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 #include <linux/slab.h>
  57
  58 /*
  59  * Bucket size for counting good commands in between bad ones.
  60  */
  61 #define AHD_LINUX_ERR_THRESH    1000
  62
  63 /*
  64  * Set this to the delay in seconds after SCSI bus reset.
  65  * Note, we honor this only for the initial bus reset.
  66  * The scsi error recovery code performs its own bus settle
  67  * delay handling for error recovery actions.
  68  */
  69 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
  70 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
  71 #else
  72 #define AIC79XX_RESET_DELAY 5000
  73 #endif
  74
  75 /*
  76  * To change the default number of tagged transactions allowed per-device,
  77  * add a line to the lilo.conf file like:
  78  * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
  79  * which will result in the first four devices on the first two
  80  * controllers being set to a tagged queue depth of 32.
  81  *
  82  * The tag_commands is an array of 16 to allow for wide and twin adapters.
  83  * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
  84  * for channel 1.
  85  */
  86 typedef struct {
  87         uint16_t tag_commands[16];      /* Allow for wide/twin adapters. */
  88 } adapter_tag_info_t;
  89
  90 /*
  91  * Modify this as you see fit for your system.
  92  *
  93  * 0                    tagged queuing disabled
  94  * 1 <= n <= 253        n == max tags ever dispatched.
  95  *
  96  * The driver will throttle the number of commands dispatched to a
  97  * device if it returns queue full.  For devices with a fixed maximum
  98  * queue depth, the driver will eventually determine this depth and
  99  * lock it in (a console message is printed to indicate that a lock
 100  * has occurred).  On some devices, queue full is returned for a temporary
 101  * resource shortage.  These devices will return queue full at varying
 102  * depths.  The driver will throttle back when the queue fulls occur and
 103  * attempt to slowly increase the depth over time as the device recovers
 104  * from the resource shortage.
 105  *
 106  * In this example, the first line will disable tagged queueing for all
 107  * the devices on the first probed aic79xx adapter.
 108  *
 109  * The second line enables tagged queueing with 4 commands/LUN for IDs
 110  * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
 111  * driver to attempt to use up to 64 tags for ID 1.
 112  *
 113  * The third line is the same as the first line.
 114  *
 115  * The fourth line disables tagged queueing for devices 0 and 3.  It
 116  * enables tagged queueing for the other IDs, with 16 commands/LUN
 117  * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
 118  * IDs 2, 5-7, and 9-15.
 119  */
 120
 121 /*
 122  * NOTE: The below structure is for reference only, the actual structure
 123  *       to modify in order to change things is just below this comment block.
 124 adapter_tag_info_t aic79xx_tag_info[] =
 125 {
 126         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 127         {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
 128         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
 129         {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
 130 };
 131 */
 132
 133 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
 134 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
 135 #else
 136 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
 137 #endif
 138
 139 #define AIC79XX_CONFIGED_TAG_COMMANDS {                                 \
 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         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE                \
 148 }
 149
 150 /*
 151  * By default, use the number of commands specified by
 152  * the users kernel configuration.
 153  */
 154 static adapter_tag_info_t aic79xx_tag_info[] =
 155 {
 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         {AIC79XX_CONFIGED_TAG_COMMANDS}
 172 };
 173
 174 /*
 175  * The I/O cell on the chip is very configurable in respect to its analog
 176  * characteristics.  Set the defaults here; they can be overriden with
 177  * the proper insmod parameters.
 178  */
 179 struct ahd_linux_iocell_opts
 180 {
 181         uint8_t precomp;
 182         uint8_t slewrate;
 183         uint8_t amplitude;
 184 };
 185 #define AIC79XX_DEFAULT_PRECOMP         0xFF
 186 #define AIC79XX_DEFAULT_SLEWRATE        0xFF
 187 #define AIC79XX_DEFAULT_AMPLITUDE       0xFF
 188 #define AIC79XX_DEFAULT_IOOPTS                  \
 189 {                                               \
 190         AIC79XX_DEFAULT_PRECOMP,                \
 191         AIC79XX_DEFAULT_SLEWRATE,               \
 192         AIC79XX_DEFAULT_AMPLITUDE               \
 193 }
 194 #define AIC79XX_PRECOMP_INDEX   0
 195 #define AIC79XX_SLEWRATE_INDEX  1
 196 #define AIC79XX_AMPLITUDE_INDEX 2
 197 static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
 198 {
 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         AIC79XX_DEFAULT_IOOPTS
 215 };
 216
 217 /*
 218  * There should be a specific return value for this in scsi.h, but
 219  * it seems that most drivers ignore it.
 220  */
 221 #define DID_UNDERFLOW   DID_ERROR
 222
 223 void
 224 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
 225 {
 226         printk("(scsi%d:%c:%d:%d): ",
 227                ahd->platform_data->host->host_no,
 228                scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
 229                scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
 230                scb != NULL ? SCB_GET_LUN(scb) : -1);
 231 }
 232
 233 /*
 234  * XXX - these options apply unilaterally to _all_ adapters
 235  *       cards in the system.  This should be fixed.  Exceptions to this
 236  *       rule are noted in the comments.
 237  */
 238
 239 /*
 240  * Skip the scsi bus reset.  Non 0 make us skip the reset at startup.  This
 241  * has no effect on any later resets that might occur due to things like
 242  * SCSI bus timeouts.
 243  */
 244 static uint32_t aic79xx_no_reset;
 245
 246 /*
 247  * Should we force EXTENDED translation on a controller.
 248  *     0 == Use whatever is in the SEEPROM or default to off
 249  *     1 == Use whatever is in the SEEPROM or default to on
 250  */
 251 static uint32_t aic79xx_extended;
 252
 253 /*
 254  * PCI bus parity checking of the Adaptec controllers.  This is somewhat
 255  * dubious at best.  To my knowledge, this option has never actually
 256  * solved a PCI parity problem, but on certain machines with broken PCI
 257  * chipset configurations, it can generate tons of false error messages.
 258  * It's included in the driver for completeness.
 259  *   0     = Shut off PCI parity check
 260  *   non-0 = Enable PCI parity check
 261  *
 262  * NOTE: you can't actually pass -1 on the lilo prompt.  So, to set this
 263  * variable to -1 you would actually want to simply pass the variable
 264  * name without a number.  That will invert the 0 which will result in
 265  * -1.
 266  */
 267 static uint32_t aic79xx_pci_parity = ~0;
 268
 269 /*
 270  * There are lots of broken chipsets in the world.  Some of them will
 271  * violate the PCI spec when we issue byte sized memory writes to our
 272  * controller.  I/O mapped register access, if allowed by the given
 273  * platform, will work in almost all cases.
 274  */
 275 uint32_t aic79xx_allow_memio = ~0;
 276
 277 /*
 278  * So that we can set how long each device is given as a selection timeout.
 279  * The table of values goes like this:
 280  *   0 - 256ms
 281  *   1 - 128ms
 282  *   2 - 64ms
 283  *   3 - 32ms
 284  * We default to 256ms because some older devices need a longer time
 285  * to respond to initial selection.
 286  */
 287 static uint32_t aic79xx_seltime;
 288
 289 /*
 290  * Certain devices do not perform any aging on commands.  Should the
 291  * device be saturated by commands in one portion of the disk, it is
 292  * possible for transactions on far away sectors to never be serviced.
 293  * To handle these devices, we can periodically send an ordered tag to
 294  * force all outstanding transactions to be serviced prior to a new
 295  * transaction.
 296  */
 297 static uint32_t aic79xx_periodic_otag;
 298
 299 /* Some storage boxes are using an LSI chip which has a bug making it
 300  * impossible to use aic79xx Rev B chip in 320 speeds.  The following
 301  * storage boxes have been reported to be buggy:
 302  * EonStor 3U 16-Bay: U16U-G3A3
 303  * EonStor 2U 12-Bay: U12U-G3A3
 304  * SentinelRAID: 2500F R5 / R6
 305  * SentinelRAID: 2500F R1
 306  * SentinelRAID: 2500F/1500F
 307  * SentinelRAID: 150F
 308  *
 309  * To get around this LSI bug, you can set your board to 160 mode
 310  * or you can enable the SLOWCRC bit.
 311  */
 312 uint32_t aic79xx_slowcrc;
 313
 314 /*
 315  * Module information and settable options.
 316  */
 317 static char *aic79xx = NULL;
 318
 319 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
 320 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
 321 MODULE_LICENSE("Dual BSD/GPL");
 322 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
 323 module_param(aic79xx, charp, 0444);
 324 MODULE_PARM_DESC(aic79xx,
 325 "period-delimited options string:\n"
 326 "       verbose                 Enable verbose/diagnostic logging\n"
 327 "       allow_memio             Allow device registers to be memory mapped\n"
 328 "       debug                   Bitmask of debug values to enable\n"
 329 "       no_reset                Suppress initial bus resets\n"
 330 "       extended                Enable extended geometry on all controllers\n"
 331 "       periodic_otag           Send an ordered tagged transaction\n"
 332 "                               periodically to prevent tag starvation.\n"
 333 "                               This may be required by some older disk\n"
 334 "                               or drives/RAID arrays.\n"
 335 "       tag_info:<tag_str>      Set per-target tag depth\n"
 336 "       global_tag_depth:<int>  Global tag depth for all targets on all buses\n"
 337 "       slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
 338 "       precomp:<pcomp_list>    Set the signal precompensation (0-7).\n"
 339 "       amplitude:<int>         Set the signal amplitude (0-7).\n"
 340 "       seltime:<int>           Selection Timeout:\n"
 341 "                               (0/256ms,1/128ms,2/64ms,3/32ms)\n"
 342 "       slowcrc                 Turn on the SLOWCRC bit (Rev B only)\n"
 343 "\n"
 344 "       Sample modprobe configuration file:\n"
 345 "       #       Enable verbose logging\n"
 346 "       #       Set tag depth on Controller 2/Target 2 to 10 tags\n"
 347 "       #       Shorten the selection timeout to 128ms\n"
 348 "\n"
 349 "       options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
 350 );
 351
 352 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
 353                                          struct scsi_device *,
 354                                          struct scb *);
 355 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
 356                                          struct scsi_cmnd *cmd);
 357 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
 358 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
 359 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
 360                                      struct ahd_devinfo *devinfo);
 361 static void ahd_linux_device_queue_depth(struct scsi_device *);
 362 static int ahd_linux_run_command(struct ahd_softc*,
 363                                  struct ahd_linux_device *,
 364                                  struct scsi_cmnd *);
 365 static void ahd_linux_setup_tag_info_global(char *p);
 366 static int  aic79xx_setup(char *c);
 367 static void ahd_freeze_simq(struct ahd_softc *ahd);
 368 static void ahd_release_simq(struct ahd_softc *ahd);
 369
 370 static int ahd_linux_unit;
 371
 372
 373 /************************** OS Utility Wrappers *******************************/
 374 void ahd_delay(long);
 375 void
 376 ahd_delay(long usec)
 377 {
 378         /*
 379          * udelay on Linux can have problems for
 380          * multi-millisecond waits.  Wait at most
 381          * 1024us per call.
 382          */
 383         while (usec > 0) {
 384                 udelay(usec % 1024);
 385                 usec -= 1024;
 386         }
 387 }
 388
 389
 390 /***************************** Low Level I/O **********************************/
 391 uint8_t ahd_inb(struct ahd_softc * ahd, long port);
 392 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
 393 void ahd_outw_atomic(struct ahd_softc * ahd,
 394                                      long port, uint16_t val);
 395 void ahd_outsb(struct ahd_softc * ahd, long port,
 396                                uint8_t *, int count);
 397 void ahd_insb(struct ahd_softc * ahd, long port,
 398                                uint8_t *, int count);
 399
 400 uint8_t
 401 ahd_inb(struct ahd_softc * ahd, long port)
 402 {
 403         uint8_t x;
 404
 405         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 406                 x = readb(ahd->bshs[0].maddr + port);
 407         } else {
 408                 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
 409         }
 410         mb();
 411         return (x);
 412 }
 413
 414 #if 0 /* unused */
 415 static uint16_t
 416 ahd_inw_atomic(struct ahd_softc * ahd, long port)
 417 {
 418         uint8_t x;
 419
 420         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 421                 x = readw(ahd->bshs[0].maddr + port);
 422         } else {
 423                 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
 424         }
 425         mb();
 426         return (x);
 427 }
 428 #endif
 429
 430 void
 431 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
 432 {
 433         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 434                 writeb(val, ahd->bshs[0].maddr + port);
 435         } else {
 436                 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
 437         }
 438         mb();
 439 }
 440
 441 void
 442 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
 443 {
 444         if (ahd->tags[0] == BUS_SPACE_MEMIO) {
 445                 writew(val, ahd->bshs[0].maddr + port);
 446         } else {
 447                 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
 448         }
 449         mb();
 450 }
 451
 452 void
 453 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
 454 {
 455         int i;
 456
 457         /*
 458          * There is probably a more efficient way to do this on Linux
 459          * but we don't use this for anything speed critical and this
 460          * should work.
 461          */
 462         for (i = 0; i < count; i++)
 463                 ahd_outb(ahd, port, *array++);
 464 }
 465
 466 void
 467 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
 468 {
 469         int i;
 470
 471         /*
 472          * There is probably a more efficient way to do this on Linux
 473          * but we don't use this for anything speed critical and this
 474          * should work.
 475          */
 476         for (i = 0; i < count; i++)
 477                 *array++ = ahd_inb(ahd, port);
 478 }
 479
 480 /******************************* PCI Routines *********************************/
 481 uint32_t
 482 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
 483 {
 484         switch (width) {
 485         case 1:
 486         {
 487                 uint8_t retval;
 488
 489                 pci_read_config_byte(pci, reg, &retval);
 490                 return (retval);
 491         }
 492         case 2:
 493         {
 494                 uint16_t retval;
 495                 pci_read_config_word(pci, reg, &retval);
 496                 return (retval);
 497         }
 498         case 4:
 499         {
 500                 uint32_t retval;
 501                 pci_read_config_dword(pci, reg, &retval);
 502                 return (retval);
 503         }
 504         default:
 505                 panic("ahd_pci_read_config: Read size too big");
 506                 /* NOTREACHED */
 507                 return (0);
 508         }
 509 }
 510
 511 void
 512 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
 513 {
 514         switch (width) {
 515         case 1:
 516                 pci_write_config_byte(pci, reg, value);
 517                 break;
 518         case 2:
 519                 pci_write_config_word(pci, reg, value);
 520                 break;
 521         case 4:
 522                 pci_write_config_dword(pci, reg, value);
 523                 break;
 524         default:
 525                 panic("ahd_pci_write_config: Write size too big");
 526                 /* NOTREACHED */
 527         }
 528 }
 529
 530 /****************************** Inlines ***************************************/
 531 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
 532
 533 static void
 534 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
 535 {
 536         struct scsi_cmnd *cmd;
 537
 538         cmd = scb->io_ctx;
 539         ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
 540         scsi_dma_unmap(cmd);
 541 }
 542
 543 /******************************** Macros **************************************/
 544 #define BUILD_SCSIID(ahd, cmd)                                          \
 545         (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
 546
 547 /*
 548  * Return a string describing the driver.
 549  */
 550 static const char *
 551 ahd_linux_info(struct Scsi_Host *host)
 552 {
 553         static char buffer[512];
 554         char    ahd_info[256];
 555         char   *bp;
 556         struct ahd_softc *ahd;
 557
 558         bp = &buffer[0];
 559         ahd = *(struct ahd_softc **)host->hostdata;
 560         memset(bp, 0, sizeof(buffer));
 561         strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
 562                         "        <");
 563         strcat(bp, ahd->description);
 564         strcat(bp, ">\n"
 565                         "        ");
 566         ahd_controller_info(ahd, ahd_info);
 567         strcat(bp, ahd_info);
 568
 569         return (bp);
 570 }
 571
 572 /*
 573  * Queue an SCB to the controller.
 574  */
 575 static int
 576 ahd_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
 577 {
 578         struct   ahd_softc *ahd;
 579         struct   ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
 580         int rtn = SCSI_MLQUEUE_HOST_BUSY;
 581
 582         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 583
 584         cmd->scsi_done = scsi_done;
 585         cmd->result = CAM_REQ_INPROG << 16;
 586         rtn = ahd_linux_run_command(ahd, dev, cmd);
 587
 588         return rtn;
 589 }
 590
 591 static DEF_SCSI_QCMD(ahd_linux_queue)
 592
 593 static struct scsi_target **
 594 ahd_linux_target_in_softc(struct scsi_target *starget)
 595 {
 596         struct  ahd_softc *ahd =
 597                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 598         unsigned int target_offset;
 599
 600         target_offset = starget->id;
 601         if (starget->channel != 0)
 602                 target_offset += 8;
 603
 604         return &ahd->platform_data->starget[target_offset];
 605 }
 606
 607 static int
 608 ahd_linux_target_alloc(struct scsi_target *starget)
 609 {
 610         struct  ahd_softc *ahd =
 611                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
 612         struct seeprom_config *sc = ahd->seep_config;
 613         unsigned long flags;
 614         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 615         struct ahd_devinfo devinfo;
 616         struct ahd_initiator_tinfo *tinfo;
 617         struct ahd_tmode_tstate *tstate;
 618         char channel = starget->channel + 'A';
 619
 620         ahd_lock(ahd, &flags);
 621
 622         BUG_ON(*ahd_targp != NULL);
 623
 624         *ahd_targp = starget;
 625
 626         if (sc) {
 627                 int flags = sc->device_flags[starget->id];
 628
 629                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 630                                             starget->id, &tstate);
 631
 632                 if ((flags  & CFPACKETIZED) == 0) {
 633                         /* don't negotiate packetized (IU) transfers */
 634                         spi_max_iu(starget) = 0;
 635                 } else {
 636                         if ((ahd->features & AHD_RTI) == 0)
 637                                 spi_rti(starget) = 0;
 638                 }
 639
 640                 if ((flags & CFQAS) == 0)
 641                         spi_max_qas(starget) = 0;
 642
 643                 /* Transinfo values have been set to BIOS settings */
 644                 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
 645                 spi_min_period(starget) = tinfo->user.period;
 646                 spi_max_offset(starget) = tinfo->user.offset;
 647         }
 648
 649         tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
 650                                     starget->id, &tstate);
 651         ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
 652                             CAM_LUN_WILDCARD, channel,
 653                             ROLE_INITIATOR);
 654         ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
 655                          AHD_TRANS_GOAL, /*paused*/FALSE);
 656         ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
 657                       AHD_TRANS_GOAL, /*paused*/FALSE);
 658         ahd_unlock(ahd, &flags);
 659
 660         return 0;
 661 }
 662
 663 static void
 664 ahd_linux_target_destroy(struct scsi_target *starget)
 665 {
 666         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
 667
 668         *ahd_targp = NULL;
 669 }
 670
 671 static int
 672 ahd_linux_slave_alloc(struct scsi_device *sdev)
 673 {
 674         struct  ahd_softc *ahd =
 675                 *((struct ahd_softc **)sdev->host->hostdata);
 676         struct ahd_linux_device *dev;
 677
 678         if (bootverbose)
 679                 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
 680
 681         dev = scsi_transport_device_data(sdev);
 682         memset(dev, 0, sizeof(*dev));
 683
 684         /*
 685          * We start out life using untagged
 686          * transactions of which we allow one.
 687          */
 688         dev->openings = 1;
 689
 690         /*
 691          * Set maxtags to 0.  This will be changed if we
 692          * later determine that we are dealing with
 693          * a tagged queuing capable device.
 694          */
 695         dev->maxtags = 0;
 696
 697         return (0);
 698 }
 699
 700 static int
 701 ahd_linux_slave_configure(struct scsi_device *sdev)
 702 {
 703         struct  ahd_softc *ahd;
 704
 705         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 706         if (bootverbose)
 707                 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
 708
 709         ahd_linux_device_queue_depth(sdev);
 710
 711         /* Initial Domain Validation */
 712         if (!spi_initial_dv(sdev->sdev_target))
 713                 spi_dv_device(sdev);
 714
 715         return 0;
 716 }
 717
 718 #if defined(__i386__)
 719 /*
 720  * Return the disk geometry for the given SCSI device.
 721  */
 722 static int
 723 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 724                     sector_t capacity, int geom[])
 725 {
 726         uint8_t *bh;
 727         int      heads;
 728         int      sectors;
 729         int      cylinders;
 730         int      ret;
 731         int      extended;
 732         struct   ahd_softc *ahd;
 733
 734         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 735
 736         bh = scsi_bios_ptable(bdev);
 737         if (bh) {
 738                 ret = scsi_partsize(bh, capacity,
 739                                     &geom[2], &geom[0], &geom[1]);
 740                 kfree(bh);
 741                 if (ret != -1)
 742                         return (ret);
 743         }
 744         heads = 64;
 745         sectors = 32;
 746         cylinders = aic_sector_div(capacity, heads, sectors);
 747
 748         if (aic79xx_extended != 0)
 749                 extended = 1;
 750         else
 751                 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
 752         if (extended && cylinders >= 1024) {
 753                 heads = 255;
 754                 sectors = 63;
 755                 cylinders = aic_sector_div(capacity, heads, sectors);
 756         }
 757         geom[0] = heads;
 758         geom[1] = sectors;
 759         geom[2] = cylinders;
 760         return (0);
 761 }
 762 #endif
 763
 764 /*
 765  * Abort the current SCSI command(s).
 766  */
 767 static int
 768 ahd_linux_abort(struct scsi_cmnd *cmd)
 769 {
 770         int error;
 771
 772         error = ahd_linux_queue_abort_cmd(cmd);
 773
 774         return error;
 775 }
 776
 777 /*
 778  * Attempt to send a target reset message to the device that timed out.
 779  */
 780 static int
 781 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
 782 {
 783         struct ahd_softc *ahd;
 784         struct ahd_linux_device *dev;
 785         struct scb *reset_scb;
 786         u_int  cdb_byte;
 787         int    retval = SUCCESS;
 788         int    paused;
 789         int    wait;
 790         struct  ahd_initiator_tinfo *tinfo;
 791         struct  ahd_tmode_tstate *tstate;
 792         unsigned long flags;
 793         DECLARE_COMPLETION_ONSTACK(done);
 794
 795         reset_scb = NULL;
 796         paused = FALSE;
 797         wait = FALSE;
 798         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 799
 800         scmd_printk(KERN_INFO, cmd,
 801                     "Attempting to queue a TARGET RESET message:");
 802
 803         printk("CDB:");
 804         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
 805                 printk(" 0x%x", cmd->cmnd[cdb_byte]);
 806         printk("\n");
 807
 808         /*
 809          * Determine if we currently own this command.
 810          */
 811         dev = scsi_transport_device_data(cmd->device);
 812
 813         if (dev == NULL) {
 814                 /*
 815                  * No target device for this command exists,
 816                  * so we must not still own the command.
 817                  */
 818                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
 819                 return SUCCESS;
 820         }
 821
 822         /*
 823          * Generate us a new SCB
 824          */
 825         reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
 826         if (!reset_scb) {
 827                 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
 828                 return FAILED;
 829         }
 830
 831         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 832                                     cmd->device->id, &tstate);
 833         reset_scb->io_ctx = cmd;
 834         reset_scb->platform_data->dev = dev;
 835         reset_scb->sg_count = 0;
 836         ahd_set_residual(reset_scb, 0);
 837         ahd_set_sense_residual(reset_scb, 0);
 838         reset_scb->platform_data->xfer_len = 0;
 839         reset_scb->hscb->control = 0;
 840         reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
 841         reset_scb->hscb->lun = cmd->device->lun;
 842         reset_scb->hscb->cdb_len = 0;
 843         reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
 844         reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
 845         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 846                 reset_scb->flags |= SCB_PACKETIZED;
 847         } else {
 848                 reset_scb->hscb->control |= MK_MESSAGE;
 849         }
 850         dev->openings--;
 851         dev->active++;
 852         dev->commands_issued++;
 853
 854         ahd_lock(ahd, &flags);
 855
 856         LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
 857         ahd_queue_scb(ahd, reset_scb);
 858
 859         ahd->platform_data->eh_done = &done;
 860         ahd_unlock(ahd, &flags);
 861
 862         printk("%s: Device reset code sleeping\n", ahd_name(ahd));
 863         if (!wait_for_completion_timeout(&done, 5 * HZ)) {
 864                 ahd_lock(ahd, &flags);
 865                 ahd->platform_data->eh_done = NULL;
 866                 ahd_unlock(ahd, &flags);
 867                 printk("%s: Device reset timer expired (active %d)\n",
 868                        ahd_name(ahd), dev->active);
 869                 retval = FAILED;
 870         }
 871         printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
 872
 873         return (retval);
 874 }
 875
 876 /*
 877  * Reset the SCSI bus.
 878  */
 879 static int
 880 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 881 {
 882         struct ahd_softc *ahd;
 883         int    found;
 884         unsigned long flags;
 885
 886         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 887 #ifdef AHD_DEBUG
 888         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 889                 printk("%s: Bus reset called for cmd %p\n",
 890                        ahd_name(ahd), cmd);
 891 #endif
 892         ahd_lock(ahd, &flags);
 893
 894         found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 895                                   /*initiate reset*/TRUE);
 896         ahd_unlock(ahd, &flags);
 897
 898         if (bootverbose)
 899                 printk("%s: SCSI bus reset delivered. "
 900                        "%d SCBs aborted.\n", ahd_name(ahd), found);
 901
 902         return (SUCCESS);
 903 }
 904
 905 struct scsi_host_template aic79xx_driver_template = {
 906         .module                 = THIS_MODULE,
 907         .name                   = "aic79xx",
 908         .proc_name              = "aic79xx",
 909         .show_info              = ahd_linux_show_info,
 910         .write_info             = ahd_proc_write_seeprom,
 911         .info                   = ahd_linux_info,
 912         .queuecommand           = ahd_linux_queue,
 913         .eh_abort_handler       = ahd_linux_abort,
 914         .eh_device_reset_handler = ahd_linux_dev_reset,
 915         .eh_bus_reset_handler   = ahd_linux_bus_reset,
 916 #if defined(__i386__)
 917         .bios_param             = ahd_linux_biosparam,
 918 #endif
 919         .can_queue              = AHD_MAX_QUEUE,
 920         .this_id                = -1,
 921         .max_sectors            = 8192,
 922         .cmd_per_lun            = 2,
 923         .slave_alloc            = ahd_linux_slave_alloc,
 924         .slave_configure        = ahd_linux_slave_configure,
 925         .target_alloc           = ahd_linux_target_alloc,
 926         .target_destroy         = ahd_linux_target_destroy,
 927 };
 928
 929 /******************************** Bus DMA *************************************/
 930 int
 931 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
 932                    bus_size_t alignment, bus_size_t boundary,
 933                    dma_addr_t lowaddr, dma_addr_t highaddr,
 934                    bus_dma_filter_t *filter, void *filterarg,
 935                    bus_size_t maxsize, int nsegments,
 936                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
 937 {
 938         bus_dma_tag_t dmat;
 939
 940         dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
 941         if (dmat == NULL)
 942                 return (ENOMEM);
 943
 944         /*
 945          * Linux is very simplistic about DMA memory.  For now don't
 946          * maintain all specification information.  Once Linux supplies
 947          * better facilities for doing these operations, or the
 948          * needs of this particular driver change, we might need to do
 949          * more here.
 950          */
 951         dmat->alignment = alignment;
 952         dmat->boundary = boundary;
 953         dmat->maxsize = maxsize;
 954         *ret_tag = dmat;
 955         return (0);
 956 }
 957
 958 void
 959 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
 960 {
 961         kfree(dmat);
 962 }
 963
 964 int
 965 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
 966                  int flags, bus_dmamap_t *mapp)
 967 {
 968         *vaddr = pci_alloc_consistent(ahd->dev_softc,
 969                                       dmat->maxsize, mapp);
 970         if (*vaddr == NULL)
 971                 return (ENOMEM);
 972         return(0);
 973 }
 974
 975 void
 976 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
 977                 void* vaddr, bus_dmamap_t map)
 978 {
 979         pci_free_consistent(ahd->dev_softc, dmat->maxsize,
 980                             vaddr, map);
 981 }
 982
 983 int
 984 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
 985                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
 986                 void *cb_arg, int flags)
 987 {
 988         /*
 989          * Assume for now that this will only be used during
 990          * initialization and not for per-transaction buffer mapping.
 991          */
 992         bus_dma_segment_t stack_sg;
 993
 994         stack_sg.ds_addr = map;
 995         stack_sg.ds_len = dmat->maxsize;
 996         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
 997         return (0);
 998 }
 999
1000 void
1001 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1002 {
1003 }
1004
1005 int
1006 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1007 {
1008         /* Nothing to do */
1009         return (0);
1010 }
1011
1012 /********************* Platform Dependent Functions ***************************/
1013 static void
1014 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1015 {
1016
1017         if ((instance >= 0)
1018          && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1019                 uint8_t *iocell_info;
1020
1021                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1022                 iocell_info[index] = value & 0xFFFF;
1023                 if (bootverbose)
1024                         printk("iocell[%d:%ld] = %d\n", instance, index, value);
1025         }
1026 }
1027
1028 static void
1029 ahd_linux_setup_tag_info_global(char *p)
1030 {
1031         int tags, i, j;
1032
1033         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1034         printk("Setting Global Tags= %d\n", tags);
1035
1036         for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1037                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1038                         aic79xx_tag_info[i].tag_commands[j] = tags;
1039                 }
1040         }
1041 }
1042
1043 static void
1044 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1045 {
1046
1047         if ((instance >= 0) && (targ >= 0)
1048          && (instance < ARRAY_SIZE(aic79xx_tag_info))
1049          && (targ < AHD_NUM_TARGETS)) {
1050                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1051                 if (bootverbose)
1052                         printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1053         }
1054 }
1055
1056 static char *
1057 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1058                        void (*callback)(u_long, int, int, int32_t),
1059                        u_long callback_arg)
1060 {
1061         char    *tok_end;
1062         char    *tok_end2;
1063         int      i;
1064         int      instance;
1065         int      targ;
1066         int      done;
1067         char     tok_list[] = {'.', ',', '{', '}', '\0'};
1068
1069         /* All options use a ':' name/arg separator */
1070         if (*opt_arg != ':')
1071                 return (opt_arg);
1072         opt_arg++;
1073         instance = -1;
1074         targ = -1;
1075         done = FALSE;
1076         /*
1077          * Restore separator that may be in
1078          * the middle of our option argument.
1079          */
1080         tok_end = strchr(opt_arg, '\0');
1081         if (tok_end < end)
1082                 *tok_end = ',';
1083         while (!done) {
1084                 switch (*opt_arg) {
1085                 case '{':
1086                         if (instance == -1) {
1087                                 instance = 0;
1088                         } else {
1089                                 if (depth > 1) {
1090                                         if (targ == -1)
1091                                                 targ = 0;
1092                                 } else {
1093                                         printk("Malformed Option %s\n",
1094                                                opt_name);
1095                                         done = TRUE;
1096                                 }
1097                         }
1098                         opt_arg++;
1099                         break;
1100                 case '}':
1101                         if (targ != -1)
1102                                 targ = -1;
1103                         else if (instance != -1)
1104                                 instance = -1;
1105                         opt_arg++;
1106                         break;
1107                 case ',':
1108                 case '.':
1109                         if (instance == -1)
1110                                 done = TRUE;
1111                         else if (targ >= 0)
1112                                 targ++;
1113                         else if (instance >= 0)
1114                                 instance++;
1115                         opt_arg++;
1116                         break;
1117                 case '\0':
1118                         done = TRUE;
1119                         break;
1120                 default:
1121                         tok_end = end;
1122                         for (i = 0; tok_list[i]; i++) {
1123                                 tok_end2 = strchr(opt_arg, tok_list[i]);
1124                                 if ((tok_end2) && (tok_end2 < tok_end))
1125                                         tok_end = tok_end2;
1126                         }
1127                         callback(callback_arg, instance, targ,
1128                                  simple_strtol(opt_arg, NULL, 0));
1129                         opt_arg = tok_end;
1130                         break;
1131                 }
1132         }
1133         return (opt_arg);
1134 }
1135
1136 /*
1137  * Handle Linux boot parameters. This routine allows for assigning a value
1138  * to a parameter with a ':' between the parameter and the value.
1139  * ie. aic79xx=stpwlev:1,extended
1140  */
1141 static int
1142 aic79xx_setup(char *s)
1143 {
1144         int     i, n;
1145         char   *p;
1146         char   *end;
1147
1148         static const struct {
1149                 const char *name;
1150                 uint32_t *flag;
1151         } options[] = {
1152                 { "extended", &aic79xx_extended },
1153                 { "no_reset", &aic79xx_no_reset },
1154                 { "verbose", &aic79xx_verbose },
1155                 { "allow_memio", &aic79xx_allow_memio},
1156 #ifdef AHD_DEBUG
1157                 { "debug", &ahd_debug },
1158 #endif
1159                 { "periodic_otag", &aic79xx_periodic_otag },
1160                 { "pci_parity", &aic79xx_pci_parity },
1161                 { "seltime", &aic79xx_seltime },
1162                 { "tag_info", NULL },
1163                 { "global_tag_depth", NULL},
1164                 { "slewrate", NULL },
1165                 { "precomp", NULL },
1166                 { "amplitude", NULL },
1167                 { "slowcrc", &aic79xx_slowcrc },
1168         };
1169
1170         end = strchr(s, '\0');
1171
1172         /*
1173          * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1174          * will never be 0 in this case.
1175          */
1176         n = 0;
1177
1178         while ((p = strsep(&s, ",.")) != NULL) {
1179                 if (*p == '\0')
1180                         continue;
1181                 for (i = 0; i < ARRAY_SIZE(options); i++) {
1182
1183                         n = strlen(options[i].name);
1184                         if (strncmp(options[i].name, p, n) == 0)
1185                                 break;
1186                 }
1187                 if (i == ARRAY_SIZE(options))
1188                         continue;
1189
1190                 if (strncmp(p, "global_tag_depth", n) == 0) {
1191                         ahd_linux_setup_tag_info_global(p + n);
1192                 } else if (strncmp(p, "tag_info", n) == 0) {
1193                         s = ahd_parse_brace_option("tag_info", p + n, end,
1194                             2, ahd_linux_setup_tag_info, 0);
1195                 } else if (strncmp(p, "slewrate", n) == 0) {
1196                         s = ahd_parse_brace_option("slewrate",
1197                             p + n, end, 1, ahd_linux_setup_iocell_info,
1198                             AIC79XX_SLEWRATE_INDEX);
1199                 } else if (strncmp(p, "precomp", n) == 0) {
1200                         s = ahd_parse_brace_option("precomp",
1201                             p + n, end, 1, ahd_linux_setup_iocell_info,
1202                             AIC79XX_PRECOMP_INDEX);
1203                 } else if (strncmp(p, "amplitude", n) == 0) {
1204                         s = ahd_parse_brace_option("amplitude",
1205                             p + n, end, 1, ahd_linux_setup_iocell_info,
1206                             AIC79XX_AMPLITUDE_INDEX);
1207                 } else if (p[n] == ':') {
1208                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1209                 } else if (!strncmp(p, "verbose", n)) {
1210                         *(options[i].flag) = 1;
1211                 } else {
1212                         *(options[i].flag) ^= 0xFFFFFFFF;
1213                 }
1214         }
1215         return 1;
1216 }
1217
1218 __setup("aic79xx=", aic79xx_setup);
1219
1220 uint32_t aic79xx_verbose;
1221
1222 int
1223 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1224 {
1225         char    buf[80];
1226         struct  Scsi_Host *host;
1227         char    *new_name;
1228         u_long  s;
1229         int     retval;
1230
1231         template->name = ahd->description;
1232         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1233         if (host == NULL)
1234                 return (ENOMEM);
1235
1236         *((struct ahd_softc **)host->hostdata) = ahd;
1237         ahd->platform_data->host = host;
1238         host->can_queue = AHD_MAX_QUEUE;
1239         host->cmd_per_lun = 2;
1240         host->sg_tablesize = AHD_NSEG;
1241         host->this_id = ahd->our_id;
1242         host->irq = ahd->platform_data->irq;
1243         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1244         host->max_lun = AHD_NUM_LUNS;
1245         host->max_channel = 0;
1246         host->sg_tablesize = AHD_NSEG;
1247         ahd_lock(ahd, &s);
1248         ahd_set_unit(ahd, ahd_linux_unit++);
1249         ahd_unlock(ahd, &s);
1250         sprintf(buf, "scsi%d", host->host_no);
1251         new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1252         if (new_name != NULL) {
1253                 strcpy(new_name, buf);
1254                 ahd_set_name(ahd, new_name);
1255         }
1256         host->unique_id = ahd->unit;
1257         ahd_linux_initialize_scsi_bus(ahd);
1258         ahd_intr_enable(ahd, TRUE);
1259
1260         host->transportt = ahd_linux_transport_template;
1261
1262         retval = scsi_add_host(host, &ahd->dev_softc->dev);
1263         if (retval) {
1264                 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1265                 scsi_host_put(host);
1266                 return retval;
1267         }
1268
1269         scsi_scan_host(host);
1270         return 0;
1271 }
1272
1273 /*
1274  * Place the SCSI bus into a known state by either resetting it,
1275  * or forcing transfer negotiations on the next command to any
1276  * target.
1277  */
1278 static void
1279 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1280 {
1281         u_int target_id;
1282         u_int numtarg;
1283         unsigned long s;
1284
1285         target_id = 0;
1286         numtarg = 0;
1287
1288         if (aic79xx_no_reset != 0)
1289                 ahd->flags &= ~AHD_RESET_BUS_A;
1290
1291         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1292                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1293         else
1294                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1295
1296         ahd_lock(ahd, &s);
1297
1298         /*
1299          * Force negotiation to async for all targets that
1300          * will not see an initial bus reset.
1301          */
1302         for (; target_id < numtarg; target_id++) {
1303                 struct ahd_devinfo devinfo;
1304                 struct ahd_initiator_tinfo *tinfo;
1305                 struct ahd_tmode_tstate *tstate;
1306
1307                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1308                                             target_id, &tstate);
1309                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1310                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1311                 ahd_update_neg_request(ahd, &devinfo, tstate,
1312                                        tinfo, AHD_NEG_ALWAYS);
1313         }
1314         ahd_unlock(ahd, &s);
1315         /* Give the bus some time to recover */
1316         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1317                 ahd_freeze_simq(ahd);
1318                 msleep(AIC79XX_RESET_DELAY);
1319                 ahd_release_simq(ahd);
1320         }
1321 }
1322
1323 int
1324 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1325 {
1326         ahd->platform_data =
1327             kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
1328         if (ahd->platform_data == NULL)
1329                 return (ENOMEM);
1330         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1331         ahd_lockinit(ahd);
1332         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1333         return (0);
1334 }
1335
1336 void
1337 ahd_platform_free(struct ahd_softc *ahd)
1338 {
1339         struct scsi_target *starget;
1340         int i;
1341
1342         if (ahd->platform_data != NULL) {
1343                 /* destroy all of the device and target objects */
1344                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1345                         starget = ahd->platform_data->starget[i];
1346                         if (starget != NULL) {
1347                                 ahd->platform_data->starget[i] = NULL;
1348                         }
1349                 }
1350
1351                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1352                         free_irq(ahd->platform_data->irq, ahd);
1353                 if (ahd->tags[0] == BUS_SPACE_PIO
1354                  && ahd->bshs[0].ioport != 0)
1355                         release_region(ahd->bshs[0].ioport, 256);
1356                 if (ahd->tags[1] == BUS_SPACE_PIO
1357                  && ahd->bshs[1].ioport != 0)
1358                         release_region(ahd->bshs[1].ioport, 256);
1359                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1360                  && ahd->bshs[0].maddr != NULL) {
1361                         iounmap(ahd->bshs[0].maddr);
1362                         release_mem_region(ahd->platform_data->mem_busaddr,
1363                                            0x1000);
1364                 }
1365                 if (ahd->platform_data->host)
1366                         scsi_host_put(ahd->platform_data->host);
1367
1368                 kfree(ahd->platform_data);
1369         }
1370 }
1371
1372 void
1373 ahd_platform_init(struct ahd_softc *ahd)
1374 {
1375         /*
1376          * Lookup and commit any modified IO Cell options.
1377          */
1378         if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1379                 const struct ahd_linux_iocell_opts *iocell_opts;
1380
1381                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1382                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1383                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1384                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1385                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1386                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1387                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1388         }
1389
1390 }
1391
1392 void
1393 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1394 {
1395         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1396                                 SCB_GET_CHANNEL(ahd, scb),
1397                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1398                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1399 }
1400
1401 void
1402 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1403                       struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1404 {
1405         struct ahd_linux_device *dev;
1406         int was_queuing;
1407         int now_queuing;
1408
1409         if (sdev == NULL)
1410                 return;
1411
1412         dev = scsi_transport_device_data(sdev);
1413
1414         if (dev == NULL)
1415                 return;
1416         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1417         switch (alg) {
1418         default:
1419         case AHD_QUEUE_NONE:
1420                 now_queuing = 0;
1421                 break;
1422         case AHD_QUEUE_BASIC:
1423                 now_queuing = AHD_DEV_Q_BASIC;
1424                 break;
1425         case AHD_QUEUE_TAGGED:
1426                 now_queuing = AHD_DEV_Q_TAGGED;
1427                 break;
1428         }
1429         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1430          && (was_queuing != now_queuing)
1431          && (dev->active != 0)) {
1432                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1433                 dev->qfrozen++;
1434         }
1435
1436         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1437         if (now_queuing) {
1438                 u_int usertags;
1439
1440                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1441                 if (!was_queuing) {
1442                         /*
1443                          * Start out aggressively and allow our
1444                          * dynamic queue depth algorithm to take
1445                          * care of the rest.
1446                          */
1447                         dev->maxtags = usertags;
1448                         dev->openings = dev->maxtags - dev->active;
1449                 }
1450                 if (dev->maxtags == 0) {
1451                         /*
1452                          * Queueing is disabled by the user.
1453                          */
1454                         dev->openings = 1;
1455                 } else if (alg == AHD_QUEUE_TAGGED) {
1456                         dev->flags |= AHD_DEV_Q_TAGGED;
1457                         if (aic79xx_periodic_otag != 0)
1458                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1459                 } else
1460                         dev->flags |= AHD_DEV_Q_BASIC;
1461         } else {
1462                 /* We can only have one opening. */
1463                 dev->maxtags = 0;
1464                 dev->openings =  1 - dev->active;
1465         }
1466
1467         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1468         case AHD_DEV_Q_BASIC:
1469         case AHD_DEV_Q_TAGGED:
1470                 scsi_change_queue_depth(sdev,
1471                                 dev->openings + dev->active);
1472                 break;
1473         default:
1474                 /*
1475                  * We allow the OS to queue 2 untagged transactions to
1476                  * us at any time even though we can only execute them
1477                  * serially on the controller/device.  This should
1478                  * remove some latency.
1479                  */
1480                 scsi_change_queue_depth(sdev, 1);
1481                 break;
1482         }
1483 }
1484
1485 int
1486 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1487                         int lun, u_int tag, role_t role, uint32_t status)
1488 {
1489         return 0;
1490 }
1491
1492 static u_int
1493 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1494 {
1495         static int warned_user;
1496         u_int tags;
1497
1498         tags = 0;
1499         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1500                 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1501
1502                         if (warned_user == 0) {
1503                                 printk(KERN_WARNING
1504 "aic79xx: WARNING: Insufficient tag_info instances\n"
1505 "aic79xx: for installed controllers.  Using defaults\n"
1506 "aic79xx: Please update the aic79xx_tag_info array in\n"
1507 "aic79xx: the aic79xx_osm.c source file.\n");
1508                                 warned_user++;
1509                         }
1510                         tags = AHD_MAX_QUEUE;
1511                 } else {
1512                         adapter_tag_info_t *tag_info;
1513
1514                         tag_info = &aic79xx_tag_info[ahd->unit];
1515                         tags = tag_info->tag_commands[devinfo->target_offset];
1516                         if (tags > AHD_MAX_QUEUE)
1517                                 tags = AHD_MAX_QUEUE;
1518                 }
1519         }
1520         return (tags);
1521 }
1522
1523 /*
1524  * Determines the queue depth for a given device.
1525  */
1526 static void
1527 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1528 {
1529         struct  ahd_devinfo devinfo;
1530         u_int   tags;
1531         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1532
1533         ahd_compile_devinfo(&devinfo,
1534                             ahd->our_id,
1535                             sdev->sdev_target->id, sdev->lun,
1536                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1537                             ROLE_INITIATOR);
1538         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1539         if (tags != 0 && sdev->tagged_supported != 0) {
1540
1541                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1542                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1543                                devinfo.lun, AC_TRANSFER_NEG);
1544                 ahd_print_devinfo(ahd, &devinfo);
1545                 printk("Tagged Queuing enabled.  Depth %d\n", tags);
1546         } else {
1547                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1548                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1549                                devinfo.lun, AC_TRANSFER_NEG);
1550         }
1551 }
1552
1553 static int
1554 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1555                       struct scsi_cmnd *cmd)
1556 {
1557         struct   scb *scb;
1558         struct   hardware_scb *hscb;
1559         struct   ahd_initiator_tinfo *tinfo;
1560         struct   ahd_tmode_tstate *tstate;
1561         u_int    col_idx;
1562         uint16_t mask;
1563         unsigned long flags;
1564         int nseg;
1565
1566         nseg = scsi_dma_map(cmd);
1567         if (nseg < 0)
1568                 return SCSI_MLQUEUE_HOST_BUSY;
1569
1570         ahd_lock(ahd, &flags);
1571
1572         /*
1573          * Get an scb to use.
1574          */
1575         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1576                                     cmd->device->id, &tstate);
1577         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1578          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1579                 col_idx = AHD_NEVER_COL_IDX;
1580         } else {
1581                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1582                                             cmd->device->lun);
1583         }
1584         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1585                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1586                 ahd_unlock(ahd, &flags);
1587                 scsi_dma_unmap(cmd);
1588                 return SCSI_MLQUEUE_HOST_BUSY;
1589         }
1590
1591         scb->io_ctx = cmd;
1592         scb->platform_data->dev = dev;
1593         hscb = scb->hscb;
1594         cmd->host_scribble = (char *)scb;
1595
1596         /*
1597          * Fill out basics of the HSCB.
1598          */
1599         hscb->control = 0;
1600         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1601         hscb->lun = cmd->device->lun;
1602         scb->hscb->task_management = 0;
1603         mask = SCB_GET_TARGET_MASK(ahd, scb);
1604
1605         if ((ahd->user_discenable & mask) != 0)
1606                 hscb->control |= DISCENB;
1607
1608         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1609                 scb->flags |= SCB_PACKETIZED;
1610
1611         if ((tstate->auto_negotiate & mask) != 0) {
1612                 scb->flags |= SCB_AUTO_NEGOTIATE;
1613                 scb->hscb->control |= MK_MESSAGE;
1614         }
1615
1616         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1617                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1618                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1619                         hscb->control |= MSG_ORDERED_TASK;
1620                         dev->commands_since_idle_or_otag = 0;
1621                 } else {
1622                         hscb->control |= MSG_SIMPLE_TASK;
1623                 }
1624         }
1625
1626         hscb->cdb_len = cmd->cmd_len;
1627         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1628
1629         scb->platform_data->xfer_len = 0;
1630         ahd_set_residual(scb, 0);
1631         ahd_set_sense_residual(scb, 0);
1632         scb->sg_count = 0;
1633
1634         if (nseg > 0) {
1635                 void *sg = scb->sg_list;
1636                 struct scatterlist *cur_seg;
1637                 int i;
1638
1639                 scb->platform_data->xfer_len = 0;
1640
1641                 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1642                         dma_addr_t addr;
1643                         bus_size_t len;
1644
1645                         addr = sg_dma_address(cur_seg);
1646                         len = sg_dma_len(cur_seg);
1647                         scb->platform_data->xfer_len += len;
1648                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1649                                           i == (nseg - 1));
1650                 }
1651         }
1652
1653         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1654         dev->openings--;
1655         dev->active++;
1656         dev->commands_issued++;
1657
1658         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1659                 dev->commands_since_idle_or_otag++;
1660         scb->flags |= SCB_ACTIVE;
1661         ahd_queue_scb(ahd, scb);
1662
1663         ahd_unlock(ahd, &flags);
1664
1665         return 0;
1666 }
1667
1668 /*
1669  * SCSI controller interrupt handler.
1670  */
1671 irqreturn_t
1672 ahd_linux_isr(int irq, void *dev_id)
1673 {
1674         struct  ahd_softc *ahd;
1675         u_long  flags;
1676         int     ours;
1677
1678         ahd = (struct ahd_softc *) dev_id;
1679         ahd_lock(ahd, &flags);
1680         ours = ahd_intr(ahd);
1681         ahd_unlock(ahd, &flags);
1682         return IRQ_RETVAL(ours);
1683 }
1684
1685 void
1686 ahd_send_async(struct ahd_softc *ahd, char channel,
1687                u_int target, u_int lun, ac_code code)
1688 {
1689         switch (code) {
1690         case AC_TRANSFER_NEG:
1691         {
1692                 struct  scsi_target *starget;
1693                 struct  ahd_initiator_tinfo *tinfo;
1694                 struct  ahd_tmode_tstate *tstate;
1695                 unsigned int target_ppr_options;
1696
1697                 BUG_ON(target == CAM_TARGET_WILDCARD);
1698
1699                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1700                                             target, &tstate);
1701
1702                 /*
1703                  * Don't bother reporting results while
1704                  * negotiations are still pending.
1705                  */
1706                 if (tinfo->curr.period != tinfo->goal.period
1707                  || tinfo->curr.width != tinfo->goal.width
1708                  || tinfo->curr.offset != tinfo->goal.offset
1709                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1710                         if (bootverbose == 0)
1711                                 break;
1712
1713                 /*
1714                  * Don't bother reporting results that
1715                  * are identical to those last reported.
1716                  */
1717                 starget = ahd->platform_data->starget[target];
1718                 if (starget == NULL)
1719                         break;
1720
1721                 target_ppr_options =
1722                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1723                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1724                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1725                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1726                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1727                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1728                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1729                         + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1730
1731                 if (tinfo->curr.period == spi_period(starget)
1732                     && tinfo->curr.width == spi_width(starget)
1733                     && tinfo->curr.offset == spi_offset(starget)
1734                  && tinfo->curr.ppr_options == target_ppr_options)
1735                         if (bootverbose == 0)
1736                                 break;
1737
1738                 spi_period(starget) = tinfo->curr.period;
1739                 spi_width(starget) = tinfo->curr.width;
1740                 spi_offset(starget) = tinfo->curr.offset;
1741                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1742                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1743                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1744                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1745                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1746                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1747                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1748                 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1749                 spi_display_xfer_agreement(starget);
1750                 break;
1751         }
1752         case AC_SENT_BDR:
1753         {
1754                 WARN_ON(lun != CAM_LUN_WILDCARD);
1755                 scsi_report_device_reset(ahd->platform_data->host,
1756                                          channel - 'A', target);
1757                 break;
1758         }
1759         case AC_BUS_RESET:
1760                 if (ahd->platform_data->host != NULL) {
1761                         scsi_report_bus_reset(ahd->platform_data->host,
1762                                               channel - 'A');
1763                 }
1764                 break;
1765         default:
1766                 panic("ahd_send_async: Unexpected async event");
1767         }
1768 }
1769
1770 /*
1771  * Calls the higher level scsi done function and frees the scb.
1772  */
1773 void
1774 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1775 {
1776         struct scsi_cmnd *cmd;
1777         struct    ahd_linux_device *dev;
1778
1779         if ((scb->flags & SCB_ACTIVE) == 0) {
1780                 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1781                 ahd_dump_card_state(ahd);
1782                 panic("Stopping for safety");
1783         }
1784         LIST_REMOVE(scb, pending_links);
1785         cmd = scb->io_ctx;
1786         dev = scb->platform_data->dev;
1787         dev->active--;
1788         dev->openings++;
1789         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1790                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1791                 dev->qfrozen--;
1792         }
1793         ahd_linux_unmap_scb(ahd, scb);
1794
1795         /*
1796          * Guard against stale sense data.
1797          * The Linux mid-layer assumes that sense
1798          * was retrieved anytime the first byte of
1799          * the sense buffer looks "sane".
1800          */
1801         cmd->sense_buffer[0] = 0;
1802         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1803                 uint32_t amount_xferred;
1804
1805                 amount_xferred =
1806                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1807                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1808 #ifdef AHD_DEBUG
1809                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1810                                 ahd_print_path(ahd, scb);
1811                                 printk("Set CAM_UNCOR_PARITY\n");
1812                         }
1813 #endif
1814                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1815 #ifdef AHD_REPORT_UNDERFLOWS
1816                 /*
1817                  * This code is disabled by default as some
1818                  * clients of the SCSI system do not properly
1819                  * initialize the underflow parameter.  This
1820                  * results in spurious termination of commands
1821                  * that complete as expected (e.g. underflow is
1822                  * allowed as command can return variable amounts
1823                  * of data.
1824                  */
1825                 } else if (amount_xferred < scb->io_ctx->underflow) {
1826                         u_int i;
1827
1828                         ahd_print_path(ahd, scb);
1829                         printk("CDB:");
1830                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1831                                 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1832                         printk("\n");
1833                         ahd_print_path(ahd, scb);
1834                         printk("Saw underflow (%ld of %ld bytes). "
1835                                "Treated as error\n",
1836                                 ahd_get_residual(scb),
1837                                 ahd_get_transfer_length(scb));
1838                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1839 #endif
1840                 } else {
1841                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1842                 }
1843         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1844                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1845         }
1846
1847         if (dev->openings == 1
1848          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1849          && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1850                 dev->tag_success_count++;
1851         /*
1852          * Some devices deal with temporary internal resource
1853          * shortages by returning queue full.  When the queue
1854          * full occurrs, we throttle back.  Slowly try to get
1855          * back to our previous queue depth.
1856          */
1857         if ((dev->openings + dev->active) < dev->maxtags
1858          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1859                 dev->tag_success_count = 0;
1860                 dev->openings++;
1861         }
1862
1863         if (dev->active == 0)
1864                 dev->commands_since_idle_or_otag = 0;
1865
1866         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1867                 printk("Recovery SCB completes\n");
1868                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1869                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1870                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1871
1872                 if (ahd->platform_data->eh_done)
1873                         complete(ahd->platform_data->eh_done);
1874         }
1875
1876         ahd_free_scb(ahd, scb);
1877         ahd_linux_queue_cmd_complete(ahd, cmd);
1878 }
1879
1880 static void
1881 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1882                              struct scsi_device *sdev, struct scb *scb)
1883 {
1884         struct  ahd_devinfo devinfo;
1885         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1886
1887         ahd_compile_devinfo(&devinfo,
1888                             ahd->our_id,
1889                             sdev->sdev_target->id, sdev->lun,
1890                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1891                             ROLE_INITIATOR);
1892
1893         /*
1894          * We don't currently trust the mid-layer to
1895          * properly deal with queue full or busy.  So,
1896          * when one occurs, we tell the mid-layer to
1897          * unconditionally requeue the command to us
1898          * so that we can retry it ourselves.  We also
1899          * implement our own throttling mechanism so
1900          * we don't clobber the device with too many
1901          * commands.
1902          */
1903         switch (ahd_get_scsi_status(scb)) {
1904         default:
1905                 break;
1906         case SCSI_STATUS_CHECK_COND:
1907         case SCSI_STATUS_CMD_TERMINATED:
1908         {
1909                 struct scsi_cmnd *cmd;
1910
1911                 /*
1912                  * Copy sense information to the OS's cmd
1913                  * structure if it is available.
1914                  */
1915                 cmd = scb->io_ctx;
1916                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1917                         struct scsi_status_iu_header *siu;
1918                         u_int sense_size;
1919                         u_int sense_offset;
1920
1921                         if (scb->flags & SCB_SENSE) {
1922                                 sense_size = min(sizeof(struct scsi_sense_data)
1923                                                - ahd_get_sense_residual(scb),
1924                                                  (u_long)SCSI_SENSE_BUFFERSIZE);
1925                                 sense_offset = 0;
1926                         } else {
1927                                 /*
1928                                  * Copy only the sense data into the provided
1929                                  * buffer.
1930                                  */
1931                                 siu = (struct scsi_status_iu_header *)
1932                                     scb->sense_data;
1933                                 sense_size = min_t(size_t,
1934                                                 scsi_4btoul(siu->sense_length),
1935                                                 SCSI_SENSE_BUFFERSIZE);
1936                                 sense_offset = SIU_SENSE_OFFSET(siu);
1937                         }
1938
1939                         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1940                         memcpy(cmd->sense_buffer,
1941                                ahd_get_sense_buf(ahd, scb)
1942                                + sense_offset, sense_size);
1943                         cmd->result |= (DRIVER_SENSE << 24);
1944
1945 #ifdef AHD_DEBUG
1946                         if (ahd_debug & AHD_SHOW_SENSE) {
1947                                 int i;
1948
1949                                 printk("Copied %d bytes of sense data at %d:",
1950                                        sense_size, sense_offset);
1951                                 for (i = 0; i < sense_size; i++) {
1952                                         if ((i & 0xF) == 0)
1953                                                 printk("\n");
1954                                         printk("0x%x ", cmd->sense_buffer[i]);
1955                                 }
1956                                 printk("\n");
1957                         }
1958 #endif
1959                 }
1960                 break;
1961         }
1962         case SCSI_STATUS_QUEUE_FULL:
1963                 /*
1964                  * By the time the core driver has returned this
1965                  * command, all other commands that were queued
1966                  * to us but not the device have been returned.
1967                  * This ensures that dev->active is equal to
1968                  * the number of commands actually queued to
1969                  * the device.
1970                  */
1971                 dev->tag_success_count = 0;
1972                 if (dev->active != 0) {
1973                         /*
1974                          * Drop our opening count to the number
1975                          * of commands currently outstanding.
1976                          */
1977                         dev->openings = 0;
1978 #ifdef AHD_DEBUG
1979                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1980                                 ahd_print_path(ahd, scb);
1981                                 printk("Dropping tag count to %d\n",
1982                                        dev->active);
1983                         }
1984 #endif
1985                         if (dev->active == dev->tags_on_last_queuefull) {
1986
1987                                 dev->last_queuefull_same_count++;
1988                                 /*
1989                                  * If we repeatedly see a queue full
1990                                  * at the same queue depth, this
1991                                  * device has a fixed number of tag
1992                                  * slots.  Lock in this tag depth
1993                                  * so we stop seeing queue fulls from
1994                                  * this device.
1995                                  */
1996                                 if (dev->last_queuefull_same_count
1997                                  == AHD_LOCK_TAGS_COUNT) {
1998                                         dev->maxtags = dev->active;
1999                                         ahd_print_path(ahd, scb);
2000                                         printk("Locking max tag count at %d\n",
2001                                                dev->active);
2002                                 }
2003                         } else {
2004                                 dev->tags_on_last_queuefull = dev->active;
2005                                 dev->last_queuefull_same_count = 0;
2006                         }
2007                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2008                         ahd_set_scsi_status(scb, SCSI_STATUS_OK);
2009                         ahd_platform_set_tags(ahd, sdev, &devinfo,
2010                                      (dev->flags & AHD_DEV_Q_BASIC)
2011                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2012                         break;
2013                 }
2014                 /*
2015                  * Drop down to a single opening, and treat this
2016                  * as if the target returned BUSY SCSI status.
2017                  */
2018                 dev->openings = 1;
2019                 ahd_platform_set_tags(ahd, sdev, &devinfo,
2020                              (dev->flags & AHD_DEV_Q_BASIC)
2021                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2022                 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2023         }
2024 }
2025
2026 static void
2027 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2028 {
2029         int status;
2030         int new_status = DID_OK;
2031         int do_fallback = 0;
2032         int scsi_status;
2033
2034         /*
2035          * Map CAM error codes into Linux Error codes.  We
2036          * avoid the conversion so that the DV code has the
2037          * full error information available when making
2038          * state change decisions.
2039          */
2040
2041         status = ahd_cmd_get_transaction_status(cmd);
2042         switch (status) {
2043         case CAM_REQ_INPROG:
2044         case CAM_REQ_CMP:
2045                 new_status = DID_OK;
2046                 break;
2047         case CAM_AUTOSENSE_FAIL:
2048                 new_status = DID_ERROR;
2049                 /* Fallthrough */
2050         case CAM_SCSI_STATUS_ERROR:
2051                 scsi_status = ahd_cmd_get_scsi_status(cmd);
2052
2053                 switch(scsi_status) {
2054                 case SCSI_STATUS_CMD_TERMINATED:
2055                 case SCSI_STATUS_CHECK_COND:
2056                         if ((cmd->result >> 24) != DRIVER_SENSE) {
2057                                 do_fallback = 1;
2058                         } else {
2059                                 struct scsi_sense_data *sense;
2060
2061                                 sense = (struct scsi_sense_data *)
2062                                         cmd->sense_buffer;
2063                                 if (sense->extra_len >= 5 &&
2064                                     (sense->add_sense_code == 0x47
2065                                      || sense->add_sense_code == 0x48))
2066                                         do_fallback = 1;
2067                         }
2068                         break;
2069                 default:
2070                         break;
2071                 }
2072                 break;
2073         case CAM_REQ_ABORTED:
2074                 new_status = DID_ABORT;
2075                 break;
2076         case CAM_BUSY:
2077                 new_status = DID_BUS_BUSY;
2078                 break;
2079         case CAM_REQ_INVALID:
2080         case CAM_PATH_INVALID:
2081                 new_status = DID_BAD_TARGET;
2082                 break;
2083         case CAM_SEL_TIMEOUT:
2084                 new_status = DID_NO_CONNECT;
2085                 break;
2086         case CAM_SCSI_BUS_RESET:
2087         case CAM_BDR_SENT:
2088                 new_status = DID_RESET;
2089                 break;
2090         case CAM_UNCOR_PARITY:
2091                 new_status = DID_PARITY;
2092                 do_fallback = 1;
2093                 break;
2094         case CAM_CMD_TIMEOUT:
2095                 new_status = DID_TIME_OUT;
2096                 do_fallback = 1;
2097                 break;
2098         case CAM_REQ_CMP_ERR:
2099         case CAM_UNEXP_BUSFREE:
2100         case CAM_DATA_RUN_ERR:
2101                 new_status = DID_ERROR;
2102                 do_fallback = 1;
2103                 break;
2104         case CAM_UA_ABORT:
2105         case CAM_NO_HBA:
2106         case CAM_SEQUENCE_FAIL:
2107         case CAM_CCB_LEN_ERR:
2108         case CAM_PROVIDE_FAIL:
2109         case CAM_REQ_TERMIO:
2110         case CAM_UNREC_HBA_ERROR:
2111         case CAM_REQ_TOO_BIG:
2112                 new_status = DID_ERROR;
2113                 break;
2114         case CAM_REQUEUE_REQ:
2115                 new_status = DID_REQUEUE;
2116                 break;
2117         default:
2118                 /* We should never get here */
2119                 new_status = DID_ERROR;
2120                 break;
2121         }
2122
2123         if (do_fallback) {
2124                 printk("%s: device overrun (status %x) on %d:%d:%d\n",
2125                        ahd_name(ahd), status, cmd->device->channel,
2126                        cmd->device->id, (u8)cmd->device->lun);
2127         }
2128
2129         ahd_cmd_set_transaction_status(cmd, new_status);
2130
2131         cmd->scsi_done(cmd);
2132 }
2133
2134 static void
2135 ahd_freeze_simq(struct ahd_softc *ahd)
2136 {
2137         scsi_block_requests(ahd->platform_data->host);
2138 }
2139
2140 static void
2141 ahd_release_simq(struct ahd_softc *ahd)
2142 {
2143         scsi_unblock_requests(ahd->platform_data->host);
2144 }
2145
2146 static int
2147 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2148 {
2149         struct ahd_softc *ahd;
2150         struct ahd_linux_device *dev;
2151         struct scb *pending_scb;
2152         u_int  saved_scbptr;
2153         u_int  active_scbptr;
2154         u_int  last_phase;
2155         u_int  saved_scsiid;
2156         u_int  cdb_byte;
2157         int    retval;
2158         int    was_paused;
2159         int    paused;
2160         int    wait;
2161         int    disconnected;
2162         ahd_mode_state saved_modes;
2163         unsigned long flags;
2164
2165         pending_scb = NULL;
2166         paused = FALSE;
2167         wait = FALSE;
2168         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2169
2170         scmd_printk(KERN_INFO, cmd,
2171                     "Attempting to queue an ABORT message:");
2172
2173         printk("CDB:");
2174         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2175                 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2176         printk("\n");
2177
2178         ahd_lock(ahd, &flags);
2179
2180         /*
2181          * First determine if we currently own this command.
2182          * Start by searching the device queue.  If not found
2183          * there, check the pending_scb list.  If not found
2184          * at all, and the system wanted us to just abort the
2185          * command, return success.
2186          */
2187         dev = scsi_transport_device_data(cmd->device);
2188
2189         if (dev == NULL) {
2190                 /*
2191                  * No target device for this command exists,
2192                  * so we must not still own the command.
2193                  */
2194                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2195                 retval = SUCCESS;
2196                 goto no_cmd;
2197         }
2198
2199         /*
2200          * See if we can find a matching cmd in the pending list.
2201          */
2202         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2203                 if (pending_scb->io_ctx == cmd)
2204                         break;
2205         }
2206
2207         if (pending_scb == NULL) {
2208                 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2209                 goto no_cmd;
2210         }
2211
2212         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2213                 /*
2214                  * We can't queue two recovery actions using the same SCB
2215                  */
2216                 retval = FAILED;
2217                 goto  done;
2218         }
2219
2220         /*
2221          * Ensure that the card doesn't do anything
2222          * behind our back.  Also make sure that we
2223          * didn't "just" miss an interrupt that would
2224          * affect this cmd.
2225          */
2226         was_paused = ahd_is_paused(ahd);
2227         ahd_pause_and_flushwork(ahd);
2228         paused = TRUE;
2229
2230         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2231                 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2232                 goto no_cmd;
2233         }
2234
2235         printk("%s: At time of recovery, card was %spaused\n",
2236                ahd_name(ahd), was_paused ? "" : "not ");
2237         ahd_dump_card_state(ahd);
2238
2239         disconnected = TRUE;
2240         if (ahd_search_qinfifo(ahd, cmd->device->id,
2241                                cmd->device->channel + 'A',
2242                                cmd->device->lun,
2243                                pending_scb->hscb->tag,
2244                                ROLE_INITIATOR, CAM_REQ_ABORTED,
2245                                SEARCH_COMPLETE) > 0) {
2246                 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2247                        ahd_name(ahd), cmd->device->channel,
2248                        cmd->device->id, (u8)cmd->device->lun);
2249                 retval = SUCCESS;
2250                 goto done;
2251         }
2252
2253         saved_modes = ahd_save_modes(ahd);
2254         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2255         last_phase = ahd_inb(ahd, LASTPHASE);
2256         saved_scbptr = ahd_get_scbptr(ahd);
2257         active_scbptr = saved_scbptr;
2258         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2259                 struct scb *bus_scb;
2260
2261                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2262                 if (bus_scb == pending_scb)
2263                         disconnected = FALSE;
2264         }
2265
2266         /*
2267          * At this point, pending_scb is the scb associated with the
2268          * passed in command.  That command is currently active on the
2269          * bus or is in the disconnected state.
2270          */
2271         saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2272         if (last_phase != P_BUSFREE
2273             && SCB_GET_TAG(pending_scb) == active_scbptr) {
2274
2275                 /*
2276                  * We're active on the bus, so assert ATN
2277                  * and hope that the target responds.
2278                  */
2279                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2280                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2281                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2282                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2283                 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2284                 wait = TRUE;
2285         } else if (disconnected) {
2286
2287                 /*
2288                  * Actually re-queue this SCB in an attempt
2289                  * to select the device before it reconnects.
2290                  */
2291                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2292                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2293                 pending_scb->hscb->cdb_len = 0;
2294                 pending_scb->hscb->task_attribute = 0;
2295                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2296
2297                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2298                         /*
2299                          * Mark the SCB has having an outstanding
2300                          * task management function.  Should the command
2301                          * complete normally before the task management
2302                          * function can be sent, the host will be notified
2303                          * to abort our requeued SCB.
2304                          */
2305                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2306                                  pending_scb->hscb->task_management);
2307                 } else {
2308                         /*
2309                          * If non-packetized, set the MK_MESSAGE control
2310                          * bit indicating that we desire to send a message.
2311                          * We also set the disconnected flag since there is
2312                          * no guarantee that our SCB control byte matches
2313                          * the version on the card.  We don't want the
2314                          * sequencer to abort the command thinking an
2315                          * unsolicited reselection occurred.
2316                          */
2317                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2318
2319                         /*
2320                          * The sequencer will never re-reference the
2321                          * in-core SCB.  To make sure we are notified
2322                          * during reselection, set the MK_MESSAGE flag in
2323                          * the card's copy of the SCB.
2324                          */
2325                         ahd_outb(ahd, SCB_CONTROL,
2326                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2327                 }
2328
2329                 /*
2330                  * Clear out any entries in the QINFIFO first
2331                  * so we are the next SCB for this target
2332                  * to run.
2333                  */
2334                 ahd_search_qinfifo(ahd, cmd->device->id,
2335                                    cmd->device->channel + 'A', cmd->device->lun,
2336                                    SCB_LIST_NULL, ROLE_INITIATOR,
2337                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2338                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2339                 ahd_set_scbptr(ahd, saved_scbptr);
2340                 ahd_print_path(ahd, pending_scb);
2341                 printk("Device is disconnected, re-queuing SCB\n");
2342                 wait = TRUE;
2343         } else {
2344                 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2345                 retval = FAILED;
2346                 goto done;
2347         }
2348
2349 no_cmd:
2350         /*
2351          * Our assumption is that if we don't have the command, no
2352          * recovery action was required, so we return success.  Again,
2353          * the semantics of the mid-layer recovery engine are not
2354          * well defined, so this may change in time.
2355          */
2356         retval = SUCCESS;
2357 done:
2358         if (paused)
2359                 ahd_unpause(ahd);
2360         if (wait) {
2361                 DECLARE_COMPLETION_ONSTACK(done);
2362
2363                 ahd->platform_data->eh_done = &done;
2364                 ahd_unlock(ahd, &flags);
2365
2366                 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
2367                 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2368                         ahd_lock(ahd, &flags);
2369                         ahd->platform_data->eh_done = NULL;
2370                         ahd_unlock(ahd, &flags);
2371                         printk("%s: Timer Expired (active %d)\n",
2372                                ahd_name(ahd), dev->active);
2373                         retval = FAILED;
2374                 }
2375                 printk("Recovery code awake\n");
2376         } else
2377                 ahd_unlock(ahd, &flags);
2378
2379         if (retval != SUCCESS)
2380                 printk("%s: Command abort returning 0x%x\n",
2381                        ahd_name(ahd), retval);
2382
2383         return retval;
2384 }
2385
2386 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2387 {
2388         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2389         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2390         struct ahd_devinfo devinfo;
2391         unsigned long flags;
2392
2393         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2394                             starget->channel + 'A', ROLE_INITIATOR);
2395         ahd_lock(ahd, &flags);
2396         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2397         ahd_unlock(ahd, &flags);
2398 }
2399
2400 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2401 {
2402         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2403         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2404         struct ahd_tmode_tstate *tstate;
2405         struct ahd_initiator_tinfo *tinfo
2406                 = ahd_fetch_transinfo(ahd,
2407                                       starget->channel + 'A',
2408                                       shost->this_id, starget->id, &tstate);
2409         struct ahd_devinfo devinfo;
2410         unsigned int ppr_options = tinfo->goal.ppr_options;
2411         unsigned int dt;
2412         unsigned long flags;
2413         unsigned long offset = tinfo->goal.offset;
2414
2415 #ifdef AHD_DEBUG
2416         if ((ahd_debug & AHD_SHOW_DV) != 0)
2417                 printk("%s: set period to %d\n", ahd_name(ahd), period);
2418 #endif
2419         if (offset == 0)
2420                 offset = MAX_OFFSET;
2421
2422         if (period < 8)
2423                 period = 8;
2424         if (period < 10) {
2425                 if (spi_max_width(starget)) {
2426                         ppr_options |= MSG_EXT_PPR_DT_REQ;
2427                         if (period == 8)
2428                                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2429                 } else
2430                         period = 10;
2431         }
2432
2433         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2434
2435         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2436                             starget->channel + 'A', ROLE_INITIATOR);
2437
2438         /* all PPR requests apart from QAS require wide transfers */
2439         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2440                 if (spi_width(starget) == 0)
2441                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2442         }
2443
2444         ahd_find_syncrate(ahd, &period, &ppr_options,
2445                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2446
2447         ahd_lock(ahd, &flags);
2448         ahd_set_syncrate(ahd, &devinfo, period, offset,
2449                          ppr_options, AHD_TRANS_GOAL, FALSE);
2450         ahd_unlock(ahd, &flags);
2451 }
2452
2453 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2454 {
2455         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2456         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2457         struct ahd_tmode_tstate *tstate;
2458         struct ahd_initiator_tinfo *tinfo
2459                 = ahd_fetch_transinfo(ahd,
2460                                       starget->channel + 'A',
2461                                       shost->this_id, starget->id, &tstate);
2462         struct ahd_devinfo devinfo;
2463         unsigned int ppr_options = 0;
2464         unsigned int period = 0;
2465         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2466         unsigned long flags;
2467
2468 #ifdef AHD_DEBUG
2469         if ((ahd_debug & AHD_SHOW_DV) != 0)
2470                 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
2471 #endif
2472
2473         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2474                             starget->channel + 'A', ROLE_INITIATOR);
2475         if (offset != 0) {
2476                 period = tinfo->goal.period;
2477                 ppr_options = tinfo->goal.ppr_options;
2478                 ahd_find_syncrate(ahd, &period, &ppr_options,
2479                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2480         }
2481
2482         ahd_lock(ahd, &flags);
2483         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2484                          AHD_TRANS_GOAL, FALSE);
2485         ahd_unlock(ahd, &flags);
2486 }
2487
2488 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2489 {
2490         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2491         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2492         struct ahd_tmode_tstate *tstate;
2493         struct ahd_initiator_tinfo *tinfo
2494                 = ahd_fetch_transinfo(ahd,
2495                                       starget->channel + 'A',
2496                                       shost->this_id, starget->id, &tstate);
2497         struct ahd_devinfo devinfo;
2498         unsigned int ppr_options = tinfo->goal.ppr_options
2499                 & ~MSG_EXT_PPR_DT_REQ;
2500         unsigned int period = tinfo->goal.period;
2501         unsigned int width = tinfo->goal.width;
2502         unsigned long flags;
2503
2504 #ifdef AHD_DEBUG
2505         if ((ahd_debug & AHD_SHOW_DV) != 0)
2506                 printk("%s: %s DT\n", ahd_name(ahd),
2507                        dt ? "enabling" : "disabling");
2508 #endif
2509         if (dt && spi_max_width(starget)) {
2510                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2511                 if (!width)
2512                         ahd_linux_set_width(starget, 1);
2513         } else {
2514                 if (period <= 9)
2515                         period = 10; /* If resetting DT, period must be >= 25ns */
2516                 /* IU is invalid without DT set */
2517                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2518         }
2519         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2520                             starget->channel + 'A', ROLE_INITIATOR);
2521         ahd_find_syncrate(ahd, &period, &ppr_options,
2522                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2523
2524         ahd_lock(ahd, &flags);
2525         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2526                          ppr_options, AHD_TRANS_GOAL, FALSE);
2527         ahd_unlock(ahd, &flags);
2528 }
2529
2530 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2531 {
2532         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2533         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2534         struct ahd_tmode_tstate *tstate;
2535         struct ahd_initiator_tinfo *tinfo
2536                 = ahd_fetch_transinfo(ahd,
2537                                       starget->channel + 'A',
2538                                       shost->this_id, starget->id, &tstate);
2539         struct ahd_devinfo devinfo;
2540         unsigned int ppr_options = tinfo->goal.ppr_options
2541                 & ~MSG_EXT_PPR_QAS_REQ;
2542         unsigned int period = tinfo->goal.period;
2543         unsigned int dt;
2544         unsigned long flags;
2545
2546 #ifdef AHD_DEBUG
2547         if ((ahd_debug & AHD_SHOW_DV) != 0)
2548                 printk("%s: %s QAS\n", ahd_name(ahd),
2549                        qas ? "enabling" : "disabling");
2550 #endif
2551
2552         if (qas) {
2553                 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2554         }
2555
2556         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2557
2558         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2559                             starget->channel + 'A', ROLE_INITIATOR);
2560         ahd_find_syncrate(ahd, &period, &ppr_options,
2561                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2562
2563         ahd_lock(ahd, &flags);
2564         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2565                          ppr_options, AHD_TRANS_GOAL, FALSE);
2566         ahd_unlock(ahd, &flags);
2567 }
2568
2569 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2570 {
2571         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2572         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2573         struct ahd_tmode_tstate *tstate;
2574         struct ahd_initiator_tinfo *tinfo
2575                 = ahd_fetch_transinfo(ahd,
2576                                       starget->channel + 'A',
2577                                       shost->this_id, starget->id, &tstate);
2578         struct ahd_devinfo devinfo;
2579         unsigned int ppr_options = tinfo->goal.ppr_options
2580                 & ~MSG_EXT_PPR_IU_REQ;
2581         unsigned int period = tinfo->goal.period;
2582         unsigned int dt;
2583         unsigned long flags;
2584
2585 #ifdef AHD_DEBUG
2586         if ((ahd_debug & AHD_SHOW_DV) != 0)
2587                 printk("%s: %s IU\n", ahd_name(ahd),
2588                        iu ? "enabling" : "disabling");
2589 #endif
2590
2591         if (iu && spi_max_width(starget)) {
2592                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2593                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2594         }
2595
2596         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2597
2598         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2599                             starget->channel + 'A', ROLE_INITIATOR);
2600         ahd_find_syncrate(ahd, &period, &ppr_options,
2601                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2602
2603         ahd_lock(ahd, &flags);
2604         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2605                          ppr_options, AHD_TRANS_GOAL, FALSE);
2606         ahd_unlock(ahd, &flags);
2607 }
2608
2609 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2610 {
2611         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2612         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2613         struct ahd_tmode_tstate *tstate;
2614         struct ahd_initiator_tinfo *tinfo
2615                 = ahd_fetch_transinfo(ahd,
2616                                       starget->channel + 'A',
2617                                       shost->this_id, starget->id, &tstate);
2618         struct ahd_devinfo devinfo;
2619         unsigned int ppr_options = tinfo->goal.ppr_options
2620                 & ~MSG_EXT_PPR_RD_STRM;
2621         unsigned int period = tinfo->goal.period;
2622         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2623         unsigned long flags;
2624
2625 #ifdef AHD_DEBUG
2626         if ((ahd_debug & AHD_SHOW_DV) != 0)
2627                 printk("%s: %s Read Streaming\n", ahd_name(ahd),
2628                        rdstrm  ? "enabling" : "disabling");
2629 #endif
2630
2631         if (rdstrm && spi_max_width(starget))
2632                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2633
2634         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2635                             starget->channel + 'A', ROLE_INITIATOR);
2636         ahd_find_syncrate(ahd, &period, &ppr_options,
2637                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2638
2639         ahd_lock(ahd, &flags);
2640         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2641                          ppr_options, AHD_TRANS_GOAL, FALSE);
2642         ahd_unlock(ahd, &flags);
2643 }
2644
2645 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2646 {
2647         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2648         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2649         struct ahd_tmode_tstate *tstate;
2650         struct ahd_initiator_tinfo *tinfo
2651                 = ahd_fetch_transinfo(ahd,
2652                                       starget->channel + 'A',
2653                                       shost->this_id, starget->id, &tstate);
2654         struct ahd_devinfo devinfo;
2655         unsigned int ppr_options = tinfo->goal.ppr_options
2656                 & ~MSG_EXT_PPR_WR_FLOW;
2657         unsigned int period = tinfo->goal.period;
2658         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2659         unsigned long flags;
2660
2661 #ifdef AHD_DEBUG
2662         if ((ahd_debug & AHD_SHOW_DV) != 0)
2663                 printk("%s: %s Write Flow Control\n", ahd_name(ahd),
2664                        wrflow ? "enabling" : "disabling");
2665 #endif
2666
2667         if (wrflow && spi_max_width(starget))
2668                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2669
2670         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2671                             starget->channel + 'A', ROLE_INITIATOR);
2672         ahd_find_syncrate(ahd, &period, &ppr_options,
2673                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2674
2675         ahd_lock(ahd, &flags);
2676         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2677                          ppr_options, AHD_TRANS_GOAL, FALSE);
2678         ahd_unlock(ahd, &flags);
2679 }
2680
2681 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2682 {
2683         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2684         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2685         struct ahd_tmode_tstate *tstate;
2686         struct ahd_initiator_tinfo *tinfo
2687                 = ahd_fetch_transinfo(ahd,
2688                                       starget->channel + 'A',
2689                                       shost->this_id, starget->id, &tstate);
2690         struct ahd_devinfo devinfo;
2691         unsigned int ppr_options = tinfo->goal.ppr_options
2692                 & ~MSG_EXT_PPR_RTI;
2693         unsigned int period = tinfo->goal.period;
2694         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2695         unsigned long flags;
2696
2697         if ((ahd->features & AHD_RTI) == 0) {
2698 #ifdef AHD_DEBUG
2699                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2700                         printk("%s: RTI not available\n", ahd_name(ahd));
2701 #endif
2702                 return;
2703         }
2704
2705 #ifdef AHD_DEBUG
2706         if ((ahd_debug & AHD_SHOW_DV) != 0)
2707                 printk("%s: %s RTI\n", ahd_name(ahd),
2708                        rti ? "enabling" : "disabling");
2709 #endif
2710
2711         if (rti && spi_max_width(starget))
2712                 ppr_options |= MSG_EXT_PPR_RTI;
2713
2714         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2715                             starget->channel + 'A', ROLE_INITIATOR);
2716         ahd_find_syncrate(ahd, &period, &ppr_options,
2717                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2718
2719         ahd_lock(ahd, &flags);
2720         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2721                          ppr_options, AHD_TRANS_GOAL, FALSE);
2722         ahd_unlock(ahd, &flags);
2723 }
2724
2725 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2726 {
2727         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2728         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2729         struct ahd_tmode_tstate *tstate;
2730         struct ahd_initiator_tinfo *tinfo
2731                 = ahd_fetch_transinfo(ahd,
2732                                       starget->channel + 'A',
2733                                       shost->this_id, starget->id, &tstate);
2734         struct ahd_devinfo devinfo;
2735         unsigned int ppr_options = tinfo->goal.ppr_options
2736                 & ~MSG_EXT_PPR_PCOMP_EN;
2737         unsigned int period = tinfo->goal.period;
2738         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2739         unsigned long flags;
2740
2741 #ifdef AHD_DEBUG
2742         if ((ahd_debug & AHD_SHOW_DV) != 0)
2743                 printk("%s: %s Precompensation\n", ahd_name(ahd),
2744                        pcomp ? "Enable" : "Disable");
2745 #endif
2746
2747         if (pcomp && spi_max_width(starget)) {
2748                 uint8_t precomp;
2749
2750                 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2751                         const struct ahd_linux_iocell_opts *iocell_opts;
2752
2753                         iocell_opts = &aic79xx_iocell_info[ahd->unit];
2754                         precomp = iocell_opts->precomp;
2755                 } else {
2756                         precomp = AIC79XX_DEFAULT_PRECOMP;
2757                 }
2758                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2759                 AHD_SET_PRECOMP(ahd, precomp);
2760         } else {
2761                 AHD_SET_PRECOMP(ahd, 0);
2762         }
2763
2764         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2765                             starget->channel + 'A', ROLE_INITIATOR);
2766         ahd_find_syncrate(ahd, &period, &ppr_options,
2767                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2768
2769         ahd_lock(ahd, &flags);
2770         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2771                          ppr_options, AHD_TRANS_GOAL, FALSE);
2772         ahd_unlock(ahd, &flags);
2773 }
2774
2775 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2776 {
2777         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2778         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2779         struct ahd_tmode_tstate *tstate;
2780         struct ahd_initiator_tinfo *tinfo
2781                 = ahd_fetch_transinfo(ahd,
2782                                       starget->channel + 'A',
2783                                       shost->this_id, starget->id, &tstate);
2784         struct ahd_devinfo devinfo;
2785         unsigned int ppr_options = tinfo->goal.ppr_options
2786                 & ~MSG_EXT_PPR_HOLD_MCS;
2787         unsigned int period = tinfo->goal.period;
2788         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2789         unsigned long flags;
2790
2791         if (hold && spi_max_width(starget))
2792                 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2793
2794         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2795                             starget->channel + 'A', ROLE_INITIATOR);
2796         ahd_find_syncrate(ahd, &period, &ppr_options,
2797                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2798
2799         ahd_lock(ahd, &flags);
2800         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2801                          ppr_options, AHD_TRANS_GOAL, FALSE);
2802         ahd_unlock(ahd, &flags);
2803 }
2804
2805 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2806 {
2807         struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2808         unsigned long flags;
2809         u8 mode;
2810
2811         ahd_lock(ahd, &flags);
2812         ahd_pause(ahd);
2813         mode = ahd_inb(ahd, SBLKCTL);
2814         ahd_unpause(ahd);
2815         ahd_unlock(ahd, &flags);
2816
2817         if (mode & ENAB40)
2818                 spi_signalling(shost) = SPI_SIGNAL_LVD;
2819         else if (mode & ENAB20)
2820                 spi_signalling(shost) = SPI_SIGNAL_SE;
2821         else
2822                 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2823 }
2824
2825 static struct spi_function_template ahd_linux_transport_functions = {
2826         .set_offset     = ahd_linux_set_offset,
2827         .show_offset    = 1,
2828         .set_period     = ahd_linux_set_period,
2829         .show_period    = 1,
2830         .set_width      = ahd_linux_set_width,
2831         .show_width     = 1,
2832         .set_dt         = ahd_linux_set_dt,
2833         .show_dt        = 1,
2834         .set_iu         = ahd_linux_set_iu,
2835         .show_iu        = 1,
2836         .set_qas        = ahd_linux_set_qas,
2837         .show_qas       = 1,
2838         .set_rd_strm    = ahd_linux_set_rd_strm,
2839         .show_rd_strm   = 1,
2840         .set_wr_flow    = ahd_linux_set_wr_flow,
2841         .show_wr_flow   = 1,
2842         .set_rti        = ahd_linux_set_rti,
2843         .show_rti       = 1,
2844         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2845         .show_pcomp_en  = 1,
2846         .set_hold_mcs   = ahd_linux_set_hold_mcs,
2847         .show_hold_mcs  = 1,
2848         .get_signalling = ahd_linux_get_signalling,
2849 };
2850
2851 static int __init
2852 ahd_linux_init(void)
2853 {
2854         int     error = 0;
2855
2856         /*
2857          * If we've been passed any parameters, process them now.
2858          */
2859         if (aic79xx)
2860                 aic79xx_setup(aic79xx);
2861
2862         ahd_linux_transport_template =
2863                 spi_attach_transport(&ahd_linux_transport_functions);
2864         if (!ahd_linux_transport_template)
2865                 return -ENODEV;
2866
2867         scsi_transport_reserve_device(ahd_linux_transport_template,
2868                                       sizeof(struct ahd_linux_device));
2869
2870         error = ahd_linux_pci_init();
2871         if (error)
2872                 spi_release_transport(ahd_linux_transport_template);
2873         return error;
2874 }
2875
2876 static void __exit
2877 ahd_linux_exit(void)
2878 {
2879         ahd_linux_pci_exit();
2880         spi_release_transport(ahd_linux_transport_template);
2881 }
2882
2883 module_init(ahd_linux_init);
2884 module_exit(ahd_linux_exit);