[SCSI] aic79xx: fix up transport settings
[linux-2.6] / 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 /*
52  * Include aiclib.c as part of our
53  * "module dependencies are hard" work around.
54  */
55 #include "aiclib.c"
56
57 #include <linux/init.h>         /* __setup */
58 #include <linux/mm.h>           /* For fetching system memory size */
59 #include <linux/blkdev.h>               /* For block_size() */
60 #include <linux/delay.h>        /* For ssleep/msleep */
61
62 /*
63  * Lock protecting manipulation of the ahd softc list.
64  */
65 spinlock_t ahd_list_spinlock;
66
67 /*
68  * Bucket size for counting good commands in between bad ones.
69  */
70 #define AHD_LINUX_ERR_THRESH    1000
71
72 /*
73  * Set this to the delay in seconds after SCSI bus reset.
74  * Note, we honor this only for the initial bus reset.
75  * The scsi error recovery code performs its own bus settle
76  * delay handling for error recovery actions.
77  */
78 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
79 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
80 #else
81 #define AIC79XX_RESET_DELAY 5000
82 #endif
83
84 /*
85  * To change the default number of tagged transactions allowed per-device,
86  * add a line to the lilo.conf file like:
87  * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
88  * which will result in the first four devices on the first two
89  * controllers being set to a tagged queue depth of 32.
90  *
91  * The tag_commands is an array of 16 to allow for wide and twin adapters.
92  * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
93  * for channel 1.
94  */
95 typedef struct {
96         uint16_t tag_commands[16];      /* Allow for wide/twin adapters. */
97 } adapter_tag_info_t;
98
99 /*
100  * Modify this as you see fit for your system.
101  *
102  * 0                    tagged queuing disabled
103  * 1 <= n <= 253        n == max tags ever dispatched.
104  *
105  * The driver will throttle the number of commands dispatched to a
106  * device if it returns queue full.  For devices with a fixed maximum
107  * queue depth, the driver will eventually determine this depth and
108  * lock it in (a console message is printed to indicate that a lock
109  * has occurred).  On some devices, queue full is returned for a temporary
110  * resource shortage.  These devices will return queue full at varying
111  * depths.  The driver will throttle back when the queue fulls occur and
112  * attempt to slowly increase the depth over time as the device recovers
113  * from the resource shortage.
114  *
115  * In this example, the first line will disable tagged queueing for all
116  * the devices on the first probed aic79xx adapter.
117  *
118  * The second line enables tagged queueing with 4 commands/LUN for IDs
119  * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
120  * driver to attempt to use up to 64 tags for ID 1.
121  *
122  * The third line is the same as the first line.
123  *
124  * The fourth line disables tagged queueing for devices 0 and 3.  It
125  * enables tagged queueing for the other IDs, with 16 commands/LUN
126  * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
127  * IDs 2, 5-7, and 9-15.
128  */
129
130 /*
131  * NOTE: The below structure is for reference only, the actual structure
132  *       to modify in order to change things is just below this comment block.
133 adapter_tag_info_t aic79xx_tag_info[] =
134 {
135         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
136         {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
137         {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
138         {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
139 };
140 */
141
142 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
143 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
144 #else
145 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
146 #endif
147
148 #define AIC79XX_CONFIGED_TAG_COMMANDS {                                 \
149         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
150         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
151         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
152         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
153         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
154         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
155         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE,               \
156         AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE                \
157 }
158
159 /*
160  * By default, use the number of commands specified by
161  * the users kernel configuration.
162  */
163 static adapter_tag_info_t aic79xx_tag_info[] =
164 {
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         {AIC79XX_CONFIGED_TAG_COMMANDS},
173         {AIC79XX_CONFIGED_TAG_COMMANDS},
174         {AIC79XX_CONFIGED_TAG_COMMANDS},
175         {AIC79XX_CONFIGED_TAG_COMMANDS},
176         {AIC79XX_CONFIGED_TAG_COMMANDS},
177         {AIC79XX_CONFIGED_TAG_COMMANDS},
178         {AIC79XX_CONFIGED_TAG_COMMANDS},
179         {AIC79XX_CONFIGED_TAG_COMMANDS},
180         {AIC79XX_CONFIGED_TAG_COMMANDS}
181 };
182
183 /*
184  * The I/O cell on the chip is very configurable in respect to its analog
185  * characteristics.  Set the defaults here; they can be overriden with
186  * the proper insmod parameters.
187  */
188 struct ahd_linux_iocell_opts
189 {
190         uint8_t precomp;
191         uint8_t slewrate;
192         uint8_t amplitude;
193 };
194 #define AIC79XX_DEFAULT_PRECOMP         0xFF
195 #define AIC79XX_DEFAULT_SLEWRATE        0xFF
196 #define AIC79XX_DEFAULT_AMPLITUDE       0xFF
197 #define AIC79XX_DEFAULT_IOOPTS                  \
198 {                                               \
199         AIC79XX_DEFAULT_PRECOMP,                \
200         AIC79XX_DEFAULT_SLEWRATE,               \
201         AIC79XX_DEFAULT_AMPLITUDE               \
202 }
203 #define AIC79XX_PRECOMP_INDEX   0
204 #define AIC79XX_SLEWRATE_INDEX  1
205 #define AIC79XX_AMPLITUDE_INDEX 2
206 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
207 {
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         AIC79XX_DEFAULT_IOOPTS,
216         AIC79XX_DEFAULT_IOOPTS,
217         AIC79XX_DEFAULT_IOOPTS,
218         AIC79XX_DEFAULT_IOOPTS,
219         AIC79XX_DEFAULT_IOOPTS,
220         AIC79XX_DEFAULT_IOOPTS,
221         AIC79XX_DEFAULT_IOOPTS,
222         AIC79XX_DEFAULT_IOOPTS,
223         AIC79XX_DEFAULT_IOOPTS
224 };
225
226 /*
227  * There should be a specific return value for this in scsi.h, but
228  * it seems that most drivers ignore it.
229  */
230 #define DID_UNDERFLOW   DID_ERROR
231
232 void
233 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
234 {
235         printk("(scsi%d:%c:%d:%d): ",
236                ahd->platform_data->host->host_no,
237                scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
238                scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
239                scb != NULL ? SCB_GET_LUN(scb) : -1);
240 }
241
242 /*
243  * XXX - these options apply unilaterally to _all_ adapters
244  *       cards in the system.  This should be fixed.  Exceptions to this
245  *       rule are noted in the comments.
246  */
247
248 /*
249  * Skip the scsi bus reset.  Non 0 make us skip the reset at startup.  This
250  * has no effect on any later resets that might occur due to things like
251  * SCSI bus timeouts.
252  */
253 static uint32_t aic79xx_no_reset;
254
255 /*
256  * Certain PCI motherboards will scan PCI devices from highest to lowest,
257  * others scan from lowest to highest, and they tend to do all kinds of
258  * strange things when they come into contact with PCI bridge chips.  The
259  * net result of all this is that the PCI card that is actually used to boot
260  * the machine is very hard to detect.  Most motherboards go from lowest
261  * PCI slot number to highest, and the first SCSI controller found is the
262  * one you boot from.  The only exceptions to this are when a controller
263  * has its BIOS disabled.  So, we by default sort all of our SCSI controllers
264  * from lowest PCI slot number to highest PCI slot number.  We also force
265  * all controllers with their BIOS disabled to the end of the list.  This
266  * works on *almost* all computers.  Where it doesn't work, we have this
267  * option.  Setting this option to non-0 will reverse the order of the sort
268  * to highest first, then lowest, but will still leave cards with their BIOS
269  * disabled at the very end.  That should fix everyone up unless there are
270  * really strange cirumstances.
271  */
272 static uint32_t aic79xx_reverse_scan;
273
274 /*
275  * Should we force EXTENDED translation on a controller.
276  *     0 == Use whatever is in the SEEPROM or default to off
277  *     1 == Use whatever is in the SEEPROM or default to on
278  */
279 static uint32_t aic79xx_extended;
280
281 /*
282  * PCI bus parity checking of the Adaptec controllers.  This is somewhat
283  * dubious at best.  To my knowledge, this option has never actually
284  * solved a PCI parity problem, but on certain machines with broken PCI
285  * chipset configurations, it can generate tons of false error messages.
286  * It's included in the driver for completeness.
287  *   0     = Shut off PCI parity check
288  *   non-0 = Enable PCI parity check
289  *
290  * NOTE: you can't actually pass -1 on the lilo prompt.  So, to set this
291  * variable to -1 you would actually want to simply pass the variable
292  * name without a number.  That will invert the 0 which will result in
293  * -1.
294  */
295 static uint32_t aic79xx_pci_parity = ~0;
296
297 /*
298  * There are lots of broken chipsets in the world.  Some of them will
299  * violate the PCI spec when we issue byte sized memory writes to our
300  * controller.  I/O mapped register access, if allowed by the given
301  * platform, will work in almost all cases.
302  */
303 uint32_t aic79xx_allow_memio = ~0;
304
305 /*
306  * aic79xx_detect() has been run, so register all device arrivals
307  * immediately with the system rather than deferring to the sorted
308  * attachment performed by aic79xx_detect().
309  */
310 int aic79xx_detect_complete;
311
312 /*
313  * So that we can set how long each device is given as a selection timeout.
314  * The table of values goes like this:
315  *   0 - 256ms
316  *   1 - 128ms
317  *   2 - 64ms
318  *   3 - 32ms
319  * We default to 256ms because some older devices need a longer time
320  * to respond to initial selection.
321  */
322 static uint32_t aic79xx_seltime;
323
324 /*
325  * Certain devices do not perform any aging on commands.  Should the
326  * device be saturated by commands in one portion of the disk, it is
327  * possible for transactions on far away sectors to never be serviced.
328  * To handle these devices, we can periodically send an ordered tag to
329  * force all outstanding transactions to be serviced prior to a new
330  * transaction.
331  */
332 uint32_t aic79xx_periodic_otag;
333
334 /*
335  * Module information and settable options.
336  */
337 static char *aic79xx = NULL;
338
339 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
340 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
341 MODULE_LICENSE("Dual BSD/GPL");
342 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
343 module_param(aic79xx, charp, 0444);
344 MODULE_PARM_DESC(aic79xx,
345 "period delimited, options string.\n"
346 "       verbose                 Enable verbose/diagnostic logging\n"
347 "       allow_memio             Allow device registers to be memory mapped\n"
348 "       debug                   Bitmask of debug values to enable\n"
349 "       no_reset                Supress initial bus resets\n"
350 "       extended                Enable extended geometry on all controllers\n"
351 "       periodic_otag           Send an ordered tagged transaction\n"
352 "                               periodically to prevent tag starvation.\n"
353 "                               This may be required by some older disk\n"
354 "                               or drives/RAID arrays.\n"
355 "       reverse_scan            Sort PCI devices highest Bus/Slot to lowest\n"
356 "       tag_info:<tag_str>      Set per-target tag depth\n"
357 "       global_tag_depth:<int>  Global tag depth for all targets on all buses\n"
358 "       slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
359 "       precomp:<pcomp_list>    Set the signal precompensation (0-7).\n"
360 "       amplitude:<int>         Set the signal amplitude (0-7).\n"
361 "       seltime:<int>           Selection Timeout:\n"
362 "                               (0/256ms,1/128ms,2/64ms,3/32ms)\n"
363 "\n"
364 "       Sample /etc/modprobe.conf line:\n"
365 "               Enable verbose logging\n"
366 "               Set tag depth on Controller 2/Target 2 to 10 tags\n"
367 "               Shorten the selection timeout to 128ms\n"
368 "\n"
369 "       options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
370 "\n");
371
372 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
373                                          struct scsi_device *,
374                                          struct scb *);
375 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
376                                          struct scsi_cmnd *cmd);
377 static void ahd_linux_sem_timeout(u_long arg);
378 static int  ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
379 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
380 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
381                                      struct ahd_devinfo *devinfo);
382 static void ahd_linux_device_queue_depth(struct scsi_device *);
383 static int ahd_linux_run_command(struct ahd_softc*,
384                                  struct ahd_linux_device *,
385                                  struct scsi_cmnd *);
386 static void ahd_linux_setup_tag_info_global(char *p);
387 static aic_option_callback_t ahd_linux_setup_tag_info;
388 static aic_option_callback_t ahd_linux_setup_iocell_info;
389 static int  aic79xx_setup(char *c);
390 static int  ahd_linux_next_unit(void);
391
392 /****************************** Inlines ***************************************/
393 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
394
395 static __inline void
396 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
397 {
398         struct scsi_cmnd *cmd;
399         int direction;
400
401         cmd = scb->io_ctx;
402         direction = cmd->sc_data_direction;
403         ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
404         if (cmd->use_sg != 0) {
405                 struct scatterlist *sg;
406
407                 sg = (struct scatterlist *)cmd->request_buffer;
408                 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
409         } else if (cmd->request_bufflen != 0) {
410                 pci_unmap_single(ahd->dev_softc,
411                                  scb->platform_data->buf_busaddr,
412                                  cmd->request_bufflen, direction);
413         }
414 }
415
416 /******************************** Macros **************************************/
417 #define BUILD_SCSIID(ahd, cmd)                                          \
418         ((((cmd)->device->id << TID_SHIFT) & TID) | (ahd)->our_id)
419
420 /*
421  * Try to detect an Adaptec 79XX controller.
422  */
423 static int
424 ahd_linux_detect(struct scsi_host_template *template)
425 {
426         struct  ahd_softc *ahd;
427         int     found;
428         int     error = 0;
429
430         /*
431          * If we've been passed any parameters, process them now.
432          */
433         if (aic79xx)
434                 aic79xx_setup(aic79xx);
435
436         template->proc_name = "aic79xx";
437
438         /*
439          * Initialize our softc list lock prior to
440          * probing for any adapters.
441          */
442         ahd_list_lockinit();
443
444 #ifdef CONFIG_PCI
445         error = ahd_linux_pci_init();
446         if (error)
447                 return error;
448 #endif
449
450         /*
451          * Register with the SCSI layer all
452          * controllers we've found.
453          */
454         found = 0;
455         TAILQ_FOREACH(ahd, &ahd_tailq, links) {
456
457                 if (ahd_linux_register_host(ahd, template) == 0)
458                         found++;
459         }
460         aic79xx_detect_complete++;
461         return found;
462 }
463
464 /*
465  * Return a string describing the driver.
466  */
467 static const char *
468 ahd_linux_info(struct Scsi_Host *host)
469 {
470         static char buffer[512];
471         char    ahd_info[256];
472         char   *bp;
473         struct ahd_softc *ahd;
474
475         bp = &buffer[0];
476         ahd = *(struct ahd_softc **)host->hostdata;
477         memset(bp, 0, sizeof(buffer));
478         strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
479         strcat(bp, AIC79XX_DRIVER_VERSION);
480         strcat(bp, "\n");
481         strcat(bp, "        <");
482         strcat(bp, ahd->description);
483         strcat(bp, ">\n");
484         strcat(bp, "        ");
485         ahd_controller_info(ahd, ahd_info);
486         strcat(bp, ahd_info);
487         strcat(bp, "\n");
488
489         return (bp);
490 }
491
492 /*
493  * Queue an SCB to the controller.
494  */
495 static int
496 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
497 {
498         struct   ahd_softc *ahd;
499         struct   ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
500
501         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
502
503         /*
504          * Close the race of a command that was in the process of
505          * being queued to us just as our simq was frozen.  Let
506          * DV commands through so long as we are only frozen to
507          * perform DV.
508          */
509         if (ahd->platform_data->qfrozen != 0) {
510                 printf("%s: queue frozen\n", ahd_name(ahd));
511
512                 return SCSI_MLQUEUE_HOST_BUSY;
513         }
514
515         /*
516          * Save the callback on completion function.
517          */
518         cmd->scsi_done = scsi_done;
519
520         cmd->result = CAM_REQ_INPROG << 16;
521
522         return ahd_linux_run_command(ahd, dev, cmd);
523 }
524
525 static inline struct scsi_target **
526 ahd_linux_target_in_softc(struct scsi_target *starget)
527 {
528         struct  ahd_softc *ahd =
529                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
530         unsigned int target_offset;
531
532         target_offset = starget->id;
533         if (starget->channel != 0)
534                 target_offset += 8;
535
536         return &ahd->platform_data->starget[target_offset];
537 }
538
539 static int
540 ahd_linux_target_alloc(struct scsi_target *starget)
541 {
542         struct  ahd_softc *ahd =
543                 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
544         unsigned long flags;
545         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
546         struct ahd_linux_target *targ = scsi_transport_target_data(starget);
547         struct ahd_devinfo devinfo;
548         struct ahd_initiator_tinfo *tinfo;
549         struct ahd_tmode_tstate *tstate;
550         char channel = starget->channel + 'A';
551
552         ahd_lock(ahd, &flags);
553
554         BUG_ON(*ahd_targp != NULL);
555
556         *ahd_targp = starget;
557         memset(targ, 0, sizeof(*targ));
558
559         tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
560                                     starget->id, &tstate);
561         ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
562                             CAM_LUN_WILDCARD, channel,
563                             ROLE_INITIATOR);
564         spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
565         if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
566                 spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
567         else
568                 spi_max_offset(starget) = MAX_OFFSET_PACED;
569         spi_max_width(starget) = ahd->features & AHD_WIDE;
570
571         ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
572                          AHD_TRANS_GOAL, /*paused*/FALSE);
573         ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
574                       AHD_TRANS_GOAL, /*paused*/FALSE);
575         ahd_unlock(ahd, &flags);
576
577         return 0;
578 }
579
580 static void
581 ahd_linux_target_destroy(struct scsi_target *starget)
582 {
583         struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
584
585         *ahd_targp = NULL;
586 }
587
588 static int
589 ahd_linux_slave_alloc(struct scsi_device *sdev)
590 {
591         struct  ahd_softc *ahd =
592                 *((struct ahd_softc **)sdev->host->hostdata);
593         struct scsi_target *starget = sdev->sdev_target;
594         struct ahd_linux_target *targ = scsi_transport_target_data(starget);
595         struct ahd_linux_device *dev;
596
597         if (bootverbose)
598                 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
599
600         BUG_ON(targ->sdev[sdev->lun] != NULL);
601
602         dev = scsi_transport_device_data(sdev);
603         memset(dev, 0, sizeof(*dev));
604
605         /*
606          * We start out life using untagged
607          * transactions of which we allow one.
608          */
609         dev->openings = 1;
610
611         /*
612          * Set maxtags to 0.  This will be changed if we
613          * later determine that we are dealing with
614          * a tagged queuing capable device.
615          */
616         dev->maxtags = 0;
617         
618         targ->sdev[sdev->lun] = sdev;
619
620         return (0);
621 }
622
623 static int
624 ahd_linux_slave_configure(struct scsi_device *sdev)
625 {
626         struct  ahd_softc *ahd;
627
628         ahd = *((struct ahd_softc **)sdev->host->hostdata);
629         if (bootverbose)
630                 printf("%s: Slave Configure %d\n", ahd_name(ahd), sdev->id);
631
632         ahd_linux_device_queue_depth(sdev);
633
634         /* Initial Domain Validation */
635         if (!spi_initial_dv(sdev->sdev_target))
636                 spi_dv_device(sdev);
637
638         return 0;
639 }
640
641 static void
642 ahd_linux_slave_destroy(struct scsi_device *sdev)
643 {
644         struct  ahd_softc *ahd;
645         struct  ahd_linux_device *dev = scsi_transport_device_data(sdev);
646         struct  ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
647
648         ahd = *((struct ahd_softc **)sdev->host->hostdata);
649         if (bootverbose)
650                 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
651
652         BUG_ON(dev->active);
653
654         targ->sdev[sdev->lun] = NULL;
655
656 }
657
658 #if defined(__i386__)
659 /*
660  * Return the disk geometry for the given SCSI device.
661  */
662 static int
663 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
664                     sector_t capacity, int geom[])
665 {
666         uint8_t *bh;
667         int      heads;
668         int      sectors;
669         int      cylinders;
670         int      ret;
671         int      extended;
672         struct   ahd_softc *ahd;
673
674         ahd = *((struct ahd_softc **)sdev->host->hostdata);
675
676         bh = scsi_bios_ptable(bdev);
677         if (bh) {
678                 ret = scsi_partsize(bh, capacity,
679                                     &geom[2], &geom[0], &geom[1]);
680                 kfree(bh);
681                 if (ret != -1)
682                         return (ret);
683         }
684         heads = 64;
685         sectors = 32;
686         cylinders = aic_sector_div(capacity, heads, sectors);
687
688         if (aic79xx_extended != 0)
689                 extended = 1;
690         else
691                 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
692         if (extended && cylinders >= 1024) {
693                 heads = 255;
694                 sectors = 63;
695                 cylinders = aic_sector_div(capacity, heads, sectors);
696         }
697         geom[0] = heads;
698         geom[1] = sectors;
699         geom[2] = cylinders;
700         return (0);
701 }
702 #endif
703
704 /*
705  * Abort the current SCSI command(s).
706  */
707 static int
708 ahd_linux_abort(struct scsi_cmnd *cmd)
709 {
710         int error;
711
712         error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
713         if (error != 0)
714                 printf("aic79xx_abort returns 0x%x\n", error);
715         return error;
716 }
717
718 /*
719  * Attempt to send a target reset message to the device that timed out.
720  */
721 static int
722 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
723 {
724         int error;
725
726         error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
727         if (error != 0)
728                 printf("aic79xx_dev_reset returns 0x%x\n", error);
729         return error;
730 }
731
732 /*
733  * Reset the SCSI bus.
734  */
735 static int
736 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
737 {
738         struct ahd_softc *ahd;
739         u_long s;
740         int    found;
741
742         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
743 #ifdef AHD_DEBUG
744         if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
745                 printf("%s: Bus reset called for cmd %p\n",
746                        ahd_name(ahd), cmd);
747 #endif
748         ahd_lock(ahd, &s);
749         found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
750                                   /*initiate reset*/TRUE);
751         ahd_unlock(ahd, &s);
752
753         if (bootverbose)
754                 printf("%s: SCSI bus reset delivered. "
755                        "%d SCBs aborted.\n", ahd_name(ahd), found);
756
757         return (SUCCESS);
758 }
759
760 struct scsi_host_template aic79xx_driver_template = {
761         .module                 = THIS_MODULE,
762         .name                   = "aic79xx",
763         .proc_info              = ahd_linux_proc_info,
764         .info                   = ahd_linux_info,
765         .queuecommand           = ahd_linux_queue,
766         .eh_abort_handler       = ahd_linux_abort,
767         .eh_device_reset_handler = ahd_linux_dev_reset,
768         .eh_bus_reset_handler   = ahd_linux_bus_reset,
769 #if defined(__i386__)
770         .bios_param             = ahd_linux_biosparam,
771 #endif
772         .can_queue              = AHD_MAX_QUEUE,
773         .this_id                = -1,
774         .cmd_per_lun            = 2,
775         .use_clustering         = ENABLE_CLUSTERING,
776         .slave_alloc            = ahd_linux_slave_alloc,
777         .slave_configure        = ahd_linux_slave_configure,
778         .slave_destroy          = ahd_linux_slave_destroy,
779         .target_alloc           = ahd_linux_target_alloc,
780         .target_destroy         = ahd_linux_target_destroy,
781 };
782
783 /******************************** Bus DMA *************************************/
784 int
785 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
786                    bus_size_t alignment, bus_size_t boundary,
787                    dma_addr_t lowaddr, dma_addr_t highaddr,
788                    bus_dma_filter_t *filter, void *filterarg,
789                    bus_size_t maxsize, int nsegments,
790                    bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
791 {
792         bus_dma_tag_t dmat;
793
794         dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
795         if (dmat == NULL)
796                 return (ENOMEM);
797
798         /*
799          * Linux is very simplistic about DMA memory.  For now don't
800          * maintain all specification information.  Once Linux supplies
801          * better facilities for doing these operations, or the
802          * needs of this particular driver change, we might need to do
803          * more here.
804          */
805         dmat->alignment = alignment;
806         dmat->boundary = boundary;
807         dmat->maxsize = maxsize;
808         *ret_tag = dmat;
809         return (0);
810 }
811
812 void
813 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
814 {
815         free(dmat, M_DEVBUF);
816 }
817
818 int
819 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
820                  int flags, bus_dmamap_t *mapp)
821 {
822         *vaddr = pci_alloc_consistent(ahd->dev_softc,
823                                       dmat->maxsize, mapp);
824         if (*vaddr == NULL)
825                 return (ENOMEM);
826         return(0);
827 }
828
829 void
830 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
831                 void* vaddr, bus_dmamap_t map)
832 {
833         pci_free_consistent(ahd->dev_softc, dmat->maxsize,
834                             vaddr, map);
835 }
836
837 int
838 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
839                 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
840                 void *cb_arg, int flags)
841 {
842         /*
843          * Assume for now that this will only be used during
844          * initialization and not for per-transaction buffer mapping.
845          */
846         bus_dma_segment_t stack_sg;
847
848         stack_sg.ds_addr = map;
849         stack_sg.ds_len = dmat->maxsize;
850         cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
851         return (0);
852 }
853
854 void
855 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
856 {
857 }
858
859 int
860 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
861 {
862         /* Nothing to do */
863         return (0);
864 }
865
866 /********************* Platform Dependent Functions ***************************/
867 /*
868  * Compare "left hand" softc with "right hand" softc, returning:
869  * < 0 - lahd has a lower priority than rahd
870  *   0 - Softcs are equal
871  * > 0 - lahd has a higher priority than rahd
872  */
873 int
874 ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
875 {
876         int     value;
877
878         /*
879          * Under Linux, cards are ordered as follows:
880          *      1) PCI devices that are marked as the boot controller.
881          *      2) PCI devices with BIOS enabled sorted by bus/slot/func.
882          *      3) All remaining PCI devices sorted by bus/slot/func.
883          */
884 #if 0
885         value = (lahd->flags & AHD_BOOT_CHANNEL)
886               - (rahd->flags & AHD_BOOT_CHANNEL);
887         if (value != 0)
888                 /* Controllers set for boot have a *higher* priority */
889                 return (value);
890 #endif
891
892         value = (lahd->flags & AHD_BIOS_ENABLED)
893               - (rahd->flags & AHD_BIOS_ENABLED);
894         if (value != 0)
895                 /* Controllers with BIOS enabled have a *higher* priority */
896                 return (value);
897
898         /* Still equal.  Sort by bus/slot/func. */
899         if (aic79xx_reverse_scan != 0)
900                 value = ahd_get_pci_bus(lahd->dev_softc)
901                       - ahd_get_pci_bus(rahd->dev_softc);
902         else
903                 value = ahd_get_pci_bus(rahd->dev_softc)
904                       - ahd_get_pci_bus(lahd->dev_softc);
905         if (value != 0)
906                 return (value);
907         if (aic79xx_reverse_scan != 0)
908                 value = ahd_get_pci_slot(lahd->dev_softc)
909                       - ahd_get_pci_slot(rahd->dev_softc);
910         else
911                 value = ahd_get_pci_slot(rahd->dev_softc)
912                       - ahd_get_pci_slot(lahd->dev_softc);
913         if (value != 0)
914                 return (value);
915
916         value = rahd->channel - lahd->channel;
917         return (value);
918 }
919
920 static void
921 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
922 {
923
924         if ((instance >= 0)
925          && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
926                 uint8_t *iocell_info;
927
928                 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
929                 iocell_info[index] = value & 0xFFFF;
930                 if (bootverbose)
931                         printf("iocell[%d:%ld] = %d\n", instance, index, value);
932         }
933 }
934
935 static void
936 ahd_linux_setup_tag_info_global(char *p)
937 {
938         int tags, i, j;
939
940         tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
941         printf("Setting Global Tags= %d\n", tags);
942
943         for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
944                 for (j = 0; j < AHD_NUM_TARGETS; j++) {
945                         aic79xx_tag_info[i].tag_commands[j] = tags;
946                 }
947         }
948 }
949
950 static void
951 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
952 {
953
954         if ((instance >= 0) && (targ >= 0)
955          && (instance < NUM_ELEMENTS(aic79xx_tag_info))
956          && (targ < AHD_NUM_TARGETS)) {
957                 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
958                 if (bootverbose)
959                         printf("tag_info[%d:%d] = %d\n", instance, targ, value);
960         }
961 }
962
963 /*
964  * Handle Linux boot parameters. This routine allows for assigning a value
965  * to a parameter with a ':' between the parameter and the value.
966  * ie. aic79xx=stpwlev:1,extended
967  */
968 static int
969 aic79xx_setup(char *s)
970 {
971         int     i, n;
972         char   *p;
973         char   *end;
974
975         static struct {
976                 const char *name;
977                 uint32_t *flag;
978         } options[] = {
979                 { "extended", &aic79xx_extended },
980                 { "no_reset", &aic79xx_no_reset },
981                 { "verbose", &aic79xx_verbose },
982                 { "allow_memio", &aic79xx_allow_memio},
983 #ifdef AHD_DEBUG
984                 { "debug", &ahd_debug },
985 #endif
986                 { "reverse_scan", &aic79xx_reverse_scan },
987                 { "periodic_otag", &aic79xx_periodic_otag },
988                 { "pci_parity", &aic79xx_pci_parity },
989                 { "seltime", &aic79xx_seltime },
990                 { "tag_info", NULL },
991                 { "global_tag_depth", NULL},
992                 { "slewrate", NULL },
993                 { "precomp", NULL },
994                 { "amplitude", NULL },
995         };
996
997         end = strchr(s, '\0');
998
999         /*
1000          * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1001          * will never be 0 in this case.
1002          */      
1003         n = 0;  
1004
1005         while ((p = strsep(&s, ",.")) != NULL) {
1006                 if (*p == '\0')
1007                         continue;
1008                 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1009
1010                         n = strlen(options[i].name);
1011                         if (strncmp(options[i].name, p, n) == 0)
1012                                 break;
1013                 }
1014                 if (i == NUM_ELEMENTS(options))
1015                         continue;
1016
1017                 if (strncmp(p, "global_tag_depth", n) == 0) {
1018                         ahd_linux_setup_tag_info_global(p + n);
1019                 } else if (strncmp(p, "tag_info", n) == 0) {
1020                         s = aic_parse_brace_option("tag_info", p + n, end,
1021                             2, ahd_linux_setup_tag_info, 0);
1022                 } else if (strncmp(p, "slewrate", n) == 0) {
1023                         s = aic_parse_brace_option("slewrate",
1024                             p + n, end, 1, ahd_linux_setup_iocell_info,
1025                             AIC79XX_SLEWRATE_INDEX);
1026                 } else if (strncmp(p, "precomp", n) == 0) {
1027                         s = aic_parse_brace_option("precomp",
1028                             p + n, end, 1, ahd_linux_setup_iocell_info,
1029                             AIC79XX_PRECOMP_INDEX);
1030                 } else if (strncmp(p, "amplitude", n) == 0) {
1031                         s = aic_parse_brace_option("amplitude",
1032                             p + n, end, 1, ahd_linux_setup_iocell_info,
1033                             AIC79XX_AMPLITUDE_INDEX);
1034                 } else if (p[n] == ':') {
1035                         *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1036                 } else if (!strncmp(p, "verbose", n)) {
1037                         *(options[i].flag) = 1;
1038                 } else {
1039                         *(options[i].flag) ^= 0xFFFFFFFF;
1040                 }
1041         }
1042         return 1;
1043 }
1044
1045 __setup("aic79xx=", aic79xx_setup);
1046
1047 uint32_t aic79xx_verbose;
1048
1049 int
1050 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1051 {
1052         char    buf[80];
1053         struct  Scsi_Host *host;
1054         char    *new_name;
1055         u_long  s;
1056
1057         template->name = ahd->description;
1058         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1059         if (host == NULL)
1060                 return (ENOMEM);
1061
1062         *((struct ahd_softc **)host->hostdata) = ahd;
1063         ahd_lock(ahd, &s);
1064         scsi_assign_lock(host, &ahd->platform_data->spin_lock);
1065         ahd->platform_data->host = host;
1066         host->can_queue = AHD_MAX_QUEUE;
1067         host->cmd_per_lun = 2;
1068         host->sg_tablesize = AHD_NSEG;
1069         host->this_id = ahd->our_id;
1070         host->irq = ahd->platform_data->irq;
1071         host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1072         host->max_lun = AHD_NUM_LUNS;
1073         host->max_channel = 0;
1074         host->sg_tablesize = AHD_NSEG;
1075         ahd_set_unit(ahd, ahd_linux_next_unit());
1076         sprintf(buf, "scsi%d", host->host_no);
1077         new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1078         if (new_name != NULL) {
1079                 strcpy(new_name, buf);
1080                 ahd_set_name(ahd, new_name);
1081         }
1082         host->unique_id = ahd->unit;
1083         ahd_linux_initialize_scsi_bus(ahd);
1084         ahd_intr_enable(ahd, TRUE);
1085         ahd_unlock(ahd, &s);
1086
1087         host->transportt = ahd_linux_transport_template;
1088
1089         scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
1090         scsi_scan_host(host);
1091         return (0);
1092 }
1093
1094 uint64_t
1095 ahd_linux_get_memsize(void)
1096 {
1097         struct sysinfo si;
1098
1099         si_meminfo(&si);
1100         return ((uint64_t)si.totalram << PAGE_SHIFT);
1101 }
1102
1103 /*
1104  * Find the smallest available unit number to use
1105  * for a new device.  We don't just use a static
1106  * count to handle the "repeated hot-(un)plug"
1107  * scenario.
1108  */
1109 static int
1110 ahd_linux_next_unit(void)
1111 {
1112         struct ahd_softc *ahd;
1113         int unit;
1114
1115         unit = 0;
1116 retry:
1117         TAILQ_FOREACH(ahd, &ahd_tailq, links) {
1118                 if (ahd->unit == unit) {
1119                         unit++;
1120                         goto retry;
1121                 }
1122         }
1123         return (unit);
1124 }
1125
1126 /*
1127  * Place the SCSI bus into a known state by either resetting it,
1128  * or forcing transfer negotiations on the next command to any
1129  * target.
1130  */
1131 static void
1132 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1133 {
1134         u_int target_id;
1135         u_int numtarg;
1136
1137         target_id = 0;
1138         numtarg = 0;
1139
1140         if (aic79xx_no_reset != 0)
1141                 ahd->flags &= ~AHD_RESET_BUS_A;
1142
1143         if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1144                 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1145         else
1146                 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1147
1148         /*
1149          * Force negotiation to async for all targets that
1150          * will not see an initial bus reset.
1151          */
1152         for (; target_id < numtarg; target_id++) {
1153                 struct ahd_devinfo devinfo;
1154                 struct ahd_initiator_tinfo *tinfo;
1155                 struct ahd_tmode_tstate *tstate;
1156
1157                 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1158                                             target_id, &tstate);
1159                 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1160                                     CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1161                 ahd_update_neg_request(ahd, &devinfo, tstate,
1162                                        tinfo, AHD_NEG_ALWAYS);
1163         }
1164         /* Give the bus some time to recover */
1165         if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1166                 ahd_freeze_simq(ahd);
1167                 init_timer(&ahd->platform_data->reset_timer);
1168                 ahd->platform_data->reset_timer.data = (u_long)ahd;
1169                 ahd->platform_data->reset_timer.expires =
1170                     jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
1171                 ahd->platform_data->reset_timer.function =
1172                     (ahd_linux_callback_t *)ahd_release_simq;
1173                 add_timer(&ahd->platform_data->reset_timer);
1174         }
1175 }
1176
1177 int
1178 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1179 {
1180         ahd->platform_data =
1181             malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1182         if (ahd->platform_data == NULL)
1183                 return (ENOMEM);
1184         memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1185         ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1186         ahd_lockinit(ahd);
1187         init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
1188         ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1189         return (0);
1190 }
1191
1192 void
1193 ahd_platform_free(struct ahd_softc *ahd)
1194 {
1195         struct scsi_target *starget;
1196         int i, j;
1197
1198         if (ahd->platform_data != NULL) {
1199                 if (ahd->platform_data->host != NULL) {
1200                         scsi_remove_host(ahd->platform_data->host);
1201                         scsi_host_put(ahd->platform_data->host);
1202                 }
1203
1204                 /* destroy all of the device and target objects */
1205                 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1206                         starget = ahd->platform_data->starget[i];
1207                         if (starget != NULL) {
1208                                 for (j = 0; j < AHD_NUM_LUNS; j++) {
1209                                         struct ahd_linux_target *targ =
1210                                                 scsi_transport_target_data(starget);
1211                                         if (targ->sdev[j] == NULL)
1212                                                 continue;
1213                                         targ->sdev[j] = NULL;
1214                                 }
1215                                 ahd->platform_data->starget[i] = NULL;
1216                         }
1217                 }
1218
1219                 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1220                         free_irq(ahd->platform_data->irq, ahd);
1221                 if (ahd->tags[0] == BUS_SPACE_PIO
1222                  && ahd->bshs[0].ioport != 0)
1223                         release_region(ahd->bshs[0].ioport, 256);
1224                 if (ahd->tags[1] == BUS_SPACE_PIO
1225                  && ahd->bshs[1].ioport != 0)
1226                         release_region(ahd->bshs[1].ioport, 256);
1227                 if (ahd->tags[0] == BUS_SPACE_MEMIO
1228                  && ahd->bshs[0].maddr != NULL) {
1229                         iounmap(ahd->bshs[0].maddr);
1230                         release_mem_region(ahd->platform_data->mem_busaddr,
1231                                            0x1000);
1232                 }
1233                 free(ahd->platform_data, M_DEVBUF);
1234         }
1235 }
1236
1237 void
1238 ahd_platform_init(struct ahd_softc *ahd)
1239 {
1240         /*
1241          * Lookup and commit any modified IO Cell options.
1242          */
1243         if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1244                 struct ahd_linux_iocell_opts *iocell_opts;
1245
1246                 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1247                 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1248                         AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1249                 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1250                         AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1251                 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1252                         AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1253         }
1254
1255 }
1256
1257 void
1258 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1259 {
1260         ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1261                                 SCB_GET_CHANNEL(ahd, scb),
1262                                 SCB_GET_LUN(scb), SCB_LIST_NULL,
1263                                 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1264 }
1265
1266 void
1267 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1268                       ahd_queue_alg alg)
1269 {
1270         struct scsi_target *starget;
1271         struct ahd_linux_target *targ;
1272         struct ahd_linux_device *dev;
1273         struct scsi_device *sdev;
1274         int was_queuing;
1275         int now_queuing;
1276
1277         starget = ahd->platform_data->starget[devinfo->target];
1278         targ = scsi_transport_target_data(starget);
1279         BUG_ON(targ == NULL);
1280         sdev = targ->sdev[devinfo->lun];
1281         if (sdev == NULL)
1282                 return;
1283
1284         dev = scsi_transport_device_data(sdev);
1285
1286         if (dev == NULL)
1287                 return;
1288         was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1289         switch (alg) {
1290         default:
1291         case AHD_QUEUE_NONE:
1292                 now_queuing = 0;
1293                 break; 
1294         case AHD_QUEUE_BASIC:
1295                 now_queuing = AHD_DEV_Q_BASIC;
1296                 break;
1297         case AHD_QUEUE_TAGGED:
1298                 now_queuing = AHD_DEV_Q_TAGGED;
1299                 break;
1300         }
1301         if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1302          && (was_queuing != now_queuing)
1303          && (dev->active != 0)) {
1304                 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1305                 dev->qfrozen++;
1306         }
1307
1308         dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1309         if (now_queuing) {
1310                 u_int usertags;
1311
1312                 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1313                 if (!was_queuing) {
1314                         /*
1315                          * Start out agressively and allow our
1316                          * dynamic queue depth algorithm to take
1317                          * care of the rest.
1318                          */
1319                         dev->maxtags = usertags;
1320                         dev->openings = dev->maxtags - dev->active;
1321                 }
1322                 if (dev->maxtags == 0) {
1323                         /*
1324                          * Queueing is disabled by the user.
1325                          */
1326                         dev->openings = 1;
1327                 } else if (alg == AHD_QUEUE_TAGGED) {
1328                         dev->flags |= AHD_DEV_Q_TAGGED;
1329                         if (aic79xx_periodic_otag != 0)
1330                                 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1331                 } else
1332                         dev->flags |= AHD_DEV_Q_BASIC;
1333         } else {
1334                 /* We can only have one opening. */
1335                 dev->maxtags = 0;
1336                 dev->openings =  1 - dev->active;
1337         }
1338
1339         switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1340         case AHD_DEV_Q_BASIC:
1341                 scsi_adjust_queue_depth(sdev,
1342                                         MSG_SIMPLE_TASK,
1343                                         dev->openings + dev->active);
1344                 break;
1345         case AHD_DEV_Q_TAGGED:
1346                 scsi_adjust_queue_depth(sdev,
1347                                         MSG_ORDERED_TASK,
1348                                         dev->openings + dev->active);
1349                 break;
1350         default:
1351                 /*
1352                  * We allow the OS to queue 2 untagged transactions to
1353                  * us at any time even though we can only execute them
1354                  * serially on the controller/device.  This should
1355                  * remove some latency.
1356                  */
1357                 scsi_adjust_queue_depth(sdev,
1358                                         /*NON-TAGGED*/0,
1359                                         /*queue depth*/2);
1360                 break;
1361         }
1362 }
1363
1364 int
1365 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1366                         int lun, u_int tag, role_t role, uint32_t status)
1367 {
1368         return 0;
1369 }
1370
1371 static u_int
1372 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1373 {
1374         static int warned_user;
1375         u_int tags;
1376
1377         tags = 0;
1378         if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1379                 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
1380
1381                         if (warned_user == 0) {
1382                                 printf(KERN_WARNING
1383 "aic79xx: WARNING: Insufficient tag_info instances\n"
1384 "aic79xx: for installed controllers.  Using defaults\n"
1385 "aic79xx: Please update the aic79xx_tag_info array in\n"
1386 "aic79xx: the aic79xx_osm.c source file.\n");
1387                                 warned_user++;
1388                         }
1389                         tags = AHD_MAX_QUEUE;
1390                 } else {
1391                         adapter_tag_info_t *tag_info;
1392
1393                         tag_info = &aic79xx_tag_info[ahd->unit];
1394                         tags = tag_info->tag_commands[devinfo->target_offset];
1395                         if (tags > AHD_MAX_QUEUE)
1396                                 tags = AHD_MAX_QUEUE;
1397                 }
1398         }
1399         return (tags);
1400 }
1401
1402 /*
1403  * Determines the queue depth for a given device.
1404  */
1405 static void
1406 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1407 {
1408         struct  ahd_devinfo devinfo;
1409         u_int   tags;
1410         struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1411
1412         ahd_compile_devinfo(&devinfo,
1413                             ahd->our_id,
1414                             sdev->sdev_target->id, sdev->lun,
1415                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1416                             ROLE_INITIATOR);
1417         tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1418         if (tags != 0 && sdev->tagged_supported != 0) {
1419
1420                 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
1421                 ahd_print_devinfo(ahd, &devinfo);
1422                 printf("Tagged Queuing enabled.  Depth %d\n", tags);
1423         } else {
1424                 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
1425         }
1426 }
1427
1428 static int
1429 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1430                       struct scsi_cmnd *cmd)
1431 {
1432         struct   scb *scb;
1433         struct   hardware_scb *hscb;
1434         struct   ahd_initiator_tinfo *tinfo;
1435         struct   ahd_tmode_tstate *tstate;
1436         u_int    col_idx;
1437         uint16_t mask;
1438
1439         /*
1440          * Get an scb to use.
1441          */
1442         tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1443                                     cmd->device->id, &tstate);
1444         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1445          || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1446                 col_idx = AHD_NEVER_COL_IDX;
1447         } else {
1448                 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1449                                             cmd->device->lun);
1450         }
1451         if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1452                 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1453                 return SCSI_MLQUEUE_HOST_BUSY;
1454         }
1455
1456         scb->io_ctx = cmd;
1457         scb->platform_data->dev = dev;
1458         hscb = scb->hscb;
1459         cmd->host_scribble = (char *)scb;
1460
1461         /*
1462          * Fill out basics of the HSCB.
1463          */
1464         hscb->control = 0;
1465         hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1466         hscb->lun = cmd->device->lun;
1467         scb->hscb->task_management = 0;
1468         mask = SCB_GET_TARGET_MASK(ahd, scb);
1469
1470         if ((ahd->user_discenable & mask) != 0)
1471                 hscb->control |= DISCENB;
1472
1473         if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1474                 scb->flags |= SCB_PACKETIZED;
1475
1476         if ((tstate->auto_negotiate & mask) != 0) {
1477                 scb->flags |= SCB_AUTO_NEGOTIATE;
1478                 scb->hscb->control |= MK_MESSAGE;
1479         }
1480
1481         if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1482                 int     msg_bytes;
1483                 uint8_t tag_msgs[2];
1484
1485                 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1486                 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1487                         hscb->control |= tag_msgs[0];
1488                         if (tag_msgs[0] == MSG_ORDERED_TASK)
1489                                 dev->commands_since_idle_or_otag = 0;
1490                 } else
1491                 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1492                  && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1493                         hscb->control |= MSG_ORDERED_TASK;
1494                         dev->commands_since_idle_or_otag = 0;
1495                 } else {
1496                         hscb->control |= MSG_SIMPLE_TASK;
1497                 }
1498         }
1499
1500         hscb->cdb_len = cmd->cmd_len;
1501         memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1502
1503         scb->platform_data->xfer_len = 0;
1504         ahd_set_residual(scb, 0);
1505         ahd_set_sense_residual(scb, 0);
1506         scb->sg_count = 0;
1507         if (cmd->use_sg != 0) {
1508                 void    *sg;
1509                 struct   scatterlist *cur_seg;
1510                 u_int    nseg;
1511                 int      dir;
1512
1513                 cur_seg = (struct scatterlist *)cmd->request_buffer;
1514                 dir = cmd->sc_data_direction;
1515                 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1516                                   cmd->use_sg, dir);
1517                 scb->platform_data->xfer_len = 0;
1518                 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1519                         dma_addr_t addr;
1520                         bus_size_t len;
1521
1522                         addr = sg_dma_address(cur_seg);
1523                         len = sg_dma_len(cur_seg);
1524                         scb->platform_data->xfer_len += len;
1525                         sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1526                                           /*last*/nseg == 1);
1527                 }
1528         } else if (cmd->request_bufflen != 0) {
1529                 void *sg;
1530                 dma_addr_t addr;
1531                 int dir;
1532
1533                 sg = scb->sg_list;
1534                 dir = cmd->sc_data_direction;
1535                 addr = pci_map_single(ahd->dev_softc,
1536                                       cmd->request_buffer,
1537                                       cmd->request_bufflen, dir);
1538                 scb->platform_data->xfer_len = cmd->request_bufflen;
1539                 scb->platform_data->buf_busaddr = addr;
1540                 sg = ahd_sg_setup(ahd, scb, sg, addr,
1541                                   cmd->request_bufflen, /*last*/TRUE);
1542         }
1543
1544         LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1545         dev->openings--;
1546         dev->active++;
1547         dev->commands_issued++;
1548
1549         if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1550                 dev->commands_since_idle_or_otag++;
1551         scb->flags |= SCB_ACTIVE;
1552         ahd_queue_scb(ahd, scb);
1553
1554         return 0;
1555 }
1556
1557 /*
1558  * SCSI controller interrupt handler.
1559  */
1560 irqreturn_t
1561 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1562 {
1563         struct  ahd_softc *ahd;
1564         u_long  flags;
1565         int     ours;
1566
1567         ahd = (struct ahd_softc *) dev_id;
1568         ahd_lock(ahd, &flags); 
1569         ours = ahd_intr(ahd);
1570         ahd_unlock(ahd, &flags);
1571         return IRQ_RETVAL(ours);
1572 }
1573
1574 void
1575 ahd_platform_flushwork(struct ahd_softc *ahd)
1576 {
1577
1578 }
1579
1580 void
1581 ahd_send_async(struct ahd_softc *ahd, char channel,
1582                u_int target, u_int lun, ac_code code, void *arg)
1583 {
1584         switch (code) {
1585         case AC_TRANSFER_NEG:
1586         {
1587                 char    buf[80];
1588                 struct  scsi_target *starget;
1589                 struct  ahd_linux_target *targ;
1590                 struct  info_str info;
1591                 struct  ahd_initiator_tinfo *tinfo;
1592                 struct  ahd_tmode_tstate *tstate;
1593                 unsigned int target_ppr_options;
1594
1595                 BUG_ON(target == CAM_TARGET_WILDCARD);
1596
1597                 info.buffer = buf;
1598                 info.length = sizeof(buf);
1599                 info.offset = 0;
1600                 info.pos = 0;
1601                 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1602                                             target, &tstate);
1603
1604                 /*
1605                  * Don't bother reporting results while
1606                  * negotiations are still pending.
1607                  */
1608                 if (tinfo->curr.period != tinfo->goal.period
1609                  || tinfo->curr.width != tinfo->goal.width
1610                  || tinfo->curr.offset != tinfo->goal.offset
1611                  || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1612                         if (bootverbose == 0)
1613                                 break;
1614
1615                 /*
1616                  * Don't bother reporting results that
1617                  * are identical to those last reported.
1618                  */
1619                 starget = ahd->platform_data->starget[target];
1620                 targ = scsi_transport_target_data(starget);
1621                 if (targ == NULL)
1622                         break;
1623
1624                 target_ppr_options =
1625                         (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1626                         + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1627                         + (spi_iu(starget) ?  MSG_EXT_PPR_IU_REQ : 0)
1628                         + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1629                         + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1630                         + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1631                         + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0);
1632
1633                 if (tinfo->curr.period == spi_period(starget)
1634                     && tinfo->curr.width == spi_width(starget)
1635                     && tinfo->curr.offset == spi_offset(starget)
1636                  && tinfo->curr.ppr_options == target_ppr_options)
1637                         if (bootverbose == 0)
1638                                 break;
1639
1640                 spi_period(starget) = tinfo->curr.period;
1641                 spi_width(starget) = tinfo->curr.width;
1642                 spi_offset(starget) = tinfo->curr.offset;
1643                 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1644                 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1645                 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1646                 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1647                 spi_pcomp_en(starget) =  tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1648                 spi_rti(starget) =  tinfo->curr.ppr_options &  MSG_EXT_PPR_RTI ? 1 : 0;
1649                 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1650                 spi_display_xfer_agreement(starget);
1651                 break;
1652         }
1653         case AC_SENT_BDR:
1654         {
1655                 WARN_ON(lun != CAM_LUN_WILDCARD);
1656                 scsi_report_device_reset(ahd->platform_data->host,
1657                                          channel - 'A', target);
1658                 break;
1659         }
1660         case AC_BUS_RESET:
1661                 if (ahd->platform_data->host != NULL) {
1662                         scsi_report_bus_reset(ahd->platform_data->host,
1663                                               channel - 'A');
1664                 }
1665                 break;
1666         default:
1667                 panic("ahd_send_async: Unexpected async event");
1668         }
1669 }
1670
1671 /*
1672  * Calls the higher level scsi done function and frees the scb.
1673  */
1674 void
1675 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1676 {
1677         struct scsi_cmnd *cmd;
1678         struct    ahd_linux_device *dev;
1679
1680         if ((scb->flags & SCB_ACTIVE) == 0) {
1681                 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1682                 ahd_dump_card_state(ahd);
1683                 panic("Stopping for safety");
1684         }
1685         LIST_REMOVE(scb, pending_links);
1686         cmd = scb->io_ctx;
1687         dev = scb->platform_data->dev;
1688         dev->active--;
1689         dev->openings++;
1690         if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1691                 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1692                 dev->qfrozen--;
1693         }
1694         ahd_linux_unmap_scb(ahd, scb);
1695
1696         /*
1697          * Guard against stale sense data.
1698          * The Linux mid-layer assumes that sense
1699          * was retrieved anytime the first byte of
1700          * the sense buffer looks "sane".
1701          */
1702         cmd->sense_buffer[0] = 0;
1703         if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1704                 uint32_t amount_xferred;
1705
1706                 amount_xferred =
1707                     ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1708                 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1709 #ifdef AHD_DEBUG
1710                         if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1711                                 ahd_print_path(ahd, scb);
1712                                 printf("Set CAM_UNCOR_PARITY\n");
1713                         }
1714 #endif
1715                         ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1716 #ifdef AHD_REPORT_UNDERFLOWS
1717                 /*
1718                  * This code is disabled by default as some
1719                  * clients of the SCSI system do not properly
1720                  * initialize the underflow parameter.  This
1721                  * results in spurious termination of commands
1722                  * that complete as expected (e.g. underflow is
1723                  * allowed as command can return variable amounts
1724                  * of data.
1725                  */
1726                 } else if (amount_xferred < scb->io_ctx->underflow) {
1727                         u_int i;
1728
1729                         ahd_print_path(ahd, scb);
1730                         printf("CDB:");
1731                         for (i = 0; i < scb->io_ctx->cmd_len; i++)
1732                                 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1733                         printf("\n");
1734                         ahd_print_path(ahd, scb);
1735                         printf("Saw underflow (%ld of %ld bytes). "
1736                                "Treated as error\n",
1737                                 ahd_get_residual(scb),
1738                                 ahd_get_transfer_length(scb));
1739                         ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1740 #endif
1741                 } else {
1742                         ahd_set_transaction_status(scb, CAM_REQ_CMP);
1743                 }
1744         } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1745                 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1746         }
1747
1748         if (dev->openings == 1
1749          && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1750          && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1751                 dev->tag_success_count++;
1752         /*
1753          * Some devices deal with temporary internal resource
1754          * shortages by returning queue full.  When the queue
1755          * full occurrs, we throttle back.  Slowly try to get
1756          * back to our previous queue depth.
1757          */
1758         if ((dev->openings + dev->active) < dev->maxtags
1759          && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1760                 dev->tag_success_count = 0;
1761                 dev->openings++;
1762         }
1763
1764         if (dev->active == 0)
1765                 dev->commands_since_idle_or_otag = 0;
1766
1767         if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1768                 printf("Recovery SCB completes\n");
1769                 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1770                  || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1771                         ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1772                 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
1773                         ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
1774                         up(&ahd->platform_data->eh_sem);
1775                 }
1776         }
1777
1778         ahd_free_scb(ahd, scb);
1779         ahd_linux_queue_cmd_complete(ahd, cmd);
1780 }
1781
1782 static void
1783 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1784                              struct scsi_device *sdev, struct scb *scb)
1785 {
1786         struct  ahd_devinfo devinfo;
1787         struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1788
1789         ahd_compile_devinfo(&devinfo,
1790                             ahd->our_id,
1791                             sdev->sdev_target->id, sdev->lun,
1792                             sdev->sdev_target->channel == 0 ? 'A' : 'B',
1793                             ROLE_INITIATOR);
1794         
1795         /*
1796          * We don't currently trust the mid-layer to
1797          * properly deal with queue full or busy.  So,
1798          * when one occurs, we tell the mid-layer to
1799          * unconditionally requeue the command to us
1800          * so that we can retry it ourselves.  We also
1801          * implement our own throttling mechanism so
1802          * we don't clobber the device with too many
1803          * commands.
1804          */
1805         switch (ahd_get_scsi_status(scb)) {
1806         default:
1807                 break;
1808         case SCSI_STATUS_CHECK_COND:
1809         case SCSI_STATUS_CMD_TERMINATED:
1810         {
1811                 struct scsi_cmnd *cmd;
1812
1813                 /*
1814                  * Copy sense information to the OS's cmd
1815                  * structure if it is available.
1816                  */
1817                 cmd = scb->io_ctx;
1818                 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1819                         struct scsi_status_iu_header *siu;
1820                         u_int sense_size;
1821                         u_int sense_offset;
1822
1823                         if (scb->flags & SCB_SENSE) {
1824                                 sense_size = MIN(sizeof(struct scsi_sense_data)
1825                                                - ahd_get_sense_residual(scb),
1826                                                  sizeof(cmd->sense_buffer));
1827                                 sense_offset = 0;
1828                         } else {
1829                                 /*
1830                                  * Copy only the sense data into the provided
1831                                  * buffer.
1832                                  */
1833                                 siu = (struct scsi_status_iu_header *)
1834                                     scb->sense_data;
1835                                 sense_size = MIN(scsi_4btoul(siu->sense_length),
1836                                                 sizeof(cmd->sense_buffer));
1837                                 sense_offset = SIU_SENSE_OFFSET(siu);
1838                         }
1839
1840                         memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1841                         memcpy(cmd->sense_buffer,
1842                                ahd_get_sense_buf(ahd, scb)
1843                                + sense_offset, sense_size);
1844                         cmd->result |= (DRIVER_SENSE << 24);
1845
1846 #ifdef AHD_DEBUG
1847                         if (ahd_debug & AHD_SHOW_SENSE) {
1848                                 int i;
1849
1850                                 printf("Copied %d bytes of sense data at %d:",
1851                                        sense_size, sense_offset);
1852                                 for (i = 0; i < sense_size; i++) {
1853                                         if ((i & 0xF) == 0)
1854                                                 printf("\n");
1855                                         printf("0x%x ", cmd->sense_buffer[i]);
1856                                 }
1857                                 printf("\n");
1858                         }
1859 #endif
1860                 }
1861                 break;
1862         }
1863         case SCSI_STATUS_QUEUE_FULL:
1864                 /*
1865                  * By the time the core driver has returned this
1866                  * command, all other commands that were queued
1867                  * to us but not the device have been returned.
1868                  * This ensures that dev->active is equal to
1869                  * the number of commands actually queued to
1870                  * the device.
1871                  */
1872                 dev->tag_success_count = 0;
1873                 if (dev->active != 0) {
1874                         /*
1875                          * Drop our opening count to the number
1876                          * of commands currently outstanding.
1877                          */
1878                         dev->openings = 0;
1879 #ifdef AHD_DEBUG
1880                         if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1881                                 ahd_print_path(ahd, scb);
1882                                 printf("Dropping tag count to %d\n",
1883                                        dev->active);
1884                         }
1885 #endif
1886                         if (dev->active == dev->tags_on_last_queuefull) {
1887
1888                                 dev->last_queuefull_same_count++;
1889                                 /*
1890                                  * If we repeatedly see a queue full
1891                                  * at the same queue depth, this
1892                                  * device has a fixed number of tag
1893                                  * slots.  Lock in this tag depth
1894                                  * so we stop seeing queue fulls from
1895                                  * this device.
1896                                  */
1897                                 if (dev->last_queuefull_same_count
1898                                  == AHD_LOCK_TAGS_COUNT) {
1899                                         dev->maxtags = dev->active;
1900                                         ahd_print_path(ahd, scb);
1901                                         printf("Locking max tag count at %d\n",
1902                                                dev->active);
1903                                 }
1904                         } else {
1905                                 dev->tags_on_last_queuefull = dev->active;
1906                                 dev->last_queuefull_same_count = 0;
1907                         }
1908                         ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1909                         ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1910                         ahd_platform_set_tags(ahd, &devinfo,
1911                                      (dev->flags & AHD_DEV_Q_BASIC)
1912                                    ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1913                         break;
1914                 }
1915                 /*
1916                  * Drop down to a single opening, and treat this
1917                  * as if the target returned BUSY SCSI status.
1918                  */
1919                 dev->openings = 1;
1920                 ahd_platform_set_tags(ahd, &devinfo,
1921                              (dev->flags & AHD_DEV_Q_BASIC)
1922                            ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1923                 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1924         }
1925 }
1926
1927 static void
1928 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1929 {
1930         /*
1931          * Map CAM error codes into Linux Error codes.  We
1932          * avoid the conversion so that the DV code has the
1933          * full error information available when making
1934          * state change decisions.
1935          */
1936         {
1937                 uint32_t status;
1938                 u_int new_status;
1939
1940                 status = ahd_cmd_get_transaction_status(cmd);
1941                 switch (status) {
1942                 case CAM_REQ_INPROG:
1943                 case CAM_REQ_CMP:
1944                 case CAM_SCSI_STATUS_ERROR:
1945                         new_status = DID_OK;
1946                         break;
1947                 case CAM_REQ_ABORTED:
1948                         new_status = DID_ABORT;
1949                         break;
1950                 case CAM_BUSY:
1951                         new_status = DID_BUS_BUSY;
1952                         break;
1953                 case CAM_REQ_INVALID:
1954                 case CAM_PATH_INVALID:
1955                         new_status = DID_BAD_TARGET;
1956                         break;
1957                 case CAM_SEL_TIMEOUT:
1958                         new_status = DID_NO_CONNECT;
1959                         break;
1960                 case CAM_SCSI_BUS_RESET:
1961                 case CAM_BDR_SENT:
1962                         new_status = DID_RESET;
1963                         break;
1964                 case CAM_UNCOR_PARITY:
1965                         new_status = DID_PARITY;
1966                         break;
1967                 case CAM_CMD_TIMEOUT:
1968                         new_status = DID_TIME_OUT;
1969                         break;
1970                 case CAM_UA_ABORT:
1971                 case CAM_REQ_CMP_ERR:
1972                 case CAM_AUTOSENSE_FAIL:
1973                 case CAM_NO_HBA:
1974                 case CAM_DATA_RUN_ERR:
1975                 case CAM_UNEXP_BUSFREE:
1976                 case CAM_SEQUENCE_FAIL:
1977                 case CAM_CCB_LEN_ERR:
1978                 case CAM_PROVIDE_FAIL:
1979                 case CAM_REQ_TERMIO:
1980                 case CAM_UNREC_HBA_ERROR:
1981                 case CAM_REQ_TOO_BIG:
1982                         new_status = DID_ERROR;
1983                         break;
1984                 case CAM_REQUEUE_REQ:
1985                         new_status = DID_REQUEUE;
1986                         break;
1987                 default:
1988                         /* We should never get here */
1989                         new_status = DID_ERROR;
1990                         break;
1991                 }
1992
1993                 ahd_cmd_set_transaction_status(cmd, new_status);
1994         }
1995
1996         cmd->scsi_done(cmd);
1997 }
1998
1999 static void
2000 ahd_linux_sem_timeout(u_long arg)
2001 {
2002         struct  ahd_softc *ahd;
2003         u_long  s;
2004
2005         ahd = (struct ahd_softc *)arg;
2006
2007         ahd_lock(ahd, &s);
2008         if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
2009                 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
2010                 up(&ahd->platform_data->eh_sem);
2011         }
2012         ahd_unlock(ahd, &s);
2013 }
2014
2015 void
2016 ahd_freeze_simq(struct ahd_softc *ahd)
2017 {
2018         ahd->platform_data->qfrozen++;
2019         if (ahd->platform_data->qfrozen == 1) {
2020                 scsi_block_requests(ahd->platform_data->host);
2021                 ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2022                                         CAM_LUN_WILDCARD, SCB_LIST_NULL,
2023                                         ROLE_INITIATOR, CAM_REQUEUE_REQ);
2024         }
2025 }
2026
2027 void
2028 ahd_release_simq(struct ahd_softc *ahd)
2029 {
2030         u_long s;
2031         int    unblock_reqs;
2032
2033         unblock_reqs = 0;
2034         ahd_lock(ahd, &s);
2035         if (ahd->platform_data->qfrozen > 0)
2036                 ahd->platform_data->qfrozen--;
2037         if (ahd->platform_data->qfrozen == 0) {
2038                 unblock_reqs = 1;
2039         }
2040         ahd_unlock(ahd, &s);
2041         /*
2042          * There is still a race here.  The mid-layer
2043          * should keep its own freeze count and use
2044          * a bottom half handler to run the queues
2045          * so we can unblock with our own lock held.
2046          */
2047         if (unblock_reqs)
2048                 scsi_unblock_requests(ahd->platform_data->host);
2049 }
2050
2051 static int
2052 ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2053 {
2054         struct ahd_softc *ahd;
2055         struct ahd_linux_device *dev;
2056         struct scb *pending_scb;
2057         u_int  saved_scbptr;
2058         u_int  active_scbptr;
2059         u_int  last_phase;
2060         u_int  saved_scsiid;
2061         u_int  cdb_byte;
2062         int    retval;
2063         int    was_paused;
2064         int    paused;
2065         int    wait;
2066         int    disconnected;
2067         ahd_mode_state saved_modes;
2068
2069         pending_scb = NULL;
2070         paused = FALSE;
2071         wait = FALSE;
2072         ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2073
2074         printf("%s:%d:%d:%d: Attempting to queue a%s message:",
2075                ahd_name(ahd), cmd->device->channel,
2076                cmd->device->id, cmd->device->lun,
2077                flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2078
2079         printf("CDB:");
2080         for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2081                 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2082         printf("\n");
2083
2084         spin_lock_irq(&ahd->platform_data->spin_lock);
2085
2086         /*
2087          * First determine if we currently own this command.
2088          * Start by searching the device queue.  If not found
2089          * there, check the pending_scb list.  If not found
2090          * at all, and the system wanted us to just abort the
2091          * command, return success.
2092          */
2093         dev = scsi_transport_device_data(cmd->device);
2094
2095         if (dev == NULL) {
2096                 /*
2097                  * No target device for this command exists,
2098                  * so we must not still own the command.
2099                  */
2100                 printf("%s:%d:%d:%d: Is not an active device\n",
2101                        ahd_name(ahd), cmd->device->channel, cmd->device->id,
2102                        cmd->device->lun);
2103                 retval = SUCCESS;
2104                 goto no_cmd;
2105         }
2106
2107         /*
2108          * See if we can find a matching cmd in the pending list.
2109          */
2110         LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2111                 if (pending_scb->io_ctx == cmd)
2112                         break;
2113         }
2114
2115         if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2116
2117                 /* Any SCB for this device will do for a target reset */
2118                 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2119                         if (ahd_match_scb(ahd, pending_scb, cmd->device->id,
2120                                           cmd->device->channel + 'A',
2121                                           CAM_LUN_WILDCARD,
2122                                           SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2123                                 break;
2124                 }
2125         }
2126
2127         if (pending_scb == NULL) {
2128                 printf("%s:%d:%d:%d: Command not found\n",
2129                        ahd_name(ahd), cmd->device->channel, cmd->device->id,
2130                        cmd->device->lun);
2131                 goto no_cmd;
2132         }
2133
2134         if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2135                 /*
2136                  * We can't queue two recovery actions using the same SCB
2137                  */
2138                 retval = FAILED;
2139                 goto  done;
2140         }
2141
2142         /*
2143          * Ensure that the card doesn't do anything
2144          * behind our back.  Also make sure that we
2145          * didn't "just" miss an interrupt that would
2146          * affect this cmd.
2147          */
2148         was_paused = ahd_is_paused(ahd);
2149         ahd_pause_and_flushwork(ahd);
2150         paused = TRUE;
2151
2152         if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2153                 printf("%s:%d:%d:%d: Command already completed\n",
2154                        ahd_name(ahd), cmd->device->channel, cmd->device->id,
2155                        cmd->device->lun);
2156                 goto no_cmd;
2157         }
2158
2159         printf("%s: At time of recovery, card was %spaused\n",
2160                ahd_name(ahd), was_paused ? "" : "not ");
2161         ahd_dump_card_state(ahd);
2162
2163         disconnected = TRUE;
2164         if (flag == SCB_ABORT) {
2165                 if (ahd_search_qinfifo(ahd, cmd->device->id, 
2166                                        cmd->device->channel + 'A',
2167                                        cmd->device->lun, 
2168                                        pending_scb->hscb->tag,
2169                                        ROLE_INITIATOR, CAM_REQ_ABORTED,
2170                                        SEARCH_COMPLETE) > 0) {
2171                         printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2172                                ahd_name(ahd), cmd->device->channel, 
2173                                cmd->device->id, cmd->device->lun);
2174                         retval = SUCCESS;
2175                         goto done;
2176                 }
2177         } else if (ahd_search_qinfifo(ahd, cmd->device->id,
2178                                       cmd->device->channel + 'A',
2179                                       cmd->device->lun, pending_scb->hscb->tag,
2180                                       ROLE_INITIATOR, /*status*/0,
2181                                       SEARCH_COUNT) > 0) {
2182                 disconnected = FALSE;
2183         }
2184
2185         saved_modes = ahd_save_modes(ahd);
2186         ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2187         last_phase = ahd_inb(ahd, LASTPHASE);
2188         saved_scbptr = ahd_get_scbptr(ahd);
2189         active_scbptr = saved_scbptr;
2190         if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2191                 struct scb *bus_scb;
2192
2193                 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2194                 if (bus_scb == pending_scb)
2195                         disconnected = FALSE;
2196                 else if (flag != SCB_ABORT
2197                          && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
2198                          && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2199                         disconnected = FALSE;
2200         }
2201
2202         /*
2203          * At this point, pending_scb is the scb associated with the
2204          * passed in command.  That command is currently active on the
2205          * bus or is in the disconnected state.
2206          */
2207         saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2208         if (last_phase != P_BUSFREE
2209          && (SCB_GET_TAG(pending_scb) == active_scbptr
2210              || (flag == SCB_DEVICE_RESET
2211                  && SCSIID_TARGET(ahd, saved_scsiid) == cmd->device->id))) {
2212
2213                 /*
2214                  * We're active on the bus, so assert ATN
2215                  * and hope that the target responds.
2216                  */
2217                 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2218                 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2219                 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2220                 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2221                 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2222                        ahd_name(ahd), cmd->device->channel,
2223                        cmd->device->id, cmd->device->lun);
2224                 wait = TRUE;
2225         } else if (disconnected) {
2226
2227                 /*
2228                  * Actually re-queue this SCB in an attempt
2229                  * to select the device before it reconnects.
2230                  */
2231                 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2232                 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2233                 pending_scb->hscb->cdb_len = 0;
2234                 pending_scb->hscb->task_attribute = 0;
2235                 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2236
2237                 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2238                         /*
2239                          * Mark the SCB has having an outstanding
2240                          * task management function.  Should the command
2241                          * complete normally before the task management
2242                          * function can be sent, the host will be notified
2243                          * to abort our requeued SCB.
2244                          */
2245                         ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2246                                  pending_scb->hscb->task_management);
2247                 } else {
2248                         /*
2249                          * If non-packetized, set the MK_MESSAGE control
2250                          * bit indicating that we desire to send a message.
2251                          * We also set the disconnected flag since there is
2252                          * no guarantee that our SCB control byte matches
2253                          * the version on the card.  We don't want the
2254                          * sequencer to abort the command thinking an
2255                          * unsolicited reselection occurred.
2256                          */
2257                         pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2258
2259                         /*
2260                          * The sequencer will never re-reference the
2261                          * in-core SCB.  To make sure we are notified
2262                          * during reslection, set the MK_MESSAGE flag in
2263                          * the card's copy of the SCB.
2264                          */
2265                         ahd_outb(ahd, SCB_CONTROL,
2266                                  ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2267                 }
2268
2269                 /*
2270                  * Clear out any entries in the QINFIFO first
2271                  * so we are the next SCB for this target
2272                  * to run.
2273                  */
2274                 ahd_search_qinfifo(ahd, cmd->device->id,
2275                                    cmd->device->channel + 'A', cmd->device->lun,
2276                                    SCB_LIST_NULL, ROLE_INITIATOR,
2277                                    CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2278                 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2279                 ahd_set_scbptr(ahd, saved_scbptr);
2280                 ahd_print_path(ahd, pending_scb);
2281                 printf("Device is disconnected, re-queuing SCB\n");
2282                 wait = TRUE;
2283         } else {
2284                 printf("%s:%d:%d:%d: Unable to deliver message\n",
2285                        ahd_name(ahd), cmd->device->channel,
2286                        cmd->device->id, cmd->device->lun);
2287                 retval = FAILED;
2288                 goto done;
2289         }
2290
2291 no_cmd:
2292         /*
2293          * Our assumption is that if we don't have the command, no
2294          * recovery action was required, so we return success.  Again,
2295          * the semantics of the mid-layer recovery engine are not
2296          * well defined, so this may change in time.
2297          */
2298         retval = SUCCESS;
2299 done:
2300         if (paused)
2301                 ahd_unpause(ahd);
2302         if (wait) {
2303                 struct timer_list timer;
2304                 int ret;
2305
2306                 ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM;
2307                 spin_unlock_irq(&ahd->platform_data->spin_lock);
2308                 init_timer(&timer);
2309                 timer.data = (u_long)ahd;
2310                 timer.expires = jiffies + (5 * HZ);
2311                 timer.function = ahd_linux_sem_timeout;
2312                 add_timer(&timer);
2313                 printf("Recovery code sleeping\n");
2314                 down(&ahd->platform_data->eh_sem);
2315                 printf("Recovery code awake\n");
2316                 ret = del_timer_sync(&timer);
2317                 if (ret == 0) {
2318                         printf("Timer Expired\n");
2319                         retval = FAILED;
2320                 }
2321                 spin_lock_irq(&ahd->platform_data->spin_lock);
2322         }
2323         spin_unlock_irq(&ahd->platform_data->spin_lock);
2324         return (retval);
2325 }
2326
2327 static void ahd_linux_exit(void);
2328
2329 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2330 {
2331         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2332         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2333         struct ahd_devinfo devinfo;
2334         unsigned long flags;
2335
2336         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2337                             starget->channel + 'A', ROLE_INITIATOR);
2338         ahd_lock(ahd, &flags);
2339         ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2340         ahd_unlock(ahd, &flags);
2341 }
2342
2343 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2344 {
2345         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2346         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2347         struct ahd_tmode_tstate *tstate;
2348         struct ahd_initiator_tinfo *tinfo 
2349                 = ahd_fetch_transinfo(ahd,
2350                                       starget->channel + 'A',
2351                                       shost->this_id, starget->id, &tstate);
2352         struct ahd_devinfo devinfo;
2353         unsigned int ppr_options = tinfo->goal.ppr_options;
2354         unsigned int dt;
2355         unsigned long flags;
2356         unsigned long offset = tinfo->goal.offset;
2357
2358 #ifdef AHD_DEBUG
2359         if ((ahd_debug & AHD_SHOW_DV) != 0)
2360                 printf("%s: set period to %d\n", ahd_name(ahd), period);
2361 #endif
2362         if (offset == 0)
2363                 offset = MAX_OFFSET;
2364
2365         if (period < 8)
2366                 period = 8;
2367         if (period < 10) {
2368                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2369                 if (period == 8)
2370                         ppr_options |= MSG_EXT_PPR_IU_REQ;
2371         }
2372
2373         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2374
2375         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2376                             starget->channel + 'A', ROLE_INITIATOR);
2377
2378         /* all PPR requests apart from QAS require wide transfers */
2379         if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2380                 if (spi_width(starget) == 0)
2381                         ppr_options &= MSG_EXT_PPR_QAS_REQ;
2382         }
2383
2384         ahd_find_syncrate(ahd, &period, &ppr_options,
2385                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2386
2387         ahd_lock(ahd, &flags);
2388         ahd_set_syncrate(ahd, &devinfo, period, offset,
2389                          ppr_options, AHD_TRANS_GOAL, FALSE);
2390         ahd_unlock(ahd, &flags);
2391 }
2392
2393 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2394 {
2395         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2396         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2397         struct ahd_tmode_tstate *tstate;
2398         struct ahd_initiator_tinfo *tinfo 
2399                 = ahd_fetch_transinfo(ahd,
2400                                       starget->channel + 'A',
2401                                       shost->this_id, starget->id, &tstate);
2402         struct ahd_devinfo devinfo;
2403         unsigned int ppr_options = 0;
2404         unsigned int period = 0;
2405         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2406         unsigned long flags;
2407
2408 #ifdef AHD_DEBUG
2409         if ((ahd_debug & AHD_SHOW_DV) != 0)
2410                 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2411 #endif
2412
2413         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2414                             starget->channel + 'A', ROLE_INITIATOR);
2415         if (offset != 0) {
2416                 period = tinfo->goal.period;
2417                 ppr_options = tinfo->goal.ppr_options;
2418                 ahd_find_syncrate(ahd, &period, &ppr_options, 
2419                                   dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2420         }
2421
2422         ahd_lock(ahd, &flags);
2423         ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2424                          AHD_TRANS_GOAL, FALSE);
2425         ahd_unlock(ahd, &flags);
2426 }
2427
2428 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2429 {
2430         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2431         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2432         struct ahd_tmode_tstate *tstate;
2433         struct ahd_initiator_tinfo *tinfo 
2434                 = ahd_fetch_transinfo(ahd,
2435                                       starget->channel + 'A',
2436                                       shost->this_id, starget->id, &tstate);
2437         struct ahd_devinfo devinfo;
2438         unsigned int ppr_options = tinfo->goal.ppr_options
2439                 & ~MSG_EXT_PPR_DT_REQ;
2440         unsigned int period = tinfo->goal.period;
2441         unsigned long flags;
2442
2443 #ifdef AHD_DEBUG
2444         if ((ahd_debug & AHD_SHOW_DV) != 0)
2445                 printf("%s: %s DT\n", ahd_name(ahd), 
2446                        dt ? "enabling" : "disabling");
2447 #endif
2448         if (dt) {
2449                 ppr_options |= MSG_EXT_PPR_DT_REQ;
2450                 if (period > 9)
2451                         period = 9; /* at least 12.5ns for DT */
2452         } else {
2453                 if (period <= 9)
2454                         period = 10; /* If resetting DT, period must be >= 25ns */
2455                 /* IU is invalid without DT set */
2456                 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2457         }
2458         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2459                             starget->channel + 'A', ROLE_INITIATOR);
2460         ahd_find_syncrate(ahd, &period, &ppr_options,
2461                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2462
2463         ahd_lock(ahd, &flags);
2464         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2465                          ppr_options, AHD_TRANS_GOAL, FALSE);
2466         ahd_unlock(ahd, &flags);
2467 }
2468
2469 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
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_QAS_REQ;
2481         unsigned int period = tinfo->goal.period;
2482         unsigned int dt;
2483         unsigned long flags;
2484
2485 #ifdef AHD_DEBUG
2486         if ((ahd_debug & AHD_SHOW_DV) != 0)
2487                 printf("%s: %s QAS\n", ahd_name(ahd), 
2488                        qas ? "enabling" : "disabling");
2489 #endif
2490
2491         if (qas) {
2492                 ppr_options |= MSG_EXT_PPR_QAS_REQ; 
2493         }
2494
2495         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2496
2497         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2498                             starget->channel + 'A', ROLE_INITIATOR);
2499         ahd_find_syncrate(ahd, &period, &ppr_options,
2500                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2501
2502         ahd_lock(ahd, &flags);
2503         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2504                          ppr_options, AHD_TRANS_GOAL, FALSE);
2505         ahd_unlock(ahd, &flags);
2506 }
2507
2508 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2509 {
2510         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2511         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2512         struct ahd_tmode_tstate *tstate;
2513         struct ahd_initiator_tinfo *tinfo 
2514                 = ahd_fetch_transinfo(ahd,
2515                                       starget->channel + 'A',
2516                                       shost->this_id, starget->id, &tstate);
2517         struct ahd_devinfo devinfo;
2518         unsigned int ppr_options = tinfo->goal.ppr_options
2519                 & ~MSG_EXT_PPR_IU_REQ;
2520         unsigned int period = tinfo->goal.period;
2521         unsigned int dt;
2522         unsigned long flags;
2523
2524 #ifdef AHD_DEBUG
2525         if ((ahd_debug & AHD_SHOW_DV) != 0)
2526                 printf("%s: %s IU\n", ahd_name(ahd),
2527                        iu ? "enabling" : "disabling");
2528 #endif
2529
2530         if (iu) {
2531                 ppr_options |= MSG_EXT_PPR_IU_REQ;
2532                 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2533         }
2534
2535         dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2536
2537         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2538                             starget->channel + 'A', ROLE_INITIATOR);
2539         ahd_find_syncrate(ahd, &period, &ppr_options,
2540                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2541
2542         ahd_lock(ahd, &flags);
2543         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2544                          ppr_options, AHD_TRANS_GOAL, FALSE);
2545         ahd_unlock(ahd, &flags);
2546 }
2547
2548 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2549 {
2550         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2551         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2552         struct ahd_tmode_tstate *tstate;
2553         struct ahd_initiator_tinfo *tinfo 
2554                 = ahd_fetch_transinfo(ahd,
2555                                       starget->channel + 'A',
2556                                       shost->this_id, starget->id, &tstate);
2557         struct ahd_devinfo devinfo;
2558         unsigned int ppr_options = tinfo->goal.ppr_options
2559                 & ~MSG_EXT_PPR_RD_STRM;
2560         unsigned int period = tinfo->goal.period;
2561         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2562         unsigned long flags;
2563
2564 #ifdef AHD_DEBUG
2565         if ((ahd_debug & AHD_SHOW_DV) != 0)
2566                 printf("%s: %s Read Streaming\n", ahd_name(ahd), 
2567                        rdstrm  ? "enabling" : "disabling");
2568 #endif
2569
2570         if (rdstrm)
2571                 ppr_options |= MSG_EXT_PPR_RD_STRM;
2572
2573         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2574                             starget->channel + 'A', ROLE_INITIATOR);
2575         ahd_find_syncrate(ahd, &period, &ppr_options,
2576                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2577
2578         ahd_lock(ahd, &flags);
2579         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2580                          ppr_options, AHD_TRANS_GOAL, FALSE);
2581         ahd_unlock(ahd, &flags);
2582 }
2583
2584 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2585 {
2586         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2587         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2588         struct ahd_tmode_tstate *tstate;
2589         struct ahd_initiator_tinfo *tinfo 
2590                 = ahd_fetch_transinfo(ahd,
2591                                       starget->channel + 'A',
2592                                       shost->this_id, starget->id, &tstate);
2593         struct ahd_devinfo devinfo;
2594         unsigned int ppr_options = tinfo->goal.ppr_options
2595                 & ~MSG_EXT_PPR_WR_FLOW;
2596         unsigned int period = tinfo->goal.period;
2597         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2598         unsigned long flags;
2599
2600 #ifdef AHD_DEBUG
2601         if ((ahd_debug & AHD_SHOW_DV) != 0)
2602                 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2603                        wrflow ? "enabling" : "disabling");
2604 #endif
2605
2606         if (wrflow)
2607                 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2608
2609         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2610                             starget->channel + 'A', ROLE_INITIATOR);
2611         ahd_find_syncrate(ahd, &period, &ppr_options,
2612                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2613
2614         ahd_lock(ahd, &flags);
2615         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2616                          ppr_options, AHD_TRANS_GOAL, FALSE);
2617         ahd_unlock(ahd, &flags);
2618 }
2619
2620 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2621 {
2622         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2623         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2624         struct ahd_tmode_tstate *tstate;
2625         struct ahd_initiator_tinfo *tinfo 
2626                 = ahd_fetch_transinfo(ahd,
2627                                       starget->channel + 'A',
2628                                       shost->this_id, starget->id, &tstate);
2629         struct ahd_devinfo devinfo;
2630         unsigned int ppr_options = tinfo->goal.ppr_options
2631                 & ~MSG_EXT_PPR_RTI;
2632         unsigned int period = tinfo->goal.period;
2633         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2634         unsigned long flags;
2635
2636         if ((ahd->features & AHD_RTI) == 0) {
2637 #ifdef AHD_DEBUG
2638                 if ((ahd_debug & AHD_SHOW_DV) != 0)
2639                         printf("%s: RTI not available\n", ahd_name(ahd));
2640 #endif
2641                 return;
2642         }
2643
2644 #ifdef AHD_DEBUG
2645         if ((ahd_debug & AHD_SHOW_DV) != 0)
2646                 printf("%s: %s RTI\n", ahd_name(ahd),
2647                        rti ? "enabling" : "disabling");
2648 #endif
2649
2650         if (rti)
2651                 ppr_options |= MSG_EXT_PPR_RTI;
2652
2653         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2654                             starget->channel + 'A', ROLE_INITIATOR);
2655         ahd_find_syncrate(ahd, &period, &ppr_options,
2656                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2657
2658         ahd_lock(ahd, &flags);
2659         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2660                          ppr_options, AHD_TRANS_GOAL, FALSE);
2661         ahd_unlock(ahd, &flags);
2662 }
2663
2664 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2665 {
2666         struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2667         struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2668         struct ahd_tmode_tstate *tstate;
2669         struct ahd_initiator_tinfo *tinfo 
2670                 = ahd_fetch_transinfo(ahd,
2671                                       starget->channel + 'A',
2672                                       shost->this_id, starget->id, &tstate);
2673         struct ahd_devinfo devinfo;
2674         unsigned int ppr_options = tinfo->goal.ppr_options
2675                 & ~MSG_EXT_PPR_PCOMP_EN;
2676         unsigned int period = tinfo->goal.period;
2677         unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2678         unsigned long flags;
2679
2680 #ifdef AHD_DEBUG
2681         if ((ahd_debug & AHD_SHOW_DV) != 0)
2682                 printf("%s: %s Precompensation\n", ahd_name(ahd), 
2683                        pcomp ? "Enable" : "Disable");
2684 #endif
2685
2686         if (pcomp)
2687                 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2688
2689         ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2690                             starget->channel + 'A', ROLE_INITIATOR);
2691         ahd_find_syncrate(ahd, &period, &ppr_options,
2692                           dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2693
2694         ahd_lock(ahd, &flags);
2695         ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2696                          ppr_options, AHD_TRANS_GOAL, FALSE);
2697         ahd_unlock(ahd, &flags);
2698 }
2699
2700 static struct spi_function_template ahd_linux_transport_functions = {
2701         .set_offset     = ahd_linux_set_offset,
2702         .show_offset    = 1,
2703         .set_period     = ahd_linux_set_period,
2704         .show_period    = 1,
2705         .set_width      = ahd_linux_set_width,
2706         .show_width     = 1,
2707         .set_dt         = ahd_linux_set_dt,
2708         .show_dt        = 1,
2709         .set_iu         = ahd_linux_set_iu,
2710         .show_iu        = 1,
2711         .set_qas        = ahd_linux_set_qas,
2712         .show_qas       = 1,
2713         .set_rd_strm    = ahd_linux_set_rd_strm,
2714         .show_rd_strm   = 1,
2715         .set_wr_flow    = ahd_linux_set_wr_flow,
2716         .show_wr_flow   = 1,
2717         .set_rti        = ahd_linux_set_rti,
2718         .show_rti       = 1,
2719         .set_pcomp_en   = ahd_linux_set_pcomp_en,
2720         .show_pcomp_en  = 1,
2721 };
2722
2723
2724
2725 static int __init
2726 ahd_linux_init(void)
2727 {
2728         ahd_linux_transport_template = spi_attach_transport(&ahd_linux_transport_functions);
2729         if (!ahd_linux_transport_template)
2730                 return -ENODEV;
2731         scsi_transport_reserve_target(ahd_linux_transport_template,
2732                                       sizeof(struct ahd_linux_target));
2733         scsi_transport_reserve_device(ahd_linux_transport_template,
2734                                       sizeof(struct ahd_linux_device));
2735         if (ahd_linux_detect(&aic79xx_driver_template) > 0)
2736                 return 0;
2737         spi_release_transport(ahd_linux_transport_template);
2738         ahd_linux_exit();
2739         return -ENODEV;
2740 }
2741
2742 static void __exit
2743 ahd_linux_exit(void)
2744 {
2745         ahd_linux_pci_exit();
2746         spi_release_transport(ahd_linux_transport_template);
2747 }
2748
2749 module_init(ahd_linux_init);
2750 module_exit(ahd_linux_exit);