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         if (bootverbose)
 704                 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
 705
 706         ahd_linux_device_queue_depth(sdev);
 707
 708         /* Initial Domain Validation */
 709         if (!spi_initial_dv(sdev->sdev_target))
 710                 spi_dv_device(sdev);
 711
 712         return 0;
 713 }
 714
 715 #if defined(__i386__)
 716 /*
 717  * Return the disk geometry for the given SCSI device.
 718  */
 719 static int
 720 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
 721                     sector_t capacity, int geom[])
 722 {
 723         int      heads;
 724         int      sectors;
 725         int      cylinders;
 726         int      extended;
 727         struct   ahd_softc *ahd;
 728
 729         ahd = *((struct ahd_softc **)sdev->host->hostdata);
 730
 731         if (scsi_partsize(bdev, capacity, geom))
 732                 return 0;
 733
 734         heads = 64;
 735         sectors = 32;
 736         cylinders = aic_sector_div(capacity, heads, sectors);
 737
 738         if (aic79xx_extended != 0)
 739                 extended = 1;
 740         else
 741                 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
 742         if (extended && cylinders >= 1024) {
 743                 heads = 255;
 744                 sectors = 63;
 745                 cylinders = aic_sector_div(capacity, heads, sectors);
 746         }
 747         geom[0] = heads;
 748         geom[1] = sectors;
 749         geom[2] = cylinders;
 750         return (0);
 751 }
 752 #endif
 753
 754 /*
 755  * Abort the current SCSI command(s).
 756  */
 757 static int
 758 ahd_linux_abort(struct scsi_cmnd *cmd)
 759 {
 760         int error;
 761
 762         error = ahd_linux_queue_abort_cmd(cmd);
 763
 764         return error;
 765 }
 766
 767 /*
 768  * Attempt to send a target reset message to the device that timed out.
 769  */
 770 static int
 771 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
 772 {
 773         struct ahd_softc *ahd;
 774         struct ahd_linux_device *dev;
 775         struct scb *reset_scb;
 776         u_int  cdb_byte;
 777         int    retval = SUCCESS;
 778         struct  ahd_initiator_tinfo *tinfo;
 779         struct  ahd_tmode_tstate *tstate;
 780         unsigned long flags;
 781         DECLARE_COMPLETION_ONSTACK(done);
 782
 783         reset_scb = NULL;
 784
 785         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 786
 787         scmd_printk(KERN_INFO, cmd,
 788                     "Attempting to queue a TARGET RESET message:");
 789
 790         printk("CDB:");
 791         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
 792                 printk(" 0x%x", cmd->cmnd[cdb_byte]);
 793         printk("\n");
 794
 795         /*
 796          * Determine if we currently own this command.
 797          */
 798         dev = scsi_transport_device_data(cmd->device);
 799
 800         if (dev == NULL) {
 801                 /*
 802                  * No target device for this command exists,
 803                  * so we must not still own the command.
 804                  */
 805                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
 806                 return SUCCESS;
 807         }
 808
 809         /*
 810          * Generate us a new SCB
 811          */
 812         reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
 813         if (!reset_scb) {
 814                 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
 815                 return FAILED;
 816         }
 817
 818         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
 819                                     cmd->device->id, &tstate);
 820         reset_scb->io_ctx = cmd;
 821         reset_scb->platform_data->dev = dev;
 822         reset_scb->sg_count = 0;
 823         ahd_set_residual(reset_scb, 0);
 824         ahd_set_sense_residual(reset_scb, 0);
 825         reset_scb->platform_data->xfer_len = 0;
 826         reset_scb->hscb->control = 0;
 827         reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
 828         reset_scb->hscb->lun = cmd->device->lun;
 829         reset_scb->hscb->cdb_len = 0;
 830         reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
 831         reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
 832         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
 833                 reset_scb->flags |= SCB_PACKETIZED;
 834         } else {
 835                 reset_scb->hscb->control |= MK_MESSAGE;
 836         }
 837         dev->openings--;
 838         dev->active++;
 839         dev->commands_issued++;
 840
 841         ahd_lock(ahd, &flags);
 842
 843         LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
 844         ahd_queue_scb(ahd, reset_scb);
 845
 846         ahd->platform_data->eh_done = &done;
 847         ahd_unlock(ahd, &flags);
 848
 849         printk("%s: Device reset code sleeping\n", ahd_name(ahd));
 850         if (!wait_for_completion_timeout(&done, 5 * HZ)) {
 851                 ahd_lock(ahd, &flags);
 852                 ahd->platform_data->eh_done = NULL;
 853                 ahd_unlock(ahd, &flags);
 854                 printk("%s: Device reset timer expired (active %d)\n",
 855                        ahd_name(ahd), dev->active);
 856                 retval = FAILED;
 857         }
 858         printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
 859
 860         return (retval);
 861 }
 862
 863 /*
 864  * Reset the SCSI bus.
 865  */
 866 static int
 867 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
 868 {
 869         struct ahd_softc *ahd;
 870         int    found;
 871         unsigned long flags;
 872
 873         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
 874 #ifdef AHD_DEBUG
 875         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
 876                 printk("%s: Bus reset called for cmd %p\n",
 877                        ahd_name(ahd), cmd);
 878 #endif
 879         ahd_lock(ahd, &flags);
 880
 881         found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
 882                                   /*initiate reset*/TRUE);
 883         ahd_unlock(ahd, &flags);
 884
 885         if (bootverbose)
 886                 printk("%s: SCSI bus reset delivered. "
 887                        "%d SCBs aborted.\n", ahd_name(ahd), found);
 888
 889         return (SUCCESS);
 890 }
 891
 892 struct scsi_host_template aic79xx_driver_template = {
 893         .module                 = THIS_MODULE,
 894         .name                   = "aic79xx",
 895         .proc_name              = "aic79xx",
 896         .show_info              = ahd_linux_show_info,
 897         .write_info             = ahd_proc_write_seeprom,
 898         .info                   = ahd_linux_info,
 899         .queuecommand           = ahd_linux_queue,
 900         .eh_abort_handler       = ahd_linux_abort,
 901         .eh_device_reset_handler = ahd_linux_dev_reset,
 902         .eh_bus_reset_handler   = ahd_linux_bus_reset,
 903 #if defined(__i386__)
 904         .bios_param             = ahd_linux_biosparam,
 905 #endif
 906         .can_queue              = AHD_MAX_QUEUE,
 907         .this_id                = -1,
 908         .max_sectors            = 8192,
 909         .cmd_per_lun            = 2,
 910         .slave_alloc            = ahd_linux_slave_alloc,
 911         .slave_configure        = ahd_linux_slave_configure,
 912         .target_alloc           = ahd_linux_target_alloc,
 913         .target_destroy         = ahd_linux_target_destroy,
 914 };
 915
 916 /******************************** Bus DMA *************************************/
 917 int
 918 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
 919                    bus_size_t alignment, bus_size_t boundary,
 920                    dma_addr_t lowaddr, dma_addr_t highaddr,
 921                    bus_dma_filter_t *filter, void *filterarg,
 922                    bus_size_t maxsize, int nsegments,
 923                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
 924 {
 925         bus_dma_tag_t dmat;
 926
 927         dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
 928         if (dmat == NULL)
 929                 return (ENOMEM);
 930
 931         /*
 932          * Linux is very simplistic about DMA memory.  For now don't
 933          * maintain all specification information.  Once Linux supplies
 934          * better facilities for doing these operations, or the
 935          * needs of this particular driver change, we might need to do
 936          * more here.
 937          */
 938         dmat->alignment = alignment;
 939         dmat->boundary = boundary;
 940         dmat->maxsize = maxsize;
 941         *ret_tag = dmat;
 942         return (0);
 943 }
 944
 945 void
 946 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
 947 {
 948         kfree(dmat);
 949 }
 950
 951 int
 952 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
 953                  int flags, bus_dmamap_t *mapp)
 954 {
 955         *vaddr = dma_alloc_coherent(&ahd->dev_softc->dev, dmat->maxsize, mapp,
 956                                     GFP_ATOMIC);
 957         if (*vaddr == NULL)
 958                 return (ENOMEM);
 959         return(0);
 960 }
 961
 962 void
 963 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
 964                 void* vaddr, bus_dmamap_t map)
 965 {
 966         dma_free_coherent(&ahd->dev_softc->dev, dmat->maxsize, vaddr, map);
 967 }
 968
 969 int
 970 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
 971                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
 972                 void *cb_arg, int flags)
 973 {
 974         /*
 975          * Assume for now that this will only be used during
 976          * initialization and not for per-transaction buffer mapping.
 977          */
 978         bus_dma_segment_t stack_sg;
 979
 980         stack_sg.ds_addr = map;
 981         stack_sg.ds_len = dmat->maxsize;
 982         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
 983         return (0);
 984 }
 985
 986 void
 987 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 988 {
 989 }
 990
 991 int
 992 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
 993 {
 994         /* Nothing to do */
 995         return (0);
 996 }
 997
 998 /********************* Platform Dependent Functions ***************************/
 999 static void
1000 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1001 {
1002
1003         if ((instance >= 0)
1004          && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1005                 uint8_t *iocell_info;
1006
1007                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1008                 iocell_info[index] = value & 0xFFFF;
1009                 if (bootverbose)
1010                         printk("iocell[%d:%ld] = %d\n", instance, index, value);
1011         }
1012 }
1013
1014 static void
1015 ahd_linux_setup_tag_info_global(char *p)
1016 {
1017         int tags, i, j;
1018
1019         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1020         printk("Setting Global Tags= %d\n", tags);
1021
1022         for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1023                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1024                         aic79xx_tag_info[i].tag_commands[j] = tags;
1025                 }
1026         }
1027 }
1028
1029 static void
1030 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1031 {
1032
1033         if ((instance >= 0) && (targ >= 0)
1034          && (instance < ARRAY_SIZE(aic79xx_tag_info))
1035          && (targ < AHD_NUM_TARGETS)) {
1036                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1037                 if (bootverbose)
1038                         printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1039         }
1040 }
1041
1042 static char *
1043 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1044                        void (*callback)(u_long, int, int, int32_t),
1045                        u_long callback_arg)
1046 {
1047         char    *tok_end;
1048         char    *tok_end2;
1049         int      i;
1050         int      instance;
1051         int      targ;
1052         int      done;
1053         char     tok_list[] = {'.', ',', '{', '}', '\0'};
1054
1055         /* All options use a ':' name/arg separator */
1056         if (*opt_arg != ':')
1057                 return (opt_arg);
1058         opt_arg++;
1059         instance = -1;
1060         targ = -1;
1061         done = FALSE;
1062         /*
1063          * Restore separator that may be in
1064          * the middle of our option argument.
1065          */
1066         tok_end = strchr(opt_arg, '\0');
1067         if (tok_end < end)
1068                 *tok_end = ',';
1069         while (!done) {
1070                 switch (*opt_arg) {
1071                 case '{':
1072                         if (instance == -1) {
1073                                 instance = 0;
1074                         } else {
1075                                 if (depth > 1) {
1076                                         if (targ == -1)
1077                                                 targ = 0;
1078                                 } else {
1079                                         printk("Malformed Option %s\n",
1080                                                opt_name);
1081                                         done = TRUE;
1082                                 }
1083                         }
1084                         opt_arg++;
1085                         break;
1086                 case '}':
1087                         if (targ != -1)
1088                                 targ = -1;
1089                         else if (instance != -1)
1090                                 instance = -1;
1091                         opt_arg++;
1092                         break;
1093                 case ',':
1094                 case '.':
1095                         if (instance == -1)
1096                                 done = TRUE;
1097                         else if (targ >= 0)
1098                                 targ++;
1099                         else if (instance >= 0)
1100                                 instance++;
1101                         opt_arg++;
1102                         break;
1103                 case '\0':
1104                         done = TRUE;
1105                         break;
1106                 default:
1107                         tok_end = end;
1108                         for (i = 0; tok_list[i]; i++) {
1109                                 tok_end2 = strchr(opt_arg, tok_list[i]);
1110                                 if ((tok_end2) && (tok_end2 < tok_end))
1111                                         tok_end = tok_end2;
1112                         }
1113                         callback(callback_arg, instance, targ,
1114                                  simple_strtol(opt_arg, NULL, 0));
1115                         opt_arg = tok_end;
1116                         break;
1117                 }
1118         }
1119         return (opt_arg);
1120 }
1121
1122 /*
1123  * Handle Linux boot parameters. This routine allows for assigning a value
1124  * to a parameter with a ':' between the parameter and the value.
1125  * ie. aic79xx=stpwlev:1,extended
1126  */
1127 static int
1128 aic79xx_setup(char *s)
1129 {
1130         int     i, n;
1131         char   *p;
1132         char   *end;
1133
1134         static const struct {
1135                 const char *name;
1136                 uint32_t *flag;
1137         } options[] = {
1138                 { "extended", &aic79xx_extended },
1139                 { "no_reset", &aic79xx_no_reset },
1140                 { "verbose", &aic79xx_verbose },
1141                 { "allow_memio", &aic79xx_allow_memio},
1142 #ifdef AHD_DEBUG
1143                 { "debug", &ahd_debug },
1144 #endif
1145                 { "periodic_otag", &aic79xx_periodic_otag },
1146                 { "pci_parity", &aic79xx_pci_parity },
1147                 { "seltime", &aic79xx_seltime },
1148                 { "tag_info", NULL },
1149                 { "global_tag_depth", NULL},
1150                 { "slewrate", NULL },
1151                 { "precomp", NULL },
1152                 { "amplitude", NULL },
1153                 { "slowcrc", &aic79xx_slowcrc },
1154         };
1155
1156         end = strchr(s, '\0');
1157
1158         /*
1159          * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1160          * will never be 0 in this case.
1161          */
1162         n = 0;
1163
1164         while ((p = strsep(&s, ",.")) != NULL) {
1165                 if (*p == '\0')
1166                         continue;
1167                 for (i = 0; i < ARRAY_SIZE(options); i++) {
1168
1169                         n = strlen(options[i].name);
1170                         if (strncmp(options[i].name, p, n) == 0)
1171                                 break;
1172                 }
1173                 if (i == ARRAY_SIZE(options))
1174                         continue;
1175
1176                 if (strncmp(p, "global_tag_depth", n) == 0) {
1177                         ahd_linux_setup_tag_info_global(p + n);
1178                 } else if (strncmp(p, "tag_info", n) == 0) {
1179                         s = ahd_parse_brace_option("tag_info", p + n, end,
1180                             2, ahd_linux_setup_tag_info, 0);
1181                 } else if (strncmp(p, "slewrate", n) == 0) {
1182                         s = ahd_parse_brace_option("slewrate",
1183                             p + n, end, 1, ahd_linux_setup_iocell_info,
1184                             AIC79XX_SLEWRATE_INDEX);
1185                 } else if (strncmp(p, "precomp", n) == 0) {
1186                         s = ahd_parse_brace_option("precomp",
1187                             p + n, end, 1, ahd_linux_setup_iocell_info,
1188                             AIC79XX_PRECOMP_INDEX);
1189                 } else if (strncmp(p, "amplitude", n) == 0) {
1190                         s = ahd_parse_brace_option("amplitude",
1191                             p + n, end, 1, ahd_linux_setup_iocell_info,
1192                             AIC79XX_AMPLITUDE_INDEX);
1193                 } else if (p[n] == ':') {
1194                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1195                 } else if (!strncmp(p, "verbose", n)) {
1196                         *(options[i].flag) = 1;
1197                 } else {
1198                         *(options[i].flag) ^= 0xFFFFFFFF;
1199                 }
1200         }
1201         return 1;
1202 }
1203
1204 __setup("aic79xx=", aic79xx_setup);
1205
1206 uint32_t aic79xx_verbose;
1207
1208 int
1209 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1210 {
1211         char    buf[80];
1212         struct  Scsi_Host *host;
1213         char    *new_name;
1214         u_long  s;
1215         int     retval;
1216
1217         template->name = ahd->description;
1218         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1219         if (host == NULL)
1220                 return (ENOMEM);
1221
1222         *((struct ahd_softc **)host->hostdata) = ahd;
1223         ahd->platform_data->host = host;
1224         host->can_queue = AHD_MAX_QUEUE;
1225         host->cmd_per_lun = 2;
1226         host->sg_tablesize = AHD_NSEG;
1227         host->this_id = ahd->our_id;
1228         host->irq = ahd->platform_data->irq;
1229         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1230         host->max_lun = AHD_NUM_LUNS;
1231         host->max_channel = 0;
1232         host->sg_tablesize = AHD_NSEG;
1233         ahd_lock(ahd, &s);
1234         ahd_set_unit(ahd, ahd_linux_unit++);
1235         ahd_unlock(ahd, &s);
1236         sprintf(buf, "scsi%d", host->host_no);
1237         new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1238         if (new_name != NULL) {
1239                 strcpy(new_name, buf);
1240                 ahd_set_name(ahd, new_name);
1241         }
1242         host->unique_id = ahd->unit;
1243         ahd_linux_initialize_scsi_bus(ahd);
1244         ahd_intr_enable(ahd, TRUE);
1245
1246         host->transportt = ahd_linux_transport_template;
1247
1248         retval = scsi_add_host(host, &ahd->dev_softc->dev);
1249         if (retval) {
1250                 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1251                 scsi_host_put(host);
1252                 return retval;
1253         }
1254
1255         scsi_scan_host(host);
1256         return 0;
1257 }
1258
1259 /*
1260  * Place the SCSI bus into a known state by either resetting it,
1261  * or forcing transfer negotiations on the next command to any
1262  * target.
1263  */
1264 static void
1265 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1266 {
1267         u_int target_id;
1268         u_int numtarg;
1269         unsigned long s;
1270
1271         target_id = 0;
1272         numtarg = 0;
1273
1274         if (aic79xx_no_reset != 0)
1275                 ahd->flags &= ~AHD_RESET_BUS_A;
1276
1277         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1278                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1279         else
1280                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1281
1282         ahd_lock(ahd, &s);
1283
1284         /*
1285          * Force negotiation to async for all targets that
1286          * will not see an initial bus reset.
1287          */
1288         for (; target_id < numtarg; target_id++) {
1289                 struct ahd_devinfo devinfo;
1290                 struct ahd_initiator_tinfo *tinfo;
1291                 struct ahd_tmode_tstate *tstate;
1292
1293                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1294                                             target_id, &tstate);
1295                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1296                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1297                 ahd_update_neg_request(ahd, &devinfo, tstate,
1298                                        tinfo, AHD_NEG_ALWAYS);
1299         }
1300         ahd_unlock(ahd, &s);
1301         /* Give the bus some time to recover */
1302         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1303                 ahd_freeze_simq(ahd);
1304                 msleep(AIC79XX_RESET_DELAY);
1305                 ahd_release_simq(ahd);
1306         }
1307 }
1308
1309 int
1310 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1311 {
1312         ahd->platform_data =
1313             kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
1314         if (ahd->platform_data == NULL)
1315                 return (ENOMEM);
1316         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1317         ahd_lockinit(ahd);
1318         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1319         return (0);
1320 }
1321
1322 void
1323 ahd_platform_free(struct ahd_softc *ahd)
1324 {
1325         struct scsi_target *starget;
1326         int i;
1327
1328         if (ahd->platform_data != NULL) {
1329                 /* destroy all of the device and target objects */
1330                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1331                         starget = ahd->platform_data->starget[i];
1332                         if (starget != NULL) {
1333                                 ahd->platform_data->starget[i] = NULL;
1334                         }
1335                 }
1336
1337                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1338                         free_irq(ahd->platform_data->irq, ahd);
1339                 if (ahd->tags[0] == BUS_SPACE_PIO
1340                  && ahd->bshs[0].ioport != 0)
1341                         release_region(ahd->bshs[0].ioport, 256);
1342                 if (ahd->tags[1] == BUS_SPACE_PIO
1343                  && ahd->bshs[1].ioport != 0)
1344                         release_region(ahd->bshs[1].ioport, 256);
1345                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1346                  && ahd->bshs[0].maddr != NULL) {
1347                         iounmap(ahd->bshs[0].maddr);
1348                         release_mem_region(ahd->platform_data->mem_busaddr,
1349                                            0x1000);
1350                 }
1351                 if (ahd->platform_data->host)
1352                         scsi_host_put(ahd->platform_data->host);
1353
1354                 kfree(ahd->platform_data);
1355         }
1356 }
1357
1358 void
1359 ahd_platform_init(struct ahd_softc *ahd)
1360 {
1361         /*
1362          * Lookup and commit any modified IO Cell options.
1363          */
1364         if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1365                 const struct ahd_linux_iocell_opts *iocell_opts;
1366
1367                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1368                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1369                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1370                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1371                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1372                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1373                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1374         }
1375
1376 }
1377
1378 void
1379 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1380 {
1381         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1382                                 SCB_GET_CHANNEL(ahd, scb),
1383                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1384                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1385 }
1386
1387 void
1388 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1389                       struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1390 {
1391         struct ahd_linux_device *dev;
1392         int was_queuing;
1393         int now_queuing;
1394
1395         if (sdev == NULL)
1396                 return;
1397
1398         dev = scsi_transport_device_data(sdev);
1399
1400         if (dev == NULL)
1401                 return;
1402         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1403         switch (alg) {
1404         default:
1405         case AHD_QUEUE_NONE:
1406                 now_queuing = 0;
1407                 break;
1408         case AHD_QUEUE_BASIC:
1409                 now_queuing = AHD_DEV_Q_BASIC;
1410                 break;
1411         case AHD_QUEUE_TAGGED:
1412                 now_queuing = AHD_DEV_Q_TAGGED;
1413                 break;
1414         }
1415         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1416          && (was_queuing != now_queuing)
1417          && (dev->active != 0)) {
1418                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1419                 dev->qfrozen++;
1420         }
1421
1422         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1423         if (now_queuing) {
1424                 u_int usertags;
1425
1426                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1427                 if (!was_queuing) {
1428                         /*
1429                          * Start out aggressively and allow our
1430                          * dynamic queue depth algorithm to take
1431                          * care of the rest.
1432                          */
1433                         dev->maxtags = usertags;
1434                         dev->openings = dev->maxtags - dev->active;
1435                 }
1436                 if (dev->maxtags == 0) {
1437                         /*
1438                          * Queueing is disabled by the user.
1439                          */
1440                         dev->openings = 1;
1441                 } else if (alg == AHD_QUEUE_TAGGED) {
1442                         dev->flags |= AHD_DEV_Q_TAGGED;
1443                         if (aic79xx_periodic_otag != 0)
1444                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1445                 } else
1446                         dev->flags |= AHD_DEV_Q_BASIC;
1447         } else {
1448                 /* We can only have one opening. */
1449                 dev->maxtags = 0;
1450                 dev->openings =  1 - dev->active;
1451         }
1452
1453         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1454         case AHD_DEV_Q_BASIC:
1455         case AHD_DEV_Q_TAGGED:
1456                 scsi_change_queue_depth(sdev,
1457                                 dev->openings + dev->active);
1458                 break;
1459         default:
1460                 /*
1461                  * We allow the OS to queue 2 untagged transactions to
1462                  * us at any time even though we can only execute them
1463                  * serially on the controller/device.  This should
1464                  * remove some latency.
1465                  */
1466                 scsi_change_queue_depth(sdev, 1);
1467                 break;
1468         }
1469 }
1470
1471 int
1472 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1473                         int lun, u_int tag, role_t role, uint32_t status)
1474 {
1475         return 0;
1476 }
1477
1478 static u_int
1479 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1480 {
1481         static int warned_user;
1482         u_int tags;
1483
1484         tags = 0;
1485         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1486                 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1487
1488                         if (warned_user == 0) {
1489                                 printk(KERN_WARNING
1490 "aic79xx: WARNING: Insufficient tag_info instances\n"
1491 "aic79xx: for installed controllers.  Using defaults\n"
1492 "aic79xx: Please update the aic79xx_tag_info array in\n"
1493 "aic79xx: the aic79xx_osm.c source file.\n");
1494                                 warned_user++;
1495                         }
1496                         tags = AHD_MAX_QUEUE;
1497                 } else {
1498                         adapter_tag_info_t *tag_info;
1499
1500                         tag_info = &aic79xx_tag_info[ahd->unit];
1501                         tags = tag_info->tag_commands[devinfo->target_offset];
1502                         if (tags > AHD_MAX_QUEUE)
1503                                 tags = AHD_MAX_QUEUE;
1504                 }
1505         }
1506         return (tags);
1507 }
1508
1509 /*
1510  * Determines the queue depth for a given device.
1511  */
1512 static void
1513 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1514 {
1515         struct  ahd_devinfo devinfo;
1516         u_int   tags;
1517         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1518
1519         ahd_compile_devinfo(&devinfo,
1520                             ahd->our_id,
1521                             sdev->sdev_target->id, sdev->lun,
1522                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1523                             ROLE_INITIATOR);
1524         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1525         if (tags != 0 && sdev->tagged_supported != 0) {
1526
1527                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1528                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1529                                devinfo.lun, AC_TRANSFER_NEG);
1530                 ahd_print_devinfo(ahd, &devinfo);
1531                 printk("Tagged Queuing enabled.  Depth %d\n", tags);
1532         } else {
1533                 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1534                 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1535                                devinfo.lun, AC_TRANSFER_NEG);
1536         }
1537 }
1538
1539 static int
1540 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1541                       struct scsi_cmnd *cmd)
1542 {
1543         struct   scb *scb;
1544         struct   hardware_scb *hscb;
1545         struct   ahd_initiator_tinfo *tinfo;
1546         struct   ahd_tmode_tstate *tstate;
1547         u_int    col_idx;
1548         uint16_t mask;
1549         unsigned long flags;
1550         int nseg;
1551
1552         nseg = scsi_dma_map(cmd);
1553         if (nseg < 0)
1554                 return SCSI_MLQUEUE_HOST_BUSY;
1555
1556         ahd_lock(ahd, &flags);
1557
1558         /*
1559          * Get an scb to use.
1560          */
1561         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1562                                     cmd->device->id, &tstate);
1563         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1564          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1565                 col_idx = AHD_NEVER_COL_IDX;
1566         } else {
1567                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1568                                             cmd->device->lun);
1569         }
1570         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1571                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1572                 ahd_unlock(ahd, &flags);
1573                 scsi_dma_unmap(cmd);
1574                 return SCSI_MLQUEUE_HOST_BUSY;
1575         }
1576
1577         scb->io_ctx = cmd;
1578         scb->platform_data->dev = dev;
1579         hscb = scb->hscb;
1580         cmd->host_scribble = (char *)scb;
1581
1582         /*
1583          * Fill out basics of the HSCB.
1584          */
1585         hscb->control = 0;
1586         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1587         hscb->lun = cmd->device->lun;
1588         scb->hscb->task_management = 0;
1589         mask = SCB_GET_TARGET_MASK(ahd, scb);
1590
1591         if ((ahd->user_discenable & mask) != 0)
1592                 hscb->control |= DISCENB;
1593
1594         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1595                 scb->flags |= SCB_PACKETIZED;
1596
1597         if ((tstate->auto_negotiate & mask) != 0) {
1598                 scb->flags |= SCB_AUTO_NEGOTIATE;
1599                 scb->hscb->control |= MK_MESSAGE;
1600         }
1601
1602         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1603                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1604                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1605                         hscb->control |= ORDERED_QUEUE_TAG;
1606                         dev->commands_since_idle_or_otag = 0;
1607                 } else {
1608                         hscb->control |= SIMPLE_QUEUE_TAG;
1609                 }
1610         }
1611
1612         hscb->cdb_len = cmd->cmd_len;
1613         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1614
1615         scb->platform_data->xfer_len = 0;
1616         ahd_set_residual(scb, 0);
1617         ahd_set_sense_residual(scb, 0);
1618         scb->sg_count = 0;
1619
1620         if (nseg > 0) {
1621                 void *sg = scb->sg_list;
1622                 struct scatterlist *cur_seg;
1623                 int i;
1624
1625                 scb->platform_data->xfer_len = 0;
1626
1627                 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1628                         dma_addr_t addr;
1629                         bus_size_t len;
1630
1631                         addr = sg_dma_address(cur_seg);
1632                         len = sg_dma_len(cur_seg);
1633                         scb->platform_data->xfer_len += len;
1634                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1635                                           i == (nseg - 1));
1636                 }
1637         }
1638
1639         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1640         dev->openings--;
1641         dev->active++;
1642         dev->commands_issued++;
1643
1644         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1645                 dev->commands_since_idle_or_otag++;
1646         scb->flags |= SCB_ACTIVE;
1647         ahd_queue_scb(ahd, scb);
1648
1649         ahd_unlock(ahd, &flags);
1650
1651         return 0;
1652 }
1653
1654 /*
1655  * SCSI controller interrupt handler.
1656  */
1657 irqreturn_t
1658 ahd_linux_isr(int irq, void *dev_id)
1659 {
1660         struct  ahd_softc *ahd;
1661         u_long  flags;
1662         int     ours;
1663
1664         ahd = (struct ahd_softc *) dev_id;
1665         ahd_lock(ahd, &flags);
1666         ours = ahd_intr(ahd);
1667         ahd_unlock(ahd, &flags);
1668         return IRQ_RETVAL(ours);
1669 }
1670
1671 void
1672 ahd_send_async(struct ahd_softc *ahd, char channel,
1673                u_int target, u_int lun, ac_code code)
1674 {
1675         switch (code) {
1676         case AC_TRANSFER_NEG:
1677         {
1678                 struct  scsi_target *starget;
1679                 struct  ahd_initiator_tinfo *tinfo;
1680                 struct  ahd_tmode_tstate *tstate;
1681                 unsigned int target_ppr_options;
1682
1683                 BUG_ON(target == CAM_TARGET_WILDCARD);
1684
1685                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1686                                             target, &tstate);
1687
1688                 /*
1689                  * Don't bother reporting results while
1690                  * negotiations are still pending.
1691                  */
1692                 if (tinfo->curr.period != tinfo->goal.period
1693                  || tinfo->curr.width != tinfo->goal.width
1694                  || tinfo->curr.offset != tinfo->goal.offset
1695                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1696                         if (bootverbose == 0)
1697                                 break;
1698
1699                 /*
1700                  * Don't bother reporting results that
1701                  * are identical to those last reported.
1702                  */
1703                 starget = ahd->platform_data->starget[target];
1704                 if (starget == NULL)
1705                         break;
1706
1707                 target_ppr_options =
1708                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1709                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1710                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1711                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1712                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1713                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1714                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1715                         + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1716
1717                 if (tinfo->curr.period == spi_period(starget)
1718                     && tinfo->curr.width == spi_width(starget)
1719                     && tinfo->curr.offset == spi_offset(starget)
1720                  && tinfo->curr.ppr_options == target_ppr_options)
1721                         if (bootverbose == 0)
1722                                 break;
1723
1724                 spi_period(starget) = tinfo->curr.period;
1725                 spi_width(starget) = tinfo->curr.width;
1726                 spi_offset(starget) = tinfo->curr.offset;
1727                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1728                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1729                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1730                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1731                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1732                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1733                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1734                 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1735                 spi_display_xfer_agreement(starget);
1736                 break;
1737         }
1738         case AC_SENT_BDR:
1739         {
1740                 WARN_ON(lun != CAM_LUN_WILDCARD);
1741                 scsi_report_device_reset(ahd->platform_data->host,
1742                                          channel - 'A', target);
1743                 break;
1744         }
1745         case AC_BUS_RESET:
1746                 if (ahd->platform_data->host != NULL) {
1747                         scsi_report_bus_reset(ahd->platform_data->host,
1748                                               channel - 'A');
1749                 }
1750                 break;
1751         default:
1752                 panic("ahd_send_async: Unexpected async event");
1753         }
1754 }
1755
1756 /*
1757  * Calls the higher level scsi done function and frees the scb.
1758  */
1759 void
1760 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1761 {
1762         struct scsi_cmnd *cmd;
1763         struct    ahd_linux_device *dev;
1764
1765         if ((scb->flags & SCB_ACTIVE) == 0) {
1766                 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1767                 ahd_dump_card_state(ahd);
1768                 panic("Stopping for safety");
1769         }
1770         LIST_REMOVE(scb, pending_links);
1771         cmd = scb->io_ctx;
1772         dev = scb->platform_data->dev;
1773         dev->active--;
1774         dev->openings++;
1775         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1776                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1777                 dev->qfrozen--;
1778         }
1779         ahd_linux_unmap_scb(ahd, scb);
1780
1781         /*
1782          * Guard against stale sense data.
1783          * The Linux mid-layer assumes that sense
1784          * was retrieved anytime the first byte of
1785          * the sense buffer looks "sane".
1786          */
1787         cmd->sense_buffer[0] = 0;
1788         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1789 #ifdef AHD_REPORT_UNDERFLOWS
1790                 uint32_t amount_xferred;
1791
1792                 amount_xferred =
1793                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1794 #endif
1795                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1796 #ifdef AHD_DEBUG
1797                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1798                                 ahd_print_path(ahd, scb);
1799                                 printk("Set CAM_UNCOR_PARITY\n");
1800                         }
1801 #endif
1802                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1803 #ifdef AHD_REPORT_UNDERFLOWS
1804                 /*
1805                  * This code is disabled by default as some
1806                  * clients of the SCSI system do not properly
1807                  * initialize the underflow parameter.  This
1808                  * results in spurious termination of commands
1809                  * that complete as expected (e.g. underflow is
1810                  * allowed as command can return variable amounts
1811                  * of data.
1812                  */
1813                 } else if (amount_xferred < scb->io_ctx->underflow) {
1814                         u_int i;
1815
1816                         ahd_print_path(ahd, scb);
1817                         printk("CDB:");
1818                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1819                                 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1820                         printk("\n");
1821                         ahd_print_path(ahd, scb);
1822                         printk("Saw underflow (%ld of %ld bytes). "
1823                                "Treated as error\n",
1824                                 ahd_get_residual(scb),
1825                                 ahd_get_transfer_length(scb));
1826                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1827 #endif
1828                 } else {
1829                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1830                 }
1831         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1832                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1833         }
1834
1835         if (dev->openings == 1
1836          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1837          && ahd_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL)
1838                 dev->tag_success_count++;
1839         /*
1840          * Some devices deal with temporary internal resource
1841          * shortages by returning queue full.  When the queue
1842          * full occurrs, we throttle back.  Slowly try to get
1843          * back to our previous queue depth.
1844          */
1845         if ((dev->openings + dev->active) < dev->maxtags
1846          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1847                 dev->tag_success_count = 0;
1848                 dev->openings++;
1849         }
1850
1851         if (dev->active == 0)
1852                 dev->commands_since_idle_or_otag = 0;
1853
1854         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1855                 printk("Recovery SCB completes\n");
1856                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1857                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1858                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1859
1860                 if (ahd->platform_data->eh_done)
1861                         complete(ahd->platform_data->eh_done);
1862         }
1863
1864         ahd_free_scb(ahd, scb);
1865         ahd_linux_queue_cmd_complete(ahd, cmd);
1866 }
1867
1868 static void
1869 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1870                              struct scsi_device *sdev, struct scb *scb)
1871 {
1872         struct  ahd_devinfo devinfo;
1873         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1874
1875         ahd_compile_devinfo(&devinfo,
1876                             ahd->our_id,
1877                             sdev->sdev_target->id, sdev->lun,
1878                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1879                             ROLE_INITIATOR);
1880
1881         /*
1882          * We don't currently trust the mid-layer to
1883          * properly deal with queue full or busy.  So,
1884          * when one occurs, we tell the mid-layer to
1885          * unconditionally requeue the command to us
1886          * so that we can retry it ourselves.  We also
1887          * implement our own throttling mechanism so
1888          * we don't clobber the device with too many
1889          * commands.
1890          */
1891         switch (ahd_get_scsi_status(scb)) {
1892         default:
1893                 break;
1894         case SAM_STAT_CHECK_CONDITION:
1895         case SAM_STAT_COMMAND_TERMINATED:
1896         {
1897                 struct scsi_cmnd *cmd;
1898
1899                 /*
1900                  * Copy sense information to the OS's cmd
1901                  * structure if it is available.
1902                  */
1903                 cmd = scb->io_ctx;
1904                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1905                         struct scsi_status_iu_header *siu;
1906                         u_int sense_size;
1907                         u_int sense_offset;
1908
1909                         if (scb->flags & SCB_SENSE) {
1910                                 sense_size = min(sizeof(struct scsi_sense_data)
1911                                                - ahd_get_sense_residual(scb),
1912                                                  (u_long)SCSI_SENSE_BUFFERSIZE);
1913                                 sense_offset = 0;
1914                         } else {
1915                                 /*
1916                                  * Copy only the sense data into the provided
1917                                  * buffer.
1918                                  */
1919                                 siu = (struct scsi_status_iu_header *)
1920                                     scb->sense_data;
1921                                 sense_size = min_t(size_t,
1922                                                 scsi_4btoul(siu->sense_length),
1923                                                 SCSI_SENSE_BUFFERSIZE);
1924                                 sense_offset = SIU_SENSE_OFFSET(siu);
1925                         }
1926
1927                         memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1928                         memcpy(cmd->sense_buffer,
1929                                ahd_get_sense_buf(ahd, scb)
1930                                + sense_offset, sense_size);
1931                         cmd->result |= (DRIVER_SENSE << 24);
1932
1933 #ifdef AHD_DEBUG
1934                         if (ahd_debug & AHD_SHOW_SENSE) {
1935                                 int i;
1936
1937                                 printk("Copied %d bytes of sense data at %d:",
1938                                        sense_size, sense_offset);
1939                                 for (i = 0; i < sense_size; i++) {
1940                                         if ((i & 0xF) == 0)
1941                                                 printk("\n");
1942                                         printk("0x%x ", cmd->sense_buffer[i]);
1943                                 }
1944                                 printk("\n");
1945                         }
1946 #endif
1947                 }
1948                 break;
1949         }
1950         case SAM_STAT_TASK_SET_FULL:
1951                 /*
1952                  * By the time the core driver has returned this
1953                  * command, all other commands that were queued
1954                  * to us but not the device have been returned.
1955                  * This ensures that dev->active is equal to
1956                  * the number of commands actually queued to
1957                  * the device.
1958                  */
1959                 dev->tag_success_count = 0;
1960                 if (dev->active != 0) {
1961                         /*
1962                          * Drop our opening count to the number
1963                          * of commands currently outstanding.
1964                          */
1965                         dev->openings = 0;
1966 #ifdef AHD_DEBUG
1967                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1968                                 ahd_print_path(ahd, scb);
1969                                 printk("Dropping tag count to %d\n",
1970                                        dev->active);
1971                         }
1972 #endif
1973                         if (dev->active == dev->tags_on_last_queuefull) {
1974
1975                                 dev->last_queuefull_same_count++;
1976                                 /*
1977                                  * If we repeatedly see a queue full
1978                                  * at the same queue depth, this
1979                                  * device has a fixed number of tag
1980                                  * slots.  Lock in this tag depth
1981                                  * so we stop seeing queue fulls from
1982                                  * this device.
1983                                  */
1984                                 if (dev->last_queuefull_same_count
1985                                  == AHD_LOCK_TAGS_COUNT) {
1986                                         dev->maxtags = dev->active;
1987                                         ahd_print_path(ahd, scb);
1988                                         printk("Locking max tag count at %d\n",
1989                                                dev->active);
1990                                 }
1991                         } else {
1992                                 dev->tags_on_last_queuefull = dev->active;
1993                                 dev->last_queuefull_same_count = 0;
1994                         }
1995                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1996                         ahd_set_scsi_status(scb, SAM_STAT_GOOD);
1997                         ahd_platform_set_tags(ahd, sdev, &devinfo,
1998                                      (dev->flags & AHD_DEV_Q_BASIC)
1999                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2000                         break;
2001                 }
2002                 /*
2003                  * Drop down to a single opening, and treat this
2004                  * as if the target returned BUSY SCSI status.
2005                  */
2006                 dev->openings = 1;
2007                 ahd_platform_set_tags(ahd, sdev, &devinfo,
2008                              (dev->flags & AHD_DEV_Q_BASIC)
2009                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2010                 ahd_set_scsi_status(scb, SAM_STAT_BUSY);
2011         }
2012 }
2013
2014 static void
2015 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2016 {
2017         int status;
2018         int new_status = DID_OK;
2019         int do_fallback = 0;
2020         int scsi_status;
2021
2022         /*
2023          * Map CAM error codes into Linux Error codes.  We
2024          * avoid the conversion so that the DV code has the
2025          * full error information available when making
2026          * state change decisions.
2027          */
2028
2029         status = ahd_cmd_get_transaction_status(cmd);
2030         switch (status) {
2031         case CAM_REQ_INPROG:
2032         case CAM_REQ_CMP:
2033                 new_status = DID_OK;
2034                 break;
2035         case CAM_AUTOSENSE_FAIL:
2036                 new_status = DID_ERROR;
2037                 fallthrough;
2038         case CAM_SCSI_STATUS_ERROR:
2039                 scsi_status = ahd_cmd_get_scsi_status(cmd);
2040
2041                 switch(scsi_status) {
2042                 case SAM_STAT_COMMAND_TERMINATED:
2043                 case SAM_STAT_CHECK_CONDITION:
2044                         if ((cmd->result >> 24) != DRIVER_SENSE) {
2045                                 do_fallback = 1;
2046                         } else {
2047                                 struct scsi_sense_data *sense;
2048
2049                                 sense = (struct scsi_sense_data *)
2050                                         cmd->sense_buffer;
2051                                 if (sense->extra_len >= 5 &&
2052                                     (sense->add_sense_code == 0x47
2053                                      || sense->add_sense_code == 0x48))
2054                                         do_fallback = 1;
2055                         }
2056                         break;
2057                 default:
2058                         break;
2059                 }
2060                 break;
2061         case CAM_REQ_ABORTED:
2062                 new_status = DID_ABORT;
2063                 break;
2064         case CAM_BUSY:
2065                 new_status = DID_BUS_BUSY;
2066                 break;
2067         case CAM_REQ_INVALID:
2068         case CAM_PATH_INVALID:
2069                 new_status = DID_BAD_TARGET;
2070                 break;
2071         case CAM_SEL_TIMEOUT:
2072                 new_status = DID_NO_CONNECT;
2073                 break;
2074         case CAM_SCSI_BUS_RESET:
2075         case CAM_BDR_SENT:
2076                 new_status = DID_RESET;
2077                 break;
2078         case CAM_UNCOR_PARITY:
2079                 new_status = DID_PARITY;
2080                 do_fallback = 1;
2081                 break;
2082         case CAM_CMD_TIMEOUT:
2083                 new_status = DID_TIME_OUT;
2084                 do_fallback = 1;
2085                 break;
2086         case CAM_REQ_CMP_ERR:
2087         case CAM_UNEXP_BUSFREE:
2088         case CAM_DATA_RUN_ERR:
2089                 new_status = DID_ERROR;
2090                 do_fallback = 1;
2091                 break;
2092         case CAM_UA_ABORT:
2093         case CAM_NO_HBA:
2094         case CAM_SEQUENCE_FAIL:
2095         case CAM_CCB_LEN_ERR:
2096         case CAM_PROVIDE_FAIL:
2097         case CAM_REQ_TERMIO:
2098         case CAM_UNREC_HBA_ERROR:
2099         case CAM_REQ_TOO_BIG:
2100                 new_status = DID_ERROR;
2101                 break;
2102         case CAM_REQUEUE_REQ:
2103                 new_status = DID_REQUEUE;
2104                 break;
2105         default:
2106                 /* We should never get here */
2107                 new_status = DID_ERROR;
2108                 break;
2109         }
2110
2111         if (do_fallback) {
2112                 printk("%s: device overrun (status %x) on %d:%d:%d\n",
2113                        ahd_name(ahd), status, cmd->device->channel,
2114                        cmd->device->id, (u8)cmd->device->lun);
2115         }
2116
2117         ahd_cmd_set_transaction_status(cmd, new_status);
2118
2119         cmd->scsi_done(cmd);
2120 }
2121
2122 static void
2123 ahd_freeze_simq(struct ahd_softc *ahd)
2124 {
2125         scsi_block_requests(ahd->platform_data->host);
2126 }
2127
2128 static void
2129 ahd_release_simq(struct ahd_softc *ahd)
2130 {
2131         scsi_unblock_requests(ahd->platform_data->host);
2132 }
2133
2134 static int
2135 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2136 {
2137         struct ahd_softc *ahd;
2138         struct ahd_linux_device *dev;
2139         struct scb *pending_scb;
2140         u_int  saved_scbptr;
2141         u_int  active_scbptr;
2142         u_int  last_phase;
2143         u_int  cdb_byte;
2144         int    retval = SUCCESS;
2145         int    was_paused;
2146         int    paused;
2147         int    wait;
2148         int    disconnected;
2149         ahd_mode_state saved_modes;
2150         unsigned long flags;
2151
2152         pending_scb = NULL;
2153         paused = FALSE;
2154         wait = FALSE;
2155         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2156
2157         scmd_printk(KERN_INFO, cmd,
2158                     "Attempting to queue an ABORT message:");
2159
2160         printk("CDB:");
2161         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2162                 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2163         printk("\n");
2164
2165         ahd_lock(ahd, &flags);
2166
2167         /*
2168          * First determine if we currently own this command.
2169          * Start by searching the device queue.  If not found
2170          * there, check the pending_scb list.  If not found
2171          * at all, and the system wanted us to just abort the
2172          * command, return success.
2173          */
2174         dev = scsi_transport_device_data(cmd->device);
2175
2176         if (dev == NULL) {
2177                 /*
2178                  * No target device for this command exists,
2179                  * so we must not still own the command.
2180                  */
2181                 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2182                 goto done;
2183         }
2184
2185         /*
2186          * See if we can find a matching cmd in the pending list.
2187          */
2188         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2189                 if (pending_scb->io_ctx == cmd)
2190                         break;
2191         }
2192
2193         if (pending_scb == NULL) {
2194                 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2195                 goto done;
2196         }
2197
2198         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2199                 /*
2200                  * We can't queue two recovery actions using the same SCB
2201                  */
2202                 retval = FAILED;
2203                 goto done;
2204         }
2205
2206         /*
2207          * Ensure that the card doesn't do anything
2208          * behind our back.  Also make sure that we
2209          * didn't "just" miss an interrupt that would
2210          * affect this cmd.
2211          */
2212         was_paused = ahd_is_paused(ahd);
2213         ahd_pause_and_flushwork(ahd);
2214         paused = TRUE;
2215
2216         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2217                 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2218                 goto done;
2219         }
2220
2221         printk("%s: At time of recovery, card was %spaused\n",
2222                ahd_name(ahd), was_paused ? "" : "not ");
2223         ahd_dump_card_state(ahd);
2224
2225         disconnected = TRUE;
2226         if (ahd_search_qinfifo(ahd, cmd->device->id,
2227                                cmd->device->channel + 'A',
2228                                cmd->device->lun,
2229                                pending_scb->hscb->tag,
2230                                ROLE_INITIATOR, CAM_REQ_ABORTED,
2231                                SEARCH_COMPLETE) > 0) {
2232                 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2233                        ahd_name(ahd), cmd->device->channel,
2234                        cmd->device->id, (u8)cmd->device->lun);
2235                 goto done;
2236         }
2237
2238         saved_modes = ahd_save_modes(ahd);
2239         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2240         last_phase = ahd_inb(ahd, LASTPHASE);
2241         saved_scbptr = ahd_get_scbptr(ahd);
2242         active_scbptr = saved_scbptr;
2243         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2244                 struct scb *bus_scb;
2245
2246                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2247                 if (bus_scb == pending_scb)
2248                         disconnected = FALSE;
2249         }
2250
2251         /*
2252          * At this point, pending_scb is the scb associated with the
2253          * passed in command.  That command is currently active on the
2254          * bus or is in the disconnected state.
2255          */
2256         ahd_inb(ahd, SAVED_SCSIID);
2257         if (last_phase != P_BUSFREE
2258             && SCB_GET_TAG(pending_scb) == active_scbptr) {
2259
2260                 /*
2261                  * We're active on the bus, so assert ATN
2262                  * and hope that the target responds.
2263                  */
2264                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2265                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2266                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2267                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2268                 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2269                 wait = TRUE;
2270         } else if (disconnected) {
2271
2272                 /*
2273                  * Actually re-queue this SCB in an attempt
2274                  * to select the device before it reconnects.
2275                  */
2276                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2277                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2278                 pending_scb->hscb->cdb_len = 0;
2279                 pending_scb->hscb->task_attribute = 0;
2280                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2281
2282                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2283                         /*
2284                          * Mark the SCB has having an outstanding
2285                          * task management function.  Should the command
2286                          * complete normally before the task management
2287                          * function can be sent, the host will be notified
2288                          * to abort our requeued SCB.
2289                          */
2290                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2291                                  pending_scb->hscb->task_management);
2292                 } else {
2293                         /*
2294                          * If non-packetized, set the MK_MESSAGE control
2295                          * bit indicating that we desire to send a message.
2296                          * We also set the disconnected flag since there is
2297                          * no guarantee that our SCB control byte matches
2298                          * the version on the card.  We don't want the
2299                          * sequencer to abort the command thinking an
2300                          * unsolicited reselection occurred.
2301                          */
2302                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2303
2304                         /*
2305                          * The sequencer will never re-reference the
2306                          * in-core SCB.  To make sure we are notified
2307                          * during reselection, set the MK_MESSAGE flag in
2308                          * the card's copy of the SCB.
2309                          */
2310                         ahd_outb(ahd, SCB_CONTROL,
2311                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2312                 }
2313
2314                 /*
2315                  * Clear out any entries in the QINFIFO first
2316                  * so we are the next SCB for this target
2317                  * to run.
2318                  */
2319                 ahd_search_qinfifo(ahd, cmd->device->id,
2320                                    cmd->device->channel + 'A', cmd->device->lun,
2321                                    SCB_LIST_NULL, ROLE_INITIATOR,
2322                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2323                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2324                 ahd_set_scbptr(ahd, saved_scbptr);
2325                 ahd_print_path(ahd, pending_scb);
2326                 printk("Device is disconnected, re-queuing SCB\n");
2327                 wait = TRUE;
2328         } else {
2329                 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2330                 retval = FAILED;
2331         }
2332
2333
2334         ahd_restore_modes(ahd, saved_modes);
2335 done:
2336         if (paused)
2337                 ahd_unpause(ahd);
2338         if (wait) {
2339                 DECLARE_COMPLETION_ONSTACK(done);
2340
2341                 ahd->platform_data->eh_done = &done;
2342                 ahd_unlock(ahd, &flags);
2343
2344                 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
2345                 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2346                         ahd_lock(ahd, &flags);
2347                         ahd->platform_data->eh_done = NULL;
2348                         ahd_unlock(ahd, &flags);
2349                         printk("%s: Timer Expired (active %d)\n",
2350                                ahd_name(ahd), dev->active);
2351                         retval = FAILED;
2352                 }
2353                 printk("Recovery code awake\n");
2354         } else
2355                 ahd_unlock(ahd, &flags);
2356
2357         if (retval != SUCCESS)
2358                 printk("%s: Command abort returning 0x%x\n",
2359                        ahd_name(ahd), retval);
2360
2361         return retval;
2362 }
2363
2364 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2365 {
2366         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2367         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2368         struct ahd_devinfo devinfo;
2369         unsigned long flags;
2370
2371         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2372                             starget->channel + 'A', ROLE_INITIATOR);
2373         ahd_lock(ahd, &flags);
2374         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2375         ahd_unlock(ahd, &flags);
2376 }
2377
2378 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2379 {
2380         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2381         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2382         struct ahd_tmode_tstate *tstate;
2383         struct ahd_initiator_tinfo *tinfo
2384                 = ahd_fetch_transinfo(ahd,
2385                                       starget->channel + 'A',
2386                                       shost->this_id, starget->id, &tstate);
2387         struct ahd_devinfo devinfo;
2388         unsigned int ppr_options = tinfo->goal.ppr_options;
2389         unsigned int dt;
2390         unsigned long flags;
2391         unsigned long offset = tinfo->goal.offset;
2392
2393 #ifdef AHD_DEBUG
2394         if ((ahd_debug & AHD_SHOW_DV) != 0)
2395                 printk("%s: set period to %d\n", ahd_name(ahd), period);
2396 #endif
2397         if (offset == 0)
2398                 offset = MAX_OFFSET;
2399
2400         if (period < 8)
2401                 period = 8;
2402         if (period < 10) {
2403                 if (spi_max_width(starget)) {
2404                         ppr_options |= MSG_EXT_PPR_DT_REQ;
2405                         if (period == 8)
2406                                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2407                 } else
2408                         period = 10;
2409         }
2410
2411         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2412
2413         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2414                             starget->channel + 'A', ROLE_INITIATOR);
2415
2416         /* all PPR requests apart from QAS require wide transfers */
2417         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2418                 if (spi_width(starget) == 0)
2419                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2420         }
2421
2422         ahd_find_syncrate(ahd, &period, &ppr_options,
2423                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2424
2425         ahd_lock(ahd, &flags);
2426         ahd_set_syncrate(ahd, &devinfo, period, offset,
2427                          ppr_options, AHD_TRANS_GOAL, FALSE);
2428         ahd_unlock(ahd, &flags);
2429 }
2430
2431 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2432 {
2433         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2434         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2435         struct ahd_tmode_tstate *tstate;
2436         struct ahd_initiator_tinfo *tinfo
2437                 = ahd_fetch_transinfo(ahd,
2438                                       starget->channel + 'A',
2439                                       shost->this_id, starget->id, &tstate);
2440         struct ahd_devinfo devinfo;
2441         unsigned int ppr_options = 0;
2442         unsigned int period = 0;
2443         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2444         unsigned long flags;
2445
2446 #ifdef AHD_DEBUG
2447         if ((ahd_debug & AHD_SHOW_DV) != 0)
2448                 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
2449 #endif
2450
2451         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2452                             starget->channel + 'A', ROLE_INITIATOR);
2453         if (offset != 0) {
2454                 period = tinfo->goal.period;
2455                 ppr_options = tinfo->goal.ppr_options;
2456                 ahd_find_syncrate(ahd, &period, &ppr_options,
2457                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2458         }
2459
2460         ahd_lock(ahd, &flags);
2461         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2462                          AHD_TRANS_GOAL, FALSE);
2463         ahd_unlock(ahd, &flags);
2464 }
2465
2466 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2467 {
2468         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2469         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2470         struct ahd_tmode_tstate *tstate;
2471         struct ahd_initiator_tinfo *tinfo
2472                 = ahd_fetch_transinfo(ahd,
2473                                       starget->channel + 'A',
2474                                       shost->this_id, starget->id, &tstate);
2475         struct ahd_devinfo devinfo;
2476         unsigned int ppr_options = tinfo->goal.ppr_options
2477                 & ~MSG_EXT_PPR_DT_REQ;
2478         unsigned int period = tinfo->goal.period;
2479         unsigned int width = tinfo->goal.width;
2480         unsigned long flags;
2481
2482 #ifdef AHD_DEBUG
2483         if ((ahd_debug & AHD_SHOW_DV) != 0)
2484                 printk("%s: %s DT\n", ahd_name(ahd),
2485                        dt ? "enabling" : "disabling");
2486 #endif
2487         if (dt && spi_max_width(starget)) {
2488                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2489                 if (!width)
2490                         ahd_linux_set_width(starget, 1);
2491         } else {
2492                 if (period <= 9)
2493                         period = 10; /* If resetting DT, period must be >= 25ns */
2494                 /* IU is invalid without DT set */
2495                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2496         }
2497         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2498                             starget->channel + 'A', ROLE_INITIATOR);
2499         ahd_find_syncrate(ahd, &period, &ppr_options,
2500                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2501
2502         ahd_lock(ahd, &flags);
2503         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2504                          ppr_options, AHD_TRANS_GOAL, FALSE);
2505         ahd_unlock(ahd, &flags);
2506 }
2507
2508 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2509 {
2510         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2511         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2512         struct ahd_tmode_tstate *tstate;
2513         struct ahd_initiator_tinfo *tinfo
2514                 = ahd_fetch_transinfo(ahd,
2515                                       starget->channel + 'A',
2516                                       shost->this_id, starget->id, &tstate);
2517         struct ahd_devinfo devinfo;
2518         unsigned int ppr_options = tinfo->goal.ppr_options
2519                 & ~MSG_EXT_PPR_QAS_REQ;
2520         unsigned int period = tinfo->goal.period;
2521         unsigned int dt;
2522         unsigned long flags;
2523
2524 #ifdef AHD_DEBUG
2525         if ((ahd_debug & AHD_SHOW_DV) != 0)
2526                 printk("%s: %s QAS\n", ahd_name(ahd),
2527                        qas ? "enabling" : "disabling");
2528 #endif
2529
2530         if (qas) {
2531                 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2532         }
2533
2534         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2535
2536         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2537                             starget->channel + 'A', ROLE_INITIATOR);
2538         ahd_find_syncrate(ahd, &period, &ppr_options,
2539                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2540
2541         ahd_lock(ahd, &flags);
2542         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2543                          ppr_options, AHD_TRANS_GOAL, FALSE);
2544         ahd_unlock(ahd, &flags);
2545 }
2546
2547 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2548 {
2549         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2550         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2551         struct ahd_tmode_tstate *tstate;
2552         struct ahd_initiator_tinfo *tinfo
2553                 = ahd_fetch_transinfo(ahd,
2554                                       starget->channel + 'A',
2555                                       shost->this_id, starget->id, &tstate);
2556         struct ahd_devinfo devinfo;
2557         unsigned int ppr_options = tinfo->goal.ppr_options
2558                 & ~MSG_EXT_PPR_IU_REQ;
2559         unsigned int period = tinfo->goal.period;
2560         unsigned int dt;
2561         unsigned long flags;
2562
2563 #ifdef AHD_DEBUG
2564         if ((ahd_debug & AHD_SHOW_DV) != 0)
2565                 printk("%s: %s IU\n", ahd_name(ahd),
2566                        iu ? "enabling" : "disabling");
2567 #endif
2568
2569         if (iu && spi_max_width(starget)) {
2570                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2571                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2572         }
2573
2574         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2575
2576         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2577                             starget->channel + 'A', ROLE_INITIATOR);
2578         ahd_find_syncrate(ahd, &period, &ppr_options,
2579                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2580
2581         ahd_lock(ahd, &flags);
2582         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2583                          ppr_options, AHD_TRANS_GOAL, FALSE);
2584         ahd_unlock(ahd, &flags);
2585 }
2586
2587 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2588 {
2589         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2590         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2591         struct ahd_tmode_tstate *tstate;
2592         struct ahd_initiator_tinfo *tinfo
2593                 = ahd_fetch_transinfo(ahd,
2594                                       starget->channel + 'A',
2595                                       shost->this_id, starget->id, &tstate);
2596         struct ahd_devinfo devinfo;
2597         unsigned int ppr_options = tinfo->goal.ppr_options
2598                 & ~MSG_EXT_PPR_RD_STRM;
2599         unsigned int period = tinfo->goal.period;
2600         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2601         unsigned long flags;
2602
2603 #ifdef AHD_DEBUG
2604         if ((ahd_debug & AHD_SHOW_DV) != 0)
2605                 printk("%s: %s Read Streaming\n", ahd_name(ahd),
2606                        rdstrm  ? "enabling" : "disabling");
2607 #endif
2608
2609         if (rdstrm && spi_max_width(starget))
2610                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2611
2612         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2613                             starget->channel + 'A', ROLE_INITIATOR);
2614         ahd_find_syncrate(ahd, &period, &ppr_options,
2615                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2616
2617         ahd_lock(ahd, &flags);
2618         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2619                          ppr_options, AHD_TRANS_GOAL, FALSE);
2620         ahd_unlock(ahd, &flags);
2621 }
2622
2623 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2624 {
2625         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2626         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2627         struct ahd_tmode_tstate *tstate;
2628         struct ahd_initiator_tinfo *tinfo
2629                 = ahd_fetch_transinfo(ahd,
2630                                       starget->channel + 'A',
2631                                       shost->this_id, starget->id, &tstate);
2632         struct ahd_devinfo devinfo;
2633         unsigned int ppr_options = tinfo->goal.ppr_options
2634                 & ~MSG_EXT_PPR_WR_FLOW;
2635         unsigned int period = tinfo->goal.period;
2636         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2637         unsigned long flags;
2638
2639 #ifdef AHD_DEBUG
2640         if ((ahd_debug & AHD_SHOW_DV) != 0)
2641                 printk("%s: %s Write Flow Control\n", ahd_name(ahd),
2642                        wrflow ? "enabling" : "disabling");
2643 #endif
2644
2645         if (wrflow && spi_max_width(starget))
2646                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2647
2648         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2649                             starget->channel + 'A', ROLE_INITIATOR);
2650         ahd_find_syncrate(ahd, &period, &ppr_options,
2651                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2652
2653         ahd_lock(ahd, &flags);
2654         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2655                          ppr_options, AHD_TRANS_GOAL, FALSE);
2656         ahd_unlock(ahd, &flags);
2657 }
2658
2659 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2660 {
2661         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2662         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2663         struct ahd_tmode_tstate *tstate;
2664         struct ahd_initiator_tinfo *tinfo
2665                 = ahd_fetch_transinfo(ahd,
2666                                       starget->channel + 'A',
2667                                       shost->this_id, starget->id, &tstate);
2668         struct ahd_devinfo devinfo;
2669         unsigned int ppr_options = tinfo->goal.ppr_options
2670                 & ~MSG_EXT_PPR_RTI;
2671         unsigned int period = tinfo->goal.period;
2672         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2673         unsigned long flags;
2674
2675         if ((ahd->features & AHD_RTI) == 0) {
2676 #ifdef AHD_DEBUG
2677                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2678                         printk("%s: RTI not available\n", ahd_name(ahd));
2679 #endif
2680                 return;
2681         }
2682
2683 #ifdef AHD_DEBUG
2684         if ((ahd_debug & AHD_SHOW_DV) != 0)
2685                 printk("%s: %s RTI\n", ahd_name(ahd),
2686                        rti ? "enabling" : "disabling");
2687 #endif
2688
2689         if (rti && spi_max_width(starget))
2690                 ppr_options |= MSG_EXT_PPR_RTI;
2691
2692         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2693                             starget->channel + 'A', ROLE_INITIATOR);
2694         ahd_find_syncrate(ahd, &period, &ppr_options,
2695                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2696
2697         ahd_lock(ahd, &flags);
2698         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2699                          ppr_options, AHD_TRANS_GOAL, FALSE);
2700         ahd_unlock(ahd, &flags);
2701 }
2702
2703 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2704 {
2705         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2706         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2707         struct ahd_tmode_tstate *tstate;
2708         struct ahd_initiator_tinfo *tinfo
2709                 = ahd_fetch_transinfo(ahd,
2710                                       starget->channel + 'A',
2711                                       shost->this_id, starget->id, &tstate);
2712         struct ahd_devinfo devinfo;
2713         unsigned int ppr_options = tinfo->goal.ppr_options
2714                 & ~MSG_EXT_PPR_PCOMP_EN;
2715         unsigned int period = tinfo->goal.period;
2716         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2717         unsigned long flags;
2718
2719 #ifdef AHD_DEBUG
2720         if ((ahd_debug & AHD_SHOW_DV) != 0)
2721                 printk("%s: %s Precompensation\n", ahd_name(ahd),
2722                        pcomp ? "Enable" : "Disable");
2723 #endif
2724
2725         if (pcomp && spi_max_width(starget)) {
2726                 uint8_t precomp;
2727
2728                 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2729                         const struct ahd_linux_iocell_opts *iocell_opts;
2730
2731                         iocell_opts = &aic79xx_iocell_info[ahd->unit];
2732                         precomp = iocell_opts->precomp;
2733                 } else {
2734                         precomp = AIC79XX_DEFAULT_PRECOMP;
2735                 }
2736                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2737                 AHD_SET_PRECOMP(ahd, precomp);
2738         } else {
2739                 AHD_SET_PRECOMP(ahd, 0);
2740         }
2741
2742         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2743                             starget->channel + 'A', ROLE_INITIATOR);
2744         ahd_find_syncrate(ahd, &period, &ppr_options,
2745                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2746
2747         ahd_lock(ahd, &flags);
2748         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2749                          ppr_options, AHD_TRANS_GOAL, FALSE);
2750         ahd_unlock(ahd, &flags);
2751 }
2752
2753 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2754 {
2755         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2756         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2757         struct ahd_tmode_tstate *tstate;
2758         struct ahd_initiator_tinfo *tinfo
2759                 = ahd_fetch_transinfo(ahd,
2760                                       starget->channel + 'A',
2761                                       shost->this_id, starget->id, &tstate);
2762         struct ahd_devinfo devinfo;
2763         unsigned int ppr_options = tinfo->goal.ppr_options
2764                 & ~MSG_EXT_PPR_HOLD_MCS;
2765         unsigned int period = tinfo->goal.period;
2766         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2767         unsigned long flags;
2768
2769         if (hold && spi_max_width(starget))
2770                 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2771
2772         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2773                             starget->channel + 'A', ROLE_INITIATOR);
2774         ahd_find_syncrate(ahd, &period, &ppr_options,
2775                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2776
2777         ahd_lock(ahd, &flags);
2778         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2779                          ppr_options, AHD_TRANS_GOAL, FALSE);
2780         ahd_unlock(ahd, &flags);
2781 }
2782
2783 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2784 {
2785         struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2786         unsigned long flags;
2787         u8 mode;
2788
2789         ahd_lock(ahd, &flags);
2790         ahd_pause(ahd);
2791         mode = ahd_inb(ahd, SBLKCTL);
2792         ahd_unpause(ahd);
2793         ahd_unlock(ahd, &flags);
2794
2795         if (mode & ENAB40)
2796                 spi_signalling(shost) = SPI_SIGNAL_LVD;
2797         else if (mode & ENAB20)
2798                 spi_signalling(shost) = SPI_SIGNAL_SE;
2799         else
2800                 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2801 }
2802
2803 static struct spi_function_template ahd_linux_transport_functions = {
2804         .set_offset     = ahd_linux_set_offset,
2805         .show_offset    = 1,
2806         .set_period     = ahd_linux_set_period,
2807         .show_period    = 1,
2808         .set_width      = ahd_linux_set_width,
2809         .show_width     = 1,
2810         .set_dt         = ahd_linux_set_dt,
2811         .show_dt        = 1,
2812         .set_iu         = ahd_linux_set_iu,
2813         .show_iu        = 1,
2814         .set_qas        = ahd_linux_set_qas,
2815         .show_qas       = 1,
2816         .set_rd_strm    = ahd_linux_set_rd_strm,
2817         .show_rd_strm   = 1,
2818         .set_wr_flow    = ahd_linux_set_wr_flow,
2819         .show_wr_flow   = 1,
2820         .set_rti        = ahd_linux_set_rti,
2821         .show_rti       = 1,
2822         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2823         .show_pcomp_en  = 1,
2824         .set_hold_mcs   = ahd_linux_set_hold_mcs,
2825         .show_hold_mcs  = 1,
2826         .get_signalling = ahd_linux_get_signalling,
2827 };
2828
2829 static int __init
2830 ahd_linux_init(void)
2831 {
2832         int     error = 0;
2833
2834         /*
2835          * If we've been passed any parameters, process them now.
2836          */
2837         if (aic79xx)
2838                 aic79xx_setup(aic79xx);
2839
2840         ahd_linux_transport_template =
2841                 spi_attach_transport(&ahd_linux_transport_functions);
2842         if (!ahd_linux_transport_template)
2843                 return -ENODEV;
2844
2845         scsi_transport_reserve_device(ahd_linux_transport_template,
2846                                       sizeof(struct ahd_linux_device));
2847
2848         error = ahd_linux_pci_init();
2849         if (error)
2850                 spi_release_transport(ahd_linux_transport_template);
2851         return error;
2852 }
2853
2854 static void __exit
2855 ahd_linux_exit(void)
2856 {
2857         ahd_linux_pci_exit();
2858         spi_release_transport(ahd_linux_transport_template);
2859 }
2860
2861 module_init(ahd_linux_init);
2862 module_exit(ahd_linux_exit);