Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Adaptec AIC7xxx device driver for Linux. | |
3 | * | |
4 | * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $ | |
5 | * | |
6 | * Copyright (c) 1994 John Aycock | |
7 | * The University of Calgary Department of Computer Science. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2, or (at your option) | |
12 | * any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; see the file COPYING. If not, write to | |
21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | * | |
23 | * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F | |
24 | * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA | |
25 | * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide, | |
26 | * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux, | |
27 | * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file | |
28 | * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual, | |
29 | * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the | |
30 | * ANSI SCSI-2 specification (draft 10c), ... | |
31 | * | |
32 | * -------------------------------------------------------------------------- | |
33 | * | |
34 | * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org): | |
35 | * | |
36 | * Substantially modified to include support for wide and twin bus | |
37 | * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes, | |
38 | * SCB paging, and other rework of the code. | |
39 | * | |
40 | * -------------------------------------------------------------------------- | |
41 | * Copyright (c) 1994-2000 Justin T. Gibbs. | |
42 | * Copyright (c) 2000-2001 Adaptec Inc. | |
43 | * All rights reserved. | |
44 | * | |
45 | * Redistribution and use in source and binary forms, with or without | |
46 | * modification, are permitted provided that the following conditions | |
47 | * are met: | |
48 | * 1. Redistributions of source code must retain the above copyright | |
49 | * notice, this list of conditions, and the following disclaimer, | |
50 | * without modification. | |
51 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
52 | * substantially similar to the "NO WARRANTY" disclaimer below | |
53 | * ("Disclaimer") and any redistribution must be conditioned upon | |
54 | * including a substantially similar Disclaimer requirement for further | |
55 | * binary redistribution. | |
56 | * 3. Neither the names of the above-listed copyright holders nor the names | |
57 | * of any contributors may be used to endorse or promote products derived | |
58 | * from this software without specific prior written permission. | |
59 | * | |
60 | * Alternatively, this software may be distributed under the terms of the | |
61 | * GNU General Public License ("GPL") version 2 as published by the Free | |
62 | * Software Foundation. | |
63 | * | |
64 | * NO WARRANTY | |
65 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
66 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
67 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
68 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
69 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
70 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
71 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
72 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
73 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
74 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
75 | * POSSIBILITY OF SUCH DAMAGES. | |
76 | * | |
77 | *--------------------------------------------------------------------------- | |
78 | * | |
79 | * Thanks also go to (in alphabetical order) the following: | |
80 | * | |
81 | * Rory Bolt - Sequencer bug fixes | |
82 | * Jay Estabrook - Initial DEC Alpha support | |
83 | * Doug Ledford - Much needed abort/reset bug fixes | |
84 | * Kai Makisara - DMAing of SCBs | |
85 | * | |
86 | * A Boot time option was also added for not resetting the scsi bus. | |
87 | * | |
88 | * Form: aic7xxx=extended | |
89 | * aic7xxx=no_reset | |
90 | * aic7xxx=verbose | |
91 | * | |
92 | * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97 | |
93 | * | |
94 | * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp | |
95 | */ | |
96 | ||
97 | /* | |
98 | * Further driver modifications made by Doug Ledford <dledford@redhat.com> | |
99 | * | |
100 | * Copyright (c) 1997-1999 Doug Ledford | |
101 | * | |
102 | * These changes are released under the same licensing terms as the FreeBSD | |
103 | * driver written by Justin Gibbs. Please see his Copyright notice above | |
104 | * for the exact terms and conditions covering my changes as well as the | |
105 | * warranty statement. | |
106 | * | |
107 | * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include | |
108 | * but are not limited to: | |
109 | * | |
110 | * 1: Import of the latest FreeBSD sequencer code for this driver | |
111 | * 2: Modification of kernel code to accommodate different sequencer semantics | |
112 | * 3: Extensive changes throughout kernel portion of driver to improve | |
113 | * abort/reset processing and error hanndling | |
114 | * 4: Other work contributed by various people on the Internet | |
115 | * 5: Changes to printk information and verbosity selection code | |
116 | * 6: General reliability related changes, especially in IRQ management | |
117 | * 7: Modifications to the default probe/attach order for supported cards | |
118 | * 8: SMP friendliness has been improved | |
119 | * | |
120 | */ | |
121 | ||
122 | #include "aic7xxx_osm.h" | |
123 | #include "aic7xxx_inline.h" | |
124 | #include <scsi/scsicam.h> | |
92d161c3 | 125 | |
126 | static struct scsi_transport_template *ahc_linux_transport_template = NULL; | |
1da177e4 | 127 | |
1da177e4 | 128 | #include <linux/init.h> /* __setup */ |
1da177e4 LT |
129 | #include <linux/mm.h> /* For fetching system memory size */ |
130 | #include <linux/blkdev.h> /* For block_size() */ | |
131 | #include <linux/delay.h> /* For ssleep/msleep */ | |
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); |
1da177e4 LT |
479 | |
480 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
481 | ||
482 | /* | |
483 | * Save the callback on completion function. | |
484 | */ | |
485 | cmd->scsi_done = scsi_done; | |
486 | ||
1da177e4 LT |
487 | /* |
488 | * Close the race of a command that was in the process of | |
489 | * being queued to us just as our simq was frozen. Let | |
490 | * DV commands through so long as we are only frozen to | |
491 | * perform DV. | |
492 | */ | |
e4e360c3 JB |
493 | if (ahc->platform_data->qfrozen != 0) |
494 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 495 | |
1da177e4 | 496 | cmd->result = CAM_REQ_INPROG << 16; |
e4e360c3 JB |
497 | |
498 | return ahc_linux_run_command(ahc, dev, cmd); | |
1da177e4 LT |
499 | } |
500 | ||
b1abb4d6 JB |
501 | static inline struct scsi_target ** |
502 | ahc_linux_target_in_softc(struct scsi_target *starget) | |
1da177e4 | 503 | { |
b1abb4d6 JB |
504 | struct ahc_softc *ahc = |
505 | *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); | |
fb3089df | 506 | unsigned int target_offset; |
b1abb4d6 JB |
507 | |
508 | target_offset = starget->id; | |
509 | if (starget->channel != 0) | |
510 | target_offset += 8; | |
511 | ||
512 | return &ahc->platform_data->starget[target_offset]; | |
513 | } | |
514 | ||
515 | static int | |
516 | ahc_linux_target_alloc(struct scsi_target *starget) | |
517 | { | |
518 | struct ahc_softc *ahc = | |
519 | *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); | |
520 | struct seeprom_config *sc = ahc->seep_config; | |
fb3089df | 521 | unsigned long flags; |
b1abb4d6 JB |
522 | struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); |
523 | struct ahc_linux_target *targ = scsi_transport_target_data(starget); | |
524 | unsigned short scsirate; | |
525 | struct ahc_devinfo devinfo; | |
526 | struct ahc_initiator_tinfo *tinfo; | |
527 | struct ahc_tmode_tstate *tstate; | |
528 | char channel = starget->channel + 'A'; | |
529 | unsigned int our_id = ahc->our_id; | |
530 | unsigned int target_offset; | |
c7525233 JB |
531 | |
532 | target_offset = starget->id; | |
533 | if (starget->channel != 0) | |
534 | target_offset += 8; | |
b1abb4d6 JB |
535 | |
536 | if (starget->channel) | |
537 | our_id = ahc->our_id_b; | |
1da177e4 | 538 | |
fb3089df | 539 | ahc_lock(ahc, &flags); |
fb3089df | 540 | |
b1abb4d6 | 541 | BUG_ON(*ahc_targp != NULL); |
c7525233 | 542 | |
b1abb4d6 JB |
543 | *ahc_targp = starget; |
544 | memset(targ, 0, sizeof(*targ)); | |
c7525233 | 545 | |
b1abb4d6 | 546 | if (sc) { |
12021fff JB |
547 | int maxsync = AHC_SYNCRATE_DT; |
548 | int ultra = 0; | |
549 | int flags = sc->device_flags[target_offset]; | |
550 | ||
551 | if (ahc->flags & AHC_NEWEEPROM_FMT) { | |
552 | if (flags & CFSYNCHISULTRA) | |
553 | ultra = 1; | |
554 | } else if (flags & CFULTRAEN) | |
555 | ultra = 1; | |
556 | /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 | |
557 | * change it to ultra=0, CFXFER = 0 */ | |
558 | if(ultra && (flags & CFXFER) == 0x04) { | |
559 | ultra = 0; | |
560 | flags &= ~CFXFER; | |
561 | } | |
562 | ||
b1abb4d6 | 563 | if ((ahc->features & AHC_ULTRA2) != 0) { |
12021fff | 564 | scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); |
b1abb4d6 | 565 | } else { |
12021fff JB |
566 | scsirate = (flags & CFXFER) << 4; |
567 | maxsync = ultra ? AHC_SYNCRATE_ULTRA : | |
568 | AHC_SYNCRATE_FAST; | |
c7525233 | 569 | } |
12021fff JB |
570 | spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; |
571 | if (!(flags & CFSYNCH)) | |
572 | spi_max_offset(starget) = 0; | |
b1abb4d6 | 573 | spi_min_period(starget) = |
12021fff JB |
574 | ahc_find_period(ahc, scsirate, maxsync); |
575 | ||
b1abb4d6 JB |
576 | tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, |
577 | starget->id, &tstate); | |
c7525233 | 578 | } |
b1abb4d6 JB |
579 | ahc_compile_devinfo(&devinfo, our_id, starget->id, |
580 | CAM_LUN_WILDCARD, channel, | |
581 | ROLE_INITIATOR); | |
582 | ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, | |
583 | AHC_TRANS_GOAL, /*paused*/FALSE); | |
584 | ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, | |
585 | AHC_TRANS_GOAL, /*paused*/FALSE); | |
fb3089df | 586 | ahc_unlock(ahc, &flags); |
b1abb4d6 JB |
587 | |
588 | return 0; | |
589 | } | |
590 | ||
591 | static void | |
592 | ahc_linux_target_destroy(struct scsi_target *starget) | |
593 | { | |
594 | struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); | |
595 | ||
596 | *ahc_targp = NULL; | |
597 | } | |
598 | ||
599 | static int | |
600 | ahc_linux_slave_alloc(struct scsi_device *sdev) | |
601 | { | |
602 | struct ahc_softc *ahc = | |
603 | *((struct ahc_softc **)sdev->host->hostdata); | |
604 | struct scsi_target *starget = sdev->sdev_target; | |
605 | struct ahc_linux_target *targ = scsi_transport_target_data(starget); | |
606 | struct ahc_linux_device *dev; | |
607 | ||
608 | if (bootverbose) | |
609 | printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); | |
610 | ||
611 | BUG_ON(targ->sdev[sdev->lun] != NULL); | |
612 | ||
613 | dev = scsi_transport_device_data(sdev); | |
614 | memset(dev, 0, sizeof(*dev)); | |
615 | ||
616 | /* | |
617 | * We start out life using untagged | |
618 | * transactions of which we allow one. | |
619 | */ | |
620 | dev->openings = 1; | |
621 | ||
622 | /* | |
623 | * Set maxtags to 0. This will be changed if we | |
624 | * later determine that we are dealing with | |
625 | * a tagged queuing capable device. | |
626 | */ | |
627 | dev->maxtags = 0; | |
628 | ||
629 | targ->sdev[sdev->lun] = sdev; | |
630 | ||
79778a27 JB |
631 | spi_period(starget) = 0; |
632 | ||
b1abb4d6 | 633 | return 0; |
1da177e4 LT |
634 | } |
635 | ||
636 | static int | |
b1abb4d6 | 637 | ahc_linux_slave_configure(struct scsi_device *sdev) |
1da177e4 LT |
638 | { |
639 | struct ahc_softc *ahc; | |
1da177e4 | 640 | |
b1abb4d6 | 641 | ahc = *((struct ahc_softc **)sdev->host->hostdata); |
c7525233 | 642 | |
1da177e4 | 643 | if (bootverbose) |
b1abb4d6 | 644 | printf("%s: Slave Configure %d\n", ahc_name(ahc), sdev->id); |
c7525233 | 645 | |
b1abb4d6 | 646 | ahc_linux_device_queue_depth(sdev); |
cb624029 | 647 | |
648 | /* Initial Domain Validation */ | |
b1abb4d6 JB |
649 | if (!spi_initial_dv(sdev->sdev_target)) |
650 | spi_dv_device(sdev); | |
cb624029 | 651 | |
c7525233 | 652 | return 0; |
1da177e4 LT |
653 | } |
654 | ||
655 | static void | |
b1abb4d6 | 656 | ahc_linux_slave_destroy(struct scsi_device *sdev) |
1da177e4 LT |
657 | { |
658 | struct ahc_softc *ahc; | |
b1abb4d6 JB |
659 | struct ahc_linux_device *dev = scsi_transport_device_data(sdev); |
660 | struct ahc_linux_target *targ = scsi_transport_target_data(sdev->sdev_target); | |
1da177e4 | 661 | |
b1abb4d6 | 662 | ahc = *((struct ahc_softc **)sdev->host->hostdata); |
1da177e4 | 663 | if (bootverbose) |
b1abb4d6 | 664 | printf("%s: Slave Destroy %d\n", ahc_name(ahc), sdev->id); |
c7525233 JB |
665 | |
666 | BUG_ON(dev->active); | |
667 | ||
b1abb4d6 | 668 | targ->sdev[sdev->lun] = NULL; |
1da177e4 | 669 | } |
1da177e4 LT |
670 | |
671 | #if defined(__i386__) | |
672 | /* | |
673 | * Return the disk geometry for the given SCSI device. | |
674 | */ | |
675 | static int | |
1da177e4 LT |
676 | ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
677 | sector_t capacity, int geom[]) | |
678 | { | |
679 | uint8_t *bh; | |
1da177e4 LT |
680 | int heads; |
681 | int sectors; | |
682 | int cylinders; | |
683 | int ret; | |
684 | int extended; | |
685 | struct ahc_softc *ahc; | |
686 | u_int channel; | |
687 | ||
688 | ahc = *((struct ahc_softc **)sdev->host->hostdata); | |
689 | channel = sdev->channel; | |
690 | ||
1da177e4 | 691 | bh = scsi_bios_ptable(bdev); |
1da177e4 LT |
692 | if (bh) { |
693 | ret = scsi_partsize(bh, capacity, | |
694 | &geom[2], &geom[0], &geom[1]); | |
1da177e4 | 695 | kfree(bh); |
1da177e4 LT |
696 | if (ret != -1) |
697 | return (ret); | |
698 | } | |
699 | heads = 64; | |
700 | sectors = 32; | |
701 | cylinders = aic_sector_div(capacity, heads, sectors); | |
702 | ||
703 | if (aic7xxx_extended != 0) | |
704 | extended = 1; | |
705 | else if (channel == 0) | |
706 | extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; | |
707 | else | |
708 | extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; | |
709 | if (extended && cylinders >= 1024) { | |
710 | heads = 255; | |
711 | sectors = 63; | |
712 | cylinders = aic_sector_div(capacity, heads, sectors); | |
713 | } | |
714 | geom[0] = heads; | |
715 | geom[1] = sectors; | |
716 | geom[2] = cylinders; | |
717 | return (0); | |
718 | } | |
719 | #endif | |
720 | ||
721 | /* | |
722 | * Abort the current SCSI command(s). | |
723 | */ | |
724 | static int | |
013791ee | 725 | ahc_linux_abort(struct scsi_cmnd *cmd) |
1da177e4 LT |
726 | { |
727 | int error; | |
728 | ||
729 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); | |
730 | if (error != 0) | |
731 | printf("aic7xxx_abort returns 0x%x\n", error); | |
732 | return (error); | |
733 | } | |
734 | ||
735 | /* | |
736 | * Attempt to send a target reset message to the device that timed out. | |
737 | */ | |
738 | static int | |
013791ee | 739 | ahc_linux_dev_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
740 | { |
741 | int error; | |
742 | ||
743 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); | |
744 | if (error != 0) | |
745 | printf("aic7xxx_dev_reset returns 0x%x\n", error); | |
746 | return (error); | |
747 | } | |
748 | ||
749 | /* | |
750 | * Reset the SCSI bus. | |
751 | */ | |
752 | static int | |
013791ee | 753 | ahc_linux_bus_reset(struct scsi_cmnd *cmd) |
1da177e4 LT |
754 | { |
755 | struct ahc_softc *ahc; | |
1da177e4 | 756 | int found; |
68b3aa7c | 757 | unsigned long flags; |
1da177e4 LT |
758 | |
759 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
68b3aa7c JG |
760 | |
761 | ahc_lock(ahc, &flags); | |
1da177e4 LT |
762 | found = ahc_reset_channel(ahc, cmd->device->channel + 'A', |
763 | /*initiate reset*/TRUE); | |
68b3aa7c | 764 | ahc_unlock(ahc, &flags); |
1da177e4 LT |
765 | |
766 | if (bootverbose) | |
767 | printf("%s: SCSI bus reset delivered. " | |
768 | "%d SCBs aborted.\n", ahc_name(ahc), found); | |
769 | ||
770 | return SUCCESS; | |
771 | } | |
772 | ||
013791ee | 773 | struct scsi_host_template aic7xxx_driver_template = { |
1da177e4 LT |
774 | .module = THIS_MODULE, |
775 | .name = "aic7xxx", | |
dfd287f6 | 776 | .proc_name = "aic7xxx", |
1da177e4 LT |
777 | .proc_info = ahc_linux_proc_info, |
778 | .info = ahc_linux_info, | |
779 | .queuecommand = ahc_linux_queue, | |
780 | .eh_abort_handler = ahc_linux_abort, | |
781 | .eh_device_reset_handler = ahc_linux_dev_reset, | |
782 | .eh_bus_reset_handler = ahc_linux_bus_reset, | |
783 | #if defined(__i386__) | |
784 | .bios_param = ahc_linux_biosparam, | |
785 | #endif | |
786 | .can_queue = AHC_MAX_QUEUE, | |
787 | .this_id = -1, | |
788 | .cmd_per_lun = 2, | |
789 | .use_clustering = ENABLE_CLUSTERING, | |
790 | .slave_alloc = ahc_linux_slave_alloc, | |
791 | .slave_configure = ahc_linux_slave_configure, | |
792 | .slave_destroy = ahc_linux_slave_destroy, | |
b1abb4d6 JB |
793 | .target_alloc = ahc_linux_target_alloc, |
794 | .target_destroy = ahc_linux_target_destroy, | |
1da177e4 LT |
795 | }; |
796 | ||
797 | /**************************** Tasklet Handler *********************************/ | |
798 | ||
1da177e4 LT |
799 | /******************************** Macros **************************************/ |
800 | #define BUILD_SCSIID(ahc, cmd) \ | |
801 | ((((cmd)->device->id << TID_SHIFT) & TID) \ | |
802 | | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ | |
803 | | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) | |
804 | ||
805 | /******************************** Bus DMA *************************************/ | |
806 | int | |
807 | ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, | |
808 | bus_size_t alignment, bus_size_t boundary, | |
809 | dma_addr_t lowaddr, dma_addr_t highaddr, | |
810 | bus_dma_filter_t *filter, void *filterarg, | |
811 | bus_size_t maxsize, int nsegments, | |
812 | bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) | |
813 | { | |
814 | bus_dma_tag_t dmat; | |
815 | ||
816 | dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); | |
817 | if (dmat == NULL) | |
818 | return (ENOMEM); | |
819 | ||
820 | /* | |
821 | * Linux is very simplistic about DMA memory. For now don't | |
822 | * maintain all specification information. Once Linux supplies | |
823 | * better facilities for doing these operations, or the | |
824 | * needs of this particular driver change, we might need to do | |
825 | * more here. | |
826 | */ | |
827 | dmat->alignment = alignment; | |
828 | dmat->boundary = boundary; | |
829 | dmat->maxsize = maxsize; | |
830 | *ret_tag = dmat; | |
831 | return (0); | |
832 | } | |
833 | ||
834 | void | |
835 | ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) | |
836 | { | |
837 | free(dmat, M_DEVBUF); | |
838 | } | |
839 | ||
840 | int | |
841 | ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, | |
842 | int flags, bus_dmamap_t *mapp) | |
843 | { | |
1da177e4 | 844 | *vaddr = pci_alloc_consistent(ahc->dev_softc, |
7dfa0f26 | 845 | dmat->maxsize, mapp); |
1da177e4 | 846 | if (*vaddr == NULL) |
7dfa0f26 CH |
847 | return ENOMEM; |
848 | return 0; | |
1da177e4 LT |
849 | } |
850 | ||
851 | void | |
852 | ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, | |
853 | void* vaddr, bus_dmamap_t map) | |
854 | { | |
855 | pci_free_consistent(ahc->dev_softc, dmat->maxsize, | |
7dfa0f26 | 856 | vaddr, map); |
1da177e4 LT |
857 | } |
858 | ||
859 | int | |
860 | ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, | |
861 | void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, | |
862 | void *cb_arg, int flags) | |
863 | { | |
864 | /* | |
865 | * Assume for now that this will only be used during | |
866 | * initialization and not for per-transaction buffer mapping. | |
867 | */ | |
868 | bus_dma_segment_t stack_sg; | |
869 | ||
7dfa0f26 | 870 | stack_sg.ds_addr = map; |
1da177e4 LT |
871 | stack_sg.ds_len = dmat->maxsize; |
872 | cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); | |
873 | return (0); | |
874 | } | |
875 | ||
876 | void | |
877 | ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | |
878 | { | |
1da177e4 LT |
879 | } |
880 | ||
881 | int | |
882 | ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) | |
883 | { | |
884 | /* Nothing to do */ | |
885 | return (0); | |
886 | } | |
887 | ||
1da177e4 LT |
888 | static void |
889 | ahc_linux_setup_tag_info_global(char *p) | |
890 | { | |
891 | int tags, i, j; | |
892 | ||
893 | tags = simple_strtoul(p + 1, NULL, 0) & 0xff; | |
894 | printf("Setting Global Tags= %d\n", tags); | |
895 | ||
896 | for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) { | |
897 | for (j = 0; j < AHC_NUM_TARGETS; j++) { | |
898 | aic7xxx_tag_info[i].tag_commands[j] = tags; | |
899 | } | |
900 | } | |
901 | } | |
902 | ||
903 | static void | |
904 | ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) | |
905 | { | |
906 | ||
907 | if ((instance >= 0) && (targ >= 0) | |
908 | && (instance < NUM_ELEMENTS(aic7xxx_tag_info)) | |
909 | && (targ < AHC_NUM_TARGETS)) { | |
910 | aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; | |
911 | if (bootverbose) | |
912 | printf("tag_info[%d:%d] = %d\n", instance, targ, value); | |
913 | } | |
914 | } | |
915 | ||
1ff92730 CH |
916 | static char * |
917 | ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, | |
918 | void (*callback)(u_long, int, int, int32_t), | |
919 | u_long callback_arg) | |
920 | { | |
921 | char *tok_end; | |
922 | char *tok_end2; | |
923 | int i; | |
924 | int instance; | |
925 | int targ; | |
926 | int done; | |
927 | char tok_list[] = {'.', ',', '{', '}', '\0'}; | |
928 | ||
929 | /* All options use a ':' name/arg separator */ | |
930 | if (*opt_arg != ':') | |
931 | return (opt_arg); | |
932 | opt_arg++; | |
933 | instance = -1; | |
934 | targ = -1; | |
935 | done = FALSE; | |
936 | /* | |
937 | * Restore separator that may be in | |
938 | * the middle of our option argument. | |
939 | */ | |
940 | tok_end = strchr(opt_arg, '\0'); | |
941 | if (tok_end < end) | |
942 | *tok_end = ','; | |
943 | while (!done) { | |
944 | switch (*opt_arg) { | |
945 | case '{': | |
946 | if (instance == -1) { | |
947 | instance = 0; | |
948 | } else { | |
949 | if (depth > 1) { | |
950 | if (targ == -1) | |
951 | targ = 0; | |
952 | } else { | |
953 | printf("Malformed Option %s\n", | |
954 | opt_name); | |
955 | done = TRUE; | |
956 | } | |
957 | } | |
958 | opt_arg++; | |
959 | break; | |
960 | case '}': | |
961 | if (targ != -1) | |
962 | targ = -1; | |
963 | else if (instance != -1) | |
964 | instance = -1; | |
965 | opt_arg++; | |
966 | break; | |
967 | case ',': | |
968 | case '.': | |
969 | if (instance == -1) | |
970 | done = TRUE; | |
971 | else if (targ >= 0) | |
972 | targ++; | |
973 | else if (instance >= 0) | |
974 | instance++; | |
975 | opt_arg++; | |
976 | break; | |
977 | case '\0': | |
978 | done = TRUE; | |
979 | break; | |
980 | default: | |
981 | tok_end = end; | |
982 | for (i = 0; tok_list[i]; i++) { | |
983 | tok_end2 = strchr(opt_arg, tok_list[i]); | |
984 | if ((tok_end2) && (tok_end2 < tok_end)) | |
985 | tok_end = tok_end2; | |
986 | } | |
987 | callback(callback_arg, instance, targ, | |
988 | simple_strtol(opt_arg, NULL, 0)); | |
989 | opt_arg = tok_end; | |
990 | break; | |
991 | } | |
992 | } | |
993 | return (opt_arg); | |
994 | } | |
995 | ||
1da177e4 LT |
996 | /* |
997 | * Handle Linux boot parameters. This routine allows for assigning a value | |
998 | * to a parameter with a ':' between the parameter and the value. | |
999 | * ie. aic7xxx=stpwlev:1,extended | |
1000 | */ | |
1001 | static int | |
1002 | aic7xxx_setup(char *s) | |
1003 | { | |
1004 | int i, n; | |
1005 | char *p; | |
1006 | char *end; | |
1007 | ||
1008 | static struct { | |
1009 | const char *name; | |
1010 | uint32_t *flag; | |
1011 | } options[] = { | |
1012 | { "extended", &aic7xxx_extended }, | |
1013 | { "no_reset", &aic7xxx_no_reset }, | |
1014 | { "verbose", &aic7xxx_verbose }, | |
1015 | { "allow_memio", &aic7xxx_allow_memio}, | |
1016 | #ifdef AHC_DEBUG | |
1017 | { "debug", &ahc_debug }, | |
1018 | #endif | |
1da177e4 LT |
1019 | { "periodic_otag", &aic7xxx_periodic_otag }, |
1020 | { "pci_parity", &aic7xxx_pci_parity }, | |
1021 | { "seltime", &aic7xxx_seltime }, | |
1022 | { "tag_info", NULL }, | |
1023 | { "global_tag_depth", NULL }, | |
1024 | { "dv", NULL } | |
1025 | }; | |
1026 | ||
1027 | end = strchr(s, '\0'); | |
1028 | ||
1029 | /* | |
1030 | * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS | |
1031 | * will never be 0 in this case. | |
1032 | */ | |
1033 | n = 0; | |
1034 | ||
1035 | while ((p = strsep(&s, ",.")) != NULL) { | |
1036 | if (*p == '\0') | |
1037 | continue; | |
1038 | for (i = 0; i < NUM_ELEMENTS(options); i++) { | |
1039 | ||
1040 | n = strlen(options[i].name); | |
1041 | if (strncmp(options[i].name, p, n) == 0) | |
1042 | break; | |
1043 | } | |
1044 | if (i == NUM_ELEMENTS(options)) | |
1045 | continue; | |
1046 | ||
1047 | if (strncmp(p, "global_tag_depth", n) == 0) { | |
1048 | ahc_linux_setup_tag_info_global(p + n); | |
1049 | } else if (strncmp(p, "tag_info", n) == 0) { | |
1ff92730 | 1050 | s = ahc_parse_brace_option("tag_info", p + n, end, |
1da177e4 | 1051 | 2, ahc_linux_setup_tag_info, 0); |
1da177e4 LT |
1052 | } else if (p[n] == ':') { |
1053 | *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); | |
1054 | } else if (strncmp(p, "verbose", n) == 0) { | |
1055 | *(options[i].flag) = 1; | |
1056 | } else { | |
1057 | *(options[i].flag) ^= 0xFFFFFFFF; | |
1058 | } | |
1059 | } | |
1060 | return 1; | |
1061 | } | |
1062 | ||
1063 | __setup("aic7xxx=", aic7xxx_setup); | |
1064 | ||
1065 | uint32_t aic7xxx_verbose; | |
1066 | ||
1067 | int | |
013791ee | 1068 | ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) |
1da177e4 LT |
1069 | { |
1070 | char buf[80]; | |
1071 | struct Scsi_Host *host; | |
1072 | char *new_name; | |
1073 | u_long s; | |
1da177e4 LT |
1074 | |
1075 | template->name = ahc->description; | |
1076 | host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); | |
1077 | if (host == NULL) | |
1078 | return (ENOMEM); | |
1079 | ||
1080 | *((struct ahc_softc **)host->hostdata) = ahc; | |
1081 | ahc_lock(ahc, &s); | |
1da177e4 | 1082 | scsi_assign_lock(host, &ahc->platform_data->spin_lock); |
1da177e4 LT |
1083 | ahc->platform_data->host = host; |
1084 | host->can_queue = AHC_MAX_QUEUE; | |
1085 | host->cmd_per_lun = 2; | |
1086 | /* XXX No way to communicate the ID for multiple channels */ | |
1087 | host->this_id = ahc->our_id; | |
1088 | host->irq = ahc->platform_data->irq; | |
1089 | host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; | |
1090 | host->max_lun = AHC_NUM_LUNS; | |
1091 | host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; | |
1092 | host->sg_tablesize = AHC_NSEG; | |
2a40342e | 1093 | ahc_set_unit(ahc, ahc_linux_unit++); |
1da177e4 LT |
1094 | sprintf(buf, "scsi%d", host->host_no); |
1095 | new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); | |
1096 | if (new_name != NULL) { | |
1097 | strcpy(new_name, buf); | |
1098 | ahc_set_name(ahc, new_name); | |
1099 | } | |
1100 | host->unique_id = ahc->unit; | |
1da177e4 | 1101 | ahc_linux_initialize_scsi_bus(ahc); |
1da177e4 | 1102 | ahc_intr_enable(ahc, TRUE); |
1da177e4 LT |
1103 | ahc_unlock(ahc, &s); |
1104 | ||
92d161c3 | 1105 | host->transportt = ahc_linux_transport_template; |
1106 | ||
1da177e4 LT |
1107 | scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */ |
1108 | scsi_scan_host(host); | |
1da177e4 LT |
1109 | return (0); |
1110 | } | |
1111 | ||
1da177e4 LT |
1112 | /* |
1113 | * Place the SCSI bus into a known state by either resetting it, | |
1114 | * or forcing transfer negotiations on the next command to any | |
1115 | * target. | |
1116 | */ | |
1117 | void | |
1118 | ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) | |
1119 | { | |
1120 | int i; | |
1121 | int numtarg; | |
1122 | ||
1123 | i = 0; | |
1124 | numtarg = 0; | |
1125 | ||
1126 | if (aic7xxx_no_reset != 0) | |
1127 | ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); | |
1128 | ||
1129 | if ((ahc->flags & AHC_RESET_BUS_A) != 0) | |
1130 | ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); | |
1131 | else | |
1132 | numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; | |
1133 | ||
1134 | if ((ahc->features & AHC_TWIN) != 0) { | |
1135 | ||
1136 | if ((ahc->flags & AHC_RESET_BUS_B) != 0) { | |
1137 | ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); | |
1138 | } else { | |
1139 | if (numtarg == 0) | |
1140 | i = 8; | |
1141 | numtarg += 8; | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * Force negotiation to async for all targets that | |
1147 | * will not see an initial bus reset. | |
1148 | */ | |
1149 | for (; i < numtarg; i++) { | |
1150 | struct ahc_devinfo devinfo; | |
1151 | struct ahc_initiator_tinfo *tinfo; | |
1152 | struct ahc_tmode_tstate *tstate; | |
1153 | u_int our_id; | |
1154 | u_int target_id; | |
1155 | char channel; | |
1156 | ||
1157 | channel = 'A'; | |
1158 | our_id = ahc->our_id; | |
1159 | target_id = i; | |
1160 | if (i > 7 && (ahc->features & AHC_TWIN) != 0) { | |
1161 | channel = 'B'; | |
1162 | our_id = ahc->our_id_b; | |
1163 | target_id = i % 8; | |
1164 | } | |
1165 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, | |
1166 | target_id, &tstate); | |
1167 | ahc_compile_devinfo(&devinfo, our_id, target_id, | |
1168 | CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); | |
1169 | ahc_update_neg_request(ahc, &devinfo, tstate, | |
1170 | tinfo, AHC_NEG_ALWAYS); | |
1171 | } | |
1172 | /* Give the bus some time to recover */ | |
1173 | if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { | |
1174 | ahc_linux_freeze_simq(ahc); | |
1175 | init_timer(&ahc->platform_data->reset_timer); | |
1176 | ahc->platform_data->reset_timer.data = (u_long)ahc; | |
1177 | ahc->platform_data->reset_timer.expires = | |
1178 | jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000; | |
1179 | ahc->platform_data->reset_timer.function = | |
1180 | ahc_linux_release_simq; | |
1181 | add_timer(&ahc->platform_data->reset_timer); | |
1182 | } | |
1183 | } | |
1184 | ||
1185 | int | |
1186 | ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) | |
1187 | { | |
1188 | ||
1189 | ahc->platform_data = | |
1190 | malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); | |
1191 | if (ahc->platform_data == NULL) | |
1192 | return (ENOMEM); | |
1193 | memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); | |
1da177e4 | 1194 | ahc->platform_data->irq = AHC_LINUX_NOIRQ; |
1da177e4 | 1195 | ahc_lockinit(ahc); |
1da177e4 | 1196 | init_MUTEX_LOCKED(&ahc->platform_data->eh_sem); |
1da177e4 LT |
1197 | ahc->seltime = (aic7xxx_seltime & 0x3) << 4; |
1198 | ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; | |
1199 | if (aic7xxx_pci_parity == 0) | |
1200 | ahc->flags |= AHC_DISABLE_PCI_PERR; | |
1201 | ||
1202 | return (0); | |
1203 | } | |
1204 | ||
1205 | void | |
1206 | ahc_platform_free(struct ahc_softc *ahc) | |
1207 | { | |
b1abb4d6 | 1208 | struct scsi_target *starget; |
1da177e4 LT |
1209 | int i, j; |
1210 | ||
1211 | if (ahc->platform_data != NULL) { | |
1da177e4 LT |
1212 | /* destroy all of the device and target objects */ |
1213 | for (i = 0; i < AHC_NUM_TARGETS; i++) { | |
b1abb4d6 JB |
1214 | starget = ahc->platform_data->starget[i]; |
1215 | if (starget != NULL) { | |
1da177e4 | 1216 | for (j = 0; j < AHC_NUM_LUNS; j++) { |
b1abb4d6 JB |
1217 | struct ahc_linux_target *targ = |
1218 | scsi_transport_target_data(starget); | |
1da177e4 | 1219 | |
b1abb4d6 | 1220 | if (targ->sdev[j] == NULL) |
1da177e4 | 1221 | continue; |
b1abb4d6 | 1222 | targ->sdev[j] = NULL; |
1da177e4 | 1223 | } |
b1abb4d6 | 1224 | ahc->platform_data->starget[i] = NULL; |
1da177e4 LT |
1225 | } |
1226 | } | |
1227 | ||
1228 | if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) | |
1229 | free_irq(ahc->platform_data->irq, ahc); | |
1230 | if (ahc->tag == BUS_SPACE_PIO | |
1231 | && ahc->bsh.ioport != 0) | |
1232 | release_region(ahc->bsh.ioport, 256); | |
1233 | if (ahc->tag == BUS_SPACE_MEMIO | |
1234 | && ahc->bsh.maddr != NULL) { | |
1235 | iounmap(ahc->bsh.maddr); | |
1236 | release_mem_region(ahc->platform_data->mem_busaddr, | |
1237 | 0x1000); | |
1238 | } | |
dedd8310 | 1239 | |
97af50f6 JB |
1240 | if (ahc->platform_data->host) |
1241 | scsi_host_put(ahc->platform_data->host); | |
1242 | ||
1da177e4 LT |
1243 | free(ahc->platform_data, M_DEVBUF); |
1244 | } | |
1245 | } | |
1246 | ||
1247 | void | |
1248 | ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) | |
1249 | { | |
1250 | ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), | |
1251 | SCB_GET_CHANNEL(ahc, scb), | |
1252 | SCB_GET_LUN(scb), SCB_LIST_NULL, | |
1253 | ROLE_UNKNOWN, CAM_REQUEUE_REQ); | |
1254 | } | |
1255 | ||
1256 | void | |
1257 | ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, | |
1258 | ahc_queue_alg alg) | |
1259 | { | |
b1abb4d6 JB |
1260 | struct scsi_target *starget; |
1261 | struct ahc_linux_target *targ; | |
1da177e4 | 1262 | struct ahc_linux_device *dev; |
b1abb4d6 JB |
1263 | struct scsi_device *sdev; |
1264 | u_int target_offset; | |
1da177e4 LT |
1265 | int was_queuing; |
1266 | int now_queuing; | |
1267 | ||
b1abb4d6 JB |
1268 | target_offset = devinfo->target; |
1269 | if (devinfo->channel != 'A') | |
1270 | target_offset += 8; | |
1271 | starget = ahc->platform_data->starget[target_offset]; | |
1272 | targ = scsi_transport_target_data(starget); | |
1273 | BUG_ON(targ == NULL); | |
1274 | sdev = targ->sdev[devinfo->lun]; | |
1275 | if (sdev == NULL) | |
1da177e4 | 1276 | return; |
b1abb4d6 JB |
1277 | dev = scsi_transport_device_data(sdev); |
1278 | ||
1da177e4 LT |
1279 | was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); |
1280 | switch (alg) { | |
1281 | default: | |
1282 | case AHC_QUEUE_NONE: | |
1283 | now_queuing = 0; | |
1284 | break; | |
1285 | case AHC_QUEUE_BASIC: | |
1286 | now_queuing = AHC_DEV_Q_BASIC; | |
1287 | break; | |
1288 | case AHC_QUEUE_TAGGED: | |
1289 | now_queuing = AHC_DEV_Q_TAGGED; | |
1290 | break; | |
1291 | } | |
1292 | if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 | |
1293 | && (was_queuing != now_queuing) | |
1294 | && (dev->active != 0)) { | |
1295 | dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; | |
1296 | dev->qfrozen++; | |
1297 | } | |
1298 | ||
1299 | dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); | |
1300 | if (now_queuing) { | |
1301 | u_int usertags; | |
1302 | ||
1303 | usertags = ahc_linux_user_tagdepth(ahc, devinfo); | |
1304 | if (!was_queuing) { | |
1305 | /* | |
1306 | * Start out agressively and allow our | |
1307 | * dynamic queue depth algorithm to take | |
1308 | * care of the rest. | |
1309 | */ | |
1310 | dev->maxtags = usertags; | |
1311 | dev->openings = dev->maxtags - dev->active; | |
1312 | } | |
1313 | if (dev->maxtags == 0) { | |
1314 | /* | |
1315 | * Queueing is disabled by the user. | |
1316 | */ | |
1317 | dev->openings = 1; | |
1318 | } else if (alg == AHC_QUEUE_TAGGED) { | |
1319 | dev->flags |= AHC_DEV_Q_TAGGED; | |
1320 | if (aic7xxx_periodic_otag != 0) | |
1321 | dev->flags |= AHC_DEV_PERIODIC_OTAG; | |
1322 | } else | |
1323 | dev->flags |= AHC_DEV_Q_BASIC; | |
1324 | } else { | |
1325 | /* We can only have one opening. */ | |
1326 | dev->maxtags = 0; | |
1327 | dev->openings = 1 - dev->active; | |
1328 | } | |
b1abb4d6 JB |
1329 | switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { |
1330 | case AHC_DEV_Q_BASIC: | |
fdd0edf2 JB |
1331 | scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); |
1332 | scsi_activate_tcq(sdev, dev->openings + dev->active); | |
b1abb4d6 JB |
1333 | break; |
1334 | case AHC_DEV_Q_TAGGED: | |
fdd0edf2 JB |
1335 | scsi_set_tag_type(sdev, MSG_ORDERED_TAG); |
1336 | scsi_activate_tcq(sdev, dev->openings + dev->active); | |
b1abb4d6 JB |
1337 | break; |
1338 | default: | |
1339 | /* | |
1340 | * We allow the OS to queue 2 untagged transactions to | |
1341 | * us at any time even though we can only execute them | |
1342 | * serially on the controller/device. This should | |
1343 | * remove some latency. | |
1344 | */ | |
fdd0edf2 | 1345 | scsi_deactivate_tcq(sdev, 2); |
b1abb4d6 | 1346 | break; |
1da177e4 | 1347 | } |
1da177e4 LT |
1348 | } |
1349 | ||
1350 | int | |
1351 | ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, | |
1352 | int lun, u_int tag, role_t role, uint32_t status) | |
1353 | { | |
e4e360c3 | 1354 | return 0; |
1da177e4 LT |
1355 | } |
1356 | ||
cb624029 | 1357 | static u_int |
1358 | ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) | |
1da177e4 | 1359 | { |
cb624029 | 1360 | static int warned_user; |
1361 | u_int tags; | |
1da177e4 | 1362 | |
cb624029 | 1363 | tags = 0; |
1364 | if ((ahc->user_discenable & devinfo->target_mask) != 0) { | |
1365 | if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) { | |
1366 | if (warned_user == 0) { | |
1da177e4 | 1367 | |
cb624029 | 1368 | printf(KERN_WARNING |
1369 | "aic7xxx: WARNING: Insufficient tag_info instances\n" | |
1370 | "aic7xxx: for installed controllers. Using defaults\n" | |
1371 | "aic7xxx: Please update the aic7xxx_tag_info array in\n" | |
1372 | "aic7xxx: the aic7xxx_osm..c source file.\n"); | |
1373 | warned_user++; | |
1374 | } | |
1375 | tags = AHC_MAX_QUEUE; | |
1376 | } else { | |
1377 | adapter_tag_info_t *tag_info; | |
1da177e4 | 1378 | |
cb624029 | 1379 | tag_info = &aic7xxx_tag_info[ahc->unit]; |
1380 | tags = tag_info->tag_commands[devinfo->target_offset]; | |
1381 | if (tags > AHC_MAX_QUEUE) | |
1382 | tags = AHC_MAX_QUEUE; | |
1383 | } | |
1da177e4 | 1384 | } |
cb624029 | 1385 | return (tags); |
1da177e4 LT |
1386 | } |
1387 | ||
cb624029 | 1388 | /* |
1389 | * Determines the queue depth for a given device. | |
1390 | */ | |
1da177e4 | 1391 | static void |
b1abb4d6 | 1392 | ahc_linux_device_queue_depth(struct scsi_device *sdev) |
1da177e4 | 1393 | { |
cb624029 | 1394 | struct ahc_devinfo devinfo; |
1395 | u_int tags; | |
b1abb4d6 | 1396 | struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); |
1da177e4 | 1397 | |
cb624029 | 1398 | ahc_compile_devinfo(&devinfo, |
b1abb4d6 | 1399 | sdev->sdev_target->channel == 0 |
cb624029 | 1400 | ? ahc->our_id : ahc->our_id_b, |
b1abb4d6 JB |
1401 | sdev->sdev_target->id, sdev->lun, |
1402 | sdev->sdev_target->channel == 0 ? 'A' : 'B', | |
cb624029 | 1403 | ROLE_INITIATOR); |
1404 | tags = ahc_linux_user_tagdepth(ahc, &devinfo); | |
b1abb4d6 | 1405 | if (tags != 0 && sdev->tagged_supported != 0) { |
1da177e4 | 1406 | |
cb624029 | 1407 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED); |
1408 | ahc_print_devinfo(ahc, &devinfo); | |
1409 | printf("Tagged Queuing enabled. Depth %d\n", tags); | |
1da177e4 | 1410 | } else { |
cb624029 | 1411 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE); |
1da177e4 LT |
1412 | } |
1413 | } | |
1414 | ||
e4e360c3 JB |
1415 | static int |
1416 | ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, | |
1417 | struct scsi_cmnd *cmd) | |
1da177e4 | 1418 | { |
cb624029 | 1419 | struct scb *scb; |
1420 | struct hardware_scb *hscb; | |
1421 | struct ahc_initiator_tinfo *tinfo; | |
1422 | struct ahc_tmode_tstate *tstate; | |
1423 | uint16_t mask; | |
e4e360c3 | 1424 | struct scb_tailq *untagged_q = NULL; |
1da177e4 | 1425 | |
e4e360c3 JB |
1426 | /* |
1427 | * Schedule us to run later. The only reason we are not | |
1428 | * running is because the whole controller Q is frozen. | |
1429 | */ | |
1430 | if (ahc->platform_data->qfrozen != 0) | |
1431 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 1432 | |
e4e360c3 JB |
1433 | /* |
1434 | * We only allow one untagged transaction | |
1435 | * per target in the initiator role unless | |
1436 | * we are storing a full busy target *lun* | |
1437 | * table in SCB space. | |
1438 | */ | |
1439 | if (!blk_rq_tagged(cmd->request) | |
1440 | && (ahc->features & AHC_SCB_BTT) == 0) { | |
1441 | int target_offset; | |
1da177e4 | 1442 | |
e4e360c3 JB |
1443 | target_offset = cmd->device->id + cmd->device->channel * 8; |
1444 | untagged_q = &(ahc->untagged_queues[target_offset]); | |
1445 | if (!TAILQ_EMPTY(untagged_q)) | |
1446 | /* if we're already executing an untagged command | |
1447 | * we're busy to another */ | |
1448 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
1449 | } | |
1450 | ||
1451 | /* | |
1452 | * Get an scb to use. | |
1453 | */ | |
8eb37942 CH |
1454 | scb = ahc_get_scb(ahc); |
1455 | if (!scb) | |
1456 | return SCSI_MLQUEUE_HOST_BUSY; | |
1da177e4 | 1457 | |
e4e360c3 JB |
1458 | scb->io_ctx = cmd; |
1459 | scb->platform_data->dev = dev; | |
1460 | hscb = scb->hscb; | |
1461 | cmd->host_scribble = (char *)scb; | |
1da177e4 | 1462 | |
e4e360c3 JB |
1463 | /* |
1464 | * Fill out basics of the HSCB. | |
1465 | */ | |
1466 | hscb->control = 0; | |
1467 | hscb->scsiid = BUILD_SCSIID(ahc, cmd); | |
1468 | hscb->lun = cmd->device->lun; | |
1469 | mask = SCB_GET_TARGET_MASK(ahc, scb); | |
1470 | tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), | |
1471 | SCB_GET_OUR_ID(scb), | |
1472 | SCB_GET_TARGET(ahc, scb), &tstate); | |
1473 | hscb->scsirate = tinfo->scsirate; | |
1474 | hscb->scsioffset = tinfo->curr.offset; | |
1475 | if ((tstate->ultraenb & mask) != 0) | |
1476 | hscb->control |= ULTRAENB; | |
1477 | ||
1478 | if ((ahc->user_discenable & mask) != 0) | |
1479 | hscb->control |= DISCENB; | |
1480 | ||
1481 | if ((tstate->auto_negotiate & mask) != 0) { | |
1482 | scb->flags |= SCB_AUTO_NEGOTIATE; | |
1483 | scb->hscb->control |= MK_MESSAGE; | |
1484 | } | |
1485 | ||
1486 | if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { | |
e4e360c3 JB |
1487 | int msg_bytes; |
1488 | uint8_t tag_msgs[2]; | |
1489 | ||
1490 | msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); | |
1491 | if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { | |
1492 | hscb->control |= tag_msgs[0]; | |
1493 | if (tag_msgs[0] == MSG_ORDERED_TASK) | |
cb624029 | 1494 | dev->commands_since_idle_or_otag = 0; |
dedd8310 CH |
1495 | } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH |
1496 | && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { | |
e4e360c3 JB |
1497 | hscb->control |= MSG_ORDERED_TASK; |
1498 | dev->commands_since_idle_or_otag = 0; | |
cb624029 | 1499 | } else { |
e4e360c3 | 1500 | hscb->control |= MSG_SIMPLE_TASK; |
cb624029 | 1501 | } |
e4e360c3 | 1502 | } |
1da177e4 | 1503 | |
e4e360c3 JB |
1504 | hscb->cdb_len = cmd->cmd_len; |
1505 | if (hscb->cdb_len <= 12) { | |
1506 | memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); | |
1507 | } else { | |
1508 | memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); | |
1509 | scb->flags |= SCB_CDB32_PTR; | |
1510 | } | |
1da177e4 | 1511 | |
e4e360c3 JB |
1512 | scb->platform_data->xfer_len = 0; |
1513 | ahc_set_residual(scb, 0); | |
1514 | ahc_set_sense_residual(scb, 0); | |
1515 | scb->sg_count = 0; | |
1516 | if (cmd->use_sg != 0) { | |
1517 | struct ahc_dma_seg *sg; | |
1518 | struct scatterlist *cur_seg; | |
1519 | struct scatterlist *end_seg; | |
1520 | int nseg; | |
1521 | ||
1522 | cur_seg = (struct scatterlist *)cmd->request_buffer; | |
1523 | nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg, | |
1524 | cmd->sc_data_direction); | |
1525 | end_seg = cur_seg + nseg; | |
1526 | /* Copy the segments into the SG list. */ | |
1527 | sg = scb->sg_list; | |
1528 | /* | |
1529 | * The sg_count may be larger than nseg if | |
1530 | * a transfer crosses a 32bit page. | |
1531 | */ | |
1532 | while (cur_seg < end_seg) { | |
1da177e4 | 1533 | dma_addr_t addr; |
e4e360c3 JB |
1534 | bus_size_t len; |
1535 | int consumed; | |
1536 | ||
1537 | addr = sg_dma_address(cur_seg); | |
1538 | len = sg_dma_len(cur_seg); | |
1539 | consumed = ahc_linux_map_seg(ahc, scb, | |
1540 | sg, addr, len); | |
1541 | sg += consumed; | |
1542 | scb->sg_count += consumed; | |
1543 | cur_seg++; | |
1da177e4 | 1544 | } |
e4e360c3 JB |
1545 | sg--; |
1546 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); | |
1da177e4 | 1547 | |
e4e360c3 JB |
1548 | /* |
1549 | * Reset the sg list pointer. | |
1550 | */ | |
1551 | scb->hscb->sgptr = | |
1552 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); | |
1553 | ||
1554 | /* | |
1555 | * Copy the first SG into the "current" | |
1556 | * data pointer area. | |
1557 | */ | |
1558 | scb->hscb->dataptr = scb->sg_list->addr; | |
1559 | scb->hscb->datacnt = scb->sg_list->len; | |
1560 | } else if (cmd->request_bufflen != 0) { | |
1561 | struct ahc_dma_seg *sg; | |
1562 | dma_addr_t addr; | |
1563 | ||
1564 | sg = scb->sg_list; | |
1565 | addr = pci_map_single(ahc->dev_softc, | |
1566 | cmd->request_buffer, | |
1567 | cmd->request_bufflen, | |
1568 | cmd->sc_data_direction); | |
1569 | scb->platform_data->buf_busaddr = addr; | |
1570 | scb->sg_count = ahc_linux_map_seg(ahc, scb, | |
1571 | sg, addr, | |
1572 | cmd->request_bufflen); | |
1573 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); | |
1da177e4 LT |
1574 | |
1575 | /* | |
e4e360c3 | 1576 | * Reset the sg list pointer. |
1da177e4 | 1577 | */ |
e4e360c3 JB |
1578 | scb->hscb->sgptr = |
1579 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); | |
1580 | ||
1581 | /* | |
1582 | * Copy the first SG into the "current" | |
1583 | * data pointer area. | |
1584 | */ | |
1585 | scb->hscb->dataptr = sg->addr; | |
1586 | scb->hscb->datacnt = sg->len; | |
1587 | } else { | |
1588 | scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); | |
1589 | scb->hscb->dataptr = 0; | |
1590 | scb->hscb->datacnt = 0; | |
1591 | scb->sg_count = 0; | |
1592 | } | |
1593 | ||
1594 | LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); | |
1595 | dev->openings--; | |
1596 | dev->active++; | |
1597 | dev->commands_issued++; | |
1598 | if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) | |
1599 | dev->commands_since_idle_or_otag++; | |
1600 | ||
1601 | scb->flags |= SCB_ACTIVE; | |
1602 | if (untagged_q) { | |
1603 | TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); | |
1604 | scb->flags |= SCB_UNTAGGEDQ; | |
1da177e4 | 1605 | } |
e4e360c3 JB |
1606 | ahc_queue_scb(ahc, scb); |
1607 | return 0; | |
1da177e4 LT |
1608 | } |
1609 | ||
1610 | /* | |
1611 | * SCSI controller interrupt handler. | |
1612 | */ | |
1613 | irqreturn_t | |
1614 | ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs) | |
1615 | { | |
1616 | struct ahc_softc *ahc; | |
1617 | u_long flags; | |
1618 | int ours; | |
1619 | ||
1620 | ahc = (struct ahc_softc *) dev_id; | |
1621 | ahc_lock(ahc, &flags); | |
1622 | ours = ahc_intr(ahc); | |
1da177e4 LT |
1623 | ahc_unlock(ahc, &flags); |
1624 | return IRQ_RETVAL(ours); | |
1625 | } | |
1626 | ||
1627 | void | |
1628 | ahc_platform_flushwork(struct ahc_softc *ahc) | |
1629 | { | |
1630 | ||
1da177e4 LT |
1631 | } |
1632 | ||
1da177e4 LT |
1633 | void |
1634 | ahc_send_async(struct ahc_softc *ahc, char channel, | |
1635 | u_int target, u_int lun, ac_code code, void *arg) | |
1636 | { | |
1637 | switch (code) { | |
1638 | case AC_TRANSFER_NEG: | |
1639 | { | |
1640 | char buf[80]; | |
b1abb4d6 | 1641 | struct scsi_target *starget; |
1da177e4 LT |
1642 | struct ahc_linux_target *targ; |
1643 | struct info_str info; | |
1644 | struct ahc_initiator_tinfo *tinfo; | |
1645 | struct ahc_tmode_tstate *tstate; | |
1646 | int target_offset; | |
b1abb4d6 JB |
1647 | unsigned int target_ppr_options; |
1648 | ||
1649 | BUG_ON(target == CAM_TARGET_WILDCARD); | |
1da177e4 LT |
1650 | |
1651 | info.buffer = buf; | |
1652 | info.length = sizeof(buf); | |
1653 | info.offset = 0; | |
1654 | info.pos = 0; | |
1655 | tinfo = ahc_fetch_transinfo(ahc, channel, | |
1656 | channel == 'A' ? ahc->our_id | |
1657 | : ahc->our_id_b, | |
1658 | target, &tstate); | |
1659 | ||
1660 | /* | |
1661 | * Don't bother reporting results while | |
1662 | * negotiations are still pending. | |
1663 | */ | |
1664 | if (tinfo->curr.period != tinfo->goal.period | |
1665 | || tinfo->curr.width != tinfo->goal.width | |
1666 | || tinfo->curr.offset != tinfo->goal.offset | |
1667 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options) | |
1668 | if (bootverbose == 0) | |
1669 | break; | |
1670 | ||
1671 | /* | |
1672 | * Don't bother reporting results that | |
1673 | * are identical to those last reported. | |
1674 | */ | |
1675 | target_offset = target; | |
1676 | if (channel == 'B') | |
1677 | target_offset += 8; | |
b1abb4d6 | 1678 | starget = ahc->platform_data->starget[target_offset]; |
fc789a93 | 1679 | if (starget == NULL) |
1da177e4 | 1680 | break; |
fc789a93 | 1681 | targ = scsi_transport_target_data(starget); |
b1abb4d6 JB |
1682 | |
1683 | target_ppr_options = | |
1684 | (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) | |
1685 | + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) | |
1686 | + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); | |
1687 | ||
1688 | if (tinfo->curr.period == spi_period(starget) | |
1689 | && tinfo->curr.width == spi_width(starget) | |
1690 | && tinfo->curr.offset == spi_offset(starget) | |
1691 | && tinfo->curr.ppr_options == target_ppr_options) | |
1da177e4 LT |
1692 | if (bootverbose == 0) |
1693 | break; | |
1694 | ||
b1abb4d6 JB |
1695 | spi_period(starget) = tinfo->curr.period; |
1696 | spi_width(starget) = tinfo->curr.width; | |
1697 | spi_offset(starget) = tinfo->curr.offset; | |
f7ff898a JB |
1698 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; |
1699 | spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; | |
1700 | spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; | |
b1abb4d6 | 1701 | spi_display_xfer_agreement(starget); |
1da177e4 LT |
1702 | break; |
1703 | } | |
1704 | case AC_SENT_BDR: | |
1705 | { | |
1da177e4 LT |
1706 | WARN_ON(lun != CAM_LUN_WILDCARD); |
1707 | scsi_report_device_reset(ahc->platform_data->host, | |
1708 | channel - 'A', target); | |
1da177e4 LT |
1709 | break; |
1710 | } | |
1711 | case AC_BUS_RESET: | |
1712 | if (ahc->platform_data->host != NULL) { | |
1713 | scsi_report_bus_reset(ahc->platform_data->host, | |
1714 | channel - 'A'); | |
1715 | } | |
1716 | break; | |
1717 | default: | |
1718 | panic("ahc_send_async: Unexpected async event"); | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | /* | |
1723 | * Calls the higher level scsi done function and frees the scb. | |
1724 | */ | |
1725 | void | |
1726 | ahc_done(struct ahc_softc *ahc, struct scb *scb) | |
1727 | { | |
013791ee | 1728 | struct scsi_cmnd *cmd; |
1da177e4 LT |
1729 | struct ahc_linux_device *dev; |
1730 | ||
1731 | LIST_REMOVE(scb, pending_links); | |
1732 | if ((scb->flags & SCB_UNTAGGEDQ) != 0) { | |
1733 | struct scb_tailq *untagged_q; | |
1734 | int target_offset; | |
1735 | ||
1736 | target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); | |
1737 | untagged_q = &(ahc->untagged_queues[target_offset]); | |
1738 | TAILQ_REMOVE(untagged_q, scb, links.tqe); | |
e4e360c3 | 1739 | BUG_ON(!TAILQ_EMPTY(untagged_q)); |
1da177e4 LT |
1740 | } |
1741 | ||
1742 | if ((scb->flags & SCB_ACTIVE) == 0) { | |
1743 | printf("SCB %d done'd twice\n", scb->hscb->tag); | |
1744 | ahc_dump_card_state(ahc); | |
1745 | panic("Stopping for safety"); | |
1746 | } | |
1747 | cmd = scb->io_ctx; | |
1748 | dev = scb->platform_data->dev; | |
1749 | dev->active--; | |
1750 | dev->openings++; | |
1751 | if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { | |
1752 | cmd->result &= ~(CAM_DEV_QFRZN << 16); | |
1753 | dev->qfrozen--; | |
1754 | } | |
1755 | ahc_linux_unmap_scb(ahc, scb); | |
1756 | ||
1757 | /* | |
1758 | * Guard against stale sense data. | |
1759 | * The Linux mid-layer assumes that sense | |
1760 | * was retrieved anytime the first byte of | |
1761 | * the sense buffer looks "sane". | |
1762 | */ | |
1763 | cmd->sense_buffer[0] = 0; | |
1764 | if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { | |
1765 | uint32_t amount_xferred; | |
1766 | ||
1767 | amount_xferred = | |
1768 | ahc_get_transfer_length(scb) - ahc_get_residual(scb); | |
1769 | if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { | |
1770 | #ifdef AHC_DEBUG | |
1771 | if ((ahc_debug & AHC_SHOW_MISC) != 0) { | |
1772 | ahc_print_path(ahc, scb); | |
1773 | printf("Set CAM_UNCOR_PARITY\n"); | |
1774 | } | |
1775 | #endif | |
1776 | ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); | |
1777 | #ifdef AHC_REPORT_UNDERFLOWS | |
1778 | /* | |
1779 | * This code is disabled by default as some | |
1780 | * clients of the SCSI system do not properly | |
1781 | * initialize the underflow parameter. This | |
1782 | * results in spurious termination of commands | |
1783 | * that complete as expected (e.g. underflow is | |
1784 | * allowed as command can return variable amounts | |
1785 | * of data. | |
1786 | */ | |
1787 | } else if (amount_xferred < scb->io_ctx->underflow) { | |
1788 | u_int i; | |
1789 | ||
1790 | ahc_print_path(ahc, scb); | |
1791 | printf("CDB:"); | |
1792 | for (i = 0; i < scb->io_ctx->cmd_len; i++) | |
1793 | printf(" 0x%x", scb->io_ctx->cmnd[i]); | |
1794 | printf("\n"); | |
1795 | ahc_print_path(ahc, scb); | |
1796 | printf("Saw underflow (%ld of %ld bytes). " | |
1797 | "Treated as error\n", | |
1798 | ahc_get_residual(scb), | |
1799 | ahc_get_transfer_length(scb)); | |
1800 | ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); | |
1801 | #endif | |
1802 | } else { | |
1803 | ahc_set_transaction_status(scb, CAM_REQ_CMP); | |
1804 | } | |
1805 | } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { | |
b1abb4d6 | 1806 | ahc_linux_handle_scsi_status(ahc, cmd->device, scb); |
1da177e4 | 1807 | } |
1da177e4 LT |
1808 | |
1809 | if (dev->openings == 1 | |
1810 | && ahc_get_transaction_status(scb) == CAM_REQ_CMP | |
1811 | && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) | |
1812 | dev->tag_success_count++; | |
1813 | /* | |
1814 | * Some devices deal with temporary internal resource | |
1815 | * shortages by returning queue full. When the queue | |
1816 | * full occurrs, we throttle back. Slowly try to get | |
1817 | * back to our previous queue depth. | |
1818 | */ | |
1819 | if ((dev->openings + dev->active) < dev->maxtags | |
1820 | && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { | |
1821 | dev->tag_success_count = 0; | |
1822 | dev->openings++; | |
1823 | } | |
1824 | ||
1825 | if (dev->active == 0) | |
1826 | dev->commands_since_idle_or_otag = 0; | |
1827 | ||
1da177e4 LT |
1828 | if ((scb->flags & SCB_RECOVERY_SCB) != 0) { |
1829 | printf("Recovery SCB completes\n"); | |
1830 | if (ahc_get_transaction_status(scb) == CAM_BDR_SENT | |
1831 | || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) | |
1832 | ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); | |
1833 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { | |
1834 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; | |
1835 | up(&ahc->platform_data->eh_sem); | |
1836 | } | |
1837 | } | |
1838 | ||
1839 | ahc_free_scb(ahc, scb); | |
1840 | ahc_linux_queue_cmd_complete(ahc, cmd); | |
1da177e4 LT |
1841 | } |
1842 | ||
1843 | static void | |
1844 | ahc_linux_handle_scsi_status(struct ahc_softc *ahc, | |
b1abb4d6 | 1845 | struct scsi_device *sdev, struct scb *scb) |
1da177e4 LT |
1846 | { |
1847 | struct ahc_devinfo devinfo; | |
b1abb4d6 | 1848 | struct ahc_linux_device *dev = scsi_transport_device_data(sdev); |
1da177e4 LT |
1849 | |
1850 | ahc_compile_devinfo(&devinfo, | |
1851 | ahc->our_id, | |
b1abb4d6 JB |
1852 | sdev->sdev_target->id, sdev->lun, |
1853 | sdev->sdev_target->channel == 0 ? 'A' : 'B', | |
1da177e4 LT |
1854 | ROLE_INITIATOR); |
1855 | ||
1856 | /* | |
1857 | * We don't currently trust the mid-layer to | |
1858 | * properly deal with queue full or busy. So, | |
1859 | * when one occurs, we tell the mid-layer to | |
1860 | * unconditionally requeue the command to us | |
1861 | * so that we can retry it ourselves. We also | |
1862 | * implement our own throttling mechanism so | |
1863 | * we don't clobber the device with too many | |
1864 | * commands. | |
1865 | */ | |
1866 | switch (ahc_get_scsi_status(scb)) { | |
1867 | default: | |
1868 | break; | |
1869 | case SCSI_STATUS_CHECK_COND: | |
1870 | case SCSI_STATUS_CMD_TERMINATED: | |
1871 | { | |
013791ee | 1872 | struct scsi_cmnd *cmd; |
1da177e4 LT |
1873 | |
1874 | /* | |
1875 | * Copy sense information to the OS's cmd | |
1876 | * structure if it is available. | |
1877 | */ | |
1878 | cmd = scb->io_ctx; | |
1879 | if (scb->flags & SCB_SENSE) { | |
1880 | u_int sense_size; | |
1881 | ||
1882 | sense_size = MIN(sizeof(struct scsi_sense_data) | |
1883 | - ahc_get_sense_residual(scb), | |
1884 | sizeof(cmd->sense_buffer)); | |
1885 | memcpy(cmd->sense_buffer, | |
1886 | ahc_get_sense_buf(ahc, scb), sense_size); | |
1887 | if (sense_size < sizeof(cmd->sense_buffer)) | |
1888 | memset(&cmd->sense_buffer[sense_size], 0, | |
1889 | sizeof(cmd->sense_buffer) - sense_size); | |
1890 | cmd->result |= (DRIVER_SENSE << 24); | |
1891 | #ifdef AHC_DEBUG | |
1892 | if (ahc_debug & AHC_SHOW_SENSE) { | |
1893 | int i; | |
1894 | ||
1895 | printf("Copied %d bytes of sense data:", | |
1896 | sense_size); | |
1897 | for (i = 0; i < sense_size; i++) { | |
1898 | if ((i & 0xF) == 0) | |
1899 | printf("\n"); | |
1900 | printf("0x%x ", cmd->sense_buffer[i]); | |
1901 | } | |
1902 | printf("\n"); | |
1903 | } | |
1904 | #endif | |
1905 | } | |
1906 | break; | |
1907 | } | |
1908 | case SCSI_STATUS_QUEUE_FULL: | |
1909 | { | |
1910 | /* | |
1911 | * By the time the core driver has returned this | |
1912 | * command, all other commands that were queued | |
1913 | * to us but not the device have been returned. | |
1914 | * This ensures that dev->active is equal to | |
1915 | * the number of commands actually queued to | |
1916 | * the device. | |
1917 | */ | |
1918 | dev->tag_success_count = 0; | |
1919 | if (dev->active != 0) { | |
1920 | /* | |
1921 | * Drop our opening count to the number | |
1922 | * of commands currently outstanding. | |
1923 | */ | |
1924 | dev->openings = 0; | |
1925 | /* | |
1926 | ahc_print_path(ahc, scb); | |
1927 | printf("Dropping tag count to %d\n", dev->active); | |
1928 | */ | |
1929 | if (dev->active == dev->tags_on_last_queuefull) { | |
1930 | ||
1931 | dev->last_queuefull_same_count++; | |
1932 | /* | |
1933 | * If we repeatedly see a queue full | |
1934 | * at the same queue depth, this | |
1935 | * device has a fixed number of tag | |
1936 | * slots. Lock in this tag depth | |
1937 | * so we stop seeing queue fulls from | |
1938 | * this device. | |
1939 | */ | |
1940 | if (dev->last_queuefull_same_count | |
1941 | == AHC_LOCK_TAGS_COUNT) { | |
1942 | dev->maxtags = dev->active; | |
1943 | ahc_print_path(ahc, scb); | |
1944 | printf("Locking max tag count at %d\n", | |
1945 | dev->active); | |
1946 | } | |
1947 | } else { | |
1948 | dev->tags_on_last_queuefull = dev->active; | |
1949 | dev->last_queuefull_same_count = 0; | |
1950 | } | |
1951 | ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); | |
1952 | ahc_set_scsi_status(scb, SCSI_STATUS_OK); | |
1953 | ahc_platform_set_tags(ahc, &devinfo, | |
1954 | (dev->flags & AHC_DEV_Q_BASIC) | |
1955 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | |
1956 | break; | |
1957 | } | |
1958 | /* | |
1959 | * Drop down to a single opening, and treat this | |
1960 | * as if the target returned BUSY SCSI status. | |
1961 | */ | |
1962 | dev->openings = 1; | |
1963 | ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); | |
1964 | ahc_platform_set_tags(ahc, &devinfo, | |
1965 | (dev->flags & AHC_DEV_Q_BASIC) | |
1966 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); | |
1da177e4 LT |
1967 | break; |
1968 | } | |
1969 | } | |
1970 | } | |
1971 | ||
1972 | static void | |
013791ee | 1973 | ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) |
1da177e4 | 1974 | { |
1da177e4 LT |
1975 | /* |
1976 | * Map CAM error codes into Linux Error codes. We | |
1977 | * avoid the conversion so that the DV code has the | |
1978 | * full error information available when making | |
1979 | * state change decisions. | |
1980 | */ | |
cb624029 | 1981 | { |
1da177e4 LT |
1982 | u_int new_status; |
1983 | ||
1984 | switch (ahc_cmd_get_transaction_status(cmd)) { | |
1985 | case CAM_REQ_INPROG: | |
1986 | case CAM_REQ_CMP: | |
1987 | case CAM_SCSI_STATUS_ERROR: | |
1988 | new_status = DID_OK; | |
1989 | break; | |
1990 | case CAM_REQ_ABORTED: | |
1991 | new_status = DID_ABORT; | |
1992 | break; | |
1993 | case CAM_BUSY: | |
1994 | new_status = DID_BUS_BUSY; | |
1995 | break; | |
1996 | case CAM_REQ_INVALID: | |
1997 | case CAM_PATH_INVALID: | |
1998 | new_status = DID_BAD_TARGET; | |
1999 | break; | |
2000 | case CAM_SEL_TIMEOUT: | |
2001 | new_status = DID_NO_CONNECT; | |
2002 | break; | |
2003 | case CAM_SCSI_BUS_RESET: | |
2004 | case CAM_BDR_SENT: | |
2005 | new_status = DID_RESET; | |
2006 | break; | |
2007 | case CAM_UNCOR_PARITY: | |
2008 | new_status = DID_PARITY; | |
2009 | break; | |
2010 | case CAM_CMD_TIMEOUT: | |
2011 | new_status = DID_TIME_OUT; | |
2012 | break; | |
2013 | case CAM_UA_ABORT: | |
2014 | case CAM_REQ_CMP_ERR: | |
2015 | case CAM_AUTOSENSE_FAIL: | |
2016 | case CAM_NO_HBA: | |
2017 | case CAM_DATA_RUN_ERR: | |
2018 | case CAM_UNEXP_BUSFREE: | |
2019 | case CAM_SEQUENCE_FAIL: | |
2020 | case CAM_CCB_LEN_ERR: | |
2021 | case CAM_PROVIDE_FAIL: | |
2022 | case CAM_REQ_TERMIO: | |
2023 | case CAM_UNREC_HBA_ERROR: | |
2024 | case CAM_REQ_TOO_BIG: | |
2025 | new_status = DID_ERROR; | |
2026 | break; | |
2027 | case CAM_REQUEUE_REQ: | |
8e45ebcc | 2028 | new_status = DID_REQUEUE; |
1da177e4 LT |
2029 | break; |
2030 | default: | |
2031 | /* We should never get here */ | |
2032 | new_status = DID_ERROR; | |
2033 | break; | |
2034 | } | |
2035 | ||
2036 | ahc_cmd_set_transaction_status(cmd, new_status); | |
2037 | } | |
2038 | ||
8e45ebcc | 2039 | cmd->scsi_done(cmd); |
1da177e4 LT |
2040 | } |
2041 | ||
1da177e4 LT |
2042 | static void |
2043 | ahc_linux_sem_timeout(u_long arg) | |
2044 | { | |
2045 | struct ahc_softc *ahc; | |
2046 | u_long s; | |
2047 | ||
2048 | ahc = (struct ahc_softc *)arg; | |
2049 | ||
2050 | ahc_lock(ahc, &s); | |
2051 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { | |
2052 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; | |
2053 | up(&ahc->platform_data->eh_sem); | |
2054 | } | |
2055 | ahc_unlock(ahc, &s); | |
2056 | } | |
2057 | ||
2058 | static void | |
2059 | ahc_linux_freeze_simq(struct ahc_softc *ahc) | |
2060 | { | |
2061 | ahc->platform_data->qfrozen++; | |
2062 | if (ahc->platform_data->qfrozen == 1) { | |
2063 | scsi_block_requests(ahc->platform_data->host); | |
2064 | ||
2065 | /* XXX What about Twin channels? */ | |
2066 | ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, | |
2067 | CAM_LUN_WILDCARD, SCB_LIST_NULL, | |
2068 | ROLE_INITIATOR, CAM_REQUEUE_REQ); | |
2069 | } | |
2070 | } | |
2071 | ||
2072 | static void | |
2073 | ahc_linux_release_simq(u_long arg) | |
2074 | { | |
2075 | struct ahc_softc *ahc; | |
2076 | u_long s; | |
2077 | int unblock_reqs; | |
2078 | ||
2079 | ahc = (struct ahc_softc *)arg; | |
2080 | ||
2081 | unblock_reqs = 0; | |
2082 | ahc_lock(ahc, &s); | |
2083 | if (ahc->platform_data->qfrozen > 0) | |
2084 | ahc->platform_data->qfrozen--; | |
2085 | if (ahc->platform_data->qfrozen == 0) | |
2086 | unblock_reqs = 1; | |
1da177e4 LT |
2087 | ahc_unlock(ahc, &s); |
2088 | /* | |
2089 | * There is still a race here. The mid-layer | |
2090 | * should keep its own freeze count and use | |
2091 | * a bottom half handler to run the queues | |
2092 | * so we can unblock with our own lock held. | |
2093 | */ | |
2094 | if (unblock_reqs) | |
2095 | scsi_unblock_requests(ahc->platform_data->host); | |
2096 | } | |
2097 | ||
1da177e4 | 2098 | static int |
013791ee | 2099 | ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) |
1da177e4 LT |
2100 | { |
2101 | struct ahc_softc *ahc; | |
1da177e4 LT |
2102 | struct ahc_linux_device *dev; |
2103 | struct scb *pending_scb; | |
1da177e4 LT |
2104 | u_int saved_scbptr; |
2105 | u_int active_scb_index; | |
2106 | u_int last_phase; | |
2107 | u_int saved_scsiid; | |
2108 | u_int cdb_byte; | |
2109 | int retval; | |
2110 | int was_paused; | |
2111 | int paused; | |
2112 | int wait; | |
2113 | int disconnected; | |
2114 | ||
2115 | pending_scb = NULL; | |
2116 | paused = FALSE; | |
2117 | wait = FALSE; | |
2118 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; | |
1da177e4 LT |
2119 | |
2120 | printf("%s:%d:%d:%d: Attempting to queue a%s message\n", | |
2121 | ahc_name(ahc), cmd->device->channel, | |
2122 | cmd->device->id, cmd->device->lun, | |
2123 | flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); | |
2124 | ||
2125 | printf("CDB:"); | |
2126 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) | |
2127 | printf(" 0x%x", cmd->cmnd[cdb_byte]); | |
2128 | printf("\n"); | |
2129 | ||
8fa728a2 JG |
2130 | spin_lock_irq(&ahc->platform_data->spin_lock); |
2131 | ||
1da177e4 LT |
2132 | /* |
2133 | * First determine if we currently own this command. | |
2134 | * Start by searching the device queue. If not found | |
2135 | * there, check the pending_scb list. If not found | |
2136 | * at all, and the system wanted us to just abort the | |
2137 | * command, return success. | |
2138 | */ | |
b1abb4d6 | 2139 | dev = scsi_transport_device_data(cmd->device); |
1da177e4 LT |
2140 | |
2141 | if (dev == NULL) { | |
2142 | /* | |
2143 | * No target device for this command exists, | |
2144 | * so we must not still own the command. | |
2145 | */ | |
2146 | printf("%s:%d:%d:%d: Is not an active device\n", | |
2147 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2148 | cmd->device->lun); | |
2149 | retval = SUCCESS; | |
2150 | goto no_cmd; | |
2151 | } | |
2152 | ||
1da177e4 LT |
2153 | if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 |
2154 | && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, | |
2155 | cmd->device->channel + 'A', | |
2156 | cmd->device->lun, | |
2157 | CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { | |
2158 | printf("%s:%d:%d:%d: Command found on untagged queue\n", | |
2159 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2160 | cmd->device->lun); | |
2161 | retval = SUCCESS; | |
2162 | goto done; | |
2163 | } | |
2164 | ||
2165 | /* | |
2166 | * See if we can find a matching cmd in the pending list. | |
2167 | */ | |
2168 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | |
2169 | if (pending_scb->io_ctx == cmd) | |
2170 | break; | |
2171 | } | |
2172 | ||
2173 | if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { | |
2174 | ||
2175 | /* Any SCB for this device will do for a target reset */ | |
2176 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { | |
2177 | if (ahc_match_scb(ahc, pending_scb, cmd->device->id, | |
2178 | cmd->device->channel + 'A', | |
2179 | CAM_LUN_WILDCARD, | |
2180 | SCB_LIST_NULL, ROLE_INITIATOR) == 0) | |
2181 | break; | |
2182 | } | |
2183 | } | |
2184 | ||
2185 | if (pending_scb == NULL) { | |
2186 | printf("%s:%d:%d:%d: Command not found\n", | |
2187 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2188 | cmd->device->lun); | |
2189 | goto no_cmd; | |
2190 | } | |
2191 | ||
2192 | if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { | |
2193 | /* | |
2194 | * We can't queue two recovery actions using the same SCB | |
2195 | */ | |
2196 | retval = FAILED; | |
2197 | goto done; | |
2198 | } | |
2199 | ||
2200 | /* | |
2201 | * Ensure that the card doesn't do anything | |
2202 | * behind our back and that we didn't "just" miss | |
2203 | * an interrupt that would affect this cmd. | |
2204 | */ | |
2205 | was_paused = ahc_is_paused(ahc); | |
2206 | ahc_pause_and_flushwork(ahc); | |
2207 | paused = TRUE; | |
2208 | ||
2209 | if ((pending_scb->flags & SCB_ACTIVE) == 0) { | |
2210 | printf("%s:%d:%d:%d: Command already completed\n", | |
2211 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2212 | cmd->device->lun); | |
2213 | goto no_cmd; | |
2214 | } | |
2215 | ||
2216 | printf("%s: At time of recovery, card was %spaused\n", | |
2217 | ahc_name(ahc), was_paused ? "" : "not "); | |
2218 | ahc_dump_card_state(ahc); | |
2219 | ||
2220 | disconnected = TRUE; | |
2221 | if (flag == SCB_ABORT) { | |
2222 | if (ahc_search_qinfifo(ahc, cmd->device->id, | |
2223 | cmd->device->channel + 'A', | |
2224 | cmd->device->lun, | |
2225 | pending_scb->hscb->tag, | |
2226 | ROLE_INITIATOR, CAM_REQ_ABORTED, | |
2227 | SEARCH_COMPLETE) > 0) { | |
2228 | printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", | |
2229 | ahc_name(ahc), cmd->device->channel, | |
2230 | cmd->device->id, cmd->device->lun); | |
2231 | retval = SUCCESS; | |
2232 | goto done; | |
2233 | } | |
2234 | } else if (ahc_search_qinfifo(ahc, cmd->device->id, | |
2235 | cmd->device->channel + 'A', | |
2236 | cmd->device->lun, pending_scb->hscb->tag, | |
2237 | ROLE_INITIATOR, /*status*/0, | |
2238 | SEARCH_COUNT) > 0) { | |
2239 | disconnected = FALSE; | |
2240 | } | |
2241 | ||
2242 | if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { | |
2243 | struct scb *bus_scb; | |
2244 | ||
2245 | bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); | |
2246 | if (bus_scb == pending_scb) | |
2247 | disconnected = FALSE; | |
2248 | else if (flag != SCB_ABORT | |
2249 | && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid | |
2250 | && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) | |
2251 | disconnected = FALSE; | |
2252 | } | |
2253 | ||
2254 | /* | |
2255 | * At this point, pending_scb is the scb associated with the | |
2256 | * passed in command. That command is currently active on the | |
2257 | * bus, is in the disconnected state, or we're hoping to find | |
2258 | * a command for the same target active on the bus to abuse to | |
2259 | * send a BDR. Queue the appropriate message based on which of | |
2260 | * these states we are in. | |
2261 | */ | |
2262 | last_phase = ahc_inb(ahc, LASTPHASE); | |
2263 | saved_scbptr = ahc_inb(ahc, SCBPTR); | |
2264 | active_scb_index = ahc_inb(ahc, SCB_TAG); | |
2265 | saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); | |
2266 | if (last_phase != P_BUSFREE | |
2267 | && (pending_scb->hscb->tag == active_scb_index | |
2268 | || (flag == SCB_DEVICE_RESET | |
2269 | && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) { | |
2270 | ||
2271 | /* | |
2272 | * We're active on the bus, so assert ATN | |
2273 | * and hope that the target responds. | |
2274 | */ | |
2275 | pending_scb = ahc_lookup_scb(ahc, active_scb_index); | |
2276 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | |
2277 | ahc_outb(ahc, MSG_OUT, HOST_MSG); | |
2278 | ahc_outb(ahc, SCSISIGO, last_phase|ATNO); | |
2279 | printf("%s:%d:%d:%d: Device is active, asserting ATN\n", | |
2280 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2281 | cmd->device->lun); | |
2282 | wait = TRUE; | |
2283 | } else if (disconnected) { | |
2284 | ||
2285 | /* | |
2286 | * Actually re-queue this SCB in an attempt | |
2287 | * to select the device before it reconnects. | |
2288 | * In either case (selection or reselection), | |
2289 | * we will now issue the approprate message | |
2290 | * to the timed-out device. | |
2291 | * | |
2292 | * Set the MK_MESSAGE control bit indicating | |
2293 | * that we desire to send a message. We | |
2294 | * also set the disconnected flag since | |
2295 | * in the paging case there is no guarantee | |
2296 | * that our SCB control byte matches the | |
2297 | * version on the card. We don't want the | |
2298 | * sequencer to abort the command thinking | |
2299 | * an unsolicited reselection occurred. | |
2300 | */ | |
2301 | pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; | |
2302 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; | |
2303 | ||
2304 | /* | |
2305 | * Remove any cached copy of this SCB in the | |
2306 | * disconnected list in preparation for the | |
2307 | * queuing of our abort SCB. We use the | |
2308 | * same element in the SCB, SCB_NEXT, for | |
2309 | * both the qinfifo and the disconnected list. | |
2310 | */ | |
2311 | ahc_search_disc_list(ahc, cmd->device->id, | |
2312 | cmd->device->channel + 'A', | |
2313 | cmd->device->lun, pending_scb->hscb->tag, | |
2314 | /*stop_on_first*/TRUE, | |
2315 | /*remove*/TRUE, | |
2316 | /*save_state*/FALSE); | |
2317 | ||
2318 | /* | |
2319 | * In the non-paging case, the sequencer will | |
2320 | * never re-reference the in-core SCB. | |
2321 | * To make sure we are notified during | |
2322 | * reslection, set the MK_MESSAGE flag in | |
2323 | * the card's copy of the SCB. | |
2324 | */ | |
2325 | if ((ahc->flags & AHC_PAGESCBS) == 0) { | |
2326 | ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); | |
2327 | ahc_outb(ahc, SCB_CONTROL, | |
2328 | ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); | |
2329 | } | |
2330 | ||
2331 | /* | |
2332 | * Clear out any entries in the QINFIFO first | |
2333 | * so we are the next SCB for this target | |
2334 | * to run. | |
2335 | */ | |
2336 | ahc_search_qinfifo(ahc, cmd->device->id, | |
2337 | cmd->device->channel + 'A', | |
2338 | cmd->device->lun, SCB_LIST_NULL, | |
2339 | ROLE_INITIATOR, CAM_REQUEUE_REQ, | |
2340 | SEARCH_COMPLETE); | |
2341 | ahc_qinfifo_requeue_tail(ahc, pending_scb); | |
2342 | ahc_outb(ahc, SCBPTR, saved_scbptr); | |
2343 | ahc_print_path(ahc, pending_scb); | |
2344 | printf("Device is disconnected, re-queuing SCB\n"); | |
2345 | wait = TRUE; | |
2346 | } else { | |
2347 | printf("%s:%d:%d:%d: Unable to deliver message\n", | |
2348 | ahc_name(ahc), cmd->device->channel, cmd->device->id, | |
2349 | cmd->device->lun); | |
2350 | retval = FAILED; | |
2351 | goto done; | |
2352 | } | |
2353 | ||
2354 | no_cmd: | |
2355 | /* | |
2356 | * Our assumption is that if we don't have the command, no | |
2357 | * recovery action was required, so we return success. Again, | |
2358 | * the semantics of the mid-layer recovery engine are not | |
2359 | * well defined, so this may change in time. | |
2360 | */ | |
2361 | retval = SUCCESS; | |
2362 | done: | |
2363 | if (paused) | |
2364 | ahc_unpause(ahc); | |
2365 | if (wait) { | |
2366 | struct timer_list timer; | |
2367 | int ret; | |
2368 | ||
2369 | ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE; | |
2370 | spin_unlock_irq(&ahc->platform_data->spin_lock); | |
2371 | init_timer(&timer); | |
2372 | timer.data = (u_long)ahc; | |
2373 | timer.expires = jiffies + (5 * HZ); | |
2374 | timer.function = ahc_linux_sem_timeout; | |
2375 | add_timer(&timer); | |
2376 | printf("Recovery code sleeping\n"); | |
2377 | down(&ahc->platform_data->eh_sem); | |
2378 | printf("Recovery code awake\n"); | |
2379 | ret = del_timer_sync(&timer); | |
2380 | if (ret == 0) { | |
2381 | printf("Timer Expired\n"); | |
2382 | retval = FAILED; | |
2383 | } | |
2384 | spin_lock_irq(&ahc->platform_data->spin_lock); | |
2385 | } | |
8fa728a2 JG |
2386 | |
2387 | spin_unlock_irq(&ahc->platform_data->spin_lock); | |
1da177e4 LT |
2388 | return (retval); |
2389 | } | |
2390 | ||
2391 | void | |
2392 | ahc_platform_dump_card_state(struct ahc_softc *ahc) | |
2393 | { | |
1da177e4 LT |
2394 | } |
2395 | ||
fad01ef8 JB |
2396 | static void ahc_linux_set_width(struct scsi_target *starget, int width) |
2397 | { | |
2398 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2399 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2400 | struct ahc_devinfo devinfo; | |
2401 | unsigned long flags; | |
2402 | ||
2403 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2404 | starget->channel + 'A', ROLE_INITIATOR); | |
2405 | ahc_lock(ahc, &flags); | |
2406 | ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); | |
2407 | ahc_unlock(ahc, &flags); | |
2408 | } | |
2409 | ||
92d161c3 | 2410 | static void ahc_linux_set_period(struct scsi_target *starget, int period) |
2411 | { | |
2412 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2413 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2414 | struct ahc_tmode_tstate *tstate; | |
2415 | struct ahc_initiator_tinfo *tinfo | |
2416 | = ahc_fetch_transinfo(ahc, | |
2417 | starget->channel + 'A', | |
2418 | shost->this_id, starget->id, &tstate); | |
2419 | struct ahc_devinfo devinfo; | |
597487b9 | 2420 | unsigned int ppr_options = tinfo->goal.ppr_options; |
92d161c3 | 2421 | unsigned long flags; |
597487b9 | 2422 | unsigned long offset = tinfo->goal.offset; |
92d161c3 | 2423 | struct ahc_syncrate *syncrate; |
2424 | ||
2425 | if (offset == 0) | |
2426 | offset = MAX_OFFSET; | |
2427 | ||
2bf2c568 JB |
2428 | if (period < 9) |
2429 | period = 9; /* 12.5ns is our minimum */ | |
2430 | if (period == 9) | |
2431 | ppr_options |= MSG_EXT_PPR_DT_REQ; | |
2432 | ||
92d161c3 | 2433 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
2434 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 JB |
2435 | |
2436 | /* all PPR requests apart from QAS require wide transfers */ | |
2437 | if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { | |
fad01ef8 JB |
2438 | if (spi_width(starget) == 0) |
2439 | ppr_options &= MSG_EXT_PPR_QAS_REQ; | |
2440 | } | |
2441 | ||
92d161c3 | 2442 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
2443 | ahc_lock(ahc, &flags); | |
2444 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, | |
2445 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
2446 | ahc_unlock(ahc, &flags); | |
2447 | } | |
2448 | ||
92d161c3 | 2449 | static void ahc_linux_set_offset(struct scsi_target *starget, int offset) |
2450 | { | |
2451 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2452 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2453 | struct ahc_tmode_tstate *tstate; | |
2454 | struct ahc_initiator_tinfo *tinfo | |
2455 | = ahc_fetch_transinfo(ahc, | |
2456 | starget->channel + 'A', | |
2457 | shost->this_id, starget->id, &tstate); | |
2458 | struct ahc_devinfo devinfo; | |
2459 | unsigned int ppr_options = 0; | |
2460 | unsigned int period = 0; | |
2461 | unsigned long flags; | |
2462 | struct ahc_syncrate *syncrate = NULL; | |
2463 | ||
2464 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2465 | starget->channel + 'A', ROLE_INITIATOR); | |
2466 | if (offset != 0) { | |
2467 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); | |
597487b9 JB |
2468 | period = tinfo->goal.period; |
2469 | ppr_options = tinfo->goal.ppr_options; | |
92d161c3 | 2470 | } |
2471 | ahc_lock(ahc, &flags); | |
2472 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, | |
2473 | ppr_options, AHC_TRANS_GOAL, FALSE); | |
2474 | ahc_unlock(ahc, &flags); | |
2475 | } | |
2476 | ||
92d161c3 | 2477 | static void ahc_linux_set_dt(struct scsi_target *starget, int dt) |
2478 | { | |
2479 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2480 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2481 | struct ahc_tmode_tstate *tstate; | |
2482 | struct ahc_initiator_tinfo *tinfo | |
2483 | = ahc_fetch_transinfo(ahc, | |
2484 | starget->channel + 'A', | |
2485 | shost->this_id, starget->id, &tstate); | |
2486 | struct ahc_devinfo devinfo; | |
597487b9 | 2487 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2488 | & ~MSG_EXT_PPR_DT_REQ; |
597487b9 | 2489 | unsigned int period = tinfo->goal.period; |
84e66ee7 | 2490 | unsigned int width = tinfo->goal.width; |
92d161c3 | 2491 | unsigned long flags; |
2492 | struct ahc_syncrate *syncrate; | |
2493 | ||
2bf2c568 | 2494 | if (dt) { |
2bf2c568 | 2495 | ppr_options |= MSG_EXT_PPR_DT_REQ; |
84e66ee7 JB |
2496 | if (!width) |
2497 | ahc_linux_set_width(starget, 1); | |
2498 | } else if (period == 9) | |
2bf2c568 JB |
2499 | period = 10; /* if resetting DT, period must be >= 25ns */ |
2500 | ||
92d161c3 | 2501 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
2502 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2503 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); |
92d161c3 | 2504 | ahc_lock(ahc, &flags); |
597487b9 | 2505 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 | 2506 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2507 | ahc_unlock(ahc, &flags); | |
2508 | } | |
2509 | ||
ace4e718 JB |
2510 | #if 0 |
2511 | /* FIXME: This code claims to support IU and QAS. However, the actual | |
2512 | * sequencer code and aic7xxx_core have no support for these parameters and | |
2513 | * will get into a bad state if they're negotiated. Do not enable this | |
2514 | * unless you know what you're doing */ | |
92d161c3 | 2515 | static void ahc_linux_set_qas(struct scsi_target *starget, int qas) |
2516 | { | |
2517 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2518 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2519 | struct ahc_tmode_tstate *tstate; | |
2520 | struct ahc_initiator_tinfo *tinfo | |
2521 | = ahc_fetch_transinfo(ahc, | |
2522 | starget->channel + 'A', | |
2523 | shost->this_id, starget->id, &tstate); | |
2524 | struct ahc_devinfo devinfo; | |
597487b9 | 2525 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2526 | & ~MSG_EXT_PPR_QAS_REQ; |
597487b9 | 2527 | unsigned int period = tinfo->goal.period; |
92d161c3 | 2528 | unsigned long flags; |
2529 | struct ahc_syncrate *syncrate; | |
2530 | ||
2531 | if (qas) | |
2532 | ppr_options |= MSG_EXT_PPR_QAS_REQ; | |
2533 | ||
2534 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2535 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2536 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
92d161c3 | 2537 | ahc_lock(ahc, &flags); |
597487b9 | 2538 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 | 2539 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2540 | ahc_unlock(ahc, &flags); | |
2541 | } | |
2542 | ||
92d161c3 | 2543 | static void ahc_linux_set_iu(struct scsi_target *starget, int iu) |
2544 | { | |
2545 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
2546 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); | |
2547 | struct ahc_tmode_tstate *tstate; | |
2548 | struct ahc_initiator_tinfo *tinfo | |
2549 | = ahc_fetch_transinfo(ahc, | |
2550 | starget->channel + 'A', | |
2551 | shost->this_id, starget->id, &tstate); | |
2552 | struct ahc_devinfo devinfo; | |
597487b9 | 2553 | unsigned int ppr_options = tinfo->goal.ppr_options |
92d161c3 | 2554 | & ~MSG_EXT_PPR_IU_REQ; |
597487b9 | 2555 | unsigned int period = tinfo->goal.period; |
92d161c3 | 2556 | unsigned long flags; |
2557 | struct ahc_syncrate *syncrate; | |
2558 | ||
2559 | if (iu) | |
2560 | ppr_options |= MSG_EXT_PPR_IU_REQ; | |
2561 | ||
2562 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, | |
2563 | starget->channel + 'A', ROLE_INITIATOR); | |
fad01ef8 | 2564 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
92d161c3 | 2565 | ahc_lock(ahc, &flags); |
597487b9 | 2566 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
92d161c3 | 2567 | ppr_options, AHC_TRANS_GOAL, FALSE); |
2568 | ahc_unlock(ahc, &flags); | |
2569 | } | |
ace4e718 | 2570 | #endif |
92d161c3 | 2571 | |
2572 | static struct spi_function_template ahc_linux_transport_functions = { | |
92d161c3 | 2573 | .set_offset = ahc_linux_set_offset, |
2574 | .show_offset = 1, | |
92d161c3 | 2575 | .set_period = ahc_linux_set_period, |
2576 | .show_period = 1, | |
92d161c3 | 2577 | .set_width = ahc_linux_set_width, |
2578 | .show_width = 1, | |
92d161c3 | 2579 | .set_dt = ahc_linux_set_dt, |
2580 | .show_dt = 1, | |
ace4e718 | 2581 | #if 0 |
92d161c3 | 2582 | .set_iu = ahc_linux_set_iu, |
2583 | .show_iu = 1, | |
92d161c3 | 2584 | .set_qas = ahc_linux_set_qas, |
2585 | .show_qas = 1, | |
ace4e718 | 2586 | #endif |
92d161c3 | 2587 | }; |
2588 | ||
2589 | ||
2590 | ||
1da177e4 LT |
2591 | static int __init |
2592 | ahc_linux_init(void) | |
2593 | { | |
dfd287f6 CH |
2594 | /* |
2595 | * If we've been passed any parameters, process them now. | |
2596 | */ | |
2597 | if (aic7xxx) | |
2598 | aic7xxx_setup(aic7xxx); | |
2599 | ||
2600 | ahc_linux_transport_template = | |
2601 | spi_attach_transport(&ahc_linux_transport_functions); | |
92d161c3 | 2602 | if (!ahc_linux_transport_template) |
2603 | return -ENODEV; | |
dfd287f6 | 2604 | |
b1abb4d6 JB |
2605 | scsi_transport_reserve_target(ahc_linux_transport_template, |
2606 | sizeof(struct ahc_linux_target)); | |
2607 | scsi_transport_reserve_device(ahc_linux_transport_template, | |
2608 | sizeof(struct ahc_linux_device)); | |
dfd287f6 | 2609 | |
dfd287f6 CH |
2610 | ahc_linux_pci_init(); |
2611 | ahc_linux_eisa_init(); | |
2612 | return 0; | |
1da177e4 LT |
2613 | } |
2614 | ||
2615 | static void | |
2616 | ahc_linux_exit(void) | |
2617 | { | |
1da177e4 LT |
2618 | ahc_linux_pci_exit(); |
2619 | ahc_linux_eisa_exit(); | |
92d161c3 | 2620 | spi_release_transport(ahc_linux_transport_template); |
1da177e4 LT |
2621 | } |
2622 | ||
2623 | module_init(ahc_linux_init); | |
2624 | module_exit(ahc_linux_exit); |