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[SCSI] drivers/scsi: Handcrafted MIN/MAX macro removal
[linux-2.6-block.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
1da177e4
LT		 245/*
246 * Should we force EXTENDED translation on a controller.
247 * 0 == Use whatever is in the SEEPROM or default to off
248 * 1 == Use whatever is in the SEEPROM or default to on
249 */
250static uint32_t aic79xx_extended;
251
252/*
253 * PCI bus parity checking of the Adaptec controllers. This is somewhat
254 * dubious at best. To my knowledge, this option has never actually
255 * solved a PCI parity problem, but on certain machines with broken PCI
256 * chipset configurations, it can generate tons of false error messages.
257 * It's included in the driver for completeness.
258 * 0 = Shut off PCI parity check
259 * non-0 = Enable PCI parity check
260 *
261 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
262 * variable to -1 you would actually want to simply pass the variable
263 * name without a number. That will invert the 0 which will result in
264 * -1.
265 */
266static uint32_t aic79xx_pci_parity = ~0;
267
268/*
269 * There are lots of broken chipsets in the world. Some of them will
270 * violate the PCI spec when we issue byte sized memory writes to our
271 * controller. I/O mapped register access, if allowed by the given
272 * platform, will work in almost all cases.
273 */
274uint32_t aic79xx_allow_memio = ~0;
275
1da177e4
LT		 276/*
277 * So that we can set how long each device is given as a selection timeout.
278 * The table of values goes like this:
279 * 0 - 256ms
280 * 1 - 128ms
281 * 2 - 64ms
282 * 3 - 32ms
283 * We default to 256ms because some older devices need a longer time
284 * to respond to initial selection.
285 */
286static uint32_t aic79xx_seltime;
287
288/*
289 * Certain devices do not perform any aging on commands. Should the
290 * device be saturated by commands in one portion of the disk, it is
291 * possible for transactions on far away sectors to never be serviced.
292 * To handle these devices, we can periodically send an ordered tag to
293 * force all outstanding transactions to be serviced prior to a new
294 * transaction.
295 */
296uint32_t aic79xx_periodic_otag;
297
3fb08612
HR		 298/* Some storage boxes are using an LSI chip which has a bug making it
299 * impossible to use aic79xx Rev B chip in 320 speeds. The following
300 * storage boxes have been reported to be buggy:
301 * EonStor 3U 16-Bay: U16U-G3A3
302 * EonStor 2U 12-Bay: U12U-G3A3
303 * SentinelRAID: 2500F R5 / R6
304 * SentinelRAID: 2500F R1
305 * SentinelRAID: 2500F/1500F
306 * SentinelRAID: 150F
307 *
308 * To get around this LSI bug, you can set your board to 160 mode
309 * or you can enable the SLOWCRC bit.
310 */
311uint32_t aic79xx_slowcrc;
312
1da177e4
LT		 313/*
314 * Module information and settable options.
315 */
316static char *aic79xx = NULL;
317
318MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
319MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
320MODULE_LICENSE("Dual BSD/GPL");
321MODULE_VERSION(AIC79XX_DRIVER_VERSION);
73a25462 322module_param(aic79xx, charp, 0444);
1da177e4 323MODULE_PARM_DESC(aic79xx,
2b6ee9b5 324"period-delimited options string:\n"
1da177e4
LT		 325" verbose Enable verbose/diagnostic logging\n"
326" allow_memio Allow device registers to be memory mapped\n"
327" debug Bitmask of debug values to enable\n"
328" no_reset Supress initial bus resets\n"
329" extended Enable extended geometry on all controllers\n"
330" periodic_otag Send an ordered tagged transaction\n"
331" periodically to prevent tag starvation.\n"
332" This may be required by some older disk\n"
333" or drives/RAID arrays.\n"
1da177e4
LT		 334" tag_info:<tag_str> Set per-target tag depth\n"
335" global_tag_depth:<int> Global tag depth for all targets on all buses\n"
1da177e4
LT		 336" slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
337" precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
338" amplitude:<int> Set the signal amplitude (0-7).\n"
339" seltime:<int> Selection Timeout:\n"
340" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
3fb08612 341" slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
1da177e4
LT		 342"\n"
343" Sample /etc/modprobe.conf line:\n"
344" Enable verbose logging\n"
345" Set tag depth on Controller 2/Target 2 to 10 tags\n"
346" Shorten the selection timeout to 128ms\n"
347"\n"
348" options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
2b6ee9b5 349);
1da177e4
LT		 350
351static void ahd_linux_handle_scsi_status(struct ahd_softc *,
73a25462 352 struct scsi_device *,
1da177e4
LT		 353 struct scb *);
354static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
73a25462 355 struct scsi_cmnd *cmd);
6902f416 356static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
1da177e4 357static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
1da177e4
LT		 358static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
359 struct ahd_devinfo *devinfo);
73a25462 360static void ahd_linux_device_queue_depth(struct scsi_device *);
60a13213 361static int ahd_linux_run_command(struct ahd_softc*,
73a25462 362 struct ahd_linux_device *,
60a13213 363 struct scsi_cmnd *);
1da177e4 364static void ahd_linux_setup_tag_info_global(char *p);
73a25462 365static int aic79xx_setup(char *c);
85a46523
CH		 366
367static int ahd_linux_unit;
368
1da177e4
LT		 369
370/****************************** Inlines ***************************************/
1da177e4
LT		 371static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
372
1da177e4
LT		 373static __inline void
374ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
375{
73a25462 376 struct scsi_cmnd *cmd;
1da177e4
LT		 377 int direction;
378
379 cmd = scb->io_ctx;
be7db055 380 direction = cmd->sc_data_direction;
1da177e4
LT		 381 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
382 if (cmd->use_sg != 0) {
383 struct scatterlist *sg;
384
385 sg = (struct scatterlist *)cmd->request_buffer;
386 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
387 } else if (cmd->request_bufflen != 0) {
388 pci_unmap_single(ahd->dev_softc,
389 scb->platform_data->buf_busaddr,
390 cmd->request_bufflen, direction);
391 }
392}
393
394/******************************** Macros **************************************/
395#define BUILD_SCSIID(ahd, cmd) \
422c0d61 396 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
1da177e4 397
1da177e4
LT		 398/*
399 * Return a string describing the driver.
400 */
401static const char *
402ahd_linux_info(struct Scsi_Host *host)
403{
404 static char buffer[512];
405 char ahd_info[256];
406 char *bp;
407 struct ahd_softc *ahd;
408
409 bp = &buffer[0];
410 ahd = *(struct ahd_softc **)host->hostdata;
411 memset(bp, 0, sizeof(buffer));
412 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
413 strcat(bp, AIC79XX_DRIVER_VERSION);
414 strcat(bp, "\n");
415 strcat(bp, " <");
416 strcat(bp, ahd->description);
417 strcat(bp, ">\n");
418 strcat(bp, " ");
419 ahd_controller_info(ahd, ahd_info);
420 strcat(bp, ahd_info);
421 strcat(bp, "\n");
422
423 return (bp);
424}
425
426/*
427 * Queue an SCB to the controller.
428 */
429static int
73a25462 430ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
1da177e4
LT		 431{
432 struct ahd_softc *ahd;
73a25462 433 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
4065a413 434 int rtn = SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 435
436 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
437
7b22da38
HR		 438 cmd->scsi_done = scsi_done;
439 cmd->result = CAM_REQ_INPROG << 16;
440 rtn = ahd_linux_run_command(ahd, dev, cmd);
1da177e4 441
4065a413 442 return rtn;
1da177e4
LT		 443}
444
73a25462
HR		 445static inline struct scsi_target **
446ahd_linux_target_in_softc(struct scsi_target *starget)
447{
448 struct ahd_softc *ahd =
449 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
450 unsigned int target_offset;
451
452 target_offset = starget->id;
453 if (starget->channel != 0)
454 target_offset += 8;
455
456 return &ahd->platform_data->starget[target_offset];
457}
458
1da177e4 459static int
73a25462 460ahd_linux_target_alloc(struct scsi_target *starget)
1da177e4 461{
73a25462
HR		 462 struct ahd_softc *ahd =
463 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
986a25f9 464 struct seeprom_config *sc = ahd->seep_config;
73a25462
HR		 465 unsigned long flags;
466 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
73a25462
HR		 467 struct ahd_devinfo devinfo;
468 struct ahd_initiator_tinfo *tinfo;
469 struct ahd_tmode_tstate *tstate;
470 char channel = starget->channel + 'A';
1da177e4 471
73a25462
HR		 472 ahd_lock(ahd, &flags);
473
474 BUG_ON(*ahd_targp != NULL);
475
476 *ahd_targp = starget;
73a25462 477
986a25f9
HR		 478 if (sc) {
479 int flags = sc->device_flags[starget->id];
480
481 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
482 starget->id, &tstate);
483
484 if ((flags & CFPACKETIZED) == 0) {
485 /* Do not negotiate packetized transfers */
486 spi_rd_strm(starget) = 0;
487 spi_pcomp_en(starget) = 0;
488 spi_rti(starget) = 0;
489 spi_wr_flow(starget) = 0;
490 spi_hold_mcs(starget) = 0;
491 } else {
492 if ((ahd->features & AHD_RTI) == 0)
493 spi_rti(starget) = 0;
494 }
495
496 if ((flags & CFQAS) == 0)
497 spi_qas(starget) = 0;
498
499 /* Transinfo values have been set to BIOS settings */
500 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
501 spi_min_period(starget) = tinfo->user.period;
502 spi_max_offset(starget) = tinfo->user.offset;
503 }
504
73a25462
HR		 505 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
506 starget->id, &tstate);
507 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
508 CAM_LUN_WILDCARD, channel,
509 ROLE_INITIATOR);
73a25462
HR		 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);
73a25462 532 struct ahd_linux_device *dev;
1da177e4 533
1da177e4 534 if (bootverbose)
73a25462
HR		 535 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
536
73a25462
HR		 537 dev = scsi_transport_device_data(sdev);
538 memset(dev, 0, sizeof(*dev));
539
540 /*
541 * We start out life using untagged
542 * transactions of which we allow one.
543 */
544 dev->openings = 1;
545
1da177e4 546 /*
73a25462
HR		 547 * Set maxtags to 0. This will be changed if we
548 * later determine that we are dealing with
549 * a tagged queuing capable device.
1da177e4 550 */
73a25462
HR		 551 dev->maxtags = 0;
552
1da177e4
LT		 553 return (0);
554}
555
73a25462
HR		 556static int
557ahd_linux_slave_configure(struct scsi_device *sdev)
558{
559 struct ahd_softc *ahd;
560
561 ahd = *((struct ahd_softc **)sdev->host->hostdata);
562 if (bootverbose)
017560fc 563 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
73a25462
HR		 564
565 ahd_linux_device_queue_depth(sdev);
566
567 /* Initial Domain Validation */
568 if (!spi_initial_dv(sdev->sdev_target))
569 spi_dv_device(sdev);
570
571 return 0;
572}
573
1da177e4
LT		 574#if defined(__i386__)
575/*
576 * Return the disk geometry for the given SCSI device.
577 */
578static int
1da177e4
LT		 579ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
580 sector_t capacity, int geom[])
581{
582 uint8_t *bh;
1da177e4
LT		 583 int heads;
584 int sectors;
585 int cylinders;
586 int ret;
587 int extended;
588 struct ahd_softc *ahd;
589
590 ahd = *((struct ahd_softc **)sdev->host->hostdata);
591
1da177e4 592 bh = scsi_bios_ptable(bdev);
1da177e4
LT		 593 if (bh) {
594 ret = scsi_partsize(bh, capacity,
595 &geom[2], &geom[0], &geom[1]);
1da177e4 596 kfree(bh);
1da177e4
LT		 597 if (ret != -1)
598 return (ret);
599 }
600 heads = 64;
601 sectors = 32;
602 cylinders = aic_sector_div(capacity, heads, sectors);
603
604 if (aic79xx_extended != 0)
605 extended = 1;
606 else
607 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
608 if (extended && cylinders >= 1024) {
609 heads = 255;
610 sectors = 63;
611 cylinders = aic_sector_div(capacity, heads, sectors);
612 }
613 geom[0] = heads;
614 geom[1] = sectors;
615 geom[2] = cylinders;
616 return (0);
617}
618#endif
619
620/*
621 * Abort the current SCSI command(s).
622 */
623static int
73a25462
HR		 624ahd_linux_abort(struct scsi_cmnd *cmd)
625{
626 int error;
6902f416
HR		 627
628 error = ahd_linux_queue_abort_cmd(cmd);
73a25462 629
73a25462
HR		 630 return error;
631}
632
633/*
634 * Attempt to send a target reset message to the device that timed out.
635 */
636static int
637ahd_linux_dev_reset(struct scsi_cmnd *cmd)
638{
6902f416
HR		 639 struct ahd_softc *ahd;
640 struct ahd_linux_device *dev;
641 struct scb *reset_scb;
642 u_int cdb_byte;
643 int retval = SUCCESS;
644 int paused;
645 int wait;
646 struct ahd_initiator_tinfo *tinfo;
647 struct ahd_tmode_tstate *tstate;
648 unsigned long flags;
6e9a4738 649 DECLARE_COMPLETION_ONSTACK(done);
73a25462 650
6902f416
HR		 651 reset_scb = NULL;
652 paused = FALSE;
653 wait = FALSE;
654 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
655
656 scmd_printk(KERN_INFO, cmd,
657 "Attempting to queue a TARGET RESET message:");
658
659 printf("CDB:");
660 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
661 printf(" 0x%x", cmd->cmnd[cdb_byte]);
662 printf("\n");
663
664 /*
665 * Determine if we currently own this command.
666 */
667 dev = scsi_transport_device_data(cmd->device);
668
669 if (dev == NULL) {
670 /*
671 * No target device for this command exists,
672 * so we must not still own the command.
673 */
674 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
675 return SUCCESS;
676 }
677
678 /*
679 * Generate us a new SCB
680 */
681 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
682 if (!reset_scb) {
683 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
684 return FAILED;
685 }
686
687 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
688 cmd->device->id, &tstate);
689 reset_scb->io_ctx = cmd;
690 reset_scb->platform_data->dev = dev;
691 reset_scb->sg_count = 0;
692 ahd_set_residual(reset_scb, 0);
693 ahd_set_sense_residual(reset_scb, 0);
694 reset_scb->platform_data->xfer_len = 0;
695 reset_scb->hscb->control = 0;
696 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
697 reset_scb->hscb->lun = cmd->device->lun;
698 reset_scb->hscb->cdb_len = 0;
699 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
700 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
701 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
702 reset_scb->flags |= SCB_PACKETIZED;
703 } else {
704 reset_scb->hscb->control |= MK_MESSAGE;
705 }
706 dev->openings--;
707 dev->active++;
708 dev->commands_issued++;
709
710 ahd_lock(ahd, &flags);
711
712 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
713 ahd_queue_scb(ahd, reset_scb);
714
715 ahd->platform_data->eh_done = &done;
716 ahd_unlock(ahd, &flags);
717
718 printf("%s: Device reset code sleeping\n", ahd_name(ahd));
719 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
720 ahd_lock(ahd, &flags);
721 ahd->platform_data->eh_done = NULL;
722 ahd_unlock(ahd, &flags);
723 printf("%s: Device reset timer expired (active %d)\n",
724 ahd_name(ahd), dev->active);
725 retval = FAILED;
726 }
727 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
728
729 return (retval);
73a25462
HR		 730}
731
732/*
733 * Reset the SCSI bus.
734 */
735static int
736ahd_linux_bus_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 737{
738 struct ahd_softc *ahd;
73a25462 739 int found;
f41b5cec 740 unsigned long flags;
1da177e4 741
1da177e4 742 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
73a25462
HR		 743#ifdef AHD_DEBUG
744 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
745 printf("%s: Bus reset called for cmd %p\n",
746 ahd_name(ahd), cmd);
747#endif
f41b5cec
HR		 748 ahd_lock(ahd, &flags);
749
422c0d61 750 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
73a25462 751 /*initiate reset*/TRUE);
f41b5cec 752 ahd_unlock(ahd, &flags);
1da177e4 753
73a25462
HR		 754 if (bootverbose)
755 printf("%s: SCSI bus reset delivered. "
756 "%d SCBs aborted.\n", ahd_name(ahd), found);
1da177e4 757
73a25462
HR		 758 return (SUCCESS);
759}
1da177e4 760
73a25462
HR		 761struct scsi_host_template aic79xx_driver_template = {
762 .module = THIS_MODULE,
763 .name = "aic79xx",
85a46523 764 .proc_name = "aic79xx",
73a25462
HR		 765 .proc_info = ahd_linux_proc_info,
766 .info = ahd_linux_info,
767 .queuecommand = ahd_linux_queue,
768 .eh_abort_handler = ahd_linux_abort,
769 .eh_device_reset_handler = ahd_linux_dev_reset,
770 .eh_bus_reset_handler = ahd_linux_bus_reset,
771#if defined(__i386__)
772 .bios_param = ahd_linux_biosparam,
773#endif
774 .can_queue = AHD_MAX_QUEUE,
775 .this_id = -1,
80f1443c 776 .max_sectors = 8192,
73a25462
HR		 777 .cmd_per_lun = 2,
778 .use_clustering = ENABLE_CLUSTERING,
779 .slave_alloc = ahd_linux_slave_alloc,
780 .slave_configure = ahd_linux_slave_configure,
73a25462
HR		 781 .target_alloc = ahd_linux_target_alloc,
782 .target_destroy = ahd_linux_target_destroy,
783};
1da177e4 784
73a25462
HR		 785/******************************** Bus DMA *************************************/
786int
787ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
788 bus_size_t alignment, bus_size_t boundary,
789 dma_addr_t lowaddr, dma_addr_t highaddr,
790 bus_dma_filter_t *filter, void *filterarg,
791 bus_size_t maxsize, int nsegments,
792 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
793{
794 bus_dma_tag_t dmat;
795
796 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
797 if (dmat == NULL)
798 return (ENOMEM);
1da177e4 799
1da177e4 800 /*
73a25462
HR		 801 * Linux is very simplistic about DMA memory. For now don't
802 * maintain all specification information. Once Linux supplies
803 * better facilities for doing these operations, or the
804 * needs of this particular driver change, we might need to do
805 * more here.
1da177e4 806 */
73a25462
HR		 807 dmat->alignment = alignment;
808 dmat->boundary = boundary;
809 dmat->maxsize = maxsize;
810 *ret_tag = dmat;
811 return (0);
812}
1da177e4 813
73a25462
HR		 814void
815ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
816{
817 free(dmat, M_DEVBUF);
818}
1da177e4 819
73a25462
HR		 820int
821ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
822 int flags, bus_dmamap_t *mapp)
823{
824 *vaddr = pci_alloc_consistent(ahd->dev_softc,
825 dmat->maxsize, mapp);
826 if (*vaddr == NULL)
827 return (ENOMEM);
828 return(0);
829}
1da177e4 830
73a25462
HR		 831void
832ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
833 void* vaddr, bus_dmamap_t map)
834{
835 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
836 vaddr, map);
837}
838
839int
840ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
841 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
842 void *cb_arg, int flags)
843{
1da177e4 844 /*
73a25462
HR		 845 * Assume for now that this will only be used during
846 * initialization and not for per-transaction buffer mapping.
1da177e4 847 */
73a25462 848 bus_dma_segment_t stack_sg;
1da177e4 849
73a25462
HR		 850 stack_sg.ds_addr = map;
851 stack_sg.ds_len = dmat->maxsize;
852 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
853 return (0);
854}
1da177e4 855
73a25462
HR		 856void
857ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
858{
859}
1da177e4 860
73a25462
HR		 861int
862ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
863{
864 /* Nothing to do */
865 return (0);
866}
1da177e4 867
73a25462 868/********************* Platform Dependent Functions ***************************/
73a25462
HR		 869static void
870ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
871{
1da177e4 872
73a25462 873 if ((instance >= 0)
6391a113 874 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
73a25462
HR		 875 uint8_t *iocell_info;
876
877 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
878 iocell_info[index] = value & 0xFFFF;
879 if (bootverbose)
880 printf("iocell[%d:%ld] = %d\n", instance, index, value);
1da177e4 881 }
73a25462 882}
1da177e4 883
73a25462
HR		 884static void
885ahd_linux_setup_tag_info_global(char *p)
886{
887 int tags, i, j;
1da177e4 888
73a25462
HR		 889 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
890 printf("Setting Global Tags= %d\n", tags);
891
6391a113 892 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
73a25462
HR		 893 for (j = 0; j < AHD_NUM_TARGETS; j++) {
894 aic79xx_tag_info[i].tag_commands[j] = tags;
1da177e4 895 }
1da177e4 896 }
1da177e4
LT		 897}
898
1da177e4 899static void
73a25462 900ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1da177e4 901{
1da177e4 902
73a25462 903 if ((instance >= 0) && (targ >= 0)
6391a113 904 && (instance < ARRAY_SIZE(aic79xx_tag_info))
73a25462
HR		 905 && (targ < AHD_NUM_TARGETS)) {
906 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
907 if (bootverbose)
908 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1da177e4 909 }
1da177e4
LT		 910}
911
1ff92730
CH		 912static char *
913ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
914 void (*callback)(u_long, int, int, int32_t),
915 u_long callback_arg)
916{
917 char *tok_end;
918 char *tok_end2;
919 int i;
920 int instance;
921 int targ;
922 int done;
923 char tok_list[] = {'.', ',', '{', '}', '\0'};
924
925 /* All options use a ':' name/arg separator */
926 if (*opt_arg != ':')
927 return (opt_arg);
928 opt_arg++;
929 instance = -1;
930 targ = -1;
931 done = FALSE;
932 /*
933 * Restore separator that may be in
934 * the middle of our option argument.
935 */
936 tok_end = strchr(opt_arg, '\0');
937 if (tok_end < end)
938 *tok_end = ',';
939 while (!done) {
940 switch (*opt_arg) {
941 case '{':
942 if (instance == -1) {
943 instance = 0;
944 } else {
945 if (depth > 1) {
946 if (targ == -1)
947 targ = 0;
948 } else {
949 printf("Malformed Option %s\n",
950 opt_name);
951 done = TRUE;
952 }
953 }
954 opt_arg++;
955 break;
956 case '}':
957 if (targ != -1)
958 targ = -1;
959 else if (instance != -1)
960 instance = -1;
961 opt_arg++;
962 break;
963 case ',':
964 case '.':
965 if (instance == -1)
966 done = TRUE;
967 else if (targ >= 0)
968 targ++;
969 else if (instance >= 0)
970 instance++;
971 opt_arg++;
972 break;
973 case '\0':
974 done = TRUE;
975 break;
976 default:
977 tok_end = end;
978 for (i = 0; tok_list[i]; i++) {
979 tok_end2 = strchr(opt_arg, tok_list[i]);
980 if ((tok_end2) && (tok_end2 < tok_end))
981 tok_end = tok_end2;
982 }
983 callback(callback_arg, instance, targ,
984 simple_strtol(opt_arg, NULL, 0));
985 opt_arg = tok_end;
986 break;
987 }
988 }
989 return (opt_arg);
990}
991
1da177e4 992/*
73a25462
HR		 993 * Handle Linux boot parameters. This routine allows for assigning a value
994 * to a parameter with a ':' between the parameter and the value.
995 * ie. aic79xx=stpwlev:1,extended
1da177e4
LT		 996 */
997static int
73a25462 998aic79xx_setup(char *s)
1da177e4 999{
73a25462
HR		 1000 int i, n;
1001 char *p;
1002 char *end;
1da177e4 1003
73a25462
HR		 1004 static struct {
1005 const char *name;
1006 uint32_t *flag;
1007 } options[] = {
1008 { "extended", &aic79xx_extended },
1009 { "no_reset", &aic79xx_no_reset },
1010 { "verbose", &aic79xx_verbose },
1011 { "allow_memio", &aic79xx_allow_memio},
1da177e4 1012#ifdef AHD_DEBUG
73a25462 1013 { "debug", &ahd_debug },
1da177e4 1014#endif
73a25462
HR		 1015 { "periodic_otag", &aic79xx_periodic_otag },
1016 { "pci_parity", &aic79xx_pci_parity },
1017 { "seltime", &aic79xx_seltime },
1018 { "tag_info", NULL },
1019 { "global_tag_depth", NULL},
1020 { "slewrate", NULL },
1021 { "precomp", NULL },
1022 { "amplitude", NULL },
3fb08612 1023 { "slowcrc", &aic79xx_slowcrc },
73a25462 1024 };
1da177e4 1025
73a25462 1026 end = strchr(s, '\0');
1da177e4 1027
73a25462 1028 /*
6391a113 1029 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
73a25462 1030 * will never be 0 in this case.
6391a113
TK		 1031 */
1032 n = 0;
73a25462
HR		 1033
1034 while ((p = strsep(&s, ",.")) != NULL) {
1035 if (*p == '\0')
1036 continue;
6391a113 1037 for (i = 0; i < ARRAY_SIZE(options); i++) {
73a25462
HR		 1038
1039 n = strlen(options[i].name);
1040 if (strncmp(options[i].name, p, n) == 0)
1041 break;
1042 }
6391a113 1043 if (i == ARRAY_SIZE(options))
73a25462
HR		 1044 continue;
1045
1046 if (strncmp(p, "global_tag_depth", n) == 0) {
1047 ahd_linux_setup_tag_info_global(p + n);
1048 } else if (strncmp(p, "tag_info", n) == 0) {
1ff92730 1049 s = ahd_parse_brace_option("tag_info", p + n, end,
73a25462
HR		 1050 2, ahd_linux_setup_tag_info, 0);
1051 } else if (strncmp(p, "slewrate", n) == 0) {
1ff92730 1052 s = ahd_parse_brace_option("slewrate",
73a25462
HR		 1053 p + n, end, 1, ahd_linux_setup_iocell_info,
1054 AIC79XX_SLEWRATE_INDEX);
1055 } else if (strncmp(p, "precomp", n) == 0) {
1ff92730 1056 s = ahd_parse_brace_option("precomp",
73a25462
HR		 1057 p + n, end, 1, ahd_linux_setup_iocell_info,
1058 AIC79XX_PRECOMP_INDEX);
1059 } else if (strncmp(p, "amplitude", n) == 0) {
1ff92730 1060 s = ahd_parse_brace_option("amplitude",
73a25462
HR		 1061 p + n, end, 1, ahd_linux_setup_iocell_info,
1062 AIC79XX_AMPLITUDE_INDEX);
1063 } else if (p[n] == ':') {
1064 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1065 } else if (!strncmp(p, "verbose", n)) {
1066 *(options[i].flag) = 1;
1067 } else {
1068 *(options[i].flag) ^= 0xFFFFFFFF;
1069 }
1070 }
1071 return 1;
1da177e4
LT		 1072}
1073
73a25462
HR		 1074__setup("aic79xx=", aic79xx_setup);
1075
1076uint32_t aic79xx_verbose;
1da177e4 1077
1da177e4 1078int
73a25462 1079ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1da177e4 1080{
73a25462
HR		 1081 char buf[80];
1082 struct Scsi_Host *host;
1083 char *new_name;
1084 u_long s;
e7a1ca1d 1085 int retval;
1da177e4 1086
73a25462
HR		 1087 template->name = ahd->description;
1088 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1089 if (host == NULL)
1da177e4
LT		 1090 return (ENOMEM);
1091
73a25462 1092 *((struct ahd_softc **)host->hostdata) = ahd;
73a25462
HR		 1093 ahd->platform_data->host = host;
1094 host->can_queue = AHD_MAX_QUEUE;
1095 host->cmd_per_lun = 2;
1096 host->sg_tablesize = AHD_NSEG;
1097 host->this_id = ahd->our_id;
1098 host->irq = ahd->platform_data->irq;
1099 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1100 host->max_lun = AHD_NUM_LUNS;
1101 host->max_channel = 0;
1102 host->sg_tablesize = AHD_NSEG;
eb221849 1103 ahd_lock(ahd, &s);
85a46523 1104 ahd_set_unit(ahd, ahd_linux_unit++);
eb221849 1105 ahd_unlock(ahd, &s);
73a25462
HR		 1106 sprintf(buf, "scsi%d", host->host_no);
1107 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1108 if (new_name != NULL) {
1109 strcpy(new_name, buf);
1110 ahd_set_name(ahd, new_name);
1111 }
1112 host->unique_id = ahd->unit;
1113 ahd_linux_initialize_scsi_bus(ahd);
1114 ahd_intr_enable(ahd, TRUE);
73a25462
HR		 1115
1116 host->transportt = ahd_linux_transport_template;
1117
e7a1ca1d
JJ		 1118 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1119 if (retval) {
1120 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1121 scsi_host_put(host);
1122 return retval;
1123 }
1124
73a25462 1125 scsi_scan_host(host);
e7a1ca1d 1126 return 0;
1da177e4
LT		 1127}
1128
73a25462
HR		 1129uint64_t
1130ahd_linux_get_memsize(void)
1da177e4 1131{
73a25462
HR		 1132 struct sysinfo si;
1133
1134 si_meminfo(&si);
1135 return ((uint64_t)si.totalram << PAGE_SHIFT);
1da177e4
LT		 1136}
1137
73a25462
HR		 1138/*
1139 * Place the SCSI bus into a known state by either resetting it,
1140 * or forcing transfer negotiations on the next command to any
1141 * target.
1142 */
1143static void
1144ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1da177e4 1145{
73a25462
HR		 1146 u_int target_id;
1147 u_int numtarg;
eb221849 1148 unsigned long s;
1da177e4 1149
73a25462
HR		 1150 target_id = 0;
1151 numtarg = 0;
1152
1153 if (aic79xx_no_reset != 0)
1154 ahd->flags &= ~AHD_RESET_BUS_A;
1155
1156 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1157 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1158 else
1159 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1da177e4 1160
eb221849
HR		 1161 ahd_lock(ahd, &s);
1162
1da177e4 1163 /*
73a25462
HR		 1164 * Force negotiation to async for all targets that
1165 * will not see an initial bus reset.
1da177e4 1166 */
73a25462
HR		 1167 for (; target_id < numtarg; target_id++) {
1168 struct ahd_devinfo devinfo;
1169 struct ahd_initiator_tinfo *tinfo;
1170 struct ahd_tmode_tstate *tstate;
1171
1172 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1173 target_id, &tstate);
1174 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1175 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1176 ahd_update_neg_request(ahd, &devinfo, tstate,
1177 tinfo, AHD_NEG_ALWAYS);
1178 }
eb221849 1179 ahd_unlock(ahd, &s);
73a25462
HR		 1180 /* Give the bus some time to recover */
1181 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1182 ahd_freeze_simq(ahd);
eb221849
HR		 1183 msleep(AIC79XX_RESET_DELAY);
1184 ahd_release_simq(ahd);
73a25462 1185 }
1da177e4
LT		 1186}
1187
1188int
73a25462 1189ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1da177e4 1190{
73a25462
HR		 1191 ahd->platform_data =
1192 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1193 if (ahd->platform_data == NULL)
1194 return (ENOMEM);
1195 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1196 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1197 ahd_lockinit(ahd);
73a25462 1198 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1da177e4
LT		 1199 return (0);
1200}
1201
73a25462
HR		 1202void
1203ahd_platform_free(struct ahd_softc *ahd)
1da177e4 1204{
73a25462 1205 struct scsi_target *starget;
f89d0a4e 1206 int i;
1da177e4 1207
73a25462 1208 if (ahd->platform_data != NULL) {
73a25462
HR		 1209 /* destroy all of the device and target objects */
1210 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1211 starget = ahd->platform_data->starget[i];
1212 if (starget != NULL) {
73a25462
HR		 1213 ahd->platform_data->starget[i] = NULL;
1214 }
1215 }
1da177e4 1216
73a25462
HR		 1217 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1218 free_irq(ahd->platform_data->irq, ahd);
1219 if (ahd->tags[0] == BUS_SPACE_PIO
1220 && ahd->bshs[0].ioport != 0)
1221 release_region(ahd->bshs[0].ioport, 256);
1222 if (ahd->tags[1] == BUS_SPACE_PIO
1223 && ahd->bshs[1].ioport != 0)
1224 release_region(ahd->bshs[1].ioport, 256);
1225 if (ahd->tags[0] == BUS_SPACE_MEMIO
1226 && ahd->bshs[0].maddr != NULL) {
1227 iounmap(ahd->bshs[0].maddr);
1228 release_mem_region(ahd->platform_data->mem_busaddr,
1229 0x1000);
1230 }
97af50f6
JB		 1231 if (ahd->platform_data->host)
1232 scsi_host_put(ahd->platform_data->host);
1233
73a25462
HR		 1234 free(ahd->platform_data, M_DEVBUF);
1235 }
1da177e4
LT		 1236}
1237
73a25462
HR		 1238void
1239ahd_platform_init(struct ahd_softc *ahd)
1da177e4 1240{
73a25462
HR		 1241 /*
1242 * Lookup and commit any modified IO Cell options.
1243 */
6391a113 1244 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
73a25462 1245 struct ahd_linux_iocell_opts *iocell_opts;
1da177e4 1246
73a25462
HR		 1247 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1248 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1249 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1250 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1251 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1252 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1253 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1da177e4 1254 }
1da177e4 1255
1da177e4
LT		 1256}
1257
73a25462
HR		 1258void
1259ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1da177e4 1260{
73a25462
HR		 1261 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1262 SCB_GET_CHANNEL(ahd, scb),
1263 SCB_GET_LUN(scb), SCB_LIST_NULL,
1264 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1da177e4
LT		 1265}
1266
73a25462 1267void
f89d0a4e
HR		 1268ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1269 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1da177e4 1270{
73a25462 1271 struct ahd_linux_device *dev;
73a25462
HR		 1272 int was_queuing;
1273 int now_queuing;
1da177e4 1274
73a25462
HR		 1275 if (sdev == NULL)
1276 return;
1da177e4 1277
73a25462 1278 dev = scsi_transport_device_data(sdev);
1da177e4 1279
73a25462
HR		 1280 if (dev == NULL)
1281 return;
1282 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1283 switch (alg) {
1284 default:
1285 case AHD_QUEUE_NONE:
1286 now_queuing = 0;
1287 break;
1288 case AHD_QUEUE_BASIC:
1289 now_queuing = AHD_DEV_Q_BASIC;
1290 break;
1291 case AHD_QUEUE_TAGGED:
1292 now_queuing = AHD_DEV_Q_TAGGED;
1293 break;
1294 }
1295 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1296 && (was_queuing != now_queuing)
1297 && (dev->active != 0)) {
1298 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1299 dev->qfrozen++;
1da177e4 1300 }
1da177e4 1301
73a25462
HR		 1302 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1303 if (now_queuing) {
1304 u_int usertags;
1da177e4 1305
73a25462
HR		 1306 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1307 if (!was_queuing) {
1308 /*
1309 * Start out agressively and allow our
1310 * dynamic queue depth algorithm to take
1311 * care of the rest.
1312 */
1313 dev->maxtags = usertags;
1314 dev->openings = dev->maxtags - dev->active;
1da177e4 1315 }
73a25462
HR		 1316 if (dev->maxtags == 0) {
1317 /*
1318 * Queueing is disabled by the user.
1319 */
1320 dev->openings = 1;
1321 } else if (alg == AHD_QUEUE_TAGGED) {
1322 dev->flags |= AHD_DEV_Q_TAGGED;
1323 if (aic79xx_periodic_otag != 0)
1324 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1325 } else
1326 dev->flags |= AHD_DEV_Q_BASIC;
1327 } else {
1328 /* We can only have one opening. */
1329 dev->maxtags = 0;
1330 dev->openings = 1 - dev->active;
1da177e4 1331 }
1da177e4 1332
73a25462
HR		 1333 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1334 case AHD_DEV_Q_BASIC:
0aa800db
HR		 1335 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1336 scsi_activate_tcq(sdev, dev->openings + dev->active);
73a25462
HR		 1337 break;
1338 case AHD_DEV_Q_TAGGED:
0aa800db
HR		 1339 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1340 scsi_activate_tcq(sdev, dev->openings + dev->active);
73a25462
HR		 1341 break;
1342 default:
1da177e4 1343 /*
73a25462
HR		 1344 * We allow the OS to queue 2 untagged transactions to
1345 * us at any time even though we can only execute them
1346 * serially on the controller/device. This should
1347 * remove some latency.
1da177e4 1348 */
0aa800db 1349 scsi_deactivate_tcq(sdev, 1);
73a25462 1350 break;
1da177e4 1351 }
1da177e4
LT		 1352}
1353
73a25462
HR		 1354int
1355ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1356 int lun, u_int tag, role_t role, uint32_t status)
1da177e4 1357{
73a25462 1358 return 0;
1da177e4
LT		 1359}
1360
73a25462
HR		 1361static u_int
1362ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1da177e4 1363{
73a25462
HR		 1364 static int warned_user;
1365 u_int tags;
1da177e4 1366
73a25462
HR		 1367 tags = 0;
1368 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
6391a113 1369 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
73a25462
HR		 1370
1371 if (warned_user == 0) {
1372 printf(KERN_WARNING
1373"aic79xx: WARNING: Insufficient tag_info instances\n"
1374"aic79xx: for installed controllers. Using defaults\n"
1375"aic79xx: Please update the aic79xx_tag_info array in\n"
1376"aic79xx: the aic79xx_osm.c source file.\n");
1377 warned_user++;
1378 }
1379 tags = AHD_MAX_QUEUE;
1380 } else {
1381 adapter_tag_info_t *tag_info;
1382
1383 tag_info = &aic79xx_tag_info[ahd->unit];
1384 tags = tag_info->tag_commands[devinfo->target_offset];
1385 if (tags > AHD_MAX_QUEUE)
1386 tags = AHD_MAX_QUEUE;
1da177e4
LT		 1387 }
1388 }
73a25462 1389 return (tags);
1da177e4
LT		 1390}
1391
1392/*
73a25462 1393 * Determines the queue depth for a given device.
1da177e4
LT		 1394 */
1395static void
73a25462 1396ahd_linux_device_queue_depth(struct scsi_device *sdev)
1da177e4 1397{
73a25462
HR		 1398 struct ahd_devinfo devinfo;
1399 u_int tags;
1400 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1da177e4 1401
73a25462
HR		 1402 ahd_compile_devinfo(&devinfo,
1403 ahd->our_id,
1404 sdev->sdev_target->id, sdev->lun,
1405 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1406 ROLE_INITIATOR);
1407 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1408 if (tags != 0 && sdev->tagged_supported != 0) {
1da177e4 1409
f89d0a4e
HR		 1410 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1411 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1412 devinfo.lun, AC_TRANSFER_NEG);
73a25462
HR		 1413 ahd_print_devinfo(ahd, &devinfo);
1414 printf("Tagged Queuing enabled. Depth %d\n", tags);
1415 } else {
f89d0a4e
HR		 1416 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1417 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1418 devinfo.lun, AC_TRANSFER_NEG);
73a25462
HR		 1419 }
1420}
1da177e4 1421
73a25462
HR		 1422static int
1423ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1424 struct scsi_cmnd *cmd)
1425{
1426 struct scb *scb;
1427 struct hardware_scb *hscb;
1428 struct ahd_initiator_tinfo *tinfo;
1429 struct ahd_tmode_tstate *tstate;
1430 u_int col_idx;
1431 uint16_t mask;
7b22da38
HR		 1432 unsigned long flags;
1433
1434 ahd_lock(ahd, &flags);
1da177e4
LT		 1435
1436 /*
73a25462 1437 * Get an scb to use.
1da177e4 1438 */
73a25462
HR		 1439 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1440 cmd->device->id, &tstate);
1441 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1442 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1443 col_idx = AHD_NEVER_COL_IDX;
1444 } else {
1445 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1446 cmd->device->lun);
1447 }
1448 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1449 ahd->flags |= AHD_RESOURCE_SHORTAGE;
7b22da38 1450 ahd_unlock(ahd, &flags);
73a25462 1451 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1452 }
1da177e4 1453
73a25462
HR		 1454 scb->io_ctx = cmd;
1455 scb->platform_data->dev = dev;
1456 hscb = scb->hscb;
1457 cmd->host_scribble = (char *)scb;
1da177e4 1458
73a25462
HR		 1459 /*
1460 * Fill out basics of the HSCB.
1461 */
1462 hscb->control = 0;
1463 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1464 hscb->lun = cmd->device->lun;
1465 scb->hscb->task_management = 0;
1466 mask = SCB_GET_TARGET_MASK(ahd, scb);
1da177e4 1467
73a25462
HR		 1468 if ((ahd->user_discenable & mask) != 0)
1469 hscb->control |= DISCENB;
1da177e4 1470
73a25462
HR		 1471 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1472 scb->flags |= SCB_PACKETIZED;
1da177e4 1473
73a25462
HR		 1474 if ((tstate->auto_negotiate & mask) != 0) {
1475 scb->flags |= SCB_AUTO_NEGOTIATE;
1476 scb->hscb->control |= MK_MESSAGE;
1477 }
1478
1479 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1480 int msg_bytes;
1481 uint8_t tag_msgs[2];
1482
1483 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1484 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1485 hscb->control |= tag_msgs[0];
1486 if (tag_msgs[0] == MSG_ORDERED_TASK)
1487 dev->commands_since_idle_or_otag = 0;
1488 } else
1489 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1490 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1491 hscb->control |= MSG_ORDERED_TASK;
1492 dev->commands_since_idle_or_otag = 0;
1493 } else {
1494 hscb->control |= MSG_SIMPLE_TASK;
1da177e4 1495 }
73a25462 1496 }
1da177e4 1497
73a25462
HR		 1498 hscb->cdb_len = cmd->cmd_len;
1499 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1500
1501 scb->platform_data->xfer_len = 0;
1502 ahd_set_residual(scb, 0);
1503 ahd_set_sense_residual(scb, 0);
1504 scb->sg_count = 0;
1505 if (cmd->use_sg != 0) {
1506 void *sg;
1507 struct scatterlist *cur_seg;
1508 u_int nseg;
1509 int dir;
1510
1511 cur_seg = (struct scatterlist *)cmd->request_buffer;
1512 dir = cmd->sc_data_direction;
1513 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1514 cmd->use_sg, dir);
1515 scb->platform_data->xfer_len = 0;
1516 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1517 dma_addr_t addr;
1518 bus_size_t len;
1519
1520 addr = sg_dma_address(cur_seg);
1521 len = sg_dma_len(cur_seg);
1522 scb->platform_data->xfer_len += len;
1523 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1524 /*last*/nseg == 1);
1da177e4 1525 }
73a25462
HR		 1526 } else if (cmd->request_bufflen != 0) {
1527 void *sg;
1528 dma_addr_t addr;
1529 int dir;
1530
1531 sg = scb->sg_list;
1532 dir = cmd->sc_data_direction;
1533 addr = pci_map_single(ahd->dev_softc,
1534 cmd->request_buffer,
1535 cmd->request_bufflen, dir);
1536 scb->platform_data->xfer_len = cmd->request_bufflen;
1537 scb->platform_data->buf_busaddr = addr;
1538 sg = ahd_sg_setup(ahd, scb, sg, addr,
1539 cmd->request_bufflen, /*last*/TRUE);
1da177e4 1540 }
73a25462
HR		 1541
1542 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1543 dev->openings--;
1544 dev->active++;
1545 dev->commands_issued++;
1546
1547 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1548 dev->commands_since_idle_or_otag++;
1549 scb->flags |= SCB_ACTIVE;
1550 ahd_queue_scb(ahd, scb);
1551
7b22da38
HR		 1552 ahd_unlock(ahd, &flags);
1553
73a25462 1554 return 0;
1da177e4
LT		 1555}
1556
73a25462
HR		 1557/*
1558 * SCSI controller interrupt handler.
1559 */
1560irqreturn_t
7d12e780 1561ahd_linux_isr(int irq, void *dev_id)
1da177e4 1562{
73a25462
HR		 1563 struct ahd_softc *ahd;
1564 u_long flags;
1565 int ours;
1da177e4 1566
73a25462
HR		 1567 ahd = (struct ahd_softc *) dev_id;
1568 ahd_lock(ahd, &flags);
1569 ours = ahd_intr(ahd);
1570 ahd_unlock(ahd, &flags);
1571 return IRQ_RETVAL(ours);
1da177e4
LT		 1572}
1573
1da177e4 1574void
73a25462 1575ahd_send_async(struct ahd_softc *ahd, char channel,
f89d0a4e 1576 u_int target, u_int lun, ac_code code)
1da177e4 1577{
73a25462
HR		 1578 switch (code) {
1579 case AC_TRANSFER_NEG:
1580 {
1581 char buf[80];
1582 struct scsi_target *starget;
73a25462
HR		 1583 struct info_str info;
1584 struct ahd_initiator_tinfo *tinfo;
1585 struct ahd_tmode_tstate *tstate;
1586 unsigned int target_ppr_options;
1da177e4 1587
73a25462
HR		 1588 BUG_ON(target == CAM_TARGET_WILDCARD);
1589
1590 info.buffer = buf;
1591 info.length = sizeof(buf);
1592 info.offset = 0;
1593 info.pos = 0;
1594 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1595 target, &tstate);
1596
1597 /*
1598 * Don't bother reporting results while
1599 * negotiations are still pending.
1600 */
1601 if (tinfo->curr.period != tinfo->goal.period
1602 || tinfo->curr.width != tinfo->goal.width
1603 || tinfo->curr.offset != tinfo->goal.offset
1604 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1605 if (bootverbose == 0)
1606 break;
1607
1608 /*
1609 * Don't bother reporting results that
1610 * are identical to those last reported.
1611 */
1612 starget = ahd->platform_data->starget[target];
fc789a93 1613 if (starget == NULL)
73a25462
HR		 1614 break;
1615
1616 target_ppr_options =
1617 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1618 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
3f40d7d6
JB		 1619 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1620 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1621 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1622 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
88ff29a4
JB		 1623 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1624 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
73a25462
HR		 1625
1626 if (tinfo->curr.period == spi_period(starget)
1627 && tinfo->curr.width == spi_width(starget)
1628 && tinfo->curr.offset == spi_offset(starget)
1629 && tinfo->curr.ppr_options == target_ppr_options)
1630 if (bootverbose == 0)
1631 break;
1632
1633 spi_period(starget) = tinfo->curr.period;
1634 spi_width(starget) = tinfo->curr.width;
1635 spi_offset(starget) = tinfo->curr.offset;
a4b53a11
HR		 1636 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1637 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1638 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
3f40d7d6
JB		 1639 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1640 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1641 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1642 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
88ff29a4 1643 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
73a25462 1644 spi_display_xfer_agreement(starget);
1da177e4 1645 break;
73a25462
HR		 1646 }
1647 case AC_SENT_BDR:
1648 {
1649 WARN_ON(lun != CAM_LUN_WILDCARD);
1650 scsi_report_device_reset(ahd->platform_data->host,
1651 channel - 'A', target);
1da177e4
LT		 1652 break;
1653 }
73a25462
HR		 1654 case AC_BUS_RESET:
1655 if (ahd->platform_data->host != NULL) {
1656 scsi_report_bus_reset(ahd->platform_data->host,
1657 channel - 'A');
1da177e4 1658 }
73a25462
HR		 1659 break;
1660 default:
1661 panic("ahd_send_async: Unexpected async event");
1662 }
1da177e4
LT		 1663}
1664
73a25462
HR		 1665/*
1666 * Calls the higher level scsi done function and frees the scb.
1667 */
1668void
1669ahd_done(struct ahd_softc *ahd, struct scb *scb)
1da177e4 1670{
73a25462
HR		 1671 struct scsi_cmnd *cmd;
1672 struct ahd_linux_device *dev;
1da177e4 1673
73a25462
HR		 1674 if ((scb->flags & SCB_ACTIVE) == 0) {
1675 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1676 ahd_dump_card_state(ahd);
1677 panic("Stopping for safety");
1da177e4 1678 }
73a25462
HR		 1679 LIST_REMOVE(scb, pending_links);
1680 cmd = scb->io_ctx;
1681 dev = scb->platform_data->dev;
1682 dev->active--;
1683 dev->openings++;
1684 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1685 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1686 dev->qfrozen--;
1687 }
1688 ahd_linux_unmap_scb(ahd, scb);
1da177e4
LT		 1689
1690 /*
73a25462
HR		 1691 * Guard against stale sense data.
1692 * The Linux mid-layer assumes that sense
1693 * was retrieved anytime the first byte of
1694 * the sense buffer looks "sane".
1da177e4 1695 */
73a25462
HR		 1696 cmd->sense_buffer[0] = 0;
1697 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1698 uint32_t amount_xferred;
1da177e4 1699
73a25462
HR		 1700 amount_xferred =
1701 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1702 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1da177e4 1703#ifdef AHD_DEBUG
73a25462
HR		 1704 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1705 ahd_print_path(ahd, scb);
1706 printf("Set CAM_UNCOR_PARITY\n");
1707 }
1da177e4 1708#endif
73a25462
HR		 1709 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1710#ifdef AHD_REPORT_UNDERFLOWS
1da177e4 1711 /*
73a25462
HR		 1712 * This code is disabled by default as some
1713 * clients of the SCSI system do not properly
1714 * initialize the underflow parameter. This
1715 * results in spurious termination of commands
1716 * that complete as expected (e.g. underflow is
1717 * allowed as command can return variable amounts
1718 * of data.
1da177e4 1719 */
73a25462
HR		 1720 } else if (amount_xferred < scb->io_ctx->underflow) {
1721 u_int i;
1da177e4 1722
73a25462
HR		 1723 ahd_print_path(ahd, scb);
1724 printf("CDB:");
1725 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1726 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1727 printf("\n");
1728 ahd_print_path(ahd, scb);
1729 printf("Saw underflow (%ld of %ld bytes). "
1730 "Treated as error\n",
1731 ahd_get_residual(scb),
1732 ahd_get_transfer_length(scb));
1733 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1734#endif
1735 } else {
1736 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1da177e4 1737 }
73a25462
HR		 1738 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1739 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1740 }
1da177e4 1741
73a25462
HR		 1742 if (dev->openings == 1
1743 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1744 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1745 dev->tag_success_count++;
1746 /*
1747 * Some devices deal with temporary internal resource
1748 * shortages by returning queue full. When the queue
1749 * full occurrs, we throttle back. Slowly try to get
1750 * back to our previous queue depth.
1751 */
1752 if ((dev->openings + dev->active) < dev->maxtags
1753 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1754 dev->tag_success_count = 0;
1755 dev->openings++;
1756 }
1da177e4 1757
73a25462
HR		 1758 if (dev->active == 0)
1759 dev->commands_since_idle_or_otag = 0;
1da177e4 1760
73a25462
HR		 1761 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1762 printf("Recovery SCB completes\n");
1763 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1764 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1765 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
7b22da38
HR		 1766
1767 if (ahd->platform_data->eh_done)
1768 complete(ahd->platform_data->eh_done);
1da177e4 1769 }
73a25462
HR		 1770
1771 ahd_free_scb(ahd, scb);
1772 ahd_linux_queue_cmd_complete(ahd, cmd);
1da177e4
LT		 1773}
1774
1775static void
73a25462
HR		 1776ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1777 struct scsi_device *sdev, struct scb *scb)
1da177e4 1778{
73a25462
HR		 1779 struct ahd_devinfo devinfo;
1780 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1da177e4 1781
73a25462
HR		 1782 ahd_compile_devinfo(&devinfo,
1783 ahd->our_id,
1784 sdev->sdev_target->id, sdev->lun,
1785 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1786 ROLE_INITIATOR);
1787
1788 /*
1789 * We don't currently trust the mid-layer to
1790 * properly deal with queue full or busy. So,
1791 * when one occurs, we tell the mid-layer to
1792 * unconditionally requeue the command to us
1793 * so that we can retry it ourselves. We also
1794 * implement our own throttling mechanism so
1795 * we don't clobber the device with too many
1796 * commands.
1797 */
1798 switch (ahd_get_scsi_status(scb)) {
1799 default:
1800 break;
1801 case SCSI_STATUS_CHECK_COND:
1802 case SCSI_STATUS_CMD_TERMINATED:
1803 {
1804 struct scsi_cmnd *cmd;
1da177e4
LT		 1805
1806 /*
73a25462
HR		 1807 * Copy sense information to the OS's cmd
1808 * structure if it is available.
1da177e4 1809 */
73a25462
HR		 1810 cmd = scb->io_ctx;
1811 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1812 struct scsi_status_iu_header *siu;
1813 u_int sense_size;
1814 u_int sense_offset;
1da177e4 1815
73a25462 1816 if (scb->flags & SCB_SENSE) {
6d07cb71 1817 sense_size = min(sizeof(struct scsi_sense_data)
73a25462 1818 - ahd_get_sense_residual(scb),
6d07cb71 1819 (u_long)sizeof(cmd->sense_buffer));
73a25462
HR		 1820 sense_offset = 0;
1821 } else {
1822 /*
1823 * Copy only the sense data into the provided
1824 * buffer.
1825 */
1826 siu = (struct scsi_status_iu_header *)
1827 scb->sense_data;
6d07cb71
AL		 1828 sense_size = min_t(size_t,
1829 scsi_4btoul(siu->sense_length),
73a25462
HR		 1830 sizeof(cmd->sense_buffer));
1831 sense_offset = SIU_SENSE_OFFSET(siu);
1832 }
1da177e4 1833
73a25462
HR		 1834 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1835 memcpy(cmd->sense_buffer,
1836 ahd_get_sense_buf(ahd, scb)
1837 + sense_offset, sense_size);
1838 cmd->result |= (DRIVER_SENSE << 24);
1da177e4 1839
1da177e4 1840#ifdef AHD_DEBUG
73a25462
HR		 1841 if (ahd_debug & AHD_SHOW_SENSE) {
1842 int i;
1da177e4 1843
73a25462
HR		 1844 printf("Copied %d bytes of sense data at %d:",
1845 sense_size, sense_offset);
1846 for (i = 0; i < sense_size; i++) {
1da177e4 1847 if ((i & 0xF) == 0)
73a25462
HR		 1848 printf("\n");
1849 printf("0x%x ", cmd->sense_buffer[i]);
1da177e4
LT		 1850 }
1851 printf("\n");
1852 }
1853#endif
1da177e4
LT		 1854 }
1855 break;
73a25462
HR		 1856 }
1857 case SCSI_STATUS_QUEUE_FULL:
1858 /*
1859 * By the time the core driver has returned this
1860 * command, all other commands that were queued
1861 * to us but not the device have been returned.
1862 * This ensures that dev->active is equal to
1863 * the number of commands actually queued to
1864 * the device.
1865 */
1866 dev->tag_success_count = 0;
1867 if (dev->active != 0) {
1da177e4 1868 /*
73a25462
HR		 1869 * Drop our opening count to the number
1870 * of commands currently outstanding.
1da177e4 1871 */
73a25462 1872 dev->openings = 0;
1da177e4 1873#ifdef AHD_DEBUG
73a25462
HR		 1874 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1875 ahd_print_path(ahd, scb);
1876 printf("Dropping tag count to %d\n",
1877 dev->active);
1da177e4
LT		 1878 }
1879#endif
73a25462 1880 if (dev->active == dev->tags_on_last_queuefull) {
1da177e4 1881
73a25462 1882 dev->last_queuefull_same_count++;
1da177e4 1883 /*
73a25462
HR		 1884 * If we repeatedly see a queue full
1885 * at the same queue depth, this
1886 * device has a fixed number of tag
1887 * slots. Lock in this tag depth
1888 * so we stop seeing queue fulls from
1889 * this device.
1da177e4 1890 */
73a25462
HR		 1891 if (dev->last_queuefull_same_count
1892 == AHD_LOCK_TAGS_COUNT) {
1893 dev->maxtags = dev->active;
1894 ahd_print_path(ahd, scb);
1895 printf("Locking max tag count at %d\n",
1896 dev->active);
1da177e4 1897 }
73a25462
HR		 1898 } else {
1899 dev->tags_on_last_queuefull = dev->active;
1900 dev->last_queuefull_same_count = 0;
1da177e4 1901 }
73a25462
HR		 1902 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1903 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
f89d0a4e 1904 ahd_platform_set_tags(ahd, sdev, &devinfo,
73a25462
HR		 1905 (dev->flags & AHD_DEV_Q_BASIC)
1906 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1da177e4
LT		 1907 break;
1908 }
1da177e4 1909 /*
73a25462
HR		 1910 * Drop down to a single opening, and treat this
1911 * as if the target returned BUSY SCSI status.
1da177e4 1912 */
73a25462 1913 dev->openings = 1;
f89d0a4e 1914 ahd_platform_set_tags(ahd, sdev, &devinfo,
73a25462
HR		 1915 (dev->flags & AHD_DEV_Q_BASIC)
1916 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1917 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1918 }
1da177e4
LT		 1919}
1920
73a25462
HR		 1921static void
1922ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1da177e4 1923{
6902f416
HR		 1924 int status;
1925 int new_status = DID_OK;
1926 int do_fallback = 0;
1927 int scsi_status;
1928
1da177e4 1929 /*
73a25462
HR		 1930 * Map CAM error codes into Linux Error codes. We
1931 * avoid the conversion so that the DV code has the
1932 * full error information available when making
1933 * state change decisions.
1da177e4 1934 */
6902f416
HR		 1935
1936 status = ahd_cmd_get_transaction_status(cmd);
1937 switch (status) {
1938 case CAM_REQ_INPROG:
1939 case CAM_REQ_CMP:
1940 new_status = DID_OK;
1941 break;
1942 case CAM_AUTOSENSE_FAIL:
1943 new_status = DID_ERROR;
1944 /* Fallthrough */
1945 case CAM_SCSI_STATUS_ERROR:
1946 scsi_status = ahd_cmd_get_scsi_status(cmd);
1947
1948 switch(scsi_status) {
1949 case SCSI_STATUS_CMD_TERMINATED:
1950 case SCSI_STATUS_CHECK_COND:
1951 if ((cmd->result >> 24) != DRIVER_SENSE) {
1952 do_fallback = 1;
1953 } else {
1954 struct scsi_sense_data *sense;
1955
1956 sense = (struct scsi_sense_data *)
1957 &cmd->sense_buffer;
1958 if (sense->extra_len >= 5 &&
1959 (sense->add_sense_code == 0x47
1960 || sense->add_sense_code == 0x48))
1961 do_fallback = 1;
1962 }
73a25462
HR		 1963 break;
1964 default:
73a25462
HR		 1965 break;
1966 }
6902f416
HR		 1967 break;
1968 case CAM_REQ_ABORTED:
1969 new_status = DID_ABORT;
1970 break;
1971 case CAM_BUSY:
1972 new_status = DID_BUS_BUSY;
1973 break;
1974 case CAM_REQ_INVALID:
1975 case CAM_PATH_INVALID:
1976 new_status = DID_BAD_TARGET;
1977 break;
1978 case CAM_SEL_TIMEOUT:
1979 new_status = DID_NO_CONNECT;
1980 break;
1981 case CAM_SCSI_BUS_RESET:
1982 case CAM_BDR_SENT:
1983 new_status = DID_RESET;
1984 break;
1985 case CAM_UNCOR_PARITY:
1986 new_status = DID_PARITY;
1987 do_fallback = 1;
1988 break;
1989 case CAM_CMD_TIMEOUT:
1990 new_status = DID_TIME_OUT;
1991 do_fallback = 1;
1992 break;
1993 case CAM_REQ_CMP_ERR:
1994 case CAM_UNEXP_BUSFREE:
1995 case CAM_DATA_RUN_ERR:
1996 new_status = DID_ERROR;
1997 do_fallback = 1;
1998 break;
1999 case CAM_UA_ABORT:
2000 case CAM_NO_HBA:
2001 case CAM_SEQUENCE_FAIL:
2002 case CAM_CCB_LEN_ERR:
2003 case CAM_PROVIDE_FAIL:
2004 case CAM_REQ_TERMIO:
2005 case CAM_UNREC_HBA_ERROR:
2006 case CAM_REQ_TOO_BIG:
2007 new_status = DID_ERROR;
2008 break;
2009 case CAM_REQUEUE_REQ:
2010 new_status = DID_REQUEUE;
2011 break;
2012 default:
2013 /* We should never get here */
2014 new_status = DID_ERROR;
2015 break;
2016 }
73a25462 2017
6902f416
HR		 2018 if (do_fallback) {
2019 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2020 ahd_name(ahd), status, cmd->device->channel,
2021 cmd->device->id, cmd->device->lun);
73a25462
HR		 2022 }
2023
6902f416
HR		 2024 ahd_cmd_set_transaction_status(cmd, new_status);
2025
73a25462 2026 cmd->scsi_done(cmd);
1da177e4
LT		 2027}
2028
1da177e4 2029void
73a25462 2030ahd_freeze_simq(struct ahd_softc *ahd)
1da177e4 2031{
7b22da38 2032 scsi_block_requests(ahd->platform_data->host);
1da177e4
LT		 2033}
2034
1da177e4 2035void
73a25462 2036ahd_release_simq(struct ahd_softc *ahd)
1da177e4 2037{
7b22da38 2038 scsi_unblock_requests(ahd->platform_data->host);
73a25462 2039}
1da177e4 2040
73a25462 2041static int
6902f416 2042ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
73a25462
HR		 2043{
2044 struct ahd_softc *ahd;
2045 struct ahd_linux_device *dev;
2046 struct scb *pending_scb;
2047 u_int saved_scbptr;
2048 u_int active_scbptr;
2049 u_int last_phase;
2050 u_int saved_scsiid;
2051 u_int cdb_byte;
2052 int retval;
2053 int was_paused;
2054 int paused;
2055 int wait;
2056 int disconnected;
2057 ahd_mode_state saved_modes;
4065a413 2058 unsigned long flags;
73a25462
HR		 2059
2060 pending_scb = NULL;
2061 paused = FALSE;
2062 wait = FALSE;
2063 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2064
017560fc 2065 scmd_printk(KERN_INFO, cmd,
6902f416 2066 "Attempting to queue an ABORT message:");
73a25462
HR		 2067
2068 printf("CDB:");
2069 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2070 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2071 printf("\n");
2072
4065a413 2073 ahd_lock(ahd, &flags);
1da177e4 2074
1da177e4 2075 /*
73a25462
HR		 2076 * First determine if we currently own this command.
2077 * Start by searching the device queue. If not found
2078 * there, check the pending_scb list. If not found
2079 * at all, and the system wanted us to just abort the
2080 * command, return success.
1da177e4 2081 */
73a25462
HR		 2082 dev = scsi_transport_device_data(cmd->device);
2083
2084 if (dev == NULL) {
2085 /*
2086 * No target device for this command exists,
2087 * so we must not still own the command.
2088 */
017560fc 2089 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
73a25462
HR		 2090 retval = SUCCESS;
2091 goto no_cmd;
2092 }
1da177e4 2093
1da177e4 2094 /*
73a25462 2095 * See if we can find a matching cmd in the pending list.
1da177e4 2096 */
73a25462
HR		 2097 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2098 if (pending_scb->io_ctx == cmd)
2099 break;
1da177e4
LT		 2100 }
2101
73a25462 2102 if (pending_scb == NULL) {
017560fc 2103 scmd_printk(KERN_INFO, cmd, "Command not found\n");
73a25462 2104 goto no_cmd;
1da177e4 2105 }
1da177e4 2106
73a25462
HR		 2107 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2108 /*
2109 * We can't queue two recovery actions using the same SCB
2110 */
2111 retval = FAILED;
2112 goto done;
2113 }
1da177e4 2114
1da177e4 2115 /*
73a25462
HR		 2116 * Ensure that the card doesn't do anything
2117 * behind our back. Also make sure that we
2118 * didn't "just" miss an interrupt that would
2119 * affect this cmd.
1da177e4 2120 */
73a25462
HR		 2121 was_paused = ahd_is_paused(ahd);
2122 ahd_pause_and_flushwork(ahd);
2123 paused = TRUE;
1da177e4 2124
73a25462 2125 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
017560fc 2126 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
73a25462
HR		 2127 goto no_cmd;
2128 }
1da177e4 2129
73a25462
HR		 2130 printf("%s: At time of recovery, card was %spaused\n",
2131 ahd_name(ahd), was_paused ? "" : "not ");
2132 ahd_dump_card_state(ahd);
1da177e4 2133
73a25462 2134 disconnected = TRUE;
6902f416
HR		 2135 if (ahd_search_qinfifo(ahd, cmd->device->id,
2136 cmd->device->channel + 'A',
2137 cmd->device->lun,
2138 pending_scb->hscb->tag,
2139 ROLE_INITIATOR, CAM_REQ_ABORTED,
2140 SEARCH_COMPLETE) > 0) {
2141 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2142 ahd_name(ahd), cmd->device->channel,
2143 cmd->device->id, cmd->device->lun);
2144 retval = SUCCESS;
2145 goto done;
73a25462 2146 }
1da177e4 2147
73a25462
HR		 2148 saved_modes = ahd_save_modes(ahd);
2149 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2150 last_phase = ahd_inb(ahd, LASTPHASE);
2151 saved_scbptr = ahd_get_scbptr(ahd);
2152 active_scbptr = saved_scbptr;
6902f416 2153 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
73a25462 2154 struct scb *bus_scb;
1da177e4 2155
73a25462
HR		 2156 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2157 if (bus_scb == pending_scb)
2158 disconnected = FALSE;
1da177e4 2159 }
73a25462
HR		 2160
2161 /*
2162 * At this point, pending_scb is the scb associated with the
2163 * passed in command. That command is currently active on the
2164 * bus or is in the disconnected state.
2165 */
2166 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
6902f416
HR		 2167 if (last_phase != P_BUSFREE
2168 && SCB_GET_TAG(pending_scb) == active_scbptr) {
73a25462 2169
1da177e4 2170 /*
73a25462
HR		 2171 * We're active on the bus, so assert ATN
2172 * and hope that the target responds.
1da177e4 2173 */
73a25462 2174 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
6902f416 2175 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
73a25462
HR		 2176 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2177 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
6902f416 2178 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
73a25462
HR		 2179 wait = TRUE;
2180 } else if (disconnected) {
2181
2182 /*
2183 * Actually re-queue this SCB in an attempt
2184 * to select the device before it reconnects.
2185 */
6902f416 2186 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
73a25462
HR		 2187 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2188 pending_scb->hscb->cdb_len = 0;
2189 pending_scb->hscb->task_attribute = 0;
2190 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2191
2192 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
1da177e4 2193 /*
73a25462
HR		 2194 * Mark the SCB has having an outstanding
2195 * task management function. Should the command
2196 * complete normally before the task management
2197 * function can be sent, the host will be notified
2198 * to abort our requeued SCB.
1da177e4 2199 */
73a25462
HR		 2200 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2201 pending_scb->hscb->task_management);
2202 } else {
2203 /*
2204 * If non-packetized, set the MK_MESSAGE control
2205 * bit indicating that we desire to send a message.
2206 * We also set the disconnected flag since there is
2207 * no guarantee that our SCB control byte matches
2208 * the version on the card. We don't want the
2209 * sequencer to abort the command thinking an
2210 * unsolicited reselection occurred.
2211 */
2212 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2213
2214 /*
2215 * The sequencer will never re-reference the
2216 * in-core SCB. To make sure we are notified
2217 * during reslection, set the MK_MESSAGE flag in
2218 * the card's copy of the SCB.
2219 */
2220 ahd_outb(ahd, SCB_CONTROL,
2221 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
1da177e4 2222 }
73a25462 2223
1da177e4 2224 /*
73a25462
HR		 2225 * Clear out any entries in the QINFIFO first
2226 * so we are the next SCB for this target
2227 * to run.
1da177e4 2228 */
73a25462
HR		 2229 ahd_search_qinfifo(ahd, cmd->device->id,
2230 cmd->device->channel + 'A', cmd->device->lun,
2231 SCB_LIST_NULL, ROLE_INITIATOR,
2232 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2233 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2234 ahd_set_scbptr(ahd, saved_scbptr);
2235 ahd_print_path(ahd, pending_scb);
2236 printf("Device is disconnected, re-queuing SCB\n");
2237 wait = TRUE;
2238 } else {
017560fc 2239 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
73a25462
HR		 2240 retval = FAILED;
2241 goto done;
1da177e4 2242 }
1da177e4 2243
73a25462 2244no_cmd:
1da177e4 2245 /*
73a25462
HR		 2246 * Our assumption is that if we don't have the command, no
2247 * recovery action was required, so we return success. Again,
2248 * the semantics of the mid-layer recovery engine are not
2249 * well defined, so this may change in time.
1da177e4 2250 */
73a25462
HR		 2251 retval = SUCCESS;
2252done:
2253 if (paused)
2254 ahd_unpause(ahd);
2255 if (wait) {
6e9a4738 2256 DECLARE_COMPLETION_ONSTACK(done);
1da177e4 2257
7b22da38 2258 ahd->platform_data->eh_done = &done;
4065a413
CH		 2259 ahd_unlock(ahd, &flags);
2260
11668bb6 2261 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
7b22da38
HR		 2262 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2263 ahd_lock(ahd, &flags);
2264 ahd->platform_data->eh_done = NULL;
2265 ahd_unlock(ahd, &flags);
11668bb6
HR		 2266 printf("%s: Timer Expired (active %d)\n",
2267 ahd_name(ahd), dev->active);
73a25462 2268 retval = FAILED;
1da177e4 2269 }
7b22da38 2270 printf("Recovery code awake\n");
eb221849
HR		 2271 } else
2272 ahd_unlock(ahd, &flags);
2273
7b22da38
HR		 2274 if (retval != SUCCESS)
2275 printf("%s: Command abort returning 0x%x\n",
2276 ahd_name(ahd), retval);
2277
2278 return retval;
1da177e4
LT		 2279}
2280
73a25462 2281static void ahd_linux_set_width(struct scsi_target *starget, int width)
1da177e4 2282{
73a25462
HR		 2283 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2284 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2285 struct ahd_devinfo devinfo;
2286 unsigned long flags;
1da177e4 2287
73a25462
HR		 2288 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2289 starget->channel + 'A', ROLE_INITIATOR);
2290 ahd_lock(ahd, &flags);
2291 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2292 ahd_unlock(ahd, &flags);
2293}
2294
2295static void ahd_linux_set_period(struct scsi_target *starget, int period)
2296{
2297 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2298 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2299 struct ahd_tmode_tstate *tstate;
2300 struct ahd_initiator_tinfo *tinfo
2301 = ahd_fetch_transinfo(ahd,
2302 starget->channel + 'A',
2303 shost->this_id, starget->id, &tstate);
2304 struct ahd_devinfo devinfo;
2305 unsigned int ppr_options = tinfo->goal.ppr_options;
a4b53a11 2306 unsigned int dt;
73a25462
HR		 2307 unsigned long flags;
2308 unsigned long offset = tinfo->goal.offset;
1da177e4 2309
a4b53a11
HR		 2310#ifdef AHD_DEBUG
2311 if ((ahd_debug & AHD_SHOW_DV) != 0)
2312 printf("%s: set period to %d\n", ahd_name(ahd), period);
2313#endif
73a25462
HR		 2314 if (offset == 0)
2315 offset = MAX_OFFSET;
1da177e4 2316
73a25462
HR		 2317 if (period < 8)
2318 period = 8;
2319 if (period < 10) {
2320 ppr_options |= MSG_EXT_PPR_DT_REQ;
2321 if (period == 8)
2322 ppr_options |= MSG_EXT_PPR_IU_REQ;
1da177e4
LT		 2323 }
2324
a4b53a11
HR		 2325 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2326
73a25462
HR		 2327 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2328 starget->channel + 'A', ROLE_INITIATOR);
1da177e4 2329
73a25462
HR		 2330 /* all PPR requests apart from QAS require wide transfers */
2331 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2332 if (spi_width(starget) == 0)
2333 ppr_options &= MSG_EXT_PPR_QAS_REQ;
1da177e4 2334 }
73a25462 2335
a4b53a11
HR		 2336 ahd_find_syncrate(ahd, &period, &ppr_options,
2337 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2338
73a25462
HR		 2339 ahd_lock(ahd, &flags);
2340 ahd_set_syncrate(ahd, &devinfo, period, offset,
2341 ppr_options, AHD_TRANS_GOAL, FALSE);
2342 ahd_unlock(ahd, &flags);
1da177e4
LT		 2343}
2344
73a25462 2345static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
1da177e4 2346{
73a25462
HR		 2347 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2348 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2349 struct ahd_tmode_tstate *tstate;
2350 struct ahd_initiator_tinfo *tinfo
2351 = ahd_fetch_transinfo(ahd,
2352 starget->channel + 'A',
2353 shost->this_id, starget->id, &tstate);
2354 struct ahd_devinfo devinfo;
2355 unsigned int ppr_options = 0;
2356 unsigned int period = 0;
a4b53a11 2357 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2358 unsigned long flags;
2359
a4b53a11
HR		 2360#ifdef AHD_DEBUG
2361 if ((ahd_debug & AHD_SHOW_DV) != 0)
2362 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2363#endif
2364
73a25462
HR		 2365 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2366 starget->channel + 'A', ROLE_INITIATOR);
2367 if (offset != 0) {
2368 period = tinfo->goal.period;
2369 ppr_options = tinfo->goal.ppr_options;
a4b53a11
HR		 2370 ahd_find_syncrate(ahd, &period, &ppr_options,
2371 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
1da177e4 2372 }
a4b53a11 2373
73a25462
HR		 2374 ahd_lock(ahd, &flags);
2375 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2376 AHD_TRANS_GOAL, FALSE);
2377 ahd_unlock(ahd, &flags);
1da177e4
LT		 2378}
2379
73a25462 2380static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
1da177e4 2381{
73a25462
HR		 2382 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2383 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2384 struct ahd_tmode_tstate *tstate;
2385 struct ahd_initiator_tinfo *tinfo
2386 = ahd_fetch_transinfo(ahd,
2387 starget->channel + 'A',
2388 shost->this_id, starget->id, &tstate);
2389 struct ahd_devinfo devinfo;
2390 unsigned int ppr_options = tinfo->goal.ppr_options
2391 & ~MSG_EXT_PPR_DT_REQ;
2392 unsigned int period = tinfo->goal.period;
52b5cfb3 2393 unsigned int width = tinfo->goal.width;
73a25462
HR		 2394 unsigned long flags;
2395
a4b53a11
HR		 2396#ifdef AHD_DEBUG
2397 if ((ahd_debug & AHD_SHOW_DV) != 0)
2398 printf("%s: %s DT\n", ahd_name(ahd),
2399 dt ? "enabling" : "disabling");
2400#endif
73a25462
HR		 2401 if (dt) {
2402 ppr_options |= MSG_EXT_PPR_DT_REQ;
52b5cfb3
HR		 2403 if (!width)
2404 ahd_linux_set_width(starget, 1);
a4b53a11
HR		 2405 } else {
2406 if (period <= 9)
2407 period = 10; /* If resetting DT, period must be >= 25ns */
2408 /* IU is invalid without DT set */
2409 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2410 }
73a25462
HR		 2411 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2412 starget->channel + 'A', ROLE_INITIATOR);
2413 ahd_find_syncrate(ahd, &period, &ppr_options,
2414 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2415
73a25462
HR		 2416 ahd_lock(ahd, &flags);
2417 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2418 ppr_options, AHD_TRANS_GOAL, FALSE);
2419 ahd_unlock(ahd, &flags);
1da177e4
LT		 2420}
2421
73a25462 2422static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
1da177e4 2423{
73a25462
HR		 2424 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2425 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2426 struct ahd_tmode_tstate *tstate;
2427 struct ahd_initiator_tinfo *tinfo
2428 = ahd_fetch_transinfo(ahd,
2429 starget->channel + 'A',
2430 shost->this_id, starget->id, &tstate);
2431 struct ahd_devinfo devinfo;
2432 unsigned int ppr_options = tinfo->goal.ppr_options
2433 & ~MSG_EXT_PPR_QAS_REQ;
2434 unsigned int period = tinfo->goal.period;
a4b53a11 2435 unsigned int dt;
73a25462
HR		 2436 unsigned long flags;
2437
a4b53a11
HR		 2438#ifdef AHD_DEBUG
2439 if ((ahd_debug & AHD_SHOW_DV) != 0)
2440 printf("%s: %s QAS\n", ahd_name(ahd),
2441 qas ? "enabling" : "disabling");
2442#endif
2443
2444 if (qas) {
2445 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2446 }
2447
2448 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2449
2450 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2451 starget->channel + 'A', ROLE_INITIATOR);
2452 ahd_find_syncrate(ahd, &period, &ppr_options,
2453 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2454
73a25462
HR		 2455 ahd_lock(ahd, &flags);
2456 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2457 ppr_options, AHD_TRANS_GOAL, FALSE);
2458 ahd_unlock(ahd, &flags);
1da177e4
LT		 2459}
2460
73a25462 2461static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
1da177e4 2462{
73a25462
HR		 2463 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2464 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2465 struct ahd_tmode_tstate *tstate;
2466 struct ahd_initiator_tinfo *tinfo
2467 = ahd_fetch_transinfo(ahd,
2468 starget->channel + 'A',
2469 shost->this_id, starget->id, &tstate);
2470 struct ahd_devinfo devinfo;
2471 unsigned int ppr_options = tinfo->goal.ppr_options
2472 & ~MSG_EXT_PPR_IU_REQ;
2473 unsigned int period = tinfo->goal.period;
a4b53a11 2474 unsigned int dt;
73a25462
HR		 2475 unsigned long flags;
2476
a4b53a11
HR		 2477#ifdef AHD_DEBUG
2478 if ((ahd_debug & AHD_SHOW_DV) != 0)
2479 printf("%s: %s IU\n", ahd_name(ahd),
2480 iu ? "enabling" : "disabling");
2481#endif
2482
2483 if (iu) {
73a25462 2484 ppr_options |= MSG_EXT_PPR_IU_REQ;
a4b53a11
HR		 2485 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2486 }
2487
2488 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2489
2490 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2491 starget->channel + 'A', ROLE_INITIATOR);
2492 ahd_find_syncrate(ahd, &period, &ppr_options,
2493 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2494
73a25462
HR		 2495 ahd_lock(ahd, &flags);
2496 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2497 ppr_options, AHD_TRANS_GOAL, FALSE);
2498 ahd_unlock(ahd, &flags);
2499}
1da177e4 2500
73a25462
HR		 2501static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2502{
2503 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2504 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2505 struct ahd_tmode_tstate *tstate;
2506 struct ahd_initiator_tinfo *tinfo
2507 = ahd_fetch_transinfo(ahd,
2508 starget->channel + 'A',
2509 shost->this_id, starget->id, &tstate);
2510 struct ahd_devinfo devinfo;
2511 unsigned int ppr_options = tinfo->goal.ppr_options
2512 & ~MSG_EXT_PPR_RD_STRM;
2513 unsigned int period = tinfo->goal.period;
2514 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2515 unsigned long flags;
2516
a4b53a11
HR		 2517#ifdef AHD_DEBUG
2518 if ((ahd_debug & AHD_SHOW_DV) != 0)
2519 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2520 rdstrm ? "enabling" : "disabling");
2521#endif
2522
73a25462
HR		 2523 if (rdstrm)
2524 ppr_options |= MSG_EXT_PPR_RD_STRM;
2525
2526 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2527 starget->channel + 'A', ROLE_INITIATOR);
2528 ahd_find_syncrate(ahd, &period, &ppr_options,
2529 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2530
a4b53a11
HR		 2531 ahd_lock(ahd, &flags);
2532 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2533 ppr_options, AHD_TRANS_GOAL, FALSE);
2534 ahd_unlock(ahd, &flags);
2535}
2536
2537static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2538{
2539 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2540 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2541 struct ahd_tmode_tstate *tstate;
2542 struct ahd_initiator_tinfo *tinfo
2543 = ahd_fetch_transinfo(ahd,
2544 starget->channel + 'A',
2545 shost->this_id, starget->id, &tstate);
2546 struct ahd_devinfo devinfo;
2547 unsigned int ppr_options = tinfo->goal.ppr_options
2548 & ~MSG_EXT_PPR_WR_FLOW;
2549 unsigned int period = tinfo->goal.period;
2550 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2551 unsigned long flags;
2552
2553#ifdef AHD_DEBUG
2554 if ((ahd_debug & AHD_SHOW_DV) != 0)
2555 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2556 wrflow ? "enabling" : "disabling");
2557#endif
2558
2559 if (wrflow)
2560 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2561
2562 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2563 starget->channel + 'A', ROLE_INITIATOR);
2564 ahd_find_syncrate(ahd, &period, &ppr_options,
2565 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2566
a4b53a11
HR		 2567 ahd_lock(ahd, &flags);
2568 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2569 ppr_options, AHD_TRANS_GOAL, FALSE);
2570 ahd_unlock(ahd, &flags);
2571}
2572
2573static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2574{
2575 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2576 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2577 struct ahd_tmode_tstate *tstate;
2578 struct ahd_initiator_tinfo *tinfo
2579 = ahd_fetch_transinfo(ahd,
2580 starget->channel + 'A',
2581 shost->this_id, starget->id, &tstate);
2582 struct ahd_devinfo devinfo;
2583 unsigned int ppr_options = tinfo->goal.ppr_options
2584 & ~MSG_EXT_PPR_RTI;
2585 unsigned int period = tinfo->goal.period;
2586 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2587 unsigned long flags;
2588
2589 if ((ahd->features & AHD_RTI) == 0) {
2590#ifdef AHD_DEBUG
2591 if ((ahd_debug & AHD_SHOW_DV) != 0)
2592 printf("%s: RTI not available\n", ahd_name(ahd));
2593#endif
2594 return;
2595 }
2596
2597#ifdef AHD_DEBUG
2598 if ((ahd_debug & AHD_SHOW_DV) != 0)
2599 printf("%s: %s RTI\n", ahd_name(ahd),
2600 rti ? "enabling" : "disabling");
2601#endif
2602
2603 if (rti)
2604 ppr_options |= MSG_EXT_PPR_RTI;
2605
2606 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2607 starget->channel + 'A', ROLE_INITIATOR);
2608 ahd_find_syncrate(ahd, &period, &ppr_options,
2609 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2610
a4b53a11
HR		 2611 ahd_lock(ahd, &flags);
2612 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2613 ppr_options, AHD_TRANS_GOAL, FALSE);
2614 ahd_unlock(ahd, &flags);
2615}
2616
2617static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2618{
2619 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2620 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2621 struct ahd_tmode_tstate *tstate;
2622 struct ahd_initiator_tinfo *tinfo
2623 = ahd_fetch_transinfo(ahd,
2624 starget->channel + 'A',
2625 shost->this_id, starget->id, &tstate);
2626 struct ahd_devinfo devinfo;
2627 unsigned int ppr_options = tinfo->goal.ppr_options
2628 & ~MSG_EXT_PPR_PCOMP_EN;
2629 unsigned int period = tinfo->goal.period;
2630 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2631 unsigned long flags;
2632
2633#ifdef AHD_DEBUG
2634 if ((ahd_debug & AHD_SHOW_DV) != 0)
2635 printf("%s: %s Precompensation\n", ahd_name(ahd),
2636 pcomp ? "Enable" : "Disable");
2637#endif
2638
2639 if (pcomp)
2640 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2641
2642 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2643 starget->channel + 'A', ROLE_INITIATOR);
2644 ahd_find_syncrate(ahd, &period, &ppr_options,
2645 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2646
73a25462
HR		 2647 ahd_lock(ahd, &flags);
2648 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2649 ppr_options, AHD_TRANS_GOAL, FALSE);
2650 ahd_unlock(ahd, &flags);
1da177e4
LT		 2651}
2652
88ff29a4
JB		 2653static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2654{
2655 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2656 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2657 struct ahd_tmode_tstate *tstate;
2658 struct ahd_initiator_tinfo *tinfo
2659 = ahd_fetch_transinfo(ahd,
2660 starget->channel + 'A',
2661 shost->this_id, starget->id, &tstate);
2662 struct ahd_devinfo devinfo;
2663 unsigned int ppr_options = tinfo->goal.ppr_options
2664 & ~MSG_EXT_PPR_HOLD_MCS;
2665 unsigned int period = tinfo->goal.period;
2666 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2667 unsigned long flags;
2668
2669 if (hold)
2670 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2671
2672 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2673 starget->channel + 'A', ROLE_INITIATOR);
2674 ahd_find_syncrate(ahd, &period, &ppr_options,
2675 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2676
2677 ahd_lock(ahd, &flags);
2678 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2679 ppr_options, AHD_TRANS_GOAL, FALSE);
2680 ahd_unlock(ahd, &flags);
2681}
2682
2683
2684
73a25462
HR		 2685static struct spi_function_template ahd_linux_transport_functions = {
2686 .set_offset = ahd_linux_set_offset,
2687 .show_offset = 1,
2688 .set_period = ahd_linux_set_period,
2689 .show_period = 1,
2690 .set_width = ahd_linux_set_width,
2691 .show_width = 1,
2692 .set_dt = ahd_linux_set_dt,
2693 .show_dt = 1,
2694 .set_iu = ahd_linux_set_iu,
2695 .show_iu = 1,
2696 .set_qas = ahd_linux_set_qas,
2697 .show_qas = 1,
2698 .set_rd_strm = ahd_linux_set_rd_strm,
2699 .show_rd_strm = 1,
a4b53a11
HR		 2700 .set_wr_flow = ahd_linux_set_wr_flow,
2701 .show_wr_flow = 1,
2702 .set_rti = ahd_linux_set_rti,
2703 .show_rti = 1,
2704 .set_pcomp_en = ahd_linux_set_pcomp_en,
2705 .show_pcomp_en = 1,
88ff29a4
JB		 2706 .set_hold_mcs = ahd_linux_set_hold_mcs,
2707 .show_hold_mcs = 1,
73a25462
HR		 2708};
2709
1da177e4
LT		 2710static int __init
2711ahd_linux_init(void)
2712{
85a46523
CH		 2713 int error = 0;
2714
2715 /*
2716 * If we've been passed any parameters, process them now.
2717 */
2718 if (aic79xx)
2719 aic79xx_setup(aic79xx);
2720
2721 ahd_linux_transport_template =
2722 spi_attach_transport(&ahd_linux_transport_functions);
73a25462
HR		 2723 if (!ahd_linux_transport_template)
2724 return -ENODEV;
85a46523 2725
73a25462
HR		 2726 scsi_transport_reserve_device(ahd_linux_transport_template,
2727 sizeof(struct ahd_linux_device));
a80b3424 2728
85a46523
CH		 2729 error = ahd_linux_pci_init();
2730 if (error)
2731 spi_release_transport(ahd_linux_transport_template);
2732 return error;
1da177e4
LT		 2733}
2734
2735static void __exit
2736ahd_linux_exit(void)
2737{
1da177e4 2738 ahd_linux_pci_exit();
73a25462 2739 spi_release_transport(ahd_linux_transport_template);
1da177e4
LT		 2740}
2741
2742module_init(ahd_linux_init);
2743module_exit(ahd_linux_exit);
Linux 6.x block layer and io_uring tree(s)