File: /usr/src/linux/drivers/scsi/aic7xxx/aic7xxx_linux.c
1 /*
2 * Adaptec AIC7xxx device driver for Linux.
3 *
4 * $Id: //depot/src/linux/drivers/scsi/aic7xxx/aic7xxx_linux.c#72 $
5 *
6 * Copyright (c) 1994 John Aycock
7 * The University of Calgary Department of Computer Science.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, write to
21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
24 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
25 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
26 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
27 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
28 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
29 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
30 * ANSI SCSI-2 specification (draft 10c), ...
31 *
32 * --------------------------------------------------------------------------
33 *
34 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
35 *
36 * Substantially modified to include support for wide and twin bus
37 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
38 * SCB paging, and other rework of the code.
39 *
40 * --------------------------------------------------------------------------
41 * Copyright (c) 1994, 1995, 1996, 1997, 1998, 1999, 2000 Justin T. Gibbs.
42 * Copyright (c) 2000 Adaptec Inc.
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.
51 * 2. The name of the author may not be used to endorse or promote products
52 * derived from this software without specific prior written permission.
53 *
54 * Alternatively, this software may be distributed under the terms of the
55 * GNU General Public License ("GPL").
56 *
57 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
60 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
61 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
67 * SUCH DAMAGE.
68 *
69 *---------------------------------------------------------------------------
70 *
71 * Thanks also go to (in alphabetical order) the following:
72 *
73 * Rory Bolt - Sequencer bug fixes
74 * Jay Estabrook - Initial DEC Alpha support
75 * Doug Ledford - Much needed abort/reset bug fixes
76 * Kai Makisara - DMAing of SCBs
77 *
78 * A Boot time option was also added for not resetting the scsi bus.
79 *
80 * Form: aic7xxx=extended
81 * aic7xxx=no_reset
82 * aic7xxx=ultra
83 * aic7xxx=irq_trigger:[0,1] # 0 edge, 1 level
84 * aic7xxx=verbose
85 *
86 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
87 *
88 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
89 */
90
91 /*
92 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
93 *
94 * Copyright (c) 1997-1999 Doug Ledford
95 *
96 * These changes are released under the same licensing terms as the FreeBSD
97 * driver written by Justin Gibbs. Please see his Copyright notice above
98 * for the exact terms and conditions covering my changes as well as the
99 * warranty statement.
100 *
101 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
102 * but are not limited to:
103 *
104 * 1: Import of the latest FreeBSD sequencer code for this driver
105 * 2: Modification of kernel code to accomodate different sequencer semantics
106 * 3: Extensive changes throughout kernel portion of driver to improve
107 * abort/reset processing and error hanndling
108 * 4: Other work contributed by various people on the Internet
109 * 5: Changes to printk information and verbosity selection code
110 * 6: General reliability related changes, especially in IRQ management
111 * 7: Modifications to the default probe/attach order for supported cards
112 * 8: SMP friendliness has been improved
113 *
114 */
115
116 /*
117 * The next three defines are user configurable. These should be the only
118 * defines a user might need to get in here and change. There are other
119 * defines buried deeper in the code, but those really shouldn't need touched
120 * under normal conditions.
121 */
122
123 #if defined(MODULE)
124 #include <linux/module.h>
125 #endif
126
127 #include "aic7xxx_osm.h"
128 #include "aic7xxx_inline.h"
129
130 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
131 #include <linux/init.h> /* __setup */
132 #endif
133
134 #include "../sd.h" /* For geometry detection */
135
136 #include <linux/mm.h> /* For fetching system memory size */
137
138 /*
139 * To generate the correct addresses for the controller to issue
140 * on the bus. Originally added for DEC Alpha support.
141 */
142 #define VIRT_TO_BUS(a) (uint32_t)virt_to_bus((void *)(a))
143
144 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)
145 struct proc_dir_entry proc_scsi_aic7xxx = {
146 PROC_SCSI_AIC7XXX, 7, "aic7xxx",
147 S_IFDIR | S_IRUGO | S_IXUGO, 2,
148 0, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL
149 };
150 #endif
151
152 /*
153 * Set this to the delay in seconds after SCSI bus reset.
154 * Note, we honor this only for the initial bus reset.
155 * The scsi error recovery code performs its own bus settle
156 * delay handling for error recovery actions.
157 */
158 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
159 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
160 #else
161 #define AIC7XXX_RESET_DELAY 5000
162 #endif
163
164 /*
165 * Control collection of SCSI transfer statistics for the /proc filesystem.
166 *
167 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
168 * NOTE: This does affect performance since it has to maintain statistics.
169 */
170 #ifdef CONFIG_AIC7XXX_PROC_STATS
171 #define AIC7XXX_PROC_STATS
172 #endif
173
174 /*
175 * To change the default number of tagged transactions allowed per-device,
176 * add a line to the lilo.conf file like:
177 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
178 * which will result in the first four devices on the first two
179 * controllers being set to a tagged queue depth of 32.
180 *
181 * The tag_commands is an array of 16 to allow for wide and twin adapters.
182 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
183 * for channel 1.
184 */
185 typedef struct {
186 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
187 } adapter_tag_info_t;
188
189 /*
190 * Modify this as you see fit for your system.
191 *
192 * 0 tagged queuing disabled
193 * 1 <= n <= 253 n == max tags ever dispatched.
194 *
195 * The driver will throttle the number of commands dispatched to a
196 * device if it returns queue full. For devices with a fixed maximum
197 * queue depth, the driver will eventually determine this depth and
198 * lock it in (a console message is printed to indicate that a lock
199 * has occurred). On some devices, queue full is returned for a temporary
200 * resource shortage. These devices will return queue full at varying
201 * depths. The driver will throttle back when the queue fulls occur and
202 * attempt to slowly increase the depth over time as the device recovers
203 * from the resource shortage.
204 *
205 * In this example, the first line will disable tagged queueing for all
206 * the devices on the first probed aic7xxx adapter.
207 *
208 * The second line enables tagged queueing with 4 commands/LUN for IDs
209 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
210 * driver to attempt to use up to 64 tags for ID 1.
211 *
212 * The third line is the same as the first line.
213 *
214 * The fourth line disables tagged queueing for devices 0 and 3. It
215 * enables tagged queueing for the other IDs, with 16 commands/LUN
216 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
217 * IDs 2, 5-7, and 9-15.
218 */
219
220 /*
221 * NOTE: The below structure is for reference only, the actual structure
222 * to modify in order to change things is just below this comment block.
223 adapter_tag_info_t aic7xxx_tag_info[] =
224 {
225 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
226 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
227 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
228 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
229 };
230 */
231
232 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
233 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
234 #else
235 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
236 #endif
237
238 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
239 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
240 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
241 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
242 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
243 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
244 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
245 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
246 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
247 }
248
249 /*
250 * By default, use the number of commands specified by
251 * the users kernel configuration.
252 */
253 static adapter_tag_info_t aic7xxx_tag_info[] =
254 {
255 {AIC7XXX_CONFIGED_TAG_COMMANDS},
256 {AIC7XXX_CONFIGED_TAG_COMMANDS},
257 {AIC7XXX_CONFIGED_TAG_COMMANDS},
258 {AIC7XXX_CONFIGED_TAG_COMMANDS},
259 {AIC7XXX_CONFIGED_TAG_COMMANDS},
260 {AIC7XXX_CONFIGED_TAG_COMMANDS},
261 {AIC7XXX_CONFIGED_TAG_COMMANDS},
262 {AIC7XXX_CONFIGED_TAG_COMMANDS},
263 {AIC7XXX_CONFIGED_TAG_COMMANDS},
264 {AIC7XXX_CONFIGED_TAG_COMMANDS},
265 {AIC7XXX_CONFIGED_TAG_COMMANDS},
266 {AIC7XXX_CONFIGED_TAG_COMMANDS},
267 {AIC7XXX_CONFIGED_TAG_COMMANDS},
268 {AIC7XXX_CONFIGED_TAG_COMMANDS},
269 {AIC7XXX_CONFIGED_TAG_COMMANDS},
270 {AIC7XXX_CONFIGED_TAG_COMMANDS}
271 };
272
273 /*
274 * There should be a specific return value for this in scsi.h, but
275 * it seems that most drivers ignore it.
276 */
277 #define DID_UNDERFLOW DID_ERROR
278
279 void
280 ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
281 {
282 printk("(scsi%d:%c:%d:%d): ",
283 ahc->platform_data->host->host_no,
284 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
285 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
286 scb != NULL ? SCB_GET_LUN(scb) : -1);
287 }
288
289 /*
290 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
291 * cards in the system. This should be fixed. Exceptions to this
292 * rule are noted in the comments.
293 */
294
295 /*
296 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
297 * has no effect on any later resets that might occur due to things like
298 * SCSI bus timeouts.
299 */
300 static uint32_t aic7xxx_no_reset;
301
302 /*
303 * Certain PCI motherboards will scan PCI devices from highest to lowest,
304 * others scan from lowest to highest, and they tend to do all kinds of
305 * strange things when they come into contact with PCI bridge chips. The
306 * net result of all this is that the PCI card that is actually used to boot
307 * the machine is very hard to detect. Most motherboards go from lowest
308 * PCI slot number to highest, and the first SCSI controller found is the
309 * one you boot from. The only exceptions to this are when a controller
310 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
311 * from lowest PCI slot number to highest PCI slot number. We also force
312 * all controllers with their BIOS disabled to the end of the list. This
313 * works on *almost* all computers. Where it doesn't work, we have this
314 * option. Setting this option to non-0 will reverse the order of the sort
315 * to highest first, then lowest, but will still leave cards with their BIOS
316 * disabled at the very end. That should fix everyone up unless there are
317 * really strange cirumstances.
318 */
319 static int aic7xxx_reverse_scan = 0;
320
321 /*
322 * Should we force EXTENDED translation on a controller.
323 * 0 == Use whatever is in the SEEPROM or default to off
324 * 1 == Use whatever is in the SEEPROM or default to on
325 */
326 static uint32_t aic7xxx_extended = 0;
327
328 /*
329 * The IRQ trigger method used on EISA controllers. Does not effect PCI cards.
330 * -1 = Use detected settings.
331 * 0 = Force Edge triggered mode.
332 * 1 = Force Level triggered mode.
333 */
334 static int aic7xxx_irq_trigger = -1;
335
336 /*
337 * This variable is used to override the termination settings on a controller.
338 * This should not be used under normal conditions. However, in the case
339 * that a controller does not have a readable SEEPROM (so that we can't
340 * read the SEEPROM settings directly) and that a controller has a buggered
341 * version of the cable detection logic, this can be used to force the
342 * correct termination. It is preferable to use the manual termination
343 * settings in the BIOS if possible, but some motherboard controllers store
344 * those settings in a format we can't read. In other cases, auto term
345 * should also work, but the chipset was put together with no auto term
346 * logic (common on motherboard controllers). In those cases, we have
347 * 32 bits here to work with. That's good for 8 controllers/channels. The
348 * bits are organized as 4 bits per channel, with scsi0 getting the lowest
349 * 4 bits in the int. A 1 in a bit position indicates the termination setting
350 * that corresponds to that bit should be enabled, a 0 is disabled.
351 * It looks something like this:
352 *
353 * 0x0f = 1111-Single Ended Low Byte Termination on/off
354 * ||\-Single Ended High Byte Termination on/off
355 * |\-LVD Low Byte Termination on/off
356 * \-LVD High Byte Termination on/off
357 *
358 * For non-Ultra2 controllers, the upper 2 bits are not important. So, to
359 * enable both high byte and low byte termination on scsi0, I would need to
360 * make sure that the override_term variable was set to 0x03 (bits 0011).
361 * To make sure that all termination is enabled on an Ultra2 controller at
362 * scsi2 and only high byte termination on scsi1 and high and low byte
363 * termination on scsi0, I would set override_term=0xf23 (bits 1111 0010 0011)
364 *
365 * For the most part, users should never have to use this, that's why I
366 * left it fairly cryptic instead of easy to understand. If you need it,
367 * most likely someone will be telling you what your's needs to be set to.
368 */
369 static int aic7xxx_override_term = -1;
370
371 /*
372 * Certain motherboard chipset controllers tend to screw
373 * up the polarity of the term enable output pin. Use this variable
374 * to force the correct polarity for your system. This is a bitfield variable
375 * similar to the previous one, but this one has one bit per channel instead
376 * of four.
377 * 0 = Force the setting to active low.
378 * 1 = Force setting to active high.
379 * Most Adaptec cards are active high, several motherboards are active low.
380 * To force a 2940 card at SCSI 0 to active high and a motherboard 7895
381 * controller at scsi1 and scsi2 to active low, and a 2910 card at scsi3
382 * to active high, you would need to set stpwlev=0x9 (bits 1001).
383 *
384 * People shouldn't need to use this, but if you are experiencing lots of
385 * SCSI timeout problems, this may help. There is one sure way to test what
386 * this option needs to be. Using a boot floppy to boot the system, configure
387 * your system to enable all SCSI termination (in the Adaptec SCSI BIOS) and
388 * if needed then also pass a value to override_term to make sure that the
389 * driver is enabling SCSI termination, then set this variable to either 0
390 * or 1. When the driver boots, make sure there are *NO* SCSI cables
391 * connected to your controller. If it finds and inits the controller
392 * without problem, then the setting you passed to stpwlev was correct. If
393 * the driver goes into a reset loop and hangs the system, then you need the
394 * other setting for this variable. If neither setting lets the machine
395 * boot then you have definite termination problems that may not be fixable.
396 */
397 static int aic7xxx_stpwlev = -1;
398
399 /*
400 * Set this to non-0 in order to force the driver to panic the kernel
401 * and print out debugging info on a SCSI abort or reset cycle.
402 */
403 static int aic7xxx_panic_on_abort = 0;
404
405 /*
406 * PCI bus parity checking of the Adaptec controllers. This is somewhat
407 * dubious at best. To my knowledge, this option has never actually
408 * solved a PCI parity problem, but on certain machines with broken PCI
409 * chipset configurations, it can generate tons of false error messages.
410 * It's included in the driver for completeness.
411 * 0 = Shut off PCI parity check
412 * -1 = Normal polarity pci parity checking
413 * 1 = reverse polarity pci parity checking
414 *
415 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
416 * variable to -1 you would actually want to simply pass the variable
417 * name without a number. That will invert the 0 which will result in
418 * -1.
419 */
420 static int aic7xxx_pci_parity = 0;
421
422 /*
423 * Set this to a non-0 value to make us dump out the 32 bit instruction
424 * registers on the card after completing the sequencer download. This
425 * allows the actual sequencer download to be verified. It is possible
426 * to use this option and still boot up and run your system. This is
427 * only intended for debugging purposes.
428 */
429 static int aic7xxx_dump_sequencer = 0;
430
431 /*
432 * Certain newer motherboards have put new PCI based devices into the
433 * IO spaces that used to typically be occupied by VLB or EISA cards.
434 * This overlap can cause these newer motherboards to lock up when scanned
435 * for older EISA and VLB devices. Setting this option to non-0 will
436 * cause the driver to skip scanning for any VLB or EISA controllers and
437 * only support the PCI controllers. NOTE: this means that if the kernel
438 * os compiled with PCI support disabled, then setting this to non-0
439 * would result in never finding any devices :)
440 */
441 int aic7xxx_no_probe;
442
443 /*
444 * aic7xxx_detect() has been run, so register all device arrivals
445 * immediately with the system rather than deferring to the sorted
446 * attachment performed by aic7xxx_detect().
447 */
448 int aic7xxx_detect_complete;
449
450 /*
451 * So that we can set how long each device is given as a selection timeout.
452 * The table of values goes like this:
453 * 0 - 256ms
454 * 1 - 128ms
455 * 2 - 64ms
456 * 3 - 32ms
457 * We default to 256ms because some older devices need a longer time
458 * to respond to initial selection.
459 */
460 static int aic7xxx_seltime = 0x00;
461
462 /*
463 * So that insmod can find the variable and make it point to something
464 */
465 #ifdef MODULE
466 static char *aic7xxx = NULL;
467
468 MODULE_PARM(aic7xxx, "s");
469
470 /*
471 * Just in case someone uses commas to separate items on the insmod
472 * command line, we define a dummy buffer here to avoid having insmod
473 * write wild stuff into our code segment
474 */
475 static char dummy_buffer[60] = "Please don't trounce on me insmod!!\n";
476
477 #endif
478
479 static void ahc_linux_handle_scsi_status(struct ahc_softc *,
480 struct ahc_linux_device *,
481 struct scb *);
482 static void ahc_linux_filter_command(struct ahc_softc*, Scsi_Cmnd*,
483 struct scb*);
484 static void ahc_linux_sem_timeout(u_long arg);
485 static void ahc_linux_freeze_sim_queue(struct ahc_softc *ahc);
486 static void ahc_linux_release_sim_queue(u_long arg);
487 static int ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag);
488 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
489 static void ahc_linux_select_queue_depth(struct Scsi_Host *host,
490 Scsi_Device *scsi_devs);
491 static void ahc_linux_device_queue_depth(struct ahc_softc *ahc,
492 Scsi_Device *device);
493 static struct ahc_linux_target* ahc_linux_alloc_target(struct ahc_softc*,
494 u_int, u_int);
495 static void ahc_linux_free_target(struct ahc_softc*,
496 struct ahc_linux_target*);
497 static struct ahc_linux_device* ahc_linux_alloc_device(struct ahc_softc*,
498 struct ahc_linux_target*,
499 u_int);
500 static void ahc_linux_free_device(struct ahc_softc*,
501 struct ahc_linux_device*);
502 static void ahc_linux_run_device_queue(struct ahc_softc*,
503 struct ahc_linux_device*);
504 static void ahc_linux_setup_tag_info(char *p, char *end);
505 static int ahc_linux_next_unit(void);
506 static int ahc_linux_halt(struct notifier_block *nb, u_long event, void *buf);
507
508 static __inline struct ahc_linux_device*
509 ahc_linux_get_device(struct ahc_softc *ahc, u_int channel,
510 u_int target, u_int lun, int alloc);
511 static __inline void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
512 Scsi_Cmnd *cmd);
513 static __inline void ahc_linux_run_complete_queue(struct ahc_softc *ahc,
514 struct ahc_cmd *acmd);
515 static __inline void ahc_linux_check_device_queue(struct ahc_softc *ahc,
516 struct ahc_linux_device *dev);
517 static __inline void ahc_linux_sniff_command(struct ahc_softc*, Scsi_Cmnd*,
518 struct scb*);
519 static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
520
521 static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
522 struct ahc_dma_seg *sg,
523 bus_addr_t addr, bus_size_t len);
524
525 static __inline struct ahc_linux_device*
526 ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
527 u_int lun, int alloc)
528 {
529 struct ahc_linux_target *targ;
530 struct ahc_linux_device *dev;
531 u_int target_offset;
532
533 target_offset = target;
534 if (channel != 0)
535 target_offset += 8;
536 targ = ahc->platform_data->targets[target_offset];
537 if (targ == NULL) {
538 if (alloc != 0) {
539 targ = ahc_linux_alloc_target(ahc, channel, target);
540 if (targ == NULL)
541 return (NULL);
542 } else
543 return (NULL);
544 }
545 dev = targ->devices[lun];
546 if (dev == NULL && alloc != 0)
547 dev = ahc_linux_alloc_device(ahc, targ, lun);
548 return (dev);
549 }
550
551 static __inline void
552 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd)
553 {
554 /*
555 * Typically, the complete queue has very few entries
556 * queued to it before the queue is emptied by
557 * ahc_linux_run_complete_queue, so sorting the entries
558 * by generation number should be inexpensive.
559 * We perform the sort so that commands that complete
560 * with an error are retuned in the order origionally
561 * queued to the controller so that any subsequent retries
562 * are performed in order. The underlying ahc routines do
563 * not guarantee the order that aborted commands will be
564 * returned to us.
565 */
566 struct ahc_completeq *completeq;
567 struct ahc_cmd *list_cmd;
568 struct ahc_cmd *acmd;
569
570 /*
571 * If we want the request requeued, make sure there
572 * are sufficent retries. In the old scsi error code,
573 * we used to be able to specify a result code that
574 * bypassed the retry count. Now we must use this
575 * hack.
576 */
577 if (cmd->result == (CAM_REQUEUE_REQ << 16))
578 cmd->retries--;
579 completeq = &ahc->platform_data->completeq;
580 list_cmd = TAILQ_FIRST(completeq);
581 acmd = (struct ahc_cmd *)cmd;
582 while (list_cmd != NULL
583 && acmd_scsi_cmd(list_cmd).serial_number
584 < acmd_scsi_cmd(acmd).serial_number)
585 list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
586 if (list_cmd != NULL)
587 TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
588 else
589 TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
590 }
591
592 static __inline void
593 ahc_linux_run_complete_queue(struct ahc_softc *ahc, struct ahc_cmd *acmd)
594 {
595 u_long done_flags;
596
597 ahc_done_lock(ahc, &done_flags);
598 while (acmd != NULL) {
599 Scsi_Cmnd *cmd;
600
601 cmd = &acmd_scsi_cmd(acmd);
602 acmd = TAILQ_NEXT(acmd, acmd_links.tqe);
603 cmd->host_scribble = NULL;
604 cmd->scsi_done(cmd);
605 }
606 ahc_done_unlock(ahc, &done_flags);
607 }
608
609 static __inline void
610 ahc_linux_check_device_queue(struct ahc_softc *ahc,
611 struct ahc_linux_device *dev)
612 {
613 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) != 0
614 && dev->active == 0) {
615 dev->flags &= ~AHC_DEV_FREEZE_TIL_EMPTY;
616 dev->qfrozen--;
617 }
618
619 if (TAILQ_FIRST(&dev->busyq) == NULL
620 || dev->openings == 0 || dev->qfrozen != 0)
621 return;
622
623 ahc_linux_run_device_queue(ahc, dev);
624 }
625
626 static __inline void
627 ahc_linux_run_device_queues(struct ahc_softc *ahc)
628 {
629 struct ahc_linux_device *dev;
630
631 while ((ahc->flags & AHC_RESOURCE_SHORTAGE) == 0
632 && ahc->platform_data->qfrozen == 0
633 && (dev = TAILQ_FIRST(&ahc->platform_data->device_runq)) != NULL) {
634 TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links);
635 dev->flags &= ~AHC_DEV_ON_RUN_LIST;
636 ahc_linux_check_device_queue(ahc, dev);
637 }
638 }
639
640 static __inline void
641 ahc_linux_sniff_command(struct ahc_softc *ahc, Scsi_Cmnd *cmd, struct scb *scb)
642 {
643 /*
644 * Determine whether we care to filter
645 * information out of this command. If so,
646 * pass it on to ahc_linux_filter_command() for more
647 * heavy weight processing.
648 */
649 if (cmd->cmnd[0] == INQUIRY)
650 ahc_linux_filter_command(ahc, cmd, scb);
651 }
652
653 static __inline void
654 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
655 {
656 Scsi_Cmnd *cmd;
657
658 cmd = scb->io_ctx;
659 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
660 if (cmd->use_sg != 0) {
661 struct scatterlist *sg;
662
663 sg = (struct scatterlist *)cmd->request_buffer;
664 pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg,
665 scsi_to_pci_dma_dir(cmd->sc_data_direction));
666 } else if (cmd->request_bufflen != 0)
667 pci_unmap_single(ahc->dev_softc,
668 ahc_le32toh(scb->sg_list[0].addr),
669 cmd->request_bufflen,
670 scsi_to_pci_dma_dir(cmd->sc_data_direction));
671 }
672
673 static __inline int
674 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
675 struct ahc_dma_seg *sg, bus_addr_t addr, bus_size_t len)
676 {
677 int consumed;
678
679 if ((scb->sg_count + 1) > AHC_NSEG)
680 panic("Too few segs for dma mapping. "
681 "Increase AHC_NSEG\n");
682
683 consumed = 1;
684 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
685 scb->platform_data->xfer_len += len;
686 if (sizeof(bus_addr_t) > 4
687 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) {
688 /*
689 * Due to DAC restrictions, we can't
690 * cross a 4GB boundary.
691 */
692 if ((addr ^ (addr + len - 1)) & ~0xFFFFFFFF) {
693 struct ahc_dma_seg *next_sg;
694 uint32_t next_len;
695
696 printf("Crossed Seg\n");
697 if ((scb->sg_count + 2) > AHC_NSEG)
698 panic("Too few segs for dma mapping. "
699 "Increase AHC_NSEG\n");
700
701 consumed++;
702 next_sg = sg + 1;
703 next_sg->addr = 0;
704 next_len = 0x100000000 - (addr & 0xFFFFFFFF);
705 len -= next_len;
706 next_len |= ((addr >> 8) + 0x1000000) & 0x7F000000;
707 next_sg->len = ahc_htole32(next_len);
708 }
709 len |= (addr >> 8) & 0x7F000000;
710 }
711 sg->len = ahc_htole32(len);
712 return (consumed);
713 }
714
715 /************************ Shutdown/halt/reboot hook ***************************/
716 #include <linux/notifier.h>
717 #include <linux/reboot.h>
718
719 static struct notifier_block ahc_linux_notifier = {
720 ahc_linux_halt, NULL, 0
721 };
722
723 static int ahc_linux_halt(struct notifier_block *nb, u_long event, void *buf)
724 {
725 struct ahc_softc *ahc;
726
727 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
728 ahc_shutdown(ahc);
729 }
730 return (NOTIFY_OK);
731 }
732
733 /******************************** Macros **************************************/
734 #define BUILD_SCSIID(ahc, cmd) \
735 ((((cmd)->target << TID_SHIFT) & TID) \
736 | (((cmd)->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
737 | (((cmd)->channel == 0) ? 0 : TWIN_CHNLB))
738
739 /******************************** Bus DMA *************************************/
740 int
741 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
742 bus_size_t alignment, bus_size_t boundary,
743 bus_addr_t lowaddr, bus_addr_t highaddr,
744 bus_dma_filter_t *filter, void *filterarg,
745 bus_size_t maxsize, int nsegments,
746 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
747 {
748 bus_dma_tag_t dmat;
749
750 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
751 if (dmat == NULL)
752 return (ENOMEM);
753
754 /*
755 * Linux is very simplistic about DMA memory. For now don't
756 * maintain all specification information. Once Linux supplies
757 * better facilities for doing these operations, or the
758 * needs of this particular driver change, we might need to do
759 * more here.
760 */
761 dmat->alignment = alignment;
762 dmat->boundary = boundary;
763 dmat->maxsize = maxsize;
764 *ret_tag = dmat;
765 return (0);
766 }
767
768 void
769 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
770 {
771 free(dmat, M_DEVBUF);
772 }
773
774 int
775 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
776 int flags, bus_dmamap_t *mapp)
777 {
778 bus_dmamap_t map;
779
780 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
781 map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
782 if (map == NULL)
783 return (ENOMEM);
784 /*
785 * Although we can dma data above 4GB, our
786 * "consistent" memory is below 4GB for
787 * space efficiency reasons (only need a 4byte
788 * address). For this reason, we have to reset
789 * our dma mask when doing allocations.
790 */
791 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,3)
792 pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF);
793 #else
794 ahc->dev_softc->dma_mask = 0xFFFFFFFF;
795 #endif
796 *vaddr = pci_alloc_consistent(ahc->dev_softc,
797 dmat->maxsize, &map->bus_addr);
798 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,3)
799 pci_set_dma_mask(ahc->dev_softc, ahc->platform_data->hw_dma_mask);
800 #else
801 ahc->dev_softc->dma_mask = ahc->platform_data->hw_dma_mask;
802 #endif
803 #else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0) */
804 /*
805 * At least in 2.2.14, malloc is a slab allocator so all
806 * allocations are aligned. We assume, for these kernel versions
807 * that all allocations will be bellow 4Gig, physically contiguous,
808 * and accessable via DMA by the controller.
809 */
810 map = NULL; /* No additional information to store */
811 *vaddr = malloc(dmat->maxsize, M_DEVBUF, M_NOWAIT);
812 #endif
813 if (*vaddr == NULL)
814 return (ENOMEM);
815 *mapp = map;
816 return(0);
817 }
818
819 void
820 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
821 void* vaddr, bus_dmamap_t map)
822 {
823 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
824 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
825 vaddr, map->bus_addr);
826 #else
827 free(vaddr, M_DEVBUF);
828 #endif
829 }
830
831 int
832 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
833 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
834 void *cb_arg, int flags)
835 {
836 /*
837 * Assume for now that this will only be used during
838 * initialization and not for per-transaction buffer mapping.
839 */
840 bus_dma_segment_t stack_sg;
841
842 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
843 stack_sg.ds_addr = map->bus_addr;
844 #else
845 stack_sg.ds_addr = VIRT_TO_BUS(buf);
846 #endif
847 stack_sg.ds_len = dmat->maxsize;
848 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
849 return (0);
850 }
851
852 void
853 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
854 {
855 /*
856 * The map may is NULL in our < 2.3.X implementation.
857 */
858 if (map != NULL)
859 free(map, M_DEVBUF);
860 }
861
862 int
863 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
864 {
865 /* Nothing to do */
866 return (0);
867 }
868
869 /********************* Platform Dependent Functions ***************************/
870 int
871 ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
872 {
873 int value;
874 int rvalue;
875 int lvalue;
876
877 /*
878 * Under Linux, cards are ordered as follows:
879 * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
880 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
881 * 3) All remaining VLB/EISA devices sorted by ioport.
882 * 4) All remaining PCI devices sorted by bus/slot/func.
883 */
884 value = (lahc->flags & AHC_BIOS_ENABLED)
885 - (rahc->flags & AHC_BIOS_ENABLED);
886 if (value != 0)
887 /* Controllers with BIOS enabled have a *higher* priority */
888 return (-value);
889
890 /*
891 * Same BIOS setting, now sort based on bus type.
892 * EISA and VL controllers sort together. EISA/VL
893 * have higher priority than PCI.
894 */
895 rvalue = (rahc->chip & AHC_BUS_MASK);
896 if (rvalue == AHC_VL)
897 rvalue = AHC_EISA;
898 lvalue = (lahc->chip & AHC_BUS_MASK);
899 if (lvalue == AHC_VL)
900 lvalue = AHC_EISA;
901 value = lvalue - rvalue;
902 if (value != 0)
903 return (value);
904
905 /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
906 switch (rvalue) {
907 case AHC_PCI:
908 {
909 char primary_channel;
910
911 value = ahc_get_pci_bus(lahc->dev_softc)
912 - ahc_get_pci_bus(rahc->dev_softc);
913 if (value != 0)
914 break;
915 value = ahc_get_pci_slot(lahc->dev_softc)
916 - ahc_get_pci_slot(rahc->dev_softc);
917 if (value != 0)
918 break;
919 /*
920 * On multi-function devices, the user can choose
921 * to have function 1 probed before function 0.
922 * Give whichever channel is the primary channel
923 * the lowest priority.
924 */
925 primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
926 value = 1;
927 if (lahc->channel == primary_channel)
928 value = -1;
929 break;
930 }
931 case AHC_EISA:
932 if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
933 value = lahc->platform_data->bios_address
934 - rahc->platform_data->bios_address;
935 } else {
936 value = lahc->bsh.ioport
937 - rahc->bsh.ioport;
938 }
939 break;
940 default:
941 panic("ahc_softc_sort: invalid bus type");
942 }
943 return (value);
944 }
945
946 static void
947 ahc_linux_setup_tag_info(char *p, char *end)
948 {
949 char *base;
950 char *tok;
951 char *tok_end;
952 char *tok_end2;
953 int i;
954 int instance;
955 int targ;
956 int done;
957 char tok_list[] = {'.', ',', '{', '}', '\0'};
958
959 if (*p != ':')
960 return;
961
962 instance = -1;
963 targ = -1;
964 done = FALSE;
965 base = p;
966 /* Forward us just past the ':' */
967 tok = base + 1;
968 tok_end = strchr(tok, '\0');
969 if (tok_end < end)
970 *tok_end = ',';
971 while (!done) {
972 switch (*tok) {
973 case '{':
974 if (instance == -1)
975 instance = 0;
976 else if (targ == -1)
977 targ = 0;
978 tok++;
979 break;
980 case '}':
981 if (targ != -1)
982 targ = -1;
983 else if (instance != -1)
984 instance = -1;
985 tok++;
986 break;
987 case ',':
988 case '.':
989 if (instance == -1)
990 done = TRUE;
991 else if (targ >= 0)
992 targ++;
993 else if (instance >= 0)
994 instance++;
995 if ((targ >= AHC_NUM_TARGETS) ||
996 (instance >= NUM_ELEMENTS(aic7xxx_tag_info)))
997 done = TRUE;
998 tok++;
999 if (!done) {
1000 base = tok;
1001 }
1002 break;
1003 case '\0':
1004 done = TRUE;
1005 break;
1006 default:
1007 done = TRUE;
1008 tok_end = strchr(tok, '\0');
1009 for (i = 0; tok_list[i]; i++) {
1010 tok_end2 = strchr(tok, tok_list[i]);
1011 if ((tok_end2) && (tok_end2 < tok_end)) {
1012 tok_end = tok_end2;
1013 done = FALSE;
1014 }
1015 }
1016 if ((instance >= 0) && (targ >= 0)
1017 && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
1018 && (targ < AHC_NUM_TARGETS)) {
1019 aic7xxx_tag_info[instance].tag_commands[targ] =
1020 simple_strtoul(tok, NULL, 0) & 0xff;
1021 }
1022 tok = tok_end;
1023 break;
1024 }
1025 }
1026 while ((p != base) && (p != NULL))
1027 p = strtok(NULL, ",.");
1028 }
1029
1030 /*
1031 * Handle Linux boot parameters. This routine allows for assigning a value
1032 * to a parameter with a ':' between the parameter and the value.
1033 * ie. aic7xxx=unpause:0x0A,extended
1034 */
1035 int
1036 aic7xxx_setup(char *s)
1037 {
1038 int i, n;
1039 char *p;
1040 char *end;
1041
1042 static struct {
1043 const char *name;
1044 uint32_t *flag;
1045 } options[] = {
1046 { "extended", &aic7xxx_extended },
1047 { "no_reset", &aic7xxx_no_reset },
1048 { "irq_trigger", &aic7xxx_irq_trigger },
1049 { "verbose", &aic7xxx_verbose },
1050 { "reverse_scan", &aic7xxx_reverse_scan },
1051 { "override_term", &aic7xxx_override_term },
1052 { "stpwlev", &aic7xxx_stpwlev },
1053 { "no_probe", &aic7xxx_no_probe },
1054 { "panic_on_abort", &aic7xxx_panic_on_abort },
1055 { "pci_parity", &aic7xxx_pci_parity },
1056 { "dump_sequencer", &aic7xxx_dump_sequencer },
1057 { "seltime", &aic7xxx_seltime },
1058 { "tag_info", NULL }
1059 };
1060
1061 end = strchr(s, '\0');
1062
1063 for (p = strtok(s, ",."); p; p = strtok(NULL, ",.")) {
1064 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1065 n = strlen(options[i].name);
1066
1067 if (strncmp(options[i].name, p, n) != 0)
1068 continue;
1069
1070 if (strncmp(p, "tag_info", n) == 0) {
1071 ahc_linux_setup_tag_info(p + n, end);
1072 } else if (p[n] == ':') {
1073 *(options[i].flag) =
1074 simple_strtoul(p + n + 1, NULL, 0);
1075 } else if (!strncmp(p, "verbose", n)) {
1076 *(options[i].flag) = 1;
1077 } else {
1078 *(options[i].flag) = ~(*(options[i].flag));
1079 }
1080 break;
1081 }
1082 }
1083 register_reboot_notifier(&ahc_linux_notifier);
1084 return 1;
1085 }
1086
1087 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
1088 __setup("aic7xxx=", aic7xxx_setup);
1089 #endif
1090
1091 int aic7xxx_verbose;
1092
1093 /*
1094 * Try to detect an Adaptec 7XXX controller.
1095 */
1096 int
1097 ahc_linux_detect(Scsi_Host_Template *template)
1098 {
1099 struct ahc_softc *ahc;
1100 int found;
1101
1102 /*
1103 * Sanity checking of Linux SCSI data structures so
1104 * that some of our hacks^H^H^H^H^Hassumptions aren't
1105 * violated.
1106 */
1107 if (offsetof(struct ahc_cmd_internal, end)
1108 > offsetof(struct scsi_cmnd, host_scribble)) {
1109 printf("ahc_linux_detect: SCSI data structures changed.\n");
1110 printf("ahc_linux_detect: Unable to attach\n");
1111 return (0);
1112 }
1113 #ifdef MODULE
1114 /*
1115 * If we've been passed any parameters, process them now.
1116 */
1117 if (aic7xxx)
1118 aic7xxx_setup(aic7xxx);
1119 if (dummy_buffer[0] != 'P')
1120 printk(KERN_WARNING
1121 "aic7xxx: Please read the file /usr/src/linux/drivers/scsi/README.aic7xxx\n"
1122 "aic7xxx: to see the proper way to specify options to the aic7xxx module\n"
1123 "aic7xxx: Specifically, don't use any commas when passing arguments to\n"
1124 "aic7xxx: insmod or else it might trash certain memory areas.\n");
1125 #endif
1126
1127 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,0)
1128 template->proc_name = "aic7xxx";
1129 #else
1130 template->proc_dir = &proc_scsi_aic7xxx;
1131 #endif
1132 template->sg_tablesize = AHC_NSEG;
1133
1134 #ifdef CONFIG_PCI
1135 ahc_linux_pci_probe(template);
1136 #endif
1137
1138 aic7770_linux_probe(template);
1139
1140 /*
1141 * Register with the SCSI layer all
1142 * controllers we've found.
1143 */
1144 found = 0;
1145 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
1146
1147 if (ahc_linux_register_host(ahc, template) == 0)
1148 found++;
1149 }
1150 aic7xxx_detect_complete++;
1151 return (found);
1152 }
1153
1154 int
1155 ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
1156 {
1157 char buf[80];
1158 struct Scsi_Host *host;
1159 char *new_name;
1160 u_long s;
1161
1162
1163 template->name = ahc->description;
1164 host = scsi_register(template, sizeof(struct ahc_softc *));
1165 if (host == NULL)
1166 return (ENOMEM);
1167
1168 ahc_lock(ahc, &s);
1169 *((struct ahc_softc **)host->hostdata) = ahc;
1170 ahc->platform_data->host = host;
1171 host->can_queue = AHC_MAX_QUEUE;
1172 host->cmd_per_lun = 2;
1173 host->sg_tablesize = AHC_NSEG;
1174 host->select_queue_depths = ahc_linux_select_queue_depth;
1175 /* XXX No way to communicate the ID for multiple channels */
1176 host->this_id = ahc->our_id;
1177 host->irq = ahc->platform_data->irq;
1178 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1179 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1180 ahc_set_unit(ahc, ahc_linux_next_unit());
1181 sprintf(buf, "scsi%d", host->host_no);
1182 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1183 if (new_name != NULL) {
1184 strcpy(new_name, buf);
1185 ahc_set_name(ahc, new_name);
1186 }
1187 host->unique_id = ahc->unit;
1188 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,4)
1189 scsi_set_pci_device(host, ahc->dev_softc);
1190 #endif
1191 ahc_linux_initialize_scsi_bus(ahc);
1192 ahc_unlock(ahc, &s);
1193 return (0);
1194 }
1195
1196 uint64_t
1197 ahc_linux_get_memsize()
1198 {
1199 struct sysinfo si;
1200
1201 si_meminfo(&si);
1202 return (si.totalram << PAGE_SHIFT);
1203 }
1204
1205 /*
1206 * Find the smallest available unit number to use
1207 * for a new device. We don't just use a static
1208 * count to handle the "repeated hot-(un)plug"
1209 * scenario.
1210 */
1211 static int
1212 ahc_linux_next_unit()
1213 {
1214 struct ahc_softc *ahc;
1215 int unit;
1216
1217 unit = 0;
1218 retry:
1219 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
1220 if (ahc->unit == unit) {
1221 unit++;
1222 goto retry;
1223 }
1224 }
1225 return (unit);
1226 }
1227
1228 /*
1229 * Place the SCSI bus into a known state by either resetting it,
1230 * or forcing transfer negotiations on the next command to any
1231 * target.
1232 */
1233 void
1234 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1235 {
1236 int i;
1237 int numtarg;
1238
1239 i = 0;
1240 numtarg = 0;
1241
1242 if (aic7xxx_no_reset != 0)
1243 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1244
1245 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1246 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1247 else
1248 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1249
1250 if ((ahc->features & AHC_TWIN) != 0) {
1251
1252 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1253 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1254 } else {
1255 if (numtarg == 0)
1256 i = 8;
1257 numtarg += 8;
1258 }
1259 }
1260
1261 for (; i < numtarg; i++) {
1262 struct ahc_devinfo devinfo;
1263 struct ahc_initiator_tinfo *tinfo;
1264 struct ahc_tmode_tstate *tstate;
1265 u_int our_id;
1266 u_int target_id;
1267 char channel;
1268
1269 channel = 'A';
1270 our_id = ahc->our_id;
1271 target_id = i;
1272 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1273 channel = 'B';
1274 our_id = ahc->our_id_b;
1275 target_id = i % 8;
1276 }
1277 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1278 target_id, &tstate);
1279 tinfo->goal = tinfo->user;
1280 /*
1281 * Don't try negotiations that require PPR messages
1282 * until we successfully retrieve Inquiry data.
1283 */
1284 tinfo->goal.ppr_options = 0;
1285 if (tinfo->goal.transport_version > SCSI_REV_2)
1286 tinfo->goal.transport_version = SCSI_REV_2;
1287 ahc_compile_devinfo(&devinfo, our_id, target_id,
1288 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1289 ahc_update_neg_request(ahc, &devinfo, tstate,
1290 tinfo, /*force*/FALSE);
1291 }
1292 /* Give the bus some time to recover */
1293 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1294 ahc_linux_freeze_sim_queue(ahc);
1295 init_timer(&ahc->platform_data->reset_timer);
1296 ahc->platform_data->reset_timer.data = (u_long)ahc;
1297 ahc->platform_data->reset_timer.expires =
1298 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
1299 ahc->platform_data->reset_timer.function =
1300 ahc_linux_release_sim_queue;
1301 add_timer(&ahc->platform_data->reset_timer);
1302 }
1303 }
1304
1305 int
1306 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1307 {
1308 ahc->platform_data =
1309 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1310 if (ahc->platform_data == NULL)
1311 return (ENOMEM);
1312 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1313 TAILQ_INIT(&ahc->platform_data->completeq);
1314 TAILQ_INIT(&ahc->platform_data->device_runq);
1315 ahc->platform_data->hw_dma_mask = 0xFFFFFFFF;
1316 ahc_lockinit(ahc);
1317 ahc_done_lockinit(ahc);
1318 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
1319 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
1320 #else
1321 ahc->platform_data->eh_sem = MUTEX_LOCKED;
1322 #endif
1323 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1324 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1325 return (0);
1326 }
1327
1328 void
1329 ahc_platform_free(struct ahc_softc *ahc)
1330 {
1331 if (ahc->platform_data != NULL) {
1332 if (ahc->platform_data->host != NULL)
1333 scsi_unregister(ahc->platform_data->host);
1334 if (ahc->platform_data->irq)
1335 free_irq(ahc->platform_data->irq, ahc);
1336 if (ahc->tag == BUS_SPACE_PIO
1337 && ahc->bsh.ioport != 0)
1338 release_region(ahc->bsh.ioport, 256);
1339 if (ahc->tag == BUS_SPACE_MEMIO
1340 && ahc->bsh.maddr != NULL) {
1341 u_long base_addr;
1342
1343 base_addr = (u_long)ahc->bsh.maddr;
1344 base_addr &= PAGE_MASK;
1345 iounmap((void *)base_addr);
1346 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
1347 release_mem_region(ahc->platform_data->mem_busaddr,
1348 0x1000);
1349 #endif
1350 }
1351 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
1352 /* XXX Need an instance detach in the PCI code */
1353 if (ahc->dev_softc != NULL)
1354 ahc->dev_softc->driver = NULL;
1355 #endif
1356 free(ahc->platform_data, M_DEVBUF);
1357 }
1358 }
1359
1360 void
1361 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1362 {
1363 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1364 SCB_GET_CHANNEL(ahc, scb),
1365 SCB_GET_LUN(scb), SCB_LIST_NULL,
1366 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1367 }
1368
1369 void
1370 ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1371 ahc_queue_alg alg)
1372 {
1373 struct ahc_linux_device *dev;
1374 int was_queuing;
1375 int now_queuing;
1376
1377 dev = ahc_linux_get_device(ahc, devinfo->channel - 'A',
1378 devinfo->target,
1379 devinfo->lun, /*alloc*/FALSE);
1380 if (dev == NULL)
1381 return;
1382 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1383 now_queuing = alg != AHC_QUEUE_NONE;
1384 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1385 && (was_queuing != now_queuing)
1386 && (dev->active != 0)) {
1387 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1388 dev->qfrozen++;
1389 }
1390
1391 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1392 if (now_queuing) {
1393
1394 if (!was_queuing) {
1395 /*
1396 * Start out agressively and allow our
1397 * dynamic queue depth algorithm to take
1398 * care of the rest.
1399 */
1400 dev->maxtags = AHC_MAX_QUEUE;
1401 dev->openings = dev->maxtags - dev->active;
1402 }
1403 if (alg == AHC_QUEUE_TAGGED)
1404 dev->flags |= AHC_DEV_Q_TAGGED;
1405 else
1406 dev->flags |= AHC_DEV_Q_BASIC;
1407 } else {
1408 /* We can only have one opening */
1409 dev->maxtags = 0;
1410 dev->openings = 1 - dev->active;
1411 }
1412 }
1413
1414 int
1415 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1416 int lun, u_int tag, role_t role, uint32_t status)
1417 {
1418 int chan;
1419 int maxchan;
1420 int targ;
1421 int maxtarg;
1422 int clun;
1423 int maxlun;
1424 int count;
1425
1426 if (tag != SCB_LIST_NULL)
1427 return (0);
1428
1429 chan = 0;
1430 if (channel != ALL_CHANNELS) {
1431 chan = channel - 'A';
1432 maxchan = chan + 1;
1433 } else {
1434 maxchan = (ahc->features & AHC_TWIN) ? 2 : 1;
1435 }
1436 targ = 0;
1437 if (target != CAM_TARGET_WILDCARD) {
1438 targ = target;
1439 maxtarg = targ + 1;
1440 } else {
1441 maxtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1442 }
1443 clun = 0;
1444 if (lun != CAM_LUN_WILDCARD) {
1445 clun = lun;
1446 maxlun = clun + 1;
1447 } else {
1448 maxlun = 16;
1449 }
1450
1451 count = 0;
1452 for (; chan < maxchan; chan++) {
1453 for (; targ < maxtarg; targ++) {
1454 for (; clun < maxlun; clun++) {
1455 struct ahc_linux_device *dev;
1456 struct ahc_busyq *busyq;
1457 struct ahc_cmd *acmd;
1458
1459 dev = ahc_linux_get_device(ahc, chan,
1460 targ, clun,
1461 /*alloc*/FALSE);
1462 if (dev == NULL)
1463 continue;
1464
1465 busyq = &dev->busyq;
1466 while ((acmd = TAILQ_FIRST(busyq)) != NULL) {
1467 Scsi_Cmnd *cmd;
1468
1469 cmd = &acmd_scsi_cmd(acmd);
1470 TAILQ_REMOVE(busyq, acmd,
1471 acmd_links.tqe);
1472 count++;
1473 cmd->result = status << 16;
1474 ahc_linux_queue_cmd_complete(ahc, cmd);
1475 }
1476 }
1477 }
1478 }
1479
1480 return (count);
1481 }
1482
1483 /*
1484 * Sets the queue depth for each SCSI device hanging
1485 * off the input host adapter.
1486 */
1487 static void
1488 ahc_linux_select_queue_depth(struct Scsi_Host * host,
1489 Scsi_Device * scsi_devs)
1490 {
1491 Scsi_Device *device;
1492 struct ahc_softc *ahc;
1493 u_long flags;
1494 int scbnum;
1495
1496 ahc = *((struct ahc_softc **)host->hostdata);
1497 ahc_lock(ahc, &flags);
1498 scbnum = 0;
1499 for (device = scsi_devs; device != NULL; device = device->next) {
1500 if (device->host == host) {
1501 ahc_linux_device_queue_depth(ahc, device);
1502 scbnum += device->queue_depth;
1503 }
1504 }
1505 ahc_unlock(ahc, &flags);
1506 }
1507
1508 /*
1509 * Determines the queue depth for a given device.
1510 */
1511 static void
1512 ahc_linux_device_queue_depth(struct ahc_softc *ahc, Scsi_Device * device)
1513 {
1514 struct ahc_devinfo devinfo;
1515 struct ahc_initiator_tinfo *targ_info;
1516 struct ahc_tmode_tstate *tstate;
1517 uint8_t tags;
1518
1519 ahc_compile_devinfo(&devinfo,
1520 device->channel == 0 ? ahc->our_id : ahc->our_id_b,
1521 device->id, device->lun,
1522 device->channel == 0 ? 'A' : 'B',
1523 ROLE_INITIATOR);
1524 targ_info = ahc_fetch_transinfo(ahc, devinfo.channel,
1525 devinfo.our_scsiid,
1526 devinfo.target, &tstate);
1527
1528 tags = 0;
1529 if (device->tagged_supported != 0
1530 && (ahc->user_discenable & devinfo.target_mask) != 0) {
1531 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
1532
1533 printf("aic7xxx: WARNING, insufficient "
1534 "tag_info instances for installed "
1535 "controllers. Using defaults\n");
1536 printf("aic7xxx: Please update the "
1537 "aic7xxx_tag_info array in the "
1538 "aic7xxx.c source file.\n");
1539 tags = AHC_MAX_QUEUE;
1540 } else {
1541 adapter_tag_info_t *tag_info;
1542
1543 tag_info = &aic7xxx_tag_info[ahc->unit];
1544 tags = tag_info->tag_commands[devinfo.target_offset];
1545 if (tags > AHC_MAX_QUEUE)
1546 tags = AHC_MAX_QUEUE;
1547 }
1548 }
1549 if (tags != 0) {
1550 device->queue_depth = tags;
1551 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
1552 printf("scsi%d:%d:%d:%d: Tagged Queuing enabled. Depth %d\n",
1553 ahc->platform_data->host->host_no, device->channel,
1554 device->id, device->lun, tags);
1555 } else {
1556 /*
1557 * We allow the OS to queue 2 untagged transactions to
1558 * us at any time even though we can only execute them
1559 * serially on the controller/device. This should remove
1560 * some latency.
1561 */
1562 device->queue_depth = 2;
1563 }
1564 }
1565
1566 /*
1567 * Queue an SCB to the controller.
1568 */
1569 int
1570 ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
1571 {
1572 struct ahc_softc *ahc;
1573 struct ahc_linux_device *dev;
1574 u_long flags;
1575
1576 ahc = *(struct ahc_softc **)cmd->host->hostdata;
1577
1578 /*
1579 * Save the callback on completion function.
1580 */
1581 cmd->scsi_done = scsi_done;
1582
1583 ahc_lock(ahc, &flags);
1584 dev = ahc_linux_get_device(ahc, cmd->channel, cmd->target,
1585 cmd->lun, /*alloc*/TRUE);
1586 if (dev == NULL) {
1587 ahc_unlock(ahc, &flags);
1588 printf("aic7xxx_linux_queue: Unable to allocate device!\n");
1589 return (-ENOMEM);
1590 }
1591 cmd->result = CAM_REQ_INPROG << 16;
1592 TAILQ_INSERT_TAIL(&dev->busyq, (struct ahc_cmd *)cmd, acmd_links.tqe);
1593 if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
1594 TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
1595 dev->flags |= AHC_DEV_ON_RUN_LIST;
1596 ahc_linux_run_device_queues(ahc);
1597 }
1598 ahc_unlock(ahc, &flags);
1599 return (0);
1600 }
1601
1602 static void
1603 ahc_linux_run_device_queue(struct ahc_softc *ahc, struct ahc_linux_device *dev)
1604 {
1605 struct ahc_cmd *acmd;
1606 struct scsi_cmnd *cmd;
1607 struct scb *scb;
1608 struct hardware_scb *hscb;
1609 struct ahc_initiator_tinfo *tinfo;
1610 struct ahc_tmode_tstate *tstate;
1611 uint16_t mask;
1612
1613 if ((dev->flags & AHC_DEV_ON_RUN_LIST) != 0)
1614 panic("running device on run list");
1615
1616 while ((acmd = TAILQ_FIRST(&dev->busyq)) != NULL
1617 && dev->openings > 0 && dev->qfrozen == 0) {
1618
1619 /*
1620 * Schedule us to run later. The only reason we are not
1621 * running is because the whole controller Q is frozen.
1622 */
1623 if (ahc->platform_data->qfrozen != 0) {
1624
1625 TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq,
1626 dev, links);
1627 dev->flags |= AHC_DEV_ON_RUN_LIST;
1628 return;
1629 }
1630 /*
1631 * Get an scb to use.
1632 */
1633 if ((scb = ahc_get_scb(ahc)) == NULL) {
1634 TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq,
1635 dev, links);
1636 dev->flags |= AHC_DEV_ON_RUN_LIST;
1637 ahc->flags |= AHC_RESOURCE_SHORTAGE;
1638 return;
1639 }
1640 TAILQ_REMOVE(&dev->busyq, acmd, acmd_links.tqe);
1641 cmd = &acmd_scsi_cmd(acmd);
1642 scb->io_ctx = cmd;
1643 scb->platform_data->dev = dev;
1644 hscb = scb->hscb;
1645 cmd->host_scribble = (char *)scb;
1646
1647 /*
1648 * Fill out basics of the HSCB.
1649 */
1650 hscb->control = 0;
1651 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1652 hscb->lun = cmd->lun;
1653 mask = SCB_GET_TARGET_MASK(ahc, scb);
1654 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1655 SCB_GET_OUR_ID(scb),
1656 SCB_GET_TARGET(ahc, scb), &tstate);
1657 hscb->scsirate = tinfo->scsirate;
1658 hscb->scsioffset = tinfo->curr.offset;
1659 if ((tstate->ultraenb & mask) != 0)
1660 hscb->control |= ULTRAENB;
1661
1662 if ((ahc->user_discenable & mask) != 0)
1663 hscb->control |= DISCENB;
1664
1665 if ((tstate->auto_negotiate & mask) != 0) {
1666 scb->flags |= SCB_AUTO_NEGOTIATE;
1667 scb->hscb->control |= MK_MESSAGE;
1668 }
1669
1670 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1671 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1672 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1673 hscb->control |= MSG_ORDERED_TASK;
1674 dev->commands_since_idle_or_otag = 0;
1675 } else {
1676 hscb->control |= MSG_SIMPLE_TASK;
1677 }
1678 }
1679
1680 hscb->cdb_len = cmd->cmd_len;
1681 if (hscb->cdb_len <= 12) {
1682 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1683 } else {
1684 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1685 scb->flags |= SCB_CDB32_PTR;
1686 }
1687
1688 scb->platform_data->xfer_len = 0;
1689 ahc_set_residual(scb, 0);
1690 ahc_set_sense_residual(scb, 0);
1691 if (cmd->use_sg != 0) {
1692 struct ahc_dma_seg *sg;
1693 struct scatterlist *cur_seg;
1694 struct scatterlist *end_seg;
1695 int nseg;
1696
1697 cur_seg = (struct scatterlist *)cmd->request_buffer;
1698 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
1699 scsi_to_pci_dma_dir(cmd ->sc_data_direction));
1700 end_seg = cur_seg + nseg;
1701 /* Copy the segments into the SG list. */
1702 sg = scb->sg_list;
1703 /*
1704 * The sg_count may be larger than nseg if
1705 * a transfer crosses a 32bit page.
1706 */
1707 scb->sg_count = 0;
1708 while(cur_seg < end_seg) {
1709 bus_addr_t addr;
1710 bus_size_t len;
1711 int consumed;
1712
1713 addr = sg_dma_address(cur_seg);
1714 len = sg_dma_len(cur_seg);
1715 consumed = ahc_linux_map_seg(ahc, scb,
1716 sg, addr, len);
1717 sg += consumed;
1718 scb->sg_count += consumed;
1719 cur_seg++;
1720 }
1721 sg--;
1722 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1723
1724 /*
1725 * Reset the sg list pointer.
1726 */
1727 scb->hscb->sgptr =
1728 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1729
1730 /*
1731 * Copy the first SG into the "current"
1732 * data pointer area.
1733 */
1734 scb->hscb->dataptr = scb->sg_list->addr;
1735 scb->hscb->datacnt = scb->sg_list->len;
1736 } else if (cmd->request_bufflen != 0) {
1737 struct ahc_dma_seg *sg;
1738 bus_addr_t addr;
1739
1740 sg = scb->sg_list;
1741 addr = pci_map_single(ahc->dev_softc,
1742 cmd->request_buffer,
1743 cmd->request_bufflen,
1744 scsi_to_pci_dma_dir(cmd->sc_data_direction));
1745 scb->sg_count = ahc_linux_map_seg(ahc, scb,
1746 sg, addr,
1747 cmd->request_bufflen);
1748 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1749
1750 /*
1751 * Reset the sg list pointer.
1752 */
1753 scb->hscb->sgptr =
1754 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1755
1756 /*
1757 * Copy the first SG into the "current"
1758 * data pointer area.
1759 */
1760 scb->hscb->dataptr = sg->addr;
1761 scb->hscb->datacnt = sg->len;
1762 } else {
1763 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1764 scb->hscb->dataptr = 0;
1765 scb->hscb->datacnt = 0;
1766 scb->sg_count = 0;
1767 }
1768
1769 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_PREWRITE);
1770 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1771 dev->openings--;
1772 dev->active++;
1773 dev->commands_issued++;
1774 dev->commands_since_idle_or_otag++;
1775
1776 /*
1777 * We only allow one untagged transaction
1778 * per target in the initiator role unless
1779 * we are storing a full busy target *lun*
1780 * table in SCB space.
1781 */
1782 if ((scb->hscb->control & (TARGET_SCB|TAG_ENB)) == 0
1783 && (ahc->features & AHC_SCB_BTT) == 0) {
1784 struct scb_tailq *untagged_q;
1785 int target_offset;
1786
1787 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1788 untagged_q = &(ahc->untagged_queues[target_offset]);
1789 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1790 scb->flags |= SCB_UNTAGGEDQ;
1791 if (TAILQ_FIRST(untagged_q) != scb)
1792 continue;
1793 }
1794 scb->flags |= SCB_ACTIVE;
1795 ahc_queue_scb(ahc, scb);
1796 }
1797 }
1798
1799 /*
1800 * SCSI controller interrupt handler.
1801 */
1802 void
1803 ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1804 {
1805 struct ahc_softc *ahc;
1806 struct ahc_cmd *acmd;
1807 u_long flags;
1808
1809 ahc = (struct ahc_softc *) dev_id;
1810 ahc_lock(ahc, &flags);
1811 ahc_intr(ahc);
1812 /*
1813 * It would be nice to run the device queues from a
1814 * bottom half handler, but as there is no way to
1815 * dynamically register one, we'll have to postpone
1816 * that until we get integrated into the kernel.
1817 */
1818 ahc_linux_run_device_queues(ahc);
1819 acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
1820 TAILQ_INIT(&ahc->platform_data->completeq);
1821 ahc_unlock(ahc, &flags);
1822 if (acmd != NULL)
1823 ahc_linux_run_complete_queue(ahc, acmd);
1824 }
1825
1826 void
1827 ahc_platform_flushwork(struct ahc_softc *ahc)
1828 {
1829 struct ahc_cmd *acmd;
1830
1831 acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
1832 TAILQ_INIT(&ahc->platform_data->completeq);
1833 if (acmd != NULL)
1834 ahc_linux_run_complete_queue(ahc, acmd);
1835 }
1836
1837 static struct ahc_linux_target*
1838 ahc_linux_alloc_target(struct ahc_softc *ahc, u_int channel, u_int target)
1839 {
1840 struct ahc_linux_target *targ;
1841 u_int target_offset;
1842
1843 targ = malloc(sizeof(*targ), M_DEVBUG, M_NOWAIT);
1844 if (targ == NULL)
1845 return (NULL);
1846 memset(targ, 0, sizeof(*targ));
1847 targ->channel = channel;
1848 targ->target = target;
1849 target_offset = target;
1850 if (channel != 0)
1851 target_offset += 8;
1852 ahc->platform_data->targets[target_offset] = targ;
1853 return (targ);
1854 }
1855
1856 static void
1857 ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ)
1858 {
1859 u_int target_offset;
1860
1861 target_offset = targ->target;
1862 if (targ->channel != 0)
1863 target_offset += 8;
1864 ahc->platform_data->targets[target_offset] = NULL;
1865 free(targ, M_DEVBUF);
1866 }
1867
1868 static struct ahc_linux_device*
1869 ahc_linux_alloc_device(struct ahc_softc *ahc,
1870 struct ahc_linux_target *targ, u_int lun)
1871 {
1872 struct ahc_linux_device *dev;
1873
1874 dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
1875 if (dev == NULL)
1876 return (NULL);
1877 memset(dev, 0, sizeof(*dev));
1878 TAILQ_INIT(&dev->busyq);
1879 dev->flags = AHC_DEV_UNCONFIGURED;
1880 dev->lun = lun;
1881 dev->target = targ;
1882
1883 /*
1884 * We start out life using untagged
1885 * transactions of which we allow one.
1886 */
1887 dev->openings = 1;
1888
1889 /*
1890 * Set maxtags to 0. This will be changed if we
1891 * later determine that we are dealing with
1892 * a tagged queuing capable device.
1893 */
1894 dev->maxtags = 0;
1895
1896 targ->refcount++;
1897 targ->devices[lun] = dev;
1898 return (dev);
1899 }
1900
1901 static void
1902 ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
1903 {
1904 struct ahc_linux_target *targ;
1905
1906 targ = dev->target;
1907 targ->devices[dev->lun] = NULL;
1908 free(dev, M_DEVBUF);
1909 targ->refcount--;
1910 if (targ->refcount == 0)
1911 ahc_linux_free_target(ahc, targ);
1912 }
1913
1914 /*
1915 * Return a string describing the driver.
1916 */
1917 const char *
1918 ahc_linux_info(struct Scsi_Host *host)
1919 {
1920 static char buffer[512];
1921 char ahc_info[256];
1922 char *bp;
1923 struct ahc_softc *ahc;
1924
1925 bp = &buffer[0];
1926 ahc = *(struct ahc_softc **)host->hostdata;
1927 memset(bp, 0, sizeof(buffer));
1928 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
1929 strcat(bp, AIC7XXX_DRIVER_VERSION);
1930 strcat(bp, "\n");
1931 strcat(bp, " <");
1932 strcat(bp, ahc->description);
1933 strcat(bp, ">\n");
1934 strcat(bp, " ");
1935 ahc_controller_info(ahc, ahc_info);
1936 strcat(bp, ahc_info);
1937 strcat(bp, "\n");
1938
1939 return (bp);
1940 }
1941
1942 void
1943 ahc_send_async(struct ahc_softc *ahc, char channel,
1944 u_int target, u_int lun, ac_code code, void *arg)
1945 {
1946 switch (code) {
1947 case AC_TRANSFER_NEG:
1948 {
1949 char buf[80];
1950 struct ahc_linux_target *targ;
1951 struct info_str info;
1952 struct ahc_initiator_tinfo *tinfo;
1953 struct ahc_tmode_tstate *tstate;
1954 int target_offset;
1955
1956 info.buffer = buf;
1957 info.length = sizeof(buf);
1958 info.offset = 0;
1959 info.pos = 0;
1960 tinfo = ahc_fetch_transinfo(ahc, channel,
1961 channel == 'A' ? ahc->our_id
1962 : ahc->our_id_b,
1963 target, &tstate);
1964
1965 /*
1966 * Don't bother reporting results while
1967 * negotiations are still pending.
1968 */
1969 if (tinfo->curr.period != tinfo->goal.period
1970 || tinfo->curr.width != tinfo->goal.width
1971 || tinfo->curr.offset != tinfo->goal.offset
1972 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1973 if (bootverbose == 0)
1974 break;
1975
1976 /*
1977 * Don't bother reporting results that
1978 * are identical to those last reported.
1979 */
1980 target_offset = target;
1981 if (channel == 'B')
1982 target_offset += 8;
1983 targ = ahc->platform_data->targets[target_offset];
1984 if (targ != NULL
1985 && tinfo->curr.period == targ->last_tinfo.period
1986 && tinfo->curr.width == targ->last_tinfo.width
1987 && tinfo->curr.offset == targ->last_tinfo.offset
1988 && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
1989 if (bootverbose == 0)
1990 break;
1991
1992 targ->last_tinfo.period = tinfo->curr.period;
1993 targ->last_tinfo.width = tinfo->curr.width;
1994 targ->last_tinfo.offset = tinfo->curr.offset;
1995 targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
1996
1997 printf("(%s:%c:", ahc_name(ahc), channel);
1998 if (target == CAM_TARGET_WILDCARD)
1999 printf("*): ");
2000 else
2001 printf("%d): ", target);
2002 ahc_format_transinfo(&info, &tinfo->curr);
2003 if (info.pos < info.length)
2004 *info.buffer = '\0';
2005 else
2006 buf[info.length - 1] = '\0';
2007 printf("%s", buf);
2008 break;
2009 }
2010 case AC_SENT_BDR:
2011 break;
2012 case AC_BUS_RESET:
2013 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
2014 if (ahc->platform_data->host != NULL) {
2015 scsi_report_bus_reset(ahc->platform_data->host,
2016 channel - 'A');
2017 }
2018 #endif
2019 break;
2020 default:
2021 panic("ahc_send_async: Unexpected async event");
2022 }
2023 }
2024
2025 /*
2026 * Calls the higher level scsi done function and frees the scb.
2027 */
2028 void
2029 ahc_done(struct ahc_softc *ahc, struct scb * scb)
2030 {
2031 Scsi_Cmnd *cmd;
2032 struct ahc_linux_device *dev;
2033
2034 LIST_REMOVE(scb, pending_links);
2035 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
2036 struct scb_tailq *untagged_q;
2037 int target_offset;
2038
2039 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
2040 untagged_q = &(ahc->untagged_queues[target_offset]);
2041 TAILQ_REMOVE(untagged_q, scb, links.tqe);
2042 ahc_run_untagged_queue(ahc, untagged_q);
2043 }
2044
2045 if ((scb->flags & SCB_ACTIVE) == 0) {
2046 printf("SCB %d done'd twice\n", scb->hscb->tag);
2047 ahc_dump_card_state(ahc);
2048 panic("Stopping for safety");
2049 }
2050 cmd = scb->io_ctx;
2051 dev = scb->platform_data->dev;
2052 dev->active--;
2053 dev->openings++;
2054 ahc_linux_unmap_scb(ahc, scb);
2055 if (scb->flags & SCB_SENSE) {
2056 memcpy(cmd->sense_buffer, ahc_get_sense_buf(ahc, scb),
2057 MIN(sizeof(struct scsi_sense_data),
2058 sizeof(cmd->sense_buffer)));
2059 cmd->result |= (DRIVER_SENSE << 24);
2060 } else {
2061 /*
2062 * Guard against stale sense data.
2063 * The Linux mid-layer assumes that sense
2064 * was retrieved anytime the first byte of
2065 * the sense buffer looks "sane".
2066 */
2067 cmd->sense_buffer[0] = 0;
2068 }
2069 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
2070 uint32_t amount_xferred;
2071
2072 amount_xferred =
2073 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
2074 if (amount_xferred < scb->io_ctx->underflow) {
2075 printf("Saw underflow (%ld of %ld bytes). "
2076 "Treated as error\n",
2077 ahc_get_residual(scb),
2078 ahc_get_transfer_length(scb));
2079 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
2080 } else {
2081 ahc_set_transaction_status(scb, CAM_REQ_CMP);
2082 ahc_linux_sniff_command(ahc, cmd, scb);
2083 }
2084 } else if (ahc_get_transaction_status(scb) == DID_OK) {
2085 ahc_linux_handle_scsi_status(ahc, dev, scb);
2086 } else if (ahc_get_transaction_status(scb) == DID_NO_CONNECT) {
2087 /*
2088 * Should a selection timeout kill the device?
2089 * That depends on whether the selection timeout
2090 * is persistent. Since we have no guarantee that
2091 * the mid-layer will issue an inquiry for this device
2092 * again, we can't just kill it off.
2093 dev->flags |= AHC_DEV_UNCONFIGURED;
2094 */
2095 }
2096
2097 if (dev->openings == 1
2098 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
2099 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
2100 dev->tag_success_count++;
2101 /*
2102 * Some devices deal with temporary internal resource
2103 * shortages by returning queue full. When the queue
2104 * full occurrs, we throttle back. Slowly try to get
2105 * back to our previous queue depth.
2106 */
2107 if ((dev->openings + dev->active) < dev->maxtags
2108 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
2109 dev->tag_success_count = 0;
2110 dev->openings++;
2111 }
2112
2113 if (dev->active == 0)
2114 dev->commands_since_idle_or_otag = 0;
2115
2116 if (TAILQ_EMPTY(&dev->busyq)) {
2117 if ((dev->flags & AHC_DEV_UNCONFIGURED) != 0
2118 && dev->active == 0)
2119 ahc_linux_free_device(ahc, dev);
2120 } else if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
2121 TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
2122 dev->flags |= AHC_DEV_ON_RUN_LIST;
2123 }
2124
2125 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
2126 printf("Recovery SCB completes\n");
2127 up(&ahc->platform_data->eh_sem);
2128 }
2129
2130 ahc_free_scb(ahc, scb);
2131 ahc_linux_queue_cmd_complete(ahc, cmd);
2132 }
2133
2134 static void
2135 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
2136 struct ahc_linux_device *dev, struct scb *scb)
2137 {
2138 /*
2139 * We don't currently trust the mid-layer to
2140 * properly deal with queue full or busy. So,
2141 * when one occurs, we tell the mid-layer to
2142 * unconditionally requeue the command to us
2143 * so that we can retry it ourselves. We also
2144 * implement our own throttling mechanism so
2145 * we don't clobber the device with too many
2146 * commands.
2147 */
2148 switch (ahc_get_scsi_status(scb)) {
2149 default:
2150 break;
2151 case SCSI_STATUS_QUEUE_FULL:
2152 {
2153 /*
2154 * By the time the core driver has returned this
2155 * command, all other commands that were queued
2156 * to us but not the device have been returned.
2157 * This ensures that dev->active is equal to
2158 * the number of commands actually queued to
2159 * the device.
2160 */
2161 dev->tag_success_count = 0;
2162 if (dev->active != 0) {
2163 /*
2164 * Drop our opening count to the number
2165 * of commands currently outstanding.
2166 */
2167 dev->openings = 0;
2168 /*
2169 ahc_print_path(ahc, scb);
2170 printf("Dropping tag count to %d\n", dev->active);
2171 */
2172 if (dev->active == dev->tags_on_last_queuefull) {
2173
2174 dev->last_queuefull_same_count++;
2175 /*
2176 * If we repeatedly see a queue full
2177 * at the same queue depth, this
2178 * device has a fixed number of tag
2179 * slots. Lock in this tag depth
2180 * so we stop seeing queue fulls from
2181 * this device.
2182 */
2183 if (dev->last_queuefull_same_count
2184 == AHC_LOCK_TAGS_COUNT) {
2185 dev->maxtags = dev->active;
2186 ahc_print_path(ahc, scb);
2187 printf("Locking max tag count at %d\n",
2188 dev->active);
2189 }
2190 } else {
2191 dev->tags_on_last_queuefull = dev->active;
2192 dev->last_queuefull_same_count = 0;
2193 }
2194 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
2195 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
2196 break;
2197 }
2198 /*
2199 * Drop down to a single opening, and treat this
2200 * as if the target return BUSY SCSI status.
2201 */
2202 dev->openings = 1;
2203 /* FALLTHROUGH */
2204 }
2205 case SCSI_STATUS_BUSY:
2206 /*
2207 * XXX Set a timer and handle ourselves????
2208 * For now we pray that the mid-layer does something
2209 * sane for devices that are busy.
2210 */
2211 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
2212 break;
2213 }
2214 }
2215
2216 static void
2217 ahc_linux_filter_command(struct ahc_softc *ahc, Scsi_Cmnd *cmd, struct scb *scb)
2218 {
2219 switch (cmd->cmnd[0]) {
2220 case INQUIRY:
2221 {
2222 struct ahc_devinfo devinfo;
2223 struct scsi_inquiry *inq;
2224 struct scsi_inquiry_data *sid;
2225 struct ahc_initiator_tinfo *targ_info;
2226 struct ahc_tmode_tstate *tstate;
2227 struct ahc_syncrate *syncrate;
2228 struct ahc_linux_device *dev;
2229 u_int scsiid;
2230 u_int maxsync;
2231 int transferred_len;
2232 int minlen;
2233 u_int width;
2234 u_int period;
2235 u_int offset;
2236 u_int ppr_options;
2237
2238 /*
2239 * Validate the command. We only want to filter
2240 * standard inquiry commands, not those querying
2241 * Vital Product Data.
2242 */
2243 inq = (struct scsi_inquiry *)cmd->cmnd;
2244 if ((inq->byte2 & SI_EVPD) != 0
2245 || inq->page_code != 0)
2246 break;
2247
2248 if (cmd->use_sg != 0) {
2249 printf("%s: SG Inquiry response ignored\n",
2250 ahc_name(ahc));
2251 break;
2252 }
2253 transferred_len = ahc_get_transfer_length(scb)
2254 - ahc_get_residual(scb);
2255 sid = (struct scsi_inquiry_data *)cmd->request_buffer;
2256
2257 /*
2258 * Determine if this lun actually exists. If so,
2259 * hold on to its corresponding device structure.
2260 * If not, make sure we release the device and
2261 * don't bother processing the rest of this inquiry
2262 * command.
2263 */
2264 dev = ahc_linux_get_device(ahc, cmd->channel,
2265 cmd->target, cmd->lun,
2266 /*alloc*/FALSE);
2267 if (transferred_len >= 1
2268 && SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) {
2269
2270 dev->flags &= ~AHC_DEV_UNCONFIGURED;
2271 } else {
2272 dev->flags |= AHC_DEV_UNCONFIGURED;
2273 break;
2274 }
2275
2276 /*
2277 * Update our notion of this device's transfer
2278 * negotiation capabilities.
2279 */
2280 scsiid = BUILD_SCSIID(ahc, cmd);
2281 ahc_compile_devinfo(&devinfo, SCSIID_OUR_ID(scsiid),
2282 cmd->target, cmd->lun,
2283 SCSIID_CHANNEL(ahc, scsiid),
2284 ROLE_INITIATOR);
2285 targ_info = ahc_fetch_transinfo(ahc, devinfo.channel,
2286 devinfo.our_scsiid,
2287 devinfo.target, &tstate);
2288 width = targ_info->user.width;
2289 period = targ_info->user.period;
2290 offset = targ_info->user.offset;
2291 ppr_options = targ_info->user.ppr_options;
2292 minlen = offsetof(struct scsi_inquiry_data, version) + 1;
2293 if (transferred_len >= minlen) {
2294 targ_info->curr.protocol_version = SID_ANSI_REV(sid);
2295
2296 /*
2297 * Only attempt SPI3 once we've verified that
2298 * the device claims to support SPI3 features.
2299 */
2300 if (targ_info->curr.protocol_version < SCSI_REV_2)
2301 targ_info->curr.transport_version =
2302 SID_ANSI_REV(sid);
2303 else
2304 targ_info->curr.transport_version =
2305 SCSI_REV_2;
2306 }
2307
2308 minlen = offsetof(struct scsi_inquiry_data, flags) + 1;
2309 if (transferred_len >= minlen
2310 && (sid->additional_length + 4) >= minlen) {
2311 if ((sid->flags & SID_WBus16) == 0)
2312 width = MSG_EXT_WDTR_BUS_8_BIT;
2313 if ((sid->flags & SID_Sync) == 0) {
2314 period = 0;
2315 offset = 0;
2316 ppr_options = 0;
2317 }
2318 } else {
2319 /* Keep current settings */
2320 break;
2321 }
2322 minlen = offsetof(struct scsi_inquiry_data, spi3data) + 1;
2323 /*
2324 * This is a kludge to deal with inquiry requests that
2325 * are not large enough for us to pull the spi3 bits.
2326 * In this case, we assume that a device that tells us
2327 * they can provide inquiry data that spans the SPI3
2328 * bits can handle a PPR request. If the inquiry
2329 * request has sufficient buffer space to cover these
2330 * bits, we check them to see if any ppr options are
2331 * available.
2332 */
2333 if ((sid->additional_length + 4) >= minlen) {
2334 if (transferred_len >= minlen
2335 && (sid->spi3data & SID_SPI_CLOCK_DT) == 0)
2336 ppr_options = 0;
2337
2338 if (targ_info->curr.protocol_version > SCSI_REV_2)
2339 targ_info->curr.transport_version = 3;
2340 } else {
2341 ppr_options = 0;
2342 }
2343 ahc_validate_width(ahc, /*tinfo limit*/NULL, &width,
2344 ROLE_UNKNOWN);
2345 if ((ahc->features & AHC_ULTRA2) != 0)
2346 maxsync = AHC_SYNCRATE_DT;
2347 else if ((ahc->features & AHC_ULTRA) != 0)
2348 maxsync = AHC_SYNCRATE_ULTRA;
2349 else
2350 maxsync = AHC_SYNCRATE_FAST;
2351
2352 syncrate = ahc_find_syncrate(ahc, &period,
2353 &ppr_options, maxsync);
2354 ahc_validate_offset(ahc, /*tinfo limit*/NULL, syncrate,
2355 &offset, width, ROLE_UNKNOWN);
2356 if (offset == 0 || period == 0) {
2357 period = 0;
2358 offset = 0;
2359 ppr_options = 0;
2360 }
2361 /* Apply our filtered user settings. */
2362 ahc_set_width(ahc, &devinfo, width,
2363 AHC_TRANS_GOAL, /*paused*/FALSE);
2364 ahc_set_syncrate(ahc, &devinfo, syncrate, period,
2365 offset, ppr_options, AHC_TRANS_GOAL,
2366 /*paused*/FALSE);
2367 break;
2368 }
2369 default:
2370 panic("ahc_linux_filter_command: Unexpected Command type %x\n",
2371 cmd->cmnd[0]);
2372 break;
2373 }
2374 }
2375
2376 static void
2377 ahc_linux_sem_timeout(u_long arg)
2378 {
2379 struct semaphore *sem;
2380
2381 sem = (struct semaphore *)arg;
2382 up(sem);
2383 }
2384
2385 static void
2386 ahc_linux_freeze_sim_queue(struct ahc_softc *ahc)
2387 {
2388 ahc->platform_data->qfrozen++;
2389 if (ahc->platform_data->qfrozen == 1)
2390 scsi_block_requests(ahc->platform_data->host);
2391 }
2392
2393 static void
2394 ahc_linux_release_sim_queue(u_long arg)
2395 {
2396 struct ahc_softc *ahc;
2397 u_long s;
2398 int unblock_reqs;
2399
2400 ahc = (struct ahc_softc *)arg;
2401 unblock_reqs = 0;
2402 ahc_lock(ahc, &s);
2403 if (ahc->platform_data->qfrozen > 0)
2404 ahc->platform_data->qfrozen--;
2405 if (ahc->platform_data->qfrozen == 0) {
2406 unblock_reqs = 1;
2407 ahc_linux_run_device_queues(ahc);
2408 }
2409 ahc_unlock(ahc, &s);
2410 /*
2411 * There is still a race here. The mid-layer
2412 * should keep its own freeze count and use
2413 * a bottom half handler to run the queues
2414 * so we can unblock with our own lock held.
2415 */
2416 if (unblock_reqs)
2417 scsi_unblock_requests(ahc->platform_data->host);
2418 }
2419
2420 static int
2421 ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag)
2422 {
2423 struct ahc_softc *ahc;
2424 struct ahc_cmd *acmd;
2425 struct ahc_cmd *list_acmd;
2426 struct ahc_linux_device *dev;
2427 struct scb *pending_scb;
2428 u_long s;
2429 u_int saved_scbptr;
2430 u_int active_scb_index;
2431 u_int last_phase;
2432 int retval;
2433 int paused;
2434 int wait;
2435 int disconnected;
2436
2437 paused = FALSE;
2438 wait = FALSE;
2439 ahc = *(struct ahc_softc **)cmd->host->hostdata;
2440 acmd = (struct ahc_cmd *)cmd;
2441
2442 printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
2443 ahc_name(ahc), cmd->channel, cmd->target, cmd->lun,
2444 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2445
2446 /*
2447 * It is a bug that the upper layer takes
2448 * this lock just prior to calling us.
2449 */
2450 spin_unlock_irq(&io_request_lock);
2451
2452 ahc_lock(ahc, &s);
2453
2454 /*
2455 * First determine if we currently own this command.
2456 * Start by searching the device queue. If not found
2457 * there, check the pending_scb list. If not found
2458 * at all, and the system wanted us to just abort the
2459 * command return success.
2460 */
2461 dev = ahc_linux_get_device(ahc, cmd->channel, cmd->target,
2462 cmd->lun, /*alloc*/FALSE);
2463
2464 if (dev == NULL) {
2465 /*
2466 * No target device for this command exists,
2467 * so we must not still own the command.
2468 */
2469 printf("%s:%d:%d:%d: Is not an active device\n",
2470 ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
2471 retval = SUCCESS;
2472 goto no_cmd;
2473 }
2474
2475 TAILQ_FOREACH(list_acmd, &dev->busyq, acmd_links.tqe) {
2476 if (list_acmd == acmd)
2477 break;
2478 }
2479
2480 if (list_acmd != NULL) {
2481 printf("%s:%d:%d:%d: Command found on device queue\n",
2482 ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
2483 if (flag == SCB_ABORT) {
2484 TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe);
2485 cmd->result = DID_ABORT << 16;
2486 ahc_linux_queue_cmd_complete(ahc, cmd);
2487 retval = SUCCESS;
2488 goto done;
2489 }
2490 }
2491
2492 /*
2493 * See if we can find a matching cmd in the pending list.
2494 */
2495 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2496 if (pending_scb->io_ctx == cmd)
2497 break;
2498 }
2499
2500 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2501
2502 /* Any SCB for this device will do for a target reset */
2503 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2504 if (ahc_match_scb(ahc, pending_scb, cmd->target,
2505 cmd->channel, CAM_LUN_WILDCARD,
2506 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2507 break;
2508 }
2509 }
2510
2511 if (pending_scb == NULL) {
2512 printf("%s:%d:%d:%d: Command not found\n",
2513 ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
2514 goto no_cmd;
2515 }
2516
2517 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2518 /*
2519 * We can't queue two recovery actions using the same SCB
2520 */
2521 retval = FAILED;
2522 goto done;
2523 }
2524
2525 /*
2526 * Ensure that the card doesn't do anything
2527 * behind our back. Also make sure that we
2528 * didn't "just" miss an interrupt that would
2529 * affect this cmd.
2530 */
2531 ahc->flags |= AHC_ALL_INTERRUPTS;
2532 do {
2533 ahc_intr(ahc);
2534 ahc_pause(ahc);
2535 ahc_clear_critical_section(ahc);
2536 } while (ahc_inb(ahc, INTSTAT) & INT_PEND);
2537 ahc->flags &= ~AHC_ALL_INTERRUPTS;
2538 paused = TRUE;
2539
2540 if (bootverbose)
2541 ahc_dump_card_state(ahc);
2542
2543 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2544 printf("%s:%d:%d:%d: Command already completed\n",
2545 ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
2546 goto no_cmd;
2547 }
2548
2549 disconnected = TRUE;
2550 if (flag == SCB_ABORT) {
2551 if (ahc_search_qinfifo(ahc, cmd->target, cmd->channel + 'A',
2552 cmd->lun, pending_scb->hscb->tag,
2553 ROLE_INITIATOR, CAM_REQ_ABORTED,
2554 SEARCH_COMPLETE) > 0) {
2555 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2556 ahc_name(ahc), cmd->channel, cmd->target,
2557 cmd->lun);
2558 retval = SUCCESS;
2559 goto done;
2560 }
2561 } else if (ahc_search_qinfifo(ahc, cmd->target, cmd->channel + 'A',
2562 cmd->lun, pending_scb->hscb->tag,
2563 ROLE_INITIATOR, /*status*/0,
2564 SEARCH_COUNT) > 0) {
2565 disconnected = FALSE;
2566 }
2567
2568 /*
2569 * At this point, pending_scb is the scb associated with the
2570 * passed in command. That command is currently active on the
2571 * bus, is in the disconnected state, or we're hoping to find
2572 * a command for the same target active on the bus to abuse to
2573 * send a BDR. Queue the appropriate message based on which of
2574 * these states we are in.
2575 */
2576 last_phase = ahc_inb(ahc, LASTPHASE);
2577 saved_scbptr = ahc_inb(ahc, SCBPTR);
2578 active_scb_index = ahc_inb(ahc, SCB_TAG);
2579 if (last_phase != P_BUSFREE
2580 && (pending_scb->hscb->tag == active_scb_index
2581 || (flag == SCB_DEVICE_RESET
2582 && SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID)) == cmd->target))) {
2583
2584 /*
2585 * We're active on the bus, so assert ATN
2586 * and hope that the target responds.
2587 */
2588 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2589 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2590 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2591 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2592 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2593 ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
2594 wait = TRUE;
2595 } else if (disconnected) {
2596
2597 /*
2598 * Actually re-queue this SCB in an attempt
2599 * to select the device before it reconnects.
2600 * In either case (selection or reselection),
2601 * we will now issue a the approprate message
2602 * to the timed-out device.
2603 *
2604 * Set the MK_MESSAGE control bit indicating
2605 * that we desire to send a message. We
2606 * also set the disconnected flag since
2607 * in the paging case there is no guarantee
2608 * that our SCB control byte matches the
2609 * version on the card. We don't want the
2610 * sequencer to abort the command thinking
2611 * an unsolicited reselection occurred.
2612 */
2613 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2614 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2615
2616 /*
2617 * Remove any cached copy of this SCB in the
2618 * disconnected list in preparation for the
2619 * queuing of our abort SCB. We use the
2620 * same element in the SCB, SCB_NEXT, for
2621 * both the qinfifo and the disconnected list.
2622 */
2623 ahc_search_disc_list(ahc, cmd->target, cmd->channel + 'A',
2624 cmd->lun, pending_scb->hscb->tag,
2625 /*stop_on_first*/TRUE,
2626 /*remove*/TRUE,
2627 /*save_state*/FALSE);
2628
2629 /*
2630 * In the non-paging case, the sequencer will
2631 * never re-reference the in-core SCB.
2632 * To make sure we are notified during
2633 * reslection, set the MK_MESSAGE flag in
2634 * the card's copy of the SCB.
2635 */
2636 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2637 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2638 ahc_outb(ahc, SCB_CONTROL,
2639 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2640 }
2641
2642 /*
2643 * Clear out any entries in the QINFIFO first
2644 * so we are the next SCB for this target
2645 * to run.
2646 */
2647 ahc_search_qinfifo(ahc, cmd->target, cmd->channel + 'A',
2648 cmd->lun, SCB_LIST_NULL, ROLE_INITIATOR,
2649 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2650 ahc_print_path(ahc, pending_scb);
2651 printf("Queuing a recovery SCB\n");
2652 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2653 ahc_outb(ahc, SCBPTR, saved_scbptr);
2654 printf("%s:%d:%d:%d: Device is disconnected, re-queuing SCB\n",
2655 ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
2656 wait = TRUE;
2657 } else {
2658 printf("%s:%d:%d:%d: Unable to deliver message\n",
2659 ahc_name(ahc), cmd->channel, cmd->target, cmd->lun);
2660 retval = FAILED;
2661 goto done;
2662 }
2663
2664 no_cmd:
2665 /*
2666 * Our assumption is that if we don't have the command, no
2667 * recovery action was required, so we return success. Again,
2668 * the semantics of the mid-layer recovery engine are not
2669 * well defined, so this may change in time.
2670 */
2671 retval = SUCCESS;
2672 done:
2673 if (paused)
2674 ahc_unpause(ahc);
2675 if (wait) {
2676 struct timer_list timer;
2677 int ret;
2678
2679 ahc_unlock(ahc, &s);
2680 init_timer(&timer);
2681 timer.data = (u_long)&ahc->platform_data->eh_sem;
2682 timer.expires = jiffies + (5 * HZ);
2683 timer.function = ahc_linux_sem_timeout;
2684 add_timer(&timer);
2685 printf("Recovery code sleeping\n");
2686 down(&ahc->platform_data->eh_sem);
2687 printf("Recovery code awake\n");
2688 ret = del_timer(&timer);
2689 if (ret == 0) {
2690 printf("Timer Expired\n");
2691 retval = FAILED;
2692 }
2693 ahc_lock(ahc, &s);
2694 }
2695 ahc_linux_run_device_queues(ahc);
2696 acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
2697 TAILQ_INIT(&ahc->platform_data->completeq);
2698 ahc_unlock(ahc, &s);
2699 if (acmd != NULL)
2700 ahc_linux_run_complete_queue(ahc, acmd);
2701 spin_lock_irq(&io_request_lock);
2702 return (retval);
2703 }
2704
2705 /*
2706 * Abort the current SCSI command(s).
2707 */
2708 int
2709 ahc_linux_abort(Scsi_Cmnd *cmd)
2710 {
2711 int error;
2712
2713 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
2714 if (error != 0)
2715 printf("aic7xxx_abort returns %d\n", error);
2716 return (error);
2717 }
2718
2719 /*
2720 * Attempt to send a target reset message to the device that timed out.
2721 */
2722 int
2723 ahc_linux_dev_reset(Scsi_Cmnd *cmd)
2724 {
2725 int error;
2726
2727 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
2728 if (error != 0)
2729 printf("aic7xxx_dev_reset returns %d\n", error);
2730 return (error);
2731 }
2732
2733 /*
2734 * Reset the SCSI bus.
2735 */
2736 int
2737 ahc_linux_bus_reset(Scsi_Cmnd *cmd)
2738 {
2739 struct ahc_softc *ahc;
2740 struct ahc_cmd *acmd;
2741 u_long s;
2742 int found;
2743
2744 /*
2745 * It is a bug that the upper layer takes
2746 * this lock just prior to calling us.
2747 */
2748 spin_unlock_irq(&io_request_lock);
2749
2750 ahc = *(struct ahc_softc **)cmd->host->hostdata;
2751 ahc_lock(ahc, &s);
2752 found = ahc_reset_channel(ahc, cmd->channel + 'A',
2753 /*initiate reset*/TRUE);
2754 acmd = TAILQ_FIRST(&ahc->platform_data->completeq);
2755 TAILQ_INIT(&ahc->platform_data->completeq);
2756 ahc_unlock(ahc, &s);
2757 if (bootverbose)
2758 printf("%s: SCSI bus reset delivered. "
2759 "%d SCBs aborted.\n", ahc_name(ahc), found);
2760
2761 if (acmd != NULL)
2762 ahc_linux_run_complete_queue(ahc, acmd);
2763
2764 spin_lock_irq(&io_request_lock);
2765 return SUCCESS;
2766 }
2767
2768 /*
2769 * Return the disk geometry for the given SCSI device.
2770 */
2771 int
2772 ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[])
2773 {
2774 int heads;
2775 int sectors;
2776 int cylinders;
2777 int ret;
2778 int extended;
2779 struct ahc_softc *ahc;
2780 struct buffer_head *bh;
2781
2782 ahc = *((struct ahc_softc **)disk->device->host->hostdata);
2783 bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024);
2784
2785 if (bh) {
2786 ret = scsi_partsize(bh, disk->capacity,
2787 &geom[2], &geom[0], &geom[1]);
2788 brelse(bh);
2789 if (ret != -1)
2790 return (ret);
2791 }
2792 heads = 64;
2793 sectors = 32;
2794 cylinders = disk->capacity / (heads * sectors);
2795
2796 if (disk->device->channel == 0)
2797 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
2798 else
2799 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
2800 if (extended && cylinders >= 1024) {
2801 heads = 255;
2802 sectors = 63;
2803 cylinders = disk->capacity / (heads * sectors);
2804 }
2805 geom[0] = heads;
2806 geom[1] = sectors;
2807 geom[2] = cylinders;
2808 return (0);
2809 }
2810
2811 /*
2812 * Free the passed in Scsi_Host memory structures prior to unloading the
2813 * module.
2814 */
2815 int
2816 ahc_linux_release(struct Scsi_Host * host)
2817 {
2818 struct ahc_softc *ahc;
2819
2820 if (host != NULL) {
2821
2822 ahc = *(struct ahc_softc **)host->hostdata;
2823 ahc_free(ahc);
2824 }
2825 if (TAILQ_EMPTY(&ahc_tailq)) {
2826 unregister_reboot_notifier(&ahc_linux_notifier);
2827 #ifdef CONFIG_PCI
2828 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
2829 pci_unregister_driver(&aic7xxx_pci_driver);
2830 #endif
2831 #endif
2832 }
2833 return (0);
2834 }
2835
2836 void
2837 ahc_platform_dump_card_state(struct ahc_softc *ahc)
2838 {
2839 struct ahc_linux_device *dev;
2840 int channel;
2841 int maxchannel;
2842 int target;
2843 int maxtarget;
2844 int lun;
2845 int i;
2846
2847 maxchannel = (ahc->features & AHC_TWIN) ? 1 : 0;
2848 maxtarget = (ahc->features & AHC_WIDE) ? 15 : 7;
2849 for (channel = 0; channel <= maxchannel; channel++) {
2850 for (target = 0; target <=maxtarget; target++) {
2851 for (lun = 0; lun < AHC_NUM_LUNS; lun++) {
2852 struct ahc_cmd *acmd;
2853
2854 dev = ahc_linux_get_device(ahc, channel, target,
2855 lun, /*alloc*/FALSE);
2856 if (dev == NULL)
2857 continue;
2858
2859 printf("DevQ(%d:%d:%d): ",
2860 channel, target, lun);
2861 i = 0;
2862 TAILQ_FOREACH(acmd, &dev->busyq,
2863 acmd_links.tqe) {
2864 if (i++ > 256)
2865 break;
2866 }
2867 printf("%d waiting\n", i);
2868 }
2869 }
2870 }
2871 }
2872
2873 #if defined(MODULE) || LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
2874 static Scsi_Host_Template driver_template = AIC7XXX;
2875 Scsi_Host_Template *aic7xxx_driver_template = &driver_template;
2876 #include "../scsi_module.c"
2877 #endif
2878