drivers/scsi/aic7xxx/aic79xx_osm.c

   1 /*
   2  * Adaptec AIC79xx device driver for Linux.
   3  *
   4  * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
   5  *
   6  * --------------------------------------------------------------------------
   7  * Copyright (c) 1994-2000 Justin T. Gibbs.
   8  * Copyright (c) 1997-1999 Doug Ledford
   9  * Copyright (c) 2000-2003 Adaptec Inc.
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions, and the following disclaimer,
  17  *    without modification.
  18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19  *    substantially similar to the "NO WARRANTY" disclaimer below
  20  *    ("Disclaimer") and any redistribution must be conditioned upon
  21  *    including a substantially similar Disclaimer requirement for further
  22  *    binary redistribution.
  23  * 3. Neither the names of the above-listed copyright holders nor the names
  24  *    of any contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * Alternatively, this software may be distributed under the terms of the
  28  * GNU General Public License ("GPL") version 2 as published by the Free
  29  * Software Foundation.
  30  *
  31  * NO WARRANTY
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGES.
  43  */
  44
  45 #include "aic79xx_osm.h"
  46 #include "aic79xx_inline.h"
  47 #include <scsi/scsicam.h>
  48
  49 static struct scsi_transport_template *ahd_linux_transport_template = NULL;
  50
  51 #include <linux/init.h>         /* __setup */
  52 #include <linux/mm.h>           /* For fetching system memory size */
  53 #include <linux/blkdev.h>               /* For block_size() */
  54 #include <linux/delay.h>        /* For ssleep/msleep */
  55 #include <linux/device.h>
  56
  57 /*
  58  * Bucket size for counting good commands in between bad ones.
  59  */
  60 #define AHD_LINUX_ERR_THRESH    1000
  61
  62 /*
  63  * Set this to the delay in seconds after SCSI bus reset.
  64  * Note, we honor this only for the initial bus reset.
  65  * The scsi error recovery code performs its own bus settle
  66  * delay handling for error recovery actions.
  67  */
  68 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
  69 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
  70 #else
  71 #define AIC79XX_RESET_DELAY 5000
  72 #endif
  73
  74 /*
  75  * To change the default number of tagged transactions allowed per-device,
  76  * add a line to the lilo.conf file like:
  77  * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
  78  * which will result in the first four devices on the first two
  79  * controllers being set to a tagged queue depth of 32.
  80  *
  81  * The tag_commands is an array of 16 to allow for wide and twin adapters.
  82  * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
  83  * for channel 1.
  84  */
  85 typedef struct {
  86         uint16_t tag_commands[16];      /* Allow for wide/twin adapters. */
  87 } adapter_tag_info_t;
  88
  89 /*
  90  * Modify this as you see fit for your system.
  91  *
  92  * 0                    tagged queuing disabled
  93  * 1 <= n <= 253        n == max tags ever dispatched.
  94  *
  95  * The driver will throttle the number of commands dispatched to a
  96  * device if it returns queue full.  For devices with a fixed maximum
  97  * queue depth, the driver will eventually determine this depth and
  98  * lock it in (a console message is printed to indicate that a lock
  99  * has occurred).  On some devices, queue full is returned for a temporary
 100  * resource shortage.  These devices will return queue full at varying
 101  * depths.  The driver will throttle back when the queue fulls occur and
 102  * attempt to slowly increase the depth over time as the device recovers
 103  * from the resource shortage.
 104  *
 105  * In this example, the first line will disable tagged queueing for all
 106  * the devices on the first probed aic79xx adapter.
 107  *
 108  * The second line enables tagged queueing with 4 commands/LUN for IDs
 109  * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
 110  * driver to attempt to use up to 64 tags for ID 1.
 111  *
 112  * The third line is the same as the first line.
 113  *
 114  * The fourth line disables tagged queueing for devices 0 and 3.  It
 115  * enables tagged queueing for the other IDs, with 16 commands/LUN
 116  * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
 117  * IDs 2, 5-7, and 9-15.
 118  */
 119
 120 /*
 121  * NOTE: The below structure is for reference only, the actual structure
 122  *       to modify in order to change things is just below this comment block.
 123 adapter_tag_info_t aic79xx_tag_info[] =
 124 {
 125         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 126         {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
 127         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 128         {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
 129 };
 130 */
 131
 132 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
 133 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
 134 #else
 135 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
 136 #endif
 137
 138 #define AIC79XX_CONFIGED_TAG_COMMANDS {                                 \
 139         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 140         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 141         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 142         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 143         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 144         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 145         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
 146         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE                \
 147 }
 148
 149 /*
 150  * By default, use the number of commands specified by
 151  * the users kernel configuration.
 152  */
 153 static adapter_tag_info_t aic79xx_tag_info[] =
 154 {
 155         {AIC79XX_CONFIGED_TAG_COMMANDS},
 156         {AIC79XX_CONFIGED_TAG_COMMANDS},
 157         {AIC79XX_CONFIGED_TAG_COMMANDS},
 158         {AIC79XX_CONFIGED_TAG_COMMANDS},
 159         {AIC79XX_CONFIGED_TAG_COMMANDS},
 160         {AIC79XX_CONFIGED_TAG_COMMANDS},
 161         {AIC79XX_CONFIGED_TAG_COMMANDS},
 162         {AIC79XX_CONFIGED_TAG_COMMANDS},
 163         {AIC79XX_CONFIGED_TAG_COMMANDS},
 164         {AIC79XX_CONFIGED_TAG_COMMANDS},
 165         {AIC79XX_CONFIGED_TAG_COMMANDS},
 166         {AIC79XX_CONFIGED_TAG_COMMANDS},
 167         {AIC79XX_CONFIGED_TAG_COMMANDS},
 168         {AIC79XX_CONFIGED_TAG_COMMANDS},
 169         {AIC79XX_CONFIGED_TAG_COMMANDS},
 170         {AIC79XX_CONFIGED_TAG_COMMANDS}
 171 };
 172
 173 /*
 174  * The I/O cell on the chip is very configurable in respect to its analog
 175  * characteristics.  Set the defaults here; they can be overriden with
 176  * the proper insmod parameters.
 177  */
 178 struct ahd_linux_iocell_opts
 179 {
 180         uint8_t precomp;
 181         uint8_t slewrate;
 182         uint8_t amplitude;
 183 };
 184 #define AIC79XX_DEFAULT_PRECOMP         0xFF
 185 #define AIC79XX_DEFAULT_SLEWRATE        0xFF
 186 #define AIC79XX_DEFAULT_AMPLITUDE       0xFF
 187 #define AIC79XX_DEFAULT_IOOPTS                  \
 188 {                                               \
 189         AIC79XX_DEFAULT_PRECOMP,                \
 190         AIC79XX_DEFAULT_SLEWRATE,               \
 191         AIC79XX_DEFAULT_AMPLITUDE               \
 192 }
 193 #define AIC79XX_PRECOMP_INDEX   0
 194 #define AIC79XX_SLEWRATE_INDEX  1
 195 #define AIC79XX_AMPLITUDE_INDEX 2
 196 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
 197 {
 198         AIC79XX_DEFAULT_IOOPTS,
 199         AIC79XX_DEFAULT_IOOPTS,
 200         AIC79XX_DEFAULT_IOOPTS,
 201         AIC79XX_DEFAULT_IOOPTS,
 202         AIC79XX_DEFAULT_IOOPTS,
 203         AIC79XX_DEFAULT_IOOPTS,
 204         AIC79XX_DEFAULT_IOOPTS,
 205         AIC79XX_DEFAULT_IOOPTS,
 206         AIC79XX_DEFAULT_IOOPTS,
 207         AIC79XX_DEFAULT_IOOPTS,
 208         AIC79XX_DEFAULT_IOOPTS,
 209         AIC79XX_DEFAULT_IOOPTS,
 210         AIC79XX_DEFAULT_IOOPTS,
 211         AIC79XX_DEFAULT_IOOPTS,
 212         AIC79XX_DEFAULT_IOOPTS,
 213         AIC79XX_DEFAULT_IOOPTS
 214 };
 215
 216 /*
 217  * There should be a specific return value for this in scsi.h, but
 218  * it seems that most drivers ignore it.
 219  */
 220 #define DID_UNDERFLOW   DID_ERROR
 221
 222 void
 223 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
 224 {
 225         printk("(scsi%d:%c:%d:%d): ",
 226                ahd->platform_data->host->host_no,
 227                scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
 228                scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
 229                scb != NULL ? SCB_GET_LUN(scb) : -1);
 230 }
 231
 232 /*
 233  * XXX - these options apply unilaterally to _all_ adapters
 234  *       cards in the system.  This should be fixed.  Exceptions to this
 235  *       rule are noted in the comments.
 236  */
 237
 238 /*
 239  * Skip the scsi bus reset.  Non 0 make us skip the reset at startup.  This
 240  * has no effect on any later resets that might occur due to things like
 241  * SCSI bus timeouts.
 242  */
 243 static uint32_t aic79xx_no_reset;
 244
 245 /*
 246  * Should we force EXTENDED translation on a controller.
 247  *     0 == Use whatever is in the SEEPROM or default to off
 248  *     1 == Use whatever is in the SEEPROM or default to on
 249  */
 250 static uint32_t aic79xx_extended;
 251
 252 /*
 253  * PCI bus parity checking of the Adaptec controllers.  This is somewhat
 254  * dubious at best.  To my knowledge, this option has never actually
 255  * solved a PCI parity problem, but on certain machines with broken PCI
 256  * chipset configurations, it can generate tons of false error messages.
 257  * It's included in the driver for completeness.
 258  *   0     = Shut off PCI parity check
 259  *   non-0 = Enable PCI parity check
 260  *
 261  * NOTE: you can't actually pass -1 on the lilo prompt.  So, to set this
 262  * variable to -1 you would actually want to simply pass the variable
 263  * name without a number.  That will invert the 0 which will result in
 264  * -1.
 265  */
 266 static uint32_t aic79xx_pci_parity = ~0;
 267
 268 /*
 269  * There are lots of broken chipsets in the world.  Some of them will
 270  * violate the PCI spec when we issue byte sized memory writes to our
 271  * controller.  I/O mapped register access, if allowed by the given
 272  * platform, will work in almost all cases.
 273  */
 274 uint32_t aic79xx_allow_memio = ~0;
 275
 276 /*
 277  * So that we can set how long each device is given as a selection timeout.
 278  * The table of values goes like this:
 279  *   0 - 256ms
 280  *   1 - 128ms
 281  *   2 - 64ms
 282  *   3 - 32ms
 283  * We default to 256ms because some older devices need a longer time
 284  * to respond to initial selection.
 285  */
 286 static uint32_t aic79xx_seltime;
 287
 288 /*
 289  * Certain devices do not perform any aging on commands.  Should the
 290  * device be saturated by commands in one portion of the disk, it is
 291  * possible for transactions on far away sectors to never be serviced.
 292  * To handle these devices, we can periodically send an ordered tag to
 293  * force all outstanding transactions to be serviced prior to a new
 294  * transaction.
 295  */
 296 static uint32_t aic79xx_periodic_otag;
 297
 298 /* Some storage boxes are using an LSI chip which has a bug making it
 299  * impossible to use aic79xx Rev B chip in 320 speeds.  The following
 300  * storage boxes have been reported to be buggy:
 301  * EonStor 3U 16-Bay: U16U-G3A3
 302  * EonStor 2U 12-Bay: U12U-G3A3
 303  * SentinelRAID: 2500F R5 / R6
 304  * SentinelRAID: 2500F R1
 305  * SentinelRAID: 2500F/1500F
 306  * SentinelRAID: 150F
 307  *
 308  * To get around this LSI bug, you can set your board to 160 mode
 309  * or you can enable the SLOWCRC bit.
 310  */
 311 uint32_t aic79xx_slowcrc;
 312
 313 /*
 314  * Module information and settable options.
 315  */
 316 static char *aic79xx = NULL;
 317
 318 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
 319 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
 320 MODULE_LICENSE("Dual BSD/GPL");
 321 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
 322 module_param(aic79xx, charp, 0444);
 323 MODULE_PARM_DESC(aic79xx,
 324 "period-delimited options string:\n"
 325 "       verbose                 Enable verbose/diagnostic logging\n"
 326 "       allow_memio             Allow device registers to be memory mapped\n"
 327 "       debug                   Bitmask of debug values to enable\n"
 328 "       no_reset                Suppress initial bus resets\n"
 329 "       extended                Enable extended geometry on all controllers\n"
 330 "       periodic_otag           Send an ordered tagged transaction\n"
 331 "                               periodically to prevent tag starvation.\n"
 332 "                               This may be required by some older disk\n"
 333 "                               or drives/RAID arrays.\n"
 334 "       tag_info:<tag_str>      Set per-target tag depth\n"
 335 "       global_tag_depth:<int>  Global tag depth for all targets on all buses\n"
 336 "       slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
 337 "       precomp:<pcomp_list>    Set the signal precompensation (0-7).\n"
 338 "       amplitude:<int>         Set the signal amplitude (0-7).\n"
 339 "       seltime:<int>           Selection Timeout:\n"
 340 "                               (0/256ms,1/128ms,2/64ms,3/32ms)\n"
 341 "       slowcrc                 Turn on the SLOWCRC bit (Rev B only)\n"
 342 "\n"
 343 "       Sample /etc/modprobe.conf line:\n"
 344 "               Enable verbose logging\n"
 345 "               Set tag depth on Controller 2/Target 2 to 10 tags\n"
 346 "               Shorten the selection timeout to 128ms\n"
 347 "\n"
 348 "       options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
 349 );
 350
 351 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
 352                                          struct scsi_device *,
 353                                          struct scb *);
 354 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
 355                                          struct scsi_cmnd *cmd);
 356 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
 357 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
 358 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
 359                                      struct ahd_devinfo *devinfo);
 360 static void ahd_linux_device_queue_depth(struct scsi_device *);
 361 static int ahd_linux_run_command(struct ahd_softc*,
 362                                  struct ahd_linux_device *,
 363                                  struct scsi_cmnd *);
 364 static void ahd_linux_setup_tag_info_global(char *p);
 365 static int  aic79xx_setup(char *c);
 366 static void ahd_freeze_simq(struct ahd_softc *ahd);
 367 static void ahd_release_simq(struct ahd_softc *ahd);
 368
 369 static int ahd_linux_unit;
 370
 371
 372 /****************************** 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
 380         cmd = scb->io_ctx;
 381         ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
 382         scsi_dma_unmap(cmd);
 383 }
 384
 385 /******************************** Macros **************************************/
 386 #define BUILD_SCSIID(ahd, cmd)                                          \
 387         (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
 388
 389 /*
 390  * Return a string describing the driver.
 391  */
 392 static const char *
 393 ahd_linux_info(struct Scsi_Host *host)
 394 {
 395         static char buffer[512];
 396         char    ahd_info[256];
 397         char   *bp;
 398         struct ahd_softc *ahd;
 399
 400         bp = &buffer[0];
 401         ahd = *(struct ahd_softc **)host->hostdata;
 402         memset(bp, 0, sizeof(buffer));
 403         strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
 404         strcat(bp, AIC79XX_DRIVER_VERSION);
 405         strcat(bp, "\n");
 406         strcat(bp, "        <");
 407         strcat(bp, ahd->description);
 408         strcat(bp, ">\n");
 409         strcat(bp, "        ");
 410         ahd_controller_info(ahd, ahd_info);
 411         strcat(bp, ahd_info);
 412
 413         return (bp);
 414 }
 415
 416 /*
 417  * Queue an SCB to the controller.
 418  */
 419 static int
 420 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 421 {
 422         struct   ahd_softc *ahd;
 423         struct   ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
 424         int rtn = SCSI_MLQUEUE_HOST_BUSY;
 425
 426         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 427
 428         cmd->scsi_done = scsi_done;
 429         cmd->result = CAM_REQ_INPROG << 16;
 430         rtn = ahd_linux_run_command(ahd, dev, cmd);
 431
 432         return rtn;
 433 }
 434
 435 static inline struct scsi_target **
 436 ahd_linux_target_in_softc(struct scsi_target *starget)
 437 {
 438         struct  ahd_softc *ahd =
 439                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 440         unsigned int target_offset;
 441
 442         target_offset = starget->id;
 443         if (starget->channel != 0)
 444                 target_offset += 8;
 445
 446         return &ahd->platform_data->starget[target_offset];
 447 }
 448
 449 static int
 450 ahd_linux_target_alloc(struct scsi_target *starget)
 451 {
 452         struct  ahd_softc *ahd =
 453                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 454         struct seeprom_config *sc = ahd->seep_config;
 455         unsigned long flags;
 456         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 457         struct ahd_devinfo devinfo;
 458         struct ahd_initiator_tinfo *tinfo;
 459         struct ahd_tmode_tstate *tstate;
 460         char channel = starget->channel + 'A';
 461
 462         ahd_lock(ahd, &flags);
 463
 464         BUG_ON(*ahd_targp != NULL);
 465
 466         *ahd_targp = starget;
 467
 468         if (sc) {
 469                 int flags = sc->device_flags[starget->id];
 470
 471                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 472                                             starget->id, &tstate);
 473
 474                 if ((flags  & CFPACKETIZED) == 0) {
 475                         /* Do not negotiate packetized transfers */
 476                         spi_rd_strm(starget) = 0;
 477                         spi_pcomp_en(starget) = 0;
 478                         spi_rti(starget) = 0;
 479                         spi_wr_flow(starget) = 0;
 480                         spi_hold_mcs(starget) = 0;
 481                 } else {
 482                         if ((ahd->features & AHD_RTI) == 0)
 483                                 spi_rti(starget) = 0;
 484                 }
 485
 486                 if ((flags & CFQAS) == 0)
 487                         spi_qas(starget) = 0;
 488
 489                 /* Transinfo values have been set to BIOS settings */
 490                 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
 491                 spi_min_period(starget) = tinfo->user.period;
 492                 spi_max_offset(starget) = tinfo->user.offset;
 493         }
 494
 495         tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
 496                                     starget->id, &tstate);
 497         ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
 498                             CAM_LUN_WILDCARD, channel,
 499                             ROLE_INITIATOR);
 500         ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
 501                          AHD_TRANS_GOAL, /*paused*/FALSE);
 502         ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
 503                       AHD_TRANS_GOAL, /*paused*/FALSE);
 504         ahd_unlock(ahd, &flags);
 505
 506         return 0;
 507 }
 508
 509 static void
 510 ahd_linux_target_destroy(struct scsi_target *starget)
 511 {
 512         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 513
 514         *ahd_targp = NULL;
 515 }
 516
 517 static int
 518 ahd_linux_slave_alloc(struct scsi_device *sdev)
 519 {
 520         struct  ahd_softc *ahd =
 521                 *((struct ahd_softc **)sdev->host->hostdata);
 522         struct ahd_linux_device *dev;
 523
 524         if (bootverbose)
 525                 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
 526
 527         dev = scsi_transport_device_data(sdev);
 528         memset(dev, 0, sizeof(*dev));
 529
 530         /*
 531          * We start out life using untagged
 532          * transactions of which we allow one.
 533          */
 534         dev->openings = 1;
 535
 536         /*
 537          * Set maxtags to 0.  This will be changed if we
 538          * later determine that we are dealing with
 539          * a tagged queuing capable device.
 540          */
 541         dev->maxtags = 0;
 542
 543         return (0);
 544 }
 545
 546 static int
 547 ahd_linux_slave_configure(struct scsi_device *sdev)
 548 {
 549         struct  ahd_softc *ahd;
 550
 551         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 552         if (bootverbose)
 553                 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
 554
 555         ahd_linux_device_queue_depth(sdev);
 556
 557         /* Initial Domain Validation */
 558         if (!spi_initial_dv(sdev->sdev_target))
 559                 spi_dv_device(sdev);
 560
 561         return 0;
 562 }
 563
 564 #if defined(__i386__)
 565 /*
 566  * Return the disk geometry for the given SCSI device.
 567  */
 568 static int
 569 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 570                     sector_t capacity, int geom[])
 571 {
 572         uint8_t *bh;
 573         int      heads;
 574         int      sectors;
 575         int      cylinders;
 576         int      ret;
 577         int      extended;
 578         struct   ahd_softc *ahd;
 579
 580         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 581
 582         bh = scsi_bios_ptable(bdev);
 583         if (bh) {
 584                 ret = scsi_partsize(bh, capacity,
 585                                     &geom[2], &geom[0], &geom[1]);
 586                 kfree(bh);
 587                 if (ret != -1)
 588                         return (ret);
 589         }
 590         heads = 64;
 591         sectors = 32;
 592         cylinders = aic_sector_div(capacity, heads, sectors);
 593
 594         if (aic79xx_extended != 0)
 595                 extended = 1;
 596         else
 597                 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
 598         if (extended && cylinders >= 1024) {
 599                 heads = 255;
 600                 sectors = 63;
 601                 cylinders = aic_sector_div(capacity, heads, sectors);
 602         }
 603         geom[0] = heads;
 604         geom[1] = sectors;
 605         geom[2] = cylinders;
 606         return (0);
 607 }
 608 #endif
 609
 610 /*
 611  * Abort the current SCSI command(s).
 612  */
 613 static int
 614 ahd_linux_abort(struct scsi_cmnd *cmd)
 615 {
 616         int error;
 617
 618         error = ahd_linux_queue_abort_cmd(cmd);
 619
 620         return error;
 621 }
 622
 623 /*
 624  * Attempt to send a target reset message to the device that timed out.
 625  */
 626 static int
 627 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
 628 {
 629         struct ahd_softc *ahd;
 630         struct ahd_linux_device *dev;
 631         struct scb *reset_scb;
 632         u_int  cdb_byte;
 633         int    retval = SUCCESS;
 634         int    paused;
 635         int    wait;
 636         struct  ahd_initiator_tinfo *tinfo;
 637         struct  ahd_tmode_tstate *tstate;
 638         unsigned long flags;
 639         DECLARE_COMPLETION_ONSTACK(done);
 640
 641         reset_scb = NULL;
 642         paused = FALSE;
 643         wait = FALSE;
 644         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 645
 646         scmd_printk(KERN_INFO, cmd,
 647                     "Attempting to queue a TARGET RESET message:");
 648
 649         printf("CDB:");
 650         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
 651                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
 652         printf("\n");
 653
 654         /*
 655          * Determine if we currently own this command.
 656          */
 657         dev = scsi_transport_device_data(cmd->device);
 658
 659         if (dev == NULL) {
 660                 /*
 661                  * No target device for this command exists,
 662                  * so we must not still own the command.
 663                  */
 664                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
 665                 return SUCCESS;
 666         }
 667
 668         /*
 669          * Generate us a new SCB
 670          */
 671         reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
 672         if (!reset_scb) {
 673                 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
 674                 return FAILED;
 675         }
 676
 677         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 678                                     cmd->device->id, &tstate);
 679         reset_scb->io_ctx = cmd;
 680         reset_scb->platform_data->dev = dev;
 681         reset_scb->sg_count = 0;
 682         ahd_set_residual(reset_scb, 0);
 683         ahd_set_sense_residual(reset_scb, 0);
 684         reset_scb->platform_data->xfer_len = 0;
 685         reset_scb->hscb->control = 0;
 686         reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
 687         reset_scb->hscb->lun = cmd->device->lun;
 688         reset_scb->hscb->cdb_len = 0;
 689         reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
 690         reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
 691         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 692                 reset_scb->flags |= SCB_PACKETIZED;
 693         } else {
 694                 reset_scb->hscb->control |= MK_MESSAGE;
 695         }
 696         dev->openings--;
 697         dev->active++;
 698         dev->commands_issued++;
 699
 700         ahd_lock(ahd, &flags);
 701
 702         LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
 703         ahd_queue_scb(ahd, reset_scb);
 704
 705         ahd->platform_data->eh_done = &done;
 706         ahd_unlock(ahd, &flags);
 707
 708         printf("%s: Device reset code sleeping\n", ahd_name(ahd));
 709         if (!wait_for_completion_timeout(&done, 5 * HZ)) {
 710                 ahd_lock(ahd, &flags);
 711                 ahd->platform_data->eh_done = NULL;
 712                 ahd_unlock(ahd, &flags);
 713                 printf("%s: Device reset timer expired (active %d)\n",
 714                        ahd_name(ahd), dev->active);
 715                 retval = FAILED;
 716         }
 717         printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
 718
 719         return (retval);
 720 }
 721
 722 /*
 723  * Reset the SCSI bus.
 724  */
 725 static int
 726 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 727 {
 728         struct ahd_softc *ahd;
 729         int    found;
 730         unsigned long flags;
 731
 732         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 733 #ifdef AHD_DEBUG
 734         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 735                 printf("%s: Bus reset called for cmd %p\n",
 736                        ahd_name(ahd), cmd);
 737 #endif
 738         ahd_lock(ahd, &flags);
 739
 740         found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 741                                   /*initiate reset*/TRUE);
 742         ahd_unlock(ahd, &flags);
 743
 744         if (bootverbose)
 745                 printf("%s: SCSI bus reset delivered. "
 746                        "%d SCBs aborted.\n", ahd_name(ahd), found);
 747
 748         return (SUCCESS);
 749 }
 750
 751 struct scsi_host_template aic79xx_driver_template = {
 752         .module                 = THIS_MODULE,
 753         .name                   = "aic79xx",
 754         .proc_name              = "aic79xx",
 755         .proc_info              = ahd_linux_proc_info,
 756         .info                   = ahd_linux_info,
 757         .queuecommand           = ahd_linux_queue,
 758         .eh_abort_handler       = ahd_linux_abort,
 759         .eh_device_reset_handler = ahd_linux_dev_reset,
 760         .eh_bus_reset_handler   = ahd_linux_bus_reset,
 761 #if defined(__i386__)
 762         .bios_param             = ahd_linux_biosparam,
 763 #endif
 764         .can_queue              = AHD_MAX_QUEUE,
 765         .this_id                = -1,
 766         .max_sectors            = 8192,
 767         .cmd_per_lun            = 2,
 768         .use_clustering         = ENABLE_CLUSTERING,
 769         .slave_alloc            = ahd_linux_slave_alloc,
 770         .slave_configure        = ahd_linux_slave_configure,
 771         .target_alloc           = ahd_linux_target_alloc,
 772         .target_destroy         = ahd_linux_target_destroy,
 773 };
 774
 775 /******************************** Bus DMA *************************************/
 776 int
 777 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
 778                    bus_size_t alignment, bus_size_t boundary,
 779                    dma_addr_t lowaddr, dma_addr_t highaddr,
 780                    bus_dma_filter_t *filter, void *filterarg,
 781                    bus_size_t maxsize, int nsegments,
 782                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
 783 {
 784         bus_dma_tag_t dmat;
 785
 786         dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
 787         if (dmat == NULL)
 788                 return (ENOMEM);
 789
 790         /*
 791          * Linux is very simplistic about DMA memory.  For now don't
 792          * maintain all specification information.  Once Linux supplies
 793          * better facilities for doing these operations, or the
 794          * needs of this particular driver change, we might need to do
 795          * more here.
 796          */
 797         dmat->alignment = alignment;
 798         dmat->boundary = boundary;
 799         dmat->maxsize = maxsize;
 800         *ret_tag = dmat;
 801         return (0);
 802 }
 803
 804 void
 805 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
 806 {
 807         free(dmat, M_DEVBUF);
 808 }
 809
 810 int
 811 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
 812                  int flags, bus_dmamap_t *mapp)
 813 {
 814         *vaddr = pci_alloc_consistent(ahd->dev_softc,
 815                                       dmat->maxsize, mapp);
 816         if (*vaddr == NULL)
 817                 return (ENOMEM);
 818         return(0);
 819 }
 820
 821 void
 822 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
 823                 void* vaddr, bus_dmamap_t map)
 824 {
 825         pci_free_consistent(ahd->dev_softc, dmat->maxsize,
 826                             vaddr, map);
 827 }
 828
 829 int
 830 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
 831                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
 832                 void *cb_arg, int flags)
 833 {
 834         /*
 835          * Assume for now that this will only be used during
 836          * initialization and not for per-transaction buffer mapping.
 837          */
 838         bus_dma_segment_t stack_sg;
 839
 840         stack_sg.ds_addr = map;
 841         stack_sg.ds_len = dmat->maxsize;
 842         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
 843         return (0);
 844 }
 845
 846 void
 847 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 848 {
 849 }
 850
 851 int
 852 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 853 {
 854         /* Nothing to do */
 855         return (0);
 856 }
 857
 858 /********************* Platform Dependent Functions ***************************/
 859 static void
 860 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
 861 {
 862
 863         if ((instance >= 0)
 864          && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
 865                 uint8_t *iocell_info;
 866
 867                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
 868                 iocell_info[index] = value & 0xFFFF;
 869                 if (bootverbose)
 870                         printf("iocell[%d:%ld] = %d\n", instance, index, value);
 871         }
 872 }
 873
 874 static void
 875 ahd_linux_setup_tag_info_global(char *p)
 876 {
 877         int tags, i, j;
 878
 879         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
 880         printf("Setting Global Tags= %d\n", tags);
 881
 882         for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
 883                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
 884                         aic79xx_tag_info[i].tag_commands[j] = tags;
 885                 }
 886         }
 887 }
 888
 889 static void
 890 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
 891 {
 892
 893         if ((instance >= 0) && (targ >= 0)
 894          && (instance < ARRAY_SIZE(aic79xx_tag_info))
 895          && (targ < AHD_NUM_TARGETS)) {
 896                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
 897                 if (bootverbose)
 898                         printf("tag_info[%d:%d] = %d\n", instance, targ, value);
 899         }
 900 }
 901
 902 static char *
 903 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
 904                        void (*callback)(u_long, int, int, int32_t),
 905                        u_long callback_arg)
 906 {
 907         char    *tok_end;
 908         char    *tok_end2;
 909         int      i;
 910         int      instance;
 911         int      targ;
 912         int      done;
 913         char     tok_list[] = {'.', ',', '{', '}', '\0'};
 914
 915         /* All options use a ':' name/arg separator */
 916         if (*opt_arg != ':')
 917                 return (opt_arg);
 918         opt_arg++;
 919         instance = -1;
 920         targ = -1;
 921         done = FALSE;
 922         /*
 923          * Restore separator that may be in
 924          * the middle of our option argument.
 925          */
 926         tok_end = strchr(opt_arg, '\0');
 927         if (tok_end < end)
 928                 *tok_end = ',';
 929         while (!done) {
 930                 switch (*opt_arg) {
 931                 case '{':
 932                         if (instance == -1) {
 933                                 instance = 0;
 934                         } else {
 935                                 if (depth > 1) {
 936                                         if (targ == -1)
 937                                                 targ = 0;
 938                                 } else {
 939                                         printf("Malformed Option %s\n",
 940                                                opt_name);
 941                                         done = TRUE;
 942                                 }
 943                         }
 944                         opt_arg++;
 945                         break;
 946                 case '}':
 947                         if (targ != -1)
 948                                 targ = -1;
 949                         else if (instance != -1)
 950                                 instance = -1;
 951                         opt_arg++;
 952                         break;
 953                 case ',':
 954                 case '.':
 955                         if (instance == -1)
 956                                 done = TRUE;
 957                         else if (targ >= 0)
 958                                 targ++;
 959                         else if (instance >= 0)
 960                                 instance++;
 961                         opt_arg++;
 962                         break;
 963                 case '\0':
 964                         done = TRUE;
 965                         break;
 966                 default:
 967                         tok_end = end;
 968                         for (i = 0; tok_list[i]; i++) {
 969                                 tok_end2 = strchr(opt_arg, tok_list[i]);
 970                                 if ((tok_end2) && (tok_end2 < tok_end))
 971                                         tok_end = tok_end2;
 972                         }
 973                         callback(callback_arg, instance, targ,
 974                                  simple_strtol(opt_arg, NULL, 0));
 975                         opt_arg = tok_end;
 976                         break;
 977                 }
 978         }
 979         return (opt_arg);
 980 }
 981
 982 /*
 983  * Handle Linux boot parameters. This routine allows for assigning a value
 984  * to a parameter with a ':' between the parameter and the value.
 985  * ie. aic79xx=stpwlev:1,extended
 986  */
 987 static int
 988 aic79xx_setup(char *s)
 989 {
 990         int     i, n;
 991         char   *p;
 992         char   *end;
 993
 994         static struct {
 995                 const char *name;
 996                 uint32_t *flag;
 997         } options[] = {
 998                 { "extended", &aic79xx_extended },
 999                 { "no_reset", &aic79xx_no_reset },
1000                 { "verbose", &aic79xx_verbose },
1001                 { "allow_memio", &aic79xx_allow_memio},
1002 #ifdef AHD_DEBUG
1003                 { "debug", &ahd_debug },
1004 #endif
1005                 { "periodic_otag", &aic79xx_periodic_otag },
1006                 { "pci_parity", &aic79xx_pci_parity },
1007                 { "seltime", &aic79xx_seltime },
1008                 { "tag_info", NULL },
1009                 { "global_tag_depth", NULL},
1010                 { "slewrate", NULL },
1011                 { "precomp", NULL },
1012                 { "amplitude", NULL },
1013                 { "slowcrc", &aic79xx_slowcrc },
1014         };
1015
1016         end = strchr(s, '\0');
1017
1018         /*
1019          * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1020          * will never be 0 in this case.
1021          */
1022         n = 0;
1023
1024         while ((p = strsep(&s, ",.")) != NULL) {
1025                 if (*p == '\0')
1026                         continue;
1027                 for (i = 0; i < ARRAY_SIZE(options); i++) {
1028
1029                         n = strlen(options[i].name);
1030                         if (strncmp(options[i].name, p, n) == 0)
1031                                 break;
1032                 }
1033                 if (i == ARRAY_SIZE(options))
1034                         continue;
1035
1036                 if (strncmp(p, "global_tag_depth", n) == 0) {
1037                         ahd_linux_setup_tag_info_global(p + n);
1038                 } else if (strncmp(p, "tag_info", n) == 0) {
1039                         s = ahd_parse_brace_option("tag_info", p + n, end,
1040                             2, ahd_linux_setup_tag_info, 0);
1041                 } else if (strncmp(p, "slewrate", n) == 0) {
1042                         s = ahd_parse_brace_option("slewrate",
1043                             p + n, end, 1, ahd_linux_setup_iocell_info,
1044                             AIC79XX_SLEWRATE_INDEX);
1045                 } else if (strncmp(p, "precomp", n) == 0) {
1046                         s = ahd_parse_brace_option("precomp",
1047                             p + n, end, 1, ahd_linux_setup_iocell_info,
1048                             AIC79XX_PRECOMP_INDEX);
1049                 } else if (strncmp(p, "amplitude", n) == 0) {
1050                         s = ahd_parse_brace_option("amplitude",
1051                             p + n, end, 1, ahd_linux_setup_iocell_info,
1052                             AIC79XX_AMPLITUDE_INDEX);
1053                 } else if (p[n] == ':') {
1054                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1055                 } else if (!strncmp(p, "verbose", n)) {
1056                         *(options[i].flag) = 1;
1057                 } else {
1058                         *(options[i].flag) ^= 0xFFFFFFFF;
1059                 }
1060         }
1061         return 1;
1062 }
1063
1064 __setup("aic79xx=", aic79xx_setup);
1065
1066 uint32_t aic79xx_verbose;
1067
1068 int
1069 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1070 {
1071         char    buf[80];
1072         struct  Scsi_Host *host;
1073         char    *new_name;
1074         u_long  s;
1075         int     retval;
1076
1077         template->name = ahd->description;
1078         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1079         if (host == NULL)
1080                 return (ENOMEM);
1081
1082         *((struct ahd_softc **)host->hostdata) = ahd;
1083         ahd->platform_data->host = host;
1084         host->can_queue = AHD_MAX_QUEUE;
1085         host->cmd_per_lun = 2;
1086         host->sg_tablesize = AHD_NSEG;
1087         host->this_id = ahd->our_id;
1088         host->irq = ahd->platform_data->irq;
1089         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1090         host->max_lun = AHD_NUM_LUNS;
1091         host->max_channel = 0;
1092         host->sg_tablesize = AHD_NSEG;
1093         ahd_lock(ahd, &s);
1094         ahd_set_unit(ahd, ahd_linux_unit++);
1095         ahd_unlock(ahd, &s);
1096         sprintf(buf, "scsi%d", host->host_no);
1097         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1098         if (new_name != NULL) {
1099                 strcpy(new_name, buf);
1100                 ahd_set_name(ahd, new_name);
1101         }
1102         host->unique_id = ahd->unit;
1103         ahd_linux_initialize_scsi_bus(ahd);
1104         ahd_intr_enable(ahd, TRUE);
1105
1106         host->transportt = ahd_linux_transport_template;
1107
1108         retval = scsi_add_host(host, &ahd->dev_softc->dev);
1109         if (retval) {
1110                 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1111                 scsi_host_put(host);
1112                 return retval;
1113         }
1114
1115         scsi_scan_host(host);
1116         return 0;
1117 }
1118
1119 /*
1120  * Place the SCSI bus into a known state by either resetting it,
1121  * or forcing transfer negotiations on the next command to any
1122  * target.
1123  */
1124 static void
1125 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1126 {
1127         u_int target_id;
1128         u_int numtarg;
1129         unsigned long s;
1130
1131         target_id = 0;
1132         numtarg = 0;
1133
1134         if (aic79xx_no_reset != 0)
1135                 ahd->flags &= ~AHD_RESET_BUS_A;
1136
1137         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1138                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1139         else
1140                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1141
1142         ahd_lock(ahd, &s);
1143
1144         /*
1145          * Force negotiation to async for all targets that
1146          * will not see an initial bus reset.
1147          */
1148         for (; target_id < numtarg; target_id++) {
1149                 struct ahd_devinfo devinfo;
1150                 struct ahd_initiator_tinfo *tinfo;
1151                 struct ahd_tmode_tstate *tstate;
1152
1153                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1154                                             target_id, &tstate);
1155                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1156                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1157                 ahd_update_neg_request(ahd, &devinfo, tstate,
1158                                        tinfo, AHD_NEG_ALWAYS);
1159         }
1160         ahd_unlock(ahd, &s);
1161         /* Give the bus some time to recover */
1162         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1163                 ahd_freeze_simq(ahd);
1164                 msleep(AIC79XX_RESET_DELAY);
1165                 ahd_release_simq(ahd);
1166         }
1167 }
1168
1169 int
1170 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1171 {
1172         ahd->platform_data =
1173             malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1174         if (ahd->platform_data == NULL)
1175                 return (ENOMEM);
1176         memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1177         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1178         ahd_lockinit(ahd);
1179         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1180         return (0);
1181 }
1182
1183 void
1184 ahd_platform_free(struct ahd_softc *ahd)
1185 {
1186         struct scsi_target *starget;
1187         int i;
1188
1189         if (ahd->platform_data != NULL) {
1190                 /* destroy all of the device and target objects */
1191                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1192                         starget = ahd->platform_data->starget[i];
1193                         if (starget != NULL) {
1194                                 ahd->platform_data->starget[i] = NULL;
1195                         }
1196                 }
1197
1198                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1199                         free_irq(ahd->platform_data->irq, ahd);
1200                 if (ahd->tags[0] == BUS_SPACE_PIO
1201                  && ahd->bshs[0].ioport != 0)
1202                         release_region(ahd->bshs[0].ioport, 256);
1203                 if (ahd->tags[1] == BUS_SPACE_PIO
1204                  && ahd->bshs[1].ioport != 0)
1205                         release_region(ahd->bshs[1].ioport, 256);
1206                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1207                  && ahd->bshs[0].maddr != NULL) {
1208                         iounmap(ahd->bshs[0].maddr);
1209                         release_mem_region(ahd->platform_data->mem_busaddr,
1210                                            0x1000);
1211                 }
1212                 if (ahd->platform_data->host)
1213                         scsi_host_put(ahd->platform_data->host);
1214
1215                 free(ahd->platform_data, M_DEVBUF);
1216         }
1217 }
1218
1219 void
1220 ahd_platform_init(struct ahd_softc *ahd)
1221 {
1222         /*
1223          * Lookup and commit any modified IO Cell options.
1224          */
1225         if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1226                 struct ahd_linux_iocell_opts *iocell_opts;
1227
1228                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1229                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1230                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1231                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1232                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1233                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1234                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1235         }
1236
1237 }
1238
1239 void
1240 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1241 {
1242         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1243                                 SCB_GET_CHANNEL(ahd, scb),
1244                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1245                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1246 }
1247
1248 void
1249 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1250                       struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1251 {
1252         struct ahd_linux_device *dev;
1253         int was_queuing;
1254         int now_queuing;
1255
1256         if (sdev == NULL)
1257                 return;
1258
1259         dev = scsi_transport_device_data(sdev);
1260
1261         if (dev == NULL)
1262                 return;
1263         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1264         switch (alg) {
1265         default:
1266         case AHD_QUEUE_NONE:
1267                 now_queuing = 0;
1268                 break;
1269         case AHD_QUEUE_BASIC:
1270                 now_queuing = AHD_DEV_Q_BASIC;
1271                 break;
1272         case AHD_QUEUE_TAGGED:
1273                 now_queuing = AHD_DEV_Q_TAGGED;
1274                 break;
1275         }
1276         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1277          && (was_queuing != now_queuing)
1278          && (dev->active != 0)) {
1279                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1280                 dev->qfrozen++;
1281         }
1282
1283         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1284         if (now_queuing) {
1285                 u_int usertags;
1286
1287                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1288                 if (!was_queuing) {
1289                         /*
1290                          * Start out agressively and allow our
1291                          * dynamic queue depth algorithm to take
1292                          * care of the rest.
1293                          */
1294                         dev->maxtags = usertags;
1295                         dev->openings = dev->maxtags - dev->active;
1296                 }
1297                 if (dev->maxtags == 0) {
1298                         /*
1299                          * Queueing is disabled by the user.
1300                          */
1301                         dev->openings = 1;
1302                 } else if (alg == AHD_QUEUE_TAGGED) {
1303                         dev->flags |= AHD_DEV_Q_TAGGED;
1304                         if (aic79xx_periodic_otag != 0)
1305                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1306                 } else
1307                         dev->flags |= AHD_DEV_Q_BASIC;
1308         } else {
1309                 /* We can only have one opening. */
1310                 dev->maxtags = 0;
1311                 dev->openings =  1 - dev->active;
1312         }
1313
1314         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1315         case AHD_DEV_Q_BASIC:
1316                 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1317                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1318                 break;
1319         case AHD_DEV_Q_TAGGED:
1320                 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1321                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1322                 break;
1323         default:
1324                 /*
1325                  * We allow the OS to queue 2 untagged transactions to
1326                  * us at any time even though we can only execute them
1327                  * serially on the controller/device.  This should
1328                  * remove some latency.
1329                  */
1330                 scsi_deactivate_tcq(sdev, 1);
1331                 break;
1332         }
1333 }
1334
1335 int
1336 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1337                         int lun, u_int tag, role_t role, uint32_t status)
1338 {
1339         return 0;
1340 }
1341
1342 static u_int
1343 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1344 {
1345         static int warned_user;
1346         u_int tags;
1347
1348         tags = 0;
1349         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1350                 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1351
1352                         if (warned_user == 0) {
1353                                 printf(KERN_WARNING
1354 "aic79xx: WARNING: Insufficient tag_info instances\n"
1355 "aic79xx: for installed controllers.  Using defaults\n"
1356 "aic79xx: Please update the aic79xx_tag_info array in\n"
1357 "aic79xx: the aic79xx_osm.c source file.\n");
1358                                 warned_user++;
1359                         }
1360                         tags = AHD_MAX_QUEUE;
1361                 } else {
1362                         adapter_tag_info_t *tag_info;
1363
1364                         tag_info = &aic79xx_tag_info[ahd->unit];
1365                         tags = tag_info->tag_commands[devinfo->target_offset];
1366                         if (tags > AHD_MAX_QUEUE)
1367                                 tags = AHD_MAX_QUEUE;
1368                 }
1369         }
1370         return (tags);
1371 }
1372
1373 /*
1374  * Determines the queue depth for a given device.
1375  */
1376 static void
1377 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1378 {
1379         struct  ahd_devinfo devinfo;
1380         u_int   tags;
1381         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1382
1383         ahd_compile_devinfo(&devinfo,
1384                             ahd->our_id,
1385                             sdev->sdev_target->id, sdev->lun,
1386                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1387                             ROLE_INITIATOR);
1388         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1389         if (tags != 0 && sdev->tagged_supported != 0) {
1390
1391                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1392                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1393                                devinfo.lun, AC_TRANSFER_NEG);
1394                 ahd_print_devinfo(ahd, &devinfo);
1395                 printf("Tagged Queuing enabled.  Depth %d\n", tags);
1396         } else {
1397                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1398                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1399                                devinfo.lun, AC_TRANSFER_NEG);
1400         }
1401 }
1402
1403 static int
1404 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1405                       struct scsi_cmnd *cmd)
1406 {
1407         struct   scb *scb;
1408         struct   hardware_scb *hscb;
1409         struct   ahd_initiator_tinfo *tinfo;
1410         struct   ahd_tmode_tstate *tstate;
1411         u_int    col_idx;
1412         uint16_t mask;
1413         unsigned long flags;
1414         int nseg;
1415
1416         nseg = scsi_dma_map(cmd);
1417         if (nseg < 0)
1418                 return SCSI_MLQUEUE_HOST_BUSY;
1419
1420         ahd_lock(ahd, &flags);
1421
1422         /*
1423          * Get an scb to use.
1424          */
1425         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1426                                     cmd->device->id, &tstate);
1427         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1428          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1429                 col_idx = AHD_NEVER_COL_IDX;
1430         } else {
1431                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1432                                             cmd->device->lun);
1433         }
1434         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1435                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1436                 ahd_unlock(ahd, &flags);
1437                 scsi_dma_unmap(cmd);
1438                 return SCSI_MLQUEUE_HOST_BUSY;
1439         }
1440
1441         scb->io_ctx = cmd;
1442         scb->platform_data->dev = dev;
1443         hscb = scb->hscb;
1444         cmd->host_scribble = (char *)scb;
1445
1446         /*
1447          * Fill out basics of the HSCB.
1448          */
1449         hscb->control = 0;
1450         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1451         hscb->lun = cmd->device->lun;
1452         scb->hscb->task_management = 0;
1453         mask = SCB_GET_TARGET_MASK(ahd, scb);
1454
1455         if ((ahd->user_discenable & mask) != 0)
1456                 hscb->control |= DISCENB;
1457
1458         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1459                 scb->flags |= SCB_PACKETIZED;
1460
1461         if ((tstate->auto_negotiate & mask) != 0) {
1462                 scb->flags |= SCB_AUTO_NEGOTIATE;
1463                 scb->hscb->control |= MK_MESSAGE;
1464         }
1465
1466         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1467                 int     msg_bytes;
1468                 uint8_t tag_msgs[2];
1469
1470                 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1471                 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1472                         hscb->control |= tag_msgs[0];
1473                         if (tag_msgs[0] == MSG_ORDERED_TASK)
1474                                 dev->commands_since_idle_or_otag = 0;
1475                 } else
1476                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1477                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1478                         hscb->control |= MSG_ORDERED_TASK;
1479                         dev->commands_since_idle_or_otag = 0;
1480                 } else {
1481                         hscb->control |= MSG_SIMPLE_TASK;
1482                 }
1483         }
1484
1485         hscb->cdb_len = cmd->cmd_len;
1486         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1487
1488         scb->platform_data->xfer_len = 0;
1489         ahd_set_residual(scb, 0);
1490         ahd_set_sense_residual(scb, 0);
1491         scb->sg_count = 0;
1492
1493         if (nseg > 0) {
1494                 void *sg = scb->sg_list;
1495                 struct scatterlist *cur_seg;
1496                 int i;
1497
1498                 scb->platform_data->xfer_len = 0;
1499
1500                 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1501                         dma_addr_t addr;
1502                         bus_size_t len;
1503
1504                         addr = sg_dma_address(cur_seg);
1505                         len = sg_dma_len(cur_seg);
1506                         scb->platform_data->xfer_len += len;
1507                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1508                                           i == (nseg - 1));
1509                 }
1510         }
1511
1512         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1513         dev->openings--;
1514         dev->active++;
1515         dev->commands_issued++;
1516
1517         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1518                 dev->commands_since_idle_or_otag++;
1519         scb->flags |= SCB_ACTIVE;
1520         ahd_queue_scb(ahd, scb);
1521
1522         ahd_unlock(ahd, &flags);
1523
1524         return 0;
1525 }
1526
1527 /*
1528  * SCSI controller interrupt handler.
1529  */
1530 irqreturn_t
1531 ahd_linux_isr(int irq, void *dev_id)
1532 {
1533         struct  ahd_softc *ahd;
1534         u_long  flags;
1535         int     ours;
1536
1537         ahd = (struct ahd_softc *) dev_id;
1538         ahd_lock(ahd, &flags);
1539         ours = ahd_intr(ahd);
1540         ahd_unlock(ahd, &flags);
1541         return IRQ_RETVAL(ours);
1542 }
1543
1544 void
1545 ahd_send_async(struct ahd_softc *ahd, char channel,
1546                u_int target, u_int lun, ac_code code)
1547 {
1548         switch (code) {
1549         case AC_TRANSFER_NEG:
1550         {
1551                 char    buf[80];
1552                 struct  scsi_target *starget;
1553                 struct  info_str info;
1554                 struct  ahd_initiator_tinfo *tinfo;
1555                 struct  ahd_tmode_tstate *tstate;
1556                 unsigned int target_ppr_options;
1557
1558                 BUG_ON(target == CAM_TARGET_WILDCARD);
1559
1560                 info.buffer = buf;
1561                 info.length = sizeof(buf);
1562                 info.offset = 0;
1563                 info.pos = 0;
1564                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1565                                             target, &tstate);
1566
1567                 /*
1568                  * Don't bother reporting results while
1569                  * negotiations are still pending.
1570                  */
1571                 if (tinfo->curr.period != tinfo->goal.period
1572                  || tinfo->curr.width != tinfo->goal.width
1573                  || tinfo->curr.offset != tinfo->goal.offset
1574                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1575                         if (bootverbose == 0)
1576                                 break;
1577
1578                 /*
1579                  * Don't bother reporting results that
1580                  * are identical to those last reported.
1581                  */
1582                 starget = ahd->platform_data->starget[target];
1583                 if (starget == NULL)
1584                         break;
1585
1586                 target_ppr_options =
1587                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1588                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1589                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1590                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1591                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1592                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1593                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1594                         + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1595
1596                 if (tinfo->curr.period == spi_period(starget)
1597                     && tinfo->curr.width == spi_width(starget)
1598                     && tinfo->curr.offset == spi_offset(starget)
1599                  && tinfo->curr.ppr_options == target_ppr_options)
1600                         if (bootverbose == 0)
1601                                 break;
1602
1603                 spi_period(starget) = tinfo->curr.period;
1604                 spi_width(starget) = tinfo->curr.width;
1605                 spi_offset(starget) = tinfo->curr.offset;
1606                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1607                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1608                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1609                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1610                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1611                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1612                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1613                 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1614                 spi_display_xfer_agreement(starget);
1615                 break;
1616         }
1617         case AC_SENT_BDR:
1618         {
1619                 WARN_ON(lun != CAM_LUN_WILDCARD);
1620                 scsi_report_device_reset(ahd->platform_data->host,
1621                                          channel - 'A', target);
1622                 break;
1623         }
1624         case AC_BUS_RESET:
1625                 if (ahd->platform_data->host != NULL) {
1626                         scsi_report_bus_reset(ahd->platform_data->host,
1627                                               channel - 'A');
1628                 }
1629                 break;
1630         default:
1631                 panic("ahd_send_async: Unexpected async event");
1632         }
1633 }
1634
1635 /*
1636  * Calls the higher level scsi done function and frees the scb.
1637  */
1638 void
1639 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1640 {
1641         struct scsi_cmnd *cmd;
1642         struct    ahd_linux_device *dev;
1643
1644         if ((scb->flags & SCB_ACTIVE) == 0) {
1645                 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1646                 ahd_dump_card_state(ahd);
1647                 panic("Stopping for safety");
1648         }
1649         LIST_REMOVE(scb, pending_links);
1650         cmd = scb->io_ctx;
1651         dev = scb->platform_data->dev;
1652         dev->active--;
1653         dev->openings++;
1654         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1655                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1656                 dev->qfrozen--;
1657         }
1658         ahd_linux_unmap_scb(ahd, scb);
1659
1660         /*
1661          * Guard against stale sense data.
1662          * The Linux mid-layer assumes that sense
1663          * was retrieved anytime the first byte of
1664          * the sense buffer looks "sane".
1665          */
1666         cmd->sense_buffer[0] = 0;
1667         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1668                 uint32_t amount_xferred;
1669
1670                 amount_xferred =
1671                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1672                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1673 #ifdef AHD_DEBUG
1674                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1675                                 ahd_print_path(ahd, scb);
1676                                 printf("Set CAM_UNCOR_PARITY\n");
1677                         }
1678 #endif
1679                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1680 #ifdef AHD_REPORT_UNDERFLOWS
1681                 /*
1682                  * This code is disabled by default as some
1683                  * clients of the SCSI system do not properly
1684                  * initialize the underflow parameter.  This
1685                  * results in spurious termination of commands
1686                  * that complete as expected (e.g. underflow is
1687                  * allowed as command can return variable amounts
1688                  * of data.
1689                  */
1690                 } else if (amount_xferred < scb->io_ctx->underflow) {
1691                         u_int i;
1692
1693                         ahd_print_path(ahd, scb);
1694                         printf("CDB:");
1695                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1696                                 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1697                         printf("\n");
1698                         ahd_print_path(ahd, scb);
1699                         printf("Saw underflow (%ld of %ld bytes). "
1700                                "Treated as error\n",
1701                                 ahd_get_residual(scb),
1702                                 ahd_get_transfer_length(scb));
1703                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1704 #endif
1705                 } else {
1706                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1707                 }
1708         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1709                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1710         }
1711
1712         if (dev->openings == 1
1713          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1714          && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1715                 dev->tag_success_count++;
1716         /*
1717          * Some devices deal with temporary internal resource
1718          * shortages by returning queue full.  When the queue
1719          * full occurrs, we throttle back.  Slowly try to get
1720          * back to our previous queue depth.
1721          */
1722         if ((dev->openings + dev->active) < dev->maxtags
1723          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1724                 dev->tag_success_count = 0;
1725                 dev->openings++;
1726         }
1727
1728         if (dev->active == 0)
1729                 dev->commands_since_idle_or_otag = 0;
1730
1731         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1732                 printf("Recovery SCB completes\n");
1733                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1734                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1735                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1736
1737                 if (ahd->platform_data->eh_done)
1738                         complete(ahd->platform_data->eh_done);
1739         }
1740
1741         ahd_free_scb(ahd, scb);
1742         ahd_linux_queue_cmd_complete(ahd, cmd);
1743 }
1744
1745 static void
1746 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1747                              struct scsi_device *sdev, struct scb *scb)
1748 {
1749         struct  ahd_devinfo devinfo;
1750         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1751
1752         ahd_compile_devinfo(&devinfo,
1753                             ahd->our_id,
1754                             sdev->sdev_target->id, sdev->lun,
1755                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1756                             ROLE_INITIATOR);
1757
1758         /*
1759          * We don't currently trust the mid-layer to
1760          * properly deal with queue full or busy.  So,
1761          * when one occurs, we tell the mid-layer to
1762          * unconditionally requeue the command to us
1763          * so that we can retry it ourselves.  We also
1764          * implement our own throttling mechanism so
1765          * we don't clobber the device with too many
1766          * commands.
1767          */
1768         switch (ahd_get_scsi_status(scb)) {
1769         default:
1770                 break;
1771         case SCSI_STATUS_CHECK_COND:
1772         case SCSI_STATUS_CMD_TERMINATED:
1773         {
1774                 struct scsi_cmnd *cmd;
1775
1776                 /*
1777                  * Copy sense information to the OS's cmd
1778                  * structure if it is available.
1779                  */
1780                 cmd = scb->io_ctx;
1781                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1782                         struct scsi_status_iu_header *siu;
1783                         u_int sense_size;
1784                         u_int sense_offset;
1785
1786                         if (scb->flags & SCB_SENSE) {
1787                                 sense_size = min(sizeof(struct scsi_sense_data)
1788                                                - ahd_get_sense_residual(scb),
1789                                                  (u_long)SCSI_SENSE_BUFFERSIZE);
1790                                 sense_offset = 0;
1791                         } else {
1792                                 /*
1793                                  * Copy only the sense data into the provided
1794                                  * buffer.
1795                                  */
1796                                 siu = (struct scsi_status_iu_header *)
1797                                     scb->sense_data;
1798                                 sense_size = min_t(size_t,
1799                                                 scsi_4btoul(siu->sense_length),
1800                                                 SCSI_SENSE_BUFFERSIZE);
1801                                 sense_offset = SIU_SENSE_OFFSET(siu);
1802                         }
1803
1804                         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1805                         memcpy(cmd->sense_buffer,
1806                                ahd_get_sense_buf(ahd, scb)
1807                                + sense_offset, sense_size);
1808                         cmd->result |= (DRIVER_SENSE << 24);
1809
1810 #ifdef AHD_DEBUG
1811                         if (ahd_debug & AHD_SHOW_SENSE) {
1812                                 int i;
1813
1814                                 printf("Copied %d bytes of sense data at %d:",
1815                                        sense_size, sense_offset);
1816                                 for (i = 0; i < sense_size; i++) {
1817                                         if ((i & 0xF) == 0)
1818                                                 printf("\n");
1819                                         printf("0x%x ", cmd->sense_buffer[i]);
1820                                 }
1821                                 printf("\n");
1822                         }
1823 #endif
1824                 }
1825                 break;
1826         }
1827         case SCSI_STATUS_QUEUE_FULL:
1828                 /*
1829                  * By the time the core driver has returned this
1830                  * command, all other commands that were queued
1831                  * to us but not the device have been returned.
1832                  * This ensures that dev->active is equal to
1833                  * the number of commands actually queued to
1834                  * the device.
1835                  */
1836                 dev->tag_success_count = 0;
1837                 if (dev->active != 0) {
1838                         /*
1839                          * Drop our opening count to the number
1840                          * of commands currently outstanding.
1841                          */
1842                         dev->openings = 0;
1843 #ifdef AHD_DEBUG
1844                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1845                                 ahd_print_path(ahd, scb);
1846                                 printf("Dropping tag count to %d\n",
1847                                        dev->active);
1848                         }
1849 #endif
1850                         if (dev->active == dev->tags_on_last_queuefull) {
1851
1852                                 dev->last_queuefull_same_count++;
1853                                 /*
1854                                  * If we repeatedly see a queue full
1855                                  * at the same queue depth, this
1856                                  * device has a fixed number of tag
1857                                  * slots.  Lock in this tag depth
1858                                  * so we stop seeing queue fulls from
1859                                  * this device.
1860                                  */
1861                                 if (dev->last_queuefull_same_count
1862                                  == AHD_LOCK_TAGS_COUNT) {
1863                                         dev->maxtags = dev->active;
1864                                         ahd_print_path(ahd, scb);
1865                                         printf("Locking max tag count at %d\n",
1866                                                dev->active);
1867                                 }
1868                         } else {
1869                                 dev->tags_on_last_queuefull = dev->active;
1870                                 dev->last_queuefull_same_count = 0;
1871                         }
1872                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1873                         ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1874                         ahd_platform_set_tags(ahd, sdev, &devinfo,
1875                                      (dev->flags & AHD_DEV_Q_BASIC)
1876                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1877                         break;
1878                 }
1879                 /*
1880                  * Drop down to a single opening, and treat this
1881                  * as if the target returned BUSY SCSI status.
1882                  */
1883                 dev->openings = 1;
1884                 ahd_platform_set_tags(ahd, sdev, &devinfo,
1885                              (dev->flags & AHD_DEV_Q_BASIC)
1886                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1887                 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1888         }
1889 }
1890
1891 static void
1892 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1893 {
1894         int status;
1895         int new_status = DID_OK;
1896         int do_fallback = 0;
1897         int scsi_status;
1898
1899         /*
1900          * Map CAM error codes into Linux Error codes.  We
1901          * avoid the conversion so that the DV code has the
1902          * full error information available when making
1903          * state change decisions.
1904          */
1905
1906         status = ahd_cmd_get_transaction_status(cmd);
1907         switch (status) {
1908         case CAM_REQ_INPROG:
1909         case CAM_REQ_CMP:
1910                 new_status = DID_OK;
1911                 break;
1912         case CAM_AUTOSENSE_FAIL:
1913                 new_status = DID_ERROR;
1914                 /* Fallthrough */
1915         case CAM_SCSI_STATUS_ERROR:
1916                 scsi_status = ahd_cmd_get_scsi_status(cmd);
1917
1918                 switch(scsi_status) {
1919                 case SCSI_STATUS_CMD_TERMINATED:
1920                 case SCSI_STATUS_CHECK_COND:
1921                         if ((cmd->result >> 24) != DRIVER_SENSE) {
1922                                 do_fallback = 1;
1923                         } else {
1924                                 struct scsi_sense_data *sense;
1925
1926                                 sense = (struct scsi_sense_data *)
1927                                         cmd->sense_buffer;
1928                                 if (sense->extra_len >= 5 &&
1929                                     (sense->add_sense_code == 0x47
1930                                      || sense->add_sense_code == 0x48))
1931                                         do_fallback = 1;
1932                         }
1933                         break;
1934                 default:
1935                         break;
1936                 }
1937                 break;
1938         case CAM_REQ_ABORTED:
1939                 new_status = DID_ABORT;
1940                 break;
1941         case CAM_BUSY:
1942                 new_status = DID_BUS_BUSY;
1943                 break;
1944         case CAM_REQ_INVALID:
1945         case CAM_PATH_INVALID:
1946                 new_status = DID_BAD_TARGET;
1947                 break;
1948         case CAM_SEL_TIMEOUT:
1949                 new_status = DID_NO_CONNECT;
1950                 break;
1951         case CAM_SCSI_BUS_RESET:
1952         case CAM_BDR_SENT:
1953                 new_status = DID_RESET;
1954                 break;
1955         case CAM_UNCOR_PARITY:
1956                 new_status = DID_PARITY;
1957                 do_fallback = 1;
1958                 break;
1959         case CAM_CMD_TIMEOUT:
1960                 new_status = DID_TIME_OUT;
1961                 do_fallback = 1;
1962                 break;
1963         case CAM_REQ_CMP_ERR:
1964         case CAM_UNEXP_BUSFREE:
1965         case CAM_DATA_RUN_ERR:
1966                 new_status = DID_ERROR;
1967                 do_fallback = 1;
1968                 break;
1969         case CAM_UA_ABORT:
1970         case CAM_NO_HBA:
1971         case CAM_SEQUENCE_FAIL:
1972         case CAM_CCB_LEN_ERR:
1973         case CAM_PROVIDE_FAIL:
1974         case CAM_REQ_TERMIO:
1975         case CAM_UNREC_HBA_ERROR:
1976         case CAM_REQ_TOO_BIG:
1977                 new_status = DID_ERROR;
1978                 break;
1979         case CAM_REQUEUE_REQ:
1980                 new_status = DID_REQUEUE;
1981                 break;
1982         default:
1983                 /* We should never get here */
1984                 new_status = DID_ERROR;
1985                 break;
1986         }
1987
1988         if (do_fallback) {
1989                 printf("%s: device overrun (status %x) on %d:%d:%d\n",
1990                        ahd_name(ahd), status, cmd->device->channel,
1991                        cmd->device->id, cmd->device->lun);
1992         }
1993
1994         ahd_cmd_set_transaction_status(cmd, new_status);
1995
1996         cmd->scsi_done(cmd);
1997 }
1998
1999 static void
2000 ahd_freeze_simq(struct ahd_softc *ahd)
2001 {
2002         scsi_block_requests(ahd->platform_data->host);
2003 }
2004
2005 static void
2006 ahd_release_simq(struct ahd_softc *ahd)
2007 {
2008         scsi_unblock_requests(ahd->platform_data->host);
2009 }
2010
2011 static int
2012 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2013 {
2014         struct ahd_softc *ahd;
2015         struct ahd_linux_device *dev;
2016         struct scb *pending_scb;
2017         u_int  saved_scbptr;
2018         u_int  active_scbptr;
2019         u_int  last_phase;
2020         u_int  saved_scsiid;
2021         u_int  cdb_byte;
2022         int    retval;
2023         int    was_paused;
2024         int    paused;
2025         int    wait;
2026         int    disconnected;
2027         ahd_mode_state saved_modes;
2028         unsigned long flags;
2029
2030         pending_scb = NULL;
2031         paused = FALSE;
2032         wait = FALSE;
2033         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2034
2035         scmd_printk(KERN_INFO, cmd,
2036                     "Attempting to queue an ABORT message:");
2037
2038         printf("CDB:");
2039         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2040                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2041         printf("\n");
2042
2043         ahd_lock(ahd, &flags);
2044
2045         /*
2046          * First determine if we currently own this command.
2047          * Start by searching the device queue.  If not found
2048          * there, check the pending_scb list.  If not found
2049          * at all, and the system wanted us to just abort the
2050          * command, return success.
2051          */
2052         dev = scsi_transport_device_data(cmd->device);
2053
2054         if (dev == NULL) {
2055                 /*
2056                  * No target device for this command exists,
2057                  * so we must not still own the command.
2058                  */
2059                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2060                 retval = SUCCESS;
2061                 goto no_cmd;
2062         }
2063
2064         /*
2065          * See if we can find a matching cmd in the pending list.
2066          */
2067         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2068                 if (pending_scb->io_ctx == cmd)
2069                         break;
2070         }
2071
2072         if (pending_scb == NULL) {
2073                 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2074                 goto no_cmd;
2075         }
2076
2077         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2078                 /*
2079                  * We can't queue two recovery actions using the same SCB
2080                  */
2081                 retval = FAILED;
2082                 goto  done;
2083         }
2084
2085         /*
2086          * Ensure that the card doesn't do anything
2087          * behind our back.  Also make sure that we
2088          * didn't "just" miss an interrupt that would
2089          * affect this cmd.
2090          */
2091         was_paused = ahd_is_paused(ahd);
2092         ahd_pause_and_flushwork(ahd);
2093         paused = TRUE;
2094
2095         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2096                 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2097                 goto no_cmd;
2098         }
2099
2100         printf("%s: At time of recovery, card was %spaused\n",
2101                ahd_name(ahd), was_paused ? "" : "not ");
2102         ahd_dump_card_state(ahd);
2103
2104         disconnected = TRUE;
2105         if (ahd_search_qinfifo(ahd, cmd->device->id,
2106                                cmd->device->channel + 'A',
2107                                cmd->device->lun,
2108                                pending_scb->hscb->tag,
2109                                ROLE_INITIATOR, CAM_REQ_ABORTED,
2110                                SEARCH_COMPLETE) > 0) {
2111                 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2112                        ahd_name(ahd), cmd->device->channel,
2113                        cmd->device->id, cmd->device->lun);
2114                 retval = SUCCESS;
2115                 goto done;
2116         }
2117
2118         saved_modes = ahd_save_modes(ahd);
2119         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2120         last_phase = ahd_inb(ahd, LASTPHASE);
2121         saved_scbptr = ahd_get_scbptr(ahd);
2122         active_scbptr = saved_scbptr;
2123         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2124                 struct scb *bus_scb;
2125
2126                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2127                 if (bus_scb == pending_scb)
2128                         disconnected = FALSE;
2129         }
2130
2131         /*
2132          * At this point, pending_scb is the scb associated with the
2133          * passed in command.  That command is currently active on the
2134          * bus or is in the disconnected state.
2135          */
2136         saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2137         if (last_phase != P_BUSFREE
2138             && SCB_GET_TAG(pending_scb) == active_scbptr) {
2139
2140                 /*
2141                  * We're active on the bus, so assert ATN
2142                  * and hope that the target responds.
2143                  */
2144                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2145                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2146                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2147                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2148                 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2149                 wait = TRUE;
2150         } else if (disconnected) {
2151
2152                 /*
2153                  * Actually re-queue this SCB in an attempt
2154                  * to select the device before it reconnects.
2155                  */
2156                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2157                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2158                 pending_scb->hscb->cdb_len = 0;
2159                 pending_scb->hscb->task_attribute = 0;
2160                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2161
2162                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2163                         /*
2164                          * Mark the SCB has having an outstanding
2165                          * task management function.  Should the command
2166                          * complete normally before the task management
2167                          * function can be sent, the host will be notified
2168                          * to abort our requeued SCB.
2169                          */
2170                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2171                                  pending_scb->hscb->task_management);
2172                 } else {
2173                         /*
2174                          * If non-packetized, set the MK_MESSAGE control
2175                          * bit indicating that we desire to send a message.
2176                          * We also set the disconnected flag since there is
2177                          * no guarantee that our SCB control byte matches
2178                          * the version on the card.  We don't want the
2179                          * sequencer to abort the command thinking an
2180                          * unsolicited reselection occurred.
2181                          */
2182                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2183
2184                         /*
2185                          * The sequencer will never re-reference the
2186                          * in-core SCB.  To make sure we are notified
2187                          * during reslection, set the MK_MESSAGE flag in
2188                          * the card's copy of the SCB.
2189                          */
2190                         ahd_outb(ahd, SCB_CONTROL,
2191                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2192                 }
2193
2194                 /*
2195                  * Clear out any entries in the QINFIFO first
2196                  * so we are the next SCB for this target
2197                  * to run.
2198                  */
2199                 ahd_search_qinfifo(ahd, cmd->device->id,
2200                                    cmd->device->channel + 'A', cmd->device->lun,
2201                                    SCB_LIST_NULL, ROLE_INITIATOR,
2202                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2203                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2204                 ahd_set_scbptr(ahd, saved_scbptr);
2205                 ahd_print_path(ahd, pending_scb);
2206                 printf("Device is disconnected, re-queuing SCB\n");
2207                 wait = TRUE;
2208         } else {
2209                 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2210                 retval = FAILED;
2211                 goto done;
2212         }
2213
2214 no_cmd:
2215         /*
2216          * Our assumption is that if we don't have the command, no
2217          * recovery action was required, so we return success.  Again,
2218          * the semantics of the mid-layer recovery engine are not
2219          * well defined, so this may change in time.
2220          */
2221         retval = SUCCESS;
2222 done:
2223         if (paused)
2224                 ahd_unpause(ahd);
2225         if (wait) {
2226                 DECLARE_COMPLETION_ONSTACK(done);
2227
2228                 ahd->platform_data->eh_done = &done;
2229                 ahd_unlock(ahd, &flags);
2230
2231                 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2232                 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2233                         ahd_lock(ahd, &flags);
2234                         ahd->platform_data->eh_done = NULL;
2235                         ahd_unlock(ahd, &flags);
2236                         printf("%s: Timer Expired (active %d)\n",
2237                                ahd_name(ahd), dev->active);
2238                         retval = FAILED;
2239                 }
2240                 printf("Recovery code awake\n");
2241         } else
2242                 ahd_unlock(ahd, &flags);
2243
2244         if (retval != SUCCESS)
2245                 printf("%s: Command abort returning 0x%x\n",
2246                        ahd_name(ahd), retval);
2247
2248         return retval;
2249 }
2250
2251 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2252 {
2253         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2254         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2255         struct ahd_devinfo devinfo;
2256         unsigned long flags;
2257
2258         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2259                             starget->channel + 'A', ROLE_INITIATOR);
2260         ahd_lock(ahd, &flags);
2261         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2262         ahd_unlock(ahd, &flags);
2263 }
2264
2265 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2266 {
2267         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2268         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2269         struct ahd_tmode_tstate *tstate;
2270         struct ahd_initiator_tinfo *tinfo
2271                 = ahd_fetch_transinfo(ahd,
2272                                       starget->channel + 'A',
2273                                       shost->this_id, starget->id, &tstate);
2274         struct ahd_devinfo devinfo;
2275         unsigned int ppr_options = tinfo->goal.ppr_options;
2276         unsigned int dt;
2277         unsigned long flags;
2278         unsigned long offset = tinfo->goal.offset;
2279
2280 #ifdef AHD_DEBUG
2281         if ((ahd_debug & AHD_SHOW_DV) != 0)
2282                 printf("%s: set period to %d\n", ahd_name(ahd), period);
2283 #endif
2284         if (offset == 0)
2285                 offset = MAX_OFFSET;
2286
2287         if (period < 8)
2288                 period = 8;
2289         if (period < 10) {
2290                 if (spi_max_width(starget)) {
2291                         ppr_options |= MSG_EXT_PPR_DT_REQ;
2292                         if (period == 8)
2293                                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2294                 } else
2295                         period = 10;
2296         }
2297
2298         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2299
2300         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2301                             starget->channel + 'A', ROLE_INITIATOR);
2302
2303         /* all PPR requests apart from QAS require wide transfers */
2304         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2305                 if (spi_width(starget) == 0)
2306                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2307         }
2308
2309         ahd_find_syncrate(ahd, &period, &ppr_options,
2310                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2311
2312         ahd_lock(ahd, &flags);
2313         ahd_set_syncrate(ahd, &devinfo, period, offset,
2314                          ppr_options, AHD_TRANS_GOAL, FALSE);
2315         ahd_unlock(ahd, &flags);
2316 }
2317
2318 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2319 {
2320         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2321         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2322         struct ahd_tmode_tstate *tstate;
2323         struct ahd_initiator_tinfo *tinfo
2324                 = ahd_fetch_transinfo(ahd,
2325                                       starget->channel + 'A',
2326                                       shost->this_id, starget->id, &tstate);
2327         struct ahd_devinfo devinfo;
2328         unsigned int ppr_options = 0;
2329         unsigned int period = 0;
2330         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2331         unsigned long flags;
2332
2333 #ifdef AHD_DEBUG
2334         if ((ahd_debug & AHD_SHOW_DV) != 0)
2335                 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2336 #endif
2337
2338         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2339                             starget->channel + 'A', ROLE_INITIATOR);
2340         if (offset != 0) {
2341                 period = tinfo->goal.period;
2342                 ppr_options = tinfo->goal.ppr_options;
2343                 ahd_find_syncrate(ahd, &period, &ppr_options,
2344                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2345         }
2346
2347         ahd_lock(ahd, &flags);
2348         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2349                          AHD_TRANS_GOAL, FALSE);
2350         ahd_unlock(ahd, &flags);
2351 }
2352
2353 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2354 {
2355         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2356         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2357         struct ahd_tmode_tstate *tstate;
2358         struct ahd_initiator_tinfo *tinfo
2359                 = ahd_fetch_transinfo(ahd,
2360                                       starget->channel + 'A',
2361                                       shost->this_id, starget->id, &tstate);
2362         struct ahd_devinfo devinfo;
2363         unsigned int ppr_options = tinfo->goal.ppr_options
2364                 & ~MSG_EXT_PPR_DT_REQ;
2365         unsigned int period = tinfo->goal.period;
2366         unsigned int width = tinfo->goal.width;
2367         unsigned long flags;
2368
2369 #ifdef AHD_DEBUG
2370         if ((ahd_debug & AHD_SHOW_DV) != 0)
2371                 printf("%s: %s DT\n", ahd_name(ahd),
2372                        dt ? "enabling" : "disabling");
2373 #endif
2374         if (dt && spi_max_width(starget)) {
2375                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2376                 if (!width)
2377                         ahd_linux_set_width(starget, 1);
2378         } else {
2379                 if (period <= 9)
2380                         period = 10; /* If resetting DT, period must be >= 25ns */
2381                 /* IU is invalid without DT set */
2382                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2383         }
2384         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2385                             starget->channel + 'A', ROLE_INITIATOR);
2386         ahd_find_syncrate(ahd, &period, &ppr_options,
2387                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2388
2389         ahd_lock(ahd, &flags);
2390         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2391                          ppr_options, AHD_TRANS_GOAL, FALSE);
2392         ahd_unlock(ahd, &flags);
2393 }
2394
2395 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2396 {
2397         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2398         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2399         struct ahd_tmode_tstate *tstate;
2400         struct ahd_initiator_tinfo *tinfo
2401                 = ahd_fetch_transinfo(ahd,
2402                                       starget->channel + 'A',
2403                                       shost->this_id, starget->id, &tstate);
2404         struct ahd_devinfo devinfo;
2405         unsigned int ppr_options = tinfo->goal.ppr_options
2406                 & ~MSG_EXT_PPR_QAS_REQ;
2407         unsigned int period = tinfo->goal.period;
2408         unsigned int dt;
2409         unsigned long flags;
2410
2411 #ifdef AHD_DEBUG
2412         if ((ahd_debug & AHD_SHOW_DV) != 0)
2413                 printf("%s: %s QAS\n", ahd_name(ahd),
2414                        qas ? "enabling" : "disabling");
2415 #endif
2416
2417         if (qas) {
2418                 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2419         }
2420
2421         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2422
2423         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2424                             starget->channel + 'A', ROLE_INITIATOR);
2425         ahd_find_syncrate(ahd, &period, &ppr_options,
2426                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2427
2428         ahd_lock(ahd, &flags);
2429         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2430                          ppr_options, AHD_TRANS_GOAL, FALSE);
2431         ahd_unlock(ahd, &flags);
2432 }
2433
2434 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2435 {
2436         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2437         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2438         struct ahd_tmode_tstate *tstate;
2439         struct ahd_initiator_tinfo *tinfo
2440                 = ahd_fetch_transinfo(ahd,
2441                                       starget->channel + 'A',
2442                                       shost->this_id, starget->id, &tstate);
2443         struct ahd_devinfo devinfo;
2444         unsigned int ppr_options = tinfo->goal.ppr_options
2445                 & ~MSG_EXT_PPR_IU_REQ;
2446         unsigned int period = tinfo->goal.period;
2447         unsigned int dt;
2448         unsigned long flags;
2449
2450 #ifdef AHD_DEBUG
2451         if ((ahd_debug & AHD_SHOW_DV) != 0)
2452                 printf("%s: %s IU\n", ahd_name(ahd),
2453                        iu ? "enabling" : "disabling");
2454 #endif
2455
2456         if (iu && spi_max_width(starget)) {
2457                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2458                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2459         }
2460
2461         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2462
2463         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2464                             starget->channel + 'A', ROLE_INITIATOR);
2465         ahd_find_syncrate(ahd, &period, &ppr_options,
2466                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2467
2468         ahd_lock(ahd, &flags);
2469         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2470                          ppr_options, AHD_TRANS_GOAL, FALSE);
2471         ahd_unlock(ahd, &flags);
2472 }
2473
2474 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2475 {
2476         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2477         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2478         struct ahd_tmode_tstate *tstate;
2479         struct ahd_initiator_tinfo *tinfo
2480                 = ahd_fetch_transinfo(ahd,
2481                                       starget->channel + 'A',
2482                                       shost->this_id, starget->id, &tstate);
2483         struct ahd_devinfo devinfo;
2484         unsigned int ppr_options = tinfo->goal.ppr_options
2485                 & ~MSG_EXT_PPR_RD_STRM;
2486         unsigned int period = tinfo->goal.period;
2487         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2488         unsigned long flags;
2489
2490 #ifdef AHD_DEBUG
2491         if ((ahd_debug & AHD_SHOW_DV) != 0)
2492                 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2493                        rdstrm  ? "enabling" : "disabling");
2494 #endif
2495
2496         if (rdstrm && spi_max_width(starget))
2497                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2498
2499         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2500                             starget->channel + 'A', ROLE_INITIATOR);
2501         ahd_find_syncrate(ahd, &period, &ppr_options,
2502                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2503
2504         ahd_lock(ahd, &flags);
2505         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2506                          ppr_options, AHD_TRANS_GOAL, FALSE);
2507         ahd_unlock(ahd, &flags);
2508 }
2509
2510 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2511 {
2512         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2513         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2514         struct ahd_tmode_tstate *tstate;
2515         struct ahd_initiator_tinfo *tinfo
2516                 = ahd_fetch_transinfo(ahd,
2517                                       starget->channel + 'A',
2518                                       shost->this_id, starget->id, &tstate);
2519         struct ahd_devinfo devinfo;
2520         unsigned int ppr_options = tinfo->goal.ppr_options
2521                 & ~MSG_EXT_PPR_WR_FLOW;
2522         unsigned int period = tinfo->goal.period;
2523         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2524         unsigned long flags;
2525
2526 #ifdef AHD_DEBUG
2527         if ((ahd_debug & AHD_SHOW_DV) != 0)
2528                 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2529                        wrflow ? "enabling" : "disabling");
2530 #endif
2531
2532         if (wrflow && spi_max_width(starget))
2533                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2534
2535         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2536                             starget->channel + 'A', ROLE_INITIATOR);
2537         ahd_find_syncrate(ahd, &period, &ppr_options,
2538                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2539
2540         ahd_lock(ahd, &flags);
2541         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2542                          ppr_options, AHD_TRANS_GOAL, FALSE);
2543         ahd_unlock(ahd, &flags);
2544 }
2545
2546 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2547 {
2548         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2549         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2550         struct ahd_tmode_tstate *tstate;
2551         struct ahd_initiator_tinfo *tinfo
2552                 = ahd_fetch_transinfo(ahd,
2553                                       starget->channel + 'A',
2554                                       shost->this_id, starget->id, &tstate);
2555         struct ahd_devinfo devinfo;
2556         unsigned int ppr_options = tinfo->goal.ppr_options
2557                 & ~MSG_EXT_PPR_RTI;
2558         unsigned int period = tinfo->goal.period;
2559         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2560         unsigned long flags;
2561
2562         if ((ahd->features & AHD_RTI) == 0) {
2563 #ifdef AHD_DEBUG
2564                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2565                         printf("%s: RTI not available\n", ahd_name(ahd));
2566 #endif
2567                 return;
2568         }
2569
2570 #ifdef AHD_DEBUG
2571         if ((ahd_debug & AHD_SHOW_DV) != 0)
2572                 printf("%s: %s RTI\n", ahd_name(ahd),
2573                        rti ? "enabling" : "disabling");
2574 #endif
2575
2576         if (rti && spi_max_width(starget))
2577                 ppr_options |= MSG_EXT_PPR_RTI;
2578
2579         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2580                             starget->channel + 'A', ROLE_INITIATOR);
2581         ahd_find_syncrate(ahd, &period, &ppr_options,
2582                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2583
2584         ahd_lock(ahd, &flags);
2585         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2586                          ppr_options, AHD_TRANS_GOAL, FALSE);
2587         ahd_unlock(ahd, &flags);
2588 }
2589
2590 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2591 {
2592         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2593         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2594         struct ahd_tmode_tstate *tstate;
2595         struct ahd_initiator_tinfo *tinfo
2596                 = ahd_fetch_transinfo(ahd,
2597                                       starget->channel + 'A',
2598                                       shost->this_id, starget->id, &tstate);
2599         struct ahd_devinfo devinfo;
2600         unsigned int ppr_options = tinfo->goal.ppr_options
2601                 & ~MSG_EXT_PPR_PCOMP_EN;
2602         unsigned int period = tinfo->goal.period;
2603         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2604         unsigned long flags;
2605
2606 #ifdef AHD_DEBUG
2607         if ((ahd_debug & AHD_SHOW_DV) != 0)
2608                 printf("%s: %s Precompensation\n", ahd_name(ahd),
2609                        pcomp ? "Enable" : "Disable");
2610 #endif
2611
2612         if (pcomp && spi_max_width(starget)) {
2613                 uint8_t precomp;
2614
2615                 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2616                         struct ahd_linux_iocell_opts *iocell_opts;
2617
2618                         iocell_opts = &aic79xx_iocell_info[ahd->unit];
2619                         precomp = iocell_opts->precomp;
2620                 } else {
2621                         precomp = AIC79XX_DEFAULT_PRECOMP;
2622                 }
2623                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2624                 AHD_SET_PRECOMP(ahd, precomp);
2625         } else {
2626                 AHD_SET_PRECOMP(ahd, 0);
2627         }
2628
2629         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2630                             starget->channel + 'A', ROLE_INITIATOR);
2631         ahd_find_syncrate(ahd, &period, &ppr_options,
2632                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2633
2634         ahd_lock(ahd, &flags);
2635         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2636                          ppr_options, AHD_TRANS_GOAL, FALSE);
2637         ahd_unlock(ahd, &flags);
2638 }
2639
2640 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2641 {
2642         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2643         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2644         struct ahd_tmode_tstate *tstate;
2645         struct ahd_initiator_tinfo *tinfo
2646                 = ahd_fetch_transinfo(ahd,
2647                                       starget->channel + 'A',
2648                                       shost->this_id, starget->id, &tstate);
2649         struct ahd_devinfo devinfo;
2650         unsigned int ppr_options = tinfo->goal.ppr_options
2651                 & ~MSG_EXT_PPR_HOLD_MCS;
2652         unsigned int period = tinfo->goal.period;
2653         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2654         unsigned long flags;
2655
2656         if (hold && spi_max_width(starget))
2657                 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2658
2659         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2660                             starget->channel + 'A', ROLE_INITIATOR);
2661         ahd_find_syncrate(ahd, &period, &ppr_options,
2662                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2663
2664         ahd_lock(ahd, &flags);
2665         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2666                          ppr_options, AHD_TRANS_GOAL, FALSE);
2667         ahd_unlock(ahd, &flags);
2668 }
2669
2670 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2671 {
2672         struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2673         unsigned long flags;
2674         u8 mode;
2675
2676         ahd_lock(ahd, &flags);
2677         ahd_pause(ahd);
2678         mode = ahd_inb(ahd, SBLKCTL);
2679         ahd_unpause(ahd);
2680         ahd_unlock(ahd, &flags);
2681
2682         if (mode & ENAB40)
2683                 spi_signalling(shost) = SPI_SIGNAL_LVD;
2684         else if (mode & ENAB20)
2685                 spi_signalling(shost) = SPI_SIGNAL_SE;
2686         else
2687                 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2688 }
2689
2690 static struct spi_function_template ahd_linux_transport_functions = {
2691         .set_offset     = ahd_linux_set_offset,
2692         .show_offset    = 1,
2693         .set_period     = ahd_linux_set_period,
2694         .show_period    = 1,
2695         .set_width      = ahd_linux_set_width,
2696         .show_width     = 1,
2697         .set_dt         = ahd_linux_set_dt,
2698         .show_dt        = 1,
2699         .set_iu         = ahd_linux_set_iu,
2700         .show_iu        = 1,
2701         .set_qas        = ahd_linux_set_qas,
2702         .show_qas       = 1,
2703         .set_rd_strm    = ahd_linux_set_rd_strm,
2704         .show_rd_strm   = 1,
2705         .set_wr_flow    = ahd_linux_set_wr_flow,
2706         .show_wr_flow   = 1,
2707         .set_rti        = ahd_linux_set_rti,
2708         .show_rti       = 1,
2709         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2710         .show_pcomp_en  = 1,
2711         .set_hold_mcs   = ahd_linux_set_hold_mcs,
2712         .show_hold_mcs  = 1,
2713         .get_signalling = ahd_linux_get_signalling,
2714 };
2715
2716 static int __init
2717 ahd_linux_init(void)
2718 {
2719         int     error = 0;
2720
2721         /*
2722          * If we've been passed any parameters, process them now.
2723          */
2724         if (aic79xx)
2725                 aic79xx_setup(aic79xx);
2726
2727         ahd_linux_transport_template =
2728                 spi_attach_transport(&ahd_linux_transport_functions);
2729         if (!ahd_linux_transport_template)
2730                 return -ENODEV;
2731
2732         scsi_transport_reserve_device(ahd_linux_transport_template,
2733                                       sizeof(struct ahd_linux_device));
2734
2735         error = ahd_linux_pci_init();
2736         if (error)
2737                 spi_release_transport(ahd_linux_transport_template);
2738         return error;
2739 }
2740
2741 static void __exit
2742 ahd_linux_exit(void)
2743 {
2744         ahd_linux_pci_exit();
2745         spi_release_transport(ahd_linux_transport_template);
2746 }
2747
2748 module_init(ahd_linux_init);
2749 module_exit(ahd_linux_exit);