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[SCSI] use scmd_id(), scmd_channel() throughout code
[deliverable/linux.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
CommitLineData
1da177e4
LT		 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
73a25462
HR		 49static struct scsi_transport_template *ahd_linux_transport_template = NULL;
50
1da177e4 51#include <linux/init.h> /* __setup */
1da177e4 52#include <linux/mm.h> /* For fetching system memory size */
73a25462 53#include <linux/blkdev.h> /* For block_size() */
1da177e4 54#include <linux/delay.h> /* For ssleep/msleep */
017560fc 55#include <linux/device.h>
1da177e4 56
1da177e4
LT		 57/*
58 * Bucket size for counting good commands in between bad ones.
59 */
60#define AHD_LINUX_ERR_THRESH 1000
61
62/*
63 * Set this to the delay in seconds after SCSI bus reset.
64 * Note, we honor this only for the initial bus reset.
65 * The scsi error recovery code performs its own bus settle
66 * delay handling for error recovery actions.
67 */
68#ifdef CONFIG_AIC79XX_RESET_DELAY_MS
69#define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
70#else
71#define AIC79XX_RESET_DELAY 5000
72#endif
73
74/*
75 * To change the default number of tagged transactions allowed per-device,
76 * add a line to the lilo.conf file like:
77 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
78 * which will result in the first four devices on the first two
79 * controllers being set to a tagged queue depth of 32.
80 *
81 * The tag_commands is an array of 16 to allow for wide and twin adapters.
82 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
83 * for channel 1.
84 */
85typedef struct {
86 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
87} adapter_tag_info_t;
88
89/*
90 * Modify this as you see fit for your system.
91 *
92 * 0 tagged queuing disabled
93 * 1 <= n <= 253 n == max tags ever dispatched.
94 *
95 * The driver will throttle the number of commands dispatched to a
96 * device if it returns queue full. For devices with a fixed maximum
97 * queue depth, the driver will eventually determine this depth and
98 * lock it in (a console message is printed to indicate that a lock
99 * has occurred). On some devices, queue full is returned for a temporary
100 * resource shortage. These devices will return queue full at varying
101 * depths. The driver will throttle back when the queue fulls occur and
102 * attempt to slowly increase the depth over time as the device recovers
103 * from the resource shortage.
104 *
105 * In this example, the first line will disable tagged queueing for all
106 * the devices on the first probed aic79xx adapter.
107 *
108 * The second line enables tagged queueing with 4 commands/LUN for IDs
109 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
110 * driver to attempt to use up to 64 tags for ID 1.
111 *
112 * The third line is the same as the first line.
113 *
114 * The fourth line disables tagged queueing for devices 0 and 3. It
115 * enables tagged queueing for the other IDs, with 16 commands/LUN
116 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
117 * IDs 2, 5-7, and 9-15.
118 */
119
120/*
121 * NOTE: The below structure is for reference only, the actual structure
122 * to modify in order to change things is just below this comment block.
123adapter_tag_info_t aic79xx_tag_info[] =
124{
125 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
126 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
127 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
128 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
129};
130*/
131
132#ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
133#define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
134#else
135#define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
136#endif
137
138#define AIC79XX_CONFIGED_TAG_COMMANDS { \
139 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
147}
148
149/*
150 * By default, use the number of commands specified by
151 * the users kernel configuration.
152 */
153static adapter_tag_info_t aic79xx_tag_info[] =
154{
155 {AIC79XX_CONFIGED_TAG_COMMANDS},
156 {AIC79XX_CONFIGED_TAG_COMMANDS},
157 {AIC79XX_CONFIGED_TAG_COMMANDS},
158 {AIC79XX_CONFIGED_TAG_COMMANDS},
159 {AIC79XX_CONFIGED_TAG_COMMANDS},
160 {AIC79XX_CONFIGED_TAG_COMMANDS},
161 {AIC79XX_CONFIGED_TAG_COMMANDS},
162 {AIC79XX_CONFIGED_TAG_COMMANDS},
163 {AIC79XX_CONFIGED_TAG_COMMANDS},
164 {AIC79XX_CONFIGED_TAG_COMMANDS},
165 {AIC79XX_CONFIGED_TAG_COMMANDS},
166 {AIC79XX_CONFIGED_TAG_COMMANDS},
167 {AIC79XX_CONFIGED_TAG_COMMANDS},
168 {AIC79XX_CONFIGED_TAG_COMMANDS},
169 {AIC79XX_CONFIGED_TAG_COMMANDS},
170 {AIC79XX_CONFIGED_TAG_COMMANDS}
171};
172
1da177e4
LT		 173/*
174 * The I/O cell on the chip is very configurable in respect to its analog
175 * characteristics. Set the defaults here; they can be overriden with
176 * the proper insmod parameters.
177 */
178struct ahd_linux_iocell_opts
179{
180 uint8_t precomp;
181 uint8_t slewrate;
182 uint8_t amplitude;
183};
184#define AIC79XX_DEFAULT_PRECOMP 0xFF
185#define AIC79XX_DEFAULT_SLEWRATE 0xFF
186#define AIC79XX_DEFAULT_AMPLITUDE 0xFF
187#define AIC79XX_DEFAULT_IOOPTS \
188{ \
189 AIC79XX_DEFAULT_PRECOMP, \
190 AIC79XX_DEFAULT_SLEWRATE, \
191 AIC79XX_DEFAULT_AMPLITUDE \
192}
193#define AIC79XX_PRECOMP_INDEX 0
194#define AIC79XX_SLEWRATE_INDEX 1
195#define AIC79XX_AMPLITUDE_INDEX 2
196static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
197{
198 AIC79XX_DEFAULT_IOOPTS,
199 AIC79XX_DEFAULT_IOOPTS,
200 AIC79XX_DEFAULT_IOOPTS,
201 AIC79XX_DEFAULT_IOOPTS,
202 AIC79XX_DEFAULT_IOOPTS,
203 AIC79XX_DEFAULT_IOOPTS,
204 AIC79XX_DEFAULT_IOOPTS,
205 AIC79XX_DEFAULT_IOOPTS,
206 AIC79XX_DEFAULT_IOOPTS,
207 AIC79XX_DEFAULT_IOOPTS,
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS
214};
215
216/*
217 * There should be a specific return value for this in scsi.h, but
218 * it seems that most drivers ignore it.
219 */
220#define DID_UNDERFLOW DID_ERROR
221
222void
223ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
224{
225 printk("(scsi%d:%c:%d:%d): ",
226 ahd->platform_data->host->host_no,
227 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
228 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
229 scb != NULL ? SCB_GET_LUN(scb) : -1);
230}
231
232/*
233 * XXX - these options apply unilaterally to _all_ adapters
234 * cards in the system. This should be fixed. Exceptions to this
235 * rule are noted in the comments.
236 */
237
238/*
239 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
240 * has no effect on any later resets that might occur due to things like
241 * SCSI bus timeouts.
242 */
243static uint32_t aic79xx_no_reset;
244
245/*
246 * Certain PCI motherboards will scan PCI devices from highest to lowest,
247 * others scan from lowest to highest, and they tend to do all kinds of
248 * strange things when they come into contact with PCI bridge chips. The
249 * net result of all this is that the PCI card that is actually used to boot
250 * the machine is very hard to detect. Most motherboards go from lowest
251 * PCI slot number to highest, and the first SCSI controller found is the
252 * one you boot from. The only exceptions to this are when a controller
253 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
254 * from lowest PCI slot number to highest PCI slot number. We also force
255 * all controllers with their BIOS disabled to the end of the list. This
256 * works on *almost* all computers. Where it doesn't work, we have this
257 * option. Setting this option to non-0 will reverse the order of the sort
258 * to highest first, then lowest, but will still leave cards with their BIOS
259 * disabled at the very end. That should fix everyone up unless there are
260 * really strange cirumstances.
261 */
262static uint32_t aic79xx_reverse_scan;
263
264/*
265 * Should we force EXTENDED translation on a controller.
266 * 0 == Use whatever is in the SEEPROM or default to off
267 * 1 == Use whatever is in the SEEPROM or default to on
268 */
269static uint32_t aic79xx_extended;
270
271/*
272 * PCI bus parity checking of the Adaptec controllers. This is somewhat
273 * dubious at best. To my knowledge, this option has never actually
274 * solved a PCI parity problem, but on certain machines with broken PCI
275 * chipset configurations, it can generate tons of false error messages.
276 * It's included in the driver for completeness.
277 * 0 = Shut off PCI parity check
278 * non-0 = Enable PCI parity check
279 *
280 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
281 * variable to -1 you would actually want to simply pass the variable
282 * name without a number. That will invert the 0 which will result in
283 * -1.
284 */
285static uint32_t aic79xx_pci_parity = ~0;
286
287/*
288 * There are lots of broken chipsets in the world. Some of them will
289 * violate the PCI spec when we issue byte sized memory writes to our
290 * controller. I/O mapped register access, if allowed by the given
291 * platform, will work in almost all cases.
292 */
293uint32_t aic79xx_allow_memio = ~0;
294
1da177e4
LT		 295/*
296 * So that we can set how long each device is given as a selection timeout.
297 * The table of values goes like this:
298 * 0 - 256ms
299 * 1 - 128ms
300 * 2 - 64ms
301 * 3 - 32ms
302 * We default to 256ms because some older devices need a longer time
303 * to respond to initial selection.
304 */
305static uint32_t aic79xx_seltime;
306
307/*
308 * Certain devices do not perform any aging on commands. Should the
309 * device be saturated by commands in one portion of the disk, it is
310 * possible for transactions on far away sectors to never be serviced.
311 * To handle these devices, we can periodically send an ordered tag to
312 * force all outstanding transactions to be serviced prior to a new
313 * transaction.
314 */
315uint32_t aic79xx_periodic_otag;
316
317/*
318 * Module information and settable options.
319 */
320static char *aic79xx = NULL;
321
322MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
323MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
324MODULE_LICENSE("Dual BSD/GPL");
325MODULE_VERSION(AIC79XX_DRIVER_VERSION);
73a25462 326module_param(aic79xx, charp, 0444);
1da177e4
LT		 327MODULE_PARM_DESC(aic79xx,
328"period delimited, options string.\n"
329" verbose Enable verbose/diagnostic logging\n"
330" allow_memio Allow device registers to be memory mapped\n"
331" debug Bitmask of debug values to enable\n"
332" no_reset Supress initial bus resets\n"
333" extended Enable extended geometry on all controllers\n"
334" periodic_otag Send an ordered tagged transaction\n"
335" periodically to prevent tag starvation.\n"
336" This may be required by some older disk\n"
337" or drives/RAID arrays.\n"
338" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
339" tag_info:<tag_str> Set per-target tag depth\n"
340" global_tag_depth:<int> Global tag depth for all targets on all buses\n"
1da177e4
LT		 341" slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
342" precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
343" amplitude:<int> Set the signal amplitude (0-7).\n"
344" seltime:<int> Selection Timeout:\n"
345" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
346"\n"
347" Sample /etc/modprobe.conf line:\n"
348" Enable verbose logging\n"
349" Set tag depth on Controller 2/Target 2 to 10 tags\n"
350" Shorten the selection timeout to 128ms\n"
351"\n"
352" options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
73a25462 353"\n");
1da177e4
LT		 354
355static void ahd_linux_handle_scsi_status(struct ahd_softc *,
73a25462 356 struct scsi_device *,
1da177e4
LT		 357 struct scb *);
358static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
73a25462 359 struct scsi_cmnd *cmd);
1da177e4 360static void ahd_linux_sem_timeout(u_long arg);
73a25462 361static int ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
1da177e4 362static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
1da177e4
LT		 363static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
364 struct ahd_devinfo *devinfo);
73a25462 365static void ahd_linux_device_queue_depth(struct scsi_device *);
60a13213 366static int ahd_linux_run_command(struct ahd_softc*,
73a25462 367 struct ahd_linux_device *,
60a13213 368 struct scsi_cmnd *);
1da177e4 369static void ahd_linux_setup_tag_info_global(char *p);
73a25462 370static int aic79xx_setup(char *c);
85a46523
CH		 371
372static int ahd_linux_unit;
373
1da177e4
LT		 374
375/****************************** Inlines ***************************************/
1da177e4
LT		 376static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
377
1da177e4
LT		 378static __inline void
379ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
380{
73a25462 381 struct scsi_cmnd *cmd;
1da177e4
LT		 382 int direction;
383
384 cmd = scb->io_ctx;
be7db055 385 direction = cmd->sc_data_direction;
1da177e4
LT		 386 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
387 if (cmd->use_sg != 0) {
388 struct scatterlist *sg;
389
390 sg = (struct scatterlist *)cmd->request_buffer;
391 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
392 } else if (cmd->request_bufflen != 0) {
393 pci_unmap_single(ahd->dev_softc,
394 scb->platform_data->buf_busaddr,
395 cmd->request_bufflen, direction);
396 }
397}
398
399/******************************** Macros **************************************/
400#define BUILD_SCSIID(ahd, cmd) \
422c0d61 401 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
1da177e4 402
1da177e4
LT		 403/*
404 * Return a string describing the driver.
405 */
406static const char *
407ahd_linux_info(struct Scsi_Host *host)
408{
409 static char buffer[512];
410 char ahd_info[256];
411 char *bp;
412 struct ahd_softc *ahd;
413
414 bp = &buffer[0];
415 ahd = *(struct ahd_softc **)host->hostdata;
416 memset(bp, 0, sizeof(buffer));
417 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
418 strcat(bp, AIC79XX_DRIVER_VERSION);
419 strcat(bp, "\n");
420 strcat(bp, " <");
421 strcat(bp, ahd->description);
422 strcat(bp, ">\n");
423 strcat(bp, " ");
424 ahd_controller_info(ahd, ahd_info);
425 strcat(bp, ahd_info);
426 strcat(bp, "\n");
427
428 return (bp);
429}
430
431/*
432 * Queue an SCB to the controller.
433 */
434static int
73a25462 435ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
1da177e4
LT		 436{
437 struct ahd_softc *ahd;
73a25462 438 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
1da177e4
LT		 439
440 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
441
1da177e4
LT		 442 /*
443 * Close the race of a command that was in the process of
444 * being queued to us just as our simq was frozen. Let
445 * DV commands through so long as we are only frozen to
446 * perform DV.
447 */
73a25462 448 if (ahd->platform_data->qfrozen != 0) {
60a13213 449 printf("%s: queue frozen\n", ahd_name(ahd));
1da177e4 450
60a13213 451 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 452 }
60a13213
HR		 453
454 /*
455 * Save the callback on completion function.
456 */
457 cmd->scsi_done = scsi_done;
458
1da177e4 459 cmd->result = CAM_REQ_INPROG << 16;
60a13213
HR		 460
461 return ahd_linux_run_command(ahd, dev, cmd);
1da177e4
LT		 462}
463
73a25462
HR		 464static inline struct scsi_target **
465ahd_linux_target_in_softc(struct scsi_target *starget)
466{
467 struct ahd_softc *ahd =
468 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
469 unsigned int target_offset;
470
471 target_offset = starget->id;
472 if (starget->channel != 0)
473 target_offset += 8;
474
475 return &ahd->platform_data->starget[target_offset];
476}
477
1da177e4 478static int
73a25462 479ahd_linux_target_alloc(struct scsi_target *starget)
1da177e4 480{
73a25462
HR		 481 struct ahd_softc *ahd =
482 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
483 unsigned long flags;
484 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
485 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
486 struct ahd_devinfo devinfo;
487 struct ahd_initiator_tinfo *tinfo;
488 struct ahd_tmode_tstate *tstate;
489 char channel = starget->channel + 'A';
1da177e4 490
73a25462
HR		 491 ahd_lock(ahd, &flags);
492
493 BUG_ON(*ahd_targp != NULL);
494
495 *ahd_targp = starget;
496 memset(targ, 0, sizeof(*targ));
497
498 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
499 starget->id, &tstate);
500 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
501 CAM_LUN_WILDCARD, channel,
502 ROLE_INITIATOR);
503 spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
504 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
505 spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
506 else
507 spi_max_offset(starget) = MAX_OFFSET_PACED;
508 spi_max_width(starget) = ahd->features & AHD_WIDE;
509
510 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
511 AHD_TRANS_GOAL, /*paused*/FALSE);
512 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
513 AHD_TRANS_GOAL, /*paused*/FALSE);
514 ahd_unlock(ahd, &flags);
515
516 return 0;
517}
518
519static void
520ahd_linux_target_destroy(struct scsi_target *starget)
521{
522 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
523
524 *ahd_targp = NULL;
1da177e4
LT		 525}
526
527static int
73a25462 528ahd_linux_slave_alloc(struct scsi_device *sdev)
1da177e4 529{
73a25462
HR		 530 struct ahd_softc *ahd =
531 *((struct ahd_softc **)sdev->host->hostdata);
532 struct scsi_target *starget = sdev->sdev_target;
533 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
534 struct ahd_linux_device *dev;
1da177e4 535
1da177e4 536 if (bootverbose)
73a25462
HR		 537 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
538
539 BUG_ON(targ->sdev[sdev->lun] != NULL);
540
541 dev = scsi_transport_device_data(sdev);
542 memset(dev, 0, sizeof(*dev));
543
544 /*
545 * We start out life using untagged
546 * transactions of which we allow one.
547 */
548 dev->openings = 1;
549
1da177e4 550 /*
73a25462
HR		 551 * Set maxtags to 0. This will be changed if we
552 * later determine that we are dealing with
553 * a tagged queuing capable device.
1da177e4 554 */
73a25462
HR		 555 dev->maxtags = 0;
556
557 targ->sdev[sdev->lun] = sdev;
558
1da177e4
LT		 559 return (0);
560}
561
73a25462
HR		 562static int
563ahd_linux_slave_configure(struct scsi_device *sdev)
564{
565 struct ahd_softc *ahd;
566
567 ahd = *((struct ahd_softc **)sdev->host->hostdata);
568 if (bootverbose)
017560fc 569 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
73a25462
HR		 570
571 ahd_linux_device_queue_depth(sdev);
572
573 /* Initial Domain Validation */
574 if (!spi_initial_dv(sdev->sdev_target))
575 spi_dv_device(sdev);
576
577 return 0;
578}
579
1da177e4 580static void
73a25462 581ahd_linux_slave_destroy(struct scsi_device *sdev)
1da177e4
LT		 582{
583 struct ahd_softc *ahd;
73a25462
HR		 584 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
585 struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
1da177e4 586
73a25462 587 ahd = *((struct ahd_softc **)sdev->host->hostdata);
1da177e4 588 if (bootverbose)
73a25462
HR		 589 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
590
591 BUG_ON(dev->active);
592
593 targ->sdev[sdev->lun] = NULL;
1da177e4 594
1da177e4 595}
1da177e4
LT		 596
597#if defined(__i386__)
598/*
599 * Return the disk geometry for the given SCSI device.
600 */
601static int
1da177e4
LT		 602ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
603 sector_t capacity, int geom[])
604{
605 uint8_t *bh;
1da177e4
LT		 606 int heads;
607 int sectors;
608 int cylinders;
609 int ret;
610 int extended;
611 struct ahd_softc *ahd;
612
613 ahd = *((struct ahd_softc **)sdev->host->hostdata);
614
1da177e4 615 bh = scsi_bios_ptable(bdev);
1da177e4
LT		 616 if (bh) {
617 ret = scsi_partsize(bh, capacity,
618 &geom[2], &geom[0], &geom[1]);
1da177e4 619 kfree(bh);
1da177e4
LT		 620 if (ret != -1)
621 return (ret);
622 }
623 heads = 64;
624 sectors = 32;
625 cylinders = aic_sector_div(capacity, heads, sectors);
626
627 if (aic79xx_extended != 0)
628 extended = 1;
629 else
630 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
631 if (extended && cylinders >= 1024) {
632 heads = 255;
633 sectors = 63;
634 cylinders = aic_sector_div(capacity, heads, sectors);
635 }
636 geom[0] = heads;
637 geom[1] = sectors;
638 geom[2] = cylinders;
639 return (0);
640}
641#endif
642
643/*
644 * Abort the current SCSI command(s).
645 */
646static int
73a25462
HR		 647ahd_linux_abort(struct scsi_cmnd *cmd)
648{
649 int error;
650
651 error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
652 if (error != 0)
653 printf("aic79xx_abort returns 0x%x\n", error);
654 return error;
655}
656
657/*
658 * Attempt to send a target reset message to the device that timed out.
659 */
660static int
661ahd_linux_dev_reset(struct scsi_cmnd *cmd)
662{
663 int error;
664
665 error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
666 if (error != 0)
667 printf("aic79xx_dev_reset returns 0x%x\n", error);
668 return error;
669}
670
671/*
672 * Reset the SCSI bus.
673 */
674static int
675ahd_linux_bus_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 676{
677 struct ahd_softc *ahd;
1da177e4 678 u_long s;
73a25462 679 int found;
1da177e4 680
1da177e4 681 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
73a25462
HR		 682#ifdef AHD_DEBUG
683 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
684 printf("%s: Bus reset called for cmd %p\n",
685 ahd_name(ahd), cmd);
686#endif
687 ahd_lock(ahd, &s);
422c0d61 688 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
73a25462
HR		 689 /*initiate reset*/TRUE);
690 ahd_unlock(ahd, &s);
1da177e4 691
73a25462
HR		 692 if (bootverbose)
693 printf("%s: SCSI bus reset delivered. "
694 "%d SCBs aborted.\n", ahd_name(ahd), found);
1da177e4 695
73a25462
HR		 696 return (SUCCESS);
697}
1da177e4 698
73a25462
HR		 699struct scsi_host_template aic79xx_driver_template = {
700 .module = THIS_MODULE,
701 .name = "aic79xx",
85a46523 702 .proc_name = "aic79xx",
73a25462
HR		 703 .proc_info = ahd_linux_proc_info,
704 .info = ahd_linux_info,
705 .queuecommand = ahd_linux_queue,
706 .eh_abort_handler = ahd_linux_abort,
707 .eh_device_reset_handler = ahd_linux_dev_reset,
708 .eh_bus_reset_handler = ahd_linux_bus_reset,
709#if defined(__i386__)
710 .bios_param = ahd_linux_biosparam,
711#endif
712 .can_queue = AHD_MAX_QUEUE,
713 .this_id = -1,
714 .cmd_per_lun = 2,
715 .use_clustering = ENABLE_CLUSTERING,
716 .slave_alloc = ahd_linux_slave_alloc,
717 .slave_configure = ahd_linux_slave_configure,
718 .slave_destroy = ahd_linux_slave_destroy,
719 .target_alloc = ahd_linux_target_alloc,
720 .target_destroy = ahd_linux_target_destroy,
721};
1da177e4 722
73a25462
HR		 723/******************************** Bus DMA *************************************/
724int
725ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
726 bus_size_t alignment, bus_size_t boundary,
727 dma_addr_t lowaddr, dma_addr_t highaddr,
728 bus_dma_filter_t *filter, void *filterarg,
729 bus_size_t maxsize, int nsegments,
730 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
731{
732 bus_dma_tag_t dmat;
733
734 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
735 if (dmat == NULL)
736 return (ENOMEM);
1da177e4 737
1da177e4 738 /*
73a25462
HR		 739 * Linux is very simplistic about DMA memory. For now don't
740 * maintain all specification information. Once Linux supplies
741 * better facilities for doing these operations, or the
742 * needs of this particular driver change, we might need to do
743 * more here.
1da177e4 744 */
73a25462
HR		 745 dmat->alignment = alignment;
746 dmat->boundary = boundary;
747 dmat->maxsize = maxsize;
748 *ret_tag = dmat;
749 return (0);
750}
1da177e4 751
73a25462
HR		 752void
753ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
754{
755 free(dmat, M_DEVBUF);
756}
1da177e4 757
73a25462
HR		 758int
759ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
760 int flags, bus_dmamap_t *mapp)
761{
762 *vaddr = pci_alloc_consistent(ahd->dev_softc,
763 dmat->maxsize, mapp);
764 if (*vaddr == NULL)
765 return (ENOMEM);
766 return(0);
767}
1da177e4 768
73a25462
HR		 769void
770ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
771 void* vaddr, bus_dmamap_t map)
772{
773 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
774 vaddr, map);
775}
776
777int
778ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
779 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
780 void *cb_arg, int flags)
781{
1da177e4 782 /*
73a25462
HR		 783 * Assume for now that this will only be used during
784 * initialization and not for per-transaction buffer mapping.
1da177e4 785 */
73a25462 786 bus_dma_segment_t stack_sg;
1da177e4 787
73a25462
HR		 788 stack_sg.ds_addr = map;
789 stack_sg.ds_len = dmat->maxsize;
790 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
791 return (0);
792}
1da177e4 793
73a25462
HR		 794void
795ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
796{
797}
1da177e4 798
73a25462
HR		 799int
800ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
801{
802 /* Nothing to do */
803 return (0);
804}
1da177e4 805
73a25462
HR		 806/********************* Platform Dependent Functions ***************************/
807/*
808 * Compare "left hand" softc with "right hand" softc, returning:
809 * < 0 - lahd has a lower priority than rahd
810 * 0 - Softcs are equal
811 * > 0 - lahd has a higher priority than rahd
812 */
813int
814ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
815{
816 int value;
1da177e4
LT		 817
818 /*
73a25462
HR		 819 * Under Linux, cards are ordered as follows:
820 * 1) PCI devices that are marked as the boot controller.
821 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
822 * 3) All remaining PCI devices sorted by bus/slot/func.
1da177e4 823 */
73a25462
HR		 824#if 0
825 value = (lahd->flags & AHD_BOOT_CHANNEL)
826 - (rahd->flags & AHD_BOOT_CHANNEL);
827 if (value != 0)
828 /* Controllers set for boot have a *higher* priority */
829 return (value);
830#endif
1da177e4 831
73a25462
HR		 832 value = (lahd->flags & AHD_BIOS_ENABLED)
833 - (rahd->flags & AHD_BIOS_ENABLED);
834 if (value != 0)
835 /* Controllers with BIOS enabled have a *higher* priority */
836 return (value);
1da177e4 837
73a25462
HR		 838 /* Still equal. Sort by bus/slot/func. */
839 if (aic79xx_reverse_scan != 0)
840 value = ahd_get_pci_bus(lahd->dev_softc)
841 - ahd_get_pci_bus(rahd->dev_softc);
842 else
843 value = ahd_get_pci_bus(rahd->dev_softc)
844 - ahd_get_pci_bus(lahd->dev_softc);
845 if (value != 0)
846 return (value);
847 if (aic79xx_reverse_scan != 0)
848 value = ahd_get_pci_slot(lahd->dev_softc)
849 - ahd_get_pci_slot(rahd->dev_softc);
850 else
851 value = ahd_get_pci_slot(rahd->dev_softc)
852 - ahd_get_pci_slot(lahd->dev_softc);
853 if (value != 0)
854 return (value);
1da177e4 855
73a25462
HR		 856 value = rahd->channel - lahd->channel;
857 return (value);
858}
1da177e4 859
73a25462
HR		 860static void
861ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
862{
1da177e4 863
73a25462
HR		 864 if ((instance >= 0)
865 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
866 uint8_t *iocell_info;
867
868 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
869 iocell_info[index] = value & 0xFFFF;
870 if (bootverbose)
871 printf("iocell[%d:%ld] = %d\n", instance, index, value);
1da177e4 872 }
73a25462 873}
1da177e4 874
73a25462
HR		 875static void
876ahd_linux_setup_tag_info_global(char *p)
877{
878 int tags, i, j;
1da177e4 879
73a25462
HR		 880 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
881 printf("Setting Global Tags= %d\n", tags);
882
883 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
884 for (j = 0; j < AHD_NUM_TARGETS; j++) {
885 aic79xx_tag_info[i].tag_commands[j] = tags;
1da177e4 886 }
1da177e4 887 }
1da177e4
LT		 888}
889
1da177e4 890static void
73a25462 891ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1da177e4 892{
1da177e4 893
73a25462
HR		 894 if ((instance >= 0) && (targ >= 0)
895 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
896 && (targ < AHD_NUM_TARGETS)) {
897 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
898 if (bootverbose)
899 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1da177e4 900 }
1da177e4
LT		 901}
902
1ff92730
CH		 903static char *
904ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
905 void (*callback)(u_long, int, int, int32_t),
906 u_long callback_arg)
907{
908 char *tok_end;
909 char *tok_end2;
910 int i;
911 int instance;
912 int targ;
913 int done;
914 char tok_list[] = {'.', ',', '{', '}', '\0'};
915
916 /* All options use a ':' name/arg separator */
917 if (*opt_arg != ':')
918 return (opt_arg);
919 opt_arg++;
920 instance = -1;
921 targ = -1;
922 done = FALSE;
923 /*
924 * Restore separator that may be in
925 * the middle of our option argument.
926 */
927 tok_end = strchr(opt_arg, '\0');
928 if (tok_end < end)
929 *tok_end = ',';
930 while (!done) {
931 switch (*opt_arg) {
932 case '{':
933 if (instance == -1) {
934 instance = 0;
935 } else {
936 if (depth > 1) {
937 if (targ == -1)
938 targ = 0;
939 } else {
940 printf("Malformed Option %s\n",
941 opt_name);
942 done = TRUE;
943 }
944 }
945 opt_arg++;
946 break;
947 case '}':
948 if (targ != -1)
949 targ = -1;
950 else if (instance != -1)
951 instance = -1;
952 opt_arg++;
953 break;
954 case ',':
955 case '.':
956 if (instance == -1)
957 done = TRUE;
958 else if (targ >= 0)
959 targ++;
960 else if (instance >= 0)
961 instance++;
962 opt_arg++;
963 break;
964 case '\0':
965 done = TRUE;
966 break;
967 default:
968 tok_end = end;
969 for (i = 0; tok_list[i]; i++) {
970 tok_end2 = strchr(opt_arg, tok_list[i]);
971 if ((tok_end2) && (tok_end2 < tok_end))
972 tok_end = tok_end2;
973 }
974 callback(callback_arg, instance, targ,
975 simple_strtol(opt_arg, NULL, 0));
976 opt_arg = tok_end;
977 break;
978 }
979 }
980 return (opt_arg);
981}
982
1da177e4 983/*
73a25462
HR		 984 * Handle Linux boot parameters. This routine allows for assigning a value
985 * to a parameter with a ':' between the parameter and the value.
986 * ie. aic79xx=stpwlev:1,extended
1da177e4
LT		 987 */
988static int
73a25462 989aic79xx_setup(char *s)
1da177e4 990{
73a25462
HR		 991 int i, n;
992 char *p;
993 char *end;
1da177e4 994
73a25462
HR		 995 static struct {
996 const char *name;
997 uint32_t *flag;
998 } options[] = {
999 { "extended", &aic79xx_extended },
1000 { "no_reset", &aic79xx_no_reset },
1001 { "verbose", &aic79xx_verbose },
1002 { "allow_memio", &aic79xx_allow_memio},
1da177e4 1003#ifdef AHD_DEBUG
73a25462 1004 { "debug", &ahd_debug },
1da177e4 1005#endif
73a25462
HR		 1006 { "reverse_scan", &aic79xx_reverse_scan },
1007 { "periodic_otag", &aic79xx_periodic_otag },
1008 { "pci_parity", &aic79xx_pci_parity },
1009 { "seltime", &aic79xx_seltime },
1010 { "tag_info", NULL },
1011 { "global_tag_depth", NULL},
1012 { "slewrate", NULL },
1013 { "precomp", NULL },
1014 { "amplitude", NULL },
1015 };
1da177e4 1016
73a25462 1017 end = strchr(s, '\0');
1da177e4 1018
73a25462
HR		 1019 /*
1020 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1021 * will never be 0 in this case.
1022 */
1023 n = 0;
1024
1025 while ((p = strsep(&s, ",.")) != NULL) {
1026 if (*p == '\0')
1027 continue;
1028 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1029
1030 n = strlen(options[i].name);
1031 if (strncmp(options[i].name, p, n) == 0)
1032 break;
1033 }
1034 if (i == NUM_ELEMENTS(options))
1035 continue;
1036
1037 if (strncmp(p, "global_tag_depth", n) == 0) {
1038 ahd_linux_setup_tag_info_global(p + n);
1039 } else if (strncmp(p, "tag_info", n) == 0) {
1ff92730 1040 s = ahd_parse_brace_option("tag_info", p + n, end,
73a25462
HR		 1041 2, ahd_linux_setup_tag_info, 0);
1042 } else if (strncmp(p, "slewrate", n) == 0) {
1ff92730 1043 s = ahd_parse_brace_option("slewrate",
73a25462
HR		 1044 p + n, end, 1, ahd_linux_setup_iocell_info,
1045 AIC79XX_SLEWRATE_INDEX);
1046 } else if (strncmp(p, "precomp", n) == 0) {
1ff92730 1047 s = ahd_parse_brace_option("precomp",
73a25462
HR		 1048 p + n, end, 1, ahd_linux_setup_iocell_info,
1049 AIC79XX_PRECOMP_INDEX);
1050 } else if (strncmp(p, "amplitude", n) == 0) {
1ff92730 1051 s = ahd_parse_brace_option("amplitude",
73a25462
HR		 1052 p + n, end, 1, ahd_linux_setup_iocell_info,
1053 AIC79XX_AMPLITUDE_INDEX);
1054 } else if (p[n] == ':') {
1055 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1056 } else if (!strncmp(p, "verbose", n)) {
1057 *(options[i].flag) = 1;
1058 } else {
1059 *(options[i].flag) ^= 0xFFFFFFFF;
1060 }
1061 }
1062 return 1;
1da177e4
LT		 1063}
1064
73a25462
HR		 1065__setup("aic79xx=", aic79xx_setup);
1066
1067uint32_t aic79xx_verbose;
1da177e4 1068
1da177e4 1069int
73a25462 1070ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1da177e4 1071{
73a25462
HR		 1072 char buf[80];
1073 struct Scsi_Host *host;
1074 char *new_name;
1075 u_long s;
1da177e4 1076
73a25462
HR		 1077 template->name = ahd->description;
1078 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1079 if (host == NULL)
1da177e4
LT		 1080 return (ENOMEM);
1081
73a25462
HR		 1082 *((struct ahd_softc **)host->hostdata) = ahd;
1083 ahd_lock(ahd, &s);
1084 scsi_assign_lock(host, &ahd->platform_data->spin_lock);
1085 ahd->platform_data->host = host;
1086 host->can_queue = AHD_MAX_QUEUE;
1087 host->cmd_per_lun = 2;
1088 host->sg_tablesize = AHD_NSEG;
1089 host->this_id = ahd->our_id;
1090 host->irq = ahd->platform_data->irq;
1091 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1092 host->max_lun = AHD_NUM_LUNS;
1093 host->max_channel = 0;
1094 host->sg_tablesize = AHD_NSEG;
85a46523 1095 ahd_set_unit(ahd, ahd_linux_unit++);
73a25462
HR		 1096 sprintf(buf, "scsi%d", host->host_no);
1097 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1098 if (new_name != NULL) {
1099 strcpy(new_name, buf);
1100 ahd_set_name(ahd, new_name);
1101 }
1102 host->unique_id = ahd->unit;
1103 ahd_linux_initialize_scsi_bus(ahd);
1104 ahd_intr_enable(ahd, TRUE);
1105 ahd_unlock(ahd, &s);
1106
1107 host->transportt = ahd_linux_transport_template;
1108
1109 scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
1110 scsi_scan_host(host);
1da177e4
LT		 1111 return (0);
1112}
1113
73a25462
HR		 1114uint64_t
1115ahd_linux_get_memsize(void)
1da177e4 1116{
73a25462
HR		 1117 struct sysinfo si;
1118
1119 si_meminfo(&si);
1120 return ((uint64_t)si.totalram << PAGE_SHIFT);
1da177e4
LT		 1121}
1122
73a25462
HR		 1123/*
1124 * Place the SCSI bus into a known state by either resetting it,
1125 * or forcing transfer negotiations on the next command to any
1126 * target.
1127 */
1128static void
1129ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1da177e4 1130{
73a25462
HR		 1131 u_int target_id;
1132 u_int numtarg;
1da177e4 1133
73a25462
HR		 1134 target_id = 0;
1135 numtarg = 0;
1136
1137 if (aic79xx_no_reset != 0)
1138 ahd->flags &= ~AHD_RESET_BUS_A;
1139
1140 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1141 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1142 else
1143 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1da177e4 1144
1da177e4 1145 /*
73a25462
HR		 1146 * Force negotiation to async for all targets that
1147 * will not see an initial bus reset.
1da177e4 1148 */
73a25462
HR		 1149 for (; target_id < numtarg; target_id++) {
1150 struct ahd_devinfo devinfo;
1151 struct ahd_initiator_tinfo *tinfo;
1152 struct ahd_tmode_tstate *tstate;
1153
1154 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1155 target_id, &tstate);
1156 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1157 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1158 ahd_update_neg_request(ahd, &devinfo, tstate,
1159 tinfo, AHD_NEG_ALWAYS);
1160 }
1161 /* Give the bus some time to recover */
1162 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1163 ahd_freeze_simq(ahd);
1164 init_timer(&ahd->platform_data->reset_timer);
1165 ahd->platform_data->reset_timer.data = (u_long)ahd;
1166 ahd->platform_data->reset_timer.expires =
1167 jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
1168 ahd->platform_data->reset_timer.function =
1169 (ahd_linux_callback_t *)ahd_release_simq;
1170 add_timer(&ahd->platform_data->reset_timer);
1171 }
1da177e4
LT		 1172}
1173
1174int
73a25462 1175ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1da177e4 1176{
73a25462
HR		 1177 ahd->platform_data =
1178 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1179 if (ahd->platform_data == NULL)
1180 return (ENOMEM);
1181 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1182 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1183 ahd_lockinit(ahd);
1184 init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
1185 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1da177e4
LT		 1186 return (0);
1187}
1188
73a25462
HR		 1189void
1190ahd_platform_free(struct ahd_softc *ahd)
1da177e4 1191{
73a25462
HR		 1192 struct scsi_target *starget;
1193 int i, j;
1da177e4 1194
73a25462 1195 if (ahd->platform_data != NULL) {
73a25462
HR		 1196 /* destroy all of the device and target objects */
1197 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1198 starget = ahd->platform_data->starget[i];
1199 if (starget != NULL) {
1200 for (j = 0; j < AHD_NUM_LUNS; j++) {
1201 struct ahd_linux_target *targ =
1202 scsi_transport_target_data(starget);
1203 if (targ->sdev[j] == NULL)
1204 continue;
1205 targ->sdev[j] = NULL;
1206 }
1207 ahd->platform_data->starget[i] = NULL;
1208 }
1209 }
1da177e4 1210
73a25462
HR		 1211 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1212 free_irq(ahd->platform_data->irq, ahd);
1213 if (ahd->tags[0] == BUS_SPACE_PIO
1214 && ahd->bshs[0].ioport != 0)
1215 release_region(ahd->bshs[0].ioport, 256);
1216 if (ahd->tags[1] == BUS_SPACE_PIO
1217 && ahd->bshs[1].ioport != 0)
1218 release_region(ahd->bshs[1].ioport, 256);
1219 if (ahd->tags[0] == BUS_SPACE_MEMIO
1220 && ahd->bshs[0].maddr != NULL) {
1221 iounmap(ahd->bshs[0].maddr);
1222 release_mem_region(ahd->platform_data->mem_busaddr,
1223 0x1000);
1224 }
97af50f6
JB		 1225 if (ahd->platform_data->host)
1226 scsi_host_put(ahd->platform_data->host);
1227
73a25462
HR		 1228 free(ahd->platform_data, M_DEVBUF);
1229 }
1da177e4
LT		 1230}
1231
73a25462
HR		 1232void
1233ahd_platform_init(struct ahd_softc *ahd)
1da177e4 1234{
73a25462
HR		 1235 /*
1236 * Lookup and commit any modified IO Cell options.
1237 */
1238 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1239 struct ahd_linux_iocell_opts *iocell_opts;
1da177e4 1240
73a25462
HR		 1241 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1242 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1243 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1244 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1245 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1246 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1247 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1da177e4 1248 }
1da177e4 1249
1da177e4
LT		 1250}
1251
73a25462
HR		 1252void
1253ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1da177e4 1254{
73a25462
HR		 1255 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1256 SCB_GET_CHANNEL(ahd, scb),
1257 SCB_GET_LUN(scb), SCB_LIST_NULL,
1258 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1da177e4
LT		 1259}
1260
73a25462
HR		 1261void
1262ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1263 ahd_queue_alg alg)
1da177e4 1264{
73a25462
HR		 1265 struct scsi_target *starget;
1266 struct ahd_linux_target *targ;
1267 struct ahd_linux_device *dev;
1268 struct scsi_device *sdev;
1269 int was_queuing;
1270 int now_queuing;
1da177e4 1271
73a25462
HR		 1272 starget = ahd->platform_data->starget[devinfo->target];
1273 targ = scsi_transport_target_data(starget);
1274 BUG_ON(targ == NULL);
1275 sdev = targ->sdev[devinfo->lun];
1276 if (sdev == NULL)
1277 return;
1da177e4 1278
73a25462 1279 dev = scsi_transport_device_data(sdev);
1da177e4 1280
73a25462
HR		 1281 if (dev == NULL)
1282 return;
1283 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1284 switch (alg) {
1285 default:
1286 case AHD_QUEUE_NONE:
1287 now_queuing = 0;
1288 break;
1289 case AHD_QUEUE_BASIC:
1290 now_queuing = AHD_DEV_Q_BASIC;
1291 break;
1292 case AHD_QUEUE_TAGGED:
1293 now_queuing = AHD_DEV_Q_TAGGED;
1294 break;
1295 }
1296 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1297 && (was_queuing != now_queuing)
1298 && (dev->active != 0)) {
1299 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1300 dev->qfrozen++;
1da177e4 1301 }
1da177e4 1302
73a25462
HR		 1303 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1304 if (now_queuing) {
1305 u_int usertags;
1da177e4 1306
73a25462
HR		 1307 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1308 if (!was_queuing) {
1309 /*
1310 * Start out agressively and allow our
1311 * dynamic queue depth algorithm to take
1312 * care of the rest.
1313 */
1314 dev->maxtags = usertags;
1315 dev->openings = dev->maxtags - dev->active;
1da177e4 1316 }
73a25462
HR		 1317 if (dev->maxtags == 0) {
1318 /*
1319 * Queueing is disabled by the user.
1320 */
1321 dev->openings = 1;
1322 } else if (alg == AHD_QUEUE_TAGGED) {
1323 dev->flags |= AHD_DEV_Q_TAGGED;
1324 if (aic79xx_periodic_otag != 0)
1325 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1326 } else
1327 dev->flags |= AHD_DEV_Q_BASIC;
1328 } else {
1329 /* We can only have one opening. */
1330 dev->maxtags = 0;
1331 dev->openings = 1 - dev->active;
1da177e4 1332 }
1da177e4 1333
73a25462
HR		 1334 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1335 case AHD_DEV_Q_BASIC:
1336 scsi_adjust_queue_depth(sdev,
1337 MSG_SIMPLE_TASK,
1338 dev->openings + dev->active);
1339 break;
1340 case AHD_DEV_Q_TAGGED:
1341 scsi_adjust_queue_depth(sdev,
1342 MSG_ORDERED_TASK,
1343 dev->openings + dev->active);
1344 break;
1345 default:
1da177e4 1346 /*
73a25462
HR		 1347 * We allow the OS to queue 2 untagged transactions to
1348 * us at any time even though we can only execute them
1349 * serially on the controller/device. This should
1350 * remove some latency.
1da177e4 1351 */
73a25462
HR		 1352 scsi_adjust_queue_depth(sdev,
1353 /*NON-TAGGED*/0,
1354 /*queue depth*/2);
1355 break;
1da177e4 1356 }
1da177e4
LT		 1357}
1358
73a25462
HR		 1359int
1360ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1361 int lun, u_int tag, role_t role, uint32_t status)
1da177e4 1362{
73a25462 1363 return 0;
1da177e4
LT		 1364}
1365
73a25462
HR		 1366static u_int
1367ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1da177e4 1368{
73a25462
HR		 1369 static int warned_user;
1370 u_int tags;
1da177e4 1371
73a25462
HR		 1372 tags = 0;
1373 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1374 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
1375
1376 if (warned_user == 0) {
1377 printf(KERN_WARNING
1378"aic79xx: WARNING: Insufficient tag_info instances\n"
1379"aic79xx: for installed controllers. Using defaults\n"
1380"aic79xx: Please update the aic79xx_tag_info array in\n"
1381"aic79xx: the aic79xx_osm.c source file.\n");
1382 warned_user++;
1383 }
1384 tags = AHD_MAX_QUEUE;
1385 } else {
1386 adapter_tag_info_t *tag_info;
1387
1388 tag_info = &aic79xx_tag_info[ahd->unit];
1389 tags = tag_info->tag_commands[devinfo->target_offset];
1390 if (tags > AHD_MAX_QUEUE)
1391 tags = AHD_MAX_QUEUE;
1da177e4
LT		 1392 }
1393 }
73a25462 1394 return (tags);
1da177e4
LT		 1395}
1396
1397/*
73a25462 1398 * Determines the queue depth for a given device.
1da177e4
LT		 1399 */
1400static void
73a25462 1401ahd_linux_device_queue_depth(struct scsi_device *sdev)
1da177e4 1402{
73a25462
HR		 1403 struct ahd_devinfo devinfo;
1404 u_int tags;
1405 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1da177e4 1406
73a25462
HR		 1407 ahd_compile_devinfo(&devinfo,
1408 ahd->our_id,
1409 sdev->sdev_target->id, sdev->lun,
1410 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1411 ROLE_INITIATOR);
1412 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1413 if (tags != 0 && sdev->tagged_supported != 0) {
1da177e4 1414
73a25462
HR		 1415 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
1416 ahd_print_devinfo(ahd, &devinfo);
1417 printf("Tagged Queuing enabled. Depth %d\n", tags);
1418 } else {
1419 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
1420 }
1421}
1da177e4 1422
73a25462
HR		 1423static int
1424ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1425 struct scsi_cmnd *cmd)
1426{
1427 struct scb *scb;
1428 struct hardware_scb *hscb;
1429 struct ahd_initiator_tinfo *tinfo;
1430 struct ahd_tmode_tstate *tstate;
1431 u_int col_idx;
1432 uint16_t mask;
1da177e4
LT		 1433
1434 /*
73a25462 1435 * Get an scb to use.
1da177e4 1436 */
73a25462
HR		 1437 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1438 cmd->device->id, &tstate);
1439 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1440 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1441 col_idx = AHD_NEVER_COL_IDX;
1442 } else {
1443 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1444 cmd->device->lun);
1445 }
1446 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1447 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1448 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1449 }
1da177e4 1450
73a25462
HR		 1451 scb->io_ctx = cmd;
1452 scb->platform_data->dev = dev;
1453 hscb = scb->hscb;
1454 cmd->host_scribble = (char *)scb;
1da177e4 1455
73a25462
HR		 1456 /*
1457 * Fill out basics of the HSCB.
1458 */
1459 hscb->control = 0;
1460 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1461 hscb->lun = cmd->device->lun;
1462 scb->hscb->task_management = 0;
1463 mask = SCB_GET_TARGET_MASK(ahd, scb);
1da177e4 1464
73a25462
HR		 1465 if ((ahd->user_discenable & mask) != 0)
1466 hscb->control |= DISCENB;
1da177e4 1467
73a25462
HR		 1468 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1469 scb->flags |= SCB_PACKETIZED;
1da177e4 1470
73a25462
HR		 1471 if ((tstate->auto_negotiate & mask) != 0) {
1472 scb->flags |= SCB_AUTO_NEGOTIATE;
1473 scb->hscb->control |= MK_MESSAGE;
1474 }
1475
1476 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1477 int msg_bytes;
1478 uint8_t tag_msgs[2];
1479
1480 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1481 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1482 hscb->control |= tag_msgs[0];
1483 if (tag_msgs[0] == MSG_ORDERED_TASK)
1484 dev->commands_since_idle_or_otag = 0;
1485 } else
1486 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1487 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1488 hscb->control |= MSG_ORDERED_TASK;
1489 dev->commands_since_idle_or_otag = 0;
1490 } else {
1491 hscb->control |= MSG_SIMPLE_TASK;
1da177e4 1492 }
73a25462 1493 }
1da177e4 1494
73a25462
HR		 1495 hscb->cdb_len = cmd->cmd_len;
1496 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1497
1498 scb->platform_data->xfer_len = 0;
1499 ahd_set_residual(scb, 0);
1500 ahd_set_sense_residual(scb, 0);
1501 scb->sg_count = 0;
1502 if (cmd->use_sg != 0) {
1503 void *sg;
1504 struct scatterlist *cur_seg;
1505 u_int nseg;
1506 int dir;
1507
1508 cur_seg = (struct scatterlist *)cmd->request_buffer;
1509 dir = cmd->sc_data_direction;
1510 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1511 cmd->use_sg, dir);
1512 scb->platform_data->xfer_len = 0;
1513 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1514 dma_addr_t addr;
1515 bus_size_t len;
1516
1517 addr = sg_dma_address(cur_seg);
1518 len = sg_dma_len(cur_seg);
1519 scb->platform_data->xfer_len += len;
1520 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1521 /*last*/nseg == 1);
1da177e4 1522 }
73a25462
HR		 1523 } else if (cmd->request_bufflen != 0) {
1524 void *sg;
1525 dma_addr_t addr;
1526 int dir;
1527
1528 sg = scb->sg_list;
1529 dir = cmd->sc_data_direction;
1530 addr = pci_map_single(ahd->dev_softc,
1531 cmd->request_buffer,
1532 cmd->request_bufflen, dir);
1533 scb->platform_data->xfer_len = cmd->request_bufflen;
1534 scb->platform_data->buf_busaddr = addr;
1535 sg = ahd_sg_setup(ahd, scb, sg, addr,
1536 cmd->request_bufflen, /*last*/TRUE);
1da177e4 1537 }
73a25462
HR		 1538
1539 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1540 dev->openings--;
1541 dev->active++;
1542 dev->commands_issued++;
1543
1544 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1545 dev->commands_since_idle_or_otag++;
1546 scb->flags |= SCB_ACTIVE;
1547 ahd_queue_scb(ahd, scb);
1548
1549 return 0;
1da177e4
LT		 1550}
1551
73a25462
HR		 1552/*
1553 * SCSI controller interrupt handler.
1554 */
1555irqreturn_t
1556ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1da177e4 1557{
73a25462
HR		 1558 struct ahd_softc *ahd;
1559 u_long flags;
1560 int ours;
1da177e4 1561
73a25462
HR		 1562 ahd = (struct ahd_softc *) dev_id;
1563 ahd_lock(ahd, &flags);
1564 ours = ahd_intr(ahd);
1565 ahd_unlock(ahd, &flags);
1566 return IRQ_RETVAL(ours);
1da177e4
LT		 1567}
1568
1569void
73a25462 1570ahd_platform_flushwork(struct ahd_softc *ahd)
1da177e4 1571{
73a25462 1572
1da177e4
LT		 1573}
1574
1575void
73a25462
HR		 1576ahd_send_async(struct ahd_softc *ahd, char channel,
1577 u_int target, u_int lun, ac_code code, void *arg)
1da177e4 1578{
73a25462
HR		 1579 switch (code) {
1580 case AC_TRANSFER_NEG:
1581 {
1582 char buf[80];
1583 struct scsi_target *starget;
1584 struct ahd_linux_target *targ;
1585 struct info_str info;
1586 struct ahd_initiator_tinfo *tinfo;
1587 struct ahd_tmode_tstate *tstate;
1588 unsigned int target_ppr_options;
1da177e4 1589
73a25462
HR		 1590 BUG_ON(target == CAM_TARGET_WILDCARD);
1591
1592 info.buffer = buf;
1593 info.length = sizeof(buf);
1594 info.offset = 0;
1595 info.pos = 0;
1596 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1597 target, &tstate);
1598
1599 /*
1600 * Don't bother reporting results while
1601 * negotiations are still pending.
1602 */
1603 if (tinfo->curr.period != tinfo->goal.period
1604 || tinfo->curr.width != tinfo->goal.width
1605 || tinfo->curr.offset != tinfo->goal.offset
1606 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1607 if (bootverbose == 0)
1608 break;
1609
1610 /*
1611 * Don't bother reporting results that
1612 * are identical to those last reported.
1613 */
1614 starget = ahd->platform_data->starget[target];
fc789a93 1615 if (starget == NULL)
73a25462 1616 break;
fc789a93 1617 targ = scsi_transport_target_data(starget);
73a25462
HR		 1618
1619 target_ppr_options =
1620 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1621 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
3f40d7d6
JB		 1622 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1623 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1624 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1625 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
88ff29a4
JB		 1626 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1627 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
73a25462
HR		 1628
1629 if (tinfo->curr.period == spi_period(starget)
1630 && tinfo->curr.width == spi_width(starget)
1631 && tinfo->curr.offset == spi_offset(starget)
1632 && tinfo->curr.ppr_options == target_ppr_options)
1633 if (bootverbose == 0)
1634 break;
1635
1636 spi_period(starget) = tinfo->curr.period;
1637 spi_width(starget) = tinfo->curr.width;
1638 spi_offset(starget) = tinfo->curr.offset;
a4b53a11
HR		 1639 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1640 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1641 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
3f40d7d6
JB		 1642 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1643 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1644 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1645 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
88ff29a4 1646 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
73a25462 1647 spi_display_xfer_agreement(starget);
1da177e4 1648 break;
73a25462
HR		 1649 }
1650 case AC_SENT_BDR:
1651 {
1652 WARN_ON(lun != CAM_LUN_WILDCARD);
1653 scsi_report_device_reset(ahd->platform_data->host,
1654 channel - 'A', target);
1da177e4
LT		 1655 break;
1656 }
73a25462
HR		 1657 case AC_BUS_RESET:
1658 if (ahd->platform_data->host != NULL) {
1659 scsi_report_bus_reset(ahd->platform_data->host,
1660 channel - 'A');
1da177e4 1661 }
73a25462
HR		 1662 break;
1663 default:
1664 panic("ahd_send_async: Unexpected async event");
1665 }
1da177e4
LT		 1666}
1667
73a25462
HR		 1668/*
1669 * Calls the higher level scsi done function and frees the scb.
1670 */
1671void
1672ahd_done(struct ahd_softc *ahd, struct scb *scb)
1da177e4 1673{
73a25462
HR		 1674 struct scsi_cmnd *cmd;
1675 struct ahd_linux_device *dev;
1da177e4 1676
73a25462
HR		 1677 if ((scb->flags & SCB_ACTIVE) == 0) {
1678 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1679 ahd_dump_card_state(ahd);
1680 panic("Stopping for safety");
1da177e4 1681 }
73a25462
HR		 1682 LIST_REMOVE(scb, pending_links);
1683 cmd = scb->io_ctx;
1684 dev = scb->platform_data->dev;
1685 dev->active--;
1686 dev->openings++;
1687 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1688 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1689 dev->qfrozen--;
1690 }
1691 ahd_linux_unmap_scb(ahd, scb);
1da177e4
LT		 1692
1693 /*
73a25462
HR		 1694 * Guard against stale sense data.
1695 * The Linux mid-layer assumes that sense
1696 * was retrieved anytime the first byte of
1697 * the sense buffer looks "sane".
1da177e4 1698 */
73a25462
HR		 1699 cmd->sense_buffer[0] = 0;
1700 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1701 uint32_t amount_xferred;
1da177e4 1702
73a25462
HR		 1703 amount_xferred =
1704 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1705 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1da177e4 1706#ifdef AHD_DEBUG
73a25462
HR		 1707 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1708 ahd_print_path(ahd, scb);
1709 printf("Set CAM_UNCOR_PARITY\n");
1710 }
1da177e4 1711#endif
73a25462
HR		 1712 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1713#ifdef AHD_REPORT_UNDERFLOWS
1da177e4 1714 /*
73a25462
HR		 1715 * This code is disabled by default as some
1716 * clients of the SCSI system do not properly
1717 * initialize the underflow parameter. This
1718 * results in spurious termination of commands
1719 * that complete as expected (e.g. underflow is
1720 * allowed as command can return variable amounts
1721 * of data.
1da177e4 1722 */
73a25462
HR		 1723 } else if (amount_xferred < scb->io_ctx->underflow) {
1724 u_int i;
1da177e4 1725
73a25462
HR		 1726 ahd_print_path(ahd, scb);
1727 printf("CDB:");
1728 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1729 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1730 printf("\n");
1731 ahd_print_path(ahd, scb);
1732 printf("Saw underflow (%ld of %ld bytes). "
1733 "Treated as error\n",
1734 ahd_get_residual(scb),
1735 ahd_get_transfer_length(scb));
1736 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1737#endif
1738 } else {
1739 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1da177e4 1740 }
73a25462
HR		 1741 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1742 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1743 }
1da177e4 1744
73a25462
HR		 1745 if (dev->openings == 1
1746 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1747 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1748 dev->tag_success_count++;
1749 /*
1750 * Some devices deal with temporary internal resource
1751 * shortages by returning queue full. When the queue
1752 * full occurrs, we throttle back. Slowly try to get
1753 * back to our previous queue depth.
1754 */
1755 if ((dev->openings + dev->active) < dev->maxtags
1756 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1757 dev->tag_success_count = 0;
1758 dev->openings++;
1759 }
1da177e4 1760
73a25462
HR		 1761 if (dev->active == 0)
1762 dev->commands_since_idle_or_otag = 0;
1da177e4 1763
73a25462
HR		 1764 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1765 printf("Recovery SCB completes\n");
1766 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1767 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1768 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1769 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
1770 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
1771 up(&ahd->platform_data->eh_sem);
1772 }
1da177e4 1773 }
73a25462
HR		 1774
1775 ahd_free_scb(ahd, scb);
1776 ahd_linux_queue_cmd_complete(ahd, cmd);
1da177e4
LT		 1777}
1778
1779static void
73a25462
HR		 1780ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1781 struct scsi_device *sdev, struct scb *scb)
1da177e4 1782{
73a25462
HR		 1783 struct ahd_devinfo devinfo;
1784 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1da177e4 1785
73a25462
HR		 1786 ahd_compile_devinfo(&devinfo,
1787 ahd->our_id,
1788 sdev->sdev_target->id, sdev->lun,
1789 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1790 ROLE_INITIATOR);
1791
1792 /*
1793 * We don't currently trust the mid-layer to
1794 * properly deal with queue full or busy. So,
1795 * when one occurs, we tell the mid-layer to
1796 * unconditionally requeue the command to us
1797 * so that we can retry it ourselves. We also
1798 * implement our own throttling mechanism so
1799 * we don't clobber the device with too many
1800 * commands.
1801 */
1802 switch (ahd_get_scsi_status(scb)) {
1803 default:
1804 break;
1805 case SCSI_STATUS_CHECK_COND:
1806 case SCSI_STATUS_CMD_TERMINATED:
1807 {
1808 struct scsi_cmnd *cmd;
1da177e4
LT		 1809
1810 /*
73a25462
HR		 1811 * Copy sense information to the OS's cmd
1812 * structure if it is available.
1da177e4 1813 */
73a25462
HR		 1814 cmd = scb->io_ctx;
1815 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1816 struct scsi_status_iu_header *siu;
1817 u_int sense_size;
1818 u_int sense_offset;
1da177e4 1819
73a25462
HR		 1820 if (scb->flags & SCB_SENSE) {
1821 sense_size = MIN(sizeof(struct scsi_sense_data)
1822 - ahd_get_sense_residual(scb),
1823 sizeof(cmd->sense_buffer));
1824 sense_offset = 0;
1825 } else {
1826 /*
1827 * Copy only the sense data into the provided
1828 * buffer.
1829 */
1830 siu = (struct scsi_status_iu_header *)
1831 scb->sense_data;
1832 sense_size = MIN(scsi_4btoul(siu->sense_length),
1833 sizeof(cmd->sense_buffer));
1834 sense_offset = SIU_SENSE_OFFSET(siu);
1835 }
1da177e4 1836
73a25462
HR		 1837 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1838 memcpy(cmd->sense_buffer,
1839 ahd_get_sense_buf(ahd, scb)
1840 + sense_offset, sense_size);
1841 cmd->result |= (DRIVER_SENSE << 24);
1da177e4 1842
1da177e4 1843#ifdef AHD_DEBUG
73a25462
HR		 1844 if (ahd_debug & AHD_SHOW_SENSE) {
1845 int i;
1da177e4 1846
73a25462
HR		 1847 printf("Copied %d bytes of sense data at %d:",
1848 sense_size, sense_offset);
1849 for (i = 0; i < sense_size; i++) {
1da177e4 1850 if ((i & 0xF) == 0)
73a25462
HR		 1851 printf("\n");
1852 printf("0x%x ", cmd->sense_buffer[i]);
1da177e4
LT		 1853 }
1854 printf("\n");
1855 }
1856#endif
1da177e4
LT		 1857 }
1858 break;
73a25462
HR		 1859 }
1860 case SCSI_STATUS_QUEUE_FULL:
1861 /*
1862 * By the time the core driver has returned this
1863 * command, all other commands that were queued
1864 * to us but not the device have been returned.
1865 * This ensures that dev->active is equal to
1866 * the number of commands actually queued to
1867 * the device.
1868 */
1869 dev->tag_success_count = 0;
1870 if (dev->active != 0) {
1da177e4 1871 /*
73a25462
HR		 1872 * Drop our opening count to the number
1873 * of commands currently outstanding.
1da177e4 1874 */
73a25462 1875 dev->openings = 0;
1da177e4 1876#ifdef AHD_DEBUG
73a25462
HR		 1877 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1878 ahd_print_path(ahd, scb);
1879 printf("Dropping tag count to %d\n",
1880 dev->active);
1da177e4
LT		 1881 }
1882#endif
73a25462 1883 if (dev->active == dev->tags_on_last_queuefull) {
1da177e4 1884
73a25462 1885 dev->last_queuefull_same_count++;
1da177e4 1886 /*
73a25462
HR		 1887 * If we repeatedly see a queue full
1888 * at the same queue depth, this
1889 * device has a fixed number of tag
1890 * slots. Lock in this tag depth
1891 * so we stop seeing queue fulls from
1892 * this device.
1da177e4 1893 */
73a25462
HR		 1894 if (dev->last_queuefull_same_count
1895 == AHD_LOCK_TAGS_COUNT) {
1896 dev->maxtags = dev->active;
1897 ahd_print_path(ahd, scb);
1898 printf("Locking max tag count at %d\n",
1899 dev->active);
1da177e4 1900 }
73a25462
HR		 1901 } else {
1902 dev->tags_on_last_queuefull = dev->active;
1903 dev->last_queuefull_same_count = 0;
1da177e4 1904 }
73a25462
HR		 1905 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1906 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1907 ahd_platform_set_tags(ahd, &devinfo,
1908 (dev->flags & AHD_DEV_Q_BASIC)
1909 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1da177e4
LT		 1910 break;
1911 }
1da177e4 1912 /*
73a25462
HR		 1913 * Drop down to a single opening, and treat this
1914 * as if the target returned BUSY SCSI status.
1da177e4 1915 */
73a25462
HR		 1916 dev->openings = 1;
1917 ahd_platform_set_tags(ahd, &devinfo,
1918 (dev->flags & AHD_DEV_Q_BASIC)
1919 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1920 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1921 }
1da177e4
LT		 1922}
1923
73a25462
HR		 1924static void
1925ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1da177e4 1926{
1da177e4 1927 /*
73a25462
HR		 1928 * Map CAM error codes into Linux Error codes. We
1929 * avoid the conversion so that the DV code has the
1930 * full error information available when making
1931 * state change decisions.
1da177e4 1932 */
73a25462
HR		 1933 {
1934 uint32_t status;
1935 u_int new_status;
1da177e4 1936
73a25462
HR		 1937 status = ahd_cmd_get_transaction_status(cmd);
1938 switch (status) {
1939 case CAM_REQ_INPROG:
1940 case CAM_REQ_CMP:
1941 case CAM_SCSI_STATUS_ERROR:
1942 new_status = DID_OK;
1943 break;
1944 case CAM_REQ_ABORTED:
1945 new_status = DID_ABORT;
1946 break;
1947 case CAM_BUSY:
1948 new_status = DID_BUS_BUSY;
1949 break;
1950 case CAM_REQ_INVALID:
1951 case CAM_PATH_INVALID:
1952 new_status = DID_BAD_TARGET;
1953 break;
1954 case CAM_SEL_TIMEOUT:
1955 new_status = DID_NO_CONNECT;
1956 break;
1957 case CAM_SCSI_BUS_RESET:
1958 case CAM_BDR_SENT:
1959 new_status = DID_RESET;
1960 break;
1961 case CAM_UNCOR_PARITY:
1962 new_status = DID_PARITY;
1963 break;
1964 case CAM_CMD_TIMEOUT:
1965 new_status = DID_TIME_OUT;
1966 break;
1967 case CAM_UA_ABORT:
1968 case CAM_REQ_CMP_ERR:
1969 case CAM_AUTOSENSE_FAIL:
1970 case CAM_NO_HBA:
1971 case CAM_DATA_RUN_ERR:
1972 case CAM_UNEXP_BUSFREE:
1973 case CAM_SEQUENCE_FAIL:
1974 case CAM_CCB_LEN_ERR:
1975 case CAM_PROVIDE_FAIL:
1976 case CAM_REQ_TERMIO:
1977 case CAM_UNREC_HBA_ERROR:
1978 case CAM_REQ_TOO_BIG:
1979 new_status = DID_ERROR;
1980 break;
1981 case CAM_REQUEUE_REQ:
1982 new_status = DID_REQUEUE;
1983 break;
1984 default:
1985 /* We should never get here */
1986 new_status = DID_ERROR;
1987 break;
1988 }
1989
1990 ahd_cmd_set_transaction_status(cmd, new_status);
1991 }
1992
1993 cmd->scsi_done(cmd);
1da177e4
LT		 1994}
1995
1996static void
73a25462 1997ahd_linux_sem_timeout(u_long arg)
1da177e4 1998{
73a25462
HR		 1999 struct ahd_softc *ahd;
2000 u_long s;
1da177e4 2001
73a25462
HR		 2002 ahd = (struct ahd_softc *)arg;
2003
2004 ahd_lock(ahd, &s);
2005 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
2006 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
2007 up(&ahd->platform_data->eh_sem);
2008 }
2009 ahd_unlock(ahd, &s);
1da177e4
LT		 2010}
2011
2012void
73a25462 2013ahd_freeze_simq(struct ahd_softc *ahd)
1da177e4 2014{
73a25462
HR		 2015 ahd->platform_data->qfrozen++;
2016 if (ahd->platform_data->qfrozen == 1) {
2017 scsi_block_requests(ahd->platform_data->host);
2018 ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2019 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2020 ROLE_INITIATOR, CAM_REQUEUE_REQ);
1da177e4 2021 }
1da177e4
LT		 2022}
2023
1da177e4 2024void
73a25462 2025ahd_release_simq(struct ahd_softc *ahd)
1da177e4 2026{
73a25462
HR		 2027 u_long s;
2028 int unblock_reqs;
1da177e4 2029
73a25462
HR		 2030 unblock_reqs = 0;
2031 ahd_lock(ahd, &s);
2032 if (ahd->platform_data->qfrozen > 0)
2033 ahd->platform_data->qfrozen--;
2034 if (ahd->platform_data->qfrozen == 0) {
2035 unblock_reqs = 1;
1da177e4 2036 }
73a25462 2037 ahd_unlock(ahd, &s);
1da177e4 2038 /*
73a25462
HR		 2039 * There is still a race here. The mid-layer
2040 * should keep its own freeze count and use
2041 * a bottom half handler to run the queues
2042 * so we can unblock with our own lock held.
1da177e4 2043 */
73a25462
HR		 2044 if (unblock_reqs)
2045 scsi_unblock_requests(ahd->platform_data->host);
2046}
1da177e4 2047
73a25462
HR		 2048static int
2049ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2050{
2051 struct ahd_softc *ahd;
2052 struct ahd_linux_device *dev;
2053 struct scb *pending_scb;
2054 u_int saved_scbptr;
2055 u_int active_scbptr;
2056 u_int last_phase;
2057 u_int saved_scsiid;
2058 u_int cdb_byte;
2059 int retval;
2060 int was_paused;
2061 int paused;
2062 int wait;
2063 int disconnected;
2064 ahd_mode_state saved_modes;
2065
2066 pending_scb = NULL;
2067 paused = FALSE;
2068 wait = FALSE;
2069 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2070
017560fc
JG		 2071 scmd_printk(KERN_INFO, cmd,
2072 "Attempting to queue a%s message:",
73a25462
HR		 2073 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2074
2075 printf("CDB:");
2076 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2077 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2078 printf("\n");
2079
2080 spin_lock_irq(&ahd->platform_data->spin_lock);
1da177e4 2081
1da177e4 2082 /*
73a25462
HR		 2083 * First determine if we currently own this command.
2084 * Start by searching the device queue. If not found
2085 * there, check the pending_scb list. If not found
2086 * at all, and the system wanted us to just abort the
2087 * command, return success.
1da177e4 2088 */
73a25462
HR		 2089 dev = scsi_transport_device_data(cmd->device);
2090
2091 if (dev == NULL) {
2092 /*
2093 * No target device for this command exists,
2094 * so we must not still own the command.
2095 */
017560fc 2096 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
73a25462
HR		 2097 retval = SUCCESS;
2098 goto no_cmd;
2099 }
1da177e4 2100
1da177e4 2101 /*
73a25462 2102 * See if we can find a matching cmd in the pending list.
1da177e4 2103 */
73a25462
HR		 2104 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2105 if (pending_scb->io_ctx == cmd)
2106 break;
1da177e4
LT		 2107 }
2108
73a25462 2109 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
1da177e4 2110
73a25462
HR		 2111 /* Any SCB for this device will do for a target reset */
2112 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
422c0d61
JG		 2113 if (ahd_match_scb(ahd, pending_scb,
2114 scmd_id(cmd),
2115 scmd_channel(cmd) + 'A',
73a25462
HR		 2116 CAM_LUN_WILDCARD,
2117 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2118 break;
1da177e4
LT		 2119 }
2120 }
2121
73a25462 2122 if (pending_scb == NULL) {
017560fc 2123 scmd_printk(KERN_INFO, cmd, "Command not found\n");
73a25462 2124 goto no_cmd;
1da177e4 2125 }
1da177e4 2126
73a25462
HR		 2127 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2128 /*
2129 * We can't queue two recovery actions using the same SCB
2130 */
2131 retval = FAILED;
2132 goto done;
2133 }
1da177e4 2134
1da177e4 2135 /*
73a25462
HR		 2136 * Ensure that the card doesn't do anything
2137 * behind our back. Also make sure that we
2138 * didn't "just" miss an interrupt that would
2139 * affect this cmd.
1da177e4 2140 */
73a25462
HR		 2141 was_paused = ahd_is_paused(ahd);
2142 ahd_pause_and_flushwork(ahd);
2143 paused = TRUE;
1da177e4 2144
73a25462 2145 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
017560fc 2146 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
73a25462
HR		 2147 goto no_cmd;
2148 }
1da177e4 2149
73a25462
HR		 2150 printf("%s: At time of recovery, card was %spaused\n",
2151 ahd_name(ahd), was_paused ? "" : "not ");
2152 ahd_dump_card_state(ahd);
1da177e4 2153
73a25462
HR		 2154 disconnected = TRUE;
2155 if (flag == SCB_ABORT) {
2156 if (ahd_search_qinfifo(ahd, cmd->device->id,
2157 cmd->device->channel + 'A',
2158 cmd->device->lun,
2159 pending_scb->hscb->tag,
2160 ROLE_INITIATOR, CAM_REQ_ABORTED,
2161 SEARCH_COMPLETE) > 0) {
2162 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2163 ahd_name(ahd), cmd->device->channel,
2164 cmd->device->id, cmd->device->lun);
2165 retval = SUCCESS;
2166 goto done;
2167 }
2168 } else if (ahd_search_qinfifo(ahd, cmd->device->id,
2169 cmd->device->channel + 'A',
2170 cmd->device->lun, pending_scb->hscb->tag,
2171 ROLE_INITIATOR, /*status*/0,
2172 SEARCH_COUNT) > 0) {
2173 disconnected = FALSE;
2174 }
1da177e4 2175
73a25462
HR		 2176 saved_modes = ahd_save_modes(ahd);
2177 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2178 last_phase = ahd_inb(ahd, LASTPHASE);
2179 saved_scbptr = ahd_get_scbptr(ahd);
2180 active_scbptr = saved_scbptr;
2181 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2182 struct scb *bus_scb;
1da177e4 2183
73a25462
HR		 2184 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2185 if (bus_scb == pending_scb)
2186 disconnected = FALSE;
2187 else if (flag != SCB_ABORT
2188 && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
2189 && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2190 disconnected = FALSE;
1da177e4 2191 }
73a25462
HR		 2192
2193 /*
2194 * At this point, pending_scb is the scb associated with the
2195 * passed in command. That command is currently active on the
2196 * bus or is in the disconnected state.
2197 */
2198 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2199 if (last_phase != P_BUSFREE
2200 && (SCB_GET_TAG(pending_scb) == active_scbptr
2201 || (flag == SCB_DEVICE_RESET
422c0d61 2202 && SCSIID_TARGET(ahd, saved_scsiid) == scmd_id(cmd)))) {
73a25462 2203
1da177e4 2204 /*
73a25462
HR		 2205 * We're active on the bus, so assert ATN
2206 * and hope that the target responds.
1da177e4 2207 */
73a25462
HR		 2208 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2209 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2210 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2211 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
017560fc 2212 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
73a25462
HR		 2213 wait = TRUE;
2214 } else if (disconnected) {
2215
2216 /*
2217 * Actually re-queue this SCB in an attempt
2218 * to select the device before it reconnects.
2219 */
2220 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2221 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2222 pending_scb->hscb->cdb_len = 0;
2223 pending_scb->hscb->task_attribute = 0;
2224 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2225
2226 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
1da177e4 2227 /*
73a25462
HR		 2228 * Mark the SCB has having an outstanding
2229 * task management function. Should the command
2230 * complete normally before the task management
2231 * function can be sent, the host will be notified
2232 * to abort our requeued SCB.
1da177e4 2233 */
73a25462
HR		 2234 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2235 pending_scb->hscb->task_management);
2236 } else {
2237 /*
2238 * If non-packetized, set the MK_MESSAGE control
2239 * bit indicating that we desire to send a message.
2240 * We also set the disconnected flag since there is
2241 * no guarantee that our SCB control byte matches
2242 * the version on the card. We don't want the
2243 * sequencer to abort the command thinking an
2244 * unsolicited reselection occurred.
2245 */
2246 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2247
2248 /*
2249 * The sequencer will never re-reference the
2250 * in-core SCB. To make sure we are notified
2251 * during reslection, set the MK_MESSAGE flag in
2252 * the card's copy of the SCB.
2253 */
2254 ahd_outb(ahd, SCB_CONTROL,
2255 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
1da177e4 2256 }
73a25462 2257
1da177e4 2258 /*
73a25462
HR		 2259 * Clear out any entries in the QINFIFO first
2260 * so we are the next SCB for this target
2261 * to run.
1da177e4 2262 */
73a25462
HR		 2263 ahd_search_qinfifo(ahd, cmd->device->id,
2264 cmd->device->channel + 'A', cmd->device->lun,
2265 SCB_LIST_NULL, ROLE_INITIATOR,
2266 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2267 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2268 ahd_set_scbptr(ahd, saved_scbptr);
2269 ahd_print_path(ahd, pending_scb);
2270 printf("Device is disconnected, re-queuing SCB\n");
2271 wait = TRUE;
2272 } else {
017560fc 2273 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
73a25462
HR		 2274 retval = FAILED;
2275 goto done;
1da177e4 2276 }
1da177e4 2277
73a25462 2278no_cmd:
1da177e4 2279 /*
73a25462
HR		 2280 * Our assumption is that if we don't have the command, no
2281 * recovery action was required, so we return success. Again,
2282 * the semantics of the mid-layer recovery engine are not
2283 * well defined, so this may change in time.
1da177e4 2284 */
73a25462
HR		 2285 retval = SUCCESS;
2286done:
2287 if (paused)
2288 ahd_unpause(ahd);
2289 if (wait) {
2290 struct timer_list timer;
2291 int ret;
1da177e4 2292
73a25462
HR		 2293 ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM;
2294 spin_unlock_irq(&ahd->platform_data->spin_lock);
2295 init_timer(&timer);
2296 timer.data = (u_long)ahd;
2297 timer.expires = jiffies + (5 * HZ);
2298 timer.function = ahd_linux_sem_timeout;
2299 add_timer(&timer);
2300 printf("Recovery code sleeping\n");
2301 down(&ahd->platform_data->eh_sem);
2302 printf("Recovery code awake\n");
2303 ret = del_timer_sync(&timer);
2304 if (ret == 0) {
2305 printf("Timer Expired\n");
2306 retval = FAILED;
1da177e4 2307 }
73a25462 2308 spin_lock_irq(&ahd->platform_data->spin_lock);
1da177e4 2309 }
73a25462
HR		 2310 spin_unlock_irq(&ahd->platform_data->spin_lock);
2311 return (retval);
1da177e4
LT		 2312}
2313
73a25462 2314static void ahd_linux_set_width(struct scsi_target *starget, int width)
1da177e4 2315{
73a25462
HR		 2316 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2317 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2318 struct ahd_devinfo devinfo;
2319 unsigned long flags;
1da177e4 2320
73a25462
HR		 2321 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2322 starget->channel + 'A', ROLE_INITIATOR);
2323 ahd_lock(ahd, &flags);
2324 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2325 ahd_unlock(ahd, &flags);
2326}
2327
2328static void ahd_linux_set_period(struct scsi_target *starget, int period)
2329{
2330 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2331 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2332 struct ahd_tmode_tstate *tstate;
2333 struct ahd_initiator_tinfo *tinfo
2334 = ahd_fetch_transinfo(ahd,
2335 starget->channel + 'A',
2336 shost->this_id, starget->id, &tstate);
2337 struct ahd_devinfo devinfo;
2338 unsigned int ppr_options = tinfo->goal.ppr_options;
a4b53a11 2339 unsigned int dt;
73a25462
HR		 2340 unsigned long flags;
2341 unsigned long offset = tinfo->goal.offset;
1da177e4 2342
a4b53a11
HR		 2343#ifdef AHD_DEBUG
2344 if ((ahd_debug & AHD_SHOW_DV) != 0)
2345 printf("%s: set period to %d\n", ahd_name(ahd), period);
2346#endif
73a25462
HR		 2347 if (offset == 0)
2348 offset = MAX_OFFSET;
1da177e4 2349
73a25462
HR		 2350 if (period < 8)
2351 period = 8;
2352 if (period < 10) {
2353 ppr_options |= MSG_EXT_PPR_DT_REQ;
2354 if (period == 8)
2355 ppr_options |= MSG_EXT_PPR_IU_REQ;
1da177e4
LT		 2356 }
2357
a4b53a11
HR		 2358 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2359
73a25462
HR		 2360 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2361 starget->channel + 'A', ROLE_INITIATOR);
1da177e4 2362
73a25462
HR		 2363 /* all PPR requests apart from QAS require wide transfers */
2364 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2365 if (spi_width(starget) == 0)
2366 ppr_options &= MSG_EXT_PPR_QAS_REQ;
1da177e4 2367 }
73a25462 2368
a4b53a11
HR		 2369 ahd_find_syncrate(ahd, &period, &ppr_options,
2370 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2371
73a25462
HR		 2372 ahd_lock(ahd, &flags);
2373 ahd_set_syncrate(ahd, &devinfo, period, offset,
2374 ppr_options, AHD_TRANS_GOAL, FALSE);
2375 ahd_unlock(ahd, &flags);
1da177e4
LT		 2376}
2377
73a25462 2378static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
1da177e4 2379{
73a25462
HR		 2380 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2381 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2382 struct ahd_tmode_tstate *tstate;
2383 struct ahd_initiator_tinfo *tinfo
2384 = ahd_fetch_transinfo(ahd,
2385 starget->channel + 'A',
2386 shost->this_id, starget->id, &tstate);
2387 struct ahd_devinfo devinfo;
2388 unsigned int ppr_options = 0;
2389 unsigned int period = 0;
a4b53a11 2390 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2391 unsigned long flags;
2392
a4b53a11
HR		 2393#ifdef AHD_DEBUG
2394 if ((ahd_debug & AHD_SHOW_DV) != 0)
2395 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2396#endif
2397
73a25462
HR		 2398 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2399 starget->channel + 'A', ROLE_INITIATOR);
2400 if (offset != 0) {
2401 period = tinfo->goal.period;
2402 ppr_options = tinfo->goal.ppr_options;
a4b53a11
HR		 2403 ahd_find_syncrate(ahd, &period, &ppr_options,
2404 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
1da177e4 2405 }
a4b53a11 2406
73a25462
HR		 2407 ahd_lock(ahd, &flags);
2408 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2409 AHD_TRANS_GOAL, FALSE);
2410 ahd_unlock(ahd, &flags);
1da177e4
LT		 2411}
2412
73a25462 2413static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
1da177e4 2414{
73a25462
HR		 2415 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2416 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2417 struct ahd_tmode_tstate *tstate;
2418 struct ahd_initiator_tinfo *tinfo
2419 = ahd_fetch_transinfo(ahd,
2420 starget->channel + 'A',
2421 shost->this_id, starget->id, &tstate);
2422 struct ahd_devinfo devinfo;
2423 unsigned int ppr_options = tinfo->goal.ppr_options
2424 & ~MSG_EXT_PPR_DT_REQ;
2425 unsigned int period = tinfo->goal.period;
52b5cfb3 2426 unsigned int width = tinfo->goal.width;
73a25462
HR		 2427 unsigned long flags;
2428
a4b53a11
HR		 2429#ifdef AHD_DEBUG
2430 if ((ahd_debug & AHD_SHOW_DV) != 0)
2431 printf("%s: %s DT\n", ahd_name(ahd),
2432 dt ? "enabling" : "disabling");
2433#endif
73a25462
HR		 2434 if (dt) {
2435 ppr_options |= MSG_EXT_PPR_DT_REQ;
52b5cfb3
HR		 2436 if (!width)
2437 ahd_linux_set_width(starget, 1);
a4b53a11
HR		 2438 } else {
2439 if (period <= 9)
2440 period = 10; /* If resetting DT, period must be >= 25ns */
2441 /* IU is invalid without DT set */
2442 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2443 }
73a25462
HR		 2444 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2445 starget->channel + 'A', ROLE_INITIATOR);
2446 ahd_find_syncrate(ahd, &period, &ppr_options,
2447 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2448
73a25462
HR		 2449 ahd_lock(ahd, &flags);
2450 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2451 ppr_options, AHD_TRANS_GOAL, FALSE);
2452 ahd_unlock(ahd, &flags);
1da177e4
LT		 2453}
2454
73a25462 2455static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
1da177e4 2456{
73a25462
HR		 2457 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2458 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2459 struct ahd_tmode_tstate *tstate;
2460 struct ahd_initiator_tinfo *tinfo
2461 = ahd_fetch_transinfo(ahd,
2462 starget->channel + 'A',
2463 shost->this_id, starget->id, &tstate);
2464 struct ahd_devinfo devinfo;
2465 unsigned int ppr_options = tinfo->goal.ppr_options
2466 & ~MSG_EXT_PPR_QAS_REQ;
2467 unsigned int period = tinfo->goal.period;
a4b53a11 2468 unsigned int dt;
73a25462
HR		 2469 unsigned long flags;
2470
a4b53a11
HR		 2471#ifdef AHD_DEBUG
2472 if ((ahd_debug & AHD_SHOW_DV) != 0)
2473 printf("%s: %s QAS\n", ahd_name(ahd),
2474 qas ? "enabling" : "disabling");
2475#endif
2476
2477 if (qas) {
2478 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2479 }
2480
2481 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2482
2483 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2484 starget->channel + 'A', ROLE_INITIATOR);
2485 ahd_find_syncrate(ahd, &period, &ppr_options,
2486 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2487
73a25462
HR		 2488 ahd_lock(ahd, &flags);
2489 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2490 ppr_options, AHD_TRANS_GOAL, FALSE);
2491 ahd_unlock(ahd, &flags);
1da177e4
LT		 2492}
2493
73a25462 2494static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
1da177e4 2495{
73a25462
HR		 2496 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2497 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2498 struct ahd_tmode_tstate *tstate;
2499 struct ahd_initiator_tinfo *tinfo
2500 = ahd_fetch_transinfo(ahd,
2501 starget->channel + 'A',
2502 shost->this_id, starget->id, &tstate);
2503 struct ahd_devinfo devinfo;
2504 unsigned int ppr_options = tinfo->goal.ppr_options
2505 & ~MSG_EXT_PPR_IU_REQ;
2506 unsigned int period = tinfo->goal.period;
a4b53a11 2507 unsigned int dt;
73a25462
HR		 2508 unsigned long flags;
2509
a4b53a11
HR		 2510#ifdef AHD_DEBUG
2511 if ((ahd_debug & AHD_SHOW_DV) != 0)
2512 printf("%s: %s IU\n", ahd_name(ahd),
2513 iu ? "enabling" : "disabling");
2514#endif
2515
2516 if (iu) {
73a25462 2517 ppr_options |= MSG_EXT_PPR_IU_REQ;
a4b53a11
HR		 2518 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2519 }
2520
2521 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2522
2523 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2524 starget->channel + 'A', ROLE_INITIATOR);
2525 ahd_find_syncrate(ahd, &period, &ppr_options,
2526 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2527
73a25462
HR		 2528 ahd_lock(ahd, &flags);
2529 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2530 ppr_options, AHD_TRANS_GOAL, FALSE);
2531 ahd_unlock(ahd, &flags);
2532}
1da177e4 2533
73a25462
HR		 2534static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2535{
2536 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2537 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2538 struct ahd_tmode_tstate *tstate;
2539 struct ahd_initiator_tinfo *tinfo
2540 = ahd_fetch_transinfo(ahd,
2541 starget->channel + 'A',
2542 shost->this_id, starget->id, &tstate);
2543 struct ahd_devinfo devinfo;
2544 unsigned int ppr_options = tinfo->goal.ppr_options
2545 & ~MSG_EXT_PPR_RD_STRM;
2546 unsigned int period = tinfo->goal.period;
2547 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2548 unsigned long flags;
2549
a4b53a11
HR		 2550#ifdef AHD_DEBUG
2551 if ((ahd_debug & AHD_SHOW_DV) != 0)
2552 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2553 rdstrm ? "enabling" : "disabling");
2554#endif
2555
73a25462
HR		 2556 if (rdstrm)
2557 ppr_options |= MSG_EXT_PPR_RD_STRM;
2558
2559 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2560 starget->channel + 'A', ROLE_INITIATOR);
2561 ahd_find_syncrate(ahd, &period, &ppr_options,
2562 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2563
a4b53a11
HR		 2564 ahd_lock(ahd, &flags);
2565 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2566 ppr_options, AHD_TRANS_GOAL, FALSE);
2567 ahd_unlock(ahd, &flags);
2568}
2569
2570static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2571{
2572 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2573 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2574 struct ahd_tmode_tstate *tstate;
2575 struct ahd_initiator_tinfo *tinfo
2576 = ahd_fetch_transinfo(ahd,
2577 starget->channel + 'A',
2578 shost->this_id, starget->id, &tstate);
2579 struct ahd_devinfo devinfo;
2580 unsigned int ppr_options = tinfo->goal.ppr_options
2581 & ~MSG_EXT_PPR_WR_FLOW;
2582 unsigned int period = tinfo->goal.period;
2583 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2584 unsigned long flags;
2585
2586#ifdef AHD_DEBUG
2587 if ((ahd_debug & AHD_SHOW_DV) != 0)
2588 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2589 wrflow ? "enabling" : "disabling");
2590#endif
2591
2592 if (wrflow)
2593 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2594
2595 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2596 starget->channel + 'A', ROLE_INITIATOR);
2597 ahd_find_syncrate(ahd, &period, &ppr_options,
2598 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2599
a4b53a11
HR		 2600 ahd_lock(ahd, &flags);
2601 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2602 ppr_options, AHD_TRANS_GOAL, FALSE);
2603 ahd_unlock(ahd, &flags);
2604}
2605
2606static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2607{
2608 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2609 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2610 struct ahd_tmode_tstate *tstate;
2611 struct ahd_initiator_tinfo *tinfo
2612 = ahd_fetch_transinfo(ahd,
2613 starget->channel + 'A',
2614 shost->this_id, starget->id, &tstate);
2615 struct ahd_devinfo devinfo;
2616 unsigned int ppr_options = tinfo->goal.ppr_options
2617 & ~MSG_EXT_PPR_RTI;
2618 unsigned int period = tinfo->goal.period;
2619 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2620 unsigned long flags;
2621
2622 if ((ahd->features & AHD_RTI) == 0) {
2623#ifdef AHD_DEBUG
2624 if ((ahd_debug & AHD_SHOW_DV) != 0)
2625 printf("%s: RTI not available\n", ahd_name(ahd));
2626#endif
2627 return;
2628 }
2629
2630#ifdef AHD_DEBUG
2631 if ((ahd_debug & AHD_SHOW_DV) != 0)
2632 printf("%s: %s RTI\n", ahd_name(ahd),
2633 rti ? "enabling" : "disabling");
2634#endif
2635
2636 if (rti)
2637 ppr_options |= MSG_EXT_PPR_RTI;
2638
2639 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2640 starget->channel + 'A', ROLE_INITIATOR);
2641 ahd_find_syncrate(ahd, &period, &ppr_options,
2642 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2643
a4b53a11
HR		 2644 ahd_lock(ahd, &flags);
2645 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2646 ppr_options, AHD_TRANS_GOAL, FALSE);
2647 ahd_unlock(ahd, &flags);
2648}
2649
2650static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2651{
2652 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2653 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2654 struct ahd_tmode_tstate *tstate;
2655 struct ahd_initiator_tinfo *tinfo
2656 = ahd_fetch_transinfo(ahd,
2657 starget->channel + 'A',
2658 shost->this_id, starget->id, &tstate);
2659 struct ahd_devinfo devinfo;
2660 unsigned int ppr_options = tinfo->goal.ppr_options
2661 & ~MSG_EXT_PPR_PCOMP_EN;
2662 unsigned int period = tinfo->goal.period;
2663 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2664 unsigned long flags;
2665
2666#ifdef AHD_DEBUG
2667 if ((ahd_debug & AHD_SHOW_DV) != 0)
2668 printf("%s: %s Precompensation\n", ahd_name(ahd),
2669 pcomp ? "Enable" : "Disable");
2670#endif
2671
2672 if (pcomp)
2673 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2674
2675 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2676 starget->channel + 'A', ROLE_INITIATOR);
2677 ahd_find_syncrate(ahd, &period, &ppr_options,
2678 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2679
73a25462
HR		 2680 ahd_lock(ahd, &flags);
2681 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2682 ppr_options, AHD_TRANS_GOAL, FALSE);
2683 ahd_unlock(ahd, &flags);
1da177e4
LT		 2684}
2685
88ff29a4
JB		 2686static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2687{
2688 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2689 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2690 struct ahd_tmode_tstate *tstate;
2691 struct ahd_initiator_tinfo *tinfo
2692 = ahd_fetch_transinfo(ahd,
2693 starget->channel + 'A',
2694 shost->this_id, starget->id, &tstate);
2695 struct ahd_devinfo devinfo;
2696 unsigned int ppr_options = tinfo->goal.ppr_options
2697 & ~MSG_EXT_PPR_HOLD_MCS;
2698 unsigned int period = tinfo->goal.period;
2699 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2700 unsigned long flags;
2701
2702 if (hold)
2703 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2704
2705 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2706 starget->channel + 'A', ROLE_INITIATOR);
2707 ahd_find_syncrate(ahd, &period, &ppr_options,
2708 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2709
2710 ahd_lock(ahd, &flags);
2711 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2712 ppr_options, AHD_TRANS_GOAL, FALSE);
2713 ahd_unlock(ahd, &flags);
2714}
2715
2716
2717
73a25462
HR		 2718static struct spi_function_template ahd_linux_transport_functions = {
2719 .set_offset = ahd_linux_set_offset,
2720 .show_offset = 1,
2721 .set_period = ahd_linux_set_period,
2722 .show_period = 1,
2723 .set_width = ahd_linux_set_width,
2724 .show_width = 1,
2725 .set_dt = ahd_linux_set_dt,
2726 .show_dt = 1,
2727 .set_iu = ahd_linux_set_iu,
2728 .show_iu = 1,
2729 .set_qas = ahd_linux_set_qas,
2730 .show_qas = 1,
2731 .set_rd_strm = ahd_linux_set_rd_strm,
2732 .show_rd_strm = 1,
a4b53a11
HR		 2733 .set_wr_flow = ahd_linux_set_wr_flow,
2734 .show_wr_flow = 1,
2735 .set_rti = ahd_linux_set_rti,
2736 .show_rti = 1,
2737 .set_pcomp_en = ahd_linux_set_pcomp_en,
2738 .show_pcomp_en = 1,
88ff29a4
JB		 2739 .set_hold_mcs = ahd_linux_set_hold_mcs,
2740 .show_hold_mcs = 1,
73a25462
HR		 2741};
2742
1da177e4
LT		 2743static int __init
2744ahd_linux_init(void)
2745{
85a46523
CH		 2746 int error = 0;
2747
2748 /*
2749 * If we've been passed any parameters, process them now.
2750 */
2751 if (aic79xx)
2752 aic79xx_setup(aic79xx);
2753
2754 ahd_linux_transport_template =
2755 spi_attach_transport(&ahd_linux_transport_functions);
73a25462
HR		 2756 if (!ahd_linux_transport_template)
2757 return -ENODEV;
85a46523 2758
73a25462
HR		 2759 scsi_transport_reserve_target(ahd_linux_transport_template,
2760 sizeof(struct ahd_linux_target));
2761 scsi_transport_reserve_device(ahd_linux_transport_template,
2762 sizeof(struct ahd_linux_device));
a80b3424 2763
85a46523
CH		 2764 error = ahd_linux_pci_init();
2765 if (error)
2766 spi_release_transport(ahd_linux_transport_template);
2767 return error;
1da177e4
LT		 2768}
2769
2770static void __exit
2771ahd_linux_exit(void)
2772{
1da177e4 2773 ahd_linux_pci_exit();
73a25462 2774 spi_release_transport(ahd_linux_transport_template);
1da177e4
LT		 2775}
2776
2777module_init(ahd_linux_init);
2778module_exit(ahd_linux_exit);
Linux kernel - Deliverables
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