diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/aic7xxx/aic7xxx_osm.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/scsi/aic7xxx/aic7xxx_osm.c')
-rw-r--r-- | drivers/scsi/aic7xxx/aic7xxx_osm.c | 5043 |
1 files changed, 5043 insertions, 0 deletions
diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c new file mode 100644 index 000000000000..031c6aaa5ca5 --- /dev/null +++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c | |||
@@ -0,0 +1,5043 @@ | |||
1 | /* | ||
2 | * Adaptec AIC7xxx device driver for Linux. | ||
3 | * | ||
4 | * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $ | ||
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) 1994-2000 Justin T. Gibbs. | ||
42 | * Copyright (c) 2000-2001 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. Redistributions in binary form must reproduce at minimum a disclaimer | ||
52 | * substantially similar to the "NO WARRANTY" disclaimer below | ||
53 | * ("Disclaimer") and any redistribution must be conditioned upon | ||
54 | * including a substantially similar Disclaimer requirement for further | ||
55 | * binary redistribution. | ||
56 | * 3. Neither the names of the above-listed copyright holders nor the names | ||
57 | * of any contributors may be used to endorse or promote products derived | ||
58 | * from this software without specific prior written permission. | ||
59 | * | ||
60 | * Alternatively, this software may be distributed under the terms of the | ||
61 | * GNU General Public License ("GPL") version 2 as published by the Free | ||
62 | * Software Foundation. | ||
63 | * | ||
64 | * NO WARRANTY | ||
65 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
66 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
67 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | ||
68 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
69 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
70 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
71 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
72 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | ||
73 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | ||
74 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
75 | * POSSIBILITY OF SUCH DAMAGES. | ||
76 | * | ||
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=verbose | ||
91 | * | ||
92 | * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97 | ||
93 | * | ||
94 | * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp | ||
95 | */ | ||
96 | |||
97 | /* | ||
98 | * Further driver modifications made by Doug Ledford <dledford@redhat.com> | ||
99 | * | ||
100 | * Copyright (c) 1997-1999 Doug Ledford | ||
101 | * | ||
102 | * These changes are released under the same licensing terms as the FreeBSD | ||
103 | * driver written by Justin Gibbs. Please see his Copyright notice above | ||
104 | * for the exact terms and conditions covering my changes as well as the | ||
105 | * warranty statement. | ||
106 | * | ||
107 | * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include | ||
108 | * but are not limited to: | ||
109 | * | ||
110 | * 1: Import of the latest FreeBSD sequencer code for this driver | ||
111 | * 2: Modification of kernel code to accommodate different sequencer semantics | ||
112 | * 3: Extensive changes throughout kernel portion of driver to improve | ||
113 | * abort/reset processing and error hanndling | ||
114 | * 4: Other work contributed by various people on the Internet | ||
115 | * 5: Changes to printk information and verbosity selection code | ||
116 | * 6: General reliability related changes, especially in IRQ management | ||
117 | * 7: Modifications to the default probe/attach order for supported cards | ||
118 | * 8: SMP friendliness has been improved | ||
119 | * | ||
120 | */ | ||
121 | |||
122 | #include "aic7xxx_osm.h" | ||
123 | #include "aic7xxx_inline.h" | ||
124 | #include <scsi/scsicam.h> | ||
125 | |||
126 | /* | ||
127 | * Include aiclib.c as part of our | ||
128 | * "module dependencies are hard" work around. | ||
129 | */ | ||
130 | #include "aiclib.c" | ||
131 | |||
132 | #include <linux/init.h> /* __setup */ | ||
133 | |||
134 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | ||
135 | #include "sd.h" /* For geometry detection */ | ||
136 | #endif | ||
137 | |||
138 | #include <linux/mm.h> /* For fetching system memory size */ | ||
139 | #include <linux/blkdev.h> /* For block_size() */ | ||
140 | #include <linux/delay.h> /* For ssleep/msleep */ | ||
141 | |||
142 | /* | ||
143 | * Lock protecting manipulation of the ahc softc list. | ||
144 | */ | ||
145 | spinlock_t ahc_list_spinlock; | ||
146 | |||
147 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | ||
148 | /* For dynamic sglist size calculation. */ | ||
149 | u_int ahc_linux_nseg; | ||
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 | * DV option: | ||
275 | * | ||
276 | * positive value = DV Enabled | ||
277 | * zero = DV Disabled | ||
278 | * negative value = DV Default for adapter type/seeprom | ||
279 | */ | ||
280 | #ifdef CONFIG_AIC7XXX_DV_SETTING | ||
281 | #define AIC7XXX_CONFIGED_DV CONFIG_AIC7XXX_DV_SETTING | ||
282 | #else | ||
283 | #define AIC7XXX_CONFIGED_DV -1 | ||
284 | #endif | ||
285 | |||
286 | static int8_t aic7xxx_dv_settings[] = | ||
287 | { | ||
288 | AIC7XXX_CONFIGED_DV, | ||
289 | AIC7XXX_CONFIGED_DV, | ||
290 | AIC7XXX_CONFIGED_DV, | ||
291 | AIC7XXX_CONFIGED_DV, | ||
292 | AIC7XXX_CONFIGED_DV, | ||
293 | AIC7XXX_CONFIGED_DV, | ||
294 | AIC7XXX_CONFIGED_DV, | ||
295 | AIC7XXX_CONFIGED_DV, | ||
296 | AIC7XXX_CONFIGED_DV, | ||
297 | AIC7XXX_CONFIGED_DV, | ||
298 | AIC7XXX_CONFIGED_DV, | ||
299 | AIC7XXX_CONFIGED_DV, | ||
300 | AIC7XXX_CONFIGED_DV, | ||
301 | AIC7XXX_CONFIGED_DV, | ||
302 | AIC7XXX_CONFIGED_DV, | ||
303 | AIC7XXX_CONFIGED_DV | ||
304 | }; | ||
305 | |||
306 | /* | ||
307 | * There should be a specific return value for this in scsi.h, but | ||
308 | * it seems that most drivers ignore it. | ||
309 | */ | ||
310 | #define DID_UNDERFLOW DID_ERROR | ||
311 | |||
312 | void | ||
313 | ahc_print_path(struct ahc_softc *ahc, struct scb *scb) | ||
314 | { | ||
315 | printk("(scsi%d:%c:%d:%d): ", | ||
316 | ahc->platform_data->host->host_no, | ||
317 | scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', | ||
318 | scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, | ||
319 | scb != NULL ? SCB_GET_LUN(scb) : -1); | ||
320 | } | ||
321 | |||
322 | /* | ||
323 | * XXX - these options apply unilaterally to _all_ 274x/284x/294x | ||
324 | * cards in the system. This should be fixed. Exceptions to this | ||
325 | * rule are noted in the comments. | ||
326 | */ | ||
327 | |||
328 | /* | ||
329 | * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This | ||
330 | * has no effect on any later resets that might occur due to things like | ||
331 | * SCSI bus timeouts. | ||
332 | */ | ||
333 | static uint32_t aic7xxx_no_reset; | ||
334 | |||
335 | /* | ||
336 | * Certain PCI motherboards will scan PCI devices from highest to lowest, | ||
337 | * others scan from lowest to highest, and they tend to do all kinds of | ||
338 | * strange things when they come into contact with PCI bridge chips. The | ||
339 | * net result of all this is that the PCI card that is actually used to boot | ||
340 | * the machine is very hard to detect. Most motherboards go from lowest | ||
341 | * PCI slot number to highest, and the first SCSI controller found is the | ||
342 | * one you boot from. The only exceptions to this are when a controller | ||
343 | * has its BIOS disabled. So, we by default sort all of our SCSI controllers | ||
344 | * from lowest PCI slot number to highest PCI slot number. We also force | ||
345 | * all controllers with their BIOS disabled to the end of the list. This | ||
346 | * works on *almost* all computers. Where it doesn't work, we have this | ||
347 | * option. Setting this option to non-0 will reverse the order of the sort | ||
348 | * to highest first, then lowest, but will still leave cards with their BIOS | ||
349 | * disabled at the very end. That should fix everyone up unless there are | ||
350 | * really strange cirumstances. | ||
351 | */ | ||
352 | static uint32_t aic7xxx_reverse_scan; | ||
353 | |||
354 | /* | ||
355 | * Should we force EXTENDED translation on a controller. | ||
356 | * 0 == Use whatever is in the SEEPROM or default to off | ||
357 | * 1 == Use whatever is in the SEEPROM or default to on | ||
358 | */ | ||
359 | static uint32_t aic7xxx_extended; | ||
360 | |||
361 | /* | ||
362 | * PCI bus parity checking of the Adaptec controllers. This is somewhat | ||
363 | * dubious at best. To my knowledge, this option has never actually | ||
364 | * solved a PCI parity problem, but on certain machines with broken PCI | ||
365 | * chipset configurations where stray PCI transactions with bad parity are | ||
366 | * the norm rather than the exception, the error messages can be overwelming. | ||
367 | * It's included in the driver for completeness. | ||
368 | * 0 = Shut off PCI parity check | ||
369 | * non-0 = reverse polarity pci parity checking | ||
370 | */ | ||
371 | static uint32_t aic7xxx_pci_parity = ~0; | ||
372 | |||
373 | /* | ||
374 | * Certain newer motherboards have put new PCI based devices into the | ||
375 | * IO spaces that used to typically be occupied by VLB or EISA cards. | ||
376 | * This overlap can cause these newer motherboards to lock up when scanned | ||
377 | * for older EISA and VLB devices. Setting this option to non-0 will | ||
378 | * cause the driver to skip scanning for any VLB or EISA controllers and | ||
379 | * only support the PCI controllers. NOTE: this means that if the kernel | ||
380 | * os compiled with PCI support disabled, then setting this to non-0 | ||
381 | * would result in never finding any devices :) | ||
382 | */ | ||
383 | #ifndef CONFIG_AIC7XXX_PROBE_EISA_VL | ||
384 | uint32_t aic7xxx_probe_eisa_vl; | ||
385 | #else | ||
386 | uint32_t aic7xxx_probe_eisa_vl = ~0; | ||
387 | #endif | ||
388 | |||
389 | /* | ||
390 | * There are lots of broken chipsets in the world. Some of them will | ||
391 | * violate the PCI spec when we issue byte sized memory writes to our | ||
392 | * controller. I/O mapped register access, if allowed by the given | ||
393 | * platform, will work in almost all cases. | ||
394 | */ | ||
395 | uint32_t aic7xxx_allow_memio = ~0; | ||
396 | |||
397 | /* | ||
398 | * aic7xxx_detect() has been run, so register all device arrivals | ||
399 | * immediately with the system rather than deferring to the sorted | ||
400 | * attachment performed by aic7xxx_detect(). | ||
401 | */ | ||
402 | int aic7xxx_detect_complete; | ||
403 | |||
404 | /* | ||
405 | * So that we can set how long each device is given as a selection timeout. | ||
406 | * The table of values goes like this: | ||
407 | * 0 - 256ms | ||
408 | * 1 - 128ms | ||
409 | * 2 - 64ms | ||
410 | * 3 - 32ms | ||
411 | * We default to 256ms because some older devices need a longer time | ||
412 | * to respond to initial selection. | ||
413 | */ | ||
414 | static uint32_t aic7xxx_seltime; | ||
415 | |||
416 | /* | ||
417 | * Certain devices do not perform any aging on commands. Should the | ||
418 | * device be saturated by commands in one portion of the disk, it is | ||
419 | * possible for transactions on far away sectors to never be serviced. | ||
420 | * To handle these devices, we can periodically send an ordered tag to | ||
421 | * force all outstanding transactions to be serviced prior to a new | ||
422 | * transaction. | ||
423 | */ | ||
424 | uint32_t aic7xxx_periodic_otag; | ||
425 | |||
426 | /* | ||
427 | * Module information and settable options. | ||
428 | */ | ||
429 | static char *aic7xxx = NULL; | ||
430 | |||
431 | MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); | ||
432 | MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver"); | ||
433 | MODULE_LICENSE("Dual BSD/GPL"); | ||
434 | MODULE_VERSION(AIC7XXX_DRIVER_VERSION); | ||
435 | module_param(aic7xxx, charp, 0444); | ||
436 | MODULE_PARM_DESC(aic7xxx, | ||
437 | "period delimited, options string.\n" | ||
438 | " verbose Enable verbose/diagnostic logging\n" | ||
439 | " allow_memio Allow device registers to be memory mapped\n" | ||
440 | " debug Bitmask of debug values to enable\n" | ||
441 | " no_probe Toggle EISA/VLB controller probing\n" | ||
442 | " probe_eisa_vl Toggle EISA/VLB controller probing\n" | ||
443 | " no_reset Supress initial bus resets\n" | ||
444 | " extended Enable extended geometry on all controllers\n" | ||
445 | " periodic_otag Send an ordered tagged transaction\n" | ||
446 | " periodically to prevent tag starvation.\n" | ||
447 | " This may be required by some older disk\n" | ||
448 | " drives or RAID arrays.\n" | ||
449 | " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n" | ||
450 | " tag_info:<tag_str> Set per-target tag depth\n" | ||
451 | " global_tag_depth:<int> Global tag depth for every target\n" | ||
452 | " on every bus\n" | ||
453 | " dv:<dv_settings> Set per-controller Domain Validation Setting.\n" | ||
454 | " seltime:<int> Selection Timeout\n" | ||
455 | " (0/256ms,1/128ms,2/64ms,3/32ms)\n" | ||
456 | "\n" | ||
457 | " Sample /etc/modprobe.conf line:\n" | ||
458 | " Toggle EISA/VLB probing\n" | ||
459 | " Set tag depth on Controller 1/Target 1 to 10 tags\n" | ||
460 | " Shorten the selection timeout to 128ms\n" | ||
461 | "\n" | ||
462 | " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" | ||
463 | ); | ||
464 | |||
465 | static void ahc_linux_handle_scsi_status(struct ahc_softc *, | ||
466 | struct ahc_linux_device *, | ||
467 | struct scb *); | ||
468 | static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, | ||
469 | Scsi_Cmnd *cmd); | ||
470 | static void ahc_linux_filter_inquiry(struct ahc_softc*, struct ahc_devinfo*); | ||
471 | static void ahc_linux_sem_timeout(u_long arg); | ||
472 | static void ahc_linux_freeze_simq(struct ahc_softc *ahc); | ||
473 | static void ahc_linux_release_simq(u_long arg); | ||
474 | static void ahc_linux_dev_timed_unfreeze(u_long arg); | ||
475 | static int ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag); | ||
476 | static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); | ||
477 | static void ahc_linux_size_nseg(void); | ||
478 | static void ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc); | ||
479 | static void ahc_linux_start_dv(struct ahc_softc *ahc); | ||
480 | static void ahc_linux_dv_timeout(struct scsi_cmnd *cmd); | ||
481 | static int ahc_linux_dv_thread(void *data); | ||
482 | static void ahc_linux_kill_dv_thread(struct ahc_softc *ahc); | ||
483 | static void ahc_linux_dv_target(struct ahc_softc *ahc, u_int target); | ||
484 | static void ahc_linux_dv_transition(struct ahc_softc *ahc, | ||
485 | struct scsi_cmnd *cmd, | ||
486 | struct ahc_devinfo *devinfo, | ||
487 | struct ahc_linux_target *targ); | ||
488 | static void ahc_linux_dv_fill_cmd(struct ahc_softc *ahc, | ||
489 | struct scsi_cmnd *cmd, | ||
490 | struct ahc_devinfo *devinfo); | ||
491 | static void ahc_linux_dv_inq(struct ahc_softc *ahc, | ||
492 | struct scsi_cmnd *cmd, | ||
493 | struct ahc_devinfo *devinfo, | ||
494 | struct ahc_linux_target *targ, | ||
495 | u_int request_length); | ||
496 | static void ahc_linux_dv_tur(struct ahc_softc *ahc, | ||
497 | struct scsi_cmnd *cmd, | ||
498 | struct ahc_devinfo *devinfo); | ||
499 | static void ahc_linux_dv_rebd(struct ahc_softc *ahc, | ||
500 | struct scsi_cmnd *cmd, | ||
501 | struct ahc_devinfo *devinfo, | ||
502 | struct ahc_linux_target *targ); | ||
503 | static void ahc_linux_dv_web(struct ahc_softc *ahc, | ||
504 | struct scsi_cmnd *cmd, | ||
505 | struct ahc_devinfo *devinfo, | ||
506 | struct ahc_linux_target *targ); | ||
507 | static void ahc_linux_dv_reb(struct ahc_softc *ahc, | ||
508 | struct scsi_cmnd *cmd, | ||
509 | struct ahc_devinfo *devinfo, | ||
510 | struct ahc_linux_target *targ); | ||
511 | static void ahc_linux_dv_su(struct ahc_softc *ahc, | ||
512 | struct scsi_cmnd *cmd, | ||
513 | struct ahc_devinfo *devinfo, | ||
514 | struct ahc_linux_target *targ); | ||
515 | static int ahc_linux_fallback(struct ahc_softc *ahc, | ||
516 | struct ahc_devinfo *devinfo); | ||
517 | static void ahc_linux_dv_complete(Scsi_Cmnd *cmd); | ||
518 | static void ahc_linux_generate_dv_pattern(struct ahc_linux_target *targ); | ||
519 | static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, | ||
520 | struct ahc_devinfo *devinfo); | ||
521 | static u_int ahc_linux_user_dv_setting(struct ahc_softc *ahc); | ||
522 | static void ahc_linux_device_queue_depth(struct ahc_softc *ahc, | ||
523 | struct ahc_linux_device *dev); | ||
524 | static struct ahc_linux_target* ahc_linux_alloc_target(struct ahc_softc*, | ||
525 | u_int, u_int); | ||
526 | static void ahc_linux_free_target(struct ahc_softc*, | ||
527 | struct ahc_linux_target*); | ||
528 | static struct ahc_linux_device* ahc_linux_alloc_device(struct ahc_softc*, | ||
529 | struct ahc_linux_target*, | ||
530 | u_int); | ||
531 | static void ahc_linux_free_device(struct ahc_softc*, | ||
532 | struct ahc_linux_device*); | ||
533 | static void ahc_linux_run_device_queue(struct ahc_softc*, | ||
534 | struct ahc_linux_device*); | ||
535 | static void ahc_linux_setup_tag_info_global(char *p); | ||
536 | static aic_option_callback_t ahc_linux_setup_tag_info; | ||
537 | static aic_option_callback_t ahc_linux_setup_dv; | ||
538 | static int aic7xxx_setup(char *s); | ||
539 | static int ahc_linux_next_unit(void); | ||
540 | static void ahc_runq_tasklet(unsigned long data); | ||
541 | static struct ahc_cmd *ahc_linux_run_complete_queue(struct ahc_softc *ahc); | ||
542 | |||
543 | /********************************* Inlines ************************************/ | ||
544 | static __inline void ahc_schedule_runq(struct ahc_softc *ahc); | ||
545 | static __inline struct ahc_linux_device* | ||
546 | ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, | ||
547 | u_int target, u_int lun, int alloc); | ||
548 | static __inline void ahc_schedule_completeq(struct ahc_softc *ahc); | ||
549 | static __inline void ahc_linux_check_device_queue(struct ahc_softc *ahc, | ||
550 | struct ahc_linux_device *dev); | ||
551 | static __inline struct ahc_linux_device * | ||
552 | ahc_linux_next_device_to_run(struct ahc_softc *ahc); | ||
553 | static __inline void ahc_linux_run_device_queues(struct ahc_softc *ahc); | ||
554 | static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); | ||
555 | |||
556 | static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, | ||
557 | struct ahc_dma_seg *sg, | ||
558 | dma_addr_t addr, bus_size_t len); | ||
559 | |||
560 | static __inline void | ||
561 | ahc_schedule_completeq(struct ahc_softc *ahc) | ||
562 | { | ||
563 | if ((ahc->platform_data->flags & AHC_RUN_CMPLT_Q_TIMER) == 0) { | ||
564 | ahc->platform_data->flags |= AHC_RUN_CMPLT_Q_TIMER; | ||
565 | ahc->platform_data->completeq_timer.expires = jiffies; | ||
566 | add_timer(&ahc->platform_data->completeq_timer); | ||
567 | } | ||
568 | } | ||
569 | |||
570 | /* | ||
571 | * Must be called with our lock held. | ||
572 | */ | ||
573 | static __inline void | ||
574 | ahc_schedule_runq(struct ahc_softc *ahc) | ||
575 | { | ||
576 | tasklet_schedule(&ahc->platform_data->runq_tasklet); | ||
577 | } | ||
578 | |||
579 | static __inline struct ahc_linux_device* | ||
580 | ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target, | ||
581 | u_int lun, int alloc) | ||
582 | { | ||
583 | struct ahc_linux_target *targ; | ||
584 | struct ahc_linux_device *dev; | ||
585 | u_int target_offset; | ||
586 | |||
587 | target_offset = target; | ||
588 | if (channel != 0) | ||
589 | target_offset += 8; | ||
590 | targ = ahc->platform_data->targets[target_offset]; | ||
591 | if (targ == NULL) { | ||
592 | if (alloc != 0) { | ||
593 | targ = ahc_linux_alloc_target(ahc, channel, target); | ||
594 | if (targ == NULL) | ||
595 | return (NULL); | ||
596 | } else | ||
597 | return (NULL); | ||
598 | } | ||
599 | dev = targ->devices[lun]; | ||
600 | if (dev == NULL && alloc != 0) | ||
601 | dev = ahc_linux_alloc_device(ahc, targ, lun); | ||
602 | return (dev); | ||
603 | } | ||
604 | |||
605 | #define AHC_LINUX_MAX_RETURNED_ERRORS 4 | ||
606 | static struct ahc_cmd * | ||
607 | ahc_linux_run_complete_queue(struct ahc_softc *ahc) | ||
608 | { | ||
609 | struct ahc_cmd *acmd; | ||
610 | u_long done_flags; | ||
611 | int with_errors; | ||
612 | |||
613 | with_errors = 0; | ||
614 | ahc_done_lock(ahc, &done_flags); | ||
615 | while ((acmd = TAILQ_FIRST(&ahc->platform_data->completeq)) != NULL) { | ||
616 | Scsi_Cmnd *cmd; | ||
617 | |||
618 | if (with_errors > AHC_LINUX_MAX_RETURNED_ERRORS) { | ||
619 | /* | ||
620 | * Linux uses stack recursion to requeue | ||
621 | * commands that need to be retried. Avoid | ||
622 | * blowing out the stack by "spoon feeding" | ||
623 | * commands that completed with error back | ||
624 | * the operating system in case they are going | ||
625 | * to be retried. "ick" | ||
626 | */ | ||
627 | ahc_schedule_completeq(ahc); | ||
628 | break; | ||
629 | } | ||
630 | TAILQ_REMOVE(&ahc->platform_data->completeq, | ||
631 | acmd, acmd_links.tqe); | ||
632 | cmd = &acmd_scsi_cmd(acmd); | ||
633 | cmd->host_scribble = NULL; | ||
634 | if (ahc_cmd_get_transaction_status(cmd) != DID_OK | ||
635 | || (cmd->result & 0xFF) != SCSI_STATUS_OK) | ||
636 | with_errors++; | ||
637 | |||
638 | cmd->scsi_done(cmd); | ||
639 | } | ||
640 | ahc_done_unlock(ahc, &done_flags); | ||
641 | return (acmd); | ||
642 | } | ||
643 | |||
644 | static __inline void | ||
645 | ahc_linux_check_device_queue(struct ahc_softc *ahc, | ||
646 | struct ahc_linux_device *dev) | ||
647 | { | ||
648 | if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) != 0 | ||
649 | && dev->active == 0) { | ||
650 | dev->flags &= ~AHC_DEV_FREEZE_TIL_EMPTY; | ||
651 | dev->qfrozen--; | ||
652 | } | ||
653 | |||
654 | if (TAILQ_FIRST(&dev->busyq) == NULL | ||
655 | || dev->openings == 0 || dev->qfrozen != 0) | ||
656 | return; | ||
657 | |||
658 | ahc_linux_run_device_queue(ahc, dev); | ||
659 | } | ||
660 | |||
661 | static __inline struct ahc_linux_device * | ||
662 | ahc_linux_next_device_to_run(struct ahc_softc *ahc) | ||
663 | { | ||
664 | |||
665 | if ((ahc->flags & AHC_RESOURCE_SHORTAGE) != 0 | ||
666 | || (ahc->platform_data->qfrozen != 0 | ||
667 | && AHC_DV_SIMQ_FROZEN(ahc) == 0)) | ||
668 | return (NULL); | ||
669 | return (TAILQ_FIRST(&ahc->platform_data->device_runq)); | ||
670 | } | ||
671 | |||
672 | static __inline void | ||
673 | ahc_linux_run_device_queues(struct ahc_softc *ahc) | ||
674 | { | ||
675 | struct ahc_linux_device *dev; | ||
676 | |||
677 | while ((dev = ahc_linux_next_device_to_run(ahc)) != NULL) { | ||
678 | TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links); | ||
679 | dev->flags &= ~AHC_DEV_ON_RUN_LIST; | ||
680 | ahc_linux_check_device_queue(ahc, dev); | ||
681 | } | ||
682 | } | ||
683 | |||
684 | static __inline void | ||
685 | ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) | ||
686 | { | ||
687 | Scsi_Cmnd *cmd; | ||
688 | |||
689 | cmd = scb->io_ctx; | ||
690 | ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); | ||
691 | if (cmd->use_sg != 0) { | ||
692 | struct scatterlist *sg; | ||
693 | |||
694 | sg = (struct scatterlist *)cmd->request_buffer; | ||
695 | pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg, | ||
696 | scsi_to_pci_dma_dir(cmd->sc_data_direction)); | ||
697 | } else if (cmd->request_bufflen != 0) { | ||
698 | pci_unmap_single(ahc->dev_softc, | ||
699 | scb->platform_data->buf_busaddr, | ||
700 | cmd->request_bufflen, | ||
701 | scsi_to_pci_dma_dir(cmd->sc_data_direction)); | ||
702 | } | ||
703 | } | ||
704 | |||
705 | static __inline int | ||
706 | ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, | ||
707 | struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) | ||
708 | { | ||
709 | int consumed; | ||
710 | |||
711 | if ((scb->sg_count + 1) > AHC_NSEG) | ||
712 | panic("Too few segs for dma mapping. " | ||
713 | "Increase AHC_NSEG\n"); | ||
714 | |||
715 | consumed = 1; | ||
716 | sg->addr = ahc_htole32(addr & 0xFFFFFFFF); | ||
717 | scb->platform_data->xfer_len += len; | ||
718 | |||
719 | if (sizeof(dma_addr_t) > 4 | ||
720 | && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) | ||
721 | len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; | ||
722 | |||
723 | sg->len = ahc_htole32(len); | ||
724 | return (consumed); | ||
725 | } | ||
726 | |||
727 | /************************ Host template entry points *************************/ | ||
728 | static int ahc_linux_detect(Scsi_Host_Template *); | ||
729 | static int ahc_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *)); | ||
730 | static const char *ahc_linux_info(struct Scsi_Host *); | ||
731 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
732 | static int ahc_linux_slave_alloc(Scsi_Device *); | ||
733 | static int ahc_linux_slave_configure(Scsi_Device *); | ||
734 | static void ahc_linux_slave_destroy(Scsi_Device *); | ||
735 | #if defined(__i386__) | ||
736 | static int ahc_linux_biosparam(struct scsi_device*, | ||
737 | struct block_device*, | ||
738 | sector_t, int[]); | ||
739 | #endif | ||
740 | #else | ||
741 | static int ahc_linux_release(struct Scsi_Host *); | ||
742 | static void ahc_linux_select_queue_depth(struct Scsi_Host *host, | ||
743 | Scsi_Device *scsi_devs); | ||
744 | #if defined(__i386__) | ||
745 | static int ahc_linux_biosparam(Disk *, kdev_t, int[]); | ||
746 | #endif | ||
747 | #endif | ||
748 | static int ahc_linux_bus_reset(Scsi_Cmnd *); | ||
749 | static int ahc_linux_dev_reset(Scsi_Cmnd *); | ||
750 | static int ahc_linux_abort(Scsi_Cmnd *); | ||
751 | |||
752 | /* | ||
753 | * Calculate a safe value for AHC_NSEG (as expressed through ahc_linux_nseg). | ||
754 | * | ||
755 | * In pre-2.5.X... | ||
756 | * The midlayer allocates an S/G array dynamically when a command is issued | ||
757 | * using SCSI malloc. This array, which is in an OS dependent format that | ||
758 | * must later be copied to our private S/G list, is sized to house just the | ||
759 | * number of segments needed for the current transfer. Since the code that | ||
760 | * sizes the SCSI malloc pool does not take into consideration fragmentation | ||
761 | * of the pool, executing transactions numbering just a fraction of our | ||
762 | * concurrent transaction limit with list lengths aproaching AHC_NSEG will | ||
763 | * quickly depleat the SCSI malloc pool of usable space. Unfortunately, the | ||
764 | * mid-layer does not properly handle this scsi malloc failures for the S/G | ||
765 | * array and the result can be a lockup of the I/O subsystem. We try to size | ||
766 | * our S/G list so that it satisfies our drivers allocation requirements in | ||
767 | * addition to avoiding fragmentation of the SCSI malloc pool. | ||
768 | */ | ||
769 | static void | ||
770 | ahc_linux_size_nseg(void) | ||
771 | { | ||
772 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | ||
773 | u_int cur_size; | ||
774 | u_int best_size; | ||
775 | |||
776 | /* | ||
777 | * The SCSI allocator rounds to the nearest 512 bytes | ||
778 | * an cannot allocate across a page boundary. Our algorithm | ||
779 | * is to start at 1K of scsi malloc space per-command and | ||
780 | * loop through all factors of the PAGE_SIZE and pick the best. | ||
781 | */ | ||
782 | best_size = 0; | ||
783 | for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) { | ||
784 | u_int nseg; | ||
785 | |||
786 | nseg = cur_size / sizeof(struct scatterlist); | ||
787 | if (nseg < AHC_LINUX_MIN_NSEG) | ||
788 | continue; | ||
789 | |||
790 | if (best_size == 0) { | ||
791 | best_size = cur_size; | ||
792 | ahc_linux_nseg = nseg; | ||
793 | } else { | ||
794 | u_int best_rem; | ||
795 | u_int cur_rem; | ||
796 | |||
797 | /* | ||
798 | * Compare the traits of the current "best_size" | ||
799 | * with the current size to determine if the | ||
800 | * current size is a better size. | ||
801 | */ | ||
802 | best_rem = best_size % sizeof(struct scatterlist); | ||
803 | cur_rem = cur_size % sizeof(struct scatterlist); | ||
804 | if (cur_rem < best_rem) { | ||
805 | best_size = cur_size; | ||
806 | ahc_linux_nseg = nseg; | ||
807 | } | ||
808 | } | ||
809 | } | ||
810 | #endif | ||
811 | } | ||
812 | |||
813 | /* | ||
814 | * Try to detect an Adaptec 7XXX controller. | ||
815 | */ | ||
816 | static int | ||
817 | ahc_linux_detect(Scsi_Host_Template *template) | ||
818 | { | ||
819 | struct ahc_softc *ahc; | ||
820 | int found = 0; | ||
821 | |||
822 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | ||
823 | /* | ||
824 | * It is a bug that the upper layer takes | ||
825 | * this lock just prior to calling us. | ||
826 | */ | ||
827 | spin_unlock_irq(&io_request_lock); | ||
828 | #endif | ||
829 | |||
830 | /* | ||
831 | * Sanity checking of Linux SCSI data structures so | ||
832 | * that some of our hacks^H^H^H^H^Hassumptions aren't | ||
833 | * violated. | ||
834 | */ | ||
835 | if (offsetof(struct ahc_cmd_internal, end) | ||
836 | > offsetof(struct scsi_cmnd, host_scribble)) { | ||
837 | printf("ahc_linux_detect: SCSI data structures changed.\n"); | ||
838 | printf("ahc_linux_detect: Unable to attach\n"); | ||
839 | return (0); | ||
840 | } | ||
841 | ahc_linux_size_nseg(); | ||
842 | /* | ||
843 | * If we've been passed any parameters, process them now. | ||
844 | */ | ||
845 | if (aic7xxx) | ||
846 | aic7xxx_setup(aic7xxx); | ||
847 | |||
848 | template->proc_name = "aic7xxx"; | ||
849 | |||
850 | /* | ||
851 | * Initialize our softc list lock prior to | ||
852 | * probing for any adapters. | ||
853 | */ | ||
854 | ahc_list_lockinit(); | ||
855 | |||
856 | found = ahc_linux_pci_init(); | ||
857 | if (!ahc_linux_eisa_init()) | ||
858 | found++; | ||
859 | |||
860 | /* | ||
861 | * Register with the SCSI layer all | ||
862 | * controllers we've found. | ||
863 | */ | ||
864 | TAILQ_FOREACH(ahc, &ahc_tailq, links) { | ||
865 | |||
866 | if (ahc_linux_register_host(ahc, template) == 0) | ||
867 | found++; | ||
868 | } | ||
869 | |||
870 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | ||
871 | spin_lock_irq(&io_request_lock); | ||
872 | #endif | ||
873 | aic7xxx_detect_complete++; | ||
874 | |||
875 | return (found); | ||
876 | } | ||
877 | |||
878 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | ||
879 | /* | ||
880 | * Free the passed in Scsi_Host memory structures prior to unloading the | ||
881 | * module. | ||
882 | */ | ||
883 | int | ||
884 | ahc_linux_release(struct Scsi_Host * host) | ||
885 | { | ||
886 | struct ahc_softc *ahc; | ||
887 | u_long l; | ||
888 | |||
889 | ahc_list_lock(&l); | ||
890 | if (host != NULL) { | ||
891 | |||
892 | /* | ||
893 | * We should be able to just perform | ||
894 | * the free directly, but check our | ||
895 | * list for extra sanity. | ||
896 | */ | ||
897 | ahc = ahc_find_softc(*(struct ahc_softc **)host->hostdata); | ||
898 | if (ahc != NULL) { | ||
899 | u_long s; | ||
900 | |||
901 | ahc_lock(ahc, &s); | ||
902 | ahc_intr_enable(ahc, FALSE); | ||
903 | ahc_unlock(ahc, &s); | ||
904 | ahc_free(ahc); | ||
905 | } | ||
906 | } | ||
907 | ahc_list_unlock(&l); | ||
908 | return (0); | ||
909 | } | ||
910 | #endif | ||
911 | |||
912 | /* | ||
913 | * Return a string describing the driver. | ||
914 | */ | ||
915 | static const char * | ||
916 | ahc_linux_info(struct Scsi_Host *host) | ||
917 | { | ||
918 | static char buffer[512]; | ||
919 | char ahc_info[256]; | ||
920 | char *bp; | ||
921 | struct ahc_softc *ahc; | ||
922 | |||
923 | bp = &buffer[0]; | ||
924 | ahc = *(struct ahc_softc **)host->hostdata; | ||
925 | memset(bp, 0, sizeof(buffer)); | ||
926 | strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev "); | ||
927 | strcat(bp, AIC7XXX_DRIVER_VERSION); | ||
928 | strcat(bp, "\n"); | ||
929 | strcat(bp, " <"); | ||
930 | strcat(bp, ahc->description); | ||
931 | strcat(bp, ">\n"); | ||
932 | strcat(bp, " "); | ||
933 | ahc_controller_info(ahc, ahc_info); | ||
934 | strcat(bp, ahc_info); | ||
935 | strcat(bp, "\n"); | ||
936 | |||
937 | return (bp); | ||
938 | } | ||
939 | |||
940 | /* | ||
941 | * Queue an SCB to the controller. | ||
942 | */ | ||
943 | static int | ||
944 | ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *)) | ||
945 | { | ||
946 | struct ahc_softc *ahc; | ||
947 | struct ahc_linux_device *dev; | ||
948 | u_long flags; | ||
949 | |||
950 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | ||
951 | |||
952 | /* | ||
953 | * Save the callback on completion function. | ||
954 | */ | ||
955 | cmd->scsi_done = scsi_done; | ||
956 | |||
957 | ahc_midlayer_entrypoint_lock(ahc, &flags); | ||
958 | |||
959 | /* | ||
960 | * Close the race of a command that was in the process of | ||
961 | * being queued to us just as our simq was frozen. Let | ||
962 | * DV commands through so long as we are only frozen to | ||
963 | * perform DV. | ||
964 | */ | ||
965 | if (ahc->platform_data->qfrozen != 0 | ||
966 | && AHC_DV_CMD(cmd) == 0) { | ||
967 | |||
968 | ahc_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ); | ||
969 | ahc_linux_queue_cmd_complete(ahc, cmd); | ||
970 | ahc_schedule_completeq(ahc); | ||
971 | ahc_midlayer_entrypoint_unlock(ahc, &flags); | ||
972 | return (0); | ||
973 | } | ||
974 | dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id, | ||
975 | cmd->device->lun, /*alloc*/TRUE); | ||
976 | if (dev == NULL) { | ||
977 | ahc_cmd_set_transaction_status(cmd, CAM_RESRC_UNAVAIL); | ||
978 | ahc_linux_queue_cmd_complete(ahc, cmd); | ||
979 | ahc_schedule_completeq(ahc); | ||
980 | ahc_midlayer_entrypoint_unlock(ahc, &flags); | ||
981 | printf("%s: aic7xxx_linux_queue - Unable to allocate device!\n", | ||
982 | ahc_name(ahc)); | ||
983 | return (0); | ||
984 | } | ||
985 | cmd->result = CAM_REQ_INPROG << 16; | ||
986 | TAILQ_INSERT_TAIL(&dev->busyq, (struct ahc_cmd *)cmd, acmd_links.tqe); | ||
987 | if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) { | ||
988 | TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links); | ||
989 | dev->flags |= AHC_DEV_ON_RUN_LIST; | ||
990 | ahc_linux_run_device_queues(ahc); | ||
991 | } | ||
992 | ahc_midlayer_entrypoint_unlock(ahc, &flags); | ||
993 | return (0); | ||
994 | } | ||
995 | |||
996 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
997 | static int | ||
998 | ahc_linux_slave_alloc(Scsi_Device *device) | ||
999 | { | ||
1000 | struct ahc_softc *ahc; | ||
1001 | |||
1002 | ahc = *((struct ahc_softc **)device->host->hostdata); | ||
1003 | if (bootverbose) | ||
1004 | printf("%s: Slave Alloc %d\n", ahc_name(ahc), device->id); | ||
1005 | return (0); | ||
1006 | } | ||
1007 | |||
1008 | static int | ||
1009 | ahc_linux_slave_configure(Scsi_Device *device) | ||
1010 | { | ||
1011 | struct ahc_softc *ahc; | ||
1012 | struct ahc_linux_device *dev; | ||
1013 | u_long flags; | ||
1014 | |||
1015 | ahc = *((struct ahc_softc **)device->host->hostdata); | ||
1016 | if (bootverbose) | ||
1017 | printf("%s: Slave Configure %d\n", ahc_name(ahc), device->id); | ||
1018 | ahc_midlayer_entrypoint_lock(ahc, &flags); | ||
1019 | /* | ||
1020 | * Since Linux has attached to the device, configure | ||
1021 | * it so we don't free and allocate the device | ||
1022 | * structure on every command. | ||
1023 | */ | ||
1024 | dev = ahc_linux_get_device(ahc, device->channel, | ||
1025 | device->id, device->lun, | ||
1026 | /*alloc*/TRUE); | ||
1027 | if (dev != NULL) { | ||
1028 | dev->flags &= ~AHC_DEV_UNCONFIGURED; | ||
1029 | dev->scsi_device = device; | ||
1030 | ahc_linux_device_queue_depth(ahc, dev); | ||
1031 | } | ||
1032 | ahc_midlayer_entrypoint_unlock(ahc, &flags); | ||
1033 | return (0); | ||
1034 | } | ||
1035 | |||
1036 | static void | ||
1037 | ahc_linux_slave_destroy(Scsi_Device *device) | ||
1038 | { | ||
1039 | struct ahc_softc *ahc; | ||
1040 | struct ahc_linux_device *dev; | ||
1041 | u_long flags; | ||
1042 | |||
1043 | ahc = *((struct ahc_softc **)device->host->hostdata); | ||
1044 | if (bootverbose) | ||
1045 | printf("%s: Slave Destroy %d\n", ahc_name(ahc), device->id); | ||
1046 | ahc_midlayer_entrypoint_lock(ahc, &flags); | ||
1047 | dev = ahc_linux_get_device(ahc, device->channel, | ||
1048 | device->id, device->lun, | ||
1049 | /*alloc*/FALSE); | ||
1050 | /* | ||
1051 | * Filter out "silly" deletions of real devices by only | ||
1052 | * deleting devices that have had slave_configure() | ||
1053 | * called on them. All other devices that have not | ||
1054 | * been configured will automatically be deleted by | ||
1055 | * the refcounting process. | ||
1056 | */ | ||
1057 | if (dev != NULL | ||
1058 | && (dev->flags & AHC_DEV_SLAVE_CONFIGURED) != 0) { | ||
1059 | dev->flags |= AHC_DEV_UNCONFIGURED; | ||
1060 | if (TAILQ_EMPTY(&dev->busyq) | ||
1061 | && dev->active == 0 | ||
1062 | && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0) | ||
1063 | ahc_linux_free_device(ahc, dev); | ||
1064 | } | ||
1065 | ahc_midlayer_entrypoint_unlock(ahc, &flags); | ||
1066 | } | ||
1067 | #else | ||
1068 | /* | ||
1069 | * Sets the queue depth for each SCSI device hanging | ||
1070 | * off the input host adapter. | ||
1071 | */ | ||
1072 | static void | ||
1073 | ahc_linux_select_queue_depth(struct Scsi_Host *host, Scsi_Device *scsi_devs) | ||
1074 | { | ||
1075 | Scsi_Device *device; | ||
1076 | Scsi_Device *ldev; | ||
1077 | struct ahc_softc *ahc; | ||
1078 | u_long flags; | ||
1079 | |||
1080 | ahc = *((struct ahc_softc **)host->hostdata); | ||
1081 | ahc_lock(ahc, &flags); | ||
1082 | for (device = scsi_devs; device != NULL; device = device->next) { | ||
1083 | |||
1084 | /* | ||
1085 | * Watch out for duplicate devices. This works around | ||
1086 | * some quirks in how the SCSI scanning code does its | ||
1087 | * device management. | ||
1088 | */ | ||
1089 | for (ldev = scsi_devs; ldev != device; ldev = ldev->next) { | ||
1090 | if (ldev->host == device->host | ||
1091 | && ldev->channel == device->channel | ||
1092 | && ldev->id == device->id | ||
1093 | && ldev->lun == device->lun) | ||
1094 | break; | ||
1095 | } | ||
1096 | /* Skip duplicate. */ | ||
1097 | if (ldev != device) | ||
1098 | continue; | ||
1099 | |||
1100 | if (device->host == host) { | ||
1101 | struct ahc_linux_device *dev; | ||
1102 | |||
1103 | /* | ||
1104 | * Since Linux has attached to the device, configure | ||
1105 | * it so we don't free and allocate the device | ||
1106 | * structure on every command. | ||
1107 | */ | ||
1108 | dev = ahc_linux_get_device(ahc, device->channel, | ||
1109 | device->id, device->lun, | ||
1110 | /*alloc*/TRUE); | ||
1111 | if (dev != NULL) { | ||
1112 | dev->flags &= ~AHC_DEV_UNCONFIGURED; | ||
1113 | dev->scsi_device = device; | ||
1114 | ahc_linux_device_queue_depth(ahc, dev); | ||
1115 | device->queue_depth = dev->openings | ||
1116 | + dev->active; | ||
1117 | if ((dev->flags & (AHC_DEV_Q_BASIC | ||
1118 | | AHC_DEV_Q_TAGGED)) == 0) { | ||
1119 | /* | ||
1120 | * We allow the OS to queue 2 untagged | ||
1121 | * transactions to us at any time even | ||
1122 | * though we can only execute them | ||
1123 | * serially on the controller/device. | ||
1124 | * This should remove some latency. | ||
1125 | */ | ||
1126 | device->queue_depth = 2; | ||
1127 | } | ||
1128 | } | ||
1129 | } | ||
1130 | } | ||
1131 | ahc_unlock(ahc, &flags); | ||
1132 | } | ||
1133 | #endif | ||
1134 | |||
1135 | #if defined(__i386__) | ||
1136 | /* | ||
1137 | * Return the disk geometry for the given SCSI device. | ||
1138 | */ | ||
1139 | static int | ||
1140 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
1141 | ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, | ||
1142 | sector_t capacity, int geom[]) | ||
1143 | { | ||
1144 | uint8_t *bh; | ||
1145 | #else | ||
1146 | ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[]) | ||
1147 | { | ||
1148 | struct scsi_device *sdev = disk->device; | ||
1149 | u_long capacity = disk->capacity; | ||
1150 | struct buffer_head *bh; | ||
1151 | #endif | ||
1152 | int heads; | ||
1153 | int sectors; | ||
1154 | int cylinders; | ||
1155 | int ret; | ||
1156 | int extended; | ||
1157 | struct ahc_softc *ahc; | ||
1158 | u_int channel; | ||
1159 | |||
1160 | ahc = *((struct ahc_softc **)sdev->host->hostdata); | ||
1161 | channel = sdev->channel; | ||
1162 | |||
1163 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
1164 | bh = scsi_bios_ptable(bdev); | ||
1165 | #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17) | ||
1166 | bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev)); | ||
1167 | #else | ||
1168 | bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024); | ||
1169 | #endif | ||
1170 | |||
1171 | if (bh) { | ||
1172 | ret = scsi_partsize(bh, capacity, | ||
1173 | &geom[2], &geom[0], &geom[1]); | ||
1174 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
1175 | kfree(bh); | ||
1176 | #else | ||
1177 | brelse(bh); | ||
1178 | #endif | ||
1179 | if (ret != -1) | ||
1180 | return (ret); | ||
1181 | } | ||
1182 | heads = 64; | ||
1183 | sectors = 32; | ||
1184 | cylinders = aic_sector_div(capacity, heads, sectors); | ||
1185 | |||
1186 | if (aic7xxx_extended != 0) | ||
1187 | extended = 1; | ||
1188 | else if (channel == 0) | ||
1189 | extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; | ||
1190 | else | ||
1191 | extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; | ||
1192 | if (extended && cylinders >= 1024) { | ||
1193 | heads = 255; | ||
1194 | sectors = 63; | ||
1195 | cylinders = aic_sector_div(capacity, heads, sectors); | ||
1196 | } | ||
1197 | geom[0] = heads; | ||
1198 | geom[1] = sectors; | ||
1199 | geom[2] = cylinders; | ||
1200 | return (0); | ||
1201 | } | ||
1202 | #endif | ||
1203 | |||
1204 | /* | ||
1205 | * Abort the current SCSI command(s). | ||
1206 | */ | ||
1207 | static int | ||
1208 | ahc_linux_abort(Scsi_Cmnd *cmd) | ||
1209 | { | ||
1210 | int error; | ||
1211 | |||
1212 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); | ||
1213 | if (error != 0) | ||
1214 | printf("aic7xxx_abort returns 0x%x\n", error); | ||
1215 | return (error); | ||
1216 | } | ||
1217 | |||
1218 | /* | ||
1219 | * Attempt to send a target reset message to the device that timed out. | ||
1220 | */ | ||
1221 | static int | ||
1222 | ahc_linux_dev_reset(Scsi_Cmnd *cmd) | ||
1223 | { | ||
1224 | int error; | ||
1225 | |||
1226 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); | ||
1227 | if (error != 0) | ||
1228 | printf("aic7xxx_dev_reset returns 0x%x\n", error); | ||
1229 | return (error); | ||
1230 | } | ||
1231 | |||
1232 | /* | ||
1233 | * Reset the SCSI bus. | ||
1234 | */ | ||
1235 | static int | ||
1236 | ahc_linux_bus_reset(Scsi_Cmnd *cmd) | ||
1237 | { | ||
1238 | struct ahc_softc *ahc; | ||
1239 | u_long s; | ||
1240 | int found; | ||
1241 | |||
1242 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | ||
1243 | ahc_midlayer_entrypoint_lock(ahc, &s); | ||
1244 | found = ahc_reset_channel(ahc, cmd->device->channel + 'A', | ||
1245 | /*initiate reset*/TRUE); | ||
1246 | ahc_linux_run_complete_queue(ahc); | ||
1247 | ahc_midlayer_entrypoint_unlock(ahc, &s); | ||
1248 | |||
1249 | if (bootverbose) | ||
1250 | printf("%s: SCSI bus reset delivered. " | ||
1251 | "%d SCBs aborted.\n", ahc_name(ahc), found); | ||
1252 | |||
1253 | return SUCCESS; | ||
1254 | } | ||
1255 | |||
1256 | Scsi_Host_Template aic7xxx_driver_template = { | ||
1257 | .module = THIS_MODULE, | ||
1258 | .name = "aic7xxx", | ||
1259 | .proc_info = ahc_linux_proc_info, | ||
1260 | .info = ahc_linux_info, | ||
1261 | .queuecommand = ahc_linux_queue, | ||
1262 | .eh_abort_handler = ahc_linux_abort, | ||
1263 | .eh_device_reset_handler = ahc_linux_dev_reset, | ||
1264 | .eh_bus_reset_handler = ahc_linux_bus_reset, | ||
1265 | #if defined(__i386__) | ||
1266 | .bios_param = ahc_linux_biosparam, | ||
1267 | #endif | ||
1268 | .can_queue = AHC_MAX_QUEUE, | ||
1269 | .this_id = -1, | ||
1270 | .cmd_per_lun = 2, | ||
1271 | .use_clustering = ENABLE_CLUSTERING, | ||
1272 | .slave_alloc = ahc_linux_slave_alloc, | ||
1273 | .slave_configure = ahc_linux_slave_configure, | ||
1274 | .slave_destroy = ahc_linux_slave_destroy, | ||
1275 | }; | ||
1276 | |||
1277 | /**************************** Tasklet Handler *********************************/ | ||
1278 | |||
1279 | /* | ||
1280 | * In 2.4.X and above, this routine is called from a tasklet, | ||
1281 | * so we must re-acquire our lock prior to executing this code. | ||
1282 | * In all prior kernels, ahc_schedule_runq() calls this routine | ||
1283 | * directly and ahc_schedule_runq() is called with our lock held. | ||
1284 | */ | ||
1285 | static void | ||
1286 | ahc_runq_tasklet(unsigned long data) | ||
1287 | { | ||
1288 | struct ahc_softc* ahc; | ||
1289 | struct ahc_linux_device *dev; | ||
1290 | u_long flags; | ||
1291 | |||
1292 | ahc = (struct ahc_softc *)data; | ||
1293 | ahc_lock(ahc, &flags); | ||
1294 | while ((dev = ahc_linux_next_device_to_run(ahc)) != NULL) { | ||
1295 | |||
1296 | TAILQ_REMOVE(&ahc->platform_data->device_runq, dev, links); | ||
1297 | dev->flags &= ~AHC_DEV_ON_RUN_LIST; | ||
1298 | ahc_linux_check_device_queue(ahc, dev); | ||
1299 | /* Yeild to our interrupt handler */ | ||
1300 | ahc_unlock(ahc, &flags); | ||
1301 | ahc_lock(ahc, &flags); | ||
1302 | } | ||
1303 | ahc_unlock(ahc, &flags); | ||
1304 | } | ||
1305 | |||
1306 | /******************************** Macros **************************************/ | ||
1307 | #define BUILD_SCSIID(ahc, cmd) \ | ||
1308 | ((((cmd)->device->id << TID_SHIFT) & TID) \ | ||
1309 | | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ | ||
1310 | | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) | ||
1311 | |||
1312 | /******************************** Bus DMA *************************************/ | ||
1313 | int | ||
1314 | ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, | ||
1315 | bus_size_t alignment, bus_size_t boundary, | ||
1316 | dma_addr_t lowaddr, dma_addr_t highaddr, | ||
1317 | bus_dma_filter_t *filter, void *filterarg, | ||
1318 | bus_size_t maxsize, int nsegments, | ||
1319 | bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) | ||
1320 | { | ||
1321 | bus_dma_tag_t dmat; | ||
1322 | |||
1323 | dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); | ||
1324 | if (dmat == NULL) | ||
1325 | return (ENOMEM); | ||
1326 | |||
1327 | /* | ||
1328 | * Linux is very simplistic about DMA memory. For now don't | ||
1329 | * maintain all specification information. Once Linux supplies | ||
1330 | * better facilities for doing these operations, or the | ||
1331 | * needs of this particular driver change, we might need to do | ||
1332 | * more here. | ||
1333 | */ | ||
1334 | dmat->alignment = alignment; | ||
1335 | dmat->boundary = boundary; | ||
1336 | dmat->maxsize = maxsize; | ||
1337 | *ret_tag = dmat; | ||
1338 | return (0); | ||
1339 | } | ||
1340 | |||
1341 | void | ||
1342 | ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) | ||
1343 | { | ||
1344 | free(dmat, M_DEVBUF); | ||
1345 | } | ||
1346 | |||
1347 | int | ||
1348 | ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, | ||
1349 | int flags, bus_dmamap_t *mapp) | ||
1350 | { | ||
1351 | bus_dmamap_t map; | ||
1352 | |||
1353 | map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT); | ||
1354 | if (map == NULL) | ||
1355 | return (ENOMEM); | ||
1356 | /* | ||
1357 | * Although we can dma data above 4GB, our | ||
1358 | * "consistent" memory is below 4GB for | ||
1359 | * space efficiency reasons (only need a 4byte | ||
1360 | * address). For this reason, we have to reset | ||
1361 | * our dma mask when doing allocations. | ||
1362 | */ | ||
1363 | if (ahc->dev_softc != NULL) | ||
1364 | if (pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF)) { | ||
1365 | printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n"); | ||
1366 | kfree(map); | ||
1367 | return (ENODEV); | ||
1368 | } | ||
1369 | *vaddr = pci_alloc_consistent(ahc->dev_softc, | ||
1370 | dmat->maxsize, &map->bus_addr); | ||
1371 | if (ahc->dev_softc != NULL) | ||
1372 | if (pci_set_dma_mask(ahc->dev_softc, | ||
1373 | ahc->platform_data->hw_dma_mask)) { | ||
1374 | printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n"); | ||
1375 | kfree(map); | ||
1376 | return (ENODEV); | ||
1377 | } | ||
1378 | if (*vaddr == NULL) | ||
1379 | return (ENOMEM); | ||
1380 | *mapp = map; | ||
1381 | return(0); | ||
1382 | } | ||
1383 | |||
1384 | void | ||
1385 | ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, | ||
1386 | void* vaddr, bus_dmamap_t map) | ||
1387 | { | ||
1388 | pci_free_consistent(ahc->dev_softc, dmat->maxsize, | ||
1389 | vaddr, map->bus_addr); | ||
1390 | } | ||
1391 | |||
1392 | int | ||
1393 | ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, | ||
1394 | void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, | ||
1395 | void *cb_arg, int flags) | ||
1396 | { | ||
1397 | /* | ||
1398 | * Assume for now that this will only be used during | ||
1399 | * initialization and not for per-transaction buffer mapping. | ||
1400 | */ | ||
1401 | bus_dma_segment_t stack_sg; | ||
1402 | |||
1403 | stack_sg.ds_addr = map->bus_addr; | ||
1404 | stack_sg.ds_len = dmat->maxsize; | ||
1405 | cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); | ||
1406 | return (0); | ||
1407 | } | ||
1408 | |||
1409 | void | ||
1410 | ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | ||
1411 | { | ||
1412 | /* | ||
1413 | * The map may is NULL in our < 2.3.X implementation. | ||
1414 | * Now it's 2.6.5, but just in case... | ||
1415 | */ | ||
1416 | BUG_ON(map == NULL); | ||
1417 | free(map, M_DEVBUF); | ||
1418 | } | ||
1419 | |||
1420 | int | ||
1421 | ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | ||
1422 | { | ||
1423 | /* Nothing to do */ | ||
1424 | return (0); | ||
1425 | } | ||
1426 | |||
1427 | /********************* Platform Dependent Functions ***************************/ | ||
1428 | /* | ||
1429 | * Compare "left hand" softc with "right hand" softc, returning: | ||
1430 | * < 0 - lahc has a lower priority than rahc | ||
1431 | * 0 - Softcs are equal | ||
1432 | * > 0 - lahc has a higher priority than rahc | ||
1433 | */ | ||
1434 | int | ||
1435 | ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc) | ||
1436 | { | ||
1437 | int value; | ||
1438 | int rvalue; | ||
1439 | int lvalue; | ||
1440 | |||
1441 | /* | ||
1442 | * Under Linux, cards are ordered as follows: | ||
1443 | * 1) VLB/EISA BIOS enabled devices sorted by BIOS address. | ||
1444 | * 2) PCI devices with BIOS enabled sorted by bus/slot/func. | ||
1445 | * 3) All remaining VLB/EISA devices sorted by ioport. | ||
1446 | * 4) All remaining PCI devices sorted by bus/slot/func. | ||
1447 | */ | ||
1448 | value = (lahc->flags & AHC_BIOS_ENABLED) | ||
1449 | - (rahc->flags & AHC_BIOS_ENABLED); | ||
1450 | if (value != 0) | ||
1451 | /* Controllers with BIOS enabled have a *higher* priority */ | ||
1452 | return (value); | ||
1453 | |||
1454 | /* | ||
1455 | * Same BIOS setting, now sort based on bus type. | ||
1456 | * EISA and VL controllers sort together. EISA/VL | ||
1457 | * have higher priority than PCI. | ||
1458 | */ | ||
1459 | rvalue = (rahc->chip & AHC_BUS_MASK); | ||
1460 | if (rvalue == AHC_VL) | ||
1461 | rvalue = AHC_EISA; | ||
1462 | lvalue = (lahc->chip & AHC_BUS_MASK); | ||
1463 | if (lvalue == AHC_VL) | ||
1464 | lvalue = AHC_EISA; | ||
1465 | value = rvalue - lvalue; | ||
1466 | if (value != 0) | ||
1467 | return (value); | ||
1468 | |||
1469 | /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */ | ||
1470 | switch (rvalue) { | ||
1471 | #ifdef CONFIG_PCI | ||
1472 | case AHC_PCI: | ||
1473 | { | ||
1474 | char primary_channel; | ||
1475 | |||
1476 | if (aic7xxx_reverse_scan != 0) | ||
1477 | value = ahc_get_pci_bus(lahc->dev_softc) | ||
1478 | - ahc_get_pci_bus(rahc->dev_softc); | ||
1479 | else | ||
1480 | value = ahc_get_pci_bus(rahc->dev_softc) | ||
1481 | - ahc_get_pci_bus(lahc->dev_softc); | ||
1482 | if (value != 0) | ||
1483 | break; | ||
1484 | if (aic7xxx_reverse_scan != 0) | ||
1485 | value = ahc_get_pci_slot(lahc->dev_softc) | ||
1486 | - ahc_get_pci_slot(rahc->dev_softc); | ||
1487 | else | ||
1488 | value = ahc_get_pci_slot(rahc->dev_softc) | ||
1489 | - ahc_get_pci_slot(lahc->dev_softc); | ||
1490 | if (value != 0) | ||
1491 | break; | ||
1492 | /* | ||
1493 | * On multi-function devices, the user can choose | ||
1494 | * to have function 1 probed before function 0. | ||
1495 | * Give whichever channel is the primary channel | ||
1496 | * the highest priority. | ||
1497 | */ | ||
1498 | primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A'; | ||
1499 | value = -1; | ||
1500 | if (lahc->channel == primary_channel) | ||
1501 | value = 1; | ||
1502 | break; | ||
1503 | } | ||
1504 | #endif | ||
1505 | case AHC_EISA: | ||
1506 | if ((rahc->flags & AHC_BIOS_ENABLED) != 0) { | ||
1507 | value = rahc->platform_data->bios_address | ||
1508 | - lahc->platform_data->bios_address; | ||
1509 | } else { | ||
1510 | value = rahc->bsh.ioport | ||
1511 | - lahc->bsh.ioport; | ||
1512 | } | ||
1513 | break; | ||
1514 | default: | ||
1515 | panic("ahc_softc_sort: invalid bus type"); | ||
1516 | } | ||
1517 | return (value); | ||
1518 | } | ||
1519 | |||
1520 | static void | ||
1521 | ahc_linux_setup_tag_info_global(char *p) | ||
1522 | { | ||
1523 | int tags, i, j; | ||
1524 | |||
1525 | tags = simple_strtoul(p + 1, NULL, 0) & 0xff; | ||
1526 | printf("Setting Global Tags= %d\n", tags); | ||
1527 | |||
1528 | for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) { | ||
1529 | for (j = 0; j < AHC_NUM_TARGETS; j++) { | ||
1530 | aic7xxx_tag_info[i].tag_commands[j] = tags; | ||
1531 | } | ||
1532 | } | ||
1533 | } | ||
1534 | |||
1535 | static void | ||
1536 | ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) | ||
1537 | { | ||
1538 | |||
1539 | if ((instance >= 0) && (targ >= 0) | ||
1540 | && (instance < NUM_ELEMENTS(aic7xxx_tag_info)) | ||
1541 | && (targ < AHC_NUM_TARGETS)) { | ||
1542 | aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; | ||
1543 | if (bootverbose) | ||
1544 | printf("tag_info[%d:%d] = %d\n", instance, targ, value); | ||
1545 | } | ||
1546 | } | ||
1547 | |||
1548 | static void | ||
1549 | ahc_linux_setup_dv(u_long arg, int instance, int targ, int32_t value) | ||
1550 | { | ||
1551 | |||
1552 | if ((instance >= 0) | ||
1553 | && (instance < NUM_ELEMENTS(aic7xxx_dv_settings))) { | ||
1554 | aic7xxx_dv_settings[instance] = value; | ||
1555 | if (bootverbose) | ||
1556 | printf("dv[%d] = %d\n", instance, value); | ||
1557 | } | ||
1558 | } | ||
1559 | |||
1560 | /* | ||
1561 | * Handle Linux boot parameters. This routine allows for assigning a value | ||
1562 | * to a parameter with a ':' between the parameter and the value. | ||
1563 | * ie. aic7xxx=stpwlev:1,extended | ||
1564 | */ | ||
1565 | static int | ||
1566 | aic7xxx_setup(char *s) | ||
1567 | { | ||
1568 | int i, n; | ||
1569 | char *p; | ||
1570 | char *end; | ||
1571 | |||
1572 | static struct { | ||
1573 | const char *name; | ||
1574 | uint32_t *flag; | ||
1575 | } options[] = { | ||
1576 | { "extended", &aic7xxx_extended }, | ||
1577 | { "no_reset", &aic7xxx_no_reset }, | ||
1578 | { "verbose", &aic7xxx_verbose }, | ||
1579 | { "allow_memio", &aic7xxx_allow_memio}, | ||
1580 | #ifdef AHC_DEBUG | ||
1581 | { "debug", &ahc_debug }, | ||
1582 | #endif | ||
1583 | { "reverse_scan", &aic7xxx_reverse_scan }, | ||
1584 | { "no_probe", &aic7xxx_probe_eisa_vl }, | ||
1585 | { "probe_eisa_vl", &aic7xxx_probe_eisa_vl }, | ||
1586 | { "periodic_otag", &aic7xxx_periodic_otag }, | ||
1587 | { "pci_parity", &aic7xxx_pci_parity }, | ||
1588 | { "seltime", &aic7xxx_seltime }, | ||
1589 | { "tag_info", NULL }, | ||
1590 | { "global_tag_depth", NULL }, | ||
1591 | { "dv", NULL } | ||
1592 | }; | ||
1593 | |||
1594 | end = strchr(s, '\0'); | ||
1595 | |||
1596 | /* | ||
1597 | * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS | ||
1598 | * will never be 0 in this case. | ||
1599 | */ | ||
1600 | n = 0; | ||
1601 | |||
1602 | while ((p = strsep(&s, ",.")) != NULL) { | ||
1603 | if (*p == '\0') | ||
1604 | continue; | ||
1605 | for (i = 0; i < NUM_ELEMENTS(options); i++) { | ||
1606 | |||
1607 | n = strlen(options[i].name); | ||
1608 | if (strncmp(options[i].name, p, n) == 0) | ||
1609 | break; | ||
1610 | } | ||
1611 | if (i == NUM_ELEMENTS(options)) | ||
1612 | continue; | ||
1613 | |||
1614 | if (strncmp(p, "global_tag_depth", n) == 0) { | ||
1615 | ahc_linux_setup_tag_info_global(p + n); | ||
1616 | } else if (strncmp(p, "tag_info", n) == 0) { | ||
1617 | s = aic_parse_brace_option("tag_info", p + n, end, | ||
1618 | 2, ahc_linux_setup_tag_info, 0); | ||
1619 | } else if (strncmp(p, "dv", n) == 0) { | ||
1620 | s = aic_parse_brace_option("dv", p + n, end, 1, | ||
1621 | ahc_linux_setup_dv, 0); | ||
1622 | } else if (p[n] == ':') { | ||
1623 | *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); | ||
1624 | } else if (strncmp(p, "verbose", n) == 0) { | ||
1625 | *(options[i].flag) = 1; | ||
1626 | } else { | ||
1627 | *(options[i].flag) ^= 0xFFFFFFFF; | ||
1628 | } | ||
1629 | } | ||
1630 | return 1; | ||
1631 | } | ||
1632 | |||
1633 | __setup("aic7xxx=", aic7xxx_setup); | ||
1634 | |||
1635 | uint32_t aic7xxx_verbose; | ||
1636 | |||
1637 | int | ||
1638 | ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template) | ||
1639 | { | ||
1640 | char buf[80]; | ||
1641 | struct Scsi_Host *host; | ||
1642 | char *new_name; | ||
1643 | u_long s; | ||
1644 | u_int targ_offset; | ||
1645 | |||
1646 | template->name = ahc->description; | ||
1647 | host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); | ||
1648 | if (host == NULL) | ||
1649 | return (ENOMEM); | ||
1650 | |||
1651 | *((struct ahc_softc **)host->hostdata) = ahc; | ||
1652 | ahc_lock(ahc, &s); | ||
1653 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
1654 | scsi_assign_lock(host, &ahc->platform_data->spin_lock); | ||
1655 | #elif AHC_SCSI_HAS_HOST_LOCK != 0 | ||
1656 | host->lock = &ahc->platform_data->spin_lock; | ||
1657 | #endif | ||
1658 | ahc->platform_data->host = host; | ||
1659 | host->can_queue = AHC_MAX_QUEUE; | ||
1660 | host->cmd_per_lun = 2; | ||
1661 | /* XXX No way to communicate the ID for multiple channels */ | ||
1662 | host->this_id = ahc->our_id; | ||
1663 | host->irq = ahc->platform_data->irq; | ||
1664 | host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; | ||
1665 | host->max_lun = AHC_NUM_LUNS; | ||
1666 | host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; | ||
1667 | host->sg_tablesize = AHC_NSEG; | ||
1668 | ahc_set_unit(ahc, ahc_linux_next_unit()); | ||
1669 | sprintf(buf, "scsi%d", host->host_no); | ||
1670 | new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); | ||
1671 | if (new_name != NULL) { | ||
1672 | strcpy(new_name, buf); | ||
1673 | ahc_set_name(ahc, new_name); | ||
1674 | } | ||
1675 | host->unique_id = ahc->unit; | ||
1676 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | ||
1677 | scsi_set_pci_device(host, ahc->dev_softc); | ||
1678 | #endif | ||
1679 | ahc_linux_initialize_scsi_bus(ahc); | ||
1680 | ahc_unlock(ahc, &s); | ||
1681 | ahc->platform_data->dv_pid = kernel_thread(ahc_linux_dv_thread, ahc, 0); | ||
1682 | ahc_lock(ahc, &s); | ||
1683 | if (ahc->platform_data->dv_pid < 0) { | ||
1684 | printf("%s: Failed to create DV thread, error= %d\n", | ||
1685 | ahc_name(ahc), ahc->platform_data->dv_pid); | ||
1686 | return (-ahc->platform_data->dv_pid); | ||
1687 | } | ||
1688 | /* | ||
1689 | * Initially allocate *all* of our linux target objects | ||
1690 | * so that the DV thread will scan them all in parallel | ||
1691 | * just after driver initialization. Any device that | ||
1692 | * does not exist will have its target object destroyed | ||
1693 | * by the selection timeout handler. In the case of a | ||
1694 | * device that appears after the initial DV scan, async | ||
1695 | * negotiation will occur for the first command, and DV | ||
1696 | * will comence should that first command be successful. | ||
1697 | */ | ||
1698 | for (targ_offset = 0; | ||
1699 | targ_offset < host->max_id * (host->max_channel + 1); | ||
1700 | targ_offset++) { | ||
1701 | u_int channel; | ||
1702 | u_int target; | ||
1703 | |||
1704 | channel = 0; | ||
1705 | target = targ_offset; | ||
1706 | if (target > 7 | ||
1707 | && (ahc->features & AHC_TWIN) != 0) { | ||
1708 | channel = 1; | ||
1709 | target &= 0x7; | ||
1710 | } | ||
1711 | /* | ||
1712 | * Skip our own ID. Some Compaq/HP storage devices | ||
1713 | * have enclosure management devices that respond to | ||
1714 | * single bit selection (i.e. selecting ourselves). | ||
1715 | * It is expected that either an external application | ||
1716 | * or a modified kernel will be used to probe this | ||
1717 | * ID if it is appropriate. To accommodate these | ||
1718 | * installations, ahc_linux_alloc_target() will allocate | ||
1719 | * for our ID if asked to do so. | ||
1720 | */ | ||
1721 | if ((channel == 0 && target == ahc->our_id) | ||
1722 | || (channel == 1 && target == ahc->our_id_b)) | ||
1723 | continue; | ||
1724 | |||
1725 | ahc_linux_alloc_target(ahc, channel, target); | ||
1726 | } | ||
1727 | ahc_intr_enable(ahc, TRUE); | ||
1728 | ahc_linux_start_dv(ahc); | ||
1729 | ahc_unlock(ahc, &s); | ||
1730 | |||
1731 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
1732 | scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */ | ||
1733 | scsi_scan_host(host); | ||
1734 | #endif | ||
1735 | return (0); | ||
1736 | } | ||
1737 | |||
1738 | uint64_t | ||
1739 | ahc_linux_get_memsize(void) | ||
1740 | { | ||
1741 | struct sysinfo si; | ||
1742 | |||
1743 | si_meminfo(&si); | ||
1744 | return ((uint64_t)si.totalram << PAGE_SHIFT); | ||
1745 | } | ||
1746 | |||
1747 | /* | ||
1748 | * Find the smallest available unit number to use | ||
1749 | * for a new device. We don't just use a static | ||
1750 | * count to handle the "repeated hot-(un)plug" | ||
1751 | * scenario. | ||
1752 | */ | ||
1753 | static int | ||
1754 | ahc_linux_next_unit(void) | ||
1755 | { | ||
1756 | struct ahc_softc *ahc; | ||
1757 | int unit; | ||
1758 | |||
1759 | unit = 0; | ||
1760 | retry: | ||
1761 | TAILQ_FOREACH(ahc, &ahc_tailq, links) { | ||
1762 | if (ahc->unit == unit) { | ||
1763 | unit++; | ||
1764 | goto retry; | ||
1765 | } | ||
1766 | } | ||
1767 | return (unit); | ||
1768 | } | ||
1769 | |||
1770 | /* | ||
1771 | * Place the SCSI bus into a known state by either resetting it, | ||
1772 | * or forcing transfer negotiations on the next command to any | ||
1773 | * target. | ||
1774 | */ | ||
1775 | void | ||
1776 | ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) | ||
1777 | { | ||
1778 | int i; | ||
1779 | int numtarg; | ||
1780 | |||
1781 | i = 0; | ||
1782 | numtarg = 0; | ||
1783 | |||
1784 | if (aic7xxx_no_reset != 0) | ||
1785 | ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); | ||
1786 | |||
1787 | if ((ahc->flags & AHC_RESET_BUS_A) != 0) | ||
1788 | ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); | ||
1789 | else | ||
1790 | numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; | ||
1791 | |||
1792 | if ((ahc->features & AHC_TWIN) != 0) { | ||
1793 | |||
1794 | if ((ahc->flags & AHC_RESET_BUS_B) != 0) { | ||
1795 | ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); | ||
1796 | } else { | ||
1797 | if (numtarg == 0) | ||
1798 | i = 8; | ||
1799 | numtarg += 8; | ||
1800 | } | ||
1801 | } | ||
1802 | |||
1803 | /* | ||
1804 | * Force negotiation to async for all targets that | ||
1805 | * will not see an initial bus reset. | ||
1806 | */ | ||
1807 | for (; i < numtarg; i++) { | ||
1808 | struct ahc_devinfo devinfo; | ||
1809 | struct ahc_initiator_tinfo *tinfo; | ||
1810 | struct ahc_tmode_tstate *tstate; | ||
1811 | u_int our_id; | ||
1812 | u_int target_id; | ||
1813 | char channel; | ||
1814 | |||
1815 | channel = 'A'; | ||
1816 | our_id = ahc->our_id; | ||
1817 | target_id = i; | ||
1818 | if (i > 7 && (ahc->features & AHC_TWIN) != 0) { | ||
1819 | channel = 'B'; | ||
1820 | our_id = ahc->our_id_b; | ||
1821 | target_id = i % 8; | ||
1822 | } | ||
1823 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, | ||
1824 | target_id, &tstate); | ||
1825 | ahc_compile_devinfo(&devinfo, our_id, target_id, | ||
1826 | CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); | ||
1827 | ahc_update_neg_request(ahc, &devinfo, tstate, | ||
1828 | tinfo, AHC_NEG_ALWAYS); | ||
1829 | } | ||
1830 | /* Give the bus some time to recover */ | ||
1831 | if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { | ||
1832 | ahc_linux_freeze_simq(ahc); | ||
1833 | init_timer(&ahc->platform_data->reset_timer); | ||
1834 | ahc->platform_data->reset_timer.data = (u_long)ahc; | ||
1835 | ahc->platform_data->reset_timer.expires = | ||
1836 | jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000; | ||
1837 | ahc->platform_data->reset_timer.function = | ||
1838 | ahc_linux_release_simq; | ||
1839 | add_timer(&ahc->platform_data->reset_timer); | ||
1840 | } | ||
1841 | } | ||
1842 | |||
1843 | int | ||
1844 | ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) | ||
1845 | { | ||
1846 | |||
1847 | ahc->platform_data = | ||
1848 | malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); | ||
1849 | if (ahc->platform_data == NULL) | ||
1850 | return (ENOMEM); | ||
1851 | memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); | ||
1852 | TAILQ_INIT(&ahc->platform_data->completeq); | ||
1853 | TAILQ_INIT(&ahc->platform_data->device_runq); | ||
1854 | ahc->platform_data->irq = AHC_LINUX_NOIRQ; | ||
1855 | ahc->platform_data->hw_dma_mask = 0xFFFFFFFF; | ||
1856 | ahc_lockinit(ahc); | ||
1857 | ahc_done_lockinit(ahc); | ||
1858 | init_timer(&ahc->platform_data->completeq_timer); | ||
1859 | ahc->platform_data->completeq_timer.data = (u_long)ahc; | ||
1860 | ahc->platform_data->completeq_timer.function = | ||
1861 | (ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue; | ||
1862 | init_MUTEX_LOCKED(&ahc->platform_data->eh_sem); | ||
1863 | init_MUTEX_LOCKED(&ahc->platform_data->dv_sem); | ||
1864 | init_MUTEX_LOCKED(&ahc->platform_data->dv_cmd_sem); | ||
1865 | tasklet_init(&ahc->platform_data->runq_tasklet, ahc_runq_tasklet, | ||
1866 | (unsigned long)ahc); | ||
1867 | ahc->seltime = (aic7xxx_seltime & 0x3) << 4; | ||
1868 | ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; | ||
1869 | if (aic7xxx_pci_parity == 0) | ||
1870 | ahc->flags |= AHC_DISABLE_PCI_PERR; | ||
1871 | |||
1872 | return (0); | ||
1873 | } | ||
1874 | |||
1875 | void | ||
1876 | ahc_platform_free(struct ahc_softc *ahc) | ||
1877 | { | ||
1878 | struct ahc_linux_target *targ; | ||
1879 | struct ahc_linux_device *dev; | ||
1880 | int i, j; | ||
1881 | |||
1882 | if (ahc->platform_data != NULL) { | ||
1883 | del_timer_sync(&ahc->platform_data->completeq_timer); | ||
1884 | ahc_linux_kill_dv_thread(ahc); | ||
1885 | tasklet_kill(&ahc->platform_data->runq_tasklet); | ||
1886 | if (ahc->platform_data->host != NULL) { | ||
1887 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
1888 | scsi_remove_host(ahc->platform_data->host); | ||
1889 | #endif | ||
1890 | scsi_host_put(ahc->platform_data->host); | ||
1891 | } | ||
1892 | |||
1893 | /* destroy all of the device and target objects */ | ||
1894 | for (i = 0; i < AHC_NUM_TARGETS; i++) { | ||
1895 | targ = ahc->platform_data->targets[i]; | ||
1896 | if (targ != NULL) { | ||
1897 | /* Keep target around through the loop. */ | ||
1898 | targ->refcount++; | ||
1899 | for (j = 0; j < AHC_NUM_LUNS; j++) { | ||
1900 | |||
1901 | if (targ->devices[j] == NULL) | ||
1902 | continue; | ||
1903 | dev = targ->devices[j]; | ||
1904 | ahc_linux_free_device(ahc, dev); | ||
1905 | } | ||
1906 | /* | ||
1907 | * Forcibly free the target now that | ||
1908 | * all devices are gone. | ||
1909 | */ | ||
1910 | ahc_linux_free_target(ahc, targ); | ||
1911 | } | ||
1912 | } | ||
1913 | |||
1914 | if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) | ||
1915 | free_irq(ahc->platform_data->irq, ahc); | ||
1916 | if (ahc->tag == BUS_SPACE_PIO | ||
1917 | && ahc->bsh.ioport != 0) | ||
1918 | release_region(ahc->bsh.ioport, 256); | ||
1919 | if (ahc->tag == BUS_SPACE_MEMIO | ||
1920 | && ahc->bsh.maddr != NULL) { | ||
1921 | iounmap(ahc->bsh.maddr); | ||
1922 | release_mem_region(ahc->platform_data->mem_busaddr, | ||
1923 | 0x1000); | ||
1924 | } | ||
1925 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | ||
1926 | /* | ||
1927 | * In 2.4 we detach from the scsi midlayer before the PCI | ||
1928 | * layer invokes our remove callback. No per-instance | ||
1929 | * detach is provided, so we must reach inside the PCI | ||
1930 | * subsystem's internals and detach our driver manually. | ||
1931 | */ | ||
1932 | if (ahc->dev_softc != NULL) | ||
1933 | ahc->dev_softc->driver = NULL; | ||
1934 | #endif | ||
1935 | free(ahc->platform_data, M_DEVBUF); | ||
1936 | } | ||
1937 | } | ||
1938 | |||
1939 | void | ||
1940 | ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) | ||
1941 | { | ||
1942 | ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), | ||
1943 | SCB_GET_CHANNEL(ahc, scb), | ||
1944 | SCB_GET_LUN(scb), SCB_LIST_NULL, | ||
1945 | ROLE_UNKNOWN, CAM_REQUEUE_REQ); | ||
1946 | } | ||
1947 | |||
1948 | void | ||
1949 | ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, | ||
1950 | ahc_queue_alg alg) | ||
1951 | { | ||
1952 | struct ahc_linux_device *dev; | ||
1953 | int was_queuing; | ||
1954 | int now_queuing; | ||
1955 | |||
1956 | dev = ahc_linux_get_device(ahc, devinfo->channel - 'A', | ||
1957 | devinfo->target, | ||
1958 | devinfo->lun, /*alloc*/FALSE); | ||
1959 | if (dev == NULL) | ||
1960 | return; | ||
1961 | was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); | ||
1962 | switch (alg) { | ||
1963 | default: | ||
1964 | case AHC_QUEUE_NONE: | ||
1965 | now_queuing = 0; | ||
1966 | break; | ||
1967 | case AHC_QUEUE_BASIC: | ||
1968 | now_queuing = AHC_DEV_Q_BASIC; | ||
1969 | break; | ||
1970 | case AHC_QUEUE_TAGGED: | ||
1971 | now_queuing = AHC_DEV_Q_TAGGED; | ||
1972 | break; | ||
1973 | } | ||
1974 | if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 | ||
1975 | && (was_queuing != now_queuing) | ||
1976 | && (dev->active != 0)) { | ||
1977 | dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; | ||
1978 | dev->qfrozen++; | ||
1979 | } | ||
1980 | |||
1981 | dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); | ||
1982 | if (now_queuing) { | ||
1983 | u_int usertags; | ||
1984 | |||
1985 | usertags = ahc_linux_user_tagdepth(ahc, devinfo); | ||
1986 | if (!was_queuing) { | ||
1987 | /* | ||
1988 | * Start out agressively and allow our | ||
1989 | * dynamic queue depth algorithm to take | ||
1990 | * care of the rest. | ||
1991 | */ | ||
1992 | dev->maxtags = usertags; | ||
1993 | dev->openings = dev->maxtags - dev->active; | ||
1994 | } | ||
1995 | if (dev->maxtags == 0) { | ||
1996 | /* | ||
1997 | * Queueing is disabled by the user. | ||
1998 | */ | ||
1999 | dev->openings = 1; | ||
2000 | } else if (alg == AHC_QUEUE_TAGGED) { | ||
2001 | dev->flags |= AHC_DEV_Q_TAGGED; | ||
2002 | if (aic7xxx_periodic_otag != 0) | ||
2003 | dev->flags |= AHC_DEV_PERIODIC_OTAG; | ||
2004 | } else | ||
2005 | dev->flags |= AHC_DEV_Q_BASIC; | ||
2006 | } else { | ||
2007 | /* We can only have one opening. */ | ||
2008 | dev->maxtags = 0; | ||
2009 | dev->openings = 1 - dev->active; | ||
2010 | } | ||
2011 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
2012 | if (dev->scsi_device != NULL) { | ||
2013 | switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { | ||
2014 | case AHC_DEV_Q_BASIC: | ||
2015 | scsi_adjust_queue_depth(dev->scsi_device, | ||
2016 | MSG_SIMPLE_TASK, | ||
2017 | dev->openings + dev->active); | ||
2018 | break; | ||
2019 | case AHC_DEV_Q_TAGGED: | ||
2020 | scsi_adjust_queue_depth(dev->scsi_device, | ||
2021 | MSG_ORDERED_TASK, | ||
2022 | dev->openings + dev->active); | ||
2023 | break; | ||
2024 | default: | ||
2025 | /* | ||
2026 | * We allow the OS to queue 2 untagged transactions to | ||
2027 | * us at any time even though we can only execute them | ||
2028 | * serially on the controller/device. This should | ||
2029 | * remove some latency. | ||
2030 | */ | ||
2031 | scsi_adjust_queue_depth(dev->scsi_device, | ||
2032 | /*NON-TAGGED*/0, | ||
2033 | /*queue depth*/2); | ||
2034 | break; | ||
2035 | } | ||
2036 | } | ||
2037 | #endif | ||
2038 | } | ||
2039 | |||
2040 | int | ||
2041 | ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, | ||
2042 | int lun, u_int tag, role_t role, uint32_t status) | ||
2043 | { | ||
2044 | int chan; | ||
2045 | int maxchan; | ||
2046 | int targ; | ||
2047 | int maxtarg; | ||
2048 | int clun; | ||
2049 | int maxlun; | ||
2050 | int count; | ||
2051 | |||
2052 | if (tag != SCB_LIST_NULL) | ||
2053 | return (0); | ||
2054 | |||
2055 | chan = 0; | ||
2056 | if (channel != ALL_CHANNELS) { | ||
2057 | chan = channel - 'A'; | ||
2058 | maxchan = chan + 1; | ||
2059 | } else { | ||
2060 | maxchan = (ahc->features & AHC_TWIN) ? 2 : 1; | ||
2061 | } | ||
2062 | targ = 0; | ||
2063 | if (target != CAM_TARGET_WILDCARD) { | ||
2064 | targ = target; | ||
2065 | maxtarg = targ + 1; | ||
2066 | } else { | ||
2067 | maxtarg = (ahc->features & AHC_WIDE) ? 16 : 8; | ||
2068 | } | ||
2069 | clun = 0; | ||
2070 | if (lun != CAM_LUN_WILDCARD) { | ||
2071 | clun = lun; | ||
2072 | maxlun = clun + 1; | ||
2073 | } else { | ||
2074 | maxlun = AHC_NUM_LUNS; | ||
2075 | } | ||
2076 | |||
2077 | count = 0; | ||
2078 | for (; chan < maxchan; chan++) { | ||
2079 | |||
2080 | for (; targ < maxtarg; targ++) { | ||
2081 | |||
2082 | for (; clun < maxlun; clun++) { | ||
2083 | struct ahc_linux_device *dev; | ||
2084 | struct ahc_busyq *busyq; | ||
2085 | struct ahc_cmd *acmd; | ||
2086 | |||
2087 | dev = ahc_linux_get_device(ahc, chan, | ||
2088 | targ, clun, | ||
2089 | /*alloc*/FALSE); | ||
2090 | if (dev == NULL) | ||
2091 | continue; | ||
2092 | |||
2093 | busyq = &dev->busyq; | ||
2094 | while ((acmd = TAILQ_FIRST(busyq)) != NULL) { | ||
2095 | Scsi_Cmnd *cmd; | ||
2096 | |||
2097 | cmd = &acmd_scsi_cmd(acmd); | ||
2098 | TAILQ_REMOVE(busyq, acmd, | ||
2099 | acmd_links.tqe); | ||
2100 | count++; | ||
2101 | cmd->result = status << 16; | ||
2102 | ahc_linux_queue_cmd_complete(ahc, cmd); | ||
2103 | } | ||
2104 | } | ||
2105 | } | ||
2106 | } | ||
2107 | |||
2108 | return (count); | ||
2109 | } | ||
2110 | |||
2111 | static void | ||
2112 | ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc) | ||
2113 | { | ||
2114 | u_long flags; | ||
2115 | |||
2116 | ahc_lock(ahc, &flags); | ||
2117 | del_timer(&ahc->platform_data->completeq_timer); | ||
2118 | ahc->platform_data->flags &= ~AHC_RUN_CMPLT_Q_TIMER; | ||
2119 | ahc_linux_run_complete_queue(ahc); | ||
2120 | ahc_unlock(ahc, &flags); | ||
2121 | } | ||
2122 | |||
2123 | static void | ||
2124 | ahc_linux_start_dv(struct ahc_softc *ahc) | ||
2125 | { | ||
2126 | |||
2127 | /* | ||
2128 | * Freeze the simq and signal ahc_linux_queue to not let any | ||
2129 | * more commands through. | ||
2130 | */ | ||
2131 | if ((ahc->platform_data->flags & AHC_DV_ACTIVE) == 0) { | ||
2132 | #ifdef AHC_DEBUG | ||
2133 | if (ahc_debug & AHC_SHOW_DV) | ||
2134 | printf("%s: Waking DV thread\n", ahc_name(ahc)); | ||
2135 | #endif | ||
2136 | |||
2137 | ahc->platform_data->flags |= AHC_DV_ACTIVE; | ||
2138 | ahc_linux_freeze_simq(ahc); | ||
2139 | |||
2140 | /* Wake up the DV kthread */ | ||
2141 | up(&ahc->platform_data->dv_sem); | ||
2142 | } | ||
2143 | } | ||
2144 | |||
2145 | static void | ||
2146 | ahc_linux_kill_dv_thread(struct ahc_softc *ahc) | ||
2147 | { | ||
2148 | u_long s; | ||
2149 | |||
2150 | ahc_lock(ahc, &s); | ||
2151 | if (ahc->platform_data->dv_pid != 0) { | ||
2152 | ahc->platform_data->flags |= AHC_DV_SHUTDOWN; | ||
2153 | ahc_unlock(ahc, &s); | ||
2154 | up(&ahc->platform_data->dv_sem); | ||
2155 | |||
2156 | /* | ||
2157 | * Use the eh_sem as an indicator that the | ||
2158 | * dv thread is exiting. Note that the dv | ||
2159 | * thread must still return after performing | ||
2160 | * the up on our semaphore before it has | ||
2161 | * completely exited this module. Unfortunately, | ||
2162 | * there seems to be no easy way to wait for the | ||
2163 | * exit of a thread for which you are not the | ||
2164 | * parent (dv threads are parented by init). | ||
2165 | * Cross your fingers... | ||
2166 | */ | ||
2167 | down(&ahc->platform_data->eh_sem); | ||
2168 | |||
2169 | /* | ||
2170 | * Mark the dv thread as already dead. This | ||
2171 | * avoids attempting to kill it a second time. | ||
2172 | * This is necessary because we must kill the | ||
2173 | * DV thread before calling ahc_free() in the | ||
2174 | * module shutdown case to avoid bogus locking | ||
2175 | * in the SCSI mid-layer, but we ahc_free() is | ||
2176 | * called without killing the DV thread in the | ||
2177 | * instance detach case, so ahc_platform_free() | ||
2178 | * calls us again to verify that the DV thread | ||
2179 | * is dead. | ||
2180 | */ | ||
2181 | ahc->platform_data->dv_pid = 0; | ||
2182 | } else { | ||
2183 | ahc_unlock(ahc, &s); | ||
2184 | } | ||
2185 | } | ||
2186 | |||
2187 | static int | ||
2188 | ahc_linux_dv_thread(void *data) | ||
2189 | { | ||
2190 | struct ahc_softc *ahc; | ||
2191 | int target; | ||
2192 | u_long s; | ||
2193 | |||
2194 | ahc = (struct ahc_softc *)data; | ||
2195 | |||
2196 | #ifdef AHC_DEBUG | ||
2197 | if (ahc_debug & AHC_SHOW_DV) | ||
2198 | printf("Launching DV Thread\n"); | ||
2199 | #endif | ||
2200 | |||
2201 | /* | ||
2202 | * Complete thread creation. | ||
2203 | */ | ||
2204 | lock_kernel(); | ||
2205 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | ||
2206 | /* | ||
2207 | * Don't care about any signals. | ||
2208 | */ | ||
2209 | siginitsetinv(¤t->blocked, 0); | ||
2210 | |||
2211 | daemonize(); | ||
2212 | sprintf(current->comm, "ahc_dv_%d", ahc->unit); | ||
2213 | #else | ||
2214 | daemonize("ahc_dv_%d", ahc->unit); | ||
2215 | current->flags |= PF_FREEZE; | ||
2216 | #endif | ||
2217 | unlock_kernel(); | ||
2218 | |||
2219 | while (1) { | ||
2220 | /* | ||
2221 | * Use down_interruptible() rather than down() to | ||
2222 | * avoid inclusion in the load average. | ||
2223 | */ | ||
2224 | down_interruptible(&ahc->platform_data->dv_sem); | ||
2225 | |||
2226 | /* Check to see if we've been signaled to exit */ | ||
2227 | ahc_lock(ahc, &s); | ||
2228 | if ((ahc->platform_data->flags & AHC_DV_SHUTDOWN) != 0) { | ||
2229 | ahc_unlock(ahc, &s); | ||
2230 | break; | ||
2231 | } | ||
2232 | ahc_unlock(ahc, &s); | ||
2233 | |||
2234 | #ifdef AHC_DEBUG | ||
2235 | if (ahc_debug & AHC_SHOW_DV) | ||
2236 | printf("%s: Beginning Domain Validation\n", | ||
2237 | ahc_name(ahc)); | ||
2238 | #endif | ||
2239 | |||
2240 | /* | ||
2241 | * Wait for any pending commands to drain before proceeding. | ||
2242 | */ | ||
2243 | ahc_lock(ahc, &s); | ||
2244 | while (LIST_FIRST(&ahc->pending_scbs) != NULL) { | ||
2245 | ahc->platform_data->flags |= AHC_DV_WAIT_SIMQ_EMPTY; | ||
2246 | ahc_unlock(ahc, &s); | ||
2247 | down_interruptible(&ahc->platform_data->dv_sem); | ||
2248 | ahc_lock(ahc, &s); | ||
2249 | } | ||
2250 | |||
2251 | /* | ||
2252 | * Wait for the SIMQ to be released so that DV is the | ||
2253 | * only reason the queue is frozen. | ||
2254 | */ | ||
2255 | while (AHC_DV_SIMQ_FROZEN(ahc) == 0) { | ||
2256 | ahc->platform_data->flags |= AHC_DV_WAIT_SIMQ_RELEASE; | ||
2257 | ahc_unlock(ahc, &s); | ||
2258 | down_interruptible(&ahc->platform_data->dv_sem); | ||
2259 | ahc_lock(ahc, &s); | ||
2260 | } | ||
2261 | ahc_unlock(ahc, &s); | ||
2262 | |||
2263 | for (target = 0; target < AHC_NUM_TARGETS; target++) | ||
2264 | ahc_linux_dv_target(ahc, target); | ||
2265 | |||
2266 | ahc_lock(ahc, &s); | ||
2267 | ahc->platform_data->flags &= ~AHC_DV_ACTIVE; | ||
2268 | ahc_unlock(ahc, &s); | ||
2269 | |||
2270 | /* | ||
2271 | * Release the SIMQ so that normal commands are | ||
2272 | * allowed to continue on the bus. | ||
2273 | */ | ||
2274 | ahc_linux_release_simq((u_long)ahc); | ||
2275 | } | ||
2276 | up(&ahc->platform_data->eh_sem); | ||
2277 | return (0); | ||
2278 | } | ||
2279 | |||
2280 | #define AHC_LINUX_DV_INQ_SHORT_LEN 36 | ||
2281 | #define AHC_LINUX_DV_INQ_LEN 256 | ||
2282 | #define AHC_LINUX_DV_TIMEOUT (HZ / 4) | ||
2283 | |||
2284 | #define AHC_SET_DV_STATE(ahc, targ, newstate) \ | ||
2285 | ahc_set_dv_state(ahc, targ, newstate, __LINE__) | ||
2286 | |||
2287 | static __inline void | ||
2288 | ahc_set_dv_state(struct ahc_softc *ahc, struct ahc_linux_target *targ, | ||
2289 | ahc_dv_state newstate, u_int line) | ||
2290 | { | ||
2291 | ahc_dv_state oldstate; | ||
2292 | |||
2293 | oldstate = targ->dv_state; | ||
2294 | #ifdef AHC_DEBUG | ||
2295 | if (ahc_debug & AHC_SHOW_DV) | ||
2296 | printf("%s:%d: Going from state %d to state %d\n", | ||
2297 | ahc_name(ahc), line, oldstate, newstate); | ||
2298 | #endif | ||
2299 | |||
2300 | if (oldstate == newstate) | ||
2301 | targ->dv_state_retry++; | ||
2302 | else | ||
2303 | targ->dv_state_retry = 0; | ||
2304 | targ->dv_state = newstate; | ||
2305 | } | ||
2306 | |||
2307 | static void | ||
2308 | ahc_linux_dv_target(struct ahc_softc *ahc, u_int target_offset) | ||
2309 | { | ||
2310 | struct ahc_devinfo devinfo; | ||
2311 | struct ahc_linux_target *targ; | ||
2312 | struct scsi_cmnd *cmd; | ||
2313 | struct scsi_device *scsi_dev; | ||
2314 | struct scsi_sense_data *sense; | ||
2315 | uint8_t *buffer; | ||
2316 | u_long s; | ||
2317 | u_int timeout; | ||
2318 | int echo_size; | ||
2319 | |||
2320 | sense = NULL; | ||
2321 | buffer = NULL; | ||
2322 | echo_size = 0; | ||
2323 | ahc_lock(ahc, &s); | ||
2324 | targ = ahc->platform_data->targets[target_offset]; | ||
2325 | if (targ == NULL || (targ->flags & AHC_DV_REQUIRED) == 0) { | ||
2326 | ahc_unlock(ahc, &s); | ||
2327 | return; | ||
2328 | } | ||
2329 | ahc_compile_devinfo(&devinfo, | ||
2330 | targ->channel == 0 ? ahc->our_id : ahc->our_id_b, | ||
2331 | targ->target, /*lun*/0, targ->channel + 'A', | ||
2332 | ROLE_INITIATOR); | ||
2333 | #ifdef AHC_DEBUG | ||
2334 | if (ahc_debug & AHC_SHOW_DV) { | ||
2335 | ahc_print_devinfo(ahc, &devinfo); | ||
2336 | printf("Performing DV\n"); | ||
2337 | } | ||
2338 | #endif | ||
2339 | |||
2340 | ahc_unlock(ahc, &s); | ||
2341 | |||
2342 | cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK); | ||
2343 | scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK); | ||
2344 | scsi_dev->host = ahc->platform_data->host; | ||
2345 | scsi_dev->id = devinfo.target; | ||
2346 | scsi_dev->lun = devinfo.lun; | ||
2347 | scsi_dev->channel = devinfo.channel - 'A'; | ||
2348 | ahc->platform_data->dv_scsi_dev = scsi_dev; | ||
2349 | |||
2350 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_INQ_SHORT_ASYNC); | ||
2351 | |||
2352 | while (targ->dv_state != AHC_DV_STATE_EXIT) { | ||
2353 | timeout = AHC_LINUX_DV_TIMEOUT; | ||
2354 | switch (targ->dv_state) { | ||
2355 | case AHC_DV_STATE_INQ_SHORT_ASYNC: | ||
2356 | case AHC_DV_STATE_INQ_ASYNC: | ||
2357 | case AHC_DV_STATE_INQ_ASYNC_VERIFY: | ||
2358 | /* | ||
2359 | * Set things to async narrow to reduce the | ||
2360 | * chance that the INQ will fail. | ||
2361 | */ | ||
2362 | ahc_lock(ahc, &s); | ||
2363 | ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, | ||
2364 | AHC_TRANS_GOAL, /*paused*/FALSE); | ||
2365 | ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, | ||
2366 | AHC_TRANS_GOAL, /*paused*/FALSE); | ||
2367 | ahc_unlock(ahc, &s); | ||
2368 | timeout = 10 * HZ; | ||
2369 | targ->flags &= ~AHC_INQ_VALID; | ||
2370 | /* FALLTHROUGH */ | ||
2371 | case AHC_DV_STATE_INQ_VERIFY: | ||
2372 | { | ||
2373 | u_int inq_len; | ||
2374 | |||
2375 | if (targ->dv_state == AHC_DV_STATE_INQ_SHORT_ASYNC) | ||
2376 | inq_len = AHC_LINUX_DV_INQ_SHORT_LEN; | ||
2377 | else | ||
2378 | inq_len = targ->inq_data->additional_length + 5; | ||
2379 | ahc_linux_dv_inq(ahc, cmd, &devinfo, targ, inq_len); | ||
2380 | break; | ||
2381 | } | ||
2382 | case AHC_DV_STATE_TUR: | ||
2383 | case AHC_DV_STATE_BUSY: | ||
2384 | timeout = 5 * HZ; | ||
2385 | ahc_linux_dv_tur(ahc, cmd, &devinfo); | ||
2386 | break; | ||
2387 | case AHC_DV_STATE_REBD: | ||
2388 | ahc_linux_dv_rebd(ahc, cmd, &devinfo, targ); | ||
2389 | break; | ||
2390 | case AHC_DV_STATE_WEB: | ||
2391 | ahc_linux_dv_web(ahc, cmd, &devinfo, targ); | ||
2392 | break; | ||
2393 | |||
2394 | case AHC_DV_STATE_REB: | ||
2395 | ahc_linux_dv_reb(ahc, cmd, &devinfo, targ); | ||
2396 | break; | ||
2397 | |||
2398 | case AHC_DV_STATE_SU: | ||
2399 | ahc_linux_dv_su(ahc, cmd, &devinfo, targ); | ||
2400 | timeout = 50 * HZ; | ||
2401 | break; | ||
2402 | |||
2403 | default: | ||
2404 | ahc_print_devinfo(ahc, &devinfo); | ||
2405 | printf("Unknown DV state %d\n", targ->dv_state); | ||
2406 | goto out; | ||
2407 | } | ||
2408 | |||
2409 | /* Queue the command and wait for it to complete */ | ||
2410 | /* Abuse eh_timeout in the scsi_cmnd struct for our purposes */ | ||
2411 | init_timer(&cmd->eh_timeout); | ||
2412 | #ifdef AHC_DEBUG | ||
2413 | if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) | ||
2414 | /* | ||
2415 | * All of the printfs during negotiation | ||
2416 | * really slow down the negotiation. | ||
2417 | * Add a bit of time just to be safe. | ||
2418 | */ | ||
2419 | timeout += HZ; | ||
2420 | #endif | ||
2421 | scsi_add_timer(cmd, timeout, ahc_linux_dv_timeout); | ||
2422 | /* | ||
2423 | * In 2.5.X, it is assumed that all calls from the | ||
2424 | * "midlayer" (which we are emulating) will have the | ||
2425 | * ahc host lock held. For other kernels, the | ||
2426 | * io_request_lock must be held. | ||
2427 | */ | ||
2428 | #if AHC_SCSI_HAS_HOST_LOCK != 0 | ||
2429 | ahc_lock(ahc, &s); | ||
2430 | #else | ||
2431 | spin_lock_irqsave(&io_request_lock, s); | ||
2432 | #endif | ||
2433 | ahc_linux_queue(cmd, ahc_linux_dv_complete); | ||
2434 | #if AHC_SCSI_HAS_HOST_LOCK != 0 | ||
2435 | ahc_unlock(ahc, &s); | ||
2436 | #else | ||
2437 | spin_unlock_irqrestore(&io_request_lock, s); | ||
2438 | #endif | ||
2439 | down_interruptible(&ahc->platform_data->dv_cmd_sem); | ||
2440 | /* | ||
2441 | * Wait for the SIMQ to be released so that DV is the | ||
2442 | * only reason the queue is frozen. | ||
2443 | */ | ||
2444 | ahc_lock(ahc, &s); | ||
2445 | while (AHC_DV_SIMQ_FROZEN(ahc) == 0) { | ||
2446 | ahc->platform_data->flags |= AHC_DV_WAIT_SIMQ_RELEASE; | ||
2447 | ahc_unlock(ahc, &s); | ||
2448 | down_interruptible(&ahc->platform_data->dv_sem); | ||
2449 | ahc_lock(ahc, &s); | ||
2450 | } | ||
2451 | ahc_unlock(ahc, &s); | ||
2452 | |||
2453 | ahc_linux_dv_transition(ahc, cmd, &devinfo, targ); | ||
2454 | } | ||
2455 | |||
2456 | out: | ||
2457 | if ((targ->flags & AHC_INQ_VALID) != 0 | ||
2458 | && ahc_linux_get_device(ahc, devinfo.channel - 'A', | ||
2459 | devinfo.target, devinfo.lun, | ||
2460 | /*alloc*/FALSE) == NULL) { | ||
2461 | /* | ||
2462 | * The DV state machine failed to configure this device. | ||
2463 | * This is normal if DV is disabled. Since we have inquiry | ||
2464 | * data, filter it and use the "optimistic" negotiation | ||
2465 | * parameters found in the inquiry string. | ||
2466 | */ | ||
2467 | ahc_linux_filter_inquiry(ahc, &devinfo); | ||
2468 | if ((targ->flags & (AHC_BASIC_DV|AHC_ENHANCED_DV)) != 0) { | ||
2469 | ahc_print_devinfo(ahc, &devinfo); | ||
2470 | printf("DV failed to configure device. " | ||
2471 | "Please file a bug report against " | ||
2472 | "this driver.\n"); | ||
2473 | } | ||
2474 | } | ||
2475 | |||
2476 | if (cmd != NULL) | ||
2477 | free(cmd, M_DEVBUF); | ||
2478 | |||
2479 | if (ahc->platform_data->dv_scsi_dev != NULL) { | ||
2480 | free(ahc->platform_data->dv_scsi_dev, M_DEVBUF); | ||
2481 | ahc->platform_data->dv_scsi_dev = NULL; | ||
2482 | } | ||
2483 | |||
2484 | ahc_lock(ahc, &s); | ||
2485 | if (targ->dv_buffer != NULL) { | ||
2486 | free(targ->dv_buffer, M_DEVBUF); | ||
2487 | targ->dv_buffer = NULL; | ||
2488 | } | ||
2489 | if (targ->dv_buffer1 != NULL) { | ||
2490 | free(targ->dv_buffer1, M_DEVBUF); | ||
2491 | targ->dv_buffer1 = NULL; | ||
2492 | } | ||
2493 | targ->flags &= ~AHC_DV_REQUIRED; | ||
2494 | if (targ->refcount == 0) | ||
2495 | ahc_linux_free_target(ahc, targ); | ||
2496 | ahc_unlock(ahc, &s); | ||
2497 | } | ||
2498 | |||
2499 | static void | ||
2500 | ahc_linux_dv_transition(struct ahc_softc *ahc, struct scsi_cmnd *cmd, | ||
2501 | struct ahc_devinfo *devinfo, | ||
2502 | struct ahc_linux_target *targ) | ||
2503 | { | ||
2504 | u_int32_t status; | ||
2505 | |||
2506 | status = aic_error_action(cmd, targ->inq_data, | ||
2507 | ahc_cmd_get_transaction_status(cmd), | ||
2508 | ahc_cmd_get_scsi_status(cmd)); | ||
2509 | |||
2510 | #ifdef AHC_DEBUG | ||
2511 | if (ahc_debug & AHC_SHOW_DV) { | ||
2512 | ahc_print_devinfo(ahc, devinfo); | ||
2513 | printf("Entering ahc_linux_dv_transition, state= %d, " | ||
2514 | "status= 0x%x, cmd->result= 0x%x\n", targ->dv_state, | ||
2515 | status, cmd->result); | ||
2516 | } | ||
2517 | #endif | ||
2518 | |||
2519 | switch (targ->dv_state) { | ||
2520 | case AHC_DV_STATE_INQ_SHORT_ASYNC: | ||
2521 | case AHC_DV_STATE_INQ_ASYNC: | ||
2522 | switch (status & SS_MASK) { | ||
2523 | case SS_NOP: | ||
2524 | { | ||
2525 | AHC_SET_DV_STATE(ahc, targ, targ->dv_state+1); | ||
2526 | break; | ||
2527 | } | ||
2528 | case SS_INQ_REFRESH: | ||
2529 | AHC_SET_DV_STATE(ahc, targ, | ||
2530 | AHC_DV_STATE_INQ_SHORT_ASYNC); | ||
2531 | break; | ||
2532 | case SS_TUR: | ||
2533 | case SS_RETRY: | ||
2534 | AHC_SET_DV_STATE(ahc, targ, targ->dv_state); | ||
2535 | if (ahc_cmd_get_transaction_status(cmd) | ||
2536 | == CAM_REQUEUE_REQ) | ||
2537 | targ->dv_state_retry--; | ||
2538 | if ((status & SS_ERRMASK) == EBUSY) | ||
2539 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY); | ||
2540 | if (targ->dv_state_retry < 10) | ||
2541 | break; | ||
2542 | /* FALLTHROUGH */ | ||
2543 | default: | ||
2544 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2545 | #ifdef AHC_DEBUG | ||
2546 | if (ahc_debug & AHC_SHOW_DV) { | ||
2547 | ahc_print_devinfo(ahc, devinfo); | ||
2548 | printf("Failed DV inquiry, skipping\n"); | ||
2549 | } | ||
2550 | #endif | ||
2551 | break; | ||
2552 | } | ||
2553 | break; | ||
2554 | case AHC_DV_STATE_INQ_ASYNC_VERIFY: | ||
2555 | switch (status & SS_MASK) { | ||
2556 | case SS_NOP: | ||
2557 | { | ||
2558 | u_int xportflags; | ||
2559 | u_int spi3data; | ||
2560 | |||
2561 | if (memcmp(targ->inq_data, targ->dv_buffer, | ||
2562 | AHC_LINUX_DV_INQ_LEN) != 0) { | ||
2563 | /* | ||
2564 | * Inquiry data must have changed. | ||
2565 | * Try from the top again. | ||
2566 | */ | ||
2567 | AHC_SET_DV_STATE(ahc, targ, | ||
2568 | AHC_DV_STATE_INQ_SHORT_ASYNC); | ||
2569 | break; | ||
2570 | } | ||
2571 | |||
2572 | AHC_SET_DV_STATE(ahc, targ, targ->dv_state+1); | ||
2573 | targ->flags |= AHC_INQ_VALID; | ||
2574 | if (ahc_linux_user_dv_setting(ahc) == 0) | ||
2575 | break; | ||
2576 | |||
2577 | xportflags = targ->inq_data->flags; | ||
2578 | if ((xportflags & (SID_Sync|SID_WBus16)) == 0) | ||
2579 | break; | ||
2580 | |||
2581 | spi3data = targ->inq_data->spi3data; | ||
2582 | switch (spi3data & SID_SPI_CLOCK_DT_ST) { | ||
2583 | default: | ||
2584 | case SID_SPI_CLOCK_ST: | ||
2585 | /* Assume only basic DV is supported. */ | ||
2586 | targ->flags |= AHC_BASIC_DV; | ||
2587 | break; | ||
2588 | case SID_SPI_CLOCK_DT: | ||
2589 | case SID_SPI_CLOCK_DT_ST: | ||
2590 | targ->flags |= AHC_ENHANCED_DV; | ||
2591 | break; | ||
2592 | } | ||
2593 | break; | ||
2594 | } | ||
2595 | case SS_INQ_REFRESH: | ||
2596 | AHC_SET_DV_STATE(ahc, targ, | ||
2597 | AHC_DV_STATE_INQ_SHORT_ASYNC); | ||
2598 | break; | ||
2599 | case SS_TUR: | ||
2600 | case SS_RETRY: | ||
2601 | AHC_SET_DV_STATE(ahc, targ, targ->dv_state); | ||
2602 | if (ahc_cmd_get_transaction_status(cmd) | ||
2603 | == CAM_REQUEUE_REQ) | ||
2604 | targ->dv_state_retry--; | ||
2605 | |||
2606 | if ((status & SS_ERRMASK) == EBUSY) | ||
2607 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY); | ||
2608 | if (targ->dv_state_retry < 10) | ||
2609 | break; | ||
2610 | /* FALLTHROUGH */ | ||
2611 | default: | ||
2612 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2613 | #ifdef AHC_DEBUG | ||
2614 | if (ahc_debug & AHC_SHOW_DV) { | ||
2615 | ahc_print_devinfo(ahc, devinfo); | ||
2616 | printf("Failed DV inquiry, skipping\n"); | ||
2617 | } | ||
2618 | #endif | ||
2619 | break; | ||
2620 | } | ||
2621 | break; | ||
2622 | case AHC_DV_STATE_INQ_VERIFY: | ||
2623 | switch (status & SS_MASK) { | ||
2624 | case SS_NOP: | ||
2625 | { | ||
2626 | |||
2627 | if (memcmp(targ->inq_data, targ->dv_buffer, | ||
2628 | AHC_LINUX_DV_INQ_LEN) == 0) { | ||
2629 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2630 | break; | ||
2631 | } | ||
2632 | #ifdef AHC_DEBUG | ||
2633 | if (ahc_debug & AHC_SHOW_DV) { | ||
2634 | int i; | ||
2635 | |||
2636 | ahc_print_devinfo(ahc, devinfo); | ||
2637 | printf("Inquiry buffer mismatch:"); | ||
2638 | for (i = 0; i < AHC_LINUX_DV_INQ_LEN; i++) { | ||
2639 | if ((i & 0xF) == 0) | ||
2640 | printf("\n "); | ||
2641 | printf("0x%x:0x0%x ", | ||
2642 | ((uint8_t *)targ->inq_data)[i], | ||
2643 | targ->dv_buffer[i]); | ||
2644 | } | ||
2645 | printf("\n"); | ||
2646 | } | ||
2647 | #endif | ||
2648 | |||
2649 | if (ahc_linux_fallback(ahc, devinfo) != 0) { | ||
2650 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2651 | break; | ||
2652 | } | ||
2653 | /* | ||
2654 | * Do not count "falling back" | ||
2655 | * against our retries. | ||
2656 | */ | ||
2657 | targ->dv_state_retry = 0; | ||
2658 | AHC_SET_DV_STATE(ahc, targ, targ->dv_state); | ||
2659 | break; | ||
2660 | } | ||
2661 | case SS_INQ_REFRESH: | ||
2662 | AHC_SET_DV_STATE(ahc, targ, | ||
2663 | AHC_DV_STATE_INQ_SHORT_ASYNC); | ||
2664 | break; | ||
2665 | case SS_TUR: | ||
2666 | case SS_RETRY: | ||
2667 | AHC_SET_DV_STATE(ahc, targ, targ->dv_state); | ||
2668 | if (ahc_cmd_get_transaction_status(cmd) | ||
2669 | == CAM_REQUEUE_REQ) { | ||
2670 | targ->dv_state_retry--; | ||
2671 | } else if ((status & SSQ_FALLBACK) != 0) { | ||
2672 | if (ahc_linux_fallback(ahc, devinfo) != 0) { | ||
2673 | AHC_SET_DV_STATE(ahc, targ, | ||
2674 | AHC_DV_STATE_EXIT); | ||
2675 | break; | ||
2676 | } | ||
2677 | /* | ||
2678 | * Do not count "falling back" | ||
2679 | * against our retries. | ||
2680 | */ | ||
2681 | targ->dv_state_retry = 0; | ||
2682 | } else if ((status & SS_ERRMASK) == EBUSY) | ||
2683 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY); | ||
2684 | if (targ->dv_state_retry < 10) | ||
2685 | break; | ||
2686 | /* FALLTHROUGH */ | ||
2687 | default: | ||
2688 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2689 | #ifdef AHC_DEBUG | ||
2690 | if (ahc_debug & AHC_SHOW_DV) { | ||
2691 | ahc_print_devinfo(ahc, devinfo); | ||
2692 | printf("Failed DV inquiry, skipping\n"); | ||
2693 | } | ||
2694 | #endif | ||
2695 | break; | ||
2696 | } | ||
2697 | break; | ||
2698 | |||
2699 | case AHC_DV_STATE_TUR: | ||
2700 | switch (status & SS_MASK) { | ||
2701 | case SS_NOP: | ||
2702 | if ((targ->flags & AHC_BASIC_DV) != 0) { | ||
2703 | ahc_linux_filter_inquiry(ahc, devinfo); | ||
2704 | AHC_SET_DV_STATE(ahc, targ, | ||
2705 | AHC_DV_STATE_INQ_VERIFY); | ||
2706 | } else if ((targ->flags & AHC_ENHANCED_DV) != 0) { | ||
2707 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_REBD); | ||
2708 | } else { | ||
2709 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2710 | } | ||
2711 | break; | ||
2712 | case SS_RETRY: | ||
2713 | case SS_TUR: | ||
2714 | if ((status & SS_ERRMASK) == EBUSY) { | ||
2715 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_BUSY); | ||
2716 | break; | ||
2717 | } | ||
2718 | AHC_SET_DV_STATE(ahc, targ, targ->dv_state); | ||
2719 | if (ahc_cmd_get_transaction_status(cmd) | ||
2720 | == CAM_REQUEUE_REQ) { | ||
2721 | targ->dv_state_retry--; | ||
2722 | } else if ((status & SSQ_FALLBACK) != 0) { | ||
2723 | if (ahc_linux_fallback(ahc, devinfo) != 0) { | ||
2724 | AHC_SET_DV_STATE(ahc, targ, | ||
2725 | AHC_DV_STATE_EXIT); | ||
2726 | break; | ||
2727 | } | ||
2728 | /* | ||
2729 | * Do not count "falling back" | ||
2730 | * against our retries. | ||
2731 | */ | ||
2732 | targ->dv_state_retry = 0; | ||
2733 | } | ||
2734 | if (targ->dv_state_retry >= 10) { | ||
2735 | #ifdef AHC_DEBUG | ||
2736 | if (ahc_debug & AHC_SHOW_DV) { | ||
2737 | ahc_print_devinfo(ahc, devinfo); | ||
2738 | printf("DV TUR reties exhausted\n"); | ||
2739 | } | ||
2740 | #endif | ||
2741 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2742 | break; | ||
2743 | } | ||
2744 | if (status & SSQ_DELAY) | ||
2745 | ssleep(1); | ||
2746 | |||
2747 | break; | ||
2748 | case SS_START: | ||
2749 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_SU); | ||
2750 | break; | ||
2751 | case SS_INQ_REFRESH: | ||
2752 | AHC_SET_DV_STATE(ahc, targ, | ||
2753 | AHC_DV_STATE_INQ_SHORT_ASYNC); | ||
2754 | break; | ||
2755 | default: | ||
2756 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2757 | break; | ||
2758 | } | ||
2759 | break; | ||
2760 | |||
2761 | case AHC_DV_STATE_REBD: | ||
2762 | switch (status & SS_MASK) { | ||
2763 | case SS_NOP: | ||
2764 | { | ||
2765 | uint32_t echo_size; | ||
2766 | |||
2767 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_WEB); | ||
2768 | echo_size = scsi_3btoul(&targ->dv_buffer[1]); | ||
2769 | echo_size &= 0x1FFF; | ||
2770 | #ifdef AHC_DEBUG | ||
2771 | if (ahc_debug & AHC_SHOW_DV) { | ||
2772 | ahc_print_devinfo(ahc, devinfo); | ||
2773 | printf("Echo buffer size= %d\n", echo_size); | ||
2774 | } | ||
2775 | #endif | ||
2776 | if (echo_size == 0) { | ||
2777 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2778 | break; | ||
2779 | } | ||
2780 | |||
2781 | /* Generate the buffer pattern */ | ||
2782 | targ->dv_echo_size = echo_size; | ||
2783 | ahc_linux_generate_dv_pattern(targ); | ||
2784 | /* | ||
2785 | * Setup initial negotiation values. | ||
2786 | */ | ||
2787 | ahc_linux_filter_inquiry(ahc, devinfo); | ||
2788 | break; | ||
2789 | } | ||
2790 | case SS_INQ_REFRESH: | ||
2791 | AHC_SET_DV_STATE(ahc, targ, | ||
2792 | AHC_DV_STATE_INQ_SHORT_ASYNC); | ||
2793 | break; | ||
2794 | case SS_RETRY: | ||
2795 | AHC_SET_DV_STATE(ahc, targ, targ->dv_state); | ||
2796 | if (ahc_cmd_get_transaction_status(cmd) | ||
2797 | == CAM_REQUEUE_REQ) | ||
2798 | targ->dv_state_retry--; | ||
2799 | if (targ->dv_state_retry <= 10) | ||
2800 | break; | ||
2801 | #ifdef AHC_DEBUG | ||
2802 | if (ahc_debug & AHC_SHOW_DV) { | ||
2803 | ahc_print_devinfo(ahc, devinfo); | ||
2804 | printf("DV REBD reties exhausted\n"); | ||
2805 | } | ||
2806 | #endif | ||
2807 | /* FALLTHROUGH */ | ||
2808 | case SS_FATAL: | ||
2809 | default: | ||
2810 | /* | ||
2811 | * Setup initial negotiation values | ||
2812 | * and try level 1 DV. | ||
2813 | */ | ||
2814 | ahc_linux_filter_inquiry(ahc, devinfo); | ||
2815 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_INQ_VERIFY); | ||
2816 | targ->dv_echo_size = 0; | ||
2817 | break; | ||
2818 | } | ||
2819 | break; | ||
2820 | |||
2821 | case AHC_DV_STATE_WEB: | ||
2822 | switch (status & SS_MASK) { | ||
2823 | case SS_NOP: | ||
2824 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_REB); | ||
2825 | break; | ||
2826 | case SS_INQ_REFRESH: | ||
2827 | AHC_SET_DV_STATE(ahc, targ, | ||
2828 | AHC_DV_STATE_INQ_SHORT_ASYNC); | ||
2829 | break; | ||
2830 | case SS_RETRY: | ||
2831 | AHC_SET_DV_STATE(ahc, targ, targ->dv_state); | ||
2832 | if (ahc_cmd_get_transaction_status(cmd) | ||
2833 | == CAM_REQUEUE_REQ) { | ||
2834 | targ->dv_state_retry--; | ||
2835 | } else if ((status & SSQ_FALLBACK) != 0) { | ||
2836 | if (ahc_linux_fallback(ahc, devinfo) != 0) { | ||
2837 | AHC_SET_DV_STATE(ahc, targ, | ||
2838 | AHC_DV_STATE_EXIT); | ||
2839 | break; | ||
2840 | } | ||
2841 | /* | ||
2842 | * Do not count "falling back" | ||
2843 | * against our retries. | ||
2844 | */ | ||
2845 | targ->dv_state_retry = 0; | ||
2846 | } | ||
2847 | if (targ->dv_state_retry <= 10) | ||
2848 | break; | ||
2849 | /* FALLTHROUGH */ | ||
2850 | #ifdef AHC_DEBUG | ||
2851 | if (ahc_debug & AHC_SHOW_DV) { | ||
2852 | ahc_print_devinfo(ahc, devinfo); | ||
2853 | printf("DV WEB reties exhausted\n"); | ||
2854 | } | ||
2855 | #endif | ||
2856 | default: | ||
2857 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2858 | break; | ||
2859 | } | ||
2860 | break; | ||
2861 | |||
2862 | case AHC_DV_STATE_REB: | ||
2863 | switch (status & SS_MASK) { | ||
2864 | case SS_NOP: | ||
2865 | if (memcmp(targ->dv_buffer, targ->dv_buffer1, | ||
2866 | targ->dv_echo_size) != 0) { | ||
2867 | if (ahc_linux_fallback(ahc, devinfo) != 0) | ||
2868 | AHC_SET_DV_STATE(ahc, targ, | ||
2869 | AHC_DV_STATE_EXIT); | ||
2870 | else | ||
2871 | AHC_SET_DV_STATE(ahc, targ, | ||
2872 | AHC_DV_STATE_WEB); | ||
2873 | break; | ||
2874 | } | ||
2875 | |||
2876 | if (targ->dv_buffer != NULL) { | ||
2877 | free(targ->dv_buffer, M_DEVBUF); | ||
2878 | targ->dv_buffer = NULL; | ||
2879 | } | ||
2880 | if (targ->dv_buffer1 != NULL) { | ||
2881 | free(targ->dv_buffer1, M_DEVBUF); | ||
2882 | targ->dv_buffer1 = NULL; | ||
2883 | } | ||
2884 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2885 | break; | ||
2886 | case SS_INQ_REFRESH: | ||
2887 | AHC_SET_DV_STATE(ahc, targ, | ||
2888 | AHC_DV_STATE_INQ_SHORT_ASYNC); | ||
2889 | break; | ||
2890 | case SS_RETRY: | ||
2891 | AHC_SET_DV_STATE(ahc, targ, targ->dv_state); | ||
2892 | if (ahc_cmd_get_transaction_status(cmd) | ||
2893 | == CAM_REQUEUE_REQ) { | ||
2894 | targ->dv_state_retry--; | ||
2895 | } else if ((status & SSQ_FALLBACK) != 0) { | ||
2896 | if (ahc_linux_fallback(ahc, devinfo) != 0) { | ||
2897 | AHC_SET_DV_STATE(ahc, targ, | ||
2898 | AHC_DV_STATE_EXIT); | ||
2899 | break; | ||
2900 | } | ||
2901 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_WEB); | ||
2902 | } | ||
2903 | if (targ->dv_state_retry <= 10) { | ||
2904 | if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0) | ||
2905 | msleep(ahc->our_id*1000/10); | ||
2906 | break; | ||
2907 | } | ||
2908 | #ifdef AHC_DEBUG | ||
2909 | if (ahc_debug & AHC_SHOW_DV) { | ||
2910 | ahc_print_devinfo(ahc, devinfo); | ||
2911 | printf("DV REB reties exhausted\n"); | ||
2912 | } | ||
2913 | #endif | ||
2914 | /* FALLTHROUGH */ | ||
2915 | default: | ||
2916 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2917 | break; | ||
2918 | } | ||
2919 | break; | ||
2920 | |||
2921 | case AHC_DV_STATE_SU: | ||
2922 | switch (status & SS_MASK) { | ||
2923 | case SS_NOP: | ||
2924 | case SS_INQ_REFRESH: | ||
2925 | AHC_SET_DV_STATE(ahc, targ, | ||
2926 | AHC_DV_STATE_INQ_SHORT_ASYNC); | ||
2927 | break; | ||
2928 | default: | ||
2929 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2930 | break; | ||
2931 | } | ||
2932 | break; | ||
2933 | |||
2934 | case AHC_DV_STATE_BUSY: | ||
2935 | switch (status & SS_MASK) { | ||
2936 | case SS_NOP: | ||
2937 | case SS_INQ_REFRESH: | ||
2938 | AHC_SET_DV_STATE(ahc, targ, | ||
2939 | AHC_DV_STATE_INQ_SHORT_ASYNC); | ||
2940 | break; | ||
2941 | case SS_TUR: | ||
2942 | case SS_RETRY: | ||
2943 | AHC_SET_DV_STATE(ahc, targ, targ->dv_state); | ||
2944 | if (ahc_cmd_get_transaction_status(cmd) | ||
2945 | == CAM_REQUEUE_REQ) { | ||
2946 | targ->dv_state_retry--; | ||
2947 | } else if (targ->dv_state_retry < 60) { | ||
2948 | if ((status & SSQ_DELAY) != 0) | ||
2949 | ssleep(1); | ||
2950 | } else { | ||
2951 | #ifdef AHC_DEBUG | ||
2952 | if (ahc_debug & AHC_SHOW_DV) { | ||
2953 | ahc_print_devinfo(ahc, devinfo); | ||
2954 | printf("DV BUSY reties exhausted\n"); | ||
2955 | } | ||
2956 | #endif | ||
2957 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2958 | } | ||
2959 | break; | ||
2960 | default: | ||
2961 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2962 | break; | ||
2963 | } | ||
2964 | break; | ||
2965 | |||
2966 | default: | ||
2967 | printf("%s: Invalid DV completion state %d\n", ahc_name(ahc), | ||
2968 | targ->dv_state); | ||
2969 | AHC_SET_DV_STATE(ahc, targ, AHC_DV_STATE_EXIT); | ||
2970 | break; | ||
2971 | } | ||
2972 | } | ||
2973 | |||
2974 | static void | ||
2975 | ahc_linux_dv_fill_cmd(struct ahc_softc *ahc, struct scsi_cmnd *cmd, | ||
2976 | struct ahc_devinfo *devinfo) | ||
2977 | { | ||
2978 | memset(cmd, 0, sizeof(struct scsi_cmnd)); | ||
2979 | cmd->device = ahc->platform_data->dv_scsi_dev; | ||
2980 | cmd->scsi_done = ahc_linux_dv_complete; | ||
2981 | } | ||
2982 | |||
2983 | /* | ||
2984 | * Synthesize an inquiry command. On the return trip, it'll be | ||
2985 | * sniffed and the device transfer settings set for us. | ||
2986 | */ | ||
2987 | static void | ||
2988 | ahc_linux_dv_inq(struct ahc_softc *ahc, struct scsi_cmnd *cmd, | ||
2989 | struct ahc_devinfo *devinfo, struct ahc_linux_target *targ, | ||
2990 | u_int request_length) | ||
2991 | { | ||
2992 | |||
2993 | #ifdef AHC_DEBUG | ||
2994 | if (ahc_debug & AHC_SHOW_DV) { | ||
2995 | ahc_print_devinfo(ahc, devinfo); | ||
2996 | printf("Sending INQ\n"); | ||
2997 | } | ||
2998 | #endif | ||
2999 | if (targ->inq_data == NULL) | ||
3000 | targ->inq_data = malloc(AHC_LINUX_DV_INQ_LEN, | ||
3001 | M_DEVBUF, M_WAITOK); | ||
3002 | if (targ->dv_state > AHC_DV_STATE_INQ_ASYNC) { | ||
3003 | if (targ->dv_buffer != NULL) | ||
3004 | free(targ->dv_buffer, M_DEVBUF); | ||
3005 | targ->dv_buffer = malloc(AHC_LINUX_DV_INQ_LEN, | ||
3006 | M_DEVBUF, M_WAITOK); | ||
3007 | } | ||
3008 | |||
3009 | ahc_linux_dv_fill_cmd(ahc, cmd, devinfo); | ||
3010 | cmd->sc_data_direction = SCSI_DATA_READ; | ||
3011 | cmd->cmd_len = 6; | ||
3012 | cmd->cmnd[0] = INQUIRY; | ||
3013 | cmd->cmnd[4] = request_length; | ||
3014 | cmd->request_bufflen = request_length; | ||
3015 | if (targ->dv_state > AHC_DV_STATE_INQ_ASYNC) | ||
3016 | cmd->request_buffer = targ->dv_buffer; | ||
3017 | else | ||
3018 | cmd->request_buffer = targ->inq_data; | ||
3019 | memset(cmd->request_buffer, 0, AHC_LINUX_DV_INQ_LEN); | ||
3020 | } | ||
3021 | |||
3022 | static void | ||
3023 | ahc_linux_dv_tur(struct ahc_softc *ahc, struct scsi_cmnd *cmd, | ||
3024 | struct ahc_devinfo *devinfo) | ||
3025 | { | ||
3026 | |||
3027 | #ifdef AHC_DEBUG | ||
3028 | if (ahc_debug & AHC_SHOW_DV) { | ||
3029 | ahc_print_devinfo(ahc, devinfo); | ||
3030 | printf("Sending TUR\n"); | ||
3031 | } | ||
3032 | #endif | ||
3033 | /* Do a TUR to clear out any non-fatal transitional state */ | ||
3034 | ahc_linux_dv_fill_cmd(ahc, cmd, devinfo); | ||
3035 | cmd->sc_data_direction = SCSI_DATA_NONE; | ||
3036 | cmd->cmd_len = 6; | ||
3037 | cmd->cmnd[0] = TEST_UNIT_READY; | ||
3038 | } | ||
3039 | |||
3040 | #define AHC_REBD_LEN 4 | ||
3041 | |||
3042 | static void | ||
3043 | ahc_linux_dv_rebd(struct ahc_softc *ahc, struct scsi_cmnd *cmd, | ||
3044 | struct ahc_devinfo *devinfo, struct ahc_linux_target *targ) | ||
3045 | { | ||
3046 | |||
3047 | #ifdef AHC_DEBUG | ||
3048 | if (ahc_debug & AHC_SHOW_DV) { | ||
3049 | ahc_print_devinfo(ahc, devinfo); | ||
3050 | printf("Sending REBD\n"); | ||
3051 | } | ||
3052 | #endif | ||
3053 | if (targ->dv_buffer != NULL) | ||
3054 | free(targ->dv_buffer, M_DEVBUF); | ||
3055 | targ->dv_buffer = malloc(AHC_REBD_LEN, M_DEVBUF, M_WAITOK); | ||
3056 | ahc_linux_dv_fill_cmd(ahc, cmd, devinfo); | ||
3057 | cmd->sc_data_direction = SCSI_DATA_READ; | ||
3058 | cmd->cmd_len = 10; | ||
3059 | cmd->cmnd[0] = READ_BUFFER; | ||
3060 | cmd->cmnd[1] = 0x0b; | ||
3061 | scsi_ulto3b(AHC_REBD_LEN, &cmd->cmnd[6]); | ||
3062 | cmd->request_bufflen = AHC_REBD_LEN; | ||
3063 | cmd->underflow = cmd->request_bufflen; | ||
3064 | cmd->request_buffer = targ->dv_buffer; | ||
3065 | } | ||
3066 | |||
3067 | static void | ||
3068 | ahc_linux_dv_web(struct ahc_softc *ahc, struct scsi_cmnd *cmd, | ||
3069 | struct ahc_devinfo *devinfo, struct ahc_linux_target *targ) | ||
3070 | { | ||
3071 | |||
3072 | #ifdef AHC_DEBUG | ||
3073 | if (ahc_debug & AHC_SHOW_DV) { | ||
3074 | ahc_print_devinfo(ahc, devinfo); | ||
3075 | printf("Sending WEB\n"); | ||
3076 | } | ||
3077 | #endif | ||
3078 | ahc_linux_dv_fill_cmd(ahc, cmd, devinfo); | ||
3079 | cmd->sc_data_direction = SCSI_DATA_WRITE; | ||
3080 | cmd->cmd_len = 10; | ||
3081 | cmd->cmnd[0] = WRITE_BUFFER; | ||
3082 | cmd->cmnd[1] = 0x0a; | ||
3083 | scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]); | ||
3084 | cmd->request_bufflen = targ->dv_echo_size; | ||
3085 | cmd->underflow = cmd->request_bufflen; | ||
3086 | cmd->request_buffer = targ->dv_buffer; | ||
3087 | } | ||
3088 | |||
3089 | static void | ||
3090 | ahc_linux_dv_reb(struct ahc_softc *ahc, struct scsi_cmnd *cmd, | ||
3091 | struct ahc_devinfo *devinfo, struct ahc_linux_target *targ) | ||
3092 | { | ||
3093 | |||
3094 | #ifdef AHC_DEBUG | ||
3095 | if (ahc_debug & AHC_SHOW_DV) { | ||
3096 | ahc_print_devinfo(ahc, devinfo); | ||
3097 | printf("Sending REB\n"); | ||
3098 | } | ||
3099 | #endif | ||
3100 | ahc_linux_dv_fill_cmd(ahc, cmd, devinfo); | ||
3101 | cmd->sc_data_direction = SCSI_DATA_READ; | ||
3102 | cmd->cmd_len = 10; | ||
3103 | cmd->cmnd[0] = READ_BUFFER; | ||
3104 | cmd->cmnd[1] = 0x0a; | ||
3105 | scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]); | ||
3106 | cmd->request_bufflen = targ->dv_echo_size; | ||
3107 | cmd->underflow = cmd->request_bufflen; | ||
3108 | cmd->request_buffer = targ->dv_buffer1; | ||
3109 | } | ||
3110 | |||
3111 | static void | ||
3112 | ahc_linux_dv_su(struct ahc_softc *ahc, struct scsi_cmnd *cmd, | ||
3113 | struct ahc_devinfo *devinfo, | ||
3114 | struct ahc_linux_target *targ) | ||
3115 | { | ||
3116 | u_int le; | ||
3117 | |||
3118 | le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0; | ||
3119 | |||
3120 | #ifdef AHC_DEBUG | ||
3121 | if (ahc_debug & AHC_SHOW_DV) { | ||
3122 | ahc_print_devinfo(ahc, devinfo); | ||
3123 | printf("Sending SU\n"); | ||
3124 | } | ||
3125 | #endif | ||
3126 | ahc_linux_dv_fill_cmd(ahc, cmd, devinfo); | ||
3127 | cmd->sc_data_direction = SCSI_DATA_NONE; | ||
3128 | cmd->cmd_len = 6; | ||
3129 | cmd->cmnd[0] = START_STOP_UNIT; | ||
3130 | cmd->cmnd[4] = le | SSS_START; | ||
3131 | } | ||
3132 | |||
3133 | static int | ||
3134 | ahc_linux_fallback(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) | ||
3135 | { | ||
3136 | struct ahc_linux_target *targ; | ||
3137 | struct ahc_initiator_tinfo *tinfo; | ||
3138 | struct ahc_transinfo *goal; | ||
3139 | struct ahc_tmode_tstate *tstate; | ||
3140 | struct ahc_syncrate *syncrate; | ||
3141 | u_long s; | ||
3142 | u_int width; | ||
3143 | u_int period; | ||
3144 | u_int offset; | ||
3145 | u_int ppr_options; | ||
3146 | u_int cur_speed; | ||
3147 | u_int wide_speed; | ||
3148 | u_int narrow_speed; | ||
3149 | u_int fallback_speed; | ||
3150 | |||
3151 | #ifdef AHC_DEBUG | ||
3152 | if (ahc_debug & AHC_SHOW_DV) { | ||
3153 | ahc_print_devinfo(ahc, devinfo); | ||
3154 | printf("Trying to fallback\n"); | ||
3155 | } | ||
3156 | #endif | ||
3157 | ahc_lock(ahc, &s); | ||
3158 | targ = ahc->platform_data->targets[devinfo->target_offset]; | ||
3159 | tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, | ||
3160 | devinfo->our_scsiid, | ||
3161 | devinfo->target, &tstate); | ||
3162 | goal = &tinfo->goal; | ||
3163 | width = goal->width; | ||
3164 | period = goal->period; | ||
3165 | offset = goal->offset; | ||
3166 | ppr_options = goal->ppr_options; | ||
3167 | if (offset == 0) | ||
3168 | period = AHC_ASYNC_XFER_PERIOD; | ||
3169 | if (targ->dv_next_narrow_period == 0) | ||
3170 | targ->dv_next_narrow_period = MAX(period, AHC_SYNCRATE_ULTRA2); | ||
3171 | if (targ->dv_next_wide_period == 0) | ||
3172 | targ->dv_next_wide_period = period; | ||
3173 | if (targ->dv_max_width == 0) | ||
3174 | targ->dv_max_width = width; | ||
3175 | if (targ->dv_max_ppr_options == 0) | ||
3176 | targ->dv_max_ppr_options = ppr_options; | ||
3177 | if (targ->dv_last_ppr_options == 0) | ||
3178 | targ->dv_last_ppr_options = ppr_options; | ||
3179 | |||
3180 | cur_speed = aic_calc_speed(width, period, offset, AHC_SYNCRATE_MIN); | ||
3181 | wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT, | ||
3182 | targ->dv_next_wide_period, | ||
3183 | MAX_OFFSET, | ||
3184 | AHC_SYNCRATE_MIN); | ||
3185 | narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT, | ||
3186 | targ->dv_next_narrow_period, | ||
3187 | MAX_OFFSET, | ||
3188 | AHC_SYNCRATE_MIN); | ||
3189 | fallback_speed = aic_calc_speed(width, period+1, offset, | ||
3190 | AHC_SYNCRATE_MIN); | ||
3191 | #ifdef AHC_DEBUG | ||
3192 | if (ahc_debug & AHC_SHOW_DV) { | ||
3193 | printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, " | ||
3194 | "fallback_speed= %d\n", cur_speed, wide_speed, | ||
3195 | narrow_speed, fallback_speed); | ||
3196 | } | ||
3197 | #endif | ||
3198 | |||
3199 | if (cur_speed > 160000) { | ||
3200 | /* | ||
3201 | * Paced/DT/IU_REQ only transfer speeds. All we | ||
3202 | * can do is fallback in terms of syncrate. | ||
3203 | */ | ||
3204 | period++; | ||
3205 | } else if (cur_speed > 80000) { | ||
3206 | if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { | ||
3207 | /* | ||
3208 | * Try without IU_REQ as it may be confusing | ||
3209 | * an expander. | ||
3210 | */ | ||
3211 | ppr_options &= ~MSG_EXT_PPR_IU_REQ; | ||
3212 | } else { | ||
3213 | /* | ||
3214 | * Paced/DT only transfer speeds. All we | ||
3215 | * can do is fallback in terms of syncrate. | ||
3216 | */ | ||
3217 | period++; | ||
3218 | ppr_options = targ->dv_max_ppr_options; | ||
3219 | } | ||
3220 | } else if (cur_speed > 3300) { | ||
3221 | |||
3222 | /* | ||
3223 | * In this range we the following | ||
3224 | * options ordered from highest to | ||
3225 | * lowest desireability: | ||
3226 | * | ||
3227 | * o Wide/DT | ||
3228 | * o Wide/non-DT | ||
3229 | * o Narrow at a potentally higher sync rate. | ||
3230 | * | ||
3231 | * All modes are tested with and without IU_REQ | ||
3232 | * set since using IUs may confuse an expander. | ||
3233 | */ | ||
3234 | if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { | ||
3235 | |||
3236 | ppr_options &= ~MSG_EXT_PPR_IU_REQ; | ||
3237 | } else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) { | ||
3238 | /* | ||
3239 | * Try going non-DT. | ||
3240 | */ | ||
3241 | ppr_options = targ->dv_max_ppr_options; | ||
3242 | ppr_options &= ~MSG_EXT_PPR_DT_REQ; | ||
3243 | } else if (targ->dv_last_ppr_options != 0) { | ||
3244 | /* | ||
3245 | * Try without QAS or any other PPR options. | ||
3246 | * We may need a non-PPR message to work with | ||
3247 | * an expander. We look at the "last PPR options" | ||
3248 | * so we will perform this fallback even if the | ||
3249 | * target responded to our PPR negotiation with | ||
3250 | * no option bits set. | ||
3251 | */ | ||
3252 | ppr_options = 0; | ||
3253 | } else if (width == MSG_EXT_WDTR_BUS_16_BIT) { | ||
3254 | /* | ||
3255 | * If the next narrow speed is greater than | ||
3256 | * the next wide speed, fallback to narrow. | ||
3257 | * Otherwise fallback to the next DT/Wide setting. | ||
3258 | * The narrow async speed will always be smaller | ||
3259 | * than the wide async speed, so handle this case | ||
3260 | * specifically. | ||
3261 | */ | ||
3262 | ppr_options = targ->dv_max_ppr_options; | ||
3263 | if (narrow_speed > fallback_speed | ||
3264 | || period >= AHC_ASYNC_XFER_PERIOD) { | ||
3265 | targ->dv_next_wide_period = period+1; | ||
3266 | width = MSG_EXT_WDTR_BUS_8_BIT; | ||
3267 | period = targ->dv_next_narrow_period; | ||
3268 | } else { | ||
3269 | period++; | ||
3270 | } | ||
3271 | } else if ((ahc->features & AHC_WIDE) != 0 | ||
3272 | && targ->dv_max_width != 0 | ||
3273 | && wide_speed >= fallback_speed | ||
3274 | && (targ->dv_next_wide_period <= AHC_ASYNC_XFER_PERIOD | ||
3275 | || period >= AHC_ASYNC_XFER_PERIOD)) { | ||
3276 | |||
3277 | /* | ||
3278 | * We are narrow. Try falling back | ||
3279 | * to the next wide speed with | ||
3280 | * all supported ppr options set. | ||
3281 | */ | ||
3282 | targ->dv_next_narrow_period = period+1; | ||
3283 | width = MSG_EXT_WDTR_BUS_16_BIT; | ||
3284 | period = targ->dv_next_wide_period; | ||
3285 | ppr_options = targ->dv_max_ppr_options; | ||
3286 | } else { | ||
3287 | /* Only narrow fallback is allowed. */ | ||
3288 | period++; | ||
3289 | ppr_options = targ->dv_max_ppr_options; | ||
3290 | } | ||
3291 | } else { | ||
3292 | ahc_unlock(ahc, &s); | ||
3293 | return (-1); | ||
3294 | } | ||
3295 | offset = MAX_OFFSET; | ||
3296 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, | ||
3297 | AHC_SYNCRATE_DT); | ||
3298 | ahc_set_width(ahc, devinfo, width, AHC_TRANS_GOAL, FALSE); | ||
3299 | if (period == 0) { | ||
3300 | period = 0; | ||
3301 | offset = 0; | ||
3302 | ppr_options = 0; | ||
3303 | if (width == MSG_EXT_WDTR_BUS_8_BIT) | ||
3304 | targ->dv_next_narrow_period = AHC_ASYNC_XFER_PERIOD; | ||
3305 | else | ||
3306 | targ->dv_next_wide_period = AHC_ASYNC_XFER_PERIOD; | ||
3307 | } | ||
3308 | ahc_set_syncrate(ahc, devinfo, syncrate, period, offset, | ||
3309 | ppr_options, AHC_TRANS_GOAL, FALSE); | ||
3310 | targ->dv_last_ppr_options = ppr_options; | ||
3311 | ahc_unlock(ahc, &s); | ||
3312 | return (0); | ||
3313 | } | ||
3314 | |||
3315 | static void | ||
3316 | ahc_linux_dv_timeout(struct scsi_cmnd *cmd) | ||
3317 | { | ||
3318 | struct ahc_softc *ahc; | ||
3319 | struct scb *scb; | ||
3320 | u_long flags; | ||
3321 | |||
3322 | ahc = *((struct ahc_softc **)cmd->device->host->hostdata); | ||
3323 | ahc_lock(ahc, &flags); | ||
3324 | |||
3325 | #ifdef AHC_DEBUG | ||
3326 | if (ahc_debug & AHC_SHOW_DV) { | ||
3327 | printf("%s: Timeout while doing DV command %x.\n", | ||
3328 | ahc_name(ahc), cmd->cmnd[0]); | ||
3329 | ahc_dump_card_state(ahc); | ||
3330 | } | ||
3331 | #endif | ||
3332 | |||
3333 | /* | ||
3334 | * Guard against "done race". No action is | ||
3335 | * required if we just completed. | ||
3336 | */ | ||
3337 | if ((scb = (struct scb *)cmd->host_scribble) == NULL) { | ||
3338 | ahc_unlock(ahc, &flags); | ||
3339 | return; | ||
3340 | } | ||
3341 | |||
3342 | /* | ||
3343 | * Command has not completed. Mark this | ||
3344 | * SCB as having failing status prior to | ||
3345 | * resetting the bus, so we get the correct | ||
3346 | * error code. | ||
3347 | */ | ||
3348 | if ((scb->flags & SCB_SENSE) != 0) | ||
3349 | ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL); | ||
3350 | else | ||
3351 | ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); | ||
3352 | ahc_reset_channel(ahc, cmd->device->channel + 'A', /*initiate*/TRUE); | ||
3353 | |||
3354 | /* | ||
3355 | * Add a minimal bus settle delay for devices that are slow to | ||
3356 | * respond after bus resets. | ||
3357 | */ | ||
3358 | ahc_linux_freeze_simq(ahc); | ||
3359 | init_timer(&ahc->platform_data->reset_timer); | ||
3360 | ahc->platform_data->reset_timer.data = (u_long)ahc; | ||
3361 | ahc->platform_data->reset_timer.expires = jiffies + HZ / 2; | ||
3362 | ahc->platform_data->reset_timer.function = | ||
3363 | (ahc_linux_callback_t *)ahc_linux_release_simq; | ||
3364 | add_timer(&ahc->platform_data->reset_timer); | ||
3365 | if (ahc_linux_next_device_to_run(ahc) != NULL) | ||
3366 | ahc_schedule_runq(ahc); | ||
3367 | ahc_linux_run_complete_queue(ahc); | ||
3368 | ahc_unlock(ahc, &flags); | ||
3369 | } | ||
3370 | |||
3371 | static void | ||
3372 | ahc_linux_dv_complete(struct scsi_cmnd *cmd) | ||
3373 | { | ||
3374 | struct ahc_softc *ahc; | ||
3375 | |||
3376 | ahc = *((struct ahc_softc **)cmd->device->host->hostdata); | ||
3377 | |||
3378 | /* Delete the DV timer before it goes off! */ | ||
3379 | scsi_delete_timer(cmd); | ||
3380 | |||
3381 | #ifdef AHC_DEBUG | ||
3382 | if (ahc_debug & AHC_SHOW_DV) | ||
3383 | printf("%s:%d:%d: Command completed, status= 0x%x\n", | ||
3384 | ahc_name(ahc), cmd->device->channel, | ||
3385 | cmd->device->id, cmd->result); | ||
3386 | #endif | ||
3387 | |||
3388 | /* Wake up the state machine */ | ||
3389 | up(&ahc->platform_data->dv_cmd_sem); | ||
3390 | } | ||
3391 | |||
3392 | static void | ||
3393 | ahc_linux_generate_dv_pattern(struct ahc_linux_target *targ) | ||
3394 | { | ||
3395 | uint16_t b; | ||
3396 | u_int i; | ||
3397 | u_int j; | ||
3398 | |||
3399 | if (targ->dv_buffer != NULL) | ||
3400 | free(targ->dv_buffer, M_DEVBUF); | ||
3401 | targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK); | ||
3402 | if (targ->dv_buffer1 != NULL) | ||
3403 | free(targ->dv_buffer1, M_DEVBUF); | ||
3404 | targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK); | ||
3405 | |||
3406 | i = 0; | ||
3407 | b = 0x0001; | ||
3408 | for (j = 0 ; i < targ->dv_echo_size; j++) { | ||
3409 | if (j < 32) { | ||
3410 | /* | ||
3411 | * 32bytes of sequential numbers. | ||
3412 | */ | ||
3413 | targ->dv_buffer[i++] = j & 0xff; | ||
3414 | } else if (j < 48) { | ||
3415 | /* | ||
3416 | * 32bytes of repeating 0x0000, 0xffff. | ||
3417 | */ | ||
3418 | targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00; | ||
3419 | } else if (j < 64) { | ||
3420 | /* | ||
3421 | * 32bytes of repeating 0x5555, 0xaaaa. | ||
3422 | */ | ||
3423 | targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55; | ||
3424 | } else { | ||
3425 | /* | ||
3426 | * Remaining buffer is filled with a repeating | ||
3427 | * patter of: | ||
3428 | * | ||
3429 | * 0xffff | ||
3430 | * ~0x0001 << shifted once in each loop. | ||
3431 | */ | ||
3432 | if (j & 0x02) { | ||
3433 | if (j & 0x01) { | ||
3434 | targ->dv_buffer[i++] = ~(b >> 8) & 0xff; | ||
3435 | b <<= 1; | ||
3436 | if (b == 0x0000) | ||
3437 | b = 0x0001; | ||
3438 | } else { | ||
3439 | targ->dv_buffer[i++] = (~b & 0xff); | ||
3440 | } | ||
3441 | } else { | ||
3442 | targ->dv_buffer[i++] = 0xff; | ||
3443 | } | ||
3444 | } | ||
3445 | } | ||
3446 | } | ||
3447 | |||
3448 | static u_int | ||
3449 | ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) | ||
3450 | { | ||
3451 | static int warned_user; | ||
3452 | u_int tags; | ||
3453 | |||
3454 | tags = 0; | ||
3455 | if ((ahc->user_discenable & devinfo->target_mask) != 0) { | ||
3456 | if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) { | ||
3457 | if (warned_user == 0) { | ||
3458 | |||
3459 | printf(KERN_WARNING | ||
3460 | "aic7xxx: WARNING: Insufficient tag_info instances\n" | ||
3461 | "aic7xxx: for installed controllers. Using defaults\n" | ||
3462 | "aic7xxx: Please update the aic7xxx_tag_info array in\n" | ||
3463 | "aic7xxx: the aic7xxx_osm..c source file.\n"); | ||
3464 | warned_user++; | ||
3465 | } | ||
3466 | tags = AHC_MAX_QUEUE; | ||
3467 | } else { | ||
3468 | adapter_tag_info_t *tag_info; | ||
3469 | |||
3470 | tag_info = &aic7xxx_tag_info[ahc->unit]; | ||
3471 | tags = tag_info->tag_commands[devinfo->target_offset]; | ||
3472 | if (tags > AHC_MAX_QUEUE) | ||
3473 | tags = AHC_MAX_QUEUE; | ||
3474 | } | ||
3475 | } | ||
3476 | return (tags); | ||
3477 | } | ||
3478 | |||
3479 | static u_int | ||
3480 | ahc_linux_user_dv_setting(struct ahc_softc *ahc) | ||
3481 | { | ||
3482 | static int warned_user; | ||
3483 | int dv; | ||
3484 | |||
3485 | if (ahc->unit >= NUM_ELEMENTS(aic7xxx_dv_settings)) { | ||
3486 | if (warned_user == 0) { | ||
3487 | |||
3488 | printf(KERN_WARNING | ||
3489 | "aic7xxx: WARNING: Insufficient dv settings instances\n" | ||
3490 | "aic7xxx: for installed controllers. Using defaults\n" | ||
3491 | "aic7xxx: Please update the aic7xxx_dv_settings array\n" | ||
3492 | "aic7xxx: in the aic7xxx_osm.c source file.\n"); | ||
3493 | warned_user++; | ||
3494 | } | ||
3495 | dv = -1; | ||
3496 | } else { | ||
3497 | |||
3498 | dv = aic7xxx_dv_settings[ahc->unit]; | ||
3499 | } | ||
3500 | |||
3501 | if (dv < 0) { | ||
3502 | u_long s; | ||
3503 | |||
3504 | /* | ||
3505 | * Apply the default. | ||
3506 | */ | ||
3507 | /* | ||
3508 | * XXX - Enable DV on non-U160 controllers once it | ||
3509 | * has been tested there. | ||
3510 | */ | ||
3511 | ahc_lock(ahc, &s); | ||
3512 | dv = (ahc->features & AHC_DT); | ||
3513 | if (ahc->seep_config != 0 | ||
3514 | && ahc->seep_config->signature >= CFSIGNATURE2) | ||
3515 | dv = (ahc->seep_config->adapter_control & CFENABLEDV); | ||
3516 | ahc_unlock(ahc, &s); | ||
3517 | } | ||
3518 | return (dv); | ||
3519 | } | ||
3520 | |||
3521 | /* | ||
3522 | * Determines the queue depth for a given device. | ||
3523 | */ | ||
3524 | static void | ||
3525 | ahc_linux_device_queue_depth(struct ahc_softc *ahc, | ||
3526 | struct ahc_linux_device *dev) | ||
3527 | { | ||
3528 | struct ahc_devinfo devinfo; | ||
3529 | u_int tags; | ||
3530 | |||
3531 | ahc_compile_devinfo(&devinfo, | ||
3532 | dev->target->channel == 0 | ||
3533 | ? ahc->our_id : ahc->our_id_b, | ||
3534 | dev->target->target, dev->lun, | ||
3535 | dev->target->channel == 0 ? 'A' : 'B', | ||
3536 | ROLE_INITIATOR); | ||
3537 | tags = ahc_linux_user_tagdepth(ahc, &devinfo); | ||
3538 | if (tags != 0 | ||
3539 | && dev->scsi_device != NULL | ||
3540 | && dev->scsi_device->tagged_supported != 0) { | ||
3541 | |||
3542 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED); | ||
3543 | ahc_print_devinfo(ahc, &devinfo); | ||
3544 | printf("Tagged Queuing enabled. Depth %d\n", tags); | ||
3545 | } else { | ||
3546 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE); | ||
3547 | } | ||
3548 | } | ||
3549 | |||
3550 | static void | ||
3551 | ahc_linux_run_device_queue(struct ahc_softc *ahc, struct ahc_linux_device *dev) | ||
3552 | { | ||
3553 | struct ahc_cmd *acmd; | ||
3554 | struct scsi_cmnd *cmd; | ||
3555 | struct scb *scb; | ||
3556 | struct hardware_scb *hscb; | ||
3557 | struct ahc_initiator_tinfo *tinfo; | ||
3558 | struct ahc_tmode_tstate *tstate; | ||
3559 | uint16_t mask; | ||
3560 | |||
3561 | if ((dev->flags & AHC_DEV_ON_RUN_LIST) != 0) | ||
3562 | panic("running device on run list"); | ||
3563 | |||
3564 | while ((acmd = TAILQ_FIRST(&dev->busyq)) != NULL | ||
3565 | && dev->openings > 0 && dev->qfrozen == 0) { | ||
3566 | |||
3567 | /* | ||
3568 | * Schedule us to run later. The only reason we are not | ||
3569 | * running is because the whole controller Q is frozen. | ||
3570 | */ | ||
3571 | if (ahc->platform_data->qfrozen != 0 | ||
3572 | && AHC_DV_SIMQ_FROZEN(ahc) == 0) { | ||
3573 | TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, | ||
3574 | dev, links); | ||
3575 | dev->flags |= AHC_DEV_ON_RUN_LIST; | ||
3576 | return; | ||
3577 | } | ||
3578 | /* | ||
3579 | * Get an scb to use. | ||
3580 | */ | ||
3581 | if ((scb = ahc_get_scb(ahc)) == NULL) { | ||
3582 | TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, | ||
3583 | dev, links); | ||
3584 | dev->flags |= AHC_DEV_ON_RUN_LIST; | ||
3585 | ahc->flags |= AHC_RESOURCE_SHORTAGE; | ||
3586 | return; | ||
3587 | } | ||
3588 | TAILQ_REMOVE(&dev->busyq, acmd, acmd_links.tqe); | ||
3589 | cmd = &acmd_scsi_cmd(acmd); | ||
3590 | scb->io_ctx = cmd; | ||
3591 | scb->platform_data->dev = dev; | ||
3592 | hscb = scb->hscb; | ||
3593 | cmd->host_scribble = (char *)scb; | ||
3594 | |||
3595 | /* | ||
3596 | * Fill out basics of the HSCB. | ||
3597 | */ | ||
3598 | hscb->control = 0; | ||
3599 | hscb->scsiid = BUILD_SCSIID(ahc, cmd); | ||
3600 | hscb->lun = cmd->device->lun; | ||
3601 | mask = SCB_GET_TARGET_MASK(ahc, scb); | ||
3602 | tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), | ||
3603 | SCB_GET_OUR_ID(scb), | ||
3604 | SCB_GET_TARGET(ahc, scb), &tstate); | ||
3605 | hscb->scsirate = tinfo->scsirate; | ||
3606 | hscb->scsioffset = tinfo->curr.offset; | ||
3607 | if ((tstate->ultraenb & mask) != 0) | ||
3608 | hscb->control |= ULTRAENB; | ||
3609 | |||
3610 | if ((ahc->user_discenable & mask) != 0) | ||
3611 | hscb->control |= DISCENB; | ||
3612 | |||
3613 | if (AHC_DV_CMD(cmd) != 0) | ||
3614 | scb->flags |= SCB_SILENT; | ||
3615 | |||
3616 | if ((tstate->auto_negotiate & mask) != 0) { | ||
3617 | scb->flags |= SCB_AUTO_NEGOTIATE; | ||
3618 | scb->hscb->control |= MK_MESSAGE; | ||
3619 | } | ||
3620 | |||
3621 | if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { | ||
3622 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
3623 | int msg_bytes; | ||
3624 | uint8_t tag_msgs[2]; | ||
3625 | |||
3626 | msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); | ||
3627 | if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { | ||
3628 | hscb->control |= tag_msgs[0]; | ||
3629 | if (tag_msgs[0] == MSG_ORDERED_TASK) | ||
3630 | dev->commands_since_idle_or_otag = 0; | ||
3631 | } else | ||
3632 | #endif | ||
3633 | if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH | ||
3634 | && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { | ||
3635 | hscb->control |= MSG_ORDERED_TASK; | ||
3636 | dev->commands_since_idle_or_otag = 0; | ||
3637 | } else { | ||
3638 | hscb->control |= MSG_SIMPLE_TASK; | ||
3639 | } | ||
3640 | } | ||
3641 | |||
3642 | hscb->cdb_len = cmd->cmd_len; | ||
3643 | if (hscb->cdb_len <= 12) { | ||
3644 | memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); | ||
3645 | } else { | ||
3646 | memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); | ||
3647 | scb->flags |= SCB_CDB32_PTR; | ||
3648 | } | ||
3649 | |||
3650 | scb->platform_data->xfer_len = 0; | ||
3651 | ahc_set_residual(scb, 0); | ||
3652 | ahc_set_sense_residual(scb, 0); | ||
3653 | scb->sg_count = 0; | ||
3654 | if (cmd->use_sg != 0) { | ||
3655 | struct ahc_dma_seg *sg; | ||
3656 | struct scatterlist *cur_seg; | ||
3657 | struct scatterlist *end_seg; | ||
3658 | int nseg; | ||
3659 | |||
3660 | cur_seg = (struct scatterlist *)cmd->request_buffer; | ||
3661 | nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg, | ||
3662 | scsi_to_pci_dma_dir(cmd->sc_data_direction)); | ||
3663 | end_seg = cur_seg + nseg; | ||
3664 | /* Copy the segments into the SG list. */ | ||
3665 | sg = scb->sg_list; | ||
3666 | /* | ||
3667 | * The sg_count may be larger than nseg if | ||
3668 | * a transfer crosses a 32bit page. | ||
3669 | */ | ||
3670 | while (cur_seg < end_seg) { | ||
3671 | dma_addr_t addr; | ||
3672 | bus_size_t len; | ||
3673 | int consumed; | ||
3674 | |||
3675 | addr = sg_dma_address(cur_seg); | ||
3676 | len = sg_dma_len(cur_seg); | ||
3677 | consumed = ahc_linux_map_seg(ahc, scb, | ||
3678 | sg, addr, len); | ||
3679 | sg += consumed; | ||
3680 | scb->sg_count += consumed; | ||
3681 | cur_seg++; | ||
3682 | } | ||
3683 | sg--; | ||
3684 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); | ||
3685 | |||
3686 | /* | ||
3687 | * Reset the sg list pointer. | ||
3688 | */ | ||
3689 | scb->hscb->sgptr = | ||
3690 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); | ||
3691 | |||
3692 | /* | ||
3693 | * Copy the first SG into the "current" | ||
3694 | * data pointer area. | ||
3695 | */ | ||
3696 | scb->hscb->dataptr = scb->sg_list->addr; | ||
3697 | scb->hscb->datacnt = scb->sg_list->len; | ||
3698 | } else if (cmd->request_bufflen != 0) { | ||
3699 | struct ahc_dma_seg *sg; | ||
3700 | dma_addr_t addr; | ||
3701 | |||
3702 | sg = scb->sg_list; | ||
3703 | addr = pci_map_single(ahc->dev_softc, | ||
3704 | cmd->request_buffer, | ||
3705 | cmd->request_bufflen, | ||
3706 | scsi_to_pci_dma_dir(cmd->sc_data_direction)); | ||
3707 | scb->platform_data->buf_busaddr = addr; | ||
3708 | scb->sg_count = ahc_linux_map_seg(ahc, scb, | ||
3709 | sg, addr, | ||
3710 | cmd->request_bufflen); | ||
3711 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); | ||
3712 | |||
3713 | /* | ||
3714 | * Reset the sg list pointer. | ||
3715 | */ | ||
3716 | scb->hscb->sgptr = | ||
3717 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); | ||
3718 | |||
3719 | /* | ||
3720 | * Copy the first SG into the "current" | ||
3721 | * data pointer area. | ||
3722 | */ | ||
3723 | scb->hscb->dataptr = sg->addr; | ||
3724 | scb->hscb->datacnt = sg->len; | ||
3725 | } else { | ||
3726 | scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); | ||
3727 | scb->hscb->dataptr = 0; | ||
3728 | scb->hscb->datacnt = 0; | ||
3729 | scb->sg_count = 0; | ||
3730 | } | ||
3731 | |||
3732 | ahc_sync_sglist(ahc, scb, BUS_DMASYNC_PREWRITE); | ||
3733 | LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); | ||
3734 | dev->openings--; | ||
3735 | dev->active++; | ||
3736 | dev->commands_issued++; | ||
3737 | if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) | ||
3738 | dev->commands_since_idle_or_otag++; | ||
3739 | |||
3740 | /* | ||
3741 | * We only allow one untagged transaction | ||
3742 | * per target in the initiator role unless | ||
3743 | * we are storing a full busy target *lun* | ||
3744 | * table in SCB space. | ||
3745 | */ | ||
3746 | if ((scb->hscb->control & (TARGET_SCB|TAG_ENB)) == 0 | ||
3747 | && (ahc->features & AHC_SCB_BTT) == 0) { | ||
3748 | struct scb_tailq *untagged_q; | ||
3749 | int target_offset; | ||
3750 | |||
3751 | target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); | ||
3752 | untagged_q = &(ahc->untagged_queues[target_offset]); | ||
3753 | TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); | ||
3754 | scb->flags |= SCB_UNTAGGEDQ; | ||
3755 | if (TAILQ_FIRST(untagged_q) != scb) | ||
3756 | continue; | ||
3757 | } | ||
3758 | scb->flags |= SCB_ACTIVE; | ||
3759 | ahc_queue_scb(ahc, scb); | ||
3760 | } | ||
3761 | } | ||
3762 | |||
3763 | /* | ||
3764 | * SCSI controller interrupt handler. | ||
3765 | */ | ||
3766 | irqreturn_t | ||
3767 | ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs) | ||
3768 | { | ||
3769 | struct ahc_softc *ahc; | ||
3770 | u_long flags; | ||
3771 | int ours; | ||
3772 | |||
3773 | ahc = (struct ahc_softc *) dev_id; | ||
3774 | ahc_lock(ahc, &flags); | ||
3775 | ours = ahc_intr(ahc); | ||
3776 | if (ahc_linux_next_device_to_run(ahc) != NULL) | ||
3777 | ahc_schedule_runq(ahc); | ||
3778 | ahc_linux_run_complete_queue(ahc); | ||
3779 | ahc_unlock(ahc, &flags); | ||
3780 | return IRQ_RETVAL(ours); | ||
3781 | } | ||
3782 | |||
3783 | void | ||
3784 | ahc_platform_flushwork(struct ahc_softc *ahc) | ||
3785 | { | ||
3786 | |||
3787 | while (ahc_linux_run_complete_queue(ahc) != NULL) | ||
3788 | ; | ||
3789 | } | ||
3790 | |||
3791 | static struct ahc_linux_target* | ||
3792 | ahc_linux_alloc_target(struct ahc_softc *ahc, u_int channel, u_int target) | ||
3793 | { | ||
3794 | struct ahc_linux_target *targ; | ||
3795 | u_int target_offset; | ||
3796 | |||
3797 | target_offset = target; | ||
3798 | if (channel != 0) | ||
3799 | target_offset += 8; | ||
3800 | |||
3801 | targ = malloc(sizeof(*targ), M_DEVBUG, M_NOWAIT); | ||
3802 | if (targ == NULL) | ||
3803 | return (NULL); | ||
3804 | memset(targ, 0, sizeof(*targ)); | ||
3805 | targ->channel = channel; | ||
3806 | targ->target = target; | ||
3807 | targ->ahc = ahc; | ||
3808 | targ->flags = AHC_DV_REQUIRED; | ||
3809 | ahc->platform_data->targets[target_offset] = targ; | ||
3810 | return (targ); | ||
3811 | } | ||
3812 | |||
3813 | static void | ||
3814 | ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ) | ||
3815 | { | ||
3816 | struct ahc_devinfo devinfo; | ||
3817 | struct ahc_initiator_tinfo *tinfo; | ||
3818 | struct ahc_tmode_tstate *tstate; | ||
3819 | u_int our_id; | ||
3820 | u_int target_offset; | ||
3821 | char channel; | ||
3822 | |||
3823 | /* | ||
3824 | * Force a negotiation to async/narrow on any | ||
3825 | * future command to this device unless a bus | ||
3826 | * reset occurs between now and that command. | ||
3827 | */ | ||
3828 | channel = 'A' + targ->channel; | ||
3829 | our_id = ahc->our_id; | ||
3830 | target_offset = targ->target; | ||
3831 | if (targ->channel != 0) { | ||
3832 | target_offset += 8; | ||
3833 | our_id = ahc->our_id_b; | ||
3834 | } | ||
3835 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, | ||
3836 | targ->target, &tstate); | ||
3837 | ahc_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD, | ||
3838 | channel, ROLE_INITIATOR); | ||
3839 | ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, | ||
3840 | AHC_TRANS_GOAL, /*paused*/FALSE); | ||
3841 | ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, | ||
3842 | AHC_TRANS_GOAL, /*paused*/FALSE); | ||
3843 | ahc_update_neg_request(ahc, &devinfo, tstate, tinfo, AHC_NEG_ALWAYS); | ||
3844 | ahc->platform_data->targets[target_offset] = NULL; | ||
3845 | if (targ->inq_data != NULL) | ||
3846 | free(targ->inq_data, M_DEVBUF); | ||
3847 | if (targ->dv_buffer != NULL) | ||
3848 | free(targ->dv_buffer, M_DEVBUF); | ||
3849 | if (targ->dv_buffer1 != NULL) | ||
3850 | free(targ->dv_buffer1, M_DEVBUF); | ||
3851 | free(targ, M_DEVBUF); | ||
3852 | } | ||
3853 | |||
3854 | static struct ahc_linux_device* | ||
3855 | ahc_linux_alloc_device(struct ahc_softc *ahc, | ||
3856 | struct ahc_linux_target *targ, u_int lun) | ||
3857 | { | ||
3858 | struct ahc_linux_device *dev; | ||
3859 | |||
3860 | dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT); | ||
3861 | if (dev == NULL) | ||
3862 | return (NULL); | ||
3863 | memset(dev, 0, sizeof(*dev)); | ||
3864 | init_timer(&dev->timer); | ||
3865 | TAILQ_INIT(&dev->busyq); | ||
3866 | dev->flags = AHC_DEV_UNCONFIGURED; | ||
3867 | dev->lun = lun; | ||
3868 | dev->target = targ; | ||
3869 | |||
3870 | /* | ||
3871 | * We start out life using untagged | ||
3872 | * transactions of which we allow one. | ||
3873 | */ | ||
3874 | dev->openings = 1; | ||
3875 | |||
3876 | /* | ||
3877 | * Set maxtags to 0. This will be changed if we | ||
3878 | * later determine that we are dealing with | ||
3879 | * a tagged queuing capable device. | ||
3880 | */ | ||
3881 | dev->maxtags = 0; | ||
3882 | |||
3883 | targ->refcount++; | ||
3884 | targ->devices[lun] = dev; | ||
3885 | return (dev); | ||
3886 | } | ||
3887 | |||
3888 | static void | ||
3889 | __ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev) | ||
3890 | { | ||
3891 | struct ahc_linux_target *targ; | ||
3892 | |||
3893 | targ = dev->target; | ||
3894 | targ->devices[dev->lun] = NULL; | ||
3895 | free(dev, M_DEVBUF); | ||
3896 | targ->refcount--; | ||
3897 | if (targ->refcount == 0 | ||
3898 | && (targ->flags & AHC_DV_REQUIRED) == 0) | ||
3899 | ahc_linux_free_target(ahc, targ); | ||
3900 | } | ||
3901 | |||
3902 | static void | ||
3903 | ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev) | ||
3904 | { | ||
3905 | del_timer_sync(&dev->timer); | ||
3906 | __ahc_linux_free_device(ahc, dev); | ||
3907 | } | ||
3908 | |||
3909 | void | ||
3910 | ahc_send_async(struct ahc_softc *ahc, char channel, | ||
3911 | u_int target, u_int lun, ac_code code, void *arg) | ||
3912 | { | ||
3913 | switch (code) { | ||
3914 | case AC_TRANSFER_NEG: | ||
3915 | { | ||
3916 | char buf[80]; | ||
3917 | struct ahc_linux_target *targ; | ||
3918 | struct info_str info; | ||
3919 | struct ahc_initiator_tinfo *tinfo; | ||
3920 | struct ahc_tmode_tstate *tstate; | ||
3921 | int target_offset; | ||
3922 | |||
3923 | info.buffer = buf; | ||
3924 | info.length = sizeof(buf); | ||
3925 | info.offset = 0; | ||
3926 | info.pos = 0; | ||
3927 | tinfo = ahc_fetch_transinfo(ahc, channel, | ||
3928 | channel == 'A' ? ahc->our_id | ||
3929 | : ahc->our_id_b, | ||
3930 | target, &tstate); | ||
3931 | |||
3932 | /* | ||
3933 | * Don't bother reporting results while | ||
3934 | * negotiations are still pending. | ||
3935 | */ | ||
3936 | if (tinfo->curr.period != tinfo->goal.period | ||
3937 | || tinfo->curr.width != tinfo->goal.width | ||
3938 | || tinfo->curr.offset != tinfo->goal.offset | ||
3939 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options) | ||
3940 | if (bootverbose == 0) | ||
3941 | break; | ||
3942 | |||
3943 | /* | ||
3944 | * Don't bother reporting results that | ||
3945 | * are identical to those last reported. | ||
3946 | */ | ||
3947 | target_offset = target; | ||
3948 | if (channel == 'B') | ||
3949 | target_offset += 8; | ||
3950 | targ = ahc->platform_data->targets[target_offset]; | ||
3951 | if (targ == NULL) | ||
3952 | break; | ||
3953 | if (tinfo->curr.period == targ->last_tinfo.period | ||
3954 | && tinfo->curr.width == targ->last_tinfo.width | ||
3955 | && tinfo->curr.offset == targ->last_tinfo.offset | ||
3956 | && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options) | ||
3957 | if (bootverbose == 0) | ||
3958 | break; | ||
3959 | |||
3960 | targ->last_tinfo.period = tinfo->curr.period; | ||
3961 | targ->last_tinfo.width = tinfo->curr.width; | ||
3962 | targ->last_tinfo.offset = tinfo->curr.offset; | ||
3963 | targ->last_tinfo.ppr_options = tinfo->curr.ppr_options; | ||
3964 | |||
3965 | printf("(%s:%c:", ahc_name(ahc), channel); | ||
3966 | if (target == CAM_TARGET_WILDCARD) | ||
3967 | printf("*): "); | ||
3968 | else | ||
3969 | printf("%d): ", target); | ||
3970 | ahc_format_transinfo(&info, &tinfo->curr); | ||
3971 | if (info.pos < info.length) | ||
3972 | *info.buffer = '\0'; | ||
3973 | else | ||
3974 | buf[info.length - 1] = '\0'; | ||
3975 | printf("%s", buf); | ||
3976 | break; | ||
3977 | } | ||
3978 | case AC_SENT_BDR: | ||
3979 | { | ||
3980 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
3981 | WARN_ON(lun != CAM_LUN_WILDCARD); | ||
3982 | scsi_report_device_reset(ahc->platform_data->host, | ||
3983 | channel - 'A', target); | ||
3984 | #else | ||
3985 | Scsi_Device *scsi_dev; | ||
3986 | |||
3987 | /* | ||
3988 | * Find the SCSI device associated with this | ||
3989 | * request and indicate that a UA is expected. | ||
3990 | */ | ||
3991 | for (scsi_dev = ahc->platform_data->host->host_queue; | ||
3992 | scsi_dev != NULL; scsi_dev = scsi_dev->next) { | ||
3993 | if (channel - 'A' == scsi_dev->channel | ||
3994 | && target == scsi_dev->id | ||
3995 | && (lun == CAM_LUN_WILDCARD | ||
3996 | || lun == scsi_dev->lun)) { | ||
3997 | scsi_dev->was_reset = 1; | ||
3998 | scsi_dev->expecting_cc_ua = 1; | ||
3999 | } | ||
4000 | } | ||
4001 | #endif | ||
4002 | break; | ||
4003 | } | ||
4004 | case AC_BUS_RESET: | ||
4005 | if (ahc->platform_data->host != NULL) { | ||
4006 | scsi_report_bus_reset(ahc->platform_data->host, | ||
4007 | channel - 'A'); | ||
4008 | } | ||
4009 | break; | ||
4010 | default: | ||
4011 | panic("ahc_send_async: Unexpected async event"); | ||
4012 | } | ||
4013 | } | ||
4014 | |||
4015 | /* | ||
4016 | * Calls the higher level scsi done function and frees the scb. | ||
4017 | */ | ||
4018 | void | ||
4019 | ahc_done(struct ahc_softc *ahc, struct scb *scb) | ||
4020 | { | ||
4021 | Scsi_Cmnd *cmd; | ||
4022 | struct ahc_linux_device *dev; | ||
4023 | |||
4024 | LIST_REMOVE(scb, pending_links); | ||
4025 | if ((scb->flags & SCB_UNTAGGEDQ) != 0) { | ||
4026 | struct scb_tailq *untagged_q; | ||
4027 | int target_offset; | ||
4028 | |||
4029 | target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); | ||
4030 | untagged_q = &(ahc->untagged_queues[target_offset]); | ||
4031 | TAILQ_REMOVE(untagged_q, scb, links.tqe); | ||
4032 | ahc_run_untagged_queue(ahc, untagged_q); | ||
4033 | } | ||
4034 | |||
4035 | if ((scb->flags & SCB_ACTIVE) == 0) { | ||
4036 | printf("SCB %d done'd twice\n", scb->hscb->tag); | ||
4037 | ahc_dump_card_state(ahc); | ||
4038 | panic("Stopping for safety"); | ||
4039 | } | ||
4040 | cmd = scb->io_ctx; | ||
4041 | dev = scb->platform_data->dev; | ||
4042 | dev->active--; | ||
4043 | dev->openings++; | ||
4044 | if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { | ||
4045 | cmd->result &= ~(CAM_DEV_QFRZN << 16); | ||
4046 | dev->qfrozen--; | ||
4047 | } | ||
4048 | ahc_linux_unmap_scb(ahc, scb); | ||
4049 | |||
4050 | /* | ||
4051 | * Guard against stale sense data. | ||
4052 | * The Linux mid-layer assumes that sense | ||
4053 | * was retrieved anytime the first byte of | ||
4054 | * the sense buffer looks "sane". | ||
4055 | */ | ||
4056 | cmd->sense_buffer[0] = 0; | ||
4057 | if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { | ||
4058 | uint32_t amount_xferred; | ||
4059 | |||
4060 | amount_xferred = | ||
4061 | ahc_get_transfer_length(scb) - ahc_get_residual(scb); | ||
4062 | if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { | ||
4063 | #ifdef AHC_DEBUG | ||
4064 | if ((ahc_debug & AHC_SHOW_MISC) != 0) { | ||
4065 | ahc_print_path(ahc, scb); | ||
4066 | printf("Set CAM_UNCOR_PARITY\n"); | ||
4067 | } | ||
4068 | #endif | ||
4069 | ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); | ||
4070 | #ifdef AHC_REPORT_UNDERFLOWS | ||
4071 | /* | ||
4072 | * This code is disabled by default as some | ||
4073 | * clients of the SCSI system do not properly | ||
4074 | * initialize the underflow parameter. This | ||
4075 | * results in spurious termination of commands | ||
4076 | * that complete as expected (e.g. underflow is | ||
4077 | * allowed as command can return variable amounts | ||
4078 | * of data. | ||
4079 | */ | ||
4080 | } else if (amount_xferred < scb->io_ctx->underflow) { | ||
4081 | u_int i; | ||
4082 | |||
4083 | ahc_print_path(ahc, scb); | ||
4084 | printf("CDB:"); | ||
4085 | for (i = 0; i < scb->io_ctx->cmd_len; i++) | ||
4086 | printf(" 0x%x", scb->io_ctx->cmnd[i]); | ||
4087 | printf("\n"); | ||
4088 | ahc_print_path(ahc, scb); | ||
4089 | printf("Saw underflow (%ld of %ld bytes). " | ||
4090 | "Treated as error\n", | ||
4091 | ahc_get_residual(scb), | ||
4092 | ahc_get_transfer_length(scb)); | ||
4093 | ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); | ||
4094 | #endif | ||
4095 | } else { | ||
4096 | ahc_set_transaction_status(scb, CAM_REQ_CMP); | ||
4097 | } | ||
4098 | } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { | ||
4099 | ahc_linux_handle_scsi_status(ahc, dev, scb); | ||
4100 | } else if (ahc_get_transaction_status(scb) == CAM_SEL_TIMEOUT) { | ||
4101 | dev->flags |= AHC_DEV_UNCONFIGURED; | ||
4102 | if (AHC_DV_CMD(cmd) == FALSE) | ||
4103 | dev->target->flags &= ~AHC_DV_REQUIRED; | ||
4104 | } | ||
4105 | /* | ||
4106 | * Start DV for devices that require it assuming the first command | ||
4107 | * sent does not result in a selection timeout. | ||
4108 | */ | ||
4109 | if (ahc_get_transaction_status(scb) != CAM_SEL_TIMEOUT | ||
4110 | && (dev->target->flags & AHC_DV_REQUIRED) != 0) | ||
4111 | ahc_linux_start_dv(ahc); | ||
4112 | |||
4113 | if (dev->openings == 1 | ||
4114 | && ahc_get_transaction_status(scb) == CAM_REQ_CMP | ||
4115 | && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) | ||
4116 | dev->tag_success_count++; | ||
4117 | /* | ||
4118 | * Some devices deal with temporary internal resource | ||
4119 | * shortages by returning queue full. When the queue | ||
4120 | * full occurrs, we throttle back. Slowly try to get | ||
4121 | * back to our previous queue depth. | ||
4122 | */ | ||
4123 | if ((dev->openings + dev->active) < dev->maxtags | ||
4124 | && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { | ||
4125 | dev->tag_success_count = 0; | ||
4126 | dev->openings++; | ||
4127 | } | ||
4128 | |||
4129 | if (dev->active == 0) | ||
4130 | dev->commands_since_idle_or_otag = 0; | ||
4131 | |||
4132 | if (TAILQ_EMPTY(&dev->busyq)) { | ||
4133 | if ((dev->flags & AHC_DEV_UNCONFIGURED) != 0 | ||
4134 | && dev->active == 0 | ||
4135 | && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0) | ||
4136 | ahc_linux_free_device(ahc, dev); | ||
4137 | } else if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) { | ||
4138 | TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links); | ||
4139 | dev->flags |= AHC_DEV_ON_RUN_LIST; | ||
4140 | } | ||
4141 | |||
4142 | if ((scb->flags & SCB_RECOVERY_SCB) != 0) { | ||
4143 | printf("Recovery SCB completes\n"); | ||
4144 | if (ahc_get_transaction_status(scb) == CAM_BDR_SENT | ||
4145 | || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) | ||
4146 | ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); | ||
4147 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { | ||
4148 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; | ||
4149 | up(&ahc->platform_data->eh_sem); | ||
4150 | } | ||
4151 | } | ||
4152 | |||
4153 | ahc_free_scb(ahc, scb); | ||
4154 | ahc_linux_queue_cmd_complete(ahc, cmd); | ||
4155 | |||
4156 | if ((ahc->platform_data->flags & AHC_DV_WAIT_SIMQ_EMPTY) != 0 | ||
4157 | && LIST_FIRST(&ahc->pending_scbs) == NULL) { | ||
4158 | ahc->platform_data->flags &= ~AHC_DV_WAIT_SIMQ_EMPTY; | ||
4159 | up(&ahc->platform_data->dv_sem); | ||
4160 | } | ||
4161 | |||
4162 | } | ||
4163 | |||
4164 | static void | ||
4165 | ahc_linux_handle_scsi_status(struct ahc_softc *ahc, | ||
4166 | struct ahc_linux_device *dev, struct scb *scb) | ||
4167 | { | ||
4168 | struct ahc_devinfo devinfo; | ||
4169 | |||
4170 | ahc_compile_devinfo(&devinfo, | ||
4171 | ahc->our_id, | ||
4172 | dev->target->target, dev->lun, | ||
4173 | dev->target->channel == 0 ? 'A' : 'B', | ||
4174 | ROLE_INITIATOR); | ||
4175 | |||
4176 | /* | ||
4177 | * We don't currently trust the mid-layer to | ||
4178 | * properly deal with queue full or busy. So, | ||
4179 | * when one occurs, we tell the mid-layer to | ||
4180 | * unconditionally requeue the command to us | ||
4181 | * so that we can retry it ourselves. We also | ||
4182 | * implement our own throttling mechanism so | ||
4183 | * we don't clobber the device with too many | ||
4184 | * commands. | ||
4185 | */ | ||
4186 | switch (ahc_get_scsi_status(scb)) { | ||
4187 | default: | ||
4188 | break; | ||
4189 | case SCSI_STATUS_CHECK_COND: | ||
4190 | case SCSI_STATUS_CMD_TERMINATED: | ||
4191 | { | ||
4192 | Scsi_Cmnd *cmd; | ||
4193 | |||
4194 | /* | ||
4195 | * Copy sense information to the OS's cmd | ||
4196 | * structure if it is available. | ||
4197 | */ | ||
4198 | cmd = scb->io_ctx; | ||
4199 | if (scb->flags & SCB_SENSE) { | ||
4200 | u_int sense_size; | ||
4201 | |||
4202 | sense_size = MIN(sizeof(struct scsi_sense_data) | ||
4203 | - ahc_get_sense_residual(scb), | ||
4204 | sizeof(cmd->sense_buffer)); | ||
4205 | memcpy(cmd->sense_buffer, | ||
4206 | ahc_get_sense_buf(ahc, scb), sense_size); | ||
4207 | if (sense_size < sizeof(cmd->sense_buffer)) | ||
4208 | memset(&cmd->sense_buffer[sense_size], 0, | ||
4209 | sizeof(cmd->sense_buffer) - sense_size); | ||
4210 | cmd->result |= (DRIVER_SENSE << 24); | ||
4211 | #ifdef AHC_DEBUG | ||
4212 | if (ahc_debug & AHC_SHOW_SENSE) { | ||
4213 | int i; | ||
4214 | |||
4215 | printf("Copied %d bytes of sense data:", | ||
4216 | sense_size); | ||
4217 | for (i = 0; i < sense_size; i++) { | ||
4218 | if ((i & 0xF) == 0) | ||
4219 | printf("\n"); | ||
4220 | printf("0x%x ", cmd->sense_buffer[i]); | ||
4221 | } | ||
4222 | printf("\n"); | ||
4223 | } | ||
4224 | #endif | ||
4225 | } | ||
4226 | break; | ||
4227 | } | ||
4228 | case SCSI_STATUS_QUEUE_FULL: | ||
4229 | { | ||
4230 | /* | ||
4231 | * By the time the core driver has returned this | ||
4232 | * command, all other commands that were queued | ||
4233 | * to us but not the device have been returned. | ||
4234 | * This ensures that dev->active is equal to | ||
4235 | * the number of commands actually queued to | ||
4236 | * the device. | ||
4237 | */ | ||
4238 | dev->tag_success_count = 0; | ||
4239 | if (dev->active != 0) { | ||
4240 | /* | ||
4241 | * Drop our opening count to the number | ||
4242 | * of commands currently outstanding. | ||
4243 | */ | ||
4244 | dev->openings = 0; | ||
4245 | /* | ||
4246 | ahc_print_path(ahc, scb); | ||
4247 | printf("Dropping tag count to %d\n", dev->active); | ||
4248 | */ | ||
4249 | if (dev->active == dev->tags_on_last_queuefull) { | ||
4250 | |||
4251 | dev->last_queuefull_same_count++; | ||
4252 | /* | ||
4253 | * If we repeatedly see a queue full | ||
4254 | * at the same queue depth, this | ||
4255 | * device has a fixed number of tag | ||
4256 | * slots. Lock in this tag depth | ||
4257 | * so we stop seeing queue fulls from | ||
4258 | * this device. | ||
4259 | */ | ||
4260 | if (dev->last_queuefull_same_count | ||
4261 | == AHC_LOCK_TAGS_COUNT) { | ||
4262 | dev->maxtags = dev->active; | ||
4263 | ahc_print_path(ahc, scb); | ||
4264 | printf("Locking max tag count at %d\n", | ||
4265 | dev->active); | ||
4266 | } | ||
4267 | } else { | ||
4268 | dev->tags_on_last_queuefull = dev->active; | ||
4269 | dev->last_queuefull_same_count = 0; | ||
4270 | } | ||
4271 | ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); | ||
4272 | ahc_set_scsi_status(scb, SCSI_STATUS_OK); | ||
4273 | ahc_platform_set_tags(ahc, &devinfo, | ||
4274 | (dev->flags & AHC_DEV_Q_BASIC) | ||
4275 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | ||
4276 | break; | ||
4277 | } | ||
4278 | /* | ||
4279 | * Drop down to a single opening, and treat this | ||
4280 | * as if the target returned BUSY SCSI status. | ||
4281 | */ | ||
4282 | dev->openings = 1; | ||
4283 | ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); | ||
4284 | ahc_platform_set_tags(ahc, &devinfo, | ||
4285 | (dev->flags & AHC_DEV_Q_BASIC) | ||
4286 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | ||
4287 | /* FALLTHROUGH */ | ||
4288 | } | ||
4289 | case SCSI_STATUS_BUSY: | ||
4290 | { | ||
4291 | /* | ||
4292 | * Set a short timer to defer sending commands for | ||
4293 | * a bit since Linux will not delay in this case. | ||
4294 | */ | ||
4295 | if ((dev->flags & AHC_DEV_TIMER_ACTIVE) != 0) { | ||
4296 | printf("%s:%c:%d: Device Timer still active during " | ||
4297 | "busy processing\n", ahc_name(ahc), | ||
4298 | dev->target->channel, dev->target->target); | ||
4299 | break; | ||
4300 | } | ||
4301 | dev->flags |= AHC_DEV_TIMER_ACTIVE; | ||
4302 | dev->qfrozen++; | ||
4303 | init_timer(&dev->timer); | ||
4304 | dev->timer.data = (u_long)dev; | ||
4305 | dev->timer.expires = jiffies + (HZ/2); | ||
4306 | dev->timer.function = ahc_linux_dev_timed_unfreeze; | ||
4307 | add_timer(&dev->timer); | ||
4308 | break; | ||
4309 | } | ||
4310 | } | ||
4311 | } | ||
4312 | |||
4313 | static void | ||
4314 | ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd) | ||
4315 | { | ||
4316 | /* | ||
4317 | * Typically, the complete queue has very few entries | ||
4318 | * queued to it before the queue is emptied by | ||
4319 | * ahc_linux_run_complete_queue, so sorting the entries | ||
4320 | * by generation number should be inexpensive. | ||
4321 | * We perform the sort so that commands that complete | ||
4322 | * with an error are retuned in the order origionally | ||
4323 | * queued to the controller so that any subsequent retries | ||
4324 | * are performed in order. The underlying ahc routines do | ||
4325 | * not guarantee the order that aborted commands will be | ||
4326 | * returned to us. | ||
4327 | */ | ||
4328 | struct ahc_completeq *completeq; | ||
4329 | struct ahc_cmd *list_cmd; | ||
4330 | struct ahc_cmd *acmd; | ||
4331 | |||
4332 | /* | ||
4333 | * Map CAM error codes into Linux Error codes. We | ||
4334 | * avoid the conversion so that the DV code has the | ||
4335 | * full error information available when making | ||
4336 | * state change decisions. | ||
4337 | */ | ||
4338 | if (AHC_DV_CMD(cmd) == FALSE) { | ||
4339 | u_int new_status; | ||
4340 | |||
4341 | switch (ahc_cmd_get_transaction_status(cmd)) { | ||
4342 | case CAM_REQ_INPROG: | ||
4343 | case CAM_REQ_CMP: | ||
4344 | case CAM_SCSI_STATUS_ERROR: | ||
4345 | new_status = DID_OK; | ||
4346 | break; | ||
4347 | case CAM_REQ_ABORTED: | ||
4348 | new_status = DID_ABORT; | ||
4349 | break; | ||
4350 | case CAM_BUSY: | ||
4351 | new_status = DID_BUS_BUSY; | ||
4352 | break; | ||
4353 | case CAM_REQ_INVALID: | ||
4354 | case CAM_PATH_INVALID: | ||
4355 | new_status = DID_BAD_TARGET; | ||
4356 | break; | ||
4357 | case CAM_SEL_TIMEOUT: | ||
4358 | new_status = DID_NO_CONNECT; | ||
4359 | break; | ||
4360 | case CAM_SCSI_BUS_RESET: | ||
4361 | case CAM_BDR_SENT: | ||
4362 | new_status = DID_RESET; | ||
4363 | break; | ||
4364 | case CAM_UNCOR_PARITY: | ||
4365 | new_status = DID_PARITY; | ||
4366 | break; | ||
4367 | case CAM_CMD_TIMEOUT: | ||
4368 | new_status = DID_TIME_OUT; | ||
4369 | break; | ||
4370 | case CAM_UA_ABORT: | ||
4371 | case CAM_REQ_CMP_ERR: | ||
4372 | case CAM_AUTOSENSE_FAIL: | ||
4373 | case CAM_NO_HBA: | ||
4374 | case CAM_DATA_RUN_ERR: | ||
4375 | case CAM_UNEXP_BUSFREE: | ||
4376 | case CAM_SEQUENCE_FAIL: | ||
4377 | case CAM_CCB_LEN_ERR: | ||
4378 | case CAM_PROVIDE_FAIL: | ||
4379 | case CAM_REQ_TERMIO: | ||
4380 | case CAM_UNREC_HBA_ERROR: | ||
4381 | case CAM_REQ_TOO_BIG: | ||
4382 | new_status = DID_ERROR; | ||
4383 | break; | ||
4384 | case CAM_REQUEUE_REQ: | ||
4385 | /* | ||
4386 | * If we want the request requeued, make sure there | ||
4387 | * are sufficent retries. In the old scsi error code, | ||
4388 | * we used to be able to specify a result code that | ||
4389 | * bypassed the retry count. Now we must use this | ||
4390 | * hack. We also "fake" a check condition with | ||
4391 | * a sense code of ABORTED COMMAND. This seems to | ||
4392 | * evoke a retry even if this command is being sent | ||
4393 | * via the eh thread. Ick! Ick! Ick! | ||
4394 | */ | ||
4395 | if (cmd->retries > 0) | ||
4396 | cmd->retries--; | ||
4397 | new_status = DID_OK; | ||
4398 | ahc_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND); | ||
4399 | cmd->result |= (DRIVER_SENSE << 24); | ||
4400 | memset(cmd->sense_buffer, 0, | ||
4401 | sizeof(cmd->sense_buffer)); | ||
4402 | cmd->sense_buffer[0] = SSD_ERRCODE_VALID | ||
4403 | | SSD_CURRENT_ERROR; | ||
4404 | cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND; | ||
4405 | break; | ||
4406 | default: | ||
4407 | /* We should never get here */ | ||
4408 | new_status = DID_ERROR; | ||
4409 | break; | ||
4410 | } | ||
4411 | |||
4412 | ahc_cmd_set_transaction_status(cmd, new_status); | ||
4413 | } | ||
4414 | |||
4415 | completeq = &ahc->platform_data->completeq; | ||
4416 | list_cmd = TAILQ_FIRST(completeq); | ||
4417 | acmd = (struct ahc_cmd *)cmd; | ||
4418 | while (list_cmd != NULL | ||
4419 | && acmd_scsi_cmd(list_cmd).serial_number | ||
4420 | < acmd_scsi_cmd(acmd).serial_number) | ||
4421 | list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe); | ||
4422 | if (list_cmd != NULL) | ||
4423 | TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe); | ||
4424 | else | ||
4425 | TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe); | ||
4426 | } | ||
4427 | |||
4428 | static void | ||
4429 | ahc_linux_filter_inquiry(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) | ||
4430 | { | ||
4431 | struct scsi_inquiry_data *sid; | ||
4432 | struct ahc_initiator_tinfo *tinfo; | ||
4433 | struct ahc_transinfo *user; | ||
4434 | struct ahc_transinfo *goal; | ||
4435 | struct ahc_transinfo *curr; | ||
4436 | struct ahc_tmode_tstate *tstate; | ||
4437 | struct ahc_syncrate *syncrate; | ||
4438 | struct ahc_linux_device *dev; | ||
4439 | u_int maxsync; | ||
4440 | u_int width; | ||
4441 | u_int period; | ||
4442 | u_int offset; | ||
4443 | u_int ppr_options; | ||
4444 | u_int trans_version; | ||
4445 | u_int prot_version; | ||
4446 | |||
4447 | /* | ||
4448 | * Determine if this lun actually exists. If so, | ||
4449 | * hold on to its corresponding device structure. | ||
4450 | * If not, make sure we release the device and | ||
4451 | * don't bother processing the rest of this inquiry | ||
4452 | * command. | ||
4453 | */ | ||
4454 | dev = ahc_linux_get_device(ahc, devinfo->channel - 'A', | ||
4455 | devinfo->target, devinfo->lun, | ||
4456 | /*alloc*/TRUE); | ||
4457 | |||
4458 | sid = (struct scsi_inquiry_data *)dev->target->inq_data; | ||
4459 | if (SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) { | ||
4460 | |||
4461 | dev->flags &= ~AHC_DEV_UNCONFIGURED; | ||
4462 | } else { | ||
4463 | dev->flags |= AHC_DEV_UNCONFIGURED; | ||
4464 | return; | ||
4465 | } | ||
4466 | |||
4467 | /* | ||
4468 | * Update our notion of this device's transfer | ||
4469 | * negotiation capabilities. | ||
4470 | */ | ||
4471 | tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, | ||
4472 | devinfo->our_scsiid, | ||
4473 | devinfo->target, &tstate); | ||
4474 | user = &tinfo->user; | ||
4475 | goal = &tinfo->goal; | ||
4476 | curr = &tinfo->curr; | ||
4477 | width = user->width; | ||
4478 | period = user->period; | ||
4479 | offset = user->offset; | ||
4480 | ppr_options = user->ppr_options; | ||
4481 | trans_version = user->transport_version; | ||
4482 | prot_version = MIN(user->protocol_version, SID_ANSI_REV(sid)); | ||
4483 | |||
4484 | /* | ||
4485 | * Only attempt SPI3/4 once we've verified that | ||
4486 | * the device claims to support SPI3/4 features. | ||
4487 | */ | ||
4488 | if (prot_version < SCSI_REV_2) | ||
4489 | trans_version = SID_ANSI_REV(sid); | ||
4490 | else | ||
4491 | trans_version = SCSI_REV_2; | ||
4492 | |||
4493 | if ((sid->flags & SID_WBus16) == 0) | ||
4494 | width = MSG_EXT_WDTR_BUS_8_BIT; | ||
4495 | if ((sid->flags & SID_Sync) == 0) { | ||
4496 | period = 0; | ||
4497 | offset = 0; | ||
4498 | ppr_options = 0; | ||
4499 | } | ||
4500 | if ((sid->spi3data & SID_SPI_QAS) == 0) | ||
4501 | ppr_options &= ~MSG_EXT_PPR_QAS_REQ; | ||
4502 | if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0) | ||
4503 | ppr_options &= MSG_EXT_PPR_QAS_REQ; | ||
4504 | if ((sid->spi3data & SID_SPI_IUS) == 0) | ||
4505 | ppr_options &= (MSG_EXT_PPR_DT_REQ | ||
4506 | | MSG_EXT_PPR_QAS_REQ); | ||
4507 | |||
4508 | if (prot_version > SCSI_REV_2 | ||
4509 | && ppr_options != 0) | ||
4510 | trans_version = user->transport_version; | ||
4511 | |||
4512 | ahc_validate_width(ahc, /*tinfo limit*/NULL, &width, ROLE_UNKNOWN); | ||
4513 | if ((ahc->features & AHC_ULTRA2) != 0) | ||
4514 | maxsync = AHC_SYNCRATE_DT; | ||
4515 | else if ((ahc->features & AHC_ULTRA) != 0) | ||
4516 | maxsync = AHC_SYNCRATE_ULTRA; | ||
4517 | else | ||
4518 | maxsync = AHC_SYNCRATE_FAST; | ||
4519 | |||
4520 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, maxsync); | ||
4521 | ahc_validate_offset(ahc, /*tinfo limit*/NULL, syncrate, | ||
4522 | &offset, width, ROLE_UNKNOWN); | ||
4523 | if (offset == 0 || period == 0) { | ||
4524 | period = 0; | ||
4525 | offset = 0; | ||
4526 | ppr_options = 0; | ||
4527 | } | ||
4528 | /* Apply our filtered user settings. */ | ||
4529 | curr->transport_version = trans_version; | ||
4530 | curr->protocol_version = prot_version; | ||
4531 | ahc_set_width(ahc, devinfo, width, AHC_TRANS_GOAL, /*paused*/FALSE); | ||
4532 | ahc_set_syncrate(ahc, devinfo, syncrate, period, | ||
4533 | offset, ppr_options, AHC_TRANS_GOAL, | ||
4534 | /*paused*/FALSE); | ||
4535 | } | ||
4536 | |||
4537 | static void | ||
4538 | ahc_linux_sem_timeout(u_long arg) | ||
4539 | { | ||
4540 | struct ahc_softc *ahc; | ||
4541 | u_long s; | ||
4542 | |||
4543 | ahc = (struct ahc_softc *)arg; | ||
4544 | |||
4545 | ahc_lock(ahc, &s); | ||
4546 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { | ||
4547 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; | ||
4548 | up(&ahc->platform_data->eh_sem); | ||
4549 | } | ||
4550 | ahc_unlock(ahc, &s); | ||
4551 | } | ||
4552 | |||
4553 | static void | ||
4554 | ahc_linux_freeze_simq(struct ahc_softc *ahc) | ||
4555 | { | ||
4556 | ahc->platform_data->qfrozen++; | ||
4557 | if (ahc->platform_data->qfrozen == 1) { | ||
4558 | scsi_block_requests(ahc->platform_data->host); | ||
4559 | |||
4560 | /* XXX What about Twin channels? */ | ||
4561 | ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, | ||
4562 | CAM_LUN_WILDCARD, SCB_LIST_NULL, | ||
4563 | ROLE_INITIATOR, CAM_REQUEUE_REQ); | ||
4564 | } | ||
4565 | } | ||
4566 | |||
4567 | static void | ||
4568 | ahc_linux_release_simq(u_long arg) | ||
4569 | { | ||
4570 | struct ahc_softc *ahc; | ||
4571 | u_long s; | ||
4572 | int unblock_reqs; | ||
4573 | |||
4574 | ahc = (struct ahc_softc *)arg; | ||
4575 | |||
4576 | unblock_reqs = 0; | ||
4577 | ahc_lock(ahc, &s); | ||
4578 | if (ahc->platform_data->qfrozen > 0) | ||
4579 | ahc->platform_data->qfrozen--; | ||
4580 | if (ahc->platform_data->qfrozen == 0) | ||
4581 | unblock_reqs = 1; | ||
4582 | if (AHC_DV_SIMQ_FROZEN(ahc) | ||
4583 | && ((ahc->platform_data->flags & AHC_DV_WAIT_SIMQ_RELEASE) != 0)) { | ||
4584 | ahc->platform_data->flags &= ~AHC_DV_WAIT_SIMQ_RELEASE; | ||
4585 | up(&ahc->platform_data->dv_sem); | ||
4586 | } | ||
4587 | ahc_schedule_runq(ahc); | ||
4588 | ahc_unlock(ahc, &s); | ||
4589 | /* | ||
4590 | * There is still a race here. The mid-layer | ||
4591 | * should keep its own freeze count and use | ||
4592 | * a bottom half handler to run the queues | ||
4593 | * so we can unblock with our own lock held. | ||
4594 | */ | ||
4595 | if (unblock_reqs) | ||
4596 | scsi_unblock_requests(ahc->platform_data->host); | ||
4597 | } | ||
4598 | |||
4599 | static void | ||
4600 | ahc_linux_dev_timed_unfreeze(u_long arg) | ||
4601 | { | ||
4602 | struct ahc_linux_device *dev; | ||
4603 | struct ahc_softc *ahc; | ||
4604 | u_long s; | ||
4605 | |||
4606 | dev = (struct ahc_linux_device *)arg; | ||
4607 | ahc = dev->target->ahc; | ||
4608 | ahc_lock(ahc, &s); | ||
4609 | dev->flags &= ~AHC_DEV_TIMER_ACTIVE; | ||
4610 | if (dev->qfrozen > 0) | ||
4611 | dev->qfrozen--; | ||
4612 | if (dev->qfrozen == 0 | ||
4613 | && (dev->flags & AHC_DEV_ON_RUN_LIST) == 0) | ||
4614 | ahc_linux_run_device_queue(ahc, dev); | ||
4615 | if (TAILQ_EMPTY(&dev->busyq) | ||
4616 | && dev->active == 0) | ||
4617 | __ahc_linux_free_device(ahc, dev); | ||
4618 | ahc_unlock(ahc, &s); | ||
4619 | } | ||
4620 | |||
4621 | static int | ||
4622 | ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag) | ||
4623 | { | ||
4624 | struct ahc_softc *ahc; | ||
4625 | struct ahc_cmd *acmd; | ||
4626 | struct ahc_cmd *list_acmd; | ||
4627 | struct ahc_linux_device *dev; | ||
4628 | struct scb *pending_scb; | ||
4629 | u_long s; | ||
4630 | u_int saved_scbptr; | ||
4631 | u_int active_scb_index; | ||
4632 | u_int last_phase; | ||
4633 | u_int saved_scsiid; | ||
4634 | u_int cdb_byte; | ||
4635 | int retval; | ||
4636 | int was_paused; | ||
4637 | int paused; | ||
4638 | int wait; | ||
4639 | int disconnected; | ||
4640 | |||
4641 | pending_scb = NULL; | ||
4642 | paused = FALSE; | ||
4643 | wait = FALSE; | ||
4644 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | ||
4645 | acmd = (struct ahc_cmd *)cmd; | ||
4646 | |||
4647 | printf("%s:%d:%d:%d: Attempting to queue a%s message\n", | ||
4648 | ahc_name(ahc), cmd->device->channel, | ||
4649 | cmd->device->id, cmd->device->lun, | ||
4650 | flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); | ||
4651 | |||
4652 | printf("CDB:"); | ||
4653 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) | ||
4654 | printf(" 0x%x", cmd->cmnd[cdb_byte]); | ||
4655 | printf("\n"); | ||
4656 | |||
4657 | /* | ||
4658 | * In all versions of Linux, we have to work around | ||
4659 | * a major flaw in how the mid-layer is locked down | ||
4660 | * if we are to sleep successfully in our error handler | ||
4661 | * while allowing our interrupt handler to run. Since | ||
4662 | * the midlayer acquires either the io_request_lock or | ||
4663 | * our lock prior to calling us, we must use the | ||
4664 | * spin_unlock_irq() method for unlocking our lock. | ||
4665 | * This will force interrupts to be enabled on the | ||
4666 | * current CPU. Since the EH thread should not have | ||
4667 | * been running with CPU interrupts disabled other than | ||
4668 | * by acquiring either the io_request_lock or our own | ||
4669 | * lock, this *should* be safe. | ||
4670 | */ | ||
4671 | ahc_midlayer_entrypoint_lock(ahc, &s); | ||
4672 | |||
4673 | /* | ||
4674 | * First determine if we currently own this command. | ||
4675 | * Start by searching the device queue. If not found | ||
4676 | * there, check the pending_scb list. If not found | ||
4677 | * at all, and the system wanted us to just abort the | ||
4678 | * command, return success. | ||
4679 | */ | ||
4680 | dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id, | ||
4681 | cmd->device->lun, /*alloc*/FALSE); | ||
4682 | |||
4683 | if (dev == NULL) { | ||
4684 | /* | ||
4685 | * No target device for this command exists, | ||
4686 | * so we must not still own the command. | ||
4687 | */ | ||
4688 | printf("%s:%d:%d:%d: Is not an active device\n", | ||
4689 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | ||
4690 | cmd->device->lun); | ||
4691 | retval = SUCCESS; | ||
4692 | goto no_cmd; | ||
4693 | } | ||
4694 | |||
4695 | TAILQ_FOREACH(list_acmd, &dev->busyq, acmd_links.tqe) { | ||
4696 | if (list_acmd == acmd) | ||
4697 | break; | ||
4698 | } | ||
4699 | |||
4700 | if (list_acmd != NULL) { | ||
4701 | printf("%s:%d:%d:%d: Command found on device queue\n", | ||
4702 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | ||
4703 | cmd->device->lun); | ||
4704 | if (flag == SCB_ABORT) { | ||
4705 | TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe); | ||
4706 | cmd->result = DID_ABORT << 16; | ||
4707 | ahc_linux_queue_cmd_complete(ahc, cmd); | ||
4708 | retval = SUCCESS; | ||
4709 | goto done; | ||
4710 | } | ||
4711 | } | ||
4712 | |||
4713 | if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 | ||
4714 | && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, | ||
4715 | cmd->device->channel + 'A', | ||
4716 | cmd->device->lun, | ||
4717 | CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { | ||
4718 | printf("%s:%d:%d:%d: Command found on untagged queue\n", | ||
4719 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | ||
4720 | cmd->device->lun); | ||
4721 | retval = SUCCESS; | ||
4722 | goto done; | ||
4723 | } | ||
4724 | |||
4725 | /* | ||
4726 | * See if we can find a matching cmd in the pending list. | ||
4727 | */ | ||
4728 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | ||
4729 | if (pending_scb->io_ctx == cmd) | ||
4730 | break; | ||
4731 | } | ||
4732 | |||
4733 | if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { | ||
4734 | |||
4735 | /* Any SCB for this device will do for a target reset */ | ||
4736 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | ||
4737 | if (ahc_match_scb(ahc, pending_scb, cmd->device->id, | ||
4738 | cmd->device->channel + 'A', | ||
4739 | CAM_LUN_WILDCARD, | ||
4740 | SCB_LIST_NULL, ROLE_INITIATOR) == 0) | ||
4741 | break; | ||
4742 | } | ||
4743 | } | ||
4744 | |||
4745 | if (pending_scb == NULL) { | ||
4746 | printf("%s:%d:%d:%d: Command not found\n", | ||
4747 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | ||
4748 | cmd->device->lun); | ||
4749 | goto no_cmd; | ||
4750 | } | ||
4751 | |||
4752 | if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { | ||
4753 | /* | ||
4754 | * We can't queue two recovery actions using the same SCB | ||
4755 | */ | ||
4756 | retval = FAILED; | ||
4757 | goto done; | ||
4758 | } | ||
4759 | |||
4760 | /* | ||
4761 | * Ensure that the card doesn't do anything | ||
4762 | * behind our back and that we didn't "just" miss | ||
4763 | * an interrupt that would affect this cmd. | ||
4764 | */ | ||
4765 | was_paused = ahc_is_paused(ahc); | ||
4766 | ahc_pause_and_flushwork(ahc); | ||
4767 | paused = TRUE; | ||
4768 | |||
4769 | if ((pending_scb->flags & SCB_ACTIVE) == 0) { | ||
4770 | printf("%s:%d:%d:%d: Command already completed\n", | ||
4771 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | ||
4772 | cmd->device->lun); | ||
4773 | goto no_cmd; | ||
4774 | } | ||
4775 | |||
4776 | printf("%s: At time of recovery, card was %spaused\n", | ||
4777 | ahc_name(ahc), was_paused ? "" : "not "); | ||
4778 | ahc_dump_card_state(ahc); | ||
4779 | |||
4780 | disconnected = TRUE; | ||
4781 | if (flag == SCB_ABORT) { | ||
4782 | if (ahc_search_qinfifo(ahc, cmd->device->id, | ||
4783 | cmd->device->channel + 'A', | ||
4784 | cmd->device->lun, | ||
4785 | pending_scb->hscb->tag, | ||
4786 | ROLE_INITIATOR, CAM_REQ_ABORTED, | ||
4787 | SEARCH_COMPLETE) > 0) { | ||
4788 | printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", | ||
4789 | ahc_name(ahc), cmd->device->channel, | ||
4790 | cmd->device->id, cmd->device->lun); | ||
4791 | retval = SUCCESS; | ||
4792 | goto done; | ||
4793 | } | ||
4794 | } else if (ahc_search_qinfifo(ahc, cmd->device->id, | ||
4795 | cmd->device->channel + 'A', | ||
4796 | cmd->device->lun, pending_scb->hscb->tag, | ||
4797 | ROLE_INITIATOR, /*status*/0, | ||
4798 | SEARCH_COUNT) > 0) { | ||
4799 | disconnected = FALSE; | ||
4800 | } | ||
4801 | |||
4802 | if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { | ||
4803 | struct scb *bus_scb; | ||
4804 | |||
4805 | bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); | ||
4806 | if (bus_scb == pending_scb) | ||
4807 | disconnected = FALSE; | ||
4808 | else if (flag != SCB_ABORT | ||
4809 | && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid | ||
4810 | && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) | ||
4811 | disconnected = FALSE; | ||
4812 | } | ||
4813 | |||
4814 | /* | ||
4815 | * At this point, pending_scb is the scb associated with the | ||
4816 | * passed in command. That command is currently active on the | ||
4817 | * bus, is in the disconnected state, or we're hoping to find | ||
4818 | * a command for the same target active on the bus to abuse to | ||
4819 | * send a BDR. Queue the appropriate message based on which of | ||
4820 | * these states we are in. | ||
4821 | */ | ||
4822 | last_phase = ahc_inb(ahc, LASTPHASE); | ||
4823 | saved_scbptr = ahc_inb(ahc, SCBPTR); | ||
4824 | active_scb_index = ahc_inb(ahc, SCB_TAG); | ||
4825 | saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); | ||
4826 | if (last_phase != P_BUSFREE | ||
4827 | && (pending_scb->hscb->tag == active_scb_index | ||
4828 | || (flag == SCB_DEVICE_RESET | ||
4829 | && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) { | ||
4830 | |||
4831 | /* | ||
4832 | * We're active on the bus, so assert ATN | ||
4833 | * and hope that the target responds. | ||
4834 | */ | ||
4835 | pending_scb = ahc_lookup_scb(ahc, active_scb_index); | ||
4836 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | ||
4837 | ahc_outb(ahc, MSG_OUT, HOST_MSG); | ||
4838 | ahc_outb(ahc, SCSISIGO, last_phase|ATNO); | ||
4839 | printf("%s:%d:%d:%d: Device is active, asserting ATN\n", | ||
4840 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | ||
4841 | cmd->device->lun); | ||
4842 | wait = TRUE; | ||
4843 | } else if (disconnected) { | ||
4844 | |||
4845 | /* | ||
4846 | * Actually re-queue this SCB in an attempt | ||
4847 | * to select the device before it reconnects. | ||
4848 | * In either case (selection or reselection), | ||
4849 | * we will now issue the approprate message | ||
4850 | * to the timed-out device. | ||
4851 | * | ||
4852 | * Set the MK_MESSAGE control bit indicating | ||
4853 | * that we desire to send a message. We | ||
4854 | * also set the disconnected flag since | ||
4855 | * in the paging case there is no guarantee | ||
4856 | * that our SCB control byte matches the | ||
4857 | * version on the card. We don't want the | ||
4858 | * sequencer to abort the command thinking | ||
4859 | * an unsolicited reselection occurred. | ||
4860 | */ | ||
4861 | pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; | ||
4862 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | ||
4863 | |||
4864 | /* | ||
4865 | * Remove any cached copy of this SCB in the | ||
4866 | * disconnected list in preparation for the | ||
4867 | * queuing of our abort SCB. We use the | ||
4868 | * same element in the SCB, SCB_NEXT, for | ||
4869 | * both the qinfifo and the disconnected list. | ||
4870 | */ | ||
4871 | ahc_search_disc_list(ahc, cmd->device->id, | ||
4872 | cmd->device->channel + 'A', | ||
4873 | cmd->device->lun, pending_scb->hscb->tag, | ||
4874 | /*stop_on_first*/TRUE, | ||
4875 | /*remove*/TRUE, | ||
4876 | /*save_state*/FALSE); | ||
4877 | |||
4878 | /* | ||
4879 | * In the non-paging case, the sequencer will | ||
4880 | * never re-reference the in-core SCB. | ||
4881 | * To make sure we are notified during | ||
4882 | * reslection, set the MK_MESSAGE flag in | ||
4883 | * the card's copy of the SCB. | ||
4884 | */ | ||
4885 | if ((ahc->flags & AHC_PAGESCBS) == 0) { | ||
4886 | ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); | ||
4887 | ahc_outb(ahc, SCB_CONTROL, | ||
4888 | ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); | ||
4889 | } | ||
4890 | |||
4891 | /* | ||
4892 | * Clear out any entries in the QINFIFO first | ||
4893 | * so we are the next SCB for this target | ||
4894 | * to run. | ||
4895 | */ | ||
4896 | ahc_search_qinfifo(ahc, cmd->device->id, | ||
4897 | cmd->device->channel + 'A', | ||
4898 | cmd->device->lun, SCB_LIST_NULL, | ||
4899 | ROLE_INITIATOR, CAM_REQUEUE_REQ, | ||
4900 | SEARCH_COMPLETE); | ||
4901 | ahc_qinfifo_requeue_tail(ahc, pending_scb); | ||
4902 | ahc_outb(ahc, SCBPTR, saved_scbptr); | ||
4903 | ahc_print_path(ahc, pending_scb); | ||
4904 | printf("Device is disconnected, re-queuing SCB\n"); | ||
4905 | wait = TRUE; | ||
4906 | } else { | ||
4907 | printf("%s:%d:%d:%d: Unable to deliver message\n", | ||
4908 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | ||
4909 | cmd->device->lun); | ||
4910 | retval = FAILED; | ||
4911 | goto done; | ||
4912 | } | ||
4913 | |||
4914 | no_cmd: | ||
4915 | /* | ||
4916 | * Our assumption is that if we don't have the command, no | ||
4917 | * recovery action was required, so we return success. Again, | ||
4918 | * the semantics of the mid-layer recovery engine are not | ||
4919 | * well defined, so this may change in time. | ||
4920 | */ | ||
4921 | retval = SUCCESS; | ||
4922 | done: | ||
4923 | if (paused) | ||
4924 | ahc_unpause(ahc); | ||
4925 | if (wait) { | ||
4926 | struct timer_list timer; | ||
4927 | int ret; | ||
4928 | |||
4929 | ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE; | ||
4930 | spin_unlock_irq(&ahc->platform_data->spin_lock); | ||
4931 | init_timer(&timer); | ||
4932 | timer.data = (u_long)ahc; | ||
4933 | timer.expires = jiffies + (5 * HZ); | ||
4934 | timer.function = ahc_linux_sem_timeout; | ||
4935 | add_timer(&timer); | ||
4936 | printf("Recovery code sleeping\n"); | ||
4937 | down(&ahc->platform_data->eh_sem); | ||
4938 | printf("Recovery code awake\n"); | ||
4939 | ret = del_timer_sync(&timer); | ||
4940 | if (ret == 0) { | ||
4941 | printf("Timer Expired\n"); | ||
4942 | retval = FAILED; | ||
4943 | } | ||
4944 | spin_lock_irq(&ahc->platform_data->spin_lock); | ||
4945 | } | ||
4946 | ahc_schedule_runq(ahc); | ||
4947 | ahc_linux_run_complete_queue(ahc); | ||
4948 | ahc_midlayer_entrypoint_unlock(ahc, &s); | ||
4949 | return (retval); | ||
4950 | } | ||
4951 | |||
4952 | void | ||
4953 | ahc_platform_dump_card_state(struct ahc_softc *ahc) | ||
4954 | { | ||
4955 | struct ahc_linux_device *dev; | ||
4956 | int channel; | ||
4957 | int maxchannel; | ||
4958 | int target; | ||
4959 | int maxtarget; | ||
4960 | int lun; | ||
4961 | int i; | ||
4962 | |||
4963 | maxchannel = (ahc->features & AHC_TWIN) ? 1 : 0; | ||
4964 | maxtarget = (ahc->features & AHC_WIDE) ? 15 : 7; | ||
4965 | for (channel = 0; channel <= maxchannel; channel++) { | ||
4966 | |||
4967 | for (target = 0; target <=maxtarget; target++) { | ||
4968 | |||
4969 | for (lun = 0; lun < AHC_NUM_LUNS; lun++) { | ||
4970 | struct ahc_cmd *acmd; | ||
4971 | |||
4972 | dev = ahc_linux_get_device(ahc, channel, target, | ||
4973 | lun, /*alloc*/FALSE); | ||
4974 | if (dev == NULL) | ||
4975 | continue; | ||
4976 | |||
4977 | printf("DevQ(%d:%d:%d): ", | ||
4978 | channel, target, lun); | ||
4979 | i = 0; | ||
4980 | TAILQ_FOREACH(acmd, &dev->busyq, | ||
4981 | acmd_links.tqe) { | ||
4982 | if (i++ > AHC_SCB_MAX) | ||
4983 | break; | ||
4984 | } | ||
4985 | printf("%d waiting\n", i); | ||
4986 | } | ||
4987 | } | ||
4988 | } | ||
4989 | } | ||
4990 | |||
4991 | static void ahc_linux_exit(void); | ||
4992 | |||
4993 | static int __init | ||
4994 | ahc_linux_init(void) | ||
4995 | { | ||
4996 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | ||
4997 | int rc = ahc_linux_detect(&aic7xxx_driver_template); | ||
4998 | if (rc) | ||
4999 | return rc; | ||
5000 | ahc_linux_exit(); | ||
5001 | return -ENODEV; | ||
5002 | #else | ||
5003 | scsi_register_module(MODULE_SCSI_HA, &aic7xxx_driver_template); | ||
5004 | if (aic7xxx_driver_template.present == 0) { | ||
5005 | scsi_unregister_module(MODULE_SCSI_HA, | ||
5006 | &aic7xxx_driver_template); | ||
5007 | return (-ENODEV); | ||
5008 | } | ||
5009 | |||
5010 | return (0); | ||
5011 | #endif | ||
5012 | } | ||
5013 | |||
5014 | static void | ||
5015 | ahc_linux_exit(void) | ||
5016 | { | ||
5017 | struct ahc_softc *ahc; | ||
5018 | |||
5019 | /* | ||
5020 | * Shutdown DV threads before going into the SCSI mid-layer. | ||
5021 | * This avoids situations where the mid-layer locks the entire | ||
5022 | * kernel so that waiting for our DV threads to exit leads | ||
5023 | * to deadlock. | ||
5024 | */ | ||
5025 | TAILQ_FOREACH(ahc, &ahc_tailq, links) { | ||
5026 | |||
5027 | ahc_linux_kill_dv_thread(ahc); | ||
5028 | } | ||
5029 | |||
5030 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | ||
5031 | /* | ||
5032 | * In 2.4 we have to unregister from the PCI core _after_ | ||
5033 | * unregistering from the scsi midlayer to avoid dangling | ||
5034 | * references. | ||
5035 | */ | ||
5036 | scsi_unregister_module(MODULE_SCSI_HA, &aic7xxx_driver_template); | ||
5037 | #endif | ||
5038 | ahc_linux_pci_exit(); | ||
5039 | ahc_linux_eisa_exit(); | ||
5040 | } | ||
5041 | |||
5042 | module_init(ahc_linux_init); | ||
5043 | module_exit(ahc_linux_exit); | ||