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scsi: use 64-bit LUNs
[deliverable/linux.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 * To change the default number of tagged transactions allowed per-device,
149 * add a line to the lilo.conf file like:
150 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
151 * which will result in the first four devices on the first two
152 * controllers being set to a tagged queue depth of 32.
153 *
154 * The tag_commands is an array of 16 to allow for wide and twin adapters.
155 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
156 * for channel 1.
157 */
158 typedef struct {
159 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
160 } adapter_tag_info_t;
161
162 /*
163 * Modify this as you see fit for your system.
164 *
165 * 0 tagged queuing disabled
166 * 1 <= n <= 253 n == max tags ever dispatched.
167 *
168 * The driver will throttle the number of commands dispatched to a
169 * device if it returns queue full. For devices with a fixed maximum
170 * queue depth, the driver will eventually determine this depth and
171 * lock it in (a console message is printed to indicate that a lock
172 * has occurred). On some devices, queue full is returned for a temporary
173 * resource shortage. These devices will return queue full at varying
174 * depths. The driver will throttle back when the queue fulls occur and
175 * attempt to slowly increase the depth over time as the device recovers
176 * from the resource shortage.
177 *
178 * In this example, the first line will disable tagged queueing for all
179 * the devices on the first probed aic7xxx adapter.
180 *
181 * The second line enables tagged queueing with 4 commands/LUN for IDs
182 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
183 * driver to attempt to use up to 64 tags for ID 1.
184 *
185 * The third line is the same as the first line.
186 *
187 * The fourth line disables tagged queueing for devices 0 and 3. It
188 * enables tagged queueing for the other IDs, with 16 commands/LUN
189 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
190 * IDs 2, 5-7, and 9-15.
191 */
192
193 /*
194 * NOTE: The below structure is for reference only, the actual structure
195 * to modify in order to change things is just below this comment block.
196 adapter_tag_info_t aic7xxx_tag_info[] =
197 {
198 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
199 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
200 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
201 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
202 };
203 */
204
205 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
206 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
207 #else
208 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
209 #endif
210
211 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
212 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
213 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
214 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
215 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
216 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
217 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
218 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
219 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
220 }
221
222 /*
223 * By default, use the number of commands specified by
224 * the users kernel configuration.
225 */
226 static adapter_tag_info_t aic7xxx_tag_info[] =
227 {
228 {AIC7XXX_CONFIGED_TAG_COMMANDS},
229 {AIC7XXX_CONFIGED_TAG_COMMANDS},
230 {AIC7XXX_CONFIGED_TAG_COMMANDS},
231 {AIC7XXX_CONFIGED_TAG_COMMANDS},
232 {AIC7XXX_CONFIGED_TAG_COMMANDS},
233 {AIC7XXX_CONFIGED_TAG_COMMANDS},
234 {AIC7XXX_CONFIGED_TAG_COMMANDS},
235 {AIC7XXX_CONFIGED_TAG_COMMANDS},
236 {AIC7XXX_CONFIGED_TAG_COMMANDS},
237 {AIC7XXX_CONFIGED_TAG_COMMANDS},
238 {AIC7XXX_CONFIGED_TAG_COMMANDS},
239 {AIC7XXX_CONFIGED_TAG_COMMANDS},
240 {AIC7XXX_CONFIGED_TAG_COMMANDS},
241 {AIC7XXX_CONFIGED_TAG_COMMANDS},
242 {AIC7XXX_CONFIGED_TAG_COMMANDS},
243 {AIC7XXX_CONFIGED_TAG_COMMANDS}
244 };
245
246 /*
247 * There should be a specific return value for this in scsi.h, but
248 * it seems that most drivers ignore it.
249 */
250 #define DID_UNDERFLOW DID_ERROR
251
252 void
253 ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
254 {
255 printk("(scsi%d:%c:%d:%d): ",
256 ahc->platform_data->host->host_no,
257 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
258 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
259 scb != NULL ? SCB_GET_LUN(scb) : -1);
260 }
261
262 /*
263 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
264 * cards in the system. This should be fixed. Exceptions to this
265 * rule are noted in the comments.
266 */
267
268 /*
269 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
270 * has no effect on any later resets that might occur due to things like
271 * SCSI bus timeouts.
272 */
273 static uint32_t aic7xxx_no_reset;
274
275 /*
276 * Should we force EXTENDED translation on a controller.
277 * 0 == Use whatever is in the SEEPROM or default to off
278 * 1 == Use whatever is in the SEEPROM or default to on
279 */
280 static uint32_t aic7xxx_extended;
281
282 /*
283 * PCI bus parity checking of the Adaptec controllers. This is somewhat
284 * dubious at best. To my knowledge, this option has never actually
285 * solved a PCI parity problem, but on certain machines with broken PCI
286 * chipset configurations where stray PCI transactions with bad parity are
287 * the norm rather than the exception, the error messages can be overwhelming.
288 * It's included in the driver for completeness.
289 * 0 = Shut off PCI parity check
290 * non-0 = reverse polarity pci parity checking
291 */
292 static uint32_t aic7xxx_pci_parity = ~0;
293
294 /*
295 * There are lots of broken chipsets in the world. Some of them will
296 * violate the PCI spec when we issue byte sized memory writes to our
297 * controller. I/O mapped register access, if allowed by the given
298 * platform, will work in almost all cases.
299 */
300 uint32_t aic7xxx_allow_memio = ~0;
301
302 /*
303 * So that we can set how long each device is given as a selection timeout.
304 * The table of values goes like this:
305 * 0 - 256ms
306 * 1 - 128ms
307 * 2 - 64ms
308 * 3 - 32ms
309 * We default to 256ms because some older devices need a longer time
310 * to respond to initial selection.
311 */
312 static uint32_t aic7xxx_seltime;
313
314 /*
315 * Certain devices do not perform any aging on commands. Should the
316 * device be saturated by commands in one portion of the disk, it is
317 * possible for transactions on far away sectors to never be serviced.
318 * To handle these devices, we can periodically send an ordered tag to
319 * force all outstanding transactions to be serviced prior to a new
320 * transaction.
321 */
322 static uint32_t aic7xxx_periodic_otag;
323
324 /*
325 * Module information and settable options.
326 */
327 static char *aic7xxx = NULL;
328
329 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
330 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
331 MODULE_LICENSE("Dual BSD/GPL");
332 MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
333 module_param(aic7xxx, charp, 0444);
334 MODULE_PARM_DESC(aic7xxx,
335 "period-delimited options string:\n"
336 " verbose Enable verbose/diagnostic logging\n"
337 " allow_memio Allow device registers to be memory mapped\n"
338 " debug Bitmask of debug values to enable\n"
339 " no_probe Toggle EISA/VLB controller probing\n"
340 " probe_eisa_vl Toggle EISA/VLB controller probing\n"
341 " no_reset Suppress initial bus resets\n"
342 " extended Enable extended geometry on all controllers\n"
343 " periodic_otag Send an ordered tagged transaction\n"
344 " periodically to prevent tag starvation.\n"
345 " This may be required by some older disk\n"
346 " drives or RAID arrays.\n"
347 " tag_info:<tag_str> Set per-target tag depth\n"
348 " global_tag_depth:<int> Global tag depth for every target\n"
349 " on every bus\n"
350 " seltime:<int> Selection Timeout\n"
351 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
352 "\n"
353 " Sample modprobe configuration file:\n"
354 " # Toggle EISA/VLB probing\n"
355 " # Set tag depth on Controller 1/Target 1 to 10 tags\n"
356 " # Shorten the selection timeout to 128ms\n"
357 "\n"
358 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
359 );
360
361 static void ahc_linux_handle_scsi_status(struct ahc_softc *,
362 struct scsi_device *,
363 struct scb *);
364 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
365 struct scsi_cmnd *cmd);
366 static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
367 static void ahc_linux_release_simq(struct ahc_softc *ahc);
368 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
369 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
370 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
371 struct ahc_devinfo *devinfo);
372 static void ahc_linux_device_queue_depth(struct scsi_device *);
373 static int ahc_linux_run_command(struct ahc_softc*,
374 struct ahc_linux_device *,
375 struct scsi_cmnd *);
376 static void ahc_linux_setup_tag_info_global(char *p);
377 static int aic7xxx_setup(char *s);
378
379 static int ahc_linux_unit;
380
381
382 /************************** OS Utility Wrappers *******************************/
383 void
384 ahc_delay(long usec)
385 {
386 /*
387 * udelay on Linux can have problems for
388 * multi-millisecond waits. Wait at most
389 * 1024us per call.
390 */
391 while (usec > 0) {
392 udelay(usec % 1024);
393 usec -= 1024;
394 }
395 }
396
397 /***************************** Low Level I/O **********************************/
398 uint8_t
399 ahc_inb(struct ahc_softc * ahc, long port)
400 {
401 uint8_t x;
402
403 if (ahc->tag == BUS_SPACE_MEMIO) {
404 x = readb(ahc->bsh.maddr + port);
405 } else {
406 x = inb(ahc->bsh.ioport + port);
407 }
408 mb();
409 return (x);
410 }
411
412 void
413 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
414 {
415 if (ahc->tag == BUS_SPACE_MEMIO) {
416 writeb(val, ahc->bsh.maddr + port);
417 } else {
418 outb(val, ahc->bsh.ioport + port);
419 }
420 mb();
421 }
422
423 void
424 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
425 {
426 int i;
427
428 /*
429 * There is probably a more efficient way to do this on Linux
430 * but we don't use this for anything speed critical and this
431 * should work.
432 */
433 for (i = 0; i < count; i++)
434 ahc_outb(ahc, port, *array++);
435 }
436
437 void
438 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
439 {
440 int i;
441
442 /*
443 * There is probably a more efficient way to do this on Linux
444 * but we don't use this for anything speed critical and this
445 * should work.
446 */
447 for (i = 0; i < count; i++)
448 *array++ = ahc_inb(ahc, port);
449 }
450
451 /********************************* Inlines ************************************/
452 static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
453
454 static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
455 struct ahc_dma_seg *sg,
456 dma_addr_t addr, bus_size_t len);
457
458 static void
459 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
460 {
461 struct scsi_cmnd *cmd;
462
463 cmd = scb->io_ctx;
464 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
465
466 scsi_dma_unmap(cmd);
467 }
468
469 static int
470 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
471 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
472 {
473 int consumed;
474
475 if ((scb->sg_count + 1) > AHC_NSEG)
476 panic("Too few segs for dma mapping. "
477 "Increase AHC_NSEG\n");
478
479 consumed = 1;
480 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
481 scb->platform_data->xfer_len += len;
482
483 if (sizeof(dma_addr_t) > 4
484 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
485 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
486
487 sg->len = ahc_htole32(len);
488 return (consumed);
489 }
490
491 /*
492 * Return a string describing the driver.
493 */
494 static const char *
495 ahc_linux_info(struct Scsi_Host *host)
496 {
497 static char buffer[512];
498 char ahc_info[256];
499 char *bp;
500 struct ahc_softc *ahc;
501
502 bp = &buffer[0];
503 ahc = *(struct ahc_softc **)host->hostdata;
504 memset(bp, 0, sizeof(buffer));
505 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n"
506 " <");
507 strcat(bp, ahc->description);
508 strcat(bp, ">\n"
509 " ");
510 ahc_controller_info(ahc, ahc_info);
511 strcat(bp, ahc_info);
512 strcat(bp, "\n");
513
514 return (bp);
515 }
516
517 /*
518 * Queue an SCB to the controller.
519 */
520 static int
521 ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
522 {
523 struct ahc_softc *ahc;
524 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
525 int rtn = SCSI_MLQUEUE_HOST_BUSY;
526 unsigned long flags;
527
528 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
529
530 ahc_lock(ahc, &flags);
531 if (ahc->platform_data->qfrozen == 0) {
532 cmd->scsi_done = scsi_done;
533 cmd->result = CAM_REQ_INPROG << 16;
534 rtn = ahc_linux_run_command(ahc, dev, cmd);
535 }
536 ahc_unlock(ahc, &flags);
537
538 return rtn;
539 }
540
541 static DEF_SCSI_QCMD(ahc_linux_queue)
542
543 static inline struct scsi_target **
544 ahc_linux_target_in_softc(struct scsi_target *starget)
545 {
546 struct ahc_softc *ahc =
547 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
548 unsigned int target_offset;
549
550 target_offset = starget->id;
551 if (starget->channel != 0)
552 target_offset += 8;
553
554 return &ahc->platform_data->starget[target_offset];
555 }
556
557 static int
558 ahc_linux_target_alloc(struct scsi_target *starget)
559 {
560 struct ahc_softc *ahc =
561 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
562 struct seeprom_config *sc = ahc->seep_config;
563 unsigned long flags;
564 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
565 unsigned short scsirate;
566 struct ahc_devinfo devinfo;
567 struct ahc_initiator_tinfo *tinfo;
568 struct ahc_tmode_tstate *tstate;
569 char channel = starget->channel + 'A';
570 unsigned int our_id = ahc->our_id;
571 unsigned int target_offset;
572
573 target_offset = starget->id;
574 if (starget->channel != 0)
575 target_offset += 8;
576
577 if (starget->channel)
578 our_id = ahc->our_id_b;
579
580 ahc_lock(ahc, &flags);
581
582 BUG_ON(*ahc_targp != NULL);
583
584 *ahc_targp = starget;
585
586 if (sc) {
587 int maxsync = AHC_SYNCRATE_DT;
588 int ultra = 0;
589 int flags = sc->device_flags[target_offset];
590
591 if (ahc->flags & AHC_NEWEEPROM_FMT) {
592 if (flags & CFSYNCHISULTRA)
593 ultra = 1;
594 } else if (flags & CFULTRAEN)
595 ultra = 1;
596 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
597 * change it to ultra=0, CFXFER = 0 */
598 if(ultra && (flags & CFXFER) == 0x04) {
599 ultra = 0;
600 flags &= ~CFXFER;
601 }
602
603 if ((ahc->features & AHC_ULTRA2) != 0) {
604 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
605 } else {
606 scsirate = (flags & CFXFER) << 4;
607 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
608 AHC_SYNCRATE_FAST;
609 }
610 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
611 if (!(flags & CFSYNCH))
612 spi_max_offset(starget) = 0;
613 spi_min_period(starget) =
614 ahc_find_period(ahc, scsirate, maxsync);
615
616 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
617 starget->id, &tstate);
618 }
619 ahc_compile_devinfo(&devinfo, our_id, starget->id,
620 CAM_LUN_WILDCARD, channel,
621 ROLE_INITIATOR);
622 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
623 AHC_TRANS_GOAL, /*paused*/FALSE);
624 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
625 AHC_TRANS_GOAL, /*paused*/FALSE);
626 ahc_unlock(ahc, &flags);
627
628 return 0;
629 }
630
631 static void
632 ahc_linux_target_destroy(struct scsi_target *starget)
633 {
634 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
635
636 *ahc_targp = NULL;
637 }
638
639 static int
640 ahc_linux_slave_alloc(struct scsi_device *sdev)
641 {
642 struct ahc_softc *ahc =
643 *((struct ahc_softc **)sdev->host->hostdata);
644 struct scsi_target *starget = sdev->sdev_target;
645 struct ahc_linux_device *dev;
646
647 if (bootverbose)
648 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
649
650 dev = scsi_transport_device_data(sdev);
651 memset(dev, 0, sizeof(*dev));
652
653 /*
654 * We start out life using untagged
655 * transactions of which we allow one.
656 */
657 dev->openings = 1;
658
659 /*
660 * Set maxtags to 0. This will be changed if we
661 * later determine that we are dealing with
662 * a tagged queuing capable device.
663 */
664 dev->maxtags = 0;
665
666 spi_period(starget) = 0;
667
668 return 0;
669 }
670
671 static int
672 ahc_linux_slave_configure(struct scsi_device *sdev)
673 {
674 struct ahc_softc *ahc;
675
676 ahc = *((struct ahc_softc **)sdev->host->hostdata);
677
678 if (bootverbose)
679 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
680
681 ahc_linux_device_queue_depth(sdev);
682
683 /* Initial Domain Validation */
684 if (!spi_initial_dv(sdev->sdev_target))
685 spi_dv_device(sdev);
686
687 return 0;
688 }
689
690 #if defined(__i386__)
691 /*
692 * Return the disk geometry for the given SCSI device.
693 */
694 static int
695 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
696 sector_t capacity, int geom[])
697 {
698 uint8_t *bh;
699 int heads;
700 int sectors;
701 int cylinders;
702 int ret;
703 int extended;
704 struct ahc_softc *ahc;
705 u_int channel;
706
707 ahc = *((struct ahc_softc **)sdev->host->hostdata);
708 channel = sdev_channel(sdev);
709
710 bh = scsi_bios_ptable(bdev);
711 if (bh) {
712 ret = scsi_partsize(bh, capacity,
713 &geom[2], &geom[0], &geom[1]);
714 kfree(bh);
715 if (ret != -1)
716 return (ret);
717 }
718 heads = 64;
719 sectors = 32;
720 cylinders = aic_sector_div(capacity, heads, sectors);
721
722 if (aic7xxx_extended != 0)
723 extended = 1;
724 else if (channel == 0)
725 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
726 else
727 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
728 if (extended && cylinders >= 1024) {
729 heads = 255;
730 sectors = 63;
731 cylinders = aic_sector_div(capacity, heads, sectors);
732 }
733 geom[0] = heads;
734 geom[1] = sectors;
735 geom[2] = cylinders;
736 return (0);
737 }
738 #endif
739
740 /*
741 * Abort the current SCSI command(s).
742 */
743 static int
744 ahc_linux_abort(struct scsi_cmnd *cmd)
745 {
746 int error;
747
748 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
749 if (error != 0)
750 printk("aic7xxx_abort returns 0x%x\n", error);
751 return (error);
752 }
753
754 /*
755 * Attempt to send a target reset message to the device that timed out.
756 */
757 static int
758 ahc_linux_dev_reset(struct scsi_cmnd *cmd)
759 {
760 int error;
761
762 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
763 if (error != 0)
764 printk("aic7xxx_dev_reset returns 0x%x\n", error);
765 return (error);
766 }
767
768 /*
769 * Reset the SCSI bus.
770 */
771 static int
772 ahc_linux_bus_reset(struct scsi_cmnd *cmd)
773 {
774 struct ahc_softc *ahc;
775 int found;
776 unsigned long flags;
777
778 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
779
780 ahc_lock(ahc, &flags);
781 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
782 /*initiate reset*/TRUE);
783 ahc_unlock(ahc, &flags);
784
785 if (bootverbose)
786 printk("%s: SCSI bus reset delivered. "
787 "%d SCBs aborted.\n", ahc_name(ahc), found);
788
789 return SUCCESS;
790 }
791
792 struct scsi_host_template aic7xxx_driver_template = {
793 .module = THIS_MODULE,
794 .name = "aic7xxx",
795 .proc_name = "aic7xxx",
796 .show_info = ahc_linux_show_info,
797 .write_info = ahc_proc_write_seeprom,
798 .info = ahc_linux_info,
799 .queuecommand = ahc_linux_queue,
800 .eh_abort_handler = ahc_linux_abort,
801 .eh_device_reset_handler = ahc_linux_dev_reset,
802 .eh_bus_reset_handler = ahc_linux_bus_reset,
803 #if defined(__i386__)
804 .bios_param = ahc_linux_biosparam,
805 #endif
806 .can_queue = AHC_MAX_QUEUE,
807 .this_id = -1,
808 .max_sectors = 8192,
809 .cmd_per_lun = 2,
810 .use_clustering = ENABLE_CLUSTERING,
811 .slave_alloc = ahc_linux_slave_alloc,
812 .slave_configure = ahc_linux_slave_configure,
813 .target_alloc = ahc_linux_target_alloc,
814 .target_destroy = ahc_linux_target_destroy,
815 };
816
817 /**************************** Tasklet Handler *********************************/
818
819 /******************************** Macros **************************************/
820 #define BUILD_SCSIID(ahc, cmd) \
821 ((((cmd)->device->id << TID_SHIFT) & TID) \
822 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
823 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
824
825 /******************************** Bus DMA *************************************/
826 int
827 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
828 bus_size_t alignment, bus_size_t boundary,
829 dma_addr_t lowaddr, dma_addr_t highaddr,
830 bus_dma_filter_t *filter, void *filterarg,
831 bus_size_t maxsize, int nsegments,
832 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
833 {
834 bus_dma_tag_t dmat;
835
836 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
837 if (dmat == NULL)
838 return (ENOMEM);
839
840 /*
841 * Linux is very simplistic about DMA memory. For now don't
842 * maintain all specification information. Once Linux supplies
843 * better facilities for doing these operations, or the
844 * needs of this particular driver change, we might need to do
845 * more here.
846 */
847 dmat->alignment = alignment;
848 dmat->boundary = boundary;
849 dmat->maxsize = maxsize;
850 *ret_tag = dmat;
851 return (0);
852 }
853
854 void
855 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
856 {
857 kfree(dmat);
858 }
859
860 int
861 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
862 int flags, bus_dmamap_t *mapp)
863 {
864 *vaddr = pci_alloc_consistent(ahc->dev_softc,
865 dmat->maxsize, mapp);
866 if (*vaddr == NULL)
867 return ENOMEM;
868 return 0;
869 }
870
871 void
872 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
873 void* vaddr, bus_dmamap_t map)
874 {
875 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
876 vaddr, map);
877 }
878
879 int
880 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
881 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
882 void *cb_arg, int flags)
883 {
884 /*
885 * Assume for now that this will only be used during
886 * initialization and not for per-transaction buffer mapping.
887 */
888 bus_dma_segment_t stack_sg;
889
890 stack_sg.ds_addr = map;
891 stack_sg.ds_len = dmat->maxsize;
892 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
893 return (0);
894 }
895
896 void
897 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
898 {
899 }
900
901 int
902 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
903 {
904 /* Nothing to do */
905 return (0);
906 }
907
908 static void
909 ahc_linux_setup_tag_info_global(char *p)
910 {
911 int tags, i, j;
912
913 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
914 printk("Setting Global Tags= %d\n", tags);
915
916 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
917 for (j = 0; j < AHC_NUM_TARGETS; j++) {
918 aic7xxx_tag_info[i].tag_commands[j] = tags;
919 }
920 }
921 }
922
923 static void
924 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
925 {
926
927 if ((instance >= 0) && (targ >= 0)
928 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
929 && (targ < AHC_NUM_TARGETS)) {
930 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
931 if (bootverbose)
932 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
933 }
934 }
935
936 static char *
937 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
938 void (*callback)(u_long, int, int, int32_t),
939 u_long callback_arg)
940 {
941 char *tok_end;
942 char *tok_end2;
943 int i;
944 int instance;
945 int targ;
946 int done;
947 char tok_list[] = {'.', ',', '{', '}', '\0'};
948
949 /* All options use a ':' name/arg separator */
950 if (*opt_arg != ':')
951 return (opt_arg);
952 opt_arg++;
953 instance = -1;
954 targ = -1;
955 done = FALSE;
956 /*
957 * Restore separator that may be in
958 * the middle of our option argument.
959 */
960 tok_end = strchr(opt_arg, '\0');
961 if (tok_end < end)
962 *tok_end = ',';
963 while (!done) {
964 switch (*opt_arg) {
965 case '{':
966 if (instance == -1) {
967 instance = 0;
968 } else {
969 if (depth > 1) {
970 if (targ == -1)
971 targ = 0;
972 } else {
973 printk("Malformed Option %s\n",
974 opt_name);
975 done = TRUE;
976 }
977 }
978 opt_arg++;
979 break;
980 case '}':
981 if (targ != -1)
982 targ = -1;
983 else if (instance != -1)
984 instance = -1;
985 opt_arg++;
986 break;
987 case ',':
988 case '.':
989 if (instance == -1)
990 done = TRUE;
991 else if (targ >= 0)
992 targ++;
993 else if (instance >= 0)
994 instance++;
995 opt_arg++;
996 break;
997 case '\0':
998 done = TRUE;
999 break;
1000 default:
1001 tok_end = end;
1002 for (i = 0; tok_list[i]; i++) {
1003 tok_end2 = strchr(opt_arg, tok_list[i]);
1004 if ((tok_end2) && (tok_end2 < tok_end))
1005 tok_end = tok_end2;
1006 }
1007 callback(callback_arg, instance, targ,
1008 simple_strtol(opt_arg, NULL, 0));
1009 opt_arg = tok_end;
1010 break;
1011 }
1012 }
1013 return (opt_arg);
1014 }
1015
1016 /*
1017 * Handle Linux boot parameters. This routine allows for assigning a value
1018 * to a parameter with a ':' between the parameter and the value.
1019 * ie. aic7xxx=stpwlev:1,extended
1020 */
1021 static int
1022 aic7xxx_setup(char *s)
1023 {
1024 int i, n;
1025 char *p;
1026 char *end;
1027
1028 static const struct {
1029 const char *name;
1030 uint32_t *flag;
1031 } options[] = {
1032 { "extended", &aic7xxx_extended },
1033 { "no_reset", &aic7xxx_no_reset },
1034 { "verbose", &aic7xxx_verbose },
1035 { "allow_memio", &aic7xxx_allow_memio},
1036 #ifdef AHC_DEBUG
1037 { "debug", &ahc_debug },
1038 #endif
1039 { "periodic_otag", &aic7xxx_periodic_otag },
1040 { "pci_parity", &aic7xxx_pci_parity },
1041 { "seltime", &aic7xxx_seltime },
1042 { "tag_info", NULL },
1043 { "global_tag_depth", NULL },
1044 { "dv", NULL }
1045 };
1046
1047 end = strchr(s, '\0');
1048
1049 /*
1050 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1051 * will never be 0 in this case.
1052 */
1053 n = 0;
1054
1055 while ((p = strsep(&s, ",.")) != NULL) {
1056 if (*p == '\0')
1057 continue;
1058 for (i = 0; i < ARRAY_SIZE(options); i++) {
1059
1060 n = strlen(options[i].name);
1061 if (strncmp(options[i].name, p, n) == 0)
1062 break;
1063 }
1064 if (i == ARRAY_SIZE(options))
1065 continue;
1066
1067 if (strncmp(p, "global_tag_depth", n) == 0) {
1068 ahc_linux_setup_tag_info_global(p + n);
1069 } else if (strncmp(p, "tag_info", n) == 0) {
1070 s = ahc_parse_brace_option("tag_info", p + n, end,
1071 2, ahc_linux_setup_tag_info, 0);
1072 } else if (p[n] == ':') {
1073 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1074 } else if (strncmp(p, "verbose", n) == 0) {
1075 *(options[i].flag) = 1;
1076 } else {
1077 *(options[i].flag) ^= 0xFFFFFFFF;
1078 }
1079 }
1080 return 1;
1081 }
1082
1083 __setup("aic7xxx=", aic7xxx_setup);
1084
1085 uint32_t aic7xxx_verbose;
1086
1087 int
1088 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1089 {
1090 char buf[80];
1091 struct Scsi_Host *host;
1092 char *new_name;
1093 u_long s;
1094 int retval;
1095
1096 template->name = ahc->description;
1097 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1098 if (host == NULL)
1099 return (ENOMEM);
1100
1101 *((struct ahc_softc **)host->hostdata) = ahc;
1102 ahc->platform_data->host = host;
1103 host->can_queue = AHC_MAX_QUEUE;
1104 host->cmd_per_lun = 2;
1105 /* XXX No way to communicate the ID for multiple channels */
1106 host->this_id = ahc->our_id;
1107 host->irq = ahc->platform_data->irq;
1108 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1109 host->max_lun = AHC_NUM_LUNS;
1110 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1111 host->sg_tablesize = AHC_NSEG;
1112 ahc_lock(ahc, &s);
1113 ahc_set_unit(ahc, ahc_linux_unit++);
1114 ahc_unlock(ahc, &s);
1115 sprintf(buf, "scsi%d", host->host_no);
1116 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1117 if (new_name != NULL) {
1118 strcpy(new_name, buf);
1119 ahc_set_name(ahc, new_name);
1120 }
1121 host->unique_id = ahc->unit;
1122 ahc_linux_initialize_scsi_bus(ahc);
1123 ahc_intr_enable(ahc, TRUE);
1124
1125 host->transportt = ahc_linux_transport_template;
1126
1127 retval = scsi_add_host(host,
1128 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1129 if (retval) {
1130 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1131 scsi_host_put(host);
1132 return retval;
1133 }
1134
1135 scsi_scan_host(host);
1136 return 0;
1137 }
1138
1139 /*
1140 * Place the SCSI bus into a known state by either resetting it,
1141 * or forcing transfer negotiations on the next command to any
1142 * target.
1143 */
1144 void
1145 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1146 {
1147 int i;
1148 int numtarg;
1149 unsigned long s;
1150
1151 i = 0;
1152 numtarg = 0;
1153
1154 ahc_lock(ahc, &s);
1155
1156 if (aic7xxx_no_reset != 0)
1157 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1158
1159 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1160 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1161 else
1162 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1163
1164 if ((ahc->features & AHC_TWIN) != 0) {
1165
1166 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1167 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1168 } else {
1169 if (numtarg == 0)
1170 i = 8;
1171 numtarg += 8;
1172 }
1173 }
1174
1175 /*
1176 * Force negotiation to async for all targets that
1177 * will not see an initial bus reset.
1178 */
1179 for (; i < numtarg; i++) {
1180 struct ahc_devinfo devinfo;
1181 struct ahc_initiator_tinfo *tinfo;
1182 struct ahc_tmode_tstate *tstate;
1183 u_int our_id;
1184 u_int target_id;
1185 char channel;
1186
1187 channel = 'A';
1188 our_id = ahc->our_id;
1189 target_id = i;
1190 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1191 channel = 'B';
1192 our_id = ahc->our_id_b;
1193 target_id = i % 8;
1194 }
1195 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1196 target_id, &tstate);
1197 ahc_compile_devinfo(&devinfo, our_id, target_id,
1198 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1199 ahc_update_neg_request(ahc, &devinfo, tstate,
1200 tinfo, AHC_NEG_ALWAYS);
1201 }
1202 ahc_unlock(ahc, &s);
1203 /* Give the bus some time to recover */
1204 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1205 ahc_linux_freeze_simq(ahc);
1206 msleep(AIC7XXX_RESET_DELAY);
1207 ahc_linux_release_simq(ahc);
1208 }
1209 }
1210
1211 int
1212 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1213 {
1214
1215 ahc->platform_data =
1216 kmalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
1217 if (ahc->platform_data == NULL)
1218 return (ENOMEM);
1219 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1220 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1221 ahc_lockinit(ahc);
1222 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1223 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1224 if (aic7xxx_pci_parity == 0)
1225 ahc->flags |= AHC_DISABLE_PCI_PERR;
1226
1227 return (0);
1228 }
1229
1230 void
1231 ahc_platform_free(struct ahc_softc *ahc)
1232 {
1233 struct scsi_target *starget;
1234 int i;
1235
1236 if (ahc->platform_data != NULL) {
1237 /* destroy all of the device and target objects */
1238 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1239 starget = ahc->platform_data->starget[i];
1240 if (starget != NULL) {
1241 ahc->platform_data->starget[i] = NULL;
1242 }
1243 }
1244
1245 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1246 free_irq(ahc->platform_data->irq, ahc);
1247 if (ahc->tag == BUS_SPACE_PIO
1248 && ahc->bsh.ioport != 0)
1249 release_region(ahc->bsh.ioport, 256);
1250 if (ahc->tag == BUS_SPACE_MEMIO
1251 && ahc->bsh.maddr != NULL) {
1252 iounmap(ahc->bsh.maddr);
1253 release_mem_region(ahc->platform_data->mem_busaddr,
1254 0x1000);
1255 }
1256
1257 if (ahc->platform_data->host)
1258 scsi_host_put(ahc->platform_data->host);
1259
1260 kfree(ahc->platform_data);
1261 }
1262 }
1263
1264 void
1265 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1266 {
1267 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1268 SCB_GET_CHANNEL(ahc, scb),
1269 SCB_GET_LUN(scb), SCB_LIST_NULL,
1270 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1271 }
1272
1273 void
1274 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1275 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1276 {
1277 struct ahc_linux_device *dev;
1278 int was_queuing;
1279 int now_queuing;
1280
1281 if (sdev == NULL)
1282 return;
1283 dev = scsi_transport_device_data(sdev);
1284
1285 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1286 switch (alg) {
1287 default:
1288 case AHC_QUEUE_NONE:
1289 now_queuing = 0;
1290 break;
1291 case AHC_QUEUE_BASIC:
1292 now_queuing = AHC_DEV_Q_BASIC;
1293 break;
1294 case AHC_QUEUE_TAGGED:
1295 now_queuing = AHC_DEV_Q_TAGGED;
1296 break;
1297 }
1298 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1299 && (was_queuing != now_queuing)
1300 && (dev->active != 0)) {
1301 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1302 dev->qfrozen++;
1303 }
1304
1305 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1306 if (now_queuing) {
1307 u_int usertags;
1308
1309 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1310 if (!was_queuing) {
1311 /*
1312 * Start out aggressively and allow our
1313 * dynamic queue depth algorithm to take
1314 * care of the rest.
1315 */
1316 dev->maxtags = usertags;
1317 dev->openings = dev->maxtags - dev->active;
1318 }
1319 if (dev->maxtags == 0) {
1320 /*
1321 * Queueing is disabled by the user.
1322 */
1323 dev->openings = 1;
1324 } else if (alg == AHC_QUEUE_TAGGED) {
1325 dev->flags |= AHC_DEV_Q_TAGGED;
1326 if (aic7xxx_periodic_otag != 0)
1327 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1328 } else
1329 dev->flags |= AHC_DEV_Q_BASIC;
1330 } else {
1331 /* We can only have one opening. */
1332 dev->maxtags = 0;
1333 dev->openings = 1 - dev->active;
1334 }
1335 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1336 case AHC_DEV_Q_BASIC:
1337 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1338 scsi_activate_tcq(sdev, dev->openings + dev->active);
1339 break;
1340 case AHC_DEV_Q_TAGGED:
1341 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
1342 scsi_activate_tcq(sdev, dev->openings + dev->active);
1343 break;
1344 default:
1345 /*
1346 * We allow the OS to queue 2 untagged transactions to
1347 * us at any time even though we can only execute them
1348 * serially on the controller/device. This should
1349 * remove some latency.
1350 */
1351 scsi_deactivate_tcq(sdev, 2);
1352 break;
1353 }
1354 }
1355
1356 int
1357 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1358 int lun, u_int tag, role_t role, uint32_t status)
1359 {
1360 return 0;
1361 }
1362
1363 static u_int
1364 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1365 {
1366 static int warned_user;
1367 u_int tags;
1368
1369 tags = 0;
1370 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1371 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
1372 if (warned_user == 0) {
1373
1374 printk(KERN_WARNING
1375 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1376 "aic7xxx: for installed controllers. Using defaults\n"
1377 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1378 "aic7xxx: the aic7xxx_osm..c source file.\n");
1379 warned_user++;
1380 }
1381 tags = AHC_MAX_QUEUE;
1382 } else {
1383 adapter_tag_info_t *tag_info;
1384
1385 tag_info = &aic7xxx_tag_info[ahc->unit];
1386 tags = tag_info->tag_commands[devinfo->target_offset];
1387 if (tags > AHC_MAX_QUEUE)
1388 tags = AHC_MAX_QUEUE;
1389 }
1390 }
1391 return (tags);
1392 }
1393
1394 /*
1395 * Determines the queue depth for a given device.
1396 */
1397 static void
1398 ahc_linux_device_queue_depth(struct scsi_device *sdev)
1399 {
1400 struct ahc_devinfo devinfo;
1401 u_int tags;
1402 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1403
1404 ahc_compile_devinfo(&devinfo,
1405 sdev->sdev_target->channel == 0
1406 ? ahc->our_id : ahc->our_id_b,
1407 sdev->sdev_target->id, sdev->lun,
1408 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1409 ROLE_INITIATOR);
1410 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1411 if (tags != 0 && sdev->tagged_supported != 0) {
1412
1413 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1414 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1415 devinfo.lun, AC_TRANSFER_NEG);
1416 ahc_print_devinfo(ahc, &devinfo);
1417 printk("Tagged Queuing enabled. Depth %d\n", tags);
1418 } else {
1419 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1420 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1421 devinfo.lun, AC_TRANSFER_NEG);
1422 }
1423 }
1424
1425 static int
1426 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1427 struct scsi_cmnd *cmd)
1428 {
1429 struct scb *scb;
1430 struct hardware_scb *hscb;
1431 struct ahc_initiator_tinfo *tinfo;
1432 struct ahc_tmode_tstate *tstate;
1433 uint16_t mask;
1434 struct scb_tailq *untagged_q = NULL;
1435 int nseg;
1436
1437 /*
1438 * Schedule us to run later. The only reason we are not
1439 * running is because the whole controller Q is frozen.
1440 */
1441 if (ahc->platform_data->qfrozen != 0)
1442 return SCSI_MLQUEUE_HOST_BUSY;
1443
1444 /*
1445 * We only allow one untagged transaction
1446 * per target in the initiator role unless
1447 * we are storing a full busy target *lun*
1448 * table in SCB space.
1449 */
1450 if (!blk_rq_tagged(cmd->request)
1451 && (ahc->features & AHC_SCB_BTT) == 0) {
1452 int target_offset;
1453
1454 target_offset = cmd->device->id + cmd->device->channel * 8;
1455 untagged_q = &(ahc->untagged_queues[target_offset]);
1456 if (!TAILQ_EMPTY(untagged_q))
1457 /* if we're already executing an untagged command
1458 * we're busy to another */
1459 return SCSI_MLQUEUE_DEVICE_BUSY;
1460 }
1461
1462 nseg = scsi_dma_map(cmd);
1463 if (nseg < 0)
1464 return SCSI_MLQUEUE_HOST_BUSY;
1465
1466 /*
1467 * Get an scb to use.
1468 */
1469 scb = ahc_get_scb(ahc);
1470 if (!scb) {
1471 scsi_dma_unmap(cmd);
1472 return SCSI_MLQUEUE_HOST_BUSY;
1473 }
1474
1475 scb->io_ctx = cmd;
1476 scb->platform_data->dev = dev;
1477 hscb = scb->hscb;
1478 cmd->host_scribble = (char *)scb;
1479
1480 /*
1481 * Fill out basics of the HSCB.
1482 */
1483 hscb->control = 0;
1484 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1485 hscb->lun = cmd->device->lun;
1486 mask = SCB_GET_TARGET_MASK(ahc, scb);
1487 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1488 SCB_GET_OUR_ID(scb),
1489 SCB_GET_TARGET(ahc, scb), &tstate);
1490 hscb->scsirate = tinfo->scsirate;
1491 hscb->scsioffset = tinfo->curr.offset;
1492 if ((tstate->ultraenb & mask) != 0)
1493 hscb->control |= ULTRAENB;
1494
1495 if ((ahc->user_discenable & mask) != 0)
1496 hscb->control |= DISCENB;
1497
1498 if ((tstate->auto_negotiate & mask) != 0) {
1499 scb->flags |= SCB_AUTO_NEGOTIATE;
1500 scb->hscb->control |= MK_MESSAGE;
1501 }
1502
1503 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1504 int msg_bytes;
1505 uint8_t tag_msgs[2];
1506
1507 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1508 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1509 hscb->control |= tag_msgs[0];
1510 if (tag_msgs[0] == MSG_ORDERED_TASK)
1511 dev->commands_since_idle_or_otag = 0;
1512 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1513 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1514 hscb->control |= MSG_ORDERED_TASK;
1515 dev->commands_since_idle_or_otag = 0;
1516 } else {
1517 hscb->control |= MSG_SIMPLE_TASK;
1518 }
1519 }
1520
1521 hscb->cdb_len = cmd->cmd_len;
1522 if (hscb->cdb_len <= 12) {
1523 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1524 } else {
1525 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1526 scb->flags |= SCB_CDB32_PTR;
1527 }
1528
1529 scb->platform_data->xfer_len = 0;
1530 ahc_set_residual(scb, 0);
1531 ahc_set_sense_residual(scb, 0);
1532 scb->sg_count = 0;
1533
1534 if (nseg > 0) {
1535 struct ahc_dma_seg *sg;
1536 struct scatterlist *cur_seg;
1537 int i;
1538
1539 /* Copy the segments into the SG list. */
1540 sg = scb->sg_list;
1541 /*
1542 * The sg_count may be larger than nseg if
1543 * a transfer crosses a 32bit page.
1544 */
1545 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1546 dma_addr_t addr;
1547 bus_size_t len;
1548 int consumed;
1549
1550 addr = sg_dma_address(cur_seg);
1551 len = sg_dma_len(cur_seg);
1552 consumed = ahc_linux_map_seg(ahc, scb,
1553 sg, addr, len);
1554 sg += consumed;
1555 scb->sg_count += consumed;
1556 }
1557 sg--;
1558 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1559
1560 /*
1561 * Reset the sg list pointer.
1562 */
1563 scb->hscb->sgptr =
1564 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1565
1566 /*
1567 * Copy the first SG into the "current"
1568 * data pointer area.
1569 */
1570 scb->hscb->dataptr = scb->sg_list->addr;
1571 scb->hscb->datacnt = scb->sg_list->len;
1572 } else {
1573 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1574 scb->hscb->dataptr = 0;
1575 scb->hscb->datacnt = 0;
1576 scb->sg_count = 0;
1577 }
1578
1579 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1580 dev->openings--;
1581 dev->active++;
1582 dev->commands_issued++;
1583 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1584 dev->commands_since_idle_or_otag++;
1585
1586 scb->flags |= SCB_ACTIVE;
1587 if (untagged_q) {
1588 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1589 scb->flags |= SCB_UNTAGGEDQ;
1590 }
1591 ahc_queue_scb(ahc, scb);
1592 return 0;
1593 }
1594
1595 /*
1596 * SCSI controller interrupt handler.
1597 */
1598 irqreturn_t
1599 ahc_linux_isr(int irq, void *dev_id)
1600 {
1601 struct ahc_softc *ahc;
1602 u_long flags;
1603 int ours;
1604
1605 ahc = (struct ahc_softc *) dev_id;
1606 ahc_lock(ahc, &flags);
1607 ours = ahc_intr(ahc);
1608 ahc_unlock(ahc, &flags);
1609 return IRQ_RETVAL(ours);
1610 }
1611
1612 void
1613 ahc_platform_flushwork(struct ahc_softc *ahc)
1614 {
1615
1616 }
1617
1618 void
1619 ahc_send_async(struct ahc_softc *ahc, char channel,
1620 u_int target, u_int lun, ac_code code)
1621 {
1622 switch (code) {
1623 case AC_TRANSFER_NEG:
1624 {
1625 struct scsi_target *starget;
1626 struct ahc_linux_target *targ;
1627 struct ahc_initiator_tinfo *tinfo;
1628 struct ahc_tmode_tstate *tstate;
1629 int target_offset;
1630 unsigned int target_ppr_options;
1631
1632 BUG_ON(target == CAM_TARGET_WILDCARD);
1633
1634 tinfo = ahc_fetch_transinfo(ahc, channel,
1635 channel == 'A' ? ahc->our_id
1636 : ahc->our_id_b,
1637 target, &tstate);
1638
1639 /*
1640 * Don't bother reporting results while
1641 * negotiations are still pending.
1642 */
1643 if (tinfo->curr.period != tinfo->goal.period
1644 || tinfo->curr.width != tinfo->goal.width
1645 || tinfo->curr.offset != tinfo->goal.offset
1646 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1647 if (bootverbose == 0)
1648 break;
1649
1650 /*
1651 * Don't bother reporting results that
1652 * are identical to those last reported.
1653 */
1654 target_offset = target;
1655 if (channel == 'B')
1656 target_offset += 8;
1657 starget = ahc->platform_data->starget[target_offset];
1658 if (starget == NULL)
1659 break;
1660 targ = scsi_transport_target_data(starget);
1661
1662 target_ppr_options =
1663 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1664 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1665 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1666
1667 if (tinfo->curr.period == spi_period(starget)
1668 && tinfo->curr.width == spi_width(starget)
1669 && tinfo->curr.offset == spi_offset(starget)
1670 && tinfo->curr.ppr_options == target_ppr_options)
1671 if (bootverbose == 0)
1672 break;
1673
1674 spi_period(starget) = tinfo->curr.period;
1675 spi_width(starget) = tinfo->curr.width;
1676 spi_offset(starget) = tinfo->curr.offset;
1677 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1678 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1679 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1680 spi_display_xfer_agreement(starget);
1681 break;
1682 }
1683 case AC_SENT_BDR:
1684 {
1685 WARN_ON(lun != CAM_LUN_WILDCARD);
1686 scsi_report_device_reset(ahc->platform_data->host,
1687 channel - 'A', target);
1688 break;
1689 }
1690 case AC_BUS_RESET:
1691 if (ahc->platform_data->host != NULL) {
1692 scsi_report_bus_reset(ahc->platform_data->host,
1693 channel - 'A');
1694 }
1695 break;
1696 default:
1697 panic("ahc_send_async: Unexpected async event");
1698 }
1699 }
1700
1701 /*
1702 * Calls the higher level scsi done function and frees the scb.
1703 */
1704 void
1705 ahc_done(struct ahc_softc *ahc, struct scb *scb)
1706 {
1707 struct scsi_cmnd *cmd;
1708 struct ahc_linux_device *dev;
1709
1710 LIST_REMOVE(scb, pending_links);
1711 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1712 struct scb_tailq *untagged_q;
1713 int target_offset;
1714
1715 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1716 untagged_q = &(ahc->untagged_queues[target_offset]);
1717 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1718 BUG_ON(!TAILQ_EMPTY(untagged_q));
1719 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1720 /*
1721 * Transactions aborted from the untagged queue may
1722 * not have been dispatched to the controller, so
1723 * only check the SCB_ACTIVE flag for tagged transactions.
1724 */
1725 printk("SCB %d done'd twice\n", scb->hscb->tag);
1726 ahc_dump_card_state(ahc);
1727 panic("Stopping for safety");
1728 }
1729 cmd = scb->io_ctx;
1730 dev = scb->platform_data->dev;
1731 dev->active--;
1732 dev->openings++;
1733 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1734 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1735 dev->qfrozen--;
1736 }
1737 ahc_linux_unmap_scb(ahc, scb);
1738
1739 /*
1740 * Guard against stale sense data.
1741 * The Linux mid-layer assumes that sense
1742 * was retrieved anytime the first byte of
1743 * the sense buffer looks "sane".
1744 */
1745 cmd->sense_buffer[0] = 0;
1746 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1747 uint32_t amount_xferred;
1748
1749 amount_xferred =
1750 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1751 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1752 #ifdef AHC_DEBUG
1753 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1754 ahc_print_path(ahc, scb);
1755 printk("Set CAM_UNCOR_PARITY\n");
1756 }
1757 #endif
1758 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1759 #ifdef AHC_REPORT_UNDERFLOWS
1760 /*
1761 * This code is disabled by default as some
1762 * clients of the SCSI system do not properly
1763 * initialize the underflow parameter. This
1764 * results in spurious termination of commands
1765 * that complete as expected (e.g. underflow is
1766 * allowed as command can return variable amounts
1767 * of data.
1768 */
1769 } else if (amount_xferred < scb->io_ctx->underflow) {
1770 u_int i;
1771
1772 ahc_print_path(ahc, scb);
1773 printk("CDB:");
1774 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1775 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1776 printk("\n");
1777 ahc_print_path(ahc, scb);
1778 printk("Saw underflow (%ld of %ld bytes). "
1779 "Treated as error\n",
1780 ahc_get_residual(scb),
1781 ahc_get_transfer_length(scb));
1782 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1783 #endif
1784 } else {
1785 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1786 }
1787 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1788 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1789 }
1790
1791 if (dev->openings == 1
1792 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1793 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1794 dev->tag_success_count++;
1795 /*
1796 * Some devices deal with temporary internal resource
1797 * shortages by returning queue full. When the queue
1798 * full occurrs, we throttle back. Slowly try to get
1799 * back to our previous queue depth.
1800 */
1801 if ((dev->openings + dev->active) < dev->maxtags
1802 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1803 dev->tag_success_count = 0;
1804 dev->openings++;
1805 }
1806
1807 if (dev->active == 0)
1808 dev->commands_since_idle_or_otag = 0;
1809
1810 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1811 printk("Recovery SCB completes\n");
1812 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1813 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1814 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1815
1816 if (ahc->platform_data->eh_done)
1817 complete(ahc->platform_data->eh_done);
1818 }
1819
1820 ahc_free_scb(ahc, scb);
1821 ahc_linux_queue_cmd_complete(ahc, cmd);
1822 }
1823
1824 static void
1825 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
1826 struct scsi_device *sdev, struct scb *scb)
1827 {
1828 struct ahc_devinfo devinfo;
1829 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1830
1831 ahc_compile_devinfo(&devinfo,
1832 ahc->our_id,
1833 sdev->sdev_target->id, sdev->lun,
1834 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1835 ROLE_INITIATOR);
1836
1837 /*
1838 * We don't currently trust the mid-layer to
1839 * properly deal with queue full or busy. So,
1840 * when one occurs, we tell the mid-layer to
1841 * unconditionally requeue the command to us
1842 * so that we can retry it ourselves. We also
1843 * implement our own throttling mechanism so
1844 * we don't clobber the device with too many
1845 * commands.
1846 */
1847 switch (ahc_get_scsi_status(scb)) {
1848 default:
1849 break;
1850 case SCSI_STATUS_CHECK_COND:
1851 case SCSI_STATUS_CMD_TERMINATED:
1852 {
1853 struct scsi_cmnd *cmd;
1854
1855 /*
1856 * Copy sense information to the OS's cmd
1857 * structure if it is available.
1858 */
1859 cmd = scb->io_ctx;
1860 if (scb->flags & SCB_SENSE) {
1861 u_int sense_size;
1862
1863 sense_size = min(sizeof(struct scsi_sense_data)
1864 - ahc_get_sense_residual(scb),
1865 (u_long)SCSI_SENSE_BUFFERSIZE);
1866 memcpy(cmd->sense_buffer,
1867 ahc_get_sense_buf(ahc, scb), sense_size);
1868 if (sense_size < SCSI_SENSE_BUFFERSIZE)
1869 memset(&cmd->sense_buffer[sense_size], 0,
1870 SCSI_SENSE_BUFFERSIZE - sense_size);
1871 cmd->result |= (DRIVER_SENSE << 24);
1872 #ifdef AHC_DEBUG
1873 if (ahc_debug & AHC_SHOW_SENSE) {
1874 int i;
1875
1876 printk("Copied %d bytes of sense data:",
1877 sense_size);
1878 for (i = 0; i < sense_size; i++) {
1879 if ((i & 0xF) == 0)
1880 printk("\n");
1881 printk("0x%x ", cmd->sense_buffer[i]);
1882 }
1883 printk("\n");
1884 }
1885 #endif
1886 }
1887 break;
1888 }
1889 case SCSI_STATUS_QUEUE_FULL:
1890 {
1891 /*
1892 * By the time the core driver has returned this
1893 * command, all other commands that were queued
1894 * to us but not the device have been returned.
1895 * This ensures that dev->active is equal to
1896 * the number of commands actually queued to
1897 * the device.
1898 */
1899 dev->tag_success_count = 0;
1900 if (dev->active != 0) {
1901 /*
1902 * Drop our opening count to the number
1903 * of commands currently outstanding.
1904 */
1905 dev->openings = 0;
1906 /*
1907 ahc_print_path(ahc, scb);
1908 printk("Dropping tag count to %d\n", dev->active);
1909 */
1910 if (dev->active == dev->tags_on_last_queuefull) {
1911
1912 dev->last_queuefull_same_count++;
1913 /*
1914 * If we repeatedly see a queue full
1915 * at the same queue depth, this
1916 * device has a fixed number of tag
1917 * slots. Lock in this tag depth
1918 * so we stop seeing queue fulls from
1919 * this device.
1920 */
1921 if (dev->last_queuefull_same_count
1922 == AHC_LOCK_TAGS_COUNT) {
1923 dev->maxtags = dev->active;
1924 ahc_print_path(ahc, scb);
1925 printk("Locking max tag count at %d\n",
1926 dev->active);
1927 }
1928 } else {
1929 dev->tags_on_last_queuefull = dev->active;
1930 dev->last_queuefull_same_count = 0;
1931 }
1932 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1933 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
1934 ahc_platform_set_tags(ahc, sdev, &devinfo,
1935 (dev->flags & AHC_DEV_Q_BASIC)
1936 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1937 break;
1938 }
1939 /*
1940 * Drop down to a single opening, and treat this
1941 * as if the target returned BUSY SCSI status.
1942 */
1943 dev->openings = 1;
1944 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
1945 ahc_platform_set_tags(ahc, sdev, &devinfo,
1946 (dev->flags & AHC_DEV_Q_BASIC)
1947 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1948 break;
1949 }
1950 }
1951 }
1952
1953 static void
1954 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1955 {
1956 /*
1957 * Map CAM error codes into Linux Error codes. We
1958 * avoid the conversion so that the DV code has the
1959 * full error information available when making
1960 * state change decisions.
1961 */
1962 {
1963 u_int new_status;
1964
1965 switch (ahc_cmd_get_transaction_status(cmd)) {
1966 case CAM_REQ_INPROG:
1967 case CAM_REQ_CMP:
1968 case CAM_SCSI_STATUS_ERROR:
1969 new_status = DID_OK;
1970 break;
1971 case CAM_REQ_ABORTED:
1972 new_status = DID_ABORT;
1973 break;
1974 case CAM_BUSY:
1975 new_status = DID_BUS_BUSY;
1976 break;
1977 case CAM_REQ_INVALID:
1978 case CAM_PATH_INVALID:
1979 new_status = DID_BAD_TARGET;
1980 break;
1981 case CAM_SEL_TIMEOUT:
1982 new_status = DID_NO_CONNECT;
1983 break;
1984 case CAM_SCSI_BUS_RESET:
1985 case CAM_BDR_SENT:
1986 new_status = DID_RESET;
1987 break;
1988 case CAM_UNCOR_PARITY:
1989 new_status = DID_PARITY;
1990 break;
1991 case CAM_CMD_TIMEOUT:
1992 new_status = DID_TIME_OUT;
1993 break;
1994 case CAM_UA_ABORT:
1995 case CAM_REQ_CMP_ERR:
1996 case CAM_AUTOSENSE_FAIL:
1997 case CAM_NO_HBA:
1998 case CAM_DATA_RUN_ERR:
1999 case CAM_UNEXP_BUSFREE:
2000 case CAM_SEQUENCE_FAIL:
2001 case CAM_CCB_LEN_ERR:
2002 case CAM_PROVIDE_FAIL:
2003 case CAM_REQ_TERMIO:
2004 case CAM_UNREC_HBA_ERROR:
2005 case CAM_REQ_TOO_BIG:
2006 new_status = DID_ERROR;
2007 break;
2008 case CAM_REQUEUE_REQ:
2009 new_status = DID_REQUEUE;
2010 break;
2011 default:
2012 /* We should never get here */
2013 new_status = DID_ERROR;
2014 break;
2015 }
2016
2017 ahc_cmd_set_transaction_status(cmd, new_status);
2018 }
2019
2020 cmd->scsi_done(cmd);
2021 }
2022
2023 static void
2024 ahc_linux_freeze_simq(struct ahc_softc *ahc)
2025 {
2026 unsigned long s;
2027
2028 ahc_lock(ahc, &s);
2029 ahc->platform_data->qfrozen++;
2030 if (ahc->platform_data->qfrozen == 1) {
2031 scsi_block_requests(ahc->platform_data->host);
2032
2033 /* XXX What about Twin channels? */
2034 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2035 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2036 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2037 }
2038 ahc_unlock(ahc, &s);
2039 }
2040
2041 static void
2042 ahc_linux_release_simq(struct ahc_softc *ahc)
2043 {
2044 u_long s;
2045 int unblock_reqs;
2046
2047 unblock_reqs = 0;
2048 ahc_lock(ahc, &s);
2049 if (ahc->platform_data->qfrozen > 0)
2050 ahc->platform_data->qfrozen--;
2051 if (ahc->platform_data->qfrozen == 0)
2052 unblock_reqs = 1;
2053 ahc_unlock(ahc, &s);
2054 /*
2055 * There is still a race here. The mid-layer
2056 * should keep its own freeze count and use
2057 * a bottom half handler to run the queues
2058 * so we can unblock with our own lock held.
2059 */
2060 if (unblock_reqs)
2061 scsi_unblock_requests(ahc->platform_data->host);
2062 }
2063
2064 static int
2065 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2066 {
2067 struct ahc_softc *ahc;
2068 struct ahc_linux_device *dev;
2069 struct scb *pending_scb;
2070 u_int saved_scbptr;
2071 u_int active_scb_index;
2072 u_int last_phase;
2073 u_int saved_scsiid;
2074 u_int cdb_byte;
2075 int retval;
2076 int was_paused;
2077 int paused;
2078 int wait;
2079 int disconnected;
2080 unsigned long flags;
2081
2082 pending_scb = NULL;
2083 paused = FALSE;
2084 wait = FALSE;
2085 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2086
2087 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
2088 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2089
2090 printk("CDB:");
2091 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2092 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2093 printk("\n");
2094
2095 ahc_lock(ahc, &flags);
2096
2097 /*
2098 * First determine if we currently own this command.
2099 * Start by searching the device queue. If not found
2100 * there, check the pending_scb list. If not found
2101 * at all, and the system wanted us to just abort the
2102 * command, return success.
2103 */
2104 dev = scsi_transport_device_data(cmd->device);
2105
2106 if (dev == NULL) {
2107 /*
2108 * No target device for this command exists,
2109 * so we must not still own the command.
2110 */
2111 printk("%s:%d:%d:%d: Is not an active device\n",
2112 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2113 (u8)cmd->device->lun);
2114 retval = SUCCESS;
2115 goto no_cmd;
2116 }
2117
2118 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2119 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2120 cmd->device->channel + 'A',
2121 (u8)cmd->device->lun,
2122 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2123 printk("%s:%d:%d:%d: Command found on untagged queue\n",
2124 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2125 (u8)cmd->device->lun);
2126 retval = SUCCESS;
2127 goto done;
2128 }
2129
2130 /*
2131 * See if we can find a matching cmd in the pending list.
2132 */
2133 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2134 if (pending_scb->io_ctx == cmd)
2135 break;
2136 }
2137
2138 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2139
2140 /* Any SCB for this device will do for a target reset */
2141 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2142 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2143 scmd_channel(cmd) + 'A',
2144 CAM_LUN_WILDCARD,
2145 SCB_LIST_NULL, ROLE_INITIATOR))
2146 break;
2147 }
2148 }
2149
2150 if (pending_scb == NULL) {
2151 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2152 goto no_cmd;
2153 }
2154
2155 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2156 /*
2157 * We can't queue two recovery actions using the same SCB
2158 */
2159 retval = FAILED;
2160 goto done;
2161 }
2162
2163 /*
2164 * Ensure that the card doesn't do anything
2165 * behind our back and that we didn't "just" miss
2166 * an interrupt that would affect this cmd.
2167 */
2168 was_paused = ahc_is_paused(ahc);
2169 ahc_pause_and_flushwork(ahc);
2170 paused = TRUE;
2171
2172 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2173 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2174 goto no_cmd;
2175 }
2176
2177 printk("%s: At time of recovery, card was %spaused\n",
2178 ahc_name(ahc), was_paused ? "" : "not ");
2179 ahc_dump_card_state(ahc);
2180
2181 disconnected = TRUE;
2182 if (flag == SCB_ABORT) {
2183 if (ahc_search_qinfifo(ahc, cmd->device->id,
2184 cmd->device->channel + 'A',
2185 cmd->device->lun,
2186 pending_scb->hscb->tag,
2187 ROLE_INITIATOR, CAM_REQ_ABORTED,
2188 SEARCH_COMPLETE) > 0) {
2189 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2190 ahc_name(ahc), cmd->device->channel,
2191 cmd->device->id, (u8)cmd->device->lun);
2192 retval = SUCCESS;
2193 goto done;
2194 }
2195 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2196 cmd->device->channel + 'A',
2197 cmd->device->lun,
2198 pending_scb->hscb->tag,
2199 ROLE_INITIATOR, /*status*/0,
2200 SEARCH_COUNT) > 0) {
2201 disconnected = FALSE;
2202 }
2203
2204 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2205 struct scb *bus_scb;
2206
2207 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2208 if (bus_scb == pending_scb)
2209 disconnected = FALSE;
2210 else if (flag != SCB_ABORT
2211 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2212 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2213 disconnected = FALSE;
2214 }
2215
2216 /*
2217 * At this point, pending_scb is the scb associated with the
2218 * passed in command. That command is currently active on the
2219 * bus, is in the disconnected state, or we're hoping to find
2220 * a command for the same target active on the bus to abuse to
2221 * send a BDR. Queue the appropriate message based on which of
2222 * these states we are in.
2223 */
2224 last_phase = ahc_inb(ahc, LASTPHASE);
2225 saved_scbptr = ahc_inb(ahc, SCBPTR);
2226 active_scb_index = ahc_inb(ahc, SCB_TAG);
2227 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2228 if (last_phase != P_BUSFREE
2229 && (pending_scb->hscb->tag == active_scb_index
2230 || (flag == SCB_DEVICE_RESET
2231 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
2232
2233 /*
2234 * We're active on the bus, so assert ATN
2235 * and hope that the target responds.
2236 */
2237 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2238 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2239 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2240 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2241 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2242 wait = TRUE;
2243 } else if (disconnected) {
2244
2245 /*
2246 * Actually re-queue this SCB in an attempt
2247 * to select the device before it reconnects.
2248 * In either case (selection or reselection),
2249 * we will now issue the approprate message
2250 * to the timed-out device.
2251 *
2252 * Set the MK_MESSAGE control bit indicating
2253 * that we desire to send a message. We
2254 * also set the disconnected flag since
2255 * in the paging case there is no guarantee
2256 * that our SCB control byte matches the
2257 * version on the card. We don't want the
2258 * sequencer to abort the command thinking
2259 * an unsolicited reselection occurred.
2260 */
2261 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2262 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2263
2264 /*
2265 * Remove any cached copy of this SCB in the
2266 * disconnected list in preparation for the
2267 * queuing of our abort SCB. We use the
2268 * same element in the SCB, SCB_NEXT, for
2269 * both the qinfifo and the disconnected list.
2270 */
2271 ahc_search_disc_list(ahc, cmd->device->id,
2272 cmd->device->channel + 'A',
2273 cmd->device->lun, pending_scb->hscb->tag,
2274 /*stop_on_first*/TRUE,
2275 /*remove*/TRUE,
2276 /*save_state*/FALSE);
2277
2278 /*
2279 * In the non-paging case, the sequencer will
2280 * never re-reference the in-core SCB.
2281 * To make sure we are notified during
2282 * reselection, set the MK_MESSAGE flag in
2283 * the card's copy of the SCB.
2284 */
2285 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2286 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2287 ahc_outb(ahc, SCB_CONTROL,
2288 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2289 }
2290
2291 /*
2292 * Clear out any entries in the QINFIFO first
2293 * so we are the next SCB for this target
2294 * to run.
2295 */
2296 ahc_search_qinfifo(ahc, cmd->device->id,
2297 cmd->device->channel + 'A',
2298 cmd->device->lun, SCB_LIST_NULL,
2299 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2300 SEARCH_COMPLETE);
2301 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2302 ahc_outb(ahc, SCBPTR, saved_scbptr);
2303 ahc_print_path(ahc, pending_scb);
2304 printk("Device is disconnected, re-queuing SCB\n");
2305 wait = TRUE;
2306 } else {
2307 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2308 retval = FAILED;
2309 goto done;
2310 }
2311
2312 no_cmd:
2313 /*
2314 * Our assumption is that if we don't have the command, no
2315 * recovery action was required, so we return success. Again,
2316 * the semantics of the mid-layer recovery engine are not
2317 * well defined, so this may change in time.
2318 */
2319 retval = SUCCESS;
2320 done:
2321 if (paused)
2322 ahc_unpause(ahc);
2323 if (wait) {
2324 DECLARE_COMPLETION_ONSTACK(done);
2325
2326 ahc->platform_data->eh_done = &done;
2327 ahc_unlock(ahc, &flags);
2328
2329 printk("Recovery code sleeping\n");
2330 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2331 ahc_lock(ahc, &flags);
2332 ahc->platform_data->eh_done = NULL;
2333 ahc_unlock(ahc, &flags);
2334
2335 printk("Timer Expired\n");
2336 retval = FAILED;
2337 }
2338 printk("Recovery code awake\n");
2339 } else
2340 ahc_unlock(ahc, &flags);
2341 return (retval);
2342 }
2343
2344 void
2345 ahc_platform_dump_card_state(struct ahc_softc *ahc)
2346 {
2347 }
2348
2349 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2350 {
2351 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2352 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2353 struct ahc_devinfo devinfo;
2354 unsigned long flags;
2355
2356 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2357 starget->channel + 'A', ROLE_INITIATOR);
2358 ahc_lock(ahc, &flags);
2359 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2360 ahc_unlock(ahc, &flags);
2361 }
2362
2363 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2364 {
2365 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2366 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2367 struct ahc_tmode_tstate *tstate;
2368 struct ahc_initiator_tinfo *tinfo
2369 = ahc_fetch_transinfo(ahc,
2370 starget->channel + 'A',
2371 shost->this_id, starget->id, &tstate);
2372 struct ahc_devinfo devinfo;
2373 unsigned int ppr_options = tinfo->goal.ppr_options;
2374 unsigned long flags;
2375 unsigned long offset = tinfo->goal.offset;
2376 const struct ahc_syncrate *syncrate;
2377
2378 if (offset == 0)
2379 offset = MAX_OFFSET;
2380
2381 if (period < 9)
2382 period = 9; /* 12.5ns is our minimum */
2383 if (period == 9) {
2384 if (spi_max_width(starget))
2385 ppr_options |= MSG_EXT_PPR_DT_REQ;
2386 else
2387 /* need wide for DT and need DT for 12.5 ns */
2388 period = 10;
2389 }
2390
2391 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2392 starget->channel + 'A', ROLE_INITIATOR);
2393
2394 /* all PPR requests apart from QAS require wide transfers */
2395 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2396 if (spi_width(starget) == 0)
2397 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2398 }
2399
2400 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2401 ahc_lock(ahc, &flags);
2402 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2403 ppr_options, AHC_TRANS_GOAL, FALSE);
2404 ahc_unlock(ahc, &flags);
2405 }
2406
2407 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2408 {
2409 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2410 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2411 struct ahc_tmode_tstate *tstate;
2412 struct ahc_initiator_tinfo *tinfo
2413 = ahc_fetch_transinfo(ahc,
2414 starget->channel + 'A',
2415 shost->this_id, starget->id, &tstate);
2416 struct ahc_devinfo devinfo;
2417 unsigned int ppr_options = 0;
2418 unsigned int period = 0;
2419 unsigned long flags;
2420 const struct ahc_syncrate *syncrate = NULL;
2421
2422 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2423 starget->channel + 'A', ROLE_INITIATOR);
2424 if (offset != 0) {
2425 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2426 period = tinfo->goal.period;
2427 ppr_options = tinfo->goal.ppr_options;
2428 }
2429 ahc_lock(ahc, &flags);
2430 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2431 ppr_options, AHC_TRANS_GOAL, FALSE);
2432 ahc_unlock(ahc, &flags);
2433 }
2434
2435 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2436 {
2437 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2438 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2439 struct ahc_tmode_tstate *tstate;
2440 struct ahc_initiator_tinfo *tinfo
2441 = ahc_fetch_transinfo(ahc,
2442 starget->channel + 'A',
2443 shost->this_id, starget->id, &tstate);
2444 struct ahc_devinfo devinfo;
2445 unsigned int ppr_options = tinfo->goal.ppr_options
2446 & ~MSG_EXT_PPR_DT_REQ;
2447 unsigned int period = tinfo->goal.period;
2448 unsigned int width = tinfo->goal.width;
2449 unsigned long flags;
2450 const struct ahc_syncrate *syncrate;
2451
2452 if (dt && spi_max_width(starget)) {
2453 ppr_options |= MSG_EXT_PPR_DT_REQ;
2454 if (!width)
2455 ahc_linux_set_width(starget, 1);
2456 } else if (period == 9)
2457 period = 10; /* if resetting DT, period must be >= 25ns */
2458
2459 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2460 starget->channel + 'A', ROLE_INITIATOR);
2461 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
2462 ahc_lock(ahc, &flags);
2463 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2464 ppr_options, AHC_TRANS_GOAL, FALSE);
2465 ahc_unlock(ahc, &flags);
2466 }
2467
2468 #if 0
2469 /* FIXME: This code claims to support IU and QAS. However, the actual
2470 * sequencer code and aic7xxx_core have no support for these parameters and
2471 * will get into a bad state if they're negotiated. Do not enable this
2472 * unless you know what you're doing */
2473 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2474 {
2475 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2476 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2477 struct ahc_tmode_tstate *tstate;
2478 struct ahc_initiator_tinfo *tinfo
2479 = ahc_fetch_transinfo(ahc,
2480 starget->channel + 'A',
2481 shost->this_id, starget->id, &tstate);
2482 struct ahc_devinfo devinfo;
2483 unsigned int ppr_options = tinfo->goal.ppr_options
2484 & ~MSG_EXT_PPR_QAS_REQ;
2485 unsigned int period = tinfo->goal.period;
2486 unsigned long flags;
2487 struct ahc_syncrate *syncrate;
2488
2489 if (qas)
2490 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2491
2492 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2493 starget->channel + 'A', ROLE_INITIATOR);
2494 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2495 ahc_lock(ahc, &flags);
2496 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2497 ppr_options, AHC_TRANS_GOAL, FALSE);
2498 ahc_unlock(ahc, &flags);
2499 }
2500
2501 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2502 {
2503 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2504 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2505 struct ahc_tmode_tstate *tstate;
2506 struct ahc_initiator_tinfo *tinfo
2507 = ahc_fetch_transinfo(ahc,
2508 starget->channel + 'A',
2509 shost->this_id, starget->id, &tstate);
2510 struct ahc_devinfo devinfo;
2511 unsigned int ppr_options = tinfo->goal.ppr_options
2512 & ~MSG_EXT_PPR_IU_REQ;
2513 unsigned int period = tinfo->goal.period;
2514 unsigned long flags;
2515 struct ahc_syncrate *syncrate;
2516
2517 if (iu)
2518 ppr_options |= MSG_EXT_PPR_IU_REQ;
2519
2520 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2521 starget->channel + 'A', ROLE_INITIATOR);
2522 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2523 ahc_lock(ahc, &flags);
2524 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2525 ppr_options, AHC_TRANS_GOAL, FALSE);
2526 ahc_unlock(ahc, &flags);
2527 }
2528 #endif
2529
2530 static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2531 {
2532 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
2533 unsigned long flags;
2534 u8 mode;
2535
2536 if (!(ahc->features & AHC_ULTRA2)) {
2537 /* non-LVD chipset, may not have SBLKCTL reg */
2538 spi_signalling(shost) =
2539 ahc->features & AHC_HVD ?
2540 SPI_SIGNAL_HVD :
2541 SPI_SIGNAL_SE;
2542 return;
2543 }
2544
2545 ahc_lock(ahc, &flags);
2546 ahc_pause(ahc);
2547 mode = ahc_inb(ahc, SBLKCTL);
2548 ahc_unpause(ahc);
2549 ahc_unlock(ahc, &flags);
2550
2551 if (mode & ENAB40)
2552 spi_signalling(shost) = SPI_SIGNAL_LVD;
2553 else if (mode & ENAB20)
2554 spi_signalling(shost) = SPI_SIGNAL_SE;
2555 else
2556 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2557 }
2558
2559 static struct spi_function_template ahc_linux_transport_functions = {
2560 .set_offset = ahc_linux_set_offset,
2561 .show_offset = 1,
2562 .set_period = ahc_linux_set_period,
2563 .show_period = 1,
2564 .set_width = ahc_linux_set_width,
2565 .show_width = 1,
2566 .set_dt = ahc_linux_set_dt,
2567 .show_dt = 1,
2568 #if 0
2569 .set_iu = ahc_linux_set_iu,
2570 .show_iu = 1,
2571 .set_qas = ahc_linux_set_qas,
2572 .show_qas = 1,
2573 #endif
2574 .get_signalling = ahc_linux_get_signalling,
2575 };
2576
2577
2578
2579 static int __init
2580 ahc_linux_init(void)
2581 {
2582 /*
2583 * If we've been passed any parameters, process them now.
2584 */
2585 if (aic7xxx)
2586 aic7xxx_setup(aic7xxx);
2587
2588 ahc_linux_transport_template =
2589 spi_attach_transport(&ahc_linux_transport_functions);
2590 if (!ahc_linux_transport_template)
2591 return -ENODEV;
2592
2593 scsi_transport_reserve_device(ahc_linux_transport_template,
2594 sizeof(struct ahc_linux_device));
2595
2596 ahc_linux_pci_init();
2597 ahc_linux_eisa_init();
2598 return 0;
2599 }
2600
2601 static void
2602 ahc_linux_exit(void)
2603 {
2604 ahc_linux_pci_exit();
2605 ahc_linux_eisa_exit();
2606 spi_release_transport(ahc_linux_transport_template);
2607 }
2608
2609 module_init(ahc_linux_init);
2610 module_exit(ahc_linux_exit);
Linux kernel - Deliverables
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