| blob | 8d041639b000dfce379fa701d7249d2554114314 |
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 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*************************************************************************/
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 accomodate 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*************************************************************************/
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 */
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 */
202 #define AIC7XXX_STRICT_PCI_SETUP
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 */
218 /*
219 * #define AIC7XXX_VERBOSE_DEBUGGING
220 */
222 #if defined(MODULE) || defined(PCMCIA)
223 #include <linux/module.h>
224 #endif
226 #if defined(PCMCIA)
227 # undef MODULE
228 #endif
230 #include <stdarg.h>
231 #include <asm/io.h>
232 #include <asm/irq.h>
233 #include <asm/byteorder.h>
234 #include <linux/version.h>
235 #include <linux/string.h>
236 #include <linux/errno.h>
237 #include <linux/kernel.h>
238 #include <linux/ioport.h>
239 #include <linux/delay.h>
240 #include <linux/sched.h>
241 #include <linux/pci.h>
242 #include <linux/proc_fs.h>
243 #include <linux/blk.h>
244 #include <linux/tqueue.h>
245 #include <linux/init.h>
254 #include <scsi/scsicam.h>
256 #include <linux/stat.h>
261 /*
262 * To generate the correct addresses for the controller to issue
263 * on the bus. Originally added for DEC Alpha support.
264 */
265 #define VIRT_TO_BUS(a) (unsigned int)virt_to_bus((void *)(a))
269 #define NUMBER(arr) (sizeof(arr) / sizeof(arr[0]))
270 #define MIN(a,b) (((a) < (b)) ? (a) : (b))
271 #define MAX(a,b) (((a) > (b)) ? (a) : (b))
272 #define ALL_TARGETS -1
273 #define ALL_CHANNELS -1
274 #define ALL_LUNS -1
275 #define MAX_TARGETS 16
276 #define MAX_LUNS 8
277 #ifndef TRUE
278 # define TRUE 1
279 #endif
280 #ifndef FALSE
281 # define FALSE 0
282 #endif
284 /*
285 * We need the bios32.h file if we are kernel version 2.1.92 or less. The
286 * full set of pci_* changes wasn't in place until 2.1.93
287 */
289 #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,1,92)
290 # if defined(__sparc_v9__) || defined(__powerpc__)
292 # endif
293 # include <linux/bios32.h>
294 #endif
296 #if defined(__powerpc__)
297 # define MMAPIO
298 # ifdef mb
299 # undef mb
300 # endif
301 # define mb() \
303 #elif defined(__i386__)
304 # define MMAPIO
305 # ifdef mb
306 # undef mb
307 # endif
308 # define mb() \
310 #elif defined(__alpha__)
311 # ifdef mb
312 # undef mb
313 # endif
314 # define mb() \
316 #endif
318 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,0)
319 # include <linux/spinlock.h>
320 # include <linux/smp.h>
321 # define cpuid smp_processor_id()
322 # if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
323 # define DRIVER_LOCK_INIT \
324 spin_lock_init(&p->spin_lock);
325 # define DRIVER_LOCK \
326 if(!p->cpu_lock_count[cpuid]) { \
327 spin_lock_irqsave(&p->spin_lock, cpu_flags); \
328 p->cpu_lock_count[cpuid]++; \
329 } else { \
330 p->cpu_lock_count[cpuid]++; \
331 }
332 # define DRIVER_UNLOCK \
333 if(--p->cpu_lock_count[cpuid] == 0) \
334 spin_unlock_irqrestore(&p->spin_lock, cpu_flags);
335 # else
336 # define DRIVER_LOCK_INIT
337 # define DRIVER_LOCK
338 # define DRIVER_UNLOCK
339 # endif
340 #else
341 # define cpuid 0
342 # define DRIVER_LOCK_INIT
343 # define DRIVER_LOCK \
344 save_flags(cpu_flags); \
345 cli();
346 # define DRIVER_UNLOCK \
347 restore_flags(cpu_flags);
348 # define le32_to_cpu(x) (x)
349 # define cpu_to_le32(x) (x)
350 #endif
352 /*
353 * You can try raising me if tagged queueing is enabled, or lowering
354 * me if you only have 4 SCBs.
355 */
356 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
357 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
358 #else
359 #define AIC7XXX_CMDS_PER_DEVICE 8
360 #endif
362 /* Set this to the delay in seconds after SCSI bus reset. */
363 #ifdef CONFIG_AIC7XXX_RESET_DELAY
364 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY
365 #else
366 #define AIC7XXX_RESET_DELAY 5
367 #endif
369 /*
370 * Control collection of SCSI transfer statistics for the /proc filesystem.
371 *
372 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
373 * NOTE: This does affect performance since it has to maintain statistics.
374 */
375 #ifdef CONFIG_AIC7XXX_PROC_STATS
376 #define AIC7XXX_PROC_STATS
377 #endif
379 /*
380 * NOTE: Uncommenting the define below no longer has any effect, the
381 * tagged queue value array is always active now. I've added
382 * a setup option to set this particular array and I'm hoping
383 * insmod will be smart enough to set it properly as well. It's
384 * by use of this array that a person can enable tagged queueing.
385 * The DEFAULT_TAG_COMMANDS define has been changed to disable
386 * tagged queueing by default, so if your devices can handle tagged
387 * queueing you will need to add a line to their lilo.conf file like:
388 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
389 * which will result in the first four devices on the first two
390 * controllers being set to a tagged queue depth of 32.
391 *
392 * Set this for defining the number of tagged commands on a device
393 * by device, and controller by controller basis. The first set
394 * of tagged commands will be used for the first detected aic7xxx
395 * controller, the second set will be used for the second detected
396 * aic7xxx controller, and so on. These values will *only* be used
397 * for targets that are tagged queueing capable; these values will
398 * be ignored in all other cases. The tag_commands is an array of
399 * 16 to allow for wide and twin adapters. Twin adapters will use
400 * indexes 0-7 for channel 0, and indexes 8-15 for channel 1.
401 *
402 * *** Determining commands per LUN ***
403 *
404 * When AIC7XXX_CMDS_PER_DEVICE is not defined, the driver will use its
405 * own algorithm to determine the commands/LUN. If SCB paging is
406 * enabled, which is always now, the default is 8 commands per lun
407 * that indicates it supports tagged queueing. All non-tagged devices
408 * use an internal queue depth of 3, with no more than one of those
409 * three commands active at one time.
410 */
411 /* #define AIC7XXX_TAGGED_QUEUEING_BY_DEVICE */
414 {
418 /*
419 * Make a define that will tell the driver not to use tagged queueing
420 * by default.
421 */
422 #ifdef CONFIG_AIC7XXX_TCQ_ON_BY_DEFAULT
423 #define DEFAULT_TAG_COMMANDS {0, 0, 0, 0, 0, 0, 0, 0,\
424 0, 0, 0, 0, 0, 0, 0, 0}
425 #else
426 #define DEFAULT_TAG_COMMANDS {255, 255, 255, 255, 255, 255, 255, 255,\
427 255, 255, 255, 255, 255, 255, 255, 255}
428 #endif
430 /*
431 * Modify this as you see fit for your system. By setting tag_commands
432 * to 0, the driver will use it's own algorithm for determining the
433 * number of commands to use (see above). When 255, the driver will
434 * not enable tagged queueing for that particular device. When positive
435 * (> 0) and (< 255) the values in the array are used for the queue_depth.
436 * Note that the maximum value for an entry is 254, but you're insane if
437 * you try to use that many commands on one device.
438 *
439 * In this example, the first line will disable tagged queueing for all
440 * the devices on the first probed aic7xxx adapter.
441 *
442 * The second line enables tagged queueing with 4 commands/LUN for IDs
443 * (1, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
444 * driver to use its own algorithm for ID 1.
445 *
446 * The third line is the same as the first line.
447 *
448 * The fourth line disables tagged queueing for devices 0 and 3. It
449 * enables tagged queueing for the other IDs, with 16 commands/LUN
450 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
451 * IDs 2, 5-7, and 9-15.
452 */
454 /*
455 * NOTE: The below structure is for reference only, the actual structure
456 * to modify in order to change things is located around line
457 * number 1305
458 adapter_tag_info_t aic7xxx_tag_info[] =
459 {
460 {DEFAULT_TAG_COMMANDS},
461 {{4, 0, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 255, 4, 4, 4}},
462 {DEFAULT_TAG_COMMANDS},
463 {{255, 16, 4, 255, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
464 };
465 */
468 {
485 };
488 /*
489 * Define an array of board names that can be indexed by aha_type.
490 * Don't forget to change this when changing the types!
491 */
522 };
524 /*
525 * There should be a specific return value for this in scsi.h, but
526 * it seems that most drivers ignore it.
527 */
528 #define DID_UNDERFLOW DID_ERROR
530 /*
531 * What we want to do is have the higher level scsi driver requeue
532 * the command to us. There is no specific driver status for this
533 * condition, but the higher level scsi driver will requeue the
534 * command on a DID_BUS_BUSY error.
535 *
536 * Upon further inspection and testing, it seems that DID_BUS_BUSY
537 * will *always* retry the command. We can get into an infinite loop
538 * if this happens when we really want some sort of counter that
539 * will automatically abort/reset the command after so many retries.
540 * Using DID_ERROR will do just that. (Made by a suggestion by
541 * Doug Ledford 8/1/96)
542 */
543 #define DID_RETRY_COMMAND DID_ERROR
545 #define HSCSIID 0x07
546 #define SCSI_RESET 0x040
548 /*
549 * EISA/VL-bus stuff
550 */
551 #define MINSLOT 1
552 #define MAXSLOT 15
553 #define SLOTBASE(x) ((x) << 12)
554 #define BASE_TO_SLOT(x) ((x) >> 12)
556 /*
557 * Standard EISA Host ID regs (Offset from slot base)
558 */
564 /*
565 * AIC-7770 I/O range to reserve for a card
566 */
567 #define MINREG 0xC00
568 #define MAXREG 0xCBF
572 /*
573 * AIC-78X0 PCI registers
574 */
575 #define CLASS_PROGIF_REVID 0x08
576 #define DEVREVID 0x000000FFul
577 #define PROGINFC 0x0000FF00ul
578 #define SUBCLASS 0x00FF0000ul
579 #define BASECLASS 0xFF000000ul
581 #define CSIZE_LATTIME 0x0C
583 #define LATTIME 0x0000FF00ul
585 #define DEVCONFIG 0x40
589 #define RAMPSM_ULTRA2 0x00000004
590 #define VOLSENSE 0x00000100ul
591 #define SCBRAMSEL 0x00000080ul
592 #define SCBRAMSEL_ULTRA2 0x00000008
593 #define MRDCEN 0x00000040ul
596 #define BERREN 0x00000008ul
597 #define DACEN 0x00000004ul
598 #define STPWLEVEL 0x00000002ul
604 /*
605 * Define the different types of SEEPROMs on aic7xxx adapters
606 * and make it also represent the address size used in accessing
607 * its registers. The 93C46 chips have 1024 bits organized into
608 * 64 16-bit words, while the 93C56 chips have 2048 bits organized
609 * into 128 16-bit words. The C46 chips use 6 bits to address
610 * each word, while the C56 and C66 (4096 bits) use 8 bits to
611 * address each word.
612 */
615 /*
616 *
617 * Define the format of the SEEPROM registers (16 bits).
618 *
619 */
622 /*
623 * SCSI ID Configuration Flags
624 */
637 /* UNUSED 0x3000 */
640 /*
641 * BIOS Control Bits
642 */
646 /* UNUSED 0x0008 */
649 /* UNUSED 0x0040 */
651 /* UNUSED 0xFF00 */
654 /*
655 * Host Adapter Control Bits
656 */
669 /* UNUSED 0xF280 */
672 /*
673 * Bus Release, Host Adapter ID
674 */
676 /* UNUSED 0x00F0 */
680 /*
681 * Maximum targets
682 */
684 /* UNUSED 0xFF00 */
689 };
691 #define SELBUS_MASK 0x0a
692 #define SELNARROW 0x00
693 #define SELBUSB 0x08
694 #define SINGLE_BUS 0x00
696 #define SCB_TARGET(scb) \
697 (((scb)->hscb->target_channel_lun & TID) >> 4)
698 #define SCB_LUN(scb) \
699 ((scb)->hscb->target_channel_lun & LID)
700 #define SCB_IS_SCSIBUS_B(scb) \
701 (((scb)->hscb->target_channel_lun & SELBUSB) != 0)
703 /*
704 * If an error occurs during a data transfer phase, run the command
705 * to completion - it's easier that way - making a note of the error
706 * condition in this location. This then will modify a DID_OK status
707 * into an appropriate error for the higher-level SCSI code.
708 */
709 #define aic7xxx_error(cmd) ((cmd)->SCp.Status)
711 /*
712 * Keep track of the targets returned status.
713 */
714 #define aic7xxx_status(cmd) ((cmd)->SCp.sent_command)
716 /*
717 * The position of the SCSI commands scb within the scb array.
718 */
719 #define aic7xxx_position(cmd) ((cmd)->SCp.have_data_in)
721 /*
722 * The stored DMA mapping for single-buffer data transfers.
723 */
724 #define aic7xxx_mapping(cmd) ((cmd)->SCp.phase)
726 /*
727 * So we can keep track of our host structs
728 */
731 /*
732 * As of Linux 2.1, the mid-level SCSI code uses virtual addresses
733 * in the scatter-gather lists. We need to convert the virtual
734 * addresses to physical addresses.
735 */
739 };
741 /*
742 * Maximum number of SG segments these cards can support.
743 */
744 #define AIC7XXX_MAX_SG 128
746 /*
747 * The maximum number of SCBs we could have for ANY type
748 * of card. DON'T FORGET TO CHANGE THE SCB MASK IN THE
749 * SEQUENCER CODE IF THIS IS MODIFIED!
750 */
751 #define AIC7XXX_MAXSCB 255
755 /* ------------ Begin hardware supported fields ---------------- */
768 * Also used as the tag for tagged I/O
769 */
771 * via PIO to initialize a transaction.
772 */
774 * or disconnected down in the sequencer.
775 */
778 * Unused by the kernel, but we require
779 * the padding so that the array of
780 * hardware SCBs is alligned on 32 byte
781 * boundaries so the sequencer can index
782 */
783 };
799 SCB_MSGOUT_SENT |
800 SCB_MSGOUT_SDTR |
801 SCB_MSGOUT_WDTR,
824 /*
825 * Here ends the FreeBSD defined flags and here begins the linux defined
826 * flags. NOTE: I did not preserve the old flag name during this change
827 * specifically to force me to evaluate what flags were being used properly
828 * and what flags weren't. This way, I could clean up the flag usage on
829 * a use by use basis. Doug Ledford
830 */
841 #define AHC_IN_ISR_BIT 28
892 #define SCB_DMA_ADDR(scb, addr) ((unsigned long)(addr) + (scb)->scb_dma->dma_offset)
896 * to virtual address to get
897 * dma handle in this region */
899 * for unmap */
901 };
912 * Allocate 6 characters for
913 * sense command.
914 */
917 * don't have to calculate anything
918 * during underflow/overflow/stat code
919 */
922 };
924 /*
925 * Define a linked list of SCBs.
926 */
944 };
946 static unsigned char
951 * SCBs assigned to free slot on
952 * card (no paging required)
953 */
967 };
969 #define AHC_TRANS_CUR 0x0001
970 #define AHC_TRANS_ACTIVE 0x0002
971 #define AHC_TRANS_GOAL 0x0004
972 #define AHC_TRANS_USER 0x0008
973 #define AHC_TRANS_QUITE 0x0010
989 /*
990 * Define a structure used for each host adapter. Note, in order to avoid
991 * problems with architectures I can't test on (because I don't have one,
992 * such as the Alpha based systems) which happen to give faults for
993 * non-aligned memory accesses, care was taken to align this structure
994 * in a way that gauranteed all accesses larger than 8 bits were aligned
995 * on the appropriate boundary. It's also organized to try and be more
996 * cache line efficient. Be careful when changing this lest you might hurt
997 * overall performance and bring down the wrath of the masses.
998 */
1000 /*
1001 * This is the first 64 bytes in the host struct
1002 */
1004 /*
1005 * We are grouping things here....first, items that get either read or
1006 * written with nearly every interrupt
1007 */
1025 /*
1026 * Things read/written on nearly every entry into aic7xxx_queue()
1027 */
1042 #define DEVICE_PRESENT 0x01
1043 #define BUS_DEVICE_RESET_PENDING 0x02
1044 #define DEVICE_RESET_DELAY 0x04
1045 #define DEVICE_PRINT_DTR 0x08
1046 #define DEVICE_PARITY_ERROR 0x10
1047 #define DEVICE_WAS_BUSY 0x20
1048 #define DEVICE_SCSI_3 0x40
1049 #define DEVICE_SCANNED 0x80
1059 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,0)
1060 spinlock_t spin_lock;
1062 #endif
1078 #define MSG_TYPE_NONE 0x00
1079 #define MSG_TYPE_INITIATOR_MSGOUT 0x01
1080 #define MSG_TYPE_INITIATOR_MSGIN 0x02
1086 /*
1087 * We put the less frequently used host structure items after the more
1088 * frequently used items to try and ease the burden on the cache subsystem.
1089 * These entries are not *commonly* accessed, whereas the preceding entries
1090 * are accessed very often.
1091 */
1118 /*
1119 * Statistics Kept:
1120 *
1121 * Total Xfers (count for each command that has a data xfer),
1122 * broken down further by reads && writes.
1123 *
1124 * Binned sizes, writes && reads:
1125 * < 512, 512, 1-2K, 2-4K, 4-8K, 8-16K, 16-32K, 32-64K, 64K-128K, > 128K
1126 *
1127 * Total amounts read/written above 512 bytes (amts under ignored)
1128 *
1129 * NOTE: Enabling this feature is likely to cause a noticeable performance
1130 * decrease as the accesses into the stats structures blows apart multiple
1131 * cache lines and is CPU time consuming.
1132 *
1133 * NOTE: Since it doesn't really buy us much, but consumes *tons* of RAM
1134 * and blows apart all sorts of cache lines, I modified this so that we
1135 * no longer look at the LUN. All LUNs now go into the same bin on each
1136 * device for stats purposes.
1137 */
1141 #ifdef AIC7XXX_PROC_STATS
1147 #if 0
1150 #endif
1152 };
1154 /*
1155 * Valid SCSIRATE values. (p. 3-17)
1156 * Provides a mapping of transfer periods in ns/4 to the proper value to
1157 * stick in the SCSIRATE reg to use that transfer rate.
1158 */
1159 #define AHC_SYNCRATE_ULTRA3 0
1160 #define AHC_SYNCRATE_ULTRA2 1
1161 #define AHC_SYNCRATE_ULTRA 3
1162 #define AHC_SYNCRATE_FAST 6
1163 #define AHC_SYNCRATE_CRC 0x40
1164 #define AHC_SYNCRATE_SE 0x10
1166 /* Rates in Ultra mode have bit 8 of sxfr set */
1167 #define ULTRA_SXFR 0x100
1188 };
1190 #define CTL_OF_SCB(scb) (((scb->hscb)->target_channel_lun >> 3) & 0x1), \
1191 (((scb->hscb)->target_channel_lun >> 4) & 0xf), \
1192 ((scb->hscb)->target_channel_lun & 0x07)
1194 #define CTL_OF_CMD(cmd) ((cmd->channel) & 0x01), \
1195 ((cmd->target) & 0x0f), \
1196 ((cmd->lun) & 0x07)
1198 #define TARGET_INDEX(cmd) ((cmd)->target | ((cmd)->channel << 3))
1200 /*
1201 * A nice little define to make doing our printks a little easier
1202 */
1207 /*
1208 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
1209 * cards in the system. This should be fixed. Exceptions to this
1210 * rule are noted in the comments.
1211 */
1214 /*
1215 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
1216 * has no effect on any later resets that might occur due to things like
1217 * SCSI bus timeouts.
1218 */
1220 /*
1221 * Certain PCI motherboards will scan PCI devices from highest to lowest,
1222 * others scan from lowest to highest, and they tend to do all kinds of
1223 * strange things when they come into contact with PCI bridge chips. The
1224 * net result of all this is that the PCI card that is actually used to boot
1225 * the machine is very hard to detect. Most motherboards go from lowest
1226 * PCI slot number to highest, and the first SCSI controller found is the
1227 * one you boot from. The only exceptions to this are when a controller
1228 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
1229 * from lowest PCI slot number to highest PCI slot number. We also force
1230 * all controllers with their BIOS disabled to the end of the list. This
1231 * works on *almost* all computers. Where it doesn't work, we have this
1232 * option. Setting this option to non-0 will reverse the order of the sort
1233 * to highest first, then lowest, but will still leave cards with their BIOS
1234 * disabled at the very end. That should fix everyone up unless there are
1235 * really strange cirumstances.
1236 */
1238 /*
1239 * Should we force EXTENDED translation on a controller.
1240 * 0 == Use whatever is in the SEEPROM or default to off
1241 * 1 == Use whatever is in the SEEPROM or default to on
1242 */
1244 /*
1245 * The IRQ trigger method used on EISA controllers. Does not effect PCI cards.
1246 * -1 = Use detected settings.
1247 * 0 = Force Edge triggered mode.
1248 * 1 = Force Level triggered mode.
1249 */
1251 /*
1252 * This variable is used to override the termination settings on a controller.
1253 * This should not be used under normal conditions. However, in the case
1254 * that a controller does not have a readable SEEPROM (so that we can't
1255 * read the SEEPROM settings directly) and that a controller has a buggered
1256 * version of the cable detection logic, this can be used to force the
1257 * correct termination. It is preferable to use the manual termination
1258 * settings in the BIOS if possible, but some motherboard controllers store
1259 * those settings in a format we can't read. In other cases, auto term
1260 * should also work, but the chipset was put together with no auto term
1261 * logic (common on motherboard controllers). In those cases, we have
1262 * 32 bits here to work with. That's good for 8 controllers/channels. The
1263 * bits are organized as 4 bits per channel, with scsi0 getting the lowest
1264 * 4 bits in the int. A 1 in a bit position indicates the termination setting
1265 * that corresponds to that bit should be enabled, a 0 is disabled.
1266 * It looks something like this:
1267 *
1268 * 0x0f = 1111-Single Ended Low Byte Termination on/off
1269 * ||\-Single Ended High Byte Termination on/off
1270 * |\-LVD Low Byte Termination on/off
1271 * \-LVD High Byte Termination on/off
1272 *
1273 * For non-Ultra2 controllers, the upper 2 bits are not important. So, to
1274 * enable both high byte and low byte termination on scsi0, I would need to
1275 * make sure that the override_term variable was set to 0x03 (bits 0011).
1276 * To make sure that all termination is enabled on an Ultra2 controller at
1277 * scsi2 and only high byte termination on scsi1 and high and low byte
1278 * termination on scsi0, I would set override_term=0xf23 (bits 1111 0010 0011)
1279 *
1280 * For the most part, users should never have to use this, that's why I
1281 * left it fairly cryptic instead of easy to understand. If you need it,
1282 * most likely someone will be telling you what your's needs to be set to.
1283 */
1285 /*
1286 * Certain motherboard chipset controllers tend to screw
1287 * up the polarity of the term enable output pin. Use this variable
1288 * to force the correct polarity for your system. This is a bitfield variable
1289 * similar to the previous one, but this one has one bit per channel instead
1290 * of four.
1291 * 0 = Force the setting to active low.
1292 * 1 = Force setting to active high.
1293 * Most Adaptec cards are active high, several motherboards are active low.
1294 * To force a 2940 card at SCSI 0 to active high and a motherboard 7895
1295 * controller at scsi1 and scsi2 to active low, and a 2910 card at scsi3
1296 * to active high, you would need to set stpwlev=0x9 (bits 1001).
1297 *
1298 * People shouldn't need to use this, but if you are experiencing lots of
1299 * SCSI timeout problems, this may help. There is one sure way to test what
1300 * this option needs to be. Using a boot floppy to boot the system, configure
1301 * your system to enable all SCSI termination (in the Adaptec SCSI BIOS) and
1302 * if needed then also pass a value to override_term to make sure that the
1303 * driver is enabling SCSI termination, then set this variable to either 0
1304 * or 1. When the driver boots, make sure there are *NO* SCSI cables
1305 * connected to your controller. If it finds and inits the controller
1306 * without problem, then the setting you passed to stpwlev was correct. If
1307 * the driver goes into a reset loop and hangs the system, then you need the
1308 * other setting for this variable. If neither setting lets the machine
1309 * boot then you have definite termination problems that may not be fixable.
1310 */
1312 /*
1313 * Set this to non-0 in order to force the driver to panic the kernel
1314 * and print out debugging info on a SCSI abort or reset cycle.
1315 */
1317 /*
1318 * PCI bus parity checking of the Adaptec controllers. This is somewhat
1319 * dubious at best. To my knowledge, this option has never actually
1320 * solved a PCI parity problem, but on certain machines with broken PCI
1321 * chipset configurations, it can generate tons of false error messages.
1322 * It's included in the driver for completeness.
1323 * 0 = Shut off PCI parity check
1324 * -1 = Normal polarity pci parity checking
1325 * 1 = reverse polarity pci parity checking
1326 *
1327 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
1328 * variable to -1 you would actually want to simply pass the variable
1329 * name without a number. That will invert the 0 which will result in
1330 * -1.
1331 */
1333 /*
1334 * Set this to any non-0 value to cause us to dump the contents of all
1335 * the card's registers in a hex dump format tailored to each model of
1336 * controller.
1337 *
1338 * NOTE: THE CONTROLLER IS LEFT IN AN UNUSEABLE STATE BY THIS OPTION.
1339 * YOU CANNOT BOOT UP WITH THIS OPTION, IT IS FOR DEBUGGING PURPOSES
1340 * ONLY
1341 */
1343 /*
1344 * Set this to a non-0 value to make us dump out the 32 bit instruction
1345 * registers on the card after completing the sequencer download. This
1346 * allows the actual sequencer download to be verified. It is possible
1347 * to use this option and still boot up and run your system. This is
1348 * only intended for debugging purposes.
1349 */
1351 /*
1352 * Certain newer motherboards have put new PCI based devices into the
1353 * IO spaces that used to typically be occupied by VLB or EISA cards.
1354 * This overlap can cause these newer motherboards to lock up when scanned
1355 * for older EISA and VLB devices. Setting this option to non-0 will
1356 * cause the driver to skip scanning for any VLB or EISA controllers and
1357 * only support the PCI controllers. NOTE: this means that if the kernel
1358 * os compiled with PCI support disabled, then setting this to non-0
1359 * would result in never finding any devices :)
1360 */
1362 /*
1363 * On some machines, enabling the external SCB RAM isn't reliable yet. I
1364 * haven't had time to make test patches for things like changing the
1365 * timing mode on that external RAM either. Some of those changes may
1366 * fix the problem. Until then though, we default to external SCB RAM
1367 * off and give a command line option to enable it.
1368 */
1370 /*
1371 * So that we can set how long each device is given as a selection timeout.
1372 * The table of values goes like this:
1373 * 0 - 256ms
1374 * 1 - 128ms
1375 * 2 - 64ms
1376 * 3 - 32ms
1377 * We default to 64ms because it's fast. Some old SCSI-I devices need a
1378 * longer time. The final value has to be left shifted by 3, hence 0x10
1379 * is the final value.
1380 */
1382 /*
1383 * So that insmod can find the variable and make it point to something
1384 */
1385 #ifdef MODULE
1387 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,18)
1389 #endif
1391 /*
1392 * Just in case someone uses commas to separate items on the insmod
1393 * command line, we define a dummy buffer here to avoid having insmod
1394 * write wild stuff into our code segment
1395 */
1398 #endif
1400 #define VERBOSE_NORMAL 0x0000
1401 #define VERBOSE_NEGOTIATION 0x0001
1402 #define VERBOSE_SEQINT 0x0002
1403 #define VERBOSE_SCSIINT 0x0004
1404 #define VERBOSE_PROBE 0x0008
1405 #define VERBOSE_PROBE2 0x0010
1406 #define VERBOSE_NEGOTIATION2 0x0020
1407 #define VERBOSE_MINOR_ERROR 0x0040
1408 #define VERBOSE_TRACING 0x0080
1409 #define VERBOSE_ABORT 0x0f00
1410 #define VERBOSE_ABORT_MID 0x0100
1411 #define VERBOSE_ABORT_FIND 0x0200
1412 #define VERBOSE_ABORT_PROCESS 0x0400
1413 #define VERBOSE_ABORT_RETURN 0x0800
1414 #define VERBOSE_RESET 0xf000
1415 #define VERBOSE_RESET_MID 0x1000
1416 #define VERBOSE_RESET_FIND 0x2000
1417 #define VERBOSE_RESET_PROCESS 0x4000
1418 #define VERBOSE_RESET_RETURN 0x8000
1423 /****************************************************************************
1424 *
1425 * We're going to start putting in function declarations so that order of
1426 * functions is no longer important. As needed, they are added here.
1427 *
1428 ***************************************************************************/
1434 #ifdef AIC7XXX_VERBOSE_DEBUGGING
1436 #endif
1438 /****************************************************************************
1439 *
1440 * These functions are now used. They happen to be wrapped in useless
1441 * inb/outb port read/writes around the real reads and writes because it
1442 * seems that certain very fast CPUs have a problem dealing with us when
1443 * going at full speed.
1444 *
1445 ***************************************************************************/
1447 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
1450 {
1455 }
1459 {
1461 }
1465 {
1467 }
1469 #define PCI_DEVICE_ID_ADAPTEC_1480A 0x6075
1471 #endif
1475 {
1476 #ifdef MMAPIO
1479 {
1481 }
1482 else
1483 {
1485 }
1488 #else
1490 #endif
1491 }
1495 {
1496 #ifdef MMAPIO
1498 {
1500 }
1501 else
1502 {
1504 }
1506 #else
1508 #endif
1509 }
1511 /*+F*************************************************************************
1512 * Function:
1513 * aic7xxx_setup
1514 *
1515 * Description:
1516 * Handle Linux boot parameters. This routine allows for assigning a value
1517 * to a parameter with a ':' between the parameter and the value.
1518 * ie. aic7xxx=unpause:0x0A,extended
1519 *-F*************************************************************************/
1520 static int
1522 {
1546 };
1551 {
1553 {
1556 {
1558 {
1560 {
1573 {
1575 {
1581 tok++;
1588 tok++;
1595 device++;
1597 instance++;
1601 tok++;
1603 {
1605 }
1614 {
1617 {
1620 }
1621 }
1629 }
1630 }
1633 }
1634 }
1636 {
1639 {
1641 }
1642 }
1644 {
1646 }
1647 else
1648 {
1651 {
1653 }
1654 }
1655 }
1656 }
1657 }
1659 }
1663 /*+F*************************************************************************
1664 * Function:
1665 * pause_sequencer
1666 *
1667 * Description:
1668 * Pause the sequencer and wait for it to actually stop - this
1669 * is important since the sequencer can disable pausing for critical
1670 * sections.
1671 *-F*************************************************************************/
1674 {
1677 {
1678 ;
1679 }
1680 }
1682 /*+F*************************************************************************
1683 * Function:
1684 * unpause_sequencer
1685 *
1686 * Description:
1687 * Unpause the sequencer. Unremarkable, yet done often enough to
1688 * warrant an easy way to do it.
1689 *-F*************************************************************************/
1692 {
1696 {
1698 }
1699 }
1701 /*+F*************************************************************************
1702 * Function:
1703 * restart_sequencer
1704 *
1705 * Description:
1706 * Restart the sequencer program from address zero. This assumes
1707 * that the sequencer is already paused.
1708 *-F*************************************************************************/
1711 {
1715 }
1717 /*
1718 * We include the aic7xxx_seq.c file here so that the other defines have
1719 * already been made, and so that it comes before the code that actually
1720 * downloads the instructions (since we don't typically use function
1721 * prototype, our code has to be ordered that way, it's a left-over from
1722 * the original driver days.....I should fix it some time DL).
1723 */
1726 /*+F*************************************************************************
1727 * Function:
1728 * aic7xxx_check_patch
1729 *
1730 * Description:
1731 * See if the next patch to download should be downloaded.
1732 *-F*************************************************************************/
1733 static int
1736 {
1746 {
1748 {
1749 /*
1750 * Start rejecting code.
1751 */
1754 }
1755 else
1756 {
1757 /*
1758 * Found an OK patch. Advance the patch pointer to the next patch
1759 * and wait for our instruction pointer to get here.
1760 */
1761 cur_patch++;
1762 }
1763 }
1767 /*
1768 * Still skipping
1769 */
1772 }
1775 /*+F*************************************************************************
1776 * Function:
1777 * aic7xxx_download_instr
1778 *
1779 * Description:
1780 * Find the next patch to download.
1781 *-F*************************************************************************/
1782 static void
1785 {
1799 /* Pull the opcode */
1802 {
1811 {
1825 {
1828 {
1834 }
1835 else
1836 {
1837 i++;
1838 }
1839 }
1842 /* Fall Through to the next code section */
1843 }
1851 {
1853 }
1855 /* Fall Through to the next code section */
1858 {
1861 /* Calculate odd parity for the instruction */
1863 {
1868 count++;
1869 }
1872 }
1873 else
1874 {
1876 {
1881 }
1882 else
1883 {
1889 }
1890 }
1905 }
1906 }
1909 /*+F*************************************************************************
1910 * Function:
1911 * aic7xxx_loadseq
1912 *
1913 * Description:
1914 * Load the sequencer code into the controller memory.
1915 *-F*************************************************************************/
1916 static void
1918 {
1926 {
1928 }
1929 #if 0
1931 #endif
1942 {
1944 {
1945 /* Skip this instruction for this configuration. */
1947 }
1949 downloaded++;
1950 }
1960 {
1962 }
1965 }
1967 /*+F*************************************************************************
1968 * Function:
1969 * aic7xxx_print_sequencer
1970 *
1971 * Description:
1972 * Print the contents of the sequencer memory to the screen.
1973 *-F*************************************************************************/
1974 static void
1976 {
1985 {
1994 {
1997 }
1998 else
2000 }
2009 }
2011 /*+F*************************************************************************
2012 * Function:
2013 * aic7xxx_info
2014 *
2015 * Description:
2016 * Return a string describing the driver.
2017 *-F*************************************************************************/
2020 {
2038 }
2040 /*+F*************************************************************************
2041 * Function:
2042 * aic7xxx_find_syncrate
2043 *
2044 * Description:
2045 * Look up the valid period to SCSIRATE conversion in our table
2046 *-F*************************************************************************/
2050 {
2055 {
2059 {
2062 }
2067 {
2070 }
2071 else
2072 {
2073 /*
2074 * we don't support the Quick Arbitration variants of dual edge
2075 * clocking. As it turns out, we want to send back the
2076 * same basic option, but without the QA attribute.
2077 * We know that we are responding because we would never set
2078 * these options ourself, we would only respond to them.
2079 */
2081 {
2088 }
2089 }
2095 }
2099 {
2101 {
2103 {
2107 {
2109 /*
2110 * oops, we went too low for the CRC/DualEdge signalling, so
2111 * clear the options byte
2112 */
2114 /*
2115 * We'll be sending a reply to this packet to set the options
2116 * properly, so unilaterally set the period as well.
2117 */
2119 }
2120 else
2121 {
2124 {
2126 }
2127 }
2131 {
2134 {
2136 }
2137 }
2139 }
2141 {
2143 }
2144 }
2145 syncrate++;
2146 }
2149 {
2150 /*
2151 * Use async transfers for this target
2152 */
2156 }
2158 }
2161 /*+F*************************************************************************
2162 * Function:
2163 * aic7xxx_find_period
2164 *
2165 * Description:
2166 * Look up the valid SCSIRATE to period conversion in our table
2167 *-F*************************************************************************/
2168 static unsigned int
2171 {
2175 {
2177 }
2178 else
2179 {
2181 }
2185 {
2187 {
2194 }
2196 {
2198 }
2199 syncrate++;
2200 }
2202 }
2204 /*+F*************************************************************************
2205 * Function:
2206 * aic7xxx_validate_offset
2207 *
2208 * Description:
2209 * Set a valid offset value for a particular card in use and transfer
2210 * settings in use.
2211 *-F*************************************************************************/
2212 static void
2215 {
2218 /* Limit offset to what the card (and device) can do */
2220 {
2222 }
2224 {
2226 }
2227 else
2228 {
2231 else
2233 }
2235 }
2237 /*+F*************************************************************************
2238 * Function:
2239 * aic7xxx_set_syncrate
2240 *
2241 * Description:
2242 * Set the actual syncrate down in the card and in our host structs
2243 *-F*************************************************************************/
2244 static void
2248 {
2259 {
2262 }
2270 {
2275 {
2278 {
2280 {
2282 /*
2283 * mask off the CRC bit in the xfer settings
2284 */
2290 }
2291 }
2293 {
2295 }
2297 }
2299 {
2303 {
2305 {
2307 }
2310 }
2312 {
2320 }
2323 }
2325 {
2327 }
2335 {
2337 {
2343 }
2344 else
2345 {
2348 }
2350 }
2351 }
2354 {
2358 }
2361 {
2365 }
2366 }
2368 /*+F*************************************************************************
2369 * Function:
2370 * aic7xxx_set_width
2371 *
2372 * Description:
2373 * Set the actual width down in the card and in our host structs
2374 *-F*************************************************************************/
2375 static void
2378 {
2389 {
2408 {
2411 }
2412 }
2420 {
2422 {
2424 }
2426 {
2428 }
2429 else
2430 {
2432 }
2433 }
2434 }
2436 /*+F*************************************************************************
2437 * Function:
2438 * scbq_init
2439 *
2440 * Description:
2441 * SCB queue initialization.
2442 *
2443 *-F*************************************************************************/
2444 static void
2446 {
2449 }
2451 /*+F*************************************************************************
2452 * Function:
2453 * scbq_insert_head
2454 *
2455 * Description:
2456 * Add an SCB to the head of the list.
2457 *
2458 *-F*************************************************************************/
2461 {
2462 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
2464 #endif
2466 DRIVER_LOCK
2471 DRIVER_UNLOCK
2472 }
2474 /*+F*************************************************************************
2475 * Function:
2476 * scbq_remove_head
2477 *
2478 * Description:
2479 * Remove an SCB from the head of the list.
2480 *
2481 *-F*************************************************************************/
2484 {
2486 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
2488 #endif
2490 DRIVER_LOCK
2496 DRIVER_UNLOCK
2498 }
2500 /*+F*************************************************************************
2501 * Function:
2502 * scbq_remove
2503 *
2504 * Description:
2505 * Removes an SCB from the list.
2506 *
2507 *-F*************************************************************************/
2510 {
2511 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
2513 #endif
2515 DRIVER_LOCK
2517 {
2518 /* At beginning of queue, remove from head. */
2520 }
2521 else
2522 {
2525 /*
2526 * Search until the next scb is the one we're looking for, or
2527 * we run out of queue.
2528 */
2530 {
2532 }
2534 {
2535 /* Found it. */
2538 {
2539 /* Update the tail when removing the tail. */
2541 }
2542 }
2543 }
2544 DRIVER_UNLOCK
2545 }
2547 /*+F*************************************************************************
2548 * Function:
2549 * scbq_insert_tail
2550 *
2551 * Description:
2552 * Add an SCB at the tail of the list.
2553 *
2554 *-F*************************************************************************/
2557 {
2558 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
2560 #endif
2562 DRIVER_LOCK
2569 DRIVER_UNLOCK
2570 }
2572 /*+F*************************************************************************
2573 * Function:
2574 * aic7xxx_match_scb
2575 *
2576 * Description:
2577 * Checks to see if an scb matches the target/channel as specified.
2578 * If target is ALL_TARGETS (-1), then we're looking for any device
2579 * on the specified channel; this happens when a channel is going
2580 * to be reset and all devices on that channel must be aborted.
2581 *-F*************************************************************************/
2582 static int
2585 {
2600 }
2602 /*+F*************************************************************************
2603 * Function:
2604 * aic7xxx_add_curscb_to_free_list
2605 *
2606 * Description:
2607 * Adds the current scb (in SCBPTR) to the list of free SCBs.
2608 *-F*************************************************************************/
2609 static void
2611 {
2612 /*
2613 * Invalidate the tag so that aic7xxx_find_scb doesn't think
2614 * it's active
2615 */
2621 }
2623 /*+F*************************************************************************
2624 * Function:
2625 * aic7xxx_rem_scb_from_disc_list
2626 *
2627 * Description:
2628 * Removes the current SCB from the disconnected list and adds it
2629 * to the free list.
2630 *-F*************************************************************************/
2631 static unsigned char
2634 {
2642 {
2645 }
2646 else
2647 {
2649 }
2652 }
2654 /*+F*************************************************************************
2655 * Function:
2656 * aic7xxx_busy_target
2657 *
2658 * Description:
2659 * Set the specified target busy.
2660 *-F*************************************************************************/
2663 {
2665 }
2667 /*+F*************************************************************************
2668 * Function:
2669 * aic7xxx_index_busy_target
2670 *
2671 * Description:
2672 * Returns the index of the busy target, and optionally sets the
2673 * target inactive.
2674 *-F*************************************************************************/
2678 {
2683 {
2685 }
2687 }
2689 /*+F*************************************************************************
2690 * Function:
2691 * aic7xxx_find_scb
2692 *
2693 * Description:
2694 * Look through the SCB array of the card and attempt to find the
2695 * hardware SCB that corresponds to the passed in SCB. Return
2696 * SCB_LIST_NULL if unsuccessful. This routine assumes that the
2697 * card is already paused.
2698 *-F*************************************************************************/
2699 static unsigned char
2701 {
2708 {
2711 {
2713 }
2714 }
2717 {
2719 }
2722 }
2724 /*+F*************************************************************************
2725 * Function:
2726 * aic7xxx_allocate_scb
2727 *
2728 * Description:
2729 * Get an SCB from the free list or by allocating a new one.
2730 *-F*************************************************************************/
2731 static int
2733 {
2745 {
2746 /*
2747 * Calculate the optimal number of SCBs to allocate.
2748 *
2749 * NOTE: This formula works because the sizeof(sg_array) is always
2750 * 1024. Therefore, scb_size * i would always be > PAGE_SIZE *
2751 * (i/step). The (i-1) allows the left hand side of the equation
2752 * to grow into the right hand side to a point of near perfect
2753 * efficiency since scb_size * (i -1) is growing slightly faster
2754 * than the right hand side. If the number of SG array elements
2755 * is changed, this function may not be near so efficient any more.
2756 *
2757 * Since the DMA'able buffers are now allocated in a seperate
2758 * chunk this algorithm has been modified to match. The '12'
2759 * and '6' factors in scb_size are for the DMA'able command byte
2760 * and sensebuffers respectively. -DaveM
2761 */
2763 {
2765 {
2768 }
2769 }
2780 {
2783 }
2785 #ifdef AIC7XXX_VERBOSE_DEBUGGING
2787 {
2791 else
2794 }
2795 #endif
2801 {
2811 /*
2812 * Place in the scb array; never is removed
2813 */
2816 }
2818 }
2820 }
2822 /*+F*************************************************************************
2823 * Function:
2824 * aic7xxx_queue_cmd_complete
2825 *
2826 * Description:
2827 * Due to race conditions present in the SCSI subsystem, it is easier
2828 * to queue completed commands, then call scsi_done() on them when
2829 * we're finished. This function queues the completed commands.
2830 *-F*************************************************************************/
2831 static void
2833 {
2836 }
2838 /*+F*************************************************************************
2839 * Function:
2840 * aic7xxx_done_cmds_complete
2841 *
2842 * Description:
2843 * Process the completed command queue.
2844 *-F*************************************************************************/
2845 static void
2847 {
2849 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
2851 #endif
2853 DRIVER_LOCK
2855 {
2860 }
2861 DRIVER_UNLOCK
2862 }
2864 /*+F*************************************************************************
2865 * Function:
2866 * aic7xxx_free_scb
2867 *
2868 * Description:
2869 * Free the scb and insert into the free scb list.
2870 *-F*************************************************************************/
2871 static void
2873 {
2885 }
2887 /*+F*************************************************************************
2888 * Function:
2889 * aic7xxx_done
2890 *
2891 * Description:
2892 * Calls the higher level scsi done function and frees the scb.
2893 *-F*************************************************************************/
2894 static void
2896 {
2903 {
2908 }
2914 {
2918 PCI_DMA_FROMDEVICE);
2919 }
2921 {
2923 }
2925 {
2927 }
2929 {
2931 }
2933 {
2935 {
2940 {
2945 }
2946 else
2947 {
2949 }
2950 #define WIDE_INQUIRY_BITS 0x60
2951 #define SYNC_INQUIRY_BITS 0x10
2952 #define SCSI_VERSION_BITS 0x07
2955 {
2959 }
2960 else
2961 {
2967 AHC_TRANS_GOAL |
2968 AHC_TRANS_CUR) );
2970 }
2972 {
2979 {
2984 else
2986 }
2987 }
2988 else
2989 {
2995 }
2997 {
2999 /*
3000 * OK, we are a SCSI 3 device and we are in need of negotiation.
3001 * Use PPR messages instead of WDTR and SDTR messages.
3002 */
3005 {
3008 }
3013 }
3014 /*
3015 * Get the INQUIRY checksum. We use this on Ultra 160/m
3016 * and older devices both. It allows us to drop speed on any bus type
3017 * while at the same time giving us the needed domain validation for
3018 * Ultra 160/m
3019 *
3020 * Note: We only get the checksum and set the SCANNED bit if this is
3021 * one of our dtr commands. If we don't do this, then we end up
3022 * getting bad checksum results on the mid-level SCSI code's INQUIRY
3023 * commands.
3024 */
3032 {
3034 }
3038 }
3039 #undef WIDE_INQUIRY_BITS
3040 #undef SYNC_INQUIRY_BITS
3041 #undef SCSI_VERSION_BITS
3042 }
3043 }
3045 {
3051 /*
3052 * Check to see if we get an invalid message or a message error
3053 * after failing to negotiate a wide or sync transfer message.
3054 */
3058 {
3060 }
3063 {
3066 {
3069 {
3076 }
3079 }
3080 }
3082 {
3085 {
3088 {
3096 }
3099 }
3100 }
3102 {
3105 {
3108 {
3115 }
3116 /*
3117 * Disable PPR negotiation and revert back to WDTR and SDTR setup
3118 */
3125 }
3126 }
3127 }
3130 {
3133 {
3135 {
3136 /*
3137 * Give extra preference to untagged devices, such as CD-R devices
3138 * This makes it more likely that a drive *won't* stuff up while
3139 * waiting on data at a critical time, such as CD-R writing and
3140 * audio CD ripping operations. Should also benefit tape drives.
3141 */
3143 }
3144 else
3145 {
3147 }
3148 #ifdef AIC7XXX_VERBOSE_DEBUGGING
3152 #endif
3154 {
3158 }
3159 }
3160 }
3162 {
3164 }
3168 {
3171 /*
3172 * XXX: we should actually know how much actually transferred
3173 * XXX: for each command, but apparently that's too difficult.
3174 *
3175 * We set a lower limit of 512 bytes on the transfer length. We
3176 * ignore anything less than this because we don't have a real
3177 * reason to count it. Read/Writes to tapes are usually about 20K
3178 * and disks are a minimum of 512 bytes unless you want to count
3179 * non-read/write commands (such as TEST_UNIT_READY) which we don't
3180 */
3183 {
3185 #ifdef AIC7XXX_PROC_STATS
3192 /*
3193 * For block devices, cmd->request.cmd is always == either READ or
3194 * WRITE. For character devices, this isn't always set properly, so
3195 * we check data_cmnd[0]. This catches the conditions for st.c, but
3196 * I'm still not sure if request.cmd is valid for sg devices.
3197 */
3200 {
3202 #ifdef AIC7XXX_VERBOSE_DEBUGGING
3205 #endif
3206 #ifdef AIC7XXX_PROC_STATS
3209 }
3210 else
3211 {
3213 #ifdef AIC7XXX_VERBOSE_DEBUGGING
3216 #endif
3217 #ifdef AIC7XXX_PROC_STATS
3220 }
3221 #ifdef AIC7XXX_PROC_STATS
3224 {
3226 x++;
3227 }
3229 {
3231 }
3233 {
3235 }
3236 else
3237 {
3239 }
3241 }
3242 }
3246 }
3248 /*+F*************************************************************************
3249 * Function:
3250 * aic7xxx_run_done_queue
3251 *
3252 * Description:
3253 * Calls the aic7xxx_done() for the Scsi_Cmnd of each scb in the
3254 * aborted list, and adds each scb to the free list. If complete
3255 * is TRUE, we also process the commands complete list.
3256 *-F*************************************************************************/
3257 static void
3259 {
3264 {
3267 {
3271 found++;
3273 }
3274 }
3276 {
3279 }
3281 {
3283 }
3284 }
3286 /*+F*************************************************************************
3287 * Function:
3288 * aic7xxx_abort_waiting_scb
3289 *
3290 * Description:
3291 * Manipulate the waiting for selection list and return the
3292 * scb that follows the one that we remove.
3293 *-F*************************************************************************/
3294 static unsigned char
3297 {
3300 /*
3301 * Select the SCB we want to abort and pull the next pointer out of it.
3302 */
3309 /*
3310 * Update the waiting list
3311 */
3313 {
3314 /*
3315 * First in the list
3316 */
3318 }
3319 else
3320 {
3321 /*
3322 * Select the scb that pointed to us and update its next pointer.
3323 */
3326 }
3327 /*
3328 * Point us back at the original scb position and inform the SCSI
3329 * system that the command has been aborted.
3330 */
3333 }
3335 /*+F*************************************************************************
3336 * Function:
3337 * aic7xxx_search_qinfifo
3338 *
3339 * Description:
3340 * Search the queue-in FIFO for matching SCBs and conditionally
3341 * requeue. Returns the number of matching SCBs.
3342 *-F*************************************************************************/
3343 static int
3347 {
3359 {
3362 {
3363 /*
3364 * We found an scb that needs to be removed.
3365 */
3367 {
3369 {
3375 }
3381 {
3383 TRUE);
3384 }
3385 }
3387 {
3389 }
3390 else
3391 {
3392 /*
3393 * Preserve any SCB_RECOVERY_SCB flags on this scb then set the
3394 * flags we were called with, presumeably so aic7xxx_run_done_queue
3395 * can find this scb
3396 */
3400 {
3402 TRUE);
3403 }
3404 }
3405 found++;
3406 }
3407 else
3408 {
3410 }
3411 }
3412 /*
3413 * Now that we've done the work, clear out any left over commands in the
3414 * qinfifo and update the KERNEL_QINPOS down on the card.
3415 *
3416 * NOTE: This routine expect the sequencer to already be paused when
3417 * it is run....make sure it's that way!
3418 */
3421 {
3423 }
3426 else
3430 }
3432 /*+F*************************************************************************
3433 * Function:
3434 * aic7xxx_scb_on_qoutfifo
3435 *
3436 * Description:
3437 * Is the scb that was passed to us currently on the qoutfifo?
3438 *-F*************************************************************************/
3439 static int
3441 {
3445 {
3448 else
3449 i++;
3450 }
3452 }
3455 /*+F*************************************************************************
3456 * Function:
3457 * aic7xxx_reset_device
3458 *
3459 * Description:
3460 * The device at the given target/channel has been reset. Abort
3461 * all active and queued scbs for that target/channel. This function
3462 * need not worry about linked next pointers because if was a MSG_ABORT_TAG
3463 * then we had a tagged command (no linked next), if it was MSG_ABORT or
3464 * MSG_BUS_DEV_RESET then the device won't know about any commands any more
3465 * and no busy commands will exist, and if it was a bus reset, then nothing
3466 * knows about any linked next commands any more. In all cases, we don't
3467 * need to worry about the linked next or busy scb, we just need to clear
3468 * them.
3469 *-F*************************************************************************/
3470 static void
3473 {
3478 /*
3479 * Restore this when we're done
3480 */
3486 /*
3487 * Deal with the busy target and linked next issues.
3488 */
3489 {
3493 /* Make all targets 'relative' to bus A. */
3495 {
3497 {
3511 }
3512 }
3513 else
3514 {
3517 }
3521 {
3523 {
3525 }
3531 {
3539 }
3541 {
3544 else
3549 }
3554 {
3558 {
3565 }
3567 {
3570 {
3573 }
3576 }
3577 }
3579 {
3584 }
3587 {
3590 }
3591 }
3592 }
3599 /*
3600 * Search the waiting_scbs queue for matches, this catches any SCB_QUEUED
3601 * ABORT/RESET commands.
3602 */
3606 {
3613 {
3617 {
3624 }
3626 {
3629 {
3632 }
3635 }
3636 }
3638 {
3643 }
3644 }
3647 /*
3648 * Search waiting for selection list.
3649 */
3653 {
3660 {
3664 {
3665 /*
3666 * No aic7xxx_verbose check here.....we want to see this since it
3667 * means either the kernel driver or the sequencer screwed things up
3668 */
3674 }
3675 else
3676 {
3679 {
3682 {
3685 }
3689 {
3690 /*
3691 * This is either the first scb on the waiting list, or we
3692 * have already yanked the first and haven't left any behind.
3693 * Either way, we need to turn off the selection hardware if
3694 * it isn't already off.
3695 */
3698 }
3699 }
3700 else
3701 {
3704 }
3705 }
3706 }
3708 {
3712 }
3713 }
3715 /*
3716 * Go through disconnected list and remove any entries we have queued
3717 * for completion, zeroing their control byte too.
3718 */
3723 {
3730 {
3734 {
3739 }
3740 else
3741 {
3744 {
3747 {
3750 }
3754 }
3755 else
3756 {
3759 }
3760 }
3761 }
3763 {
3767 }
3768 }
3770 /*
3771 * Walk the free list making sure no entries on the free list have
3772 * a valid SCB_TAG value or SCB_CONTROL byte.
3773 */
3775 {
3781 {
3786 }
3788 {
3791 {
3796 }
3797 else
3798 {
3802 }
3803 }
3805 {
3809 }
3810 }
3812 /*
3813 * Go through the hardware SCB array looking for commands that
3814 * were active but not on any list.
3815 */
3817 {
3821 }
3823 {
3828 {
3833 }
3834 else
3835 {
3838 {
3841 {
3845 }
3846 }
3847 }
3848 }
3850 /*
3851 * Go through the entire SCB array now and look for commands for
3852 * for this target that are stillactive. These are other (most likely
3853 * tagged) commands that were disconnected when the reset occurred.
3854 * Any commands we find here we know this about, it wasn't on any queue,
3855 * it wasn't in the qinfifo, it wasn't in the disconnected or waiting
3856 * lists, so it really must have been a paged out SCB. In that case,
3857 * we shouldn't need to bother with updating any counters, just mark
3858 * the correct flags and go on.
3859 */
3861 {
3866 {
3868 {
3873 }
3876 }
3877 }
3880 }
3883 /*+F*************************************************************************
3884 * Function:
3885 * aic7xxx_clear_intstat
3886 *
3887 * Description:
3888 * Clears the interrupt status.
3889 *-F*************************************************************************/
3890 static void
3892 {
3893 /* Clear any interrupt conditions this may have caused. */
3898 }
3900 /*+F*************************************************************************
3901 * Function:
3902 * aic7xxx_reset_current_bus
3903 *
3904 * Description:
3905 * Reset the current SCSI bus.
3906 *-F*************************************************************************/
3907 static void
3909 {
3911 /* Disable reset interrupts. */
3914 /* Turn off the bus' current operations, after all, we shouldn't have any
3915 * valid commands left to cause a RSELI and SELO once we've tossed the
3916 * bus away with this reset, so we might as well shut down the sequencer
3917 * until the bus is restarted as oppossed to saving the current settings
3918 * and restoring them (which makes no sense to me). */
3920 /* Turn on the bus reset. */
3925 /*
3926 * Some of the new Ultra2 chipsets need a longer delay after a chip
3927 * reset than just the init setup creates, so we have to delay here
3928 * before we go into a reset in order to make the chips happy.
3929 */
3932 else
3935 /* Turn off the bus reset. */
3940 /* Re-enable reset interrupts. */
3943 }
3945 /*+F*************************************************************************
3946 * Function:
3947 * aic7xxx_reset_channel
3948 *
3949 * Description:
3950 * Reset the channel.
3951 *-F*************************************************************************/
3952 static void
3954 {
3965 {
3970 }
3971 else
3972 {
3974 {
3975 /* Channel A */
3980 }
3981 else
3982 {
3989 {
3991 }
3992 else
3993 {
3995 }
3996 }
3997 }
4000 {
4001 /*
4002 * Revert to async/narrow transfers until we renegotiate.
4003 */
4006 {
4008 }
4009 offset_min++;
4010 }
4012 /*
4013 * Reset the bus and unpause/restart the controller
4014 */
4018 else
4021 {
4022 /*
4023 * Case 1: Command for another bus is active
4024 */
4028 /*
4029 * Stealthily reset the other bus without upsetting the current bus.
4030 */
4034 {
4036 }
4040 }
4041 else
4042 {
4043 /*
4044 * Case 2: A command from this bus is active or we're idle.
4045 */
4050 SIMODE1);
4055 {
4057 }
4060 }
4063 /*
4064 * Clean up all the state information for the pending transactions
4065 * on this bus.
4066 */
4070 {
4072 }
4075 }
4077 /*+F*************************************************************************
4078 * Function:
4079 * aic7xxx_run_waiting_queues
4080 *
4081 * Description:
4082 * Scan the awaiting_scbs queue downloading and starting as many
4083 * scbs as we can.
4084 *-F*************************************************************************/
4085 static void
4087 {
4091 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
4093 #endif
4101 /*
4102 * First handle SCBs that are waiting but have been assigned a slot.
4103 */
4104 DRIVER_LOCK
4106 {
4109 {
4111 }
4116 {
4118 }
4119 else
4120 {
4125 {
4127 }
4129 sent++;
4130 }
4131 }
4133 {
4136 else
4137 {
4141 }
4144 }
4145 DRIVER_UNLOCK
4146 }
4148 #ifdef CONFIG_PCI
4150 #define DPE 0x80
4151 #define SSE 0x40
4152 #define RMA 0x20
4153 #define RTA 0x10
4154 #define STA 0x08
4155 #define DPR 0x01
4157 /*+F*************************************************************************
4158 * Function:
4159 * aic7xxx_pci_intr
4160 *
4161 * Description:
4162 * Check the scsi card for PCI errors and clear the interrupt
4163 *
4164 * NOTE: If you don't have this function and a 2940 card encounters
4165 * a PCI error condition, the machine will end up locked as the
4166 * interrupt handler gets slammed with non-stop PCI error interrupts
4167 *-F*************************************************************************/
4168 static void
4170 {
4173 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
4175 #else
4178 #endif
4199 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
4201 #else
4204 #endif
4211 }
4214 /*+F*************************************************************************
4215 * Function:
4216 * aic7xxx_timer
4217 *
4218 * Description:
4219 * Take expired extries off of delayed queues and place on waiting queue
4220 * then run waiting queue to start commands.
4221 ***************************************************************************/
4222 static void
4224 {
4229 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
4230 DRIVER_LOCK
4231 #else
4233 #endif
4237 {
4240 }
4242 {
4246 {
4253 {
4255 }
4257 {
4262 /*
4263 * Well, things are screwed now, wait for a reset to clean the junk
4264 * out.
4265 */
4266 }
4267 }
4269 {
4271 {
4273 {
4275 }
4276 }
4277 else
4278 {
4281 }
4282 }
4283 }
4285 {
4287 }
4290 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
4291 DRIVER_UNLOCK
4292 #else
4294 #endif
4295 }
4297 /*+F*************************************************************************
4298 * Function:
4299 * aic7xxx_construct_ppr
4300 *
4301 * Description:
4302 * Build up a Parallel Protocol Request message for use with SCSI-3
4303 * devices.
4304 *-F*************************************************************************/
4305 static void
4307 {
4319 }
4321 /*+F*************************************************************************
4322 * Function:
4323 * aic7xxx_construct_sdtr
4324 *
4325 * Description:
4326 * Constucts a synchronous data transfer message in the message
4327 * buffer on the sequencer.
4328 *-F*************************************************************************/
4329 static void
4332 {
4339 }
4341 /*+F*************************************************************************
4342 * Function:
4343 * aic7xxx_construct_wdtr
4344 *
4345 * Description:
4346 * Constucts a wide data transfer message in the message buffer
4347 * on the sequencer.
4348 *-F*************************************************************************/
4349 static void
4351 {
4357 }
4359 /*+F*************************************************************************
4360 * Function:
4361 * aic7xxx_calc_residual
4362 *
4363 * Description:
4364 * Calculate the residual data not yet transferred.
4365 *-F*************************************************************************/
4366 static void
4368 {
4376 /*
4377 * Don't destroy valid residual information with
4378 * residual coming from a check sense operation.
4379 */
4382 {
4383 /*
4384 * We had an underflow. At this time, there's only
4385 * one other driver that bothers to check for this,
4386 * and cmd->underflow seems to be set rather half-
4387 * heartedly in the higher-level SCSI code.
4388 */
4391 {
4393 }
4399 {
4407 }
4408 }
4410 /*
4411 * Clean out the residual information in the SCB for the
4412 * next consumer.
4413 */
4418 }
4420 /*+F*************************************************************************
4421 * Function:
4422 * aic7xxx_handle_device_reset
4423 *
4424 * Description:
4425 * Interrupt handler for sequencer interrupts (SEQINT).
4426 *-F*************************************************************************/
4427 static void
4429 {
4436 /*
4437 * Go back to async/narrow transfers and renegotiate.
4438 */
4451 }
4453 /*+F*************************************************************************
4454 * Function:
4455 * aic7xxx_handle_seqint
4456 *
4457 * Description:
4458 * Interrupt handler for sequencer interrupts (SEQINT).
4459 *-F*************************************************************************/
4460 static void
4462 {
4472 else
4478 /*
4479 * Go ahead and clear the SEQINT now, that avoids any interrupt race
4480 * conditions later on in case we enable some other interrupt.
4481 */
4484 {
4486 {
4488 SCSISEQ);
4497 }
4501 {
4506 }
4510 {
4511 /*
4512 * The reconnecting target either did not send an identify
4513 * message, or did, but we didn't find an SCB to match and
4514 * before it could respond to our ATN/abort, it hit a dataphase.
4515 * The only safe thing to do is to blow it away with a bus
4516 * reset.
4517 */
4526 }
4531 {
4536 }
4537 else
4538 {
4542 }
4546 {
4551 #ifdef AIC7XXX_VERBOSE_DEBUGGING
4555 #endif
4557 /*
4558 * To actually receive the message, simply turn on
4559 * REQINIT interrupts and let our interrupt handler
4560 * do the rest (REQINIT should already be true).
4561 */
4565 /*
4566 * We don't want the sequencer unpaused yet so we return early
4567 */
4569 }
4572 {
4573 /*
4574 * What we care about here is if we had an outstanding SDTR
4575 * or WDTR message for this target. If we did, this is a
4576 * signal that the target is refusing negotiation.
4577 */
4588 {
4590 {
4591 /*
4592 * OK...the device seems able to accept tagged commands, but
4593 * not ordered tag commands, only simple tag commands. So, we
4594 * disable ordered tag commands and go on with life just like
4595 * normal.
4596 */
4602 /*
4603 * OK..we set the tag type to simple tag command, now we re-assert
4604 * ATNO and hope this will take us into the identify phase again
4605 * so we can resend the tag type and info to the device.
4606 */
4609 }
4611 {
4615 /*
4616 * Hmmmm....the device is flaking out on tagged commands. The
4617 * bad thing is that we already have tagged commands enabled in
4618 * the device struct in the mid level code. We also have a queue
4619 * set according to the tagged queue depth. Gonna have to live
4620 * with it by controlling our queue depth internally and making
4621 * sure we don't set the tagged command flag any more.
4622 */
4627 /*
4628 * We set this command up as a bus device reset. However, we have
4629 * to clear the tag type as it's causing us problems. We shouldnt
4630 * have to worry about any other commands being active, since if
4631 * the device is refusing tagged commands, this should be the
4632 * first tagged command sent to the device, however, we do have
4633 * to worry about any other tagged commands that may already be
4634 * in the qinfifo. The easiest way to do this, is to issue a BDR,
4635 * send all the commands back to the mid level code, then let them
4636 * come back and get rebuilt as untagged commands.
4637 */
4645 {
4648 {
4650 {
4652 reset++;
4653 }
4655 }
4656 }
4658 /*
4659 * Wait until after the for loop to set the busy index since
4660 * aic7xxx_reset_device will clear the busy index during its
4661 * operation.
4662 */
4668 }
4669 }
4671 {
4672 /*
4673 * As per the draft specs, any device capable of supporting any of
4674 * the option values other than 0 are not allowed to reject the
4675 * PPR message. Instead, they must negotiate out what they do
4676 * support instead of rejecting our offering.
4677 */
4688 {
4691 }
4693 {
4698 }
4700 {
4704 {
4707 }
4708 }
4710 {
4713 }
4714 }
4716 {
4717 /*
4718 * note 8bit xfers and clear flag
4719 */
4729 {
4732 }
4734 }
4736 {
4737 /*
4738 * note asynch xfers and clear flag
4739 */
4747 {
4750 }
4751 }
4753 {
4754 /*
4755 * Otherwise, we ignore it.
4756 */
4759 }
4760 }
4764 {
4769 /* The sequencer will notify us when a command has an error that
4770 * would be of interest to the kernel. This allows us to leave
4771 * the sequencer running in the common case of command completes
4772 * without error. The sequencer will have DMA'd the SCB back
4773 * up to us, so we can reference the drivers SCB array.
4774 *
4775 * Set the default return value to 0 indicating not to send
4776 * sense. The sense code will change this if needed and this
4777 * reduces code duplication.
4778 */
4782 {
4786 }
4791 {
4795 }
4796 else
4797 {
4805 {
4815 {
4817 /*
4818 * XXX - How do we save the residual (if there is one).
4819 */
4823 /*
4824 * Send a sense command to the requesting target.
4825 * XXX - revisit this and get rid of the memcopys.
4826 */
4837 /*
4838 * XXX - We should allow disconnection, but can't as it
4839 * might allow overlapped tagged commands.
4840 */
4841 /* hscb->control &= DISCENB; */
4858 /*
4859 * This problem could be caused if the target has lost power
4860 * or found some other way to loose the negotiation settings,
4861 * so if needed, we'll re-negotiate while doing the sense cmd.
4862 * However, if this SCB already was attempting to negotiate,
4863 * then we assume this isn't the problem and skip this part.
4864 */
4868 {
4872 }
4874 {
4875 /*
4876 * This is already a negotiation command, so we must have
4877 * already done PPR, WDTR or SDTR. Since our negotiation
4878 * could have gotten rejected, we don't really know the
4879 * full state of things. Don't do anything here, and allow
4880 * the negotiation_complete() handler to do the right
4881 * thing.
4882 */
4884 /*
4885 * This is the important part though. We are getting sense
4886 * info back from this device. It's going into a fake
4887 * command. We need to put that into the real command
4888 * instead so that the mid level SCSI code can act upon it.
4889 * So, when we set up these fake commands, the next pointer
4890 * is used to point to the real command. Use that to change
4891 * the address of our sense_buffer[] to the real command.
4892 * However, don't do this if the real command is also a
4893 * TEST_UNIT_READY as it will most likely pull down its own
4894 * SENSE information anyway.
4895 */
4898 }
4902 PCI_DMA_FROMDEVICE));
4906 /*
4907 * Ensure the target is busy since this will be an
4908 * an untagged request.
4909 */
4910 #ifdef AIC7XXX_VERBOSE_DEBUGGING
4912 {
4917 else
4920 }
4921 #endif
4934 {
4937 /*
4938 * We have to look three places for queued commands:
4939 * 1: QINFIFO
4940 * 2: p->waiting_scbs queue
4941 * 3: WAITING_SCBS list on card (for commands that are started
4942 * but haven't yet made it to the device)
4943 */
4949 {
4953 SCB_LIST_NULL) )
4954 {
4957 prev_scbp);
4958 }
4959 }
4965 {
4969 {
4972 SCB_LIST_NULL) )
4973 {
4975 {
4980 }
4982 next_scbp);
4991 {
4992 /* We were first on the list,
4993 * so we kill the selection
4994 * hardware. Let the sequencer
4995 * re-init the hardware itself
4996 */
5000 }
5001 else
5002 {
5005 }
5006 }
5007 else
5008 {
5011 }
5013 }
5016 {
5021 }
5028 {
5031 {
5033 }
5034 else
5035 {
5037 }
5039 {
5043 }
5047 }
5048 #ifdef AIC7XXX_VERBOSE_DEBUGGING
5051 {
5057 else
5060 }
5061 #endif
5063 {
5066 {
5070 }
5071 else
5072 {
5074 }
5077 {
5087 }
5089 {
5091 {
5096 }
5101 }
5102 else
5103 {
5107 }
5108 }
5110 }
5117 {
5119 }
5123 }
5127 {
5134 /*
5135 * This SCB had a MK_MESSAGE set in its control byte informing
5136 * the sequencer that we wanted to send a special message to
5137 * this target.
5138 */
5143 {
5147 }
5150 {
5156 }
5158 {
5160 {
5162 }
5163 else
5164 {
5166 }
5171 }
5173 {
5178 {
5181 {
5185 MSG_EXT_WDTR_BUS_16_BIT) &&
5187 {
5190 }
5191 else
5192 {
5194 }
5195 }
5196 else
5197 {
5199 }
5200 }
5202 {
5204 }
5205 else
5206 {
5208 }
5214 {
5219 }
5221 }
5223 {
5225 {
5228 }
5230 }
5232 {
5235 /*
5236 * Now that the device is selected, use the bits in SBLKCTL and
5237 * SSTAT2 to determine the max sync rate for this device.
5238 */
5240 {
5243 {
5245 }
5246 else
5247 {
5249 }
5250 }
5252 {
5254 }
5255 else
5256 {
5258 }
5262 {
5267 }
5270 }
5271 else
5272 {
5276 }
5277 /*
5278 * We've set everything up to send our message, now to actually do
5279 * so we need to enable reqinit interrupts and let the interrupt
5280 * handler do the rest. We don't want to unpause the sequencer yet
5281 * though so we'll return early. We also have to make sure that
5282 * we clear the SEQINT *BEFORE* we set the REQINIT handler active
5283 * or else it's possible on VLB cards to loose the first REQINIT
5284 * interrupt. Edge triggered EISA cards could also loose this
5285 * interrupt, although PCI and level triggered cards should not
5286 * have this problem since they continually interrupt the kernel
5287 * until we take care of the situation.
5288 */
5295 }
5299 {
5305 /*
5306 * XXX - What do we really want to do on an overrun? The
5307 * mid-level SCSI code should handle this, but for now,
5308 * we'll just indicate that the command should retried.
5309 * If we retrieved sense info on this target, then the
5310 * base SENSE info should have been saved prior to the
5311 * overrun error. In that case, we return DID_OK and let
5312 * the mid level code pick up on the sense info. Otherwise
5313 * we return DID_ERROR so the command will get retried.
5314 */
5316 {
5324 {
5326 i,
5329 }
5331 }
5332 else
5335 }
5339 {
5347 {
5350 /*
5351 * XXX: Add error handling here
5352 */
5354 }
5357 {
5362 }
5364 /*
5365 * We have a valid scb to use on this WIDE_RESIDUE message, so
5366 * we need to walk the sg list looking for this particular sg
5367 * segment, then see if we happen to be at the very beginning of
5368 * the segment. If we are, then we have to back things up to
5369 * the previous segment. If not, then we simply need to remove
5370 * one byte from this segments address and add one to the byte
5371 * count.
5372 */
5382 /*
5383 * Make sure this is a valid sg_seg for the given pointer
5384 */
5387 {
5404 }
5406 /*
5407 * If our current address matches the sg_seg->address then we
5408 * have to back up the sg array to the previous segment and set
5409 * it up to have only one byte of transfer left to go.
5410 */
5412 {
5414 {
5418 }
5419 resid_sgcnt++;
5420 index--;
5442 /*
5443 * The sequencer actually wants to find the new address and byte
5444 * count in the SHCNT and SHADDR register sets. These registers
5445 * are a shadow of the regular HCNT and HADDR registers. On the
5446 * Ultra2 controllers, these registers are read only and the way
5447 * we have to set their values is to put the values we want into
5448 * the HCNT and HADDR registers and then output PRELOADEN into
5449 * the DFCNTRL register which causes the card to latch the current
5450 * values in the HADDR and HCNT registers and drop it through to
5451 * the shadow registers. On older cards we copy them directly
5452 * across by hand.
5453 */
5455 {
5460 {
5463 }
5464 }
5465 else
5466 {
5474 }
5475 }
5476 else
5477 {
5478 /*
5479 * Back the data pointer up by one and add one to the remaining
5480 * byte count. Then store that in the HCNT and HADDR registers.
5481 */
5482 cur_addr--;
5483 resid_dcnt++;
5495 {
5500 {
5503 }
5504 }
5505 else
5506 {
5514 }
5515 }
5516 }
5520 #if AIC7XXX_NOT_YET
5522 {
5525 }
5529 {
5532 }
5535 /* XXX Fill these in later */
5542 #endif
5549 }
5551 /*
5552 * Clear the sequencer interrupt and unpause the sequencer.
5553 */
5555 }
5557 /*+F*************************************************************************
5558 * Function:
5559 * aic7xxx_parse_msg
5560 *
5561 * Description:
5562 * Parses incoming messages into actions on behalf of
5563 * aic7xxx_handle_reqinit
5564 *_F*************************************************************************/
5565 static int
5567 {
5581 /*
5582 * Parse as much of the message as is availible,
5583 * rejecting it if we don't support it. When
5584 * the entire message is availible and has been
5585 * handled, return TRUE indicating that we have
5586 * parsed an entire message.
5587 */
5590 {
5592 }
5594 /*
5595 * Just accept the length byte outright and perform
5596 * more checking once we know the message type.
5597 */
5600 {
5602 {
5604 {
5610 {
5613 }
5616 {
5618 }
5624 /*
5625 * Even if we are an Ultra3 card, don't allow Ultra3 sync rates when
5626 * using the SDTR messages. We need the PPR messages to enable the
5627 * higher speeds that include things like Dual Edge clocking.
5628 */
5630 {
5633 {
5635 }
5636 else
5637 {
5639 }
5640 }
5642 {
5644 }
5645 else
5646 {
5648 }
5649 /*
5650 * We might have a device that is starting negotiation with us
5651 * before we can start up negotiation with it....be prepared to
5652 * have a device ask for a higher speed then we want to give it
5653 * in that case
5654 */
5657 {
5661 {
5662 /*
5663 * Not only is the device starting this up, but it also hasn't
5664 * been scanned yet, so this would likely be our TUR or our
5665 * INQUIRY command at scan time, so we need to use the
5666 * settings from the SEEPROM if they existed. Of course, even
5667 * if we didn't find a SEEPROM, we stuffed default values into
5668 * the user settings anyway, so use those in all cases.
5669 */
5673 {
5675 }
5677 {
5679 }
5680 else
5681 {
5683 }
5685 }
5687 {
5690 }
5695 }
5703 /*
5704 * Did we drop to async? Or are we sending a reply? If we are,
5705 * then we have to make sure that the reply value reflects the proper
5706 * settings so we need to set the goal values according to what
5707 * we need to send.
5708 */
5712 {
5715 }
5717 /*
5718 * Did we start this, if not, or if we went to low and had to
5719 * go async, then send an SDTR back to the target
5720 */
5726 {
5733 }
5736 }
5738 {
5742 {
5745 }
5748 {
5750 }
5755 {
5757 {
5759 {
5764 {
5767 }
5770 {
5774 }
5776 {
5778 }
5779 }
5782 }
5783 else
5784 {
5786 {
5787 /*
5788 * Well, we now know the WDTR and SYNC caps of this device since
5789 * it contacted us first, mark it as such and copy the user stuff
5790 * over to the goal stuff.
5791 */
5795 {
5797 {
5799 }
5803 {
5805 }
5806 else
5807 {
5809 }
5810 }
5815 }
5817 {
5820 }
5822 {
5824 {
5827 MSG_EXT_WDTR_BUS_16_BIT) )
5828 {
5831 }
5834 {
5840 }
5841 }
5849 }
5853 /*
5854 * By virtue of the SCSI spec, a WDTR message negates any existing
5855 * SDTR negotiations. So, even if needsdtr isn't marked for this
5856 * device, we still have to do a new SDTR message if the device
5857 * supports SDTR at all. Therefore, we check needsdtr_copy instead
5858 * of needstr.
5859 */
5865 }
5867 {
5874 {
5877 }
5880 {
5882 }
5890 {
5893 trans_options);
5894 }
5898 {
5900 {
5902 }
5903 else
5904 {
5906 }
5907 }
5908 else
5909 {
5911 }
5912 /*
5913 * We might have a device that is starting negotiation with us
5914 * before we can start up negotiation with it....be prepared to
5915 * have a device ask for a higher speed then we want to give it
5916 * in that case
5917 */
5920 {
5925 {
5926 /*
5927 * Not only is the device starting this up, but it also hasn't
5928 * been scanned yet, so this would likely be our TUR or our
5929 * INQUIRY command at scan time, so we need to use the
5930 * settings from the SEEPROM if they existed. Of course, even
5931 * if we didn't find a SEEPROM, we stuffed default values into
5932 * the user settings anyway, so use those in all cases.
5933 */
5937 {
5939 {
5941 }
5945 {
5947 }
5948 else
5949 {
5951 }
5952 }
5958 }
5960 {
5963 }
5971 {
5973 {
5976 MSG_EXT_WDTR_BUS_16_BIT) )
5977 {
5980 }
5983 {
5989 }
5990 }
5991 }
5992 else
5993 {
5995 {
5997 {
6002 {
6005 }
6008 {
6009 /*
6010 * According to the spec, if we aren't wide, we also can't be
6011 * Dual Edge so clear the options byte
6012 */
6016 }
6018 {
6020 }
6021 }
6022 }
6037 {
6044 }
6048 {
6054 }
6057 }
6059 {
6062 }
6067 {
6071 }
6073 }
6076 /*+F*************************************************************************
6077 * Function:
6078 * aic7xxx_handle_reqinit
6079 *
6080 * Description:
6081 * Interrupt handler for REQINIT interrupts (used to transfer messages to
6082 * and from devices).
6083 *_F*************************************************************************/
6084 static void
6086 {
6092 {
6094 {
6102 {
6103 /* Time to end the message */
6106 /*
6107 * NOTE-TO-MYSELF: If you clear the REQINIT after you
6108 * disable REQINITs, then cases of REJECT_MSG stop working
6109 * and hang the bus
6110 */
6116 {
6119 #ifdef AIC7XXX_VERBOSE_DEBUGGING
6123 #endif
6124 }
6125 else
6126 {
6128 #ifdef AIC7XXX_VERBOSE_DEBUGGING
6132 #endif
6133 }
6135 }
6136 else
6137 {
6138 /*
6139 * Present the byte on the bus (clearing REQINIT) but don't
6140 * unpause the sequencer.
6141 */
6145 }
6147 }
6149 {
6153 {
6155 /* Pull the byte in without acking it */
6158 /* Ack the byte */
6163 }
6165 {
6166 #ifdef AIC7XXX_VERBOSE_DEBUGGING
6168 {
6172 else
6175 }
6176 #endif
6177 /* Time to end our message session */
6184 }
6186 }
6188 {
6191 }
6193 }
6195 /*+F*************************************************************************
6196 * Function:
6197 * aic7xxx_handle_scsiint
6198 *
6199 * Description:
6200 * Interrupt handler for SCSI interrupts (SCSIINT).
6201 *-F*************************************************************************/
6202 static void
6204 {
6213 {
6216 {
6218 }
6219 }
6220 else
6221 {
6223 }
6227 {
6232 else
6240 /*
6241 * Go through and abort all commands for the channel, but do not
6242 * reset the channel again.
6243 */
6247 }
6249 {
6250 /*
6251 * First look at what phase we were last in. If it's message-out,
6252 * chances are pretty good that the bus free was in response to
6253 * one of our abort requests.
6254 */
6263 else
6267 SCSISEQ);
6269 {
6275 {
6284 }
6286 {
6290 }
6291 }
6294 {
6295 /*
6296 * This might be a SCSI-3 device that is dropping the bus due to
6297 * errors and signalling that we should reduce the transfer speed.
6298 * All we have to do is complete this command (since it's a negotiation
6299 * command already) and the checksum routine should flag an error and
6300 * reduce the speed setting and renegotiate. We call the reset routing
6301 * just to clean out the hardware from this scb.
6302 */
6307 }
6309 {
6311 {
6315 {
6317 }
6318 else
6319 {
6321 }
6324 }
6325 else
6326 {
6329 }
6334 }
6337 SIMODE1);
6343 }
6345 {
6352 {
6353 /*
6354 * I'm still trying to track down exactly how this happens, but until
6355 * I find it, this code will make sure we aren't passing bogus values
6356 * into the SCBPTR register, even if that register will just wrap
6357 * things around, we still don't like having out of range variables.
6358 *
6359 * NOTE: Don't check the aic7xxx_verbose variable, I want this message
6360 * to always be displayed.
6361 */
6366 else
6368 }
6374 {
6377 {
6379 }
6380 }
6382 {
6391 }
6392 else
6393 {
6397 /*
6398 * Clear out this hardware SCB
6399 */
6402 /*
6403 * Clear out a few values in the card that are in an undetermined
6404 * state.
6405 */
6408 /*
6409 * Shift the waiting for selection queue forward
6410 */
6414 /*
6415 * Put this SCB back on the free list.
6416 */
6418 #ifdef AIC7XXX_VERBOSE_DEBUGGING
6421 #endif
6423 {
6424 /*
6425 * We know that this particular SCB had to be the queued abort since
6426 * the disconnected SCB would have gotten a reconnect instead.
6427 * What we need to do then is to let the command timeout again so
6428 * we get a reset since this abort just failed.
6429 */
6432 }
6434 {
6435 /*
6436 * Turn off the needsdtr, needwdtr, and needppr bits since this device
6437 * doesn't seem to exist.
6438 */
6445 }
6446 }
6447 /*
6448 * Restarting the sequencer will stop the selection and make sure devices
6449 * are allowed to reselect in.
6450 */
6459 }
6461 {
6468 /*
6469 * Turn off the interrupt and set status to zero, so that it
6470 * falls through the rest of the SCSIINT code.
6471 */
6476 }
6478 {
6479 /*
6480 * Determine the bus phase and queue an appropriate message.
6481 */
6491 {
6516 }
6518 /*
6519 * A parity error has occurred during a data
6520 * transfer phase. Flag it and continue.
6521 */
6523 {
6527 {
6530 }
6532 {
6535 }
6537 {
6540 }
6542 {
6545 }
6546 }
6547 else
6548 {
6551 }
6554 {
6558 /*
6559 * oops, we had a failure, lower the transfer rate and try again. It's
6560 * worth noting here that it might be wise to also check for typical
6561 * wide setting on narrow cable type problems and try disabling wide
6562 * instead of slowing down if those exist. That's hard to do with simple
6563 * checksums though.
6564 */
6566 {
6567 syncrate++;
6570 {
6573 {
6575 }
6576 }
6577 else
6578 {
6582 }
6586 }
6588 }
6589 else
6590 {
6592 }
6594 /*
6595 * We've set the hardware to assert ATN if we get a parity
6596 * error on "in" phases, so all we need to do is stuff the
6597 * message buffer with the appropriate message. "In" phases
6598 * have set mesg_out to something other than MSG_NOP.
6599 */
6601 {
6604 }
6608 }
6611 {
6612 #ifdef AIC7XXX_VERBOSE_DEBUGGING
6616 #endif
6619 }
6620 else
6621 {
6622 /*
6623 * We don't know what's going on. Turn off the
6624 * interrupt source and try to continue.
6625 */
6633 }
6635 {
6637 }
6638 }
6640 #ifdef AIC7XXX_VERBOSE_DEBUGGING
6641 static void
6643 {
6648 #define SCB_NO_LIST 0
6649 #define SCB_FREE_LIST 1
6650 #define SCB_WAITING_LIST 2
6651 #define SCB_DISCONNECTED_LIST 4
6652 #define SCB_CURRENTLY_ACTIVE 8
6654 /*
6655 * Note, these checks will fail on a regular basis once the machine moves
6656 * beyond the bus scan phase. The problem is race conditions concerning
6657 * the scbs and where they are linked in. When you have 30 or so commands
6658 * outstanding on the bus, and run this twice with every interrupt, the
6659 * chances get pretty good that you'll catch the sequencer with an SCB
6660 * only partially linked in. Therefore, once we pass the scan phase
6661 * of the bus, we really should disable this function.
6662 */
6668 {
6671 }
6676 {
6679 }
6680 else
6681 {
6684 {
6686 {
6690 }
6694 }
6695 }
6700 {
6703 }
6704 else
6705 {
6708 {
6710 {
6714 }
6718 }
6719 }
6724 {
6727 }
6728 else
6729 {
6732 {
6734 {
6738 }
6742 }
6743 }
6747 {
6752 {
6755 }
6757 {
6760 }
6762 lost++;
6764 {
6767 }
6768 }
6772 {
6776 }
6778 }
6779 #endif
6782 /*+F*************************************************************************
6783 * Function:
6784 * aic7xxx_handle_command_completion_intr
6785 *
6786 * Description:
6787 * SCSI command completion interrupt handler.
6788 *-F*************************************************************************/
6789 static void
6791 {
6796 #ifdef AIC7XXX_VERBOSE_DEBUGGING
6799 #endif
6801 /*
6802 * Read the INTSTAT location after clearing the CMDINT bit. This forces
6803 * any posted PCI writes to flush to memory. Gerard Roudier suggested
6804 * this fix to the possible race of clearing the CMDINT bit but not
6805 * having all command bytes flushed onto the qoutfifo.
6806 */
6809 /*
6810 * The sequencer will continue running when it
6811 * issues this interrupt. There may be >1 commands
6812 * finished, so loop until we've processed them all.
6813 */
6816 {
6821 else
6824 {
6828 }
6830 {
6835 }
6837 {
6841 {
6844 }
6848 SCB_QUEUED_ABORT);
6850 }
6852 {
6853 /*
6854 * We started to abort this, but it completed on us, let it
6855 * through as successful
6856 */
6858 }
6860 {
6870 {
6872 }
6876 }
6877 }
6878 }
6880 /*+F*************************************************************************
6881 * Function:
6882 * aic7xxx_isr
6883 *
6884 * Description:
6885 * SCSI controller interrupt handler.
6886 *-F*************************************************************************/
6887 static void
6889 {
6895 /*
6896 * Just a few sanity checks. Make sure that we have an int pending.
6897 * Also, if PCI, then we are going to check for a PCI bus error status
6898 * should we get too many spurious interrupts.
6899 */
6901 {
6902 #ifdef CONFIG_PCI
6905 {
6907 {
6909 }
6911 }
6913 {
6915 }
6916 #endif
6918 }
6922 /*
6923 * Keep track of interrupts for /proc/scsi
6924 */
6927 #ifdef AIC7XXX_VERBOSE_DEBUGGING
6931 #endif
6933 /*
6934 * Handle all the interrupt sources - especially for SCSI
6935 * interrupts, we won't get a second chance at them.
6936 */
6938 {
6940 }
6943 {
6949 {
6951 {
6953 }
6954 }
6959 #ifdef CONFIG_PCI
6962 #endif
6964 {
6967 }
6969 {
6972 }
6973 #ifdef AIC7XXX_VERBOSE_DEBUGGING
6975 {
6978 else
6980 }
6981 #endif
6984 }
6987 {
6989 }
6992 {
6994 }
6996 #ifdef AIC7XXX_VERBOSE_DEBUGGING
7000 #endif
7002 }
7004 /*+F*************************************************************************
7005 * Function:
7006 * do_aic7xxx_isr
7007 *
7008 * Description:
7009 * This is a gross hack to solve a problem in linux kernels 2.1.85 and
7010 * above. Please, children, do not try this at home, and if you ever see
7011 * anything like it, please inform the Gross Hack Police immediately
7012 *-F*************************************************************************/
7013 static void
7015 {
7022 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,95)
7025 {
7027 }
7028 do
7029 {
7036 #else
7038 {
7040 }
7041 DRIVER_LOCK
7042 do
7043 {
7046 DRIVER_UNLOCK
7050 #endif
7051 }
7053 /*+F*************************************************************************
7054 * Function:
7055 * aic7xxx_device_queue_depth
7056 *
7057 * Description:
7058 * Determines the queue depth for a given device. There are two ways
7059 * a queue depth can be obtained for a tagged queueing device. One
7060 * way is the default queue depth which is determined by whether
7061 * AIC7XXX_CMDS_PER_DEVICE is defined. If it is defined, then it is used
7062 * as the default queue depth. Otherwise, we use either 4 or 8 as the
7063 * default queue depth (dependent on the number of hardware SCBs).
7064 * The other way we determine queue depth is through the use of the
7065 * aic7xxx_tag_info array which is enabled by defining
7066 * AIC7XXX_TAGGED_QUEUEING_BY_DEVICE. This array can be initialized
7067 * with queue depths for individual devices. It also allows tagged
7068 * queueing to be [en|dis]abled for a specific adapter.
7069 *-F*************************************************************************/
7070 static void
7072 {
7086 {
7092 {
7097 }
7098 else
7099 {
7101 {
7104 {
7110 }
7112 }
7113 else
7114 {
7117 {
7120 }
7122 {
7124 }
7125 else
7126 {
7129 }
7130 }
7132 {
7134 {
7138 }
7145 }
7146 }
7147 }
7148 }
7150 /*+F*************************************************************************
7151 * Function:
7152 * aic7xxx_select_queue_depth
7153 *
7154 * Description:
7155 * Sets the queue depth for each SCSI device hanging off the input
7156 * host adapter. We use a queue depth of 2 for devices that do not
7157 * support tagged queueing. If AIC7XXX_CMDS_PER_LUN is defined, we
7158 * use that for tagged queueing devices; otherwise we use our own
7159 * algorithm for determining the queue depth based on the maximum
7160 * SCBs for the controller.
7161 *-F*************************************************************************/
7162 static void
7165 {
7172 {
7174 {
7177 }
7178 }
7180 {
7181 /*
7182 * Pre-allocate the needed SCBs to get around the possibility of having
7183 * to allocate some when memory is more or less exhausted and we need
7184 * the SCB in order to perform a swap operation (possible deadlock)
7185 */
7188 }
7189 }
7191 /*+F*************************************************************************
7192 * Function:
7193 * aic7xxx_probe
7194 *
7195 * Description:
7196 * Probing for EISA boards: it looks like the first two bytes
7197 * are a manufacturer code - three characters, five bits each:
7198 *
7199 * BYTE 0 BYTE 1 BYTE 2 BYTE 3
7200 * ?1111122 22233333 PPPPPPPP RRRRRRRR
7201 *
7202 * The characters are baselined off ASCII '@', so add that value
7203 * to each to get the real ASCII code for it. The next two bytes
7204 * appear to be a product and revision number, probably vendor-
7205 * specific. This is what is being searched for at each port,
7206 * and what should probably correspond to the ID= field in the
7207 * ECU's .cfg file for the card - if your card is not detected,
7208 * make sure your signature is listed in the array.
7209 *
7210 * The fourth byte's lowest bit seems to be an enabled/disabled
7211 * flag (rest of the bits are reserved?).
7212 *
7213 * NOTE: This function is only needed on Intel and Alpha platforms,
7214 * the other platforms we support don't have EISA/VLB busses. So,
7215 * we #ifdef this entire function to avoid compiler warnings about
7216 * an unused function.
7217 *-F*************************************************************************/
7218 #if defined(__i386__) || defined(__alpha__)
7219 static int
7221 {
7228 ahc_chip type;
7239 };
7241 /*
7242 * The VL-bus cards need to be primed by
7243 * writing before a signature check.
7244 */
7246 {
7249 }
7252 {
7253 /*
7254 * Signature match on enabled card?
7255 */
7257 {
7259 {
7261 {
7263 }
7264 else
7265 {
7267 }
7269 }
7273 }
7274 }
7277 }
7281 /*+F*************************************************************************
7282 * Function:
7283 * read_2840_seeprom
7284 *
7285 * Description:
7286 * Reads the 2840 serial EEPROM and returns 1 if successful and 0 if
7287 * not successful.
7288 *
7289 * See read_seeprom (for the 2940) for the instruction set of the 93C46
7290 * chip.
7291 *
7292 * The 2840 interface to the 93C46 serial EEPROM is through the
7293 * STATUS_2840 and SEECTL_2840 registers. The CS_2840, CK_2840, and
7294 * DO_2840 bits of the SEECTL_2840 register are connected to the chip
7295 * select, clock, and data out lines respectively of the serial EEPROM.
7296 * The DI_2840 bit of the STATUS_2840 is connected to the data in line
7297 * of the serial EEPROM. The EEPROM_TF bit of STATUS_2840 register is
7298 * useful in that it gives us an 800 nsec timer. After a read from the
7299 * SEECTL_2840 register the timing flag is cleared and goes high 800 nsec
7300 * later.
7301 *-F*************************************************************************/
7302 static int
7304 {
7312 };
7315 #define CLOCK_PULSE(p) \
7316 while ((aic_inb(p, STATUS_2840) & EEPROM_TF) == 0) \
7317 { \
7319 } \
7320 (void) aic_inb(p, SEECTL_2840);
7322 /*
7323 * Read the first 32 registers of the seeprom. For the 2840,
7324 * the 93C46 SEEPROM is a 1024-bit device with 64 16-bit registers
7325 * but only the first 32 are used by Adaptec BIOS. The loop
7326 * will range from 0 to 31.
7327 */
7329 {
7330 /*
7331 * Send chip select for one clock cycle.
7332 */
7336 /*
7337 * Now we're ready to send the read command followed by the
7338 * address of the 16-bit register we want to read.
7339 */
7341 {
7348 }
7349 /*
7350 * Send the 6 bit address (MSB first, LSB last).
7351 */
7353 {
7362 }
7364 /*
7365 * Now read the 16 bit register. An initial 0 precedes the
7366 * register contents which begins with bit 15 (MSB) and ends
7367 * with bit 0 (LSB). The initial 0 will be shifted off the
7368 * top of our word as we let the loop run from 0 to 16.
7369 */
7371 {
7379 }
7380 /*
7381 * The serial EEPROM has a checksum in the last word. Keep a
7382 * running checksum for all words read except for the last
7383 * word. We'll verify the checksum after all words have been
7384 * read.
7385 */
7387 {
7389 }
7391 /*
7392 * Reset the chip select for the next command cycle.
7393 */
7400 }
7402 #if 0
7406 {
7408 {
7410 }
7412 }
7414 #endif
7417 {
7420 }
7423 #undef CLOCK_PULSE
7424 }
7426 #define CLOCK_PULSE(p) \
7427 do { \
7428 int limit = 0; \
7429 do { \
7430 mb(); \
7438 } while (((aic_inb(p, SEECTL) & SEERDY) == 0) && (++limit < 1000)); \
7439 } while(0)
7441 /*+F*************************************************************************
7442 * Function:
7443 * acquire_seeprom
7444 *
7445 * Description:
7446 * Acquires access to the memory port on PCI controllers.
7447 *-F*************************************************************************/
7448 static int
7450 {
7452 /*
7453 * Request access of the memory port. When access is
7454 * granted, SEERDY will go high. We use a 1 second
7455 * timeout which should be near 1 second more than
7456 * is needed. Reason: after the 7870 chip reset, there
7457 * should be no contention.
7458 */
7462 {
7465 }
7467 }
7469 /*+F*************************************************************************
7470 * Function:
7471 * release_seeprom
7472 *
7473 * Description:
7474 * Releases access to the memory port on PCI controllers.
7475 *-F*************************************************************************/
7476 static void
7478 {
7479 /*
7480 * Make sure the SEEPROM is ready before we release it.
7481 */
7485 }
7487 /*+F*************************************************************************
7488 * Function:
7489 * read_seeprom
7490 *
7491 * Description:
7492 * Reads the serial EEPROM and returns 1 if successful and 0 if
7493 * not successful.
7494 *
7495 * The instruction set of the 93C46/56/66 chips is as follows:
7496 *
7497 * Start OP
7498 * Function Bit Code Address Data Description
7499 * -------------------------------------------------------------------
7500 * READ 1 10 A5 - A0 Reads data stored in memory,
7501 * starting at specified address
7502 * EWEN 1 00 11XXXX Write enable must precede
7503 * all programming modes
7504 * ERASE 1 11 A5 - A0 Erase register A5A4A3A2A1A0
7505 * WRITE 1 01 A5 - A0 D15 - D0 Writes register
7506 * ERAL 1 00 10XXXX Erase all registers
7507 * WRAL 1 00 01XXXX D15 - D0 Writes to all registers
7508 * EWDS 1 00 00XXXX Disables all programming
7509 * instructions
7510 * *Note: A value of X for address is a don't care condition.
7511 * *Note: The 93C56 and 93C66 have 8 address bits.
7512 *
7513 *
7514 * The 93C46 has a four wire interface: clock, chip select, data in, and
7515 * data out. In order to perform one of the above functions, you need
7516 * to enable the chip select for a clock period (typically a minimum of
7517 * 1 usec, with the clock high and low a minimum of 750 and 250 nsec
7518 * respectively. While the chip select remains high, you can clock in
7519 * the instructions (above) starting with the start bit, followed by the
7520 * OP code, Address, and Data (if needed). For the READ instruction, the
7521 * requested 16-bit register contents is read from the data out line but
7522 * is preceded by an initial zero (leading 0, followed by 16-bits, MSB
7523 * first). The clock cycling from low to high initiates the next data
7524 * bit to be sent from the chip.
7525 *
7526 * The 78xx interface to the 93C46 serial EEPROM is through the SEECTL
7527 * register. After successful arbitration for the memory port, the
7528 * SEECS bit of the SEECTL register is connected to the chip select.
7529 * The SEECK, SEEDO, and SEEDI are connected to the clock, data out,
7530 * and data in lines respectively. The SEERDY bit of SEECTL is useful
7531 * in that it gives us an 800 nsec timer. After a write to the SEECTL
7532 * register, the SEERDY goes high 800 nsec later. The one exception
7533 * to this is when we first request access to the memory port. The
7534 * SEERDY goes high to signify that access has been granted and, for
7535 * this case, has no implied timing.
7536 *-F*************************************************************************/
7537 static int
7540 {
7547 };
7550 /*
7551 * Request access of the memory port.
7552 */
7554 {
7556 }
7558 /*
7559 * Read 'len' registers of the seeprom. For the 7870, the 93C46
7560 * SEEPROM is a 1024-bit device with 64 16-bit registers but only
7561 * the first 32 are used by Adaptec BIOS. Some adapters use the
7562 * 93C56 SEEPROM which is a 2048-bit device. The loop will range
7563 * from 0 to 'len' - 1.
7564 */
7566 {
7567 /*
7568 * Send chip select for one clock cycle.
7569 */
7573 /*
7574 * Now we're ready to send the read command followed by the
7575 * address of the 16-bit register we want to read.
7576 */
7578 {
7585 }
7586 /*
7587 * Send the 6 or 8 bit address (MSB first, LSB last).
7588 */
7590 {
7599 }
7601 /*
7602 * Now read the 16 bit register. An initial 0 precedes the
7603 * register contents which begins with bit 15 (MSB) and ends
7604 * with bit 0 (LSB). The initial 0 will be shifted off the
7605 * top of our word as we let the loop run from 0 to 16.
7606 */
7608 {
7616 }
7618 /*
7619 * The serial EEPROM should have a checksum in the last word.
7620 * Keep a running checksum for all words read except for the
7621 * last word. We'll verify the checksum after all words have
7622 * been read.
7623 */
7625 {
7627 }
7629 /*
7630 * Reset the chip select for the next command cycle.
7631 */
7638 }
7640 /*
7641 * Release access to the memory port and the serial EEPROM.
7642 */
7645 #if 0
7650 {
7652 {
7654 }
7656 }
7658 #endif
7660 {
7662 }
7665 }
7667 /*+F*************************************************************************
7668 * Function:
7669 * read_brdctl
7670 *
7671 * Description:
7672 * Reads the BRDCTL register.
7673 *-F*************************************************************************/
7674 static unsigned char
7676 {
7679 /*
7680 * Make sure the SEEPROM is ready before we access it
7681 */
7684 {
7691 }
7695 {
7697 }
7705 }
7707 /*+F*************************************************************************
7708 * Function:
7709 * write_brdctl
7710 *
7711 * Description:
7712 * Writes a value to the BRDCTL register.
7713 *-F*************************************************************************/
7714 static void
7716 {
7719 /*
7720 * Make sure the SEEPROM is ready before we access it
7721 */
7724 {
7736 }
7737 else
7738 {
7742 {
7744 }
7757 }
7758 }
7760 #undef CLOCK_PULSE
7762 /*+F*************************************************************************
7763 * Function:
7764 * aic785x_cable_detect
7765 *
7766 * Description:
7767 * Detect the cables that are present on aic785x class controller chips
7768 *-F*************************************************************************/
7769 static void
7772 {
7784 }
7786 /*+F*************************************************************************
7787 * Function:
7788 * aic787x_cable_detect
7789 *
7790 * Description:
7791 * Detect the cables that are present on aic787x class controller chips
7792 *
7793 * NOTE: This functions assumes the SEEPROM will have already been aquired
7794 * prior to invocation of this function.
7795 *-F*************************************************************************/
7796 static void
7799 {
7802 /*
7803 * First read the status of our cables. Set the rom bank to
7804 * 0 since the bank setting serves as a multiplexor for the
7805 * cable detection logic. BRDDAT5 controls the bank switch.
7806 */
7809 /*
7810 * Now we read the state of the two internal connectors. BRDDAT6
7811 * is internal 50, BRDDAT7 is internal 68. For each, the cable is
7812 * present if the bit is 0
7813 */
7818 /*
7819 * Set the bank bit in brdctl and then read the external cable state
7820 * and the EEPROM status
7821 */
7828 /*
7829 * We're done, the calling function will release the SEEPROM for us
7830 */
7831 }
7833 /*+F*************************************************************************
7834 * Function:
7835 * aic787x_ultra2_term_detect
7836 *
7837 * Description:
7838 * Detect the termination settings present on ultra2 class controllers
7839 *
7840 * NOTE: This functions assumes the SEEPROM will have already been aquired
7841 * prior to invocation of this function.
7842 *-F*************************************************************************/
7843 static void
7847 {
7857 }
7859 /*+F*************************************************************************
7860 * Function:
7861 * configure_termination
7862 *
7863 * Description:
7864 * Configures the termination settings on PCI adapters that have
7865 * SEEPROMs available.
7866 *-F*************************************************************************/
7867 static void
7869 {
7883 {
7886 else
7892 {
7895 {
7905 }
7906 /* Configure auto termination. */
7909 {
7915 {
7918 }
7920 {
7922 }
7926 }
7928 {
7931 }
7932 else
7933 {
7936 }
7942 {
7944 {
7950 }
7951 else
7952 {
7957 }
7958 }
7963 /*
7964 * Now set the termination based on what we found. BRDDAT6
7965 * controls wide termination enable.
7966 * Flash Enable = BRDDAT7
7967 * SE High Term Enable = BRDDAT6
7968 * SE Low Term Enable = BRDDAT5 (7890)
7969 * LVD High Term Enable = BRDDAT4 (7890)
7970 */
7973 {
7978 /*
7979 * Force termination (low and high byte) on. This is safer than
7980 * leaving it completely off, especially since this message comes
7981 * most often from motherboard controllers that don't even have 3
7982 * connectors, but instead are failing the cable detection.
7983 */
7986 }
7991 {
7997 }
8003 {
8006 else
8012 }
8015 {
8021 }
8024 {
8029 }
8030 }
8031 else
8032 {
8034 {
8037 else
8042 }
8045 {
8050 }
8051 }
8055 }
8056 }
8058 /*+F*************************************************************************
8059 * Function:
8060 * detect_maxscb
8061 *
8062 * Description:
8063 * Detects the maximum number of SCBs for the controller and returns
8064 * the count and a mask in p (p->maxscbs, p->qcntmask).
8065 *-F*************************************************************************/
8066 static void
8068 {
8071 /*
8072 * It's possible that we've already done this for multichannel
8073 * adapters.
8074 */
8076 {
8077 /*
8078 * We haven't initialized the SCB settings yet. Walk the SCBs to
8079 * determince how many there are.
8080 */
8084 {
8101 }
8103 /* Make sure the last SCB terminates the free list. */
8107 /* Ensure we clear the first (0) SCBs control byte. */
8112 /*
8113 * Use direct indexing instead for speed
8114 */
8117 }
8119 }
8121 /*+F*************************************************************************
8122 * Function:
8123 * aic7xxx_register
8124 *
8125 * Description:
8126 * Register a Adaptec aic7xxx chip SCSI controller with the kernel.
8127 *-F*************************************************************************/
8128 static int
8131 {
8151 {
8153 }
8155 {
8157 }
8173 /*
8174 * We currently have no commands of any type
8175 */
8180 {
8190 }
8195 {
8206 }
8208 {
8211 }
8212 else
8213 {
8219 {
8223 {
8225 }
8226 }
8228 {
8230 }
8231 else
8232 {
8234 }
8236 }
8239 /*
8240 * We are starting to do real work on the card....it's possible we could
8241 * generate some spurious interrupts at this point, especially in the
8242 * event of a PCI error or some such. If there are other devices already
8243 * registered on the same interrupt as us, this could cause the machine
8244 * to lock up. So, we disable the interrupt this card is on until we
8245 * finish our card setup. We only need to do this for modules, if we are
8246 * compiled into the kernel then interrupts are already off during this
8247 * part of the code.
8248 */
8249 #ifdef MODULE
8251 #endif
8258 {
8264 }
8266 #ifdef CONFIG_PCI
8267 /*
8268 * Now that we know our instance number, we can set the flags we need to
8269 * force termination if need be.
8270 */
8272 {
8273 /*
8274 * This option only applies to PCI controllers.
8275 */
8277 {
8280 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
8282 #else
8285 #endif
8287 {
8291 }
8292 else
8293 {
8297 }
8298 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
8300 #else
8303 #endif
8304 }
8305 }
8306 #endif
8308 /*
8309 * That took care of devconfig and stpwlev, now for the actual termination
8310 * settings.
8311 */
8313 {
8314 /*
8315 * Again, this only applies to PCI controllers. We don't have problems
8316 * with the termination on 274x controllers to the best of my knowledge.
8317 */
8319 {
8326 {
8328 }
8330 {
8332 }
8334 {
8336 }
8337 }
8338 }
8341 {
8343 {
8345 /*
8346 * Update the settings in sxfrctl1 to match the termination
8347 * settings.
8348 */
8350 }
8352 {
8354 }
8355 }
8357 /*
8358 * Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels
8359 */
8361 {
8362 /* Select channel B */
8367 else
8379 /* Select channel A */
8381 }
8384 {
8386 }
8387 else
8388 {
8390 }
8393 else
8400 /*
8401 * If we are a cardbus adapter then don't enable SCSI reset detection.
8402 * We shouldn't likely be sharing SCSI busses with someone else, and
8403 * if we don't have a cable currently plugged into the controller then
8404 * we won't have a power source for the SCSI termination, which means
8405 * we'll see infinite incoming bus resets.
8406 */
8409 else
8415 /*
8416 * Look at the information that board initialization or the board
8417 * BIOS has left us. In the lower four bits of each target's
8418 * scratch space any value other than 0 indicates that we should
8419 * initiate synchronous transfers. If it's zero, the user or the
8420 * BIOS has decided to disable synchronous negotiation to that
8421 * target so we don't activate the needsdtr flag.
8422 */
8424 {
8426 }
8427 else
8428 {
8430 }
8433 {
8434 /*
8435 * If we reset the bus, then clear the transfer settings, else leave
8436 * them be
8437 */
8439 {
8442 {
8444 }
8448 }
8450 /*
8451 * If we reset the bus, then clear the transfer settings, else leave
8452 * them be.
8453 */
8457 }
8459 /*
8460 * Allocate enough hardware scbs to handle the maximum number of
8461 * concurrent transactions we can have. We have to make sure that
8462 * the allocated memory is contiguous memory. The Linux kmalloc
8463 * routine should only allocate contiguous memory, but note that
8464 * this could be a problem if kmalloc() is changed.
8465 */
8466 {
8472 {
8473 /* pci_alloc_consistent enforces the alignment already and
8474 * clears the area as well.
8475 */
8478 /* We have to use pci_free_consistent, not kfree */
8481 }
8483 {
8487 #ifdef MODULE
8489 #endif
8492 }
8500 /* Set up the fifo areas at the same time */
8503 {
8508 }
8513 {
8517 }
8524 }
8526 /* The Q-FIFOs we just set up are all empty */
8532 {
8537 }
8539 /*
8540 * We don't have any waiting selections or disconnected SCBs.
8541 */
8545 /*
8546 * Message out buffer starts empty
8547 */
8551 /*
8552 * Set all the other asundry items that haven't been set yet.
8553 * This includes just dumping init values to a lot of registers simply
8554 * to make sure they've been touched and are ready for use parity wise
8555 * speaking.
8556 */
8563 /*
8564 * Link us into the list of valid hosts
8565 */
8569 /*
8570 * Allocate the first set of scbs for this controller. This is to stream-
8571 * line code elsewhere in the driver. If we have to check for the existence
8572 * of scbs in certain code sections, it slows things down. However, as
8573 * soon as we register the IRQ for this card, we could get an interrupt that
8574 * includes possibly the SCSI_RSTI interrupt. If we catch that interrupt
8575 * then we are likely to segfault if we don't have at least one chunk of
8576 * SCBs allocated or add checks all through the reset code to make sure
8577 * that the SCBs have been allocated which is an invalid running condition
8578 * and therefore I think it's preferable to simply pre-allocate the first
8579 * chunk of SCBs.
8580 */
8583 /*
8584 * Load the sequencer program, then re-enable the board -
8585 * resetting the AIC-7770 disables it, leaving the lights
8586 * on with nobody home.
8587 */
8590 /*
8591 * Make sure the AUTOFLUSHDIS bit is *not* set in the SBLKCTL register
8592 */
8596 {
8598 }
8601 {
8603 {
8609 }
8610 /* Reset SCSI bus A. */
8615 {
8619 }
8621 }
8625 /*
8626 * Delay for the reset delay by setting the timer, this will delay
8627 * future commands sent to any devices.
8628 */
8631 {
8634 }
8638 }
8639 else
8640 {
8642 {
8647 }
8648 }
8650 /*
8651 * Register IRQ with the kernel. Only allow sharing IRQs with
8652 * PCI devices.
8653 */
8655 {
8657 }
8658 else
8659 {
8663 {
8666 }
8667 }
8669 {
8673 #ifdef MODULE
8675 #endif
8678 }
8685 #ifdef MODULE
8687 #endif
8692 }
8694 /*+F*************************************************************************
8695 * Function:
8696 * aic7xxx_chip_reset
8697 *
8698 * Description:
8699 * Perform a chip reset on the aic7xxx SCSI controller. The controller
8700 * is paused upon return.
8701 *-F*************************************************************************/
8702 int
8704 {
8708 /*
8709 * For some 274x boards, we must clear the CHIPRST bit and pause
8710 * the sequencer. For some reason, this makes the driver work.
8711 */
8714 /*
8715 * In the future, we may call this function as a last resort for
8716 * error handling. Let's be nice and not do any unecessary delays.
8717 */
8720 {
8722 }
8730 {
8744 }
8746 }
8748 /*+F*************************************************************************
8749 * Function:
8750 * aic7xxx_alloc
8751 *
8752 * Description:
8753 * Allocate and initialize a host structure. Returns NULL upon error
8754 * and a pointer to a aic7xxx_host struct upon success.
8755 *-F*************************************************************************/
8758 {
8763 /*
8764 * Allocate a storage area by registering us with the mid-level
8765 * SCSI layer.
8766 */
8770 {
8778 {
8781 }
8782 else
8783 {
8784 /*
8785 * For some reason we don't have enough memory. Free the
8786 * allocated memory for the aic7xxx_host struct, and return NULL.
8787 */
8791 }
8796 {
8801 }
8802 DRIVER_LOCK_INIT
8803 }
8805 }
8807 /*+F*************************************************************************
8808 * Function:
8809 * aic7xxx_free
8810 *
8811 * Description:
8812 * Frees and releases all resources associated with an instance of
8813 * the driver (struct aic7xxx_host *).
8814 *-F*************************************************************************/
8815 static void
8817 {
8820 /*
8821 * Free the allocated hardware SCB space.
8822 */
8824 {
8827 {
8831 }
8832 /*
8833 * Free the driver SCBs. These were allocated on an as-need
8834 * basis. We allocated these in groups depending on how many
8835 * we could fit into a given amount of RAM. The tail SCB for
8836 * these allocations has a pointer to the alloced area.
8837 */
8839 {
8841 {
8847 }
8851 }
8853 /*
8854 * Free the SCB data area.
8855 */
8857 }
8859 /*
8860 * Free any alloced Scsi_Cmnd structures that might be around for
8861 * negotiation purposes....
8862 */
8864 {
8866 {
8868 {
8870 }
8872 }
8873 }
8876 }
8878 /*+F*************************************************************************
8879 * Function:
8880 * aic7xxx_load_seeprom
8881 *
8882 * Description:
8883 * Load the seeprom and configure adapter and target settings.
8884 * Returns 1 if the load was successful and 0 otherwise.
8885 *-F*************************************************************************/
8886 static void
8888 {
8896 {
8898 }
8900 {
8916 {
8920 else
8923 }
8925 {
8930 {
8934 else
8937 }
8938 }
8940 }
8943 {
8945 {
8947 }
8950 {
8956 {
8958 }
8959 }
8961 {
8963 }
8965 {
8969 }
8972 else
8974 }
8975 else
8976 {
8978 {
8980 }
8982 /*
8983 * Note things in our flags
8984 */
8987 /*
8988 * Update the settings in sxfrctl1 to match the termination settings.
8989 */
8992 /*
8993 * Get our SCSI ID from the SEEPROM setting...
8994 */
8997 /*
8998 * First process the settings that are different between the VLB
8999 * and PCI adapter seeproms.
9000 */
9002 {
9003 /* VLB adapter seeproms */
9008 {
9011 }
9012 }
9013 else
9014 {
9015 /* PCI adapter seeproms */
9020 else
9024 {
9027 }
9028 }
9030 }
9034 /*
9035 * Limit to 16 targets just in case. The 2842 for one is known to
9036 * blow the max_targets setting, future cards might also.
9037 */
9041 {
9043 {
9048 {
9051 }
9052 }
9053 }
9056 {
9059 {
9061 {
9062 /*
9063 * OK...the BIOS set things up and left behind the settings we need.
9064 * Just make our sc->device_flags[i] entry match what the card has
9065 * set for this device.
9066 */
9075 {
9077 {
9082 }
9083 }
9084 else
9085 {
9087 {
9092 }
9093 }
9094 }
9095 else
9096 {
9097 /*
9098 * Assume the BIOS has NOT been run on this card and nothing between
9099 * the card and the devices is configured yet.
9100 */
9114 }
9115 }
9117 {
9119 }
9121 {
9123 {
9124 /*
9125 * I know of two different Ultra BIOSes that do this differently.
9126 * One on the Gigabyte 6BXU mb that wants flags[i] & CFXFER to
9127 * be == to 0x03 and SYNCHISULTRA to be true to mean 40MByte/s
9128 * while on the IBM Netfinity 5000 they want the same thing
9129 * to be something else, while flags[i] & CFXFER == 0x03 and
9130 * SYNCHISULTRA false should be 40MByte/s. So, we set both to
9131 * 40MByte/s and the lower speeds be damned. People will have
9132 * to select around the conversely mapped lower speeds in order
9133 * to select lower speeds on these boards.
9134 */
9137 {
9140 }
9142 {
9144 }
9145 }
9149 {
9151 }
9152 }
9154 {
9156 }
9158 {
9168 }
9169 else
9170 {
9172 {
9176 {
9180 {
9184 }
9185 else
9186 {
9188 }
9189 }
9190 else
9191 {
9196 }
9198 AHC_SYNCRATE_ULTRA3);
9201 AHC_SYNCRATE_ULTRA3);
9202 }
9204 {
9212 AHC_SYNCRATE_ULTRA2);
9215 AHC_SYNCRATE_ULTRA2);
9216 }
9217 else
9218 {
9224 {
9229 scsirate,
9231 AHC_SYNCRATE_ULTRA :
9232 AHC_SYNCRATE_FAST);
9236 AHC_SYNCRATE_ULTRA :
9237 AHC_SYNCRATE_FAST);
9238 }
9239 else
9242 }
9244 }
9246 {
9249 }
9250 else
9251 {
9254 }
9258 }
9266 /*
9267 * We set the p->ultraenb from the SEEPROM to begin with, but now we make
9268 * it match what is already down in the card. If we are doing a reset
9269 * on the card then this will get put back to a default state anyway.
9270 * This allows us to not have to pre-emptively negotiate when using the
9271 * no_reset option.
9272 */
9280 {
9285 {
9293 }
9297 }
9298 else
9299 {
9301 }
9303 /*
9304 * Only set the SCSICONF and SCSICONF + 1 registers if we are a PCI card.
9305 * The 2842 and 2742 cards already have these registers set and we don't
9306 * want to muck with them since we don't set all the bits they do.
9307 */
9309 {
9310 /* Set the host ID */
9312 /* In case we are a wide card */
9314 }
9315 }
9317 /*+F*************************************************************************
9318 * Function:
9319 * aic7xxx_detect
9320 *
9321 * Description:
9322 * Try to detect and register an Adaptec 7770 or 7870 SCSI controller.
9323 *
9324 * XXX - This should really be called aic7xxx_probe(). A sequence of
9325 * probe(), attach()/detach(), and init() makes more sense than
9326 * one do-it-all function. This may be useful when (and if) the
9327 * mid-level SCSI code is overhauled.
9328 *-F*************************************************************************/
9329 int
9331 {
9336 #if defined(__i386__) || defined(__alpha__)
9339 #endif
9341 #if defined(__i386__) || defined(__alpha__)
9344 #endif
9346 #ifdef MODULE
9347 /*
9348 * If we are called as a module, the aic7xxx pointer may not be null
9349 * and it would point to our bootup string, just like on the lilo
9350 * command line. IF not NULL, then process this config string with
9351 * aic7xxx_setup
9352 */
9358 "aic7xxx: to see the proper way to specify options to the aic7xxx "
9362 #endif
9368 #ifdef CONFIG_PCI
9369 /*
9370 * PCI-bus probe.
9371 */
9372 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
9374 #else
9376 #endif
9377 {
9378 struct
9379 {
9382 ahc_chip chip;
9383 ahc_flag_type flags;
9384 ahc_feature features;
9536 };
9540 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
9542 #else
9546 #endif
9549 {
9550 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
9554 pdev)))
9555 #else
9560 #endif
9561 {
9563 {
9565 {
9569 }
9570 }
9573 {
9582 /*
9583 * Read sundry information from PCI BIOS.
9584 */
9585 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
9594 {
9598 {
9599 /* duplicate PCI entry, skip it */
9602 }
9604 }
9614 {
9617 }
9618 #ifdef AIC7XXX_STRICT_PCI_SETUP
9621 #else
9623 #endif
9628 #ifdef AIC7XXX_STRICT_PCI_SETUP
9631 {
9633 }
9653 {
9657 {
9658 /* duplicate PCI entry, skip it */
9661 }
9663 }
9674 {
9677 }
9678 #ifdef AIC7XXX_STRICT_PCI_SETUP
9681 #else
9683 #endif
9688 #ifdef AIC7XXX_STRICT_PCI_SETUP
9691 {
9693 }
9700 {
9710 }
9717 {
9727 }
9729 #ifdef MMAPIO
9733 {
9738 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,1,0)
9740 #else
9742 #endif
9744 {
9746 /*
9747 * We need to check the I/O with the MMAPed address. Some machines
9748 * simply fail to work with MMAPed I/O and certain controllers.
9749 */
9751 {
9752 /*
9753 * OK.....we failed our test....go back to programmed I/O
9754 */
9762 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,0)
9764 #else
9766 #endif
9768 }
9769 }
9770 }
9771 #endif
9773 /*
9774 * Lock out other contenders for our i/o space.
9775 */
9778 /*
9779 * We HAVE to make sure the first pause_sequencer() and all other
9780 * subsequent I/O that isn't PCI config space I/O takes place
9781 * after the MMAPed I/O region is configured and tested. The
9782 * problem is the PowerPC architecture that doesn't support
9783 * programmed I/O at all, so we have to have the MMAP I/O set up
9784 * for this pause to even work on those machines.
9785 */
9788 /*
9789 * Clear out any pending PCI error status messages. Also set
9790 * verbose to 0 so that we don't emit strange PCI error messages
9791 * while cleaning out the current status bits.
9792 */
9800 /*
9801 * Remember how the card was setup in case there is no seeprom.
9802 */
9805 else
9807 /*
9808 * Get current termination setting
9809 */
9813 {
9818 }
9819 /*
9820 * Very quickly put the term setting back into the register since
9821 * the chip reset may cause odd things to happen. This is to keep
9822 * LVD busses with lots of drives from draining the power out of
9823 * the diffsense line before we get around to running the
9824 * configure_termination() function. Also restore the STPWLEVEL
9825 * bit of DEVCONFIG
9826 */
9828 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
9831 #else
9833 #endif
9836 /*
9837 * We need to set the CHNL? assignments before loading the SEEPROM
9838 * The 3940 and 3985 cards (original stuff, not any of the later
9839 * stuff) are 7870 and 7880 class chips. The Ultra2 stuff falls
9840 * under 7896 and 7897. The 7895 is in a class by itself :)
9841 */
9843 {
9847 {
9849 {
9861 }
9862 }
9868 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
9870 {
9872 }
9873 /*
9874 * The 7895 is the only chipset that sets the SCBSIZE32 param
9875 * in the DEVCONFIG register. The Ultra2 chipsets use
9876 * the DSCOMMAND0 register instead.
9877 */
9879 {
9883 }
9884 #else
9886 {
9888 }
9889 /*
9890 * The 7895 is the only chipset that sets the SCBSIZE32 param
9891 * in the DEVCONFIG register. The Ultra2 chipsets use
9892 * the DSCOMMAND0 register instead.
9893 */
9895 {
9900 devconfig);
9901 }
9902 #endif
9906 }
9908 /*
9909 * Loading of the SEEPROM needs to come after we've set the flags
9910 * to indicate possible CHNLB and CHNLC assigments. Otherwise,
9911 * on 394x and 398x cards we'll end up reading the wrong settings
9912 * for channels B and C
9913 */
9915 {
9919 /*
9920 * Switch to the alt mode of the chip...
9921 */
9923 /*
9924 * Set our options...the last two items set our CRC after x byte
9925 * count in target mode...
9926 */
9930 /*
9931 * switch back to normal mode...
9932 */
9936 CRCCONTROL1);
9952 /*
9953 * Set the DSCOMMAND0 register on these cards different from
9954 * on the 789x cards. Also, read the SEEPROM as well.
9955 */
9958 DSCOMMAND0);
9959 /* FALLTHROUGH */
9964 /*
9965 * Check the rev of the chipset before we change DSCOMMAND0
9966 */
9967 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
9969 #else
9972 #endif
9974 {
9977 DSCOMMAND0);
9978 }
9981 }
9984 /*
9985 * and then we need another switch based on the type in order to
9986 * make sure the channel B primary flag is set properly on 7895
9987 * controllers....Arrrgggghhh!!! We also have to catch the fact
9988 * that when you disable the BIOS on the 7895 on the Intel DK440LX
9989 * motherboard, and possibly others, it only sets the BIOS disabled
9990 * bit on the A channel...I think I'm starting to lean towards
9991 * going postal....
9992 */
9994 {
10000 {
10004 {
10006 {
10012 }
10013 else
10014 {
10020 }
10021 }
10023 }
10027 }
10029 /*
10030 * We only support external SCB RAM on the 7895/6/7 chipsets.
10031 * We could support it on the 7890/1 easy enough, but I don't
10032 * know of any 7890/1 based cards that have it. I do know
10033 * of 7895/6/7 cards that have it and they work properly.
10034 */
10036 {
10042 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
10044 #else
10047 #endif
10049 {
10052 {
10055 DSCOMMAND0);
10058 }
10060 {
10068 }
10069 }
10070 else
10071 {
10073 {
10077 }
10079 {
10087 }
10088 }
10089 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
10091 #else
10093 devconfig);
10094 #endif
10099 }
10101 /*
10102 * Take the LED out of diagnostic mode
10103 */
10106 SBLKCTL);
10108 /*
10109 * We don't know where this is set in the SEEPROM or by the
10110 * BIOS, so we default to 100%. On Ultra2 controllers, use 75%
10111 * instead.
10112 */
10114 {
10116 }
10117 else
10118 {
10120 }
10123 {
10125 }
10126 else
10127 {
10132 }
10134 found++;
10137 {
10142 }
10146 #endif CONFIG_PCI
10148 #if defined(__i386__) || defined(__alpha__)
10149 /*
10150 * EISA/VL-bus card signature probe.
10151 */
10155 {
10159 {
10160 /*
10161 * Some other driver has staked a
10162 * claim to this i/o region already.
10163 */
10164 slot++;
10166 }
10170 {
10171 slot++;
10173 }
10176 {
10178 slot++;
10180 }
10181 /*
10182 * Lock out other contenders for our i/o space.
10183 */
10186 /*
10187 * Pause the card preserving the IRQ type. Allow the operator
10188 * to override the IRQ trigger.
10189 */
10194 else
10208 else
10213 {
10227 slot++;
10229 }
10231 /*
10232 * We are commited now, everything has been checked and this card
10233 * has been found, now we just set it up
10234 */
10236 /*
10237 * Insert our new struct into the list at the end
10238 */
10240 {
10242 }
10243 else
10244 {
10249 }
10252 {
10258 /* FALLTHROUGH */
10260 {
10265 /*
10266 * Get the primary channel information. Right now we don't
10267 * do anything with this, but someday we will be able to inform
10268 * the mid-level SCSI code which channel is primary.
10269 */
10271 {
10276 }
10278 {
10280 }
10283 {
10285 }
10286 else
10287 {
10291 {
10294 }
10295 else
10296 {
10299 }
10300 }
10304 {
10307 }
10308 else
10309 {
10312 }
10315 }
10323 else
10333 {
10348 }
10353 }
10355 {
10362 }
10364 /*
10365 * Set the FIFO threshold and the bus off time.
10366 */
10370 slot++;
10371 found++;
10372 }
10376 /*
10377 * Now, we re-order the probed devices by BIOS address and BUS class.
10378 * In general, we follow this algorithm to make the adapters show up
10379 * in the same order under linux that the computer finds them.
10380 * 1: All VLB/EISA cards with BIOS_ENABLED first, according to BIOS
10381 * address, going from lowest to highest.
10382 * 2: All PCI controllers with BIOS_ENABLED next, according to BIOS
10383 * address, going from lowest to highest.
10384 * 3: Remaining VLB/EISA controllers going in slot order.
10385 * 4: Remaining PCI controllers, going in PCI device order (reversable)
10386 */
10388 {
10399 {
10401 {
10404 {
10408 else
10412 {
10416 }
10417 else
10418 {
10423 {
10426 }
10428 {
10432 }
10433 else
10434 {
10438 }
10439 }
10443 else
10447 }
10449 {
10454 else
10458 {
10462 }
10463 else
10464 {
10468 {
10474 {
10477 }
10478 }
10479 else
10480 {
10486 {
10489 }
10490 }
10491 /*
10492 * Are we dealing with a 7895/6/7/9 where we need to sort the
10493 * channels as well, if so, the bios_address values should
10494 * be the same
10495 */
10500 {
10502 {
10504 {
10507 }
10508 }
10509 else
10510 {
10512 {
10515 }
10516 }
10517 }
10519 {
10523 }
10524 else
10525 {
10529 }
10530 }
10534 else
10538 }
10541 /*
10542 * At this point, the cards have been broken into 4 sorted lists, now
10543 * we run through the lists in order and register each controller
10544 */
10545 {
10550 {
10553 {
10557 {
10560 {
10561 found--;
10564 }
10566 {
10571 }
10572 }
10576 }
10577 }
10578 }
10579 }
10581 }
10586 /*+F*************************************************************************
10587 * Function:
10588 * aic7xxx_allocate_negotiation_command
10589 *
10590 * Description:
10591 * allocate the actual command struct and fill in the gaps...
10592 *-F*************************************************************************/
10596 {
10601 {
10603 }
10605 {
10609 }
10631 }
10633 /*+F*************************************************************************
10634 * Function:
10635 * aic7xxx_negotiation_complete
10636 *
10637 * Description:
10638 * Handle completion events for our Negotiation commands. Clear out the
10639 * struct and get it ready for its next use.
10640 *-F*************************************************************************/
10641 static void
10643 {
10651 /*
10652 * perform our minimalistic domain validation
10653 */
10655 {
10659 {
10661 }
10664 {
10669 {
10670 /*
10671 * oops, we had a failure, lower the transfer rate and try again. It's
10672 * worth noting here that it might be wise to also check for typical
10673 * wide setting on narrow cable type problems and try disabling wide
10674 * instead of slowing down if those exist. That's hard to do with simple
10675 * checksums though.
10676 */
10678 {
10681 }
10683 {
10684 syncrate++;
10687 {
10690 {
10692 }
10693 }
10694 else
10695 {
10699 }
10703 }
10705 }
10706 else
10707 {
10709 {
10712 }
10713 /*
10714 * Update the checksum in case the INQUIRY data has changed, maybe
10715 * in relation to a change in the mode pages, or whatever.
10716 */
10718 /*
10719 * Signal that we are trying out the domain validation
10720 */
10722 /*
10723 * Signal that we need to re-negotiate things, this also gets us our
10724 * INQUIRY command to re-checksum off of.
10725 */
10729 }
10730 }
10731 else
10732 {
10735 {
10738 }
10739 /*
10740 * We successfully did our checksum, so don't leave the needdv flag set
10741 * in case we might have set it last time through.
10742 */
10744 }
10745 }
10748 /*
10749 * This looks recursive in the extreme, but if this was a WDTR negotiation
10750 * and we didn't follow up with SDTR yet, then this will get it started.
10751 * For all other cases, this should work out to be a no-op, unless we are
10752 * doing domain validation and happen to need a new negotiation command.
10753 */
10756 }
10758 /*+F*************************************************************************
10759 * Function:
10760 * aic7xxx_build_negotiation_command
10761 *
10762 * Description:
10763 * Build a Scsi_Cmnd structure to perform negotiation with or else send
10764 * a pre-built command specifically for this purpose.
10765 *-F*************************************************************************/
10766 static void
10769 {
10775 {
10778 {
10780 }
10781 /*
10782 * Before sending this thing out, we also make the cmd->next pointer
10783 * point to the real command so we can stuff any possible SENSE data
10784 * into the real command instead of this fake command. This has to be
10785 * done each time the command is built, not just the first time, hence
10786 * it's outside of the above if()...
10787 */
10789 /*
10790 * Clear the buffer so checksums come out right....
10791 */
10794 /*
10795 * Remove any commands for this particular device that might be on the
10796 * waiting_scbs queue or qinfifo so that this command goes out first.
10797 * This is vital for our implementation of domain validation.
10798 */
10803 {
10808 {
10811 {
10816 }
10817 else
10818 {
10820 }
10821 }
10822 }
10824 aic7xxx_negotiation_complete);
10825 }
10826 }
10828 #ifdef AIC7XXX_VERBOSE_DEBUGGING
10829 /*+F*************************************************************************
10830 * Function:
10831 * aic7xxx_print_scb
10832 *
10833 * Description:
10834 * Dump the byte codes for an about to be sent SCB.
10835 *-F*************************************************************************/
10836 static void
10838 {
10845 {
10847 }
10849 }
10850 #endif
10852 /*+F*************************************************************************
10853 * Function:
10854 * aic7xxx_buildscb
10855 *
10856 * Description:
10857 * Build a SCB.
10858 *-F*************************************************************************/
10859 static void
10862 {
10870 /*
10871 * Setup the control byte if we need negotiation and have not
10872 * already requested it.
10873 */
10877 {
10881 {
10885 {
10888 }
10889 else
10890 {
10892 {
10895 }
10896 else
10897 {
10900 }
10902 }
10903 }
10904 }
10906 {
10910 {
10914 {
10916 }
10918 {
10920 }
10922 {
10924 }
10925 }
10926 }
10931 {
10933 }
10937 /*
10938 * The interpretation of request_buffer and request_bufflen
10939 * changes depending on whether or not use_sg is zero; a
10940 * non-zero use_sg indicates the number of elements in the
10941 * scatter-gather array.
10942 */
10944 /*
10945 * XXX - this relies on the host data being stored in a
10946 * little-endian format.
10947 */
10953 {
10956 /*
10957 * We must build an SG list in adapter format, as the kernel's SG list
10958 * cannot be used directly because of data field size (__alpha__)
10959 * differences and the kernel SG list uses virtual addresses where
10960 * we need physical addresses.
10961 */
10967 /*
10968 * Copy the segments into the SG array. NOTE!!! - We used to
10969 * have the first entry both in the data_pointer area and the first
10970 * SG element. That has changed somewhat. We still have the first
10971 * entry in both places, but now we download the address of
10972 * scb->sg_list[1] instead of 0 to the sg pointer in the hscb.
10973 */
10975 {
10980 }
10981 /* Copy the first SG into the data pointer area. */
10987 }
10988 else
10989 {
10991 {
11004 }
11005 else
11006 {
11013 }
11014 }
11015 }
11017 /*+F*************************************************************************
11018 * Function:
11019 * aic7xxx_queue
11020 *
11021 * Description:
11022 * Queue a SCB to the controller.
11023 *-F*************************************************************************/
11024 int
11026 {
11029 #ifdef AIC7XXX_VERBOSE_DEBUGGING
11031 #endif
11032 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
11034 #endif
11037 /*
11038 * Check to see if channel was scanned.
11039 */
11041 #ifdef AIC7XXX_VERBOSE_DEBUGGING
11043 {
11048 }
11049 else
11050 {
11052 {
11057 }
11058 }
11061 {
11068 }
11069 #endif
11073 {
11074 DRIVER_LOCK
11076 DRIVER_UNLOCK
11078 }
11080 {
11084 DRIVER_LOCK
11086 DRIVER_UNLOCK
11088 }
11089 else
11090 {
11094 /*
11095 * Construct the SCB beforehand, so the sequencer is
11096 * paused a minimal amount of time.
11097 */
11100 /*
11101 * Make sure the Scsi_Cmnd pointer is saved, the struct it points to
11102 * is set up properly, and the parity error flag is reset, then send
11103 * the SCB to the sequencer and watch the fun begin.
11104 */
11114 DRIVER_LOCK
11117 {
11119 }
11120 DRIVER_UNLOCK
11121 }
11123 }
11125 /*+F*************************************************************************
11126 * Function:
11127 * aic7xxx_bus_device_reset
11128 *
11129 * Description:
11130 * Abort or reset the current SCSI command(s). If the scb has not
11131 * previously been aborted, then we attempt to send a BUS_DEVICE_RESET
11132 * message to the target. If the scb has previously been unsuccessfully
11133 * aborted, then we will reset the channel and have all devices renegotiate.
11134 * Returns an enumerated type that indicates the status of the operation.
11135 *-F*************************************************************************/
11136 static int
11138 {
11152 {
11156 {
11176 /*
11177 * We're not in a valid phase, so assume we're idle.
11178 */
11181 }
11187 }
11191 /*
11192 * Send a Device Reset Message:
11193 * The target that is holding up the bus may not be the same as
11194 * the one that triggered this timeout (different commands have
11195 * different timeout lengths). Our strategy here is to queue an
11196 * abort message to the timed out target if it is disconnected.
11197 * Otherwise, if we have an active target we stuff the message buffer
11198 * with an abort message and assert ATN in the hopes that the target
11199 * will let go of the bus and go to the mesgout phase. If this
11200 * fails, we'll get another timeout a few seconds later which will
11201 * attempt a bus reset.
11202 */
11207 {
11209 {
11214 }
11216 {
11218 {
11225 BUS_DEVICE_RESET_PENDING;
11226 /* Send the abort message to the active SCB. */
11230 }
11231 else
11232 {
11233 /* We want to send out the message, but it could screw an already */
11234 /* in place and being used message. Instead, we return an error */
11235 /* to try and start the bus reset phase since this command is */
11236 /* probably hung (aborts failed, and now reset is failing). We */
11237 /* also make sure to set BUS_DEVICE_RESET_PENDING so we won't try */
11238 /* any more on this device, but instead will escalate to a bus or */
11239 /* host reset (additionally, we won't try to abort any more). */
11245 BUS_DEVICE_RESET_PENDING;
11247 }
11248 }
11252 {
11254 }
11255 else
11256 {
11259 {
11261 }
11262 }
11264 {
11265 /*
11266 * Simply set the MK_MESSAGE flag and the SEQINT handler will do
11267 * the rest on a reconnect.
11268 */
11272 BUS_DEVICE_RESET_PENDING;
11274 {
11280 }
11281 /*
11282 * Actually requeue this SCB in case we can select the
11283 * device before it reconnects. If the transaction we
11284 * want to abort is not tagged, then this will be the only
11285 * outstanding command and we can simply shove it on the
11286 * qoutfifo and be done. If it is tagged, then it goes right
11287 * in with all the others, no problem :) We need to add it
11288 * to the qinfifo and let the sequencer know it is there.
11289 * Now, the only problem left to deal with is, *IF* this
11290 * command completes, in spite of the MK_MESSAGE bit in the
11291 * control byte, then we need to pick that up in the interrupt
11292 * routine and clean things up. This *shouldn't* ever happen.
11293 */
11300 else
11304 }
11306 {
11308 }
11311 }
11314 /*+F*************************************************************************
11315 * Function:
11316 * aic7xxx_panic_abort
11317 *
11318 * Description:
11319 * Abort the current SCSI command(s).
11320 *-F*************************************************************************/
11321 void
11323 {
11324 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
11330 #endif
11333 UTS_RELEASE);
11343 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
11345 {
11347 {
11366 }
11367 }
11368 /*
11369 * Search for this command and see if we can't track it down, it's the
11370 * one causing the timeout. Print out this command first, then all other
11371 * active commands afterwords.
11372 */
11375 {
11378 {
11385 }
11386 }
11390 {
11394 }
11402 {
11407 }
11412 {
11417 }
11422 {
11426 }
11430 {
11431 /*
11432 * We haven't found the offending SCB yet, and it should be around
11433 * somewhere, so go look for it in the cards SCBs.
11434 */
11437 {
11442 }
11443 }
11447 {
11450 {
11454 }
11455 }
11456 #endif
11459 }
11461 /*+F*************************************************************************
11462 * Function:
11463 * aic7xxx_abort
11464 *
11465 * Description:
11466 * Abort the current SCSI command(s).
11467 *-F*************************************************************************/
11468 int
11470 {
11475 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
11477 #endif
11483 /*
11484 * I added a new config option to the driver: "panic_on_abort" that will
11485 * cause the driver to panic and the machine to stop on the first abort
11486 * or reset call into the driver. At that point, it prints out a lot of
11487 * usefull information for me which I can then use to try and debug the
11488 * problem. Simply enable the boot time prompt in order to activate this
11489 * code.
11490 */
11494 DRIVER_LOCK
11496 /*
11497 * Run the isr to grab any command in the QOUTFIFO and any other misc.
11498 * assundry tasks. This should also set up the bh handler if there is
11499 * anything to be done, but it won't run until we are done here since
11500 * we are following a straight code path without entering the scheduler
11501 * code.
11502 */
11506 {
11510 }
11513 /* Totally bogus cmd since it points beyond our */
11515 /* timeout serial number. */
11520 DRIVER_UNLOCK
11522 }
11525 /* has already been recycled for another command */
11526 /* Either way, this SCB has nothing to do with this*/
11527 /* command and we need to deal with cmd without */
11528 /* touching the SCB. */
11529 /* The theory here is to return a value that will */
11530 /* make the queued for complete command actually */
11531 /* finish successfully, or to indicate that we */
11532 /* don't have this cmd any more and the mid level */
11533 /* code needs to find it. */
11537 {
11539 {
11545 else
11549 DRIVER_UNLOCK
11551 * completion */
11552 }
11555 }
11560 DRIVER_UNLOCK
11562 }
11564 /* At this point we know the following:
11565 * the SCB pointer is valid
11566 * the command pointer passed in to us and the scb->cmd pointer match
11567 * this then means that the command we need to abort is the same as the
11568 * command held by the scb pointer and is a valid abort request.
11569 * Now, we just have to figure out what to do from here. Current plan is:
11570 * if we have already been here on this command, escalate to a reset
11571 * if scb is on waiting list or QINFIFO, send it back as aborted, but
11572 * we also need to be aware of the possibility that we could be using
11573 * a faked negotiation command that is holding this command up, if
11574 * so we need to take care of that command instead, which means we
11575 * would then treat this one like it was sitting around disconnected
11576 * instead.
11577 * if scb is on WAITING_SCB list in sequencer, free scb and send back
11578 * if scb is disconnected and not completed, abort with abort message
11579 * if scb is currently running, then it may be causing the bus to hang
11580 * so we want a return value that indicates a reset would be appropriate
11581 * if the command does not finish shortly
11582 * if scb is already complete but not on completeq, we're screwed because
11583 * this can't happen (except if the command is in the QOUTFIFO, in which
11584 * case we would like it to complete successfully instead of having to
11585 * to be re-done)
11586 * All other scenarios already dealt with by previous code.
11587 */
11590 {
11595 DRIVER_UNLOCK
11597 }
11600 BUS_DEVICE_RESET_PENDING) )
11601 {
11606 DRIVER_UNLOCK
11608 }
11616 /*
11617 * First, let's check to see if the currently running command is our target
11618 * since if it is, the return is fairly easy and quick since we don't want
11619 * to touch the command in case it might complete, but we do want a timeout
11620 * in case it's actually hung, so we really do nothing, but tell the mid
11621 * level code to reset the timeout.
11622 */
11625 {
11626 /*
11627 * Check to see if the sequencer is just sitting on this command, or
11628 * if it's actively being run.
11629 */
11632 {
11646 DRIVER_UNLOCK /* muck with other SCBs if this */
11651 }
11652 }
11655 {
11662 {
11665 else
11667 }
11668 else
11669 {
11671 }
11673 {
11674 /*
11675 * OK..this means the command we are currently getting an abort
11676 * for has an outstanding negotiation command in front of it.
11677 * We don't really have a way to tie back into the negotiation
11678 * commands, so we just send this back as pending, then it
11679 * will get reset in 2 seconds.
11680 */
11683 DRIVER_UNLOCK
11685 }
11696 }
11698 /*
11699 * We just checked the waiting_q, now for the QINFIFO
11700 */
11702 {
11710 }
11712 /*
11713 * QINFIFO, waitingq, completeq done. Next, check WAITING_SCB list in card
11714 */
11717 {
11723 {
11726 {
11732 {
11734 /* stop the selection since we just
11735 * grabbed the scb out from under the
11736 * card
11737 */
11740 }
11741 else
11742 {
11747 }
11753 }
11756 }
11758 }
11760 /*
11761 * Hmmm...completeq, QOUTFIFO, QINFIFO, WAITING_SCBH, waitingq all checked.
11762 * OK...the sequencer's paused, interrupts are off, and we haven't found the
11763 * command anyplace where it could be easily aborted. Time for the hard
11764 * work. We also know the command is valid. This essentially means the
11765 * command is disconnected, or connected but not into any phases yet, which
11766 * we know due to the tests we ran earlier on the current active scb phase.
11767 * At this point we can queue the abort tag and go on with life.
11768 */
11771 {
11777 {
11783 }
11790 else
11792 }
11794 {
11797 }
11800 DRIVER_UNLOCK
11802 /*
11803 * On the return value. If we found the command and aborted it, then we know
11804 * it's already sent back and there is no reason for a further timeout, so
11805 * we use SCSI_ABORT_SUCCESS. On the queued abort side, we aren't so certain
11806 * there hasn't been a bus hang or something that might keep the abort from
11807 * from completing. Therefore, we use SCSI_ABORT_PENDING. The first time this
11808 * is passed back, the timeout on the command gets extended, the second time
11809 * we pass this back, the mid level SCSI code calls our reset function, which
11810 * would shake loose a hung bus.
11811 */
11814 else
11816 }
11819 /*+F*************************************************************************
11820 * Function:
11821 * aic7xxx_reset
11822 *
11823 * Description:
11824 * Resetting the bus always succeeds - is has to, otherwise the
11825 * kernel will panic! Try a surgical technique - sending a BUS
11826 * DEVICE RESET message - on the offending target before pulling
11827 * the SCSI bus reset line.
11828 *-F*************************************************************************/
11829 int
11831 {
11836 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,95)
11838 #endif
11839 #define DEVICE_RESET 0x01
11840 #define BUS_RESET 0x02
11841 #define HOST_RESET 0x04
11842 #define FAIL 0x08
11843 #define RESET_DELAY 0x10
11849 {
11853 }
11859 /*
11860 * I added a new config option to the driver: "panic_on_abort" that will
11861 * cause the driver to panic and the machine to stop on the first abort
11862 * or reset call into the driver. At that point, it prints out a lot of
11863 * usefull information for me which I can then use to try and debug the
11864 * problem. Simply enable the boot time prompt in order to activate this
11865 * code.
11866 */
11870 DRIVER_LOCK
11874 {
11878 }
11881 {
11886 {
11888 }
11889 else
11890 {
11892 }
11893 }
11895 {
11902 {
11904 {
11909 DRIVER_UNLOCK
11911 }
11914 }
11916 {
11921 DRIVER_UNLOCK
11923 }
11924 else
11925 {
11931 }
11932 }
11933 else
11934 {
11939 {
11950 DRIVER_UNLOCK
11952 }
11954 {
11956 }
11958 {
11960 }
11961 else
11962 {
11964 }
11965 }
11968 {
11973 }
11976 {
11978 {
11983 }
11985 }
11988 {
11993 }
11995 {
11997 }
12000 {
12002 {
12007 }
12009 }
12012 {
12017 }
12018 /*
12019 * By this point, we want to already know what we are going to do and
12020 * only have the following code implement our course of action.
12021 */
12023 {
12026 DRIVER_UNLOCK
12031 DRIVER_UNLOCK
12038 /* We can't rely on run_waiting_queues to unpause the sequencer for
12039 * PCI based controllers since we use AAP */
12043 DRIVER_UNLOCK
12054 {
12057 }
12060 {
12063 }
12066 else
12067 {
12070 SIMODE1);
12076 }
12078 /*
12079 * If this a SCSI_RESET_SYNCHRONOUS then the command we were given is
12080 * in need of being re-started, so send it on through to aic7xxx_queue
12081 * and let it set until the delay is over. This keeps it from dying
12082 * entirely and avoids getting a bogus dead command back through the
12083 * mid-level code due to too many retries.
12084 */
12085 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,132)
12087 {
12090 }
12091 #endif
12093 /*
12094 * We can't rely on run_waiting_queues to unpause the sequencer for
12095 * PCI based controllers since we use AAP. NOTE: this also sets
12096 * the timer for the one command we might have queued in the case
12097 * of a synch reset.
12098 */
12101 DRIVER_UNLOCK
12104 }
12105 }
12107 /*+F*************************************************************************
12108 * Function:
12109 * aic7xxx_biosparam
12110 *
12111 * Description:
12112 * Return the disk geometry for the given SCSI device.
12113 *-F*************************************************************************/
12114 int
12116 {
12125 {
12130 }
12137 {
12141 }
12148 }
12150 /*+F*************************************************************************
12151 * Function:
12152 * aic7xxx_release
12153 *
12154 * Description:
12155 * Free the passed in Scsi_Host memory structures prior to unloading the
12156 * module.
12157 *-F*************************************************************************/
12158 int
12160 {
12167 #ifdef MMAPIO
12169 {
12170 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,1,0)
12172 #else
12174 #endif
12175 }
12180 {
12182 {
12185 else
12187 }
12188 else
12189 {
12191 }
12193 }
12196 }
12198 /*+F*************************************************************************
12199 * Function:
12200 * aic7xxx_print_card
12201 *
12202 * Description:
12203 * Print out all of the control registers on the card
12204 *
12205 * NOTE: This function is not yet safe for use on the VLB and EISA
12206 * controllers, so it isn't used on those controllers at all.
12207 *-F*************************************************************************/
12208 static void
12210 {
12244 };
12245 #ifdef CONFIG_PCI
12264 };
12265 #endif
12267 /*
12268 * Let's run through the PCI space first....
12269 */
12273 {
12285 }
12287 #ifdef CONFIG_PCI
12288 {
12294 {
12297 j++)
12298 {
12299 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,1,92)
12301 #else
12303 #endif
12306 {
12309 }
12310 }
12311 }
12312 }
12317 /*
12318 * Now the registers on the card....
12319 */
12323 {
12326 j++)
12327 {
12330 {
12333 }
12334 }
12335 }
12339 {
12345 {
12349 else
12351 }
12352 }
12354 /*
12355 * If this was an Ultra2 controller, then we just hosed the card in terms
12356 * of the QUEUE REGS. This function is only called at init time or by
12357 * the panic_abort function, so it's safe to assume a generic init time
12358 * setting here
12359 */
12362 {
12366 }
12368 }
12370 /*+F*************************************************************************
12371 * Function:
12372 * aic7xxx_print_scratch_ram
12373 *
12374 * Description:
12375 * Print out the scratch RAM values on the card.
12376 *-F*************************************************************************/
12377 static void
12379 {
12385 {
12388 {
12391 }
12392 }
12394 {
12396 {
12399 {
12402 }
12403 }
12404 }
12406 }
12411 #ifdef MODULE
12412 /* Eventually this will go into an include file, but this will be later */
12416 #endif
12418 /*
12419 * Overrides for Emacs so that we almost follow Linus's tabbing style.
12420 * Emacs will notice this stuff at the end of the file and automatically
12421 * adjust the settings for this buffer only. This must remain at the end
12422 * of the file.
12423 * ---------------------------------------------------------------------------
12424 * Local variables:
12425 * c-indent-level: 2
12426 * c-brace-imaginary-offset: 0
12427 * c-brace-offset: -2
12428 * c-argdecl-indent: 2
12429 * c-label-offset: -2
12430 * c-continued-statement-offset: 2
12431 * c-continued-brace-offset: 0
12432 * indent-tabs-mode: nil
12433 * tab-width: 8
12434 * End:
12435 */