1 /*+M*************************************************************************
2 * Adaptec AIC7xxx device driver for Linux.
3 *
4 * Copyright (c) 1994 John Aycock
5 * The University of Calgary Department of Computer Science.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; see the file COPYING. If not, write to
19 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
20 *
21 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
22 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
23 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
24 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
25 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
26 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
27 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
28 * ANSI SCSI-2 specification (draft 10c), ...
29 *
30 * --------------------------------------------------------------------------
31 *
32 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
33 *
34 * Substantially modified to include support for wide and twin bus
35 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
36 * SCB paging, and other rework of the code.
37 *
38 * Parts of this driver were also based on the FreeBSD driver by
39 * Justin T. Gibbs. His copyright follows:
40 *
41 * --------------------------------------------------------------------------
42 * Copyright (c) 1994-1997 Justin Gibbs.
43 * All rights reserved.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions, and the following disclaimer,
50 * without modification, immediately at the beginning of the file.
51 * 2. Redistributions in binary form must reproduce the above copyright
52 * notice, this list of conditions and the following disclaimer in the
53 * documentation and/or other materials provided with the distribution.
54 * 3. The name of the author may not be used to endorse or promote products
55 * derived from this software without specific prior written permission.
56 *
57 * Where this Software is combined with software released under the terms of
58 * the GNU General Public License ("GPL") and the terms of the GPL would require the
59 * combined work to also be released under the terms of the GPL, the terms
60 * and conditions of this License will apply in addition to those of the
61 * GPL with the exception of any terms or conditions of this License that
62 * conflict with, or are expressly prohibited by, the GPL.
63 *
64 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
65 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
66 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
67 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
68 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
69 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
70 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
71 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
72 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
73 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
74 * SUCH DAMAGE.
75 *
76 * $Id: aic7xxx.c,v 1.119 1997/06/27 19:39:18 gibbs Exp $
77 *---------------------------------------------------------------------------
78 *
79 * Thanks also go to (in alphabetical order) the following:
80 *
81 * Rory Bolt - Sequencer bug fixes
82 * Jay Estabrook - Initial DEC Alpha support
83 * Doug Ledford - Much needed abort/reset bug fixes
84 * Kai Makisara - DMAing of SCBs
85 *
86 * A Boot time option was also added for not resetting the scsi bus.
87 *
88 * Form: aic7xxx=extended
89 * aic7xxx=no_reset
90 * aic7xxx=ultra
91 * aic7xxx=irq_trigger:[0,1] # 0 edge, 1 level
92 * aic7xxx=verbose
93 *
94 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
95 *
96 * $Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp $
97 *-M*************************************************************************/
98
99 /*+M**************************************************************************
100 *
101 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
102 *
103 * Copyright (c) 1997-1999 Doug Ledford
104 *
105 * These changes are released under the same licensing terms as the FreeBSD
106 * driver written by Justin Gibbs. Please see his Copyright notice above
107 * for the exact terms and conditions covering my changes as well as the
108 * warranty statement.
109 *
110 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
111 * but are not limited to:
112 *
113 * 1: Import of the latest FreeBSD sequencer code for this driver
114 * 2: Modification of kernel code to accommodate different sequencer semantics
115 * 3: Extensive changes throughout kernel portion of driver to improve
116 * abort/reset processing and error hanndling
117 * 4: Other work contributed by various people on the Internet
118 * 5: Changes to printk information and verbosity selection code
119 * 6: General reliability related changes, especially in IRQ management
120 * 7: Modifications to the default probe/attach order for supported cards
121 * 8: SMP friendliness has been improved
122 *
123 * Overall, this driver represents a significant departure from the official
124 * aic7xxx driver released by Dan Eischen in two ways. First, in the code
125 * itself. A diff between the two version of the driver is now a several
126 * thousand line diff. Second, in approach to solving the same problem. The
127 * problem is importing the FreeBSD aic7xxx driver code to linux can be a
128 * difficult and time consuming process, that also can be error prone. Dan
129 * Eischen's official driver uses the approach that the linux and FreeBSD
130 * drivers should be as identical as possible. To that end, his next version
131 * of this driver will be using a mid-layer code library that he is developing
132 * to moderate communications between the linux mid-level SCSI code and the
133 * low level FreeBSD driver. He intends to be able to essentially drop the
134 * FreeBSD driver into the linux kernel with only a few minor tweaks to some
135 * include files and the like and get things working, making for fast easy
136 * imports of the FreeBSD code into linux.
137 *
138 * I disagree with Dan's approach. Not that I don't think his way of doing
139 * things would be nice, easy to maintain, and create a more uniform driver
140 * between FreeBSD and Linux. I have no objection to those issues. My
141 * disagreement is on the needed functionality. There simply are certain
142 * things that are done differently in FreeBSD than linux that will cause
143 * problems for this driver regardless of any middle ware Dan implements.
144 * The biggest example of this at the moment is interrupt semantics. Linux
145 * doesn't provide the same protection techniques as FreeBSD does, nor can
146 * they be easily implemented in any middle ware code since they would truly
147 * belong in the kernel proper and would effect all drivers. For the time
148 * being, I see issues such as these as major stumbling blocks to the
149 * reliability of code based upon such middle ware. Therefore, I choose to
150 * use a different approach to importing the FreeBSD code that doesn't
151 * involve any middle ware type code. My approach is to import the sequencer
152 * code from FreeBSD wholesale. Then, to only make changes in the kernel
153 * portion of the driver as they are needed for the new sequencer semantics.
154 * In this way, the portion of the driver that speaks to the rest of the
155 * linux kernel is fairly static and can be changed/modified to solve
156 * any problems one might encounter without concern for the FreeBSD driver.
157 *
158 * Note: If time and experience should prove me wrong that the middle ware
159 * code Dan writes is reliable in its operation, then I'll retract my above
160 * statements. But, for those that don't know, I'm from Missouri (in the US)
161 * and our state motto is "The Show-Me State". Well, before I will put
162 * faith into it, you'll have to show me that it works :)
163 *
164 *_M*************************************************************************/
165
166 /*
167 * The next three defines are user configurable. These should be the only
168 * defines a user might need to get in here and change. There are other
169 * defines buried deeper in the code, but those really shouldn't need touched
170 * under normal conditions.
171 */
172
173 /*
174 * AIC7XXX_STRICT_PCI_SETUP
175 * Should we assume the PCI config options on our controllers are set with
176 * sane and proper values, or should we be anal about our PCI config
177 * registers and force them to what we want? The main advantage to
178 * defining this option is on non-Intel hardware where the BIOS may not
179 * have been run to set things up, or if you have one of the BIOSless
180 * Adaptec controllers, such as a 2910, that don't get set up by the
181 * BIOS. However, keep in mind that we really do set the most important
182 * items in the driver regardless of this setting, this only controls some
183 * of the more esoteric PCI options on these cards. In that sense, I
184 * would default to leaving this off. However, if people wish to try
185 * things both ways, that would also help me to know if there are some
186 * machines where it works one way but not another.
187 *
188 * -- July 7, 17:09
189 * OK...I need this on my machine for testing, so the default is to
190 * leave it defined.
191 *
192 * -- July 7, 18:49
193 * I needed it for testing, but it didn't make any difference, so back
194 * off she goes.
195 *
196 * -- July 16, 23:04
197 * I turned it back on to try and compensate for the 2.1.x PCI code
198 * which no longer relies solely on the BIOS and now tries to set
199 * things itself.
200 */
201
202 #define AIC7XXX_STRICT_PCI_SETUP
203
204 /*
205 * AIC7XXX_VERBOSE_DEBUGGING
206 * This option enables a lot of extra printk();s in the code, surrounded
207 * by if (aic7xxx_verbose ...) statements. Executing all of those if
208 * statements and the extra checks can get to where it actually does have
209 * an impact on CPU usage and such, as well as code size. Disabling this
210 * define will keep some of those from becoming part of the code.
211 *
212 * NOTE: Currently, this option has no real effect, I will be adding the
213 * various #ifdef's in the code later when I've decided a section is
214 * complete and no longer needs debugging. OK...a lot of things are now
215 * surrounded by this define, so turning this off does have an impact.
216 */
217
218 /*
219 * #define AIC7XXX_VERBOSE_DEBUGGING
220 */
221
222 #include <linux/module.h>
223 #include <stdarg.h>
224 #include <asm/io.h>
225 #include <asm/irq.h>
226 #include <asm/byteorder.h>
227 #include <linux/string.h>
228 #include <linux/errno.h>
229 #include <linux/kernel.h>
230 #include <linux/ioport.h>
231 #include <linux/delay.h>
232 #include <linux/pci.h>
233 #include <linux/proc_fs.h>
234 #include <linux/blkdev.h>
235 #include <linux/init.h>
236 #include <linux/spinlock.h>
237 #include <linux/smp.h>
238 #include <linux/interrupt.h>
239 #include "scsi.h"
240 #include <scsi/scsi_host.h>
241 #include "aic7xxx_old/aic7xxx.h"
242
243 #include "aic7xxx_old/sequencer.h"
244 #include "aic7xxx_old/scsi_message.h"
245 #include "aic7xxx_old/aic7xxx_reg.h"
246 #include <scsi/scsicam.h>
247
248 #include <linux/stat.h>
249 #include <linux/slab.h> /* for kmalloc() */
250
251 #define AIC7XXX_C_VERSION "5.2.6"
252
253 #define ALL_TARGETS -1
254 #define ALL_CHANNELS -1
255 #define ALL_LUNS -1
256 #define MAX_TARGETS 16
257 #define MAX_LUNS 8
258 #ifndef TRUE
259 # define TRUE 1
260 #endif
261 #ifndef FALSE
262 # define FALSE 0
263 #endif
264
265 #if defined(__powerpc__) || defined(__i386__) || defined(__x86_64__)
266 # define MMAPIO
267 #endif
268
269 /*
270 * You can try raising me for better performance or lowering me if you have
271 * flaky devices that go off the scsi bus when hit with too many tagged
272 * commands (like some IBM SCSI-3 LVD drives).
273 */
274 #define AIC7XXX_CMDS_PER_DEVICE 32
275
276 typedef struct
277 {
278 unsigned char tag_commands[16]; /* Allow for wide/twin adapters. */
279 } adapter_tag_info_t;
280
281 /*
282 * Make a define that will tell the driver not to the default tag depth
283 * everywhere.
284 */
285 #define DEFAULT_TAG_COMMANDS {0, 0, 0, 0, 0, 0, 0, 0,\
286 0, 0, 0, 0, 0, 0, 0, 0}
287
288 /*
289 * Modify this as you see fit for your system. By setting tag_commands
290 * to 0, the driver will use it's own algorithm for determining the
291 * number of commands to use (see above). When 255, the driver will
292 * not enable tagged queueing for that particular device. When positive
293 * (> 0) and (< 255) the values in the array are used for the queue_depth.
294 * Note that the maximum value for an entry is 254, but you're insane if
295 * you try to use that many commands on one device.
296 *
297 * In this example, the first line will disable tagged queueing for all
298 * the devices on the first probed aic7xxx adapter.
299 *
300 * The second line enables tagged queueing with 4 commands/LUN for IDs
301 * (1, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
302 * driver to use its own algorithm for ID 1.
303 *
304 * The third line is the same as the first line.
305 *
306 * The fourth line disables tagged queueing for devices 0 and 3. It
307 * enables tagged queueing for the other IDs, with 16 commands/LUN
308 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
309 * IDs 2, 5-7, and 9-15.
310 */
311
312 /*
313 * NOTE: The below structure is for reference only, the actual structure
314 * to modify in order to change things is found after this fake one.
315 *
316 adapter_tag_info_t aic7xxx_tag_info[] =
317 {
318 {DEFAULT_TAG_COMMANDS},
319 {{4, 0, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 255, 4, 4, 4}},
320 {DEFAULT_TAG_COMMANDS},
321 {{255, 16, 4, 255, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
322 };
323 */
324
325 static adapter_tag_info_t aic7xxx_tag_info[] =
326 {
327 {DEFAULT_TAG_COMMANDS},
328 {DEFAULT_TAG_COMMANDS},
329 {DEFAULT_TAG_COMMANDS},
330 {DEFAULT_TAG_COMMANDS},
331 {DEFAULT_TAG_COMMANDS},
332 {DEFAULT_TAG_COMMANDS},
333 {DEFAULT_TAG_COMMANDS},
334 {DEFAULT_TAG_COMMANDS},
335 {DEFAULT_TAG_COMMANDS},
336 {DEFAULT_TAG_COMMANDS},
337 {DEFAULT_TAG_COMMANDS},
338 {DEFAULT_TAG_COMMANDS},
339 {DEFAULT_TAG_COMMANDS},
340 {DEFAULT_TAG_COMMANDS},
341 {DEFAULT_TAG_COMMANDS},
342 {DEFAULT_TAG_COMMANDS}
343 };
344
345
346 /*
347 * Define an array of board names that can be indexed by aha_type.
348 * Don't forget to change this when changing the types!
349 */
350 static const char *board_names[] = {
351 "AIC-7xxx Unknown", /* AIC_NONE */
352 "Adaptec AIC-7810 Hardware RAID Controller", /* AIC_7810 */
353 "Adaptec AIC-7770 SCSI host adapter", /* AIC_7770 */
354 "Adaptec AHA-274X SCSI host adapter", /* AIC_7771 */
355 "Adaptec AHA-284X SCSI host adapter", /* AIC_284x */
356 "Adaptec AIC-7850 SCSI host adapter", /* AIC_7850 */
357 "Adaptec AIC-7855 SCSI host adapter", /* AIC_7855 */
358 "Adaptec AIC-7860 Ultra SCSI host adapter", /* AIC_7860 */
359 "Adaptec AHA-2940A Ultra SCSI host adapter", /* AIC_7861 */
360 "Adaptec AIC-7870 SCSI host adapter", /* AIC_7870 */
361 "Adaptec AHA-294X SCSI host adapter", /* AIC_7871 */
362 "Adaptec AHA-394X SCSI host adapter", /* AIC_7872 */
363 "Adaptec AHA-398X SCSI host adapter", /* AIC_7873 */
364 "Adaptec AHA-2944 SCSI host adapter", /* AIC_7874 */
365 "Adaptec AIC-7880 Ultra SCSI host adapter", /* AIC_7880 */
366 "Adaptec AHA-294X Ultra SCSI host adapter", /* AIC_7881 */
367 "Adaptec AHA-394X Ultra SCSI host adapter", /* AIC_7882 */
368 "Adaptec AHA-398X Ultra SCSI host adapter", /* AIC_7883 */
369 "Adaptec AHA-2944 Ultra SCSI host adapter", /* AIC_7884 */
370 "Adaptec AHA-2940UW Pro Ultra SCSI host adapter", /* AIC_7887 */
371 "Adaptec AIC-7895 Ultra SCSI host adapter", /* AIC_7895 */
372 "Adaptec AIC-7890/1 Ultra2 SCSI host adapter", /* AIC_7890 */
373 "Adaptec AHA-293X Ultra2 SCSI host adapter", /* AIC_7890 */
374 "Adaptec AHA-294X Ultra2 SCSI host adapter", /* AIC_7890 */
375 "Adaptec AIC-7896/7 Ultra2 SCSI host adapter", /* AIC_7896 */
376 "Adaptec AHA-394X Ultra2 SCSI host adapter", /* AIC_7897 */
377 "Adaptec AHA-395X Ultra2 SCSI host adapter", /* AIC_7897 */
378 "Adaptec PCMCIA SCSI controller", /* card bus stuff */
379 "Adaptec AIC-7892 Ultra 160/m SCSI host adapter", /* AIC_7892 */
380 "Adaptec AIC-7899 Ultra 160/m SCSI host adapter", /* AIC_7899 */
381 };
382
383 /*
384 * There should be a specific return value for this in scsi.h, but
385 * it seems that most drivers ignore it.
386 */
387 #define DID_UNDERFLOW DID_ERROR
388
389 /*
390 * What we want to do is have the higher level scsi driver requeue
391 * the command to us. There is no specific driver status for this
392 * condition, but the higher level scsi driver will requeue the
393 * command on a DID_BUS_BUSY error.
394 *
395 * Upon further inspection and testing, it seems that DID_BUS_BUSY
396 * will *always* retry the command. We can get into an infinite loop
397 * if this happens when we really want some sort of counter that
398 * will automatically abort/reset the command after so many retries.
399 * Using DID_ERROR will do just that. (Made by a suggestion by
400 * Doug Ledford 8/1/96)
401 */
402 #define DID_RETRY_COMMAND DID_ERROR
403
404 #define HSCSIID 0x07
405 #define SCSI_RESET 0x040
406
407 /*
408 * EISA/VL-bus stuff
409 */
410 #define MINSLOT 1
411 #define MAXSLOT 15
412 #define SLOTBASE(x) ((x) << 12)
413 #define BASE_TO_SLOT(x) ((x) >> 12)
414
415 /*
416 * Standard EISA Host ID regs (Offset from slot base)
417 */
418 #define AHC_HID0 0x80 /* 0,1: msb of ID2, 2-7: ID1 */
419 #define AHC_HID1 0x81 /* 0-4: ID3, 5-7: LSB ID2 */
420 #define AHC_HID2 0x82 /* product */
421 #define AHC_HID3 0x83 /* firmware revision */
422
423 /*
424 * AIC-7770 I/O range to reserve for a card
425 */
426 #define MINREG 0xC00
427 #define MAXREG 0xCFF
428
429 #define INTDEF 0x5C /* Interrupt Definition Register */
430
431 /*
432 * AIC-78X0 PCI registers
433 */
434 #define CLASS_PROGIF_REVID 0x08
435 #define DEVREVID 0x000000FFul
436 #define PROGINFC 0x0000FF00ul
437 #define SUBCLASS 0x00FF0000ul
438 #define BASECLASS 0xFF000000ul
439
440 #define CSIZE_LATTIME 0x0C
441 #define CACHESIZE 0x0000003Ful /* only 5 bits */
442 #define LATTIME 0x0000FF00ul
443
444 #define DEVCONFIG 0x40
445 #define SCBSIZE32 0x00010000ul /* aic789X only */
446 #define MPORTMODE 0x00000400ul /* aic7870 only */
447 #define RAMPSM 0x00000200ul /* aic7870 only */
448 #define RAMPSM_ULTRA2 0x00000004
449 #define VOLSENSE 0x00000100ul
450 #define SCBRAMSEL 0x00000080ul
451 #define SCBRAMSEL_ULTRA2 0x00000008
452 #define MRDCEN 0x00000040ul
453 #define EXTSCBTIME 0x00000020ul /* aic7870 only */
454 #define EXTSCBPEN 0x00000010ul /* aic7870 only */
455 #define BERREN 0x00000008ul
456 #define DACEN 0x00000004ul
457 #define STPWLEVEL 0x00000002ul
458 #define DIFACTNEGEN 0x00000001ul /* aic7870 only */
459
460 #define SCAMCTL 0x1a /* Ultra2 only */
461 #define CCSCBBADDR 0xf0 /* aic7895/6/7 */
462
463 /*
464 * Define the different types of SEEPROMs on aic7xxx adapters
465 * and make it also represent the address size used in accessing
466 * its registers. The 93C46 chips have 1024 bits organized into
467 * 64 16-bit words, while the 93C56 chips have 2048 bits organized
468 * into 128 16-bit words. The C46 chips use 6 bits to address
469 * each word, while the C56 and C66 (4096 bits) use 8 bits to
470 * address each word.
471 */
472 typedef enum {C46 = 6, C56_66 = 8} seeprom_chip_type;
473
474 /*
475 *
476 * Define the format of the SEEPROM registers (16 bits).
477 *
478 */
479 struct seeprom_config {
480
481 /*
482 * SCSI ID Configuration Flags
483 */
484 #define CFXFER 0x0007 /* synchronous transfer rate */
485 #define CFSYNCH 0x0008 /* enable synchronous transfer */
486 #define CFDISC 0x0010 /* enable disconnection */
487 #define CFWIDEB 0x0020 /* wide bus device (wide card) */
488 #define CFSYNCHISULTRA 0x0040 /* CFSYNC is an ultra offset */
489 #define CFNEWULTRAFORMAT 0x0080 /* Use the Ultra2 SEEPROM format */
490 #define CFSTART 0x0100 /* send start unit SCSI command */
491 #define CFINCBIOS 0x0200 /* include in BIOS scan */
492 #define CFRNFOUND 0x0400 /* report even if not found */
493 #define CFMULTILUN 0x0800 /* probe mult luns in BIOS scan */
494 #define CFWBCACHEYES 0x4000 /* Enable W-Behind Cache on drive */
495 #define CFWBCACHENC 0xc000 /* Don't change W-Behind Cache */
496 /* UNUSED 0x3000 */
497 unsigned short device_flags[16]; /* words 0-15 */
498
499 /*
500 * BIOS Control Bits
501 */
502 #define CFSUPREM 0x0001 /* support all removable drives */
503 #define CFSUPREMB 0x0002 /* support removable drives for boot only */
504 #define CFBIOSEN 0x0004 /* BIOS enabled */
505 /* UNUSED 0x0008 */
506 #define CFSM2DRV 0x0010 /* support more than two drives */
507 #define CF284XEXTEND 0x0020 /* extended translation (284x cards) */
508 /* UNUSED 0x0040 */
509 #define CFEXTEND 0x0080 /* extended translation enabled */
510 /* UNUSED 0xFF00 */
511 unsigned short bios_control; /* word 16 */
512
513 /*
514 * Host Adapter Control Bits
515 */
516 #define CFAUTOTERM 0x0001 /* Perform Auto termination */
517 #define CFULTRAEN 0x0002 /* Ultra SCSI speed enable (Ultra cards) */
518 #define CF284XSELTO 0x0003 /* Selection timeout (284x cards) */
519 #define CF284XFIFO 0x000C /* FIFO Threshold (284x cards) */
520 #define CFSTERM 0x0004 /* SCSI low byte termination */
521 #define CFWSTERM 0x0008 /* SCSI high byte termination (wide card) */
522 #define CFSPARITY 0x0010 /* SCSI parity */
523 #define CF284XSTERM 0x0020 /* SCSI low byte termination (284x cards) */
524 #define CFRESETB 0x0040 /* reset SCSI bus at boot */
525 #define CFBPRIMARY 0x0100 /* Channel B primary on 7895 chipsets */
526 #define CFSEAUTOTERM 0x0400 /* aic7890 Perform SE Auto Term */
527 #define CFLVDSTERM 0x0800 /* aic7890 LVD Termination */
528 /* UNUSED 0xF280 */
529 unsigned short adapter_control; /* word 17 */
530
531 /*
532 * Bus Release, Host Adapter ID
533 */
534 #define CFSCSIID 0x000F /* host adapter SCSI ID */
535 /* UNUSED 0x00F0 */
536 #define CFBRTIME 0xFF00 /* bus release time */
537 unsigned short brtime_id; /* word 18 */
538
539 /*
540 * Maximum targets
541 */
542 #define CFMAXTARG 0x00FF /* maximum targets */
543 /* UNUSED 0xFF00 */
544 unsigned short max_targets; /* word 19 */
545
546 unsigned short res_1[11]; /* words 20-30 */
547 unsigned short checksum; /* word 31 */
548 };
549
550 #define SELBUS_MASK 0x0a
551 #define SELNARROW 0x00
552 #define SELBUSB 0x08
553 #define SINGLE_BUS 0x00
554
555 #define SCB_TARGET(scb) \
556 (((scb)->hscb->target_channel_lun & TID) >> 4)
557 #define SCB_LUN(scb) \
558 ((scb)->hscb->target_channel_lun & LID)
559 #define SCB_IS_SCSIBUS_B(scb) \
560 (((scb)->hscb->target_channel_lun & SELBUSB) != 0)
561
562 /*
563 * If an error occurs during a data transfer phase, run the command
564 * to completion - it's easier that way - making a note of the error
565 * condition in this location. This then will modify a DID_OK status
566 * into an appropriate error for the higher-level SCSI code.
567 */
568 #define aic7xxx_error(cmd) ((cmd)->SCp.Status)
569
570 /*
571 * Keep track of the targets returned status.
572 */
573 #define aic7xxx_status(cmd) ((cmd)->SCp.sent_command)
574
575 /*
576 * The position of the SCSI commands scb within the scb array.
577 */
578 #define aic7xxx_position(cmd) ((cmd)->SCp.have_data_in)
579
580 /*
581 * The stored DMA mapping for single-buffer data transfers.
582 */
583 #define aic7xxx_mapping(cmd) ((cmd)->SCp.phase)
584
585 /*
586 * Get out private data area from a scsi cmd pointer
587 */
588 #define AIC_DEV(cmd) ((struct aic_dev_data *)(cmd)->device->hostdata)
589
590 /*
591 * So we can keep track of our host structs
592 */
593 static struct aic7xxx_host *first_aic7xxx = NULL;
594
595 /*
596 * As of Linux 2.1, the mid-level SCSI code uses virtual addresses
597 * in the scatter-gather lists. We need to convert the virtual
598 * addresses to physical addresses.
599 */
600 struct hw_scatterlist {
601 unsigned int address;
602 unsigned int length;
603 };
604
605 /*
606 * Maximum number of SG segments these cards can support.
607 */
608 #define AIC7XXX_MAX_SG 128
609
610 /*
611 * The maximum number of SCBs we could have for ANY type
612 * of card. DON'T FORGET TO CHANGE THE SCB MASK IN THE
613 * SEQUENCER CODE IF THIS IS MODIFIED!
614 */
615 #define AIC7XXX_MAXSCB 255
616
617
618 struct aic7xxx_hwscb {
619 /* ------------ Begin hardware supported fields ---------------- */
620 /* 0*/ unsigned char control;
621 /* 1*/ unsigned char target_channel_lun; /* 4/1/3 bits */
622 /* 2*/ unsigned char target_status;
623 /* 3*/ unsigned char SG_segment_count;
624 /* 4*/ unsigned int SG_list_pointer;
625 /* 8*/ unsigned char residual_SG_segment_count;
626 /* 9*/ unsigned char residual_data_count[3];
627 /*12*/ unsigned int data_pointer;
628 /*16*/ unsigned int data_count;
629 /*20*/ unsigned int SCSI_cmd_pointer;
630 /*24*/ unsigned char SCSI_cmd_length;
631 /*25*/ unsigned char tag; /* Index into our kernel SCB array.
632 * Also used as the tag for tagged I/O
633 */
634 #define SCB_PIO_TRANSFER_SIZE 26 /* amount we need to upload/download
635 * via PIO to initialize a transaction.
636 */
637 /*26*/ unsigned char next; /* Used to thread SCBs awaiting selection
638 * or disconnected down in the sequencer.
639 */
640 /*27*/ unsigned char prev;
641 /*28*/ unsigned int pad; /*
642 * Unused by the kernel, but we require
643 * the padding so that the array of
644 * hardware SCBs is aligned on 32 byte
645 * boundaries so the sequencer can index
646 */
647 };
648
649 typedef enum {
650 SCB_FREE = 0x0000,
651 SCB_DTR_SCB = 0x0001,
652 SCB_WAITINGQ = 0x0002,
653 SCB_ACTIVE = 0x0004,
654 SCB_SENSE = 0x0008,
655 SCB_ABORT = 0x0010,
656 SCB_DEVICE_RESET = 0x0020,
657 SCB_RESET = 0x0040,
658 SCB_RECOVERY_SCB = 0x0080,
659 SCB_MSGOUT_PPR = 0x0100,
660 SCB_MSGOUT_SENT = 0x0200,
661 SCB_MSGOUT_SDTR = 0x0400,
662 SCB_MSGOUT_WDTR = 0x0800,
663 SCB_MSGOUT_BITS = SCB_MSGOUT_PPR |
664 SCB_MSGOUT_SENT |
665 SCB_MSGOUT_SDTR |
666 SCB_MSGOUT_WDTR,
667 SCB_QUEUED_ABORT = 0x1000,
668 SCB_QUEUED_FOR_DONE = 0x2000,
669 SCB_WAS_BUSY = 0x4000,
670 SCB_QUEUE_FULL = 0x8000
671 } scb_flag_type;
672
673 typedef enum {
674 AHC_FNONE = 0x00000000,
675 AHC_PAGESCBS = 0x00000001,
676 AHC_CHANNEL_B_PRIMARY = 0x00000002,
677 AHC_USEDEFAULTS = 0x00000004,
678 AHC_INDIRECT_PAGING = 0x00000008,
679 AHC_CHNLB = 0x00000020,
680 AHC_CHNLC = 0x00000040,
681 AHC_EXTEND_TRANS_A = 0x00000100,
682 AHC_EXTEND_TRANS_B = 0x00000200,
683 AHC_TERM_ENB_A = 0x00000400,
684 AHC_TERM_ENB_SE_LOW = 0x00000400,
685 AHC_TERM_ENB_B = 0x00000800,
686 AHC_TERM_ENB_SE_HIGH = 0x00000800,
687 AHC_HANDLING_REQINITS = 0x00001000,
688 AHC_TARGETMODE = 0x00002000,
689 AHC_NEWEEPROM_FMT = 0x00004000,
690 /*
691 * Here ends the FreeBSD defined flags and here begins the linux defined
692 * flags. NOTE: I did not preserve the old flag name during this change
693 * specifically to force me to evaluate what flags were being used properly
694 * and what flags weren't. This way, I could clean up the flag usage on
695 * a use by use basis. Doug Ledford
696 */
697 AHC_MOTHERBOARD = 0x00020000,
698 AHC_NO_STPWEN = 0x00040000,
699 AHC_RESET_DELAY = 0x00080000,
700 AHC_A_SCANNED = 0x00100000,
701 AHC_B_SCANNED = 0x00200000,
702 AHC_MULTI_CHANNEL = 0x00400000,
703 AHC_BIOS_ENABLED = 0x00800000,
704 AHC_SEEPROM_FOUND = 0x01000000,
705 AHC_TERM_ENB_LVD = 0x02000000,
706 AHC_ABORT_PENDING = 0x04000000,
707 AHC_RESET_PENDING = 0x08000000,
708 #define AHC_IN_ISR_BIT 28
709 AHC_IN_ISR = 0x10000000,
710 AHC_IN_ABORT = 0x20000000,
711 AHC_IN_RESET = 0x40000000,
712 AHC_EXTERNAL_SRAM = 0x80000000
713 } ahc_flag_type;
714
715 typedef enum {
716 AHC_NONE = 0x0000,
717 AHC_CHIPID_MASK = 0x00ff,
718 AHC_AIC7770 = 0x0001,
719 AHC_AIC7850 = 0x0002,
720 AHC_AIC7860 = 0x0003,
721 AHC_AIC7870 = 0x0004,
722 AHC_AIC7880 = 0x0005,
723 AHC_AIC7890 = 0x0006,
724 AHC_AIC7895 = 0x0007,
725 AHC_AIC7896 = 0x0008,
726 AHC_AIC7892 = 0x0009,
727 AHC_AIC7899 = 0x000a,
728 AHC_VL = 0x0100,
729 AHC_EISA = 0x0200,
730 AHC_PCI = 0x0400,
731 } ahc_chip;
732
733 typedef enum {
734 AHC_FENONE = 0x0000,
735 AHC_ULTRA = 0x0001,
736 AHC_ULTRA2 = 0x0002,
737 AHC_WIDE = 0x0004,
738 AHC_TWIN = 0x0008,
739 AHC_MORE_SRAM = 0x0010,
740 AHC_CMD_CHAN = 0x0020,
741 AHC_QUEUE_REGS = 0x0040,
742 AHC_SG_PRELOAD = 0x0080,
743 AHC_SPIOCAP = 0x0100,
744 AHC_ULTRA3 = 0x0200,
745 AHC_NEW_AUTOTERM = 0x0400,
746 AHC_AIC7770_FE = AHC_FENONE,
747 AHC_AIC7850_FE = AHC_SPIOCAP,
748 AHC_AIC7860_FE = AHC_ULTRA|AHC_SPIOCAP,
749 AHC_AIC7870_FE = AHC_FENONE,
750 AHC_AIC7880_FE = AHC_ULTRA,
751 AHC_AIC7890_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA2|
752 AHC_QUEUE_REGS|AHC_SG_PRELOAD|AHC_NEW_AUTOTERM,
753 AHC_AIC7895_FE = AHC_MORE_SRAM|AHC_CMD_CHAN|AHC_ULTRA,
754 AHC_AIC7896_FE = AHC_AIC7890_FE,
755 AHC_AIC7892_FE = AHC_AIC7890_FE|AHC_ULTRA3,
756 AHC_AIC7899_FE = AHC_AIC7890_FE|AHC_ULTRA3,
757 } ahc_feature;
758
759 #define SCB_DMA_ADDR(scb, addr) ((unsigned long)(addr) + (scb)->scb_dma->dma_offset)
760
761 struct aic7xxx_scb_dma {
762 unsigned long dma_offset; /* Correction you have to add
763 * to virtual address to get
764 * dma handle in this region */
765 dma_addr_t dma_address; /* DMA handle of the start,
766 * for unmap */
767 unsigned int dma_len; /* DMA length */
768 };
769
770 typedef enum {
771 AHC_BUG_NONE = 0x0000,
772 AHC_BUG_TMODE_WIDEODD = 0x0001,
773 AHC_BUG_AUTOFLUSH = 0x0002,
774 AHC_BUG_CACHETHEN = 0x0004,
775 AHC_BUG_CACHETHEN_DIS = 0x0008,
776 AHC_BUG_PCI_2_1_RETRY = 0x0010,
777 AHC_BUG_PCI_MWI = 0x0020,
778 AHC_BUG_SCBCHAN_UPLOAD = 0x0040,
779 } ahc_bugs;
780
781 struct aic7xxx_scb {
782 struct aic7xxx_hwscb *hscb; /* corresponding hardware scb */
783 struct scsi_cmnd *cmd; /* scsi_cmnd for this scb */
784 struct aic7xxx_scb *q_next; /* next scb in queue */
785 volatile scb_flag_type flags; /* current state of scb */
786 struct hw_scatterlist *sg_list; /* SG list in adapter format */
787 unsigned char tag_action;
788 unsigned char sg_count;
789 unsigned char *sense_cmd; /*
790 * Allocate 6 characters for
791 * sense command.
792 */
793 unsigned char *cmnd;
794 unsigned int sg_length; /*
795 * We init this during
796 * buildscb so we don't have
797 * to calculate anything during
798 * underflow/overflow/stat code
799 */
800 void *kmalloc_ptr;
801 struct aic7xxx_scb_dma *scb_dma;
802 };
803
804 /*
805 * Define a linked list of SCBs.
806 */
807 typedef struct {
808 struct aic7xxx_scb *head;
809 struct aic7xxx_scb *tail;
810 } scb_queue_type;
811
812 static struct {
813 unsigned char errno;
814 const char *errmesg;
815 } hard_error[] = {
816 { ILLHADDR, "Illegal Host Access" },
817 { ILLSADDR, "Illegal Sequencer Address referenced" },
818 { ILLOPCODE, "Illegal Opcode in sequencer program" },
819 { SQPARERR, "Sequencer Ram Parity Error" },
820 { DPARERR, "Data-Path Ram Parity Error" },
821 { MPARERR, "Scratch Ram/SCB Array Ram Parity Error" },
822 { PCIERRSTAT,"PCI Error detected" },
823 { CIOPARERR, "CIOBUS Parity Error" }
824 };
825
826 static unsigned char
827 generic_sense[] = { REQUEST_SENSE, 0, 0, 0, 255, 0 };
828
829 typedef struct {
830 scb_queue_type free_scbs; /*
831 * SCBs assigned to free slot on
832 * card (no paging required)
833 */
834 struct aic7xxx_scb *scb_array[AIC7XXX_MAXSCB];
835 struct aic7xxx_hwscb *hscbs;
836 unsigned char numscbs; /* current number of scbs */
837 unsigned char maxhscbs; /* hardware scbs */
838 unsigned char maxscbs; /* max scbs including pageable scbs */
839 dma_addr_t hscbs_dma; /* DMA handle to hscbs */
840 unsigned int hscbs_dma_len; /* length of the above DMA area */
841 void *hscb_kmalloc_ptr;
842 } scb_data_type;
843
844 struct target_cmd {
845 unsigned char mesg_bytes[4];
846 unsigned char command[28];
847 };
848
849 #define AHC_TRANS_CUR 0x0001
850 #define AHC_TRANS_ACTIVE 0x0002
851 #define AHC_TRANS_GOAL 0x0004
852 #define AHC_TRANS_USER 0x0008
853 #define AHC_TRANS_QUITE 0x0010
854 typedef struct {
855 unsigned char width;
856 unsigned char period;
857 unsigned char offset;
858 unsigned char options;
859 } transinfo_type;
860
861 struct aic_dev_data {
862 volatile scb_queue_type delayed_scbs;
863 volatile unsigned short temp_q_depth;
864 unsigned short max_q_depth;
865 volatile unsigned char active_cmds;
866 /*
867 * Statistics Kept:
868 *
869 * Total Xfers (count for each command that has a data xfer),
870 * broken down by reads && writes.
871 *
872 * Further sorted into a few bins for keeping tabs on how many commands
873 * we get of various sizes.
874 *
875 */
876 long w_total; /* total writes */
877 long r_total; /* total reads */
878 long barrier_total; /* total num of REQ_BARRIER commands */
879 long ordered_total; /* How many REQ_BARRIER commands we
880 used ordered tags to satisfy */
881 long w_bins[6]; /* binned write */
882 long r_bins[6]; /* binned reads */
883 transinfo_type cur;
884 transinfo_type goal;
885 #define BUS_DEVICE_RESET_PENDING 0x01
886 #define DEVICE_RESET_DELAY 0x02
887 #define DEVICE_PRINT_DTR 0x04
888 #define DEVICE_WAS_BUSY 0x08
889 #define DEVICE_DTR_SCANNED 0x10
890 #define DEVICE_SCSI_3 0x20
891 volatile unsigned char flags;
892 unsigned needppr:1;
893 unsigned needppr_copy:1;
894 unsigned needsdtr:1;
895 unsigned needsdtr_copy:1;
896 unsigned needwdtr:1;
897 unsigned needwdtr_copy:1;
898 unsigned dtr_pending:1;
899 struct scsi_device *SDptr;
900 struct list_head list;
901 };
902
903 /*
904 * Define a structure used for each host adapter. Note, in order to avoid
905 * problems with architectures I can't test on (because I don't have one,
906 * such as the Alpha based systems) which happen to give faults for
907 * non-aligned memory accesses, care was taken to align this structure
908 * in a way that gauranteed all accesses larger than 8 bits were aligned
909 * on the appropriate boundary. It's also organized to try and be more
910 * cache line efficient. Be careful when changing this lest you might hurt
911 * overall performance and bring down the wrath of the masses.
912 */
913 struct aic7xxx_host {
914 /*
915 * This is the first 64 bytes in the host struct
916 */
917
918 /*
919 * We are grouping things here....first, items that get either read or
920 * written with nearly every interrupt
921 */
922 volatile long flags;
923 ahc_feature features; /* chip features */
924 unsigned long base; /* card base address */
925 volatile unsigned char __iomem *maddr; /* memory mapped address */
926 unsigned long isr_count; /* Interrupt count */
927 unsigned long spurious_int;
928 scb_data_type *scb_data;
929 struct aic7xxx_cmd_queue {
930 struct scsi_cmnd *head;
931 struct scsi_cmnd *tail;
932 } completeq;
933
934 /*
935 * Things read/written on nearly every entry into aic7xxx_queue()
936 */
937 volatile scb_queue_type waiting_scbs;
938 unsigned char unpause; /* unpause value for HCNTRL */
939 unsigned char pause; /* pause value for HCNTRL */
940 volatile unsigned char qoutfifonext;
941 volatile unsigned char activescbs; /* active scbs */
942 volatile unsigned char max_activescbs;
943 volatile unsigned char qinfifonext;
944 volatile unsigned char *untagged_scbs;
945 volatile unsigned char *qoutfifo;
946 volatile unsigned char *qinfifo;
947
948 unsigned char dev_last_queue_full[MAX_TARGETS];
949 unsigned char dev_last_queue_full_count[MAX_TARGETS];
950 unsigned short ultraenb; /* Gets downloaded to card as a bitmap */
951 unsigned short discenable; /* Gets downloaded to card as a bitmap */
952 transinfo_type user[MAX_TARGETS];
953
954 unsigned char msg_buf[13]; /* The message for the target */
955 unsigned char msg_type;
956 #define MSG_TYPE_NONE 0x00
957 #define MSG_TYPE_INITIATOR_MSGOUT 0x01
958 #define MSG_TYPE_INITIATOR_MSGIN 0x02
959 unsigned char msg_len; /* Length of message */
960 unsigned char msg_index; /* Index into msg_buf array */
961
962
963 /*
964 * We put the less frequently used host structure items
965 * after the more frequently used items to try and ease
966 * the burden on the cache subsystem.
967 * These entries are not *commonly* accessed, whereas
968 * the preceding entries are accessed very often.
969 */
970
971 unsigned int irq; /* IRQ for this adapter */
972 int instance; /* aic7xxx instance number */
973 int scsi_id; /* host adapter SCSI ID */
974 int scsi_id_b; /* channel B for twin adapters */
975 unsigned int bios_address;
976 int board_name_index;
977 unsigned short bios_control; /* bios control - SEEPROM */
978 unsigned short adapter_control; /* adapter control - SEEPROM */
979 struct pci_dev *pdev;
980 unsigned char pci_bus;
981 unsigned char pci_device_fn;
982 struct seeprom_config sc;
983 unsigned short sc_type;
984 unsigned short sc_size;
985 struct aic7xxx_host *next; /* allow for multiple IRQs */
986 struct Scsi_Host *host; /* pointer to scsi host */
987 struct list_head aic_devs; /* all aic_dev structs on host */
988 int host_no; /* SCSI host number */
989 unsigned long mbase; /* I/O memory address */
990 ahc_chip chip; /* chip type */
991 ahc_bugs bugs;
992 dma_addr_t fifo_dma; /* DMA handle for fifo arrays */
993 };
994
995 /*
996 * Valid SCSIRATE values. (p. 3-17)
997 * Provides a mapping of transfer periods in ns/4 to the proper value to
998 * stick in the SCSIRATE reg to use that transfer rate.
999 */
1000 #define AHC_SYNCRATE_ULTRA3 0
1001 #define AHC_SYNCRATE_ULTRA2 1
1002 #define AHC_SYNCRATE_ULTRA 3
1003 #define AHC_SYNCRATE_FAST 6
1004 #define AHC_SYNCRATE_CRC 0x40
1005 #define AHC_SYNCRATE_SE 0x10
1006 static struct aic7xxx_syncrate {
1007 /* Rates in Ultra mode have bit 8 of sxfr set */
1008 #define ULTRA_SXFR 0x100
1009 int sxfr_ultra2;
1010 int sxfr;
1011 unsigned char period;
1012 const char *rate[2];
1013 } aic7xxx_syncrates[] = {
1014 { 0x42, 0x000, 9, {"80.0", "160.0"} },
1015 { 0x13, 0x000, 10, {"40.0", "80.0"} },
1016 { 0x14, 0x000, 11, {"33.0", "66.6"} },
1017 { 0x15, 0x100, 12, {"20.0", "40.0"} },
1018 { 0x16, 0x110, 15, {"16.0", "32.0"} },
1019 { 0x17, 0x120, 18, {"13.4", "26.8"} },
1020 { 0x18, 0x000, 25, {"10.0", "20.0"} },
1021 { 0x19, 0x010, 31, {"8.0", "16.0"} },
1022 { 0x1a, 0x020, 37, {"6.67", "13.3"} },
1023 { 0x1b, 0x030, 43, {"5.7", "11.4"} },
1024 { 0x10, 0x040, 50, {"5.0", "10.0"} },
1025 { 0x00, 0x050, 56, {"4.4", "8.8" } },
1026 { 0x00, 0x060, 62, {"4.0", "8.0" } },
1027 { 0x00, 0x070, 68, {"3.6", "7.2" } },
1028 { 0x00, 0x000, 0, {NULL, NULL} },
1029 };
1030
1031 #define CTL_OF_SCB(scb) (((scb->hscb)->target_channel_lun >> 3) & 0x1), \
1032 (((scb->hscb)->target_channel_lun >> 4) & 0xf), \
1033 ((scb->hscb)->target_channel_lun & 0x07)
1034
1035 #define CTL_OF_CMD(cmd) ((cmd->device->channel) & 0x01), \
1036 ((cmd->device->id) & 0x0f), \
1037 ((cmd->device->lun) & 0x07)
1038
1039 #define TARGET_INDEX(cmd) ((cmd)->device->id | ((cmd)->device->channel << 3))
1040
1041 /*
1042 * A nice little define to make doing our printks a little easier
1043 */
1044
1045 #define WARN_LEAD KERN_WARNING "(scsi%d:%d:%d:%d) "
1046 #define INFO_LEAD KERN_INFO "(scsi%d:%d:%d:%d) "
1047
1048 /*
1049 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
1050 * cards in the system. This should be fixed. Exceptions to this
1051 * rule are noted in the comments.
1052 */
1053
1054 /*
1055 * Use this as the default queue depth when setting tagged queueing on.
1056 */
1057 static unsigned int aic7xxx_default_queue_depth = AIC7XXX_CMDS_PER_DEVICE;
1058
1059 /*
1060 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
1061 * has no effect on any later resets that might occur due to things like
1062 * SCSI bus timeouts.
1063 */
1064 static unsigned int aic7xxx_no_reset = 0;
1065 /*
1066 * Certain PCI motherboards will scan PCI devices from highest to lowest,
1067 * others scan from lowest to highest, and they tend to do all kinds of
1068 * strange things when they come into contact with PCI bridge chips. The
1069 * net result of all this is that the PCI card that is actually used to boot
1070 * the machine is very hard to detect. Most motherboards go from lowest
1071 * PCI slot number to highest, and the first SCSI controller found is the
1072 * one you boot from. The only exceptions to this are when a controller
1073 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
1074 * from lowest PCI slot number to highest PCI slot number. We also force
1075 * all controllers with their BIOS disabled to the end of the list. This
1076 * works on *almost* all computers. Where it doesn't work, we have this
1077 * option. Setting this option to non-0 will reverse the order of the sort
1078 * to highest first, then lowest, but will still leave cards with their BIOS
1079 * disabled at the very end. That should fix everyone up unless there are
1080 * really strange cirumstances.
1081 */
1082 static int aic7xxx_reverse_scan = 0;
1083 /*
1084 * Should we force EXTENDED translation on a controller.
1085 * 0 == Use whatever is in the SEEPROM or default to off
1086 * 1 == Use whatever is in the SEEPROM or default to on
1087 */
1088 static unsigned int aic7xxx_extended = 0;
1089 /*
1090 * The IRQ trigger method used on EISA controllers. Does not effect PCI cards.
1091 * -1 = Use detected settings.
1092 * 0 = Force Edge triggered mode.
1093 * 1 = Force Level triggered mode.
1094 */
1095 static int aic7xxx_irq_trigger = -1;
1096 /*
1097 * This variable is used to override the termination settings on a controller.
1098 * This should not be used under normal conditions. However, in the case
1099 * that a controller does not have a readable SEEPROM (so that we can't
1100 * read the SEEPROM settings directly) and that a controller has a buggered
1101 * version of the cable detection logic, this can be used to force the
1102 * correct termination. It is preferable to use the manual termination
1103 * settings in the BIOS if possible, but some motherboard controllers store
1104 * those settings in a format we can't read. In other cases, auto term
1105 * should also work, but the chipset was put together with no auto term
1106 * logic (common on motherboard controllers). In those cases, we have
1107 * 32 bits here to work with. That's good for 8 controllers/channels. The
1108 * bits are organized as 4 bits per channel, with scsi0 getting the lowest
1109 * 4 bits in the int. A 1 in a bit position indicates the termination setting
1110 * that corresponds to that bit should be enabled, a 0 is disabled.
1111 * It looks something like this:
1112 *
1113 * 0x0f = 1111-Single Ended Low Byte Termination on/off
1114 * ||\-Single Ended High Byte Termination on/off
1115 * |\-LVD Low Byte Termination on/off
1116 * \-LVD High Byte Termination on/off
1117 *
1118 * For non-Ultra2 controllers, the upper 2 bits are not important. So, to
1119 * enable both high byte and low byte termination on scsi0, I would need to
1120 * make sure that the override_term variable was set to 0x03 (bits 0011).
1121 * To make sure that all termination is enabled on an Ultra2 controller at
1122 * scsi2 and only high byte termination on scsi1 and high and low byte
1123 * termination on scsi0, I would set override_term=0xf23 (bits 1111 0010 0011)
1124 *
1125 * For the most part, users should never have to use this, that's why I
1126 * left it fairly cryptic instead of easy to understand. If you need it,
1127 * most likely someone will be telling you what your's needs to be set to.
1128 */
1129 static int aic7xxx_override_term = -1;
1130 /*
1131 * Certain motherboard chipset controllers tend to screw
1132 * up the polarity of the term enable output pin. Use this variable
1133 * to force the correct polarity for your system. This is a bitfield variable
1134 * similar to the previous one, but this one has one bit per channel instead
1135 * of four.
1136 * 0 = Force the setting to active low.
1137 * 1 = Force setting to active high.
1138 * Most Adaptec cards are active high, several motherboards are active low.
1139 * To force a 2940 card at SCSI 0 to active high and a motherboard 7895
1140 * controller at scsi1 and scsi2 to active low, and a 2910 card at scsi3
1141 * to active high, you would need to set stpwlev=0x9 (bits 1001).
1142 *
1143 * People shouldn't need to use this, but if you are experiencing lots of
1144 * SCSI timeout problems, this may help. There is one sure way to test what
1145 * this option needs to be. Using a boot floppy to boot the system, configure
1146 * your system to enable all SCSI termination (in the Adaptec SCSI BIOS) and
1147 * if needed then also pass a value to override_term to make sure that the
1148 * driver is enabling SCSI termination, then set this variable to either 0
1149 * or 1. When the driver boots, make sure there are *NO* SCSI cables
1150 * connected to your controller. If it finds and inits the controller
1151 * without problem, then the setting you passed to stpwlev was correct. If
1152 * the driver goes into a reset loop and hangs the system, then you need the
1153 * other setting for this variable. If neither setting lets the machine
1154 * boot then you have definite termination problems that may not be fixable.
1155 */
1156 static int aic7xxx_stpwlev = -1;
1157 /*
1158 * Set this to non-0 in order to force the driver to panic the kernel
1159 * and print out debugging info on a SCSI abort or reset cycle.
1160 */
1161 static int aic7xxx_panic_on_abort = 0;
1162 /*
1163 * PCI bus parity checking of the Adaptec controllers. This is somewhat
1164 * dubious at best. To my knowledge, this option has never actually
1165 * solved a PCI parity problem, but on certain machines with broken PCI
1166 * chipset configurations, it can generate tons of false error messages.
1167 * It's included in the driver for completeness.
1168 * 0 = Shut off PCI parity check
1169 * -1 = Normal polarity pci parity checking
1170 * 1 = reverse polarity pci parity checking
1171 *
1172 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
1173 * variable to -1 you would actually want to simply pass the variable
1174 * name without a number. That will invert the 0 which will result in
1175 * -1.
1176 */
1177 static int aic7xxx_pci_parity = 0;
1178 /*
1179 * Set this to any non-0 value to cause us to dump the contents of all
1180 * the card's registers in a hex dump format tailored to each model of
1181 * controller.
1182 *
1183 * NOTE: THE CONTROLLER IS LEFT IN AN UNUSEABLE STATE BY THIS OPTION.
1184 * YOU CANNOT BOOT UP WITH THIS OPTION, IT IS FOR DEBUGGING PURPOSES
1185 * ONLY
1186 */
1187 static int aic7xxx_dump_card = 0;
1188 /*
1189 * Set this to a non-0 value to make us dump out the 32 bit instruction
1190 * registers on the card after completing the sequencer download. This
1191 * allows the actual sequencer download to be verified. It is possible
1192 * to use this option and still boot up and run your system. This is
1193 * only intended for debugging purposes.
1194 */
1195 static int aic7xxx_dump_sequencer = 0;
1196 /*
1197 * Certain newer motherboards have put new PCI based devices into the
1198 * IO spaces that used to typically be occupied by VLB or EISA cards.
1199 * This overlap can cause these newer motherboards to lock up when scanned
1200 * for older EISA and VLB devices. Setting this option to non-0 will
1201 * cause the driver to skip scanning for any VLB or EISA controllers and
1202 * only support the PCI controllers. NOTE: this means that if the kernel
1203 * os compiled with PCI support disabled, then setting this to non-0
1204 * would result in never finding any devices :)
1205 */
1206 static int aic7xxx_no_probe = 0;
1207 /*
1208 * On some machines, enabling the external SCB RAM isn't reliable yet. I
1209 * haven't had time to make test patches for things like changing the
1210 * timing mode on that external RAM either. Some of those changes may
1211 * fix the problem. Until then though, we default to external SCB RAM
1212 * off and give a command line option to enable it.
1213 */
1214 static int aic7xxx_scbram = 0;
1215 /*
1216 * So that we can set how long each device is given as a selection timeout.
1217 * The table of values goes like this:
1218 * 0 - 256ms
1219 * 1 - 128ms
1220 * 2 - 64ms
1221 * 3 - 32ms
1222 * We default to 64ms because it's fast. Some old SCSI-I devices need a
1223 * longer time. The final value has to be left shifted by 3, hence 0x10
1224 * is the final value.
1225 */
1226 static int aic7xxx_seltime = 0x10;
1227 /*
1228 * So that insmod can find the variable and make it point to something
1229 */
1230 #ifdef MODULE
1231 static char * aic7xxx = NULL;
1232 module_param(aic7xxx, charp, 0);
1233 #endif
1234
1235 #define VERBOSE_NORMAL 0x0000
1236 #define VERBOSE_NEGOTIATION 0x0001
1237 #define VERBOSE_SEQINT 0x0002
1238 #define VERBOSE_SCSIINT 0x0004
1239 #define VERBOSE_PROBE 0x0008
1240 #define VERBOSE_PROBE2 0x0010
1241 #define VERBOSE_NEGOTIATION2 0x0020
1242 #define VERBOSE_MINOR_ERROR 0x0040
1243 #define VERBOSE_TRACING 0x0080
1244 #define VERBOSE_ABORT 0x0f00
1245 #define VERBOSE_ABORT_MID 0x0100
1246 #define VERBOSE_ABORT_FIND 0x0200
1247 #define VERBOSE_ABORT_PROCESS 0x0400
1248 #define VERBOSE_ABORT_RETURN 0x0800
1249 #define VERBOSE_RESET 0xf000
1250 #define VERBOSE_RESET_MID 0x1000
1251 #define VERBOSE_RESET_FIND 0x2000
1252 #define VERBOSE_RESET_PROCESS 0x4000
1253 #define VERBOSE_RESET_RETURN 0x8000
1254 static int aic7xxx_verbose = VERBOSE_NORMAL | VERBOSE_NEGOTIATION |
1255 VERBOSE_PROBE; /* verbose messages */
1256
1257
1258 /****************************************************************************
1259 *
1260 * We're going to start putting in function declarations so that order of
1261 * functions is no longer important. As needed, they are added here.
1262 *
1263 ***************************************************************************/
1264
1265 static int aic7xxx_release(struct Scsi_Host *host);
1266 static void aic7xxx_set_syncrate(struct aic7xxx_host *p,
1267 struct aic7xxx_syncrate *syncrate, int target, int channel,
1268 unsigned int period, unsigned int offset, unsigned char options,
1269 unsigned int type, struct aic_dev_data *aic_dev);
1270 static void aic7xxx_set_width(struct aic7xxx_host *p, int target, int channel,
1271 int lun, unsigned int width, unsigned int type,
1272 struct aic_dev_data *aic_dev);
1273 static void aic7xxx_panic_abort(struct aic7xxx_host *p, struct scsi_cmnd *cmd);
1274 static void aic7xxx_print_card(struct aic7xxx_host *p);
1275 static void aic7xxx_print_scratch_ram(struct aic7xxx_host *p);
1276 static void aic7xxx_print_sequencer(struct aic7xxx_host *p, int downloaded);
1277 #ifdef AIC7XXX_VERBOSE_DEBUGGING
1278 static void aic7xxx_check_scbs(struct aic7xxx_host *p, char *buffer);
1279 #endif
1280
1281 /****************************************************************************
1282 *
1283 * These functions are now used. They happen to be wrapped in useless
1284 * inb/outb port read/writes around the real reads and writes because it
1285 * seems that certain very fast CPUs have a problem dealing with us when
1286 * going at full speed.
1287 *
1288 ***************************************************************************/
1289
1290 static unsigned char
1291 aic_inb(struct aic7xxx_host *p, long port)
1292 {
1293 #ifdef MMAPIO
1294 unsigned char x;
1295 if(p->maddr)
1296 {
1297 x = readb(p->maddr + port);
1298 }
1299 else
1300 {
1301 x = inb(p->base + port);
1302 }
1303 return(x);
1304 #else
1305 return(inb(p->base + port));
1306 #endif
1307 }
1308
1309 static void
1310 aic_outb(struct aic7xxx_host *p, unsigned char val, long port)
1311 {
1312 #ifdef MMAPIO
1313 if(p->maddr)
1314 {
1315 writeb(val, p->maddr + port);
1316 mb(); /* locked operation in order to force CPU ordering */
1317 readb(p->maddr + HCNTRL); /* dummy read to flush the PCI write */
1318 }
1319 else
1320 {
1321 outb(val, p->base + port);
1322 mb(); /* locked operation in order to force CPU ordering */
1323 }
1324 #else
1325 outb(val, p->base + port);
1326 mb(); /* locked operation in order to force CPU ordering */
1327 #endif
1328 }
1329
1330 /*+F*************************************************************************
1331 * Function:
1332 * aic7xxx_setup
1333 *
1334 * Description:
1335 * Handle Linux boot parameters. This routine allows for assigning a value
1336 * to a parameter with a ':' between the parameter and the value.
1337 * ie. aic7xxx=unpause:0x0A,extended
1338 *-F*************************************************************************/
1339 static int
1340 aic7xxx_setup(char *s)
1341 {
1342 int i, n;
1343 char *p;
1344 char *end;
1345
1346 static struct {
1347 const char *name;
1348 unsigned int *flag;
1349 } options[] = {
1350 { "extended", &aic7xxx_extended },
1351 { "no_reset", &aic7xxx_no_reset },
1352 { "irq_trigger", &aic7xxx_irq_trigger },
1353 { "verbose", &aic7xxx_verbose },
1354 { "reverse_scan",&aic7xxx_reverse_scan },
1355 { "override_term", &aic7xxx_override_term },
1356 { "stpwlev", &aic7xxx_stpwlev },
1357 { "no_probe", &aic7xxx_no_probe },
1358 { "panic_on_abort", &aic7xxx_panic_on_abort },
1359 { "pci_parity", &aic7xxx_pci_parity },
1360 { "dump_card", &aic7xxx_dump_card },
1361 { "dump_sequencer", &aic7xxx_dump_sequencer },
1362 { "default_queue_depth", &aic7xxx_default_queue_depth },
1363 { "scbram", &aic7xxx_scbram },
1364 { "seltime", &aic7xxx_seltime },
1365 { "tag_info", NULL }
1366 };
1367
1368 end = strchr(s, '\0');
1369
1370 while ((p = strsep(&s, ",.")) != NULL)
1371 {
1372 for (i = 0; i < ARRAY_SIZE(options); i++)
1373 {
1374 n = strlen(options[i].name);
1375 if (!strncmp(options[i].name, p, n))
1376 {
1377 if (!strncmp(p, "tag_info", n))
1378 {
1379 if (p[n] == ':')
1380 {
1381 char *base;
1382 char *tok, *tok_end, *tok_end2;
1383 char tok_list[] = { '.', ',', '{', '}', '\0' };
1384 int i, instance = -1, device = -1;
1385 unsigned char done = FALSE;
1386
1387 base = p;
1388 tok = base + n + 1; /* Forward us just past the ':' */
1389 tok_end = strchr(tok, '\0');
1390 if (tok_end < end)
1391 *tok_end = ',';
1392 while(!done)
1393 {
1394 switch(*tok)
1395 {
1396 case '{':
1397 if (instance == -1)
1398 instance = 0;
1399 else if (device == -1)
1400 device = 0;
1401 tok++;
1402 break;
1403 case '}':
1404 if (device != -1)
1405 device = -1;
1406 else if (instance != -1)
1407 instance = -1;
1408 tok++;
1409 break;
1410 case ',':
1411 case '.':
1412 if (instance == -1)
1413 done = TRUE;
1414 else if (device >= 0)
1415 device++;
1416 else if (instance >= 0)
1417 instance++;
1418 if ( (device >= MAX_TARGETS) ||
1419 (instance >= ARRAY_SIZE(aic7xxx_tag_info)) )
1420 done = TRUE;
1421 tok++;
1422 if (!done)
1423 {
1424 base = tok;
1425 }
1426 break;
1427 case '\0':
1428 done = TRUE;
1429 break;
1430 default:
1431 done = TRUE;
1432 tok_end = strchr(tok, '\0');
1433 for(i=0; tok_list[i]; i++)
1434 {
1435 tok_end2 = strchr(tok, tok_list[i]);
1436 if ( (tok_end2) && (tok_end2 < tok_end) )
1437 {
1438 tok_end = tok_end2;
1439 done = FALSE;
1440 }
1441 }
1442 if ( (instance >= 0) && (device >= 0) &&
1443 (instance < ARRAY_SIZE(aic7xxx_tag_info)) &&
1444 (device < MAX_TARGETS) )
1445 aic7xxx_tag_info[instance].tag_commands[device] =
1446 simple_strtoul(tok, NULL, 0) & 0xff;
1447 tok = tok_end;
1448 break;
1449 }
1450 }
1451 while((p != base) && (p != NULL))
1452 p = strsep(&s, ",.");
1453 }
1454 }
1455 else if (p[n] == ':')
1456 {
1457 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1458 if(!strncmp(p, "seltime", n))
1459 {
1460 *(options[i].flag) = (*(options[i].flag) % 4) << 3;
1461 }
1462 }
1463 else if (!strncmp(p, "verbose", n))
1464 {
1465 *(options[i].flag) = 0xff29;
1466 }
1467 else
1468 {
1469 *(options[i].flag) = ~(*(options[i].flag));
1470 if(!strncmp(p, "seltime", n))
1471 {
1472 *(options[i].flag) = (*(options[i].flag) % 4) << 3;
1473 }
1474 }
1475 }
1476 }
1477 }
1478 return 1;
1479 }
1480
1481 __setup("aic7xxx=", aic7xxx_setup);
1482
1483 /*+F*************************************************************************
1484 * Function:
1485 * pause_sequencer
1486 *
1487 * Description:
1488 * Pause the sequencer and wait for it to actually stop - this
1489 * is important since the sequencer can disable pausing for critical
1490 * sections.
1491 *-F*************************************************************************/
1492 static void
1493 pause_sequencer(struct aic7xxx_host *p)
1494 {
1495 aic_outb(p, p->pause, HCNTRL);
1496 while ((aic_inb(p, HCNTRL) & PAUSE) == 0)
1497 {
1498 ;
1499 }
1500 if(p->features & AHC_ULTRA2)
1501 {
1502 aic_inb(p, CCSCBCTL);
1503 }
1504 }
1505
1506 /*+F*************************************************************************
1507 * Function:
1508 * unpause_sequencer
1509 *
1510 * Description:
1511 * Unpause the sequencer. Unremarkable, yet done often enough to
1512 * warrant an easy way to do it.
1513 *-F*************************************************************************/
1514 static void
1515 unpause_sequencer(struct aic7xxx_host *p, int unpause_always)
1516 {
1517 if (unpause_always ||
1518 ( !(aic_inb(p, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) &&
1519 !(p->flags & AHC_HANDLING_REQINITS) ) )
1520 {
1521 aic_outb(p, p->unpause, HCNTRL);
1522 }
1523 }
1524
1525 /*+F*************************************************************************
1526 * Function:
1527 * restart_sequencer
1528 *
1529 * Description:
1530 * Restart the sequencer program from address zero. This assumes
1531 * that the sequencer is already paused.
1532 *-F*************************************************************************/
1533 static void
1534 restart_sequencer(struct aic7xxx_host *p)
1535 {
1536 aic_outb(p, 0, SEQADDR0);
1537 aic_outb(p, 0, SEQADDR1);
1538 aic_outb(p, FASTMODE, SEQCTL);
1539 }
1540
1541 /*
1542 * We include the aic7xxx_seq.c file here so that the other defines have
1543 * already been made, and so that it comes before the code that actually
1544 * downloads the instructions (since we don't typically use function
1545 * prototype, our code has to be ordered that way, it's a left-over from
1546 * the original driver days.....I should fix it some time DL).
1547 */
1548 #include "aic7xxx_old/aic7xxx_seq.c"
1549
1550 /*+F*************************************************************************
1551 * Function:
1552 * aic7xxx_check_patch
1553 *
1554 * Description:
1555 * See if the next patch to download should be downloaded.
1556 *-F*************************************************************************/
1557 static int
1558 aic7xxx_check_patch(struct aic7xxx_host *p,
1559 struct sequencer_patch **start_patch, int start_instr, int *skip_addr)
1560 {
1561 struct sequencer_patch *cur_patch;
1562 struct sequencer_patch *last_patch;
1563 int num_patches;
1564
1565 num_patches = ARRAY_SIZE(sequencer_patches);
1566 last_patch = &sequencer_patches[num_patches];
1567 cur_patch = *start_patch;
1568
1569 while ((cur_patch < last_patch) && (start_instr == cur_patch->begin))
1570 {
1571 if (cur_patch->patch_func(p) == 0)
1572 {
1573 /*
1574 * Start rejecting code.
1575 */
1576 *skip_addr = start_instr + cur_patch->skip_instr;
1577 cur_patch += cur_patch->skip_patch;
1578 }
1579 else
1580 {
1581 /*
1582 * Found an OK patch. Advance the patch pointer to the next patch
1583 * and wait for our instruction pointer to get here.
1584 */
1585 cur_patch++;
1586 }
1587 }
1588
1589 *start_patch = cur_patch;
1590 if (start_instr < *skip_addr)
1591 /*
1592 * Still skipping
1593 */
1594 return (0);
1595 return(1);
1596 }
1597
1598
1599 /*+F*************************************************************************
1600 * Function:
1601 * aic7xxx_download_instr
1602 *
1603 * Description:
1604 * Find the next patch to download.
1605 *-F*************************************************************************/
1606 static void
1607 aic7xxx_download_instr(struct aic7xxx_host *p, int instrptr,
1608 unsigned char *dconsts)
1609 {
1610 union ins_formats instr;
1611 struct ins_format1 *fmt1_ins;
1612 struct ins_format3 *fmt3_ins;
1613 unsigned char opcode;
1614
1615 instr = *(union ins_formats*) &seqprog[instrptr * 4];
1616
1617 instr.integer = le32_to_cpu(instr.integer);
1618
1619 fmt1_ins = &instr.format1;
1620 fmt3_ins = NULL;
1621
1622 /* Pull the opcode */
1623 opcode = instr.format1.opcode;
1624 switch (opcode)
1625 {
1626 case AIC_OP_JMP:
1627 case AIC_OP_JC:
1628 case AIC_OP_JNC:
1629 case AIC_OP_CALL:
1630 case AIC_OP_JNE:
1631 case AIC_OP_JNZ:
1632 case AIC_OP_JE:
1633 case AIC_OP_JZ:
1634 {
1635 struct sequencer_patch *cur_patch;
1636 int address_offset;
1637 unsigned int address;
1638 int skip_addr;
1639 int i;
1640
1641 fmt3_ins = &instr.format3;
1642 address_offset = 0;
1643 address = fmt3_ins->address;
1644 cur_patch = sequencer_patches;
1645 skip_addr = 0;
1646
1647 for (i = 0; i < address;)
1648 {
1649 aic7xxx_check_patch(p, &cur_patch, i, &skip_addr);
1650 if (skip_addr > i)
1651 {
1652 int end_addr;
1653
1654 end_addr = min_t(int, address, skip_addr);
1655 address_offset += end_addr - i;
1656 i = skip_addr;
1657 }
1658 else
1659 {
1660 i++;
1661 }
1662 }
1663 address -= address_offset;
1664 fmt3_ins->address = address;
1665 /* Fall Through to the next code section */
1666 }
1667 case AIC_OP_OR:
1668 case AIC_OP_AND:
1669 case AIC_OP_XOR:
1670 case AIC_OP_ADD:
1671 case AIC_OP_ADC:
1672 case AIC_OP_BMOV:
1673 if (fmt1_ins->parity != 0)
1674 {
1675 fmt1_ins->immediate = dconsts[fmt1_ins->immediate];
1676 }
1677 fmt1_ins->parity = 0;
1678 /* Fall Through to the next code section */
1679 case AIC_OP_ROL:
1680 if ((p->features & AHC_ULTRA2) != 0)
1681 {
1682 int i, count;
1683
1684 /* Calculate odd parity for the instruction */
1685 for ( i=0, count=0; i < 31; i++)
1686 {
1687 unsigned int mask;
1688
1689 mask = 0x01 << i;
1690 if ((instr.integer & mask) != 0)
1691 count++;
1692 }
1693 if (!(count & 0x01))
1694 instr.format1.parity = 1;
1695 }
1696 else
1697 {
1698 if (fmt3_ins != NULL)
1699 {
1700 instr.integer = fmt3_ins->immediate |
1701 (fmt3_ins->source << 8) |
1702 (fmt3_ins->address << 16) |
1703 (fmt3_ins->opcode << 25);
1704 }
1705 else
1706 {
1707 instr.integer = fmt1_ins->immediate |
1708 (fmt1_ins->source << 8) |
1709 (fmt1_ins->destination << 16) |
1710 (fmt1_ins->ret << 24) |
1711 (fmt1_ins->opcode << 25);
1712 }
1713 }
1714 aic_outb(p, (instr.integer & 0xff), SEQRAM);
1715 aic_outb(p, ((instr.integer >> 8) & 0xff), SEQRAM);
1716 aic_outb(p, ((instr.integer >> 16) & 0xff), SEQRAM);
1717 aic_outb(p, ((instr.integer >> 24) & 0xff), SEQRAM);
1718 udelay(10);
1719 break;
1720
1721 default:
1722 panic("aic7xxx: Unknown opcode encountered in sequencer program.");
1723 break;
1724 }
1725 }
1726
1727
1728 /*+F*************************************************************************
1729 * Function:
1730 * aic7xxx_loadseq
1731 *
1732 * Description:
1733 * Load the sequencer code into the controller memory.
1734 *-F*************************************************************************/
1735 static void
1736 aic7xxx_loadseq(struct aic7xxx_host *p)
1737 {
1738 struct sequencer_patch *cur_patch;
1739 int i;
1740 int downloaded;
1741 int skip_addr;
1742 unsigned char download_consts[4] = {0, 0, 0, 0};
1743
1744 if (aic7xxx_verbose & VERBOSE_PROBE)
1745 {
1746 printk(KERN_INFO "(scsi%d) Downloading sequencer code...", p->host_no);
1747 }
1748 #if 0
1749 download_consts[TMODE_NUMCMDS] = p->num_targetcmds;
1750 #endif
1751 download_consts[TMODE_NUMCMDS] = 0;
1752 cur_patch = &sequencer_patches[0];
1753 downloaded = 0;
1754 skip_addr = 0;
1755
1756 aic_outb(p, PERRORDIS|LOADRAM|FAILDIS|FASTMODE, SEQCTL);
1757 aic_outb(p, 0, SEQADDR0);
1758 aic_outb(p, 0, SEQADDR1);
1759
1760 for (i = 0; i < sizeof(seqprog) / 4; i++)
1761 {
1762 if (aic7xxx_check_patch(p, &cur_patch, i, &skip_addr) == 0)
1763 {
1764 /* Skip this instruction for this configuration. */
1765 continue;
1766 }
1767 aic7xxx_download_instr(p, i, &download_consts[0]);
1768 downloaded++;
1769 }
1770
1771 aic_outb(p, 0, SEQADDR0);
1772 aic_outb(p, 0, SEQADDR1);
1773 aic_outb(p, FASTMODE | FAILDIS, SEQCTL);
1774 unpause_sequencer(p, TRUE);
1775 mdelay(1);
1776 pause_sequencer(p);
1777 aic_outb(p, FASTMODE, SEQCTL);
1778 if (aic7xxx_verbose & VERBOSE_PROBE)
1779 {
1780 printk(" %d instructions downloaded\n", downloaded);
1781 }
1782 if (aic7xxx_dump_sequencer)
1783 aic7xxx_print_sequencer(p, downloaded);
1784 }
1785
1786 /*+F*************************************************************************
1787 * Function:
1788 * aic7xxx_print_sequencer
1789 *
1790 * Description:
1791 * Print the contents of the sequencer memory to the screen.
1792 *-F*************************************************************************/
1793 static void
1794 aic7xxx_print_sequencer(struct aic7xxx_host *p, int downloaded)
1795 {
1796 int i, k, temp;
1797
1798 aic_outb(p, PERRORDIS|LOADRAM|FAILDIS|FASTMODE, SEQCTL);
1799 aic_outb(p, 0, SEQADDR0);
1800 aic_outb(p, 0, SEQADDR1);
1801
1802 k = 0;
1803 for (i=0; i < downloaded; i++)
1804 {
1805 if ( k == 0 )
1806 printk("%03x: ", i);
1807 temp = aic_inb(p, SEQRAM);
1808 temp |= (aic_inb(p, SEQRAM) << 8);
1809 temp |= (aic_inb(p, SEQRAM) << 16);
1810 temp |= (aic_inb(p, SEQRAM) << 24);
1811 printk("%08x", temp);
1812 if ( ++k == 8 )
1813 {
1814 printk("\n");
1815 k = 0;
1816 }
1817 else
1818 printk(" ");
1819 }
1820 aic_outb(p, 0, SEQADDR0);
1821 aic_outb(p, 0, SEQADDR1);
1822 aic_outb(p, FASTMODE | FAILDIS, SEQCTL);
1823 unpause_sequencer(p, TRUE);
1824 mdelay(1);
1825 pause_sequencer(p);
1826 aic_outb(p, FASTMODE, SEQCTL);
1827 printk("\n");
1828 }
1829
1830 /*+F*************************************************************************
1831 * Function:
1832 * aic7xxx_info
1833 *
1834 * Description:
1835 * Return a string describing the driver.
1836 *-F*************************************************************************/
1837 static const char *
1838 aic7xxx_info(struct Scsi_Host *dooh)
1839 {
1840 static char buffer[256];
1841 char *bp;
1842 struct aic7xxx_host *p;
1843
1844 bp = &buffer[0];
1845 p = (struct aic7xxx_host *)dooh->hostdata;
1846 memset(bp, 0, sizeof(buffer));
1847 strcpy(bp, "Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) ");
1848 strcat(bp, AIC7XXX_C_VERSION);
1849 strcat(bp, "/");
1850 strcat(bp, AIC7XXX_H_VERSION);
1851 strcat(bp, "\n");
1852 strcat(bp, " <");
1853 strcat(bp, board_names[p->board_name_index]);
1854 strcat(bp, ">");
1855
1856 return(bp);
1857 }
1858
1859 /*+F*************************************************************************
1860 * Function:
1861 * aic7xxx_find_syncrate
1862 *
1863 * Description:
1864 * Look up the valid period to SCSIRATE conversion in our table
1865 *-F*************************************************************************/
1866 static struct aic7xxx_syncrate *
1867 aic7xxx_find_syncrate(struct aic7xxx_host *p, unsigned int *period,
1868 unsigned int maxsync, unsigned char *options)
1869 {
1870 struct aic7xxx_syncrate *syncrate;
1871 int done = FALSE;
1872
1873 switch(*options)
1874 {
1875 case MSG_EXT_PPR_OPTION_DT_CRC:
1876 case MSG_EXT_PPR_OPTION_DT_UNITS:
1877 if(!(p->features & AHC_ULTRA3))
1878 {
1879 *options = 0;
1880 maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2);
1881 }
1882 break;
1883 case MSG_EXT_PPR_OPTION_DT_CRC_QUICK:
1884 case MSG_EXT_PPR_OPTION_DT_UNITS_QUICK:
1885 if(!(p->features & AHC_ULTRA3))
1886 {
1887 *options = 0;
1888 maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2);
1889 }
1890 else
1891 {
1892 /*
1893 * we don't support the Quick Arbitration variants of dual edge
1894 * clocking. As it turns out, we want to send back the
1895 * same basic option, but without the QA attribute.
1896 * We know that we are responding because we would never set
1897 * these options ourself, we would only respond to them.
1898 */
1899 switch(*options)
1900 {
1901 case MSG_EXT_PPR_OPTION_DT_CRC_QUICK:
1902 *options = MSG_EXT_PPR_OPTION_DT_CRC;
1903 break;
1904 case MSG_EXT_PPR_OPTION_DT_UNITS_QUICK:
1905 *options = MSG_EXT_PPR_OPTION_DT_UNITS;
1906 break;
1907 }
1908 }
1909 break;
1910 default:
1911 *options = 0;
1912 maxsync = max_t(unsigned int, maxsync, AHC_SYNCRATE_ULTRA2);
1913 break;
1914 }
1915 syncrate = &aic7xxx_syncrates[maxsync];
1916 while ( (syncrate->rate[0] != NULL) &&
1917 (!(p->features & AHC_ULTRA2) || syncrate->sxfr_ultra2) )
1918 {
1919 if (*period <= syncrate->period)
1920 {
1921 switch(*options)
1922 {
1923 case MSG_EXT_PPR_OPTION_DT_CRC:
1924 case MSG_EXT_PPR_OPTION_DT_UNITS:
1925 if(!(syncrate->sxfr_ultra2 & AHC_SYNCRATE_CRC))
1926 {
1927 done = TRUE;
1928 /*
1929 * oops, we went too low for the CRC/DualEdge signalling, so
1930 * clear the options byte
1931 */
1932 *options = 0;
1933 /*
1934 * We'll be sending a reply to this packet to set the options
1935 * properly, so unilaterally set the period as well.
1936 */
1937 *period = syncrate->period;
1938 }
1939 else
1940 {
1941 done = TRUE;
1942 if(syncrate == &aic7xxx_syncrates[maxsync])
1943 {
1944 *period = syncrate->period;
1945 }
1946 }
1947 break;
1948 default:
1949 if(!(syncrate->sxfr_ultra2 & AHC_SYNCRATE_CRC))
1950 {
1951 done = TRUE;
1952 if(syncrate == &aic7xxx_syncrates[maxsync])
1953 {
1954 *period = syncrate->period;
1955 }
1956 }
1957 break;
1958 }
1959 if(done)
1960 {
1961 break;
1962 }
1963 }
1964 syncrate++;
1965 }
1966 if ( (*period == 0) || (syncrate->rate[0] == NULL) ||
1967 ((p->features & AHC_ULTRA2) && (syncrate->sxfr_ultra2 == 0)) )
1968 {
1969 /*
1970 * Use async transfers for this target
1971 */
1972 *options = 0;
1973 *period = 255;
1974 syncrate = NULL;
1975 }
1976 return (syncrate);
1977 }
1978
1979
1980 /*+F*************************************************************************
1981 * Function:
1982 * aic7xxx_find_period
1983 *
1984 * Description:
1985 * Look up the valid SCSIRATE to period conversion in our table
1986 *-F*************************************************************************/
1987 static unsigned int
1988 aic7xxx_find_period(struct aic7xxx_host *p, unsigned int scsirate,
1989 unsigned int maxsync)
1990 {
1991 struct aic7xxx_syncrate *syncrate;
1992
1993 if (p->features & AHC_ULTRA2)
1994 {
1995 scsirate &= SXFR_ULTRA2;
1996 }
1997 else
1998 {
1999 scsirate &= SXFR;
2000 }
2001
2002 syncrate = &aic7xxx_syncrates[maxsync];
2003 while (syncrate->rate[0] != NULL)
2004 {
2005 if (p->features & AHC_ULTRA2)
2006 {
2007 if (syncrate->sxfr_ultra2 == 0)
2008 break;
2009 else if (scsirate == syncrate->sxfr_ultra2)
2010 return (syncrate->period);
2011 else if (scsirate == (syncrate->sxfr_ultra2 & ~AHC_SYNCRATE_CRC))
2012 return (syncrate->period);
2013 }
2014 else if (scsirate == (syncrate->sxfr & ~ULTRA_SXFR))
2015 {
2016 return (syncrate->period);
2017 }
2018 syncrate++;
2019 }
2020 return (0); /* async */
2021 }
2022
2023 /*+F*************************************************************************
2024 * Function:
2025 * aic7xxx_validate_offset
2026 *
2027 * Description:
2028 * Set a valid offset value for a particular card in use and transfer
2029 * settings in use.
2030 *-F*************************************************************************/
2031 static void
2032 aic7xxx_validate_offset(struct aic7xxx_host *p,
2033 struct aic7xxx_syncrate *syncrate, unsigned int *offset, int wide)
2034 {
2035 unsigned int maxoffset;
2036
2037 /* Limit offset to what the card (and device) can do */
2038 if (syncrate == NULL)
2039 {
2040 maxoffset = 0;
2041 }
2042 else if (p->features & AHC_ULTRA2)
2043 {
2044 maxoffset = MAX_OFFSET_ULTRA2;
2045 }
2046 else
2047 {
2048 if (wide)
2049 maxoffset = MAX_OFFSET_16BIT;
2050 else
2051 maxoffset = MAX_OFFSET_8BIT;
2052 }
2053 *offset = min(*offset, maxoffset);
2054 }
2055
2056 /*+F*************************************************************************
2057 * Function:
2058 * aic7xxx_set_syncrate
2059 *
2060 * Description:
2061 * Set the actual syncrate down in the card and in our host structs
2062 *-F*************************************************************************/
2063 static void
2064 aic7xxx_set_syncrate(struct aic7xxx_host *p, struct aic7xxx_syncrate *syncrate,
2065 int target, int channel, unsigned int period, unsigned int offset,
2066 unsigned char options, unsigned int type, struct aic_dev_data *aic_dev)
2067 {
2068 unsigned char tindex;
2069 unsigned short target_mask;
2070 unsigned char lun, old_options;
2071 unsigned int old_period, old_offset;
2072
2073 tindex = target | (channel << 3);
2074 target_mask = 0x01 << tindex;
2075 lun = aic_inb(p, SCB_TCL) & 0x07;
2076
2077 if (syncrate == NULL)
2078 {
2079 period = 0;
2080 offset = 0;
2081 }
2082
2083 old_period = aic_dev->cur.period;
2084 old_offset = aic_dev->cur.offset;
2085 old_options = aic_dev->cur.options;
2086
2087
2088 if (type & AHC_TRANS_CUR)
2089 {
2090 unsigned int scsirate;
2091
2092 scsirate = aic_inb(p, TARG_SCSIRATE + tindex);
2093 if (p->features & AHC_ULTRA2)
2094 {
2095 scsirate &= ~SXFR_ULTRA2;
2096 if (syncrate != NULL)
2097 {
2098 switch(options)
2099 {
2100 case MSG_EXT_PPR_OPTION_DT_UNITS:
2101 /*
2102 * mask off the CRC bit in the xfer settings
2103 */
2104 scsirate |= (syncrate->sxfr_ultra2 & ~AHC_SYNCRATE_CRC);
2105 break;
2106 default:
2107 scsirate |= syncrate->sxfr_ultra2;
2108 break;
2109 }
2110 }
2111 if (type & AHC_TRANS_ACTIVE)
2112 {
2113 aic_outb(p, offset, SCSIOFFSET);
2114 }
2115 aic_outb(p, offset, TARG_OFFSET + tindex);
2116 }
2117 else /* Not an Ultra2 controller */
2118 {
2119 scsirate &= ~(SXFR|SOFS);
2120 p->ultraenb &= ~target_mask;
2121 if (syncrate != NULL)
2122 {
2123 if (syncrate->sxfr & ULTRA_SXFR)
2124 {
2125 p->ultraenb |= target_mask;
2126 }
2127 scsirate |= (syncrate->sxfr & SXFR);
2128 scsirate |= (offset & SOFS);
2129 }
2130 if (type & AHC_TRANS_ACTIVE)
2131 {
2132 unsigned char sxfrctl0;
2133
2134 sxfrctl0 = aic_inb(p, SXFRCTL0);
2135 sxfrctl0 &= ~FAST20;
2136 if (p->ultraenb & target_mask)
2137 sxfrctl0 |= FAST20;
2138 aic_outb(p, sxfrctl0, SXFRCTL0);
2139 }
2140 aic_outb(p, p->ultraenb & 0xff, ULTRA_ENB);
2141 aic_outb(p, (p->ultraenb >> 8) & 0xff, ULTRA_ENB + 1 );
2142 }
2143 if (type & AHC_TRANS_ACTIVE)
2144 {
2145 aic_outb(p, scsirate, SCSIRATE);
2146 }
2147 aic_outb(p, scsirate, TARG_SCSIRATE + tindex);
2148 aic_dev->cur.period = period;
2149 aic_dev->cur.offset = offset;
2150 aic_dev->cur.options = options;
2151 if ( !(type & AHC_TRANS_QUITE) &&
2152 (aic7xxx_verbose & VERBOSE_NEGOTIATION) &&
2153 (aic_dev->flags & DEVICE_PRINT_DTR) )
2154 {
2155 if (offset)
2156 {
2157 int rate_mod = (scsirate & WIDEXFER) ? 1 : 0;
2158
2159 printk(INFO_LEAD "Synchronous at %s Mbyte/sec, "
2160 "offset %d.\n", p->host_no, channel, target, lun,
2161 syncrate->rate[rate_mod], offset);
2162 }
2163 else
2164 {
2165 printk(INFO_LEAD "Using asynchronous transfers.\n",
2166 p->host_no, channel, target, lun);
2167 }
2168 aic_dev->flags &= ~DEVICE_PRINT_DTR;
2169 }
2170 }
2171
2172 if (type & AHC_TRANS_GOAL)
2173 {
2174 aic_dev->goal.period = period;
2175 aic_dev->goal.offset = offset;
2176 aic_dev->goal.options = options;
2177 }
2178
2179 if (type & AHC_TRANS_USER)
2180 {
2181 p->user[tindex].period = period;
2182 p->user[tindex].offset = offset;
2183 p->user[tindex].options = options;
2184 }
2185 }
2186
2187 /*+F*************************************************************************
2188 * Function:
2189 * aic7xxx_set_width
2190 *
2191 * Description:
2192 * Set the actual width down in the card and in our host structs
2193 *-F*************************************************************************/
2194 static void
2195 aic7xxx_set_width(struct aic7xxx_host *p, int target, int channel, int lun,
2196 unsigned int width, unsigned int type, struct aic_dev_data *aic_dev)
2197 {
2198 unsigned char tindex;
2199 unsigned short target_mask;
2200 unsigned int old_width;
2201
2202 tindex = target | (channel << 3);
2203 target_mask = 1 << tindex;
2204
2205 old_width = aic_dev->cur.width;
2206
2207 if (type & AHC_TRANS_CUR)
2208 {
2209 unsigned char scsirate;
2210
2211 scsirate = aic_inb(p, TARG_SCSIRATE + tindex);
2212
2213 scsirate &= ~WIDEXFER;
2214 if (width == MSG_EXT_WDTR_BUS_16_BIT)
2215 scsirate |= WIDEXFER;
2216
2217 aic_outb(p, scsirate, TARG_SCSIRATE + tindex);
2218
2219 if (type & AHC_TRANS_ACTIVE)
2220 aic_outb(p, scsirate, SCSIRATE);
2221
2222 aic_dev->cur.width = width;
2223
2224 if ( !(type & AHC_TRANS_QUITE) &&
2225 (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
2226 (aic_dev->flags & DEVICE_PRINT_DTR) )
2227 {
2228 printk(INFO_LEAD "Using %s transfers\n", p->host_no, channel, target,
2229 lun, (scsirate & WIDEXFER) ? "Wide(16bit)" : "Narrow(8bit)" );
2230 }
2231 }
2232
2233 if (type & AHC_TRANS_GOAL)
2234 aic_dev->goal.width = width;
2235 if (type & AHC_TRANS_USER)
2236 p->user[tindex].width = width;
2237
2238 if (aic_dev->goal.offset)
2239 {
2240 if (p->features & AHC_ULTRA2)
2241 {
2242 aic_dev->goal.offset = MAX_OFFSET_ULTRA2;
2243 }
2244 else if (width == MSG_EXT_WDTR_BUS_16_BIT)
2245 {
2246 aic_dev->goal.offset = MAX_OFFSET_16BIT;
2247 }
2248 else
2249 {
2250 aic_dev->goal.offset = MAX_OFFSET_8BIT;
2251 }
2252 }
2253 }
2254
2255 /*+F*************************************************************************
2256 * Function:
2257 * scbq_init
2258 *
2259 * Description:
2260 * SCB queue initialization.
2261 *
2262 *-F*************************************************************************/
2263 static void
2264 scbq_init(volatile scb_queue_type *queue)
2265 {
2266 queue->head = NULL;
2267 queue->tail = NULL;
2268 }
2269
2270 /*+F*************************************************************************
2271 * Function:
2272 * scbq_insert_head
2273 *
2274 * Description:
2275 * Add an SCB to the head of the list.
2276 *
2277 *-F*************************************************************************/
2278 static inline void
2279 scbq_insert_head(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
2280 {
2281 scb->q_next = queue->head;
2282 queue->head = scb;
2283 if (queue->tail == NULL) /* If list was empty, update tail. */
2284 queue->tail = queue->head;
2285 }
2286
2287 /*+F*************************************************************************
2288 * Function:
2289 * scbq_remove_head
2290 *
2291 * Description:
2292 * Remove an SCB from the head of the list.
2293 *
2294 *-F*************************************************************************/
2295 static inline struct aic7xxx_scb *
2296 scbq_remove_head(volatile scb_queue_type *queue)
2297 {
2298 struct aic7xxx_scb * scbp;
2299
2300 scbp = queue->head;
2301 if (queue->head != NULL)
2302 queue->head = queue->head->q_next;
2303 if (queue->head == NULL) /* If list is now empty, update tail. */
2304 queue->tail = NULL;
2305 return(scbp);
2306 }
2307
2308 /*+F*************************************************************************
2309 * Function:
2310 * scbq_remove
2311 *
2312 * Description:
2313 * Removes an SCB from the list.
2314 *
2315 *-F*************************************************************************/
2316 static inline void
2317 scbq_remove(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
2318 {
2319 if (queue->head == scb)
2320 {
2321 /* At beginning of queue, remove from head. */
2322 scbq_remove_head(queue);
2323 }
2324 else
2325 {
2326 struct aic7xxx_scb *curscb = queue->head;
2327
2328 /*
2329 * Search until the next scb is the one we're looking for, or
2330 * we run out of queue.
2331 */
2332 while ((curscb != NULL) && (curscb->q_next != scb))
2333 {
2334 curscb = curscb->q_next;
2335 }
2336 if (curscb != NULL)
2337 {
2338 /* Found it. */
2339 curscb->q_next = scb->q_next;
2340 if (scb->q_next == NULL)
2341 {
2342 /* Update the tail when removing the tail. */
2343 queue->tail = curscb;
2344 }
2345 }
2346 }
2347 }
2348
2349 /*+F*************************************************************************
2350 * Function:
2351 * scbq_insert_tail
2352 *
2353 * Description:
2354 * Add an SCB at the tail of the list.
2355 *
2356 *-F*************************************************************************/
2357 static inline void
2358 scbq_insert_tail(volatile scb_queue_type *queue, struct aic7xxx_scb *scb)
2359 {
2360 scb->q_next = NULL;
2361 if (queue->tail != NULL) /* Add the scb at the end of the list. */
2362 queue->tail->q_next = scb;
2363 queue->tail = scb; /* Update the tail. */
2364 if (queue->head == NULL) /* If list was empty, update head. */
2365 queue->head = queue->tail;
2366 }
2367
2368 /*+F*************************************************************************
2369 * Function:
2370 * aic7xxx_match_scb
2371 *
2372 * Description:
2373 * Checks to see if an scb matches the target/channel as specified.
2374 * If target is ALL_TARGETS (-1), then we're looking for any device
2375 * on the specified channel; this happens when a channel is going
2376 * to be reset and all devices on that channel must be aborted.
2377 *-F*************************************************************************/
2378 static int
2379 aic7xxx_match_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb,
2380 int target, int channel, int lun, unsigned char tag)
2381 {
2382 int targ = (scb->hscb->target_channel_lun >> 4) & 0x0F;
2383 int chan = (scb->hscb->target_channel_lun >> 3) & 0x01;
2384 int slun = scb->hscb->target_channel_lun & 0x07;
2385 int match;
2386
2387 match = ((chan == channel) || (channel == ALL_CHANNELS));
2388 if (match != 0)
2389 match = ((targ == target) || (target == ALL_TARGETS));
2390 if (match != 0)
2391 match = ((lun == slun) || (lun == ALL_LUNS));
2392 if (match != 0)
2393 match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL));
2394
2395 return (match);
2396 }
2397
2398 /*+F*************************************************************************
2399 * Function:
2400 * aic7xxx_add_curscb_to_free_list
2401 *
2402 * Description:
2403 * Adds the current scb (in SCBPTR) to the list of free SCBs.
2404 *-F*************************************************************************/
2405 static void
2406 aic7xxx_add_curscb_to_free_list(struct aic7xxx_host *p)
2407 {
2408 /*
2409 * Invalidate the tag so that aic7xxx_find_scb doesn't think
2410 * it's active
2411 */
2412 aic_outb(p, SCB_LIST_NULL, SCB_TAG);
2413 aic_outb(p, 0, SCB_CONTROL);
2414
2415 aic_outb(p, aic_inb(p, FREE_SCBH), SCB_NEXT);
2416 aic_outb(p, aic_inb(p, SCBPTR), FREE_SCBH);
2417 }
2418
2419 /*+F*************************************************************************
2420 * Function:
2421 * aic7xxx_rem_scb_from_disc_list
2422 *
2423 * Description:
2424 * Removes the current SCB from the disconnected list and adds it
2425 * to the free list.
2426 *-F*************************************************************************/
2427 static unsigned char
2428 aic7xxx_rem_scb_from_disc_list(struct aic7xxx_host *p, unsigned char scbptr,
2429 unsigned char prev)
2430 {
2431 unsigned char next;
2432
2433 aic_outb(p, scbptr, SCBPTR);
2434 next = aic_inb(p, SCB_NEXT);
2435 aic7xxx_add_curscb_to_free_list(p);
2436
2437 if (prev != SCB_LIST_NULL)
2438 {
2439 aic_outb(p, prev, SCBPTR);
2440 aic_outb(p, next, SCB_NEXT);
2441 }
2442 else
2443 {
2444 aic_outb(p, next, DISCONNECTED_SCBH);
2445 }
2446
2447 return next;
2448 }
2449
2450 /*+F*************************************************************************
2451 * Function:
2452 * aic7xxx_busy_target
2453 *
2454 * Description:
2455 * Set the specified target busy.
2456 *-F*************************************************************************/
2457 static inline void
2458 aic7xxx_busy_target(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
2459 {
2460 p->untagged_scbs[scb->hscb->target_channel_lun] = scb->hscb->tag;
2461 }
2462
2463 /*+F*************************************************************************
2464 * Function:
2465 * aic7xxx_index_busy_target
2466 *
2467 * Description:
2468 * Returns the index of the busy target, and optionally sets the
2469 * target inactive.
2470 *-F*************************************************************************/
2471 static inline unsigned char
2472 aic7xxx_index_busy_target(struct aic7xxx_host *p, unsigned char tcl,
2473 int unbusy)
2474 {
2475 unsigned char busy_scbid;
2476
2477 busy_scbid = p->untagged_scbs[tcl];
2478 if (unbusy)
2479 {
2480 p->untagged_scbs[tcl] = SCB_LIST_NULL;
2481 }
2482 return (busy_scbid);
2483 }
2484
2485 /*+F*************************************************************************
2486 * Function:
2487 * aic7xxx_find_scb
2488 *
2489 * Description:
2490 * Look through the SCB array of the card and attempt to find the
2491 * hardware SCB that corresponds to the passed in SCB. Return
2492 * SCB_LIST_NULL if unsuccessful. This routine assumes that the
2493 * card is already paused.
2494 *-F*************************************************************************/
2495 static unsigned char
2496 aic7xxx_find_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
2497 {
2498 unsigned char saved_scbptr;
2499 unsigned char curindex;
2500
2501 saved_scbptr = aic_inb(p, SCBPTR);
2502 curindex = 0;
2503 for (curindex = 0; curindex < p->scb_data->maxhscbs; curindex++)
2504 {
2505 aic_outb(p, curindex, SCBPTR);
2506 if (aic_inb(p, SCB_TAG) == scb->hscb->tag)
2507 {
2508 break;
2509 }
2510 }
2511 aic_outb(p, saved_scbptr, SCBPTR);
2512 if (curindex >= p->scb_data->maxhscbs)
2513 {
2514 curindex = SCB_LIST_NULL;
2515 }
2516
2517 return (curindex);
2518 }
2519
2520 /*+F*************************************************************************
2521 * Function:
2522 * aic7xxx_allocate_scb
2523 *
2524 * Description:
2525 * Get an SCB from the free list or by allocating a new one.
2526 *-F*************************************************************************/
2527 static int
2528 aic7xxx_allocate_scb(struct aic7xxx_host *p)
2529 {
2530 struct aic7xxx_scb *scbp = NULL;
2531 int scb_size = (sizeof (struct hw_scatterlist) * AIC7XXX_MAX_SG) + 12 + 6;
2532 int i;
2533 int step = PAGE_SIZE / 1024;
2534 unsigned long scb_count = 0;
2535 struct hw_scatterlist *hsgp;
2536 struct aic7xxx_scb *scb_ap;
2537 struct aic7xxx_scb_dma *scb_dma;
2538 unsigned char *bufs;
2539
2540 if (p->scb_data->numscbs < p->scb_data->maxscbs)
2541 {
2542 /*
2543 * Calculate the optimal number of SCBs to allocate.
2544 *
2545 * NOTE: This formula works because the sizeof(sg_array) is always
2546 * 1024. Therefore, scb_size * i would always be > PAGE_SIZE *
2547 * (i/step). The (i-1) allows the left hand side of the equation
2548 * to grow into the right hand side to a point of near perfect
2549 * efficiency since scb_size * (i -1) is growing slightly faster
2550 * than the right hand side. If the number of SG array elements
2551 * is changed, this function may not be near so efficient any more.
2552 *
2553 * Since the DMA'able buffers are now allocated in a separate
2554 * chunk this algorithm has been modified to match. The '12'
2555 * and '6' factors in scb_size are for the DMA'able command byte
2556 * and sensebuffers respectively. -DaveM
2557 */
2558 for ( i=step;; i *= 2 )
2559 {
2560 if ( (scb_size * (i-1)) >= ( (PAGE_SIZE * (i/step)) - 64 ) )
2561 {
2562 i /= 2;
2563 break;
2564 }
2565 }
2566 scb_count = min( (i-1), p->scb_data->maxscbs - p->scb_data->numscbs);
2567 scb_ap = kmalloc(sizeof (struct aic7xxx_scb) * scb_count
2568 + sizeof(struct aic7xxx_scb_dma), GFP_ATOMIC);
2569 if (scb_ap == NULL)
2570 return(0);
2571 scb_dma = (struct aic7xxx_scb_dma *)&scb_ap[scb_count];
2572 hsgp = (struct hw_scatterlist *)
2573 pci_alloc_consistent(p->pdev, scb_size * scb_count,
2574 &scb_dma->dma_address);
2575 if (hsgp == NULL)
2576 {
2577 kfree(scb_ap);
2578 return(0);
2579 }
2580 bufs = (unsigned char *)&hsgp[scb_count * AIC7XXX_MAX_SG];
2581 #ifdef AIC7XXX_VERBOSE_DEBUGGING
2582 if (aic7xxx_verbose > 0xffff)
2583 {
2584 if (p->scb_data->numscbs == 0)
2585 printk(INFO_LEAD "Allocating initial %ld SCB structures.\n",
2586 p->host_no, -1, -1, -1, scb_count);
2587 else
2588 printk(INFO_LEAD "Allocating %ld additional SCB structures.\n",
2589 p->host_no, -1, -1, -1, scb_count);
2590 }
2591 #endif
2592 memset(scb_ap, 0, sizeof (struct aic7xxx_scb) * scb_count);
2593 scb_dma->dma_offset = (unsigned long)scb_dma->dma_address
2594 - (unsigned long)hsgp;
2595 scb_dma->dma_len = scb_size * scb_count;
2596 for (i=0; i < scb_count; i++)
2597 {
2598 scbp = &scb_ap[i];
2599 scbp->hscb = &p->scb_data->hscbs[p->scb_data->numscbs];
2600 scbp->sg_list = &hsgp[i * AIC7XXX_MAX_SG];
2601 scbp->sense_cmd = bufs;
2602 scbp->cmnd = bufs + 6;
2603 bufs += 12 + 6;
2604 scbp->scb_dma = scb_dma;
2605 memset(scbp->hscb, 0, sizeof(struct aic7xxx_hwscb));
2606 scbp->hscb->tag = p->scb_data->numscbs;
2607 /*
2608 * Place in the scb array; never is removed
2609 */
2610 p->scb_data->scb_array[p->scb_data->numscbs++] = scbp;
2611 scbq_insert_tail(&p->scb_data->free_scbs, scbp);
2612 }
2613 scbp->kmalloc_ptr = scb_ap;
2614 }
2615 return(scb_count);
2616 }
2617
2618 /*+F*************************************************************************
2619 * Function:
2620 * aic7xxx_queue_cmd_complete
2621 *
2622 * Description:
2623 * Due to race conditions present in the SCSI subsystem, it is easier
2624 * to queue completed commands, then call scsi_done() on them when
2625 * we're finished. This function queues the completed commands.
2626 *-F*************************************************************************/
2627 static void
2628 aic7xxx_queue_cmd_complete(struct aic7xxx_host *p, struct scsi_cmnd *cmd)
2629 {
2630 aic7xxx_position(cmd) = SCB_LIST_NULL;
2631 cmd->host_scribble = (char *)p->completeq.head;
2632 p->completeq.head = cmd;
2633 }
2634
2635 /*+F*************************************************************************
2636 * Function:
2637 * aic7xxx_done_cmds_complete
2638 *
2639 * Description:
2640 * Process the completed command queue.
2641 *-F*************************************************************************/
2642 static void aic7xxx_done_cmds_complete(struct aic7xxx_host *p)
2643 {
2644 struct scsi_cmnd *cmd;
2645
2646 while (p->completeq.head != NULL) {
2647 cmd = p->completeq.head;
2648 p->completeq.head = (struct scsi_cmnd *) cmd->host_scribble;
2649 cmd->host_scribble = NULL;
2650 cmd->scsi_done(cmd);
2651 }
2652 }
2653
2654 /*+F*************************************************************************
2655 * Function:
2656 * aic7xxx_free_scb
2657 *
2658 * Description:
2659 * Free the scb and insert into the free scb list.
2660 *-F*************************************************************************/
2661 static void
2662 aic7xxx_free_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
2663 {
2664
2665 scb->flags = SCB_FREE;
2666 scb->cmd = NULL;
2667 scb->sg_count = 0;
2668 scb->sg_length = 0;
2669 scb->tag_action = 0;
2670 scb->hscb->control = 0;
2671 scb->hscb->target_status = 0;
2672 scb->hscb->target_channel_lun = SCB_LIST_NULL;
2673
2674 scbq_insert_head(&p->scb_data->free_scbs, scb);
2675 }
2676
2677 /*+F*************************************************************************
2678 * Function:
2679 * aic7xxx_done
2680 *
2681 * Description:
2682 * Calls the higher level scsi done function and frees the scb.
2683 *-F*************************************************************************/
2684 static void
2685 aic7xxx_done(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
2686 {
2687 struct scsi_cmnd *cmd = scb->cmd;
2688 struct aic_dev_data *aic_dev = cmd->device->hostdata;
2689 int tindex = TARGET_INDEX(cmd);
2690 struct aic7xxx_scb *scbp;
2691 unsigned char queue_depth;
2692
2693 scsi_dma_unmap(cmd);
2694
2695 if (scb->flags & SCB_SENSE)
2696 {
2697 pci_unmap_single(p->pdev,
2698 le32_to_cpu(scb->sg_list[0].address),
2699 SCSI_SENSE_BUFFERSIZE,
2700 PCI_DMA_FROMDEVICE);
2701 }
2702 if (scb->flags & SCB_RECOVERY_SCB)
2703 {
2704 p->flags &= ~AHC_ABORT_PENDING;
2705 }
2706 if (scb->flags & (SCB_RESET|SCB_ABORT))
2707 {
2708 cmd->result |= (DID_RESET << 16);
2709 }
2710
2711 if ((scb->flags & SCB_MSGOUT_BITS) != 0)
2712 {
2713 unsigned short mask;
2714 int message_error = FALSE;
2715
2716 mask = 0x01 << tindex;
2717
2718 /*
2719 * Check to see if we get an invalid message or a message error
2720 * after failing to negotiate a wide or sync transfer message.
2721 */
2722 if ((scb->flags & SCB_SENSE) &&
2723 ((scb->cmd->sense_buffer[12] == 0x43) || /* INVALID_MESSAGE */
2724 (scb->cmd->sense_buffer[12] == 0x49))) /* MESSAGE_ERROR */
2725 {
2726 message_error = TRUE;
2727 }
2728
2729 if (scb->flags & SCB_MSGOUT_WDTR)
2730 {
2731 if (message_error)
2732 {
2733 if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
2734 (aic_dev->flags & DEVICE_PRINT_DTR) )
2735 {
2736 printk(INFO_LEAD "Device failed to complete Wide Negotiation "
2737 "processing and\n", p->host_no, CTL_OF_SCB(scb));
2738 printk(INFO_LEAD "returned a sense error code for invalid message, "
2739 "disabling future\n", p->host_no, CTL_OF_SCB(scb));
2740 printk(INFO_LEAD "Wide negotiation to this device.\n", p->host_no,
2741 CTL_OF_SCB(scb));
2742 }
2743 aic_dev->needwdtr = aic_dev->needwdtr_copy = 0;
2744 }
2745 }
2746 if (scb->flags & SCB_MSGOUT_SDTR)
2747 {
2748 if (message_error)
2749 {
2750 if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
2751 (aic_dev->flags & DEVICE_PRINT_DTR) )
2752 {
2753 printk(INFO_LEAD "Device failed to complete Sync Negotiation "
2754 "processing and\n", p->host_no, CTL_OF_SCB(scb));
2755 printk(INFO_LEAD "returned a sense error code for invalid message, "
2756 "disabling future\n", p->host_no, CTL_OF_SCB(scb));
2757 printk(INFO_LEAD "Sync negotiation to this device.\n", p->host_no,
2758 CTL_OF_SCB(scb));
2759 aic_dev->flags &= ~DEVICE_PRINT_DTR;
2760 }
2761 aic_dev->needsdtr = aic_dev->needsdtr_copy = 0;
2762 }
2763 }
2764 if (scb->flags & SCB_MSGOUT_PPR)
2765 {
2766 if(message_error)
2767 {
2768 if ( (aic7xxx_verbose & VERBOSE_NEGOTIATION2) &&
2769 (aic_dev->flags & DEVICE_PRINT_DTR) )
2770 {
2771 printk(INFO_LEAD "Device failed to complete Parallel Protocol "
2772 "Request processing and\n", p->host_no, CTL_OF_SCB(scb));
2773 printk(INFO_LEAD "returned a sense error code for invalid message, "
2774 "disabling future\n", p->host_no, CTL_OF_SCB(scb));
2775 printk(INFO_LEAD "Parallel Protocol Request negotiation to this "
2776 "device.\n", p->host_no, CTL_OF_SCB(scb));
2777 }
2778 /*
2779 * Disable PPR negotiation and revert back to WDTR and SDTR setup
2780 */
2781 aic_dev->needppr = aic_dev->needppr_copy = 0;
2782 aic_dev->needsdtr = aic_dev->needsdtr_copy = 1;
2783 aic_dev->needwdtr = aic_dev->needwdtr_copy = 1;
2784 }
2785 }
2786 }
2787
2788 queue_depth = aic_dev->temp_q_depth;
2789 if (queue_depth >= aic_dev->active_cmds)
2790 {
2791 scbp = scbq_remove_head(&aic_dev->delayed_scbs);
2792 if (scbp)
2793 {
2794 if (queue_depth == 1)
2795 {
2796 /*
2797 * Give extra preference to untagged devices, such as CD-R devices
2798 * This makes it more likely that a drive *won't* stuff up while
2799 * waiting on data at a critical time, such as CD-R writing and
2800 * audio CD ripping operations. Should also benefit tape drives.
2801 */
2802 scbq_insert_head(&p->waiting_scbs, scbp);
2803 }
2804 else
2805 {
2806 scbq_insert_tail(&p->waiting_scbs, scbp);
2807 }
2808 #ifdef AIC7XXX_VERBOSE_DEBUGGING
2809 if (aic7xxx_verbose > 0xffff)
2810 printk(INFO_LEAD "Moving SCB from delayed to waiting queue.\n",
2811 p->host_no, CTL_OF_SCB(scbp));
2812 #endif
2813 if (queue_depth > aic_dev->active_cmds)
2814 {
2815 scbp = scbq_remove_head(&aic_dev->delayed_scbs);
2816 if (scbp)
2817 scbq_insert_tail(&p->waiting_scbs, scbp);
2818 }
2819 }
2820 }
2821 if (!(scb->tag_action))
2822 {
2823 aic7xxx_index_busy_target(p, scb->hscb->target_channel_lun,
2824 /* unbusy */ TRUE);
2825 if (cmd->device->simple_tags)
2826 {
2827 aic_dev->temp_q_depth = aic_dev->max_q_depth;
2828 }
2829 }
2830 if(scb->flags & SCB_DTR_SCB)
2831 {
2832 aic_dev->dtr_pending = 0;
2833 }
2834 aic_dev->active_cmds--;
2835 p->activescbs--;
2836
2837 if ((scb->sg_length >= 512) && (((cmd->result >> 16) & 0xf) == DID_OK))
2838 {
2839 long *ptr;
2840 int x, i;
2841
2842
2843 if (rq_data_dir(cmd->request) == WRITE)
2844 {
2845 aic_dev->w_total++;
2846 ptr = aic_dev->w_bins;
2847 }
2848 else
2849 {
2850 aic_dev->r_total++;
2851 ptr = aic_dev->r_bins;
2852 }
2853 if(cmd->device->simple_tags && cmd->request->cmd_flags & REQ_HARDBARRIER)
2854 {
2855 aic_dev->barrier_total++;
2856 if(scb->tag_action == MSG_ORDERED_Q_TAG)
2857 aic_dev->ordered_total++;
2858 }
2859 x = scb->sg_length;
2860 x >>= 10;
2861 for(i=0; i<6; i++)
2862 {
2863 x >>= 2;
2864 if(!x) {
2865 ptr[i]++;
2866 break;
2867 }
2868 }
2869 if(i == 6 && x)
2870 ptr[5]++;
2871 }
2872 aic7xxx_free_scb(p, scb);
2873 aic7xxx_queue_cmd_complete(p, cmd);
2874
2875 }
2876
2877 /*+F*************************************************************************
2878 * Function:
2879 * aic7xxx_run_done_queue
2880 *
2881 * Description:
2882 * Calls the aic7xxx_done() for the scsi_cmnd of each scb in the
2883 * aborted list, and adds each scb to the free list. If complete
2884 * is TRUE, we also process the commands complete list.
2885 *-F*************************************************************************/
2886 static void
2887 aic7xxx_run_done_queue(struct aic7xxx_host *p, /*complete*/ int complete)
2888 {
2889 struct aic7xxx_scb *scb;
2890 int i, found = 0;
2891
2892 for (i = 0; i < p->scb_data->numscbs; i++)
2893 {
2894 scb = p->scb_data->scb_array[i];
2895 if (scb->flags & SCB_QUEUED_FOR_DONE)
2896 {
2897 if (scb->flags & SCB_QUEUE_FULL)
2898 {
2899 scb->cmd->result = QUEUE_FULL << 1;
2900 }
2901 else
2902 {
2903 if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
2904 printk(INFO_LEAD "Aborting scb %d\n",
2905 p->host_no, CTL_OF_SCB(scb), scb->hscb->tag);
2906 /*
2907 * Clear any residual information since the normal aic7xxx_done() path
2908 * doesn't touch the residuals.
2909 */
2910 scb->hscb->residual_SG_segment_count = 0;
2911 scb->hscb->residual_data_count[0] = 0;
2912 scb->hscb->residual_data_count[1] = 0;
2913 scb->hscb->residual_data_count[2] = 0;
2914 }
2915 found++;
2916 aic7xxx_done(p, scb);
2917 }
2918 }
2919 if (aic7xxx_verbose & (VERBOSE_ABORT_RETURN | VERBOSE_RESET_RETURN))
2920 {
2921 printk(INFO_LEAD "%d commands found and queued for "
2922 "completion.\n", p->host_no, -1, -1, -1, found);
2923 }
2924 if (complete)
2925 {
2926 aic7xxx_done_cmds_complete(p);
2927 }
2928 }
2929
2930 /*+F*************************************************************************
2931 * Function:
2932 * aic7xxx_abort_waiting_scb
2933 *
2934 * Description:
2935 * Manipulate the waiting for selection list and return the
2936 * scb that follows the one that we remove.
2937 *-F*************************************************************************/
2938 static unsigned char
2939 aic7xxx_abort_waiting_scb(struct aic7xxx_host *p, struct aic7xxx_scb *scb,
2940 unsigned char scbpos, unsigned char prev)
2941 {
2942 unsigned char curscb, next;
2943
2944 /*
2945 * Select the SCB we want to abort and pull the next pointer out of it.
2946 */
2947 curscb = aic_inb(p, SCBPTR);
2948 aic_outb(p, scbpos, SCBPTR);
2949 next = aic_inb(p, SCB_NEXT);
2950
2951 aic7xxx_add_curscb_to_free_list(p);
2952
2953 /*
2954 * Update the waiting list
2955 */
2956 if (prev == SCB_LIST_NULL)
2957 {
2958 /*
2959 * First in the list
2960 */
2961 aic_outb(p, next, WAITING_SCBH);
2962 }
2963 else
2964 {
2965 /*
2966 * Select the scb that pointed to us and update its next pointer.
2967 */
2968 aic_outb(p, prev, SCBPTR);
2969 aic_outb(p, next, SCB_NEXT);
2970 }
2971 /*
2972 * Point us back at the original scb position and inform the SCSI
2973 * system that the command has been aborted.
2974 */
2975 aic_outb(p, curscb, SCBPTR);
2976 return (next);
2977 }
2978
2979 /*+F*************************************************************************
2980 * Function:
2981 * aic7xxx_search_qinfifo
2982 *
2983 * Description:
2984 * Search the queue-in FIFO for matching SCBs and conditionally
2985 * requeue. Returns the number of matching SCBs.
2986 *-F*************************************************************************/
2987 static int
2988 aic7xxx_search_qinfifo(struct aic7xxx_host *p, int target, int channel,
2989 int lun, unsigned char tag, int flags, int requeue,
2990 volatile scb_queue_type *queue)
2991 {
2992 int found;
2993 unsigned char qinpos, qintail;
2994 struct aic7xxx_scb *scbp;
2995
2996 found = 0;
2997 qinpos = aic_inb(p, QINPOS);
2998 qintail = p->qinfifonext;
2999
3000 p->qinfifonext = qinpos;
3001
3002 while (qinpos != qintail)
3003 {
3004 scbp = p->scb_data->scb_array[p->qinfifo[qinpos++]];
3005 if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
3006 {
3007 /*
3008 * We found an scb that needs to be removed.
3009 */
3010 if (requeue && (queue != NULL))
3011 {
3012 if (scbp->flags & SCB_WAITINGQ)
3013 {
3014 scbq_remove(queue, scbp);
3015 scbq_remove(&p->waiting_scbs, scbp);
3016 scbq_remove(&AIC_DEV(scbp->cmd)->delayed_scbs, scbp);
3017 AIC_DEV(scbp->cmd)->active_cmds++;
3018 p->activescbs++;
3019 }
3020 scbq_insert_tail(queue, scbp);
3021 AIC_DEV(scbp->cmd)->active_cmds--;
3022 p->activescbs--;
3023 scbp->flags |= SCB_WAITINGQ;
3024 if ( !(scbp->tag_action & TAG_ENB) )
3025 {
3026 aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
3027 TRUE);
3028 }
3029 }
3030 else if (requeue)
3031 {
3032 p->qinfifo[p->qinfifonext++] = scbp->hscb->tag;
3033 }
3034 else
3035 {
3036 /*
3037 * Preserve any SCB_RECOVERY_SCB flags on this scb then set the
3038 * flags we were called with, presumeably so aic7xxx_run_done_queue
3039 * can find this scb
3040 */
3041 scbp->flags = flags | (scbp->flags & SCB_RECOVERY_SCB);
3042 if (aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
3043 FALSE) == scbp->hscb->tag)
3044 {
3045 aic7xxx_index_busy_target(p, scbp->hscb->target_channel_lun,
3046 TRUE);
3047 }
3048 }
3049 found++;
3050 }
3051 else
3052 {
3053 p->qinfifo[p->qinfifonext++] = scbp->hscb->tag;
3054 }
3055 }
3056 /*
3057 * Now that we've done the work, clear out any left over commands in the
3058 * qinfifo and update the KERNEL_QINPOS down on the card.
3059 *
3060 * NOTE: This routine expect the sequencer to already be paused when
3061 * it is run....make sure it's that way!
3062 */
3063 qinpos = p->qinfifonext;
3064 while(qinpos != qintail)
3065 {
3066 p->qinfifo[qinpos++] = SCB_LIST_NULL;
3067 }
3068 if (p->features & AHC_QUEUE_REGS)
3069 aic_outb(p, p->qinfifonext, HNSCB_QOFF);
3070 else
3071 aic_outb(p, p->qinfifonext, KERNEL_QINPOS);
3072
3073 return (found);
3074 }
3075
3076 /*+F*************************************************************************
3077 * Function:
3078 * aic7xxx_scb_on_qoutfifo
3079 *
3080 * Description:
3081 * Is the scb that was passed to us currently on the qoutfifo?
3082 *-F*************************************************************************/
3083 static int
3084 aic7xxx_scb_on_qoutfifo(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
3085 {
3086 int i=0;
3087
3088 while(p->qoutfifo[(p->qoutfifonext + i) & 0xff ] != SCB_LIST_NULL)
3089 {
3090 if(p->qoutfifo[(p->qoutfifonext + i) & 0xff ] == scb->hscb->tag)
3091 return TRUE;
3092 else
3093 i++;
3094 }
3095 return FALSE;
3096 }
3097
3098
3099 /*+F*************************************************************************
3100 * Function:
3101 * aic7xxx_reset_device
3102 *
3103 * Description:
3104 * The device at the given target/channel has been reset. Abort
3105 * all active and queued scbs for that target/channel. This function
3106 * need not worry about linked next pointers because if was a MSG_ABORT_TAG
3107 * then we had a tagged command (no linked next), if it was MSG_ABORT or
3108 * MSG_BUS_DEV_RESET then the device won't know about any commands any more
3109 * and no busy commands will exist, and if it was a bus reset, then nothing
3110 * knows about any linked next commands any more. In all cases, we don't
3111 * need to worry about the linked next or busy scb, we just need to clear
3112 * them.
3113 *-F*************************************************************************/
3114 static void
3115 aic7xxx_reset_device(struct aic7xxx_host *p, int target, int channel,
3116 int lun, unsigned char tag)
3117 {
3118 struct aic7xxx_scb *scbp, *prev_scbp;
3119 struct scsi_device *sd;
3120 unsigned char active_scb, tcl, scb_tag;
3121 int i = 0, init_lists = FALSE;
3122 struct aic_dev_data *aic_dev;
3123
3124 /*
3125 * Restore this when we're done
3126 */
3127 active_scb = aic_inb(p, SCBPTR);
3128 scb_tag = aic_inb(p, SCB_TAG);
3129
3130 if (aic7xxx_verbose & (VERBOSE_RESET_PROCESS | VERBOSE_ABORT_PROCESS))
3131 {
3132 printk(INFO_LEAD "Reset device, hardware_scb %d,\n",
3133 p->host_no, channel, target, lun, active_scb);
3134 printk(INFO_LEAD "Current scb %d, SEQADDR 0x%x, LASTPHASE "
3135 "0x%x\n",
3136 p->host_no, channel, target, lun, scb_tag,
3137 aic_inb(p, SEQADDR0) | (aic_inb(p, SEQADDR1) << 8),
3138 aic_inb(p, LASTPHASE));
3139 printk(INFO_LEAD "SG_CACHEPTR 0x%x, SG_COUNT %d, SCSISIGI 0x%x\n",
3140 p->host_no, channel, target, lun,
3141 (p->features & AHC_ULTRA2) ? aic_inb(p, SG_CACHEPTR) : 0,
3142 aic_inb(p, SG_COUNT), aic_inb(p, SCSISIGI));
3143 printk(INFO_LEAD "SSTAT0 0x%x, SSTAT1 0x%x, SSTAT2 0x%x\n",
3144 p->host_no, channel, target, lun, aic_inb(p, SSTAT0),
3145 aic_inb(p, SSTAT1), aic_inb(p, SSTAT2));
3146 }
3147
3148 /*
3149 * Deal with the busy target and linked next issues.
3150 */
3151 list_for_each_entry(aic_dev, &p->aic_devs, list)
3152 {
3153 if (aic7xxx_verbose & (VERBOSE_RESET_PROCESS | VERBOSE_ABORT_PROCESS))
3154 printk(INFO_LEAD "processing aic_dev %p\n", p->host_no, channel, target,
3155 lun, aic_dev);
3156 sd = aic_dev->SDptr;
3157
3158 if((target != ALL_TARGETS && target != sd->id) ||
3159 (channel != ALL_CHANNELS && channel != sd->channel))
3160 continue;
3161 if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
3162 printk(INFO_LEAD "Cleaning up status information "
3163 "and delayed_scbs.\n", p->host_no, sd->channel, sd->id, sd->lun);
3164 aic_dev->flags &= ~BUS_DEVICE_RESET_PENDING;
3165 if ( tag == SCB_LIST_NULL )
3166 {
3167 aic_dev->dtr_pending = 0;
3168 aic_dev->needppr = aic_dev->needppr_copy;
3169 aic_dev->needsdtr = aic_dev->needsdtr_copy;
3170 aic_dev->needwdtr = aic_dev->needwdtr_copy;
3171 aic_dev->flags = DEVICE_PRINT_DTR;
3172 aic_dev->temp_q_depth = aic_dev->max_q_depth;
3173 }
3174 tcl = (sd->id << 4) | (sd->channel << 3) | sd->lun;
3175 if ( (aic7xxx_index_busy_target(p, tcl, FALSE) == tag) ||
3176 (tag == SCB_LIST_NULL) )
3177 aic7xxx_index_busy_target(p, tcl, /* unbusy */ TRUE);
3178 prev_scbp = NULL;
3179 scbp = aic_dev->delayed_scbs.head;
3180 while (scbp != NULL)
3181 {
3182 prev_scbp = scbp;
3183 scbp = scbp->q_next;
3184 if (aic7xxx_match_scb(p, prev_scbp, target, channel, lun, tag))
3185 {
3186 scbq_remove(&aic_dev->delayed_scbs, prev_scbp);
3187 if (prev_scbp->flags & SCB_WAITINGQ)
3188 {
3189 aic_dev->active_cmds++;
3190 p->activescbs++;
3191 }
3192 prev_scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
3193 prev_scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
3194 }
3195 }
3196 }
3197
3198 if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
3199 printk(INFO_LEAD "Cleaning QINFIFO.\n", p->host_no, channel, target, lun );
3200 aic7xxx_search_qinfifo(p, target, channel, lun, tag,
3201 SCB_RESET | SCB_QUEUED_FOR_DONE, /* requeue */ FALSE, NULL);
3202
3203 /*
3204 * Search the waiting_scbs queue for matches, this catches any SCB_QUEUED
3205 * ABORT/RESET commands.
3206 */
3207 if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
3208 printk(INFO_LEAD "Cleaning waiting_scbs.\n", p->host_no, channel,
3209 target, lun );
3210 {
3211 struct aic7xxx_scb *scbp, *prev_scbp;
3212
3213 prev_scbp = NULL;
3214 scbp = p->waiting_scbs.head;
3215 while (scbp != NULL)
3216 {
3217 prev_scbp = scbp;
3218 scbp = scbp->q_next;
3219 if (aic7xxx_match_scb(p, prev_scbp, target, channel, lun, tag))
3220 {
3221 scbq_remove(&p->waiting_scbs, prev_scbp);
3222 if (prev_scbp->flags & SCB_WAITINGQ)
3223 {
3224 AIC_DEV(prev_scbp->cmd)->active_cmds++;
3225 p->activescbs++;
3226 }
3227 prev_scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
3228 prev_scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
3229 }
3230 }
3231 }
3232
3233
3234 /*
3235 * Search waiting for selection list.
3236 */
3237 if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
3238 printk(INFO_LEAD "Cleaning waiting for selection "
3239 "list.\n", p->host_no, channel, target, lun);
3240 {
3241 unsigned char next, prev, scb_index;
3242
3243 next = aic_inb(p, WAITING_SCBH); /* Start at head of list. */
3244 prev = SCB_LIST_NULL;
3245 while (next != SCB_LIST_NULL)
3246 {
3247 aic_outb(p, next, SCBPTR);
3248 scb_index = aic_inb(p, SCB_TAG);
3249 if (scb_index >= p->scb_data->numscbs)
3250 {
3251 /*
3252 * No aic7xxx_verbose check here.....we want to see this since it
3253 * means either the kernel driver or the sequencer screwed things up
3254 */
3255 printk(WARN_LEAD "Waiting List inconsistency; SCB index=%d, "
3256 "numscbs=%d\n", p->host_no, channel, target, lun, scb_index,
3257 p->scb_data->numscbs);
3258 next = aic_inb(p, SCB_NEXT);
3259 aic7xxx_add_curscb_to_free_list(p);
3260 }
3261 else
3262 {
3263 scbp = p->scb_data->scb_array[scb_index];
3264 if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
3265 {
3266 next = aic7xxx_abort_waiting_scb(p, scbp, next, prev);
3267 if (scbp->flags & SCB_WAITINGQ)
3268 {
3269 AIC_DEV(scbp->cmd)->active_cmds++;
3270 p->activescbs++;
3271 }
3272 scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
3273 scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
3274 if (prev == SCB_LIST_NULL)
3275 {
3276 /*
3277 * This is either the first scb on the waiting list, or we
3278 * have already yanked the first and haven't left any behind.
3279 * Either way, we need to turn off the selection hardware if
3280 * it isn't already off.
3281 */
3282 aic_outb(p, aic_inb(p, SCSISEQ) & ~ENSELO, SCSISEQ);
3283 aic_outb(p, CLRSELTIMEO, CLRSINT1);
3284 }
3285 }
3286 else
3287 {
3288 prev = next;
3289 next = aic_inb(p, SCB_NEXT);
3290 }
3291 }
3292 }
3293 }
3294
3295 /*
3296 * Go through disconnected list and remove any entries we have queued
3297 * for completion, zeroing their control byte too.
3298 */
3299 if (aic7xxx_verbose & (VERBOSE_ABORT_PROCESS | VERBOSE_RESET_PROCESS))
3300 printk(INFO_LEAD "Cleaning disconnected scbs "
3301 "list.\n", p->host_no, channel, target, lun);
3302 if (p->flags & AHC_PAGESCBS)
3303 {
3304 unsigned char next, prev, scb_index;
3305
3306 next = aic_inb(p, DISCONNECTED_SCBH);
3307 prev = SCB_LIST_NULL;
3308 while (next != SCB_LIST_NULL)
3309 {
3310 aic_outb(p, next, SCBPTR);
3311 scb_index = aic_inb(p, SCB_TAG);
3312 if (scb_index > p->scb_data->numscbs)
3313 {
3314 printk(WARN_LEAD "Disconnected List inconsistency; SCB index=%d, "
3315 "numscbs=%d\n", p->host_no, channel, target, lun, scb_index,
3316 p->scb_data->numscbs);
3317 next = aic7xxx_rem_scb_from_disc_list(p, next, prev);
3318 }
3319 else
3320 {
3321 scbp = p->scb_data->scb_array[scb_index];
3322 if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
3323 {
3324 next = aic7xxx_rem_scb_from_disc_list(p, next, prev);
3325 if (scbp->flags & SCB_WAITINGQ)
3326 {
3327 AIC_DEV(scbp->cmd)->active_cmds++;
3328 p->activescbs++;
3329 }
3330 scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
3331 scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
3332 scbp->hscb->control = 0;
3333 }
3334 else
3335 {
3336 prev = next;
3337 next = aic_inb(p, SCB_NEXT);
3338 }
3339 }
3340 }
3341 }
3342
3343 /*
3344 * Walk the free list making sure no entries on the free list have
3345 * a valid SCB_TAG value or SCB_CONTROL byte.
3346 */
3347 if (p->flags & AHC_PAGESCBS)
3348 {
3349 unsigned char next;
3350
3351 next = aic_inb(p, FREE_SCBH);
3352 while (next != SCB_LIST_NULL)
3353 {
3354 aic_outb(p, next, SCBPTR);
3355 if (aic_inb(p, SCB_TAG) < p->scb_data->numscbs)
3356 {
3357 printk(WARN_LEAD "Free list inconsistency!.\n", p->host_no, channel,
3358 target, lun);
3359 init_lists = TRUE;
3360 next = SCB_LIST_NULL;
3361 }
3362 else
3363 {
3364 aic_outb(p, SCB_LIST_NULL, SCB_TAG);
3365 aic_outb(p, 0, SCB_CONTROL);
3366 next = aic_inb(p, SCB_NEXT);
3367 }
3368 }
3369 }
3370
3371 /*
3372 * Go through the hardware SCB array looking for commands that
3373 * were active but not on any list.
3374 */
3375 if (init_lists)
3376 {
3377 aic_outb(p, SCB_LIST_NULL, FREE_SCBH);
3378 aic_outb(p, SCB_LIST_NULL, WAITING_SCBH);
3379 aic_outb(p, SCB_LIST_NULL, DISCONNECTED_SCBH);
3380 }
3381 for (i = p->scb_data->maxhscbs - 1; i >= 0; i--)
3382 {
3383 unsigned char scbid;
3384
3385 aic_outb(p, i, SCBPTR);
3386 if (init_lists)
3387 {
3388 aic_outb(p, SCB_LIST_NULL, SCB_TAG);
3389 aic_outb(p, SCB_LIST_NULL, SCB_NEXT);
3390 aic_outb(p, 0, SCB_CONTROL);
3391 aic7xxx_add_curscb_to_free_list(p);
3392 }
3393 else
3394 {
3395 scbid = aic_inb(p, SCB_TAG);
3396 if (scbid < p->scb_data->numscbs)
3397 {
3398 scbp = p->scb_data->scb_array[scbid];
3399 if (aic7xxx_match_scb(p, scbp, target, channel, lun, tag))
3400 {
3401 aic_outb(p, 0, SCB_CONTROL);
3402 aic_outb(p, SCB_LIST_NULL, SCB_TAG);
3403 aic7xxx_add_curscb_to_free_list(p);
3404 }
3405 }
3406 }
3407 }
3408
3409 /*
3410 * Go through the entire SCB array now and look for commands for
3411 * for this target that are stillactive. These are other (most likely
3412 * tagged) commands that were disconnected when the reset occurred.
3413 * Any commands we find here we know this about, it wasn't on any queue,
3414 * it wasn't in the qinfifo, it wasn't in the disconnected or waiting
3415 * lists, so it really must have been a paged out SCB. In that case,
3416 * we shouldn't need to bother with updating any counters, just mark
3417 * the correct flags and go on.
3418 */
3419 for (i = 0; i < p->scb_data->numscbs; i++)
3420 {
3421 scbp = p->scb_data->scb_array[i];
3422 if ((scbp->flags & SCB_ACTIVE) &&
3423 aic7xxx_match_scb(p, scbp, target, channel, lun, tag) &&
3424 !aic7xxx_scb_on_qoutfifo(p, scbp))
3425 {
3426 if (scbp->flags & SCB_WAITINGQ)
3427 {
3428 scbq_remove(&p->waiting_scbs, scbp);
3429 scbq_remove(&AIC_DEV(scbp->cmd)->delayed_scbs, scbp);
3430 AIC_DEV(scbp->cmd)->active_cmds++;
3431 p->activescbs++;
3432 }
3433 scbp->flags |= SCB_RESET | SCB_QUEUED_FOR_DONE;
3434 scbp->flags &= ~(SCB_ACTIVE | SCB_WAITINGQ);
3435 }
3436 }
3437
3438 aic_outb(p, active_scb, SCBPTR);
3439 }
3440
3441
3442 /*+F*************************************************************************
3443 * Function:
3444 * aic7xxx_clear_intstat
3445 *
3446 * Description:
3447 * Clears the interrupt status.
3448 *-F*************************************************************************/
3449 static void
3450 aic7xxx_clear_intstat(struct aic7xxx_host *p)
3451 {
3452 /* Clear any interrupt conditions this may have caused. */
3453 aic_outb(p, CLRSELDO | CLRSELDI | CLRSELINGO, CLRSINT0);
3454 aic_outb(p, CLRSELTIMEO | CLRATNO | CLRSCSIRSTI | CLRBUSFREE | CLRSCSIPERR |
3455 CLRPHASECHG | CLRREQINIT, CLRSINT1);
3456 aic_outb(p, CLRSCSIINT | CLRSEQINT | CLRBRKADRINT | CLRPARERR, CLRINT);
3457 }
3458
3459 /*+F*************************************************************************
3460 * Function:
3461 * aic7xxx_reset_current_bus
3462 *
3463 * Description:
3464 * Reset the current SCSI bus.
3465 *-F*************************************************************************/
3466 static void
3467 aic7xxx_reset_current_bus(struct aic7xxx_host *p)
3468 {
3469
3470 /* Disable reset interrupts. */
3471 aic_outb(p, aic_inb(p, SIMODE1) & ~ENSCSIRST, SIMODE1);
3472
3473 /* Turn off the bus' current operations, after all, we shouldn't have any
3474 * valid commands left to cause a RSELI and SELO once we've tossed the
3475 * bus away with this reset, so we might as well shut down the sequencer
3476 * until the bus is restarted as oppossed to saving the current settings
3477 * and restoring them (which makes no sense to me). */
3478
3479 /* Turn on the bus reset. */
3480 aic_outb(p, aic_inb(p, SCSISEQ) | SCSIRSTO, SCSISEQ);
3481 while ( (aic_inb(p, SCSISEQ) & SCSIRSTO) == 0)
3482 mdelay(5);
3483
3484 /*
3485 * Some of the new Ultra2 chipsets need a longer delay after a chip
3486 * reset than just the init setup creates, so we have to delay here
3487 * before we go into a reset in order to make the chips happy.
3488 */
3489 if (p->features & AHC_ULTRA2)
3490 mdelay(250);
3491 else
3492 mdelay(50);
3493
3494 /* Turn off the bus reset. */
3495 aic_outb(p, 0, SCSISEQ);
3496 mdelay(10);
3497
3498 aic7xxx_clear_intstat(p);
3499 /* Re-enable reset interrupts. */
3500 aic_outb(p, aic_inb(p, SIMODE1) | ENSCSIRST, SIMODE1);
3501
3502 }
3503
3504 /*+F*************************************************************************
3505 * Function:
3506 * aic7xxx_reset_channel
3507 *
3508 * Description:
3509 * Reset the channel.
3510 *-F*************************************************************************/
3511 static void
3512 aic7xxx_reset_channel(struct aic7xxx_host *p, int channel, int initiate_reset)
3513 {
3514 unsigned long offset_min, offset_max;
3515 unsigned char sblkctl;
3516 int cur_channel;
3517
3518 if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
3519 printk(INFO_LEAD "Reset channel called, %s initiate reset.\n",
3520 p->host_no, channel, -1, -1, (initiate_reset==TRUE) ? "will" : "won't" );
3521
3522
3523 if (channel == 1)
3524 {
3525 offset_min = 8;
3526 offset_max = 16;
3527 }
3528 else
3529 {
3530 if (p->features & AHC_TWIN)
3531 {
3532 /* Channel A */
3533 offset_min = 0;
3534 offset_max = 8;
3535 }
3536 else
3537 {
3538 offset_min = 0;
3539 if (p->features & AHC_WIDE)
3540 {
3541 offset_max = 16;
3542 }
3543 else
3544 {
3545 offset_max = 8;
3546 }
3547 }
3548 }
3549
3550 while (offset_min < offset_max)
3551 {
3552 /*
3553 * Revert to async/narrow transfers until we renegotiate.
3554 */
3555 aic_outb(p, 0, TARG_SCSIRATE + offset_min);
3556 if (p->features & AHC_ULTRA2)
3557 {
3558 aic_outb(p, 0, TARG_OFFSET + offset_min);
3559 }
3560 offset_min++;
3561 }
3562
3563 /*
3564 * Reset the bus and unpause/restart the controller
3565 */
3566 sblkctl = aic_inb(p, SBLKCTL);
3567 if ( (p->chip & AHC_CHIPID_MASK) == AHC_AIC7770 )
3568 cur_channel = (sblkctl & SELBUSB) >> 3;
3569 else
3570 cur_channel = 0;
3571 if ( (cur_channel != channel) && (p->features & AHC_TWIN) )
3572 {
3573 /*
3574 * Case 1: Command for another bus is active
3575 */
3576 if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
3577 printk(INFO_LEAD "Stealthily resetting idle channel.\n", p->host_no,
3578 channel, -1, -1);
3579 /*
3580 * Stealthily reset the other bus without upsetting the current bus.
3581 */
3582 aic_outb(p, sblkctl ^ SELBUSB, SBLKCTL);
3583 aic_outb(p, aic_inb(p, SIMODE1) & ~ENBUSFREE, SIMODE1);
3584 if (initiate_reset)
3585 {
3586 aic7xxx_reset_current_bus(p);
3587 }
3588 aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP), SCSISEQ);
3589 aic7xxx_clear_intstat(p);
3590 aic_outb(p, sblkctl, SBLKCTL);
3591 }
3592 else
3593 {
3594 /*
3595 * Case 2: A command from this bus is active or we're idle.
3596 */
3597 if (aic7xxx_verbose & VERBOSE_RESET_PROCESS)
3598 printk(INFO_LEAD "Resetting currently active channel.\n", p->host_no,
3599 channel, -1, -1);
3600 aic_outb(p, aic_inb(p, SIMODE1) & ~(ENBUSFREE|ENREQINIT),
3601 SIMODE1);
3602 p->flags &= ~AHC_HANDLING_REQINITS;
3603 p->msg_type = MSG_TYPE_NONE;
3604 p->msg_len = 0;
3605 if (initiate_reset)
3606 {
3607 aic7xxx_reset_current_bus(p);
3608 }
3609 aic_outb(p, aic_inb(p, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP), SCSISEQ);
3610 aic7xxx_clear_intstat(p);
3611 }
3612 if (aic7xxx_verbose & VERBOSE_RESET_RETURN)
3613 printk(INFO_LEAD "Channel reset\n", p->host_no, channel, -1, -1);
3614 /*
3615 * Clean up all the state information for the pending transactions
3616 * on this bus.
3617 */
3618 aic7xxx_reset_device(p, ALL_TARGETS, channel, ALL_LUNS, SCB_LIST_NULL);
3619
3620 if ( !(p->features & AHC_TWIN) )
3621 {
3622 restart_sequencer(p);
3623 }
3624
3625 return;
3626 }
3627
3628 /*+F*************************************************************************
3629 * Function:
3630 * aic7xxx_run_waiting_queues
3631 *
3632 * Description:
3633 * Scan the awaiting_scbs queue downloading and starting as many
3634 * scbs as we can.
3635 *-F*************************************************************************/
3636 static void
3637 aic7xxx_run_waiting_queues(struct aic7xxx_host *p)
3638 {
3639 struct aic7xxx_scb *scb;
3640 struct aic_dev_data *aic_dev;
3641 int sent;
3642
3643
3644 if (p->waiting_scbs.head == NULL)
3645 return;
3646
3647 sent = 0;
3648
3649 /*
3650 * First handle SCBs that are waiting but have been assigned a slot.
3651 */
3652 while ((scb = scbq_remove_head(&p->waiting_scbs)) != NULL)
3653 {
3654 aic_dev = scb->cmd->device->hostdata;
3655 if ( !scb->tag_action )
3656 {
3657 aic_dev->temp_q_depth = 1;
3658 }
3659 if ( aic_dev->active_cmds >= aic_dev->temp_q_depth)
3660 {
3661 scbq_insert_tail(&aic_dev->delayed_scbs, scb);
3662 }
3663 else
3664 {
3665 scb->flags &= ~SCB_WAITINGQ;
3666 aic_dev->active_cmds++;
3667 p->activescbs++;
3668 if ( !(scb->tag_action) )
3669 {
3670 aic7xxx_busy_target(p, scb);
3671 }
3672 p->qinfifo[p->qinfifonext++] = scb->hscb->tag;
3673 sent++;
3674 }
3675 }
3676 if (sent)
3677 {
3678 if (p->features & AHC_QUEUE_REGS)
3679 aic_outb(p, p->qinfifonext, HNSCB_QOFF);
3680 else
3681 {
3682 pause_sequencer(p);
3683 aic_outb(p, p->qinfifonext, KERNEL_QINPOS);
3684 unpause_sequencer(p, FALSE);
3685 }
3686 if (p->activescbs > p->max_activescbs)
3687 p->max_activescbs = p->activescbs;
3688 }
3689 }
3690
3691 #ifdef CONFIG_PCI
3692
3693 #define DPE 0x80
3694 #define SSE 0x40
3695 #define RMA 0x20
3696 #define RTA 0x10
3697 #define STA 0x08
3698 #define DPR 0x01
3699
3700 /*+F*************************************************************************
3701 * Function:
3702 * aic7xxx_pci_intr
3703 *
3704 * Description:
3705 * Check the scsi card for PCI errors and clear the interrupt
3706 *
3707 * NOTE: If you don't have this function and a 2940 card encounters
3708 * a PCI error condition, the machine will end up locked as the
3709 * interrupt handler gets slammed with non-stop PCI error interrupts
3710 *-F*************************************************************************/
3711 static void
3712 aic7xxx_pci_intr(struct aic7xxx_host *p)
3713 {
3714 unsigned char status1;
3715
3716 pci_read_config_byte(p->pdev, PCI_STATUS + 1, &status1);
3717
3718 if ( (status1 & DPE) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
3719 printk(WARN_LEAD "Data Parity Error during PCI address or PCI write"
3720 "phase.\n", p->host_no, -1, -1, -1);
3721 if ( (status1 & SSE) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
3722 printk(WARN_LEAD "Signal System Error Detected\n", p->host_no,
3723 -1, -1, -1);
3724 if ( (status1 & RMA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
3725 printk(WARN_LEAD "Received a PCI Master Abort\n", p->host_no,
3726 -1, -1, -1);
3727 if ( (status1 & RTA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
3728 printk(WARN_LEAD "Received a PCI Target Abort\n", p->host_no,
3729 -1, -1, -1);
3730 if ( (status1 & STA) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
3731 printk(WARN_LEAD "Signaled a PCI Target Abort\n", p->host_no,
3732 -1, -1, -1);
3733 if ( (status1 & DPR) && (aic7xxx_verbose & VERBOSE_MINOR_ERROR) )
3734 printk(WARN_LEAD "Data Parity Error has been reported via PCI pin "
3735 "PERR#\n", p->host_no, -1, -1, -1);
3736
3737 pci_write_config_byte(p->pdev, PCI_STATUS + 1, status1);
3738 if (status1 & (DPR|RMA|RTA))
3739 aic_outb(p, CLRPARERR, CLRINT);
3740
3741 if ( (aic7xxx_panic_on_abort) && (p->spurious_int > 500) )
3742 aic7xxx_panic_abort(p, NULL);
3743
3744 }
3745 #endif /* CONFIG_PCI */
3746
3747 /*+F*************************************************************************
3748 * Function:
3749 * aic7xxx_construct_ppr
3750 *
3751 * Description:
3752 * Build up a Parallel Protocol Request message for use with SCSI-3
3753 * devices.
3754 *-F*************************************************************************/
3755 static void
3756 aic7xxx_construct_ppr(struct aic7xxx_host *p, struct aic7xxx_scb *scb)
3757 {
3758 p->msg_buf[p->msg_index++] = MSG_EXTENDED;
3759 p->msg_buf[p->msg_index++] = MSG_EXT_PPR_LEN;
3760 p->msg_buf[p->msg_index++] = MSG_EXT_PPR;
3761 p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.period;
3762 p->msg_buf[p->msg_index++] = 0;
3763 p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.offset;
3764 p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.width;
3765 p->msg_buf[p->msg_index++] = AIC_DEV(scb->cmd)->goal.options;
3766 p->msg_len += 8;
3767 }
3768
3769 /*+F*************************************************************************
3770 * Function:
3771 * aic7xxx_construct_sdtr
3772 *
3773 * Description:
3774 * Constucts a synchronous data transfer message in the message
3775 * buffer on the sequencer.
3776 *-F*************************************************************************/
3777 static void
3778 aic7xxx_construct_sdtr(struct aic7xxx_host *p, unsigned char period,
3779 unsigned char offset)
3780 {
3781 p->msg_buf[p->msg_index++] = MSG_EXTENDED;
3782 p->msg_buf[p->msg_index++] = MSG_EXT_SDTR_LEN;
3783 p->msg_buf[p->msg_index++] = MSG_EXT_SDTR;
3784 p->msg_buf[p->msg_index++] = period;
3785 p->msg_buf[p->msg_index++] = offset;
3786 p->msg_len += 5;
3787 }
3788
3789 /*+F*************************************************************************
3790 * Function:
3791 * aic7xxx_construct_wdtr
3792 *
3793 * Description:
3794 * Constucts a wide data transfer message in the message buffer
3795 * on the sequencer.
3796 *-F*************************************************************************/
3797 static void
3798 aic7xxx_construct_wdtr(struct aic7xxx_host *p, unsigned char bus_width)
3799 {
3800 p->msg_buf[p->msg_index++] = MSG_EXTENDED;
3801 p->msg_buf[p->msg_index++] = MSG_EXT_WDTR_LEN;
3802 p->msg_buf[p->msg_index++] = MSG_EXT_WDTR;
3803 p->msg_buf[p->msg_index++] = bus_width;
3804 p->msg_len += 4;
3805 }
3806