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/smp_lock.h>
  51 #include <linux/interrupt.h>
  52 #include <linux/module.h>
  53 #include <linux/slab.h>
  54 #include <asm/byteorder.h>
  55 #include <asm/io.h>
  56
  57 #include <scsi/scsi.h>
  58 #include <scsi/scsi_cmnd.h>
  59 #include <scsi/scsi_eh.h>
  60 #include <scsi/scsi_device.h>
  61 #include <scsi/scsi_host.h>
  62 #include <scsi/scsi_tcq.h>
  63 #include <scsi/scsi_transport.h>
  64 #include <scsi/scsi_transport_spi.h>
  65
  66 /* Core SCSI definitions */
  67 #define AIC_LIB_PREFIX ahd
  68
  69 /* Name space conflict with BSD queue macros */
  70 #ifdef LIST_HEAD
  71 #undef LIST_HEAD
  72 #endif
  73
  74 #include "cam.h"
  75 #include "queue.h"
  76 #include "scsi_message.h"
  77 #include "scsi_iu.h"
  78 #include "aiclib.h"
  79
  80 /*********************************** Debugging ********************************/
  81 #ifdef CONFIG_AIC79XX_DEBUG_ENABLE
  82 #ifdef CONFIG_AIC79XX_DEBUG_MASK
  83 #define AHD_DEBUG 1
  84 #define AHD_DEBUG_OPTS CONFIG_AIC79XX_DEBUG_MASK
  85 #else
  86 /*
  87  * Compile in debugging code, but do not enable any printfs.
  88  */
  89 #define AHD_DEBUG 1
  90 #define AHD_DEBUG_OPTS 0
  91 #endif
  92 /* No debugging code. */
  93 #endif
  94
  95 /********************************** Misc Macros *******************************/
  96 #define powerof2(x)     ((((x)-1)&(x))==0)
  97
  98 /************************* Forward Declarations *******************************/
  99 struct ahd_softc;
 100 typedef struct pci_dev *ahd_dev_softc_t;
 101 typedef struct scsi_cmnd      *ahd_io_ctx_t;
 102
 103 /******************************* Byte Order ***********************************/
 104 #define ahd_htobe16(x)  cpu_to_be16(x)
 105 #define ahd_htobe32(x)  cpu_to_be32(x)
 106 #define ahd_htobe64(x)  cpu_to_be64(x)
 107 #define ahd_htole16(x)  cpu_to_le16(x)
 108 #define ahd_htole32(x)  cpu_to_le32(x)
 109 #define ahd_htole64(x)  cpu_to_le64(x)
 110
 111 #define ahd_be16toh(x)  be16_to_cpu(x)
 112 #define ahd_be32toh(x)  be32_to_cpu(x)
 113 #define ahd_be64toh(x)  be64_to_cpu(x)
 114 #define ahd_le16toh(x)  le16_to_cpu(x)
 115 #define ahd_le32toh(x)  le32_to_cpu(x)
 116 #define ahd_le64toh(x)  le64_to_cpu(x)
 117
 118 /************************* Configuration Data *********************************/
 119 extern uint32_t aic79xx_allow_memio;
 120 extern struct scsi_host_template aic79xx_driver_template;
 121
 122 /***************************** Bus Space/DMA **********************************/
 123
 124 typedef uint32_t bus_size_t;
 125
 126 typedef enum {
 127         BUS_SPACE_MEMIO,
 128         BUS_SPACE_PIO
 129 } bus_space_tag_t;
 130
 131 typedef union {
 132         u_long            ioport;
 133         volatile uint8_t __iomem *maddr;
 134 } bus_space_handle_t;
 135
 136 typedef struct bus_dma_segment
 137 {
 138         dma_addr_t      ds_addr;
 139         bus_size_t      ds_len;
 140 } bus_dma_segment_t;
 141
 142 struct ahd_linux_dma_tag
 143 {
 144         bus_size_t      alignment;
 145         bus_size_t      boundary;
 146         bus_size_t      maxsize;
 147 };
 148 typedef struct ahd_linux_dma_tag* bus_dma_tag_t;
 149
 150 typedef dma_addr_t bus_dmamap_t;
 151
 152 typedef int bus_dma_filter_t(void*, dma_addr_t);
 153 typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
 154
 155 #define BUS_DMA_WAITOK          0x0
 156 #define BUS_DMA_NOWAIT          0x1
 157 #define BUS_DMA_ALLOCNOW        0x2
 158 #define BUS_DMA_LOAD_SEGS       0x4     /*
 159                                          * Argument is an S/G list not
 160                                          * a single buffer.
 161                                          */
 162
 163 #define BUS_SPACE_MAXADDR       0xFFFFFFFF
 164 #define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
 165 #define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
 166
 167 int     ahd_dma_tag_create(struct ahd_softc *, bus_dma_tag_t /*parent*/,
 168                            bus_size_t /*alignment*/, bus_size_t /*boundary*/,
 169                            dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
 170                            bus_dma_filter_t*/*filter*/, void */*filterarg*/,
 171                            bus_size_t /*maxsize*/, int /*nsegments*/,
 172                            bus_size_t /*maxsegsz*/, int /*flags*/,
 173                            bus_dma_tag_t */*dma_tagp*/);
 174
 175 void    ahd_dma_tag_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/);
 176
 177 int     ahd_dmamem_alloc(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
 178                          void** /*vaddr*/, int /*flags*/,
 179                          bus_dmamap_t* /*mapp*/);
 180
 181 void    ahd_dmamem_free(struct ahd_softc *, bus_dma_tag_t /*dmat*/,
 182                         void* /*vaddr*/, bus_dmamap_t /*map*/);
 183
 184 void    ahd_dmamap_destroy(struct ahd_softc *, bus_dma_tag_t /*tag*/,
 185                            bus_dmamap_t /*map*/);
 186
 187 int     ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t /*dmat*/,
 188                         bus_dmamap_t /*map*/, void * /*buf*/,
 189                         bus_size_t /*buflen*/, bus_dmamap_callback_t *,
 190                         void */*callback_arg*/, int /*flags*/);
 191
 192 int     ahd_dmamap_unload(struct ahd_softc *, bus_dma_tag_t, bus_dmamap_t);
 193
 194 /*
 195  * Operations performed by ahd_dmamap_sync().
 196  */
 197 #define BUS_DMASYNC_PREREAD     0x01    /* pre-read synchronization */
 198 #define BUS_DMASYNC_POSTREAD    0x02    /* post-read synchronization */
 199 #define BUS_DMASYNC_PREWRITE    0x04    /* pre-write synchronization */
 200 #define BUS_DMASYNC_POSTWRITE   0x08    /* post-write synchronization */
 201
 202 /*
 203  * XXX
 204  * ahd_dmamap_sync is only used on buffers allocated with
 205  * the pci_alloc_consistent() API.  Although I'm not sure how
 206  * this works on architectures with a write buffer, Linux does
 207  * not have an API to sync "coherent" memory.  Perhaps we need
 208  * to do an mb()?
 209  */
 210 #define ahd_dmamap_sync(ahd, dma_tag, dmamap, offset, len, op)
 211
 212 /************************** Timer DataStructures ******************************/
 213 typedef struct timer_list ahd_timer_t;
 214
 215 /********************************** Includes **********************************/
 216 #ifdef CONFIG_AIC79XX_REG_PRETTY_PRINT
 217 #define AIC_DEBUG_REGISTERS 1
 218 #else
 219 #define AIC_DEBUG_REGISTERS 0
 220 #endif
 221 #include "aic79xx.h"
 222
 223 /***************************** Timer Facilities *******************************/
 224 #define ahd_timer_init init_timer
 225 #define ahd_timer_stop del_timer_sync
 226 typedef void ahd_linux_callback_t (u_long);
 227 static __inline void ahd_timer_reset(ahd_timer_t *timer, int usec,
 228                                      ahd_callback_t *func, void *arg);
 229
 230 static __inline void
 231 ahd_timer_reset(ahd_timer_t *timer, int usec, ahd_callback_t *func, void *arg)
 232 {
 233         struct ahd_softc *ahd;
 234
 235         ahd = (struct ahd_softc *)arg;
 236         del_timer(timer);
 237         timer->data = (u_long)arg;
 238         timer->expires = jiffies + (usec * HZ)/1000000;
 239         timer->function = (ahd_linux_callback_t*)func;
 240         add_timer(timer);
 241 }
 242
 243 /***************************** SMP support ************************************/
 244 #include <linux/spinlock.h>
 245
 246 #define AIC79XX_DRIVER_VERSION "3.0"
 247
 248 /*************************** Device Data Structures ***************************/
 249 /*
 250  * A per probed device structure used to deal with some error recovery
 251  * scenarios that the Linux mid-layer code just doesn't know how to
 252  * handle.  The structure allocated for a device only becomes persistent
 253  * after a successfully completed inquiry command to the target when
 254  * that inquiry data indicates a lun is present.
 255  */
 256
 257 typedef enum {
 258         AHD_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
 259         AHD_DEV_Q_BASIC          = 0x10, /* Allow basic device queuing */
 260         AHD_DEV_Q_TAGGED         = 0x20, /* Allow full SCSI2 command queueing */
 261         AHD_DEV_PERIODIC_OTAG    = 0x40, /* Send OTAG to prevent starvation */
 262 } ahd_linux_dev_flags;
 263
 264 struct ahd_linux_device {
 265         TAILQ_ENTRY(ahd_linux_device) links;
 266
 267         /*
 268          * The number of transactions currently
 269          * queued to the device.
 270          */
 271         int                     active;
 272
 273         /*
 274          * The currently allowed number of
 275          * transactions that can be queued to
 276          * the device.  Must be signed for
 277          * conversion from tagged to untagged
 278          * mode where the device may have more
 279          * than one outstanding active transaction.
 280          */
 281         int                     openings;
 282
 283         /*
 284          * A positive count indicates that this
 285          * device's queue is halted.
 286          */
 287         u_int                   qfrozen;
 288
 289         /*
 290          * Cumulative command counter.
 291          */
 292         u_long                  commands_issued;
 293
 294         /*
 295          * The number of tagged transactions when
 296          * running at our current opening level
 297          * that have been successfully received by
 298          * this device since the last QUEUE FULL.
 299          */
 300         u_int                   tag_success_count;
 301 #define AHD_TAG_SUCCESS_INTERVAL 50
 302
 303         ahd_linux_dev_flags     flags;
 304
 305         /*
 306          * Per device timer.
 307          */
 308         struct timer_list       timer;
 309
 310         /*
 311          * The high limit for the tags variable.
 312          */
 313         u_int                   maxtags;
 314
 315         /*
 316          * The computed number of tags outstanding
 317          * at the time of the last QUEUE FULL event.
 318          */
 319         u_int                   tags_on_last_queuefull;
 320
 321         /*
 322          * How many times we have seen a queue full
 323          * with the same number of tags.  This is used
 324          * to stop our adaptive queue depth algorithm
 325          * on devices with a fixed number of tags.
 326          */
 327         u_int                   last_queuefull_same_count;
 328 #define AHD_LOCK_TAGS_COUNT 50
 329
 330         /*
 331          * How many transactions have been queued
 332          * without the device going idle.  We use
 333          * this statistic to determine when to issue
 334          * an ordered tag to prevent transaction
 335          * starvation.  This statistic is only updated
 336          * if the AHD_DEV_PERIODIC_OTAG flag is set
 337          * on this device.
 338          */
 339         u_int                   commands_since_idle_or_otag;
 340 #define AHD_OTAG_THRESH 500
 341 };
 342
 343 /********************* Definitions Required by the Core ***********************/
 344 /*
 345  * Number of SG segments we require.  So long as the S/G segments for
 346  * a particular transaction are allocated in a physically contiguous
 347  * manner and are allocated below 4GB, the number of S/G segments is
 348  * unrestricted.
 349  */
 350 #define AHD_NSEG 128
 351
 352 /*
 353  * Per-SCB OSM storage.
 354  */
 355 struct scb_platform_data {
 356         struct ahd_linux_device *dev;
 357         dma_addr_t               buf_busaddr;
 358         uint32_t                 xfer_len;
 359         uint32_t                 sense_resid;   /* Auto-Sense residual */
 360 };
 361
 362 /*
 363  * Define a structure used for each host adapter.  All members are
 364  * aligned on a boundary >= the size of the member to honor the
 365  * alignment restrictions of the various platforms supported by
 366  * this driver.
 367  */
 368 struct ahd_platform_data {
 369         /*
 370          * Fields accessed from interrupt context.
 371          */
 372         struct scsi_target *starget[AHD_NUM_TARGETS];
 373
 374         spinlock_t               spin_lock;
 375         struct completion       *eh_done;
 376         struct Scsi_Host        *host;          /* pointer to scsi host */
 377 #define AHD_LINUX_NOIRQ ((uint32_t)~0)
 378         uint32_t                 irq;           /* IRQ for this adapter */
 379         uint32_t                 bios_address;
 380         uint32_t                 mem_busaddr;   /* Mem Base Addr */
 381 };
 382
 383 /************************** OS Utility Wrappers *******************************/
 384 #define printf printk
 385 #define M_NOWAIT GFP_ATOMIC
 386 #define M_WAITOK 0
 387 #define malloc(size, type, flags) kmalloc(size, flags)
 388 #define free(ptr, type) kfree(ptr)
 389
 390 static __inline void ahd_delay(long);
 391 static __inline void
 392 ahd_delay(long usec)
 393 {
 394         /*
 395          * udelay on Linux can have problems for
 396          * multi-millisecond waits.  Wait at most
 397          * 1024us per call.
 398          */
 399         while (usec > 0) {
 400                 udelay(usec % 1024);
 401                 usec -= 1024;
 402         }
 403 }
 404
 405
 406 /***************************** Low Level I/O **********************************/
 407 static __inline uint8_t ahd_inb(struct ahd_softc * ahd, long port);
 408 static __inline uint16_t ahd_inw_atomic(struct ahd_softc * ahd, long port);
 409 static __inline void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
 410 static __inline void ahd_outw_atomic(struct ahd_softc * ahd,
 411                                      long port, uint16_t val);
 412 static __inline void ahd_outsb(struct ahd_softc * ahd, long port,
 413                                uint8_t *, int count);
 414 static __inline void ahd_insb(struct ahd_softc * ahd, long port,
 415                                uint8_t *, int count);
 416
 417 static __inline uint8_t
 418 ahd_inb(struct ahd_softc * ahd, long port)
 419 {
 420         uint8_t x;
 421
 422         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 423                 x = readb(ahd->bshs[0].maddr + port);
 424         } else {
 425                 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
 426         }
 427         mb();
 428         return (x);
 429 }
 430
 431 static __inline uint16_t
 432 ahd_inw_atomic(struct ahd_softc * ahd, long port)
 433 {
 434         uint8_t x;
 435
 436         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 437                 x = readw(ahd->bshs[0].maddr + port);
 438         } else {
 439                 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
 440         }
 441         mb();
 442         return (x);
 443 }
 444
 445 static __inline void
 446 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
 447 {
 448         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 449                 writeb(val, ahd->bshs[0].maddr + port);
 450         } else {
 451                 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
 452         }
 453         mb();
 454 }
 455
 456 static __inline void
 457 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
 458 {
 459         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 460                 writew(val, ahd->bshs[0].maddr + port);
 461         } else {
 462                 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
 463         }
 464         mb();
 465 }
 466
 467 static __inline void
 468 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
 469 {
 470         int i;
 471
 472         /*
 473          * There is probably a more efficient way to do this on Linux
 474          * but we don't use this for anything speed critical and this
 475          * should work.
 476          */
 477         for (i = 0; i < count; i++)
 478                 ahd_outb(ahd, port, *array++);
 479 }
 480
 481 static __inline void
 482 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
 483 {
 484         int i;
 485
 486         /*
 487          * There is probably a more efficient way to do this on Linux
 488          * but we don't use this for anything speed critical and this
 489          * should work.
 490          */
 491         for (i = 0; i < count; i++)
 492                 *array++ = ahd_inb(ahd, port);
 493 }
 494
 495 /**************************** Initialization **********************************/
 496 int             ahd_linux_register_host(struct ahd_softc *,
 497                                         struct scsi_host_template *);
 498
 499 /*************************** Pretty Printing **********************************/
 500 struct info_str {
 501         char *buffer;
 502         int length;
 503         off_t offset;
 504         int pos;
 505 };
 506
 507 /******************************** Locking *************************************/
 508 static __inline void
 509 ahd_lockinit(struct ahd_softc *ahd)
 510 {
 511         spin_lock_init(&ahd->platform_data->spin_lock);
 512 }
 513
 514 static __inline void
 515 ahd_lock(struct ahd_softc *ahd, unsigned long *flags)
 516 {
 517         spin_lock_irqsave(&ahd->platform_data->spin_lock, *flags);
 518 }
 519
 520 static __inline void
 521 ahd_unlock(struct ahd_softc *ahd, unsigned long *flags)
 522 {
 523         spin_unlock_irqrestore(&ahd->platform_data->spin_lock, *flags);
 524 }
 525
 526 /******************************* PCI Definitions ******************************/
 527 /*
 528  * PCIM_xxx: mask to locate subfield in register
 529  * PCIR_xxx: config register offset
 530  * PCIC_xxx: device class
 531  * PCIS_xxx: device subclass
 532  * PCIP_xxx: device programming interface
 533  * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
 534  * PCID_xxx: device ID
 535  */
 536 #define PCIR_DEVVENDOR          0x00
 537 #define PCIR_VENDOR             0x00
 538 #define PCIR_DEVICE             0x02
 539 #define PCIR_COMMAND            0x04
 540 #define PCIM_CMD_PORTEN         0x0001
 541 #define PCIM_CMD_MEMEN          0x0002
 542 #define PCIM_CMD_BUSMASTEREN    0x0004
 543 #define PCIM_CMD_MWRICEN        0x0010
 544 #define PCIM_CMD_PERRESPEN      0x0040
 545 #define PCIM_CMD_SERRESPEN      0x0100
 546 #define PCIR_STATUS             0x06
 547 #define PCIR_REVID              0x08
 548 #define PCIR_PROGIF             0x09
 549 #define PCIR_SUBCLASS           0x0a
 550 #define PCIR_CLASS              0x0b
 551 #define PCIR_CACHELNSZ          0x0c
 552 #define PCIR_LATTIMER           0x0d
 553 #define PCIR_HEADERTYPE         0x0e
 554 #define PCIM_MFDEV              0x80
 555 #define PCIR_BIST               0x0f
 556 #define PCIR_CAP_PTR            0x34
 557
 558 /* config registers for header type 0 devices */
 559 #define PCIR_MAPS       0x10
 560 #define PCIR_SUBVEND_0  0x2c
 561 #define PCIR_SUBDEV_0   0x2e
 562
 563 /****************************** PCI-X definitions *****************************/
 564 #define PCIXR_COMMAND   0x96
 565 #define PCIXR_DEVADDR   0x98
 566 #define PCIXM_DEVADDR_FNUM      0x0003  /* Function Number */
 567 #define PCIXM_DEVADDR_DNUM      0x00F8  /* Device Number */
 568 #define PCIXM_DEVADDR_BNUM      0xFF00  /* Bus Number */
 569 #define PCIXR_STATUS    0x9A
 570 #define PCIXM_STATUS_64BIT      0x0001  /* Active 64bit connection to device. */
 571 #define PCIXM_STATUS_133CAP     0x0002  /* Device is 133MHz capable */
 572 #define PCIXM_STATUS_SCDISC     0x0004  /* Split Completion Discarded */
 573 #define PCIXM_STATUS_UNEXPSC    0x0008  /* Unexpected Split Completion */
 574 #define PCIXM_STATUS_CMPLEXDEV  0x0010  /* Device Complexity (set == bridge) */
 575 #define PCIXM_STATUS_MAXMRDBC   0x0060  /* Maximum Burst Read Count */
 576 #define PCIXM_STATUS_MAXSPLITS  0x0380  /* Maximum Split Transactions */
 577 #define PCIXM_STATUS_MAXCRDS    0x1C00  /* Maximum Cumulative Read Size */
 578 #define PCIXM_STATUS_RCVDSCEM   0x2000  /* Received a Split Comp w/Error msg */
 579
 580 typedef enum
 581 {
 582         AHD_POWER_STATE_D0,
 583         AHD_POWER_STATE_D1,
 584         AHD_POWER_STATE_D2,
 585         AHD_POWER_STATE_D3
 586 } ahd_power_state;
 587
 588 void ahd_power_state_change(struct ahd_softc *ahd,
 589                             ahd_power_state new_state);
 590
 591 /******************************* PCI Routines *********************************/
 592 int                      ahd_linux_pci_init(void);
 593 void                     ahd_linux_pci_exit(void);
 594 int                      ahd_pci_map_registers(struct ahd_softc *ahd);
 595 int                      ahd_pci_map_int(struct ahd_softc *ahd);
 596
 597 static __inline uint32_t ahd_pci_read_config(ahd_dev_softc_t pci,
 598                                              int reg, int width);
 599
 600 static __inline uint32_t
 601 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
 602 {
 603         switch (width) {
 604         case 1:
 605         {
 606                 uint8_t retval;
 607
 608                 pci_read_config_byte(pci, reg, &retval);
 609                 return (retval);
 610         }
 611         case 2:
 612         {
 613                 uint16_t retval;
 614                 pci_read_config_word(pci, reg, &retval);
 615                 return (retval);
 616         }
 617         case 4:
 618         {
 619                 uint32_t retval;
 620                 pci_read_config_dword(pci, reg, &retval);
 621                 return (retval);
 622         }
 623         default:
 624                 panic("ahd_pci_read_config: Read size too big");
 625                 /* NOTREACHED */
 626                 return (0);
 627         }
 628 }
 629
 630 static __inline void ahd_pci_write_config(ahd_dev_softc_t pci,
 631                                           int reg, uint32_t value,
 632                                           int width);
 633
 634 static __inline void
 635 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
 636 {
 637         switch (width) {
 638         case 1:
 639                 pci_write_config_byte(pci, reg, value);
 640                 break;
 641         case 2:
 642                 pci_write_config_word(pci, reg, value);
 643                 break;
 644         case 4:
 645                 pci_write_config_dword(pci, reg, value);
 646                 break;
 647         default:
 648                 panic("ahd_pci_write_config: Write size too big");
 649                 /* NOTREACHED */
 650         }
 651 }
 652
 653 static __inline int ahd_get_pci_function(ahd_dev_softc_t);
 654 static __inline int
 655 ahd_get_pci_function(ahd_dev_softc_t pci)
 656 {
 657         return (PCI_FUNC(pci->devfn));
 658 }
 659
 660 static __inline int ahd_get_pci_slot(ahd_dev_softc_t);
 661 static __inline int
 662 ahd_get_pci_slot(ahd_dev_softc_t pci)
 663 {
 664         return (PCI_SLOT(pci->devfn));
 665 }
 666
 667 static __inline int ahd_get_pci_bus(ahd_dev_softc_t);
 668 static __inline int
 669 ahd_get_pci_bus(ahd_dev_softc_t pci)
 670 {
 671         return (pci->bus->number);
 672 }
 673
 674 static __inline void ahd_flush_device_writes(struct ahd_softc *);
 675 static __inline void
 676 ahd_flush_device_writes(struct ahd_softc *ahd)
 677 {
 678         /* XXX Is this sufficient for all architectures??? */
 679         ahd_inb(ahd, INTSTAT);
 680 }
 681
 682 /**************************** Proc FS Support *********************************/
 683 int     ahd_linux_proc_info(struct Scsi_Host *, char *, char **,
 684                             off_t, int, int);
 685
 686 /*********************** Transaction Access Wrappers **************************/
 687 static __inline void ahd_cmd_set_transaction_status(struct scsi_cmnd *, uint32_t);
 688 static __inline void ahd_set_transaction_status(struct scb *, uint32_t);
 689 static __inline void ahd_cmd_set_scsi_status(struct scsi_cmnd *, uint32_t);
 690 static __inline void ahd_set_scsi_status(struct scb *, uint32_t);
 691 static __inline uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd);
 692 static __inline uint32_t ahd_get_transaction_status(struct scb *);
 693 static __inline uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd);
 694 static __inline uint32_t ahd_get_scsi_status(struct scb *);
 695 static __inline void ahd_set_transaction_tag(struct scb *, int, u_int);
 696 static __inline u_long ahd_get_transfer_length(struct scb *);
 697 static __inline int ahd_get_transfer_dir(struct scb *);
 698 static __inline void ahd_set_residual(struct scb *, u_long);
 699 static __inline void ahd_set_sense_residual(struct scb *scb, u_long resid);
 700 static __inline u_long ahd_get_residual(struct scb *);
 701 static __inline u_long ahd_get_sense_residual(struct scb *);
 702 static __inline int ahd_perform_autosense(struct scb *);
 703 static __inline uint32_t ahd_get_sense_bufsize(struct ahd_softc *,
 704                                                struct scb *);
 705 static __inline void ahd_notify_xfer_settings_change(struct ahd_softc *,
 706                                                      struct ahd_devinfo *);
 707 static __inline void ahd_platform_scb_free(struct ahd_softc *ahd,
 708                                            struct scb *scb);
 709 static __inline void ahd_freeze_scb(struct scb *scb);
 710
 711 static __inline
 712 void ahd_cmd_set_transaction_status(struct scsi_cmnd *cmd, uint32_t status)
 713 {
 714         cmd->result &= ~(CAM_STATUS_MASK << 16);
 715         cmd->result |= status << 16;
 716 }
 717
 718 static __inline
 719 void ahd_set_transaction_status(struct scb *scb, uint32_t status)
 720 {
 721         ahd_cmd_set_transaction_status(scb->io_ctx,status);
 722 }
 723
 724 static __inline
 725 void ahd_cmd_set_scsi_status(struct scsi_cmnd *cmd, uint32_t status)
 726 {
 727         cmd->result &= ~0xFFFF;
 728         cmd->result |= status;
 729 }
 730
 731 static __inline
 732 void ahd_set_scsi_status(struct scb *scb, uint32_t status)
 733 {
 734         ahd_cmd_set_scsi_status(scb->io_ctx, status);
 735 }
 736
 737 static __inline
 738 uint32_t ahd_cmd_get_transaction_status(struct scsi_cmnd *cmd)
 739 {
 740         return ((cmd->result >> 16) & CAM_STATUS_MASK);
 741 }
 742
 743 static __inline
 744 uint32_t ahd_get_transaction_status(struct scb *scb)
 745 {
 746         return (ahd_cmd_get_transaction_status(scb->io_ctx));
 747 }
 748
 749 static __inline
 750 uint32_t ahd_cmd_get_scsi_status(struct scsi_cmnd *cmd)
 751 {
 752         return (cmd->result & 0xFFFF);
 753 }
 754
 755 static __inline
 756 uint32_t ahd_get_scsi_status(struct scb *scb)
 757 {
 758         return (ahd_cmd_get_scsi_status(scb->io_ctx));
 759 }
 760
 761 static __inline
 762 void ahd_set_transaction_tag(struct scb *scb, int enabled, u_int type)
 763 {
 764         /*
 765          * Nothing to do for linux as the incoming transaction
 766          * has no concept of tag/non tagged, etc.
 767          */
 768 }
 769
 770 static __inline
 771 u_long ahd_get_transfer_length(struct scb *scb)
 772 {
 773         return (scb->platform_data->xfer_len);
 774 }
 775
 776 static __inline
 777 int ahd_get_transfer_dir(struct scb *scb)
 778 {
 779         return (scb->io_ctx->sc_data_direction);
 780 }
 781
 782 static __inline
 783 void ahd_set_residual(struct scb *scb, u_long resid)
 784 {
 785         scb->io_ctx->resid = resid;
 786 }
 787
 788 static __inline
 789 void ahd_set_sense_residual(struct scb *scb, u_long resid)
 790 {
 791         scb->platform_data->sense_resid = resid;
 792 }
 793
 794 static __inline
 795 u_long ahd_get_residual(struct scb *scb)
 796 {
 797         return (scb->io_ctx->resid);
 798 }
 799
 800 static __inline
 801 u_long ahd_get_sense_residual(struct scb *scb)
 802 {
 803         return (scb->platform_data->sense_resid);
 804 }
 805
 806 static __inline
 807 int ahd_perform_autosense(struct scb *scb)
 808 {
 809         /*
 810          * We always perform autosense in Linux.
 811          * On other platforms this is set on a
 812          * per-transaction basis.
 813          */
 814         return (1);
 815 }
 816
 817 static __inline uint32_t
 818 ahd_get_sense_bufsize(struct ahd_softc *ahd, struct scb *scb)
 819 {
 820         return (sizeof(struct scsi_sense_data));
 821 }
 822
 823 static __inline void
 824 ahd_notify_xfer_settings_change(struct ahd_softc *ahd,
 825                                 struct ahd_devinfo *devinfo)
 826 {
 827         /* Nothing to do here for linux */
 828 }
 829
 830 static __inline void
 831 ahd_platform_scb_free(struct ahd_softc *ahd, struct scb *scb)
 832 {
 833         ahd->flags &= ~AHD_RESOURCE_SHORTAGE;
 834 }
 835
 836 int     ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg);
 837 void    ahd_platform_free(struct ahd_softc *ahd);
 838 void    ahd_platform_init(struct ahd_softc *ahd);
 839 void    ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb);
 840 void    ahd_freeze_simq(struct ahd_softc *ahd);
 841 void    ahd_release_simq(struct ahd_softc *ahd);
 842
 843 static __inline void
 844 ahd_freeze_scb(struct scb *scb)
 845 {
 846         if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
 847                 scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
 848                 scb->platform_data->dev->qfrozen++;
 849         }
 850 }
 851
 852 void    ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
 853                               struct ahd_devinfo *devinfo, ahd_queue_alg);
 854 int     ahd_platform_abort_scbs(struct ahd_softc *ahd, int target,
 855                                 char channel, int lun, u_int tag,
 856                                 role_t role, uint32_t status);
 857 irqreturn_t
 858         ahd_linux_isr(int irq, void *dev_id);
 859 void    ahd_done(struct ahd_softc*, struct scb*);
 860 void    ahd_send_async(struct ahd_softc *, char channel,
 861                        u_int target, u_int lun, ac_code);
 862 void    ahd_print_path(struct ahd_softc *, struct scb *);
 863
 864 #ifdef CONFIG_PCI
 865 #define AHD_PCI_CONFIG 1
 866 #else
 867 #define AHD_PCI_CONFIG 0
 868 #endif
 869 #define bootverbose aic79xx_verbose
 870 extern uint32_t aic79xx_verbose;
 871
 872 #endif /* _AIC79XX_LINUX_H_ */