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[SCSI] aic7xxx: remove ahc_find_softc
[net-next-2.6.git] / drivers / scsi / aic7xxx / aic7xxx_osm.c
CommitLineData
1da177e4
LT		 1/*
2 * Adaptec AIC7xxx device driver for Linux.
3 *
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
5 *
6 * Copyright (c) 1994 John Aycock
7 * The University of Calgary Department of Computer Science.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
12 * any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, write to
21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
24 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
25 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
26 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
27 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
28 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
29 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
30 * ANSI SCSI-2 specification (draft 10c), ...
31 *
32 * --------------------------------------------------------------------------
33 *
34 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
35 *
36 * Substantially modified to include support for wide and twin bus
37 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
38 * SCB paging, and other rework of the code.
39 *
40 * --------------------------------------------------------------------------
41 * Copyright (c) 1994-2000 Justin T. Gibbs.
42 * Copyright (c) 2000-2001 Adaptec Inc.
43 * All rights reserved.
44 *
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
47 * are met:
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions, and the following disclaimer,
50 * without modification.
51 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
52 * substantially similar to the "NO WARRANTY" disclaimer below
53 * ("Disclaimer") and any redistribution must be conditioned upon
54 * including a substantially similar Disclaimer requirement for further
55 * binary redistribution.
56 * 3. Neither the names of the above-listed copyright holders nor the names
57 * of any contributors may be used to endorse or promote products derived
58 * from this software without specific prior written permission.
59 *
60 * Alternatively, this software may be distributed under the terms of the
61 * GNU General Public License ("GPL") version 2 as published by the Free
62 * Software Foundation.
63 *
64 * NO WARRANTY
65 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
66 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
67 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
68 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
69 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
73 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
74 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
75 * POSSIBILITY OF SUCH DAMAGES.
76 *
77 *---------------------------------------------------------------------------
78 *
79 * Thanks also go to (in alphabetical order) the following:
80 *
81 * Rory Bolt - Sequencer bug fixes
82 * Jay Estabrook - Initial DEC Alpha support
83 * Doug Ledford - Much needed abort/reset bug fixes
84 * Kai Makisara - DMAing of SCBs
85 *
86 * A Boot time option was also added for not resetting the scsi bus.
87 *
88 * Form: aic7xxx=extended
89 * aic7xxx=no_reset
90 * aic7xxx=verbose
91 *
92 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
93 *
94 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
95 */
96
97/*
98 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
99 *
100 * Copyright (c) 1997-1999 Doug Ledford
101 *
102 * These changes are released under the same licensing terms as the FreeBSD
103 * driver written by Justin Gibbs. Please see his Copyright notice above
104 * for the exact terms and conditions covering my changes as well as the
105 * warranty statement.
106 *
107 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
108 * but are not limited to:
109 *
110 * 1: Import of the latest FreeBSD sequencer code for this driver
111 * 2: Modification of kernel code to accommodate different sequencer semantics
112 * 3: Extensive changes throughout kernel portion of driver to improve
113 * abort/reset processing and error hanndling
114 * 4: Other work contributed by various people on the Internet
115 * 5: Changes to printk information and verbosity selection code
116 * 6: General reliability related changes, especially in IRQ management
117 * 7: Modifications to the default probe/attach order for supported cards
118 * 8: SMP friendliness has been improved
119 *
120 */
121
122#include "aic7xxx_osm.h"
123#include "aic7xxx_inline.h"
124#include <scsi/scsicam.h>
92d161c3
JB		 125
126static struct scsi_transport_template *ahc_linux_transport_template = NULL;
1da177e4
LT		 127
128/*
129 * Include aiclib.c as part of our
130 * "module dependencies are hard" work around.
131 */
132#include "aiclib.c"
133
134#include <linux/init.h> /* __setup */
1da177e4
LT		 135#include <linux/mm.h> /* For fetching system memory size */
136#include <linux/blkdev.h> /* For block_size() */
137#include <linux/delay.h> /* For ssleep/msleep */
138
139/*
140 * Lock protecting manipulation of the ahc softc list.
141 */
142spinlock_t ahc_list_spinlock;
143
1da177e4
LT		 144/*
145 * Set this to the delay in seconds after SCSI bus reset.
146 * Note, we honor this only for the initial bus reset.
147 * The scsi error recovery code performs its own bus settle
148 * delay handling for error recovery actions.
149 */
150#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
151#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
152#else
153#define AIC7XXX_RESET_DELAY 5000
154#endif
155
156/*
157 * Control collection of SCSI transfer statistics for the /proc filesystem.
158 *
159 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
160 * NOTE: This does affect performance since it has to maintain statistics.
161 */
162#ifdef CONFIG_AIC7XXX_PROC_STATS
163#define AIC7XXX_PROC_STATS
164#endif
165
166/*
167 * To change the default number of tagged transactions allowed per-device,
168 * add a line to the lilo.conf file like:
169 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
170 * which will result in the first four devices on the first two
171 * controllers being set to a tagged queue depth of 32.
172 *
173 * The tag_commands is an array of 16 to allow for wide and twin adapters.
174 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
175 * for channel 1.
176 */
177typedef struct {
178 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
179} adapter_tag_info_t;
180
181/*
182 * Modify this as you see fit for your system.
183 *
184 * 0 tagged queuing disabled
185 * 1 <= n <= 253 n == max tags ever dispatched.
186 *
187 * The driver will throttle the number of commands dispatched to a
188 * device if it returns queue full. For devices with a fixed maximum
189 * queue depth, the driver will eventually determine this depth and
190 * lock it in (a console message is printed to indicate that a lock
191 * has occurred). On some devices, queue full is returned for a temporary
192 * resource shortage. These devices will return queue full at varying
193 * depths. The driver will throttle back when the queue fulls occur and
194 * attempt to slowly increase the depth over time as the device recovers
195 * from the resource shortage.
196 *
197 * In this example, the first line will disable tagged queueing for all
198 * the devices on the first probed aic7xxx adapter.
199 *
200 * The second line enables tagged queueing with 4 commands/LUN for IDs
201 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
202 * driver to attempt to use up to 64 tags for ID 1.
203 *
204 * The third line is the same as the first line.
205 *
206 * The fourth line disables tagged queueing for devices 0 and 3. It
207 * enables tagged queueing for the other IDs, with 16 commands/LUN
208 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
209 * IDs 2, 5-7, and 9-15.
210 */
211
212/*
213 * NOTE: The below structure is for reference only, the actual structure
214 * to modify in order to change things is just below this comment block.
215adapter_tag_info_t aic7xxx_tag_info[] =
216{
217 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
218 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
219 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
220 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
221};
222*/
223
224#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
225#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
226#else
227#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
228#endif
229
230#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
231 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
232 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
233 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
234 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
235 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
236 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
237 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
238 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
239}
240
241/*
242 * By default, use the number of commands specified by
243 * the users kernel configuration.
244 */
245static adapter_tag_info_t aic7xxx_tag_info[] =
246{
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 {AIC7XXX_CONFIGED_TAG_COMMANDS},
255 {AIC7XXX_CONFIGED_TAG_COMMANDS},
256 {AIC7XXX_CONFIGED_TAG_COMMANDS},
257 {AIC7XXX_CONFIGED_TAG_COMMANDS},
258 {AIC7XXX_CONFIGED_TAG_COMMANDS},
259 {AIC7XXX_CONFIGED_TAG_COMMANDS},
260 {AIC7XXX_CONFIGED_TAG_COMMANDS},
261 {AIC7XXX_CONFIGED_TAG_COMMANDS},
262 {AIC7XXX_CONFIGED_TAG_COMMANDS}
263};
264
1da177e4
LT		 265/*
266 * There should be a specific return value for this in scsi.h, but
267 * it seems that most drivers ignore it.
268 */
269#define DID_UNDERFLOW DID_ERROR
270
271void
272ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
273{
274 printk("(scsi%d:%c:%d:%d): ",
275 ahc->platform_data->host->host_no,
276 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
277 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
278 scb != NULL ? SCB_GET_LUN(scb) : -1);
279}
280
281/*
282 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
283 * cards in the system. This should be fixed. Exceptions to this
284 * rule are noted in the comments.
285 */
286
287/*
288 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
289 * has no effect on any later resets that might occur due to things like
290 * SCSI bus timeouts.
291 */
292static uint32_t aic7xxx_no_reset;
293
294/*
295 * Certain PCI motherboards will scan PCI devices from highest to lowest,
296 * others scan from lowest to highest, and they tend to do all kinds of
297 * strange things when they come into contact with PCI bridge chips. The
298 * net result of all this is that the PCI card that is actually used to boot
299 * the machine is very hard to detect. Most motherboards go from lowest
300 * PCI slot number to highest, and the first SCSI controller found is the
301 * one you boot from. The only exceptions to this are when a controller
302 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
303 * from lowest PCI slot number to highest PCI slot number. We also force
304 * all controllers with their BIOS disabled to the end of the list. This
305 * works on *almost* all computers. Where it doesn't work, we have this
306 * option. Setting this option to non-0 will reverse the order of the sort
307 * to highest first, then lowest, but will still leave cards with their BIOS
308 * disabled at the very end. That should fix everyone up unless there are
309 * really strange cirumstances.
310 */
311static uint32_t aic7xxx_reverse_scan;
312
313/*
314 * Should we force EXTENDED translation on a controller.
315 * 0 == Use whatever is in the SEEPROM or default to off
316 * 1 == Use whatever is in the SEEPROM or default to on
317 */
318static uint32_t aic7xxx_extended;
319
320/*
321 * PCI bus parity checking of the Adaptec controllers. This is somewhat
322 * dubious at best. To my knowledge, this option has never actually
323 * solved a PCI parity problem, but on certain machines with broken PCI
324 * chipset configurations where stray PCI transactions with bad parity are
325 * the norm rather than the exception, the error messages can be overwelming.
326 * It's included in the driver for completeness.
327 * 0 = Shut off PCI parity check
328 * non-0 = reverse polarity pci parity checking
329 */
330static uint32_t aic7xxx_pci_parity = ~0;
331
332/*
333 * Certain newer motherboards have put new PCI based devices into the
334 * IO spaces that used to typically be occupied by VLB or EISA cards.
335 * This overlap can cause these newer motherboards to lock up when scanned
336 * for older EISA and VLB devices. Setting this option to non-0 will
337 * cause the driver to skip scanning for any VLB or EISA controllers and
338 * only support the PCI controllers. NOTE: this means that if the kernel
339 * os compiled with PCI support disabled, then setting this to non-0
340 * would result in never finding any devices :)
341 */
342#ifndef CONFIG_AIC7XXX_PROBE_EISA_VL
343uint32_t aic7xxx_probe_eisa_vl;
344#else
345uint32_t aic7xxx_probe_eisa_vl = ~0;
346#endif
347
348/*
349 * There are lots of broken chipsets in the world. Some of them will
350 * violate the PCI spec when we issue byte sized memory writes to our
351 * controller. I/O mapped register access, if allowed by the given
352 * platform, will work in almost all cases.
353 */
354uint32_t aic7xxx_allow_memio = ~0;
355
356/*
357 * aic7xxx_detect() has been run, so register all device arrivals
358 * immediately with the system rather than deferring to the sorted
359 * attachment performed by aic7xxx_detect().
360 */
361int aic7xxx_detect_complete;
362
363/*
364 * So that we can set how long each device is given as a selection timeout.
365 * The table of values goes like this:
366 * 0 - 256ms
367 * 1 - 128ms
368 * 2 - 64ms
369 * 3 - 32ms
370 * We default to 256ms because some older devices need a longer time
371 * to respond to initial selection.
372 */
373static uint32_t aic7xxx_seltime;
374
375/*
376 * Certain devices do not perform any aging on commands. Should the
377 * device be saturated by commands in one portion of the disk, it is
378 * possible for transactions on far away sectors to never be serviced.
379 * To handle these devices, we can periodically send an ordered tag to
380 * force all outstanding transactions to be serviced prior to a new
381 * transaction.
382 */
383uint32_t aic7xxx_periodic_otag;
384
385/*
386 * Module information and settable options.
387 */
388static char *aic7xxx = NULL;
389
390MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
391MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
392MODULE_LICENSE("Dual BSD/GPL");
393MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
394module_param(aic7xxx, charp, 0444);
395MODULE_PARM_DESC(aic7xxx,
396"period delimited, options string.\n"
397" verbose Enable verbose/diagnostic logging\n"
398" allow_memio Allow device registers to be memory mapped\n"
399" debug Bitmask of debug values to enable\n"
400" no_probe Toggle EISA/VLB controller probing\n"
401" probe_eisa_vl Toggle EISA/VLB controller probing\n"
402" no_reset Supress initial bus resets\n"
403" extended Enable extended geometry on all controllers\n"
404" periodic_otag Send an ordered tagged transaction\n"
405" periodically to prevent tag starvation.\n"
406" This may be required by some older disk\n"
407" drives or RAID arrays.\n"
408" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
409" tag_info:<tag_str> Set per-target tag depth\n"
410" global_tag_depth:<int> Global tag depth for every target\n"
411" on every bus\n"
1da177e4
LT		 412" seltime:<int> Selection Timeout\n"
413" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
414"\n"
415" Sample /etc/modprobe.conf line:\n"
416" Toggle EISA/VLB probing\n"
417" Set tag depth on Controller 1/Target 1 to 10 tags\n"
418" Shorten the selection timeout to 128ms\n"
419"\n"
420" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
421);
422
423static void ahc_linux_handle_scsi_status(struct ahc_softc *,
b1abb4d6 424 struct scsi_device *,
1da177e4
LT		 425 struct scb *);
426static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
013791ee 427 struct scsi_cmnd *cmd);
1da177e4
LT		 428static void ahc_linux_sem_timeout(u_long arg);
429static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
430static void ahc_linux_release_simq(u_long arg);
013791ee 431static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
1da177e4 432static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
1da177e4
LT		 433static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
434 struct ahc_devinfo *devinfo);
b1abb4d6 435static void ahc_linux_device_queue_depth(struct scsi_device *);
e4e360c3
JB		 436static int ahc_linux_run_command(struct ahc_softc*,
437 struct ahc_linux_device *,
438 struct scsi_cmnd *);
1da177e4
LT		 439static void ahc_linux_setup_tag_info_global(char *p);
440static aic_option_callback_t ahc_linux_setup_tag_info;
1da177e4
LT		 441static int aic7xxx_setup(char *s);
442static int ahc_linux_next_unit(void);
1da177e4
LT		 443
444/********************************* Inlines ************************************/
1da177e4
LT		 445static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
446
447static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
448 struct ahc_dma_seg *sg,
449 dma_addr_t addr, bus_size_t len);
450
1da177e4
LT		 451static __inline void
452ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
453{
013791ee 454 struct scsi_cmnd *cmd;
1da177e4
LT		 455
456 cmd = scb->io_ctx;
457 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
458 if (cmd->use_sg != 0) {
459 struct scatterlist *sg;
460
461 sg = (struct scatterlist *)cmd->request_buffer;
462 pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg,
be7db055 463 cmd->sc_data_direction);
1da177e4
LT		 464 } else if (cmd->request_bufflen != 0) {
465 pci_unmap_single(ahc->dev_softc,
466 scb->platform_data->buf_busaddr,
467 cmd->request_bufflen,
be7db055 468 cmd->sc_data_direction);
1da177e4
LT		 469 }
470}
471
472static __inline int
473ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
474 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
475{
476 int consumed;
477
478 if ((scb->sg_count + 1) > AHC_NSEG)
479 panic("Too few segs for dma mapping. "
480 "Increase AHC_NSEG\n");
481
482 consumed = 1;
483 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
484 scb->platform_data->xfer_len += len;
485
486 if (sizeof(dma_addr_t) > 4
487 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
488 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
489
490 sg->len = ahc_htole32(len);
491 return (consumed);
492}
493
1da177e4
LT		 494/*
495 * Try to detect an Adaptec 7XXX controller.
496 */
497static int
013791ee 498ahc_linux_detect(struct scsi_host_template *template)
1da177e4
LT		 499{
500 struct ahc_softc *ahc;
501 int found = 0;
502
1da177e4
LT		 503 /*
504 * Sanity checking of Linux SCSI data structures so
505 * that some of our hacks^H^H^H^H^Hassumptions aren't
506 * violated.
507 */
508 if (offsetof(struct ahc_cmd_internal, end)
509 > offsetof(struct scsi_cmnd, host_scribble)) {
510 printf("ahc_linux_detect: SCSI data structures changed.\n");
511 printf("ahc_linux_detect: Unable to attach\n");
512 return (0);
513 }
1da177e4
LT		 514 /*
515 * If we've been passed any parameters, process them now.
516 */
517 if (aic7xxx)
518 aic7xxx_setup(aic7xxx);
519
520 template->proc_name = "aic7xxx";
521
522 /*
523 * Initialize our softc list lock prior to
524 * probing for any adapters.
525 */
526 ahc_list_lockinit();
527
528 found = ahc_linux_pci_init();
529 if (!ahc_linux_eisa_init())
530 found++;
531
532 /*
533 * Register with the SCSI layer all
534 * controllers we've found.
535 */
536 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
537
538 if (ahc_linux_register_host(ahc, template) == 0)
539 found++;
540 }
541
1da177e4
LT		 542 aic7xxx_detect_complete++;
543
544 return (found);
545}
546
1da177e4
LT		 547/*
548 * Return a string describing the driver.
549 */
550static const char *
551ahc_linux_info(struct Scsi_Host *host)
552{
553 static char buffer[512];
554 char ahc_info[256];
555 char *bp;
556 struct ahc_softc *ahc;
557
558 bp = &buffer[0];
559 ahc = *(struct ahc_softc **)host->hostdata;
560 memset(bp, 0, sizeof(buffer));
561 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
562 strcat(bp, AIC7XXX_DRIVER_VERSION);
563 strcat(bp, "\n");
564 strcat(bp, " <");
565 strcat(bp, ahc->description);
566 strcat(bp, ">\n");
567 strcat(bp, " ");
568 ahc_controller_info(ahc, ahc_info);
569 strcat(bp, ahc_info);
570 strcat(bp, "\n");
571
572 return (bp);
573}
574
575/*
576 * Queue an SCB to the controller.
577 */
578static int
013791ee 579ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
1da177e4
LT		 580{
581 struct ahc_softc *ahc;
b1abb4d6 582 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
1da177e4
LT		 583
584 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
585
586 /*
587 * Save the callback on completion function.
588 */
589 cmd->scsi_done = scsi_done;
590
1da177e4
LT		 591 /*
592 * Close the race of a command that was in the process of
593 * being queued to us just as our simq was frozen. Let
594 * DV commands through so long as we are only frozen to
595 * perform DV.
596 */
e4e360c3
JB		 597 if (ahc->platform_data->qfrozen != 0)
598 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 599
1da177e4 600 cmd->result = CAM_REQ_INPROG << 16;
e4e360c3
JB		 601
602 return ahc_linux_run_command(ahc, dev, cmd);
1da177e4
LT		 603}
604
b1abb4d6
JB		 605static inline struct scsi_target **
606ahc_linux_target_in_softc(struct scsi_target *starget)
1da177e4 607{
b1abb4d6
JB		 608 struct ahc_softc *ahc =
609 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
fb3089df 610 unsigned int target_offset;
b1abb4d6
JB		 611
612 target_offset = starget->id;
613 if (starget->channel != 0)
614 target_offset += 8;
615
616 return &ahc->platform_data->starget[target_offset];
617}
618
619static int
620ahc_linux_target_alloc(struct scsi_target *starget)
621{
622 struct ahc_softc *ahc =
623 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
624 struct seeprom_config *sc = ahc->seep_config;
fb3089df 625 unsigned long flags;
b1abb4d6
JB		 626 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
627 struct ahc_linux_target *targ = scsi_transport_target_data(starget);
628 unsigned short scsirate;
629 struct ahc_devinfo devinfo;
630 struct ahc_initiator_tinfo *tinfo;
631 struct ahc_tmode_tstate *tstate;
632 char channel = starget->channel + 'A';
633 unsigned int our_id = ahc->our_id;
634 unsigned int target_offset;
c7525233
JB		 635
636 target_offset = starget->id;
637 if (starget->channel != 0)
638 target_offset += 8;
b1abb4d6
JB		 639
640 if (starget->channel)
641 our_id = ahc->our_id_b;
1da177e4 642
fb3089df 643 ahc_lock(ahc, &flags);
fb3089df 644
b1abb4d6 645 BUG_ON(*ahc_targp != NULL);
c7525233 646
b1abb4d6
JB		 647 *ahc_targp = starget;
648 memset(targ, 0, sizeof(*targ));
c7525233 649
b1abb4d6
JB		 650 if (sc) {
651 if ((ahc->features & AHC_ULTRA2) != 0) {
652 scsirate = sc->device_flags[target_offset] & CFXFER;
653 } else {
654 scsirate = (sc->device_flags[target_offset] & CFXFER) << 4;
655 if (sc->device_flags[target_offset] & CFSYNCH)
656 scsirate |= SOFS;
c7525233 657 }
b1abb4d6
JB		 658 if (sc->device_flags[target_offset] & CFWIDEB) {
659 scsirate |= WIDEXFER;
660 spi_max_width(starget) = 1;
661 } else
662 spi_max_width(starget) = 0;
663 spi_min_period(starget) =
664 ahc_find_period(ahc, scsirate, AHC_SYNCRATE_DT);
665 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
666 starget->id, &tstate);
c7525233 667 }
b1abb4d6
JB		 668 ahc_compile_devinfo(&devinfo, our_id, starget->id,
669 CAM_LUN_WILDCARD, channel,
670 ROLE_INITIATOR);
671 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
672 AHC_TRANS_GOAL, /*paused*/FALSE);
673 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
674 AHC_TRANS_GOAL, /*paused*/FALSE);
fb3089df 675 ahc_unlock(ahc, &flags);
b1abb4d6
JB		 676
677 return 0;
678}
679
680static void
681ahc_linux_target_destroy(struct scsi_target *starget)
682{
683 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
684
685 *ahc_targp = NULL;
686}
687
688static int
689ahc_linux_slave_alloc(struct scsi_device *sdev)
690{
691 struct ahc_softc *ahc =
692 *((struct ahc_softc **)sdev->host->hostdata);
693 struct scsi_target *starget = sdev->sdev_target;
694 struct ahc_linux_target *targ = scsi_transport_target_data(starget);
695 struct ahc_linux_device *dev;
696
697 if (bootverbose)
698 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
699
700 BUG_ON(targ->sdev[sdev->lun] != NULL);
701
702 dev = scsi_transport_device_data(sdev);
703 memset(dev, 0, sizeof(*dev));
704
705 /*
706 * We start out life using untagged
707 * transactions of which we allow one.
708 */
709 dev->openings = 1;
710
711 /*
712 * Set maxtags to 0. This will be changed if we
713 * later determine that we are dealing with
714 * a tagged queuing capable device.
715 */
716 dev->maxtags = 0;
717
718 targ->sdev[sdev->lun] = sdev;
719
720 return 0;
1da177e4
LT		 721}
722
723static int
b1abb4d6 724ahc_linux_slave_configure(struct scsi_device *sdev)
1da177e4
LT		 725{
726 struct ahc_softc *ahc;
1da177e4 727
b1abb4d6 728 ahc = *((struct ahc_softc **)sdev->host->hostdata);
c7525233 729
1da177e4 730 if (bootverbose)
b1abb4d6 731 printf("%s: Slave Configure %d\n", ahc_name(ahc), sdev->id);
c7525233 732
b1abb4d6 733 ahc_linux_device_queue_depth(sdev);
cb624029
JB		 734
735 /* Initial Domain Validation */
b1abb4d6
JB		 736 if (!spi_initial_dv(sdev->sdev_target))
737 spi_dv_device(sdev);
cb624029 738
c7525233 739 return 0;
1da177e4
LT		 740}
741
742static void
b1abb4d6 743ahc_linux_slave_destroy(struct scsi_device *sdev)
1da177e4
LT		 744{
745 struct ahc_softc *ahc;
b1abb4d6
JB		 746 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
747 struct ahc_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
1da177e4 748
b1abb4d6 749 ahc = *((struct ahc_softc **)sdev->host->hostdata);
1da177e4 750 if (bootverbose)
b1abb4d6 751 printf("%s: Slave Destroy %d\n", ahc_name(ahc), sdev->id);
c7525233
JB		 752
753 BUG_ON(dev->active);
754
b1abb4d6 755 targ->sdev[sdev->lun] = NULL;
1da177e4 756}
1da177e4
LT		 757
758#if defined(__i386__)
759/*
760 * Return the disk geometry for the given SCSI device.
761 */
762static int
1da177e4
LT		 763ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
764 sector_t capacity, int geom[])
765{
766 uint8_t *bh;
1da177e4
LT		 767 int heads;
768 int sectors;
769 int cylinders;
770 int ret;
771 int extended;
772 struct ahc_softc *ahc;
773 u_int channel;
774
775 ahc = *((struct ahc_softc **)sdev->host->hostdata);
776 channel = sdev->channel;
777
1da177e4 778 bh = scsi_bios_ptable(bdev);
1da177e4
LT		 779 if (bh) {
780 ret = scsi_partsize(bh, capacity,
781 &geom[2], &geom[0], &geom[1]);
1da177e4 782 kfree(bh);
1da177e4
LT		 783 if (ret != -1)
784 return (ret);
785 }
786 heads = 64;
787 sectors = 32;
788 cylinders = aic_sector_div(capacity, heads, sectors);
789
790 if (aic7xxx_extended != 0)
791 extended = 1;
792 else if (channel == 0)
793 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
794 else
795 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
796 if (extended && cylinders >= 1024) {
797 heads = 255;
798 sectors = 63;
799 cylinders = aic_sector_div(capacity, heads, sectors);
800 }
801 geom[0] = heads;
802 geom[1] = sectors;
803 geom[2] = cylinders;
804 return (0);
805}
806#endif
807
808/*
809 * Abort the current SCSI command(s).
810 */
811static int
013791ee 812ahc_linux_abort(struct scsi_cmnd *cmd)
1da177e4
LT		 813{
814 int error;
815
816 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
817 if (error != 0)
818 printf("aic7xxx_abort returns 0x%x\n", error);
819 return (error);
820}
821
822/*
823 * Attempt to send a target reset message to the device that timed out.
824 */
825static int
013791ee 826ahc_linux_dev_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 827{
828 int error;
829
830 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
831 if (error != 0)
832 printf("aic7xxx_dev_reset returns 0x%x\n", error);
833 return (error);
834}
835
836/*
837 * Reset the SCSI bus.
838 */
839static int
013791ee 840ahc_linux_bus_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 841{
842 struct ahc_softc *ahc;
1da177e4
LT		 843 int found;
844
845 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
1da177e4
LT		 846 found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
847 /*initiate reset*/TRUE);
1da177e4
LT		 848
849 if (bootverbose)
850 printf("%s: SCSI bus reset delivered. "
851 "%d SCBs aborted.\n", ahc_name(ahc), found);
852
853 return SUCCESS;
854}
855
013791ee 856struct scsi_host_template aic7xxx_driver_template = {
1da177e4
LT		 857 .module = THIS_MODULE,
858 .name = "aic7xxx",
859 .proc_info = ahc_linux_proc_info,
860 .info = ahc_linux_info,
861 .queuecommand = ahc_linux_queue,
862 .eh_abort_handler = ahc_linux_abort,
863 .eh_device_reset_handler = ahc_linux_dev_reset,
864 .eh_bus_reset_handler = ahc_linux_bus_reset,
865#if defined(__i386__)
866 .bios_param = ahc_linux_biosparam,
867#endif
868 .can_queue = AHC_MAX_QUEUE,
869 .this_id = -1,
870 .cmd_per_lun = 2,
871 .use_clustering = ENABLE_CLUSTERING,
872 .slave_alloc = ahc_linux_slave_alloc,
873 .slave_configure = ahc_linux_slave_configure,
874 .slave_destroy = ahc_linux_slave_destroy,
b1abb4d6
JB		 875 .target_alloc = ahc_linux_target_alloc,
876 .target_destroy = ahc_linux_target_destroy,
1da177e4
LT		 877};
878
879/**************************** Tasklet Handler *********************************/
880
1da177e4
LT		 881/******************************** Macros **************************************/
882#define BUILD_SCSIID(ahc, cmd) \
883 ((((cmd)->device->id << TID_SHIFT) & TID) \
884 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
885 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
886
887/******************************** Bus DMA *************************************/
888int
889ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
890 bus_size_t alignment, bus_size_t boundary,
891 dma_addr_t lowaddr, dma_addr_t highaddr,
892 bus_dma_filter_t *filter, void *filterarg,
893 bus_size_t maxsize, int nsegments,
894 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
895{
896 bus_dma_tag_t dmat;
897
898 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
899 if (dmat == NULL)
900 return (ENOMEM);
901
902 /*
903 * Linux is very simplistic about DMA memory. For now don't
904 * maintain all specification information. Once Linux supplies
905 * better facilities for doing these operations, or the
906 * needs of this particular driver change, we might need to do
907 * more here.
908 */
909 dmat->alignment = alignment;
910 dmat->boundary = boundary;
911 dmat->maxsize = maxsize;
912 *ret_tag = dmat;
913 return (0);
914}
915
916void
917ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
918{
919 free(dmat, M_DEVBUF);
920}
921
922int
923ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
924 int flags, bus_dmamap_t *mapp)
925{
1da177e4 926 *vaddr = pci_alloc_consistent(ahc->dev_softc,
7dfa0f26 927 dmat->maxsize, mapp);
1da177e4 928 if (*vaddr == NULL)
7dfa0f26
CH		 929 return ENOMEM;
930 return 0;
1da177e4
LT		 931}
932
933void
934ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
935 void* vaddr, bus_dmamap_t map)
936{
937 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
7dfa0f26 938 vaddr, map);
1da177e4
LT		 939}
940
941int
942ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
943 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
944 void *cb_arg, int flags)
945{
946 /*
947 * Assume for now that this will only be used during
948 * initialization and not for per-transaction buffer mapping.
949 */
950 bus_dma_segment_t stack_sg;
951
7dfa0f26 952 stack_sg.ds_addr = map;
1da177e4
LT		 953 stack_sg.ds_len = dmat->maxsize;
954 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
955 return (0);
956}
957
958void
959ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
960{
1da177e4
LT		 961}
962
963int
964ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
965{
966 /* Nothing to do */
967 return (0);
968}
969
970/********************* Platform Dependent Functions ***************************/
971/*
972 * Compare "left hand" softc with "right hand" softc, returning:
973 * < 0 - lahc has a lower priority than rahc
974 * 0 - Softcs are equal
975 * > 0 - lahc has a higher priority than rahc
976 */
977int
978ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
979{
980 int value;
981 int rvalue;
982 int lvalue;
983
984 /*
985 * Under Linux, cards are ordered as follows:
986 * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
987 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
988 * 3) All remaining VLB/EISA devices sorted by ioport.
989 * 4) All remaining PCI devices sorted by bus/slot/func.
990 */
991 value = (lahc->flags & AHC_BIOS_ENABLED)
992 - (rahc->flags & AHC_BIOS_ENABLED);
993 if (value != 0)
994 /* Controllers with BIOS enabled have a *higher* priority */
995 return (value);
996
997 /*
998 * Same BIOS setting, now sort based on bus type.
999 * EISA and VL controllers sort together. EISA/VL
1000 * have higher priority than PCI.
1001 */
1002 rvalue = (rahc->chip & AHC_BUS_MASK);
1003 if (rvalue == AHC_VL)
1004 rvalue = AHC_EISA;
1005 lvalue = (lahc->chip & AHC_BUS_MASK);
1006 if (lvalue == AHC_VL)
1007 lvalue = AHC_EISA;
1008 value = rvalue - lvalue;
1009 if (value != 0)
1010 return (value);
1011
1012 /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
1013 switch (rvalue) {
1014#ifdef CONFIG_PCI
1015 case AHC_PCI:
1016 {
1017 char primary_channel;
1018
1019 if (aic7xxx_reverse_scan != 0)
1020 value = ahc_get_pci_bus(lahc->dev_softc)
1021 - ahc_get_pci_bus(rahc->dev_softc);
1022 else
1023 value = ahc_get_pci_bus(rahc->dev_softc)
1024 - ahc_get_pci_bus(lahc->dev_softc);
1025 if (value != 0)
1026 break;
1027 if (aic7xxx_reverse_scan != 0)
1028 value = ahc_get_pci_slot(lahc->dev_softc)
1029 - ahc_get_pci_slot(rahc->dev_softc);
1030 else
1031 value = ahc_get_pci_slot(rahc->dev_softc)
1032 - ahc_get_pci_slot(lahc->dev_softc);
1033 if (value != 0)
1034 break;
1035 /*
1036 * On multi-function devices, the user can choose
1037 * to have function 1 probed before function 0.
1038 * Give whichever channel is the primary channel
1039 * the highest priority.
1040 */
1041 primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
1042 value = -1;
1043 if (lahc->channel == primary_channel)
1044 value = 1;
1045 break;
1046 }
1047#endif
1048 case AHC_EISA:
1049 if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
1050 value = rahc->platform_data->bios_address
1051 - lahc->platform_data->bios_address;
1052 } else {
1053 value = rahc->bsh.ioport
1054 - lahc->bsh.ioport;
1055 }
1056 break;
1057 default:
1058 panic("ahc_softc_sort: invalid bus type");
1059 }
1060 return (value);
1061}
1062
1063static void
1064ahc_linux_setup_tag_info_global(char *p)
1065{
1066 int tags, i, j;
1067
1068 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1069 printf("Setting Global Tags= %d\n", tags);
1070
1071 for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
1072 for (j = 0; j < AHC_NUM_TARGETS; j++) {
1073 aic7xxx_tag_info[i].tag_commands[j] = tags;
1074 }
1075 }
1076}
1077
1078static void
1079ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1080{
1081
1082 if ((instance >= 0) && (targ >= 0)
1083 && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
1084 && (targ < AHC_NUM_TARGETS)) {
1085 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
1086 if (bootverbose)
1087 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1088 }
1089}
1090
1da177e4
LT		 1091/*
1092 * Handle Linux boot parameters. This routine allows for assigning a value
1093 * to a parameter with a ':' between the parameter and the value.
1094 * ie. aic7xxx=stpwlev:1,extended
1095 */
1096static int
1097aic7xxx_setup(char *s)
1098{
1099 int i, n;
1100 char *p;
1101 char *end;
1102
1103 static struct {
1104 const char *name;
1105 uint32_t *flag;
1106 } options[] = {
1107 { "extended", &aic7xxx_extended },
1108 { "no_reset", &aic7xxx_no_reset },
1109 { "verbose", &aic7xxx_verbose },
1110 { "allow_memio", &aic7xxx_allow_memio},
1111#ifdef AHC_DEBUG
1112 { "debug", &ahc_debug },
1113#endif
1114 { "reverse_scan", &aic7xxx_reverse_scan },
1115 { "no_probe", &aic7xxx_probe_eisa_vl },
1116 { "probe_eisa_vl", &aic7xxx_probe_eisa_vl },
1117 { "periodic_otag", &aic7xxx_periodic_otag },
1118 { "pci_parity", &aic7xxx_pci_parity },
1119 { "seltime", &aic7xxx_seltime },
1120 { "tag_info", NULL },
1121 { "global_tag_depth", NULL },
1122 { "dv", NULL }
1123 };
1124
1125 end = strchr(s, '\0');
1126
1127 /*
1128 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1129 * will never be 0 in this case.
1130 */
1131 n = 0;
1132
1133 while ((p = strsep(&s, ",.")) != NULL) {
1134 if (*p == '\0')
1135 continue;
1136 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1137
1138 n = strlen(options[i].name);
1139 if (strncmp(options[i].name, p, n) == 0)
1140 break;
1141 }
1142 if (i == NUM_ELEMENTS(options))
1143 continue;
1144
1145 if (strncmp(p, "global_tag_depth", n) == 0) {
1146 ahc_linux_setup_tag_info_global(p + n);
1147 } else if (strncmp(p, "tag_info", n) == 0) {
1148 s = aic_parse_brace_option("tag_info", p + n, end,
1149 2, ahc_linux_setup_tag_info, 0);
1da177e4
LT		 1150 } else if (p[n] == ':') {
1151 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1152 } else if (strncmp(p, "verbose", n) == 0) {
1153 *(options[i].flag) = 1;
1154 } else {
1155 *(options[i].flag) ^= 0xFFFFFFFF;
1156 }
1157 }
1158 return 1;
1159}
1160
1161__setup("aic7xxx=", aic7xxx_setup);
1162
1163uint32_t aic7xxx_verbose;
1164
1165int
013791ee 1166ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1da177e4
LT		 1167{
1168 char buf[80];
1169 struct Scsi_Host *host;
1170 char *new_name;
1171 u_long s;
1da177e4
LT		 1172
1173 template->name = ahc->description;
1174 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1175 if (host == NULL)
1176 return (ENOMEM);
1177
1178 *((struct ahc_softc **)host->hostdata) = ahc;
1179 ahc_lock(ahc, &s);
1da177e4 1180 scsi_assign_lock(host, &ahc->platform_data->spin_lock);
1da177e4
LT		 1181 ahc->platform_data->host = host;
1182 host->can_queue = AHC_MAX_QUEUE;
1183 host->cmd_per_lun = 2;
1184 /* XXX No way to communicate the ID for multiple channels */
1185 host->this_id = ahc->our_id;
1186 host->irq = ahc->platform_data->irq;
1187 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1188 host->max_lun = AHC_NUM_LUNS;
1189 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1190 host->sg_tablesize = AHC_NSEG;
1191 ahc_set_unit(ahc, ahc_linux_next_unit());
1192 sprintf(buf, "scsi%d", host->host_no);
1193 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1194 if (new_name != NULL) {
1195 strcpy(new_name, buf);
1196 ahc_set_name(ahc, new_name);
1197 }
1198 host->unique_id = ahc->unit;
1da177e4 1199 ahc_linux_initialize_scsi_bus(ahc);
1da177e4 1200 ahc_intr_enable(ahc, TRUE);
1da177e4
LT		 1201 ahc_unlock(ahc, &s);
1202
92d161c3
JB		 1203 host->transportt = ahc_linux_transport_template;
1204
1da177e4
LT		 1205 scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
1206 scsi_scan_host(host);
1da177e4
LT		 1207 return (0);
1208}
1209
1210uint64_t
1211ahc_linux_get_memsize(void)
1212{
1213 struct sysinfo si;
1214
1215 si_meminfo(&si);
1216 return ((uint64_t)si.totalram << PAGE_SHIFT);
1217}
1218
1219/*
1220 * Find the smallest available unit number to use
1221 * for a new device. We don't just use a static
1222 * count to handle the "repeated hot-(un)plug"
1223 * scenario.
1224 */
1225static int
1226ahc_linux_next_unit(void)
1227{
1228 struct ahc_softc *ahc;
1229 int unit;
1230
1231 unit = 0;
1232retry:
1233 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
1234 if (ahc->unit == unit) {
1235 unit++;
1236 goto retry;
1237 }
1238 }
1239 return (unit);
1240}
1241
1242/*
1243 * Place the SCSI bus into a known state by either resetting it,
1244 * or forcing transfer negotiations on the next command to any
1245 * target.
1246 */
1247void
1248ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1249{
1250 int i;
1251 int numtarg;
1252
1253 i = 0;
1254 numtarg = 0;
1255
1256 if (aic7xxx_no_reset != 0)
1257 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1258
1259 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1260 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1261 else
1262 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1263
1264 if ((ahc->features & AHC_TWIN) != 0) {
1265
1266 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1267 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1268 } else {
1269 if (numtarg == 0)
1270 i = 8;
1271 numtarg += 8;
1272 }
1273 }
1274
1275 /*
1276 * Force negotiation to async for all targets that
1277 * will not see an initial bus reset.
1278 */
1279 for (; i < numtarg; i++) {
1280 struct ahc_devinfo devinfo;
1281 struct ahc_initiator_tinfo *tinfo;
1282 struct ahc_tmode_tstate *tstate;
1283 u_int our_id;
1284 u_int target_id;
1285 char channel;
1286
1287 channel = 'A';
1288 our_id = ahc->our_id;
1289 target_id = i;
1290 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1291 channel = 'B';
1292 our_id = ahc->our_id_b;
1293 target_id = i % 8;
1294 }
1295 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1296 target_id, &tstate);
1297 ahc_compile_devinfo(&devinfo, our_id, target_id,
1298 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1299 ahc_update_neg_request(ahc, &devinfo, tstate,
1300 tinfo, AHC_NEG_ALWAYS);
1301 }
1302 /* Give the bus some time to recover */
1303 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1304 ahc_linux_freeze_simq(ahc);
1305 init_timer(&ahc->platform_data->reset_timer);
1306 ahc->platform_data->reset_timer.data = (u_long)ahc;
1307 ahc->platform_data->reset_timer.expires =
1308 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
1309 ahc->platform_data->reset_timer.function =
1310 ahc_linux_release_simq;
1311 add_timer(&ahc->platform_data->reset_timer);
1312 }
1313}
1314
1315int
1316ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1317{
1318
1319 ahc->platform_data =
1320 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1321 if (ahc->platform_data == NULL)
1322 return (ENOMEM);
1323 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1da177e4 1324 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1da177e4 1325 ahc_lockinit(ahc);
1da177e4 1326 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
1da177e4
LT		 1327 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1328 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1329 if (aic7xxx_pci_parity == 0)
1330 ahc->flags |= AHC_DISABLE_PCI_PERR;
1331
1332 return (0);
1333}
1334
1335void
1336ahc_platform_free(struct ahc_softc *ahc)
1337{
b1abb4d6 1338 struct scsi_target *starget;
1da177e4
LT		 1339 int i, j;
1340
1341 if (ahc->platform_data != NULL) {
1da177e4 1342 if (ahc->platform_data->host != NULL) {
1da177e4 1343 scsi_remove_host(ahc->platform_data->host);
1da177e4
LT		 1344 scsi_host_put(ahc->platform_data->host);
1345 }
1346
1347 /* destroy all of the device and target objects */
1348 for (i = 0; i < AHC_NUM_TARGETS; i++) {
b1abb4d6
JB		 1349 starget = ahc->platform_data->starget[i];
1350 if (starget != NULL) {
1da177e4 1351 for (j = 0; j < AHC_NUM_LUNS; j++) {
b1abb4d6
JB		 1352 struct ahc_linux_target *targ =
1353 scsi_transport_target_data(starget);
1da177e4 1354
b1abb4d6 1355 if (targ->sdev[j] == NULL)
1da177e4 1356 continue;
b1abb4d6 1357 targ->sdev[j] = NULL;
1da177e4 1358 }
b1abb4d6 1359 ahc->platform_data->starget[i] = NULL;
1da177e4
LT		 1360 }
1361 }
1362
1363 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1364 free_irq(ahc->platform_data->irq, ahc);
1365 if (ahc->tag == BUS_SPACE_PIO
1366 && ahc->bsh.ioport != 0)
1367 release_region(ahc->bsh.ioport, 256);
1368 if (ahc->tag == BUS_SPACE_MEMIO
1369 && ahc->bsh.maddr != NULL) {
1370 iounmap(ahc->bsh.maddr);
1371 release_mem_region(ahc->platform_data->mem_busaddr,
1372 0x1000);
1373 }
dedd8310 1374
1da177e4
LT		 1375 free(ahc->platform_data, M_DEVBUF);
1376 }
1377}
1378
1379void
1380ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1381{
1382 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1383 SCB_GET_CHANNEL(ahc, scb),
1384 SCB_GET_LUN(scb), SCB_LIST_NULL,
1385 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1386}
1387
1388void
1389ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1390 ahc_queue_alg alg)
1391{
b1abb4d6
JB		 1392 struct scsi_target *starget;
1393 struct ahc_linux_target *targ;
1da177e4 1394 struct ahc_linux_device *dev;
b1abb4d6
JB		 1395 struct scsi_device *sdev;
1396 u_int target_offset;
1da177e4
LT		 1397 int was_queuing;
1398 int now_queuing;
1399
b1abb4d6
JB		 1400 target_offset = devinfo->target;
1401 if (devinfo->channel != 'A')
1402 target_offset += 8;
1403 starget = ahc->platform_data->starget[target_offset];
1404 targ = scsi_transport_target_data(starget);
1405 BUG_ON(targ == NULL);
1406 sdev = targ->sdev[devinfo->lun];
1407 if (sdev == NULL)
1da177e4 1408 return;
b1abb4d6
JB		 1409 dev = scsi_transport_device_data(sdev);
1410
1da177e4
LT		 1411 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1412 switch (alg) {
1413 default:
1414 case AHC_QUEUE_NONE:
1415 now_queuing = 0;
1416 break;
1417 case AHC_QUEUE_BASIC:
1418 now_queuing = AHC_DEV_Q_BASIC;
1419 break;
1420 case AHC_QUEUE_TAGGED:
1421 now_queuing = AHC_DEV_Q_TAGGED;
1422 break;
1423 }
1424 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1425 && (was_queuing != now_queuing)
1426 && (dev->active != 0)) {
1427 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1428 dev->qfrozen++;
1429 }
1430
1431 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1432 if (now_queuing) {
1433 u_int usertags;
1434
1435 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1436 if (!was_queuing) {
1437 /*
1438 * Start out agressively and allow our
1439 * dynamic queue depth algorithm to take
1440 * care of the rest.
1441 */
1442 dev->maxtags = usertags;
1443 dev->openings = dev->maxtags - dev->active;
1444 }
1445 if (dev->maxtags == 0) {
1446 /*
1447 * Queueing is disabled by the user.
1448 */
1449 dev->openings = 1;
1450 } else if (alg == AHC_QUEUE_TAGGED) {
1451 dev->flags |= AHC_DEV_Q_TAGGED;
1452 if (aic7xxx_periodic_otag != 0)
1453 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1454 } else
1455 dev->flags |= AHC_DEV_Q_BASIC;
1456 } else {
1457 /* We can only have one opening. */
1458 dev->maxtags = 0;
1459 dev->openings = 1 - dev->active;
1460 }
b1abb4d6
JB		 1461 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1462 case AHC_DEV_Q_BASIC:
1463 scsi_adjust_queue_depth(sdev,
1464 MSG_SIMPLE_TASK,
1465 dev->openings + dev->active);
1466 break;
1467 case AHC_DEV_Q_TAGGED:
1468 scsi_adjust_queue_depth(sdev,
1469 MSG_ORDERED_TASK,
1470 dev->openings + dev->active);
1471 break;
1472 default:
1473 /*
1474 * We allow the OS to queue 2 untagged transactions to
1475 * us at any time even though we can only execute them
1476 * serially on the controller/device. This should
1477 * remove some latency.
1478 */
1479 scsi_adjust_queue_depth(sdev,
1480 /*NON-TAGGED*/0,
1481 /*queue depth*/2);
1482 break;
1da177e4 1483 }
1da177e4
LT		 1484}
1485
1486int
1487ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1488 int lun, u_int tag, role_t role, uint32_t status)
1489{
e4e360c3 1490 return 0;
1da177e4
LT		 1491}
1492
cb624029
JB		 1493static u_int
1494ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1da177e4 1495{
cb624029
JB		 1496 static int warned_user;
1497 u_int tags;
1da177e4 1498
cb624029
JB		 1499 tags = 0;
1500 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1501 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
1502 if (warned_user == 0) {
1da177e4 1503
cb624029
JB		 1504 printf(KERN_WARNING
1505"aic7xxx: WARNING: Insufficient tag_info instances\n"
1506"aic7xxx: for installed controllers. Using defaults\n"
1507"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1508"aic7xxx: the aic7xxx_osm..c source file.\n");
1509 warned_user++;
1510 }
1511 tags = AHC_MAX_QUEUE;
1512 } else {
1513 adapter_tag_info_t *tag_info;
1da177e4 1514
cb624029
JB		 1515 tag_info = &aic7xxx_tag_info[ahc->unit];
1516 tags = tag_info->tag_commands[devinfo->target_offset];
1517 if (tags > AHC_MAX_QUEUE)
1518 tags = AHC_MAX_QUEUE;
1519 }
1da177e4 1520 }
cb624029 1521 return (tags);
1da177e4
LT		 1522}
1523
cb624029
JB		 1524/*
1525 * Determines the queue depth for a given device.
1526 */
1da177e4 1527static void
b1abb4d6 1528ahc_linux_device_queue_depth(struct scsi_device *sdev)
1da177e4 1529{
cb624029
JB		 1530 struct ahc_devinfo devinfo;
1531 u_int tags;
b1abb4d6 1532 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1da177e4 1533
cb624029 1534 ahc_compile_devinfo(&devinfo,
b1abb4d6 1535 sdev->sdev_target->channel == 0
cb624029 1536 ? ahc->our_id : ahc->our_id_b,
b1abb4d6
JB		 1537 sdev->sdev_target->id, sdev->lun,
1538 sdev->sdev_target->channel == 0 ? 'A' : 'B',
cb624029
JB		 1539 ROLE_INITIATOR);
1540 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
b1abb4d6 1541 if (tags != 0 && sdev->tagged_supported != 0) {
1da177e4 1542
cb624029
JB		 1543 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
1544 ahc_print_devinfo(ahc, &devinfo);
1545 printf("Tagged Queuing enabled. Depth %d\n", tags);
1da177e4 1546 } else {
cb624029 1547 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
1da177e4
LT		 1548 }
1549}
1550
e4e360c3
JB		 1551static int
1552ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1553 struct scsi_cmnd *cmd)
1da177e4 1554{
cb624029
JB		 1555 struct scb *scb;
1556 struct hardware_scb *hscb;
1557 struct ahc_initiator_tinfo *tinfo;
1558 struct ahc_tmode_tstate *tstate;
1559 uint16_t mask;
e4e360c3 1560 struct scb_tailq *untagged_q = NULL;
1da177e4 1561
e4e360c3
JB		 1562 /*
1563 * Schedule us to run later. The only reason we are not
1564 * running is because the whole controller Q is frozen.
1565 */
1566 if (ahc->platform_data->qfrozen != 0)
1567 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1568
e4e360c3
JB		 1569 /*
1570 * We only allow one untagged transaction
1571 * per target in the initiator role unless
1572 * we are storing a full busy target *lun*
1573 * table in SCB space.
1574 */
1575 if (!blk_rq_tagged(cmd->request)
1576 && (ahc->features & AHC_SCB_BTT) == 0) {
1577 int target_offset;
1da177e4 1578
e4e360c3
JB		 1579 target_offset = cmd->device->id + cmd->device->channel * 8;
1580 untagged_q = &(ahc->untagged_queues[target_offset]);
1581 if (!TAILQ_EMPTY(untagged_q))
1582 /* if we're already executing an untagged command
1583 * we're busy to another */
1584 return SCSI_MLQUEUE_DEVICE_BUSY;
1585 }
1586
1587 /*
1588 * Get an scb to use.
1589 */
1590 if ((scb = ahc_get_scb(ahc)) == NULL) {
cb624029 1591 ahc->flags |= AHC_RESOURCE_SHORTAGE;
e4e360c3
JB		 1592 return SCSI_MLQUEUE_HOST_BUSY;
1593 }
1da177e4 1594
e4e360c3
JB		 1595 scb->io_ctx = cmd;
1596 scb->platform_data->dev = dev;
1597 hscb = scb->hscb;
1598 cmd->host_scribble = (char *)scb;
1da177e4 1599
e4e360c3
JB		 1600 /*
1601 * Fill out basics of the HSCB.
1602 */
1603 hscb->control = 0;
1604 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1605 hscb->lun = cmd->device->lun;
1606 mask = SCB_GET_TARGET_MASK(ahc, scb);
1607 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1608 SCB_GET_OUR_ID(scb),
1609 SCB_GET_TARGET(ahc, scb), &tstate);
1610 hscb->scsirate = tinfo->scsirate;
1611 hscb->scsioffset = tinfo->curr.offset;
1612 if ((tstate->ultraenb & mask) != 0)
1613 hscb->control |= ULTRAENB;
1614
1615 if ((ahc->user_discenable & mask) != 0)
1616 hscb->control |= DISCENB;
1617
1618 if ((tstate->auto_negotiate & mask) != 0) {
1619 scb->flags |= SCB_AUTO_NEGOTIATE;
1620 scb->hscb->control |= MK_MESSAGE;
1621 }
1622
1623 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
e4e360c3
JB		 1624 int msg_bytes;
1625 uint8_t tag_msgs[2];
1626
1627 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1628 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1629 hscb->control |= tag_msgs[0];
1630 if (tag_msgs[0] == MSG_ORDERED_TASK)
cb624029 1631 dev->commands_since_idle_or_otag = 0;
dedd8310
CH		 1632 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1633 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
e4e360c3
JB		 1634 hscb->control |= MSG_ORDERED_TASK;
1635 dev->commands_since_idle_or_otag = 0;
cb624029 1636 } else {
e4e360c3 1637 hscb->control |= MSG_SIMPLE_TASK;
cb624029 1638 }
e4e360c3 1639 }
1da177e4 1640
e4e360c3
JB		 1641 hscb->cdb_len = cmd->cmd_len;
1642 if (hscb->cdb_len <= 12) {
1643 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1644 } else {
1645 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1646 scb->flags |= SCB_CDB32_PTR;
1647 }
1da177e4 1648
e4e360c3
JB		 1649 scb->platform_data->xfer_len = 0;
1650 ahc_set_residual(scb, 0);
1651 ahc_set_sense_residual(scb, 0);
1652 scb->sg_count = 0;
1653 if (cmd->use_sg != 0) {
1654 struct ahc_dma_seg *sg;
1655 struct scatterlist *cur_seg;
1656 struct scatterlist *end_seg;
1657 int nseg;
1658
1659 cur_seg = (struct scatterlist *)cmd->request_buffer;
1660 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
1661 cmd->sc_data_direction);
1662 end_seg = cur_seg + nseg;
1663 /* Copy the segments into the SG list. */
1664 sg = scb->sg_list;
1665 /*
1666 * The sg_count may be larger than nseg if
1667 * a transfer crosses a 32bit page.
1668 */
1669 while (cur_seg < end_seg) {
1da177e4 1670 dma_addr_t addr;
e4e360c3
JB		 1671 bus_size_t len;
1672 int consumed;
1673
1674 addr = sg_dma_address(cur_seg);
1675 len = sg_dma_len(cur_seg);
1676 consumed = ahc_linux_map_seg(ahc, scb,
1677 sg, addr, len);
1678 sg += consumed;
1679 scb->sg_count += consumed;
1680 cur_seg++;
1da177e4 1681 }
e4e360c3
JB		 1682 sg--;
1683 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4 1684
e4e360c3
JB		 1685 /*
1686 * Reset the sg list pointer.
1687 */
1688 scb->hscb->sgptr =
1689 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1690
1691 /*
1692 * Copy the first SG into the "current"
1693 * data pointer area.
1694 */
1695 scb->hscb->dataptr = scb->sg_list->addr;
1696 scb->hscb->datacnt = scb->sg_list->len;
1697 } else if (cmd->request_bufflen != 0) {
1698 struct ahc_dma_seg *sg;
1699 dma_addr_t addr;
1700
1701 sg = scb->sg_list;
1702 addr = pci_map_single(ahc->dev_softc,
1703 cmd->request_buffer,
1704 cmd->request_bufflen,
1705 cmd->sc_data_direction);
1706 scb->platform_data->buf_busaddr = addr;
1707 scb->sg_count = ahc_linux_map_seg(ahc, scb,
1708 sg, addr,
1709 cmd->request_bufflen);
1710 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4
LT		 1711
1712 /*
e4e360c3 1713 * Reset the sg list pointer.
1da177e4 1714 */
e4e360c3
JB		 1715 scb->hscb->sgptr =
1716 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1717
1718 /*
1719 * Copy the first SG into the "current"
1720 * data pointer area.
1721 */
1722 scb->hscb->dataptr = sg->addr;
1723 scb->hscb->datacnt = sg->len;
1724 } else {
1725 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1726 scb->hscb->dataptr = 0;
1727 scb->hscb->datacnt = 0;
1728 scb->sg_count = 0;
1729 }
1730
1731 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1732 dev->openings--;
1733 dev->active++;
1734 dev->commands_issued++;
1735 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1736 dev->commands_since_idle_or_otag++;
1737
1738 scb->flags |= SCB_ACTIVE;
1739 if (untagged_q) {
1740 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1741 scb->flags |= SCB_UNTAGGEDQ;
1da177e4 1742 }
e4e360c3
JB		 1743 ahc_queue_scb(ahc, scb);
1744 return 0;
1da177e4
LT		 1745}
1746
1747/*
1748 * SCSI controller interrupt handler.
1749 */
1750irqreturn_t
1751ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1752{
1753 struct ahc_softc *ahc;
1754 u_long flags;
1755 int ours;
1756
1757 ahc = (struct ahc_softc *) dev_id;
1758 ahc_lock(ahc, &flags);
1759 ours = ahc_intr(ahc);
1da177e4
LT		 1760 ahc_unlock(ahc, &flags);
1761 return IRQ_RETVAL(ours);
1762}
1763
1764void
1765ahc_platform_flushwork(struct ahc_softc *ahc)
1766{
1767
1da177e4
LT		 1768}
1769
1da177e4
LT		 1770void
1771ahc_send_async(struct ahc_softc *ahc, char channel,
1772 u_int target, u_int lun, ac_code code, void *arg)
1773{
1774 switch (code) {
1775 case AC_TRANSFER_NEG:
1776 {
1777 char buf[80];
b1abb4d6 1778 struct scsi_target *starget;
1da177e4
LT		 1779 struct ahc_linux_target *targ;
1780 struct info_str info;
1781 struct ahc_initiator_tinfo *tinfo;
1782 struct ahc_tmode_tstate *tstate;
1783 int target_offset;
b1abb4d6
JB		 1784 unsigned int target_ppr_options;
1785
1786 BUG_ON(target == CAM_TARGET_WILDCARD);
1da177e4
LT		 1787
1788 info.buffer = buf;
1789 info.length = sizeof(buf);
1790 info.offset = 0;
1791 info.pos = 0;
1792 tinfo = ahc_fetch_transinfo(ahc, channel,
1793 channel == 'A' ? ahc->our_id
1794 : ahc->our_id_b,
1795 target, &tstate);
1796
1797 /*
1798 * Don't bother reporting results while
1799 * negotiations are still pending.
1800 */
1801 if (tinfo->curr.period != tinfo->goal.period
1802 || tinfo->curr.width != tinfo->goal.width
1803 || tinfo->curr.offset != tinfo->goal.offset
1804 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1805 if (bootverbose == 0)
1806 break;
1807
1808 /*
1809 * Don't bother reporting results that
1810 * are identical to those last reported.
1811 */
1812 target_offset = target;
1813 if (channel == 'B')
1814 target_offset += 8;
b1abb4d6
JB		 1815 starget = ahc->platform_data->starget[target_offset];
1816 targ = scsi_transport_target_data(starget);
1da177e4
LT		 1817 if (targ == NULL)
1818 break;
b1abb4d6
JB		 1819
1820 target_ppr_options =
1821 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1822 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1823 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1824
1825 if (tinfo->curr.period == spi_period(starget)
1826 && tinfo->curr.width == spi_width(starget)
1827 && tinfo->curr.offset == spi_offset(starget)
1828 && tinfo->curr.ppr_options == target_ppr_options)
1da177e4
LT		 1829 if (bootverbose == 0)
1830 break;
1831
b1abb4d6
JB		 1832 spi_period(starget) = tinfo->curr.period;
1833 spi_width(starget) = tinfo->curr.width;
1834 spi_offset(starget) = tinfo->curr.offset;
1835 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
1836 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
1837 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
1838 spi_display_xfer_agreement(starget);
1da177e4
LT		 1839 break;
1840 }
1841 case AC_SENT_BDR:
1842 {
1da177e4
LT		 1843 WARN_ON(lun != CAM_LUN_WILDCARD);
1844 scsi_report_device_reset(ahc->platform_data->host,
1845 channel - 'A', target);
1da177e4
LT		 1846 break;
1847 }
1848 case AC_BUS_RESET:
1849 if (ahc->platform_data->host != NULL) {
1850 scsi_report_bus_reset(ahc->platform_data->host,
1851 channel - 'A');
1852 }
1853 break;
1854 default:
1855 panic("ahc_send_async: Unexpected async event");
1856 }
1857}
1858
1859/*
1860 * Calls the higher level scsi done function and frees the scb.
1861 */
1862void
1863ahc_done(struct ahc_softc *ahc, struct scb *scb)
1864{
013791ee 1865 struct scsi_cmnd *cmd;
1da177e4
LT		 1866 struct ahc_linux_device *dev;
1867
1868 LIST_REMOVE(scb, pending_links);
1869 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1870 struct scb_tailq *untagged_q;
1871 int target_offset;
1872
1873 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1874 untagged_q = &(ahc->untagged_queues[target_offset]);
1875 TAILQ_REMOVE(untagged_q, scb, links.tqe);
e4e360c3 1876 BUG_ON(!TAILQ_EMPTY(untagged_q));
1da177e4
LT		 1877 }
1878
1879 if ((scb->flags & SCB_ACTIVE) == 0) {
1880 printf("SCB %d done'd twice\n", scb->hscb->tag);
1881 ahc_dump_card_state(ahc);
1882 panic("Stopping for safety");
1883 }
1884 cmd = scb->io_ctx;
1885 dev = scb->platform_data->dev;
1886 dev->active--;
1887 dev->openings++;
1888 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1889 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1890 dev->qfrozen--;
1891 }
1892 ahc_linux_unmap_scb(ahc, scb);
1893
1894 /*
1895 * Guard against stale sense data.
1896 * The Linux mid-layer assumes that sense
1897 * was retrieved anytime the first byte of
1898 * the sense buffer looks "sane".
1899 */
1900 cmd->sense_buffer[0] = 0;
1901 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1902 uint32_t amount_xferred;
1903
1904 amount_xferred =
1905 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1906 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1907#ifdef AHC_DEBUG
1908 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1909 ahc_print_path(ahc, scb);
1910 printf("Set CAM_UNCOR_PARITY\n");
1911 }
1912#endif
1913 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1914#ifdef AHC_REPORT_UNDERFLOWS
1915 /*
1916 * This code is disabled by default as some
1917 * clients of the SCSI system do not properly
1918 * initialize the underflow parameter. This
1919 * results in spurious termination of commands
1920 * that complete as expected (e.g. underflow is
1921 * allowed as command can return variable amounts
1922 * of data.
1923 */
1924 } else if (amount_xferred < scb->io_ctx->underflow) {
1925 u_int i;
1926
1927 ahc_print_path(ahc, scb);
1928 printf("CDB:");
1929 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1930 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1931 printf("\n");
1932 ahc_print_path(ahc, scb);
1933 printf("Saw underflow (%ld of %ld bytes). "
1934 "Treated as error\n",
1935 ahc_get_residual(scb),
1936 ahc_get_transfer_length(scb));
1937 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1938#endif
1939 } else {
1940 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1941 }
1942 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
b1abb4d6 1943 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1da177e4 1944 }
1da177e4
LT		 1945
1946 if (dev->openings == 1
1947 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1948 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1949 dev->tag_success_count++;
1950 /*
1951 * Some devices deal with temporary internal resource
1952 * shortages by returning queue full. When the queue
1953 * full occurrs, we throttle back. Slowly try to get
1954 * back to our previous queue depth.
1955 */
1956 if ((dev->openings + dev->active) < dev->maxtags
1957 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1958 dev->tag_success_count = 0;
1959 dev->openings++;
1960 }
1961
1962 if (dev->active == 0)
1963 dev->commands_since_idle_or_otag = 0;
1964
1da177e4
LT		 1965 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1966 printf("Recovery SCB completes\n");
1967 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1968 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1969 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1970 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
1971 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
1972 up(&ahc->platform_data->eh_sem);
1973 }
1974 }
1975
1976 ahc_free_scb(ahc, scb);
1977 ahc_linux_queue_cmd_complete(ahc, cmd);
1da177e4
LT		 1978}
1979
1980static void
1981ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
b1abb4d6 1982 struct scsi_device *sdev, struct scb *scb)
1da177e4
LT		 1983{
1984 struct ahc_devinfo devinfo;
b1abb4d6 1985 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1da177e4
LT		 1986
1987 ahc_compile_devinfo(&devinfo,
1988 ahc->our_id,
b1abb4d6
JB		 1989 sdev->sdev_target->id, sdev->lun,
1990 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1da177e4
LT		 1991 ROLE_INITIATOR);
1992
1993 /*
1994 * We don't currently trust the mid-layer to
1995 * properly deal with queue full or busy. So,
1996 * when one occurs, we tell the mid-layer to
1997 * unconditionally requeue the command to us
1998 * so that we can retry it ourselves. We also
1999 * implement our own throttling mechanism so
2000 * we don't clobber the device with too many
2001 * commands.
2002 */
2003 switch (ahc_get_scsi_status(scb)) {
2004 default:
2005 break;
2006 case SCSI_STATUS_CHECK_COND:
2007 case SCSI_STATUS_CMD_TERMINATED:
2008 {
013791ee 2009 struct scsi_cmnd *cmd;
1da177e4
LT		 2010
2011 /*
2012 * Copy sense information to the OS's cmd
2013 * structure if it is available.
2014 */
2015 cmd = scb->io_ctx;
2016 if (scb->flags & SCB_SENSE) {
2017 u_int sense_size;
2018
2019 sense_size = MIN(sizeof(struct scsi_sense_data)
2020 - ahc_get_sense_residual(scb),
2021 sizeof(cmd->sense_buffer));
2022 memcpy(cmd->sense_buffer,
2023 ahc_get_sense_buf(ahc, scb), sense_size);
2024 if (sense_size < sizeof(cmd->sense_buffer))
2025 memset(&cmd->sense_buffer[sense_size], 0,
2026 sizeof(cmd->sense_buffer) - sense_size);
2027 cmd->result |= (DRIVER_SENSE << 24);
2028#ifdef AHC_DEBUG
2029 if (ahc_debug & AHC_SHOW_SENSE) {
2030 int i;
2031
2032 printf("Copied %d bytes of sense data:",
2033 sense_size);
2034 for (i = 0; i < sense_size; i++) {
2035 if ((i & 0xF) == 0)
2036 printf("\n");
2037 printf("0x%x ", cmd->sense_buffer[i]);
2038 }
2039 printf("\n");
2040 }
2041#endif
2042 }
2043 break;
2044 }
2045 case SCSI_STATUS_QUEUE_FULL:
2046 {
2047 /*
2048 * By the time the core driver has returned this
2049 * command, all other commands that were queued
2050 * to us but not the device have been returned.
2051 * This ensures that dev->active is equal to
2052 * the number of commands actually queued to
2053 * the device.
2054 */
2055 dev->tag_success_count = 0;
2056 if (dev->active != 0) {
2057 /*
2058 * Drop our opening count to the number
2059 * of commands currently outstanding.
2060 */
2061 dev->openings = 0;
2062/*
2063 ahc_print_path(ahc, scb);
2064 printf("Dropping tag count to %d\n", dev->active);
2065 */
2066 if (dev->active == dev->tags_on_last_queuefull) {
2067
2068 dev->last_queuefull_same_count++;
2069 /*
2070 * If we repeatedly see a queue full
2071 * at the same queue depth, this
2072 * device has a fixed number of tag
2073 * slots. Lock in this tag depth
2074 * so we stop seeing queue fulls from
2075 * this device.
2076 */
2077 if (dev->last_queuefull_same_count
2078 == AHC_LOCK_TAGS_COUNT) {
2079 dev->maxtags = dev->active;
2080 ahc_print_path(ahc, scb);
2081 printf("Locking max tag count at %d\n",
2082 dev->active);
2083 }
2084 } else {
2085 dev->tags_on_last_queuefull = dev->active;
2086 dev->last_queuefull_same_count = 0;
2087 }
2088 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
2089 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
2090 ahc_platform_set_tags(ahc, &devinfo,
2091 (dev->flags & AHC_DEV_Q_BASIC)
2092 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
2093 break;
2094 }
2095 /*
2096 * Drop down to a single opening, and treat this
2097 * as if the target returned BUSY SCSI status.
2098 */
2099 dev->openings = 1;
2100 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
2101 ahc_platform_set_tags(ahc, &devinfo,
2102 (dev->flags & AHC_DEV_Q_BASIC)
2103 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1da177e4
LT		 2104 break;
2105 }
2106 }
2107}
2108
2109static void
013791ee 2110ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1da177e4 2111{
1da177e4
LT		 2112 /*
2113 * Map CAM error codes into Linux Error codes. We
2114 * avoid the conversion so that the DV code has the
2115 * full error information available when making
2116 * state change decisions.
2117 */
cb624029 2118 {
1da177e4
LT		 2119 u_int new_status;
2120
2121 switch (ahc_cmd_get_transaction_status(cmd)) {
2122 case CAM_REQ_INPROG:
2123 case CAM_REQ_CMP:
2124 case CAM_SCSI_STATUS_ERROR:
2125 new_status = DID_OK;
2126 break;
2127 case CAM_REQ_ABORTED:
2128 new_status = DID_ABORT;
2129 break;
2130 case CAM_BUSY:
2131 new_status = DID_BUS_BUSY;
2132 break;
2133 case CAM_REQ_INVALID:
2134 case CAM_PATH_INVALID:
2135 new_status = DID_BAD_TARGET;
2136 break;
2137 case CAM_SEL_TIMEOUT:
2138 new_status = DID_NO_CONNECT;
2139 break;
2140 case CAM_SCSI_BUS_RESET:
2141 case CAM_BDR_SENT:
2142 new_status = DID_RESET;
2143 break;
2144 case CAM_UNCOR_PARITY:
2145 new_status = DID_PARITY;
2146 break;
2147 case CAM_CMD_TIMEOUT:
2148 new_status = DID_TIME_OUT;
2149 break;
2150 case CAM_UA_ABORT:
2151 case CAM_REQ_CMP_ERR:
2152 case CAM_AUTOSENSE_FAIL:
2153 case CAM_NO_HBA:
2154 case CAM_DATA_RUN_ERR:
2155 case CAM_UNEXP_BUSFREE:
2156 case CAM_SEQUENCE_FAIL:
2157 case CAM_CCB_LEN_ERR:
2158 case CAM_PROVIDE_FAIL:
2159 case CAM_REQ_TERMIO:
2160 case CAM_UNREC_HBA_ERROR:
2161 case CAM_REQ_TOO_BIG:
2162 new_status = DID_ERROR;
2163 break;
2164 case CAM_REQUEUE_REQ:
8e45ebcc 2165 new_status = DID_REQUEUE;
1da177e4
LT		 2166 break;
2167 default:
2168 /* We should never get here */
2169 new_status = DID_ERROR;
2170 break;
2171 }
2172
2173 ahc_cmd_set_transaction_status(cmd, new_status);
2174 }
2175
8e45ebcc 2176 cmd->scsi_done(cmd);
1da177e4
LT		 2177}
2178
1da177e4
LT		 2179static void
2180ahc_linux_sem_timeout(u_long arg)
2181{
2182 struct ahc_softc *ahc;
2183 u_long s;
2184
2185 ahc = (struct ahc_softc *)arg;
2186
2187 ahc_lock(ahc, &s);
2188 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2189 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2190 up(&ahc->platform_data->eh_sem);
2191 }
2192 ahc_unlock(ahc, &s);
2193}
2194
2195static void
2196ahc_linux_freeze_simq(struct ahc_softc *ahc)
2197{
2198 ahc->platform_data->qfrozen++;
2199 if (ahc->platform_data->qfrozen == 1) {
2200 scsi_block_requests(ahc->platform_data->host);
2201
2202 /* XXX What about Twin channels? */
2203 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2204 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2205 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2206 }
2207}
2208
2209static void
2210ahc_linux_release_simq(u_long arg)
2211{
2212 struct ahc_softc *ahc;
2213 u_long s;
2214 int unblock_reqs;
2215
2216 ahc = (struct ahc_softc *)arg;
2217
2218 unblock_reqs = 0;
2219 ahc_lock(ahc, &s);
2220 if (ahc->platform_data->qfrozen > 0)
2221 ahc->platform_data->qfrozen--;
2222 if (ahc->platform_data->qfrozen == 0)
2223 unblock_reqs = 1;
1da177e4
LT		 2224 ahc_unlock(ahc, &s);
2225 /*
2226 * There is still a race here. The mid-layer
2227 * should keep its own freeze count and use
2228 * a bottom half handler to run the queues
2229 * so we can unblock with our own lock held.
2230 */
2231 if (unblock_reqs)
2232 scsi_unblock_requests(ahc->platform_data->host);
2233}
2234
1da177e4 2235static int
013791ee 2236ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
1da177e4
LT		 2237{
2238 struct ahc_softc *ahc;
1da177e4
LT		 2239 struct ahc_linux_device *dev;
2240 struct scb *pending_scb;
1da177e4
LT		 2241 u_int saved_scbptr;
2242 u_int active_scb_index;
2243 u_int last_phase;
2244 u_int saved_scsiid;
2245 u_int cdb_byte;
2246 int retval;
2247 int was_paused;
2248 int paused;
2249 int wait;
2250 int disconnected;
2251
2252 pending_scb = NULL;
2253 paused = FALSE;
2254 wait = FALSE;
2255 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
1da177e4
LT		 2256
2257 printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
2258 ahc_name(ahc), cmd->device->channel,
2259 cmd->device->id, cmd->device->lun,
2260 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2261
2262 printf("CDB:");
2263 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2264 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2265 printf("\n");
2266
1da177e4
LT		 2267 /*
2268 * First determine if we currently own this command.
2269 * Start by searching the device queue. If not found
2270 * there, check the pending_scb list. If not found
2271 * at all, and the system wanted us to just abort the
2272 * command, return success.
2273 */
b1abb4d6 2274 dev = scsi_transport_device_data(cmd->device);
1da177e4
LT		 2275
2276 if (dev == NULL) {
2277 /*
2278 * No target device for this command exists,
2279 * so we must not still own the command.
2280 */
2281 printf("%s:%d:%d:%d: Is not an active device\n",
2282 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2283 cmd->device->lun);
2284 retval = SUCCESS;
2285 goto no_cmd;
2286 }
2287
1da177e4
LT		 2288 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2289 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2290 cmd->device->channel + 'A',
2291 cmd->device->lun,
2292 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2293 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2294 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2295 cmd->device->lun);
2296 retval = SUCCESS;
2297 goto done;
2298 }
2299
2300 /*
2301 * See if we can find a matching cmd in the pending list.
2302 */
2303 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2304 if (pending_scb->io_ctx == cmd)
2305 break;
2306 }
2307
2308 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2309
2310 /* Any SCB for this device will do for a target reset */
2311 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2312 if (ahc_match_scb(ahc, pending_scb, cmd->device->id,
2313 cmd->device->channel + 'A',
2314 CAM_LUN_WILDCARD,
2315 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2316 break;
2317 }
2318 }
2319
2320 if (pending_scb == NULL) {
2321 printf("%s:%d:%d:%d: Command not found\n",
2322 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2323 cmd->device->lun);
2324 goto no_cmd;
2325 }
2326
2327 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2328 /*
2329 * We can't queue two recovery actions using the same SCB
2330 */
2331 retval = FAILED;
2332 goto done;
2333 }
2334
2335 /*
2336 * Ensure that the card doesn't do anything
2337 * behind our back and that we didn't "just" miss
2338 * an interrupt that would affect this cmd.
2339 */
2340 was_paused = ahc_is_paused(ahc);
2341 ahc_pause_and_flushwork(ahc);
2342 paused = TRUE;
2343
2344 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2345 printf("%s:%d:%d:%d: Command already completed\n",
2346 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2347 cmd->device->lun);
2348 goto no_cmd;
2349 }
2350
2351 printf("%s: At time of recovery, card was %spaused\n",
2352 ahc_name(ahc), was_paused ? "" : "not ");
2353 ahc_dump_card_state(ahc);
2354
2355 disconnected = TRUE;
2356 if (flag == SCB_ABORT) {
2357 if (ahc_search_qinfifo(ahc, cmd->device->id,
2358 cmd->device->channel + 'A',
2359 cmd->device->lun,
2360 pending_scb->hscb->tag,
2361 ROLE_INITIATOR, CAM_REQ_ABORTED,
2362 SEARCH_COMPLETE) > 0) {
2363 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2364 ahc_name(ahc), cmd->device->channel,
2365 cmd->device->id, cmd->device->lun);
2366 retval = SUCCESS;
2367 goto done;
2368 }
2369 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2370 cmd->device->channel + 'A',
2371 cmd->device->lun, pending_scb->hscb->tag,
2372 ROLE_INITIATOR, /*status*/0,
2373 SEARCH_COUNT) > 0) {
2374 disconnected = FALSE;
2375 }
2376
2377 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2378 struct scb *bus_scb;
2379
2380 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2381 if (bus_scb == pending_scb)
2382 disconnected = FALSE;
2383 else if (flag != SCB_ABORT
2384 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2385 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2386 disconnected = FALSE;
2387 }
2388
2389 /*
2390 * At this point, pending_scb is the scb associated with the
2391 * passed in command. That command is currently active on the
2392 * bus, is in the disconnected state, or we're hoping to find
2393 * a command for the same target active on the bus to abuse to
2394 * send a BDR. Queue the appropriate message based on which of
2395 * these states we are in.
2396 */
2397 last_phase = ahc_inb(ahc, LASTPHASE);
2398 saved_scbptr = ahc_inb(ahc, SCBPTR);
2399 active_scb_index = ahc_inb(ahc, SCB_TAG);
2400 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2401 if (last_phase != P_BUSFREE
2402 && (pending_scb->hscb->tag == active_scb_index
2403 || (flag == SCB_DEVICE_RESET
2404 && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) {
2405
2406 /*
2407 * We're active on the bus, so assert ATN
2408 * and hope that the target responds.
2409 */
2410 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2411 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2412 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2413 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2414 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2415 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2416 cmd->device->lun);
2417 wait = TRUE;
2418 } else if (disconnected) {
2419
2420 /*
2421 * Actually re-queue this SCB in an attempt
2422 * to select the device before it reconnects.
2423 * In either case (selection or reselection),
2424 * we will now issue the approprate message
2425 * to the timed-out device.
2426 *
2427 * Set the MK_MESSAGE control bit indicating
2428 * that we desire to send a message. We
2429 * also set the disconnected flag since
2430 * in the paging case there is no guarantee
2431 * that our SCB control byte matches the
2432 * version on the card. We don't want the
2433 * sequencer to abort the command thinking
2434 * an unsolicited reselection occurred.
2435 */
2436 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2437 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2438
2439 /*
2440 * Remove any cached copy of this SCB in the
2441 * disconnected list in preparation for the
2442 * queuing of our abort SCB. We use the
2443 * same element in the SCB, SCB_NEXT, for
2444 * both the qinfifo and the disconnected list.
2445 */
2446 ahc_search_disc_list(ahc, cmd->device->id,
2447 cmd->device->channel + 'A',
2448 cmd->device->lun, pending_scb->hscb->tag,
2449 /*stop_on_first*/TRUE,
2450 /*remove*/TRUE,
2451 /*save_state*/FALSE);
2452
2453 /*
2454 * In the non-paging case, the sequencer will
2455 * never re-reference the in-core SCB.
2456 * To make sure we are notified during
2457 * reslection, set the MK_MESSAGE flag in
2458 * the card's copy of the SCB.
2459 */
2460 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2461 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2462 ahc_outb(ahc, SCB_CONTROL,
2463 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2464 }
2465
2466 /*
2467 * Clear out any entries in the QINFIFO first
2468 * so we are the next SCB for this target
2469 * to run.
2470 */
2471 ahc_search_qinfifo(ahc, cmd->device->id,
2472 cmd->device->channel + 'A',
2473 cmd->device->lun, SCB_LIST_NULL,
2474 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2475 SEARCH_COMPLETE);
2476 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2477 ahc_outb(ahc, SCBPTR, saved_scbptr);
2478 ahc_print_path(ahc, pending_scb);
2479 printf("Device is disconnected, re-queuing SCB\n");
2480 wait = TRUE;
2481 } else {
2482 printf("%s:%d:%d:%d: Unable to deliver message\n",
2483 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2484 cmd->device->lun);
2485 retval = FAILED;
2486 goto done;
2487 }
2488
2489no_cmd:
2490 /*
2491 * Our assumption is that if we don't have the command, no
2492 * recovery action was required, so we return success. Again,
2493 * the semantics of the mid-layer recovery engine are not
2494 * well defined, so this may change in time.
2495 */
2496 retval = SUCCESS;
2497done:
2498 if (paused)
2499 ahc_unpause(ahc);
2500 if (wait) {
2501 struct timer_list timer;
2502 int ret;
2503
2504 ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
2505 spin_unlock_irq(&ahc->platform_data->spin_lock);
2506 init_timer(&timer);
2507 timer.data = (u_long)ahc;
2508 timer.expires = jiffies + (5 * HZ);
2509 timer.function = ahc_linux_sem_timeout;
2510 add_timer(&timer);
2511 printf("Recovery code sleeping\n");
2512 down(&ahc->platform_data->eh_sem);
2513 printf("Recovery code awake\n");
2514 ret = del_timer_sync(&timer);
2515 if (ret == 0) {
2516 printf("Timer Expired\n");
2517 retval = FAILED;
2518 }
2519 spin_lock_irq(&ahc->platform_data->spin_lock);
2520 }
1da177e4
LT		 2521 return (retval);
2522}
2523
2524void
2525ahc_platform_dump_card_state(struct ahc_softc *ahc)
2526{
1da177e4
LT		 2527}
2528
2529static void ahc_linux_exit(void);
2530
fad01ef8
JB		 2531static void ahc_linux_set_width(struct scsi_target *starget, int width)
2532{
2533 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2534 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2535 struct ahc_devinfo devinfo;
2536 unsigned long flags;
2537
2538 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2539 starget->channel + 'A', ROLE_INITIATOR);
2540 ahc_lock(ahc, &flags);
2541 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2542 ahc_unlock(ahc, &flags);
2543}
2544
92d161c3
JB		 2545static void ahc_linux_set_period(struct scsi_target *starget, int period)
2546{
2547 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2548 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2549 struct ahc_tmode_tstate *tstate;
2550 struct ahc_initiator_tinfo *tinfo
2551 = ahc_fetch_transinfo(ahc,
2552 starget->channel + 'A',
2553 shost->this_id, starget->id, &tstate);
2554 struct ahc_devinfo devinfo;
597487b9 2555 unsigned int ppr_options = tinfo->goal.ppr_options;
92d161c3 2556 unsigned long flags;
597487b9 2557 unsigned long offset = tinfo->goal.offset;
92d161c3
JB		 2558 struct ahc_syncrate *syncrate;
2559
2560 if (offset == 0)
2561 offset = MAX_OFFSET;
2562
2bf2c568
JB		 2563 if (period < 9)
2564 period = 9; /* 12.5ns is our minimum */
2565 if (period == 9)
2566 ppr_options |= MSG_EXT_PPR_DT_REQ;
2567
92d161c3
JB		 2568 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2569 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8
JB		 2570
2571 /* all PPR requests apart from QAS require wide transfers */
2572 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
fad01ef8
JB		 2573 if (spi_width(starget) == 0)
2574 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2575 }
2576
92d161c3
JB		 2577 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2578 ahc_lock(ahc, &flags);
2579 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2580 ppr_options, AHC_TRANS_GOAL, FALSE);
2581 ahc_unlock(ahc, &flags);
2582}
2583
92d161c3
JB		 2584static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2585{
2586 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2587 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2588 struct ahc_tmode_tstate *tstate;
2589 struct ahc_initiator_tinfo *tinfo
2590 = ahc_fetch_transinfo(ahc,
2591 starget->channel + 'A',
2592 shost->this_id, starget->id, &tstate);
2593 struct ahc_devinfo devinfo;
2594 unsigned int ppr_options = 0;
2595 unsigned int period = 0;
2596 unsigned long flags;
2597 struct ahc_syncrate *syncrate = NULL;
2598
2599 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2600 starget->channel + 'A', ROLE_INITIATOR);
2601 if (offset != 0) {
2602 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
597487b9
JB		 2603 period = tinfo->goal.period;
2604 ppr_options = tinfo->goal.ppr_options;
92d161c3
JB		 2605 }
2606 ahc_lock(ahc, &flags);
2607 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2608 ppr_options, AHC_TRANS_GOAL, FALSE);
2609 ahc_unlock(ahc, &flags);
2610}
2611
92d161c3
JB		 2612static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2613{
2614 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2615 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2616 struct ahc_tmode_tstate *tstate;
2617 struct ahc_initiator_tinfo *tinfo
2618 = ahc_fetch_transinfo(ahc,
2619 starget->channel + 'A',
2620 shost->this_id, starget->id, &tstate);
2621 struct ahc_devinfo devinfo;
597487b9 2622 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2623 & ~MSG_EXT_PPR_DT_REQ;
597487b9 2624 unsigned int period = tinfo->goal.period;
92d161c3
JB		 2625 unsigned long flags;
2626 struct ahc_syncrate *syncrate;
2627
2bf2c568
JB		 2628 if (dt) {
2629 period = 9; /* 12.5ns is the only period valid for DT */
2630 ppr_options |= MSG_EXT_PPR_DT_REQ;
2631 } else if (period == 9)
2632 period = 10; /* if resetting DT, period must be >= 25ns */
2633
92d161c3
JB		 2634 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2635 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2636 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
92d161c3 2637 ahc_lock(ahc, &flags);
597487b9 2638 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3
JB		 2639 ppr_options, AHC_TRANS_GOAL, FALSE);
2640 ahc_unlock(ahc, &flags);
2641}
2642
92d161c3
JB		 2643static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2644{
2645 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2646 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2647 struct ahc_tmode_tstate *tstate;
2648 struct ahc_initiator_tinfo *tinfo
2649 = ahc_fetch_transinfo(ahc,
2650 starget->channel + 'A',
2651 shost->this_id, starget->id, &tstate);
2652 struct ahc_devinfo devinfo;
597487b9 2653 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2654 & ~MSG_EXT_PPR_QAS_REQ;
597487b9 2655 unsigned int period = tinfo->goal.period;
92d161c3
JB		 2656 unsigned long flags;
2657 struct ahc_syncrate *syncrate;
2658
2659 if (qas)
2660 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2661
2662 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2663 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2664 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2665 ahc_lock(ahc, &flags);
597487b9 2666 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3
JB		 2667 ppr_options, AHC_TRANS_GOAL, FALSE);
2668 ahc_unlock(ahc, &flags);
2669}
2670
92d161c3
JB		 2671static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2672{
2673 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2674 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2675 struct ahc_tmode_tstate *tstate;
2676 struct ahc_initiator_tinfo *tinfo
2677 = ahc_fetch_transinfo(ahc,
2678 starget->channel + 'A',
2679 shost->this_id, starget->id, &tstate);
2680 struct ahc_devinfo devinfo;
597487b9 2681 unsigned int ppr_options = tinfo->goal.ppr_options
92d161c3 2682 & ~MSG_EXT_PPR_IU_REQ;
597487b9 2683 unsigned int period = tinfo->goal.period;
92d161c3
JB		 2684 unsigned long flags;
2685 struct ahc_syncrate *syncrate;
2686
2687 if (iu)
2688 ppr_options |= MSG_EXT_PPR_IU_REQ;
2689
2690 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2691 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2692 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2693 ahc_lock(ahc, &flags);
597487b9 2694 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
92d161c3
JB		 2695 ppr_options, AHC_TRANS_GOAL, FALSE);
2696 ahc_unlock(ahc, &flags);
2697}
2698
2699static struct spi_function_template ahc_linux_transport_functions = {
92d161c3
JB		 2700 .set_offset = ahc_linux_set_offset,
2701 .show_offset = 1,
92d161c3
JB		 2702 .set_period = ahc_linux_set_period,
2703 .show_period = 1,
92d161c3
JB		 2704 .set_width = ahc_linux_set_width,
2705 .show_width = 1,
92d161c3
JB		 2706 .set_dt = ahc_linux_set_dt,
2707 .show_dt = 1,
92d161c3
JB		 2708 .set_iu = ahc_linux_set_iu,
2709 .show_iu = 1,
92d161c3
JB		 2710 .set_qas = ahc_linux_set_qas,
2711 .show_qas = 1,
2712};
2713
2714
2715
1da177e4
LT		 2716static int __init
2717ahc_linux_init(void)
2718{
92d161c3
JB		 2719 ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions);
2720 if (!ahc_linux_transport_template)
2721 return -ENODEV;
b1abb4d6
JB		 2722 scsi_transport_reserve_target(ahc_linux_transport_template,
2723 sizeof(struct ahc_linux_target));
2724 scsi_transport_reserve_device(ahc_linux_transport_template,
2725 sizeof(struct ahc_linux_device));
858eaca1
JB		 2726 if (ahc_linux_detect(&aic7xxx_driver_template))
2727 return 0;
92d161c3 2728 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 2729 ahc_linux_exit();
2730 return -ENODEV;
1da177e4
LT		 2731}
2732
2733static void
2734ahc_linux_exit(void)
2735{
1da177e4
LT		 2736 ahc_linux_pci_exit();
2737 ahc_linux_eisa_exit();
92d161c3 2738 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 2739}
2740
2741module_init(ahc_linux_init);
2742module_exit(ahc_linux_exit);
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