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1da177e4 LT |
1 | /* |
2 | * Adaptec AIC7xxx device driver for Linux. | |
3 | * | |
4 | * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $ | |
5 | * | |
6 | * Copyright (c) 1994 John Aycock | |
7 | * The University of Calgary Department of Computer Science. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2, or (at your option) | |
12 | * any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; see the file COPYING. If not, write to | |
21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | * | |
23 | * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F | |
24 | * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA | |
25 | * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide, | |
26 | * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux, | |
27 | * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file | |
28 | * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual, | |
29 | * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the | |
30 | * ANSI SCSI-2 specification (draft 10c), ... | |
31 | * | |
32 | * -------------------------------------------------------------------------- | |
33 | * | |
34 | * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org): | |
35 | * | |
36 | * Substantially modified to include support for wide and twin bus | |
37 | * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes, | |
38 | * SCB paging, and other rework of the code. | |
39 | * | |
40 | * -------------------------------------------------------------------------- | |
41 | * Copyright (c) 1994-2000 Justin T. Gibbs. | |
42 | * Copyright (c) 2000-2001 Adaptec Inc. | |
43 | * All rights reserved. | |
44 | * | |
45 | * Redistribution and use in source and binary forms, with or without | |
46 | * modification, are permitted provided that the following conditions | |
47 | * are met: | |
48 | * 1. Redistributions of source code must retain the above copyright | |
49 | * notice, this list of conditions, and the following disclaimer, | |
50 | * without modification. | |
51 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
52 | * substantially similar to the "NO WARRANTY" disclaimer below | |
53 | * ("Disclaimer") and any redistribution must be conditioned upon | |
54 | * including a substantially similar Disclaimer requirement for further | |
55 | * binary redistribution. | |
56 | * 3. Neither the names of the above-listed copyright holders nor the names | |
57 | * of any contributors may be used to endorse or promote products derived | |
58 | * from this software without specific prior written permission. | |
59 | * | |
60 | * Alternatively, this software may be distributed under the terms of the | |
61 | * GNU General Public License ("GPL") version 2 as published by the Free | |
62 | * Software Foundation. | |
63 | * | |
64 | * NO WARRANTY | |
65 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
66 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
67 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
68 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
69 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
70 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
71 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
72 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
73 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
74 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
75 | * POSSIBILITY OF SUCH DAMAGES. | |
76 | * | |
77 | *--------------------------------------------------------------------------- | |
78 | * | |
79 | * Thanks also go to (in alphabetical order) the following: | |
80 | * | |
81 | * Rory Bolt - Sequencer bug fixes | |
82 | * Jay Estabrook - Initial DEC Alpha support | |
83 | * Doug Ledford - Much needed abort/reset bug fixes | |
84 | * Kai Makisara - DMAing of SCBs | |
85 | * | |
86 | * A Boot time option was also added for not resetting the scsi bus. | |
87 | * | |
88 | * Form: aic7xxx=extended | |
89 | * aic7xxx=no_reset | |
90 | * aic7xxx=verbose | |
91 | * | |
92 | * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97 | |
93 | * | |
94 | * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp | |
95 | */ | |
96 | ||
97 | /* | |
98 | * Further driver modifications made by Doug Ledford <dledford@redhat.com> | |
99 | * | |
100 | * Copyright (c) 1997-1999 Doug Ledford | |
101 | * | |
102 | * These changes are released under the same licensing terms as the FreeBSD | |
103 | * driver written by Justin Gibbs. Please see his Copyright notice above | |
104 | * for the exact terms and conditions covering my changes as well as the | |
105 | * warranty statement. | |
106 | * | |
107 | * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include | |
108 | * but are not limited to: | |
109 | * | |
110 | * 1: Import of the latest FreeBSD sequencer code for this driver | |
111 | * 2: Modification of kernel code to accommodate different sequencer semantics | |
112 | * 3: Extensive changes throughout kernel portion of driver to improve | |
113 | * abort/reset processing and error hanndling | |
114 | * 4: Other work contributed by various people on the Internet | |
115 | * 5: Changes to printk information and verbosity selection code | |
116 | * 6: General reliability related changes, especially in IRQ management | |
117 | * 7: Modifications to the default probe/attach order for supported cards | |
118 | * 8: SMP friendliness has been improved | |
119 | * | |
120 | */ | |
121 | ||
122 | #include "aic7xxx_osm.h" | |
123 | #include "aic7xxx_inline.h" | |
124 | #include <scsi/scsicam.h> | |
92d161c3 JB |
125 | |
126 | static struct scsi_transport_template *ahc_linux_transport_template = NULL; | |
1da177e4 | 127 | |
1da177e4 | 128 | #include <linux/init.h> /* __setup */ |
1da177e4 LT |
129 | #include <linux/mm.h> /* For fetching system memory size */ |
130 | #include <linux/blkdev.h> /* For block_size() */ | |
131 | #include <linux/delay.h> /* For ssleep/msleep */ | |
132 | ||
1da177e4 | 133 | |
1da177e4 LT |
134 | /* |
135 | * Set this to the delay in seconds after SCSI bus reset. | |
136 | * Note, we honor this only for the initial bus reset. | |
137 | * The scsi error recovery code performs its own bus settle | |
138 | * delay handling for error recovery actions. | |
139 | */ | |
140 | #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS | |
141 | #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS | |
142 | #else | |
143 | #define AIC7XXX_RESET_DELAY 5000 | |
144 | #endif | |
145 | ||
146 | /* | |
147 | * Control collection of SCSI transfer statistics for the /proc filesystem. | |
148 | * | |
149 | * NOTE: Do NOT enable this when running on kernels version 1.2.x and below. | |
150 | * NOTE: This does affect performance since it has to maintain statistics. | |
151 | */ | |
152 | #ifdef CONFIG_AIC7XXX_PROC_STATS | |
153 | #define AIC7XXX_PROC_STATS | |
154 | #endif | |
155 | ||
156 | /* | |
157 | * To change the default number of tagged transactions allowed per-device, | |
158 | * add a line to the lilo.conf file like: | |
159 | * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" | |
160 | * which will result in the first four devices on the first two | |
161 | * controllers being set to a tagged queue depth of 32. | |
162 | * | |
163 | * The tag_commands is an array of 16 to allow for wide and twin adapters. | |
164 | * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 | |
165 | * for channel 1. | |
166 | */ | |
167 | typedef struct { | |
168 | uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ | |
169 | } adapter_tag_info_t; | |
170 | ||
171 | /* | |
172 | * Modify this as you see fit for your system. | |
173 | * | |
174 | * 0 tagged queuing disabled | |
175 | * 1 <= n <= 253 n == max tags ever dispatched. | |
176 | * | |
177 | * The driver will throttle the number of commands dispatched to a | |
178 | * device if it returns queue full. For devices with a fixed maximum | |
179 | * queue depth, the driver will eventually determine this depth and | |
180 | * lock it in (a console message is printed to indicate that a lock | |
181 | * has occurred). On some devices, queue full is returned for a temporary | |
182 | * resource shortage. These devices will return queue full at varying | |
183 | * depths. The driver will throttle back when the queue fulls occur and | |
184 | * attempt to slowly increase the depth over time as the device recovers | |
185 | * from the resource shortage. | |
186 | * | |
187 | * In this example, the first line will disable tagged queueing for all | |
188 | * the devices on the first probed aic7xxx adapter. | |
189 | * | |
190 | * The second line enables tagged queueing with 4 commands/LUN for IDs | |
191 | * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the | |
192 | * driver to attempt to use up to 64 tags for ID 1. | |
193 | * | |
194 | * The third line is the same as the first line. | |
195 | * | |
196 | * The fourth line disables tagged queueing for devices 0 and 3. It | |
197 | * enables tagged queueing for the other IDs, with 16 commands/LUN | |
198 | * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for | |
199 | * IDs 2, 5-7, and 9-15. | |
200 | */ | |
201 | ||
202 | /* | |
203 | * NOTE: The below structure is for reference only, the actual structure | |
204 | * to modify in order to change things is just below this comment block. | |
205 | adapter_tag_info_t aic7xxx_tag_info[] = | |
206 | { | |
207 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
208 | {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, | |
209 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, | |
210 | {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} | |
211 | }; | |
212 | */ | |
213 | ||
214 | #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE | |
215 | #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE | |
216 | #else | |
217 | #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE | |
218 | #endif | |
219 | ||
220 | #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ | |
221 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
222 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
223 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
224 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
225 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
226 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
227 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ | |
228 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ | |
229 | } | |
230 | ||
231 | /* | |
232 | * By default, use the number of commands specified by | |
233 | * the users kernel configuration. | |
234 | */ | |
235 | static adapter_tag_info_t aic7xxx_tag_info[] = | |
236 | { | |
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 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
245 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
246 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
247 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
248 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
249 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
250 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
251 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, | |
252 | {AIC7XXX_CONFIGED_TAG_COMMANDS} | |
253 | }; | |
254 | ||
1da177e4 LT |
255 | /* |
256 | * There should be a specific return value for this in scsi.h, but | |
257 | * it seems that most drivers ignore it. | |
258 | */ | |
259 | #define DID_UNDERFLOW DID_ERROR | |
260 | ||
261 | void | |
262 | ahc_print_path(struct ahc_softc *ahc, struct scb *scb) | |
263 | { | |
264 | printk("(scsi%d:%c:%d:%d): ", | |
265 | ahc->platform_data->host->host_no, | |
266 | scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', | |
267 | scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, | |
268 | scb != NULL ? SCB_GET_LUN(scb) : -1); | |
269 | } | |
270 | ||
271 | /* | |
272 | * XXX - these options apply unilaterally to _all_ 274x/284x/294x | |
273 | * cards in the system. This should be fixed. Exceptions to this | |
274 | * rule are noted in the comments. | |
275 | */ | |
276 | ||
277 | /* | |
278 | * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This | |
279 | * has no effect on any later resets that might occur due to things like | |
280 | * SCSI bus timeouts. | |
281 | */ | |
282 | static uint32_t aic7xxx_no_reset; | |
283 | ||
1da177e4 LT |
284 | /* |
285 | * Should we force EXTENDED translation on a controller. | |
286 | * 0 == Use whatever is in the SEEPROM or default to off | |
287 | * 1 == Use whatever is in the SEEPROM or default to on | |
288 | */ | |
289 | static uint32_t aic7xxx_extended; | |
290 | ||
291 | /* | |
292 | * PCI bus parity checking of the Adaptec controllers. This is somewhat | |
293 | * dubious at best. To my knowledge, this option has never actually | |
294 | * solved a PCI parity problem, but on certain machines with broken PCI | |
295 | * chipset configurations where stray PCI transactions with bad parity are | |
296 | * the norm rather than the exception, the error messages can be overwelming. | |
297 | * It's included in the driver for completeness. | |
298 | * 0 = Shut off PCI parity check | |
299 | * non-0 = reverse polarity pci parity checking | |
300 | */ | |
301 | static uint32_t aic7xxx_pci_parity = ~0; | |
302 | ||
1da177e4 LT |
303 | /* |
304 | * There are lots of broken chipsets in the world. Some of them will | |
305 | * violate the PCI spec when we issue byte sized memory writes to our | |
306 | * controller. I/O mapped register access, if allowed by the given | |
307 | * platform, will work in almost all cases. | |
308 | */ | |
309 | uint32_t aic7xxx_allow_memio = ~0; | |
310 | ||
1da177e4 LT |
311 | /* |
312 | * So that we can set how long each device is given as a selection timeout. | |
313 | * The table of values goes like this: | |
314 | * 0 - 256ms | |
315 | * 1 - 128ms | |
316 | * 2 - 64ms | |
317 | * 3 - 32ms | |
318 | * We default to 256ms because some older devices need a longer time | |
319 | * to respond to initial selection. | |
320 | */ | |
321 | static uint32_t aic7xxx_seltime; | |
322 | ||
323 | /* | |
324 | * Certain devices do not perform any aging on commands. Should the | |
325 | * device be saturated by commands in one portion of the disk, it is | |
326 | * possible for transactions on far away sectors to never be serviced. | |
327 | * To handle these devices, we can periodically send an ordered tag to | |
328 | * force all outstanding transactions to be serviced prior to a new | |
329 | * transaction. | |
330 | */ | |
331 | uint32_t aic7xxx_periodic_otag; | |
332 | ||
333 | /* | |
334 | * Module information and settable options. | |
335 | */ | |
336 | static char *aic7xxx = NULL; | |
337 | ||
338 | MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); | |
339 | MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver"); | |
340 | MODULE_LICENSE("Dual BSD/GPL"); | |
341 | MODULE_VERSION(AIC7XXX_DRIVER_VERSION); | |
342 | module_param(aic7xxx, charp, 0444); | |
343 | MODULE_PARM_DESC(aic7xxx, | |
344 | "period delimited, options string.\n" | |
345 | " verbose Enable verbose/diagnostic logging\n" | |
346 | " allow_memio Allow device registers to be memory mapped\n" | |
347 | " debug Bitmask of debug values to enable\n" | |
348 | " no_probe Toggle EISA/VLB controller probing\n" | |
349 | " probe_eisa_vl Toggle EISA/VLB controller probing\n" | |
350 | " no_reset Supress initial bus resets\n" | |
351 | " extended Enable extended geometry on all controllers\n" | |
352 | " periodic_otag Send an ordered tagged transaction\n" | |
353 | " periodically to prevent tag starvation.\n" | |
354 | " This may be required by some older disk\n" | |
355 | " drives or RAID arrays.\n" | |
356 | " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n" | |
357 | " tag_info:<tag_str> Set per-target tag depth\n" | |
358 | " global_tag_depth:<int> Global tag depth for every target\n" | |
359 | " on every bus\n" | |
1da177e4 LT |
360 | " seltime:<int> Selection Timeout\n" |
361 | " (0/256ms,1/128ms,2/64ms,3/32ms)\n" | |
362 | "\n" | |
363 | " Sample /etc/modprobe.conf line:\n" | |
364 | " Toggle EISA/VLB probing\n" | |
365 | " Set tag depth on Controller 1/Target 1 to 10 tags\n" | |
366 | " Shorten the selection timeout to 128ms\n" | |
367 | "\n" | |
368 | " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" | |
369 | ); | |
370 | ||
371 | static void ahc_linux_handle_scsi_status(struct ahc_softc *, | |
b1abb4d6 | 372 | struct scsi_device *, |
1da177e4 LT |
373 | struct scb *); |
374 | static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, | |
013791ee | 375 | struct scsi_cmnd *cmd); |
1da177e4 LT |
376 | static void ahc_linux_sem_timeout(u_long arg); |
377 | static void ahc_linux_freeze_simq(struct ahc_softc *ahc); | |
378 | static void ahc_linux_release_simq(u_long arg); | |
013791ee | 379 | static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); |
1da177e4 | 380 | static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); |
1da177e4 LT |
381 | static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, |
382 | struct ahc_devinfo *devinfo); | |
b1abb4d6 | 383 | static void ahc_linux_device_queue_depth(struct scsi_device *); |
e4e360c3 JB |
384 | static int ahc_linux_run_command(struct ahc_softc*, |
385 | struct ahc_linux_device *, | |
386 | struct scsi_cmnd *); | |
1da177e4 | 387 | static void ahc_linux_setup_tag_info_global(char *p); |
1da177e4 | 388 | static int aic7xxx_setup(char *s); |
2a40342e CH |
389 | |
390 | static int ahc_linux_unit; | |
391 | ||
1da177e4 LT |
392 | |
393 | /********************************* Inlines ************************************/ | |
1da177e4 LT |
394 | static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); |
395 | ||
396 | static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, | |
397 | struct ahc_dma_seg *sg, | |
398 | dma_addr_t addr, bus_size_t len); | |
399 | ||
1da177e4 LT |
400 | static __inline void |
401 | ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) | |
402 | { | |
013791ee | 403 | struct scsi_cmnd *cmd; |
1da177e4 LT |
404 | |
405 | cmd = scb->io_ctx; | |
406 | ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); | |
407 | if (cmd->use_sg != 0) { | |
408 | struct scatterlist *sg; | |
409 | ||
410 | sg = (struct scatterlist *)cmd->request_buffer; | |
411 | pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg, | |
be7db055 | 412 | cmd->sc_data_direction); |
1da177e4 LT |
413 | } else if (cmd->request_bufflen != 0) { |
414 | pci_unmap_single(ahc->dev_softc, | |
415 | scb->platform_data->buf_busaddr, | |
416 | cmd->request_bufflen, | |
be7db055 | 417 | cmd->sc_data_direction); |
1da177e4 LT |
418 | } |
419 | } | |
420 | ||
421 | static __inline int | |
422 | ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, | |
423 | struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) | |
424 | { | |
425 | int consumed; | |
426 | ||
427 | if ((scb->sg_count + 1) > AHC_NSEG) | |
428 | panic("Too few segs for dma mapping. " | |
429 | "Increase AHC_NSEG\n"); | |
430 | ||
431 | consumed = 1; | |
432 | sg->addr = ahc_htole32(addr & 0xFFFFFFFF); | |
433 | scb->platform_data->xfer_len += len; | |
434 | ||
435 | if (sizeof(dma_addr_t) > 4 | |
436 | && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) | |
437 | len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; | |
438 | ||
439 | sg->len = ahc_htole32(len); | |
440 | return (consumed); | |
441 | } | |
442 | ||
1da177e4 LT |
443 | /* |
444 | * Return a string describing the driver. | |
445 | */ | |
446 | static const char * | |
447 | ahc_linux_info(struct Scsi_Host *host) | |
448 | { | |
449 | static char buffer[512]; | |
450 | char ahc_info[256]; | |
451 | char *bp; | |
452 | struct ahc_softc *ahc; | |
453 | ||
454 | bp = &buffer[0]; | |
455 | ahc = *(struct ahc_softc **)host->hostdata; | |
456 | memset(bp, 0, sizeof(buffer)); | |
457 | strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev "); | |
458 | strcat(bp, AIC7XXX_DRIVER_VERSION); | |
459 | strcat(bp, "\n"); | |
460 | strcat(bp, " <"); | |
461 | strcat(bp, ahc->description); | |
462 | strcat(bp, ">\n"); | |
463 | strcat(bp, " "); | |
464 | ahc_controller_info(ahc, ahc_info); | |
465 | strcat(bp, ahc_info); | |
466 | strcat(bp, "\n"); | |
467 | ||
468 | return (bp); | |
469 | } | |
470 | ||
471 | /* | |
472 | * Queue an SCB to the controller. | |
473 | */ | |
474 | static int | |
013791ee | 475 | ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) |
1da177e4 LT |
476 | { |
477 | struct ahc_softc *ahc; | |
b1abb4d6 | 478 | struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); |
6d5e9fd1 CH |
479 | int rtn = SCSI_MLQUEUE_HOST_BUSY; |
480 | unsigned long flags; | |
1da177e4 LT |
481 | |
482 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
483 | ||
6d5e9fd1 CH |
484 | ahc_lock(ahc, &flags); |
485 | if (ahc->platform_data->qfrozen == 0) { | |
486 | cmd->scsi_done = scsi_done; | |
487 | cmd->result = CAM_REQ_INPROG << 16; | |
488 | rtn = ahc_linux_run_command(ahc, dev, cmd); | |
489 | } | |
490 | ahc_unlock(ahc, &flags); | |
e4e360c3 | 491 | |
6d5e9fd1 | 492 | return rtn; |
1da177e4 LT |
493 | } |
494 | ||
b1abb4d6 JB |
495 | static inline struct scsi_target ** |
496 | ahc_linux_target_in_softc(struct scsi_target *starget) | |
1da177e4 | 497 | { |
b1abb4d6 JB |
498 | struct ahc_softc *ahc = |
499 | *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); | |
fb3089df | 500 | unsigned int target_offset; |
b1abb4d6 JB |
501 | |
502 | target_offset = starget->id; | |
503 | if (starget->channel != 0) | |
504 | target_offset += 8; | |
505 | ||
506 | return &ahc->platform_data->starget[target_offset]; | |
507 | } | |
508 | ||
509 | static int | |
510 | ahc_linux_target_alloc(struct scsi_target *starget) | |
511 | { | |
512 | struct ahc_softc *ahc = | |
513 | *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); | |
514 | struct seeprom_config *sc = ahc->seep_config; | |
fb3089df | 515 | unsigned long flags; |
b1abb4d6 JB |
516 | struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); |
517 | struct ahc_linux_target *targ = scsi_transport_target_data(starget); | |
518 | unsigned short scsirate; | |
519 | struct ahc_devinfo devinfo; | |
520 | struct ahc_initiator_tinfo *tinfo; | |
521 | struct ahc_tmode_tstate *tstate; | |
522 | char channel = starget->channel + 'A'; | |
523 | unsigned int our_id = ahc->our_id; | |
524 | unsigned int target_offset; | |
c7525233 JB |
525 | |
526 | target_offset = starget->id; | |
527 | if (starget->channel != 0) | |
528 | target_offset += 8; | |
b1abb4d6 JB |
529 | |
530 | if (starget->channel) | |
531 | our_id = ahc->our_id_b; | |
1da177e4 | 532 | |
fb3089df | 533 | ahc_lock(ahc, &flags); |
fb3089df | 534 | |
b1abb4d6 | 535 | BUG_ON(*ahc_targp != NULL); |
c7525233 | 536 | |
b1abb4d6 JB |
537 | *ahc_targp = starget; |
538 | memset(targ, 0, sizeof(*targ)); | |
c7525233 | 539 | |
b1abb4d6 | 540 | if (sc) { |
12021fff JB |
541 | int maxsync = AHC_SYNCRATE_DT; |
542 | int ultra = 0; | |
543 | int flags = sc->device_flags[target_offset]; | |
544 | ||
545 | if (ahc->flags & AHC_NEWEEPROM_FMT) { | |
546 | if (flags & CFSYNCHISULTRA) | |
547 | ultra = 1; | |
548 | } else if (flags & CFULTRAEN) | |
549 | ultra = 1; | |
550 | /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 | |
551 | * change it to ultra=0, CFXFER = 0 */ | |
552 | if(ultra && (flags & CFXFER) == 0x04) { | |
553 | ultra = 0; | |
554 | flags &= ~CFXFER; | |
555 | } | |
556 | ||
b1abb4d6 | 557 | if ((ahc->features & AHC_ULTRA2) != 0) { |
12021fff | 558 | scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); |
b1abb4d6 | 559 | } else { |
12021fff JB |
560 | scsirate = (flags & CFXFER) << 4; |
561 | maxsync = ultra ? AHC_SYNCRATE_ULTRA : | |
562 | AHC_SYNCRATE_FAST; | |
c7525233 | 563 | } |
12021fff JB |
564 | spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; |
565 | if (!(flags & CFSYNCH)) | |
566 | spi_max_offset(starget) = 0; | |
b1abb4d6 | 567 | spi_min_period(starget) = |
12021fff JB |
568 | ahc_find_period(ahc, scsirate, maxsync); |
569 | ||
b1abb4d6 JB |
570 | tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, |
571 | starget->id, &tstate); | |
c7525233 | 572 | } |
b1abb4d6 JB |
573 | ahc_compile_devinfo(&devinfo, our_id, starget->id, |
574 | CAM_LUN_WILDCARD, channel, | |
575 | ROLE_INITIATOR); | |
576 | ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, | |
577 | AHC_TRANS_GOAL, /*paused*/FALSE); | |
578 | ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, | |
579 | AHC_TRANS_GOAL, /*paused*/FALSE); | |
fb3089df | 580 | ahc_unlock(ahc, &flags); |
b1abb4d6 JB |
581 | |
582 | return 0; | |
583 | } | |
584 | ||
585 | static void | |
586 | ahc_linux_target_destroy(struct scsi_target *starget) | |
587 | { | |
588 | struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); | |
589 | ||
590 | *ahc_targp = NULL; | |
591 | } | |
592 | ||
593 | static int | |
594 | ahc_linux_slave_alloc(struct scsi_device *sdev) | |
595 | { | |
596 | struct ahc_softc *ahc = | |
597 | *((struct ahc_softc **)sdev->host->hostdata); | |
598 | struct scsi_target *starget = sdev->sdev_target; | |
599 | struct ahc_linux_target *targ = scsi_transport_target_data(starget); | |
600 | struct ahc_linux_device *dev; | |
601 | ||
602 | if (bootverbose) | |
603 | printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); | |
604 | ||
605 | BUG_ON(targ->sdev[sdev->lun] != NULL); | |
606 | ||
607 | dev = scsi_transport_device_data(sdev); | |
608 | memset(dev, 0, sizeof(*dev)); | |
609 | ||
610 | /* | |
611 | * We start out life using untagged | |
612 | * transactions of which we allow one. | |
613 | */ | |
614 | dev->openings = 1; | |
615 | ||
616 | /* | |
617 | * Set maxtags to 0. This will be changed if we | |
618 | * later determine that we are dealing with | |
619 | * a tagged queuing capable device. | |
620 | */ | |
621 | dev->maxtags = 0; | |
622 | ||
623 | targ->sdev[sdev->lun] = sdev; | |
624 | ||
79778a27 JB |
625 | spi_period(starget) = 0; |
626 | ||
b1abb4d6 | 627 | return 0; |
1da177e4 LT |
628 | } |
629 | ||
630 | static int | |
b1abb4d6 | 631 | ahc_linux_slave_configure(struct scsi_device *sdev) |
1da177e4 LT |
632 | { |
633 | struct ahc_softc *ahc; | |
1da177e4 | 634 | |
b1abb4d6 | 635 | ahc = *((struct ahc_softc **)sdev->host->hostdata); |
c7525233 | 636 | |
1da177e4 | 637 | if (bootverbose) |
017560fc | 638 | sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); |
c7525233 | 639 | |
b1abb4d6 | 640 | ahc_linux_device_queue_depth(sdev); |
cb624029 JB |
641 | |
642 | /* Initial Domain Validation */ | |
b1abb4d6 JB |
643 | if (!spi_initial_dv(sdev->sdev_target)) |
644 | spi_dv_device(sdev); | |
cb624029 | 645 | |
c7525233 | 646 | return 0; |
1da177e4 LT |
647 | } |
648 | ||
649 | static void | |
b1abb4d6 | 650 | ahc_linux_slave_destroy(struct scsi_device *sdev) |
1da177e4 LT |
651 | { |
652 | struct ahc_softc *ahc; | |
b1abb4d6 JB |
653 | struct ahc_linux_device *dev = scsi_transport_device_data(sdev); |
654 | struct ahc_linux_target *targ = scsi_transport_target_data(sdev->sdev_target); | |
1da177e4 | 655 | |
b1abb4d6 | 656 | ahc = *((struct ahc_softc **)sdev->host->hostdata); |
1da177e4 | 657 | if (bootverbose) |
b1abb4d6 | 658 | printf("%s: Slave Destroy %d\n", ahc_name(ahc), sdev->id); |
c7525233 JB |
659 | |
660 | BUG_ON(dev->active); | |
661 | ||
b1abb4d6 | 662 | targ->sdev[sdev->lun] = NULL; |
1da177e4 | 663 | } |
1da177e4 LT |
664 | |
665 | #if defined(__i386__) | |
666 | /* | |
667 | * Return the disk geometry for the given SCSI device. | |
668 | */ | |
669 | static int | |
1da177e4 LT |
670 | ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
671 | sector_t capacity, int geom[]) | |
672 | { | |
673 | uint8_t *bh; | |
1da177e4 LT |
674 | int heads; |
675 | int sectors; | |
676 | int cylinders; | |
677 | int ret; | |
678 | int extended; | |
679 | struct ahc_softc *ahc; | |
680 | u_int channel; | |
681 | ||
682 | ahc = *((struct ahc_softc **)sdev->host->hostdata); | |
422c0d61 | 683 | channel = sdev_channel(sdev); |
1da177e4 | 684 | |
1da177e4 | 685 | bh = scsi_bios_ptable(bdev); |
1da177e4 LT |
686 | if (bh) { |
687 | ret = scsi_partsize(bh, capacity, | |
688 | &geom[2], &geom[0], &geom[1]); | |
1da177e4 | 689 | kfree(bh); |
1da177e4 LT |
690 | if (ret != -1) |
691 | return (ret); | |
692 | } | |
693 | heads = 64; | |
694 | sectors = 32; | |
695 | cylinders = aic_sector_div(capacity, heads, sectors); | |
696 | ||
697 | if (aic7xxx_extended != 0) | |
698 | extended = 1; | |
699 | else if (channel == 0) | |
700 | extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; | |
701 | else | |
702 | extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; | |
703 | if (extended && cylinders >= 1024) { | |
704 | heads = 255; | |
705 | sectors = 63; | |
706 | cylinders = aic_sector_div(capacity, heads, sectors); | |
707 | } | |
708 | geom[0] = heads; | |
709 | geom[1] = sectors; | |
710 | geom[2] = cylinders; | |
711 | return (0); | |
712 | } | |
713 | #endif | |
714 | ||
715 | /* | |
716 | * Abort the current SCSI command(s). | |
717 | */ | |
718 | static int | |
013791ee | 719 | ahc_linux_abort(struct scsi_cmnd *cmd) |
1da177e4 LT |
720 | { |
721 | int error; | |
722 | ||
723 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); | |
724 | if (error != 0) | |
725 | printf("aic7xxx_abort returns 0x%x\n", error); | |
726 | return (error); | |
727 | } | |
728 | ||
729 | /* | |
730 | * Attempt to send a target reset message to the device that timed out. | |
731 | */ | |
732 | static int | |
013791ee | 733 | ahc_linux_dev_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
734 | { |
735 | int error; | |
736 | ||
737 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); | |
738 | if (error != 0) | |
739 | printf("aic7xxx_dev_reset returns 0x%x\n", error); | |
740 | return (error); | |
741 | } | |
742 | ||
743 | /* | |
744 | * Reset the SCSI bus. | |
745 | */ | |
746 | static int | |
013791ee | 747 | ahc_linux_bus_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
748 | { |
749 | struct ahc_softc *ahc; | |
1da177e4 | 750 | int found; |
68b3aa7c | 751 | unsigned long flags; |
1da177e4 LT |
752 | |
753 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
68b3aa7c JG |
754 | |
755 | ahc_lock(ahc, &flags); | |
422c0d61 | 756 | found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', |
1da177e4 | 757 | /*initiate reset*/TRUE); |
68b3aa7c | 758 | ahc_unlock(ahc, &flags); |
1da177e4 LT |
759 | |
760 | if (bootverbose) | |
761 | printf("%s: SCSI bus reset delivered. " | |
762 | "%d SCBs aborted.\n", ahc_name(ahc), found); | |
763 | ||
764 | return SUCCESS; | |
765 | } | |
766 | ||
013791ee | 767 | struct scsi_host_template aic7xxx_driver_template = { |
1da177e4 LT |
768 | .module = THIS_MODULE, |
769 | .name = "aic7xxx", | |
dfd287f6 | 770 | .proc_name = "aic7xxx", |
1da177e4 LT |
771 | .proc_info = ahc_linux_proc_info, |
772 | .info = ahc_linux_info, | |
773 | .queuecommand = ahc_linux_queue, | |
774 | .eh_abort_handler = ahc_linux_abort, | |
775 | .eh_device_reset_handler = ahc_linux_dev_reset, | |
776 | .eh_bus_reset_handler = ahc_linux_bus_reset, | |
777 | #if defined(__i386__) | |
778 | .bios_param = ahc_linux_biosparam, | |
779 | #endif | |
780 | .can_queue = AHC_MAX_QUEUE, | |
781 | .this_id = -1, | |
782 | .cmd_per_lun = 2, | |
783 | .use_clustering = ENABLE_CLUSTERING, | |
784 | .slave_alloc = ahc_linux_slave_alloc, | |
785 | .slave_configure = ahc_linux_slave_configure, | |
786 | .slave_destroy = ahc_linux_slave_destroy, | |
b1abb4d6 JB |
787 | .target_alloc = ahc_linux_target_alloc, |
788 | .target_destroy = ahc_linux_target_destroy, | |
1da177e4 LT |
789 | }; |
790 | ||
791 | /**************************** Tasklet Handler *********************************/ | |
792 | ||
1da177e4 LT |
793 | /******************************** Macros **************************************/ |
794 | #define BUILD_SCSIID(ahc, cmd) \ | |
795 | ((((cmd)->device->id << TID_SHIFT) & TID) \ | |
796 | | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ | |
797 | | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) | |
798 | ||
799 | /******************************** Bus DMA *************************************/ | |
800 | int | |
801 | ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, | |
802 | bus_size_t alignment, bus_size_t boundary, | |
803 | dma_addr_t lowaddr, dma_addr_t highaddr, | |
804 | bus_dma_filter_t *filter, void *filterarg, | |
805 | bus_size_t maxsize, int nsegments, | |
806 | bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) | |
807 | { | |
808 | bus_dma_tag_t dmat; | |
809 | ||
810 | dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); | |
811 | if (dmat == NULL) | |
812 | return (ENOMEM); | |
813 | ||
814 | /* | |
815 | * Linux is very simplistic about DMA memory. For now don't | |
816 | * maintain all specification information. Once Linux supplies | |
817 | * better facilities for doing these operations, or the | |
818 | * needs of this particular driver change, we might need to do | |
819 | * more here. | |
820 | */ | |
821 | dmat->alignment = alignment; | |
822 | dmat->boundary = boundary; | |
823 | dmat->maxsize = maxsize; | |
824 | *ret_tag = dmat; | |
825 | return (0); | |
826 | } | |
827 | ||
828 | void | |
829 | ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) | |
830 | { | |
831 | free(dmat, M_DEVBUF); | |
832 | } | |
833 | ||
834 | int | |
835 | ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, | |
836 | int flags, bus_dmamap_t *mapp) | |
837 | { | |
1da177e4 | 838 | *vaddr = pci_alloc_consistent(ahc->dev_softc, |
7dfa0f26 | 839 | dmat->maxsize, mapp); |
1da177e4 | 840 | if (*vaddr == NULL) |
7dfa0f26 CH |
841 | return ENOMEM; |
842 | return 0; | |
1da177e4 LT |
843 | } |
844 | ||
845 | void | |
846 | ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, | |
847 | void* vaddr, bus_dmamap_t map) | |
848 | { | |
849 | pci_free_consistent(ahc->dev_softc, dmat->maxsize, | |
7dfa0f26 | 850 | vaddr, map); |
1da177e4 LT |
851 | } |
852 | ||
853 | int | |
854 | ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, | |
855 | void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, | |
856 | void *cb_arg, int flags) | |
857 | { | |
858 | /* | |
859 | * Assume for now that this will only be used during | |
860 | * initialization and not for per-transaction buffer mapping. | |
861 | */ | |
862 | bus_dma_segment_t stack_sg; | |
863 | ||
7dfa0f26 | 864 | stack_sg.ds_addr = map; |
1da177e4 LT |
865 | stack_sg.ds_len = dmat->maxsize; |
866 | cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); | |
867 | return (0); | |
868 | } | |
869 | ||
870 | void | |
871 | ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | |
872 | { | |
1da177e4 LT |
873 | } |
874 | ||
875 | int | |
876 | ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | |
877 | { | |
878 | /* Nothing to do */ | |
879 | return (0); | |
880 | } | |
881 | ||
1da177e4 LT |
882 | static void |
883 | ahc_linux_setup_tag_info_global(char *p) | |
884 | { | |
885 | int tags, i, j; | |
886 | ||
887 | tags = simple_strtoul(p + 1, NULL, 0) & 0xff; | |
888 | printf("Setting Global Tags= %d\n", tags); | |
889 | ||
890 | for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) { | |
891 | for (j = 0; j < AHC_NUM_TARGETS; j++) { | |
892 | aic7xxx_tag_info[i].tag_commands[j] = tags; | |
893 | } | |
894 | } | |
895 | } | |
896 | ||
897 | static void | |
898 | ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) | |
899 | { | |
900 | ||
901 | if ((instance >= 0) && (targ >= 0) | |
902 | && (instance < NUM_ELEMENTS(aic7xxx_tag_info)) | |
903 | && (targ < AHC_NUM_TARGETS)) { | |
904 | aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; | |
905 | if (bootverbose) | |
906 | printf("tag_info[%d:%d] = %d\n", instance, targ, value); | |
907 | } | |
908 | } | |
909 | ||
1ff92730 CH |
910 | static char * |
911 | ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, | |
912 | void (*callback)(u_long, int, int, int32_t), | |
913 | u_long callback_arg) | |
914 | { | |
915 | char *tok_end; | |
916 | char *tok_end2; | |
917 | int i; | |
918 | int instance; | |
919 | int targ; | |
920 | int done; | |
921 | char tok_list[] = {'.', ',', '{', '}', '\0'}; | |
922 | ||
923 | /* All options use a ':' name/arg separator */ | |
924 | if (*opt_arg != ':') | |
925 | return (opt_arg); | |
926 | opt_arg++; | |
927 | instance = -1; | |
928 | targ = -1; | |
929 | done = FALSE; | |
930 | /* | |
931 | * Restore separator that may be in | |
932 | * the middle of our option argument. | |
933 | */ | |
934 | tok_end = strchr(opt_arg, '\0'); | |
935 | if (tok_end < end) | |
936 | *tok_end = ','; | |
937 | while (!done) { | |
938 | switch (*opt_arg) { | |
939 | case '{': | |
940 | if (instance == -1) { | |
941 | instance = 0; | |
942 | } else { | |
943 | if (depth > 1) { | |
944 | if (targ == -1) | |
945 | targ = 0; | |
946 | } else { | |
947 | printf("Malformed Option %s\n", | |
948 | opt_name); | |
949 | done = TRUE; | |
950 | } | |
951 | } | |
952 | opt_arg++; | |
953 | break; | |
954 | case '}': | |
955 | if (targ != -1) | |
956 | targ = -1; | |
957 | else if (instance != -1) | |
958 | instance = -1; | |
959 | opt_arg++; | |
960 | break; | |
961 | case ',': | |
962 | case '.': | |
963 | if (instance == -1) | |
964 | done = TRUE; | |
965 | else if (targ >= 0) | |
966 | targ++; | |
967 | else if (instance >= 0) | |
968 | instance++; | |
969 | opt_arg++; | |
970 | break; | |
971 | case '\0': | |
972 | done = TRUE; | |
973 | break; | |
974 | default: | |
975 | tok_end = end; | |
976 | for (i = 0; tok_list[i]; i++) { | |
977 | tok_end2 = strchr(opt_arg, tok_list[i]); | |
978 | if ((tok_end2) && (tok_end2 < tok_end)) | |
979 | tok_end = tok_end2; | |
980 | } | |
981 | callback(callback_arg, instance, targ, | |
982 | simple_strtol(opt_arg, NULL, 0)); | |
983 | opt_arg = tok_end; | |
984 | break; | |
985 | } | |
986 | } | |
987 | return (opt_arg); | |
988 | } | |
989 | ||
1da177e4 LT |
990 | /* |
991 | * Handle Linux boot parameters. This routine allows for assigning a value | |
992 | * to a parameter with a ':' between the parameter and the value. | |
993 | * ie. aic7xxx=stpwlev:1,extended | |
994 | */ | |
995 | static int | |
996 | aic7xxx_setup(char *s) | |
997 | { | |
998 | int i, n; | |
999 | char *p; | |
1000 | char *end; | |
1001 | ||
1002 | static struct { | |
1003 | const char *name; | |
1004 | uint32_t *flag; | |
1005 | } options[] = { | |
1006 | { "extended", &aic7xxx_extended }, | |
1007 | { "no_reset", &aic7xxx_no_reset }, | |
1008 | { "verbose", &aic7xxx_verbose }, | |
1009 | { "allow_memio", &aic7xxx_allow_memio}, | |
1010 | #ifdef AHC_DEBUG | |
1011 | { "debug", &ahc_debug }, | |
1012 | #endif | |
1da177e4 LT |
1013 | { "periodic_otag", &aic7xxx_periodic_otag }, |
1014 | { "pci_parity", &aic7xxx_pci_parity }, | |
1015 | { "seltime", &aic7xxx_seltime }, | |
1016 | { "tag_info", NULL }, | |
1017 | { "global_tag_depth", NULL }, | |
1018 | { "dv", NULL } | |
1019 | }; | |
1020 | ||
1021 | end = strchr(s, '\0'); | |
1022 | ||
1023 | /* | |
1024 | * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS | |
1025 | * will never be 0 in this case. | |
1026 | */ | |
1027 | n = 0; | |
1028 | ||
1029 | while ((p = strsep(&s, ",.")) != NULL) { | |
1030 | if (*p == '\0') | |
1031 | continue; | |
1032 | for (i = 0; i < NUM_ELEMENTS(options); i++) { | |
1033 | ||
1034 | n = strlen(options[i].name); | |
1035 | if (strncmp(options[i].name, p, n) == 0) | |
1036 | break; | |
1037 | } | |
1038 | if (i == NUM_ELEMENTS(options)) | |
1039 | continue; | |
1040 | ||
1041 | if (strncmp(p, "global_tag_depth", n) == 0) { | |
1042 | ahc_linux_setup_tag_info_global(p + n); | |
1043 | } else if (strncmp(p, "tag_info", n) == 0) { | |
1ff92730 | 1044 | s = ahc_parse_brace_option("tag_info", p + n, end, |
1da177e4 | 1045 | 2, ahc_linux_setup_tag_info, 0); |
1da177e4 LT |
1046 | } else if (p[n] == ':') { |
1047 | *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); | |
1048 | } else if (strncmp(p, "verbose", n) == 0) { | |
1049 | *(options[i].flag) = 1; | |
1050 | } else { | |
1051 | *(options[i].flag) ^= 0xFFFFFFFF; | |
1052 | } | |
1053 | } | |
1054 | return 1; | |
1055 | } | |
1056 | ||
1057 | __setup("aic7xxx=", aic7xxx_setup); | |
1058 | ||
1059 | uint32_t aic7xxx_verbose; | |
1060 | ||
1061 | int | |
013791ee | 1062 | ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) |
1da177e4 LT |
1063 | { |
1064 | char buf[80]; | |
1065 | struct Scsi_Host *host; | |
1066 | char *new_name; | |
1067 | u_long s; | |
1da177e4 LT |
1068 | |
1069 | template->name = ahc->description; | |
1070 | host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); | |
1071 | if (host == NULL) | |
1072 | return (ENOMEM); | |
1073 | ||
1074 | *((struct ahc_softc **)host->hostdata) = ahc; | |
1075 | ahc_lock(ahc, &s); | |
1da177e4 LT |
1076 | ahc->platform_data->host = host; |
1077 | host->can_queue = AHC_MAX_QUEUE; | |
1078 | host->cmd_per_lun = 2; | |
1079 | /* XXX No way to communicate the ID for multiple channels */ | |
1080 | host->this_id = ahc->our_id; | |
1081 | host->irq = ahc->platform_data->irq; | |
1082 | host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; | |
1083 | host->max_lun = AHC_NUM_LUNS; | |
1084 | host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; | |
1085 | host->sg_tablesize = AHC_NSEG; | |
2a40342e | 1086 | ahc_set_unit(ahc, ahc_linux_unit++); |
1da177e4 LT |
1087 | sprintf(buf, "scsi%d", host->host_no); |
1088 | new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); | |
1089 | if (new_name != NULL) { | |
1090 | strcpy(new_name, buf); | |
1091 | ahc_set_name(ahc, new_name); | |
1092 | } | |
1093 | host->unique_id = ahc->unit; | |
1da177e4 | 1094 | ahc_linux_initialize_scsi_bus(ahc); |
1da177e4 | 1095 | ahc_intr_enable(ahc, TRUE); |
1da177e4 LT |
1096 | ahc_unlock(ahc, &s); |
1097 | ||
92d161c3 JB |
1098 | host->transportt = ahc_linux_transport_template; |
1099 | ||
1da177e4 LT |
1100 | scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */ |
1101 | scsi_scan_host(host); | |
1da177e4 LT |
1102 | return (0); |
1103 | } | |
1104 | ||
1da177e4 LT |
1105 | /* |
1106 | * Place the SCSI bus into a known state by either resetting it, | |
1107 | * or forcing transfer negotiations on the next command to any | |
1108 | * target. | |
1109 | */ | |
1110 | void | |
1111 | ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) | |
1112 | { | |
1113 | int i; | |
1114 | int numtarg; | |
1115 | ||
1116 | i = 0; | |
1117 | numtarg = 0; | |
1118 | ||
1119 | if (aic7xxx_no_reset != 0) | |
1120 | ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); | |
1121 | ||
1122 | if ((ahc->flags & AHC_RESET_BUS_A) != 0) | |
1123 | ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); | |
1124 | else | |
1125 | numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; | |
1126 | ||
1127 | if ((ahc->features & AHC_TWIN) != 0) { | |
1128 | ||
1129 | if ((ahc->flags & AHC_RESET_BUS_B) != 0) { | |
1130 | ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); | |
1131 | } else { | |
1132 | if (numtarg == 0) | |
1133 | i = 8; | |
1134 | numtarg += 8; | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | /* | |
1139 | * Force negotiation to async for all targets that | |
1140 | * will not see an initial bus reset. | |
1141 | */ | |
1142 | for (; i < numtarg; i++) { | |
1143 | struct ahc_devinfo devinfo; | |
1144 | struct ahc_initiator_tinfo *tinfo; | |
1145 | struct ahc_tmode_tstate *tstate; | |
1146 | u_int our_id; | |
1147 | u_int target_id; | |
1148 | char channel; | |
1149 | ||
1150 | channel = 'A'; | |
1151 | our_id = ahc->our_id; | |
1152 | target_id = i; | |
1153 | if (i > 7 && (ahc->features & AHC_TWIN) != 0) { | |
1154 | channel = 'B'; | |
1155 | our_id = ahc->our_id_b; | |
1156 | target_id = i % 8; | |
1157 | } | |
1158 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, | |
1159 | target_id, &tstate); | |
1160 | ahc_compile_devinfo(&devinfo, our_id, target_id, | |
1161 | CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); | |
1162 | ahc_update_neg_request(ahc, &devinfo, tstate, | |
1163 | tinfo, AHC_NEG_ALWAYS); | |
1164 | } | |
1165 | /* Give the bus some time to recover */ | |
1166 | if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { | |
1167 | ahc_linux_freeze_simq(ahc); | |
1168 | init_timer(&ahc->platform_data->reset_timer); | |
1169 | ahc->platform_data->reset_timer.data = (u_long)ahc; | |
1170 | ahc->platform_data->reset_timer.expires = | |
1171 | jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000; | |
1172 | ahc->platform_data->reset_timer.function = | |
1173 | ahc_linux_release_simq; | |
1174 | add_timer(&ahc->platform_data->reset_timer); | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | int | |
1179 | ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) | |
1180 | { | |
1181 | ||
1182 | ahc->platform_data = | |
1183 | malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); | |
1184 | if (ahc->platform_data == NULL) | |
1185 | return (ENOMEM); | |
1186 | memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); | |
1da177e4 | 1187 | ahc->platform_data->irq = AHC_LINUX_NOIRQ; |
1da177e4 | 1188 | ahc_lockinit(ahc); |
1da177e4 | 1189 | init_MUTEX_LOCKED(&ahc->platform_data->eh_sem); |
1da177e4 LT |
1190 | ahc->seltime = (aic7xxx_seltime & 0x3) << 4; |
1191 | ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; | |
1192 | if (aic7xxx_pci_parity == 0) | |
1193 | ahc->flags |= AHC_DISABLE_PCI_PERR; | |
1194 | ||
1195 | return (0); | |
1196 | } | |
1197 | ||
1198 | void | |
1199 | ahc_platform_free(struct ahc_softc *ahc) | |
1200 | { | |
b1abb4d6 | 1201 | struct scsi_target *starget; |
1da177e4 LT |
1202 | int i, j; |
1203 | ||
1204 | if (ahc->platform_data != NULL) { | |
1da177e4 LT |
1205 | /* destroy all of the device and target objects */ |
1206 | for (i = 0; i < AHC_NUM_TARGETS; i++) { | |
b1abb4d6 JB |
1207 | starget = ahc->platform_data->starget[i]; |
1208 | if (starget != NULL) { | |
1da177e4 | 1209 | for (j = 0; j < AHC_NUM_LUNS; j++) { |
b1abb4d6 JB |
1210 | struct ahc_linux_target *targ = |
1211 | scsi_transport_target_data(starget); | |
1da177e4 | 1212 | |
b1abb4d6 | 1213 | if (targ->sdev[j] == NULL) |
1da177e4 | 1214 | continue; |
b1abb4d6 | 1215 | targ->sdev[j] = NULL; |
1da177e4 | 1216 | } |
b1abb4d6 | 1217 | ahc->platform_data->starget[i] = NULL; |
1da177e4 LT |
1218 | } |
1219 | } | |
1220 | ||
1221 | if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) | |
1222 | free_irq(ahc->platform_data->irq, ahc); | |
1223 | if (ahc->tag == BUS_SPACE_PIO | |
1224 | && ahc->bsh.ioport != 0) | |
1225 | release_region(ahc->bsh.ioport, 256); | |
1226 | if (ahc->tag == BUS_SPACE_MEMIO | |
1227 | && ahc->bsh.maddr != NULL) { | |
1228 | iounmap(ahc->bsh.maddr); | |
1229 | release_mem_region(ahc->platform_data->mem_busaddr, | |
1230 | 0x1000); | |
1231 | } | |
dedd8310 | 1232 | |
97af50f6 JB |
1233 | if (ahc->platform_data->host) |
1234 | scsi_host_put(ahc->platform_data->host); | |
1235 | ||
1da177e4 LT |
1236 | free(ahc->platform_data, M_DEVBUF); |
1237 | } | |
1238 | } | |
1239 | ||
1240 | void | |
1241 | ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) | |
1242 | { | |
1243 | ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), | |
1244 | SCB_GET_CHANNEL(ahc, scb), | |
1245 | SCB_GET_LUN(scb), SCB_LIST_NULL, | |
1246 | ROLE_UNKNOWN, CAM_REQUEUE_REQ); | |
1247 | } | |
1248 | ||
1249 | void | |
1250 | ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, | |
1251 | ahc_queue_alg alg) | |
1252 | { | |
b1abb4d6 JB |
1253 | struct scsi_target *starget; |
1254 | struct ahc_linux_target *targ; | |
1da177e4 | 1255 | struct ahc_linux_device *dev; |
b1abb4d6 JB |
1256 | struct scsi_device *sdev; |
1257 | u_int target_offset; | |
1da177e4 LT |
1258 | int was_queuing; |
1259 | int now_queuing; | |
1260 | ||
b1abb4d6 JB |
1261 | target_offset = devinfo->target; |
1262 | if (devinfo->channel != 'A') | |
1263 | target_offset += 8; | |
1264 | starget = ahc->platform_data->starget[target_offset]; | |
1265 | targ = scsi_transport_target_data(starget); | |
1266 | BUG_ON(targ == NULL); | |
1267 | sdev = targ->sdev[devinfo->lun]; | |
1268 | if (sdev == NULL) | |
1da177e4 | 1269 | return; |
b1abb4d6 JB |
1270 | dev = scsi_transport_device_data(sdev); |
1271 | ||
1da177e4 LT |
1272 | was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); |
1273 | switch (alg) { | |
1274 | default: | |
1275 | case AHC_QUEUE_NONE: | |
1276 | now_queuing = 0; | |
1277 | break; | |
1278 | case AHC_QUEUE_BASIC: | |
1279 | now_queuing = AHC_DEV_Q_BASIC; | |
1280 | break; | |
1281 | case AHC_QUEUE_TAGGED: | |
1282 | now_queuing = AHC_DEV_Q_TAGGED; | |
1283 | break; | |
1284 | } | |
1285 | if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 | |
1286 | && (was_queuing != now_queuing) | |
1287 | && (dev->active != 0)) { | |
1288 | dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; | |
1289 | dev->qfrozen++; | |
1290 | } | |
1291 | ||
1292 | dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); | |
1293 | if (now_queuing) { | |
1294 | u_int usertags; | |
1295 | ||
1296 | usertags = ahc_linux_user_tagdepth(ahc, devinfo); | |
1297 | if (!was_queuing) { | |
1298 | /* | |
1299 | * Start out agressively and allow our | |
1300 | * dynamic queue depth algorithm to take | |
1301 | * care of the rest. | |
1302 | */ | |
1303 | dev->maxtags = usertags; | |
1304 | dev->openings = dev->maxtags - dev->active; | |
1305 | } | |
1306 | if (dev->maxtags == 0) { | |
1307 | /* | |
1308 | * Queueing is disabled by the user. | |
1309 | */ | |
1310 | dev->openings = 1; | |
1311 | } else if (alg == AHC_QUEUE_TAGGED) { | |
1312 | dev->flags |= AHC_DEV_Q_TAGGED; | |
1313 | if (aic7xxx_periodic_otag != 0) | |
1314 | dev->flags |= AHC_DEV_PERIODIC_OTAG; | |
1315 | } else | |
1316 | dev->flags |= AHC_DEV_Q_BASIC; | |
1317 | } else { | |
1318 | /* We can only have one opening. */ | |
1319 | dev->maxtags = 0; | |
1320 | dev->openings = 1 - dev->active; | |
1321 | } | |
b1abb4d6 JB |
1322 | switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { |
1323 | case AHC_DEV_Q_BASIC: | |
fdd0edf2 JB |
1324 | scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); |
1325 | scsi_activate_tcq(sdev, dev->openings + dev->active); | |
b1abb4d6 JB |
1326 | break; |
1327 | case AHC_DEV_Q_TAGGED: | |
fdd0edf2 JB |
1328 | scsi_set_tag_type(sdev, MSG_ORDERED_TAG); |
1329 | scsi_activate_tcq(sdev, dev->openings + dev->active); | |
b1abb4d6 JB |
1330 | break; |
1331 | default: | |
1332 | /* | |
1333 | * We allow the OS to queue 2 untagged transactions to | |
1334 | * us at any time even though we can only execute them | |
1335 | * serially on the controller/device. This should | |
1336 | * remove some latency. | |
1337 | */ | |
fdd0edf2 | 1338 | scsi_deactivate_tcq(sdev, 2); |
b1abb4d6 | 1339 | break; |
1da177e4 | 1340 | } |
1da177e4 LT |
1341 | } |
1342 | ||
1343 | int | |
1344 | ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, | |
1345 | int lun, u_int tag, role_t role, uint32_t status) | |
1346 | { | |
e4e360c3 | 1347 | return 0; |
1da177e4 LT |
1348 | } |
1349 | ||
cb624029 JB |
1350 | static u_int |
1351 | ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) | |
1da177e4 | 1352 | { |
cb624029 JB |
1353 | static int warned_user; |
1354 | u_int tags; | |
1da177e4 | 1355 | |
cb624029 JB |
1356 | tags = 0; |
1357 | if ((ahc->user_discenable & devinfo->target_mask) != 0) { | |
1358 | if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) { | |
1359 | if (warned_user == 0) { | |
1da177e4 | 1360 | |
cb624029 JB |
1361 | printf(KERN_WARNING |
1362 | "aic7xxx: WARNING: Insufficient tag_info instances\n" | |
1363 | "aic7xxx: for installed controllers. Using defaults\n" | |
1364 | "aic7xxx: Please update the aic7xxx_tag_info array in\n" | |
1365 | "aic7xxx: the aic7xxx_osm..c source file.\n"); | |
1366 | warned_user++; | |
1367 | } | |
1368 | tags = AHC_MAX_QUEUE; | |
1369 | } else { | |
1370 | adapter_tag_info_t *tag_info; | |
1da177e4 | 1371 | |
cb624029 JB |
1372 | tag_info = &aic7xxx_tag_info[ahc->unit]; |
1373 | tags = tag_info->tag_commands[devinfo->target_offset]; | |
1374 | if (tags > AHC_MAX_QUEUE) | |
1375 | tags = AHC_MAX_QUEUE; | |
1376 | } | |
1da177e4 | 1377 | } |
cb624029 | 1378 | return (tags); |
1da177e4 LT |
1379 | } |
1380 | ||
cb624029 JB |
1381 | /* |
1382 | * Determines the queue depth for a given device. | |
1383 | */ | |
1da177e4 | 1384 | static void |
b1abb4d6 | 1385 | ahc_linux_device_queue_depth(struct scsi_device *sdev) |
1da177e4 | 1386 | { |
cb624029 JB |
1387 | struct ahc_devinfo devinfo; |
1388 | u_int tags; | |
b1abb4d6 | 1389 | struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); |
1da177e4 | 1390 | |
cb624029 | 1391 | ahc_compile_devinfo(&devinfo, |
b1abb4d6 | 1392 | sdev->sdev_target->channel == 0 |
cb624029 | 1393 | ? ahc->our_id : ahc->our_id_b, |
b1abb4d6 JB |
1394 | sdev->sdev_target->id, sdev->lun, |
1395 | sdev->sdev_target->channel == 0 ? 'A' : 'B', | |
cb624029 JB |
1396 | ROLE_INITIATOR); |
1397 | tags = ahc_linux_user_tagdepth(ahc, &devinfo); | |
b1abb4d6 | 1398 | if (tags != 0 && sdev->tagged_supported != 0) { |
1da177e4 | 1399 | |
cb624029 JB |
1400 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED); |
1401 | ahc_print_devinfo(ahc, &devinfo); | |
1402 | printf("Tagged Queuing enabled. Depth %d\n", tags); | |
1da177e4 | 1403 | } else { |
cb624029 | 1404 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE); |
1da177e4 LT |
1405 | } |
1406 | } | |
1407 | ||
e4e360c3 JB |
1408 | static int |
1409 | ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, | |
1410 | struct scsi_cmnd *cmd) | |
1da177e4 | 1411 | { |
cb624029 JB |
1412 | struct scb *scb; |
1413 | struct hardware_scb *hscb; | |
1414 | struct ahc_initiator_tinfo *tinfo; | |
1415 | struct ahc_tmode_tstate *tstate; | |
1416 | uint16_t mask; | |
e4e360c3 | 1417 | struct scb_tailq *untagged_q = NULL; |
1da177e4 | 1418 | |
e4e360c3 JB |
1419 | /* |
1420 | * Schedule us to run later. The only reason we are not | |
1421 | * running is because the whole controller Q is frozen. | |
1422 | */ | |
1423 | if (ahc->platform_data->qfrozen != 0) | |
1424 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 1425 | |
e4e360c3 JB |
1426 | /* |
1427 | * We only allow one untagged transaction | |
1428 | * per target in the initiator role unless | |
1429 | * we are storing a full busy target *lun* | |
1430 | * table in SCB space. | |
1431 | */ | |
1432 | if (!blk_rq_tagged(cmd->request) | |
1433 | && (ahc->features & AHC_SCB_BTT) == 0) { | |
1434 | int target_offset; | |
1da177e4 | 1435 | |
e4e360c3 JB |
1436 | target_offset = cmd->device->id + cmd->device->channel * 8; |
1437 | untagged_q = &(ahc->untagged_queues[target_offset]); | |
1438 | if (!TAILQ_EMPTY(untagged_q)) | |
1439 | /* if we're already executing an untagged command | |
1440 | * we're busy to another */ | |
1441 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1442 | } | |
1443 | ||
1444 | /* | |
1445 | * Get an scb to use. | |
1446 | */ | |
8eb37942 CH |
1447 | scb = ahc_get_scb(ahc); |
1448 | if (!scb) | |
1449 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 1450 | |
e4e360c3 JB |
1451 | scb->io_ctx = cmd; |
1452 | scb->platform_data->dev = dev; | |
1453 | hscb = scb->hscb; | |
1454 | cmd->host_scribble = (char *)scb; | |
1da177e4 | 1455 | |
e4e360c3 JB |
1456 | /* |
1457 | * Fill out basics of the HSCB. | |
1458 | */ | |
1459 | hscb->control = 0; | |
1460 | hscb->scsiid = BUILD_SCSIID(ahc, cmd); | |
1461 | hscb->lun = cmd->device->lun; | |
1462 | mask = SCB_GET_TARGET_MASK(ahc, scb); | |
1463 | tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), | |
1464 | SCB_GET_OUR_ID(scb), | |
1465 | SCB_GET_TARGET(ahc, scb), &tstate); | |
1466 | hscb->scsirate = tinfo->scsirate; | |
1467 | hscb->scsioffset = tinfo->curr.offset; | |
1468 | if ((tstate->ultraenb & mask) != 0) | |
1469 | hscb->control |= ULTRAENB; | |
1470 | ||
1471 | if ((ahc->user_discenable & mask) != 0) | |
1472 | hscb->control |= DISCENB; | |
1473 | ||
1474 | if ((tstate->auto_negotiate & mask) != 0) { | |
1475 | scb->flags |= SCB_AUTO_NEGOTIATE; | |
1476 | scb->hscb->control |= MK_MESSAGE; | |
1477 | } | |
1478 | ||
1479 | if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { | |
e4e360c3 JB |
1480 | int msg_bytes; |
1481 | uint8_t tag_msgs[2]; | |
1482 | ||
1483 | msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); | |
1484 | if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { | |
1485 | hscb->control |= tag_msgs[0]; | |
1486 | if (tag_msgs[0] == MSG_ORDERED_TASK) | |
cb624029 | 1487 | dev->commands_since_idle_or_otag = 0; |
dedd8310 CH |
1488 | } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH |
1489 | && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { | |
e4e360c3 JB |
1490 | hscb->control |= MSG_ORDERED_TASK; |
1491 | dev->commands_since_idle_or_otag = 0; | |
cb624029 | 1492 | } else { |
e4e360c3 | 1493 | hscb->control |= MSG_SIMPLE_TASK; |
cb624029 | 1494 | } |
e4e360c3 | 1495 | } |
1da177e4 | 1496 | |
e4e360c3 JB |
1497 | hscb->cdb_len = cmd->cmd_len; |
1498 | if (hscb->cdb_len <= 12) { | |
1499 | memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); | |
1500 | } else { | |
1501 | memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); | |
1502 | scb->flags |= SCB_CDB32_PTR; | |
1503 | } | |
1da177e4 | 1504 | |
e4e360c3 JB |
1505 | scb->platform_data->xfer_len = 0; |
1506 | ahc_set_residual(scb, 0); | |
1507 | ahc_set_sense_residual(scb, 0); | |
1508 | scb->sg_count = 0; | |
1509 | if (cmd->use_sg != 0) { | |
1510 | struct ahc_dma_seg *sg; | |
1511 | struct scatterlist *cur_seg; | |
1512 | struct scatterlist *end_seg; | |
1513 | int nseg; | |
1514 | ||
1515 | cur_seg = (struct scatterlist *)cmd->request_buffer; | |
1516 | nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg, | |
1517 | cmd->sc_data_direction); | |
1518 | end_seg = cur_seg + nseg; | |
1519 | /* Copy the segments into the SG list. */ | |
1520 | sg = scb->sg_list; | |
1521 | /* | |
1522 | * The sg_count may be larger than nseg if | |
1523 | * a transfer crosses a 32bit page. | |
1524 | */ | |
1525 | while (cur_seg < end_seg) { | |
1da177e4 | 1526 | dma_addr_t addr; |
e4e360c3 JB |
1527 | bus_size_t len; |
1528 | int consumed; | |
1529 | ||
1530 | addr = sg_dma_address(cur_seg); | |
1531 | len = sg_dma_len(cur_seg); | |
1532 | consumed = ahc_linux_map_seg(ahc, scb, | |
1533 | sg, addr, len); | |
1534 | sg += consumed; | |
1535 | scb->sg_count += consumed; | |
1536 | cur_seg++; | |
1da177e4 | 1537 | } |
e4e360c3 JB |
1538 | sg--; |
1539 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); | |
1da177e4 | 1540 | |
e4e360c3 JB |
1541 | /* |
1542 | * Reset the sg list pointer. | |
1543 | */ | |
1544 | scb->hscb->sgptr = | |
1545 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); | |
1546 | ||
1547 | /* | |
1548 | * Copy the first SG into the "current" | |
1549 | * data pointer area. | |
1550 | */ | |
1551 | scb->hscb->dataptr = scb->sg_list->addr; | |
1552 | scb->hscb->datacnt = scb->sg_list->len; | |
1553 | } else if (cmd->request_bufflen != 0) { | |
1554 | struct ahc_dma_seg *sg; | |
1555 | dma_addr_t addr; | |
1556 | ||
1557 | sg = scb->sg_list; | |
1558 | addr = pci_map_single(ahc->dev_softc, | |
1559 | cmd->request_buffer, | |
1560 | cmd->request_bufflen, | |
1561 | cmd->sc_data_direction); | |
1562 | scb->platform_data->buf_busaddr = addr; | |
1563 | scb->sg_count = ahc_linux_map_seg(ahc, scb, | |
1564 | sg, addr, | |
1565 | cmd->request_bufflen); | |
1566 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); | |
1da177e4 LT |
1567 | |
1568 | /* | |
e4e360c3 | 1569 | * Reset the sg list pointer. |
1da177e4 | 1570 | */ |
e4e360c3 JB |
1571 | scb->hscb->sgptr = |
1572 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); | |
1573 | ||
1574 | /* | |
1575 | * Copy the first SG into the "current" | |
1576 | * data pointer area. | |
1577 | */ | |
1578 | scb->hscb->dataptr = sg->addr; | |
1579 | scb->hscb->datacnt = sg->len; | |
1580 | } else { | |
1581 | scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); | |
1582 | scb->hscb->dataptr = 0; | |
1583 | scb->hscb->datacnt = 0; | |
1584 | scb->sg_count = 0; | |
1585 | } | |
1586 | ||
1587 | LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); | |
1588 | dev->openings--; | |
1589 | dev->active++; | |
1590 | dev->commands_issued++; | |
1591 | if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) | |
1592 | dev->commands_since_idle_or_otag++; | |
1593 | ||
1594 | scb->flags |= SCB_ACTIVE; | |
1595 | if (untagged_q) { | |
1596 | TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); | |
1597 | scb->flags |= SCB_UNTAGGEDQ; | |
1da177e4 | 1598 | } |
e4e360c3 JB |
1599 | ahc_queue_scb(ahc, scb); |
1600 | return 0; | |
1da177e4 LT |
1601 | } |
1602 | ||
1603 | /* | |
1604 | * SCSI controller interrupt handler. | |
1605 | */ | |
1606 | irqreturn_t | |
1607 | ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs) | |
1608 | { | |
1609 | struct ahc_softc *ahc; | |
1610 | u_long flags; | |
1611 | int ours; | |
1612 | ||
1613 | ahc = (struct ahc_softc *) dev_id; | |
1614 | ahc_lock(ahc, &flags); | |
1615 | ours = ahc_intr(ahc); | |
1da177e4 LT |
1616 | ahc_unlock(ahc, &flags); |
1617 | return IRQ_RETVAL(ours); | |
1618 | } | |
1619 | ||
1620 | void | |
1621 | ahc_platform_flushwork(struct ahc_softc *ahc) | |
1622 | { | |
1623 | ||
1da177e4 LT |
1624 | } |
1625 | ||
1da177e4 LT |
1626 | void |
1627 | ahc_send_async(struct ahc_softc *ahc, char channel, | |
1628 | u_int target, u_int lun, ac_code code, void *arg) | |
1629 | { | |
1630 | switch (code) { | |
1631 | case AC_TRANSFER_NEG: | |
1632 | { | |
1633 | char buf[80]; | |
b1abb4d6 | 1634 | struct scsi_target *starget; |
1da177e4 LT |
1635 | struct ahc_linux_target *targ; |
1636 | struct info_str info; | |
1637 | struct ahc_initiator_tinfo *tinfo; | |
1638 | struct ahc_tmode_tstate *tstate; | |
1639 | int target_offset; | |
b1abb4d6 JB |
1640 | unsigned int target_ppr_options; |
1641 | ||
1642 | BUG_ON(target == CAM_TARGET_WILDCARD); | |
1da177e4 LT |
1643 | |
1644 | info.buffer = buf; | |
1645 | info.length = sizeof(buf); | |
1646 | info.offset = 0; | |
1647 | info.pos = 0; | |
1648 | tinfo = ahc_fetch_transinfo(ahc, channel, | |
1649 | channel == 'A' ? ahc->our_id | |
1650 | : ahc->our_id_b, | |
1651 | target, &tstate); | |
1652 | ||
1653 | /* | |
1654 | * Don't bother reporting results while | |
1655 | * negotiations are still pending. | |
1656 | */ | |
1657 | if (tinfo->curr.period != tinfo->goal.period | |
1658 | || tinfo->curr.width != tinfo->goal.width | |
1659 | || tinfo->curr.offset != tinfo->goal.offset | |
1660 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options) | |
1661 | if (bootverbose == 0) | |
1662 | break; | |
1663 | ||
1664 | /* | |
1665 | * Don't bother reporting results that | |
1666 | * are identical to those last reported. | |
1667 | */ | |
1668 | target_offset = target; | |
1669 | if (channel == 'B') | |
1670 | target_offset += 8; | |
b1abb4d6 | 1671 | starget = ahc->platform_data->starget[target_offset]; |
fc789a93 | 1672 | if (starget == NULL) |
1da177e4 | 1673 | break; |
fc789a93 | 1674 | targ = scsi_transport_target_data(starget); |
b1abb4d6 JB |
1675 | |
1676 | target_ppr_options = | |
1677 | (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) | |
1678 | + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) | |
1679 | + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); | |
1680 | ||
1681 | if (tinfo->curr.period == spi_period(starget) | |
1682 | && tinfo->curr.width == spi_width(starget) | |
1683 | && tinfo->curr.offset == spi_offset(starget) | |
1684 | && tinfo->curr.ppr_options == target_ppr_options) | |
1da177e4 LT |
1685 | if (bootverbose == 0) |
1686 | break; | |
1687 | ||
b1abb4d6 JB |
1688 | spi_period(starget) = tinfo->curr.period; |
1689 | spi_width(starget) = tinfo->curr.width; | |
1690 | spi_offset(starget) = tinfo->curr.offset; | |
f7ff898a JB |
1691 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; |
1692 | spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; | |
1693 | spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; | |
b1abb4d6 | 1694 | spi_display_xfer_agreement(starget); |
1da177e4 LT |
1695 | break; |
1696 | } | |
1697 | case AC_SENT_BDR: | |
1698 | { | |
1da177e4 LT |
1699 | WARN_ON(lun != CAM_LUN_WILDCARD); |
1700 | scsi_report_device_reset(ahc->platform_data->host, | |
1701 | channel - 'A', target); | |
1da177e4 LT |
1702 | break; |
1703 | } | |
1704 | case AC_BUS_RESET: | |
1705 | if (ahc->platform_data->host != NULL) { | |
1706 | scsi_report_bus_reset(ahc->platform_data->host, | |
1707 | channel - 'A'); | |
1708 | } | |
1709 | break; | |
1710 | default: | |
1711 | panic("ahc_send_async: Unexpected async event"); | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | /* | |
1716 | * Calls the higher level scsi done function and frees the scb. | |
1717 | */ | |
1718 | void | |
1719 | ahc_done(struct ahc_softc *ahc, struct scb *scb) | |
1720 | { | |
013791ee | 1721 | struct scsi_cmnd *cmd; |
1da177e4 LT |
1722 | struct ahc_linux_device *dev; |
1723 | ||
1724 | LIST_REMOVE(scb, pending_links); | |
1725 | if ((scb->flags & SCB_UNTAGGEDQ) != 0) { | |
1726 | struct scb_tailq *untagged_q; | |
1727 | int target_offset; | |
1728 | ||
1729 | target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); | |
1730 | untagged_q = &(ahc->untagged_queues[target_offset]); | |
1731 | TAILQ_REMOVE(untagged_q, scb, links.tqe); | |
e4e360c3 | 1732 | BUG_ON(!TAILQ_EMPTY(untagged_q)); |
1da177e4 LT |
1733 | } |
1734 | ||
1735 | if ((scb->flags & SCB_ACTIVE) == 0) { | |
1736 | printf("SCB %d done'd twice\n", scb->hscb->tag); | |
1737 | ahc_dump_card_state(ahc); | |
1738 | panic("Stopping for safety"); | |
1739 | } | |
1740 | cmd = scb->io_ctx; | |
1741 | dev = scb->platform_data->dev; | |
1742 | dev->active--; | |
1743 | dev->openings++; | |
1744 | if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { | |
1745 | cmd->result &= ~(CAM_DEV_QFRZN << 16); | |
1746 | dev->qfrozen--; | |
1747 | } | |
1748 | ahc_linux_unmap_scb(ahc, scb); | |
1749 | ||
1750 | /* | |
1751 | * Guard against stale sense data. | |
1752 | * The Linux mid-layer assumes that sense | |
1753 | * was retrieved anytime the first byte of | |
1754 | * the sense buffer looks "sane". | |
1755 | */ | |
1756 | cmd->sense_buffer[0] = 0; | |
1757 | if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { | |
1758 | uint32_t amount_xferred; | |
1759 | ||
1760 | amount_xferred = | |
1761 | ahc_get_transfer_length(scb) - ahc_get_residual(scb); | |
1762 | if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { | |
1763 | #ifdef AHC_DEBUG | |
1764 | if ((ahc_debug & AHC_SHOW_MISC) != 0) { | |
1765 | ahc_print_path(ahc, scb); | |
1766 | printf("Set CAM_UNCOR_PARITY\n"); | |
1767 | } | |
1768 | #endif | |
1769 | ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); | |
1770 | #ifdef AHC_REPORT_UNDERFLOWS | |
1771 | /* | |
1772 | * This code is disabled by default as some | |
1773 | * clients of the SCSI system do not properly | |
1774 | * initialize the underflow parameter. This | |
1775 | * results in spurious termination of commands | |
1776 | * that complete as expected (e.g. underflow is | |
1777 | * allowed as command can return variable amounts | |
1778 | * of data. | |
1779 | */ | |
1780 | } else if (amount_xferred < scb->io_ctx->underflow) { | |
1781 | u_int i; | |
1782 | ||
1783 | ahc_print_path(ahc, scb); | |
1784 | printf("CDB:"); | |
1785 | for (i = 0; i < scb->io_ctx->cmd_len; i++) | |
1786 | printf(" 0x%x", scb->io_ctx->cmnd[i]); | |
1787 | printf("\n"); | |
1788 | ahc_print_path(ahc, scb); | |
1789 | printf("Saw underflow (%ld of %ld bytes). " | |
1790 | "Treated as error\n", | |
1791 | ahc_get_residual(scb), | |
1792 | ahc_get_transfer_length(scb)); | |
1793 | ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); | |
1794 | #endif | |
1795 | } else { | |
1796 | ahc_set_transaction_status(scb, CAM_REQ_CMP); | |
1797 | } | |
1798 | } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { | |
b1abb4d6 | 1799 | ahc_linux_handle_scsi_status(ahc, cmd->device, scb); |
1da177e4 | 1800 | } |
1da177e4 LT |
1801 | |
1802 | if (dev->openings == 1 | |
1803 | && ahc_get_transaction_status(scb) == CAM_REQ_CMP | |
1804 | && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) | |
1805 | dev->tag_success_count++; | |
1806 | /* | |
1807 | * Some devices deal with temporary internal resource | |
1808 | * shortages by returning queue full. When the queue | |
1809 | * full occurrs, we throttle back. Slowly try to get | |
1810 | * back to our previous queue depth. | |
1811 | */ | |
1812 | if ((dev->openings + dev->active) < dev->maxtags | |
1813 | && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { | |
1814 | dev->tag_success_count = 0; | |
1815 | dev->openings++; | |
1816 | } | |
1817 | ||
1818 | if (dev->active == 0) | |
1819 | dev->commands_since_idle_or_otag = 0; | |
1820 | ||
1da177e4 LT |
1821 | if ((scb->flags & SCB_RECOVERY_SCB) != 0) { |
1822 | printf("Recovery SCB completes\n"); | |
1823 | if (ahc_get_transaction_status(scb) == CAM_BDR_SENT | |
1824 | || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) | |
1825 | ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); | |
1826 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { | |
1827 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; | |
1828 | up(&ahc->platform_data->eh_sem); | |
1829 | } | |
1830 | } | |
1831 | ||
1832 | ahc_free_scb(ahc, scb); | |
1833 | ahc_linux_queue_cmd_complete(ahc, cmd); | |
1da177e4 LT |
1834 | } |
1835 | ||
1836 | static void | |
1837 | ahc_linux_handle_scsi_status(struct ahc_softc *ahc, | |
b1abb4d6 | 1838 | struct scsi_device *sdev, struct scb *scb) |
1da177e4 LT |
1839 | { |
1840 | struct ahc_devinfo devinfo; | |
b1abb4d6 | 1841 | struct ahc_linux_device *dev = scsi_transport_device_data(sdev); |
1da177e4 LT |
1842 | |
1843 | ahc_compile_devinfo(&devinfo, | |
1844 | ahc->our_id, | |
b1abb4d6 JB |
1845 | sdev->sdev_target->id, sdev->lun, |
1846 | sdev->sdev_target->channel == 0 ? 'A' : 'B', | |
1da177e4 LT |
1847 | ROLE_INITIATOR); |
1848 | ||
1849 | /* | |
1850 | * We don't currently trust the mid-layer to | |
1851 | * properly deal with queue full or busy. So, | |
1852 | * when one occurs, we tell the mid-layer to | |
1853 | * unconditionally requeue the command to us | |
1854 | * so that we can retry it ourselves. We also | |
1855 | * implement our own throttling mechanism so | |
1856 | * we don't clobber the device with too many | |
1857 | * commands. | |
1858 | */ | |
1859 | switch (ahc_get_scsi_status(scb)) { | |
1860 | default: | |
1861 | break; | |
1862 | case SCSI_STATUS_CHECK_COND: | |
1863 | case SCSI_STATUS_CMD_TERMINATED: | |
1864 | { | |
013791ee | 1865 | struct scsi_cmnd *cmd; |
1da177e4 LT |
1866 | |
1867 | /* | |
1868 | * Copy sense information to the OS's cmd | |
1869 | * structure if it is available. | |
1870 | */ | |
1871 | cmd = scb->io_ctx; | |
1872 | if (scb->flags & SCB_SENSE) { | |
1873 | u_int sense_size; | |
1874 | ||
1875 | sense_size = MIN(sizeof(struct scsi_sense_data) | |
1876 | - ahc_get_sense_residual(scb), | |
1877 | sizeof(cmd->sense_buffer)); | |
1878 | memcpy(cmd->sense_buffer, | |
1879 | ahc_get_sense_buf(ahc, scb), sense_size); | |
1880 | if (sense_size < sizeof(cmd->sense_buffer)) | |
1881 | memset(&cmd->sense_buffer[sense_size], 0, | |
1882 | sizeof(cmd->sense_buffer) - sense_size); | |
1883 | cmd->result |= (DRIVER_SENSE << 24); | |
1884 | #ifdef AHC_DEBUG | |
1885 | if (ahc_debug & AHC_SHOW_SENSE) { | |
1886 | int i; | |
1887 | ||
1888 | printf("Copied %d bytes of sense data:", | |
1889 | sense_size); | |
1890 | for (i = 0; i < sense_size; i++) { | |
1891 | if ((i & 0xF) == 0) | |
1892 | printf("\n"); | |
1893 | printf("0x%x ", cmd->sense_buffer[i]); | |
1894 | } | |
1895 | printf("\n"); | |
1896 | } | |
1897 | #endif | |
1898 | } | |
1899 | break; | |
1900 | } | |
1901 | case SCSI_STATUS_QUEUE_FULL: | |
1902 | { | |
1903 | /* | |
1904 | * By the time the core driver has returned this | |
1905 | * command, all other commands that were queued | |
1906 | * to us but not the device have been returned. | |
1907 | * This ensures that dev->active is equal to | |
1908 | * the number of commands actually queued to | |
1909 | * the device. | |
1910 | */ | |
1911 | dev->tag_success_count = 0; | |
1912 | if (dev->active != 0) { | |
1913 | /* | |
1914 | * Drop our opening count to the number | |
1915 | * of commands currently outstanding. | |
1916 | */ | |
1917 | dev->openings = 0; | |
1918 | /* | |
1919 | ahc_print_path(ahc, scb); | |
1920 | printf("Dropping tag count to %d\n", dev->active); | |
1921 | */ | |
1922 | if (dev->active == dev->tags_on_last_queuefull) { | |
1923 | ||
1924 | dev->last_queuefull_same_count++; | |
1925 | /* | |
1926 | * If we repeatedly see a queue full | |
1927 | * at the same queue depth, this | |
1928 | * device has a fixed number of tag | |
1929 | * slots. Lock in this tag depth | |
1930 | * so we stop seeing queue fulls from | |
1931 | * this device. | |
1932 | */ | |
1933 | if (dev->last_queuefull_same_count | |
1934 | == AHC_LOCK_TAGS_COUNT) { | |
1935 | dev->maxtags = dev->active; | |
1936 | ahc_print_path(ahc, scb); | |
1937 | printf("Locking max tag count at %d\n", | |
1938 | dev->active); | |
1939 | } | |
1940 | } else { | |
1941 | dev->tags_on_last_queuefull = dev->active; | |
1942 | dev->last_queuefull_same_count = 0; | |
1943 | } | |
1944 | ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); | |
1945 | ahc_set_scsi_status(scb, SCSI_STATUS_OK); | |
1946 | ahc_platform_set_tags(ahc, &devinfo, | |
1947 | (dev->flags & AHC_DEV_Q_BASIC) | |
1948 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | |
1949 | break; | |
1950 | } | |
1951 | /* | |
1952 | * Drop down to a single opening, and treat this | |
1953 | * as if the target returned BUSY SCSI status. | |
1954 | */ | |
1955 | dev->openings = 1; | |
1956 | ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); | |
1957 | ahc_platform_set_tags(ahc, &devinfo, | |
1958 | (dev->flags & AHC_DEV_Q_BASIC) | |
1959 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | |
1da177e4 LT |
1960 | break; |
1961 | } | |
1962 | } | |
1963 | } | |
1964 | ||
1965 | static void | |
013791ee | 1966 | ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) |
1da177e4 | 1967 | { |
1da177e4 LT |
1968 | /* |
1969 | * Map CAM error codes into Linux Error codes. We | |
1970 | * avoid the conversion so that the DV code has the | |
1971 | * full error information available when making | |
1972 | * state change decisions. | |
1973 | */ | |
cb624029 | 1974 | { |
1da177e4 LT |
1975 | u_int new_status; |
1976 | ||
1977 | switch (ahc_cmd_get_transaction_status(cmd)) { | |
1978 | case CAM_REQ_INPROG: | |
1979 | case CAM_REQ_CMP: | |
1980 | case CAM_SCSI_STATUS_ERROR: | |
1981 | new_status = DID_OK; | |
1982 | break; | |
1983 | case CAM_REQ_ABORTED: | |
1984 | new_status = DID_ABORT; | |
1985 | break; | |
1986 | case CAM_BUSY: | |
1987 | new_status = DID_BUS_BUSY; | |
1988 | break; | |
1989 | case CAM_REQ_INVALID: | |
1990 | case CAM_PATH_INVALID: | |
1991 | new_status = DID_BAD_TARGET; | |
1992 | break; | |
1993 | case CAM_SEL_TIMEOUT: | |
1994 | new_status = DID_NO_CONNECT; | |
1995 | break; | |
1996 | case CAM_SCSI_BUS_RESET: | |
1997 | case CAM_BDR_SENT: | |
1998 | new_status = DID_RESET; | |
1999 | break; | |
2000 | case CAM_UNCOR_PARITY: | |
2001 | new_status = DID_PARITY; | |
2002 | break; | |
2003 | case CAM_CMD_TIMEOUT: | |
2004 | new_status = DID_TIME_OUT; | |
2005 | break; | |
2006 | case CAM_UA_ABORT: | |
2007 | case CAM_REQ_CMP_ERR: | |
2008 | case CAM_AUTOSENSE_FAIL: | |
2009 | case CAM_NO_HBA: | |
2010 | case CAM_DATA_RUN_ERR: | |
2011 | case CAM_UNEXP_BUSFREE: | |
2012 | case CAM_SEQUENCE_FAIL: | |
2013 | case CAM_CCB_LEN_ERR: | |
2014 | case CAM_PROVIDE_FAIL: | |
2015 | case CAM_REQ_TERMIO: | |
2016 | case CAM_UNREC_HBA_ERROR: | |
2017 | case CAM_REQ_TOO_BIG: | |
2018 | new_status = DID_ERROR; | |
2019 | break; | |
2020 | case CAM_REQUEUE_REQ: | |
8e45ebcc | 2021 | new_status = DID_REQUEUE; |
1da177e4 LT |
2022 | break; |
2023 | default: | |
2024 | /* We should never get here */ | |
2025 | new_status = DID_ERROR; | |
2026 | break; | |
2027 | } | |
2028 | ||
2029 | ahc_cmd_set_transaction_status(cmd, new_status); | |
2030 | } | |
2031 | ||
8e45ebcc | 2032 | cmd->scsi_done(cmd); |
1da177e4 LT |
2033 | } |
2034 | ||
1da177e4 LT |
2035 | static void |
2036 | ahc_linux_sem_timeout(u_long arg) | |
2037 | { | |
2038 | struct ahc_softc *ahc; | |
2039 | u_long s; | |
2040 | ||
2041 | ahc = (struct ahc_softc *)arg; | |
2042 | ||
2043 | ahc_lock(ahc, &s); | |
2044 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { | |
2045 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; | |
2046 | up(&ahc->platform_data->eh_sem); | |
2047 | } | |
2048 | ahc_unlock(ahc, &s); | |
2049 | } | |
2050 | ||
2051 | static void | |
2052 | ahc_linux_freeze_simq(struct ahc_softc *ahc) | |
2053 | { | |
2054 | ahc->platform_data->qfrozen++; | |
2055 | if (ahc->platform_data->qfrozen == 1) { | |
2056 | scsi_block_requests(ahc->platform_data->host); | |
2057 | ||
2058 | /* XXX What about Twin channels? */ | |
2059 | ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, | |
2060 | CAM_LUN_WILDCARD, SCB_LIST_NULL, | |
2061 | ROLE_INITIATOR, CAM_REQUEUE_REQ); | |
2062 | } | |
2063 | } | |
2064 | ||
2065 | static void | |
2066 | ahc_linux_release_simq(u_long arg) | |
2067 | { | |
2068 | struct ahc_softc *ahc; | |
2069 | u_long s; | |
2070 | int unblock_reqs; | |
2071 | ||
2072 | ahc = (struct ahc_softc *)arg; | |
2073 | ||
2074 | unblock_reqs = 0; | |
2075 | ahc_lock(ahc, &s); | |
2076 | if (ahc->platform_data->qfrozen > 0) | |
2077 | ahc->platform_data->qfrozen--; | |
2078 | if (ahc->platform_data->qfrozen == 0) | |
2079 | unblock_reqs = 1; | |
1da177e4 LT |
2080 | ahc_unlock(ahc, &s); |
2081 | /* | |
2082 | * There is still a race here. The mid-layer | |
2083 | * should keep its own freeze count and use | |
2084 | * a bottom half handler to run the queues | |
2085 | * so we can unblock with our own lock held. | |
2086 | */ | |
2087 | if (unblock_reqs) | |
2088 | scsi_unblock_requests(ahc->platform_data->host); | |
2089 | } | |
2090 | ||
1da177e4 | 2091 | static int |
013791ee | 2092 | ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) |
1da177e4 LT |
2093 | { |
2094 | struct ahc_softc *ahc; | |
1da177e4 LT |
2095 | struct ahc_linux_device *dev; |
2096 | struct scb *pending_scb; | |
1da177e4 LT |
2097 | u_int saved_scbptr; |
2098 | u_int active_scb_index; | |
2099 | u_int last_phase; | |
2100 | u_int saved_scsiid; | |
2101 | u_int cdb_byte; | |
2102 | int retval; | |
2103 | int was_paused; | |
2104 | int paused; | |
2105 | int wait; | |
2106 | int disconnected; | |
6d5e9fd1 | 2107 | unsigned long flags; |
1da177e4 LT |
2108 | |
2109 | pending_scb = NULL; | |
2110 | paused = FALSE; | |
2111 | wait = FALSE; | |
2112 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
1da177e4 | 2113 | |
017560fc | 2114 | scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", |
1da177e4 LT |
2115 | flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); |
2116 | ||
2117 | printf("CDB:"); | |
2118 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) | |
2119 | printf(" 0x%x", cmd->cmnd[cdb_byte]); | |
2120 | printf("\n"); | |
2121 | ||
6d5e9fd1 | 2122 | ahc_lock(ahc, &flags); |
8fa728a2 | 2123 | |
1da177e4 LT |
2124 | /* |
2125 | * First determine if we currently own this command. | |
2126 | * Start by searching the device queue. If not found | |
2127 | * there, check the pending_scb list. If not found | |
2128 | * at all, and the system wanted us to just abort the | |
2129 | * command, return success. | |
2130 | */ | |
b1abb4d6 | 2131 | dev = scsi_transport_device_data(cmd->device); |
1da177e4 LT |
2132 | |
2133 | if (dev == NULL) { | |
2134 | /* | |
2135 | * No target device for this command exists, | |
2136 | * so we must not still own the command. | |
2137 | */ | |
2138 | printf("%s:%d:%d:%d: Is not an active device\n", | |
2139 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2140 | cmd->device->lun); | |
2141 | retval = SUCCESS; | |
2142 | goto no_cmd; | |
2143 | } | |
2144 | ||
1da177e4 LT |
2145 | if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 |
2146 | && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, | |
2147 | cmd->device->channel + 'A', | |
2148 | cmd->device->lun, | |
2149 | CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { | |
2150 | printf("%s:%d:%d:%d: Command found on untagged queue\n", | |
2151 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2152 | cmd->device->lun); | |
2153 | retval = SUCCESS; | |
2154 | goto done; | |
2155 | } | |
2156 | ||
2157 | /* | |
2158 | * See if we can find a matching cmd in the pending list. | |
2159 | */ | |
2160 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | |
2161 | if (pending_scb->io_ctx == cmd) | |
2162 | break; | |
2163 | } | |
2164 | ||
2165 | if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { | |
2166 | ||
2167 | /* Any SCB for this device will do for a target reset */ | |
2168 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | |
422c0d61 JG |
2169 | if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), |
2170 | scmd_channel(cmd) + 'A', | |
1da177e4 | 2171 | CAM_LUN_WILDCARD, |
dce20067 | 2172 | SCB_LIST_NULL, ROLE_INITIATOR)) |
1da177e4 LT |
2173 | break; |
2174 | } | |
2175 | } | |
2176 | ||
2177 | if (pending_scb == NULL) { | |
017560fc | 2178 | scmd_printk(KERN_INFO, cmd, "Command not found\n"); |
1da177e4 LT |
2179 | goto no_cmd; |
2180 | } | |
2181 | ||
2182 | if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { | |
2183 | /* | |
2184 | * We can't queue two recovery actions using the same SCB | |
2185 | */ | |
2186 | retval = FAILED; | |
2187 | goto done; | |
2188 | } | |
2189 | ||
2190 | /* | |
2191 | * Ensure that the card doesn't do anything | |
2192 | * behind our back and that we didn't "just" miss | |
2193 | * an interrupt that would affect this cmd. | |
2194 | */ | |
2195 | was_paused = ahc_is_paused(ahc); | |
2196 | ahc_pause_and_flushwork(ahc); | |
2197 | paused = TRUE; | |
2198 | ||
2199 | if ((pending_scb->flags & SCB_ACTIVE) == 0) { | |
017560fc | 2200 | scmd_printk(KERN_INFO, cmd, "Command already completed\n"); |
1da177e4 LT |
2201 | goto no_cmd; |
2202 | } | |
2203 | ||
2204 | printf("%s: At time of recovery, card was %spaused\n", | |
2205 | ahc_name(ahc), was_paused ? "" : "not "); | |
2206 | ahc_dump_card_state(ahc); | |
2207 | ||
2208 | disconnected = TRUE; | |
2209 | if (flag == SCB_ABORT) { | |
2210 | if (ahc_search_qinfifo(ahc, cmd->device->id, | |
2211 | cmd->device->channel + 'A', | |
2212 | cmd->device->lun, | |
2213 | pending_scb->hscb->tag, | |
2214 | ROLE_INITIATOR, CAM_REQ_ABORTED, | |
2215 | SEARCH_COMPLETE) > 0) { | |
2216 | printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", | |
2217 | ahc_name(ahc), cmd->device->channel, | |
2218 | cmd->device->id, cmd->device->lun); | |
2219 | retval = SUCCESS; | |
2220 | goto done; | |
2221 | } | |
2222 | } else if (ahc_search_qinfifo(ahc, cmd->device->id, | |
2223 | cmd->device->channel + 'A', | |
2224 | cmd->device->lun, pending_scb->hscb->tag, | |
2225 | ROLE_INITIATOR, /*status*/0, | |
2226 | SEARCH_COUNT) > 0) { | |
2227 | disconnected = FALSE; | |
2228 | } | |
2229 | ||
2230 | if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { | |
2231 | struct scb *bus_scb; | |
2232 | ||
2233 | bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); | |
2234 | if (bus_scb == pending_scb) | |
2235 | disconnected = FALSE; | |
2236 | else if (flag != SCB_ABORT | |
2237 | && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid | |
2238 | && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) | |
2239 | disconnected = FALSE; | |
2240 | } | |
2241 | ||
2242 | /* | |
2243 | * At this point, pending_scb is the scb associated with the | |
2244 | * passed in command. That command is currently active on the | |
2245 | * bus, is in the disconnected state, or we're hoping to find | |
2246 | * a command for the same target active on the bus to abuse to | |
2247 | * send a BDR. Queue the appropriate message based on which of | |
2248 | * these states we are in. | |
2249 | */ | |
2250 | last_phase = ahc_inb(ahc, LASTPHASE); | |
2251 | saved_scbptr = ahc_inb(ahc, SCBPTR); | |
2252 | active_scb_index = ahc_inb(ahc, SCB_TAG); | |
2253 | saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); | |
2254 | if (last_phase != P_BUSFREE | |
2255 | && (pending_scb->hscb->tag == active_scb_index | |
2256 | || (flag == SCB_DEVICE_RESET | |
422c0d61 | 2257 | && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { |
1da177e4 LT |
2258 | |
2259 | /* | |
2260 | * We're active on the bus, so assert ATN | |
2261 | * and hope that the target responds. | |
2262 | */ | |
2263 | pending_scb = ahc_lookup_scb(ahc, active_scb_index); | |
2264 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | |
2265 | ahc_outb(ahc, MSG_OUT, HOST_MSG); | |
2266 | ahc_outb(ahc, SCSISIGO, last_phase|ATNO); | |
017560fc | 2267 | scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); |
1da177e4 LT |
2268 | wait = TRUE; |
2269 | } else if (disconnected) { | |
2270 | ||
2271 | /* | |
2272 | * Actually re-queue this SCB in an attempt | |
2273 | * to select the device before it reconnects. | |
2274 | * In either case (selection or reselection), | |
2275 | * we will now issue the approprate message | |
2276 | * to the timed-out device. | |
2277 | * | |
2278 | * Set the MK_MESSAGE control bit indicating | |
2279 | * that we desire to send a message. We | |
2280 | * also set the disconnected flag since | |
2281 | * in the paging case there is no guarantee | |
2282 | * that our SCB control byte matches the | |
2283 | * version on the card. We don't want the | |
2284 | * sequencer to abort the command thinking | |
2285 | * an unsolicited reselection occurred. | |
2286 | */ | |
2287 | pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; | |
2288 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | |
2289 | ||
2290 | /* | |
2291 | * Remove any cached copy of this SCB in the | |
2292 | * disconnected list in preparation for the | |
2293 | * queuing of our abort SCB. We use the | |
2294 | * same element in the SCB, SCB_NEXT, for | |
2295 | * both the qinfifo and the disconnected list. | |
2296 | */ | |
2297 | ahc_search_disc_list(ahc, cmd->device->id, | |
2298 | cmd->device->channel + 'A', | |
2299 | cmd->device->lun, pending_scb->hscb->tag, | |
2300 | /*stop_on_first*/TRUE, | |
2301 | /*remove*/TRUE, | |
2302 | /*save_state*/FALSE); | |
2303 | ||
2304 | /* | |
2305 | * In the non-paging case, the sequencer will | |
2306 | * never re-reference the in-core SCB. | |
2307 | * To make sure we are notified during | |
2308 | * reslection, set the MK_MESSAGE flag in | |
2309 | * the card's copy of the SCB. | |
2310 | */ | |
2311 | if ((ahc->flags & AHC_PAGESCBS) == 0) { | |
2312 | ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); | |
2313 | ahc_outb(ahc, SCB_CONTROL, | |
2314 | ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); | |
2315 | } | |
2316 | ||
2317 | /* | |
2318 | * Clear out any entries in the QINFIFO first | |
2319 | * so we are the next SCB for this target | |
2320 | * to run. | |
2321 | */ | |
2322 | ahc_search_qinfifo(ahc, cmd->device->id, | |
2323 | cmd->device->channel + 'A', | |
2324 | cmd->device->lun, SCB_LIST_NULL, | |
2325 | ROLE_INITIATOR, CAM_REQUEUE_REQ, | |
2326 | SEARCH_COMPLETE); | |
2327 | ahc_qinfifo_requeue_tail(ahc, pending_scb); | |
2328 | ahc_outb(ahc, SCBPTR, saved_scbptr); | |
2329 | ahc_print_path(ahc, pending_scb); | |
2330 | printf("Device is disconnected, re-queuing SCB\n"); | |
2331 | wait = TRUE; | |
2332 | } else { | |
017560fc | 2333 | scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); |
1da177e4 LT |
2334 | retval = FAILED; |
2335 | goto done; | |
2336 | } | |
2337 | ||
2338 | no_cmd: | |
2339 | /* | |
2340 | * Our assumption is that if we don't have the command, no | |
2341 | * recovery action was required, so we return success. Again, | |
2342 | * the semantics of the mid-layer recovery engine are not | |
2343 | * well defined, so this may change in time. | |
2344 | */ | |
2345 | retval = SUCCESS; | |
2346 | done: | |
2347 | if (paused) | |
2348 | ahc_unpause(ahc); | |
2349 | if (wait) { | |
2350 | struct timer_list timer; | |
2351 | int ret; | |
2352 | ||
2353 | ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE; | |
6d5e9fd1 CH |
2354 | ahc_unlock(ahc, &flags); |
2355 | ||
1da177e4 LT |
2356 | init_timer(&timer); |
2357 | timer.data = (u_long)ahc; | |
2358 | timer.expires = jiffies + (5 * HZ); | |
2359 | timer.function = ahc_linux_sem_timeout; | |
2360 | add_timer(&timer); | |
2361 | printf("Recovery code sleeping\n"); | |
2362 | down(&ahc->platform_data->eh_sem); | |
2363 | printf("Recovery code awake\n"); | |
2364 | ret = del_timer_sync(&timer); | |
2365 | if (ret == 0) { | |
2366 | printf("Timer Expired\n"); | |
2367 | retval = FAILED; | |
2368 | } | |
6d5e9fd1 CH |
2369 | } else |
2370 | ahc_unlock(ahc, &flags); | |
1da177e4 LT |
2371 | return (retval); |
2372 | } | |
2373 | ||
2374 | void | |
2375 | ahc_platform_dump_card_state(struct ahc_softc *ahc) | |
2376 | { | |
1da177e4 LT |
2377 | } |
2378 | ||
fad01ef8 JB |
2379 | static void ahc_linux_set_width(struct scsi_target *starget, int width) |
2380 | { | |
2381 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2382 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2383 | struct ahc_devinfo devinfo; | |
2384 | unsigned long flags; | |
2385 | ||
2386 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2387 | starget->channel + 'A', ROLE_INITIATOR); | |
2388 | ahc_lock(ahc, &flags); | |
2389 | ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); | |
2390 | ahc_unlock(ahc, &flags); | |
2391 | } | |
2392 | ||
92d161c3 JB |
2393 | static void ahc_linux_set_period(struct scsi_target *starget, int period) |
2394 | { | |
2395 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2396 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2397 | struct ahc_tmode_tstate *tstate; | |
2398 | struct ahc_initiator_tinfo *tinfo | |
2399 | = ahc_fetch_transinfo(ahc, | |
2400 | starget->channel + 'A', | |
2401 | shost->this_id, starget->id, &tstate); | |
2402 | struct ahc_devinfo devinfo; | |
597487b9 | 2403 | unsigned int ppr_options = tinfo->goal.ppr_options; |
92d161c3 | 2404 | unsigned long flags; |
597487b9 | 2405 | unsigned long offset = tinfo->goal.offset; |
92d161c3 JB |
2406 | struct ahc_syncrate *syncrate; |
2407 | ||
2408 | if (offset == 0) | |
2409 | offset = MAX_OFFSET; | |
2410 | ||
2bf2c568 JB |
2411 | if (period < 9) |
2412 | period = 9; /* 12.5ns is our minimum */ | |
2413 | if (period == 9) | |
2414 | ppr_options |= MSG_EXT_PPR_DT_REQ; | |
2415 | ||
92d161c3 JB |
2416 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
2417 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 JB |
2418 | |
2419 | /* all PPR requests apart from QAS require wide transfers */ | |
2420 | if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { | |
fad01ef8 JB |
2421 | if (spi_width(starget) == 0) |
2422 | ppr_options &= MSG_EXT_PPR_QAS_REQ; | |
2423 | } | |
2424 | ||
92d161c3 JB |
2425 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
2426 | ahc_lock(ahc, &flags); | |
2427 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, | |
2428 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
2429 | ahc_unlock(ahc, &flags); | |
2430 | } | |
2431 | ||
92d161c3 JB |
2432 | static void ahc_linux_set_offset(struct scsi_target *starget, int offset) |
2433 | { | |
2434 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2435 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2436 | struct ahc_tmode_tstate *tstate; | |
2437 | struct ahc_initiator_tinfo *tinfo | |
2438 | = ahc_fetch_transinfo(ahc, | |
2439 | starget->channel + 'A', | |
2440 | shost->this_id, starget->id, &tstate); | |
2441 | struct ahc_devinfo devinfo; | |
2442 | unsigned int ppr_options = 0; | |
2443 | unsigned int period = 0; | |
2444 | unsigned long flags; | |
2445 | struct ahc_syncrate *syncrate = NULL; | |
2446 | ||
2447 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2448 | starget->channel + 'A', ROLE_INITIATOR); | |
2449 | if (offset != 0) { | |
2450 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); | |
597487b9 JB |
2451 | period = tinfo->goal.period; |
2452 | ppr_options = tinfo->goal.ppr_options; | |
92d161c3 JB |
2453 | } |
2454 | ahc_lock(ahc, &flags); | |
2455 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, | |
2456 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
2457 | ahc_unlock(ahc, &flags); | |
2458 | } | |
2459 | ||
92d161c3 JB |
2460 | static void ahc_linux_set_dt(struct scsi_target *starget, int dt) |
2461 | { | |
2462 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2463 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2464 | struct ahc_tmode_tstate *tstate; | |
2465 | struct ahc_initiator_tinfo *tinfo | |
2466 | = ahc_fetch_transinfo(ahc, | |
2467 | starget->channel + 'A', | |
2468 | shost->this_id, starget->id, &tstate); | |
2469 | struct ahc_devinfo devinfo; | |
597487b9 | 2470 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2471 | & ~MSG_EXT_PPR_DT_REQ; |
597487b9 | 2472 | unsigned int period = tinfo->goal.period; |
84e66ee7 | 2473 | unsigned int width = tinfo->goal.width; |
92d161c3 JB |
2474 | unsigned long flags; |
2475 | struct ahc_syncrate *syncrate; | |
2476 | ||
2bf2c568 | 2477 | if (dt) { |
2bf2c568 | 2478 | ppr_options |= MSG_EXT_PPR_DT_REQ; |
84e66ee7 JB |
2479 | if (!width) |
2480 | ahc_linux_set_width(starget, 1); | |
2481 | } else if (period == 9) | |
2bf2c568 JB |
2482 | period = 10; /* if resetting DT, period must be >= 25ns */ |
2483 | ||
92d161c3 JB |
2484 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
2485 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2486 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); |
92d161c3 | 2487 | ahc_lock(ahc, &flags); |
597487b9 | 2488 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 JB |
2489 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2490 | ahc_unlock(ahc, &flags); | |
2491 | } | |
2492 | ||
ace4e718 JB |
2493 | #if 0 |
2494 | /* FIXME: This code claims to support IU and QAS. However, the actual | |
2495 | * sequencer code and aic7xxx_core have no support for these parameters and | |
2496 | * will get into a bad state if they're negotiated. Do not enable this | |
2497 | * unless you know what you're doing */ | |
92d161c3 JB |
2498 | static void ahc_linux_set_qas(struct scsi_target *starget, int qas) |
2499 | { | |
2500 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2501 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2502 | struct ahc_tmode_tstate *tstate; | |
2503 | struct ahc_initiator_tinfo *tinfo | |
2504 | = ahc_fetch_transinfo(ahc, | |
2505 | starget->channel + 'A', | |
2506 | shost->this_id, starget->id, &tstate); | |
2507 | struct ahc_devinfo devinfo; | |
597487b9 | 2508 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2509 | & ~MSG_EXT_PPR_QAS_REQ; |
597487b9 | 2510 | unsigned int period = tinfo->goal.period; |
92d161c3 JB |
2511 | unsigned long flags; |
2512 | struct ahc_syncrate *syncrate; | |
2513 | ||
2514 | if (qas) | |
2515 | ppr_options |= MSG_EXT_PPR_QAS_REQ; | |
2516 | ||
2517 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2518 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2519 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
92d161c3 | 2520 | ahc_lock(ahc, &flags); |
597487b9 | 2521 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 JB |
2522 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2523 | ahc_unlock(ahc, &flags); | |
2524 | } | |
2525 | ||
92d161c3 JB |
2526 | static void ahc_linux_set_iu(struct scsi_target *starget, int iu) |
2527 | { | |
2528 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2529 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2530 | struct ahc_tmode_tstate *tstate; | |
2531 | struct ahc_initiator_tinfo *tinfo | |
2532 | = ahc_fetch_transinfo(ahc, | |
2533 | starget->channel + 'A', | |
2534 | shost->this_id, starget->id, &tstate); | |
2535 | struct ahc_devinfo devinfo; | |
597487b9 | 2536 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2537 | & ~MSG_EXT_PPR_IU_REQ; |
597487b9 | 2538 | unsigned int period = tinfo->goal.period; |
92d161c3 JB |
2539 | unsigned long flags; |
2540 | struct ahc_syncrate *syncrate; | |
2541 | ||
2542 | if (iu) | |
2543 | ppr_options |= MSG_EXT_PPR_IU_REQ; | |
2544 | ||
2545 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2546 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2547 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
92d161c3 | 2548 | ahc_lock(ahc, &flags); |
597487b9 | 2549 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 JB |
2550 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2551 | ahc_unlock(ahc, &flags); | |
2552 | } | |
ace4e718 | 2553 | #endif |
92d161c3 JB |
2554 | |
2555 | static struct spi_function_template ahc_linux_transport_functions = { | |
92d161c3 JB |
2556 | .set_offset = ahc_linux_set_offset, |
2557 | .show_offset = 1, | |
92d161c3 JB |
2558 | .set_period = ahc_linux_set_period, |
2559 | .show_period = 1, | |
92d161c3 JB |
2560 | .set_width = ahc_linux_set_width, |
2561 | .show_width = 1, | |
92d161c3 JB |
2562 | .set_dt = ahc_linux_set_dt, |
2563 | .show_dt = 1, | |
ace4e718 | 2564 | #if 0 |
92d161c3 JB |
2565 | .set_iu = ahc_linux_set_iu, |
2566 | .show_iu = 1, | |
92d161c3 JB |
2567 | .set_qas = ahc_linux_set_qas, |
2568 | .show_qas = 1, | |
ace4e718 | 2569 | #endif |
92d161c3 JB |
2570 | }; |
2571 | ||
2572 | ||
2573 | ||
1da177e4 LT |
2574 | static int __init |
2575 | ahc_linux_init(void) | |
2576 | { | |
dfd287f6 CH |
2577 | /* |
2578 | * If we've been passed any parameters, process them now. | |
2579 | */ | |
2580 | if (aic7xxx) | |
2581 | aic7xxx_setup(aic7xxx); | |
2582 | ||
2583 | ahc_linux_transport_template = | |
2584 | spi_attach_transport(&ahc_linux_transport_functions); | |
92d161c3 JB |
2585 | if (!ahc_linux_transport_template) |
2586 | return -ENODEV; | |
dfd287f6 | 2587 | |
b1abb4d6 JB |
2588 | scsi_transport_reserve_target(ahc_linux_transport_template, |
2589 | sizeof(struct ahc_linux_target)); | |
2590 | scsi_transport_reserve_device(ahc_linux_transport_template, | |
2591 | sizeof(struct ahc_linux_device)); | |
dfd287f6 | 2592 | |
dfd287f6 CH |
2593 | ahc_linux_pci_init(); |
2594 | ahc_linux_eisa_init(); | |
2595 | return 0; | |
1da177e4 LT |
2596 | } |
2597 | ||
2598 | static void | |
2599 | ahc_linux_exit(void) | |
2600 | { | |
1da177e4 LT |
2601 | ahc_linux_pci_exit(); |
2602 | ahc_linux_eisa_exit(); | |
92d161c3 | 2603 | spi_release_transport(ahc_linux_transport_template); |
1da177e4 LT |
2604 | } |
2605 | ||
2606 | module_init(ahc_linux_init); | |
2607 | module_exit(ahc_linux_exit); |