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1da177e4 LT |
1 | /* |
2 | * Adaptec AIC79xx device driver for Linux. | |
3 | * | |
4 | * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $ | |
5 | * | |
6 | * -------------------------------------------------------------------------- | |
7 | * Copyright (c) 1994-2000 Justin T. Gibbs. | |
8 | * Copyright (c) 1997-1999 Doug Ledford | |
9 | * Copyright (c) 2000-2003 Adaptec Inc. | |
10 | * All rights reserved. | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
45 | #include "aic79xx_osm.h" | |
46 | #include "aic79xx_inline.h" | |
47 | #include <scsi/scsicam.h> | |
48 | ||
49 | /* | |
50 | * Include aiclib.c as part of our | |
51 | * "module dependencies are hard" work around. | |
52 | */ | |
53 | #include "aiclib.c" | |
54 | ||
55 | #include <linux/init.h> /* __setup */ | |
56 | ||
57 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
58 | #include "sd.h" /* For geometry detection */ | |
59 | #endif | |
60 | ||
61 | #include <linux/mm.h> /* For fetching system memory size */ | |
62 | #include <linux/delay.h> /* For ssleep/msleep */ | |
63 | ||
64 | /* | |
65 | * Lock protecting manipulation of the ahd softc list. | |
66 | */ | |
67 | spinlock_t ahd_list_spinlock; | |
68 | ||
69 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
70 | /* For dynamic sglist size calculation. */ | |
71 | u_int ahd_linux_nseg; | |
72 | #endif | |
73 | ||
74 | /* | |
75 | * Bucket size for counting good commands in between bad ones. | |
76 | */ | |
77 | #define AHD_LINUX_ERR_THRESH 1000 | |
78 | ||
79 | /* | |
80 | * Set this to the delay in seconds after SCSI bus reset. | |
81 | * Note, we honor this only for the initial bus reset. | |
82 | * The scsi error recovery code performs its own bus settle | |
83 | * delay handling for error recovery actions. | |
84 | */ | |
85 | #ifdef CONFIG_AIC79XX_RESET_DELAY_MS | |
86 | #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS | |
87 | #else | |
88 | #define AIC79XX_RESET_DELAY 5000 | |
89 | #endif | |
90 | ||
91 | /* | |
92 | * To change the default number of tagged transactions allowed per-device, | |
93 | * add a line to the lilo.conf file like: | |
94 | * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" | |
95 | * which will result in the first four devices on the first two | |
96 | * controllers being set to a tagged queue depth of 32. | |
97 | * | |
98 | * The tag_commands is an array of 16 to allow for wide and twin adapters. | |
99 | * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 | |
100 | * for channel 1. | |
101 | */ | |
102 | typedef struct { | |
103 | uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ | |
104 | } adapter_tag_info_t; | |
105 | ||
106 | /* | |
107 | * Modify this as you see fit for your system. | |
108 | * | |
109 | * 0 tagged queuing disabled | |
110 | * 1 <= n <= 253 n == max tags ever dispatched. | |
111 | * | |
112 | * The driver will throttle the number of commands dispatched to a | |
113 | * device if it returns queue full. For devices with a fixed maximum | |
114 | * queue depth, the driver will eventually determine this depth and | |
115 | * lock it in (a console message is printed to indicate that a lock | |
116 | * has occurred). On some devices, queue full is returned for a temporary | |
117 | * resource shortage. These devices will return queue full at varying | |
118 | * depths. The driver will throttle back when the queue fulls occur and | |
119 | * attempt to slowly increase the depth over time as the device recovers | |
120 | * from the resource shortage. | |
121 | * | |
122 | * In this example, the first line will disable tagged queueing for all | |
123 | * the devices on the first probed aic79xx adapter. | |
124 | * | |
125 | * The second line enables tagged queueing with 4 commands/LUN for IDs | |
126 | * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the | |
127 | * driver to attempt to use up to 64 tags for ID 1. | |
128 | * | |
129 | * The third line is the same as the first line. | |
130 | * | |
131 | * The fourth line disables tagged queueing for devices 0 and 3. It | |
132 | * enables tagged queueing for the other IDs, with 16 commands/LUN | |
133 | * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for | |
134 | * IDs 2, 5-7, and 9-15. | |
135 | */ | |
136 | ||
137 | /* | |
138 | * NOTE: The below structure is for reference only, the actual structure | |
139 | * to modify in order to change things is just below this comment block. | |
140 | adapter_tag_info_t aic79xx_tag_info[] = | |
141 | { | |
142 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
143 | {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, | |
144 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
145 | {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} | |
146 | }; | |
147 | */ | |
148 | ||
149 | #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE | |
150 | #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE | |
151 | #else | |
152 | #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE | |
153 | #endif | |
154 | ||
155 | #define AIC79XX_CONFIGED_TAG_COMMANDS { \ | |
156 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
157 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
158 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
159 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
160 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
161 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
162 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
163 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ | |
164 | } | |
165 | ||
166 | /* | |
167 | * By default, use the number of commands specified by | |
168 | * the users kernel configuration. | |
169 | */ | |
170 | static adapter_tag_info_t aic79xx_tag_info[] = | |
171 | { | |
172 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
173 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
174 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
175 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
176 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
177 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
178 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
179 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
180 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
181 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
182 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
183 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
184 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
185 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
186 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
187 | {AIC79XX_CONFIGED_TAG_COMMANDS} | |
188 | }; | |
189 | ||
190 | /* | |
191 | * By default, read streaming is disabled. In theory, | |
192 | * read streaming should enhance performance, but early | |
193 | * U320 drive firmware actually performs slower with | |
194 | * read streaming enabled. | |
195 | */ | |
196 | #ifdef CONFIG_AIC79XX_ENABLE_RD_STRM | |
197 | #define AIC79XX_CONFIGED_RD_STRM 0xFFFF | |
198 | #else | |
199 | #define AIC79XX_CONFIGED_RD_STRM 0 | |
200 | #endif | |
201 | ||
202 | static uint16_t aic79xx_rd_strm_info[] = | |
203 | { | |
204 | AIC79XX_CONFIGED_RD_STRM, | |
205 | AIC79XX_CONFIGED_RD_STRM, | |
206 | AIC79XX_CONFIGED_RD_STRM, | |
207 | AIC79XX_CONFIGED_RD_STRM, | |
208 | AIC79XX_CONFIGED_RD_STRM, | |
209 | AIC79XX_CONFIGED_RD_STRM, | |
210 | AIC79XX_CONFIGED_RD_STRM, | |
211 | AIC79XX_CONFIGED_RD_STRM, | |
212 | AIC79XX_CONFIGED_RD_STRM, | |
213 | AIC79XX_CONFIGED_RD_STRM, | |
214 | AIC79XX_CONFIGED_RD_STRM, | |
215 | AIC79XX_CONFIGED_RD_STRM, | |
216 | AIC79XX_CONFIGED_RD_STRM, | |
217 | AIC79XX_CONFIGED_RD_STRM, | |
218 | AIC79XX_CONFIGED_RD_STRM, | |
219 | AIC79XX_CONFIGED_RD_STRM | |
220 | }; | |
221 | ||
222 | /* | |
223 | * DV option: | |
224 | * | |
225 | * positive value = DV Enabled | |
226 | * zero = DV Disabled | |
227 | * negative value = DV Default for adapter type/seeprom | |
228 | */ | |
229 | #ifdef CONFIG_AIC79XX_DV_SETTING | |
230 | #define AIC79XX_CONFIGED_DV CONFIG_AIC79XX_DV_SETTING | |
231 | #else | |
232 | #define AIC79XX_CONFIGED_DV -1 | |
233 | #endif | |
234 | ||
235 | static int8_t aic79xx_dv_settings[] = | |
236 | { | |
237 | AIC79XX_CONFIGED_DV, | |
238 | AIC79XX_CONFIGED_DV, | |
239 | AIC79XX_CONFIGED_DV, | |
240 | AIC79XX_CONFIGED_DV, | |
241 | AIC79XX_CONFIGED_DV, | |
242 | AIC79XX_CONFIGED_DV, | |
243 | AIC79XX_CONFIGED_DV, | |
244 | AIC79XX_CONFIGED_DV, | |
245 | AIC79XX_CONFIGED_DV, | |
246 | AIC79XX_CONFIGED_DV, | |
247 | AIC79XX_CONFIGED_DV, | |
248 | AIC79XX_CONFIGED_DV, | |
249 | AIC79XX_CONFIGED_DV, | |
250 | AIC79XX_CONFIGED_DV, | |
251 | AIC79XX_CONFIGED_DV, | |
252 | AIC79XX_CONFIGED_DV | |
253 | }; | |
254 | ||
255 | /* | |
256 | * The I/O cell on the chip is very configurable in respect to its analog | |
257 | * characteristics. Set the defaults here; they can be overriden with | |
258 | * the proper insmod parameters. | |
259 | */ | |
260 | struct ahd_linux_iocell_opts | |
261 | { | |
262 | uint8_t precomp; | |
263 | uint8_t slewrate; | |
264 | uint8_t amplitude; | |
265 | }; | |
266 | #define AIC79XX_DEFAULT_PRECOMP 0xFF | |
267 | #define AIC79XX_DEFAULT_SLEWRATE 0xFF | |
268 | #define AIC79XX_DEFAULT_AMPLITUDE 0xFF | |
269 | #define AIC79XX_DEFAULT_IOOPTS \ | |
270 | { \ | |
271 | AIC79XX_DEFAULT_PRECOMP, \ | |
272 | AIC79XX_DEFAULT_SLEWRATE, \ | |
273 | AIC79XX_DEFAULT_AMPLITUDE \ | |
274 | } | |
275 | #define AIC79XX_PRECOMP_INDEX 0 | |
276 | #define AIC79XX_SLEWRATE_INDEX 1 | |
277 | #define AIC79XX_AMPLITUDE_INDEX 2 | |
278 | static struct ahd_linux_iocell_opts aic79xx_iocell_info[] = | |
279 | { | |
280 | AIC79XX_DEFAULT_IOOPTS, | |
281 | AIC79XX_DEFAULT_IOOPTS, | |
282 | AIC79XX_DEFAULT_IOOPTS, | |
283 | AIC79XX_DEFAULT_IOOPTS, | |
284 | AIC79XX_DEFAULT_IOOPTS, | |
285 | AIC79XX_DEFAULT_IOOPTS, | |
286 | AIC79XX_DEFAULT_IOOPTS, | |
287 | AIC79XX_DEFAULT_IOOPTS, | |
288 | AIC79XX_DEFAULT_IOOPTS, | |
289 | AIC79XX_DEFAULT_IOOPTS, | |
290 | AIC79XX_DEFAULT_IOOPTS, | |
291 | AIC79XX_DEFAULT_IOOPTS, | |
292 | AIC79XX_DEFAULT_IOOPTS, | |
293 | AIC79XX_DEFAULT_IOOPTS, | |
294 | AIC79XX_DEFAULT_IOOPTS, | |
295 | AIC79XX_DEFAULT_IOOPTS | |
296 | }; | |
297 | ||
298 | /* | |
299 | * There should be a specific return value for this in scsi.h, but | |
300 | * it seems that most drivers ignore it. | |
301 | */ | |
302 | #define DID_UNDERFLOW DID_ERROR | |
303 | ||
304 | void | |
305 | ahd_print_path(struct ahd_softc *ahd, struct scb *scb) | |
306 | { | |
307 | printk("(scsi%d:%c:%d:%d): ", | |
308 | ahd->platform_data->host->host_no, | |
309 | scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', | |
310 | scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, | |
311 | scb != NULL ? SCB_GET_LUN(scb) : -1); | |
312 | } | |
313 | ||
314 | /* | |
315 | * XXX - these options apply unilaterally to _all_ adapters | |
316 | * cards in the system. This should be fixed. Exceptions to this | |
317 | * rule are noted in the comments. | |
318 | */ | |
319 | ||
320 | /* | |
321 | * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This | |
322 | * has no effect on any later resets that might occur due to things like | |
323 | * SCSI bus timeouts. | |
324 | */ | |
325 | static uint32_t aic79xx_no_reset; | |
326 | ||
327 | /* | |
328 | * Certain PCI motherboards will scan PCI devices from highest to lowest, | |
329 | * others scan from lowest to highest, and they tend to do all kinds of | |
330 | * strange things when they come into contact with PCI bridge chips. The | |
331 | * net result of all this is that the PCI card that is actually used to boot | |
332 | * the machine is very hard to detect. Most motherboards go from lowest | |
333 | * PCI slot number to highest, and the first SCSI controller found is the | |
334 | * one you boot from. The only exceptions to this are when a controller | |
335 | * has its BIOS disabled. So, we by default sort all of our SCSI controllers | |
336 | * from lowest PCI slot number to highest PCI slot number. We also force | |
337 | * all controllers with their BIOS disabled to the end of the list. This | |
338 | * works on *almost* all computers. Where it doesn't work, we have this | |
339 | * option. Setting this option to non-0 will reverse the order of the sort | |
340 | * to highest first, then lowest, but will still leave cards with their BIOS | |
341 | * disabled at the very end. That should fix everyone up unless there are | |
342 | * really strange cirumstances. | |
343 | */ | |
344 | static uint32_t aic79xx_reverse_scan; | |
345 | ||
346 | /* | |
347 | * Should we force EXTENDED translation on a controller. | |
348 | * 0 == Use whatever is in the SEEPROM or default to off | |
349 | * 1 == Use whatever is in the SEEPROM or default to on | |
350 | */ | |
351 | static uint32_t aic79xx_extended; | |
352 | ||
353 | /* | |
354 | * PCI bus parity checking of the Adaptec controllers. This is somewhat | |
355 | * dubious at best. To my knowledge, this option has never actually | |
356 | * solved a PCI parity problem, but on certain machines with broken PCI | |
357 | * chipset configurations, it can generate tons of false error messages. | |
358 | * It's included in the driver for completeness. | |
359 | * 0 = Shut off PCI parity check | |
360 | * non-0 = Enable PCI parity check | |
361 | * | |
362 | * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this | |
363 | * variable to -1 you would actually want to simply pass the variable | |
364 | * name without a number. That will invert the 0 which will result in | |
365 | * -1. | |
366 | */ | |
367 | static uint32_t aic79xx_pci_parity = ~0; | |
368 | ||
369 | /* | |
370 | * There are lots of broken chipsets in the world. Some of them will | |
371 | * violate the PCI spec when we issue byte sized memory writes to our | |
372 | * controller. I/O mapped register access, if allowed by the given | |
373 | * platform, will work in almost all cases. | |
374 | */ | |
375 | uint32_t aic79xx_allow_memio = ~0; | |
376 | ||
377 | /* | |
378 | * aic79xx_detect() has been run, so register all device arrivals | |
379 | * immediately with the system rather than deferring to the sorted | |
380 | * attachment performed by aic79xx_detect(). | |
381 | */ | |
382 | int aic79xx_detect_complete; | |
383 | ||
384 | /* | |
385 | * So that we can set how long each device is given as a selection timeout. | |
386 | * The table of values goes like this: | |
387 | * 0 - 256ms | |
388 | * 1 - 128ms | |
389 | * 2 - 64ms | |
390 | * 3 - 32ms | |
391 | * We default to 256ms because some older devices need a longer time | |
392 | * to respond to initial selection. | |
393 | */ | |
394 | static uint32_t aic79xx_seltime; | |
395 | ||
396 | /* | |
397 | * Certain devices do not perform any aging on commands. Should the | |
398 | * device be saturated by commands in one portion of the disk, it is | |
399 | * possible for transactions on far away sectors to never be serviced. | |
400 | * To handle these devices, we can periodically send an ordered tag to | |
401 | * force all outstanding transactions to be serviced prior to a new | |
402 | * transaction. | |
403 | */ | |
404 | uint32_t aic79xx_periodic_otag; | |
405 | ||
406 | /* | |
407 | * Module information and settable options. | |
408 | */ | |
409 | static char *aic79xx = NULL; | |
410 | ||
411 | MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); | |
412 | MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver"); | |
413 | MODULE_LICENSE("Dual BSD/GPL"); | |
414 | MODULE_VERSION(AIC79XX_DRIVER_VERSION); | |
415 | module_param(aic79xx, charp, 0); | |
416 | MODULE_PARM_DESC(aic79xx, | |
417 | "period delimited, options string.\n" | |
418 | " verbose Enable verbose/diagnostic logging\n" | |
419 | " allow_memio Allow device registers to be memory mapped\n" | |
420 | " debug Bitmask of debug values to enable\n" | |
421 | " no_reset Supress initial bus resets\n" | |
422 | " extended Enable extended geometry on all controllers\n" | |
423 | " periodic_otag Send an ordered tagged transaction\n" | |
424 | " periodically to prevent tag starvation.\n" | |
425 | " This may be required by some older disk\n" | |
426 | " or drives/RAID arrays.\n" | |
427 | " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n" | |
428 | " tag_info:<tag_str> Set per-target tag depth\n" | |
429 | " global_tag_depth:<int> Global tag depth for all targets on all buses\n" | |
430 | " rd_strm:<rd_strm_masks> Set per-target read streaming setting.\n" | |
431 | " dv:<dv_settings> Set per-controller Domain Validation Setting.\n" | |
432 | " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" | |
433 | " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" | |
434 | " amplitude:<int> Set the signal amplitude (0-7).\n" | |
435 | " seltime:<int> Selection Timeout:\n" | |
436 | " (0/256ms,1/128ms,2/64ms,3/32ms)\n" | |
437 | "\n" | |
438 | " Sample /etc/modprobe.conf line:\n" | |
439 | " Enable verbose logging\n" | |
440 | " Set tag depth on Controller 2/Target 2 to 10 tags\n" | |
441 | " Shorten the selection timeout to 128ms\n" | |
442 | "\n" | |
443 | " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" | |
444 | "\n" | |
445 | " Sample /etc/modprobe.conf line:\n" | |
446 | " Change Read Streaming for Controller's 2 and 3\n" | |
447 | "\n" | |
448 | " options aic79xx 'aic79xx=rd_strm:{..0xFFF0.0xC0F0}'"); | |
449 | ||
450 | static void ahd_linux_handle_scsi_status(struct ahd_softc *, | |
451 | struct ahd_linux_device *, | |
452 | struct scb *); | |
453 | static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, | |
454 | Scsi_Cmnd *cmd); | |
455 | static void ahd_linux_filter_inquiry(struct ahd_softc *ahd, | |
456 | struct ahd_devinfo *devinfo); | |
457 | static void ahd_linux_dev_timed_unfreeze(u_long arg); | |
458 | static void ahd_linux_sem_timeout(u_long arg); | |
459 | static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); | |
460 | static void ahd_linux_size_nseg(void); | |
461 | static void ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd); | |
462 | static void ahd_linux_start_dv(struct ahd_softc *ahd); | |
463 | static void ahd_linux_dv_timeout(struct scsi_cmnd *cmd); | |
464 | static int ahd_linux_dv_thread(void *data); | |
465 | static void ahd_linux_kill_dv_thread(struct ahd_softc *ahd); | |
466 | static void ahd_linux_dv_target(struct ahd_softc *ahd, u_int target); | |
467 | static void ahd_linux_dv_transition(struct ahd_softc *ahd, | |
468 | struct scsi_cmnd *cmd, | |
469 | struct ahd_devinfo *devinfo, | |
470 | struct ahd_linux_target *targ); | |
471 | static void ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, | |
472 | struct scsi_cmnd *cmd, | |
473 | struct ahd_devinfo *devinfo); | |
474 | static void ahd_linux_dv_inq(struct ahd_softc *ahd, | |
475 | struct scsi_cmnd *cmd, | |
476 | struct ahd_devinfo *devinfo, | |
477 | struct ahd_linux_target *targ, | |
478 | u_int request_length); | |
479 | static void ahd_linux_dv_tur(struct ahd_softc *ahd, | |
480 | struct scsi_cmnd *cmd, | |
481 | struct ahd_devinfo *devinfo); | |
482 | static void ahd_linux_dv_rebd(struct ahd_softc *ahd, | |
483 | struct scsi_cmnd *cmd, | |
484 | struct ahd_devinfo *devinfo, | |
485 | struct ahd_linux_target *targ); | |
486 | static void ahd_linux_dv_web(struct ahd_softc *ahd, | |
487 | struct scsi_cmnd *cmd, | |
488 | struct ahd_devinfo *devinfo, | |
489 | struct ahd_linux_target *targ); | |
490 | static void ahd_linux_dv_reb(struct ahd_softc *ahd, | |
491 | struct scsi_cmnd *cmd, | |
492 | struct ahd_devinfo *devinfo, | |
493 | struct ahd_linux_target *targ); | |
494 | static void ahd_linux_dv_su(struct ahd_softc *ahd, | |
495 | struct scsi_cmnd *cmd, | |
496 | struct ahd_devinfo *devinfo, | |
497 | struct ahd_linux_target *targ); | |
498 | static int ahd_linux_fallback(struct ahd_softc *ahd, | |
499 | struct ahd_devinfo *devinfo); | |
500 | static __inline int ahd_linux_dv_fallback(struct ahd_softc *ahd, | |
501 | struct ahd_devinfo *devinfo); | |
502 | static void ahd_linux_dv_complete(Scsi_Cmnd *cmd); | |
503 | static void ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ); | |
504 | static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, | |
505 | struct ahd_devinfo *devinfo); | |
506 | static u_int ahd_linux_user_dv_setting(struct ahd_softc *ahd); | |
507 | static void ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd); | |
508 | static void ahd_linux_device_queue_depth(struct ahd_softc *ahd, | |
509 | struct ahd_linux_device *dev); | |
510 | static struct ahd_linux_target* ahd_linux_alloc_target(struct ahd_softc*, | |
511 | u_int, u_int); | |
512 | static void ahd_linux_free_target(struct ahd_softc*, | |
513 | struct ahd_linux_target*); | |
514 | static struct ahd_linux_device* ahd_linux_alloc_device(struct ahd_softc*, | |
515 | struct ahd_linux_target*, | |
516 | u_int); | |
517 | static void ahd_linux_free_device(struct ahd_softc*, | |
518 | struct ahd_linux_device*); | |
519 | static void ahd_linux_run_device_queue(struct ahd_softc*, | |
520 | struct ahd_linux_device*); | |
521 | static void ahd_linux_setup_tag_info_global(char *p); | |
522 | static aic_option_callback_t ahd_linux_setup_tag_info; | |
523 | static aic_option_callback_t ahd_linux_setup_rd_strm_info; | |
524 | static aic_option_callback_t ahd_linux_setup_dv; | |
525 | static aic_option_callback_t ahd_linux_setup_iocell_info; | |
526 | static int ahd_linux_next_unit(void); | |
527 | static void ahd_runq_tasklet(unsigned long data); | |
528 | static int aic79xx_setup(char *c); | |
529 | ||
530 | /****************************** Inlines ***************************************/ | |
531 | static __inline void ahd_schedule_completeq(struct ahd_softc *ahd); | |
532 | static __inline void ahd_schedule_runq(struct ahd_softc *ahd); | |
533 | static __inline void ahd_setup_runq_tasklet(struct ahd_softc *ahd); | |
534 | static __inline void ahd_teardown_runq_tasklet(struct ahd_softc *ahd); | |
535 | static __inline struct ahd_linux_device* | |
536 | ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, | |
537 | u_int target, u_int lun, int alloc); | |
538 | static struct ahd_cmd *ahd_linux_run_complete_queue(struct ahd_softc *ahd); | |
539 | static __inline void ahd_linux_check_device_queue(struct ahd_softc *ahd, | |
540 | struct ahd_linux_device *dev); | |
541 | static __inline struct ahd_linux_device * | |
542 | ahd_linux_next_device_to_run(struct ahd_softc *ahd); | |
543 | static __inline void ahd_linux_run_device_queues(struct ahd_softc *ahd); | |
544 | static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); | |
545 | ||
546 | static __inline void | |
547 | ahd_schedule_completeq(struct ahd_softc *ahd) | |
548 | { | |
549 | if ((ahd->platform_data->flags & AHD_RUN_CMPLT_Q_TIMER) == 0) { | |
550 | ahd->platform_data->flags |= AHD_RUN_CMPLT_Q_TIMER; | |
551 | ahd->platform_data->completeq_timer.expires = jiffies; | |
552 | add_timer(&ahd->platform_data->completeq_timer); | |
553 | } | |
554 | } | |
555 | ||
556 | /* | |
557 | * Must be called with our lock held. | |
558 | */ | |
559 | static __inline void | |
560 | ahd_schedule_runq(struct ahd_softc *ahd) | |
561 | { | |
562 | tasklet_schedule(&ahd->platform_data->runq_tasklet); | |
563 | } | |
564 | ||
565 | static __inline | |
566 | void ahd_setup_runq_tasklet(struct ahd_softc *ahd) | |
567 | { | |
568 | tasklet_init(&ahd->platform_data->runq_tasklet, ahd_runq_tasklet, | |
569 | (unsigned long)ahd); | |
570 | } | |
571 | ||
572 | static __inline void | |
573 | ahd_teardown_runq_tasklet(struct ahd_softc *ahd) | |
574 | { | |
575 | tasklet_kill(&ahd->platform_data->runq_tasklet); | |
576 | } | |
577 | ||
578 | static __inline struct ahd_linux_device* | |
579 | ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, u_int target, | |
580 | u_int lun, int alloc) | |
581 | { | |
582 | struct ahd_linux_target *targ; | |
583 | struct ahd_linux_device *dev; | |
584 | u_int target_offset; | |
585 | ||
586 | target_offset = target; | |
587 | if (channel != 0) | |
588 | target_offset += 8; | |
589 | targ = ahd->platform_data->targets[target_offset]; | |
590 | if (targ == NULL) { | |
591 | if (alloc != 0) { | |
592 | targ = ahd_linux_alloc_target(ahd, channel, target); | |
593 | if (targ == NULL) | |
594 | return (NULL); | |
595 | } else | |
596 | return (NULL); | |
597 | } | |
598 | dev = targ->devices[lun]; | |
599 | if (dev == NULL && alloc != 0) | |
600 | dev = ahd_linux_alloc_device(ahd, targ, lun); | |
601 | return (dev); | |
602 | } | |
603 | ||
604 | #define AHD_LINUX_MAX_RETURNED_ERRORS 4 | |
605 | static struct ahd_cmd * | |
606 | ahd_linux_run_complete_queue(struct ahd_softc *ahd) | |
607 | { | |
608 | struct ahd_cmd *acmd; | |
609 | u_long done_flags; | |
610 | int with_errors; | |
611 | ||
612 | with_errors = 0; | |
613 | ahd_done_lock(ahd, &done_flags); | |
614 | while ((acmd = TAILQ_FIRST(&ahd->platform_data->completeq)) != NULL) { | |
615 | Scsi_Cmnd *cmd; | |
616 | ||
617 | if (with_errors > AHD_LINUX_MAX_RETURNED_ERRORS) { | |
618 | /* | |
619 | * Linux uses stack recursion to requeue | |
620 | * commands that need to be retried. Avoid | |
621 | * blowing out the stack by "spoon feeding" | |
622 | * commands that completed with error back | |
623 | * the operating system in case they are going | |
624 | * to be retried. "ick" | |
625 | */ | |
626 | ahd_schedule_completeq(ahd); | |
627 | break; | |
628 | } | |
629 | TAILQ_REMOVE(&ahd->platform_data->completeq, | |
630 | acmd, acmd_links.tqe); | |
631 | cmd = &acmd_scsi_cmd(acmd); | |
632 | cmd->host_scribble = NULL; | |
633 | if (ahd_cmd_get_transaction_status(cmd) != DID_OK | |
634 | || (cmd->result & 0xFF) != SCSI_STATUS_OK) | |
635 | with_errors++; | |
636 | ||
637 | cmd->scsi_done(cmd); | |
638 | } | |
639 | ahd_done_unlock(ahd, &done_flags); | |
640 | return (acmd); | |
641 | } | |
642 | ||
643 | static __inline void | |
644 | ahd_linux_check_device_queue(struct ahd_softc *ahd, | |
645 | struct ahd_linux_device *dev) | |
646 | { | |
647 | if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) != 0 | |
648 | && dev->active == 0) { | |
649 | dev->flags &= ~AHD_DEV_FREEZE_TIL_EMPTY; | |
650 | dev->qfrozen--; | |
651 | } | |
652 | ||
653 | if (TAILQ_FIRST(&dev->busyq) == NULL | |
654 | || dev->openings == 0 || dev->qfrozen != 0) | |
655 | return; | |
656 | ||
657 | ahd_linux_run_device_queue(ahd, dev); | |
658 | } | |
659 | ||
660 | static __inline struct ahd_linux_device * | |
661 | ahd_linux_next_device_to_run(struct ahd_softc *ahd) | |
662 | { | |
663 | ||
664 | if ((ahd->flags & AHD_RESOURCE_SHORTAGE) != 0 | |
665 | || (ahd->platform_data->qfrozen != 0 | |
666 | && AHD_DV_SIMQ_FROZEN(ahd) == 0)) | |
667 | return (NULL); | |
668 | return (TAILQ_FIRST(&ahd->platform_data->device_runq)); | |
669 | } | |
670 | ||
671 | static __inline void | |
672 | ahd_linux_run_device_queues(struct ahd_softc *ahd) | |
673 | { | |
674 | struct ahd_linux_device *dev; | |
675 | ||
676 | while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) { | |
677 | TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links); | |
678 | dev->flags &= ~AHD_DEV_ON_RUN_LIST; | |
679 | ahd_linux_check_device_queue(ahd, dev); | |
680 | } | |
681 | } | |
682 | ||
683 | static __inline void | |
684 | ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) | |
685 | { | |
686 | Scsi_Cmnd *cmd; | |
687 | int direction; | |
688 | ||
689 | cmd = scb->io_ctx; | |
be7db055 | 690 | direction = cmd->sc_data_direction; |
1da177e4 LT |
691 | ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); |
692 | if (cmd->use_sg != 0) { | |
693 | struct scatterlist *sg; | |
694 | ||
695 | sg = (struct scatterlist *)cmd->request_buffer; | |
696 | pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction); | |
697 | } else if (cmd->request_bufflen != 0) { | |
698 | pci_unmap_single(ahd->dev_softc, | |
699 | scb->platform_data->buf_busaddr, | |
700 | cmd->request_bufflen, direction); | |
701 | } | |
702 | } | |
703 | ||
704 | /******************************** Macros **************************************/ | |
705 | #define BUILD_SCSIID(ahd, cmd) \ | |
706 | ((((cmd)->device->id << TID_SHIFT) & TID) | (ahd)->our_id) | |
707 | ||
708 | /************************ Host template entry points *************************/ | |
709 | static int ahd_linux_detect(Scsi_Host_Template *); | |
710 | static const char *ahd_linux_info(struct Scsi_Host *); | |
711 | static int ahd_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *)); | |
712 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
713 | static int ahd_linux_slave_alloc(Scsi_Device *); | |
714 | static int ahd_linux_slave_configure(Scsi_Device *); | |
715 | static void ahd_linux_slave_destroy(Scsi_Device *); | |
716 | #if defined(__i386__) | |
717 | static int ahd_linux_biosparam(struct scsi_device*, | |
718 | struct block_device*, sector_t, int[]); | |
719 | #endif | |
720 | #else | |
721 | static int ahd_linux_release(struct Scsi_Host *); | |
722 | static void ahd_linux_select_queue_depth(struct Scsi_Host *host, | |
723 | Scsi_Device *scsi_devs); | |
724 | #if defined(__i386__) | |
725 | static int ahd_linux_biosparam(Disk *, kdev_t, int[]); | |
726 | #endif | |
727 | #endif | |
728 | static int ahd_linux_bus_reset(Scsi_Cmnd *); | |
729 | static int ahd_linux_dev_reset(Scsi_Cmnd *); | |
730 | static int ahd_linux_abort(Scsi_Cmnd *); | |
731 | ||
732 | /* | |
733 | * Calculate a safe value for AHD_NSEG (as expressed through ahd_linux_nseg). | |
734 | * | |
735 | * In pre-2.5.X... | |
736 | * The midlayer allocates an S/G array dynamically when a command is issued | |
737 | * using SCSI malloc. This array, which is in an OS dependent format that | |
738 | * must later be copied to our private S/G list, is sized to house just the | |
739 | * number of segments needed for the current transfer. Since the code that | |
740 | * sizes the SCSI malloc pool does not take into consideration fragmentation | |
741 | * of the pool, executing transactions numbering just a fraction of our | |
742 | * concurrent transaction limit with SG list lengths aproaching AHC_NSEG will | |
743 | * quickly depleat the SCSI malloc pool of usable space. Unfortunately, the | |
744 | * mid-layer does not properly handle this scsi malloc failures for the S/G | |
745 | * array and the result can be a lockup of the I/O subsystem. We try to size | |
746 | * our S/G list so that it satisfies our drivers allocation requirements in | |
747 | * addition to avoiding fragmentation of the SCSI malloc pool. | |
748 | */ | |
749 | static void | |
750 | ahd_linux_size_nseg(void) | |
751 | { | |
752 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
753 | u_int cur_size; | |
754 | u_int best_size; | |
755 | ||
756 | /* | |
757 | * The SCSI allocator rounds to the nearest 512 bytes | |
758 | * an cannot allocate across a page boundary. Our algorithm | |
759 | * is to start at 1K of scsi malloc space per-command and | |
760 | * loop through all factors of the PAGE_SIZE and pick the best. | |
761 | */ | |
762 | best_size = 0; | |
763 | for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) { | |
764 | u_int nseg; | |
765 | ||
766 | nseg = cur_size / sizeof(struct scatterlist); | |
767 | if (nseg < AHD_LINUX_MIN_NSEG) | |
768 | continue; | |
769 | ||
770 | if (best_size == 0) { | |
771 | best_size = cur_size; | |
772 | ahd_linux_nseg = nseg; | |
773 | } else { | |
774 | u_int best_rem; | |
775 | u_int cur_rem; | |
776 | ||
777 | /* | |
778 | * Compare the traits of the current "best_size" | |
779 | * with the current size to determine if the | |
780 | * current size is a better size. | |
781 | */ | |
782 | best_rem = best_size % sizeof(struct scatterlist); | |
783 | cur_rem = cur_size % sizeof(struct scatterlist); | |
784 | if (cur_rem < best_rem) { | |
785 | best_size = cur_size; | |
786 | ahd_linux_nseg = nseg; | |
787 | } | |
788 | } | |
789 | } | |
790 | #endif | |
791 | } | |
792 | ||
793 | /* | |
794 | * Try to detect an Adaptec 79XX controller. | |
795 | */ | |
796 | static int | |
797 | ahd_linux_detect(Scsi_Host_Template *template) | |
798 | { | |
799 | struct ahd_softc *ahd; | |
800 | int found; | |
801 | int error = 0; | |
802 | ||
803 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
804 | /* | |
805 | * It is a bug that the upper layer takes | |
806 | * this lock just prior to calling us. | |
807 | */ | |
808 | spin_unlock_irq(&io_request_lock); | |
809 | #endif | |
810 | ||
811 | /* | |
812 | * Sanity checking of Linux SCSI data structures so | |
813 | * that some of our hacks^H^H^H^H^Hassumptions aren't | |
814 | * violated. | |
815 | */ | |
816 | if (offsetof(struct ahd_cmd_internal, end) | |
817 | > offsetof(struct scsi_cmnd, host_scribble)) { | |
818 | printf("ahd_linux_detect: SCSI data structures changed.\n"); | |
819 | printf("ahd_linux_detect: Unable to attach\n"); | |
820 | return (0); | |
821 | } | |
822 | /* | |
823 | * Determine an appropriate size for our Scatter Gatther lists. | |
824 | */ | |
825 | ahd_linux_size_nseg(); | |
826 | #ifdef MODULE | |
827 | /* | |
828 | * If we've been passed any parameters, process them now. | |
829 | */ | |
830 | if (aic79xx) | |
831 | aic79xx_setup(aic79xx); | |
832 | #endif | |
833 | ||
834 | template->proc_name = "aic79xx"; | |
835 | ||
836 | /* | |
837 | * Initialize our softc list lock prior to | |
838 | * probing for any adapters. | |
839 | */ | |
840 | ahd_list_lockinit(); | |
841 | ||
842 | #ifdef CONFIG_PCI | |
843 | error = ahd_linux_pci_init(); | |
844 | if (error) | |
845 | return error; | |
846 | #endif | |
847 | ||
848 | /* | |
849 | * Register with the SCSI layer all | |
850 | * controllers we've found. | |
851 | */ | |
852 | found = 0; | |
853 | TAILQ_FOREACH(ahd, &ahd_tailq, links) { | |
854 | ||
855 | if (ahd_linux_register_host(ahd, template) == 0) | |
856 | found++; | |
857 | } | |
858 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
859 | spin_lock_irq(&io_request_lock); | |
860 | #endif | |
861 | aic79xx_detect_complete++; | |
862 | return 0; | |
863 | } | |
864 | ||
865 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
866 | /* | |
867 | * Free the passed in Scsi_Host memory structures prior to unloading the | |
868 | * module. | |
869 | */ | |
870 | static int | |
871 | ahd_linux_release(struct Scsi_Host * host) | |
872 | { | |
873 | struct ahd_softc *ahd; | |
874 | u_long l; | |
875 | ||
876 | ahd_list_lock(&l); | |
877 | if (host != NULL) { | |
878 | ||
879 | /* | |
880 | * We should be able to just perform | |
881 | * the free directly, but check our | |
882 | * list for extra sanity. | |
883 | */ | |
884 | ahd = ahd_find_softc(*(struct ahd_softc **)host->hostdata); | |
885 | if (ahd != NULL) { | |
886 | u_long s; | |
887 | ||
888 | ahd_lock(ahd, &s); | |
889 | ahd_intr_enable(ahd, FALSE); | |
890 | ahd_unlock(ahd, &s); | |
891 | ahd_free(ahd); | |
892 | } | |
893 | } | |
894 | ahd_list_unlock(&l); | |
895 | return (0); | |
896 | } | |
897 | #endif | |
898 | ||
899 | /* | |
900 | * Return a string describing the driver. | |
901 | */ | |
902 | static const char * | |
903 | ahd_linux_info(struct Scsi_Host *host) | |
904 | { | |
905 | static char buffer[512]; | |
906 | char ahd_info[256]; | |
907 | char *bp; | |
908 | struct ahd_softc *ahd; | |
909 | ||
910 | bp = &buffer[0]; | |
911 | ahd = *(struct ahd_softc **)host->hostdata; | |
912 | memset(bp, 0, sizeof(buffer)); | |
913 | strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev "); | |
914 | strcat(bp, AIC79XX_DRIVER_VERSION); | |
915 | strcat(bp, "\n"); | |
916 | strcat(bp, " <"); | |
917 | strcat(bp, ahd->description); | |
918 | strcat(bp, ">\n"); | |
919 | strcat(bp, " "); | |
920 | ahd_controller_info(ahd, ahd_info); | |
921 | strcat(bp, ahd_info); | |
922 | strcat(bp, "\n"); | |
923 | ||
924 | return (bp); | |
925 | } | |
926 | ||
927 | /* | |
928 | * Queue an SCB to the controller. | |
929 | */ | |
930 | static int | |
931 | ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *)) | |
932 | { | |
933 | struct ahd_softc *ahd; | |
934 | struct ahd_linux_device *dev; | |
935 | u_long flags; | |
936 | ||
937 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; | |
938 | ||
939 | /* | |
940 | * Save the callback on completion function. | |
941 | */ | |
942 | cmd->scsi_done = scsi_done; | |
943 | ||
944 | ahd_midlayer_entrypoint_lock(ahd, &flags); | |
945 | ||
946 | /* | |
947 | * Close the race of a command that was in the process of | |
948 | * being queued to us just as our simq was frozen. Let | |
949 | * DV commands through so long as we are only frozen to | |
950 | * perform DV. | |
951 | */ | |
952 | if (ahd->platform_data->qfrozen != 0 | |
953 | && AHD_DV_CMD(cmd) == 0) { | |
954 | ||
955 | ahd_cmd_set_transaction_status(cmd, CAM_REQUEUE_REQ); | |
956 | ahd_linux_queue_cmd_complete(ahd, cmd); | |
957 | ahd_schedule_completeq(ahd); | |
958 | ahd_midlayer_entrypoint_unlock(ahd, &flags); | |
959 | return (0); | |
960 | } | |
961 | dev = ahd_linux_get_device(ahd, cmd->device->channel, | |
962 | cmd->device->id, cmd->device->lun, | |
963 | /*alloc*/TRUE); | |
964 | if (dev == NULL) { | |
965 | ahd_cmd_set_transaction_status(cmd, CAM_RESRC_UNAVAIL); | |
966 | ahd_linux_queue_cmd_complete(ahd, cmd); | |
967 | ahd_schedule_completeq(ahd); | |
968 | ahd_midlayer_entrypoint_unlock(ahd, &flags); | |
969 | printf("%s: aic79xx_linux_queue - Unable to allocate device!\n", | |
970 | ahd_name(ahd)); | |
971 | return (0); | |
972 | } | |
973 | if (cmd->cmd_len > MAX_CDB_LEN) | |
974 | return (-EINVAL); | |
975 | cmd->result = CAM_REQ_INPROG << 16; | |
976 | TAILQ_INSERT_TAIL(&dev->busyq, (struct ahd_cmd *)cmd, acmd_links.tqe); | |
977 | if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) { | |
978 | TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links); | |
979 | dev->flags |= AHD_DEV_ON_RUN_LIST; | |
980 | ahd_linux_run_device_queues(ahd); | |
981 | } | |
982 | ahd_midlayer_entrypoint_unlock(ahd, &flags); | |
983 | return (0); | |
984 | } | |
985 | ||
986 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
987 | static int | |
988 | ahd_linux_slave_alloc(Scsi_Device *device) | |
989 | { | |
990 | struct ahd_softc *ahd; | |
991 | ||
992 | ahd = *((struct ahd_softc **)device->host->hostdata); | |
993 | if (bootverbose) | |
994 | printf("%s: Slave Alloc %d\n", ahd_name(ahd), device->id); | |
995 | return (0); | |
996 | } | |
997 | ||
998 | static int | |
999 | ahd_linux_slave_configure(Scsi_Device *device) | |
1000 | { | |
1001 | struct ahd_softc *ahd; | |
1002 | struct ahd_linux_device *dev; | |
1003 | u_long flags; | |
1004 | ||
1005 | ahd = *((struct ahd_softc **)device->host->hostdata); | |
1006 | if (bootverbose) | |
1007 | printf("%s: Slave Configure %d\n", ahd_name(ahd), device->id); | |
1008 | ahd_midlayer_entrypoint_lock(ahd, &flags); | |
1009 | /* | |
1010 | * Since Linux has attached to the device, configure | |
1011 | * it so we don't free and allocate the device | |
1012 | * structure on every command. | |
1013 | */ | |
1014 | dev = ahd_linux_get_device(ahd, device->channel, | |
1015 | device->id, device->lun, | |
1016 | /*alloc*/TRUE); | |
1017 | if (dev != NULL) { | |
1018 | dev->flags &= ~AHD_DEV_UNCONFIGURED; | |
1019 | dev->flags |= AHD_DEV_SLAVE_CONFIGURED; | |
1020 | dev->scsi_device = device; | |
1021 | ahd_linux_device_queue_depth(ahd, dev); | |
1022 | } | |
1023 | ahd_midlayer_entrypoint_unlock(ahd, &flags); | |
1024 | return (0); | |
1025 | } | |
1026 | ||
1027 | static void | |
1028 | ahd_linux_slave_destroy(Scsi_Device *device) | |
1029 | { | |
1030 | struct ahd_softc *ahd; | |
1031 | struct ahd_linux_device *dev; | |
1032 | u_long flags; | |
1033 | ||
1034 | ahd = *((struct ahd_softc **)device->host->hostdata); | |
1035 | if (bootverbose) | |
1036 | printf("%s: Slave Destroy %d\n", ahd_name(ahd), device->id); | |
1037 | ahd_midlayer_entrypoint_lock(ahd, &flags); | |
1038 | dev = ahd_linux_get_device(ahd, device->channel, | |
1039 | device->id, device->lun, | |
1040 | /*alloc*/FALSE); | |
1041 | ||
1042 | /* | |
1043 | * Filter out "silly" deletions of real devices by only | |
1044 | * deleting devices that have had slave_configure() | |
1045 | * called on them. All other devices that have not | |
1046 | * been configured will automatically be deleted by | |
1047 | * the refcounting process. | |
1048 | */ | |
1049 | if (dev != NULL | |
1050 | && (dev->flags & AHD_DEV_SLAVE_CONFIGURED) != 0) { | |
1051 | dev->flags |= AHD_DEV_UNCONFIGURED; | |
1052 | if (TAILQ_EMPTY(&dev->busyq) | |
1053 | && dev->active == 0 | |
1054 | && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0) | |
1055 | ahd_linux_free_device(ahd, dev); | |
1056 | } | |
1057 | ahd_midlayer_entrypoint_unlock(ahd, &flags); | |
1058 | } | |
1059 | #else | |
1060 | /* | |
1061 | * Sets the queue depth for each SCSI device hanging | |
1062 | * off the input host adapter. | |
1063 | */ | |
1064 | static void | |
1065 | ahd_linux_select_queue_depth(struct Scsi_Host * host, | |
1066 | Scsi_Device * scsi_devs) | |
1067 | { | |
1068 | Scsi_Device *device; | |
1069 | Scsi_Device *ldev; | |
1070 | struct ahd_softc *ahd; | |
1071 | u_long flags; | |
1072 | ||
1073 | ahd = *((struct ahd_softc **)host->hostdata); | |
1074 | ahd_lock(ahd, &flags); | |
1075 | for (device = scsi_devs; device != NULL; device = device->next) { | |
1076 | ||
1077 | /* | |
1078 | * Watch out for duplicate devices. This works around | |
1079 | * some quirks in how the SCSI scanning code does its | |
1080 | * device management. | |
1081 | */ | |
1082 | for (ldev = scsi_devs; ldev != device; ldev = ldev->next) { | |
1083 | if (ldev->host == device->host | |
1084 | && ldev->channel == device->channel | |
1085 | && ldev->id == device->id | |
1086 | && ldev->lun == device->lun) | |
1087 | break; | |
1088 | } | |
1089 | /* Skip duplicate. */ | |
1090 | if (ldev != device) | |
1091 | continue; | |
1092 | ||
1093 | if (device->host == host) { | |
1094 | struct ahd_linux_device *dev; | |
1095 | ||
1096 | /* | |
1097 | * Since Linux has attached to the device, configure | |
1098 | * it so we don't free and allocate the device | |
1099 | * structure on every command. | |
1100 | */ | |
1101 | dev = ahd_linux_get_device(ahd, device->channel, | |
1102 | device->id, device->lun, | |
1103 | /*alloc*/TRUE); | |
1104 | if (dev != NULL) { | |
1105 | dev->flags &= ~AHD_DEV_UNCONFIGURED; | |
1106 | dev->scsi_device = device; | |
1107 | ahd_linux_device_queue_depth(ahd, dev); | |
1108 | device->queue_depth = dev->openings | |
1109 | + dev->active; | |
1110 | if ((dev->flags & (AHD_DEV_Q_BASIC | |
1111 | | AHD_DEV_Q_TAGGED)) == 0) { | |
1112 | /* | |
1113 | * We allow the OS to queue 2 untagged | |
1114 | * transactions to us at any time even | |
1115 | * though we can only execute them | |
1116 | * serially on the controller/device. | |
1117 | * This should remove some latency. | |
1118 | */ | |
1119 | device->queue_depth = 2; | |
1120 | } | |
1121 | } | |
1122 | } | |
1123 | } | |
1124 | ahd_unlock(ahd, &flags); | |
1125 | } | |
1126 | #endif | |
1127 | ||
1128 | #if defined(__i386__) | |
1129 | /* | |
1130 | * Return the disk geometry for the given SCSI device. | |
1131 | */ | |
1132 | static int | |
1133 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
1134 | ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, | |
1135 | sector_t capacity, int geom[]) | |
1136 | { | |
1137 | uint8_t *bh; | |
1138 | #else | |
1139 | ahd_linux_biosparam(Disk *disk, kdev_t dev, int geom[]) | |
1140 | { | |
1141 | struct scsi_device *sdev = disk->device; | |
1142 | u_long capacity = disk->capacity; | |
1143 | struct buffer_head *bh; | |
1144 | #endif | |
1145 | int heads; | |
1146 | int sectors; | |
1147 | int cylinders; | |
1148 | int ret; | |
1149 | int extended; | |
1150 | struct ahd_softc *ahd; | |
1151 | ||
1152 | ahd = *((struct ahd_softc **)sdev->host->hostdata); | |
1153 | ||
1154 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
1155 | bh = scsi_bios_ptable(bdev); | |
1156 | #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17) | |
1157 | bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev)); | |
1158 | #else | |
1159 | bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024); | |
1160 | #endif | |
1161 | ||
1162 | if (bh) { | |
1163 | ret = scsi_partsize(bh, capacity, | |
1164 | &geom[2], &geom[0], &geom[1]); | |
1165 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
1166 | kfree(bh); | |
1167 | #else | |
1168 | brelse(bh); | |
1169 | #endif | |
1170 | if (ret != -1) | |
1171 | return (ret); | |
1172 | } | |
1173 | heads = 64; | |
1174 | sectors = 32; | |
1175 | cylinders = aic_sector_div(capacity, heads, sectors); | |
1176 | ||
1177 | if (aic79xx_extended != 0) | |
1178 | extended = 1; | |
1179 | else | |
1180 | extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; | |
1181 | if (extended && cylinders >= 1024) { | |
1182 | heads = 255; | |
1183 | sectors = 63; | |
1184 | cylinders = aic_sector_div(capacity, heads, sectors); | |
1185 | } | |
1186 | geom[0] = heads; | |
1187 | geom[1] = sectors; | |
1188 | geom[2] = cylinders; | |
1189 | return (0); | |
1190 | } | |
1191 | #endif | |
1192 | ||
1193 | /* | |
1194 | * Abort the current SCSI command(s). | |
1195 | */ | |
1196 | static int | |
1197 | ahd_linux_abort(Scsi_Cmnd *cmd) | |
1198 | { | |
1199 | struct ahd_softc *ahd; | |
1200 | struct ahd_cmd *acmd; | |
1201 | struct ahd_cmd *list_acmd; | |
1202 | struct ahd_linux_device *dev; | |
1203 | struct scb *pending_scb; | |
1204 | u_long s; | |
1205 | u_int saved_scbptr; | |
1206 | u_int active_scbptr; | |
1207 | u_int last_phase; | |
1208 | u_int cdb_byte; | |
1209 | int retval; | |
1210 | int was_paused; | |
1211 | int paused; | |
1212 | int wait; | |
1213 | int disconnected; | |
1214 | ahd_mode_state saved_modes; | |
1215 | ||
1216 | pending_scb = NULL; | |
1217 | paused = FALSE; | |
1218 | wait = FALSE; | |
1219 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; | |
1220 | acmd = (struct ahd_cmd *)cmd; | |
1221 | ||
1222 | printf("%s:%d:%d:%d: Attempting to abort cmd %p:", | |
1223 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
1224 | cmd->device->lun, cmd); | |
1225 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) | |
1226 | printf(" 0x%x", cmd->cmnd[cdb_byte]); | |
1227 | printf("\n"); | |
1228 | ||
1229 | /* | |
1230 | * In all versions of Linux, we have to work around | |
1231 | * a major flaw in how the mid-layer is locked down | |
1232 | * if we are to sleep successfully in our error handler | |
1233 | * while allowing our interrupt handler to run. Since | |
1234 | * the midlayer acquires either the io_request_lock or | |
1235 | * our lock prior to calling us, we must use the | |
1236 | * spin_unlock_irq() method for unlocking our lock. | |
1237 | * This will force interrupts to be enabled on the | |
1238 | * current CPU. Since the EH thread should not have | |
1239 | * been running with CPU interrupts disabled other than | |
1240 | * by acquiring either the io_request_lock or our own | |
1241 | * lock, this *should* be safe. | |
1242 | */ | |
1243 | ahd_midlayer_entrypoint_lock(ahd, &s); | |
1244 | ||
1245 | /* | |
1246 | * First determine if we currently own this command. | |
1247 | * Start by searching the device queue. If not found | |
1248 | * there, check the pending_scb list. If not found | |
1249 | * at all, and the system wanted us to just abort the | |
1250 | * command, return success. | |
1251 | */ | |
1252 | dev = ahd_linux_get_device(ahd, cmd->device->channel, | |
1253 | cmd->device->id, cmd->device->lun, | |
1254 | /*alloc*/FALSE); | |
1255 | ||
1256 | if (dev == NULL) { | |
1257 | /* | |
1258 | * No target device for this command exists, | |
1259 | * so we must not still own the command. | |
1260 | */ | |
1261 | printf("%s:%d:%d:%d: Is not an active device\n", | |
1262 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
1263 | cmd->device->lun); | |
1264 | retval = SUCCESS; | |
1265 | goto no_cmd; | |
1266 | } | |
1267 | ||
1268 | TAILQ_FOREACH(list_acmd, &dev->busyq, acmd_links.tqe) { | |
1269 | if (list_acmd == acmd) | |
1270 | break; | |
1271 | } | |
1272 | ||
1273 | if (list_acmd != NULL) { | |
1274 | printf("%s:%d:%d:%d: Command found on device queue\n", | |
1275 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
1276 | cmd->device->lun); | |
1277 | TAILQ_REMOVE(&dev->busyq, list_acmd, acmd_links.tqe); | |
1278 | cmd->result = DID_ABORT << 16; | |
1279 | ahd_linux_queue_cmd_complete(ahd, cmd); | |
1280 | retval = SUCCESS; | |
1281 | goto done; | |
1282 | } | |
1283 | ||
1284 | /* | |
1285 | * See if we can find a matching cmd in the pending list. | |
1286 | */ | |
1287 | LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { | |
1288 | if (pending_scb->io_ctx == cmd) | |
1289 | break; | |
1290 | } | |
1291 | ||
1292 | if (pending_scb == NULL) { | |
1293 | printf("%s:%d:%d:%d: Command not found\n", | |
1294 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
1295 | cmd->device->lun); | |
1296 | goto no_cmd; | |
1297 | } | |
1298 | ||
1299 | if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { | |
1300 | /* | |
1301 | * We can't queue two recovery actions using the same SCB | |
1302 | */ | |
1303 | retval = FAILED; | |
1304 | goto done; | |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * Ensure that the card doesn't do anything | |
1309 | * behind our back. Also make sure that we | |
1310 | * didn't "just" miss an interrupt that would | |
1311 | * affect this cmd. | |
1312 | */ | |
1313 | was_paused = ahd_is_paused(ahd); | |
1314 | ahd_pause_and_flushwork(ahd); | |
1315 | paused = TRUE; | |
1316 | ||
1317 | if ((pending_scb->flags & SCB_ACTIVE) == 0) { | |
1318 | printf("%s:%d:%d:%d: Command already completed\n", | |
1319 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
1320 | cmd->device->lun); | |
1321 | goto no_cmd; | |
1322 | } | |
1323 | ||
1324 | printf("%s: At time of recovery, card was %spaused\n", | |
1325 | ahd_name(ahd), was_paused ? "" : "not "); | |
1326 | ahd_dump_card_state(ahd); | |
1327 | ||
1328 | disconnected = TRUE; | |
1329 | if (ahd_search_qinfifo(ahd, cmd->device->id, cmd->device->channel + 'A', | |
1330 | cmd->device->lun, SCB_GET_TAG(pending_scb), | |
1331 | ROLE_INITIATOR, CAM_REQ_ABORTED, | |
1332 | SEARCH_COMPLETE) > 0) { | |
1333 | printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", | |
1334 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
1335 | cmd->device->lun); | |
1336 | retval = SUCCESS; | |
1337 | goto done; | |
1338 | } | |
1339 | ||
1340 | saved_modes = ahd_save_modes(ahd); | |
1341 | ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); | |
1342 | last_phase = ahd_inb(ahd, LASTPHASE); | |
1343 | saved_scbptr = ahd_get_scbptr(ahd); | |
1344 | active_scbptr = saved_scbptr; | |
1345 | if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { | |
1346 | struct scb *bus_scb; | |
1347 | ||
1348 | bus_scb = ahd_lookup_scb(ahd, active_scbptr); | |
1349 | if (bus_scb == pending_scb) | |
1350 | disconnected = FALSE; | |
1351 | } | |
1352 | ||
1353 | /* | |
1354 | * At this point, pending_scb is the scb associated with the | |
1355 | * passed in command. That command is currently active on the | |
1356 | * bus or is in the disconnected state. | |
1357 | */ | |
1358 | if (last_phase != P_BUSFREE | |
1359 | && SCB_GET_TAG(pending_scb) == active_scbptr) { | |
1360 | ||
1361 | /* | |
1362 | * We're active on the bus, so assert ATN | |
1363 | * and hope that the target responds. | |
1364 | */ | |
1365 | pending_scb = ahd_lookup_scb(ahd, active_scbptr); | |
1366 | pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; | |
1367 | ahd_outb(ahd, MSG_OUT, HOST_MSG); | |
1368 | ahd_outb(ahd, SCSISIGO, last_phase|ATNO); | |
1369 | printf("%s:%d:%d:%d: Device is active, asserting ATN\n", | |
1370 | ahd_name(ahd), cmd->device->channel, | |
1371 | cmd->device->id, cmd->device->lun); | |
1372 | wait = TRUE; | |
1373 | } else if (disconnected) { | |
1374 | ||
1375 | /* | |
1376 | * Actually re-queue this SCB in an attempt | |
1377 | * to select the device before it reconnects. | |
1378 | */ | |
1379 | pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; | |
1380 | ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); | |
1381 | pending_scb->hscb->cdb_len = 0; | |
1382 | pending_scb->hscb->task_attribute = 0; | |
1383 | pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; | |
1384 | ||
1385 | if ((pending_scb->flags & SCB_PACKETIZED) != 0) { | |
1386 | /* | |
1387 | * Mark the SCB has having an outstanding | |
1388 | * task management function. Should the command | |
1389 | * complete normally before the task management | |
1390 | * function can be sent, the host will be notified | |
1391 | * to abort our requeued SCB. | |
1392 | */ | |
1393 | ahd_outb(ahd, SCB_TASK_MANAGEMENT, | |
1394 | pending_scb->hscb->task_management); | |
1395 | } else { | |
1396 | /* | |
1397 | * If non-packetized, set the MK_MESSAGE control | |
1398 | * bit indicating that we desire to send a message. | |
1399 | * We also set the disconnected flag since there is | |
1400 | * no guarantee that our SCB control byte matches | |
1401 | * the version on the card. We don't want the | |
1402 | * sequencer to abort the command thinking an | |
1403 | * unsolicited reselection occurred. | |
1404 | */ | |
1405 | pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; | |
1406 | ||
1407 | /* | |
1408 | * The sequencer will never re-reference the | |
1409 | * in-core SCB. To make sure we are notified | |
1410 | * during reslection, set the MK_MESSAGE flag in | |
1411 | * the card's copy of the SCB. | |
1412 | */ | |
1413 | ahd_outb(ahd, SCB_CONTROL, | |
1414 | ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); | |
1415 | } | |
1416 | ||
1417 | /* | |
1418 | * Clear out any entries in the QINFIFO first | |
1419 | * so we are the next SCB for this target | |
1420 | * to run. | |
1421 | */ | |
1422 | ahd_search_qinfifo(ahd, cmd->device->id, | |
1423 | cmd->device->channel + 'A', cmd->device->lun, | |
1424 | SCB_LIST_NULL, ROLE_INITIATOR, | |
1425 | CAM_REQUEUE_REQ, SEARCH_COMPLETE); | |
1426 | ahd_qinfifo_requeue_tail(ahd, pending_scb); | |
1427 | ahd_set_scbptr(ahd, saved_scbptr); | |
1428 | ahd_print_path(ahd, pending_scb); | |
1429 | printf("Device is disconnected, re-queuing SCB\n"); | |
1430 | wait = TRUE; | |
1431 | } else { | |
1432 | printf("%s:%d:%d:%d: Unable to deliver message\n", | |
1433 | ahd_name(ahd), cmd->device->channel, | |
1434 | cmd->device->id, cmd->device->lun); | |
1435 | retval = FAILED; | |
1436 | goto done; | |
1437 | } | |
1438 | ||
1439 | no_cmd: | |
1440 | /* | |
1441 | * Our assumption is that if we don't have the command, no | |
1442 | * recovery action was required, so we return success. Again, | |
1443 | * the semantics of the mid-layer recovery engine are not | |
1444 | * well defined, so this may change in time. | |
1445 | */ | |
1446 | retval = SUCCESS; | |
1447 | done: | |
1448 | if (paused) | |
1449 | ahd_unpause(ahd); | |
1450 | if (wait) { | |
1451 | struct timer_list timer; | |
1452 | int ret; | |
1453 | ||
1454 | pending_scb->platform_data->flags |= AHD_SCB_UP_EH_SEM; | |
1455 | spin_unlock_irq(&ahd->platform_data->spin_lock); | |
1456 | init_timer(&timer); | |
1457 | timer.data = (u_long)pending_scb; | |
1458 | timer.expires = jiffies + (5 * HZ); | |
1459 | timer.function = ahd_linux_sem_timeout; | |
1460 | add_timer(&timer); | |
1461 | printf("Recovery code sleeping\n"); | |
1462 | down(&ahd->platform_data->eh_sem); | |
1463 | printf("Recovery code awake\n"); | |
1464 | ret = del_timer_sync(&timer); | |
1465 | if (ret == 0) { | |
1466 | printf("Timer Expired\n"); | |
1467 | retval = FAILED; | |
1468 | } | |
1469 | spin_lock_irq(&ahd->platform_data->spin_lock); | |
1470 | } | |
1471 | ahd_schedule_runq(ahd); | |
1472 | ahd_linux_run_complete_queue(ahd); | |
1473 | ahd_midlayer_entrypoint_unlock(ahd, &s); | |
1474 | return (retval); | |
1475 | } | |
1476 | ||
1477 | ||
1478 | static void | |
1479 | ahd_linux_dev_reset_complete(Scsi_Cmnd *cmd) | |
1480 | { | |
1481 | free(cmd, M_DEVBUF); | |
1482 | } | |
1483 | ||
1484 | /* | |
1485 | * Attempt to send a target reset message to the device that timed out. | |
1486 | */ | |
1487 | static int | |
1488 | ahd_linux_dev_reset(Scsi_Cmnd *cmd) | |
1489 | { | |
1490 | struct ahd_softc *ahd; | |
1491 | struct scsi_cmnd *recovery_cmd; | |
1492 | struct ahd_linux_device *dev; | |
1493 | struct ahd_initiator_tinfo *tinfo; | |
1494 | struct ahd_tmode_tstate *tstate; | |
1495 | struct scb *scb; | |
1496 | struct hardware_scb *hscb; | |
1497 | u_long s; | |
1498 | struct timer_list timer; | |
1499 | int retval; | |
1500 | ||
1501 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; | |
1502 | recovery_cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK); | |
1503 | if (!recovery_cmd) | |
1504 | return (FAILED); | |
1505 | memset(recovery_cmd, 0, sizeof(struct scsi_cmnd)); | |
1506 | recovery_cmd->device = cmd->device; | |
1507 | recovery_cmd->scsi_done = ahd_linux_dev_reset_complete; | |
1508 | #if AHD_DEBUG | |
1509 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) | |
1510 | printf("%s:%d:%d:%d: Device reset called for cmd %p\n", | |
1511 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
1512 | cmd->device->lun, cmd); | |
1513 | #endif | |
1514 | ahd_midlayer_entrypoint_lock(ahd, &s); | |
1515 | ||
1516 | dev = ahd_linux_get_device(ahd, cmd->device->channel, cmd->device->id, | |
1517 | cmd->device->lun, /*alloc*/FALSE); | |
1518 | if (dev == NULL) { | |
1519 | ahd_midlayer_entrypoint_unlock(ahd, &s); | |
1520 | kfree(recovery_cmd); | |
1521 | return (FAILED); | |
1522 | } | |
1523 | if ((scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX)) == NULL) { | |
1524 | ahd_midlayer_entrypoint_unlock(ahd, &s); | |
1525 | kfree(recovery_cmd); | |
1526 | return (FAILED); | |
1527 | } | |
1528 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, | |
1529 | cmd->device->id, &tstate); | |
1530 | recovery_cmd->result = CAM_REQ_INPROG << 16; | |
1531 | recovery_cmd->host_scribble = (char *)scb; | |
1532 | scb->io_ctx = recovery_cmd; | |
1533 | scb->platform_data->dev = dev; | |
1534 | scb->sg_count = 0; | |
1535 | ahd_set_residual(scb, 0); | |
1536 | ahd_set_sense_residual(scb, 0); | |
1537 | hscb = scb->hscb; | |
1538 | hscb->control = 0; | |
1539 | hscb->scsiid = BUILD_SCSIID(ahd, cmd); | |
1540 | hscb->lun = cmd->device->lun; | |
1541 | hscb->cdb_len = 0; | |
1542 | hscb->task_management = SIU_TASKMGMT_LUN_RESET; | |
1543 | scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; | |
1544 | if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { | |
1545 | scb->flags |= SCB_PACKETIZED; | |
1546 | } else { | |
1547 | hscb->control |= MK_MESSAGE; | |
1548 | } | |
1549 | dev->openings--; | |
1550 | dev->active++; | |
1551 | dev->commands_issued++; | |
1552 | LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); | |
1553 | ahd_queue_scb(ahd, scb); | |
1554 | ||
1555 | scb->platform_data->flags |= AHD_SCB_UP_EH_SEM; | |
1556 | spin_unlock_irq(&ahd->platform_data->spin_lock); | |
1557 | init_timer(&timer); | |
1558 | timer.data = (u_long)scb; | |
1559 | timer.expires = jiffies + (5 * HZ); | |
1560 | timer.function = ahd_linux_sem_timeout; | |
1561 | add_timer(&timer); | |
1562 | printf("Recovery code sleeping\n"); | |
1563 | down(&ahd->platform_data->eh_sem); | |
1564 | printf("Recovery code awake\n"); | |
1565 | retval = SUCCESS; | |
1566 | if (del_timer_sync(&timer) == 0) { | |
1567 | printf("Timer Expired\n"); | |
1568 | retval = FAILED; | |
1569 | } | |
1570 | spin_lock_irq(&ahd->platform_data->spin_lock); | |
1571 | ahd_schedule_runq(ahd); | |
1572 | ahd_linux_run_complete_queue(ahd); | |
1573 | ahd_midlayer_entrypoint_unlock(ahd, &s); | |
1574 | printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); | |
1575 | return (retval); | |
1576 | } | |
1577 | ||
1578 | /* | |
1579 | * Reset the SCSI bus. | |
1580 | */ | |
1581 | static int | |
1582 | ahd_linux_bus_reset(Scsi_Cmnd *cmd) | |
1583 | { | |
1584 | struct ahd_softc *ahd; | |
1585 | u_long s; | |
1586 | int found; | |
1587 | ||
1588 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; | |
1589 | #ifdef AHD_DEBUG | |
1590 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) | |
1591 | printf("%s: Bus reset called for cmd %p\n", | |
1592 | ahd_name(ahd), cmd); | |
1593 | #endif | |
1594 | ahd_midlayer_entrypoint_lock(ahd, &s); | |
1595 | found = ahd_reset_channel(ahd, cmd->device->channel + 'A', | |
1596 | /*initiate reset*/TRUE); | |
1597 | ahd_linux_run_complete_queue(ahd); | |
1598 | ahd_midlayer_entrypoint_unlock(ahd, &s); | |
1599 | ||
1600 | if (bootverbose) | |
1601 | printf("%s: SCSI bus reset delivered. " | |
1602 | "%d SCBs aborted.\n", ahd_name(ahd), found); | |
1603 | ||
1604 | return (SUCCESS); | |
1605 | } | |
1606 | ||
1607 | Scsi_Host_Template aic79xx_driver_template = { | |
1608 | .module = THIS_MODULE, | |
1609 | .name = "aic79xx", | |
1610 | .proc_info = ahd_linux_proc_info, | |
1611 | .info = ahd_linux_info, | |
1612 | .queuecommand = ahd_linux_queue, | |
1613 | .eh_abort_handler = ahd_linux_abort, | |
1614 | .eh_device_reset_handler = ahd_linux_dev_reset, | |
1615 | .eh_bus_reset_handler = ahd_linux_bus_reset, | |
1616 | #if defined(__i386__) | |
1617 | .bios_param = ahd_linux_biosparam, | |
1618 | #endif | |
1619 | .can_queue = AHD_MAX_QUEUE, | |
1620 | .this_id = -1, | |
1621 | .cmd_per_lun = 2, | |
1622 | .use_clustering = ENABLE_CLUSTERING, | |
1623 | .slave_alloc = ahd_linux_slave_alloc, | |
1624 | .slave_configure = ahd_linux_slave_configure, | |
1625 | .slave_destroy = ahd_linux_slave_destroy, | |
1626 | }; | |
1627 | ||
1628 | /**************************** Tasklet Handler *********************************/ | |
1629 | ||
1630 | /* | |
1631 | * In 2.4.X and above, this routine is called from a tasklet, | |
1632 | * so we must re-acquire our lock prior to executing this code. | |
1633 | * In all prior kernels, ahd_schedule_runq() calls this routine | |
1634 | * directly and ahd_schedule_runq() is called with our lock held. | |
1635 | */ | |
1636 | static void | |
1637 | ahd_runq_tasklet(unsigned long data) | |
1638 | { | |
1639 | struct ahd_softc* ahd; | |
1640 | struct ahd_linux_device *dev; | |
1641 | u_long flags; | |
1642 | ||
1643 | ahd = (struct ahd_softc *)data; | |
1644 | ahd_lock(ahd, &flags); | |
1645 | while ((dev = ahd_linux_next_device_to_run(ahd)) != NULL) { | |
1646 | ||
1647 | TAILQ_REMOVE(&ahd->platform_data->device_runq, dev, links); | |
1648 | dev->flags &= ~AHD_DEV_ON_RUN_LIST; | |
1649 | ahd_linux_check_device_queue(ahd, dev); | |
1650 | /* Yeild to our interrupt handler */ | |
1651 | ahd_unlock(ahd, &flags); | |
1652 | ahd_lock(ahd, &flags); | |
1653 | } | |
1654 | ahd_unlock(ahd, &flags); | |
1655 | } | |
1656 | ||
1657 | /******************************** Bus DMA *************************************/ | |
1658 | int | |
1659 | ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, | |
1660 | bus_size_t alignment, bus_size_t boundary, | |
1661 | dma_addr_t lowaddr, dma_addr_t highaddr, | |
1662 | bus_dma_filter_t *filter, void *filterarg, | |
1663 | bus_size_t maxsize, int nsegments, | |
1664 | bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) | |
1665 | { | |
1666 | bus_dma_tag_t dmat; | |
1667 | ||
1668 | dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); | |
1669 | if (dmat == NULL) | |
1670 | return (ENOMEM); | |
1671 | ||
1672 | /* | |
1673 | * Linux is very simplistic about DMA memory. For now don't | |
1674 | * maintain all specification information. Once Linux supplies | |
1675 | * better facilities for doing these operations, or the | |
1676 | * needs of this particular driver change, we might need to do | |
1677 | * more here. | |
1678 | */ | |
1679 | dmat->alignment = alignment; | |
1680 | dmat->boundary = boundary; | |
1681 | dmat->maxsize = maxsize; | |
1682 | *ret_tag = dmat; | |
1683 | return (0); | |
1684 | } | |
1685 | ||
1686 | void | |
1687 | ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) | |
1688 | { | |
1689 | free(dmat, M_DEVBUF); | |
1690 | } | |
1691 | ||
1692 | int | |
1693 | ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, | |
1694 | int flags, bus_dmamap_t *mapp) | |
1695 | { | |
1696 | bus_dmamap_t map; | |
1697 | ||
1698 | map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT); | |
1699 | if (map == NULL) | |
1700 | return (ENOMEM); | |
1701 | /* | |
1702 | * Although we can dma data above 4GB, our | |
1703 | * "consistent" memory is below 4GB for | |
1704 | * space efficiency reasons (only need a 4byte | |
1705 | * address). For this reason, we have to reset | |
1706 | * our dma mask when doing allocations. | |
1707 | */ | |
1708 | if (ahd->dev_softc != NULL) | |
1709 | if (pci_set_dma_mask(ahd->dev_softc, 0xFFFFFFFF)) { | |
1710 | printk(KERN_WARNING "aic79xx: No suitable DMA available.\n"); | |
1711 | kfree(map); | |
1712 | return (ENODEV); | |
1713 | } | |
1714 | *vaddr = pci_alloc_consistent(ahd->dev_softc, | |
1715 | dmat->maxsize, &map->bus_addr); | |
1716 | if (ahd->dev_softc != NULL) | |
1717 | if (pci_set_dma_mask(ahd->dev_softc, | |
1718 | ahd->platform_data->hw_dma_mask)) { | |
1719 | printk(KERN_WARNING "aic79xx: No suitable DMA available.\n"); | |
1720 | kfree(map); | |
1721 | return (ENODEV); | |
1722 | } | |
1723 | if (*vaddr == NULL) | |
1724 | return (ENOMEM); | |
1725 | *mapp = map; | |
1726 | return(0); | |
1727 | } | |
1728 | ||
1729 | void | |
1730 | ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, | |
1731 | void* vaddr, bus_dmamap_t map) | |
1732 | { | |
1733 | pci_free_consistent(ahd->dev_softc, dmat->maxsize, | |
1734 | vaddr, map->bus_addr); | |
1735 | } | |
1736 | ||
1737 | int | |
1738 | ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, | |
1739 | void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, | |
1740 | void *cb_arg, int flags) | |
1741 | { | |
1742 | /* | |
1743 | * Assume for now that this will only be used during | |
1744 | * initialization and not for per-transaction buffer mapping. | |
1745 | */ | |
1746 | bus_dma_segment_t stack_sg; | |
1747 | ||
1748 | stack_sg.ds_addr = map->bus_addr; | |
1749 | stack_sg.ds_len = dmat->maxsize; | |
1750 | cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); | |
1751 | return (0); | |
1752 | } | |
1753 | ||
1754 | void | |
1755 | ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) | |
1756 | { | |
1757 | /* | |
1758 | * The map may is NULL in our < 2.3.X implementation. | |
1759 | */ | |
1760 | if (map != NULL) | |
1761 | free(map, M_DEVBUF); | |
1762 | } | |
1763 | ||
1764 | int | |
1765 | ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) | |
1766 | { | |
1767 | /* Nothing to do */ | |
1768 | return (0); | |
1769 | } | |
1770 | ||
1771 | /********************* Platform Dependent Functions ***************************/ | |
1772 | /* | |
1773 | * Compare "left hand" softc with "right hand" softc, returning: | |
1774 | * < 0 - lahd has a lower priority than rahd | |
1775 | * 0 - Softcs are equal | |
1776 | * > 0 - lahd has a higher priority than rahd | |
1777 | */ | |
1778 | int | |
1779 | ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd) | |
1780 | { | |
1781 | int value; | |
1782 | ||
1783 | /* | |
1784 | * Under Linux, cards are ordered as follows: | |
1785 | * 1) PCI devices that are marked as the boot controller. | |
1786 | * 2) PCI devices with BIOS enabled sorted by bus/slot/func. | |
1787 | * 3) All remaining PCI devices sorted by bus/slot/func. | |
1788 | */ | |
1789 | #if 0 | |
1790 | value = (lahd->flags & AHD_BOOT_CHANNEL) | |
1791 | - (rahd->flags & AHD_BOOT_CHANNEL); | |
1792 | if (value != 0) | |
1793 | /* Controllers set for boot have a *higher* priority */ | |
1794 | return (value); | |
1795 | #endif | |
1796 | ||
1797 | value = (lahd->flags & AHD_BIOS_ENABLED) | |
1798 | - (rahd->flags & AHD_BIOS_ENABLED); | |
1799 | if (value != 0) | |
1800 | /* Controllers with BIOS enabled have a *higher* priority */ | |
1801 | return (value); | |
1802 | ||
1803 | /* Still equal. Sort by bus/slot/func. */ | |
1804 | if (aic79xx_reverse_scan != 0) | |
1805 | value = ahd_get_pci_bus(lahd->dev_softc) | |
1806 | - ahd_get_pci_bus(rahd->dev_softc); | |
1807 | else | |
1808 | value = ahd_get_pci_bus(rahd->dev_softc) | |
1809 | - ahd_get_pci_bus(lahd->dev_softc); | |
1810 | if (value != 0) | |
1811 | return (value); | |
1812 | if (aic79xx_reverse_scan != 0) | |
1813 | value = ahd_get_pci_slot(lahd->dev_softc) | |
1814 | - ahd_get_pci_slot(rahd->dev_softc); | |
1815 | else | |
1816 | value = ahd_get_pci_slot(rahd->dev_softc) | |
1817 | - ahd_get_pci_slot(lahd->dev_softc); | |
1818 | if (value != 0) | |
1819 | return (value); | |
1820 | ||
1821 | value = rahd->channel - lahd->channel; | |
1822 | return (value); | |
1823 | } | |
1824 | ||
1825 | static void | |
1826 | ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) | |
1827 | { | |
1828 | ||
1829 | if ((instance >= 0) && (targ >= 0) | |
1830 | && (instance < NUM_ELEMENTS(aic79xx_tag_info)) | |
1831 | && (targ < AHD_NUM_TARGETS)) { | |
1832 | aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; | |
1833 | if (bootverbose) | |
1834 | printf("tag_info[%d:%d] = %d\n", instance, targ, value); | |
1835 | } | |
1836 | } | |
1837 | ||
1838 | static void | |
1839 | ahd_linux_setup_rd_strm_info(u_long arg, int instance, int targ, int32_t value) | |
1840 | { | |
1841 | if ((instance >= 0) | |
1842 | && (instance < NUM_ELEMENTS(aic79xx_rd_strm_info))) { | |
1843 | aic79xx_rd_strm_info[instance] = value & 0xFFFF; | |
1844 | if (bootverbose) | |
1845 | printf("rd_strm[%d] = 0x%x\n", instance, value); | |
1846 | } | |
1847 | } | |
1848 | ||
1849 | static void | |
1850 | ahd_linux_setup_dv(u_long arg, int instance, int targ, int32_t value) | |
1851 | { | |
1852 | if ((instance >= 0) | |
1853 | && (instance < NUM_ELEMENTS(aic79xx_dv_settings))) { | |
1854 | aic79xx_dv_settings[instance] = value; | |
1855 | if (bootverbose) | |
1856 | printf("dv[%d] = %d\n", instance, value); | |
1857 | } | |
1858 | } | |
1859 | ||
1860 | static void | |
1861 | ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) | |
1862 | { | |
1863 | ||
1864 | if ((instance >= 0) | |
1865 | && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) { | |
1866 | uint8_t *iocell_info; | |
1867 | ||
1868 | iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; | |
1869 | iocell_info[index] = value & 0xFFFF; | |
1870 | if (bootverbose) | |
1871 | printf("iocell[%d:%ld] = %d\n", instance, index, value); | |
1872 | } | |
1873 | } | |
1874 | ||
1875 | static void | |
1876 | ahd_linux_setup_tag_info_global(char *p) | |
1877 | { | |
1878 | int tags, i, j; | |
1879 | ||
1880 | tags = simple_strtoul(p + 1, NULL, 0) & 0xff; | |
1881 | printf("Setting Global Tags= %d\n", tags); | |
1882 | ||
1883 | for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) { | |
1884 | for (j = 0; j < AHD_NUM_TARGETS; j++) { | |
1885 | aic79xx_tag_info[i].tag_commands[j] = tags; | |
1886 | } | |
1887 | } | |
1888 | } | |
1889 | ||
1890 | /* | |
1891 | * Handle Linux boot parameters. This routine allows for assigning a value | |
1892 | * to a parameter with a ':' between the parameter and the value. | |
1893 | * ie. aic79xx=stpwlev:1,extended | |
1894 | */ | |
1895 | static int | |
1896 | aic79xx_setup(char *s) | |
1897 | { | |
1898 | int i, n; | |
1899 | char *p; | |
1900 | char *end; | |
1901 | ||
1902 | static struct { | |
1903 | const char *name; | |
1904 | uint32_t *flag; | |
1905 | } options[] = { | |
1906 | { "extended", &aic79xx_extended }, | |
1907 | { "no_reset", &aic79xx_no_reset }, | |
1908 | { "verbose", &aic79xx_verbose }, | |
1909 | { "allow_memio", &aic79xx_allow_memio}, | |
1910 | #ifdef AHD_DEBUG | |
1911 | { "debug", &ahd_debug }, | |
1912 | #endif | |
1913 | { "reverse_scan", &aic79xx_reverse_scan }, | |
1914 | { "periodic_otag", &aic79xx_periodic_otag }, | |
1915 | { "pci_parity", &aic79xx_pci_parity }, | |
1916 | { "seltime", &aic79xx_seltime }, | |
1917 | { "tag_info", NULL }, | |
1918 | { "global_tag_depth", NULL}, | |
1919 | { "rd_strm", NULL }, | |
1920 | { "dv", NULL }, | |
1921 | { "slewrate", NULL }, | |
1922 | { "precomp", NULL }, | |
1923 | { "amplitude", NULL }, | |
1924 | }; | |
1925 | ||
1926 | end = strchr(s, '\0'); | |
1927 | ||
1928 | /* | |
1929 | * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS | |
1930 | * will never be 0 in this case. | |
1931 | */ | |
1932 | n = 0; | |
1933 | ||
1934 | while ((p = strsep(&s, ",.")) != NULL) { | |
1935 | if (*p == '\0') | |
1936 | continue; | |
1937 | for (i = 0; i < NUM_ELEMENTS(options); i++) { | |
1938 | ||
1939 | n = strlen(options[i].name); | |
1940 | if (strncmp(options[i].name, p, n) == 0) | |
1941 | break; | |
1942 | } | |
1943 | if (i == NUM_ELEMENTS(options)) | |
1944 | continue; | |
1945 | ||
1946 | if (strncmp(p, "global_tag_depth", n) == 0) { | |
1947 | ahd_linux_setup_tag_info_global(p + n); | |
1948 | } else if (strncmp(p, "tag_info", n) == 0) { | |
1949 | s = aic_parse_brace_option("tag_info", p + n, end, | |
1950 | 2, ahd_linux_setup_tag_info, 0); | |
1951 | } else if (strncmp(p, "rd_strm", n) == 0) { | |
1952 | s = aic_parse_brace_option("rd_strm", p + n, end, | |
1953 | 1, ahd_linux_setup_rd_strm_info, 0); | |
1954 | } else if (strncmp(p, "dv", n) == 0) { | |
1955 | s = aic_parse_brace_option("dv", p + n, end, 1, | |
1956 | ahd_linux_setup_dv, 0); | |
1957 | } else if (strncmp(p, "slewrate", n) == 0) { | |
1958 | s = aic_parse_brace_option("slewrate", | |
1959 | p + n, end, 1, ahd_linux_setup_iocell_info, | |
1960 | AIC79XX_SLEWRATE_INDEX); | |
1961 | } else if (strncmp(p, "precomp", n) == 0) { | |
1962 | s = aic_parse_brace_option("precomp", | |
1963 | p + n, end, 1, ahd_linux_setup_iocell_info, | |
1964 | AIC79XX_PRECOMP_INDEX); | |
1965 | } else if (strncmp(p, "amplitude", n) == 0) { | |
1966 | s = aic_parse_brace_option("amplitude", | |
1967 | p + n, end, 1, ahd_linux_setup_iocell_info, | |
1968 | AIC79XX_AMPLITUDE_INDEX); | |
1969 | } else if (p[n] == ':') { | |
1970 | *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); | |
1971 | } else if (!strncmp(p, "verbose", n)) { | |
1972 | *(options[i].flag) = 1; | |
1973 | } else { | |
1974 | *(options[i].flag) ^= 0xFFFFFFFF; | |
1975 | } | |
1976 | } | |
1977 | return 1; | |
1978 | } | |
1979 | ||
1980 | __setup("aic79xx=", aic79xx_setup); | |
1981 | ||
1982 | uint32_t aic79xx_verbose; | |
1983 | ||
1984 | int | |
1985 | ahd_linux_register_host(struct ahd_softc *ahd, Scsi_Host_Template *template) | |
1986 | { | |
1987 | char buf[80]; | |
1988 | struct Scsi_Host *host; | |
1989 | char *new_name; | |
1990 | u_long s; | |
1991 | u_long target; | |
1992 | ||
1993 | template->name = ahd->description; | |
1994 | host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); | |
1995 | if (host == NULL) | |
1996 | return (ENOMEM); | |
1997 | ||
1998 | *((struct ahd_softc **)host->hostdata) = ahd; | |
1999 | ahd_lock(ahd, &s); | |
2000 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
2001 | scsi_assign_lock(host, &ahd->platform_data->spin_lock); | |
2002 | #elif AHD_SCSI_HAS_HOST_LOCK != 0 | |
2003 | host->lock = &ahd->platform_data->spin_lock; | |
2004 | #endif | |
2005 | ahd->platform_data->host = host; | |
2006 | host->can_queue = AHD_MAX_QUEUE; | |
2007 | host->cmd_per_lun = 2; | |
2008 | host->sg_tablesize = AHD_NSEG; | |
2009 | host->this_id = ahd->our_id; | |
2010 | host->irq = ahd->platform_data->irq; | |
2011 | host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; | |
2012 | host->max_lun = AHD_NUM_LUNS; | |
2013 | host->max_channel = 0; | |
2014 | host->sg_tablesize = AHD_NSEG; | |
2015 | ahd_set_unit(ahd, ahd_linux_next_unit()); | |
2016 | sprintf(buf, "scsi%d", host->host_no); | |
2017 | new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); | |
2018 | if (new_name != NULL) { | |
2019 | strcpy(new_name, buf); | |
2020 | ahd_set_name(ahd, new_name); | |
2021 | } | |
2022 | host->unique_id = ahd->unit; | |
2023 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
2024 | scsi_set_pci_device(host, ahd->dev_softc); | |
2025 | #endif | |
2026 | ahd_linux_setup_user_rd_strm_settings(ahd); | |
2027 | ahd_linux_initialize_scsi_bus(ahd); | |
2028 | ahd_unlock(ahd, &s); | |
2029 | ahd->platform_data->dv_pid = kernel_thread(ahd_linux_dv_thread, ahd, 0); | |
2030 | ahd_lock(ahd, &s); | |
2031 | if (ahd->platform_data->dv_pid < 0) { | |
2032 | printf("%s: Failed to create DV thread, error= %d\n", | |
2033 | ahd_name(ahd), ahd->platform_data->dv_pid); | |
2034 | return (-ahd->platform_data->dv_pid); | |
2035 | } | |
2036 | /* | |
2037 | * Initially allocate *all* of our linux target objects | |
2038 | * so that the DV thread will scan them all in parallel | |
2039 | * just after driver initialization. Any device that | |
2040 | * does not exist will have its target object destroyed | |
2041 | * by the selection timeout handler. In the case of a | |
2042 | * device that appears after the initial DV scan, async | |
2043 | * negotiation will occur for the first command, and DV | |
2044 | * will comence should that first command be successful. | |
2045 | */ | |
2046 | for (target = 0; target < host->max_id; target++) { | |
2047 | ||
2048 | /* | |
2049 | * Skip our own ID. Some Compaq/HP storage devices | |
2050 | * have enclosure management devices that respond to | |
2051 | * single bit selection (i.e. selecting ourselves). | |
2052 | * It is expected that either an external application | |
2053 | * or a modified kernel will be used to probe this | |
2054 | * ID if it is appropriate. To accommodate these | |
2055 | * installations, ahc_linux_alloc_target() will allocate | |
2056 | * for our ID if asked to do so. | |
2057 | */ | |
2058 | if (target == ahd->our_id) | |
2059 | continue; | |
2060 | ||
2061 | ahd_linux_alloc_target(ahd, 0, target); | |
2062 | } | |
2063 | ahd_intr_enable(ahd, TRUE); | |
2064 | ahd_linux_start_dv(ahd); | |
2065 | ahd_unlock(ahd, &s); | |
2066 | ||
2067 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
2068 | scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */ | |
2069 | scsi_scan_host(host); | |
2070 | #endif | |
2071 | return (0); | |
2072 | } | |
2073 | ||
2074 | uint64_t | |
2075 | ahd_linux_get_memsize(void) | |
2076 | { | |
2077 | struct sysinfo si; | |
2078 | ||
2079 | si_meminfo(&si); | |
2080 | return ((uint64_t)si.totalram << PAGE_SHIFT); | |
2081 | } | |
2082 | ||
2083 | /* | |
2084 | * Find the smallest available unit number to use | |
2085 | * for a new device. We don't just use a static | |
2086 | * count to handle the "repeated hot-(un)plug" | |
2087 | * scenario. | |
2088 | */ | |
2089 | static int | |
2090 | ahd_linux_next_unit(void) | |
2091 | { | |
2092 | struct ahd_softc *ahd; | |
2093 | int unit; | |
2094 | ||
2095 | unit = 0; | |
2096 | retry: | |
2097 | TAILQ_FOREACH(ahd, &ahd_tailq, links) { | |
2098 | if (ahd->unit == unit) { | |
2099 | unit++; | |
2100 | goto retry; | |
2101 | } | |
2102 | } | |
2103 | return (unit); | |
2104 | } | |
2105 | ||
2106 | /* | |
2107 | * Place the SCSI bus into a known state by either resetting it, | |
2108 | * or forcing transfer negotiations on the next command to any | |
2109 | * target. | |
2110 | */ | |
2111 | static void | |
2112 | ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) | |
2113 | { | |
2114 | u_int target_id; | |
2115 | u_int numtarg; | |
2116 | ||
2117 | target_id = 0; | |
2118 | numtarg = 0; | |
2119 | ||
2120 | if (aic79xx_no_reset != 0) | |
2121 | ahd->flags &= ~AHD_RESET_BUS_A; | |
2122 | ||
2123 | if ((ahd->flags & AHD_RESET_BUS_A) != 0) | |
2124 | ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); | |
2125 | else | |
2126 | numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; | |
2127 | ||
2128 | /* | |
2129 | * Force negotiation to async for all targets that | |
2130 | * will not see an initial bus reset. | |
2131 | */ | |
2132 | for (; target_id < numtarg; target_id++) { | |
2133 | struct ahd_devinfo devinfo; | |
2134 | struct ahd_initiator_tinfo *tinfo; | |
2135 | struct ahd_tmode_tstate *tstate; | |
2136 | ||
2137 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, | |
2138 | target_id, &tstate); | |
2139 | ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, | |
2140 | CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); | |
2141 | ahd_update_neg_request(ahd, &devinfo, tstate, | |
2142 | tinfo, AHD_NEG_ALWAYS); | |
2143 | } | |
2144 | /* Give the bus some time to recover */ | |
2145 | if ((ahd->flags & AHD_RESET_BUS_A) != 0) { | |
2146 | ahd_freeze_simq(ahd); | |
2147 | init_timer(&ahd->platform_data->reset_timer); | |
2148 | ahd->platform_data->reset_timer.data = (u_long)ahd; | |
2149 | ahd->platform_data->reset_timer.expires = | |
2150 | jiffies + (AIC79XX_RESET_DELAY * HZ)/1000; | |
2151 | ahd->platform_data->reset_timer.function = | |
2152 | (ahd_linux_callback_t *)ahd_release_simq; | |
2153 | add_timer(&ahd->platform_data->reset_timer); | |
2154 | } | |
2155 | } | |
2156 | ||
2157 | int | |
2158 | ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) | |
2159 | { | |
2160 | ahd->platform_data = | |
2161 | malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT); | |
2162 | if (ahd->platform_data == NULL) | |
2163 | return (ENOMEM); | |
2164 | memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); | |
2165 | TAILQ_INIT(&ahd->platform_data->completeq); | |
2166 | TAILQ_INIT(&ahd->platform_data->device_runq); | |
2167 | ahd->platform_data->irq = AHD_LINUX_NOIRQ; | |
2168 | ahd->platform_data->hw_dma_mask = 0xFFFFFFFF; | |
2169 | ahd_lockinit(ahd); | |
2170 | ahd_done_lockinit(ahd); | |
2171 | init_timer(&ahd->platform_data->completeq_timer); | |
2172 | ahd->platform_data->completeq_timer.data = (u_long)ahd; | |
2173 | ahd->platform_data->completeq_timer.function = | |
2174 | (ahd_linux_callback_t *)ahd_linux_thread_run_complete_queue; | |
2175 | init_MUTEX_LOCKED(&ahd->platform_data->eh_sem); | |
2176 | init_MUTEX_LOCKED(&ahd->platform_data->dv_sem); | |
2177 | init_MUTEX_LOCKED(&ahd->platform_data->dv_cmd_sem); | |
2178 | ahd_setup_runq_tasklet(ahd); | |
2179 | ahd->seltime = (aic79xx_seltime & 0x3) << 4; | |
2180 | return (0); | |
2181 | } | |
2182 | ||
2183 | void | |
2184 | ahd_platform_free(struct ahd_softc *ahd) | |
2185 | { | |
2186 | struct ahd_linux_target *targ; | |
2187 | struct ahd_linux_device *dev; | |
2188 | int i, j; | |
2189 | ||
2190 | if (ahd->platform_data != NULL) { | |
2191 | del_timer_sync(&ahd->platform_data->completeq_timer); | |
2192 | ahd_linux_kill_dv_thread(ahd); | |
2193 | ahd_teardown_runq_tasklet(ahd); | |
2194 | if (ahd->platform_data->host != NULL) { | |
2195 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
2196 | scsi_remove_host(ahd->platform_data->host); | |
2197 | #endif | |
2198 | scsi_host_put(ahd->platform_data->host); | |
2199 | } | |
2200 | ||
2201 | /* destroy all of the device and target objects */ | |
2202 | for (i = 0; i < AHD_NUM_TARGETS; i++) { | |
2203 | targ = ahd->platform_data->targets[i]; | |
2204 | if (targ != NULL) { | |
2205 | /* Keep target around through the loop. */ | |
2206 | targ->refcount++; | |
2207 | for (j = 0; j < AHD_NUM_LUNS; j++) { | |
2208 | ||
2209 | if (targ->devices[j] == NULL) | |
2210 | continue; | |
2211 | dev = targ->devices[j]; | |
2212 | ahd_linux_free_device(ahd, dev); | |
2213 | } | |
2214 | /* | |
2215 | * Forcibly free the target now that | |
2216 | * all devices are gone. | |
2217 | */ | |
2218 | ahd_linux_free_target(ahd, targ); | |
2219 | } | |
2220 | } | |
2221 | ||
2222 | if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) | |
2223 | free_irq(ahd->platform_data->irq, ahd); | |
2224 | if (ahd->tags[0] == BUS_SPACE_PIO | |
2225 | && ahd->bshs[0].ioport != 0) | |
2226 | release_region(ahd->bshs[0].ioport, 256); | |
2227 | if (ahd->tags[1] == BUS_SPACE_PIO | |
2228 | && ahd->bshs[1].ioport != 0) | |
2229 | release_region(ahd->bshs[1].ioport, 256); | |
2230 | if (ahd->tags[0] == BUS_SPACE_MEMIO | |
2231 | && ahd->bshs[0].maddr != NULL) { | |
2232 | iounmap(ahd->bshs[0].maddr); | |
2233 | release_mem_region(ahd->platform_data->mem_busaddr, | |
2234 | 0x1000); | |
2235 | } | |
2236 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
2237 | /* | |
2238 | * In 2.4 we detach from the scsi midlayer before the PCI | |
2239 | * layer invokes our remove callback. No per-instance | |
2240 | * detach is provided, so we must reach inside the PCI | |
2241 | * subsystem's internals and detach our driver manually. | |
2242 | */ | |
2243 | if (ahd->dev_softc != NULL) | |
2244 | ahd->dev_softc->driver = NULL; | |
2245 | #endif | |
2246 | free(ahd->platform_data, M_DEVBUF); | |
2247 | } | |
2248 | } | |
2249 | ||
2250 | void | |
2251 | ahd_platform_init(struct ahd_softc *ahd) | |
2252 | { | |
2253 | /* | |
2254 | * Lookup and commit any modified IO Cell options. | |
2255 | */ | |
2256 | if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) { | |
2257 | struct ahd_linux_iocell_opts *iocell_opts; | |
2258 | ||
2259 | iocell_opts = &aic79xx_iocell_info[ahd->unit]; | |
2260 | if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) | |
2261 | AHD_SET_PRECOMP(ahd, iocell_opts->precomp); | |
2262 | if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) | |
2263 | AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); | |
2264 | if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) | |
2265 | AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); | |
2266 | } | |
2267 | ||
2268 | } | |
2269 | ||
2270 | void | |
2271 | ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) | |
2272 | { | |
2273 | ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), | |
2274 | SCB_GET_CHANNEL(ahd, scb), | |
2275 | SCB_GET_LUN(scb), SCB_LIST_NULL, | |
2276 | ROLE_UNKNOWN, CAM_REQUEUE_REQ); | |
2277 | } | |
2278 | ||
2279 | void | |
2280 | ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, | |
2281 | ahd_queue_alg alg) | |
2282 | { | |
2283 | struct ahd_linux_device *dev; | |
2284 | int was_queuing; | |
2285 | int now_queuing; | |
2286 | ||
2287 | dev = ahd_linux_get_device(ahd, devinfo->channel - 'A', | |
2288 | devinfo->target, | |
2289 | devinfo->lun, /*alloc*/FALSE); | |
2290 | if (dev == NULL) | |
2291 | return; | |
2292 | was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); | |
2293 | switch (alg) { | |
2294 | default: | |
2295 | case AHD_QUEUE_NONE: | |
2296 | now_queuing = 0; | |
2297 | break; | |
2298 | case AHD_QUEUE_BASIC: | |
2299 | now_queuing = AHD_DEV_Q_BASIC; | |
2300 | break; | |
2301 | case AHD_QUEUE_TAGGED: | |
2302 | now_queuing = AHD_DEV_Q_TAGGED; | |
2303 | break; | |
2304 | } | |
2305 | if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 | |
2306 | && (was_queuing != now_queuing) | |
2307 | && (dev->active != 0)) { | |
2308 | dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; | |
2309 | dev->qfrozen++; | |
2310 | } | |
2311 | ||
2312 | dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); | |
2313 | if (now_queuing) { | |
2314 | u_int usertags; | |
2315 | ||
2316 | usertags = ahd_linux_user_tagdepth(ahd, devinfo); | |
2317 | if (!was_queuing) { | |
2318 | /* | |
2319 | * Start out agressively and allow our | |
2320 | * dynamic queue depth algorithm to take | |
2321 | * care of the rest. | |
2322 | */ | |
2323 | dev->maxtags = usertags; | |
2324 | dev->openings = dev->maxtags - dev->active; | |
2325 | } | |
2326 | if (dev->maxtags == 0) { | |
2327 | /* | |
2328 | * Queueing is disabled by the user. | |
2329 | */ | |
2330 | dev->openings = 1; | |
2331 | } else if (alg == AHD_QUEUE_TAGGED) { | |
2332 | dev->flags |= AHD_DEV_Q_TAGGED; | |
2333 | if (aic79xx_periodic_otag != 0) | |
2334 | dev->flags |= AHD_DEV_PERIODIC_OTAG; | |
2335 | } else | |
2336 | dev->flags |= AHD_DEV_Q_BASIC; | |
2337 | } else { | |
2338 | /* We can only have one opening. */ | |
2339 | dev->maxtags = 0; | |
2340 | dev->openings = 1 - dev->active; | |
2341 | } | |
2342 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
2343 | if (dev->scsi_device != NULL) { | |
2344 | switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { | |
2345 | case AHD_DEV_Q_BASIC: | |
2346 | scsi_adjust_queue_depth(dev->scsi_device, | |
2347 | MSG_SIMPLE_TASK, | |
2348 | dev->openings + dev->active); | |
2349 | break; | |
2350 | case AHD_DEV_Q_TAGGED: | |
2351 | scsi_adjust_queue_depth(dev->scsi_device, | |
2352 | MSG_ORDERED_TASK, | |
2353 | dev->openings + dev->active); | |
2354 | break; | |
2355 | default: | |
2356 | /* | |
2357 | * We allow the OS to queue 2 untagged transactions to | |
2358 | * us at any time even though we can only execute them | |
2359 | * serially on the controller/device. This should | |
2360 | * remove some latency. | |
2361 | */ | |
2362 | scsi_adjust_queue_depth(dev->scsi_device, | |
2363 | /*NON-TAGGED*/0, | |
2364 | /*queue depth*/2); | |
2365 | break; | |
2366 | } | |
2367 | } | |
2368 | #endif | |
2369 | } | |
2370 | ||
2371 | int | |
2372 | ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, | |
2373 | int lun, u_int tag, role_t role, uint32_t status) | |
2374 | { | |
2375 | int targ; | |
2376 | int maxtarg; | |
2377 | int maxlun; | |
2378 | int clun; | |
2379 | int count; | |
2380 | ||
2381 | if (tag != SCB_LIST_NULL) | |
2382 | return (0); | |
2383 | ||
2384 | targ = 0; | |
2385 | if (target != CAM_TARGET_WILDCARD) { | |
2386 | targ = target; | |
2387 | maxtarg = targ + 1; | |
2388 | } else { | |
2389 | maxtarg = (ahd->features & AHD_WIDE) ? 16 : 8; | |
2390 | } | |
2391 | clun = 0; | |
2392 | if (lun != CAM_LUN_WILDCARD) { | |
2393 | clun = lun; | |
2394 | maxlun = clun + 1; | |
2395 | } else { | |
2396 | maxlun = AHD_NUM_LUNS; | |
2397 | } | |
2398 | ||
2399 | count = 0; | |
2400 | for (; targ < maxtarg; targ++) { | |
2401 | ||
2402 | for (; clun < maxlun; clun++) { | |
2403 | struct ahd_linux_device *dev; | |
2404 | struct ahd_busyq *busyq; | |
2405 | struct ahd_cmd *acmd; | |
2406 | ||
2407 | dev = ahd_linux_get_device(ahd, /*chan*/0, targ, | |
2408 | clun, /*alloc*/FALSE); | |
2409 | if (dev == NULL) | |
2410 | continue; | |
2411 | ||
2412 | busyq = &dev->busyq; | |
2413 | while ((acmd = TAILQ_FIRST(busyq)) != NULL) { | |
2414 | Scsi_Cmnd *cmd; | |
2415 | ||
2416 | cmd = &acmd_scsi_cmd(acmd); | |
2417 | TAILQ_REMOVE(busyq, acmd, | |
2418 | acmd_links.tqe); | |
2419 | count++; | |
2420 | cmd->result = status << 16; | |
2421 | ahd_linux_queue_cmd_complete(ahd, cmd); | |
2422 | } | |
2423 | } | |
2424 | } | |
2425 | ||
2426 | return (count); | |
2427 | } | |
2428 | ||
2429 | static void | |
2430 | ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd) | |
2431 | { | |
2432 | u_long flags; | |
2433 | ||
2434 | ahd_lock(ahd, &flags); | |
2435 | del_timer(&ahd->platform_data->completeq_timer); | |
2436 | ahd->platform_data->flags &= ~AHD_RUN_CMPLT_Q_TIMER; | |
2437 | ahd_linux_run_complete_queue(ahd); | |
2438 | ahd_unlock(ahd, &flags); | |
2439 | } | |
2440 | ||
2441 | static void | |
2442 | ahd_linux_start_dv(struct ahd_softc *ahd) | |
2443 | { | |
2444 | ||
2445 | /* | |
2446 | * Freeze the simq and signal ahd_linux_queue to not let any | |
2447 | * more commands through | |
2448 | */ | |
2449 | if ((ahd->platform_data->flags & AHD_DV_ACTIVE) == 0) { | |
2450 | #ifdef AHD_DEBUG | |
2451 | if (ahd_debug & AHD_SHOW_DV) | |
2452 | printf("%s: Starting DV\n", ahd_name(ahd)); | |
2453 | #endif | |
2454 | ||
2455 | ahd->platform_data->flags |= AHD_DV_ACTIVE; | |
2456 | ahd_freeze_simq(ahd); | |
2457 | ||
2458 | /* Wake up the DV kthread */ | |
2459 | up(&ahd->platform_data->dv_sem); | |
2460 | } | |
2461 | } | |
2462 | ||
2463 | static int | |
2464 | ahd_linux_dv_thread(void *data) | |
2465 | { | |
2466 | struct ahd_softc *ahd; | |
2467 | int target; | |
2468 | u_long s; | |
2469 | ||
2470 | ahd = (struct ahd_softc *)data; | |
2471 | ||
2472 | #ifdef AHD_DEBUG | |
2473 | if (ahd_debug & AHD_SHOW_DV) | |
2474 | printf("In DV Thread\n"); | |
2475 | #endif | |
2476 | ||
2477 | /* | |
2478 | * Complete thread creation. | |
2479 | */ | |
2480 | lock_kernel(); | |
2481 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,60) | |
2482 | /* | |
2483 | * Don't care about any signals. | |
2484 | */ | |
2485 | siginitsetinv(¤t->blocked, 0); | |
2486 | ||
2487 | daemonize(); | |
2488 | sprintf(current->comm, "ahd_dv_%d", ahd->unit); | |
2489 | #else | |
2490 | daemonize("ahd_dv_%d", ahd->unit); | |
2491 | current->flags |= PF_FREEZE; | |
2492 | #endif | |
2493 | unlock_kernel(); | |
2494 | ||
2495 | while (1) { | |
2496 | /* | |
2497 | * Use down_interruptible() rather than down() to | |
2498 | * avoid inclusion in the load average. | |
2499 | */ | |
2500 | down_interruptible(&ahd->platform_data->dv_sem); | |
2501 | ||
2502 | /* Check to see if we've been signaled to exit */ | |
2503 | ahd_lock(ahd, &s); | |
2504 | if ((ahd->platform_data->flags & AHD_DV_SHUTDOWN) != 0) { | |
2505 | ahd_unlock(ahd, &s); | |
2506 | break; | |
2507 | } | |
2508 | ahd_unlock(ahd, &s); | |
2509 | ||
2510 | #ifdef AHD_DEBUG | |
2511 | if (ahd_debug & AHD_SHOW_DV) | |
2512 | printf("%s: Beginning Domain Validation\n", | |
2513 | ahd_name(ahd)); | |
2514 | #endif | |
2515 | ||
2516 | /* | |
2517 | * Wait for any pending commands to drain before proceeding. | |
2518 | */ | |
2519 | ahd_lock(ahd, &s); | |
2520 | while (LIST_FIRST(&ahd->pending_scbs) != NULL) { | |
2521 | ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_EMPTY; | |
2522 | ahd_unlock(ahd, &s); | |
2523 | down_interruptible(&ahd->platform_data->dv_sem); | |
2524 | ahd_lock(ahd, &s); | |
2525 | } | |
2526 | ||
2527 | /* | |
2528 | * Wait for the SIMQ to be released so that DV is the | |
2529 | * only reason the queue is frozen. | |
2530 | */ | |
2531 | while (AHD_DV_SIMQ_FROZEN(ahd) == 0) { | |
2532 | ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE; | |
2533 | ahd_unlock(ahd, &s); | |
2534 | down_interruptible(&ahd->platform_data->dv_sem); | |
2535 | ahd_lock(ahd, &s); | |
2536 | } | |
2537 | ahd_unlock(ahd, &s); | |
2538 | ||
2539 | for (target = 0; target < AHD_NUM_TARGETS; target++) | |
2540 | ahd_linux_dv_target(ahd, target); | |
2541 | ||
2542 | ahd_lock(ahd, &s); | |
2543 | ahd->platform_data->flags &= ~AHD_DV_ACTIVE; | |
2544 | ahd_unlock(ahd, &s); | |
2545 | ||
2546 | /* | |
2547 | * Release the SIMQ so that normal commands are | |
2548 | * allowed to continue on the bus. | |
2549 | */ | |
2550 | ahd_release_simq(ahd); | |
2551 | } | |
2552 | up(&ahd->platform_data->eh_sem); | |
2553 | return (0); | |
2554 | } | |
2555 | ||
2556 | static void | |
2557 | ahd_linux_kill_dv_thread(struct ahd_softc *ahd) | |
2558 | { | |
2559 | u_long s; | |
2560 | ||
2561 | ahd_lock(ahd, &s); | |
2562 | if (ahd->platform_data->dv_pid != 0) { | |
2563 | ahd->platform_data->flags |= AHD_DV_SHUTDOWN; | |
2564 | ahd_unlock(ahd, &s); | |
2565 | up(&ahd->platform_data->dv_sem); | |
2566 | ||
2567 | /* | |
2568 | * Use the eh_sem as an indicator that the | |
2569 | * dv thread is exiting. Note that the dv | |
2570 | * thread must still return after performing | |
2571 | * the up on our semaphore before it has | |
2572 | * completely exited this module. Unfortunately, | |
2573 | * there seems to be no easy way to wait for the | |
2574 | * exit of a thread for which you are not the | |
2575 | * parent (dv threads are parented by init). | |
2576 | * Cross your fingers... | |
2577 | */ | |
2578 | down(&ahd->platform_data->eh_sem); | |
2579 | ||
2580 | /* | |
2581 | * Mark the dv thread as already dead. This | |
2582 | * avoids attempting to kill it a second time. | |
2583 | * This is necessary because we must kill the | |
2584 | * DV thread before calling ahd_free() in the | |
2585 | * module shutdown case to avoid bogus locking | |
2586 | * in the SCSI mid-layer, but we ahd_free() is | |
2587 | * called without killing the DV thread in the | |
2588 | * instance detach case, so ahd_platform_free() | |
2589 | * calls us again to verify that the DV thread | |
2590 | * is dead. | |
2591 | */ | |
2592 | ahd->platform_data->dv_pid = 0; | |
2593 | } else { | |
2594 | ahd_unlock(ahd, &s); | |
2595 | } | |
2596 | } | |
2597 | ||
2598 | #define AHD_LINUX_DV_INQ_SHORT_LEN 36 | |
2599 | #define AHD_LINUX_DV_INQ_LEN 256 | |
2600 | #define AHD_LINUX_DV_TIMEOUT (HZ / 4) | |
2601 | ||
2602 | #define AHD_SET_DV_STATE(ahd, targ, newstate) \ | |
2603 | ahd_set_dv_state(ahd, targ, newstate, __LINE__) | |
2604 | ||
2605 | static __inline void | |
2606 | ahd_set_dv_state(struct ahd_softc *ahd, struct ahd_linux_target *targ, | |
2607 | ahd_dv_state newstate, u_int line) | |
2608 | { | |
2609 | ahd_dv_state oldstate; | |
2610 | ||
2611 | oldstate = targ->dv_state; | |
2612 | #ifdef AHD_DEBUG | |
2613 | if (ahd_debug & AHD_SHOW_DV) | |
2614 | printf("%s:%d: Going from state %d to state %d\n", | |
2615 | ahd_name(ahd), line, oldstate, newstate); | |
2616 | #endif | |
2617 | ||
2618 | if (oldstate == newstate) | |
2619 | targ->dv_state_retry++; | |
2620 | else | |
2621 | targ->dv_state_retry = 0; | |
2622 | targ->dv_state = newstate; | |
2623 | } | |
2624 | ||
2625 | static void | |
2626 | ahd_linux_dv_target(struct ahd_softc *ahd, u_int target_offset) | |
2627 | { | |
2628 | struct ahd_devinfo devinfo; | |
2629 | struct ahd_linux_target *targ; | |
2630 | struct scsi_cmnd *cmd; | |
2631 | struct scsi_device *scsi_dev; | |
2632 | struct scsi_sense_data *sense; | |
2633 | uint8_t *buffer; | |
2634 | u_long s; | |
2635 | u_int timeout; | |
2636 | int echo_size; | |
2637 | ||
2638 | sense = NULL; | |
2639 | buffer = NULL; | |
2640 | echo_size = 0; | |
2641 | ahd_lock(ahd, &s); | |
2642 | targ = ahd->platform_data->targets[target_offset]; | |
2643 | if (targ == NULL || (targ->flags & AHD_DV_REQUIRED) == 0) { | |
2644 | ahd_unlock(ahd, &s); | |
2645 | return; | |
2646 | } | |
2647 | ahd_compile_devinfo(&devinfo, ahd->our_id, targ->target, /*lun*/0, | |
2648 | targ->channel + 'A', ROLE_INITIATOR); | |
2649 | #ifdef AHD_DEBUG | |
2650 | if (ahd_debug & AHD_SHOW_DV) { | |
2651 | ahd_print_devinfo(ahd, &devinfo); | |
2652 | printf("Performing DV\n"); | |
2653 | } | |
2654 | #endif | |
2655 | ||
2656 | ahd_unlock(ahd, &s); | |
2657 | ||
2658 | cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK); | |
2659 | scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK); | |
2660 | scsi_dev->host = ahd->platform_data->host; | |
2661 | scsi_dev->id = devinfo.target; | |
2662 | scsi_dev->lun = devinfo.lun; | |
2663 | scsi_dev->channel = devinfo.channel - 'A'; | |
2664 | ahd->platform_data->dv_scsi_dev = scsi_dev; | |
2665 | ||
2666 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2667 | ||
2668 | while (targ->dv_state != AHD_DV_STATE_EXIT) { | |
2669 | timeout = AHD_LINUX_DV_TIMEOUT; | |
2670 | switch (targ->dv_state) { | |
2671 | case AHD_DV_STATE_INQ_SHORT_ASYNC: | |
2672 | case AHD_DV_STATE_INQ_ASYNC: | |
2673 | case AHD_DV_STATE_INQ_ASYNC_VERIFY: | |
2674 | /* | |
2675 | * Set things to async narrow to reduce the | |
2676 | * chance that the INQ will fail. | |
2677 | */ | |
2678 | ahd_lock(ahd, &s); | |
2679 | ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, | |
2680 | AHD_TRANS_GOAL, /*paused*/FALSE); | |
2681 | ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, | |
2682 | AHD_TRANS_GOAL, /*paused*/FALSE); | |
2683 | ahd_unlock(ahd, &s); | |
2684 | timeout = 10 * HZ; | |
2685 | targ->flags &= ~AHD_INQ_VALID; | |
2686 | /* FALLTHROUGH */ | |
2687 | case AHD_DV_STATE_INQ_VERIFY: | |
2688 | { | |
2689 | u_int inq_len; | |
2690 | ||
2691 | if (targ->dv_state == AHD_DV_STATE_INQ_SHORT_ASYNC) | |
2692 | inq_len = AHD_LINUX_DV_INQ_SHORT_LEN; | |
2693 | else | |
2694 | inq_len = targ->inq_data->additional_length + 5; | |
2695 | ahd_linux_dv_inq(ahd, cmd, &devinfo, targ, inq_len); | |
2696 | break; | |
2697 | } | |
2698 | case AHD_DV_STATE_TUR: | |
2699 | case AHD_DV_STATE_BUSY: | |
2700 | timeout = 5 * HZ; | |
2701 | ahd_linux_dv_tur(ahd, cmd, &devinfo); | |
2702 | break; | |
2703 | case AHD_DV_STATE_REBD: | |
2704 | ahd_linux_dv_rebd(ahd, cmd, &devinfo, targ); | |
2705 | break; | |
2706 | case AHD_DV_STATE_WEB: | |
2707 | ahd_linux_dv_web(ahd, cmd, &devinfo, targ); | |
2708 | break; | |
2709 | ||
2710 | case AHD_DV_STATE_REB: | |
2711 | ahd_linux_dv_reb(ahd, cmd, &devinfo, targ); | |
2712 | break; | |
2713 | ||
2714 | case AHD_DV_STATE_SU: | |
2715 | ahd_linux_dv_su(ahd, cmd, &devinfo, targ); | |
2716 | timeout = 50 * HZ; | |
2717 | break; | |
2718 | ||
2719 | default: | |
2720 | ahd_print_devinfo(ahd, &devinfo); | |
2721 | printf("Unknown DV state %d\n", targ->dv_state); | |
2722 | goto out; | |
2723 | } | |
2724 | ||
2725 | /* Queue the command and wait for it to complete */ | |
2726 | /* Abuse eh_timeout in the scsi_cmnd struct for our purposes */ | |
2727 | init_timer(&cmd->eh_timeout); | |
2728 | #ifdef AHD_DEBUG | |
2729 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) | |
2730 | /* | |
2731 | * All of the printfs during negotiation | |
2732 | * really slow down the negotiation. | |
2733 | * Add a bit of time just to be safe. | |
2734 | */ | |
2735 | timeout += HZ; | |
2736 | #endif | |
2737 | scsi_add_timer(cmd, timeout, ahd_linux_dv_timeout); | |
2738 | /* | |
2739 | * In 2.5.X, it is assumed that all calls from the | |
2740 | * "midlayer" (which we are emulating) will have the | |
2741 | * ahd host lock held. For other kernels, the | |
2742 | * io_request_lock must be held. | |
2743 | */ | |
2744 | #if AHD_SCSI_HAS_HOST_LOCK != 0 | |
2745 | ahd_lock(ahd, &s); | |
2746 | #else | |
2747 | spin_lock_irqsave(&io_request_lock, s); | |
2748 | #endif | |
2749 | ahd_linux_queue(cmd, ahd_linux_dv_complete); | |
2750 | #if AHD_SCSI_HAS_HOST_LOCK != 0 | |
2751 | ahd_unlock(ahd, &s); | |
2752 | #else | |
2753 | spin_unlock_irqrestore(&io_request_lock, s); | |
2754 | #endif | |
2755 | down_interruptible(&ahd->platform_data->dv_cmd_sem); | |
2756 | /* | |
2757 | * Wait for the SIMQ to be released so that DV is the | |
2758 | * only reason the queue is frozen. | |
2759 | */ | |
2760 | ahd_lock(ahd, &s); | |
2761 | while (AHD_DV_SIMQ_FROZEN(ahd) == 0) { | |
2762 | ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE; | |
2763 | ahd_unlock(ahd, &s); | |
2764 | down_interruptible(&ahd->platform_data->dv_sem); | |
2765 | ahd_lock(ahd, &s); | |
2766 | } | |
2767 | ahd_unlock(ahd, &s); | |
2768 | ||
2769 | ahd_linux_dv_transition(ahd, cmd, &devinfo, targ); | |
2770 | } | |
2771 | ||
2772 | out: | |
2773 | if ((targ->flags & AHD_INQ_VALID) != 0 | |
2774 | && ahd_linux_get_device(ahd, devinfo.channel - 'A', | |
2775 | devinfo.target, devinfo.lun, | |
2776 | /*alloc*/FALSE) == NULL) { | |
2777 | /* | |
2778 | * The DV state machine failed to configure this device. | |
2779 | * This is normal if DV is disabled. Since we have inquiry | |
2780 | * data, filter it and use the "optimistic" negotiation | |
2781 | * parameters found in the inquiry string. | |
2782 | */ | |
2783 | ahd_linux_filter_inquiry(ahd, &devinfo); | |
2784 | if ((targ->flags & (AHD_BASIC_DV|AHD_ENHANCED_DV)) != 0) { | |
2785 | ahd_print_devinfo(ahd, &devinfo); | |
2786 | printf("DV failed to configure device. " | |
2787 | "Please file a bug report against " | |
2788 | "this driver.\n"); | |
2789 | } | |
2790 | } | |
2791 | ||
2792 | if (cmd != NULL) | |
2793 | free(cmd, M_DEVBUF); | |
2794 | ||
2795 | if (ahd->platform_data->dv_scsi_dev != NULL) { | |
2796 | free(ahd->platform_data->dv_scsi_dev, M_DEVBUF); | |
2797 | ahd->platform_data->dv_scsi_dev = NULL; | |
2798 | } | |
2799 | ||
2800 | ahd_lock(ahd, &s); | |
2801 | if (targ->dv_buffer != NULL) { | |
2802 | free(targ->dv_buffer, M_DEVBUF); | |
2803 | targ->dv_buffer = NULL; | |
2804 | } | |
2805 | if (targ->dv_buffer1 != NULL) { | |
2806 | free(targ->dv_buffer1, M_DEVBUF); | |
2807 | targ->dv_buffer1 = NULL; | |
2808 | } | |
2809 | targ->flags &= ~AHD_DV_REQUIRED; | |
2810 | if (targ->refcount == 0) | |
2811 | ahd_linux_free_target(ahd, targ); | |
2812 | ahd_unlock(ahd, &s); | |
2813 | } | |
2814 | ||
2815 | static __inline int | |
2816 | ahd_linux_dv_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) | |
2817 | { | |
2818 | u_long s; | |
2819 | int retval; | |
2820 | ||
2821 | ahd_lock(ahd, &s); | |
2822 | retval = ahd_linux_fallback(ahd, devinfo); | |
2823 | ahd_unlock(ahd, &s); | |
2824 | ||
2825 | return (retval); | |
2826 | } | |
2827 | ||
2828 | static void | |
2829 | ahd_linux_dv_transition(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
2830 | struct ahd_devinfo *devinfo, | |
2831 | struct ahd_linux_target *targ) | |
2832 | { | |
2833 | u_int32_t status; | |
2834 | ||
2835 | status = aic_error_action(cmd, targ->inq_data, | |
2836 | ahd_cmd_get_transaction_status(cmd), | |
2837 | ahd_cmd_get_scsi_status(cmd)); | |
2838 | ||
2839 | ||
2840 | #ifdef AHD_DEBUG | |
2841 | if (ahd_debug & AHD_SHOW_DV) { | |
2842 | ahd_print_devinfo(ahd, devinfo); | |
2843 | printf("Entering ahd_linux_dv_transition, state= %d, " | |
2844 | "status= 0x%x, cmd->result= 0x%x\n", targ->dv_state, | |
2845 | status, cmd->result); | |
2846 | } | |
2847 | #endif | |
2848 | ||
2849 | switch (targ->dv_state) { | |
2850 | case AHD_DV_STATE_INQ_SHORT_ASYNC: | |
2851 | case AHD_DV_STATE_INQ_ASYNC: | |
2852 | switch (status & SS_MASK) { | |
2853 | case SS_NOP: | |
2854 | { | |
2855 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1); | |
2856 | break; | |
2857 | } | |
2858 | case SS_INQ_REFRESH: | |
2859 | AHD_SET_DV_STATE(ahd, targ, | |
2860 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2861 | break; | |
2862 | case SS_TUR: | |
2863 | case SS_RETRY: | |
2864 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2865 | if (ahd_cmd_get_transaction_status(cmd) | |
2866 | == CAM_REQUEUE_REQ) | |
2867 | targ->dv_state_retry--; | |
2868 | if ((status & SS_ERRMASK) == EBUSY) | |
2869 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); | |
2870 | if (targ->dv_state_retry < 10) | |
2871 | break; | |
2872 | /* FALLTHROUGH */ | |
2873 | default: | |
2874 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2875 | #ifdef AHD_DEBUG | |
2876 | if (ahd_debug & AHD_SHOW_DV) { | |
2877 | ahd_print_devinfo(ahd, devinfo); | |
2878 | printf("Failed DV inquiry, skipping\n"); | |
2879 | } | |
2880 | #endif | |
2881 | break; | |
2882 | } | |
2883 | break; | |
2884 | case AHD_DV_STATE_INQ_ASYNC_VERIFY: | |
2885 | switch (status & SS_MASK) { | |
2886 | case SS_NOP: | |
2887 | { | |
2888 | u_int xportflags; | |
2889 | u_int spi3data; | |
2890 | ||
2891 | if (memcmp(targ->inq_data, targ->dv_buffer, | |
2892 | AHD_LINUX_DV_INQ_LEN) != 0) { | |
2893 | /* | |
2894 | * Inquiry data must have changed. | |
2895 | * Try from the top again. | |
2896 | */ | |
2897 | AHD_SET_DV_STATE(ahd, targ, | |
2898 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2899 | break; | |
2900 | } | |
2901 | ||
2902 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1); | |
2903 | targ->flags |= AHD_INQ_VALID; | |
2904 | if (ahd_linux_user_dv_setting(ahd) == 0) | |
2905 | break; | |
2906 | ||
2907 | xportflags = targ->inq_data->flags; | |
2908 | if ((xportflags & (SID_Sync|SID_WBus16)) == 0) | |
2909 | break; | |
2910 | ||
2911 | spi3data = targ->inq_data->spi3data; | |
2912 | switch (spi3data & SID_SPI_CLOCK_DT_ST) { | |
2913 | default: | |
2914 | case SID_SPI_CLOCK_ST: | |
2915 | /* Assume only basic DV is supported. */ | |
2916 | targ->flags |= AHD_BASIC_DV; | |
2917 | break; | |
2918 | case SID_SPI_CLOCK_DT: | |
2919 | case SID_SPI_CLOCK_DT_ST: | |
2920 | targ->flags |= AHD_ENHANCED_DV; | |
2921 | break; | |
2922 | } | |
2923 | break; | |
2924 | } | |
2925 | case SS_INQ_REFRESH: | |
2926 | AHD_SET_DV_STATE(ahd, targ, | |
2927 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2928 | break; | |
2929 | case SS_TUR: | |
2930 | case SS_RETRY: | |
2931 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2932 | if (ahd_cmd_get_transaction_status(cmd) | |
2933 | == CAM_REQUEUE_REQ) | |
2934 | targ->dv_state_retry--; | |
2935 | ||
2936 | if ((status & SS_ERRMASK) == EBUSY) | |
2937 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); | |
2938 | if (targ->dv_state_retry < 10) | |
2939 | break; | |
2940 | /* FALLTHROUGH */ | |
2941 | default: | |
2942 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2943 | #ifdef AHD_DEBUG | |
2944 | if (ahd_debug & AHD_SHOW_DV) { | |
2945 | ahd_print_devinfo(ahd, devinfo); | |
2946 | printf("Failed DV inquiry, skipping\n"); | |
2947 | } | |
2948 | #endif | |
2949 | break; | |
2950 | } | |
2951 | break; | |
2952 | case AHD_DV_STATE_INQ_VERIFY: | |
2953 | switch (status & SS_MASK) { | |
2954 | case SS_NOP: | |
2955 | { | |
2956 | ||
2957 | if (memcmp(targ->inq_data, targ->dv_buffer, | |
2958 | AHD_LINUX_DV_INQ_LEN) == 0) { | |
2959 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2960 | break; | |
2961 | } | |
2962 | ||
2963 | #ifdef AHD_DEBUG | |
2964 | if (ahd_debug & AHD_SHOW_DV) { | |
2965 | int i; | |
2966 | ||
2967 | ahd_print_devinfo(ahd, devinfo); | |
2968 | printf("Inquiry buffer mismatch:"); | |
2969 | for (i = 0; i < AHD_LINUX_DV_INQ_LEN; i++) { | |
2970 | if ((i & 0xF) == 0) | |
2971 | printf("\n "); | |
2972 | printf("0x%x:0x0%x ", | |
2973 | ((uint8_t *)targ->inq_data)[i], | |
2974 | targ->dv_buffer[i]); | |
2975 | } | |
2976 | printf("\n"); | |
2977 | } | |
2978 | #endif | |
2979 | ||
2980 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { | |
2981 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2982 | break; | |
2983 | } | |
2984 | /* | |
2985 | * Do not count "falling back" | |
2986 | * against our retries. | |
2987 | */ | |
2988 | targ->dv_state_retry = 0; | |
2989 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2990 | break; | |
2991 | } | |
2992 | case SS_INQ_REFRESH: | |
2993 | AHD_SET_DV_STATE(ahd, targ, | |
2994 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2995 | break; | |
2996 | case SS_TUR: | |
2997 | case SS_RETRY: | |
2998 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2999 | if (ahd_cmd_get_transaction_status(cmd) | |
3000 | == CAM_REQUEUE_REQ) { | |
3001 | targ->dv_state_retry--; | |
3002 | } else if ((status & SSQ_FALLBACK) != 0) { | |
3003 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { | |
3004 | AHD_SET_DV_STATE(ahd, targ, | |
3005 | AHD_DV_STATE_EXIT); | |
3006 | break; | |
3007 | } | |
3008 | /* | |
3009 | * Do not count "falling back" | |
3010 | * against our retries. | |
3011 | */ | |
3012 | targ->dv_state_retry = 0; | |
3013 | } else if ((status & SS_ERRMASK) == EBUSY) | |
3014 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); | |
3015 | if (targ->dv_state_retry < 10) | |
3016 | break; | |
3017 | /* FALLTHROUGH */ | |
3018 | default: | |
3019 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3020 | #ifdef AHD_DEBUG | |
3021 | if (ahd_debug & AHD_SHOW_DV) { | |
3022 | ahd_print_devinfo(ahd, devinfo); | |
3023 | printf("Failed DV inquiry, skipping\n"); | |
3024 | } | |
3025 | #endif | |
3026 | break; | |
3027 | } | |
3028 | break; | |
3029 | ||
3030 | case AHD_DV_STATE_TUR: | |
3031 | switch (status & SS_MASK) { | |
3032 | case SS_NOP: | |
3033 | if ((targ->flags & AHD_BASIC_DV) != 0) { | |
3034 | ahd_linux_filter_inquiry(ahd, devinfo); | |
3035 | AHD_SET_DV_STATE(ahd, targ, | |
3036 | AHD_DV_STATE_INQ_VERIFY); | |
3037 | } else if ((targ->flags & AHD_ENHANCED_DV) != 0) { | |
3038 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REBD); | |
3039 | } else { | |
3040 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3041 | } | |
3042 | break; | |
3043 | case SS_RETRY: | |
3044 | case SS_TUR: | |
3045 | if ((status & SS_ERRMASK) == EBUSY) { | |
3046 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); | |
3047 | break; | |
3048 | } | |
3049 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
3050 | if (ahd_cmd_get_transaction_status(cmd) | |
3051 | == CAM_REQUEUE_REQ) { | |
3052 | targ->dv_state_retry--; | |
3053 | } else if ((status & SSQ_FALLBACK) != 0) { | |
3054 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { | |
3055 | AHD_SET_DV_STATE(ahd, targ, | |
3056 | AHD_DV_STATE_EXIT); | |
3057 | break; | |
3058 | } | |
3059 | /* | |
3060 | * Do not count "falling back" | |
3061 | * against our retries. | |
3062 | */ | |
3063 | targ->dv_state_retry = 0; | |
3064 | } | |
3065 | if (targ->dv_state_retry >= 10) { | |
3066 | #ifdef AHD_DEBUG | |
3067 | if (ahd_debug & AHD_SHOW_DV) { | |
3068 | ahd_print_devinfo(ahd, devinfo); | |
3069 | printf("DV TUR reties exhausted\n"); | |
3070 | } | |
3071 | #endif | |
3072 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3073 | break; | |
3074 | } | |
3075 | if (status & SSQ_DELAY) | |
3076 | ssleep(1); | |
3077 | ||
3078 | break; | |
3079 | case SS_START: | |
3080 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_SU); | |
3081 | break; | |
3082 | case SS_INQ_REFRESH: | |
3083 | AHD_SET_DV_STATE(ahd, targ, | |
3084 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
3085 | break; | |
3086 | default: | |
3087 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3088 | break; | |
3089 | } | |
3090 | break; | |
3091 | ||
3092 | case AHD_DV_STATE_REBD: | |
3093 | switch (status & SS_MASK) { | |
3094 | case SS_NOP: | |
3095 | { | |
3096 | uint32_t echo_size; | |
3097 | ||
3098 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB); | |
3099 | echo_size = scsi_3btoul(&targ->dv_buffer[1]); | |
3100 | echo_size &= 0x1FFF; | |
3101 | #ifdef AHD_DEBUG | |
3102 | if (ahd_debug & AHD_SHOW_DV) { | |
3103 | ahd_print_devinfo(ahd, devinfo); | |
3104 | printf("Echo buffer size= %d\n", echo_size); | |
3105 | } | |
3106 | #endif | |
3107 | if (echo_size == 0) { | |
3108 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3109 | break; | |
3110 | } | |
3111 | ||
3112 | /* Generate the buffer pattern */ | |
3113 | targ->dv_echo_size = echo_size; | |
3114 | ahd_linux_generate_dv_pattern(targ); | |
3115 | /* | |
3116 | * Setup initial negotiation values. | |
3117 | */ | |
3118 | ahd_linux_filter_inquiry(ahd, devinfo); | |
3119 | break; | |
3120 | } | |
3121 | case SS_INQ_REFRESH: | |
3122 | AHD_SET_DV_STATE(ahd, targ, | |
3123 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
3124 | break; | |
3125 | case SS_RETRY: | |
3126 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
3127 | if (ahd_cmd_get_transaction_status(cmd) | |
3128 | == CAM_REQUEUE_REQ) | |
3129 | targ->dv_state_retry--; | |
3130 | if (targ->dv_state_retry <= 10) | |
3131 | break; | |
3132 | #ifdef AHD_DEBUG | |
3133 | if (ahd_debug & AHD_SHOW_DV) { | |
3134 | ahd_print_devinfo(ahd, devinfo); | |
3135 | printf("DV REBD reties exhausted\n"); | |
3136 | } | |
3137 | #endif | |
3138 | /* FALLTHROUGH */ | |
3139 | case SS_FATAL: | |
3140 | default: | |
3141 | /* | |
3142 | * Setup initial negotiation values | |
3143 | * and try level 1 DV. | |
3144 | */ | |
3145 | ahd_linux_filter_inquiry(ahd, devinfo); | |
3146 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_VERIFY); | |
3147 | targ->dv_echo_size = 0; | |
3148 | break; | |
3149 | } | |
3150 | break; | |
3151 | ||
3152 | case AHD_DV_STATE_WEB: | |
3153 | switch (status & SS_MASK) { | |
3154 | case SS_NOP: | |
3155 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REB); | |
3156 | break; | |
3157 | case SS_INQ_REFRESH: | |
3158 | AHD_SET_DV_STATE(ahd, targ, | |
3159 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
3160 | break; | |
3161 | case SS_RETRY: | |
3162 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
3163 | if (ahd_cmd_get_transaction_status(cmd) | |
3164 | == CAM_REQUEUE_REQ) { | |
3165 | targ->dv_state_retry--; | |
3166 | } else if ((status & SSQ_FALLBACK) != 0) { | |
3167 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { | |
3168 | AHD_SET_DV_STATE(ahd, targ, | |
3169 | AHD_DV_STATE_EXIT); | |
3170 | break; | |
3171 | } | |
3172 | /* | |
3173 | * Do not count "falling back" | |
3174 | * against our retries. | |
3175 | */ | |
3176 | targ->dv_state_retry = 0; | |
3177 | } | |
3178 | if (targ->dv_state_retry <= 10) | |
3179 | break; | |
3180 | /* FALLTHROUGH */ | |
3181 | #ifdef AHD_DEBUG | |
3182 | if (ahd_debug & AHD_SHOW_DV) { | |
3183 | ahd_print_devinfo(ahd, devinfo); | |
3184 | printf("DV WEB reties exhausted\n"); | |
3185 | } | |
3186 | #endif | |
3187 | default: | |
3188 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3189 | break; | |
3190 | } | |
3191 | break; | |
3192 | ||
3193 | case AHD_DV_STATE_REB: | |
3194 | switch (status & SS_MASK) { | |
3195 | case SS_NOP: | |
3196 | if (memcmp(targ->dv_buffer, targ->dv_buffer1, | |
3197 | targ->dv_echo_size) != 0) { | |
3198 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) | |
3199 | AHD_SET_DV_STATE(ahd, targ, | |
3200 | AHD_DV_STATE_EXIT); | |
3201 | else | |
3202 | AHD_SET_DV_STATE(ahd, targ, | |
3203 | AHD_DV_STATE_WEB); | |
3204 | break; | |
3205 | } | |
3206 | ||
3207 | if (targ->dv_buffer != NULL) { | |
3208 | free(targ->dv_buffer, M_DEVBUF); | |
3209 | targ->dv_buffer = NULL; | |
3210 | } | |
3211 | if (targ->dv_buffer1 != NULL) { | |
3212 | free(targ->dv_buffer1, M_DEVBUF); | |
3213 | targ->dv_buffer1 = NULL; | |
3214 | } | |
3215 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3216 | break; | |
3217 | case SS_INQ_REFRESH: | |
3218 | AHD_SET_DV_STATE(ahd, targ, | |
3219 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
3220 | break; | |
3221 | case SS_RETRY: | |
3222 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
3223 | if (ahd_cmd_get_transaction_status(cmd) | |
3224 | == CAM_REQUEUE_REQ) { | |
3225 | targ->dv_state_retry--; | |
3226 | } else if ((status & SSQ_FALLBACK) != 0) { | |
3227 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { | |
3228 | AHD_SET_DV_STATE(ahd, targ, | |
3229 | AHD_DV_STATE_EXIT); | |
3230 | break; | |
3231 | } | |
3232 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB); | |
3233 | } | |
3234 | if (targ->dv_state_retry <= 10) { | |
3235 | if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0) | |
3236 | msleep(ahd->our_id*1000/10); | |
3237 | break; | |
3238 | } | |
3239 | #ifdef AHD_DEBUG | |
3240 | if (ahd_debug & AHD_SHOW_DV) { | |
3241 | ahd_print_devinfo(ahd, devinfo); | |
3242 | printf("DV REB reties exhausted\n"); | |
3243 | } | |
3244 | #endif | |
3245 | /* FALLTHROUGH */ | |
3246 | default: | |
3247 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3248 | break; | |
3249 | } | |
3250 | break; | |
3251 | ||
3252 | case AHD_DV_STATE_SU: | |
3253 | switch (status & SS_MASK) { | |
3254 | case SS_NOP: | |
3255 | case SS_INQ_REFRESH: | |
3256 | AHD_SET_DV_STATE(ahd, targ, | |
3257 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
3258 | break; | |
3259 | default: | |
3260 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3261 | break; | |
3262 | } | |
3263 | break; | |
3264 | ||
3265 | case AHD_DV_STATE_BUSY: | |
3266 | switch (status & SS_MASK) { | |
3267 | case SS_NOP: | |
3268 | case SS_INQ_REFRESH: | |
3269 | AHD_SET_DV_STATE(ahd, targ, | |
3270 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
3271 | break; | |
3272 | case SS_TUR: | |
3273 | case SS_RETRY: | |
3274 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
3275 | if (ahd_cmd_get_transaction_status(cmd) | |
3276 | == CAM_REQUEUE_REQ) { | |
3277 | targ->dv_state_retry--; | |
3278 | } else if (targ->dv_state_retry < 60) { | |
3279 | if ((status & SSQ_DELAY) != 0) | |
3280 | ssleep(1); | |
3281 | } else { | |
3282 | #ifdef AHD_DEBUG | |
3283 | if (ahd_debug & AHD_SHOW_DV) { | |
3284 | ahd_print_devinfo(ahd, devinfo); | |
3285 | printf("DV BUSY reties exhausted\n"); | |
3286 | } | |
3287 | #endif | |
3288 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3289 | } | |
3290 | break; | |
3291 | default: | |
3292 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3293 | break; | |
3294 | } | |
3295 | break; | |
3296 | ||
3297 | default: | |
3298 | printf("%s: Invalid DV completion state %d\n", ahd_name(ahd), | |
3299 | targ->dv_state); | |
3300 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
3301 | break; | |
3302 | } | |
3303 | } | |
3304 | ||
3305 | static void | |
3306 | ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
3307 | struct ahd_devinfo *devinfo) | |
3308 | { | |
3309 | memset(cmd, 0, sizeof(struct scsi_cmnd)); | |
3310 | cmd->device = ahd->platform_data->dv_scsi_dev; | |
3311 | cmd->scsi_done = ahd_linux_dv_complete; | |
3312 | } | |
3313 | ||
3314 | /* | |
3315 | * Synthesize an inquiry command. On the return trip, it'll be | |
3316 | * sniffed and the device transfer settings set for us. | |
3317 | */ | |
3318 | static void | |
3319 | ahd_linux_dv_inq(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
3320 | struct ahd_devinfo *devinfo, struct ahd_linux_target *targ, | |
3321 | u_int request_length) | |
3322 | { | |
3323 | ||
3324 | #ifdef AHD_DEBUG | |
3325 | if (ahd_debug & AHD_SHOW_DV) { | |
3326 | ahd_print_devinfo(ahd, devinfo); | |
3327 | printf("Sending INQ\n"); | |
3328 | } | |
3329 | #endif | |
3330 | if (targ->inq_data == NULL) | |
3331 | targ->inq_data = malloc(AHD_LINUX_DV_INQ_LEN, | |
3332 | M_DEVBUF, M_WAITOK); | |
3333 | if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) { | |
3334 | if (targ->dv_buffer != NULL) | |
3335 | free(targ->dv_buffer, M_DEVBUF); | |
3336 | targ->dv_buffer = malloc(AHD_LINUX_DV_INQ_LEN, | |
3337 | M_DEVBUF, M_WAITOK); | |
3338 | } | |
3339 | ||
3340 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 3341 | cmd->sc_data_direction = DMA_FROM_DEVICE; |
1da177e4 LT |
3342 | cmd->cmd_len = 6; |
3343 | cmd->cmnd[0] = INQUIRY; | |
3344 | cmd->cmnd[4] = request_length; | |
3345 | cmd->request_bufflen = request_length; | |
3346 | if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) | |
3347 | cmd->request_buffer = targ->dv_buffer; | |
3348 | else | |
3349 | cmd->request_buffer = targ->inq_data; | |
3350 | memset(cmd->request_buffer, 0, AHD_LINUX_DV_INQ_LEN); | |
3351 | } | |
3352 | ||
3353 | static void | |
3354 | ahd_linux_dv_tur(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
3355 | struct ahd_devinfo *devinfo) | |
3356 | { | |
3357 | ||
3358 | #ifdef AHD_DEBUG | |
3359 | if (ahd_debug & AHD_SHOW_DV) { | |
3360 | ahd_print_devinfo(ahd, devinfo); | |
3361 | printf("Sending TUR\n"); | |
3362 | } | |
3363 | #endif | |
3364 | /* Do a TUR to clear out any non-fatal transitional state */ | |
3365 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 3366 | cmd->sc_data_direction = DMA_NONE; |
1da177e4 LT |
3367 | cmd->cmd_len = 6; |
3368 | cmd->cmnd[0] = TEST_UNIT_READY; | |
3369 | } | |
3370 | ||
3371 | #define AHD_REBD_LEN 4 | |
3372 | ||
3373 | static void | |
3374 | ahd_linux_dv_rebd(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
3375 | struct ahd_devinfo *devinfo, struct ahd_linux_target *targ) | |
3376 | { | |
3377 | ||
3378 | #ifdef AHD_DEBUG | |
3379 | if (ahd_debug & AHD_SHOW_DV) { | |
3380 | ahd_print_devinfo(ahd, devinfo); | |
3381 | printf("Sending REBD\n"); | |
3382 | } | |
3383 | #endif | |
3384 | if (targ->dv_buffer != NULL) | |
3385 | free(targ->dv_buffer, M_DEVBUF); | |
3386 | targ->dv_buffer = malloc(AHD_REBD_LEN, M_DEVBUF, M_WAITOK); | |
3387 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 3388 | cmd->sc_data_direction = DMA_FROM_DEVICE; |
1da177e4 LT |
3389 | cmd->cmd_len = 10; |
3390 | cmd->cmnd[0] = READ_BUFFER; | |
3391 | cmd->cmnd[1] = 0x0b; | |
3392 | scsi_ulto3b(AHD_REBD_LEN, &cmd->cmnd[6]); | |
3393 | cmd->request_bufflen = AHD_REBD_LEN; | |
3394 | cmd->underflow = cmd->request_bufflen; | |
3395 | cmd->request_buffer = targ->dv_buffer; | |
3396 | } | |
3397 | ||
3398 | static void | |
3399 | ahd_linux_dv_web(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
3400 | struct ahd_devinfo *devinfo, struct ahd_linux_target *targ) | |
3401 | { | |
3402 | ||
3403 | #ifdef AHD_DEBUG | |
3404 | if (ahd_debug & AHD_SHOW_DV) { | |
3405 | ahd_print_devinfo(ahd, devinfo); | |
3406 | printf("Sending WEB\n"); | |
3407 | } | |
3408 | #endif | |
3409 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 3410 | cmd->sc_data_direction = DMA_TO_DEVICE; |
1da177e4 LT |
3411 | cmd->cmd_len = 10; |
3412 | cmd->cmnd[0] = WRITE_BUFFER; | |
3413 | cmd->cmnd[1] = 0x0a; | |
3414 | scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]); | |
3415 | cmd->request_bufflen = targ->dv_echo_size; | |
3416 | cmd->underflow = cmd->request_bufflen; | |
3417 | cmd->request_buffer = targ->dv_buffer; | |
3418 | } | |
3419 | ||
3420 | static void | |
3421 | ahd_linux_dv_reb(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
3422 | struct ahd_devinfo *devinfo, struct ahd_linux_target *targ) | |
3423 | { | |
3424 | ||
3425 | #ifdef AHD_DEBUG | |
3426 | if (ahd_debug & AHD_SHOW_DV) { | |
3427 | ahd_print_devinfo(ahd, devinfo); | |
3428 | printf("Sending REB\n"); | |
3429 | } | |
3430 | #endif | |
3431 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 3432 | cmd->sc_data_direction = DMA_FROM_DEVICE; |
1da177e4 LT |
3433 | cmd->cmd_len = 10; |
3434 | cmd->cmnd[0] = READ_BUFFER; | |
3435 | cmd->cmnd[1] = 0x0a; | |
3436 | scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]); | |
3437 | cmd->request_bufflen = targ->dv_echo_size; | |
3438 | cmd->underflow = cmd->request_bufflen; | |
3439 | cmd->request_buffer = targ->dv_buffer1; | |
3440 | } | |
3441 | ||
3442 | static void | |
3443 | ahd_linux_dv_su(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
3444 | struct ahd_devinfo *devinfo, | |
3445 | struct ahd_linux_target *targ) | |
3446 | { | |
3447 | u_int le; | |
3448 | ||
3449 | le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0; | |
3450 | ||
3451 | #ifdef AHD_DEBUG | |
3452 | if (ahd_debug & AHD_SHOW_DV) { | |
3453 | ahd_print_devinfo(ahd, devinfo); | |
3454 | printf("Sending SU\n"); | |
3455 | } | |
3456 | #endif | |
3457 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 3458 | cmd->sc_data_direction = DMA_NONE; |
1da177e4 LT |
3459 | cmd->cmd_len = 6; |
3460 | cmd->cmnd[0] = START_STOP_UNIT; | |
3461 | cmd->cmnd[4] = le | SSS_START; | |
3462 | } | |
3463 | ||
3464 | static int | |
3465 | ahd_linux_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) | |
3466 | { | |
3467 | struct ahd_linux_target *targ; | |
3468 | struct ahd_initiator_tinfo *tinfo; | |
3469 | struct ahd_transinfo *goal; | |
3470 | struct ahd_tmode_tstate *tstate; | |
3471 | u_int width; | |
3472 | u_int period; | |
3473 | u_int offset; | |
3474 | u_int ppr_options; | |
3475 | u_int cur_speed; | |
3476 | u_int wide_speed; | |
3477 | u_int narrow_speed; | |
3478 | u_int fallback_speed; | |
3479 | ||
3480 | #ifdef AHD_DEBUG | |
3481 | if (ahd_debug & AHD_SHOW_DV) { | |
3482 | ahd_print_devinfo(ahd, devinfo); | |
3483 | printf("Trying to fallback\n"); | |
3484 | } | |
3485 | #endif | |
3486 | targ = ahd->platform_data->targets[devinfo->target_offset]; | |
3487 | tinfo = ahd_fetch_transinfo(ahd, devinfo->channel, | |
3488 | devinfo->our_scsiid, | |
3489 | devinfo->target, &tstate); | |
3490 | goal = &tinfo->goal; | |
3491 | width = goal->width; | |
3492 | period = goal->period; | |
3493 | offset = goal->offset; | |
3494 | ppr_options = goal->ppr_options; | |
3495 | if (offset == 0) | |
3496 | period = AHD_ASYNC_XFER_PERIOD; | |
3497 | if (targ->dv_next_narrow_period == 0) | |
3498 | targ->dv_next_narrow_period = MAX(period, AHD_SYNCRATE_ULTRA2); | |
3499 | if (targ->dv_next_wide_period == 0) | |
3500 | targ->dv_next_wide_period = period; | |
3501 | if (targ->dv_max_width == 0) | |
3502 | targ->dv_max_width = width; | |
3503 | if (targ->dv_max_ppr_options == 0) | |
3504 | targ->dv_max_ppr_options = ppr_options; | |
3505 | if (targ->dv_last_ppr_options == 0) | |
3506 | targ->dv_last_ppr_options = ppr_options; | |
3507 | ||
3508 | cur_speed = aic_calc_speed(width, period, offset, AHD_SYNCRATE_MIN); | |
3509 | wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT, | |
3510 | targ->dv_next_wide_period, | |
3511 | MAX_OFFSET, AHD_SYNCRATE_MIN); | |
3512 | narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT, | |
3513 | targ->dv_next_narrow_period, | |
3514 | MAX_OFFSET, AHD_SYNCRATE_MIN); | |
3515 | fallback_speed = aic_calc_speed(width, period+1, offset, | |
3516 | AHD_SYNCRATE_MIN); | |
3517 | #ifdef AHD_DEBUG | |
3518 | if (ahd_debug & AHD_SHOW_DV) { | |
3519 | printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, " | |
3520 | "fallback_speed= %d\n", cur_speed, wide_speed, | |
3521 | narrow_speed, fallback_speed); | |
3522 | } | |
3523 | #endif | |
3524 | ||
3525 | if (cur_speed > 160000) { | |
3526 | /* | |
3527 | * Paced/DT/IU_REQ only transfer speeds. All we | |
3528 | * can do is fallback in terms of syncrate. | |
3529 | */ | |
3530 | period++; | |
3531 | } else if (cur_speed > 80000) { | |
3532 | if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { | |
3533 | /* | |
3534 | * Try without IU_REQ as it may be confusing | |
3535 | * an expander. | |
3536 | */ | |
3537 | ppr_options &= ~MSG_EXT_PPR_IU_REQ; | |
3538 | } else { | |
3539 | /* | |
3540 | * Paced/DT only transfer speeds. All we | |
3541 | * can do is fallback in terms of syncrate. | |
3542 | */ | |
3543 | period++; | |
3544 | ppr_options = targ->dv_max_ppr_options; | |
3545 | } | |
3546 | } else if (cur_speed > 3300) { | |
3547 | ||
3548 | /* | |
3549 | * In this range we the following | |
3550 | * options ordered from highest to | |
3551 | * lowest desireability: | |
3552 | * | |
3553 | * o Wide/DT | |
3554 | * o Wide/non-DT | |
3555 | * o Narrow at a potentally higher sync rate. | |
3556 | * | |
3557 | * All modes are tested with and without IU_REQ | |
3558 | * set since using IUs may confuse an expander. | |
3559 | */ | |
3560 | if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { | |
3561 | ||
3562 | ppr_options &= ~MSG_EXT_PPR_IU_REQ; | |
3563 | } else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) { | |
3564 | /* | |
3565 | * Try going non-DT. | |
3566 | */ | |
3567 | ppr_options = targ->dv_max_ppr_options; | |
3568 | ppr_options &= ~MSG_EXT_PPR_DT_REQ; | |
3569 | } else if (targ->dv_last_ppr_options != 0) { | |
3570 | /* | |
3571 | * Try without QAS or any other PPR options. | |
3572 | * We may need a non-PPR message to work with | |
3573 | * an expander. We look at the "last PPR options" | |
3574 | * so we will perform this fallback even if the | |
3575 | * target responded to our PPR negotiation with | |
3576 | * no option bits set. | |
3577 | */ | |
3578 | ppr_options = 0; | |
3579 | } else if (width == MSG_EXT_WDTR_BUS_16_BIT) { | |
3580 | /* | |
3581 | * If the next narrow speed is greater than | |
3582 | * the next wide speed, fallback to narrow. | |
3583 | * Otherwise fallback to the next DT/Wide setting. | |
3584 | * The narrow async speed will always be smaller | |
3585 | * than the wide async speed, so handle this case | |
3586 | * specifically. | |
3587 | */ | |
3588 | ppr_options = targ->dv_max_ppr_options; | |
3589 | if (narrow_speed > fallback_speed | |
3590 | || period >= AHD_ASYNC_XFER_PERIOD) { | |
3591 | targ->dv_next_wide_period = period+1; | |
3592 | width = MSG_EXT_WDTR_BUS_8_BIT; | |
3593 | period = targ->dv_next_narrow_period; | |
3594 | } else { | |
3595 | period++; | |
3596 | } | |
3597 | } else if ((ahd->features & AHD_WIDE) != 0 | |
3598 | && targ->dv_max_width != 0 | |
3599 | && wide_speed >= fallback_speed | |
3600 | && (targ->dv_next_wide_period <= AHD_ASYNC_XFER_PERIOD | |
3601 | || period >= AHD_ASYNC_XFER_PERIOD)) { | |
3602 | ||
3603 | /* | |
3604 | * We are narrow. Try falling back | |
3605 | * to the next wide speed with | |
3606 | * all supported ppr options set. | |
3607 | */ | |
3608 | targ->dv_next_narrow_period = period+1; | |
3609 | width = MSG_EXT_WDTR_BUS_16_BIT; | |
3610 | period = targ->dv_next_wide_period; | |
3611 | ppr_options = targ->dv_max_ppr_options; | |
3612 | } else { | |
3613 | /* Only narrow fallback is allowed. */ | |
3614 | period++; | |
3615 | ppr_options = targ->dv_max_ppr_options; | |
3616 | } | |
3617 | } else { | |
3618 | return (-1); | |
3619 | } | |
3620 | offset = MAX_OFFSET; | |
3621 | ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_PACED); | |
3622 | ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, FALSE); | |
3623 | if (period == 0) { | |
3624 | period = 0; | |
3625 | offset = 0; | |
3626 | ppr_options = 0; | |
3627 | if (width == MSG_EXT_WDTR_BUS_8_BIT) | |
3628 | targ->dv_next_narrow_period = AHD_ASYNC_XFER_PERIOD; | |
3629 | else | |
3630 | targ->dv_next_wide_period = AHD_ASYNC_XFER_PERIOD; | |
3631 | } | |
3632 | ahd_set_syncrate(ahd, devinfo, period, offset, | |
3633 | ppr_options, AHD_TRANS_GOAL, FALSE); | |
3634 | targ->dv_last_ppr_options = ppr_options; | |
3635 | return (0); | |
3636 | } | |
3637 | ||
3638 | static void | |
3639 | ahd_linux_dv_timeout(struct scsi_cmnd *cmd) | |
3640 | { | |
3641 | struct ahd_softc *ahd; | |
3642 | struct scb *scb; | |
3643 | u_long flags; | |
3644 | ||
3645 | ahd = *((struct ahd_softc **)cmd->device->host->hostdata); | |
3646 | ahd_lock(ahd, &flags); | |
3647 | ||
3648 | #ifdef AHD_DEBUG | |
3649 | if (ahd_debug & AHD_SHOW_DV) { | |
3650 | printf("%s: Timeout while doing DV command %x.\n", | |
3651 | ahd_name(ahd), cmd->cmnd[0]); | |
3652 | ahd_dump_card_state(ahd); | |
3653 | } | |
3654 | #endif | |
3655 | ||
3656 | /* | |
3657 | * Guard against "done race". No action is | |
3658 | * required if we just completed. | |
3659 | */ | |
3660 | if ((scb = (struct scb *)cmd->host_scribble) == NULL) { | |
3661 | ahd_unlock(ahd, &flags); | |
3662 | return; | |
3663 | } | |
3664 | ||
3665 | /* | |
3666 | * Command has not completed. Mark this | |
3667 | * SCB as having failing status prior to | |
3668 | * resetting the bus, so we get the correct | |
3669 | * error code. | |
3670 | */ | |
3671 | if ((scb->flags & SCB_SENSE) != 0) | |
3672 | ahd_set_transaction_status(scb, CAM_AUTOSENSE_FAIL); | |
3673 | else | |
3674 | ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); | |
3675 | ahd_reset_channel(ahd, cmd->device->channel + 'A', /*initiate*/TRUE); | |
3676 | ||
3677 | /* | |
3678 | * Add a minimal bus settle delay for devices that are slow to | |
3679 | * respond after bus resets. | |
3680 | */ | |
3681 | ahd_freeze_simq(ahd); | |
3682 | init_timer(&ahd->platform_data->reset_timer); | |
3683 | ahd->platform_data->reset_timer.data = (u_long)ahd; | |
3684 | ahd->platform_data->reset_timer.expires = jiffies + HZ / 2; | |
3685 | ahd->platform_data->reset_timer.function = | |
3686 | (ahd_linux_callback_t *)ahd_release_simq; | |
3687 | add_timer(&ahd->platform_data->reset_timer); | |
3688 | if (ahd_linux_next_device_to_run(ahd) != NULL) | |
3689 | ahd_schedule_runq(ahd); | |
3690 | ahd_linux_run_complete_queue(ahd); | |
3691 | ahd_unlock(ahd, &flags); | |
3692 | } | |
3693 | ||
3694 | static void | |
3695 | ahd_linux_dv_complete(struct scsi_cmnd *cmd) | |
3696 | { | |
3697 | struct ahd_softc *ahd; | |
3698 | ||
3699 | ahd = *((struct ahd_softc **)cmd->device->host->hostdata); | |
3700 | ||
3701 | /* Delete the DV timer before it goes off! */ | |
3702 | scsi_delete_timer(cmd); | |
3703 | ||
3704 | #ifdef AHD_DEBUG | |
3705 | if (ahd_debug & AHD_SHOW_DV) | |
3706 | printf("%s:%c:%d: Command completed, status= 0x%x\n", | |
3707 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
3708 | cmd->result); | |
3709 | #endif | |
3710 | ||
3711 | /* Wake up the state machine */ | |
3712 | up(&ahd->platform_data->dv_cmd_sem); | |
3713 | } | |
3714 | ||
3715 | static void | |
3716 | ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ) | |
3717 | { | |
3718 | uint16_t b; | |
3719 | u_int i; | |
3720 | u_int j; | |
3721 | ||
3722 | if (targ->dv_buffer != NULL) | |
3723 | free(targ->dv_buffer, M_DEVBUF); | |
3724 | targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK); | |
3725 | if (targ->dv_buffer1 != NULL) | |
3726 | free(targ->dv_buffer1, M_DEVBUF); | |
3727 | targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK); | |
3728 | ||
3729 | i = 0; | |
3730 | ||
3731 | b = 0x0001; | |
3732 | for (j = 0 ; i < targ->dv_echo_size; j++) { | |
3733 | if (j < 32) { | |
3734 | /* | |
3735 | * 32bytes of sequential numbers. | |
3736 | */ | |
3737 | targ->dv_buffer[i++] = j & 0xff; | |
3738 | } else if (j < 48) { | |
3739 | /* | |
3740 | * 32bytes of repeating 0x0000, 0xffff. | |
3741 | */ | |
3742 | targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00; | |
3743 | } else if (j < 64) { | |
3744 | /* | |
3745 | * 32bytes of repeating 0x5555, 0xaaaa. | |
3746 | */ | |
3747 | targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55; | |
3748 | } else { | |
3749 | /* | |
3750 | * Remaining buffer is filled with a repeating | |
3751 | * patter of: | |
3752 | * | |
3753 | * 0xffff | |
3754 | * ~0x0001 << shifted once in each loop. | |
3755 | */ | |
3756 | if (j & 0x02) { | |
3757 | if (j & 0x01) { | |
3758 | targ->dv_buffer[i++] = ~(b >> 8) & 0xff; | |
3759 | b <<= 1; | |
3760 | if (b == 0x0000) | |
3761 | b = 0x0001; | |
3762 | } else { | |
3763 | targ->dv_buffer[i++] = (~b & 0xff); | |
3764 | } | |
3765 | } else { | |
3766 | targ->dv_buffer[i++] = 0xff; | |
3767 | } | |
3768 | } | |
3769 | } | |
3770 | } | |
3771 | ||
3772 | static u_int | |
3773 | ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) | |
3774 | { | |
3775 | static int warned_user; | |
3776 | u_int tags; | |
3777 | ||
3778 | tags = 0; | |
3779 | if ((ahd->user_discenable & devinfo->target_mask) != 0) { | |
3780 | if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) { | |
3781 | ||
3782 | if (warned_user == 0) { | |
3783 | printf(KERN_WARNING | |
3784 | "aic79xx: WARNING: Insufficient tag_info instances\n" | |
3785 | "aic79xx: for installed controllers. Using defaults\n" | |
3786 | "aic79xx: Please update the aic79xx_tag_info array in\n" | |
3787 | "aic79xx: the aic79xx_osm.c source file.\n"); | |
3788 | warned_user++; | |
3789 | } | |
3790 | tags = AHD_MAX_QUEUE; | |
3791 | } else { | |
3792 | adapter_tag_info_t *tag_info; | |
3793 | ||
3794 | tag_info = &aic79xx_tag_info[ahd->unit]; | |
3795 | tags = tag_info->tag_commands[devinfo->target_offset]; | |
3796 | if (tags > AHD_MAX_QUEUE) | |
3797 | tags = AHD_MAX_QUEUE; | |
3798 | } | |
3799 | } | |
3800 | return (tags); | |
3801 | } | |
3802 | ||
3803 | static u_int | |
3804 | ahd_linux_user_dv_setting(struct ahd_softc *ahd) | |
3805 | { | |
3806 | static int warned_user; | |
3807 | int dv; | |
3808 | ||
3809 | if (ahd->unit >= NUM_ELEMENTS(aic79xx_dv_settings)) { | |
3810 | ||
3811 | if (warned_user == 0) { | |
3812 | printf(KERN_WARNING | |
3813 | "aic79xx: WARNING: Insufficient dv settings instances\n" | |
3814 | "aic79xx: for installed controllers. Using defaults\n" | |
3815 | "aic79xx: Please update the aic79xx_dv_settings array in" | |
3816 | "aic79xx: the aic79xx_osm.c source file.\n"); | |
3817 | warned_user++; | |
3818 | } | |
3819 | dv = -1; | |
3820 | } else { | |
3821 | ||
3822 | dv = aic79xx_dv_settings[ahd->unit]; | |
3823 | } | |
3824 | ||
3825 | if (dv < 0) { | |
3826 | /* | |
3827 | * Apply the default. | |
3828 | */ | |
3829 | dv = 1; | |
3830 | if (ahd->seep_config != 0) | |
3831 | dv = (ahd->seep_config->bios_control & CFENABLEDV); | |
3832 | } | |
3833 | return (dv); | |
3834 | } | |
3835 | ||
3836 | static void | |
3837 | ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd) | |
3838 | { | |
3839 | static int warned_user; | |
3840 | u_int rd_strm_mask; | |
3841 | u_int target_id; | |
3842 | ||
3843 | /* | |
3844 | * If we have specific read streaming info for this controller, | |
3845 | * apply it. Otherwise use the defaults. | |
3846 | */ | |
3847 | if (ahd->unit >= NUM_ELEMENTS(aic79xx_rd_strm_info)) { | |
3848 | ||
3849 | if (warned_user == 0) { | |
3850 | ||
3851 | printf(KERN_WARNING | |
3852 | "aic79xx: WARNING: Insufficient rd_strm instances\n" | |
3853 | "aic79xx: for installed controllers. Using defaults\n" | |
3854 | "aic79xx: Please update the aic79xx_rd_strm_info array\n" | |
3855 | "aic79xx: in the aic79xx_osm.c source file.\n"); | |
3856 | warned_user++; | |
3857 | } | |
3858 | rd_strm_mask = AIC79XX_CONFIGED_RD_STRM; | |
3859 | } else { | |
3860 | ||
3861 | rd_strm_mask = aic79xx_rd_strm_info[ahd->unit]; | |
3862 | } | |
3863 | for (target_id = 0; target_id < 16; target_id++) { | |
3864 | struct ahd_devinfo devinfo; | |
3865 | struct ahd_initiator_tinfo *tinfo; | |
3866 | struct ahd_tmode_tstate *tstate; | |
3867 | ||
3868 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, | |
3869 | target_id, &tstate); | |
3870 | ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, | |
3871 | CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); | |
3872 | tinfo->user.ppr_options &= ~MSG_EXT_PPR_RD_STRM; | |
3873 | if ((rd_strm_mask & devinfo.target_mask) != 0) | |
3874 | tinfo->user.ppr_options |= MSG_EXT_PPR_RD_STRM; | |
3875 | } | |
3876 | } | |
3877 | ||
3878 | /* | |
3879 | * Determines the queue depth for a given device. | |
3880 | */ | |
3881 | static void | |
3882 | ahd_linux_device_queue_depth(struct ahd_softc *ahd, | |
3883 | struct ahd_linux_device *dev) | |
3884 | { | |
3885 | struct ahd_devinfo devinfo; | |
3886 | u_int tags; | |
3887 | ||
3888 | ahd_compile_devinfo(&devinfo, | |
3889 | ahd->our_id, | |
3890 | dev->target->target, dev->lun, | |
3891 | dev->target->channel == 0 ? 'A' : 'B', | |
3892 | ROLE_INITIATOR); | |
3893 | tags = ahd_linux_user_tagdepth(ahd, &devinfo); | |
3894 | if (tags != 0 | |
3895 | && dev->scsi_device != NULL | |
3896 | && dev->scsi_device->tagged_supported != 0) { | |
3897 | ||
3898 | ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED); | |
3899 | ahd_print_devinfo(ahd, &devinfo); | |
3900 | printf("Tagged Queuing enabled. Depth %d\n", tags); | |
3901 | } else { | |
3902 | ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE); | |
3903 | } | |
3904 | } | |
3905 | ||
3906 | static void | |
3907 | ahd_linux_run_device_queue(struct ahd_softc *ahd, struct ahd_linux_device *dev) | |
3908 | { | |
3909 | struct ahd_cmd *acmd; | |
3910 | struct scsi_cmnd *cmd; | |
3911 | struct scb *scb; | |
3912 | struct hardware_scb *hscb; | |
3913 | struct ahd_initiator_tinfo *tinfo; | |
3914 | struct ahd_tmode_tstate *tstate; | |
3915 | u_int col_idx; | |
3916 | uint16_t mask; | |
3917 | ||
3918 | if ((dev->flags & AHD_DEV_ON_RUN_LIST) != 0) | |
3919 | panic("running device on run list"); | |
3920 | ||
3921 | while ((acmd = TAILQ_FIRST(&dev->busyq)) != NULL | |
3922 | && dev->openings > 0 && dev->qfrozen == 0) { | |
3923 | ||
3924 | /* | |
3925 | * Schedule us to run later. The only reason we are not | |
3926 | * running is because the whole controller Q is frozen. | |
3927 | */ | |
3928 | if (ahd->platform_data->qfrozen != 0 | |
3929 | && AHD_DV_SIMQ_FROZEN(ahd) == 0) { | |
3930 | ||
3931 | TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, | |
3932 | dev, links); | |
3933 | dev->flags |= AHD_DEV_ON_RUN_LIST; | |
3934 | return; | |
3935 | } | |
3936 | ||
3937 | cmd = &acmd_scsi_cmd(acmd); | |
3938 | ||
3939 | /* | |
3940 | * Get an scb to use. | |
3941 | */ | |
3942 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, | |
3943 | cmd->device->id, &tstate); | |
3944 | if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 | |
3945 | || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { | |
3946 | col_idx = AHD_NEVER_COL_IDX; | |
3947 | } else { | |
3948 | col_idx = AHD_BUILD_COL_IDX(cmd->device->id, | |
3949 | cmd->device->lun); | |
3950 | } | |
3951 | if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { | |
3952 | TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, | |
3953 | dev, links); | |
3954 | dev->flags |= AHD_DEV_ON_RUN_LIST; | |
3955 | ahd->flags |= AHD_RESOURCE_SHORTAGE; | |
3956 | return; | |
3957 | } | |
3958 | TAILQ_REMOVE(&dev->busyq, acmd, acmd_links.tqe); | |
3959 | scb->io_ctx = cmd; | |
3960 | scb->platform_data->dev = dev; | |
3961 | hscb = scb->hscb; | |
3962 | cmd->host_scribble = (char *)scb; | |
3963 | ||
3964 | /* | |
3965 | * Fill out basics of the HSCB. | |
3966 | */ | |
3967 | hscb->control = 0; | |
3968 | hscb->scsiid = BUILD_SCSIID(ahd, cmd); | |
3969 | hscb->lun = cmd->device->lun; | |
3970 | scb->hscb->task_management = 0; | |
3971 | mask = SCB_GET_TARGET_MASK(ahd, scb); | |
3972 | ||
3973 | if ((ahd->user_discenable & mask) != 0) | |
3974 | hscb->control |= DISCENB; | |
3975 | ||
3976 | if (AHD_DV_CMD(cmd) != 0) | |
3977 | scb->flags |= SCB_SILENT; | |
3978 | ||
3979 | if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) | |
3980 | scb->flags |= SCB_PACKETIZED; | |
3981 | ||
3982 | if ((tstate->auto_negotiate & mask) != 0) { | |
3983 | scb->flags |= SCB_AUTO_NEGOTIATE; | |
3984 | scb->hscb->control |= MK_MESSAGE; | |
3985 | } | |
3986 | ||
3987 | if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { | |
3988 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
3989 | int msg_bytes; | |
3990 | uint8_t tag_msgs[2]; | |
3991 | ||
3992 | msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); | |
3993 | if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { | |
3994 | hscb->control |= tag_msgs[0]; | |
3995 | if (tag_msgs[0] == MSG_ORDERED_TASK) | |
3996 | dev->commands_since_idle_or_otag = 0; | |
3997 | } else | |
3998 | #endif | |
3999 | if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH | |
4000 | && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { | |
4001 | hscb->control |= MSG_ORDERED_TASK; | |
4002 | dev->commands_since_idle_or_otag = 0; | |
4003 | } else { | |
4004 | hscb->control |= MSG_SIMPLE_TASK; | |
4005 | } | |
4006 | } | |
4007 | ||
4008 | hscb->cdb_len = cmd->cmd_len; | |
4009 | memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); | |
4010 | ||
4011 | scb->sg_count = 0; | |
4012 | ahd_set_residual(scb, 0); | |
4013 | ahd_set_sense_residual(scb, 0); | |
4014 | if (cmd->use_sg != 0) { | |
4015 | void *sg; | |
4016 | struct scatterlist *cur_seg; | |
4017 | u_int nseg; | |
4018 | int dir; | |
4019 | ||
4020 | cur_seg = (struct scatterlist *)cmd->request_buffer; | |
be7db055 | 4021 | dir = cmd->sc_data_direction; |
1da177e4 LT |
4022 | nseg = pci_map_sg(ahd->dev_softc, cur_seg, |
4023 | cmd->use_sg, dir); | |
4024 | scb->platform_data->xfer_len = 0; | |
4025 | for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) { | |
4026 | dma_addr_t addr; | |
4027 | bus_size_t len; | |
4028 | ||
4029 | addr = sg_dma_address(cur_seg); | |
4030 | len = sg_dma_len(cur_seg); | |
4031 | scb->platform_data->xfer_len += len; | |
4032 | sg = ahd_sg_setup(ahd, scb, sg, addr, len, | |
4033 | /*last*/nseg == 1); | |
4034 | } | |
4035 | } else if (cmd->request_bufflen != 0) { | |
4036 | void *sg; | |
4037 | dma_addr_t addr; | |
4038 | int dir; | |
4039 | ||
4040 | sg = scb->sg_list; | |
be7db055 | 4041 | dir = cmd->sc_data_direction; |
1da177e4 LT |
4042 | addr = pci_map_single(ahd->dev_softc, |
4043 | cmd->request_buffer, | |
4044 | cmd->request_bufflen, dir); | |
4045 | scb->platform_data->xfer_len = cmd->request_bufflen; | |
4046 | scb->platform_data->buf_busaddr = addr; | |
4047 | sg = ahd_sg_setup(ahd, scb, sg, addr, | |
4048 | cmd->request_bufflen, /*last*/TRUE); | |
4049 | } | |
4050 | ||
4051 | LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); | |
4052 | dev->openings--; | |
4053 | dev->active++; | |
4054 | dev->commands_issued++; | |
4055 | ||
4056 | /* Update the error counting bucket and dump if needed */ | |
4057 | if (dev->target->cmds_since_error) { | |
4058 | dev->target->cmds_since_error++; | |
4059 | if (dev->target->cmds_since_error > | |
4060 | AHD_LINUX_ERR_THRESH) | |
4061 | dev->target->cmds_since_error = 0; | |
4062 | } | |
4063 | ||
4064 | if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) | |
4065 | dev->commands_since_idle_or_otag++; | |
4066 | scb->flags |= SCB_ACTIVE; | |
4067 | ahd_queue_scb(ahd, scb); | |
4068 | } | |
4069 | } | |
4070 | ||
4071 | /* | |
4072 | * SCSI controller interrupt handler. | |
4073 | */ | |
4074 | irqreturn_t | |
4075 | ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs) | |
4076 | { | |
4077 | struct ahd_softc *ahd; | |
4078 | u_long flags; | |
4079 | int ours; | |
4080 | ||
4081 | ahd = (struct ahd_softc *) dev_id; | |
4082 | ahd_lock(ahd, &flags); | |
4083 | ours = ahd_intr(ahd); | |
4084 | if (ahd_linux_next_device_to_run(ahd) != NULL) | |
4085 | ahd_schedule_runq(ahd); | |
4086 | ahd_linux_run_complete_queue(ahd); | |
4087 | ahd_unlock(ahd, &flags); | |
4088 | return IRQ_RETVAL(ours); | |
4089 | } | |
4090 | ||
4091 | void | |
4092 | ahd_platform_flushwork(struct ahd_softc *ahd) | |
4093 | { | |
4094 | ||
4095 | while (ahd_linux_run_complete_queue(ahd) != NULL) | |
4096 | ; | |
4097 | } | |
4098 | ||
4099 | static struct ahd_linux_target* | |
4100 | ahd_linux_alloc_target(struct ahd_softc *ahd, u_int channel, u_int target) | |
4101 | { | |
4102 | struct ahd_linux_target *targ; | |
4103 | ||
4104 | targ = malloc(sizeof(*targ), M_DEVBUF, M_NOWAIT); | |
4105 | if (targ == NULL) | |
4106 | return (NULL); | |
4107 | memset(targ, 0, sizeof(*targ)); | |
4108 | targ->channel = channel; | |
4109 | targ->target = target; | |
4110 | targ->ahd = ahd; | |
4111 | targ->flags = AHD_DV_REQUIRED; | |
4112 | ahd->platform_data->targets[target] = targ; | |
4113 | return (targ); | |
4114 | } | |
4115 | ||
4116 | static void | |
4117 | ahd_linux_free_target(struct ahd_softc *ahd, struct ahd_linux_target *targ) | |
4118 | { | |
4119 | struct ahd_devinfo devinfo; | |
4120 | struct ahd_initiator_tinfo *tinfo; | |
4121 | struct ahd_tmode_tstate *tstate; | |
4122 | u_int our_id; | |
4123 | u_int target_offset; | |
4124 | char channel; | |
4125 | ||
4126 | /* | |
4127 | * Force a negotiation to async/narrow on any | |
4128 | * future command to this device unless a bus | |
4129 | * reset occurs between now and that command. | |
4130 | */ | |
4131 | channel = 'A' + targ->channel; | |
4132 | our_id = ahd->our_id; | |
4133 | target_offset = targ->target; | |
4134 | tinfo = ahd_fetch_transinfo(ahd, channel, our_id, | |
4135 | targ->target, &tstate); | |
4136 | ahd_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD, | |
4137 | channel, ROLE_INITIATOR); | |
4138 | ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, | |
4139 | AHD_TRANS_GOAL, /*paused*/FALSE); | |
4140 | ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, | |
4141 | AHD_TRANS_GOAL, /*paused*/FALSE); | |
4142 | ahd_update_neg_request(ahd, &devinfo, tstate, tinfo, AHD_NEG_ALWAYS); | |
4143 | ahd->platform_data->targets[target_offset] = NULL; | |
4144 | if (targ->inq_data != NULL) | |
4145 | free(targ->inq_data, M_DEVBUF); | |
4146 | if (targ->dv_buffer != NULL) | |
4147 | free(targ->dv_buffer, M_DEVBUF); | |
4148 | if (targ->dv_buffer1 != NULL) | |
4149 | free(targ->dv_buffer1, M_DEVBUF); | |
4150 | free(targ, M_DEVBUF); | |
4151 | } | |
4152 | ||
4153 | static struct ahd_linux_device* | |
4154 | ahd_linux_alloc_device(struct ahd_softc *ahd, | |
4155 | struct ahd_linux_target *targ, u_int lun) | |
4156 | { | |
4157 | struct ahd_linux_device *dev; | |
4158 | ||
4159 | dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT); | |
4160 | if (dev == NULL) | |
4161 | return (NULL); | |
4162 | memset(dev, 0, sizeof(*dev)); | |
4163 | init_timer(&dev->timer); | |
4164 | TAILQ_INIT(&dev->busyq); | |
4165 | dev->flags = AHD_DEV_UNCONFIGURED; | |
4166 | dev->lun = lun; | |
4167 | dev->target = targ; | |
4168 | ||
4169 | /* | |
4170 | * We start out life using untagged | |
4171 | * transactions of which we allow one. | |
4172 | */ | |
4173 | dev->openings = 1; | |
4174 | ||
4175 | /* | |
4176 | * Set maxtags to 0. This will be changed if we | |
4177 | * later determine that we are dealing with | |
4178 | * a tagged queuing capable device. | |
4179 | */ | |
4180 | dev->maxtags = 0; | |
4181 | ||
4182 | targ->refcount++; | |
4183 | targ->devices[lun] = dev; | |
4184 | return (dev); | |
4185 | } | |
4186 | ||
4187 | static void | |
4188 | ahd_linux_free_device(struct ahd_softc *ahd, struct ahd_linux_device *dev) | |
4189 | { | |
4190 | struct ahd_linux_target *targ; | |
4191 | ||
4192 | del_timer(&dev->timer); | |
4193 | targ = dev->target; | |
4194 | targ->devices[dev->lun] = NULL; | |
4195 | free(dev, M_DEVBUF); | |
4196 | targ->refcount--; | |
4197 | if (targ->refcount == 0 | |
4198 | && (targ->flags & AHD_DV_REQUIRED) == 0) | |
4199 | ahd_linux_free_target(ahd, targ); | |
4200 | } | |
4201 | ||
4202 | void | |
4203 | ahd_send_async(struct ahd_softc *ahd, char channel, | |
4204 | u_int target, u_int lun, ac_code code, void *arg) | |
4205 | { | |
4206 | switch (code) { | |
4207 | case AC_TRANSFER_NEG: | |
4208 | { | |
4209 | char buf[80]; | |
4210 | struct ahd_linux_target *targ; | |
4211 | struct info_str info; | |
4212 | struct ahd_initiator_tinfo *tinfo; | |
4213 | struct ahd_tmode_tstate *tstate; | |
4214 | ||
4215 | info.buffer = buf; | |
4216 | info.length = sizeof(buf); | |
4217 | info.offset = 0; | |
4218 | info.pos = 0; | |
4219 | tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, | |
4220 | target, &tstate); | |
4221 | ||
4222 | /* | |
4223 | * Don't bother reporting results while | |
4224 | * negotiations are still pending. | |
4225 | */ | |
4226 | if (tinfo->curr.period != tinfo->goal.period | |
4227 | || tinfo->curr.width != tinfo->goal.width | |
4228 | || tinfo->curr.offset != tinfo->goal.offset | |
4229 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options) | |
4230 | if (bootverbose == 0) | |
4231 | break; | |
4232 | ||
4233 | /* | |
4234 | * Don't bother reporting results that | |
4235 | * are identical to those last reported. | |
4236 | */ | |
4237 | targ = ahd->platform_data->targets[target]; | |
4238 | if (targ == NULL) | |
4239 | break; | |
4240 | if (tinfo->curr.period == targ->last_tinfo.period | |
4241 | && tinfo->curr.width == targ->last_tinfo.width | |
4242 | && tinfo->curr.offset == targ->last_tinfo.offset | |
4243 | && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options) | |
4244 | if (bootverbose == 0) | |
4245 | break; | |
4246 | ||
4247 | targ->last_tinfo.period = tinfo->curr.period; | |
4248 | targ->last_tinfo.width = tinfo->curr.width; | |
4249 | targ->last_tinfo.offset = tinfo->curr.offset; | |
4250 | targ->last_tinfo.ppr_options = tinfo->curr.ppr_options; | |
4251 | ||
4252 | printf("(%s:%c:", ahd_name(ahd), channel); | |
4253 | if (target == CAM_TARGET_WILDCARD) | |
4254 | printf("*): "); | |
4255 | else | |
4256 | printf("%d): ", target); | |
4257 | ahd_format_transinfo(&info, &tinfo->curr); | |
4258 | if (info.pos < info.length) | |
4259 | *info.buffer = '\0'; | |
4260 | else | |
4261 | buf[info.length - 1] = '\0'; | |
4262 | printf("%s", buf); | |
4263 | break; | |
4264 | } | |
4265 | case AC_SENT_BDR: | |
4266 | { | |
4267 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
4268 | WARN_ON(lun != CAM_LUN_WILDCARD); | |
4269 | scsi_report_device_reset(ahd->platform_data->host, | |
4270 | channel - 'A', target); | |
4271 | #else | |
4272 | Scsi_Device *scsi_dev; | |
4273 | ||
4274 | /* | |
4275 | * Find the SCSI device associated with this | |
4276 | * request and indicate that a UA is expected. | |
4277 | */ | |
4278 | for (scsi_dev = ahd->platform_data->host->host_queue; | |
4279 | scsi_dev != NULL; scsi_dev = scsi_dev->next) { | |
4280 | if (channel - 'A' == scsi_dev->channel | |
4281 | && target == scsi_dev->id | |
4282 | && (lun == CAM_LUN_WILDCARD | |
4283 | || lun == scsi_dev->lun)) { | |
4284 | scsi_dev->was_reset = 1; | |
4285 | scsi_dev->expecting_cc_ua = 1; | |
4286 | } | |
4287 | } | |
4288 | #endif | |
4289 | break; | |
4290 | } | |
4291 | case AC_BUS_RESET: | |
4292 | if (ahd->platform_data->host != NULL) { | |
4293 | scsi_report_bus_reset(ahd->platform_data->host, | |
4294 | channel - 'A'); | |
4295 | } | |
4296 | break; | |
4297 | default: | |
4298 | panic("ahd_send_async: Unexpected async event"); | |
4299 | } | |
4300 | } | |
4301 | ||
4302 | /* | |
4303 | * Calls the higher level scsi done function and frees the scb. | |
4304 | */ | |
4305 | void | |
4306 | ahd_done(struct ahd_softc *ahd, struct scb *scb) | |
4307 | { | |
4308 | Scsi_Cmnd *cmd; | |
4309 | struct ahd_linux_device *dev; | |
4310 | ||
4311 | if ((scb->flags & SCB_ACTIVE) == 0) { | |
4312 | printf("SCB %d done'd twice\n", SCB_GET_TAG(scb)); | |
4313 | ahd_dump_card_state(ahd); | |
4314 | panic("Stopping for safety"); | |
4315 | } | |
4316 | LIST_REMOVE(scb, pending_links); | |
4317 | cmd = scb->io_ctx; | |
4318 | dev = scb->platform_data->dev; | |
4319 | dev->active--; | |
4320 | dev->openings++; | |
4321 | if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { | |
4322 | cmd->result &= ~(CAM_DEV_QFRZN << 16); | |
4323 | dev->qfrozen--; | |
4324 | } | |
4325 | ahd_linux_unmap_scb(ahd, scb); | |
4326 | ||
4327 | /* | |
4328 | * Guard against stale sense data. | |
4329 | * The Linux mid-layer assumes that sense | |
4330 | * was retrieved anytime the first byte of | |
4331 | * the sense buffer looks "sane". | |
4332 | */ | |
4333 | cmd->sense_buffer[0] = 0; | |
4334 | if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { | |
4335 | uint32_t amount_xferred; | |
4336 | ||
4337 | amount_xferred = | |
4338 | ahd_get_transfer_length(scb) - ahd_get_residual(scb); | |
4339 | if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { | |
4340 | #ifdef AHD_DEBUG | |
4341 | if ((ahd_debug & AHD_SHOW_MISC) != 0) { | |
4342 | ahd_print_path(ahd, scb); | |
4343 | printf("Set CAM_UNCOR_PARITY\n"); | |
4344 | } | |
4345 | #endif | |
4346 | ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); | |
4347 | #ifdef AHD_REPORT_UNDERFLOWS | |
4348 | /* | |
4349 | * This code is disabled by default as some | |
4350 | * clients of the SCSI system do not properly | |
4351 | * initialize the underflow parameter. This | |
4352 | * results in spurious termination of commands | |
4353 | * that complete as expected (e.g. underflow is | |
4354 | * allowed as command can return variable amounts | |
4355 | * of data. | |
4356 | */ | |
4357 | } else if (amount_xferred < scb->io_ctx->underflow) { | |
4358 | u_int i; | |
4359 | ||
4360 | ahd_print_path(ahd, scb); | |
4361 | printf("CDB:"); | |
4362 | for (i = 0; i < scb->io_ctx->cmd_len; i++) | |
4363 | printf(" 0x%x", scb->io_ctx->cmnd[i]); | |
4364 | printf("\n"); | |
4365 | ahd_print_path(ahd, scb); | |
4366 | printf("Saw underflow (%ld of %ld bytes). " | |
4367 | "Treated as error\n", | |
4368 | ahd_get_residual(scb), | |
4369 | ahd_get_transfer_length(scb)); | |
4370 | ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); | |
4371 | #endif | |
4372 | } else { | |
4373 | ahd_set_transaction_status(scb, CAM_REQ_CMP); | |
4374 | } | |
4375 | } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { | |
4376 | ahd_linux_handle_scsi_status(ahd, dev, scb); | |
4377 | } else if (ahd_get_transaction_status(scb) == CAM_SEL_TIMEOUT) { | |
4378 | dev->flags |= AHD_DEV_UNCONFIGURED; | |
4379 | if (AHD_DV_CMD(cmd) == FALSE) | |
4380 | dev->target->flags &= ~AHD_DV_REQUIRED; | |
4381 | } | |
4382 | /* | |
4383 | * Start DV for devices that require it assuming the first command | |
4384 | * sent does not result in a selection timeout. | |
4385 | */ | |
4386 | if (ahd_get_transaction_status(scb) != CAM_SEL_TIMEOUT | |
4387 | && (dev->target->flags & AHD_DV_REQUIRED) != 0) | |
4388 | ahd_linux_start_dv(ahd); | |
4389 | ||
4390 | if (dev->openings == 1 | |
4391 | && ahd_get_transaction_status(scb) == CAM_REQ_CMP | |
4392 | && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) | |
4393 | dev->tag_success_count++; | |
4394 | /* | |
4395 | * Some devices deal with temporary internal resource | |
4396 | * shortages by returning queue full. When the queue | |
4397 | * full occurrs, we throttle back. Slowly try to get | |
4398 | * back to our previous queue depth. | |
4399 | */ | |
4400 | if ((dev->openings + dev->active) < dev->maxtags | |
4401 | && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { | |
4402 | dev->tag_success_count = 0; | |
4403 | dev->openings++; | |
4404 | } | |
4405 | ||
4406 | if (dev->active == 0) | |
4407 | dev->commands_since_idle_or_otag = 0; | |
4408 | ||
4409 | if (TAILQ_EMPTY(&dev->busyq)) { | |
4410 | if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0 | |
4411 | && dev->active == 0 | |
4412 | && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0) | |
4413 | ahd_linux_free_device(ahd, dev); | |
4414 | } else if ((dev->flags & AHD_DEV_ON_RUN_LIST) == 0) { | |
4415 | TAILQ_INSERT_TAIL(&ahd->platform_data->device_runq, dev, links); | |
4416 | dev->flags |= AHD_DEV_ON_RUN_LIST; | |
4417 | } | |
4418 | ||
4419 | if ((scb->flags & SCB_RECOVERY_SCB) != 0) { | |
4420 | printf("Recovery SCB completes\n"); | |
4421 | if (ahd_get_transaction_status(scb) == CAM_BDR_SENT | |
4422 | || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) | |
4423 | ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); | |
4424 | if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) { | |
4425 | scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM; | |
4426 | up(&ahd->platform_data->eh_sem); | |
4427 | } | |
4428 | } | |
4429 | ||
4430 | ahd_free_scb(ahd, scb); | |
4431 | ahd_linux_queue_cmd_complete(ahd, cmd); | |
4432 | ||
4433 | if ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_EMPTY) != 0 | |
4434 | && LIST_FIRST(&ahd->pending_scbs) == NULL) { | |
4435 | ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_EMPTY; | |
4436 | up(&ahd->platform_data->dv_sem); | |
4437 | } | |
4438 | } | |
4439 | ||
4440 | static void | |
4441 | ahd_linux_handle_scsi_status(struct ahd_softc *ahd, | |
4442 | struct ahd_linux_device *dev, struct scb *scb) | |
4443 | { | |
4444 | struct ahd_devinfo devinfo; | |
4445 | ||
4446 | ahd_compile_devinfo(&devinfo, | |
4447 | ahd->our_id, | |
4448 | dev->target->target, dev->lun, | |
4449 | dev->target->channel == 0 ? 'A' : 'B', | |
4450 | ROLE_INITIATOR); | |
4451 | ||
4452 | /* | |
4453 | * We don't currently trust the mid-layer to | |
4454 | * properly deal with queue full or busy. So, | |
4455 | * when one occurs, we tell the mid-layer to | |
4456 | * unconditionally requeue the command to us | |
4457 | * so that we can retry it ourselves. We also | |
4458 | * implement our own throttling mechanism so | |
4459 | * we don't clobber the device with too many | |
4460 | * commands. | |
4461 | */ | |
4462 | switch (ahd_get_scsi_status(scb)) { | |
4463 | default: | |
4464 | break; | |
4465 | case SCSI_STATUS_CHECK_COND: | |
4466 | case SCSI_STATUS_CMD_TERMINATED: | |
4467 | { | |
4468 | Scsi_Cmnd *cmd; | |
4469 | ||
4470 | /* | |
4471 | * Copy sense information to the OS's cmd | |
4472 | * structure if it is available. | |
4473 | */ | |
4474 | cmd = scb->io_ctx; | |
4475 | if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { | |
4476 | struct scsi_status_iu_header *siu; | |
4477 | u_int sense_size; | |
4478 | u_int sense_offset; | |
4479 | ||
4480 | if (scb->flags & SCB_SENSE) { | |
4481 | sense_size = MIN(sizeof(struct scsi_sense_data) | |
4482 | - ahd_get_sense_residual(scb), | |
4483 | sizeof(cmd->sense_buffer)); | |
4484 | sense_offset = 0; | |
4485 | } else { | |
4486 | /* | |
4487 | * Copy only the sense data into the provided | |
4488 | * buffer. | |
4489 | */ | |
4490 | siu = (struct scsi_status_iu_header *) | |
4491 | scb->sense_data; | |
4492 | sense_size = MIN(scsi_4btoul(siu->sense_length), | |
4493 | sizeof(cmd->sense_buffer)); | |
4494 | sense_offset = SIU_SENSE_OFFSET(siu); | |
4495 | } | |
4496 | ||
4497 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
4498 | memcpy(cmd->sense_buffer, | |
4499 | ahd_get_sense_buf(ahd, scb) | |
4500 | + sense_offset, sense_size); | |
4501 | cmd->result |= (DRIVER_SENSE << 24); | |
4502 | ||
4503 | #ifdef AHD_DEBUG | |
4504 | if (ahd_debug & AHD_SHOW_SENSE) { | |
4505 | int i; | |
4506 | ||
4507 | printf("Copied %d bytes of sense data at %d:", | |
4508 | sense_size, sense_offset); | |
4509 | for (i = 0; i < sense_size; i++) { | |
4510 | if ((i & 0xF) == 0) | |
4511 | printf("\n"); | |
4512 | printf("0x%x ", cmd->sense_buffer[i]); | |
4513 | } | |
4514 | printf("\n"); | |
4515 | } | |
4516 | #endif | |
4517 | } | |
4518 | break; | |
4519 | } | |
4520 | case SCSI_STATUS_QUEUE_FULL: | |
4521 | { | |
4522 | /* | |
4523 | * By the time the core driver has returned this | |
4524 | * command, all other commands that were queued | |
4525 | * to us but not the device have been returned. | |
4526 | * This ensures that dev->active is equal to | |
4527 | * the number of commands actually queued to | |
4528 | * the device. | |
4529 | */ | |
4530 | dev->tag_success_count = 0; | |
4531 | if (dev->active != 0) { | |
4532 | /* | |
4533 | * Drop our opening count to the number | |
4534 | * of commands currently outstanding. | |
4535 | */ | |
4536 | dev->openings = 0; | |
4537 | #ifdef AHD_DEBUG | |
4538 | if ((ahd_debug & AHD_SHOW_QFULL) != 0) { | |
4539 | ahd_print_path(ahd, scb); | |
4540 | printf("Dropping tag count to %d\n", | |
4541 | dev->active); | |
4542 | } | |
4543 | #endif | |
4544 | if (dev->active == dev->tags_on_last_queuefull) { | |
4545 | ||
4546 | dev->last_queuefull_same_count++; | |
4547 | /* | |
4548 | * If we repeatedly see a queue full | |
4549 | * at the same queue depth, this | |
4550 | * device has a fixed number of tag | |
4551 | * slots. Lock in this tag depth | |
4552 | * so we stop seeing queue fulls from | |
4553 | * this device. | |
4554 | */ | |
4555 | if (dev->last_queuefull_same_count | |
4556 | == AHD_LOCK_TAGS_COUNT) { | |
4557 | dev->maxtags = dev->active; | |
4558 | ahd_print_path(ahd, scb); | |
4559 | printf("Locking max tag count at %d\n", | |
4560 | dev->active); | |
4561 | } | |
4562 | } else { | |
4563 | dev->tags_on_last_queuefull = dev->active; | |
4564 | dev->last_queuefull_same_count = 0; | |
4565 | } | |
4566 | ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); | |
4567 | ahd_set_scsi_status(scb, SCSI_STATUS_OK); | |
4568 | ahd_platform_set_tags(ahd, &devinfo, | |
4569 | (dev->flags & AHD_DEV_Q_BASIC) | |
4570 | ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); | |
4571 | break; | |
4572 | } | |
4573 | /* | |
4574 | * Drop down to a single opening, and treat this | |
4575 | * as if the target returned BUSY SCSI status. | |
4576 | */ | |
4577 | dev->openings = 1; | |
4578 | ahd_platform_set_tags(ahd, &devinfo, | |
4579 | (dev->flags & AHD_DEV_Q_BASIC) | |
4580 | ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); | |
4581 | ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); | |
4582 | /* FALLTHROUGH */ | |
4583 | } | |
4584 | case SCSI_STATUS_BUSY: | |
4585 | /* | |
4586 | * Set a short timer to defer sending commands for | |
4587 | * a bit since Linux will not delay in this case. | |
4588 | */ | |
4589 | if ((dev->flags & AHD_DEV_TIMER_ACTIVE) != 0) { | |
4590 | printf("%s:%c:%d: Device Timer still active during " | |
4591 | "busy processing\n", ahd_name(ahd), | |
4592 | dev->target->channel, dev->target->target); | |
4593 | break; | |
4594 | } | |
4595 | dev->flags |= AHD_DEV_TIMER_ACTIVE; | |
4596 | dev->qfrozen++; | |
4597 | init_timer(&dev->timer); | |
4598 | dev->timer.data = (u_long)dev; | |
4599 | dev->timer.expires = jiffies + (HZ/2); | |
4600 | dev->timer.function = ahd_linux_dev_timed_unfreeze; | |
4601 | add_timer(&dev->timer); | |
4602 | break; | |
4603 | } | |
4604 | } | |
4605 | ||
4606 | static void | |
4607 | ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, Scsi_Cmnd *cmd) | |
4608 | { | |
4609 | /* | |
4610 | * Typically, the complete queue has very few entries | |
4611 | * queued to it before the queue is emptied by | |
4612 | * ahd_linux_run_complete_queue, so sorting the entries | |
4613 | * by generation number should be inexpensive. | |
4614 | * We perform the sort so that commands that complete | |
4615 | * with an error are retuned in the order origionally | |
4616 | * queued to the controller so that any subsequent retries | |
4617 | * are performed in order. The underlying ahd routines do | |
4618 | * not guarantee the order that aborted commands will be | |
4619 | * returned to us. | |
4620 | */ | |
4621 | struct ahd_completeq *completeq; | |
4622 | struct ahd_cmd *list_cmd; | |
4623 | struct ahd_cmd *acmd; | |
4624 | ||
4625 | /* | |
4626 | * Map CAM error codes into Linux Error codes. We | |
4627 | * avoid the conversion so that the DV code has the | |
4628 | * full error information available when making | |
4629 | * state change decisions. | |
4630 | */ | |
4631 | if (AHD_DV_CMD(cmd) == FALSE) { | |
4632 | uint32_t status; | |
4633 | u_int new_status; | |
4634 | ||
4635 | status = ahd_cmd_get_transaction_status(cmd); | |
4636 | if (status != CAM_REQ_CMP) { | |
4637 | struct ahd_linux_device *dev; | |
4638 | struct ahd_devinfo devinfo; | |
4639 | cam_status cam_status; | |
4640 | uint32_t action; | |
4641 | u_int scsi_status; | |
4642 | ||
4643 | dev = ahd_linux_get_device(ahd, cmd->device->channel, | |
4644 | cmd->device->id, | |
4645 | cmd->device->lun, | |
4646 | /*alloc*/FALSE); | |
4647 | ||
4648 | if (dev == NULL) | |
4649 | goto no_fallback; | |
4650 | ||
4651 | ahd_compile_devinfo(&devinfo, | |
4652 | ahd->our_id, | |
4653 | dev->target->target, dev->lun, | |
4654 | dev->target->channel == 0 ? 'A':'B', | |
4655 | ROLE_INITIATOR); | |
4656 | ||
4657 | scsi_status = ahd_cmd_get_scsi_status(cmd); | |
4658 | cam_status = ahd_cmd_get_transaction_status(cmd); | |
4659 | action = aic_error_action(cmd, dev->target->inq_data, | |
4660 | cam_status, scsi_status); | |
4661 | if ((action & SSQ_FALLBACK) != 0) { | |
4662 | ||
4663 | /* Update stats */ | |
4664 | dev->target->errors_detected++; | |
4665 | if (dev->target->cmds_since_error == 0) | |
4666 | dev->target->cmds_since_error++; | |
4667 | else { | |
4668 | dev->target->cmds_since_error = 0; | |
4669 | ahd_linux_fallback(ahd, &devinfo); | |
4670 | } | |
4671 | } | |
4672 | } | |
4673 | no_fallback: | |
4674 | switch (status) { | |
4675 | case CAM_REQ_INPROG: | |
4676 | case CAM_REQ_CMP: | |
4677 | case CAM_SCSI_STATUS_ERROR: | |
4678 | new_status = DID_OK; | |
4679 | break; | |
4680 | case CAM_REQ_ABORTED: | |
4681 | new_status = DID_ABORT; | |
4682 | break; | |
4683 | case CAM_BUSY: | |
4684 | new_status = DID_BUS_BUSY; | |
4685 | break; | |
4686 | case CAM_REQ_INVALID: | |
4687 | case CAM_PATH_INVALID: | |
4688 | new_status = DID_BAD_TARGET; | |
4689 | break; | |
4690 | case CAM_SEL_TIMEOUT: | |
4691 | new_status = DID_NO_CONNECT; | |
4692 | break; | |
4693 | case CAM_SCSI_BUS_RESET: | |
4694 | case CAM_BDR_SENT: | |
4695 | new_status = DID_RESET; | |
4696 | break; | |
4697 | case CAM_UNCOR_PARITY: | |
4698 | new_status = DID_PARITY; | |
4699 | break; | |
4700 | case CAM_CMD_TIMEOUT: | |
4701 | new_status = DID_TIME_OUT; | |
4702 | break; | |
4703 | case CAM_UA_ABORT: | |
4704 | case CAM_REQ_CMP_ERR: | |
4705 | case CAM_AUTOSENSE_FAIL: | |
4706 | case CAM_NO_HBA: | |
4707 | case CAM_DATA_RUN_ERR: | |
4708 | case CAM_UNEXP_BUSFREE: | |
4709 | case CAM_SEQUENCE_FAIL: | |
4710 | case CAM_CCB_LEN_ERR: | |
4711 | case CAM_PROVIDE_FAIL: | |
4712 | case CAM_REQ_TERMIO: | |
4713 | case CAM_UNREC_HBA_ERROR: | |
4714 | case CAM_REQ_TOO_BIG: | |
4715 | new_status = DID_ERROR; | |
4716 | break; | |
4717 | case CAM_REQUEUE_REQ: | |
4718 | /* | |
4719 | * If we want the request requeued, make sure there | |
4720 | * are sufficent retries. In the old scsi error code, | |
4721 | * we used to be able to specify a result code that | |
4722 | * bypassed the retry count. Now we must use this | |
4723 | * hack. We also "fake" a check condition with | |
4724 | * a sense code of ABORTED COMMAND. This seems to | |
4725 | * evoke a retry even if this command is being sent | |
4726 | * via the eh thread. Ick! Ick! Ick! | |
4727 | */ | |
4728 | if (cmd->retries > 0) | |
4729 | cmd->retries--; | |
4730 | new_status = DID_OK; | |
4731 | ahd_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND); | |
4732 | cmd->result |= (DRIVER_SENSE << 24); | |
4733 | memset(cmd->sense_buffer, 0, | |
4734 | sizeof(cmd->sense_buffer)); | |
4735 | cmd->sense_buffer[0] = SSD_ERRCODE_VALID | |
4736 | | SSD_CURRENT_ERROR; | |
4737 | cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND; | |
4738 | break; | |
4739 | default: | |
4740 | /* We should never get here */ | |
4741 | new_status = DID_ERROR; | |
4742 | break; | |
4743 | } | |
4744 | ||
4745 | ahd_cmd_set_transaction_status(cmd, new_status); | |
4746 | } | |
4747 | ||
4748 | completeq = &ahd->platform_data->completeq; | |
4749 | list_cmd = TAILQ_FIRST(completeq); | |
4750 | acmd = (struct ahd_cmd *)cmd; | |
4751 | while (list_cmd != NULL | |
4752 | && acmd_scsi_cmd(list_cmd).serial_number | |
4753 | < acmd_scsi_cmd(acmd).serial_number) | |
4754 | list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe); | |
4755 | if (list_cmd != NULL) | |
4756 | TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe); | |
4757 | else | |
4758 | TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe); | |
4759 | } | |
4760 | ||
4761 | static void | |
4762 | ahd_linux_filter_inquiry(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) | |
4763 | { | |
4764 | struct scsi_inquiry_data *sid; | |
4765 | struct ahd_initiator_tinfo *tinfo; | |
4766 | struct ahd_transinfo *user; | |
4767 | struct ahd_transinfo *goal; | |
4768 | struct ahd_transinfo *curr; | |
4769 | struct ahd_tmode_tstate *tstate; | |
4770 | struct ahd_linux_device *dev; | |
4771 | u_int width; | |
4772 | u_int period; | |
4773 | u_int offset; | |
4774 | u_int ppr_options; | |
4775 | u_int trans_version; | |
4776 | u_int prot_version; | |
4777 | ||
4778 | /* | |
4779 | * Determine if this lun actually exists. If so, | |
4780 | * hold on to its corresponding device structure. | |
4781 | * If not, make sure we release the device and | |
4782 | * don't bother processing the rest of this inquiry | |
4783 | * command. | |
4784 | */ | |
4785 | dev = ahd_linux_get_device(ahd, devinfo->channel - 'A', | |
4786 | devinfo->target, devinfo->lun, | |
4787 | /*alloc*/TRUE); | |
4788 | ||
4789 | sid = (struct scsi_inquiry_data *)dev->target->inq_data; | |
4790 | if (SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) { | |
4791 | ||
4792 | dev->flags &= ~AHD_DEV_UNCONFIGURED; | |
4793 | } else { | |
4794 | dev->flags |= AHD_DEV_UNCONFIGURED; | |
4795 | return; | |
4796 | } | |
4797 | ||
4798 | /* | |
4799 | * Update our notion of this device's transfer | |
4800 | * negotiation capabilities. | |
4801 | */ | |
4802 | tinfo = ahd_fetch_transinfo(ahd, devinfo->channel, | |
4803 | devinfo->our_scsiid, | |
4804 | devinfo->target, &tstate); | |
4805 | user = &tinfo->user; | |
4806 | goal = &tinfo->goal; | |
4807 | curr = &tinfo->curr; | |
4808 | width = user->width; | |
4809 | period = user->period; | |
4810 | offset = user->offset; | |
4811 | ppr_options = user->ppr_options; | |
4812 | trans_version = user->transport_version; | |
4813 | prot_version = MIN(user->protocol_version, SID_ANSI_REV(sid)); | |
4814 | ||
4815 | /* | |
4816 | * Only attempt SPI3/4 once we've verified that | |
4817 | * the device claims to support SPI3/4 features. | |
4818 | */ | |
4819 | if (prot_version < SCSI_REV_2) | |
4820 | trans_version = SID_ANSI_REV(sid); | |
4821 | else | |
4822 | trans_version = SCSI_REV_2; | |
4823 | ||
4824 | if ((sid->flags & SID_WBus16) == 0) | |
4825 | width = MSG_EXT_WDTR_BUS_8_BIT; | |
4826 | if ((sid->flags & SID_Sync) == 0) { | |
4827 | period = 0; | |
4828 | offset = 0; | |
4829 | ppr_options = 0; | |
4830 | } | |
4831 | if ((sid->spi3data & SID_SPI_QAS) == 0) | |
4832 | ppr_options &= ~MSG_EXT_PPR_QAS_REQ; | |
4833 | if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0) | |
4834 | ppr_options &= MSG_EXT_PPR_QAS_REQ; | |
4835 | if ((sid->spi3data & SID_SPI_IUS) == 0) | |
4836 | ppr_options &= (MSG_EXT_PPR_DT_REQ | |
4837 | | MSG_EXT_PPR_QAS_REQ); | |
4838 | ||
4839 | if (prot_version > SCSI_REV_2 | |
4840 | && ppr_options != 0) | |
4841 | trans_version = user->transport_version; | |
4842 | ||
4843 | ahd_validate_width(ahd, /*tinfo limit*/NULL, &width, ROLE_UNKNOWN); | |
4844 | ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX); | |
4845 | ahd_validate_offset(ahd, /*tinfo limit*/NULL, period, | |
4846 | &offset, width, ROLE_UNKNOWN); | |
4847 | if (offset == 0 || period == 0) { | |
4848 | period = 0; | |
4849 | offset = 0; | |
4850 | ppr_options = 0; | |
4851 | } | |
4852 | /* Apply our filtered user settings. */ | |
4853 | curr->transport_version = trans_version; | |
4854 | curr->protocol_version = prot_version; | |
4855 | ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, /*paused*/FALSE); | |
4856 | ahd_set_syncrate(ahd, devinfo, period, offset, ppr_options, | |
4857 | AHD_TRANS_GOAL, /*paused*/FALSE); | |
4858 | } | |
4859 | ||
4860 | void | |
4861 | ahd_freeze_simq(struct ahd_softc *ahd) | |
4862 | { | |
4863 | ahd->platform_data->qfrozen++; | |
4864 | if (ahd->platform_data->qfrozen == 1) { | |
4865 | scsi_block_requests(ahd->platform_data->host); | |
4866 | ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS, | |
4867 | CAM_LUN_WILDCARD, SCB_LIST_NULL, | |
4868 | ROLE_INITIATOR, CAM_REQUEUE_REQ); | |
4869 | } | |
4870 | } | |
4871 | ||
4872 | void | |
4873 | ahd_release_simq(struct ahd_softc *ahd) | |
4874 | { | |
4875 | u_long s; | |
4876 | int unblock_reqs; | |
4877 | ||
4878 | unblock_reqs = 0; | |
4879 | ahd_lock(ahd, &s); | |
4880 | if (ahd->platform_data->qfrozen > 0) | |
4881 | ahd->platform_data->qfrozen--; | |
4882 | if (ahd->platform_data->qfrozen == 0) { | |
4883 | unblock_reqs = 1; | |
4884 | } | |
4885 | if (AHD_DV_SIMQ_FROZEN(ahd) | |
4886 | && ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_RELEASE) != 0)) { | |
4887 | ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_RELEASE; | |
4888 | up(&ahd->platform_data->dv_sem); | |
4889 | } | |
4890 | ahd_schedule_runq(ahd); | |
4891 | ahd_unlock(ahd, &s); | |
4892 | /* | |
4893 | * There is still a race here. The mid-layer | |
4894 | * should keep its own freeze count and use | |
4895 | * a bottom half handler to run the queues | |
4896 | * so we can unblock with our own lock held. | |
4897 | */ | |
4898 | if (unblock_reqs) | |
4899 | scsi_unblock_requests(ahd->platform_data->host); | |
4900 | } | |
4901 | ||
4902 | static void | |
4903 | ahd_linux_sem_timeout(u_long arg) | |
4904 | { | |
4905 | struct scb *scb; | |
4906 | struct ahd_softc *ahd; | |
4907 | u_long s; | |
4908 | ||
4909 | scb = (struct scb *)arg; | |
4910 | ahd = scb->ahd_softc; | |
4911 | ahd_lock(ahd, &s); | |
4912 | if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) { | |
4913 | scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM; | |
4914 | up(&ahd->platform_data->eh_sem); | |
4915 | } | |
4916 | ahd_unlock(ahd, &s); | |
4917 | } | |
4918 | ||
4919 | static void | |
4920 | ahd_linux_dev_timed_unfreeze(u_long arg) | |
4921 | { | |
4922 | struct ahd_linux_device *dev; | |
4923 | struct ahd_softc *ahd; | |
4924 | u_long s; | |
4925 | ||
4926 | dev = (struct ahd_linux_device *)arg; | |
4927 | ahd = dev->target->ahd; | |
4928 | ahd_lock(ahd, &s); | |
4929 | dev->flags &= ~AHD_DEV_TIMER_ACTIVE; | |
4930 | if (dev->qfrozen > 0) | |
4931 | dev->qfrozen--; | |
4932 | if (dev->qfrozen == 0 | |
4933 | && (dev->flags & AHD_DEV_ON_RUN_LIST) == 0) | |
4934 | ahd_linux_run_device_queue(ahd, dev); | |
4935 | if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0 | |
4936 | && dev->active == 0) | |
4937 | ahd_linux_free_device(ahd, dev); | |
4938 | ahd_unlock(ahd, &s); | |
4939 | } | |
4940 | ||
4941 | void | |
4942 | ahd_platform_dump_card_state(struct ahd_softc *ahd) | |
4943 | { | |
4944 | struct ahd_linux_device *dev; | |
4945 | int target; | |
4946 | int maxtarget; | |
4947 | int lun; | |
4948 | int i; | |
4949 | ||
4950 | maxtarget = (ahd->features & AHD_WIDE) ? 15 : 7; | |
4951 | for (target = 0; target <=maxtarget; target++) { | |
4952 | ||
4953 | for (lun = 0; lun < AHD_NUM_LUNS; lun++) { | |
4954 | struct ahd_cmd *acmd; | |
4955 | ||
4956 | dev = ahd_linux_get_device(ahd, 0, target, | |
4957 | lun, /*alloc*/FALSE); | |
4958 | if (dev == NULL) | |
4959 | continue; | |
4960 | ||
4961 | printf("DevQ(%d:%d:%d): ", 0, target, lun); | |
4962 | i = 0; | |
4963 | TAILQ_FOREACH(acmd, &dev->busyq, acmd_links.tqe) { | |
4964 | if (i++ > AHD_SCB_MAX) | |
4965 | break; | |
4966 | } | |
4967 | printf("%d waiting\n", i); | |
4968 | } | |
4969 | } | |
4970 | } | |
4971 | ||
4972 | static int __init | |
4973 | ahd_linux_init(void) | |
4974 | { | |
4975 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) | |
4976 | return ahd_linux_detect(&aic79xx_driver_template); | |
4977 | #else | |
4978 | scsi_register_module(MODULE_SCSI_HA, &aic79xx_driver_template); | |
4979 | if (aic79xx_driver_template.present == 0) { | |
4980 | scsi_unregister_module(MODULE_SCSI_HA, | |
4981 | &aic79xx_driver_template); | |
4982 | return (-ENODEV); | |
4983 | } | |
4984 | ||
4985 | return (0); | |
4986 | #endif | |
4987 | } | |
4988 | ||
4989 | static void __exit | |
4990 | ahd_linux_exit(void) | |
4991 | { | |
4992 | struct ahd_softc *ahd; | |
4993 | ||
4994 | /* | |
4995 | * Shutdown DV threads before going into the SCSI mid-layer. | |
4996 | * This avoids situations where the mid-layer locks the entire | |
4997 | * kernel so that waiting for our DV threads to exit leads | |
4998 | * to deadlock. | |
4999 | */ | |
5000 | TAILQ_FOREACH(ahd, &ahd_tailq, links) { | |
5001 | ||
5002 | ahd_linux_kill_dv_thread(ahd); | |
5003 | } | |
5004 | ||
5005 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) | |
5006 | /* | |
5007 | * In 2.4 we have to unregister from the PCI core _after_ | |
5008 | * unregistering from the scsi midlayer to avoid dangling | |
5009 | * references. | |
5010 | */ | |
5011 | scsi_unregister_module(MODULE_SCSI_HA, &aic79xx_driver_template); | |
5012 | #endif | |
5013 | ahd_linux_pci_exit(); | |
5014 | } | |
5015 | ||
5016 | module_init(ahd_linux_init); | |
5017 | module_exit(ahd_linux_exit); |