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Merge branch 'x86-reboot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[deliverable/linux.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
CommitLineData
1da177e4
LT		 1/*
2 * Adaptec AIC79xx device driver for Linux.
3 *
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
5 *
6 * --------------------------------------------------------------------------
7 * Copyright (c) 1994-2000 Justin T. Gibbs.
8 * Copyright (c) 1997-1999 Doug Ledford
9 * Copyright (c) 2000-2003 Adaptec Inc.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45#include "aic79xx_osm.h"
46#include "aic79xx_inline.h"
47#include <scsi/scsicam.h>
48
73a25462
HR		 49static struct scsi_transport_template *ahd_linux_transport_template = NULL;
50
1da177e4 51#include <linux/init.h> /* __setup */
1da177e4 52#include <linux/mm.h> /* For fetching system memory size */
73a25462 53#include <linux/blkdev.h> /* For block_size() */
1da177e4 54#include <linux/delay.h> /* For ssleep/msleep */
017560fc 55#include <linux/device.h>
5a0e3ad6 56#include <linux/slab.h>
1da177e4 57
1da177e4
LT		 58/*
59 * Bucket size for counting good commands in between bad ones.
60 */
61#define AHD_LINUX_ERR_THRESH 1000
62
63/*
64 * Set this to the delay in seconds after SCSI bus reset.
65 * Note, we honor this only for the initial bus reset.
66 * The scsi error recovery code performs its own bus settle
67 * delay handling for error recovery actions.
68 */
69#ifdef CONFIG_AIC79XX_RESET_DELAY_MS
70#define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
71#else
72#define AIC79XX_RESET_DELAY 5000
73#endif
74
75/*
76 * To change the default number of tagged transactions allowed per-device,
77 * add a line to the lilo.conf file like:
78 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
79 * which will result in the first four devices on the first two
80 * controllers being set to a tagged queue depth of 32.
81 *
82 * The tag_commands is an array of 16 to allow for wide and twin adapters.
83 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
84 * for channel 1.
85 */
86typedef struct {
87 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
88} adapter_tag_info_t;
89
90/*
91 * Modify this as you see fit for your system.
92 *
93 * 0 tagged queuing disabled
94 * 1 <= n <= 253 n == max tags ever dispatched.
95 *
96 * The driver will throttle the number of commands dispatched to a
97 * device if it returns queue full. For devices with a fixed maximum
98 * queue depth, the driver will eventually determine this depth and
99 * lock it in (a console message is printed to indicate that a lock
100 * has occurred). On some devices, queue full is returned for a temporary
101 * resource shortage. These devices will return queue full at varying
102 * depths. The driver will throttle back when the queue fulls occur and
103 * attempt to slowly increase the depth over time as the device recovers
104 * from the resource shortage.
105 *
106 * In this example, the first line will disable tagged queueing for all
107 * the devices on the first probed aic79xx adapter.
108 *
109 * The second line enables tagged queueing with 4 commands/LUN for IDs
110 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
111 * driver to attempt to use up to 64 tags for ID 1.
112 *
113 * The third line is the same as the first line.
114 *
115 * The fourth line disables tagged queueing for devices 0 and 3. It
116 * enables tagged queueing for the other IDs, with 16 commands/LUN
117 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
118 * IDs 2, 5-7, and 9-15.
119 */
120
121/*
122 * NOTE: The below structure is for reference only, the actual structure
123 * to modify in order to change things is just below this comment block.
124adapter_tag_info_t aic79xx_tag_info[] =
125{
126 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
127 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
128 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
129 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
130};
131*/
132
133#ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
134#define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
135#else
136#define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
137#endif
138
139#define AIC79XX_CONFIGED_TAG_COMMANDS { \
140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
147 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
148}
149
150/*
151 * By default, use the number of commands specified by
152 * the users kernel configuration.
153 */
154static adapter_tag_info_t aic79xx_tag_info[] =
155{
156 {AIC79XX_CONFIGED_TAG_COMMANDS},
157 {AIC79XX_CONFIGED_TAG_COMMANDS},
158 {AIC79XX_CONFIGED_TAG_COMMANDS},
159 {AIC79XX_CONFIGED_TAG_COMMANDS},
160 {AIC79XX_CONFIGED_TAG_COMMANDS},
161 {AIC79XX_CONFIGED_TAG_COMMANDS},
162 {AIC79XX_CONFIGED_TAG_COMMANDS},
163 {AIC79XX_CONFIGED_TAG_COMMANDS},
164 {AIC79XX_CONFIGED_TAG_COMMANDS},
165 {AIC79XX_CONFIGED_TAG_COMMANDS},
166 {AIC79XX_CONFIGED_TAG_COMMANDS},
167 {AIC79XX_CONFIGED_TAG_COMMANDS},
168 {AIC79XX_CONFIGED_TAG_COMMANDS},
169 {AIC79XX_CONFIGED_TAG_COMMANDS},
170 {AIC79XX_CONFIGED_TAG_COMMANDS},
171 {AIC79XX_CONFIGED_TAG_COMMANDS}
172};
173
1da177e4
LT		 174/*
175 * The I/O cell on the chip is very configurable in respect to its analog
176 * characteristics. Set the defaults here; they can be overriden with
177 * the proper insmod parameters.
178 */
179struct ahd_linux_iocell_opts
180{
181 uint8_t precomp;
182 uint8_t slewrate;
183 uint8_t amplitude;
184};
185#define AIC79XX_DEFAULT_PRECOMP 0xFF
186#define AIC79XX_DEFAULT_SLEWRATE 0xFF
187#define AIC79XX_DEFAULT_AMPLITUDE 0xFF
188#define AIC79XX_DEFAULT_IOOPTS \
189{ \
190 AIC79XX_DEFAULT_PRECOMP, \
191 AIC79XX_DEFAULT_SLEWRATE, \
192 AIC79XX_DEFAULT_AMPLITUDE \
193}
194#define AIC79XX_PRECOMP_INDEX 0
195#define AIC79XX_SLEWRATE_INDEX 1
196#define AIC79XX_AMPLITUDE_INDEX 2
980b306a 197static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
1da177e4
LT		 198{
199 AIC79XX_DEFAULT_IOOPTS,
200 AIC79XX_DEFAULT_IOOPTS,
201 AIC79XX_DEFAULT_IOOPTS,
202 AIC79XX_DEFAULT_IOOPTS,
203 AIC79XX_DEFAULT_IOOPTS,
204 AIC79XX_DEFAULT_IOOPTS,
205 AIC79XX_DEFAULT_IOOPTS,
206 AIC79XX_DEFAULT_IOOPTS,
207 AIC79XX_DEFAULT_IOOPTS,
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS,
214 AIC79XX_DEFAULT_IOOPTS
215};
216
217/*
218 * There should be a specific return value for this in scsi.h, but
219 * it seems that most drivers ignore it.
220 */
221#define DID_UNDERFLOW DID_ERROR
222
223void
224ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
225{
226 printk("(scsi%d:%c:%d:%d): ",
227 ahd->platform_data->host->host_no,
228 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
229 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
230 scb != NULL ? SCB_GET_LUN(scb) : -1);
231}
232
233/*
234 * XXX - these options apply unilaterally to _all_ adapters
235 * cards in the system. This should be fixed. Exceptions to this
236 * rule are noted in the comments.
237 */
238
239/*
240 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
241 * has no effect on any later resets that might occur due to things like
242 * SCSI bus timeouts.
243 */
244static uint32_t aic79xx_no_reset;
245
1da177e4
LT		 246/*
247 * Should we force EXTENDED translation on a controller.
248 * 0 == Use whatever is in the SEEPROM or default to off
249 * 1 == Use whatever is in the SEEPROM or default to on
250 */
251static uint32_t aic79xx_extended;
252
253/*
254 * PCI bus parity checking of the Adaptec controllers. This is somewhat
255 * dubious at best. To my knowledge, this option has never actually
256 * solved a PCI parity problem, but on certain machines with broken PCI
257 * chipset configurations, it can generate tons of false error messages.
258 * It's included in the driver for completeness.
259 * 0 = Shut off PCI parity check
260 * non-0 = Enable PCI parity check
261 *
262 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
263 * variable to -1 you would actually want to simply pass the variable
264 * name without a number. That will invert the 0 which will result in
265 * -1.
266 */
267static uint32_t aic79xx_pci_parity = ~0;
268
269/*
270 * There are lots of broken chipsets in the world. Some of them will
271 * violate the PCI spec when we issue byte sized memory writes to our
272 * controller. I/O mapped register access, if allowed by the given
273 * platform, will work in almost all cases.
274 */
275uint32_t aic79xx_allow_memio = ~0;
276
1da177e4
LT		 277/*
278 * So that we can set how long each device is given as a selection timeout.
279 * The table of values goes like this:
280 * 0 - 256ms
281 * 1 - 128ms
282 * 2 - 64ms
283 * 3 - 32ms
284 * We default to 256ms because some older devices need a longer time
285 * to respond to initial selection.
286 */
287static uint32_t aic79xx_seltime;
288
289/*
290 * Certain devices do not perform any aging on commands. Should the
291 * device be saturated by commands in one portion of the disk, it is
292 * possible for transactions on far away sectors to never be serviced.
293 * To handle these devices, we can periodically send an ordered tag to
294 * force all outstanding transactions to be serviced prior to a new
295 * transaction.
296 */
289fe5b1 297static uint32_t aic79xx_periodic_otag;
1da177e4 298
3fb08612
HR		 299/* Some storage boxes are using an LSI chip which has a bug making it
300 * impossible to use aic79xx Rev B chip in 320 speeds. The following
301 * storage boxes have been reported to be buggy:
302 * EonStor 3U 16-Bay: U16U-G3A3
303 * EonStor 2U 12-Bay: U12U-G3A3
304 * SentinelRAID: 2500F R5 / R6
305 * SentinelRAID: 2500F R1
306 * SentinelRAID: 2500F/1500F
307 * SentinelRAID: 150F
308 *
309 * To get around this LSI bug, you can set your board to 160 mode
310 * or you can enable the SLOWCRC bit.
311 */
312uint32_t aic79xx_slowcrc;
313
1da177e4
LT		 314/*
315 * Module information and settable options.
316 */
317static char *aic79xx = NULL;
318
64624d4f
HR		 319MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
320MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
1da177e4
LT		 321MODULE_LICENSE("Dual BSD/GPL");
322MODULE_VERSION(AIC79XX_DRIVER_VERSION);
73a25462 323module_param(aic79xx, charp, 0444);
1da177e4 324MODULE_PARM_DESC(aic79xx,
2b6ee9b5 325"period-delimited options string:\n"
1da177e4
LT		 326" verbose Enable verbose/diagnostic logging\n"
327" allow_memio Allow device registers to be memory mapped\n"
328" debug Bitmask of debug values to enable\n"
b1c11812 329" no_reset Suppress initial bus resets\n"
1da177e4
LT		 330" extended Enable extended geometry on all controllers\n"
331" periodic_otag Send an ordered tagged transaction\n"
332" periodically to prevent tag starvation.\n"
333" This may be required by some older disk\n"
334" or drives/RAID arrays.\n"
1da177e4
LT		 335" tag_info:<tag_str> Set per-target tag depth\n"
336" global_tag_depth:<int> Global tag depth for all targets on all buses\n"
1da177e4
LT		 337" slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
338" precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
339" amplitude:<int> Set the signal amplitude (0-7).\n"
340" seltime:<int> Selection Timeout:\n"
341" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
3fb08612 342" slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
1da177e4 343"\n"
970e2486
LDM		 344" Sample modprobe configuration file:\n"
345" # Enable verbose logging\n"
346" # Set tag depth on Controller 2/Target 2 to 10 tags\n"
347" # Shorten the selection timeout to 128ms\n"
1da177e4
LT		 348"\n"
349" options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
2b6ee9b5 350);
1da177e4
LT		 351
352static void ahd_linux_handle_scsi_status(struct ahd_softc *,
73a25462 353 struct scsi_device *,
1da177e4
LT		 354 struct scb *);
355static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
73a25462 356 struct scsi_cmnd *cmd);
6902f416 357static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
1da177e4 358static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
1da177e4
LT		 359static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
360 struct ahd_devinfo *devinfo);
73a25462 361static void ahd_linux_device_queue_depth(struct scsi_device *);
60a13213 362static int ahd_linux_run_command(struct ahd_softc*,
73a25462 363 struct ahd_linux_device *,
60a13213 364 struct scsi_cmnd *);
1da177e4 365static void ahd_linux_setup_tag_info_global(char *p);
73a25462 366static int aic79xx_setup(char *c);
e3e0ca51
AB		 367static void ahd_freeze_simq(struct ahd_softc *ahd);
368static void ahd_release_simq(struct ahd_softc *ahd);
85a46523
CH		 369
370static int ahd_linux_unit;
371
1da177e4 372
be0d6768
DV		 373/************************** OS Utility Wrappers *******************************/
374void ahd_delay(long);
375void
376ahd_delay(long usec)
377{
378 /*
379 * udelay on Linux can have problems for
380 * multi-millisecond waits. Wait at most
381 * 1024us per call.
382 */
383 while (usec > 0) {
384 udelay(usec % 1024);
385 usec -= 1024;
386 }
387}
388
389
390/***************************** Low Level I/O **********************************/
391uint8_t ahd_inb(struct ahd_softc * ahd, long port);
be0d6768
DV		 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
d1d7b19d
DV		 414#if 0 /* unused */
415static uint16_t
be0d6768
DV		 416ahd_inw_atomic(struct ahd_softc * ahd, long port)
417{
418 uint8_t x;
419
420 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
421 x = readw(ahd->bshs[0].maddr + port);
422 } else {
423 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
424 }
425 mb();
426 return (x);
427}
d1d7b19d 428#endif
be0d6768
DV		 429
430void
431ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
432{
433 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
434 writeb(val, ahd->bshs[0].maddr + port);
435 } else {
436 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
437 }
438 mb();
439}
440
441void
442ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
443{
444 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
445 writew(val, ahd->bshs[0].maddr + port);
446 } else {
447 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
448 }
449 mb();
450}
451
452void
453ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
454{
455 int i;
456
457 /*
458 * There is probably a more efficient way to do this on Linux
459 * but we don't use this for anything speed critical and this
460 * should work.
461 */
462 for (i = 0; i < count; i++)
463 ahd_outb(ahd, port, *array++);
464}
465
466void
467ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
468{
469 int i;
470
471 /*
472 * There is probably a more efficient way to do this on Linux
473 * but we don't use this for anything speed critical and this
474 * should work.
475 */
476 for (i = 0; i < count; i++)
477 *array++ = ahd_inb(ahd, port);
478}
479
480/******************************* PCI Routines *********************************/
481uint32_t
482ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
483{
484 switch (width) {
485 case 1:
486 {
487 uint8_t retval;
488
489 pci_read_config_byte(pci, reg, &retval);
490 return (retval);
491 }
492 case 2:
493 {
494 uint16_t retval;
495 pci_read_config_word(pci, reg, &retval);
496 return (retval);
497 }
498 case 4:
499 {
500 uint32_t retval;
501 pci_read_config_dword(pci, reg, &retval);
502 return (retval);
503 }
504 default:
505 panic("ahd_pci_read_config: Read size too big");
506 /* NOTREACHED */
507 return (0);
508 }
509}
510
511void
512ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
513{
514 switch (width) {
515 case 1:
516 pci_write_config_byte(pci, reg, value);
517 break;
518 case 2:
519 pci_write_config_word(pci, reg, value);
520 break;
521 case 4:
522 pci_write_config_dword(pci, reg, value);
523 break;
524 default:
525 panic("ahd_pci_write_config: Write size too big");
526 /* NOTREACHED */
527 }
528}
529
1da177e4 530/****************************** Inlines ***************************************/
be0d6768 531static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
1da177e4 532
be0d6768 533static void
1da177e4
LT		 534ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
535{
73a25462 536 struct scsi_cmnd *cmd;
1da177e4
LT		 537
538 cmd = scb->io_ctx;
1da177e4 539 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
4c688fc7 540 scsi_dma_unmap(cmd);
1da177e4
LT		 541}
542
543/******************************** Macros **************************************/
544#define BUILD_SCSIID(ahd, cmd) \
422c0d61 545 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
1da177e4 546
1da177e4
LT		 547/*
548 * Return a string describing the driver.
549 */
550static const char *
551ahd_linux_info(struct Scsi_Host *host)
552{
553 static char buffer[512];
554 char ahd_info[256];
555 char *bp;
556 struct ahd_softc *ahd;
557
558 bp = &buffer[0];
559 ahd = *(struct ahd_softc **)host->hostdata;
560 memset(bp, 0, sizeof(buffer));
980b306a
DV		 561 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
562 " <");
1da177e4 563 strcat(bp, ahd->description);
980b306a
DV		 564 strcat(bp, ">\n"
565 " ");
1da177e4
LT		 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
f281233d 576ahd_linux_queue_lck(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
f281233d
JG		 591static DEF_SCSI_QCMD(ahd_linux_queue)
592
be0d6768 593static struct scsi_target **
73a25462
HR		 594ahd_linux_target_in_softc(struct scsi_target *starget)
595{
596 struct ahd_softc *ahd =
597 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
598 unsigned int target_offset;
599
600 target_offset = starget->id;
601 if (starget->channel != 0)
602 target_offset += 8;
603
604 return &ahd->platform_data->starget[target_offset];
605}
606
1da177e4 607static int
73a25462 608ahd_linux_target_alloc(struct scsi_target *starget)
1da177e4 609{
73a25462
HR		 610 struct ahd_softc *ahd =
611 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
986a25f9 612 struct seeprom_config *sc = ahd->seep_config;
73a25462
HR		 613 unsigned long flags;
614 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
73a25462
HR		 615 struct ahd_devinfo devinfo;
616 struct ahd_initiator_tinfo *tinfo;
617 struct ahd_tmode_tstate *tstate;
618 char channel = starget->channel + 'A';
1da177e4 619
73a25462
HR		 620 ahd_lock(ahd, &flags);
621
622 BUG_ON(*ahd_targp != NULL);
623
624 *ahd_targp = starget;
73a25462 625
986a25f9
HR		 626 if (sc) {
627 int flags = sc->device_flags[starget->id];
628
629 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
630 starget->id, &tstate);
631
632 if ((flags & CFPACKETIZED) == 0) {
ea443190
JB		 633 /* don't negotiate packetized (IU) transfers */
634 spi_max_iu(starget) = 0;
986a25f9
HR		 635 } else {
636 if ((ahd->features & AHD_RTI) == 0)
637 spi_rti(starget) = 0;
638 }
639
640 if ((flags & CFQAS) == 0)
ea443190 641 spi_max_qas(starget) = 0;
986a25f9
HR		 642
643 /* Transinfo values have been set to BIOS settings */
644 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
645 spi_min_period(starget) = tinfo->user.period;
646 spi_max_offset(starget) = tinfo->user.offset;
647 }
648
73a25462
HR		 649 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
650 starget->id, &tstate);
651 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
652 CAM_LUN_WILDCARD, channel,
653 ROLE_INITIATOR);
73a25462
HR		 654 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
655 AHD_TRANS_GOAL, /*paused*/FALSE);
656 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
657 AHD_TRANS_GOAL, /*paused*/FALSE);
658 ahd_unlock(ahd, &flags);
659
660 return 0;
661}
662
663static void
664ahd_linux_target_destroy(struct scsi_target *starget)
665{
666 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
667
668 *ahd_targp = NULL;
1da177e4
LT		 669}
670
671static int
73a25462 672ahd_linux_slave_alloc(struct scsi_device *sdev)
1da177e4 673{
73a25462
HR		 674 struct ahd_softc *ahd =
675 *((struct ahd_softc **)sdev->host->hostdata);
73a25462 676 struct ahd_linux_device *dev;
1da177e4 677
1da177e4 678 if (bootverbose)
48813cf9 679 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
73a25462 680
73a25462
HR		 681 dev = scsi_transport_device_data(sdev);
682 memset(dev, 0, sizeof(*dev));
683
684 /*
685 * We start out life using untagged
686 * transactions of which we allow one.
687 */
688 dev->openings = 1;
689
1da177e4 690 /*
73a25462
HR		 691 * Set maxtags to 0. This will be changed if we
692 * later determine that we are dealing with
693 * a tagged queuing capable device.
1da177e4 694 */
73a25462
HR		 695 dev->maxtags = 0;
696
1da177e4
LT		 697 return (0);
698}
699
73a25462
HR		 700static int
701ahd_linux_slave_configure(struct scsi_device *sdev)
702{
703 struct ahd_softc *ahd;
704
705 ahd = *((struct ahd_softc **)sdev->host->hostdata);
706 if (bootverbose)
017560fc 707 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
73a25462
HR		 708
709 ahd_linux_device_queue_depth(sdev);
710
711 /* Initial Domain Validation */
712 if (!spi_initial_dv(sdev->sdev_target))
713 spi_dv_device(sdev);
714
715 return 0;
716}
717
1da177e4
LT		 718#if defined(__i386__)
719/*
720 * Return the disk geometry for the given SCSI device.
721 */
722static int
1da177e4
LT		 723ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
724 sector_t capacity, int geom[])
725{
726 uint8_t *bh;
1da177e4
LT		 727 int heads;
728 int sectors;
729 int cylinders;
730 int ret;
731 int extended;
732 struct ahd_softc *ahd;
733
734 ahd = *((struct ahd_softc **)sdev->host->hostdata);
735
1da177e4 736 bh = scsi_bios_ptable(bdev);
1da177e4
LT		 737 if (bh) {
738 ret = scsi_partsize(bh, capacity,
739 &geom[2], &geom[0], &geom[1]);
1da177e4 740 kfree(bh);
1da177e4
LT		 741 if (ret != -1)
742 return (ret);
743 }
744 heads = 64;
745 sectors = 32;
746 cylinders = aic_sector_div(capacity, heads, sectors);
747
748 if (aic79xx_extended != 0)
749 extended = 1;
750 else
751 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
752 if (extended && cylinders >= 1024) {
753 heads = 255;
754 sectors = 63;
755 cylinders = aic_sector_div(capacity, heads, sectors);
756 }
757 geom[0] = heads;
758 geom[1] = sectors;
759 geom[2] = cylinders;
760 return (0);
761}
762#endif
763
764/*
765 * Abort the current SCSI command(s).
766 */
767static int
73a25462
HR		 768ahd_linux_abort(struct scsi_cmnd *cmd)
769{
770 int error;
6902f416
HR		 771
772 error = ahd_linux_queue_abort_cmd(cmd);
73a25462 773
73a25462
HR		 774 return error;
775}
776
777/*
778 * Attempt to send a target reset message to the device that timed out.
779 */
780static int
781ahd_linux_dev_reset(struct scsi_cmnd *cmd)
782{
6902f416
HR		 783 struct ahd_softc *ahd;
784 struct ahd_linux_device *dev;
785 struct scb *reset_scb;
786 u_int cdb_byte;
787 int retval = SUCCESS;
788 int paused;
789 int wait;
790 struct ahd_initiator_tinfo *tinfo;
791 struct ahd_tmode_tstate *tstate;
792 unsigned long flags;
6e9a4738 793 DECLARE_COMPLETION_ONSTACK(done);
73a25462 794
6902f416
HR		 795 reset_scb = NULL;
796 paused = FALSE;
797 wait = FALSE;
798 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
799
800 scmd_printk(KERN_INFO, cmd,
801 "Attempting to queue a TARGET RESET message:");
802
48813cf9 803 printk("CDB:");
6902f416 804 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
48813cf9
PE		 805 printk(" 0x%x", cmd->cmnd[cdb_byte]);
806 printk("\n");
6902f416
HR		 807
808 /*
809 * Determine if we currently own this command.
810 */
811 dev = scsi_transport_device_data(cmd->device);
812
813 if (dev == NULL) {
814 /*
815 * No target device for this command exists,
816 * so we must not still own the command.
817 */
818 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
819 return SUCCESS;
820 }
821
822 /*
823 * Generate us a new SCB
824 */
825 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
826 if (!reset_scb) {
827 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
828 return FAILED;
829 }
830
831 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
832 cmd->device->id, &tstate);
833 reset_scb->io_ctx = cmd;
834 reset_scb->platform_data->dev = dev;
835 reset_scb->sg_count = 0;
836 ahd_set_residual(reset_scb, 0);
837 ahd_set_sense_residual(reset_scb, 0);
838 reset_scb->platform_data->xfer_len = 0;
839 reset_scb->hscb->control = 0;
840 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
841 reset_scb->hscb->lun = cmd->device->lun;
842 reset_scb->hscb->cdb_len = 0;
843 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
844 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
845 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
846 reset_scb->flags |= SCB_PACKETIZED;
847 } else {
848 reset_scb->hscb->control |= MK_MESSAGE;
849 }
850 dev->openings--;
851 dev->active++;
852 dev->commands_issued++;
853
854 ahd_lock(ahd, &flags);
855
856 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
857 ahd_queue_scb(ahd, reset_scb);
858
859 ahd->platform_data->eh_done = &done;
860 ahd_unlock(ahd, &flags);
861
48813cf9 862 printk("%s: Device reset code sleeping\n", ahd_name(ahd));
6902f416
HR		 863 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
864 ahd_lock(ahd, &flags);
865 ahd->platform_data->eh_done = NULL;
866 ahd_unlock(ahd, &flags);
48813cf9 867 printk("%s: Device reset timer expired (active %d)\n",
6902f416
HR		 868 ahd_name(ahd), dev->active);
869 retval = FAILED;
870 }
48813cf9 871 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
6902f416
HR		 872
873 return (retval);
73a25462
HR		 874}
875
876/*
877 * Reset the SCSI bus.
878 */
879static int
880ahd_linux_bus_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 881{
882 struct ahd_softc *ahd;
73a25462 883 int found;
f41b5cec 884 unsigned long flags;
1da177e4 885
1da177e4 886 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
73a25462
HR		 887#ifdef AHD_DEBUG
888 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
48813cf9 889 printk("%s: Bus reset called for cmd %p\n",
73a25462
HR		 890 ahd_name(ahd), cmd);
891#endif
f41b5cec
HR		 892 ahd_lock(ahd, &flags);
893
422c0d61 894 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
73a25462 895 /*initiate reset*/TRUE);
f41b5cec 896 ahd_unlock(ahd, &flags);
1da177e4 897
73a25462 898 if (bootverbose)
48813cf9 899 printk("%s: SCSI bus reset delivered. "
73a25462 900 "%d SCBs aborted.\n", ahd_name(ahd), found);
1da177e4 901
73a25462
HR		 902 return (SUCCESS);
903}
1da177e4 904
73a25462
HR		 905struct scsi_host_template aic79xx_driver_template = {
906 .module = THIS_MODULE,
907 .name = "aic79xx",
85a46523 908 .proc_name = "aic79xx",
f6f83a6c
AV		 909 .show_info = ahd_linux_show_info,
910 .write_info = ahd_proc_write_seeprom,
73a25462
HR		 911 .info = ahd_linux_info,
912 .queuecommand = ahd_linux_queue,
913 .eh_abort_handler = ahd_linux_abort,
914 .eh_device_reset_handler = ahd_linux_dev_reset,
915 .eh_bus_reset_handler = ahd_linux_bus_reset,
916#if defined(__i386__)
917 .bios_param = ahd_linux_biosparam,
918#endif
919 .can_queue = AHD_MAX_QUEUE,
920 .this_id = -1,
80f1443c 921 .max_sectors = 8192,
73a25462
HR		 922 .cmd_per_lun = 2,
923 .use_clustering = ENABLE_CLUSTERING,
924 .slave_alloc = ahd_linux_slave_alloc,
925 .slave_configure = ahd_linux_slave_configure,
73a25462
HR		 926 .target_alloc = ahd_linux_target_alloc,
927 .target_destroy = ahd_linux_target_destroy,
928};
1da177e4 929
73a25462
HR		 930/******************************** Bus DMA *************************************/
931int
932ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
933 bus_size_t alignment, bus_size_t boundary,
934 dma_addr_t lowaddr, dma_addr_t highaddr,
935 bus_dma_filter_t *filter, void *filterarg,
936 bus_size_t maxsize, int nsegments,
937 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
938{
939 bus_dma_tag_t dmat;
940
48813cf9 941 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
73a25462
HR		 942 if (dmat == NULL)
943 return (ENOMEM);
1da177e4 944
1da177e4 945 /*
73a25462
HR		 946 * Linux is very simplistic about DMA memory. For now don't
947 * maintain all specification information. Once Linux supplies
948 * better facilities for doing these operations, or the
949 * needs of this particular driver change, we might need to do
950 * more here.
1da177e4 951 */
73a25462
HR		 952 dmat->alignment = alignment;
953 dmat->boundary = boundary;
954 dmat->maxsize = maxsize;
955 *ret_tag = dmat;
956 return (0);
957}
1da177e4 958
73a25462
HR		 959void
960ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
961{
48813cf9 962 kfree(dmat);
73a25462 963}
1da177e4 964
73a25462
HR		 965int
966ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
967 int flags, bus_dmamap_t *mapp)
968{
969 *vaddr = pci_alloc_consistent(ahd->dev_softc,
970 dmat->maxsize, mapp);
971 if (*vaddr == NULL)
972 return (ENOMEM);
973 return(0);
974}
1da177e4 975
73a25462
HR		 976void
977ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
978 void* vaddr, bus_dmamap_t map)
979{
980 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
981 vaddr, map);
982}
983
984int
985ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
986 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
987 void *cb_arg, int flags)
988{
1da177e4 989 /*
73a25462
HR		 990 * Assume for now that this will only be used during
991 * initialization and not for per-transaction buffer mapping.
1da177e4 992 */
73a25462 993 bus_dma_segment_t stack_sg;
1da177e4 994
73a25462
HR		 995 stack_sg.ds_addr = map;
996 stack_sg.ds_len = dmat->maxsize;
997 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
998 return (0);
999}
1da177e4 1000
73a25462
HR		 1001void
1002ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1003{
1004}
1da177e4 1005
73a25462
HR		 1006int
1007ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1008{
1009 /* Nothing to do */
1010 return (0);
1011}
1da177e4 1012
73a25462 1013/********************* Platform Dependent Functions ***************************/
73a25462
HR		 1014static void
1015ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1016{
1da177e4 1017
73a25462 1018 if ((instance >= 0)
6391a113 1019 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
73a25462
HR		 1020 uint8_t *iocell_info;
1021
1022 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1023 iocell_info[index] = value & 0xFFFF;
1024 if (bootverbose)
48813cf9 1025 printk("iocell[%d:%ld] = %d\n", instance, index, value);
1da177e4 1026 }
73a25462 1027}
1da177e4 1028
73a25462
HR		 1029static void
1030ahd_linux_setup_tag_info_global(char *p)
1031{
1032 int tags, i, j;
1da177e4 1033
73a25462 1034 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
48813cf9 1035 printk("Setting Global Tags= %d\n", tags);
73a25462 1036
6391a113 1037 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
73a25462
HR		 1038 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1039 aic79xx_tag_info[i].tag_commands[j] = tags;
1da177e4 1040 }
1da177e4 1041 }
1da177e4
LT		 1042}
1043
1da177e4 1044static void
73a25462 1045ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1da177e4 1046{
1da177e4 1047
73a25462 1048 if ((instance >= 0) && (targ >= 0)
6391a113 1049 && (instance < ARRAY_SIZE(aic79xx_tag_info))
73a25462
HR		 1050 && (targ < AHD_NUM_TARGETS)) {
1051 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1052 if (bootverbose)
48813cf9 1053 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1da177e4 1054 }
1da177e4
LT		 1055}
1056
1ff92730
CH		 1057static char *
1058ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1059 void (*callback)(u_long, int, int, int32_t),
1060 u_long callback_arg)
1061{
1062 char *tok_end;
1063 char *tok_end2;
1064 int i;
1065 int instance;
1066 int targ;
1067 int done;
1068 char tok_list[] = {'.', ',', '{', '}', '\0'};
1069
1070 /* All options use a ':' name/arg separator */
1071 if (*opt_arg != ':')
1072 return (opt_arg);
1073 opt_arg++;
1074 instance = -1;
1075 targ = -1;
1076 done = FALSE;
1077 /*
1078 * Restore separator that may be in
1079 * the middle of our option argument.
1080 */
1081 tok_end = strchr(opt_arg, '\0');
1082 if (tok_end < end)
1083 *tok_end = ',';
1084 while (!done) {
1085 switch (*opt_arg) {
1086 case '{':
1087 if (instance == -1) {
1088 instance = 0;
1089 } else {
1090 if (depth > 1) {
1091 if (targ == -1)
1092 targ = 0;
1093 } else {
48813cf9 1094 printk("Malformed Option %s\n",
1ff92730
CH		 1095 opt_name);
1096 done = TRUE;
1097 }
1098 }
1099 opt_arg++;
1100 break;
1101 case '}':
1102 if (targ != -1)
1103 targ = -1;
1104 else if (instance != -1)
1105 instance = -1;
1106 opt_arg++;
1107 break;
1108 case ',':
1109 case '.':
1110 if (instance == -1)
1111 done = TRUE;
1112 else if (targ >= 0)
1113 targ++;
1114 else if (instance >= 0)
1115 instance++;
1116 opt_arg++;
1117 break;
1118 case '\0':
1119 done = TRUE;
1120 break;
1121 default:
1122 tok_end = end;
1123 for (i = 0; tok_list[i]; i++) {
1124 tok_end2 = strchr(opt_arg, tok_list[i]);
1125 if ((tok_end2) && (tok_end2 < tok_end))
1126 tok_end = tok_end2;
1127 }
1128 callback(callback_arg, instance, targ,
1129 simple_strtol(opt_arg, NULL, 0));
1130 opt_arg = tok_end;
1131 break;
1132 }
1133 }
1134 return (opt_arg);
1135}
1136
1da177e4 1137/*
73a25462
HR		 1138 * Handle Linux boot parameters. This routine allows for assigning a value
1139 * to a parameter with a ':' between the parameter and the value.
1140 * ie. aic79xx=stpwlev:1,extended
1da177e4
LT		 1141 */
1142static int
73a25462 1143aic79xx_setup(char *s)
1da177e4 1144{
73a25462
HR		 1145 int i, n;
1146 char *p;
1147 char *end;
1da177e4 1148
980b306a 1149 static const struct {
73a25462
HR		 1150 const char *name;
1151 uint32_t *flag;
1152 } options[] = {
1153 { "extended", &aic79xx_extended },
1154 { "no_reset", &aic79xx_no_reset },
1155 { "verbose", &aic79xx_verbose },
1156 { "allow_memio", &aic79xx_allow_memio},
1da177e4 1157#ifdef AHD_DEBUG
73a25462 1158 { "debug", &ahd_debug },
1da177e4 1159#endif
73a25462
HR		 1160 { "periodic_otag", &aic79xx_periodic_otag },
1161 { "pci_parity", &aic79xx_pci_parity },
1162 { "seltime", &aic79xx_seltime },
1163 { "tag_info", NULL },
1164 { "global_tag_depth", NULL},
1165 { "slewrate", NULL },
1166 { "precomp", NULL },
1167 { "amplitude", NULL },
3fb08612 1168 { "slowcrc", &aic79xx_slowcrc },
73a25462 1169 };
1da177e4 1170
73a25462 1171 end = strchr(s, '\0');
1da177e4 1172
73a25462 1173 /*
6391a113 1174 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
73a25462 1175 * will never be 0 in this case.
6391a113
TK		 1176 */
1177 n = 0;
73a25462
HR		 1178
1179 while ((p = strsep(&s, ",.")) != NULL) {
1180 if (*p == '\0')
1181 continue;
6391a113 1182 for (i = 0; i < ARRAY_SIZE(options); i++) {
73a25462
HR		 1183
1184 n = strlen(options[i].name);
1185 if (strncmp(options[i].name, p, n) == 0)
1186 break;
1187 }
6391a113 1188 if (i == ARRAY_SIZE(options))
73a25462
HR		 1189 continue;
1190
1191 if (strncmp(p, "global_tag_depth", n) == 0) {
1192 ahd_linux_setup_tag_info_global(p + n);
1193 } else if (strncmp(p, "tag_info", n) == 0) {
1ff92730 1194 s = ahd_parse_brace_option("tag_info", p + n, end,
73a25462
HR		 1195 2, ahd_linux_setup_tag_info, 0);
1196 } else if (strncmp(p, "slewrate", n) == 0) {
1ff92730 1197 s = ahd_parse_brace_option("slewrate",
73a25462
HR		 1198 p + n, end, 1, ahd_linux_setup_iocell_info,
1199 AIC79XX_SLEWRATE_INDEX);
1200 } else if (strncmp(p, "precomp", n) == 0) {
1ff92730 1201 s = ahd_parse_brace_option("precomp",
73a25462
HR		 1202 p + n, end, 1, ahd_linux_setup_iocell_info,
1203 AIC79XX_PRECOMP_INDEX);
1204 } else if (strncmp(p, "amplitude", n) == 0) {
1ff92730 1205 s = ahd_parse_brace_option("amplitude",
73a25462
HR		 1206 p + n, end, 1, ahd_linux_setup_iocell_info,
1207 AIC79XX_AMPLITUDE_INDEX);
1208 } else if (p[n] == ':') {
1209 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1210 } else if (!strncmp(p, "verbose", n)) {
1211 *(options[i].flag) = 1;
1212 } else {
1213 *(options[i].flag) ^= 0xFFFFFFFF;
1214 }
1215 }
1216 return 1;
1da177e4
LT		 1217}
1218
73a25462
HR		 1219__setup("aic79xx=", aic79xx_setup);
1220
1221uint32_t aic79xx_verbose;
1da177e4 1222
1da177e4 1223int
73a25462 1224ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1da177e4 1225{
73a25462
HR		 1226 char buf[80];
1227 struct Scsi_Host *host;
1228 char *new_name;
1229 u_long s;
e7a1ca1d 1230 int retval;
1da177e4 1231
73a25462
HR		 1232 template->name = ahd->description;
1233 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1234 if (host == NULL)
1da177e4
LT		 1235 return (ENOMEM);
1236
73a25462 1237 *((struct ahd_softc **)host->hostdata) = ahd;
73a25462
HR		 1238 ahd->platform_data->host = host;
1239 host->can_queue = AHD_MAX_QUEUE;
1240 host->cmd_per_lun = 2;
1241 host->sg_tablesize = AHD_NSEG;
1242 host->this_id = ahd->our_id;
1243 host->irq = ahd->platform_data->irq;
1244 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1245 host->max_lun = AHD_NUM_LUNS;
1246 host->max_channel = 0;
1247 host->sg_tablesize = AHD_NSEG;
eb221849 1248 ahd_lock(ahd, &s);
85a46523 1249 ahd_set_unit(ahd, ahd_linux_unit++);
eb221849 1250 ahd_unlock(ahd, &s);
73a25462 1251 sprintf(buf, "scsi%d", host->host_no);
48813cf9 1252 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
73a25462
HR		 1253 if (new_name != NULL) {
1254 strcpy(new_name, buf);
1255 ahd_set_name(ahd, new_name);
1256 }
1257 host->unique_id = ahd->unit;
1258 ahd_linux_initialize_scsi_bus(ahd);
1259 ahd_intr_enable(ahd, TRUE);
73a25462
HR		 1260
1261 host->transportt = ahd_linux_transport_template;
1262
e7a1ca1d
JJ		 1263 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1264 if (retval) {
1265 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1266 scsi_host_put(host);
1267 return retval;
1268 }
1269
73a25462 1270 scsi_scan_host(host);
e7a1ca1d 1271 return 0;
1da177e4
LT		 1272}
1273
73a25462
HR		 1274/*
1275 * Place the SCSI bus into a known state by either resetting it,
1276 * or forcing transfer negotiations on the next command to any
1277 * target.
1278 */
1279static void
1280ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1da177e4 1281{
73a25462
HR		 1282 u_int target_id;
1283 u_int numtarg;
eb221849 1284 unsigned long s;
1da177e4 1285
73a25462
HR		 1286 target_id = 0;
1287 numtarg = 0;
1288
1289 if (aic79xx_no_reset != 0)
1290 ahd->flags &= ~AHD_RESET_BUS_A;
1291
1292 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1293 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1294 else
1295 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1da177e4 1296
eb221849
HR		 1297 ahd_lock(ahd, &s);
1298
1da177e4 1299 /*
73a25462
HR		 1300 * Force negotiation to async for all targets that
1301 * will not see an initial bus reset.
1da177e4 1302 */
73a25462
HR		 1303 for (; target_id < numtarg; target_id++) {
1304 struct ahd_devinfo devinfo;
1305 struct ahd_initiator_tinfo *tinfo;
1306 struct ahd_tmode_tstate *tstate;
1307
1308 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1309 target_id, &tstate);
1310 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1311 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1312 ahd_update_neg_request(ahd, &devinfo, tstate,
1313 tinfo, AHD_NEG_ALWAYS);
1314 }
eb221849 1315 ahd_unlock(ahd, &s);
73a25462
HR		 1316 /* Give the bus some time to recover */
1317 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1318 ahd_freeze_simq(ahd);
eb221849
HR		 1319 msleep(AIC79XX_RESET_DELAY);
1320 ahd_release_simq(ahd);
73a25462 1321 }
1da177e4
LT		 1322}
1323
1324int
73a25462 1325ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1da177e4 1326{
73a25462 1327 ahd->platform_data =
48813cf9 1328 kmalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
73a25462
HR		 1329 if (ahd->platform_data == NULL)
1330 return (ENOMEM);
1331 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1332 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1333 ahd_lockinit(ahd);
73a25462 1334 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1da177e4
LT		 1335 return (0);
1336}
1337
73a25462
HR		 1338void
1339ahd_platform_free(struct ahd_softc *ahd)
1da177e4 1340{
73a25462 1341 struct scsi_target *starget;
f89d0a4e 1342 int i;
1da177e4 1343
73a25462 1344 if (ahd->platform_data != NULL) {
73a25462
HR		 1345 /* destroy all of the device and target objects */
1346 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1347 starget = ahd->platform_data->starget[i];
1348 if (starget != NULL) {
73a25462
HR		 1349 ahd->platform_data->starget[i] = NULL;
1350 }
1351 }
1da177e4 1352
73a25462
HR		 1353 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1354 free_irq(ahd->platform_data->irq, ahd);
1355 if (ahd->tags[0] == BUS_SPACE_PIO
1356 && ahd->bshs[0].ioport != 0)
1357 release_region(ahd->bshs[0].ioport, 256);
1358 if (ahd->tags[1] == BUS_SPACE_PIO
1359 && ahd->bshs[1].ioport != 0)
1360 release_region(ahd->bshs[1].ioport, 256);
1361 if (ahd->tags[0] == BUS_SPACE_MEMIO
1362 && ahd->bshs[0].maddr != NULL) {
1363 iounmap(ahd->bshs[0].maddr);
1364 release_mem_region(ahd->platform_data->mem_busaddr,
1365 0x1000);
1366 }
97af50f6
JB		 1367 if (ahd->platform_data->host)
1368 scsi_host_put(ahd->platform_data->host);
1369
48813cf9 1370 kfree(ahd->platform_data);
73a25462 1371 }
1da177e4
LT		 1372}
1373
73a25462
HR		 1374void
1375ahd_platform_init(struct ahd_softc *ahd)
1da177e4 1376{
73a25462
HR		 1377 /*
1378 * Lookup and commit any modified IO Cell options.
1379 */
6391a113 1380 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
980b306a 1381 const struct ahd_linux_iocell_opts *iocell_opts;
1da177e4 1382
73a25462
HR		 1383 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1384 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1385 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1386 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1387 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1388 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1389 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1da177e4 1390 }
1da177e4 1391
1da177e4
LT		 1392}
1393
73a25462
HR		 1394void
1395ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1da177e4 1396{
73a25462
HR		 1397 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1398 SCB_GET_CHANNEL(ahd, scb),
1399 SCB_GET_LUN(scb), SCB_LIST_NULL,
1400 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1da177e4
LT		 1401}
1402
73a25462 1403void
f89d0a4e
HR		 1404ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1405 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1da177e4 1406{
73a25462 1407 struct ahd_linux_device *dev;
73a25462
HR		 1408 int was_queuing;
1409 int now_queuing;
1da177e4 1410
73a25462
HR		 1411 if (sdev == NULL)
1412 return;
1da177e4 1413
73a25462 1414 dev = scsi_transport_device_data(sdev);
1da177e4 1415
73a25462
HR		 1416 if (dev == NULL)
1417 return;
1418 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1419 switch (alg) {
1420 default:
1421 case AHD_QUEUE_NONE:
1422 now_queuing = 0;
1423 break;
1424 case AHD_QUEUE_BASIC:
1425 now_queuing = AHD_DEV_Q_BASIC;
1426 break;
1427 case AHD_QUEUE_TAGGED:
1428 now_queuing = AHD_DEV_Q_TAGGED;
1429 break;
1430 }
1431 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1432 && (was_queuing != now_queuing)
1433 && (dev->active != 0)) {
1434 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1435 dev->qfrozen++;
1da177e4 1436 }
1da177e4 1437
73a25462
HR		 1438 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1439 if (now_queuing) {
1440 u_int usertags;
1da177e4 1441
73a25462
HR		 1442 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1443 if (!was_queuing) {
1444 /*
25985edc 1445 * Start out aggressively and allow our
73a25462
HR		 1446 * dynamic queue depth algorithm to take
1447 * care of the rest.
1448 */
1449 dev->maxtags = usertags;
1450 dev->openings = dev->maxtags - dev->active;
1da177e4 1451 }
73a25462
HR		 1452 if (dev->maxtags == 0) {
1453 /*
1454 * Queueing is disabled by the user.
1455 */
1456 dev->openings = 1;
1457 } else if (alg == AHD_QUEUE_TAGGED) {
1458 dev->flags |= AHD_DEV_Q_TAGGED;
1459 if (aic79xx_periodic_otag != 0)
1460 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1461 } else
1462 dev->flags |= AHD_DEV_Q_BASIC;
1463 } else {
1464 /* We can only have one opening. */
1465 dev->maxtags = 0;
1466 dev->openings = 1 - dev->active;
1da177e4 1467 }
1da177e4 1468
73a25462
HR		 1469 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1470 case AHD_DEV_Q_BASIC:
0aa800db
HR		 1471 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1472 scsi_activate_tcq(sdev, dev->openings + dev->active);
73a25462
HR		 1473 break;
1474 case AHD_DEV_Q_TAGGED:
0aa800db
HR		 1475 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1476 scsi_activate_tcq(sdev, dev->openings + dev->active);
73a25462
HR		 1477 break;
1478 default:
1da177e4 1479 /*
73a25462
HR		 1480 * We allow the OS to queue 2 untagged transactions to
1481 * us at any time even though we can only execute them
1482 * serially on the controller/device. This should
1483 * remove some latency.
1da177e4 1484 */
0aa800db 1485 scsi_deactivate_tcq(sdev, 1);
73a25462 1486 break;
1da177e4 1487 }
1da177e4
LT		 1488}
1489
73a25462
HR		 1490int
1491ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1492 int lun, u_int tag, role_t role, uint32_t status)
1da177e4 1493{
73a25462 1494 return 0;
1da177e4
LT		 1495}
1496
73a25462
HR		 1497static u_int
1498ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1da177e4 1499{
73a25462
HR		 1500 static int warned_user;
1501 u_int tags;
1da177e4 1502
73a25462
HR		 1503 tags = 0;
1504 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
6391a113 1505 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
73a25462
HR		 1506
1507 if (warned_user == 0) {
48813cf9 1508 printk(KERN_WARNING
73a25462
HR		 1509"aic79xx: WARNING: Insufficient tag_info instances\n"
1510"aic79xx: for installed controllers. Using defaults\n"
1511"aic79xx: Please update the aic79xx_tag_info array in\n"
1512"aic79xx: the aic79xx_osm.c source file.\n");
1513 warned_user++;
1514 }
1515 tags = AHD_MAX_QUEUE;
1516 } else {
1517 adapter_tag_info_t *tag_info;
1518
1519 tag_info = &aic79xx_tag_info[ahd->unit];
1520 tags = tag_info->tag_commands[devinfo->target_offset];
1521 if (tags > AHD_MAX_QUEUE)
1522 tags = AHD_MAX_QUEUE;
1da177e4
LT		 1523 }
1524 }
73a25462 1525 return (tags);
1da177e4
LT		 1526}
1527
1528/*
73a25462 1529 * Determines the queue depth for a given device.
1da177e4
LT		 1530 */
1531static void
73a25462 1532ahd_linux_device_queue_depth(struct scsi_device *sdev)
1da177e4 1533{
73a25462
HR		 1534 struct ahd_devinfo devinfo;
1535 u_int tags;
1536 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1da177e4 1537
73a25462
HR		 1538 ahd_compile_devinfo(&devinfo,
1539 ahd->our_id,
1540 sdev->sdev_target->id, sdev->lun,
1541 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1542 ROLE_INITIATOR);
1543 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1544 if (tags != 0 && sdev->tagged_supported != 0) {
1da177e4 1545
f89d0a4e
HR		 1546 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1547 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1548 devinfo.lun, AC_TRANSFER_NEG);
73a25462 1549 ahd_print_devinfo(ahd, &devinfo);
48813cf9 1550 printk("Tagged Queuing enabled. Depth %d\n", tags);
73a25462 1551 } else {
f89d0a4e
HR		 1552 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1553 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1554 devinfo.lun, AC_TRANSFER_NEG);
73a25462
HR		 1555 }
1556}
1da177e4 1557
73a25462
HR		 1558static int
1559ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1560 struct scsi_cmnd *cmd)
1561{
1562 struct scb *scb;
1563 struct hardware_scb *hscb;
1564 struct ahd_initiator_tinfo *tinfo;
1565 struct ahd_tmode_tstate *tstate;
1566 u_int col_idx;
1567 uint16_t mask;
7b22da38 1568 unsigned long flags;
4c688fc7 1569 int nseg;
7b22da38 1570
2505873a
FT		 1571 nseg = scsi_dma_map(cmd);
1572 if (nseg < 0)
1573 return SCSI_MLQUEUE_HOST_BUSY;
1574
7b22da38 1575 ahd_lock(ahd, &flags);
1da177e4
LT		 1576
1577 /*
73a25462 1578 * Get an scb to use.
1da177e4 1579 */
73a25462
HR		 1580 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1581 cmd->device->id, &tstate);
1582 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1583 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1584 col_idx = AHD_NEVER_COL_IDX;
1585 } else {
1586 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1587 cmd->device->lun);
1588 }
1589 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1590 ahd->flags |= AHD_RESOURCE_SHORTAGE;
7b22da38 1591 ahd_unlock(ahd, &flags);
2505873a 1592 scsi_dma_unmap(cmd);
73a25462 1593 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1594 }
1da177e4 1595
73a25462
HR		 1596 scb->io_ctx = cmd;
1597 scb->platform_data->dev = dev;
1598 hscb = scb->hscb;
1599 cmd->host_scribble = (char *)scb;
1da177e4 1600
73a25462
HR		 1601 /*
1602 * Fill out basics of the HSCB.
1603 */
1604 hscb->control = 0;
1605 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1606 hscb->lun = cmd->device->lun;
1607 scb->hscb->task_management = 0;
1608 mask = SCB_GET_TARGET_MASK(ahd, scb);
1da177e4 1609
73a25462
HR		 1610 if ((ahd->user_discenable & mask) != 0)
1611 hscb->control |= DISCENB;
1da177e4 1612
73a25462
HR		 1613 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1614 scb->flags |= SCB_PACKETIZED;
1da177e4 1615
73a25462
HR		 1616 if ((tstate->auto_negotiate & mask) != 0) {
1617 scb->flags |= SCB_AUTO_NEGOTIATE;
1618 scb->hscb->control |= MK_MESSAGE;
1619 }
1620
1621 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1622 int msg_bytes;
1623 uint8_t tag_msgs[2];
1624
1625 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1626 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1627 hscb->control |= tag_msgs[0];
1628 if (tag_msgs[0] == MSG_ORDERED_TASK)
1629 dev->commands_since_idle_or_otag = 0;
1630 } else
1631 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1632 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1633 hscb->control |= MSG_ORDERED_TASK;
1634 dev->commands_since_idle_or_otag = 0;
1635 } else {
1636 hscb->control |= MSG_SIMPLE_TASK;
1da177e4 1637 }
73a25462 1638 }
1da177e4 1639
73a25462
HR		 1640 hscb->cdb_len = cmd->cmd_len;
1641 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1642
1643 scb->platform_data->xfer_len = 0;
1644 ahd_set_residual(scb, 0);
1645 ahd_set_sense_residual(scb, 0);
1646 scb->sg_count = 0;
4c688fc7 1647
4c688fc7
FT		 1648 if (nseg > 0) {
1649 void *sg = scb->sg_list;
1650 struct scatterlist *cur_seg;
1651 int i;
1652
73a25462 1653 scb->platform_data->xfer_len = 0;
4c688fc7
FT		 1654
1655 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
73a25462
HR		 1656 dma_addr_t addr;
1657 bus_size_t len;
1658
1659 addr = sg_dma_address(cur_seg);
1660 len = sg_dma_len(cur_seg);
1661 scb->platform_data->xfer_len += len;
1662 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
4c688fc7 1663 i == (nseg - 1));
1da177e4 1664 }
1da177e4 1665 }
73a25462
HR		 1666
1667 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1668 dev->openings--;
1669 dev->active++;
1670 dev->commands_issued++;
1671
1672 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1673 dev->commands_since_idle_or_otag++;
1674 scb->flags |= SCB_ACTIVE;
1675 ahd_queue_scb(ahd, scb);
1676
7b22da38
HR		 1677 ahd_unlock(ahd, &flags);
1678
73a25462 1679 return 0;
1da177e4
LT		 1680}
1681
73a25462
HR		 1682/*
1683 * SCSI controller interrupt handler.
1684 */
1685irqreturn_t
7d12e780 1686ahd_linux_isr(int irq, void *dev_id)
1da177e4 1687{
73a25462
HR		 1688 struct ahd_softc *ahd;
1689 u_long flags;
1690 int ours;
1da177e4 1691
73a25462
HR		 1692 ahd = (struct ahd_softc *) dev_id;
1693 ahd_lock(ahd, &flags);
1694 ours = ahd_intr(ahd);
1695 ahd_unlock(ahd, &flags);
1696 return IRQ_RETVAL(ours);
1da177e4
LT		 1697}
1698
1da177e4 1699void
73a25462 1700ahd_send_async(struct ahd_softc *ahd, char channel,
f89d0a4e 1701 u_int target, u_int lun, ac_code code)
1da177e4 1702{
73a25462
HR		 1703 switch (code) {
1704 case AC_TRANSFER_NEG:
1705 {
73a25462 1706 struct scsi_target *starget;
73a25462
HR		 1707 struct ahd_initiator_tinfo *tinfo;
1708 struct ahd_tmode_tstate *tstate;
1709 unsigned int target_ppr_options;
1da177e4 1710
73a25462
HR		 1711 BUG_ON(target == CAM_TARGET_WILDCARD);
1712
73a25462
HR		 1713 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1714 target, &tstate);
1715
1716 /*
1717 * Don't bother reporting results while
1718 * negotiations are still pending.
1719 */
1720 if (tinfo->curr.period != tinfo->goal.period
1721 || tinfo->curr.width != tinfo->goal.width
1722 || tinfo->curr.offset != tinfo->goal.offset
1723 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1724 if (bootverbose == 0)
1725 break;
1726
1727 /*
1728 * Don't bother reporting results that
1729 * are identical to those last reported.
1730 */
1731 starget = ahd->platform_data->starget[target];
fc789a93 1732 if (starget == NULL)
73a25462
HR		 1733 break;
1734
1735 target_ppr_options =
1736 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1737 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
3f40d7d6
JB		 1738 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1739 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1740 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1741 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
88ff29a4
JB		 1742 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1743 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
73a25462
HR		 1744
1745 if (tinfo->curr.period == spi_period(starget)
1746 && tinfo->curr.width == spi_width(starget)
1747 && tinfo->curr.offset == spi_offset(starget)
1748 && tinfo->curr.ppr_options == target_ppr_options)
1749 if (bootverbose == 0)
1750 break;
1751
1752 spi_period(starget) = tinfo->curr.period;
1753 spi_width(starget) = tinfo->curr.width;
1754 spi_offset(starget) = tinfo->curr.offset;
a4b53a11
HR		 1755 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1756 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1757 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
3f40d7d6
JB		 1758 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1759 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1760 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1761 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
88ff29a4 1762 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
73a25462 1763 spi_display_xfer_agreement(starget);
1da177e4 1764 break;
73a25462
HR		 1765 }
1766 case AC_SENT_BDR:
1767 {
1768 WARN_ON(lun != CAM_LUN_WILDCARD);
1769 scsi_report_device_reset(ahd->platform_data->host,
1770 channel - 'A', target);
1da177e4
LT		 1771 break;
1772 }
73a25462
HR		 1773 case AC_BUS_RESET:
1774 if (ahd->platform_data->host != NULL) {
1775 scsi_report_bus_reset(ahd->platform_data->host,
1776 channel - 'A');
1da177e4 1777 }
73a25462
HR		 1778 break;
1779 default:
1780 panic("ahd_send_async: Unexpected async event");
1781 }
1da177e4
LT		 1782}
1783
73a25462
HR		 1784/*
1785 * Calls the higher level scsi done function and frees the scb.
1786 */
1787void
1788ahd_done(struct ahd_softc *ahd, struct scb *scb)
1da177e4 1789{
73a25462
HR		 1790 struct scsi_cmnd *cmd;
1791 struct ahd_linux_device *dev;
1da177e4 1792
73a25462 1793 if ((scb->flags & SCB_ACTIVE) == 0) {
48813cf9 1794 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
73a25462
HR		 1795 ahd_dump_card_state(ahd);
1796 panic("Stopping for safety");
1da177e4 1797 }
73a25462
HR		 1798 LIST_REMOVE(scb, pending_links);
1799 cmd = scb->io_ctx;
1800 dev = scb->platform_data->dev;
1801 dev->active--;
1802 dev->openings++;
1803 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1804 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1805 dev->qfrozen--;
1806 }
1807 ahd_linux_unmap_scb(ahd, scb);
1da177e4
LT		 1808
1809 /*
73a25462
HR		 1810 * Guard against stale sense data.
1811 * The Linux mid-layer assumes that sense
1812 * was retrieved anytime the first byte of
1813 * the sense buffer looks "sane".
1da177e4 1814 */
73a25462
HR		 1815 cmd->sense_buffer[0] = 0;
1816 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1817 uint32_t amount_xferred;
1da177e4 1818
73a25462
HR		 1819 amount_xferred =
1820 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1821 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1da177e4 1822#ifdef AHD_DEBUG
73a25462
HR		 1823 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1824 ahd_print_path(ahd, scb);
48813cf9 1825 printk("Set CAM_UNCOR_PARITY\n");
73a25462 1826 }
1da177e4 1827#endif
73a25462
HR		 1828 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1829#ifdef AHD_REPORT_UNDERFLOWS
1da177e4 1830 /*
73a25462
HR		 1831 * This code is disabled by default as some
1832 * clients of the SCSI system do not properly
1833 * initialize the underflow parameter. This
1834 * results in spurious termination of commands
1835 * that complete as expected (e.g. underflow is
1836 * allowed as command can return variable amounts
1837 * of data.
1da177e4 1838 */
73a25462
HR		 1839 } else if (amount_xferred < scb->io_ctx->underflow) {
1840 u_int i;
1da177e4 1841
73a25462 1842 ahd_print_path(ahd, scb);
48813cf9 1843 printk("CDB:");
73a25462 1844 for (i = 0; i < scb->io_ctx->cmd_len; i++)
48813cf9
PE		 1845 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1846 printk("\n");
73a25462 1847 ahd_print_path(ahd, scb);
48813cf9 1848 printk("Saw underflow (%ld of %ld bytes). "
73a25462
HR		 1849 "Treated as error\n",
1850 ahd_get_residual(scb),
1851 ahd_get_transfer_length(scb));
1852 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1853#endif
1854 } else {
1855 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1da177e4 1856 }
73a25462
HR		 1857 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1858 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1859 }
1da177e4 1860
73a25462
HR		 1861 if (dev->openings == 1
1862 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1863 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1864 dev->tag_success_count++;
1865 /*
1866 * Some devices deal with temporary internal resource
1867 * shortages by returning queue full. When the queue
1868 * full occurrs, we throttle back. Slowly try to get
1869 * back to our previous queue depth.
1870 */
1871 if ((dev->openings + dev->active) < dev->maxtags
1872 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1873 dev->tag_success_count = 0;
1874 dev->openings++;
1875 }
1da177e4 1876
73a25462
HR		 1877 if (dev->active == 0)
1878 dev->commands_since_idle_or_otag = 0;
1da177e4 1879
73a25462 1880 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
48813cf9 1881 printk("Recovery SCB completes\n");
73a25462
HR		 1882 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1883 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1884 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
7b22da38
HR		 1885
1886 if (ahd->platform_data->eh_done)
1887 complete(ahd->platform_data->eh_done);
1da177e4 1888 }
73a25462
HR		 1889
1890 ahd_free_scb(ahd, scb);
1891 ahd_linux_queue_cmd_complete(ahd, cmd);
1da177e4
LT		 1892}
1893
1894static void
73a25462
HR		 1895ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1896 struct scsi_device *sdev, struct scb *scb)
1da177e4 1897{
73a25462
HR		 1898 struct ahd_devinfo devinfo;
1899 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1da177e4 1900
73a25462
HR		 1901 ahd_compile_devinfo(&devinfo,
1902 ahd->our_id,
1903 sdev->sdev_target->id, sdev->lun,
1904 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1905 ROLE_INITIATOR);
1906
1907 /*
1908 * We don't currently trust the mid-layer to
1909 * properly deal with queue full or busy. So,
1910 * when one occurs, we tell the mid-layer to
1911 * unconditionally requeue the command to us
1912 * so that we can retry it ourselves. We also
1913 * implement our own throttling mechanism so
1914 * we don't clobber the device with too many
1915 * commands.
1916 */
1917 switch (ahd_get_scsi_status(scb)) {
1918 default:
1919 break;
1920 case SCSI_STATUS_CHECK_COND:
1921 case SCSI_STATUS_CMD_TERMINATED:
1922 {
1923 struct scsi_cmnd *cmd;
1da177e4
LT		 1924
1925 /*
73a25462
HR		 1926 * Copy sense information to the OS's cmd
1927 * structure if it is available.
1da177e4 1928 */
73a25462
HR		 1929 cmd = scb->io_ctx;
1930 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1931 struct scsi_status_iu_header *siu;
1932 u_int sense_size;
1933 u_int sense_offset;
1da177e4 1934
73a25462 1935 if (scb->flags & SCB_SENSE) {
6d07cb71 1936 sense_size = min(sizeof(struct scsi_sense_data)
73a25462 1937 - ahd_get_sense_residual(scb),
b80ca4f7 1938 (u_long)SCSI_SENSE_BUFFERSIZE);
73a25462
HR		 1939 sense_offset = 0;
1940 } else {
1941 /*
1942 * Copy only the sense data into the provided
1943 * buffer.
1944 */
1945 siu = (struct scsi_status_iu_header *)
1946 scb->sense_data;
6d07cb71
AL		 1947 sense_size = min_t(size_t,
1948 scsi_4btoul(siu->sense_length),
b80ca4f7 1949 SCSI_SENSE_BUFFERSIZE);
73a25462
HR		 1950 sense_offset = SIU_SENSE_OFFSET(siu);
1951 }
1da177e4 1952
b80ca4f7 1953 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
73a25462
HR		 1954 memcpy(cmd->sense_buffer,
1955 ahd_get_sense_buf(ahd, scb)
1956 + sense_offset, sense_size);
1957 cmd->result |= (DRIVER_SENSE << 24);
1da177e4 1958
1da177e4 1959#ifdef AHD_DEBUG
73a25462
HR		 1960 if (ahd_debug & AHD_SHOW_SENSE) {
1961 int i;
1da177e4 1962
48813cf9 1963 printk("Copied %d bytes of sense data at %d:",
73a25462
HR		 1964 sense_size, sense_offset);
1965 for (i = 0; i < sense_size; i++) {
1da177e4 1966 if ((i & 0xF) == 0)
48813cf9
PE		 1967 printk("\n");
1968 printk("0x%x ", cmd->sense_buffer[i]);
1da177e4 1969 }
48813cf9 1970 printk("\n");
1da177e4
LT		 1971 }
1972#endif
1da177e4
LT		 1973 }
1974 break;
73a25462
HR		 1975 }
1976 case SCSI_STATUS_QUEUE_FULL:
1977 /*
1978 * By the time the core driver has returned this
1979 * command, all other commands that were queued
1980 * to us but not the device have been returned.
1981 * This ensures that dev->active is equal to
1982 * the number of commands actually queued to
1983 * the device.
1984 */
1985 dev->tag_success_count = 0;
1986 if (dev->active != 0) {
1da177e4 1987 /*
73a25462
HR		 1988 * Drop our opening count to the number
1989 * of commands currently outstanding.
1da177e4 1990 */
73a25462 1991 dev->openings = 0;
1da177e4 1992#ifdef AHD_DEBUG
73a25462
HR		 1993 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1994 ahd_print_path(ahd, scb);
48813cf9 1995 printk("Dropping tag count to %d\n",
73a25462 1996 dev->active);
1da177e4
LT		 1997 }
1998#endif
73a25462 1999 if (dev->active == dev->tags_on_last_queuefull) {
1da177e4 2000
73a25462 2001 dev->last_queuefull_same_count++;
1da177e4 2002 /*
73a25462
HR		 2003 * If we repeatedly see a queue full
2004 * at the same queue depth, this
2005 * device has a fixed number of tag
2006 * slots. Lock in this tag depth
2007 * so we stop seeing queue fulls from
2008 * this device.
1da177e4 2009 */
73a25462
HR		 2010 if (dev->last_queuefull_same_count
2011 == AHD_LOCK_TAGS_COUNT) {
2012 dev->maxtags = dev->active;
2013 ahd_print_path(ahd, scb);
48813cf9 2014 printk("Locking max tag count at %d\n",
73a25462 2015 dev->active);
1da177e4 2016 }
73a25462
HR		 2017 } else {
2018 dev->tags_on_last_queuefull = dev->active;
2019 dev->last_queuefull_same_count = 0;
1da177e4 2020 }
73a25462
HR		 2021 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
2022 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
f89d0a4e 2023 ahd_platform_set_tags(ahd, sdev, &devinfo,
73a25462
HR		 2024 (dev->flags & AHD_DEV_Q_BASIC)
2025 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1da177e4
LT		 2026 break;
2027 }
1da177e4 2028 /*
73a25462
HR		 2029 * Drop down to a single opening, and treat this
2030 * as if the target returned BUSY SCSI status.
1da177e4 2031 */
73a25462 2032 dev->openings = 1;
f89d0a4e 2033 ahd_platform_set_tags(ahd, sdev, &devinfo,
73a25462
HR		 2034 (dev->flags & AHD_DEV_Q_BASIC)
2035 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2036 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2037 }
1da177e4
LT		 2038}
2039
73a25462
HR		 2040static void
2041ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1da177e4 2042{
6902f416
HR		 2043 int status;
2044 int new_status = DID_OK;
2045 int do_fallback = 0;
2046 int scsi_status;
2047
1da177e4 2048 /*
73a25462
HR		 2049 * Map CAM error codes into Linux Error codes. We
2050 * avoid the conversion so that the DV code has the
2051 * full error information available when making
2052 * state change decisions.
1da177e4 2053 */
6902f416
HR		 2054
2055 status = ahd_cmd_get_transaction_status(cmd);
2056 switch (status) {
2057 case CAM_REQ_INPROG:
2058 case CAM_REQ_CMP:
2059 new_status = DID_OK;
2060 break;
2061 case CAM_AUTOSENSE_FAIL:
2062 new_status = DID_ERROR;
2063 /* Fallthrough */
2064 case CAM_SCSI_STATUS_ERROR:
2065 scsi_status = ahd_cmd_get_scsi_status(cmd);
2066
2067 switch(scsi_status) {
2068 case SCSI_STATUS_CMD_TERMINATED:
2069 case SCSI_STATUS_CHECK_COND:
2070 if ((cmd->result >> 24) != DRIVER_SENSE) {
2071 do_fallback = 1;
2072 } else {
2073 struct scsi_sense_data *sense;
2074
2075 sense = (struct scsi_sense_data *)
c1c9ce52 2076 cmd->sense_buffer;
6902f416
HR		 2077 if (sense->extra_len >= 5 &&
2078 (sense->add_sense_code == 0x47
2079 || sense->add_sense_code == 0x48))
2080 do_fallback = 1;
2081 }
73a25462
HR		 2082 break;
2083 default:
73a25462
HR		 2084 break;
2085 }
6902f416
HR		 2086 break;
2087 case CAM_REQ_ABORTED:
2088 new_status = DID_ABORT;
2089 break;
2090 case CAM_BUSY:
2091 new_status = DID_BUS_BUSY;
2092 break;
2093 case CAM_REQ_INVALID:
2094 case CAM_PATH_INVALID:
2095 new_status = DID_BAD_TARGET;
2096 break;
2097 case CAM_SEL_TIMEOUT:
2098 new_status = DID_NO_CONNECT;
2099 break;
2100 case CAM_SCSI_BUS_RESET:
2101 case CAM_BDR_SENT:
2102 new_status = DID_RESET;
2103 break;
2104 case CAM_UNCOR_PARITY:
2105 new_status = DID_PARITY;
2106 do_fallback = 1;
2107 break;
2108 case CAM_CMD_TIMEOUT:
2109 new_status = DID_TIME_OUT;
2110 do_fallback = 1;
2111 break;
2112 case CAM_REQ_CMP_ERR:
2113 case CAM_UNEXP_BUSFREE:
2114 case CAM_DATA_RUN_ERR:
2115 new_status = DID_ERROR;
2116 do_fallback = 1;
2117 break;
2118 case CAM_UA_ABORT:
2119 case CAM_NO_HBA:
2120 case CAM_SEQUENCE_FAIL:
2121 case CAM_CCB_LEN_ERR:
2122 case CAM_PROVIDE_FAIL:
2123 case CAM_REQ_TERMIO:
2124 case CAM_UNREC_HBA_ERROR:
2125 case CAM_REQ_TOO_BIG:
2126 new_status = DID_ERROR;
2127 break;
2128 case CAM_REQUEUE_REQ:
2129 new_status = DID_REQUEUE;
2130 break;
2131 default:
2132 /* We should never get here */
2133 new_status = DID_ERROR;
2134 break;
2135 }
73a25462 2136
6902f416 2137 if (do_fallback) {
48813cf9 2138 printk("%s: device overrun (status %x) on %d:%d:%d\n",
6902f416
HR		 2139 ahd_name(ahd), status, cmd->device->channel,
2140 cmd->device->id, cmd->device->lun);
73a25462
HR		 2141 }
2142
6902f416
HR		 2143 ahd_cmd_set_transaction_status(cmd, new_status);
2144
73a25462 2145 cmd->scsi_done(cmd);
1da177e4
LT		 2146}
2147
e3e0ca51 2148static void
73a25462 2149ahd_freeze_simq(struct ahd_softc *ahd)
1da177e4 2150{
7b22da38 2151 scsi_block_requests(ahd->platform_data->host);
1da177e4
LT		 2152}
2153
e3e0ca51 2154static void
73a25462 2155ahd_release_simq(struct ahd_softc *ahd)
1da177e4 2156{
7b22da38 2157 scsi_unblock_requests(ahd->platform_data->host);
73a25462 2158}
1da177e4 2159
73a25462 2160static int
6902f416 2161ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
73a25462
HR		 2162{
2163 struct ahd_softc *ahd;
2164 struct ahd_linux_device *dev;
2165 struct scb *pending_scb;
2166 u_int saved_scbptr;
2167 u_int active_scbptr;
2168 u_int last_phase;
2169 u_int saved_scsiid;
2170 u_int cdb_byte;
2171 int retval;
2172 int was_paused;
2173 int paused;
2174 int wait;
2175 int disconnected;
2176 ahd_mode_state saved_modes;
4065a413 2177 unsigned long flags;
73a25462
HR		 2178
2179 pending_scb = NULL;
2180 paused = FALSE;
2181 wait = FALSE;
2182 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2183
017560fc 2184 scmd_printk(KERN_INFO, cmd,
6902f416 2185 "Attempting to queue an ABORT message:");
73a25462 2186
48813cf9 2187 printk("CDB:");
73a25462 2188 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
48813cf9
PE		 2189 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2190 printk("\n");
73a25462 2191
4065a413 2192 ahd_lock(ahd, &flags);
1da177e4 2193
1da177e4 2194 /*
73a25462
HR		 2195 * First determine if we currently own this command.
2196 * Start by searching the device queue. If not found
2197 * there, check the pending_scb list. If not found
2198 * at all, and the system wanted us to just abort the
2199 * command, return success.
1da177e4 2200 */
73a25462
HR		 2201 dev = scsi_transport_device_data(cmd->device);
2202
2203 if (dev == NULL) {
2204 /*
2205 * No target device for this command exists,
2206 * so we must not still own the command.
2207 */
017560fc 2208 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
73a25462
HR		 2209 retval = SUCCESS;
2210 goto no_cmd;
2211 }
1da177e4 2212
1da177e4 2213 /*
73a25462 2214 * See if we can find a matching cmd in the pending list.
1da177e4 2215 */
73a25462
HR		 2216 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2217 if (pending_scb->io_ctx == cmd)
2218 break;
1da177e4
LT		 2219 }
2220
73a25462 2221 if (pending_scb == NULL) {
017560fc 2222 scmd_printk(KERN_INFO, cmd, "Command not found\n");
73a25462 2223 goto no_cmd;
1da177e4 2224 }
1da177e4 2225
73a25462
HR		 2226 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2227 /*
2228 * We can't queue two recovery actions using the same SCB
2229 */
2230 retval = FAILED;
2231 goto done;
2232 }
1da177e4 2233
1da177e4 2234 /*
73a25462
HR		 2235 * Ensure that the card doesn't do anything
2236 * behind our back. Also make sure that we
2237 * didn't "just" miss an interrupt that would
2238 * affect this cmd.
1da177e4 2239 */
73a25462
HR		 2240 was_paused = ahd_is_paused(ahd);
2241 ahd_pause_and_flushwork(ahd);
2242 paused = TRUE;
1da177e4 2243
73a25462 2244 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
017560fc 2245 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
73a25462
HR		 2246 goto no_cmd;
2247 }
1da177e4 2248
48813cf9 2249 printk("%s: At time of recovery, card was %spaused\n",
73a25462
HR		 2250 ahd_name(ahd), was_paused ? "" : "not ");
2251 ahd_dump_card_state(ahd);
1da177e4 2252
73a25462 2253 disconnected = TRUE;
6902f416
HR		 2254 if (ahd_search_qinfifo(ahd, cmd->device->id,
2255 cmd->device->channel + 'A',
2256 cmd->device->lun,
2257 pending_scb->hscb->tag,
2258 ROLE_INITIATOR, CAM_REQ_ABORTED,
2259 SEARCH_COMPLETE) > 0) {
48813cf9 2260 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
6902f416
HR		 2261 ahd_name(ahd), cmd->device->channel,
2262 cmd->device->id, cmd->device->lun);
2263 retval = SUCCESS;
2264 goto done;
73a25462 2265 }
1da177e4 2266
73a25462
HR		 2267 saved_modes = ahd_save_modes(ahd);
2268 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2269 last_phase = ahd_inb(ahd, LASTPHASE);
2270 saved_scbptr = ahd_get_scbptr(ahd);
2271 active_scbptr = saved_scbptr;
6902f416 2272 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
73a25462 2273 struct scb *bus_scb;
1da177e4 2274
73a25462
HR		 2275 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2276 if (bus_scb == pending_scb)
2277 disconnected = FALSE;
1da177e4 2278 }
73a25462
HR		 2279
2280 /*
2281 * At this point, pending_scb is the scb associated with the
2282 * passed in command. That command is currently active on the
2283 * bus or is in the disconnected state.
2284 */
2285 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
6902f416
HR		 2286 if (last_phase != P_BUSFREE
2287 && SCB_GET_TAG(pending_scb) == active_scbptr) {
73a25462 2288
1da177e4 2289 /*
73a25462
HR		 2290 * We're active on the bus, so assert ATN
2291 * and hope that the target responds.
1da177e4 2292 */
73a25462 2293 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
6902f416 2294 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
73a25462
HR		 2295 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2296 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
6902f416 2297 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
73a25462
HR		 2298 wait = TRUE;
2299 } else if (disconnected) {
2300
2301 /*
2302 * Actually re-queue this SCB in an attempt
2303 * to select the device before it reconnects.
2304 */
6902f416 2305 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
73a25462
HR		 2306 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2307 pending_scb->hscb->cdb_len = 0;
2308 pending_scb->hscb->task_attribute = 0;
2309 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2310
2311 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
1da177e4 2312 /*
73a25462
HR		 2313 * Mark the SCB has having an outstanding
2314 * task management function. Should the command
2315 * complete normally before the task management
2316 * function can be sent, the host will be notified
2317 * to abort our requeued SCB.
1da177e4 2318 */
73a25462
HR		 2319 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2320 pending_scb->hscb->task_management);
2321 } else {
2322 /*
2323 * If non-packetized, set the MK_MESSAGE control
2324 * bit indicating that we desire to send a message.
2325 * We also set the disconnected flag since there is
2326 * no guarantee that our SCB control byte matches
2327 * the version on the card. We don't want the
2328 * sequencer to abort the command thinking an
2329 * unsolicited reselection occurred.
2330 */
2331 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2332
2333 /*
2334 * The sequencer will never re-reference the
2335 * in-core SCB. To make sure we are notified
b71a8eb0 2336 * during reselection, set the MK_MESSAGE flag in
73a25462
HR		 2337 * the card's copy of the SCB.
2338 */
2339 ahd_outb(ahd, SCB_CONTROL,
2340 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
1da177e4 2341 }
73a25462 2342
1da177e4 2343 /*
73a25462
HR		 2344 * Clear out any entries in the QINFIFO first
2345 * so we are the next SCB for this target
2346 * to run.
1da177e4 2347 */
73a25462
HR		 2348 ahd_search_qinfifo(ahd, cmd->device->id,
2349 cmd->device->channel + 'A', cmd->device->lun,
2350 SCB_LIST_NULL, ROLE_INITIATOR,
2351 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2352 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2353 ahd_set_scbptr(ahd, saved_scbptr);
2354 ahd_print_path(ahd, pending_scb);
48813cf9 2355 printk("Device is disconnected, re-queuing SCB\n");
73a25462
HR		 2356 wait = TRUE;
2357 } else {
017560fc 2358 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
73a25462
HR		 2359 retval = FAILED;
2360 goto done;
1da177e4 2361 }
1da177e4 2362
73a25462 2363no_cmd:
1da177e4 2364 /*
73a25462
HR		 2365 * Our assumption is that if we don't have the command, no
2366 * recovery action was required, so we return success. Again,
2367 * the semantics of the mid-layer recovery engine are not
2368 * well defined, so this may change in time.
1da177e4 2369 */
73a25462
HR		 2370 retval = SUCCESS;
2371done:
2372 if (paused)
2373 ahd_unpause(ahd);
2374 if (wait) {
6e9a4738 2375 DECLARE_COMPLETION_ONSTACK(done);
1da177e4 2376
7b22da38 2377 ahd->platform_data->eh_done = &done;
4065a413
CH		 2378 ahd_unlock(ahd, &flags);
2379
48813cf9 2380 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
7b22da38
HR		 2381 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2382 ahd_lock(ahd, &flags);
2383 ahd->platform_data->eh_done = NULL;
2384 ahd_unlock(ahd, &flags);
48813cf9 2385 printk("%s: Timer Expired (active %d)\n",
11668bb6 2386 ahd_name(ahd), dev->active);
73a25462 2387 retval = FAILED;
1da177e4 2388 }
48813cf9 2389 printk("Recovery code awake\n");
eb221849
HR		 2390 } else
2391 ahd_unlock(ahd, &flags);
2392
7b22da38 2393 if (retval != SUCCESS)
48813cf9 2394 printk("%s: Command abort returning 0x%x\n",
7b22da38
HR		 2395 ahd_name(ahd), retval);
2396
2397 return retval;
1da177e4
LT		 2398}
2399
73a25462 2400static void ahd_linux_set_width(struct scsi_target *starget, int width)
1da177e4 2401{
73a25462
HR		 2402 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2403 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2404 struct ahd_devinfo devinfo;
2405 unsigned long flags;
1da177e4 2406
73a25462
HR		 2407 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2408 starget->channel + 'A', ROLE_INITIATOR);
2409 ahd_lock(ahd, &flags);
2410 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2411 ahd_unlock(ahd, &flags);
2412}
2413
2414static void ahd_linux_set_period(struct scsi_target *starget, int period)
2415{
2416 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2417 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2418 struct ahd_tmode_tstate *tstate;
2419 struct ahd_initiator_tinfo *tinfo
2420 = ahd_fetch_transinfo(ahd,
2421 starget->channel + 'A',
2422 shost->this_id, starget->id, &tstate);
2423 struct ahd_devinfo devinfo;
2424 unsigned int ppr_options = tinfo->goal.ppr_options;
a4b53a11 2425 unsigned int dt;
73a25462
HR		 2426 unsigned long flags;
2427 unsigned long offset = tinfo->goal.offset;
1da177e4 2428
a4b53a11
HR		 2429#ifdef AHD_DEBUG
2430 if ((ahd_debug & AHD_SHOW_DV) != 0)
48813cf9 2431 printk("%s: set period to %d\n", ahd_name(ahd), period);
a4b53a11 2432#endif
73a25462
HR		 2433 if (offset == 0)
2434 offset = MAX_OFFSET;
1da177e4 2435
73a25462
HR		 2436 if (period < 8)
2437 period = 8;
2438 if (period < 10) {
0f82cb92
JB		 2439 if (spi_max_width(starget)) {
2440 ppr_options |= MSG_EXT_PPR_DT_REQ;
2441 if (period == 8)
2442 ppr_options |= MSG_EXT_PPR_IU_REQ;
2443 } else
2444 period = 10;
1da177e4
LT		 2445 }
2446
a4b53a11
HR		 2447 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2448
73a25462
HR		 2449 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2450 starget->channel + 'A', ROLE_INITIATOR);
1da177e4 2451
73a25462
HR		 2452 /* all PPR requests apart from QAS require wide transfers */
2453 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2454 if (spi_width(starget) == 0)
2455 ppr_options &= MSG_EXT_PPR_QAS_REQ;
1da177e4 2456 }
73a25462 2457
a4b53a11
HR		 2458 ahd_find_syncrate(ahd, &period, &ppr_options,
2459 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2460
73a25462
HR		 2461 ahd_lock(ahd, &flags);
2462 ahd_set_syncrate(ahd, &devinfo, period, offset,
2463 ppr_options, AHD_TRANS_GOAL, FALSE);
2464 ahd_unlock(ahd, &flags);
1da177e4
LT		 2465}
2466
73a25462 2467static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
1da177e4 2468{
73a25462
HR		 2469 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2470 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2471 struct ahd_tmode_tstate *tstate;
2472 struct ahd_initiator_tinfo *tinfo
2473 = ahd_fetch_transinfo(ahd,
2474 starget->channel + 'A',
2475 shost->this_id, starget->id, &tstate);
2476 struct ahd_devinfo devinfo;
2477 unsigned int ppr_options = 0;
2478 unsigned int period = 0;
a4b53a11 2479 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2480 unsigned long flags;
2481
a4b53a11
HR		 2482#ifdef AHD_DEBUG
2483 if ((ahd_debug & AHD_SHOW_DV) != 0)
48813cf9 2484 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
a4b53a11
HR		 2485#endif
2486
73a25462
HR		 2487 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2488 starget->channel + 'A', ROLE_INITIATOR);
2489 if (offset != 0) {
2490 period = tinfo->goal.period;
2491 ppr_options = tinfo->goal.ppr_options;
a4b53a11
HR		 2492 ahd_find_syncrate(ahd, &period, &ppr_options,
2493 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
1da177e4 2494 }
a4b53a11 2495
73a25462
HR		 2496 ahd_lock(ahd, &flags);
2497 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2498 AHD_TRANS_GOAL, FALSE);
2499 ahd_unlock(ahd, &flags);
1da177e4
LT		 2500}
2501
73a25462 2502static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
1da177e4 2503{
73a25462
HR		 2504 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2505 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2506 struct ahd_tmode_tstate *tstate;
2507 struct ahd_initiator_tinfo *tinfo
2508 = ahd_fetch_transinfo(ahd,
2509 starget->channel + 'A',
2510 shost->this_id, starget->id, &tstate);
2511 struct ahd_devinfo devinfo;
2512 unsigned int ppr_options = tinfo->goal.ppr_options
2513 & ~MSG_EXT_PPR_DT_REQ;
2514 unsigned int period = tinfo->goal.period;
52b5cfb3 2515 unsigned int width = tinfo->goal.width;
73a25462
HR		 2516 unsigned long flags;
2517
a4b53a11
HR		 2518#ifdef AHD_DEBUG
2519 if ((ahd_debug & AHD_SHOW_DV) != 0)
48813cf9 2520 printk("%s: %s DT\n", ahd_name(ahd),
a4b53a11
HR		 2521 dt ? "enabling" : "disabling");
2522#endif
0f82cb92 2523 if (dt && spi_max_width(starget)) {
73a25462 2524 ppr_options |= MSG_EXT_PPR_DT_REQ;
52b5cfb3
HR		 2525 if (!width)
2526 ahd_linux_set_width(starget, 1);
a4b53a11
HR		 2527 } else {
2528 if (period <= 9)
2529 period = 10; /* If resetting DT, period must be >= 25ns */
2530 /* IU is invalid without DT set */
2531 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2532 }
73a25462
HR		 2533 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2534 starget->channel + 'A', ROLE_INITIATOR);
2535 ahd_find_syncrate(ahd, &period, &ppr_options,
2536 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2537
73a25462
HR		 2538 ahd_lock(ahd, &flags);
2539 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2540 ppr_options, AHD_TRANS_GOAL, FALSE);
2541 ahd_unlock(ahd, &flags);
1da177e4
LT		 2542}
2543
73a25462 2544static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
1da177e4 2545{
73a25462
HR		 2546 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2547 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2548 struct ahd_tmode_tstate *tstate;
2549 struct ahd_initiator_tinfo *tinfo
2550 = ahd_fetch_transinfo(ahd,
2551 starget->channel + 'A',
2552 shost->this_id, starget->id, &tstate);
2553 struct ahd_devinfo devinfo;
2554 unsigned int ppr_options = tinfo->goal.ppr_options
2555 & ~MSG_EXT_PPR_QAS_REQ;
2556 unsigned int period = tinfo->goal.period;
a4b53a11 2557 unsigned int dt;
73a25462
HR		 2558 unsigned long flags;
2559
a4b53a11
HR		 2560#ifdef AHD_DEBUG
2561 if ((ahd_debug & AHD_SHOW_DV) != 0)
48813cf9 2562 printk("%s: %s QAS\n", ahd_name(ahd),
a4b53a11
HR		 2563 qas ? "enabling" : "disabling");
2564#endif
2565
2566 if (qas) {
2567 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2568 }
2569
2570 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2571
2572 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2573 starget->channel + 'A', ROLE_INITIATOR);
2574 ahd_find_syncrate(ahd, &period, &ppr_options,
2575 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2576
73a25462
HR		 2577 ahd_lock(ahd, &flags);
2578 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2579 ppr_options, AHD_TRANS_GOAL, FALSE);
2580 ahd_unlock(ahd, &flags);
1da177e4
LT		 2581}
2582
73a25462 2583static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
1da177e4 2584{
73a25462
HR		 2585 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2586 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2587 struct ahd_tmode_tstate *tstate;
2588 struct ahd_initiator_tinfo *tinfo
2589 = ahd_fetch_transinfo(ahd,
2590 starget->channel + 'A',
2591 shost->this_id, starget->id, &tstate);
2592 struct ahd_devinfo devinfo;
2593 unsigned int ppr_options = tinfo->goal.ppr_options
2594 & ~MSG_EXT_PPR_IU_REQ;
2595 unsigned int period = tinfo->goal.period;
a4b53a11 2596 unsigned int dt;
73a25462
HR		 2597 unsigned long flags;
2598
a4b53a11
HR		 2599#ifdef AHD_DEBUG
2600 if ((ahd_debug & AHD_SHOW_DV) != 0)
48813cf9 2601 printk("%s: %s IU\n", ahd_name(ahd),
a4b53a11
HR		 2602 iu ? "enabling" : "disabling");
2603#endif
2604
0f82cb92 2605 if (iu && spi_max_width(starget)) {
73a25462 2606 ppr_options |= MSG_EXT_PPR_IU_REQ;
a4b53a11
HR		 2607 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2608 }
2609
2610 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
73a25462
HR		 2611
2612 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2613 starget->channel + 'A', ROLE_INITIATOR);
2614 ahd_find_syncrate(ahd, &period, &ppr_options,
2615 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2616
73a25462
HR		 2617 ahd_lock(ahd, &flags);
2618 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2619 ppr_options, AHD_TRANS_GOAL, FALSE);
2620 ahd_unlock(ahd, &flags);
2621}
1da177e4 2622
73a25462
HR		 2623static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2624{
2625 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2626 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2627 struct ahd_tmode_tstate *tstate;
2628 struct ahd_initiator_tinfo *tinfo
2629 = ahd_fetch_transinfo(ahd,
2630 starget->channel + 'A',
2631 shost->this_id, starget->id, &tstate);
2632 struct ahd_devinfo devinfo;
2633 unsigned int ppr_options = tinfo->goal.ppr_options
2634 & ~MSG_EXT_PPR_RD_STRM;
2635 unsigned int period = tinfo->goal.period;
2636 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2637 unsigned long flags;
2638
a4b53a11
HR		 2639#ifdef AHD_DEBUG
2640 if ((ahd_debug & AHD_SHOW_DV) != 0)
48813cf9 2641 printk("%s: %s Read Streaming\n", ahd_name(ahd),
a4b53a11
HR		 2642 rdstrm ? "enabling" : "disabling");
2643#endif
2644
0f82cb92 2645 if (rdstrm && spi_max_width(starget))
73a25462
HR		 2646 ppr_options |= MSG_EXT_PPR_RD_STRM;
2647
2648 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2649 starget->channel + 'A', ROLE_INITIATOR);
2650 ahd_find_syncrate(ahd, &period, &ppr_options,
2651 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
a4b53a11 2652
a4b53a11
HR		 2653 ahd_lock(ahd, &flags);
2654 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2655 ppr_options, AHD_TRANS_GOAL, FALSE);
2656 ahd_unlock(ahd, &flags);
2657}
2658
2659static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2660{
2661 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2662 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2663 struct ahd_tmode_tstate *tstate;
2664 struct ahd_initiator_tinfo *tinfo
2665 = ahd_fetch_transinfo(ahd,
2666 starget->channel + 'A',
2667 shost->this_id, starget->id, &tstate);
2668 struct ahd_devinfo devinfo;
2669 unsigned int ppr_options = tinfo->goal.ppr_options
2670 & ~MSG_EXT_PPR_WR_FLOW;
2671 unsigned int period = tinfo->goal.period;
2672 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2673 unsigned long flags;
2674
2675#ifdef AHD_DEBUG
2676 if ((ahd_debug & AHD_SHOW_DV) != 0)
48813cf9 2677 printk("%s: %s Write Flow Control\n", ahd_name(ahd),
a4b53a11
HR		 2678 wrflow ? "enabling" : "disabling");
2679#endif
2680
0f82cb92 2681 if (wrflow && spi_max_width(starget))
a4b53a11
HR		 2682 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2683
2684 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2685 starget->channel + 'A', ROLE_INITIATOR);
2686 ahd_find_syncrate(ahd, &period, &ppr_options,
2687 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2688
a4b53a11
HR		 2689 ahd_lock(ahd, &flags);
2690 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2691 ppr_options, AHD_TRANS_GOAL, FALSE);
2692 ahd_unlock(ahd, &flags);
2693}
2694
2695static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2696{
2697 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2698 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2699 struct ahd_tmode_tstate *tstate;
2700 struct ahd_initiator_tinfo *tinfo
2701 = ahd_fetch_transinfo(ahd,
2702 starget->channel + 'A',
2703 shost->this_id, starget->id, &tstate);
2704 struct ahd_devinfo devinfo;
2705 unsigned int ppr_options = tinfo->goal.ppr_options
2706 & ~MSG_EXT_PPR_RTI;
2707 unsigned int period = tinfo->goal.period;
2708 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2709 unsigned long flags;
2710
2711 if ((ahd->features & AHD_RTI) == 0) {
2712#ifdef AHD_DEBUG
2713 if ((ahd_debug & AHD_SHOW_DV) != 0)
48813cf9 2714 printk("%s: RTI not available\n", ahd_name(ahd));
a4b53a11
HR		 2715#endif
2716 return;
2717 }
2718
2719#ifdef AHD_DEBUG
2720 if ((ahd_debug & AHD_SHOW_DV) != 0)
48813cf9 2721 printk("%s: %s RTI\n", ahd_name(ahd),
a4b53a11
HR		 2722 rti ? "enabling" : "disabling");
2723#endif
2724
0f82cb92 2725 if (rti && spi_max_width(starget))
a4b53a11
HR		 2726 ppr_options |= MSG_EXT_PPR_RTI;
2727
2728 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2729 starget->channel + 'A', ROLE_INITIATOR);
2730 ahd_find_syncrate(ahd, &period, &ppr_options,
2731 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2732
a4b53a11
HR		 2733 ahd_lock(ahd, &flags);
2734 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2735 ppr_options, AHD_TRANS_GOAL, FALSE);
2736 ahd_unlock(ahd, &flags);
2737}
2738
2739static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2740{
2741 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2742 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2743 struct ahd_tmode_tstate *tstate;
2744 struct ahd_initiator_tinfo *tinfo
2745 = ahd_fetch_transinfo(ahd,
2746 starget->channel + 'A',
2747 shost->this_id, starget->id, &tstate);
2748 struct ahd_devinfo devinfo;
2749 unsigned int ppr_options = tinfo->goal.ppr_options
2750 & ~MSG_EXT_PPR_PCOMP_EN;
2751 unsigned int period = tinfo->goal.period;
2752 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2753 unsigned long flags;
2754
2755#ifdef AHD_DEBUG
2756 if ((ahd_debug & AHD_SHOW_DV) != 0)
48813cf9 2757 printk("%s: %s Precompensation\n", ahd_name(ahd),
a4b53a11
HR		 2758 pcomp ? "Enable" : "Disable");
2759#endif
2760
0f82cb92 2761 if (pcomp && spi_max_width(starget)) {
843822ad
HR		 2762 uint8_t precomp;
2763
2764 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
980b306a 2765 const struct ahd_linux_iocell_opts *iocell_opts;
843822ad
HR		 2766
2767 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2768 precomp = iocell_opts->precomp;
2769 } else {
2770 precomp = AIC79XX_DEFAULT_PRECOMP;
2771 }
a4b53a11 2772 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
843822ad
HR		 2773 AHD_SET_PRECOMP(ahd, precomp);
2774 } else {
2775 AHD_SET_PRECOMP(ahd, 0);
2776 }
a4b53a11
HR		 2777
2778 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2779 starget->channel + 'A', ROLE_INITIATOR);
2780 ahd_find_syncrate(ahd, &period, &ppr_options,
2781 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2782
73a25462
HR		 2783 ahd_lock(ahd, &flags);
2784 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2785 ppr_options, AHD_TRANS_GOAL, FALSE);
2786 ahd_unlock(ahd, &flags);
1da177e4
LT		 2787}
2788
88ff29a4
JB		 2789static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2790{
2791 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2792 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2793 struct ahd_tmode_tstate *tstate;
2794 struct ahd_initiator_tinfo *tinfo
2795 = ahd_fetch_transinfo(ahd,
2796 starget->channel + 'A',
2797 shost->this_id, starget->id, &tstate);
2798 struct ahd_devinfo devinfo;
2799 unsigned int ppr_options = tinfo->goal.ppr_options
2800 & ~MSG_EXT_PPR_HOLD_MCS;
2801 unsigned int period = tinfo->goal.period;
2802 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2803 unsigned long flags;
2804
0f82cb92 2805 if (hold && spi_max_width(starget))
88ff29a4
JB		 2806 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2807
2808 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2809 starget->channel + 'A', ROLE_INITIATOR);
2810 ahd_find_syncrate(ahd, &period, &ppr_options,
2811 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2812
2813 ahd_lock(ahd, &flags);
2814 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2815 ppr_options, AHD_TRANS_GOAL, FALSE);
2816 ahd_unlock(ahd, &flags);
2817}
2818
d6b9ccbb
HR		 2819static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2820{
2821 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2822 unsigned long flags;
2823 u8 mode;
88ff29a4 2824
d6b9ccbb
HR		 2825 ahd_lock(ahd, &flags);
2826 ahd_pause(ahd);
2827 mode = ahd_inb(ahd, SBLKCTL);
2828 ahd_unpause(ahd);
2829 ahd_unlock(ahd, &flags);
2830
2831 if (mode & ENAB40)
2832 spi_signalling(shost) = SPI_SIGNAL_LVD;
2833 else if (mode & ENAB20)
2834 spi_signalling(shost) = SPI_SIGNAL_SE;
2835 else
2836 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2837}
88ff29a4 2838
73a25462
HR		 2839static struct spi_function_template ahd_linux_transport_functions = {
2840 .set_offset = ahd_linux_set_offset,
2841 .show_offset = 1,
2842 .set_period = ahd_linux_set_period,
2843 .show_period = 1,
2844 .set_width = ahd_linux_set_width,
2845 .show_width = 1,
2846 .set_dt = ahd_linux_set_dt,
2847 .show_dt = 1,
2848 .set_iu = ahd_linux_set_iu,
2849 .show_iu = 1,
2850 .set_qas = ahd_linux_set_qas,
2851 .show_qas = 1,
2852 .set_rd_strm = ahd_linux_set_rd_strm,
2853 .show_rd_strm = 1,
a4b53a11
HR		 2854 .set_wr_flow = ahd_linux_set_wr_flow,
2855 .show_wr_flow = 1,
2856 .set_rti = ahd_linux_set_rti,
2857 .show_rti = 1,
2858 .set_pcomp_en = ahd_linux_set_pcomp_en,
2859 .show_pcomp_en = 1,
88ff29a4
JB		 2860 .set_hold_mcs = ahd_linux_set_hold_mcs,
2861 .show_hold_mcs = 1,
d6b9ccbb 2862 .get_signalling = ahd_linux_get_signalling,
73a25462
HR		 2863};
2864
1da177e4
LT		 2865static int __init
2866ahd_linux_init(void)
2867{
85a46523
CH		 2868 int error = 0;
2869
2870 /*
2871 * If we've been passed any parameters, process them now.
2872 */
2873 if (aic79xx)
2874 aic79xx_setup(aic79xx);
2875
2876 ahd_linux_transport_template =
2877 spi_attach_transport(&ahd_linux_transport_functions);
73a25462
HR		 2878 if (!ahd_linux_transport_template)
2879 return -ENODEV;
85a46523 2880
73a25462
HR		 2881 scsi_transport_reserve_device(ahd_linux_transport_template,
2882 sizeof(struct ahd_linux_device));
a80b3424 2883
85a46523
CH		 2884 error = ahd_linux_pci_init();
2885 if (error)
2886 spi_release_transport(ahd_linux_transport_template);
2887 return error;
1da177e4
LT		 2888}
2889
2890static void __exit
2891ahd_linux_exit(void)
2892{
1da177e4 2893 ahd_linux_pci_exit();
73a25462 2894 spi_release_transport(ahd_linux_transport_template);
1da177e4
LT		 2895}
2896
2897module_init(ahd_linux_init);
2898module_exit(ahd_linux_exit);
Linux kernel - Deliverables
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