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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 | 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 | ||
1da177e4 LT |
147 | /* |
148 | * To change the default number of tagged transactions allowed per-device, | |
149 | * add a line to the lilo.conf file like: | |
150 | * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" | |
151 | * which will result in the first four devices on the first two | |
152 | * controllers being set to a tagged queue depth of 32. | |
153 | * | |
154 | * The tag_commands is an array of 16 to allow for wide and twin adapters. | |
155 | * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 | |
156 | * for channel 1. | |
157 | */ | |
158 | typedef struct { | |
159 | uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ | |
160 | } adapter_tag_info_t; | |
161 | ||
162 | /* | |
163 | * Modify this as you see fit for your system. | |
164 | * | |
165 | * 0 tagged queuing disabled | |
166 | * 1 <= n <= 253 n == max tags ever dispatched. | |
167 | * | |
168 | * The driver will throttle the number of commands dispatched to a | |
169 | * device if it returns queue full. For devices with a fixed maximum | |
170 | * queue depth, the driver will eventually determine this depth and | |
171 | * lock it in (a console message is printed to indicate that a lock | |
172 | * has occurred). On some devices, queue full is returned for a temporary | |
173 | * resource shortage. These devices will return queue full at varying | |
174 | * depths. The driver will throttle back when the queue fulls occur and | |
175 | * attempt to slowly increase the depth over time as the device recovers | |
176 | * from the resource shortage. | |
177 | * | |
178 | * In this example, the first line will disable tagged queueing for all | |
179 | * the devices on the first probed aic7xxx adapter. | |
180 | * | |
181 | * The second line enables tagged queueing with 4 commands/LUN for IDs | |
182 | * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the | |
183 | * driver to attempt to use up to 64 tags for ID 1. | |
184 | * | |
185 | * The third line is the same as the first line. | |
186 | * | |
187 | * The fourth line disables tagged queueing for devices 0 and 3. It | |
188 | * enables tagged queueing for the other IDs, with 16 commands/LUN | |
189 | * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for | |
190 | * IDs 2, 5-7, and 9-15. | |
191 | */ | |
192 | ||
193 | /* | |
194 | * NOTE: The below structure is for reference only, the actual structure | |
195 | * to modify in order to change things is just below this comment block. | |
196 | adapter_tag_info_t aic7xxx_tag_info[] = | |
197 | { | |
198 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
199 | {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, | |
200 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
201 | {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} | |
202 | }; | |
203 | */ | |
204 | ||
205 | #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE | |
206 | #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE | |
207 | #else | |
208 | #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE | |
209 | #endif | |
210 | ||
211 | #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ | |
212 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
213 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
214 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
215 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
216 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
217 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
218 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
219 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ | |
220 | } | |
221 | ||
222 | /* | |
223 | * By default, use the number of commands specified by | |
224 | * the users kernel configuration. | |
225 | */ | |
226 | static adapter_tag_info_t aic7xxx_tag_info[] = | |
227 | { | |
228 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
229 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
230 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
231 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
232 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
233 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
234 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
235 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
236 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
237 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
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 | }; | |
245 | ||
1da177e4 LT |
246 | /* |
247 | * There should be a specific return value for this in scsi.h, but | |
248 | * it seems that most drivers ignore it. | |
249 | */ | |
250 | #define DID_UNDERFLOW DID_ERROR | |
251 | ||
252 | void | |
253 | ahc_print_path(struct ahc_softc *ahc, struct scb *scb) | |
254 | { | |
255 | printk("(scsi%d:%c:%d:%d): ", | |
256 | ahc->platform_data->host->host_no, | |
257 | scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', | |
258 | scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, | |
259 | scb != NULL ? SCB_GET_LUN(scb) : -1); | |
260 | } | |
261 | ||
262 | /* | |
263 | * XXX - these options apply unilaterally to _all_ 274x/284x/294x | |
264 | * cards in the system. This should be fixed. Exceptions to this | |
265 | * rule are noted in the comments. | |
266 | */ | |
267 | ||
268 | /* | |
269 | * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This | |
270 | * has no effect on any later resets that might occur due to things like | |
271 | * SCSI bus timeouts. | |
272 | */ | |
273 | static uint32_t aic7xxx_no_reset; | |
274 | ||
1da177e4 LT |
275 | /* |
276 | * Should we force EXTENDED translation on a controller. | |
277 | * 0 == Use whatever is in the SEEPROM or default to off | |
278 | * 1 == Use whatever is in the SEEPROM or default to on | |
279 | */ | |
280 | static uint32_t aic7xxx_extended; | |
281 | ||
282 | /* | |
283 | * PCI bus parity checking of the Adaptec controllers. This is somewhat | |
284 | * dubious at best. To my knowledge, this option has never actually | |
285 | * solved a PCI parity problem, but on certain machines with broken PCI | |
286 | * chipset configurations where stray PCI transactions with bad parity are | |
25985edc | 287 | * the norm rather than the exception, the error messages can be overwhelming. |
1da177e4 LT |
288 | * It's included in the driver for completeness. |
289 | * 0 = Shut off PCI parity check | |
290 | * non-0 = reverse polarity pci parity checking | |
291 | */ | |
292 | static uint32_t aic7xxx_pci_parity = ~0; | |
293 | ||
1da177e4 LT |
294 | /* |
295 | * There are lots of broken chipsets in the world. Some of them will | |
296 | * violate the PCI spec when we issue byte sized memory writes to our | |
297 | * controller. I/O mapped register access, if allowed by the given | |
298 | * platform, will work in almost all cases. | |
299 | */ | |
300 | uint32_t aic7xxx_allow_memio = ~0; | |
301 | ||
1da177e4 LT |
302 | /* |
303 | * So that we can set how long each device is given as a selection timeout. | |
304 | * The table of values goes like this: | |
305 | * 0 - 256ms | |
306 | * 1 - 128ms | |
307 | * 2 - 64ms | |
308 | * 3 - 32ms | |
309 | * We default to 256ms because some older devices need a longer time | |
310 | * to respond to initial selection. | |
311 | */ | |
312 | static uint32_t aic7xxx_seltime; | |
313 | ||
314 | /* | |
315 | * Certain devices do not perform any aging on commands. Should the | |
316 | * device be saturated by commands in one portion of the disk, it is | |
317 | * possible for transactions on far away sectors to never be serviced. | |
318 | * To handle these devices, we can periodically send an ordered tag to | |
319 | * force all outstanding transactions to be serviced prior to a new | |
320 | * transaction. | |
321 | */ | |
289fe5b1 | 322 | static uint32_t aic7xxx_periodic_otag; |
1da177e4 LT |
323 | |
324 | /* | |
325 | * Module information and settable options. | |
326 | */ | |
327 | static char *aic7xxx = NULL; | |
328 | ||
64624d4f HR |
329 | MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); |
330 | MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver"); | |
1da177e4 LT |
331 | MODULE_LICENSE("Dual BSD/GPL"); |
332 | MODULE_VERSION(AIC7XXX_DRIVER_VERSION); | |
333 | module_param(aic7xxx, charp, 0444); | |
334 | MODULE_PARM_DESC(aic7xxx, | |
2b6ee9b5 | 335 | "period-delimited options string:\n" |
1da177e4 LT |
336 | " verbose Enable verbose/diagnostic logging\n" |
337 | " allow_memio Allow device registers to be memory mapped\n" | |
338 | " debug Bitmask of debug values to enable\n" | |
339 | " no_probe Toggle EISA/VLB controller probing\n" | |
340 | " probe_eisa_vl Toggle EISA/VLB controller probing\n" | |
b1c11812 | 341 | " no_reset Suppress initial bus resets\n" |
1da177e4 LT |
342 | " extended Enable extended geometry on all controllers\n" |
343 | " periodic_otag Send an ordered tagged transaction\n" | |
344 | " periodically to prevent tag starvation.\n" | |
345 | " This may be required by some older disk\n" | |
346 | " drives or RAID arrays.\n" | |
1da177e4 LT |
347 | " tag_info:<tag_str> Set per-target tag depth\n" |
348 | " global_tag_depth:<int> Global tag depth for every target\n" | |
349 | " on every bus\n" | |
1da177e4 LT |
350 | " seltime:<int> Selection Timeout\n" |
351 | " (0/256ms,1/128ms,2/64ms,3/32ms)\n" | |
352 | "\n" | |
970e2486 LDM |
353 | " Sample modprobe configuration file:\n" |
354 | " # Toggle EISA/VLB probing\n" | |
355 | " # Set tag depth on Controller 1/Target 1 to 10 tags\n" | |
356 | " # Shorten the selection timeout to 128ms\n" | |
1da177e4 LT |
357 | "\n" |
358 | " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" | |
359 | ); | |
360 | ||
361 | static void ahc_linux_handle_scsi_status(struct ahc_softc *, | |
b1abb4d6 | 362 | struct scsi_device *, |
1da177e4 LT |
363 | struct scb *); |
364 | static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, | |
013791ee | 365 | struct scsi_cmnd *cmd); |
1da177e4 | 366 | static void ahc_linux_freeze_simq(struct ahc_softc *ahc); |
dacee84b | 367 | static void ahc_linux_release_simq(struct ahc_softc *ahc); |
013791ee | 368 | static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); |
1da177e4 | 369 | static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); |
1da177e4 LT |
370 | static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, |
371 | struct ahc_devinfo *devinfo); | |
b1abb4d6 | 372 | static void ahc_linux_device_queue_depth(struct scsi_device *); |
e4e360c3 JB |
373 | static int ahc_linux_run_command(struct ahc_softc*, |
374 | struct ahc_linux_device *, | |
375 | struct scsi_cmnd *); | |
1da177e4 | 376 | static void ahc_linux_setup_tag_info_global(char *p); |
1da177e4 | 377 | static int aic7xxx_setup(char *s); |
2a40342e CH |
378 | |
379 | static int ahc_linux_unit; | |
380 | ||
1da177e4 | 381 | |
be0d6768 DV |
382 | /************************** OS Utility Wrappers *******************************/ |
383 | void | |
384 | ahc_delay(long usec) | |
385 | { | |
386 | /* | |
387 | * udelay on Linux can have problems for | |
388 | * multi-millisecond waits. Wait at most | |
389 | * 1024us per call. | |
390 | */ | |
391 | while (usec > 0) { | |
392 | udelay(usec % 1024); | |
393 | usec -= 1024; | |
394 | } | |
395 | } | |
396 | ||
397 | /***************************** Low Level I/O **********************************/ | |
398 | uint8_t | |
399 | ahc_inb(struct ahc_softc * ahc, long port) | |
400 | { | |
401 | uint8_t x; | |
402 | ||
403 | if (ahc->tag == BUS_SPACE_MEMIO) { | |
404 | x = readb(ahc->bsh.maddr + port); | |
405 | } else { | |
406 | x = inb(ahc->bsh.ioport + port); | |
407 | } | |
408 | mb(); | |
409 | return (x); | |
410 | } | |
411 | ||
412 | void | |
413 | ahc_outb(struct ahc_softc * ahc, long port, uint8_t val) | |
414 | { | |
415 | if (ahc->tag == BUS_SPACE_MEMIO) { | |
416 | writeb(val, ahc->bsh.maddr + port); | |
417 | } else { | |
418 | outb(val, ahc->bsh.ioport + port); | |
419 | } | |
420 | mb(); | |
421 | } | |
422 | ||
423 | void | |
424 | ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count) | |
425 | { | |
426 | int i; | |
427 | ||
428 | /* | |
429 | * There is probably a more efficient way to do this on Linux | |
430 | * but we don't use this for anything speed critical and this | |
431 | * should work. | |
432 | */ | |
433 | for (i = 0; i < count; i++) | |
434 | ahc_outb(ahc, port, *array++); | |
435 | } | |
436 | ||
437 | void | |
438 | ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count) | |
439 | { | |
440 | int i; | |
441 | ||
442 | /* | |
443 | * There is probably a more efficient way to do this on Linux | |
444 | * but we don't use this for anything speed critical and this | |
445 | * should work. | |
446 | */ | |
447 | for (i = 0; i < count; i++) | |
448 | *array++ = ahc_inb(ahc, port); | |
449 | } | |
450 | ||
1da177e4 | 451 | /********************************* Inlines ************************************/ |
be0d6768 | 452 | static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); |
1da177e4 | 453 | |
be0d6768 | 454 | static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, |
1da177e4 LT |
455 | struct ahc_dma_seg *sg, |
456 | dma_addr_t addr, bus_size_t len); | |
457 | ||
be0d6768 | 458 | static void |
1da177e4 LT |
459 | ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) |
460 | { | |
013791ee | 461 | struct scsi_cmnd *cmd; |
1da177e4 LT |
462 | |
463 | cmd = scb->io_ctx; | |
464 | ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); | |
3a57c4a5 FT |
465 | |
466 | scsi_dma_unmap(cmd); | |
1da177e4 LT |
467 | } |
468 | ||
be0d6768 | 469 | static int |
1da177e4 LT |
470 | ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, |
471 | struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) | |
472 | { | |
473 | int consumed; | |
474 | ||
475 | if ((scb->sg_count + 1) > AHC_NSEG) | |
476 | panic("Too few segs for dma mapping. " | |
477 | "Increase AHC_NSEG\n"); | |
478 | ||
479 | consumed = 1; | |
480 | sg->addr = ahc_htole32(addr & 0xFFFFFFFF); | |
481 | scb->platform_data->xfer_len += len; | |
482 | ||
483 | if (sizeof(dma_addr_t) > 4 | |
484 | && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) | |
485 | len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; | |
486 | ||
487 | sg->len = ahc_htole32(len); | |
488 | return (consumed); | |
489 | } | |
490 | ||
1da177e4 LT |
491 | /* |
492 | * Return a string describing the driver. | |
493 | */ | |
494 | static const char * | |
495 | ahc_linux_info(struct Scsi_Host *host) | |
496 | { | |
497 | static char buffer[512]; | |
498 | char ahc_info[256]; | |
499 | char *bp; | |
500 | struct ahc_softc *ahc; | |
501 | ||
502 | bp = &buffer[0]; | |
503 | ahc = *(struct ahc_softc **)host->hostdata; | |
504 | memset(bp, 0, sizeof(buffer)); | |
980b306a DV |
505 | strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n" |
506 | " <"); | |
1da177e4 | 507 | strcat(bp, ahc->description); |
980b306a DV |
508 | strcat(bp, ">\n" |
509 | " "); | |
1da177e4 LT |
510 | ahc_controller_info(ahc, ahc_info); |
511 | strcat(bp, ahc_info); | |
512 | strcat(bp, "\n"); | |
513 | ||
514 | return (bp); | |
515 | } | |
516 | ||
517 | /* | |
518 | * Queue an SCB to the controller. | |
519 | */ | |
520 | static int | |
f281233d | 521 | ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) |
1da177e4 LT |
522 | { |
523 | struct ahc_softc *ahc; | |
b1abb4d6 | 524 | struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); |
6d5e9fd1 CH |
525 | int rtn = SCSI_MLQUEUE_HOST_BUSY; |
526 | unsigned long flags; | |
1da177e4 LT |
527 | |
528 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
529 | ||
6d5e9fd1 CH |
530 | ahc_lock(ahc, &flags); |
531 | if (ahc->platform_data->qfrozen == 0) { | |
532 | cmd->scsi_done = scsi_done; | |
533 | cmd->result = CAM_REQ_INPROG << 16; | |
534 | rtn = ahc_linux_run_command(ahc, dev, cmd); | |
535 | } | |
536 | ahc_unlock(ahc, &flags); | |
e4e360c3 | 537 | |
6d5e9fd1 | 538 | return rtn; |
1da177e4 LT |
539 | } |
540 | ||
f281233d JG |
541 | static DEF_SCSI_QCMD(ahc_linux_queue) |
542 | ||
b1abb4d6 JB |
543 | static inline struct scsi_target ** |
544 | ahc_linux_target_in_softc(struct scsi_target *starget) | |
1da177e4 | 545 | { |
b1abb4d6 JB |
546 | struct ahc_softc *ahc = |
547 | *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); | |
fb3089df | 548 | unsigned int target_offset; |
b1abb4d6 JB |
549 | |
550 | target_offset = starget->id; | |
551 | if (starget->channel != 0) | |
552 | target_offset += 8; | |
553 | ||
554 | return &ahc->platform_data->starget[target_offset]; | |
555 | } | |
556 | ||
557 | static int | |
558 | ahc_linux_target_alloc(struct scsi_target *starget) | |
559 | { | |
560 | struct ahc_softc *ahc = | |
561 | *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); | |
562 | struct seeprom_config *sc = ahc->seep_config; | |
fb3089df | 563 | unsigned long flags; |
b1abb4d6 | 564 | struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); |
b1abb4d6 JB |
565 | unsigned short scsirate; |
566 | struct ahc_devinfo devinfo; | |
567 | struct ahc_initiator_tinfo *tinfo; | |
568 | struct ahc_tmode_tstate *tstate; | |
569 | char channel = starget->channel + 'A'; | |
570 | unsigned int our_id = ahc->our_id; | |
571 | unsigned int target_offset; | |
c7525233 JB |
572 | |
573 | target_offset = starget->id; | |
574 | if (starget->channel != 0) | |
575 | target_offset += 8; | |
b1abb4d6 JB |
576 | |
577 | if (starget->channel) | |
578 | our_id = ahc->our_id_b; | |
1da177e4 | 579 | |
fb3089df | 580 | ahc_lock(ahc, &flags); |
fb3089df | 581 | |
b1abb4d6 | 582 | BUG_ON(*ahc_targp != NULL); |
c7525233 | 583 | |
b1abb4d6 | 584 | *ahc_targp = starget; |
c7525233 | 585 | |
b1abb4d6 | 586 | if (sc) { |
12021fff JB |
587 | int maxsync = AHC_SYNCRATE_DT; |
588 | int ultra = 0; | |
589 | int flags = sc->device_flags[target_offset]; | |
590 | ||
591 | if (ahc->flags & AHC_NEWEEPROM_FMT) { | |
592 | if (flags & CFSYNCHISULTRA) | |
593 | ultra = 1; | |
594 | } else if (flags & CFULTRAEN) | |
595 | ultra = 1; | |
596 | /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 | |
597 | * change it to ultra=0, CFXFER = 0 */ | |
598 | if(ultra && (flags & CFXFER) == 0x04) { | |
599 | ultra = 0; | |
600 | flags &= ~CFXFER; | |
601 | } | |
602 | ||
b1abb4d6 | 603 | if ((ahc->features & AHC_ULTRA2) != 0) { |
12021fff | 604 | scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); |
b1abb4d6 | 605 | } else { |
12021fff JB |
606 | scsirate = (flags & CFXFER) << 4; |
607 | maxsync = ultra ? AHC_SYNCRATE_ULTRA : | |
608 | AHC_SYNCRATE_FAST; | |
c7525233 | 609 | } |
12021fff JB |
610 | spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; |
611 | if (!(flags & CFSYNCH)) | |
612 | spi_max_offset(starget) = 0; | |
b1abb4d6 | 613 | spi_min_period(starget) = |
12021fff JB |
614 | ahc_find_period(ahc, scsirate, maxsync); |
615 | ||
b1abb4d6 JB |
616 | tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, |
617 | starget->id, &tstate); | |
c7525233 | 618 | } |
b1abb4d6 JB |
619 | ahc_compile_devinfo(&devinfo, our_id, starget->id, |
620 | CAM_LUN_WILDCARD, channel, | |
621 | ROLE_INITIATOR); | |
622 | ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, | |
623 | AHC_TRANS_GOAL, /*paused*/FALSE); | |
624 | ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, | |
625 | AHC_TRANS_GOAL, /*paused*/FALSE); | |
fb3089df | 626 | ahc_unlock(ahc, &flags); |
b1abb4d6 JB |
627 | |
628 | return 0; | |
629 | } | |
630 | ||
631 | static void | |
632 | ahc_linux_target_destroy(struct scsi_target *starget) | |
633 | { | |
634 | struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); | |
635 | ||
636 | *ahc_targp = NULL; | |
637 | } | |
638 | ||
639 | static int | |
640 | ahc_linux_slave_alloc(struct scsi_device *sdev) | |
641 | { | |
642 | struct ahc_softc *ahc = | |
643 | *((struct ahc_softc **)sdev->host->hostdata); | |
644 | struct scsi_target *starget = sdev->sdev_target; | |
b1abb4d6 JB |
645 | struct ahc_linux_device *dev; |
646 | ||
647 | if (bootverbose) | |
48813cf9 | 648 | printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); |
b1abb4d6 | 649 | |
b1abb4d6 JB |
650 | dev = scsi_transport_device_data(sdev); |
651 | memset(dev, 0, sizeof(*dev)); | |
652 | ||
653 | /* | |
654 | * We start out life using untagged | |
655 | * transactions of which we allow one. | |
656 | */ | |
657 | dev->openings = 1; | |
658 | ||
659 | /* | |
660 | * Set maxtags to 0. This will be changed if we | |
661 | * later determine that we are dealing with | |
662 | * a tagged queuing capable device. | |
663 | */ | |
664 | dev->maxtags = 0; | |
665 | ||
79778a27 JB |
666 | spi_period(starget) = 0; |
667 | ||
b1abb4d6 | 668 | return 0; |
1da177e4 LT |
669 | } |
670 | ||
671 | static int | |
b1abb4d6 | 672 | ahc_linux_slave_configure(struct scsi_device *sdev) |
1da177e4 LT |
673 | { |
674 | struct ahc_softc *ahc; | |
1da177e4 | 675 | |
b1abb4d6 | 676 | ahc = *((struct ahc_softc **)sdev->host->hostdata); |
c7525233 | 677 | |
1da177e4 | 678 | if (bootverbose) |
017560fc | 679 | sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); |
c7525233 | 680 | |
b1abb4d6 | 681 | ahc_linux_device_queue_depth(sdev); |
cb624029 | 682 | |
683 | /* Initial Domain Validation */ | |
b1abb4d6 JB |
684 | if (!spi_initial_dv(sdev->sdev_target)) |
685 | spi_dv_device(sdev); | |
cb624029 | 686 | |
c7525233 | 687 | return 0; |
1da177e4 LT |
688 | } |
689 | ||
1da177e4 LT |
690 | #if defined(__i386__) |
691 | /* | |
692 | * Return the disk geometry for the given SCSI device. | |
693 | */ | |
694 | static int | |
1da177e4 LT |
695 | ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
696 | sector_t capacity, int geom[]) | |
697 | { | |
698 | uint8_t *bh; | |
1da177e4 LT |
699 | int heads; |
700 | int sectors; | |
701 | int cylinders; | |
702 | int ret; | |
703 | int extended; | |
704 | struct ahc_softc *ahc; | |
705 | u_int channel; | |
706 | ||
707 | ahc = *((struct ahc_softc **)sdev->host->hostdata); | |
422c0d61 | 708 | channel = sdev_channel(sdev); |
1da177e4 | 709 | |
1da177e4 | 710 | bh = scsi_bios_ptable(bdev); |
1da177e4 LT |
711 | if (bh) { |
712 | ret = scsi_partsize(bh, capacity, | |
713 | &geom[2], &geom[0], &geom[1]); | |
1da177e4 | 714 | kfree(bh); |
1da177e4 LT |
715 | if (ret != -1) |
716 | return (ret); | |
717 | } | |
718 | heads = 64; | |
719 | sectors = 32; | |
720 | cylinders = aic_sector_div(capacity, heads, sectors); | |
721 | ||
722 | if (aic7xxx_extended != 0) | |
723 | extended = 1; | |
724 | else if (channel == 0) | |
725 | extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; | |
726 | else | |
727 | extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; | |
728 | if (extended && cylinders >= 1024) { | |
729 | heads = 255; | |
730 | sectors = 63; | |
731 | cylinders = aic_sector_div(capacity, heads, sectors); | |
732 | } | |
733 | geom[0] = heads; | |
734 | geom[1] = sectors; | |
735 | geom[2] = cylinders; | |
736 | return (0); | |
737 | } | |
738 | #endif | |
739 | ||
740 | /* | |
741 | * Abort the current SCSI command(s). | |
742 | */ | |
743 | static int | |
013791ee | 744 | ahc_linux_abort(struct scsi_cmnd *cmd) |
1da177e4 LT |
745 | { |
746 | int error; | |
747 | ||
748 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); | |
749 | if (error != 0) | |
48813cf9 | 750 | printk("aic7xxx_abort returns 0x%x\n", error); |
1da177e4 LT |
751 | return (error); |
752 | } | |
753 | ||
754 | /* | |
755 | * Attempt to send a target reset message to the device that timed out. | |
756 | */ | |
757 | static int | |
013791ee | 758 | ahc_linux_dev_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
759 | { |
760 | int error; | |
761 | ||
762 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); | |
763 | if (error != 0) | |
48813cf9 | 764 | printk("aic7xxx_dev_reset returns 0x%x\n", error); |
1da177e4 LT |
765 | return (error); |
766 | } | |
767 | ||
768 | /* | |
769 | * Reset the SCSI bus. | |
770 | */ | |
771 | static int | |
013791ee | 772 | ahc_linux_bus_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
773 | { |
774 | struct ahc_softc *ahc; | |
1da177e4 | 775 | int found; |
68b3aa7c | 776 | unsigned long flags; |
1da177e4 LT |
777 | |
778 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
68b3aa7c JG |
779 | |
780 | ahc_lock(ahc, &flags); | |
422c0d61 | 781 | found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', |
1da177e4 | 782 | /*initiate reset*/TRUE); |
68b3aa7c | 783 | ahc_unlock(ahc, &flags); |
1da177e4 LT |
784 | |
785 | if (bootverbose) | |
48813cf9 | 786 | printk("%s: SCSI bus reset delivered. " |
1da177e4 LT |
787 | "%d SCBs aborted.\n", ahc_name(ahc), found); |
788 | ||
789 | return SUCCESS; | |
790 | } | |
791 | ||
013791ee | 792 | struct scsi_host_template aic7xxx_driver_template = { |
1da177e4 LT |
793 | .module = THIS_MODULE, |
794 | .name = "aic7xxx", | |
dfd287f6 | 795 | .proc_name = "aic7xxx", |
6b3a8bbf AV |
796 | .show_info = ahc_linux_show_info, |
797 | .write_info = ahc_proc_write_seeprom, | |
1da177e4 LT |
798 | .info = ahc_linux_info, |
799 | .queuecommand = ahc_linux_queue, | |
800 | .eh_abort_handler = ahc_linux_abort, | |
801 | .eh_device_reset_handler = ahc_linux_dev_reset, | |
802 | .eh_bus_reset_handler = ahc_linux_bus_reset, | |
803 | #if defined(__i386__) | |
804 | .bios_param = ahc_linux_biosparam, | |
805 | #endif | |
806 | .can_queue = AHC_MAX_QUEUE, | |
807 | .this_id = -1, | |
80f1443c | 808 | .max_sectors = 8192, |
1da177e4 LT |
809 | .cmd_per_lun = 2, |
810 | .use_clustering = ENABLE_CLUSTERING, | |
811 | .slave_alloc = ahc_linux_slave_alloc, | |
812 | .slave_configure = ahc_linux_slave_configure, | |
b1abb4d6 JB |
813 | .target_alloc = ahc_linux_target_alloc, |
814 | .target_destroy = ahc_linux_target_destroy, | |
1da177e4 LT |
815 | }; |
816 | ||
817 | /**************************** Tasklet Handler *********************************/ | |
818 | ||
1da177e4 LT |
819 | /******************************** Macros **************************************/ |
820 | #define BUILD_SCSIID(ahc, cmd) \ | |
821 | ((((cmd)->device->id << TID_SHIFT) & TID) \ | |
822 | | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ | |
823 | | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) | |
824 | ||
825 | /******************************** Bus DMA *************************************/ | |
826 | int | |
827 | ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, | |
828 | bus_size_t alignment, bus_size_t boundary, | |
829 | dma_addr_t lowaddr, dma_addr_t highaddr, | |
830 | bus_dma_filter_t *filter, void *filterarg, | |
831 | bus_size_t maxsize, int nsegments, | |
832 | bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) | |
833 | { | |
834 | bus_dma_tag_t dmat; | |
835 | ||
48813cf9 | 836 | dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); |
1da177e4 LT |
837 | if (dmat == NULL) |
838 | return (ENOMEM); | |
839 | ||
840 | /* | |
841 | * Linux is very simplistic about DMA memory. For now don't | |
842 | * maintain all specification information. Once Linux supplies | |
843 | * better facilities for doing these operations, or the | |
844 | * needs of this particular driver change, we might need to do | |
845 | * more here. | |
846 | */ | |
847 | dmat->alignment = alignment; | |
848 | dmat->boundary = boundary; | |
849 | dmat->maxsize = maxsize; | |
850 | *ret_tag = dmat; | |
851 | return (0); | |
852 | } | |
853 | ||
854 | void | |
855 | ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) | |
856 | { | |
48813cf9 | 857 | kfree(dmat); |
1da177e4 LT |
858 | } |
859 | ||
860 | int | |
861 | ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, | |
862 | int flags, bus_dmamap_t *mapp) | |
863 | { | |
1da177e4 | 864 | *vaddr = pci_alloc_consistent(ahc->dev_softc, |
7dfa0f26 | 865 | dmat->maxsize, mapp); |
1da177e4 | 866 | if (*vaddr == NULL) |
7dfa0f26 CH |
867 | return ENOMEM; |
868 | return 0; | |
1da177e4 LT |
869 | } |
870 | ||
871 | void | |
872 | ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, | |
873 | void* vaddr, bus_dmamap_t map) | |
874 | { | |
875 | pci_free_consistent(ahc->dev_softc, dmat->maxsize, | |
7dfa0f26 | 876 | vaddr, map); |
1da177e4 LT |
877 | } |
878 | ||
879 | int | |
880 | ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, | |
881 | void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, | |
882 | void *cb_arg, int flags) | |
883 | { | |
884 | /* | |
885 | * Assume for now that this will only be used during | |
886 | * initialization and not for per-transaction buffer mapping. | |
887 | */ | |
888 | bus_dma_segment_t stack_sg; | |
889 | ||
7dfa0f26 | 890 | stack_sg.ds_addr = map; |
1da177e4 LT |
891 | stack_sg.ds_len = dmat->maxsize; |
892 | cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); | |
893 | return (0); | |
894 | } | |
895 | ||
896 | void | |
897 | ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | |
898 | { | |
1da177e4 LT |
899 | } |
900 | ||
901 | int | |
902 | ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | |
903 | { | |
904 | /* Nothing to do */ | |
905 | return (0); | |
906 | } | |
907 | ||
1da177e4 LT |
908 | static void |
909 | ahc_linux_setup_tag_info_global(char *p) | |
910 | { | |
911 | int tags, i, j; | |
912 | ||
913 | tags = simple_strtoul(p + 1, NULL, 0) & 0xff; | |
48813cf9 | 914 | printk("Setting Global Tags= %d\n", tags); |
1da177e4 | 915 | |
6391a113 | 916 | for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { |
1da177e4 LT |
917 | for (j = 0; j < AHC_NUM_TARGETS; j++) { |
918 | aic7xxx_tag_info[i].tag_commands[j] = tags; | |
919 | } | |
920 | } | |
921 | } | |
922 | ||
923 | static void | |
924 | ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) | |
925 | { | |
926 | ||
927 | if ((instance >= 0) && (targ >= 0) | |
6391a113 | 928 | && (instance < ARRAY_SIZE(aic7xxx_tag_info)) |
1da177e4 LT |
929 | && (targ < AHC_NUM_TARGETS)) { |
930 | aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; | |
931 | if (bootverbose) | |
48813cf9 | 932 | printk("tag_info[%d:%d] = %d\n", instance, targ, value); |
1da177e4 LT |
933 | } |
934 | } | |
935 | ||
1ff92730 CH |
936 | static char * |
937 | ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, | |
938 | void (*callback)(u_long, int, int, int32_t), | |
939 | u_long callback_arg) | |
940 | { | |
941 | char *tok_end; | |
942 | char *tok_end2; | |
943 | int i; | |
944 | int instance; | |
945 | int targ; | |
946 | int done; | |
947 | char tok_list[] = {'.', ',', '{', '}', '\0'}; | |
948 | ||
949 | /* All options use a ':' name/arg separator */ | |
950 | if (*opt_arg != ':') | |
951 | return (opt_arg); | |
952 | opt_arg++; | |
953 | instance = -1; | |
954 | targ = -1; | |
955 | done = FALSE; | |
956 | /* | |
957 | * Restore separator that may be in | |
958 | * the middle of our option argument. | |
959 | */ | |
960 | tok_end = strchr(opt_arg, '\0'); | |
961 | if (tok_end < end) | |
962 | *tok_end = ','; | |
963 | while (!done) { | |
964 | switch (*opt_arg) { | |
965 | case '{': | |
966 | if (instance == -1) { | |
967 | instance = 0; | |
968 | } else { | |
969 | if (depth > 1) { | |
970 | if (targ == -1) | |
971 | targ = 0; | |
972 | } else { | |
48813cf9 | 973 | printk("Malformed Option %s\n", |
1ff92730 CH |
974 | opt_name); |
975 | done = TRUE; | |
976 | } | |
977 | } | |
978 | opt_arg++; | |
979 | break; | |
980 | case '}': | |
981 | if (targ != -1) | |
982 | targ = -1; | |
983 | else if (instance != -1) | |
984 | instance = -1; | |
985 | opt_arg++; | |
986 | break; | |
987 | case ',': | |
988 | case '.': | |
989 | if (instance == -1) | |
990 | done = TRUE; | |
991 | else if (targ >= 0) | |
992 | targ++; | |
993 | else if (instance >= 0) | |
994 | instance++; | |
995 | opt_arg++; | |
996 | break; | |
997 | case '\0': | |
998 | done = TRUE; | |
999 | break; | |
1000 | default: | |
1001 | tok_end = end; | |
1002 | for (i = 0; tok_list[i]; i++) { | |
1003 | tok_end2 = strchr(opt_arg, tok_list[i]); | |
1004 | if ((tok_end2) && (tok_end2 < tok_end)) | |
1005 | tok_end = tok_end2; | |
1006 | } | |
1007 | callback(callback_arg, instance, targ, | |
1008 | simple_strtol(opt_arg, NULL, 0)); | |
1009 | opt_arg = tok_end; | |
1010 | break; | |
1011 | } | |
1012 | } | |
1013 | return (opt_arg); | |
1014 | } | |
1015 | ||
1da177e4 LT |
1016 | /* |
1017 | * Handle Linux boot parameters. This routine allows for assigning a value | |
1018 | * to a parameter with a ':' between the parameter and the value. | |
1019 | * ie. aic7xxx=stpwlev:1,extended | |
1020 | */ | |
1021 | static int | |
1022 | aic7xxx_setup(char *s) | |
1023 | { | |
1024 | int i, n; | |
1025 | char *p; | |
1026 | char *end; | |
1027 | ||
980b306a | 1028 | static const struct { |
1da177e4 LT |
1029 | const char *name; |
1030 | uint32_t *flag; | |
1031 | } options[] = { | |
1032 | { "extended", &aic7xxx_extended }, | |
1033 | { "no_reset", &aic7xxx_no_reset }, | |
1034 | { "verbose", &aic7xxx_verbose }, | |
1035 | { "allow_memio", &aic7xxx_allow_memio}, | |
1036 | #ifdef AHC_DEBUG | |
1037 | { "debug", &ahc_debug }, | |
1038 | #endif | |
1da177e4 LT |
1039 | { "periodic_otag", &aic7xxx_periodic_otag }, |
1040 | { "pci_parity", &aic7xxx_pci_parity }, | |
1041 | { "seltime", &aic7xxx_seltime }, | |
1042 | { "tag_info", NULL }, | |
1043 | { "global_tag_depth", NULL }, | |
1044 | { "dv", NULL } | |
1045 | }; | |
1046 | ||
1047 | end = strchr(s, '\0'); | |
1048 | ||
1049 | /* | |
6391a113 | 1050 | * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE |
1da177e4 LT |
1051 | * will never be 0 in this case. |
1052 | */ | |
1053 | n = 0; | |
1054 | ||
1055 | while ((p = strsep(&s, ",.")) != NULL) { | |
1056 | if (*p == '\0') | |
1057 | continue; | |
6391a113 | 1058 | for (i = 0; i < ARRAY_SIZE(options); i++) { |
1da177e4 LT |
1059 | |
1060 | n = strlen(options[i].name); | |
1061 | if (strncmp(options[i].name, p, n) == 0) | |
1062 | break; | |
1063 | } | |
6391a113 | 1064 | if (i == ARRAY_SIZE(options)) |
1da177e4 LT |
1065 | continue; |
1066 | ||
1067 | if (strncmp(p, "global_tag_depth", n) == 0) { | |
1068 | ahc_linux_setup_tag_info_global(p + n); | |
1069 | } else if (strncmp(p, "tag_info", n) == 0) { | |
1ff92730 | 1070 | s = ahc_parse_brace_option("tag_info", p + n, end, |
1da177e4 | 1071 | 2, ahc_linux_setup_tag_info, 0); |
1da177e4 LT |
1072 | } else if (p[n] == ':') { |
1073 | *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); | |
1074 | } else if (strncmp(p, "verbose", n) == 0) { | |
1075 | *(options[i].flag) = 1; | |
1076 | } else { | |
1077 | *(options[i].flag) ^= 0xFFFFFFFF; | |
1078 | } | |
1079 | } | |
1080 | return 1; | |
1081 | } | |
1082 | ||
1083 | __setup("aic7xxx=", aic7xxx_setup); | |
1084 | ||
1085 | uint32_t aic7xxx_verbose; | |
1086 | ||
1087 | int | |
013791ee | 1088 | ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) |
1da177e4 | 1089 | { |
9e1fe931 JJ |
1090 | char buf[80]; |
1091 | struct Scsi_Host *host; | |
1da177e4 | 1092 | char *new_name; |
9e1fe931 JJ |
1093 | u_long s; |
1094 | int retval; | |
1da177e4 LT |
1095 | |
1096 | template->name = ahc->description; | |
1097 | host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); | |
1098 | if (host == NULL) | |
1099 | return (ENOMEM); | |
1100 | ||
1101 | *((struct ahc_softc **)host->hostdata) = ahc; | |
1da177e4 LT |
1102 | ahc->platform_data->host = host; |
1103 | host->can_queue = AHC_MAX_QUEUE; | |
1104 | host->cmd_per_lun = 2; | |
1105 | /* XXX No way to communicate the ID for multiple channels */ | |
1106 | host->this_id = ahc->our_id; | |
1107 | host->irq = ahc->platform_data->irq; | |
1108 | host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; | |
1109 | host->max_lun = AHC_NUM_LUNS; | |
1110 | host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; | |
1111 | host->sg_tablesize = AHC_NSEG; | |
dacee84b | 1112 | ahc_lock(ahc, &s); |
2a40342e | 1113 | ahc_set_unit(ahc, ahc_linux_unit++); |
dacee84b | 1114 | ahc_unlock(ahc, &s); |
1da177e4 | 1115 | sprintf(buf, "scsi%d", host->host_no); |
48813cf9 | 1116 | new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); |
1da177e4 LT |
1117 | if (new_name != NULL) { |
1118 | strcpy(new_name, buf); | |
1119 | ahc_set_name(ahc, new_name); | |
1120 | } | |
1121 | host->unique_id = ahc->unit; | |
1da177e4 | 1122 | ahc_linux_initialize_scsi_bus(ahc); |
1da177e4 | 1123 | ahc_intr_enable(ahc, TRUE); |
1da177e4 | 1124 | |
92d161c3 | 1125 | host->transportt = ahc_linux_transport_template; |
1126 | ||
9e1fe931 JJ |
1127 | retval = scsi_add_host(host, |
1128 | (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); | |
1129 | if (retval) { | |
1130 | printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); | |
1131 | scsi_host_put(host); | |
1132 | return retval; | |
1133 | } | |
1134 | ||
1da177e4 | 1135 | scsi_scan_host(host); |
9e1fe931 | 1136 | return 0; |
1da177e4 LT |
1137 | } |
1138 | ||
1da177e4 LT |
1139 | /* |
1140 | * Place the SCSI bus into a known state by either resetting it, | |
1141 | * or forcing transfer negotiations on the next command to any | |
1142 | * target. | |
1143 | */ | |
1144 | void | |
1145 | ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) | |
1146 | { | |
1147 | int i; | |
1148 | int numtarg; | |
dacee84b | 1149 | unsigned long s; |
1da177e4 LT |
1150 | |
1151 | i = 0; | |
1152 | numtarg = 0; | |
1153 | ||
dacee84b JB |
1154 | ahc_lock(ahc, &s); |
1155 | ||
1da177e4 LT |
1156 | if (aic7xxx_no_reset != 0) |
1157 | ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); | |
1158 | ||
1159 | if ((ahc->flags & AHC_RESET_BUS_A) != 0) | |
1160 | ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); | |
1161 | else | |
1162 | numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; | |
1163 | ||
1164 | if ((ahc->features & AHC_TWIN) != 0) { | |
1165 | ||
1166 | if ((ahc->flags & AHC_RESET_BUS_B) != 0) { | |
1167 | ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); | |
1168 | } else { | |
1169 | if (numtarg == 0) | |
1170 | i = 8; | |
1171 | numtarg += 8; | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | /* | |
1176 | * Force negotiation to async for all targets that | |
1177 | * will not see an initial bus reset. | |
1178 | */ | |
1179 | for (; i < numtarg; i++) { | |
1180 | struct ahc_devinfo devinfo; | |
1181 | struct ahc_initiator_tinfo *tinfo; | |
1182 | struct ahc_tmode_tstate *tstate; | |
1183 | u_int our_id; | |
1184 | u_int target_id; | |
1185 | char channel; | |
1186 | ||
1187 | channel = 'A'; | |
1188 | our_id = ahc->our_id; | |
1189 | target_id = i; | |
1190 | if (i > 7 && (ahc->features & AHC_TWIN) != 0) { | |
1191 | channel = 'B'; | |
1192 | our_id = ahc->our_id_b; | |
1193 | target_id = i % 8; | |
1194 | } | |
1195 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, | |
1196 | target_id, &tstate); | |
1197 | ahc_compile_devinfo(&devinfo, our_id, target_id, | |
1198 | CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); | |
1199 | ahc_update_neg_request(ahc, &devinfo, tstate, | |
1200 | tinfo, AHC_NEG_ALWAYS); | |
1201 | } | |
dacee84b | 1202 | ahc_unlock(ahc, &s); |
1da177e4 LT |
1203 | /* Give the bus some time to recover */ |
1204 | if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { | |
1205 | ahc_linux_freeze_simq(ahc); | |
dacee84b JB |
1206 | msleep(AIC7XXX_RESET_DELAY); |
1207 | ahc_linux_release_simq(ahc); | |
1da177e4 LT |
1208 | } |
1209 | } | |
1210 | ||
1211 | int | |
1212 | ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) | |
1213 | { | |
1214 | ||
1215 | ahc->platform_data = | |
114fc1d9 | 1216 | kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC); |
1da177e4 LT |
1217 | if (ahc->platform_data == NULL) |
1218 | return (ENOMEM); | |
1da177e4 | 1219 | ahc->platform_data->irq = AHC_LINUX_NOIRQ; |
1da177e4 | 1220 | ahc_lockinit(ahc); |
1da177e4 LT |
1221 | ahc->seltime = (aic7xxx_seltime & 0x3) << 4; |
1222 | ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; | |
1223 | if (aic7xxx_pci_parity == 0) | |
1224 | ahc->flags |= AHC_DISABLE_PCI_PERR; | |
1225 | ||
1226 | return (0); | |
1227 | } | |
1228 | ||
1229 | void | |
1230 | ahc_platform_free(struct ahc_softc *ahc) | |
1231 | { | |
b1abb4d6 | 1232 | struct scsi_target *starget; |
9080063f | 1233 | int i; |
1da177e4 LT |
1234 | |
1235 | if (ahc->platform_data != NULL) { | |
1da177e4 LT |
1236 | /* destroy all of the device and target objects */ |
1237 | for (i = 0; i < AHC_NUM_TARGETS; i++) { | |
b1abb4d6 JB |
1238 | starget = ahc->platform_data->starget[i]; |
1239 | if (starget != NULL) { | |
b1abb4d6 | 1240 | ahc->platform_data->starget[i] = NULL; |
1da177e4 LT |
1241 | } |
1242 | } | |
1243 | ||
1244 | if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) | |
1245 | free_irq(ahc->platform_data->irq, ahc); | |
1246 | if (ahc->tag == BUS_SPACE_PIO | |
1247 | && ahc->bsh.ioport != 0) | |
1248 | release_region(ahc->bsh.ioport, 256); | |
1249 | if (ahc->tag == BUS_SPACE_MEMIO | |
1250 | && ahc->bsh.maddr != NULL) { | |
1251 | iounmap(ahc->bsh.maddr); | |
1252 | release_mem_region(ahc->platform_data->mem_busaddr, | |
1253 | 0x1000); | |
1254 | } | |
dedd8310 | 1255 | |
97af50f6 JB |
1256 | if (ahc->platform_data->host) |
1257 | scsi_host_put(ahc->platform_data->host); | |
1258 | ||
48813cf9 | 1259 | kfree(ahc->platform_data); |
1da177e4 LT |
1260 | } |
1261 | } | |
1262 | ||
1263 | void | |
1264 | ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) | |
1265 | { | |
1266 | ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), | |
1267 | SCB_GET_CHANNEL(ahc, scb), | |
1268 | SCB_GET_LUN(scb), SCB_LIST_NULL, | |
1269 | ROLE_UNKNOWN, CAM_REQUEUE_REQ); | |
1270 | } | |
1271 | ||
1272 | void | |
9080063f HR |
1273 | ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, |
1274 | struct ahc_devinfo *devinfo, ahc_queue_alg alg) | |
1da177e4 LT |
1275 | { |
1276 | struct ahc_linux_device *dev; | |
1277 | int was_queuing; | |
1278 | int now_queuing; | |
1279 | ||
b1abb4d6 | 1280 | if (sdev == NULL) |
1da177e4 | 1281 | return; |
b1abb4d6 JB |
1282 | dev = scsi_transport_device_data(sdev); |
1283 | ||
1da177e4 LT |
1284 | was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); |
1285 | switch (alg) { | |
1286 | default: | |
1287 | case AHC_QUEUE_NONE: | |
1288 | now_queuing = 0; | |
1289 | break; | |
1290 | case AHC_QUEUE_BASIC: | |
1291 | now_queuing = AHC_DEV_Q_BASIC; | |
1292 | break; | |
1293 | case AHC_QUEUE_TAGGED: | |
1294 | now_queuing = AHC_DEV_Q_TAGGED; | |
1295 | break; | |
1296 | } | |
1297 | if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 | |
1298 | && (was_queuing != now_queuing) | |
1299 | && (dev->active != 0)) { | |
1300 | dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; | |
1301 | dev->qfrozen++; | |
1302 | } | |
1303 | ||
1304 | dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); | |
1305 | if (now_queuing) { | |
1306 | u_int usertags; | |
1307 | ||
1308 | usertags = ahc_linux_user_tagdepth(ahc, devinfo); | |
1309 | if (!was_queuing) { | |
1310 | /* | |
25985edc | 1311 | * Start out aggressively and allow our |
1da177e4 LT |
1312 | * dynamic queue depth algorithm to take |
1313 | * care of the rest. | |
1314 | */ | |
1315 | dev->maxtags = usertags; | |
1316 | dev->openings = dev->maxtags - dev->active; | |
1317 | } | |
1318 | if (dev->maxtags == 0) { | |
1319 | /* | |
1320 | * Queueing is disabled by the user. | |
1321 | */ | |
1322 | dev->openings = 1; | |
1323 | } else if (alg == AHC_QUEUE_TAGGED) { | |
1324 | dev->flags |= AHC_DEV_Q_TAGGED; | |
1325 | if (aic7xxx_periodic_otag != 0) | |
1326 | dev->flags |= AHC_DEV_PERIODIC_OTAG; | |
1327 | } else | |
1328 | dev->flags |= AHC_DEV_Q_BASIC; | |
1329 | } else { | |
1330 | /* We can only have one opening. */ | |
1331 | dev->maxtags = 0; | |
1332 | dev->openings = 1 - dev->active; | |
1333 | } | |
b1abb4d6 JB |
1334 | switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { |
1335 | case AHC_DEV_Q_BASIC: | |
b1abb4d6 | 1336 | case AHC_DEV_Q_TAGGED: |
db5ed4df | 1337 | scsi_change_queue_depth(sdev, |
2ecb204d | 1338 | dev->openings + dev->active); |
5a51a7ab | 1339 | break; |
b1abb4d6 JB |
1340 | default: |
1341 | /* | |
1342 | * We allow the OS to queue 2 untagged transactions to | |
1343 | * us at any time even though we can only execute them | |
1344 | * serially on the controller/device. This should | |
1345 | * remove some latency. | |
1346 | */ | |
db5ed4df | 1347 | scsi_change_queue_depth(sdev, 2); |
b1abb4d6 | 1348 | break; |
1da177e4 | 1349 | } |
1da177e4 LT |
1350 | } |
1351 | ||
1352 | int | |
1353 | ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, | |
1354 | int lun, u_int tag, role_t role, uint32_t status) | |
1355 | { | |
e4e360c3 | 1356 | return 0; |
1da177e4 LT |
1357 | } |
1358 | ||
cb624029 | 1359 | static u_int |
1360 | ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) | |
1da177e4 | 1361 | { |
cb624029 | 1362 | static int warned_user; |
1363 | u_int tags; | |
1da177e4 | 1364 | |
cb624029 | 1365 | tags = 0; |
1366 | if ((ahc->user_discenable & devinfo->target_mask) != 0) { | |
6391a113 | 1367 | if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { |
cb624029 | 1368 | if (warned_user == 0) { |
1da177e4 | 1369 | |
48813cf9 | 1370 | printk(KERN_WARNING |
cb624029 | 1371 | "aic7xxx: WARNING: Insufficient tag_info instances\n" |
1372 | "aic7xxx: for installed controllers. Using defaults\n" | |
1373 | "aic7xxx: Please update the aic7xxx_tag_info array in\n" | |
1374 | "aic7xxx: the aic7xxx_osm..c source file.\n"); | |
1375 | warned_user++; | |
1376 | } | |
1377 | tags = AHC_MAX_QUEUE; | |
1378 | } else { | |
1379 | adapter_tag_info_t *tag_info; | |
1da177e4 | 1380 | |
cb624029 | 1381 | tag_info = &aic7xxx_tag_info[ahc->unit]; |
1382 | tags = tag_info->tag_commands[devinfo->target_offset]; | |
1383 | if (tags > AHC_MAX_QUEUE) | |
1384 | tags = AHC_MAX_QUEUE; | |
1385 | } | |
1da177e4 | 1386 | } |
cb624029 | 1387 | return (tags); |
1da177e4 LT |
1388 | } |
1389 | ||
cb624029 | 1390 | /* |
1391 | * Determines the queue depth for a given device. | |
1392 | */ | |
1da177e4 | 1393 | static void |
b1abb4d6 | 1394 | ahc_linux_device_queue_depth(struct scsi_device *sdev) |
1da177e4 | 1395 | { |
cb624029 | 1396 | struct ahc_devinfo devinfo; |
1397 | u_int tags; | |
b1abb4d6 | 1398 | struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); |
1da177e4 | 1399 | |
cb624029 | 1400 | ahc_compile_devinfo(&devinfo, |
b1abb4d6 | 1401 | sdev->sdev_target->channel == 0 |
cb624029 | 1402 | ? ahc->our_id : ahc->our_id_b, |
b1abb4d6 JB |
1403 | sdev->sdev_target->id, sdev->lun, |
1404 | sdev->sdev_target->channel == 0 ? 'A' : 'B', | |
cb624029 | 1405 | ROLE_INITIATOR); |
1406 | tags = ahc_linux_user_tagdepth(ahc, &devinfo); | |
b1abb4d6 | 1407 | if (tags != 0 && sdev->tagged_supported != 0) { |
1da177e4 | 1408 | |
9080063f HR |
1409 | ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); |
1410 | ahc_send_async(ahc, devinfo.channel, devinfo.target, | |
1411 | devinfo.lun, AC_TRANSFER_NEG); | |
cb624029 | 1412 | ahc_print_devinfo(ahc, &devinfo); |
48813cf9 | 1413 | printk("Tagged Queuing enabled. Depth %d\n", tags); |
1da177e4 | 1414 | } else { |
9080063f HR |
1415 | ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); |
1416 | ahc_send_async(ahc, devinfo.channel, devinfo.target, | |
1417 | devinfo.lun, AC_TRANSFER_NEG); | |
1da177e4 LT |
1418 | } |
1419 | } | |
1420 | ||
e4e360c3 JB |
1421 | static int |
1422 | ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, | |
1423 | struct scsi_cmnd *cmd) | |
1da177e4 | 1424 | { |
cb624029 | 1425 | struct scb *scb; |
1426 | struct hardware_scb *hscb; | |
1427 | struct ahc_initiator_tinfo *tinfo; | |
1428 | struct ahc_tmode_tstate *tstate; | |
1429 | uint16_t mask; | |
e4e360c3 | 1430 | struct scb_tailq *untagged_q = NULL; |
3a57c4a5 | 1431 | int nseg; |
1da177e4 | 1432 | |
e4e360c3 JB |
1433 | /* |
1434 | * Schedule us to run later. The only reason we are not | |
1435 | * running is because the whole controller Q is frozen. | |
1436 | */ | |
1437 | if (ahc->platform_data->qfrozen != 0) | |
1438 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 1439 | |
e4e360c3 JB |
1440 | /* |
1441 | * We only allow one untagged transaction | |
1442 | * per target in the initiator role unless | |
1443 | * we are storing a full busy target *lun* | |
1444 | * table in SCB space. | |
1445 | */ | |
125c99bc | 1446 | if (!(cmd->flags & SCMD_TAGGED) |
e4e360c3 JB |
1447 | && (ahc->features & AHC_SCB_BTT) == 0) { |
1448 | int target_offset; | |
1da177e4 | 1449 | |
e4e360c3 JB |
1450 | target_offset = cmd->device->id + cmd->device->channel * 8; |
1451 | untagged_q = &(ahc->untagged_queues[target_offset]); | |
1452 | if (!TAILQ_EMPTY(untagged_q)) | |
1453 | /* if we're already executing an untagged command | |
1454 | * we're busy to another */ | |
1455 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1456 | } | |
1457 | ||
647b2425 FT |
1458 | nseg = scsi_dma_map(cmd); |
1459 | if (nseg < 0) | |
1460 | return SCSI_MLQUEUE_HOST_BUSY; | |
1461 | ||
e4e360c3 JB |
1462 | /* |
1463 | * Get an scb to use. | |
1464 | */ | |
8eb37942 | 1465 | scb = ahc_get_scb(ahc); |
647b2425 FT |
1466 | if (!scb) { |
1467 | scsi_dma_unmap(cmd); | |
8eb37942 | 1468 | return SCSI_MLQUEUE_HOST_BUSY; |
647b2425 | 1469 | } |
1da177e4 | 1470 | |
e4e360c3 JB |
1471 | scb->io_ctx = cmd; |
1472 | scb->platform_data->dev = dev; | |
1473 | hscb = scb->hscb; | |
1474 | cmd->host_scribble = (char *)scb; | |
1da177e4 | 1475 | |
e4e360c3 JB |
1476 | /* |
1477 | * Fill out basics of the HSCB. | |
1478 | */ | |
1479 | hscb->control = 0; | |
1480 | hscb->scsiid = BUILD_SCSIID(ahc, cmd); | |
1481 | hscb->lun = cmd->device->lun; | |
1482 | mask = SCB_GET_TARGET_MASK(ahc, scb); | |
1483 | tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), | |
1484 | SCB_GET_OUR_ID(scb), | |
1485 | SCB_GET_TARGET(ahc, scb), &tstate); | |
1486 | hscb->scsirate = tinfo->scsirate; | |
1487 | hscb->scsioffset = tinfo->curr.offset; | |
1488 | if ((tstate->ultraenb & mask) != 0) | |
1489 | hscb->control |= ULTRAENB; | |
1490 | ||
1491 | if ((ahc->user_discenable & mask) != 0) | |
1492 | hscb->control |= DISCENB; | |
1493 | ||
1494 | if ((tstate->auto_negotiate & mask) != 0) { | |
1495 | scb->flags |= SCB_AUTO_NEGOTIATE; | |
1496 | scb->hscb->control |= MK_MESSAGE; | |
1497 | } | |
1498 | ||
1499 | if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { | |
50668633 | 1500 | if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH |
dedd8310 | 1501 | && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { |
e4e360c3 JB |
1502 | hscb->control |= MSG_ORDERED_TASK; |
1503 | dev->commands_since_idle_or_otag = 0; | |
cb624029 | 1504 | } else { |
e4e360c3 | 1505 | hscb->control |= MSG_SIMPLE_TASK; |
cb624029 | 1506 | } |
e4e360c3 | 1507 | } |
1da177e4 | 1508 | |
e4e360c3 JB |
1509 | hscb->cdb_len = cmd->cmd_len; |
1510 | if (hscb->cdb_len <= 12) { | |
1511 | memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); | |
1512 | } else { | |
1513 | memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); | |
1514 | scb->flags |= SCB_CDB32_PTR; | |
1515 | } | |
1da177e4 | 1516 | |
e4e360c3 JB |
1517 | scb->platform_data->xfer_len = 0; |
1518 | ahc_set_residual(scb, 0); | |
1519 | ahc_set_sense_residual(scb, 0); | |
1520 | scb->sg_count = 0; | |
3a57c4a5 | 1521 | |
3a57c4a5 | 1522 | if (nseg > 0) { |
e4e360c3 JB |
1523 | struct ahc_dma_seg *sg; |
1524 | struct scatterlist *cur_seg; | |
3a57c4a5 | 1525 | int i; |
e4e360c3 | 1526 | |
e4e360c3 JB |
1527 | /* Copy the segments into the SG list. */ |
1528 | sg = scb->sg_list; | |
1529 | /* | |
1530 | * The sg_count may be larger than nseg if | |
1531 | * a transfer crosses a 32bit page. | |
3a57c4a5 FT |
1532 | */ |
1533 | scsi_for_each_sg(cmd, cur_seg, nseg, i) { | |
1da177e4 | 1534 | dma_addr_t addr; |
e4e360c3 JB |
1535 | bus_size_t len; |
1536 | int consumed; | |
1537 | ||
1538 | addr = sg_dma_address(cur_seg); | |
1539 | len = sg_dma_len(cur_seg); | |
1540 | consumed = ahc_linux_map_seg(ahc, scb, | |
1541 | sg, addr, len); | |
1542 | sg += consumed; | |
1543 | scb->sg_count += consumed; | |
1da177e4 | 1544 | } |
e4e360c3 JB |
1545 | sg--; |
1546 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); | |
1da177e4 | 1547 | |
e4e360c3 JB |
1548 | /* |
1549 | * Reset the sg list pointer. | |
1550 | */ | |
1551 | scb->hscb->sgptr = | |
1552 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); | |
1553 | ||
1554 | /* | |
1555 | * Copy the first SG into the "current" | |
1556 | * data pointer area. | |
1557 | */ | |
1558 | scb->hscb->dataptr = scb->sg_list->addr; | |
1559 | scb->hscb->datacnt = scb->sg_list->len; | |
e4e360c3 JB |
1560 | } else { |
1561 | scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); | |
1562 | scb->hscb->dataptr = 0; | |
1563 | scb->hscb->datacnt = 0; | |
1564 | scb->sg_count = 0; | |
1565 | } | |
1566 | ||
1567 | LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); | |
1568 | dev->openings--; | |
1569 | dev->active++; | |
1570 | dev->commands_issued++; | |
1571 | if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) | |
1572 | dev->commands_since_idle_or_otag++; | |
1573 | ||
1574 | scb->flags |= SCB_ACTIVE; | |
1575 | if (untagged_q) { | |
1576 | TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); | |
1577 | scb->flags |= SCB_UNTAGGEDQ; | |
1da177e4 | 1578 | } |
e4e360c3 JB |
1579 | ahc_queue_scb(ahc, scb); |
1580 | return 0; | |
1da177e4 LT |
1581 | } |
1582 | ||
1583 | /* | |
1584 | * SCSI controller interrupt handler. | |
1585 | */ | |
1586 | irqreturn_t | |
7d12e780 | 1587 | ahc_linux_isr(int irq, void *dev_id) |
1da177e4 LT |
1588 | { |
1589 | struct ahc_softc *ahc; | |
1590 | u_long flags; | |
1591 | int ours; | |
1592 | ||
1593 | ahc = (struct ahc_softc *) dev_id; | |
1594 | ahc_lock(ahc, &flags); | |
1595 | ours = ahc_intr(ahc); | |
1da177e4 LT |
1596 | ahc_unlock(ahc, &flags); |
1597 | return IRQ_RETVAL(ours); | |
1598 | } | |
1599 | ||
1600 | void | |
1601 | ahc_platform_flushwork(struct ahc_softc *ahc) | |
1602 | { | |
1603 | ||
1da177e4 LT |
1604 | } |
1605 | ||
1da177e4 LT |
1606 | void |
1607 | ahc_send_async(struct ahc_softc *ahc, char channel, | |
9080063f | 1608 | u_int target, u_int lun, ac_code code) |
1da177e4 LT |
1609 | { |
1610 | switch (code) { | |
1611 | case AC_TRANSFER_NEG: | |
1612 | { | |
b1abb4d6 | 1613 | struct scsi_target *starget; |
1da177e4 | 1614 | struct ahc_linux_target *targ; |
1da177e4 LT |
1615 | struct ahc_initiator_tinfo *tinfo; |
1616 | struct ahc_tmode_tstate *tstate; | |
1617 | int target_offset; | |
b1abb4d6 JB |
1618 | unsigned int target_ppr_options; |
1619 | ||
1620 | BUG_ON(target == CAM_TARGET_WILDCARD); | |
1da177e4 | 1621 | |
1da177e4 LT |
1622 | tinfo = ahc_fetch_transinfo(ahc, channel, |
1623 | channel == 'A' ? ahc->our_id | |
1624 | : ahc->our_id_b, | |
1625 | target, &tstate); | |
1626 | ||
1627 | /* | |
1628 | * Don't bother reporting results while | |
1629 | * negotiations are still pending. | |
1630 | */ | |
1631 | if (tinfo->curr.period != tinfo->goal.period | |
1632 | || tinfo->curr.width != tinfo->goal.width | |
1633 | || tinfo->curr.offset != tinfo->goal.offset | |
1634 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options) | |
1635 | if (bootverbose == 0) | |
1636 | break; | |
1637 | ||
1638 | /* | |
1639 | * Don't bother reporting results that | |
1640 | * are identical to those last reported. | |
1641 | */ | |
1642 | target_offset = target; | |
1643 | if (channel == 'B') | |
1644 | target_offset += 8; | |
b1abb4d6 | 1645 | starget = ahc->platform_data->starget[target_offset]; |
fc789a93 | 1646 | if (starget == NULL) |
1da177e4 | 1647 | break; |
fc789a93 | 1648 | targ = scsi_transport_target_data(starget); |
b1abb4d6 JB |
1649 | |
1650 | target_ppr_options = | |
1651 | (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) | |
1652 | + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) | |
1653 | + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); | |
1654 | ||
1655 | if (tinfo->curr.period == spi_period(starget) | |
1656 | && tinfo->curr.width == spi_width(starget) | |
1657 | && tinfo->curr.offset == spi_offset(starget) | |
1658 | && tinfo->curr.ppr_options == target_ppr_options) | |
1da177e4 LT |
1659 | if (bootverbose == 0) |
1660 | break; | |
1661 | ||
b1abb4d6 JB |
1662 | spi_period(starget) = tinfo->curr.period; |
1663 | spi_width(starget) = tinfo->curr.width; | |
1664 | spi_offset(starget) = tinfo->curr.offset; | |
f7ff898a JB |
1665 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; |
1666 | spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; | |
1667 | spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; | |
b1abb4d6 | 1668 | spi_display_xfer_agreement(starget); |
1da177e4 LT |
1669 | break; |
1670 | } | |
1671 | case AC_SENT_BDR: | |
1672 | { | |
1da177e4 LT |
1673 | WARN_ON(lun != CAM_LUN_WILDCARD); |
1674 | scsi_report_device_reset(ahc->platform_data->host, | |
1675 | channel - 'A', target); | |
1da177e4 LT |
1676 | break; |
1677 | } | |
1678 | case AC_BUS_RESET: | |
1679 | if (ahc->platform_data->host != NULL) { | |
1680 | scsi_report_bus_reset(ahc->platform_data->host, | |
1681 | channel - 'A'); | |
1682 | } | |
1683 | break; | |
1684 | default: | |
1685 | panic("ahc_send_async: Unexpected async event"); | |
1686 | } | |
1687 | } | |
1688 | ||
1689 | /* | |
1690 | * Calls the higher level scsi done function and frees the scb. | |
1691 | */ | |
1692 | void | |
1693 | ahc_done(struct ahc_softc *ahc, struct scb *scb) | |
1694 | { | |
013791ee | 1695 | struct scsi_cmnd *cmd; |
1da177e4 LT |
1696 | struct ahc_linux_device *dev; |
1697 | ||
1698 | LIST_REMOVE(scb, pending_links); | |
1699 | if ((scb->flags & SCB_UNTAGGEDQ) != 0) { | |
1700 | struct scb_tailq *untagged_q; | |
1701 | int target_offset; | |
1702 | ||
1703 | target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); | |
1704 | untagged_q = &(ahc->untagged_queues[target_offset]); | |
1705 | TAILQ_REMOVE(untagged_q, scb, links.tqe); | |
e4e360c3 | 1706 | BUG_ON(!TAILQ_EMPTY(untagged_q)); |
969ceffb DM |
1707 | } else if ((scb->flags & SCB_ACTIVE) == 0) { |
1708 | /* | |
1709 | * Transactions aborted from the untagged queue may | |
1710 | * not have been dispatched to the controller, so | |
1711 | * only check the SCB_ACTIVE flag for tagged transactions. | |
1712 | */ | |
48813cf9 | 1713 | printk("SCB %d done'd twice\n", scb->hscb->tag); |
1da177e4 LT |
1714 | ahc_dump_card_state(ahc); |
1715 | panic("Stopping for safety"); | |
1716 | } | |
1717 | cmd = scb->io_ctx; | |
1718 | dev = scb->platform_data->dev; | |
1719 | dev->active--; | |
1720 | dev->openings++; | |
1721 | if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { | |
1722 | cmd->result &= ~(CAM_DEV_QFRZN << 16); | |
1723 | dev->qfrozen--; | |
1724 | } | |
1725 | ahc_linux_unmap_scb(ahc, scb); | |
1726 | ||
1727 | /* | |
1728 | * Guard against stale sense data. | |
1729 | * The Linux mid-layer assumes that sense | |
1730 | * was retrieved anytime the first byte of | |
1731 | * the sense buffer looks "sane". | |
1732 | */ | |
1733 | cmd->sense_buffer[0] = 0; | |
1734 | if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { | |
1735 | uint32_t amount_xferred; | |
1736 | ||
1737 | amount_xferred = | |
1738 | ahc_get_transfer_length(scb) - ahc_get_residual(scb); | |
1739 | if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { | |
1740 | #ifdef AHC_DEBUG | |
1741 | if ((ahc_debug & AHC_SHOW_MISC) != 0) { | |
1742 | ahc_print_path(ahc, scb); | |
48813cf9 | 1743 | printk("Set CAM_UNCOR_PARITY\n"); |
1da177e4 LT |
1744 | } |
1745 | #endif | |
1746 | ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); | |
1747 | #ifdef AHC_REPORT_UNDERFLOWS | |
1748 | /* | |
1749 | * This code is disabled by default as some | |
1750 | * clients of the SCSI system do not properly | |
1751 | * initialize the underflow parameter. This | |
1752 | * results in spurious termination of commands | |
1753 | * that complete as expected (e.g. underflow is | |
1754 | * allowed as command can return variable amounts | |
1755 | * of data. | |
1756 | */ | |
1757 | } else if (amount_xferred < scb->io_ctx->underflow) { | |
1758 | u_int i; | |
1759 | ||
1760 | ahc_print_path(ahc, scb); | |
48813cf9 | 1761 | printk("CDB:"); |
1da177e4 | 1762 | for (i = 0; i < scb->io_ctx->cmd_len; i++) |
48813cf9 PE |
1763 | printk(" 0x%x", scb->io_ctx->cmnd[i]); |
1764 | printk("\n"); | |
1da177e4 | 1765 | ahc_print_path(ahc, scb); |
48813cf9 | 1766 | printk("Saw underflow (%ld of %ld bytes). " |
1da177e4 LT |
1767 | "Treated as error\n", |
1768 | ahc_get_residual(scb), | |
1769 | ahc_get_transfer_length(scb)); | |
1770 | ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); | |
1771 | #endif | |
1772 | } else { | |
1773 | ahc_set_transaction_status(scb, CAM_REQ_CMP); | |
1774 | } | |
1775 | } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { | |
b1abb4d6 | 1776 | ahc_linux_handle_scsi_status(ahc, cmd->device, scb); |
1da177e4 | 1777 | } |
1da177e4 LT |
1778 | |
1779 | if (dev->openings == 1 | |
1780 | && ahc_get_transaction_status(scb) == CAM_REQ_CMP | |
1781 | && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) | |
1782 | dev->tag_success_count++; | |
1783 | /* | |
1784 | * Some devices deal with temporary internal resource | |
1785 | * shortages by returning queue full. When the queue | |
1786 | * full occurrs, we throttle back. Slowly try to get | |
1787 | * back to our previous queue depth. | |
1788 | */ | |
1789 | if ((dev->openings + dev->active) < dev->maxtags | |
1790 | && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { | |
1791 | dev->tag_success_count = 0; | |
1792 | dev->openings++; | |
1793 | } | |
1794 | ||
1795 | if (dev->active == 0) | |
1796 | dev->commands_since_idle_or_otag = 0; | |
1797 | ||
1da177e4 | 1798 | if ((scb->flags & SCB_RECOVERY_SCB) != 0) { |
48813cf9 | 1799 | printk("Recovery SCB completes\n"); |
1da177e4 LT |
1800 | if (ahc_get_transaction_status(scb) == CAM_BDR_SENT |
1801 | || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) | |
1802 | ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); | |
8cac8145 CH |
1803 | |
1804 | if (ahc->platform_data->eh_done) | |
1805 | complete(ahc->platform_data->eh_done); | |
1da177e4 LT |
1806 | } |
1807 | ||
1808 | ahc_free_scb(ahc, scb); | |
1809 | ahc_linux_queue_cmd_complete(ahc, cmd); | |
1da177e4 LT |
1810 | } |
1811 | ||
1812 | static void | |
1813 | ahc_linux_handle_scsi_status(struct ahc_softc *ahc, | |
b1abb4d6 | 1814 | struct scsi_device *sdev, struct scb *scb) |
1da177e4 LT |
1815 | { |
1816 | struct ahc_devinfo devinfo; | |
b1abb4d6 | 1817 | struct ahc_linux_device *dev = scsi_transport_device_data(sdev); |
1da177e4 LT |
1818 | |
1819 | ahc_compile_devinfo(&devinfo, | |
1820 | ahc->our_id, | |
b1abb4d6 JB |
1821 | sdev->sdev_target->id, sdev->lun, |
1822 | sdev->sdev_target->channel == 0 ? 'A' : 'B', | |
1da177e4 LT |
1823 | ROLE_INITIATOR); |
1824 | ||
1825 | /* | |
1826 | * We don't currently trust the mid-layer to | |
1827 | * properly deal with queue full or busy. So, | |
1828 | * when one occurs, we tell the mid-layer to | |
1829 | * unconditionally requeue the command to us | |
1830 | * so that we can retry it ourselves. We also | |
1831 | * implement our own throttling mechanism so | |
1832 | * we don't clobber the device with too many | |
1833 | * commands. | |
1834 | */ | |
1835 | switch (ahc_get_scsi_status(scb)) { | |
1836 | default: | |
1837 | break; | |
1838 | case SCSI_STATUS_CHECK_COND: | |
1839 | case SCSI_STATUS_CMD_TERMINATED: | |
1840 | { | |
013791ee | 1841 | struct scsi_cmnd *cmd; |
1da177e4 LT |
1842 | |
1843 | /* | |
1844 | * Copy sense information to the OS's cmd | |
1845 | * structure if it is available. | |
1846 | */ | |
1847 | cmd = scb->io_ctx; | |
1848 | if (scb->flags & SCB_SENSE) { | |
1849 | u_int sense_size; | |
1850 | ||
6d07cb71 | 1851 | sense_size = min(sizeof(struct scsi_sense_data) |
1da177e4 | 1852 | - ahc_get_sense_residual(scb), |
b80ca4f7 | 1853 | (u_long)SCSI_SENSE_BUFFERSIZE); |
1da177e4 LT |
1854 | memcpy(cmd->sense_buffer, |
1855 | ahc_get_sense_buf(ahc, scb), sense_size); | |
b80ca4f7 | 1856 | if (sense_size < SCSI_SENSE_BUFFERSIZE) |
1da177e4 | 1857 | memset(&cmd->sense_buffer[sense_size], 0, |
b80ca4f7 | 1858 | SCSI_SENSE_BUFFERSIZE - sense_size); |
1da177e4 LT |
1859 | cmd->result |= (DRIVER_SENSE << 24); |
1860 | #ifdef AHC_DEBUG | |
1861 | if (ahc_debug & AHC_SHOW_SENSE) { | |
1862 | int i; | |
1863 | ||
48813cf9 | 1864 | printk("Copied %d bytes of sense data:", |
1da177e4 LT |
1865 | sense_size); |
1866 | for (i = 0; i < sense_size; i++) { | |
1867 | if ((i & 0xF) == 0) | |
48813cf9 PE |
1868 | printk("\n"); |
1869 | printk("0x%x ", cmd->sense_buffer[i]); | |
1da177e4 | 1870 | } |
48813cf9 | 1871 | printk("\n"); |
1da177e4 LT |
1872 | } |
1873 | #endif | |
1874 | } | |
1875 | break; | |
1876 | } | |
1877 | case SCSI_STATUS_QUEUE_FULL: | |
1878 | { | |
1879 | /* | |
1880 | * By the time the core driver has returned this | |
1881 | * command, all other commands that were queued | |
1882 | * to us but not the device have been returned. | |
1883 | * This ensures that dev->active is equal to | |
1884 | * the number of commands actually queued to | |
1885 | * the device. | |
1886 | */ | |
1887 | dev->tag_success_count = 0; | |
1888 | if (dev->active != 0) { | |
1889 | /* | |
1890 | * Drop our opening count to the number | |
1891 | * of commands currently outstanding. | |
1892 | */ | |
1893 | dev->openings = 0; | |
1894 | /* | |
1895 | ahc_print_path(ahc, scb); | |
48813cf9 | 1896 | printk("Dropping tag count to %d\n", dev->active); |
1da177e4 LT |
1897 | */ |
1898 | if (dev->active == dev->tags_on_last_queuefull) { | |
1899 | ||
1900 | dev->last_queuefull_same_count++; | |
1901 | /* | |
1902 | * If we repeatedly see a queue full | |
1903 | * at the same queue depth, this | |
1904 | * device has a fixed number of tag | |
1905 | * slots. Lock in this tag depth | |
1906 | * so we stop seeing queue fulls from | |
1907 | * this device. | |
1908 | */ | |
1909 | if (dev->last_queuefull_same_count | |
1910 | == AHC_LOCK_TAGS_COUNT) { | |
1911 | dev->maxtags = dev->active; | |
1912 | ahc_print_path(ahc, scb); | |
48813cf9 | 1913 | printk("Locking max tag count at %d\n", |
1da177e4 LT |
1914 | dev->active); |
1915 | } | |
1916 | } else { | |
1917 | dev->tags_on_last_queuefull = dev->active; | |
1918 | dev->last_queuefull_same_count = 0; | |
1919 | } | |
1920 | ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); | |
1921 | ahc_set_scsi_status(scb, SCSI_STATUS_OK); | |
9080063f | 1922 | ahc_platform_set_tags(ahc, sdev, &devinfo, |
1da177e4 LT |
1923 | (dev->flags & AHC_DEV_Q_BASIC) |
1924 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | |
1925 | break; | |
1926 | } | |
1927 | /* | |
1928 | * Drop down to a single opening, and treat this | |
1929 | * as if the target returned BUSY SCSI status. | |
1930 | */ | |
1931 | dev->openings = 1; | |
1932 | ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); | |
9080063f | 1933 | ahc_platform_set_tags(ahc, sdev, &devinfo, |
1da177e4 LT |
1934 | (dev->flags & AHC_DEV_Q_BASIC) |
1935 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | |
1da177e4 LT |
1936 | break; |
1937 | } | |
1938 | } | |
1939 | } | |
1940 | ||
1941 | static void | |
013791ee | 1942 | ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) |
1da177e4 | 1943 | { |
1da177e4 LT |
1944 | /* |
1945 | * Map CAM error codes into Linux Error codes. We | |
1946 | * avoid the conversion so that the DV code has the | |
1947 | * full error information available when making | |
1948 | * state change decisions. | |
1949 | */ | |
cb624029 | 1950 | { |
1da177e4 LT |
1951 | u_int new_status; |
1952 | ||
1953 | switch (ahc_cmd_get_transaction_status(cmd)) { | |
1954 | case CAM_REQ_INPROG: | |
1955 | case CAM_REQ_CMP: | |
1956 | case CAM_SCSI_STATUS_ERROR: | |
1957 | new_status = DID_OK; | |
1958 | break; | |
1959 | case CAM_REQ_ABORTED: | |
1960 | new_status = DID_ABORT; | |
1961 | break; | |
1962 | case CAM_BUSY: | |
1963 | new_status = DID_BUS_BUSY; | |
1964 | break; | |
1965 | case CAM_REQ_INVALID: | |
1966 | case CAM_PATH_INVALID: | |
1967 | new_status = DID_BAD_TARGET; | |
1968 | break; | |
1969 | case CAM_SEL_TIMEOUT: | |
1970 | new_status = DID_NO_CONNECT; | |
1971 | break; | |
1972 | case CAM_SCSI_BUS_RESET: | |
1973 | case CAM_BDR_SENT: | |
1974 | new_status = DID_RESET; | |
1975 | break; | |
1976 | case CAM_UNCOR_PARITY: | |
1977 | new_status = DID_PARITY; | |
1978 | break; | |
1979 | case CAM_CMD_TIMEOUT: | |
1980 | new_status = DID_TIME_OUT; | |
1981 | break; | |
1982 | case CAM_UA_ABORT: | |
1983 | case CAM_REQ_CMP_ERR: | |
1984 | case CAM_AUTOSENSE_FAIL: | |
1985 | case CAM_NO_HBA: | |
1986 | case CAM_DATA_RUN_ERR: | |
1987 | case CAM_UNEXP_BUSFREE: | |
1988 | case CAM_SEQUENCE_FAIL: | |
1989 | case CAM_CCB_LEN_ERR: | |
1990 | case CAM_PROVIDE_FAIL: | |
1991 | case CAM_REQ_TERMIO: | |
1992 | case CAM_UNREC_HBA_ERROR: | |
1993 | case CAM_REQ_TOO_BIG: | |
1994 | new_status = DID_ERROR; | |
1995 | break; | |
1996 | case CAM_REQUEUE_REQ: | |
8e45ebcc | 1997 | new_status = DID_REQUEUE; |
1da177e4 LT |
1998 | break; |
1999 | default: | |
2000 | /* We should never get here */ | |
2001 | new_status = DID_ERROR; | |
2002 | break; | |
2003 | } | |
2004 | ||
2005 | ahc_cmd_set_transaction_status(cmd, new_status); | |
2006 | } | |
2007 | ||
8e45ebcc | 2008 | cmd->scsi_done(cmd); |
1da177e4 LT |
2009 | } |
2010 | ||
1da177e4 LT |
2011 | static void |
2012 | ahc_linux_freeze_simq(struct ahc_softc *ahc) | |
2013 | { | |
dacee84b JB |
2014 | unsigned long s; |
2015 | ||
2016 | ahc_lock(ahc, &s); | |
1da177e4 LT |
2017 | ahc->platform_data->qfrozen++; |
2018 | if (ahc->platform_data->qfrozen == 1) { | |
2019 | scsi_block_requests(ahc->platform_data->host); | |
2020 | ||
2021 | /* XXX What about Twin channels? */ | |
2022 | ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, | |
2023 | CAM_LUN_WILDCARD, SCB_LIST_NULL, | |
2024 | ROLE_INITIATOR, CAM_REQUEUE_REQ); | |
2025 | } | |
dacee84b | 2026 | ahc_unlock(ahc, &s); |
1da177e4 LT |
2027 | } |
2028 | ||
2029 | static void | |
dacee84b | 2030 | ahc_linux_release_simq(struct ahc_softc *ahc) |
1da177e4 | 2031 | { |
1da177e4 LT |
2032 | u_long s; |
2033 | int unblock_reqs; | |
2034 | ||
1da177e4 LT |
2035 | unblock_reqs = 0; |
2036 | ahc_lock(ahc, &s); | |
2037 | if (ahc->platform_data->qfrozen > 0) | |
2038 | ahc->platform_data->qfrozen--; | |
2039 | if (ahc->platform_data->qfrozen == 0) | |
2040 | unblock_reqs = 1; | |
1da177e4 LT |
2041 | ahc_unlock(ahc, &s); |
2042 | /* | |
2043 | * There is still a race here. The mid-layer | |
2044 | * should keep its own freeze count and use | |
2045 | * a bottom half handler to run the queues | |
2046 | * so we can unblock with our own lock held. | |
2047 | */ | |
2048 | if (unblock_reqs) | |
2049 | scsi_unblock_requests(ahc->platform_data->host); | |
2050 | } | |
2051 | ||
1da177e4 | 2052 | static int |
013791ee | 2053 | ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) |
1da177e4 LT |
2054 | { |
2055 | struct ahc_softc *ahc; | |
1da177e4 LT |
2056 | struct ahc_linux_device *dev; |
2057 | struct scb *pending_scb; | |
1da177e4 LT |
2058 | u_int saved_scbptr; |
2059 | u_int active_scb_index; | |
2060 | u_int last_phase; | |
2061 | u_int saved_scsiid; | |
2062 | u_int cdb_byte; | |
2063 | int retval; | |
2064 | int was_paused; | |
2065 | int paused; | |
2066 | int wait; | |
2067 | int disconnected; | |
6d5e9fd1 | 2068 | unsigned long flags; |
1da177e4 LT |
2069 | |
2070 | pending_scb = NULL; | |
2071 | paused = FALSE; | |
2072 | wait = FALSE; | |
2073 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
1da177e4 | 2074 | |
017560fc | 2075 | scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", |
1da177e4 LT |
2076 | flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); |
2077 | ||
48813cf9 | 2078 | printk("CDB:"); |
1da177e4 | 2079 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) |
48813cf9 PE |
2080 | printk(" 0x%x", cmd->cmnd[cdb_byte]); |
2081 | printk("\n"); | |
1da177e4 | 2082 | |
6d5e9fd1 | 2083 | ahc_lock(ahc, &flags); |
8fa728a2 | 2084 | |
1da177e4 LT |
2085 | /* |
2086 | * First determine if we currently own this command. | |
2087 | * Start by searching the device queue. If not found | |
2088 | * there, check the pending_scb list. If not found | |
2089 | * at all, and the system wanted us to just abort the | |
2090 | * command, return success. | |
2091 | */ | |
b1abb4d6 | 2092 | dev = scsi_transport_device_data(cmd->device); |
1da177e4 LT |
2093 | |
2094 | if (dev == NULL) { | |
2095 | /* | |
2096 | * No target device for this command exists, | |
2097 | * so we must not still own the command. | |
2098 | */ | |
48813cf9 | 2099 | printk("%s:%d:%d:%d: Is not an active device\n", |
1da177e4 | 2100 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
9cb78c16 | 2101 | (u8)cmd->device->lun); |
1da177e4 LT |
2102 | retval = SUCCESS; |
2103 | goto no_cmd; | |
2104 | } | |
2105 | ||
1da177e4 LT |
2106 | if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 |
2107 | && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, | |
2108 | cmd->device->channel + 'A', | |
9cb78c16 | 2109 | (u8)cmd->device->lun, |
1da177e4 | 2110 | CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { |
48813cf9 | 2111 | printk("%s:%d:%d:%d: Command found on untagged queue\n", |
1da177e4 | 2112 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
9cb78c16 | 2113 | (u8)cmd->device->lun); |
1da177e4 LT |
2114 | retval = SUCCESS; |
2115 | goto done; | |
2116 | } | |
2117 | ||
2118 | /* | |
2119 | * See if we can find a matching cmd in the pending list. | |
2120 | */ | |
2121 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | |
2122 | if (pending_scb->io_ctx == cmd) | |
2123 | break; | |
2124 | } | |
2125 | ||
2126 | if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { | |
2127 | ||
2128 | /* Any SCB for this device will do for a target reset */ | |
2129 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | |
422c0d61 JG |
2130 | if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), |
2131 | scmd_channel(cmd) + 'A', | |
1da177e4 | 2132 | CAM_LUN_WILDCARD, |
dce20067 | 2133 | SCB_LIST_NULL, ROLE_INITIATOR)) |
1da177e4 LT |
2134 | break; |
2135 | } | |
2136 | } | |
2137 | ||
2138 | if (pending_scb == NULL) { | |
017560fc | 2139 | scmd_printk(KERN_INFO, cmd, "Command not found\n"); |
1da177e4 LT |
2140 | goto no_cmd; |
2141 | } | |
2142 | ||
2143 | if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { | |
2144 | /* | |
2145 | * We can't queue two recovery actions using the same SCB | |
2146 | */ | |
2147 | retval = FAILED; | |
2148 | goto done; | |
2149 | } | |
2150 | ||
2151 | /* | |
2152 | * Ensure that the card doesn't do anything | |
2153 | * behind our back and that we didn't "just" miss | |
2154 | * an interrupt that would affect this cmd. | |
2155 | */ | |
2156 | was_paused = ahc_is_paused(ahc); | |
2157 | ahc_pause_and_flushwork(ahc); | |
2158 | paused = TRUE; | |
2159 | ||
2160 | if ((pending_scb->flags & SCB_ACTIVE) == 0) { | |
017560fc | 2161 | scmd_printk(KERN_INFO, cmd, "Command already completed\n"); |
1da177e4 LT |
2162 | goto no_cmd; |
2163 | } | |
2164 | ||
48813cf9 | 2165 | printk("%s: At time of recovery, card was %spaused\n", |
1da177e4 LT |
2166 | ahc_name(ahc), was_paused ? "" : "not "); |
2167 | ahc_dump_card_state(ahc); | |
2168 | ||
2169 | disconnected = TRUE; | |
2170 | if (flag == SCB_ABORT) { | |
2171 | if (ahc_search_qinfifo(ahc, cmd->device->id, | |
2172 | cmd->device->channel + 'A', | |
2173 | cmd->device->lun, | |
2174 | pending_scb->hscb->tag, | |
2175 | ROLE_INITIATOR, CAM_REQ_ABORTED, | |
2176 | SEARCH_COMPLETE) > 0) { | |
48813cf9 | 2177 | printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", |
1da177e4 | 2178 | ahc_name(ahc), cmd->device->channel, |
9cb78c16 | 2179 | cmd->device->id, (u8)cmd->device->lun); |
1da177e4 LT |
2180 | retval = SUCCESS; |
2181 | goto done; | |
2182 | } | |
2183 | } else if (ahc_search_qinfifo(ahc, cmd->device->id, | |
2184 | cmd->device->channel + 'A', | |
9cb78c16 HR |
2185 | cmd->device->lun, |
2186 | pending_scb->hscb->tag, | |
1da177e4 LT |
2187 | ROLE_INITIATOR, /*status*/0, |
2188 | SEARCH_COUNT) > 0) { | |
2189 | disconnected = FALSE; | |
2190 | } | |
2191 | ||
2192 | if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { | |
2193 | struct scb *bus_scb; | |
2194 | ||
2195 | bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); | |
2196 | if (bus_scb == pending_scb) | |
2197 | disconnected = FALSE; | |
2198 | else if (flag != SCB_ABORT | |
2199 | && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid | |
2200 | && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) | |
2201 | disconnected = FALSE; | |
2202 | } | |
2203 | ||
2204 | /* | |
2205 | * At this point, pending_scb is the scb associated with the | |
2206 | * passed in command. That command is currently active on the | |
2207 | * bus, is in the disconnected state, or we're hoping to find | |
2208 | * a command for the same target active on the bus to abuse to | |
2209 | * send a BDR. Queue the appropriate message based on which of | |
2210 | * these states we are in. | |
2211 | */ | |
2212 | last_phase = ahc_inb(ahc, LASTPHASE); | |
2213 | saved_scbptr = ahc_inb(ahc, SCBPTR); | |
2214 | active_scb_index = ahc_inb(ahc, SCB_TAG); | |
2215 | saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); | |
2216 | if (last_phase != P_BUSFREE | |
2217 | && (pending_scb->hscb->tag == active_scb_index | |
2218 | || (flag == SCB_DEVICE_RESET | |
422c0d61 | 2219 | && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { |
1da177e4 LT |
2220 | |
2221 | /* | |
2222 | * We're active on the bus, so assert ATN | |
2223 | * and hope that the target responds. | |
2224 | */ | |
2225 | pending_scb = ahc_lookup_scb(ahc, active_scb_index); | |
2226 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | |
2227 | ahc_outb(ahc, MSG_OUT, HOST_MSG); | |
2228 | ahc_outb(ahc, SCSISIGO, last_phase|ATNO); | |
017560fc | 2229 | scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); |
1da177e4 LT |
2230 | wait = TRUE; |
2231 | } else if (disconnected) { | |
2232 | ||
2233 | /* | |
2234 | * Actually re-queue this SCB in an attempt | |
2235 | * to select the device before it reconnects. | |
2236 | * In either case (selection or reselection), | |
2237 | * we will now issue the approprate message | |
2238 | * to the timed-out device. | |
2239 | * | |
2240 | * Set the MK_MESSAGE control bit indicating | |
2241 | * that we desire to send a message. We | |
2242 | * also set the disconnected flag since | |
2243 | * in the paging case there is no guarantee | |
2244 | * that our SCB control byte matches the | |
2245 | * version on the card. We don't want the | |
2246 | * sequencer to abort the command thinking | |
2247 | * an unsolicited reselection occurred. | |
2248 | */ | |
2249 | pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; | |
2250 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | |
2251 | ||
2252 | /* | |
2253 | * Remove any cached copy of this SCB in the | |
2254 | * disconnected list in preparation for the | |
2255 | * queuing of our abort SCB. We use the | |
2256 | * same element in the SCB, SCB_NEXT, for | |
2257 | * both the qinfifo and the disconnected list. | |
2258 | */ | |
2259 | ahc_search_disc_list(ahc, cmd->device->id, | |
2260 | cmd->device->channel + 'A', | |
2261 | cmd->device->lun, pending_scb->hscb->tag, | |
2262 | /*stop_on_first*/TRUE, | |
2263 | /*remove*/TRUE, | |
2264 | /*save_state*/FALSE); | |
2265 | ||
2266 | /* | |
2267 | * In the non-paging case, the sequencer will | |
2268 | * never re-reference the in-core SCB. | |
2269 | * To make sure we are notified during | |
b71a8eb0 | 2270 | * reselection, set the MK_MESSAGE flag in |
1da177e4 LT |
2271 | * the card's copy of the SCB. |
2272 | */ | |
2273 | if ((ahc->flags & AHC_PAGESCBS) == 0) { | |
2274 | ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); | |
2275 | ahc_outb(ahc, SCB_CONTROL, | |
2276 | ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); | |
2277 | } | |
2278 | ||
2279 | /* | |
2280 | * Clear out any entries in the QINFIFO first | |
2281 | * so we are the next SCB for this target | |
2282 | * to run. | |
2283 | */ | |
2284 | ahc_search_qinfifo(ahc, cmd->device->id, | |
2285 | cmd->device->channel + 'A', | |
2286 | cmd->device->lun, SCB_LIST_NULL, | |
2287 | ROLE_INITIATOR, CAM_REQUEUE_REQ, | |
2288 | SEARCH_COMPLETE); | |
2289 | ahc_qinfifo_requeue_tail(ahc, pending_scb); | |
2290 | ahc_outb(ahc, SCBPTR, saved_scbptr); | |
2291 | ahc_print_path(ahc, pending_scb); | |
48813cf9 | 2292 | printk("Device is disconnected, re-queuing SCB\n"); |
1da177e4 LT |
2293 | wait = TRUE; |
2294 | } else { | |
017560fc | 2295 | scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); |
1da177e4 LT |
2296 | retval = FAILED; |
2297 | goto done; | |
2298 | } | |
2299 | ||
2300 | no_cmd: | |
2301 | /* | |
2302 | * Our assumption is that if we don't have the command, no | |
2303 | * recovery action was required, so we return success. Again, | |
2304 | * the semantics of the mid-layer recovery engine are not | |
2305 | * well defined, so this may change in time. | |
2306 | */ | |
2307 | retval = SUCCESS; | |
2308 | done: | |
2309 | if (paused) | |
2310 | ahc_unpause(ahc); | |
2311 | if (wait) { | |
6e9a4738 | 2312 | DECLARE_COMPLETION_ONSTACK(done); |
1da177e4 | 2313 | |
8cac8145 | 2314 | ahc->platform_data->eh_done = &done; |
6d5e9fd1 CH |
2315 | ahc_unlock(ahc, &flags); |
2316 | ||
48813cf9 | 2317 | printk("Recovery code sleeping\n"); |
8cac8145 CH |
2318 | if (!wait_for_completion_timeout(&done, 5 * HZ)) { |
2319 | ahc_lock(ahc, &flags); | |
2320 | ahc->platform_data->eh_done = NULL; | |
2321 | ahc_unlock(ahc, &flags); | |
2322 | ||
48813cf9 | 2323 | printk("Timer Expired\n"); |
1da177e4 LT |
2324 | retval = FAILED; |
2325 | } | |
48813cf9 | 2326 | printk("Recovery code awake\n"); |
6d5e9fd1 CH |
2327 | } else |
2328 | ahc_unlock(ahc, &flags); | |
1da177e4 LT |
2329 | return (retval); |
2330 | } | |
2331 | ||
2332 | void | |
2333 | ahc_platform_dump_card_state(struct ahc_softc *ahc) | |
2334 | { | |
1da177e4 LT |
2335 | } |
2336 | ||
fad01ef8 JB |
2337 | static void ahc_linux_set_width(struct scsi_target *starget, int width) |
2338 | { | |
2339 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2340 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2341 | struct ahc_devinfo devinfo; | |
2342 | unsigned long flags; | |
2343 | ||
2344 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2345 | starget->channel + 'A', ROLE_INITIATOR); | |
2346 | ahc_lock(ahc, &flags); | |
2347 | ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); | |
2348 | ahc_unlock(ahc, &flags); | |
2349 | } | |
2350 | ||
92d161c3 | 2351 | static void ahc_linux_set_period(struct scsi_target *starget, int period) |
2352 | { | |
2353 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2354 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2355 | struct ahc_tmode_tstate *tstate; | |
2356 | struct ahc_initiator_tinfo *tinfo | |
2357 | = ahc_fetch_transinfo(ahc, | |
2358 | starget->channel + 'A', | |
2359 | shost->this_id, starget->id, &tstate); | |
2360 | struct ahc_devinfo devinfo; | |
597487b9 | 2361 | unsigned int ppr_options = tinfo->goal.ppr_options; |
92d161c3 | 2362 | unsigned long flags; |
597487b9 | 2363 | unsigned long offset = tinfo->goal.offset; |
d1d7b19d | 2364 | const struct ahc_syncrate *syncrate; |
92d161c3 | 2365 | |
2366 | if (offset == 0) | |
2367 | offset = MAX_OFFSET; | |
2368 | ||
2bf2c568 JB |
2369 | if (period < 9) |
2370 | period = 9; /* 12.5ns is our minimum */ | |
0f82cb92 JB |
2371 | if (period == 9) { |
2372 | if (spi_max_width(starget)) | |
2373 | ppr_options |= MSG_EXT_PPR_DT_REQ; | |
2374 | else | |
2375 | /* need wide for DT and need DT for 12.5 ns */ | |
2376 | period = 10; | |
2377 | } | |
2bf2c568 | 2378 | |
92d161c3 | 2379 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
2380 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 JB |
2381 | |
2382 | /* all PPR requests apart from QAS require wide transfers */ | |
2383 | if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { | |
fad01ef8 JB |
2384 | if (spi_width(starget) == 0) |
2385 | ppr_options &= MSG_EXT_PPR_QAS_REQ; | |
2386 | } | |
2387 | ||
92d161c3 | 2388 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
2389 | ahc_lock(ahc, &flags); | |
2390 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, | |
2391 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
2392 | ahc_unlock(ahc, &flags); | |
2393 | } | |
2394 | ||
92d161c3 | 2395 | static void ahc_linux_set_offset(struct scsi_target *starget, int offset) |
2396 | { | |
2397 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2398 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2399 | struct ahc_tmode_tstate *tstate; | |
2400 | struct ahc_initiator_tinfo *tinfo | |
2401 | = ahc_fetch_transinfo(ahc, | |
2402 | starget->channel + 'A', | |
2403 | shost->this_id, starget->id, &tstate); | |
2404 | struct ahc_devinfo devinfo; | |
2405 | unsigned int ppr_options = 0; | |
2406 | unsigned int period = 0; | |
2407 | unsigned long flags; | |
d1d7b19d | 2408 | const struct ahc_syncrate *syncrate = NULL; |
92d161c3 | 2409 | |
2410 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2411 | starget->channel + 'A', ROLE_INITIATOR); | |
2412 | if (offset != 0) { | |
2413 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); | |
597487b9 JB |
2414 | period = tinfo->goal.period; |
2415 | ppr_options = tinfo->goal.ppr_options; | |
92d161c3 | 2416 | } |
2417 | ahc_lock(ahc, &flags); | |
2418 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, | |
2419 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
2420 | ahc_unlock(ahc, &flags); | |
2421 | } | |
2422 | ||
92d161c3 | 2423 | static void ahc_linux_set_dt(struct scsi_target *starget, int dt) |
2424 | { | |
2425 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2426 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2427 | struct ahc_tmode_tstate *tstate; | |
2428 | struct ahc_initiator_tinfo *tinfo | |
2429 | = ahc_fetch_transinfo(ahc, | |
2430 | starget->channel + 'A', | |
2431 | shost->this_id, starget->id, &tstate); | |
2432 | struct ahc_devinfo devinfo; | |
597487b9 | 2433 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2434 | & ~MSG_EXT_PPR_DT_REQ; |
597487b9 | 2435 | unsigned int period = tinfo->goal.period; |
84e66ee7 | 2436 | unsigned int width = tinfo->goal.width; |
92d161c3 | 2437 | unsigned long flags; |
d1d7b19d | 2438 | const struct ahc_syncrate *syncrate; |
92d161c3 | 2439 | |
0f82cb92 | 2440 | if (dt && spi_max_width(starget)) { |
2bf2c568 | 2441 | ppr_options |= MSG_EXT_PPR_DT_REQ; |
84e66ee7 JB |
2442 | if (!width) |
2443 | ahc_linux_set_width(starget, 1); | |
2444 | } else if (period == 9) | |
2bf2c568 JB |
2445 | period = 10; /* if resetting DT, period must be >= 25ns */ |
2446 | ||
92d161c3 | 2447 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
2448 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2449 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); |
92d161c3 | 2450 | ahc_lock(ahc, &flags); |
597487b9 | 2451 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 | 2452 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2453 | ahc_unlock(ahc, &flags); | |
2454 | } | |
2455 | ||
ace4e718 JB |
2456 | #if 0 |
2457 | /* FIXME: This code claims to support IU and QAS. However, the actual | |
2458 | * sequencer code and aic7xxx_core have no support for these parameters and | |
2459 | * will get into a bad state if they're negotiated. Do not enable this | |
2460 | * unless you know what you're doing */ | |
92d161c3 | 2461 | static void ahc_linux_set_qas(struct scsi_target *starget, int qas) |
2462 | { | |
2463 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2464 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2465 | struct ahc_tmode_tstate *tstate; | |
2466 | struct ahc_initiator_tinfo *tinfo | |
2467 | = ahc_fetch_transinfo(ahc, | |
2468 | starget->channel + 'A', | |
2469 | shost->this_id, starget->id, &tstate); | |
2470 | struct ahc_devinfo devinfo; | |
597487b9 | 2471 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2472 | & ~MSG_EXT_PPR_QAS_REQ; |
597487b9 | 2473 | unsigned int period = tinfo->goal.period; |
92d161c3 | 2474 | unsigned long flags; |
2475 | struct ahc_syncrate *syncrate; | |
2476 | ||
2477 | if (qas) | |
2478 | ppr_options |= MSG_EXT_PPR_QAS_REQ; | |
2479 | ||
2480 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2481 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2482 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
92d161c3 | 2483 | ahc_lock(ahc, &flags); |
597487b9 | 2484 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 | 2485 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2486 | ahc_unlock(ahc, &flags); | |
2487 | } | |
2488 | ||
92d161c3 | 2489 | static void ahc_linux_set_iu(struct scsi_target *starget, int iu) |
2490 | { | |
2491 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2492 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2493 | struct ahc_tmode_tstate *tstate; | |
2494 | struct ahc_initiator_tinfo *tinfo | |
2495 | = ahc_fetch_transinfo(ahc, | |
2496 | starget->channel + 'A', | |
2497 | shost->this_id, starget->id, &tstate); | |
2498 | struct ahc_devinfo devinfo; | |
597487b9 | 2499 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2500 | & ~MSG_EXT_PPR_IU_REQ; |
597487b9 | 2501 | unsigned int period = tinfo->goal.period; |
92d161c3 | 2502 | unsigned long flags; |
2503 | struct ahc_syncrate *syncrate; | |
2504 | ||
2505 | if (iu) | |
2506 | ppr_options |= MSG_EXT_PPR_IU_REQ; | |
2507 | ||
2508 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2509 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2510 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
92d161c3 | 2511 | ahc_lock(ahc, &flags); |
597487b9 | 2512 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 | 2513 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2514 | ahc_unlock(ahc, &flags); | |
2515 | } | |
ace4e718 | 2516 | #endif |
92d161c3 | 2517 | |
b2d8bfe1 JB |
2518 | static void ahc_linux_get_signalling(struct Scsi_Host *shost) |
2519 | { | |
2520 | struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; | |
cf2b5d3f | 2521 | unsigned long flags; |
3e3c60e3 | 2522 | u8 mode; |
b2d8bfe1 | 2523 | |
3e3c60e3 JB |
2524 | if (!(ahc->features & AHC_ULTRA2)) { |
2525 | /* non-LVD chipset, may not have SBLKCTL reg */ | |
b2d8bfe1 JB |
2526 | spi_signalling(shost) = |
2527 | ahc->features & AHC_HVD ? | |
2528 | SPI_SIGNAL_HVD : | |
2529 | SPI_SIGNAL_SE; | |
3e3c60e3 JB |
2530 | return; |
2531 | } | |
2532 | ||
cf2b5d3f DL |
2533 | ahc_lock(ahc, &flags); |
2534 | ahc_pause(ahc); | |
3e3c60e3 | 2535 | mode = ahc_inb(ahc, SBLKCTL); |
cf2b5d3f DL |
2536 | ahc_unpause(ahc); |
2537 | ahc_unlock(ahc, &flags); | |
3e3c60e3 JB |
2538 | |
2539 | if (mode & ENAB40) | |
2540 | spi_signalling(shost) = SPI_SIGNAL_LVD; | |
2541 | else if (mode & ENAB20) | |
2542 | spi_signalling(shost) = SPI_SIGNAL_SE; | |
b2d8bfe1 JB |
2543 | else |
2544 | spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; | |
2545 | } | |
2546 | ||
92d161c3 | 2547 | static struct spi_function_template ahc_linux_transport_functions = { |
92d161c3 | 2548 | .set_offset = ahc_linux_set_offset, |
2549 | .show_offset = 1, | |
92d161c3 | 2550 | .set_period = ahc_linux_set_period, |
2551 | .show_period = 1, | |
92d161c3 | 2552 | .set_width = ahc_linux_set_width, |
2553 | .show_width = 1, | |
92d161c3 | 2554 | .set_dt = ahc_linux_set_dt, |
2555 | .show_dt = 1, | |
ace4e718 | 2556 | #if 0 |
92d161c3 | 2557 | .set_iu = ahc_linux_set_iu, |
2558 | .show_iu = 1, | |
92d161c3 | 2559 | .set_qas = ahc_linux_set_qas, |
2560 | .show_qas = 1, | |
ace4e718 | 2561 | #endif |
b2d8bfe1 | 2562 | .get_signalling = ahc_linux_get_signalling, |
92d161c3 | 2563 | }; |
2564 | ||
2565 | ||
2566 | ||
1da177e4 LT |
2567 | static int __init |
2568 | ahc_linux_init(void) | |
2569 | { | |
dfd287f6 CH |
2570 | /* |
2571 | * If we've been passed any parameters, process them now. | |
2572 | */ | |
2573 | if (aic7xxx) | |
2574 | aic7xxx_setup(aic7xxx); | |
2575 | ||
2576 | ahc_linux_transport_template = | |
2577 | spi_attach_transport(&ahc_linux_transport_functions); | |
92d161c3 | 2578 | if (!ahc_linux_transport_template) |
2579 | return -ENODEV; | |
dfd287f6 | 2580 | |
b1abb4d6 JB |
2581 | scsi_transport_reserve_device(ahc_linux_transport_template, |
2582 | sizeof(struct ahc_linux_device)); | |
dfd287f6 | 2583 | |
dfd287f6 CH |
2584 | ahc_linux_pci_init(); |
2585 | ahc_linux_eisa_init(); | |
2586 | return 0; | |
1da177e4 LT |
2587 | } |
2588 | ||
2589 | static void | |
2590 | ahc_linux_exit(void) | |
2591 | { | |
1da177e4 LT |
2592 | ahc_linux_pci_exit(); |
2593 | ahc_linux_eisa_exit(); | |
92d161c3 | 2594 | spi_release_transport(ahc_linux_transport_template); |
1da177e4 LT |
2595 | } |
2596 | ||
2597 | module_init(ahc_linux_init); | |
2598 | module_exit(ahc_linux_exit); |