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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); |