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         unsigned long flags;
 786
 787         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 788 #ifdef AHD_DEBUG
 789         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 790                 printf("%s: Bus reset called for cmd %p\n",
 791                        ahd_name(ahd), cmd);
 792 #endif
 793         ahd_lock(ahd, &flags);
 794
 795         found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 796                                   /*initiate reset*/TRUE);
 797         ahd_unlock(ahd, &flags);
 798
 799         if (bootverbose)
 800                 printf("%s: SCSI bus reset delivered. "
 801                        "%d SCBs aborted.\n", ahd_name(ahd), found);
 802
 803         return (SUCCESS);
 804 }
 805
 806 struct scsi_host_template aic79xx_driver_template = {
 807         .module                 = THIS_MODULE,
 808         .name                   = "aic79xx",
 809         .proc_name              = "aic79xx",
 810         .proc_info              = ahd_linux_proc_info,
 811         .info                   = ahd_linux_info,
 812         .queuecommand           = ahd_linux_queue,
 813         .eh_abort_handler       = ahd_linux_abort,
 814         .eh_device_reset_handler = ahd_linux_dev_reset,
 815         .eh_bus_reset_handler   = ahd_linux_bus_reset,
 816 #if defined(__i386__)
 817         .bios_param             = ahd_linux_biosparam,
 818 #endif
 819         .can_queue              = AHD_MAX_QUEUE,
 820         .this_id                = -1,
 821         .cmd_per_lun            = 2,
 822         .use_clustering         = ENABLE_CLUSTERING,
 823         .slave_alloc            = ahd_linux_slave_alloc,
 824         .slave_configure        = ahd_linux_slave_configure,
 825         .slave_destroy          = ahd_linux_slave_destroy,
 826         .target_alloc           = ahd_linux_target_alloc,
 827         .target_destroy         = ahd_linux_target_destroy,
 828 };
 829
 830 /******************************** Bus DMA *************************************/
 831 int
 832 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
 833                    bus_size_t alignment, bus_size_t boundary,
 834                    dma_addr_t lowaddr, dma_addr_t highaddr,
 835                    bus_dma_filter_t *filter, void *filterarg,
 836                    bus_size_t maxsize, int nsegments,
 837                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
 838 {
 839         bus_dma_tag_t dmat;
 840
 841         dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
 842         if (dmat == NULL)
 843                 return (ENOMEM);
 844
 845         /*
 846          * Linux is very simplistic about DMA memory.  For now don't
 847          * maintain all specification information.  Once Linux supplies
 848          * better facilities for doing these operations, or the
 849          * needs of this particular driver change, we might need to do
 850          * more here.
 851          */
 852         dmat->alignment = alignment;
 853         dmat->boundary = boundary;
 854         dmat->maxsize = maxsize;
 855         *ret_tag = dmat;
 856         return (0);
 857 }
 858
 859 void
 860 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
 861 {
 862         free(dmat, M_DEVBUF);
 863 }
 864
 865 int
 866 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
 867                  int flags, bus_dmamap_t *mapp)
 868 {
 869         *vaddr = pci_alloc_consistent(ahd->dev_softc,
 870                                       dmat->maxsize, mapp);
 871         if (*vaddr == NULL)
 872                 return (ENOMEM);
 873         return(0);
 874 }
 875
 876 void
 877 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
 878                 void* vaddr, bus_dmamap_t map)
 879 {
 880         pci_free_consistent(ahd->dev_softc, dmat->maxsize,
 881                             vaddr, map);
 882 }
 883
 884 int
 885 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
 886                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
 887                 void *cb_arg, int flags)
 888 {
 889         /*
 890          * Assume for now that this will only be used during
 891          * initialization and not for per-transaction buffer mapping.
 892          */
 893         bus_dma_segment_t stack_sg;
 894
 895         stack_sg.ds_addr = map;
 896         stack_sg.ds_len = dmat->maxsize;
 897         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
 898         return (0);
 899 }
 900
 901 void
 902 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 903 {
 904 }
 905
 906 int
 907 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 908 {
 909         /* Nothing to do */
 910         return (0);
 911 }
 912
 913 /********************* Platform Dependent Functions ***************************/
 914 static void
 915 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
 916 {
 917
 918         if ((instance >= 0)
 919          && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
 920                 uint8_t *iocell_info;
 921
 922                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
 923                 iocell_info[index] = value & 0xFFFF;
 924                 if (bootverbose)
 925                         printf("iocell[%d:%ld] = %d\n", instance, index, value);
 926         }
 927 }
 928
 929 static void
 930 ahd_linux_setup_tag_info_global(char *p)
 931 {
 932         int tags, i, j;
 933
 934         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
 935         printf("Setting Global Tags= %d\n", tags);
 936
 937         for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
 938                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
 939                         aic79xx_tag_info[i].tag_commands[j] = tags;
 940                 }
 941         }
 942 }
 943
 944 static void
 945 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
 946 {
 947
 948         if ((instance >= 0) && (targ >= 0)
 949          && (instance < NUM_ELEMENTS(aic79xx_tag_info))
 950          && (targ < AHD_NUM_TARGETS)) {
 951                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
 952                 if (bootverbose)
 953                         printf("tag_info[%d:%d] = %d\n", instance, targ, value);
 954         }
 955 }
 956
 957 static char *
 958 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
 959                        void (*callback)(u_long, int, int, int32_t),
 960                        u_long callback_arg)
 961 {
 962         char    *tok_end;
 963         char    *tok_end2;
 964         int      i;
 965         int      instance;
 966         int      targ;
 967         int      done;
 968         char     tok_list[] = {'.', ',', '{', '}', '\0'};
 969
 970         /* All options use a ':' name/arg separator */
 971         if (*opt_arg != ':')
 972                 return (opt_arg);
 973         opt_arg++;
 974         instance = -1;
 975         targ = -1;
 976         done = FALSE;
 977         /*
 978          * Restore separator that may be in
 979          * the middle of our option argument.
 980          */
 981         tok_end = strchr(opt_arg, '\0');
 982         if (tok_end < end)
 983                 *tok_end = ',';
 984         while (!done) {
 985                 switch (*opt_arg) {
 986                 case '{':
 987                         if (instance == -1) {
 988                                 instance = 0;
 989                         } else {
 990                                 if (depth > 1) {
 991                                         if (targ == -1)
 992                                                 targ = 0;
 993                                 } else {
 994                                         printf("Malformed Option %s\n",
 995                                                opt_name);
 996                                         done = TRUE;
 997                                 }
 998                         }
 999                         opt_arg++;
1000                         break;
1001                 case '}':
1002                         if (targ != -1)
1003                                 targ = -1;
1004                         else if (instance != -1)
1005                                 instance = -1;
1006                         opt_arg++;
1007                         break;
1008                 case ',':
1009                 case '.':
1010                         if (instance == -1)
1011                                 done = TRUE;
1012                         else if (targ >= 0)
1013                                 targ++;
1014                         else if (instance >= 0)
1015                                 instance++;
1016                         opt_arg++;
1017                         break;
1018                 case '\0':
1019                         done = TRUE;
1020                         break;
1021                 default:
1022                         tok_end = end;
1023                         for (i = 0; tok_list[i]; i++) {
1024                                 tok_end2 = strchr(opt_arg, tok_list[i]);
1025                                 if ((tok_end2) && (tok_end2 < tok_end))
1026                                         tok_end = tok_end2;
1027                         }
1028                         callback(callback_arg, instance, targ,
1029                                  simple_strtol(opt_arg, NULL, 0));
1030                         opt_arg = tok_end;
1031                         break;
1032                 }
1033         }
1034         return (opt_arg);
1035 }
1036
1037 /*
1038  * Handle Linux boot parameters. This routine allows for assigning a value
1039  * to a parameter with a ':' between the parameter and the value.
1040  * ie. aic79xx=stpwlev:1,extended
1041  */
1042 static int
1043 aic79xx_setup(char *s)
1044 {
1045         int     i, n;
1046         char   *p;
1047         char   *end;
1048
1049         static struct {
1050                 const char *name;
1051                 uint32_t *flag;
1052         } options[] = {
1053                 { "extended", &aic79xx_extended },
1054                 { "no_reset", &aic79xx_no_reset },
1055                 { "verbose", &aic79xx_verbose },
1056                 { "allow_memio", &aic79xx_allow_memio},
1057 #ifdef AHD_DEBUG
1058                 { "debug", &ahd_debug },
1059 #endif
1060                 { "reverse_scan", &aic79xx_reverse_scan },
1061                 { "periodic_otag", &aic79xx_periodic_otag },
1062                 { "pci_parity", &aic79xx_pci_parity },
1063                 { "seltime", &aic79xx_seltime },
1064                 { "tag_info", NULL },
1065                 { "global_tag_depth", NULL},
1066                 { "slewrate", NULL },
1067                 { "precomp", NULL },
1068                 { "amplitude", NULL },
1069                 { "slowcrc", &aic79xx_slowcrc },
1070         };
1071
1072         end = strchr(s, '\0');
1073
1074         /*
1075          * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1076          * will never be 0 in this case.
1077          */
1078         n = 0;
1079
1080         while ((p = strsep(&s, ",.")) != NULL) {
1081                 if (*p == '\0')
1082                         continue;
1083                 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1084
1085                         n = strlen(options[i].name);
1086                         if (strncmp(options[i].name, p, n) == 0)
1087                                 break;
1088                 }
1089                 if (i == NUM_ELEMENTS(options))
1090                         continue;
1091
1092                 if (strncmp(p, "global_tag_depth", n) == 0) {
1093                         ahd_linux_setup_tag_info_global(p + n);
1094                 } else if (strncmp(p, "tag_info", n) == 0) {
1095                         s = ahd_parse_brace_option("tag_info", p + n, end,
1096                             2, ahd_linux_setup_tag_info, 0);
1097                 } else if (strncmp(p, "slewrate", n) == 0) {
1098                         s = ahd_parse_brace_option("slewrate",
1099                             p + n, end, 1, ahd_linux_setup_iocell_info,
1100                             AIC79XX_SLEWRATE_INDEX);
1101                 } else if (strncmp(p, "precomp", n) == 0) {
1102                         s = ahd_parse_brace_option("precomp",
1103                             p + n, end, 1, ahd_linux_setup_iocell_info,
1104                             AIC79XX_PRECOMP_INDEX);
1105                 } else if (strncmp(p, "amplitude", n) == 0) {
1106                         s = ahd_parse_brace_option("amplitude",
1107                             p + n, end, 1, ahd_linux_setup_iocell_info,
1108                             AIC79XX_AMPLITUDE_INDEX);
1109                 } else if (p[n] == ':') {
1110                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1111                 } else if (!strncmp(p, "verbose", n)) {
1112                         *(options[i].flag) = 1;
1113                 } else {
1114                         *(options[i].flag) ^= 0xFFFFFFFF;
1115                 }
1116         }
1117         return 1;
1118 }
1119
1120 __setup("aic79xx=", aic79xx_setup);
1121
1122 uint32_t aic79xx_verbose;
1123
1124 int
1125 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1126 {
1127         char    buf[80];
1128         struct  Scsi_Host *host;
1129         char    *new_name;
1130         u_long  s;
1131         int     retval;
1132
1133         template->name = ahd->description;
1134         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1135         if (host == NULL)
1136                 return (ENOMEM);
1137
1138         *((struct ahd_softc **)host->hostdata) = ahd;
1139         ahd->platform_data->host = host;
1140         host->can_queue = AHD_MAX_QUEUE;
1141         host->cmd_per_lun = 2;
1142         host->sg_tablesize = AHD_NSEG;
1143         host->this_id = ahd->our_id;
1144         host->irq = ahd->platform_data->irq;
1145         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1146         host->max_lun = AHD_NUM_LUNS;
1147         host->max_channel = 0;
1148         host->sg_tablesize = AHD_NSEG;
1149         ahd_lock(ahd, &s);
1150         ahd_set_unit(ahd, ahd_linux_unit++);
1151         ahd_unlock(ahd, &s);
1152         sprintf(buf, "scsi%d", host->host_no);
1153         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1154         if (new_name != NULL) {
1155                 strcpy(new_name, buf);
1156                 ahd_set_name(ahd, new_name);
1157         }
1158         host->unique_id = ahd->unit;
1159         ahd_linux_initialize_scsi_bus(ahd);
1160         ahd_intr_enable(ahd, TRUE);
1161
1162         host->transportt = ahd_linux_transport_template;
1163
1164         retval = scsi_add_host(host, &ahd->dev_softc->dev);
1165         if (retval) {
1166                 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1167                 scsi_host_put(host);
1168                 return retval;
1169         }
1170
1171         scsi_scan_host(host);
1172         return 0;
1173 }
1174
1175 uint64_t
1176 ahd_linux_get_memsize(void)
1177 {
1178         struct sysinfo si;
1179
1180         si_meminfo(&si);
1181         return ((uint64_t)si.totalram << PAGE_SHIFT);
1182 }
1183
1184 /*
1185  * Place the SCSI bus into a known state by either resetting it,
1186  * or forcing transfer negotiations on the next command to any
1187  * target.
1188  */
1189 static void
1190 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1191 {
1192         u_int target_id;
1193         u_int numtarg;
1194         unsigned long s;
1195
1196         target_id = 0;
1197         numtarg = 0;
1198
1199         if (aic79xx_no_reset != 0)
1200                 ahd->flags &= ~AHD_RESET_BUS_A;
1201
1202         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1203                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1204         else
1205                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1206
1207         ahd_lock(ahd, &s);
1208
1209         /*
1210          * Force negotiation to async for all targets that
1211          * will not see an initial bus reset.
1212          */
1213         for (; target_id < numtarg; target_id++) {
1214                 struct ahd_devinfo devinfo;
1215                 struct ahd_initiator_tinfo *tinfo;
1216                 struct ahd_tmode_tstate *tstate;
1217
1218                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1219                                             target_id, &tstate);
1220                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1221                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1222                 ahd_update_neg_request(ahd, &devinfo, tstate,
1223                                        tinfo, AHD_NEG_ALWAYS);
1224         }
1225         ahd_unlock(ahd, &s);
1226         /* Give the bus some time to recover */
1227         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1228                 ahd_freeze_simq(ahd);
1229                 msleep(AIC79XX_RESET_DELAY);
1230                 ahd_release_simq(ahd);
1231         }
1232 }
1233
1234 int
1235 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1236 {
1237         ahd->platform_data =
1238             malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1239         if (ahd->platform_data == NULL)
1240                 return (ENOMEM);
1241         memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1242         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1243         ahd_lockinit(ahd);
1244         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1245         return (0);
1246 }
1247
1248 void
1249 ahd_platform_free(struct ahd_softc *ahd)
1250 {
1251         struct scsi_target *starget;
1252         int i, j;
1253
1254         if (ahd->platform_data != NULL) {
1255                 /* destroy all of the device and target objects */
1256                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1257                         starget = ahd->platform_data->starget[i];
1258                         if (starget != NULL) {
1259                                 for (j = 0; j < AHD_NUM_LUNS; j++) {
1260                                         struct ahd_linux_target *targ =
1261                                                 scsi_transport_target_data(starget);
1262                                         if (targ->sdev[j] == NULL)
1263                                                 continue;
1264                                         targ->sdev[j] = NULL;
1265                                 }
1266                                 ahd->platform_data->starget[i] = NULL;
1267                         }
1268                 }
1269
1270                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1271                         free_irq(ahd->platform_data->irq, ahd);
1272                 if (ahd->tags[0] == BUS_SPACE_PIO
1273                  && ahd->bshs[0].ioport != 0)
1274                         release_region(ahd->bshs[0].ioport, 256);
1275                 if (ahd->tags[1] == BUS_SPACE_PIO
1276                  && ahd->bshs[1].ioport != 0)
1277                         release_region(ahd->bshs[1].ioport, 256);
1278                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1279                  && ahd->bshs[0].maddr != NULL) {
1280                         iounmap(ahd->bshs[0].maddr);
1281                         release_mem_region(ahd->platform_data->mem_busaddr,
1282                                            0x1000);
1283                 }
1284                 if (ahd->platform_data->host)
1285                         scsi_host_put(ahd->platform_data->host);
1286
1287                 free(ahd->platform_data, M_DEVBUF);
1288         }
1289 }
1290
1291 void
1292 ahd_platform_init(struct ahd_softc *ahd)
1293 {
1294         /*
1295          * Lookup and commit any modified IO Cell options.
1296          */
1297         if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1298                 struct ahd_linux_iocell_opts *iocell_opts;
1299
1300                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1301                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1302                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1303                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1304                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1305                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1306                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1307         }
1308
1309 }
1310
1311 void
1312 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1313 {
1314         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1315                                 SCB_GET_CHANNEL(ahd, scb),
1316                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1317                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1318 }
1319
1320 void
1321 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1322                       ahd_queue_alg alg)
1323 {
1324         struct scsi_target *starget;
1325         struct ahd_linux_target *targ;
1326         struct ahd_linux_device *dev;
1327         struct scsi_device *sdev;
1328         int was_queuing;
1329         int now_queuing;
1330
1331         starget = ahd->platform_data->starget[devinfo->target];
1332         targ = scsi_transport_target_data(starget);
1333         BUG_ON(targ == NULL);
1334         sdev = targ->sdev[devinfo->lun];
1335         if (sdev == NULL)
1336                 return;
1337
1338         dev = scsi_transport_device_data(sdev);
1339
1340         if (dev == NULL)
1341                 return;
1342         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1343         switch (alg) {
1344         default:
1345         case AHD_QUEUE_NONE:
1346                 now_queuing = 0;
1347                 break;
1348         case AHD_QUEUE_BASIC:
1349                 now_queuing = AHD_DEV_Q_BASIC;
1350                 break;
1351         case AHD_QUEUE_TAGGED:
1352                 now_queuing = AHD_DEV_Q_TAGGED;
1353                 break;
1354         }
1355         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1356          && (was_queuing != now_queuing)
1357          && (dev->active != 0)) {
1358                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1359                 dev->qfrozen++;
1360         }
1361
1362         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1363         if (now_queuing) {
1364                 u_int usertags;
1365
1366                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1367                 if (!was_queuing) {
1368                         /*
1369                          * Start out agressively and allow our
1370                          * dynamic queue depth algorithm to take
1371                          * care of the rest.
1372                          */
1373                         dev->maxtags = usertags;
1374                         dev->openings = dev->maxtags - dev->active;
1375                 }
1376                 if (dev->maxtags == 0) {
1377                         /*
1378                          * Queueing is disabled by the user.
1379                          */
1380                         dev->openings = 1;
1381                 } else if (alg == AHD_QUEUE_TAGGED) {
1382                         dev->flags |= AHD_DEV_Q_TAGGED;
1383                         if (aic79xx_periodic_otag != 0)
1384                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1385                 } else
1386                         dev->flags |= AHD_DEV_Q_BASIC;
1387         } else {
1388                 /* We can only have one opening. */
1389                 dev->maxtags = 0;
1390                 dev->openings =  1 - dev->active;
1391         }
1392
1393         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1394         case AHD_DEV_Q_BASIC:
1395                 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1396                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1397                 break;
1398         case AHD_DEV_Q_TAGGED:
1399                 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1400                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1401                 break;
1402         default:
1403                 /*
1404                  * We allow the OS to queue 2 untagged transactions to
1405                  * us at any time even though we can only execute them
1406                  * serially on the controller/device.  This should
1407                  * remove some latency.
1408                  */
1409                 scsi_deactivate_tcq(sdev, 1);
1410                 break;
1411         }
1412 }
1413
1414 int
1415 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1416                         int lun, u_int tag, role_t role, uint32_t status)
1417 {
1418         return 0;
1419 }
1420
1421 static u_int
1422 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1423 {
1424         static int warned_user;
1425         u_int tags;
1426
1427         tags = 0;
1428         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1429                 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
1430
1431                         if (warned_user == 0) {
1432                                 printf(KERN_WARNING
1433 "aic79xx: WARNING: Insufficient tag_info instances\n"
1434 "aic79xx: for installed controllers.  Using defaults\n"
1435 "aic79xx: Please update the aic79xx_tag_info array in\n"
1436 "aic79xx: the aic79xx_osm.c source file.\n");
1437                                 warned_user++;
1438                         }
1439                         tags = AHD_MAX_QUEUE;
1440                 } else {
1441                         adapter_tag_info_t *tag_info;
1442
1443                         tag_info = &aic79xx_tag_info[ahd->unit];
1444                         tags = tag_info->tag_commands[devinfo->target_offset];
1445                         if (tags > AHD_MAX_QUEUE)
1446                                 tags = AHD_MAX_QUEUE;
1447                 }
1448         }
1449         return (tags);
1450 }
1451
1452 /*
1453  * Determines the queue depth for a given device.
1454  */
1455 static void
1456 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1457 {
1458         struct  ahd_devinfo devinfo;
1459         u_int   tags;
1460         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1461
1462         ahd_compile_devinfo(&devinfo,
1463                             ahd->our_id,
1464                             sdev->sdev_target->id, sdev->lun,
1465                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1466                             ROLE_INITIATOR);
1467         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1468         if (tags != 0 && sdev->tagged_supported != 0) {
1469
1470                 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
1471                 ahd_print_devinfo(ahd, &devinfo);
1472                 printf("Tagged Queuing enabled.  Depth %d\n", tags);
1473         } else {
1474                 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
1475         }
1476 }
1477
1478 static int
1479 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1480                       struct scsi_cmnd *cmd)
1481 {
1482         struct   scb *scb;
1483         struct   hardware_scb *hscb;
1484         struct   ahd_initiator_tinfo *tinfo;
1485         struct   ahd_tmode_tstate *tstate;
1486         u_int    col_idx;
1487         uint16_t mask;
1488         unsigned long flags;
1489
1490         ahd_lock(ahd, &flags);
1491
1492         /*
1493          * Get an scb to use.
1494          */
1495         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1496                                     cmd->device->id, &tstate);
1497         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1498          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1499                 col_idx = AHD_NEVER_COL_IDX;
1500         } else {
1501                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1502                                             cmd->device->lun);
1503         }
1504         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1505                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1506                 ahd_unlock(ahd, &flags);
1507                 return SCSI_MLQUEUE_HOST_BUSY;
1508         }
1509
1510         scb->io_ctx = cmd;
1511         scb->platform_data->dev = dev;
1512         hscb = scb->hscb;
1513         cmd->host_scribble = (char *)scb;
1514
1515         /*
1516          * Fill out basics of the HSCB.
1517          */
1518         hscb->control = 0;
1519         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1520         hscb->lun = cmd->device->lun;
1521         scb->hscb->task_management = 0;
1522         mask = SCB_GET_TARGET_MASK(ahd, scb);
1523
1524         if ((ahd->user_discenable & mask) != 0)
1525                 hscb->control |= DISCENB;
1526
1527         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1528                 scb->flags |= SCB_PACKETIZED;
1529
1530         if ((tstate->auto_negotiate & mask) != 0) {
1531                 scb->flags |= SCB_AUTO_NEGOTIATE;
1532                 scb->hscb->control |= MK_MESSAGE;
1533         }
1534
1535         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1536                 int     msg_bytes;
1537                 uint8_t tag_msgs[2];
1538
1539                 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1540                 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1541                         hscb->control |= tag_msgs[0];
1542                         if (tag_msgs[0] == MSG_ORDERED_TASK)
1543                                 dev->commands_since_idle_or_otag = 0;
1544                 } else
1545                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1546                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1547                         hscb->control |= MSG_ORDERED_TASK;
1548                         dev->commands_since_idle_or_otag = 0;
1549                 } else {
1550                         hscb->control |= MSG_SIMPLE_TASK;
1551                 }
1552         }
1553
1554         hscb->cdb_len = cmd->cmd_len;
1555         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1556
1557         scb->platform_data->xfer_len = 0;
1558         ahd_set_residual(scb, 0);
1559         ahd_set_sense_residual(scb, 0);
1560         scb->sg_count = 0;
1561         if (cmd->use_sg != 0) {
1562                 void    *sg;
1563                 struct   scatterlist *cur_seg;
1564                 u_int    nseg;
1565                 int      dir;
1566
1567                 cur_seg = (struct scatterlist *)cmd->request_buffer;
1568                 dir = cmd->sc_data_direction;
1569                 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1570                                   cmd->use_sg, dir);
1571                 scb->platform_data->xfer_len = 0;
1572                 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1573                         dma_addr_t addr;
1574                         bus_size_t len;
1575
1576                         addr = sg_dma_address(cur_seg);
1577                         len = sg_dma_len(cur_seg);
1578                         scb->platform_data->xfer_len += len;
1579                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1580                                           /*last*/nseg == 1);
1581                 }
1582         } else if (cmd->request_bufflen != 0) {
1583                 void *sg;
1584                 dma_addr_t addr;
1585                 int dir;
1586
1587                 sg = scb->sg_list;
1588                 dir = cmd->sc_data_direction;
1589                 addr = pci_map_single(ahd->dev_softc,
1590                                       cmd->request_buffer,
1591                                       cmd->request_bufflen, dir);
1592                 scb->platform_data->xfer_len = cmd->request_bufflen;
1593                 scb->platform_data->buf_busaddr = addr;
1594                 sg = ahd_sg_setup(ahd, scb, sg, addr,
1595                                   cmd->request_bufflen, /*last*/TRUE);
1596         }
1597
1598         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1599         dev->openings--;
1600         dev->active++;
1601         dev->commands_issued++;
1602
1603         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1604                 dev->commands_since_idle_or_otag++;
1605         scb->flags |= SCB_ACTIVE;
1606         ahd_queue_scb(ahd, scb);
1607
1608         ahd_unlock(ahd, &flags);
1609
1610         return 0;
1611 }
1612
1613 /*
1614  * SCSI controller interrupt handler.
1615  */
1616 irqreturn_t
1617 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1618 {
1619         struct  ahd_softc *ahd;
1620         u_long  flags;
1621         int     ours;
1622
1623         ahd = (struct ahd_softc *) dev_id;
1624         ahd_lock(ahd, &flags);
1625         ours = ahd_intr(ahd);
1626         ahd_unlock(ahd, &flags);
1627         return IRQ_RETVAL(ours);
1628 }
1629
1630 void
1631 ahd_send_async(struct ahd_softc *ahd, char channel,
1632                u_int target, u_int lun, ac_code code, void *arg)
1633 {
1634         switch (code) {
1635         case AC_TRANSFER_NEG:
1636         {
1637                 char    buf[80];
1638                 struct  scsi_target *starget;
1639                 struct  info_str info;
1640                 struct  ahd_initiator_tinfo *tinfo;
1641                 struct  ahd_tmode_tstate *tstate;
1642                 unsigned int target_ppr_options;
1643
1644                 BUG_ON(target == CAM_TARGET_WILDCARD);
1645
1646                 info.buffer = buf;
1647                 info.length = sizeof(buf);
1648                 info.offset = 0;
1649                 info.pos = 0;
1650                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1651                                             target, &tstate);
1652
1653                 /*
1654                  * Don't bother reporting results while
1655                  * negotiations are still pending.
1656                  */
1657                 if (tinfo->curr.period != tinfo->goal.period
1658                  || tinfo->curr.width != tinfo->goal.width
1659                  || tinfo->curr.offset != tinfo->goal.offset
1660                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1661                         if (bootverbose == 0)
1662                                 break;
1663
1664                 /*
1665                  * Don't bother reporting results that
1666                  * are identical to those last reported.
1667                  */
1668                 starget = ahd->platform_data->starget[target];
1669                 if (starget == NULL)
1670                         break;
1671
1672                 target_ppr_options =
1673                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1674                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1675                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1676                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1677                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1678                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1679                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1680                         + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1681
1682                 if (tinfo->curr.period == spi_period(starget)
1683                     && tinfo->curr.width == spi_width(starget)
1684                     && tinfo->curr.offset == spi_offset(starget)
1685                  && tinfo->curr.ppr_options == target_ppr_options)
1686                         if (bootverbose == 0)
1687                                 break;
1688
1689                 spi_period(starget) = tinfo->curr.period;
1690                 spi_width(starget) = tinfo->curr.width;
1691                 spi_offset(starget) = tinfo->curr.offset;
1692                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1693                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1694                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1695                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1696                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1697                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1698                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1699                 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1700                 spi_display_xfer_agreement(starget);
1701                 break;
1702         }
1703         case AC_SENT_BDR:
1704         {
1705                 WARN_ON(lun != CAM_LUN_WILDCARD);
1706                 scsi_report_device_reset(ahd->platform_data->host,
1707                                          channel - 'A', target);
1708                 break;
1709         }
1710         case AC_BUS_RESET:
1711                 if (ahd->platform_data->host != NULL) {
1712                         scsi_report_bus_reset(ahd->platform_data->host,
1713                                               channel - 'A');
1714                 }
1715                 break;
1716         default:
1717                 panic("ahd_send_async: Unexpected async event");
1718         }
1719 }
1720
1721 /*
1722  * Calls the higher level scsi done function and frees the scb.
1723  */
1724 void
1725 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1726 {
1727         struct scsi_cmnd *cmd;
1728         struct    ahd_linux_device *dev;
1729
1730         if ((scb->flags & SCB_ACTIVE) == 0) {
1731                 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1732                 ahd_dump_card_state(ahd);
1733                 panic("Stopping for safety");
1734         }
1735         LIST_REMOVE(scb, pending_links);
1736         cmd = scb->io_ctx;
1737         dev = scb->platform_data->dev;
1738         dev->active--;
1739         dev->openings++;
1740         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1741                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1742                 dev->qfrozen--;
1743         }
1744         ahd_linux_unmap_scb(ahd, scb);
1745
1746         /*
1747          * Guard against stale sense data.
1748          * The Linux mid-layer assumes that sense
1749          * was retrieved anytime the first byte of
1750          * the sense buffer looks "sane".
1751          */
1752         cmd->sense_buffer[0] = 0;
1753         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1754                 uint32_t amount_xferred;
1755
1756                 amount_xferred =
1757                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1758                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1759 #ifdef AHD_DEBUG
1760                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1761                                 ahd_print_path(ahd, scb);
1762                                 printf("Set CAM_UNCOR_PARITY\n");
1763                         }
1764 #endif
1765                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1766 #ifdef AHD_REPORT_UNDERFLOWS
1767                 /*
1768                  * This code is disabled by default as some
1769                  * clients of the SCSI system do not properly
1770                  * initialize the underflow parameter.  This
1771                  * results in spurious termination of commands
1772                  * that complete as expected (e.g. underflow is
1773                  * allowed as command can return variable amounts
1774                  * of data.
1775                  */
1776                 } else if (amount_xferred < scb->io_ctx->underflow) {
1777                         u_int i;
1778
1779                         ahd_print_path(ahd, scb);
1780                         printf("CDB:");
1781                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1782                                 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1783                         printf("\n");
1784                         ahd_print_path(ahd, scb);
1785                         printf("Saw underflow (%ld of %ld bytes). "
1786                                "Treated as error\n",
1787                                 ahd_get_residual(scb),
1788                                 ahd_get_transfer_length(scb));
1789                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1790 #endif
1791                 } else {
1792                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1793                 }
1794         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1795                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1796         }
1797
1798         if (dev->openings == 1
1799          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1800          && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1801                 dev->tag_success_count++;
1802         /*
1803          * Some devices deal with temporary internal resource
1804          * shortages by returning queue full.  When the queue
1805          * full occurrs, we throttle back.  Slowly try to get
1806          * back to our previous queue depth.
1807          */
1808         if ((dev->openings + dev->active) < dev->maxtags
1809          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1810                 dev->tag_success_count = 0;
1811                 dev->openings++;
1812         }
1813
1814         if (dev->active == 0)
1815                 dev->commands_since_idle_or_otag = 0;
1816
1817         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1818                 printf("Recovery SCB completes\n");
1819                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1820                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1821                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1822
1823                 if (ahd->platform_data->eh_done)
1824                         complete(ahd->platform_data->eh_done);
1825         }
1826
1827         ahd_free_scb(ahd, scb);
1828         ahd_linux_queue_cmd_complete(ahd, cmd);
1829 }
1830
1831 static void
1832 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1833                              struct scsi_device *sdev, struct scb *scb)
1834 {
1835         struct  ahd_devinfo devinfo;
1836         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1837
1838         ahd_compile_devinfo(&devinfo,
1839                             ahd->our_id,
1840                             sdev->sdev_target->id, sdev->lun,
1841                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1842                             ROLE_INITIATOR);
1843
1844         /*
1845          * We don't currently trust the mid-layer to
1846          * properly deal with queue full or busy.  So,
1847          * when one occurs, we tell the mid-layer to
1848          * unconditionally requeue the command to us
1849          * so that we can retry it ourselves.  We also
1850          * implement our own throttling mechanism so
1851          * we don't clobber the device with too many
1852          * commands.
1853          */
1854         switch (ahd_get_scsi_status(scb)) {
1855         default:
1856                 break;
1857         case SCSI_STATUS_CHECK_COND:
1858         case SCSI_STATUS_CMD_TERMINATED:
1859         {
1860                 struct scsi_cmnd *cmd;
1861
1862                 /*
1863                  * Copy sense information to the OS's cmd
1864                  * structure if it is available.
1865                  */
1866                 cmd = scb->io_ctx;
1867                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1868                         struct scsi_status_iu_header *siu;
1869                         u_int sense_size;
1870                         u_int sense_offset;
1871
1872                         if (scb->flags & SCB_SENSE) {
1873                                 sense_size = MIN(sizeof(struct scsi_sense_data)
1874                                                - ahd_get_sense_residual(scb),
1875                                                  sizeof(cmd->sense_buffer));
1876                                 sense_offset = 0;
1877                         } else {
1878                                 /*
1879                                  * Copy only the sense data into the provided
1880                                  * buffer.
1881                                  */
1882                                 siu = (struct scsi_status_iu_header *)
1883                                     scb->sense_data;
1884                                 sense_size = MIN(scsi_4btoul(siu->sense_length),
1885                                                 sizeof(cmd->sense_buffer));
1886                                 sense_offset = SIU_SENSE_OFFSET(siu);
1887                         }
1888
1889                         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1890                         memcpy(cmd->sense_buffer,
1891                                ahd_get_sense_buf(ahd, scb)
1892                                + sense_offset, sense_size);
1893                         cmd->result |= (DRIVER_SENSE << 24);
1894
1895 #ifdef AHD_DEBUG
1896                         if (ahd_debug & AHD_SHOW_SENSE) {
1897                                 int i;
1898
1899                                 printf("Copied %d bytes of sense data at %d:",
1900                                        sense_size, sense_offset);
1901                                 for (i = 0; i < sense_size; i++) {
1902                                         if ((i & 0xF) == 0)
1903                                                 printf("\n");
1904                                         printf("0x%x ", cmd->sense_buffer[i]);
1905                                 }
1906                                 printf("\n");
1907                         }
1908 #endif
1909                 }
1910                 break;
1911         }
1912         case SCSI_STATUS_QUEUE_FULL:
1913                 /*
1914                  * By the time the core driver has returned this
1915                  * command, all other commands that were queued
1916                  * to us but not the device have been returned.
1917                  * This ensures that dev->active is equal to
1918                  * the number of commands actually queued to
1919                  * the device.
1920                  */
1921                 dev->tag_success_count = 0;
1922                 if (dev->active != 0) {
1923                         /*
1924                          * Drop our opening count to the number
1925                          * of commands currently outstanding.
1926                          */
1927                         dev->openings = 0;
1928 #ifdef AHD_DEBUG
1929                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1930                                 ahd_print_path(ahd, scb);
1931                                 printf("Dropping tag count to %d\n",
1932                                        dev->active);
1933                         }
1934 #endif
1935                         if (dev->active == dev->tags_on_last_queuefull) {
1936
1937                                 dev->last_queuefull_same_count++;
1938                                 /*
1939                                  * If we repeatedly see a queue full
1940                                  * at the same queue depth, this
1941                                  * device has a fixed number of tag
1942                                  * slots.  Lock in this tag depth
1943                                  * so we stop seeing queue fulls from
1944                                  * this device.
1945                                  */
1946                                 if (dev->last_queuefull_same_count
1947                                  == AHD_LOCK_TAGS_COUNT) {
1948                                         dev->maxtags = dev->active;
1949                                         ahd_print_path(ahd, scb);
1950                                         printf("Locking max tag count at %d\n",
1951                                                dev->active);
1952                                 }
1953                         } else {
1954                                 dev->tags_on_last_queuefull = dev->active;
1955                                 dev->last_queuefull_same_count = 0;
1956                         }
1957                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1958                         ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1959                         ahd_platform_set_tags(ahd, &devinfo,
1960                                      (dev->flags & AHD_DEV_Q_BASIC)
1961                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1962                         break;
1963                 }
1964                 /*
1965                  * Drop down to a single opening, and treat this
1966                  * as if the target returned BUSY SCSI status.
1967                  */
1968                 dev->openings = 1;
1969                 ahd_platform_set_tags(ahd, &devinfo,
1970                              (dev->flags & AHD_DEV_Q_BASIC)
1971                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1972                 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1973         }
1974 }
1975
1976 static void
1977 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1978 {
1979         int status;
1980         int new_status = DID_OK;
1981         int do_fallback = 0;
1982         int scsi_status;
1983
1984         /*
1985          * Map CAM error codes into Linux Error codes.  We
1986          * avoid the conversion so that the DV code has the
1987          * full error information available when making
1988          * state change decisions.
1989          */
1990
1991         status = ahd_cmd_get_transaction_status(cmd);
1992         switch (status) {
1993         case CAM_REQ_INPROG:
1994         case CAM_REQ_CMP:
1995                 new_status = DID_OK;
1996                 break;
1997         case CAM_AUTOSENSE_FAIL:
1998                 new_status = DID_ERROR;
1999                 /* Fallthrough */
2000         case CAM_SCSI_STATUS_ERROR:
2001                 scsi_status = ahd_cmd_get_scsi_status(cmd);
2002
2003                 switch(scsi_status) {
2004                 case SCSI_STATUS_CMD_TERMINATED:
2005                 case SCSI_STATUS_CHECK_COND:
2006                         if ((cmd->result >> 24) != DRIVER_SENSE) {
2007                                 do_fallback = 1;
2008                         } else {
2009                                 struct scsi_sense_data *sense;
2010
2011                                 sense = (struct scsi_sense_data *)
2012                                         &cmd->sense_buffer;
2013                                 if (sense->extra_len >= 5 &&
2014                                     (sense->add_sense_code == 0x47
2015                                      || sense->add_sense_code == 0x48))
2016                                         do_fallback = 1;
2017                         }
2018                         break;
2019                 default:
2020                         break;
2021                 }
2022                 break;
2023         case CAM_REQ_ABORTED:
2024                 new_status = DID_ABORT;
2025                 break;
2026         case CAM_BUSY:
2027                 new_status = DID_BUS_BUSY;
2028                 break;
2029         case CAM_REQ_INVALID:
2030         case CAM_PATH_INVALID:
2031                 new_status = DID_BAD_TARGET;
2032                 break;
2033         case CAM_SEL_TIMEOUT:
2034                 new_status = DID_NO_CONNECT;
2035                 break;
2036         case CAM_SCSI_BUS_RESET:
2037         case CAM_BDR_SENT:
2038                 new_status = DID_RESET;
2039                 break;
2040         case CAM_UNCOR_PARITY:
2041                 new_status = DID_PARITY;
2042                 do_fallback = 1;
2043                 break;
2044         case CAM_CMD_TIMEOUT:
2045                 new_status = DID_TIME_OUT;
2046                 do_fallback = 1;
2047                 break;
2048         case CAM_REQ_CMP_ERR:
2049         case CAM_UNEXP_BUSFREE:
2050         case CAM_DATA_RUN_ERR:
2051                 new_status = DID_ERROR;
2052                 do_fallback = 1;
2053                 break;
2054         case CAM_UA_ABORT:
2055         case CAM_NO_HBA:
2056         case CAM_SEQUENCE_FAIL:
2057         case CAM_CCB_LEN_ERR:
2058         case CAM_PROVIDE_FAIL:
2059         case CAM_REQ_TERMIO:
2060         case CAM_UNREC_HBA_ERROR:
2061         case CAM_REQ_TOO_BIG:
2062                 new_status = DID_ERROR;
2063                 break;
2064         case CAM_REQUEUE_REQ:
2065                 new_status = DID_REQUEUE;
2066                 break;
2067         default:
2068                 /* We should never get here */
2069                 new_status = DID_ERROR;
2070                 break;
2071         }
2072
2073         if (do_fallback) {
2074                 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2075                        ahd_name(ahd), status, cmd->device->channel,
2076                        cmd->device->id, cmd->device->lun);
2077         }
2078
2079         ahd_cmd_set_transaction_status(cmd, new_status);
2080
2081         cmd->scsi_done(cmd);
2082 }
2083
2084 void
2085 ahd_freeze_simq(struct ahd_softc *ahd)
2086 {
2087         scsi_block_requests(ahd->platform_data->host);
2088 }
2089
2090 void
2091 ahd_release_simq(struct ahd_softc *ahd)
2092 {
2093         scsi_unblock_requests(ahd->platform_data->host);
2094 }
2095
2096 static int
2097 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2098 {
2099         struct ahd_softc *ahd;
2100         struct ahd_linux_device *dev;
2101         struct scb *pending_scb;
2102         u_int  saved_scbptr;
2103         u_int  active_scbptr;
2104         u_int  last_phase;
2105         u_int  saved_scsiid;
2106         u_int  cdb_byte;
2107         int    retval;
2108         int    was_paused;
2109         int    paused;
2110         int    wait;
2111         int    disconnected;
2112         ahd_mode_state saved_modes;
2113         unsigned long flags;
2114
2115         pending_scb = NULL;
2116         paused = FALSE;
2117         wait = FALSE;
2118         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2119
2120         scmd_printk(KERN_INFO, cmd,
2121                     "Attempting to queue an ABORT message:");
2122
2123         printf("CDB:");
2124         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2125                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2126         printf("\n");
2127
2128         ahd_lock(ahd, &flags);
2129
2130         /*
2131          * First determine if we currently own this command.
2132          * Start by searching the device queue.  If not found
2133          * there, check the pending_scb list.  If not found
2134          * at all, and the system wanted us to just abort the
2135          * command, return success.
2136          */
2137         dev = scsi_transport_device_data(cmd->device);
2138
2139         if (dev == NULL) {
2140                 /*
2141                  * No target device for this command exists,
2142                  * so we must not still own the command.
2143                  */
2144                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2145                 retval = SUCCESS;
2146                 goto no_cmd;
2147         }
2148
2149         /*
2150          * See if we can find a matching cmd in the pending list.
2151          */
2152         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2153                 if (pending_scb->io_ctx == cmd)
2154                         break;
2155         }
2156
2157         if (pending_scb == NULL) {
2158                 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2159                 goto no_cmd;
2160         }
2161
2162         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2163                 /*
2164                  * We can't queue two recovery actions using the same SCB
2165                  */
2166                 retval = FAILED;
2167                 goto  done;
2168         }
2169
2170         /*
2171          * Ensure that the card doesn't do anything
2172          * behind our back.  Also make sure that we
2173          * didn't "just" miss an interrupt that would
2174          * affect this cmd.
2175          */
2176         was_paused = ahd_is_paused(ahd);
2177         ahd_pause_and_flushwork(ahd);
2178         paused = TRUE;
2179
2180         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2181                 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2182                 goto no_cmd;
2183         }
2184
2185         printf("%s: At time of recovery, card was %spaused\n",
2186                ahd_name(ahd), was_paused ? "" : "not ");
2187         ahd_dump_card_state(ahd);
2188
2189         disconnected = TRUE;
2190         if (ahd_search_qinfifo(ahd, cmd->device->id,
2191                                cmd->device->channel + 'A',
2192                                cmd->device->lun,
2193                                pending_scb->hscb->tag,
2194                                ROLE_INITIATOR, CAM_REQ_ABORTED,
2195                                SEARCH_COMPLETE) > 0) {
2196                 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2197                        ahd_name(ahd), cmd->device->channel,
2198                        cmd->device->id, cmd->device->lun);
2199                 retval = SUCCESS;
2200                 goto done;
2201         }
2202
2203         saved_modes = ahd_save_modes(ahd);
2204         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2205         last_phase = ahd_inb(ahd, LASTPHASE);
2206         saved_scbptr = ahd_get_scbptr(ahd);
2207         active_scbptr = saved_scbptr;
2208         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2209                 struct scb *bus_scb;
2210
2211                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2212                 if (bus_scb == pending_scb)
2213                         disconnected = FALSE;
2214         }
2215
2216         /*
2217          * At this point, pending_scb is the scb associated with the
2218          * passed in command.  That command is currently active on the
2219          * bus or is in the disconnected state.
2220          */
2221         saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2222         if (last_phase != P_BUSFREE
2223             && SCB_GET_TAG(pending_scb) == active_scbptr) {
2224
2225                 /*
2226                  * We're active on the bus, so assert ATN
2227                  * and hope that the target responds.
2228                  */
2229                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2230                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2231                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2232                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2233                 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2234                 wait = TRUE;
2235         } else if (disconnected) {
2236
2237                 /*
2238                  * Actually re-queue this SCB in an attempt
2239                  * to select the device before it reconnects.
2240                  */
2241                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2242                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2243                 pending_scb->hscb->cdb_len = 0;
2244                 pending_scb->hscb->task_attribute = 0;
2245                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2246
2247                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2248                         /*
2249                          * Mark the SCB has having an outstanding
2250                          * task management function.  Should the command
2251                          * complete normally before the task management
2252                          * function can be sent, the host will be notified
2253                          * to abort our requeued SCB.
2254                          */
2255                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2256                                  pending_scb->hscb->task_management);
2257                 } else {
2258                         /*
2259                          * If non-packetized, set the MK_MESSAGE control
2260                          * bit indicating that we desire to send a message.
2261                          * We also set the disconnected flag since there is
2262                          * no guarantee that our SCB control byte matches
2263                          * the version on the card.  We don't want the
2264                          * sequencer to abort the command thinking an
2265                          * unsolicited reselection occurred.
2266                          */
2267                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2268
2269                         /*
2270                          * The sequencer will never re-reference the
2271                          * in-core SCB.  To make sure we are notified
2272                          * during reslection, set the MK_MESSAGE flag in
2273                          * the card's copy of the SCB.
2274                          */
2275                         ahd_outb(ahd, SCB_CONTROL,
2276                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2277                 }
2278
2279                 /*
2280                  * Clear out any entries in the QINFIFO first
2281                  * so we are the next SCB for this target
2282                  * to run.
2283                  */
2284                 ahd_search_qinfifo(ahd, cmd->device->id,
2285                                    cmd->device->channel + 'A', cmd->device->lun,
2286                                    SCB_LIST_NULL, ROLE_INITIATOR,
2287                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2288                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2289                 ahd_set_scbptr(ahd, saved_scbptr);
2290                 ahd_print_path(ahd, pending_scb);
2291                 printf("Device is disconnected, re-queuing SCB\n");
2292                 wait = TRUE;
2293         } else {
2294                 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2295                 retval = FAILED;
2296                 goto done;
2297         }
2298
2299 no_cmd:
2300         /*
2301          * Our assumption is that if we don't have the command, no
2302          * recovery action was required, so we return success.  Again,
2303          * the semantics of the mid-layer recovery engine are not
2304          * well defined, so this may change in time.
2305          */
2306         retval = SUCCESS;
2307 done:
2308         if (paused)
2309                 ahd_unpause(ahd);
2310         if (wait) {
2311                 DECLARE_COMPLETION(done);
2312
2313                 ahd->platform_data->eh_done = &done;
2314                 ahd_unlock(ahd, &flags);
2315
2316                 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2317                 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2318                         ahd_lock(ahd, &flags);
2319                         ahd->platform_data->eh_done = NULL;
2320                         ahd_unlock(ahd, &flags);
2321                         printf("%s: Timer Expired (active %d)\n",
2322                                ahd_name(ahd), dev->active);
2323                         retval = FAILED;
2324                 }
2325                 printf("Recovery code awake\n");
2326         } else
2327                 ahd_unlock(ahd, &flags);
2328
2329         if (retval != SUCCESS)
2330                 printf("%s: Command abort returning 0x%x\n",
2331                        ahd_name(ahd), retval);
2332
2333         return retval;
2334 }
2335
2336 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2337 {
2338         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2339         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2340         struct ahd_devinfo devinfo;
2341         unsigned long flags;
2342
2343         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2344                             starget->channel + 'A', ROLE_INITIATOR);
2345         ahd_lock(ahd, &flags);
2346         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2347         ahd_unlock(ahd, &flags);
2348 }
2349
2350 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2351 {
2352         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2353         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2354         struct ahd_tmode_tstate *tstate;
2355         struct ahd_initiator_tinfo *tinfo
2356                 = ahd_fetch_transinfo(ahd,
2357                                       starget->channel + 'A',
2358                                       shost->this_id, starget->id, &tstate);
2359         struct ahd_devinfo devinfo;
2360         unsigned int ppr_options = tinfo->goal.ppr_options;
2361         unsigned int dt;
2362         unsigned long flags;
2363         unsigned long offset = tinfo->goal.offset;
2364
2365 #ifdef AHD_DEBUG
2366         if ((ahd_debug & AHD_SHOW_DV) != 0)
2367                 printf("%s: set period to %d\n", ahd_name(ahd), period);
2368 #endif
2369         if (offset == 0)
2370                 offset = MAX_OFFSET;
2371
2372         if (period < 8)
2373                 period = 8;
2374         if (period < 10) {
2375                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2376                 if (period == 8)
2377                         ppr_options |= MSG_EXT_PPR_IU_REQ;
2378         }
2379
2380         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2381
2382         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2383                             starget->channel + 'A', ROLE_INITIATOR);
2384
2385         /* all PPR requests apart from QAS require wide transfers */
2386         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2387                 if (spi_width(starget) == 0)
2388                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2389         }
2390
2391         ahd_find_syncrate(ahd, &period, &ppr_options,
2392                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2393
2394         ahd_lock(ahd, &flags);
2395         ahd_set_syncrate(ahd, &devinfo, period, offset,
2396                          ppr_options, AHD_TRANS_GOAL, FALSE);
2397         ahd_unlock(ahd, &flags);
2398 }
2399
2400 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2401 {
2402         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2403         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2404         struct ahd_tmode_tstate *tstate;
2405         struct ahd_initiator_tinfo *tinfo
2406                 = ahd_fetch_transinfo(ahd,
2407                                       starget->channel + 'A',
2408                                       shost->this_id, starget->id, &tstate);
2409         struct ahd_devinfo devinfo;
2410         unsigned int ppr_options = 0;
2411         unsigned int period = 0;
2412         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2413         unsigned long flags;
2414
2415 #ifdef AHD_DEBUG
2416         if ((ahd_debug & AHD_SHOW_DV) != 0)
2417                 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2418 #endif
2419
2420         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2421                             starget->channel + 'A', ROLE_INITIATOR);
2422         if (offset != 0) {
2423                 period = tinfo->goal.period;
2424                 ppr_options = tinfo->goal.ppr_options;
2425                 ahd_find_syncrate(ahd, &period, &ppr_options,
2426                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2427         }
2428
2429         ahd_lock(ahd, &flags);
2430         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2431                          AHD_TRANS_GOAL, FALSE);
2432         ahd_unlock(ahd, &flags);
2433 }
2434
2435 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2436 {
2437         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2438         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2439         struct ahd_tmode_tstate *tstate;
2440         struct ahd_initiator_tinfo *tinfo
2441                 = ahd_fetch_transinfo(ahd,
2442                                       starget->channel + 'A',
2443                                       shost->this_id, starget->id, &tstate);
2444         struct ahd_devinfo devinfo;
2445         unsigned int ppr_options = tinfo->goal.ppr_options
2446                 & ~MSG_EXT_PPR_DT_REQ;
2447         unsigned int period = tinfo->goal.period;
2448         unsigned int width = tinfo->goal.width;
2449         unsigned long flags;
2450
2451 #ifdef AHD_DEBUG
2452         if ((ahd_debug & AHD_SHOW_DV) != 0)
2453                 printf("%s: %s DT\n", ahd_name(ahd),
2454                        dt ? "enabling" : "disabling");
2455 #endif
2456         if (dt) {
2457                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2458                 if (!width)
2459                         ahd_linux_set_width(starget, 1);
2460         } else {
2461                 if (period <= 9)
2462                         period = 10; /* If resetting DT, period must be >= 25ns */
2463                 /* IU is invalid without DT set */
2464                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2465         }
2466         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2467                             starget->channel + 'A', ROLE_INITIATOR);
2468         ahd_find_syncrate(ahd, &period, &ppr_options,
2469                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2470
2471         ahd_lock(ahd, &flags);
2472         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2473                          ppr_options, AHD_TRANS_GOAL, FALSE);
2474         ahd_unlock(ahd, &flags);
2475 }
2476
2477 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2478 {
2479         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2480         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2481         struct ahd_tmode_tstate *tstate;
2482         struct ahd_initiator_tinfo *tinfo
2483                 = ahd_fetch_transinfo(ahd,
2484                                       starget->channel + 'A',
2485                                       shost->this_id, starget->id, &tstate);
2486         struct ahd_devinfo devinfo;
2487         unsigned int ppr_options = tinfo->goal.ppr_options
2488                 & ~MSG_EXT_PPR_QAS_REQ;
2489         unsigned int period = tinfo->goal.period;
2490         unsigned int dt;
2491         unsigned long flags;
2492
2493 #ifdef AHD_DEBUG
2494         if ((ahd_debug & AHD_SHOW_DV) != 0)
2495                 printf("%s: %s QAS\n", ahd_name(ahd),
2496                        qas ? "enabling" : "disabling");
2497 #endif
2498
2499         if (qas) {
2500                 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2501         }
2502
2503         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2504
2505         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2506                             starget->channel + 'A', ROLE_INITIATOR);
2507         ahd_find_syncrate(ahd, &period, &ppr_options,
2508                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2509
2510         ahd_lock(ahd, &flags);
2511         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2512                          ppr_options, AHD_TRANS_GOAL, FALSE);
2513         ahd_unlock(ahd, &flags);
2514 }
2515
2516 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2517 {
2518         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2519         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2520         struct ahd_tmode_tstate *tstate;
2521         struct ahd_initiator_tinfo *tinfo
2522                 = ahd_fetch_transinfo(ahd,
2523                                       starget->channel + 'A',
2524                                       shost->this_id, starget->id, &tstate);
2525         struct ahd_devinfo devinfo;
2526         unsigned int ppr_options = tinfo->goal.ppr_options
2527                 & ~MSG_EXT_PPR_IU_REQ;
2528         unsigned int period = tinfo->goal.period;
2529         unsigned int dt;
2530         unsigned long flags;
2531
2532 #ifdef AHD_DEBUG
2533         if ((ahd_debug & AHD_SHOW_DV) != 0)
2534                 printf("%s: %s IU\n", ahd_name(ahd),
2535                        iu ? "enabling" : "disabling");
2536 #endif
2537
2538         if (iu) {
2539                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2540                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2541         }
2542
2543         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2544
2545         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2546                             starget->channel + 'A', ROLE_INITIATOR);
2547         ahd_find_syncrate(ahd, &period, &ppr_options,
2548                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2549
2550         ahd_lock(ahd, &flags);
2551         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2552                          ppr_options, AHD_TRANS_GOAL, FALSE);
2553         ahd_unlock(ahd, &flags);
2554 }
2555
2556 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2557 {
2558         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2559         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2560         struct ahd_tmode_tstate *tstate;
2561         struct ahd_initiator_tinfo *tinfo
2562                 = ahd_fetch_transinfo(ahd,
2563                                       starget->channel + 'A',
2564                                       shost->this_id, starget->id, &tstate);
2565         struct ahd_devinfo devinfo;
2566         unsigned int ppr_options = tinfo->goal.ppr_options
2567                 & ~MSG_EXT_PPR_RD_STRM;
2568         unsigned int period = tinfo->goal.period;
2569         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2570         unsigned long flags;
2571
2572 #ifdef AHD_DEBUG
2573         if ((ahd_debug & AHD_SHOW_DV) != 0)
2574                 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2575                        rdstrm  ? "enabling" : "disabling");
2576 #endif
2577
2578         if (rdstrm)
2579                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2580
2581         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2582                             starget->channel + 'A', ROLE_INITIATOR);
2583         ahd_find_syncrate(ahd, &period, &ppr_options,
2584                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2585
2586         ahd_lock(ahd, &flags);
2587         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2588                          ppr_options, AHD_TRANS_GOAL, FALSE);
2589         ahd_unlock(ahd, &flags);
2590 }
2591
2592 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2593 {
2594         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2595         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2596         struct ahd_tmode_tstate *tstate;
2597         struct ahd_initiator_tinfo *tinfo
2598                 = ahd_fetch_transinfo(ahd,
2599                                       starget->channel + 'A',
2600                                       shost->this_id, starget->id, &tstate);
2601         struct ahd_devinfo devinfo;
2602         unsigned int ppr_options = tinfo->goal.ppr_options
2603                 & ~MSG_EXT_PPR_WR_FLOW;
2604         unsigned int period = tinfo->goal.period;
2605         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2606         unsigned long flags;
2607
2608 #ifdef AHD_DEBUG
2609         if ((ahd_debug & AHD_SHOW_DV) != 0)
2610                 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2611                        wrflow ? "enabling" : "disabling");
2612 #endif
2613
2614         if (wrflow)
2615                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2616
2617         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2618                             starget->channel + 'A', ROLE_INITIATOR);
2619         ahd_find_syncrate(ahd, &period, &ppr_options,
2620                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2621
2622         ahd_lock(ahd, &flags);
2623         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2624                          ppr_options, AHD_TRANS_GOAL, FALSE);
2625         ahd_unlock(ahd, &flags);
2626 }
2627
2628 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2629 {
2630         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2631         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2632         struct ahd_tmode_tstate *tstate;
2633         struct ahd_initiator_tinfo *tinfo
2634                 = ahd_fetch_transinfo(ahd,
2635                                       starget->channel + 'A',
2636                                       shost->this_id, starget->id, &tstate);
2637         struct ahd_devinfo devinfo;
2638         unsigned int ppr_options = tinfo->goal.ppr_options
2639                 & ~MSG_EXT_PPR_RTI;
2640         unsigned int period = tinfo->goal.period;
2641         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2642         unsigned long flags;
2643
2644         if ((ahd->features & AHD_RTI) == 0) {
2645 #ifdef AHD_DEBUG
2646                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2647                         printf("%s: RTI not available\n", ahd_name(ahd));
2648 #endif
2649                 return;
2650         }
2651
2652 #ifdef AHD_DEBUG
2653         if ((ahd_debug & AHD_SHOW_DV) != 0)
2654                 printf("%s: %s RTI\n", ahd_name(ahd),
2655                        rti ? "enabling" : "disabling");
2656 #endif
2657
2658         if (rti)
2659                 ppr_options |= MSG_EXT_PPR_RTI;
2660
2661         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2662                             starget->channel + 'A', ROLE_INITIATOR);
2663         ahd_find_syncrate(ahd, &period, &ppr_options,
2664                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2665
2666         ahd_lock(ahd, &flags);
2667         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2668                          ppr_options, AHD_TRANS_GOAL, FALSE);
2669         ahd_unlock(ahd, &flags);
2670 }
2671
2672 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2673 {
2674         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2675         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2676         struct ahd_tmode_tstate *tstate;
2677         struct ahd_initiator_tinfo *tinfo
2678                 = ahd_fetch_transinfo(ahd,
2679                                       starget->channel + 'A',
2680                                       shost->this_id, starget->id, &tstate);
2681         struct ahd_devinfo devinfo;
2682         unsigned int ppr_options = tinfo->goal.ppr_options
2683                 & ~MSG_EXT_PPR_PCOMP_EN;
2684         unsigned int period = tinfo->goal.period;
2685         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2686         unsigned long flags;
2687
2688 #ifdef AHD_DEBUG
2689         if ((ahd_debug & AHD_SHOW_DV) != 0)
2690                 printf("%s: %s Precompensation\n", ahd_name(ahd),
2691                        pcomp ? "Enable" : "Disable");
2692 #endif
2693
2694         if (pcomp)
2695                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2696
2697         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2698                             starget->channel + 'A', ROLE_INITIATOR);
2699         ahd_find_syncrate(ahd, &period, &ppr_options,
2700                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2701
2702         ahd_lock(ahd, &flags);
2703         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2704                          ppr_options, AHD_TRANS_GOAL, FALSE);
2705         ahd_unlock(ahd, &flags);
2706 }
2707
2708 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2709 {
2710         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2711         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2712         struct ahd_tmode_tstate *tstate;
2713         struct ahd_initiator_tinfo *tinfo
2714                 = ahd_fetch_transinfo(ahd,
2715                                       starget->channel + 'A',
2716                                       shost->this_id, starget->id, &tstate);
2717         struct ahd_devinfo devinfo;
2718         unsigned int ppr_options = tinfo->goal.ppr_options
2719                 & ~MSG_EXT_PPR_HOLD_MCS;
2720         unsigned int period = tinfo->goal.period;
2721         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2722         unsigned long flags;
2723
2724         if (hold)
2725                 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2726
2727         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2728                             starget->channel + 'A', ROLE_INITIATOR);
2729         ahd_find_syncrate(ahd, &period, &ppr_options,
2730                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2731
2732         ahd_lock(ahd, &flags);
2733         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2734                          ppr_options, AHD_TRANS_GOAL, FALSE);
2735         ahd_unlock(ahd, &flags);
2736 }
2737
2738
2739
2740 static struct spi_function_template ahd_linux_transport_functions = {
2741         .set_offset     = ahd_linux_set_offset,
2742         .show_offset    = 1,
2743         .set_period     = ahd_linux_set_period,
2744         .show_period    = 1,
2745         .set_width      = ahd_linux_set_width,
2746         .show_width     = 1,
2747         .set_dt         = ahd_linux_set_dt,
2748         .show_dt        = 1,
2749         .set_iu         = ahd_linux_set_iu,
2750         .show_iu        = 1,
2751         .set_qas        = ahd_linux_set_qas,
2752         .show_qas       = 1,
2753         .set_rd_strm    = ahd_linux_set_rd_strm,
2754         .show_rd_strm   = 1,
2755         .set_wr_flow    = ahd_linux_set_wr_flow,
2756         .show_wr_flow   = 1,
2757         .set_rti        = ahd_linux_set_rti,
2758         .show_rti       = 1,
2759         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2760         .show_pcomp_en  = 1,
2761         .set_hold_mcs   = ahd_linux_set_hold_mcs,
2762         .show_hold_mcs  = 1,
2763 };
2764
2765 static int __init
2766 ahd_linux_init(void)
2767 {
2768         int     error = 0;
2769
2770         /*
2771          * If we've been passed any parameters, process them now.
2772          */
2773         if (aic79xx)
2774                 aic79xx_setup(aic79xx);
2775
2776         ahd_linux_transport_template =
2777                 spi_attach_transport(&ahd_linux_transport_functions);
2778         if (!ahd_linux_transport_template)
2779                 return -ENODEV;
2780
2781         scsi_transport_reserve_target(ahd_linux_transport_template,
2782                                       sizeof(struct ahd_linux_target));
2783         scsi_transport_reserve_device(ahd_linux_transport_template,
2784                                       sizeof(struct ahd_linux_device));
2785
2786         error = ahd_linux_pci_init();
2787         if (error)
2788                 spi_release_transport(ahd_linux_transport_template);
2789         return error;
2790 }
2791
2792 static void __exit
2793 ahd_linux_exit(void)
2794 {
2795         ahd_linux_pci_exit();
2796         spi_release_transport(ahd_linux_transport_template);
2797 }
2798
2799 module_init(ahd_linux_init);
2800 module_exit(ahd_linux_exit);