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/smp_lock.h>
  68 #include <linux/version.h>
  69 #include <linux/module.h>
  70 #include <asm/byteorder.h>
  71 #include <asm/io.h>
  72
  73 #include <linux/interrupt.h> /* For tasklet support. */
  74 #include <linux/config.h>
  75 #include <linux/slab.h>
  76
  77 /* Core SCSI definitions */
  78 #define AIC_LIB_PREFIX ahc
  79 #include "scsi.h"
  80 #include <scsi/scsi_host.h>
  81
  82 /* Name space conflict with BSD queue macros */
  83 #ifdef LIST_HEAD
  84 #undef LIST_HEAD
  85 #endif
  86
  87 #include "cam.h"
  88 #include "queue.h"
  89 #include "scsi_message.h"
  90 #include "aiclib.h"
  91
  92 /*********************************** Debugging ********************************/
  93 #ifdef CONFIG_AIC7XXX_DEBUG_ENABLE
  94 #ifdef CONFIG_AIC7XXX_DEBUG_MASK
  95 #define AHC_DEBUG 1
  96 #define AHC_DEBUG_OPTS CONFIG_AIC7XXX_DEBUG_MASK
  97 #else
  98 /*
  99  * Compile in debugging code, but do not enable any printfs.
 100  */
 101 #define AHC_DEBUG 1
 102 #endif
 103 /* No debugging code. */
 104 #endif
 105
 106 /************************* Forward Declarations *******************************/
 107 struct ahc_softc;
 108 typedef struct pci_dev *ahc_dev_softc_t;
 109 typedef Scsi_Cmnd      *ahc_io_ctx_t;
 110
 111 /******************************* Byte Order ***********************************/
 112 #define ahc_htobe16(x)  cpu_to_be16(x)
 113 #define ahc_htobe32(x)  cpu_to_be32(x)
 114 #define ahc_htobe64(x)  cpu_to_be64(x)
 115 #define ahc_htole16(x)  cpu_to_le16(x)
 116 #define ahc_htole32(x)  cpu_to_le32(x)
 117 #define ahc_htole64(x)  cpu_to_le64(x)
 118
 119 #define ahc_be16toh(x)  be16_to_cpu(x)
 120 #define ahc_be32toh(x)  be32_to_cpu(x)
 121 #define ahc_be64toh(x)  be64_to_cpu(x)
 122 #define ahc_le16toh(x)  le16_to_cpu(x)
 123 #define ahc_le32toh(x)  le32_to_cpu(x)
 124 #define ahc_le64toh(x)  le64_to_cpu(x)
 125
 126 #ifndef LITTLE_ENDIAN
 127 #define LITTLE_ENDIAN 1234
 128 #endif
 129
 130 #ifndef BIG_ENDIAN
 131 #define BIG_ENDIAN 4321
 132 #endif
 133
 134 #ifndef BYTE_ORDER
 135 #if defined(__BIG_ENDIAN)
 136 #define BYTE_ORDER BIG_ENDIAN
 137 #endif
 138 #if defined(__LITTLE_ENDIAN)
 139 #define BYTE_ORDER LITTLE_ENDIAN
 140 #endif
 141 #endif /* BYTE_ORDER */
 142
 143 /************************* Configuration Data *********************************/
 144 extern u_int aic7xxx_no_probe;
 145 extern u_int aic7xxx_allow_memio;
 146 extern int aic7xxx_detect_complete;
 147 extern Scsi_Host_Template aic7xxx_driver_template;
 148
 149 /***************************** Bus Space/DMA **********************************/
 150
 151 typedef uint32_t bus_size_t;
 152
 153 typedef enum {
 154         BUS_SPACE_MEMIO,
 155         BUS_SPACE_PIO
 156 } bus_space_tag_t;
 157
 158 typedef union {
 159         u_long            ioport;
 160         volatile uint8_t __iomem *maddr;
 161 } bus_space_handle_t;
 162
 163 typedef struct bus_dma_segment
 164 {
 165         dma_addr_t      ds_addr;
 166         bus_size_t      ds_len;
 167 } bus_dma_segment_t;
 168
 169 struct ahc_linux_dma_tag
 170 {
 171         bus_size_t      alignment;
 172         bus_size_t      boundary;
 173         bus_size_t      maxsize;
 174 };
 175 typedef struct ahc_linux_dma_tag* bus_dma_tag_t;
 176
 177 struct ahc_linux_dmamap
 178 {
 179         dma_addr_t      bus_addr;
 180 };
 181 typedef struct ahc_linux_dmamap* bus_dmamap_t;
 182
 183 typedef int bus_dma_filter_t(void*, dma_addr_t);
 184 typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
 185
 186 #define BUS_DMA_WAITOK          0x0
 187 #define BUS_DMA_NOWAIT          0x1
 188 #define BUS_DMA_ALLOCNOW        0x2
 189 #define BUS_DMA_LOAD_SEGS       0x4     /*
 190                                          * Argument is an S/G list not
 191                                          * a single buffer.
 192                                          */
 193
 194 #define BUS_SPACE_MAXADDR       0xFFFFFFFF
 195 #define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
 196 #define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
 197
 198 int     ahc_dma_tag_create(struct ahc_softc *, bus_dma_tag_t /*parent*/,
 199                            bus_size_t /*alignment*/, bus_size_t /*boundary*/,
 200                            dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/,
 201                            bus_dma_filter_t*/*filter*/, void */*filterarg*/,
 202                            bus_size_t /*maxsize*/, int /*nsegments*/,
 203                            bus_size_t /*maxsegsz*/, int /*flags*/,
 204                            bus_dma_tag_t */*dma_tagp*/);
 205
 206 void    ahc_dma_tag_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/);
 207
 208 int     ahc_dmamem_alloc(struct ahc_softc *, bus_dma_tag_t /*dmat*/,
 209                          void** /*vaddr*/, int /*flags*/,
 210                          bus_dmamap_t* /*mapp*/);
 211
 212 void    ahc_dmamem_free(struct ahc_softc *, bus_dma_tag_t /*dmat*/,
 213                         void* /*vaddr*/, bus_dmamap_t /*map*/);
 214
 215 void    ahc_dmamap_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/,
 216                            bus_dmamap_t /*map*/);
 217
 218 int     ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t /*dmat*/,
 219                         bus_dmamap_t /*map*/, void * /*buf*/,
 220                         bus_size_t /*buflen*/, bus_dmamap_callback_t *,
 221                         void */*callback_arg*/, int /*flags*/);
 222
 223 int     ahc_dmamap_unload(struct ahc_softc *, bus_dma_tag_t, bus_dmamap_t);
 224
 225 /*
 226  * Operations performed by ahc_dmamap_sync().
 227  */
 228 #define BUS_DMASYNC_PREREAD     0x01    /* pre-read synchronization */
 229 #define BUS_DMASYNC_POSTREAD    0x02    /* post-read synchronization */
 230 #define BUS_DMASYNC_PREWRITE    0x04    /* pre-write synchronization */
 231 #define BUS_DMASYNC_POSTWRITE   0x08    /* post-write synchronization */
 232
 233 /*
 234  * XXX
 235  * ahc_dmamap_sync is only used on buffers allocated with
 236  * the pci_alloc_consistent() API.  Although I'm not sure how
 237  * this works on architectures with a write buffer, Linux does
 238  * not have an API to sync "coherent" memory.  Perhaps we need
 239  * to do an mb()?
 240  */
 241 #define ahc_dmamap_sync(ahc, dma_tag, dmamap, offset, len, op)
 242
 243 /************************** Timer DataStructures ******************************/
 244 typedef struct timer_list ahc_timer_t;
 245
 246 /********************************** Includes **********************************/
 247 #ifdef CONFIG_AIC7XXX_REG_PRETTY_PRINT
 248 #define AIC_DEBUG_REGISTERS 1
 249 #else
 250 #define AIC_DEBUG_REGISTERS 0
 251 #endif
 252 #include "aic7xxx.h"
 253
 254 /***************************** Timer Facilities *******************************/
 255 #define ahc_timer_init init_timer
 256 #define ahc_timer_stop del_timer_sync
 257 typedef void ahc_linux_callback_t (u_long);
 258 static __inline void ahc_timer_reset(ahc_timer_t *timer, int usec,
 259                                      ahc_callback_t *func, void *arg);
 260 static __inline void ahc_scb_timer_reset(struct scb *scb, u_int usec);
 261
 262 static __inline void
 263 ahc_timer_reset(ahc_timer_t *timer, int usec, ahc_callback_t *func, void *arg)
 264 {
 265         struct ahc_softc *ahc;
 266
 267         ahc = (struct ahc_softc *)arg;
 268         del_timer(timer);
 269         timer->data = (u_long)arg;
 270         timer->expires = jiffies + (usec * HZ)/1000000;
 271         timer->function = (ahc_linux_callback_t*)func;
 272         add_timer(timer);
 273 }
 274
 275 static __inline void
 276 ahc_scb_timer_reset(struct scb *scb, u_int usec)
 277 {
 278         mod_timer(&scb->io_ctx->eh_timeout, jiffies + (usec * HZ)/1000000);
 279 }
 280
 281 /***************************** SMP support ************************************/
 282 #include <linux/spinlock.h>
 283
 284 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) || defined(SCSI_HAS_HOST_LOCK))
 285 #define AHC_SCSI_HAS_HOST_LOCK 1
 286 #else
 287 #define AHC_SCSI_HAS_HOST_LOCK 0
 288 #endif
 289
 290 #define AIC7XXX_DRIVER_VERSION "6.2.36"
 291
 292 /**************************** Front End Queues ********************************/
 293 /*
 294  * Data structure used to cast the Linux struct scsi_cmnd to something
 295  * that allows us to use the queue macros.  The linux structure has
 296  * plenty of space to hold the links fields as required by the queue
 297  * macros, but the queue macors require them to have the correct type.
 298  */
 299 struct ahc_cmd_internal {
 300         /* Area owned by the Linux scsi layer. */
 301         uint8_t private[offsetof(struct scsi_cmnd, SCp.Status)];
 302         union {
 303                 STAILQ_ENTRY(ahc_cmd)   ste;
 304                 LIST_ENTRY(ahc_cmd)     le;
 305                 TAILQ_ENTRY(ahc_cmd)    tqe;
 306         } links;
 307         uint32_t                        end;
 308 };
 309
 310 struct ahc_cmd {
 311         union {
 312                 struct ahc_cmd_internal icmd;
 313                 struct scsi_cmnd        scsi_cmd;
 314         } un;
 315 };
 316
 317 #define acmd_icmd(cmd) ((cmd)->un.icmd)
 318 #define acmd_scsi_cmd(cmd) ((cmd)->un.scsi_cmd)
 319 #define acmd_links un.icmd.links
 320
 321 /*************************** Device Data Structures ***************************/
 322 /*
 323  * A per probed device structure used to deal with some error recovery
 324  * scenarios that the Linux mid-layer code just doesn't know how to
 325  * handle.  The structure allocated for a device only becomes persistent
 326  * after a successfully completed inquiry command to the target when
 327  * that inquiry data indicates a lun is present.
 328  */
 329 TAILQ_HEAD(ahc_busyq, ahc_cmd);
 330 typedef enum {
 331         AHC_DEV_UNCONFIGURED     = 0x01,
 332         AHC_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */
 333         AHC_DEV_TIMER_ACTIVE     = 0x04, /* Our timer is active */
 334         AHC_DEV_ON_RUN_LIST      = 0x08, /* Queued to be run later */
 335         AHC_DEV_Q_BASIC          = 0x10, /* Allow basic device queuing */
 336         AHC_DEV_Q_TAGGED         = 0x20, /* Allow full SCSI2 command queueing */
 337         AHC_DEV_PERIODIC_OTAG    = 0x40, /* Send OTAG to prevent starvation */
 338         AHC_DEV_SLAVE_CONFIGURED = 0x80  /* slave_configure() has been called */
 339 } ahc_linux_dev_flags;
 340
 341 struct ahc_linux_target;
 342 struct ahc_linux_device {
 343         TAILQ_ENTRY(ahc_linux_device) links;
 344         struct          ahc_busyq busyq;
 345
 346         /*
 347          * The number of transactions currently
 348          * queued to the device.
 349          */
 350         int                     active;
 351
 352         /*
 353          * The currently allowed number of
 354          * transactions that can be queued to
 355          * the device.  Must be signed for
 356          * conversion from tagged to untagged
 357          * mode where the device may have more
 358          * than one outstanding active transaction.
 359          */
 360         int                     openings;
 361
 362         /*
 363          * A positive count indicates that this
 364          * device's queue is halted.
 365          */
 366         u_int                   qfrozen;
 367
 368         /*
 369          * Cumulative command counter.
 370          */
 371         u_long                  commands_issued;
 372
 373         /*
 374          * The number of tagged transactions when
 375          * running at our current opening level
 376          * that have been successfully received by
 377          * this device since the last QUEUE FULL.
 378          */
 379         u_int                   tag_success_count;
 380 #define AHC_TAG_SUCCESS_INTERVAL 50
 381
 382         ahc_linux_dev_flags     flags;
 383
 384         /*
 385          * Per device timer.
 386          */
 387         struct timer_list       timer;
 388
 389         /*
 390          * The high limit for the tags variable.
 391          */
 392         u_int                   maxtags;
 393
 394         /*
 395          * The computed number of tags outstanding
 396          * at the time of the last QUEUE FULL event.
 397          */
 398         u_int                   tags_on_last_queuefull;
 399
 400         /*
 401          * How many times we have seen a queue full
 402          * with the same number of tags.  This is used
 403          * to stop our adaptive queue depth algorithm
 404          * on devices with a fixed number of tags.
 405          */
 406         u_int                   last_queuefull_same_count;
 407 #define AHC_LOCK_TAGS_COUNT 50
 408
 409         /*
 410          * How many transactions have been queued
 411          * without the device going idle.  We use
 412          * this statistic to determine when to issue
 413          * an ordered tag to prevent transaction
 414          * starvation.  This statistic is only updated
 415          * if the AHC_DEV_PERIODIC_OTAG flag is set
 416          * on this device.
 417          */
 418         u_int                   commands_since_idle_or_otag;
 419 #define AHC_OTAG_THRESH 500
 420
 421         int                     lun;
 422         Scsi_Device            *scsi_device;
 423         struct                  ahc_linux_target *target;
 424 };
 425
 426 struct ahc_linux_target {
 427         struct ahc_linux_device  *devices[AHC_NUM_LUNS];
 428         int                       channel;
 429         int                       target;
 430         int                       refcount;
 431         struct ahc_transinfo      last_tinfo;
 432         struct ahc_softc         *ahc;
 433 };
 434
 435 /********************* Definitions Required by the Core ***********************/
 436 /*
 437  * Number of SG segments we require.  So long as the S/G segments for
 438  * a particular transaction are allocated in a physically contiguous
 439  * manner and are allocated below 4GB, the number of S/G segments is
 440  * unrestricted.
 441  */
 442 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
 443 /*
 444  * We dynamically adjust the number of segments in pre-2.5 kernels to
 445  * avoid fragmentation issues in the SCSI mid-layer's private memory
 446  * allocator.  See aic7xxx_osm.c ahc_linux_size_nseg() for details.
 447  */
 448 extern u_int ahc_linux_nseg;
 449 #define AHC_NSEG ahc_linux_nseg
 450 #define AHC_LINUX_MIN_NSEG 64
 451 #else
 452 #define AHC_NSEG 128
 453 #endif
 454
 455 /*
 456  * Per-SCB OSM storage.
 457  */
 458 typedef enum {
 459         AHC_UP_EH_SEMAPHORE = 0x1
 460 } ahc_linux_scb_flags;
 461
 462 struct scb_platform_data {
 463         struct ahc_linux_device *dev;
 464         dma_addr_t               buf_busaddr;
 465         uint32_t                 xfer_len;
 466         uint32_t                 sense_resid;   /* Auto-Sense residual */
 467         ahc_linux_scb_flags      flags;
 468 };
 469
 470 /*
 471  * Define a structure used for each host adapter.  All members are
 472  * aligned on a boundary >= the size of the member to honor the
 473  * alignment restrictions of the various platforms supported by
 474  * this driver.
 475  */
 476 typedef enum {
 477         AHC_RUN_CMPLT_Q_TIMER    = 0x10
 478 } ahc_linux_softc_flags;
 479
 480 TAILQ_HEAD(ahc_completeq, ahc_cmd);
 481
 482 struct ahc_platform_data {
 483         /*
 484          * Fields accessed from interrupt context.
 485          */
 486         struct ahc_linux_target *targets[AHC_NUM_TARGETS];
 487         TAILQ_HEAD(, ahc_linux_device) device_runq;
 488         struct ahc_completeq     completeq;
 489
 490         spinlock_t               spin_lock;
 491         struct tasklet_struct    runq_tasklet;
 492         u_int                    qfrozen;
 493         pid_t                    dv_pid;
 494         struct timer_list        completeq_timer;
 495         struct timer_list        reset_timer;
 496         struct semaphore         eh_sem;
 497         struct semaphore         dv_sem;
 498         struct semaphore         dv_cmd_sem;    /* XXX This needs to be in
 499                                                  * the target struct
 500                                                  */
 501         struct scsi_device      *dv_scsi_dev;
 502         struct Scsi_Host        *host;          /* pointer to scsi host */
 503 #define AHC_LINUX_NOIRQ ((uint32_t)~0)
 504         uint32_t                 irq;           /* IRQ for this adapter */
 505         uint32_t                 bios_address;
 506         uint32_t                 mem_busaddr;   /* Mem Base Addr */
 507         uint64_t                 hw_dma_mask;
 508         ahc_linux_softc_flags    flags;
 509 };
 510
 511 /************************** OS Utility Wrappers *******************************/
 512 #define printf printk
 513 #define M_NOWAIT GFP_ATOMIC
 514 #define M_WAITOK 0
 515 #define malloc(size, type, flags) kmalloc(size, flags)
 516 #define free(ptr, type) kfree(ptr)
 517
 518 static __inline void ahc_delay(long);
 519 static __inline void
 520 ahc_delay(long usec)
 521 {
 522         /*
 523          * udelay on Linux can have problems for
 524          * multi-millisecond waits.  Wait at most
 525          * 1024us per call.
 526          */
 527         while (usec > 0) {
 528                 udelay(usec % 1024);
 529                 usec -= 1024;
 530         }
 531 }
 532
 533
 534 /***************************** Low Level I/O **********************************/
 535 static __inline uint8_t ahc_inb(struct ahc_softc * ahc, long port);
 536 static __inline void ahc_outb(struct ahc_softc * ahc, long port, uint8_t val);
 537 static __inline void ahc_outsb(struct ahc_softc * ahc, long port,
 538                                uint8_t *, int count);
 539 static __inline void ahc_insb(struct ahc_softc * ahc, long port,
 540                                uint8_t *, int count);
 541
 542 static __inline uint8_t
 543 ahc_inb(struct ahc_softc * ahc, long port)
 544 {
 545         uint8_t x;
 546
 547         if (ahc->tag == BUS_SPACE_MEMIO) {
 548                 x = readb(ahc->bsh.maddr + port);
 549         } else {
 550                 x = inb(ahc->bsh.ioport + port);
 551         }
 552         mb();
 553         return (x);
 554 }
 555
 556 static __inline void
 557 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
 558 {
 559         if (ahc->tag == BUS_SPACE_MEMIO) {
 560                 writeb(val, ahc->bsh.maddr + port);
 561         } else {
 562                 outb(val, ahc->bsh.ioport + port);
 563         }
 564         mb();
 565 }
 566
 567 static __inline void
 568 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
 569 {
 570         int i;
 571
 572         /*
 573          * There is probably a more efficient way to do this on Linux
 574          * but we don't use this for anything speed critical and this
 575          * should work.
 576          */
 577         for (i = 0; i < count; i++)
 578                 ahc_outb(ahc, port, *array++);
 579 }
 580
 581 static __inline void
 582 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
 583 {
 584         int i;
 585
 586         /*
 587          * There is probably a more efficient way to do this on Linux
 588          * but we don't use this for anything speed critical and this
 589          * should work.
 590          */
 591         for (i = 0; i < count; i++)
 592                 *array++ = ahc_inb(ahc, port);
 593 }
 594
 595 /**************************** Initialization **********************************/
 596 int             ahc_linux_register_host(struct ahc_softc *,
 597                                         Scsi_Host_Template *);
 598
 599 uint64_t        ahc_linux_get_memsize(void);
 600
 601 /*************************** Pretty Printing **********************************/
 602 struct info_str {
 603         char *buffer;
 604         int length;
 605         off_t offset;
 606         int pos;
 607 };
 608
 609 void    ahc_format_transinfo(struct info_str *info,
 610                              struct ahc_transinfo *tinfo);
 611
 612 /******************************** Locking *************************************/
 613 /* Lock protecting internal data structures */
 614 static __inline void ahc_lockinit(struct ahc_softc *);
 615 static __inline void ahc_lock(struct ahc_softc *, unsigned long *flags);
 616 static __inline void ahc_unlock(struct ahc_softc *, unsigned long *flags);
 617
 618 /* Lock acquisition and release of the above lock in midlayer entry points. */
 619 static __inline void ahc_midlayer_entrypoint_lock(struct ahc_softc *,
 620                                                   unsigned long *flags);
 621 static __inline void ahc_midlayer_entrypoint_unlock(struct ahc_softc *,
 622                                                     unsigned long *flags);
 623
 624 /* Lock held during command compeletion to the upper layer */
 625 static __inline void ahc_done_lockinit(struct ahc_softc *);
 626 static __inline void ahc_done_lock(struct ahc_softc *, unsigned long *flags);
 627 static __inline void ahc_done_unlock(struct ahc_softc *, unsigned long *flags);
 628
 629 /* Lock held during ahc_list manipulation and ahc softc frees */
 630 extern spinlock_t ahc_list_spinlock;
 631 static __inline void ahc_list_lockinit(void);
 632 static __inline void ahc_list_lock(unsigned long *flags);
 633 static __inline void ahc_list_unlock(unsigned long *flags);
 634
 635 static __inline void
 636 ahc_lockinit(struct ahc_softc *ahc)
 637 {
 638         spin_lock_init(&ahc->platform_data->spin_lock);
 639 }
 640
 641 static __inline void
 642 ahc_lock(struct ahc_softc *ahc, unsigned long *flags)
 643 {
 644         spin_lock_irqsave(&ahc->platform_data->spin_lock, *flags);
 645 }
 646
 647 static __inline void
 648 ahc_unlock(struct ahc_softc *ahc, unsigned long *flags)
 649 {
 650         spin_unlock_irqrestore(&ahc->platform_data->spin_lock, *flags);
 651 }
 652
 653 static __inline void
 654 ahc_midlayer_entrypoint_lock(struct ahc_softc *ahc, unsigned long *flags)
 655 {
 656         /*
 657          * In 2.5.X and some 2.4.X versions, the midlayer takes our
 658          * lock just before calling us, so we avoid locking again.
 659          * For other kernel versions, the io_request_lock is taken
 660          * just before our entry point is called.  In this case, we
 661          * trade the io_request_lock for our per-softc lock.
 662          */
 663 #if AHC_SCSI_HAS_HOST_LOCK == 0
 664         spin_unlock(&io_request_lock);
 665         spin_lock(&ahc->platform_data->spin_lock);
 666 #endif
 667 }
 668
 669 static __inline void
 670 ahc_midlayer_entrypoint_unlock(struct ahc_softc *ahc, unsigned long *flags)
 671 {
 672 #if AHC_SCSI_HAS_HOST_LOCK == 0
 673         spin_unlock(&ahc->platform_data->spin_lock);
 674         spin_lock(&io_request_lock);
 675 #endif
 676 }
 677
 678 static __inline void
 679 ahc_done_lockinit(struct ahc_softc *ahc)
 680 {
 681         /*
 682          * In 2.5.X, our own lock is held during completions.
 683          * In previous versions, the io_request_lock is used.
 684          * In either case, we can't initialize this lock again.
 685          */
 686 }
 687
 688 static __inline void
 689 ahc_done_lock(struct ahc_softc *ahc, unsigned long *flags)
 690 {
 691 #if AHC_SCSI_HAS_HOST_LOCK == 0
 692         spin_lock_irqsave(&io_request_lock, *flags);
 693 #endif
 694 }
 695
 696 static __inline void
 697 ahc_done_unlock(struct ahc_softc *ahc, unsigned long *flags)
 698 {
 699 #if AHC_SCSI_HAS_HOST_LOCK == 0
 700         spin_unlock_irqrestore(&io_request_lock, *flags);
 701 #endif
 702 }
 703
 704 static __inline void
 705 ahc_list_lockinit(void)
 706 {
 707         spin_lock_init(&ahc_list_spinlock);
 708 }
 709
 710 static __inline void
 711 ahc_list_lock(unsigned long *flags)
 712 {
 713         spin_lock_irqsave(&ahc_list_spinlock, *flags);
 714 }
 715
 716 static __inline void
 717 ahc_list_unlock(unsigned long *flags)
 718 {
 719         spin_unlock_irqrestore(&ahc_list_spinlock, *flags);
 720 }
 721
 722 /******************************* PCI Definitions ******************************/
 723 /*
 724  * PCIM_xxx: mask to locate subfield in register
 725  * PCIR_xxx: config register offset
 726  * PCIC_xxx: device class
 727  * PCIS_xxx: device subclass
 728  * PCIP_xxx: device programming interface
 729  * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices)
 730  * PCID_xxx: device ID
 731  */
 732 #define PCIR_DEVVENDOR          0x00
 733 #define PCIR_VENDOR             0x00
 734 #define PCIR_DEVICE             0x02
 735 #define PCIR_COMMAND            0x04
 736 #define PCIM_CMD_PORTEN         0x0001
 737 #define PCIM_CMD_MEMEN          0x0002
 738 #define PCIM_CMD_BUSMASTEREN    0x0004
 739 #define PCIM_CMD_MWRICEN        0x0010
 740 #define PCIM_CMD_PERRESPEN      0x0040
 741 #define PCIM_CMD_SERRESPEN      0x0100
 742 #define PCIR_STATUS             0x06
 743 #define PCIR_REVID              0x08
 744 #define PCIR_PROGIF             0x09
 745 #define PCIR_SUBCLASS           0x0a
 746 #define PCIR_CLASS              0x0b
 747 #define PCIR_CACHELNSZ          0x0c
 748 #define PCIR_LATTIMER           0x0d
 749 #define PCIR_HEADERTYPE         0x0e
 750 #define PCIM_MFDEV              0x80
 751 #define PCIR_BIST               0x0f
 752 #define PCIR_CAP_PTR            0x34
 753
 754 /* config registers for header type 0 devices */
 755 #define PCIR_MAPS       0x10
 756 #define PCIR_SUBVEND_0  0x2c
 757 #define PCIR_SUBDEV_0   0x2e
 758
 759 extern struct pci_driver aic7xxx_pci_driver;
 760
 761 typedef enum
 762 {
 763         AHC_POWER_STATE_D0,
 764         AHC_POWER_STATE_D1,
 765         AHC_POWER_STATE_D2,
 766         AHC_POWER_STATE_D3
 767 } ahc_power_state;
 768
 769 /**************************** VL/EISA Routines ********************************/
 770 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) \
 771   && (defined(__i386__) || defined(__alpha__)) \
 772   && (!defined(CONFIG_EISA)))
 773 #define CONFIG_EISA
 774 #endif
 775
 776 #ifdef CONFIG_EISA
 777 extern uint32_t aic7xxx_probe_eisa_vl;
 778 int                      ahc_linux_eisa_init(void);
 779 void                     ahc_linux_eisa_exit(void);
 780 int                      aic7770_map_registers(struct ahc_softc *ahc,
 781                                                u_int port);
 782 int                      aic7770_map_int(struct ahc_softc *ahc, u_int irq);
 783 #else
 784 static inline int       ahc_linux_eisa_init(void) {
 785         return -ENODEV;
 786 }
 787 static inline void      ahc_linux_eisa_exit(void) {
 788 }
 789 #endif
 790
 791 /******************************* PCI Routines *********************************/
 792 #ifdef CONFIG_PCI
 793 int                      ahc_linux_pci_init(void);
 794 void                     ahc_linux_pci_exit(void);
 795 int                      ahc_pci_map_registers(struct ahc_softc *ahc);
 796 int                      ahc_pci_map_int(struct ahc_softc *ahc);
 797
 798 static __inline uint32_t ahc_pci_read_config(ahc_dev_softc_t pci,
 799                                              int reg, int width);
 800
 801 static __inline uint32_t
 802 ahc_pci_read_config(ahc_dev_softc_t pci, int reg, int width)
 803 {
 804         switch (width) {
 805         case 1:
 806         {
 807                 uint8_t retval;
 808
 809                 pci_read_config_byte(pci, reg, &retval);
 810                 return (retval);
 811         }
 812         case 2:
 813         {
 814                 uint16_t retval;
 815                 pci_read_config_word(pci, reg, &retval);
 816                 return (retval);
 817         }
 818         case 4:
 819         {
 820                 uint32_t retval;
 821                 pci_read_config_dword(pci, reg, &retval);
 822                 return (retval);
 823         }
 824         default:
 825                 panic("ahc_pci_read_config: Read size too big");
 826                 /* NOTREACHED */
 827                 return (0);
 828         }
 829 }
 830
 831 static __inline void ahc_pci_write_config(ahc_dev_softc_t pci,
 832                                           int reg, uint32_t value,
 833                                           int width);
 834
 835 static __inline void
 836 ahc_pci_write_config(ahc_dev_softc_t pci, int reg, uint32_t value, int width)
 837 {
 838         switch (width) {
 839         case 1:
 840                 pci_write_config_byte(pci, reg, value);
 841                 break;
 842         case 2:
 843                 pci_write_config_word(pci, reg, value);
 844                 break;
 845         case 4:
 846                 pci_write_config_dword(pci, reg, value);
 847                 break;
 848         default:
 849                 panic("ahc_pci_write_config: Write size too big");
 850                 /* NOTREACHED */
 851         }
 852 }
 853
 854 static __inline int ahc_get_pci_function(ahc_dev_softc_t);
 855 static __inline int
 856 ahc_get_pci_function(ahc_dev_softc_t pci)
 857 {
 858         return (PCI_FUNC(pci->devfn));
 859 }
 860
 861 static __inline int ahc_get_pci_slot(ahc_dev_softc_t);
 862 static __inline int
 863 ahc_get_pci_slot(ahc_dev_softc_t pci)
 864 {
 865         return (PCI_SLOT(pci->devfn));
 866 }
 867
 868 static __inline int ahc_get_pci_bus(ahc_dev_softc_t);
 869 static __inline int
 870 ahc_get_pci_bus(ahc_dev_softc_t pci)
 871 {
 872         return (pci->bus->number);
 873 }
 874 #else
 875 static inline int ahc_linux_pci_init(void) {
 876         return 0;
 877 }
 878 static inline void ahc_linux_pci_exit(void) {
 879 }
 880 #endif
 881
 882 static __inline void ahc_flush_device_writes(struct ahc_softc *);
 883 static __inline void
 884 ahc_flush_device_writes(struct ahc_softc *ahc)
 885 {
 886         /* XXX Is this sufficient for all architectures??? */
 887         ahc_inb(ahc, INTSTAT);
 888 }
 889
 890 /**************************** Proc FS Support *********************************/
 891 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
 892 int     ahc_linux_proc_info(char *, char **, off_t, int, int, int);
 893 #else
 894 int     ahc_linux_proc_info(struct Scsi_Host *, char *, char **,
 895                             off_t, int, int);
 896 #endif
 897
 898 /*************************** Domain Validation ********************************/
 899 /*********************** Transaction Access Wrappers *************************/
 900 static __inline void ahc_cmd_set_transaction_status(Scsi_Cmnd *, uint32_t);
 901 static __inline void ahc_set_transaction_status(struct scb *, uint32_t);
 902 static __inline void ahc_cmd_set_scsi_status(Scsi_Cmnd *, uint32_t);
 903 static __inline void ahc_set_scsi_status(struct scb *, uint32_t);
 904 static __inline uint32_t ahc_cmd_get_transaction_status(Scsi_Cmnd *cmd);
 905 static __inline uint32_t ahc_get_transaction_status(struct scb *);
 906 static __inline uint32_t ahc_cmd_get_scsi_status(Scsi_Cmnd *cmd);
 907 static __inline uint32_t ahc_get_scsi_status(struct scb *);
 908 static __inline void ahc_set_transaction_tag(struct scb *, int, u_int);
 909 static __inline u_long ahc_get_transfer_length(struct scb *);
 910 static __inline int ahc_get_transfer_dir(struct scb *);
 911 static __inline void ahc_set_residual(struct scb *, u_long);
 912 static __inline void ahc_set_sense_residual(struct scb *scb, u_long resid);
 913 static __inline u_long ahc_get_residual(struct scb *);
 914 static __inline u_long ahc_get_sense_residual(struct scb *);
 915 static __inline int ahc_perform_autosense(struct scb *);
 916 static __inline uint32_t ahc_get_sense_bufsize(struct ahc_softc *,
 917                                                struct scb *);
 918 static __inline void ahc_notify_xfer_settings_change(struct ahc_softc *,
 919                                                      struct ahc_devinfo *);
 920 static __inline void ahc_platform_scb_free(struct ahc_softc *ahc,
 921                                            struct scb *scb);
 922 static __inline void ahc_freeze_scb(struct scb *scb);
 923
 924 static __inline
 925 void ahc_cmd_set_transaction_status(Scsi_Cmnd *cmd, uint32_t status)
 926 {
 927         cmd->result &= ~(CAM_STATUS_MASK << 16);
 928         cmd->result |= status << 16;
 929 }
 930
 931 static __inline
 932 void ahc_set_transaction_status(struct scb *scb, uint32_t status)
 933 {
 934         ahc_cmd_set_transaction_status(scb->io_ctx,status);
 935 }
 936
 937 static __inline
 938 void ahc_cmd_set_scsi_status(Scsi_Cmnd *cmd, uint32_t status)
 939 {
 940         cmd->result &= ~0xFFFF;
 941         cmd->result |= status;
 942 }
 943
 944 static __inline
 945 void ahc_set_scsi_status(struct scb *scb, uint32_t status)
 946 {
 947         ahc_cmd_set_scsi_status(scb->io_ctx, status);
 948 }
 949
 950 static __inline
 951 uint32_t ahc_cmd_get_transaction_status(Scsi_Cmnd *cmd)
 952 {
 953         return ((cmd->result >> 16) & CAM_STATUS_MASK);
 954 }
 955
 956 static __inline
 957 uint32_t ahc_get_transaction_status(struct scb *scb)
 958 {
 959         return (ahc_cmd_get_transaction_status(scb->io_ctx));
 960 }
 961
 962 static __inline
 963 uint32_t ahc_cmd_get_scsi_status(Scsi_Cmnd *cmd)
 964 {
 965         return (cmd->result & 0xFFFF);
 966 }
 967
 968 static __inline
 969 uint32_t ahc_get_scsi_status(struct scb *scb)
 970 {
 971         return (ahc_cmd_get_scsi_status(scb->io_ctx));
 972 }
 973
 974 static __inline
 975 void ahc_set_transaction_tag(struct scb *scb, int enabled, u_int type)
 976 {
 977         /*
 978          * Nothing to do for linux as the incoming transaction
 979          * has no concept of tag/non tagged, etc.
 980          */
 981 }
 982
 983 static __inline
 984 u_long ahc_get_transfer_length(struct scb *scb)
 985 {
 986         return (scb->platform_data->xfer_len);
 987 }
 988
 989 static __inline
 990 int ahc_get_transfer_dir(struct scb *scb)
 991 {
 992         return (scb->io_ctx->sc_data_direction);
 993 }
 994
 995 static __inline
 996 void ahc_set_residual(struct scb *scb, u_long resid)
 997 {
 998         scb->io_ctx->resid = resid;
 999 }
1000
1001 static __inline
1002 void ahc_set_sense_residual(struct scb *scb, u_long resid)
1003 {
1004         scb->platform_data->sense_resid = resid;
1005 }
1006
1007 static __inline
1008 u_long ahc_get_residual(struct scb *scb)
1009 {
1010         return (scb->io_ctx->resid);
1011 }
1012
1013 static __inline
1014 u_long ahc_get_sense_residual(struct scb *scb)
1015 {
1016         return (scb->platform_data->sense_resid);
1017 }
1018
1019 static __inline
1020 int ahc_perform_autosense(struct scb *scb)
1021 {
1022         /*
1023          * We always perform autosense in Linux.
1024          * On other platforms this is set on a
1025          * per-transaction basis.
1026          */
1027         return (1);
1028 }
1029
1030 static __inline uint32_t
1031 ahc_get_sense_bufsize(struct ahc_softc *ahc, struct scb *scb)
1032 {
1033         return (sizeof(struct scsi_sense_data));
1034 }
1035
1036 static __inline void
1037 ahc_notify_xfer_settings_change(struct ahc_softc *ahc,
1038                                 struct ahc_devinfo *devinfo)
1039 {
1040         /* Nothing to do here for linux */
1041 }
1042
1043 static __inline void
1044 ahc_platform_scb_free(struct ahc_softc *ahc, struct scb *scb)
1045 {
1046         ahc->flags &= ~AHC_RESOURCE_SHORTAGE;
1047 }
1048
1049 int     ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg);
1050 void    ahc_platform_free(struct ahc_softc *ahc);
1051 void    ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb);
1052
1053 static __inline void
1054 ahc_freeze_scb(struct scb *scb)
1055 {
1056         if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) {
1057                 scb->io_ctx->result |= CAM_DEV_QFRZN << 16;
1058                 scb->platform_data->dev->qfrozen++;
1059         }
1060 }
1061
1062 void    ahc_platform_set_tags(struct ahc_softc *ahc,
1063                               struct ahc_devinfo *devinfo, ahc_queue_alg);
1064 int     ahc_platform_abort_scbs(struct ahc_softc *ahc, int target,
1065                                 char channel, int lun, u_int tag,
1066                                 role_t role, uint32_t status);
1067 irqreturn_t
1068         ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs);
1069 void    ahc_platform_flushwork(struct ahc_softc *ahc);
1070 int     ahc_softc_comp(struct ahc_softc *, struct ahc_softc *);
1071 void    ahc_done(struct ahc_softc*, struct scb*);
1072 void    ahc_send_async(struct ahc_softc *, char channel,
1073                        u_int target, u_int lun, ac_code, void *);
1074 void    ahc_print_path(struct ahc_softc *, struct scb *);
1075 void    ahc_platform_dump_card_state(struct ahc_softc *ahc);
1076
1077 #ifdef CONFIG_PCI
1078 #define AHC_PCI_CONFIG 1
1079 #else
1080 #define AHC_PCI_CONFIG 0
1081 #endif
1082 #define bootverbose aic7xxx_verbose
1083 extern u_int aic7xxx_verbose;
1084 #endif /* _AIC7XXX_LINUX_H_ */