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 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: Justin T. Gibbs <gibbs@scsiguy.com>");
 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                Supress 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
 367 static int ahd_linux_unit;
 368
 369
 370 /****************************** Inlines ***************************************/
 371 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
 372
 373 static __inline void
 374 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
 375 {
 376         struct scsi_cmnd *cmd;
 377         int direction;
 378
 379         cmd = scb->io_ctx;
 380         direction = cmd->sc_data_direction;
 381         ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
 382         if (cmd->use_sg != 0) {
 383                 struct scatterlist *sg;
 384
 385                 sg = (struct scatterlist *)cmd->request_buffer;
 386                 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
 387         } else if (cmd->request_bufflen != 0) {
 388                 pci_unmap_single(ahd->dev_softc,
 389                                  scb->platform_data->buf_busaddr,
 390                                  cmd->request_bufflen, direction);
 391         }
 392 }
 393
 394 /******************************** Macros **************************************/
 395 #define BUILD_SCSIID(ahd, cmd)                                          \
 396         (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
 397
 398 /*
 399  * Return a string describing the driver.
 400  */
 401 static const char *
 402 ahd_linux_info(struct Scsi_Host *host)
 403 {
 404         static char buffer[512];
 405         char    ahd_info[256];
 406         char   *bp;
 407         struct ahd_softc *ahd;
 408
 409         bp = &buffer[0];
 410         ahd = *(struct ahd_softc **)host->hostdata;
 411         memset(bp, 0, sizeof(buffer));
 412         strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
 413         strcat(bp, AIC79XX_DRIVER_VERSION);
 414         strcat(bp, "\n");
 415         strcat(bp, "        <");
 416         strcat(bp, ahd->description);
 417         strcat(bp, ">\n");
 418         strcat(bp, "        ");
 419         ahd_controller_info(ahd, ahd_info);
 420         strcat(bp, ahd_info);
 421         strcat(bp, "\n");
 422
 423         return (bp);
 424 }
 425
 426 /*
 427  * Queue an SCB to the controller.
 428  */
 429 static int
 430 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 431 {
 432         struct   ahd_softc *ahd;
 433         struct   ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
 434         int rtn = SCSI_MLQUEUE_HOST_BUSY;
 435
 436         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 437
 438         cmd->scsi_done = scsi_done;
 439         cmd->result = CAM_REQ_INPROG << 16;
 440         rtn = ahd_linux_run_command(ahd, dev, cmd);
 441
 442         return rtn;
 443 }
 444
 445 static inline struct scsi_target **
 446 ahd_linux_target_in_softc(struct scsi_target *starget)
 447 {
 448         struct  ahd_softc *ahd =
 449                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 450         unsigned int target_offset;
 451
 452         target_offset = starget->id;
 453         if (starget->channel != 0)
 454                 target_offset += 8;
 455
 456         return &ahd->platform_data->starget[target_offset];
 457 }
 458
 459 static int
 460 ahd_linux_target_alloc(struct scsi_target *starget)
 461 {
 462         struct  ahd_softc *ahd =
 463                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 464         struct seeprom_config *sc = ahd->seep_config;
 465         unsigned long flags;
 466         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 467         struct ahd_devinfo devinfo;
 468         struct ahd_initiator_tinfo *tinfo;
 469         struct ahd_tmode_tstate *tstate;
 470         char channel = starget->channel + 'A';
 471
 472         ahd_lock(ahd, &flags);
 473
 474         BUG_ON(*ahd_targp != NULL);
 475
 476         *ahd_targp = starget;
 477
 478         if (sc) {
 479                 int flags = sc->device_flags[starget->id];
 480
 481                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 482                                             starget->id, &tstate);
 483
 484                 if ((flags  & CFPACKETIZED) == 0) {
 485                         /* Do not negotiate packetized transfers */
 486                         spi_rd_strm(starget) = 0;
 487                         spi_pcomp_en(starget) = 0;
 488                         spi_rti(starget) = 0;
 489                         spi_wr_flow(starget) = 0;
 490                         spi_hold_mcs(starget) = 0;
 491                 } else {
 492                         if ((ahd->features & AHD_RTI) == 0)
 493                                 spi_rti(starget) = 0;
 494                 }
 495
 496                 if ((flags & CFQAS) == 0)
 497                         spi_qas(starget) = 0;
 498
 499                 /* Transinfo values have been set to BIOS settings */
 500                 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
 501                 spi_min_period(starget) = tinfo->user.period;
 502                 spi_max_offset(starget) = tinfo->user.offset;
 503         }
 504
 505         tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
 506                                     starget->id, &tstate);
 507         ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
 508                             CAM_LUN_WILDCARD, channel,
 509                             ROLE_INITIATOR);
 510         ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
 511                          AHD_TRANS_GOAL, /*paused*/FALSE);
 512         ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
 513                       AHD_TRANS_GOAL, /*paused*/FALSE);
 514         ahd_unlock(ahd, &flags);
 515
 516         return 0;
 517 }
 518
 519 static void
 520 ahd_linux_target_destroy(struct scsi_target *starget)
 521 {
 522         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 523
 524         *ahd_targp = NULL;
 525 }
 526
 527 static int
 528 ahd_linux_slave_alloc(struct scsi_device *sdev)
 529 {
 530         struct  ahd_softc *ahd =
 531                 *((struct ahd_softc **)sdev->host->hostdata);
 532         struct ahd_linux_device *dev;
 533
 534         if (bootverbose)
 535                 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
 536
 537         dev = scsi_transport_device_data(sdev);
 538         memset(dev, 0, sizeof(*dev));
 539
 540         /*
 541          * We start out life using untagged
 542          * transactions of which we allow one.
 543          */
 544         dev->openings = 1;
 545
 546         /*
 547          * Set maxtags to 0.  This will be changed if we
 548          * later determine that we are dealing with
 549          * a tagged queuing capable device.
 550          */
 551         dev->maxtags = 0;
 552
 553         return (0);
 554 }
 555
 556 static int
 557 ahd_linux_slave_configure(struct scsi_device *sdev)
 558 {
 559         struct  ahd_softc *ahd;
 560
 561         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 562         if (bootverbose)
 563                 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
 564
 565         ahd_linux_device_queue_depth(sdev);
 566
 567         /* Initial Domain Validation */
 568         if (!spi_initial_dv(sdev->sdev_target))
 569                 spi_dv_device(sdev);
 570
 571         return 0;
 572 }
 573
 574 #if defined(__i386__)
 575 /*
 576  * Return the disk geometry for the given SCSI device.
 577  */
 578 static int
 579 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 580                     sector_t capacity, int geom[])
 581 {
 582         uint8_t *bh;
 583         int      heads;
 584         int      sectors;
 585         int      cylinders;
 586         int      ret;
 587         int      extended;
 588         struct   ahd_softc *ahd;
 589
 590         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 591
 592         bh = scsi_bios_ptable(bdev);
 593         if (bh) {
 594                 ret = scsi_partsize(bh, capacity,
 595                                     &geom[2], &geom[0], &geom[1]);
 596                 kfree(bh);
 597                 if (ret != -1)
 598                         return (ret);
 599         }
 600         heads = 64;
 601         sectors = 32;
 602         cylinders = aic_sector_div(capacity, heads, sectors);
 603
 604         if (aic79xx_extended != 0)
 605                 extended = 1;
 606         else
 607                 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
 608         if (extended && cylinders >= 1024) {
 609                 heads = 255;
 610                 sectors = 63;
 611                 cylinders = aic_sector_div(capacity, heads, sectors);
 612         }
 613         geom[0] = heads;
 614         geom[1] = sectors;
 615         geom[2] = cylinders;
 616         return (0);
 617 }
 618 #endif
 619
 620 /*
 621  * Abort the current SCSI command(s).
 622  */
 623 static int
 624 ahd_linux_abort(struct scsi_cmnd *cmd)
 625 {
 626         int error;
 627
 628         error = ahd_linux_queue_abort_cmd(cmd);
 629
 630         return error;
 631 }
 632
 633 /*
 634  * Attempt to send a target reset message to the device that timed out.
 635  */
 636 static int
 637 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
 638 {
 639         struct ahd_softc *ahd;
 640         struct ahd_linux_device *dev;
 641         struct scb *reset_scb;
 642         u_int  cdb_byte;
 643         int    retval = SUCCESS;
 644         int    paused;
 645         int    wait;
 646         struct  ahd_initiator_tinfo *tinfo;
 647         struct  ahd_tmode_tstate *tstate;
 648         unsigned long flags;
 649         DECLARE_COMPLETION(done);
 650
 651         reset_scb = NULL;
 652         paused = FALSE;
 653         wait = FALSE;
 654         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 655
 656         scmd_printk(KERN_INFO, cmd,
 657                     "Attempting to queue a TARGET RESET message:");
 658
 659         printf("CDB:");
 660         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
 661                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
 662         printf("\n");
 663
 664         /*
 665          * Determine if we currently own this command.
 666          */
 667         dev = scsi_transport_device_data(cmd->device);
 668
 669         if (dev == NULL) {
 670                 /*
 671                  * No target device for this command exists,
 672                  * so we must not still own the command.
 673                  */
 674                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
 675                 return SUCCESS;
 676         }
 677
 678         /*
 679          * Generate us a new SCB
 680          */
 681         reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
 682         if (!reset_scb) {
 683                 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
 684                 return FAILED;
 685         }
 686
 687         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 688                                     cmd->device->id, &tstate);
 689         reset_scb->io_ctx = cmd;
 690         reset_scb->platform_data->dev = dev;
 691         reset_scb->sg_count = 0;
 692         ahd_set_residual(reset_scb, 0);
 693         ahd_set_sense_residual(reset_scb, 0);
 694         reset_scb->platform_data->xfer_len = 0;
 695         reset_scb->hscb->control = 0;
 696         reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
 697         reset_scb->hscb->lun = cmd->device->lun;
 698         reset_scb->hscb->cdb_len = 0;
 699         reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
 700         reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
 701         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 702                 reset_scb->flags |= SCB_PACKETIZED;
 703         } else {
 704                 reset_scb->hscb->control |= MK_MESSAGE;
 705         }
 706         dev->openings--;
 707         dev->active++;
 708         dev->commands_issued++;
 709
 710         ahd_lock(ahd, &flags);
 711
 712         LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
 713         ahd_queue_scb(ahd, reset_scb);
 714
 715         ahd->platform_data->eh_done = &done;
 716         ahd_unlock(ahd, &flags);
 717
 718         printf("%s: Device reset code sleeping\n", ahd_name(ahd));
 719         if (!wait_for_completion_timeout(&done, 5 * HZ)) {
 720                 ahd_lock(ahd, &flags);
 721                 ahd->platform_data->eh_done = NULL;
 722                 ahd_unlock(ahd, &flags);
 723                 printf("%s: Device reset timer expired (active %d)\n",
 724                        ahd_name(ahd), dev->active);
 725                 retval = FAILED;
 726         }
 727         printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
 728
 729         return (retval);
 730 }
 731
 732 /*
 733  * Reset the SCSI bus.
 734  */
 735 static int
 736 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 737 {
 738         struct ahd_softc *ahd;
 739         int    found;
 740         unsigned long flags;
 741
 742         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 743 #ifdef AHD_DEBUG
 744         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 745                 printf("%s: Bus reset called for cmd %p\n",
 746                        ahd_name(ahd), cmd);
 747 #endif
 748         ahd_lock(ahd, &flags);
 749
 750         found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 751                                   /*initiate reset*/TRUE);
 752         ahd_unlock(ahd, &flags);
 753
 754         if (bootverbose)
 755                 printf("%s: SCSI bus reset delivered. "
 756                        "%d SCBs aborted.\n", ahd_name(ahd), found);
 757
 758         return (SUCCESS);
 759 }
 760
 761 struct scsi_host_template aic79xx_driver_template = {
 762         .module                 = THIS_MODULE,
 763         .name                   = "aic79xx",
 764         .proc_name              = "aic79xx",
 765         .proc_info              = ahd_linux_proc_info,
 766         .info                   = ahd_linux_info,
 767         .queuecommand           = ahd_linux_queue,
 768         .eh_abort_handler       = ahd_linux_abort,
 769         .eh_device_reset_handler = ahd_linux_dev_reset,
 770         .eh_bus_reset_handler   = ahd_linux_bus_reset,
 771 #if defined(__i386__)
 772         .bios_param             = ahd_linux_biosparam,
 773 #endif
 774         .can_queue              = AHD_MAX_QUEUE,
 775         .this_id                = -1,
 776         .cmd_per_lun            = 2,
 777         .use_clustering         = ENABLE_CLUSTERING,
 778         .slave_alloc            = ahd_linux_slave_alloc,
 779         .slave_configure        = ahd_linux_slave_configure,
 780         .target_alloc           = ahd_linux_target_alloc,
 781         .target_destroy         = ahd_linux_target_destroy,
 782 };
 783
 784 /******************************** Bus DMA *************************************/
 785 int
 786 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
 787                    bus_size_t alignment, bus_size_t boundary,
 788                    dma_addr_t lowaddr, dma_addr_t highaddr,
 789                    bus_dma_filter_t *filter, void *filterarg,
 790                    bus_size_t maxsize, int nsegments,
 791                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
 792 {
 793         bus_dma_tag_t dmat;
 794
 795         dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
 796         if (dmat == NULL)
 797                 return (ENOMEM);
 798
 799         /*
 800          * Linux is very simplistic about DMA memory.  For now don't
 801          * maintain all specification information.  Once Linux supplies
 802          * better facilities for doing these operations, or the
 803          * needs of this particular driver change, we might need to do
 804          * more here.
 805          */
 806         dmat->alignment = alignment;
 807         dmat->boundary = boundary;
 808         dmat->maxsize = maxsize;
 809         *ret_tag = dmat;
 810         return (0);
 811 }
 812
 813 void
 814 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
 815 {
 816         free(dmat, M_DEVBUF);
 817 }
 818
 819 int
 820 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
 821                  int flags, bus_dmamap_t *mapp)
 822 {
 823         *vaddr = pci_alloc_consistent(ahd->dev_softc,
 824                                       dmat->maxsize, mapp);
 825         if (*vaddr == NULL)
 826                 return (ENOMEM);
 827         return(0);
 828 }
 829
 830 void
 831 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
 832                 void* vaddr, bus_dmamap_t map)
 833 {
 834         pci_free_consistent(ahd->dev_softc, dmat->maxsize,
 835                             vaddr, map);
 836 }
 837
 838 int
 839 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
 840                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
 841                 void *cb_arg, int flags)
 842 {
 843         /*
 844          * Assume for now that this will only be used during
 845          * initialization and not for per-transaction buffer mapping.
 846          */
 847         bus_dma_segment_t stack_sg;
 848
 849         stack_sg.ds_addr = map;
 850         stack_sg.ds_len = dmat->maxsize;
 851         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
 852         return (0);
 853 }
 854
 855 void
 856 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 857 {
 858 }
 859
 860 int
 861 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 862 {
 863         /* Nothing to do */
 864         return (0);
 865 }
 866
 867 /********************* Platform Dependent Functions ***************************/
 868 static void
 869 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
 870 {
 871
 872         if ((instance >= 0)
 873          && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
 874                 uint8_t *iocell_info;
 875
 876                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
 877                 iocell_info[index] = value & 0xFFFF;
 878                 if (bootverbose)
 879                         printf("iocell[%d:%ld] = %d\n", instance, index, value);
 880         }
 881 }
 882
 883 static void
 884 ahd_linux_setup_tag_info_global(char *p)
 885 {
 886         int tags, i, j;
 887
 888         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
 889         printf("Setting Global Tags= %d\n", tags);
 890
 891         for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
 892                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
 893                         aic79xx_tag_info[i].tag_commands[j] = tags;
 894                 }
 895         }
 896 }
 897
 898 static void
 899 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
 900 {
 901
 902         if ((instance >= 0) && (targ >= 0)
 903          && (instance < ARRAY_SIZE(aic79xx_tag_info))
 904          && (targ < AHD_NUM_TARGETS)) {
 905                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
 906                 if (bootverbose)
 907                         printf("tag_info[%d:%d] = %d\n", instance, targ, value);
 908         }
 909 }
 910
 911 static char *
 912 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
 913                        void (*callback)(u_long, int, int, int32_t),
 914                        u_long callback_arg)
 915 {
 916         char    *tok_end;
 917         char    *tok_end2;
 918         int      i;
 919         int      instance;
 920         int      targ;
 921         int      done;
 922         char     tok_list[] = {'.', ',', '{', '}', '\0'};
 923
 924         /* All options use a ':' name/arg separator */
 925         if (*opt_arg != ':')
 926                 return (opt_arg);
 927         opt_arg++;
 928         instance = -1;
 929         targ = -1;
 930         done = FALSE;
 931         /*
 932          * Restore separator that may be in
 933          * the middle of our option argument.
 934          */
 935         tok_end = strchr(opt_arg, '\0');
 936         if (tok_end < end)
 937                 *tok_end = ',';
 938         while (!done) {
 939                 switch (*opt_arg) {
 940                 case '{':
 941                         if (instance == -1) {
 942                                 instance = 0;
 943                         } else {
 944                                 if (depth > 1) {
 945                                         if (targ == -1)
 946                                                 targ = 0;
 947                                 } else {
 948                                         printf("Malformed Option %s\n",
 949                                                opt_name);
 950                                         done = TRUE;
 951                                 }
 952                         }
 953                         opt_arg++;
 954                         break;
 955                 case '}':
 956                         if (targ != -1)
 957                                 targ = -1;
 958                         else if (instance != -1)
 959                                 instance = -1;
 960                         opt_arg++;
 961                         break;
 962                 case ',':
 963                 case '.':
 964                         if (instance == -1)
 965                                 done = TRUE;
 966                         else if (targ >= 0)
 967                                 targ++;
 968                         else if (instance >= 0)
 969                                 instance++;
 970                         opt_arg++;
 971                         break;
 972                 case '\0':
 973                         done = TRUE;
 974                         break;
 975                 default:
 976                         tok_end = end;
 977                         for (i = 0; tok_list[i]; i++) {
 978                                 tok_end2 = strchr(opt_arg, tok_list[i]);
 979                                 if ((tok_end2) && (tok_end2 < tok_end))
 980                                         tok_end = tok_end2;
 981                         }
 982                         callback(callback_arg, instance, targ,
 983                                  simple_strtol(opt_arg, NULL, 0));
 984                         opt_arg = tok_end;
 985                         break;
 986                 }
 987         }
 988         return (opt_arg);
 989 }
 990
 991 /*
 992  * Handle Linux boot parameters. This routine allows for assigning a value
 993  * to a parameter with a ':' between the parameter and the value.
 994  * ie. aic79xx=stpwlev:1,extended
 995  */
 996 static int
 997 aic79xx_setup(char *s)
 998 {
 999         int     i, n;
1000         char   *p;
1001         char   *end;
1002
1003         static struct {
1004                 const char *name;
1005                 uint32_t *flag;
1006         } options[] = {
1007                 { "extended", &aic79xx_extended },
1008                 { "no_reset", &aic79xx_no_reset },
1009                 { "verbose", &aic79xx_verbose },
1010                 { "allow_memio", &aic79xx_allow_memio},
1011 #ifdef AHD_DEBUG
1012                 { "debug", &ahd_debug },
1013 #endif
1014                 { "periodic_otag", &aic79xx_periodic_otag },
1015                 { "pci_parity", &aic79xx_pci_parity },
1016                 { "seltime", &aic79xx_seltime },
1017                 { "tag_info", NULL },
1018                 { "global_tag_depth", NULL},
1019                 { "slewrate", NULL },
1020                 { "precomp", NULL },
1021                 { "amplitude", NULL },
1022                 { "slowcrc", &aic79xx_slowcrc },
1023         };
1024
1025         end = strchr(s, '\0');
1026
1027         /*
1028          * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1029          * will never be 0 in this case.
1030          */
1031         n = 0;
1032
1033         while ((p = strsep(&s, ",.")) != NULL) {
1034                 if (*p == '\0')
1035                         continue;
1036                 for (i = 0; i < ARRAY_SIZE(options); i++) {
1037
1038                         n = strlen(options[i].name);
1039                         if (strncmp(options[i].name, p, n) == 0)
1040                                 break;
1041                 }
1042                 if (i == ARRAY_SIZE(options))
1043                         continue;
1044
1045                 if (strncmp(p, "global_tag_depth", n) == 0) {
1046                         ahd_linux_setup_tag_info_global(p + n);
1047                 } else if (strncmp(p, "tag_info", n) == 0) {
1048                         s = ahd_parse_brace_option("tag_info", p + n, end,
1049                             2, ahd_linux_setup_tag_info, 0);
1050                 } else if (strncmp(p, "slewrate", n) == 0) {
1051                         s = ahd_parse_brace_option("slewrate",
1052                             p + n, end, 1, ahd_linux_setup_iocell_info,
1053                             AIC79XX_SLEWRATE_INDEX);
1054                 } else if (strncmp(p, "precomp", n) == 0) {
1055                         s = ahd_parse_brace_option("precomp",
1056                             p + n, end, 1, ahd_linux_setup_iocell_info,
1057                             AIC79XX_PRECOMP_INDEX);
1058                 } else if (strncmp(p, "amplitude", n) == 0) {
1059                         s = ahd_parse_brace_option("amplitude",
1060                             p + n, end, 1, ahd_linux_setup_iocell_info,
1061                             AIC79XX_AMPLITUDE_INDEX);
1062                 } else if (p[n] == ':') {
1063                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1064                 } else if (!strncmp(p, "verbose", n)) {
1065                         *(options[i].flag) = 1;
1066                 } else {
1067                         *(options[i].flag) ^= 0xFFFFFFFF;
1068                 }
1069         }
1070         return 1;
1071 }
1072
1073 __setup("aic79xx=", aic79xx_setup);
1074
1075 uint32_t aic79xx_verbose;
1076
1077 int
1078 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1079 {
1080         char    buf[80];
1081         struct  Scsi_Host *host;
1082         char    *new_name;
1083         u_long  s;
1084         int     retval;
1085
1086         template->name = ahd->description;
1087         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1088         if (host == NULL)
1089                 return (ENOMEM);
1090
1091         *((struct ahd_softc **)host->hostdata) = ahd;
1092         ahd->platform_data->host = host;
1093         host->can_queue = AHD_MAX_QUEUE;
1094         host->cmd_per_lun = 2;
1095         host->sg_tablesize = AHD_NSEG;
1096         host->this_id = ahd->our_id;
1097         host->irq = ahd->platform_data->irq;
1098         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1099         host->max_lun = AHD_NUM_LUNS;
1100         host->max_channel = 0;
1101         host->sg_tablesize = AHD_NSEG;
1102         ahd_lock(ahd, &s);
1103         ahd_set_unit(ahd, ahd_linux_unit++);
1104         ahd_unlock(ahd, &s);
1105         sprintf(buf, "scsi%d", host->host_no);
1106         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1107         if (new_name != NULL) {
1108                 strcpy(new_name, buf);
1109                 ahd_set_name(ahd, new_name);
1110         }
1111         host->unique_id = ahd->unit;
1112         ahd_linux_initialize_scsi_bus(ahd);
1113         ahd_intr_enable(ahd, TRUE);
1114
1115         host->transportt = ahd_linux_transport_template;
1116
1117         retval = scsi_add_host(host, &ahd->dev_softc->dev);
1118         if (retval) {
1119                 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1120                 scsi_host_put(host);
1121                 return retval;
1122         }
1123
1124         scsi_scan_host(host);
1125         return 0;
1126 }
1127
1128 uint64_t
1129 ahd_linux_get_memsize(void)
1130 {
1131         struct sysinfo si;
1132
1133         si_meminfo(&si);
1134         return ((uint64_t)si.totalram << PAGE_SHIFT);
1135 }
1136
1137 /*
1138  * Place the SCSI bus into a known state by either resetting it,
1139  * or forcing transfer negotiations on the next command to any
1140  * target.
1141  */
1142 static void
1143 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1144 {
1145         u_int target_id;
1146         u_int numtarg;
1147         unsigned long s;
1148
1149         target_id = 0;
1150         numtarg = 0;
1151
1152         if (aic79xx_no_reset != 0)
1153                 ahd->flags &= ~AHD_RESET_BUS_A;
1154
1155         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1156                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1157         else
1158                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1159
1160         ahd_lock(ahd, &s);
1161
1162         /*
1163          * Force negotiation to async for all targets that
1164          * will not see an initial bus reset.
1165          */
1166         for (; target_id < numtarg; target_id++) {
1167                 struct ahd_devinfo devinfo;
1168                 struct ahd_initiator_tinfo *tinfo;
1169                 struct ahd_tmode_tstate *tstate;
1170
1171                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1172                                             target_id, &tstate);
1173                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1174                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1175                 ahd_update_neg_request(ahd, &devinfo, tstate,
1176                                        tinfo, AHD_NEG_ALWAYS);
1177         }
1178         ahd_unlock(ahd, &s);
1179         /* Give the bus some time to recover */
1180         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1181                 ahd_freeze_simq(ahd);
1182                 msleep(AIC79XX_RESET_DELAY);
1183                 ahd_release_simq(ahd);
1184         }
1185 }
1186
1187 int
1188 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1189 {
1190         ahd->platform_data =
1191             malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1192         if (ahd->platform_data == NULL)
1193                 return (ENOMEM);
1194         memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1195         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1196         ahd_lockinit(ahd);
1197         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1198         return (0);
1199 }
1200
1201 void
1202 ahd_platform_free(struct ahd_softc *ahd)
1203 {
1204         struct scsi_target *starget;
1205         int i;
1206
1207         if (ahd->platform_data != NULL) {
1208                 /* destroy all of the device and target objects */
1209                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1210                         starget = ahd->platform_data->starget[i];
1211                         if (starget != NULL) {
1212                                 ahd->platform_data->starget[i] = NULL;
1213                         }
1214                 }
1215
1216                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1217                         free_irq(ahd->platform_data->irq, ahd);
1218                 if (ahd->tags[0] == BUS_SPACE_PIO
1219                  && ahd->bshs[0].ioport != 0)
1220                         release_region(ahd->bshs[0].ioport, 256);
1221                 if (ahd->tags[1] == BUS_SPACE_PIO
1222                  && ahd->bshs[1].ioport != 0)
1223                         release_region(ahd->bshs[1].ioport, 256);
1224                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1225                  && ahd->bshs[0].maddr != NULL) {
1226                         iounmap(ahd->bshs[0].maddr);
1227                         release_mem_region(ahd->platform_data->mem_busaddr,
1228                                            0x1000);
1229                 }
1230                 if (ahd->platform_data->host)
1231                         scsi_host_put(ahd->platform_data->host);
1232
1233                 free(ahd->platform_data, M_DEVBUF);
1234         }
1235 }
1236
1237 void
1238 ahd_platform_init(struct ahd_softc *ahd)
1239 {
1240         /*
1241          * Lookup and commit any modified IO Cell options.
1242          */
1243         if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1244                 struct ahd_linux_iocell_opts *iocell_opts;
1245
1246                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1247                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1248                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1249                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1250                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1251                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1252                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1253         }
1254
1255 }
1256
1257 void
1258 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1259 {
1260         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1261                                 SCB_GET_CHANNEL(ahd, scb),
1262                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1263                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1264 }
1265
1266 void
1267 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1268                       struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1269 {
1270         struct ahd_linux_device *dev;
1271         int was_queuing;
1272         int now_queuing;
1273
1274         if (sdev == NULL)
1275                 return;
1276
1277         dev = scsi_transport_device_data(sdev);
1278
1279         if (dev == NULL)
1280                 return;
1281         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1282         switch (alg) {
1283         default:
1284         case AHD_QUEUE_NONE:
1285                 now_queuing = 0;
1286                 break;
1287         case AHD_QUEUE_BASIC:
1288                 now_queuing = AHD_DEV_Q_BASIC;
1289                 break;
1290         case AHD_QUEUE_TAGGED:
1291                 now_queuing = AHD_DEV_Q_TAGGED;
1292                 break;
1293         }
1294         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1295          && (was_queuing != now_queuing)
1296          && (dev->active != 0)) {
1297                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1298                 dev->qfrozen++;
1299         }
1300
1301         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1302         if (now_queuing) {
1303                 u_int usertags;
1304
1305                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1306                 if (!was_queuing) {
1307                         /*
1308                          * Start out agressively and allow our
1309                          * dynamic queue depth algorithm to take
1310                          * care of the rest.
1311                          */
1312                         dev->maxtags = usertags;
1313                         dev->openings = dev->maxtags - dev->active;
1314                 }
1315                 if (dev->maxtags == 0) {
1316                         /*
1317                          * Queueing is disabled by the user.
1318                          */
1319                         dev->openings = 1;
1320                 } else if (alg == AHD_QUEUE_TAGGED) {
1321                         dev->flags |= AHD_DEV_Q_TAGGED;
1322                         if (aic79xx_periodic_otag != 0)
1323                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1324                 } else
1325                         dev->flags |= AHD_DEV_Q_BASIC;
1326         } else {
1327                 /* We can only have one opening. */
1328                 dev->maxtags = 0;
1329                 dev->openings =  1 - dev->active;
1330         }
1331
1332         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1333         case AHD_DEV_Q_BASIC:
1334                 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1335                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1336                 break;
1337         case AHD_DEV_Q_TAGGED:
1338                 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1339                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1340                 break;
1341         default:
1342                 /*
1343                  * We allow the OS to queue 2 untagged transactions to
1344                  * us at any time even though we can only execute them
1345                  * serially on the controller/device.  This should
1346                  * remove some latency.
1347                  */
1348                 scsi_deactivate_tcq(sdev, 1);
1349                 break;
1350         }
1351 }
1352
1353 int
1354 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1355                         int lun, u_int tag, role_t role, uint32_t status)
1356 {
1357         return 0;
1358 }
1359
1360 static u_int
1361 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1362 {
1363         static int warned_user;
1364         u_int tags;
1365
1366         tags = 0;
1367         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1368                 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1369
1370                         if (warned_user == 0) {
1371                                 printf(KERN_WARNING
1372 "aic79xx: WARNING: Insufficient tag_info instances\n"
1373 "aic79xx: for installed controllers.  Using defaults\n"
1374 "aic79xx: Please update the aic79xx_tag_info array in\n"
1375 "aic79xx: the aic79xx_osm.c source file.\n");
1376                                 warned_user++;
1377                         }
1378                         tags = AHD_MAX_QUEUE;
1379                 } else {
1380                         adapter_tag_info_t *tag_info;
1381
1382                         tag_info = &aic79xx_tag_info[ahd->unit];
1383                         tags = tag_info->tag_commands[devinfo->target_offset];
1384                         if (tags > AHD_MAX_QUEUE)
1385                                 tags = AHD_MAX_QUEUE;
1386                 }
1387         }
1388         return (tags);
1389 }
1390
1391 /*
1392  * Determines the queue depth for a given device.
1393  */
1394 static void
1395 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1396 {
1397         struct  ahd_devinfo devinfo;
1398         u_int   tags;
1399         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1400
1401         ahd_compile_devinfo(&devinfo,
1402                             ahd->our_id,
1403                             sdev->sdev_target->id, sdev->lun,
1404                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1405                             ROLE_INITIATOR);
1406         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1407         if (tags != 0 && sdev->tagged_supported != 0) {
1408
1409                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1410                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1411                                devinfo.lun, AC_TRANSFER_NEG);
1412                 ahd_print_devinfo(ahd, &devinfo);
1413                 printf("Tagged Queuing enabled.  Depth %d\n", tags);
1414         } else {
1415                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1416                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1417                                devinfo.lun, AC_TRANSFER_NEG);
1418         }
1419 }
1420
1421 static int
1422 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1423                       struct scsi_cmnd *cmd)
1424 {
1425         struct   scb *scb;
1426         struct   hardware_scb *hscb;
1427         struct   ahd_initiator_tinfo *tinfo;
1428         struct   ahd_tmode_tstate *tstate;
1429         u_int    col_idx;
1430         uint16_t mask;
1431         unsigned long flags;
1432
1433         ahd_lock(ahd, &flags);
1434
1435         /*
1436          * Get an scb to use.
1437          */
1438         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1439                                     cmd->device->id, &tstate);
1440         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1441          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1442                 col_idx = AHD_NEVER_COL_IDX;
1443         } else {
1444                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1445                                             cmd->device->lun);
1446         }
1447         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1448                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1449                 ahd_unlock(ahd, &flags);
1450                 return SCSI_MLQUEUE_HOST_BUSY;
1451         }
1452
1453         scb->io_ctx = cmd;
1454         scb->platform_data->dev = dev;
1455         hscb = scb->hscb;
1456         cmd->host_scribble = (char *)scb;
1457
1458         /*
1459          * Fill out basics of the HSCB.
1460          */
1461         hscb->control = 0;
1462         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1463         hscb->lun = cmd->device->lun;
1464         scb->hscb->task_management = 0;
1465         mask = SCB_GET_TARGET_MASK(ahd, scb);
1466
1467         if ((ahd->user_discenable & mask) != 0)
1468                 hscb->control |= DISCENB;
1469
1470         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1471                 scb->flags |= SCB_PACKETIZED;
1472
1473         if ((tstate->auto_negotiate & mask) != 0) {
1474                 scb->flags |= SCB_AUTO_NEGOTIATE;
1475                 scb->hscb->control |= MK_MESSAGE;
1476         }
1477
1478         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1479                 int     msg_bytes;
1480                 uint8_t tag_msgs[2];
1481
1482                 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1483                 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1484                         hscb->control |= tag_msgs[0];
1485                         if (tag_msgs[0] == MSG_ORDERED_TASK)
1486                                 dev->commands_since_idle_or_otag = 0;
1487                 } else
1488                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1489                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1490                         hscb->control |= MSG_ORDERED_TASK;
1491                         dev->commands_since_idle_or_otag = 0;
1492                 } else {
1493                         hscb->control |= MSG_SIMPLE_TASK;
1494                 }
1495         }
1496
1497         hscb->cdb_len = cmd->cmd_len;
1498         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1499
1500         scb->platform_data->xfer_len = 0;
1501         ahd_set_residual(scb, 0);
1502         ahd_set_sense_residual(scb, 0);
1503         scb->sg_count = 0;
1504         if (cmd->use_sg != 0) {
1505                 void    *sg;
1506                 struct   scatterlist *cur_seg;
1507                 u_int    nseg;
1508                 int      dir;
1509
1510                 cur_seg = (struct scatterlist *)cmd->request_buffer;
1511                 dir = cmd->sc_data_direction;
1512                 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1513                                   cmd->use_sg, dir);
1514                 scb->platform_data->xfer_len = 0;
1515                 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1516                         dma_addr_t addr;
1517                         bus_size_t len;
1518
1519                         addr = sg_dma_address(cur_seg);
1520                         len = sg_dma_len(cur_seg);
1521                         scb->platform_data->xfer_len += len;
1522                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1523                                           /*last*/nseg == 1);
1524                 }
1525         } else if (cmd->request_bufflen != 0) {
1526                 void *sg;
1527                 dma_addr_t addr;
1528                 int dir;
1529
1530                 sg = scb->sg_list;
1531                 dir = cmd->sc_data_direction;
1532                 addr = pci_map_single(ahd->dev_softc,
1533                                       cmd->request_buffer,
1534                                       cmd->request_bufflen, dir);
1535                 scb->platform_data->xfer_len = cmd->request_bufflen;
1536                 scb->platform_data->buf_busaddr = addr;
1537                 sg = ahd_sg_setup(ahd, scb, sg, addr,
1538                                   cmd->request_bufflen, /*last*/TRUE);
1539         }
1540
1541         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1542         dev->openings--;
1543         dev->active++;
1544         dev->commands_issued++;
1545
1546         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1547                 dev->commands_since_idle_or_otag++;
1548         scb->flags |= SCB_ACTIVE;
1549         ahd_queue_scb(ahd, scb);
1550
1551         ahd_unlock(ahd, &flags);
1552
1553         return 0;
1554 }
1555
1556 /*
1557  * SCSI controller interrupt handler.
1558  */
1559 irqreturn_t
1560 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1561 {
1562         struct  ahd_softc *ahd;
1563         u_long  flags;
1564         int     ours;
1565
1566         ahd = (struct ahd_softc *) dev_id;
1567         ahd_lock(ahd, &flags);
1568         ours = ahd_intr(ahd);
1569         ahd_unlock(ahd, &flags);
1570         return IRQ_RETVAL(ours);
1571 }
1572
1573 void
1574 ahd_send_async(struct ahd_softc *ahd, char channel,
1575                u_int target, u_int lun, ac_code code)
1576 {
1577         switch (code) {
1578         case AC_TRANSFER_NEG:
1579         {
1580                 char    buf[80];
1581                 struct  scsi_target *starget;
1582                 struct  info_str info;
1583                 struct  ahd_initiator_tinfo *tinfo;
1584                 struct  ahd_tmode_tstate *tstate;
1585                 unsigned int target_ppr_options;
1586
1587                 BUG_ON(target == CAM_TARGET_WILDCARD);
1588
1589                 info.buffer = buf;
1590                 info.length = sizeof(buf);
1591                 info.offset = 0;
1592                 info.pos = 0;
1593                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1594                                             target, &tstate);
1595
1596                 /*
1597                  * Don't bother reporting results while
1598                  * negotiations are still pending.
1599                  */
1600                 if (tinfo->curr.period != tinfo->goal.period
1601                  || tinfo->curr.width != tinfo->goal.width
1602                  || tinfo->curr.offset != tinfo->goal.offset
1603                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1604                         if (bootverbose == 0)
1605                                 break;
1606
1607                 /*
1608                  * Don't bother reporting results that
1609                  * are identical to those last reported.
1610                  */
1611                 starget = ahd->platform_data->starget[target];
1612                 if (starget == NULL)
1613                         break;
1614
1615                 target_ppr_options =
1616                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1617                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1618                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1619                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1620                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1621                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1622                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1623                         + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1624
1625                 if (tinfo->curr.period == spi_period(starget)
1626                     && tinfo->curr.width == spi_width(starget)
1627                     && tinfo->curr.offset == spi_offset(starget)
1628                  && tinfo->curr.ppr_options == target_ppr_options)
1629                         if (bootverbose == 0)
1630                                 break;
1631
1632                 spi_period(starget) = tinfo->curr.period;
1633                 spi_width(starget) = tinfo->curr.width;
1634                 spi_offset(starget) = tinfo->curr.offset;
1635                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1636                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1637                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1638                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1639                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1640                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1641                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1642                 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1643                 spi_display_xfer_agreement(starget);
1644                 break;
1645         }
1646         case AC_SENT_BDR:
1647         {
1648                 WARN_ON(lun != CAM_LUN_WILDCARD);
1649                 scsi_report_device_reset(ahd->platform_data->host,
1650                                          channel - 'A', target);
1651                 break;
1652         }
1653         case AC_BUS_RESET:
1654                 if (ahd->platform_data->host != NULL) {
1655                         scsi_report_bus_reset(ahd->platform_data->host,
1656                                               channel - 'A');
1657                 }
1658                 break;
1659         default:
1660                 panic("ahd_send_async: Unexpected async event");
1661         }
1662 }
1663
1664 /*
1665  * Calls the higher level scsi done function and frees the scb.
1666  */
1667 void
1668 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1669 {
1670         struct scsi_cmnd *cmd;
1671         struct    ahd_linux_device *dev;
1672
1673         if ((scb->flags & SCB_ACTIVE) == 0) {
1674                 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1675                 ahd_dump_card_state(ahd);
1676                 panic("Stopping for safety");
1677         }
1678         LIST_REMOVE(scb, pending_links);
1679         cmd = scb->io_ctx;
1680         dev = scb->platform_data->dev;
1681         dev->active--;
1682         dev->openings++;
1683         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1684                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1685                 dev->qfrozen--;
1686         }
1687         ahd_linux_unmap_scb(ahd, scb);
1688
1689         /*
1690          * Guard against stale sense data.
1691          * The Linux mid-layer assumes that sense
1692          * was retrieved anytime the first byte of
1693          * the sense buffer looks "sane".
1694          */
1695         cmd->sense_buffer[0] = 0;
1696         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1697                 uint32_t amount_xferred;
1698
1699                 amount_xferred =
1700                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1701                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1702 #ifdef AHD_DEBUG
1703                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1704                                 ahd_print_path(ahd, scb);
1705                                 printf("Set CAM_UNCOR_PARITY\n");
1706                         }
1707 #endif
1708                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1709 #ifdef AHD_REPORT_UNDERFLOWS
1710                 /*
1711                  * This code is disabled by default as some
1712                  * clients of the SCSI system do not properly
1713                  * initialize the underflow parameter.  This
1714                  * results in spurious termination of commands
1715                  * that complete as expected (e.g. underflow is
1716                  * allowed as command can return variable amounts
1717                  * of data.
1718                  */
1719                 } else if (amount_xferred < scb->io_ctx->underflow) {
1720                         u_int i;
1721
1722                         ahd_print_path(ahd, scb);
1723                         printf("CDB:");
1724                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1725                                 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1726                         printf("\n");
1727                         ahd_print_path(ahd, scb);
1728                         printf("Saw underflow (%ld of %ld bytes). "
1729                                "Treated as error\n",
1730                                 ahd_get_residual(scb),
1731                                 ahd_get_transfer_length(scb));
1732                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1733 #endif
1734                 } else {
1735                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1736                 }
1737         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1738                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1739         }
1740
1741         if (dev->openings == 1
1742          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1743          && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1744                 dev->tag_success_count++;
1745         /*
1746          * Some devices deal with temporary internal resource
1747          * shortages by returning queue full.  When the queue
1748          * full occurrs, we throttle back.  Slowly try to get
1749          * back to our previous queue depth.
1750          */
1751         if ((dev->openings + dev->active) < dev->maxtags
1752          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1753                 dev->tag_success_count = 0;
1754                 dev->openings++;
1755         }
1756
1757         if (dev->active == 0)
1758                 dev->commands_since_idle_or_otag = 0;
1759
1760         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1761                 printf("Recovery SCB completes\n");
1762                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1763                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1764                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1765
1766                 if (ahd->platform_data->eh_done)
1767                         complete(ahd->platform_data->eh_done);
1768         }
1769
1770         ahd_free_scb(ahd, scb);
1771         ahd_linux_queue_cmd_complete(ahd, cmd);
1772 }
1773
1774 static void
1775 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1776                              struct scsi_device *sdev, struct scb *scb)
1777 {
1778         struct  ahd_devinfo devinfo;
1779         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1780
1781         ahd_compile_devinfo(&devinfo,
1782                             ahd->our_id,
1783                             sdev->sdev_target->id, sdev->lun,
1784                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1785                             ROLE_INITIATOR);
1786
1787         /*
1788          * We don't currently trust the mid-layer to
1789          * properly deal with queue full or busy.  So,
1790          * when one occurs, we tell the mid-layer to
1791          * unconditionally requeue the command to us
1792          * so that we can retry it ourselves.  We also
1793          * implement our own throttling mechanism so
1794          * we don't clobber the device with too many
1795          * commands.
1796          */
1797         switch (ahd_get_scsi_status(scb)) {
1798         default:
1799                 break;
1800         case SCSI_STATUS_CHECK_COND:
1801         case SCSI_STATUS_CMD_TERMINATED:
1802         {
1803                 struct scsi_cmnd *cmd;
1804
1805                 /*
1806                  * Copy sense information to the OS's cmd
1807                  * structure if it is available.
1808                  */
1809                 cmd = scb->io_ctx;
1810                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1811                         struct scsi_status_iu_header *siu;
1812                         u_int sense_size;
1813                         u_int sense_offset;
1814
1815                         if (scb->flags & SCB_SENSE) {
1816                                 sense_size = MIN(sizeof(struct scsi_sense_data)
1817                                                - ahd_get_sense_residual(scb),
1818                                                  sizeof(cmd->sense_buffer));
1819                                 sense_offset = 0;
1820                         } else {
1821                                 /*
1822                                  * Copy only the sense data into the provided
1823                                  * buffer.
1824                                  */
1825                                 siu = (struct scsi_status_iu_header *)
1826                                     scb->sense_data;
1827                                 sense_size = MIN(scsi_4btoul(siu->sense_length),
1828                                                 sizeof(cmd->sense_buffer));
1829                                 sense_offset = SIU_SENSE_OFFSET(siu);
1830                         }
1831
1832                         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1833                         memcpy(cmd->sense_buffer,
1834                                ahd_get_sense_buf(ahd, scb)
1835                                + sense_offset, sense_size);
1836                         cmd->result |= (DRIVER_SENSE << 24);
1837
1838 #ifdef AHD_DEBUG
1839                         if (ahd_debug & AHD_SHOW_SENSE) {
1840                                 int i;
1841
1842                                 printf("Copied %d bytes of sense data at %d:",
1843                                        sense_size, sense_offset);
1844                                 for (i = 0; i < sense_size; i++) {
1845                                         if ((i & 0xF) == 0)
1846                                                 printf("\n");
1847                                         printf("0x%x ", cmd->sense_buffer[i]);
1848                                 }
1849                                 printf("\n");
1850                         }
1851 #endif
1852                 }
1853                 break;
1854         }
1855         case SCSI_STATUS_QUEUE_FULL:
1856                 /*
1857                  * By the time the core driver has returned this
1858                  * command, all other commands that were queued
1859                  * to us but not the device have been returned.
1860                  * This ensures that dev->active is equal to
1861                  * the number of commands actually queued to
1862                  * the device.
1863                  */
1864                 dev->tag_success_count = 0;
1865                 if (dev->active != 0) {
1866                         /*
1867                          * Drop our opening count to the number
1868                          * of commands currently outstanding.
1869                          */
1870                         dev->openings = 0;
1871 #ifdef AHD_DEBUG
1872                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1873                                 ahd_print_path(ahd, scb);
1874                                 printf("Dropping tag count to %d\n",
1875                                        dev->active);
1876                         }
1877 #endif
1878                         if (dev->active == dev->tags_on_last_queuefull) {
1879
1880                                 dev->last_queuefull_same_count++;
1881                                 /*
1882                                  * If we repeatedly see a queue full
1883                                  * at the same queue depth, this
1884                                  * device has a fixed number of tag
1885                                  * slots.  Lock in this tag depth
1886                                  * so we stop seeing queue fulls from
1887                                  * this device.
1888                                  */
1889                                 if (dev->last_queuefull_same_count
1890                                  == AHD_LOCK_TAGS_COUNT) {
1891                                         dev->maxtags = dev->active;
1892                                         ahd_print_path(ahd, scb);
1893                                         printf("Locking max tag count at %d\n",
1894                                                dev->active);
1895                                 }
1896                         } else {
1897                                 dev->tags_on_last_queuefull = dev->active;
1898                                 dev->last_queuefull_same_count = 0;
1899                         }
1900                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1901                         ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1902                         ahd_platform_set_tags(ahd, sdev, &devinfo,
1903                                      (dev->flags & AHD_DEV_Q_BASIC)
1904                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1905                         break;
1906                 }
1907                 /*
1908                  * Drop down to a single opening, and treat this
1909                  * as if the target returned BUSY SCSI status.
1910                  */
1911                 dev->openings = 1;
1912                 ahd_platform_set_tags(ahd, sdev, &devinfo,
1913                              (dev->flags & AHD_DEV_Q_BASIC)
1914                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1915                 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1916         }
1917 }
1918
1919 static void
1920 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1921 {
1922         int status;
1923         int new_status = DID_OK;
1924         int do_fallback = 0;
1925         int scsi_status;
1926
1927         /*
1928          * Map CAM error codes into Linux Error codes.  We
1929          * avoid the conversion so that the DV code has the
1930          * full error information available when making
1931          * state change decisions.
1932          */
1933
1934         status = ahd_cmd_get_transaction_status(cmd);
1935         switch (status) {
1936         case CAM_REQ_INPROG:
1937         case CAM_REQ_CMP:
1938                 new_status = DID_OK;
1939                 break;
1940         case CAM_AUTOSENSE_FAIL:
1941                 new_status = DID_ERROR;
1942                 /* Fallthrough */
1943         case CAM_SCSI_STATUS_ERROR:
1944                 scsi_status = ahd_cmd_get_scsi_status(cmd);
1945
1946                 switch(scsi_status) {
1947                 case SCSI_STATUS_CMD_TERMINATED:
1948                 case SCSI_STATUS_CHECK_COND:
1949                         if ((cmd->result >> 24) != DRIVER_SENSE) {
1950                                 do_fallback = 1;
1951                         } else {
1952                                 struct scsi_sense_data *sense;
1953
1954                                 sense = (struct scsi_sense_data *)
1955                                         &cmd->sense_buffer;
1956                                 if (sense->extra_len >= 5 &&
1957                                     (sense->add_sense_code == 0x47
1958                                      || sense->add_sense_code == 0x48))
1959                                         do_fallback = 1;
1960                         }
1961                         break;
1962                 default:
1963                         break;
1964                 }
1965                 break;
1966         case CAM_REQ_ABORTED:
1967                 new_status = DID_ABORT;
1968                 break;
1969         case CAM_BUSY:
1970                 new_status = DID_BUS_BUSY;
1971                 break;
1972         case CAM_REQ_INVALID:
1973         case CAM_PATH_INVALID:
1974                 new_status = DID_BAD_TARGET;
1975                 break;
1976         case CAM_SEL_TIMEOUT:
1977                 new_status = DID_NO_CONNECT;
1978                 break;
1979         case CAM_SCSI_BUS_RESET:
1980         case CAM_BDR_SENT:
1981                 new_status = DID_RESET;
1982                 break;
1983         case CAM_UNCOR_PARITY:
1984                 new_status = DID_PARITY;
1985                 do_fallback = 1;
1986                 break;
1987         case CAM_CMD_TIMEOUT:
1988                 new_status = DID_TIME_OUT;
1989                 do_fallback = 1;
1990                 break;
1991         case CAM_REQ_CMP_ERR:
1992         case CAM_UNEXP_BUSFREE:
1993         case CAM_DATA_RUN_ERR:
1994                 new_status = DID_ERROR;
1995                 do_fallback = 1;
1996                 break;
1997         case CAM_UA_ABORT:
1998         case CAM_NO_HBA:
1999         case CAM_SEQUENCE_FAIL:
2000         case CAM_CCB_LEN_ERR:
2001         case CAM_PROVIDE_FAIL:
2002         case CAM_REQ_TERMIO:
2003         case CAM_UNREC_HBA_ERROR:
2004         case CAM_REQ_TOO_BIG:
2005                 new_status = DID_ERROR;
2006                 break;
2007         case CAM_REQUEUE_REQ:
2008                 new_status = DID_REQUEUE;
2009                 break;
2010         default:
2011                 /* We should never get here */
2012                 new_status = DID_ERROR;
2013                 break;
2014         }
2015
2016         if (do_fallback) {
2017                 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2018                        ahd_name(ahd), status, cmd->device->channel,
2019                        cmd->device->id, cmd->device->lun);
2020         }
2021
2022         ahd_cmd_set_transaction_status(cmd, new_status);
2023
2024         cmd->scsi_done(cmd);
2025 }
2026
2027 void
2028 ahd_freeze_simq(struct ahd_softc *ahd)
2029 {
2030         scsi_block_requests(ahd->platform_data->host);
2031 }
2032
2033 void
2034 ahd_release_simq(struct ahd_softc *ahd)
2035 {
2036         scsi_unblock_requests(ahd->platform_data->host);
2037 }
2038
2039 static int
2040 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2041 {
2042         struct ahd_softc *ahd;
2043         struct ahd_linux_device *dev;
2044         struct scb *pending_scb;
2045         u_int  saved_scbptr;
2046         u_int  active_scbptr;
2047         u_int  last_phase;
2048         u_int  saved_scsiid;
2049         u_int  cdb_byte;
2050         int    retval;
2051         int    was_paused;
2052         int    paused;
2053         int    wait;
2054         int    disconnected;
2055         ahd_mode_state saved_modes;
2056         unsigned long flags;
2057
2058         pending_scb = NULL;
2059         paused = FALSE;
2060         wait = FALSE;
2061         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2062
2063         scmd_printk(KERN_INFO, cmd,
2064                     "Attempting to queue an ABORT message:");
2065
2066         printf("CDB:");
2067         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2068                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2069         printf("\n");
2070
2071         ahd_lock(ahd, &flags);
2072
2073         /*
2074          * First determine if we currently own this command.
2075          * Start by searching the device queue.  If not found
2076          * there, check the pending_scb list.  If not found
2077          * at all, and the system wanted us to just abort the
2078          * command, return success.
2079          */
2080         dev = scsi_transport_device_data(cmd->device);
2081
2082         if (dev == NULL) {
2083                 /*
2084                  * No target device for this command exists,
2085                  * so we must not still own the command.
2086                  */
2087                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2088                 retval = SUCCESS;
2089                 goto no_cmd;
2090         }
2091
2092         /*
2093          * See if we can find a matching cmd in the pending list.
2094          */
2095         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2096                 if (pending_scb->io_ctx == cmd)
2097                         break;
2098         }
2099
2100         if (pending_scb == NULL) {
2101                 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2102                 goto no_cmd;
2103         }
2104
2105         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2106                 /*
2107                  * We can't queue two recovery actions using the same SCB
2108                  */
2109                 retval = FAILED;
2110                 goto  done;
2111         }
2112
2113         /*
2114          * Ensure that the card doesn't do anything
2115          * behind our back.  Also make sure that we
2116          * didn't "just" miss an interrupt that would
2117          * affect this cmd.
2118          */
2119         was_paused = ahd_is_paused(ahd);
2120         ahd_pause_and_flushwork(ahd);
2121         paused = TRUE;
2122
2123         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2124                 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2125                 goto no_cmd;
2126         }
2127
2128         printf("%s: At time of recovery, card was %spaused\n",
2129                ahd_name(ahd), was_paused ? "" : "not ");
2130         ahd_dump_card_state(ahd);
2131
2132         disconnected = TRUE;
2133         if (ahd_search_qinfifo(ahd, cmd->device->id,
2134                                cmd->device->channel + 'A',
2135                                cmd->device->lun,
2136                                pending_scb->hscb->tag,
2137                                ROLE_INITIATOR, CAM_REQ_ABORTED,
2138                                SEARCH_COMPLETE) > 0) {
2139                 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2140                        ahd_name(ahd), cmd->device->channel,
2141                        cmd->device->id, cmd->device->lun);
2142                 retval = SUCCESS;
2143                 goto done;
2144         }
2145
2146         saved_modes = ahd_save_modes(ahd);
2147         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2148         last_phase = ahd_inb(ahd, LASTPHASE);
2149         saved_scbptr = ahd_get_scbptr(ahd);
2150         active_scbptr = saved_scbptr;
2151         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2152                 struct scb *bus_scb;
2153
2154                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2155                 if (bus_scb == pending_scb)
2156                         disconnected = FALSE;
2157         }
2158
2159         /*
2160          * At this point, pending_scb is the scb associated with the
2161          * passed in command.  That command is currently active on the
2162          * bus or is in the disconnected state.
2163          */
2164         saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2165         if (last_phase != P_BUSFREE
2166             && SCB_GET_TAG(pending_scb) == active_scbptr) {
2167
2168                 /*
2169                  * We're active on the bus, so assert ATN
2170                  * and hope that the target responds.
2171                  */
2172                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2173                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2174                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2175                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2176                 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2177                 wait = TRUE;
2178         } else if (disconnected) {
2179
2180                 /*
2181                  * Actually re-queue this SCB in an attempt
2182                  * to select the device before it reconnects.
2183                  */
2184                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2185                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2186                 pending_scb->hscb->cdb_len = 0;
2187                 pending_scb->hscb->task_attribute = 0;
2188                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2189
2190                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2191                         /*
2192                          * Mark the SCB has having an outstanding
2193                          * task management function.  Should the command
2194                          * complete normally before the task management
2195                          * function can be sent, the host will be notified
2196                          * to abort our requeued SCB.
2197                          */
2198                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2199                                  pending_scb->hscb->task_management);
2200                 } else {
2201                         /*
2202                          * If non-packetized, set the MK_MESSAGE control
2203                          * bit indicating that we desire to send a message.
2204                          * We also set the disconnected flag since there is
2205                          * no guarantee that our SCB control byte matches
2206                          * the version on the card.  We don't want the
2207                          * sequencer to abort the command thinking an
2208                          * unsolicited reselection occurred.
2209                          */
2210                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2211
2212                         /*
2213                          * The sequencer will never re-reference the
2214                          * in-core SCB.  To make sure we are notified
2215                          * during reslection, set the MK_MESSAGE flag in
2216                          * the card's copy of the SCB.
2217                          */
2218                         ahd_outb(ahd, SCB_CONTROL,
2219                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2220                 }
2221
2222                 /*
2223                  * Clear out any entries in the QINFIFO first
2224                  * so we are the next SCB for this target
2225                  * to run.
2226                  */
2227                 ahd_search_qinfifo(ahd, cmd->device->id,
2228                                    cmd->device->channel + 'A', cmd->device->lun,
2229                                    SCB_LIST_NULL, ROLE_INITIATOR,
2230                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2231                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2232                 ahd_set_scbptr(ahd, saved_scbptr);
2233                 ahd_print_path(ahd, pending_scb);
2234                 printf("Device is disconnected, re-queuing SCB\n");
2235                 wait = TRUE;
2236         } else {
2237                 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2238                 retval = FAILED;
2239                 goto done;
2240         }
2241
2242 no_cmd:
2243         /*
2244          * Our assumption is that if we don't have the command, no
2245          * recovery action was required, so we return success.  Again,
2246          * the semantics of the mid-layer recovery engine are not
2247          * well defined, so this may change in time.
2248          */
2249         retval = SUCCESS;
2250 done:
2251         if (paused)
2252                 ahd_unpause(ahd);
2253         if (wait) {
2254                 DECLARE_COMPLETION(done);
2255
2256                 ahd->platform_data->eh_done = &done;
2257                 ahd_unlock(ahd, &flags);
2258
2259                 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2260                 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2261                         ahd_lock(ahd, &flags);
2262                         ahd->platform_data->eh_done = NULL;
2263                         ahd_unlock(ahd, &flags);
2264                         printf("%s: Timer Expired (active %d)\n",
2265                                ahd_name(ahd), dev->active);
2266                         retval = FAILED;
2267                 }
2268                 printf("Recovery code awake\n");
2269         } else
2270                 ahd_unlock(ahd, &flags);
2271
2272         if (retval != SUCCESS)
2273                 printf("%s: Command abort returning 0x%x\n",
2274                        ahd_name(ahd), retval);
2275
2276         return retval;
2277 }
2278
2279 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2280 {
2281         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2282         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2283         struct ahd_devinfo devinfo;
2284         unsigned long flags;
2285
2286         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2287                             starget->channel + 'A', ROLE_INITIATOR);
2288         ahd_lock(ahd, &flags);
2289         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2290         ahd_unlock(ahd, &flags);
2291 }
2292
2293 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2294 {
2295         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2296         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2297         struct ahd_tmode_tstate *tstate;
2298         struct ahd_initiator_tinfo *tinfo
2299                 = ahd_fetch_transinfo(ahd,
2300                                       starget->channel + 'A',
2301                                       shost->this_id, starget->id, &tstate);
2302         struct ahd_devinfo devinfo;
2303         unsigned int ppr_options = tinfo->goal.ppr_options;
2304         unsigned int dt;
2305         unsigned long flags;
2306         unsigned long offset = tinfo->goal.offset;
2307
2308 #ifdef AHD_DEBUG
2309         if ((ahd_debug & AHD_SHOW_DV) != 0)
2310                 printf("%s: set period to %d\n", ahd_name(ahd), period);
2311 #endif
2312         if (offset == 0)
2313                 offset = MAX_OFFSET;
2314
2315         if (period < 8)
2316                 period = 8;
2317         if (period < 10) {
2318                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2319                 if (period == 8)
2320                         ppr_options |= MSG_EXT_PPR_IU_REQ;
2321         }
2322
2323         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2324
2325         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2326                             starget->channel + 'A', ROLE_INITIATOR);
2327
2328         /* all PPR requests apart from QAS require wide transfers */
2329         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2330                 if (spi_width(starget) == 0)
2331                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2332         }
2333
2334         ahd_find_syncrate(ahd, &period, &ppr_options,
2335                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2336
2337         ahd_lock(ahd, &flags);
2338         ahd_set_syncrate(ahd, &devinfo, period, offset,
2339                          ppr_options, AHD_TRANS_GOAL, FALSE);
2340         ahd_unlock(ahd, &flags);
2341 }
2342
2343 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2344 {
2345         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2346         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2347         struct ahd_tmode_tstate *tstate;
2348         struct ahd_initiator_tinfo *tinfo
2349                 = ahd_fetch_transinfo(ahd,
2350                                       starget->channel + 'A',
2351                                       shost->this_id, starget->id, &tstate);
2352         struct ahd_devinfo devinfo;
2353         unsigned int ppr_options = 0;
2354         unsigned int period = 0;
2355         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2356         unsigned long flags;
2357
2358 #ifdef AHD_DEBUG
2359         if ((ahd_debug & AHD_SHOW_DV) != 0)
2360                 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2361 #endif
2362
2363         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2364                             starget->channel + 'A', ROLE_INITIATOR);
2365         if (offset != 0) {
2366                 period = tinfo->goal.period;
2367                 ppr_options = tinfo->goal.ppr_options;
2368                 ahd_find_syncrate(ahd, &period, &ppr_options,
2369                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2370         }
2371
2372         ahd_lock(ahd, &flags);
2373         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2374                          AHD_TRANS_GOAL, FALSE);
2375         ahd_unlock(ahd, &flags);
2376 }
2377
2378 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2379 {
2380         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2381         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2382         struct ahd_tmode_tstate *tstate;
2383         struct ahd_initiator_tinfo *tinfo
2384                 = ahd_fetch_transinfo(ahd,
2385                                       starget->channel + 'A',
2386                                       shost->this_id, starget->id, &tstate);
2387         struct ahd_devinfo devinfo;
2388         unsigned int ppr_options = tinfo->goal.ppr_options
2389                 & ~MSG_EXT_PPR_DT_REQ;
2390         unsigned int period = tinfo->goal.period;
2391         unsigned int width = tinfo->goal.width;
2392         unsigned long flags;
2393
2394 #ifdef AHD_DEBUG
2395         if ((ahd_debug & AHD_SHOW_DV) != 0)
2396                 printf("%s: %s DT\n", ahd_name(ahd),
2397                        dt ? "enabling" : "disabling");
2398 #endif
2399         if (dt) {
2400                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2401                 if (!width)
2402                         ahd_linux_set_width(starget, 1);
2403         } else {
2404                 if (period <= 9)
2405                         period = 10; /* If resetting DT, period must be >= 25ns */
2406                 /* IU is invalid without DT set */
2407                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2408         }
2409         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2410                             starget->channel + 'A', ROLE_INITIATOR);
2411         ahd_find_syncrate(ahd, &period, &ppr_options,
2412                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2413
2414         ahd_lock(ahd, &flags);
2415         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2416                          ppr_options, AHD_TRANS_GOAL, FALSE);
2417         ahd_unlock(ahd, &flags);
2418 }
2419
2420 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2421 {
2422         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2423         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2424         struct ahd_tmode_tstate *tstate;
2425         struct ahd_initiator_tinfo *tinfo
2426                 = ahd_fetch_transinfo(ahd,
2427                                       starget->channel + 'A',
2428                                       shost->this_id, starget->id, &tstate);
2429         struct ahd_devinfo devinfo;
2430         unsigned int ppr_options = tinfo->goal.ppr_options
2431                 & ~MSG_EXT_PPR_QAS_REQ;
2432         unsigned int period = tinfo->goal.period;
2433         unsigned int dt;
2434         unsigned long flags;
2435
2436 #ifdef AHD_DEBUG
2437         if ((ahd_debug & AHD_SHOW_DV) != 0)
2438                 printf("%s: %s QAS\n", ahd_name(ahd),
2439                        qas ? "enabling" : "disabling");
2440 #endif
2441
2442         if (qas) {
2443                 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2444         }
2445
2446         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2447
2448         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2449                             starget->channel + 'A', ROLE_INITIATOR);
2450         ahd_find_syncrate(ahd, &period, &ppr_options,
2451                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2452
2453         ahd_lock(ahd, &flags);
2454         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2455                          ppr_options, AHD_TRANS_GOAL, FALSE);
2456         ahd_unlock(ahd, &flags);
2457 }
2458
2459 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2460 {
2461         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2462         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2463         struct ahd_tmode_tstate *tstate;
2464         struct ahd_initiator_tinfo *tinfo
2465                 = ahd_fetch_transinfo(ahd,
2466                                       starget->channel + 'A',
2467                                       shost->this_id, starget->id, &tstate);
2468         struct ahd_devinfo devinfo;
2469         unsigned int ppr_options = tinfo->goal.ppr_options
2470                 & ~MSG_EXT_PPR_IU_REQ;
2471         unsigned int period = tinfo->goal.period;
2472         unsigned int dt;
2473         unsigned long flags;
2474
2475 #ifdef AHD_DEBUG
2476         if ((ahd_debug & AHD_SHOW_DV) != 0)
2477                 printf("%s: %s IU\n", ahd_name(ahd),
2478                        iu ? "enabling" : "disabling");
2479 #endif
2480
2481         if (iu) {
2482                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2483                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2484         }
2485
2486         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2487
2488         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2489                             starget->channel + 'A', ROLE_INITIATOR);
2490         ahd_find_syncrate(ahd, &period, &ppr_options,
2491                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2492
2493         ahd_lock(ahd, &flags);
2494         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2495                          ppr_options, AHD_TRANS_GOAL, FALSE);
2496         ahd_unlock(ahd, &flags);
2497 }
2498
2499 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2500 {
2501         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2502         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2503         struct ahd_tmode_tstate *tstate;
2504         struct ahd_initiator_tinfo *tinfo
2505                 = ahd_fetch_transinfo(ahd,
2506                                       starget->channel + 'A',
2507                                       shost->this_id, starget->id, &tstate);
2508         struct ahd_devinfo devinfo;
2509         unsigned int ppr_options = tinfo->goal.ppr_options
2510                 & ~MSG_EXT_PPR_RD_STRM;
2511         unsigned int period = tinfo->goal.period;
2512         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2513         unsigned long flags;
2514
2515 #ifdef AHD_DEBUG
2516         if ((ahd_debug & AHD_SHOW_DV) != 0)
2517                 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2518                        rdstrm  ? "enabling" : "disabling");
2519 #endif
2520
2521         if (rdstrm)
2522                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2523
2524         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2525                             starget->channel + 'A', ROLE_INITIATOR);
2526         ahd_find_syncrate(ahd, &period, &ppr_options,
2527                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2528
2529         ahd_lock(ahd, &flags);
2530         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2531                          ppr_options, AHD_TRANS_GOAL, FALSE);
2532         ahd_unlock(ahd, &flags);
2533 }
2534
2535 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2536 {
2537         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2538         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2539         struct ahd_tmode_tstate *tstate;
2540         struct ahd_initiator_tinfo *tinfo
2541                 = ahd_fetch_transinfo(ahd,
2542                                       starget->channel + 'A',
2543                                       shost->this_id, starget->id, &tstate);
2544         struct ahd_devinfo devinfo;
2545         unsigned int ppr_options = tinfo->goal.ppr_options
2546                 & ~MSG_EXT_PPR_WR_FLOW;
2547         unsigned int period = tinfo->goal.period;
2548         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2549         unsigned long flags;
2550
2551 #ifdef AHD_DEBUG
2552         if ((ahd_debug & AHD_SHOW_DV) != 0)
2553                 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2554                        wrflow ? "enabling" : "disabling");
2555 #endif
2556
2557         if (wrflow)
2558                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2559
2560         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2561                             starget->channel + 'A', ROLE_INITIATOR);
2562         ahd_find_syncrate(ahd, &period, &ppr_options,
2563                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2564
2565         ahd_lock(ahd, &flags);
2566         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2567                          ppr_options, AHD_TRANS_GOAL, FALSE);
2568         ahd_unlock(ahd, &flags);
2569 }
2570
2571 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2572 {
2573         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2574         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2575         struct ahd_tmode_tstate *tstate;
2576         struct ahd_initiator_tinfo *tinfo
2577                 = ahd_fetch_transinfo(ahd,
2578                                       starget->channel + 'A',
2579                                       shost->this_id, starget->id, &tstate);
2580         struct ahd_devinfo devinfo;
2581         unsigned int ppr_options = tinfo->goal.ppr_options
2582                 & ~MSG_EXT_PPR_RTI;
2583         unsigned int period = tinfo->goal.period;
2584         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2585         unsigned long flags;
2586
2587         if ((ahd->features & AHD_RTI) == 0) {
2588 #ifdef AHD_DEBUG
2589                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2590                         printf("%s: RTI not available\n", ahd_name(ahd));
2591 #endif
2592                 return;
2593         }
2594
2595 #ifdef AHD_DEBUG
2596         if ((ahd_debug & AHD_SHOW_DV) != 0)
2597                 printf("%s: %s RTI\n", ahd_name(ahd),
2598                        rti ? "enabling" : "disabling");
2599 #endif
2600
2601         if (rti)
2602                 ppr_options |= MSG_EXT_PPR_RTI;
2603
2604         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2605                             starget->channel + 'A', ROLE_INITIATOR);
2606         ahd_find_syncrate(ahd, &period, &ppr_options,
2607                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2608
2609         ahd_lock(ahd, &flags);
2610         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2611                          ppr_options, AHD_TRANS_GOAL, FALSE);
2612         ahd_unlock(ahd, &flags);
2613 }
2614
2615 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2616 {
2617         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2618         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2619         struct ahd_tmode_tstate *tstate;
2620         struct ahd_initiator_tinfo *tinfo
2621                 = ahd_fetch_transinfo(ahd,
2622                                       starget->channel + 'A',
2623                                       shost->this_id, starget->id, &tstate);
2624         struct ahd_devinfo devinfo;
2625         unsigned int ppr_options = tinfo->goal.ppr_options
2626                 & ~MSG_EXT_PPR_PCOMP_EN;
2627         unsigned int period = tinfo->goal.period;
2628         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2629         unsigned long flags;
2630
2631 #ifdef AHD_DEBUG
2632         if ((ahd_debug & AHD_SHOW_DV) != 0)
2633                 printf("%s: %s Precompensation\n", ahd_name(ahd),
2634                        pcomp ? "Enable" : "Disable");
2635 #endif
2636
2637         if (pcomp)
2638                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2639
2640         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2641                             starget->channel + 'A', ROLE_INITIATOR);
2642         ahd_find_syncrate(ahd, &period, &ppr_options,
2643                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2644
2645         ahd_lock(ahd, &flags);
2646         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2647                          ppr_options, AHD_TRANS_GOAL, FALSE);
2648         ahd_unlock(ahd, &flags);
2649 }
2650
2651 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2652 {
2653         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2654         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2655         struct ahd_tmode_tstate *tstate;
2656         struct ahd_initiator_tinfo *tinfo
2657                 = ahd_fetch_transinfo(ahd,
2658                                       starget->channel + 'A',
2659                                       shost->this_id, starget->id, &tstate);
2660         struct ahd_devinfo devinfo;
2661         unsigned int ppr_options = tinfo->goal.ppr_options
2662                 & ~MSG_EXT_PPR_HOLD_MCS;
2663         unsigned int period = tinfo->goal.period;
2664         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2665         unsigned long flags;
2666
2667         if (hold)
2668                 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2669
2670         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2671                             starget->channel + 'A', ROLE_INITIATOR);
2672         ahd_find_syncrate(ahd, &period, &ppr_options,
2673                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2674
2675         ahd_lock(ahd, &flags);
2676         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2677                          ppr_options, AHD_TRANS_GOAL, FALSE);
2678         ahd_unlock(ahd, &flags);
2679 }
2680
2681
2682
2683 static struct spi_function_template ahd_linux_transport_functions = {
2684         .set_offset     = ahd_linux_set_offset,
2685         .show_offset    = 1,
2686         .set_period     = ahd_linux_set_period,
2687         .show_period    = 1,
2688         .set_width      = ahd_linux_set_width,
2689         .show_width     = 1,
2690         .set_dt         = ahd_linux_set_dt,
2691         .show_dt        = 1,
2692         .set_iu         = ahd_linux_set_iu,
2693         .show_iu        = 1,
2694         .set_qas        = ahd_linux_set_qas,
2695         .show_qas       = 1,
2696         .set_rd_strm    = ahd_linux_set_rd_strm,
2697         .show_rd_strm   = 1,
2698         .set_wr_flow    = ahd_linux_set_wr_flow,
2699         .show_wr_flow   = 1,
2700         .set_rti        = ahd_linux_set_rti,
2701         .show_rti       = 1,
2702         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2703         .show_pcomp_en  = 1,
2704         .set_hold_mcs   = ahd_linux_set_hold_mcs,
2705         .show_hold_mcs  = 1,
2706 };
2707
2708 static int __init
2709 ahd_linux_init(void)
2710 {
2711         int     error = 0;
2712
2713         /*
2714          * If we've been passed any parameters, process them now.
2715          */
2716         if (aic79xx)
2717                 aic79xx_setup(aic79xx);
2718
2719         ahd_linux_transport_template =
2720                 spi_attach_transport(&ahd_linux_transport_functions);
2721         if (!ahd_linux_transport_template)
2722                 return -ENODEV;
2723
2724         scsi_transport_reserve_device(ahd_linux_transport_template,
2725                                       sizeof(struct ahd_linux_device));
2726
2727         error = ahd_linux_pci_init();
2728         if (error)
2729                 spi_release_transport(ahd_linux_transport_template);
2730         return error;
2731 }
2732
2733 static void __exit
2734 ahd_linux_exit(void)
2735 {
2736         ahd_linux_pci_exit();
2737         spi_release_transport(ahd_linux_transport_template);
2738 }
2739
2740 module_init(ahd_linux_init);
2741 module_exit(ahd_linux_exit);