drivers/scsi/aic7xxx/aic79xx_osm.c

   1 /*
   2  * Adaptec AIC79xx device driver for Linux.
   3  *
   4  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
   5  *
   6  * --------------------------------------------------------------------------
   7  * Copyright (c) 1994-2000 Justin T. Gibbs.
   8  * Copyright (c) 1997-1999 Doug Ledford
   9  * Copyright (c) 2000-2003 Adaptec Inc.
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions, and the following disclaimer,
  17  *    without modification.
  18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19  *    substantially similar to the "NO WARRANTY" disclaimer below
  20  *    ("Disclaimer") and any redistribution must be conditioned upon
  21  *    including a substantially similar Disclaimer requirement for further
  22  *    binary redistribution.
  23  * 3. Neither the names of the above-listed copyright holders nor the names
  24  *    of any contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * Alternatively, this software may be distributed under the terms of the
  28  * GNU General Public License ("GPL") version 2 as published by the Free
  29  * Software Foundation.
  30  *
  31  * NO WARRANTY
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGES.
  43  */
  44
  45 #include "aic79xx_osm.h"
  46 #include "aic79xx_inline.h"
  47 #include <scsi/scsicam.h>
  48
  49 static struct scsi_transport_template *ahd_linux_transport_template = NULL;
  50
  51 #include <linux/init.h>         /* __setup */
  52 #include <linux/mm.h>           /* For fetching system memory size */
  53 #include <linux/blkdev.h>               /* For block_size() */
  54 #include <linux/delay.h>        /* For ssleep/msleep */
  55 #include <linux/device.h>
  56
  57 /*
  58  * Bucket size for counting good commands in between bad ones.
  59  */
  60 #define AHD_LINUX_ERR_THRESH    1000
  61
  62 /*
  63  * Set this to the delay in seconds after SCSI bus reset.
  64  * Note, we honor this only for the initial bus reset.
  65  * The scsi error recovery code performs its own bus settle
  66  * delay handling for error recovery actions.
  67  */
  68 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
  69 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
  70 #else
  71 #define AIC79XX_RESET_DELAY 5000
  72 #endif
  73
  74 /*
  75  * To change the default number of tagged transactions allowed per-device,
  76  * add a line to the lilo.conf file like:
  77  * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
  78  * which will result in the first four devices on the first two
  79  * controllers being set to a tagged queue depth of 32.
  80  *
  81  * The tag_commands is an array of 16 to allow for wide and twin adapters.
  82  * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
  83  * for channel 1.
  84  */
  85 typedef struct {
  86         uint16_t tag_commands[16];      /* Allow for wide/twin adapters. */
  87 } adapter_tag_info_t;
  88
  89 /*
  90  * Modify this as you see fit for your system.
  91  *
  92  * 0                    tagged queuing disabled
  93  * 1 <= n <= 253        n == max tags ever dispatched.
  94  *
  95  * The driver will throttle the number of commands dispatched to a
  96  * device if it returns queue full.  For devices with a fixed maximum
  97  * queue depth, the driver will eventually determine this depth and
  98  * lock it in (a console message is printed to indicate that a lock
  99  * has occurred).  On some devices, queue full is returned for a temporary
 100  * resource shortage.  These devices will return queue full at varying
 101  * depths.  The driver will throttle back when the queue fulls occur and
 102  * attempt to slowly increase the depth over time as the device recovers
 103  * from the resource shortage.
 104  *
 105  * In this example, the first line will disable tagged queueing for all
 106  * the devices on the first probed aic79xx adapter.
 107  *
 108  * The second line enables tagged queueing with 4 commands/LUN for IDs
 109  * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
 110  * driver to attempt to use up to 64 tags for ID 1.
 111  *
 112  * The third line is the same as the first line.
 113  *
 114  * The fourth line disables tagged queueing for devices 0 and 3.  It
 115  * enables tagged queueing for the other IDs, with 16 commands/LUN
 116  * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
 117  * IDs 2, 5-7, and 9-15.
 118  */
 119
 120 /*
 121  * NOTE: The below structure is for reference only, the actual structure
 122  *       to modify in order to change things is just below this comment block.
 123 adapter_tag_info_t aic79xx_tag_info[] =
 124 {
 125         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 126         {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
 127         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 128         {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
 129 };
 130 */
 131
 132 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
 133 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
 134 #else
 135 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
 136 #endif
 137
 138 #define AIC79XX_CONFIGED_TAG_COMMANDS {                                 \
 139         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 140         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 141         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 142         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 143         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 144         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 145         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 146         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE                \
 147 }
 148
 149 /*
 150  * By default, use the number of commands specified by
 151  * the users kernel configuration.
 152  */
 153 static adapter_tag_info_t aic79xx_tag_info[] =
 154 {
 155         {AIC79XX_CONFIGED_TAG_COMMANDS},
 156         {AIC79XX_CONFIGED_TAG_COMMANDS},
 157         {AIC79XX_CONFIGED_TAG_COMMANDS},
 158         {AIC79XX_CONFIGED_TAG_COMMANDS},
 159         {AIC79XX_CONFIGED_TAG_COMMANDS},
 160         {AIC79XX_CONFIGED_TAG_COMMANDS},
 161         {AIC79XX_CONFIGED_TAG_COMMANDS},
 162         {AIC79XX_CONFIGED_TAG_COMMANDS},
 163         {AIC79XX_CONFIGED_TAG_COMMANDS},
 164         {AIC79XX_CONFIGED_TAG_COMMANDS},
 165         {AIC79XX_CONFIGED_TAG_COMMANDS},
 166         {AIC79XX_CONFIGED_TAG_COMMANDS},
 167         {AIC79XX_CONFIGED_TAG_COMMANDS},
 168         {AIC79XX_CONFIGED_TAG_COMMANDS},
 169         {AIC79XX_CONFIGED_TAG_COMMANDS},
 170         {AIC79XX_CONFIGED_TAG_COMMANDS}
 171 };
 172
 173 /*
 174  * The I/O cell on the chip is very configurable in respect to its analog
 175  * characteristics.  Set the defaults here; they can be overriden with
 176  * the proper insmod parameters.
 177  */
 178 struct ahd_linux_iocell_opts
 179 {
 180         uint8_t precomp;
 181         uint8_t slewrate;
 182         uint8_t amplitude;
 183 };
 184 #define AIC79XX_DEFAULT_PRECOMP         0xFF
 185 #define AIC79XX_DEFAULT_SLEWRATE        0xFF
 186 #define AIC79XX_DEFAULT_AMPLITUDE       0xFF
 187 #define AIC79XX_DEFAULT_IOOPTS                  \
 188 {                                               \
 189         AIC79XX_DEFAULT_PRECOMP,                \
 190         AIC79XX_DEFAULT_SLEWRATE,               \
 191         AIC79XX_DEFAULT_AMPLITUDE               \
 192 }
 193 #define AIC79XX_PRECOMP_INDEX   0
 194 #define AIC79XX_SLEWRATE_INDEX  1
 195 #define AIC79XX_AMPLITUDE_INDEX 2
 196 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
 197 {
 198         AIC79XX_DEFAULT_IOOPTS,
 199         AIC79XX_DEFAULT_IOOPTS,
 200         AIC79XX_DEFAULT_IOOPTS,
 201         AIC79XX_DEFAULT_IOOPTS,
 202         AIC79XX_DEFAULT_IOOPTS,
 203         AIC79XX_DEFAULT_IOOPTS,
 204         AIC79XX_DEFAULT_IOOPTS,
 205         AIC79XX_DEFAULT_IOOPTS,
 206         AIC79XX_DEFAULT_IOOPTS,
 207         AIC79XX_DEFAULT_IOOPTS,
 208         AIC79XX_DEFAULT_IOOPTS,
 209         AIC79XX_DEFAULT_IOOPTS,
 210         AIC79XX_DEFAULT_IOOPTS,
 211         AIC79XX_DEFAULT_IOOPTS,
 212         AIC79XX_DEFAULT_IOOPTS,
 213         AIC79XX_DEFAULT_IOOPTS
 214 };
 215
 216 /*
 217  * There should be a specific return value for this in scsi.h, but
 218  * it seems that most drivers ignore it.
 219  */
 220 #define DID_UNDERFLOW   DID_ERROR
 221
 222 void
 223 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
 224 {
 225         printk("(scsi%d:%c:%d:%d): ",
 226                ahd->platform_data->host->host_no,
 227                scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
 228                scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
 229                scb != NULL ? SCB_GET_LUN(scb) : -1);
 230 }
 231
 232 /*
 233  * XXX - these options apply unilaterally to _all_ adapters
 234  *       cards in the system.  This should be fixed.  Exceptions to this
 235  *       rule are noted in the comments.
 236  */
 237
 238 /*
 239  * Skip the scsi bus reset.  Non 0 make us skip the reset at startup.  This
 240  * has no effect on any later resets that might occur due to things like
 241  * SCSI bus timeouts.
 242  */
 243 static uint32_t aic79xx_no_reset;
 244
 245 /*
 246  * Should we force EXTENDED translation on a controller.
 247  *     0 == Use whatever is in the SEEPROM or default to off
 248  *     1 == Use whatever is in the SEEPROM or default to on
 249  */
 250 static uint32_t aic79xx_extended;
 251
 252 /*
 253  * PCI bus parity checking of the Adaptec controllers.  This is somewhat
 254  * dubious at best.  To my knowledge, this option has never actually
 255  * solved a PCI parity problem, but on certain machines with broken PCI
 256  * chipset configurations, it can generate tons of false error messages.
 257  * It's included in the driver for completeness.
 258  *   0     = Shut off PCI parity check
 259  *   non-0 = Enable PCI parity check
 260  *
 261  * NOTE: you can't actually pass -1 on the lilo prompt.  So, to set this
 262  * variable to -1 you would actually want to simply pass the variable
 263  * name without a number.  That will invert the 0 which will result in
 264  * -1.
 265  */
 266 static uint32_t aic79xx_pci_parity = ~0;
 267
 268 /*
 269  * There are lots of broken chipsets in the world.  Some of them will
 270  * violate the PCI spec when we issue byte sized memory writes to our
 271  * controller.  I/O mapped register access, if allowed by the given
 272  * platform, will work in almost all cases.
 273  */
 274 uint32_t aic79xx_allow_memio = ~0;
 275
 276 /*
 277  * So that we can set how long each device is given as a selection timeout.
 278  * The table of values goes like this:
 279  *   0 - 256ms
 280  *   1 - 128ms
 281  *   2 - 64ms
 282  *   3 - 32ms
 283  * We default to 256ms because some older devices need a longer time
 284  * to respond to initial selection.
 285  */
 286 static uint32_t aic79xx_seltime;
 287
 288 /*
 289  * Certain devices do not perform any aging on commands.  Should the
 290  * device be saturated by commands in one portion of the disk, it is
 291  * possible for transactions on far away sectors to never be serviced.
 292  * To handle these devices, we can periodically send an ordered tag to
 293  * force all outstanding transactions to be serviced prior to a new
 294  * transaction.
 295  */
 296 static uint32_t aic79xx_periodic_otag;
 297
 298 /* Some storage boxes are using an LSI chip which has a bug making it
 299  * impossible to use aic79xx Rev B chip in 320 speeds.  The following
 300  * storage boxes have been reported to be buggy:
 301  * EonStor 3U 16-Bay: U16U-G3A3
 302  * EonStor 2U 12-Bay: U12U-G3A3
 303  * SentinelRAID: 2500F R5 / R6
 304  * SentinelRAID: 2500F R1
 305  * SentinelRAID: 2500F/1500F
 306  * SentinelRAID: 150F
 307  *
 308  * To get around this LSI bug, you can set your board to 160 mode
 309  * or you can enable the SLOWCRC bit.
 310  */
 311 uint32_t aic79xx_slowcrc;
 312
 313 /*
 314  * Module information and settable options.
 315  */
 316 static char *aic79xx = NULL;
 317
 318 MODULE_AUTHOR("Maintainer: 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 static void ahd_freeze_simq(struct ahd_softc *ahd);
 367 static void ahd_release_simq(struct ahd_softc *ahd);
 368
 369 static int ahd_linux_unit;
 370
 371
 372 /****************************** Inlines ***************************************/
 373 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
 374
 375 static __inline void
 376 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
 377 {
 378         struct scsi_cmnd *cmd;
 379         int direction;
 380
 381         cmd = scb->io_ctx;
 382         direction = cmd->sc_data_direction;
 383         ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
 384         if (cmd->use_sg != 0) {
 385                 struct scatterlist *sg;
 386
 387                 sg = (struct scatterlist *)cmd->request_buffer;
 388                 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
 389         } else if (cmd->request_bufflen != 0) {
 390                 pci_unmap_single(ahd->dev_softc,
 391                                  scb->platform_data->buf_busaddr,
 392                                  cmd->request_bufflen, direction);
 393         }
 394 }
 395
 396 /******************************** Macros **************************************/
 397 #define BUILD_SCSIID(ahd, cmd)                                          \
 398         (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
 399
 400 /*
 401  * Return a string describing the driver.
 402  */
 403 static const char *
 404 ahd_linux_info(struct Scsi_Host *host)
 405 {
 406         static char buffer[512];
 407         char    ahd_info[256];
 408         char   *bp;
 409         struct ahd_softc *ahd;
 410
 411         bp = &buffer[0];
 412         ahd = *(struct ahd_softc **)host->hostdata;
 413         memset(bp, 0, sizeof(buffer));
 414         strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
 415         strcat(bp, AIC79XX_DRIVER_VERSION);
 416         strcat(bp, "\n");
 417         strcat(bp, "        <");
 418         strcat(bp, ahd->description);
 419         strcat(bp, ">\n");
 420         strcat(bp, "        ");
 421         ahd_controller_info(ahd, ahd_info);
 422         strcat(bp, ahd_info);
 423
 424         return (bp);
 425 }
 426
 427 /*
 428  * Queue an SCB to the controller.
 429  */
 430 static int
 431 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 432 {
 433         struct   ahd_softc *ahd;
 434         struct   ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
 435         int rtn = SCSI_MLQUEUE_HOST_BUSY;
 436
 437         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 438
 439         cmd->scsi_done = scsi_done;
 440         cmd->result = CAM_REQ_INPROG << 16;
 441         rtn = ahd_linux_run_command(ahd, dev, cmd);
 442
 443         return rtn;
 444 }
 445
 446 static inline struct scsi_target **
 447 ahd_linux_target_in_softc(struct scsi_target *starget)
 448 {
 449         struct  ahd_softc *ahd =
 450                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 451         unsigned int target_offset;
 452
 453         target_offset = starget->id;
 454         if (starget->channel != 0)
 455                 target_offset += 8;
 456
 457         return &ahd->platform_data->starget[target_offset];
 458 }
 459
 460 static int
 461 ahd_linux_target_alloc(struct scsi_target *starget)
 462 {
 463         struct  ahd_softc *ahd =
 464                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 465         struct seeprom_config *sc = ahd->seep_config;
 466         unsigned long flags;
 467         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 468         struct ahd_devinfo devinfo;
 469         struct ahd_initiator_tinfo *tinfo;
 470         struct ahd_tmode_tstate *tstate;
 471         char channel = starget->channel + 'A';
 472
 473         ahd_lock(ahd, &flags);
 474
 475         BUG_ON(*ahd_targp != NULL);
 476
 477         *ahd_targp = starget;
 478
 479         if (sc) {
 480                 int flags = sc->device_flags[starget->id];
 481
 482                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 483                                             starget->id, &tstate);
 484
 485                 if ((flags  & CFPACKETIZED) == 0) {
 486                         /* Do not negotiate packetized transfers */
 487                         spi_rd_strm(starget) = 0;
 488                         spi_pcomp_en(starget) = 0;
 489                         spi_rti(starget) = 0;
 490                         spi_wr_flow(starget) = 0;
 491                         spi_hold_mcs(starget) = 0;
 492                 } else {
 493                         if ((ahd->features & AHD_RTI) == 0)
 494                                 spi_rti(starget) = 0;
 495                 }
 496
 497                 if ((flags & CFQAS) == 0)
 498                         spi_qas(starget) = 0;
 499
 500                 /* Transinfo values have been set to BIOS settings */
 501                 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
 502                 spi_min_period(starget) = tinfo->user.period;
 503                 spi_max_offset(starget) = tinfo->user.offset;
 504         }
 505
 506         tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
 507                                     starget->id, &tstate);
 508         ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
 509                             CAM_LUN_WILDCARD, channel,
 510                             ROLE_INITIATOR);
 511         ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
 512                          AHD_TRANS_GOAL, /*paused*/FALSE);
 513         ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
 514                       AHD_TRANS_GOAL, /*paused*/FALSE);
 515         ahd_unlock(ahd, &flags);
 516
 517         return 0;
 518 }
 519
 520 static void
 521 ahd_linux_target_destroy(struct scsi_target *starget)
 522 {
 523         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 524
 525         *ahd_targp = NULL;
 526 }
 527
 528 static int
 529 ahd_linux_slave_alloc(struct scsi_device *sdev)
 530 {
 531         struct  ahd_softc *ahd =
 532                 *((struct ahd_softc **)sdev->host->hostdata);
 533         struct ahd_linux_device *dev;
 534
 535         if (bootverbose)
 536                 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
 537
 538         dev = scsi_transport_device_data(sdev);
 539         memset(dev, 0, sizeof(*dev));
 540
 541         /*
 542          * We start out life using untagged
 543          * transactions of which we allow one.
 544          */
 545         dev->openings = 1;
 546
 547         /*
 548          * Set maxtags to 0.  This will be changed if we
 549          * later determine that we are dealing with
 550          * a tagged queuing capable device.
 551          */
 552         dev->maxtags = 0;
 553
 554         return (0);
 555 }
 556
 557 static int
 558 ahd_linux_slave_configure(struct scsi_device *sdev)
 559 {
 560         struct  ahd_softc *ahd;
 561
 562         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 563         if (bootverbose)
 564                 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
 565
 566         ahd_linux_device_queue_depth(sdev);
 567
 568         /* Initial Domain Validation */
 569         if (!spi_initial_dv(sdev->sdev_target))
 570                 spi_dv_device(sdev);
 571
 572         return 0;
 573 }
 574
 575 #if defined(__i386__)
 576 /*
 577  * Return the disk geometry for the given SCSI device.
 578  */
 579 static int
 580 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 581                     sector_t capacity, int geom[])
 582 {
 583         uint8_t *bh;
 584         int      heads;
 585         int      sectors;
 586         int      cylinders;
 587         int      ret;
 588         int      extended;
 589         struct   ahd_softc *ahd;
 590
 591         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 592
 593         bh = scsi_bios_ptable(bdev);
 594         if (bh) {
 595                 ret = scsi_partsize(bh, capacity,
 596                                     &geom[2], &geom[0], &geom[1]);
 597                 kfree(bh);
 598                 if (ret != -1)
 599                         return (ret);
 600         }
 601         heads = 64;
 602         sectors = 32;
 603         cylinders = aic_sector_div(capacity, heads, sectors);
 604
 605         if (aic79xx_extended != 0)
 606                 extended = 1;
 607         else
 608                 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
 609         if (extended && cylinders >= 1024) {
 610                 heads = 255;
 611                 sectors = 63;
 612                 cylinders = aic_sector_div(capacity, heads, sectors);
 613         }
 614         geom[0] = heads;
 615         geom[1] = sectors;
 616         geom[2] = cylinders;
 617         return (0);
 618 }
 619 #endif
 620
 621 /*
 622  * Abort the current SCSI command(s).
 623  */
 624 static int
 625 ahd_linux_abort(struct scsi_cmnd *cmd)
 626 {
 627         int error;
 628
 629         error = ahd_linux_queue_abort_cmd(cmd);
 630
 631         return error;
 632 }
 633
 634 /*
 635  * Attempt to send a target reset message to the device that timed out.
 636  */
 637 static int
 638 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
 639 {
 640         struct ahd_softc *ahd;
 641         struct ahd_linux_device *dev;
 642         struct scb *reset_scb;
 643         u_int  cdb_byte;
 644         int    retval = SUCCESS;
 645         int    paused;
 646         int    wait;
 647         struct  ahd_initiator_tinfo *tinfo;
 648         struct  ahd_tmode_tstate *tstate;
 649         unsigned long flags;
 650         DECLARE_COMPLETION_ONSTACK(done);
 651
 652         reset_scb = NULL;
 653         paused = FALSE;
 654         wait = FALSE;
 655         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 656
 657         scmd_printk(KERN_INFO, cmd,
 658                     "Attempting to queue a TARGET RESET message:");
 659
 660         printf("CDB:");
 661         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
 662                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
 663         printf("\n");
 664
 665         /*
 666          * Determine if we currently own this command.
 667          */
 668         dev = scsi_transport_device_data(cmd->device);
 669
 670         if (dev == NULL) {
 671                 /*
 672                  * No target device for this command exists,
 673                  * so we must not still own the command.
 674                  */
 675                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
 676                 return SUCCESS;
 677         }
 678
 679         /*
 680          * Generate us a new SCB
 681          */
 682         reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
 683         if (!reset_scb) {
 684                 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
 685                 return FAILED;
 686         }
 687
 688         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 689                                     cmd->device->id, &tstate);
 690         reset_scb->io_ctx = cmd;
 691         reset_scb->platform_data->dev = dev;
 692         reset_scb->sg_count = 0;
 693         ahd_set_residual(reset_scb, 0);
 694         ahd_set_sense_residual(reset_scb, 0);
 695         reset_scb->platform_data->xfer_len = 0;
 696         reset_scb->hscb->control = 0;
 697         reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
 698         reset_scb->hscb->lun = cmd->device->lun;
 699         reset_scb->hscb->cdb_len = 0;
 700         reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
 701         reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
 702         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 703                 reset_scb->flags |= SCB_PACKETIZED;
 704         } else {
 705                 reset_scb->hscb->control |= MK_MESSAGE;
 706         }
 707         dev->openings--;
 708         dev->active++;
 709         dev->commands_issued++;
 710
 711         ahd_lock(ahd, &flags);
 712
 713         LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
 714         ahd_queue_scb(ahd, reset_scb);
 715
 716         ahd->platform_data->eh_done = &done;
 717         ahd_unlock(ahd, &flags);
 718
 719         printf("%s: Device reset code sleeping\n", ahd_name(ahd));
 720         if (!wait_for_completion_timeout(&done, 5 * HZ)) {
 721                 ahd_lock(ahd, &flags);
 722                 ahd->platform_data->eh_done = NULL;
 723                 ahd_unlock(ahd, &flags);
 724                 printf("%s: Device reset timer expired (active %d)\n",
 725                        ahd_name(ahd), dev->active);
 726                 retval = FAILED;
 727         }
 728         printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
 729
 730         return (retval);
 731 }
 732
 733 /*
 734  * Reset the SCSI bus.
 735  */
 736 static int
 737 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 738 {
 739         struct ahd_softc *ahd;
 740         int    found;
 741         unsigned long flags;
 742
 743         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 744 #ifdef AHD_DEBUG
 745         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 746                 printf("%s: Bus reset called for cmd %p\n",
 747                        ahd_name(ahd), cmd);
 748 #endif
 749         ahd_lock(ahd, &flags);
 750
 751         found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 752                                   /*initiate reset*/TRUE);
 753         ahd_unlock(ahd, &flags);
 754
 755         if (bootverbose)
 756                 printf("%s: SCSI bus reset delivered. "
 757                        "%d SCBs aborted.\n", ahd_name(ahd), found);
 758
 759         return (SUCCESS);
 760 }
 761
 762 struct scsi_host_template aic79xx_driver_template = {
 763         .module                 = THIS_MODULE,
 764         .name                   = "aic79xx",
 765         .proc_name              = "aic79xx",
 766         .proc_info              = ahd_linux_proc_info,
 767         .info                   = ahd_linux_info,
 768         .queuecommand           = ahd_linux_queue,
 769         .eh_abort_handler       = ahd_linux_abort,
 770         .eh_device_reset_handler = ahd_linux_dev_reset,
 771         .eh_bus_reset_handler   = ahd_linux_bus_reset,
 772 #if defined(__i386__)
 773         .bios_param             = ahd_linux_biosparam,
 774 #endif
 775         .can_queue              = AHD_MAX_QUEUE,
 776         .this_id                = -1,
 777         .max_sectors            = 8192,
 778         .cmd_per_lun            = 2,
 779         .use_clustering         = ENABLE_CLUSTERING,
 780         .slave_alloc            = ahd_linux_slave_alloc,
 781         .slave_configure        = ahd_linux_slave_configure,
 782         .target_alloc           = ahd_linux_target_alloc,
 783         .target_destroy         = ahd_linux_target_destroy,
 784 };
 785
 786 /******************************** Bus DMA *************************************/
 787 int
 788 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
 789                    bus_size_t alignment, bus_size_t boundary,
 790                    dma_addr_t lowaddr, dma_addr_t highaddr,
 791                    bus_dma_filter_t *filter, void *filterarg,
 792                    bus_size_t maxsize, int nsegments,
 793                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
 794 {
 795         bus_dma_tag_t dmat;
 796
 797         dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
 798         if (dmat == NULL)
 799                 return (ENOMEM);
 800
 801         /*
 802          * Linux is very simplistic about DMA memory.  For now don't
 803          * maintain all specification information.  Once Linux supplies
 804          * better facilities for doing these operations, or the
 805          * needs of this particular driver change, we might need to do
 806          * more here.
 807          */
 808         dmat->alignment = alignment;
 809         dmat->boundary = boundary;
 810         dmat->maxsize = maxsize;
 811         *ret_tag = dmat;
 812         return (0);
 813 }
 814
 815 void
 816 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
 817 {
 818         free(dmat, M_DEVBUF);
 819 }
 820
 821 int
 822 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
 823                  int flags, bus_dmamap_t *mapp)
 824 {
 825         *vaddr = pci_alloc_consistent(ahd->dev_softc,
 826                                       dmat->maxsize, mapp);
 827         if (*vaddr == NULL)
 828                 return (ENOMEM);
 829         return(0);
 830 }
 831
 832 void
 833 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
 834                 void* vaddr, bus_dmamap_t map)
 835 {
 836         pci_free_consistent(ahd->dev_softc, dmat->maxsize,
 837                             vaddr, map);
 838 }
 839
 840 int
 841 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
 842                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
 843                 void *cb_arg, int flags)
 844 {
 845         /*
 846          * Assume for now that this will only be used during
 847          * initialization and not for per-transaction buffer mapping.
 848          */
 849         bus_dma_segment_t stack_sg;
 850
 851         stack_sg.ds_addr = map;
 852         stack_sg.ds_len = dmat->maxsize;
 853         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
 854         return (0);
 855 }
 856
 857 void
 858 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 859 {
 860 }
 861
 862 int
 863 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 864 {
 865         /* Nothing to do */
 866         return (0);
 867 }
 868
 869 /********************* Platform Dependent Functions ***************************/
 870 static void
 871 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
 872 {
 873
 874         if ((instance >= 0)
 875          && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
 876                 uint8_t *iocell_info;
 877
 878                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
 879                 iocell_info[index] = value & 0xFFFF;
 880                 if (bootverbose)
 881                         printf("iocell[%d:%ld] = %d\n", instance, index, value);
 882         }
 883 }
 884
 885 static void
 886 ahd_linux_setup_tag_info_global(char *p)
 887 {
 888         int tags, i, j;
 889
 890         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
 891         printf("Setting Global Tags= %d\n", tags);
 892
 893         for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
 894                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
 895                         aic79xx_tag_info[i].tag_commands[j] = tags;
 896                 }
 897         }
 898 }
 899
 900 static void
 901 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
 902 {
 903
 904         if ((instance >= 0) && (targ >= 0)
 905          && (instance < ARRAY_SIZE(aic79xx_tag_info))
 906          && (targ < AHD_NUM_TARGETS)) {
 907                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
 908                 if (bootverbose)
 909                         printf("tag_info[%d:%d] = %d\n", instance, targ, value);
 910         }
 911 }
 912
 913 static char *
 914 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
 915                        void (*callback)(u_long, int, int, int32_t),
 916                        u_long callback_arg)
 917 {
 918         char    *tok_end;
 919         char    *tok_end2;
 920         int      i;
 921         int      instance;
 922         int      targ;
 923         int      done;
 924         char     tok_list[] = {'.', ',', '{', '}', '\0'};
 925
 926         /* All options use a ':' name/arg separator */
 927         if (*opt_arg != ':')
 928                 return (opt_arg);
 929         opt_arg++;
 930         instance = -1;
 931         targ = -1;
 932         done = FALSE;
 933         /*
 934          * Restore separator that may be in
 935          * the middle of our option argument.
 936          */
 937         tok_end = strchr(opt_arg, '\0');
 938         if (tok_end < end)
 939                 *tok_end = ',';
 940         while (!done) {
 941                 switch (*opt_arg) {
 942                 case '{':
 943                         if (instance == -1) {
 944                                 instance = 0;
 945                         } else {
 946                                 if (depth > 1) {
 947                                         if (targ == -1)
 948                                                 targ = 0;
 949                                 } else {
 950                                         printf("Malformed Option %s\n",
 951                                                opt_name);
 952                                         done = TRUE;
 953                                 }
 954                         }
 955                         opt_arg++;
 956                         break;
 957                 case '}':
 958                         if (targ != -1)
 959                                 targ = -1;
 960                         else if (instance != -1)
 961                                 instance = -1;
 962                         opt_arg++;
 963                         break;
 964                 case ',':
 965                 case '.':
 966                         if (instance == -1)
 967                                 done = TRUE;
 968                         else if (targ >= 0)
 969                                 targ++;
 970                         else if (instance >= 0)
 971                                 instance++;
 972                         opt_arg++;
 973                         break;
 974                 case '\0':
 975                         done = TRUE;
 976                         break;
 977                 default:
 978                         tok_end = end;
 979                         for (i = 0; tok_list[i]; i++) {
 980                                 tok_end2 = strchr(opt_arg, tok_list[i]);
 981                                 if ((tok_end2) && (tok_end2 < tok_end))
 982                                         tok_end = tok_end2;
 983                         }
 984                         callback(callback_arg, instance, targ,
 985                                  simple_strtol(opt_arg, NULL, 0));
 986                         opt_arg = tok_end;
 987                         break;
 988                 }
 989         }
 990         return (opt_arg);
 991 }
 992
 993 /*
 994  * Handle Linux boot parameters. This routine allows for assigning a value
 995  * to a parameter with a ':' between the parameter and the value.
 996  * ie. aic79xx=stpwlev:1,extended
 997  */
 998 static int
 999 aic79xx_setup(char *s)
1000 {
1001         int     i, n;
1002         char   *p;
1003         char   *end;
1004
1005         static struct {
1006                 const char *name;
1007                 uint32_t *flag;
1008         } options[] = {
1009                 { "extended", &aic79xx_extended },
1010                 { "no_reset", &aic79xx_no_reset },
1011                 { "verbose", &aic79xx_verbose },
1012                 { "allow_memio", &aic79xx_allow_memio},
1013 #ifdef AHD_DEBUG
1014                 { "debug", &ahd_debug },
1015 #endif
1016                 { "periodic_otag", &aic79xx_periodic_otag },
1017                 { "pci_parity", &aic79xx_pci_parity },
1018                 { "seltime", &aic79xx_seltime },
1019                 { "tag_info", NULL },
1020                 { "global_tag_depth", NULL},
1021                 { "slewrate", NULL },
1022                 { "precomp", NULL },
1023                 { "amplitude", NULL },
1024                 { "slowcrc", &aic79xx_slowcrc },
1025         };
1026
1027         end = strchr(s, '\0');
1028
1029         /*
1030          * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1031          * will never be 0 in this case.
1032          */
1033         n = 0;
1034
1035         while ((p = strsep(&s, ",.")) != NULL) {
1036                 if (*p == '\0')
1037                         continue;
1038                 for (i = 0; i < ARRAY_SIZE(options); i++) {
1039
1040                         n = strlen(options[i].name);
1041                         if (strncmp(options[i].name, p, n) == 0)
1042                                 break;
1043                 }
1044                 if (i == ARRAY_SIZE(options))
1045                         continue;
1046
1047                 if (strncmp(p, "global_tag_depth", n) == 0) {
1048                         ahd_linux_setup_tag_info_global(p + n);
1049                 } else if (strncmp(p, "tag_info", n) == 0) {
1050                         s = ahd_parse_brace_option("tag_info", p + n, end,
1051                             2, ahd_linux_setup_tag_info, 0);
1052                 } else if (strncmp(p, "slewrate", n) == 0) {
1053                         s = ahd_parse_brace_option("slewrate",
1054                             p + n, end, 1, ahd_linux_setup_iocell_info,
1055                             AIC79XX_SLEWRATE_INDEX);
1056                 } else if (strncmp(p, "precomp", n) == 0) {
1057                         s = ahd_parse_brace_option("precomp",
1058                             p + n, end, 1, ahd_linux_setup_iocell_info,
1059                             AIC79XX_PRECOMP_INDEX);
1060                 } else if (strncmp(p, "amplitude", n) == 0) {
1061                         s = ahd_parse_brace_option("amplitude",
1062                             p + n, end, 1, ahd_linux_setup_iocell_info,
1063                             AIC79XX_AMPLITUDE_INDEX);
1064                 } else if (p[n] == ':') {
1065                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1066                 } else if (!strncmp(p, "verbose", n)) {
1067                         *(options[i].flag) = 1;
1068                 } else {
1069                         *(options[i].flag) ^= 0xFFFFFFFF;
1070                 }
1071         }
1072         return 1;
1073 }
1074
1075 __setup("aic79xx=", aic79xx_setup);
1076
1077 uint32_t aic79xx_verbose;
1078
1079 int
1080 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1081 {
1082         char    buf[80];
1083         struct  Scsi_Host *host;
1084         char    *new_name;
1085         u_long  s;
1086         int     retval;
1087
1088         template->name = ahd->description;
1089         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1090         if (host == NULL)
1091                 return (ENOMEM);
1092
1093         *((struct ahd_softc **)host->hostdata) = ahd;
1094         ahd->platform_data->host = host;
1095         host->can_queue = AHD_MAX_QUEUE;
1096         host->cmd_per_lun = 2;
1097         host->sg_tablesize = AHD_NSEG;
1098         host->this_id = ahd->our_id;
1099         host->irq = ahd->platform_data->irq;
1100         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1101         host->max_lun = AHD_NUM_LUNS;
1102         host->max_channel = 0;
1103         host->sg_tablesize = AHD_NSEG;
1104         ahd_lock(ahd, &s);
1105         ahd_set_unit(ahd, ahd_linux_unit++);
1106         ahd_unlock(ahd, &s);
1107         sprintf(buf, "scsi%d", host->host_no);
1108         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1109         if (new_name != NULL) {
1110                 strcpy(new_name, buf);
1111                 ahd_set_name(ahd, new_name);
1112         }
1113         host->unique_id = ahd->unit;
1114         ahd_linux_initialize_scsi_bus(ahd);
1115         ahd_intr_enable(ahd, TRUE);
1116
1117         host->transportt = ahd_linux_transport_template;
1118
1119         retval = scsi_add_host(host, &ahd->dev_softc->dev);
1120         if (retval) {
1121                 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1122                 scsi_host_put(host);
1123                 return retval;
1124         }
1125
1126         scsi_scan_host(host);
1127         return 0;
1128 }
1129
1130 /*
1131  * Place the SCSI bus into a known state by either resetting it,
1132  * or forcing transfer negotiations on the next command to any
1133  * target.
1134  */
1135 static void
1136 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1137 {
1138         u_int target_id;
1139         u_int numtarg;
1140         unsigned long s;
1141
1142         target_id = 0;
1143         numtarg = 0;
1144
1145         if (aic79xx_no_reset != 0)
1146                 ahd->flags &= ~AHD_RESET_BUS_A;
1147
1148         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1149                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1150         else
1151                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1152
1153         ahd_lock(ahd, &s);
1154
1155         /*
1156          * Force negotiation to async for all targets that
1157          * will not see an initial bus reset.
1158          */
1159         for (; target_id < numtarg; target_id++) {
1160                 struct ahd_devinfo devinfo;
1161                 struct ahd_initiator_tinfo *tinfo;
1162                 struct ahd_tmode_tstate *tstate;
1163
1164                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1165                                             target_id, &tstate);
1166                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1167                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1168                 ahd_update_neg_request(ahd, &devinfo, tstate,
1169                                        tinfo, AHD_NEG_ALWAYS);
1170         }
1171         ahd_unlock(ahd, &s);
1172         /* Give the bus some time to recover */
1173         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1174                 ahd_freeze_simq(ahd);
1175                 msleep(AIC79XX_RESET_DELAY);
1176                 ahd_release_simq(ahd);
1177         }
1178 }
1179
1180 int
1181 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1182 {
1183         ahd->platform_data =
1184             malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1185         if (ahd->platform_data == NULL)
1186                 return (ENOMEM);
1187         memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1188         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1189         ahd_lockinit(ahd);
1190         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1191         return (0);
1192 }
1193
1194 void
1195 ahd_platform_free(struct ahd_softc *ahd)
1196 {
1197         struct scsi_target *starget;
1198         int i;
1199
1200         if (ahd->platform_data != NULL) {
1201                 /* destroy all of the device and target objects */
1202                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1203                         starget = ahd->platform_data->starget[i];
1204                         if (starget != NULL) {
1205                                 ahd->platform_data->starget[i] = NULL;
1206                         }
1207                 }
1208
1209                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1210                         free_irq(ahd->platform_data->irq, ahd);
1211                 if (ahd->tags[0] == BUS_SPACE_PIO
1212                  && ahd->bshs[0].ioport != 0)
1213                         release_region(ahd->bshs[0].ioport, 256);
1214                 if (ahd->tags[1] == BUS_SPACE_PIO
1215                  && ahd->bshs[1].ioport != 0)
1216                         release_region(ahd->bshs[1].ioport, 256);
1217                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1218                  && ahd->bshs[0].maddr != NULL) {
1219                         iounmap(ahd->bshs[0].maddr);
1220                         release_mem_region(ahd->platform_data->mem_busaddr,
1221                                            0x1000);
1222                 }
1223                 if (ahd->platform_data->host)
1224                         scsi_host_put(ahd->platform_data->host);
1225
1226                 free(ahd->platform_data, M_DEVBUF);
1227         }
1228 }
1229
1230 void
1231 ahd_platform_init(struct ahd_softc *ahd)
1232 {
1233         /*
1234          * Lookup and commit any modified IO Cell options.
1235          */
1236         if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1237                 struct ahd_linux_iocell_opts *iocell_opts;
1238
1239                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1240                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1241                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1242                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1243                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1244                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1245                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1246         }
1247
1248 }
1249
1250 void
1251 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1252 {
1253         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1254                                 SCB_GET_CHANNEL(ahd, scb),
1255                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1256                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1257 }
1258
1259 void
1260 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1261                       struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1262 {
1263         struct ahd_linux_device *dev;
1264         int was_queuing;
1265         int now_queuing;
1266
1267         if (sdev == NULL)
1268                 return;
1269
1270         dev = scsi_transport_device_data(sdev);
1271
1272         if (dev == NULL)
1273                 return;
1274         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1275         switch (alg) {
1276         default:
1277         case AHD_QUEUE_NONE:
1278                 now_queuing = 0;
1279                 break;
1280         case AHD_QUEUE_BASIC:
1281                 now_queuing = AHD_DEV_Q_BASIC;
1282                 break;
1283         case AHD_QUEUE_TAGGED:
1284                 now_queuing = AHD_DEV_Q_TAGGED;
1285                 break;
1286         }
1287         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1288          && (was_queuing != now_queuing)
1289          && (dev->active != 0)) {
1290                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1291                 dev->qfrozen++;
1292         }
1293
1294         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1295         if (now_queuing) {
1296                 u_int usertags;
1297
1298                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1299                 if (!was_queuing) {
1300                         /*
1301                          * Start out agressively and allow our
1302                          * dynamic queue depth algorithm to take
1303                          * care of the rest.
1304                          */
1305                         dev->maxtags = usertags;
1306                         dev->openings = dev->maxtags - dev->active;
1307                 }
1308                 if (dev->maxtags == 0) {
1309                         /*
1310                          * Queueing is disabled by the user.
1311                          */
1312                         dev->openings = 1;
1313                 } else if (alg == AHD_QUEUE_TAGGED) {
1314                         dev->flags |= AHD_DEV_Q_TAGGED;
1315                         if (aic79xx_periodic_otag != 0)
1316                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1317                 } else
1318                         dev->flags |= AHD_DEV_Q_BASIC;
1319         } else {
1320                 /* We can only have one opening. */
1321                 dev->maxtags = 0;
1322                 dev->openings =  1 - dev->active;
1323         }
1324
1325         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1326         case AHD_DEV_Q_BASIC:
1327                 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1328                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1329                 break;
1330         case AHD_DEV_Q_TAGGED:
1331                 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1332                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1333                 break;
1334         default:
1335                 /*
1336                  * We allow the OS to queue 2 untagged transactions to
1337                  * us at any time even though we can only execute them
1338                  * serially on the controller/device.  This should
1339                  * remove some latency.
1340                  */
1341                 scsi_deactivate_tcq(sdev, 1);
1342                 break;
1343         }
1344 }
1345
1346 int
1347 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1348                         int lun, u_int tag, role_t role, uint32_t status)
1349 {
1350         return 0;
1351 }
1352
1353 static u_int
1354 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1355 {
1356         static int warned_user;
1357         u_int tags;
1358
1359         tags = 0;
1360         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1361                 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1362
1363                         if (warned_user == 0) {
1364                                 printf(KERN_WARNING
1365 "aic79xx: WARNING: Insufficient tag_info instances\n"
1366 "aic79xx: for installed controllers.  Using defaults\n"
1367 "aic79xx: Please update the aic79xx_tag_info array in\n"
1368 "aic79xx: the aic79xx_osm.c source file.\n");
1369                                 warned_user++;
1370                         }
1371                         tags = AHD_MAX_QUEUE;
1372                 } else {
1373                         adapter_tag_info_t *tag_info;
1374
1375                         tag_info = &aic79xx_tag_info[ahd->unit];
1376                         tags = tag_info->tag_commands[devinfo->target_offset];
1377                         if (tags > AHD_MAX_QUEUE)
1378                                 tags = AHD_MAX_QUEUE;
1379                 }
1380         }
1381         return (tags);
1382 }
1383
1384 /*
1385  * Determines the queue depth for a given device.
1386  */
1387 static void
1388 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1389 {
1390         struct  ahd_devinfo devinfo;
1391         u_int   tags;
1392         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1393
1394         ahd_compile_devinfo(&devinfo,
1395                             ahd->our_id,
1396                             sdev->sdev_target->id, sdev->lun,
1397                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1398                             ROLE_INITIATOR);
1399         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1400         if (tags != 0 && sdev->tagged_supported != 0) {
1401
1402                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1403                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1404                                devinfo.lun, AC_TRANSFER_NEG);
1405                 ahd_print_devinfo(ahd, &devinfo);
1406                 printf("Tagged Queuing enabled.  Depth %d\n", tags);
1407         } else {
1408                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1409                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1410                                devinfo.lun, AC_TRANSFER_NEG);
1411         }
1412 }
1413
1414 static int
1415 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1416                       struct scsi_cmnd *cmd)
1417 {
1418         struct   scb *scb;
1419         struct   hardware_scb *hscb;
1420         struct   ahd_initiator_tinfo *tinfo;
1421         struct   ahd_tmode_tstate *tstate;
1422         u_int    col_idx;
1423         uint16_t mask;
1424         unsigned long flags;
1425
1426         ahd_lock(ahd, &flags);
1427
1428         /*
1429          * Get an scb to use.
1430          */
1431         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1432                                     cmd->device->id, &tstate);
1433         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1434          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1435                 col_idx = AHD_NEVER_COL_IDX;
1436         } else {
1437                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1438                                             cmd->device->lun);
1439         }
1440         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1441                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1442                 ahd_unlock(ahd, &flags);
1443                 return SCSI_MLQUEUE_HOST_BUSY;
1444         }
1445
1446         scb->io_ctx = cmd;
1447         scb->platform_data->dev = dev;
1448         hscb = scb->hscb;
1449         cmd->host_scribble = (char *)scb;
1450
1451         /*
1452          * Fill out basics of the HSCB.
1453          */
1454         hscb->control = 0;
1455         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1456         hscb->lun = cmd->device->lun;
1457         scb->hscb->task_management = 0;
1458         mask = SCB_GET_TARGET_MASK(ahd, scb);
1459
1460         if ((ahd->user_discenable & mask) != 0)
1461                 hscb->control |= DISCENB;
1462
1463         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1464                 scb->flags |= SCB_PACKETIZED;
1465
1466         if ((tstate->auto_negotiate & mask) != 0) {
1467                 scb->flags |= SCB_AUTO_NEGOTIATE;
1468                 scb->hscb->control |= MK_MESSAGE;
1469         }
1470
1471         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1472                 int     msg_bytes;
1473                 uint8_t tag_msgs[2];
1474
1475                 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1476                 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1477                         hscb->control |= tag_msgs[0];
1478                         if (tag_msgs[0] == MSG_ORDERED_TASK)
1479                                 dev->commands_since_idle_or_otag = 0;
1480                 } else
1481                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1482                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1483                         hscb->control |= MSG_ORDERED_TASK;
1484                         dev->commands_since_idle_or_otag = 0;
1485                 } else {
1486                         hscb->control |= MSG_SIMPLE_TASK;
1487                 }
1488         }
1489
1490         hscb->cdb_len = cmd->cmd_len;
1491         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1492
1493         scb->platform_data->xfer_len = 0;
1494         ahd_set_residual(scb, 0);
1495         ahd_set_sense_residual(scb, 0);
1496         scb->sg_count = 0;
1497         if (cmd->use_sg != 0) {
1498                 void    *sg;
1499                 struct   scatterlist *cur_seg;
1500                 u_int    nseg;
1501                 int      dir;
1502
1503                 cur_seg = (struct scatterlist *)cmd->request_buffer;
1504                 dir = cmd->sc_data_direction;
1505                 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1506                                   cmd->use_sg, dir);
1507                 scb->platform_data->xfer_len = 0;
1508                 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1509                         dma_addr_t addr;
1510                         bus_size_t len;
1511
1512                         addr = sg_dma_address(cur_seg);
1513                         len = sg_dma_len(cur_seg);
1514                         scb->platform_data->xfer_len += len;
1515                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1516                                           /*last*/nseg == 1);
1517                 }
1518         } else if (cmd->request_bufflen != 0) {
1519                 void *sg;
1520                 dma_addr_t addr;
1521                 int dir;
1522
1523                 sg = scb->sg_list;
1524                 dir = cmd->sc_data_direction;
1525                 addr = pci_map_single(ahd->dev_softc,
1526                                       cmd->request_buffer,
1527                                       cmd->request_bufflen, dir);
1528                 scb->platform_data->xfer_len = cmd->request_bufflen;
1529                 scb->platform_data->buf_busaddr = addr;
1530                 sg = ahd_sg_setup(ahd, scb, sg, addr,
1531                                   cmd->request_bufflen, /*last*/TRUE);
1532         }
1533
1534         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1535         dev->openings--;
1536         dev->active++;
1537         dev->commands_issued++;
1538
1539         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1540                 dev->commands_since_idle_or_otag++;
1541         scb->flags |= SCB_ACTIVE;
1542         ahd_queue_scb(ahd, scb);
1543
1544         ahd_unlock(ahd, &flags);
1545
1546         return 0;
1547 }
1548
1549 /*
1550  * SCSI controller interrupt handler.
1551  */
1552 irqreturn_t
1553 ahd_linux_isr(int irq, void *dev_id)
1554 {
1555         struct  ahd_softc *ahd;
1556         u_long  flags;
1557         int     ours;
1558
1559         ahd = (struct ahd_softc *) dev_id;
1560         ahd_lock(ahd, &flags);
1561         ours = ahd_intr(ahd);
1562         ahd_unlock(ahd, &flags);
1563         return IRQ_RETVAL(ours);
1564 }
1565
1566 void
1567 ahd_send_async(struct ahd_softc *ahd, char channel,
1568                u_int target, u_int lun, ac_code code)
1569 {
1570         switch (code) {
1571         case AC_TRANSFER_NEG:
1572         {
1573                 char    buf[80];
1574                 struct  scsi_target *starget;
1575                 struct  info_str info;
1576                 struct  ahd_initiator_tinfo *tinfo;
1577                 struct  ahd_tmode_tstate *tstate;
1578                 unsigned int target_ppr_options;
1579
1580                 BUG_ON(target == CAM_TARGET_WILDCARD);
1581
1582                 info.buffer = buf;
1583                 info.length = sizeof(buf);
1584                 info.offset = 0;
1585                 info.pos = 0;
1586                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1587                                             target, &tstate);
1588
1589                 /*
1590                  * Don't bother reporting results while
1591                  * negotiations are still pending.
1592                  */
1593                 if (tinfo->curr.period != tinfo->goal.period
1594                  || tinfo->curr.width != tinfo->goal.width
1595                  || tinfo->curr.offset != tinfo->goal.offset
1596                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1597                         if (bootverbose == 0)
1598                                 break;
1599
1600                 /*
1601                  * Don't bother reporting results that
1602                  * are identical to those last reported.
1603                  */
1604                 starget = ahd->platform_data->starget[target];
1605                 if (starget == NULL)
1606                         break;
1607
1608                 target_ppr_options =
1609                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1610                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1611                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1612                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1613                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1614                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1615                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1616                         + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1617
1618                 if (tinfo->curr.period == spi_period(starget)
1619                     && tinfo->curr.width == spi_width(starget)
1620                     && tinfo->curr.offset == spi_offset(starget)
1621                  && tinfo->curr.ppr_options == target_ppr_options)
1622                         if (bootverbose == 0)
1623                                 break;
1624
1625                 spi_period(starget) = tinfo->curr.period;
1626                 spi_width(starget) = tinfo->curr.width;
1627                 spi_offset(starget) = tinfo->curr.offset;
1628                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1629                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1630                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1631                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1632                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1633                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1634                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1635                 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1636                 spi_display_xfer_agreement(starget);
1637                 break;
1638         }
1639         case AC_SENT_BDR:
1640         {
1641                 WARN_ON(lun != CAM_LUN_WILDCARD);
1642                 scsi_report_device_reset(ahd->platform_data->host,
1643                                          channel - 'A', target);
1644                 break;
1645         }
1646         case AC_BUS_RESET:
1647                 if (ahd->platform_data->host != NULL) {
1648                         scsi_report_bus_reset(ahd->platform_data->host,
1649                                               channel - 'A');
1650                 }
1651                 break;
1652         default:
1653                 panic("ahd_send_async: Unexpected async event");
1654         }
1655 }
1656
1657 /*
1658  * Calls the higher level scsi done function and frees the scb.
1659  */
1660 void
1661 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1662 {
1663         struct scsi_cmnd *cmd;
1664         struct    ahd_linux_device *dev;
1665
1666         if ((scb->flags & SCB_ACTIVE) == 0) {
1667                 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1668                 ahd_dump_card_state(ahd);
1669                 panic("Stopping for safety");
1670         }
1671         LIST_REMOVE(scb, pending_links);
1672         cmd = scb->io_ctx;
1673         dev = scb->platform_data->dev;
1674         dev->active--;
1675         dev->openings++;
1676         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1677                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1678                 dev->qfrozen--;
1679         }
1680         ahd_linux_unmap_scb(ahd, scb);
1681
1682         /*
1683          * Guard against stale sense data.
1684          * The Linux mid-layer assumes that sense
1685          * was retrieved anytime the first byte of
1686          * the sense buffer looks "sane".
1687          */
1688         cmd->sense_buffer[0] = 0;
1689         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1690                 uint32_t amount_xferred;
1691
1692                 amount_xferred =
1693                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1694                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1695 #ifdef AHD_DEBUG
1696                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1697                                 ahd_print_path(ahd, scb);
1698                                 printf("Set CAM_UNCOR_PARITY\n");
1699                         }
1700 #endif
1701                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1702 #ifdef AHD_REPORT_UNDERFLOWS
1703                 /*
1704                  * This code is disabled by default as some
1705                  * clients of the SCSI system do not properly
1706                  * initialize the underflow parameter.  This
1707                  * results in spurious termination of commands
1708                  * that complete as expected (e.g. underflow is
1709                  * allowed as command can return variable amounts
1710                  * of data.
1711                  */
1712                 } else if (amount_xferred < scb->io_ctx->underflow) {
1713                         u_int i;
1714
1715                         ahd_print_path(ahd, scb);
1716                         printf("CDB:");
1717                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1718                                 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1719                         printf("\n");
1720                         ahd_print_path(ahd, scb);
1721                         printf("Saw underflow (%ld of %ld bytes). "
1722                                "Treated as error\n",
1723                                 ahd_get_residual(scb),
1724                                 ahd_get_transfer_length(scb));
1725                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1726 #endif
1727                 } else {
1728                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1729                 }
1730         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1731                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1732         }
1733
1734         if (dev->openings == 1
1735          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1736          && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1737                 dev->tag_success_count++;
1738         /*
1739          * Some devices deal with temporary internal resource
1740          * shortages by returning queue full.  When the queue
1741          * full occurrs, we throttle back.  Slowly try to get
1742          * back to our previous queue depth.
1743          */
1744         if ((dev->openings + dev->active) < dev->maxtags
1745          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1746                 dev->tag_success_count = 0;
1747                 dev->openings++;
1748         }
1749
1750         if (dev->active == 0)
1751                 dev->commands_since_idle_or_otag = 0;
1752
1753         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1754                 printf("Recovery SCB completes\n");
1755                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1756                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1757                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1758
1759                 if (ahd->platform_data->eh_done)
1760                         complete(ahd->platform_data->eh_done);
1761         }
1762
1763         ahd_free_scb(ahd, scb);
1764         ahd_linux_queue_cmd_complete(ahd, cmd);
1765 }
1766
1767 static void
1768 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1769                              struct scsi_device *sdev, struct scb *scb)
1770 {
1771         struct  ahd_devinfo devinfo;
1772         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1773
1774         ahd_compile_devinfo(&devinfo,
1775                             ahd->our_id,
1776                             sdev->sdev_target->id, sdev->lun,
1777                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1778                             ROLE_INITIATOR);
1779
1780         /*
1781          * We don't currently trust the mid-layer to
1782          * properly deal with queue full or busy.  So,
1783          * when one occurs, we tell the mid-layer to
1784          * unconditionally requeue the command to us
1785          * so that we can retry it ourselves.  We also
1786          * implement our own throttling mechanism so
1787          * we don't clobber the device with too many
1788          * commands.
1789          */
1790         switch (ahd_get_scsi_status(scb)) {
1791         default:
1792                 break;
1793         case SCSI_STATUS_CHECK_COND:
1794         case SCSI_STATUS_CMD_TERMINATED:
1795         {
1796                 struct scsi_cmnd *cmd;
1797
1798                 /*
1799                  * Copy sense information to the OS's cmd
1800                  * structure if it is available.
1801                  */
1802                 cmd = scb->io_ctx;
1803                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1804                         struct scsi_status_iu_header *siu;
1805                         u_int sense_size;
1806                         u_int sense_offset;
1807
1808                         if (scb->flags & SCB_SENSE) {
1809                                 sense_size = min(sizeof(struct scsi_sense_data)
1810                                                - ahd_get_sense_residual(scb),
1811                                                  (u_long)sizeof(cmd->sense_buffer));
1812                                 sense_offset = 0;
1813                         } else {
1814                                 /*
1815                                  * Copy only the sense data into the provided
1816                                  * buffer.
1817                                  */
1818                                 siu = (struct scsi_status_iu_header *)
1819                                     scb->sense_data;
1820                                 sense_size = min_t(size_t,
1821                                                 scsi_4btoul(siu->sense_length),
1822                                                 sizeof(cmd->sense_buffer));
1823                                 sense_offset = SIU_SENSE_OFFSET(siu);
1824                         }
1825
1826                         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1827                         memcpy(cmd->sense_buffer,
1828                                ahd_get_sense_buf(ahd, scb)
1829                                + sense_offset, sense_size);
1830                         cmd->result |= (DRIVER_SENSE << 24);
1831
1832 #ifdef AHD_DEBUG
1833                         if (ahd_debug & AHD_SHOW_SENSE) {
1834                                 int i;
1835
1836                                 printf("Copied %d bytes of sense data at %d:",
1837                                        sense_size, sense_offset);
1838                                 for (i = 0; i < sense_size; i++) {
1839                                         if ((i & 0xF) == 0)
1840                                                 printf("\n");
1841                                         printf("0x%x ", cmd->sense_buffer[i]);
1842                                 }
1843                                 printf("\n");
1844                         }
1845 #endif
1846                 }
1847                 break;
1848         }
1849         case SCSI_STATUS_QUEUE_FULL:
1850                 /*
1851                  * By the time the core driver has returned this
1852                  * command, all other commands that were queued
1853                  * to us but not the device have been returned.
1854                  * This ensures that dev->active is equal to
1855                  * the number of commands actually queued to
1856                  * the device.
1857                  */
1858                 dev->tag_success_count = 0;
1859                 if (dev->active != 0) {
1860                         /*
1861                          * Drop our opening count to the number
1862                          * of commands currently outstanding.
1863                          */
1864                         dev->openings = 0;
1865 #ifdef AHD_DEBUG
1866                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1867                                 ahd_print_path(ahd, scb);
1868                                 printf("Dropping tag count to %d\n",
1869                                        dev->active);
1870                         }
1871 #endif
1872                         if (dev->active == dev->tags_on_last_queuefull) {
1873
1874                                 dev->last_queuefull_same_count++;
1875                                 /*
1876                                  * If we repeatedly see a queue full
1877                                  * at the same queue depth, this
1878                                  * device has a fixed number of tag
1879                                  * slots.  Lock in this tag depth
1880                                  * so we stop seeing queue fulls from
1881                                  * this device.
1882                                  */
1883                                 if (dev->last_queuefull_same_count
1884                                  == AHD_LOCK_TAGS_COUNT) {
1885                                         dev->maxtags = dev->active;
1886                                         ahd_print_path(ahd, scb);
1887                                         printf("Locking max tag count at %d\n",
1888                                                dev->active);
1889                                 }
1890                         } else {
1891                                 dev->tags_on_last_queuefull = dev->active;
1892                                 dev->last_queuefull_same_count = 0;
1893                         }
1894                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1895                         ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1896                         ahd_platform_set_tags(ahd, sdev, &devinfo,
1897                                      (dev->flags & AHD_DEV_Q_BASIC)
1898                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1899                         break;
1900                 }
1901                 /*
1902                  * Drop down to a single opening, and treat this
1903                  * as if the target returned BUSY SCSI status.
1904                  */
1905                 dev->openings = 1;
1906                 ahd_platform_set_tags(ahd, sdev, &devinfo,
1907                              (dev->flags & AHD_DEV_Q_BASIC)
1908                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1909                 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1910         }
1911 }
1912
1913 static void
1914 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1915 {
1916         int status;
1917         int new_status = DID_OK;
1918         int do_fallback = 0;
1919         int scsi_status;
1920
1921         /*
1922          * Map CAM error codes into Linux Error codes.  We
1923          * avoid the conversion so that the DV code has the
1924          * full error information available when making
1925          * state change decisions.
1926          */
1927
1928         status = ahd_cmd_get_transaction_status(cmd);
1929         switch (status) {
1930         case CAM_REQ_INPROG:
1931         case CAM_REQ_CMP:
1932                 new_status = DID_OK;
1933                 break;
1934         case CAM_AUTOSENSE_FAIL:
1935                 new_status = DID_ERROR;
1936                 /* Fallthrough */
1937         case CAM_SCSI_STATUS_ERROR:
1938                 scsi_status = ahd_cmd_get_scsi_status(cmd);
1939
1940                 switch(scsi_status) {
1941                 case SCSI_STATUS_CMD_TERMINATED:
1942                 case SCSI_STATUS_CHECK_COND:
1943                         if ((cmd->result >> 24) != DRIVER_SENSE) {
1944                                 do_fallback = 1;
1945                         } else {
1946                                 struct scsi_sense_data *sense;
1947
1948                                 sense = (struct scsi_sense_data *)
1949                                         &cmd->sense_buffer;
1950                                 if (sense->extra_len >= 5 &&
1951                                     (sense->add_sense_code == 0x47
1952                                      || sense->add_sense_code == 0x48))
1953                                         do_fallback = 1;
1954                         }
1955                         break;
1956                 default:
1957                         break;
1958                 }
1959                 break;
1960         case CAM_REQ_ABORTED:
1961                 new_status = DID_ABORT;
1962                 break;
1963         case CAM_BUSY:
1964                 new_status = DID_BUS_BUSY;
1965                 break;
1966         case CAM_REQ_INVALID:
1967         case CAM_PATH_INVALID:
1968                 new_status = DID_BAD_TARGET;
1969                 break;
1970         case CAM_SEL_TIMEOUT:
1971                 new_status = DID_NO_CONNECT;
1972                 break;
1973         case CAM_SCSI_BUS_RESET:
1974         case CAM_BDR_SENT:
1975                 new_status = DID_RESET;
1976                 break;
1977         case CAM_UNCOR_PARITY:
1978                 new_status = DID_PARITY;
1979                 do_fallback = 1;
1980                 break;
1981         case CAM_CMD_TIMEOUT:
1982                 new_status = DID_TIME_OUT;
1983                 do_fallback = 1;
1984                 break;
1985         case CAM_REQ_CMP_ERR:
1986         case CAM_UNEXP_BUSFREE:
1987         case CAM_DATA_RUN_ERR:
1988                 new_status = DID_ERROR;
1989                 do_fallback = 1;
1990                 break;
1991         case CAM_UA_ABORT:
1992         case CAM_NO_HBA:
1993         case CAM_SEQUENCE_FAIL:
1994         case CAM_CCB_LEN_ERR:
1995         case CAM_PROVIDE_FAIL:
1996         case CAM_REQ_TERMIO:
1997         case CAM_UNREC_HBA_ERROR:
1998         case CAM_REQ_TOO_BIG:
1999                 new_status = DID_ERROR;
2000                 break;
2001         case CAM_REQUEUE_REQ:
2002                 new_status = DID_REQUEUE;
2003                 break;
2004         default:
2005                 /* We should never get here */
2006                 new_status = DID_ERROR;
2007                 break;
2008         }
2009
2010         if (do_fallback) {
2011                 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2012                        ahd_name(ahd), status, cmd->device->channel,
2013                        cmd->device->id, cmd->device->lun);
2014         }
2015
2016         ahd_cmd_set_transaction_status(cmd, new_status);
2017
2018         cmd->scsi_done(cmd);
2019 }
2020
2021 static void
2022 ahd_freeze_simq(struct ahd_softc *ahd)
2023 {
2024         scsi_block_requests(ahd->platform_data->host);
2025 }
2026
2027 static void
2028 ahd_release_simq(struct ahd_softc *ahd)
2029 {
2030         scsi_unblock_requests(ahd->platform_data->host);
2031 }
2032
2033 static int
2034 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2035 {
2036         struct ahd_softc *ahd;
2037         struct ahd_linux_device *dev;
2038         struct scb *pending_scb;
2039         u_int  saved_scbptr;
2040         u_int  active_scbptr;
2041         u_int  last_phase;
2042         u_int  saved_scsiid;
2043         u_int  cdb_byte;
2044         int    retval;
2045         int    was_paused;
2046         int    paused;
2047         int    wait;
2048         int    disconnected;
2049         ahd_mode_state saved_modes;
2050         unsigned long flags;
2051
2052         pending_scb = NULL;
2053         paused = FALSE;
2054         wait = FALSE;
2055         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2056
2057         scmd_printk(KERN_INFO, cmd,
2058                     "Attempting to queue an ABORT message:");
2059
2060         printf("CDB:");
2061         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2062                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2063         printf("\n");
2064
2065         ahd_lock(ahd, &flags);
2066
2067         /*
2068          * First determine if we currently own this command.
2069          * Start by searching the device queue.  If not found
2070          * there, check the pending_scb list.  If not found
2071          * at all, and the system wanted us to just abort the
2072          * command, return success.
2073          */
2074         dev = scsi_transport_device_data(cmd->device);
2075
2076         if (dev == NULL) {
2077                 /*
2078                  * No target device for this command exists,
2079                  * so we must not still own the command.
2080                  */
2081                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2082                 retval = SUCCESS;
2083                 goto no_cmd;
2084         }
2085
2086         /*
2087          * See if we can find a matching cmd in the pending list.
2088          */
2089         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2090                 if (pending_scb->io_ctx == cmd)
2091                         break;
2092         }
2093
2094         if (pending_scb == NULL) {
2095                 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2096                 goto no_cmd;
2097         }
2098
2099         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2100                 /*
2101                  * We can't queue two recovery actions using the same SCB
2102                  */
2103                 retval = FAILED;
2104                 goto  done;
2105         }
2106
2107         /*
2108          * Ensure that the card doesn't do anything
2109          * behind our back.  Also make sure that we
2110          * didn't "just" miss an interrupt that would
2111          * affect this cmd.
2112          */
2113         was_paused = ahd_is_paused(ahd);
2114         ahd_pause_and_flushwork(ahd);
2115         paused = TRUE;
2116
2117         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2118                 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2119                 goto no_cmd;
2120         }
2121
2122         printf("%s: At time of recovery, card was %spaused\n",
2123                ahd_name(ahd), was_paused ? "" : "not ");
2124         ahd_dump_card_state(ahd);
2125
2126         disconnected = TRUE;
2127         if (ahd_search_qinfifo(ahd, cmd->device->id,
2128                                cmd->device->channel + 'A',
2129                                cmd->device->lun,
2130                                pending_scb->hscb->tag,
2131                                ROLE_INITIATOR, CAM_REQ_ABORTED,
2132                                SEARCH_COMPLETE) > 0) {
2133                 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2134                        ahd_name(ahd), cmd->device->channel,
2135                        cmd->device->id, cmd->device->lun);
2136                 retval = SUCCESS;
2137                 goto done;
2138         }
2139
2140         saved_modes = ahd_save_modes(ahd);
2141         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2142         last_phase = ahd_inb(ahd, LASTPHASE);
2143         saved_scbptr = ahd_get_scbptr(ahd);
2144         active_scbptr = saved_scbptr;
2145         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2146                 struct scb *bus_scb;
2147
2148                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2149                 if (bus_scb == pending_scb)
2150                         disconnected = FALSE;
2151         }
2152
2153         /*
2154          * At this point, pending_scb is the scb associated with the
2155          * passed in command.  That command is currently active on the
2156          * bus or is in the disconnected state.
2157          */
2158         saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2159         if (last_phase != P_BUSFREE
2160             && SCB_GET_TAG(pending_scb) == active_scbptr) {
2161
2162                 /*
2163                  * We're active on the bus, so assert ATN
2164                  * and hope that the target responds.
2165                  */
2166                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2167                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2168                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2169                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2170                 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2171                 wait = TRUE;
2172         } else if (disconnected) {
2173
2174                 /*
2175                  * Actually re-queue this SCB in an attempt
2176                  * to select the device before it reconnects.
2177                  */
2178                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2179                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2180                 pending_scb->hscb->cdb_len = 0;
2181                 pending_scb->hscb->task_attribute = 0;
2182                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2183
2184                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2185                         /*
2186                          * Mark the SCB has having an outstanding
2187                          * task management function.  Should the command
2188                          * complete normally before the task management
2189                          * function can be sent, the host will be notified
2190                          * to abort our requeued SCB.
2191                          */
2192                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2193                                  pending_scb->hscb->task_management);
2194                 } else {
2195                         /*
2196                          * If non-packetized, set the MK_MESSAGE control
2197                          * bit indicating that we desire to send a message.
2198                          * We also set the disconnected flag since there is
2199                          * no guarantee that our SCB control byte matches
2200                          * the version on the card.  We don't want the
2201                          * sequencer to abort the command thinking an
2202                          * unsolicited reselection occurred.
2203                          */
2204                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2205
2206                         /*
2207                          * The sequencer will never re-reference the
2208                          * in-core SCB.  To make sure we are notified
2209                          * during reslection, set the MK_MESSAGE flag in
2210                          * the card's copy of the SCB.
2211                          */
2212                         ahd_outb(ahd, SCB_CONTROL,
2213                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2214                 }
2215
2216                 /*
2217                  * Clear out any entries in the QINFIFO first
2218                  * so we are the next SCB for this target
2219                  * to run.
2220                  */
2221                 ahd_search_qinfifo(ahd, cmd->device->id,
2222                                    cmd->device->channel + 'A', cmd->device->lun,
2223                                    SCB_LIST_NULL, ROLE_INITIATOR,
2224                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2225                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2226                 ahd_set_scbptr(ahd, saved_scbptr);
2227                 ahd_print_path(ahd, pending_scb);
2228                 printf("Device is disconnected, re-queuing SCB\n");
2229                 wait = TRUE;
2230         } else {
2231                 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2232                 retval = FAILED;
2233                 goto done;
2234         }
2235
2236 no_cmd:
2237         /*
2238          * Our assumption is that if we don't have the command, no
2239          * recovery action was required, so we return success.  Again,
2240          * the semantics of the mid-layer recovery engine are not
2241          * well defined, so this may change in time.
2242          */
2243         retval = SUCCESS;
2244 done:
2245         if (paused)
2246                 ahd_unpause(ahd);
2247         if (wait) {
2248                 DECLARE_COMPLETION_ONSTACK(done);
2249
2250                 ahd->platform_data->eh_done = &done;
2251                 ahd_unlock(ahd, &flags);
2252
2253                 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2254                 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2255                         ahd_lock(ahd, &flags);
2256                         ahd->platform_data->eh_done = NULL;
2257                         ahd_unlock(ahd, &flags);
2258                         printf("%s: Timer Expired (active %d)\n",
2259                                ahd_name(ahd), dev->active);
2260                         retval = FAILED;
2261                 }
2262                 printf("Recovery code awake\n");
2263         } else
2264                 ahd_unlock(ahd, &flags);
2265
2266         if (retval != SUCCESS)
2267                 printf("%s: Command abort returning 0x%x\n",
2268                        ahd_name(ahd), retval);
2269
2270         return retval;
2271 }
2272
2273 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2274 {
2275         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2276         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2277         struct ahd_devinfo devinfo;
2278         unsigned long flags;
2279
2280         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2281                             starget->channel + 'A', ROLE_INITIATOR);
2282         ahd_lock(ahd, &flags);
2283         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2284         ahd_unlock(ahd, &flags);
2285 }
2286
2287 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2288 {
2289         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2290         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2291         struct ahd_tmode_tstate *tstate;
2292         struct ahd_initiator_tinfo *tinfo
2293                 = ahd_fetch_transinfo(ahd,
2294                                       starget->channel + 'A',
2295                                       shost->this_id, starget->id, &tstate);
2296         struct ahd_devinfo devinfo;
2297         unsigned int ppr_options = tinfo->goal.ppr_options;
2298         unsigned int dt;
2299         unsigned long flags;
2300         unsigned long offset = tinfo->goal.offset;
2301
2302 #ifdef AHD_DEBUG
2303         if ((ahd_debug & AHD_SHOW_DV) != 0)
2304                 printf("%s: set period to %d\n", ahd_name(ahd), period);
2305 #endif
2306         if (offset == 0)
2307                 offset = MAX_OFFSET;
2308
2309         if (period < 8)
2310                 period = 8;
2311         if (period < 10) {
2312                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2313                 if (period == 8)
2314                         ppr_options |= MSG_EXT_PPR_IU_REQ;
2315         }
2316
2317         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2318
2319         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2320                             starget->channel + 'A', ROLE_INITIATOR);
2321
2322         /* all PPR requests apart from QAS require wide transfers */
2323         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2324                 if (spi_width(starget) == 0)
2325                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2326         }
2327
2328         ahd_find_syncrate(ahd, &period, &ppr_options,
2329                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2330
2331         ahd_lock(ahd, &flags);
2332         ahd_set_syncrate(ahd, &devinfo, period, offset,
2333                          ppr_options, AHD_TRANS_GOAL, FALSE);
2334         ahd_unlock(ahd, &flags);
2335 }
2336
2337 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2338 {
2339         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2340         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2341         struct ahd_tmode_tstate *tstate;
2342         struct ahd_initiator_tinfo *tinfo
2343                 = ahd_fetch_transinfo(ahd,
2344                                       starget->channel + 'A',
2345                                       shost->this_id, starget->id, &tstate);
2346         struct ahd_devinfo devinfo;
2347         unsigned int ppr_options = 0;
2348         unsigned int period = 0;
2349         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2350         unsigned long flags;
2351
2352 #ifdef AHD_DEBUG
2353         if ((ahd_debug & AHD_SHOW_DV) != 0)
2354                 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2355 #endif
2356
2357         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2358                             starget->channel + 'A', ROLE_INITIATOR);
2359         if (offset != 0) {
2360                 period = tinfo->goal.period;
2361                 ppr_options = tinfo->goal.ppr_options;
2362                 ahd_find_syncrate(ahd, &period, &ppr_options,
2363                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2364         }
2365
2366         ahd_lock(ahd, &flags);
2367         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2368                          AHD_TRANS_GOAL, FALSE);
2369         ahd_unlock(ahd, &flags);
2370 }
2371
2372 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2373 {
2374         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2375         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2376         struct ahd_tmode_tstate *tstate;
2377         struct ahd_initiator_tinfo *tinfo
2378                 = ahd_fetch_transinfo(ahd,
2379                                       starget->channel + 'A',
2380                                       shost->this_id, starget->id, &tstate);
2381         struct ahd_devinfo devinfo;
2382         unsigned int ppr_options = tinfo->goal.ppr_options
2383                 & ~MSG_EXT_PPR_DT_REQ;
2384         unsigned int period = tinfo->goal.period;
2385         unsigned int width = tinfo->goal.width;
2386         unsigned long flags;
2387
2388 #ifdef AHD_DEBUG
2389         if ((ahd_debug & AHD_SHOW_DV) != 0)
2390                 printf("%s: %s DT\n", ahd_name(ahd),
2391                        dt ? "enabling" : "disabling");
2392 #endif
2393         if (dt) {
2394                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2395                 if (!width)
2396                         ahd_linux_set_width(starget, 1);
2397         } else {
2398                 if (period <= 9)
2399                         period = 10; /* If resetting DT, period must be >= 25ns */
2400                 /* IU is invalid without DT set */
2401                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2402         }
2403         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2404                             starget->channel + 'A', ROLE_INITIATOR);
2405         ahd_find_syncrate(ahd, &period, &ppr_options,
2406                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2407
2408         ahd_lock(ahd, &flags);
2409         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2410                          ppr_options, AHD_TRANS_GOAL, FALSE);
2411         ahd_unlock(ahd, &flags);
2412 }
2413
2414 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2415 {
2416         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2417         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2418         struct ahd_tmode_tstate *tstate;
2419         struct ahd_initiator_tinfo *tinfo
2420                 = ahd_fetch_transinfo(ahd,
2421                                       starget->channel + 'A',
2422                                       shost->this_id, starget->id, &tstate);
2423         struct ahd_devinfo devinfo;
2424         unsigned int ppr_options = tinfo->goal.ppr_options
2425                 & ~MSG_EXT_PPR_QAS_REQ;
2426         unsigned int period = tinfo->goal.period;
2427         unsigned int dt;
2428         unsigned long flags;
2429
2430 #ifdef AHD_DEBUG
2431         if ((ahd_debug & AHD_SHOW_DV) != 0)
2432                 printf("%s: %s QAS\n", ahd_name(ahd),
2433                        qas ? "enabling" : "disabling");
2434 #endif
2435
2436         if (qas) {
2437                 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2438         }
2439
2440         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2441
2442         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2443                             starget->channel + 'A', ROLE_INITIATOR);
2444         ahd_find_syncrate(ahd, &period, &ppr_options,
2445                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2446
2447         ahd_lock(ahd, &flags);
2448         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2449                          ppr_options, AHD_TRANS_GOAL, FALSE);
2450         ahd_unlock(ahd, &flags);
2451 }
2452
2453 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2454 {
2455         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2456         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2457         struct ahd_tmode_tstate *tstate;
2458         struct ahd_initiator_tinfo *tinfo
2459                 = ahd_fetch_transinfo(ahd,
2460                                       starget->channel + 'A',
2461                                       shost->this_id, starget->id, &tstate);
2462         struct ahd_devinfo devinfo;
2463         unsigned int ppr_options = tinfo->goal.ppr_options
2464                 & ~MSG_EXT_PPR_IU_REQ;
2465         unsigned int period = tinfo->goal.period;
2466         unsigned int dt;
2467         unsigned long flags;
2468
2469 #ifdef AHD_DEBUG
2470         if ((ahd_debug & AHD_SHOW_DV) != 0)
2471                 printf("%s: %s IU\n", ahd_name(ahd),
2472                        iu ? "enabling" : "disabling");
2473 #endif
2474
2475         if (iu) {
2476                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2477                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2478         }
2479
2480         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2481
2482         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2483                             starget->channel + 'A', ROLE_INITIATOR);
2484         ahd_find_syncrate(ahd, &period, &ppr_options,
2485                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2486
2487         ahd_lock(ahd, &flags);
2488         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2489                          ppr_options, AHD_TRANS_GOAL, FALSE);
2490         ahd_unlock(ahd, &flags);
2491 }
2492
2493 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2494 {
2495         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2496         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2497         struct ahd_tmode_tstate *tstate;
2498         struct ahd_initiator_tinfo *tinfo
2499                 = ahd_fetch_transinfo(ahd,
2500                                       starget->channel + 'A',
2501                                       shost->this_id, starget->id, &tstate);
2502         struct ahd_devinfo devinfo;
2503         unsigned int ppr_options = tinfo->goal.ppr_options
2504                 & ~MSG_EXT_PPR_RD_STRM;
2505         unsigned int period = tinfo->goal.period;
2506         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2507         unsigned long flags;
2508
2509 #ifdef AHD_DEBUG
2510         if ((ahd_debug & AHD_SHOW_DV) != 0)
2511                 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2512                        rdstrm  ? "enabling" : "disabling");
2513 #endif
2514
2515         if (rdstrm)
2516                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2517
2518         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2519                             starget->channel + 'A', ROLE_INITIATOR);
2520         ahd_find_syncrate(ahd, &period, &ppr_options,
2521                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2522
2523         ahd_lock(ahd, &flags);
2524         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2525                          ppr_options, AHD_TRANS_GOAL, FALSE);
2526         ahd_unlock(ahd, &flags);
2527 }
2528
2529 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2530 {
2531         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2532         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2533         struct ahd_tmode_tstate *tstate;
2534         struct ahd_initiator_tinfo *tinfo
2535                 = ahd_fetch_transinfo(ahd,
2536                                       starget->channel + 'A',
2537                                       shost->this_id, starget->id, &tstate);
2538         struct ahd_devinfo devinfo;
2539         unsigned int ppr_options = tinfo->goal.ppr_options
2540                 & ~MSG_EXT_PPR_WR_FLOW;
2541         unsigned int period = tinfo->goal.period;
2542         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2543         unsigned long flags;
2544
2545 #ifdef AHD_DEBUG
2546         if ((ahd_debug & AHD_SHOW_DV) != 0)
2547                 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2548                        wrflow ? "enabling" : "disabling");
2549 #endif
2550
2551         if (wrflow)
2552                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2553
2554         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2555                             starget->channel + 'A', ROLE_INITIATOR);
2556         ahd_find_syncrate(ahd, &period, &ppr_options,
2557                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2558
2559         ahd_lock(ahd, &flags);
2560         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2561                          ppr_options, AHD_TRANS_GOAL, FALSE);
2562         ahd_unlock(ahd, &flags);
2563 }
2564
2565 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2566 {
2567         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2568         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2569         struct ahd_tmode_tstate *tstate;
2570         struct ahd_initiator_tinfo *tinfo
2571                 = ahd_fetch_transinfo(ahd,
2572                                       starget->channel + 'A',
2573                                       shost->this_id, starget->id, &tstate);
2574         struct ahd_devinfo devinfo;
2575         unsigned int ppr_options = tinfo->goal.ppr_options
2576                 & ~MSG_EXT_PPR_RTI;
2577         unsigned int period = tinfo->goal.period;
2578         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2579         unsigned long flags;
2580
2581         if ((ahd->features & AHD_RTI) == 0) {
2582 #ifdef AHD_DEBUG
2583                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2584                         printf("%s: RTI not available\n", ahd_name(ahd));
2585 #endif
2586                 return;
2587         }
2588
2589 #ifdef AHD_DEBUG
2590         if ((ahd_debug & AHD_SHOW_DV) != 0)
2591                 printf("%s: %s RTI\n", ahd_name(ahd),
2592                        rti ? "enabling" : "disabling");
2593 #endif
2594
2595         if (rti)
2596                 ppr_options |= MSG_EXT_PPR_RTI;
2597
2598         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2599                             starget->channel + 'A', ROLE_INITIATOR);
2600         ahd_find_syncrate(ahd, &period, &ppr_options,
2601                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2602
2603         ahd_lock(ahd, &flags);
2604         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2605                          ppr_options, AHD_TRANS_GOAL, FALSE);
2606         ahd_unlock(ahd, &flags);
2607 }
2608
2609 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2610 {
2611         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2612         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2613         struct ahd_tmode_tstate *tstate;
2614         struct ahd_initiator_tinfo *tinfo
2615                 = ahd_fetch_transinfo(ahd,
2616                                       starget->channel + 'A',
2617                                       shost->this_id, starget->id, &tstate);
2618         struct ahd_devinfo devinfo;
2619         unsigned int ppr_options = tinfo->goal.ppr_options
2620                 & ~MSG_EXT_PPR_PCOMP_EN;
2621         unsigned int period = tinfo->goal.period;
2622         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2623         unsigned long flags;
2624
2625 #ifdef AHD_DEBUG
2626         if ((ahd_debug & AHD_SHOW_DV) != 0)
2627                 printf("%s: %s Precompensation\n", ahd_name(ahd),
2628                        pcomp ? "Enable" : "Disable");
2629 #endif
2630
2631         if (pcomp) {
2632                 uint8_t precomp;
2633
2634                 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2635                         struct ahd_linux_iocell_opts *iocell_opts;
2636
2637                         iocell_opts = &aic79xx_iocell_info[ahd->unit];
2638                         precomp = iocell_opts->precomp;
2639                 } else {
2640                         precomp = AIC79XX_DEFAULT_PRECOMP;
2641                 }
2642                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2643                 AHD_SET_PRECOMP(ahd, precomp);
2644         } else {
2645                 AHD_SET_PRECOMP(ahd, 0);
2646         }
2647
2648         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2649                             starget->channel + 'A', ROLE_INITIATOR);
2650         ahd_find_syncrate(ahd, &period, &ppr_options,
2651                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2652
2653         ahd_lock(ahd, &flags);
2654         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2655                          ppr_options, AHD_TRANS_GOAL, FALSE);
2656         ahd_unlock(ahd, &flags);
2657 }
2658
2659 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2660 {
2661         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2662         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2663         struct ahd_tmode_tstate *tstate;
2664         struct ahd_initiator_tinfo *tinfo
2665                 = ahd_fetch_transinfo(ahd,
2666                                       starget->channel + 'A',
2667                                       shost->this_id, starget->id, &tstate);
2668         struct ahd_devinfo devinfo;
2669         unsigned int ppr_options = tinfo->goal.ppr_options
2670                 & ~MSG_EXT_PPR_HOLD_MCS;
2671         unsigned int period = tinfo->goal.period;
2672         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2673         unsigned long flags;
2674
2675         if (hold)
2676                 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2677
2678         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2679                             starget->channel + 'A', ROLE_INITIATOR);
2680         ahd_find_syncrate(ahd, &period, &ppr_options,
2681                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2682
2683         ahd_lock(ahd, &flags);
2684         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2685                          ppr_options, AHD_TRANS_GOAL, FALSE);
2686         ahd_unlock(ahd, &flags);
2687 }
2688
2689 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2690 {
2691         struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2692         unsigned long flags;
2693         u8 mode;
2694
2695         ahd_lock(ahd, &flags);
2696         ahd_pause(ahd);
2697         mode = ahd_inb(ahd, SBLKCTL);
2698         ahd_unpause(ahd);
2699         ahd_unlock(ahd, &flags);
2700
2701         if (mode & ENAB40)
2702                 spi_signalling(shost) = SPI_SIGNAL_LVD;
2703         else if (mode & ENAB20)
2704                 spi_signalling(shost) = SPI_SIGNAL_SE;
2705         else
2706                 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2707 }
2708
2709 static struct spi_function_template ahd_linux_transport_functions = {
2710         .set_offset     = ahd_linux_set_offset,
2711         .show_offset    = 1,
2712         .set_period     = ahd_linux_set_period,
2713         .show_period    = 1,
2714         .set_width      = ahd_linux_set_width,
2715         .show_width     = 1,
2716         .set_dt         = ahd_linux_set_dt,
2717         .show_dt        = 1,
2718         .set_iu         = ahd_linux_set_iu,
2719         .show_iu        = 1,
2720         .set_qas        = ahd_linux_set_qas,
2721         .show_qas       = 1,
2722         .set_rd_strm    = ahd_linux_set_rd_strm,
2723         .show_rd_strm   = 1,
2724         .set_wr_flow    = ahd_linux_set_wr_flow,
2725         .show_wr_flow   = 1,
2726         .set_rti        = ahd_linux_set_rti,
2727         .show_rti       = 1,
2728         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2729         .show_pcomp_en  = 1,
2730         .set_hold_mcs   = ahd_linux_set_hold_mcs,
2731         .show_hold_mcs  = 1,
2732         .get_signalling = ahd_linux_get_signalling,
2733 };
2734
2735 static int __init
2736 ahd_linux_init(void)
2737 {
2738         int     error = 0;
2739
2740         /*
2741          * If we've been passed any parameters, process them now.
2742          */
2743         if (aic79xx)
2744                 aic79xx_setup(aic79xx);
2745
2746         ahd_linux_transport_template =
2747                 spi_attach_transport(&ahd_linux_transport_functions);
2748         if (!ahd_linux_transport_template)
2749                 return -ENODEV;
2750
2751         scsi_transport_reserve_device(ahd_linux_transport_template,
2752                                       sizeof(struct ahd_linux_device));
2753
2754         error = ahd_linux_pci_init();
2755         if (error)
2756                 spi_release_transport(ahd_linux_transport_template);
2757         return error;
2758 }
2759
2760 static void __exit
2761 ahd_linux_exit(void)
2762 {
2763         ahd_linux_pci_exit();
2764         spi_release_transport(ahd_linux_transport_template);
2765 }
2766
2767 module_init(ahd_linux_init);
2768 module_exit(ahd_linux_exit);