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1da177e4 LT |
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> | |
92d161c3 JB |
125 | #include <scsi/scsi_transport.h> |
126 | #include <scsi/scsi_transport_spi.h> | |
127 | ||
128 | static struct scsi_transport_template *ahc_linux_transport_template = NULL; | |
1da177e4 LT |
129 | |
130 | /* | |
131 | * Include aiclib.c as part of our | |
132 | * "module dependencies are hard" work around. | |
133 | */ | |
134 | #include "aiclib.c" | |
135 | ||
136 | #include <linux/init.h> /* __setup */ | |
137 | ||
138 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
139 | #include "sd.h" /* For geometry detection */ | |
140 | #endif | |
141 | ||
142 | #include <linux/mm.h> /* For fetching system memory size */ | |
143 | #include <linux/blkdev.h> /* For block_size() */ | |
144 | #include <linux/delay.h> /* For ssleep/msleep */ | |
145 | ||
146 | /* | |
147 | * Lock protecting manipulation of the ahc softc list. | |
148 | */ | |
149 | spinlock_t ahc_list_spinlock; | |
150 | ||
151 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
152 | /* For dynamic sglist size calculation. */ | |
153 | u_int ahc_linux_nseg; | |
154 | #endif | |
155 | ||
156 | /* | |
157 | * Set this to the delay in seconds after SCSI bus reset. | |
158 | * Note, we honor this only for the initial bus reset. | |
159 | * The scsi error recovery code performs its own bus settle | |
160 | * delay handling for error recovery actions. | |
161 | */ | |
162 | #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS | |
163 | #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS | |
164 | #else | |
165 | #define AIC7XXX_RESET_DELAY 5000 | |
166 | #endif | |
167 | ||
168 | /* | |
169 | * Control collection of SCSI transfer statistics for the /proc filesystem. | |
170 | * | |
171 | * NOTE: Do NOT enable this when running on kernels version 1.2.x and below. | |
172 | * NOTE: This does affect performance since it has to maintain statistics. | |
173 | */ | |
174 | #ifdef CONFIG_AIC7XXX_PROC_STATS | |
175 | #define AIC7XXX_PROC_STATS | |
176 | #endif | |
177 | ||
178 | /* | |
179 | * To change the default number of tagged transactions allowed per-device, | |
180 | * add a line to the lilo.conf file like: | |
181 | * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" | |
182 | * which will result in the first four devices on the first two | |
183 | * controllers being set to a tagged queue depth of 32. | |
184 | * | |
185 | * The tag_commands is an array of 16 to allow for wide and twin adapters. | |
186 | * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 | |
187 | * for channel 1. | |
188 | */ | |
189 | typedef struct { | |
190 | uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ | |
191 | } adapter_tag_info_t; | |
192 | ||
193 | /* | |
194 | * Modify this as you see fit for your system. | |
195 | * | |
196 | * 0 tagged queuing disabled | |
197 | * 1 <= n <= 253 n == max tags ever dispatched. | |
198 | * | |
199 | * The driver will throttle the number of commands dispatched to a | |
200 | * device if it returns queue full. For devices with a fixed maximum | |
201 | * queue depth, the driver will eventually determine this depth and | |
202 | * lock it in (a console message is printed to indicate that a lock | |
203 | * has occurred). On some devices, queue full is returned for a temporary | |
204 | * resource shortage. These devices will return queue full at varying | |
205 | * depths. The driver will throttle back when the queue fulls occur and | |
206 | * attempt to slowly increase the depth over time as the device recovers | |
207 | * from the resource shortage. | |
208 | * | |
209 | * In this example, the first line will disable tagged queueing for all | |
210 | * the devices on the first probed aic7xxx adapter. | |
211 | * | |
212 | * The second line enables tagged queueing with 4 commands/LUN for IDs | |
213 | * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the | |
214 | * driver to attempt to use up to 64 tags for ID 1. | |
215 | * | |
216 | * The third line is the same as the first line. | |
217 | * | |
218 | * The fourth line disables tagged queueing for devices 0 and 3. It | |
219 | * enables tagged queueing for the other IDs, with 16 commands/LUN | |
220 | * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for | |
221 | * IDs 2, 5-7, and 9-15. | |
222 | */ | |
223 | ||
224 | /* | |
225 | * NOTE: The below structure is for reference only, the actual structure | |
226 | * to modify in order to change things is just below this comment block. | |
227 | adapter_tag_info_t aic7xxx_tag_info[] = | |
228 | { | |
229 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
230 | {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, | |
231 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
232 | {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} | |
233 | }; | |
234 | */ | |
235 | ||
236 | #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE | |
237 | #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE | |
238 | #else | |
239 | #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE | |
240 | #endif | |
241 | ||
242 | #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ | |
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 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
248 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
249 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
250 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ | |
251 | } | |
252 | ||
253 | /* | |
254 | * By default, use the number of commands specified by | |
255 | * the users kernel configuration. | |
256 | */ | |
257 | static adapter_tag_info_t aic7xxx_tag_info[] = | |
258 | { | |
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 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
272 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
273 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
274 | {AIC7XXX_CONFIGED_TAG_COMMANDS} | |
275 | }; | |
276 | ||
1da177e4 LT |
277 | /* |
278 | * There should be a specific return value for this in scsi.h, but | |
279 | * it seems that most drivers ignore it. | |
280 | */ | |
281 | #define DID_UNDERFLOW DID_ERROR | |
282 | ||
283 | void | |
284 | ahc_print_path(struct ahc_softc *ahc, struct scb *scb) | |
285 | { | |
286 | printk("(scsi%d:%c:%d:%d): ", | |
287 | ahc->platform_data->host->host_no, | |
288 | scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', | |
289 | scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, | |
290 | scb != NULL ? SCB_GET_LUN(scb) : -1); | |
291 | } | |
292 | ||
293 | /* | |
294 | * XXX - these options apply unilaterally to _all_ 274x/284x/294x | |
295 | * cards in the system. This should be fixed. Exceptions to this | |
296 | * rule are noted in the comments. | |
297 | */ | |
298 | ||
299 | /* | |
300 | * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This | |
301 | * has no effect on any later resets that might occur due to things like | |
302 | * SCSI bus timeouts. | |
303 | */ | |
304 | static uint32_t aic7xxx_no_reset; | |
305 | ||
306 | /* | |
307 | * Certain PCI motherboards will scan PCI devices from highest to lowest, | |
308 | * others scan from lowest to highest, and they tend to do all kinds of | |
309 | * strange things when they come into contact with PCI bridge chips. The | |
310 | * net result of all this is that the PCI card that is actually used to boot | |
311 | * the machine is very hard to detect. Most motherboards go from lowest | |
312 | * PCI slot number to highest, and the first SCSI controller found is the | |
313 | * one you boot from. The only exceptions to this are when a controller | |
314 | * has its BIOS disabled. So, we by default sort all of our SCSI controllers | |
315 | * from lowest PCI slot number to highest PCI slot number. We also force | |
316 | * all controllers with their BIOS disabled to the end of the list. This | |
317 | * works on *almost* all computers. Where it doesn't work, we have this | |
318 | * option. Setting this option to non-0 will reverse the order of the sort | |
319 | * to highest first, then lowest, but will still leave cards with their BIOS | |
320 | * disabled at the very end. That should fix everyone up unless there are | |
321 | * really strange cirumstances. | |
322 | */ | |
323 | static uint32_t aic7xxx_reverse_scan; | |
324 | ||
325 | /* | |
326 | * Should we force EXTENDED translation on a controller. | |
327 | * 0 == Use whatever is in the SEEPROM or default to off | |
328 | * 1 == Use whatever is in the SEEPROM or default to on | |
329 | */ | |
330 | static uint32_t aic7xxx_extended; | |
331 | ||
332 | /* | |
333 | * PCI bus parity checking of the Adaptec controllers. This is somewhat | |
334 | * dubious at best. To my knowledge, this option has never actually | |
335 | * solved a PCI parity problem, but on certain machines with broken PCI | |
336 | * chipset configurations where stray PCI transactions with bad parity are | |
337 | * the norm rather than the exception, the error messages can be overwelming. | |
338 | * It's included in the driver for completeness. | |
339 | * 0 = Shut off PCI parity check | |
340 | * non-0 = reverse polarity pci parity checking | |
341 | */ | |
342 | static uint32_t aic7xxx_pci_parity = ~0; | |
343 | ||
344 | /* | |
345 | * Certain newer motherboards have put new PCI based devices into the | |
346 | * IO spaces that used to typically be occupied by VLB or EISA cards. | |
347 | * This overlap can cause these newer motherboards to lock up when scanned | |
348 | * for older EISA and VLB devices. Setting this option to non-0 will | |
349 | * cause the driver to skip scanning for any VLB or EISA controllers and | |
350 | * only support the PCI controllers. NOTE: this means that if the kernel | |
351 | * os compiled with PCI support disabled, then setting this to non-0 | |
352 | * would result in never finding any devices :) | |
353 | */ | |
354 | #ifndef CONFIG_AIC7XXX_PROBE_EISA_VL | |
355 | uint32_t aic7xxx_probe_eisa_vl; | |
356 | #else | |
357 | uint32_t aic7xxx_probe_eisa_vl = ~0; | |
358 | #endif | |
359 | ||
360 | /* | |
361 | * There are lots of broken chipsets in the world. Some of them will | |
362 | * violate the PCI spec when we issue byte sized memory writes to our | |
363 | * controller. I/O mapped register access, if allowed by the given | |
364 | * platform, will work in almost all cases. | |
365 | */ | |
366 | uint32_t aic7xxx_allow_memio = ~0; | |
367 | ||
368 | /* | |
369 | * aic7xxx_detect() has been run, so register all device arrivals | |
370 | * immediately with the system rather than deferring to the sorted | |
371 | * attachment performed by aic7xxx_detect(). | |
372 | */ | |
373 | int aic7xxx_detect_complete; | |
374 | ||
375 | /* | |
376 | * So that we can set how long each device is given as a selection timeout. | |
377 | * The table of values goes like this: | |
378 | * 0 - 256ms | |
379 | * 1 - 128ms | |
380 | * 2 - 64ms | |
381 | * 3 - 32ms | |
382 | * We default to 256ms because some older devices need a longer time | |
383 | * to respond to initial selection. | |
384 | */ | |
385 | static uint32_t aic7xxx_seltime; | |
386 | ||
387 | /* | |
388 | * Certain devices do not perform any aging on commands. Should the | |
389 | * device be saturated by commands in one portion of the disk, it is | |
390 | * possible for transactions on far away sectors to never be serviced. | |
391 | * To handle these devices, we can periodically send an ordered tag to | |
392 | * force all outstanding transactions to be serviced prior to a new | |
393 | * transaction. | |
394 | */ | |
395 | uint32_t aic7xxx_periodic_otag; | |
396 | ||
397 | /* | |
398 | * Module information and settable options. | |
399 | */ | |
400 | static char *aic7xxx = NULL; | |
401 | ||
402 | MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); | |
403 | MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver"); | |
404 | MODULE_LICENSE("Dual BSD/GPL"); | |
405 | MODULE_VERSION(AIC7XXX_DRIVER_VERSION); | |
406 | module_param(aic7xxx, charp, 0444); | |
407 | MODULE_PARM_DESC(aic7xxx, | |
408 | "period delimited, options string.\n" | |
409 | " verbose Enable verbose/diagnostic logging\n" | |
410 | " allow_memio Allow device registers to be memory mapped\n" | |
411 | " debug Bitmask of debug values to enable\n" | |
412 | " no_probe Toggle EISA/VLB controller probing\n" | |
413 | " probe_eisa_vl Toggle EISA/VLB controller probing\n" | |
414 | " no_reset Supress initial bus resets\n" | |
415 | " extended Enable extended geometry on all controllers\n" | |
416 | " periodic_otag Send an ordered tagged transaction\n" | |
417 | " periodically to prevent tag starvation.\n" | |
418 | " This may be required by some older disk\n" | |
419 | " drives or RAID arrays.\n" | |
420 | " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n" | |
421 | " tag_info:<tag_str> Set per-target tag depth\n" | |
422 | " global_tag_depth:<int> Global tag depth for every target\n" | |
423 | " on every bus\n" | |
1da177e4 LT |
424 | " seltime:<int> Selection Timeout\n" |
425 | " (0/256ms,1/128ms,2/64ms,3/32ms)\n" | |
426 | "\n" | |
427 | " Sample /etc/modprobe.conf line:\n" | |
428 | " Toggle EISA/VLB probing\n" | |
429 | " Set tag depth on Controller 1/Target 1 to 10 tags\n" | |
430 | " Shorten the selection timeout to 128ms\n" | |
431 | "\n" | |
432 | " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" | |
433 | ); | |
434 | ||
435 | static void ahc_linux_handle_scsi_status(struct ahc_softc *, | |
436 | struct ahc_linux_device *, | |
437 | struct scb *); | |
438 | static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, | |
439 | Scsi_Cmnd *cmd); | |
1da177e4 LT |
440 | static void ahc_linux_sem_timeout(u_long arg); |
441 | static void ahc_linux_freeze_simq(struct ahc_softc *ahc); | |
442 | static void ahc_linux_release_simq(u_long arg); | |
443 | static void ahc_linux_dev_timed_unfreeze(u_long arg); | |
444 | static int ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag); | |
445 | static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); | |
446 | static void ahc_linux_size_nseg(void); | |
447 | static void ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc); | |
1da177e4 LT |
448 | static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, |
449 | struct ahc_devinfo *devinfo); | |
1da177e4 LT |
450 | static void ahc_linux_device_queue_depth(struct ahc_softc *ahc, |
451 | struct ahc_linux_device *dev); | |
452 | static struct ahc_linux_target* ahc_linux_alloc_target(struct ahc_softc*, | |
453 | u_int, u_int); | |
454 | static void ahc_linux_free_target(struct ahc_softc*, | |
455 | struct ahc_linux_target*); | |
456 | static struct ahc_linux_device* ahc_linux_alloc_device(struct ahc_softc*, | |
457 | struct ahc_linux_target*, | |
458 | u_int); | |
459 | static void ahc_linux_free_device(struct ahc_softc*, | |
460 | struct ahc_linux_device*); | |
e4e360c3 JB |
461 | static int ahc_linux_run_command(struct ahc_softc*, |
462 | struct ahc_linux_device *, | |
463 | struct scsi_cmnd *); | |
1da177e4 LT |
464 | static void ahc_linux_setup_tag_info_global(char *p); |
465 | static aic_option_callback_t ahc_linux_setup_tag_info; | |
1da177e4 LT |
466 | static int aic7xxx_setup(char *s); |
467 | static int ahc_linux_next_unit(void); | |
1da177e4 LT |
468 | static struct ahc_cmd *ahc_linux_run_complete_queue(struct ahc_softc *ahc); |
469 | ||
470 | /********************************* Inlines ************************************/ | |
1da177e4 LT |
471 | static __inline struct ahc_linux_device* |
472 | ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, | |
473 | u_int target, u_int lun, int alloc); | |
474 | static __inline void ahc_schedule_completeq(struct ahc_softc *ahc); | |
1da177e4 LT |
475 | static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); |
476 | ||
477 | static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, | |
478 | struct ahc_dma_seg *sg, | |
479 | dma_addr_t addr, bus_size_t len); | |
480 | ||
481 | static __inline void | |
482 | ahc_schedule_completeq(struct ahc_softc *ahc) | |
483 | { | |
484 | if ((ahc->platform_data->flags & AHC_RUN_CMPLT_Q_TIMER) == 0) { | |
485 | ahc->platform_data->flags |= AHC_RUN_CMPLT_Q_TIMER; | |
486 | ahc->platform_data->completeq_timer.expires = jiffies; | |
487 | add_timer(&ahc->platform_data->completeq_timer); | |
488 | } | |
489 | } | |
490 | ||
1da177e4 LT |
491 | static __inline struct ahc_linux_device* |
492 | ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target, | |
493 | u_int lun, int alloc) | |
494 | { | |
495 | struct ahc_linux_target *targ; | |
496 | struct ahc_linux_device *dev; | |
497 | u_int target_offset; | |
498 | ||
499 | target_offset = target; | |
500 | if (channel != 0) | |
501 | target_offset += 8; | |
502 | targ = ahc->platform_data->targets[target_offset]; | |
503 | if (targ == NULL) { | |
504 | if (alloc != 0) { | |
505 | targ = ahc_linux_alloc_target(ahc, channel, target); | |
506 | if (targ == NULL) | |
507 | return (NULL); | |
508 | } else | |
509 | return (NULL); | |
510 | } | |
511 | dev = targ->devices[lun]; | |
512 | if (dev == NULL && alloc != 0) | |
513 | dev = ahc_linux_alloc_device(ahc, targ, lun); | |
514 | return (dev); | |
515 | } | |
516 | ||
517 | #define AHC_LINUX_MAX_RETURNED_ERRORS 4 | |
518 | static struct ahc_cmd * | |
519 | ahc_linux_run_complete_queue(struct ahc_softc *ahc) | |
520 | { | |
521 | struct ahc_cmd *acmd; | |
522 | u_long done_flags; | |
523 | int with_errors; | |
524 | ||
525 | with_errors = 0; | |
526 | ahc_done_lock(ahc, &done_flags); | |
527 | while ((acmd = TAILQ_FIRST(&ahc->platform_data->completeq)) != NULL) { | |
528 | Scsi_Cmnd *cmd; | |
529 | ||
530 | if (with_errors > AHC_LINUX_MAX_RETURNED_ERRORS) { | |
531 | /* | |
532 | * Linux uses stack recursion to requeue | |
533 | * commands that need to be retried. Avoid | |
534 | * blowing out the stack by "spoon feeding" | |
535 | * commands that completed with error back | |
536 | * the operating system in case they are going | |
537 | * to be retried. "ick" | |
538 | */ | |
539 | ahc_schedule_completeq(ahc); | |
540 | break; | |
541 | } | |
542 | TAILQ_REMOVE(&ahc->platform_data->completeq, | |
543 | acmd, acmd_links.tqe); | |
544 | cmd = &acmd_scsi_cmd(acmd); | |
545 | cmd->host_scribble = NULL; | |
546 | if (ahc_cmd_get_transaction_status(cmd) != DID_OK | |
547 | || (cmd->result & 0xFF) != SCSI_STATUS_OK) | |
548 | with_errors++; | |
549 | ||
550 | cmd->scsi_done(cmd); | |
551 | } | |
552 | ahc_done_unlock(ahc, &done_flags); | |
553 | return (acmd); | |
554 | } | |
555 | ||
1da177e4 LT |
556 | static __inline void |
557 | ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) | |
558 | { | |
559 | Scsi_Cmnd *cmd; | |
560 | ||
561 | cmd = scb->io_ctx; | |
562 | ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); | |
563 | if (cmd->use_sg != 0) { | |
564 | struct scatterlist *sg; | |
565 | ||
566 | sg = (struct scatterlist *)cmd->request_buffer; | |
567 | pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg, | |
be7db055 | 568 | cmd->sc_data_direction); |
1da177e4 LT |
569 | } else if (cmd->request_bufflen != 0) { |
570 | pci_unmap_single(ahc->dev_softc, | |
571 | scb->platform_data->buf_busaddr, | |
572 | cmd->request_bufflen, | |
be7db055 | 573 | cmd->sc_data_direction); |
1da177e4 LT |
574 | } |
575 | } | |
576 | ||
577 | static __inline int | |
578 | ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, | |
579 | struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) | |
580 | { | |
581 | int consumed; | |
582 | ||
583 | if ((scb->sg_count + 1) > AHC_NSEG) | |
584 | panic("Too few segs for dma mapping. " | |
585 | "Increase AHC_NSEG\n"); | |
586 | ||
587 | consumed = 1; | |
588 | sg->addr = ahc_htole32(addr & 0xFFFFFFFF); | |
589 | scb->platform_data->xfer_len += len; | |
590 | ||
591 | if (sizeof(dma_addr_t) > 4 | |
592 | && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) | |
593 | len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; | |
594 | ||
595 | sg->len = ahc_htole32(len); | |
596 | return (consumed); | |
597 | } | |
598 | ||
599 | /************************ Host template entry points *************************/ | |
600 | static int ahc_linux_detect(Scsi_Host_Template *); | |
601 | static int ahc_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *)); | |
602 | static const char *ahc_linux_info(struct Scsi_Host *); | |
603 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
604 | static int ahc_linux_slave_alloc(Scsi_Device *); | |
605 | static int ahc_linux_slave_configure(Scsi_Device *); | |
606 | static void ahc_linux_slave_destroy(Scsi_Device *); | |
607 | #if defined(__i386__) | |
608 | static int ahc_linux_biosparam(struct scsi_device*, | |
609 | struct block_device*, | |
610 | sector_t, int[]); | |
611 | #endif | |
612 | #else | |
613 | static int ahc_linux_release(struct Scsi_Host *); | |
614 | static void ahc_linux_select_queue_depth(struct Scsi_Host *host, | |
615 | Scsi_Device *scsi_devs); | |
616 | #if defined(__i386__) | |
617 | static int ahc_linux_biosparam(Disk *, kdev_t, int[]); | |
618 | #endif | |
619 | #endif | |
620 | static int ahc_linux_bus_reset(Scsi_Cmnd *); | |
621 | static int ahc_linux_dev_reset(Scsi_Cmnd *); | |
622 | static int ahc_linux_abort(Scsi_Cmnd *); | |
623 | ||
624 | /* | |
625 | * Calculate a safe value for AHC_NSEG (as expressed through ahc_linux_nseg). | |
626 | * | |
627 | * In pre-2.5.X... | |
628 | * The midlayer allocates an S/G array dynamically when a command is issued | |
629 | * using SCSI malloc. This array, which is in an OS dependent format that | |
630 | * must later be copied to our private S/G list, is sized to house just the | |
631 | * number of segments needed for the current transfer. Since the code that | |
632 | * sizes the SCSI malloc pool does not take into consideration fragmentation | |
633 | * of the pool, executing transactions numbering just a fraction of our | |
634 | * concurrent transaction limit with list lengths aproaching AHC_NSEG will | |
635 | * quickly depleat the SCSI malloc pool of usable space. Unfortunately, the | |
636 | * mid-layer does not properly handle this scsi malloc failures for the S/G | |
637 | * array and the result can be a lockup of the I/O subsystem. We try to size | |
638 | * our S/G list so that it satisfies our drivers allocation requirements in | |
639 | * addition to avoiding fragmentation of the SCSI malloc pool. | |
640 | */ | |
641 | static void | |
642 | ahc_linux_size_nseg(void) | |
643 | { | |
644 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
645 | u_int cur_size; | |
646 | u_int best_size; | |
647 | ||
648 | /* | |
649 | * The SCSI allocator rounds to the nearest 512 bytes | |
650 | * an cannot allocate across a page boundary. Our algorithm | |
651 | * is to start at 1K of scsi malloc space per-command and | |
652 | * loop through all factors of the PAGE_SIZE and pick the best. | |
653 | */ | |
654 | best_size = 0; | |
655 | for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) { | |
656 | u_int nseg; | |
657 | ||
658 | nseg = cur_size / sizeof(struct scatterlist); | |
659 | if (nseg < AHC_LINUX_MIN_NSEG) | |
660 | continue; | |
661 | ||
662 | if (best_size == 0) { | |
663 | best_size = cur_size; | |
664 | ahc_linux_nseg = nseg; | |
665 | } else { | |
666 | u_int best_rem; | |
667 | u_int cur_rem; | |
668 | ||
669 | /* | |
670 | * Compare the traits of the current "best_size" | |
671 | * with the current size to determine if the | |
672 | * current size is a better size. | |
673 | */ | |
674 | best_rem = best_size % sizeof(struct scatterlist); | |
675 | cur_rem = cur_size % sizeof(struct scatterlist); | |
676 | if (cur_rem < best_rem) { | |
677 | best_size = cur_size; | |
678 | ahc_linux_nseg = nseg; | |
679 | } | |
680 | } | |
681 | } | |
682 | #endif | |
683 | } | |
684 | ||
685 | /* | |
686 | * Try to detect an Adaptec 7XXX controller. | |
687 | */ | |
688 | static int | |
689 | ahc_linux_detect(Scsi_Host_Template *template) | |
690 | { | |
691 | struct ahc_softc *ahc; | |
692 | int found = 0; | |
693 | ||
694 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
695 | /* | |
696 | * It is a bug that the upper layer takes | |
697 | * this lock just prior to calling us. | |
698 | */ | |
699 | spin_unlock_irq(&io_request_lock); | |
700 | #endif | |
701 | ||
702 | /* | |
703 | * Sanity checking of Linux SCSI data structures so | |
704 | * that some of our hacks^H^H^H^H^Hassumptions aren't | |
705 | * violated. | |
706 | */ | |
707 | if (offsetof(struct ahc_cmd_internal, end) | |
708 | > offsetof(struct scsi_cmnd, host_scribble)) { | |
709 | printf("ahc_linux_detect: SCSI data structures changed.\n"); | |
710 | printf("ahc_linux_detect: Unable to attach\n"); | |
711 | return (0); | |
712 | } | |
713 | ahc_linux_size_nseg(); | |
714 | /* | |
715 | * If we've been passed any parameters, process them now. | |
716 | */ | |
717 | if (aic7xxx) | |
718 | aic7xxx_setup(aic7xxx); | |
719 | ||
720 | template->proc_name = "aic7xxx"; | |
721 | ||
722 | /* | |
723 | * Initialize our softc list lock prior to | |
724 | * probing for any adapters. | |
725 | */ | |
726 | ahc_list_lockinit(); | |
727 | ||
728 | found = ahc_linux_pci_init(); | |
729 | if (!ahc_linux_eisa_init()) | |
730 | found++; | |
731 | ||
732 | /* | |
733 | * Register with the SCSI layer all | |
734 | * controllers we've found. | |
735 | */ | |
736 | TAILQ_FOREACH(ahc, &ahc_tailq, links) { | |
737 | ||
738 | if (ahc_linux_register_host(ahc, template) == 0) | |
739 | found++; | |
740 | } | |
741 | ||
742 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
743 | spin_lock_irq(&io_request_lock); | |
744 | #endif | |
745 | aic7xxx_detect_complete++; | |
746 | ||
747 | return (found); | |
748 | } | |
749 | ||
750 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
751 | /* | |
752 | * Free the passed in Scsi_Host memory structures prior to unloading the | |
753 | * module. | |
754 | */ | |
755 | int | |
756 | ahc_linux_release(struct Scsi_Host * host) | |
757 | { | |
758 | struct ahc_softc *ahc; | |
759 | u_long l; | |
760 | ||
761 | ahc_list_lock(&l); | |
762 | if (host != NULL) { | |
763 | ||
764 | /* | |
765 | * We should be able to just perform | |
766 | * the free directly, but check our | |
767 | * list for extra sanity. | |
768 | */ | |
769 | ahc = ahc_find_softc(*(struct ahc_softc **)host->hostdata); | |
770 | if (ahc != NULL) { | |
771 | u_long s; | |
772 | ||
773 | ahc_lock(ahc, &s); | |
774 | ahc_intr_enable(ahc, FALSE); | |
775 | ahc_unlock(ahc, &s); | |
776 | ahc_free(ahc); | |
777 | } | |
778 | } | |
779 | ahc_list_unlock(&l); | |
780 | return (0); | |
781 | } | |
782 | #endif | |
783 | ||
784 | /* | |
785 | * Return a string describing the driver. | |
786 | */ | |
787 | static const char * | |
788 | ahc_linux_info(struct Scsi_Host *host) | |
789 | { | |
790 | static char buffer[512]; | |
791 | char ahc_info[256]; | |
792 | char *bp; | |
793 | struct ahc_softc *ahc; | |
794 | ||
795 | bp = &buffer[0]; | |
796 | ahc = *(struct ahc_softc **)host->hostdata; | |
797 | memset(bp, 0, sizeof(buffer)); | |
798 | strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev "); | |
799 | strcat(bp, AIC7XXX_DRIVER_VERSION); | |
800 | strcat(bp, "\n"); | |
801 | strcat(bp, " <"); | |
802 | strcat(bp, ahc->description); | |
803 | strcat(bp, ">\n"); | |
804 | strcat(bp, " "); | |
805 | ahc_controller_info(ahc, ahc_info); | |
806 | strcat(bp, ahc_info); | |
807 | strcat(bp, "\n"); | |
808 | ||
809 | return (bp); | |
810 | } | |
811 | ||
812 | /* | |
813 | * Queue an SCB to the controller. | |
814 | */ | |
815 | static int | |
816 | ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *)) | |
817 | { | |
818 | struct ahc_softc *ahc; | |
819 | struct ahc_linux_device *dev; | |
1da177e4 LT |
820 | |
821 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
822 | ||
823 | /* | |
824 | * Save the callback on completion function. | |
825 | */ | |
826 | cmd->scsi_done = scsi_done; | |
827 | ||
1da177e4 LT |
828 | /* |
829 | * Close the race of a command that was in the process of | |
830 | * being queued to us just as our simq was frozen. Let | |
831 | * DV commands through so long as we are only frozen to | |
832 | * perform DV. | |
833 | */ | |
e4e360c3 JB |
834 | if (ahc->platform_data->qfrozen != 0) |
835 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 836 | |
1da177e4 LT |
837 | dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id, |
838 | cmd->device->lun, /*alloc*/TRUE); | |
e4e360c3 JB |
839 | BUG_ON(dev == NULL); |
840 | ||
1da177e4 | 841 | cmd->result = CAM_REQ_INPROG << 16; |
e4e360c3 JB |
842 | |
843 | return ahc_linux_run_command(ahc, dev, cmd); | |
1da177e4 LT |
844 | } |
845 | ||
846 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
847 | static int | |
848 | ahc_linux_slave_alloc(Scsi_Device *device) | |
849 | { | |
850 | struct ahc_softc *ahc; | |
851 | ||
852 | ahc = *((struct ahc_softc **)device->host->hostdata); | |
853 | if (bootverbose) | |
854 | printf("%s: Slave Alloc %d\n", ahc_name(ahc), device->id); | |
855 | return (0); | |
856 | } | |
857 | ||
858 | static int | |
859 | ahc_linux_slave_configure(Scsi_Device *device) | |
860 | { | |
861 | struct ahc_softc *ahc; | |
862 | struct ahc_linux_device *dev; | |
863 | u_long flags; | |
864 | ||
865 | ahc = *((struct ahc_softc **)device->host->hostdata); | |
866 | if (bootverbose) | |
867 | printf("%s: Slave Configure %d\n", ahc_name(ahc), device->id); | |
868 | ahc_midlayer_entrypoint_lock(ahc, &flags); | |
869 | /* | |
870 | * Since Linux has attached to the device, configure | |
871 | * it so we don't free and allocate the device | |
872 | * structure on every command. | |
873 | */ | |
874 | dev = ahc_linux_get_device(ahc, device->channel, | |
875 | device->id, device->lun, | |
876 | /*alloc*/TRUE); | |
877 | if (dev != NULL) { | |
878 | dev->flags &= ~AHC_DEV_UNCONFIGURED; | |
879 | dev->scsi_device = device; | |
880 | ahc_linux_device_queue_depth(ahc, dev); | |
881 | } | |
882 | ahc_midlayer_entrypoint_unlock(ahc, &flags); | |
cb624029 JB |
883 | |
884 | /* Initial Domain Validation */ | |
885 | if (!spi_initial_dv(device->sdev_target)) | |
886 | spi_dv_device(device); | |
887 | ||
1da177e4 LT |
888 | return (0); |
889 | } | |
890 | ||
891 | static void | |
892 | ahc_linux_slave_destroy(Scsi_Device *device) | |
893 | { | |
894 | struct ahc_softc *ahc; | |
895 | struct ahc_linux_device *dev; | |
896 | u_long flags; | |
897 | ||
898 | ahc = *((struct ahc_softc **)device->host->hostdata); | |
899 | if (bootverbose) | |
900 | printf("%s: Slave Destroy %d\n", ahc_name(ahc), device->id); | |
901 | ahc_midlayer_entrypoint_lock(ahc, &flags); | |
902 | dev = ahc_linux_get_device(ahc, device->channel, | |
903 | device->id, device->lun, | |
904 | /*alloc*/FALSE); | |
905 | /* | |
906 | * Filter out "silly" deletions of real devices by only | |
907 | * deleting devices that have had slave_configure() | |
908 | * called on them. All other devices that have not | |
909 | * been configured will automatically be deleted by | |
910 | * the refcounting process. | |
911 | */ | |
912 | if (dev != NULL | |
913 | && (dev->flags & AHC_DEV_SLAVE_CONFIGURED) != 0) { | |
914 | dev->flags |= AHC_DEV_UNCONFIGURED; | |
e4e360c3 | 915 | if (dev->active == 0 |
1da177e4 LT |
916 | && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0) |
917 | ahc_linux_free_device(ahc, dev); | |
918 | } | |
919 | ahc_midlayer_entrypoint_unlock(ahc, &flags); | |
920 | } | |
921 | #else | |
922 | /* | |
923 | * Sets the queue depth for each SCSI device hanging | |
924 | * off the input host adapter. | |
925 | */ | |
926 | static void | |
927 | ahc_linux_select_queue_depth(struct Scsi_Host *host, Scsi_Device *scsi_devs) | |
928 | { | |
929 | Scsi_Device *device; | |
930 | Scsi_Device *ldev; | |
931 | struct ahc_softc *ahc; | |
932 | u_long flags; | |
933 | ||
934 | ahc = *((struct ahc_softc **)host->hostdata); | |
935 | ahc_lock(ahc, &flags); | |
936 | for (device = scsi_devs; device != NULL; device = device->next) { | |
937 | ||
938 | /* | |
939 | * Watch out for duplicate devices. This works around | |
940 | * some quirks in how the SCSI scanning code does its | |
941 | * device management. | |
942 | */ | |
943 | for (ldev = scsi_devs; ldev != device; ldev = ldev->next) { | |
944 | if (ldev->host == device->host | |
945 | && ldev->channel == device->channel | |
946 | && ldev->id == device->id | |
947 | && ldev->lun == device->lun) | |
948 | break; | |
949 | } | |
950 | /* Skip duplicate. */ | |
951 | if (ldev != device) | |
952 | continue; | |
953 | ||
954 | if (device->host == host) { | |
955 | struct ahc_linux_device *dev; | |
956 | ||
957 | /* | |
958 | * Since Linux has attached to the device, configure | |
959 | * it so we don't free and allocate the device | |
960 | * structure on every command. | |
961 | */ | |
962 | dev = ahc_linux_get_device(ahc, device->channel, | |
963 | device->id, device->lun, | |
964 | /*alloc*/TRUE); | |
965 | if (dev != NULL) { | |
966 | dev->flags &= ~AHC_DEV_UNCONFIGURED; | |
967 | dev->scsi_device = device; | |
968 | ahc_linux_device_queue_depth(ahc, dev); | |
969 | device->queue_depth = dev->openings | |
970 | + dev->active; | |
971 | if ((dev->flags & (AHC_DEV_Q_BASIC | |
972 | | AHC_DEV_Q_TAGGED)) == 0) { | |
973 | /* | |
974 | * We allow the OS to queue 2 untagged | |
975 | * transactions to us at any time even | |
976 | * though we can only execute them | |
977 | * serially on the controller/device. | |
978 | * This should remove some latency. | |
979 | */ | |
980 | device->queue_depth = 2; | |
981 | } | |
982 | } | |
983 | } | |
984 | } | |
985 | ahc_unlock(ahc, &flags); | |
986 | } | |
987 | #endif | |
988 | ||
989 | #if defined(__i386__) | |
990 | /* | |
991 | * Return the disk geometry for the given SCSI device. | |
992 | */ | |
993 | static int | |
994 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
995 | ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, | |
996 | sector_t capacity, int geom[]) | |
997 | { | |
998 | uint8_t *bh; | |
999 | #else | |
1000 | ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[]) | |
1001 | { | |
1002 | struct scsi_device *sdev = disk->device; | |
1003 | u_long capacity = disk->capacity; | |
1004 | struct buffer_head *bh; | |
1005 | #endif | |
1006 | int heads; | |
1007 | int sectors; | |
1008 | int cylinders; | |
1009 | int ret; | |
1010 | int extended; | |
1011 | struct ahc_softc *ahc; | |
1012 | u_int channel; | |
1013 | ||
1014 | ahc = *((struct ahc_softc **)sdev->host->hostdata); | |
1015 | channel = sdev->channel; | |
1016 | ||
1017 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
1018 | bh = scsi_bios_ptable(bdev); | |
1019 | #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17) | |
1020 | bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev)); | |
1021 | #else | |
1022 | bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024); | |
1023 | #endif | |
1024 | ||
1025 | if (bh) { | |
1026 | ret = scsi_partsize(bh, capacity, | |
1027 | &geom[2], &geom[0], &geom[1]); | |
1028 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
1029 | kfree(bh); | |
1030 | #else | |
1031 | brelse(bh); | |
1032 | #endif | |
1033 | if (ret != -1) | |
1034 | return (ret); | |
1035 | } | |
1036 | heads = 64; | |
1037 | sectors = 32; | |
1038 | cylinders = aic_sector_div(capacity, heads, sectors); | |
1039 | ||
1040 | if (aic7xxx_extended != 0) | |
1041 | extended = 1; | |
1042 | else if (channel == 0) | |
1043 | extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; | |
1044 | else | |
1045 | extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; | |
1046 | if (extended && cylinders >= 1024) { | |
1047 | heads = 255; | |
1048 | sectors = 63; | |
1049 | cylinders = aic_sector_div(capacity, heads, sectors); | |
1050 | } | |
1051 | geom[0] = heads; | |
1052 | geom[1] = sectors; | |
1053 | geom[2] = cylinders; | |
1054 | return (0); | |
1055 | } | |
1056 | #endif | |
1057 | ||
1058 | /* | |
1059 | * Abort the current SCSI command(s). | |
1060 | */ | |
1061 | static int | |
1062 | ahc_linux_abort(Scsi_Cmnd *cmd) | |
1063 | { | |
1064 | int error; | |
1065 | ||
1066 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); | |
1067 | if (error != 0) | |
1068 | printf("aic7xxx_abort returns 0x%x\n", error); | |
1069 | return (error); | |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | * Attempt to send a target reset message to the device that timed out. | |
1074 | */ | |
1075 | static int | |
1076 | ahc_linux_dev_reset(Scsi_Cmnd *cmd) | |
1077 | { | |
1078 | int error; | |
1079 | ||
1080 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); | |
1081 | if (error != 0) | |
1082 | printf("aic7xxx_dev_reset returns 0x%x\n", error); | |
1083 | return (error); | |
1084 | } | |
1085 | ||
1086 | /* | |
1087 | * Reset the SCSI bus. | |
1088 | */ | |
1089 | static int | |
1090 | ahc_linux_bus_reset(Scsi_Cmnd *cmd) | |
1091 | { | |
1092 | struct ahc_softc *ahc; | |
1093 | u_long s; | |
1094 | int found; | |
1095 | ||
1096 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
1097 | ahc_midlayer_entrypoint_lock(ahc, &s); | |
1098 | found = ahc_reset_channel(ahc, cmd->device->channel + 'A', | |
1099 | /*initiate reset*/TRUE); | |
1100 | ahc_linux_run_complete_queue(ahc); | |
1101 | ahc_midlayer_entrypoint_unlock(ahc, &s); | |
1102 | ||
1103 | if (bootverbose) | |
1104 | printf("%s: SCSI bus reset delivered. " | |
1105 | "%d SCBs aborted.\n", ahc_name(ahc), found); | |
1106 | ||
1107 | return SUCCESS; | |
1108 | } | |
1109 | ||
1110 | Scsi_Host_Template aic7xxx_driver_template = { | |
1111 | .module = THIS_MODULE, | |
1112 | .name = "aic7xxx", | |
1113 | .proc_info = ahc_linux_proc_info, | |
1114 | .info = ahc_linux_info, | |
1115 | .queuecommand = ahc_linux_queue, | |
1116 | .eh_abort_handler = ahc_linux_abort, | |
1117 | .eh_device_reset_handler = ahc_linux_dev_reset, | |
1118 | .eh_bus_reset_handler = ahc_linux_bus_reset, | |
1119 | #if defined(__i386__) | |
1120 | .bios_param = ahc_linux_biosparam, | |
1121 | #endif | |
1122 | .can_queue = AHC_MAX_QUEUE, | |
1123 | .this_id = -1, | |
1124 | .cmd_per_lun = 2, | |
1125 | .use_clustering = ENABLE_CLUSTERING, | |
1126 | .slave_alloc = ahc_linux_slave_alloc, | |
1127 | .slave_configure = ahc_linux_slave_configure, | |
1128 | .slave_destroy = ahc_linux_slave_destroy, | |
1129 | }; | |
1130 | ||
1131 | /**************************** Tasklet Handler *********************************/ | |
1132 | ||
1da177e4 LT |
1133 | /******************************** Macros **************************************/ |
1134 | #define BUILD_SCSIID(ahc, cmd) \ | |
1135 | ((((cmd)->device->id << TID_SHIFT) & TID) \ | |
1136 | | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ | |
1137 | | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) | |
1138 | ||
1139 | /******************************** Bus DMA *************************************/ | |
1140 | int | |
1141 | ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, | |
1142 | bus_size_t alignment, bus_size_t boundary, | |
1143 | dma_addr_t lowaddr, dma_addr_t highaddr, | |
1144 | bus_dma_filter_t *filter, void *filterarg, | |
1145 | bus_size_t maxsize, int nsegments, | |
1146 | bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) | |
1147 | { | |
1148 | bus_dma_tag_t dmat; | |
1149 | ||
1150 | dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); | |
1151 | if (dmat == NULL) | |
1152 | return (ENOMEM); | |
1153 | ||
1154 | /* | |
1155 | * Linux is very simplistic about DMA memory. For now don't | |
1156 | * maintain all specification information. Once Linux supplies | |
1157 | * better facilities for doing these operations, or the | |
1158 | * needs of this particular driver change, we might need to do | |
1159 | * more here. | |
1160 | */ | |
1161 | dmat->alignment = alignment; | |
1162 | dmat->boundary = boundary; | |
1163 | dmat->maxsize = maxsize; | |
1164 | *ret_tag = dmat; | |
1165 | return (0); | |
1166 | } | |
1167 | ||
1168 | void | |
1169 | ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) | |
1170 | { | |
1171 | free(dmat, M_DEVBUF); | |
1172 | } | |
1173 | ||
1174 | int | |
1175 | ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, | |
1176 | int flags, bus_dmamap_t *mapp) | |
1177 | { | |
1178 | bus_dmamap_t map; | |
1179 | ||
1180 | map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT); | |
1181 | if (map == NULL) | |
1182 | return (ENOMEM); | |
1183 | /* | |
1184 | * Although we can dma data above 4GB, our | |
1185 | * "consistent" memory is below 4GB for | |
1186 | * space efficiency reasons (only need a 4byte | |
1187 | * address). For this reason, we have to reset | |
1188 | * our dma mask when doing allocations. | |
1189 | */ | |
1190 | if (ahc->dev_softc != NULL) | |
1191 | if (pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF)) { | |
1192 | printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n"); | |
1193 | kfree(map); | |
1194 | return (ENODEV); | |
1195 | } | |
1196 | *vaddr = pci_alloc_consistent(ahc->dev_softc, | |
1197 | dmat->maxsize, &map->bus_addr); | |
1198 | if (ahc->dev_softc != NULL) | |
1199 | if (pci_set_dma_mask(ahc->dev_softc, | |
1200 | ahc->platform_data->hw_dma_mask)) { | |
1201 | printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n"); | |
1202 | kfree(map); | |
1203 | return (ENODEV); | |
1204 | } | |
1205 | if (*vaddr == NULL) | |
1206 | return (ENOMEM); | |
1207 | *mapp = map; | |
1208 | return(0); | |
1209 | } | |
1210 | ||
1211 | void | |
1212 | ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, | |
1213 | void* vaddr, bus_dmamap_t map) | |
1214 | { | |
1215 | pci_free_consistent(ahc->dev_softc, dmat->maxsize, | |
1216 | vaddr, map->bus_addr); | |
1217 | } | |
1218 | ||
1219 | int | |
1220 | ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, | |
1221 | void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, | |
1222 | void *cb_arg, int flags) | |
1223 | { | |
1224 | /* | |
1225 | * Assume for now that this will only be used during | |
1226 | * initialization and not for per-transaction buffer mapping. | |
1227 | */ | |
1228 | bus_dma_segment_t stack_sg; | |
1229 | ||
1230 | stack_sg.ds_addr = map->bus_addr; | |
1231 | stack_sg.ds_len = dmat->maxsize; | |
1232 | cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); | |
1233 | return (0); | |
1234 | } | |
1235 | ||
1236 | void | |
1237 | ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | |
1238 | { | |
1239 | /* | |
1240 | * The map may is NULL in our < 2.3.X implementation. | |
1241 | * Now it's 2.6.5, but just in case... | |
1242 | */ | |
1243 | BUG_ON(map == NULL); | |
1244 | free(map, M_DEVBUF); | |
1245 | } | |
1246 | ||
1247 | int | |
1248 | ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | |
1249 | { | |
1250 | /* Nothing to do */ | |
1251 | return (0); | |
1252 | } | |
1253 | ||
1254 | /********************* Platform Dependent Functions ***************************/ | |
1255 | /* | |
1256 | * Compare "left hand" softc with "right hand" softc, returning: | |
1257 | * < 0 - lahc has a lower priority than rahc | |
1258 | * 0 - Softcs are equal | |
1259 | * > 0 - lahc has a higher priority than rahc | |
1260 | */ | |
1261 | int | |
1262 | ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc) | |
1263 | { | |
1264 | int value; | |
1265 | int rvalue; | |
1266 | int lvalue; | |
1267 | ||
1268 | /* | |
1269 | * Under Linux, cards are ordered as follows: | |
1270 | * 1) VLB/EISA BIOS enabled devices sorted by BIOS address. | |
1271 | * 2) PCI devices with BIOS enabled sorted by bus/slot/func. | |
1272 | * 3) All remaining VLB/EISA devices sorted by ioport. | |
1273 | * 4) All remaining PCI devices sorted by bus/slot/func. | |
1274 | */ | |
1275 | value = (lahc->flags & AHC_BIOS_ENABLED) | |
1276 | - (rahc->flags & AHC_BIOS_ENABLED); | |
1277 | if (value != 0) | |
1278 | /* Controllers with BIOS enabled have a *higher* priority */ | |
1279 | return (value); | |
1280 | ||
1281 | /* | |
1282 | * Same BIOS setting, now sort based on bus type. | |
1283 | * EISA and VL controllers sort together. EISA/VL | |
1284 | * have higher priority than PCI. | |
1285 | */ | |
1286 | rvalue = (rahc->chip & AHC_BUS_MASK); | |
1287 | if (rvalue == AHC_VL) | |
1288 | rvalue = AHC_EISA; | |
1289 | lvalue = (lahc->chip & AHC_BUS_MASK); | |
1290 | if (lvalue == AHC_VL) | |
1291 | lvalue = AHC_EISA; | |
1292 | value = rvalue - lvalue; | |
1293 | if (value != 0) | |
1294 | return (value); | |
1295 | ||
1296 | /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */ | |
1297 | switch (rvalue) { | |
1298 | #ifdef CONFIG_PCI | |
1299 | case AHC_PCI: | |
1300 | { | |
1301 | char primary_channel; | |
1302 | ||
1303 | if (aic7xxx_reverse_scan != 0) | |
1304 | value = ahc_get_pci_bus(lahc->dev_softc) | |
1305 | - ahc_get_pci_bus(rahc->dev_softc); | |
1306 | else | |
1307 | value = ahc_get_pci_bus(rahc->dev_softc) | |
1308 | - ahc_get_pci_bus(lahc->dev_softc); | |
1309 | if (value != 0) | |
1310 | break; | |
1311 | if (aic7xxx_reverse_scan != 0) | |
1312 | value = ahc_get_pci_slot(lahc->dev_softc) | |
1313 | - ahc_get_pci_slot(rahc->dev_softc); | |
1314 | else | |
1315 | value = ahc_get_pci_slot(rahc->dev_softc) | |
1316 | - ahc_get_pci_slot(lahc->dev_softc); | |
1317 | if (value != 0) | |
1318 | break; | |
1319 | /* | |
1320 | * On multi-function devices, the user can choose | |
1321 | * to have function 1 probed before function 0. | |
1322 | * Give whichever channel is the primary channel | |
1323 | * the highest priority. | |
1324 | */ | |
1325 | primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A'; | |
1326 | value = -1; | |
1327 | if (lahc->channel == primary_channel) | |
1328 | value = 1; | |
1329 | break; | |
1330 | } | |
1331 | #endif | |
1332 | case AHC_EISA: | |
1333 | if ((rahc->flags & AHC_BIOS_ENABLED) != 0) { | |
1334 | value = rahc->platform_data->bios_address | |
1335 | - lahc->platform_data->bios_address; | |
1336 | } else { | |
1337 | value = rahc->bsh.ioport | |
1338 | - lahc->bsh.ioport; | |
1339 | } | |
1340 | break; | |
1341 | default: | |
1342 | panic("ahc_softc_sort: invalid bus type"); | |
1343 | } | |
1344 | return (value); | |
1345 | } | |
1346 | ||
1347 | static void | |
1348 | ahc_linux_setup_tag_info_global(char *p) | |
1349 | { | |
1350 | int tags, i, j; | |
1351 | ||
1352 | tags = simple_strtoul(p + 1, NULL, 0) & 0xff; | |
1353 | printf("Setting Global Tags= %d\n", tags); | |
1354 | ||
1355 | for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) { | |
1356 | for (j = 0; j < AHC_NUM_TARGETS; j++) { | |
1357 | aic7xxx_tag_info[i].tag_commands[j] = tags; | |
1358 | } | |
1359 | } | |
1360 | } | |
1361 | ||
1362 | static void | |
1363 | ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) | |
1364 | { | |
1365 | ||
1366 | if ((instance >= 0) && (targ >= 0) | |
1367 | && (instance < NUM_ELEMENTS(aic7xxx_tag_info)) | |
1368 | && (targ < AHC_NUM_TARGETS)) { | |
1369 | aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; | |
1370 | if (bootverbose) | |
1371 | printf("tag_info[%d:%d] = %d\n", instance, targ, value); | |
1372 | } | |
1373 | } | |
1374 | ||
1da177e4 LT |
1375 | /* |
1376 | * Handle Linux boot parameters. This routine allows for assigning a value | |
1377 | * to a parameter with a ':' between the parameter and the value. | |
1378 | * ie. aic7xxx=stpwlev:1,extended | |
1379 | */ | |
1380 | static int | |
1381 | aic7xxx_setup(char *s) | |
1382 | { | |
1383 | int i, n; | |
1384 | char *p; | |
1385 | char *end; | |
1386 | ||
1387 | static struct { | |
1388 | const char *name; | |
1389 | uint32_t *flag; | |
1390 | } options[] = { | |
1391 | { "extended", &aic7xxx_extended }, | |
1392 | { "no_reset", &aic7xxx_no_reset }, | |
1393 | { "verbose", &aic7xxx_verbose }, | |
1394 | { "allow_memio", &aic7xxx_allow_memio}, | |
1395 | #ifdef AHC_DEBUG | |
1396 | { "debug", &ahc_debug }, | |
1397 | #endif | |
1398 | { "reverse_scan", &aic7xxx_reverse_scan }, | |
1399 | { "no_probe", &aic7xxx_probe_eisa_vl }, | |
1400 | { "probe_eisa_vl", &aic7xxx_probe_eisa_vl }, | |
1401 | { "periodic_otag", &aic7xxx_periodic_otag }, | |
1402 | { "pci_parity", &aic7xxx_pci_parity }, | |
1403 | { "seltime", &aic7xxx_seltime }, | |
1404 | { "tag_info", NULL }, | |
1405 | { "global_tag_depth", NULL }, | |
1406 | { "dv", NULL } | |
1407 | }; | |
1408 | ||
1409 | end = strchr(s, '\0'); | |
1410 | ||
1411 | /* | |
1412 | * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS | |
1413 | * will never be 0 in this case. | |
1414 | */ | |
1415 | n = 0; | |
1416 | ||
1417 | while ((p = strsep(&s, ",.")) != NULL) { | |
1418 | if (*p == '\0') | |
1419 | continue; | |
1420 | for (i = 0; i < NUM_ELEMENTS(options); i++) { | |
1421 | ||
1422 | n = strlen(options[i].name); | |
1423 | if (strncmp(options[i].name, p, n) == 0) | |
1424 | break; | |
1425 | } | |
1426 | if (i == NUM_ELEMENTS(options)) | |
1427 | continue; | |
1428 | ||
1429 | if (strncmp(p, "global_tag_depth", n) == 0) { | |
1430 | ahc_linux_setup_tag_info_global(p + n); | |
1431 | } else if (strncmp(p, "tag_info", n) == 0) { | |
1432 | s = aic_parse_brace_option("tag_info", p + n, end, | |
1433 | 2, ahc_linux_setup_tag_info, 0); | |
1da177e4 LT |
1434 | } else if (p[n] == ':') { |
1435 | *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); | |
1436 | } else if (strncmp(p, "verbose", n) == 0) { | |
1437 | *(options[i].flag) = 1; | |
1438 | } else { | |
1439 | *(options[i].flag) ^= 0xFFFFFFFF; | |
1440 | } | |
1441 | } | |
1442 | return 1; | |
1443 | } | |
1444 | ||
1445 | __setup("aic7xxx=", aic7xxx_setup); | |
1446 | ||
1447 | uint32_t aic7xxx_verbose; | |
1448 | ||
1449 | int | |
1450 | ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template) | |
1451 | { | |
1452 | char buf[80]; | |
1453 | struct Scsi_Host *host; | |
1454 | char *new_name; | |
1455 | u_long s; | |
1da177e4 LT |
1456 | |
1457 | template->name = ahc->description; | |
1458 | host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); | |
1459 | if (host == NULL) | |
1460 | return (ENOMEM); | |
1461 | ||
1462 | *((struct ahc_softc **)host->hostdata) = ahc; | |
1463 | ahc_lock(ahc, &s); | |
1464 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
1465 | scsi_assign_lock(host, &ahc->platform_data->spin_lock); | |
1466 | #elif AHC_SCSI_HAS_HOST_LOCK != 0 | |
1467 | host->lock = &ahc->platform_data->spin_lock; | |
1468 | #endif | |
1469 | ahc->platform_data->host = host; | |
1470 | host->can_queue = AHC_MAX_QUEUE; | |
1471 | host->cmd_per_lun = 2; | |
1472 | /* XXX No way to communicate the ID for multiple channels */ | |
1473 | host->this_id = ahc->our_id; | |
1474 | host->irq = ahc->platform_data->irq; | |
1475 | host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; | |
1476 | host->max_lun = AHC_NUM_LUNS; | |
1477 | host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; | |
1478 | host->sg_tablesize = AHC_NSEG; | |
1479 | ahc_set_unit(ahc, ahc_linux_next_unit()); | |
1480 | sprintf(buf, "scsi%d", host->host_no); | |
1481 | new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); | |
1482 | if (new_name != NULL) { | |
1483 | strcpy(new_name, buf); | |
1484 | ahc_set_name(ahc, new_name); | |
1485 | } | |
1486 | host->unique_id = ahc->unit; | |
1487 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
1488 | scsi_set_pci_device(host, ahc->dev_softc); | |
1489 | #endif | |
1490 | ahc_linux_initialize_scsi_bus(ahc); | |
1da177e4 | 1491 | ahc_intr_enable(ahc, TRUE); |
1da177e4 LT |
1492 | ahc_unlock(ahc, &s); |
1493 | ||
92d161c3 JB |
1494 | host->transportt = ahc_linux_transport_template; |
1495 | ||
1da177e4 LT |
1496 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
1497 | scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */ | |
1498 | scsi_scan_host(host); | |
1499 | #endif | |
1500 | return (0); | |
1501 | } | |
1502 | ||
1503 | uint64_t | |
1504 | ahc_linux_get_memsize(void) | |
1505 | { | |
1506 | struct sysinfo si; | |
1507 | ||
1508 | si_meminfo(&si); | |
1509 | return ((uint64_t)si.totalram << PAGE_SHIFT); | |
1510 | } | |
1511 | ||
1512 | /* | |
1513 | * Find the smallest available unit number to use | |
1514 | * for a new device. We don't just use a static | |
1515 | * count to handle the "repeated hot-(un)plug" | |
1516 | * scenario. | |
1517 | */ | |
1518 | static int | |
1519 | ahc_linux_next_unit(void) | |
1520 | { | |
1521 | struct ahc_softc *ahc; | |
1522 | int unit; | |
1523 | ||
1524 | unit = 0; | |
1525 | retry: | |
1526 | TAILQ_FOREACH(ahc, &ahc_tailq, links) { | |
1527 | if (ahc->unit == unit) { | |
1528 | unit++; | |
1529 | goto retry; | |
1530 | } | |
1531 | } | |
1532 | return (unit); | |
1533 | } | |
1534 | ||
1535 | /* | |
1536 | * Place the SCSI bus into a known state by either resetting it, | |
1537 | * or forcing transfer negotiations on the next command to any | |
1538 | * target. | |
1539 | */ | |
1540 | void | |
1541 | ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) | |
1542 | { | |
1543 | int i; | |
1544 | int numtarg; | |
1545 | ||
1546 | i = 0; | |
1547 | numtarg = 0; | |
1548 | ||
1549 | if (aic7xxx_no_reset != 0) | |
1550 | ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); | |
1551 | ||
1552 | if ((ahc->flags & AHC_RESET_BUS_A) != 0) | |
1553 | ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); | |
1554 | else | |
1555 | numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; | |
1556 | ||
1557 | if ((ahc->features & AHC_TWIN) != 0) { | |
1558 | ||
1559 | if ((ahc->flags & AHC_RESET_BUS_B) != 0) { | |
1560 | ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); | |
1561 | } else { | |
1562 | if (numtarg == 0) | |
1563 | i = 8; | |
1564 | numtarg += 8; | |
1565 | } | |
1566 | } | |
1567 | ||
1568 | /* | |
1569 | * Force negotiation to async for all targets that | |
1570 | * will not see an initial bus reset. | |
1571 | */ | |
1572 | for (; i < numtarg; i++) { | |
1573 | struct ahc_devinfo devinfo; | |
1574 | struct ahc_initiator_tinfo *tinfo; | |
1575 | struct ahc_tmode_tstate *tstate; | |
1576 | u_int our_id; | |
1577 | u_int target_id; | |
1578 | char channel; | |
1579 | ||
1580 | channel = 'A'; | |
1581 | our_id = ahc->our_id; | |
1582 | target_id = i; | |
1583 | if (i > 7 && (ahc->features & AHC_TWIN) != 0) { | |
1584 | channel = 'B'; | |
1585 | our_id = ahc->our_id_b; | |
1586 | target_id = i % 8; | |
1587 | } | |
1588 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, | |
1589 | target_id, &tstate); | |
1590 | ahc_compile_devinfo(&devinfo, our_id, target_id, | |
1591 | CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); | |
1592 | ahc_update_neg_request(ahc, &devinfo, tstate, | |
1593 | tinfo, AHC_NEG_ALWAYS); | |
1594 | } | |
1595 | /* Give the bus some time to recover */ | |
1596 | if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { | |
1597 | ahc_linux_freeze_simq(ahc); | |
1598 | init_timer(&ahc->platform_data->reset_timer); | |
1599 | ahc->platform_data->reset_timer.data = (u_long)ahc; | |
1600 | ahc->platform_data->reset_timer.expires = | |
1601 | jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000; | |
1602 | ahc->platform_data->reset_timer.function = | |
1603 | ahc_linux_release_simq; | |
1604 | add_timer(&ahc->platform_data->reset_timer); | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | int | |
1609 | ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) | |
1610 | { | |
1611 | ||
1612 | ahc->platform_data = | |
1613 | malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); | |
1614 | if (ahc->platform_data == NULL) | |
1615 | return (ENOMEM); | |
1616 | memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); | |
1617 | TAILQ_INIT(&ahc->platform_data->completeq); | |
1618 | TAILQ_INIT(&ahc->platform_data->device_runq); | |
1619 | ahc->platform_data->irq = AHC_LINUX_NOIRQ; | |
1620 | ahc->platform_data->hw_dma_mask = 0xFFFFFFFF; | |
1621 | ahc_lockinit(ahc); | |
1622 | ahc_done_lockinit(ahc); | |
1623 | init_timer(&ahc->platform_data->completeq_timer); | |
1624 | ahc->platform_data->completeq_timer.data = (u_long)ahc; | |
1625 | ahc->platform_data->completeq_timer.function = | |
1626 | (ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue; | |
1627 | init_MUTEX_LOCKED(&ahc->platform_data->eh_sem); | |
1da177e4 LT |
1628 | ahc->seltime = (aic7xxx_seltime & 0x3) << 4; |
1629 | ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; | |
1630 | if (aic7xxx_pci_parity == 0) | |
1631 | ahc->flags |= AHC_DISABLE_PCI_PERR; | |
1632 | ||
1633 | return (0); | |
1634 | } | |
1635 | ||
1636 | void | |
1637 | ahc_platform_free(struct ahc_softc *ahc) | |
1638 | { | |
1639 | struct ahc_linux_target *targ; | |
1640 | struct ahc_linux_device *dev; | |
1641 | int i, j; | |
1642 | ||
1643 | if (ahc->platform_data != NULL) { | |
1644 | del_timer_sync(&ahc->platform_data->completeq_timer); | |
1da177e4 LT |
1645 | if (ahc->platform_data->host != NULL) { |
1646 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
1647 | scsi_remove_host(ahc->platform_data->host); | |
1648 | #endif | |
1649 | scsi_host_put(ahc->platform_data->host); | |
1650 | } | |
1651 | ||
1652 | /* destroy all of the device and target objects */ | |
1653 | for (i = 0; i < AHC_NUM_TARGETS; i++) { | |
1654 | targ = ahc->platform_data->targets[i]; | |
1655 | if (targ != NULL) { | |
1656 | /* Keep target around through the loop. */ | |
1657 | targ->refcount++; | |
1658 | for (j = 0; j < AHC_NUM_LUNS; j++) { | |
1659 | ||
1660 | if (targ->devices[j] == NULL) | |
1661 | continue; | |
1662 | dev = targ->devices[j]; | |
1663 | ahc_linux_free_device(ahc, dev); | |
1664 | } | |
1665 | /* | |
1666 | * Forcibly free the target now that | |
1667 | * all devices are gone. | |
1668 | */ | |
1669 | ahc_linux_free_target(ahc, targ); | |
1670 | } | |
1671 | } | |
1672 | ||
1673 | if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) | |
1674 | free_irq(ahc->platform_data->irq, ahc); | |
1675 | if (ahc->tag == BUS_SPACE_PIO | |
1676 | && ahc->bsh.ioport != 0) | |
1677 | release_region(ahc->bsh.ioport, 256); | |
1678 | if (ahc->tag == BUS_SPACE_MEMIO | |
1679 | && ahc->bsh.maddr != NULL) { | |
1680 | iounmap(ahc->bsh.maddr); | |
1681 | release_mem_region(ahc->platform_data->mem_busaddr, | |
1682 | 0x1000); | |
1683 | } | |
1684 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
1685 | /* | |
1686 | * In 2.4 we detach from the scsi midlayer before the PCI | |
1687 | * layer invokes our remove callback. No per-instance | |
1688 | * detach is provided, so we must reach inside the PCI | |
1689 | * subsystem's internals and detach our driver manually. | |
1690 | */ | |
1691 | if (ahc->dev_softc != NULL) | |
1692 | ahc->dev_softc->driver = NULL; | |
1693 | #endif | |
1694 | free(ahc->platform_data, M_DEVBUF); | |
1695 | } | |
1696 | } | |
1697 | ||
1698 | void | |
1699 | ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) | |
1700 | { | |
1701 | ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), | |
1702 | SCB_GET_CHANNEL(ahc, scb), | |
1703 | SCB_GET_LUN(scb), SCB_LIST_NULL, | |
1704 | ROLE_UNKNOWN, CAM_REQUEUE_REQ); | |
1705 | } | |
1706 | ||
1707 | void | |
1708 | ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, | |
1709 | ahc_queue_alg alg) | |
1710 | { | |
1711 | struct ahc_linux_device *dev; | |
1712 | int was_queuing; | |
1713 | int now_queuing; | |
1714 | ||
1715 | dev = ahc_linux_get_device(ahc, devinfo->channel - 'A', | |
1716 | devinfo->target, | |
1717 | devinfo->lun, /*alloc*/FALSE); | |
1718 | if (dev == NULL) | |
1719 | return; | |
1720 | was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); | |
1721 | switch (alg) { | |
1722 | default: | |
1723 | case AHC_QUEUE_NONE: | |
1724 | now_queuing = 0; | |
1725 | break; | |
1726 | case AHC_QUEUE_BASIC: | |
1727 | now_queuing = AHC_DEV_Q_BASIC; | |
1728 | break; | |
1729 | case AHC_QUEUE_TAGGED: | |
1730 | now_queuing = AHC_DEV_Q_TAGGED; | |
1731 | break; | |
1732 | } | |
1733 | if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 | |
1734 | && (was_queuing != now_queuing) | |
1735 | && (dev->active != 0)) { | |
1736 | dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; | |
1737 | dev->qfrozen++; | |
1738 | } | |
1739 | ||
1740 | dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); | |
1741 | if (now_queuing) { | |
1742 | u_int usertags; | |
1743 | ||
1744 | usertags = ahc_linux_user_tagdepth(ahc, devinfo); | |
1745 | if (!was_queuing) { | |
1746 | /* | |
1747 | * Start out agressively and allow our | |
1748 | * dynamic queue depth algorithm to take | |
1749 | * care of the rest. | |
1750 | */ | |
1751 | dev->maxtags = usertags; | |
1752 | dev->openings = dev->maxtags - dev->active; | |
1753 | } | |
1754 | if (dev->maxtags == 0) { | |
1755 | /* | |
1756 | * Queueing is disabled by the user. | |
1757 | */ | |
1758 | dev->openings = 1; | |
1759 | } else if (alg == AHC_QUEUE_TAGGED) { | |
1760 | dev->flags |= AHC_DEV_Q_TAGGED; | |
1761 | if (aic7xxx_periodic_otag != 0) | |
1762 | dev->flags |= AHC_DEV_PERIODIC_OTAG; | |
1763 | } else | |
1764 | dev->flags |= AHC_DEV_Q_BASIC; | |
1765 | } else { | |
1766 | /* We can only have one opening. */ | |
1767 | dev->maxtags = 0; | |
1768 | dev->openings = 1 - dev->active; | |
1769 | } | |
1770 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
1771 | if (dev->scsi_device != NULL) { | |
1772 | switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { | |
1773 | case AHC_DEV_Q_BASIC: | |
1774 | scsi_adjust_queue_depth(dev->scsi_device, | |
1775 | MSG_SIMPLE_TASK, | |
1776 | dev->openings + dev->active); | |
1777 | break; | |
1778 | case AHC_DEV_Q_TAGGED: | |
1779 | scsi_adjust_queue_depth(dev->scsi_device, | |
1780 | MSG_ORDERED_TASK, | |
1781 | dev->openings + dev->active); | |
1782 | break; | |
1783 | default: | |
1784 | /* | |
1785 | * We allow the OS to queue 2 untagged transactions to | |
1786 | * us at any time even though we can only execute them | |
1787 | * serially on the controller/device. This should | |
1788 | * remove some latency. | |
1789 | */ | |
1790 | scsi_adjust_queue_depth(dev->scsi_device, | |
1791 | /*NON-TAGGED*/0, | |
1792 | /*queue depth*/2); | |
1793 | break; | |
1794 | } | |
1795 | } | |
1796 | #endif | |
1797 | } | |
1798 | ||
1799 | int | |
1800 | ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, | |
1801 | int lun, u_int tag, role_t role, uint32_t status) | |
1802 | { | |
e4e360c3 | 1803 | return 0; |
1da177e4 LT |
1804 | } |
1805 | ||
1806 | static void | |
1807 | ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc) | |
1808 | { | |
1809 | u_long flags; | |
1810 | ||
1811 | ahc_lock(ahc, &flags); | |
1812 | del_timer(&ahc->platform_data->completeq_timer); | |
1813 | ahc->platform_data->flags &= ~AHC_RUN_CMPLT_Q_TIMER; | |
1814 | ahc_linux_run_complete_queue(ahc); | |
1815 | ahc_unlock(ahc, &flags); | |
1816 | } | |
1817 | ||
cb624029 JB |
1818 | static u_int |
1819 | ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) | |
1da177e4 | 1820 | { |
cb624029 JB |
1821 | static int warned_user; |
1822 | u_int tags; | |
1da177e4 | 1823 | |
cb624029 JB |
1824 | tags = 0; |
1825 | if ((ahc->user_discenable & devinfo->target_mask) != 0) { | |
1826 | if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) { | |
1827 | if (warned_user == 0) { | |
1da177e4 | 1828 | |
cb624029 JB |
1829 | printf(KERN_WARNING |
1830 | "aic7xxx: WARNING: Insufficient tag_info instances\n" | |
1831 | "aic7xxx: for installed controllers. Using defaults\n" | |
1832 | "aic7xxx: Please update the aic7xxx_tag_info array in\n" | |
1833 | "aic7xxx: the aic7xxx_osm..c source file.\n"); | |
1834 | warned_user++; | |
1835 | } | |
1836 | tags = AHC_MAX_QUEUE; | |
1837 | } else { | |
1838 | adapter_tag_info_t *tag_info; | |
1da177e4 | 1839 | |
cb624029 JB |
1840 | tag_info = &aic7xxx_tag_info[ahc->unit]; |
1841 | tags = tag_info->tag_commands[devinfo->target_offset]; | |
1842 | if (tags > AHC_MAX_QUEUE) | |
1843 | tags = AHC_MAX_QUEUE; | |
1844 | } | |
1da177e4 | 1845 | } |
cb624029 | 1846 | return (tags); |
1da177e4 LT |
1847 | } |
1848 | ||
cb624029 JB |
1849 | /* |
1850 | * Determines the queue depth for a given device. | |
1851 | */ | |
1da177e4 | 1852 | static void |
cb624029 JB |
1853 | ahc_linux_device_queue_depth(struct ahc_softc *ahc, |
1854 | struct ahc_linux_device *dev) | |
1da177e4 | 1855 | { |
cb624029 JB |
1856 | struct ahc_devinfo devinfo; |
1857 | u_int tags; | |
1da177e4 | 1858 | |
cb624029 JB |
1859 | ahc_compile_devinfo(&devinfo, |
1860 | dev->target->channel == 0 | |
1861 | ? ahc->our_id : ahc->our_id_b, | |
1862 | dev->target->target, dev->lun, | |
1863 | dev->target->channel == 0 ? 'A' : 'B', | |
1864 | ROLE_INITIATOR); | |
1865 | tags = ahc_linux_user_tagdepth(ahc, &devinfo); | |
1866 | if (tags != 0 | |
1867 | && dev->scsi_device != NULL | |
1868 | && dev->scsi_device->tagged_supported != 0) { | |
1da177e4 | 1869 | |
cb624029 JB |
1870 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED); |
1871 | ahc_print_devinfo(ahc, &devinfo); | |
1872 | printf("Tagged Queuing enabled. Depth %d\n", tags); | |
1da177e4 | 1873 | } else { |
cb624029 | 1874 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE); |
1da177e4 LT |
1875 | } |
1876 | } | |
1877 | ||
e4e360c3 JB |
1878 | static int |
1879 | ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, | |
1880 | struct scsi_cmnd *cmd) | |
1da177e4 | 1881 | { |
cb624029 JB |
1882 | struct scb *scb; |
1883 | struct hardware_scb *hscb; | |
1884 | struct ahc_initiator_tinfo *tinfo; | |
1885 | struct ahc_tmode_tstate *tstate; | |
1886 | uint16_t mask; | |
e4e360c3 | 1887 | struct scb_tailq *untagged_q = NULL; |
1da177e4 | 1888 | |
e4e360c3 JB |
1889 | /* |
1890 | * Schedule us to run later. The only reason we are not | |
1891 | * running is because the whole controller Q is frozen. | |
1892 | */ | |
1893 | if (ahc->platform_data->qfrozen != 0) | |
1894 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 1895 | |
e4e360c3 JB |
1896 | /* |
1897 | * We only allow one untagged transaction | |
1898 | * per target in the initiator role unless | |
1899 | * we are storing a full busy target *lun* | |
1900 | * table in SCB space. | |
1901 | */ | |
1902 | if (!blk_rq_tagged(cmd->request) | |
1903 | && (ahc->features & AHC_SCB_BTT) == 0) { | |
1904 | int target_offset; | |
1da177e4 | 1905 | |
e4e360c3 JB |
1906 | target_offset = cmd->device->id + cmd->device->channel * 8; |
1907 | untagged_q = &(ahc->untagged_queues[target_offset]); | |
1908 | if (!TAILQ_EMPTY(untagged_q)) | |
1909 | /* if we're already executing an untagged command | |
1910 | * we're busy to another */ | |
1911 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1912 | } | |
1913 | ||
1914 | /* | |
1915 | * Get an scb to use. | |
1916 | */ | |
1917 | if ((scb = ahc_get_scb(ahc)) == NULL) { | |
cb624029 | 1918 | ahc->flags |= AHC_RESOURCE_SHORTAGE; |
e4e360c3 JB |
1919 | return SCSI_MLQUEUE_HOST_BUSY; |
1920 | } | |
1da177e4 | 1921 | |
e4e360c3 JB |
1922 | scb->io_ctx = cmd; |
1923 | scb->platform_data->dev = dev; | |
1924 | hscb = scb->hscb; | |
1925 | cmd->host_scribble = (char *)scb; | |
1da177e4 | 1926 | |
e4e360c3 JB |
1927 | /* |
1928 | * Fill out basics of the HSCB. | |
1929 | */ | |
1930 | hscb->control = 0; | |
1931 | hscb->scsiid = BUILD_SCSIID(ahc, cmd); | |
1932 | hscb->lun = cmd->device->lun; | |
1933 | mask = SCB_GET_TARGET_MASK(ahc, scb); | |
1934 | tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), | |
1935 | SCB_GET_OUR_ID(scb), | |
1936 | SCB_GET_TARGET(ahc, scb), &tstate); | |
1937 | hscb->scsirate = tinfo->scsirate; | |
1938 | hscb->scsioffset = tinfo->curr.offset; | |
1939 | if ((tstate->ultraenb & mask) != 0) | |
1940 | hscb->control |= ULTRAENB; | |
1941 | ||
1942 | if ((ahc->user_discenable & mask) != 0) | |
1943 | hscb->control |= DISCENB; | |
1944 | ||
1945 | if ((tstate->auto_negotiate & mask) != 0) { | |
1946 | scb->flags |= SCB_AUTO_NEGOTIATE; | |
1947 | scb->hscb->control |= MK_MESSAGE; | |
1948 | } | |
1949 | ||
1950 | if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { | |
cb624029 | 1951 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
e4e360c3 JB |
1952 | int msg_bytes; |
1953 | uint8_t tag_msgs[2]; | |
1954 | ||
1955 | msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); | |
1956 | if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { | |
1957 | hscb->control |= tag_msgs[0]; | |
1958 | if (tag_msgs[0] == MSG_ORDERED_TASK) | |
cb624029 | 1959 | dev->commands_since_idle_or_otag = 0; |
e4e360c3 JB |
1960 | } else |
1961 | #endif | |
1962 | if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH | |
1963 | && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { | |
1964 | hscb->control |= MSG_ORDERED_TASK; | |
1965 | dev->commands_since_idle_or_otag = 0; | |
cb624029 | 1966 | } else { |
e4e360c3 | 1967 | hscb->control |= MSG_SIMPLE_TASK; |
cb624029 | 1968 | } |
e4e360c3 | 1969 | } |
1da177e4 | 1970 | |
e4e360c3 JB |
1971 | hscb->cdb_len = cmd->cmd_len; |
1972 | if (hscb->cdb_len <= 12) { | |
1973 | memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); | |
1974 | } else { | |
1975 | memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); | |
1976 | scb->flags |= SCB_CDB32_PTR; | |
1977 | } | |
1da177e4 | 1978 | |
e4e360c3 JB |
1979 | scb->platform_data->xfer_len = 0; |
1980 | ahc_set_residual(scb, 0); | |
1981 | ahc_set_sense_residual(scb, 0); | |
1982 | scb->sg_count = 0; | |
1983 | if (cmd->use_sg != 0) { | |
1984 | struct ahc_dma_seg *sg; | |
1985 | struct scatterlist *cur_seg; | |
1986 | struct scatterlist *end_seg; | |
1987 | int nseg; | |
1988 | ||
1989 | cur_seg = (struct scatterlist *)cmd->request_buffer; | |
1990 | nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg, | |
1991 | cmd->sc_data_direction); | |
1992 | end_seg = cur_seg + nseg; | |
1993 | /* Copy the segments into the SG list. */ | |
1994 | sg = scb->sg_list; | |
1995 | /* | |
1996 | * The sg_count may be larger than nseg if | |
1997 | * a transfer crosses a 32bit page. | |
1998 | */ | |
1999 | while (cur_seg < end_seg) { | |
1da177e4 | 2000 | dma_addr_t addr; |
e4e360c3 JB |
2001 | bus_size_t len; |
2002 | int consumed; | |
2003 | ||
2004 | addr = sg_dma_address(cur_seg); | |
2005 | len = sg_dma_len(cur_seg); | |
2006 | consumed = ahc_linux_map_seg(ahc, scb, | |
2007 | sg, addr, len); | |
2008 | sg += consumed; | |
2009 | scb->sg_count += consumed; | |
2010 | cur_seg++; | |
1da177e4 | 2011 | } |
e4e360c3 JB |
2012 | sg--; |
2013 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); | |
1da177e4 | 2014 | |
e4e360c3 JB |
2015 | /* |
2016 | * Reset the sg list pointer. | |
2017 | */ | |
2018 | scb->hscb->sgptr = | |
2019 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); | |
2020 | ||
2021 | /* | |
2022 | * Copy the first SG into the "current" | |
2023 | * data pointer area. | |
2024 | */ | |
2025 | scb->hscb->dataptr = scb->sg_list->addr; | |
2026 | scb->hscb->datacnt = scb->sg_list->len; | |
2027 | } else if (cmd->request_bufflen != 0) { | |
2028 | struct ahc_dma_seg *sg; | |
2029 | dma_addr_t addr; | |
2030 | ||
2031 | sg = scb->sg_list; | |
2032 | addr = pci_map_single(ahc->dev_softc, | |
2033 | cmd->request_buffer, | |
2034 | cmd->request_bufflen, | |
2035 | cmd->sc_data_direction); | |
2036 | scb->platform_data->buf_busaddr = addr; | |
2037 | scb->sg_count = ahc_linux_map_seg(ahc, scb, | |
2038 | sg, addr, | |
2039 | cmd->request_bufflen); | |
2040 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); | |
1da177e4 LT |
2041 | |
2042 | /* | |
e4e360c3 | 2043 | * Reset the sg list pointer. |
1da177e4 | 2044 | */ |
e4e360c3 JB |
2045 | scb->hscb->sgptr = |
2046 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); | |
2047 | ||
2048 | /* | |
2049 | * Copy the first SG into the "current" | |
2050 | * data pointer area. | |
2051 | */ | |
2052 | scb->hscb->dataptr = sg->addr; | |
2053 | scb->hscb->datacnt = sg->len; | |
2054 | } else { | |
2055 | scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); | |
2056 | scb->hscb->dataptr = 0; | |
2057 | scb->hscb->datacnt = 0; | |
2058 | scb->sg_count = 0; | |
2059 | } | |
2060 | ||
2061 | LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); | |
2062 | dev->openings--; | |
2063 | dev->active++; | |
2064 | dev->commands_issued++; | |
2065 | if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) | |
2066 | dev->commands_since_idle_or_otag++; | |
2067 | ||
2068 | scb->flags |= SCB_ACTIVE; | |
2069 | if (untagged_q) { | |
2070 | TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); | |
2071 | scb->flags |= SCB_UNTAGGEDQ; | |
1da177e4 | 2072 | } |
e4e360c3 JB |
2073 | ahc_queue_scb(ahc, scb); |
2074 | return 0; | |
1da177e4 LT |
2075 | } |
2076 | ||
2077 | /* | |
2078 | * SCSI controller interrupt handler. | |
2079 | */ | |
2080 | irqreturn_t | |
2081 | ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs) | |
2082 | { | |
2083 | struct ahc_softc *ahc; | |
2084 | u_long flags; | |
2085 | int ours; | |
2086 | ||
2087 | ahc = (struct ahc_softc *) dev_id; | |
2088 | ahc_lock(ahc, &flags); | |
2089 | ours = ahc_intr(ahc); | |
1da177e4 LT |
2090 | ahc_linux_run_complete_queue(ahc); |
2091 | ahc_unlock(ahc, &flags); | |
2092 | return IRQ_RETVAL(ours); | |
2093 | } | |
2094 | ||
2095 | void | |
2096 | ahc_platform_flushwork(struct ahc_softc *ahc) | |
2097 | { | |
2098 | ||
2099 | while (ahc_linux_run_complete_queue(ahc) != NULL) | |
2100 | ; | |
2101 | } | |
2102 | ||
2103 | static struct ahc_linux_target* | |
2104 | ahc_linux_alloc_target(struct ahc_softc *ahc, u_int channel, u_int target) | |
2105 | { | |
2106 | struct ahc_linux_target *targ; | |
2107 | u_int target_offset; | |
2108 | ||
2109 | target_offset = target; | |
2110 | if (channel != 0) | |
2111 | target_offset += 8; | |
2112 | ||
2113 | targ = malloc(sizeof(*targ), M_DEVBUG, M_NOWAIT); | |
2114 | if (targ == NULL) | |
2115 | return (NULL); | |
2116 | memset(targ, 0, sizeof(*targ)); | |
2117 | targ->channel = channel; | |
2118 | targ->target = target; | |
2119 | targ->ahc = ahc; | |
1da177e4 LT |
2120 | ahc->platform_data->targets[target_offset] = targ; |
2121 | return (targ); | |
2122 | } | |
2123 | ||
2124 | static void | |
2125 | ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ) | |
2126 | { | |
2127 | struct ahc_devinfo devinfo; | |
2128 | struct ahc_initiator_tinfo *tinfo; | |
2129 | struct ahc_tmode_tstate *tstate; | |
2130 | u_int our_id; | |
2131 | u_int target_offset; | |
2132 | char channel; | |
2133 | ||
2134 | /* | |
2135 | * Force a negotiation to async/narrow on any | |
2136 | * future command to this device unless a bus | |
2137 | * reset occurs between now and that command. | |
2138 | */ | |
2139 | channel = 'A' + targ->channel; | |
2140 | our_id = ahc->our_id; | |
2141 | target_offset = targ->target; | |
2142 | if (targ->channel != 0) { | |
2143 | target_offset += 8; | |
2144 | our_id = ahc->our_id_b; | |
2145 | } | |
2146 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, | |
2147 | targ->target, &tstate); | |
2148 | ahc_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD, | |
2149 | channel, ROLE_INITIATOR); | |
2150 | ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, | |
2151 | AHC_TRANS_GOAL, /*paused*/FALSE); | |
2152 | ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, | |
2153 | AHC_TRANS_GOAL, /*paused*/FALSE); | |
2154 | ahc_update_neg_request(ahc, &devinfo, tstate, tinfo, AHC_NEG_ALWAYS); | |
2155 | ahc->platform_data->targets[target_offset] = NULL; | |
1da177e4 LT |
2156 | free(targ, M_DEVBUF); |
2157 | } | |
2158 | ||
2159 | static struct ahc_linux_device* | |
2160 | ahc_linux_alloc_device(struct ahc_softc *ahc, | |
2161 | struct ahc_linux_target *targ, u_int lun) | |
2162 | { | |
2163 | struct ahc_linux_device *dev; | |
2164 | ||
2165 | dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT); | |
2166 | if (dev == NULL) | |
2167 | return (NULL); | |
2168 | memset(dev, 0, sizeof(*dev)); | |
2169 | init_timer(&dev->timer); | |
1da177e4 LT |
2170 | dev->flags = AHC_DEV_UNCONFIGURED; |
2171 | dev->lun = lun; | |
2172 | dev->target = targ; | |
2173 | ||
2174 | /* | |
2175 | * We start out life using untagged | |
2176 | * transactions of which we allow one. | |
2177 | */ | |
2178 | dev->openings = 1; | |
2179 | ||
2180 | /* | |
2181 | * Set maxtags to 0. This will be changed if we | |
2182 | * later determine that we are dealing with | |
2183 | * a tagged queuing capable device. | |
2184 | */ | |
2185 | dev->maxtags = 0; | |
2186 | ||
2187 | targ->refcount++; | |
2188 | targ->devices[lun] = dev; | |
2189 | return (dev); | |
2190 | } | |
2191 | ||
2192 | static void | |
2193 | __ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev) | |
2194 | { | |
2195 | struct ahc_linux_target *targ; | |
2196 | ||
2197 | targ = dev->target; | |
2198 | targ->devices[dev->lun] = NULL; | |
2199 | free(dev, M_DEVBUF); | |
2200 | targ->refcount--; | |
cb624029 | 2201 | if (targ->refcount == 0) |
1da177e4 LT |
2202 | ahc_linux_free_target(ahc, targ); |
2203 | } | |
2204 | ||
2205 | static void | |
2206 | ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev) | |
2207 | { | |
2208 | del_timer_sync(&dev->timer); | |
2209 | __ahc_linux_free_device(ahc, dev); | |
2210 | } | |
2211 | ||
2212 | void | |
2213 | ahc_send_async(struct ahc_softc *ahc, char channel, | |
2214 | u_int target, u_int lun, ac_code code, void *arg) | |
2215 | { | |
2216 | switch (code) { | |
2217 | case AC_TRANSFER_NEG: | |
2218 | { | |
2219 | char buf[80]; | |
2220 | struct ahc_linux_target *targ; | |
2221 | struct info_str info; | |
2222 | struct ahc_initiator_tinfo *tinfo; | |
2223 | struct ahc_tmode_tstate *tstate; | |
2224 | int target_offset; | |
2225 | ||
2226 | info.buffer = buf; | |
2227 | info.length = sizeof(buf); | |
2228 | info.offset = 0; | |
2229 | info.pos = 0; | |
2230 | tinfo = ahc_fetch_transinfo(ahc, channel, | |
2231 | channel == 'A' ? ahc->our_id | |
2232 | : ahc->our_id_b, | |
2233 | target, &tstate); | |
2234 | ||
2235 | /* | |
2236 | * Don't bother reporting results while | |
2237 | * negotiations are still pending. | |
2238 | */ | |
2239 | if (tinfo->curr.period != tinfo->goal.period | |
2240 | || tinfo->curr.width != tinfo->goal.width | |
2241 | || tinfo->curr.offset != tinfo->goal.offset | |
2242 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options) | |
2243 | if (bootverbose == 0) | |
2244 | break; | |
2245 | ||
2246 | /* | |
2247 | * Don't bother reporting results that | |
2248 | * are identical to those last reported. | |
2249 | */ | |
2250 | target_offset = target; | |
2251 | if (channel == 'B') | |
2252 | target_offset += 8; | |
2253 | targ = ahc->platform_data->targets[target_offset]; | |
2254 | if (targ == NULL) | |
2255 | break; | |
2256 | if (tinfo->curr.period == targ->last_tinfo.period | |
2257 | && tinfo->curr.width == targ->last_tinfo.width | |
2258 | && tinfo->curr.offset == targ->last_tinfo.offset | |
2259 | && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options) | |
2260 | if (bootverbose == 0) | |
2261 | break; | |
2262 | ||
2263 | targ->last_tinfo.period = tinfo->curr.period; | |
2264 | targ->last_tinfo.width = tinfo->curr.width; | |
2265 | targ->last_tinfo.offset = tinfo->curr.offset; | |
2266 | targ->last_tinfo.ppr_options = tinfo->curr.ppr_options; | |
2267 | ||
2268 | printf("(%s:%c:", ahc_name(ahc), channel); | |
2269 | if (target == CAM_TARGET_WILDCARD) | |
2270 | printf("*): "); | |
2271 | else | |
2272 | printf("%d): ", target); | |
2273 | ahc_format_transinfo(&info, &tinfo->curr); | |
2274 | if (info.pos < info.length) | |
2275 | *info.buffer = '\0'; | |
2276 | else | |
2277 | buf[info.length - 1] = '\0'; | |
2278 | printf("%s", buf); | |
2279 | break; | |
2280 | } | |
2281 | case AC_SENT_BDR: | |
2282 | { | |
2283 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
2284 | WARN_ON(lun != CAM_LUN_WILDCARD); | |
2285 | scsi_report_device_reset(ahc->platform_data->host, | |
2286 | channel - 'A', target); | |
2287 | #else | |
2288 | Scsi_Device *scsi_dev; | |
2289 | ||
2290 | /* | |
2291 | * Find the SCSI device associated with this | |
2292 | * request and indicate that a UA is expected. | |
2293 | */ | |
2294 | for (scsi_dev = ahc->platform_data->host->host_queue; | |
2295 | scsi_dev != NULL; scsi_dev = scsi_dev->next) { | |
2296 | if (channel - 'A' == scsi_dev->channel | |
2297 | && target == scsi_dev->id | |
2298 | && (lun == CAM_LUN_WILDCARD | |
2299 | || lun == scsi_dev->lun)) { | |
2300 | scsi_dev->was_reset = 1; | |
2301 | scsi_dev->expecting_cc_ua = 1; | |
2302 | } | |
2303 | } | |
2304 | #endif | |
2305 | break; | |
2306 | } | |
2307 | case AC_BUS_RESET: | |
2308 | if (ahc->platform_data->host != NULL) { | |
2309 | scsi_report_bus_reset(ahc->platform_data->host, | |
2310 | channel - 'A'); | |
2311 | } | |
2312 | break; | |
2313 | default: | |
2314 | panic("ahc_send_async: Unexpected async event"); | |
2315 | } | |
2316 | } | |
2317 | ||
2318 | /* | |
2319 | * Calls the higher level scsi done function and frees the scb. | |
2320 | */ | |
2321 | void | |
2322 | ahc_done(struct ahc_softc *ahc, struct scb *scb) | |
2323 | { | |
2324 | Scsi_Cmnd *cmd; | |
2325 | struct ahc_linux_device *dev; | |
2326 | ||
2327 | LIST_REMOVE(scb, pending_links); | |
2328 | if ((scb->flags & SCB_UNTAGGEDQ) != 0) { | |
2329 | struct scb_tailq *untagged_q; | |
2330 | int target_offset; | |
2331 | ||
2332 | target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); | |
2333 | untagged_q = &(ahc->untagged_queues[target_offset]); | |
2334 | TAILQ_REMOVE(untagged_q, scb, links.tqe); | |
e4e360c3 | 2335 | BUG_ON(!TAILQ_EMPTY(untagged_q)); |
1da177e4 LT |
2336 | } |
2337 | ||
2338 | if ((scb->flags & SCB_ACTIVE) == 0) { | |
2339 | printf("SCB %d done'd twice\n", scb->hscb->tag); | |
2340 | ahc_dump_card_state(ahc); | |
2341 | panic("Stopping for safety"); | |
2342 | } | |
2343 | cmd = scb->io_ctx; | |
2344 | dev = scb->platform_data->dev; | |
2345 | dev->active--; | |
2346 | dev->openings++; | |
2347 | if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { | |
2348 | cmd->result &= ~(CAM_DEV_QFRZN << 16); | |
2349 | dev->qfrozen--; | |
2350 | } | |
2351 | ahc_linux_unmap_scb(ahc, scb); | |
2352 | ||
2353 | /* | |
2354 | * Guard against stale sense data. | |
2355 | * The Linux mid-layer assumes that sense | |
2356 | * was retrieved anytime the first byte of | |
2357 | * the sense buffer looks "sane". | |
2358 | */ | |
2359 | cmd->sense_buffer[0] = 0; | |
2360 | if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { | |
2361 | uint32_t amount_xferred; | |
2362 | ||
2363 | amount_xferred = | |
2364 | ahc_get_transfer_length(scb) - ahc_get_residual(scb); | |
2365 | if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { | |
2366 | #ifdef AHC_DEBUG | |
2367 | if ((ahc_debug & AHC_SHOW_MISC) != 0) { | |
2368 | ahc_print_path(ahc, scb); | |
2369 | printf("Set CAM_UNCOR_PARITY\n"); | |
2370 | } | |
2371 | #endif | |
2372 | ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); | |
2373 | #ifdef AHC_REPORT_UNDERFLOWS | |
2374 | /* | |
2375 | * This code is disabled by default as some | |
2376 | * clients of the SCSI system do not properly | |
2377 | * initialize the underflow parameter. This | |
2378 | * results in spurious termination of commands | |
2379 | * that complete as expected (e.g. underflow is | |
2380 | * allowed as command can return variable amounts | |
2381 | * of data. | |
2382 | */ | |
2383 | } else if (amount_xferred < scb->io_ctx->underflow) { | |
2384 | u_int i; | |
2385 | ||
2386 | ahc_print_path(ahc, scb); | |
2387 | printf("CDB:"); | |
2388 | for (i = 0; i < scb->io_ctx->cmd_len; i++) | |
2389 | printf(" 0x%x", scb->io_ctx->cmnd[i]); | |
2390 | printf("\n"); | |
2391 | ahc_print_path(ahc, scb); | |
2392 | printf("Saw underflow (%ld of %ld bytes). " | |
2393 | "Treated as error\n", | |
2394 | ahc_get_residual(scb), | |
2395 | ahc_get_transfer_length(scb)); | |
2396 | ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); | |
2397 | #endif | |
2398 | } else { | |
2399 | ahc_set_transaction_status(scb, CAM_REQ_CMP); | |
2400 | } | |
2401 | } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { | |
2402 | ahc_linux_handle_scsi_status(ahc, dev, scb); | |
2403 | } else if (ahc_get_transaction_status(scb) == CAM_SEL_TIMEOUT) { | |
2404 | dev->flags |= AHC_DEV_UNCONFIGURED; | |
1da177e4 | 2405 | } |
1da177e4 LT |
2406 | |
2407 | if (dev->openings == 1 | |
2408 | && ahc_get_transaction_status(scb) == CAM_REQ_CMP | |
2409 | && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) | |
2410 | dev->tag_success_count++; | |
2411 | /* | |
2412 | * Some devices deal with temporary internal resource | |
2413 | * shortages by returning queue full. When the queue | |
2414 | * full occurrs, we throttle back. Slowly try to get | |
2415 | * back to our previous queue depth. | |
2416 | */ | |
2417 | if ((dev->openings + dev->active) < dev->maxtags | |
2418 | && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { | |
2419 | dev->tag_success_count = 0; | |
2420 | dev->openings++; | |
2421 | } | |
2422 | ||
2423 | if (dev->active == 0) | |
2424 | dev->commands_since_idle_or_otag = 0; | |
2425 | ||
e4e360c3 JB |
2426 | if ((dev->flags & AHC_DEV_UNCONFIGURED) != 0 |
2427 | && dev->active == 0 | |
2428 | && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0) | |
2429 | ahc_linux_free_device(ahc, dev); | |
2430 | else if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) { | |
1da177e4 LT |
2431 | TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links); |
2432 | dev->flags |= AHC_DEV_ON_RUN_LIST; | |
2433 | } | |
2434 | ||
2435 | if ((scb->flags & SCB_RECOVERY_SCB) != 0) { | |
2436 | printf("Recovery SCB completes\n"); | |
2437 | if (ahc_get_transaction_status(scb) == CAM_BDR_SENT | |
2438 | || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) | |
2439 | ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); | |
2440 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { | |
2441 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; | |
2442 | up(&ahc->platform_data->eh_sem); | |
2443 | } | |
2444 | } | |
2445 | ||
2446 | ahc_free_scb(ahc, scb); | |
2447 | ahc_linux_queue_cmd_complete(ahc, cmd); | |
1da177e4 LT |
2448 | } |
2449 | ||
2450 | static void | |
2451 | ahc_linux_handle_scsi_status(struct ahc_softc *ahc, | |
2452 | struct ahc_linux_device *dev, struct scb *scb) | |
2453 | { | |
2454 | struct ahc_devinfo devinfo; | |
2455 | ||
2456 | ahc_compile_devinfo(&devinfo, | |
2457 | ahc->our_id, | |
2458 | dev->target->target, dev->lun, | |
2459 | dev->target->channel == 0 ? 'A' : 'B', | |
2460 | ROLE_INITIATOR); | |
2461 | ||
2462 | /* | |
2463 | * We don't currently trust the mid-layer to | |
2464 | * properly deal with queue full or busy. So, | |
2465 | * when one occurs, we tell the mid-layer to | |
2466 | * unconditionally requeue the command to us | |
2467 | * so that we can retry it ourselves. We also | |
2468 | * implement our own throttling mechanism so | |
2469 | * we don't clobber the device with too many | |
2470 | * commands. | |
2471 | */ | |
2472 | switch (ahc_get_scsi_status(scb)) { | |
2473 | default: | |
2474 | break; | |
2475 | case SCSI_STATUS_CHECK_COND: | |
2476 | case SCSI_STATUS_CMD_TERMINATED: | |
2477 | { | |
2478 | Scsi_Cmnd *cmd; | |
2479 | ||
2480 | /* | |
2481 | * Copy sense information to the OS's cmd | |
2482 | * structure if it is available. | |
2483 | */ | |
2484 | cmd = scb->io_ctx; | |
2485 | if (scb->flags & SCB_SENSE) { | |
2486 | u_int sense_size; | |
2487 | ||
2488 | sense_size = MIN(sizeof(struct scsi_sense_data) | |
2489 | - ahc_get_sense_residual(scb), | |
2490 | sizeof(cmd->sense_buffer)); | |
2491 | memcpy(cmd->sense_buffer, | |
2492 | ahc_get_sense_buf(ahc, scb), sense_size); | |
2493 | if (sense_size < sizeof(cmd->sense_buffer)) | |
2494 | memset(&cmd->sense_buffer[sense_size], 0, | |
2495 | sizeof(cmd->sense_buffer) - sense_size); | |
2496 | cmd->result |= (DRIVER_SENSE << 24); | |
2497 | #ifdef AHC_DEBUG | |
2498 | if (ahc_debug & AHC_SHOW_SENSE) { | |
2499 | int i; | |
2500 | ||
2501 | printf("Copied %d bytes of sense data:", | |
2502 | sense_size); | |
2503 | for (i = 0; i < sense_size; i++) { | |
2504 | if ((i & 0xF) == 0) | |
2505 | printf("\n"); | |
2506 | printf("0x%x ", cmd->sense_buffer[i]); | |
2507 | } | |
2508 | printf("\n"); | |
2509 | } | |
2510 | #endif | |
2511 | } | |
2512 | break; | |
2513 | } | |
2514 | case SCSI_STATUS_QUEUE_FULL: | |
2515 | { | |
2516 | /* | |
2517 | * By the time the core driver has returned this | |
2518 | * command, all other commands that were queued | |
2519 | * to us but not the device have been returned. | |
2520 | * This ensures that dev->active is equal to | |
2521 | * the number of commands actually queued to | |
2522 | * the device. | |
2523 | */ | |
2524 | dev->tag_success_count = 0; | |
2525 | if (dev->active != 0) { | |
2526 | /* | |
2527 | * Drop our opening count to the number | |
2528 | * of commands currently outstanding. | |
2529 | */ | |
2530 | dev->openings = 0; | |
2531 | /* | |
2532 | ahc_print_path(ahc, scb); | |
2533 | printf("Dropping tag count to %d\n", dev->active); | |
2534 | */ | |
2535 | if (dev->active == dev->tags_on_last_queuefull) { | |
2536 | ||
2537 | dev->last_queuefull_same_count++; | |
2538 | /* | |
2539 | * If we repeatedly see a queue full | |
2540 | * at the same queue depth, this | |
2541 | * device has a fixed number of tag | |
2542 | * slots. Lock in this tag depth | |
2543 | * so we stop seeing queue fulls from | |
2544 | * this device. | |
2545 | */ | |
2546 | if (dev->last_queuefull_same_count | |
2547 | == AHC_LOCK_TAGS_COUNT) { | |
2548 | dev->maxtags = dev->active; | |
2549 | ahc_print_path(ahc, scb); | |
2550 | printf("Locking max tag count at %d\n", | |
2551 | dev->active); | |
2552 | } | |
2553 | } else { | |
2554 | dev->tags_on_last_queuefull = dev->active; | |
2555 | dev->last_queuefull_same_count = 0; | |
2556 | } | |
2557 | ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); | |
2558 | ahc_set_scsi_status(scb, SCSI_STATUS_OK); | |
2559 | ahc_platform_set_tags(ahc, &devinfo, | |
2560 | (dev->flags & AHC_DEV_Q_BASIC) | |
2561 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | |
2562 | break; | |
2563 | } | |
2564 | /* | |
2565 | * Drop down to a single opening, and treat this | |
2566 | * as if the target returned BUSY SCSI status. | |
2567 | */ | |
2568 | dev->openings = 1; | |
2569 | ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); | |
2570 | ahc_platform_set_tags(ahc, &devinfo, | |
2571 | (dev->flags & AHC_DEV_Q_BASIC) | |
2572 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | |
2573 | /* FALLTHROUGH */ | |
2574 | } | |
2575 | case SCSI_STATUS_BUSY: | |
2576 | { | |
2577 | /* | |
2578 | * Set a short timer to defer sending commands for | |
2579 | * a bit since Linux will not delay in this case. | |
2580 | */ | |
2581 | if ((dev->flags & AHC_DEV_TIMER_ACTIVE) != 0) { | |
2582 | printf("%s:%c:%d: Device Timer still active during " | |
2583 | "busy processing\n", ahc_name(ahc), | |
2584 | dev->target->channel, dev->target->target); | |
2585 | break; | |
2586 | } | |
2587 | dev->flags |= AHC_DEV_TIMER_ACTIVE; | |
2588 | dev->qfrozen++; | |
2589 | init_timer(&dev->timer); | |
2590 | dev->timer.data = (u_long)dev; | |
2591 | dev->timer.expires = jiffies + (HZ/2); | |
2592 | dev->timer.function = ahc_linux_dev_timed_unfreeze; | |
2593 | add_timer(&dev->timer); | |
2594 | break; | |
2595 | } | |
2596 | } | |
2597 | } | |
2598 | ||
2599 | static void | |
2600 | ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd) | |
2601 | { | |
2602 | /* | |
2603 | * Typically, the complete queue has very few entries | |
2604 | * queued to it before the queue is emptied by | |
2605 | * ahc_linux_run_complete_queue, so sorting the entries | |
2606 | * by generation number should be inexpensive. | |
2607 | * We perform the sort so that commands that complete | |
2608 | * with an error are retuned in the order origionally | |
2609 | * queued to the controller so that any subsequent retries | |
2610 | * are performed in order. The underlying ahc routines do | |
2611 | * not guarantee the order that aborted commands will be | |
2612 | * returned to us. | |
2613 | */ | |
2614 | struct ahc_completeq *completeq; | |
2615 | struct ahc_cmd *list_cmd; | |
2616 | struct ahc_cmd *acmd; | |
2617 | ||
2618 | /* | |
2619 | * Map CAM error codes into Linux Error codes. We | |
2620 | * avoid the conversion so that the DV code has the | |
2621 | * full error information available when making | |
2622 | * state change decisions. | |
2623 | */ | |
cb624029 | 2624 | { |
1da177e4 LT |
2625 | u_int new_status; |
2626 | ||
2627 | switch (ahc_cmd_get_transaction_status(cmd)) { | |
2628 | case CAM_REQ_INPROG: | |
2629 | case CAM_REQ_CMP: | |
2630 | case CAM_SCSI_STATUS_ERROR: | |
2631 | new_status = DID_OK; | |
2632 | break; | |
2633 | case CAM_REQ_ABORTED: | |
2634 | new_status = DID_ABORT; | |
2635 | break; | |
2636 | case CAM_BUSY: | |
2637 | new_status = DID_BUS_BUSY; | |
2638 | break; | |
2639 | case CAM_REQ_INVALID: | |
2640 | case CAM_PATH_INVALID: | |
2641 | new_status = DID_BAD_TARGET; | |
2642 | break; | |
2643 | case CAM_SEL_TIMEOUT: | |
2644 | new_status = DID_NO_CONNECT; | |
2645 | break; | |
2646 | case CAM_SCSI_BUS_RESET: | |
2647 | case CAM_BDR_SENT: | |
2648 | new_status = DID_RESET; | |
2649 | break; | |
2650 | case CAM_UNCOR_PARITY: | |
2651 | new_status = DID_PARITY; | |
2652 | break; | |
2653 | case CAM_CMD_TIMEOUT: | |
2654 | new_status = DID_TIME_OUT; | |
2655 | break; | |
2656 | case CAM_UA_ABORT: | |
2657 | case CAM_REQ_CMP_ERR: | |
2658 | case CAM_AUTOSENSE_FAIL: | |
2659 | case CAM_NO_HBA: | |
2660 | case CAM_DATA_RUN_ERR: | |
2661 | case CAM_UNEXP_BUSFREE: | |
2662 | case CAM_SEQUENCE_FAIL: | |
2663 | case CAM_CCB_LEN_ERR: | |
2664 | case CAM_PROVIDE_FAIL: | |
2665 | case CAM_REQ_TERMIO: | |
2666 | case CAM_UNREC_HBA_ERROR: | |
2667 | case CAM_REQ_TOO_BIG: | |
2668 | new_status = DID_ERROR; | |
2669 | break; | |
2670 | case CAM_REQUEUE_REQ: | |
2671 | /* | |
2672 | * If we want the request requeued, make sure there | |
2673 | * are sufficent retries. In the old scsi error code, | |
2674 | * we used to be able to specify a result code that | |
2675 | * bypassed the retry count. Now we must use this | |
2676 | * hack. We also "fake" a check condition with | |
2677 | * a sense code of ABORTED COMMAND. This seems to | |
2678 | * evoke a retry even if this command is being sent | |
2679 | * via the eh thread. Ick! Ick! Ick! | |
2680 | */ | |
2681 | if (cmd->retries > 0) | |
2682 | cmd->retries--; | |
2683 | new_status = DID_OK; | |
2684 | ahc_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND); | |
2685 | cmd->result |= (DRIVER_SENSE << 24); | |
2686 | memset(cmd->sense_buffer, 0, | |
2687 | sizeof(cmd->sense_buffer)); | |
2688 | cmd->sense_buffer[0] = SSD_ERRCODE_VALID | |
2689 | | SSD_CURRENT_ERROR; | |
2690 | cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND; | |
2691 | break; | |
2692 | default: | |
2693 | /* We should never get here */ | |
2694 | new_status = DID_ERROR; | |
2695 | break; | |
2696 | } | |
2697 | ||
2698 | ahc_cmd_set_transaction_status(cmd, new_status); | |
2699 | } | |
2700 | ||
2701 | completeq = &ahc->platform_data->completeq; | |
2702 | list_cmd = TAILQ_FIRST(completeq); | |
2703 | acmd = (struct ahc_cmd *)cmd; | |
2704 | while (list_cmd != NULL | |
2705 | && acmd_scsi_cmd(list_cmd).serial_number | |
2706 | < acmd_scsi_cmd(acmd).serial_number) | |
2707 | list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe); | |
2708 | if (list_cmd != NULL) | |
2709 | TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe); | |
2710 | else | |
2711 | TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe); | |
2712 | } | |
2713 | ||
1da177e4 LT |
2714 | static void |
2715 | ahc_linux_sem_timeout(u_long arg) | |
2716 | { | |
2717 | struct ahc_softc *ahc; | |
2718 | u_long s; | |
2719 | ||
2720 | ahc = (struct ahc_softc *)arg; | |
2721 | ||
2722 | ahc_lock(ahc, &s); | |
2723 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { | |
2724 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; | |
2725 | up(&ahc->platform_data->eh_sem); | |
2726 | } | |
2727 | ahc_unlock(ahc, &s); | |
2728 | } | |
2729 | ||
2730 | static void | |
2731 | ahc_linux_freeze_simq(struct ahc_softc *ahc) | |
2732 | { | |
2733 | ahc->platform_data->qfrozen++; | |
2734 | if (ahc->platform_data->qfrozen == 1) { | |
2735 | scsi_block_requests(ahc->platform_data->host); | |
2736 | ||
2737 | /* XXX What about Twin channels? */ | |
2738 | ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, | |
2739 | CAM_LUN_WILDCARD, SCB_LIST_NULL, | |
2740 | ROLE_INITIATOR, CAM_REQUEUE_REQ); | |
2741 | } | |
2742 | } | |
2743 | ||
2744 | static void | |
2745 | ahc_linux_release_simq(u_long arg) | |
2746 | { | |
2747 | struct ahc_softc *ahc; | |
2748 | u_long s; | |
2749 | int unblock_reqs; | |
2750 | ||
2751 | ahc = (struct ahc_softc *)arg; | |
2752 | ||
2753 | unblock_reqs = 0; | |
2754 | ahc_lock(ahc, &s); | |
2755 | if (ahc->platform_data->qfrozen > 0) | |
2756 | ahc->platform_data->qfrozen--; | |
2757 | if (ahc->platform_data->qfrozen == 0) | |
2758 | unblock_reqs = 1; | |
1da177e4 LT |
2759 | ahc_unlock(ahc, &s); |
2760 | /* | |
2761 | * There is still a race here. The mid-layer | |
2762 | * should keep its own freeze count and use | |
2763 | * a bottom half handler to run the queues | |
2764 | * so we can unblock with our own lock held. | |
2765 | */ | |
2766 | if (unblock_reqs) | |
2767 | scsi_unblock_requests(ahc->platform_data->host); | |
2768 | } | |
2769 | ||
2770 | static void | |
2771 | ahc_linux_dev_timed_unfreeze(u_long arg) | |
2772 | { | |
2773 | struct ahc_linux_device *dev; | |
2774 | struct ahc_softc *ahc; | |
2775 | u_long s; | |
2776 | ||
2777 | dev = (struct ahc_linux_device *)arg; | |
2778 | ahc = dev->target->ahc; | |
2779 | ahc_lock(ahc, &s); | |
2780 | dev->flags &= ~AHC_DEV_TIMER_ACTIVE; | |
2781 | if (dev->qfrozen > 0) | |
2782 | dev->qfrozen--; | |
e4e360c3 | 2783 | if (dev->active == 0) |
1da177e4 LT |
2784 | __ahc_linux_free_device(ahc, dev); |
2785 | ahc_unlock(ahc, &s); | |
2786 | } | |
2787 | ||
2788 | static int | |
2789 | ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag) | |
2790 | { | |
2791 | struct ahc_softc *ahc; | |
1da177e4 LT |
2792 | struct ahc_linux_device *dev; |
2793 | struct scb *pending_scb; | |
2794 | u_long s; | |
2795 | u_int saved_scbptr; | |
2796 | u_int active_scb_index; | |
2797 | u_int last_phase; | |
2798 | u_int saved_scsiid; | |
2799 | u_int cdb_byte; | |
2800 | int retval; | |
2801 | int was_paused; | |
2802 | int paused; | |
2803 | int wait; | |
2804 | int disconnected; | |
2805 | ||
2806 | pending_scb = NULL; | |
2807 | paused = FALSE; | |
2808 | wait = FALSE; | |
2809 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
1da177e4 LT |
2810 | |
2811 | printf("%s:%d:%d:%d: Attempting to queue a%s message\n", | |
2812 | ahc_name(ahc), cmd->device->channel, | |
2813 | cmd->device->id, cmd->device->lun, | |
2814 | flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); | |
2815 | ||
2816 | printf("CDB:"); | |
2817 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) | |
2818 | printf(" 0x%x", cmd->cmnd[cdb_byte]); | |
2819 | printf("\n"); | |
2820 | ||
2821 | /* | |
2822 | * In all versions of Linux, we have to work around | |
2823 | * a major flaw in how the mid-layer is locked down | |
2824 | * if we are to sleep successfully in our error handler | |
2825 | * while allowing our interrupt handler to run. Since | |
2826 | * the midlayer acquires either the io_request_lock or | |
2827 | * our lock prior to calling us, we must use the | |
2828 | * spin_unlock_irq() method for unlocking our lock. | |
2829 | * This will force interrupts to be enabled on the | |
2830 | * current CPU. Since the EH thread should not have | |
2831 | * been running with CPU interrupts disabled other than | |
2832 | * by acquiring either the io_request_lock or our own | |
2833 | * lock, this *should* be safe. | |
2834 | */ | |
2835 | ahc_midlayer_entrypoint_lock(ahc, &s); | |
2836 | ||
2837 | /* | |
2838 | * First determine if we currently own this command. | |
2839 | * Start by searching the device queue. If not found | |
2840 | * there, check the pending_scb list. If not found | |
2841 | * at all, and the system wanted us to just abort the | |
2842 | * command, return success. | |
2843 | */ | |
2844 | dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id, | |
2845 | cmd->device->lun, /*alloc*/FALSE); | |
2846 | ||
2847 | if (dev == NULL) { | |
2848 | /* | |
2849 | * No target device for this command exists, | |
2850 | * so we must not still own the command. | |
2851 | */ | |
2852 | printf("%s:%d:%d:%d: Is not an active device\n", | |
2853 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2854 | cmd->device->lun); | |
2855 | retval = SUCCESS; | |
2856 | goto no_cmd; | |
2857 | } | |
2858 | ||
1da177e4 LT |
2859 | if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 |
2860 | && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, | |
2861 | cmd->device->channel + 'A', | |
2862 | cmd->device->lun, | |
2863 | CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { | |
2864 | printf("%s:%d:%d:%d: Command found on untagged queue\n", | |
2865 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2866 | cmd->device->lun); | |
2867 | retval = SUCCESS; | |
2868 | goto done; | |
2869 | } | |
2870 | ||
2871 | /* | |
2872 | * See if we can find a matching cmd in the pending list. | |
2873 | */ | |
2874 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | |
2875 | if (pending_scb->io_ctx == cmd) | |
2876 | break; | |
2877 | } | |
2878 | ||
2879 | if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { | |
2880 | ||
2881 | /* Any SCB for this device will do for a target reset */ | |
2882 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | |
2883 | if (ahc_match_scb(ahc, pending_scb, cmd->device->id, | |
2884 | cmd->device->channel + 'A', | |
2885 | CAM_LUN_WILDCARD, | |
2886 | SCB_LIST_NULL, ROLE_INITIATOR) == 0) | |
2887 | break; | |
2888 | } | |
2889 | } | |
2890 | ||
2891 | if (pending_scb == NULL) { | |
2892 | printf("%s:%d:%d:%d: Command not found\n", | |
2893 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2894 | cmd->device->lun); | |
2895 | goto no_cmd; | |
2896 | } | |
2897 | ||
2898 | if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { | |
2899 | /* | |
2900 | * We can't queue two recovery actions using the same SCB | |
2901 | */ | |
2902 | retval = FAILED; | |
2903 | goto done; | |
2904 | } | |
2905 | ||
2906 | /* | |
2907 | * Ensure that the card doesn't do anything | |
2908 | * behind our back and that we didn't "just" miss | |
2909 | * an interrupt that would affect this cmd. | |
2910 | */ | |
2911 | was_paused = ahc_is_paused(ahc); | |
2912 | ahc_pause_and_flushwork(ahc); | |
2913 | paused = TRUE; | |
2914 | ||
2915 | if ((pending_scb->flags & SCB_ACTIVE) == 0) { | |
2916 | printf("%s:%d:%d:%d: Command already completed\n", | |
2917 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2918 | cmd->device->lun); | |
2919 | goto no_cmd; | |
2920 | } | |
2921 | ||
2922 | printf("%s: At time of recovery, card was %spaused\n", | |
2923 | ahc_name(ahc), was_paused ? "" : "not "); | |
2924 | ahc_dump_card_state(ahc); | |
2925 | ||
2926 | disconnected = TRUE; | |
2927 | if (flag == SCB_ABORT) { | |
2928 | if (ahc_search_qinfifo(ahc, cmd->device->id, | |
2929 | cmd->device->channel + 'A', | |
2930 | cmd->device->lun, | |
2931 | pending_scb->hscb->tag, | |
2932 | ROLE_INITIATOR, CAM_REQ_ABORTED, | |
2933 | SEARCH_COMPLETE) > 0) { | |
2934 | printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", | |
2935 | ahc_name(ahc), cmd->device->channel, | |
2936 | cmd->device->id, cmd->device->lun); | |
2937 | retval = SUCCESS; | |
2938 | goto done; | |
2939 | } | |
2940 | } else if (ahc_search_qinfifo(ahc, cmd->device->id, | |
2941 | cmd->device->channel + 'A', | |
2942 | cmd->device->lun, pending_scb->hscb->tag, | |
2943 | ROLE_INITIATOR, /*status*/0, | |
2944 | SEARCH_COUNT) > 0) { | |
2945 | disconnected = FALSE; | |
2946 | } | |
2947 | ||
2948 | if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { | |
2949 | struct scb *bus_scb; | |
2950 | ||
2951 | bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); | |
2952 | if (bus_scb == pending_scb) | |
2953 | disconnected = FALSE; | |
2954 | else if (flag != SCB_ABORT | |
2955 | && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid | |
2956 | && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) | |
2957 | disconnected = FALSE; | |
2958 | } | |
2959 | ||
2960 | /* | |
2961 | * At this point, pending_scb is the scb associated with the | |
2962 | * passed in command. That command is currently active on the | |
2963 | * bus, is in the disconnected state, or we're hoping to find | |
2964 | * a command for the same target active on the bus to abuse to | |
2965 | * send a BDR. Queue the appropriate message based on which of | |
2966 | * these states we are in. | |
2967 | */ | |
2968 | last_phase = ahc_inb(ahc, LASTPHASE); | |
2969 | saved_scbptr = ahc_inb(ahc, SCBPTR); | |
2970 | active_scb_index = ahc_inb(ahc, SCB_TAG); | |
2971 | saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); | |
2972 | if (last_phase != P_BUSFREE | |
2973 | && (pending_scb->hscb->tag == active_scb_index | |
2974 | || (flag == SCB_DEVICE_RESET | |
2975 | && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) { | |
2976 | ||
2977 | /* | |
2978 | * We're active on the bus, so assert ATN | |
2979 | * and hope that the target responds. | |
2980 | */ | |
2981 | pending_scb = ahc_lookup_scb(ahc, active_scb_index); | |
2982 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | |
2983 | ahc_outb(ahc, MSG_OUT, HOST_MSG); | |
2984 | ahc_outb(ahc, SCSISIGO, last_phase|ATNO); | |
2985 | printf("%s:%d:%d:%d: Device is active, asserting ATN\n", | |
2986 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2987 | cmd->device->lun); | |
2988 | wait = TRUE; | |
2989 | } else if (disconnected) { | |
2990 | ||
2991 | /* | |
2992 | * Actually re-queue this SCB in an attempt | |
2993 | * to select the device before it reconnects. | |
2994 | * In either case (selection or reselection), | |
2995 | * we will now issue the approprate message | |
2996 | * to the timed-out device. | |
2997 | * | |
2998 | * Set the MK_MESSAGE control bit indicating | |
2999 | * that we desire to send a message. We | |
3000 | * also set the disconnected flag since | |
3001 | * in the paging case there is no guarantee | |
3002 | * that our SCB control byte matches the | |
3003 | * version on the card. We don't want the | |
3004 | * sequencer to abort the command thinking | |
3005 | * an unsolicited reselection occurred. | |
3006 | */ | |
3007 | pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; | |
3008 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | |
3009 | ||
3010 | /* | |
3011 | * Remove any cached copy of this SCB in the | |
3012 | * disconnected list in preparation for the | |
3013 | * queuing of our abort SCB. We use the | |
3014 | * same element in the SCB, SCB_NEXT, for | |
3015 | * both the qinfifo and the disconnected list. | |
3016 | */ | |
3017 | ahc_search_disc_list(ahc, cmd->device->id, | |
3018 | cmd->device->channel + 'A', | |
3019 | cmd->device->lun, pending_scb->hscb->tag, | |
3020 | /*stop_on_first*/TRUE, | |
3021 | /*remove*/TRUE, | |
3022 | /*save_state*/FALSE); | |
3023 | ||
3024 | /* | |
3025 | * In the non-paging case, the sequencer will | |
3026 | * never re-reference the in-core SCB. | |
3027 | * To make sure we are notified during | |
3028 | * reslection, set the MK_MESSAGE flag in | |
3029 | * the card's copy of the SCB. | |
3030 | */ | |
3031 | if ((ahc->flags & AHC_PAGESCBS) == 0) { | |
3032 | ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); | |
3033 | ahc_outb(ahc, SCB_CONTROL, | |
3034 | ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); | |
3035 | } | |
3036 | ||
3037 | /* | |
3038 | * Clear out any entries in the QINFIFO first | |
3039 | * so we are the next SCB for this target | |
3040 | * to run. | |
3041 | */ | |
3042 | ahc_search_qinfifo(ahc, cmd->device->id, | |
3043 | cmd->device->channel + 'A', | |
3044 | cmd->device->lun, SCB_LIST_NULL, | |
3045 | ROLE_INITIATOR, CAM_REQUEUE_REQ, | |
3046 | SEARCH_COMPLETE); | |
3047 | ahc_qinfifo_requeue_tail(ahc, pending_scb); | |
3048 | ahc_outb(ahc, SCBPTR, saved_scbptr); | |
3049 | ahc_print_path(ahc, pending_scb); | |
3050 | printf("Device is disconnected, re-queuing SCB\n"); | |
3051 | wait = TRUE; | |
3052 | } else { | |
3053 | printf("%s:%d:%d:%d: Unable to deliver message\n", | |
3054 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
3055 | cmd->device->lun); | |
3056 | retval = FAILED; | |
3057 | goto done; | |
3058 | } | |
3059 | ||
3060 | no_cmd: | |
3061 | /* | |
3062 | * Our assumption is that if we don't have the command, no | |
3063 | * recovery action was required, so we return success. Again, | |
3064 | * the semantics of the mid-layer recovery engine are not | |
3065 | * well defined, so this may change in time. | |
3066 | */ | |
3067 | retval = SUCCESS; | |
3068 | done: | |
3069 | if (paused) | |
3070 | ahc_unpause(ahc); | |
3071 | if (wait) { | |
3072 | struct timer_list timer; | |
3073 | int ret; | |
3074 | ||
3075 | ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE; | |
3076 | spin_unlock_irq(&ahc->platform_data->spin_lock); | |
3077 | init_timer(&timer); | |
3078 | timer.data = (u_long)ahc; | |
3079 | timer.expires = jiffies + (5 * HZ); | |
3080 | timer.function = ahc_linux_sem_timeout; | |
3081 | add_timer(&timer); | |
3082 | printf("Recovery code sleeping\n"); | |
3083 | down(&ahc->platform_data->eh_sem); | |
3084 | printf("Recovery code awake\n"); | |
3085 | ret = del_timer_sync(&timer); | |
3086 | if (ret == 0) { | |
3087 | printf("Timer Expired\n"); | |
3088 | retval = FAILED; | |
3089 | } | |
3090 | spin_lock_irq(&ahc->platform_data->spin_lock); | |
3091 | } | |
1da177e4 LT |
3092 | ahc_linux_run_complete_queue(ahc); |
3093 | ahc_midlayer_entrypoint_unlock(ahc, &s); | |
3094 | return (retval); | |
3095 | } | |
3096 | ||
3097 | void | |
3098 | ahc_platform_dump_card_state(struct ahc_softc *ahc) | |
3099 | { | |
1da177e4 LT |
3100 | } |
3101 | ||
3102 | static void ahc_linux_exit(void); | |
3103 | ||
fad01ef8 JB |
3104 | static void ahc_linux_get_width(struct scsi_target *starget) |
3105 | { | |
3106 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3107 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3108 | struct ahc_tmode_tstate *tstate; | |
3109 | struct ahc_initiator_tinfo *tinfo | |
3110 | = ahc_fetch_transinfo(ahc, | |
3111 | starget->channel + 'A', | |
3112 | shost->this_id, starget->id, &tstate); | |
3113 | spi_width(starget) = tinfo->curr.width; | |
3114 | } | |
3115 | ||
3116 | static void ahc_linux_set_width(struct scsi_target *starget, int width) | |
3117 | { | |
3118 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3119 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3120 | struct ahc_devinfo devinfo; | |
3121 | unsigned long flags; | |
3122 | ||
3123 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
3124 | starget->channel + 'A', ROLE_INITIATOR); | |
3125 | ahc_lock(ahc, &flags); | |
3126 | ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); | |
3127 | ahc_unlock(ahc, &flags); | |
3128 | } | |
3129 | ||
92d161c3 JB |
3130 | static void ahc_linux_get_period(struct scsi_target *starget) |
3131 | { | |
3132 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3133 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3134 | struct ahc_tmode_tstate *tstate; | |
3135 | struct ahc_initiator_tinfo *tinfo | |
3136 | = ahc_fetch_transinfo(ahc, | |
3137 | starget->channel + 'A', | |
3138 | shost->this_id, starget->id, &tstate); | |
3139 | spi_period(starget) = tinfo->curr.period; | |
3140 | } | |
3141 | ||
3142 | static void ahc_linux_set_period(struct scsi_target *starget, int period) | |
3143 | { | |
3144 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3145 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3146 | struct ahc_tmode_tstate *tstate; | |
3147 | struct ahc_initiator_tinfo *tinfo | |
3148 | = ahc_fetch_transinfo(ahc, | |
3149 | starget->channel + 'A', | |
3150 | shost->this_id, starget->id, &tstate); | |
3151 | struct ahc_devinfo devinfo; | |
3152 | unsigned int ppr_options = tinfo->curr.ppr_options; | |
3153 | unsigned long flags; | |
3154 | unsigned long offset = tinfo->curr.offset; | |
3155 | struct ahc_syncrate *syncrate; | |
3156 | ||
3157 | if (offset == 0) | |
3158 | offset = MAX_OFFSET; | |
3159 | ||
3160 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
3161 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 JB |
3162 | |
3163 | /* all PPR requests apart from QAS require wide transfers */ | |
3164 | if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { | |
3165 | ahc_linux_get_width(starget); | |
3166 | if (spi_width(starget) == 0) | |
3167 | ppr_options &= MSG_EXT_PPR_QAS_REQ; | |
3168 | } | |
3169 | ||
92d161c3 JB |
3170 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
3171 | ahc_lock(ahc, &flags); | |
3172 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, | |
3173 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
3174 | ahc_unlock(ahc, &flags); | |
3175 | } | |
3176 | ||
3177 | static void ahc_linux_get_offset(struct scsi_target *starget) | |
3178 | { | |
3179 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3180 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3181 | struct ahc_tmode_tstate *tstate; | |
3182 | struct ahc_initiator_tinfo *tinfo | |
3183 | = ahc_fetch_transinfo(ahc, | |
3184 | starget->channel + 'A', | |
3185 | shost->this_id, starget->id, &tstate); | |
3186 | spi_offset(starget) = tinfo->curr.offset; | |
3187 | } | |
3188 | ||
3189 | static void ahc_linux_set_offset(struct scsi_target *starget, int offset) | |
3190 | { | |
3191 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3192 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3193 | struct ahc_tmode_tstate *tstate; | |
3194 | struct ahc_initiator_tinfo *tinfo | |
3195 | = ahc_fetch_transinfo(ahc, | |
3196 | starget->channel + 'A', | |
3197 | shost->this_id, starget->id, &tstate); | |
3198 | struct ahc_devinfo devinfo; | |
3199 | unsigned int ppr_options = 0; | |
3200 | unsigned int period = 0; | |
3201 | unsigned long flags; | |
3202 | struct ahc_syncrate *syncrate = NULL; | |
3203 | ||
3204 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
3205 | starget->channel + 'A', ROLE_INITIATOR); | |
3206 | if (offset != 0) { | |
3207 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); | |
3208 | period = tinfo->curr.period; | |
3209 | ppr_options = tinfo->curr.ppr_options; | |
3210 | } | |
3211 | ahc_lock(ahc, &flags); | |
3212 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, | |
3213 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
3214 | ahc_unlock(ahc, &flags); | |
3215 | } | |
3216 | ||
92d161c3 JB |
3217 | static void ahc_linux_get_dt(struct scsi_target *starget) |
3218 | { | |
3219 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3220 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3221 | struct ahc_tmode_tstate *tstate; | |
3222 | struct ahc_initiator_tinfo *tinfo | |
3223 | = ahc_fetch_transinfo(ahc, | |
3224 | starget->channel + 'A', | |
3225 | shost->this_id, starget->id, &tstate); | |
3226 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ; | |
3227 | } | |
3228 | ||
3229 | static void ahc_linux_set_dt(struct scsi_target *starget, int dt) | |
3230 | { | |
3231 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3232 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3233 | struct ahc_tmode_tstate *tstate; | |
3234 | struct ahc_initiator_tinfo *tinfo | |
3235 | = ahc_fetch_transinfo(ahc, | |
3236 | starget->channel + 'A', | |
3237 | shost->this_id, starget->id, &tstate); | |
3238 | struct ahc_devinfo devinfo; | |
3239 | unsigned int ppr_options = tinfo->curr.ppr_options | |
3240 | & ~MSG_EXT_PPR_DT_REQ; | |
3241 | unsigned int period = tinfo->curr.period; | |
3242 | unsigned long flags; | |
3243 | struct ahc_syncrate *syncrate; | |
3244 | ||
3245 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
3246 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 3247 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); |
92d161c3 JB |
3248 | ahc_lock(ahc, &flags); |
3249 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset, | |
3250 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
3251 | ahc_unlock(ahc, &flags); | |
3252 | } | |
3253 | ||
3254 | static void ahc_linux_get_qas(struct scsi_target *starget) | |
3255 | { | |
3256 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3257 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3258 | struct ahc_tmode_tstate *tstate; | |
3259 | struct ahc_initiator_tinfo *tinfo | |
3260 | = ahc_fetch_transinfo(ahc, | |
3261 | starget->channel + 'A', | |
3262 | shost->this_id, starget->id, &tstate); | |
3263 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ; | |
3264 | } | |
3265 | ||
3266 | static void ahc_linux_set_qas(struct scsi_target *starget, int qas) | |
3267 | { | |
3268 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3269 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3270 | struct ahc_tmode_tstate *tstate; | |
3271 | struct ahc_initiator_tinfo *tinfo | |
3272 | = ahc_fetch_transinfo(ahc, | |
3273 | starget->channel + 'A', | |
3274 | shost->this_id, starget->id, &tstate); | |
3275 | struct ahc_devinfo devinfo; | |
3276 | unsigned int ppr_options = tinfo->curr.ppr_options | |
3277 | & ~MSG_EXT_PPR_QAS_REQ; | |
3278 | unsigned int period = tinfo->curr.period; | |
92d161c3 JB |
3279 | unsigned long flags; |
3280 | struct ahc_syncrate *syncrate; | |
3281 | ||
3282 | if (qas) | |
3283 | ppr_options |= MSG_EXT_PPR_QAS_REQ; | |
3284 | ||
3285 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
3286 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 3287 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
92d161c3 JB |
3288 | ahc_lock(ahc, &flags); |
3289 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset, | |
3290 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
3291 | ahc_unlock(ahc, &flags); | |
3292 | } | |
3293 | ||
3294 | static void ahc_linux_get_iu(struct scsi_target *starget) | |
3295 | { | |
3296 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3297 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3298 | struct ahc_tmode_tstate *tstate; | |
3299 | struct ahc_initiator_tinfo *tinfo | |
3300 | = ahc_fetch_transinfo(ahc, | |
3301 | starget->channel + 'A', | |
3302 | shost->this_id, starget->id, &tstate); | |
3303 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ; | |
3304 | } | |
3305 | ||
3306 | static void ahc_linux_set_iu(struct scsi_target *starget, int iu) | |
3307 | { | |
3308 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
3309 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
3310 | struct ahc_tmode_tstate *tstate; | |
3311 | struct ahc_initiator_tinfo *tinfo | |
3312 | = ahc_fetch_transinfo(ahc, | |
3313 | starget->channel + 'A', | |
3314 | shost->this_id, starget->id, &tstate); | |
3315 | struct ahc_devinfo devinfo; | |
3316 | unsigned int ppr_options = tinfo->curr.ppr_options | |
3317 | & ~MSG_EXT_PPR_IU_REQ; | |
3318 | unsigned int period = tinfo->curr.period; | |
92d161c3 JB |
3319 | unsigned long flags; |
3320 | struct ahc_syncrate *syncrate; | |
3321 | ||
3322 | if (iu) | |
3323 | ppr_options |= MSG_EXT_PPR_IU_REQ; | |
3324 | ||
3325 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
3326 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 3327 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
92d161c3 JB |
3328 | ahc_lock(ahc, &flags); |
3329 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset, | |
3330 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
3331 | ahc_unlock(ahc, &flags); | |
3332 | } | |
3333 | ||
3334 | static struct spi_function_template ahc_linux_transport_functions = { | |
3335 | .get_offset = ahc_linux_get_offset, | |
3336 | .set_offset = ahc_linux_set_offset, | |
3337 | .show_offset = 1, | |
3338 | .get_period = ahc_linux_get_period, | |
3339 | .set_period = ahc_linux_set_period, | |
3340 | .show_period = 1, | |
3341 | .get_width = ahc_linux_get_width, | |
3342 | .set_width = ahc_linux_set_width, | |
3343 | .show_width = 1, | |
3344 | .get_dt = ahc_linux_get_dt, | |
3345 | .set_dt = ahc_linux_set_dt, | |
3346 | .show_dt = 1, | |
3347 | .get_iu = ahc_linux_get_iu, | |
3348 | .set_iu = ahc_linux_set_iu, | |
3349 | .show_iu = 1, | |
3350 | .get_qas = ahc_linux_get_qas, | |
3351 | .set_qas = ahc_linux_set_qas, | |
3352 | .show_qas = 1, | |
3353 | }; | |
3354 | ||
3355 | ||
3356 | ||
1da177e4 LT |
3357 | static int __init |
3358 | ahc_linux_init(void) | |
3359 | { | |
3360 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
92d161c3 JB |
3361 | ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions); |
3362 | if (!ahc_linux_transport_template) | |
3363 | return -ENODEV; | |
858eaca1 JB |
3364 | if (ahc_linux_detect(&aic7xxx_driver_template)) |
3365 | return 0; | |
92d161c3 | 3366 | spi_release_transport(ahc_linux_transport_template); |
1da177e4 LT |
3367 | ahc_linux_exit(); |
3368 | return -ENODEV; | |
3369 | #else | |
3370 | scsi_register_module(MODULE_SCSI_HA, &aic7xxx_driver_template); | |
3371 | if (aic7xxx_driver_template.present == 0) { | |
3372 | scsi_unregister_module(MODULE_SCSI_HA, | |
3373 | &aic7xxx_driver_template); | |
3374 | return (-ENODEV); | |
3375 | } | |
3376 | ||
3377 | return (0); | |
3378 | #endif | |
3379 | } | |
3380 | ||
3381 | static void | |
3382 | ahc_linux_exit(void) | |
3383 | { | |
1da177e4 LT |
3384 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) |
3385 | /* | |
3386 | * In 2.4 we have to unregister from the PCI core _after_ | |
3387 | * unregistering from the scsi midlayer to avoid dangling | |
3388 | * references. | |
3389 | */ | |
3390 | scsi_unregister_module(MODULE_SCSI_HA, &aic7xxx_driver_template); | |
3391 | #endif | |
3392 | ahc_linux_pci_exit(); | |
3393 | ahc_linux_eisa_exit(); | |
92d161c3 | 3394 | spi_release_transport(ahc_linux_transport_template); |
1da177e4 LT |
3395 | } |
3396 | ||
3397 | module_init(ahc_linux_init); | |
3398 | module_exit(ahc_linux_exit); |