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