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1da177e4 LT |
1 | /* |
2 | * Adaptec AIC7xxx device driver for Linux. | |
3 | * | |
4 | * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $ | |
5 | * | |
6 | * Copyright (c) 1994 John Aycock | |
7 | * The University of Calgary Department of Computer Science. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2, or (at your option) | |
12 | * any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; see the file COPYING. If not, write to | |
21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | * | |
23 | * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F | |
24 | * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA | |
25 | * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide, | |
26 | * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux, | |
27 | * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file | |
28 | * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual, | |
29 | * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the | |
30 | * ANSI SCSI-2 specification (draft 10c), ... | |
31 | * | |
32 | * -------------------------------------------------------------------------- | |
33 | * | |
34 | * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org): | |
35 | * | |
36 | * Substantially modified to include support for wide and twin bus | |
37 | * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes, | |
38 | * SCB paging, and other rework of the code. | |
39 | * | |
40 | * -------------------------------------------------------------------------- | |
41 | * Copyright (c) 1994-2000 Justin T. Gibbs. | |
42 | * Copyright (c) 2000-2001 Adaptec Inc. | |
43 | * All rights reserved. | |
44 | * | |
45 | * Redistribution and use in source and binary forms, with or without | |
46 | * modification, are permitted provided that the following conditions | |
47 | * are met: | |
48 | * 1. Redistributions of source code must retain the above copyright | |
49 | * notice, this list of conditions, and the following disclaimer, | |
50 | * without modification. | |
51 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
52 | * substantially similar to the "NO WARRANTY" disclaimer below | |
53 | * ("Disclaimer") and any redistribution must be conditioned upon | |
54 | * including a substantially similar Disclaimer requirement for further | |
55 | * binary redistribution. | |
56 | * 3. Neither the names of the above-listed copyright holders nor the names | |
57 | * of any contributors may be used to endorse or promote products derived | |
58 | * from this software without specific prior written permission. | |
59 | * | |
60 | * Alternatively, this software may be distributed under the terms of the | |
61 | * GNU General Public License ("GPL") version 2 as published by the Free | |
62 | * Software Foundation. | |
63 | * | |
64 | * NO WARRANTY | |
65 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
66 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
67 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
68 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
69 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
70 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
71 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
72 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
73 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
74 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
75 | * POSSIBILITY OF SUCH DAMAGES. | |
76 | * | |
77 | *--------------------------------------------------------------------------- | |
78 | * | |
79 | * Thanks also go to (in alphabetical order) the following: | |
80 | * | |
81 | * Rory Bolt - Sequencer bug fixes | |
82 | * Jay Estabrook - Initial DEC Alpha support | |
83 | * Doug Ledford - Much needed abort/reset bug fixes | |
84 | * Kai Makisara - DMAing of SCBs | |
85 | * | |
86 | * A Boot time option was also added for not resetting the scsi bus. | |
87 | * | |
88 | * Form: aic7xxx=extended | |
89 | * aic7xxx=no_reset | |
90 | * aic7xxx=verbose | |
91 | * | |
92 | * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97 | |
93 | * | |
94 | * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp | |
95 | */ | |
96 | ||
97 | /* | |
98 | * Further driver modifications made by Doug Ledford <dledford@redhat.com> | |
99 | * | |
100 | * Copyright (c) 1997-1999 Doug Ledford | |
101 | * | |
102 | * These changes are released under the same licensing terms as the FreeBSD | |
103 | * driver written by Justin Gibbs. Please see his Copyright notice above | |
104 | * for the exact terms and conditions covering my changes as well as the | |
105 | * warranty statement. | |
106 | * | |
107 | * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include | |
108 | * but are not limited to: | |
109 | * | |
110 | * 1: Import of the latest FreeBSD sequencer code for this driver | |
111 | * 2: Modification of kernel code to accommodate different sequencer semantics | |
112 | * 3: Extensive changes throughout kernel portion of driver to improve | |
113 | * abort/reset processing and error hanndling | |
114 | * 4: Other work contributed by various people on the Internet | |
115 | * 5: Changes to printk information and verbosity selection code | |
116 | * 6: General reliability related changes, especially in IRQ management | |
117 | * 7: Modifications to the default probe/attach order for supported cards | |
118 | * 8: SMP friendliness has been improved | |
119 | * | |
120 | */ | |
121 | ||
122 | #include "aic7xxx_osm.h" | |
123 | #include "aic7xxx_inline.h" | |
124 | #include <scsi/scsicam.h> | |
92d161c3 JB |
125 | |
126 | static struct scsi_transport_template *ahc_linux_transport_template = NULL; | |
1da177e4 | 127 | |
1da177e4 | 128 | #include <linux/init.h> /* __setup */ |
1da177e4 LT |
129 | #include <linux/mm.h> /* For fetching system memory size */ |
130 | #include <linux/blkdev.h> /* For block_size() */ | |
131 | #include <linux/delay.h> /* For ssleep/msleep */ | |
5a0e3ad6 | 132 | #include <linux/slab.h> |
1da177e4 | 133 | |
1da177e4 | 134 | |
1da177e4 LT |
135 | /* |
136 | * Set this to the delay in seconds after SCSI bus reset. | |
137 | * Note, we honor this only for the initial bus reset. | |
138 | * The scsi error recovery code performs its own bus settle | |
139 | * delay handling for error recovery actions. | |
140 | */ | |
141 | #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS | |
142 | #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS | |
143 | #else | |
144 | #define AIC7XXX_RESET_DELAY 5000 | |
145 | #endif | |
146 | ||
147 | /* | |
148 | * Control collection of SCSI transfer statistics for the /proc filesystem. | |
149 | * | |
150 | * NOTE: Do NOT enable this when running on kernels version 1.2.x and below. | |
151 | * NOTE: This does affect performance since it has to maintain statistics. | |
152 | */ | |
153 | #ifdef CONFIG_AIC7XXX_PROC_STATS | |
154 | #define AIC7XXX_PROC_STATS | |
155 | #endif | |
156 | ||
157 | /* | |
158 | * To change the default number of tagged transactions allowed per-device, | |
159 | * add a line to the lilo.conf file like: | |
160 | * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" | |
161 | * which will result in the first four devices on the first two | |
162 | * controllers being set to a tagged queue depth of 32. | |
163 | * | |
164 | * The tag_commands is an array of 16 to allow for wide and twin adapters. | |
165 | * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 | |
166 | * for channel 1. | |
167 | */ | |
168 | typedef struct { | |
169 | uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ | |
170 | } adapter_tag_info_t; | |
171 | ||
172 | /* | |
173 | * Modify this as you see fit for your system. | |
174 | * | |
175 | * 0 tagged queuing disabled | |
176 | * 1 <= n <= 253 n == max tags ever dispatched. | |
177 | * | |
178 | * The driver will throttle the number of commands dispatched to a | |
179 | * device if it returns queue full. For devices with a fixed maximum | |
180 | * queue depth, the driver will eventually determine this depth and | |
181 | * lock it in (a console message is printed to indicate that a lock | |
182 | * has occurred). On some devices, queue full is returned for a temporary | |
183 | * resource shortage. These devices will return queue full at varying | |
184 | * depths. The driver will throttle back when the queue fulls occur and | |
185 | * attempt to slowly increase the depth over time as the device recovers | |
186 | * from the resource shortage. | |
187 | * | |
188 | * In this example, the first line will disable tagged queueing for all | |
189 | * the devices on the first probed aic7xxx adapter. | |
190 | * | |
191 | * The second line enables tagged queueing with 4 commands/LUN for IDs | |
192 | * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the | |
193 | * driver to attempt to use up to 64 tags for ID 1. | |
194 | * | |
195 | * The third line is the same as the first line. | |
196 | * | |
197 | * The fourth line disables tagged queueing for devices 0 and 3. It | |
198 | * enables tagged queueing for the other IDs, with 16 commands/LUN | |
199 | * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for | |
200 | * IDs 2, 5-7, and 9-15. | |
201 | */ | |
202 | ||
203 | /* | |
204 | * NOTE: The below structure is for reference only, the actual structure | |
205 | * to modify in order to change things is just below this comment block. | |
206 | adapter_tag_info_t aic7xxx_tag_info[] = | |
207 | { | |
208 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
209 | {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, | |
210 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
211 | {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} | |
212 | }; | |
213 | */ | |
214 | ||
215 | #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE | |
216 | #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE | |
217 | #else | |
218 | #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE | |
219 | #endif | |
220 | ||
221 | #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ | |
222 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
223 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
224 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
225 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
226 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
227 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
228 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
229 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ | |
230 | } | |
231 | ||
232 | /* | |
233 | * By default, use the number of commands specified by | |
234 | * the users kernel configuration. | |
235 | */ | |
236 | static adapter_tag_info_t aic7xxx_tag_info[] = | |
237 | { | |
238 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
239 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
240 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
241 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
242 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
243 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
244 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
245 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
246 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
247 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
248 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
249 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
250 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
251 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
252 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
253 | {AIC7XXX_CONFIGED_TAG_COMMANDS} | |
254 | }; | |
255 | ||
1da177e4 LT |
256 | /* |
257 | * There should be a specific return value for this in scsi.h, but | |
258 | * it seems that most drivers ignore it. | |
259 | */ | |
260 | #define DID_UNDERFLOW DID_ERROR | |
261 | ||
262 | void | |
263 | ahc_print_path(struct ahc_softc *ahc, struct scb *scb) | |
264 | { | |
265 | printk("(scsi%d:%c:%d:%d): ", | |
266 | ahc->platform_data->host->host_no, | |
267 | scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', | |
268 | scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, | |
269 | scb != NULL ? SCB_GET_LUN(scb) : -1); | |
270 | } | |
271 | ||
272 | /* | |
273 | * XXX - these options apply unilaterally to _all_ 274x/284x/294x | |
274 | * cards in the system. This should be fixed. Exceptions to this | |
275 | * rule are noted in the comments. | |
276 | */ | |
277 | ||
278 | /* | |
279 | * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This | |
280 | * has no effect on any later resets that might occur due to things like | |
281 | * SCSI bus timeouts. | |
282 | */ | |
283 | static uint32_t aic7xxx_no_reset; | |
284 | ||
1da177e4 LT |
285 | /* |
286 | * Should we force EXTENDED translation on a controller. | |
287 | * 0 == Use whatever is in the SEEPROM or default to off | |
288 | * 1 == Use whatever is in the SEEPROM or default to on | |
289 | */ | |
290 | static uint32_t aic7xxx_extended; | |
291 | ||
292 | /* | |
293 | * PCI bus parity checking of the Adaptec controllers. This is somewhat | |
294 | * dubious at best. To my knowledge, this option has never actually | |
295 | * solved a PCI parity problem, but on certain machines with broken PCI | |
296 | * chipset configurations where stray PCI transactions with bad parity are | |
297 | * the norm rather than the exception, the error messages can be overwelming. | |
298 | * It's included in the driver for completeness. | |
299 | * 0 = Shut off PCI parity check | |
300 | * non-0 = reverse polarity pci parity checking | |
301 | */ | |
302 | static uint32_t aic7xxx_pci_parity = ~0; | |
303 | ||
1da177e4 LT |
304 | /* |
305 | * There are lots of broken chipsets in the world. Some of them will | |
306 | * violate the PCI spec when we issue byte sized memory writes to our | |
307 | * controller. I/O mapped register access, if allowed by the given | |
308 | * platform, will work in almost all cases. | |
309 | */ | |
310 | uint32_t aic7xxx_allow_memio = ~0; | |
311 | ||
1da177e4 LT |
312 | /* |
313 | * So that we can set how long each device is given as a selection timeout. | |
314 | * The table of values goes like this: | |
315 | * 0 - 256ms | |
316 | * 1 - 128ms | |
317 | * 2 - 64ms | |
318 | * 3 - 32ms | |
319 | * We default to 256ms because some older devices need a longer time | |
320 | * to respond to initial selection. | |
321 | */ | |
322 | static uint32_t aic7xxx_seltime; | |
323 | ||
324 | /* | |
325 | * Certain devices do not perform any aging on commands. Should the | |
326 | * device be saturated by commands in one portion of the disk, it is | |
327 | * possible for transactions on far away sectors to never be serviced. | |
328 | * To handle these devices, we can periodically send an ordered tag to | |
329 | * force all outstanding transactions to be serviced prior to a new | |
330 | * transaction. | |
331 | */ | |
289fe5b1 | 332 | static uint32_t aic7xxx_periodic_otag; |
1da177e4 LT |
333 | |
334 | /* | |
335 | * Module information and settable options. | |
336 | */ | |
337 | static char *aic7xxx = NULL; | |
338 | ||
64624d4f HR |
339 | MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); |
340 | MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver"); | |
1da177e4 LT |
341 | MODULE_LICENSE("Dual BSD/GPL"); |
342 | MODULE_VERSION(AIC7XXX_DRIVER_VERSION); | |
343 | module_param(aic7xxx, charp, 0444); | |
344 | MODULE_PARM_DESC(aic7xxx, | |
2b6ee9b5 | 345 | "period-delimited options string:\n" |
1da177e4 LT |
346 | " verbose Enable verbose/diagnostic logging\n" |
347 | " allow_memio Allow device registers to be memory mapped\n" | |
348 | " debug Bitmask of debug values to enable\n" | |
349 | " no_probe Toggle EISA/VLB controller probing\n" | |
350 | " probe_eisa_vl Toggle EISA/VLB controller probing\n" | |
b1c11812 | 351 | " no_reset Suppress initial bus resets\n" |
1da177e4 LT |
352 | " extended Enable extended geometry on all controllers\n" |
353 | " periodic_otag Send an ordered tagged transaction\n" | |
354 | " periodically to prevent tag starvation.\n" | |
355 | " This may be required by some older disk\n" | |
356 | " drives or RAID arrays.\n" | |
1da177e4 LT |
357 | " tag_info:<tag_str> Set per-target tag depth\n" |
358 | " global_tag_depth:<int> Global tag depth for every target\n" | |
359 | " on every bus\n" | |
1da177e4 LT |
360 | " seltime:<int> Selection Timeout\n" |
361 | " (0/256ms,1/128ms,2/64ms,3/32ms)\n" | |
362 | "\n" | |
363 | " Sample /etc/modprobe.conf line:\n" | |
364 | " Toggle EISA/VLB probing\n" | |
365 | " Set tag depth on Controller 1/Target 1 to 10 tags\n" | |
366 | " Shorten the selection timeout to 128ms\n" | |
367 | "\n" | |
368 | " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" | |
369 | ); | |
370 | ||
371 | static void ahc_linux_handle_scsi_status(struct ahc_softc *, | |
b1abb4d6 | 372 | struct scsi_device *, |
1da177e4 LT |
373 | struct scb *); |
374 | static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, | |
013791ee | 375 | struct scsi_cmnd *cmd); |
1da177e4 | 376 | static void ahc_linux_freeze_simq(struct ahc_softc *ahc); |
dacee84b | 377 | static void ahc_linux_release_simq(struct ahc_softc *ahc); |
013791ee | 378 | static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); |
1da177e4 | 379 | static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); |
1da177e4 LT |
380 | static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, |
381 | struct ahc_devinfo *devinfo); | |
b1abb4d6 | 382 | static void ahc_linux_device_queue_depth(struct scsi_device *); |
e4e360c3 JB |
383 | static int ahc_linux_run_command(struct ahc_softc*, |
384 | struct ahc_linux_device *, | |
385 | struct scsi_cmnd *); | |
1da177e4 | 386 | static void ahc_linux_setup_tag_info_global(char *p); |
1da177e4 | 387 | static int aic7xxx_setup(char *s); |
2a40342e CH |
388 | |
389 | static int ahc_linux_unit; | |
390 | ||
1da177e4 | 391 | |
be0d6768 DV |
392 | /************************** OS Utility Wrappers *******************************/ |
393 | void | |
394 | ahc_delay(long usec) | |
395 | { | |
396 | /* | |
397 | * udelay on Linux can have problems for | |
398 | * multi-millisecond waits. Wait at most | |
399 | * 1024us per call. | |
400 | */ | |
401 | while (usec > 0) { | |
402 | udelay(usec % 1024); | |
403 | usec -= 1024; | |
404 | } | |
405 | } | |
406 | ||
407 | /***************************** Low Level I/O **********************************/ | |
408 | uint8_t | |
409 | ahc_inb(struct ahc_softc * ahc, long port) | |
410 | { | |
411 | uint8_t x; | |
412 | ||
413 | if (ahc->tag == BUS_SPACE_MEMIO) { | |
414 | x = readb(ahc->bsh.maddr + port); | |
415 | } else { | |
416 | x = inb(ahc->bsh.ioport + port); | |
417 | } | |
418 | mb(); | |
419 | return (x); | |
420 | } | |
421 | ||
422 | void | |
423 | ahc_outb(struct ahc_softc * ahc, long port, uint8_t val) | |
424 | { | |
425 | if (ahc->tag == BUS_SPACE_MEMIO) { | |
426 | writeb(val, ahc->bsh.maddr + port); | |
427 | } else { | |
428 | outb(val, ahc->bsh.ioport + port); | |
429 | } | |
430 | mb(); | |
431 | } | |
432 | ||
433 | void | |
434 | ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count) | |
435 | { | |
436 | int i; | |
437 | ||
438 | /* | |
439 | * There is probably a more efficient way to do this on Linux | |
440 | * but we don't use this for anything speed critical and this | |
441 | * should work. | |
442 | */ | |
443 | for (i = 0; i < count; i++) | |
444 | ahc_outb(ahc, port, *array++); | |
445 | } | |
446 | ||
447 | void | |
448 | ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count) | |
449 | { | |
450 | int i; | |
451 | ||
452 | /* | |
453 | * There is probably a more efficient way to do this on Linux | |
454 | * but we don't use this for anything speed critical and this | |
455 | * should work. | |
456 | */ | |
457 | for (i = 0; i < count; i++) | |
458 | *array++ = ahc_inb(ahc, port); | |
459 | } | |
460 | ||
1da177e4 | 461 | /********************************* Inlines ************************************/ |
be0d6768 | 462 | static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); |
1da177e4 | 463 | |
be0d6768 | 464 | static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, |
1da177e4 LT |
465 | struct ahc_dma_seg *sg, |
466 | dma_addr_t addr, bus_size_t len); | |
467 | ||
be0d6768 | 468 | static void |
1da177e4 LT |
469 | ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) |
470 | { | |
013791ee | 471 | struct scsi_cmnd *cmd; |
1da177e4 LT |
472 | |
473 | cmd = scb->io_ctx; | |
474 | ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); | |
3a57c4a5 FT |
475 | |
476 | scsi_dma_unmap(cmd); | |
1da177e4 LT |
477 | } |
478 | ||
be0d6768 | 479 | static int |
1da177e4 LT |
480 | ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, |
481 | struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) | |
482 | { | |
483 | int consumed; | |
484 | ||
485 | if ((scb->sg_count + 1) > AHC_NSEG) | |
486 | panic("Too few segs for dma mapping. " | |
487 | "Increase AHC_NSEG\n"); | |
488 | ||
489 | consumed = 1; | |
490 | sg->addr = ahc_htole32(addr & 0xFFFFFFFF); | |
491 | scb->platform_data->xfer_len += len; | |
492 | ||
493 | if (sizeof(dma_addr_t) > 4 | |
494 | && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) | |
495 | len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; | |
496 | ||
497 | sg->len = ahc_htole32(len); | |
498 | return (consumed); | |
499 | } | |
500 | ||
1da177e4 LT |
501 | /* |
502 | * Return a string describing the driver. | |
503 | */ | |
504 | static const char * | |
505 | ahc_linux_info(struct Scsi_Host *host) | |
506 | { | |
507 | static char buffer[512]; | |
508 | char ahc_info[256]; | |
509 | char *bp; | |
510 | struct ahc_softc *ahc; | |
511 | ||
512 | bp = &buffer[0]; | |
513 | ahc = *(struct ahc_softc **)host->hostdata; | |
514 | memset(bp, 0, sizeof(buffer)); | |
980b306a DV |
515 | strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n" |
516 | " <"); | |
1da177e4 | 517 | strcat(bp, ahc->description); |
980b306a DV |
518 | strcat(bp, ">\n" |
519 | " "); | |
1da177e4 LT |
520 | ahc_controller_info(ahc, ahc_info); |
521 | strcat(bp, ahc_info); | |
522 | strcat(bp, "\n"); | |
523 | ||
524 | return (bp); | |
525 | } | |
526 | ||
527 | /* | |
528 | * Queue an SCB to the controller. | |
529 | */ | |
530 | static int | |
013791ee | 531 | ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) |
1da177e4 LT |
532 | { |
533 | struct ahc_softc *ahc; | |
b1abb4d6 | 534 | struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); |
6d5e9fd1 CH |
535 | int rtn = SCSI_MLQUEUE_HOST_BUSY; |
536 | unsigned long flags; | |
1da177e4 LT |
537 | |
538 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
539 | ||
6d5e9fd1 CH |
540 | ahc_lock(ahc, &flags); |
541 | if (ahc->platform_data->qfrozen == 0) { | |
542 | cmd->scsi_done = scsi_done; | |
543 | cmd->result = CAM_REQ_INPROG << 16; | |
544 | rtn = ahc_linux_run_command(ahc, dev, cmd); | |
545 | } | |
546 | ahc_unlock(ahc, &flags); | |
e4e360c3 | 547 | |
6d5e9fd1 | 548 | return rtn; |
1da177e4 LT |
549 | } |
550 | ||
b1abb4d6 JB |
551 | static inline struct scsi_target ** |
552 | ahc_linux_target_in_softc(struct scsi_target *starget) | |
1da177e4 | 553 | { |
b1abb4d6 JB |
554 | struct ahc_softc *ahc = |
555 | *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); | |
fb3089df | 556 | unsigned int target_offset; |
b1abb4d6 JB |
557 | |
558 | target_offset = starget->id; | |
559 | if (starget->channel != 0) | |
560 | target_offset += 8; | |
561 | ||
562 | return &ahc->platform_data->starget[target_offset]; | |
563 | } | |
564 | ||
565 | static int | |
566 | ahc_linux_target_alloc(struct scsi_target *starget) | |
567 | { | |
568 | struct ahc_softc *ahc = | |
569 | *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); | |
570 | struct seeprom_config *sc = ahc->seep_config; | |
fb3089df | 571 | unsigned long flags; |
b1abb4d6 | 572 | struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); |
b1abb4d6 JB |
573 | unsigned short scsirate; |
574 | struct ahc_devinfo devinfo; | |
575 | struct ahc_initiator_tinfo *tinfo; | |
576 | struct ahc_tmode_tstate *tstate; | |
577 | char channel = starget->channel + 'A'; | |
578 | unsigned int our_id = ahc->our_id; | |
579 | unsigned int target_offset; | |
c7525233 JB |
580 | |
581 | target_offset = starget->id; | |
582 | if (starget->channel != 0) | |
583 | target_offset += 8; | |
b1abb4d6 JB |
584 | |
585 | if (starget->channel) | |
586 | our_id = ahc->our_id_b; | |
1da177e4 | 587 | |
fb3089df | 588 | ahc_lock(ahc, &flags); |
fb3089df | 589 | |
b1abb4d6 | 590 | BUG_ON(*ahc_targp != NULL); |
c7525233 | 591 | |
b1abb4d6 | 592 | *ahc_targp = starget; |
c7525233 | 593 | |
b1abb4d6 | 594 | if (sc) { |
12021fff JB |
595 | int maxsync = AHC_SYNCRATE_DT; |
596 | int ultra = 0; | |
597 | int flags = sc->device_flags[target_offset]; | |
598 | ||
599 | if (ahc->flags & AHC_NEWEEPROM_FMT) { | |
600 | if (flags & CFSYNCHISULTRA) | |
601 | ultra = 1; | |
602 | } else if (flags & CFULTRAEN) | |
603 | ultra = 1; | |
604 | /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 | |
605 | * change it to ultra=0, CFXFER = 0 */ | |
606 | if(ultra && (flags & CFXFER) == 0x04) { | |
607 | ultra = 0; | |
608 | flags &= ~CFXFER; | |
609 | } | |
610 | ||
b1abb4d6 | 611 | if ((ahc->features & AHC_ULTRA2) != 0) { |
12021fff | 612 | scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); |
b1abb4d6 | 613 | } else { |
12021fff JB |
614 | scsirate = (flags & CFXFER) << 4; |
615 | maxsync = ultra ? AHC_SYNCRATE_ULTRA : | |
616 | AHC_SYNCRATE_FAST; | |
c7525233 | 617 | } |
12021fff JB |
618 | spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; |
619 | if (!(flags & CFSYNCH)) | |
620 | spi_max_offset(starget) = 0; | |
b1abb4d6 | 621 | spi_min_period(starget) = |
12021fff JB |
622 | ahc_find_period(ahc, scsirate, maxsync); |
623 | ||
b1abb4d6 JB |
624 | tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, |
625 | starget->id, &tstate); | |
c7525233 | 626 | } |
b1abb4d6 JB |
627 | ahc_compile_devinfo(&devinfo, our_id, starget->id, |
628 | CAM_LUN_WILDCARD, channel, | |
629 | ROLE_INITIATOR); | |
630 | ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, | |
631 | AHC_TRANS_GOAL, /*paused*/FALSE); | |
632 | ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, | |
633 | AHC_TRANS_GOAL, /*paused*/FALSE); | |
fb3089df | 634 | ahc_unlock(ahc, &flags); |
b1abb4d6 JB |
635 | |
636 | return 0; | |
637 | } | |
638 | ||
639 | static void | |
640 | ahc_linux_target_destroy(struct scsi_target *starget) | |
641 | { | |
642 | struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); | |
643 | ||
644 | *ahc_targp = NULL; | |
645 | } | |
646 | ||
647 | static int | |
648 | ahc_linux_slave_alloc(struct scsi_device *sdev) | |
649 | { | |
650 | struct ahc_softc *ahc = | |
651 | *((struct ahc_softc **)sdev->host->hostdata); | |
652 | struct scsi_target *starget = sdev->sdev_target; | |
b1abb4d6 JB |
653 | struct ahc_linux_device *dev; |
654 | ||
655 | if (bootverbose) | |
48813cf9 | 656 | printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); |
b1abb4d6 | 657 | |
b1abb4d6 JB |
658 | dev = scsi_transport_device_data(sdev); |
659 | memset(dev, 0, sizeof(*dev)); | |
660 | ||
661 | /* | |
662 | * We start out life using untagged | |
663 | * transactions of which we allow one. | |
664 | */ | |
665 | dev->openings = 1; | |
666 | ||
667 | /* | |
668 | * Set maxtags to 0. This will be changed if we | |
669 | * later determine that we are dealing with | |
670 | * a tagged queuing capable device. | |
671 | */ | |
672 | dev->maxtags = 0; | |
673 | ||
79778a27 JB |
674 | spi_period(starget) = 0; |
675 | ||
b1abb4d6 | 676 | return 0; |
1da177e4 LT |
677 | } |
678 | ||
679 | static int | |
b1abb4d6 | 680 | ahc_linux_slave_configure(struct scsi_device *sdev) |
1da177e4 LT |
681 | { |
682 | struct ahc_softc *ahc; | |
1da177e4 | 683 | |
b1abb4d6 | 684 | ahc = *((struct ahc_softc **)sdev->host->hostdata); |
c7525233 | 685 | |
1da177e4 | 686 | if (bootverbose) |
017560fc | 687 | sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); |
c7525233 | 688 | |
b1abb4d6 | 689 | ahc_linux_device_queue_depth(sdev); |
cb624029 JB |
690 | |
691 | /* Initial Domain Validation */ | |
b1abb4d6 JB |
692 | if (!spi_initial_dv(sdev->sdev_target)) |
693 | spi_dv_device(sdev); | |
cb624029 | 694 | |
c7525233 | 695 | return 0; |
1da177e4 LT |
696 | } |
697 | ||
1da177e4 LT |
698 | #if defined(__i386__) |
699 | /* | |
700 | * Return the disk geometry for the given SCSI device. | |
701 | */ | |
702 | static int | |
1da177e4 LT |
703 | ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
704 | sector_t capacity, int geom[]) | |
705 | { | |
706 | uint8_t *bh; | |
1da177e4 LT |
707 | int heads; |
708 | int sectors; | |
709 | int cylinders; | |
710 | int ret; | |
711 | int extended; | |
712 | struct ahc_softc *ahc; | |
713 | u_int channel; | |
714 | ||
715 | ahc = *((struct ahc_softc **)sdev->host->hostdata); | |
422c0d61 | 716 | channel = sdev_channel(sdev); |
1da177e4 | 717 | |
1da177e4 | 718 | bh = scsi_bios_ptable(bdev); |
1da177e4 LT |
719 | if (bh) { |
720 | ret = scsi_partsize(bh, capacity, | |
721 | &geom[2], &geom[0], &geom[1]); | |
1da177e4 | 722 | kfree(bh); |
1da177e4 LT |
723 | if (ret != -1) |
724 | return (ret); | |
725 | } | |
726 | heads = 64; | |
727 | sectors = 32; | |
728 | cylinders = aic_sector_div(capacity, heads, sectors); | |
729 | ||
730 | if (aic7xxx_extended != 0) | |
731 | extended = 1; | |
732 | else if (channel == 0) | |
733 | extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; | |
734 | else | |
735 | extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; | |
736 | if (extended && cylinders >= 1024) { | |
737 | heads = 255; | |
738 | sectors = 63; | |
739 | cylinders = aic_sector_div(capacity, heads, sectors); | |
740 | } | |
741 | geom[0] = heads; | |
742 | geom[1] = sectors; | |
743 | geom[2] = cylinders; | |
744 | return (0); | |
745 | } | |
746 | #endif | |
747 | ||
748 | /* | |
749 | * Abort the current SCSI command(s). | |
750 | */ | |
751 | static int | |
013791ee | 752 | ahc_linux_abort(struct scsi_cmnd *cmd) |
1da177e4 LT |
753 | { |
754 | int error; | |
755 | ||
756 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); | |
757 | if (error != 0) | |
48813cf9 | 758 | printk("aic7xxx_abort returns 0x%x\n", error); |
1da177e4 LT |
759 | return (error); |
760 | } | |
761 | ||
762 | /* | |
763 | * Attempt to send a target reset message to the device that timed out. | |
764 | */ | |
765 | static int | |
013791ee | 766 | ahc_linux_dev_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
767 | { |
768 | int error; | |
769 | ||
770 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); | |
771 | if (error != 0) | |
48813cf9 | 772 | printk("aic7xxx_dev_reset returns 0x%x\n", error); |
1da177e4 LT |
773 | return (error); |
774 | } | |
775 | ||
776 | /* | |
777 | * Reset the SCSI bus. | |
778 | */ | |
779 | static int | |
013791ee | 780 | ahc_linux_bus_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
781 | { |
782 | struct ahc_softc *ahc; | |
1da177e4 | 783 | int found; |
68b3aa7c | 784 | unsigned long flags; |
1da177e4 LT |
785 | |
786 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
68b3aa7c JG |
787 | |
788 | ahc_lock(ahc, &flags); | |
422c0d61 | 789 | found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', |
1da177e4 | 790 | /*initiate reset*/TRUE); |
68b3aa7c | 791 | ahc_unlock(ahc, &flags); |
1da177e4 LT |
792 | |
793 | if (bootverbose) | |
48813cf9 | 794 | printk("%s: SCSI bus reset delivered. " |
1da177e4 LT |
795 | "%d SCBs aborted.\n", ahc_name(ahc), found); |
796 | ||
797 | return SUCCESS; | |
798 | } | |
799 | ||
013791ee | 800 | struct scsi_host_template aic7xxx_driver_template = { |
1da177e4 LT |
801 | .module = THIS_MODULE, |
802 | .name = "aic7xxx", | |
dfd287f6 | 803 | .proc_name = "aic7xxx", |
1da177e4 LT |
804 | .proc_info = ahc_linux_proc_info, |
805 | .info = ahc_linux_info, | |
806 | .queuecommand = ahc_linux_queue, | |
807 | .eh_abort_handler = ahc_linux_abort, | |
808 | .eh_device_reset_handler = ahc_linux_dev_reset, | |
809 | .eh_bus_reset_handler = ahc_linux_bus_reset, | |
810 | #if defined(__i386__) | |
811 | .bios_param = ahc_linux_biosparam, | |
812 | #endif | |
813 | .can_queue = AHC_MAX_QUEUE, | |
814 | .this_id = -1, | |
80f1443c | 815 | .max_sectors = 8192, |
1da177e4 LT |
816 | .cmd_per_lun = 2, |
817 | .use_clustering = ENABLE_CLUSTERING, | |
818 | .slave_alloc = ahc_linux_slave_alloc, | |
819 | .slave_configure = ahc_linux_slave_configure, | |
b1abb4d6 JB |
820 | .target_alloc = ahc_linux_target_alloc, |
821 | .target_destroy = ahc_linux_target_destroy, | |
1da177e4 LT |
822 | }; |
823 | ||
824 | /**************************** Tasklet Handler *********************************/ | |
825 | ||
1da177e4 LT |
826 | /******************************** Macros **************************************/ |
827 | #define BUILD_SCSIID(ahc, cmd) \ | |
828 | ((((cmd)->device->id << TID_SHIFT) & TID) \ | |
829 | | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ | |
830 | | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) | |
831 | ||
832 | /******************************** Bus DMA *************************************/ | |
833 | int | |
834 | ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, | |
835 | bus_size_t alignment, bus_size_t boundary, | |
836 | dma_addr_t lowaddr, dma_addr_t highaddr, | |
837 | bus_dma_filter_t *filter, void *filterarg, | |
838 | bus_size_t maxsize, int nsegments, | |
839 | bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) | |
840 | { | |
841 | bus_dma_tag_t dmat; | |
842 | ||
48813cf9 | 843 | dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); |
1da177e4 LT |
844 | if (dmat == NULL) |
845 | return (ENOMEM); | |
846 | ||
847 | /* | |
848 | * Linux is very simplistic about DMA memory. For now don't | |
849 | * maintain all specification information. Once Linux supplies | |
850 | * better facilities for doing these operations, or the | |
851 | * needs of this particular driver change, we might need to do | |
852 | * more here. | |
853 | */ | |
854 | dmat->alignment = alignment; | |
855 | dmat->boundary = boundary; | |
856 | dmat->maxsize = maxsize; | |
857 | *ret_tag = dmat; | |
858 | return (0); | |
859 | } | |
860 | ||
861 | void | |
862 | ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) | |
863 | { | |
48813cf9 | 864 | kfree(dmat); |
1da177e4 LT |
865 | } |
866 | ||
867 | int | |
868 | ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, | |
869 | int flags, bus_dmamap_t *mapp) | |
870 | { | |
1da177e4 | 871 | *vaddr = pci_alloc_consistent(ahc->dev_softc, |
7dfa0f26 | 872 | dmat->maxsize, mapp); |
1da177e4 | 873 | if (*vaddr == NULL) |
7dfa0f26 CH |
874 | return ENOMEM; |
875 | return 0; | |
1da177e4 LT |
876 | } |
877 | ||
878 | void | |
879 | ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, | |
880 | void* vaddr, bus_dmamap_t map) | |
881 | { | |
882 | pci_free_consistent(ahc->dev_softc, dmat->maxsize, | |
7dfa0f26 | 883 | vaddr, map); |
1da177e4 LT |
884 | } |
885 | ||
886 | int | |
887 | ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, | |
888 | void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, | |
889 | void *cb_arg, int flags) | |
890 | { | |
891 | /* | |
892 | * Assume for now that this will only be used during | |
893 | * initialization and not for per-transaction buffer mapping. | |
894 | */ | |
895 | bus_dma_segment_t stack_sg; | |
896 | ||
7dfa0f26 | 897 | stack_sg.ds_addr = map; |
1da177e4 LT |
898 | stack_sg.ds_len = dmat->maxsize; |
899 | cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); | |
900 | return (0); | |
901 | } | |
902 | ||
903 | void | |
904 | ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | |
905 | { | |
1da177e4 LT |
906 | } |
907 | ||
908 | int | |
909 | ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | |
910 | { | |
911 | /* Nothing to do */ | |
912 | return (0); | |
913 | } | |
914 | ||
1da177e4 LT |
915 | static void |
916 | ahc_linux_setup_tag_info_global(char *p) | |
917 | { | |
918 | int tags, i, j; | |
919 | ||
920 | tags = simple_strtoul(p + 1, NULL, 0) & 0xff; | |
48813cf9 | 921 | printk("Setting Global Tags= %d\n", tags); |
1da177e4 | 922 | |
6391a113 | 923 | for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { |
1da177e4 LT |
924 | for (j = 0; j < AHC_NUM_TARGETS; j++) { |
925 | aic7xxx_tag_info[i].tag_commands[j] = tags; | |
926 | } | |
927 | } | |
928 | } | |
929 | ||
930 | static void | |
931 | ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) | |
932 | { | |
933 | ||
934 | if ((instance >= 0) && (targ >= 0) | |
6391a113 | 935 | && (instance < ARRAY_SIZE(aic7xxx_tag_info)) |
1da177e4 LT |
936 | && (targ < AHC_NUM_TARGETS)) { |
937 | aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; | |
938 | if (bootverbose) | |
48813cf9 | 939 | printk("tag_info[%d:%d] = %d\n", instance, targ, value); |
1da177e4 LT |
940 | } |
941 | } | |
942 | ||
1ff92730 CH |
943 | static char * |
944 | ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, | |
945 | void (*callback)(u_long, int, int, int32_t), | |
946 | u_long callback_arg) | |
947 | { | |
948 | char *tok_end; | |
949 | char *tok_end2; | |
950 | int i; | |
951 | int instance; | |
952 | int targ; | |
953 | int done; | |
954 | char tok_list[] = {'.', ',', '{', '}', '\0'}; | |
955 | ||
956 | /* All options use a ':' name/arg separator */ | |
957 | if (*opt_arg != ':') | |
958 | return (opt_arg); | |
959 | opt_arg++; | |
960 | instance = -1; | |
961 | targ = -1; | |
962 | done = FALSE; | |
963 | /* | |
964 | * Restore separator that may be in | |
965 | * the middle of our option argument. | |
966 | */ | |
967 | tok_end = strchr(opt_arg, '\0'); | |
968 | if (tok_end < end) | |
969 | *tok_end = ','; | |
970 | while (!done) { | |
971 | switch (*opt_arg) { | |
972 | case '{': | |
973 | if (instance == -1) { | |
974 | instance = 0; | |
975 | } else { | |
976 | if (depth > 1) { | |
977 | if (targ == -1) | |
978 | targ = 0; | |
979 | } else { | |
48813cf9 | 980 | printk("Malformed Option %s\n", |
1ff92730 CH |
981 | opt_name); |
982 | done = TRUE; | |
983 | } | |
984 | } | |
985 | opt_arg++; | |
986 | break; | |
987 | case '}': | |
988 | if (targ != -1) | |
989 | targ = -1; | |
990 | else if (instance != -1) | |
991 | instance = -1; | |
992 | opt_arg++; | |
993 | break; | |
994 | case ',': | |
995 | case '.': | |
996 | if (instance == -1) | |
997 | done = TRUE; | |
998 | else if (targ >= 0) | |
999 | targ++; | |
1000 | else if (instance >= 0) | |
1001 | instance++; | |
1002 | opt_arg++; | |
1003 | break; | |
1004 | case '\0': | |
1005 | done = TRUE; | |
1006 | break; | |
1007 | default: | |
1008 | tok_end = end; | |
1009 | for (i = 0; tok_list[i]; i++) { | |
1010 | tok_end2 = strchr(opt_arg, tok_list[i]); | |
1011 | if ((tok_end2) && (tok_end2 < tok_end)) | |
1012 | tok_end = tok_end2; | |
1013 | } | |
1014 | callback(callback_arg, instance, targ, | |
1015 | simple_strtol(opt_arg, NULL, 0)); | |
1016 | opt_arg = tok_end; | |
1017 | break; | |
1018 | } | |
1019 | } | |
1020 | return (opt_arg); | |
1021 | } | |
1022 | ||
1da177e4 LT |
1023 | /* |
1024 | * Handle Linux boot parameters. This routine allows for assigning a value | |
1025 | * to a parameter with a ':' between the parameter and the value. | |
1026 | * ie. aic7xxx=stpwlev:1,extended | |
1027 | */ | |
1028 | static int | |
1029 | aic7xxx_setup(char *s) | |
1030 | { | |
1031 | int i, n; | |
1032 | char *p; | |
1033 | char *end; | |
1034 | ||
980b306a | 1035 | static const struct { |
1da177e4 LT |
1036 | const char *name; |
1037 | uint32_t *flag; | |
1038 | } options[] = { | |
1039 | { "extended", &aic7xxx_extended }, | |
1040 | { "no_reset", &aic7xxx_no_reset }, | |
1041 | { "verbose", &aic7xxx_verbose }, | |
1042 | { "allow_memio", &aic7xxx_allow_memio}, | |
1043 | #ifdef AHC_DEBUG | |
1044 | { "debug", &ahc_debug }, | |
1045 | #endif | |
1da177e4 LT |
1046 | { "periodic_otag", &aic7xxx_periodic_otag }, |
1047 | { "pci_parity", &aic7xxx_pci_parity }, | |
1048 | { "seltime", &aic7xxx_seltime }, | |
1049 | { "tag_info", NULL }, | |
1050 | { "global_tag_depth", NULL }, | |
1051 | { "dv", NULL } | |
1052 | }; | |
1053 | ||
1054 | end = strchr(s, '\0'); | |
1055 | ||
1056 | /* | |
6391a113 | 1057 | * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE |
1da177e4 LT |
1058 | * will never be 0 in this case. |
1059 | */ | |
1060 | n = 0; | |
1061 | ||
1062 | while ((p = strsep(&s, ",.")) != NULL) { | |
1063 | if (*p == '\0') | |
1064 | continue; | |
6391a113 | 1065 | for (i = 0; i < ARRAY_SIZE(options); i++) { |
1da177e4 LT |
1066 | |
1067 | n = strlen(options[i].name); | |
1068 | if (strncmp(options[i].name, p, n) == 0) | |
1069 | break; | |
1070 | } | |
6391a113 | 1071 | if (i == ARRAY_SIZE(options)) |
1da177e4 LT |
1072 | continue; |
1073 | ||
1074 | if (strncmp(p, "global_tag_depth", n) == 0) { | |
1075 | ahc_linux_setup_tag_info_global(p + n); | |
1076 | } else if (strncmp(p, "tag_info", n) == 0) { | |
1ff92730 | 1077 | s = ahc_parse_brace_option("tag_info", p + n, end, |
1da177e4 | 1078 | 2, ahc_linux_setup_tag_info, 0); |
1da177e4 LT |
1079 | } else if (p[n] == ':') { |
1080 | *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); | |
1081 | } else if (strncmp(p, "verbose", n) == 0) { | |
1082 | *(options[i].flag) = 1; | |
1083 | } else { | |
1084 | *(options[i].flag) ^= 0xFFFFFFFF; | |
1085 | } | |
1086 | } | |
1087 | return 1; | |
1088 | } | |
1089 | ||
1090 | __setup("aic7xxx=", aic7xxx_setup); | |
1091 | ||
1092 | uint32_t aic7xxx_verbose; | |
1093 | ||
1094 | int | |
013791ee | 1095 | ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) |
1da177e4 | 1096 | { |
9e1fe931 JJ |
1097 | char buf[80]; |
1098 | struct Scsi_Host *host; | |
1da177e4 | 1099 | char *new_name; |
9e1fe931 JJ |
1100 | u_long s; |
1101 | int retval; | |
1da177e4 LT |
1102 | |
1103 | template->name = ahc->description; | |
1104 | host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); | |
1105 | if (host == NULL) | |
1106 | return (ENOMEM); | |
1107 | ||
1108 | *((struct ahc_softc **)host->hostdata) = ahc; | |
1da177e4 LT |
1109 | ahc->platform_data->host = host; |
1110 | host->can_queue = AHC_MAX_QUEUE; | |
1111 | host->cmd_per_lun = 2; | |
1112 | /* XXX No way to communicate the ID for multiple channels */ | |
1113 | host->this_id = ahc->our_id; | |
1114 | host->irq = ahc->platform_data->irq; | |
1115 | host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; | |
1116 | host->max_lun = AHC_NUM_LUNS; | |
1117 | host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; | |
1118 | host->sg_tablesize = AHC_NSEG; | |
dacee84b | 1119 | ahc_lock(ahc, &s); |
2a40342e | 1120 | ahc_set_unit(ahc, ahc_linux_unit++); |
dacee84b | 1121 | ahc_unlock(ahc, &s); |
1da177e4 | 1122 | sprintf(buf, "scsi%d", host->host_no); |
48813cf9 | 1123 | new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); |
1da177e4 LT |
1124 | if (new_name != NULL) { |
1125 | strcpy(new_name, buf); | |
1126 | ahc_set_name(ahc, new_name); | |
1127 | } | |
1128 | host->unique_id = ahc->unit; | |
1da177e4 | 1129 | ahc_linux_initialize_scsi_bus(ahc); |
1da177e4 | 1130 | ahc_intr_enable(ahc, TRUE); |
1da177e4 | 1131 | |
92d161c3 JB |
1132 | host->transportt = ahc_linux_transport_template; |
1133 | ||
9e1fe931 JJ |
1134 | retval = scsi_add_host(host, |
1135 | (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); | |
1136 | if (retval) { | |
1137 | printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); | |
1138 | scsi_host_put(host); | |
1139 | return retval; | |
1140 | } | |
1141 | ||
1da177e4 | 1142 | scsi_scan_host(host); |
9e1fe931 | 1143 | return 0; |
1da177e4 LT |
1144 | } |
1145 | ||
1da177e4 LT |
1146 | /* |
1147 | * Place the SCSI bus into a known state by either resetting it, | |
1148 | * or forcing transfer negotiations on the next command to any | |
1149 | * target. | |
1150 | */ | |
1151 | void | |
1152 | ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) | |
1153 | { | |
1154 | int i; | |
1155 | int numtarg; | |
dacee84b | 1156 | unsigned long s; |
1da177e4 LT |
1157 | |
1158 | i = 0; | |
1159 | numtarg = 0; | |
1160 | ||
dacee84b JB |
1161 | ahc_lock(ahc, &s); |
1162 | ||
1da177e4 LT |
1163 | if (aic7xxx_no_reset != 0) |
1164 | ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); | |
1165 | ||
1166 | if ((ahc->flags & AHC_RESET_BUS_A) != 0) | |
1167 | ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); | |
1168 | else | |
1169 | numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; | |
1170 | ||
1171 | if ((ahc->features & AHC_TWIN) != 0) { | |
1172 | ||
1173 | if ((ahc->flags & AHC_RESET_BUS_B) != 0) { | |
1174 | ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); | |
1175 | } else { | |
1176 | if (numtarg == 0) | |
1177 | i = 8; | |
1178 | numtarg += 8; | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | /* | |
1183 | * Force negotiation to async for all targets that | |
1184 | * will not see an initial bus reset. | |
1185 | */ | |
1186 | for (; i < numtarg; i++) { | |
1187 | struct ahc_devinfo devinfo; | |
1188 | struct ahc_initiator_tinfo *tinfo; | |
1189 | struct ahc_tmode_tstate *tstate; | |
1190 | u_int our_id; | |
1191 | u_int target_id; | |
1192 | char channel; | |
1193 | ||
1194 | channel = 'A'; | |
1195 | our_id = ahc->our_id; | |
1196 | target_id = i; | |
1197 | if (i > 7 && (ahc->features & AHC_TWIN) != 0) { | |
1198 | channel = 'B'; | |
1199 | our_id = ahc->our_id_b; | |
1200 | target_id = i % 8; | |
1201 | } | |
1202 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, | |
1203 | target_id, &tstate); | |
1204 | ahc_compile_devinfo(&devinfo, our_id, target_id, | |
1205 | CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); | |
1206 | ahc_update_neg_request(ahc, &devinfo, tstate, | |
1207 | tinfo, AHC_NEG_ALWAYS); | |
1208 | } | |
dacee84b | 1209 | ahc_unlock(ahc, &s); |
1da177e4 LT |
1210 | /* Give the bus some time to recover */ |
1211 | if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { | |
1212 | ahc_linux_freeze_simq(ahc); | |
dacee84b JB |
1213 | msleep(AIC7XXX_RESET_DELAY); |
1214 | ahc_linux_release_simq(ahc); | |
1da177e4 LT |
1215 | } |
1216 | } | |
1217 | ||
1218 | int | |
1219 | ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) | |
1220 | { | |
1221 | ||
1222 | ahc->platform_data = | |
48813cf9 | 1223 | kmalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC); |
1da177e4 LT |
1224 | if (ahc->platform_data == NULL) |
1225 | return (ENOMEM); | |
1226 | memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); | |
1da177e4 | 1227 | ahc->platform_data->irq = AHC_LINUX_NOIRQ; |
1da177e4 | 1228 | ahc_lockinit(ahc); |
1da177e4 LT |
1229 | ahc->seltime = (aic7xxx_seltime & 0x3) << 4; |
1230 | ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; | |
1231 | if (aic7xxx_pci_parity == 0) | |
1232 | ahc->flags |= AHC_DISABLE_PCI_PERR; | |
1233 | ||
1234 | return (0); | |
1235 | } | |
1236 | ||
1237 | void | |
1238 | ahc_platform_free(struct ahc_softc *ahc) | |
1239 | { | |
b1abb4d6 | 1240 | struct scsi_target *starget; |
9080063f | 1241 | int i; |
1da177e4 LT |
1242 | |
1243 | if (ahc->platform_data != NULL) { | |
1da177e4 LT |
1244 | /* destroy all of the device and target objects */ |
1245 | for (i = 0; i < AHC_NUM_TARGETS; i++) { | |
b1abb4d6 JB |
1246 | starget = ahc->platform_data->starget[i]; |
1247 | if (starget != NULL) { | |
b1abb4d6 | 1248 | ahc->platform_data->starget[i] = NULL; |
1da177e4 LT |
1249 | } |
1250 | } | |
1251 | ||
1252 | if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) | |
1253 | free_irq(ahc->platform_data->irq, ahc); | |
1254 | if (ahc->tag == BUS_SPACE_PIO | |
1255 | && ahc->bsh.ioport != 0) | |
1256 | release_region(ahc->bsh.ioport, 256); | |
1257 | if (ahc->tag == BUS_SPACE_MEMIO | |
1258 | && ahc->bsh.maddr != NULL) { | |
1259 | iounmap(ahc->bsh.maddr); | |
1260 | release_mem_region(ahc->platform_data->mem_busaddr, | |
1261 | 0x1000); | |
1262 | } | |
dedd8310 | 1263 | |
97af50f6 JB |
1264 | if (ahc->platform_data->host) |
1265 | scsi_host_put(ahc->platform_data->host); | |
1266 | ||
48813cf9 | 1267 | kfree(ahc->platform_data); |
1da177e4 LT |
1268 | } |
1269 | } | |
1270 | ||
1271 | void | |
1272 | ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) | |
1273 | { | |
1274 | ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), | |
1275 | SCB_GET_CHANNEL(ahc, scb), | |
1276 | SCB_GET_LUN(scb), SCB_LIST_NULL, | |
1277 | ROLE_UNKNOWN, CAM_REQUEUE_REQ); | |
1278 | } | |
1279 | ||
1280 | void | |
9080063f HR |
1281 | ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, |
1282 | struct ahc_devinfo *devinfo, ahc_queue_alg alg) | |
1da177e4 LT |
1283 | { |
1284 | struct ahc_linux_device *dev; | |
1285 | int was_queuing; | |
1286 | int now_queuing; | |
1287 | ||
b1abb4d6 | 1288 | if (sdev == NULL) |
1da177e4 | 1289 | return; |
b1abb4d6 JB |
1290 | dev = scsi_transport_device_data(sdev); |
1291 | ||
1da177e4 LT |
1292 | was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); |
1293 | switch (alg) { | |
1294 | default: | |
1295 | case AHC_QUEUE_NONE: | |
1296 | now_queuing = 0; | |
1297 | break; | |
1298 | case AHC_QUEUE_BASIC: | |
1299 | now_queuing = AHC_DEV_Q_BASIC; | |
1300 | break; | |
1301 | case AHC_QUEUE_TAGGED: | |
1302 | now_queuing = AHC_DEV_Q_TAGGED; | |
1303 | break; | |
1304 | } | |
1305 | if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 | |
1306 | && (was_queuing != now_queuing) | |
1307 | && (dev->active != 0)) { | |
1308 | dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; | |
1309 | dev->qfrozen++; | |
1310 | } | |
1311 | ||
1312 | dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); | |
1313 | if (now_queuing) { | |
1314 | u_int usertags; | |
1315 | ||
1316 | usertags = ahc_linux_user_tagdepth(ahc, devinfo); | |
1317 | if (!was_queuing) { | |
1318 | /* | |
1319 | * Start out agressively and allow our | |
1320 | * dynamic queue depth algorithm to take | |
1321 | * care of the rest. | |
1322 | */ | |
1323 | dev->maxtags = usertags; | |
1324 | dev->openings = dev->maxtags - dev->active; | |
1325 | } | |
1326 | if (dev->maxtags == 0) { | |
1327 | /* | |
1328 | * Queueing is disabled by the user. | |
1329 | */ | |
1330 | dev->openings = 1; | |
1331 | } else if (alg == AHC_QUEUE_TAGGED) { | |
1332 | dev->flags |= AHC_DEV_Q_TAGGED; | |
1333 | if (aic7xxx_periodic_otag != 0) | |
1334 | dev->flags |= AHC_DEV_PERIODIC_OTAG; | |
1335 | } else | |
1336 | dev->flags |= AHC_DEV_Q_BASIC; | |
1337 | } else { | |
1338 | /* We can only have one opening. */ | |
1339 | dev->maxtags = 0; | |
1340 | dev->openings = 1 - dev->active; | |
1341 | } | |
b1abb4d6 JB |
1342 | switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { |
1343 | case AHC_DEV_Q_BASIC: | |
fdd0edf2 JB |
1344 | scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); |
1345 | scsi_activate_tcq(sdev, dev->openings + dev->active); | |
b1abb4d6 JB |
1346 | break; |
1347 | case AHC_DEV_Q_TAGGED: | |
fdd0edf2 JB |
1348 | scsi_set_tag_type(sdev, MSG_ORDERED_TAG); |
1349 | scsi_activate_tcq(sdev, dev->openings + dev->active); | |
b1abb4d6 JB |
1350 | break; |
1351 | default: | |
1352 | /* | |
1353 | * We allow the OS to queue 2 untagged transactions to | |
1354 | * us at any time even though we can only execute them | |
1355 | * serially on the controller/device. This should | |
1356 | * remove some latency. | |
1357 | */ | |
fdd0edf2 | 1358 | scsi_deactivate_tcq(sdev, 2); |
b1abb4d6 | 1359 | break; |
1da177e4 | 1360 | } |
1da177e4 LT |
1361 | } |
1362 | ||
1363 | int | |
1364 | ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, | |
1365 | int lun, u_int tag, role_t role, uint32_t status) | |
1366 | { | |
e4e360c3 | 1367 | return 0; |
1da177e4 LT |
1368 | } |
1369 | ||
cb624029 JB |
1370 | static u_int |
1371 | ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) | |
1da177e4 | 1372 | { |
cb624029 JB |
1373 | static int warned_user; |
1374 | u_int tags; | |
1da177e4 | 1375 | |
cb624029 JB |
1376 | tags = 0; |
1377 | if ((ahc->user_discenable & devinfo->target_mask) != 0) { | |
6391a113 | 1378 | if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { |
cb624029 | 1379 | if (warned_user == 0) { |
1da177e4 | 1380 | |
48813cf9 | 1381 | printk(KERN_WARNING |
cb624029 JB |
1382 | "aic7xxx: WARNING: Insufficient tag_info instances\n" |
1383 | "aic7xxx: for installed controllers. Using defaults\n" | |
1384 | "aic7xxx: Please update the aic7xxx_tag_info array in\n" | |
1385 | "aic7xxx: the aic7xxx_osm..c source file.\n"); | |
1386 | warned_user++; | |
1387 | } | |
1388 | tags = AHC_MAX_QUEUE; | |
1389 | } else { | |
1390 | adapter_tag_info_t *tag_info; | |
1da177e4 | 1391 | |
cb624029 JB |
1392 | tag_info = &aic7xxx_tag_info[ahc->unit]; |
1393 | tags = tag_info->tag_commands[devinfo->target_offset]; | |
1394 | if (tags > AHC_MAX_QUEUE) | |
1395 | tags = AHC_MAX_QUEUE; | |
1396 | } | |
1da177e4 | 1397 | } |
cb624029 | 1398 | return (tags); |
1da177e4 LT |
1399 | } |
1400 | ||
cb624029 JB |
1401 | /* |
1402 | * Determines the queue depth for a given device. | |
1403 | */ | |
1da177e4 | 1404 | static void |
b1abb4d6 | 1405 | ahc_linux_device_queue_depth(struct scsi_device *sdev) |
1da177e4 | 1406 | { |
cb624029 JB |
1407 | struct ahc_devinfo devinfo; |
1408 | u_int tags; | |
b1abb4d6 | 1409 | struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); |
1da177e4 | 1410 | |
cb624029 | 1411 | ahc_compile_devinfo(&devinfo, |
b1abb4d6 | 1412 | sdev->sdev_target->channel == 0 |
cb624029 | 1413 | ? ahc->our_id : ahc->our_id_b, |
b1abb4d6 JB |
1414 | sdev->sdev_target->id, sdev->lun, |
1415 | sdev->sdev_target->channel == 0 ? 'A' : 'B', | |
cb624029 JB |
1416 | ROLE_INITIATOR); |
1417 | tags = ahc_linux_user_tagdepth(ahc, &devinfo); | |
b1abb4d6 | 1418 | if (tags != 0 && sdev->tagged_supported != 0) { |
1da177e4 | 1419 | |
9080063f HR |
1420 | ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); |
1421 | ahc_send_async(ahc, devinfo.channel, devinfo.target, | |
1422 | devinfo.lun, AC_TRANSFER_NEG); | |
cb624029 | 1423 | ahc_print_devinfo(ahc, &devinfo); |
48813cf9 | 1424 | printk("Tagged Queuing enabled. Depth %d\n", tags); |
1da177e4 | 1425 | } else { |
9080063f HR |
1426 | ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); |
1427 | ahc_send_async(ahc, devinfo.channel, devinfo.target, | |
1428 | devinfo.lun, AC_TRANSFER_NEG); | |
1da177e4 LT |
1429 | } |
1430 | } | |
1431 | ||
e4e360c3 JB |
1432 | static int |
1433 | ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, | |
1434 | struct scsi_cmnd *cmd) | |
1da177e4 | 1435 | { |
cb624029 JB |
1436 | struct scb *scb; |
1437 | struct hardware_scb *hscb; | |
1438 | struct ahc_initiator_tinfo *tinfo; | |
1439 | struct ahc_tmode_tstate *tstate; | |
1440 | uint16_t mask; | |
e4e360c3 | 1441 | struct scb_tailq *untagged_q = NULL; |
3a57c4a5 | 1442 | int nseg; |
1da177e4 | 1443 | |
e4e360c3 JB |
1444 | /* |
1445 | * Schedule us to run later. The only reason we are not | |
1446 | * running is because the whole controller Q is frozen. | |
1447 | */ | |
1448 | if (ahc->platform_data->qfrozen != 0) | |
1449 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 1450 | |
e4e360c3 JB |
1451 | /* |
1452 | * We only allow one untagged transaction | |
1453 | * per target in the initiator role unless | |
1454 | * we are storing a full busy target *lun* | |
1455 | * table in SCB space. | |
1456 | */ | |
1457 | if (!blk_rq_tagged(cmd->request) | |
1458 | && (ahc->features & AHC_SCB_BTT) == 0) { | |
1459 | int target_offset; | |
1da177e4 | 1460 | |
e4e360c3 JB |
1461 | target_offset = cmd->device->id + cmd->device->channel * 8; |
1462 | untagged_q = &(ahc->untagged_queues[target_offset]); | |
1463 | if (!TAILQ_EMPTY(untagged_q)) | |
1464 | /* if we're already executing an untagged command | |
1465 | * we're busy to another */ | |
1466 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1467 | } | |
1468 | ||
647b2425 FT |
1469 | nseg = scsi_dma_map(cmd); |
1470 | if (nseg < 0) | |
1471 | return SCSI_MLQUEUE_HOST_BUSY; | |
1472 | ||
e4e360c3 JB |
1473 | /* |
1474 | * Get an scb to use. | |
1475 | */ | |
8eb37942 | 1476 | scb = ahc_get_scb(ahc); |
647b2425 FT |
1477 | if (!scb) { |
1478 | scsi_dma_unmap(cmd); | |
8eb37942 | 1479 | return SCSI_MLQUEUE_HOST_BUSY; |
647b2425 | 1480 | } |
1da177e4 | 1481 | |
e4e360c3 JB |
1482 | scb->io_ctx = cmd; |
1483 | scb->platform_data->dev = dev; | |
1484 | hscb = scb->hscb; | |
1485 | cmd->host_scribble = (char *)scb; | |
1da177e4 | 1486 | |
e4e360c3 JB |
1487 | /* |
1488 | * Fill out basics of the HSCB. | |
1489 | */ | |
1490 | hscb->control = 0; | |
1491 | hscb->scsiid = BUILD_SCSIID(ahc, cmd); | |
1492 | hscb->lun = cmd->device->lun; | |
1493 | mask = SCB_GET_TARGET_MASK(ahc, scb); | |
1494 | tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), | |
1495 | SCB_GET_OUR_ID(scb), | |
1496 | SCB_GET_TARGET(ahc, scb), &tstate); | |
1497 | hscb->scsirate = tinfo->scsirate; | |
1498 | hscb->scsioffset = tinfo->curr.offset; | |
1499 | if ((tstate->ultraenb & mask) != 0) | |
1500 | hscb->control |= ULTRAENB; | |
1501 | ||
1502 | if ((ahc->user_discenable & mask) != 0) | |
1503 | hscb->control |= DISCENB; | |
1504 | ||
1505 | if ((tstate->auto_negotiate & mask) != 0) { | |
1506 | scb->flags |= SCB_AUTO_NEGOTIATE; | |
1507 | scb->hscb->control |= MK_MESSAGE; | |
1508 | } | |
1509 | ||
1510 | if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { | |
e4e360c3 JB |
1511 | int msg_bytes; |
1512 | uint8_t tag_msgs[2]; | |
1513 | ||
1514 | msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); | |
1515 | if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { | |
1516 | hscb->control |= tag_msgs[0]; | |
1517 | if (tag_msgs[0] == MSG_ORDERED_TASK) | |
cb624029 | 1518 | dev->commands_since_idle_or_otag = 0; |
dedd8310 CH |
1519 | } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH |
1520 | && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { | |
e4e360c3 JB |
1521 | hscb->control |= MSG_ORDERED_TASK; |
1522 | dev->commands_since_idle_or_otag = 0; | |
cb624029 | 1523 | } else { |
e4e360c3 | 1524 | hscb->control |= MSG_SIMPLE_TASK; |
cb624029 | 1525 | } |
e4e360c3 | 1526 | } |
1da177e4 | 1527 | |
e4e360c3 JB |
1528 | hscb->cdb_len = cmd->cmd_len; |
1529 | if (hscb->cdb_len <= 12) { | |
1530 | memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); | |
1531 | } else { | |
1532 | memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); | |
1533 | scb->flags |= SCB_CDB32_PTR; | |
1534 | } | |
1da177e4 | 1535 | |
e4e360c3 JB |
1536 | scb->platform_data->xfer_len = 0; |
1537 | ahc_set_residual(scb, 0); | |
1538 | ahc_set_sense_residual(scb, 0); | |
1539 | scb->sg_count = 0; | |
3a57c4a5 | 1540 | |
3a57c4a5 | 1541 | if (nseg > 0) { |
e4e360c3 JB |
1542 | struct ahc_dma_seg *sg; |
1543 | struct scatterlist *cur_seg; | |
3a57c4a5 | 1544 | int i; |
e4e360c3 | 1545 | |
e4e360c3 JB |
1546 | /* Copy the segments into the SG list. */ |
1547 | sg = scb->sg_list; | |
1548 | /* | |
1549 | * The sg_count may be larger than nseg if | |
1550 | * a transfer crosses a 32bit page. | |
3a57c4a5 FT |
1551 | */ |
1552 | scsi_for_each_sg(cmd, cur_seg, nseg, i) { | |
1da177e4 | 1553 | dma_addr_t addr; |
e4e360c3 JB |
1554 | bus_size_t len; |
1555 | int consumed; | |
1556 | ||
1557 | addr = sg_dma_address(cur_seg); | |
1558 | len = sg_dma_len(cur_seg); | |
1559 | consumed = ahc_linux_map_seg(ahc, scb, | |
1560 | sg, addr, len); | |
1561 | sg += consumed; | |
1562 | scb->sg_count += consumed; | |
1da177e4 | 1563 | } |
e4e360c3 JB |
1564 | sg--; |
1565 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); | |
1da177e4 | 1566 | |
e4e360c3 JB |
1567 | /* |
1568 | * Reset the sg list pointer. | |
1569 | */ | |
1570 | scb->hscb->sgptr = | |
1571 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); | |
1572 | ||
1573 | /* | |
1574 | * Copy the first SG into the "current" | |
1575 | * data pointer area. | |
1576 | */ | |
1577 | scb->hscb->dataptr = scb->sg_list->addr; | |
1578 | scb->hscb->datacnt = scb->sg_list->len; | |
e4e360c3 JB |
1579 | } else { |
1580 | scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); | |
1581 | scb->hscb->dataptr = 0; | |
1582 | scb->hscb->datacnt = 0; | |
1583 | scb->sg_count = 0; | |
1584 | } | |
1585 | ||
1586 | LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); | |
1587 | dev->openings--; | |
1588 | dev->active++; | |
1589 | dev->commands_issued++; | |
1590 | if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) | |
1591 | dev->commands_since_idle_or_otag++; | |
1592 | ||
1593 | scb->flags |= SCB_ACTIVE; | |
1594 | if (untagged_q) { | |
1595 | TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); | |
1596 | scb->flags |= SCB_UNTAGGEDQ; | |
1da177e4 | 1597 | } |
e4e360c3 JB |
1598 | ahc_queue_scb(ahc, scb); |
1599 | return 0; | |
1da177e4 LT |
1600 | } |
1601 | ||
1602 | /* | |
1603 | * SCSI controller interrupt handler. | |
1604 | */ | |
1605 | irqreturn_t | |
7d12e780 | 1606 | ahc_linux_isr(int irq, void *dev_id) |
1da177e4 LT |
1607 | { |
1608 | struct ahc_softc *ahc; | |
1609 | u_long flags; | |
1610 | int ours; | |
1611 | ||
1612 | ahc = (struct ahc_softc *) dev_id; | |
1613 | ahc_lock(ahc, &flags); | |
1614 | ours = ahc_intr(ahc); | |
1da177e4 LT |
1615 | ahc_unlock(ahc, &flags); |
1616 | return IRQ_RETVAL(ours); | |
1617 | } | |
1618 | ||
1619 | void | |
1620 | ahc_platform_flushwork(struct ahc_softc *ahc) | |
1621 | { | |
1622 | ||
1da177e4 LT |
1623 | } |
1624 | ||
1da177e4 LT |
1625 | void |
1626 | ahc_send_async(struct ahc_softc *ahc, char channel, | |
9080063f | 1627 | u_int target, u_int lun, ac_code code) |
1da177e4 LT |
1628 | { |
1629 | switch (code) { | |
1630 | case AC_TRANSFER_NEG: | |
1631 | { | |
1632 | char buf[80]; | |
b1abb4d6 | 1633 | struct scsi_target *starget; |
1da177e4 LT |
1634 | struct ahc_linux_target *targ; |
1635 | struct info_str info; | |
1636 | struct ahc_initiator_tinfo *tinfo; | |
1637 | struct ahc_tmode_tstate *tstate; | |
1638 | int target_offset; | |
b1abb4d6 JB |
1639 | unsigned int target_ppr_options; |
1640 | ||
1641 | BUG_ON(target == CAM_TARGET_WILDCARD); | |
1da177e4 LT |
1642 | |
1643 | info.buffer = buf; | |
1644 | info.length = sizeof(buf); | |
1645 | info.offset = 0; | |
1646 | info.pos = 0; | |
1647 | tinfo = ahc_fetch_transinfo(ahc, channel, | |
1648 | channel == 'A' ? ahc->our_id | |
1649 | : ahc->our_id_b, | |
1650 | target, &tstate); | |
1651 | ||
1652 | /* | |
1653 | * Don't bother reporting results while | |
1654 | * negotiations are still pending. | |
1655 | */ | |
1656 | if (tinfo->curr.period != tinfo->goal.period | |
1657 | || tinfo->curr.width != tinfo->goal.width | |
1658 | || tinfo->curr.offset != tinfo->goal.offset | |
1659 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options) | |
1660 | if (bootverbose == 0) | |
1661 | break; | |
1662 | ||
1663 | /* | |
1664 | * Don't bother reporting results that | |
1665 | * are identical to those last reported. | |
1666 | */ | |
1667 | target_offset = target; | |
1668 | if (channel == 'B') | |
1669 | target_offset += 8; | |
b1abb4d6 | 1670 | starget = ahc->platform_data->starget[target_offset]; |
fc789a93 | 1671 | if (starget == NULL) |
1da177e4 | 1672 | break; |
fc789a93 | 1673 | targ = scsi_transport_target_data(starget); |
b1abb4d6 JB |
1674 | |
1675 | target_ppr_options = | |
1676 | (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) | |
1677 | + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) | |
1678 | + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); | |
1679 | ||
1680 | if (tinfo->curr.period == spi_period(starget) | |
1681 | && tinfo->curr.width == spi_width(starget) | |
1682 | && tinfo->curr.offset == spi_offset(starget) | |
1683 | && tinfo->curr.ppr_options == target_ppr_options) | |
1da177e4 LT |
1684 | if (bootverbose == 0) |
1685 | break; | |
1686 | ||
b1abb4d6 JB |
1687 | spi_period(starget) = tinfo->curr.period; |
1688 | spi_width(starget) = tinfo->curr.width; | |
1689 | spi_offset(starget) = tinfo->curr.offset; | |
f7ff898a JB |
1690 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; |
1691 | spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; | |
1692 | spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; | |
b1abb4d6 | 1693 | spi_display_xfer_agreement(starget); |
1da177e4 LT |
1694 | break; |
1695 | } | |
1696 | case AC_SENT_BDR: | |
1697 | { | |
1da177e4 LT |
1698 | WARN_ON(lun != CAM_LUN_WILDCARD); |
1699 | scsi_report_device_reset(ahc->platform_data->host, | |
1700 | channel - 'A', target); | |
1da177e4 LT |
1701 | break; |
1702 | } | |
1703 | case AC_BUS_RESET: | |
1704 | if (ahc->platform_data->host != NULL) { | |
1705 | scsi_report_bus_reset(ahc->platform_data->host, | |
1706 | channel - 'A'); | |
1707 | } | |
1708 | break; | |
1709 | default: | |
1710 | panic("ahc_send_async: Unexpected async event"); | |
1711 | } | |
1712 | } | |
1713 | ||
1714 | /* | |
1715 | * Calls the higher level scsi done function and frees the scb. | |
1716 | */ | |
1717 | void | |
1718 | ahc_done(struct ahc_softc *ahc, struct scb *scb) | |
1719 | { | |
013791ee | 1720 | struct scsi_cmnd *cmd; |
1da177e4 LT |
1721 | struct ahc_linux_device *dev; |
1722 | ||
1723 | LIST_REMOVE(scb, pending_links); | |
1724 | if ((scb->flags & SCB_UNTAGGEDQ) != 0) { | |
1725 | struct scb_tailq *untagged_q; | |
1726 | int target_offset; | |
1727 | ||
1728 | target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); | |
1729 | untagged_q = &(ahc->untagged_queues[target_offset]); | |
1730 | TAILQ_REMOVE(untagged_q, scb, links.tqe); | |
e4e360c3 | 1731 | BUG_ON(!TAILQ_EMPTY(untagged_q)); |
969ceffb DM |
1732 | } else if ((scb->flags & SCB_ACTIVE) == 0) { |
1733 | /* | |
1734 | * Transactions aborted from the untagged queue may | |
1735 | * not have been dispatched to the controller, so | |
1736 | * only check the SCB_ACTIVE flag for tagged transactions. | |
1737 | */ | |
48813cf9 | 1738 | printk("SCB %d done'd twice\n", scb->hscb->tag); |
1da177e4 LT |
1739 | ahc_dump_card_state(ahc); |
1740 | panic("Stopping for safety"); | |
1741 | } | |
1742 | cmd = scb->io_ctx; | |
1743 | dev = scb->platform_data->dev; | |
1744 | dev->active--; | |
1745 | dev->openings++; | |
1746 | if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { | |
1747 | cmd->result &= ~(CAM_DEV_QFRZN << 16); | |
1748 | dev->qfrozen--; | |
1749 | } | |
1750 | ahc_linux_unmap_scb(ahc, scb); | |
1751 | ||
1752 | /* | |
1753 | * Guard against stale sense data. | |
1754 | * The Linux mid-layer assumes that sense | |
1755 | * was retrieved anytime the first byte of | |
1756 | * the sense buffer looks "sane". | |
1757 | */ | |
1758 | cmd->sense_buffer[0] = 0; | |
1759 | if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { | |
1760 | uint32_t amount_xferred; | |
1761 | ||
1762 | amount_xferred = | |
1763 | ahc_get_transfer_length(scb) - ahc_get_residual(scb); | |
1764 | if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { | |
1765 | #ifdef AHC_DEBUG | |
1766 | if ((ahc_debug & AHC_SHOW_MISC) != 0) { | |
1767 | ahc_print_path(ahc, scb); | |
48813cf9 | 1768 | printk("Set CAM_UNCOR_PARITY\n"); |
1da177e4 LT |
1769 | } |
1770 | #endif | |
1771 | ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); | |
1772 | #ifdef AHC_REPORT_UNDERFLOWS | |
1773 | /* | |
1774 | * This code is disabled by default as some | |
1775 | * clients of the SCSI system do not properly | |
1776 | * initialize the underflow parameter. This | |
1777 | * results in spurious termination of commands | |
1778 | * that complete as expected (e.g. underflow is | |
1779 | * allowed as command can return variable amounts | |
1780 | * of data. | |
1781 | */ | |
1782 | } else if (amount_xferred < scb->io_ctx->underflow) { | |
1783 | u_int i; | |
1784 | ||
1785 | ahc_print_path(ahc, scb); | |
48813cf9 | 1786 | printk("CDB:"); |
1da177e4 | 1787 | for (i = 0; i < scb->io_ctx->cmd_len; i++) |
48813cf9 PE |
1788 | printk(" 0x%x", scb->io_ctx->cmnd[i]); |
1789 | printk("\n"); | |
1da177e4 | 1790 | ahc_print_path(ahc, scb); |
48813cf9 | 1791 | printk("Saw underflow (%ld of %ld bytes). " |
1da177e4 LT |
1792 | "Treated as error\n", |
1793 | ahc_get_residual(scb), | |
1794 | ahc_get_transfer_length(scb)); | |
1795 | ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); | |
1796 | #endif | |
1797 | } else { | |
1798 | ahc_set_transaction_status(scb, CAM_REQ_CMP); | |
1799 | } | |
1800 | } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { | |
b1abb4d6 | 1801 | ahc_linux_handle_scsi_status(ahc, cmd->device, scb); |
1da177e4 | 1802 | } |
1da177e4 LT |
1803 | |
1804 | if (dev->openings == 1 | |
1805 | && ahc_get_transaction_status(scb) == CAM_REQ_CMP | |
1806 | && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) | |
1807 | dev->tag_success_count++; | |
1808 | /* | |
1809 | * Some devices deal with temporary internal resource | |
1810 | * shortages by returning queue full. When the queue | |
1811 | * full occurrs, we throttle back. Slowly try to get | |
1812 | * back to our previous queue depth. | |
1813 | */ | |
1814 | if ((dev->openings + dev->active) < dev->maxtags | |
1815 | && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { | |
1816 | dev->tag_success_count = 0; | |
1817 | dev->openings++; | |
1818 | } | |
1819 | ||
1820 | if (dev->active == 0) | |
1821 | dev->commands_since_idle_or_otag = 0; | |
1822 | ||
1da177e4 | 1823 | if ((scb->flags & SCB_RECOVERY_SCB) != 0) { |
48813cf9 | 1824 | printk("Recovery SCB completes\n"); |
1da177e4 LT |
1825 | if (ahc_get_transaction_status(scb) == CAM_BDR_SENT |
1826 | || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) | |
1827 | ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); | |
8cac8145 CH |
1828 | |
1829 | if (ahc->platform_data->eh_done) | |
1830 | complete(ahc->platform_data->eh_done); | |
1da177e4 LT |
1831 | } |
1832 | ||
1833 | ahc_free_scb(ahc, scb); | |
1834 | ahc_linux_queue_cmd_complete(ahc, cmd); | |
1da177e4 LT |
1835 | } |
1836 | ||
1837 | static void | |
1838 | ahc_linux_handle_scsi_status(struct ahc_softc *ahc, | |
b1abb4d6 | 1839 | struct scsi_device *sdev, struct scb *scb) |
1da177e4 LT |
1840 | { |
1841 | struct ahc_devinfo devinfo; | |
b1abb4d6 | 1842 | struct ahc_linux_device *dev = scsi_transport_device_data(sdev); |
1da177e4 LT |
1843 | |
1844 | ahc_compile_devinfo(&devinfo, | |
1845 | ahc->our_id, | |
b1abb4d6 JB |
1846 | sdev->sdev_target->id, sdev->lun, |
1847 | sdev->sdev_target->channel == 0 ? 'A' : 'B', | |
1da177e4 LT |
1848 | ROLE_INITIATOR); |
1849 | ||
1850 | /* | |
1851 | * We don't currently trust the mid-layer to | |
1852 | * properly deal with queue full or busy. So, | |
1853 | * when one occurs, we tell the mid-layer to | |
1854 | * unconditionally requeue the command to us | |
1855 | * so that we can retry it ourselves. We also | |
1856 | * implement our own throttling mechanism so | |
1857 | * we don't clobber the device with too many | |
1858 | * commands. | |
1859 | */ | |
1860 | switch (ahc_get_scsi_status(scb)) { | |
1861 | default: | |
1862 | break; | |
1863 | case SCSI_STATUS_CHECK_COND: | |
1864 | case SCSI_STATUS_CMD_TERMINATED: | |
1865 | { | |
013791ee | 1866 | struct scsi_cmnd *cmd; |
1da177e4 LT |
1867 | |
1868 | /* | |
1869 | * Copy sense information to the OS's cmd | |
1870 | * structure if it is available. | |
1871 | */ | |
1872 | cmd = scb->io_ctx; | |
1873 | if (scb->flags & SCB_SENSE) { | |
1874 | u_int sense_size; | |
1875 | ||
6d07cb71 | 1876 | sense_size = min(sizeof(struct scsi_sense_data) |
1da177e4 | 1877 | - ahc_get_sense_residual(scb), |
b80ca4f7 | 1878 | (u_long)SCSI_SENSE_BUFFERSIZE); |
1da177e4 LT |
1879 | memcpy(cmd->sense_buffer, |
1880 | ahc_get_sense_buf(ahc, scb), sense_size); | |
b80ca4f7 | 1881 | if (sense_size < SCSI_SENSE_BUFFERSIZE) |
1da177e4 | 1882 | memset(&cmd->sense_buffer[sense_size], 0, |
b80ca4f7 | 1883 | SCSI_SENSE_BUFFERSIZE - sense_size); |
1da177e4 LT |
1884 | cmd->result |= (DRIVER_SENSE << 24); |
1885 | #ifdef AHC_DEBUG | |
1886 | if (ahc_debug & AHC_SHOW_SENSE) { | |
1887 | int i; | |
1888 | ||
48813cf9 | 1889 | printk("Copied %d bytes of sense data:", |
1da177e4 LT |
1890 | sense_size); |
1891 | for (i = 0; i < sense_size; i++) { | |
1892 | if ((i & 0xF) == 0) | |
48813cf9 PE |
1893 | printk("\n"); |
1894 | printk("0x%x ", cmd->sense_buffer[i]); | |
1da177e4 | 1895 | } |
48813cf9 | 1896 | printk("\n"); |
1da177e4 LT |
1897 | } |
1898 | #endif | |
1899 | } | |
1900 | break; | |
1901 | } | |
1902 | case SCSI_STATUS_QUEUE_FULL: | |
1903 | { | |
1904 | /* | |
1905 | * By the time the core driver has returned this | |
1906 | * command, all other commands that were queued | |
1907 | * to us but not the device have been returned. | |
1908 | * This ensures that dev->active is equal to | |
1909 | * the number of commands actually queued to | |
1910 | * the device. | |
1911 | */ | |
1912 | dev->tag_success_count = 0; | |
1913 | if (dev->active != 0) { | |
1914 | /* | |
1915 | * Drop our opening count to the number | |
1916 | * of commands currently outstanding. | |
1917 | */ | |
1918 | dev->openings = 0; | |
1919 | /* | |
1920 | ahc_print_path(ahc, scb); | |
48813cf9 | 1921 | printk("Dropping tag count to %d\n", dev->active); |
1da177e4 LT |
1922 | */ |
1923 | if (dev->active == dev->tags_on_last_queuefull) { | |
1924 | ||
1925 | dev->last_queuefull_same_count++; | |
1926 | /* | |
1927 | * If we repeatedly see a queue full | |
1928 | * at the same queue depth, this | |
1929 | * device has a fixed number of tag | |
1930 | * slots. Lock in this tag depth | |
1931 | * so we stop seeing queue fulls from | |
1932 | * this device. | |
1933 | */ | |
1934 | if (dev->last_queuefull_same_count | |
1935 | == AHC_LOCK_TAGS_COUNT) { | |
1936 | dev->maxtags = dev->active; | |
1937 | ahc_print_path(ahc, scb); | |
48813cf9 | 1938 | printk("Locking max tag count at %d\n", |
1da177e4 LT |
1939 | dev->active); |
1940 | } | |
1941 | } else { | |
1942 | dev->tags_on_last_queuefull = dev->active; | |
1943 | dev->last_queuefull_same_count = 0; | |
1944 | } | |
1945 | ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); | |
1946 | ahc_set_scsi_status(scb, SCSI_STATUS_OK); | |
9080063f | 1947 | ahc_platform_set_tags(ahc, sdev, &devinfo, |
1da177e4 LT |
1948 | (dev->flags & AHC_DEV_Q_BASIC) |
1949 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | |
1950 | break; | |
1951 | } | |
1952 | /* | |
1953 | * Drop down to a single opening, and treat this | |
1954 | * as if the target returned BUSY SCSI status. | |
1955 | */ | |
1956 | dev->openings = 1; | |
1957 | ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); | |
9080063f | 1958 | ahc_platform_set_tags(ahc, sdev, &devinfo, |
1da177e4 LT |
1959 | (dev->flags & AHC_DEV_Q_BASIC) |
1960 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | |
1da177e4 LT |
1961 | break; |
1962 | } | |
1963 | } | |
1964 | } | |
1965 | ||
1966 | static void | |
013791ee | 1967 | ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) |
1da177e4 | 1968 | { |
1da177e4 LT |
1969 | /* |
1970 | * Map CAM error codes into Linux Error codes. We | |
1971 | * avoid the conversion so that the DV code has the | |
1972 | * full error information available when making | |
1973 | * state change decisions. | |
1974 | */ | |
cb624029 | 1975 | { |
1da177e4 LT |
1976 | u_int new_status; |
1977 | ||
1978 | switch (ahc_cmd_get_transaction_status(cmd)) { | |
1979 | case CAM_REQ_INPROG: | |
1980 | case CAM_REQ_CMP: | |
1981 | case CAM_SCSI_STATUS_ERROR: | |
1982 | new_status = DID_OK; | |
1983 | break; | |
1984 | case CAM_REQ_ABORTED: | |
1985 | new_status = DID_ABORT; | |
1986 | break; | |
1987 | case CAM_BUSY: | |
1988 | new_status = DID_BUS_BUSY; | |
1989 | break; | |
1990 | case CAM_REQ_INVALID: | |
1991 | case CAM_PATH_INVALID: | |
1992 | new_status = DID_BAD_TARGET; | |
1993 | break; | |
1994 | case CAM_SEL_TIMEOUT: | |
1995 | new_status = DID_NO_CONNECT; | |
1996 | break; | |
1997 | case CAM_SCSI_BUS_RESET: | |
1998 | case CAM_BDR_SENT: | |
1999 | new_status = DID_RESET; | |
2000 | break; | |
2001 | case CAM_UNCOR_PARITY: | |
2002 | new_status = DID_PARITY; | |
2003 | break; | |
2004 | case CAM_CMD_TIMEOUT: | |
2005 | new_status = DID_TIME_OUT; | |
2006 | break; | |
2007 | case CAM_UA_ABORT: | |
2008 | case CAM_REQ_CMP_ERR: | |
2009 | case CAM_AUTOSENSE_FAIL: | |
2010 | case CAM_NO_HBA: | |
2011 | case CAM_DATA_RUN_ERR: | |
2012 | case CAM_UNEXP_BUSFREE: | |
2013 | case CAM_SEQUENCE_FAIL: | |
2014 | case CAM_CCB_LEN_ERR: | |
2015 | case CAM_PROVIDE_FAIL: | |
2016 | case CAM_REQ_TERMIO: | |
2017 | case CAM_UNREC_HBA_ERROR: | |
2018 | case CAM_REQ_TOO_BIG: | |
2019 | new_status = DID_ERROR; | |
2020 | break; | |
2021 | case CAM_REQUEUE_REQ: | |
8e45ebcc | 2022 | new_status = DID_REQUEUE; |
1da177e4 LT |
2023 | break; |
2024 | default: | |
2025 | /* We should never get here */ | |
2026 | new_status = DID_ERROR; | |
2027 | break; | |
2028 | } | |
2029 | ||
2030 | ahc_cmd_set_transaction_status(cmd, new_status); | |
2031 | } | |
2032 | ||
8e45ebcc | 2033 | cmd->scsi_done(cmd); |
1da177e4 LT |
2034 | } |
2035 | ||
1da177e4 LT |
2036 | static void |
2037 | ahc_linux_freeze_simq(struct ahc_softc *ahc) | |
2038 | { | |
dacee84b JB |
2039 | unsigned long s; |
2040 | ||
2041 | ahc_lock(ahc, &s); | |
1da177e4 LT |
2042 | ahc->platform_data->qfrozen++; |
2043 | if (ahc->platform_data->qfrozen == 1) { | |
2044 | scsi_block_requests(ahc->platform_data->host); | |
2045 | ||
2046 | /* XXX What about Twin channels? */ | |
2047 | ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, | |
2048 | CAM_LUN_WILDCARD, SCB_LIST_NULL, | |
2049 | ROLE_INITIATOR, CAM_REQUEUE_REQ); | |
2050 | } | |
dacee84b | 2051 | ahc_unlock(ahc, &s); |
1da177e4 LT |
2052 | } |
2053 | ||
2054 | static void | |
dacee84b | 2055 | ahc_linux_release_simq(struct ahc_softc *ahc) |
1da177e4 | 2056 | { |
1da177e4 LT |
2057 | u_long s; |
2058 | int unblock_reqs; | |
2059 | ||
1da177e4 LT |
2060 | unblock_reqs = 0; |
2061 | ahc_lock(ahc, &s); | |
2062 | if (ahc->platform_data->qfrozen > 0) | |
2063 | ahc->platform_data->qfrozen--; | |
2064 | if (ahc->platform_data->qfrozen == 0) | |
2065 | unblock_reqs = 1; | |
1da177e4 LT |
2066 | ahc_unlock(ahc, &s); |
2067 | /* | |
2068 | * There is still a race here. The mid-layer | |
2069 | * should keep its own freeze count and use | |
2070 | * a bottom half handler to run the queues | |
2071 | * so we can unblock with our own lock held. | |
2072 | */ | |
2073 | if (unblock_reqs) | |
2074 | scsi_unblock_requests(ahc->platform_data->host); | |
2075 | } | |
2076 | ||
1da177e4 | 2077 | static int |
013791ee | 2078 | ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) |
1da177e4 LT |
2079 | { |
2080 | struct ahc_softc *ahc; | |
1da177e4 LT |
2081 | struct ahc_linux_device *dev; |
2082 | struct scb *pending_scb; | |
1da177e4 LT |
2083 | u_int saved_scbptr; |
2084 | u_int active_scb_index; | |
2085 | u_int last_phase; | |
2086 | u_int saved_scsiid; | |
2087 | u_int cdb_byte; | |
2088 | int retval; | |
2089 | int was_paused; | |
2090 | int paused; | |
2091 | int wait; | |
2092 | int disconnected; | |
6d5e9fd1 | 2093 | unsigned long flags; |
1da177e4 LT |
2094 | |
2095 | pending_scb = NULL; | |
2096 | paused = FALSE; | |
2097 | wait = FALSE; | |
2098 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
1da177e4 | 2099 | |
017560fc | 2100 | scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", |
1da177e4 LT |
2101 | flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); |
2102 | ||
48813cf9 | 2103 | printk("CDB:"); |
1da177e4 | 2104 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) |
48813cf9 PE |
2105 | printk(" 0x%x", cmd->cmnd[cdb_byte]); |
2106 | printk("\n"); | |
1da177e4 | 2107 | |
6d5e9fd1 | 2108 | ahc_lock(ahc, &flags); |
8fa728a2 | 2109 | |
1da177e4 LT |
2110 | /* |
2111 | * First determine if we currently own this command. | |
2112 | * Start by searching the device queue. If not found | |
2113 | * there, check the pending_scb list. If not found | |
2114 | * at all, and the system wanted us to just abort the | |
2115 | * command, return success. | |
2116 | */ | |
b1abb4d6 | 2117 | dev = scsi_transport_device_data(cmd->device); |
1da177e4 LT |
2118 | |
2119 | if (dev == NULL) { | |
2120 | /* | |
2121 | * No target device for this command exists, | |
2122 | * so we must not still own the command. | |
2123 | */ | |
48813cf9 | 2124 | printk("%s:%d:%d:%d: Is not an active device\n", |
1da177e4 LT |
2125 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
2126 | cmd->device->lun); | |
2127 | retval = SUCCESS; | |
2128 | goto no_cmd; | |
2129 | } | |
2130 | ||
1da177e4 LT |
2131 | if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 |
2132 | && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, | |
2133 | cmd->device->channel + 'A', | |
2134 | cmd->device->lun, | |
2135 | CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { | |
48813cf9 | 2136 | printk("%s:%d:%d:%d: Command found on untagged queue\n", |
1da177e4 LT |
2137 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
2138 | cmd->device->lun); | |
2139 | retval = SUCCESS; | |
2140 | goto done; | |
2141 | } | |
2142 | ||
2143 | /* | |
2144 | * See if we can find a matching cmd in the pending list. | |
2145 | */ | |
2146 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | |
2147 | if (pending_scb->io_ctx == cmd) | |
2148 | break; | |
2149 | } | |
2150 | ||
2151 | if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { | |
2152 | ||
2153 | /* Any SCB for this device will do for a target reset */ | |
2154 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | |
422c0d61 JG |
2155 | if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), |
2156 | scmd_channel(cmd) + 'A', | |
1da177e4 | 2157 | CAM_LUN_WILDCARD, |
dce20067 | 2158 | SCB_LIST_NULL, ROLE_INITIATOR)) |
1da177e4 LT |
2159 | break; |
2160 | } | |
2161 | } | |
2162 | ||
2163 | if (pending_scb == NULL) { | |
017560fc | 2164 | scmd_printk(KERN_INFO, cmd, "Command not found\n"); |
1da177e4 LT |
2165 | goto no_cmd; |
2166 | } | |
2167 | ||
2168 | if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { | |
2169 | /* | |
2170 | * We can't queue two recovery actions using the same SCB | |
2171 | */ | |
2172 | retval = FAILED; | |
2173 | goto done; | |
2174 | } | |
2175 | ||
2176 | /* | |
2177 | * Ensure that the card doesn't do anything | |
2178 | * behind our back and that we didn't "just" miss | |
2179 | * an interrupt that would affect this cmd. | |
2180 | */ | |
2181 | was_paused = ahc_is_paused(ahc); | |
2182 | ahc_pause_and_flushwork(ahc); | |
2183 | paused = TRUE; | |
2184 | ||
2185 | if ((pending_scb->flags & SCB_ACTIVE) == 0) { | |
017560fc | 2186 | scmd_printk(KERN_INFO, cmd, "Command already completed\n"); |
1da177e4 LT |
2187 | goto no_cmd; |
2188 | } | |
2189 | ||
48813cf9 | 2190 | printk("%s: At time of recovery, card was %spaused\n", |
1da177e4 LT |
2191 | ahc_name(ahc), was_paused ? "" : "not "); |
2192 | ahc_dump_card_state(ahc); | |
2193 | ||
2194 | disconnected = TRUE; | |
2195 | if (flag == SCB_ABORT) { | |
2196 | if (ahc_search_qinfifo(ahc, cmd->device->id, | |
2197 | cmd->device->channel + 'A', | |
2198 | cmd->device->lun, | |
2199 | pending_scb->hscb->tag, | |
2200 | ROLE_INITIATOR, CAM_REQ_ABORTED, | |
2201 | SEARCH_COMPLETE) > 0) { | |
48813cf9 | 2202 | printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", |
1da177e4 LT |
2203 | ahc_name(ahc), cmd->device->channel, |
2204 | cmd->device->id, cmd->device->lun); | |
2205 | retval = SUCCESS; | |
2206 | goto done; | |
2207 | } | |
2208 | } else if (ahc_search_qinfifo(ahc, cmd->device->id, | |
2209 | cmd->device->channel + 'A', | |
2210 | cmd->device->lun, pending_scb->hscb->tag, | |
2211 | ROLE_INITIATOR, /*status*/0, | |
2212 | SEARCH_COUNT) > 0) { | |
2213 | disconnected = FALSE; | |
2214 | } | |
2215 | ||
2216 | if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { | |
2217 | struct scb *bus_scb; | |
2218 | ||
2219 | bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); | |
2220 | if (bus_scb == pending_scb) | |
2221 | disconnected = FALSE; | |
2222 | else if (flag != SCB_ABORT | |
2223 | && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid | |
2224 | && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) | |
2225 | disconnected = FALSE; | |
2226 | } | |
2227 | ||
2228 | /* | |
2229 | * At this point, pending_scb is the scb associated with the | |
2230 | * passed in command. That command is currently active on the | |
2231 | * bus, is in the disconnected state, or we're hoping to find | |
2232 | * a command for the same target active on the bus to abuse to | |
2233 | * send a BDR. Queue the appropriate message based on which of | |
2234 | * these states we are in. | |
2235 | */ | |
2236 | last_phase = ahc_inb(ahc, LASTPHASE); | |
2237 | saved_scbptr = ahc_inb(ahc, SCBPTR); | |
2238 | active_scb_index = ahc_inb(ahc, SCB_TAG); | |
2239 | saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); | |
2240 | if (last_phase != P_BUSFREE | |
2241 | && (pending_scb->hscb->tag == active_scb_index | |
2242 | || (flag == SCB_DEVICE_RESET | |
422c0d61 | 2243 | && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { |
1da177e4 LT |
2244 | |
2245 | /* | |
2246 | * We're active on the bus, so assert ATN | |
2247 | * and hope that the target responds. | |
2248 | */ | |
2249 | pending_scb = ahc_lookup_scb(ahc, active_scb_index); | |
2250 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | |
2251 | ahc_outb(ahc, MSG_OUT, HOST_MSG); | |
2252 | ahc_outb(ahc, SCSISIGO, last_phase|ATNO); | |
017560fc | 2253 | scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); |
1da177e4 LT |
2254 | wait = TRUE; |
2255 | } else if (disconnected) { | |
2256 | ||
2257 | /* | |
2258 | * Actually re-queue this SCB in an attempt | |
2259 | * to select the device before it reconnects. | |
2260 | * In either case (selection or reselection), | |
2261 | * we will now issue the approprate message | |
2262 | * to the timed-out device. | |
2263 | * | |
2264 | * Set the MK_MESSAGE control bit indicating | |
2265 | * that we desire to send a message. We | |
2266 | * also set the disconnected flag since | |
2267 | * in the paging case there is no guarantee | |
2268 | * that our SCB control byte matches the | |
2269 | * version on the card. We don't want the | |
2270 | * sequencer to abort the command thinking | |
2271 | * an unsolicited reselection occurred. | |
2272 | */ | |
2273 | pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; | |
2274 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | |
2275 | ||
2276 | /* | |
2277 | * Remove any cached copy of this SCB in the | |
2278 | * disconnected list in preparation for the | |
2279 | * queuing of our abort SCB. We use the | |
2280 | * same element in the SCB, SCB_NEXT, for | |
2281 | * both the qinfifo and the disconnected list. | |
2282 | */ | |
2283 | ahc_search_disc_list(ahc, cmd->device->id, | |
2284 | cmd->device->channel + 'A', | |
2285 | cmd->device->lun, pending_scb->hscb->tag, | |
2286 | /*stop_on_first*/TRUE, | |
2287 | /*remove*/TRUE, | |
2288 | /*save_state*/FALSE); | |
2289 | ||
2290 | /* | |
2291 | * In the non-paging case, the sequencer will | |
2292 | * never re-reference the in-core SCB. | |
2293 | * To make sure we are notified during | |
b71a8eb0 | 2294 | * reselection, set the MK_MESSAGE flag in |
1da177e4 LT |
2295 | * the card's copy of the SCB. |
2296 | */ | |
2297 | if ((ahc->flags & AHC_PAGESCBS) == 0) { | |
2298 | ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); | |
2299 | ahc_outb(ahc, SCB_CONTROL, | |
2300 | ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); | |
2301 | } | |
2302 | ||
2303 | /* | |
2304 | * Clear out any entries in the QINFIFO first | |
2305 | * so we are the next SCB for this target | |
2306 | * to run. | |
2307 | */ | |
2308 | ahc_search_qinfifo(ahc, cmd->device->id, | |
2309 | cmd->device->channel + 'A', | |
2310 | cmd->device->lun, SCB_LIST_NULL, | |
2311 | ROLE_INITIATOR, CAM_REQUEUE_REQ, | |
2312 | SEARCH_COMPLETE); | |
2313 | ahc_qinfifo_requeue_tail(ahc, pending_scb); | |
2314 | ahc_outb(ahc, SCBPTR, saved_scbptr); | |
2315 | ahc_print_path(ahc, pending_scb); | |
48813cf9 | 2316 | printk("Device is disconnected, re-queuing SCB\n"); |
1da177e4 LT |
2317 | wait = TRUE; |
2318 | } else { | |
017560fc | 2319 | scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); |
1da177e4 LT |
2320 | retval = FAILED; |
2321 | goto done; | |
2322 | } | |
2323 | ||
2324 | no_cmd: | |
2325 | /* | |
2326 | * Our assumption is that if we don't have the command, no | |
2327 | * recovery action was required, so we return success. Again, | |
2328 | * the semantics of the mid-layer recovery engine are not | |
2329 | * well defined, so this may change in time. | |
2330 | */ | |
2331 | retval = SUCCESS; | |
2332 | done: | |
2333 | if (paused) | |
2334 | ahc_unpause(ahc); | |
2335 | if (wait) { | |
6e9a4738 | 2336 | DECLARE_COMPLETION_ONSTACK(done); |
1da177e4 | 2337 | |
8cac8145 | 2338 | ahc->platform_data->eh_done = &done; |
6d5e9fd1 CH |
2339 | ahc_unlock(ahc, &flags); |
2340 | ||
48813cf9 | 2341 | printk("Recovery code sleeping\n"); |
8cac8145 CH |
2342 | if (!wait_for_completion_timeout(&done, 5 * HZ)) { |
2343 | ahc_lock(ahc, &flags); | |
2344 | ahc->platform_data->eh_done = NULL; | |
2345 | ahc_unlock(ahc, &flags); | |
2346 | ||
48813cf9 | 2347 | printk("Timer Expired\n"); |
1da177e4 LT |
2348 | retval = FAILED; |
2349 | } | |
48813cf9 | 2350 | printk("Recovery code awake\n"); |
6d5e9fd1 CH |
2351 | } else |
2352 | ahc_unlock(ahc, &flags); | |
1da177e4 LT |
2353 | return (retval); |
2354 | } | |
2355 | ||
2356 | void | |
2357 | ahc_platform_dump_card_state(struct ahc_softc *ahc) | |
2358 | { | |
1da177e4 LT |
2359 | } |
2360 | ||
fad01ef8 JB |
2361 | static void ahc_linux_set_width(struct scsi_target *starget, int width) |
2362 | { | |
2363 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2364 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2365 | struct ahc_devinfo devinfo; | |
2366 | unsigned long flags; | |
2367 | ||
2368 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2369 | starget->channel + 'A', ROLE_INITIATOR); | |
2370 | ahc_lock(ahc, &flags); | |
2371 | ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); | |
2372 | ahc_unlock(ahc, &flags); | |
2373 | } | |
2374 | ||
92d161c3 JB |
2375 | static void ahc_linux_set_period(struct scsi_target *starget, int period) |
2376 | { | |
2377 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2378 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2379 | struct ahc_tmode_tstate *tstate; | |
2380 | struct ahc_initiator_tinfo *tinfo | |
2381 | = ahc_fetch_transinfo(ahc, | |
2382 | starget->channel + 'A', | |
2383 | shost->this_id, starget->id, &tstate); | |
2384 | struct ahc_devinfo devinfo; | |
597487b9 | 2385 | unsigned int ppr_options = tinfo->goal.ppr_options; |
92d161c3 | 2386 | unsigned long flags; |
597487b9 | 2387 | unsigned long offset = tinfo->goal.offset; |
d1d7b19d | 2388 | const struct ahc_syncrate *syncrate; |
92d161c3 JB |
2389 | |
2390 | if (offset == 0) | |
2391 | offset = MAX_OFFSET; | |
2392 | ||
2bf2c568 JB |
2393 | if (period < 9) |
2394 | period = 9; /* 12.5ns is our minimum */ | |
0f82cb92 JB |
2395 | if (period == 9) { |
2396 | if (spi_max_width(starget)) | |
2397 | ppr_options |= MSG_EXT_PPR_DT_REQ; | |
2398 | else | |
2399 | /* need wide for DT and need DT for 12.5 ns */ | |
2400 | period = 10; | |
2401 | } | |
2bf2c568 | 2402 | |
92d161c3 JB |
2403 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
2404 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 JB |
2405 | |
2406 | /* all PPR requests apart from QAS require wide transfers */ | |
2407 | if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { | |
fad01ef8 JB |
2408 | if (spi_width(starget) == 0) |
2409 | ppr_options &= MSG_EXT_PPR_QAS_REQ; | |
2410 | } | |
2411 | ||
92d161c3 JB |
2412 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
2413 | ahc_lock(ahc, &flags); | |
2414 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, | |
2415 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
2416 | ahc_unlock(ahc, &flags); | |
2417 | } | |
2418 | ||
92d161c3 JB |
2419 | static void ahc_linux_set_offset(struct scsi_target *starget, int offset) |
2420 | { | |
2421 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2422 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2423 | struct ahc_tmode_tstate *tstate; | |
2424 | struct ahc_initiator_tinfo *tinfo | |
2425 | = ahc_fetch_transinfo(ahc, | |
2426 | starget->channel + 'A', | |
2427 | shost->this_id, starget->id, &tstate); | |
2428 | struct ahc_devinfo devinfo; | |
2429 | unsigned int ppr_options = 0; | |
2430 | unsigned int period = 0; | |
2431 | unsigned long flags; | |
d1d7b19d | 2432 | const struct ahc_syncrate *syncrate = NULL; |
92d161c3 JB |
2433 | |
2434 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2435 | starget->channel + 'A', ROLE_INITIATOR); | |
2436 | if (offset != 0) { | |
2437 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); | |
597487b9 JB |
2438 | period = tinfo->goal.period; |
2439 | ppr_options = tinfo->goal.ppr_options; | |
92d161c3 JB |
2440 | } |
2441 | ahc_lock(ahc, &flags); | |
2442 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, | |
2443 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
2444 | ahc_unlock(ahc, &flags); | |
2445 | } | |
2446 | ||
92d161c3 JB |
2447 | static void ahc_linux_set_dt(struct scsi_target *starget, int dt) |
2448 | { | |
2449 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2450 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2451 | struct ahc_tmode_tstate *tstate; | |
2452 | struct ahc_initiator_tinfo *tinfo | |
2453 | = ahc_fetch_transinfo(ahc, | |
2454 | starget->channel + 'A', | |
2455 | shost->this_id, starget->id, &tstate); | |
2456 | struct ahc_devinfo devinfo; | |
597487b9 | 2457 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2458 | & ~MSG_EXT_PPR_DT_REQ; |
597487b9 | 2459 | unsigned int period = tinfo->goal.period; |
84e66ee7 | 2460 | unsigned int width = tinfo->goal.width; |
92d161c3 | 2461 | unsigned long flags; |
d1d7b19d | 2462 | const struct ahc_syncrate *syncrate; |
92d161c3 | 2463 | |
0f82cb92 | 2464 | if (dt && spi_max_width(starget)) { |
2bf2c568 | 2465 | ppr_options |= MSG_EXT_PPR_DT_REQ; |
84e66ee7 JB |
2466 | if (!width) |
2467 | ahc_linux_set_width(starget, 1); | |
2468 | } else if (period == 9) | |
2bf2c568 JB |
2469 | period = 10; /* if resetting DT, period must be >= 25ns */ |
2470 | ||
92d161c3 JB |
2471 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
2472 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2473 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); |
92d161c3 | 2474 | ahc_lock(ahc, &flags); |
597487b9 | 2475 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 JB |
2476 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2477 | ahc_unlock(ahc, &flags); | |
2478 | } | |
2479 | ||
ace4e718 JB |
2480 | #if 0 |
2481 | /* FIXME: This code claims to support IU and QAS. However, the actual | |
2482 | * sequencer code and aic7xxx_core have no support for these parameters and | |
2483 | * will get into a bad state if they're negotiated. Do not enable this | |
2484 | * unless you know what you're doing */ | |
92d161c3 JB |
2485 | static void ahc_linux_set_qas(struct scsi_target *starget, int qas) |
2486 | { | |
2487 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2488 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2489 | struct ahc_tmode_tstate *tstate; | |
2490 | struct ahc_initiator_tinfo *tinfo | |
2491 | = ahc_fetch_transinfo(ahc, | |
2492 | starget->channel + 'A', | |
2493 | shost->this_id, starget->id, &tstate); | |
2494 | struct ahc_devinfo devinfo; | |
597487b9 | 2495 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2496 | & ~MSG_EXT_PPR_QAS_REQ; |
597487b9 | 2497 | unsigned int period = tinfo->goal.period; |
92d161c3 JB |
2498 | unsigned long flags; |
2499 | struct ahc_syncrate *syncrate; | |
2500 | ||
2501 | if (qas) | |
2502 | ppr_options |= MSG_EXT_PPR_QAS_REQ; | |
2503 | ||
2504 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2505 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2506 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
92d161c3 | 2507 | ahc_lock(ahc, &flags); |
597487b9 | 2508 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 JB |
2509 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2510 | ahc_unlock(ahc, &flags); | |
2511 | } | |
2512 | ||
92d161c3 JB |
2513 | static void ahc_linux_set_iu(struct scsi_target *starget, int iu) |
2514 | { | |
2515 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2516 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2517 | struct ahc_tmode_tstate *tstate; | |
2518 | struct ahc_initiator_tinfo *tinfo | |
2519 | = ahc_fetch_transinfo(ahc, | |
2520 | starget->channel + 'A', | |
2521 | shost->this_id, starget->id, &tstate); | |
2522 | struct ahc_devinfo devinfo; | |
597487b9 | 2523 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2524 | & ~MSG_EXT_PPR_IU_REQ; |
597487b9 | 2525 | unsigned int period = tinfo->goal.period; |
92d161c3 JB |
2526 | unsigned long flags; |
2527 | struct ahc_syncrate *syncrate; | |
2528 | ||
2529 | if (iu) | |
2530 | ppr_options |= MSG_EXT_PPR_IU_REQ; | |
2531 | ||
2532 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2533 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2534 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
92d161c3 | 2535 | ahc_lock(ahc, &flags); |
597487b9 | 2536 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 JB |
2537 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2538 | ahc_unlock(ahc, &flags); | |
2539 | } | |
ace4e718 | 2540 | #endif |
92d161c3 | 2541 | |
b2d8bfe1 JB |
2542 | static void ahc_linux_get_signalling(struct Scsi_Host *shost) |
2543 | { | |
2544 | struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; | |
cf2b5d3f | 2545 | unsigned long flags; |
3e3c60e3 | 2546 | u8 mode; |
b2d8bfe1 | 2547 | |
3e3c60e3 JB |
2548 | if (!(ahc->features & AHC_ULTRA2)) { |
2549 | /* non-LVD chipset, may not have SBLKCTL reg */ | |
b2d8bfe1 JB |
2550 | spi_signalling(shost) = |
2551 | ahc->features & AHC_HVD ? | |
2552 | SPI_SIGNAL_HVD : | |
2553 | SPI_SIGNAL_SE; | |
3e3c60e3 JB |
2554 | return; |
2555 | } | |
2556 | ||
cf2b5d3f DL |
2557 | ahc_lock(ahc, &flags); |
2558 | ahc_pause(ahc); | |
3e3c60e3 | 2559 | mode = ahc_inb(ahc, SBLKCTL); |
cf2b5d3f DL |
2560 | ahc_unpause(ahc); |
2561 | ahc_unlock(ahc, &flags); | |
3e3c60e3 JB |
2562 | |
2563 | if (mode & ENAB40) | |
2564 | spi_signalling(shost) = SPI_SIGNAL_LVD; | |
2565 | else if (mode & ENAB20) | |
2566 | spi_signalling(shost) = SPI_SIGNAL_SE; | |
b2d8bfe1 JB |
2567 | else |
2568 | spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; | |
2569 | } | |
2570 | ||
92d161c3 | 2571 | static struct spi_function_template ahc_linux_transport_functions = { |
92d161c3 JB |
2572 | .set_offset = ahc_linux_set_offset, |
2573 | .show_offset = 1, | |
92d161c3 JB |
2574 | .set_period = ahc_linux_set_period, |
2575 | .show_period = 1, | |
92d161c3 JB |
2576 | .set_width = ahc_linux_set_width, |
2577 | .show_width = 1, | |
92d161c3 JB |
2578 | .set_dt = ahc_linux_set_dt, |
2579 | .show_dt = 1, | |
ace4e718 | 2580 | #if 0 |
92d161c3 JB |
2581 | .set_iu = ahc_linux_set_iu, |
2582 | .show_iu = 1, | |
92d161c3 JB |
2583 | .set_qas = ahc_linux_set_qas, |
2584 | .show_qas = 1, | |
ace4e718 | 2585 | #endif |
b2d8bfe1 | 2586 | .get_signalling = ahc_linux_get_signalling, |
92d161c3 JB |
2587 | }; |
2588 | ||
2589 | ||
2590 | ||
1da177e4 LT |
2591 | static int __init |
2592 | ahc_linux_init(void) | |
2593 | { | |
dfd287f6 CH |
2594 | /* |
2595 | * If we've been passed any parameters, process them now. | |
2596 | */ | |
2597 | if (aic7xxx) | |
2598 | aic7xxx_setup(aic7xxx); | |
2599 | ||
2600 | ahc_linux_transport_template = | |
2601 | spi_attach_transport(&ahc_linux_transport_functions); | |
92d161c3 JB |
2602 | if (!ahc_linux_transport_template) |
2603 | return -ENODEV; | |
dfd287f6 | 2604 | |
b1abb4d6 JB |
2605 | scsi_transport_reserve_device(ahc_linux_transport_template, |
2606 | sizeof(struct ahc_linux_device)); | |
dfd287f6 | 2607 | |
dfd287f6 CH |
2608 | ahc_linux_pci_init(); |
2609 | ahc_linux_eisa_init(); | |
2610 | return 0; | |
1da177e4 LT |
2611 | } |
2612 | ||
2613 | static void | |
2614 | ahc_linux_exit(void) | |
2615 | { | |
1da177e4 LT |
2616 | ahc_linux_pci_exit(); |
2617 | ahc_linux_eisa_exit(); | |
92d161c3 | 2618 | spi_release_transport(ahc_linux_transport_template); |
1da177e4 LT |
2619 | } |
2620 | ||
2621 | module_init(ahc_linux_init); | |
2622 | module_exit(ahc_linux_exit); |