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  * Certain PCI motherboards will scan PCI devices from highest to lowest,
 247  * others scan from lowest to highest, and they tend to do all kinds of
 248  * strange things when they come into contact with PCI bridge chips.  The
 249  * net result of all this is that the PCI card that is actually used to boot
 250  * the machine is very hard to detect.  Most motherboards go from lowest
 251  * PCI slot number to highest, and the first SCSI controller found is the
 252  * one you boot from.  The only exceptions to this are when a controller
 253  * has its BIOS disabled.  So, we by default sort all of our SCSI controllers
 254  * from lowest PCI slot number to highest PCI slot number.  We also force
 255  * all controllers with their BIOS disabled to the end of the list.  This
 256  * works on *almost* all computers.  Where it doesn't work, we have this
 257  * option.  Setting this option to non-0 will reverse the order of the sort
 258  * to highest first, then lowest, but will still leave cards with their BIOS
 259  * disabled at the very end.  That should fix everyone up unless there are
 260  * really strange cirumstances.
 261  */
 262 static uint32_t aic79xx_reverse_scan;
 263
 264 /*
 265  * Should we force EXTENDED translation on a controller.
 266  *     0 == Use whatever is in the SEEPROM or default to off
 267  *     1 == Use whatever is in the SEEPROM or default to on
 268  */
 269 static uint32_t aic79xx_extended;
 270
 271 /*
 272  * PCI bus parity checking of the Adaptec controllers.  This is somewhat
 273  * dubious at best.  To my knowledge, this option has never actually
 274  * solved a PCI parity problem, but on certain machines with broken PCI
 275  * chipset configurations, it can generate tons of false error messages.
 276  * It's included in the driver for completeness.
 277  *   0     = Shut off PCI parity check
 278  *   non-0 = Enable PCI parity check
 279  *
 280  * NOTE: you can't actually pass -1 on the lilo prompt.  So, to set this
 281  * variable to -1 you would actually want to simply pass the variable
 282  * name without a number.  That will invert the 0 which will result in
 283  * -1.
 284  */
 285 static uint32_t aic79xx_pci_parity = ~0;
 286
 287 /*
 288  * There are lots of broken chipsets in the world.  Some of them will
 289  * violate the PCI spec when we issue byte sized memory writes to our
 290  * controller.  I/O mapped register access, if allowed by the given
 291  * platform, will work in almost all cases.
 292  */
 293 uint32_t aic79xx_allow_memio = ~0;
 294
 295 /*
 296  * So that we can set how long each device is given as a selection timeout.
 297  * The table of values goes like this:
 298  *   0 - 256ms
 299  *   1 - 128ms
 300  *   2 - 64ms
 301  *   3 - 32ms
 302  * We default to 256ms because some older devices need a longer time
 303  * to respond to initial selection.
 304  */
 305 static uint32_t aic79xx_seltime;
 306
 307 /*
 308  * Certain devices do not perform any aging on commands.  Should the
 309  * device be saturated by commands in one portion of the disk, it is
 310  * possible for transactions on far away sectors to never be serviced.
 311  * To handle these devices, we can periodically send an ordered tag to
 312  * force all outstanding transactions to be serviced prior to a new
 313  * transaction.
 314  */
 315 uint32_t aic79xx_periodic_otag;
 316
 317 /* Some storage boxes are using an LSI chip which has a bug making it
 318  * impossible to use aic79xx Rev B chip in 320 speeds.  The following
 319  * storage boxes have been reported to be buggy:
 320  * EonStor 3U 16-Bay: U16U-G3A3
 321  * EonStor 2U 12-Bay: U12U-G3A3
 322  * SentinelRAID: 2500F R5 / R6
 323  * SentinelRAID: 2500F R1
 324  * SentinelRAID: 2500F/1500F
 325  * SentinelRAID: 150F
 326  *
 327  * To get around this LSI bug, you can set your board to 160 mode
 328  * or you can enable the SLOWCRC bit.
 329  */
 330 uint32_t aic79xx_slowcrc;
 331
 332 /*
 333  * Module information and settable options.
 334  */
 335 static char *aic79xx = NULL;
 336
 337 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
 338 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
 339 MODULE_LICENSE("Dual BSD/GPL");
 340 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
 341 module_param(aic79xx, charp, 0444);
 342 MODULE_PARM_DESC(aic79xx,
 343 "period delimited, options string.\n"
 344 "       verbose                 Enable verbose/diagnostic logging\n"
 345 "       allow_memio             Allow device registers to be memory mapped\n"
 346 "       debug                   Bitmask of debug values to enable\n"
 347 "       no_reset                Supress initial bus resets\n"
 348 "       extended                Enable extended geometry on all controllers\n"
 349 "       periodic_otag           Send an ordered tagged transaction\n"
 350 "                               periodically to prevent tag starvation.\n"
 351 "                               This may be required by some older disk\n"
 352 "                               or drives/RAID arrays.\n"
 353 "       reverse_scan            Sort PCI devices highest Bus/Slot to lowest\n"
 354 "       tag_info:<tag_str>      Set per-target tag depth\n"
 355 "       global_tag_depth:<int>  Global tag depth for all targets on all buses\n"
 356 "       slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
 357 "       precomp:<pcomp_list>    Set the signal precompensation (0-7).\n"
 358 "       amplitude:<int>         Set the signal amplitude (0-7).\n"
 359 "       seltime:<int>           Selection Timeout:\n"
 360 "                               (0/256ms,1/128ms,2/64ms,3/32ms)\n"
 361 "       slowcrc                 Turn on the SLOWCRC bit (Rev B only)\n"
 362 "\n"
 363 "       Sample /etc/modprobe.conf line:\n"
 364 "               Enable verbose logging\n"
 365 "               Set tag depth on Controller 2/Target 2 to 10 tags\n"
 366 "               Shorten the selection timeout to 128ms\n"
 367 "\n"
 368 "       options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
 369 "\n");
 370
 371 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
 372                                          struct scsi_device *,
 373                                          struct scb *);
 374 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
 375                                          struct scsi_cmnd *cmd);
 376 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
 377 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
 378 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
 379                                      struct ahd_devinfo *devinfo);
 380 static void ahd_linux_device_queue_depth(struct scsi_device *);
 381 static int ahd_linux_run_command(struct ahd_softc*,
 382                                  struct ahd_linux_device *,
 383                                  struct scsi_cmnd *);
 384 static void ahd_linux_setup_tag_info_global(char *p);
 385 static int  aic79xx_setup(char *c);
 386
 387 static int ahd_linux_unit;
 388
 389
 390 /****************************** Inlines ***************************************/
 391 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
 392
 393 static __inline void
 394 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
 395 {
 396         struct scsi_cmnd *cmd;
 397         int direction;
 398
 399         cmd = scb->io_ctx;
 400         direction = cmd->sc_data_direction;
 401         ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
 402         if (cmd->use_sg != 0) {
 403                 struct scatterlist *sg;
 404
 405                 sg = (struct scatterlist *)cmd->request_buffer;
 406                 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
 407         } else if (cmd->request_bufflen != 0) {
 408                 pci_unmap_single(ahd->dev_softc,
 409                                  scb->platform_data->buf_busaddr,
 410                                  cmd->request_bufflen, direction);
 411         }
 412 }
 413
 414 /******************************** Macros **************************************/
 415 #define BUILD_SCSIID(ahd, cmd)                                          \
 416         (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
 417
 418 /*
 419  * Return a string describing the driver.
 420  */
 421 static const char *
 422 ahd_linux_info(struct Scsi_Host *host)
 423 {
 424         static char buffer[512];
 425         char    ahd_info[256];
 426         char   *bp;
 427         struct ahd_softc *ahd;
 428
 429         bp = &buffer[0];
 430         ahd = *(struct ahd_softc **)host->hostdata;
 431         memset(bp, 0, sizeof(buffer));
 432         strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
 433         strcat(bp, AIC79XX_DRIVER_VERSION);
 434         strcat(bp, "\n");
 435         strcat(bp, "        <");
 436         strcat(bp, ahd->description);
 437         strcat(bp, ">\n");
 438         strcat(bp, "        ");
 439         ahd_controller_info(ahd, ahd_info);
 440         strcat(bp, ahd_info);
 441         strcat(bp, "\n");
 442
 443         return (bp);
 444 }
 445
 446 /*
 447  * Queue an SCB to the controller.
 448  */
 449 static int
 450 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 451 {
 452         struct   ahd_softc *ahd;
 453         struct   ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
 454         int rtn = SCSI_MLQUEUE_HOST_BUSY;
 455
 456         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 457
 458         cmd->scsi_done = scsi_done;
 459         cmd->result = CAM_REQ_INPROG << 16;
 460         rtn = ahd_linux_run_command(ahd, dev, cmd);
 461
 462         return rtn;
 463 }
 464
 465 static inline struct scsi_target **
 466 ahd_linux_target_in_softc(struct scsi_target *starget)
 467 {
 468         struct  ahd_softc *ahd =
 469                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 470         unsigned int target_offset;
 471
 472         target_offset = starget->id;
 473         if (starget->channel != 0)
 474                 target_offset += 8;
 475
 476         return &ahd->platform_data->starget[target_offset];
 477 }
 478
 479 static int
 480 ahd_linux_target_alloc(struct scsi_target *starget)
 481 {
 482         struct  ahd_softc *ahd =
 483                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 484         struct seeprom_config *sc = ahd->seep_config;
 485         unsigned long flags;
 486         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 487         struct ahd_linux_target *targ = scsi_transport_target_data(starget);
 488         struct ahd_devinfo devinfo;
 489         struct ahd_initiator_tinfo *tinfo;
 490         struct ahd_tmode_tstate *tstate;
 491         char channel = starget->channel + 'A';
 492
 493         ahd_lock(ahd, &flags);
 494
 495         BUG_ON(*ahd_targp != NULL);
 496
 497         *ahd_targp = starget;
 498         memset(targ, 0, sizeof(*targ));
 499
 500         if (sc) {
 501                 int flags = sc->device_flags[starget->id];
 502
 503                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 504                                             starget->id, &tstate);
 505
 506                 if ((flags  & CFPACKETIZED) == 0) {
 507                         /* Do not negotiate packetized transfers */
 508                         spi_rd_strm(starget) = 0;
 509                         spi_pcomp_en(starget) = 0;
 510                         spi_rti(starget) = 0;
 511                         spi_wr_flow(starget) = 0;
 512                         spi_hold_mcs(starget) = 0;
 513                 } else {
 514                         if ((ahd->features & AHD_RTI) == 0)
 515                                 spi_rti(starget) = 0;
 516                 }
 517
 518                 if ((flags & CFQAS) == 0)
 519                         spi_qas(starget) = 0;
 520
 521                 /* Transinfo values have been set to BIOS settings */
 522                 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
 523                 spi_min_period(starget) = tinfo->user.period;
 524                 spi_max_offset(starget) = tinfo->user.offset;
 525         }
 526
 527         tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
 528                                     starget->id, &tstate);
 529         ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
 530                             CAM_LUN_WILDCARD, channel,
 531                             ROLE_INITIATOR);
 532         ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
 533                          AHD_TRANS_GOAL, /*paused*/FALSE);
 534         ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
 535                       AHD_TRANS_GOAL, /*paused*/FALSE);
 536         ahd_unlock(ahd, &flags);
 537
 538         return 0;
 539 }
 540
 541 static void
 542 ahd_linux_target_destroy(struct scsi_target *starget)
 543 {
 544         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 545
 546         *ahd_targp = NULL;
 547 }
 548
 549 static int
 550 ahd_linux_slave_alloc(struct scsi_device *sdev)
 551 {
 552         struct  ahd_softc *ahd =
 553                 *((struct ahd_softc **)sdev->host->hostdata);
 554         struct scsi_target *starget = sdev->sdev_target;
 555         struct ahd_linux_target *targ = scsi_transport_target_data(starget);
 556         struct ahd_linux_device *dev;
 557
 558         if (bootverbose)
 559                 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
 560
 561         BUG_ON(targ->sdev[sdev->lun] != NULL);
 562
 563         dev = scsi_transport_device_data(sdev);
 564         memset(dev, 0, sizeof(*dev));
 565
 566         /*
 567          * We start out life using untagged
 568          * transactions of which we allow one.
 569          */
 570         dev->openings = 1;
 571
 572         /*
 573          * Set maxtags to 0.  This will be changed if we
 574          * later determine that we are dealing with
 575          * a tagged queuing capable device.
 576          */
 577         dev->maxtags = 0;
 578
 579         targ->sdev[sdev->lun] = sdev;
 580
 581         return (0);
 582 }
 583
 584 static int
 585 ahd_linux_slave_configure(struct scsi_device *sdev)
 586 {
 587         struct  ahd_softc *ahd;
 588
 589         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 590         if (bootverbose)
 591                 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
 592
 593         ahd_linux_device_queue_depth(sdev);
 594
 595         /* Initial Domain Validation */
 596         if (!spi_initial_dv(sdev->sdev_target))
 597                 spi_dv_device(sdev);
 598
 599         return 0;
 600 }
 601
 602 static void
 603 ahd_linux_slave_destroy(struct scsi_device *sdev)
 604 {
 605         struct  ahd_softc *ahd;
 606         struct  ahd_linux_device *dev = scsi_transport_device_data(sdev);
 607         struct  ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
 608
 609         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 610         if (bootverbose)
 611                 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
 612
 613         BUG_ON(dev->active);
 614
 615         targ->sdev[sdev->lun] = NULL;
 616
 617 }
 618
 619 #if defined(__i386__)
 620 /*
 621  * Return the disk geometry for the given SCSI device.
 622  */
 623 static int
 624 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 625                     sector_t capacity, int geom[])
 626 {
 627         uint8_t *bh;
 628         int      heads;
 629         int      sectors;
 630         int      cylinders;
 631         int      ret;
 632         int      extended;
 633         struct   ahd_softc *ahd;
 634
 635         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 636
 637         bh = scsi_bios_ptable(bdev);
 638         if (bh) {
 639                 ret = scsi_partsize(bh, capacity,
 640                                     &geom[2], &geom[0], &geom[1]);
 641                 kfree(bh);
 642                 if (ret != -1)
 643                         return (ret);
 644         }
 645         heads = 64;
 646         sectors = 32;
 647         cylinders = aic_sector_div(capacity, heads, sectors);
 648
 649         if (aic79xx_extended != 0)
 650                 extended = 1;
 651         else
 652                 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
 653         if (extended && cylinders >= 1024) {
 654                 heads = 255;
 655                 sectors = 63;
 656                 cylinders = aic_sector_div(capacity, heads, sectors);
 657         }
 658         geom[0] = heads;
 659         geom[1] = sectors;
 660         geom[2] = cylinders;
 661         return (0);
 662 }
 663 #endif
 664
 665 /*
 666  * Abort the current SCSI command(s).
 667  */
 668 static int
 669 ahd_linux_abort(struct scsi_cmnd *cmd)
 670 {
 671         int error;
 672
 673         error = ahd_linux_queue_abort_cmd(cmd);
 674
 675         return error;
 676 }
 677
 678 /*
 679  * Attempt to send a target reset message to the device that timed out.
 680  */
 681 static int
 682 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
 683 {
 684         struct ahd_softc *ahd;
 685         struct ahd_linux_device *dev;
 686         struct scb *reset_scb;
 687         u_int  cdb_byte;
 688         int    retval = SUCCESS;
 689         int    paused;
 690         int    wait;
 691         struct  ahd_initiator_tinfo *tinfo;
 692         struct  ahd_tmode_tstate *tstate;
 693         unsigned long flags;
 694         DECLARE_COMPLETION(done);
 695
 696         reset_scb = NULL;
 697         paused = FALSE;
 698         wait = FALSE;
 699         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 700
 701         scmd_printk(KERN_INFO, cmd,
 702                     "Attempting to queue a TARGET RESET message:");
 703
 704         printf("CDB:");
 705         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
 706                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
 707         printf("\n");
 708
 709         /*
 710          * Determine if we currently own this command.
 711          */
 712         dev = scsi_transport_device_data(cmd->device);
 713
 714         if (dev == NULL) {
 715                 /*
 716                  * No target device for this command exists,
 717                  * so we must not still own the command.
 718                  */
 719                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
 720                 return SUCCESS;
 721         }
 722
 723         /*
 724          * Generate us a new SCB
 725          */
 726         reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
 727         if (!reset_scb) {
 728                 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
 729                 return FAILED;
 730         }
 731
 732         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 733                                     cmd->device->id, &tstate);
 734         reset_scb->io_ctx = cmd;
 735         reset_scb->platform_data->dev = dev;
 736         reset_scb->sg_count = 0;
 737         ahd_set_residual(reset_scb, 0);
 738         ahd_set_sense_residual(reset_scb, 0);
 739         reset_scb->platform_data->xfer_len = 0;
 740         reset_scb->hscb->control = 0;
 741         reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
 742         reset_scb->hscb->lun = cmd->device->lun;
 743         reset_scb->hscb->cdb_len = 0;
 744         reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
 745         reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
 746         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 747                 reset_scb->flags |= SCB_PACKETIZED;
 748         } else {
 749                 reset_scb->hscb->control |= MK_MESSAGE;
 750         }
 751         dev->openings--;
 752         dev->active++;
 753         dev->commands_issued++;
 754
 755         ahd_lock(ahd, &flags);
 756
 757         LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
 758         ahd_queue_scb(ahd, reset_scb);
 759
 760         ahd->platform_data->eh_done = &done;
 761         ahd_unlock(ahd, &flags);
 762
 763         printf("%s: Device reset code sleeping\n", ahd_name(ahd));
 764         if (!wait_for_completion_timeout(&done, 5 * HZ)) {
 765                 ahd_lock(ahd, &flags);
 766                 ahd->platform_data->eh_done = NULL;
 767                 ahd_unlock(ahd, &flags);
 768                 printf("%s: Device reset timer expired (active %d)\n",
 769                        ahd_name(ahd), dev->active);
 770                 retval = FAILED;
 771         }
 772         printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
 773
 774         return (retval);
 775 }
 776
 777 /*
 778  * Reset the SCSI bus.
 779  */
 780 static int
 781 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 782 {
 783         struct ahd_softc *ahd;
 784         int    found;
 785
 786         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 787 #ifdef AHD_DEBUG
 788         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 789                 printf("%s: Bus reset called for cmd %p\n",
 790                        ahd_name(ahd), cmd);
 791 #endif
 792         found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 793                                   /*initiate reset*/TRUE);
 794
 795         if (bootverbose)
 796                 printf("%s: SCSI bus reset delivered. "
 797                        "%d SCBs aborted.\n", ahd_name(ahd), found);
 798
 799         return (SUCCESS);
 800 }
 801
 802 struct scsi_host_template aic79xx_driver_template = {
 803         .module                 = THIS_MODULE,
 804         .name                   = "aic79xx",
 805         .proc_name              = "aic79xx",
 806         .proc_info              = ahd_linux_proc_info,
 807         .info                   = ahd_linux_info,
 808         .queuecommand           = ahd_linux_queue,
 809         .eh_abort_handler       = ahd_linux_abort,
 810         .eh_device_reset_handler = ahd_linux_dev_reset,
 811         .eh_bus_reset_handler   = ahd_linux_bus_reset,
 812 #if defined(__i386__)
 813         .bios_param             = ahd_linux_biosparam,
 814 #endif
 815         .can_queue              = AHD_MAX_QUEUE,
 816         .this_id                = -1,
 817         .cmd_per_lun            = 2,
 818         .use_clustering         = ENABLE_CLUSTERING,
 819         .slave_alloc            = ahd_linux_slave_alloc,
 820         .slave_configure        = ahd_linux_slave_configure,
 821         .slave_destroy          = ahd_linux_slave_destroy,
 822         .target_alloc           = ahd_linux_target_alloc,
 823         .target_destroy         = ahd_linux_target_destroy,
 824 };
 825
 826 /******************************** Bus DMA *************************************/
 827 int
 828 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
 829                    bus_size_t alignment, bus_size_t boundary,
 830                    dma_addr_t lowaddr, dma_addr_t highaddr,
 831                    bus_dma_filter_t *filter, void *filterarg,
 832                    bus_size_t maxsize, int nsegments,
 833                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
 834 {
 835         bus_dma_tag_t dmat;
 836
 837         dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
 838         if (dmat == NULL)
 839                 return (ENOMEM);
 840
 841         /*
 842          * Linux is very simplistic about DMA memory.  For now don't
 843          * maintain all specification information.  Once Linux supplies
 844          * better facilities for doing these operations, or the
 845          * needs of this particular driver change, we might need to do
 846          * more here.
 847          */
 848         dmat->alignment = alignment;
 849         dmat->boundary = boundary;
 850         dmat->maxsize = maxsize;
 851         *ret_tag = dmat;
 852         return (0);
 853 }
 854
 855 void
 856 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
 857 {
 858         free(dmat, M_DEVBUF);
 859 }
 860
 861 int
 862 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
 863                  int flags, bus_dmamap_t *mapp)
 864 {
 865         *vaddr = pci_alloc_consistent(ahd->dev_softc,
 866                                       dmat->maxsize, mapp);
 867         if (*vaddr == NULL)
 868                 return (ENOMEM);
 869         return(0);
 870 }
 871
 872 void
 873 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
 874                 void* vaddr, bus_dmamap_t map)
 875 {
 876         pci_free_consistent(ahd->dev_softc, dmat->maxsize,
 877                             vaddr, map);
 878 }
 879
 880 int
 881 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
 882                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
 883                 void *cb_arg, int flags)
 884 {
 885         /*
 886          * Assume for now that this will only be used during
 887          * initialization and not for per-transaction buffer mapping.
 888          */
 889         bus_dma_segment_t stack_sg;
 890
 891         stack_sg.ds_addr = map;
 892         stack_sg.ds_len = dmat->maxsize;
 893         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
 894         return (0);
 895 }
 896
 897 void
 898 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 899 {
 900 }
 901
 902 int
 903 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 904 {
 905         /* Nothing to do */
 906         return (0);
 907 }
 908
 909 /********************* Platform Dependent Functions ***************************/
 910 static void
 911 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
 912 {
 913
 914         if ((instance >= 0)
 915          && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
 916                 uint8_t *iocell_info;
 917
 918                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
 919                 iocell_info[index] = value & 0xFFFF;
 920                 if (bootverbose)
 921                         printf("iocell[%d:%ld] = %d\n", instance, index, value);
 922         }
 923 }
 924
 925 static void
 926 ahd_linux_setup_tag_info_global(char *p)
 927 {
 928         int tags, i, j;
 929
 930         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
 931         printf("Setting Global Tags= %d\n", tags);
 932
 933         for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
 934                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
 935                         aic79xx_tag_info[i].tag_commands[j] = tags;
 936                 }
 937         }
 938 }
 939
 940 static void
 941 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
 942 {
 943
 944         if ((instance >= 0) && (targ >= 0)
 945          && (instance < NUM_ELEMENTS(aic79xx_tag_info))
 946          && (targ < AHD_NUM_TARGETS)) {
 947                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
 948                 if (bootverbose)
 949                         printf("tag_info[%d:%d] = %d\n", instance, targ, value);
 950         }
 951 }
 952
 953 static char *
 954 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
 955                        void (*callback)(u_long, int, int, int32_t),
 956                        u_long callback_arg)
 957 {
 958         char    *tok_end;
 959         char    *tok_end2;
 960         int      i;
 961         int      instance;
 962         int      targ;
 963         int      done;
 964         char     tok_list[] = {'.', ',', '{', '}', '\0'};
 965
 966         /* All options use a ':' name/arg separator */
 967         if (*opt_arg != ':')
 968                 return (opt_arg);
 969         opt_arg++;
 970         instance = -1;
 971         targ = -1;
 972         done = FALSE;
 973         /*
 974          * Restore separator that may be in
 975          * the middle of our option argument.
 976          */
 977         tok_end = strchr(opt_arg, '\0');
 978         if (tok_end < end)
 979                 *tok_end = ',';
 980         while (!done) {
 981                 switch (*opt_arg) {
 982                 case '{':
 983                         if (instance == -1) {
 984                                 instance = 0;
 985                         } else {
 986                                 if (depth > 1) {
 987                                         if (targ == -1)
 988                                                 targ = 0;
 989                                 } else {
 990                                         printf("Malformed Option %s\n",
 991                                                opt_name);
 992                                         done = TRUE;
 993                                 }
 994                         }
 995                         opt_arg++;
 996                         break;
 997                 case '}':
 998                         if (targ != -1)
 999                                 targ = -1;
1000                         else if (instance != -1)
1001                                 instance = -1;
1002                         opt_arg++;
1003                         break;
1004                 case ',':
1005                 case '.':
1006                         if (instance == -1)
1007                                 done = TRUE;
1008                         else if (targ >= 0)
1009                                 targ++;
1010                         else if (instance >= 0)
1011                                 instance++;
1012                         opt_arg++;
1013                         break;
1014                 case '\0':
1015                         done = TRUE;
1016                         break;
1017                 default:
1018                         tok_end = end;
1019                         for (i = 0; tok_list[i]; i++) {
1020                                 tok_end2 = strchr(opt_arg, tok_list[i]);
1021                                 if ((tok_end2) && (tok_end2 < tok_end))
1022                                         tok_end = tok_end2;
1023                         }
1024                         callback(callback_arg, instance, targ,
1025                                  simple_strtol(opt_arg, NULL, 0));
1026                         opt_arg = tok_end;
1027                         break;
1028                 }
1029         }
1030         return (opt_arg);
1031 }
1032
1033 /*
1034  * Handle Linux boot parameters. This routine allows for assigning a value
1035  * to a parameter with a ':' between the parameter and the value.
1036  * ie. aic79xx=stpwlev:1,extended
1037  */
1038 static int
1039 aic79xx_setup(char *s)
1040 {
1041         int     i, n;
1042         char   *p;
1043         char   *end;
1044
1045         static struct {
1046                 const char *name;
1047                 uint32_t *flag;
1048         } options[] = {
1049                 { "extended", &aic79xx_extended },
1050                 { "no_reset", &aic79xx_no_reset },
1051                 { "verbose", &aic79xx_verbose },
1052                 { "allow_memio", &aic79xx_allow_memio},
1053 #ifdef AHD_DEBUG
1054                 { "debug", &ahd_debug },
1055 #endif
1056                 { "reverse_scan", &aic79xx_reverse_scan },
1057                 { "periodic_otag", &aic79xx_periodic_otag },
1058                 { "pci_parity", &aic79xx_pci_parity },
1059                 { "seltime", &aic79xx_seltime },
1060                 { "tag_info", NULL },
1061                 { "global_tag_depth", NULL},
1062                 { "slewrate", NULL },
1063                 { "precomp", NULL },
1064                 { "amplitude", NULL },
1065                 { "slowcrc", &aic79xx_slowcrc },
1066         };
1067
1068         end = strchr(s, '\0');
1069
1070         /*
1071          * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1072          * will never be 0 in this case.
1073          */
1074         n = 0;
1075
1076         while ((p = strsep(&s, ",.")) != NULL) {
1077                 if (*p == '\0')
1078                         continue;
1079                 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1080
1081                         n = strlen(options[i].name);
1082                         if (strncmp(options[i].name, p, n) == 0)
1083                                 break;
1084                 }
1085                 if (i == NUM_ELEMENTS(options))
1086                         continue;
1087
1088                 if (strncmp(p, "global_tag_depth", n) == 0) {
1089                         ahd_linux_setup_tag_info_global(p + n);
1090                 } else if (strncmp(p, "tag_info", n) == 0) {
1091                         s = ahd_parse_brace_option("tag_info", p + n, end,
1092                             2, ahd_linux_setup_tag_info, 0);
1093                 } else if (strncmp(p, "slewrate", n) == 0) {
1094                         s = ahd_parse_brace_option("slewrate",
1095                             p + n, end, 1, ahd_linux_setup_iocell_info,
1096                             AIC79XX_SLEWRATE_INDEX);
1097                 } else if (strncmp(p, "precomp", n) == 0) {
1098                         s = ahd_parse_brace_option("precomp",
1099                             p + n, end, 1, ahd_linux_setup_iocell_info,
1100                             AIC79XX_PRECOMP_INDEX);
1101                 } else if (strncmp(p, "amplitude", n) == 0) {
1102                         s = ahd_parse_brace_option("amplitude",
1103                             p + n, end, 1, ahd_linux_setup_iocell_info,
1104                             AIC79XX_AMPLITUDE_INDEX);
1105                 } else if (p[n] == ':') {
1106                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1107                 } else if (!strncmp(p, "verbose", n)) {
1108                         *(options[i].flag) = 1;
1109                 } else {
1110                         *(options[i].flag) ^= 0xFFFFFFFF;
1111                 }
1112         }
1113         return 1;
1114 }
1115
1116 __setup("aic79xx=", aic79xx_setup);
1117
1118 uint32_t aic79xx_verbose;
1119
1120 int
1121 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1122 {
1123         char    buf[80];
1124         struct  Scsi_Host *host;
1125         char    *new_name;
1126         u_long  s;
1127         int     retval;
1128
1129         template->name = ahd->description;
1130         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1131         if (host == NULL)
1132                 return (ENOMEM);
1133
1134         *((struct ahd_softc **)host->hostdata) = ahd;
1135         ahd->platform_data->host = host;
1136         host->can_queue = AHD_MAX_QUEUE;
1137         host->cmd_per_lun = 2;
1138         host->sg_tablesize = AHD_NSEG;
1139         host->this_id = ahd->our_id;
1140         host->irq = ahd->platform_data->irq;
1141         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1142         host->max_lun = AHD_NUM_LUNS;
1143         host->max_channel = 0;
1144         host->sg_tablesize = AHD_NSEG;
1145         ahd_lock(ahd, &s);
1146         ahd_set_unit(ahd, ahd_linux_unit++);
1147         ahd_unlock(ahd, &s);
1148         sprintf(buf, "scsi%d", host->host_no);
1149         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1150         if (new_name != NULL) {
1151                 strcpy(new_name, buf);
1152                 ahd_set_name(ahd, new_name);
1153         }
1154         host->unique_id = ahd->unit;
1155         ahd_linux_initialize_scsi_bus(ahd);
1156         ahd_intr_enable(ahd, TRUE);
1157
1158         host->transportt = ahd_linux_transport_template;
1159
1160         retval = scsi_add_host(host, &ahd->dev_softc->dev);
1161         if (retval) {
1162                 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1163                 scsi_host_put(host);
1164                 return retval;
1165         }
1166
1167         scsi_scan_host(host);
1168         return 0;
1169 }
1170
1171 uint64_t
1172 ahd_linux_get_memsize(void)
1173 {
1174         struct sysinfo si;
1175
1176         si_meminfo(&si);
1177         return ((uint64_t)si.totalram << PAGE_SHIFT);
1178 }
1179
1180 /*
1181  * Place the SCSI bus into a known state by either resetting it,
1182  * or forcing transfer negotiations on the next command to any
1183  * target.
1184  */
1185 static void
1186 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1187 {
1188         u_int target_id;
1189         u_int numtarg;
1190         unsigned long s;
1191
1192         target_id = 0;
1193         numtarg = 0;
1194
1195         if (aic79xx_no_reset != 0)
1196                 ahd->flags &= ~AHD_RESET_BUS_A;
1197
1198         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1199                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1200         else
1201                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1202
1203         ahd_lock(ahd, &s);
1204
1205         /*
1206          * Force negotiation to async for all targets that
1207          * will not see an initial bus reset.
1208          */
1209         for (; target_id < numtarg; target_id++) {
1210                 struct ahd_devinfo devinfo;
1211                 struct ahd_initiator_tinfo *tinfo;
1212                 struct ahd_tmode_tstate *tstate;
1213
1214                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1215                                             target_id, &tstate);
1216                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1217                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1218                 ahd_update_neg_request(ahd, &devinfo, tstate,
1219                                        tinfo, AHD_NEG_ALWAYS);
1220         }
1221         ahd_unlock(ahd, &s);
1222         /* Give the bus some time to recover */
1223         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1224                 ahd_freeze_simq(ahd);
1225                 msleep(AIC79XX_RESET_DELAY);
1226                 ahd_release_simq(ahd);
1227         }
1228 }
1229
1230 int
1231 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1232 {
1233         ahd->platform_data =
1234             malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1235         if (ahd->platform_data == NULL)
1236                 return (ENOMEM);
1237         memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1238         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1239         ahd_lockinit(ahd);
1240         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1241         return (0);
1242 }
1243
1244 void
1245 ahd_platform_free(struct ahd_softc *ahd)
1246 {
1247         struct scsi_target *starget;
1248         int i, j;
1249
1250         if (ahd->platform_data != NULL) {
1251                 /* destroy all of the device and target objects */
1252                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1253                         starget = ahd->platform_data->starget[i];
1254                         if (starget != NULL) {
1255                                 for (j = 0; j < AHD_NUM_LUNS; j++) {
1256                                         struct ahd_linux_target *targ =
1257                                                 scsi_transport_target_data(starget);
1258                                         if (targ->sdev[j] == NULL)
1259                                                 continue;
1260                                         targ->sdev[j] = NULL;
1261                                 }
1262                                 ahd->platform_data->starget[i] = NULL;
1263                         }
1264                 }
1265
1266                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1267                         free_irq(ahd->platform_data->irq, ahd);
1268                 if (ahd->tags[0] == BUS_SPACE_PIO
1269                  && ahd->bshs[0].ioport != 0)
1270                         release_region(ahd->bshs[0].ioport, 256);
1271                 if (ahd->tags[1] == BUS_SPACE_PIO
1272                  && ahd->bshs[1].ioport != 0)
1273                         release_region(ahd->bshs[1].ioport, 256);
1274                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1275                  && ahd->bshs[0].maddr != NULL) {
1276                         iounmap(ahd->bshs[0].maddr);
1277                         release_mem_region(ahd->platform_data->mem_busaddr,
1278                                            0x1000);
1279                 }
1280                 if (ahd->platform_data->host)
1281                         scsi_host_put(ahd->platform_data->host);
1282
1283                 free(ahd->platform_data, M_DEVBUF);
1284         }
1285 }
1286
1287 void
1288 ahd_platform_init(struct ahd_softc *ahd)
1289 {
1290         /*
1291          * Lookup and commit any modified IO Cell options.
1292          */
1293         if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1294                 struct ahd_linux_iocell_opts *iocell_opts;
1295
1296                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1297                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1298                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1299                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1300                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1301                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1302                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1303         }
1304
1305 }
1306
1307 void
1308 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1309 {
1310         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1311                                 SCB_GET_CHANNEL(ahd, scb),
1312                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1313                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1314 }
1315
1316 void
1317 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1318                       ahd_queue_alg alg)
1319 {
1320         struct scsi_target *starget;
1321         struct ahd_linux_target *targ;
1322         struct ahd_linux_device *dev;
1323         struct scsi_device *sdev;
1324         int was_queuing;
1325         int now_queuing;
1326
1327         starget = ahd->platform_data->starget[devinfo->target];
1328         targ = scsi_transport_target_data(starget);
1329         BUG_ON(targ == NULL);
1330         sdev = targ->sdev[devinfo->lun];
1331         if (sdev == NULL)
1332                 return;
1333
1334         dev = scsi_transport_device_data(sdev);
1335
1336         if (dev == NULL)
1337                 return;
1338         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1339         switch (alg) {
1340         default:
1341         case AHD_QUEUE_NONE:
1342                 now_queuing = 0;
1343                 break;
1344         case AHD_QUEUE_BASIC:
1345                 now_queuing = AHD_DEV_Q_BASIC;
1346                 break;
1347         case AHD_QUEUE_TAGGED:
1348                 now_queuing = AHD_DEV_Q_TAGGED;
1349                 break;
1350         }
1351         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1352          && (was_queuing != now_queuing)
1353          && (dev->active != 0)) {
1354                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1355                 dev->qfrozen++;
1356         }
1357
1358         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1359         if (now_queuing) {
1360                 u_int usertags;
1361
1362                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1363                 if (!was_queuing) {
1364                         /*
1365                          * Start out agressively and allow our
1366                          * dynamic queue depth algorithm to take
1367                          * care of the rest.
1368                          */
1369                         dev->maxtags = usertags;
1370                         dev->openings = dev->maxtags - dev->active;
1371                 }
1372                 if (dev->maxtags == 0) {
1373                         /*
1374                          * Queueing is disabled by the user.
1375                          */
1376                         dev->openings = 1;
1377                 } else if (alg == AHD_QUEUE_TAGGED) {
1378                         dev->flags |= AHD_DEV_Q_TAGGED;
1379                         if (aic79xx_periodic_otag != 0)
1380                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1381                 } else
1382                         dev->flags |= AHD_DEV_Q_BASIC;
1383         } else {
1384                 /* We can only have one opening. */
1385                 dev->maxtags = 0;
1386                 dev->openings =  1 - dev->active;
1387         }
1388
1389         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1390         case AHD_DEV_Q_BASIC:
1391                 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1392                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1393                 break;
1394         case AHD_DEV_Q_TAGGED:
1395                 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1396                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1397                 break;
1398         default:
1399                 /*
1400                  * We allow the OS to queue 2 untagged transactions to
1401                  * us at any time even though we can only execute them
1402                  * serially on the controller/device.  This should
1403                  * remove some latency.
1404                  */
1405                 scsi_deactivate_tcq(sdev, 1);
1406                 break;
1407         }
1408 }
1409
1410 int
1411 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1412                         int lun, u_int tag, role_t role, uint32_t status)
1413 {
1414         return 0;
1415 }
1416
1417 static u_int
1418 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1419 {
1420         static int warned_user;
1421         u_int tags;
1422
1423         tags = 0;
1424         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1425                 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
1426
1427                         if (warned_user == 0) {
1428                                 printf(KERN_WARNING
1429 "aic79xx: WARNING: Insufficient tag_info instances\n"
1430 "aic79xx: for installed controllers.  Using defaults\n"
1431 "aic79xx: Please update the aic79xx_tag_info array in\n"
1432 "aic79xx: the aic79xx_osm.c source file.\n");
1433                                 warned_user++;
1434                         }
1435                         tags = AHD_MAX_QUEUE;
1436                 } else {
1437                         adapter_tag_info_t *tag_info;
1438
1439                         tag_info = &aic79xx_tag_info[ahd->unit];
1440                         tags = tag_info->tag_commands[devinfo->target_offset];
1441                         if (tags > AHD_MAX_QUEUE)
1442                                 tags = AHD_MAX_QUEUE;
1443                 }
1444         }
1445         return (tags);
1446 }
1447
1448 /*
1449  * Determines the queue depth for a given device.
1450  */
1451 static void
1452 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1453 {
1454         struct  ahd_devinfo devinfo;
1455         u_int   tags;
1456         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1457
1458         ahd_compile_devinfo(&devinfo,
1459                             ahd->our_id,
1460                             sdev->sdev_target->id, sdev->lun,
1461                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1462                             ROLE_INITIATOR);
1463         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1464         if (tags != 0 && sdev->tagged_supported != 0) {
1465
1466                 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
1467                 ahd_print_devinfo(ahd, &devinfo);
1468                 printf("Tagged Queuing enabled.  Depth %d\n", tags);
1469         } else {
1470                 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
1471         }
1472 }
1473
1474 static int
1475 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1476                       struct scsi_cmnd *cmd)
1477 {
1478         struct   scb *scb;
1479         struct   hardware_scb *hscb;
1480         struct   ahd_initiator_tinfo *tinfo;
1481         struct   ahd_tmode_tstate *tstate;
1482         u_int    col_idx;
1483         uint16_t mask;
1484         unsigned long flags;
1485
1486         ahd_lock(ahd, &flags);
1487
1488         /*
1489          * Get an scb to use.
1490          */
1491         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1492                                     cmd->device->id, &tstate);
1493         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1494          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1495                 col_idx = AHD_NEVER_COL_IDX;
1496         } else {
1497                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1498                                             cmd->device->lun);
1499         }
1500         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1501                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1502                 ahd_unlock(ahd, &flags);
1503                 return SCSI_MLQUEUE_HOST_BUSY;
1504         }
1505
1506         scb->io_ctx = cmd;
1507         scb->platform_data->dev = dev;
1508         hscb = scb->hscb;
1509         cmd->host_scribble = (char *)scb;
1510
1511         /*
1512          * Fill out basics of the HSCB.
1513          */
1514         hscb->control = 0;
1515         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1516         hscb->lun = cmd->device->lun;
1517         scb->hscb->task_management = 0;
1518         mask = SCB_GET_TARGET_MASK(ahd, scb);
1519
1520         if ((ahd->user_discenable & mask) != 0)
1521                 hscb->control |= DISCENB;
1522
1523         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1524                 scb->flags |= SCB_PACKETIZED;
1525
1526         if ((tstate->auto_negotiate & mask) != 0) {
1527                 scb->flags |= SCB_AUTO_NEGOTIATE;
1528                 scb->hscb->control |= MK_MESSAGE;
1529         }
1530
1531         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1532                 int     msg_bytes;
1533                 uint8_t tag_msgs[2];
1534
1535                 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1536                 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1537                         hscb->control |= tag_msgs[0];
1538                         if (tag_msgs[0] == MSG_ORDERED_TASK)
1539                                 dev->commands_since_idle_or_otag = 0;
1540                 } else
1541                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1542                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1543                         hscb->control |= MSG_ORDERED_TASK;
1544                         dev->commands_since_idle_or_otag = 0;
1545                 } else {
1546                         hscb->control |= MSG_SIMPLE_TASK;
1547                 }
1548         }
1549
1550         hscb->cdb_len = cmd->cmd_len;
1551         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1552
1553         scb->platform_data->xfer_len = 0;
1554         ahd_set_residual(scb, 0);
1555         ahd_set_sense_residual(scb, 0);
1556         scb->sg_count = 0;
1557         if (cmd->use_sg != 0) {
1558                 void    *sg;
1559                 struct   scatterlist *cur_seg;
1560                 u_int    nseg;
1561                 int      dir;
1562
1563                 cur_seg = (struct scatterlist *)cmd->request_buffer;
1564                 dir = cmd->sc_data_direction;
1565                 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1566                                   cmd->use_sg, dir);
1567                 scb->platform_data->xfer_len = 0;
1568                 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1569                         dma_addr_t addr;
1570                         bus_size_t len;
1571
1572                         addr = sg_dma_address(cur_seg);
1573                         len = sg_dma_len(cur_seg);
1574                         scb->platform_data->xfer_len += len;
1575                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1576                                           /*last*/nseg == 1);
1577                 }
1578         } else if (cmd->request_bufflen != 0) {
1579                 void *sg;
1580                 dma_addr_t addr;
1581                 int dir;
1582
1583                 sg = scb->sg_list;
1584                 dir = cmd->sc_data_direction;
1585                 addr = pci_map_single(ahd->dev_softc,
1586                                       cmd->request_buffer,
1587                                       cmd->request_bufflen, dir);
1588                 scb->platform_data->xfer_len = cmd->request_bufflen;
1589                 scb->platform_data->buf_busaddr = addr;
1590                 sg = ahd_sg_setup(ahd, scb, sg, addr,
1591                                   cmd->request_bufflen, /*last*/TRUE);
1592         }
1593
1594         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1595         dev->openings--;
1596         dev->active++;
1597         dev->commands_issued++;
1598
1599         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1600                 dev->commands_since_idle_or_otag++;
1601         scb->flags |= SCB_ACTIVE;
1602         ahd_queue_scb(ahd, scb);
1603
1604         ahd_unlock(ahd, &flags);
1605
1606         return 0;
1607 }
1608
1609 /*
1610  * SCSI controller interrupt handler.
1611  */
1612 irqreturn_t
1613 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1614 {
1615         struct  ahd_softc *ahd;
1616         u_long  flags;
1617         int     ours;
1618
1619         ahd = (struct ahd_softc *) dev_id;
1620         ahd_lock(ahd, &flags);
1621         ours = ahd_intr(ahd);
1622         ahd_unlock(ahd, &flags);
1623         return IRQ_RETVAL(ours);
1624 }
1625
1626 void
1627 ahd_send_async(struct ahd_softc *ahd, char channel,
1628                u_int target, u_int lun, ac_code code, void *arg)
1629 {
1630         switch (code) {
1631         case AC_TRANSFER_NEG:
1632         {
1633                 char    buf[80];
1634                 struct  scsi_target *starget;
1635                 struct  info_str info;
1636                 struct  ahd_initiator_tinfo *tinfo;
1637                 struct  ahd_tmode_tstate *tstate;
1638                 unsigned int target_ppr_options;
1639
1640                 BUG_ON(target == CAM_TARGET_WILDCARD);
1641
1642                 info.buffer = buf;
1643                 info.length = sizeof(buf);
1644                 info.offset = 0;
1645                 info.pos = 0;
1646                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1647                                             target, &tstate);
1648
1649                 /*
1650                  * Don't bother reporting results while
1651                  * negotiations are still pending.
1652                  */
1653                 if (tinfo->curr.period != tinfo->goal.period
1654                  || tinfo->curr.width != tinfo->goal.width
1655                  || tinfo->curr.offset != tinfo->goal.offset
1656                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1657                         if (bootverbose == 0)
1658                                 break;
1659
1660                 /*
1661                  * Don't bother reporting results that
1662                  * are identical to those last reported.
1663                  */
1664                 starget = ahd->platform_data->starget[target];
1665                 if (starget == NULL)
1666                         break;
1667
1668                 target_ppr_options =
1669                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1670                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1671                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1672                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1673                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1674                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1675                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1676                         + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1677
1678                 if (tinfo->curr.period == spi_period(starget)
1679                     && tinfo->curr.width == spi_width(starget)
1680                     && tinfo->curr.offset == spi_offset(starget)
1681                  && tinfo->curr.ppr_options == target_ppr_options)
1682                         if (bootverbose == 0)
1683                                 break;
1684
1685                 spi_period(starget) = tinfo->curr.period;
1686                 spi_width(starget) = tinfo->curr.width;
1687                 spi_offset(starget) = tinfo->curr.offset;
1688                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1689                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1690                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1691                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1692                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1693                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1694                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1695                 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1696                 spi_display_xfer_agreement(starget);
1697                 break;
1698         }
1699         case AC_SENT_BDR:
1700         {
1701                 WARN_ON(lun != CAM_LUN_WILDCARD);
1702                 scsi_report_device_reset(ahd->platform_data->host,
1703                                          channel - 'A', target);
1704                 break;
1705         }
1706         case AC_BUS_RESET:
1707                 if (ahd->platform_data->host != NULL) {
1708                         scsi_report_bus_reset(ahd->platform_data->host,
1709                                               channel - 'A');
1710                 }
1711                 break;
1712         default:
1713                 panic("ahd_send_async: Unexpected async event");
1714         }
1715 }
1716
1717 /*
1718  * Calls the higher level scsi done function and frees the scb.
1719  */
1720 void
1721 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1722 {
1723         struct scsi_cmnd *cmd;
1724         struct    ahd_linux_device *dev;
1725
1726         if ((scb->flags & SCB_ACTIVE) == 0) {
1727                 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1728                 ahd_dump_card_state(ahd);
1729                 panic("Stopping for safety");
1730         }
1731         LIST_REMOVE(scb, pending_links);
1732         cmd = scb->io_ctx;
1733         dev = scb->platform_data->dev;
1734         dev->active--;
1735         dev->openings++;
1736         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1737                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1738                 dev->qfrozen--;
1739         }
1740         ahd_linux_unmap_scb(ahd, scb);
1741
1742         /*
1743          * Guard against stale sense data.
1744          * The Linux mid-layer assumes that sense
1745          * was retrieved anytime the first byte of
1746          * the sense buffer looks "sane".
1747          */
1748         cmd->sense_buffer[0] = 0;
1749         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1750                 uint32_t amount_xferred;
1751
1752                 amount_xferred =
1753                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1754                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1755 #ifdef AHD_DEBUG
1756                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1757                                 ahd_print_path(ahd, scb);
1758                                 printf("Set CAM_UNCOR_PARITY\n");
1759                         }
1760 #endif
1761                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1762 #ifdef AHD_REPORT_UNDERFLOWS
1763                 /*
1764                  * This code is disabled by default as some
1765                  * clients of the SCSI system do not properly
1766                  * initialize the underflow parameter.  This
1767                  * results in spurious termination of commands
1768                  * that complete as expected (e.g. underflow is
1769                  * allowed as command can return variable amounts
1770                  * of data.
1771                  */
1772                 } else if (amount_xferred < scb->io_ctx->underflow) {
1773                         u_int i;
1774
1775                         ahd_print_path(ahd, scb);
1776                         printf("CDB:");
1777                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1778                                 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1779                         printf("\n");
1780                         ahd_print_path(ahd, scb);
1781                         printf("Saw underflow (%ld of %ld bytes). "
1782                                "Treated as error\n",
1783                                 ahd_get_residual(scb),
1784                                 ahd_get_transfer_length(scb));
1785                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1786 #endif
1787                 } else {
1788                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1789                 }
1790         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1791                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1792         }
1793
1794         if (dev->openings == 1
1795          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1796          && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1797                 dev->tag_success_count++;
1798         /*
1799          * Some devices deal with temporary internal resource
1800          * shortages by returning queue full.  When the queue
1801          * full occurrs, we throttle back.  Slowly try to get
1802          * back to our previous queue depth.
1803          */
1804         if ((dev->openings + dev->active) < dev->maxtags
1805          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1806                 dev->tag_success_count = 0;
1807                 dev->openings++;
1808         }
1809
1810         if (dev->active == 0)
1811                 dev->commands_since_idle_or_otag = 0;
1812
1813         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1814                 printf("Recovery SCB completes\n");
1815                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1816                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1817                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1818
1819                 if (ahd->platform_data->eh_done)
1820                         complete(ahd->platform_data->eh_done);
1821         }
1822
1823         ahd_free_scb(ahd, scb);
1824         ahd_linux_queue_cmd_complete(ahd, cmd);
1825 }
1826
1827 static void
1828 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1829                              struct scsi_device *sdev, struct scb *scb)
1830 {
1831         struct  ahd_devinfo devinfo;
1832         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1833
1834         ahd_compile_devinfo(&devinfo,
1835                             ahd->our_id,
1836                             sdev->sdev_target->id, sdev->lun,
1837                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1838                             ROLE_INITIATOR);
1839
1840         /*
1841          * We don't currently trust the mid-layer to
1842          * properly deal with queue full or busy.  So,
1843          * when one occurs, we tell the mid-layer to
1844          * unconditionally requeue the command to us
1845          * so that we can retry it ourselves.  We also
1846          * implement our own throttling mechanism so
1847          * we don't clobber the device with too many
1848          * commands.
1849          */
1850         switch (ahd_get_scsi_status(scb)) {
1851         default:
1852                 break;
1853         case SCSI_STATUS_CHECK_COND:
1854         case SCSI_STATUS_CMD_TERMINATED:
1855         {
1856                 struct scsi_cmnd *cmd;
1857
1858                 /*
1859                  * Copy sense information to the OS's cmd
1860                  * structure if it is available.
1861                  */
1862                 cmd = scb->io_ctx;
1863                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1864                         struct scsi_status_iu_header *siu;
1865                         u_int sense_size;
1866                         u_int sense_offset;
1867
1868                         if (scb->flags & SCB_SENSE) {
1869                                 sense_size = MIN(sizeof(struct scsi_sense_data)
1870                                                - ahd_get_sense_residual(scb),
1871                                                  sizeof(cmd->sense_buffer));
1872                                 sense_offset = 0;
1873                         } else {
1874                                 /*
1875                                  * Copy only the sense data into the provided
1876                                  * buffer.
1877                                  */
1878                                 siu = (struct scsi_status_iu_header *)
1879                                     scb->sense_data;
1880                                 sense_size = MIN(scsi_4btoul(siu->sense_length),
1881                                                 sizeof(cmd->sense_buffer));
1882                                 sense_offset = SIU_SENSE_OFFSET(siu);
1883                         }
1884
1885                         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1886                         memcpy(cmd->sense_buffer,
1887                                ahd_get_sense_buf(ahd, scb)
1888                                + sense_offset, sense_size);
1889                         cmd->result |= (DRIVER_SENSE << 24);
1890
1891 #ifdef AHD_DEBUG
1892                         if (ahd_debug & AHD_SHOW_SENSE) {
1893                                 int i;
1894
1895                                 printf("Copied %d bytes of sense data at %d:",
1896                                        sense_size, sense_offset);
1897                                 for (i = 0; i < sense_size; i++) {
1898                                         if ((i & 0xF) == 0)
1899                                                 printf("\n");
1900                                         printf("0x%x ", cmd->sense_buffer[i]);
1901                                 }
1902                                 printf("\n");
1903                         }
1904 #endif
1905                 }
1906                 break;
1907         }
1908         case SCSI_STATUS_QUEUE_FULL:
1909                 /*
1910                  * By the time the core driver has returned this
1911                  * command, all other commands that were queued
1912                  * to us but not the device have been returned.
1913                  * This ensures that dev->active is equal to
1914                  * the number of commands actually queued to
1915                  * the device.
1916                  */
1917                 dev->tag_success_count = 0;
1918                 if (dev->active != 0) {
1919                         /*
1920                          * Drop our opening count to the number
1921                          * of commands currently outstanding.
1922                          */
1923                         dev->openings = 0;
1924 #ifdef AHD_DEBUG
1925                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1926                                 ahd_print_path(ahd, scb);
1927                                 printf("Dropping tag count to %d\n",
1928                                        dev->active);
1929                         }
1930 #endif
1931                         if (dev->active == dev->tags_on_last_queuefull) {
1932
1933                                 dev->last_queuefull_same_count++;
1934                                 /*
1935                                  * If we repeatedly see a queue full
1936                                  * at the same queue depth, this
1937                                  * device has a fixed number of tag
1938                                  * slots.  Lock in this tag depth
1939                                  * so we stop seeing queue fulls from
1940                                  * this device.
1941                                  */
1942                                 if (dev->last_queuefull_same_count
1943                                  == AHD_LOCK_TAGS_COUNT) {
1944                                         dev->maxtags = dev->active;
1945                                         ahd_print_path(ahd, scb);
1946                                         printf("Locking max tag count at %d\n",
1947                                                dev->active);
1948                                 }
1949                         } else {
1950                                 dev->tags_on_last_queuefull = dev->active;
1951                                 dev->last_queuefull_same_count = 0;
1952                         }
1953                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1954                         ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1955                         ahd_platform_set_tags(ahd, &devinfo,
1956                                      (dev->flags & AHD_DEV_Q_BASIC)
1957                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1958                         break;
1959                 }
1960                 /*
1961                  * Drop down to a single opening, and treat this
1962                  * as if the target returned BUSY SCSI status.
1963                  */
1964                 dev->openings = 1;
1965                 ahd_platform_set_tags(ahd, &devinfo,
1966                              (dev->flags & AHD_DEV_Q_BASIC)
1967                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1968                 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1969         }
1970 }
1971
1972 static void
1973 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1974 {
1975         int status;
1976         int new_status = DID_OK;
1977         int do_fallback = 0;
1978         int scsi_status;
1979
1980         /*
1981          * Map CAM error codes into Linux Error codes.  We
1982          * avoid the conversion so that the DV code has the
1983          * full error information available when making
1984          * state change decisions.
1985          */
1986
1987         status = ahd_cmd_get_transaction_status(cmd);
1988         switch (status) {
1989         case CAM_REQ_INPROG:
1990         case CAM_REQ_CMP:
1991                 new_status = DID_OK;
1992                 break;
1993         case CAM_AUTOSENSE_FAIL:
1994                 new_status = DID_ERROR;
1995                 /* Fallthrough */
1996         case CAM_SCSI_STATUS_ERROR:
1997                 scsi_status = ahd_cmd_get_scsi_status(cmd);
1998
1999                 switch(scsi_status) {
2000                 case SCSI_STATUS_CMD_TERMINATED:
2001                 case SCSI_STATUS_CHECK_COND:
2002                         if ((cmd->result >> 24) != DRIVER_SENSE) {
2003                                 do_fallback = 1;
2004                         } else {
2005                                 struct scsi_sense_data *sense;
2006
2007                                 sense = (struct scsi_sense_data *)
2008                                         &cmd->sense_buffer;
2009                                 if (sense->extra_len >= 5 &&
2010                                     (sense->add_sense_code == 0x47
2011                                      || sense->add_sense_code == 0x48))
2012                                         do_fallback = 1;
2013                         }
2014                         break;
2015                 default:
2016                         break;
2017                 }
2018                 break;
2019         case CAM_REQ_ABORTED:
2020                 new_status = DID_ABORT;
2021                 break;
2022         case CAM_BUSY:
2023                 new_status = DID_BUS_BUSY;
2024                 break;
2025         case CAM_REQ_INVALID:
2026         case CAM_PATH_INVALID:
2027                 new_status = DID_BAD_TARGET;
2028                 break;
2029         case CAM_SEL_TIMEOUT:
2030                 new_status = DID_NO_CONNECT;
2031                 break;
2032         case CAM_SCSI_BUS_RESET:
2033         case CAM_BDR_SENT:
2034                 new_status = DID_RESET;
2035                 break;
2036         case CAM_UNCOR_PARITY:
2037                 new_status = DID_PARITY;
2038                 do_fallback = 1;
2039                 break;
2040         case CAM_CMD_TIMEOUT:
2041                 new_status = DID_TIME_OUT;
2042                 do_fallback = 1;
2043                 break;
2044         case CAM_REQ_CMP_ERR:
2045         case CAM_UNEXP_BUSFREE:
2046         case CAM_DATA_RUN_ERR:
2047                 new_status = DID_ERROR;
2048                 do_fallback = 1;
2049                 break;
2050         case CAM_UA_ABORT:
2051         case CAM_NO_HBA:
2052         case CAM_SEQUENCE_FAIL:
2053         case CAM_CCB_LEN_ERR:
2054         case CAM_PROVIDE_FAIL:
2055         case CAM_REQ_TERMIO:
2056         case CAM_UNREC_HBA_ERROR:
2057         case CAM_REQ_TOO_BIG:
2058                 new_status = DID_ERROR;
2059                 break;
2060         case CAM_REQUEUE_REQ:
2061                 new_status = DID_REQUEUE;
2062                 break;
2063         default:
2064                 /* We should never get here */
2065                 new_status = DID_ERROR;
2066                 break;
2067         }
2068
2069         if (do_fallback) {
2070                 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2071                        ahd_name(ahd), status, cmd->device->channel,
2072                        cmd->device->id, cmd->device->lun);
2073         }
2074
2075         ahd_cmd_set_transaction_status(cmd, new_status);
2076
2077         cmd->scsi_done(cmd);
2078 }
2079
2080 void
2081 ahd_freeze_simq(struct ahd_softc *ahd)
2082 {
2083         scsi_block_requests(ahd->platform_data->host);
2084 }
2085
2086 void
2087 ahd_release_simq(struct ahd_softc *ahd)
2088 {
2089         scsi_unblock_requests(ahd->platform_data->host);
2090 }
2091
2092 static int
2093 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2094 {
2095         struct ahd_softc *ahd;
2096         struct ahd_linux_device *dev;
2097         struct scb *pending_scb;
2098         u_int  saved_scbptr;
2099         u_int  active_scbptr;
2100         u_int  last_phase;
2101         u_int  saved_scsiid;
2102         u_int  cdb_byte;
2103         int    retval;
2104         int    was_paused;
2105         int    paused;
2106         int    wait;
2107         int    disconnected;
2108         ahd_mode_state saved_modes;
2109         unsigned long flags;
2110
2111         pending_scb = NULL;
2112         paused = FALSE;
2113         wait = FALSE;
2114         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2115
2116         scmd_printk(KERN_INFO, cmd,
2117                     "Attempting to queue an ABORT message:");
2118
2119         printf("CDB:");
2120         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2121                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2122         printf("\n");
2123
2124         ahd_lock(ahd, &flags);
2125
2126         /*
2127          * First determine if we currently own this command.
2128          * Start by searching the device queue.  If not found
2129          * there, check the pending_scb list.  If not found
2130          * at all, and the system wanted us to just abort the
2131          * command, return success.
2132          */
2133         dev = scsi_transport_device_data(cmd->device);
2134
2135         if (dev == NULL) {
2136                 /*
2137                  * No target device for this command exists,
2138                  * so we must not still own the command.
2139                  */
2140                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2141                 retval = SUCCESS;
2142                 goto no_cmd;
2143         }
2144
2145         /*
2146          * See if we can find a matching cmd in the pending list.
2147          */
2148         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2149                 if (pending_scb->io_ctx == cmd)
2150                         break;
2151         }
2152
2153         if (pending_scb == NULL) {
2154                 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2155                 goto no_cmd;
2156         }
2157
2158         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2159                 /*
2160                  * We can't queue two recovery actions using the same SCB
2161                  */
2162                 retval = FAILED;
2163                 goto  done;
2164         }
2165
2166         /*
2167          * Ensure that the card doesn't do anything
2168          * behind our back.  Also make sure that we
2169          * didn't "just" miss an interrupt that would
2170          * affect this cmd.
2171          */
2172         was_paused = ahd_is_paused(ahd);
2173         ahd_pause_and_flushwork(ahd);
2174         paused = TRUE;
2175
2176         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2177                 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2178                 goto no_cmd;
2179         }
2180
2181         printf("%s: At time of recovery, card was %spaused\n",
2182                ahd_name(ahd), was_paused ? "" : "not ");
2183         ahd_dump_card_state(ahd);
2184
2185         disconnected = TRUE;
2186         if (ahd_search_qinfifo(ahd, cmd->device->id,
2187                                cmd->device->channel + 'A',
2188                                cmd->device->lun,
2189                                pending_scb->hscb->tag,
2190                                ROLE_INITIATOR, CAM_REQ_ABORTED,
2191                                SEARCH_COMPLETE) > 0) {
2192                 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2193                        ahd_name(ahd), cmd->device->channel,
2194                        cmd->device->id, cmd->device->lun);
2195                 retval = SUCCESS;
2196                 goto done;
2197         }
2198
2199         saved_modes = ahd_save_modes(ahd);
2200         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2201         last_phase = ahd_inb(ahd, LASTPHASE);
2202         saved_scbptr = ahd_get_scbptr(ahd);
2203         active_scbptr = saved_scbptr;
2204         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2205                 struct scb *bus_scb;
2206
2207                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2208                 if (bus_scb == pending_scb)
2209                         disconnected = FALSE;
2210         }
2211
2212         /*
2213          * At this point, pending_scb is the scb associated with the
2214          * passed in command.  That command is currently active on the
2215          * bus or is in the disconnected state.
2216          */
2217         saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2218         if (last_phase != P_BUSFREE
2219             && SCB_GET_TAG(pending_scb) == active_scbptr) {
2220
2221                 /*
2222                  * We're active on the bus, so assert ATN
2223                  * and hope that the target responds.
2224                  */
2225                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2226                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2227                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2228                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2229                 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2230                 wait = TRUE;
2231         } else if (disconnected) {
2232
2233                 /*
2234                  * Actually re-queue this SCB in an attempt
2235                  * to select the device before it reconnects.
2236                  */
2237                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2238                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2239                 pending_scb->hscb->cdb_len = 0;
2240                 pending_scb->hscb->task_attribute = 0;
2241                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2242
2243                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2244                         /*
2245                          * Mark the SCB has having an outstanding
2246                          * task management function.  Should the command
2247                          * complete normally before the task management
2248                          * function can be sent, the host will be notified
2249                          * to abort our requeued SCB.
2250                          */
2251                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2252                                  pending_scb->hscb->task_management);
2253                 } else {
2254                         /*
2255                          * If non-packetized, set the MK_MESSAGE control
2256                          * bit indicating that we desire to send a message.
2257                          * We also set the disconnected flag since there is
2258                          * no guarantee that our SCB control byte matches
2259                          * the version on the card.  We don't want the
2260                          * sequencer to abort the command thinking an
2261                          * unsolicited reselection occurred.
2262                          */
2263                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2264
2265                         /*
2266                          * The sequencer will never re-reference the
2267                          * in-core SCB.  To make sure we are notified
2268                          * during reslection, set the MK_MESSAGE flag in
2269                          * the card's copy of the SCB.
2270                          */
2271                         ahd_outb(ahd, SCB_CONTROL,
2272                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2273                 }
2274
2275                 /*
2276                  * Clear out any entries in the QINFIFO first
2277                  * so we are the next SCB for this target
2278                  * to run.
2279                  */
2280                 ahd_search_qinfifo(ahd, cmd->device->id,
2281                                    cmd->device->channel + 'A', cmd->device->lun,
2282                                    SCB_LIST_NULL, ROLE_INITIATOR,
2283                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2284                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2285                 ahd_set_scbptr(ahd, saved_scbptr);
2286                 ahd_print_path(ahd, pending_scb);
2287                 printf("Device is disconnected, re-queuing SCB\n");
2288                 wait = TRUE;
2289         } else {
2290                 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2291                 retval = FAILED;
2292                 goto done;
2293         }
2294
2295 no_cmd:
2296         /*
2297          * Our assumption is that if we don't have the command, no
2298          * recovery action was required, so we return success.  Again,
2299          * the semantics of the mid-layer recovery engine are not
2300          * well defined, so this may change in time.
2301          */
2302         retval = SUCCESS;
2303 done:
2304         if (paused)
2305                 ahd_unpause(ahd);
2306         if (wait) {
2307                 DECLARE_COMPLETION(done);
2308
2309                 ahd->platform_data->eh_done = &done;
2310                 ahd_unlock(ahd, &flags);
2311
2312                 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2313                 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2314                         ahd_lock(ahd, &flags);
2315                         ahd->platform_data->eh_done = NULL;
2316                         ahd_unlock(ahd, &flags);
2317                         printf("%s: Timer Expired (active %d)\n",
2318                                ahd_name(ahd), dev->active);
2319                         retval = FAILED;
2320                 }
2321                 printf("Recovery code awake\n");
2322         } else
2323                 ahd_unlock(ahd, &flags);
2324
2325         if (retval != SUCCESS)
2326                 printf("%s: Command abort returning 0x%x\n",
2327                        ahd_name(ahd), retval);
2328
2329         return retval;
2330 }
2331
2332 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2333 {
2334         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2335         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2336         struct ahd_devinfo devinfo;
2337         unsigned long flags;
2338
2339         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2340                             starget->channel + 'A', ROLE_INITIATOR);
2341         ahd_lock(ahd, &flags);
2342         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2343         ahd_unlock(ahd, &flags);
2344 }
2345
2346 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2347 {
2348         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2349         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2350         struct ahd_tmode_tstate *tstate;
2351         struct ahd_initiator_tinfo *tinfo
2352                 = ahd_fetch_transinfo(ahd,
2353                                       starget->channel + 'A',
2354                                       shost->this_id, starget->id, &tstate);
2355         struct ahd_devinfo devinfo;
2356         unsigned int ppr_options = tinfo->goal.ppr_options;
2357         unsigned int dt;
2358         unsigned long flags;
2359         unsigned long offset = tinfo->goal.offset;
2360
2361 #ifdef AHD_DEBUG
2362         if ((ahd_debug & AHD_SHOW_DV) != 0)
2363                 printf("%s: set period to %d\n", ahd_name(ahd), period);
2364 #endif
2365         if (offset == 0)
2366                 offset = MAX_OFFSET;
2367
2368         if (period < 8)
2369                 period = 8;
2370         if (period < 10) {
2371                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2372                 if (period == 8)
2373                         ppr_options |= MSG_EXT_PPR_IU_REQ;
2374         }
2375
2376         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2377
2378         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2379                             starget->channel + 'A', ROLE_INITIATOR);
2380
2381         /* all PPR requests apart from QAS require wide transfers */
2382         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2383                 if (spi_width(starget) == 0)
2384                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2385         }
2386
2387         ahd_find_syncrate(ahd, &period, &ppr_options,
2388                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2389
2390         ahd_lock(ahd, &flags);
2391         ahd_set_syncrate(ahd, &devinfo, period, offset,
2392                          ppr_options, AHD_TRANS_GOAL, FALSE);
2393         ahd_unlock(ahd, &flags);
2394 }
2395
2396 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2397 {
2398         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2399         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2400         struct ahd_tmode_tstate *tstate;
2401         struct ahd_initiator_tinfo *tinfo
2402                 = ahd_fetch_transinfo(ahd,
2403                                       starget->channel + 'A',
2404                                       shost->this_id, starget->id, &tstate);
2405         struct ahd_devinfo devinfo;
2406         unsigned int ppr_options = 0;
2407         unsigned int period = 0;
2408         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2409         unsigned long flags;
2410
2411 #ifdef AHD_DEBUG
2412         if ((ahd_debug & AHD_SHOW_DV) != 0)
2413                 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2414 #endif
2415
2416         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2417                             starget->channel + 'A', ROLE_INITIATOR);
2418         if (offset != 0) {
2419                 period = tinfo->goal.period;
2420                 ppr_options = tinfo->goal.ppr_options;
2421                 ahd_find_syncrate(ahd, &period, &ppr_options,
2422                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2423         }
2424
2425         ahd_lock(ahd, &flags);
2426         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2427                          AHD_TRANS_GOAL, FALSE);
2428         ahd_unlock(ahd, &flags);
2429 }
2430
2431 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2432 {
2433         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2434         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2435         struct ahd_tmode_tstate *tstate;
2436         struct ahd_initiator_tinfo *tinfo
2437                 = ahd_fetch_transinfo(ahd,
2438                                       starget->channel + 'A',
2439                                       shost->this_id, starget->id, &tstate);
2440         struct ahd_devinfo devinfo;
2441         unsigned int ppr_options = tinfo->goal.ppr_options
2442                 & ~MSG_EXT_PPR_DT_REQ;
2443         unsigned int period = tinfo->goal.period;
2444         unsigned int width = tinfo->goal.width;
2445         unsigned long flags;
2446
2447 #ifdef AHD_DEBUG
2448         if ((ahd_debug & AHD_SHOW_DV) != 0)
2449                 printf("%s: %s DT\n", ahd_name(ahd),
2450                        dt ? "enabling" : "disabling");
2451 #endif
2452         if (dt) {
2453                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2454                 if (!width)
2455                         ahd_linux_set_width(starget, 1);
2456         } else {
2457                 if (period <= 9)
2458                         period = 10; /* If resetting DT, period must be >= 25ns */
2459                 /* IU is invalid without DT set */
2460                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2461         }
2462         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2463                             starget->channel + 'A', ROLE_INITIATOR);
2464         ahd_find_syncrate(ahd, &period, &ppr_options,
2465                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2466
2467         ahd_lock(ahd, &flags);
2468         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2469                          ppr_options, AHD_TRANS_GOAL, FALSE);
2470         ahd_unlock(ahd, &flags);
2471 }
2472
2473 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2474 {
2475         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2476         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2477         struct ahd_tmode_tstate *tstate;
2478         struct ahd_initiator_tinfo *tinfo
2479                 = ahd_fetch_transinfo(ahd,
2480                                       starget->channel + 'A',
2481                                       shost->this_id, starget->id, &tstate);
2482         struct ahd_devinfo devinfo;
2483         unsigned int ppr_options = tinfo->goal.ppr_options
2484                 & ~MSG_EXT_PPR_QAS_REQ;
2485         unsigned int period = tinfo->goal.period;
2486         unsigned int dt;
2487         unsigned long flags;
2488
2489 #ifdef AHD_DEBUG
2490         if ((ahd_debug & AHD_SHOW_DV) != 0)
2491                 printf("%s: %s QAS\n", ahd_name(ahd),
2492                        qas ? "enabling" : "disabling");
2493 #endif
2494
2495         if (qas) {
2496                 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2497         }
2498
2499         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2500
2501         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2502                             starget->channel + 'A', ROLE_INITIATOR);
2503         ahd_find_syncrate(ahd, &period, &ppr_options,
2504                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2505
2506         ahd_lock(ahd, &flags);
2507         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2508                          ppr_options, AHD_TRANS_GOAL, FALSE);
2509         ahd_unlock(ahd, &flags);
2510 }
2511
2512 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2513 {
2514         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2515         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2516         struct ahd_tmode_tstate *tstate;
2517         struct ahd_initiator_tinfo *tinfo
2518                 = ahd_fetch_transinfo(ahd,
2519                                       starget->channel + 'A',
2520                                       shost->this_id, starget->id, &tstate);
2521         struct ahd_devinfo devinfo;
2522         unsigned int ppr_options = tinfo->goal.ppr_options
2523                 & ~MSG_EXT_PPR_IU_REQ;
2524         unsigned int period = tinfo->goal.period;
2525         unsigned int dt;
2526         unsigned long flags;
2527
2528 #ifdef AHD_DEBUG
2529         if ((ahd_debug & AHD_SHOW_DV) != 0)
2530                 printf("%s: %s IU\n", ahd_name(ahd),
2531                        iu ? "enabling" : "disabling");
2532 #endif
2533
2534         if (iu) {
2535                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2536                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2537         }
2538
2539         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2540
2541         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2542                             starget->channel + 'A', ROLE_INITIATOR);
2543         ahd_find_syncrate(ahd, &period, &ppr_options,
2544                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2545
2546         ahd_lock(ahd, &flags);
2547         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2548                          ppr_options, AHD_TRANS_GOAL, FALSE);
2549         ahd_unlock(ahd, &flags);
2550 }
2551
2552 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2553 {
2554         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2555         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2556         struct ahd_tmode_tstate *tstate;
2557         struct ahd_initiator_tinfo *tinfo
2558                 = ahd_fetch_transinfo(ahd,
2559                                       starget->channel + 'A',
2560                                       shost->this_id, starget->id, &tstate);
2561         struct ahd_devinfo devinfo;
2562         unsigned int ppr_options = tinfo->goal.ppr_options
2563                 & ~MSG_EXT_PPR_RD_STRM;
2564         unsigned int period = tinfo->goal.period;
2565         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2566         unsigned long flags;
2567
2568 #ifdef AHD_DEBUG
2569         if ((ahd_debug & AHD_SHOW_DV) != 0)
2570                 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2571                        rdstrm  ? "enabling" : "disabling");
2572 #endif
2573
2574         if (rdstrm)
2575                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2576
2577         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2578                             starget->channel + 'A', ROLE_INITIATOR);
2579         ahd_find_syncrate(ahd, &period, &ppr_options,
2580                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2581
2582         ahd_lock(ahd, &flags);
2583         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2584                          ppr_options, AHD_TRANS_GOAL, FALSE);
2585         ahd_unlock(ahd, &flags);
2586 }
2587
2588 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2589 {
2590         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2591         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2592         struct ahd_tmode_tstate *tstate;
2593         struct ahd_initiator_tinfo *tinfo
2594                 = ahd_fetch_transinfo(ahd,
2595                                       starget->channel + 'A',
2596                                       shost->this_id, starget->id, &tstate);
2597         struct ahd_devinfo devinfo;
2598         unsigned int ppr_options = tinfo->goal.ppr_options
2599                 & ~MSG_EXT_PPR_WR_FLOW;
2600         unsigned int period = tinfo->goal.period;
2601         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2602         unsigned long flags;
2603
2604 #ifdef AHD_DEBUG
2605         if ((ahd_debug & AHD_SHOW_DV) != 0)
2606                 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2607                        wrflow ? "enabling" : "disabling");
2608 #endif
2609
2610         if (wrflow)
2611                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2612
2613         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2614                             starget->channel + 'A', ROLE_INITIATOR);
2615         ahd_find_syncrate(ahd, &period, &ppr_options,
2616                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2617
2618         ahd_lock(ahd, &flags);
2619         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2620                          ppr_options, AHD_TRANS_GOAL, FALSE);
2621         ahd_unlock(ahd, &flags);
2622 }
2623
2624 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2625 {
2626         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2627         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2628         struct ahd_tmode_tstate *tstate;
2629         struct ahd_initiator_tinfo *tinfo
2630                 = ahd_fetch_transinfo(ahd,
2631                                       starget->channel + 'A',
2632                                       shost->this_id, starget->id, &tstate);
2633         struct ahd_devinfo devinfo;
2634         unsigned int ppr_options = tinfo->goal.ppr_options
2635                 & ~MSG_EXT_PPR_RTI;
2636         unsigned int period = tinfo->goal.period;
2637         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2638         unsigned long flags;
2639
2640         if ((ahd->features & AHD_RTI) == 0) {
2641 #ifdef AHD_DEBUG
2642                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2643                         printf("%s: RTI not available\n", ahd_name(ahd));
2644 #endif
2645                 return;
2646         }
2647
2648 #ifdef AHD_DEBUG
2649         if ((ahd_debug & AHD_SHOW_DV) != 0)
2650                 printf("%s: %s RTI\n", ahd_name(ahd),
2651                        rti ? "enabling" : "disabling");
2652 #endif
2653
2654         if (rti)
2655                 ppr_options |= MSG_EXT_PPR_RTI;
2656
2657         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2658                             starget->channel + 'A', ROLE_INITIATOR);
2659         ahd_find_syncrate(ahd, &period, &ppr_options,
2660                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2661
2662         ahd_lock(ahd, &flags);
2663         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2664                          ppr_options, AHD_TRANS_GOAL, FALSE);
2665         ahd_unlock(ahd, &flags);
2666 }
2667
2668 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2669 {
2670         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2671         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2672         struct ahd_tmode_tstate *tstate;
2673         struct ahd_initiator_tinfo *tinfo
2674                 = ahd_fetch_transinfo(ahd,
2675                                       starget->channel + 'A',
2676                                       shost->this_id, starget->id, &tstate);
2677         struct ahd_devinfo devinfo;
2678         unsigned int ppr_options = tinfo->goal.ppr_options
2679                 & ~MSG_EXT_PPR_PCOMP_EN;
2680         unsigned int period = tinfo->goal.period;
2681         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2682         unsigned long flags;
2683
2684 #ifdef AHD_DEBUG
2685         if ((ahd_debug & AHD_SHOW_DV) != 0)
2686                 printf("%s: %s Precompensation\n", ahd_name(ahd),
2687                        pcomp ? "Enable" : "Disable");
2688 #endif
2689
2690         if (pcomp)
2691                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2692
2693         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2694                             starget->channel + 'A', ROLE_INITIATOR);
2695         ahd_find_syncrate(ahd, &period, &ppr_options,
2696                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2697
2698         ahd_lock(ahd, &flags);
2699         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2700                          ppr_options, AHD_TRANS_GOAL, FALSE);
2701         ahd_unlock(ahd, &flags);
2702 }
2703
2704 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2705 {
2706         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2707         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2708         struct ahd_tmode_tstate *tstate;
2709         struct ahd_initiator_tinfo *tinfo
2710                 = ahd_fetch_transinfo(ahd,
2711                                       starget->channel + 'A',
2712                                       shost->this_id, starget->id, &tstate);
2713         struct ahd_devinfo devinfo;
2714         unsigned int ppr_options = tinfo->goal.ppr_options
2715                 & ~MSG_EXT_PPR_HOLD_MCS;
2716         unsigned int period = tinfo->goal.period;
2717         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2718         unsigned long flags;
2719
2720         if (hold)
2721                 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2722
2723         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2724                             starget->channel + 'A', ROLE_INITIATOR);
2725         ahd_find_syncrate(ahd, &period, &ppr_options,
2726                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2727
2728         ahd_lock(ahd, &flags);
2729         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2730                          ppr_options, AHD_TRANS_GOAL, FALSE);
2731         ahd_unlock(ahd, &flags);
2732 }
2733
2734
2735
2736 static struct spi_function_template ahd_linux_transport_functions = {
2737         .set_offset     = ahd_linux_set_offset,
2738         .show_offset    = 1,
2739         .set_period     = ahd_linux_set_period,
2740         .show_period    = 1,
2741         .set_width      = ahd_linux_set_width,
2742         .show_width     = 1,
2743         .set_dt         = ahd_linux_set_dt,
2744         .show_dt        = 1,
2745         .set_iu         = ahd_linux_set_iu,
2746         .show_iu        = 1,
2747         .set_qas        = ahd_linux_set_qas,
2748         .show_qas       = 1,
2749         .set_rd_strm    = ahd_linux_set_rd_strm,
2750         .show_rd_strm   = 1,
2751         .set_wr_flow    = ahd_linux_set_wr_flow,
2752         .show_wr_flow   = 1,
2753         .set_rti        = ahd_linux_set_rti,
2754         .show_rti       = 1,
2755         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2756         .show_pcomp_en  = 1,
2757         .set_hold_mcs   = ahd_linux_set_hold_mcs,
2758         .show_hold_mcs  = 1,
2759 };
2760
2761 static int __init
2762 ahd_linux_init(void)
2763 {
2764         int     error = 0;
2765
2766         /*
2767          * If we've been passed any parameters, process them now.
2768          */
2769         if (aic79xx)
2770                 aic79xx_setup(aic79xx);
2771
2772         ahd_linux_transport_template =
2773                 spi_attach_transport(&ahd_linux_transport_functions);
2774         if (!ahd_linux_transport_template)
2775                 return -ENODEV;
2776
2777         scsi_transport_reserve_target(ahd_linux_transport_template,
2778                                       sizeof(struct ahd_linux_target));
2779         scsi_transport_reserve_device(ahd_linux_transport_template,
2780                                       sizeof(struct ahd_linux_device));
2781
2782         error = ahd_linux_pci_init();
2783         if (error)
2784                 spi_release_transport(ahd_linux_transport_template);
2785         return error;
2786 }
2787
2788 static void __exit
2789 ahd_linux_exit(void)
2790 {
2791         ahd_linux_pci_exit();
2792         spi_release_transport(ahd_linux_transport_template);
2793 }
2794
2795 module_init(ahd_linux_init);
2796 module_exit(ahd_linux_exit);