projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[SCSI] aic7xxx: remove the last vestiges of the runq
[deliverable/linux.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 125#include <scsi/scsi_transport.h>
126#include <scsi/scsi_transport_spi.h>
127
128static struct scsi_transport_template *ahc_linux_transport_template = NULL;
1da177e4
LT		 129
130/*
131 * Include aiclib.c as part of our
132 * "module dependencies are hard" work around.
133 */
134#include "aiclib.c"
135
136#include <linux/init.h> /* __setup */
1da177e4
LT		 137#include <linux/mm.h> /* For fetching system memory size */
138#include <linux/blkdev.h> /* For block_size() */
139#include <linux/delay.h> /* For ssleep/msleep */
140
141/*
142 * Lock protecting manipulation of the ahc softc list.
143 */
144spinlock_t ahc_list_spinlock;
145
1da177e4
LT		 146/*
147 * Set this to the delay in seconds after SCSI bus reset.
148 * Note, we honor this only for the initial bus reset.
149 * The scsi error recovery code performs its own bus settle
150 * delay handling for error recovery actions.
151 */
152#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
153#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
154#else
155#define AIC7XXX_RESET_DELAY 5000
156#endif
157
158/*
159 * Control collection of SCSI transfer statistics for the /proc filesystem.
160 *
161 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
162 * NOTE: This does affect performance since it has to maintain statistics.
163 */
164#ifdef CONFIG_AIC7XXX_PROC_STATS
165#define AIC7XXX_PROC_STATS
166#endif
167
168/*
169 * To change the default number of tagged transactions allowed per-device,
170 * add a line to the lilo.conf file like:
171 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
172 * which will result in the first four devices on the first two
173 * controllers being set to a tagged queue depth of 32.
174 *
175 * The tag_commands is an array of 16 to allow for wide and twin adapters.
176 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
177 * for channel 1.
178 */
179typedef struct {
180 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
181} adapter_tag_info_t;
182
183/*
184 * Modify this as you see fit for your system.
185 *
186 * 0 tagged queuing disabled
187 * 1 <= n <= 253 n == max tags ever dispatched.
188 *
189 * The driver will throttle the number of commands dispatched to a
190 * device if it returns queue full. For devices with a fixed maximum
191 * queue depth, the driver will eventually determine this depth and
192 * lock it in (a console message is printed to indicate that a lock
193 * has occurred). On some devices, queue full is returned for a temporary
194 * resource shortage. These devices will return queue full at varying
195 * depths. The driver will throttle back when the queue fulls occur and
196 * attempt to slowly increase the depth over time as the device recovers
197 * from the resource shortage.
198 *
199 * In this example, the first line will disable tagged queueing for all
200 * the devices on the first probed aic7xxx adapter.
201 *
202 * The second line enables tagged queueing with 4 commands/LUN for IDs
203 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
204 * driver to attempt to use up to 64 tags for ID 1.
205 *
206 * The third line is the same as the first line.
207 *
208 * The fourth line disables tagged queueing for devices 0 and 3. It
209 * enables tagged queueing for the other IDs, with 16 commands/LUN
210 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
211 * IDs 2, 5-7, and 9-15.
212 */
213
214/*
215 * NOTE: The below structure is for reference only, the actual structure
216 * to modify in order to change things is just below this comment block.
217adapter_tag_info_t aic7xxx_tag_info[] =
218{
219 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
220 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
221 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
222 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
223};
224*/
225
226#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
227#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
228#else
229#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
230#endif
231
232#define AIC7XXX_CONFIGED_TAG_COMMANDS { \
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 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
240 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
241}
242
243/*
244 * By default, use the number of commands specified by
245 * the users kernel configuration.
246 */
247static adapter_tag_info_t aic7xxx_tag_info[] =
248{
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 {AIC7XXX_CONFIGED_TAG_COMMANDS},
264 {AIC7XXX_CONFIGED_TAG_COMMANDS}
265};
266
1da177e4
LT		 267/*
268 * There should be a specific return value for this in scsi.h, but
269 * it seems that most drivers ignore it.
270 */
271#define DID_UNDERFLOW DID_ERROR
272
273void
274ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
275{
276 printk("(scsi%d:%c:%d:%d): ",
277 ahc->platform_data->host->host_no,
278 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
279 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
280 scb != NULL ? SCB_GET_LUN(scb) : -1);
281}
282
283/*
284 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
285 * cards in the system. This should be fixed. Exceptions to this
286 * rule are noted in the comments.
287 */
288
289/*
290 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
291 * has no effect on any later resets that might occur due to things like
292 * SCSI bus timeouts.
293 */
294static uint32_t aic7xxx_no_reset;
295
296/*
297 * Certain PCI motherboards will scan PCI devices from highest to lowest,
298 * others scan from lowest to highest, and they tend to do all kinds of
299 * strange things when they come into contact with PCI bridge chips. The
300 * net result of all this is that the PCI card that is actually used to boot
301 * the machine is very hard to detect. Most motherboards go from lowest
302 * PCI slot number to highest, and the first SCSI controller found is the
303 * one you boot from. The only exceptions to this are when a controller
304 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
305 * from lowest PCI slot number to highest PCI slot number. We also force
306 * all controllers with their BIOS disabled to the end of the list. This
307 * works on *almost* all computers. Where it doesn't work, we have this
308 * option. Setting this option to non-0 will reverse the order of the sort
309 * to highest first, then lowest, but will still leave cards with their BIOS
310 * disabled at the very end. That should fix everyone up unless there are
311 * really strange cirumstances.
312 */
313static uint32_t aic7xxx_reverse_scan;
314
315/*
316 * Should we force EXTENDED translation on a controller.
317 * 0 == Use whatever is in the SEEPROM or default to off
318 * 1 == Use whatever is in the SEEPROM or default to on
319 */
320static uint32_t aic7xxx_extended;
321
322/*
323 * PCI bus parity checking of the Adaptec controllers. This is somewhat
324 * dubious at best. To my knowledge, this option has never actually
325 * solved a PCI parity problem, but on certain machines with broken PCI
326 * chipset configurations where stray PCI transactions with bad parity are
327 * the norm rather than the exception, the error messages can be overwelming.
328 * It's included in the driver for completeness.
329 * 0 = Shut off PCI parity check
330 * non-0 = reverse polarity pci parity checking
331 */
332static uint32_t aic7xxx_pci_parity = ~0;
333
334/*
335 * Certain newer motherboards have put new PCI based devices into the
336 * IO spaces that used to typically be occupied by VLB or EISA cards.
337 * This overlap can cause these newer motherboards to lock up when scanned
338 * for older EISA and VLB devices. Setting this option to non-0 will
339 * cause the driver to skip scanning for any VLB or EISA controllers and
340 * only support the PCI controllers. NOTE: this means that if the kernel
341 * os compiled with PCI support disabled, then setting this to non-0
342 * would result in never finding any devices :)
343 */
344#ifndef CONFIG_AIC7XXX_PROBE_EISA_VL
345uint32_t aic7xxx_probe_eisa_vl;
346#else
347uint32_t aic7xxx_probe_eisa_vl = ~0;
348#endif
349
350/*
351 * There are lots of broken chipsets in the world. Some of them will
352 * violate the PCI spec when we issue byte sized memory writes to our
353 * controller. I/O mapped register access, if allowed by the given
354 * platform, will work in almost all cases.
355 */
356uint32_t aic7xxx_allow_memio = ~0;
357
358/*
359 * aic7xxx_detect() has been run, so register all device arrivals
360 * immediately with the system rather than deferring to the sorted
361 * attachment performed by aic7xxx_detect().
362 */
363int aic7xxx_detect_complete;
364
365/*
366 * So that we can set how long each device is given as a selection timeout.
367 * The table of values goes like this:
368 * 0 - 256ms
369 * 1 - 128ms
370 * 2 - 64ms
371 * 3 - 32ms
372 * We default to 256ms because some older devices need a longer time
373 * to respond to initial selection.
374 */
375static uint32_t aic7xxx_seltime;
376
377/*
378 * Certain devices do not perform any aging on commands. Should the
379 * device be saturated by commands in one portion of the disk, it is
380 * possible for transactions on far away sectors to never be serviced.
381 * To handle these devices, we can periodically send an ordered tag to
382 * force all outstanding transactions to be serviced prior to a new
383 * transaction.
384 */
385uint32_t aic7xxx_periodic_otag;
386
387/*
388 * Module information and settable options.
389 */
390static char *aic7xxx = NULL;
391
392MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
393MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
394MODULE_LICENSE("Dual BSD/GPL");
395MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
396module_param(aic7xxx, charp, 0444);
397MODULE_PARM_DESC(aic7xxx,
398"period delimited, options string.\n"
399" verbose Enable verbose/diagnostic logging\n"
400" allow_memio Allow device registers to be memory mapped\n"
401" debug Bitmask of debug values to enable\n"
402" no_probe Toggle EISA/VLB controller probing\n"
403" probe_eisa_vl Toggle EISA/VLB controller probing\n"
404" no_reset Supress initial bus resets\n"
405" extended Enable extended geometry on all controllers\n"
406" periodic_otag Send an ordered tagged transaction\n"
407" periodically to prevent tag starvation.\n"
408" This may be required by some older disk\n"
409" drives or RAID arrays.\n"
410" reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
411" tag_info:<tag_str> Set per-target tag depth\n"
412" global_tag_depth:<int> Global tag depth for every target\n"
413" on every bus\n"
1da177e4
LT		 414" seltime:<int> Selection Timeout\n"
415" (0/256ms,1/128ms,2/64ms,3/32ms)\n"
416"\n"
417" Sample /etc/modprobe.conf line:\n"
418" Toggle EISA/VLB probing\n"
419" Set tag depth on Controller 1/Target 1 to 10 tags\n"
420" Shorten the selection timeout to 128ms\n"
421"\n"
422" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
423);
424
425static void ahc_linux_handle_scsi_status(struct ahc_softc *,
426 struct ahc_linux_device *,
427 struct scb *);
428static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
013791ee 429 struct scsi_cmnd *cmd);
1da177e4
LT		 430static void ahc_linux_sem_timeout(u_long arg);
431static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
432static void ahc_linux_release_simq(u_long arg);
433static void ahc_linux_dev_timed_unfreeze(u_long arg);
013791ee 434static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
1da177e4 435static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
1da177e4 436static void ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc);
1da177e4
LT		 437static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
438 struct ahc_devinfo *devinfo);
1da177e4
LT		 439static void ahc_linux_device_queue_depth(struct ahc_softc *ahc,
440 struct ahc_linux_device *dev);
441static struct ahc_linux_target* ahc_linux_alloc_target(struct ahc_softc*,
442 u_int, u_int);
443static void ahc_linux_free_target(struct ahc_softc*,
444 struct ahc_linux_target*);
445static struct ahc_linux_device* ahc_linux_alloc_device(struct ahc_softc*,
446 struct ahc_linux_target*,
447 u_int);
448static void ahc_linux_free_device(struct ahc_softc*,
449 struct ahc_linux_device*);
e4e360c3
JB		 450static int ahc_linux_run_command(struct ahc_softc*,
451 struct ahc_linux_device *,
452 struct scsi_cmnd *);
1da177e4
LT		 453static void ahc_linux_setup_tag_info_global(char *p);
454static aic_option_callback_t ahc_linux_setup_tag_info;
1da177e4
LT		 455static int aic7xxx_setup(char *s);
456static int ahc_linux_next_unit(void);
1da177e4
LT		 457static struct ahc_cmd *ahc_linux_run_complete_queue(struct ahc_softc *ahc);
458
459/********************************* Inlines ************************************/
1da177e4
LT		 460static __inline struct ahc_linux_device*
461 ahc_linux_get_device(struct ahc_softc *ahc, u_int channel,
462 u_int target, u_int lun, int alloc);
463static __inline void ahc_schedule_completeq(struct ahc_softc *ahc);
1da177e4
LT		 464static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
465
466static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
467 struct ahc_dma_seg *sg,
468 dma_addr_t addr, bus_size_t len);
469
470static __inline void
471ahc_schedule_completeq(struct ahc_softc *ahc)
472{
473 if ((ahc->platform_data->flags & AHC_RUN_CMPLT_Q_TIMER) == 0) {
474 ahc->platform_data->flags |= AHC_RUN_CMPLT_Q_TIMER;
475 ahc->platform_data->completeq_timer.expires = jiffies;
476 add_timer(&ahc->platform_data->completeq_timer);
477 }
478}
479
1da177e4
LT		 480static __inline struct ahc_linux_device*
481ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
482 u_int lun, int alloc)
483{
484 struct ahc_linux_target *targ;
485 struct ahc_linux_device *dev;
486 u_int target_offset;
487
488 target_offset = target;
489 if (channel != 0)
490 target_offset += 8;
491 targ = ahc->platform_data->targets[target_offset];
492 if (targ == NULL) {
493 if (alloc != 0) {
494 targ = ahc_linux_alloc_target(ahc, channel, target);
495 if (targ == NULL)
496 return (NULL);
497 } else
498 return (NULL);
499 }
500 dev = targ->devices[lun];
501 if (dev == NULL && alloc != 0)
502 dev = ahc_linux_alloc_device(ahc, targ, lun);
503 return (dev);
504}
505
506#define AHC_LINUX_MAX_RETURNED_ERRORS 4
507static struct ahc_cmd *
508ahc_linux_run_complete_queue(struct ahc_softc *ahc)
509{
510 struct ahc_cmd *acmd;
1da177e4
LT		 511 int with_errors;
512
513 with_errors = 0;
1da177e4 514 while ((acmd = TAILQ_FIRST(&ahc->platform_data->completeq)) != NULL) {
013791ee 515 struct scsi_cmnd *cmd;
1da177e4
LT		 516
517 if (with_errors > AHC_LINUX_MAX_RETURNED_ERRORS) {
518 /*
519 * Linux uses stack recursion to requeue
520 * commands that need to be retried. Avoid
521 * blowing out the stack by "spoon feeding"
522 * commands that completed with error back
523 * the operating system in case they are going
524 * to be retried. "ick"
525 */
526 ahc_schedule_completeq(ahc);
527 break;
528 }
529 TAILQ_REMOVE(&ahc->platform_data->completeq,
530 acmd, acmd_links.tqe);
531 cmd = &acmd_scsi_cmd(acmd);
532 cmd->host_scribble = NULL;
533 if (ahc_cmd_get_transaction_status(cmd) != DID_OK
534 || (cmd->result & 0xFF) != SCSI_STATUS_OK)
535 with_errors++;
536
537 cmd->scsi_done(cmd);
538 }
1da177e4
LT		 539 return (acmd);
540}
541
1da177e4
LT		 542static __inline void
543ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
544{
013791ee 545 struct scsi_cmnd *cmd;
1da177e4
LT		 546
547 cmd = scb->io_ctx;
548 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
549 if (cmd->use_sg != 0) {
550 struct scatterlist *sg;
551
552 sg = (struct scatterlist *)cmd->request_buffer;
553 pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg,
be7db055 554 cmd->sc_data_direction);
1da177e4
LT		 555 } else if (cmd->request_bufflen != 0) {
556 pci_unmap_single(ahc->dev_softc,
557 scb->platform_data->buf_busaddr,
558 cmd->request_bufflen,
be7db055 559 cmd->sc_data_direction);
1da177e4
LT		 560 }
561}
562
563static __inline int
564ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
565 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
566{
567 int consumed;
568
569 if ((scb->sg_count + 1) > AHC_NSEG)
570 panic("Too few segs for dma mapping. "
571 "Increase AHC_NSEG\n");
572
573 consumed = 1;
574 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
575 scb->platform_data->xfer_len += len;
576
577 if (sizeof(dma_addr_t) > 4
578 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
579 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
580
581 sg->len = ahc_htole32(len);
582 return (consumed);
583}
584
1da177e4
LT		 585/*
586 * Try to detect an Adaptec 7XXX controller.
587 */
588static int
013791ee 589ahc_linux_detect(struct scsi_host_template *template)
1da177e4
LT		 590{
591 struct ahc_softc *ahc;
592 int found = 0;
593
1da177e4
LT		 594 /*
595 * Sanity checking of Linux SCSI data structures so
596 * that some of our hacks^H^H^H^H^Hassumptions aren't
597 * violated.
598 */
599 if (offsetof(struct ahc_cmd_internal, end)
600 > offsetof(struct scsi_cmnd, host_scribble)) {
601 printf("ahc_linux_detect: SCSI data structures changed.\n");
602 printf("ahc_linux_detect: Unable to attach\n");
603 return (0);
604 }
1da177e4
LT		 605 /*
606 * If we've been passed any parameters, process them now.
607 */
608 if (aic7xxx)
609 aic7xxx_setup(aic7xxx);
610
611 template->proc_name = "aic7xxx";
612
613 /*
614 * Initialize our softc list lock prior to
615 * probing for any adapters.
616 */
617 ahc_list_lockinit();
618
619 found = ahc_linux_pci_init();
620 if (!ahc_linux_eisa_init())
621 found++;
622
623 /*
624 * Register with the SCSI layer all
625 * controllers we've found.
626 */
627 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
628
629 if (ahc_linux_register_host(ahc, template) == 0)
630 found++;
631 }
632
1da177e4
LT		 633 aic7xxx_detect_complete++;
634
635 return (found);
636}
637
1da177e4
LT		 638/*
639 * Return a string describing the driver.
640 */
641static const char *
642ahc_linux_info(struct Scsi_Host *host)
643{
644 static char buffer[512];
645 char ahc_info[256];
646 char *bp;
647 struct ahc_softc *ahc;
648
649 bp = &buffer[0];
650 ahc = *(struct ahc_softc **)host->hostdata;
651 memset(bp, 0, sizeof(buffer));
652 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
653 strcat(bp, AIC7XXX_DRIVER_VERSION);
654 strcat(bp, "\n");
655 strcat(bp, " <");
656 strcat(bp, ahc->description);
657 strcat(bp, ">\n");
658 strcat(bp, " ");
659 ahc_controller_info(ahc, ahc_info);
660 strcat(bp, ahc_info);
661 strcat(bp, "\n");
662
663 return (bp);
664}
665
666/*
667 * Queue an SCB to the controller.
668 */
669static int
013791ee 670ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
1da177e4
LT		 671{
672 struct ahc_softc *ahc;
673 struct ahc_linux_device *dev;
1da177e4
LT		 674
675 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
676
677 /*
678 * Save the callback on completion function.
679 */
680 cmd->scsi_done = scsi_done;
681
1da177e4
LT		 682 /*
683 * Close the race of a command that was in the process of
684 * being queued to us just as our simq was frozen. Let
685 * DV commands through so long as we are only frozen to
686 * perform DV.
687 */
e4e360c3
JB		 688 if (ahc->platform_data->qfrozen != 0)
689 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 690
1da177e4
LT		 691 dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
692 cmd->device->lun, /*alloc*/TRUE);
e4e360c3
JB		 693 BUG_ON(dev == NULL);
694
1da177e4 695 cmd->result = CAM_REQ_INPROG << 16;
e4e360c3
JB		 696
697 return ahc_linux_run_command(ahc, dev, cmd);
1da177e4
LT		 698}
699
1da177e4 700static int
013791ee 701ahc_linux_slave_alloc(struct scsi_device *device)
1da177e4
LT		 702{
703 struct ahc_softc *ahc;
704
705 ahc = *((struct ahc_softc **)device->host->hostdata);
706 if (bootverbose)
707 printf("%s: Slave Alloc %d\n", ahc_name(ahc), device->id);
708 return (0);
709}
710
711static int
013791ee 712ahc_linux_slave_configure(struct scsi_device *device)
1da177e4
LT		 713{
714 struct ahc_softc *ahc;
715 struct ahc_linux_device *dev;
1da177e4
LT		 716
717 ahc = *((struct ahc_softc **)device->host->hostdata);
718 if (bootverbose)
719 printf("%s: Slave Configure %d\n", ahc_name(ahc), device->id);
1da177e4
LT		 720 /*
721 * Since Linux has attached to the device, configure
722 * it so we don't free and allocate the device
723 * structure on every command.
724 */
725 dev = ahc_linux_get_device(ahc, device->channel,
726 device->id, device->lun,
727 /*alloc*/TRUE);
728 if (dev != NULL) {
729 dev->flags &= ~AHC_DEV_UNCONFIGURED;
730 dev->scsi_device = device;
731 ahc_linux_device_queue_depth(ahc, dev);
732 }
cb624029 733
734 /* Initial Domain Validation */
735 if (!spi_initial_dv(device->sdev_target))
736 spi_dv_device(device);
737
1da177e4
LT		 738 return (0);
739}
740
741static void
013791ee 742ahc_linux_slave_destroy(struct scsi_device *device)
1da177e4
LT		 743{
744 struct ahc_softc *ahc;
745 struct ahc_linux_device *dev;
1da177e4
LT		 746
747 ahc = *((struct ahc_softc **)device->host->hostdata);
748 if (bootverbose)
749 printf("%s: Slave Destroy %d\n", ahc_name(ahc), device->id);
1da177e4
LT		 750 dev = ahc_linux_get_device(ahc, device->channel,
751 device->id, device->lun,
752 /*alloc*/FALSE);
753 /*
754 * Filter out "silly" deletions of real devices by only
755 * deleting devices that have had slave_configure()
756 * called on them. All other devices that have not
757 * been configured will automatically be deleted by
758 * the refcounting process.
759 */
760 if (dev != NULL
761 && (dev->flags & AHC_DEV_SLAVE_CONFIGURED) != 0) {
762 dev->flags |= AHC_DEV_UNCONFIGURED;
e4e360c3 763 if (dev->active == 0
1da177e4
LT		 764 && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
765 ahc_linux_free_device(ahc, dev);
766 }
1da177e4 767}
1da177e4
LT		 768
769#if defined(__i386__)
770/*
771 * Return the disk geometry for the given SCSI device.
772 */
773static int
1da177e4
LT		 774ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
775 sector_t capacity, int geom[])
776{
777 uint8_t *bh;
1da177e4
LT		 778 int heads;
779 int sectors;
780 int cylinders;
781 int ret;
782 int extended;
783 struct ahc_softc *ahc;
784 u_int channel;
785
786 ahc = *((struct ahc_softc **)sdev->host->hostdata);
787 channel = sdev->channel;
788
1da177e4 789 bh = scsi_bios_ptable(bdev);
1da177e4
LT		 790 if (bh) {
791 ret = scsi_partsize(bh, capacity,
792 &geom[2], &geom[0], &geom[1]);
1da177e4 793 kfree(bh);
1da177e4
LT		 794 if (ret != -1)
795 return (ret);
796 }
797 heads = 64;
798 sectors = 32;
799 cylinders = aic_sector_div(capacity, heads, sectors);
800
801 if (aic7xxx_extended != 0)
802 extended = 1;
803 else if (channel == 0)
804 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
805 else
806 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
807 if (extended && cylinders >= 1024) {
808 heads = 255;
809 sectors = 63;
810 cylinders = aic_sector_div(capacity, heads, sectors);
811 }
812 geom[0] = heads;
813 geom[1] = sectors;
814 geom[2] = cylinders;
815 return (0);
816}
817#endif
818
819/*
820 * Abort the current SCSI command(s).
821 */
822static int
013791ee 823ahc_linux_abort(struct scsi_cmnd *cmd)
1da177e4
LT		 824{
825 int error;
826
827 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
828 if (error != 0)
829 printf("aic7xxx_abort returns 0x%x\n", error);
830 return (error);
831}
832
833/*
834 * Attempt to send a target reset message to the device that timed out.
835 */
836static int
013791ee 837ahc_linux_dev_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 838{
839 int error;
840
841 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
842 if (error != 0)
843 printf("aic7xxx_dev_reset returns 0x%x\n", error);
844 return (error);
845}
846
847/*
848 * Reset the SCSI bus.
849 */
850static int
013791ee 851ahc_linux_bus_reset(struct scsi_cmnd *cmd)
1da177e4
LT		 852{
853 struct ahc_softc *ahc;
1da177e4
LT		 854 int found;
855
856 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
1da177e4
LT		 857 found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
858 /*initiate reset*/TRUE);
859 ahc_linux_run_complete_queue(ahc);
1da177e4
LT		 860
861 if (bootverbose)
862 printf("%s: SCSI bus reset delivered. "
863 "%d SCBs aborted.\n", ahc_name(ahc), found);
864
865 return SUCCESS;
866}
867
013791ee 868struct scsi_host_template aic7xxx_driver_template = {
1da177e4
LT		 869 .module = THIS_MODULE,
870 .name = "aic7xxx",
871 .proc_info = ahc_linux_proc_info,
872 .info = ahc_linux_info,
873 .queuecommand = ahc_linux_queue,
874 .eh_abort_handler = ahc_linux_abort,
875 .eh_device_reset_handler = ahc_linux_dev_reset,
876 .eh_bus_reset_handler = ahc_linux_bus_reset,
877#if defined(__i386__)
878 .bios_param = ahc_linux_biosparam,
879#endif
880 .can_queue = AHC_MAX_QUEUE,
881 .this_id = -1,
882 .cmd_per_lun = 2,
883 .use_clustering = ENABLE_CLUSTERING,
884 .slave_alloc = ahc_linux_slave_alloc,
885 .slave_configure = ahc_linux_slave_configure,
886 .slave_destroy = ahc_linux_slave_destroy,
887};
888
889/**************************** Tasklet Handler *********************************/
890
1da177e4
LT		 891/******************************** Macros **************************************/
892#define BUILD_SCSIID(ahc, cmd) \
893 ((((cmd)->device->id << TID_SHIFT) & TID) \
894 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
895 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
896
897/******************************** Bus DMA *************************************/
898int
899ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
900 bus_size_t alignment, bus_size_t boundary,
901 dma_addr_t lowaddr, dma_addr_t highaddr,
902 bus_dma_filter_t *filter, void *filterarg,
903 bus_size_t maxsize, int nsegments,
904 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
905{
906 bus_dma_tag_t dmat;
907
908 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
909 if (dmat == NULL)
910 return (ENOMEM);
911
912 /*
913 * Linux is very simplistic about DMA memory. For now don't
914 * maintain all specification information. Once Linux supplies
915 * better facilities for doing these operations, or the
916 * needs of this particular driver change, we might need to do
917 * more here.
918 */
919 dmat->alignment = alignment;
920 dmat->boundary = boundary;
921 dmat->maxsize = maxsize;
922 *ret_tag = dmat;
923 return (0);
924}
925
926void
927ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
928{
929 free(dmat, M_DEVBUF);
930}
931
932int
933ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
934 int flags, bus_dmamap_t *mapp)
935{
1da177e4 936 *vaddr = pci_alloc_consistent(ahc->dev_softc,
7dfa0f26 937 dmat->maxsize, mapp);
1da177e4 938 if (*vaddr == NULL)
7dfa0f26
CH		 939 return ENOMEM;
940 return 0;
1da177e4
LT		 941}
942
943void
944ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
945 void* vaddr, bus_dmamap_t map)
946{
947 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
7dfa0f26 948 vaddr, map);
1da177e4
LT		 949}
950
951int
952ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
953 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
954 void *cb_arg, int flags)
955{
956 /*
957 * Assume for now that this will only be used during
958 * initialization and not for per-transaction buffer mapping.
959 */
960 bus_dma_segment_t stack_sg;
961
7dfa0f26 962 stack_sg.ds_addr = map;
1da177e4
LT		 963 stack_sg.ds_len = dmat->maxsize;
964 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
965 return (0);
966}
967
968void
969ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
970{
1da177e4
LT		 971}
972
973int
974ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
975{
976 /* Nothing to do */
977 return (0);
978}
979
980/********************* Platform Dependent Functions ***************************/
981/*
982 * Compare "left hand" softc with "right hand" softc, returning:
983 * < 0 - lahc has a lower priority than rahc
984 * 0 - Softcs are equal
985 * > 0 - lahc has a higher priority than rahc
986 */
987int
988ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
989{
990 int value;
991 int rvalue;
992 int lvalue;
993
994 /*
995 * Under Linux, cards are ordered as follows:
996 * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
997 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
998 * 3) All remaining VLB/EISA devices sorted by ioport.
999 * 4) All remaining PCI devices sorted by bus/slot/func.
1000 */
1001 value = (lahc->flags & AHC_BIOS_ENABLED)
1002 - (rahc->flags & AHC_BIOS_ENABLED);
1003 if (value != 0)
1004 /* Controllers with BIOS enabled have a *higher* priority */
1005 return (value);
1006
1007 /*
1008 * Same BIOS setting, now sort based on bus type.
1009 * EISA and VL controllers sort together. EISA/VL
1010 * have higher priority than PCI.
1011 */
1012 rvalue = (rahc->chip & AHC_BUS_MASK);
1013 if (rvalue == AHC_VL)
1014 rvalue = AHC_EISA;
1015 lvalue = (lahc->chip & AHC_BUS_MASK);
1016 if (lvalue == AHC_VL)
1017 lvalue = AHC_EISA;
1018 value = rvalue - lvalue;
1019 if (value != 0)
1020 return (value);
1021
1022 /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
1023 switch (rvalue) {
1024#ifdef CONFIG_PCI
1025 case AHC_PCI:
1026 {
1027 char primary_channel;
1028
1029 if (aic7xxx_reverse_scan != 0)
1030 value = ahc_get_pci_bus(lahc->dev_softc)
1031 - ahc_get_pci_bus(rahc->dev_softc);
1032 else
1033 value = ahc_get_pci_bus(rahc->dev_softc)
1034 - ahc_get_pci_bus(lahc->dev_softc);
1035 if (value != 0)
1036 break;
1037 if (aic7xxx_reverse_scan != 0)
1038 value = ahc_get_pci_slot(lahc->dev_softc)
1039 - ahc_get_pci_slot(rahc->dev_softc);
1040 else
1041 value = ahc_get_pci_slot(rahc->dev_softc)
1042 - ahc_get_pci_slot(lahc->dev_softc);
1043 if (value != 0)
1044 break;
1045 /*
1046 * On multi-function devices, the user can choose
1047 * to have function 1 probed before function 0.
1048 * Give whichever channel is the primary channel
1049 * the highest priority.
1050 */
1051 primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
1052 value = -1;
1053 if (lahc->channel == primary_channel)
1054 value = 1;
1055 break;
1056 }
1057#endif
1058 case AHC_EISA:
1059 if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
1060 value = rahc->platform_data->bios_address
1061 - lahc->platform_data->bios_address;
1062 } else {
1063 value = rahc->bsh.ioport
1064 - lahc->bsh.ioport;
1065 }
1066 break;
1067 default:
1068 panic("ahc_softc_sort: invalid bus type");
1069 }
1070 return (value);
1071}
1072
1073static void
1074ahc_linux_setup_tag_info_global(char *p)
1075{
1076 int tags, i, j;
1077
1078 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1079 printf("Setting Global Tags= %d\n", tags);
1080
1081 for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
1082 for (j = 0; j < AHC_NUM_TARGETS; j++) {
1083 aic7xxx_tag_info[i].tag_commands[j] = tags;
1084 }
1085 }
1086}
1087
1088static void
1089ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1090{
1091
1092 if ((instance >= 0) && (targ >= 0)
1093 && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
1094 && (targ < AHC_NUM_TARGETS)) {
1095 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
1096 if (bootverbose)
1097 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1098 }
1099}
1100
1da177e4
LT		 1101/*
1102 * Handle Linux boot parameters. This routine allows for assigning a value
1103 * to a parameter with a ':' between the parameter and the value.
1104 * ie. aic7xxx=stpwlev:1,extended
1105 */
1106static int
1107aic7xxx_setup(char *s)
1108{
1109 int i, n;
1110 char *p;
1111 char *end;
1112
1113 static struct {
1114 const char *name;
1115 uint32_t *flag;
1116 } options[] = {
1117 { "extended", &aic7xxx_extended },
1118 { "no_reset", &aic7xxx_no_reset },
1119 { "verbose", &aic7xxx_verbose },
1120 { "allow_memio", &aic7xxx_allow_memio},
1121#ifdef AHC_DEBUG
1122 { "debug", &ahc_debug },
1123#endif
1124 { "reverse_scan", &aic7xxx_reverse_scan },
1125 { "no_probe", &aic7xxx_probe_eisa_vl },
1126 { "probe_eisa_vl", &aic7xxx_probe_eisa_vl },
1127 { "periodic_otag", &aic7xxx_periodic_otag },
1128 { "pci_parity", &aic7xxx_pci_parity },
1129 { "seltime", &aic7xxx_seltime },
1130 { "tag_info", NULL },
1131 { "global_tag_depth", NULL },
1132 { "dv", NULL }
1133 };
1134
1135 end = strchr(s, '\0');
1136
1137 /*
1138 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1139 * will never be 0 in this case.
1140 */
1141 n = 0;
1142
1143 while ((p = strsep(&s, ",.")) != NULL) {
1144 if (*p == '\0')
1145 continue;
1146 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1147
1148 n = strlen(options[i].name);
1149 if (strncmp(options[i].name, p, n) == 0)
1150 break;
1151 }
1152 if (i == NUM_ELEMENTS(options))
1153 continue;
1154
1155 if (strncmp(p, "global_tag_depth", n) == 0) {
1156 ahc_linux_setup_tag_info_global(p + n);
1157 } else if (strncmp(p, "tag_info", n) == 0) {
1158 s = aic_parse_brace_option("tag_info", p + n, end,
1159 2, ahc_linux_setup_tag_info, 0);
1da177e4
LT		 1160 } else if (p[n] == ':') {
1161 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1162 } else if (strncmp(p, "verbose", n) == 0) {
1163 *(options[i].flag) = 1;
1164 } else {
1165 *(options[i].flag) ^= 0xFFFFFFFF;
1166 }
1167 }
1168 return 1;
1169}
1170
1171__setup("aic7xxx=", aic7xxx_setup);
1172
1173uint32_t aic7xxx_verbose;
1174
1175int
013791ee 1176ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1da177e4
LT		 1177{
1178 char buf[80];
1179 struct Scsi_Host *host;
1180 char *new_name;
1181 u_long s;
1da177e4
LT		 1182
1183 template->name = ahc->description;
1184 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1185 if (host == NULL)
1186 return (ENOMEM);
1187
1188 *((struct ahc_softc **)host->hostdata) = ahc;
1189 ahc_lock(ahc, &s);
1da177e4 1190 scsi_assign_lock(host, &ahc->platform_data->spin_lock);
1da177e4
LT		 1191 ahc->platform_data->host = host;
1192 host->can_queue = AHC_MAX_QUEUE;
1193 host->cmd_per_lun = 2;
1194 /* XXX No way to communicate the ID for multiple channels */
1195 host->this_id = ahc->our_id;
1196 host->irq = ahc->platform_data->irq;
1197 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1198 host->max_lun = AHC_NUM_LUNS;
1199 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1200 host->sg_tablesize = AHC_NSEG;
1201 ahc_set_unit(ahc, ahc_linux_next_unit());
1202 sprintf(buf, "scsi%d", host->host_no);
1203 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1204 if (new_name != NULL) {
1205 strcpy(new_name, buf);
1206 ahc_set_name(ahc, new_name);
1207 }
1208 host->unique_id = ahc->unit;
1da177e4 1209 ahc_linux_initialize_scsi_bus(ahc);
1da177e4 1210 ahc_intr_enable(ahc, TRUE);
1da177e4
LT		 1211 ahc_unlock(ahc, &s);
1212
92d161c3 1213 host->transportt = ahc_linux_transport_template;
1214
1da177e4
LT		 1215 scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
1216 scsi_scan_host(host);
1da177e4
LT		 1217 return (0);
1218}
1219
1220uint64_t
1221ahc_linux_get_memsize(void)
1222{
1223 struct sysinfo si;
1224
1225 si_meminfo(&si);
1226 return ((uint64_t)si.totalram << PAGE_SHIFT);
1227}
1228
1229/*
1230 * Find the smallest available unit number to use
1231 * for a new device. We don't just use a static
1232 * count to handle the "repeated hot-(un)plug"
1233 * scenario.
1234 */
1235static int
1236ahc_linux_next_unit(void)
1237{
1238 struct ahc_softc *ahc;
1239 int unit;
1240
1241 unit = 0;
1242retry:
1243 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
1244 if (ahc->unit == unit) {
1245 unit++;
1246 goto retry;
1247 }
1248 }
1249 return (unit);
1250}
1251
1252/*
1253 * Place the SCSI bus into a known state by either resetting it,
1254 * or forcing transfer negotiations on the next command to any
1255 * target.
1256 */
1257void
1258ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1259{
1260 int i;
1261 int numtarg;
1262
1263 i = 0;
1264 numtarg = 0;
1265
1266 if (aic7xxx_no_reset != 0)
1267 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1268
1269 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1270 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1271 else
1272 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1273
1274 if ((ahc->features & AHC_TWIN) != 0) {
1275
1276 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1277 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1278 } else {
1279 if (numtarg == 0)
1280 i = 8;
1281 numtarg += 8;
1282 }
1283 }
1284
1285 /*
1286 * Force negotiation to async for all targets that
1287 * will not see an initial bus reset.
1288 */
1289 for (; i < numtarg; i++) {
1290 struct ahc_devinfo devinfo;
1291 struct ahc_initiator_tinfo *tinfo;
1292 struct ahc_tmode_tstate *tstate;
1293 u_int our_id;
1294 u_int target_id;
1295 char channel;
1296
1297 channel = 'A';
1298 our_id = ahc->our_id;
1299 target_id = i;
1300 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1301 channel = 'B';
1302 our_id = ahc->our_id_b;
1303 target_id = i % 8;
1304 }
1305 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1306 target_id, &tstate);
1307 ahc_compile_devinfo(&devinfo, our_id, target_id,
1308 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1309 ahc_update_neg_request(ahc, &devinfo, tstate,
1310 tinfo, AHC_NEG_ALWAYS);
1311 }
1312 /* Give the bus some time to recover */
1313 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1314 ahc_linux_freeze_simq(ahc);
1315 init_timer(&ahc->platform_data->reset_timer);
1316 ahc->platform_data->reset_timer.data = (u_long)ahc;
1317 ahc->platform_data->reset_timer.expires =
1318 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
1319 ahc->platform_data->reset_timer.function =
1320 ahc_linux_release_simq;
1321 add_timer(&ahc->platform_data->reset_timer);
1322 }
1323}
1324
1325int
1326ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1327{
1328
1329 ahc->platform_data =
1330 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1331 if (ahc->platform_data == NULL)
1332 return (ENOMEM);
1333 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1334 TAILQ_INIT(&ahc->platform_data->completeq);
1da177e4 1335 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1da177e4 1336 ahc_lockinit(ahc);
1da177e4
LT		 1337 init_timer(&ahc->platform_data->completeq_timer);
1338 ahc->platform_data->completeq_timer.data = (u_long)ahc;
1339 ahc->platform_data->completeq_timer.function =
1340 (ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue;
1341 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
1da177e4
LT		 1342 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1343 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1344 if (aic7xxx_pci_parity == 0)
1345 ahc->flags |= AHC_DISABLE_PCI_PERR;
1346
1347 return (0);
1348}
1349
1350void
1351ahc_platform_free(struct ahc_softc *ahc)
1352{
1353 struct ahc_linux_target *targ;
1354 struct ahc_linux_device *dev;
1355 int i, j;
1356
1357 if (ahc->platform_data != NULL) {
1358 del_timer_sync(&ahc->platform_data->completeq_timer);
1da177e4 1359 if (ahc->platform_data->host != NULL) {
1da177e4 1360 scsi_remove_host(ahc->platform_data->host);
1da177e4
LT		 1361 scsi_host_put(ahc->platform_data->host);
1362 }
1363
1364 /* destroy all of the device and target objects */
1365 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1366 targ = ahc->platform_data->targets[i];
1367 if (targ != NULL) {
1368 /* Keep target around through the loop. */
1369 targ->refcount++;
1370 for (j = 0; j < AHC_NUM_LUNS; j++) {
1371
1372 if (targ->devices[j] == NULL)
1373 continue;
1374 dev = targ->devices[j];
1375 ahc_linux_free_device(ahc, dev);
1376 }
1377 /*
1378 * Forcibly free the target now that
1379 * all devices are gone.
1380 */
1381 ahc_linux_free_target(ahc, targ);
1382 }
1383 }
1384
1385 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1386 free_irq(ahc->platform_data->irq, ahc);
1387 if (ahc->tag == BUS_SPACE_PIO
1388 && ahc->bsh.ioport != 0)
1389 release_region(ahc->bsh.ioport, 256);
1390 if (ahc->tag == BUS_SPACE_MEMIO
1391 && ahc->bsh.maddr != NULL) {
1392 iounmap(ahc->bsh.maddr);
1393 release_mem_region(ahc->platform_data->mem_busaddr,
1394 0x1000);
1395 }
dedd8310 1396
1da177e4
LT		 1397 free(ahc->platform_data, M_DEVBUF);
1398 }
1399}
1400
1401void
1402ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1403{
1404 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1405 SCB_GET_CHANNEL(ahc, scb),
1406 SCB_GET_LUN(scb), SCB_LIST_NULL,
1407 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1408}
1409
1410void
1411ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1412 ahc_queue_alg alg)
1413{
1414 struct ahc_linux_device *dev;
1415 int was_queuing;
1416 int now_queuing;
1417
1418 dev = ahc_linux_get_device(ahc, devinfo->channel - 'A',
1419 devinfo->target,
1420 devinfo->lun, /*alloc*/FALSE);
1421 if (dev == NULL)
1422 return;
1423 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1424 switch (alg) {
1425 default:
1426 case AHC_QUEUE_NONE:
1427 now_queuing = 0;
1428 break;
1429 case AHC_QUEUE_BASIC:
1430 now_queuing = AHC_DEV_Q_BASIC;
1431 break;
1432 case AHC_QUEUE_TAGGED:
1433 now_queuing = AHC_DEV_Q_TAGGED;
1434 break;
1435 }
1436 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1437 && (was_queuing != now_queuing)
1438 && (dev->active != 0)) {
1439 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1440 dev->qfrozen++;
1441 }
1442
1443 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1444 if (now_queuing) {
1445 u_int usertags;
1446
1447 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1448 if (!was_queuing) {
1449 /*
1450 * Start out agressively and allow our
1451 * dynamic queue depth algorithm to take
1452 * care of the rest.
1453 */
1454 dev->maxtags = usertags;
1455 dev->openings = dev->maxtags - dev->active;
1456 }
1457 if (dev->maxtags == 0) {
1458 /*
1459 * Queueing is disabled by the user.
1460 */
1461 dev->openings = 1;
1462 } else if (alg == AHC_QUEUE_TAGGED) {
1463 dev->flags |= AHC_DEV_Q_TAGGED;
1464 if (aic7xxx_periodic_otag != 0)
1465 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1466 } else
1467 dev->flags |= AHC_DEV_Q_BASIC;
1468 } else {
1469 /* We can only have one opening. */
1470 dev->maxtags = 0;
1471 dev->openings = 1 - dev->active;
1472 }
1da177e4
LT		 1473 if (dev->scsi_device != NULL) {
1474 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1475 case AHC_DEV_Q_BASIC:
1476 scsi_adjust_queue_depth(dev->scsi_device,
1477 MSG_SIMPLE_TASK,
1478 dev->openings + dev->active);
1479 break;
1480 case AHC_DEV_Q_TAGGED:
1481 scsi_adjust_queue_depth(dev->scsi_device,
1482 MSG_ORDERED_TASK,
1483 dev->openings + dev->active);
1484 break;
1485 default:
1486 /*
1487 * We allow the OS to queue 2 untagged transactions to
1488 * us at any time even though we can only execute them
1489 * serially on the controller/device. This should
1490 * remove some latency.
1491 */
1492 scsi_adjust_queue_depth(dev->scsi_device,
1493 /*NON-TAGGED*/0,
1494 /*queue depth*/2);
1495 break;
1496 }
1497 }
1da177e4
LT		 1498}
1499
1500int
1501ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1502 int lun, u_int tag, role_t role, uint32_t status)
1503{
e4e360c3 1504 return 0;
1da177e4
LT		 1505}
1506
1507static void
1508ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc)
1509{
1510 u_long flags;
1511
1512 ahc_lock(ahc, &flags);
1513 del_timer(&ahc->platform_data->completeq_timer);
1514 ahc->platform_data->flags &= ~AHC_RUN_CMPLT_Q_TIMER;
1515 ahc_linux_run_complete_queue(ahc);
1516 ahc_unlock(ahc, &flags);
1517}
1518
cb624029 1519static u_int
1520ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1da177e4 1521{
cb624029 1522 static int warned_user;
1523 u_int tags;
1da177e4 1524
cb624029 1525 tags = 0;
1526 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1527 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
1528 if (warned_user == 0) {
1da177e4 1529
cb624029 1530 printf(KERN_WARNING
1531"aic7xxx: WARNING: Insufficient tag_info instances\n"
1532"aic7xxx: for installed controllers. Using defaults\n"
1533"aic7xxx: Please update the aic7xxx_tag_info array in\n"
1534"aic7xxx: the aic7xxx_osm..c source file.\n");
1535 warned_user++;
1536 }
1537 tags = AHC_MAX_QUEUE;
1538 } else {
1539 adapter_tag_info_t *tag_info;
1da177e4 1540
cb624029 1541 tag_info = &aic7xxx_tag_info[ahc->unit];
1542 tags = tag_info->tag_commands[devinfo->target_offset];
1543 if (tags > AHC_MAX_QUEUE)
1544 tags = AHC_MAX_QUEUE;
1545 }
1da177e4 1546 }
cb624029 1547 return (tags);
1da177e4
LT		 1548}
1549
cb624029 1550/*
1551 * Determines the queue depth for a given device.
1552 */
1da177e4 1553static void
cb624029 1554ahc_linux_device_queue_depth(struct ahc_softc *ahc,
1555 struct ahc_linux_device *dev)
1da177e4 1556{
cb624029 1557 struct ahc_devinfo devinfo;
1558 u_int tags;
1da177e4 1559
cb624029 1560 ahc_compile_devinfo(&devinfo,
1561 dev->target->channel == 0
1562 ? ahc->our_id : ahc->our_id_b,
1563 dev->target->target, dev->lun,
1564 dev->target->channel == 0 ? 'A' : 'B',
1565 ROLE_INITIATOR);
1566 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1567 if (tags != 0
1568 && dev->scsi_device != NULL
1569 && dev->scsi_device->tagged_supported != 0) {
1da177e4 1570
cb624029 1571 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
1572 ahc_print_devinfo(ahc, &devinfo);
1573 printf("Tagged Queuing enabled. Depth %d\n", tags);
1da177e4 1574 } else {
cb624029 1575 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
1da177e4
LT		 1576 }
1577}
1578
e4e360c3
JB		 1579static int
1580ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1581 struct scsi_cmnd *cmd)
1da177e4 1582{
cb624029 1583 struct scb *scb;
1584 struct hardware_scb *hscb;
1585 struct ahc_initiator_tinfo *tinfo;
1586 struct ahc_tmode_tstate *tstate;
1587 uint16_t mask;
e4e360c3 1588 struct scb_tailq *untagged_q = NULL;
1da177e4 1589
e4e360c3
JB		 1590 /*
1591 * Schedule us to run later. The only reason we are not
1592 * running is because the whole controller Q is frozen.
1593 */
1594 if (ahc->platform_data->qfrozen != 0)
1595 return SCSI_MLQUEUE_HOST_BUSY;
1da177e4 1596
e4e360c3
JB		 1597 /*
1598 * We only allow one untagged transaction
1599 * per target in the initiator role unless
1600 * we are storing a full busy target *lun*
1601 * table in SCB space.
1602 */
1603 if (!blk_rq_tagged(cmd->request)
1604 && (ahc->features & AHC_SCB_BTT) == 0) {
1605 int target_offset;
1da177e4 1606
e4e360c3
JB		 1607 target_offset = cmd->device->id + cmd->device->channel * 8;
1608 untagged_q = &(ahc->untagged_queues[target_offset]);
1609 if (!TAILQ_EMPTY(untagged_q))
1610 /* if we're already executing an untagged command
1611 * we're busy to another */
1612 return SCSI_MLQUEUE_DEVICE_BUSY;
1613 }
1614
1615 /*
1616 * Get an scb to use.
1617 */
1618 if ((scb = ahc_get_scb(ahc)) == NULL) {
cb624029 1619 ahc->flags |= AHC_RESOURCE_SHORTAGE;
e4e360c3
JB		 1620 return SCSI_MLQUEUE_HOST_BUSY;
1621 }
1da177e4 1622
e4e360c3
JB		 1623 scb->io_ctx = cmd;
1624 scb->platform_data->dev = dev;
1625 hscb = scb->hscb;
1626 cmd->host_scribble = (char *)scb;
1da177e4 1627
e4e360c3
JB		 1628 /*
1629 * Fill out basics of the HSCB.
1630 */
1631 hscb->control = 0;
1632 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1633 hscb->lun = cmd->device->lun;
1634 mask = SCB_GET_TARGET_MASK(ahc, scb);
1635 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1636 SCB_GET_OUR_ID(scb),
1637 SCB_GET_TARGET(ahc, scb), &tstate);
1638 hscb->scsirate = tinfo->scsirate;
1639 hscb->scsioffset = tinfo->curr.offset;
1640 if ((tstate->ultraenb & mask) != 0)
1641 hscb->control |= ULTRAENB;
1642
1643 if ((ahc->user_discenable & mask) != 0)
1644 hscb->control |= DISCENB;
1645
1646 if ((tstate->auto_negotiate & mask) != 0) {
1647 scb->flags |= SCB_AUTO_NEGOTIATE;
1648 scb->hscb->control |= MK_MESSAGE;
1649 }
1650
1651 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
e4e360c3
JB		 1652 int msg_bytes;
1653 uint8_t tag_msgs[2];
1654
1655 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1656 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1657 hscb->control |= tag_msgs[0];
1658 if (tag_msgs[0] == MSG_ORDERED_TASK)
cb624029 1659 dev->commands_since_idle_or_otag = 0;
dedd8310
CH		 1660 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1661 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
e4e360c3
JB		 1662 hscb->control |= MSG_ORDERED_TASK;
1663 dev->commands_since_idle_or_otag = 0;
cb624029 1664 } else {
e4e360c3 1665 hscb->control |= MSG_SIMPLE_TASK;
cb624029 1666 }
e4e360c3 1667 }
1da177e4 1668
e4e360c3
JB		 1669 hscb->cdb_len = cmd->cmd_len;
1670 if (hscb->cdb_len <= 12) {
1671 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1672 } else {
1673 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1674 scb->flags |= SCB_CDB32_PTR;
1675 }
1da177e4 1676
e4e360c3
JB		 1677 scb->platform_data->xfer_len = 0;
1678 ahc_set_residual(scb, 0);
1679 ahc_set_sense_residual(scb, 0);
1680 scb->sg_count = 0;
1681 if (cmd->use_sg != 0) {
1682 struct ahc_dma_seg *sg;
1683 struct scatterlist *cur_seg;
1684 struct scatterlist *end_seg;
1685 int nseg;
1686
1687 cur_seg = (struct scatterlist *)cmd->request_buffer;
1688 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
1689 cmd->sc_data_direction);
1690 end_seg = cur_seg + nseg;
1691 /* Copy the segments into the SG list. */
1692 sg = scb->sg_list;
1693 /*
1694 * The sg_count may be larger than nseg if
1695 * a transfer crosses a 32bit page.
1696 */
1697 while (cur_seg < end_seg) {
1da177e4 1698 dma_addr_t addr;
e4e360c3
JB		 1699 bus_size_t len;
1700 int consumed;
1701
1702 addr = sg_dma_address(cur_seg);
1703 len = sg_dma_len(cur_seg);
1704 consumed = ahc_linux_map_seg(ahc, scb,
1705 sg, addr, len);
1706 sg += consumed;
1707 scb->sg_count += consumed;
1708 cur_seg++;
1da177e4 1709 }
e4e360c3
JB		 1710 sg--;
1711 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4 1712
e4e360c3
JB		 1713 /*
1714 * Reset the sg list pointer.
1715 */
1716 scb->hscb->sgptr =
1717 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1718
1719 /*
1720 * Copy the first SG into the "current"
1721 * data pointer area.
1722 */
1723 scb->hscb->dataptr = scb->sg_list->addr;
1724 scb->hscb->datacnt = scb->sg_list->len;
1725 } else if (cmd->request_bufflen != 0) {
1726 struct ahc_dma_seg *sg;
1727 dma_addr_t addr;
1728
1729 sg = scb->sg_list;
1730 addr = pci_map_single(ahc->dev_softc,
1731 cmd->request_buffer,
1732 cmd->request_bufflen,
1733 cmd->sc_data_direction);
1734 scb->platform_data->buf_busaddr = addr;
1735 scb->sg_count = ahc_linux_map_seg(ahc, scb,
1736 sg, addr,
1737 cmd->request_bufflen);
1738 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1da177e4
LT		 1739
1740 /*
e4e360c3 1741 * Reset the sg list pointer.
1da177e4 1742 */
e4e360c3
JB		 1743 scb->hscb->sgptr =
1744 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1745
1746 /*
1747 * Copy the first SG into the "current"
1748 * data pointer area.
1749 */
1750 scb->hscb->dataptr = sg->addr;
1751 scb->hscb->datacnt = sg->len;
1752 } else {
1753 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1754 scb->hscb->dataptr = 0;
1755 scb->hscb->datacnt = 0;
1756 scb->sg_count = 0;
1757 }
1758
1759 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1760 dev->openings--;
1761 dev->active++;
1762 dev->commands_issued++;
1763 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1764 dev->commands_since_idle_or_otag++;
1765
1766 scb->flags |= SCB_ACTIVE;
1767 if (untagged_q) {
1768 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1769 scb->flags |= SCB_UNTAGGEDQ;
1da177e4 1770 }
e4e360c3
JB		 1771 ahc_queue_scb(ahc, scb);
1772 return 0;
1da177e4
LT		 1773}
1774
1775/*
1776 * SCSI controller interrupt handler.
1777 */
1778irqreturn_t
1779ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1780{
1781 struct ahc_softc *ahc;
1782 u_long flags;
1783 int ours;
1784
1785 ahc = (struct ahc_softc *) dev_id;
1786 ahc_lock(ahc, &flags);
1787 ours = ahc_intr(ahc);
1da177e4
LT		 1788 ahc_linux_run_complete_queue(ahc);
1789 ahc_unlock(ahc, &flags);
1790 return IRQ_RETVAL(ours);
1791}
1792
1793void
1794ahc_platform_flushwork(struct ahc_softc *ahc)
1795{
1796
1797 while (ahc_linux_run_complete_queue(ahc) != NULL)
1798 ;
1799}
1800
1801static struct ahc_linux_target*
1802ahc_linux_alloc_target(struct ahc_softc *ahc, u_int channel, u_int target)
1803{
1804 struct ahc_linux_target *targ;
1805 u_int target_offset;
1806
1807 target_offset = target;
1808 if (channel != 0)
1809 target_offset += 8;
1810
1811 targ = malloc(sizeof(*targ), M_DEVBUG, M_NOWAIT);
1812 if (targ == NULL)
1813 return (NULL);
1814 memset(targ, 0, sizeof(*targ));
1815 targ->channel = channel;
1816 targ->target = target;
1817 targ->ahc = ahc;
1da177e4
LT		 1818 ahc->platform_data->targets[target_offset] = targ;
1819 return (targ);
1820}
1821
1822static void
1823ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ)
1824{
1825 struct ahc_devinfo devinfo;
1826 struct ahc_initiator_tinfo *tinfo;
1827 struct ahc_tmode_tstate *tstate;
1828 u_int our_id;
1829 u_int target_offset;
1830 char channel;
1831
1832 /*
1833 * Force a negotiation to async/narrow on any
1834 * future command to this device unless a bus
1835 * reset occurs between now and that command.
1836 */
1837 channel = 'A' + targ->channel;
1838 our_id = ahc->our_id;
1839 target_offset = targ->target;
1840 if (targ->channel != 0) {
1841 target_offset += 8;
1842 our_id = ahc->our_id_b;
1843 }
1844 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1845 targ->target, &tstate);
1846 ahc_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD,
1847 channel, ROLE_INITIATOR);
1848 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
1849 AHC_TRANS_GOAL, /*paused*/FALSE);
1850 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
1851 AHC_TRANS_GOAL, /*paused*/FALSE);
1852 ahc_update_neg_request(ahc, &devinfo, tstate, tinfo, AHC_NEG_ALWAYS);
1853 ahc->platform_data->targets[target_offset] = NULL;
1da177e4
LT		 1854 free(targ, M_DEVBUF);
1855}
1856
1857static struct ahc_linux_device*
1858ahc_linux_alloc_device(struct ahc_softc *ahc,
1859 struct ahc_linux_target *targ, u_int lun)
1860{
1861 struct ahc_linux_device *dev;
1862
1863 dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
1864 if (dev == NULL)
1865 return (NULL);
1866 memset(dev, 0, sizeof(*dev));
1867 init_timer(&dev->timer);
1da177e4
LT		 1868 dev->flags = AHC_DEV_UNCONFIGURED;
1869 dev->lun = lun;
1870 dev->target = targ;
1871
1872 /*
1873 * We start out life using untagged
1874 * transactions of which we allow one.
1875 */
1876 dev->openings = 1;
1877
1878 /*
1879 * Set maxtags to 0. This will be changed if we
1880 * later determine that we are dealing with
1881 * a tagged queuing capable device.
1882 */
1883 dev->maxtags = 0;
1884
1885 targ->refcount++;
1886 targ->devices[lun] = dev;
1887 return (dev);
1888}
1889
1890static void
1891__ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
1892{
1893 struct ahc_linux_target *targ;
1894
1895 targ = dev->target;
1896 targ->devices[dev->lun] = NULL;
1897 free(dev, M_DEVBUF);
1898 targ->refcount--;
cb624029 1899 if (targ->refcount == 0)
1da177e4
LT		 1900 ahc_linux_free_target(ahc, targ);
1901}
1902
1903static void
1904ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
1905{
1906 del_timer_sync(&dev->timer);
1907 __ahc_linux_free_device(ahc, dev);
1908}
1909
1910void
1911ahc_send_async(struct ahc_softc *ahc, char channel,
1912 u_int target, u_int lun, ac_code code, void *arg)
1913{
1914 switch (code) {
1915 case AC_TRANSFER_NEG:
1916 {
1917 char buf[80];
1918 struct ahc_linux_target *targ;
1919 struct info_str info;
1920 struct ahc_initiator_tinfo *tinfo;
1921 struct ahc_tmode_tstate *tstate;
1922 int target_offset;
1923
1924 info.buffer = buf;
1925 info.length = sizeof(buf);
1926 info.offset = 0;
1927 info.pos = 0;
1928 tinfo = ahc_fetch_transinfo(ahc, channel,
1929 channel == 'A' ? ahc->our_id
1930 : ahc->our_id_b,
1931 target, &tstate);
1932
1933 /*
1934 * Don't bother reporting results while
1935 * negotiations are still pending.
1936 */
1937 if (tinfo->curr.period != tinfo->goal.period
1938 || tinfo->curr.width != tinfo->goal.width
1939 || tinfo->curr.offset != tinfo->goal.offset
1940 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1941 if (bootverbose == 0)
1942 break;
1943
1944 /*
1945 * Don't bother reporting results that
1946 * are identical to those last reported.
1947 */
1948 target_offset = target;
1949 if (channel == 'B')
1950 target_offset += 8;
1951 targ = ahc->platform_data->targets[target_offset];
1952 if (targ == NULL)
1953 break;
1954 if (tinfo->curr.period == targ->last_tinfo.period
1955 && tinfo->curr.width == targ->last_tinfo.width
1956 && tinfo->curr.offset == targ->last_tinfo.offset
1957 && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
1958 if (bootverbose == 0)
1959 break;
1960
1961 targ->last_tinfo.period = tinfo->curr.period;
1962 targ->last_tinfo.width = tinfo->curr.width;
1963 targ->last_tinfo.offset = tinfo->curr.offset;
1964 targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
1965
1966 printf("(%s:%c:", ahc_name(ahc), channel);
1967 if (target == CAM_TARGET_WILDCARD)
1968 printf("*): ");
1969 else
1970 printf("%d): ", target);
1971 ahc_format_transinfo(&info, &tinfo->curr);
1972 if (info.pos < info.length)
1973 *info.buffer = '\0';
1974 else
1975 buf[info.length - 1] = '\0';
1976 printf("%s", buf);
1977 break;
1978 }
1979 case AC_SENT_BDR:
1980 {
1da177e4
LT		 1981 WARN_ON(lun != CAM_LUN_WILDCARD);
1982 scsi_report_device_reset(ahc->platform_data->host,
1983 channel - 'A', target);
1da177e4
LT		 1984 break;
1985 }
1986 case AC_BUS_RESET:
1987 if (ahc->platform_data->host != NULL) {
1988 scsi_report_bus_reset(ahc->platform_data->host,
1989 channel - 'A');
1990 }
1991 break;
1992 default:
1993 panic("ahc_send_async: Unexpected async event");
1994 }
1995}
1996
1997/*
1998 * Calls the higher level scsi done function and frees the scb.
1999 */
2000void
2001ahc_done(struct ahc_softc *ahc, struct scb *scb)
2002{
013791ee 2003 struct scsi_cmnd *cmd;
1da177e4
LT		 2004 struct ahc_linux_device *dev;
2005
2006 LIST_REMOVE(scb, pending_links);
2007 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
2008 struct scb_tailq *untagged_q;
2009 int target_offset;
2010
2011 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
2012 untagged_q = &(ahc->untagged_queues[target_offset]);
2013 TAILQ_REMOVE(untagged_q, scb, links.tqe);
e4e360c3 2014 BUG_ON(!TAILQ_EMPTY(untagged_q));
1da177e4
LT		 2015 }
2016
2017 if ((scb->flags & SCB_ACTIVE) == 0) {
2018 printf("SCB %d done'd twice\n", scb->hscb->tag);
2019 ahc_dump_card_state(ahc);
2020 panic("Stopping for safety");
2021 }
2022 cmd = scb->io_ctx;
2023 dev = scb->platform_data->dev;
2024 dev->active--;
2025 dev->openings++;
2026 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
2027 cmd->result &= ~(CAM_DEV_QFRZN << 16);
2028 dev->qfrozen--;
2029 }
2030 ahc_linux_unmap_scb(ahc, scb);
2031
2032 /*
2033 * Guard against stale sense data.
2034 * The Linux mid-layer assumes that sense
2035 * was retrieved anytime the first byte of
2036 * the sense buffer looks "sane".
2037 */
2038 cmd->sense_buffer[0] = 0;
2039 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
2040 uint32_t amount_xferred;
2041
2042 amount_xferred =
2043 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
2044 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
2045#ifdef AHC_DEBUG
2046 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
2047 ahc_print_path(ahc, scb);
2048 printf("Set CAM_UNCOR_PARITY\n");
2049 }
2050#endif
2051 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
2052#ifdef AHC_REPORT_UNDERFLOWS
2053 /*
2054 * This code is disabled by default as some
2055 * clients of the SCSI system do not properly
2056 * initialize the underflow parameter. This
2057 * results in spurious termination of commands
2058 * that complete as expected (e.g. underflow is
2059 * allowed as command can return variable amounts
2060 * of data.
2061 */
2062 } else if (amount_xferred < scb->io_ctx->underflow) {
2063 u_int i;
2064
2065 ahc_print_path(ahc, scb);
2066 printf("CDB:");
2067 for (i = 0; i < scb->io_ctx->cmd_len; i++)
2068 printf(" 0x%x", scb->io_ctx->cmnd[i]);
2069 printf("\n");
2070 ahc_print_path(ahc, scb);
2071 printf("Saw underflow (%ld of %ld bytes). "
2072 "Treated as error\n",
2073 ahc_get_residual(scb),
2074 ahc_get_transfer_length(scb));
2075 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
2076#endif
2077 } else {
2078 ahc_set_transaction_status(scb, CAM_REQ_CMP);
2079 }
2080 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
2081 ahc_linux_handle_scsi_status(ahc, dev, scb);
2082 } else if (ahc_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
2083 dev->flags |= AHC_DEV_UNCONFIGURED;
1da177e4 2084 }
1da177e4
LT		 2085
2086 if (dev->openings == 1
2087 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
2088 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
2089 dev->tag_success_count++;
2090 /*
2091 * Some devices deal with temporary internal resource
2092 * shortages by returning queue full. When the queue
2093 * full occurrs, we throttle back. Slowly try to get
2094 * back to our previous queue depth.
2095 */
2096 if ((dev->openings + dev->active) < dev->maxtags
2097 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
2098 dev->tag_success_count = 0;
2099 dev->openings++;
2100 }
2101
2102 if (dev->active == 0)
2103 dev->commands_since_idle_or_otag = 0;
2104
e4e360c3
JB		 2105 if ((dev->flags & AHC_DEV_UNCONFIGURED) != 0
2106 && dev->active == 0
2107 && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
2108 ahc_linux_free_device(ahc, dev);
1da177e4
LT		 2109
2110 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
2111 printf("Recovery SCB completes\n");
2112 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
2113 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
2114 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
2115 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2116 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2117 up(&ahc->platform_data->eh_sem);
2118 }
2119 }
2120
2121 ahc_free_scb(ahc, scb);
2122 ahc_linux_queue_cmd_complete(ahc, cmd);
1da177e4
LT		 2123}
2124
2125static void
2126ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
2127 struct ahc_linux_device *dev, struct scb *scb)
2128{
2129 struct ahc_devinfo devinfo;
2130
2131 ahc_compile_devinfo(&devinfo,
2132 ahc->our_id,
2133 dev->target->target, dev->lun,
2134 dev->target->channel == 0 ? 'A' : 'B',
2135 ROLE_INITIATOR);
2136
2137 /*
2138 * We don't currently trust the mid-layer to
2139 * properly deal with queue full or busy. So,
2140 * when one occurs, we tell the mid-layer to
2141 * unconditionally requeue the command to us
2142 * so that we can retry it ourselves. We also
2143 * implement our own throttling mechanism so
2144 * we don't clobber the device with too many
2145 * commands.
2146 */
2147 switch (ahc_get_scsi_status(scb)) {
2148 default:
2149 break;
2150 case SCSI_STATUS_CHECK_COND:
2151 case SCSI_STATUS_CMD_TERMINATED:
2152 {
013791ee 2153 struct scsi_cmnd *cmd;
1da177e4
LT		 2154
2155 /*
2156 * Copy sense information to the OS's cmd
2157 * structure if it is available.
2158 */
2159 cmd = scb->io_ctx;
2160 if (scb->flags & SCB_SENSE) {
2161 u_int sense_size;
2162
2163 sense_size = MIN(sizeof(struct scsi_sense_data)
2164 - ahc_get_sense_residual(scb),
2165 sizeof(cmd->sense_buffer));
2166 memcpy(cmd->sense_buffer,
2167 ahc_get_sense_buf(ahc, scb), sense_size);
2168 if (sense_size < sizeof(cmd->sense_buffer))
2169 memset(&cmd->sense_buffer[sense_size], 0,
2170 sizeof(cmd->sense_buffer) - sense_size);
2171 cmd->result |= (DRIVER_SENSE << 24);
2172#ifdef AHC_DEBUG
2173 if (ahc_debug & AHC_SHOW_SENSE) {
2174 int i;
2175
2176 printf("Copied %d bytes of sense data:",
2177 sense_size);
2178 for (i = 0; i < sense_size; i++) {
2179 if ((i & 0xF) == 0)
2180 printf("\n");
2181 printf("0x%x ", cmd->sense_buffer[i]);
2182 }
2183 printf("\n");
2184 }
2185#endif
2186 }
2187 break;
2188 }
2189 case SCSI_STATUS_QUEUE_FULL:
2190 {
2191 /*
2192 * By the time the core driver has returned this
2193 * command, all other commands that were queued
2194 * to us but not the device have been returned.
2195 * This ensures that dev->active is equal to
2196 * the number of commands actually queued to
2197 * the device.
2198 */
2199 dev->tag_success_count = 0;
2200 if (dev->active != 0) {
2201 /*
2202 * Drop our opening count to the number
2203 * of commands currently outstanding.
2204 */
2205 dev->openings = 0;
2206/*
2207 ahc_print_path(ahc, scb);
2208 printf("Dropping tag count to %d\n", dev->active);
2209 */
2210 if (dev->active == dev->tags_on_last_queuefull) {
2211
2212 dev->last_queuefull_same_count++;
2213 /*
2214 * If we repeatedly see a queue full
2215 * at the same queue depth, this
2216 * device has a fixed number of tag
2217 * slots. Lock in this tag depth
2218 * so we stop seeing queue fulls from
2219 * this device.
2220 */
2221 if (dev->last_queuefull_same_count
2222 == AHC_LOCK_TAGS_COUNT) {
2223 dev->maxtags = dev->active;
2224 ahc_print_path(ahc, scb);
2225 printf("Locking max tag count at %d\n",
2226 dev->active);
2227 }
2228 } else {
2229 dev->tags_on_last_queuefull = dev->active;
2230 dev->last_queuefull_same_count = 0;
2231 }
2232 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
2233 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
2234 ahc_platform_set_tags(ahc, &devinfo,
2235 (dev->flags & AHC_DEV_Q_BASIC)
2236 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
2237 break;
2238 }
2239 /*
2240 * Drop down to a single opening, and treat this
2241 * as if the target returned BUSY SCSI status.
2242 */
2243 dev->openings = 1;
2244 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
2245 ahc_platform_set_tags(ahc, &devinfo,
2246 (dev->flags & AHC_DEV_Q_BASIC)
2247 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
2248 /* FALLTHROUGH */
2249 }
2250 case SCSI_STATUS_BUSY:
2251 {
2252 /*
2253 * Set a short timer to defer sending commands for
2254 * a bit since Linux will not delay in this case.
2255 */
2256 if ((dev->flags & AHC_DEV_TIMER_ACTIVE) != 0) {
2257 printf("%s:%c:%d: Device Timer still active during "
2258 "busy processing\n", ahc_name(ahc),
2259 dev->target->channel, dev->target->target);
2260 break;
2261 }
2262 dev->flags |= AHC_DEV_TIMER_ACTIVE;
2263 dev->qfrozen++;
2264 init_timer(&dev->timer);
2265 dev->timer.data = (u_long)dev;
2266 dev->timer.expires = jiffies + (HZ/2);
2267 dev->timer.function = ahc_linux_dev_timed_unfreeze;
2268 add_timer(&dev->timer);
2269 break;
2270 }
2271 }
2272}
2273
2274static void
013791ee 2275ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1da177e4
LT		 2276{
2277 /*
2278 * Typically, the complete queue has very few entries
2279 * queued to it before the queue is emptied by
2280 * ahc_linux_run_complete_queue, so sorting the entries
2281 * by generation number should be inexpensive.
2282 * We perform the sort so that commands that complete
2283 * with an error are retuned in the order origionally
2284 * queued to the controller so that any subsequent retries
2285 * are performed in order. The underlying ahc routines do
2286 * not guarantee the order that aborted commands will be
2287 * returned to us.
2288 */
2289 struct ahc_completeq *completeq;
2290 struct ahc_cmd *list_cmd;
2291 struct ahc_cmd *acmd;
2292
2293 /*
2294 * Map CAM error codes into Linux Error codes. We
2295 * avoid the conversion so that the DV code has the
2296 * full error information available when making
2297 * state change decisions.
2298 */
cb624029 2299 {
1da177e4
LT		 2300 u_int new_status;
2301
2302 switch (ahc_cmd_get_transaction_status(cmd)) {
2303 case CAM_REQ_INPROG:
2304 case CAM_REQ_CMP:
2305 case CAM_SCSI_STATUS_ERROR:
2306 new_status = DID_OK;
2307 break;
2308 case CAM_REQ_ABORTED:
2309 new_status = DID_ABORT;
2310 break;
2311 case CAM_BUSY:
2312 new_status = DID_BUS_BUSY;
2313 break;
2314 case CAM_REQ_INVALID:
2315 case CAM_PATH_INVALID:
2316 new_status = DID_BAD_TARGET;
2317 break;
2318 case CAM_SEL_TIMEOUT:
2319 new_status = DID_NO_CONNECT;
2320 break;
2321 case CAM_SCSI_BUS_RESET:
2322 case CAM_BDR_SENT:
2323 new_status = DID_RESET;
2324 break;
2325 case CAM_UNCOR_PARITY:
2326 new_status = DID_PARITY;
2327 break;
2328 case CAM_CMD_TIMEOUT:
2329 new_status = DID_TIME_OUT;
2330 break;
2331 case CAM_UA_ABORT:
2332 case CAM_REQ_CMP_ERR:
2333 case CAM_AUTOSENSE_FAIL:
2334 case CAM_NO_HBA:
2335 case CAM_DATA_RUN_ERR:
2336 case CAM_UNEXP_BUSFREE:
2337 case CAM_SEQUENCE_FAIL:
2338 case CAM_CCB_LEN_ERR:
2339 case CAM_PROVIDE_FAIL:
2340 case CAM_REQ_TERMIO:
2341 case CAM_UNREC_HBA_ERROR:
2342 case CAM_REQ_TOO_BIG:
2343 new_status = DID_ERROR;
2344 break;
2345 case CAM_REQUEUE_REQ:
2346 /*
2347 * If we want the request requeued, make sure there
2348 * are sufficent retries. In the old scsi error code,
2349 * we used to be able to specify a result code that
2350 * bypassed the retry count. Now we must use this
2351 * hack. We also "fake" a check condition with
2352 * a sense code of ABORTED COMMAND. This seems to
2353 * evoke a retry even if this command is being sent
2354 * via the eh thread. Ick! Ick! Ick!
2355 */
2356 if (cmd->retries > 0)
2357 cmd->retries--;
2358 new_status = DID_OK;
2359 ahc_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
2360 cmd->result |= (DRIVER_SENSE << 24);
2361 memset(cmd->sense_buffer, 0,
2362 sizeof(cmd->sense_buffer));
2363 cmd->sense_buffer[0] = SSD_ERRCODE_VALID
2364 | SSD_CURRENT_ERROR;
2365 cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
2366 break;
2367 default:
2368 /* We should never get here */
2369 new_status = DID_ERROR;
2370 break;
2371 }
2372
2373 ahc_cmd_set_transaction_status(cmd, new_status);
2374 }
2375
2376 completeq = &ahc->platform_data->completeq;
2377 list_cmd = TAILQ_FIRST(completeq);
2378 acmd = (struct ahc_cmd *)cmd;
2379 while (list_cmd != NULL
2380 && acmd_scsi_cmd(list_cmd).serial_number
2381 < acmd_scsi_cmd(acmd).serial_number)
2382 list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
2383 if (list_cmd != NULL)
2384 TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
2385 else
2386 TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
2387}
2388
1da177e4
LT		 2389static void
2390ahc_linux_sem_timeout(u_long arg)
2391{
2392 struct ahc_softc *ahc;
2393 u_long s;
2394
2395 ahc = (struct ahc_softc *)arg;
2396
2397 ahc_lock(ahc, &s);
2398 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2399 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2400 up(&ahc->platform_data->eh_sem);
2401 }
2402 ahc_unlock(ahc, &s);
2403}
2404
2405static void
2406ahc_linux_freeze_simq(struct ahc_softc *ahc)
2407{
2408 ahc->platform_data->qfrozen++;
2409 if (ahc->platform_data->qfrozen == 1) {
2410 scsi_block_requests(ahc->platform_data->host);
2411
2412 /* XXX What about Twin channels? */
2413 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2414 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2415 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2416 }
2417}
2418
2419static void
2420ahc_linux_release_simq(u_long arg)
2421{
2422 struct ahc_softc *ahc;
2423 u_long s;
2424 int unblock_reqs;
2425
2426 ahc = (struct ahc_softc *)arg;
2427
2428 unblock_reqs = 0;
2429 ahc_lock(ahc, &s);
2430 if (ahc->platform_data->qfrozen > 0)
2431 ahc->platform_data->qfrozen--;
2432 if (ahc->platform_data->qfrozen == 0)
2433 unblock_reqs = 1;
1da177e4
LT		 2434 ahc_unlock(ahc, &s);
2435 /*
2436 * There is still a race here. The mid-layer
2437 * should keep its own freeze count and use
2438 * a bottom half handler to run the queues
2439 * so we can unblock with our own lock held.
2440 */
2441 if (unblock_reqs)
2442 scsi_unblock_requests(ahc->platform_data->host);
2443}
2444
2445static void
2446ahc_linux_dev_timed_unfreeze(u_long arg)
2447{
2448 struct ahc_linux_device *dev;
2449 struct ahc_softc *ahc;
2450 u_long s;
2451
2452 dev = (struct ahc_linux_device *)arg;
2453 ahc = dev->target->ahc;
2454 ahc_lock(ahc, &s);
2455 dev->flags &= ~AHC_DEV_TIMER_ACTIVE;
2456 if (dev->qfrozen > 0)
2457 dev->qfrozen--;
e4e360c3 2458 if (dev->active == 0)
1da177e4
LT		 2459 __ahc_linux_free_device(ahc, dev);
2460 ahc_unlock(ahc, &s);
2461}
2462
2463static int
013791ee 2464ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
1da177e4
LT		 2465{
2466 struct ahc_softc *ahc;
1da177e4
LT		 2467 struct ahc_linux_device *dev;
2468 struct scb *pending_scb;
1da177e4
LT		 2469 u_int saved_scbptr;
2470 u_int active_scb_index;
2471 u_int last_phase;
2472 u_int saved_scsiid;
2473 u_int cdb_byte;
2474 int retval;
2475 int was_paused;
2476 int paused;
2477 int wait;
2478 int disconnected;
2479
2480 pending_scb = NULL;
2481 paused = FALSE;
2482 wait = FALSE;
2483 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
1da177e4
LT		 2484
2485 printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
2486 ahc_name(ahc), cmd->device->channel,
2487 cmd->device->id, cmd->device->lun,
2488 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2489
2490 printf("CDB:");
2491 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2492 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2493 printf("\n");
2494
1da177e4
LT		 2495 /*
2496 * First determine if we currently own this command.
2497 * Start by searching the device queue. If not found
2498 * there, check the pending_scb list. If not found
2499 * at all, and the system wanted us to just abort the
2500 * command, return success.
2501 */
2502 dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
2503 cmd->device->lun, /*alloc*/FALSE);
2504
2505 if (dev == NULL) {
2506 /*
2507 * No target device for this command exists,
2508 * so we must not still own the command.
2509 */
2510 printf("%s:%d:%d:%d: Is not an active device\n",
2511 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2512 cmd->device->lun);
2513 retval = SUCCESS;
2514 goto no_cmd;
2515 }
2516
1da177e4
LT		 2517 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2518 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2519 cmd->device->channel + 'A',
2520 cmd->device->lun,
2521 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2522 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2523 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2524 cmd->device->lun);
2525 retval = SUCCESS;
2526 goto done;
2527 }
2528
2529 /*
2530 * See if we can find a matching cmd in the pending list.
2531 */
2532 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2533 if (pending_scb->io_ctx == cmd)
2534 break;
2535 }
2536
2537 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2538
2539 /* Any SCB for this device will do for a target reset */
2540 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2541 if (ahc_match_scb(ahc, pending_scb, cmd->device->id,
2542 cmd->device->channel + 'A',
2543 CAM_LUN_WILDCARD,
2544 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2545 break;
2546 }
2547 }
2548
2549 if (pending_scb == NULL) {
2550 printf("%s:%d:%d:%d: Command not found\n",
2551 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2552 cmd->device->lun);
2553 goto no_cmd;
2554 }
2555
2556 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2557 /*
2558 * We can't queue two recovery actions using the same SCB
2559 */
2560 retval = FAILED;
2561 goto done;
2562 }
2563
2564 /*
2565 * Ensure that the card doesn't do anything
2566 * behind our back and that we didn't "just" miss
2567 * an interrupt that would affect this cmd.
2568 */
2569 was_paused = ahc_is_paused(ahc);
2570 ahc_pause_and_flushwork(ahc);
2571 paused = TRUE;
2572
2573 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2574 printf("%s:%d:%d:%d: Command already completed\n",
2575 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2576 cmd->device->lun);
2577 goto no_cmd;
2578 }
2579
2580 printf("%s: At time of recovery, card was %spaused\n",
2581 ahc_name(ahc), was_paused ? "" : "not ");
2582 ahc_dump_card_state(ahc);
2583
2584 disconnected = TRUE;
2585 if (flag == SCB_ABORT) {
2586 if (ahc_search_qinfifo(ahc, cmd->device->id,
2587 cmd->device->channel + 'A',
2588 cmd->device->lun,
2589 pending_scb->hscb->tag,
2590 ROLE_INITIATOR, CAM_REQ_ABORTED,
2591 SEARCH_COMPLETE) > 0) {
2592 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2593 ahc_name(ahc), cmd->device->channel,
2594 cmd->device->id, cmd->device->lun);
2595 retval = SUCCESS;
2596 goto done;
2597 }
2598 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2599 cmd->device->channel + 'A',
2600 cmd->device->lun, pending_scb->hscb->tag,
2601 ROLE_INITIATOR, /*status*/0,
2602 SEARCH_COUNT) > 0) {
2603 disconnected = FALSE;
2604 }
2605
2606 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2607 struct scb *bus_scb;
2608
2609 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2610 if (bus_scb == pending_scb)
2611 disconnected = FALSE;
2612 else if (flag != SCB_ABORT
2613 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2614 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2615 disconnected = FALSE;
2616 }
2617
2618 /*
2619 * At this point, pending_scb is the scb associated with the
2620 * passed in command. That command is currently active on the
2621 * bus, is in the disconnected state, or we're hoping to find
2622 * a command for the same target active on the bus to abuse to
2623 * send a BDR. Queue the appropriate message based on which of
2624 * these states we are in.
2625 */
2626 last_phase = ahc_inb(ahc, LASTPHASE);
2627 saved_scbptr = ahc_inb(ahc, SCBPTR);
2628 active_scb_index = ahc_inb(ahc, SCB_TAG);
2629 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2630 if (last_phase != P_BUSFREE
2631 && (pending_scb->hscb->tag == active_scb_index
2632 || (flag == SCB_DEVICE_RESET
2633 && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) {
2634
2635 /*
2636 * We're active on the bus, so assert ATN
2637 * and hope that the target responds.
2638 */
2639 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2640 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2641 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2642 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2643 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2644 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2645 cmd->device->lun);
2646 wait = TRUE;
2647 } else if (disconnected) {
2648
2649 /*
2650 * Actually re-queue this SCB in an attempt
2651 * to select the device before it reconnects.
2652 * In either case (selection or reselection),
2653 * we will now issue the approprate message
2654 * to the timed-out device.
2655 *
2656 * Set the MK_MESSAGE control bit indicating
2657 * that we desire to send a message. We
2658 * also set the disconnected flag since
2659 * in the paging case there is no guarantee
2660 * that our SCB control byte matches the
2661 * version on the card. We don't want the
2662 * sequencer to abort the command thinking
2663 * an unsolicited reselection occurred.
2664 */
2665 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2666 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2667
2668 /*
2669 * Remove any cached copy of this SCB in the
2670 * disconnected list in preparation for the
2671 * queuing of our abort SCB. We use the
2672 * same element in the SCB, SCB_NEXT, for
2673 * both the qinfifo and the disconnected list.
2674 */
2675 ahc_search_disc_list(ahc, cmd->device->id,
2676 cmd->device->channel + 'A',
2677 cmd->device->lun, pending_scb->hscb->tag,
2678 /*stop_on_first*/TRUE,
2679 /*remove*/TRUE,
2680 /*save_state*/FALSE);
2681
2682 /*
2683 * In the non-paging case, the sequencer will
2684 * never re-reference the in-core SCB.
2685 * To make sure we are notified during
2686 * reslection, set the MK_MESSAGE flag in
2687 * the card's copy of the SCB.
2688 */
2689 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2690 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2691 ahc_outb(ahc, SCB_CONTROL,
2692 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2693 }
2694
2695 /*
2696 * Clear out any entries in the QINFIFO first
2697 * so we are the next SCB for this target
2698 * to run.
2699 */
2700 ahc_search_qinfifo(ahc, cmd->device->id,
2701 cmd->device->channel + 'A',
2702 cmd->device->lun, SCB_LIST_NULL,
2703 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2704 SEARCH_COMPLETE);
2705 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2706 ahc_outb(ahc, SCBPTR, saved_scbptr);
2707 ahc_print_path(ahc, pending_scb);
2708 printf("Device is disconnected, re-queuing SCB\n");
2709 wait = TRUE;
2710 } else {
2711 printf("%s:%d:%d:%d: Unable to deliver message\n",
2712 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2713 cmd->device->lun);
2714 retval = FAILED;
2715 goto done;
2716 }
2717
2718no_cmd:
2719 /*
2720 * Our assumption is that if we don't have the command, no
2721 * recovery action was required, so we return success. Again,
2722 * the semantics of the mid-layer recovery engine are not
2723 * well defined, so this may change in time.
2724 */
2725 retval = SUCCESS;
2726done:
2727 if (paused)
2728 ahc_unpause(ahc);
2729 if (wait) {
2730 struct timer_list timer;
2731 int ret;
2732
2733 ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
2734 spin_unlock_irq(&ahc->platform_data->spin_lock);
2735 init_timer(&timer);
2736 timer.data = (u_long)ahc;
2737 timer.expires = jiffies + (5 * HZ);
2738 timer.function = ahc_linux_sem_timeout;
2739 add_timer(&timer);
2740 printf("Recovery code sleeping\n");
2741 down(&ahc->platform_data->eh_sem);
2742 printf("Recovery code awake\n");
2743 ret = del_timer_sync(&timer);
2744 if (ret == 0) {
2745 printf("Timer Expired\n");
2746 retval = FAILED;
2747 }
2748 spin_lock_irq(&ahc->platform_data->spin_lock);
2749 }
1da177e4 2750 ahc_linux_run_complete_queue(ahc);
1da177e4
LT		 2751 return (retval);
2752}
2753
2754void
2755ahc_platform_dump_card_state(struct ahc_softc *ahc)
2756{
1da177e4
LT		 2757}
2758
2759static void ahc_linux_exit(void);
2760
fad01ef8
JB		 2761static void ahc_linux_get_width(struct scsi_target *starget)
2762{
2763 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2764 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2765 struct ahc_tmode_tstate *tstate;
2766 struct ahc_initiator_tinfo *tinfo
2767 = ahc_fetch_transinfo(ahc,
2768 starget->channel + 'A',
2769 shost->this_id, starget->id, &tstate);
2770 spi_width(starget) = tinfo->curr.width;
2771}
2772
2773static void ahc_linux_set_width(struct scsi_target *starget, int width)
2774{
2775 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2776 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2777 struct ahc_devinfo devinfo;
2778 unsigned long flags;
2779
2780 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2781 starget->channel + 'A', ROLE_INITIATOR);
2782 ahc_lock(ahc, &flags);
2783 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2784 ahc_unlock(ahc, &flags);
2785}
2786
92d161c3 2787static void ahc_linux_get_period(struct scsi_target *starget)
2788{
2789 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2790 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2791 struct ahc_tmode_tstate *tstate;
2792 struct ahc_initiator_tinfo *tinfo
2793 = ahc_fetch_transinfo(ahc,
2794 starget->channel + 'A',
2795 shost->this_id, starget->id, &tstate);
2796 spi_period(starget) = tinfo->curr.period;
2797}
2798
2799static void ahc_linux_set_period(struct scsi_target *starget, int period)
2800{
2801 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2802 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2803 struct ahc_tmode_tstate *tstate;
2804 struct ahc_initiator_tinfo *tinfo
2805 = ahc_fetch_transinfo(ahc,
2806 starget->channel + 'A',
2807 shost->this_id, starget->id, &tstate);
2808 struct ahc_devinfo devinfo;
2809 unsigned int ppr_options = tinfo->curr.ppr_options;
2810 unsigned long flags;
2811 unsigned long offset = tinfo->curr.offset;
2812 struct ahc_syncrate *syncrate;
2813
2814 if (offset == 0)
2815 offset = MAX_OFFSET;
2816
2817 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2818 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8
JB		 2819
2820 /* all PPR requests apart from QAS require wide transfers */
2821 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2822 ahc_linux_get_width(starget);
2823 if (spi_width(starget) == 0)
2824 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2825 }
2826
92d161c3 2827 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2828 ahc_lock(ahc, &flags);
2829 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2830 ppr_options, AHC_TRANS_GOAL, FALSE);
2831 ahc_unlock(ahc, &flags);
2832}
2833
2834static void ahc_linux_get_offset(struct scsi_target *starget)
2835{
2836 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2837 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2838 struct ahc_tmode_tstate *tstate;
2839 struct ahc_initiator_tinfo *tinfo
2840 = ahc_fetch_transinfo(ahc,
2841 starget->channel + 'A',
2842 shost->this_id, starget->id, &tstate);
2843 spi_offset(starget) = tinfo->curr.offset;
2844}
2845
2846static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2847{
2848 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2849 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2850 struct ahc_tmode_tstate *tstate;
2851 struct ahc_initiator_tinfo *tinfo
2852 = ahc_fetch_transinfo(ahc,
2853 starget->channel + 'A',
2854 shost->this_id, starget->id, &tstate);
2855 struct ahc_devinfo devinfo;
2856 unsigned int ppr_options = 0;
2857 unsigned int period = 0;
2858 unsigned long flags;
2859 struct ahc_syncrate *syncrate = NULL;
2860
2861 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2862 starget->channel + 'A', ROLE_INITIATOR);
2863 if (offset != 0) {
2864 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2865 period = tinfo->curr.period;
2866 ppr_options = tinfo->curr.ppr_options;
2867 }
2868 ahc_lock(ahc, &flags);
2869 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2870 ppr_options, AHC_TRANS_GOAL, FALSE);
2871 ahc_unlock(ahc, &flags);
2872}
2873
92d161c3 2874static void ahc_linux_get_dt(struct scsi_target *starget)
2875{
2876 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2877 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2878 struct ahc_tmode_tstate *tstate;
2879 struct ahc_initiator_tinfo *tinfo
2880 = ahc_fetch_transinfo(ahc,
2881 starget->channel + 'A',
2882 shost->this_id, starget->id, &tstate);
2883 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
2884}
2885
2886static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2887{
2888 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2889 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2890 struct ahc_tmode_tstate *tstate;
2891 struct ahc_initiator_tinfo *tinfo
2892 = ahc_fetch_transinfo(ahc,
2893 starget->channel + 'A',
2894 shost->this_id, starget->id, &tstate);
2895 struct ahc_devinfo devinfo;
2896 unsigned int ppr_options = tinfo->curr.ppr_options
2897 & ~MSG_EXT_PPR_DT_REQ;
2898 unsigned int period = tinfo->curr.period;
2899 unsigned long flags;
2900 struct ahc_syncrate *syncrate;
2901
2902 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2903 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2904 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
92d161c3 2905 ahc_lock(ahc, &flags);
2906 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
2907 ppr_options, AHC_TRANS_GOAL, FALSE);
2908 ahc_unlock(ahc, &flags);
2909}
2910
2911static void ahc_linux_get_qas(struct scsi_target *starget)
2912{
2913 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2914 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2915 struct ahc_tmode_tstate *tstate;
2916 struct ahc_initiator_tinfo *tinfo
2917 = ahc_fetch_transinfo(ahc,
2918 starget->channel + 'A',
2919 shost->this_id, starget->id, &tstate);
2920 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
2921}
2922
2923static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2924{
2925 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2926 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2927 struct ahc_tmode_tstate *tstate;
2928 struct ahc_initiator_tinfo *tinfo
2929 = ahc_fetch_transinfo(ahc,
2930 starget->channel + 'A',
2931 shost->this_id, starget->id, &tstate);
2932 struct ahc_devinfo devinfo;
2933 unsigned int ppr_options = tinfo->curr.ppr_options
2934 & ~MSG_EXT_PPR_QAS_REQ;
2935 unsigned int period = tinfo->curr.period;
92d161c3 2936 unsigned long flags;
2937 struct ahc_syncrate *syncrate;
2938
2939 if (qas)
2940 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2941
2942 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2943 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2944 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2945 ahc_lock(ahc, &flags);
2946 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
2947 ppr_options, AHC_TRANS_GOAL, FALSE);
2948 ahc_unlock(ahc, &flags);
2949}
2950
2951static void ahc_linux_get_iu(struct scsi_target *starget)
2952{
2953 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2954 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2955 struct ahc_tmode_tstate *tstate;
2956 struct ahc_initiator_tinfo *tinfo
2957 = ahc_fetch_transinfo(ahc,
2958 starget->channel + 'A',
2959 shost->this_id, starget->id, &tstate);
2960 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
2961}
2962
2963static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2964{
2965 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2966 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2967 struct ahc_tmode_tstate *tstate;
2968 struct ahc_initiator_tinfo *tinfo
2969 = ahc_fetch_transinfo(ahc,
2970 starget->channel + 'A',
2971 shost->this_id, starget->id, &tstate);
2972 struct ahc_devinfo devinfo;
2973 unsigned int ppr_options = tinfo->curr.ppr_options
2974 & ~MSG_EXT_PPR_IU_REQ;
2975 unsigned int period = tinfo->curr.period;
92d161c3 2976 unsigned long flags;
2977 struct ahc_syncrate *syncrate;
2978
2979 if (iu)
2980 ppr_options |= MSG_EXT_PPR_IU_REQ;
2981
2982 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2983 starget->channel + 'A', ROLE_INITIATOR);
fad01ef8 2984 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
92d161c3 2985 ahc_lock(ahc, &flags);
2986 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
2987 ppr_options, AHC_TRANS_GOAL, FALSE);
2988 ahc_unlock(ahc, &flags);
2989}
2990
2991static struct spi_function_template ahc_linux_transport_functions = {
2992 .get_offset = ahc_linux_get_offset,
2993 .set_offset = ahc_linux_set_offset,
2994 .show_offset = 1,
2995 .get_period = ahc_linux_get_period,
2996 .set_period = ahc_linux_set_period,
2997 .show_period = 1,
2998 .get_width = ahc_linux_get_width,
2999 .set_width = ahc_linux_set_width,
3000 .show_width = 1,
3001 .get_dt = ahc_linux_get_dt,
3002 .set_dt = ahc_linux_set_dt,
3003 .show_dt = 1,
3004 .get_iu = ahc_linux_get_iu,
3005 .set_iu = ahc_linux_set_iu,
3006 .show_iu = 1,
3007 .get_qas = ahc_linux_get_qas,
3008 .set_qas = ahc_linux_set_qas,
3009 .show_qas = 1,
3010};
3011
3012
3013
1da177e4
LT		 3014static int __init
3015ahc_linux_init(void)
3016{
92d161c3 3017 ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions);
3018 if (!ahc_linux_transport_template)
3019 return -ENODEV;
858eaca1
JB		 3020 if (ahc_linux_detect(&aic7xxx_driver_template))
3021 return 0;
92d161c3 3022 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 3023 ahc_linux_exit();
3024 return -ENODEV;
1da177e4
LT		 3025}
3026
3027static void
3028ahc_linux_exit(void)
3029{
1da177e4
LT		 3030 ahc_linux_pci_exit();
3031 ahc_linux_eisa_exit();
92d161c3 3032 spi_release_transport(ahc_linux_transport_template);
1da177e4
LT		 3033}
3034
3035module_init(ahc_linux_init);
3036module_exit(ahc_linux_exit);
Linux kernel - Deliverables
This page took 0.157848 seconds and 5 git commands to generate.