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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 */
289fe5b1 296static uint32_t aic79xx_periodic_otag;
1da177e4 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
64624d4f
HR		 318MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
319MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
1da177e4
LT		 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"
b1c11812 328" no_reset Suppress initial bus resets\n"
1da177e4
LT		 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);
e3e0ca51
AB		 366static void ahd_freeze_simq(struct ahd_softc *ahd);
367static void ahd_release_simq(struct ahd_softc *ahd);
85a46523
CH		 368
369static int ahd_linux_unit;
370
1da177e4 371
be0d6768
DV		 372/************************** OS Utility Wrappers *******************************/
373void ahd_delay(long);
374void
375ahd_delay(long usec)
376{
377 /*
378 * udelay on Linux can have problems for
379 * multi-millisecond waits. Wait at most
380 * 1024us per call.
381 */
382 while (usec > 0) {
383 udelay(usec % 1024);
384 usec -= 1024;
385 }
386}
387
388
389/***************************** Low Level I/O **********************************/
390uint8_t ahd_inb(struct ahd_softc * ahd, long port);
391uint16_t ahd_inw_atomic(struct ahd_softc * ahd, long port);
392void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
393void ahd_outw_atomic(struct ahd_softc * ahd,
394 long port, uint16_t val);
395void ahd_outsb(struct ahd_softc * ahd, long port,
396 uint8_t *, int count);
397void ahd_insb(struct ahd_softc * ahd, long port,
398 uint8_t *, int count);
399
400uint8_t
401ahd_inb(struct ahd_softc * ahd, long port)
402{
403 uint8_t x;
404
405 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
406 x = readb(ahd->bshs[0].maddr + port);
407 } else {
408 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
409 }
410 mb();
411 return (x);
412}
413
414uint16_t
415ahd_inw_atomic(struct ahd_softc * ahd, long port)
416{
417 uint8_t x;
418
419 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
420 x = readw(ahd->bshs[0].maddr + port);
421 } else {
422 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
423 }
424 mb();
425 return (x);
426}
427
428void
429ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
430{
431 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
432 writeb(val, ahd->bshs[0].maddr + port);
433 } else {
434 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
435 }
436 mb();
437}
438
439void
440ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
441{
442 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
443 writew(val, ahd->bshs[0].maddr + port);
444 } else {
445 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
446 }
447 mb();
448}
449
450void
451ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
452{
453 int i;
454
455 /*
456 * There is probably a more efficient way to do this on Linux
457 * but we don't use this for anything speed critical and this
458 * should work.
459 */
460 for (i = 0; i < count; i++)
461 ahd_outb(ahd, port, *array++);
462}
463
464void
465ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
466{
467 int i;
468
469 /*
470 * There is probably a more efficient way to do this on Linux
471 * but we don't use this for anything speed critical and this
472 * should work.
473 */
474 for (i = 0; i < count; i++)
475 *array++ = ahd_inb(ahd, port);
476}
477
478/******************************* PCI Routines *********************************/
479uint32_t
480ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
481{
482 switch (width) {
483 case 1:
484 {
485 uint8_t retval;
486
487 pci_read_config_byte(pci, reg, &retval);
488 return (retval);
489 }
490 case 2:
491 {
492 uint16_t retval;
493 pci_read_config_word(pci, reg, &retval);
494 return (retval);
495 }
496 case 4:
497 {
498 uint32_t retval;
499 pci_read_config_dword(pci, reg, &retval);
500 return (retval);
501 }
502 default:
503 panic("ahd_pci_read_config: Read size too big");
504 /* NOTREACHED */
505 return (0);
506 }
507}
508
509void
510ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
511{
512 switch (width) {
513 case 1:
514 pci_write_config_byte(pci, reg, value);
515 break;
516 case 2:
517 pci_write_config_word(pci, reg, value);
518 break;
519 case 4:
520 pci_write_config_dword(pci, reg, value);
521 break;
522 default:
523 panic("ahd_pci_write_config: Write size too big");
524 /* NOTREACHED */
525 }
526}
527
1da177e4 528/****************************** Inlines ***************************************/
be0d6768 529static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
1da177e4 530
be0d6768 531static void
1da177e4
LT		 532ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
533{
73a25462 534 struct scsi_cmnd *cmd;
1da177e4
LT		 535
536 cmd = scb->io_ctx;
1da177e4 537 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
4c688fc7 538 scsi_dma_unmap(cmd);
1da177e4
LT		 539}
540
541/******************************** Macros **************************************/
542#define BUILD_SCSIID(ahd, cmd) \
422c0d61 543 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
1da177e4 544
1da177e4
LT		 545/*
546 * Return a string describing the driver.
547 */
548static const char *
549ahd_linux_info(struct Scsi_Host *host)
550{
551 static char buffer[512];
552 char ahd_info[256];
553 char *bp;
554 struct ahd_softc *ahd;
555
556 bp = &buffer[0];
557 ahd = *(struct ahd_softc **)host->hostdata;
558 memset(bp, 0, sizeof(buffer));
559 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
560 strcat(bp, AIC79XX_DRIVER_VERSION);
561 strcat(bp, "\n");
562 strcat(bp, " <");
563 strcat(bp, ahd->description);
564 strcat(bp, ">\n");
565 strcat(bp, " ");
566 ahd_controller_info(ahd, ahd_info);
567 strcat(bp, ahd_info);
1da177e4
LT		 568
569 return (bp);
570}
571
572/*
573 * Queue an SCB to the controller.
574 */
575static int
73a25462 576ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
1da177e4
LT		 577{
578 struct ahd_softc *ahd;
73a25462 579 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
4065a413 580 int rtn = SCSI_MLQUEUE_HOST_BUSY;
1da177e4
LT		 581
582 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
583
7b22da38
HR		 584 cmd->scsi_done = scsi_done;
585 cmd->result = CAM_REQ_INPROG << 16;
586 rtn = ahd_linux_run_command(ahd, dev, cmd);
1da177e4 587
4065a413 588 return rtn;
1da177e4
LT		 589}
590
be0d6768 591static struct scsi_target **
73a25462
HR		 592ahd_linux_target_in_softc(struct scsi_target *starget)
593{
594 struct ahd_softc *ahd =
595 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
596 unsigned int target_offset;
597
598 target_offset = starget->id;
599 if (starget->channel != 0)
600 target_offset += 8;
601
602 return &ahd->platform_data->starget[target_offset];
603}
604
1da177e4 605static int
73a25462 606ahd_linux_target_alloc(struct scsi_target *starget)
1da177e4 607{
73a25462
HR		 608 struct ahd_softc *ahd =
609 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
986a25f9 610 struct seeprom_config *sc = ahd->seep_config;
73a25462
HR		 611 unsigned long flags;
612 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
73a25462
HR		 613 struct ahd_devinfo devinfo;
614 struct ahd_initiator_tinfo *tinfo;
615 struct ahd_tmode_tstate *tstate;
616 char channel = starget->channel + 'A';
1da177e4 617
73a25462
HR		 618 ahd_lock(ahd, &flags);
619
620 BUG_ON(*ahd_targp != NULL);
621
622 *ahd_targp = starget;
73a25462 623
986a25f9
HR		 624 if (sc) {
625 int flags = sc->device_flags[starget->id];
626
627 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
628 starget->id, &tstate);
629
630 if ((flags & CFPACKETIZED) == 0) {
631 /* Do not negotiate packetized transfers */
632 spi_rd_strm(starget) = 0;
633 spi_pcomp_en(starget) = 0;
634 spi_rti(starget) = 0;
635 spi_wr_flow(starget) = 0;
636 spi_hold_mcs(starget) = 0;
637 } else {
638 if ((ahd->features & AHD_RTI) == 0)
639 spi_rti(starget) = 0;
640 }
641
642 if ((flags & CFQAS) == 0)
643 spi_qas(starget) = 0;
644
645 /* Transinfo values have been set to BIOS settings */
646 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
647 spi_min_period(starget) = tinfo->user.period;
648 spi_max_offset(starget) = tinfo->user.offset;
649 }
650
73a25462
HR		 651 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
652 starget->id, &tstate);
653 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
654 CAM_LUN_WILDCARD, channel,
655 ROLE_INITIATOR);
73a25462
HR		 656 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
657 AHD_TRANS_GOAL, /*paused*/FALSE);
658 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
659 AHD_TRANS_GOAL, /*paused*/FALSE);
660 ahd_unlock(ahd, &flags);
661
662 return 0;
663}
664
665static void
666ahd_linux_target_destroy(struct scsi_target *starget)
667{
668 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
669
670 *ahd_targp = NULL;
1da177e4
LT		 671}
672
673static int
73a25462 674ahd_linux_slave_alloc(struct scsi_device *sdev)
1da177e4 675{
73a25462
HR		 676 struct ahd_softc *ahd =
677 *((struct ahd_softc **)sdev->host->hostdata);
73a25462 678 struct ahd_linux_device *dev;
1da177e4 679
1da177e4 680 if (bootverbose)
73a25462
HR		 681 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
682
73a25462
HR		 683 dev = scsi_transport_device_data(sdev);
684 memset(dev, 0, sizeof(*dev));
685
686 /*
687 * We start out life using untagged
688 * transactions of which we allow one.
689 */
690 dev->openings = 1;
691
1da177e4 692 /*
73a25462
HR		 693 * Set maxtags to 0. This will be changed if we
694 * later determine that we are dealing with
695 * a tagged queuing capable device.
1da177e4 696 */
73a25462
HR		 697 dev->maxtags = 0;
698
1da177e4
LT		 699 return (0);
700}
701
73a25462
HR		 702static int
703ahd_linux_slave_configure(struct scsi_device *sdev)
704{
705 struct ahd_softc *ahd;
706
707 ahd = *((struct ahd_softc **)sdev->host->hostdata);
708 if (bootverbose)
017560fc 709 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
73a25462
HR		 710
711 ahd_linux_device_queue_depth(sdev);
712
713 /* Initial Domain Validation */
714 if (!spi_initial_dv(sdev->sdev_target))
715 spi_dv_device(sdev);
716
717 return 0;
718}
719
1da177e4
LT		 720#if defined(__i386__)
721/*
722 * Return the disk geometry for the given SCSI device.
723 */
724static int
1da177e4
LT		 725ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
726 sector_t capacity, int geom[])
727{
728 uint8_t *bh;
1da177e4
LT		 729 int heads;
730 int sectors;
731 int cylinders;
732 int ret;
733 int extended;
734 struct ahd_softc *ahd;
735
736 ahd = *((struct ahd_softc **)sdev->host->hostdata);
737
1da177e4 738 bh = scsi_bios_ptable(bdev);
1da177e4
LT		 739 if (bh) {
740 ret = scsi_partsize(bh, capacity,
741 &geom[2], &geom[0], &geom[1]);
1da177e4 742 kfree(bh);
1da177e4
LT		 743 if (ret != -1)
744 return (ret);
745 }
746 heads = 64;
747 sectors = 32;
748 cylinders = aic_sector_div(capacity, heads, sectors);
749
750 if (aic79xx_extended != 0)
751 extended = 1;
752 else
753 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
754 if (extended && cylinders >= 1024) {
755 heads = 255;
756 sectors = 63;
757 cylinders = aic_sector_div(capacity, heads, sectors);
758 }
759 geom[0] = heads;
760 geom[1] = sectors;
761 geom[2] = cylinders;
762 return (0);
763}
764#endif
765
766/*
767 * Abort the current SCSI command(s).
768 */
769static int
73a25462
HR		 770ahd_linux_abort(struct scsi_cmnd *cmd)
771{
772 int error;
6902f416
HR		 773
774 error = ahd_linux_queue_abort_cmd(cmd);
73a25462 775
73a25462
HR		 776 return error;
777}
778
779/*
780 * Attempt to send a target reset message to the device that timed out.
781 */
782static int
783ahd_linux_dev_reset(struct scsi_cmnd *cmd)
784{
6902f416
HR		 785 struct ahd_softc *ahd;
786 struct ahd_linux_device *dev;
787 struct scb *reset_scb;
788 u_int cdb_byte;
789 int retval = SUCCESS;
790 int paused;
791 int wait;
792 struct ahd_initiator_tinfo *tinfo;
793 struct ahd_tmode_tstate *tstate;
794 unsigned long flags;
6e9a4738 795 DECLARE_COMPLETION_ONSTACK(done);
73a25462 796
6902f416
HR		 797 reset_scb = NULL;
798 paused = FALSE;
799 wait = FALSE;
800 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
801
802 scmd_printk(KERN_INFO, cmd,
803 "Attempting to queue a TARGET RESET message:");
804
805 printf("CDB:");
806 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
807 printf(" 0x%x", cmd->cmnd[cdb_byte]);
808 printf("\n");
809
810 /*
811 * Determine if we currently own this command.
812 */
813 dev = scsi_transport_device_data(cmd->device);
814
815 if (dev == NULL) {
816 /*
817 * No target device for this command exists,
818 * so we must not still own the command.
819 */
820 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
821 return SUCCESS;
822 }
823
824 /*
825 * Generate us a new SCB
826 */
827 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
828 if (!reset_scb) {
829 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
830 return FAILED;
831 }
832
833 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
834 cmd->device->id, &tstate);
835 reset_scb->io_ctx = cmd;
836 reset_scb->platform_data->dev = dev;
837 reset_scb->sg_count = 0;
838 ahd_set_residual(reset_scb, 0);
839 ahd_set_sense_residual(reset_scb, 0);
840 reset_scb->platform_data->xfer_len = 0;
841 reset_scb->hscb->control = 0;
842 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
843 reset_scb->hscb->lun = cmd->device->lun;
844 reset_scb->hscb->cdb_len = 0;
845 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
846 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
847 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
848 reset_scb->flags |= SCB_PACKETIZED;
849 } else {
850 reset_scb->hscb->control |= MK_MESSAGE;
851 }
852 dev->openings--;
853 dev->active++;
854 dev->commands_issued++;
855
856 ahd_lock(ahd, &flags);
857
858 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
859 ahd_queue_scb(ahd, reset_scb);
860
861 ahd->platform_data->eh_done = &done;
862 ahd_unlock(ahd, &flags);
863
864 printf("%s: Device reset code sleeping\n", ahd_name(ahd));
865 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
866 ahd_lock(ahd, &flags);
867 ahd->platform_data->eh_done = NULL;
868 ahd_unlock(ahd, &flags);
869 printf("%s: Device reset timer expired (active %d)\n",
870 ahd_name(ahd), dev->active);
871 retval = FAILED;
872 }
873 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
874
875 return (retval);
73a25462
HR		 876}
877
878/*
879 * Reset the SCSI bus.
880 */
881static int
882ahd_linux_bus_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 883{
884 struct ahd_softc *ahd;
73a25462 885 int found;
f41b5cec 886 unsigned long flags;
1da177e4 887
1da177e4 888 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
73a25462
HR		 889#ifdef AHD_DEBUG
890 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
891 printf("%s: Bus reset called for cmd %p\n",
892 ahd_name(ahd), cmd);
893#endif
f41b5cec
HR		 894 ahd_lock(ahd, &flags);
895
422c0d61 896 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
73a25462 897 /*initiate reset*/TRUE);
f41b5cec 898 ahd_unlock(ahd, &flags);
1da177e4 899
73a25462
HR		 900 if (bootverbose)
901 printf("%s: SCSI bus reset delivered. "
902 "%d SCBs aborted.\n", ahd_name(ahd), found);
1da177e4 903
73a25462
HR		 904 return (SUCCESS);
905}
1da177e4 906
73a25462
HR		 907struct scsi_host_template aic79xx_driver_template = {
908 .module = THIS_MODULE,
909 .name = "aic79xx",
85a46523 910 .proc_name = "aic79xx",
73a25462
HR		 911 .proc_info = ahd_linux_proc_info,
912 .info = ahd_linux_info,
913 .queuecommand = ahd_linux_queue,
914 .eh_abort_handler = ahd_linux_abort,
915 .eh_device_reset_handler = ahd_linux_dev_reset,
916 .eh_bus_reset_handler = ahd_linux_bus_reset,
917#if defined(__i386__)
918 .bios_param = ahd_linux_biosparam,
919#endif
920 .can_queue = AHD_MAX_QUEUE,
921 .this_id = -1,
80f1443c 922 .max_sectors = 8192,
73a25462
HR		 923 .cmd_per_lun = 2,
924 .use_clustering = ENABLE_CLUSTERING,
925 .slave_alloc = ahd_linux_slave_alloc,
926 .slave_configure = ahd_linux_slave_configure,
73a25462
HR		 927 .target_alloc = ahd_linux_target_alloc,
928 .target_destroy = ahd_linux_target_destroy,
929};
1da177e4 930
73a25462
HR		 931/******************************** Bus DMA *************************************/
932int
933ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
934 bus_size_t alignment, bus_size_t boundary,
935 dma_addr_t lowaddr, dma_addr_t highaddr,
936 bus_dma_filter_t *filter, void *filterarg,
937 bus_size_t maxsize, int nsegments,
938 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
939{
940 bus_dma_tag_t dmat;
941
942 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
943 if (dmat == NULL)
944 return (ENOMEM);
1da177e4 945
1da177e4 946 /*
73a25462
HR		 947 * Linux is very simplistic about DMA memory. For now don't
948 * maintain all specification information. Once Linux supplies
949 * better facilities for doing these operations, or the
950 * needs of this particular driver change, we might need to do
951 * more here.
1da177e4 952 */
73a25462
HR		 953 dmat->alignment = alignment;
954 dmat->boundary = boundary;
955 dmat->maxsize = maxsize;
956 *ret_tag = dmat;
957 return (0);
958}
1da177e4 959
73a25462
HR		 960void
961ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
962{
963 free(dmat, M_DEVBUF);
964}
1da177e4 965
73a25462
HR		 966int
967ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
968 int flags, bus_dmamap_t *mapp)
969{
970 *vaddr = pci_alloc_consistent(ahd->dev_softc,
971 dmat->maxsize, mapp);
972 if (*vaddr == NULL)
973 return (ENOMEM);
974 return(0);
975}
1da177e4 976
73a25462
HR		 977void
978ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
979 void* vaddr, bus_dmamap_t map)
980{
981 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
982 vaddr, map);
983}
984
985int
986ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
987 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
988 void *cb_arg, int flags)
989{
1da177e4 990 /*
73a25462
HR		 991 * Assume for now that this will only be used during
992 * initialization and not for per-transaction buffer mapping.
1da177e4 993 */
73a25462 994 bus_dma_segment_t stack_sg;
1da177e4 995
73a25462
HR		 996 stack_sg.ds_addr = map;
997 stack_sg.ds_len = dmat->maxsize;
998 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
999 return (0);
1000}
1da177e4 1001
73a25462
HR		 1002void
1003ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1004{
1005}
1da177e4 1006
73a25462
HR		 1007int
1008ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1009{
1010 /* Nothing to do */
1011 return (0);
1012}
1da177e4 1013
73a25462 1014/********************* Platform Dependent Functions ***************************/
73a25462
HR		 1015static void
1016ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1017{
1da177e4 1018
73a25462 1019 if ((instance >= 0)
6391a113 1020 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
73a25462
HR		 1021 uint8_t *iocell_info;
1022
1023 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1024 iocell_info[index] = value & 0xFFFF;
1025 if (bootverbose)
1026 printf("iocell[%d:%ld] = %d\n", instance, index, value);
1da177e4 1027 }
73a25462 1028}
1da177e4 1029
73a25462
HR		 1030static void
1031ahd_linux_setup_tag_info_global(char *p)
1032{
1033 int tags, i, j;
1da177e4 1034
73a25462
HR		 1035 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1036 printf("Setting Global Tags= %d\n", tags);
1037
6391a113 1038 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
73a25462
HR		 1039 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1040 aic79xx_tag_info[i].tag_commands[j] = tags;
1da177e4 1041 }
1da177e4 1042 }
1da177e4
LT		 1043}
1044
1da177e4 1045static void
73a25462 1046ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1da177e4 1047{
1da177e4 1048
73a25462 1049 if ((instance >= 0) && (targ >= 0)
6391a113 1050 && (instance < ARRAY_SIZE(aic79xx_tag_info))
73a25462
HR		 1051 && (targ < AHD_NUM_TARGETS)) {
1052 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1053 if (bootverbose)
1054 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1da177e4 1055 }
1da177e4
LT		 1056}
1057
1ff92730
CH		 1058static char *
1059ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1060 void (*callback)(u_long, int, int, int32_t),
1061 u_long callback_arg)
1062{
1063 char *tok_end;
1064 char *tok_end2;
1065 int i;
1066 int instance;
1067 int targ;
1068 int done;
1069 char tok_list[] = {'.', ',', '{', '}', '\0'};
1070
1071 /* All options use a ':' name/arg separator */
1072 if (*opt_arg != ':')
1073 return (opt_arg);
1074 opt_arg++;
1075 instance = -1;
1076 targ = -1;
1077 done = FALSE;
1078 /*
1079 * Restore separator that may be in
1080 * the middle of our option argument.
1081 */
1082 tok_end = strchr(opt_arg, '\0');
1083 if (tok_end < end)
1084 *tok_end = ',';
1085 while (!done) {
1086 switch (*opt_arg) {
1087 case '{':
1088 if (instance == -1) {
1089 instance = 0;
1090 } else {
1091 if (depth > 1) {
1092 if (targ == -1)
1093 targ = 0;
1094 } else {
1095 printf("Malformed Option %s\n",
1096 opt_name);
1097 done = TRUE;
1098 }
1099 }
1100 opt_arg++;
1101 break;
1102 case '}':
1103 if (targ != -1)
1104 targ = -1;
1105 else if (instance != -1)
1106 instance = -1;
1107 opt_arg++;
1108 break;
1109 case ',':
1110 case '.':
1111 if (instance == -1)
1112 done = TRUE;
1113 else if (targ >= 0)
1114 targ++;
1115 else if (instance >= 0)
1116 instance++;
1117 opt_arg++;
1118 break;
1119 case '\0':
1120 done = TRUE;
1121 break;
1122 default:
1123 tok_end = end;
1124 for (i = 0; tok_list[i]; i++) {
1125 tok_end2 = strchr(opt_arg, tok_list[i]);
1126 if ((tok_end2) && (tok_end2 < tok_end))
1127 tok_end = tok_end2;
1128 }
1129 callback(callback_arg, instance, targ,
1130 simple_strtol(opt_arg, NULL, 0));
1131 opt_arg = tok_end;
1132 break;
1133 }
1134 }
1135 return (opt_arg);
1136}
1137
1da177e4 1138/*
73a25462
HR		 1139 * Handle Linux boot parameters. This routine allows for assigning a value
1140 * to a parameter with a ':' between the parameter and the value.
1141 * ie. aic79xx=stpwlev:1,extended
1da177e4
LT		 1142 */
1143static int
73a25462 1144aic79xx_setup(char *s)
1da177e4 1145{
73a25462
HR		 1146 int i, n;
1147 char *p;
1148 char *end;
1da177e4 1149
73a25462
HR		 1150 static struct {
1151 const char *name;
1152 uint32_t *flag;
1153 } options[] = {
1154 { "extended", &aic79xx_extended },
1155 { "no_reset", &aic79xx_no_reset },
1156 { "verbose", &aic79xx_verbose },
1157 { "allow_memio", &aic79xx_allow_memio},
1da177e4 1158#ifdef AHD_DEBUG
73a25462 1159 { "debug", &ahd_debug },
1da177e4 1160#endif
73a25462
HR		 1161 { "periodic_otag", &aic79xx_periodic_otag },
1162 { "pci_parity", &aic79xx_pci_parity },
1163 { "seltime", &aic79xx_seltime },
1164 { "tag_info", NULL },
1165 { "global_tag_depth", NULL},
1166 { "slewrate", NULL },
1167 { "precomp", NULL },
1168 { "amplitude", NULL },
3fb08612 1169 { "slowcrc", &aic79xx_slowcrc },
73a25462 1170 };
1da177e4 1171
73a25462 1172 end = strchr(s, '\0');
1da177e4 1173
73a25462 1174 /*
6391a113 1175 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
73a25462 1176 * will never be 0 in this case.
6391a113
TK		 1177 */
1178 n = 0;
73a25462
HR		 1179
1180 while ((p = strsep(&s, ",.")) != NULL) {
1181 if (*p == '\0')
1182 continue;
6391a113 1183 for (i = 0; i < ARRAY_SIZE(options); i++) {
73a25462
HR		 1184
1185 n = strlen(options[i].name);
1186 if (strncmp(options[i].name, p, n) == 0)
1187 break;
1188 }
6391a113 1189 if (i == ARRAY_SIZE(options))
73a25462
HR		 1190 continue;
1191
1192 if (strncmp(p, "global_tag_depth", n) == 0) {
1193 ahd_linux_setup_tag_info_global(p + n);
1194 } else if (strncmp(p, "tag_info", n) == 0) {
1ff92730 1195 s = ahd_parse_brace_option("tag_info", p + n, end,
73a25462
HR		 1196 2, ahd_linux_setup_tag_info, 0);
1197 } else if (strncmp(p, "slewrate", n) == 0) {
1ff92730 1198 s = ahd_parse_brace_option("slewrate",
73a25462
HR		 1199 p + n, end, 1, ahd_linux_setup_iocell_info,
1200 AIC79XX_SLEWRATE_INDEX);
1201 } else if (strncmp(p, "precomp", n) == 0) {
1ff92730 1202 s = ahd_parse_brace_option("precomp",
73a25462
HR		 1203 p + n, end, 1, ahd_linux_setup_iocell_info,
1204 AIC79XX_PRECOMP_INDEX);
1205 } else if (strncmp(p, "amplitude", n) == 0) {
1ff92730 1206 s = ahd_parse_brace_option("amplitude",
73a25462
HR		 1207 p + n, end, 1, ahd_linux_setup_iocell_info,
1208 AIC79XX_AMPLITUDE_INDEX);
1209 } else if (p[n] == ':') {
1210 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1211 } else if (!strncmp(p, "verbose", n)) {
1212 *(options[i].flag) = 1;
1213 } else {
1214 *(options[i].flag) ^= 0xFFFFFFFF;
1215 }
1216 }
1217 return 1;
1da177e4
LT		 1218}
1219
73a25462
HR		 1220__setup("aic79xx=", aic79xx_setup);
1221
1222uint32_t aic79xx_verbose;
1da177e4 1223
1da177e4 1224int
73a25462 1225ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1da177e4 1226{
73a25462
HR		 1227 char buf[80];
1228 struct Scsi_Host *host;
1229 char *new_name;
1230 u_long s;
e7a1ca1d 1231 int retval;
1da177e4 1232
73a25462
HR		 1233 template->name = ahd->description;
1234 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1235 if (host == NULL)
1da177e4
LT		 1236 return (ENOMEM);
1237
73a25462 1238 *((struct ahd_softc **)host->hostdata) = ahd;
73a25462
HR		 1239 ahd->platform_data->host = host;
1240 host->can_queue = AHD_MAX_QUEUE;
1241 host->cmd_per_lun = 2;
1242 host->sg_tablesize = AHD_NSEG;
1243 host->this_id = ahd->our_id;
1244 host->irq = ahd->platform_data->irq;
1245 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1246 host->max_lun = AHD_NUM_LUNS;
1247 host->max_channel = 0;
1248 host->sg_tablesize = AHD_NSEG;
eb221849 1249 ahd_lock(ahd, &s);
85a46523 1250 ahd_set_unit(ahd, ahd_linux_unit++);
eb221849 1251 ahd_unlock(ahd, &s);
73a25462
HR		 1252 sprintf(buf, "scsi%d", host->host_no);
1253 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1254 if (new_name != NULL) {
1255 strcpy(new_name, buf);
1256 ahd_set_name(ahd, new_name);
1257 }
1258 host->unique_id = ahd->unit;
1259 ahd_linux_initialize_scsi_bus(ahd);
1260 ahd_intr_enable(ahd, TRUE);
73a25462
HR		 1261
1262 host->transportt = ahd_linux_transport_template;
1263
e7a1ca1d
JJ		 1264 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1265 if (retval) {
1266 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1267 scsi_host_put(host);
1268 return retval;
1269 }
1270
73a25462 1271 scsi_scan_host(host);
e7a1ca1d 1272 return 0;
1da177e4
LT		 1273}
1274
73a25462
HR		 1275/*
1276 * Place the SCSI bus into a known state by either resetting it,
1277 * or forcing transfer negotiations on the next command to any
1278 * target.
1279 */
1280static void
1281ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1da177e4 1282{
73a25462
HR		 1283 u_int target_id;
1284 u_int numtarg;
eb221849 1285 unsigned long s;
1da177e4 1286
73a25462
HR		 1287 target_id = 0;
1288 numtarg = 0;
1289
1290 if (aic79xx_no_reset != 0)
1291 ahd->flags &= ~AHD_RESET_BUS_A;
1292
1293 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1294 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1295 else
1296 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1da177e4 1297
eb221849
HR		 1298 ahd_lock(ahd, &s);
1299
1da177e4 1300 /*
73a25462
HR		 1301 * Force negotiation to async for all targets that
1302 * will not see an initial bus reset.
1da177e4 1303 */
73a25462
HR		 1304 for (; target_id < numtarg; target_id++) {
1305 struct ahd_devinfo devinfo;
1306 struct ahd_initiator_tinfo *tinfo;
1307 struct ahd_tmode_tstate *tstate;
1308
1309 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1310 target_id, &tstate);
1311 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1312 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1313 ahd_update_neg_request(ahd, &devinfo, tstate,
1314 tinfo, AHD_NEG_ALWAYS);
1315 }
eb221849 1316 ahd_unlock(ahd, &s);
73a25462
HR		 1317 /* Give the bus some time to recover */
1318 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1319 ahd_freeze_simq(ahd);
eb221849
HR		 1320 msleep(AIC79XX_RESET_DELAY);
1321 ahd_release_simq(ahd);
73a25462 1322 }
1da177e4
LT		 1323}
1324
1325int
73a25462 1326ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1da177e4 1327{
73a25462
HR		 1328 ahd->platform_data =
1329 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1330 if (ahd->platform_data == NULL)
1331 return (ENOMEM);
1332 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1333 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1334 ahd_lockinit(ahd);
73a25462 1335 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1da177e4
LT		 1336 return (0);
1337}
1338
73a25462
HR		 1339void
1340ahd_platform_free(struct ahd_softc *ahd)
1da177e4 1341{
73a25462 1342 struct scsi_target *starget;
f89d0a4e 1343 int i;
1da177e4 1344
73a25462 1345 if (ahd->platform_data != NULL) {
73a25462
HR		 1346 /* destroy all of the device and target objects */
1347 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1348 starget = ahd->platform_data->starget[i];
1349 if (starget != NULL) {
73a25462
HR		 1350 ahd->platform_data->starget[i] = NULL;
1351 }
1352 }
1da177e4 1353
73a25462
HR		 1354 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1355 free_irq(ahd->platform_data->irq, ahd);
1356 if (ahd->tags[0] == BUS_SPACE_PIO
1357 && ahd->bshs[0].ioport != 0)
1358 release_region(ahd->bshs[0].ioport, 256);
1359 if (ahd->tags[1] == BUS_SPACE_PIO
1360 && ahd->bshs[1].ioport != 0)
1361 release_region(ahd->bshs[1].ioport, 256);
1362 if (ahd->tags[0] == BUS_SPACE_MEMIO
1363 && ahd->bshs[0].maddr != NULL) {
1364 iounmap(ahd->bshs[0].maddr);
1365 release_mem_region(ahd->platform_data->mem_busaddr,
1366 0x1000);
1367 }
97af50f6
JB		 1368 if (ahd->platform_data->host)
1369 scsi_host_put(ahd->platform_data->host);
1370
73a25462
HR		 1371 free(ahd->platform_data, M_DEVBUF);
1372 }
1da177e4
LT		 1373}
1374
73a25462
HR		 1375void
1376ahd_platform_init(struct ahd_softc *ahd)
1da177e4 1377{
73a25462
HR		 1378 /*
1379 * Lookup and commit any modified IO Cell options.
1380 */
6391a113 1381 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
73a25462 1382 struct ahd_linux_iocell_opts *iocell_opts;
1da177e4 1383
73a25462
HR		 1384 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1385 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1386 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1387 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1388 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1389 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1390 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1da177e4 1391 }
1da177e4 1392
1da177e4
LT		 1393}
1394
73a25462
HR		 1395void
1396ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1da177e4 1397{
73a25462
HR		 1398 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1399 SCB_GET_CHANNEL(ahd, scb),
1400 SCB_GET_LUN(scb), SCB_LIST_NULL,
1401 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1da177e4
LT		 1402}
1403
73a25462 1404void
f89d0a4e
HR		 1405ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1406 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1da177e4 1407{
73a25462 1408 struct ahd_linux_device *dev;
73a25462
HR		 1409 int was_queuing;
1410 int now_queuing;
1da177e4 1411
73a25462
HR		 1412 if (sdev == NULL)
1413 return;
1da177e4 1414
73a25462 1415 dev = scsi_transport_device_data(sdev);
1da177e4 1416
73a25462
HR		 1417 if (dev == NULL)
1418 return;
1419 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1420 switch (alg) {
1421 default:
1422 case AHD_QUEUE_NONE:
1423 now_queuing = 0;
1424 break;
1425 case AHD_QUEUE_BASIC:
1426 now_queuing = AHD_DEV_Q_BASIC;
1427 break;
1428 case AHD_QUEUE_TAGGED:
1429 now_queuing = AHD_DEV_Q_TAGGED;
1430 break;
1431 }
1432 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1433 && (was_queuing != now_queuing)
1434 && (dev->active != 0)) {
1435 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1436 dev->qfrozen++;
1da177e4 1437 }
1da177e4 1438
73a25462
HR		 1439 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1440 if (now_queuing) {
1441 u_int usertags;
1da177e4 1442
73a25462
HR		 1443 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1444 if (!was_queuing) {
1445 /*
1446 * Start out agressively and allow our
1447 * dynamic queue depth algorithm to take
1448 * care of the rest.
1449 */
1450 dev->maxtags = usertags;
1451 dev->openings = dev->maxtags - dev->active;
1da177e4 1452 }
73a25462
HR		 1453 if (dev->maxtags == 0) {
1454 /*
1455 * Queueing is disabled by the user.
1456 */
1457 dev->openings = 1;
1458 } else if (alg == AHD_QUEUE_TAGGED) {
1459 dev->flags |= AHD_DEV_Q_TAGGED;
1460 if (aic79xx_periodic_otag != 0)
1461 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1462 } else
1463 dev->flags |= AHD_DEV_Q_BASIC;
1464 } else {
1465 /* We can only have one opening. */
1466 dev->maxtags = 0;
1467 dev->openings = 1 - dev->active;
1da177e4 1468 }
1da177e4 1469
73a25462
HR		 1470 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1471 case AHD_DEV_Q_BASIC:
0aa800db
HR		 1472 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1473 scsi_activate_tcq(sdev, dev->openings + dev->active);
73a25462
HR		 1474 break;
1475 case AHD_DEV_Q_TAGGED:
0aa800db
HR		 1476 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1477 scsi_activate_tcq(sdev, dev->openings + dev->active);
73a25462
HR		 1478 break;
1479 default:
1da177e4 1480 /*
73a25462
HR		 1481 * We allow the OS to queue 2 untagged transactions to
1482 * us at any time even though we can only execute them
1483 * serially on the controller/device. This should
1484 * remove some latency.
1da177e4 1485 */
0aa800db 1486 scsi_deactivate_tcq(sdev, 1);
73a25462 1487 break;
1da177e4 1488 }
1da177e4
LT		 1489}
1490
73a25462
HR		 1491int
1492ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1493 int lun, u_int tag, role_t role, uint32_t status)
1da177e4 1494{
73a25462 1495 return 0;
1da177e4
LT		 1496}
1497
73a25462
HR		 1498static u_int
1499ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1da177e4 1500{
73a25462
HR		 1501 static int warned_user;
1502 u_int tags;
1da177e4 1503
73a25462
HR		 1504 tags = 0;
1505 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
6391a113 1506 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
73a25462
HR		 1507
1508 if (warned_user == 0) {
1509 printf(KERN_WARNING
1510"aic79xx: WARNING: Insufficient tag_info instances\n"
1511"aic79xx: for installed controllers. Using defaults\n"
1512"aic79xx: Please update the aic79xx_tag_info array in\n"
1513"aic79xx: the aic79xx_osm.c source file.\n");
1514 warned_user++;
1515 }
1516 tags = AHD_MAX_QUEUE;
1517 } else {
1518 adapter_tag_info_t *tag_info;
1519
1520 tag_info = &aic79xx_tag_info[ahd->unit];
1521 tags = tag_info->tag_commands[devinfo->target_offset];
1522 if (tags > AHD_MAX_QUEUE)
1523 tags = AHD_MAX_QUEUE;
1da177e4
LT		 1524 }
1525 }
73a25462 1526 return (tags);
1da177e4
LT		 1527}
1528
1529/*
73a25462 1530 * Determines the queue depth for a given device.
1da177e4
LT		 1531 */
1532static void
73a25462 1533ahd_linux_device_queue_depth(struct scsi_device *sdev)
1da177e4 1534{
73a25462
HR		 1535 struct ahd_devinfo devinfo;
1536 u_int tags;
1537 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1da177e4 1538
73a25462
HR		 1539 ahd_compile_devinfo(&devinfo,
1540 ahd->our_id,
1541 sdev->sdev_target->id, sdev->lun,
1542 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1543 ROLE_INITIATOR);
1544 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1545 if (tags != 0 && sdev->tagged_supported != 0) {
1da177e4 1546
f89d0a4e
HR		 1547 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1548 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1549 devinfo.lun, AC_TRANSFER_NEG);
73a25462
HR		 1550 ahd_print_devinfo(ahd, &devinfo);
1551 printf("Tagged Queuing enabled. Depth %d\n", tags);
1552 } else {
f89d0a4e
HR		 1553 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1554 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1555 devinfo.lun, AC_TRANSFER_NEG);
73a25462
HR		 1556 }
1557}
1da177e4 1558
73a25462
HR		 1559static int
1560ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1561 struct scsi_cmnd *cmd)
1562{
1563 struct scb *scb;
1564 struct hardware_scb *hscb;
1565 struct ahd_initiator_tinfo *tinfo;
1566 struct ahd_tmode_tstate *tstate;
1567 u_int col_idx;
1568 uint16_t mask;
7b22da38 1569 unsigned long flags;
4c688fc7 1570 int nseg;
7b22da38 1571
2505873a
FT		 1572 nseg = scsi_dma_map(cmd);
1573 if (nseg < 0)
1574 return SCSI_MLQUEUE_HOST_BUSY;
1575
7b22da38 1576 ahd_lock(ahd, &flags);
1da177e4
LT		 1577
1578 /*
73a25462 1579 * Get an scb to use.
1da177e4 1580 */
73a25462
HR		 1581 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1582 cmd->device->id, &tstate);
1583 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1584 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1585 col_idx = AHD_NEVER_COL_IDX;
1586 } else {
1587 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1588 cmd->device->lun);
1589 }
1590 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1591 ahd->flags |= AHD_RESOURCE_SHORTAGE;
7b22da38 1592 ahd_unlock(ahd, &flags);
2505873a 1593 scsi_dma_unmap(cmd);
73a25462 1594 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1595 }
1da177e4 1596
73a25462
HR		 1597 scb->io_ctx = cmd;
1598 scb->platform_data->dev = dev;
1599 hscb = scb->hscb;
1600 cmd->host_scribble = (char *)scb;
1da177e4 1601
73a25462
HR		 1602 /*
1603 * Fill out basics of the HSCB.
1604 */
1605 hscb->control = 0;
1606 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1607 hscb->lun = cmd->device->lun;
1608 scb->hscb->task_management = 0;
1609 mask = SCB_GET_TARGET_MASK(ahd, scb);
1da177e4 1610
73a25462
HR		 1611 if ((ahd->user_discenable & mask) != 0)
1612 hscb->control |= DISCENB;
1da177e4 1613
73a25462
HR		 1614 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1615 scb->flags |= SCB_PACKETIZED;
1da177e4 1616
73a25462
HR		 1617 if ((tstate->auto_negotiate & mask) != 0) {
1618 scb->flags |= SCB_AUTO_NEGOTIATE;
1619 scb->hscb->control |= MK_MESSAGE;
1620 }
1621
1622 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1623 int msg_bytes;
1624 uint8_t tag_msgs[2];
1625
1626 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1627 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1628 hscb->control |= tag_msgs[0];
1629 if (tag_msgs[0] == MSG_ORDERED_TASK)
1630 dev->commands_since_idle_or_otag = 0;
1631 } else
1632 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1633 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1634 hscb->control |= MSG_ORDERED_TASK;
1635 dev->commands_since_idle_or_otag = 0;
1636 } else {
1637 hscb->control |= MSG_SIMPLE_TASK;
1da177e4 1638 }
73a25462 1639 }
1da177e4 1640
73a25462
HR		 1641 hscb->cdb_len = cmd->cmd_len;
1642 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1643
1644 scb->platform_data->xfer_len = 0;
1645 ahd_set_residual(scb, 0);
1646 ahd_set_sense_residual(scb, 0);
1647 scb->sg_count = 0;
4c688fc7 1648
4c688fc7
FT		 1649 if (nseg > 0) {
1650 void *sg = scb->sg_list;
1651 struct scatterlist *cur_seg;
1652 int i;
1653
73a25462 1654 scb->platform_data->xfer_len = 0;
4c688fc7
FT		 1655
1656 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
73a25462
HR		 1657 dma_addr_t addr;
1658 bus_size_t len;
1659
1660 addr = sg_dma_address(cur_seg);
1661 len = sg_dma_len(cur_seg);
1662 scb->platform_data->xfer_len += len;
1663 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
4c688fc7 1664 i == (nseg - 1));
1da177e4 1665 }
1da177e4 1666 }
73a25462
HR		 1667
1668 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1669 dev->openings--;
1670 dev->active++;
1671 dev->commands_issued++;
1672
1673 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1674 dev->commands_since_idle_or_otag++;
1675 scb->flags |= SCB_ACTIVE;
1676 ahd_queue_scb(ahd, scb);
1677
7b22da38
HR		 1678 ahd_unlock(ahd, &flags);
1679
73a25462 1680 return 0;
1da177e4
LT		 1681}
1682
73a25462
HR		 1683/*
1684 * SCSI controller interrupt handler.
1685 */
1686irqreturn_t
7d12e780 1687ahd_linux_isr(int irq, void *dev_id)
1da177e4 1688{
73a25462
HR		 1689 struct ahd_softc *ahd;
1690 u_long flags;
1691 int ours;
1da177e4 1692
73a25462
HR		 1693 ahd = (struct ahd_softc *) dev_id;
1694 ahd_lock(ahd, &flags);
1695 ours = ahd_intr(ahd);
1696 ahd_unlock(ahd, &flags);
1697 return IRQ_RETVAL(ours);
1da177e4
LT		 1698}
1699
1da177e4 1700void
73a25462 1701ahd_send_async(struct ahd_softc *ahd, char channel,
f89d0a4e 1702 u_int target, u_int lun, ac_code code)
1da177e4 1703{
73a25462
HR		 1704 switch (code) {
1705 case AC_TRANSFER_NEG:
1706 {
1707 char buf[80];
1708 struct scsi_target *starget;
73a25462
HR		 1709 struct info_str info;
1710 struct ahd_initiator_tinfo *tinfo;
1711 struct ahd_tmode_tstate *tstate;
1712 unsigned int target_ppr_options;
1da177e4 1713
73a25462
HR		 1714 BUG_ON(target == CAM_TARGET_WILDCARD);
1715
1716 info.buffer = buf;
1717 info.length = sizeof(buf);
1718 info.offset = 0;
1719 info.pos = 0;
1720 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1721 target, &tstate);
1722
1723 /*
1724 * Don't bother reporting results while
1725 * negotiations are still pending.
1726 */
1727 if (tinfo->curr.period != tinfo->goal.period
1728 || tinfo->curr.width != tinfo->goal.width
1729 || tinfo->curr.offset != tinfo->goal.offset
1730 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1731 if (bootverbose == 0)
1732 break;
1733
1734 /*
1735 * Don't bother reporting results that
1736 * are identical to those last reported.
1737 */
1738 starget = ahd->platform_data->starget[target];
fc789a93 1739 if (starget == NULL)
73a25462
HR		 1740 break;
1741
1742 target_ppr_options =
1743 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1744 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
3f40d7d6
JB		 1745 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1746 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1747 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1748 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
88ff29a4
JB		 1749 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1750 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
73a25462
HR		 1751
1752 if (tinfo->curr.period == spi_period(starget)
1753 && tinfo->curr.width == spi_width(starget)
1754 && tinfo->curr.offset == spi_offset(starget)
1755 && tinfo->curr.ppr_options == target_ppr_options)
1756 if (bootverbose == 0)
1757 break;
1758
1759 spi_period(starget) = tinfo->curr.period;
1760 spi_width(starget) = tinfo->curr.width;
1761 spi_offset(starget) = tinfo->curr.offset;
a4b53a11
HR		 1762 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1763 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1764 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
3f40d7d6
JB		 1765 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1766 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1767 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1768 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
88ff29a4 1769 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
73a25462 1770 spi_display_xfer_agreement(starget);
1da177e4 1771 break;
73a25462
HR		 1772 }
1773 case AC_SENT_BDR:
1774 {
1775 WARN_ON(lun != CAM_LUN_WILDCARD);
1776 scsi_report_device_reset(ahd->platform_data->host,
1777 channel - 'A', target);
1da177e4
LT		 1778 break;
1779 }
73a25462
HR		 1780 case AC_BUS_RESET:
1781 if (ahd->platform_data->host != NULL) {
1782 scsi_report_bus_reset(ahd->platform_data->host,
1783 channel - 'A');
1da177e4 1784 }
73a25462
HR		 1785 break;
1786 default:
1787 panic("ahd_send_async: Unexpected async event");
1788 }
1da177e4
LT		 1789}
1790
73a25462
HR		 1791/*
1792 * Calls the higher level scsi done function and frees the scb.
1793 */
1794void
1795ahd_done(struct ahd_softc *ahd, struct scb *scb)
1da177e4 1796{
73a25462
HR		 1797 struct scsi_cmnd *cmd;
1798 struct ahd_linux_device *dev;
1da177e4 1799
73a25462
HR		 1800 if ((scb->flags & SCB_ACTIVE) == 0) {
1801 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1802 ahd_dump_card_state(ahd);
1803 panic("Stopping for safety");
1da177e4 1804 }
73a25462
HR		 1805 LIST_REMOVE(scb, pending_links);
1806 cmd = scb->io_ctx;
1807 dev = scb->platform_data->dev;
1808 dev->active--;
1809 dev->openings++;
1810 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1811 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1812 dev->qfrozen--;
1813 }
1814 ahd_linux_unmap_scb(ahd, scb);
1da177e4
LT		 1815
1816 /*
73a25462
HR		 1817 * Guard against stale sense data.
1818 * The Linux mid-layer assumes that sense
1819 * was retrieved anytime the first byte of
1820 * the sense buffer looks "sane".
1da177e4 1821 */
73a25462
HR		 1822 cmd->sense_buffer[0] = 0;
1823 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1824 uint32_t amount_xferred;
1da177e4 1825
73a25462
HR		 1826 amount_xferred =
1827 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1828 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1da177e4 1829#ifdef AHD_DEBUG
73a25462
HR		 1830 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1831 ahd_print_path(ahd, scb);
1832 printf("Set CAM_UNCOR_PARITY\n");
1833 }
1da177e4 1834#endif
73a25462
HR		 1835 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1836#ifdef AHD_REPORT_UNDERFLOWS
1da177e4 1837 /*
73a25462
HR		 1838 * This code is disabled by default as some
1839 * clients of the SCSI system do not properly
1840 * initialize the underflow parameter. This
1841 * results in spurious termination of commands
1842 * that complete as expected (e.g. underflow is
1843 * allowed as command can return variable amounts
1844 * of data.
1da177e4 1845 */
73a25462
HR		 1846 } else if (amount_xferred < scb->io_ctx->underflow) {
1847 u_int i;
1da177e4 1848
73a25462
HR		 1849 ahd_print_path(ahd, scb);
1850 printf("CDB:");
1851 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1852 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1853 printf("\n");
1854 ahd_print_path(ahd, scb);
1855 printf("Saw underflow (%ld of %ld bytes). "
1856 "Treated as error\n",
1857 ahd_get_residual(scb),
1858 ahd_get_transfer_length(scb));
1859 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1860#endif
1861 } else {
1862 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1da177e4 1863 }
73a25462
HR		 1864 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1865 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1866 }
1da177e4 1867
73a25462
HR		 1868 if (dev->openings == 1
1869 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1870 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1871 dev->tag_success_count++;
1872 /*
1873 * Some devices deal with temporary internal resource
1874 * shortages by returning queue full. When the queue
1875 * full occurrs, we throttle back. Slowly try to get
1876 * back to our previous queue depth.
1877 */
1878 if ((dev->openings + dev->active) < dev->maxtags
1879 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1880 dev->tag_success_count = 0;
1881 dev->openings++;
1882 }
1da177e4 1883
73a25462
HR		 1884 if (dev->active == 0)
1885 dev->commands_since_idle_or_otag = 0;
1da177e4 1886
73a25462
HR		 1887 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1888 printf("Recovery SCB completes\n");
1889 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1890 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1891 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
7b22da38
HR		 1892
1893 if (ahd->platform_data->eh_done)
1894 complete(ahd->platform_data->eh_done);
1da177e4 1895 }
73a25462
HR		 1896
1897 ahd_free_scb(ahd, scb);
1898 ahd_linux_queue_cmd_complete(ahd, cmd);
1da177e4
LT		 1899}
1900
1901static void
73a25462
HR		 1902ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1903 struct scsi_device *sdev, struct scb *scb)
1da177e4 1904{
73a25462
HR		 1905 struct ahd_devinfo devinfo;
1906 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1da177e4 1907
73a25462
HR		 1908 ahd_compile_devinfo(&devinfo,
1909 ahd->our_id,
1910 sdev->sdev_target->id, sdev->lun,
1911 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1912 ROLE_INITIATOR);
1913
1914 /*
1915 * We don't currently trust the mid-layer to
1916 * properly deal with queue full or busy. So,
1917 * when one occurs, we tell the mid-layer to
1918 * unconditionally requeue the command to us
1919 * so that we can retry it ourselves. We also
1920 * implement our own throttling mechanism so
1921 * we don't clobber the device with too many
1922 * commands.
1923 */
1924 switch (ahd_get_scsi_status(scb)) {
1925 default:
1926 break;
1927 case SCSI_STATUS_CHECK_COND:
1928 case SCSI_STATUS_CMD_TERMINATED:
1929 {
1930 struct scsi_cmnd *cmd;
1da177e4
LT		 1931
1932 /*
73a25462
HR		 1933 * Copy sense information to the OS's cmd
1934 * structure if it is available.
1da177e4 1935 */
73a25462
HR		 1936 cmd = scb->io_ctx;
1937 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1938 struct scsi_status_iu_header *siu;
1939 u_int sense_size;
1940 u_int sense_offset;
1da177e4 1941
73a25462 1942 if (scb->flags & SCB_SENSE) {
6d07cb71 1943 sense_size = min(sizeof(struct scsi_sense_data)
73a25462 1944 - ahd_get_sense_residual(scb),
b80ca4f7 1945 (u_long)SCSI_SENSE_BUFFERSIZE);
73a25462
HR		 1946 sense_offset = 0;
1947 } else {
1948 /*
1949 * Copy only the sense data into the provided
1950 * buffer.
1951 */
1952 siu = (struct scsi_status_iu_header *)
1953 scb->sense_data;
6d07cb71
AL		 1954 sense_size = min_t(size_t,
1955 scsi_4btoul(siu->sense_length),
b80ca4f7 1956 SCSI_SENSE_BUFFERSIZE);
73a25462
HR		 1957 sense_offset = SIU_SENSE_OFFSET(siu);
1958 }
1da177e4 1959
b80ca4f7 1960 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
73a25462
HR		 1961 memcpy(cmd->sense_buffer,
1962 ahd_get_sense_buf(ahd, scb)
1963 + sense_offset, sense_size);
1964 cmd->result |= (DRIVER_SENSE << 24);
1da177e4 1965
1da177e4 1966#ifdef AHD_DEBUG
73a25462
HR		 1967 if (ahd_debug & AHD_SHOW_SENSE) {
1968 int i;
1da177e4 1969
73a25462
HR		 1970 printf("Copied %d bytes of sense data at %d:",
1971 sense_size, sense_offset);
1972 for (i = 0; i < sense_size; i++) {
1da177e4 1973 if ((i & 0xF) == 0)
73a25462
HR		 1974 printf("\n");
1975 printf("0x%x ", cmd->sense_buffer[i]);
1da177e4
LT		 1976 }
1977 printf("\n");
1978 }
1979#endif
1da177e4
LT		 1980 }
1981 break;
73a25462
HR		 1982 }
1983 case SCSI_STATUS_QUEUE_FULL:
1984 /*
1985 * By the time the core driver has returned this
1986 * command, all other commands that were queued
1987 * to us but not the device have been returned.
1988 * This ensures that dev->active is equal to
1989 * the number of commands actually queued to
1990 * the device.
1991 */
1992 dev->tag_success_count = 0;
1993 if (dev->active != 0) {
1da177e4 1994 /*
73a25462
HR		 1995 * Drop our opening count to the number
1996 * of commands currently outstanding.
1da177e4 1997 */
73a25462 1998 dev->openings = 0;
1da177e4 1999#ifdef AHD_DEBUG
73a25462
HR		 2000 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
2001 ahd_print_path(ahd, scb);
2002 printf("Dropping tag count to %d\n",
2003 dev->active);
1da177e4
LT		 2004 }
2005#endif
73a25462 2006 if (dev->active == dev->tags_on_last_queuefull) {
1da177e4 2007
73a25462 2008 dev->last_queuefull_same_count++;
1da177e4 2009 /*
73a25462
HR		 2010 * If we repeatedly see a queue full
2011 * at the same queue depth, this
2012 * device has a fixed number of tag
2013 * slots. Lock in this tag depth
2014 * so we stop seeing queue fulls from
2015 * this device.
1da177e4 2016 */
73a25462
HR		 2017 if (dev->last_queuefull_same_count
2018 == AHD_LOCK_TAGS_COUNT) {
2019 dev->maxtags = dev->active;
2020 ahd_print_path(ahd, scb);
2021 printf("Locking max tag count at %d\n",
2022 dev->active);
1da177e4 2023 }
73a25462
HR		 2024 } else {
2025 dev->tags_on_last_queuefull = dev->active;
2026 dev->last_queuefull_same_count = 0;
1da177e4 2027 }
73a25462
HR		 2028 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2029 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
f89d0a4e 2030 ahd_platform_set_tags(ahd, sdev, &devinfo,
73a25462
HR		 2031 (dev->flags & AHD_DEV_Q_BASIC)
2032 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1da177e4
LT		 2033 break;
2034 }
1da177e4 2035 /*
73a25462
HR		 2036 * Drop down to a single opening, and treat this
2037 * as if the target returned BUSY SCSI status.
1da177e4 2038 */
73a25462 2039 dev->openings = 1;
f89d0a4e 2040 ahd_platform_set_tags(ahd, sdev, &devinfo,
73a25462
HR		 2041 (dev->flags & AHD_DEV_Q_BASIC)
2042 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2043 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2044 }
1da177e4
LT		 2045}
2046
73a25462
HR		 2047static void
2048ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1da177e4 2049{
6902f416
HR		 2050 int status;
2051 int new_status = DID_OK;
2052 int do_fallback = 0;
2053 int scsi_status;
2054
1da177e4 2055 /*
73a25462
HR		 2056 * Map CAM error codes into Linux Error codes. We
2057 * avoid the conversion so that the DV code has the
2058 * full error information available when making
2059 * state change decisions.
1da177e4 2060 */
6902f416
HR		 2061
2062 status = ahd_cmd_get_transaction_status(cmd);
2063 switch (status) {
2064 case CAM_REQ_INPROG:
2065 case CAM_REQ_CMP:
2066 new_status = DID_OK;
2067 break;
2068 case CAM_AUTOSENSE_FAIL:
2069 new_status = DID_ERROR;
2070 /* Fallthrough */
2071 case CAM_SCSI_STATUS_ERROR:
2072 scsi_status = ahd_cmd_get_scsi_status(cmd);
2073
2074 switch(scsi_status) {
2075 case SCSI_STATUS_CMD_TERMINATED:
2076 case SCSI_STATUS_CHECK_COND:
2077 if ((cmd->result >> 24) != DRIVER_SENSE) {
2078 do_fallback = 1;
2079 } else {
2080 struct scsi_sense_data *sense;
2081
2082 sense = (struct scsi_sense_data *)
c1c9ce52 2083 cmd->sense_buffer;
6902f416
HR		 2084 if (sense->extra_len >= 5 &&
2085 (sense->add_sense_code == 0x47
2086 || sense->add_sense_code == 0x48))
2087 do_fallback = 1;
2088 }
73a25462
HR		 2089 break;
2090 default:
73a25462
HR		 2091 break;
2092 }
6902f416
HR		 2093 break;
2094 case CAM_REQ_ABORTED:
2095 new_status = DID_ABORT;
2096 break;
2097 case CAM_BUSY:
2098 new_status = DID_BUS_BUSY;
2099 break;
2100 case CAM_REQ_INVALID:
2101 case CAM_PATH_INVALID:
2102 new_status = DID_BAD_TARGET;
2103 break;
2104 case CAM_SEL_TIMEOUT:
2105 new_status = DID_NO_CONNECT;
2106 break;
2107 case CAM_SCSI_BUS_RESET:
2108 case CAM_BDR_SENT:
2109 new_status = DID_RESET;
2110 break;
2111 case CAM_UNCOR_PARITY:
2112 new_status = DID_PARITY;
2113 do_fallback = 1;
2114 break;
2115 case CAM_CMD_TIMEOUT:
2116 new_status = DID_TIME_OUT;
2117 do_fallback = 1;
2118 break;
2119 case CAM_REQ_CMP_ERR:
2120 case CAM_UNEXP_BUSFREE:
2121 case CAM_DATA_RUN_ERR:
2122 new_status = DID_ERROR;
2123 do_fallback = 1;
2124 break;
2125 case CAM_UA_ABORT:
2126 case CAM_NO_HBA:
2127 case CAM_SEQUENCE_FAIL:
2128 case CAM_CCB_LEN_ERR:
2129 case CAM_PROVIDE_FAIL:
2130 case CAM_REQ_TERMIO:
2131 case CAM_UNREC_HBA_ERROR:
2132 case CAM_REQ_TOO_BIG:
2133 new_status = DID_ERROR;
2134 break;
2135 case CAM_REQUEUE_REQ:
2136 new_status = DID_REQUEUE;
2137 break;
2138 default:
2139 /* We should never get here */
2140 new_status = DID_ERROR;
2141 break;
2142 }
73a25462 2143
6902f416
HR		 2144 if (do_fallback) {
2145 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2146 ahd_name(ahd), status, cmd->device->channel,
2147 cmd->device->id, cmd->device->lun);
73a25462
HR		 2148 }
2149
6902f416
HR		 2150 ahd_cmd_set_transaction_status(cmd, new_status);
2151
73a25462 2152 cmd->scsi_done(cmd);
1da177e4
LT		 2153}
2154
e3e0ca51 2155static void
73a25462 2156ahd_freeze_simq(struct ahd_softc *ahd)
1da177e4 2157{
7b22da38 2158 scsi_block_requests(ahd->platform_data->host);
1da177e4
LT		 2159}
2160
e3e0ca51 2161static void
73a25462 2162ahd_release_simq(struct ahd_softc *ahd)
1da177e4 2163{
7b22da38 2164 scsi_unblock_requests(ahd->platform_data->host);
73a25462 2165}
1da177e4 2166
73a25462 2167static int
6902f416 2168ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
73a25462
HR		 2169{
2170 struct ahd_softc *ahd;
2171 struct ahd_linux_device *dev;
2172 struct scb *pending_scb;
2173 u_int saved_scbptr;
2174 u_int active_scbptr;
2175 u_int last_phase;
2176 u_int saved_scsiid;
2177 u_int cdb_byte;
2178 int retval;
2179 int was_paused;
2180 int paused;
2181 int wait;
2182 int disconnected;
2183 ahd_mode_state saved_modes;
4065a413 2184 unsigned long flags;
73a25462
HR		 2185
2186 pending_scb = NULL;
2187 paused = FALSE;
2188 wait = FALSE;
2189 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2190
017560fc 2191 scmd_printk(KERN_INFO, cmd,
6902f416 2192 "Attempting to queue an ABORT message:");
73a25462
HR		 2193
2194 printf("CDB:");
2195 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2196 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2197 printf("\n");
2198
4065a413 2199 ahd_lock(ahd, &flags);
1da177e4 2200
1da177e4 2201 /*
73a25462
HR		 2202 * First determine if we currently own this command.
2203 * Start by searching the device queue. If not found
2204 * there, check the pending_scb list. If not found
2205 * at all, and the system wanted us to just abort the
2206 * command, return success.
1da177e4 2207 */
73a25462
HR		 2208 dev = scsi_transport_device_data(cmd->device);
2209
2210 if (dev == NULL) {
2211 /*
2212 * No target device for this command exists,
2213 * so we must not still own the command.
2214 */
017560fc 2215 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
73a25462
HR		 2216 retval = SUCCESS;
2217 goto no_cmd;
2218 }
1da177e4 2219
1da177e4 2220 /*
73a25462 2221 * See if we can find a matching cmd in the pending list.
1da177e4 2222 */
73a25462
HR		 2223 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2224 if (pending_scb->io_ctx == cmd)
2225 break;
1da177e4
LT		 2226 }
2227
73a25462 2228 if (pending_scb == NULL) {
017560fc 2229 scmd_printk(KERN_INFO, cmd, "Command not found\n");
73a25462 2230 goto no_cmd;
1da177e4 2231 }
1da177e4 2232
73a25462
HR		 2233 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2234 /*
2235 * We can't queue two recovery actions using the same SCB
2236 */
2237 retval = FAILED;
2238 goto done;
2239 }
1da177e4 2240
1da177e4 2241 /*
73a25462
HR		 2242 * Ensure that the card doesn't do anything
2243 * behind our back. Also make sure that we
2244 * didn't "just" miss an interrupt that would
2245 * affect this cmd.
1da177e4 2246 */
73a25462
HR		 2247 was_paused = ahd_is_paused(ahd);
2248 ahd_pause_and_flushwork(ahd);
2249 paused = TRUE;
1da177e4 2250
73a25462 2251 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
017560fc 2252 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
73a25462
HR		 2253 goto no_cmd;
2254 }
1da177e4 2255
73a25462
HR		 2256 printf("%s: At time of recovery, card was %spaused\n",
2257 ahd_name(ahd), was_paused ? "" : "not ");
2258 ahd_dump_card_state(ahd);
1da177e4 2259
73a25462 2260 disconnected = TRUE;
6902f416
HR		 2261 if (ahd_search_qinfifo(ahd, cmd->device->id,
2262 cmd->device->channel + 'A',
2263 cmd->device->lun,
2264 pending_scb->hscb->tag,
2265 ROLE_INITIATOR, CAM_REQ_ABORTED,
2266 SEARCH_COMPLETE) > 0) {
2267 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2268 ahd_name(ahd), cmd->device->channel,
2269 cmd->device->id, cmd->device->lun);
2270 retval = SUCCESS;
2271 goto done;
73a25462 2272 }
1da177e4 2273
73a25462
HR		 2274 saved_modes = ahd_save_modes(ahd);
2275 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2276 last_phase = ahd_inb(ahd, LASTPHASE);
2277 saved_scbptr = ahd_get_scbptr(ahd);
2278 active_scbptr = saved_scbptr;
6902f416 2279 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
73a25462 2280 struct scb *bus_scb;
1da177e4 2281
73a25462
HR		 2282 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2283 if (bus_scb == pending_scb)
2284 disconnected = FALSE;
1da177e4 2285 }
73a25462
HR		 2286
2287 /*
2288 * At this point, pending_scb is the scb associated with the
2289 * passed in command. That command is currently active on the
2290 * bus or is in the disconnected state.
2291 */
2292 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
6902f416
HR		 2293 if (last_phase != P_BUSFREE
2294 && SCB_GET_TAG(pending_scb) == active_scbptr) {
73a25462 2295
1da177e4 2296 /*
73a25462
HR		 2297 * We're active on the bus, so assert ATN
2298 * and hope that the target responds.
1da177e4 2299 */
73a25462 2300 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
6902f416 2301 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
73a25462
HR		 2302 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2303 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
6902f416 2304 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
73a25462
HR		 2305 wait = TRUE;
2306 } else if (disconnected) {
2307
2308 /*
2309 * Actually re-queue this SCB in an attempt
2310 * to select the device before it reconnects.
2311 */
6902f416 2312 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
73a25462
HR		 2313 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2314 pending_scb->hscb->cdb_len = 0;
2315 pending_scb->hscb->task_attribute = 0;
2316 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2317
2318 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
1da177e4 2319 /*
73a25462
HR		 2320 * Mark the SCB has having an outstanding
2321 * task management function. Should the command
2322 * complete normally before the task management
2323 * function can be sent, the host will be notified
2324 * to abort our requeued SCB.
1da177e4 2325 */
73a25462
HR		 2326 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2327 pending_scb->hscb->task_management);
2328 } else {
2329 /*
2330 * If non-packetized, set the MK_MESSAGE control
2331 * bit indicating that we desire to send a message.
2332 * We also set the disconnected flag since there is
2333 * no guarantee that our SCB control byte matches
2334 * the version on the card. We don't want the
2335 * sequencer to abort the command thinking an
2336 * unsolicited reselection occurred.
2337 */
2338 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2339
2340 /*
2341 * The sequencer will never re-reference the
2342 * in-core SCB. To make sure we are notified
2343 * during reslection, set the MK_MESSAGE flag in
2344 * the card's copy of the SCB.
2345 */
2346 ahd_outb(ahd, SCB_CONTROL,
2347 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
1da177e4 2348 }
73a25462 2349
1da177e4 2350 /*
73a25462
HR		 2351 * Clear out any entries in the QINFIFO first
2352 * so we are the next SCB for this target
2353 * to run.
1da177e4 2354 */
73a25462
HR		 2355 ahd_search_qinfifo(ahd, cmd->device->id,
2356 cmd->device->channel + 'A', cmd->device->lun,
2357 SCB_LIST_NULL, ROLE_INITIATOR,
2358 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2359 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2360 ahd_set_scbptr(ahd, saved_scbptr);
2361 ahd_print_path(ahd, pending_scb);
2362 printf("Device is disconnected, re-queuing SCB\n");
2363 wait = TRUE;
2364 } else {
017560fc 2365 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
73a25462
HR		 2366 retval = FAILED;
2367 goto done;
1da177e4 2368 }
1da177e4 2369
73a25462 2370no_cmd:
1da177e4 2371 /*
73a25462
HR		 2372 * Our assumption is that if we don't have the command, no
2373 * recovery action was required, so we return success. Again,
2374 * the semantics of the mid-layer recovery engine are not
2375 * well defined, so this may change in time.
1da177e4 2376 */
73a25462
HR		 2377 retval = SUCCESS;
2378done:
2379 if (paused)
2380 ahd_unpause(ahd);
2381 if (wait) {
6e9a4738 2382 DECLARE_COMPLETION_ONSTACK(done);
1da177e4 2383
7b22da38 2384 ahd->platform_data->eh_done = &done;
4065a413
CH		 2385 ahd_unlock(ahd, &flags);
2386
11668bb6 2387 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
7b22da38
HR		 2388 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2389 ahd_lock(ahd, &flags);
2390 ahd->platform_data->eh_done = NULL;
2391 ahd_unlock(ahd, &flags);
11668bb6
HR		 2392 printf("%s: Timer Expired (active %d)\n",
2393 ahd_name(ahd), dev->active);
73a25462 2394 retval = FAILED;
1da177e4 2395 }
7b22da38 2396 printf("Recovery code awake\n");
eb221849
HR		 2397 } else
2398 ahd_unlock(ahd, &flags);
2399
7b22da38
HR		 2400 if (retval != SUCCESS)
2401 printf("%s: Command abort returning 0x%x\n",
2402 ahd_name(ahd), retval);
2403
2404 return retval;
1da177e4
LT		 2405}
2406
73a25462 2407static void ahd_linux_set_width(struct scsi_target *starget, int width)
1da177e4 2408{
73a25462
HR		 2409 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2410 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2411 struct ahd_devinfo devinfo;
2412 unsigned long flags;
1da177e4 2413
73a25462
HR		 2414 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2415 starget->channel + 'A', ROLE_INITIATOR);
2416 ahd_lock(ahd, &flags);
2417 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2418 ahd_unlock(ahd, &flags);
2419}
2420
2421static void ahd_linux_set_period(struct scsi_target *starget, int period)
2422{
2423 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2424 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2425 struct ahd_tmode_tstate *tstate;
2426 struct ahd_initiator_tinfo *tinfo
2427 = ahd_fetch_transinfo(ahd,
2428 starget->channel + 'A',
2429 shost->this_id, starget->id, &tstate);
2430 struct ahd_devinfo devinfo;
2431 unsigned int ppr_options = tinfo->goal.ppr_options;
a4b53a11 2432 unsigned int dt;
73a25462
HR		 2433 unsigned long flags;
2434 unsigned long offset = tinfo->goal.offset;
1da177e4 2435
a4b53a11
HR		 2436#ifdef AHD_DEBUG
2437 if ((ahd_debug & AHD_SHOW_DV) != 0)
2438 printf("%s: set period to %d\n", ahd_name(ahd), period);
2439#endif
73a25462
HR		 2440 if (offset == 0)
2441 offset = MAX_OFFSET;
1da177e4 2442
73a25462
HR		 2443 if (period < 8)
2444 period = 8;
2445 if (period < 10) {
0f82cb92
JB		 2446 if (spi_max_width(starget)) {
2447 ppr_options |= MSG_EXT_PPR_DT_REQ;
2448 if (period == 8)
2449 ppr_options |= MSG_EXT_PPR_IU_REQ;
2450 } else
2451 period = 10;
1da177e4
LT		 2452 }
2453
a4b53a11
HR		 2454 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2455
73a25462
HR		 2456 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2457 starget->channel + 'A', ROLE_INITIATOR);
1da177e4 2458
73a25462
HR		 2459 /* all PPR requests apart from QAS require wide transfers */
2460 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2461 if (spi_width(starget) == 0)
2462 ppr_options &= MSG_EXT_PPR_QAS_REQ;
1da177e4 2463 }
73a25462 2464
a4b53a11
HR		 2465 ahd_find_syncrate(ahd, &period, &ppr_options,
2466 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2467
73a25462
HR		 2468 ahd_lock(ahd, &flags);
2469 ahd_set_syncrate(ahd, &devinfo, period, offset,
2470 ppr_options, AHD_TRANS_GOAL, FALSE);
2471 ahd_unlock(ahd, &flags);
1da177e4
LT		 2472}
2473
73a25462 2474static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
1da177e4 2475{
73a25462
HR		 2476 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2477 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2478 struct ahd_tmode_tstate *tstate;
2479 struct ahd_initiator_tinfo *tinfo
2480 = ahd_fetch_transinfo(ahd,
2481 starget->channel + 'A',
2482 shost->this_id, starget->id, &tstate);
2483 struct ahd_devinfo devinfo;
2484 unsigned int ppr_options = 0;
2485 unsigned int period = 0;
a4b53a11 2486 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2487 unsigned long flags;
2488
a4b53a11
HR		 2489#ifdef AHD_DEBUG
2490 if ((ahd_debug & AHD_SHOW_DV) != 0)
2491 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2492#endif
2493
73a25462
HR		 2494 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2495 starget->channel + 'A', ROLE_INITIATOR);
2496 if (offset != 0) {
2497 period = tinfo->goal.period;
2498 ppr_options = tinfo->goal.ppr_options;
a4b53a11
HR		 2499 ahd_find_syncrate(ahd, &period, &ppr_options,
2500 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
1da177e4 2501 }
a4b53a11 2502
73a25462
HR		 2503 ahd_lock(ahd, &flags);
2504 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2505 AHD_TRANS_GOAL, FALSE);
2506 ahd_unlock(ahd, &flags);
1da177e4
LT		 2507}
2508
73a25462 2509static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
1da177e4 2510{
73a25462
HR		 2511 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2512 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2513 struct ahd_tmode_tstate *tstate;
2514 struct ahd_initiator_tinfo *tinfo
2515 = ahd_fetch_transinfo(ahd,
2516 starget->channel + 'A',
2517 shost->this_id, starget->id, &tstate);
2518 struct ahd_devinfo devinfo;
2519 unsigned int ppr_options = tinfo->goal.ppr_options
2520 & ~MSG_EXT_PPR_DT_REQ;
2521 unsigned int period = tinfo->goal.period;
52b5cfb3 2522 unsigned int width = tinfo->goal.width;
73a25462
HR		 2523 unsigned long flags;
2524
a4b53a11
HR		 2525#ifdef AHD_DEBUG
2526 if ((ahd_debug & AHD_SHOW_DV) != 0)
2527 printf("%s: %s DT\n", ahd_name(ahd),
2528 dt ? "enabling" : "disabling");
2529#endif
0f82cb92 2530 if (dt && spi_max_width(starget)) {
73a25462 2531 ppr_options |= MSG_EXT_PPR_DT_REQ;
52b5cfb3
HR		 2532 if (!width)
2533 ahd_linux_set_width(starget, 1);
a4b53a11
HR		 2534 } else {
2535 if (period <= 9)
2536 period = 10; /* If resetting DT, period must be >= 25ns */
2537 /* IU is invalid without DT set */
2538 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2539 }
73a25462
HR		 2540 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2541 starget->channel + 'A', ROLE_INITIATOR);
2542 ahd_find_syncrate(ahd, &period, &ppr_options,
2543 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2544
73a25462
HR		 2545 ahd_lock(ahd, &flags);
2546 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2547 ppr_options, AHD_TRANS_GOAL, FALSE);
2548 ahd_unlock(ahd, &flags);
1da177e4
LT		 2549}
2550
73a25462 2551static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
1da177e4 2552{
73a25462
HR		 2553 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2554 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2555 struct ahd_tmode_tstate *tstate;
2556 struct ahd_initiator_tinfo *tinfo
2557 = ahd_fetch_transinfo(ahd,
2558 starget->channel + 'A',
2559 shost->this_id, starget->id, &tstate);
2560 struct ahd_devinfo devinfo;
2561 unsigned int ppr_options = tinfo->goal.ppr_options
2562 & ~MSG_EXT_PPR_QAS_REQ;
2563 unsigned int period = tinfo->goal.period;
a4b53a11 2564 unsigned int dt;
73a25462
HR		 2565 unsigned long flags;
2566
a4b53a11
HR		 2567#ifdef AHD_DEBUG
2568 if ((ahd_debug & AHD_SHOW_DV) != 0)
2569 printf("%s: %s QAS\n", ahd_name(ahd),
2570 qas ? "enabling" : "disabling");
2571#endif
2572
2573 if (qas) {
2574 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2575 }
2576
2577 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2578
2579 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2580 starget->channel + 'A', ROLE_INITIATOR);
2581 ahd_find_syncrate(ahd, &period, &ppr_options,
2582 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2583
73a25462
HR		 2584 ahd_lock(ahd, &flags);
2585 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2586 ppr_options, AHD_TRANS_GOAL, FALSE);
2587 ahd_unlock(ahd, &flags);
1da177e4
LT		 2588}
2589
73a25462 2590static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
1da177e4 2591{
73a25462
HR		 2592 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2593 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2594 struct ahd_tmode_tstate *tstate;
2595 struct ahd_initiator_tinfo *tinfo
2596 = ahd_fetch_transinfo(ahd,
2597 starget->channel + 'A',
2598 shost->this_id, starget->id, &tstate);
2599 struct ahd_devinfo devinfo;
2600 unsigned int ppr_options = tinfo->goal.ppr_options
2601 & ~MSG_EXT_PPR_IU_REQ;
2602 unsigned int period = tinfo->goal.period;
a4b53a11 2603 unsigned int dt;
73a25462
HR		 2604 unsigned long flags;
2605
a4b53a11
HR		 2606#ifdef AHD_DEBUG
2607 if ((ahd_debug & AHD_SHOW_DV) != 0)
2608 printf("%s: %s IU\n", ahd_name(ahd),
2609 iu ? "enabling" : "disabling");
2610#endif
2611
0f82cb92 2612 if (iu && spi_max_width(starget)) {
73a25462 2613 ppr_options |= MSG_EXT_PPR_IU_REQ;
a4b53a11
HR		 2614 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2615 }
2616
2617 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2618
2619 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2620 starget->channel + 'A', ROLE_INITIATOR);
2621 ahd_find_syncrate(ahd, &period, &ppr_options,
2622 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2623
73a25462
HR		 2624 ahd_lock(ahd, &flags);
2625 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2626 ppr_options, AHD_TRANS_GOAL, FALSE);
2627 ahd_unlock(ahd, &flags);
2628}
1da177e4 2629
73a25462
HR		 2630static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2631{
2632 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2633 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2634 struct ahd_tmode_tstate *tstate;
2635 struct ahd_initiator_tinfo *tinfo
2636 = ahd_fetch_transinfo(ahd,
2637 starget->channel + 'A',
2638 shost->this_id, starget->id, &tstate);
2639 struct ahd_devinfo devinfo;
2640 unsigned int ppr_options = tinfo->goal.ppr_options
2641 & ~MSG_EXT_PPR_RD_STRM;
2642 unsigned int period = tinfo->goal.period;
2643 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2644 unsigned long flags;
2645
a4b53a11
HR		 2646#ifdef AHD_DEBUG
2647 if ((ahd_debug & AHD_SHOW_DV) != 0)
2648 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2649 rdstrm ? "enabling" : "disabling");
2650#endif
2651
0f82cb92 2652 if (rdstrm && spi_max_width(starget))
73a25462
HR		 2653 ppr_options |= MSG_EXT_PPR_RD_STRM;
2654
2655 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2656 starget->channel + 'A', ROLE_INITIATOR);
2657 ahd_find_syncrate(ahd, &period, &ppr_options,
2658 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2659
a4b53a11
HR		 2660 ahd_lock(ahd, &flags);
2661 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2662 ppr_options, AHD_TRANS_GOAL, FALSE);
2663 ahd_unlock(ahd, &flags);
2664}
2665
2666static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2667{
2668 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2669 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2670 struct ahd_tmode_tstate *tstate;
2671 struct ahd_initiator_tinfo *tinfo
2672 = ahd_fetch_transinfo(ahd,
2673 starget->channel + 'A',
2674 shost->this_id, starget->id, &tstate);
2675 struct ahd_devinfo devinfo;
2676 unsigned int ppr_options = tinfo->goal.ppr_options
2677 & ~MSG_EXT_PPR_WR_FLOW;
2678 unsigned int period = tinfo->goal.period;
2679 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2680 unsigned long flags;
2681
2682#ifdef AHD_DEBUG
2683 if ((ahd_debug & AHD_SHOW_DV) != 0)
2684 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2685 wrflow ? "enabling" : "disabling");
2686#endif
2687
0f82cb92 2688 if (wrflow && spi_max_width(starget))
a4b53a11
HR		 2689 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2690
2691 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2692 starget->channel + 'A', ROLE_INITIATOR);
2693 ahd_find_syncrate(ahd, &period, &ppr_options,
2694 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2695
a4b53a11
HR		 2696 ahd_lock(ahd, &flags);
2697 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2698 ppr_options, AHD_TRANS_GOAL, FALSE);
2699 ahd_unlock(ahd, &flags);
2700}
2701
2702static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2703{
2704 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2705 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2706 struct ahd_tmode_tstate *tstate;
2707 struct ahd_initiator_tinfo *tinfo
2708 = ahd_fetch_transinfo(ahd,
2709 starget->channel + 'A',
2710 shost->this_id, starget->id, &tstate);
2711 struct ahd_devinfo devinfo;
2712 unsigned int ppr_options = tinfo->goal.ppr_options
2713 & ~MSG_EXT_PPR_RTI;
2714 unsigned int period = tinfo->goal.period;
2715 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2716 unsigned long flags;
2717
2718 if ((ahd->features & AHD_RTI) == 0) {
2719#ifdef AHD_DEBUG
2720 if ((ahd_debug & AHD_SHOW_DV) != 0)
2721 printf("%s: RTI not available\n", ahd_name(ahd));
2722#endif
2723 return;
2724 }
2725
2726#ifdef AHD_DEBUG
2727 if ((ahd_debug & AHD_SHOW_DV) != 0)
2728 printf("%s: %s RTI\n", ahd_name(ahd),
2729 rti ? "enabling" : "disabling");
2730#endif
2731
0f82cb92 2732 if (rti && spi_max_width(starget))
a4b53a11
HR		 2733 ppr_options |= MSG_EXT_PPR_RTI;
2734
2735 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2736 starget->channel + 'A', ROLE_INITIATOR);
2737 ahd_find_syncrate(ahd, &period, &ppr_options,
2738 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2739
a4b53a11
HR		 2740 ahd_lock(ahd, &flags);
2741 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2742 ppr_options, AHD_TRANS_GOAL, FALSE);
2743 ahd_unlock(ahd, &flags);
2744}
2745
2746static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2747{
2748 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2749 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2750 struct ahd_tmode_tstate *tstate;
2751 struct ahd_initiator_tinfo *tinfo
2752 = ahd_fetch_transinfo(ahd,
2753 starget->channel + 'A',
2754 shost->this_id, starget->id, &tstate);
2755 struct ahd_devinfo devinfo;
2756 unsigned int ppr_options = tinfo->goal.ppr_options
2757 & ~MSG_EXT_PPR_PCOMP_EN;
2758 unsigned int period = tinfo->goal.period;
2759 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2760 unsigned long flags;
2761
2762#ifdef AHD_DEBUG
2763 if ((ahd_debug & AHD_SHOW_DV) != 0)
2764 printf("%s: %s Precompensation\n", ahd_name(ahd),
2765 pcomp ? "Enable" : "Disable");
2766#endif
2767
0f82cb92 2768 if (pcomp && spi_max_width(starget)) {
843822ad
HR		 2769 uint8_t precomp;
2770
2771 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2772 struct ahd_linux_iocell_opts *iocell_opts;
2773
2774 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2775 precomp = iocell_opts->precomp;
2776 } else {
2777 precomp = AIC79XX_DEFAULT_PRECOMP;
2778 }
a4b53a11 2779 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
843822ad
HR		 2780 AHD_SET_PRECOMP(ahd, precomp);
2781 } else {
2782 AHD_SET_PRECOMP(ahd, 0);
2783 }
a4b53a11
HR		 2784
2785 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2786 starget->channel + 'A', ROLE_INITIATOR);
2787 ahd_find_syncrate(ahd, &period, &ppr_options,
2788 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2789
73a25462
HR		 2790 ahd_lock(ahd, &flags);
2791 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2792 ppr_options, AHD_TRANS_GOAL, FALSE);
2793 ahd_unlock(ahd, &flags);
1da177e4
LT		 2794}
2795
88ff29a4
JB		 2796static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2797{
2798 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2799 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2800 struct ahd_tmode_tstate *tstate;
2801 struct ahd_initiator_tinfo *tinfo
2802 = ahd_fetch_transinfo(ahd,
2803 starget->channel + 'A',
2804 shost->this_id, starget->id, &tstate);
2805 struct ahd_devinfo devinfo;
2806 unsigned int ppr_options = tinfo->goal.ppr_options
2807 & ~MSG_EXT_PPR_HOLD_MCS;
2808 unsigned int period = tinfo->goal.period;
2809 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2810 unsigned long flags;
2811
0f82cb92 2812 if (hold && spi_max_width(starget))
88ff29a4
JB		 2813 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2814
2815 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2816 starget->channel + 'A', ROLE_INITIATOR);
2817 ahd_find_syncrate(ahd, &period, &ppr_options,
2818 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2819
2820 ahd_lock(ahd, &flags);
2821 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2822 ppr_options, AHD_TRANS_GOAL, FALSE);
2823 ahd_unlock(ahd, &flags);
2824}
2825
d6b9ccbb
HR		 2826static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2827{
2828 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2829 unsigned long flags;
2830 u8 mode;
88ff29a4 2831
d6b9ccbb
HR		 2832 ahd_lock(ahd, &flags);
2833 ahd_pause(ahd);
2834 mode = ahd_inb(ahd, SBLKCTL);
2835 ahd_unpause(ahd);
2836 ahd_unlock(ahd, &flags);
2837
2838 if (mode & ENAB40)
2839 spi_signalling(shost) = SPI_SIGNAL_LVD;
2840 else if (mode & ENAB20)
2841 spi_signalling(shost) = SPI_SIGNAL_SE;
2842 else
2843 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2844}
88ff29a4 2845
73a25462
HR		 2846static struct spi_function_template ahd_linux_transport_functions = {
2847 .set_offset = ahd_linux_set_offset,
2848 .show_offset = 1,
2849 .set_period = ahd_linux_set_period,
2850 .show_period = 1,
2851 .set_width = ahd_linux_set_width,
2852 .show_width = 1,
2853 .set_dt = ahd_linux_set_dt,
2854 .show_dt = 1,
2855 .set_iu = ahd_linux_set_iu,
2856 .show_iu = 1,
2857 .set_qas = ahd_linux_set_qas,
2858 .show_qas = 1,
2859 .set_rd_strm = ahd_linux_set_rd_strm,
2860 .show_rd_strm = 1,
a4b53a11
HR		 2861 .set_wr_flow = ahd_linux_set_wr_flow,
2862 .show_wr_flow = 1,
2863 .set_rti = ahd_linux_set_rti,
2864 .show_rti = 1,
2865 .set_pcomp_en = ahd_linux_set_pcomp_en,
2866 .show_pcomp_en = 1,
88ff29a4
JB		 2867 .set_hold_mcs = ahd_linux_set_hold_mcs,
2868 .show_hold_mcs = 1,
d6b9ccbb 2869 .get_signalling = ahd_linux_get_signalling,
73a25462
HR		 2870};
2871
1da177e4
LT		 2872static int __init
2873ahd_linux_init(void)
2874{
85a46523
CH		 2875 int error = 0;
2876
2877 /*
2878 * If we've been passed any parameters, process them now.
2879 */
2880 if (aic79xx)
2881 aic79xx_setup(aic79xx);
2882
2883 ahd_linux_transport_template =
2884 spi_attach_transport(&ahd_linux_transport_functions);
73a25462
HR		 2885 if (!ahd_linux_transport_template)
2886 return -ENODEV;
85a46523 2887
73a25462
HR		 2888 scsi_transport_reserve_device(ahd_linux_transport_template,
2889 sizeof(struct ahd_linux_device));
a80b3424 2890
85a46523
CH		 2891 error = ahd_linux_pci_init();
2892 if (error)
2893 spi_release_transport(ahd_linux_transport_template);
2894 return error;
1da177e4
LT		 2895}
2896
2897static void __exit
2898ahd_linux_exit(void)
2899{
1da177e4 2900 ahd_linux_pci_exit();
73a25462 2901 spi_release_transport(ahd_linux_transport_template);
1da177e4
LT		 2902}
2903
2904module_init(ahd_linux_init);
2905module_exit(ahd_linux_exit);
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