get_pci_bus(ahc_dev_softc_t pci)
 673 {
 674         return (pci->bus->number);
 675 }
 676 #else
 677 static inline int ahc_linux_pci_init(void) {
 678         return 0;
 679 }
 680 static inline void ahc_linux_pci_exit(void) {
 681 }
 682 #endif
 683
 684 static __inline void ahc_flush_device_writes(struct ahc_softc *);
 685 static __inline void
 686 ahc_flush_device_writes(struct ahc_softc *ahc)
 687 {
 688         /* XXX Is this sufficient for all architectures??? */
 689         ahc_inb(ahc, INTSTAT);
 690 }
 691
 692 /**************************** Proc FS Support *********************************/
 693 int     ahc_linux_proc_info(struct Scsi_Host *, char *, char **,
 694                             off_t, int, int);
 695
 696 /*************************** Domain Validation ********************************/
 697 /*********************** Transaction Access Wrappers *************************/
 698 static __inline void ahc_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
 699 static __inline void ahc_set_transaction_status(struct scb *, uint32_t);
 700 static __inline void ahc_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
 701 static __inline void ahc_set_scsi_status(struct scb *, uint32_t);
 702 static __inline uint32_t ahc_cmd_get_transaction_status(struct scsi_cmnd *cmd);
 703 static __inline uint32_t ahc_get_transaction_status(struct scb *);
 704 static __inline uint32_t ahc_cmd_get_scsi_status(struct scsi_cmnd *cmd);
 705 static __inline uint32_t ahc_get_scsi_status(struct scb *);
 706 static __inline void ahc_set_transaction_tag(struct scb *, int, u_int);
 707 static __inline u_long ahc_get_transfer_length(struct scb *);
 708 static __inline int ahc_get_transfer_dir(struct scb *);
 709 static __inline void ahc_set_residual(struct scb *, u_long);
 710 static __inline void ahc_set_sense_residual(struct scb *scb, u_long resid);
 711 static __inline u_long ahc_get_residual(struct scb *);
 712 static __inline u_long ahc_get_sense_residual(struct scb *);
 713 static __inline int ahc_perform_autosense(struct scb *);
 714 static __inline uint32_t ahc_get_sense_bufsize(struct ahc_softc *,
 715                                                struct scb *);
 716 static __inline void ahc_notify_xfer_settings_change(struct ahc_softc *,
 717                                                      struct ahc_devinfo *);
 718 static __inline void ahc_platform_scb_free(struct ahc_softc *ahc,
 719                                            struct scb *scb);
 720 static __inline void ahc_freeze_scb(struct scb *scb);
 721
 722 static __inline
 723 void ahc_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
 724 {
 725         cmd->result &= ~(CAM_STATUS_MASK << 16);
 726         cmd->result |= status << 16;
 727 }
 728
 729 static __inline
 730 void ahc_set_transaction_status(struct scb *scb, uint32_t status)
 731 {
 732         ahc_cmd_set_transaction_status(scb->io_ctx,status);
 733 }
 734
 735 static __inline
 736 void ahc_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
 737 {
 738         cmd->result &= ~0xFFFF;
 739         cmd->result |= status;
 740 }
 741
 742 static __inline
 743 void ahc_set_scsi_status(struct scb *scb, uint32_t status)
 744 {
 745         ahc_cmd_set_scsi_status(scb->io_ctx, status);
 746 }
 747
 748 static __inline
 749 uint32_t ahc_cmd_get_transaction_status(struct scsi_cmnd *cmd)
 750 {
 751         return ((cmd->result >> 16) & CAM_STATUS_MASK);
 752 }
 753
 754 static __inline
 755 uint32_t ahc_get_transaction_status(struct scb *scb)
 756 {
 757         return (ahc_cmd_get_transaction_status(scb->io_ctx));
 758 }
 759
 760 static __inline
 761 uint32_t ahc_cmd_get_scsi_status(struct scsi_cmnd *cmd)
 762 {
 763         return (cmd->result & 0xFFFF);
 764 }
 765
 766 static __inline
 767 uint32_t ahc_get_scsi_status(struct scb *scb)
 768 {
 769         return (ahc_cmd_get_scsi_status(scb->io_ctx));
 770 }
 771
 772 static __inline
 773 void ahc_set_transaction_tag(struct scb *scb, int enabled, u_int type)
 774 {
 775         /*
 776          * Nothing to do for linux as the incoming transaction
 777          * has no concept of tag/non tagged, etc.
 778          */
 779 }
 780
 781 static __inline
 782 u_long ahc_get_transfer_length(struct scb *scb)
 783 {
 784         return (scb->platform_data->xfer_len);
 785 }
 786
 787 static __inline
 788 int ahc_get_transfer_dir(struct scb *scb)
 789 {
 790         return (scb->io_ctx->sc_data_direction);
 791 }
 792
 793 static __inline
 794 void ahc_set_residual(struct scb *scb, u_long resid)
 795 {
 796         scb->io_ctx->resid = resid;
 797 }
 798
 799 static __inline
 800 void ahc_set_sense_residual(struct scb *scb, u_long resid)
 801 {
 802         scb->platform_data->sense_resid = resid;
 803 }
 804
 805 static __inline
 806 u_long ahc_get_residual(struct scb *scb)
 807 {
 808         return (scb->io_ctx->resid);
 809 }
 810
 811 static __inline
 812 u_long ahc_get_sense_residual(struct scb *scb)
 813 {
 814         return (scb->platform_data->sense_resid);
 815 }
 816
 817 static __inline
 818 int ahc_perform_autosense(struct scb *scb)
 819 {
 820         /*
 821          * We always perform autosense in Linux.
 822          * On other platforms this is set on a
 823          * per-transaction basis.
 824          */
 825         return (1);
 826 }
 827
 828 static __inline uint32_t
 829 ahc_get_sense_bufsize(struct ahc_softc *ahc, struct scb *scb)
 830 {
 831         return (sizeof(struct scsi_sense_data));
 832 }
 833
 834 static __inline void
 835 ahc_notify_xfer_settings_change(struct ahc_softc *ahc,
 836                                 struct ahc_devinfo *devinfo)
 837 {
 838         /* Nothing to do here for linux */
 839 }
 840
 841 static __inline void
 842 ahc_platform_scb_free(struct ahc_softc *ahc, struct scb *scb)
 843 {
 844 }
 845
 846 int     ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg);
 847 void    ahc_platform_free(struct ahc_softc *ahc);
 848 void    ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb);
 849
 850 static __inline void
 851 ahc_freeze_scb(struct scb *scb)
 852 {
 853         if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
 854                 scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
 855                 scb->platform_data->dev->qfrozen++;
 856         }
 857 }
 858
 859 void    ahc_platform_set_tags(struct ahc_softc *ahc,
 860                               struct ahc_devinfo *devinfo, ahc_queue_alg);
 861 int     ahc_platform_abort_scbs(struct ahc_softc *ahc, int target,
 862                                 char channel, int lun, u_int tag,
 863                                 role_t role, uint32_t status);
 864 irqreturn_t
 865         ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs);
 866 void    ahc_platform_flushwork(struct ahc_softc *ahc);
 867 void    ahc_done(struct ahc_softc*, struct scb*);
 868 void    ahc_send_async(struct ahc_softc *, char channel,
 869                        u_int target, u_int lun, ac_code, void *);
 870 void    ahc_print_path(struct ahc_softc *, struct scb *);
 871 void    ahc_platform_dump_card_state(struct ahc_softc *ahc);
 872
 873 #ifdef CONFIG_PCI
 874 #define AHC_PCI_CONFIG 1
 875 #else
 876 #define AHC_PCI_CONFIG 0
 877 #endif
 878 #define bootverbose aic7xxx_verbose
 879 extern u_int aic7xxx_verbose;
 880 #endif /* _AIC7XXX_LINUX_H_ */