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