git.oblomov.eu Git - linux-2.6/blob - drivers/scsi/aic7xxx/aic79xx_osm.c

   1 /*
   2  * Adaptec AIC79xx device driver for Linux.
   3  *
   4  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
   5  *
   6  * --------------------------------------------------------------------------
   7  * Copyright (c) 1994-2000 Justin T. Gibbs.
   8  * Copyright (c) 1997-1999 Doug Ledford
   9  * Copyright (c) 2000-2003 Adaptec Inc.
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions, and the following disclaimer,
  17  *    without modification.
  18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19  *    substantially similar to the "NO WARRANTY" disclaimer below
  20  *    ("Disclaimer") and any redistribution must be conditioned upon
  21  *    including a substantially similar Disclaimer requirement for further
  22  *    binary redistribution.
  23  * 3. Neither the names of the above-listed copyright holders nor the names
  24  *    of any contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * Alternatively, this software may be distributed under the terms of the
  28  * GNU General Public License ("GPL") version 2 as published by the Free
  29  * Software Foundation.
  30  *
  31  * NO WARRANTY
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGES.
  43  */
  44
  45 #include "aic79xx_osm.h"
  46 #include "aic79xx_inline.h"
  47 #include <scsi/scsicam.h>
  48
  49 static struct scsi_transport_template *ahd_linux_transport_template = NULL;
  50
  51 #include <linux/init.h>         /* __setup */
  52 #include <linux/mm.h>           /* For fetching system memory size */
  53 #include <linux/blkdev.h>               /* For block_size() */
  54 #include <linux/delay.h>        /* For ssleep/msleep */
  55 #include <linux/device.h>
  56
  57 /*
  58  * Bucket size for counting good commands in between bad ones.
  59  */
  60 #define AHD_LINUX_ERR_THRESH    1000
  61
  62 /*
  63  * Set this to the delay in seconds after SCSI bus reset.
  64  * Note, we honor this only for the initial bus reset.
  65  * The scsi error recovery code performs its own bus settle
  66  * delay handling for error recovery actions.
  67  */
  68 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
  69 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
  70 #else
  71 #define AIC79XX_RESET_DELAY 5000
  72 #endif
  73
  74 /*
  75  * To change the default number of tagged transactions allowed per-device,
  76  * add a line to the lilo.conf file like:
  77  * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
  78  * which will result in the first four devices on the first two
  79  * controllers being set to a tagged queue depth of 32.
  80  *
  81  * The tag_commands is an array of 16 to allow for wide and twin adapters.
  82  * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
  83  * for channel 1.
  84  */
  85 typedef struct {
  86         uint16_t tag_commands[16];      /* Allow for wide/twin adapters. */
  87 } adapter_tag_info_t;
  88
  89 /*
  90  * Modify this as you see fit for your system.
  91  *
  92  * 0                    tagged queuing disabled
  93  * 1 <= n <= 253        n == max tags ever dispatched.
  94  *
  95  * The driver will throttle the number of commands dispatched to a
  96  * device if it returns queue full.  For devices with a fixed maximum
  97  * queue depth, the driver will eventually determine this depth and
  98  * lock it in (a console message is printed to indicate that a lock
  99  * has occurred).  On some devices, queue full is returned for a temporary
 100  * resource shortage.  These devices will return queue full at varying
 101  * depths.  The driver will throttle back when the queue fulls occur and
 102  * attempt to slowly increase the depth over time as the device recovers
 103  * from the resource shortage.
 104  *
 105  * In this example, the first line will disable tagged queueing for all
 106  * the devices on the first probed aic79xx adapter.
 107  *
 108  * The second line enables tagged queueing with 4 commands/LUN for IDs
 109  * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
 110  * driver to attempt to use up to 64 tags for ID 1.
 111  *
 112  * The third line is the same as the first line.
 113  *
 114  * The fourth line disables tagged queueing for devices 0 and 3.  It
 115  * enables tagged queueing for the other IDs, with 16 commands/LUN
 116  * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
 117  * IDs 2, 5-7, and 9-15.
 118  */
 119
 120 /*
 121  * NOTE: The below structure is for reference only, the actual structure
 122  *       to modify in order to change things is just below this comment block.
 123 adapter_tag_info_t aic79xx_tag_info[] =
 124 {
 125         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 126         {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
 127         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 128         {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
 129 };
 130 */
 131
 132 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
 133 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
 134 #else
 135 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
 136 #endif
 137
 138 #define AIC79XX_CONFIGED_TAG_COMMANDS {                                 \
 139         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 140         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 141         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 142         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 143         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 144         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 145         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 146         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE                \
 147 }
 148
 149 /*
 150  * By default, use the number of commands specified by
 151  * the users kernel configuration.
 152  */
 153 static adapter_tag_info_t aic79xx_tag_info[] =
 154 {
 155         {AIC79XX_CONFIGED_TAG_COMMANDS},
 156         {AIC79XX_CONFIGED_TAG_COMMANDS},
 157         {AIC79XX_CONFIGED_TAG_COMMANDS},
 158         {AIC79XX_CONFIGED_TAG_COMMANDS},
 159         {AIC79XX_CONFIGED_TAG_COMMANDS},
 160         {AIC79XX_CONFIGED_TAG_COMMANDS},
 161         {AIC79XX_CONFIGED_TAG_COMMANDS},
 162         {AIC79XX_CONFIGED_TAG_COMMANDS},
 163         {AIC79XX_CONFIGED_TAG_COMMANDS},
 164         {AIC79XX_CONFIGED_TAG_COMMANDS},
 165         {AIC79XX_CONFIGED_TAG_COMMANDS},
 166         {AIC79XX_CONFIGED_TAG_COMMANDS},
 167         {AIC79XX_CONFIGED_TAG_COMMANDS},
 168         {AIC79XX_CONFIGED_TAG_COMMANDS},
 169         {AIC79XX_CONFIGED_TAG_COMMANDS},
 170         {AIC79XX_CONFIGED_TAG_COMMANDS}
 171 };
 172
 173 /*
 174  * The I/O cell on the chip is very configurable in respect to its analog
 175  * characteristics.  Set the defaults here; they can be overriden with
 176  * the proper insmod parameters.
 177  */
 178 struct ahd_linux_iocell_opts
 179 {
 180         uint8_t precomp;
 181         uint8_t slewrate;
 182         uint8_t amplitude;
 183 };
 184 #define AIC79XX_DEFAULT_PRECOMP         0xFF
 185 #define AIC79XX_DEFAULT_SLEWRATE        0xFF
 186 #define AIC79XX_DEFAULT_AMPLITUDE       0xFF
 187 #define AIC79XX_DEFAULT_IOOPTS                  \
 188 {                                               \
 189         AIC79XX_DEFAULT_PRECOMP,                \
 190         AIC79XX_DEFAULT_SLEWRATE,               \
 191         AIC79XX_DEFAULT_AMPLITUDE               \
 192 }
 193 #define AIC79XX_PRECOMP_INDEX   0
 194 #define AIC79XX_SLEWRATE_INDEX  1
 195 #define AIC79XX_AMPLITUDE_INDEX 2
 196 static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
 197 {
 198         AIC79XX_DEFAULT_IOOPTS,
 199         AIC79XX_DEFAULT_IOOPTS,
 200         AIC79XX_DEFAULT_IOOPTS,
 201         AIC79XX_DEFAULT_IOOPTS,
 202         AIC79XX_DEFAULT_IOOPTS,
 203         AIC79XX_DEFAULT_IOOPTS,
 204         AIC79XX_DEFAULT_IOOPTS,
 205         AIC79XX_DEFAULT_IOOPTS,
 206         AIC79XX_DEFAULT_IOOPTS,
 207         AIC79XX_DEFAULT_IOOPTS,
 208         AIC79XX_DEFAULT_IOOPTS,
 209         AIC79XX_DEFAULT_IOOPTS,
 210         AIC79XX_DEFAULT_IOOPTS,
 211         AIC79XX_DEFAULT_IOOPTS,
 212         AIC79XX_DEFAULT_IOOPTS,
 213         AIC79XX_DEFAULT_IOOPTS
 214 };
 215
 216 /*
 217  * There should be a specific return value for this in scsi.h, but
 218  * it seems that most drivers ignore it.
 219  */
 220 #define DID_UNDERFLOW   DID_ERROR
 221
 222 void
 223 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
 224 {
 225         printk("(scsi%d:%c:%d:%d): ",
 226                ahd->platform_data->host->host_no,
 227                scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
 228                scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
 229                scb != NULL ? SCB_GET_LUN(scb) : -1);
 230 }
 231
 232 /*
 233  * XXX - these options apply unilaterally to _all_ adapters
 234  *       cards in the system.  This should be fixed.  Exceptions to this
 235  *       rule are noted in the comments.
 236  */
 237
 238 /*
 239  * Skip the scsi bus reset.  Non 0 make us skip the reset at startup.  This
 240  * has no effect on any later resets that might occur due to things like
 241  * SCSI bus timeouts.
 242  */
 243 static uint32_t aic79xx_no_reset;
 244
 245 /*
 246  * Should we force EXTENDED translation on a controller.
 247  *     0 == Use whatever is in the SEEPROM or default to off
 248  *     1 == Use whatever is in the SEEPROM or default to on
 249  */
 250 static uint32_t aic79xx_extended;
 251
 252 /*
 253  * PCI bus parity checking of the Adaptec controllers.  This is somewhat
 254  * dubious at best.  To my knowledge, this option has never actually
 255  * solved a PCI parity problem, but on certain machines with broken PCI
 256  * chipset configurations, it can generate tons of false error messages.
 257  * It's included in the driver for completeness.
 258  *   0     = Shut off PCI parity check
 259  *   non-0 = Enable PCI parity check
 260  *
 261  * NOTE: you can't actually pass -1 on the lilo prompt.  So, to set this
 262  * variable to -1 you would actually want to simply pass the variable
 263  * name without a number.  That will invert the 0 which will result in
 264  * -1.
 265  */
 266 static uint32_t aic79xx_pci_parity = ~0;
 267
 268 /*
 269  * There are lots of broken chipsets in the world.  Some of them will
 270  * violate the PCI spec when we issue byte sized memory writes to our
 271  * controller.  I/O mapped register access, if allowed by the given
 272  * platform, will work in almost all cases.
 273  */
 274 uint32_t aic79xx_allow_memio = ~0;
 275
 276 /*
 277  * So that we can set how long each device is given as a selection timeout.
 278  * The table of values goes like this:
 279  *   0 - 256ms
 280  *   1 - 128ms
 281  *   2 - 64ms
 282  *   3 - 32ms
 283  * We default to 256ms because some older devices need a longer time
 284  * to respond to initial selection.
 285  */
 286 static uint32_t aic79xx_seltime;
 287
 288 /*
 289  * Certain devices do not perform any aging on commands.  Should the
 290  * device be saturated by commands in one portion of the disk, it is
 291  * possible for transactions on far away sectors to never be serviced.
 292  * To handle these devices, we can periodically send an ordered tag to
 293  * force all outstanding transactions to be serviced prior to a new
 294  * transaction.
 295  */
 296 static uint32_t aic79xx_periodic_otag;
 297
 298 /* Some storage boxes are using an LSI chip which has a bug making it
 299  * impossible to use aic79xx Rev B chip in 320 speeds.  The following
 300  * storage boxes have been reported to be buggy:
 301  * EonStor 3U 16-Bay: U16U-G3A3
 302  * EonStor 2U 12-Bay: U12U-G3A3
 303  * SentinelRAID: 2500F R5 / R6
 304  * SentinelRAID: 2500F R1
 305  * SentinelRAID: 2500F/1500F
 306  * SentinelRAID: 150F
 307  *
 308  * To get around this LSI bug, you can set your board to 160 mode
 309  * or you can enable the SLOWCRC bit.
 310  */
 311 uint32_t aic79xx_slowcrc;
 312
 313 /*
 314  * Module information and settable options.
 315  */
 316 static char *aic79xx = NULL;
 317
 318 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
 319 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
 320 MODULE_LICENSE("Dual BSD/GPL");
 321 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
 322 module_param(aic79xx, charp, 0444);
 323 MODULE_PARM_DESC(aic79xx,
 324 "period-delimited options string:\n"
 325 "       verbose                 Enable verbose/diagnostic logging\n"
 326 "       allow_memio             Allow device registers to be memory mapped\n"
 327 "       debug                   Bitmask of debug values to enable\n"
 328 "       no_reset                Suppress initial bus resets\n"
 329 "       extended                Enable extended geometry on all controllers\n"
 330 "       periodic_otag           Send an ordered tagged transaction\n"
 331 "                               periodically to prevent tag starvation.\n"
 332 "                               This may be required by some older disk\n"
 333 "                               or drives/RAID arrays.\n"
 334 "       tag_info:<tag_str>      Set per-target tag depth\n"
 335 "       global_tag_depth:<int>  Global tag depth for all targets on all buses\n"
 336 "       slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
 337 "       precomp:<pcomp_list>    Set the signal precompensation (0-7).\n"
 338 "       amplitude:<int>         Set the signal amplitude (0-7).\n"
 339 "       seltime:<int>           Selection Timeout:\n"
 340 "                               (0/256ms,1/128ms,2/64ms,3/32ms)\n"
 341 "       slowcrc                 Turn on the SLOWCRC bit (Rev B only)\n"
 342 "\n"
 343 "       Sample /etc/modprobe.conf line:\n"
 344 "               Enable verbose logging\n"
 345 "               Set tag depth on Controller 2/Target 2 to 10 tags\n"
 346 "               Shorten the selection timeout to 128ms\n"
 347 "\n"
 348 "       options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
 349 );
 350
 351 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
 352                                          struct scsi_device *,
 353                                          struct scb *);
 354 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
 355                                          struct scsi_cmnd *cmd);
 356 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
 357 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
 358 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
 359                                      struct ahd_devinfo *devinfo);
 360 static void ahd_linux_device_queue_depth(struct scsi_device *);
 361 static int ahd_linux_run_command(struct ahd_softc*,
 362                                  struct ahd_linux_device *,
 363                                  struct scsi_cmnd *);
 364 static void ahd_linux_setup_tag_info_global(char *p);
 365 static int  aic79xx_setup(char *c);
 366 static void ahd_freeze_simq(struct ahd_softc *ahd);
 367 static void ahd_release_simq(struct ahd_softc *ahd);
 368
 369 static int ahd_linux_unit;
 370
 371
 372 /************************** OS Utility Wrappers *******************************/
 373 void ahd_delay(long);
 374 void
 375 ahd_delay(long usec)
 376 {
 377         /*
 378          * udelay on Linux can have problems for
 379          * multi-millisecond waits.  Wait at most
 380          * 1024us per call.
 381          */
 382         while (usec > 0) {
 383                 udelay(usec % 1024);
 384                 usec -= 1024;
 385         }
 386 }
 387
 388
 389 /***************************** Low Level I/O **********************************/
 390 uint8_t ahd_inb(struct ahd_softc * ahd, long port);
 391 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
 392 void ahd_outw_atomic(struct ahd_softc * ahd,
 393                                      long port, uint16_t val);
 394 void ahd_outsb(struct ahd_softc * ahd, long port,
 395                                uint8_t *, int count);
 396 void ahd_insb(struct ahd_softc * ahd, long port,
 397                                uint8_t *, int count);
 398
 399 uint8_t
 400 ahd_inb(struct ahd_softc * ahd, long port)
 401 {
 402         uint8_t x;
 403
 404         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 405                 x = readb(ahd->bshs[0].maddr + port);
 406         } else {
 407                 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
 408         }
 409         mb();
 410         return (x);
 411 }
 412
 413 #if 0 /* unused */
 414 static uint16_t
 415 ahd_inw_atomic(struct ahd_softc * ahd, long port)
 416 {
 417         uint8_t x;
 418
 419         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 420                 x = readw(ahd->bshs[0].maddr + port);
 421         } else {
 422                 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
 423         }
 424         mb();
 425         return (x);
 426 }
 427 #endif
 428
 429 void
 430 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
 431 {
 432         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 433                 writeb(val, ahd->bshs[0].maddr + port);
 434         } else {
 435                 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
 436         }
 437         mb();
 438 }
 439
 440 void
 441 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
 442 {
 443         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 444                 writew(val, ahd->bshs[0].maddr + port);
 445         } else {
 446                 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
 447         }
 448         mb();
 449 }
 450
 451 void
 452 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
 453 {
 454         int i;
 455
 456         /*
 457          * There is probably a more efficient way to do this on Linux
 458          * but we don't use this for anything speed critical and this
 459          * should work.
 460          */
 461         for (i = 0; i < count; i++)
 462                 ahd_outb(ahd, port, *array++);
 463 }
 464
 465 void
 466 ahd_insb(struct ahd_softc * ahd, 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                 *array++ = ahd_inb(ahd, port);
 477 }
 478
 479 /******************************* PCI Routines *********************************/
 480 uint32_t
 481 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
 482 {
 483         switch (width) {
 484         case 1:
 485         {
 486                 uint8_t retval;
 487
 488                 pci_read_config_byte(pci, reg, &retval);
 489                 return (retval);
 490         }
 491         case 2:
 492         {
 493                 uint16_t retval;
 494                 pci_read_config_word(pci, reg, &retval);
 495                 return (retval);
 496         }
 497         case 4:
 498         {
 499                 uint32_t retval;
 500                 pci_read_config_dword(pci, reg, &retval);
 501                 return (retval);
 502         }
 503         default:
 504                 panic("ahd_pci_read_config: Read size too big");
 505                 /* NOTREACHED */
 506                 return (0);
 507         }
 508 }
 509
 510 void
 511 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
 512 {
 513         switch (width) {
 514         case 1:
 515                 pci_write_config_byte(pci, reg, value);
 516                 break;
 517         case 2:
 518                 pci_write_config_word(pci, reg, value);
 519                 break;
 520         case 4:
 521                 pci_write_config_dword(pci, reg, value);
 522                 break;
 523         default:
 524                 panic("ahd_pci_write_config: Write size too big");
 525                 /* NOTREACHED */
 526         }
 527 }
 528
 529 /****************************** Inlines ***************************************/
 530 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
 531
 532 static void
 533 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
 534 {
 535         struct scsi_cmnd *cmd;
 536
 537         cmd = scb->io_ctx;
 538         ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
 539         scsi_dma_unmap(cmd);
 540 }
 541
 542 /******************************** Macros **************************************/
 543 #define BUILD_SCSIID(ahd, cmd)                                          \
 544         (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
 545
 546 /*
 547  * Return a string describing the driver.
 548  */
 549 static const char *
 550 ahd_linux_info(struct Scsi_Host *host)
 551 {
 552         static char buffer[512];
 553         char    ahd_info[256];
 554         char   *bp;
 555         struct ahd_softc *ahd;
 556
 557         bp = &buffer[0];
 558         ahd = *(struct ahd_softc **)host->hostdata;
 559         memset(bp, 0, sizeof(buffer));
 560         strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
 561                         "        <");
 562         strcat(bp, ahd->description);
 563         strcat(bp, ">\n"
 564                         "        ");
 565         ahd_controller_info(ahd, ahd_info);
 566         strcat(bp, ahd_info);
 567
 568         return (bp);
 569 }
 570
 571 /*
 572  * Queue an SCB to the controller.
 573  */
 574 static int
 575 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 576 {
 577         struct   ahd_softc *ahd;
 578         struct   ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
 579         int rtn = SCSI_MLQUEUE_HOST_BUSY;
 580
 581         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 582
 583         cmd->scsi_done = scsi_done;
 584         cmd->result = CAM_REQ_INPROG << 16;
 585         rtn = ahd_linux_run_command(ahd, dev, cmd);
 586
 587         return rtn;
 588 }
 589
 590 static struct scsi_target **
 591 ahd_linux_target_in_softc(struct scsi_target *starget)
 592 {
 593         struct  ahd_softc *ahd =
 594                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 595         unsigned int target_offset;
 596
 597         target_offset = starget->id;
 598         if (starget->channel != 0)
 599                 target_offset += 8;
 600
 601         return &ahd->platform_data->starget[target_offset];
 602 }
 603
 604 static int
 605 ahd_linux_target_alloc(struct scsi_target *starget)
 606 {
 607         struct  ahd_softc *ahd =
 608                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 609         struct seeprom_config *sc = ahd->seep_config;
 610         unsigned long flags;
 611         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 612         struct ahd_devinfo devinfo;
 613         struct ahd_initiator_tinfo *tinfo;
 614         struct ahd_tmode_tstate *tstate;
 615         char channel = starget->channel + 'A';
 616
 617         ahd_lock(ahd, &flags);
 618
 619         BUG_ON(*ahd_targp != NULL);
 620
 621         *ahd_targp = starget;
 622
 623         if (sc) {
 624                 int flags = sc->device_flags[starget->id];
 625
 626                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 627                                             starget->id, &tstate);
 628
 629                 if ((flags  & CFPACKETIZED) == 0) {
 630                         /* Do not negotiate packetized transfers */
 631                         spi_rd_strm(starget) = 0;
 632                         spi_pcomp_en(starget) = 0;
 633                         spi_rti(starget) = 0;
 634                         spi_wr_flow(starget) = 0;
 635                         spi_hold_mcs(starget) = 0;
 636                 } else {
 637                         if ((ahd->features & AHD_RTI) == 0)
 638                                 spi_rti(starget) = 0;
 639                 }
 640
 641                 if ((flags & CFQAS) == 0)
 642                         spi_qas(starget) = 0;
 643
 644                 /* Transinfo values have been set to BIOS settings */
 645                 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
 646                 spi_min_period(starget) = tinfo->user.period;
 647                 spi_max_offset(starget) = tinfo->user.offset;
 648         }
 649
 650         tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
 651                                     starget->id, &tstate);
 652         ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
 653                             CAM_LUN_WILDCARD, channel,
 654                             ROLE_INITIATOR);
 655         ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
 656                          AHD_TRANS_GOAL, /*paused*/FALSE);
 657         ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
 658                       AHD_TRANS_GOAL, /*paused*/FALSE);
 659         ahd_unlock(ahd, &flags);
 660
 661         return 0;
 662 }
 663
 664 static void
 665 ahd_linux_target_destroy(struct scsi_target *starget)
 666 {
 667         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 668
 669         *ahd_targp = NULL;
 670 }
 671
 672 static int
 673 ahd_linux_slave_alloc(struct scsi_device *sdev)
 674 {
 675         struct  ahd_softc *ahd =
 676                 *((struct ahd_softc **)sdev->host->hostdata);
 677         struct ahd_linux_device *dev;
 678
 679         if (bootverbose)
 680                 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
 681
 682         dev = scsi_transport_device_data(sdev);
 683         memset(dev, 0, sizeof(*dev));
 684
 685         /*
 686          * We start out life using untagged
 687          * transactions of which we allow one.
 688          */
 689         dev->openings = 1;
 690
 691         /*
 692          * Set maxtags to 0.  This will be changed if we
 693          * later determine that we are dealing with
 694          * a tagged queuing capable device.
 695          */
 696         dev->maxtags = 0;
 697
 698         return (0);
 699 }
 700
 701 static int
 702 ahd_linux_slave_configure(struct scsi_device *sdev)
 703 {
 704         struct  ahd_softc *ahd;
 705
 706         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 707         if (bootverbose)
 708                 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
 709
 710         ahd_linux_device_queue_depth(sdev);
 711
 712         /* Initial Domain Validation */
 713         if (!spi_initial_dv(sdev->sdev_target))
 714                 spi_dv_device(sdev);
 715
 716         return 0;
 717 }
 718
 719 #if defined(__i386__)
 720 /*
 721  * Return the disk geometry for the given SCSI device.
 722  */
 723 static int
 724 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 725                     sector_t capacity, int geom[])
 726 {
 727         uint8_t *bh;
 728         int      heads;
 729         int      sectors;
 730         int      cylinders;
 731         int      ret;
 732         int      extended;
 733         struct   ahd_softc *ahd;
 734
 735         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 736
 737         bh = scsi_bios_ptable(bdev);
 738         if (bh) {
 739                 ret = scsi_partsize(bh, capacity,
 740                                     &geom[2], &geom[0], &geom[1]);
 741                 kfree(bh);
 742                 if (ret != -1)
 743                         return (ret);
 744         }
 745         heads = 64;
 746         sectors = 32;
 747         cylinders = aic_sector_div(capacity, heads, sectors);
 748
 749         if (aic79xx_extended != 0)
 750                 extended = 1;
 751         else
 752                 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
 753         if (extended && cylinders >= 1024) {
 754                 heads = 255;
 755                 sectors = 63;
 756                 cylinders = aic_sector_div(capacity, heads, sectors);
 757         }
 758         geom[0] = heads;
 759         geom[1] = sectors;
 760         geom[2] = cylinders;
 761         return (0);
 762 }
 763 #endif
 764
 765 /*
 766  * Abort the current SCSI command(s).
 767  */
 768 static int
 769 ahd_linux_abort(struct scsi_cmnd *cmd)
 770 {
 771         int error;
 772
 773         error = ahd_linux_queue_abort_cmd(cmd);
 774
 775         return error;
 776 }
 777
 778 /*
 779  * Attempt to send a target reset message to the device that timed out.
 780  */
 781 static int
 782 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
 783 {
 784         struct ahd_softc *ahd;
 785         struct ahd_linux_device *dev;
 786         struct scb *reset_scb;
 787         u_int  cdb_byte;
 788         int    retval = SUCCESS;
 789         int    paused;
 790         int    wait;
 791         struct  ahd_initiator_tinfo *tinfo;
 792         struct  ahd_tmode_tstate *tstate;
 793         unsigned long flags;
 794         DECLARE_COMPLETION_ONSTACK(done);
 795
 796         reset_scb = NULL;
 797         paused = FALSE;
 798         wait = FALSE;
 799         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 800
 801         scmd_printk(KERN_INFO, cmd,
 802                     "Attempting to queue a TARGET RESET message:");
 803
 804         printf("CDB:");
 805         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
 806                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
 807         printf("\n");
 808
 809         /*
 810          * Determine if we currently own this command.
 811          */
 812         dev = scsi_transport_device_data(cmd->device);
 813
 814         if (dev == NULL) {
 815                 /*
 816                  * No target device for this command exists,
 817                  * so we must not still own the command.
 818                  */
 819                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
 820                 return SUCCESS;
 821         }
 822
 823         /*
 824          * Generate us a new SCB
 825          */
 826         reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
 827         if (!reset_scb) {
 828                 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
 829                 return FAILED;
 830         }
 831
 832         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 833                                     cmd->device->id, &tstate);
 834         reset_scb->io_ctx = cmd;
 835         reset_scb->platform_data->dev = dev;
 836         reset_scb->sg_count = 0;
 837         ahd_set_residual(reset_scb, 0);
 838         ahd_set_sense_residual(reset_scb, 0);
 839         reset_scb->platform_data->xfer_len = 0;
 840         reset_scb->hscb->control = 0;
 841         reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
 842         reset_scb->hscb->lun = cmd->device->lun;
 843         reset_scb->hscb->cdb_len = 0;
 844         reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
 845         reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
 846         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 847                 reset_scb->flags |= SCB_PACKETIZED;
 848         } else {
 849                 reset_scb->hscb->control |= MK_MESSAGE;
 850         }
 851         dev->openings--;
 852         dev->active++;
 853         dev->commands_issued++;
 854
 855         ahd_lock(ahd, &flags);
 856
 857         LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
 858         ahd_queue_scb(ahd, reset_scb);
 859
 860         ahd->platform_data->eh_done = &done;
 861         ahd_unlock(ahd, &flags);
 862
 863         printf("%s: Device reset code sleeping\n", ahd_name(ahd));
 864         if (!wait_for_completion_timeout(&done, 5 * HZ)) {
 865                 ahd_lock(ahd, &flags);
 866                 ahd->platform_data->eh_done = NULL;
 867                 ahd_unlock(ahd, &flags);
 868                 printf("%s: Device reset timer expired (active %d)\n",
 869                        ahd_name(ahd), dev->active);
 870                 retval = FAILED;
 871         }
 872         printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
 873
 874         return (retval);
 875 }
 876
 877 /*
 878  * Reset the SCSI bus.
 879  */
 880 static int
 881 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 882 {
 883         struct ahd_softc *ahd;
 884         int    found;
 885         unsigned long flags;
 886
 887         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 888 #ifdef AHD_DEBUG
 889         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 890                 printf("%s: Bus reset called for cmd %p\n",
 891                        ahd_name(ahd), cmd);
 892 #endif
 893         ahd_lock(ahd, &flags);
 894
 895         found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 896                                   /*initiate reset*/TRUE);
 897         ahd_unlock(ahd, &flags);
 898
 899         if (bootverbose)
 900                 printf("%s: SCSI bus reset delivered. "
 901                        "%d SCBs aborted.\n", ahd_name(ahd), found);
 902
 903         return (SUCCESS);
 904 }
 905
 906 struct scsi_host_template aic79xx_driver_template = {
 907         .module                 = THIS_MODULE,
 908         .name                   = "aic79xx",
 909         .proc_name              = "aic79xx",
 910         .proc_info              = ahd_linux_proc_info,
 911         .info                   = ahd_linux_info,
 912         .queuecommand           = ahd_linux_queue,
 913         .eh_abort_handler       = ahd_linux_abort,
 914         .eh_device_reset_handler = ahd_linux_dev_reset,
 915         .eh_bus_reset_handler   = ahd_linux_bus_reset,
 916 #if defined(__i386__)
 917         .bios_param             = ahd_linux_biosparam,
 918 #endif
 919         .can_queue              = AHD_MAX_QUEUE,
 920         .this_id                = -1,
 921         .max_sectors            = 8192,
 922         .cmd_per_lun            = 2,
 923         .use_clustering         = ENABLE_CLUSTERING,
 924         .slave_alloc            = ahd_linux_slave_alloc,
 925         .slave_configure        = ahd_linux_slave_configure,
 926         .target_alloc           = ahd_linux_target_alloc,
 927         .target_destroy         = ahd_linux_target_destroy,
 928 };
 929
 930 /******************************** Bus DMA *************************************/
 931 int
 932 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
 933                    bus_size_t alignment, bus_size_t boundary,
 934                    dma_addr_t lowaddr, dma_addr_t highaddr,
 935                    bus_dma_filter_t *filter, void *filterarg,
 936                    bus_size_t maxsize, int nsegments,
 937                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
 938 {
 939         bus_dma_tag_t dmat;
 940
 941         dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
 942         if (dmat == NULL)
 943                 return (ENOMEM);
 944
 945         /*
 946          * Linux is very simplistic about DMA memory.  For now don't
 947          * maintain all specification information.  Once Linux supplies
 948          * better facilities for doing these operations, or the
 949          * needs of this particular driver change, we might need to do
 950          * more here.
 951          */
 952         dmat->alignment = alignment;
 953         dmat->boundary = boundary;
 954         dmat->maxsize = maxsize;
 955         *ret_tag = dmat;
 956         return (0);
 957 }
 958
 959 void
 960 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
 961 {
 962         free(dmat, M_DEVBUF);
 963 }
 964
 965 int
 966 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
 967                  int flags, bus_dmamap_t *mapp)
 968 {
 969         *vaddr = pci_alloc_consistent(ahd->dev_softc,
 970                                       dmat->maxsize, mapp);
 971         if (*vaddr == NULL)
 972                 return (ENOMEM);
 973         return(0);
 974 }
 975
 976 void
 977 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
 978                 void* vaddr, bus_dmamap_t map)
 979 {
 980         pci_free_consistent(ahd->dev_softc, dmat->maxsize,
 981                             vaddr, map);
 982 }
 983
 984 int
 985 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
 986                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
 987                 void *cb_arg, int flags)
 988 {
 989         /*
 990          * Assume for now that this will only be used during
 991          * initialization and not for per-transaction buffer mapping.
 992          */
 993         bus_dma_segment_t stack_sg;
 994
 995         stack_sg.ds_addr = map;
 996         stack_sg.ds_len = dmat->maxsize;
 997         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
 998         return (0);
 999 }
1000
1001 void
1002 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1003 {
1004 }
1005
1006 int
1007 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1008 {
1009         /* Nothing to do */
1010         return (0);
1011 }
1012
1013 /********************* Platform Dependent Functions ***************************/
1014 static void
1015 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1016 {
1017
1018         if ((instance >= 0)
1019          && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1020                 uint8_t *iocell_info;
1021
1022                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1023                 iocell_info[index] = value & 0xFFFF;
1024                 if (bootverbose)
1025                         printf("iocell[%d:%ld] = %d\n", instance, index, value);
1026         }
1027 }
1028
1029 static void
1030 ahd_linux_setup_tag_info_global(char *p)
1031 {
1032         int tags, i, j;
1033
1034         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1035         printf("Setting Global Tags= %d\n", tags);
1036
1037         for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1038                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1039                         aic79xx_tag_info[i].tag_commands[j] = tags;
1040                 }
1041         }
1042 }
1043
1044 static void
1045 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1046 {
1047
1048         if ((instance >= 0) && (targ >= 0)
1049          && (instance < ARRAY_SIZE(aic79xx_tag_info))
1050          && (targ < AHD_NUM_TARGETS)) {
1051                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1052                 if (bootverbose)
1053                         printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1054         }
1055 }
1056
1057 static char *
1058 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1059                        void (*callback)(u_long, int, int, int32_t),
1060                        u_long callback_arg)
1061 {
1062         char    *tok_end;
1063         char    *tok_end2;
1064         int      i;
1065         int      instance;
1066         int      targ;
1067         int      done;
1068         char     tok_list[] = {'.', ',', '{', '}', '\0'};
1069
1070         /* All options use a ':' name/arg separator */
1071         if (*opt_arg != ':')
1072                 return (opt_arg);
1073         opt_arg++;
1074         instance = -1;
1075         targ = -1;
1076         done = FALSE;
1077         /*
1078          * Restore separator that may be in
1079          * the middle of our option argument.
1080          */
1081         tok_end = strchr(opt_arg, '\0');
1082         if (tok_end < end)
1083                 *tok_end = ',';
1084         while (!done) {
1085                 switch (*opt_arg) {
1086                 case '{':
1087                         if (instance == -1) {
1088                                 instance = 0;
1089                         } else {
1090                                 if (depth > 1) {
1091                                         if (targ == -1)
1092                                                 targ = 0;
1093                                 } else {
1094                                         printf("Malformed Option %s\n",
1095                                                opt_name);
1096                                         done = TRUE;
1097                                 }
1098                         }
1099                         opt_arg++;
1100                         break;
1101                 case '}':
1102                         if (targ != -1)
1103                                 targ = -1;
1104                         else if (instance != -1)
1105                                 instance = -1;
1106                         opt_arg++;
1107                         break;
1108                 case ',':
1109                 case '.':
1110                         if (instance == -1)
1111                                 done = TRUE;
1112                         else if (targ >= 0)
1113                                 targ++;
1114                         else if (instance >= 0)
1115                                 instance++;
1116                         opt_arg++;
1117                         break;
1118                 case '\0':
1119                         done = TRUE;
1120                         break;
1121                 default:
1122                         tok_end = end;
1123                         for (i = 0; tok_list[i]; i++) {
1124                                 tok_end2 = strchr(opt_arg, tok_list[i]);
1125                                 if ((tok_end2) && (tok_end2 < tok_end))
1126                                         tok_end = tok_end2;
1127                         }
1128                         callback(callback_arg, instance, targ,
1129                                  simple_strtol(opt_arg, NULL, 0));
1130                         opt_arg = tok_end;
1131                         break;
1132                 }
1133         }
1134         return (opt_arg);
1135 }
1136
1137 /*
1138  * Handle Linux boot parameters. This routine allows for assigning a value
1139  * to a parameter with a ':' between the parameter and the value.
1140  * ie. aic79xx=stpwlev:1,extended
1141  */
1142 static int
1143 aic79xx_setup(char *s)
1144 {
1145         int     i, n;
1146         char   *p;
1147         char   *end;
1148
1149         static const struct {
1150                 const char *name;
1151                 uint32_t *flag;
1152         } options[] = {
1153                 { "extended", &aic79xx_extended },
1154                 { "no_reset", &aic79xx_no_reset },
1155                 { "verbose", &aic79xx_verbose },
1156                 { "allow_memio", &aic79xx_allow_memio},
1157 #ifdef AHD_DEBUG
1158                 { "debug", &ahd_debug },
1159 #endif
1160                 { "periodic_otag", &aic79xx_periodic_otag },
1161                 { "pci_parity", &aic79xx_pci_parity },
1162                 { "seltime", &aic79xx_seltime },
1163                 { "tag_info", NULL },
1164                 { "global_tag_depth", NULL},
1165                 { "slewrate", NULL },
1166                 { "precomp", NULL },
1167                 { "amplitude", NULL },
1168                 { "slowcrc", &aic79xx_slowcrc },
1169         };
1170
1171         end = strchr(s, '\0');
1172
1173         /*
1174          * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1175          * will never be 0 in this case.
1176          */
1177         n = 0;
1178
1179         while ((p = strsep(&s, ",.")) != NULL) {
1180                 if (*p == '\0')
1181                         continue;
1182                 for (i = 0; i < ARRAY_SIZE(options); i++) {
1183
1184                         n = strlen(options[i].name);
1185                         if (strncmp(options[i].name, p, n) == 0)
1186                                 break;
1187                 }
1188                 if (i == ARRAY_SIZE(options))
1189                         continue;
1190
1191                 if (strncmp(p, "global_tag_depth", n) == 0) {
1192                         ahd_linux_setup_tag_info_global(p + n);
1193                 } else if (strncmp(p, "tag_info", n) == 0) {
1194                         s = ahd_parse_brace_option("tag_info", p + n, end,
1195                             2, ahd_linux_setup_tag_info, 0);
1196                 } else if (strncmp(p, "slewrate", n) == 0) {
1197                         s = ahd_parse_brace_option("slewrate",
1198                             p + n, end, 1, ahd_linux_setup_iocell_info,
1199                             AIC79XX_SLEWRATE_INDEX);
1200                 } else if (strncmp(p, "precomp", n) == 0) {
1201                         s = ahd_parse_brace_option("precomp",
1202                             p + n, end, 1, ahd_linux_setup_iocell_info,
1203                             AIC79XX_PRECOMP_INDEX);
1204                 } else if (strncmp(p, "amplitude", n) == 0) {
1205                         s = ahd_parse_brace_option("amplitude",
1206                             p + n, end, 1, ahd_linux_setup_iocell_info,
1207                             AIC79XX_AMPLITUDE_INDEX);
1208                 } else if (p[n] == ':') {
1209                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1210                 } else if (!strncmp(p, "verbose", n)) {
1211                         *(options[i].flag) = 1;
1212                 } else {
1213                         *(options[i].flag) ^= 0xFFFFFFFF;
1214                 }
1215         }
1216         return 1;
1217 }
1218
1219 __setup("aic79xx=", aic79xx_setup);
1220
1221 uint32_t aic79xx_verbose;
1222
1223 int
1224 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1225 {
1226         char    buf[80];
1227         struct  Scsi_Host *host;
1228         char    *new_name;
1229         u_long  s;
1230         int     retval;
1231
1232         template->name = ahd->description;
1233         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1234         if (host == NULL)
1235                 return (ENOMEM);
1236
1237         *((struct ahd_softc **)host->hostdata) = ahd;
1238         ahd->platform_data->host = host;
1239         host->can_queue = AHD_MAX_QUEUE;
1240         host->cmd_per_lun = 2;
1241         host->sg_tablesize = AHD_NSEG;
1242         host->this_id = ahd->our_id;
1243         host->irq = ahd->platform_data->irq;
1244         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1245         host->max_lun = AHD_NUM_LUNS;
1246         host->max_channel = 0;
1247         host->sg_tablesize = AHD_NSEG;
1248         ahd_lock(ahd, &s);
1249         ahd_set_unit(ahd, ahd_linux_unit++);
1250         ahd_unlock(ahd, &s);
1251         sprintf(buf, "scsi%d", host->host_no);
1252         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1253         if (new_name != NULL) {
1254                 strcpy(new_name, buf);
1255                 ahd_set_name(ahd, new_name);
1256         }
1257         host->unique_id = ahd->unit;
1258         ahd_linux_initialize_scsi_bus(ahd);
1259         ahd_intr_enable(ahd, TRUE);
1260
1261         host->transportt = ahd_linux_transport_template;
1262
1263         retval = scsi_add_host(host, &ahd->dev_softc->dev);
1264         if (retval) {
1265                 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1266                 scsi_host_put(host);
1267                 return retval;
1268         }
1269
1270         scsi_scan_host(host);
1271         return 0;
1272 }
1273
1274 /*
1275  * Place the SCSI bus into a known state by either resetting it,
1276  * or forcing transfer negotiations on the next command to any
1277  * target.
1278  */
1279 static void
1280 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1281 {
1282         u_int target_id;
1283         u_int numtarg;
1284         unsigned long s;
1285
1286         target_id = 0;
1287         numtarg = 0;
1288
1289         if (aic79xx_no_reset != 0)
1290                 ahd->flags &= ~AHD_RESET_BUS_A;
1291
1292         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1293                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1294         else
1295                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1296
1297         ahd_lock(ahd, &s);
1298
1299         /*
1300          * Force negotiation to async for all targets that
1301          * will not see an initial bus reset.
1302          */
1303         for (; target_id < numtarg; target_id++) {
1304                 struct ahd_devinfo devinfo;
1305                 struct ahd_initiator_tinfo *tinfo;
1306                 struct ahd_tmode_tstate *tstate;
1307
1308                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1309                                             target_id, &tstate);
1310                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1311                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1312                 ahd_update_neg_request(ahd, &devinfo, tstate,
1313                                        tinfo, AHD_NEG_ALWAYS);
1314         }
1315         ahd_unlock(ahd, &s);
1316         /* Give the bus some time to recover */
1317         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1318                 ahd_freeze_simq(ahd);
1319                 msleep(AIC79XX_RESET_DELAY);
1320                 ahd_release_simq(ahd);
1321         }
1322 }
1323
1324 int
1325 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1326 {
1327         ahd->platform_data =
1328             malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1329         if (ahd->platform_data == NULL)
1330                 return (ENOMEM);
1331         memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1332         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1333         ahd_lockinit(ahd);
1334         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1335         return (0);
1336 }
1337
1338 void
1339 ahd_platform_free(struct ahd_softc *ahd)
1340 {
1341         struct scsi_target *starget;
1342         int i;
1343
1344         if (ahd->platform_data != NULL) {
1345                 /* destroy all of the device and target objects */
1346                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1347                         starget = ahd->platform_data->starget[i];
1348                         if (starget != NULL) {
1349                                 ahd->platform_data->starget[i] = NULL;
1350                         }
1351                 }
1352
1353                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1354                         free_irq(ahd->platform_data->irq, ahd);
1355                 if (ahd->tags[0] == BUS_SPACE_PIO
1356                  && ahd->bshs[0].ioport != 0)
1357                         release_region(ahd->bshs[0].ioport, 256);
1358                 if (ahd->tags[1] == BUS_SPACE_PIO
1359                  && ahd->bshs[1].ioport != 0)
1360                         release_region(ahd->bshs[1].ioport, 256);
1361                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1362                  && ahd->bshs[0].maddr != NULL) {
1363                         iounmap(ahd->bshs[0].maddr);
1364                         release_mem_region(ahd->platform_data->mem_busaddr,
1365                                            0x1000);
1366                 }
1367                 if (ahd->platform_data->host)
1368                         scsi_host_put(ahd->platform_data->host);
1369
1370                 free(ahd->platform_data, M_DEVBUF);
1371         }
1372 }
1373
1374 void
1375 ahd_platform_init(struct ahd_softc *ahd)
1376 {
1377         /*
1378          * Lookup and commit any modified IO Cell options.
1379          */
1380         if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1381                 const struct ahd_linux_iocell_opts *iocell_opts;
1382
1383                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1384                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1385                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1386                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1387                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1388                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1389                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1390         }
1391
1392 }
1393
1394 void
1395 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1396 {
1397         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1398                                 SCB_GET_CHANNEL(ahd, scb),
1399                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1400                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1401 }
1402
1403 void
1404 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1405                       struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1406 {
1407         struct ahd_linux_device *dev;
1408         int was_queuing;
1409         int now_queuing;
1410
1411         if (sdev == NULL)
1412                 return;
1413
1414         dev = scsi_transport_device_data(sdev);
1415
1416         if (dev == NULL)
1417                 return;
1418         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1419         switch (alg) {
1420         default:
1421         case AHD_QUEUE_NONE:
1422                 now_queuing = 0;
1423                 break;
1424         case AHD_QUEUE_BASIC:
1425                 now_queuing = AHD_DEV_Q_BASIC;
1426                 break;
1427         case AHD_QUEUE_TAGGED:
1428                 now_queuing = AHD_DEV_Q_TAGGED;
1429                 break;
1430         }
1431         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1432          && (was_queuing != now_queuing)
1433          && (dev->active != 0)) {
1434                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1435                 dev->qfrozen++;
1436         }
1437
1438         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1439         if (now_queuing) {
1440                 u_int usertags;
1441
1442                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1443                 if (!was_queuing) {
1444                         /*
1445                          * Start out agressively and allow our
1446                          * dynamic queue depth algorithm to take
1447                          * care of the rest.
1448                          */
1449                         dev->maxtags = usertags;
1450                         dev->openings = dev->maxtags - dev->active;
1451                 }
1452                 if (dev->maxtags == 0) {
1453                         /*
1454                          * Queueing is disabled by the user.
1455                          */
1456                         dev->openings = 1;
1457                 } else if (alg == AHD_QUEUE_TAGGED) {
1458                         dev->flags |= AHD_DEV_Q_TAGGED;
1459                         if (aic79xx_periodic_otag != 0)
1460                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1461                 } else
1462                         dev->flags |= AHD_DEV_Q_BASIC;
1463         } else {
1464                 /* We can only have one opening. */
1465                 dev->maxtags = 0;
1466                 dev->openings =  1 - dev->active;
1467         }
1468
1469         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1470         case AHD_DEV_Q_BASIC:
1471                 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1472                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1473                 break;
1474         case AHD_DEV_Q_TAGGED:
1475                 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1476                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1477                 break;
1478         default:
1479                 /*
1480                  * We allow the OS to queue 2 untagged transactions to
1481                  * us at any time even though we can only execute them
1482                  * serially on the controller/device.  This should
1483                  * remove some latency.
1484                  */
1485                 scsi_deactivate_tcq(sdev, 1);
1486                 break;
1487         }
1488 }
1489
1490 int
1491 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1492                         int lun, u_int tag, role_t role, uint32_t status)
1493 {
1494         return 0;
1495 }
1496
1497 static u_int
1498 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1499 {
1500         static int warned_user;
1501         u_int tags;
1502
1503         tags = 0;
1504         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1505                 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1506
1507                         if (warned_user == 0) {
1508                                 printf(KERN_WARNING
1509 "aic79xx: WARNING: Insufficient tag_info instances\n"
1510 "aic79xx: for installed controllers.  Using defaults\n"
1511 "aic79xx: Please update the aic79xx_tag_info array in\n"
1512 "aic79xx: the aic79xx_osm.c source file.\n");
1513                                 warned_user++;
1514                         }
1515                         tags = AHD_MAX_QUEUE;
1516                 } else {
1517                         adapter_tag_info_t *tag_info;
1518
1519                         tag_info = &aic79xx_tag_info[ahd->unit];
1520                         tags = tag_info->tag_commands[devinfo->target_offset];
1521                         if (tags > AHD_MAX_QUEUE)
1522                                 tags = AHD_MAX_QUEUE;
1523                 }
1524         }
1525         return (tags);
1526 }
1527
1528 /*
1529  * Determines the queue depth for a given device.
1530  */
1531 static void
1532 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1533 {
1534         struct  ahd_devinfo devinfo;
1535         u_int   tags;
1536         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1537
1538         ahd_compile_devinfo(&devinfo,
1539                             ahd->our_id,
1540                             sdev->sdev_target->id, sdev->lun,
1541                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1542                             ROLE_INITIATOR);
1543         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1544         if (tags != 0 && sdev->tagged_supported != 0) {
1545
1546                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1547                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1548                                devinfo.lun, AC_TRANSFER_NEG);
1549                 ahd_print_devinfo(ahd, &devinfo);
1550                 printf("Tagged Queuing enabled.  Depth %d\n", tags);
1551         } else {
1552                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1553                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1554                                devinfo.lun, AC_TRANSFER_NEG);
1555         }
1556 }
1557
1558 static int
1559 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1560                       struct scsi_cmnd *cmd)
1561 {
1562         struct   scb *scb;
1563         struct   hardware_scb *hscb;
1564         struct   ahd_initiator_tinfo *tinfo;
1565         struct   ahd_tmode_tstate *tstate;
1566         u_int    col_idx;
1567         uint16_t mask;
1568         unsigned long flags;
1569         int nseg;
1570
1571         nseg = scsi_dma_map(cmd);
1572         if (nseg < 0)
1573                 return SCSI_MLQUEUE_HOST_BUSY;
1574
1575         ahd_lock(ahd, &flags);
1576
1577         /*
1578          * Get an scb to use.
1579          */
1580         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1581                                     cmd->device->id, &tstate);
1582         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1583          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1584                 col_idx = AHD_NEVER_COL_IDX;
1585         } else {
1586                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1587                                             cmd->device->lun);
1588         }
1589         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1590                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1591                 ahd_unlock(ahd, &flags);
1592                 scsi_dma_unmap(cmd);
1593                 return SCSI_MLQUEUE_HOST_BUSY;
1594         }
1595
1596         scb->io_ctx = cmd;
1597         scb->platform_data->dev = dev;
1598         hscb = scb->hscb;
1599         cmd->host_scribble = (char *)scb;
1600
1601         /*
1602          * Fill out basics of the HSCB.
1603          */
1604         hscb->control = 0;
1605         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1606         hscb->lun = cmd->device->lun;
1607         scb->hscb->task_management = 0;
1608         mask = SCB_GET_TARGET_MASK(ahd, scb);
1609
1610         if ((ahd->user_discenable & mask) != 0)
1611                 hscb->control |= DISCENB;
1612
1613         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1614                 scb->flags |= SCB_PACKETIZED;
1615
1616         if ((tstate->auto_negotiate & mask) != 0) {
1617                 scb->flags |= SCB_AUTO_NEGOTIATE;
1618                 scb->hscb->control |= MK_MESSAGE;
1619         }
1620
1621         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1622                 int     msg_bytes;
1623                 uint8_t tag_msgs[2];
1624
1625                 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1626                 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1627                         hscb->control |= tag_msgs[0];
1628                         if (tag_msgs[0] == MSG_ORDERED_TASK)
1629                                 dev->commands_since_idle_or_otag = 0;
1630                 } else
1631                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1632                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1633                         hscb->control |= MSG_ORDERED_TASK;
1634                         dev->commands_since_idle_or_otag = 0;
1635                 } else {
1636                         hscb->control |= MSG_SIMPLE_TASK;
1637                 }
1638         }
1639
1640         hscb->cdb_len = cmd->cmd_len;
1641         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1642
1643         scb->platform_data->xfer_len = 0;
1644         ahd_set_residual(scb, 0);
1645         ahd_set_sense_residual(scb, 0);
1646         scb->sg_count = 0;
1647
1648         if (nseg > 0) {
1649                 void *sg = scb->sg_list;
1650                 struct scatterlist *cur_seg;
1651                 int i;
1652
1653                 scb->platform_data->xfer_len = 0;
1654
1655                 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1656                         dma_addr_t addr;
1657                         bus_size_t len;
1658
1659                         addr = sg_dma_address(cur_seg);
1660                         len = sg_dma_len(cur_seg);
1661                         scb->platform_data->xfer_len += len;
1662                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1663                                           i == (nseg - 1));
1664                 }
1665         }
1666
1667         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1668         dev->openings--;
1669         dev->active++;
1670         dev->commands_issued++;
1671
1672         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1673                 dev->commands_since_idle_or_otag++;
1674         scb->flags |= SCB_ACTIVE;
1675         ahd_queue_scb(ahd, scb);
1676
1677         ahd_unlock(ahd, &flags);
1678
1679         return 0;
1680 }
1681
1682 /*
1683  * SCSI controller interrupt handler.
1684  */
1685 irqreturn_t
1686 ahd_linux_isr(int irq, void *dev_id)
1687 {
1688         struct  ahd_softc *ahd;
1689         u_long  flags;
1690         int     ours;
1691
1692         ahd = (struct ahd_softc *) dev_id;
1693         ahd_lock(ahd, &flags);
1694         ours = ahd_intr(ahd);
1695         ahd_unlock(ahd, &flags);
1696         return IRQ_RETVAL(ours);
1697 }
1698
1699 void
1700 ahd_send_async(struct ahd_softc *ahd, char channel,
1701                u_int target, u_int lun, ac_code code)
1702 {
1703         switch (code) {
1704         case AC_TRANSFER_NEG:
1705         {
1706                 char    buf[80];
1707                 struct  scsi_target *starget;
1708                 struct  info_str info;
1709                 struct  ahd_initiator_tinfo *tinfo;
1710                 struct  ahd_tmode_tstate *tstate;
1711                 unsigned int target_ppr_options;
1712
1713                 BUG_ON(target == CAM_TARGET_WILDCARD);
1714
1715                 info.buffer = buf;
1716                 info.length = sizeof(buf);
1717                 info.offset = 0;
1718                 info.pos = 0;
1719                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1720                                             target, &tstate);
1721
1722                 /*
1723                  * Don't bother reporting results while
1724                  * negotiations are still pending.
1725                  */
1726                 if (tinfo->curr.period != tinfo->goal.period
1727                  || tinfo->curr.width != tinfo->goal.width
1728                  || tinfo->curr.offset != tinfo->goal.offset
1729                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1730                         if (bootverbose == 0)
1731                                 break;
1732
1733                 /*
1734                  * Don't bother reporting results that
1735                  * are identical to those last reported.
1736                  */
1737                 starget = ahd->platform_data->starget[target];
1738                 if (starget == NULL)
1739                         break;
1740
1741                 target_ppr_options =
1742                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1743                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1744                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1745                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1746                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1747                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1748                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1749                         + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1750
1751                 if (tinfo->curr.period == spi_period(starget)
1752                     && tinfo->curr.width == spi_width(starget)
1753                     && tinfo->curr.offset == spi_offset(starget)
1754                  && tinfo->curr.ppr_options == target_ppr_options)
1755                         if (bootverbose == 0)
1756                                 break;
1757
1758                 spi_period(starget) = tinfo->curr.period;
1759                 spi_width(starget) = tinfo->curr.width;
1760                 spi_offset(starget) = tinfo->curr.offset;
1761                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1762                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1763                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1764                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1765                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1766                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1767                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1768                 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1769                 spi_display_xfer_agreement(starget);
1770                 break;
1771         }
1772         case AC_SENT_BDR:
1773         {
1774                 WARN_ON(lun != CAM_LUN_WILDCARD);
1775                 scsi_report_device_reset(ahd->platform_data->host,
1776                                          channel - 'A', target);
1777                 break;
1778         }
1779         case AC_BUS_RESET:
1780                 if (ahd->platform_data->host != NULL) {
1781                         scsi_report_bus_reset(ahd->platform_data->host,
1782                                               channel - 'A');
1783                 }
1784                 break;
1785         default:
1786                 panic("ahd_send_async: Unexpected async event");
1787         }
1788 }
1789
1790 /*
1791  * Calls the higher level scsi done function and frees the scb.
1792  */
1793 void
1794 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1795 {
1796         struct scsi_cmnd *cmd;
1797         struct    ahd_linux_device *dev;
1798
1799         if ((scb->flags & SCB_ACTIVE) == 0) {
1800                 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1801                 ahd_dump_card_state(ahd);
1802                 panic("Stopping for safety");
1803         }
1804         LIST_REMOVE(scb, pending_links);
1805         cmd = scb->io_ctx;
1806         dev = scb->platform_data->dev;
1807         dev->active--;
1808         dev->openings++;
1809         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1810                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1811                 dev->qfrozen--;
1812         }
1813         ahd_linux_unmap_scb(ahd, scb);
1814
1815         /*
1816          * Guard against stale sense data.
1817          * The Linux mid-layer assumes that sense
1818          * was retrieved anytime the first byte of
1819          * the sense buffer looks "sane".
1820          */
1821         cmd->sense_buffer[0] = 0;
1822         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1823                 uint32_t amount_xferred;
1824
1825                 amount_xferred =
1826                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1827                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1828 #ifdef AHD_DEBUG
1829                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1830                                 ahd_print_path(ahd, scb);
1831                                 printf("Set CAM_UNCOR_PARITY\n");
1832                         }
1833 #endif
1834                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1835 #ifdef AHD_REPORT_UNDERFLOWS
1836                 /*
1837                  * This code is disabled by default as some
1838                  * clients of the SCSI system do not properly
1839                  * initialize the underflow parameter.  This
1840                  * results in spurious termination of commands
1841                  * that complete as expected (e.g. underflow is
1842                  * allowed as command can return variable amounts
1843                  * of data.
1844                  */
1845                 } else if (amount_xferred < scb->io_ctx->underflow) {
1846                         u_int i;
1847
1848                         ahd_print_path(ahd, scb);
1849                         printf("CDB:");
1850                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1851                                 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1852                         printf("\n");
1853                         ahd_print_path(ahd, scb);
1854                         printf("Saw underflow (%ld of %ld bytes). "
1855                                "Treated as error\n",
1856                                 ahd_get_residual(scb),
1857                                 ahd_get_transfer_length(scb));
1858                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1859 #endif
1860                 } else {
1861                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1862                 }
1863         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1864                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1865         }
1866
1867         if (dev->openings == 1
1868          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1869          && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1870                 dev->tag_success_count++;
1871         /*
1872          * Some devices deal with temporary internal resource
1873          * shortages by returning queue full.  When the queue
1874          * full occurrs, we throttle back.  Slowly try to get
1875          * back to our previous queue depth.
1876          */
1877         if ((dev->openings + dev->active) < dev->maxtags
1878          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1879                 dev->tag_success_count = 0;
1880                 dev->openings++;
1881         }
1882
1883         if (dev->active == 0)
1884                 dev->commands_since_idle_or_otag = 0;
1885
1886         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1887                 printf("Recovery SCB completes\n");
1888                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1889                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1890                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1891
1892                 if (ahd->platform_data->eh_done)
1893                         complete(ahd->platform_data->eh_done);
1894         }
1895
1896         ahd_free_scb(ahd, scb);
1897         ahd_linux_queue_cmd_complete(ahd, cmd);
1898 }
1899
1900 static void
1901 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1902                              struct scsi_device *sdev, struct scb *scb)
1903 {
1904         struct  ahd_devinfo devinfo;
1905         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1906
1907         ahd_compile_devinfo(&devinfo,
1908                             ahd->our_id,
1909                             sdev->sdev_target->id, sdev->lun,
1910                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1911                             ROLE_INITIATOR);
1912
1913         /*
1914          * We don't currently trust the mid-layer to
1915          * properly deal with queue full or busy.  So,
1916          * when one occurs, we tell the mid-layer to
1917          * unconditionally requeue the command to us
1918          * so that we can retry it ourselves.  We also
1919          * implement our own throttling mechanism so
1920          * we don't clobber the device with too many
1921          * commands.
1922          */
1923         switch (ahd_get_scsi_status(scb)) {
1924         default:
1925                 break;
1926         case SCSI_STATUS_CHECK_COND:
1927         case SCSI_STATUS_CMD_TERMINATED:
1928         {
1929                 struct scsi_cmnd *cmd;
1930
1931                 /*
1932                  * Copy sense information to the OS's cmd
1933                  * structure if it is available.
1934                  */
1935                 cmd = scb->io_ctx;
1936                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1937                         struct scsi_status_iu_header *siu;
1938                         u_int sense_size;
1939                         u_int sense_offset;
1940
1941                         if (scb->flags & SCB_SENSE) {
1942                                 sense_size = min(sizeof(struct scsi_sense_data)
1943                                                - ahd_get_sense_residual(scb),
1944                                                  (u_long)SCSI_SENSE_BUFFERSIZE);
1945                                 sense_offset = 0;
1946                         } else {
1947                                 /*
1948                                  * Copy only the sense data into the provided
1949                                  * buffer.
1950                                  */
1951                                 siu = (struct scsi_status_iu_header *)
1952                                     scb->sense_data;
1953                                 sense_size = min_t(size_t,
1954                                                 scsi_4btoul(siu->sense_length),
1955                                                 SCSI_SENSE_BUFFERSIZE);
1956                                 sense_offset = SIU_SENSE_OFFSET(siu);
1957                         }
1958
1959                         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1960                         memcpy(cmd->sense_buffer,
1961                                ahd_get_sense_buf(ahd, scb)
1962                                + sense_offset, sense_size);
1963                         cmd->result |= (DRIVER_SENSE << 24);
1964
1965 #ifdef AHD_DEBUG
1966                         if (ahd_debug & AHD_SHOW_SENSE) {
1967                                 int i;
1968
1969                                 printf("Copied %d bytes of sense data at %d:",
1970                                        sense_size, sense_offset);
1971                                 for (i = 0; i < sense_size; i++) {
1972                                         if ((i & 0xF) == 0)
1973                                                 printf("\n");
1974                                         printf("0x%x ", cmd->sense_buffer[i]);
1975                                 }
1976                                 printf("\n");
1977                         }
1978 #endif
1979                 }
1980                 break;
1981         }
1982         case SCSI_STATUS_QUEUE_FULL:
1983                 /*
1984                  * By the time the core driver has returned this
1985                  * command, all other commands that were queued
1986                  * to us but not the device have been returned.
1987                  * This ensures that dev->active is equal to
1988                  * the number of commands actually queued to
1989                  * the device.
1990                  */
1991                 dev->tag_success_count = 0;
1992                 if (dev->active != 0) {
1993                         /*
1994                          * Drop our opening count to the number
1995                          * of commands currently outstanding.
1996                          */
1997                         dev->openings = 0;
1998 #ifdef AHD_DEBUG
1999                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
2000                                 ahd_print_path(ahd, scb);
2001                                 printf("Dropping tag count to %d\n",
2002                                        dev->active);
2003                         }
2004 #endif
2005                         if (dev->active == dev->tags_on_last_queuefull) {
2006
2007                                 dev->last_queuefull_same_count++;
2008                                 /*
2009                                  * If we repeatedly see a queue full
2010                                  * at the same queue depth, this
2011                                  * device has a fixed number of tag
2012                                  * slots.  Lock in this tag depth
2013                                  * so we stop seeing queue fulls from
2014                                  * this device.
2015                                  */
2016                                 if (dev->last_queuefull_same_count
2017                                  == AHD_LOCK_TAGS_COUNT) {
2018                                         dev->maxtags = dev->active;
2019                                         ahd_print_path(ahd, scb);
2020                                         printf("Locking max tag count at %d\n",
2021                                                dev->active);
2022                                 }
2023                         } else {
2024                                 dev->tags_on_last_queuefull = dev->active;
2025                                 dev->last_queuefull_same_count = 0;
2026                         }
2027                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2028                         ahd_set_scsi_status(scb, SCSI_STATUS_OK);
2029                         ahd_platform_set_tags(ahd, sdev, &devinfo,
2030                                      (dev->flags & AHD_DEV_Q_BASIC)
2031                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2032                         break;
2033                 }
2034                 /*
2035                  * Drop down to a single opening, and treat this
2036                  * as if the target returned BUSY SCSI status.
2037                  */
2038                 dev->openings = 1;
2039                 ahd_platform_set_tags(ahd, sdev, &devinfo,
2040                              (dev->flags & AHD_DEV_Q_BASIC)
2041                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2042                 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2043         }
2044 }
2045
2046 static void
2047 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2048 {
2049         int status;
2050         int new_status = DID_OK;
2051         int do_fallback = 0;
2052         int scsi_status;
2053
2054         /*
2055          * Map CAM error codes into Linux Error codes.  We
2056          * avoid the conversion so that the DV code has the
2057          * full error information available when making
2058          * state change decisions.
2059          */
2060
2061         status = ahd_cmd_get_transaction_status(cmd);
2062         switch (status) {
2063         case CAM_REQ_INPROG:
2064         case CAM_REQ_CMP:
2065                 new_status = DID_OK;
2066                 break;
2067         case CAM_AUTOSENSE_FAIL:
2068                 new_status = DID_ERROR;
2069                 /* Fallthrough */
2070         case CAM_SCSI_STATUS_ERROR:
2071                 scsi_status = ahd_cmd_get_scsi_status(cmd);
2072
2073                 switch(scsi_status) {
2074                 case SCSI_STATUS_CMD_TERMINATED:
2075                 case SCSI_STATUS_CHECK_COND:
2076                         if ((cmd->result >> 24) != DRIVER_SENSE) {
2077                                 do_fallback = 1;
2078                         } else {
2079                                 struct scsi_sense_data *sense;
2080
2081                                 sense = (struct scsi_sense_data *)
2082                                         cmd->sense_buffer;
2083                                 if (sense->extra_len >= 5 &&
2084                                     (sense->add_sense_code == 0x47
2085                                      || sense->add_sense_code == 0x48))
2086                                         do_fallback = 1;
2087                         }
2088                         break;
2089                 default:
2090                         break;
2091                 }
2092                 break;
2093         case CAM_REQ_ABORTED:
2094                 new_status = DID_ABORT;
2095                 break;
2096         case CAM_BUSY:
2097                 new_status = DID_BUS_BUSY;
2098                 break;
2099         case CAM_REQ_INVALID:
2100         case CAM_PATH_INVALID:
2101                 new_status = DID_BAD_TARGET;
2102                 break;
2103         case CAM_SEL_TIMEOUT:
2104                 new_status = DID_NO_CONNECT;
2105                 break;
2106         case CAM_SCSI_BUS_RESET:
2107         case CAM_BDR_SENT:
2108                 new_status = DID_RESET;
2109                 break;
2110         case CAM_UNCOR_PARITY:
2111                 new_status = DID_PARITY;
2112                 do_fallback = 1;
2113                 break;
2114         case CAM_CMD_TIMEOUT:
2115                 new_status = DID_TIME_OUT;
2116                 do_fallback = 1;
2117                 break;
2118         case CAM_REQ_CMP_ERR:
2119         case CAM_UNEXP_BUSFREE:
2120         case CAM_DATA_RUN_ERR:
2121                 new_status = DID_ERROR;
2122                 do_fallback = 1;
2123                 break;
2124         case CAM_UA_ABORT:
2125         case CAM_NO_HBA:
2126         case CAM_SEQUENCE_FAIL:
2127         case CAM_CCB_LEN_ERR:
2128         case CAM_PROVIDE_FAIL:
2129         case CAM_REQ_TERMIO:
2130         case CAM_UNREC_HBA_ERROR:
2131         case CAM_REQ_TOO_BIG:
2132                 new_status = DID_ERROR;
2133                 break;
2134         case CAM_REQUEUE_REQ:
2135                 new_status = DID_REQUEUE;
2136                 break;
2137         default:
2138                 /* We should never get here */
2139                 new_status = DID_ERROR;
2140                 break;
2141         }
2142
2143         if (do_fallback) {
2144                 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2145                        ahd_name(ahd), status, cmd->device->channel,
2146                        cmd->device->id, cmd->device->lun);
2147         }
2148
2149         ahd_cmd_set_transaction_status(cmd, new_status);
2150
2151         cmd->scsi_done(cmd);
2152 }
2153
2154 static void
2155 ahd_freeze_simq(struct ahd_softc *ahd)
2156 {
2157         scsi_block_requests(ahd->platform_data->host);
2158 }
2159
2160 static void
2161 ahd_release_simq(struct ahd_softc *ahd)
2162 {
2163         scsi_unblock_requests(ahd->platform_data->host);
2164 }
2165
2166 static int
2167 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2168 {
2169         struct ahd_softc *ahd;
2170         struct ahd_linux_device *dev;
2171         struct scb *pending_scb;
2172         u_int  saved_scbptr;
2173         u_int  active_scbptr;
2174         u_int  last_phase;
2175         u_int  saved_scsiid;
2176         u_int  cdb_byte;
2177         int    retval;
2178         int    was_paused;
2179         int    paused;
2180         int    wait;
2181         int    disconnected;
2182         ahd_mode_state saved_modes;
2183         unsigned long flags;
2184
2185         pending_scb = NULL;
2186         paused = FALSE;
2187         wait = FALSE;
2188         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2189
2190         scmd_printk(KERN_INFO, cmd,
2191                     "Attempting to queue an ABORT message:");
2192
2193         printf("CDB:");
2194         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2195                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2196         printf("\n");
2197
2198         ahd_lock(ahd, &flags);
2199
2200         /*
2201          * First determine if we currently own this command.
2202          * Start by searching the device queue.  If not found
2203          * there, check the pending_scb list.  If not found
2204          * at all, and the system wanted us to just abort the
2205          * command, return success.
2206          */
2207         dev = scsi_transport_device_data(cmd->device);
2208
2209         if (dev == NULL) {
2210                 /*
2211                  * No target device for this command exists,
2212                  * so we must not still own the command.
2213                  */
2214                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2215                 retval = SUCCESS;
2216                 goto no_cmd;
2217         }
2218
2219         /*
2220          * See if we can find a matching cmd in the pending list.
2221          */
2222         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2223                 if (pending_scb->io_ctx == cmd)
2224                         break;
2225         }
2226
2227         if (pending_scb == NULL) {
2228                 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2229                 goto no_cmd;
2230         }
2231
2232         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2233                 /*
2234                  * We can't queue two recovery actions using the same SCB
2235                  */
2236                 retval = FAILED;
2237                 goto  done;
2238         }
2239
2240         /*
2241          * Ensure that the card doesn't do anything
2242          * behind our back.  Also make sure that we
2243          * didn't "just" miss an interrupt that would
2244          * affect this cmd.
2245          */
2246         was_paused = ahd_is_paused(ahd);
2247         ahd_pause_and_flushwork(ahd);
2248         paused = TRUE;
2249
2250         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2251                 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2252                 goto no_cmd;
2253         }
2254
2255         printf("%s: At time of recovery, card was %spaused\n",
2256                ahd_name(ahd), was_paused ? "" : "not ");
2257         ahd_dump_card_state(ahd);
2258
2259         disconnected = TRUE;
2260         if (ahd_search_qinfifo(ahd, cmd->device->id,
2261                                cmd->device->channel + 'A',
2262                                cmd->device->lun,
2263                                pending_scb->hscb->tag,
2264                                ROLE_INITIATOR, CAM_REQ_ABORTED,
2265                                SEARCH_COMPLETE) > 0) {
2266                 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2267                        ahd_name(ahd), cmd->device->channel,
2268                        cmd->device->id, cmd->device->lun);
2269                 retval = SUCCESS;
2270                 goto done;
2271         }
2272
2273         saved_modes = ahd_save_modes(ahd);
2274         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2275         last_phase = ahd_inb(ahd, LASTPHASE);
2276         saved_scbptr = ahd_get_scbptr(ahd);
2277         active_scbptr = saved_scbptr;
2278         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2279                 struct scb *bus_scb;
2280
2281                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2282                 if (bus_scb == pending_scb)
2283                         disconnected = FALSE;
2284         }
2285
2286         /*
2287          * At this point, pending_scb is the scb associated with the
2288          * passed in command.  That command is currently active on the
2289          * bus or is in the disconnected state.
2290          */
2291         saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2292         if (last_phase != P_BUSFREE
2293             && SCB_GET_TAG(pending_scb) == active_scbptr) {
2294
2295                 /*
2296                  * We're active on the bus, so assert ATN
2297                  * and hope that the target responds.
2298                  */
2299                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2300                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2301                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2302                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2303                 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2304                 wait = TRUE;
2305         } else if (disconnected) {
2306
2307                 /*
2308                  * Actually re-queue this SCB in an attempt
2309                  * to select the device before it reconnects.
2310                  */
2311                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2312                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2313                 pending_scb->hscb->cdb_len = 0;
2314                 pending_scb->hscb->task_attribute = 0;
2315                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2316
2317                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2318                         /*
2319                          * Mark the SCB has having an outstanding
2320                          * task management function.  Should the command
2321                          * complete normally before the task management
2322                          * function can be sent, the host will be notified
2323                          * to abort our requeued SCB.
2324                          */
2325                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2326                                  pending_scb->hscb->task_management);
2327                 } else {
2328                         /*
2329                          * If non-packetized, set the MK_MESSAGE control
2330                          * bit indicating that we desire to send a message.
2331                          * We also set the disconnected flag since there is
2332                          * no guarantee that our SCB control byte matches
2333                          * the version on the card.  We don't want the
2334                          * sequencer to abort the command thinking an
2335                          * unsolicited reselection occurred.
2336                          */
2337                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2338
2339                         /*
2340                          * The sequencer will never re-reference the
2341                          * in-core SCB.  To make sure we are notified
2342                          * during reslection, set the MK_MESSAGE flag in
2343                          * the card's copy of the SCB.
2344                          */
2345                         ahd_outb(ahd, SCB_CONTROL,
2346                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2347                 }
2348
2349                 /*
2350                  * Clear out any entries in the QINFIFO first
2351                  * so we are the next SCB for this target
2352                  * to run.
2353                  */
2354                 ahd_search_qinfifo(ahd, cmd->device->id,
2355                                    cmd->device->channel + 'A', cmd->device->lun,
2356                                    SCB_LIST_NULL, ROLE_INITIATOR,
2357                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2358                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2359                 ahd_set_scbptr(ahd, saved_scbptr);
2360                 ahd_print_path(ahd, pending_scb);
2361                 printf("Device is disconnected, re-queuing SCB\n");
2362                 wait = TRUE;
2363         } else {
2364                 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2365                 retval = FAILED;
2366                 goto done;
2367         }
2368
2369 no_cmd:
2370         /*
2371          * Our assumption is that if we don't have the command, no
2372          * recovery action was required, so we return success.  Again,
2373          * the semantics of the mid-layer recovery engine are not
2374          * well defined, so this may change in time.
2375          */
2376         retval = SUCCESS;
2377 done:
2378         if (paused)
2379                 ahd_unpause(ahd);
2380         if (wait) {
2381                 DECLARE_COMPLETION_ONSTACK(done);
2382
2383                 ahd->platform_data->eh_done = &done;
2384                 ahd_unlock(ahd, &flags);
2385
2386                 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2387                 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2388                         ahd_lock(ahd, &flags);
2389                         ahd->platform_data->eh_done = NULL;
2390                         ahd_unlock(ahd, &flags);
2391                         printf("%s: Timer Expired (active %d)\n",
2392                                ahd_name(ahd), dev->active);
2393                         retval = FAILED;
2394                 }
2395                 printf("Recovery code awake\n");
2396         } else
2397                 ahd_unlock(ahd, &flags);
2398
2399         if (retval != SUCCESS)
2400                 printf("%s: Command abort returning 0x%x\n",
2401                        ahd_name(ahd), retval);
2402
2403         return retval;
2404 }
2405
2406 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2407 {
2408         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2409         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2410         struct ahd_devinfo devinfo;
2411         unsigned long flags;
2412
2413         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2414                             starget->channel + 'A', ROLE_INITIATOR);
2415         ahd_lock(ahd, &flags);
2416         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2417         ahd_unlock(ahd, &flags);
2418 }
2419
2420 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2421 {
2422         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2423         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2424         struct ahd_tmode_tstate *tstate;
2425         struct ahd_initiator_tinfo *tinfo
2426                 = ahd_fetch_transinfo(ahd,
2427                                       starget->channel + 'A',
2428                                       shost->this_id, starget->id, &tstate);
2429         struct ahd_devinfo devinfo;
2430         unsigned int ppr_options = tinfo->goal.ppr_options;
2431         unsigned int dt;
2432         unsigned long flags;
2433         unsigned long offset = tinfo->goal.offset;
2434
2435 #ifdef AHD_DEBUG
2436         if ((ahd_debug & AHD_SHOW_DV) != 0)
2437                 printf("%s: set period to %d\n", ahd_name(ahd), period);
2438 #endif
2439         if (offset == 0)
2440                 offset = MAX_OFFSET;
2441
2442         if (period < 8)
2443                 period = 8;
2444         if (period < 10) {
2445                 if (spi_max_width(starget)) {
2446                         ppr_options |= MSG_EXT_PPR_DT_REQ;
2447                         if (period == 8)
2448                                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2449                 } else
2450                         period = 10;
2451         }
2452
2453         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2454
2455         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2456                             starget->channel + 'A', ROLE_INITIATOR);
2457
2458         /* all PPR requests apart from QAS require wide transfers */
2459         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2460                 if (spi_width(starget) == 0)
2461                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2462         }
2463
2464         ahd_find_syncrate(ahd, &period, &ppr_options,
2465                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2466
2467         ahd_lock(ahd, &flags);
2468         ahd_set_syncrate(ahd, &devinfo, period, offset,
2469                          ppr_options, AHD_TRANS_GOAL, FALSE);
2470         ahd_unlock(ahd, &flags);
2471 }
2472
2473 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2474 {
2475         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2476         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2477         struct ahd_tmode_tstate *tstate;
2478         struct ahd_initiator_tinfo *tinfo
2479                 = ahd_fetch_transinfo(ahd,
2480                                       starget->channel + 'A',
2481                                       shost->this_id, starget->id, &tstate);
2482         struct ahd_devinfo devinfo;
2483         unsigned int ppr_options = 0;
2484         unsigned int period = 0;
2485         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2486         unsigned long flags;
2487
2488 #ifdef AHD_DEBUG
2489         if ((ahd_debug & AHD_SHOW_DV) != 0)
2490                 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2491 #endif
2492
2493         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2494                             starget->channel + 'A', ROLE_INITIATOR);
2495         if (offset != 0) {
2496                 period = tinfo->goal.period;
2497                 ppr_options = tinfo->goal.ppr_options;
2498                 ahd_find_syncrate(ahd, &period, &ppr_options,
2499                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2500         }
2501
2502         ahd_lock(ahd, &flags);
2503         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2504                          AHD_TRANS_GOAL, FALSE);
2505         ahd_unlock(ahd, &flags);
2506 }
2507
2508 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2509 {
2510         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2511         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2512         struct ahd_tmode_tstate *tstate;
2513         struct ahd_initiator_tinfo *tinfo
2514                 = ahd_fetch_transinfo(ahd,
2515                                       starget->channel + 'A',
2516                                       shost->this_id, starget->id, &tstate);
2517         struct ahd_devinfo devinfo;
2518         unsigned int ppr_options = tinfo->goal.ppr_options
2519                 & ~MSG_EXT_PPR_DT_REQ;
2520         unsigned int period = tinfo->goal.period;
2521         unsigned int width = tinfo->goal.width;
2522         unsigned long flags;
2523
2524 #ifdef AHD_DEBUG
2525         if ((ahd_debug & AHD_SHOW_DV) != 0)
2526                 printf("%s: %s DT\n", ahd_name(ahd),
2527                        dt ? "enabling" : "disabling");
2528 #endif
2529         if (dt && spi_max_width(starget)) {
2530                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2531                 if (!width)
2532                         ahd_linux_set_width(starget, 1);
2533         } else {
2534                 if (period <= 9)
2535                         period = 10; /* If resetting DT, period must be >= 25ns */
2536                 /* IU is invalid without DT set */
2537                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2538         }
2539         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2540                             starget->channel + 'A', ROLE_INITIATOR);
2541         ahd_find_syncrate(ahd, &period, &ppr_options,
2542                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2543
2544         ahd_lock(ahd, &flags);
2545         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2546                          ppr_options, AHD_TRANS_GOAL, FALSE);
2547         ahd_unlock(ahd, &flags);
2548 }
2549
2550 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2551 {
2552         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2553         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2554         struct ahd_tmode_tstate *tstate;
2555         struct ahd_initiator_tinfo *tinfo
2556                 = ahd_fetch_transinfo(ahd,
2557                                       starget->channel + 'A',
2558                                       shost->this_id, starget->id, &tstate);
2559         struct ahd_devinfo devinfo;
2560         unsigned int ppr_options = tinfo->goal.ppr_options
2561                 & ~MSG_EXT_PPR_QAS_REQ;
2562         unsigned int period = tinfo->goal.period;
2563         unsigned int dt;
2564         unsigned long flags;
2565
2566 #ifdef AHD_DEBUG
2567         if ((ahd_debug & AHD_SHOW_DV) != 0)
2568                 printf("%s: %s QAS\n", ahd_name(ahd),
2569                        qas ? "enabling" : "disabling");
2570 #endif
2571
2572         if (qas) {
2573                 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2574         }
2575
2576         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2577
2578         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2579                             starget->channel + 'A', ROLE_INITIATOR);
2580         ahd_find_syncrate(ahd, &period, &ppr_options,
2581                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2582
2583         ahd_lock(ahd, &flags);
2584         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2585                          ppr_options, AHD_TRANS_GOAL, FALSE);
2586         ahd_unlock(ahd, &flags);
2587 }
2588
2589 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2590 {
2591         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2592         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2593         struct ahd_tmode_tstate *tstate;
2594         struct ahd_initiator_tinfo *tinfo
2595                 = ahd_fetch_transinfo(ahd,
2596                                       starget->channel + 'A',
2597                                       shost->this_id, starget->id, &tstate);
2598         struct ahd_devinfo devinfo;
2599         unsigned int ppr_options = tinfo->goal.ppr_options
2600                 & ~MSG_EXT_PPR_IU_REQ;
2601         unsigned int period = tinfo->goal.period;
2602         unsigned int dt;
2603         unsigned long flags;
2604
2605 #ifdef AHD_DEBUG
2606         if ((ahd_debug & AHD_SHOW_DV) != 0)
2607                 printf("%s: %s IU\n", ahd_name(ahd),
2608                        iu ? "enabling" : "disabling");
2609 #endif
2610
2611         if (iu && spi_max_width(starget)) {
2612                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2613                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2614         }
2615
2616         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2617
2618         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2619                             starget->channel + 'A', ROLE_INITIATOR);
2620         ahd_find_syncrate(ahd, &period, &ppr_options,
2621                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2622
2623         ahd_lock(ahd, &flags);
2624         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2625                          ppr_options, AHD_TRANS_GOAL, FALSE);
2626         ahd_unlock(ahd, &flags);
2627 }
2628
2629 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2630 {
2631         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2632         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2633         struct ahd_tmode_tstate *tstate;
2634         struct ahd_initiator_tinfo *tinfo
2635                 = ahd_fetch_transinfo(ahd,
2636                                       starget->channel + 'A',
2637                                       shost->this_id, starget->id, &tstate);
2638         struct ahd_devinfo devinfo;
2639         unsigned int ppr_options = tinfo->goal.ppr_options
2640                 & ~MSG_EXT_PPR_RD_STRM;
2641         unsigned int period = tinfo->goal.period;
2642         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2643         unsigned long flags;
2644
2645 #ifdef AHD_DEBUG
2646         if ((ahd_debug & AHD_SHOW_DV) != 0)
2647                 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2648                        rdstrm  ? "enabling" : "disabling");
2649 #endif
2650
2651         if (rdstrm && spi_max_width(starget))
2652                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2653
2654         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2655                             starget->channel + 'A', ROLE_INITIATOR);
2656         ahd_find_syncrate(ahd, &period, &ppr_options,
2657                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2658
2659         ahd_lock(ahd, &flags);
2660         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2661                          ppr_options, AHD_TRANS_GOAL, FALSE);
2662         ahd_unlock(ahd, &flags);
2663 }
2664
2665 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2666 {
2667         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2668         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2669         struct ahd_tmode_tstate *tstate;
2670         struct ahd_initiator_tinfo *tinfo
2671                 = ahd_fetch_transinfo(ahd,
2672                                       starget->channel + 'A',
2673                                       shost->this_id, starget->id, &tstate);
2674         struct ahd_devinfo devinfo;
2675         unsigned int ppr_options = tinfo->goal.ppr_options
2676                 & ~MSG_EXT_PPR_WR_FLOW;
2677         unsigned int period = tinfo->goal.period;
2678         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2679         unsigned long flags;
2680
2681 #ifdef AHD_DEBUG
2682         if ((ahd_debug & AHD_SHOW_DV) != 0)
2683                 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2684                        wrflow ? "enabling" : "disabling");
2685 #endif
2686
2687         if (wrflow && spi_max_width(starget))
2688                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2689
2690         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2691                             starget->channel + 'A', ROLE_INITIATOR);
2692         ahd_find_syncrate(ahd, &period, &ppr_options,
2693                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2694
2695         ahd_lock(ahd, &flags);
2696         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2697                          ppr_options, AHD_TRANS_GOAL, FALSE);
2698         ahd_unlock(ahd, &flags);
2699 }
2700
2701 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2702 {
2703         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2704         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2705         struct ahd_tmode_tstate *tstate;
2706         struct ahd_initiator_tinfo *tinfo
2707                 = ahd_fetch_transinfo(ahd,
2708                                       starget->channel + 'A',
2709                                       shost->this_id, starget->id, &tstate);
2710         struct ahd_devinfo devinfo;
2711         unsigned int ppr_options = tinfo->goal.ppr_options
2712                 & ~MSG_EXT_PPR_RTI;
2713         unsigned int period = tinfo->goal.period;
2714         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2715         unsigned long flags;
2716
2717         if ((ahd->features & AHD_RTI) == 0) {
2718 #ifdef AHD_DEBUG
2719                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2720                         printf("%s: RTI not available\n", ahd_name(ahd));
2721 #endif
2722                 return;
2723         }
2724
2725 #ifdef AHD_DEBUG
2726         if ((ahd_debug & AHD_SHOW_DV) != 0)
2727                 printf("%s: %s RTI\n", ahd_name(ahd),
2728                        rti ? "enabling" : "disabling");
2729 #endif
2730
2731         if (rti && spi_max_width(starget))
2732                 ppr_options |= MSG_EXT_PPR_RTI;
2733
2734         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2735                             starget->channel + 'A', ROLE_INITIATOR);
2736         ahd_find_syncrate(ahd, &period, &ppr_options,
2737                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2738
2739         ahd_lock(ahd, &flags);
2740         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2741                          ppr_options, AHD_TRANS_GOAL, FALSE);
2742         ahd_unlock(ahd, &flags);
2743 }
2744
2745 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2746 {
2747         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2748         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2749         struct ahd_tmode_tstate *tstate;
2750         struct ahd_initiator_tinfo *tinfo
2751                 = ahd_fetch_transinfo(ahd,
2752                                       starget->channel + 'A',
2753                                       shost->this_id, starget->id, &tstate);
2754         struct ahd_devinfo devinfo;
2755         unsigned int ppr_options = tinfo->goal.ppr_options
2756                 & ~MSG_EXT_PPR_PCOMP_EN;
2757         unsigned int period = tinfo->goal.period;
2758         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2759         unsigned long flags;
2760
2761 #ifdef AHD_DEBUG
2762         if ((ahd_debug & AHD_SHOW_DV) != 0)
2763                 printf("%s: %s Precompensation\n", ahd_name(ahd),
2764                        pcomp ? "Enable" : "Disable");
2765 #endif
2766
2767         if (pcomp && spi_max_width(starget)) {
2768                 uint8_t precomp;
2769
2770                 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2771                         const struct ahd_linux_iocell_opts *iocell_opts;
2772
2773                         iocell_opts = &aic79xx_iocell_info[ahd->unit];
2774                         precomp = iocell_opts->precomp;
2775                 } else {
2776                         precomp = AIC79XX_DEFAULT_PRECOMP;
2777                 }
2778                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2779                 AHD_SET_PRECOMP(ahd, precomp);
2780         } else {
2781                 AHD_SET_PRECOMP(ahd, 0);
2782         }
2783
2784         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2785                             starget->channel + 'A', ROLE_INITIATOR);
2786         ahd_find_syncrate(ahd, &period, &ppr_options,
2787                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2788
2789         ahd_lock(ahd, &flags);
2790         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2791                          ppr_options, AHD_TRANS_GOAL, FALSE);
2792         ahd_unlock(ahd, &flags);
2793 }
2794
2795 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2796 {
2797         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2798         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2799         struct ahd_tmode_tstate *tstate;
2800         struct ahd_initiator_tinfo *tinfo
2801                 = ahd_fetch_transinfo(ahd,
2802                                       starget->channel + 'A',
2803                                       shost->this_id, starget->id, &tstate);
2804         struct ahd_devinfo devinfo;
2805         unsigned int ppr_options = tinfo->goal.ppr_options
2806                 & ~MSG_EXT_PPR_HOLD_MCS;
2807         unsigned int period = tinfo->goal.period;
2808         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2809         unsigned long flags;
2810
2811         if (hold && spi_max_width(starget))
2812                 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2813
2814         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2815                             starget->channel + 'A', ROLE_INITIATOR);
2816         ahd_find_syncrate(ahd, &period, &ppr_options,
2817                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2818
2819         ahd_lock(ahd, &flags);
2820         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2821                          ppr_options, AHD_TRANS_GOAL, FALSE);
2822         ahd_unlock(ahd, &flags);
2823 }
2824
2825 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2826 {
2827         struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2828         unsigned long flags;
2829         u8 mode;
2830
2831         ahd_lock(ahd, &flags);
2832         ahd_pause(ahd);
2833         mode = ahd_inb(ahd, SBLKCTL);
2834         ahd_unpause(ahd);
2835         ahd_unlock(ahd, &flags);
2836
2837         if (mode & ENAB40)
2838                 spi_signalling(shost) = SPI_SIGNAL_LVD;
2839         else if (mode & ENAB20)
2840                 spi_signalling(shost) = SPI_SIGNAL_SE;
2841         else
2842                 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2843 }
2844
2845 static struct spi_function_template ahd_linux_transport_functions = {
2846         .set_offset     = ahd_linux_set_offset,
2847         .show_offset    = 1,
2848         .set_period     = ahd_linux_set_period,
2849         .show_period    = 1,
2850         .set_width      = ahd_linux_set_width,
2851         .show_width     = 1,
2852         .set_dt         = ahd_linux_set_dt,
2853         .show_dt        = 1,
2854         .set_iu         = ahd_linux_set_iu,
2855         .show_iu        = 1,
2856         .set_qas        = ahd_linux_set_qas,
2857         .show_qas       = 1,
2858         .set_rd_strm    = ahd_linux_set_rd_strm,
2859         .show_rd_strm   = 1,
2860         .set_wr_flow    = ahd_linux_set_wr_flow,
2861         .show_wr_flow   = 1,
2862         .set_rti        = ahd_linux_set_rti,
2863         .show_rti       = 1,
2864         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2865         .show_pcomp_en  = 1,
2866         .set_hold_mcs   = ahd_linux_set_hold_mcs,
2867         .show_hold_mcs  = 1,
2868         .get_signalling = ahd_linux_get_signalling,
2869 };
2870
2871 static int __init
2872 ahd_linux_init(void)
2873 {
2874         int     error = 0;
2875
2876         /*
2877          * If we've been passed any parameters, process them now.
2878          */
2879         if (aic79xx)
2880                 aic79xx_setup(aic79xx);
2881
2882         ahd_linux_transport_template =
2883                 spi_attach_transport(&ahd_linux_transport_functions);
2884         if (!ahd_linux_transport_template)
2885                 return -ENODEV;
2886
2887         scsi_transport_reserve_device(ahd_linux_transport_template,
2888                                       sizeof(struct ahd_linux_device));
2889
2890         error = ahd_linux_pci_init();
2891         if (error)
2892                 spi_release_transport(ahd_linux_transport_template);
2893         return error;
2894 }
2895
2896 static void __exit
2897 ahd_linux_exit(void)
2898 {
2899         ahd_linux_pci_exit();
2900         spi_release_transport(ahd_linux_transport_template);
2901 }
2902
2903 module_init(ahd_linux_init);
2904 module_exit(ahd_linux_exit);