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 const struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
 197 {
 198         AIC79XX_DEFAULT_IOOPTS,
 199         AIC79XX_DEFAULT_IOOPTS,
 200         AIC79XX_DEFAULT_IOOPTS,
 201         AIC79XX_DEFAULT_IOOPTS,
 202         AIC79XX_DEFAULT_IOOPTS,
 203         AIC79XX_DEFAULT_IOOPTS,
 204         AIC79XX_DEFAULT_IOOPTS,
 205         AIC79XX_DEFAULT_IOOPTS,
 206         AIC79XX_DEFAULT_IOOPTS,
 207         AIC79XX_DEFAULT_IOOPTS,
 208         AIC79XX_DEFAULT_IOOPTS,
 209         AIC79XX_DEFAULT_IOOPTS,
 210         AIC79XX_DEFAULT_IOOPTS,
 211         AIC79XX_DEFAULT_IOOPTS,
 212         AIC79XX_DEFAULT_IOOPTS,
 213         AIC79XX_DEFAULT_IOOPTS
 214 };
 215
 216 /*
 217  * There should be a specific return value for this in scsi.h, but
 218  * it seems that most drivers ignore it.
 219  */
 220 #define DID_UNDERFLOW   DID_ERROR
 221
 222 void
 223 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
 224 {
 225         printk("(scsi%d:%c:%d:%d): ",
 226                ahd->platform_data->host->host_no,
 227                scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
 228                scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
 229                scb != NULL ? SCB_GET_LUN(scb) : -1);
 230 }
 231
 232 /*
 233  * XXX - these options apply unilaterally to _all_ adapters
 234  *       cards in the system.  This should be fixed.  Exceptions to this
 235  *       rule are noted in the comments.
 236  */
 237
 238 /*
 239  * Skip the scsi bus reset.  Non 0 make us skip the reset at startup.  This
 240  * has no effect on any later resets that might occur due to things like
 241  * SCSI bus timeouts.
 242  */
 243 static uint32_t aic79xx_no_reset;
 244
 245 /*
 246  * Should we force EXTENDED translation on a controller.
 247  *     0 == Use whatever is in the SEEPROM or default to off
 248  *     1 == Use whatever is in the SEEPROM or default to on
 249  */
 250 static uint32_t aic79xx_extended;
 251
 252 /*
 253  * PCI bus parity checking of the Adaptec controllers.  This is somewhat
 254  * dubious at best.  To my knowledge, this option has never actually
 255  * solved a PCI parity problem, but on certain machines with broken PCI
 256  * chipset configurations, it can generate tons of false error messages.
 257  * It's included in the driver for completeness.
 258  *   0     = Shut off PCI parity check
 259  *   non-0 = Enable PCI parity check
 260  *
 261  * NOTE: you can't actually pass -1 on the lilo prompt.  So, to set this
 262  * variable to -1 you would actually want to simply pass the variable
 263  * name without a number.  That will invert the 0 which will result in
 264  * -1.
 265  */
 266 static uint32_t aic79xx_pci_parity = ~0;
 267
 268 /*
 269  * There are lots of broken chipsets in the world.  Some of them will
 270  * violate the PCI spec when we issue byte sized memory writes to our
 271  * controller.  I/O mapped register access, if allowed by the given
 272  * platform, will work in almost all cases.
 273  */
 274 uint32_t aic79xx_allow_memio = ~0;
 275
 276 /*
 277  * So that we can set how long each device is given as a selection timeout.
 278  * The table of values goes like this:
 279  *   0 - 256ms
 280  *   1 - 128ms
 281  *   2 - 64ms
 282  *   3 - 32ms
 283  * We default to 256ms because some older devices need a longer time
 284  * to respond to initial selection.
 285  */
 286 static uint32_t aic79xx_seltime;
 287
 288 /*
 289  * Certain devices do not perform any aging on commands.  Should the
 290  * device be saturated by commands in one portion of the disk, it is
 291  * possible for transactions on far away sectors to never be serviced.
 292  * To handle these devices, we can periodically send an ordered tag to
 293  * force all outstanding transactions to be serviced prior to a new
 294  * transaction.
 295  */
 296 static uint32_t aic79xx_periodic_otag;
 297
 298 /* Some storage boxes are using an LSI chip which has a bug making it
 299  * impossible to use aic79xx Rev B chip in 320 speeds.  The following
 300  * storage boxes have been reported to be buggy:
 301  * EonStor 3U 16-Bay: U16U-G3A3
 302  * EonStor 2U 12-Bay: U12U-G3A3
 303  * SentinelRAID: 2500F R5 / R6
 304  * SentinelRAID: 2500F R1
 305  * SentinelRAID: 2500F/1500F
 306  * SentinelRAID: 150F
 307  *
 308  * To get around this LSI bug, you can set your board to 160 mode
 309  * or you can enable the SLOWCRC bit.
 310  */
 311 uint32_t aic79xx_slowcrc;
 312
 313 /*
 314  * Module information and settable options.
 315  */
 316 static char *aic79xx = NULL;
 317
 318 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
 319 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
 320 MODULE_LICENSE("Dual BSD/GPL");
 321 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
 322 module_param(aic79xx, charp, 0444);
 323 MODULE_PARM_DESC(aic79xx,
 324 "period-delimited options string:\n"
 325 "       verbose                 Enable verbose/diagnostic logging\n"
 326 "       allow_memio             Allow device registers to be memory mapped\n"
 327 "       debug                   Bitmask of debug values to enable\n"
 328 "       no_reset                Suppress initial bus resets\n"
 329 "       extended                Enable extended geometry on all controllers\n"
 330 "       periodic_otag           Send an ordered tagged transaction\n"
 331 "                               periodically to prevent tag starvation.\n"
 332 "                               This may be required by some older disk\n"
 333 "                               or drives/RAID arrays.\n"
 334 "       tag_info:<tag_str>      Set per-target tag depth\n"
 335 "       global_tag_depth:<int>  Global tag depth for all targets on all buses\n"
 336 "       slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
 337 "       precomp:<pcomp_list>    Set the signal precompensation (0-7).\n"
 338 "       amplitude:<int>         Set the signal amplitude (0-7).\n"
 339 "       seltime:<int>           Selection Timeout:\n"
 340 "                               (0/256ms,1/128ms,2/64ms,3/32ms)\n"
 341 "       slowcrc                 Turn on the SLOWCRC bit (Rev B only)\n"
 342 "\n"
 343 "       Sample /etc/modprobe.conf line:\n"
 344 "               Enable verbose logging\n"
 345 "               Set tag depth on Controller 2/Target 2 to 10 tags\n"
 346 "               Shorten the selection timeout to 128ms\n"
 347 "\n"
 348 "       options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
 349 );
 350
 351 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
 352                                          struct scsi_device *,
 353                                          struct scb *);
 354 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
 355                                          struct scsi_cmnd *cmd);
 356 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
 357 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
 358 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
 359                                      struct ahd_devinfo *devinfo);
 360 static void ahd_linux_device_queue_depth(struct scsi_device *);
 361 static int ahd_linux_run_command(struct ahd_softc*,
 362                                  struct ahd_linux_device *,
 363                                  struct scsi_cmnd *);
 364 static void ahd_linux_setup_tag_info_global(char *p);
 365 static int  aic79xx_setup(char *c);
 366 static void ahd_freeze_simq(struct ahd_softc *ahd);
 367 static void ahd_release_simq(struct ahd_softc *ahd);
 368
 369 static int ahd_linux_unit;
 370
 371
 372 /************************** OS Utility Wrappers *******************************/
 373 void ahd_delay(long);
 374 void
 375 ahd_delay(long usec)
 376 {
 377         /*
 378          * udelay on Linux can have problems for
 379          * multi-millisecond waits.  Wait at most
 380          * 1024us per call.
 381          */
 382         while (usec > 0) {
 383                 udelay(usec % 1024);
 384                 usec -= 1024;
 385         }
 386 }
 387
 388
 389 /***************************** Low Level I/O **********************************/
 390 uint8_t ahd_inb(struct ahd_softc * ahd, long port);
 391 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
 392 void ahd_outw_atomic(struct ahd_softc * ahd,
 393                                      long port, uint16_t val);
 394 void ahd_outsb(struct ahd_softc * ahd, long port,
 395                                uint8_t *, int count);
 396 void ahd_insb(struct ahd_softc * ahd, long port,
 397                                uint8_t *, int count);
 398
 399 uint8_t
 400 ahd_inb(struct ahd_softc * ahd, long port)
 401 {
 402         uint8_t x;
 403
 404         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 405                 x = readb(ahd->bshs[0].maddr + port);
 406         } else {
 407                 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
 408         }
 409         mb();
 410         return (x);
 411 }
 412
 413 #if 0 /* unused */
 414 static uint16_t
 415 ahd_inw_atomic(struct ahd_softc * ahd, long port)
 416 {
 417         uint8_t x;
 418
 419         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 420                 x = readw(ahd->bshs[0].maddr + port);
 421         } else {
 422                 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
 423         }
 424         mb();
 425         return (x);
 426 }
 427 #endif
 428
 429 void
 430 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
 431 {
 432         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 433                 writeb(val, ahd->bshs[0].maddr + port);
 434         } else {
 435                 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
 436         }
 437         mb();
 438 }
 439
 440 void
 441 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
 442 {
 443         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 444                 writew(val, ahd->bshs[0].maddr + port);
 445         } else {
 446                 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
 447         }
 448         mb();
 449 }
 450
 451 void
 452 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
 453 {
 454         int i;
 455
 456         /*
 457          * There is probably a more efficient way to do this on Linux
 458          * but we don't use this for anything speed critical and this
 459          * should work.
 460          */
 461         for (i = 0; i < count; i++)
 462                 ahd_outb(ahd, port, *array++);
 463 }
 464
 465 void
 466 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
 467 {
 468         int i;
 469
 470         /*
 471          * There is probably a more efficient way to do this on Linux
 472          * but we don't use this for anything speed critical and this
 473          * should work.
 474          */
 475         for (i = 0; i < count; i++)
 476                 *array++ = ahd_inb(ahd, port);
 477 }
 478
 479 /******************************* PCI Routines *********************************/
 480 uint32_t
 481 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
 482 {
 483         switch (width) {
 484         case 1:
 485         {
 486                 uint8_t retval;
 487
 488                 pci_read_config_byte(pci, reg, &retval);
 489                 return (retval);
 490         }
 491         case 2:
 492         {
 493                 uint16_t retval;
 494                 pci_read_config_word(pci, reg, &retval);
 495                 return (retval);
 496         }
 497         case 4:
 498         {
 499                 uint32_t retval;
 500                 pci_read_config_dword(pci, reg, &retval);
 501                 return (retval);
 502         }
 503         default:
 504                 panic("ahd_pci_read_config: Read size too big");
 505                 /* NOTREACHED */
 506                 return (0);
 507         }
 508 }
 509
 510 void
 511 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
 512 {
 513         switch (width) {
 514         case 1:
 515                 pci_write_config_byte(pci, reg, value);
 516                 break;
 517         case 2:
 518                 pci_write_config_word(pci, reg, value);
 519                 break;
 520         case 4:
 521                 pci_write_config_dword(pci, reg, value);
 522                 break;
 523         default:
 524                 panic("ahd_pci_write_config: Write size too big");
 525                 /* NOTREACHED */
 526         }
 527 }
 528
 529 /****************************** Inlines ***************************************/
 530 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
 531
 532 static void
 533 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
 534 {
 535         struct scsi_cmnd *cmd;
 536
 537         cmd = scb->io_ctx;
 538         ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
 539         scsi_dma_unmap(cmd);
 540 }
 541
 542 /******************************** Macros **************************************/
 543 #define BUILD_SCSIID(ahd, cmd)                                          \
 544         (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
 545
 546 /*
 547  * Return a string describing the driver.
 548  */
 549 static const char *
 550 ahd_linux_info(struct Scsi_Host *host)
 551 {
 552         static char buffer[512];
 553         char    ahd_info[256];
 554         char   *bp;
 555         struct ahd_softc *ahd;
 556
 557         bp = &buffer[0];
 558         ahd = *(struct ahd_softc **)host->hostdata;
 559         memset(bp, 0, sizeof(buffer));
 560         strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
 561                         "        <");
 562         strcat(bp, ahd->description);
 563         strcat(bp, ">\n"
 564                         "        ");
 565         ahd_controller_info(ahd, ahd_info);
 566         strcat(bp, ahd_info);
 567
 568         return (bp);
 569 }
 570
 571 /*
 572  * Queue an SCB to the controller.
 573  */
 574 static int
 575 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 576 {
 577         struct   ahd_softc *ahd;
 578         struct   ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
 579         int rtn = SCSI_MLQUEUE_HOST_BUSY;
 580
 581         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 582
 583         cmd->scsi_done = scsi_done;
 584         cmd->result = CAM_REQ_INPROG << 16;
 585         rtn = ahd_linux_run_command(ahd, dev, cmd);
 586
 587         return rtn;
 588 }
 589
 590 static struct scsi_target **
 591 ahd_linux_target_in_softc(struct scsi_target *starget)
 592 {
 593         struct  ahd_softc *ahd =
 594                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 595         unsigned int target_offset;
 596
 597         target_offset = starget->id;
 598         if (starget->channel != 0)
 599                 target_offset += 8;
 600
 601         return &ahd->platform_data->starget[target_offset];
 602 }
 603
 604 static int
 605 ahd_linux_target_alloc(struct scsi_target *starget)
 606 {
 607         struct  ahd_softc *ahd =
 608                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 609         struct seeprom_config *sc = ahd->seep_config;
 610         unsigned long flags;
 611         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 612         struct ahd_devinfo devinfo;
 613         struct ahd_initiator_tinfo *tinfo;
 614         struct ahd_tmode_tstate *tstate;
 615         char channel = starget->channel + 'A';
 616
 617         ahd_lock(ahd, &flags);
 618
 619         BUG_ON(*ahd_targp != NULL);
 620
 621         *ahd_targp = starget;
 622
 623         if (sc) {
 624                 int flags = sc->device_flags[starget->id];
 625
 626                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 627                                             starget->id, &tstate);
 628
 629                 if ((flags  & CFPACKETIZED) == 0) {
 630                         /* don't negotiate packetized (IU) transfers */
 631                         spi_max_iu(starget) = 0;
 632                 } else {
 633                         if ((ahd->features & AHD_RTI) == 0)
 634                                 spi_rti(starget) = 0;
 635                 }
 636
 637                 if ((flags & CFQAS) == 0)
 638                         spi_max_qas(starget) = 0;
 639
 640                 /* Transinfo values have been set to BIOS settings */
 641                 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
 642                 spi_min_period(starget) = tinfo->user.period;
 643                 spi_max_offset(starget) = tinfo->user.offset;
 644         }
 645
 646         tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
 647                                     starget->id, &tstate);
 648         ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
 649                             CAM_LUN_WILDCARD, channel,
 650                             ROLE_INITIATOR);
 651         ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
 652                          AHD_TRANS_GOAL, /*paused*/FALSE);
 653         ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
 654                       AHD_TRANS_GOAL, /*paused*/FALSE);
 655         ahd_unlock(ahd, &flags);
 656
 657         return 0;
 658 }
 659
 660 static void
 661 ahd_linux_target_destroy(struct scsi_target *starget)
 662 {
 663         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 664
 665         *ahd_targp = NULL;
 666 }
 667
 668 static int
 669 ahd_linux_slave_alloc(struct scsi_device *sdev)
 670 {
 671         struct  ahd_softc *ahd =
 672                 *((struct ahd_softc **)sdev->host->hostdata);
 673         struct ahd_linux_device *dev;
 674
 675         if (bootverbose)
 676                 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
 677
 678         dev = scsi_transport_device_data(sdev);
 679         memset(dev, 0, sizeof(*dev));
 680
 681         /*
 682          * We start out life using untagged
 683          * transactions of which we allow one.
 684          */
 685         dev->openings = 1;
 686
 687         /*
 688          * Set maxtags to 0.  This will be changed if we
 689          * later determine that we are dealing with
 690          * a tagged queuing capable device.
 691          */
 692         dev->maxtags = 0;
 693
 694         return (0);
 695 }
 696
 697 static int
 698 ahd_linux_slave_configure(struct scsi_device *sdev)
 699 {
 700         struct  ahd_softc *ahd;
 701
 702         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 703         if (bootverbose)
 704                 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
 705
 706         ahd_linux_device_queue_depth(sdev);
 707
 708         /* Initial Domain Validation */
 709         if (!spi_initial_dv(sdev->sdev_target))
 710                 spi_dv_device(sdev);
 711
 712         return 0;
 713 }
 714
 715 #if defined(__i386__)
 716 /*
 717  * Return the disk geometry for the given SCSI device.
 718  */
 719 static int
 720 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 721                     sector_t capacity, int geom[])
 722 {
 723         uint8_t *bh;
 724         int      heads;
 725         int      sectors;
 726         int      cylinders;
 727         int      ret;
 728         int      extended;
 729         struct   ahd_softc *ahd;
 730
 731         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 732
 733         bh = scsi_bios_ptable(bdev);
 734         if (bh) {
 735                 ret = scsi_partsize(bh, capacity,
 736                                     &geom[2], &geom[0], &geom[1]);
 737                 kfree(bh);
 738                 if (ret != -1)
 739                         return (ret);
 740         }
 741         heads = 64;
 742         sectors = 32;
 743         cylinders = aic_sector_div(capacity, heads, sectors);
 744
 745         if (aic79xx_extended != 0)
 746                 extended = 1;
 747         else
 748                 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
 749         if (extended && cylinders >= 1024) {
 750                 heads = 255;
 751                 sectors = 63;
 752                 cylinders = aic_sector_div(capacity, heads, sectors);
 753         }
 754         geom[0] = heads;
 755         geom[1] = sectors;
 756         geom[2] = cylinders;
 757         return (0);
 758 }
 759 #endif
 760
 761 /*
 762  * Abort the current SCSI command(s).
 763  */
 764 static int
 765 ahd_linux_abort(struct scsi_cmnd *cmd)
 766 {
 767         int error;
 768
 769         error = ahd_linux_queue_abort_cmd(cmd);
 770
 771         return error;
 772 }
 773
 774 /*
 775  * Attempt to send a target reset message to the device that timed out.
 776  */
 777 static int
 778 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
 779 {
 780         struct ahd_softc *ahd;
 781         struct ahd_linux_device *dev;
 782         struct scb *reset_scb;
 783         u_int  cdb_byte;
 784         int    retval = SUCCESS;
 785         int    paused;
 786         int    wait;
 787         struct  ahd_initiator_tinfo *tinfo;
 788         struct  ahd_tmode_tstate *tstate;
 789         unsigned long flags;
 790         DECLARE_COMPLETION_ONSTACK(done);
 791
 792         reset_scb = NULL;
 793         paused = FALSE;
 794         wait = FALSE;
 795         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 796
 797         scmd_printk(KERN_INFO, cmd,
 798                     "Attempting to queue a TARGET RESET message:");
 799
 800         printf("CDB:");
 801         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
 802                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
 803         printf("\n");
 804
 805         /*
 806          * Determine if we currently own this command.
 807          */
 808         dev = scsi_transport_device_data(cmd->device);
 809
 810         if (dev == NULL) {
 811                 /*
 812                  * No target device for this command exists,
 813                  * so we must not still own the command.
 814                  */
 815                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
 816                 return SUCCESS;
 817         }
 818
 819         /*
 820          * Generate us a new SCB
 821          */
 822         reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
 823         if (!reset_scb) {
 824                 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
 825                 return FAILED;
 826         }
 827
 828         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 829                                     cmd->device->id, &tstate);
 830         reset_scb->io_ctx = cmd;
 831         reset_scb->platform_data->dev = dev;
 832         reset_scb->sg_count = 0;
 833         ahd_set_residual(reset_scb, 0);
 834         ahd_set_sense_residual(reset_scb, 0);
 835         reset_scb->platform_data->xfer_len = 0;
 836         reset_scb->hscb->control = 0;
 837         reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
 838         reset_scb->hscb->lun = cmd->device->lun;
 839         reset_scb->hscb->cdb_len = 0;
 840         reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
 841         reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
 842         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 843                 reset_scb->flags |= SCB_PACKETIZED;
 844         } else {
 845                 reset_scb->hscb->control |= MK_MESSAGE;
 846         }
 847         dev->openings--;
 848         dev->active++;
 849         dev->commands_issued++;
 850
 851         ahd_lock(ahd, &flags);
 852
 853         LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
 854         ahd_queue_scb(ahd, reset_scb);
 855
 856         ahd->platform_data->eh_done = &done;
 857         ahd_unlock(ahd, &flags);
 858
 859         printf("%s: Device reset code sleeping\n", ahd_name(ahd));
 860         if (!wait_for_completion_timeout(&done, 5 * HZ)) {
 861                 ahd_lock(ahd, &flags);
 862                 ahd->platform_data->eh_done = NULL;
 863                 ahd_unlock(ahd, &flags);
 864                 printf("%s: Device reset timer expired (active %d)\n",
 865                        ahd_name(ahd), dev->active);
 866                 retval = FAILED;
 867         }
 868         printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
 869
 870         return (retval);
 871 }
 872
 873 /*
 874  * Reset the SCSI bus.
 875  */
 876 static int
 877 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 878 {
 879         struct ahd_softc *ahd;
 880         int    found;
 881         unsigned long flags;
 882
 883         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 884 #ifdef AHD_DEBUG
 885         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 886                 printf("%s: Bus reset called for cmd %p\n",
 887                        ahd_name(ahd), cmd);
 888 #endif
 889         ahd_lock(ahd, &flags);
 890
 891         found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 892                                   /*initiate reset*/TRUE);
 893         ahd_unlock(ahd, &flags);
 894
 895         if (bootverbose)
 896                 printf("%s: SCSI bus reset delivered. "
 897                        "%d SCBs aborted.\n", ahd_name(ahd), found);
 898
 899         return (SUCCESS);
 900 }
 901
 902 struct scsi_host_template aic79xx_driver_template = {
 903         .module                 = THIS_MODULE,
 904         .name                   = "aic79xx",
 905         .proc_name              = "aic79xx",
 906         .proc_info              = ahd_linux_proc_info,
 907         .info                   = ahd_linux_info,
 908         .queuecommand           = ahd_linux_queue,
 909         .eh_abort_handler       = ahd_linux_abort,
 910         .eh_device_reset_handler = ahd_linux_dev_reset,
 911         .eh_bus_reset_handler   = ahd_linux_bus_reset,
 912 #if defined(__i386__)
 913         .bios_param             = ahd_linux_biosparam,
 914 #endif
 915         .can_queue              = AHD_MAX_QUEUE,
 916         .this_id                = -1,
 917         .max_sectors            = 8192,
 918         .cmd_per_lun            = 2,
 919         .use_clustering         = ENABLE_CLUSTERING,
 920         .slave_alloc            = ahd_linux_slave_alloc,
 921         .slave_configure        = ahd_linux_slave_configure,
 922         .target_alloc           = ahd_linux_target_alloc,
 923         .target_destroy         = ahd_linux_target_destroy,
 924 };
 925
 926 /******************************** Bus DMA *************************************/
 927 int
 928 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
 929                    bus_size_t alignment, bus_size_t boundary,
 930                    dma_addr_t lowaddr, dma_addr_t highaddr,
 931                    bus_dma_filter_t *filter, void *filterarg,
 932                    bus_size_t maxsize, int nsegments,
 933                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
 934 {
 935         bus_dma_tag_t dmat;
 936
 937         dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
 938         if (dmat == NULL)
 939                 return (ENOMEM);
 940
 941         /*
 942          * Linux is very simplistic about DMA memory.  For now don't
 943          * maintain all specification information.  Once Linux supplies
 944          * better facilities for doing these operations, or the
 945          * needs of this particular driver change, we might need to do
 946          * more here.
 947          */
 948         dmat->alignment = alignment;
 949         dmat->boundary = boundary;
 950         dmat->maxsize = maxsize;
 951         *ret_tag = dmat;
 952         return (0);
 953 }
 954
 955 void
 956 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
 957 {
 958         free(dmat, M_DEVBUF);
 959 }
 960
 961 int
 962 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
 963                  int flags, bus_dmamap_t *mapp)
 964 {
 965         *vaddr = pci_alloc_consistent(ahd->dev_softc,
 966                                       dmat->maxsize, mapp);
 967         if (*vaddr == NULL)
 968                 return (ENOMEM);
 969         return(0);
 970 }
 971
 972 void
 973 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
 974                 void* vaddr, bus_dmamap_t map)
 975 {
 976         pci_free_consistent(ahd->dev_softc, dmat->maxsize,
 977                             vaddr, map);
 978 }
 979
 980 int
 981 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
 982                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
 983                 void *cb_arg, int flags)
 984 {
 985         /*
 986          * Assume for now that this will only be used during
 987          * initialization and not for per-transaction buffer mapping.
 988          */
 989         bus_dma_segment_t stack_sg;
 990
 991         stack_sg.ds_addr = map;
 992         stack_sg.ds_len = dmat->maxsize;
 993         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
 994         return (0);
 995 }
 996
 997 void
 998 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 999 {
1000 }
1001
1002 int
1003 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1004 {
1005         /* Nothing to do */
1006         return (0);
1007 }
1008
1009 /********************* Platform Dependent Functions ***************************/
1010 static void
1011 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1012 {
1013
1014         if ((instance >= 0)
1015          && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1016                 uint8_t *iocell_info;
1017
1018                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1019                 iocell_info[index] = value & 0xFFFF;
1020                 if (bootverbose)
1021                         printf("iocell[%d:%ld] = %d\n", instance, index, value);
1022         }
1023 }
1024
1025 static void
1026 ahd_linux_setup_tag_info_global(char *p)
1027 {
1028         int tags, i, j;
1029
1030         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1031         printf("Setting Global Tags= %d\n", tags);
1032
1033         for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1034                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1035                         aic79xx_tag_info[i].tag_commands[j] = tags;
1036                 }
1037         }
1038 }
1039
1040 static void
1041 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1042 {
1043
1044         if ((instance >= 0) && (targ >= 0)
1045          && (instance < ARRAY_SIZE(aic79xx_tag_info))
1046          && (targ < AHD_NUM_TARGETS)) {
1047                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1048                 if (bootverbose)
1049                         printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1050         }
1051 }
1052
1053 static char *
1054 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1055                        void (*callback)(u_long, int, int, int32_t),
1056                        u_long callback_arg)
1057 {
1058         char    *tok_end;
1059         char    *tok_end2;
1060         int      i;
1061         int      instance;
1062         int      targ;
1063         int      done;
1064         char     tok_list[] = {'.', ',', '{', '}', '\0'};
1065
1066         /* All options use a ':' name/arg separator */
1067         if (*opt_arg != ':')
1068                 return (opt_arg);
1069         opt_arg++;
1070         instance = -1;
1071         targ = -1;
1072         done = FALSE;
1073         /*
1074          * Restore separator that may be in
1075          * the middle of our option argument.
1076          */
1077         tok_end = strchr(opt_arg, '\0');
1078         if (tok_end < end)
1079                 *tok_end = ',';
1080         while (!done) {
1081                 switch (*opt_arg) {
1082                 case '{':
1083                         if (instance == -1) {
1084                                 instance = 0;
1085                         } else {
1086                                 if (depth > 1) {
1087                                         if (targ == -1)
1088                                                 targ = 0;
1089                                 } else {
1090                                         printf("Malformed Option %s\n",
1091                                                opt_name);
1092                                         done = TRUE;
1093                                 }
1094                         }
1095                         opt_arg++;
1096                         break;
1097                 case '}':
1098                         if (targ != -1)
1099                                 targ = -1;
1100                         else if (instance != -1)
1101                                 instance = -1;
1102                         opt_arg++;
1103                         break;
1104                 case ',':
1105                 case '.':
1106                         if (instance == -1)
1107                                 done = TRUE;
1108                         else if (targ >= 0)
1109                                 targ++;
1110                         else if (instance >= 0)
1111                                 instance++;
1112                         opt_arg++;
1113                         break;
1114                 case '\0':
1115                         done = TRUE;
1116                         break;
1117                 default:
1118                         tok_end = end;
1119                         for (i = 0; tok_list[i]; i++) {
1120                                 tok_end2 = strchr(opt_arg, tok_list[i]);
1121                                 if ((tok_end2) && (tok_end2 < tok_end))
1122                                         tok_end = tok_end2;
1123                         }
1124                         callback(callback_arg, instance, targ,
1125                                  simple_strtol(opt_arg, NULL, 0));
1126                         opt_arg = tok_end;
1127                         break;
1128                 }
1129         }
1130         return (opt_arg);
1131 }
1132
1133 /*
1134  * Handle Linux boot parameters. This routine allows for assigning a value
1135  * to a parameter with a ':' between the parameter and the value.
1136  * ie. aic79xx=stpwlev:1,extended
1137  */
1138 static int
1139 aic79xx_setup(char *s)
1140 {
1141         int     i, n;
1142         char   *p;
1143         char   *end;
1144
1145         static const struct {
1146                 const char *name;
1147                 uint32_t *flag;
1148         } options[] = {
1149                 { "extended", &aic79xx_extended },
1150                 { "no_reset", &aic79xx_no_reset },
1151                 { "verbose", &aic79xx_verbose },
1152                 { "allow_memio", &aic79xx_allow_memio},
1153 #ifdef AHD_DEBUG
1154                 { "debug", &ahd_debug },
1155 #endif
1156                 { "periodic_otag", &aic79xx_periodic_otag },
1157                 { "pci_parity", &aic79xx_pci_parity },
1158                 { "seltime", &aic79xx_seltime },
1159                 { "tag_info", NULL },
1160                 { "global_tag_depth", NULL},
1161                 { "slewrate", NULL },
1162                 { "precomp", NULL },
1163                 { "amplitude", NULL },
1164                 { "slowcrc", &aic79xx_slowcrc },
1165         };
1166
1167         end = strchr(s, '\0');
1168
1169         /*
1170          * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1171          * will never be 0 in this case.
1172          */
1173         n = 0;
1174
1175         while ((p = strsep(&s, ",.")) != NULL) {
1176                 if (*p == '\0')
1177                         continue;
1178                 for (i = 0; i < ARRAY_SIZE(options); i++) {
1179
1180                         n = strlen(options[i].name);
1181                         if (strncmp(options[i].name, p, n) == 0)
1182                                 break;
1183                 }
1184                 if (i == ARRAY_SIZE(options))
1185                         continue;
1186
1187                 if (strncmp(p, "global_tag_depth", n) == 0) {
1188                         ahd_linux_setup_tag_info_global(p + n);
1189                 } else if (strncmp(p, "tag_info", n) == 0) {
1190                         s = ahd_parse_brace_option("tag_info", p + n, end,
1191                             2, ahd_linux_setup_tag_info, 0);
1192                 } else if (strncmp(p, "slewrate", n) == 0) {
1193                         s = ahd_parse_brace_option("slewrate",
1194                             p + n, end, 1, ahd_linux_setup_iocell_info,
1195                             AIC79XX_SLEWRATE_INDEX);
1196                 } else if (strncmp(p, "precomp", n) == 0) {
1197                         s = ahd_parse_brace_option("precomp",
1198                             p + n, end, 1, ahd_linux_setup_iocell_info,
1199                             AIC79XX_PRECOMP_INDEX);
1200                 } else if (strncmp(p, "amplitude", n) == 0) {
1201                         s = ahd_parse_brace_option("amplitude",
1202                             p + n, end, 1, ahd_linux_setup_iocell_info,
1203                             AIC79XX_AMPLITUDE_INDEX);
1204                 } else if (p[n] == ':') {
1205                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1206                 } else if (!strncmp(p, "verbose", n)) {
1207                         *(options[i].flag) = 1;
1208                 } else {
1209                         *(options[i].flag) ^= 0xFFFFFFFF;
1210                 }
1211         }
1212         return 1;
1213 }
1214
1215 __setup("aic79xx=", aic79xx_setup);
1216
1217 uint32_t aic79xx_verbose;
1218
1219 int
1220 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1221 {
1222         char    buf[80];
1223         struct  Scsi_Host *host;
1224         char    *new_name;
1225         u_long  s;
1226         int     retval;
1227
1228         template->name = ahd->description;
1229         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1230         if (host == NULL)
1231                 return (ENOMEM);
1232
1233         *((struct ahd_softc **)host->hostdata) = ahd;
1234         ahd->platform_data->host = host;
1235         host->can_queue = AHD_MAX_QUEUE;
1236         host->cmd_per_lun = 2;
1237         host->sg_tablesize = AHD_NSEG;
1238         host->this_id = ahd->our_id;
1239         host->irq = ahd->platform_data->irq;
1240         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1241         host->max_lun = AHD_NUM_LUNS;
1242         host->max_channel = 0;
1243         host->sg_tablesize = AHD_NSEG;
1244         ahd_lock(ahd, &s);
1245         ahd_set_unit(ahd, ahd_linux_unit++);
1246         ahd_unlock(ahd, &s);
1247         sprintf(buf, "scsi%d", host->host_no);
1248         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1249         if (new_name != NULL) {
1250                 strcpy(new_name, buf);
1251                 ahd_set_name(ahd, new_name);
1252         }
1253         host->unique_id = ahd->unit;
1254         ahd_linux_initialize_scsi_bus(ahd);
1255         ahd_intr_enable(ahd, TRUE);
1256
1257         host->transportt = ahd_linux_transport_template;
1258
1259         retval = scsi_add_host(host, &ahd->dev_softc->dev);
1260         if (retval) {
1261                 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1262                 scsi_host_put(host);
1263                 return retval;
1264         }
1265
1266         scsi_scan_host(host);
1267         return 0;
1268 }
1269
1270 /*
1271  * Place the SCSI bus into a known state by either resetting it,
1272  * or forcing transfer negotiations on the next command to any
1273  * target.
1274  */
1275 static void
1276 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1277 {
1278         u_int target_id;
1279         u_int numtarg;
1280         unsigned long s;
1281
1282         target_id = 0;
1283         numtarg = 0;
1284
1285         if (aic79xx_no_reset != 0)
1286                 ahd->flags &= ~AHD_RESET_BUS_A;
1287
1288         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1289                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1290         else
1291                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1292
1293         ahd_lock(ahd, &s);
1294
1295         /*
1296          * Force negotiation to async for all targets that
1297          * will not see an initial bus reset.
1298          */
1299         for (; target_id < numtarg; target_id++) {
1300                 struct ahd_devinfo devinfo;
1301                 struct ahd_initiator_tinfo *tinfo;
1302                 struct ahd_tmode_tstate *tstate;
1303
1304                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1305                                             target_id, &tstate);
1306                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1307                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1308                 ahd_update_neg_request(ahd, &devinfo, tstate,
1309                                        tinfo, AHD_NEG_ALWAYS);
1310         }
1311         ahd_unlock(ahd, &s);
1312         /* Give the bus some time to recover */
1313         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1314                 ahd_freeze_simq(ahd);
1315                 msleep(AIC79XX_RESET_DELAY);
1316                 ahd_release_simq(ahd);
1317         }
1318 }
1319
1320 int
1321 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1322 {
1323         ahd->platform_data =
1324             malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1325         if (ahd->platform_data == NULL)
1326                 return (ENOMEM);
1327         memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1328         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1329         ahd_lockinit(ahd);
1330         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1331         return (0);
1332 }
1333
1334 void
1335 ahd_platform_free(struct ahd_softc *ahd)
1336 {
1337         struct scsi_target *starget;
1338         int i;
1339
1340         if (ahd->platform_data != NULL) {
1341                 /* destroy all of the device and target objects */
1342                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1343                         starget = ahd->platform_data->starget[i];
1344                         if (starget != NULL) {
1345                                 ahd->platform_data->starget[i] = NULL;
1346                         }
1347                 }
1348
1349                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1350                         free_irq(ahd->platform_data->irq, ahd);
1351                 if (ahd->tags[0] == BUS_SPACE_PIO
1352                  && ahd->bshs[0].ioport != 0)
1353                         release_region(ahd->bshs[0].ioport, 256);
1354                 if (ahd->tags[1] == BUS_SPACE_PIO
1355                  && ahd->bshs[1].ioport != 0)
1356                         release_region(ahd->bshs[1].ioport, 256);
1357                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1358                  && ahd->bshs[0].maddr != NULL) {
1359                         iounmap(ahd->bshs[0].maddr);
1360                         release_mem_region(ahd->platform_data->mem_busaddr,
1361                                            0x1000);
1362                 }
1363                 if (ahd->platform_data->host)
1364                         scsi_host_put(ahd->platform_data->host);
1365
1366                 free(ahd->platform_data, M_DEVBUF);
1367         }
1368 }
1369
1370 void
1371 ahd_platform_init(struct ahd_softc *ahd)
1372 {
1373         /*
1374          * Lookup and commit any modified IO Cell options.
1375          */
1376         if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1377                 const struct ahd_linux_iocell_opts *iocell_opts;
1378
1379                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1380                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1381                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1382                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1383                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1384                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1385                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1386         }
1387
1388 }
1389
1390 void
1391 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1392 {
1393         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1394                                 SCB_GET_CHANNEL(ahd, scb),
1395                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1396                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1397 }
1398
1399 void
1400 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1401                       struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1402 {
1403         struct ahd_linux_device *dev;
1404         int was_queuing;
1405         int now_queuing;
1406
1407         if (sdev == NULL)
1408                 return;
1409
1410         dev = scsi_transport_device_data(sdev);
1411
1412         if (dev == NULL)
1413                 return;
1414         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1415         switch (alg) {
1416         default:
1417         case AHD_QUEUE_NONE:
1418                 now_queuing = 0;
1419                 break;
1420         case AHD_QUEUE_BASIC:
1421                 now_queuing = AHD_DEV_Q_BASIC;
1422                 break;
1423         case AHD_QUEUE_TAGGED:
1424                 now_queuing = AHD_DEV_Q_TAGGED;
1425                 break;
1426         }
1427         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1428          && (was_queuing != now_queuing)
1429          && (dev->active != 0)) {
1430                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1431                 dev->qfrozen++;
1432         }
1433
1434         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1435         if (now_queuing) {
1436                 u_int usertags;
1437
1438                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1439                 if (!was_queuing) {
1440                         /*
1441                          * Start out agressively and allow our
1442                          * dynamic queue depth algorithm to take
1443                          * care of the rest.
1444                          */
1445                         dev->maxtags = usertags;
1446                         dev->openings = dev->maxtags - dev->active;
1447                 }
1448                 if (dev->maxtags == 0) {
1449                         /*
1450                          * Queueing is disabled by the user.
1451                          */
1452                         dev->openings = 1;
1453                 } else if (alg == AHD_QUEUE_TAGGED) {
1454                         dev->flags |= AHD_DEV_Q_TAGGED;
1455                         if (aic79xx_periodic_otag != 0)
1456                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1457                 } else
1458                         dev->flags |= AHD_DEV_Q_BASIC;
1459         } else {
1460                 /* We can only have one opening. */
1461                 dev->maxtags = 0;
1462                 dev->openings =  1 - dev->active;
1463         }
1464
1465         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1466         case AHD_DEV_Q_BASIC:
1467                 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1468                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1469                 break;
1470         case AHD_DEV_Q_TAGGED:
1471                 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1472                 scsi_activate_tcq(sdev, dev->openings + dev->active);
1473                 break;
1474         default:
1475                 /*
1476                  * We allow the OS to queue 2 untagged transactions to
1477                  * us at any time even though we can only execute them
1478                  * serially on the controller/device.  This should
1479                  * remove some latency.
1480                  */
1481                 scsi_deactivate_tcq(sdev, 1);
1482                 break;
1483         }
1484 }
1485
1486 int
1487 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1488                         int lun, u_int tag, role_t role, uint32_t status)
1489 {
1490         return 0;
1491 }
1492
1493 static u_int
1494 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1495 {
1496         static int warned_user;
1497         u_int tags;
1498
1499         tags = 0;
1500         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1501                 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1502
1503                         if (warned_user == 0) {
1504                                 printf(KERN_WARNING
1505 "aic79xx: WARNING: Insufficient tag_info instances\n"
1506 "aic79xx: for installed controllers.  Using defaults\n"
1507 "aic79xx: Please update the aic79xx_tag_info array in\n"
1508 "aic79xx: the aic79xx_osm.c source file.\n");
1509                                 warned_user++;
1510                         }
1511                         tags = AHD_MAX_QUEUE;
1512                 } else {
1513                         adapter_tag_info_t *tag_info;
1514
1515                         tag_info = &aic79xx_tag_info[ahd->unit];
1516                         tags = tag_info->tag_commands[devinfo->target_offset];
1517                         if (tags > AHD_MAX_QUEUE)
1518                                 tags = AHD_MAX_QUEUE;
1519                 }
1520         }
1521         return (tags);
1522 }
1523
1524 /*
1525  * Determines the queue depth for a given device.
1526  */
1527 static void
1528 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1529 {
1530         struct  ahd_devinfo devinfo;
1531         u_int   tags;
1532         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1533
1534         ahd_compile_devinfo(&devinfo,
1535                             ahd->our_id,
1536                             sdev->sdev_target->id, sdev->lun,
1537                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1538                             ROLE_INITIATOR);
1539         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1540         if (tags != 0 && sdev->tagged_supported != 0) {
1541
1542                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1543                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1544                                devinfo.lun, AC_TRANSFER_NEG);
1545                 ahd_print_devinfo(ahd, &devinfo);
1546                 printf("Tagged Queuing enabled.  Depth %d\n", tags);
1547         } else {
1548                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1549                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1550                                devinfo.lun, AC_TRANSFER_NEG);
1551         }
1552 }
1553
1554 static int
1555 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1556                       struct scsi_cmnd *cmd)
1557 {
1558         struct   scb *scb;
1559         struct   hardware_scb *hscb;
1560         struct   ahd_initiator_tinfo *tinfo;
1561         struct   ahd_tmode_tstate *tstate;
1562         u_int    col_idx;
1563         uint16_t mask;
1564         unsigned long flags;
1565         int nseg;
1566
1567         nseg = scsi_dma_map(cmd);
1568         if (nseg < 0)
1569                 return SCSI_MLQUEUE_HOST_BUSY;
1570
1571         ahd_lock(ahd, &flags);
1572
1573         /*
1574          * Get an scb to use.
1575          */
1576         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1577                                     cmd->device->id, &tstate);
1578         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1579          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1580                 col_idx = AHD_NEVER_COL_IDX;
1581         } else {
1582                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1583                                             cmd->device->lun);
1584         }
1585         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1586                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1587                 ahd_unlock(ahd, &flags);
1588                 scsi_dma_unmap(cmd);
1589                 return SCSI_MLQUEUE_HOST_BUSY;
1590         }
1591
1592         scb->io_ctx = cmd;
1593         scb->platform_data->dev = dev;
1594         hscb = scb->hscb;
1595         cmd->host_scribble = (char *)scb;
1596
1597         /*
1598          * Fill out basics of the HSCB.
1599          */
1600         hscb->control = 0;
1601         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1602         hscb->lun = cmd->device->lun;
1603         scb->hscb->task_management = 0;
1604         mask = SCB_GET_TARGET_MASK(ahd, scb);
1605
1606         if ((ahd->user_discenable & mask) != 0)
1607                 hscb->control |= DISCENB;
1608
1609         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1610                 scb->flags |= SCB_PACKETIZED;
1611
1612         if ((tstate->auto_negotiate & mask) != 0) {
1613                 scb->flags |= SCB_AUTO_NEGOTIATE;
1614                 scb->hscb->control |= MK_MESSAGE;
1615         }
1616
1617         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1618                 int     msg_bytes;
1619                 uint8_t tag_msgs[2];
1620
1621                 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1622                 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1623                         hscb->control |= tag_msgs[0];
1624                         if (tag_msgs[0] == MSG_ORDERED_TASK)
1625                                 dev->commands_since_idle_or_otag = 0;
1626                 } else
1627                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1628                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1629                         hscb->control |= MSG_ORDERED_TASK;
1630                         dev->commands_since_idle_or_otag = 0;
1631                 } else {
1632                         hscb->control |= MSG_SIMPLE_TASK;
1633                 }
1634         }
1635
1636         hscb->cdb_len = cmd->cmd_len;
1637         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1638
1639         scb->platform_data->xfer_len = 0;
1640         ahd_set_residual(scb, 0);
1641         ahd_set_sense_residual(scb, 0);
1642         scb->sg_count = 0;
1643
1644         if (nseg > 0) {
1645                 void *sg = scb->sg_list;
1646                 struct scatterlist *cur_seg;
1647                 int i;
1648
1649                 scb->platform_data->xfer_len = 0;
1650
1651                 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1652                         dma_addr_t addr;
1653                         bus_size_t len;
1654
1655                         addr = sg_dma_address(cur_seg);
1656                         len = sg_dma_len(cur_seg);
1657                         scb->platform_data->xfer_len += len;
1658                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1659                                           i == (nseg - 1));
1660                 }
1661         }
1662
1663         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1664         dev->openings--;
1665         dev->active++;
1666         dev->commands_issued++;
1667
1668         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1669                 dev->commands_since_idle_or_otag++;
1670         scb->flags |= SCB_ACTIVE;
1671         ahd_queue_scb(ahd, scb);
1672
1673         ahd_unlock(ahd, &flags);
1674
1675         return 0;
1676 }
1677
1678 /*
1679  * SCSI controller interrupt handler.
1680  */
1681 irqreturn_t
1682 ahd_linux_isr(int irq, void *dev_id)
1683 {
1684         struct  ahd_softc *ahd;
1685         u_long  flags;
1686         int     ours;
1687
1688         ahd = (struct ahd_softc *) dev_id;
1689         ahd_lock(ahd, &flags);
1690         ours = ahd_intr(ahd);
1691         ahd_unlock(ahd, &flags);
1692         return IRQ_RETVAL(ours);
1693 }
1694
1695 void
1696 ahd_send_async(struct ahd_softc *ahd, char channel,
1697                u_int target, u_int lun, ac_code code)
1698 {
1699         switch (code) {
1700         case AC_TRANSFER_NEG:
1701         {
1702                 char    buf[80];
1703                 struct  scsi_target *starget;
1704                 struct  info_str info;
1705                 struct  ahd_initiator_tinfo *tinfo;
1706                 struct  ahd_tmode_tstate *tstate;
1707                 unsigned int target_ppr_options;
1708
1709                 BUG_ON(target == CAM_TARGET_WILDCARD);
1710
1711                 info.buffer = buf;
1712                 info.length = sizeof(buf);
1713                 info.offset = 0;
1714                 info.pos = 0;
1715                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1716                                             target, &tstate);
1717
1718                 /*
1719                  * Don't bother reporting results while
1720                  * negotiations are still pending.
1721                  */
1722                 if (tinfo->curr.period != tinfo->goal.period
1723                  || tinfo->curr.width != tinfo->goal.width
1724                  || tinfo->curr.offset != tinfo->goal.offset
1725                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1726                         if (bootverbose == 0)
1727                                 break;
1728
1729                 /*
1730                  * Don't bother reporting results that
1731                  * are identical to those last reported.
1732                  */
1733                 starget = ahd->platform_data->starget[target];
1734                 if (starget == NULL)
1735                         break;
1736
1737                 target_ppr_options =
1738                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1739                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1740                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1741                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1742                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1743                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1744                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1745                         + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1746
1747                 if (tinfo->curr.period == spi_period(starget)
1748                     && tinfo->curr.width == spi_width(starget)
1749                     && tinfo->curr.offset == spi_offset(starget)
1750                  && tinfo->curr.ppr_options == target_ppr_options)
1751                         if (bootverbose == 0)
1752                                 break;
1753
1754                 spi_period(starget) = tinfo->curr.period;
1755                 spi_width(starget) = tinfo->curr.width;
1756                 spi_offset(starget) = tinfo->curr.offset;
1757                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1758                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1759                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1760                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1761                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1762                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1763                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1764                 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1765                 spi_display_xfer_agreement(starget);
1766                 break;
1767         }
1768         case AC_SENT_BDR:
1769         {
1770                 WARN_ON(lun != CAM_LUN_WILDCARD);
1771                 scsi_report_device_reset(ahd->platform_data->host,
1772                                          channel - 'A', target);
1773                 break;
1774         }
1775         case AC_BUS_RESET:
1776                 if (ahd->platform_data->host != NULL) {
1777                         scsi_report_bus_reset(ahd->platform_data->host,
1778                                               channel - 'A');
1779                 }
1780                 break;
1781         default:
1782                 panic("ahd_send_async: Unexpected async event");
1783         }
1784 }
1785
1786 /*
1787  * Calls the higher level scsi done function and frees the scb.
1788  */
1789 void
1790 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1791 {
1792         struct scsi_cmnd *cmd;
1793         struct    ahd_linux_device *dev;
1794
1795         if ((scb->flags & SCB_ACTIVE) == 0) {
1796                 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1797                 ahd_dump_card_state(ahd);
1798                 panic("Stopping for safety");
1799         }
1800         LIST_REMOVE(scb, pending_links);
1801         cmd = scb->io_ctx;
1802         dev = scb->platform_data->dev;
1803         dev->active--;
1804         dev->openings++;
1805         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1806                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1807                 dev->qfrozen--;
1808         }
1809         ahd_linux_unmap_scb(ahd, scb);
1810
1811         /*
1812          * Guard against stale sense data.
1813          * The Linux mid-layer assumes that sense
1814          * was retrieved anytime the first byte of
1815          * the sense buffer looks "sane".
1816          */
1817         cmd->sense_buffer[0] = 0;
1818         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1819                 uint32_t amount_xferred;
1820
1821                 amount_xferred =
1822                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1823                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1824 #ifdef AHD_DEBUG
1825                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1826                                 ahd_print_path(ahd, scb);
1827                                 printf("Set CAM_UNCOR_PARITY\n");
1828                         }
1829 #endif
1830                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1831 #ifdef AHD_REPORT_UNDERFLOWS
1832                 /*
1833                  * This code is disabled by default as some
1834                  * clients of the SCSI system do not properly
1835                  * initialize the underflow parameter.  This
1836                  * results in spurious termination of commands
1837                  * that complete as expected (e.g. underflow is
1838                  * allowed as command can return variable amounts
1839                  * of data.
1840                  */
1841                 } else if (amount_xferred < scb->io_ctx->underflow) {
1842                         u_int i;
1843
1844                         ahd_print_path(ahd, scb);
1845                         printf("CDB:");
1846                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1847                                 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1848                         printf("\n");
1849                         ahd_print_path(ahd, scb);
1850                         printf("Saw underflow (%ld of %ld bytes). "
1851                                "Treated as error\n",
1852                                 ahd_get_residual(scb),
1853                                 ahd_get_transfer_length(scb));
1854                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1855 #endif
1856                 } else {
1857                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1858                 }
1859         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1860                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1861         }
1862
1863         if (dev->openings == 1
1864          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1865          && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1866                 dev->tag_success_count++;
1867         /*
1868          * Some devices deal with temporary internal resource
1869          * shortages by returning queue full.  When the queue
1870          * full occurrs, we throttle back.  Slowly try to get
1871          * back to our previous queue depth.
1872          */
1873         if ((dev->openings + dev->active) < dev->maxtags
1874          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1875                 dev->tag_success_count = 0;
1876                 dev->openings++;
1877         }
1878
1879         if (dev->active == 0)
1880                 dev->commands_since_idle_or_otag = 0;
1881
1882         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1883                 printf("Recovery SCB completes\n");
1884                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1885                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1886                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1887
1888                 if (ahd->platform_data->eh_done)
1889                         complete(ahd->platform_data->eh_done);
1890         }
1891
1892         ahd_free_scb(ahd, scb);
1893         ahd_linux_queue_cmd_complete(ahd, cmd);
1894 }
1895
1896 static void
1897 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1898                              struct scsi_device *sdev, struct scb *scb)
1899 {
1900         struct  ahd_devinfo devinfo;
1901         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1902
1903         ahd_compile_devinfo(&devinfo,
1904                             ahd->our_id,
1905                             sdev->sdev_target->id, sdev->lun,
1906                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1907                             ROLE_INITIATOR);
1908
1909         /*
1910          * We don't currently trust the mid-layer to
1911          * properly deal with queue full or busy.  So,
1912          * when one occurs, we tell the mid-layer to
1913          * unconditionally requeue the command to us
1914          * so that we can retry it ourselves.  We also
1915          * implement our own throttling mechanism so
1916          * we don't clobber the device with too many
1917          * commands.
1918          */
1919         switch (ahd_get_scsi_status(scb)) {
1920         default:
1921                 break;
1922         case SCSI_STATUS_CHECK_COND:
1923         case SCSI_STATUS_CMD_TERMINATED:
1924         {
1925                 struct scsi_cmnd *cmd;
1926
1927                 /*
1928                  * Copy sense information to the OS's cmd
1929                  * structure if it is available.
1930                  */
1931                 cmd = scb->io_ctx;
1932                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1933                         struct scsi_status_iu_header *siu;
1934                         u_int sense_size;
1935                         u_int sense_offset;
1936
1937                         if (scb->flags & SCB_SENSE) {
1938                                 sense_size = min(sizeof(struct scsi_sense_data)
1939                                                - ahd_get_sense_residual(scb),
1940                                                  (u_long)SCSI_SENSE_BUFFERSIZE);
1941                                 sense_offset = 0;
1942                         } else {
1943                                 /*
1944                                  * Copy only the sense data into the provided
1945                                  * buffer.
1946                                  */
1947                                 siu = (struct scsi_status_iu_header *)
1948                                     scb->sense_data;
1949                                 sense_size = min_t(size_t,
1950                                                 scsi_4btoul(siu->sense_length),
1951                                                 SCSI_SENSE_BUFFERSIZE);
1952                                 sense_offset = SIU_SENSE_OFFSET(siu);
1953                         }
1954
1955                         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1956                         memcpy(cmd->sense_buffer,
1957                                ahd_get_sense_buf(ahd, scb)
1958                                + sense_offset, sense_size);
1959                         cmd->result |= (DRIVER_SENSE << 24);
1960
1961 #ifdef AHD_DEBUG
1962                         if (ahd_debug & AHD_SHOW_SENSE) {
1963                                 int i;
1964
1965                                 printf("Copied %d bytes of sense data at %d:",
1966                                        sense_size, sense_offset);
1967                                 for (i = 0; i < sense_size; i++) {
1968                                         if ((i & 0xF) == 0)
1969                                                 printf("\n");
1970                                         printf("0x%x ", cmd->sense_buffer[i]);
1971                                 }
1972                                 printf("\n");
1973                         }
1974 #endif
1975                 }
1976                 break;
1977         }
1978         case SCSI_STATUS_QUEUE_FULL:
1979                 /*
1980                  * By the time the core driver has returned this
1981                  * command, all other commands that were queued
1982                  * to us but not the device have been returned.
1983                  * This ensures that dev->active is equal to
1984                  * the number of commands actually queued to
1985                  * the device.
1986                  */
1987                 dev->tag_success_count = 0;
1988                 if (dev->active != 0) {
1989                         /*
1990                          * Drop our opening count to the number
1991                          * of commands currently outstanding.
1992                          */
1993                         dev->openings = 0;
1994 #ifdef AHD_DEBUG
1995                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1996                                 ahd_print_path(ahd, scb);
1997                                 printf("Dropping tag count to %d\n",
1998                                        dev->active);
1999                         }
2000 #endif
2001                         if (dev->active == dev->tags_on_last_queuefull) {
2002
2003                                 dev->last_queuefull_same_count++;
2004                                 /*
2005                                  * If we repeatedly see a queue full
2006                                  * at the same queue depth, this
2007                                  * device has a fixed number of tag
2008                                  * slots.  Lock in this tag depth
2009                                  * so we stop seeing queue fulls from
2010                                  * this device.
2011                                  */
2012                                 if (dev->last_queuefull_same_count
2013                                  == AHD_LOCK_TAGS_COUNT) {
2014                                         dev->maxtags = dev->active;
2015                                         ahd_print_path(ahd, scb);
2016                                         printf("Locking max tag count at %d\n",
2017                                                dev->active);
2018                                 }
2019                         } else {
2020                                 dev->tags_on_last_queuefull = dev->active;
2021                                 dev->last_queuefull_same_count = 0;
2022                         }
2023                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2024                         ahd_set_scsi_status(scb, SCSI_STATUS_OK);
2025                         ahd_platform_set_tags(ahd, sdev, &devinfo,
2026                                      (dev->flags & AHD_DEV_Q_BASIC)
2027                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2028                         break;
2029                 }
2030                 /*
2031                  * Drop down to a single opening, and treat this
2032                  * as if the target returned BUSY SCSI status.
2033                  */
2034                 dev->openings = 1;
2035                 ahd_platform_set_tags(ahd, sdev, &devinfo,
2036                              (dev->flags & AHD_DEV_Q_BASIC)
2037                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2038                 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2039         }
2040 }
2041
2042 static void
2043 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2044 {
2045         int status;
2046         int new_status = DID_OK;
2047         int do_fallback = 0;
2048         int scsi_status;
2049
2050         /*
2051          * Map CAM error codes into Linux Error codes.  We
2052          * avoid the conversion so that the DV code has the
2053          * full error information available when making
2054          * state change decisions.
2055          */
2056
2057         status = ahd_cmd_get_transaction_status(cmd);
2058         switch (status) {
2059         case CAM_REQ_INPROG:
2060         case CAM_REQ_CMP:
2061                 new_status = DID_OK;
2062                 break;
2063         case CAM_AUTOSENSE_FAIL:
2064                 new_status = DID_ERROR;
2065                 /* Fallthrough */
2066         case CAM_SCSI_STATUS_ERROR:
2067                 scsi_status = ahd_cmd_get_scsi_status(cmd);
2068
2069                 switch(scsi_status) {
2070                 case SCSI_STATUS_CMD_TERMINATED:
2071                 case SCSI_STATUS_CHECK_COND:
2072                         if ((cmd->result >> 24) != DRIVER_SENSE) {
2073                                 do_fallback = 1;
2074                         } else {
2075                                 struct scsi_sense_data *sense;
2076
2077                                 sense = (struct scsi_sense_data *)
2078                                         cmd->sense_buffer;
2079                                 if (sense->extra_len >= 5 &&
2080                                     (sense->add_sense_code == 0x47
2081                                      || sense->add_sense_code == 0x48))
2082                                         do_fallback = 1;
2083                         }
2084                         break;
2085                 default:
2086                         break;
2087                 }
2088                 break;
2089         case CAM_REQ_ABORTED:
2090                 new_status = DID_ABORT;
2091                 break;
2092         case CAM_BUSY:
2093                 new_status = DID_BUS_BUSY;
2094                 break;
2095         case CAM_REQ_INVALID:
2096         case CAM_PATH_INVALID:
2097                 new_status = DID_BAD_TARGET;
2098                 break;
2099         case CAM_SEL_TIMEOUT:
2100                 new_status = DID_NO_CONNECT;
2101                 break;
2102         case CAM_SCSI_BUS_RESET:
2103         case CAM_BDR_SENT:
2104                 new_status = DID_RESET;
2105                 break;
2106         case CAM_UNCOR_PARITY:
2107                 new_status = DID_PARITY;
2108                 do_fallback = 1;
2109                 break;
2110         case CAM_CMD_TIMEOUT:
2111                 new_status = DID_TIME_OUT;
2112                 do_fallback = 1;
2113                 break;
2114         case CAM_REQ_CMP_ERR:
2115         case CAM_UNEXP_BUSFREE:
2116         case CAM_DATA_RUN_ERR:
2117                 new_status = DID_ERROR;
2118                 do_fallback = 1;
2119                 break;
2120         case CAM_UA_ABORT:
2121         case CAM_NO_HBA:
2122         case CAM_SEQUENCE_FAIL:
2123         case CAM_CCB_LEN_ERR:
2124         case CAM_PROVIDE_FAIL:
2125         case CAM_REQ_TERMIO:
2126         case CAM_UNREC_HBA_ERROR:
2127         case CAM_REQ_TOO_BIG:
2128                 new_status = DID_ERROR;
2129                 break;
2130         case CAM_REQUEUE_REQ:
2131                 new_status = DID_REQUEUE;
2132                 break;
2133         default:
2134                 /* We should never get here */
2135                 new_status = DID_ERROR;
2136                 break;
2137         }
2138
2139         if (do_fallback) {
2140                 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2141                        ahd_name(ahd), status, cmd->device->channel,
2142                        cmd->device->id, cmd->device->lun);
2143         }
2144
2145         ahd_cmd_set_transaction_status(cmd, new_status);
2146
2147         cmd->scsi_done(cmd);
2148 }
2149
2150 static void
2151 ahd_freeze_simq(struct ahd_softc *ahd)
2152 {
2153         scsi_block_requests(ahd->platform_data->host);
2154 }
2155
2156 static void
2157 ahd_release_simq(struct ahd_softc *ahd)
2158 {
2159         scsi_unblock_requests(ahd->platform_data->host);
2160 }
2161
2162 static int
2163 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2164 {
2165         struct ahd_softc *ahd;
2166         struct ahd_linux_device *dev;
2167         struct scb *pending_scb;
2168         u_int  saved_scbptr;
2169         u_int  active_scbptr;
2170         u_int  last_phase;
2171         u_int  saved_scsiid;
2172         u_int  cdb_byte;
2173         int    retval;
2174         int    was_paused;
2175         int    paused;
2176         int    wait;
2177         int    disconnected;
2178         ahd_mode_state saved_modes;
2179         unsigned long flags;
2180
2181         pending_scb = NULL;
2182         paused = FALSE;
2183         wait = FALSE;
2184         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2185
2186         scmd_printk(KERN_INFO, cmd,
2187                     "Attempting to queue an ABORT message:");
2188
2189         printf("CDB:");
2190         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2191                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2192         printf("\n");
2193
2194         ahd_lock(ahd, &flags);
2195
2196         /*
2197          * First determine if we currently own this command.
2198          * Start by searching the device queue.  If not found
2199          * there, check the pending_scb list.  If not found
2200          * at all, and the system wanted us to just abort the
2201          * command, return success.
2202          */
2203         dev = scsi_transport_device_data(cmd->device);
2204
2205         if (dev == NULL) {
2206                 /*
2207                  * No target device for this command exists,
2208                  * so we must not still own the command.
2209                  */
2210                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2211                 retval = SUCCESS;
2212                 goto no_cmd;
2213         }
2214
2215         /*
2216          * See if we can find a matching cmd in the pending list.
2217          */
2218         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2219                 if (pending_scb->io_ctx == cmd)
2220                         break;
2221         }
2222
2223         if (pending_scb == NULL) {
2224                 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2225                 goto no_cmd;
2226         }
2227
2228         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2229                 /*
2230                  * We can't queue two recovery actions using the same SCB
2231                  */
2232                 retval = FAILED;
2233                 goto  done;
2234         }
2235
2236         /*
2237          * Ensure that the card doesn't do anything
2238          * behind our back.  Also make sure that we
2239          * didn't "just" miss an interrupt that would
2240          * affect this cmd.
2241          */
2242         was_paused = ahd_is_paused(ahd);
2243         ahd_pause_and_flushwork(ahd);
2244         paused = TRUE;
2245
2246         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2247                 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2248                 goto no_cmd;
2249         }
2250
2251         printf("%s: At time of recovery, card was %spaused\n",
2252                ahd_name(ahd), was_paused ? "" : "not ");
2253         ahd_dump_card_state(ahd);
2254
2255         disconnected = TRUE;
2256         if (ahd_search_qinfifo(ahd, cmd->device->id,
2257                                cmd->device->channel + 'A',
2258                                cmd->device->lun,
2259                                pending_scb->hscb->tag,
2260                                ROLE_INITIATOR, CAM_REQ_ABORTED,
2261                                SEARCH_COMPLETE) > 0) {
2262                 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2263                        ahd_name(ahd), cmd->device->channel,
2264                        cmd->device->id, cmd->device->lun);
2265                 retval = SUCCESS;
2266                 goto done;
2267         }
2268
2269         saved_modes = ahd_save_modes(ahd);
2270         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2271         last_phase = ahd_inb(ahd, LASTPHASE);
2272         saved_scbptr = ahd_get_scbptr(ahd);
2273         active_scbptr = saved_scbptr;
2274         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2275                 struct scb *bus_scb;
2276
2277                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2278                 if (bus_scb == pending_scb)
2279                         disconnected = FALSE;
2280         }
2281
2282         /*
2283          * At this point, pending_scb is the scb associated with the
2284          * passed in command.  That command is currently active on the
2285          * bus or is in the disconnected state.
2286          */
2287         saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2288         if (last_phase != P_BUSFREE
2289             && SCB_GET_TAG(pending_scb) == active_scbptr) {
2290
2291                 /*
2292                  * We're active on the bus, so assert ATN
2293                  * and hope that the target responds.
2294                  */
2295                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2296                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2297                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2298                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2299                 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2300                 wait = TRUE;
2301         } else if (disconnected) {
2302
2303                 /*
2304                  * Actually re-queue this SCB in an attempt
2305                  * to select the device before it reconnects.
2306                  */
2307                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2308                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2309                 pending_scb->hscb->cdb_len = 0;
2310                 pending_scb->hscb->task_attribute = 0;
2311                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2312
2313                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2314                         /*
2315                          * Mark the SCB has having an outstanding
2316                          * task management function.  Should the command
2317                          * complete normally before the task management
2318                          * function can be sent, the host will be notified
2319                          * to abort our requeued SCB.
2320                          */
2321                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2322                                  pending_scb->hscb->task_management);
2323                 } else {
2324                         /*
2325                          * If non-packetized, set the MK_MESSAGE control
2326                          * bit indicating that we desire to send a message.
2327                          * We also set the disconnected flag since there is
2328                          * no guarantee that our SCB control byte matches
2329                          * the version on the card.  We don't want the
2330                          * sequencer to abort the command thinking an
2331                          * unsolicited reselection occurred.
2332                          */
2333                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2334
2335                         /*
2336                          * The sequencer will never re-reference the
2337                          * in-core SCB.  To make sure we are notified
2338                          * during reselection, set the MK_MESSAGE flag in
2339                          * the card's copy of the SCB.
2340                          */
2341                         ahd_outb(ahd, SCB_CONTROL,
2342                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2343                 }
2344
2345                 /*
2346                  * Clear out any entries in the QINFIFO first
2347                  * so we are the next SCB for this target
2348                  * to run.
2349                  */
2350                 ahd_search_qinfifo(ahd, cmd->device->id,
2351                                    cmd->device->channel + 'A', cmd->device->lun,
2352                                    SCB_LIST_NULL, ROLE_INITIATOR,
2353                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2354                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2355                 ahd_set_scbptr(ahd, saved_scbptr);
2356                 ahd_print_path(ahd, pending_scb);
2357                 printf("Device is disconnected, re-queuing SCB\n");
2358                 wait = TRUE;
2359         } else {
2360                 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2361                 retval = FAILED;
2362                 goto done;
2363         }
2364
2365 no_cmd:
2366         /*
2367          * Our assumption is that if we don't have the command, no
2368          * recovery action was required, so we return success.  Again,
2369          * the semantics of the mid-layer recovery engine are not
2370          * well defined, so this may change in time.
2371          */
2372         retval = SUCCESS;
2373 done:
2374         if (paused)
2375                 ahd_unpause(ahd);
2376         if (wait) {
2377                 DECLARE_COMPLETION_ONSTACK(done);
2378
2379                 ahd->platform_data->eh_done = &done;
2380                 ahd_unlock(ahd, &flags);
2381
2382                 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2383                 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2384                         ahd_lock(ahd, &flags);
2385                         ahd->platform_data->eh_done = NULL;
2386                         ahd_unlock(ahd, &flags);
2387                         printf("%s: Timer Expired (active %d)\n",
2388                                ahd_name(ahd), dev->active);
2389                         retval = FAILED;
2390                 }
2391                 printf("Recovery code awake\n");
2392         } else
2393                 ahd_unlock(ahd, &flags);
2394
2395         if (retval != SUCCESS)
2396                 printf("%s: Command abort returning 0x%x\n",
2397                        ahd_name(ahd), retval);
2398
2399         return retval;
2400 }
2401
2402 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2403 {
2404         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2405         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2406         struct ahd_devinfo devinfo;
2407         unsigned long flags;
2408
2409         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2410                             starget->channel + 'A', ROLE_INITIATOR);
2411         ahd_lock(ahd, &flags);
2412         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2413         ahd_unlock(ahd, &flags);
2414 }
2415
2416 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2417 {
2418         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2419         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2420         struct ahd_tmode_tstate *tstate;
2421         struct ahd_initiator_tinfo *tinfo
2422                 = ahd_fetch_transinfo(ahd,
2423                                       starget->channel + 'A',
2424                                       shost->this_id, starget->id, &tstate);
2425         struct ahd_devinfo devinfo;
2426         unsigned int ppr_options = tinfo->goal.ppr_options;
2427         unsigned int dt;
2428         unsigned long flags;
2429         unsigned long offset = tinfo->goal.offset;
2430
2431 #ifdef AHD_DEBUG
2432         if ((ahd_debug & AHD_SHOW_DV) != 0)
2433                 printf("%s: set period to %d\n", ahd_name(ahd), period);
2434 #endif
2435         if (offset == 0)
2436                 offset = MAX_OFFSET;
2437
2438         if (period < 8)
2439                 period = 8;
2440         if (period < 10) {
2441                 if (spi_max_width(starget)) {
2442                         ppr_options |= MSG_EXT_PPR_DT_REQ;
2443                         if (period == 8)
2444                                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2445                 } else
2446                         period = 10;
2447         }
2448
2449         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2450
2451         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2452                             starget->channel + 'A', ROLE_INITIATOR);
2453
2454         /* all PPR requests apart from QAS require wide transfers */
2455         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2456                 if (spi_width(starget) == 0)
2457                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2458         }
2459
2460         ahd_find_syncrate(ahd, &period, &ppr_options,
2461                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2462
2463         ahd_lock(ahd, &flags);
2464         ahd_set_syncrate(ahd, &devinfo, period, offset,
2465                          ppr_options, AHD_TRANS_GOAL, FALSE);
2466         ahd_unlock(ahd, &flags);
2467 }
2468
2469 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2470 {
2471         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2472         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2473         struct ahd_tmode_tstate *tstate;
2474         struct ahd_initiator_tinfo *tinfo
2475                 = ahd_fetch_transinfo(ahd,
2476                                       starget->channel + 'A',
2477                                       shost->this_id, starget->id, &tstate);
2478         struct ahd_devinfo devinfo;
2479         unsigned int ppr_options = 0;
2480         unsigned int period = 0;
2481         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2482         unsigned long flags;
2483
2484 #ifdef AHD_DEBUG
2485         if ((ahd_debug & AHD_SHOW_DV) != 0)
2486                 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2487 #endif
2488
2489         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2490                             starget->channel + 'A', ROLE_INITIATOR);
2491         if (offset != 0) {
2492                 period = tinfo->goal.period;
2493                 ppr_options = tinfo->goal.ppr_options;
2494                 ahd_find_syncrate(ahd, &period, &ppr_options,
2495                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2496         }
2497
2498         ahd_lock(ahd, &flags);
2499         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2500                          AHD_TRANS_GOAL, FALSE);
2501         ahd_unlock(ahd, &flags);
2502 }
2503
2504 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2505 {
2506         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2507         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2508         struct ahd_tmode_tstate *tstate;
2509         struct ahd_initiator_tinfo *tinfo
2510                 = ahd_fetch_transinfo(ahd,
2511                                       starget->channel + 'A',
2512                                       shost->this_id, starget->id, &tstate);
2513         struct ahd_devinfo devinfo;
2514         unsigned int ppr_options = tinfo->goal.ppr_options
2515                 & ~MSG_EXT_PPR_DT_REQ;
2516         unsigned int period = tinfo->goal.period;
2517         unsigned int width = tinfo->goal.width;
2518         unsigned long flags;
2519
2520 #ifdef AHD_DEBUG
2521         if ((ahd_debug & AHD_SHOW_DV) != 0)
2522                 printf("%s: %s DT\n", ahd_name(ahd),
2523                        dt ? "enabling" : "disabling");
2524 #endif
2525         if (dt && spi_max_width(starget)) {
2526                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2527                 if (!width)
2528                         ahd_linux_set_width(starget, 1);
2529         } else {
2530                 if (period <= 9)
2531                         period = 10; /* If resetting DT, period must be >= 25ns */
2532                 /* IU is invalid without DT set */
2533                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2534         }
2535         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2536                             starget->channel + 'A', ROLE_INITIATOR);
2537         ahd_find_syncrate(ahd, &period, &ppr_options,
2538                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2539
2540         ahd_lock(ahd, &flags);
2541         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2542                          ppr_options, AHD_TRANS_GOAL, FALSE);
2543         ahd_unlock(ahd, &flags);
2544 }
2545
2546 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2547 {
2548         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2549         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2550         struct ahd_tmode_tstate *tstate;
2551         struct ahd_initiator_tinfo *tinfo
2552                 = ahd_fetch_transinfo(ahd,
2553                                       starget->channel + 'A',
2554                                       shost->this_id, starget->id, &tstate);
2555         struct ahd_devinfo devinfo;
2556         unsigned int ppr_options = tinfo->goal.ppr_options
2557                 & ~MSG_EXT_PPR_QAS_REQ;
2558         unsigned int period = tinfo->goal.period;
2559         unsigned int dt;
2560         unsigned long flags;
2561
2562 #ifdef AHD_DEBUG
2563         if ((ahd_debug & AHD_SHOW_DV) != 0)
2564                 printf("%s: %s QAS\n", ahd_name(ahd),
2565                        qas ? "enabling" : "disabling");
2566 #endif
2567
2568         if (qas) {
2569                 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2570         }
2571
2572         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2573
2574         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2575                             starget->channel + 'A', ROLE_INITIATOR);
2576         ahd_find_syncrate(ahd, &period, &ppr_options,
2577                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2578
2579         ahd_lock(ahd, &flags);
2580         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2581                          ppr_options, AHD_TRANS_GOAL, FALSE);
2582         ahd_unlock(ahd, &flags);
2583 }
2584
2585 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2586 {
2587         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2588         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2589         struct ahd_tmode_tstate *tstate;
2590         struct ahd_initiator_tinfo *tinfo
2591                 = ahd_fetch_transinfo(ahd,
2592                                       starget->channel + 'A',
2593                                       shost->this_id, starget->id, &tstate);
2594         struct ahd_devinfo devinfo;
2595         unsigned int ppr_options = tinfo->goal.ppr_options
2596                 & ~MSG_EXT_PPR_IU_REQ;
2597         unsigned int period = tinfo->goal.period;
2598         unsigned int dt;
2599         unsigned long flags;
2600
2601 #ifdef AHD_DEBUG
2602         if ((ahd_debug & AHD_SHOW_DV) != 0)
2603                 printf("%s: %s IU\n", ahd_name(ahd),
2604                        iu ? "enabling" : "disabling");
2605 #endif
2606
2607         if (iu && spi_max_width(starget)) {
2608                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2609                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2610         }
2611
2612         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2613
2614         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2615                             starget->channel + 'A', ROLE_INITIATOR);
2616         ahd_find_syncrate(ahd, &period, &ppr_options,
2617                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2618
2619         ahd_lock(ahd, &flags);
2620         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2621                          ppr_options, AHD_TRANS_GOAL, FALSE);
2622         ahd_unlock(ahd, &flags);
2623 }
2624
2625 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2626 {
2627         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2628         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2629         struct ahd_tmode_tstate *tstate;
2630         struct ahd_initiator_tinfo *tinfo
2631                 = ahd_fetch_transinfo(ahd,
2632                                       starget->channel + 'A',
2633                                       shost->this_id, starget->id, &tstate);
2634         struct ahd_devinfo devinfo;
2635         unsigned int ppr_options = tinfo->goal.ppr_options
2636                 & ~MSG_EXT_PPR_RD_STRM;
2637         unsigned int period = tinfo->goal.period;
2638         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2639         unsigned long flags;
2640
2641 #ifdef AHD_DEBUG
2642         if ((ahd_debug & AHD_SHOW_DV) != 0)
2643                 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2644                        rdstrm  ? "enabling" : "disabling");
2645 #endif
2646
2647         if (rdstrm && spi_max_width(starget))
2648                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2649
2650         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2651                             starget->channel + 'A', ROLE_INITIATOR);
2652         ahd_find_syncrate(ahd, &period, &ppr_options,
2653                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2654
2655         ahd_lock(ahd, &flags);
2656         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2657                          ppr_options, AHD_TRANS_GOAL, FALSE);
2658         ahd_unlock(ahd, &flags);
2659 }
2660
2661 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2662 {
2663         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2664         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2665         struct ahd_tmode_tstate *tstate;
2666         struct ahd_initiator_tinfo *tinfo
2667                 = ahd_fetch_transinfo(ahd,
2668                                       starget->channel + 'A',
2669                                       shost->this_id, starget->id, &tstate);
2670         struct ahd_devinfo devinfo;
2671         unsigned int ppr_options = tinfo->goal.ppr_options
2672                 & ~MSG_EXT_PPR_WR_FLOW;
2673         unsigned int period = tinfo->goal.period;
2674         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2675         unsigned long flags;
2676
2677 #ifdef AHD_DEBUG
2678         if ((ahd_debug & AHD_SHOW_DV) != 0)
2679                 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2680                        wrflow ? "enabling" : "disabling");
2681 #endif
2682
2683         if (wrflow && spi_max_width(starget))
2684                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2685
2686         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2687                             starget->channel + 'A', ROLE_INITIATOR);
2688         ahd_find_syncrate(ahd, &period, &ppr_options,
2689                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2690
2691         ahd_lock(ahd, &flags);
2692         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2693                          ppr_options, AHD_TRANS_GOAL, FALSE);
2694         ahd_unlock(ahd, &flags);
2695 }
2696
2697 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2698 {
2699         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2700         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2701         struct ahd_tmode_tstate *tstate;
2702         struct ahd_initiator_tinfo *tinfo
2703                 = ahd_fetch_transinfo(ahd,
2704                                       starget->channel + 'A',
2705                                       shost->this_id, starget->id, &tstate);
2706         struct ahd_devinfo devinfo;
2707         unsigned int ppr_options = tinfo->goal.ppr_options
2708                 & ~MSG_EXT_PPR_RTI;
2709         unsigned int period = tinfo->goal.period;
2710         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2711         unsigned long flags;
2712
2713         if ((ahd->features & AHD_RTI) == 0) {
2714 #ifdef AHD_DEBUG
2715                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2716                         printf("%s: RTI not available\n", ahd_name(ahd));
2717 #endif
2718                 return;
2719         }
2720
2721 #ifdef AHD_DEBUG
2722         if ((ahd_debug & AHD_SHOW_DV) != 0)
2723                 printf("%s: %s RTI\n", ahd_name(ahd),
2724                        rti ? "enabling" : "disabling");
2725 #endif
2726
2727         if (rti && spi_max_width(starget))
2728                 ppr_options |= MSG_EXT_PPR_RTI;
2729
2730         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2731                             starget->channel + 'A', ROLE_INITIATOR);
2732         ahd_find_syncrate(ahd, &period, &ppr_options,
2733                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2734
2735         ahd_lock(ahd, &flags);
2736         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2737                          ppr_options, AHD_TRANS_GOAL, FALSE);
2738         ahd_unlock(ahd, &flags);
2739 }
2740
2741 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2742 {
2743         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2744         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2745         struct ahd_tmode_tstate *tstate;
2746         struct ahd_initiator_tinfo *tinfo
2747                 = ahd_fetch_transinfo(ahd,
2748                                       starget->channel + 'A',
2749                                       shost->this_id, starget->id, &tstate);
2750         struct ahd_devinfo devinfo;
2751         unsigned int ppr_options = tinfo->goal.ppr_options
2752                 & ~MSG_EXT_PPR_PCOMP_EN;
2753         unsigned int period = tinfo->goal.period;
2754         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2755         unsigned long flags;
2756
2757 #ifdef AHD_DEBUG
2758         if ((ahd_debug & AHD_SHOW_DV) != 0)
2759                 printf("%s: %s Precompensation\n", ahd_name(ahd),
2760                        pcomp ? "Enable" : "Disable");
2761 #endif
2762
2763         if (pcomp && spi_max_width(starget)) {
2764                 uint8_t precomp;
2765
2766                 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2767                         const struct ahd_linux_iocell_opts *iocell_opts;
2768
2769                         iocell_opts = &aic79xx_iocell_info[ahd->unit];
2770                         precomp = iocell_opts->precomp;
2771                 } else {
2772                         precomp = AIC79XX_DEFAULT_PRECOMP;
2773                 }
2774                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2775                 AHD_SET_PRECOMP(ahd, precomp);
2776         } else {
2777                 AHD_SET_PRECOMP(ahd, 0);
2778         }
2779
2780         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2781                             starget->channel + 'A', ROLE_INITIATOR);
2782         ahd_find_syncrate(ahd, &period, &ppr_options,
2783                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2784
2785         ahd_lock(ahd, &flags);
2786         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2787                          ppr_options, AHD_TRANS_GOAL, FALSE);
2788         ahd_unlock(ahd, &flags);
2789 }
2790
2791 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2792 {
2793         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2794         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2795         struct ahd_tmode_tstate *tstate;
2796         struct ahd_initiator_tinfo *tinfo
2797                 = ahd_fetch_transinfo(ahd,
2798                                       starget->channel + 'A',
2799                                       shost->this_id, starget->id, &tstate);
2800         struct ahd_devinfo devinfo;
2801         unsigned int ppr_options = tinfo->goal.ppr_options
2802                 & ~MSG_EXT_PPR_HOLD_MCS;
2803         unsigned int period = tinfo->goal.period;
2804         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2805         unsigned long flags;
2806
2807         if (hold && spi_max_width(starget))
2808                 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2809
2810         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2811                             starget->channel + 'A', ROLE_INITIATOR);
2812         ahd_find_syncrate(ahd, &period, &ppr_options,
2813                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2814
2815         ahd_lock(ahd, &flags);
2816         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2817                          ppr_options, AHD_TRANS_GOAL, FALSE);
2818         ahd_unlock(ahd, &flags);
2819 }
2820
2821 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2822 {
2823         struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2824         unsigned long flags;
2825         u8 mode;
2826
2827         ahd_lock(ahd, &flags);
2828         ahd_pause(ahd);
2829         mode = ahd_inb(ahd, SBLKCTL);
2830         ahd_unpause(ahd);
2831         ahd_unlock(ahd, &flags);
2832
2833         if (mode & ENAB40)
2834                 spi_signalling(shost) = SPI_SIGNAL_LVD;
2835         else if (mode & ENAB20)
2836                 spi_signalling(shost) = SPI_SIGNAL_SE;
2837         else
2838                 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2839 }
2840
2841 static struct spi_function_template ahd_linux_transport_functions = {
2842         .set_offset     = ahd_linux_set_offset,
2843         .show_offset    = 1,
2844         .set_period     = ahd_linux_set_period,
2845         .show_period    = 1,
2846         .set_width      = ahd_linux_set_width,
2847         .show_width     = 1,
2848         .set_dt         = ahd_linux_set_dt,
2849         .show_dt        = 1,
2850         .set_iu         = ahd_linux_set_iu,
2851         .show_iu        = 1,
2852         .set_qas        = ahd_linux_set_qas,
2853         .show_qas       = 1,
2854         .set_rd_strm    = ahd_linux_set_rd_strm,
2855         .show_rd_strm   = 1,
2856         .set_wr_flow    = ahd_linux_set_wr_flow,
2857         .show_wr_flow   = 1,
2858         .set_rti        = ahd_linux_set_rti,
2859         .show_rti       = 1,
2860         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2861         .show_pcomp_en  = 1,
2862         .set_hold_mcs   = ahd_linux_set_hold_mcs,
2863         .show_hold_mcs  = 1,
2864         .get_signalling = ahd_linux_get_signalling,
2865 };
2866
2867 static int __init
2868 ahd_linux_init(void)
2869 {
2870         int     error = 0;
2871
2872         /*
2873          * If we've been passed any parameters, process them now.
2874          */
2875         if (aic79xx)
2876                 aic79xx_setup(aic79xx);
2877
2878         ahd_linux_transport_template =
2879                 spi_attach_transport(&ahd_linux_transport_functions);
2880         if (!ahd_linux_transport_template)
2881                 return -ENODEV;
2882
2883         scsi_transport_reserve_device(ahd_linux_transport_template,
2884                                       sizeof(struct ahd_linux_device));
2885
2886         error = ahd_linux_pci_init();
2887         if (error)
2888                 spi_release_transport(ahd_linux_transport_template);
2889         return error;
2890 }
2891
2892 static void __exit
2893 ahd_linux_exit(void)
2894 {
2895         ahd_linux_pci_exit();
2896         spi_release_transport(ahd_linux_transport_template);
2897 }
2898
2899 module_init(ahd_linux_init);
2900 module_exit(ahd_linux_exit);