projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
[SCSI] aic7xxx: Update Maintainer information
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / aic7xxx / aic7xxx_osm.c
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>
125
126 static struct scsi_transport_template *ahc_linux_transport_template = NULL;
127
128 #include <linux/init.h> /* __setup */
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
133
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
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
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
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
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 static uint32_t aic7xxx_periodic_otag;
332
333 /*
334 * Module information and settable options.
335 */
336 static char *aic7xxx = NULL;
337
338 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
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 " tag_info:<tag_str> Set per-target tag depth\n"
357 " global_tag_depth:<int> Global tag depth for every target\n"
358 " on every bus\n"
359 " seltime:<int> Selection Timeout\n"
360 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
361 "\n"
362 " Sample /etc/modprobe.conf line:\n"
363 " Toggle EISA/VLB probing\n"
364 " Set tag depth on Controller 1/Target 1 to 10 tags\n"
365 " Shorten the selection timeout to 128ms\n"
366 "\n"
367 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
368 );
369
370 static void ahc_linux_handle_scsi_status(struct ahc_softc *,
371 struct scsi_device *,
372 struct scb *);
373 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
374 struct scsi_cmnd *cmd);
375 static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
376 static void ahc_linux_release_simq(struct ahc_softc *ahc);
377 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
378 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
379 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
380 struct ahc_devinfo *devinfo);
381 static void ahc_linux_device_queue_depth(struct scsi_device *);
382 static int ahc_linux_run_command(struct ahc_softc*,
383 struct ahc_linux_device *,
384 struct scsi_cmnd *);
385 static void ahc_linux_setup_tag_info_global(char *p);
386 static int aic7xxx_setup(char *s);
387
388 static int ahc_linux_unit;
389
390
391 /********************************* Inlines ************************************/
392 static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
393
394 static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
395 struct ahc_dma_seg *sg,
396 dma_addr_t addr, bus_size_t len);
397
398 static __inline void
399 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
400 {
401 struct scsi_cmnd *cmd;
402
403 cmd = scb->io_ctx;
404 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
405
406 scsi_dma_unmap(cmd);
407 }
408
409 static __inline int
410 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
411 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
412 {
413 int consumed;
414
415 if ((scb->sg_count + 1) > AHC_NSEG)
416 panic("Too few segs for dma mapping. "
417 "Increase AHC_NSEG\n");
418
419 consumed = 1;
420 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
421 scb->platform_data->xfer_len += len;
422
423 if (sizeof(dma_addr_t) > 4
424 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
425 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
426
427 sg->len = ahc_htole32(len);
428 return (consumed);
429 }
430
431 /*
432 * Return a string describing the driver.
433 */
434 static const char *
435 ahc_linux_info(struct Scsi_Host *host)
436 {
437 static char buffer[512];
438 char ahc_info[256];
439 char *bp;
440 struct ahc_softc *ahc;
441
442 bp = &buffer[0];
443 ahc = *(struct ahc_softc **)host->hostdata;
444 memset(bp, 0, sizeof(buffer));
445 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
446 strcat(bp, AIC7XXX_DRIVER_VERSION);
447 strcat(bp, "\n");
448 strcat(bp, " <");
449 strcat(bp, ahc->description);
450 strcat(bp, ">\n");
451 strcat(bp, " ");
452 ahc_controller_info(ahc, ahc_info);
453 strcat(bp, ahc_info);
454 strcat(bp, "\n");
455
456 return (bp);
457 }
458
459 /*
460 * Queue an SCB to the controller.
461 */
462 static int
463 ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
464 {
465 struct ahc_softc *ahc;
466 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
467 int rtn = SCSI_MLQUEUE_HOST_BUSY;
468 unsigned long flags;
469
470 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
471
472 ahc_lock(ahc, &flags);
473 if (ahc->platform_data->qfrozen == 0) {
474 cmd->scsi_done = scsi_done;
475 cmd->result = CAM_REQ_INPROG << 16;
476 rtn = ahc_linux_run_command(ahc, dev, cmd);
477 }
478 ahc_unlock(ahc, &flags);
479
480 return rtn;
481 }
482
483 static inline struct scsi_target **
484 ahc_linux_target_in_softc(struct scsi_target *starget)
485 {
486 struct ahc_softc *ahc =
487 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
488 unsigned int target_offset;
489
490 target_offset = starget->id;
491 if (starget->channel != 0)
492 target_offset += 8;
493
494 return &ahc->platform_data->starget[target_offset];
495 }
496
497 static int
498 ahc_linux_target_alloc(struct scsi_target *starget)
499 {
500 struct ahc_softc *ahc =
501 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
502 struct seeprom_config *sc = ahc->seep_config;
503 unsigned long flags;
504 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
505 unsigned short scsirate;
506 struct ahc_devinfo devinfo;
507 struct ahc_initiator_tinfo *tinfo;
508 struct ahc_tmode_tstate *tstate;
509 char channel = starget->channel + 'A';
510 unsigned int our_id = ahc->our_id;
511 unsigned int target_offset;
512
513 target_offset = starget->id;
514 if (starget->channel != 0)
515 target_offset += 8;
516
517 if (starget->channel)
518 our_id = ahc->our_id_b;
519
520 ahc_lock(ahc, &flags);
521
522 BUG_ON(*ahc_targp != NULL);
523
524 *ahc_targp = starget;
525
526 if (sc) {
527 int maxsync = AHC_SYNCRATE_DT;
528 int ultra = 0;
529 int flags = sc->device_flags[target_offset];
530
531 if (ahc->flags & AHC_NEWEEPROM_FMT) {
532 if (flags & CFSYNCHISULTRA)
533 ultra = 1;
534 } else if (flags & CFULTRAEN)
535 ultra = 1;
536 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
537 * change it to ultra=0, CFXFER = 0 */
538 if(ultra && (flags & CFXFER) == 0x04) {
539 ultra = 0;
540 flags &= ~CFXFER;
541 }
542
543 if ((ahc->features & AHC_ULTRA2) != 0) {
544 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
545 } else {
546 scsirate = (flags & CFXFER) << 4;
547 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
548 AHC_SYNCRATE_FAST;
549 }
550 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
551 if (!(flags & CFSYNCH))
552 spi_max_offset(starget) = 0;
553 spi_min_period(starget) =
554 ahc_find_period(ahc, scsirate, maxsync);
555
556 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
557 starget->id, &tstate);
558 }
559 ahc_compile_devinfo(&devinfo, our_id, starget->id,
560 CAM_LUN_WILDCARD, channel,
561 ROLE_INITIATOR);
562 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
563 AHC_TRANS_GOAL, /*paused*/FALSE);
564 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
565 AHC_TRANS_GOAL, /*paused*/FALSE);
566 ahc_unlock(ahc, &flags);
567
568 return 0;
569 }
570
571 static void
572 ahc_linux_target_destroy(struct scsi_target *starget)
573 {
574 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
575
576 *ahc_targp = NULL;
577 }
578
579 static int
580 ahc_linux_slave_alloc(struct scsi_device *sdev)
581 {
582 struct ahc_softc *ahc =
583 *((struct ahc_softc **)sdev->host->hostdata);
584 struct scsi_target *starget = sdev->sdev_target;
585 struct ahc_linux_device *dev;
586
587 if (bootverbose)
588 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
589
590 dev = scsi_transport_device_data(sdev);
591 memset(dev, 0, sizeof(*dev));
592
593 /*
594 * We start out life using untagged
595 * transactions of which we allow one.
596 */
597 dev->openings = 1;
598
599 /*
600 * Set maxtags to 0. This will be changed if we
601 * later determine that we are dealing with
602 * a tagged queuing capable device.
603 */
604 dev->maxtags = 0;
605
606 spi_period(starget) = 0;
607
608 return 0;
609 }
610
611 static int
612 ahc_linux_slave_configure(struct scsi_device *sdev)
613 {
614 struct ahc_softc *ahc;
615
616 ahc = *((struct ahc_softc **)sdev->host->hostdata);
617
618 if (bootverbose)
619 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
620
621 ahc_linux_device_queue_depth(sdev);
622
623 /* Initial Domain Validation */
624 if (!spi_initial_dv(sdev->sdev_target))
625 spi_dv_device(sdev);
626
627 return 0;
628 }
629
630 #if defined(__i386__)
631 /*
632 * Return the disk geometry for the given SCSI device.
633 */
634 static int
635 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
636 sector_t capacity, int geom[])
637 {
638 uint8_t *bh;
639 int heads;
640 int sectors;
641 int cylinders;
642 int ret;
643 int extended;
644 struct ahc_softc *ahc;
645 u_int channel;
646
647 ahc = *((struct ahc_softc **)sdev->host->hostdata);
648 channel = sdev_channel(sdev);
649
650 bh = scsi_bios_ptable(bdev);
651 if (bh) {
652 ret = scsi_partsize(bh, capacity,
653 &geom[2], &geom[0], &geom[1]);
654 kfree(bh);
655 if (ret != -1)
656 return (ret);
657 }
658 heads = 64;
659 sectors = 32;
660 cylinders = aic_sector_div(capacity, heads, sectors);
661
662 if (aic7xxx_extended != 0)
663 extended = 1;
664 else if (channel == 0)
665 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
666 else
667 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
668 if (extended && cylinders >= 1024) {
669 heads = 255;
670 sectors = 63;
671 cylinders = aic_sector_div(capacity, heads, sectors);
672 }
673 geom[0] = heads;
674 geom[1] = sectors;
675 geom[2] = cylinders;
676 return (0);
677 }
678 #endif
679
680 /*
681 * Abort the current SCSI command(s).
682 */
683 static int
684 ahc_linux_abort(struct scsi_cmnd *cmd)
685 {
686 int error;
687
688 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
689 if (error != 0)
690 printf("aic7xxx_abort returns 0x%x\n", error);
691 return (error);
692 }
693
694 /*
695 * Attempt to send a target reset message to the device that timed out.
696 */
697 static int
698 ahc_linux_dev_reset(struct scsi_cmnd *cmd)
699 {
700 int error;
701
702 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
703 if (error != 0)
704 printf("aic7xxx_dev_reset returns 0x%x\n", error);
705 return (error);
706 }
707
708 /*
709 * Reset the SCSI bus.
710 */
711 static int
712 ahc_linux_bus_reset(struct scsi_cmnd *cmd)
713 {
714 struct ahc_softc *ahc;
715 int found;
716 unsigned long flags;
717
718 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
719
720 ahc_lock(ahc, &flags);
721 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
722 /*initiate reset*/TRUE);
723 ahc_unlock(ahc, &flags);
724
725 if (bootverbose)
726 printf("%s: SCSI bus reset delivered. "
727 "%d SCBs aborted.\n", ahc_name(ahc), found);
728
729 return SUCCESS;
730 }
731
732 struct scsi_host_template aic7xxx_driver_template = {
733 .module = THIS_MODULE,
734 .name = "aic7xxx",
735 .proc_name = "aic7xxx",
736 .proc_info = ahc_linux_proc_info,
737 .info = ahc_linux_info,
738 .queuecommand = ahc_linux_queue,
739 .eh_abort_handler = ahc_linux_abort,
740 .eh_device_reset_handler = ahc_linux_dev_reset,
741 .eh_bus_reset_handler = ahc_linux_bus_reset,
742 #if defined(__i386__)
743 .bios_param = ahc_linux_biosparam,
744 #endif
745 .can_queue = AHC_MAX_QUEUE,
746 .this_id = -1,
747 .max_sectors = 8192,
748 .cmd_per_lun = 2,
749 .use_clustering = ENABLE_CLUSTERING,
750 .use_sg_chaining = ENABLE_SG_CHAINING,
751 .slave_alloc = ahc_linux_slave_alloc,
752 .slave_configure = ahc_linux_slave_configure,
753 .target_alloc = ahc_linux_target_alloc,
754 .target_destroy = ahc_linux_target_destroy,
755 };
756
757 /**************************** Tasklet Handler *********************************/
758
759 /******************************** Macros **************************************/
760 #define BUILD_SCSIID(ahc, cmd) \
761 ((((cmd)->device->id << TID_SHIFT) & TID) \
762 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
763 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
764
765 /******************************** Bus DMA *************************************/
766 int
767 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
768 bus_size_t alignment, bus_size_t boundary,
769 dma_addr_t lowaddr, dma_addr_t highaddr,
770 bus_dma_filter_t *filter, void *filterarg,
771 bus_size_t maxsize, int nsegments,
772 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
773 {
774 bus_dma_tag_t dmat;
775
776 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
777 if (dmat == NULL)
778 return (ENOMEM);
779
780 /*
781 * Linux is very simplistic about DMA memory. For now don't
782 * maintain all specification information. Once Linux supplies
783 * better facilities for doing these operations, or the
784 * needs of this particular driver change, we might need to do
785 * more here.
786 */
787 dmat->alignment = alignment;
788 dmat->boundary = boundary;
789 dmat->maxsize = maxsize;
790 *ret_tag = dmat;
791 return (0);
792 }
793
794 void
795 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
796 {
797 free(dmat, M_DEVBUF);
798 }
799
800 int
801 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
802 int flags, bus_dmamap_t *mapp)
803 {
804 *vaddr = pci_alloc_consistent(ahc->dev_softc,
805 dmat->maxsize, mapp);
806 if (*vaddr == NULL)
807 return ENOMEM;
808 return 0;
809 }
810
811 void
812 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
813 void* vaddr, bus_dmamap_t map)
814 {
815 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
816 vaddr, map);
817 }
818
819 int
820 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
821 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
822 void *cb_arg, int flags)
823 {
824 /*
825 * Assume for now that this will only be used during
826 * initialization and not for per-transaction buffer mapping.
827 */
828 bus_dma_segment_t stack_sg;
829
830 stack_sg.ds_addr = map;
831 stack_sg.ds_len = dmat->maxsize;
832 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
833 return (0);
834 }
835
836 void
837 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
838 {
839 }
840
841 int
842 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
843 {
844 /* Nothing to do */
845 return (0);
846 }
847
848 static void
849 ahc_linux_setup_tag_info_global(char *p)
850 {
851 int tags, i, j;
852
853 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
854 printf("Setting Global Tags= %d\n", tags);
855
856 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
857 for (j = 0; j < AHC_NUM_TARGETS; j++) {
858 aic7xxx_tag_info[i].tag_commands[j] = tags;
859 }
860 }
861 }
862
863 static void
864 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
865 {
866
867 if ((instance >= 0) && (targ >= 0)
868 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
869 && (targ < AHC_NUM_TARGETS)) {
870 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
871 if (bootverbose)
872 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
873 }
874 }
875
876 static char *
877 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
878 void (*callback)(u_long, int, int, int32_t),
879 u_long callback_arg)
880 {
881 char *tok_end;
882 char *tok_end2;
883 int i;
884 int instance;
885 int targ;
886 int done;
887 char tok_list[] = {'.', ',', '{', '}', '\0'};
888
889 /* All options use a ':' name/arg separator */
890 if (*opt_arg != ':')
891 return (opt_arg);
892 opt_arg++;
893 instance = -1;
894 targ = -1;
895 done = FALSE;
896 /*
897 * Restore separator that may be in
898 * the middle of our option argument.
899 */
900 tok_end = strchr(opt_arg, '\0');
901 if (tok_end < end)
902 *tok_end = ',';
903 while (!done) {
904 switch (*opt_arg) {
905 case '{':
906 if (instance == -1) {
907 instance = 0;
908 } else {
909 if (depth > 1) {
910 if (targ == -1)
911 targ = 0;
912 } else {
913 printf("Malformed Option %s\n",
914 opt_name);
915 done = TRUE;
916 }
917 }
918 opt_arg++;
919 break;
920 case '}':
921 if (targ != -1)
922 targ = -1;
923 else if (instance != -1)
924 instance = -1;
925 opt_arg++;
926 break;
927 case ',':
928 case '.':
929 if (instance == -1)
930 done = TRUE;
931 else if (targ >= 0)
932 targ++;
933 else if (instance >= 0)
934 instance++;
935 opt_arg++;
936 break;
937 case '\0':
938 done = TRUE;
939 break;
940 default:
941 tok_end = end;
942 for (i = 0; tok_list[i]; i++) {
943 tok_end2 = strchr(opt_arg, tok_list[i]);
944 if ((tok_end2) && (tok_end2 < tok_end))
945 tok_end = tok_end2;
946 }
947 callback(callback_arg, instance, targ,
948 simple_strtol(opt_arg, NULL, 0));
949 opt_arg = tok_end;
950 break;
951 }
952 }
953 return (opt_arg);
954 }
955
956 /*
957 * Handle Linux boot parameters. This routine allows for assigning a value
958 * to a parameter with a ':' between the parameter and the value.
959 * ie. aic7xxx=stpwlev:1,extended
960 */
961 static int
962 aic7xxx_setup(char *s)
963 {
964 int i, n;
965 char *p;
966 char *end;
967
968 static struct {
969 const char *name;
970 uint32_t *flag;
971 } options[] = {
972 { "extended", &aic7xxx_extended },
973 { "no_reset", &aic7xxx_no_reset },
974 { "verbose", &aic7xxx_verbose },
975 { "allow_memio", &aic7xxx_allow_memio},
976 #ifdef AHC_DEBUG
977 { "debug", &ahc_debug },
978 #endif
979 { "periodic_otag", &aic7xxx_periodic_otag },
980 { "pci_parity", &aic7xxx_pci_parity },
981 { "seltime", &aic7xxx_seltime },
982 { "tag_info", NULL },
983 { "global_tag_depth", NULL },
984 { "dv", NULL }
985 };
986
987 end = strchr(s, '\0');
988
989 /*
990 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
991 * will never be 0 in this case.
992 */
993 n = 0;
994
995 while ((p = strsep(&s, ",.")) != NULL) {
996 if (*p == '\0')
997 continue;
998 for (i = 0; i < ARRAY_SIZE(options); i++) {
999
1000 n = strlen(options[i].name);
1001 if (strncmp(options[i].name, p, n) == 0)
1002 break;
1003 }
1004 if (i == ARRAY_SIZE(options))
1005 continue;
1006
1007 if (strncmp(p, "global_tag_depth", n) == 0) {
1008 ahc_linux_setup_tag_info_global(p + n);
1009 } else if (strncmp(p, "tag_info", n) == 0) {
1010 s = ahc_parse_brace_option("tag_info", p + n, end,
1011 2, ahc_linux_setup_tag_info, 0);
1012 } else if (p[n] == ':') {
1013 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1014 } else if (strncmp(p, "verbose", n) == 0) {
1015 *(options[i].flag) = 1;
1016 } else {
1017 *(options[i].flag) ^= 0xFFFFFFFF;
1018 }
1019 }
1020 return 1;
1021 }
1022
1023 __setup("aic7xxx=", aic7xxx_setup);
1024
1025 uint32_t aic7xxx_verbose;
1026
1027 int
1028 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1029 {
1030 char buf[80];
1031 struct Scsi_Host *host;
1032 char *new_name;
1033 u_long s;
1034 int retval;
1035
1036 template->name = ahc->description;
1037 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1038 if (host == NULL)
1039 return (ENOMEM);
1040
1041 *((struct ahc_softc **)host->hostdata) = ahc;
1042 ahc->platform_data->host = host;
1043 host->can_queue = AHC_MAX_QUEUE;
1044 host->cmd_per_lun = 2;
1045 /* XXX No way to communicate the ID for multiple channels */
1046 host->this_id = ahc->our_id;
1047 host->irq = ahc->platform_data->irq;
1048 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1049 host->max_lun = AHC_NUM_LUNS;
1050 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1051 host->sg_tablesize = AHC_NSEG;
1052 ahc_lock(ahc, &s);
1053 ahc_set_unit(ahc, ahc_linux_unit++);
1054 ahc_unlock(ahc, &s);
1055 sprintf(buf, "scsi%d", host->host_no);
1056 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1057 if (new_name != NULL) {
1058 strcpy(new_name, buf);
1059 ahc_set_name(ahc, new_name);
1060 }
1061 host->unique_id = ahc->unit;
1062 ahc_linux_initialize_scsi_bus(ahc);
1063 ahc_intr_enable(ahc, TRUE);
1064
1065 host->transportt = ahc_linux_transport_template;
1066
1067 retval = scsi_add_host(host,
1068 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1069 if (retval) {
1070 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1071 scsi_host_put(host);
1072 return retval;
1073 }
1074
1075 scsi_scan_host(host);
1076 return 0;
1077 }
1078
1079 /*
1080 * Place the SCSI bus into a known state by either resetting it,
1081 * or forcing transfer negotiations on the next command to any
1082 * target.
1083 */
1084 void
1085 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1086 {
1087 int i;
1088 int numtarg;
1089 unsigned long s;
1090
1091 i = 0;
1092 numtarg = 0;
1093
1094 ahc_lock(ahc, &s);
1095
1096 if (aic7xxx_no_reset != 0)
1097 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1098
1099 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1100 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1101 else
1102 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1103
1104 if ((ahc->features & AHC_TWIN) != 0) {
1105
1106 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1107 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1108 } else {
1109 if (numtarg == 0)
1110 i = 8;
1111 numtarg += 8;
1112 }
1113 }
1114
1115 /*
1116 * Force negotiation to async for all targets that
1117 * will not see an initial bus reset.
1118 */
1119 for (; i < numtarg; i++) {
1120 struct ahc_devinfo devinfo;
1121 struct ahc_initiator_tinfo *tinfo;
1122 struct ahc_tmode_tstate *tstate;
1123 u_int our_id;
1124 u_int target_id;
1125 char channel;
1126
1127 channel = 'A';
1128 our_id = ahc->our_id;
1129 target_id = i;
1130 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1131 channel = 'B';
1132 our_id = ahc->our_id_b;
1133 target_id = i % 8;
1134 }
1135 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1136 target_id, &tstate);
1137 ahc_compile_devinfo(&devinfo, our_id, target_id,
1138 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1139 ahc_update_neg_request(ahc, &devinfo, tstate,
1140 tinfo, AHC_NEG_ALWAYS);
1141 }
1142 ahc_unlock(ahc, &s);
1143 /* Give the bus some time to recover */
1144 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1145 ahc_linux_freeze_simq(ahc);
1146 msleep(AIC7XXX_RESET_DELAY);
1147 ahc_linux_release_simq(ahc);
1148 }
1149 }
1150
1151 int
1152 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1153 {
1154
1155 ahc->platform_data =
1156 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1157 if (ahc->platform_data == NULL)
1158 return (ENOMEM);
1159 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1160 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1161 ahc_lockinit(ahc);
1162 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1163 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1164 if (aic7xxx_pci_parity == 0)
1165 ahc->flags |= AHC_DISABLE_PCI_PERR;
1166
1167 return (0);
1168 }
1169
1170 void
1171 ahc_platform_free(struct ahc_softc *ahc)
1172 {
1173 struct scsi_target *starget;
1174 int i;
1175
1176 if (ahc->platform_data != NULL) {
1177 /* destroy all of the device and target objects */
1178 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1179 starget = ahc->platform_data->starget[i];
1180 if (starget != NULL) {
1181 ahc->platform_data->starget[i] = NULL;
1182 }
1183 }
1184
1185 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1186 free_irq(ahc->platform_data->irq, ahc);
1187 if (ahc->tag == BUS_SPACE_PIO
1188 && ahc->bsh.ioport != 0)
1189 release_region(ahc->bsh.ioport, 256);
1190 if (ahc->tag == BUS_SPACE_MEMIO
1191 && ahc->bsh.maddr != NULL) {
1192 iounmap(ahc->bsh.maddr);
1193 release_mem_region(ahc->platform_data->mem_busaddr,
1194 0x1000);
1195 }
1196
1197 if (ahc->platform_data->host)
1198 scsi_host_put(ahc->platform_data->host);
1199
1200 free(ahc->platform_data, M_DEVBUF);
1201 }
1202 }
1203
1204 void
1205 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1206 {
1207 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1208 SCB_GET_CHANNEL(ahc, scb),
1209 SCB_GET_LUN(scb), SCB_LIST_NULL,
1210 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1211 }
1212
1213 void
1214 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1215 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1216 {
1217 struct ahc_linux_device *dev;
1218 int was_queuing;
1219 int now_queuing;
1220
1221 if (sdev == NULL)
1222 return;
1223 dev = scsi_transport_device_data(sdev);
1224
1225 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1226 switch (alg) {
1227 default:
1228 case AHC_QUEUE_NONE:
1229 now_queuing = 0;
1230 break;
1231 case AHC_QUEUE_BASIC:
1232 now_queuing = AHC_DEV_Q_BASIC;
1233 break;
1234 case AHC_QUEUE_TAGGED:
1235 now_queuing = AHC_DEV_Q_TAGGED;
1236 break;
1237 }
1238 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1239 && (was_queuing != now_queuing)
1240 && (dev->active != 0)) {
1241 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1242 dev->qfrozen++;
1243 }
1244
1245 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1246 if (now_queuing) {
1247 u_int usertags;
1248
1249 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1250 if (!was_queuing) {
1251 /*
1252 * Start out agressively and allow our
1253 * dynamic queue depth algorithm to take
1254 * care of the rest.
1255 */
1256 dev->maxtags = usertags;
1257 dev->openings = dev->maxtags - dev->active;
1258 }
1259 if (dev->maxtags == 0) {
1260 /*
1261 * Queueing is disabled by the user.
1262 */
1263 dev->openings = 1;
1264 } else if (alg == AHC_QUEUE_TAGGED) {
1265 dev->flags |= AHC_DEV_Q_TAGGED;
1266 if (aic7xxx_periodic_otag != 0)
1267 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1268 } else
1269 dev->flags |= AHC_DEV_Q_BASIC;
1270 } else {
1271 /* We can only have one opening. */
1272 dev->maxtags = 0;
1273 dev->openings = 1 - dev->active;
1274 }
1275 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1276 case AHC_DEV_Q_BASIC:
1277 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1278 scsi_activate_tcq(sdev, dev->openings + dev->active);
1279 break;
1280 case AHC_DEV_Q_TAGGED:
1281 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
1282 scsi_activate_tcq(sdev, dev->openings + dev->active);
1283 break;
1284 default:
1285 /*
1286 * We allow the OS to queue 2 untagged transactions to
1287 * us at any time even though we can only execute them
1288 * serially on the controller/device. This should
1289 * remove some latency.
1290 */
1291 scsi_deactivate_tcq(sdev, 2);
1292 break;
1293 }
1294 }
1295
1296 int
1297 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1298 int lun, u_int tag, role_t role, uint32_t status)
1299 {
1300 return 0;
1301 }
1302
1303 static u_int
1304 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1305 {
1306 static int warned_user;
1307 u_int tags;
1308
1309 tags = 0;
1310 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1311 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
1312 if (warned_user == 0) {
1313
1314 printf(KERN_WARNING
1315 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1316 "aic7xxx: for installed controllers. Using defaults\n"
1317 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1318 "aic7xxx: the aic7xxx_osm..c source file.\n");
1319 warned_user++;
1320 }
1321 tags = AHC_MAX_QUEUE;
1322 } else {
1323 adapter_tag_info_t *tag_info;
1324
1325 tag_info = &aic7xxx_tag_info[ahc->unit];
1326 tags = tag_info->tag_commands[devinfo->target_offset];
1327 if (tags > AHC_MAX_QUEUE)
1328 tags = AHC_MAX_QUEUE;
1329 }
1330 }
1331 return (tags);
1332 }
1333
1334 /*
1335 * Determines the queue depth for a given device.
1336 */
1337 static void
1338 ahc_linux_device_queue_depth(struct scsi_device *sdev)
1339 {
1340 struct ahc_devinfo devinfo;
1341 u_int tags;
1342 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1343
1344 ahc_compile_devinfo(&devinfo,
1345 sdev->sdev_target->channel == 0
1346 ? ahc->our_id : ahc->our_id_b,
1347 sdev->sdev_target->id, sdev->lun,
1348 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1349 ROLE_INITIATOR);
1350 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1351 if (tags != 0 && sdev->tagged_supported != 0) {
1352
1353 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1354 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1355 devinfo.lun, AC_TRANSFER_NEG);
1356 ahc_print_devinfo(ahc, &devinfo);
1357 printf("Tagged Queuing enabled. Depth %d\n", tags);
1358 } else {
1359 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1360 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1361 devinfo.lun, AC_TRANSFER_NEG);
1362 }
1363 }
1364
1365 static int
1366 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1367 struct scsi_cmnd *cmd)
1368 {
1369 struct scb *scb;
1370 struct hardware_scb *hscb;
1371 struct ahc_initiator_tinfo *tinfo;
1372 struct ahc_tmode_tstate *tstate;
1373 uint16_t mask;
1374 struct scb_tailq *untagged_q = NULL;
1375 int nseg;
1376
1377 /*
1378 * Schedule us to run later. The only reason we are not
1379 * running is because the whole controller Q is frozen.
1380 */
1381 if (ahc->platform_data->qfrozen != 0)
1382 return SCSI_MLQUEUE_HOST_BUSY;
1383
1384 /*
1385 * We only allow one untagged transaction
1386 * per target in the initiator role unless
1387 * we are storing a full busy target *lun*
1388 * table in SCB space.
1389 */
1390 if (!blk_rq_tagged(cmd->request)
1391 && (ahc->features & AHC_SCB_BTT) == 0) {
1392 int target_offset;
1393
1394 target_offset = cmd->device->id + cmd->device->channel * 8;
1395 untagged_q = &(ahc->untagged_queues[target_offset]);
1396 if (!TAILQ_EMPTY(untagged_q))
1397 /* if we're already executing an untagged command
1398 * we're busy to another */
1399 return SCSI_MLQUEUE_DEVICE_BUSY;
1400 }
1401
1402 /*
1403 * Get an scb to use.
1404 */
1405 scb = ahc_get_scb(ahc);
1406 if (!scb)
1407 return SCSI_MLQUEUE_HOST_BUSY;
1408
1409 scb->io_ctx = cmd;
1410 scb->platform_data->dev = dev;
1411 hscb = scb->hscb;
1412 cmd->host_scribble = (char *)scb;
1413
1414 /*
1415 * Fill out basics of the HSCB.
1416 */
1417 hscb->control = 0;
1418 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1419 hscb->lun = cmd->device->lun;
1420 mask = SCB_GET_TARGET_MASK(ahc, scb);
1421 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1422 SCB_GET_OUR_ID(scb),
1423 SCB_GET_TARGET(ahc, scb), &tstate);
1424 hscb->scsirate = tinfo->scsirate;
1425 hscb->scsioffset = tinfo->curr.offset;
1426 if ((tstate->ultraenb & mask) != 0)
1427 hscb->control |= ULTRAENB;
1428
1429 if ((ahc->user_discenable & mask) != 0)
1430 hscb->control |= DISCENB;
1431
1432 if ((tstate->auto_negotiate & mask) != 0) {
1433 scb->flags |= SCB_AUTO_NEGOTIATE;
1434 scb->hscb->control |= MK_MESSAGE;
1435 }
1436
1437 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1438 int msg_bytes;
1439 uint8_t tag_msgs[2];
1440
1441 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1442 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1443 hscb->control |= tag_msgs[0];
1444 if (tag_msgs[0] == MSG_ORDERED_TASK)
1445 dev->commands_since_idle_or_otag = 0;
1446 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1447 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1448 hscb->control |= MSG_ORDERED_TASK;
1449 dev->commands_since_idle_or_otag = 0;
1450 } else {
1451 hscb->control |= MSG_SIMPLE_TASK;
1452 }
1453 }
1454
1455 hscb->cdb_len = cmd->cmd_len;
1456 if (hscb->cdb_len <= 12) {
1457 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1458 } else {
1459 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1460 scb->flags |= SCB_CDB32_PTR;
1461 }
1462
1463 scb->platform_data->xfer_len = 0;
1464 ahc_set_residual(scb, 0);
1465 ahc_set_sense_residual(scb, 0);
1466 scb->sg_count = 0;
1467
1468 nseg = scsi_dma_map(cmd);
1469 BUG_ON(nseg < 0);
1470 if (nseg > 0) {
1471 struct ahc_dma_seg *sg;
1472 struct scatterlist *cur_seg;
1473 int i;
1474
1475 /* Copy the segments into the SG list. */
1476 sg = scb->sg_list;
1477 /*
1478 * The sg_count may be larger than nseg if
1479 * a transfer crosses a 32bit page.
1480 */
1481 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1482 dma_addr_t addr;
1483 bus_size_t len;
1484 int consumed;
1485
1486 addr = sg_dma_address(cur_seg);
1487 len = sg_dma_len(cur_seg);
1488 consumed = ahc_linux_map_seg(ahc, scb,
1489 sg, addr, len);
1490 sg += consumed;
1491 scb->sg_count += consumed;
1492 }
1493 sg--;
1494 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1495
1496 /*
1497 * Reset the sg list pointer.
1498 */
1499 scb->hscb->sgptr =
1500 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1501
1502 /*
1503 * Copy the first SG into the "current"
1504 * data pointer area.
1505 */
1506 scb->hscb->dataptr = scb->sg_list->addr;
1507 scb->hscb->datacnt = scb->sg_list->len;
1508 } else {
1509 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1510 scb->hscb->dataptr = 0;
1511 scb->hscb->datacnt = 0;
1512 scb->sg_count = 0;
1513 }
1514
1515 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1516 dev->openings--;
1517 dev->active++;
1518 dev->commands_issued++;
1519 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1520 dev->commands_since_idle_or_otag++;
1521
1522 scb->flags |= SCB_ACTIVE;
1523 if (untagged_q) {
1524 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1525 scb->flags |= SCB_UNTAGGEDQ;
1526 }
1527 ahc_queue_scb(ahc, scb);
1528 return 0;
1529 }
1530
1531 /*
1532 * SCSI controller interrupt handler.
1533 */
1534 irqreturn_t
1535 ahc_linux_isr(int irq, void *dev_id)
1536 {
1537 struct ahc_softc *ahc;
1538 u_long flags;
1539 int ours;
1540
1541 ahc = (struct ahc_softc *) dev_id;
1542 ahc_lock(ahc, &flags);
1543 ours = ahc_intr(ahc);
1544 ahc_unlock(ahc, &flags);
1545 return IRQ_RETVAL(ours);
1546 }
1547
1548 void
1549 ahc_platform_flushwork(struct ahc_softc *ahc)
1550 {
1551
1552 }
1553
1554 void
1555 ahc_send_async(struct ahc_softc *ahc, char channel,
1556 u_int target, u_int lun, ac_code code)
1557 {
1558 switch (code) {
1559 case AC_TRANSFER_NEG:
1560 {
1561 char buf[80];
1562 struct scsi_target *starget;
1563 struct ahc_linux_target *targ;
1564 struct info_str info;
1565 struct ahc_initiator_tinfo *tinfo;
1566 struct ahc_tmode_tstate *tstate;
1567 int target_offset;
1568 unsigned int target_ppr_options;
1569
1570 BUG_ON(target == CAM_TARGET_WILDCARD);
1571
1572 info.buffer = buf;
1573 info.length = sizeof(buf);
1574 info.offset = 0;
1575 info.pos = 0;
1576 tinfo = ahc_fetch_transinfo(ahc, channel,
1577 channel == 'A' ? ahc->our_id
1578 : ahc->our_id_b,
1579 target, &tstate);
1580
1581 /*
1582 * Don't bother reporting results while
1583 * negotiations are still pending.
1584 */
1585 if (tinfo->curr.period != tinfo->goal.period
1586 || tinfo->curr.width != tinfo->goal.width
1587 || tinfo->curr.offset != tinfo->goal.offset
1588 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1589 if (bootverbose == 0)
1590 break;
1591
1592 /*
1593 * Don't bother reporting results that
1594 * are identical to those last reported.
1595 */
1596 target_offset = target;
1597 if (channel == 'B')
1598 target_offset += 8;
1599 starget = ahc->platform_data->starget[target_offset];
1600 if (starget == NULL)
1601 break;
1602 targ = scsi_transport_target_data(starget);
1603
1604 target_ppr_options =
1605 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1606 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1607 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1608
1609 if (tinfo->curr.period == spi_period(starget)
1610 && tinfo->curr.width == spi_width(starget)
1611 && tinfo->curr.offset == spi_offset(starget)
1612 && tinfo->curr.ppr_options == target_ppr_options)
1613 if (bootverbose == 0)
1614 break;
1615
1616 spi_period(starget) = tinfo->curr.period;
1617 spi_width(starget) = tinfo->curr.width;
1618 spi_offset(starget) = tinfo->curr.offset;
1619 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1620 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1621 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1622 spi_display_xfer_agreement(starget);
1623 break;
1624 }
1625 case AC_SENT_BDR:
1626 {
1627 WARN_ON(lun != CAM_LUN_WILDCARD);
1628 scsi_report_device_reset(ahc->platform_data->host,
1629 channel - 'A', target);
1630 break;
1631 }
1632 case AC_BUS_RESET:
1633 if (ahc->platform_data->host != NULL) {
1634 scsi_report_bus_reset(ahc->platform_data->host,
1635 channel - 'A');
1636 }
1637 break;
1638 default:
1639 panic("ahc_send_async: Unexpected async event");
1640 }
1641 }
1642
1643 /*
1644 * Calls the higher level scsi done function and frees the scb.
1645 */
1646 void
1647 ahc_done(struct ahc_softc *ahc, struct scb *scb)
1648 {
1649 struct scsi_cmnd *cmd;
1650 struct ahc_linux_device *dev;
1651
1652 LIST_REMOVE(scb, pending_links);
1653 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1654 struct scb_tailq *untagged_q;
1655 int target_offset;
1656
1657 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1658 untagged_q = &(ahc->untagged_queues[target_offset]);
1659 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1660 BUG_ON(!TAILQ_EMPTY(untagged_q));
1661 }
1662
1663 if ((scb->flags & SCB_ACTIVE) == 0) {
1664 printf("SCB %d done'd twice\n", scb->hscb->tag);
1665 ahc_dump_card_state(ahc);
1666 panic("Stopping for safety");
1667 }
1668 cmd = scb->io_ctx;
1669 dev = scb->platform_data->dev;
1670 dev->active--;
1671 dev->openings++;
1672 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1673 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1674 dev->qfrozen--;
1675 }
1676 ahc_linux_unmap_scb(ahc, scb);
1677
1678 /*
1679 * Guard against stale sense data.
1680 * The Linux mid-layer assumes that sense
1681 * was retrieved anytime the first byte of
1682 * the sense buffer looks "sane".
1683 */
1684 cmd->sense_buffer[0] = 0;
1685 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1686 uint32_t amount_xferred;
1687
1688 amount_xferred =
1689 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1690 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1691 #ifdef AHC_DEBUG
1692 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1693 ahc_print_path(ahc, scb);
1694 printf("Set CAM_UNCOR_PARITY\n");
1695 }
1696 #endif
1697 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1698 #ifdef AHC_REPORT_UNDERFLOWS
1699 /*
1700 * This code is disabled by default as some
1701 * clients of the SCSI system do not properly
1702 * initialize the underflow parameter. This
1703 * results in spurious termination of commands
1704 * that complete as expected (e.g. underflow is
1705 * allowed as command can return variable amounts
1706 * of data.
1707 */
1708 } else if (amount_xferred < scb->io_ctx->underflow) {
1709 u_int i;
1710
1711 ahc_print_path(ahc, scb);
1712 printf("CDB:");
1713 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1714 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1715 printf("\n");
1716 ahc_print_path(ahc, scb);
1717 printf("Saw underflow (%ld of %ld bytes). "
1718 "Treated as error\n",
1719 ahc_get_residual(scb),
1720 ahc_get_transfer_length(scb));
1721 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1722 #endif
1723 } else {
1724 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1725 }
1726 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1727 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1728 }
1729
1730 if (dev->openings == 1
1731 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1732 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1733 dev->tag_success_count++;
1734 /*
1735 * Some devices deal with temporary internal resource
1736 * shortages by returning queue full. When the queue
1737 * full occurrs, we throttle back. Slowly try to get
1738 * back to our previous queue depth.
1739 */
1740 if ((dev->openings + dev->active) < dev->maxtags
1741 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1742 dev->tag_success_count = 0;
1743 dev->openings++;
1744 }
1745
1746 if (dev->active == 0)
1747 dev->commands_since_idle_or_otag = 0;
1748
1749 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1750 printf("Recovery SCB completes\n");
1751 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1752 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1753 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1754
1755 if (ahc->platform_data->eh_done)
1756 complete(ahc->platform_data->eh_done);
1757 }
1758
1759 ahc_free_scb(ahc, scb);
1760 ahc_linux_queue_cmd_complete(ahc, cmd);
1761 }
1762
1763 static void
1764 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
1765 struct scsi_device *sdev, struct scb *scb)
1766 {
1767 struct ahc_devinfo devinfo;
1768 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1769
1770 ahc_compile_devinfo(&devinfo,
1771 ahc->our_id,
1772 sdev->sdev_target->id, sdev->lun,
1773 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1774 ROLE_INITIATOR);
1775
1776 /*
1777 * We don't currently trust the mid-layer to
1778 * properly deal with queue full or busy. So,
1779 * when one occurs, we tell the mid-layer to
1780 * unconditionally requeue the command to us
1781 * so that we can retry it ourselves. We also
1782 * implement our own throttling mechanism so
1783 * we don't clobber the device with too many
1784 * commands.
1785 */
1786 switch (ahc_get_scsi_status(scb)) {
1787 default:
1788 break;
1789 case SCSI_STATUS_CHECK_COND:
1790 case SCSI_STATUS_CMD_TERMINATED:
1791 {
1792 struct scsi_cmnd *cmd;
1793
1794 /*
1795 * Copy sense information to the OS's cmd
1796 * structure if it is available.
1797 */
1798 cmd = scb->io_ctx;
1799 if (scb->flags & SCB_SENSE) {
1800 u_int sense_size;
1801
1802 sense_size = min(sizeof(struct scsi_sense_data)
1803 - ahc_get_sense_residual(scb),
1804 (u_long)sizeof(cmd->sense_buffer));
1805 memcpy(cmd->sense_buffer,
1806 ahc_get_sense_buf(ahc, scb), sense_size);
1807 if (sense_size < sizeof(cmd->sense_buffer))
1808 memset(&cmd->sense_buffer[sense_size], 0,
1809 sizeof(cmd->sense_buffer) - sense_size);
1810 cmd->result |= (DRIVER_SENSE << 24);
1811 #ifdef AHC_DEBUG
1812 if (ahc_debug & AHC_SHOW_SENSE) {
1813 int i;
1814
1815 printf("Copied %d bytes of sense data:",
1816 sense_size);
1817 for (i = 0; i < sense_size; i++) {
1818 if ((i & 0xF) == 0)
1819 printf("\n");
1820 printf("0x%x ", cmd->sense_buffer[i]);
1821 }
1822 printf("\n");
1823 }
1824 #endif
1825 }
1826 break;
1827 }
1828 case SCSI_STATUS_QUEUE_FULL:
1829 {
1830 /*
1831 * By the time the core driver has returned this
1832 * command, all other commands that were queued
1833 * to us but not the device have been returned.
1834 * This ensures that dev->active is equal to
1835 * the number of commands actually queued to
1836 * the device.
1837 */
1838 dev->tag_success_count = 0;
1839 if (dev->active != 0) {
1840 /*
1841 * Drop our opening count to the number
1842 * of commands currently outstanding.
1843 */
1844 dev->openings = 0;
1845 /*
1846 ahc_print_path(ahc, scb);
1847 printf("Dropping tag count to %d\n", dev->active);
1848 */
1849 if (dev->active == dev->tags_on_last_queuefull) {
1850
1851 dev->last_queuefull_same_count++;
1852 /*
1853 * If we repeatedly see a queue full
1854 * at the same queue depth, this
1855 * device has a fixed number of tag
1856 * slots. Lock in this tag depth
1857 * so we stop seeing queue fulls from
1858 * this device.
1859 */
1860 if (dev->last_queuefull_same_count
1861 == AHC_LOCK_TAGS_COUNT) {
1862 dev->maxtags = dev->active;
1863 ahc_print_path(ahc, scb);
1864 printf("Locking max tag count at %d\n",
1865 dev->active);
1866 }
1867 } else {
1868 dev->tags_on_last_queuefull = dev->active;
1869 dev->last_queuefull_same_count = 0;
1870 }
1871 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1872 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
1873 ahc_platform_set_tags(ahc, sdev, &devinfo,
1874 (dev->flags & AHC_DEV_Q_BASIC)
1875 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1876 break;
1877 }
1878 /*
1879 * Drop down to a single opening, and treat this
1880 * as if the target returned BUSY SCSI status.
1881 */
1882 dev->openings = 1;
1883 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
1884 ahc_platform_set_tags(ahc, sdev, &devinfo,
1885 (dev->flags & AHC_DEV_Q_BASIC)
1886 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1887 break;
1888 }
1889 }
1890 }
1891
1892 static void
1893 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1894 {
1895 /*
1896 * Map CAM error codes into Linux Error codes. We
1897 * avoid the conversion so that the DV code has the
1898 * full error information available when making
1899 * state change decisions.
1900 */
1901 {
1902 u_int new_status;
1903
1904 switch (ahc_cmd_get_transaction_status(cmd)) {
1905 case CAM_REQ_INPROG:
1906 case CAM_REQ_CMP:
1907 case CAM_SCSI_STATUS_ERROR:
1908 new_status = DID_OK;
1909 break;
1910 case CAM_REQ_ABORTED:
1911 new_status = DID_ABORT;
1912 break;
1913 case CAM_BUSY:
1914 new_status = DID_BUS_BUSY;
1915 break;
1916 case CAM_REQ_INVALID:
1917 case CAM_PATH_INVALID:
1918 new_status = DID_BAD_TARGET;
1919 break;
1920 case CAM_SEL_TIMEOUT:
1921 new_status = DID_NO_CONNECT;
1922 break;
1923 case CAM_SCSI_BUS_RESET:
1924 case CAM_BDR_SENT:
1925 new_status = DID_RESET;
1926 break;
1927 case CAM_UNCOR_PARITY:
1928 new_status = DID_PARITY;
1929 break;
1930 case CAM_CMD_TIMEOUT:
1931 new_status = DID_TIME_OUT;
1932 break;
1933 case CAM_UA_ABORT:
1934 case CAM_REQ_CMP_ERR:
1935 case CAM_AUTOSENSE_FAIL:
1936 case CAM_NO_HBA:
1937 case CAM_DATA_RUN_ERR:
1938 case CAM_UNEXP_BUSFREE:
1939 case CAM_SEQUENCE_FAIL:
1940 case CAM_CCB_LEN_ERR:
1941 case CAM_PROVIDE_FAIL:
1942 case CAM_REQ_TERMIO:
1943 case CAM_UNREC_HBA_ERROR:
1944 case CAM_REQ_TOO_BIG:
1945 new_status = DID_ERROR;
1946 break;
1947 case CAM_REQUEUE_REQ:
1948 new_status = DID_REQUEUE;
1949 break;
1950 default:
1951 /* We should never get here */
1952 new_status = DID_ERROR;
1953 break;
1954 }
1955
1956 ahc_cmd_set_transaction_status(cmd, new_status);
1957 }
1958
1959 cmd->scsi_done(cmd);
1960 }
1961
1962 static void
1963 ahc_linux_freeze_simq(struct ahc_softc *ahc)
1964 {
1965 unsigned long s;
1966
1967 ahc_lock(ahc, &s);
1968 ahc->platform_data->qfrozen++;
1969 if (ahc->platform_data->qfrozen == 1) {
1970 scsi_block_requests(ahc->platform_data->host);
1971
1972 /* XXX What about Twin channels? */
1973 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
1974 CAM_LUN_WILDCARD, SCB_LIST_NULL,
1975 ROLE_INITIATOR, CAM_REQUEUE_REQ);
1976 }
1977 ahc_unlock(ahc, &s);
1978 }
1979
1980 static void
1981 ahc_linux_release_simq(struct ahc_softc *ahc)
1982 {
1983 u_long s;
1984 int unblock_reqs;
1985
1986 unblock_reqs = 0;
1987 ahc_lock(ahc, &s);
1988 if (ahc->platform_data->qfrozen > 0)
1989 ahc->platform_data->qfrozen--;
1990 if (ahc->platform_data->qfrozen == 0)
1991 unblock_reqs = 1;
1992 ahc_unlock(ahc, &s);
1993 /*
1994 * There is still a race here. The mid-layer
1995 * should keep its own freeze count and use
1996 * a bottom half handler to run the queues
1997 * so we can unblock with our own lock held.
1998 */
1999 if (unblock_reqs)
2000 scsi_unblock_requests(ahc->platform_data->host);
2001 }
2002
2003 static int
2004 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2005 {
2006 struct ahc_softc *ahc;
2007 struct ahc_linux_device *dev;
2008 struct scb *pending_scb;
2009 u_int saved_scbptr;
2010 u_int active_scb_index;
2011 u_int last_phase;
2012 u_int saved_scsiid;
2013 u_int cdb_byte;
2014 int retval;
2015 int was_paused;
2016 int paused;
2017 int wait;
2018 int disconnected;
2019 unsigned long flags;
2020
2021 pending_scb = NULL;
2022 paused = FALSE;
2023 wait = FALSE;
2024 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2025
2026 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
2027 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2028
2029 printf("CDB:");
2030 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2031 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2032 printf("\n");
2033
2034 ahc_lock(ahc, &flags);
2035
2036 /*
2037 * First determine if we currently own this command.
2038 * Start by searching the device queue. If not found
2039 * there, check the pending_scb list. If not found
2040 * at all, and the system wanted us to just abort the
2041 * command, return success.
2042 */
2043 dev = scsi_transport_device_data(cmd->device);
2044
2045 if (dev == NULL) {
2046 /*
2047 * No target device for this command exists,
2048 * so we must not still own the command.
2049 */
2050 printf("%s:%d:%d:%d: Is not an active device\n",
2051 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2052 cmd->device->lun);
2053 retval = SUCCESS;
2054 goto no_cmd;
2055 }
2056
2057 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2058 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2059 cmd->device->channel + 'A',
2060 cmd->device->lun,
2061 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2062 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2063 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2064 cmd->device->lun);
2065 retval = SUCCESS;
2066 goto done;
2067 }
2068
2069 /*
2070 * See if we can find a matching cmd in the pending list.
2071 */
2072 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2073 if (pending_scb->io_ctx == cmd)
2074 break;
2075 }
2076
2077 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2078
2079 /* Any SCB for this device will do for a target reset */
2080 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2081 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2082 scmd_channel(cmd) + 'A',
2083 CAM_LUN_WILDCARD,
2084 SCB_LIST_NULL, ROLE_INITIATOR))
2085 break;
2086 }
2087 }
2088
2089 if (pending_scb == NULL) {
2090 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2091 goto no_cmd;
2092 }
2093
2094 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2095 /*
2096 * We can't queue two recovery actions using the same SCB
2097 */
2098 retval = FAILED;
2099 goto done;
2100 }
2101
2102 /*
2103 * Ensure that the card doesn't do anything
2104 * behind our back and that we didn't "just" miss
2105 * an interrupt that would affect this cmd.
2106 */
2107 was_paused = ahc_is_paused(ahc);
2108 ahc_pause_and_flushwork(ahc);
2109 paused = TRUE;
2110
2111 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2112 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2113 goto no_cmd;
2114 }
2115
2116 printf("%s: At time of recovery, card was %spaused\n",
2117 ahc_name(ahc), was_paused ? "" : "not ");
2118 ahc_dump_card_state(ahc);
2119
2120 disconnected = TRUE;
2121 if (flag == SCB_ABORT) {
2122 if (ahc_search_qinfifo(ahc, cmd->device->id,
2123 cmd->device->channel + 'A',
2124 cmd->device->lun,
2125 pending_scb->hscb->tag,
2126 ROLE_INITIATOR, CAM_REQ_ABORTED,
2127 SEARCH_COMPLETE) > 0) {
2128 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2129 ahc_name(ahc), cmd->device->channel,
2130 cmd->device->id, cmd->device->lun);
2131 retval = SUCCESS;
2132 goto done;
2133 }
2134 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2135 cmd->device->channel + 'A',
2136 cmd->device->lun, pending_scb->hscb->tag,
2137 ROLE_INITIATOR, /*status*/0,
2138 SEARCH_COUNT) > 0) {
2139 disconnected = FALSE;
2140 }
2141
2142 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2143 struct scb *bus_scb;
2144
2145 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2146 if (bus_scb == pending_scb)
2147 disconnected = FALSE;
2148 else if (flag != SCB_ABORT
2149 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2150 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2151 disconnected = FALSE;
2152 }
2153
2154 /*
2155 * At this point, pending_scb is the scb associated with the
2156 * passed in command. That command is currently active on the
2157 * bus, is in the disconnected state, or we're hoping to find
2158 * a command for the same target active on the bus to abuse to
2159 * send a BDR. Queue the appropriate message based on which of
2160 * these states we are in.
2161 */
2162 last_phase = ahc_inb(ahc, LASTPHASE);
2163 saved_scbptr = ahc_inb(ahc, SCBPTR);
2164 active_scb_index = ahc_inb(ahc, SCB_TAG);
2165 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2166 if (last_phase != P_BUSFREE
2167 && (pending_scb->hscb->tag == active_scb_index
2168 || (flag == SCB_DEVICE_RESET
2169 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
2170
2171 /*
2172 * We're active on the bus, so assert ATN
2173 * and hope that the target responds.
2174 */
2175 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2176 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2177 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2178 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2179 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2180 wait = TRUE;
2181 } else if (disconnected) {
2182
2183 /*
2184 * Actually re-queue this SCB in an attempt
2185 * to select the device before it reconnects.
2186 * In either case (selection or reselection),
2187 * we will now issue the approprate message
2188 * to the timed-out device.
2189 *
2190 * Set the MK_MESSAGE control bit indicating
2191 * that we desire to send a message. We
2192 * also set the disconnected flag since
2193 * in the paging case there is no guarantee
2194 * that our SCB control byte matches the
2195 * version on the card. We don't want the
2196 * sequencer to abort the command thinking
2197 * an unsolicited reselection occurred.
2198 */
2199 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2200 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2201
2202 /*
2203 * Remove any cached copy of this SCB in the
2204 * disconnected list in preparation for the
2205 * queuing of our abort SCB. We use the
2206 * same element in the SCB, SCB_NEXT, for
2207 * both the qinfifo and the disconnected list.
2208 */
2209 ahc_search_disc_list(ahc, cmd->device->id,
2210 cmd->device->channel + 'A',
2211 cmd->device->lun, pending_scb->hscb->tag,
2212 /*stop_on_first*/TRUE,
2213 /*remove*/TRUE,
2214 /*save_state*/FALSE);
2215
2216 /*
2217 * In the non-paging case, the sequencer will
2218 * never re-reference the in-core SCB.
2219 * To make sure we are notified during
2220 * reslection, set the MK_MESSAGE flag in
2221 * the card's copy of the SCB.
2222 */
2223 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2224 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2225 ahc_outb(ahc, SCB_CONTROL,
2226 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2227 }
2228
2229 /*
2230 * Clear out any entries in the QINFIFO first
2231 * so we are the next SCB for this target
2232 * to run.
2233 */
2234 ahc_search_qinfifo(ahc, cmd->device->id,
2235 cmd->device->channel + 'A',
2236 cmd->device->lun, SCB_LIST_NULL,
2237 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2238 SEARCH_COMPLETE);
2239 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2240 ahc_outb(ahc, SCBPTR, saved_scbptr);
2241 ahc_print_path(ahc, pending_scb);
2242 printf("Device is disconnected, re-queuing SCB\n");
2243 wait = TRUE;
2244 } else {
2245 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2246 retval = FAILED;
2247 goto done;
2248 }
2249
2250 no_cmd:
2251 /*
2252 * Our assumption is that if we don't have the command, no
2253 * recovery action was required, so we return success. Again,
2254 * the semantics of the mid-layer recovery engine are not
2255 * well defined, so this may change in time.
2256 */
2257 retval = SUCCESS;
2258 done:
2259 if (paused)
2260 ahc_unpause(ahc);
2261 if (wait) {
2262 DECLARE_COMPLETION_ONSTACK(done);
2263
2264 ahc->platform_data->eh_done = &done;
2265 ahc_unlock(ahc, &flags);
2266
2267 printf("Recovery code sleeping\n");
2268 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2269 ahc_lock(ahc, &flags);
2270 ahc->platform_data->eh_done = NULL;
2271 ahc_unlock(ahc, &flags);
2272
2273 printf("Timer Expired\n");
2274 retval = FAILED;
2275 }
2276 printf("Recovery code awake\n");
2277 } else
2278 ahc_unlock(ahc, &flags);
2279 return (retval);
2280 }
2281
2282 void
2283 ahc_platform_dump_card_state(struct ahc_softc *ahc)
2284 {
2285 }
2286
2287 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2288 {
2289 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2290 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2291 struct ahc_devinfo devinfo;
2292 unsigned long flags;
2293
2294 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2295 starget->channel + 'A', ROLE_INITIATOR);
2296 ahc_lock(ahc, &flags);
2297 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2298 ahc_unlock(ahc, &flags);
2299 }
2300
2301 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2302 {
2303 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2304 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2305 struct ahc_tmode_tstate *tstate;
2306 struct ahc_initiator_tinfo *tinfo
2307 = ahc_fetch_transinfo(ahc,
2308 starget->channel + 'A',
2309 shost->this_id, starget->id, &tstate);
2310 struct ahc_devinfo devinfo;
2311 unsigned int ppr_options = tinfo->goal.ppr_options;
2312 unsigned long flags;
2313 unsigned long offset = tinfo->goal.offset;
2314 struct ahc_syncrate *syncrate;
2315
2316 if (offset == 0)
2317 offset = MAX_OFFSET;
2318
2319 if (period < 9)
2320 period = 9; /* 12.5ns is our minimum */
2321 if (period == 9) {
2322 if (spi_max_width(starget))
2323 ppr_options |= MSG_EXT_PPR_DT_REQ;
2324 else
2325 /* need wide for DT and need DT for 12.5 ns */
2326 period = 10;
2327 }
2328
2329 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2330 starget->channel + 'A', ROLE_INITIATOR);
2331
2332 /* all PPR requests apart from QAS require wide transfers */
2333 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2334 if (spi_width(starget) == 0)
2335 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2336 }
2337
2338 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2339 ahc_lock(ahc, &flags);
2340 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2341 ppr_options, AHC_TRANS_GOAL, FALSE);
2342 ahc_unlock(ahc, &flags);
2343 }
2344
2345 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2346 {
2347 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2348 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2349 struct ahc_tmode_tstate *tstate;
2350 struct ahc_initiator_tinfo *tinfo
2351 = ahc_fetch_transinfo(ahc,
2352 starget->channel + 'A',
2353 shost->this_id, starget->id, &tstate);
2354 struct ahc_devinfo devinfo;
2355 unsigned int ppr_options = 0;
2356 unsigned int period = 0;
2357 unsigned long flags;
2358 struct ahc_syncrate *syncrate = NULL;
2359
2360 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2361 starget->channel + 'A', ROLE_INITIATOR);
2362 if (offset != 0) {
2363 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2364 period = tinfo->goal.period;
2365 ppr_options = tinfo->goal.ppr_options;
2366 }
2367 ahc_lock(ahc, &flags);
2368 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2369 ppr_options, AHC_TRANS_GOAL, FALSE);
2370 ahc_unlock(ahc, &flags);
2371 }
2372
2373 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2374 {
2375 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2376 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2377 struct ahc_tmode_tstate *tstate;
2378 struct ahc_initiator_tinfo *tinfo
2379 = ahc_fetch_transinfo(ahc,
2380 starget->channel + 'A',
2381 shost->this_id, starget->id, &tstate);
2382 struct ahc_devinfo devinfo;
2383 unsigned int ppr_options = tinfo->goal.ppr_options
2384 & ~MSG_EXT_PPR_DT_REQ;
2385 unsigned int period = tinfo->goal.period;
2386 unsigned int width = tinfo->goal.width;
2387 unsigned long flags;
2388 struct ahc_syncrate *syncrate;
2389
2390 if (dt && spi_max_width(starget)) {
2391 ppr_options |= MSG_EXT_PPR_DT_REQ;
2392 if (!width)
2393 ahc_linux_set_width(starget, 1);
2394 } else if (period == 9)
2395 period = 10; /* if resetting DT, period must be >= 25ns */
2396
2397 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2398 starget->channel + 'A', ROLE_INITIATOR);
2399 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
2400 ahc_lock(ahc, &flags);
2401 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2402 ppr_options, AHC_TRANS_GOAL, FALSE);
2403 ahc_unlock(ahc, &flags);
2404 }
2405
2406 #if 0
2407 /* FIXME: This code claims to support IU and QAS. However, the actual
2408 * sequencer code and aic7xxx_core have no support for these parameters and
2409 * will get into a bad state if they're negotiated. Do not enable this
2410 * unless you know what you're doing */
2411 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2412 {
2413 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2414 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2415 struct ahc_tmode_tstate *tstate;
2416 struct ahc_initiator_tinfo *tinfo
2417 = ahc_fetch_transinfo(ahc,
2418 starget->channel + 'A',
2419 shost->this_id, starget->id, &tstate);
2420 struct ahc_devinfo devinfo;
2421 unsigned int ppr_options = tinfo->goal.ppr_options
2422 & ~MSG_EXT_PPR_QAS_REQ;
2423 unsigned int period = tinfo->goal.period;
2424 unsigned long flags;
2425 struct ahc_syncrate *syncrate;
2426
2427 if (qas)
2428 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2429
2430 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2431 starget->channel + 'A', ROLE_INITIATOR);
2432 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2433 ahc_lock(ahc, &flags);
2434 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2435 ppr_options, AHC_TRANS_GOAL, FALSE);
2436 ahc_unlock(ahc, &flags);
2437 }
2438
2439 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2440 {
2441 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2442 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2443 struct ahc_tmode_tstate *tstate;
2444 struct ahc_initiator_tinfo *tinfo
2445 = ahc_fetch_transinfo(ahc,
2446 starget->channel + 'A',
2447 shost->this_id, starget->id, &tstate);
2448 struct ahc_devinfo devinfo;
2449 unsigned int ppr_options = tinfo->goal.ppr_options
2450 & ~MSG_EXT_PPR_IU_REQ;
2451 unsigned int period = tinfo->goal.period;
2452 unsigned long flags;
2453 struct ahc_syncrate *syncrate;
2454
2455 if (iu)
2456 ppr_options |= MSG_EXT_PPR_IU_REQ;
2457
2458 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2459 starget->channel + 'A', ROLE_INITIATOR);
2460 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2461 ahc_lock(ahc, &flags);
2462 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2463 ppr_options, AHC_TRANS_GOAL, FALSE);
2464 ahc_unlock(ahc, &flags);
2465 }
2466 #endif
2467
2468 static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2469 {
2470 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
2471 unsigned long flags;
2472 u8 mode;
2473
2474 if (!(ahc->features & AHC_ULTRA2)) {
2475 /* non-LVD chipset, may not have SBLKCTL reg */
2476 spi_signalling(shost) =
2477 ahc->features & AHC_HVD ?
2478 SPI_SIGNAL_HVD :
2479 SPI_SIGNAL_SE;
2480 return;
2481 }
2482
2483 ahc_lock(ahc, &flags);
2484 ahc_pause(ahc);
2485 mode = ahc_inb(ahc, SBLKCTL);
2486 ahc_unpause(ahc);
2487 ahc_unlock(ahc, &flags);
2488
2489 if (mode & ENAB40)
2490 spi_signalling(shost) = SPI_SIGNAL_LVD;
2491 else if (mode & ENAB20)
2492 spi_signalling(shost) = SPI_SIGNAL_SE;
2493 else
2494 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2495 }
2496
2497 static struct spi_function_template ahc_linux_transport_functions = {
2498 .set_offset = ahc_linux_set_offset,
2499 .show_offset = 1,
2500 .set_period = ahc_linux_set_period,
2501 .show_period = 1,
2502 .set_width = ahc_linux_set_width,
2503 .show_width = 1,
2504 .set_dt = ahc_linux_set_dt,
2505 .show_dt = 1,
2506 #if 0
2507 .set_iu = ahc_linux_set_iu,
2508 .show_iu = 1,
2509 .set_qas = ahc_linux_set_qas,
2510 .show_qas = 1,
2511 #endif
2512 .get_signalling = ahc_linux_get_signalling,
2513 };
2514
2515
2516
2517 static int __init
2518 ahc_linux_init(void)
2519 {
2520 /*
2521 * If we've been passed any parameters, process them now.
2522 */
2523 if (aic7xxx)
2524 aic7xxx_setup(aic7xxx);
2525
2526 ahc_linux_transport_template =
2527 spi_attach_transport(&ahc_linux_transport_functions);
2528 if (!ahc_linux_transport_template)
2529 return -ENODEV;
2530
2531 scsi_transport_reserve_device(ahc_linux_transport_template,
2532 sizeof(struct ahc_linux_device));
2533
2534 ahc_linux_pci_init();
2535 ahc_linux_eisa_init();
2536 return 0;
2537 }
2538
2539 static void
2540 ahc_linux_exit(void)
2541 {
2542 ahc_linux_pci_exit();
2543 ahc_linux_eisa_exit();
2544 spi_release_transport(ahc_linux_transport_template);
2545 }
2546
2547 module_init(ahc_linux_init);
2548 module_exit(ahc_linux_exit);
kernel source for telekom puls (alcatel/mediatek)