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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 */ | |
1da177e4 LT |
56 | #include <linux/mm.h> /* For fetching system memory size */ |
57 | #include <linux/delay.h> /* For ssleep/msleep */ | |
58 | ||
59 | /* | |
60 | * Lock protecting manipulation of the ahd softc list. | |
61 | */ | |
62 | spinlock_t ahd_list_spinlock; | |
63 | ||
1da177e4 LT |
64 | /* |
65 | * Bucket size for counting good commands in between bad ones. | |
66 | */ | |
67 | #define AHD_LINUX_ERR_THRESH 1000 | |
68 | ||
69 | /* | |
70 | * Set this to the delay in seconds after SCSI bus reset. | |
71 | * Note, we honor this only for the initial bus reset. | |
72 | * The scsi error recovery code performs its own bus settle | |
73 | * delay handling for error recovery actions. | |
74 | */ | |
75 | #ifdef CONFIG_AIC79XX_RESET_DELAY_MS | |
76 | #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS | |
77 | #else | |
78 | #define AIC79XX_RESET_DELAY 5000 | |
79 | #endif | |
80 | ||
81 | /* | |
82 | * To change the default number of tagged transactions allowed per-device, | |
83 | * add a line to the lilo.conf file like: | |
84 | * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" | |
85 | * which will result in the first four devices on the first two | |
86 | * controllers being set to a tagged queue depth of 32. | |
87 | * | |
88 | * The tag_commands is an array of 16 to allow for wide and twin adapters. | |
89 | * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 | |
90 | * for channel 1. | |
91 | */ | |
92 | typedef struct { | |
93 | uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ | |
94 | } adapter_tag_info_t; | |
95 | ||
96 | /* | |
97 | * Modify this as you see fit for your system. | |
98 | * | |
99 | * 0 tagged queuing disabled | |
100 | * 1 <= n <= 253 n == max tags ever dispatched. | |
101 | * | |
102 | * The driver will throttle the number of commands dispatched to a | |
103 | * device if it returns queue full. For devices with a fixed maximum | |
104 | * queue depth, the driver will eventually determine this depth and | |
105 | * lock it in (a console message is printed to indicate that a lock | |
106 | * has occurred). On some devices, queue full is returned for a temporary | |
107 | * resource shortage. These devices will return queue full at varying | |
108 | * depths. The driver will throttle back when the queue fulls occur and | |
109 | * attempt to slowly increase the depth over time as the device recovers | |
110 | * from the resource shortage. | |
111 | * | |
112 | * In this example, the first line will disable tagged queueing for all | |
113 | * the devices on the first probed aic79xx adapter. | |
114 | * | |
115 | * The second line enables tagged queueing with 4 commands/LUN for IDs | |
116 | * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the | |
117 | * driver to attempt to use up to 64 tags for ID 1. | |
118 | * | |
119 | * The third line is the same as the first line. | |
120 | * | |
121 | * The fourth line disables tagged queueing for devices 0 and 3. It | |
122 | * enables tagged queueing for the other IDs, with 16 commands/LUN | |
123 | * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for | |
124 | * IDs 2, 5-7, and 9-15. | |
125 | */ | |
126 | ||
127 | /* | |
128 | * NOTE: The below structure is for reference only, the actual structure | |
129 | * to modify in order to change things is just below this comment block. | |
130 | adapter_tag_info_t aic79xx_tag_info[] = | |
131 | { | |
132 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
133 | {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, | |
134 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
135 | {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} | |
136 | }; | |
137 | */ | |
138 | ||
139 | #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE | |
140 | #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE | |
141 | #else | |
142 | #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE | |
143 | #endif | |
144 | ||
145 | #define AIC79XX_CONFIGED_TAG_COMMANDS { \ | |
146 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
147 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
148 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
149 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
150 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
151 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
152 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ | |
153 | AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ | |
154 | } | |
155 | ||
156 | /* | |
157 | * By default, use the number of commands specified by | |
158 | * the users kernel configuration. | |
159 | */ | |
160 | static adapter_tag_info_t aic79xx_tag_info[] = | |
161 | { | |
162 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
163 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
164 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
165 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
166 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
167 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
168 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
169 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
170 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
171 | {AIC79XX_CONFIGED_TAG_COMMANDS}, | |
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 | }; | |
179 | ||
180 | /* | |
181 | * By default, read streaming is disabled. In theory, | |
182 | * read streaming should enhance performance, but early | |
183 | * U320 drive firmware actually performs slower with | |
184 | * read streaming enabled. | |
185 | */ | |
186 | #ifdef CONFIG_AIC79XX_ENABLE_RD_STRM | |
187 | #define AIC79XX_CONFIGED_RD_STRM 0xFFFF | |
188 | #else | |
189 | #define AIC79XX_CONFIGED_RD_STRM 0 | |
190 | #endif | |
191 | ||
192 | static uint16_t aic79xx_rd_strm_info[] = | |
193 | { | |
194 | AIC79XX_CONFIGED_RD_STRM, | |
195 | AIC79XX_CONFIGED_RD_STRM, | |
196 | AIC79XX_CONFIGED_RD_STRM, | |
197 | AIC79XX_CONFIGED_RD_STRM, | |
198 | AIC79XX_CONFIGED_RD_STRM, | |
199 | AIC79XX_CONFIGED_RD_STRM, | |
200 | AIC79XX_CONFIGED_RD_STRM, | |
201 | AIC79XX_CONFIGED_RD_STRM, | |
202 | AIC79XX_CONFIGED_RD_STRM, | |
203 | AIC79XX_CONFIGED_RD_STRM, | |
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 | }; | |
211 | ||
212 | /* | |
213 | * DV option: | |
214 | * | |
215 | * positive value = DV Enabled | |
216 | * zero = DV Disabled | |
217 | * negative value = DV Default for adapter type/seeprom | |
218 | */ | |
219 | #ifdef CONFIG_AIC79XX_DV_SETTING | |
220 | #define AIC79XX_CONFIGED_DV CONFIG_AIC79XX_DV_SETTING | |
221 | #else | |
222 | #define AIC79XX_CONFIGED_DV -1 | |
223 | #endif | |
224 | ||
225 | static int8_t aic79xx_dv_settings[] = | |
226 | { | |
227 | AIC79XX_CONFIGED_DV, | |
228 | AIC79XX_CONFIGED_DV, | |
229 | AIC79XX_CONFIGED_DV, | |
230 | AIC79XX_CONFIGED_DV, | |
231 | AIC79XX_CONFIGED_DV, | |
232 | AIC79XX_CONFIGED_DV, | |
233 | AIC79XX_CONFIGED_DV, | |
234 | AIC79XX_CONFIGED_DV, | |
235 | AIC79XX_CONFIGED_DV, | |
236 | AIC79XX_CONFIGED_DV, | |
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 | }; | |
244 | ||
245 | /* | |
246 | * The I/O cell on the chip is very configurable in respect to its analog | |
247 | * characteristics. Set the defaults here; they can be overriden with | |
248 | * the proper insmod parameters. | |
249 | */ | |
250 | struct ahd_linux_iocell_opts | |
251 | { | |
252 | uint8_t precomp; | |
253 | uint8_t slewrate; | |
254 | uint8_t amplitude; | |
255 | }; | |
256 | #define AIC79XX_DEFAULT_PRECOMP 0xFF | |
257 | #define AIC79XX_DEFAULT_SLEWRATE 0xFF | |
258 | #define AIC79XX_DEFAULT_AMPLITUDE 0xFF | |
259 | #define AIC79XX_DEFAULT_IOOPTS \ | |
260 | { \ | |
261 | AIC79XX_DEFAULT_PRECOMP, \ | |
262 | AIC79XX_DEFAULT_SLEWRATE, \ | |
263 | AIC79XX_DEFAULT_AMPLITUDE \ | |
264 | } | |
265 | #define AIC79XX_PRECOMP_INDEX 0 | |
266 | #define AIC79XX_SLEWRATE_INDEX 1 | |
267 | #define AIC79XX_AMPLITUDE_INDEX 2 | |
268 | static struct ahd_linux_iocell_opts aic79xx_iocell_info[] = | |
269 | { | |
270 | AIC79XX_DEFAULT_IOOPTS, | |
271 | AIC79XX_DEFAULT_IOOPTS, | |
272 | AIC79XX_DEFAULT_IOOPTS, | |
273 | AIC79XX_DEFAULT_IOOPTS, | |
274 | AIC79XX_DEFAULT_IOOPTS, | |
275 | AIC79XX_DEFAULT_IOOPTS, | |
276 | AIC79XX_DEFAULT_IOOPTS, | |
277 | AIC79XX_DEFAULT_IOOPTS, | |
278 | AIC79XX_DEFAULT_IOOPTS, | |
279 | AIC79XX_DEFAULT_IOOPTS, | |
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 | }; | |
287 | ||
288 | /* | |
289 | * There should be a specific return value for this in scsi.h, but | |
290 | * it seems that most drivers ignore it. | |
291 | */ | |
292 | #define DID_UNDERFLOW DID_ERROR | |
293 | ||
294 | void | |
295 | ahd_print_path(struct ahd_softc *ahd, struct scb *scb) | |
296 | { | |
297 | printk("(scsi%d:%c:%d:%d): ", | |
298 | ahd->platform_data->host->host_no, | |
299 | scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', | |
300 | scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, | |
301 | scb != NULL ? SCB_GET_LUN(scb) : -1); | |
302 | } | |
303 | ||
304 | /* | |
305 | * XXX - these options apply unilaterally to _all_ adapters | |
306 | * cards in the system. This should be fixed. Exceptions to this | |
307 | * rule are noted in the comments. | |
308 | */ | |
309 | ||
310 | /* | |
311 | * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This | |
312 | * has no effect on any later resets that might occur due to things like | |
313 | * SCSI bus timeouts. | |
314 | */ | |
315 | static uint32_t aic79xx_no_reset; | |
316 | ||
317 | /* | |
318 | * Certain PCI motherboards will scan PCI devices from highest to lowest, | |
319 | * others scan from lowest to highest, and they tend to do all kinds of | |
320 | * strange things when they come into contact with PCI bridge chips. The | |
321 | * net result of all this is that the PCI card that is actually used to boot | |
322 | * the machine is very hard to detect. Most motherboards go from lowest | |
323 | * PCI slot number to highest, and the first SCSI controller found is the | |
324 | * one you boot from. The only exceptions to this are when a controller | |
325 | * has its BIOS disabled. So, we by default sort all of our SCSI controllers | |
326 | * from lowest PCI slot number to highest PCI slot number. We also force | |
327 | * all controllers with their BIOS disabled to the end of the list. This | |
328 | * works on *almost* all computers. Where it doesn't work, we have this | |
329 | * option. Setting this option to non-0 will reverse the order of the sort | |
330 | * to highest first, then lowest, but will still leave cards with their BIOS | |
331 | * disabled at the very end. That should fix everyone up unless there are | |
332 | * really strange cirumstances. | |
333 | */ | |
334 | static uint32_t aic79xx_reverse_scan; | |
335 | ||
336 | /* | |
337 | * Should we force EXTENDED translation on a controller. | |
338 | * 0 == Use whatever is in the SEEPROM or default to off | |
339 | * 1 == Use whatever is in the SEEPROM or default to on | |
340 | */ | |
341 | static uint32_t aic79xx_extended; | |
342 | ||
343 | /* | |
344 | * PCI bus parity checking of the Adaptec controllers. This is somewhat | |
345 | * dubious at best. To my knowledge, this option has never actually | |
346 | * solved a PCI parity problem, but on certain machines with broken PCI | |
347 | * chipset configurations, it can generate tons of false error messages. | |
348 | * It's included in the driver for completeness. | |
349 | * 0 = Shut off PCI parity check | |
350 | * non-0 = Enable PCI parity check | |
351 | * | |
352 | * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this | |
353 | * variable to -1 you would actually want to simply pass the variable | |
354 | * name without a number. That will invert the 0 which will result in | |
355 | * -1. | |
356 | */ | |
357 | static uint32_t aic79xx_pci_parity = ~0; | |
358 | ||
359 | /* | |
360 | * There are lots of broken chipsets in the world. Some of them will | |
361 | * violate the PCI spec when we issue byte sized memory writes to our | |
362 | * controller. I/O mapped register access, if allowed by the given | |
363 | * platform, will work in almost all cases. | |
364 | */ | |
365 | uint32_t aic79xx_allow_memio = ~0; | |
366 | ||
367 | /* | |
368 | * aic79xx_detect() has been run, so register all device arrivals | |
369 | * immediately with the system rather than deferring to the sorted | |
370 | * attachment performed by aic79xx_detect(). | |
371 | */ | |
372 | int aic79xx_detect_complete; | |
373 | ||
374 | /* | |
375 | * So that we can set how long each device is given as a selection timeout. | |
376 | * The table of values goes like this: | |
377 | * 0 - 256ms | |
378 | * 1 - 128ms | |
379 | * 2 - 64ms | |
380 | * 3 - 32ms | |
381 | * We default to 256ms because some older devices need a longer time | |
382 | * to respond to initial selection. | |
383 | */ | |
384 | static uint32_t aic79xx_seltime; | |
385 | ||
386 | /* | |
387 | * Certain devices do not perform any aging on commands. Should the | |
388 | * device be saturated by commands in one portion of the disk, it is | |
389 | * possible for transactions on far away sectors to never be serviced. | |
390 | * To handle these devices, we can periodically send an ordered tag to | |
391 | * force all outstanding transactions to be serviced prior to a new | |
392 | * transaction. | |
393 | */ | |
394 | uint32_t aic79xx_periodic_otag; | |
395 | ||
396 | /* | |
397 | * Module information and settable options. | |
398 | */ | |
399 | static char *aic79xx = NULL; | |
400 | ||
401 | MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); | |
402 | MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver"); | |
403 | MODULE_LICENSE("Dual BSD/GPL"); | |
404 | MODULE_VERSION(AIC79XX_DRIVER_VERSION); | |
405 | module_param(aic79xx, charp, 0); | |
406 | MODULE_PARM_DESC(aic79xx, | |
407 | "period delimited, options string.\n" | |
408 | " verbose Enable verbose/diagnostic logging\n" | |
409 | " allow_memio Allow device registers to be memory mapped\n" | |
410 | " debug Bitmask of debug values to enable\n" | |
411 | " no_reset Supress initial bus resets\n" | |
412 | " extended Enable extended geometry on all controllers\n" | |
413 | " periodic_otag Send an ordered tagged transaction\n" | |
414 | " periodically to prevent tag starvation.\n" | |
415 | " This may be required by some older disk\n" | |
416 | " or drives/RAID arrays.\n" | |
417 | " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n" | |
418 | " tag_info:<tag_str> Set per-target tag depth\n" | |
419 | " global_tag_depth:<int> Global tag depth for all targets on all buses\n" | |
420 | " rd_strm:<rd_strm_masks> Set per-target read streaming setting.\n" | |
421 | " dv:<dv_settings> Set per-controller Domain Validation Setting.\n" | |
422 | " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" | |
423 | " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" | |
424 | " amplitude:<int> Set the signal amplitude (0-7).\n" | |
425 | " seltime:<int> Selection Timeout:\n" | |
426 | " (0/256ms,1/128ms,2/64ms,3/32ms)\n" | |
427 | "\n" | |
428 | " Sample /etc/modprobe.conf line:\n" | |
429 | " Enable verbose logging\n" | |
430 | " Set tag depth on Controller 2/Target 2 to 10 tags\n" | |
431 | " Shorten the selection timeout to 128ms\n" | |
432 | "\n" | |
433 | " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" | |
434 | "\n" | |
435 | " Sample /etc/modprobe.conf line:\n" | |
436 | " Change Read Streaming for Controller's 2 and 3\n" | |
437 | "\n" | |
438 | " options aic79xx 'aic79xx=rd_strm:{..0xFFF0.0xC0F0}'"); | |
439 | ||
440 | static void ahd_linux_handle_scsi_status(struct ahd_softc *, | |
441 | struct ahd_linux_device *, | |
442 | struct scb *); | |
443 | static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, | |
444 | Scsi_Cmnd *cmd); | |
445 | static void ahd_linux_filter_inquiry(struct ahd_softc *ahd, | |
446 | struct ahd_devinfo *devinfo); | |
447 | static void ahd_linux_dev_timed_unfreeze(u_long arg); | |
448 | static void ahd_linux_sem_timeout(u_long arg); | |
449 | static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); | |
1da177e4 LT |
450 | static void ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd); |
451 | static void ahd_linux_start_dv(struct ahd_softc *ahd); | |
452 | static void ahd_linux_dv_timeout(struct scsi_cmnd *cmd); | |
453 | static int ahd_linux_dv_thread(void *data); | |
454 | static void ahd_linux_kill_dv_thread(struct ahd_softc *ahd); | |
455 | static void ahd_linux_dv_target(struct ahd_softc *ahd, u_int target); | |
456 | static void ahd_linux_dv_transition(struct ahd_softc *ahd, | |
457 | struct scsi_cmnd *cmd, | |
458 | struct ahd_devinfo *devinfo, | |
459 | struct ahd_linux_target *targ); | |
460 | static void ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, | |
461 | struct scsi_cmnd *cmd, | |
462 | struct ahd_devinfo *devinfo); | |
463 | static void ahd_linux_dv_inq(struct ahd_softc *ahd, | |
464 | struct scsi_cmnd *cmd, | |
465 | struct ahd_devinfo *devinfo, | |
466 | struct ahd_linux_target *targ, | |
467 | u_int request_length); | |
468 | static void ahd_linux_dv_tur(struct ahd_softc *ahd, | |
469 | struct scsi_cmnd *cmd, | |
470 | struct ahd_devinfo *devinfo); | |
471 | static void ahd_linux_dv_rebd(struct ahd_softc *ahd, | |
472 | struct scsi_cmnd *cmd, | |
473 | struct ahd_devinfo *devinfo, | |
474 | struct ahd_linux_target *targ); | |
475 | static void ahd_linux_dv_web(struct ahd_softc *ahd, | |
476 | struct scsi_cmnd *cmd, | |
477 | struct ahd_devinfo *devinfo, | |
478 | struct ahd_linux_target *targ); | |
479 | static void ahd_linux_dv_reb(struct ahd_softc *ahd, | |
480 | struct scsi_cmnd *cmd, | |
481 | struct ahd_devinfo *devinfo, | |
482 | struct ahd_linux_target *targ); | |
483 | static void ahd_linux_dv_su(struct ahd_softc *ahd, | |
484 | struct scsi_cmnd *cmd, | |
485 | struct ahd_devinfo *devinfo, | |
486 | struct ahd_linux_target *targ); | |
487 | static int ahd_linux_fallback(struct ahd_softc *ahd, | |
488 | struct ahd_devinfo *devinfo); | |
489 | static __inline int ahd_linux_dv_fallback(struct ahd_softc *ahd, | |
490 | struct ahd_devinfo *devinfo); | |
491 | static void ahd_linux_dv_complete(Scsi_Cmnd *cmd); | |
492 | static void ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ); | |
493 | static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, | |
494 | struct ahd_devinfo *devinfo); | |
495 | static u_int ahd_linux_user_dv_setting(struct ahd_softc *ahd); | |
496 | static void ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd); | |
497 | static void ahd_linux_device_queue_depth(struct ahd_softc *ahd, | |
498 | struct ahd_linux_device *dev); | |
499 | static struct ahd_linux_target* ahd_linux_alloc_target(struct ahd_softc*, | |
500 | u_int, u_int); | |
501 | static void ahd_linux_free_target(struct ahd_softc*, | |
502 | struct ahd_linux_target*); | |
503 | static struct ahd_linux_device* ahd_linux_alloc_device(struct ahd_softc*, | |
504 | struct ahd_linux_target*, | |
505 | u_int); | |
506 | static void ahd_linux_free_device(struct ahd_softc*, | |
507 | struct ahd_linux_device*); | |
60a13213 HR |
508 | static int ahd_linux_run_command(struct ahd_softc*, |
509 | struct ahd_linux_device*, | |
510 | struct scsi_cmnd *); | |
1da177e4 LT |
511 | static void ahd_linux_setup_tag_info_global(char *p); |
512 | static aic_option_callback_t ahd_linux_setup_tag_info; | |
513 | static aic_option_callback_t ahd_linux_setup_rd_strm_info; | |
514 | static aic_option_callback_t ahd_linux_setup_dv; | |
515 | static aic_option_callback_t ahd_linux_setup_iocell_info; | |
516 | static int ahd_linux_next_unit(void); | |
1da177e4 LT |
517 | static int aic79xx_setup(char *c); |
518 | ||
519 | /****************************** Inlines ***************************************/ | |
520 | static __inline void ahd_schedule_completeq(struct ahd_softc *ahd); | |
1da177e4 LT |
521 | static __inline struct ahd_linux_device* |
522 | ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, | |
523 | u_int target, u_int lun, int alloc); | |
524 | static struct ahd_cmd *ahd_linux_run_complete_queue(struct ahd_softc *ahd); | |
1da177e4 LT |
525 | static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); |
526 | ||
527 | static __inline void | |
528 | ahd_schedule_completeq(struct ahd_softc *ahd) | |
529 | { | |
530 | if ((ahd->platform_data->flags & AHD_RUN_CMPLT_Q_TIMER) == 0) { | |
531 | ahd->platform_data->flags |= AHD_RUN_CMPLT_Q_TIMER; | |
532 | ahd->platform_data->completeq_timer.expires = jiffies; | |
533 | add_timer(&ahd->platform_data->completeq_timer); | |
534 | } | |
535 | } | |
536 | ||
1da177e4 LT |
537 | static __inline struct ahd_linux_device* |
538 | ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, u_int target, | |
539 | u_int lun, int alloc) | |
540 | { | |
541 | struct ahd_linux_target *targ; | |
542 | struct ahd_linux_device *dev; | |
543 | u_int target_offset; | |
544 | ||
545 | target_offset = target; | |
546 | if (channel != 0) | |
547 | target_offset += 8; | |
548 | targ = ahd->platform_data->targets[target_offset]; | |
549 | if (targ == NULL) { | |
550 | if (alloc != 0) { | |
551 | targ = ahd_linux_alloc_target(ahd, channel, target); | |
552 | if (targ == NULL) | |
553 | return (NULL); | |
554 | } else | |
555 | return (NULL); | |
556 | } | |
557 | dev = targ->devices[lun]; | |
558 | if (dev == NULL && alloc != 0) | |
559 | dev = ahd_linux_alloc_device(ahd, targ, lun); | |
560 | return (dev); | |
561 | } | |
562 | ||
563 | #define AHD_LINUX_MAX_RETURNED_ERRORS 4 | |
564 | static struct ahd_cmd * | |
565 | ahd_linux_run_complete_queue(struct ahd_softc *ahd) | |
566 | { | |
567 | struct ahd_cmd *acmd; | |
568 | u_long done_flags; | |
569 | int with_errors; | |
570 | ||
571 | with_errors = 0; | |
572 | ahd_done_lock(ahd, &done_flags); | |
573 | while ((acmd = TAILQ_FIRST(&ahd->platform_data->completeq)) != NULL) { | |
574 | Scsi_Cmnd *cmd; | |
575 | ||
576 | if (with_errors > AHD_LINUX_MAX_RETURNED_ERRORS) { | |
577 | /* | |
578 | * Linux uses stack recursion to requeue | |
579 | * commands that need to be retried. Avoid | |
580 | * blowing out the stack by "spoon feeding" | |
581 | * commands that completed with error back | |
582 | * the operating system in case they are going | |
583 | * to be retried. "ick" | |
584 | */ | |
585 | ahd_schedule_completeq(ahd); | |
586 | break; | |
587 | } | |
588 | TAILQ_REMOVE(&ahd->platform_data->completeq, | |
589 | acmd, acmd_links.tqe); | |
590 | cmd = &acmd_scsi_cmd(acmd); | |
591 | cmd->host_scribble = NULL; | |
592 | if (ahd_cmd_get_transaction_status(cmd) != DID_OK | |
593 | || (cmd->result & 0xFF) != SCSI_STATUS_OK) | |
594 | with_errors++; | |
595 | ||
596 | cmd->scsi_done(cmd); | |
597 | } | |
598 | ahd_done_unlock(ahd, &done_flags); | |
599 | return (acmd); | |
600 | } | |
601 | ||
1da177e4 LT |
602 | static __inline void |
603 | ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) | |
604 | { | |
605 | Scsi_Cmnd *cmd; | |
606 | int direction; | |
607 | ||
608 | cmd = scb->io_ctx; | |
be7db055 | 609 | direction = cmd->sc_data_direction; |
1da177e4 LT |
610 | ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); |
611 | if (cmd->use_sg != 0) { | |
612 | struct scatterlist *sg; | |
613 | ||
614 | sg = (struct scatterlist *)cmd->request_buffer; | |
615 | pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction); | |
616 | } else if (cmd->request_bufflen != 0) { | |
617 | pci_unmap_single(ahd->dev_softc, | |
618 | scb->platform_data->buf_busaddr, | |
619 | cmd->request_bufflen, direction); | |
620 | } | |
621 | } | |
622 | ||
623 | /******************************** Macros **************************************/ | |
624 | #define BUILD_SCSIID(ahd, cmd) \ | |
625 | ((((cmd)->device->id << TID_SHIFT) & TID) | (ahd)->our_id) | |
626 | ||
627 | /************************ Host template entry points *************************/ | |
628 | static int ahd_linux_detect(Scsi_Host_Template *); | |
629 | static const char *ahd_linux_info(struct Scsi_Host *); | |
630 | static int ahd_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *)); | |
1da177e4 LT |
631 | static int ahd_linux_slave_alloc(Scsi_Device *); |
632 | static int ahd_linux_slave_configure(Scsi_Device *); | |
633 | static void ahd_linux_slave_destroy(Scsi_Device *); | |
634 | #if defined(__i386__) | |
635 | static int ahd_linux_biosparam(struct scsi_device*, | |
636 | struct block_device*, sector_t, int[]); | |
637 | #endif | |
1da177e4 LT |
638 | static int ahd_linux_bus_reset(Scsi_Cmnd *); |
639 | static int ahd_linux_dev_reset(Scsi_Cmnd *); | |
640 | static int ahd_linux_abort(Scsi_Cmnd *); | |
641 | ||
1da177e4 LT |
642 | |
643 | /* | |
644 | * Try to detect an Adaptec 79XX controller. | |
645 | */ | |
646 | static int | |
647 | ahd_linux_detect(Scsi_Host_Template *template) | |
648 | { | |
649 | struct ahd_softc *ahd; | |
650 | int found; | |
651 | int error = 0; | |
652 | ||
1da177e4 LT |
653 | /* |
654 | * Sanity checking of Linux SCSI data structures so | |
655 | * that some of our hacks^H^H^H^H^Hassumptions aren't | |
656 | * violated. | |
657 | */ | |
658 | if (offsetof(struct ahd_cmd_internal, end) | |
659 | > offsetof(struct scsi_cmnd, host_scribble)) { | |
660 | printf("ahd_linux_detect: SCSI data structures changed.\n"); | |
661 | printf("ahd_linux_detect: Unable to attach\n"); | |
662 | return (0); | |
663 | } | |
60a13213 | 664 | |
1da177e4 LT |
665 | #ifdef MODULE |
666 | /* | |
667 | * If we've been passed any parameters, process them now. | |
668 | */ | |
669 | if (aic79xx) | |
670 | aic79xx_setup(aic79xx); | |
671 | #endif | |
672 | ||
673 | template->proc_name = "aic79xx"; | |
674 | ||
675 | /* | |
676 | * Initialize our softc list lock prior to | |
677 | * probing for any adapters. | |
678 | */ | |
679 | ahd_list_lockinit(); | |
680 | ||
681 | #ifdef CONFIG_PCI | |
682 | error = ahd_linux_pci_init(); | |
683 | if (error) | |
684 | return error; | |
685 | #endif | |
686 | ||
687 | /* | |
688 | * Register with the SCSI layer all | |
689 | * controllers we've found. | |
690 | */ | |
691 | found = 0; | |
692 | TAILQ_FOREACH(ahd, &ahd_tailq, links) { | |
693 | ||
694 | if (ahd_linux_register_host(ahd, template) == 0) | |
695 | found++; | |
696 | } | |
1da177e4 LT |
697 | aic79xx_detect_complete++; |
698 | return 0; | |
699 | } | |
700 | ||
1da177e4 LT |
701 | /* |
702 | * Return a string describing the driver. | |
703 | */ | |
704 | static const char * | |
705 | ahd_linux_info(struct Scsi_Host *host) | |
706 | { | |
707 | static char buffer[512]; | |
708 | char ahd_info[256]; | |
709 | char *bp; | |
710 | struct ahd_softc *ahd; | |
711 | ||
712 | bp = &buffer[0]; | |
713 | ahd = *(struct ahd_softc **)host->hostdata; | |
714 | memset(bp, 0, sizeof(buffer)); | |
715 | strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev "); | |
716 | strcat(bp, AIC79XX_DRIVER_VERSION); | |
717 | strcat(bp, "\n"); | |
718 | strcat(bp, " <"); | |
719 | strcat(bp, ahd->description); | |
720 | strcat(bp, ">\n"); | |
721 | strcat(bp, " "); | |
722 | ahd_controller_info(ahd, ahd_info); | |
723 | strcat(bp, ahd_info); | |
724 | strcat(bp, "\n"); | |
725 | ||
726 | return (bp); | |
727 | } | |
728 | ||
729 | /* | |
730 | * Queue an SCB to the controller. | |
731 | */ | |
732 | static int | |
733 | ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *)) | |
734 | { | |
735 | struct ahd_softc *ahd; | |
736 | struct ahd_linux_device *dev; | |
1da177e4 LT |
737 | |
738 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; | |
739 | ||
1da177e4 LT |
740 | /* |
741 | * Close the race of a command that was in the process of | |
742 | * being queued to us just as our simq was frozen. Let | |
743 | * DV commands through so long as we are only frozen to | |
744 | * perform DV. | |
745 | */ | |
746 | if (ahd->platform_data->qfrozen != 0 | |
747 | && AHD_DV_CMD(cmd) == 0) { | |
60a13213 | 748 | printf("%s: queue frozen\n", ahd_name(ahd)); |
1da177e4 | 749 | |
60a13213 | 750 | return SCSI_MLQUEUE_HOST_BUSY; |
1da177e4 | 751 | } |
60a13213 HR |
752 | |
753 | /* | |
754 | * Save the callback on completion function. | |
755 | */ | |
756 | cmd->scsi_done = scsi_done; | |
757 | ||
1da177e4 LT |
758 | dev = ahd_linux_get_device(ahd, cmd->device->channel, |
759 | cmd->device->id, cmd->device->lun, | |
760 | /*alloc*/TRUE); | |
60a13213 HR |
761 | BUG_ON(dev == NULL); |
762 | ||
1da177e4 | 763 | cmd->result = CAM_REQ_INPROG << 16; |
60a13213 HR |
764 | |
765 | return ahd_linux_run_command(ahd, dev, cmd); | |
1da177e4 LT |
766 | } |
767 | ||
1da177e4 LT |
768 | static int |
769 | ahd_linux_slave_alloc(Scsi_Device *device) | |
770 | { | |
771 | struct ahd_softc *ahd; | |
772 | ||
773 | ahd = *((struct ahd_softc **)device->host->hostdata); | |
774 | if (bootverbose) | |
775 | printf("%s: Slave Alloc %d\n", ahd_name(ahd), device->id); | |
776 | return (0); | |
777 | } | |
778 | ||
779 | static int | |
780 | ahd_linux_slave_configure(Scsi_Device *device) | |
781 | { | |
782 | struct ahd_softc *ahd; | |
783 | struct ahd_linux_device *dev; | |
784 | u_long flags; | |
785 | ||
786 | ahd = *((struct ahd_softc **)device->host->hostdata); | |
787 | if (bootverbose) | |
788 | printf("%s: Slave Configure %d\n", ahd_name(ahd), device->id); | |
789 | ahd_midlayer_entrypoint_lock(ahd, &flags); | |
790 | /* | |
791 | * Since Linux has attached to the device, configure | |
792 | * it so we don't free and allocate the device | |
793 | * structure on every command. | |
794 | */ | |
795 | dev = ahd_linux_get_device(ahd, device->channel, | |
796 | device->id, device->lun, | |
797 | /*alloc*/TRUE); | |
798 | if (dev != NULL) { | |
799 | dev->flags &= ~AHD_DEV_UNCONFIGURED; | |
800 | dev->flags |= AHD_DEV_SLAVE_CONFIGURED; | |
801 | dev->scsi_device = device; | |
802 | ahd_linux_device_queue_depth(ahd, dev); | |
803 | } | |
804 | ahd_midlayer_entrypoint_unlock(ahd, &flags); | |
805 | return (0); | |
806 | } | |
807 | ||
808 | static void | |
809 | ahd_linux_slave_destroy(Scsi_Device *device) | |
810 | { | |
811 | struct ahd_softc *ahd; | |
812 | struct ahd_linux_device *dev; | |
813 | u_long flags; | |
814 | ||
815 | ahd = *((struct ahd_softc **)device->host->hostdata); | |
816 | if (bootverbose) | |
817 | printf("%s: Slave Destroy %d\n", ahd_name(ahd), device->id); | |
818 | ahd_midlayer_entrypoint_lock(ahd, &flags); | |
819 | dev = ahd_linux_get_device(ahd, device->channel, | |
820 | device->id, device->lun, | |
821 | /*alloc*/FALSE); | |
822 | ||
823 | /* | |
824 | * Filter out "silly" deletions of real devices by only | |
825 | * deleting devices that have had slave_configure() | |
826 | * called on them. All other devices that have not | |
827 | * been configured will automatically be deleted by | |
828 | * the refcounting process. | |
829 | */ | |
830 | if (dev != NULL | |
831 | && (dev->flags & AHD_DEV_SLAVE_CONFIGURED) != 0) { | |
832 | dev->flags |= AHD_DEV_UNCONFIGURED; | |
60a13213 | 833 | if (dev->active == 0 |
1da177e4 LT |
834 | && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0) |
835 | ahd_linux_free_device(ahd, dev); | |
836 | } | |
837 | ahd_midlayer_entrypoint_unlock(ahd, &flags); | |
838 | } | |
1da177e4 LT |
839 | |
840 | #if defined(__i386__) | |
841 | /* | |
842 | * Return the disk geometry for the given SCSI device. | |
843 | */ | |
844 | static int | |
1da177e4 LT |
845 | ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
846 | sector_t capacity, int geom[]) | |
847 | { | |
848 | uint8_t *bh; | |
1da177e4 LT |
849 | int heads; |
850 | int sectors; | |
851 | int cylinders; | |
852 | int ret; | |
853 | int extended; | |
854 | struct ahd_softc *ahd; | |
855 | ||
856 | ahd = *((struct ahd_softc **)sdev->host->hostdata); | |
857 | ||
1da177e4 | 858 | bh = scsi_bios_ptable(bdev); |
1da177e4 LT |
859 | if (bh) { |
860 | ret = scsi_partsize(bh, capacity, | |
861 | &geom[2], &geom[0], &geom[1]); | |
1da177e4 | 862 | kfree(bh); |
1da177e4 LT |
863 | if (ret != -1) |
864 | return (ret); | |
865 | } | |
866 | heads = 64; | |
867 | sectors = 32; | |
868 | cylinders = aic_sector_div(capacity, heads, sectors); | |
869 | ||
870 | if (aic79xx_extended != 0) | |
871 | extended = 1; | |
872 | else | |
873 | extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; | |
874 | if (extended && cylinders >= 1024) { | |
875 | heads = 255; | |
876 | sectors = 63; | |
877 | cylinders = aic_sector_div(capacity, heads, sectors); | |
878 | } | |
879 | geom[0] = heads; | |
880 | geom[1] = sectors; | |
881 | geom[2] = cylinders; | |
882 | return (0); | |
883 | } | |
884 | #endif | |
885 | ||
886 | /* | |
887 | * Abort the current SCSI command(s). | |
888 | */ | |
889 | static int | |
890 | ahd_linux_abort(Scsi_Cmnd *cmd) | |
891 | { | |
892 | struct ahd_softc *ahd; | |
893 | struct ahd_cmd *acmd; | |
1da177e4 LT |
894 | struct ahd_linux_device *dev; |
895 | struct scb *pending_scb; | |
896 | u_long s; | |
897 | u_int saved_scbptr; | |
898 | u_int active_scbptr; | |
899 | u_int last_phase; | |
900 | u_int cdb_byte; | |
901 | int retval; | |
902 | int was_paused; | |
903 | int paused; | |
904 | int wait; | |
905 | int disconnected; | |
906 | ahd_mode_state saved_modes; | |
907 | ||
908 | pending_scb = NULL; | |
909 | paused = FALSE; | |
910 | wait = FALSE; | |
911 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; | |
912 | acmd = (struct ahd_cmd *)cmd; | |
913 | ||
914 | printf("%s:%d:%d:%d: Attempting to abort cmd %p:", | |
915 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
916 | cmd->device->lun, cmd); | |
917 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) | |
918 | printf(" 0x%x", cmd->cmnd[cdb_byte]); | |
919 | printf("\n"); | |
920 | ||
921 | /* | |
922 | * In all versions of Linux, we have to work around | |
923 | * a major flaw in how the mid-layer is locked down | |
924 | * if we are to sleep successfully in our error handler | |
925 | * while allowing our interrupt handler to run. Since | |
926 | * the midlayer acquires either the io_request_lock or | |
927 | * our lock prior to calling us, we must use the | |
928 | * spin_unlock_irq() method for unlocking our lock. | |
929 | * This will force interrupts to be enabled on the | |
930 | * current CPU. Since the EH thread should not have | |
931 | * been running with CPU interrupts disabled other than | |
932 | * by acquiring either the io_request_lock or our own | |
933 | * lock, this *should* be safe. | |
934 | */ | |
935 | ahd_midlayer_entrypoint_lock(ahd, &s); | |
936 | ||
937 | /* | |
938 | * First determine if we currently own this command. | |
939 | * Start by searching the device queue. If not found | |
940 | * there, check the pending_scb list. If not found | |
941 | * at all, and the system wanted us to just abort the | |
942 | * command, return success. | |
943 | */ | |
944 | dev = ahd_linux_get_device(ahd, cmd->device->channel, | |
945 | cmd->device->id, cmd->device->lun, | |
946 | /*alloc*/FALSE); | |
947 | ||
948 | if (dev == NULL) { | |
949 | /* | |
950 | * No target device for this command exists, | |
951 | * so we must not still own the command. | |
952 | */ | |
953 | printf("%s:%d:%d:%d: Is not an active device\n", | |
954 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
955 | cmd->device->lun); | |
956 | retval = SUCCESS; | |
957 | goto no_cmd; | |
958 | } | |
959 | ||
1da177e4 LT |
960 | /* |
961 | * See if we can find a matching cmd in the pending list. | |
962 | */ | |
963 | LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { | |
964 | if (pending_scb->io_ctx == cmd) | |
965 | break; | |
966 | } | |
967 | ||
968 | if (pending_scb == NULL) { | |
969 | printf("%s:%d:%d:%d: Command not found\n", | |
970 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
971 | cmd->device->lun); | |
972 | goto no_cmd; | |
973 | } | |
974 | ||
975 | if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { | |
976 | /* | |
977 | * We can't queue two recovery actions using the same SCB | |
978 | */ | |
979 | retval = FAILED; | |
980 | goto done; | |
981 | } | |
982 | ||
983 | /* | |
984 | * Ensure that the card doesn't do anything | |
985 | * behind our back. Also make sure that we | |
986 | * didn't "just" miss an interrupt that would | |
987 | * affect this cmd. | |
988 | */ | |
989 | was_paused = ahd_is_paused(ahd); | |
990 | ahd_pause_and_flushwork(ahd); | |
991 | paused = TRUE; | |
992 | ||
993 | if ((pending_scb->flags & SCB_ACTIVE) == 0) { | |
994 | printf("%s:%d:%d:%d: Command already completed\n", | |
995 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
996 | cmd->device->lun); | |
997 | goto no_cmd; | |
998 | } | |
999 | ||
1000 | printf("%s: At time of recovery, card was %spaused\n", | |
1001 | ahd_name(ahd), was_paused ? "" : "not "); | |
1002 | ahd_dump_card_state(ahd); | |
1003 | ||
1004 | disconnected = TRUE; | |
1005 | if (ahd_search_qinfifo(ahd, cmd->device->id, cmd->device->channel + 'A', | |
1006 | cmd->device->lun, SCB_GET_TAG(pending_scb), | |
1007 | ROLE_INITIATOR, CAM_REQ_ABORTED, | |
1008 | SEARCH_COMPLETE) > 0) { | |
1009 | printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", | |
1010 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
1011 | cmd->device->lun); | |
1012 | retval = SUCCESS; | |
1013 | goto done; | |
1014 | } | |
1015 | ||
1016 | saved_modes = ahd_save_modes(ahd); | |
1017 | ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); | |
1018 | last_phase = ahd_inb(ahd, LASTPHASE); | |
1019 | saved_scbptr = ahd_get_scbptr(ahd); | |
1020 | active_scbptr = saved_scbptr; | |
1021 | if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { | |
1022 | struct scb *bus_scb; | |
1023 | ||
1024 | bus_scb = ahd_lookup_scb(ahd, active_scbptr); | |
1025 | if (bus_scb == pending_scb) | |
1026 | disconnected = FALSE; | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * At this point, pending_scb is the scb associated with the | |
1031 | * passed in command. That command is currently active on the | |
1032 | * bus or is in the disconnected state. | |
1033 | */ | |
1034 | if (last_phase != P_BUSFREE | |
1035 | && SCB_GET_TAG(pending_scb) == active_scbptr) { | |
1036 | ||
1037 | /* | |
1038 | * We're active on the bus, so assert ATN | |
1039 | * and hope that the target responds. | |
1040 | */ | |
1041 | pending_scb = ahd_lookup_scb(ahd, active_scbptr); | |
1042 | pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; | |
1043 | ahd_outb(ahd, MSG_OUT, HOST_MSG); | |
1044 | ahd_outb(ahd, SCSISIGO, last_phase|ATNO); | |
1045 | printf("%s:%d:%d:%d: Device is active, asserting ATN\n", | |
1046 | ahd_name(ahd), cmd->device->channel, | |
1047 | cmd->device->id, cmd->device->lun); | |
1048 | wait = TRUE; | |
1049 | } else if (disconnected) { | |
1050 | ||
1051 | /* | |
1052 | * Actually re-queue this SCB in an attempt | |
1053 | * to select the device before it reconnects. | |
1054 | */ | |
1055 | pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; | |
1056 | ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); | |
1057 | pending_scb->hscb->cdb_len = 0; | |
1058 | pending_scb->hscb->task_attribute = 0; | |
1059 | pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; | |
1060 | ||
1061 | if ((pending_scb->flags & SCB_PACKETIZED) != 0) { | |
1062 | /* | |
1063 | * Mark the SCB has having an outstanding | |
1064 | * task management function. Should the command | |
1065 | * complete normally before the task management | |
1066 | * function can be sent, the host will be notified | |
1067 | * to abort our requeued SCB. | |
1068 | */ | |
1069 | ahd_outb(ahd, SCB_TASK_MANAGEMENT, | |
1070 | pending_scb->hscb->task_management); | |
1071 | } else { | |
1072 | /* | |
1073 | * If non-packetized, set the MK_MESSAGE control | |
1074 | * bit indicating that we desire to send a message. | |
1075 | * We also set the disconnected flag since there is | |
1076 | * no guarantee that our SCB control byte matches | |
1077 | * the version on the card. We don't want the | |
1078 | * sequencer to abort the command thinking an | |
1079 | * unsolicited reselection occurred. | |
1080 | */ | |
1081 | pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; | |
1082 | ||
1083 | /* | |
1084 | * The sequencer will never re-reference the | |
1085 | * in-core SCB. To make sure we are notified | |
1086 | * during reslection, set the MK_MESSAGE flag in | |
1087 | * the card's copy of the SCB. | |
1088 | */ | |
1089 | ahd_outb(ahd, SCB_CONTROL, | |
1090 | ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); | |
1091 | } | |
1092 | ||
1093 | /* | |
1094 | * Clear out any entries in the QINFIFO first | |
1095 | * so we are the next SCB for this target | |
1096 | * to run. | |
1097 | */ | |
1098 | ahd_search_qinfifo(ahd, cmd->device->id, | |
1099 | cmd->device->channel + 'A', cmd->device->lun, | |
1100 | SCB_LIST_NULL, ROLE_INITIATOR, | |
1101 | CAM_REQUEUE_REQ, SEARCH_COMPLETE); | |
1102 | ahd_qinfifo_requeue_tail(ahd, pending_scb); | |
1103 | ahd_set_scbptr(ahd, saved_scbptr); | |
1104 | ahd_print_path(ahd, pending_scb); | |
1105 | printf("Device is disconnected, re-queuing SCB\n"); | |
1106 | wait = TRUE; | |
1107 | } else { | |
1108 | printf("%s:%d:%d:%d: Unable to deliver message\n", | |
1109 | ahd_name(ahd), cmd->device->channel, | |
1110 | cmd->device->id, cmd->device->lun); | |
1111 | retval = FAILED; | |
1112 | goto done; | |
1113 | } | |
1114 | ||
1115 | no_cmd: | |
1116 | /* | |
1117 | * Our assumption is that if we don't have the command, no | |
1118 | * recovery action was required, so we return success. Again, | |
1119 | * the semantics of the mid-layer recovery engine are not | |
1120 | * well defined, so this may change in time. | |
1121 | */ | |
1122 | retval = SUCCESS; | |
1123 | done: | |
1124 | if (paused) | |
1125 | ahd_unpause(ahd); | |
1126 | if (wait) { | |
1127 | struct timer_list timer; | |
1128 | int ret; | |
1129 | ||
1130 | pending_scb->platform_data->flags |= AHD_SCB_UP_EH_SEM; | |
1131 | spin_unlock_irq(&ahd->platform_data->spin_lock); | |
1132 | init_timer(&timer); | |
1133 | timer.data = (u_long)pending_scb; | |
1134 | timer.expires = jiffies + (5 * HZ); | |
1135 | timer.function = ahd_linux_sem_timeout; | |
1136 | add_timer(&timer); | |
1137 | printf("Recovery code sleeping\n"); | |
1138 | down(&ahd->platform_data->eh_sem); | |
1139 | printf("Recovery code awake\n"); | |
1140 | ret = del_timer_sync(&timer); | |
1141 | if (ret == 0) { | |
1142 | printf("Timer Expired\n"); | |
1143 | retval = FAILED; | |
1144 | } | |
1145 | spin_lock_irq(&ahd->platform_data->spin_lock); | |
1146 | } | |
1da177e4 LT |
1147 | ahd_linux_run_complete_queue(ahd); |
1148 | ahd_midlayer_entrypoint_unlock(ahd, &s); | |
1149 | return (retval); | |
1150 | } | |
1151 | ||
1152 | ||
1153 | static void | |
1154 | ahd_linux_dev_reset_complete(Scsi_Cmnd *cmd) | |
1155 | { | |
1156 | free(cmd, M_DEVBUF); | |
1157 | } | |
1158 | ||
1159 | /* | |
1160 | * Attempt to send a target reset message to the device that timed out. | |
1161 | */ | |
1162 | static int | |
1163 | ahd_linux_dev_reset(Scsi_Cmnd *cmd) | |
1164 | { | |
1165 | struct ahd_softc *ahd; | |
1166 | struct scsi_cmnd *recovery_cmd; | |
1167 | struct ahd_linux_device *dev; | |
1168 | struct ahd_initiator_tinfo *tinfo; | |
1169 | struct ahd_tmode_tstate *tstate; | |
1170 | struct scb *scb; | |
1171 | struct hardware_scb *hscb; | |
1172 | u_long s; | |
1173 | struct timer_list timer; | |
1174 | int retval; | |
1175 | ||
1176 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; | |
1177 | recovery_cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK); | |
1178 | if (!recovery_cmd) | |
1179 | return (FAILED); | |
1180 | memset(recovery_cmd, 0, sizeof(struct scsi_cmnd)); | |
1181 | recovery_cmd->device = cmd->device; | |
1182 | recovery_cmd->scsi_done = ahd_linux_dev_reset_complete; | |
44456d37 | 1183 | #ifdef AHD_DEBUG |
1da177e4 LT |
1184 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) |
1185 | printf("%s:%d:%d:%d: Device reset called for cmd %p\n", | |
1186 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
1187 | cmd->device->lun, cmd); | |
1188 | #endif | |
94d0e7b8 | 1189 | ahd_lock(ahd, &s); |
1da177e4 LT |
1190 | |
1191 | dev = ahd_linux_get_device(ahd, cmd->device->channel, cmd->device->id, | |
1192 | cmd->device->lun, /*alloc*/FALSE); | |
1193 | if (dev == NULL) { | |
94d0e7b8 | 1194 | ahd_unlock(ahd, &s); |
1da177e4 LT |
1195 | kfree(recovery_cmd); |
1196 | return (FAILED); | |
1197 | } | |
1198 | if ((scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX)) == NULL) { | |
94d0e7b8 | 1199 | ahd_unlock(ahd, &s); |
1da177e4 LT |
1200 | kfree(recovery_cmd); |
1201 | return (FAILED); | |
1202 | } | |
1203 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, | |
1204 | cmd->device->id, &tstate); | |
1205 | recovery_cmd->result = CAM_REQ_INPROG << 16; | |
1206 | recovery_cmd->host_scribble = (char *)scb; | |
1207 | scb->io_ctx = recovery_cmd; | |
1208 | scb->platform_data->dev = dev; | |
1209 | scb->sg_count = 0; | |
1210 | ahd_set_residual(scb, 0); | |
1211 | ahd_set_sense_residual(scb, 0); | |
1212 | hscb = scb->hscb; | |
1213 | hscb->control = 0; | |
1214 | hscb->scsiid = BUILD_SCSIID(ahd, cmd); | |
1215 | hscb->lun = cmd->device->lun; | |
1216 | hscb->cdb_len = 0; | |
1217 | hscb->task_management = SIU_TASKMGMT_LUN_RESET; | |
1218 | scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; | |
1219 | if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { | |
1220 | scb->flags |= SCB_PACKETIZED; | |
1221 | } else { | |
1222 | hscb->control |= MK_MESSAGE; | |
1223 | } | |
1224 | dev->openings--; | |
1225 | dev->active++; | |
1226 | dev->commands_issued++; | |
1227 | LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); | |
1228 | ahd_queue_scb(ahd, scb); | |
1229 | ||
1230 | scb->platform_data->flags |= AHD_SCB_UP_EH_SEM; | |
cc33895a | 1231 | ahd_unlock(ahd, &s); |
1da177e4 LT |
1232 | init_timer(&timer); |
1233 | timer.data = (u_long)scb; | |
1234 | timer.expires = jiffies + (5 * HZ); | |
1235 | timer.function = ahd_linux_sem_timeout; | |
1236 | add_timer(&timer); | |
1237 | printf("Recovery code sleeping\n"); | |
1238 | down(&ahd->platform_data->eh_sem); | |
1239 | printf("Recovery code awake\n"); | |
1240 | retval = SUCCESS; | |
1241 | if (del_timer_sync(&timer) == 0) { | |
1242 | printf("Timer Expired\n"); | |
1243 | retval = FAILED; | |
1244 | } | |
cc33895a | 1245 | ahd_lock(ahd, &s); |
1da177e4 | 1246 | ahd_linux_run_complete_queue(ahd); |
94d0e7b8 | 1247 | ahd_unlock(ahd, &s); |
1da177e4 LT |
1248 | printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); |
1249 | return (retval); | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * Reset the SCSI bus. | |
1254 | */ | |
1255 | static int | |
1256 | ahd_linux_bus_reset(Scsi_Cmnd *cmd) | |
1257 | { | |
1258 | struct ahd_softc *ahd; | |
1259 | u_long s; | |
1260 | int found; | |
1261 | ||
1262 | ahd = *(struct ahd_softc **)cmd->device->host->hostdata; | |
1263 | #ifdef AHD_DEBUG | |
1264 | if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) | |
1265 | printf("%s: Bus reset called for cmd %p\n", | |
1266 | ahd_name(ahd), cmd); | |
1267 | #endif | |
68b3aa7c | 1268 | ahd_lock(ahd, &s); |
1da177e4 LT |
1269 | found = ahd_reset_channel(ahd, cmd->device->channel + 'A', |
1270 | /*initiate reset*/TRUE); | |
1271 | ahd_linux_run_complete_queue(ahd); | |
68b3aa7c | 1272 | ahd_unlock(ahd, &s); |
1da177e4 LT |
1273 | |
1274 | if (bootverbose) | |
1275 | printf("%s: SCSI bus reset delivered. " | |
1276 | "%d SCBs aborted.\n", ahd_name(ahd), found); | |
1277 | ||
1278 | return (SUCCESS); | |
1279 | } | |
1280 | ||
1281 | Scsi_Host_Template aic79xx_driver_template = { | |
1282 | .module = THIS_MODULE, | |
1283 | .name = "aic79xx", | |
1284 | .proc_info = ahd_linux_proc_info, | |
1285 | .info = ahd_linux_info, | |
1286 | .queuecommand = ahd_linux_queue, | |
1287 | .eh_abort_handler = ahd_linux_abort, | |
1288 | .eh_device_reset_handler = ahd_linux_dev_reset, | |
1289 | .eh_bus_reset_handler = ahd_linux_bus_reset, | |
1290 | #if defined(__i386__) | |
1291 | .bios_param = ahd_linux_biosparam, | |
1292 | #endif | |
1293 | .can_queue = AHD_MAX_QUEUE, | |
1294 | .this_id = -1, | |
1295 | .cmd_per_lun = 2, | |
1296 | .use_clustering = ENABLE_CLUSTERING, | |
1297 | .slave_alloc = ahd_linux_slave_alloc, | |
1298 | .slave_configure = ahd_linux_slave_configure, | |
1299 | .slave_destroy = ahd_linux_slave_destroy, | |
1300 | }; | |
1301 | ||
1da177e4 LT |
1302 | /******************************** Bus DMA *************************************/ |
1303 | int | |
1304 | ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, | |
1305 | bus_size_t alignment, bus_size_t boundary, | |
1306 | dma_addr_t lowaddr, dma_addr_t highaddr, | |
1307 | bus_dma_filter_t *filter, void *filterarg, | |
1308 | bus_size_t maxsize, int nsegments, | |
1309 | bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) | |
1310 | { | |
1311 | bus_dma_tag_t dmat; | |
1312 | ||
1313 | dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); | |
1314 | if (dmat == NULL) | |
1315 | return (ENOMEM); | |
1316 | ||
1317 | /* | |
1318 | * Linux is very simplistic about DMA memory. For now don't | |
1319 | * maintain all specification information. Once Linux supplies | |
1320 | * better facilities for doing these operations, or the | |
1321 | * needs of this particular driver change, we might need to do | |
1322 | * more here. | |
1323 | */ | |
1324 | dmat->alignment = alignment; | |
1325 | dmat->boundary = boundary; | |
1326 | dmat->maxsize = maxsize; | |
1327 | *ret_tag = dmat; | |
1328 | return (0); | |
1329 | } | |
1330 | ||
1331 | void | |
1332 | ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) | |
1333 | { | |
1334 | free(dmat, M_DEVBUF); | |
1335 | } | |
1336 | ||
1337 | int | |
1338 | ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, | |
1339 | int flags, bus_dmamap_t *mapp) | |
1340 | { | |
1341 | bus_dmamap_t map; | |
1342 | ||
1343 | map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT); | |
1344 | if (map == NULL) | |
1345 | return (ENOMEM); | |
1346 | /* | |
1347 | * Although we can dma data above 4GB, our | |
1348 | * "consistent" memory is below 4GB for | |
1349 | * space efficiency reasons (only need a 4byte | |
1350 | * address). For this reason, we have to reset | |
1351 | * our dma mask when doing allocations. | |
1352 | */ | |
1353 | if (ahd->dev_softc != NULL) | |
1354 | if (pci_set_dma_mask(ahd->dev_softc, 0xFFFFFFFF)) { | |
1355 | printk(KERN_WARNING "aic79xx: No suitable DMA available.\n"); | |
1356 | kfree(map); | |
1357 | return (ENODEV); | |
1358 | } | |
1359 | *vaddr = pci_alloc_consistent(ahd->dev_softc, | |
1360 | dmat->maxsize, &map->bus_addr); | |
1361 | if (ahd->dev_softc != NULL) | |
1362 | if (pci_set_dma_mask(ahd->dev_softc, | |
1363 | ahd->platform_data->hw_dma_mask)) { | |
1364 | printk(KERN_WARNING "aic79xx: No suitable DMA available.\n"); | |
1365 | kfree(map); | |
1366 | return (ENODEV); | |
1367 | } | |
1368 | if (*vaddr == NULL) | |
1369 | return (ENOMEM); | |
1370 | *mapp = map; | |
1371 | return(0); | |
1372 | } | |
1373 | ||
1374 | void | |
1375 | ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, | |
1376 | void* vaddr, bus_dmamap_t map) | |
1377 | { | |
1378 | pci_free_consistent(ahd->dev_softc, dmat->maxsize, | |
1379 | vaddr, map->bus_addr); | |
1380 | } | |
1381 | ||
1382 | int | |
1383 | ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, | |
1384 | void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, | |
1385 | void *cb_arg, int flags) | |
1386 | { | |
1387 | /* | |
1388 | * Assume for now that this will only be used during | |
1389 | * initialization and not for per-transaction buffer mapping. | |
1390 | */ | |
1391 | bus_dma_segment_t stack_sg; | |
1392 | ||
1393 | stack_sg.ds_addr = map->bus_addr; | |
1394 | stack_sg.ds_len = dmat->maxsize; | |
1395 | cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); | |
1396 | return (0); | |
1397 | } | |
1398 | ||
1399 | void | |
1400 | ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) | |
1401 | { | |
1402 | /* | |
1403 | * The map may is NULL in our < 2.3.X implementation. | |
1404 | */ | |
1405 | if (map != NULL) | |
1406 | free(map, M_DEVBUF); | |
1407 | } | |
1408 | ||
1409 | int | |
1410 | ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) | |
1411 | { | |
1412 | /* Nothing to do */ | |
1413 | return (0); | |
1414 | } | |
1415 | ||
1416 | /********************* Platform Dependent Functions ***************************/ | |
1417 | /* | |
1418 | * Compare "left hand" softc with "right hand" softc, returning: | |
1419 | * < 0 - lahd has a lower priority than rahd | |
1420 | * 0 - Softcs are equal | |
1421 | * > 0 - lahd has a higher priority than rahd | |
1422 | */ | |
1423 | int | |
1424 | ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd) | |
1425 | { | |
1426 | int value; | |
1427 | ||
1428 | /* | |
1429 | * Under Linux, cards are ordered as follows: | |
1430 | * 1) PCI devices that are marked as the boot controller. | |
1431 | * 2) PCI devices with BIOS enabled sorted by bus/slot/func. | |
1432 | * 3) All remaining PCI devices sorted by bus/slot/func. | |
1433 | */ | |
1434 | #if 0 | |
1435 | value = (lahd->flags & AHD_BOOT_CHANNEL) | |
1436 | - (rahd->flags & AHD_BOOT_CHANNEL); | |
1437 | if (value != 0) | |
1438 | /* Controllers set for boot have a *higher* priority */ | |
1439 | return (value); | |
1440 | #endif | |
1441 | ||
1442 | value = (lahd->flags & AHD_BIOS_ENABLED) | |
1443 | - (rahd->flags & AHD_BIOS_ENABLED); | |
1444 | if (value != 0) | |
1445 | /* Controllers with BIOS enabled have a *higher* priority */ | |
1446 | return (value); | |
1447 | ||
1448 | /* Still equal. Sort by bus/slot/func. */ | |
1449 | if (aic79xx_reverse_scan != 0) | |
1450 | value = ahd_get_pci_bus(lahd->dev_softc) | |
1451 | - ahd_get_pci_bus(rahd->dev_softc); | |
1452 | else | |
1453 | value = ahd_get_pci_bus(rahd->dev_softc) | |
1454 | - ahd_get_pci_bus(lahd->dev_softc); | |
1455 | if (value != 0) | |
1456 | return (value); | |
1457 | if (aic79xx_reverse_scan != 0) | |
1458 | value = ahd_get_pci_slot(lahd->dev_softc) | |
1459 | - ahd_get_pci_slot(rahd->dev_softc); | |
1460 | else | |
1461 | value = ahd_get_pci_slot(rahd->dev_softc) | |
1462 | - ahd_get_pci_slot(lahd->dev_softc); | |
1463 | if (value != 0) | |
1464 | return (value); | |
1465 | ||
1466 | value = rahd->channel - lahd->channel; | |
1467 | return (value); | |
1468 | } | |
1469 | ||
1470 | static void | |
1471 | ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) | |
1472 | { | |
1473 | ||
1474 | if ((instance >= 0) && (targ >= 0) | |
1475 | && (instance < NUM_ELEMENTS(aic79xx_tag_info)) | |
1476 | && (targ < AHD_NUM_TARGETS)) { | |
1477 | aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; | |
1478 | if (bootverbose) | |
1479 | printf("tag_info[%d:%d] = %d\n", instance, targ, value); | |
1480 | } | |
1481 | } | |
1482 | ||
1483 | static void | |
1484 | ahd_linux_setup_rd_strm_info(u_long arg, int instance, int targ, int32_t value) | |
1485 | { | |
1486 | if ((instance >= 0) | |
1487 | && (instance < NUM_ELEMENTS(aic79xx_rd_strm_info))) { | |
1488 | aic79xx_rd_strm_info[instance] = value & 0xFFFF; | |
1489 | if (bootverbose) | |
1490 | printf("rd_strm[%d] = 0x%x\n", instance, value); | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | static void | |
1495 | ahd_linux_setup_dv(u_long arg, int instance, int targ, int32_t value) | |
1496 | { | |
1497 | if ((instance >= 0) | |
1498 | && (instance < NUM_ELEMENTS(aic79xx_dv_settings))) { | |
1499 | aic79xx_dv_settings[instance] = value; | |
1500 | if (bootverbose) | |
1501 | printf("dv[%d] = %d\n", instance, value); | |
1502 | } | |
1503 | } | |
1504 | ||
1505 | static void | |
1506 | ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) | |
1507 | { | |
1508 | ||
1509 | if ((instance >= 0) | |
1510 | && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) { | |
1511 | uint8_t *iocell_info; | |
1512 | ||
1513 | iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; | |
1514 | iocell_info[index] = value & 0xFFFF; | |
1515 | if (bootverbose) | |
1516 | printf("iocell[%d:%ld] = %d\n", instance, index, value); | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | static void | |
1521 | ahd_linux_setup_tag_info_global(char *p) | |
1522 | { | |
1523 | int tags, i, j; | |
1524 | ||
1525 | tags = simple_strtoul(p + 1, NULL, 0) & 0xff; | |
1526 | printf("Setting Global Tags= %d\n", tags); | |
1527 | ||
1528 | for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) { | |
1529 | for (j = 0; j < AHD_NUM_TARGETS; j++) { | |
1530 | aic79xx_tag_info[i].tag_commands[j] = tags; | |
1531 | } | |
1532 | } | |
1533 | } | |
1534 | ||
1535 | /* | |
1536 | * Handle Linux boot parameters. This routine allows for assigning a value | |
1537 | * to a parameter with a ':' between the parameter and the value. | |
1538 | * ie. aic79xx=stpwlev:1,extended | |
1539 | */ | |
1540 | static int | |
1541 | aic79xx_setup(char *s) | |
1542 | { | |
1543 | int i, n; | |
1544 | char *p; | |
1545 | char *end; | |
1546 | ||
1547 | static struct { | |
1548 | const char *name; | |
1549 | uint32_t *flag; | |
1550 | } options[] = { | |
1551 | { "extended", &aic79xx_extended }, | |
1552 | { "no_reset", &aic79xx_no_reset }, | |
1553 | { "verbose", &aic79xx_verbose }, | |
1554 | { "allow_memio", &aic79xx_allow_memio}, | |
1555 | #ifdef AHD_DEBUG | |
1556 | { "debug", &ahd_debug }, | |
1557 | #endif | |
1558 | { "reverse_scan", &aic79xx_reverse_scan }, | |
1559 | { "periodic_otag", &aic79xx_periodic_otag }, | |
1560 | { "pci_parity", &aic79xx_pci_parity }, | |
1561 | { "seltime", &aic79xx_seltime }, | |
1562 | { "tag_info", NULL }, | |
1563 | { "global_tag_depth", NULL}, | |
1564 | { "rd_strm", NULL }, | |
1565 | { "dv", NULL }, | |
1566 | { "slewrate", NULL }, | |
1567 | { "precomp", NULL }, | |
1568 | { "amplitude", NULL }, | |
1569 | }; | |
1570 | ||
1571 | end = strchr(s, '\0'); | |
1572 | ||
1573 | /* | |
1574 | * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS | |
1575 | * will never be 0 in this case. | |
1576 | */ | |
1577 | n = 0; | |
1578 | ||
1579 | while ((p = strsep(&s, ",.")) != NULL) { | |
1580 | if (*p == '\0') | |
1581 | continue; | |
1582 | for (i = 0; i < NUM_ELEMENTS(options); i++) { | |
1583 | ||
1584 | n = strlen(options[i].name); | |
1585 | if (strncmp(options[i].name, p, n) == 0) | |
1586 | break; | |
1587 | } | |
1588 | if (i == NUM_ELEMENTS(options)) | |
1589 | continue; | |
1590 | ||
1591 | if (strncmp(p, "global_tag_depth", n) == 0) { | |
1592 | ahd_linux_setup_tag_info_global(p + n); | |
1593 | } else if (strncmp(p, "tag_info", n) == 0) { | |
1594 | s = aic_parse_brace_option("tag_info", p + n, end, | |
1595 | 2, ahd_linux_setup_tag_info, 0); | |
1596 | } else if (strncmp(p, "rd_strm", n) == 0) { | |
1597 | s = aic_parse_brace_option("rd_strm", p + n, end, | |
1598 | 1, ahd_linux_setup_rd_strm_info, 0); | |
1599 | } else if (strncmp(p, "dv", n) == 0) { | |
1600 | s = aic_parse_brace_option("dv", p + n, end, 1, | |
1601 | ahd_linux_setup_dv, 0); | |
1602 | } else if (strncmp(p, "slewrate", n) == 0) { | |
1603 | s = aic_parse_brace_option("slewrate", | |
1604 | p + n, end, 1, ahd_linux_setup_iocell_info, | |
1605 | AIC79XX_SLEWRATE_INDEX); | |
1606 | } else if (strncmp(p, "precomp", n) == 0) { | |
1607 | s = aic_parse_brace_option("precomp", | |
1608 | p + n, end, 1, ahd_linux_setup_iocell_info, | |
1609 | AIC79XX_PRECOMP_INDEX); | |
1610 | } else if (strncmp(p, "amplitude", n) == 0) { | |
1611 | s = aic_parse_brace_option("amplitude", | |
1612 | p + n, end, 1, ahd_linux_setup_iocell_info, | |
1613 | AIC79XX_AMPLITUDE_INDEX); | |
1614 | } else if (p[n] == ':') { | |
1615 | *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); | |
1616 | } else if (!strncmp(p, "verbose", n)) { | |
1617 | *(options[i].flag) = 1; | |
1618 | } else { | |
1619 | *(options[i].flag) ^= 0xFFFFFFFF; | |
1620 | } | |
1621 | } | |
1622 | return 1; | |
1623 | } | |
1624 | ||
1625 | __setup("aic79xx=", aic79xx_setup); | |
1626 | ||
1627 | uint32_t aic79xx_verbose; | |
1628 | ||
1629 | int | |
1630 | ahd_linux_register_host(struct ahd_softc *ahd, Scsi_Host_Template *template) | |
1631 | { | |
1632 | char buf[80]; | |
1633 | struct Scsi_Host *host; | |
1634 | char *new_name; | |
1635 | u_long s; | |
1636 | u_long target; | |
1637 | ||
1638 | template->name = ahd->description; | |
1639 | host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); | |
1640 | if (host == NULL) | |
1641 | return (ENOMEM); | |
1642 | ||
1643 | *((struct ahd_softc **)host->hostdata) = ahd; | |
1644 | ahd_lock(ahd, &s); | |
1da177e4 | 1645 | scsi_assign_lock(host, &ahd->platform_data->spin_lock); |
1da177e4 LT |
1646 | ahd->platform_data->host = host; |
1647 | host->can_queue = AHD_MAX_QUEUE; | |
1648 | host->cmd_per_lun = 2; | |
1649 | host->sg_tablesize = AHD_NSEG; | |
1650 | host->this_id = ahd->our_id; | |
1651 | host->irq = ahd->platform_data->irq; | |
1652 | host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; | |
1653 | host->max_lun = AHD_NUM_LUNS; | |
1654 | host->max_channel = 0; | |
1655 | host->sg_tablesize = AHD_NSEG; | |
1656 | ahd_set_unit(ahd, ahd_linux_next_unit()); | |
1657 | sprintf(buf, "scsi%d", host->host_no); | |
1658 | new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); | |
1659 | if (new_name != NULL) { | |
1660 | strcpy(new_name, buf); | |
1661 | ahd_set_name(ahd, new_name); | |
1662 | } | |
1663 | host->unique_id = ahd->unit; | |
1da177e4 LT |
1664 | ahd_linux_setup_user_rd_strm_settings(ahd); |
1665 | ahd_linux_initialize_scsi_bus(ahd); | |
1666 | ahd_unlock(ahd, &s); | |
1667 | ahd->platform_data->dv_pid = kernel_thread(ahd_linux_dv_thread, ahd, 0); | |
1668 | ahd_lock(ahd, &s); | |
1669 | if (ahd->platform_data->dv_pid < 0) { | |
1670 | printf("%s: Failed to create DV thread, error= %d\n", | |
1671 | ahd_name(ahd), ahd->platform_data->dv_pid); | |
1672 | return (-ahd->platform_data->dv_pid); | |
1673 | } | |
1674 | /* | |
1675 | * Initially allocate *all* of our linux target objects | |
1676 | * so that the DV thread will scan them all in parallel | |
1677 | * just after driver initialization. Any device that | |
1678 | * does not exist will have its target object destroyed | |
1679 | * by the selection timeout handler. In the case of a | |
1680 | * device that appears after the initial DV scan, async | |
1681 | * negotiation will occur for the first command, and DV | |
1682 | * will comence should that first command be successful. | |
1683 | */ | |
1684 | for (target = 0; target < host->max_id; target++) { | |
1685 | ||
1686 | /* | |
1687 | * Skip our own ID. Some Compaq/HP storage devices | |
1688 | * have enclosure management devices that respond to | |
1689 | * single bit selection (i.e. selecting ourselves). | |
1690 | * It is expected that either an external application | |
1691 | * or a modified kernel will be used to probe this | |
1692 | * ID if it is appropriate. To accommodate these | |
1693 | * installations, ahc_linux_alloc_target() will allocate | |
1694 | * for our ID if asked to do so. | |
1695 | */ | |
1696 | if (target == ahd->our_id) | |
1697 | continue; | |
1698 | ||
1699 | ahd_linux_alloc_target(ahd, 0, target); | |
1700 | } | |
1701 | ahd_intr_enable(ahd, TRUE); | |
1702 | ahd_linux_start_dv(ahd); | |
1703 | ahd_unlock(ahd, &s); | |
1704 | ||
1da177e4 LT |
1705 | scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */ |
1706 | scsi_scan_host(host); | |
1da177e4 LT |
1707 | return (0); |
1708 | } | |
1709 | ||
1710 | uint64_t | |
1711 | ahd_linux_get_memsize(void) | |
1712 | { | |
1713 | struct sysinfo si; | |
1714 | ||
1715 | si_meminfo(&si); | |
1716 | return ((uint64_t)si.totalram << PAGE_SHIFT); | |
1717 | } | |
1718 | ||
1719 | /* | |
1720 | * Find the smallest available unit number to use | |
1721 | * for a new device. We don't just use a static | |
1722 | * count to handle the "repeated hot-(un)plug" | |
1723 | * scenario. | |
1724 | */ | |
1725 | static int | |
1726 | ahd_linux_next_unit(void) | |
1727 | { | |
1728 | struct ahd_softc *ahd; | |
1729 | int unit; | |
1730 | ||
1731 | unit = 0; | |
1732 | retry: | |
1733 | TAILQ_FOREACH(ahd, &ahd_tailq, links) { | |
1734 | if (ahd->unit == unit) { | |
1735 | unit++; | |
1736 | goto retry; | |
1737 | } | |
1738 | } | |
1739 | return (unit); | |
1740 | } | |
1741 | ||
1742 | /* | |
1743 | * Place the SCSI bus into a known state by either resetting it, | |
1744 | * or forcing transfer negotiations on the next command to any | |
1745 | * target. | |
1746 | */ | |
1747 | static void | |
1748 | ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) | |
1749 | { | |
1750 | u_int target_id; | |
1751 | u_int numtarg; | |
1752 | ||
1753 | target_id = 0; | |
1754 | numtarg = 0; | |
1755 | ||
1756 | if (aic79xx_no_reset != 0) | |
1757 | ahd->flags &= ~AHD_RESET_BUS_A; | |
1758 | ||
1759 | if ((ahd->flags & AHD_RESET_BUS_A) != 0) | |
1760 | ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); | |
1761 | else | |
1762 | numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; | |
1763 | ||
1764 | /* | |
1765 | * Force negotiation to async for all targets that | |
1766 | * will not see an initial bus reset. | |
1767 | */ | |
1768 | for (; target_id < numtarg; target_id++) { | |
1769 | struct ahd_devinfo devinfo; | |
1770 | struct ahd_initiator_tinfo *tinfo; | |
1771 | struct ahd_tmode_tstate *tstate; | |
1772 | ||
1773 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, | |
1774 | target_id, &tstate); | |
1775 | ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, | |
1776 | CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); | |
1777 | ahd_update_neg_request(ahd, &devinfo, tstate, | |
1778 | tinfo, AHD_NEG_ALWAYS); | |
1779 | } | |
1780 | /* Give the bus some time to recover */ | |
1781 | if ((ahd->flags & AHD_RESET_BUS_A) != 0) { | |
1782 | ahd_freeze_simq(ahd); | |
1783 | init_timer(&ahd->platform_data->reset_timer); | |
1784 | ahd->platform_data->reset_timer.data = (u_long)ahd; | |
1785 | ahd->platform_data->reset_timer.expires = | |
1786 | jiffies + (AIC79XX_RESET_DELAY * HZ)/1000; | |
1787 | ahd->platform_data->reset_timer.function = | |
1788 | (ahd_linux_callback_t *)ahd_release_simq; | |
1789 | add_timer(&ahd->platform_data->reset_timer); | |
1790 | } | |
1791 | } | |
1792 | ||
1793 | int | |
1794 | ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) | |
1795 | { | |
1796 | ahd->platform_data = | |
1797 | malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT); | |
1798 | if (ahd->platform_data == NULL) | |
1799 | return (ENOMEM); | |
1800 | memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); | |
1801 | TAILQ_INIT(&ahd->platform_data->completeq); | |
1da177e4 LT |
1802 | ahd->platform_data->irq = AHD_LINUX_NOIRQ; |
1803 | ahd->platform_data->hw_dma_mask = 0xFFFFFFFF; | |
1804 | ahd_lockinit(ahd); | |
1805 | ahd_done_lockinit(ahd); | |
1806 | init_timer(&ahd->platform_data->completeq_timer); | |
1807 | ahd->platform_data->completeq_timer.data = (u_long)ahd; | |
1808 | ahd->platform_data->completeq_timer.function = | |
1809 | (ahd_linux_callback_t *)ahd_linux_thread_run_complete_queue; | |
1810 | init_MUTEX_LOCKED(&ahd->platform_data->eh_sem); | |
1811 | init_MUTEX_LOCKED(&ahd->platform_data->dv_sem); | |
1812 | init_MUTEX_LOCKED(&ahd->platform_data->dv_cmd_sem); | |
1da177e4 LT |
1813 | ahd->seltime = (aic79xx_seltime & 0x3) << 4; |
1814 | return (0); | |
1815 | } | |
1816 | ||
1817 | void | |
1818 | ahd_platform_free(struct ahd_softc *ahd) | |
1819 | { | |
1820 | struct ahd_linux_target *targ; | |
1821 | struct ahd_linux_device *dev; | |
1822 | int i, j; | |
1823 | ||
1824 | if (ahd->platform_data != NULL) { | |
1825 | del_timer_sync(&ahd->platform_data->completeq_timer); | |
1826 | ahd_linux_kill_dv_thread(ahd); | |
1da177e4 | 1827 | if (ahd->platform_data->host != NULL) { |
1da177e4 | 1828 | scsi_remove_host(ahd->platform_data->host); |
1da177e4 LT |
1829 | scsi_host_put(ahd->platform_data->host); |
1830 | } | |
1831 | ||
1832 | /* destroy all of the device and target objects */ | |
1833 | for (i = 0; i < AHD_NUM_TARGETS; i++) { | |
1834 | targ = ahd->platform_data->targets[i]; | |
1835 | if (targ != NULL) { | |
1836 | /* Keep target around through the loop. */ | |
1837 | targ->refcount++; | |
1838 | for (j = 0; j < AHD_NUM_LUNS; j++) { | |
1839 | ||
1840 | if (targ->devices[j] == NULL) | |
1841 | continue; | |
1842 | dev = targ->devices[j]; | |
1843 | ahd_linux_free_device(ahd, dev); | |
1844 | } | |
1845 | /* | |
1846 | * Forcibly free the target now that | |
1847 | * all devices are gone. | |
1848 | */ | |
1849 | ahd_linux_free_target(ahd, targ); | |
1850 | } | |
1851 | } | |
1852 | ||
1853 | if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) | |
1854 | free_irq(ahd->platform_data->irq, ahd); | |
1855 | if (ahd->tags[0] == BUS_SPACE_PIO | |
1856 | && ahd->bshs[0].ioport != 0) | |
1857 | release_region(ahd->bshs[0].ioport, 256); | |
1858 | if (ahd->tags[1] == BUS_SPACE_PIO | |
1859 | && ahd->bshs[1].ioport != 0) | |
1860 | release_region(ahd->bshs[1].ioport, 256); | |
1861 | if (ahd->tags[0] == BUS_SPACE_MEMIO | |
1862 | && ahd->bshs[0].maddr != NULL) { | |
1863 | iounmap(ahd->bshs[0].maddr); | |
1864 | release_mem_region(ahd->platform_data->mem_busaddr, | |
1865 | 0x1000); | |
1866 | } | |
1da177e4 LT |
1867 | free(ahd->platform_data, M_DEVBUF); |
1868 | } | |
1869 | } | |
1870 | ||
1871 | void | |
1872 | ahd_platform_init(struct ahd_softc *ahd) | |
1873 | { | |
1874 | /* | |
1875 | * Lookup and commit any modified IO Cell options. | |
1876 | */ | |
1877 | if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) { | |
1878 | struct ahd_linux_iocell_opts *iocell_opts; | |
1879 | ||
1880 | iocell_opts = &aic79xx_iocell_info[ahd->unit]; | |
1881 | if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) | |
1882 | AHD_SET_PRECOMP(ahd, iocell_opts->precomp); | |
1883 | if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) | |
1884 | AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); | |
1885 | if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) | |
1886 | AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); | |
1887 | } | |
1888 | ||
1889 | } | |
1890 | ||
1891 | void | |
1892 | ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) | |
1893 | { | |
1894 | ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), | |
1895 | SCB_GET_CHANNEL(ahd, scb), | |
1896 | SCB_GET_LUN(scb), SCB_LIST_NULL, | |
1897 | ROLE_UNKNOWN, CAM_REQUEUE_REQ); | |
1898 | } | |
1899 | ||
1900 | void | |
1901 | ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, | |
1902 | ahd_queue_alg alg) | |
1903 | { | |
1904 | struct ahd_linux_device *dev; | |
1905 | int was_queuing; | |
1906 | int now_queuing; | |
1907 | ||
1908 | dev = ahd_linux_get_device(ahd, devinfo->channel - 'A', | |
1909 | devinfo->target, | |
1910 | devinfo->lun, /*alloc*/FALSE); | |
1911 | if (dev == NULL) | |
1912 | return; | |
1913 | was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); | |
1914 | switch (alg) { | |
1915 | default: | |
1916 | case AHD_QUEUE_NONE: | |
1917 | now_queuing = 0; | |
1918 | break; | |
1919 | case AHD_QUEUE_BASIC: | |
1920 | now_queuing = AHD_DEV_Q_BASIC; | |
1921 | break; | |
1922 | case AHD_QUEUE_TAGGED: | |
1923 | now_queuing = AHD_DEV_Q_TAGGED; | |
1924 | break; | |
1925 | } | |
1926 | if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 | |
1927 | && (was_queuing != now_queuing) | |
1928 | && (dev->active != 0)) { | |
1929 | dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; | |
1930 | dev->qfrozen++; | |
1931 | } | |
1932 | ||
1933 | dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); | |
1934 | if (now_queuing) { | |
1935 | u_int usertags; | |
1936 | ||
1937 | usertags = ahd_linux_user_tagdepth(ahd, devinfo); | |
1938 | if (!was_queuing) { | |
1939 | /* | |
1940 | * Start out agressively and allow our | |
1941 | * dynamic queue depth algorithm to take | |
1942 | * care of the rest. | |
1943 | */ | |
1944 | dev->maxtags = usertags; | |
1945 | dev->openings = dev->maxtags - dev->active; | |
1946 | } | |
1947 | if (dev->maxtags == 0) { | |
1948 | /* | |
1949 | * Queueing is disabled by the user. | |
1950 | */ | |
1951 | dev->openings = 1; | |
1952 | } else if (alg == AHD_QUEUE_TAGGED) { | |
1953 | dev->flags |= AHD_DEV_Q_TAGGED; | |
1954 | if (aic79xx_periodic_otag != 0) | |
1955 | dev->flags |= AHD_DEV_PERIODIC_OTAG; | |
1956 | } else | |
1957 | dev->flags |= AHD_DEV_Q_BASIC; | |
1958 | } else { | |
1959 | /* We can only have one opening. */ | |
1960 | dev->maxtags = 0; | |
1961 | dev->openings = 1 - dev->active; | |
1962 | } | |
60a13213 | 1963 | |
1da177e4 LT |
1964 | if (dev->scsi_device != NULL) { |
1965 | switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { | |
1966 | case AHD_DEV_Q_BASIC: | |
1967 | scsi_adjust_queue_depth(dev->scsi_device, | |
1968 | MSG_SIMPLE_TASK, | |
1969 | dev->openings + dev->active); | |
1970 | break; | |
1971 | case AHD_DEV_Q_TAGGED: | |
1972 | scsi_adjust_queue_depth(dev->scsi_device, | |
1973 | MSG_ORDERED_TASK, | |
1974 | dev->openings + dev->active); | |
1975 | break; | |
1976 | default: | |
1977 | /* | |
1978 | * We allow the OS to queue 2 untagged transactions to | |
1979 | * us at any time even though we can only execute them | |
1980 | * serially on the controller/device. This should | |
1981 | * remove some latency. | |
1982 | */ | |
1983 | scsi_adjust_queue_depth(dev->scsi_device, | |
1984 | /*NON-TAGGED*/0, | |
1985 | /*queue depth*/2); | |
1986 | break; | |
1987 | } | |
1988 | } | |
1da177e4 LT |
1989 | } |
1990 | ||
1991 | int | |
1992 | ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, | |
1993 | int lun, u_int tag, role_t role, uint32_t status) | |
1994 | { | |
60a13213 | 1995 | return 0; |
1da177e4 LT |
1996 | } |
1997 | ||
1998 | static void | |
1999 | ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd) | |
2000 | { | |
2001 | u_long flags; | |
2002 | ||
2003 | ahd_lock(ahd, &flags); | |
2004 | del_timer(&ahd->platform_data->completeq_timer); | |
2005 | ahd->platform_data->flags &= ~AHD_RUN_CMPLT_Q_TIMER; | |
2006 | ahd_linux_run_complete_queue(ahd); | |
2007 | ahd_unlock(ahd, &flags); | |
2008 | } | |
2009 | ||
2010 | static void | |
2011 | ahd_linux_start_dv(struct ahd_softc *ahd) | |
2012 | { | |
2013 | ||
2014 | /* | |
2015 | * Freeze the simq and signal ahd_linux_queue to not let any | |
2016 | * more commands through | |
2017 | */ | |
2018 | if ((ahd->platform_data->flags & AHD_DV_ACTIVE) == 0) { | |
2019 | #ifdef AHD_DEBUG | |
2020 | if (ahd_debug & AHD_SHOW_DV) | |
2021 | printf("%s: Starting DV\n", ahd_name(ahd)); | |
2022 | #endif | |
2023 | ||
2024 | ahd->platform_data->flags |= AHD_DV_ACTIVE; | |
2025 | ahd_freeze_simq(ahd); | |
2026 | ||
2027 | /* Wake up the DV kthread */ | |
2028 | up(&ahd->platform_data->dv_sem); | |
2029 | } | |
2030 | } | |
2031 | ||
2032 | static int | |
2033 | ahd_linux_dv_thread(void *data) | |
2034 | { | |
2035 | struct ahd_softc *ahd; | |
2036 | int target; | |
2037 | u_long s; | |
2038 | ||
2039 | ahd = (struct ahd_softc *)data; | |
2040 | ||
2041 | #ifdef AHD_DEBUG | |
2042 | if (ahd_debug & AHD_SHOW_DV) | |
2043 | printf("In DV Thread\n"); | |
2044 | #endif | |
2045 | ||
2046 | /* | |
2047 | * Complete thread creation. | |
2048 | */ | |
2049 | lock_kernel(); | |
1da177e4 | 2050 | |
1da177e4 | 2051 | daemonize("ahd_dv_%d", ahd->unit); |
60a13213 HR |
2052 | current->flags |= PF_FREEZE; |
2053 | ||
1da177e4 LT |
2054 | unlock_kernel(); |
2055 | ||
2056 | while (1) { | |
2057 | /* | |
2058 | * Use down_interruptible() rather than down() to | |
2059 | * avoid inclusion in the load average. | |
2060 | */ | |
2061 | down_interruptible(&ahd->platform_data->dv_sem); | |
2062 | ||
2063 | /* Check to see if we've been signaled to exit */ | |
2064 | ahd_lock(ahd, &s); | |
2065 | if ((ahd->platform_data->flags & AHD_DV_SHUTDOWN) != 0) { | |
2066 | ahd_unlock(ahd, &s); | |
2067 | break; | |
2068 | } | |
2069 | ahd_unlock(ahd, &s); | |
2070 | ||
2071 | #ifdef AHD_DEBUG | |
2072 | if (ahd_debug & AHD_SHOW_DV) | |
2073 | printf("%s: Beginning Domain Validation\n", | |
2074 | ahd_name(ahd)); | |
2075 | #endif | |
2076 | ||
2077 | /* | |
2078 | * Wait for any pending commands to drain before proceeding. | |
2079 | */ | |
2080 | ahd_lock(ahd, &s); | |
2081 | while (LIST_FIRST(&ahd->pending_scbs) != NULL) { | |
2082 | ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_EMPTY; | |
2083 | ahd_unlock(ahd, &s); | |
2084 | down_interruptible(&ahd->platform_data->dv_sem); | |
2085 | ahd_lock(ahd, &s); | |
2086 | } | |
2087 | ||
2088 | /* | |
2089 | * Wait for the SIMQ to be released so that DV is the | |
2090 | * only reason the queue is frozen. | |
2091 | */ | |
2092 | while (AHD_DV_SIMQ_FROZEN(ahd) == 0) { | |
2093 | ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE; | |
2094 | ahd_unlock(ahd, &s); | |
2095 | down_interruptible(&ahd->platform_data->dv_sem); | |
2096 | ahd_lock(ahd, &s); | |
2097 | } | |
2098 | ahd_unlock(ahd, &s); | |
2099 | ||
2100 | for (target = 0; target < AHD_NUM_TARGETS; target++) | |
2101 | ahd_linux_dv_target(ahd, target); | |
2102 | ||
2103 | ahd_lock(ahd, &s); | |
2104 | ahd->platform_data->flags &= ~AHD_DV_ACTIVE; | |
2105 | ahd_unlock(ahd, &s); | |
2106 | ||
2107 | /* | |
2108 | * Release the SIMQ so that normal commands are | |
2109 | * allowed to continue on the bus. | |
2110 | */ | |
2111 | ahd_release_simq(ahd); | |
2112 | } | |
2113 | up(&ahd->platform_data->eh_sem); | |
2114 | return (0); | |
2115 | } | |
2116 | ||
2117 | static void | |
2118 | ahd_linux_kill_dv_thread(struct ahd_softc *ahd) | |
2119 | { | |
2120 | u_long s; | |
2121 | ||
2122 | ahd_lock(ahd, &s); | |
2123 | if (ahd->platform_data->dv_pid != 0) { | |
2124 | ahd->platform_data->flags |= AHD_DV_SHUTDOWN; | |
2125 | ahd_unlock(ahd, &s); | |
2126 | up(&ahd->platform_data->dv_sem); | |
2127 | ||
2128 | /* | |
2129 | * Use the eh_sem as an indicator that the | |
2130 | * dv thread is exiting. Note that the dv | |
2131 | * thread must still return after performing | |
2132 | * the up on our semaphore before it has | |
2133 | * completely exited this module. Unfortunately, | |
2134 | * there seems to be no easy way to wait for the | |
2135 | * exit of a thread for which you are not the | |
2136 | * parent (dv threads are parented by init). | |
2137 | * Cross your fingers... | |
2138 | */ | |
2139 | down(&ahd->platform_data->eh_sem); | |
2140 | ||
2141 | /* | |
2142 | * Mark the dv thread as already dead. This | |
2143 | * avoids attempting to kill it a second time. | |
2144 | * This is necessary because we must kill the | |
2145 | * DV thread before calling ahd_free() in the | |
2146 | * module shutdown case to avoid bogus locking | |
2147 | * in the SCSI mid-layer, but we ahd_free() is | |
2148 | * called without killing the DV thread in the | |
2149 | * instance detach case, so ahd_platform_free() | |
2150 | * calls us again to verify that the DV thread | |
2151 | * is dead. | |
2152 | */ | |
2153 | ahd->platform_data->dv_pid = 0; | |
2154 | } else { | |
2155 | ahd_unlock(ahd, &s); | |
2156 | } | |
2157 | } | |
2158 | ||
2159 | #define AHD_LINUX_DV_INQ_SHORT_LEN 36 | |
2160 | #define AHD_LINUX_DV_INQ_LEN 256 | |
2161 | #define AHD_LINUX_DV_TIMEOUT (HZ / 4) | |
2162 | ||
2163 | #define AHD_SET_DV_STATE(ahd, targ, newstate) \ | |
2164 | ahd_set_dv_state(ahd, targ, newstate, __LINE__) | |
2165 | ||
2166 | static __inline void | |
2167 | ahd_set_dv_state(struct ahd_softc *ahd, struct ahd_linux_target *targ, | |
2168 | ahd_dv_state newstate, u_int line) | |
2169 | { | |
2170 | ahd_dv_state oldstate; | |
2171 | ||
2172 | oldstate = targ->dv_state; | |
2173 | #ifdef AHD_DEBUG | |
2174 | if (ahd_debug & AHD_SHOW_DV) | |
2175 | printf("%s:%d: Going from state %d to state %d\n", | |
2176 | ahd_name(ahd), line, oldstate, newstate); | |
2177 | #endif | |
2178 | ||
2179 | if (oldstate == newstate) | |
2180 | targ->dv_state_retry++; | |
2181 | else | |
2182 | targ->dv_state_retry = 0; | |
2183 | targ->dv_state = newstate; | |
2184 | } | |
2185 | ||
2186 | static void | |
2187 | ahd_linux_dv_target(struct ahd_softc *ahd, u_int target_offset) | |
2188 | { | |
2189 | struct ahd_devinfo devinfo; | |
2190 | struct ahd_linux_target *targ; | |
2191 | struct scsi_cmnd *cmd; | |
2192 | struct scsi_device *scsi_dev; | |
2193 | struct scsi_sense_data *sense; | |
2194 | uint8_t *buffer; | |
2195 | u_long s; | |
2196 | u_int timeout; | |
2197 | int echo_size; | |
2198 | ||
2199 | sense = NULL; | |
2200 | buffer = NULL; | |
2201 | echo_size = 0; | |
2202 | ahd_lock(ahd, &s); | |
2203 | targ = ahd->platform_data->targets[target_offset]; | |
2204 | if (targ == NULL || (targ->flags & AHD_DV_REQUIRED) == 0) { | |
2205 | ahd_unlock(ahd, &s); | |
2206 | return; | |
2207 | } | |
2208 | ahd_compile_devinfo(&devinfo, ahd->our_id, targ->target, /*lun*/0, | |
2209 | targ->channel + 'A', ROLE_INITIATOR); | |
2210 | #ifdef AHD_DEBUG | |
2211 | if (ahd_debug & AHD_SHOW_DV) { | |
2212 | ahd_print_devinfo(ahd, &devinfo); | |
2213 | printf("Performing DV\n"); | |
2214 | } | |
2215 | #endif | |
2216 | ||
2217 | ahd_unlock(ahd, &s); | |
2218 | ||
2219 | cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK); | |
2220 | scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK); | |
2221 | scsi_dev->host = ahd->platform_data->host; | |
2222 | scsi_dev->id = devinfo.target; | |
2223 | scsi_dev->lun = devinfo.lun; | |
2224 | scsi_dev->channel = devinfo.channel - 'A'; | |
2225 | ahd->platform_data->dv_scsi_dev = scsi_dev; | |
2226 | ||
2227 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2228 | ||
2229 | while (targ->dv_state != AHD_DV_STATE_EXIT) { | |
2230 | timeout = AHD_LINUX_DV_TIMEOUT; | |
2231 | switch (targ->dv_state) { | |
2232 | case AHD_DV_STATE_INQ_SHORT_ASYNC: | |
2233 | case AHD_DV_STATE_INQ_ASYNC: | |
2234 | case AHD_DV_STATE_INQ_ASYNC_VERIFY: | |
2235 | /* | |
2236 | * Set things to async narrow to reduce the | |
2237 | * chance that the INQ will fail. | |
2238 | */ | |
2239 | ahd_lock(ahd, &s); | |
2240 | ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, | |
2241 | AHD_TRANS_GOAL, /*paused*/FALSE); | |
2242 | ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, | |
2243 | AHD_TRANS_GOAL, /*paused*/FALSE); | |
2244 | ahd_unlock(ahd, &s); | |
2245 | timeout = 10 * HZ; | |
2246 | targ->flags &= ~AHD_INQ_VALID; | |
2247 | /* FALLTHROUGH */ | |
2248 | case AHD_DV_STATE_INQ_VERIFY: | |
2249 | { | |
2250 | u_int inq_len; | |
2251 | ||
2252 | if (targ->dv_state == AHD_DV_STATE_INQ_SHORT_ASYNC) | |
2253 | inq_len = AHD_LINUX_DV_INQ_SHORT_LEN; | |
2254 | else | |
2255 | inq_len = targ->inq_data->additional_length + 5; | |
2256 | ahd_linux_dv_inq(ahd, cmd, &devinfo, targ, inq_len); | |
2257 | break; | |
2258 | } | |
2259 | case AHD_DV_STATE_TUR: | |
2260 | case AHD_DV_STATE_BUSY: | |
2261 | timeout = 5 * HZ; | |
2262 | ahd_linux_dv_tur(ahd, cmd, &devinfo); | |
2263 | break; | |
2264 | case AHD_DV_STATE_REBD: | |
2265 | ahd_linux_dv_rebd(ahd, cmd, &devinfo, targ); | |
2266 | break; | |
2267 | case AHD_DV_STATE_WEB: | |
2268 | ahd_linux_dv_web(ahd, cmd, &devinfo, targ); | |
2269 | break; | |
2270 | ||
2271 | case AHD_DV_STATE_REB: | |
2272 | ahd_linux_dv_reb(ahd, cmd, &devinfo, targ); | |
2273 | break; | |
2274 | ||
2275 | case AHD_DV_STATE_SU: | |
2276 | ahd_linux_dv_su(ahd, cmd, &devinfo, targ); | |
2277 | timeout = 50 * HZ; | |
2278 | break; | |
2279 | ||
2280 | default: | |
2281 | ahd_print_devinfo(ahd, &devinfo); | |
2282 | printf("Unknown DV state %d\n", targ->dv_state); | |
2283 | goto out; | |
2284 | } | |
2285 | ||
2286 | /* Queue the command and wait for it to complete */ | |
2287 | /* Abuse eh_timeout in the scsi_cmnd struct for our purposes */ | |
2288 | init_timer(&cmd->eh_timeout); | |
2289 | #ifdef AHD_DEBUG | |
2290 | if ((ahd_debug & AHD_SHOW_MESSAGES) != 0) | |
2291 | /* | |
2292 | * All of the printfs during negotiation | |
2293 | * really slow down the negotiation. | |
2294 | * Add a bit of time just to be safe. | |
2295 | */ | |
2296 | timeout += HZ; | |
2297 | #endif | |
2298 | scsi_add_timer(cmd, timeout, ahd_linux_dv_timeout); | |
2299 | /* | |
2300 | * In 2.5.X, it is assumed that all calls from the | |
2301 | * "midlayer" (which we are emulating) will have the | |
2302 | * ahd host lock held. For other kernels, the | |
2303 | * io_request_lock must be held. | |
2304 | */ | |
2305 | #if AHD_SCSI_HAS_HOST_LOCK != 0 | |
2306 | ahd_lock(ahd, &s); | |
2307 | #else | |
2308 | spin_lock_irqsave(&io_request_lock, s); | |
2309 | #endif | |
2310 | ahd_linux_queue(cmd, ahd_linux_dv_complete); | |
2311 | #if AHD_SCSI_HAS_HOST_LOCK != 0 | |
2312 | ahd_unlock(ahd, &s); | |
2313 | #else | |
2314 | spin_unlock_irqrestore(&io_request_lock, s); | |
2315 | #endif | |
2316 | down_interruptible(&ahd->platform_data->dv_cmd_sem); | |
2317 | /* | |
2318 | * Wait for the SIMQ to be released so that DV is the | |
2319 | * only reason the queue is frozen. | |
2320 | */ | |
2321 | ahd_lock(ahd, &s); | |
2322 | while (AHD_DV_SIMQ_FROZEN(ahd) == 0) { | |
2323 | ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE; | |
2324 | ahd_unlock(ahd, &s); | |
2325 | down_interruptible(&ahd->platform_data->dv_sem); | |
2326 | ahd_lock(ahd, &s); | |
2327 | } | |
2328 | ahd_unlock(ahd, &s); | |
2329 | ||
2330 | ahd_linux_dv_transition(ahd, cmd, &devinfo, targ); | |
2331 | } | |
2332 | ||
2333 | out: | |
2334 | if ((targ->flags & AHD_INQ_VALID) != 0 | |
2335 | && ahd_linux_get_device(ahd, devinfo.channel - 'A', | |
2336 | devinfo.target, devinfo.lun, | |
2337 | /*alloc*/FALSE) == NULL) { | |
2338 | /* | |
2339 | * The DV state machine failed to configure this device. | |
2340 | * This is normal if DV is disabled. Since we have inquiry | |
2341 | * data, filter it and use the "optimistic" negotiation | |
2342 | * parameters found in the inquiry string. | |
2343 | */ | |
2344 | ahd_linux_filter_inquiry(ahd, &devinfo); | |
2345 | if ((targ->flags & (AHD_BASIC_DV|AHD_ENHANCED_DV)) != 0) { | |
2346 | ahd_print_devinfo(ahd, &devinfo); | |
2347 | printf("DV failed to configure device. " | |
2348 | "Please file a bug report against " | |
2349 | "this driver.\n"); | |
2350 | } | |
2351 | } | |
2352 | ||
2353 | if (cmd != NULL) | |
2354 | free(cmd, M_DEVBUF); | |
2355 | ||
2356 | if (ahd->platform_data->dv_scsi_dev != NULL) { | |
2357 | free(ahd->platform_data->dv_scsi_dev, M_DEVBUF); | |
2358 | ahd->platform_data->dv_scsi_dev = NULL; | |
2359 | } | |
2360 | ||
2361 | ahd_lock(ahd, &s); | |
2362 | if (targ->dv_buffer != NULL) { | |
2363 | free(targ->dv_buffer, M_DEVBUF); | |
2364 | targ->dv_buffer = NULL; | |
2365 | } | |
2366 | if (targ->dv_buffer1 != NULL) { | |
2367 | free(targ->dv_buffer1, M_DEVBUF); | |
2368 | targ->dv_buffer1 = NULL; | |
2369 | } | |
2370 | targ->flags &= ~AHD_DV_REQUIRED; | |
2371 | if (targ->refcount == 0) | |
2372 | ahd_linux_free_target(ahd, targ); | |
2373 | ahd_unlock(ahd, &s); | |
2374 | } | |
2375 | ||
2376 | static __inline int | |
2377 | ahd_linux_dv_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) | |
2378 | { | |
2379 | u_long s; | |
2380 | int retval; | |
2381 | ||
2382 | ahd_lock(ahd, &s); | |
2383 | retval = ahd_linux_fallback(ahd, devinfo); | |
2384 | ahd_unlock(ahd, &s); | |
2385 | ||
2386 | return (retval); | |
2387 | } | |
2388 | ||
2389 | static void | |
2390 | ahd_linux_dv_transition(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
2391 | struct ahd_devinfo *devinfo, | |
2392 | struct ahd_linux_target *targ) | |
2393 | { | |
2394 | u_int32_t status; | |
2395 | ||
2396 | status = aic_error_action(cmd, targ->inq_data, | |
2397 | ahd_cmd_get_transaction_status(cmd), | |
2398 | ahd_cmd_get_scsi_status(cmd)); | |
2399 | ||
2400 | ||
2401 | #ifdef AHD_DEBUG | |
2402 | if (ahd_debug & AHD_SHOW_DV) { | |
2403 | ahd_print_devinfo(ahd, devinfo); | |
2404 | printf("Entering ahd_linux_dv_transition, state= %d, " | |
2405 | "status= 0x%x, cmd->result= 0x%x\n", targ->dv_state, | |
2406 | status, cmd->result); | |
2407 | } | |
2408 | #endif | |
2409 | ||
2410 | switch (targ->dv_state) { | |
2411 | case AHD_DV_STATE_INQ_SHORT_ASYNC: | |
2412 | case AHD_DV_STATE_INQ_ASYNC: | |
2413 | switch (status & SS_MASK) { | |
2414 | case SS_NOP: | |
2415 | { | |
2416 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1); | |
2417 | break; | |
2418 | } | |
2419 | case SS_INQ_REFRESH: | |
2420 | AHD_SET_DV_STATE(ahd, targ, | |
2421 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2422 | break; | |
2423 | case SS_TUR: | |
2424 | case SS_RETRY: | |
2425 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2426 | if (ahd_cmd_get_transaction_status(cmd) | |
2427 | == CAM_REQUEUE_REQ) | |
2428 | targ->dv_state_retry--; | |
2429 | if ((status & SS_ERRMASK) == EBUSY) | |
2430 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); | |
2431 | if (targ->dv_state_retry < 10) | |
2432 | break; | |
2433 | /* FALLTHROUGH */ | |
2434 | default: | |
2435 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2436 | #ifdef AHD_DEBUG | |
2437 | if (ahd_debug & AHD_SHOW_DV) { | |
2438 | ahd_print_devinfo(ahd, devinfo); | |
2439 | printf("Failed DV inquiry, skipping\n"); | |
2440 | } | |
2441 | #endif | |
2442 | break; | |
2443 | } | |
2444 | break; | |
2445 | case AHD_DV_STATE_INQ_ASYNC_VERIFY: | |
2446 | switch (status & SS_MASK) { | |
2447 | case SS_NOP: | |
2448 | { | |
2449 | u_int xportflags; | |
2450 | u_int spi3data; | |
2451 | ||
2452 | if (memcmp(targ->inq_data, targ->dv_buffer, | |
2453 | AHD_LINUX_DV_INQ_LEN) != 0) { | |
2454 | /* | |
2455 | * Inquiry data must have changed. | |
2456 | * Try from the top again. | |
2457 | */ | |
2458 | AHD_SET_DV_STATE(ahd, targ, | |
2459 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2460 | break; | |
2461 | } | |
2462 | ||
2463 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1); | |
2464 | targ->flags |= AHD_INQ_VALID; | |
2465 | if (ahd_linux_user_dv_setting(ahd) == 0) | |
2466 | break; | |
2467 | ||
2468 | xportflags = targ->inq_data->flags; | |
2469 | if ((xportflags & (SID_Sync|SID_WBus16)) == 0) | |
2470 | break; | |
2471 | ||
2472 | spi3data = targ->inq_data->spi3data; | |
2473 | switch (spi3data & SID_SPI_CLOCK_DT_ST) { | |
2474 | default: | |
2475 | case SID_SPI_CLOCK_ST: | |
2476 | /* Assume only basic DV is supported. */ | |
2477 | targ->flags |= AHD_BASIC_DV; | |
2478 | break; | |
2479 | case SID_SPI_CLOCK_DT: | |
2480 | case SID_SPI_CLOCK_DT_ST: | |
2481 | targ->flags |= AHD_ENHANCED_DV; | |
2482 | break; | |
2483 | } | |
2484 | break; | |
2485 | } | |
2486 | case SS_INQ_REFRESH: | |
2487 | AHD_SET_DV_STATE(ahd, targ, | |
2488 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2489 | break; | |
2490 | case SS_TUR: | |
2491 | case SS_RETRY: | |
2492 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2493 | if (ahd_cmd_get_transaction_status(cmd) | |
2494 | == CAM_REQUEUE_REQ) | |
2495 | targ->dv_state_retry--; | |
2496 | ||
2497 | if ((status & SS_ERRMASK) == EBUSY) | |
2498 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); | |
2499 | if (targ->dv_state_retry < 10) | |
2500 | break; | |
2501 | /* FALLTHROUGH */ | |
2502 | default: | |
2503 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2504 | #ifdef AHD_DEBUG | |
2505 | if (ahd_debug & AHD_SHOW_DV) { | |
2506 | ahd_print_devinfo(ahd, devinfo); | |
2507 | printf("Failed DV inquiry, skipping\n"); | |
2508 | } | |
2509 | #endif | |
2510 | break; | |
2511 | } | |
2512 | break; | |
2513 | case AHD_DV_STATE_INQ_VERIFY: | |
2514 | switch (status & SS_MASK) { | |
2515 | case SS_NOP: | |
2516 | { | |
2517 | ||
2518 | if (memcmp(targ->inq_data, targ->dv_buffer, | |
2519 | AHD_LINUX_DV_INQ_LEN) == 0) { | |
2520 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2521 | break; | |
2522 | } | |
2523 | ||
2524 | #ifdef AHD_DEBUG | |
2525 | if (ahd_debug & AHD_SHOW_DV) { | |
2526 | int i; | |
2527 | ||
2528 | ahd_print_devinfo(ahd, devinfo); | |
2529 | printf("Inquiry buffer mismatch:"); | |
2530 | for (i = 0; i < AHD_LINUX_DV_INQ_LEN; i++) { | |
2531 | if ((i & 0xF) == 0) | |
2532 | printf("\n "); | |
2533 | printf("0x%x:0x0%x ", | |
2534 | ((uint8_t *)targ->inq_data)[i], | |
2535 | targ->dv_buffer[i]); | |
2536 | } | |
2537 | printf("\n"); | |
2538 | } | |
2539 | #endif | |
2540 | ||
2541 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { | |
2542 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2543 | break; | |
2544 | } | |
2545 | /* | |
2546 | * Do not count "falling back" | |
2547 | * against our retries. | |
2548 | */ | |
2549 | targ->dv_state_retry = 0; | |
2550 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2551 | break; | |
2552 | } | |
2553 | case SS_INQ_REFRESH: | |
2554 | AHD_SET_DV_STATE(ahd, targ, | |
2555 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2556 | break; | |
2557 | case SS_TUR: | |
2558 | case SS_RETRY: | |
2559 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2560 | if (ahd_cmd_get_transaction_status(cmd) | |
2561 | == CAM_REQUEUE_REQ) { | |
2562 | targ->dv_state_retry--; | |
2563 | } else if ((status & SSQ_FALLBACK) != 0) { | |
2564 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { | |
2565 | AHD_SET_DV_STATE(ahd, targ, | |
2566 | AHD_DV_STATE_EXIT); | |
2567 | break; | |
2568 | } | |
2569 | /* | |
2570 | * Do not count "falling back" | |
2571 | * against our retries. | |
2572 | */ | |
2573 | targ->dv_state_retry = 0; | |
2574 | } else if ((status & SS_ERRMASK) == EBUSY) | |
2575 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); | |
2576 | if (targ->dv_state_retry < 10) | |
2577 | break; | |
2578 | /* FALLTHROUGH */ | |
2579 | default: | |
2580 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2581 | #ifdef AHD_DEBUG | |
2582 | if (ahd_debug & AHD_SHOW_DV) { | |
2583 | ahd_print_devinfo(ahd, devinfo); | |
2584 | printf("Failed DV inquiry, skipping\n"); | |
2585 | } | |
2586 | #endif | |
2587 | break; | |
2588 | } | |
2589 | break; | |
2590 | ||
2591 | case AHD_DV_STATE_TUR: | |
2592 | switch (status & SS_MASK) { | |
2593 | case SS_NOP: | |
2594 | if ((targ->flags & AHD_BASIC_DV) != 0) { | |
2595 | ahd_linux_filter_inquiry(ahd, devinfo); | |
2596 | AHD_SET_DV_STATE(ahd, targ, | |
2597 | AHD_DV_STATE_INQ_VERIFY); | |
2598 | } else if ((targ->flags & AHD_ENHANCED_DV) != 0) { | |
2599 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REBD); | |
2600 | } else { | |
2601 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2602 | } | |
2603 | break; | |
2604 | case SS_RETRY: | |
2605 | case SS_TUR: | |
2606 | if ((status & SS_ERRMASK) == EBUSY) { | |
2607 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY); | |
2608 | break; | |
2609 | } | |
2610 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2611 | if (ahd_cmd_get_transaction_status(cmd) | |
2612 | == CAM_REQUEUE_REQ) { | |
2613 | targ->dv_state_retry--; | |
2614 | } else if ((status & SSQ_FALLBACK) != 0) { | |
2615 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { | |
2616 | AHD_SET_DV_STATE(ahd, targ, | |
2617 | AHD_DV_STATE_EXIT); | |
2618 | break; | |
2619 | } | |
2620 | /* | |
2621 | * Do not count "falling back" | |
2622 | * against our retries. | |
2623 | */ | |
2624 | targ->dv_state_retry = 0; | |
2625 | } | |
2626 | if (targ->dv_state_retry >= 10) { | |
2627 | #ifdef AHD_DEBUG | |
2628 | if (ahd_debug & AHD_SHOW_DV) { | |
2629 | ahd_print_devinfo(ahd, devinfo); | |
2630 | printf("DV TUR reties exhausted\n"); | |
2631 | } | |
2632 | #endif | |
2633 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2634 | break; | |
2635 | } | |
2636 | if (status & SSQ_DELAY) | |
2637 | ssleep(1); | |
2638 | ||
2639 | break; | |
2640 | case SS_START: | |
2641 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_SU); | |
2642 | break; | |
2643 | case SS_INQ_REFRESH: | |
2644 | AHD_SET_DV_STATE(ahd, targ, | |
2645 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2646 | break; | |
2647 | default: | |
2648 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2649 | break; | |
2650 | } | |
2651 | break; | |
2652 | ||
2653 | case AHD_DV_STATE_REBD: | |
2654 | switch (status & SS_MASK) { | |
2655 | case SS_NOP: | |
2656 | { | |
2657 | uint32_t echo_size; | |
2658 | ||
2659 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB); | |
2660 | echo_size = scsi_3btoul(&targ->dv_buffer[1]); | |
2661 | echo_size &= 0x1FFF; | |
2662 | #ifdef AHD_DEBUG | |
2663 | if (ahd_debug & AHD_SHOW_DV) { | |
2664 | ahd_print_devinfo(ahd, devinfo); | |
2665 | printf("Echo buffer size= %d\n", echo_size); | |
2666 | } | |
2667 | #endif | |
2668 | if (echo_size == 0) { | |
2669 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2670 | break; | |
2671 | } | |
2672 | ||
2673 | /* Generate the buffer pattern */ | |
2674 | targ->dv_echo_size = echo_size; | |
2675 | ahd_linux_generate_dv_pattern(targ); | |
2676 | /* | |
2677 | * Setup initial negotiation values. | |
2678 | */ | |
2679 | ahd_linux_filter_inquiry(ahd, devinfo); | |
2680 | break; | |
2681 | } | |
2682 | case SS_INQ_REFRESH: | |
2683 | AHD_SET_DV_STATE(ahd, targ, | |
2684 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2685 | break; | |
2686 | case SS_RETRY: | |
2687 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2688 | if (ahd_cmd_get_transaction_status(cmd) | |
2689 | == CAM_REQUEUE_REQ) | |
2690 | targ->dv_state_retry--; | |
2691 | if (targ->dv_state_retry <= 10) | |
2692 | break; | |
2693 | #ifdef AHD_DEBUG | |
2694 | if (ahd_debug & AHD_SHOW_DV) { | |
2695 | ahd_print_devinfo(ahd, devinfo); | |
2696 | printf("DV REBD reties exhausted\n"); | |
2697 | } | |
2698 | #endif | |
2699 | /* FALLTHROUGH */ | |
2700 | case SS_FATAL: | |
2701 | default: | |
2702 | /* | |
2703 | * Setup initial negotiation values | |
2704 | * and try level 1 DV. | |
2705 | */ | |
2706 | ahd_linux_filter_inquiry(ahd, devinfo); | |
2707 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_VERIFY); | |
2708 | targ->dv_echo_size = 0; | |
2709 | break; | |
2710 | } | |
2711 | break; | |
2712 | ||
2713 | case AHD_DV_STATE_WEB: | |
2714 | switch (status & SS_MASK) { | |
2715 | case SS_NOP: | |
2716 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REB); | |
2717 | break; | |
2718 | case SS_INQ_REFRESH: | |
2719 | AHD_SET_DV_STATE(ahd, targ, | |
2720 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2721 | break; | |
2722 | case SS_RETRY: | |
2723 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2724 | if (ahd_cmd_get_transaction_status(cmd) | |
2725 | == CAM_REQUEUE_REQ) { | |
2726 | targ->dv_state_retry--; | |
2727 | } else if ((status & SSQ_FALLBACK) != 0) { | |
2728 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { | |
2729 | AHD_SET_DV_STATE(ahd, targ, | |
2730 | AHD_DV_STATE_EXIT); | |
2731 | break; | |
2732 | } | |
2733 | /* | |
2734 | * Do not count "falling back" | |
2735 | * against our retries. | |
2736 | */ | |
2737 | targ->dv_state_retry = 0; | |
2738 | } | |
2739 | if (targ->dv_state_retry <= 10) | |
2740 | break; | |
2741 | /* FALLTHROUGH */ | |
2742 | #ifdef AHD_DEBUG | |
2743 | if (ahd_debug & AHD_SHOW_DV) { | |
2744 | ahd_print_devinfo(ahd, devinfo); | |
2745 | printf("DV WEB reties exhausted\n"); | |
2746 | } | |
2747 | #endif | |
2748 | default: | |
2749 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2750 | break; | |
2751 | } | |
2752 | break; | |
2753 | ||
2754 | case AHD_DV_STATE_REB: | |
2755 | switch (status & SS_MASK) { | |
2756 | case SS_NOP: | |
2757 | if (memcmp(targ->dv_buffer, targ->dv_buffer1, | |
2758 | targ->dv_echo_size) != 0) { | |
2759 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) | |
2760 | AHD_SET_DV_STATE(ahd, targ, | |
2761 | AHD_DV_STATE_EXIT); | |
2762 | else | |
2763 | AHD_SET_DV_STATE(ahd, targ, | |
2764 | AHD_DV_STATE_WEB); | |
2765 | break; | |
2766 | } | |
2767 | ||
2768 | if (targ->dv_buffer != NULL) { | |
2769 | free(targ->dv_buffer, M_DEVBUF); | |
2770 | targ->dv_buffer = NULL; | |
2771 | } | |
2772 | if (targ->dv_buffer1 != NULL) { | |
2773 | free(targ->dv_buffer1, M_DEVBUF); | |
2774 | targ->dv_buffer1 = NULL; | |
2775 | } | |
2776 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2777 | break; | |
2778 | case SS_INQ_REFRESH: | |
2779 | AHD_SET_DV_STATE(ahd, targ, | |
2780 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2781 | break; | |
2782 | case SS_RETRY: | |
2783 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2784 | if (ahd_cmd_get_transaction_status(cmd) | |
2785 | == CAM_REQUEUE_REQ) { | |
2786 | targ->dv_state_retry--; | |
2787 | } else if ((status & SSQ_FALLBACK) != 0) { | |
2788 | if (ahd_linux_dv_fallback(ahd, devinfo) != 0) { | |
2789 | AHD_SET_DV_STATE(ahd, targ, | |
2790 | AHD_DV_STATE_EXIT); | |
2791 | break; | |
2792 | } | |
2793 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB); | |
2794 | } | |
2795 | if (targ->dv_state_retry <= 10) { | |
2796 | if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0) | |
2797 | msleep(ahd->our_id*1000/10); | |
2798 | break; | |
2799 | } | |
2800 | #ifdef AHD_DEBUG | |
2801 | if (ahd_debug & AHD_SHOW_DV) { | |
2802 | ahd_print_devinfo(ahd, devinfo); | |
2803 | printf("DV REB reties exhausted\n"); | |
2804 | } | |
2805 | #endif | |
2806 | /* FALLTHROUGH */ | |
2807 | default: | |
2808 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2809 | break; | |
2810 | } | |
2811 | break; | |
2812 | ||
2813 | case AHD_DV_STATE_SU: | |
2814 | switch (status & SS_MASK) { | |
2815 | case SS_NOP: | |
2816 | case SS_INQ_REFRESH: | |
2817 | AHD_SET_DV_STATE(ahd, targ, | |
2818 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2819 | break; | |
2820 | default: | |
2821 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2822 | break; | |
2823 | } | |
2824 | break; | |
2825 | ||
2826 | case AHD_DV_STATE_BUSY: | |
2827 | switch (status & SS_MASK) { | |
2828 | case SS_NOP: | |
2829 | case SS_INQ_REFRESH: | |
2830 | AHD_SET_DV_STATE(ahd, targ, | |
2831 | AHD_DV_STATE_INQ_SHORT_ASYNC); | |
2832 | break; | |
2833 | case SS_TUR: | |
2834 | case SS_RETRY: | |
2835 | AHD_SET_DV_STATE(ahd, targ, targ->dv_state); | |
2836 | if (ahd_cmd_get_transaction_status(cmd) | |
2837 | == CAM_REQUEUE_REQ) { | |
2838 | targ->dv_state_retry--; | |
2839 | } else if (targ->dv_state_retry < 60) { | |
2840 | if ((status & SSQ_DELAY) != 0) | |
2841 | ssleep(1); | |
2842 | } else { | |
2843 | #ifdef AHD_DEBUG | |
2844 | if (ahd_debug & AHD_SHOW_DV) { | |
2845 | ahd_print_devinfo(ahd, devinfo); | |
2846 | printf("DV BUSY reties exhausted\n"); | |
2847 | } | |
2848 | #endif | |
2849 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2850 | } | |
2851 | break; | |
2852 | default: | |
2853 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2854 | break; | |
2855 | } | |
2856 | break; | |
2857 | ||
2858 | default: | |
2859 | printf("%s: Invalid DV completion state %d\n", ahd_name(ahd), | |
2860 | targ->dv_state); | |
2861 | AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT); | |
2862 | break; | |
2863 | } | |
2864 | } | |
2865 | ||
2866 | static void | |
2867 | ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
2868 | struct ahd_devinfo *devinfo) | |
2869 | { | |
2870 | memset(cmd, 0, sizeof(struct scsi_cmnd)); | |
2871 | cmd->device = ahd->platform_data->dv_scsi_dev; | |
2872 | cmd->scsi_done = ahd_linux_dv_complete; | |
2873 | } | |
2874 | ||
2875 | /* | |
2876 | * Synthesize an inquiry command. On the return trip, it'll be | |
2877 | * sniffed and the device transfer settings set for us. | |
2878 | */ | |
2879 | static void | |
2880 | ahd_linux_dv_inq(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
2881 | struct ahd_devinfo *devinfo, struct ahd_linux_target *targ, | |
2882 | u_int request_length) | |
2883 | { | |
2884 | ||
2885 | #ifdef AHD_DEBUG | |
2886 | if (ahd_debug & AHD_SHOW_DV) { | |
2887 | ahd_print_devinfo(ahd, devinfo); | |
2888 | printf("Sending INQ\n"); | |
2889 | } | |
2890 | #endif | |
2891 | if (targ->inq_data == NULL) | |
2892 | targ->inq_data = malloc(AHD_LINUX_DV_INQ_LEN, | |
2893 | M_DEVBUF, M_WAITOK); | |
2894 | if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) { | |
2895 | if (targ->dv_buffer != NULL) | |
2896 | free(targ->dv_buffer, M_DEVBUF); | |
2897 | targ->dv_buffer = malloc(AHD_LINUX_DV_INQ_LEN, | |
2898 | M_DEVBUF, M_WAITOK); | |
2899 | } | |
2900 | ||
2901 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 2902 | cmd->sc_data_direction = DMA_FROM_DEVICE; |
1da177e4 LT |
2903 | cmd->cmd_len = 6; |
2904 | cmd->cmnd[0] = INQUIRY; | |
2905 | cmd->cmnd[4] = request_length; | |
2906 | cmd->request_bufflen = request_length; | |
2907 | if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) | |
2908 | cmd->request_buffer = targ->dv_buffer; | |
2909 | else | |
2910 | cmd->request_buffer = targ->inq_data; | |
2911 | memset(cmd->request_buffer, 0, AHD_LINUX_DV_INQ_LEN); | |
2912 | } | |
2913 | ||
2914 | static void | |
2915 | ahd_linux_dv_tur(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
2916 | struct ahd_devinfo *devinfo) | |
2917 | { | |
2918 | ||
2919 | #ifdef AHD_DEBUG | |
2920 | if (ahd_debug & AHD_SHOW_DV) { | |
2921 | ahd_print_devinfo(ahd, devinfo); | |
2922 | printf("Sending TUR\n"); | |
2923 | } | |
2924 | #endif | |
2925 | /* Do a TUR to clear out any non-fatal transitional state */ | |
2926 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 2927 | cmd->sc_data_direction = DMA_NONE; |
1da177e4 LT |
2928 | cmd->cmd_len = 6; |
2929 | cmd->cmnd[0] = TEST_UNIT_READY; | |
2930 | } | |
2931 | ||
2932 | #define AHD_REBD_LEN 4 | |
2933 | ||
2934 | static void | |
2935 | ahd_linux_dv_rebd(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
2936 | struct ahd_devinfo *devinfo, struct ahd_linux_target *targ) | |
2937 | { | |
2938 | ||
2939 | #ifdef AHD_DEBUG | |
2940 | if (ahd_debug & AHD_SHOW_DV) { | |
2941 | ahd_print_devinfo(ahd, devinfo); | |
2942 | printf("Sending REBD\n"); | |
2943 | } | |
2944 | #endif | |
2945 | if (targ->dv_buffer != NULL) | |
2946 | free(targ->dv_buffer, M_DEVBUF); | |
2947 | targ->dv_buffer = malloc(AHD_REBD_LEN, M_DEVBUF, M_WAITOK); | |
2948 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 2949 | cmd->sc_data_direction = DMA_FROM_DEVICE; |
1da177e4 LT |
2950 | cmd->cmd_len = 10; |
2951 | cmd->cmnd[0] = READ_BUFFER; | |
2952 | cmd->cmnd[1] = 0x0b; | |
2953 | scsi_ulto3b(AHD_REBD_LEN, &cmd->cmnd[6]); | |
2954 | cmd->request_bufflen = AHD_REBD_LEN; | |
2955 | cmd->underflow = cmd->request_bufflen; | |
2956 | cmd->request_buffer = targ->dv_buffer; | |
2957 | } | |
2958 | ||
2959 | static void | |
2960 | ahd_linux_dv_web(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
2961 | struct ahd_devinfo *devinfo, struct ahd_linux_target *targ) | |
2962 | { | |
2963 | ||
2964 | #ifdef AHD_DEBUG | |
2965 | if (ahd_debug & AHD_SHOW_DV) { | |
2966 | ahd_print_devinfo(ahd, devinfo); | |
2967 | printf("Sending WEB\n"); | |
2968 | } | |
2969 | #endif | |
2970 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 2971 | cmd->sc_data_direction = DMA_TO_DEVICE; |
1da177e4 LT |
2972 | cmd->cmd_len = 10; |
2973 | cmd->cmnd[0] = WRITE_BUFFER; | |
2974 | cmd->cmnd[1] = 0x0a; | |
2975 | scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]); | |
2976 | cmd->request_bufflen = targ->dv_echo_size; | |
2977 | cmd->underflow = cmd->request_bufflen; | |
2978 | cmd->request_buffer = targ->dv_buffer; | |
2979 | } | |
2980 | ||
2981 | static void | |
2982 | ahd_linux_dv_reb(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
2983 | struct ahd_devinfo *devinfo, struct ahd_linux_target *targ) | |
2984 | { | |
2985 | ||
2986 | #ifdef AHD_DEBUG | |
2987 | if (ahd_debug & AHD_SHOW_DV) { | |
2988 | ahd_print_devinfo(ahd, devinfo); | |
2989 | printf("Sending REB\n"); | |
2990 | } | |
2991 | #endif | |
2992 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 2993 | cmd->sc_data_direction = DMA_FROM_DEVICE; |
1da177e4 LT |
2994 | cmd->cmd_len = 10; |
2995 | cmd->cmnd[0] = READ_BUFFER; | |
2996 | cmd->cmnd[1] = 0x0a; | |
2997 | scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]); | |
2998 | cmd->request_bufflen = targ->dv_echo_size; | |
2999 | cmd->underflow = cmd->request_bufflen; | |
3000 | cmd->request_buffer = targ->dv_buffer1; | |
3001 | } | |
3002 | ||
3003 | static void | |
3004 | ahd_linux_dv_su(struct ahd_softc *ahd, struct scsi_cmnd *cmd, | |
3005 | struct ahd_devinfo *devinfo, | |
3006 | struct ahd_linux_target *targ) | |
3007 | { | |
3008 | u_int le; | |
3009 | ||
3010 | le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0; | |
3011 | ||
3012 | #ifdef AHD_DEBUG | |
3013 | if (ahd_debug & AHD_SHOW_DV) { | |
3014 | ahd_print_devinfo(ahd, devinfo); | |
3015 | printf("Sending SU\n"); | |
3016 | } | |
3017 | #endif | |
3018 | ahd_linux_dv_fill_cmd(ahd, cmd, devinfo); | |
be7db055 | 3019 | cmd->sc_data_direction = DMA_NONE; |
1da177e4 LT |
3020 | cmd->cmd_len = 6; |
3021 | cmd->cmnd[0] = START_STOP_UNIT; | |
3022 | cmd->cmnd[4] = le | SSS_START; | |
3023 | } | |
3024 | ||
3025 | static int | |
3026 | ahd_linux_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) | |
3027 | { | |
3028 | struct ahd_linux_target *targ; | |
3029 | struct ahd_initiator_tinfo *tinfo; | |
3030 | struct ahd_transinfo *goal; | |
3031 | struct ahd_tmode_tstate *tstate; | |
3032 | u_int width; | |
3033 | u_int period; | |
3034 | u_int offset; | |
3035 | u_int ppr_options; | |
3036 | u_int cur_speed; | |
3037 | u_int wide_speed; | |
3038 | u_int narrow_speed; | |
3039 | u_int fallback_speed; | |
3040 | ||
3041 | #ifdef AHD_DEBUG | |
3042 | if (ahd_debug & AHD_SHOW_DV) { | |
3043 | ahd_print_devinfo(ahd, devinfo); | |
3044 | printf("Trying to fallback\n"); | |
3045 | } | |
3046 | #endif | |
3047 | targ = ahd->platform_data->targets[devinfo->target_offset]; | |
3048 | tinfo = ahd_fetch_transinfo(ahd, devinfo->channel, | |
3049 | devinfo->our_scsiid, | |
3050 | devinfo->target, &tstate); | |
3051 | goal = &tinfo->goal; | |
3052 | width = goal->width; | |
3053 | period = goal->period; | |
3054 | offset = goal->offset; | |
3055 | ppr_options = goal->ppr_options; | |
3056 | if (offset == 0) | |
3057 | period = AHD_ASYNC_XFER_PERIOD; | |
3058 | if (targ->dv_next_narrow_period == 0) | |
3059 | targ->dv_next_narrow_period = MAX(period, AHD_SYNCRATE_ULTRA2); | |
3060 | if (targ->dv_next_wide_period == 0) | |
3061 | targ->dv_next_wide_period = period; | |
3062 | if (targ->dv_max_width == 0) | |
3063 | targ->dv_max_width = width; | |
3064 | if (targ->dv_max_ppr_options == 0) | |
3065 | targ->dv_max_ppr_options = ppr_options; | |
3066 | if (targ->dv_last_ppr_options == 0) | |
3067 | targ->dv_last_ppr_options = ppr_options; | |
3068 | ||
3069 | cur_speed = aic_calc_speed(width, period, offset, AHD_SYNCRATE_MIN); | |
3070 | wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT, | |
3071 | targ->dv_next_wide_period, | |
3072 | MAX_OFFSET, AHD_SYNCRATE_MIN); | |
3073 | narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT, | |
3074 | targ->dv_next_narrow_period, | |
3075 | MAX_OFFSET, AHD_SYNCRATE_MIN); | |
3076 | fallback_speed = aic_calc_speed(width, period+1, offset, | |
3077 | AHD_SYNCRATE_MIN); | |
3078 | #ifdef AHD_DEBUG | |
3079 | if (ahd_debug & AHD_SHOW_DV) { | |
3080 | printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, " | |
3081 | "fallback_speed= %d\n", cur_speed, wide_speed, | |
3082 | narrow_speed, fallback_speed); | |
3083 | } | |
3084 | #endif | |
3085 | ||
3086 | if (cur_speed > 160000) { | |
3087 | /* | |
3088 | * Paced/DT/IU_REQ only transfer speeds. All we | |
3089 | * can do is fallback in terms of syncrate. | |
3090 | */ | |
3091 | period++; | |
3092 | } else if (cur_speed > 80000) { | |
3093 | if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { | |
3094 | /* | |
3095 | * Try without IU_REQ as it may be confusing | |
3096 | * an expander. | |
3097 | */ | |
3098 | ppr_options &= ~MSG_EXT_PPR_IU_REQ; | |
3099 | } else { | |
3100 | /* | |
3101 | * Paced/DT only transfer speeds. All we | |
3102 | * can do is fallback in terms of syncrate. | |
3103 | */ | |
3104 | period++; | |
3105 | ppr_options = targ->dv_max_ppr_options; | |
3106 | } | |
3107 | } else if (cur_speed > 3300) { | |
3108 | ||
3109 | /* | |
3110 | * In this range we the following | |
3111 | * options ordered from highest to | |
3112 | * lowest desireability: | |
3113 | * | |
3114 | * o Wide/DT | |
3115 | * o Wide/non-DT | |
3116 | * o Narrow at a potentally higher sync rate. | |
3117 | * | |
3118 | * All modes are tested with and without IU_REQ | |
3119 | * set since using IUs may confuse an expander. | |
3120 | */ | |
3121 | if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { | |
3122 | ||
3123 | ppr_options &= ~MSG_EXT_PPR_IU_REQ; | |
3124 | } else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) { | |
3125 | /* | |
3126 | * Try going non-DT. | |
3127 | */ | |
3128 | ppr_options = targ->dv_max_ppr_options; | |
3129 | ppr_options &= ~MSG_EXT_PPR_DT_REQ; | |
3130 | } else if (targ->dv_last_ppr_options != 0) { | |
3131 | /* | |
3132 | * Try without QAS or any other PPR options. | |
3133 | * We may need a non-PPR message to work with | |
3134 | * an expander. We look at the "last PPR options" | |
3135 | * so we will perform this fallback even if the | |
3136 | * target responded to our PPR negotiation with | |
3137 | * no option bits set. | |
3138 | */ | |
3139 | ppr_options = 0; | |
3140 | } else if (width == MSG_EXT_WDTR_BUS_16_BIT) { | |
3141 | /* | |
3142 | * If the next narrow speed is greater than | |
3143 | * the next wide speed, fallback to narrow. | |
3144 | * Otherwise fallback to the next DT/Wide setting. | |
3145 | * The narrow async speed will always be smaller | |
3146 | * than the wide async speed, so handle this case | |
3147 | * specifically. | |
3148 | */ | |
3149 | ppr_options = targ->dv_max_ppr_options; | |
3150 | if (narrow_speed > fallback_speed | |
3151 | || period >= AHD_ASYNC_XFER_PERIOD) { | |
3152 | targ->dv_next_wide_period = period+1; | |
3153 | width = MSG_EXT_WDTR_BUS_8_BIT; | |
3154 | period = targ->dv_next_narrow_period; | |
3155 | } else { | |
3156 | period++; | |
3157 | } | |
3158 | } else if ((ahd->features & AHD_WIDE) != 0 | |
3159 | && targ->dv_max_width != 0 | |
3160 | && wide_speed >= fallback_speed | |
3161 | && (targ->dv_next_wide_period <= AHD_ASYNC_XFER_PERIOD | |
3162 | || period >= AHD_ASYNC_XFER_PERIOD)) { | |
3163 | ||
3164 | /* | |
3165 | * We are narrow. Try falling back | |
3166 | * to the next wide speed with | |
3167 | * all supported ppr options set. | |
3168 | */ | |
3169 | targ->dv_next_narrow_period = period+1; | |
3170 | width = MSG_EXT_WDTR_BUS_16_BIT; | |
3171 | period = targ->dv_next_wide_period; | |
3172 | ppr_options = targ->dv_max_ppr_options; | |
3173 | } else { | |
3174 | /* Only narrow fallback is allowed. */ | |
3175 | period++; | |
3176 | ppr_options = targ->dv_max_ppr_options; | |
3177 | } | |
3178 | } else { | |
3179 | return (-1); | |
3180 | } | |
3181 | offset = MAX_OFFSET; | |
3182 | ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_PACED); | |
3183 | ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, FALSE); | |
3184 | if (period == 0) { | |
3185 | period = 0; | |
3186 | offset = 0; | |
3187 | ppr_options = 0; | |
3188 | if (width == MSG_EXT_WDTR_BUS_8_BIT) | |
3189 | targ->dv_next_narrow_period = AHD_ASYNC_XFER_PERIOD; | |
3190 | else | |
3191 | targ->dv_next_wide_period = AHD_ASYNC_XFER_PERIOD; | |
3192 | } | |
3193 | ahd_set_syncrate(ahd, devinfo, period, offset, | |
3194 | ppr_options, AHD_TRANS_GOAL, FALSE); | |
3195 | targ->dv_last_ppr_options = ppr_options; | |
3196 | return (0); | |
3197 | } | |
3198 | ||
3199 | static void | |
3200 | ahd_linux_dv_timeout(struct scsi_cmnd *cmd) | |
3201 | { | |
3202 | struct ahd_softc *ahd; | |
3203 | struct scb *scb; | |
3204 | u_long flags; | |
3205 | ||
3206 | ahd = *((struct ahd_softc **)cmd->device->host->hostdata); | |
3207 | ahd_lock(ahd, &flags); | |
3208 | ||
3209 | #ifdef AHD_DEBUG | |
3210 | if (ahd_debug & AHD_SHOW_DV) { | |
3211 | printf("%s: Timeout while doing DV command %x.\n", | |
3212 | ahd_name(ahd), cmd->cmnd[0]); | |
3213 | ahd_dump_card_state(ahd); | |
3214 | } | |
3215 | #endif | |
3216 | ||
3217 | /* | |
3218 | * Guard against "done race". No action is | |
3219 | * required if we just completed. | |
3220 | */ | |
3221 | if ((scb = (struct scb *)cmd->host_scribble) == NULL) { | |
3222 | ahd_unlock(ahd, &flags); | |
3223 | return; | |
3224 | } | |
3225 | ||
3226 | /* | |
3227 | * Command has not completed. Mark this | |
3228 | * SCB as having failing status prior to | |
3229 | * resetting the bus, so we get the correct | |
3230 | * error code. | |
3231 | */ | |
3232 | if ((scb->flags & SCB_SENSE) != 0) | |
3233 | ahd_set_transaction_status(scb, CAM_AUTOSENSE_FAIL); | |
3234 | else | |
3235 | ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); | |
3236 | ahd_reset_channel(ahd, cmd->device->channel + 'A', /*initiate*/TRUE); | |
3237 | ||
3238 | /* | |
3239 | * Add a minimal bus settle delay for devices that are slow to | |
3240 | * respond after bus resets. | |
3241 | */ | |
3242 | ahd_freeze_simq(ahd); | |
3243 | init_timer(&ahd->platform_data->reset_timer); | |
3244 | ahd->platform_data->reset_timer.data = (u_long)ahd; | |
3245 | ahd->platform_data->reset_timer.expires = jiffies + HZ / 2; | |
3246 | ahd->platform_data->reset_timer.function = | |
3247 | (ahd_linux_callback_t *)ahd_release_simq; | |
3248 | add_timer(&ahd->platform_data->reset_timer); | |
1da177e4 LT |
3249 | ahd_linux_run_complete_queue(ahd); |
3250 | ahd_unlock(ahd, &flags); | |
3251 | } | |
3252 | ||
3253 | static void | |
3254 | ahd_linux_dv_complete(struct scsi_cmnd *cmd) | |
3255 | { | |
3256 | struct ahd_softc *ahd; | |
3257 | ||
3258 | ahd = *((struct ahd_softc **)cmd->device->host->hostdata); | |
3259 | ||
3260 | /* Delete the DV timer before it goes off! */ | |
3261 | scsi_delete_timer(cmd); | |
3262 | ||
3263 | #ifdef AHD_DEBUG | |
3264 | if (ahd_debug & AHD_SHOW_DV) | |
3265 | printf("%s:%c:%d: Command completed, status= 0x%x\n", | |
3266 | ahd_name(ahd), cmd->device->channel, cmd->device->id, | |
3267 | cmd->result); | |
3268 | #endif | |
3269 | ||
3270 | /* Wake up the state machine */ | |
3271 | up(&ahd->platform_data->dv_cmd_sem); | |
3272 | } | |
3273 | ||
3274 | static void | |
3275 | ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ) | |
3276 | { | |
3277 | uint16_t b; | |
3278 | u_int i; | |
3279 | u_int j; | |
3280 | ||
3281 | if (targ->dv_buffer != NULL) | |
3282 | free(targ->dv_buffer, M_DEVBUF); | |
3283 | targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK); | |
3284 | if (targ->dv_buffer1 != NULL) | |
3285 | free(targ->dv_buffer1, M_DEVBUF); | |
3286 | targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK); | |
3287 | ||
3288 | i = 0; | |
3289 | ||
3290 | b = 0x0001; | |
3291 | for (j = 0 ; i < targ->dv_echo_size; j++) { | |
3292 | if (j < 32) { | |
3293 | /* | |
3294 | * 32bytes of sequential numbers. | |
3295 | */ | |
3296 | targ->dv_buffer[i++] = j & 0xff; | |
3297 | } else if (j < 48) { | |
3298 | /* | |
3299 | * 32bytes of repeating 0x0000, 0xffff. | |
3300 | */ | |
3301 | targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00; | |
3302 | } else if (j < 64) { | |
3303 | /* | |
3304 | * 32bytes of repeating 0x5555, 0xaaaa. | |
3305 | */ | |
3306 | targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55; | |
3307 | } else { | |
3308 | /* | |
3309 | * Remaining buffer is filled with a repeating | |
3310 | * patter of: | |
3311 | * | |
3312 | * 0xffff | |
3313 | * ~0x0001 << shifted once in each loop. | |
3314 | */ | |
3315 | if (j & 0x02) { | |
3316 | if (j & 0x01) { | |
3317 | targ->dv_buffer[i++] = ~(b >> 8) & 0xff; | |
3318 | b <<= 1; | |
3319 | if (b == 0x0000) | |
3320 | b = 0x0001; | |
3321 | } else { | |
3322 | targ->dv_buffer[i++] = (~b & 0xff); | |
3323 | } | |
3324 | } else { | |
3325 | targ->dv_buffer[i++] = 0xff; | |
3326 | } | |
3327 | } | |
3328 | } | |
3329 | } | |
3330 | ||
3331 | static u_int | |
3332 | ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) | |
3333 | { | |
3334 | static int warned_user; | |
3335 | u_int tags; | |
3336 | ||
3337 | tags = 0; | |
3338 | if ((ahd->user_discenable & devinfo->target_mask) != 0) { | |
3339 | if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) { | |
3340 | ||
3341 | if (warned_user == 0) { | |
3342 | printf(KERN_WARNING | |
3343 | "aic79xx: WARNING: Insufficient tag_info instances\n" | |
3344 | "aic79xx: for installed controllers. Using defaults\n" | |
3345 | "aic79xx: Please update the aic79xx_tag_info array in\n" | |
3346 | "aic79xx: the aic79xx_osm.c source file.\n"); | |
3347 | warned_user++; | |
3348 | } | |
3349 | tags = AHD_MAX_QUEUE; | |
3350 | } else { | |
3351 | adapter_tag_info_t *tag_info; | |
3352 | ||
3353 | tag_info = &aic79xx_tag_info[ahd->unit]; | |
3354 | tags = tag_info->tag_commands[devinfo->target_offset]; | |
3355 | if (tags > AHD_MAX_QUEUE) | |
3356 | tags = AHD_MAX_QUEUE; | |
3357 | } | |
3358 | } | |
3359 | return (tags); | |
3360 | } | |
3361 | ||
3362 | static u_int | |
3363 | ahd_linux_user_dv_setting(struct ahd_softc *ahd) | |
3364 | { | |
3365 | static int warned_user; | |
3366 | int dv; | |
3367 | ||
3368 | if (ahd->unit >= NUM_ELEMENTS(aic79xx_dv_settings)) { | |
3369 | ||
3370 | if (warned_user == 0) { | |
3371 | printf(KERN_WARNING | |
3372 | "aic79xx: WARNING: Insufficient dv settings instances\n" | |
3373 | "aic79xx: for installed controllers. Using defaults\n" | |
3374 | "aic79xx: Please update the aic79xx_dv_settings array in" | |
3375 | "aic79xx: the aic79xx_osm.c source file.\n"); | |
3376 | warned_user++; | |
3377 | } | |
3378 | dv = -1; | |
3379 | } else { | |
3380 | ||
3381 | dv = aic79xx_dv_settings[ahd->unit]; | |
3382 | } | |
3383 | ||
3384 | if (dv < 0) { | |
3385 | /* | |
3386 | * Apply the default. | |
3387 | */ | |
3388 | dv = 1; | |
3389 | if (ahd->seep_config != 0) | |
3390 | dv = (ahd->seep_config->bios_control & CFENABLEDV); | |
3391 | } | |
3392 | return (dv); | |
3393 | } | |
3394 | ||
3395 | static void | |
3396 | ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd) | |
3397 | { | |
3398 | static int warned_user; | |
3399 | u_int rd_strm_mask; | |
3400 | u_int target_id; | |
3401 | ||
3402 | /* | |
3403 | * If we have specific read streaming info for this controller, | |
3404 | * apply it. Otherwise use the defaults. | |
3405 | */ | |
3406 | if (ahd->unit >= NUM_ELEMENTS(aic79xx_rd_strm_info)) { | |
3407 | ||
3408 | if (warned_user == 0) { | |
3409 | ||
3410 | printf(KERN_WARNING | |
3411 | "aic79xx: WARNING: Insufficient rd_strm instances\n" | |
3412 | "aic79xx: for installed controllers. Using defaults\n" | |
3413 | "aic79xx: Please update the aic79xx_rd_strm_info array\n" | |
3414 | "aic79xx: in the aic79xx_osm.c source file.\n"); | |
3415 | warned_user++; | |
3416 | } | |
3417 | rd_strm_mask = AIC79XX_CONFIGED_RD_STRM; | |
3418 | } else { | |
3419 | ||
3420 | rd_strm_mask = aic79xx_rd_strm_info[ahd->unit]; | |
3421 | } | |
3422 | for (target_id = 0; target_id < 16; target_id++) { | |
3423 | struct ahd_devinfo devinfo; | |
3424 | struct ahd_initiator_tinfo *tinfo; | |
3425 | struct ahd_tmode_tstate *tstate; | |
3426 | ||
3427 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, | |
3428 | target_id, &tstate); | |
3429 | ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, | |
3430 | CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); | |
3431 | tinfo->user.ppr_options &= ~MSG_EXT_PPR_RD_STRM; | |
3432 | if ((rd_strm_mask & devinfo.target_mask) != 0) | |
3433 | tinfo->user.ppr_options |= MSG_EXT_PPR_RD_STRM; | |
3434 | } | |
3435 | } | |
3436 | ||
3437 | /* | |
3438 | * Determines the queue depth for a given device. | |
3439 | */ | |
3440 | static void | |
3441 | ahd_linux_device_queue_depth(struct ahd_softc *ahd, | |
3442 | struct ahd_linux_device *dev) | |
3443 | { | |
3444 | struct ahd_devinfo devinfo; | |
3445 | u_int tags; | |
3446 | ||
3447 | ahd_compile_devinfo(&devinfo, | |
3448 | ahd->our_id, | |
3449 | dev->target->target, dev->lun, | |
3450 | dev->target->channel == 0 ? 'A' : 'B', | |
3451 | ROLE_INITIATOR); | |
3452 | tags = ahd_linux_user_tagdepth(ahd, &devinfo); | |
3453 | if (tags != 0 | |
3454 | && dev->scsi_device != NULL | |
3455 | && dev->scsi_device->tagged_supported != 0) { | |
3456 | ||
3457 | ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED); | |
3458 | ahd_print_devinfo(ahd, &devinfo); | |
3459 | printf("Tagged Queuing enabled. Depth %d\n", tags); | |
3460 | } else { | |
3461 | ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE); | |
3462 | } | |
3463 | } | |
3464 | ||
60a13213 HR |
3465 | static int |
3466 | ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, | |
3467 | struct scsi_cmnd *cmd) | |
1da177e4 | 3468 | { |
1da177e4 LT |
3469 | struct scb *scb; |
3470 | struct hardware_scb *hscb; | |
3471 | struct ahd_initiator_tinfo *tinfo; | |
3472 | struct ahd_tmode_tstate *tstate; | |
3473 | u_int col_idx; | |
3474 | uint16_t mask; | |
3475 | ||
60a13213 HR |
3476 | /* |
3477 | * Get an scb to use. | |
3478 | */ | |
3479 | tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, | |
3480 | cmd->device->id, &tstate); | |
3481 | if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 | |
3482 | || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { | |
3483 | col_idx = AHD_NEVER_COL_IDX; | |
3484 | } else { | |
3485 | col_idx = AHD_BUILD_COL_IDX(cmd->device->id, | |
3486 | cmd->device->lun); | |
3487 | } | |
3488 | if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { | |
3489 | ahd->flags |= AHD_RESOURCE_SHORTAGE; | |
3490 | return SCSI_MLQUEUE_HOST_BUSY; | |
3491 | } | |
1da177e4 | 3492 | |
60a13213 HR |
3493 | scb->io_ctx = cmd; |
3494 | scb->platform_data->dev = dev; | |
3495 | hscb = scb->hscb; | |
3496 | cmd->host_scribble = (char *)scb; | |
1da177e4 | 3497 | |
60a13213 HR |
3498 | /* |
3499 | * Fill out basics of the HSCB. | |
3500 | */ | |
3501 | hscb->control = 0; | |
3502 | hscb->scsiid = BUILD_SCSIID(ahd, cmd); | |
3503 | hscb->lun = cmd->device->lun; | |
3504 | scb->hscb->task_management = 0; | |
3505 | mask = SCB_GET_TARGET_MASK(ahd, scb); | |
1da177e4 | 3506 | |
60a13213 HR |
3507 | if ((ahd->user_discenable & mask) != 0) |
3508 | hscb->control |= DISCENB; | |
1da177e4 | 3509 | |
60a13213 HR |
3510 | if (AHD_DV_CMD(cmd) != 0) |
3511 | scb->flags |= SCB_SILENT; | |
1da177e4 | 3512 | |
60a13213 HR |
3513 | if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) |
3514 | scb->flags |= SCB_PACKETIZED; | |
1da177e4 | 3515 | |
60a13213 HR |
3516 | if ((tstate->auto_negotiate & mask) != 0) { |
3517 | scb->flags |= SCB_AUTO_NEGOTIATE; | |
3518 | scb->hscb->control |= MK_MESSAGE; | |
3519 | } | |
1da177e4 | 3520 | |
60a13213 HR |
3521 | if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { |
3522 | int msg_bytes; | |
3523 | uint8_t tag_msgs[2]; | |
1da177e4 | 3524 | |
60a13213 HR |
3525 | msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); |
3526 | if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { | |
3527 | hscb->control |= tag_msgs[0]; | |
3528 | if (tag_msgs[0] == MSG_ORDERED_TASK) | |
1da177e4 | 3529 | dev->commands_since_idle_or_otag = 0; |
60a13213 HR |
3530 | } else |
3531 | if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH | |
3532 | && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { | |
3533 | hscb->control |= MSG_ORDERED_TASK; | |
3534 | dev->commands_since_idle_or_otag = 0; | |
3535 | } else { | |
3536 | hscb->control |= MSG_SIMPLE_TASK; | |
1da177e4 | 3537 | } |
60a13213 | 3538 | } |
1da177e4 | 3539 | |
60a13213 HR |
3540 | hscb->cdb_len = cmd->cmd_len; |
3541 | memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); | |
3542 | ||
3543 | scb->sg_count = 0; | |
3544 | ahd_set_residual(scb, 0); | |
3545 | ahd_set_sense_residual(scb, 0); | |
3546 | if (cmd->use_sg != 0) { | |
3547 | void *sg; | |
3548 | struct scatterlist *cur_seg; | |
3549 | u_int nseg; | |
3550 | int dir; | |
3551 | ||
3552 | cur_seg = (struct scatterlist *)cmd->request_buffer; | |
3553 | dir = cmd->sc_data_direction; | |
3554 | nseg = pci_map_sg(ahd->dev_softc, cur_seg, | |
3555 | cmd->use_sg, dir); | |
3556 | scb->platform_data->xfer_len = 0; | |
3557 | for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) { | |
1da177e4 | 3558 | dma_addr_t addr; |
60a13213 | 3559 | bus_size_t len; |
1da177e4 | 3560 | |
60a13213 HR |
3561 | addr = sg_dma_address(cur_seg); |
3562 | len = sg_dma_len(cur_seg); | |
3563 | scb->platform_data->xfer_len += len; | |
3564 | sg = ahd_sg_setup(ahd, scb, sg, addr, len, | |
3565 | /*last*/nseg == 1); | |
1da177e4 | 3566 | } |
60a13213 HR |
3567 | } else if (cmd->request_bufflen != 0) { |
3568 | void *sg; | |
3569 | dma_addr_t addr; | |
3570 | int dir; | |
3571 | ||
3572 | sg = scb->sg_list; | |
3573 | dir = cmd->sc_data_direction; | |
3574 | addr = pci_map_single(ahd->dev_softc, | |
3575 | cmd->request_buffer, | |
3576 | cmd->request_bufflen, dir); | |
3577 | scb->platform_data->xfer_len = cmd->request_bufflen; | |
3578 | scb->platform_data->buf_busaddr = addr; | |
3579 | sg = ahd_sg_setup(ahd, scb, sg, addr, | |
3580 | cmd->request_bufflen, /*last*/TRUE); | |
3581 | } | |
1da177e4 | 3582 | |
60a13213 HR |
3583 | LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); |
3584 | dev->openings--; | |
3585 | dev->active++; | |
3586 | dev->commands_issued++; | |
3587 | ||
3588 | /* Update the error counting bucket and dump if needed */ | |
3589 | if (dev->target->cmds_since_error) { | |
3590 | dev->target->cmds_since_error++; | |
3591 | if (dev->target->cmds_since_error > | |
3592 | AHD_LINUX_ERR_THRESH) | |
3593 | dev->target->cmds_since_error = 0; | |
1da177e4 | 3594 | } |
60a13213 HR |
3595 | |
3596 | if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) | |
3597 | dev->commands_since_idle_or_otag++; | |
3598 | scb->flags |= SCB_ACTIVE; | |
3599 | ahd_queue_scb(ahd, scb); | |
3600 | ||
3601 | return 0; | |
1da177e4 LT |
3602 | } |
3603 | ||
3604 | /* | |
3605 | * SCSI controller interrupt handler. | |
3606 | */ | |
3607 | irqreturn_t | |
3608 | ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs) | |
3609 | { | |
3610 | struct ahd_softc *ahd; | |
3611 | u_long flags; | |
3612 | int ours; | |
3613 | ||
3614 | ahd = (struct ahd_softc *) dev_id; | |
3615 | ahd_lock(ahd, &flags); | |
3616 | ours = ahd_intr(ahd); | |
1da177e4 LT |
3617 | ahd_linux_run_complete_queue(ahd); |
3618 | ahd_unlock(ahd, &flags); | |
3619 | return IRQ_RETVAL(ours); | |
3620 | } | |
3621 | ||
3622 | void | |
3623 | ahd_platform_flushwork(struct ahd_softc *ahd) | |
3624 | { | |
3625 | ||
3626 | while (ahd_linux_run_complete_queue(ahd) != NULL) | |
3627 | ; | |
3628 | } | |
3629 | ||
3630 | static struct ahd_linux_target* | |
3631 | ahd_linux_alloc_target(struct ahd_softc *ahd, u_int channel, u_int target) | |
3632 | { | |
3633 | struct ahd_linux_target *targ; | |
3634 | ||
3635 | targ = malloc(sizeof(*targ), M_DEVBUF, M_NOWAIT); | |
3636 | if (targ == NULL) | |
3637 | return (NULL); | |
3638 | memset(targ, 0, sizeof(*targ)); | |
3639 | targ->channel = channel; | |
3640 | targ->target = target; | |
3641 | targ->ahd = ahd; | |
3642 | targ->flags = AHD_DV_REQUIRED; | |
3643 | ahd->platform_data->targets[target] = targ; | |
3644 | return (targ); | |
3645 | } | |
3646 | ||
3647 | static void | |
3648 | ahd_linux_free_target(struct ahd_softc *ahd, struct ahd_linux_target *targ) | |
3649 | { | |
3650 | struct ahd_devinfo devinfo; | |
3651 | struct ahd_initiator_tinfo *tinfo; | |
3652 | struct ahd_tmode_tstate *tstate; | |
3653 | u_int our_id; | |
3654 | u_int target_offset; | |
3655 | char channel; | |
3656 | ||
3657 | /* | |
3658 | * Force a negotiation to async/narrow on any | |
3659 | * future command to this device unless a bus | |
3660 | * reset occurs between now and that command. | |
3661 | */ | |
3662 | channel = 'A' + targ->channel; | |
3663 | our_id = ahd->our_id; | |
3664 | target_offset = targ->target; | |
3665 | tinfo = ahd_fetch_transinfo(ahd, channel, our_id, | |
3666 | targ->target, &tstate); | |
3667 | ahd_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD, | |
3668 | channel, ROLE_INITIATOR); | |
3669 | ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, | |
3670 | AHD_TRANS_GOAL, /*paused*/FALSE); | |
3671 | ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, | |
3672 | AHD_TRANS_GOAL, /*paused*/FALSE); | |
3673 | ahd_update_neg_request(ahd, &devinfo, tstate, tinfo, AHD_NEG_ALWAYS); | |
3674 | ahd->platform_data->targets[target_offset] = NULL; | |
3675 | if (targ->inq_data != NULL) | |
3676 | free(targ->inq_data, M_DEVBUF); | |
3677 | if (targ->dv_buffer != NULL) | |
3678 | free(targ->dv_buffer, M_DEVBUF); | |
3679 | if (targ->dv_buffer1 != NULL) | |
3680 | free(targ->dv_buffer1, M_DEVBUF); | |
3681 | free(targ, M_DEVBUF); | |
3682 | } | |
3683 | ||
3684 | static struct ahd_linux_device* | |
3685 | ahd_linux_alloc_device(struct ahd_softc *ahd, | |
3686 | struct ahd_linux_target *targ, u_int lun) | |
3687 | { | |
3688 | struct ahd_linux_device *dev; | |
3689 | ||
3690 | dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT); | |
3691 | if (dev == NULL) | |
3692 | return (NULL); | |
3693 | memset(dev, 0, sizeof(*dev)); | |
3694 | init_timer(&dev->timer); | |
1da177e4 LT |
3695 | dev->flags = AHD_DEV_UNCONFIGURED; |
3696 | dev->lun = lun; | |
3697 | dev->target = targ; | |
3698 | ||
3699 | /* | |
3700 | * We start out life using untagged | |
3701 | * transactions of which we allow one. | |
3702 | */ | |
3703 | dev->openings = 1; | |
3704 | ||
3705 | /* | |
3706 | * Set maxtags to 0. This will be changed if we | |
3707 | * later determine that we are dealing with | |
3708 | * a tagged queuing capable device. | |
3709 | */ | |
3710 | dev->maxtags = 0; | |
3711 | ||
3712 | targ->refcount++; | |
3713 | targ->devices[lun] = dev; | |
3714 | return (dev); | |
3715 | } | |
3716 | ||
3717 | static void | |
3718 | ahd_linux_free_device(struct ahd_softc *ahd, struct ahd_linux_device *dev) | |
3719 | { | |
3720 | struct ahd_linux_target *targ; | |
3721 | ||
3722 | del_timer(&dev->timer); | |
3723 | targ = dev->target; | |
3724 | targ->devices[dev->lun] = NULL; | |
3725 | free(dev, M_DEVBUF); | |
3726 | targ->refcount--; | |
3727 | if (targ->refcount == 0 | |
3728 | && (targ->flags & AHD_DV_REQUIRED) == 0) | |
3729 | ahd_linux_free_target(ahd, targ); | |
3730 | } | |
3731 | ||
3732 | void | |
3733 | ahd_send_async(struct ahd_softc *ahd, char channel, | |
3734 | u_int target, u_int lun, ac_code code, void *arg) | |
3735 | { | |
3736 | switch (code) { | |
3737 | case AC_TRANSFER_NEG: | |
3738 | { | |
3739 | char buf[80]; | |
3740 | struct ahd_linux_target *targ; | |
3741 | struct info_str info; | |
3742 | struct ahd_initiator_tinfo *tinfo; | |
3743 | struct ahd_tmode_tstate *tstate; | |
3744 | ||
3745 | info.buffer = buf; | |
3746 | info.length = sizeof(buf); | |
3747 | info.offset = 0; | |
3748 | info.pos = 0; | |
3749 | tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, | |
3750 | target, &tstate); | |
3751 | ||
3752 | /* | |
3753 | * Don't bother reporting results while | |
3754 | * negotiations are still pending. | |
3755 | */ | |
3756 | if (tinfo->curr.period != tinfo->goal.period | |
3757 | || tinfo->curr.width != tinfo->goal.width | |
3758 | || tinfo->curr.offset != tinfo->goal.offset | |
3759 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options) | |
3760 | if (bootverbose == 0) | |
3761 | break; | |
3762 | ||
3763 | /* | |
3764 | * Don't bother reporting results that | |
3765 | * are identical to those last reported. | |
3766 | */ | |
3767 | targ = ahd->platform_data->targets[target]; | |
3768 | if (targ == NULL) | |
3769 | break; | |
3770 | if (tinfo->curr.period == targ->last_tinfo.period | |
3771 | && tinfo->curr.width == targ->last_tinfo.width | |
3772 | && tinfo->curr.offset == targ->last_tinfo.offset | |
3773 | && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options) | |
3774 | if (bootverbose == 0) | |
3775 | break; | |
3776 | ||
3777 | targ->last_tinfo.period = tinfo->curr.period; | |
3778 | targ->last_tinfo.width = tinfo->curr.width; | |
3779 | targ->last_tinfo.offset = tinfo->curr.offset; | |
3780 | targ->last_tinfo.ppr_options = tinfo->curr.ppr_options; | |
3781 | ||
3782 | printf("(%s:%c:", ahd_name(ahd), channel); | |
3783 | if (target == CAM_TARGET_WILDCARD) | |
3784 | printf("*): "); | |
3785 | else | |
3786 | printf("%d): ", target); | |
3787 | ahd_format_transinfo(&info, &tinfo->curr); | |
3788 | if (info.pos < info.length) | |
3789 | *info.buffer = '\0'; | |
3790 | else | |
3791 | buf[info.length - 1] = '\0'; | |
3792 | printf("%s", buf); | |
3793 | break; | |
3794 | } | |
3795 | case AC_SENT_BDR: | |
3796 | { | |
1da177e4 LT |
3797 | WARN_ON(lun != CAM_LUN_WILDCARD); |
3798 | scsi_report_device_reset(ahd->platform_data->host, | |
3799 | channel - 'A', target); | |
1da177e4 LT |
3800 | break; |
3801 | } | |
3802 | case AC_BUS_RESET: | |
3803 | if (ahd->platform_data->host != NULL) { | |
3804 | scsi_report_bus_reset(ahd->platform_data->host, | |
3805 | channel - 'A'); | |
3806 | } | |
3807 | break; | |
3808 | default: | |
3809 | panic("ahd_send_async: Unexpected async event"); | |
3810 | } | |
3811 | } | |
3812 | ||
3813 | /* | |
3814 | * Calls the higher level scsi done function and frees the scb. | |
3815 | */ | |
3816 | void | |
3817 | ahd_done(struct ahd_softc *ahd, struct scb *scb) | |
3818 | { | |
3819 | Scsi_Cmnd *cmd; | |
3820 | struct ahd_linux_device *dev; | |
3821 | ||
3822 | if ((scb->flags & SCB_ACTIVE) == 0) { | |
3823 | printf("SCB %d done'd twice\n", SCB_GET_TAG(scb)); | |
3824 | ahd_dump_card_state(ahd); | |
3825 | panic("Stopping for safety"); | |
3826 | } | |
3827 | LIST_REMOVE(scb, pending_links); | |
3828 | cmd = scb->io_ctx; | |
3829 | dev = scb->platform_data->dev; | |
3830 | dev->active--; | |
3831 | dev->openings++; | |
3832 | if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { | |
3833 | cmd->result &= ~(CAM_DEV_QFRZN << 16); | |
3834 | dev->qfrozen--; | |
3835 | } | |
3836 | ahd_linux_unmap_scb(ahd, scb); | |
3837 | ||
3838 | /* | |
3839 | * Guard against stale sense data. | |
3840 | * The Linux mid-layer assumes that sense | |
3841 | * was retrieved anytime the first byte of | |
3842 | * the sense buffer looks "sane". | |
3843 | */ | |
3844 | cmd->sense_buffer[0] = 0; | |
3845 | if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { | |
3846 | uint32_t amount_xferred; | |
3847 | ||
3848 | amount_xferred = | |
3849 | ahd_get_transfer_length(scb) - ahd_get_residual(scb); | |
3850 | if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { | |
3851 | #ifdef AHD_DEBUG | |
3852 | if ((ahd_debug & AHD_SHOW_MISC) != 0) { | |
3853 | ahd_print_path(ahd, scb); | |
3854 | printf("Set CAM_UNCOR_PARITY\n"); | |
3855 | } | |
3856 | #endif | |
3857 | ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); | |
3858 | #ifdef AHD_REPORT_UNDERFLOWS | |
3859 | /* | |
3860 | * This code is disabled by default as some | |
3861 | * clients of the SCSI system do not properly | |
3862 | * initialize the underflow parameter. This | |
3863 | * results in spurious termination of commands | |
3864 | * that complete as expected (e.g. underflow is | |
3865 | * allowed as command can return variable amounts | |
3866 | * of data. | |
3867 | */ | |
3868 | } else if (amount_xferred < scb->io_ctx->underflow) { | |
3869 | u_int i; | |
3870 | ||
3871 | ahd_print_path(ahd, scb); | |
3872 | printf("CDB:"); | |
3873 | for (i = 0; i < scb->io_ctx->cmd_len; i++) | |
3874 | printf(" 0x%x", scb->io_ctx->cmnd[i]); | |
3875 | printf("\n"); | |
3876 | ahd_print_path(ahd, scb); | |
3877 | printf("Saw underflow (%ld of %ld bytes). " | |
3878 | "Treated as error\n", | |
3879 | ahd_get_residual(scb), | |
3880 | ahd_get_transfer_length(scb)); | |
3881 | ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); | |
3882 | #endif | |
3883 | } else { | |
3884 | ahd_set_transaction_status(scb, CAM_REQ_CMP); | |
3885 | } | |
3886 | } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { | |
3887 | ahd_linux_handle_scsi_status(ahd, dev, scb); | |
3888 | } else if (ahd_get_transaction_status(scb) == CAM_SEL_TIMEOUT) { | |
3889 | dev->flags |= AHD_DEV_UNCONFIGURED; | |
3890 | if (AHD_DV_CMD(cmd) == FALSE) | |
3891 | dev->target->flags &= ~AHD_DV_REQUIRED; | |
3892 | } | |
3893 | /* | |
3894 | * Start DV for devices that require it assuming the first command | |
3895 | * sent does not result in a selection timeout. | |
3896 | */ | |
3897 | if (ahd_get_transaction_status(scb) != CAM_SEL_TIMEOUT | |
3898 | && (dev->target->flags & AHD_DV_REQUIRED) != 0) | |
3899 | ahd_linux_start_dv(ahd); | |
3900 | ||
3901 | if (dev->openings == 1 | |
3902 | && ahd_get_transaction_status(scb) == CAM_REQ_CMP | |
3903 | && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) | |
3904 | dev->tag_success_count++; | |
3905 | /* | |
3906 | * Some devices deal with temporary internal resource | |
3907 | * shortages by returning queue full. When the queue | |
3908 | * full occurrs, we throttle back. Slowly try to get | |
3909 | * back to our previous queue depth. | |
3910 | */ | |
3911 | if ((dev->openings + dev->active) < dev->maxtags | |
3912 | && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { | |
3913 | dev->tag_success_count = 0; | |
3914 | dev->openings++; | |
3915 | } | |
3916 | ||
3917 | if (dev->active == 0) | |
3918 | dev->commands_since_idle_or_otag = 0; | |
3919 | ||
60a13213 HR |
3920 | if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0 |
3921 | && dev->active == 0 | |
3922 | && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0) | |
3923 | ahd_linux_free_device(ahd, dev); | |
1da177e4 LT |
3924 | |
3925 | if ((scb->flags & SCB_RECOVERY_SCB) != 0) { | |
3926 | printf("Recovery SCB completes\n"); | |
3927 | if (ahd_get_transaction_status(scb) == CAM_BDR_SENT | |
3928 | || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) | |
3929 | ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); | |
3930 | if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) { | |
3931 | scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM; | |
3932 | up(&ahd->platform_data->eh_sem); | |
3933 | } | |
3934 | } | |
3935 | ||
3936 | ahd_free_scb(ahd, scb); | |
3937 | ahd_linux_queue_cmd_complete(ahd, cmd); | |
3938 | ||
3939 | if ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_EMPTY) != 0 | |
3940 | && LIST_FIRST(&ahd->pending_scbs) == NULL) { | |
3941 | ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_EMPTY; | |
3942 | up(&ahd->platform_data->dv_sem); | |
3943 | } | |
3944 | } | |
3945 | ||
3946 | static void | |
3947 | ahd_linux_handle_scsi_status(struct ahd_softc *ahd, | |
3948 | struct ahd_linux_device *dev, struct scb *scb) | |
3949 | { | |
3950 | struct ahd_devinfo devinfo; | |
3951 | ||
3952 | ahd_compile_devinfo(&devinfo, | |
3953 | ahd->our_id, | |
3954 | dev->target->target, dev->lun, | |
3955 | dev->target->channel == 0 ? 'A' : 'B', | |
3956 | ROLE_INITIATOR); | |
3957 | ||
3958 | /* | |
3959 | * We don't currently trust the mid-layer to | |
3960 | * properly deal with queue full or busy. So, | |
3961 | * when one occurs, we tell the mid-layer to | |
3962 | * unconditionally requeue the command to us | |
3963 | * so that we can retry it ourselves. We also | |
3964 | * implement our own throttling mechanism so | |
3965 | * we don't clobber the device with too many | |
3966 | * commands. | |
3967 | */ | |
3968 | switch (ahd_get_scsi_status(scb)) { | |
3969 | default: | |
3970 | break; | |
3971 | case SCSI_STATUS_CHECK_COND: | |
3972 | case SCSI_STATUS_CMD_TERMINATED: | |
3973 | { | |
3974 | Scsi_Cmnd *cmd; | |
3975 | ||
3976 | /* | |
3977 | * Copy sense information to the OS's cmd | |
3978 | * structure if it is available. | |
3979 | */ | |
3980 | cmd = scb->io_ctx; | |
3981 | if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { | |
3982 | struct scsi_status_iu_header *siu; | |
3983 | u_int sense_size; | |
3984 | u_int sense_offset; | |
3985 | ||
3986 | if (scb->flags & SCB_SENSE) { | |
3987 | sense_size = MIN(sizeof(struct scsi_sense_data) | |
3988 | - ahd_get_sense_residual(scb), | |
3989 | sizeof(cmd->sense_buffer)); | |
3990 | sense_offset = 0; | |
3991 | } else { | |
3992 | /* | |
3993 | * Copy only the sense data into the provided | |
3994 | * buffer. | |
3995 | */ | |
3996 | siu = (struct scsi_status_iu_header *) | |
3997 | scb->sense_data; | |
3998 | sense_size = MIN(scsi_4btoul(siu->sense_length), | |
3999 | sizeof(cmd->sense_buffer)); | |
4000 | sense_offset = SIU_SENSE_OFFSET(siu); | |
4001 | } | |
4002 | ||
4003 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); | |
4004 | memcpy(cmd->sense_buffer, | |
4005 | ahd_get_sense_buf(ahd, scb) | |
4006 | + sense_offset, sense_size); | |
4007 | cmd->result |= (DRIVER_SENSE << 24); | |
4008 | ||
4009 | #ifdef AHD_DEBUG | |
4010 | if (ahd_debug & AHD_SHOW_SENSE) { | |
4011 | int i; | |
4012 | ||
4013 | printf("Copied %d bytes of sense data at %d:", | |
4014 | sense_size, sense_offset); | |
4015 | for (i = 0; i < sense_size; i++) { | |
4016 | if ((i & 0xF) == 0) | |
4017 | printf("\n"); | |
4018 | printf("0x%x ", cmd->sense_buffer[i]); | |
4019 | } | |
4020 | printf("\n"); | |
4021 | } | |
4022 | #endif | |
4023 | } | |
4024 | break; | |
4025 | } | |
4026 | case SCSI_STATUS_QUEUE_FULL: | |
4027 | { | |
4028 | /* | |
4029 | * By the time the core driver has returned this | |
4030 | * command, all other commands that were queued | |
4031 | * to us but not the device have been returned. | |
4032 | * This ensures that dev->active is equal to | |
4033 | * the number of commands actually queued to | |
4034 | * the device. | |
4035 | */ | |
4036 | dev->tag_success_count = 0; | |
4037 | if (dev->active != 0) { | |
4038 | /* | |
4039 | * Drop our opening count to the number | |
4040 | * of commands currently outstanding. | |
4041 | */ | |
4042 | dev->openings = 0; | |
4043 | #ifdef AHD_DEBUG | |
4044 | if ((ahd_debug & AHD_SHOW_QFULL) != 0) { | |
4045 | ahd_print_path(ahd, scb); | |
4046 | printf("Dropping tag count to %d\n", | |
4047 | dev->active); | |
4048 | } | |
4049 | #endif | |
4050 | if (dev->active == dev->tags_on_last_queuefull) { | |
4051 | ||
4052 | dev->last_queuefull_same_count++; | |
4053 | /* | |
4054 | * If we repeatedly see a queue full | |
4055 | * at the same queue depth, this | |
4056 | * device has a fixed number of tag | |
4057 | * slots. Lock in this tag depth | |
4058 | * so we stop seeing queue fulls from | |
4059 | * this device. | |
4060 | */ | |
4061 | if (dev->last_queuefull_same_count | |
4062 | == AHD_LOCK_TAGS_COUNT) { | |
4063 | dev->maxtags = dev->active; | |
4064 | ahd_print_path(ahd, scb); | |
4065 | printf("Locking max tag count at %d\n", | |
4066 | dev->active); | |
4067 | } | |
4068 | } else { | |
4069 | dev->tags_on_last_queuefull = dev->active; | |
4070 | dev->last_queuefull_same_count = 0; | |
4071 | } | |
4072 | ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); | |
4073 | ahd_set_scsi_status(scb, SCSI_STATUS_OK); | |
4074 | ahd_platform_set_tags(ahd, &devinfo, | |
4075 | (dev->flags & AHD_DEV_Q_BASIC) | |
4076 | ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); | |
4077 | break; | |
4078 | } | |
4079 | /* | |
4080 | * Drop down to a single opening, and treat this | |
4081 | * as if the target returned BUSY SCSI status. | |
4082 | */ | |
4083 | dev->openings = 1; | |
4084 | ahd_platform_set_tags(ahd, &devinfo, | |
4085 | (dev->flags & AHD_DEV_Q_BASIC) | |
4086 | ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); | |
4087 | ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); | |
4088 | /* FALLTHROUGH */ | |
4089 | } | |
4090 | case SCSI_STATUS_BUSY: | |
4091 | /* | |
4092 | * Set a short timer to defer sending commands for | |
4093 | * a bit since Linux will not delay in this case. | |
4094 | */ | |
4095 | if ((dev->flags & AHD_DEV_TIMER_ACTIVE) != 0) { | |
4096 | printf("%s:%c:%d: Device Timer still active during " | |
4097 | "busy processing\n", ahd_name(ahd), | |
4098 | dev->target->channel, dev->target->target); | |
4099 | break; | |
4100 | } | |
4101 | dev->flags |= AHD_DEV_TIMER_ACTIVE; | |
4102 | dev->qfrozen++; | |
4103 | init_timer(&dev->timer); | |
4104 | dev->timer.data = (u_long)dev; | |
4105 | dev->timer.expires = jiffies + (HZ/2); | |
4106 | dev->timer.function = ahd_linux_dev_timed_unfreeze; | |
4107 | add_timer(&dev->timer); | |
4108 | break; | |
4109 | } | |
4110 | } | |
4111 | ||
4112 | static void | |
4113 | ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, Scsi_Cmnd *cmd) | |
4114 | { | |
4115 | /* | |
4116 | * Typically, the complete queue has very few entries | |
4117 | * queued to it before the queue is emptied by | |
4118 | * ahd_linux_run_complete_queue, so sorting the entries | |
4119 | * by generation number should be inexpensive. | |
4120 | * We perform the sort so that commands that complete | |
4121 | * with an error are retuned in the order origionally | |
4122 | * queued to the controller so that any subsequent retries | |
4123 | * are performed in order. The underlying ahd routines do | |
4124 | * not guarantee the order that aborted commands will be | |
4125 | * returned to us. | |
4126 | */ | |
4127 | struct ahd_completeq *completeq; | |
4128 | struct ahd_cmd *list_cmd; | |
4129 | struct ahd_cmd *acmd; | |
4130 | ||
4131 | /* | |
4132 | * Map CAM error codes into Linux Error codes. We | |
4133 | * avoid the conversion so that the DV code has the | |
4134 | * full error information available when making | |
4135 | * state change decisions. | |
4136 | */ | |
4137 | if (AHD_DV_CMD(cmd) == FALSE) { | |
4138 | uint32_t status; | |
4139 | u_int new_status; | |
4140 | ||
4141 | status = ahd_cmd_get_transaction_status(cmd); | |
4142 | if (status != CAM_REQ_CMP) { | |
4143 | struct ahd_linux_device *dev; | |
4144 | struct ahd_devinfo devinfo; | |
4145 | cam_status cam_status; | |
4146 | uint32_t action; | |
4147 | u_int scsi_status; | |
4148 | ||
4149 | dev = ahd_linux_get_device(ahd, cmd->device->channel, | |
4150 | cmd->device->id, | |
4151 | cmd->device->lun, | |
4152 | /*alloc*/FALSE); | |
4153 | ||
4154 | if (dev == NULL) | |
4155 | goto no_fallback; | |
4156 | ||
4157 | ahd_compile_devinfo(&devinfo, | |
4158 | ahd->our_id, | |
4159 | dev->target->target, dev->lun, | |
4160 | dev->target->channel == 0 ? 'A':'B', | |
4161 | ROLE_INITIATOR); | |
4162 | ||
4163 | scsi_status = ahd_cmd_get_scsi_status(cmd); | |
4164 | cam_status = ahd_cmd_get_transaction_status(cmd); | |
4165 | action = aic_error_action(cmd, dev->target->inq_data, | |
4166 | cam_status, scsi_status); | |
4167 | if ((action & SSQ_FALLBACK) != 0) { | |
4168 | ||
4169 | /* Update stats */ | |
4170 | dev->target->errors_detected++; | |
4171 | if (dev->target->cmds_since_error == 0) | |
4172 | dev->target->cmds_since_error++; | |
4173 | else { | |
4174 | dev->target->cmds_since_error = 0; | |
4175 | ahd_linux_fallback(ahd, &devinfo); | |
4176 | } | |
4177 | } | |
4178 | } | |
4179 | no_fallback: | |
4180 | switch (status) { | |
4181 | case CAM_REQ_INPROG: | |
4182 | case CAM_REQ_CMP: | |
4183 | case CAM_SCSI_STATUS_ERROR: | |
4184 | new_status = DID_OK; | |
4185 | break; | |
4186 | case CAM_REQ_ABORTED: | |
4187 | new_status = DID_ABORT; | |
4188 | break; | |
4189 | case CAM_BUSY: | |
4190 | new_status = DID_BUS_BUSY; | |
4191 | break; | |
4192 | case CAM_REQ_INVALID: | |
4193 | case CAM_PATH_INVALID: | |
4194 | new_status = DID_BAD_TARGET; | |
4195 | break; | |
4196 | case CAM_SEL_TIMEOUT: | |
4197 | new_status = DID_NO_CONNECT; | |
4198 | break; | |
4199 | case CAM_SCSI_BUS_RESET: | |
4200 | case CAM_BDR_SENT: | |
4201 | new_status = DID_RESET; | |
4202 | break; | |
4203 | case CAM_UNCOR_PARITY: | |
4204 | new_status = DID_PARITY; | |
4205 | break; | |
4206 | case CAM_CMD_TIMEOUT: | |
4207 | new_status = DID_TIME_OUT; | |
4208 | break; | |
4209 | case CAM_UA_ABORT: | |
4210 | case CAM_REQ_CMP_ERR: | |
4211 | case CAM_AUTOSENSE_FAIL: | |
4212 | case CAM_NO_HBA: | |
4213 | case CAM_DATA_RUN_ERR: | |
4214 | case CAM_UNEXP_BUSFREE: | |
4215 | case CAM_SEQUENCE_FAIL: | |
4216 | case CAM_CCB_LEN_ERR: | |
4217 | case CAM_PROVIDE_FAIL: | |
4218 | case CAM_REQ_TERMIO: | |
4219 | case CAM_UNREC_HBA_ERROR: | |
4220 | case CAM_REQ_TOO_BIG: | |
4221 | new_status = DID_ERROR; | |
4222 | break; | |
4223 | case CAM_REQUEUE_REQ: | |
4224 | /* | |
4225 | * If we want the request requeued, make sure there | |
4226 | * are sufficent retries. In the old scsi error code, | |
4227 | * we used to be able to specify a result code that | |
4228 | * bypassed the retry count. Now we must use this | |
4229 | * hack. We also "fake" a check condition with | |
4230 | * a sense code of ABORTED COMMAND. This seems to | |
4231 | * evoke a retry even if this command is being sent | |
4232 | * via the eh thread. Ick! Ick! Ick! | |
4233 | */ | |
4234 | if (cmd->retries > 0) | |
4235 | cmd->retries--; | |
4236 | new_status = DID_OK; | |
4237 | ahd_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND); | |
4238 | cmd->result |= (DRIVER_SENSE << 24); | |
4239 | memset(cmd->sense_buffer, 0, | |
4240 | sizeof(cmd->sense_buffer)); | |
4241 | cmd->sense_buffer[0] = SSD_ERRCODE_VALID | |
4242 | | SSD_CURRENT_ERROR; | |
4243 | cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND; | |
4244 | break; | |
4245 | default: | |
4246 | /* We should never get here */ | |
4247 | new_status = DID_ERROR; | |
4248 | break; | |
4249 | } | |
4250 | ||
4251 | ahd_cmd_set_transaction_status(cmd, new_status); | |
4252 | } | |
4253 | ||
4254 | completeq = &ahd->platform_data->completeq; | |
4255 | list_cmd = TAILQ_FIRST(completeq); | |
4256 | acmd = (struct ahd_cmd *)cmd; | |
4257 | while (list_cmd != NULL | |
4258 | && acmd_scsi_cmd(list_cmd).serial_number | |
4259 | < acmd_scsi_cmd(acmd).serial_number) | |
4260 | list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe); | |
4261 | if (list_cmd != NULL) | |
4262 | TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe); | |
4263 | else | |
4264 | TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe); | |
4265 | } | |
4266 | ||
4267 | static void | |
4268 | ahd_linux_filter_inquiry(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) | |
4269 | { | |
4270 | struct scsi_inquiry_data *sid; | |
4271 | struct ahd_initiator_tinfo *tinfo; | |
4272 | struct ahd_transinfo *user; | |
4273 | struct ahd_transinfo *goal; | |
4274 | struct ahd_transinfo *curr; | |
4275 | struct ahd_tmode_tstate *tstate; | |
4276 | struct ahd_linux_device *dev; | |
4277 | u_int width; | |
4278 | u_int period; | |
4279 | u_int offset; | |
4280 | u_int ppr_options; | |
4281 | u_int trans_version; | |
4282 | u_int prot_version; | |
4283 | ||
4284 | /* | |
4285 | * Determine if this lun actually exists. If so, | |
4286 | * hold on to its corresponding device structure. | |
4287 | * If not, make sure we release the device and | |
4288 | * don't bother processing the rest of this inquiry | |
4289 | * command. | |
4290 | */ | |
4291 | dev = ahd_linux_get_device(ahd, devinfo->channel - 'A', | |
4292 | devinfo->target, devinfo->lun, | |
4293 | /*alloc*/TRUE); | |
4294 | ||
4295 | sid = (struct scsi_inquiry_data *)dev->target->inq_data; | |
4296 | if (SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) { | |
4297 | ||
4298 | dev->flags &= ~AHD_DEV_UNCONFIGURED; | |
4299 | } else { | |
4300 | dev->flags |= AHD_DEV_UNCONFIGURED; | |
4301 | return; | |
4302 | } | |
4303 | ||
4304 | /* | |
4305 | * Update our notion of this device's transfer | |
4306 | * negotiation capabilities. | |
4307 | */ | |
4308 | tinfo = ahd_fetch_transinfo(ahd, devinfo->channel, | |
4309 | devinfo->our_scsiid, | |
4310 | devinfo->target, &tstate); | |
4311 | user = &tinfo->user; | |
4312 | goal = &tinfo->goal; | |
4313 | curr = &tinfo->curr; | |
4314 | width = user->width; | |
4315 | period = user->period; | |
4316 | offset = user->offset; | |
4317 | ppr_options = user->ppr_options; | |
4318 | trans_version = user->transport_version; | |
4319 | prot_version = MIN(user->protocol_version, SID_ANSI_REV(sid)); | |
4320 | ||
4321 | /* | |
4322 | * Only attempt SPI3/4 once we've verified that | |
4323 | * the device claims to support SPI3/4 features. | |
4324 | */ | |
4325 | if (prot_version < SCSI_REV_2) | |
4326 | trans_version = SID_ANSI_REV(sid); | |
4327 | else | |
4328 | trans_version = SCSI_REV_2; | |
4329 | ||
4330 | if ((sid->flags & SID_WBus16) == 0) | |
4331 | width = MSG_EXT_WDTR_BUS_8_BIT; | |
4332 | if ((sid->flags & SID_Sync) == 0) { | |
4333 | period = 0; | |
4334 | offset = 0; | |
4335 | ppr_options = 0; | |
4336 | } | |
4337 | if ((sid->spi3data & SID_SPI_QAS) == 0) | |
4338 | ppr_options &= ~MSG_EXT_PPR_QAS_REQ; | |
4339 | if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0) | |
4340 | ppr_options &= MSG_EXT_PPR_QAS_REQ; | |
4341 | if ((sid->spi3data & SID_SPI_IUS) == 0) | |
4342 | ppr_options &= (MSG_EXT_PPR_DT_REQ | |
4343 | | MSG_EXT_PPR_QAS_REQ); | |
4344 | ||
4345 | if (prot_version > SCSI_REV_2 | |
4346 | && ppr_options != 0) | |
4347 | trans_version = user->transport_version; | |
4348 | ||
4349 | ahd_validate_width(ahd, /*tinfo limit*/NULL, &width, ROLE_UNKNOWN); | |
4350 | ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX); | |
4351 | ahd_validate_offset(ahd, /*tinfo limit*/NULL, period, | |
4352 | &offset, width, ROLE_UNKNOWN); | |
4353 | if (offset == 0 || period == 0) { | |
4354 | period = 0; | |
4355 | offset = 0; | |
4356 | ppr_options = 0; | |
4357 | } | |
4358 | /* Apply our filtered user settings. */ | |
4359 | curr->transport_version = trans_version; | |
4360 | curr->protocol_version = prot_version; | |
4361 | ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, /*paused*/FALSE); | |
4362 | ahd_set_syncrate(ahd, devinfo, period, offset, ppr_options, | |
4363 | AHD_TRANS_GOAL, /*paused*/FALSE); | |
4364 | } | |
4365 | ||
4366 | void | |
4367 | ahd_freeze_simq(struct ahd_softc *ahd) | |
4368 | { | |
4369 | ahd->platform_data->qfrozen++; | |
4370 | if (ahd->platform_data->qfrozen == 1) { | |
4371 | scsi_block_requests(ahd->platform_data->host); | |
4372 | ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS, | |
4373 | CAM_LUN_WILDCARD, SCB_LIST_NULL, | |
4374 | ROLE_INITIATOR, CAM_REQUEUE_REQ); | |
4375 | } | |
4376 | } | |
4377 | ||
4378 | void | |
4379 | ahd_release_simq(struct ahd_softc *ahd) | |
4380 | { | |
4381 | u_long s; | |
4382 | int unblock_reqs; | |
4383 | ||
4384 | unblock_reqs = 0; | |
4385 | ahd_lock(ahd, &s); | |
4386 | if (ahd->platform_data->qfrozen > 0) | |
4387 | ahd->platform_data->qfrozen--; | |
4388 | if (ahd->platform_data->qfrozen == 0) { | |
4389 | unblock_reqs = 1; | |
4390 | } | |
4391 | if (AHD_DV_SIMQ_FROZEN(ahd) | |
4392 | && ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_RELEASE) != 0)) { | |
4393 | ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_RELEASE; | |
4394 | up(&ahd->platform_data->dv_sem); | |
4395 | } | |
1da177e4 LT |
4396 | ahd_unlock(ahd, &s); |
4397 | /* | |
4398 | * There is still a race here. The mid-layer | |
4399 | * should keep its own freeze count and use | |
4400 | * a bottom half handler to run the queues | |
4401 | * so we can unblock with our own lock held. | |
4402 | */ | |
4403 | if (unblock_reqs) | |
4404 | scsi_unblock_requests(ahd->platform_data->host); | |
4405 | } | |
4406 | ||
4407 | static void | |
4408 | ahd_linux_sem_timeout(u_long arg) | |
4409 | { | |
4410 | struct scb *scb; | |
4411 | struct ahd_softc *ahd; | |
4412 | u_long s; | |
4413 | ||
4414 | scb = (struct scb *)arg; | |
4415 | ahd = scb->ahd_softc; | |
4416 | ahd_lock(ahd, &s); | |
4417 | if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) { | |
4418 | scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM; | |
4419 | up(&ahd->platform_data->eh_sem); | |
4420 | } | |
4421 | ahd_unlock(ahd, &s); | |
4422 | } | |
4423 | ||
4424 | static void | |
4425 | ahd_linux_dev_timed_unfreeze(u_long arg) | |
4426 | { | |
4427 | struct ahd_linux_device *dev; | |
4428 | struct ahd_softc *ahd; | |
4429 | u_long s; | |
4430 | ||
4431 | dev = (struct ahd_linux_device *)arg; | |
4432 | ahd = dev->target->ahd; | |
4433 | ahd_lock(ahd, &s); | |
4434 | dev->flags &= ~AHD_DEV_TIMER_ACTIVE; | |
4435 | if (dev->qfrozen > 0) | |
4436 | dev->qfrozen--; | |
1da177e4 LT |
4437 | if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0 |
4438 | && dev->active == 0) | |
4439 | ahd_linux_free_device(ahd, dev); | |
4440 | ahd_unlock(ahd, &s); | |
4441 | } | |
4442 | ||
1da177e4 LT |
4443 | static int __init |
4444 | ahd_linux_init(void) | |
4445 | { | |
1da177e4 | 4446 | return ahd_linux_detect(&aic79xx_driver_template); |
1da177e4 LT |
4447 | } |
4448 | ||
4449 | static void __exit | |
4450 | ahd_linux_exit(void) | |
4451 | { | |
4452 | struct ahd_softc *ahd; | |
4453 | ||
4454 | /* | |
4455 | * Shutdown DV threads before going into the SCSI mid-layer. | |
4456 | * This avoids situations where the mid-layer locks the entire | |
4457 | * kernel so that waiting for our DV threads to exit leads | |
4458 | * to deadlock. | |
4459 | */ | |
4460 | TAILQ_FOREACH(ahd, &ahd_tailq, links) { | |
4461 | ||
4462 | ahd_linux_kill_dv_thread(ahd); | |
4463 | } | |
4464 | ||
1da177e4 LT |
4465 | ahd_linux_pci_exit(); |
4466 | } | |
4467 | ||
4468 | module_init(ahd_linux_init); | |
4469 | module_exit(ahd_linux_exit); |