err.no 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 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 ");
 561         strcat(bp, AIC79XX_DRIVER_VERSION);
 562         strcat(bp, "\n");
 563         strcat(bp, "        <");
 564         strcat(bp, ahd->description);
 565         strcat(bp, ">\n");
 566         strcat(bp, "        ");
 567         ahd_controller_info(ahd, ahd_info);
 568         strcat(bp, ahd_info);
 569
 570         return (bp);
 571 }
 572
 573 /*
 574  * Queue an SCB to the controller.
 575  */
 576 static int
 577 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 578 {
 579         struct   ahd_softc *ahd;
 580         struct   ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
 581         int rtn = SCSI_MLQUEUE_HOST_BUSY;
 582
 583         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 584
 585         cmd->scsi_done = scsi_done;
 586         cmd->result = CAM_REQ_INPROG << 16;
 587         rtn = ahd_linux_run_command(ahd, dev, cmd);
 588
 589         return rtn;
 590 }
 591
 592 static struct scsi_target **
 593 ahd_linux_target_in_softc(struct scsi_target *starget)
 594 {
 595         struct  ahd_softc *ahd =
 596                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 597         unsigned int target_offset;
 598
 599         target_offset = starget->id;
 600         if (starget->channel != 0)
 601                 target_offset += 8;
 602
 603         return &ahd->platform_data->starget[target_offset];
 604 }
 605
 606 static int
 607 ahd_linux_target_alloc(struct scsi_target *starget)
 608 {
 609         struct  ahd_softc *ahd =
 610                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 611         struct seeprom_config *sc = ahd->seep_config;
 612         unsigned long flags;
 613         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 614         struct ahd_devinfo devinfo;
 615         struct ahd_initiator_tinfo *tinfo;
 616         struct ahd_tmode_tstate *tstate;
 617         char channel = starget->channel + 'A';
 618
 619         ahd_lock(ahd, &flags);
 620
 621         BUG_ON(*ahd_targp != NULL);
 622
 623         *ahd_targp = starget;
 624
 625         if (sc) {
 626                 int flags = sc->device_flags[starget->id];
 627
 628                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 629                                             starget->id, &tstate);
 630
 631                 if ((flags  & CFPACKETIZED) == 0) {
 632                         /* Do not negotiate packetized transfers */
 633                         spi_rd_strm(starget) = 0;
 634                         spi_pcomp_en(starget) = 0;
 635                         spi_rti(starget) = 0;
 636                         spi_wr_flow(starget) = 0;
 637                         spi_hold_mcs(starget) = 0;
 638                 } else {
 639                         if ((ahd->features & AHD_RTI) == 0)
 640                                 spi_rti(starget) = 0;
 641                 }
 642
 643                 if ((flags & CFQAS) == 0)
 644                         spi_qas(starget) = 0;
 645
 646                 /* Transinfo values have been set to BIOS settings */
 647                 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
 648                 spi_min_period(starget) = tinfo->user.period;
 649                 spi_max_offset(starget) = tinfo->user.offset;
 650         }
 651
 652         tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
 653                                     starget->id, &tstate);
 654         ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
 655                             CAM_LUN_WILDCARD, channel,
 656                             ROLE_INITIATOR);
 657         ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
 658                          AHD_TRANS_GOAL, /*paused*/FALSE);
 659         ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
 660                       AHD_TRANS_GOAL, /*paused*/FALSE);
 661         ahd_unlock(ahd, &flags);
 662
 663         return 0;
 664 }
 665
 666 static void
 667 ahd_linux_target_destroy(struct scsi_target *starget)
 668 {
 669         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 670
 671         *ahd_targp = NULL;
 672 }
 673
 674 static int
 675 ahd_linux_slave_alloc(struct scsi_device *sdev)
 676 {
 677         struct  ahd_softc *ahd =
 678                 *((struct ahd_softc **)sdev->host->hostdata);
 679         struct ahd_linux_device *dev;
 680
 681         if (bootverbose)
 682                 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
 683
 684         dev = scsi_transport_device_data(sdev);
 685         memset(dev, 0, sizeof(*dev));
 686
 687         /*
 688          * We start out life using untagged
 689          * transactions of which we allow one.
 690          */
 691         dev->openings = 1;
 692
 693         /*
 694          * Set maxtags to 0.  This will be changed if we
 695          * later determine that we are dealing with
 696          * a tagged queuing capable device.
 697          */
 698         dev->maxtags = 0;
 699
 700         return (0);
 701 }
 702
 703 static int
 704 ahd_linux_slave_configure(struct scsi_device *sdev)
 705 {
 706         struct  ahd_softc *ahd;
 707
 708         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 709         if (bootverbose)
 710                 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
 711
 712         ahd_linux_device_queue_depth(sdev);
 713
 714         /* Initial Domain Validation */
 715         if (!spi_initial_dv(sdev->sdev_target))
 716                 spi_dv_device(sdev);
 717
 718         return 0;
 719 }
 720
 721 #if defined(__i386__)
 722 /*
 723  * Return the disk geometry for the given SCSI device.
 724  */
 725 static int
 726 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 727                     sector_t capacity, int geom[])
 728 {
 729         uint8_t *bh;
 730         int      heads;
 731         int      sectors;
 732         int      cylinders;
 733         int      ret;
 734         int      extended;
 735         struct   ahd_softc *ahd;
 736
 737         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 738
 739         bh = scsi_bios_ptable(bdev);
 740         if (bh) {
 741                 ret = scsi_partsize(bh, capacity,
 742                                     &geom[2], &geom[0], &geom[1]);
 743                 kfree(bh);
 744                 if (ret != -1)
 745                         return (ret);
 746         }
 747         heads = 64;
 748         sectors = 32;
 749         cylinders = aic_sector_div(capacity, heads, sectors);
 750
 751         if (aic79xx_extended != 0)
 752                 extended = 1;
 753         else
 754                 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
 755         if (extended && cylinders >= 1024) {
 756                 heads = 255;
 757                 sectors = 63;
 758                 cylinders = aic_sector_div(capacity, heads, sectors);
 759         }
 760         geom[0] = heads;
 761         geom[1] = sectors;
 762         geom[2] = cylinders;
 763         return (0);
 764 }
 765 #endif
 766
 767 /*
 768  * Abort the current SCSI command(s).
 769  */
 770 static int
 771 ahd_linux_abort(struct scsi_cmnd *cmd)
 772 {
 773         int error;
 774
 775         error = ahd_linux_queue_abort_cmd(cmd);
 776
 777         return error;
 778 }
 779
 780 /*
 781  * Attempt to send a target reset message to the device that timed out.
 782  */
 783 static int
 784 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
 785 {
 786         struct ahd_softc *ahd;
 787         struct ahd_linux_device *dev;
 788         struct scb *reset_scb;
 789         u_int  cdb_byte;
 790         int    retval = SUCCESS;
 791         int    paused;
 792         int    wait;
 793         struct  ahd_initiator_tinfo *tinfo;
 794         struct  ahd_tmode_tstate *tstate;
 795         unsigned long flags;
 796         DECLARE_COMPLETION_ONSTACK(done);
 797
 798         reset_scb = NULL;
 799         paused = FALSE;
 800         wait = FALSE;
 801         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 802
 803         scmd_printk(KERN_INFO, cmd,
 804                     "Attempting to queue a TARGET RESET message:");
 805
 806         printf("CDB:");
 807         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
 808                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
 809         printf("\n");
 810
 811         /*
 812          * Determine if we currently own this command.
 813          */
 814         dev = scsi_transport_device_data(cmd->device);
 815
 816         if (dev == NULL) {
 817                 /*
 818                  * No target device for this command exists,
 819                  * so we must not still own the command.
 820                  */
 821                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
 822                 return SUCCESS;
 823         }
 824
 825         /*
 826          * Generate us a new SCB
 827          */
 828         reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
 829         if (!reset_scb) {
 830                 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
 831                 return FAILED;
 832         }
 833
 834         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 835                                     cmd->device->id, &tstate);
 836         reset_scb->io_ctx = cmd;
 837         reset_scb->platform_data->dev = dev;
 838         reset_scb->sg_count = 0;
 839         ahd_set_residual(reset_scb, 0);
 840         ahd_set_sense_residual(reset_scb, 0);
 841         reset_scb->platform_data->xfer_len = 0;
 842         reset_scb->hscb->control = 0;
 843         reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
 844         reset_scb->hscb->lun = cmd->device->lun;
 845         reset_scb->hscb->cdb_len = 0;
 846         reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
 847         reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
 848         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 849                 reset_scb->flags |= SCB_PACKETIZED;
 850         } else {
 851                 reset_scb->hscb->control |= MK_MESSAGE;
 852         }
 853         dev->openings--;
 854         dev->active++;
 855         dev->commands_issued++;
 856
 857         ahd_lock(ahd, &flags);
 858
 859         LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
 860         ahd_queue_scb(ahd, reset_scb);
 861
 862         ahd->platform_data->eh_done = &done;
 863         ahd_unlock(ahd, &flags);
 864
 865         printf("%s: Device reset code sleeping\n", ahd_name(ahd));
 866         if (!wait_for_completion_timeout(&done, 5 * HZ)) {
 867                 ahd_lock(ahd, &flags);
 868                 ahd->platform_data->eh_done = NULL;
 869                 ahd_unlock(ahd, &flags);
 870                 printf("%s: Device reset timer expired (active %d)\n",
 871                        ahd_name(ahd), dev->active);
 872                 retval = FAILED;
 873         }
 874         printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
 875
 876         return (retval);
 877 }
 878
 879 /*
 880  * Reset the SCSI bus.
 881  */
 882 static int
 883 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 884 {
 885         struct ahd_softc *ahd;
 886         int    found;
 887         unsigned long flags;
 888
 889         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 890 #ifdef AHD_DEBUG
 891         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 892                 printf("%s: Bus reset called for cmd %p\n",
 893                        ahd_name(ahd), cmd);
 894 #endif
 895         ahd_lock(ahd, &flags);
 896
 897         found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 898                                   /*initiate reset*/TRUE);
 899         ahd_unlock(ahd, &flags);
 900
 901         if (bootverbose)
 902                 printf("%s: SCSI bus reset delivered. "
 903                        "%d SCBs aborted.\n", ahd_name(ahd), found);
 904
 905         return (SUCCESS);
 906 }
 907
 908 struct scsi_host_template aic79xx_driver_template = {
 909         .module                 = THIS_MODULE,
 910         .name                   = "aic79xx",
 911         .proc_name              = "aic79xx",
 912         .proc_info              = ahd_linux_proc_info,
 913         .info                   = ahd_linux_info,
 914         .queuecommand           = ahd_linux_queue,
 915         .eh_abort_handler       = ahd_linux_abort,
 916         .eh_device_reset_handler = ahd_linux_dev_reset,
 917         .eh_bus_reset_handler   = ahd_linux_bus_reset,
 918 #if defined(__i386__)
 919         .bios_param             = ahd_linux_biosparam,
 920 #endif
 921         .can_queue              = AHD_MAX_QUEUE,
 922         .this_id                = -1,
 923         .max_sectors            = 8192,
 924         .cmd_per_lun            = 2,
 925         .use_clustering         = ENABLE_CLUSTERING,
 926         .slave_alloc            = ahd_linux_slave_alloc,
 927         .slave_configure        = ahd_linux_slave_configure,
 928         .target_alloc           = ahd_linux_target_alloc,
 929         .target_destroy         = ahd_linux_target_destroy,
 930 };
 931
 932 /******************************** Bus DMA *************************************/
 933 int
 934 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
 935                    bus_size_t alignment, bus_size_t boundary,
 936                    dma_addr_t lowaddr, dma_addr_t highaddr,
 937                    bus_dma_filter_t *filter, void *filterarg,
 938                    bus_size_t maxsize, int nsegments,
 939                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
 940 {
 941         bus_dma_tag_t dmat;
 942
 943         dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
 944         if (dmat == NULL)
 945                 return (ENOMEM);
 946
 947         /*
 948          * Linux is very simplistic about DMA memory.  For now don't
 949          * maintain all specification information.  Once Linux supplies
 950          * better facilities for doing these operations, or the
 951          * needs of this particular driver change, we might need to do
 952          * more here.
 953          */
 954         dmat->alignment = alignment;
 955         dmat->boundary = boundary;
 956         dmat->maxsize = maxsize;
 957         *ret_tag = dmat;
 958         return (0);
 959 }
 960
 961 void
 962 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
 963 {
 964         free(dmat, M_DEVBUF);
 965 }
 966
 967 int
 968 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
 969                  int flags, bus_dmamap_t *mapp)
 970 {
 971         *vaddr = pci_alloc_consistent(ahd->dev_softc,
 972                                       dmat->maxsize, mapp);
 973         if (*vaddr == NULL)
 974                 return (ENOMEM);
 975         return(0);
 976 }
 977
 978 void
 979 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
 980                 void* vaddr, bus_dmamap_t map)
 981 {
 982         pci_free_consistent(ahd->dev_softc, dmat->maxsize,
 983                             vaddr, map);
 984 }
 985
 986 int
 987 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
 988                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
 989                 void *cb_arg, int flags)
 990 {
 991         /*
 992          * Assume for now that this will only be used during
 993          * initialization and not for per-transaction buffer mapping.
 994          */
 995         bus_dma_segment_t stack_sg;
 996
 997         stack_sg.ds_addr = map;
 998         stack_sg.ds_len = dmat->maxsize;
 999         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
1000         return (0);
1001 }
1002
1003 void
1004 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1005 {
1006 }
1007
1008 int
1009 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1010 {
1011         /* Nothing to do */
1012         return (0);
1013 }
1014
1015 /********************* Platform Dependent Functions ***************************/
1016 static void
1017 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1018 {
1019
1020         if ((instance >= 0)
1021          && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1022                 uint8_t *iocell_info;
1023
1024                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1025                 iocell_info[index] = value & 0xFFFF;
1026                 if (bootverbose)
1027                         printf("iocell[%d:%ld] = %d\n", instance, index, value);
1028         }
1029 }
1030
1031 static void
1032 ahd_linux_setup_tag_info_global(char *p)
1033 {
1034         int tags, i, j;
1035
1036         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1037         printf("Setting Global Tags= %d\n", tags);
1038
1039         for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1040                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1041                         aic79xx_tag_info[i].tag_commands[j] = tags;
1042                 }
1043         }
1044 }
1045
1046 static void
1047 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1048 {
1049
1050         if ((instance >= 0) && (targ >= 0)
1051          && (instance < ARRAY_SIZE(aic79xx_tag_info))
1052          && (targ < AHD_NUM_TARGETS)) {
1053                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1054                 if (bootverbose)
1055                         printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1056         }
1057 }
1058
1059 static char *
1060 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1061                        void (*callback)(u_long, int, int, int32_t),
1062                        u_long callback_arg)
1063 {
1064         char    *tok_end;
1065         char    *tok_end2;
1066         int      i;
1067         int      instance;
1068         int      targ;
1069         int      done;
1070         char     tok_list[] = {'.', ',', '{', '}', '\0'};
1071
1072         /* All options use a ':' name/arg separator */
1073         if (*opt_arg != ':')
1074                 return (opt_arg);
1075         opt_arg++;
1076         instance = -1;
1077         targ = -1;
1078         done = FALSE;
1079         /*
1080          * Restore separator that may be in
1081          * the middle of our option argument.
1082          */
1083         tok_end = strchr(opt_arg, '\0');
1084         if (tok_end < end)
1085                 *tok_end = ',';
1086         while (!done) {
1087                 switch (*opt_arg) {
1088                 case '{':
1089                         if (instance == -1) {
1090                                 instance = 0;
1091                         } else {
1092                                 if (depth > 1) {
1093                                         if (targ == -1)
1094                                                 targ = 0;
1095                                 } else {
1096                                         printf("Malformed Option %s\n",
1097                                                opt_name);
1098                                         done = TRUE;
1099                                 }
1100                         }
1101                         opt_arg++;
1102                         break;
1103                 case '}':
1104                         if (targ != -1)
1105                                 targ = -1;
1106                         else if (instance != -1)
1107                                 instance = -1;
1108                         opt_arg++;
1109                         break;
1110                 case ',':
1111                 case '.':
1112                         if (instance == -1)
1113                                 done = TRUE;
1114                         else if (targ >= 0)
1115                                 targ++;
1116                         else if (instance >= 0)
1117                                 instance++;
1118                         opt_arg++;
1119                         break;
1120                 case '\0':
1121                         done = TRUE;
1122                         break;
1123                 default:
1124                         tok_end = end;
1125                         for (i = 0; tok_list[i]; i++) {
1126                                 tok_end2 = strchr(opt_arg, tok_list[i]);
1127                                 if ((tok_end2) && (tok_end2 < tok_end))
1128                                         tok_end = tok_end2;
1129                         }
1130                         callback(callback_arg, instance, targ,
1131                                  simple_strtol(opt_arg, NULL, 0));
1132                         opt_arg = tok_end;
1133                         break;
1134                 }
1135         }
1136         return (opt_arg);
1137 }
1138
1139 /*
1140  * Handle Linux boot parameters. This routine allows for assigning a value
1141  * to a parameter with a ':' between the parameter and the value.
1142  * ie. aic79xx=stpwlev:1,extended
1143  */
1144 static int
1145 aic79xx_setup(char *s)
1146 {
1147         int     i, n;
1148         char   *p;
1149         char   *end;
1150
1151         static struct {
1152                 const char *name;
1153                 uint32_t *flag;
1154         } options[] = {
1155                 { "extended", &aic79xx_extended },
1156                 { "no_reset", &aic79xx_no_reset },
1157                 { "verbose", &aic79xx_verbose },
1158                 { "allow_memio", &aic79xx_allow_memio},
1159 #ifdef AHD_DEBUG
1160                 { "debug", &ahd_debug },
1161 #endif
1162                 { "periodic_otag", &aic79xx_periodic_otag },
1163                 { "pci_parity", &aic79xx_pci_parity },
1164                 { "seltime", &aic79xx_seltime },
1165                 { "tag_info", NULL },
1166                 { "global_tag_depth", NULL},
1167                 { "slewrate", NULL },
1168                 { "precomp", NULL },
1169                 { "amplitude", NULL },
1170                 { "slowcrc", &aic79xx_slowcrc },
1171         };
1172
1173         end = strchr(s, '\0');
1174
1175         /*
1176          * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1177          * will never be 0 in this case.
1178          */
1179         n = 0;
1180
1181         while ((p = strsep(&s, ",.")) != NULL) {
1182                 if (*p == '\0')
1183                         continue;
1184                 for (i = 0; i < ARRAY_SIZE(options); i++) {
1185
1186                         n = strlen(options[i].name);
1187                         if (strncmp(options[i].name, p, n) == 0)
1188                                 break;
1189                 }
1190                 if (i == ARRAY_SIZE(options))
1191                         continue;
1192
1193                 if (strncmp(p, "global_tag_depth", n) == 0) {
1194                         ahd_linux_setup_tag_info_global(p + n);
1195                 } else if (strncmp(p, "tag_info", n) == 0) {
1196                         s = ahd_parse_brace_option("tag_info", p + n, end,
1197                             2, ahd_linux_setup_tag_info, 0);
1198                 } else if (strncmp(p, "slewrate", n) == 0) {
1199                         s = ahd_parse_brace_option("slewrate",
1200                             p + n, end, 1, ahd_linux_setup_iocell_info,
1201                             AIC79XX_SLEWRATE_INDEX);
1202                 } else if (strncmp(p, "precomp", n) == 0) {
1203                         s = ahd_parse_brace_option("precomp",
1204                             p + n, end, 1, ahd_linux_setup_iocell_info,
1205                             AIC79XX_PRECOMP_INDEX);
1206                 } else if (strncmp(p, "amplitude", n) == 0) {
1207                         s = ahd_parse_brace_option("amplitude",
1208                             p + n, end, 1, ahd_linux_setup_iocell_info,
1209                             AIC79XX_AMPLITUDE_INDEX);
1210                 } else if (p[n] == ':') {
1211                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1212                 } else if (!strncmp(p, "verbose", n)) {
1213                         *(options[i].flag) = 1;
1214                 } else {
1215                         *(options[i].flag) ^= 0xFFFFFFFF;
1216                 }
1217         }
1218         return 1;
1219 }
1220
1221 __setup("aic79xx=", aic79xx_setup);
1222
1223 uint32_t aic79xx_verbose;
1224
1225 int
1226 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1227 {
1228         char    buf[80];
1229         struct  Scsi_Host *host;
1230         char    *new_name;
1231         u_long  s;
1232         int     retval;
1233
1234         template->name = ahd->description;
1235         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1236         if (host == NULL)
1237                 return (ENOMEM);
1238
1239         *((struct ahd_softc **)host->hostdata) = ahd;
1240         ahd->platform_data->host = host;
1241         host->can_queue = AHD_MAX_QUEUE;
1242         host->cmd_per_lun = 2;
1243         host->sg_tablesize = AHD_NSEG;
1244         host->this_id = ahd->our_id;
1245         host->irq = ahd->platform_data->irq;
1246         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1247         host->max_lun = AHD_NUM_LUNS;
1248         host->max_channel = 0;
1249         host->sg_tablesize = AHD_NSEG;
1250         ahd_lock(ahd, &s);
1251         ahd_set_unit(ahd, ahd_linux_unit++);
1252         ahd_unlock(ahd, &s);
1253         sprintf(buf, "scsi%d", host->host_no);
1254         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1255         if (new_name != NULL) {
1256                 strcpy(new_name, buf);
1257                 ahd_set_name(ahd, new_name);
1258         }
1259         host->unique_id = ahd->unit;
1260         ahd_linux_initialize_scsi_bus(ahd);
1261         ahd_intr_enable(ahd, TRUE);
1262
1263         host->transportt = ahd_linux_transport_template;
1264
1265         retval = scsi_add_host(host, &ahd->dev_softc->dev);
1266         if (retval) {
1267                 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1268                 scsi_host_put(host);
1269                 return retval;
1270         }
1271
1272         scsi_scan_host(host);
1273         return 0;
1274 }
1275
1276 /*
1277  * Place the SCSI bus into a known state by either resetting it,
1278  * or forcing transfer negotiations on the next command to any
1279  * target.
1280  */
1281 static void
1282 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1283 {
1284         u_int target_id;
1285         u_int numtarg;
1286         unsigned long s;
1287
1288         target_id = 0;
1289         numtarg = 0;
1290
1291         if (aic79xx_no_reset != 0)
1292                 ahd->flags &= ~AHD_RESET_BUS_A;
1293
1294         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1295                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1296         else
1297                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1298
1299         ahd_lock(ahd, &s);
1300
1301         /*
1302          * Force negotiation to async for all targets that
1303          * will not see an initial bus reset.
1304          */
1305         for (; target_id < numtarg; target_id++) {
1306                 struct ahd_devinfo devinfo;
1307                 struct ahd_initiator_tinfo *tinfo;
1308                 struct ahd_tmode_tstate *tstate;
1309
1310                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1311                                             target_id, &tstate);
1312                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1313                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1314                 ahd_update_neg_request(ahd, &devinfo, tstate,
1315                                        tinfo, AHD_NEG_ALWAYS);
1316         }
1317         ahd_unlock(ahd, &s);
1318         /* Give the bus some time to recover */
1319         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1320                 ahd_freeze_simq(ahd);
1321                 msleep(AIC79XX_RESET_DELAY);
1322                 ahd_release_simq(ahd);
1323         }
1324 }
1325
1326 int
1327 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1328 {
1329         ahd->platform_data =
1330             malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1331         if (ahd->platform_data == NULL)
1332                 return (ENOMEM);
1333         memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1334         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1335         ahd_lockinit(ahd);
1336         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1337         return (0);
1338 }
1339
1340 void
1341 ahd_platform_free(struct ahd_softc *ahd)
1342 {
1343         struct scsi_target *starget;
1344         int i;
1345
1346         if (ahd->platform_data != NULL) {
1347                 /* destroy all of the device and target objects */
1348                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1349                         starget = ahd->platform_data->starget[i];
1350                         if (starget != NULL) {
1351                                 ahd->platform_data->starget[i] = NULL;
1352                         }
1353                 }
1354
1355                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1356                         free_irq(ahd->platform_data->irq, ahd);
1357                 if (ahd->tags[0] == BUS_SPACE_PIO
1358                  && ahd->bshs[0].ioport != 0)
1359                         release_region(ahd->bshs[0].ioport, 256);
1360                 if (ahd->tags[1] == BUS_SPACE_PIO
1361                  && ahd->bshs[1].ioport != 0)
1362                         release_region(ahd->bshs[1].ioport, 256);
1363                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1364                  && ahd->bshs[0].maddr != NULL) {
1365                         iounmap(ahd->bshs[0].maddr);
1366                         release_mem_region(ahd->platform_data->mem_busaddr,
1367                                            0x1000);
1368                 }
1369                 if (ahd->platform_data->host)
1370                         scsi_host_put(ahd->platform_data->host);
1371
1372                 free(ahd->platform_data, M_DEVBUF);
1373         }
1374 }
1375
1376 void
1377 ahd_platform_init(struct ahd_softc *ahd)
1378 {
1379         /*
1380          * Lookup and commit any modified IO Cell options.
1381          */
1382         if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1383                 struct ahd_linux_iocell_opts *iocell_opts;
1384
1385                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1386                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1387                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1388                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1389                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1390                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1391                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1392         }
1393
1394 }
1395
1396 void
1397 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1398 {
1399         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1400                                 SCB_GET_CHANNEL(ahd, scb),
1401                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1402                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1403 }
1404
1405 void
1406 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1407                       struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1408 {
1409         struct ahd_linux_device *dev;
1410         int was_queuing;
1411         int now_queuing;
1412
1413         if (sdev == NULL)
1414                 return;
1415
1416         dev = scsi_transport_device_data(sdev);
1417
1418         if (dev == NULL)
1419                 return;
1420         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1421         switch (alg) {
1422         default:
1423         case AHD_QUEUE_NONE:
1424                 now_queuing = 0;
1425                 break;
1426         case AHD_QUEUE_BASIC:
1427                 now_queuing = AHD_DEV_Q_BASIC;
1428                 break;
1429         case AHD_QUEUE_TAGGED:
1430                 now_queuing = AHD_DEV_Q_TAGGED;
1431                 break;
1432         }
1433         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1434          && (was_queuing != now_queuing)
1435          && (dev->active != 0)) {
1436                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1437                 dev->qfrozen++;
1438         }
1439
1440         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1441         if (now_queuing) {
1442                 u_int usertags;
1443
1444                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1445                 if (!was_queuing) {
1446                         /*
1447                          * Start out agressively and allow our
1448                          * dynamic queue depth algorithm to take
1449                          * care of the rest.
1450                          */
1451                         dev->maxtags = usertags;
1452                         dev->openings = dev->maxtags - dev->active;
1453                 }
1454                 if (dev->maxtags == 0) {
1455                         /*
1456                          * Queueing is disabled by the user.
1457                          */
1458                         dev->openings = 1;
1459                 } else if (alg == AHD_QUEUE_TAGGED) {
1460                         dev->flags |= AHD_DEV_Q_TAGGED;
1461                         if (aic79xx_periodic_otag != 0)
1462                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1463                 } else
1464                         dev->flags |= AHD_DEV_Q_BASIC;
1465         } else {
1466                 /* We can only have one opening. */
1467                 dev->maxtags = 0;
1468                 dev->openings =  1 - dev->active;
1469         }
1470
1471         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1472         case AHD_DEV_Q_BASIC:
1473                 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1474                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1475                 break;
1476         case AHD_DEV_Q_TAGGED:
1477                 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1478                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1479                 break;
1480         default:
1481                 /*
1482                  * We allow the OS to queue 2 untagged transactions to
1483                  * us at any time even though we can only execute them
1484                  * serially on the controller/device.  This should
1485                  * remove some latency.
1486                  */
1487                 scsi_deactivate_tcq(sdev, 1);
1488                 break;
1489         }
1490 }
1491
1492 int
1493 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1494                         int lun, u_int tag, role_t role, uint32_t status)
1495 {
1496         return 0;
1497 }
1498
1499 static u_int
1500 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1501 {
1502         static int warned_user;
1503         u_int tags;
1504
1505         tags = 0;
1506         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1507                 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1508
1509                         if (warned_user == 0) {
1510                                 printf(KERN_WARNING
1511 "aic79xx: WARNING: Insufficient tag_info instances\n"
1512 "aic79xx: for installed controllers.  Using defaults\n"
1513 "aic79xx: Please update the aic79xx_tag_info array in\n"
1514 "aic79xx: the aic79xx_osm.c source file.\n");
1515                                 warned_user++;
1516                         }
1517                         tags = AHD_MAX_QUEUE;
1518                 } else {
1519                         adapter_tag_info_t *tag_info;
1520
1521                         tag_info = &aic79xx_tag_info[ahd->unit];
1522                         tags = tag_info->tag_commands[devinfo->target_offset];
1523                         if (tags > AHD_MAX_QUEUE)
1524                                 tags = AHD_MAX_QUEUE;
1525                 }
1526         }
1527         return (tags);
1528 }
1529
1530 /*
1531  * Determines the queue depth for a given device.
1532  */
1533 static void
1534 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1535 {
1536         struct  ahd_devinfo devinfo;
1537         u_int   tags;
1538         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1539
1540         ahd_compile_devinfo(&devinfo,
1541                             ahd->our_id,
1542                             sdev->sdev_target->id, sdev->lun,
1543                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1544                             ROLE_INITIATOR);
1545         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1546         if (tags != 0 && sdev->tagged_supported != 0) {
1547
1548                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1549                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1550                                devinfo.lun, AC_TRANSFER_NEG);
1551                 ahd_print_devinfo(ahd, &devinfo);
1552                 printf("Tagged Queuing enabled.  Depth %d\n", tags);
1553         } else {
1554                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1555                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1556                                devinfo.lun, AC_TRANSFER_NEG);
1557         }
1558 }
1559
1560 static int
1561 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1562                       struct scsi_cmnd *cmd)
1563 {
1564         struct   scb *scb;
1565         struct   hardware_scb *hscb;
1566         struct   ahd_initiator_tinfo *tinfo;
1567         struct   ahd_tmode_tstate *tstate;
1568         u_int    col_idx;
1569         uint16_t mask;
1570         unsigned long flags;
1571         int nseg;
1572
1573         nseg = scsi_dma_map(cmd);
1574         if (nseg < 0)
1575                 return SCSI_MLQUEUE_HOST_BUSY;
1576
1577         ahd_lock(ahd, &flags);
1578
1579         /*
1580          * Get an scb to use.
1581          */
1582         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1583                                     cmd->device->id, &tstate);
1584         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1585          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1586                 col_idx = AHD_NEVER_COL_IDX;
1587         } else {
1588                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1589                                             cmd->device->lun);
1590         }
1591         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1592                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1593                 ahd_unlock(ahd, &flags);
1594                 scsi_dma_unmap(cmd);
1595                 return SCSI_MLQUEUE_HOST_BUSY;
1596         }
1597
1598         scb->io_ctx = cmd;
1599         scb->platform_data->dev = dev;
1600         hscb = scb->hscb;
1601         cmd->host_scribble = (char *)scb;
1602
1603         /*
1604          * Fill out basics of the HSCB.
1605          */
1606         hscb->control = 0;
1607         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1608         hscb->lun = cmd->device->lun;
1609         scb->hscb->task_management = 0;
1610         mask = SCB_GET_TARGET_MASK(ahd, scb);
1611
1612         if ((ahd->user_discenable & mask) != 0)
1613                 hscb->control |= DISCENB;
1614
1615         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1616                 scb->flags |= SCB_PACKETIZED;
1617
1618         if ((tstate->auto_negotiate & mask) != 0) {
1619                 scb->flags |= SCB_AUTO_NEGOTIATE;
1620                 scb->hscb->control |= MK_MESSAGE;
1621         }
1622
1623         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1624                 int     msg_bytes;
1625                 uint8_t tag_msgs[2];
1626
1627                 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1628                 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1629                         hscb->control |= tag_msgs[0];
1630                         if (tag_msgs[0] == MSG_ORDERED_TASK)
1631                                 dev->commands_since_idle_or_otag = 0;
1632                 } else
1633                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1634                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1635                         hscb->control |= MSG_ORDERED_TASK;
1636                         dev->commands_since_idle_or_otag = 0;
1637                 } else {
1638                         hscb->control |= MSG_SIMPLE_TASK;
1639                 }
1640         }
1641
1642         hscb->cdb_len = cmd->cmd_len;
1643         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1644
1645         scb->platform_data->xfer_len = 0;
1646         ahd_set_residual(scb, 0);
1647         ahd_set_sense_residual(scb, 0);
1648         scb->sg_count = 0;
1649
1650         if (nseg > 0) {
1651                 void *sg = scb->sg_list;
1652                 struct scatterlist *cur_seg;
1653                 int i;
1654
1655                 scb->platform_data->xfer_len = 0;
1656
1657                 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1658                         dma_addr_t addr;
1659                         bus_size_t len;
1660
1661                         addr = sg_dma_address(cur_seg);
1662                         len = sg_dma_len(cur_seg);
1663                         scb->platform_data->xfer_len += len;
1664                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1665                                           i == (nseg - 1));
1666                 }
1667         }
1668
1669         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1670         dev->openings--;
1671         dev->active++;
1672         dev->commands_issued++;
1673
1674         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1675                 dev->commands_since_idle_or_otag++;
1676         scb->flags |= SCB_ACTIVE;
1677         ahd_queue_scb(ahd, scb);
1678
1679         ahd_unlock(ahd, &flags);
1680
1681         return 0;
1682 }
1683
1684 /*
1685  * SCSI controller interrupt handler.
1686  */
1687 irqreturn_t
1688 ahd_linux_isr(int irq, void *dev_id)
1689 {
1690         struct  ahd_softc *ahd;
1691         u_long  flags;
1692         int     ours;
1693
1694         ahd = (struct ahd_softc *) dev_id;
1695         ahd_lock(ahd, &flags);
1696         ours = ahd_intr(ahd);
1697         ahd_unlock(ahd, &flags);
1698         return IRQ_RETVAL(ours);
1699 }
1700
1701 void
1702 ahd_send_async(struct ahd_softc *ahd, char channel,
1703                u_int target, u_int lun, ac_code code)
1704 {
1705         switch (code) {
1706         case AC_TRANSFER_NEG:
1707         {
1708                 char    buf[80];
1709                 struct  scsi_target *starget;
1710                 struct  info_str info;
1711                 struct  ahd_initiator_tinfo *tinfo;
1712                 struct  ahd_tmode_tstate *tstate;
1713                 unsigned int target_ppr_options;
1714
1715                 BUG_ON(target == CAM_TARGET_WILDCARD);
1716
1717                 info.buffer = buf;
1718                 info.length = sizeof(buf);
1719                 info.offset = 0;
1720                 info.pos = 0;
1721                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1722                                             target, &tstate);
1723
1724                 /*
1725                  * Don't bother reporting results while
1726                  * negotiations are still pending.
1727                  */
1728                 if (tinfo->curr.period != tinfo->goal.period
1729                  || tinfo->curr.width != tinfo->goal.width
1730                  || tinfo->curr.offset != tinfo->goal.offset
1731                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1732                         if (bootverbose == 0)
1733                                 break;
1734
1735                 /*
1736                  * Don't bother reporting results that
1737                  * are identical to those last reported.
1738                  */
1739                 starget = ahd->platform_data->starget[target];
1740                 if (starget == NULL)
1741                         break;
1742
1743                 target_ppr_options =
1744                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1745                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1746                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1747                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1748                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1749                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1750                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1751                         + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1752
1753                 if (tinfo->curr.period == spi_period(starget)
1754                     && tinfo->curr.width == spi_width(starget)
1755                     && tinfo->curr.offset == spi_offset(starget)
1756                  && tinfo->curr.ppr_options == target_ppr_options)
1757                         if (bootverbose == 0)
1758                                 break;
1759
1760                 spi_period(starget) = tinfo->curr.period;
1761                 spi_width(starget) = tinfo->curr.width;
1762                 spi_offset(starget) = tinfo->curr.offset;
1763                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1764                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1765                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1766                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1767                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1768                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1769                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1770                 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1771                 spi_display_xfer_agreement(starget);
1772                 break;
1773         }
1774         case AC_SENT_BDR:
1775         {
1776                 WARN_ON(lun != CAM_LUN_WILDCARD);
1777                 scsi_report_device_reset(ahd->platform_data->host,
1778                                          channel - 'A', target);
1779                 break;
1780         }
1781         case AC_BUS_RESET:
1782                 if (ahd->platform_data->host != NULL) {
1783                         scsi_report_bus_reset(ahd->platform_data->host,
1784                                               channel - 'A');
1785                 }
1786                 break;
1787         default:
1788                 panic("ahd_send_async: Unexpected async event");
1789         }
1790 }
1791
1792 /*
1793  * Calls the higher level scsi done function and frees the scb.
1794  */
1795 void
1796 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1797 {
1798         struct scsi_cmnd *cmd;
1799         struct    ahd_linux_device *dev;
1800
1801         if ((scb->flags & SCB_ACTIVE) == 0) {
1802                 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1803                 ahd_dump_card_state(ahd);
1804                 panic("Stopping for safety");
1805         }
1806         LIST_REMOVE(scb, pending_links);
1807         cmd = scb->io_ctx;
1808         dev = scb->platform_data->dev;
1809         dev->active--;
1810         dev->openings++;
1811         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1812                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1813                 dev->qfrozen--;
1814         }
1815         ahd_linux_unmap_scb(ahd, scb);
1816
1817         /*
1818          * Guard against stale sense data.
1819          * The Linux mid-layer assumes that sense
1820          * was retrieved anytime the first byte of
1821          * the sense buffer looks "sane".
1822          */
1823         cmd->sense_buffer[0] = 0;
1824         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1825                 uint32_t amount_xferred;
1826
1827                 amount_xferred =
1828                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1829                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1830 #ifdef AHD_DEBUG
1831                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1832                                 ahd_print_path(ahd, scb);
1833                                 printf("Set CAM_UNCOR_PARITY\n");
1834                         }
1835 #endif
1836                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1837 #ifdef AHD_REPORT_UNDERFLOWS
1838                 /*
1839                  * This code is disabled by default as some
1840                  * clients of the SCSI system do not properly
1841                  * initialize the underflow parameter.  This
1842                  * results in spurious termination of commands
1843                  * that complete as expected (e.g. underflow is
1844                  * allowed as command can return variable amounts
1845                  * of data.
1846                  */
1847                 } else if (amount_xferred < scb->io_ctx->underflow) {
1848                         u_int i;
1849
1850                         ahd_print_path(ahd, scb);
1851                         printf("CDB:");
1852                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1853                                 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1854                         printf("\n");
1855                         ahd_print_path(ahd, scb);
1856                         printf("Saw underflow (%ld of %ld bytes). "
1857                                "Treated as error\n",
1858                                 ahd_get_residual(scb),
1859                                 ahd_get_transfer_length(scb));
1860                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1861 #endif
1862                 } else {
1863                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1864                 }
1865         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1866                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1867         }
1868
1869         if (dev->openings == 1
1870          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1871          && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1872                 dev->tag_success_count++;
1873         /*
1874          * Some devices deal with temporary internal resource
1875          * shortages by returning queue full.  When the queue
1876          * full occurrs, we throttle back.  Slowly try to get
1877          * back to our previous queue depth.
1878          */
1879         if ((dev->openings + dev->active) < dev->maxtags
1880          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1881                 dev->tag_success_count = 0;
1882                 dev->openings++;
1883         }
1884
1885         if (dev->active == 0)
1886                 dev->commands_since_idle_or_otag = 0;
1887
1888         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1889                 printf("Recovery SCB completes\n");
1890                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1891                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1892                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1893
1894                 if (ahd->platform_data->eh_done)
1895                         complete(ahd->platform_data->eh_done);
1896         }
1897
1898         ahd_free_scb(ahd, scb);
1899         ahd_linux_queue_cmd_complete(ahd, cmd);
1900 }
1901
1902 static void
1903 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1904                              struct scsi_device *sdev, struct scb *scb)
1905 {
1906         struct  ahd_devinfo devinfo;
1907         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1908
1909         ahd_compile_devinfo(&devinfo,
1910                             ahd->our_id,
1911                             sdev->sdev_target->id, sdev->lun,
1912                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1913                             ROLE_INITIATOR);
1914
1915         /*
1916          * We don't currently trust the mid-layer to
1917          * properly deal with queue full or busy.  So,
1918          * when one occurs, we tell the mid-layer to
1919          * unconditionally requeue the command to us
1920          * so that we can retry it ourselves.  We also
1921          * implement our own throttling mechanism so
1922          * we don't clobber the device with too many
1923          * commands.
1924          */
1925         switch (ahd_get_scsi_status(scb)) {
1926         default:
1927                 break;
1928         case SCSI_STATUS_CHECK_COND:
1929         case SCSI_STATUS_CMD_TERMINATED:
1930         {
1931                 struct scsi_cmnd *cmd;
1932
1933                 /*
1934                  * Copy sense information to the OS's cmd
1935                  * structure if it is available.
1936                  */
1937                 cmd = scb->io_ctx;
1938                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1939                         struct scsi_status_iu_header *siu;
1940                         u_int sense_size;
1941                         u_int sense_offset;
1942
1943                         if (scb->flags & SCB_SENSE) {
1944                                 sense_size = min(sizeof(struct scsi_sense_data)
1945                                                - ahd_get_sense_residual(scb),
1946                                                  (u_long)SCSI_SENSE_BUFFERSIZE);
1947                                 sense_offset = 0;
1948                         } else {
1949                                 /*
1950                                  * Copy only the sense data into the provided
1951                                  * buffer.
1952                                  */
1953                                 siu = (struct scsi_status_iu_header *)
1954                                     scb->sense_data;
1955                                 sense_size = min_t(size_t,
1956                                                 scsi_4btoul(siu->sense_length),
1957                                                 SCSI_SENSE_BUFFERSIZE);
1958                                 sense_offset = SIU_SENSE_OFFSET(siu);
1959                         }
1960
1961                         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1962                         memcpy(cmd->sense_buffer,
1963                                ahd_get_sense_buf(ahd, scb)
1964                                + sense_offset, sense_size);
1965                         cmd->result |= (DRIVER_SENSE << 24);
1966
1967 #ifdef AHD_DEBUG
1968                         if (ahd_debug & AHD_SHOW_SENSE) {
1969                                 int i;
1970
1971                                 printf("Copied %d bytes of sense data at %d:",
1972                                        sense_size, sense_offset);
1973                                 for (i = 0; i < sense_size; i++) {
1974                                         if ((i & 0xF) == 0)
1975                                                 printf("\n");
1976                                         printf("0x%x ", cmd->sense_buffer[i]);
1977                                 }
1978                                 printf("\n");
1979                         }
1980 #endif
1981                 }
1982                 break;
1983         }
1984         case SCSI_STATUS_QUEUE_FULL:
1985                 /*
1986                  * By the time the core driver has returned this
1987                  * command, all other commands that were queued
1988                  * to us but not the device have been returned.
1989                  * This ensures that dev->active is equal to
1990                  * the number of commands actually queued to
1991                  * the device.
1992                  */
1993                 dev->tag_success_count = 0;
1994                 if (dev->active != 0) {
1995                         /*
1996                          * Drop our opening count to the number
1997                          * of commands currently outstanding.
1998                          */
1999                         dev->openings = 0;
2000 #ifdef AHD_DEBUG
2001                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
2002                                 ahd_print_path(ahd, scb);
2003                                 printf("Dropping tag count to %d\n",
2004                                        dev->active);
2005                         }
2006 #endif
2007                         if (dev->active == dev->tags_on_last_queuefull) {
2008
2009                                 dev->last_queuefull_same_count++;
2010                                 /*
2011                                  * If we repeatedly see a queue full
2012                                  * at the same queue depth, this
2013                                  * device has a fixed number of tag
2014                                  * slots.  Lock in this tag depth
2015                                  * so we stop seeing queue fulls from
2016                                  * this device.
2017                                  */
2018                                 if (dev->last_queuefull_same_count
2019                                  == AHD_LOCK_TAGS_COUNT) {
2020                                         dev->maxtags = dev->active;
2021                                         ahd_print_path(ahd, scb);
2022                                         printf("Locking max tag count at %d\n",
2023                                                dev->active);
2024                                 }
2025                         } else {
2026                                 dev->tags_on_last_queuefull = dev->active;
2027                                 dev->last_queuefull_same_count = 0;
2028                         }
2029                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2030                         ahd_set_scsi_status(scb, SCSI_STATUS_OK);
2031                         ahd_platform_set_tags(ahd, sdev, &devinfo,
2032                                      (dev->flags & AHD_DEV_Q_BASIC)
2033                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2034                         break;
2035                 }
2036                 /*
2037                  * Drop down to a single opening, and treat this
2038                  * as if the target returned BUSY SCSI status.
2039                  */
2040                 dev->openings = 1;
2041                 ahd_platform_set_tags(ahd, sdev, &devinfo,
2042                              (dev->flags & AHD_DEV_Q_BASIC)
2043                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2044                 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2045         }
2046 }
2047
2048 static void
2049 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2050 {
2051         int status;
2052         int new_status = DID_OK;
2053         int do_fallback = 0;
2054         int scsi_status;
2055
2056         /*
2057          * Map CAM error codes into Linux Error codes.  We
2058          * avoid the conversion so that the DV code has the
2059          * full error information available when making
2060          * state change decisions.
2061          */
2062
2063         status = ahd_cmd_get_transaction_status(cmd);
2064         switch (status) {
2065         case CAM_REQ_INPROG:
2066         case CAM_REQ_CMP:
2067                 new_status = DID_OK;
2068                 break;
2069         case CAM_AUTOSENSE_FAIL:
2070                 new_status = DID_ERROR;
2071                 /* Fallthrough */
2072         case CAM_SCSI_STATUS_ERROR:
2073                 scsi_status = ahd_cmd_get_scsi_status(cmd);
2074
2075                 switch(scsi_status) {
2076                 case SCSI_STATUS_CMD_TERMINATED:
2077                 case SCSI_STATUS_CHECK_COND:
2078                         if ((cmd->result >> 24) != DRIVER_SENSE) {
2079                                 do_fallback = 1;
2080                         } else {
2081                                 struct scsi_sense_data *sense;
2082
2083                                 sense = (struct scsi_sense_data *)
2084                                         cmd->sense_buffer;
2085                                 if (sense->extra_len >= 5 &&
2086                                     (sense->add_sense_code == 0x47
2087                                      || sense->add_sense_code == 0x48))
2088                                         do_fallback = 1;
2089                         }
2090                         break;
2091                 default:
2092                         break;
2093                 }
2094                 break;
2095         case CAM_REQ_ABORTED:
2096                 new_status = DID_ABORT;
2097                 break;
2098         case CAM_BUSY:
2099                 new_status = DID_BUS_BUSY;
2100                 break;
2101         case CAM_REQ_INVALID:
2102         case CAM_PATH_INVALID:
2103                 new_status = DID_BAD_TARGET;
2104                 break;
2105         case CAM_SEL_TIMEOUT:
2106                 new_status = DID_NO_CONNECT;
2107                 break;
2108         case CAM_SCSI_BUS_RESET:
2109         case CAM_BDR_SENT:
2110                 new_status = DID_RESET;
2111                 break;
2112         case CAM_UNCOR_PARITY:
2113                 new_status = DID_PARITY;
2114                 do_fallback = 1;
2115                 break;
2116         case CAM_CMD_TIMEOUT:
2117                 new_status = DID_TIME_OUT;
2118                 do_fallback = 1;
2119                 break;
2120         case CAM_REQ_CMP_ERR:
2121         case CAM_UNEXP_BUSFREE:
2122         case CAM_DATA_RUN_ERR:
2123                 new_status = DID_ERROR;
2124                 do_fallback = 1;
2125                 break;
2126         case CAM_UA_ABORT:
2127         case CAM_NO_HBA:
2128         case CAM_SEQUENCE_FAIL:
2129         case CAM_CCB_LEN_ERR:
2130         case CAM_PROVIDE_FAIL:
2131         case CAM_REQ_TERMIO:
2132         case CAM_UNREC_HBA_ERROR:
2133         case CAM_REQ_TOO_BIG:
2134                 new_status = DID_ERROR;
2135                 break;
2136         case CAM_REQUEUE_REQ:
2137                 new_status = DID_REQUEUE;
2138                 break;
2139         default:
2140                 /* We should never get here */
2141                 new_status = DID_ERROR;
2142                 break;
2143         }
2144
2145         if (do_fallback) {
2146                 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2147                        ahd_name(ahd), status, cmd->device->channel,
2148                        cmd->device->id, cmd->device->lun);
2149         }
2150
2151         ahd_cmd_set_transaction_status(cmd, new_status);
2152
2153         cmd->scsi_done(cmd);
2154 }
2155
2156 static void
2157 ahd_freeze_simq(struct ahd_softc *ahd)
2158 {
2159         scsi_block_requests(ahd->platform_data->host);
2160 }
2161
2162 static void
2163 ahd_release_simq(struct ahd_softc *ahd)
2164 {
2165         scsi_unblock_requests(ahd->platform_data->host);
2166 }
2167
2168 static int
2169 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2170 {
2171         struct ahd_softc *ahd;
2172         struct ahd_linux_device *dev;
2173         struct scb *pending_scb;
2174         u_int  saved_scbptr;
2175         u_int  active_scbptr;
2176         u_int  last_phase;
2177         u_int  saved_scsiid;
2178         u_int  cdb_byte;
2179         int    retval;
2180         int    was_paused;
2181         int    paused;
2182         int    wait;
2183         int    disconnected;
2184         ahd_mode_state saved_modes;
2185         unsigned long flags;
2186
2187         pending_scb = NULL;
2188         paused = FALSE;
2189         wait = FALSE;
2190         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2191
2192         scmd_printk(KERN_INFO, cmd,
2193                     "Attempting to queue an ABORT message:");
2194
2195         printf("CDB:");
2196         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2197                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2198         printf("\n");
2199
2200         ahd_lock(ahd, &flags);
2201
2202         /*
2203          * First determine if we currently own this command.
2204          * Start by searching the device queue.  If not found
2205          * there, check the pending_scb list.  If not found
2206          * at all, and the system wanted us to just abort the
2207          * command, return success.
2208          */
2209         dev = scsi_transport_device_data(cmd->device);
2210
2211         if (dev == NULL) {
2212                 /*
2213                  * No target device for this command exists,
2214                  * so we must not still own the command.
2215                  */
2216                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2217                 retval = SUCCESS;
2218                 goto no_cmd;
2219         }
2220
2221         /*
2222          * See if we can find a matching cmd in the pending list.
2223          */
2224         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2225                 if (pending_scb->io_ctx == cmd)
2226                         break;
2227         }
2228
2229         if (pending_scb == NULL) {
2230                 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2231                 goto no_cmd;
2232         }
2233
2234         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2235                 /*
2236                  * We can't queue two recovery actions using the same SCB
2237                  */
2238                 retval = FAILED;
2239                 goto  done;
2240         }
2241
2242         /*
2243          * Ensure that the card doesn't do anything
2244          * behind our back.  Also make sure that we
2245          * didn't "just" miss an interrupt that would
2246          * affect this cmd.
2247          */
2248         was_paused = ahd_is_paused(ahd);
2249         ahd_pause_and_flushwork(ahd);
2250         paused = TRUE;
2251
2252         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2253                 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2254                 goto no_cmd;
2255         }
2256
2257         printf("%s: At time of recovery, card was %spaused\n",
2258                ahd_name(ahd), was_paused ? "" : "not ");
2259         ahd_dump_card_state(ahd);
2260
2261         disconnected = TRUE;
2262         if (ahd_search_qinfifo(ahd, cmd->device->id,
2263                                cmd->device->channel + 'A',
2264                                cmd->device->lun,
2265                                pending_scb->hscb->tag,
2266                                ROLE_INITIATOR, CAM_REQ_ABORTED,
2267                                SEARCH_COMPLETE) > 0) {
2268                 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2269                        ahd_name(ahd), cmd->device->channel,
2270                        cmd->device->id, cmd->device->lun);
2271                 retval = SUCCESS;
2272                 goto done;
2273         }
2274
2275         saved_modes = ahd_save_modes(ahd);
2276         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2277         last_phase = ahd_inb(ahd, LASTPHASE);
2278         saved_scbptr = ahd_get_scbptr(ahd);
2279         active_scbptr = saved_scbptr;
2280         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2281                 struct scb *bus_scb;
2282
2283                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2284                 if (bus_scb == pending_scb)
2285                         disconnected = FALSE;
2286         }
2287
2288         /*
2289          * At this point, pending_scb is the scb associated with the
2290          * passed in command.  That command is currently active on the
2291          * bus or is in the disconnected state.
2292          */
2293         saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2294         if (last_phase != P_BUSFREE
2295             && SCB_GET_TAG(pending_scb) == active_scbptr) {
2296
2297                 /*
2298                  * We're active on the bus, so assert ATN
2299                  * and hope that the target responds.
2300                  */
2301                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2302                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2303                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2304                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2305                 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2306                 wait = TRUE;
2307         } else if (disconnected) {
2308
2309                 /*
2310                  * Actually re-queue this SCB in an attempt
2311                  * to select the device before it reconnects.
2312                  */
2313                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2314                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2315                 pending_scb->hscb->cdb_len = 0;
2316                 pending_scb->hscb->task_attribute = 0;
2317                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2318
2319                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2320                         /*
2321                          * Mark the SCB has having an outstanding
2322                          * task management function.  Should the command
2323                          * complete normally before the task management
2324                          * function can be sent, the host will be notified
2325                          * to abort our requeued SCB.
2326                          */
2327                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2328                                  pending_scb->hscb->task_management);
2329                 } else {
2330                         /*
2331                          * If non-packetized, set the MK_MESSAGE control
2332                          * bit indicating that we desire to send a message.
2333                          * We also set the disconnected flag since there is
2334                          * no guarantee that our SCB control byte matches
2335                          * the version on the card.  We don't want the
2336                          * sequencer to abort the command thinking an
2337                          * unsolicited reselection occurred.
2338                          */
2339                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2340
2341                         /*
2342                          * The sequencer will never re-reference the
2343                          * in-core SCB.  To make sure we are notified
2344                          * during reslection, set the MK_MESSAGE flag in
2345                          * the card's copy of the SCB.
2346                          */
2347                         ahd_outb(ahd, SCB_CONTROL,
2348                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2349                 }
2350
2351                 /*
2352                  * Clear out any entries in the QINFIFO first
2353                  * so we are the next SCB for this target
2354                  * to run.
2355                  */
2356                 ahd_search_qinfifo(ahd, cmd->device->id,
2357                                    cmd->device->channel + 'A', cmd->device->lun,
2358                                    SCB_LIST_NULL, ROLE_INITIATOR,
2359                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2360                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2361                 ahd_set_scbptr(ahd, saved_scbptr);
2362                 ahd_print_path(ahd, pending_scb);
2363                 printf("Device is disconnected, re-queuing SCB\n");
2364                 wait = TRUE;
2365         } else {
2366                 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2367                 retval = FAILED;
2368                 goto done;
2369         }
2370
2371 no_cmd:
2372         /*
2373          * Our assumption is that if we don't have the command, no
2374          * recovery action was required, so we return success.  Again,
2375          * the semantics of the mid-layer recovery engine are not
2376          * well defined, so this may change in time.
2377          */
2378         retval = SUCCESS;
2379 done:
2380         if (paused)
2381                 ahd_unpause(ahd);
2382         if (wait) {
2383                 DECLARE_COMPLETION_ONSTACK(done);
2384
2385                 ahd->platform_data->eh_done = &done;
2386                 ahd_unlock(ahd, &flags);
2387
2388                 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2389                 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2390                         ahd_lock(ahd, &flags);
2391                         ahd->platform_data->eh_done = NULL;
2392                         ahd_unlock(ahd, &flags);
2393                         printf("%s: Timer Expired (active %d)\n",
2394                                ahd_name(ahd), dev->active);
2395                         retval = FAILED;
2396                 }
2397                 printf("Recovery code awake\n");
2398         } else
2399                 ahd_unlock(ahd, &flags);
2400
2401         if (retval != SUCCESS)
2402                 printf("%s: Command abort returning 0x%x\n",
2403                        ahd_name(ahd), retval);
2404
2405         return retval;
2406 }
2407
2408 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2409 {
2410         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2411         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2412         struct ahd_devinfo devinfo;
2413         unsigned long flags;
2414
2415         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2416                             starget->channel + 'A', ROLE_INITIATOR);
2417         ahd_lock(ahd, &flags);
2418         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2419         ahd_unlock(ahd, &flags);
2420 }
2421
2422 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2423 {
2424         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2425         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2426         struct ahd_tmode_tstate *tstate;
2427         struct ahd_initiator_tinfo *tinfo
2428                 = ahd_fetch_transinfo(ahd,
2429                                       starget->channel + 'A',
2430                                       shost->this_id, starget->id, &tstate);
2431         struct ahd_devinfo devinfo;
2432         unsigned int ppr_options = tinfo->goal.ppr_options;
2433         unsigned int dt;
2434         unsigned long flags;
2435         unsigned long offset = tinfo->goal.offset;
2436
2437 #ifdef AHD_DEBUG
2438         if ((ahd_debug & AHD_SHOW_DV) != 0)
2439                 printf("%s: set period to %d\n", ahd_name(ahd), period);
2440 #endif
2441         if (offset == 0)
2442                 offset = MAX_OFFSET;
2443
2444         if (period < 8)
2445                 period = 8;
2446         if (period < 10) {
2447                 if (spi_max_width(starget)) {
2448                         ppr_options |= MSG_EXT_PPR_DT_REQ;
2449                         if (period == 8)
2450                                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2451                 } else
2452                         period = 10;
2453         }
2454
2455         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2456
2457         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2458                             starget->channel + 'A', ROLE_INITIATOR);
2459
2460         /* all PPR requests apart from QAS require wide transfers */
2461         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2462                 if (spi_width(starget) == 0)
2463                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2464         }
2465
2466         ahd_find_syncrate(ahd, &period, &ppr_options,
2467                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2468
2469         ahd_lock(ahd, &flags);
2470         ahd_set_syncrate(ahd, &devinfo, period, offset,
2471                          ppr_options, AHD_TRANS_GOAL, FALSE);
2472         ahd_unlock(ahd, &flags);
2473 }
2474
2475 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2476 {
2477         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2478         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2479         struct ahd_tmode_tstate *tstate;
2480         struct ahd_initiator_tinfo *tinfo
2481                 = ahd_fetch_transinfo(ahd,
2482                                       starget->channel + 'A',
2483                                       shost->this_id, starget->id, &tstate);
2484         struct ahd_devinfo devinfo;
2485         unsigned int ppr_options = 0;
2486         unsigned int period = 0;
2487         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2488         unsigned long flags;
2489
2490 #ifdef AHD_DEBUG
2491         if ((ahd_debug & AHD_SHOW_DV) != 0)
2492                 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2493 #endif
2494
2495         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2496                             starget->channel + 'A', ROLE_INITIATOR);
2497         if (offset != 0) {
2498                 period = tinfo->goal.period;
2499                 ppr_options = tinfo->goal.ppr_options;
2500                 ahd_find_syncrate(ahd, &period, &ppr_options,
2501                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2502         }
2503
2504         ahd_lock(ahd, &flags);
2505         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2506                          AHD_TRANS_GOAL, FALSE);
2507         ahd_unlock(ahd, &flags);
2508 }
2509
2510 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2511 {
2512         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2513         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2514         struct ahd_tmode_tstate *tstate;
2515         struct ahd_initiator_tinfo *tinfo
2516                 = ahd_fetch_transinfo(ahd,
2517                                       starget->channel + 'A',
2518                                       shost->this_id, starget->id, &tstate);
2519         struct ahd_devinfo devinfo;
2520         unsigned int ppr_options = tinfo->goal.ppr_options
2521                 & ~MSG_EXT_PPR_DT_REQ;
2522         unsigned int period = tinfo->goal.period;
2523         unsigned int width = tinfo->goal.width;
2524         unsigned long flags;
2525
2526 #ifdef AHD_DEBUG
2527         if ((ahd_debug & AHD_SHOW_DV) != 0)
2528                 printf("%s: %s DT\n", ahd_name(ahd),
2529                        dt ? "enabling" : "disabling");
2530 #endif
2531         if (dt && spi_max_width(starget)) {
2532                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2533                 if (!width)
2534                         ahd_linux_set_width(starget, 1);
2535         } else {
2536                 if (period <= 9)
2537                         period = 10; /* If resetting DT, period must be >= 25ns */
2538                 /* IU is invalid without DT set */
2539                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2540         }
2541         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2542                             starget->channel + 'A', ROLE_INITIATOR);
2543         ahd_find_syncrate(ahd, &period, &ppr_options,
2544                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2545
2546         ahd_lock(ahd, &flags);
2547         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2548                          ppr_options, AHD_TRANS_GOAL, FALSE);
2549         ahd_unlock(ahd, &flags);
2550 }
2551
2552 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2553 {
2554         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2555         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2556         struct ahd_tmode_tstate *tstate;
2557         struct ahd_initiator_tinfo *tinfo
2558                 = ahd_fetch_transinfo(ahd,
2559                                       starget->channel + 'A',
2560                                       shost->this_id, starget->id, &tstate);
2561         struct ahd_devinfo devinfo;
2562         unsigned int ppr_options = tinfo->goal.ppr_options
2563                 & ~MSG_EXT_PPR_QAS_REQ;
2564         unsigned int period = tinfo->goal.period;
2565         unsigned int dt;
2566         unsigned long flags;
2567
2568 #ifdef AHD_DEBUG
2569         if ((ahd_debug & AHD_SHOW_DV) != 0)
2570                 printf("%s: %s QAS\n", ahd_name(ahd),
2571                        qas ? "enabling" : "disabling");
2572 #endif
2573
2574         if (qas) {
2575                 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2576         }
2577
2578         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2579
2580         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2581                             starget->channel + 'A', ROLE_INITIATOR);
2582         ahd_find_syncrate(ahd, &period, &ppr_options,
2583                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2584
2585         ahd_lock(ahd, &flags);
2586         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2587                          ppr_options, AHD_TRANS_GOAL, FALSE);
2588         ahd_unlock(ahd, &flags);
2589 }
2590
2591 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2592 {
2593         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2594         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2595         struct ahd_tmode_tstate *tstate;
2596         struct ahd_initiator_tinfo *tinfo
2597                 = ahd_fetch_transinfo(ahd,
2598                                       starget->channel + 'A',
2599                                       shost->this_id, starget->id, &tstate);
2600         struct ahd_devinfo devinfo;
2601         unsigned int ppr_options = tinfo->goal.ppr_options
2602                 & ~MSG_EXT_PPR_IU_REQ;
2603         unsigned int period = tinfo->goal.period;
2604         unsigned int dt;
2605         unsigned long flags;
2606
2607 #ifdef AHD_DEBUG
2608         if ((ahd_debug & AHD_SHOW_DV) != 0)
2609                 printf("%s: %s IU\n", ahd_name(ahd),
2610                        iu ? "enabling" : "disabling");
2611 #endif
2612
2613         if (iu && spi_max_width(starget)) {
2614                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2615                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2616         }
2617
2618         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2619
2620         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2621                             starget->channel + 'A', ROLE_INITIATOR);
2622         ahd_find_syncrate(ahd, &period, &ppr_options,
2623                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2624
2625         ahd_lock(ahd, &flags);
2626         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2627                          ppr_options, AHD_TRANS_GOAL, FALSE);
2628         ahd_unlock(ahd, &flags);
2629 }
2630
2631 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2632 {
2633         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2634         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2635         struct ahd_tmode_tstate *tstate;
2636         struct ahd_initiator_tinfo *tinfo
2637                 = ahd_fetch_transinfo(ahd,
2638                                       starget->channel + 'A',
2639                                       shost->this_id, starget->id, &tstate);
2640         struct ahd_devinfo devinfo;
2641         unsigned int ppr_options = tinfo->goal.ppr_options
2642                 & ~MSG_EXT_PPR_RD_STRM;
2643         unsigned int period = tinfo->goal.period;
2644         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2645         unsigned long flags;
2646
2647 #ifdef AHD_DEBUG
2648         if ((ahd_debug & AHD_SHOW_DV) != 0)
2649                 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2650                        rdstrm  ? "enabling" : "disabling");
2651 #endif
2652
2653         if (rdstrm && spi_max_width(starget))
2654                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2655
2656         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2657                             starget->channel + 'A', ROLE_INITIATOR);
2658         ahd_find_syncrate(ahd, &period, &ppr_options,
2659                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2660
2661         ahd_lock(ahd, &flags);
2662         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2663                          ppr_options, AHD_TRANS_GOAL, FALSE);
2664         ahd_unlock(ahd, &flags);
2665 }
2666
2667 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2668 {
2669         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2670         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2671         struct ahd_tmode_tstate *tstate;
2672         struct ahd_initiator_tinfo *tinfo
2673                 = ahd_fetch_transinfo(ahd,
2674                                       starget->channel + 'A',
2675                                       shost->this_id, starget->id, &tstate);
2676         struct ahd_devinfo devinfo;
2677         unsigned int ppr_options = tinfo->goal.ppr_options
2678                 & ~MSG_EXT_PPR_WR_FLOW;
2679         unsigned int period = tinfo->goal.period;
2680         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2681         unsigned long flags;
2682
2683 #ifdef AHD_DEBUG
2684         if ((ahd_debug & AHD_SHOW_DV) != 0)
2685                 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2686                        wrflow ? "enabling" : "disabling");
2687 #endif
2688
2689         if (wrflow && spi_max_width(starget))
2690                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2691
2692         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2693                             starget->channel + 'A', ROLE_INITIATOR);
2694         ahd_find_syncrate(ahd, &period, &ppr_options,
2695                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2696
2697         ahd_lock(ahd, &flags);
2698         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2699                          ppr_options, AHD_TRANS_GOAL, FALSE);
2700         ahd_unlock(ahd, &flags);
2701 }
2702
2703 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2704 {
2705         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2706         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2707         struct ahd_tmode_tstate *tstate;
2708         struct ahd_initiator_tinfo *tinfo
2709                 = ahd_fetch_transinfo(ahd,
2710                                       starget->channel + 'A',
2711                                       shost->this_id, starget->id, &tstate);
2712         struct ahd_devinfo devinfo;
2713         unsigned int ppr_options = tinfo->goal.ppr_options
2714                 & ~MSG_EXT_PPR_RTI;
2715         unsigned int period = tinfo->goal.period;
2716         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2717         unsigned long flags;
2718
2719         if ((ahd->features & AHD_RTI) == 0) {
2720 #ifdef AHD_DEBUG
2721                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2722                         printf("%s: RTI not available\n", ahd_name(ahd));
2723 #endif
2724                 return;
2725         }
2726
2727 #ifdef AHD_DEBUG
2728         if ((ahd_debug & AHD_SHOW_DV) != 0)
2729                 printf("%s: %s RTI\n", ahd_name(ahd),
2730                        rti ? "enabling" : "disabling");
2731 #endif
2732
2733         if (rti && spi_max_width(starget))
2734                 ppr_options |= MSG_EXT_PPR_RTI;
2735
2736         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2737                             starget->channel + 'A', ROLE_INITIATOR);
2738         ahd_find_syncrate(ahd, &period, &ppr_options,
2739                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2740
2741         ahd_lock(ahd, &flags);
2742         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2743                          ppr_options, AHD_TRANS_GOAL, FALSE);
2744         ahd_unlock(ahd, &flags);
2745 }
2746
2747 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2748 {
2749         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2750         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2751         struct ahd_tmode_tstate *tstate;
2752         struct ahd_initiator_tinfo *tinfo
2753                 = ahd_fetch_transinfo(ahd,
2754                                       starget->channel + 'A',
2755                                       shost->this_id, starget->id, &tstate);
2756         struct ahd_devinfo devinfo;
2757         unsigned int ppr_options = tinfo->goal.ppr_options
2758                 & ~MSG_EXT_PPR_PCOMP_EN;
2759         unsigned int period = tinfo->goal.period;
2760         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2761         unsigned long flags;
2762
2763 #ifdef AHD_DEBUG
2764         if ((ahd_debug & AHD_SHOW_DV) != 0)
2765                 printf("%s: %s Precompensation\n", ahd_name(ahd),
2766                        pcomp ? "Enable" : "Disable");
2767 #endif
2768
2769         if (pcomp && spi_max_width(starget)) {
2770                 uint8_t precomp;
2771
2772                 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2773                         struct ahd_linux_iocell_opts *iocell_opts;
2774
2775                         iocell_opts = &aic79xx_iocell_info[ahd->unit];
2776                         precomp = iocell_opts->precomp;
2777                 } else {
2778                         precomp = AIC79XX_DEFAULT_PRECOMP;
2779                 }
2780                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2781                 AHD_SET_PRECOMP(ahd, precomp);
2782         } else {
2783                 AHD_SET_PRECOMP(ahd, 0);
2784         }
2785
2786         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2787                             starget->channel + 'A', ROLE_INITIATOR);
2788         ahd_find_syncrate(ahd, &period, &ppr_options,
2789                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2790
2791         ahd_lock(ahd, &flags);
2792         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2793                          ppr_options, AHD_TRANS_GOAL, FALSE);
2794         ahd_unlock(ahd, &flags);
2795 }
2796
2797 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2798 {
2799         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2800         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2801         struct ahd_tmode_tstate *tstate;
2802         struct ahd_initiator_tinfo *tinfo
2803                 = ahd_fetch_transinfo(ahd,
2804                                       starget->channel + 'A',
2805                                       shost->this_id, starget->id, &tstate);
2806         struct ahd_devinfo devinfo;
2807         unsigned int ppr_options = tinfo->goal.ppr_options
2808                 & ~MSG_EXT_PPR_HOLD_MCS;
2809         unsigned int period = tinfo->goal.period;
2810         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2811         unsigned long flags;
2812
2813         if (hold && spi_max_width(starget))
2814                 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2815
2816         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2817                             starget->channel + 'A', ROLE_INITIATOR);
2818         ahd_find_syncrate(ahd, &period, &ppr_options,
2819                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2820
2821         ahd_lock(ahd, &flags);
2822         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2823                          ppr_options, AHD_TRANS_GOAL, FALSE);
2824         ahd_unlock(ahd, &flags);
2825 }
2826
2827 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2828 {
2829         struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2830         unsigned long flags;
2831         u8 mode;
2832
2833         ahd_lock(ahd, &flags);
2834         ahd_pause(ahd);
2835         mode = ahd_inb(ahd, SBLKCTL);
2836         ahd_unpause(ahd);
2837         ahd_unlock(ahd, &flags);
2838
2839         if (mode & ENAB40)
2840                 spi_signalling(shost) = SPI_SIGNAL_LVD;
2841         else if (mode & ENAB20)
2842                 spi_signalling(shost) = SPI_SIGNAL_SE;
2843         else
2844                 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2845 }
2846
2847 static struct spi_function_template ahd_linux_transport_functions = {
2848         .set_offset     = ahd_linux_set_offset,
2849         .show_offset    = 1,
2850         .set_period     = ahd_linux_set_period,
2851         .show_period    = 1,
2852         .set_width      = ahd_linux_set_width,
2853         .show_width     = 1,
2854         .set_dt         = ahd_linux_set_dt,
2855         .show_dt        = 1,
2856         .set_iu         = ahd_linux_set_iu,
2857         .show_iu        = 1,
2858         .set_qas        = ahd_linux_set_qas,
2859         .show_qas       = 1,
2860         .set_rd_strm    = ahd_linux_set_rd_strm,
2861         .show_rd_strm   = 1,
2862         .set_wr_flow    = ahd_linux_set_wr_flow,
2863         .show_wr_flow   = 1,
2864         .set_rti        = ahd_linux_set_rti,
2865         .show_rti       = 1,
2866         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2867         .show_pcomp_en  = 1,
2868         .set_hold_mcs   = ahd_linux_set_hold_mcs,
2869         .show_hold_mcs  = 1,
2870         .get_signalling = ahd_linux_get_signalling,
2871 };
2872
2873 static int __init
2874 ahd_linux_init(void)
2875 {
2876         int     error = 0;
2877
2878         /*
2879          * If we've been passed any parameters, process them now.
2880          */
2881         if (aic79xx)
2882                 aic79xx_setup(aic79xx);
2883
2884         ahd_linux_transport_template =
2885                 spi_attach_transport(&ahd_linux_transport_functions);
2886         if (!ahd_linux_transport_template)
2887                 return -ENODEV;
2888
2889         scsi_transport_reserve_device(ahd_linux_transport_template,
2890                                       sizeof(struct ahd_linux_device));
2891
2892         error = ahd_linux_pci_init();
2893         if (error)
2894                 spi_release_transport(ahd_linux_transport_template);
2895         return error;
2896 }
2897
2898 static void __exit
2899 ahd_linux_exit(void)
2900 {
2901         ahd_linux_pci_exit();
2902         spi_release_transport(ahd_linux_transport_template);
2903 }
2904
2905 module_init(ahd_linux_init);
2906 module_exit(ahd_linux_exit);