2 * Adaptec AIC79xx device driver for Linux.
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
6 * --------------------------------------------------------------------------
7 * Copyright (c) 1994-2000 Justin T. Gibbs.
8 * Copyright (c) 1997-1999 Doug Ledford
9 * Copyright (c) 2000-2003 Adaptec Inc.
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
45 #include "aic79xx_osm.h"
46 #include "aic79xx_inline.h"
47 #include <scsi/scsicam.h>
50 * Include aiclib.c as part of our
51 * "module dependencies are hard" work around.
55 #include <linux/init.h> /* __setup */
56 #include <linux/mm.h> /* For fetching system memory size */
57 #include <linux/delay.h> /* For ssleep/msleep */
60 * Lock protecting manipulation of the ahd softc list.
62 spinlock_t ahd_list_spinlock;
65 * Bucket size for counting good commands in between bad ones.
67 #define AHD_LINUX_ERR_THRESH 1000
70 * Set this to the delay in seconds after SCSI bus reset.
71 * Note, we honor this only for the initial bus reset.
72 * The scsi error recovery code performs its own bus settle
73 * delay handling for error recovery actions.
75 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
76 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
78 #define AIC79XX_RESET_DELAY 5000
82 * To change the default number of tagged transactions allowed per-device,
83 * add a line to the lilo.conf file like:
84 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
85 * which will result in the first four devices on the first two
86 * controllers being set to a tagged queue depth of 32.
88 * The tag_commands is an array of 16 to allow for wide and twin adapters.
89 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
93 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
97 * Modify this as you see fit for your system.
99 * 0 tagged queuing disabled
100 * 1 <= n <= 253 n == max tags ever dispatched.
102 * The driver will throttle the number of commands dispatched to a
103 * device if it returns queue full. For devices with a fixed maximum
104 * queue depth, the driver will eventually determine this depth and
105 * lock it in (a console message is printed to indicate that a lock
106 * has occurred). On some devices, queue full is returned for a temporary
107 * resource shortage. These devices will return queue full at varying
108 * depths. The driver will throttle back when the queue fulls occur and
109 * attempt to slowly increase the depth over time as the device recovers
110 * from the resource shortage.
112 * In this example, the first line will disable tagged queueing for all
113 * the devices on the first probed aic79xx adapter.
115 * The second line enables tagged queueing with 4 commands/LUN for IDs
116 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
117 * driver to attempt to use up to 64 tags for ID 1.
119 * The third line is the same as the first line.
121 * The fourth line disables tagged queueing for devices 0 and 3. It
122 * enables tagged queueing for the other IDs, with 16 commands/LUN
123 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
124 * IDs 2, 5-7, and 9-15.
128 * NOTE: The below structure is for reference only, the actual structure
129 * to modify in order to change things is just below this comment block.
130 adapter_tag_info_t aic79xx_tag_info[] =
132 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
133 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
134 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
135 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
139 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
140 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
142 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
145 #define AIC79XX_CONFIGED_TAG_COMMANDS { \
146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
147 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
148 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
149 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
150 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
151 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
152 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
153 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
157 * By default, use the number of commands specified by
158 * the users kernel configuration.
160 static adapter_tag_info_t aic79xx_tag_info[] =
162 {AIC79XX_CONFIGED_TAG_COMMANDS},
163 {AIC79XX_CONFIGED_TAG_COMMANDS},
164 {AIC79XX_CONFIGED_TAG_COMMANDS},
165 {AIC79XX_CONFIGED_TAG_COMMANDS},
166 {AIC79XX_CONFIGED_TAG_COMMANDS},
167 {AIC79XX_CONFIGED_TAG_COMMANDS},
168 {AIC79XX_CONFIGED_TAG_COMMANDS},
169 {AIC79XX_CONFIGED_TAG_COMMANDS},
170 {AIC79XX_CONFIGED_TAG_COMMANDS},
171 {AIC79XX_CONFIGED_TAG_COMMANDS},
172 {AIC79XX_CONFIGED_TAG_COMMANDS},
173 {AIC79XX_CONFIGED_TAG_COMMANDS},
174 {AIC79XX_CONFIGED_TAG_COMMANDS},
175 {AIC79XX_CONFIGED_TAG_COMMANDS},
176 {AIC79XX_CONFIGED_TAG_COMMANDS},
177 {AIC79XX_CONFIGED_TAG_COMMANDS}
181 * By default, read streaming is disabled. In theory,
182 * read streaming should enhance performance, but early
183 * U320 drive firmware actually performs slower with
184 * read streaming enabled.
186 #ifdef CONFIG_AIC79XX_ENABLE_RD_STRM
187 #define AIC79XX_CONFIGED_RD_STRM 0xFFFF
189 #define AIC79XX_CONFIGED_RD_STRM 0
192 static uint16_t aic79xx_rd_strm_info[] =
194 AIC79XX_CONFIGED_RD_STRM,
195 AIC79XX_CONFIGED_RD_STRM,
196 AIC79XX_CONFIGED_RD_STRM,
197 AIC79XX_CONFIGED_RD_STRM,
198 AIC79XX_CONFIGED_RD_STRM,
199 AIC79XX_CONFIGED_RD_STRM,
200 AIC79XX_CONFIGED_RD_STRM,
201 AIC79XX_CONFIGED_RD_STRM,
202 AIC79XX_CONFIGED_RD_STRM,
203 AIC79XX_CONFIGED_RD_STRM,
204 AIC79XX_CONFIGED_RD_STRM,
205 AIC79XX_CONFIGED_RD_STRM,
206 AIC79XX_CONFIGED_RD_STRM,
207 AIC79XX_CONFIGED_RD_STRM,
208 AIC79XX_CONFIGED_RD_STRM,
209 AIC79XX_CONFIGED_RD_STRM
215 * positive value = DV Enabled
217 * negative value = DV Default for adapter type/seeprom
219 #ifdef CONFIG_AIC79XX_DV_SETTING
220 #define AIC79XX_CONFIGED_DV CONFIG_AIC79XX_DV_SETTING
222 #define AIC79XX_CONFIGED_DV -1
225 static int8_t aic79xx_dv_settings[] =
246 * The I/O cell on the chip is very configurable in respect to its analog
247 * characteristics. Set the defaults here; they can be overriden with
248 * the proper insmod parameters.
250 struct ahd_linux_iocell_opts
256 #define AIC79XX_DEFAULT_PRECOMP 0xFF
257 #define AIC79XX_DEFAULT_SLEWRATE 0xFF
258 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF
259 #define AIC79XX_DEFAULT_IOOPTS \
261 AIC79XX_DEFAULT_PRECOMP, \
262 AIC79XX_DEFAULT_SLEWRATE, \
263 AIC79XX_DEFAULT_AMPLITUDE \
265 #define AIC79XX_PRECOMP_INDEX 0
266 #define AIC79XX_SLEWRATE_INDEX 1
267 #define AIC79XX_AMPLITUDE_INDEX 2
268 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
270 AIC79XX_DEFAULT_IOOPTS,
271 AIC79XX_DEFAULT_IOOPTS,
272 AIC79XX_DEFAULT_IOOPTS,
273 AIC79XX_DEFAULT_IOOPTS,
274 AIC79XX_DEFAULT_IOOPTS,
275 AIC79XX_DEFAULT_IOOPTS,
276 AIC79XX_DEFAULT_IOOPTS,
277 AIC79XX_DEFAULT_IOOPTS,
278 AIC79XX_DEFAULT_IOOPTS,
279 AIC79XX_DEFAULT_IOOPTS,
280 AIC79XX_DEFAULT_IOOPTS,
281 AIC79XX_DEFAULT_IOOPTS,
282 AIC79XX_DEFAULT_IOOPTS,
283 AIC79XX_DEFAULT_IOOPTS,
284 AIC79XX_DEFAULT_IOOPTS,
285 AIC79XX_DEFAULT_IOOPTS
289 * There should be a specific return value for this in scsi.h, but
290 * it seems that most drivers ignore it.
292 #define DID_UNDERFLOW DID_ERROR
295 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
297 printk("(scsi%d:%c:%d:%d): ",
298 ahd->platform_data->host->host_no,
299 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
300 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
301 scb != NULL ? SCB_GET_LUN(scb) : -1);
305 * XXX - these options apply unilaterally to _all_ adapters
306 * cards in the system. This should be fixed. Exceptions to this
307 * rule are noted in the comments.
311 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
312 * has no effect on any later resets that might occur due to things like
315 static uint32_t aic79xx_no_reset;
318 * Certain PCI motherboards will scan PCI devices from highest to lowest,
319 * others scan from lowest to highest, and they tend to do all kinds of
320 * strange things when they come into contact with PCI bridge chips. The
321 * net result of all this is that the PCI card that is actually used to boot
322 * the machine is very hard to detect. Most motherboards go from lowest
323 * PCI slot number to highest, and the first SCSI controller found is the
324 * one you boot from. The only exceptions to this are when a controller
325 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
326 * from lowest PCI slot number to highest PCI slot number. We also force
327 * all controllers with their BIOS disabled to the end of the list. This
328 * works on *almost* all computers. Where it doesn't work, we have this
329 * option. Setting this option to non-0 will reverse the order of the sort
330 * to highest first, then lowest, but will still leave cards with their BIOS
331 * disabled at the very end. That should fix everyone up unless there are
332 * really strange cirumstances.
334 static uint32_t aic79xx_reverse_scan;
337 * Should we force EXTENDED translation on a controller.
338 * 0 == Use whatever is in the SEEPROM or default to off
339 * 1 == Use whatever is in the SEEPROM or default to on
341 static uint32_t aic79xx_extended;
344 * PCI bus parity checking of the Adaptec controllers. This is somewhat
345 * dubious at best. To my knowledge, this option has never actually
346 * solved a PCI parity problem, but on certain machines with broken PCI
347 * chipset configurations, it can generate tons of false error messages.
348 * It's included in the driver for completeness.
349 * 0 = Shut off PCI parity check
350 * non-0 = Enable PCI parity check
352 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
353 * variable to -1 you would actually want to simply pass the variable
354 * name without a number. That will invert the 0 which will result in
357 static uint32_t aic79xx_pci_parity = ~0;
360 * There are lots of broken chipsets in the world. Some of them will
361 * violate the PCI spec when we issue byte sized memory writes to our
362 * controller. I/O mapped register access, if allowed by the given
363 * platform, will work in almost all cases.
365 uint32_t aic79xx_allow_memio = ~0;
368 * aic79xx_detect() has been run, so register all device arrivals
369 * immediately with the system rather than deferring to the sorted
370 * attachment performed by aic79xx_detect().
372 int aic79xx_detect_complete;
375 * So that we can set how long each device is given as a selection timeout.
376 * The table of values goes like this:
381 * We default to 256ms because some older devices need a longer time
382 * to respond to initial selection.
384 static uint32_t aic79xx_seltime;
387 * Certain devices do not perform any aging on commands. Should the
388 * device be saturated by commands in one portion of the disk, it is
389 * possible for transactions on far away sectors to never be serviced.
390 * To handle these devices, we can periodically send an ordered tag to
391 * force all outstanding transactions to be serviced prior to a new
394 uint32_t aic79xx_periodic_otag;
397 * Module information and settable options.
399 static char *aic79xx = NULL;
401 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
402 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
403 MODULE_LICENSE("Dual BSD/GPL");
404 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
405 module_param(aic79xx, charp, 0);
406 MODULE_PARM_DESC(aic79xx,
407 "period delimited, options string.\n"
408 " verbose Enable verbose/diagnostic logging\n"
409 " allow_memio Allow device registers to be memory mapped\n"
410 " debug Bitmask of debug values to enable\n"
411 " no_reset Supress initial bus resets\n"
412 " extended Enable extended geometry on all controllers\n"
413 " periodic_otag Send an ordered tagged transaction\n"
414 " periodically to prevent tag starvation.\n"
415 " This may be required by some older disk\n"
416 " or drives/RAID arrays.\n"
417 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
418 " tag_info:<tag_str> Set per-target tag depth\n"
419 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
420 " rd_strm:<rd_strm_masks> Set per-target read streaming setting.\n"
421 " dv:<dv_settings> Set per-controller Domain Validation Setting.\n"
422 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
423 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
424 " amplitude:<int> Set the signal amplitude (0-7).\n"
425 " seltime:<int> Selection Timeout:\n"
426 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
428 " Sample /etc/modprobe.conf line:\n"
429 " Enable verbose logging\n"
430 " Set tag depth on Controller 2/Target 2 to 10 tags\n"
431 " Shorten the selection timeout to 128ms\n"
433 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
435 " Sample /etc/modprobe.conf line:\n"
436 " Change Read Streaming for Controller's 2 and 3\n"
438 " options aic79xx 'aic79xx=rd_strm:{..0xFFF0.0xC0F0}'");
440 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
441 struct ahd_linux_device *,
443 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
445 static void ahd_linux_filter_inquiry(struct ahd_softc *ahd,
446 struct ahd_devinfo *devinfo);
447 static void ahd_linux_dev_timed_unfreeze(u_long arg);
448 static void ahd_linux_sem_timeout(u_long arg);
449 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
450 static void ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd);
451 static void ahd_linux_start_dv(struct ahd_softc *ahd);
452 static void ahd_linux_dv_timeout(struct scsi_cmnd *cmd);
453 static int ahd_linux_dv_thread(void *data);
454 static void ahd_linux_kill_dv_thread(struct ahd_softc *ahd);
455 static void ahd_linux_dv_target(struct ahd_softc *ahd, u_int target);
456 static void ahd_linux_dv_transition(struct ahd_softc *ahd,
457 struct scsi_cmnd *cmd,
458 struct ahd_devinfo *devinfo,
459 struct ahd_linux_target *targ);
460 static void ahd_linux_dv_fill_cmd(struct ahd_softc *ahd,
461 struct scsi_cmnd *cmd,
462 struct ahd_devinfo *devinfo);
463 static void ahd_linux_dv_inq(struct ahd_softc *ahd,
464 struct scsi_cmnd *cmd,
465 struct ahd_devinfo *devinfo,
466 struct ahd_linux_target *targ,
467 u_int request_length);
468 static void ahd_linux_dv_tur(struct ahd_softc *ahd,
469 struct scsi_cmnd *cmd,
470 struct ahd_devinfo *devinfo);
471 static void ahd_linux_dv_rebd(struct ahd_softc *ahd,
472 struct scsi_cmnd *cmd,
473 struct ahd_devinfo *devinfo,
474 struct ahd_linux_target *targ);
475 static void ahd_linux_dv_web(struct ahd_softc *ahd,
476 struct scsi_cmnd *cmd,
477 struct ahd_devinfo *devinfo,
478 struct ahd_linux_target *targ);
479 static void ahd_linux_dv_reb(struct ahd_softc *ahd,
480 struct scsi_cmnd *cmd,
481 struct ahd_devinfo *devinfo,
482 struct ahd_linux_target *targ);
483 static void ahd_linux_dv_su(struct ahd_softc *ahd,
484 struct scsi_cmnd *cmd,
485 struct ahd_devinfo *devinfo,
486 struct ahd_linux_target *targ);
487 static int ahd_linux_fallback(struct ahd_softc *ahd,
488 struct ahd_devinfo *devinfo);
489 static __inline int ahd_linux_dv_fallback(struct ahd_softc *ahd,
490 struct ahd_devinfo *devinfo);
491 static void ahd_linux_dv_complete(Scsi_Cmnd *cmd);
492 static void ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ);
493 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
494 struct ahd_devinfo *devinfo);
495 static u_int ahd_linux_user_dv_setting(struct ahd_softc *ahd);
496 static void ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd);
497 static void ahd_linux_device_queue_depth(struct ahd_softc *ahd,
498 struct ahd_linux_device *dev);
499 static struct ahd_linux_target* ahd_linux_alloc_target(struct ahd_softc*,
501 static void ahd_linux_free_target(struct ahd_softc*,
502 struct ahd_linux_target*);
503 static struct ahd_linux_device* ahd_linux_alloc_device(struct ahd_softc*,
504 struct ahd_linux_target*,
506 static void ahd_linux_free_device(struct ahd_softc*,
507 struct ahd_linux_device*);
508 static int ahd_linux_run_command(struct ahd_softc*,
509 struct ahd_linux_device*,
511 static void ahd_linux_setup_tag_info_global(char *p);
512 static aic_option_callback_t ahd_linux_setup_tag_info;
513 static aic_option_callback_t ahd_linux_setup_rd_strm_info;
514 static aic_option_callback_t ahd_linux_setup_dv;
515 static aic_option_callback_t ahd_linux_setup_iocell_info;
516 static int ahd_linux_next_unit(void);
517 static int aic79xx_setup(char *c);
519 /****************************** Inlines ***************************************/
520 static __inline void ahd_schedule_completeq(struct ahd_softc *ahd);
521 static __inline struct ahd_linux_device*
522 ahd_linux_get_device(struct ahd_softc *ahd, u_int channel,
523 u_int target, u_int lun, int alloc);
524 static struct ahd_cmd *ahd_linux_run_complete_queue(struct ahd_softc *ahd);
525 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
528 ahd_schedule_completeq(struct ahd_softc *ahd)
530 if ((ahd->platform_data->flags & AHD_RUN_CMPLT_Q_TIMER) == 0) {
531 ahd->platform_data->flags |= AHD_RUN_CMPLT_Q_TIMER;
532 ahd->platform_data->completeq_timer.expires = jiffies;
533 add_timer(&ahd->platform_data->completeq_timer);
537 static __inline struct ahd_linux_device*
538 ahd_linux_get_device(struct ahd_softc *ahd, u_int channel, u_int target,
539 u_int lun, int alloc)
541 struct ahd_linux_target *targ;
542 struct ahd_linux_device *dev;
545 target_offset = target;
548 targ = ahd->platform_data->targets[target_offset];
551 targ = ahd_linux_alloc_target(ahd, channel, target);
557 dev = targ->devices[lun];
558 if (dev == NULL && alloc != 0)
559 dev = ahd_linux_alloc_device(ahd, targ, lun);
563 #define AHD_LINUX_MAX_RETURNED_ERRORS 4
564 static struct ahd_cmd *
565 ahd_linux_run_complete_queue(struct ahd_softc *ahd)
567 struct ahd_cmd *acmd;
572 ahd_done_lock(ahd, &done_flags);
573 while ((acmd = TAILQ_FIRST(&ahd->platform_data->completeq)) != NULL) {
576 if (with_errors > AHD_LINUX_MAX_RETURNED_ERRORS) {
578 * Linux uses stack recursion to requeue
579 * commands that need to be retried. Avoid
580 * blowing out the stack by "spoon feeding"
581 * commands that completed with error back
582 * the operating system in case they are going
583 * to be retried. "ick"
585 ahd_schedule_completeq(ahd);
588 TAILQ_REMOVE(&ahd->platform_data->completeq,
589 acmd, acmd_links.tqe);
590 cmd = &acmd_scsi_cmd(acmd);
591 cmd->host_scribble = NULL;
592 if (ahd_cmd_get_transaction_status(cmd) != DID_OK
593 || (cmd->result & 0xFF) != SCSI_STATUS_OK)
598 ahd_done_unlock(ahd, &done_flags);
603 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
609 direction = cmd->sc_data_direction;
610 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
611 if (cmd->use_sg != 0) {
612 struct scatterlist *sg;
614 sg = (struct scatterlist *)cmd->request_buffer;
615 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
616 } else if (cmd->request_bufflen != 0) {
617 pci_unmap_single(ahd->dev_softc,
618 scb->platform_data->buf_busaddr,
619 cmd->request_bufflen, direction);
623 /******************************** Macros **************************************/
624 #define BUILD_SCSIID(ahd, cmd) \
625 ((((cmd)->device->id << TID_SHIFT) & TID) | (ahd)->our_id)
627 /************************ Host template entry points *************************/
628 static int ahd_linux_detect(Scsi_Host_Template *);
629 static const char *ahd_linux_info(struct Scsi_Host *);
630 static int ahd_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
631 static int ahd_linux_slave_alloc(Scsi_Device *);
632 static int ahd_linux_slave_configure(Scsi_Device *);
633 static void ahd_linux_slave_destroy(Scsi_Device *);
634 #if defined(__i386__)
635 static int ahd_linux_biosparam(struct scsi_device*,
636 struct block_device*, sector_t, int[]);
638 static int ahd_linux_bus_reset(Scsi_Cmnd *);
639 static int ahd_linux_dev_reset(Scsi_Cmnd *);
640 static int ahd_linux_abort(Scsi_Cmnd *);
644 * Try to detect an Adaptec 79XX controller.
647 ahd_linux_detect(Scsi_Host_Template *template)
649 struct ahd_softc *ahd;
654 * Sanity checking of Linux SCSI data structures so
655 * that some of our hacks^H^H^H^H^Hassumptions aren't
658 if (offsetof(struct ahd_cmd_internal, end)
659 > offsetof(struct scsi_cmnd, host_scribble)) {
660 printf("ahd_linux_detect: SCSI data structures changed.\n");
661 printf("ahd_linux_detect: Unable to attach\n");
667 * If we've been passed any parameters, process them now.
670 aic79xx_setup(aic79xx);
673 template->proc_name = "aic79xx";
676 * Initialize our softc list lock prior to
677 * probing for any adapters.
682 error = ahd_linux_pci_init();
688 * Register with the SCSI layer all
689 * controllers we've found.
692 TAILQ_FOREACH(ahd, &ahd_tailq, links) {
694 if (ahd_linux_register_host(ahd, template) == 0)
697 aic79xx_detect_complete++;
702 * Return a string describing the driver.
705 ahd_linux_info(struct Scsi_Host *host)
707 static char buffer[512];
710 struct ahd_softc *ahd;
713 ahd = *(struct ahd_softc **)host->hostdata;
714 memset(bp, 0, sizeof(buffer));
715 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
716 strcat(bp, AIC79XX_DRIVER_VERSION);
719 strcat(bp, ahd->description);
722 ahd_controller_info(ahd, ahd_info);
723 strcat(bp, ahd_info);
730 * Queue an SCB to the controller.
733 ahd_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
735 struct ahd_softc *ahd;
736 struct ahd_linux_device *dev;
738 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
741 * Close the race of a command that was in the process of
742 * being queued to us just as our simq was frozen. Let
743 * DV commands through so long as we are only frozen to
746 if (ahd->platform_data->qfrozen != 0
747 && AHD_DV_CMD(cmd) == 0) {
748 printf("%s: queue frozen\n", ahd_name(ahd));
750 return SCSI_MLQUEUE_HOST_BUSY;
754 * Save the callback on completion function.
756 cmd->scsi_done = scsi_done;
758 dev = ahd_linux_get_device(ahd, cmd->device->channel,
759 cmd->device->id, cmd->device->lun,
763 cmd->result = CAM_REQ_INPROG << 16;
765 return ahd_linux_run_command(ahd, dev, cmd);
769 ahd_linux_slave_alloc(Scsi_Device *device)
771 struct ahd_softc *ahd;
773 ahd = *((struct ahd_softc **)device->host->hostdata);
775 printf("%s: Slave Alloc %d\n", ahd_name(ahd), device->id);
780 ahd_linux_slave_configure(Scsi_Device *device)
782 struct ahd_softc *ahd;
783 struct ahd_linux_device *dev;
786 ahd = *((struct ahd_softc **)device->host->hostdata);
788 printf("%s: Slave Configure %d\n", ahd_name(ahd), device->id);
789 ahd_midlayer_entrypoint_lock(ahd, &flags);
791 * Since Linux has attached to the device, configure
792 * it so we don't free and allocate the device
793 * structure on every command.
795 dev = ahd_linux_get_device(ahd, device->channel,
796 device->id, device->lun,
799 dev->flags &= ~AHD_DEV_UNCONFIGURED;
800 dev->flags |= AHD_DEV_SLAVE_CONFIGURED;
801 dev->scsi_device = device;
802 ahd_linux_device_queue_depth(ahd, dev);
804 ahd_midlayer_entrypoint_unlock(ahd, &flags);
809 ahd_linux_slave_destroy(Scsi_Device *device)
811 struct ahd_softc *ahd;
812 struct ahd_linux_device *dev;
815 ahd = *((struct ahd_softc **)device->host->hostdata);
817 printf("%s: Slave Destroy %d\n", ahd_name(ahd), device->id);
818 ahd_midlayer_entrypoint_lock(ahd, &flags);
819 dev = ahd_linux_get_device(ahd, device->channel,
820 device->id, device->lun,
824 * Filter out "silly" deletions of real devices by only
825 * deleting devices that have had slave_configure()
826 * called on them. All other devices that have not
827 * been configured will automatically be deleted by
828 * the refcounting process.
831 && (dev->flags & AHD_DEV_SLAVE_CONFIGURED) != 0) {
832 dev->flags |= AHD_DEV_UNCONFIGURED;
834 && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
835 ahd_linux_free_device(ahd, dev);
837 ahd_midlayer_entrypoint_unlock(ahd, &flags);
840 #if defined(__i386__)
842 * Return the disk geometry for the given SCSI device.
845 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
846 sector_t capacity, int geom[])
854 struct ahd_softc *ahd;
856 ahd = *((struct ahd_softc **)sdev->host->hostdata);
858 bh = scsi_bios_ptable(bdev);
860 ret = scsi_partsize(bh, capacity,
861 &geom[2], &geom[0], &geom[1]);
868 cylinders = aic_sector_div(capacity, heads, sectors);
870 if (aic79xx_extended != 0)
873 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
874 if (extended && cylinders >= 1024) {
877 cylinders = aic_sector_div(capacity, heads, sectors);
887 * Abort the current SCSI command(s).
890 ahd_linux_abort(Scsi_Cmnd *cmd)
892 struct ahd_softc *ahd;
893 struct ahd_cmd *acmd;
894 struct ahd_linux_device *dev;
895 struct scb *pending_scb;
906 ahd_mode_state saved_modes;
911 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
912 acmd = (struct ahd_cmd *)cmd;
914 printf("%s:%d:%d:%d: Attempting to abort cmd %p:",
915 ahd_name(ahd), cmd->device->channel, cmd->device->id,
916 cmd->device->lun, cmd);
917 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
918 printf(" 0x%x", cmd->cmnd[cdb_byte]);
922 * In all versions of Linux, we have to work around
923 * a major flaw in how the mid-layer is locked down
924 * if we are to sleep successfully in our error handler
925 * while allowing our interrupt handler to run. Since
926 * the midlayer acquires either the io_request_lock or
927 * our lock prior to calling us, we must use the
928 * spin_unlock_irq() method for unlocking our lock.
929 * This will force interrupts to be enabled on the
930 * current CPU. Since the EH thread should not have
931 * been running with CPU interrupts disabled other than
932 * by acquiring either the io_request_lock or our own
933 * lock, this *should* be safe.
935 ahd_midlayer_entrypoint_lock(ahd, &s);
938 * First determine if we currently own this command.
939 * Start by searching the device queue. If not found
940 * there, check the pending_scb list. If not found
941 * at all, and the system wanted us to just abort the
942 * command, return success.
944 dev = ahd_linux_get_device(ahd, cmd->device->channel,
945 cmd->device->id, cmd->device->lun,
950 * No target device for this command exists,
951 * so we must not still own the command.
953 printf("%s:%d:%d:%d: Is not an active device\n",
954 ahd_name(ahd), cmd->device->channel, cmd->device->id,
961 * See if we can find a matching cmd in the pending list.
963 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
964 if (pending_scb->io_ctx == cmd)
968 if (pending_scb == NULL) {
969 printf("%s:%d:%d:%d: Command not found\n",
970 ahd_name(ahd), cmd->device->channel, cmd->device->id,
975 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
977 * We can't queue two recovery actions using the same SCB
984 * Ensure that the card doesn't do anything
985 * behind our back. Also make sure that we
986 * didn't "just" miss an interrupt that would
989 was_paused = ahd_is_paused(ahd);
990 ahd_pause_and_flushwork(ahd);
993 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
994 printf("%s:%d:%d:%d: Command already completed\n",
995 ahd_name(ahd), cmd->device->channel, cmd->device->id,
1000 printf("%s: At time of recovery, card was %spaused\n",
1001 ahd_name(ahd), was_paused ? "" : "not ");
1002 ahd_dump_card_state(ahd);
1004 disconnected = TRUE;
1005 if (ahd_search_qinfifo(ahd, cmd->device->id, cmd->device->channel + 'A',
1006 cmd->device->lun, SCB_GET_TAG(pending_scb),
1007 ROLE_INITIATOR, CAM_REQ_ABORTED,
1008 SEARCH_COMPLETE) > 0) {
1009 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
1010 ahd_name(ahd), cmd->device->channel, cmd->device->id,
1016 saved_modes = ahd_save_modes(ahd);
1017 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
1018 last_phase = ahd_inb(ahd, LASTPHASE);
1019 saved_scbptr = ahd_get_scbptr(ahd);
1020 active_scbptr = saved_scbptr;
1021 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
1022 struct scb *bus_scb;
1024 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
1025 if (bus_scb == pending_scb)
1026 disconnected = FALSE;
1030 * At this point, pending_scb is the scb associated with the
1031 * passed in command. That command is currently active on the
1032 * bus or is in the disconnected state.
1034 if (last_phase != P_BUSFREE
1035 && SCB_GET_TAG(pending_scb) == active_scbptr) {
1038 * We're active on the bus, so assert ATN
1039 * and hope that the target responds.
1041 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
1042 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
1043 ahd_outb(ahd, MSG_OUT, HOST_MSG);
1044 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
1045 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
1046 ahd_name(ahd), cmd->device->channel,
1047 cmd->device->id, cmd->device->lun);
1049 } else if (disconnected) {
1052 * Actually re-queue this SCB in an attempt
1053 * to select the device before it reconnects.
1055 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
1056 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
1057 pending_scb->hscb->cdb_len = 0;
1058 pending_scb->hscb->task_attribute = 0;
1059 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
1061 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
1063 * Mark the SCB has having an outstanding
1064 * task management function. Should the command
1065 * complete normally before the task management
1066 * function can be sent, the host will be notified
1067 * to abort our requeued SCB.
1069 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
1070 pending_scb->hscb->task_management);
1073 * If non-packetized, set the MK_MESSAGE control
1074 * bit indicating that we desire to send a message.
1075 * We also set the disconnected flag since there is
1076 * no guarantee that our SCB control byte matches
1077 * the version on the card. We don't want the
1078 * sequencer to abort the command thinking an
1079 * unsolicited reselection occurred.
1081 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
1084 * The sequencer will never re-reference the
1085 * in-core SCB. To make sure we are notified
1086 * during reslection, set the MK_MESSAGE flag in
1087 * the card's copy of the SCB.
1089 ahd_outb(ahd, SCB_CONTROL,
1090 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
1094 * Clear out any entries in the QINFIFO first
1095 * so we are the next SCB for this target
1098 ahd_search_qinfifo(ahd, cmd->device->id,
1099 cmd->device->channel + 'A', cmd->device->lun,
1100 SCB_LIST_NULL, ROLE_INITIATOR,
1101 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
1102 ahd_qinfifo_requeue_tail(ahd, pending_scb);
1103 ahd_set_scbptr(ahd, saved_scbptr);
1104 ahd_print_path(ahd, pending_scb);
1105 printf("Device is disconnected, re-queuing SCB\n");
1108 printf("%s:%d:%d:%d: Unable to deliver message\n",
1109 ahd_name(ahd), cmd->device->channel,
1110 cmd->device->id, cmd->device->lun);
1117 * Our assumption is that if we don't have the command, no
1118 * recovery action was required, so we return success. Again,
1119 * the semantics of the mid-layer recovery engine are not
1120 * well defined, so this may change in time.
1127 struct timer_list timer;
1130 pending_scb->platform_data->flags |= AHD_SCB_UP_EH_SEM;
1131 spin_unlock_irq(&ahd->platform_data->spin_lock);
1133 timer.data = (u_long)pending_scb;
1134 timer.expires = jiffies + (5 * HZ);
1135 timer.function = ahd_linux_sem_timeout;
1137 printf("Recovery code sleeping\n");
1138 down(&ahd->platform_data->eh_sem);
1139 printf("Recovery code awake\n");
1140 ret = del_timer_sync(&timer);
1142 printf("Timer Expired\n");
1145 spin_lock_irq(&ahd->platform_data->spin_lock);
1147 ahd_linux_run_complete_queue(ahd);
1148 ahd_midlayer_entrypoint_unlock(ahd, &s);
1154 ahd_linux_dev_reset_complete(Scsi_Cmnd *cmd)
1156 free(cmd, M_DEVBUF);
1160 * Attempt to send a target reset message to the device that timed out.
1163 ahd_linux_dev_reset(Scsi_Cmnd *cmd)
1165 struct ahd_softc *ahd;
1166 struct scsi_cmnd *recovery_cmd;
1167 struct ahd_linux_device *dev;
1168 struct ahd_initiator_tinfo *tinfo;
1169 struct ahd_tmode_tstate *tstate;
1171 struct hardware_scb *hscb;
1173 struct timer_list timer;
1176 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
1177 recovery_cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
1180 memset(recovery_cmd, 0, sizeof(struct scsi_cmnd));
1181 recovery_cmd->device = cmd->device;
1182 recovery_cmd->scsi_done = ahd_linux_dev_reset_complete;
1184 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
1185 printf("%s:%d:%d:%d: Device reset called for cmd %p\n",
1186 ahd_name(ahd), cmd->device->channel, cmd->device->id,
1187 cmd->device->lun, cmd);
1191 dev = ahd_linux_get_device(ahd, cmd->device->channel, cmd->device->id,
1192 cmd->device->lun, /*alloc*/FALSE);
1194 ahd_unlock(ahd, &s);
1195 kfree(recovery_cmd);
1198 if ((scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX)) == NULL) {
1199 ahd_unlock(ahd, &s);
1200 kfree(recovery_cmd);
1203 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1204 cmd->device->id, &tstate);
1205 recovery_cmd->result = CAM_REQ_INPROG << 16;
1206 recovery_cmd->host_scribble = (char *)scb;
1207 scb->io_ctx = recovery_cmd;
1208 scb->platform_data->dev = dev;
1210 ahd_set_residual(scb, 0);
1211 ahd_set_sense_residual(scb, 0);
1214 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1215 hscb->lun = cmd->device->lun;
1217 hscb->task_management = SIU_TASKMGMT_LUN_RESET;
1218 scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
1219 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1220 scb->flags |= SCB_PACKETIZED;
1222 hscb->control |= MK_MESSAGE;
1226 dev->commands_issued++;
1227 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1228 ahd_queue_scb(ahd, scb);
1230 scb->platform_data->flags |= AHD_SCB_UP_EH_SEM;
1231 ahd_unlock(ahd, &s);
1233 timer.data = (u_long)scb;
1234 timer.expires = jiffies + (5 * HZ);
1235 timer.function = ahd_linux_sem_timeout;
1237 printf("Recovery code sleeping\n");
1238 down(&ahd->platform_data->eh_sem);
1239 printf("Recovery code awake\n");
1241 if (del_timer_sync(&timer) == 0) {
1242 printf("Timer Expired\n");
1246 ahd_linux_run_complete_queue(ahd);
1247 ahd_unlock(ahd, &s);
1248 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
1253 * Reset the SCSI bus.
1256 ahd_linux_bus_reset(Scsi_Cmnd *cmd)
1258 struct ahd_softc *ahd;
1262 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
1264 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
1265 printf("%s: Bus reset called for cmd %p\n",
1266 ahd_name(ahd), cmd);
1269 found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
1270 /*initiate reset*/TRUE);
1271 ahd_linux_run_complete_queue(ahd);
1272 ahd_unlock(ahd, &s);
1275 printf("%s: SCSI bus reset delivered. "
1276 "%d SCBs aborted.\n", ahd_name(ahd), found);
1281 Scsi_Host_Template aic79xx_driver_template = {
1282 .module = THIS_MODULE,
1284 .proc_info = ahd_linux_proc_info,
1285 .info = ahd_linux_info,
1286 .queuecommand = ahd_linux_queue,
1287 .eh_abort_handler = ahd_linux_abort,
1288 .eh_device_reset_handler = ahd_linux_dev_reset,
1289 .eh_bus_reset_handler = ahd_linux_bus_reset,
1290 #if defined(__i386__)
1291 .bios_param = ahd_linux_biosparam,
1293 .can_queue = AHD_MAX_QUEUE,
1296 .use_clustering = ENABLE_CLUSTERING,
1297 .slave_alloc = ahd_linux_slave_alloc,
1298 .slave_configure = ahd_linux_slave_configure,
1299 .slave_destroy = ahd_linux_slave_destroy,
1302 /******************************** Bus DMA *************************************/
1304 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
1305 bus_size_t alignment, bus_size_t boundary,
1306 dma_addr_t lowaddr, dma_addr_t highaddr,
1307 bus_dma_filter_t *filter, void *filterarg,
1308 bus_size_t maxsize, int nsegments,
1309 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
1313 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
1318 * Linux is very simplistic about DMA memory. For now don't
1319 * maintain all specification information. Once Linux supplies
1320 * better facilities for doing these operations, or the
1321 * needs of this particular driver change, we might need to do
1324 dmat->alignment = alignment;
1325 dmat->boundary = boundary;
1326 dmat->maxsize = maxsize;
1332 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
1334 free(dmat, M_DEVBUF);
1338 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
1339 int flags, bus_dmamap_t *mapp)
1343 map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
1347 * Although we can dma data above 4GB, our
1348 * "consistent" memory is below 4GB for
1349 * space efficiency reasons (only need a 4byte
1350 * address). For this reason, we have to reset
1351 * our dma mask when doing allocations.
1353 if (ahd->dev_softc != NULL)
1354 if (pci_set_dma_mask(ahd->dev_softc, 0xFFFFFFFF)) {
1355 printk(KERN_WARNING "aic79xx: No suitable DMA available.\n");
1359 *vaddr = pci_alloc_consistent(ahd->dev_softc,
1360 dmat->maxsize, &map->bus_addr);
1361 if (ahd->dev_softc != NULL)
1362 if (pci_set_dma_mask(ahd->dev_softc,
1363 ahd->platform_data->hw_dma_mask)) {
1364 printk(KERN_WARNING "aic79xx: No suitable DMA available.\n");
1375 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
1376 void* vaddr, bus_dmamap_t map)
1378 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
1379 vaddr, map->bus_addr);
1383 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
1384 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
1385 void *cb_arg, int flags)
1388 * Assume for now that this will only be used during
1389 * initialization and not for per-transaction buffer mapping.
1391 bus_dma_segment_t stack_sg;
1393 stack_sg.ds_addr = map->bus_addr;
1394 stack_sg.ds_len = dmat->maxsize;
1395 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
1400 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1403 * The map may is NULL in our < 2.3.X implementation.
1406 free(map, M_DEVBUF);
1410 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
1416 /********************* Platform Dependent Functions ***************************/
1418 * Compare "left hand" softc with "right hand" softc, returning:
1419 * < 0 - lahd has a lower priority than rahd
1420 * 0 - Softcs are equal
1421 * > 0 - lahd has a higher priority than rahd
1424 ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
1429 * Under Linux, cards are ordered as follows:
1430 * 1) PCI devices that are marked as the boot controller.
1431 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
1432 * 3) All remaining PCI devices sorted by bus/slot/func.
1435 value = (lahd->flags & AHD_BOOT_CHANNEL)
1436 - (rahd->flags & AHD_BOOT_CHANNEL);
1438 /* Controllers set for boot have a *higher* priority */
1442 value = (lahd->flags & AHD_BIOS_ENABLED)
1443 - (rahd->flags & AHD_BIOS_ENABLED);
1445 /* Controllers with BIOS enabled have a *higher* priority */
1448 /* Still equal. Sort by bus/slot/func. */
1449 if (aic79xx_reverse_scan != 0)
1450 value = ahd_get_pci_bus(lahd->dev_softc)
1451 - ahd_get_pci_bus(rahd->dev_softc);
1453 value = ahd_get_pci_bus(rahd->dev_softc)
1454 - ahd_get_pci_bus(lahd->dev_softc);
1457 if (aic79xx_reverse_scan != 0)
1458 value = ahd_get_pci_slot(lahd->dev_softc)
1459 - ahd_get_pci_slot(rahd->dev_softc);
1461 value = ahd_get_pci_slot(rahd->dev_softc)
1462 - ahd_get_pci_slot(lahd->dev_softc);
1466 value = rahd->channel - lahd->channel;
1471 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1474 if ((instance >= 0) && (targ >= 0)
1475 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
1476 && (targ < AHD_NUM_TARGETS)) {
1477 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1479 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1484 ahd_linux_setup_rd_strm_info(u_long arg, int instance, int targ, int32_t value)
1487 && (instance < NUM_ELEMENTS(aic79xx_rd_strm_info))) {
1488 aic79xx_rd_strm_info[instance] = value & 0xFFFF;
1490 printf("rd_strm[%d] = 0x%x\n", instance, value);
1495 ahd_linux_setup_dv(u_long arg, int instance, int targ, int32_t value)
1498 && (instance < NUM_ELEMENTS(aic79xx_dv_settings))) {
1499 aic79xx_dv_settings[instance] = value;
1501 printf("dv[%d] = %d\n", instance, value);
1506 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1510 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
1511 uint8_t *iocell_info;
1513 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1514 iocell_info[index] = value & 0xFFFF;
1516 printf("iocell[%d:%ld] = %d\n", instance, index, value);
1521 ahd_linux_setup_tag_info_global(char *p)
1525 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1526 printf("Setting Global Tags= %d\n", tags);
1528 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
1529 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1530 aic79xx_tag_info[i].tag_commands[j] = tags;
1536 * Handle Linux boot parameters. This routine allows for assigning a value
1537 * to a parameter with a ':' between the parameter and the value.
1538 * ie. aic79xx=stpwlev:1,extended
1541 aic79xx_setup(char *s)
1551 { "extended", &aic79xx_extended },
1552 { "no_reset", &aic79xx_no_reset },
1553 { "verbose", &aic79xx_verbose },
1554 { "allow_memio", &aic79xx_allow_memio},
1556 { "debug", &ahd_debug },
1558 { "reverse_scan", &aic79xx_reverse_scan },
1559 { "periodic_otag", &aic79xx_periodic_otag },
1560 { "pci_parity", &aic79xx_pci_parity },
1561 { "seltime", &aic79xx_seltime },
1562 { "tag_info", NULL },
1563 { "global_tag_depth", NULL},
1564 { "rd_strm", NULL },
1566 { "slewrate", NULL },
1567 { "precomp", NULL },
1568 { "amplitude", NULL },
1571 end = strchr(s, '\0');
1574 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1575 * will never be 0 in this case.
1579 while ((p = strsep(&s, ",.")) != NULL) {
1582 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1584 n = strlen(options[i].name);
1585 if (strncmp(options[i].name, p, n) == 0)
1588 if (i == NUM_ELEMENTS(options))
1591 if (strncmp(p, "global_tag_depth", n) == 0) {
1592 ahd_linux_setup_tag_info_global(p + n);
1593 } else if (strncmp(p, "tag_info", n) == 0) {
1594 s = aic_parse_brace_option("tag_info", p + n, end,
1595 2, ahd_linux_setup_tag_info, 0);
1596 } else if (strncmp(p, "rd_strm", n) == 0) {
1597 s = aic_parse_brace_option("rd_strm", p + n, end,
1598 1, ahd_linux_setup_rd_strm_info, 0);
1599 } else if (strncmp(p, "dv", n) == 0) {
1600 s = aic_parse_brace_option("dv", p + n, end, 1,
1601 ahd_linux_setup_dv, 0);
1602 } else if (strncmp(p, "slewrate", n) == 0) {
1603 s = aic_parse_brace_option("slewrate",
1604 p + n, end, 1, ahd_linux_setup_iocell_info,
1605 AIC79XX_SLEWRATE_INDEX);
1606 } else if (strncmp(p, "precomp", n) == 0) {
1607 s = aic_parse_brace_option("precomp",
1608 p + n, end, 1, ahd_linux_setup_iocell_info,
1609 AIC79XX_PRECOMP_INDEX);
1610 } else if (strncmp(p, "amplitude", n) == 0) {
1611 s = aic_parse_brace_option("amplitude",
1612 p + n, end, 1, ahd_linux_setup_iocell_info,
1613 AIC79XX_AMPLITUDE_INDEX);
1614 } else if (p[n] == ':') {
1615 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1616 } else if (!strncmp(p, "verbose", n)) {
1617 *(options[i].flag) = 1;
1619 *(options[i].flag) ^= 0xFFFFFFFF;
1625 __setup("aic79xx=", aic79xx_setup);
1627 uint32_t aic79xx_verbose;
1630 ahd_linux_register_host(struct ahd_softc *ahd, Scsi_Host_Template *template)
1633 struct Scsi_Host *host;
1638 template->name = ahd->description;
1639 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1643 *((struct ahd_softc **)host->hostdata) = ahd;
1645 scsi_assign_lock(host, &ahd->platform_data->spin_lock);
1646 ahd->platform_data->host = host;
1647 host->can_queue = AHD_MAX_QUEUE;
1648 host->cmd_per_lun = 2;
1649 host->sg_tablesize = AHD_NSEG;
1650 host->this_id = ahd->our_id;
1651 host->irq = ahd->platform_data->irq;
1652 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1653 host->max_lun = AHD_NUM_LUNS;
1654 host->max_channel = 0;
1655 host->sg_tablesize = AHD_NSEG;
1656 ahd_set_unit(ahd, ahd_linux_next_unit());
1657 sprintf(buf, "scsi%d", host->host_no);
1658 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1659 if (new_name != NULL) {
1660 strcpy(new_name, buf);
1661 ahd_set_name(ahd, new_name);
1663 host->unique_id = ahd->unit;
1664 ahd_linux_setup_user_rd_strm_settings(ahd);
1665 ahd_linux_initialize_scsi_bus(ahd);
1666 ahd_unlock(ahd, &s);
1667 ahd->platform_data->dv_pid = kernel_thread(ahd_linux_dv_thread, ahd, 0);
1669 if (ahd->platform_data->dv_pid < 0) {
1670 printf("%s: Failed to create DV thread, error= %d\n",
1671 ahd_name(ahd), ahd->platform_data->dv_pid);
1672 return (-ahd->platform_data->dv_pid);
1675 * Initially allocate *all* of our linux target objects
1676 * so that the DV thread will scan them all in parallel
1677 * just after driver initialization. Any device that
1678 * does not exist will have its target object destroyed
1679 * by the selection timeout handler. In the case of a
1680 * device that appears after the initial DV scan, async
1681 * negotiation will occur for the first command, and DV
1682 * will comence should that first command be successful.
1684 for (target = 0; target < host->max_id; target++) {
1687 * Skip our own ID. Some Compaq/HP storage devices
1688 * have enclosure management devices that respond to
1689 * single bit selection (i.e. selecting ourselves).
1690 * It is expected that either an external application
1691 * or a modified kernel will be used to probe this
1692 * ID if it is appropriate. To accommodate these
1693 * installations, ahc_linux_alloc_target() will allocate
1694 * for our ID if asked to do so.
1696 if (target == ahd->our_id)
1699 ahd_linux_alloc_target(ahd, 0, target);
1701 ahd_intr_enable(ahd, TRUE);
1702 ahd_linux_start_dv(ahd);
1703 ahd_unlock(ahd, &s);
1705 scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
1706 scsi_scan_host(host);
1711 ahd_linux_get_memsize(void)
1716 return ((uint64_t)si.totalram << PAGE_SHIFT);
1720 * Find the smallest available unit number to use
1721 * for a new device. We don't just use a static
1722 * count to handle the "repeated hot-(un)plug"
1726 ahd_linux_next_unit(void)
1728 struct ahd_softc *ahd;
1733 TAILQ_FOREACH(ahd, &ahd_tailq, links) {
1734 if (ahd->unit == unit) {
1743 * Place the SCSI bus into a known state by either resetting it,
1744 * or forcing transfer negotiations on the next command to any
1748 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1756 if (aic79xx_no_reset != 0)
1757 ahd->flags &= ~AHD_RESET_BUS_A;
1759 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1760 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1762 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1765 * Force negotiation to async for all targets that
1766 * will not see an initial bus reset.
1768 for (; target_id < numtarg; target_id++) {
1769 struct ahd_devinfo devinfo;
1770 struct ahd_initiator_tinfo *tinfo;
1771 struct ahd_tmode_tstate *tstate;
1773 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1774 target_id, &tstate);
1775 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1776 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1777 ahd_update_neg_request(ahd, &devinfo, tstate,
1778 tinfo, AHD_NEG_ALWAYS);
1780 /* Give the bus some time to recover */
1781 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1782 ahd_freeze_simq(ahd);
1783 init_timer(&ahd->platform_data->reset_timer);
1784 ahd->platform_data->reset_timer.data = (u_long)ahd;
1785 ahd->platform_data->reset_timer.expires =
1786 jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
1787 ahd->platform_data->reset_timer.function =
1788 (ahd_linux_callback_t *)ahd_release_simq;
1789 add_timer(&ahd->platform_data->reset_timer);
1794 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1796 ahd->platform_data =
1797 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1798 if (ahd->platform_data == NULL)
1800 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1801 TAILQ_INIT(&ahd->platform_data->completeq);
1802 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1803 ahd->platform_data->hw_dma_mask = 0xFFFFFFFF;
1805 ahd_done_lockinit(ahd);
1806 init_timer(&ahd->platform_data->completeq_timer);
1807 ahd->platform_data->completeq_timer.data = (u_long)ahd;
1808 ahd->platform_data->completeq_timer.function =
1809 (ahd_linux_callback_t *)ahd_linux_thread_run_complete_queue;
1810 init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
1811 init_MUTEX_LOCKED(&ahd->platform_data->dv_sem);
1812 init_MUTEX_LOCKED(&ahd->platform_data->dv_cmd_sem);
1813 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1818 ahd_platform_free(struct ahd_softc *ahd)
1820 struct ahd_linux_target *targ;
1821 struct ahd_linux_device *dev;
1824 if (ahd->platform_data != NULL) {
1825 del_timer_sync(&ahd->platform_data->completeq_timer);
1826 ahd_linux_kill_dv_thread(ahd);
1827 if (ahd->platform_data->host != NULL) {
1828 scsi_remove_host(ahd->platform_data->host);
1829 scsi_host_put(ahd->platform_data->host);
1832 /* destroy all of the device and target objects */
1833 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1834 targ = ahd->platform_data->targets[i];
1836 /* Keep target around through the loop. */
1838 for (j = 0; j < AHD_NUM_LUNS; j++) {
1840 if (targ->devices[j] == NULL)
1842 dev = targ->devices[j];
1843 ahd_linux_free_device(ahd, dev);
1846 * Forcibly free the target now that
1847 * all devices are gone.
1849 ahd_linux_free_target(ahd, targ);
1853 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1854 free_irq(ahd->platform_data->irq, ahd);
1855 if (ahd->tags[0] == BUS_SPACE_PIO
1856 && ahd->bshs[0].ioport != 0)
1857 release_region(ahd->bshs[0].ioport, 256);
1858 if (ahd->tags[1] == BUS_SPACE_PIO
1859 && ahd->bshs[1].ioport != 0)
1860 release_region(ahd->bshs[1].ioport, 256);
1861 if (ahd->tags[0] == BUS_SPACE_MEMIO
1862 && ahd->bshs[0].maddr != NULL) {
1863 iounmap(ahd->bshs[0].maddr);
1864 release_mem_region(ahd->platform_data->mem_busaddr,
1867 free(ahd->platform_data, M_DEVBUF);
1872 ahd_platform_init(struct ahd_softc *ahd)
1875 * Lookup and commit any modified IO Cell options.
1877 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1878 struct ahd_linux_iocell_opts *iocell_opts;
1880 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1881 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1882 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1883 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1884 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1885 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1886 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1892 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1894 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1895 SCB_GET_CHANNEL(ahd, scb),
1896 SCB_GET_LUN(scb), SCB_LIST_NULL,
1897 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1901 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1904 struct ahd_linux_device *dev;
1908 dev = ahd_linux_get_device(ahd, devinfo->channel - 'A',
1910 devinfo->lun, /*alloc*/FALSE);
1913 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1916 case AHD_QUEUE_NONE:
1919 case AHD_QUEUE_BASIC:
1920 now_queuing = AHD_DEV_Q_BASIC;
1922 case AHD_QUEUE_TAGGED:
1923 now_queuing = AHD_DEV_Q_TAGGED;
1926 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1927 && (was_queuing != now_queuing)
1928 && (dev->active != 0)) {
1929 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1933 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1937 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1940 * Start out agressively and allow our
1941 * dynamic queue depth algorithm to take
1944 dev->maxtags = usertags;
1945 dev->openings = dev->maxtags - dev->active;
1947 if (dev->maxtags == 0) {
1949 * Queueing is disabled by the user.
1952 } else if (alg == AHD_QUEUE_TAGGED) {
1953 dev->flags |= AHD_DEV_Q_TAGGED;
1954 if (aic79xx_periodic_otag != 0)
1955 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1957 dev->flags |= AHD_DEV_Q_BASIC;
1959 /* We can only have one opening. */
1961 dev->openings = 1 - dev->active;
1964 if (dev->scsi_device != NULL) {
1965 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1966 case AHD_DEV_Q_BASIC:
1967 scsi_adjust_queue_depth(dev->scsi_device,
1969 dev->openings + dev->active);
1971 case AHD_DEV_Q_TAGGED:
1972 scsi_adjust_queue_depth(dev->scsi_device,
1974 dev->openings + dev->active);
1978 * We allow the OS to queue 2 untagged transactions to
1979 * us at any time even though we can only execute them
1980 * serially on the controller/device. This should
1981 * remove some latency.
1983 scsi_adjust_queue_depth(dev->scsi_device,
1992 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1993 int lun, u_int tag, role_t role, uint32_t status)
1999 ahd_linux_thread_run_complete_queue(struct ahd_softc *ahd)
2003 ahd_lock(ahd, &flags);
2004 del_timer(&ahd->platform_data->completeq_timer);
2005 ahd->platform_data->flags &= ~AHD_RUN_CMPLT_Q_TIMER;
2006 ahd_linux_run_complete_queue(ahd);
2007 ahd_unlock(ahd, &flags);
2011 ahd_linux_start_dv(struct ahd_softc *ahd)
2015 * Freeze the simq and signal ahd_linux_queue to not let any
2016 * more commands through
2018 if ((ahd->platform_data->flags & AHD_DV_ACTIVE) == 0) {
2020 if (ahd_debug & AHD_SHOW_DV)
2021 printf("%s: Starting DV\n", ahd_name(ahd));
2024 ahd->platform_data->flags |= AHD_DV_ACTIVE;
2025 ahd_freeze_simq(ahd);
2027 /* Wake up the DV kthread */
2028 up(&ahd->platform_data->dv_sem);
2033 ahd_linux_dv_thread(void *data)
2035 struct ahd_softc *ahd;
2039 ahd = (struct ahd_softc *)data;
2042 if (ahd_debug & AHD_SHOW_DV)
2043 printf("In DV Thread\n");
2047 * Complete thread creation.
2051 daemonize("ahd_dv_%d", ahd->unit);
2052 current->flags |= PF_FREEZE;
2058 * Use down_interruptible() rather than down() to
2059 * avoid inclusion in the load average.
2061 down_interruptible(&ahd->platform_data->dv_sem);
2063 /* Check to see if we've been signaled to exit */
2065 if ((ahd->platform_data->flags & AHD_DV_SHUTDOWN) != 0) {
2066 ahd_unlock(ahd, &s);
2069 ahd_unlock(ahd, &s);
2072 if (ahd_debug & AHD_SHOW_DV)
2073 printf("%s: Beginning Domain Validation\n",
2078 * Wait for any pending commands to drain before proceeding.
2081 while (LIST_FIRST(&ahd->pending_scbs) != NULL) {
2082 ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_EMPTY;
2083 ahd_unlock(ahd, &s);
2084 down_interruptible(&ahd->platform_data->dv_sem);
2089 * Wait for the SIMQ to be released so that DV is the
2090 * only reason the queue is frozen.
2092 while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
2093 ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
2094 ahd_unlock(ahd, &s);
2095 down_interruptible(&ahd->platform_data->dv_sem);
2098 ahd_unlock(ahd, &s);
2100 for (target = 0; target < AHD_NUM_TARGETS; target++)
2101 ahd_linux_dv_target(ahd, target);
2104 ahd->platform_data->flags &= ~AHD_DV_ACTIVE;
2105 ahd_unlock(ahd, &s);
2108 * Release the SIMQ so that normal commands are
2109 * allowed to continue on the bus.
2111 ahd_release_simq(ahd);
2113 up(&ahd->platform_data->eh_sem);
2118 ahd_linux_kill_dv_thread(struct ahd_softc *ahd)
2123 if (ahd->platform_data->dv_pid != 0) {
2124 ahd->platform_data->flags |= AHD_DV_SHUTDOWN;
2125 ahd_unlock(ahd, &s);
2126 up(&ahd->platform_data->dv_sem);
2129 * Use the eh_sem as an indicator that the
2130 * dv thread is exiting. Note that the dv
2131 * thread must still return after performing
2132 * the up on our semaphore before it has
2133 * completely exited this module. Unfortunately,
2134 * there seems to be no easy way to wait for the
2135 * exit of a thread for which you are not the
2136 * parent (dv threads are parented by init).
2137 * Cross your fingers...
2139 down(&ahd->platform_data->eh_sem);
2142 * Mark the dv thread as already dead. This
2143 * avoids attempting to kill it a second time.
2144 * This is necessary because we must kill the
2145 * DV thread before calling ahd_free() in the
2146 * module shutdown case to avoid bogus locking
2147 * in the SCSI mid-layer, but we ahd_free() is
2148 * called without killing the DV thread in the
2149 * instance detach case, so ahd_platform_free()
2150 * calls us again to verify that the DV thread
2153 ahd->platform_data->dv_pid = 0;
2155 ahd_unlock(ahd, &s);
2159 #define AHD_LINUX_DV_INQ_SHORT_LEN 36
2160 #define AHD_LINUX_DV_INQ_LEN 256
2161 #define AHD_LINUX_DV_TIMEOUT (HZ / 4)
2163 #define AHD_SET_DV_STATE(ahd, targ, newstate) \
2164 ahd_set_dv_state(ahd, targ, newstate, __LINE__)
2166 static __inline void
2167 ahd_set_dv_state(struct ahd_softc *ahd, struct ahd_linux_target *targ,
2168 ahd_dv_state newstate, u_int line)
2170 ahd_dv_state oldstate;
2172 oldstate = targ->dv_state;
2174 if (ahd_debug & AHD_SHOW_DV)
2175 printf("%s:%d: Going from state %d to state %d\n",
2176 ahd_name(ahd), line, oldstate, newstate);
2179 if (oldstate == newstate)
2180 targ->dv_state_retry++;
2182 targ->dv_state_retry = 0;
2183 targ->dv_state = newstate;
2187 ahd_linux_dv_target(struct ahd_softc *ahd, u_int target_offset)
2189 struct ahd_devinfo devinfo;
2190 struct ahd_linux_target *targ;
2191 struct scsi_cmnd *cmd;
2192 struct scsi_device *scsi_dev;
2193 struct scsi_sense_data *sense;
2203 targ = ahd->platform_data->targets[target_offset];
2204 if (targ == NULL || (targ->flags & AHD_DV_REQUIRED) == 0) {
2205 ahd_unlock(ahd, &s);
2208 ahd_compile_devinfo(&devinfo, ahd->our_id, targ->target, /*lun*/0,
2209 targ->channel + 'A', ROLE_INITIATOR);
2211 if (ahd_debug & AHD_SHOW_DV) {
2212 ahd_print_devinfo(ahd, &devinfo);
2213 printf("Performing DV\n");
2217 ahd_unlock(ahd, &s);
2219 cmd = malloc(sizeof(struct scsi_cmnd), M_DEVBUF, M_WAITOK);
2220 scsi_dev = malloc(sizeof(struct scsi_device), M_DEVBUF, M_WAITOK);
2221 scsi_dev->host = ahd->platform_data->host;
2222 scsi_dev->id = devinfo.target;
2223 scsi_dev->lun = devinfo.lun;
2224 scsi_dev->channel = devinfo.channel - 'A';
2225 ahd->platform_data->dv_scsi_dev = scsi_dev;
2227 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_SHORT_ASYNC);
2229 while (targ->dv_state != AHD_DV_STATE_EXIT) {
2230 timeout = AHD_LINUX_DV_TIMEOUT;
2231 switch (targ->dv_state) {
2232 case AHD_DV_STATE_INQ_SHORT_ASYNC:
2233 case AHD_DV_STATE_INQ_ASYNC:
2234 case AHD_DV_STATE_INQ_ASYNC_VERIFY:
2236 * Set things to async narrow to reduce the
2237 * chance that the INQ will fail.
2240 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
2241 AHD_TRANS_GOAL, /*paused*/FALSE);
2242 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
2243 AHD_TRANS_GOAL, /*paused*/FALSE);
2244 ahd_unlock(ahd, &s);
2246 targ->flags &= ~AHD_INQ_VALID;
2248 case AHD_DV_STATE_INQ_VERIFY:
2252 if (targ->dv_state == AHD_DV_STATE_INQ_SHORT_ASYNC)
2253 inq_len = AHD_LINUX_DV_INQ_SHORT_LEN;
2255 inq_len = targ->inq_data->additional_length + 5;
2256 ahd_linux_dv_inq(ahd, cmd, &devinfo, targ, inq_len);
2259 case AHD_DV_STATE_TUR:
2260 case AHD_DV_STATE_BUSY:
2262 ahd_linux_dv_tur(ahd, cmd, &devinfo);
2264 case AHD_DV_STATE_REBD:
2265 ahd_linux_dv_rebd(ahd, cmd, &devinfo, targ);
2267 case AHD_DV_STATE_WEB:
2268 ahd_linux_dv_web(ahd, cmd, &devinfo, targ);
2271 case AHD_DV_STATE_REB:
2272 ahd_linux_dv_reb(ahd, cmd, &devinfo, targ);
2275 case AHD_DV_STATE_SU:
2276 ahd_linux_dv_su(ahd, cmd, &devinfo, targ);
2281 ahd_print_devinfo(ahd, &devinfo);
2282 printf("Unknown DV state %d\n", targ->dv_state);
2286 /* Queue the command and wait for it to complete */
2287 /* Abuse eh_timeout in the scsi_cmnd struct for our purposes */
2288 init_timer(&cmd->eh_timeout);
2290 if ((ahd_debug & AHD_SHOW_MESSAGES) != 0)
2292 * All of the printfs during negotiation
2293 * really slow down the negotiation.
2294 * Add a bit of time just to be safe.
2298 scsi_add_timer(cmd, timeout, ahd_linux_dv_timeout);
2300 * In 2.5.X, it is assumed that all calls from the
2301 * "midlayer" (which we are emulating) will have the
2302 * ahd host lock held. For other kernels, the
2303 * io_request_lock must be held.
2305 #if AHD_SCSI_HAS_HOST_LOCK != 0
2308 spin_lock_irqsave(&io_request_lock, s);
2310 ahd_linux_queue(cmd, ahd_linux_dv_complete);
2311 #if AHD_SCSI_HAS_HOST_LOCK != 0
2312 ahd_unlock(ahd, &s);
2314 spin_unlock_irqrestore(&io_request_lock, s);
2316 down_interruptible(&ahd->platform_data->dv_cmd_sem);
2318 * Wait for the SIMQ to be released so that DV is the
2319 * only reason the queue is frozen.
2322 while (AHD_DV_SIMQ_FROZEN(ahd) == 0) {
2323 ahd->platform_data->flags |= AHD_DV_WAIT_SIMQ_RELEASE;
2324 ahd_unlock(ahd, &s);
2325 down_interruptible(&ahd->platform_data->dv_sem);
2328 ahd_unlock(ahd, &s);
2330 ahd_linux_dv_transition(ahd, cmd, &devinfo, targ);
2334 if ((targ->flags & AHD_INQ_VALID) != 0
2335 && ahd_linux_get_device(ahd, devinfo.channel - 'A',
2336 devinfo.target, devinfo.lun,
2337 /*alloc*/FALSE) == NULL) {
2339 * The DV state machine failed to configure this device.
2340 * This is normal if DV is disabled. Since we have inquiry
2341 * data, filter it and use the "optimistic" negotiation
2342 * parameters found in the inquiry string.
2344 ahd_linux_filter_inquiry(ahd, &devinfo);
2345 if ((targ->flags & (AHD_BASIC_DV|AHD_ENHANCED_DV)) != 0) {
2346 ahd_print_devinfo(ahd, &devinfo);
2347 printf("DV failed to configure device. "
2348 "Please file a bug report against "
2354 free(cmd, M_DEVBUF);
2356 if (ahd->platform_data->dv_scsi_dev != NULL) {
2357 free(ahd->platform_data->dv_scsi_dev, M_DEVBUF);
2358 ahd->platform_data->dv_scsi_dev = NULL;
2362 if (targ->dv_buffer != NULL) {
2363 free(targ->dv_buffer, M_DEVBUF);
2364 targ->dv_buffer = NULL;
2366 if (targ->dv_buffer1 != NULL) {
2367 free(targ->dv_buffer1, M_DEVBUF);
2368 targ->dv_buffer1 = NULL;
2370 targ->flags &= ~AHD_DV_REQUIRED;
2371 if (targ->refcount == 0)
2372 ahd_linux_free_target(ahd, targ);
2373 ahd_unlock(ahd, &s);
2377 ahd_linux_dv_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
2383 retval = ahd_linux_fallback(ahd, devinfo);
2384 ahd_unlock(ahd, &s);
2390 ahd_linux_dv_transition(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
2391 struct ahd_devinfo *devinfo,
2392 struct ahd_linux_target *targ)
2396 status = aic_error_action(cmd, targ->inq_data,
2397 ahd_cmd_get_transaction_status(cmd),
2398 ahd_cmd_get_scsi_status(cmd));
2402 if (ahd_debug & AHD_SHOW_DV) {
2403 ahd_print_devinfo(ahd, devinfo);
2404 printf("Entering ahd_linux_dv_transition, state= %d, "
2405 "status= 0x%x, cmd->result= 0x%x\n", targ->dv_state,
2406 status, cmd->result);
2410 switch (targ->dv_state) {
2411 case AHD_DV_STATE_INQ_SHORT_ASYNC:
2412 case AHD_DV_STATE_INQ_ASYNC:
2413 switch (status & SS_MASK) {
2416 AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
2419 case SS_INQ_REFRESH:
2420 AHD_SET_DV_STATE(ahd, targ,
2421 AHD_DV_STATE_INQ_SHORT_ASYNC);
2425 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
2426 if (ahd_cmd_get_transaction_status(cmd)
2428 targ->dv_state_retry--;
2429 if ((status & SS_ERRMASK) == EBUSY)
2430 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
2431 if (targ->dv_state_retry < 10)
2435 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2437 if (ahd_debug & AHD_SHOW_DV) {
2438 ahd_print_devinfo(ahd, devinfo);
2439 printf("Failed DV inquiry, skipping\n");
2445 case AHD_DV_STATE_INQ_ASYNC_VERIFY:
2446 switch (status & SS_MASK) {
2452 if (memcmp(targ->inq_data, targ->dv_buffer,
2453 AHD_LINUX_DV_INQ_LEN) != 0) {
2455 * Inquiry data must have changed.
2456 * Try from the top again.
2458 AHD_SET_DV_STATE(ahd, targ,
2459 AHD_DV_STATE_INQ_SHORT_ASYNC);
2463 AHD_SET_DV_STATE(ahd, targ, targ->dv_state+1);
2464 targ->flags |= AHD_INQ_VALID;
2465 if (ahd_linux_user_dv_setting(ahd) == 0)
2468 xportflags = targ->inq_data->flags;
2469 if ((xportflags & (SID_Sync|SID_WBus16)) == 0)
2472 spi3data = targ->inq_data->spi3data;
2473 switch (spi3data & SID_SPI_CLOCK_DT_ST) {
2475 case SID_SPI_CLOCK_ST:
2476 /* Assume only basic DV is supported. */
2477 targ->flags |= AHD_BASIC_DV;
2479 case SID_SPI_CLOCK_DT:
2480 case SID_SPI_CLOCK_DT_ST:
2481 targ->flags |= AHD_ENHANCED_DV;
2486 case SS_INQ_REFRESH:
2487 AHD_SET_DV_STATE(ahd, targ,
2488 AHD_DV_STATE_INQ_SHORT_ASYNC);
2492 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
2493 if (ahd_cmd_get_transaction_status(cmd)
2495 targ->dv_state_retry--;
2497 if ((status & SS_ERRMASK) == EBUSY)
2498 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
2499 if (targ->dv_state_retry < 10)
2503 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2505 if (ahd_debug & AHD_SHOW_DV) {
2506 ahd_print_devinfo(ahd, devinfo);
2507 printf("Failed DV inquiry, skipping\n");
2513 case AHD_DV_STATE_INQ_VERIFY:
2514 switch (status & SS_MASK) {
2518 if (memcmp(targ->inq_data, targ->dv_buffer,
2519 AHD_LINUX_DV_INQ_LEN) == 0) {
2520 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2525 if (ahd_debug & AHD_SHOW_DV) {
2528 ahd_print_devinfo(ahd, devinfo);
2529 printf("Inquiry buffer mismatch:");
2530 for (i = 0; i < AHD_LINUX_DV_INQ_LEN; i++) {
2533 printf("0x%x:0x0%x ",
2534 ((uint8_t *)targ->inq_data)[i],
2535 targ->dv_buffer[i]);
2541 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
2542 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2546 * Do not count "falling back"
2547 * against our retries.
2549 targ->dv_state_retry = 0;
2550 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
2553 case SS_INQ_REFRESH:
2554 AHD_SET_DV_STATE(ahd, targ,
2555 AHD_DV_STATE_INQ_SHORT_ASYNC);
2559 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
2560 if (ahd_cmd_get_transaction_status(cmd)
2561 == CAM_REQUEUE_REQ) {
2562 targ->dv_state_retry--;
2563 } else if ((status & SSQ_FALLBACK) != 0) {
2564 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
2565 AHD_SET_DV_STATE(ahd, targ,
2570 * Do not count "falling back"
2571 * against our retries.
2573 targ->dv_state_retry = 0;
2574 } else if ((status & SS_ERRMASK) == EBUSY)
2575 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
2576 if (targ->dv_state_retry < 10)
2580 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2582 if (ahd_debug & AHD_SHOW_DV) {
2583 ahd_print_devinfo(ahd, devinfo);
2584 printf("Failed DV inquiry, skipping\n");
2591 case AHD_DV_STATE_TUR:
2592 switch (status & SS_MASK) {
2594 if ((targ->flags & AHD_BASIC_DV) != 0) {
2595 ahd_linux_filter_inquiry(ahd, devinfo);
2596 AHD_SET_DV_STATE(ahd, targ,
2597 AHD_DV_STATE_INQ_VERIFY);
2598 } else if ((targ->flags & AHD_ENHANCED_DV) != 0) {
2599 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REBD);
2601 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2606 if ((status & SS_ERRMASK) == EBUSY) {
2607 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_BUSY);
2610 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
2611 if (ahd_cmd_get_transaction_status(cmd)
2612 == CAM_REQUEUE_REQ) {
2613 targ->dv_state_retry--;
2614 } else if ((status & SSQ_FALLBACK) != 0) {
2615 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
2616 AHD_SET_DV_STATE(ahd, targ,
2621 * Do not count "falling back"
2622 * against our retries.
2624 targ->dv_state_retry = 0;
2626 if (targ->dv_state_retry >= 10) {
2628 if (ahd_debug & AHD_SHOW_DV) {
2629 ahd_print_devinfo(ahd, devinfo);
2630 printf("DV TUR reties exhausted\n");
2633 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2636 if (status & SSQ_DELAY)
2641 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_SU);
2643 case SS_INQ_REFRESH:
2644 AHD_SET_DV_STATE(ahd, targ,
2645 AHD_DV_STATE_INQ_SHORT_ASYNC);
2648 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2653 case AHD_DV_STATE_REBD:
2654 switch (status & SS_MASK) {
2659 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
2660 echo_size = scsi_3btoul(&targ->dv_buffer[1]);
2661 echo_size &= 0x1FFF;
2663 if (ahd_debug & AHD_SHOW_DV) {
2664 ahd_print_devinfo(ahd, devinfo);
2665 printf("Echo buffer size= %d\n", echo_size);
2668 if (echo_size == 0) {
2669 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2673 /* Generate the buffer pattern */
2674 targ->dv_echo_size = echo_size;
2675 ahd_linux_generate_dv_pattern(targ);
2677 * Setup initial negotiation values.
2679 ahd_linux_filter_inquiry(ahd, devinfo);
2682 case SS_INQ_REFRESH:
2683 AHD_SET_DV_STATE(ahd, targ,
2684 AHD_DV_STATE_INQ_SHORT_ASYNC);
2687 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
2688 if (ahd_cmd_get_transaction_status(cmd)
2690 targ->dv_state_retry--;
2691 if (targ->dv_state_retry <= 10)
2694 if (ahd_debug & AHD_SHOW_DV) {
2695 ahd_print_devinfo(ahd, devinfo);
2696 printf("DV REBD reties exhausted\n");
2703 * Setup initial negotiation values
2704 * and try level 1 DV.
2706 ahd_linux_filter_inquiry(ahd, devinfo);
2707 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_INQ_VERIFY);
2708 targ->dv_echo_size = 0;
2713 case AHD_DV_STATE_WEB:
2714 switch (status & SS_MASK) {
2716 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_REB);
2718 case SS_INQ_REFRESH:
2719 AHD_SET_DV_STATE(ahd, targ,
2720 AHD_DV_STATE_INQ_SHORT_ASYNC);
2723 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
2724 if (ahd_cmd_get_transaction_status(cmd)
2725 == CAM_REQUEUE_REQ) {
2726 targ->dv_state_retry--;
2727 } else if ((status & SSQ_FALLBACK) != 0) {
2728 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
2729 AHD_SET_DV_STATE(ahd, targ,
2734 * Do not count "falling back"
2735 * against our retries.
2737 targ->dv_state_retry = 0;
2739 if (targ->dv_state_retry <= 10)
2743 if (ahd_debug & AHD_SHOW_DV) {
2744 ahd_print_devinfo(ahd, devinfo);
2745 printf("DV WEB reties exhausted\n");
2749 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2754 case AHD_DV_STATE_REB:
2755 switch (status & SS_MASK) {
2757 if (memcmp(targ->dv_buffer, targ->dv_buffer1,
2758 targ->dv_echo_size) != 0) {
2759 if (ahd_linux_dv_fallback(ahd, devinfo) != 0)
2760 AHD_SET_DV_STATE(ahd, targ,
2763 AHD_SET_DV_STATE(ahd, targ,
2768 if (targ->dv_buffer != NULL) {
2769 free(targ->dv_buffer, M_DEVBUF);
2770 targ->dv_buffer = NULL;
2772 if (targ->dv_buffer1 != NULL) {
2773 free(targ->dv_buffer1, M_DEVBUF);
2774 targ->dv_buffer1 = NULL;
2776 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2778 case SS_INQ_REFRESH:
2779 AHD_SET_DV_STATE(ahd, targ,
2780 AHD_DV_STATE_INQ_SHORT_ASYNC);
2783 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
2784 if (ahd_cmd_get_transaction_status(cmd)
2785 == CAM_REQUEUE_REQ) {
2786 targ->dv_state_retry--;
2787 } else if ((status & SSQ_FALLBACK) != 0) {
2788 if (ahd_linux_dv_fallback(ahd, devinfo) != 0) {
2789 AHD_SET_DV_STATE(ahd, targ,
2793 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_WEB);
2795 if (targ->dv_state_retry <= 10) {
2796 if ((status & (SSQ_DELAY_RANDOM|SSQ_DELAY))!= 0)
2797 msleep(ahd->our_id*1000/10);
2801 if (ahd_debug & AHD_SHOW_DV) {
2802 ahd_print_devinfo(ahd, devinfo);
2803 printf("DV REB reties exhausted\n");
2808 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2813 case AHD_DV_STATE_SU:
2814 switch (status & SS_MASK) {
2816 case SS_INQ_REFRESH:
2817 AHD_SET_DV_STATE(ahd, targ,
2818 AHD_DV_STATE_INQ_SHORT_ASYNC);
2821 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2826 case AHD_DV_STATE_BUSY:
2827 switch (status & SS_MASK) {
2829 case SS_INQ_REFRESH:
2830 AHD_SET_DV_STATE(ahd, targ,
2831 AHD_DV_STATE_INQ_SHORT_ASYNC);
2835 AHD_SET_DV_STATE(ahd, targ, targ->dv_state);
2836 if (ahd_cmd_get_transaction_status(cmd)
2837 == CAM_REQUEUE_REQ) {
2838 targ->dv_state_retry--;
2839 } else if (targ->dv_state_retry < 60) {
2840 if ((status & SSQ_DELAY) != 0)
2844 if (ahd_debug & AHD_SHOW_DV) {
2845 ahd_print_devinfo(ahd, devinfo);
2846 printf("DV BUSY reties exhausted\n");
2849 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2853 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2859 printf("%s: Invalid DV completion state %d\n", ahd_name(ahd),
2861 AHD_SET_DV_STATE(ahd, targ, AHD_DV_STATE_EXIT);
2867 ahd_linux_dv_fill_cmd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
2868 struct ahd_devinfo *devinfo)
2870 memset(cmd, 0, sizeof(struct scsi_cmnd));
2871 cmd->device = ahd->platform_data->dv_scsi_dev;
2872 cmd->scsi_done = ahd_linux_dv_complete;
2876 * Synthesize an inquiry command. On the return trip, it'll be
2877 * sniffed and the device transfer settings set for us.
2880 ahd_linux_dv_inq(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
2881 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ,
2882 u_int request_length)
2886 if (ahd_debug & AHD_SHOW_DV) {
2887 ahd_print_devinfo(ahd, devinfo);
2888 printf("Sending INQ\n");
2891 if (targ->inq_data == NULL)
2892 targ->inq_data = malloc(AHD_LINUX_DV_INQ_LEN,
2893 M_DEVBUF, M_WAITOK);
2894 if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC) {
2895 if (targ->dv_buffer != NULL)
2896 free(targ->dv_buffer, M_DEVBUF);
2897 targ->dv_buffer = malloc(AHD_LINUX_DV_INQ_LEN,
2898 M_DEVBUF, M_WAITOK);
2901 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
2902 cmd->sc_data_direction = DMA_FROM_DEVICE;
2904 cmd->cmnd[0] = INQUIRY;
2905 cmd->cmnd[4] = request_length;
2906 cmd->request_bufflen = request_length;
2907 if (targ->dv_state > AHD_DV_STATE_INQ_ASYNC)
2908 cmd->request_buffer = targ->dv_buffer;
2910 cmd->request_buffer = targ->inq_data;
2911 memset(cmd->request_buffer, 0, AHD_LINUX_DV_INQ_LEN);
2915 ahd_linux_dv_tur(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
2916 struct ahd_devinfo *devinfo)
2920 if (ahd_debug & AHD_SHOW_DV) {
2921 ahd_print_devinfo(ahd, devinfo);
2922 printf("Sending TUR\n");
2925 /* Do a TUR to clear out any non-fatal transitional state */
2926 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
2927 cmd->sc_data_direction = DMA_NONE;
2929 cmd->cmnd[0] = TEST_UNIT_READY;
2932 #define AHD_REBD_LEN 4
2935 ahd_linux_dv_rebd(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
2936 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
2940 if (ahd_debug & AHD_SHOW_DV) {
2941 ahd_print_devinfo(ahd, devinfo);
2942 printf("Sending REBD\n");
2945 if (targ->dv_buffer != NULL)
2946 free(targ->dv_buffer, M_DEVBUF);
2947 targ->dv_buffer = malloc(AHD_REBD_LEN, M_DEVBUF, M_WAITOK);
2948 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
2949 cmd->sc_data_direction = DMA_FROM_DEVICE;
2951 cmd->cmnd[0] = READ_BUFFER;
2952 cmd->cmnd[1] = 0x0b;
2953 scsi_ulto3b(AHD_REBD_LEN, &cmd->cmnd[6]);
2954 cmd->request_bufflen = AHD_REBD_LEN;
2955 cmd->underflow = cmd->request_bufflen;
2956 cmd->request_buffer = targ->dv_buffer;
2960 ahd_linux_dv_web(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
2961 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
2965 if (ahd_debug & AHD_SHOW_DV) {
2966 ahd_print_devinfo(ahd, devinfo);
2967 printf("Sending WEB\n");
2970 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
2971 cmd->sc_data_direction = DMA_TO_DEVICE;
2973 cmd->cmnd[0] = WRITE_BUFFER;
2974 cmd->cmnd[1] = 0x0a;
2975 scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
2976 cmd->request_bufflen = targ->dv_echo_size;
2977 cmd->underflow = cmd->request_bufflen;
2978 cmd->request_buffer = targ->dv_buffer;
2982 ahd_linux_dv_reb(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
2983 struct ahd_devinfo *devinfo, struct ahd_linux_target *targ)
2987 if (ahd_debug & AHD_SHOW_DV) {
2988 ahd_print_devinfo(ahd, devinfo);
2989 printf("Sending REB\n");
2992 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
2993 cmd->sc_data_direction = DMA_FROM_DEVICE;
2995 cmd->cmnd[0] = READ_BUFFER;
2996 cmd->cmnd[1] = 0x0a;
2997 scsi_ulto3b(targ->dv_echo_size, &cmd->cmnd[6]);
2998 cmd->request_bufflen = targ->dv_echo_size;
2999 cmd->underflow = cmd->request_bufflen;
3000 cmd->request_buffer = targ->dv_buffer1;
3004 ahd_linux_dv_su(struct ahd_softc *ahd, struct scsi_cmnd *cmd,
3005 struct ahd_devinfo *devinfo,
3006 struct ahd_linux_target *targ)
3010 le = SID_IS_REMOVABLE(targ->inq_data) ? SSS_LOEJ : 0;
3013 if (ahd_debug & AHD_SHOW_DV) {
3014 ahd_print_devinfo(ahd, devinfo);
3015 printf("Sending SU\n");
3018 ahd_linux_dv_fill_cmd(ahd, cmd, devinfo);
3019 cmd->sc_data_direction = DMA_NONE;
3021 cmd->cmnd[0] = START_STOP_UNIT;
3022 cmd->cmnd[4] = le | SSS_START;
3026 ahd_linux_fallback(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
3028 struct ahd_linux_target *targ;
3029 struct ahd_initiator_tinfo *tinfo;
3030 struct ahd_transinfo *goal;
3031 struct ahd_tmode_tstate *tstate;
3039 u_int fallback_speed;
3042 if (ahd_debug & AHD_SHOW_DV) {
3043 ahd_print_devinfo(ahd, devinfo);
3044 printf("Trying to fallback\n");
3047 targ = ahd->platform_data->targets[devinfo->target_offset];
3048 tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
3049 devinfo->our_scsiid,
3050 devinfo->target, &tstate);
3051 goal = &tinfo->goal;
3052 width = goal->width;
3053 period = goal->period;
3054 offset = goal->offset;
3055 ppr_options = goal->ppr_options;
3057 period = AHD_ASYNC_XFER_PERIOD;
3058 if (targ->dv_next_narrow_period == 0)
3059 targ->dv_next_narrow_period = MAX(period, AHD_SYNCRATE_ULTRA2);
3060 if (targ->dv_next_wide_period == 0)
3061 targ->dv_next_wide_period = period;
3062 if (targ->dv_max_width == 0)
3063 targ->dv_max_width = width;
3064 if (targ->dv_max_ppr_options == 0)
3065 targ->dv_max_ppr_options = ppr_options;
3066 if (targ->dv_last_ppr_options == 0)
3067 targ->dv_last_ppr_options = ppr_options;
3069 cur_speed = aic_calc_speed(width, period, offset, AHD_SYNCRATE_MIN);
3070 wide_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT,
3071 targ->dv_next_wide_period,
3072 MAX_OFFSET, AHD_SYNCRATE_MIN);
3073 narrow_speed = aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT,
3074 targ->dv_next_narrow_period,
3075 MAX_OFFSET, AHD_SYNCRATE_MIN);
3076 fallback_speed = aic_calc_speed(width, period+1, offset,
3079 if (ahd_debug & AHD_SHOW_DV) {
3080 printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, "
3081 "fallback_speed= %d\n", cur_speed, wide_speed,
3082 narrow_speed, fallback_speed);
3086 if (cur_speed > 160000) {
3088 * Paced/DT/IU_REQ only transfer speeds. All we
3089 * can do is fallback in terms of syncrate.
3092 } else if (cur_speed > 80000) {
3093 if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
3095 * Try without IU_REQ as it may be confusing
3098 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
3101 * Paced/DT only transfer speeds. All we
3102 * can do is fallback in terms of syncrate.
3105 ppr_options = targ->dv_max_ppr_options;
3107 } else if (cur_speed > 3300) {
3110 * In this range we the following
3111 * options ordered from highest to
3112 * lowest desireability:
3116 * o Narrow at a potentally higher sync rate.
3118 * All modes are tested with and without IU_REQ
3119 * set since using IUs may confuse an expander.
3121 if ((ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
3123 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
3124 } else if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) {
3128 ppr_options = targ->dv_max_ppr_options;
3129 ppr_options &= ~MSG_EXT_PPR_DT_REQ;
3130 } else if (targ->dv_last_ppr_options != 0) {
3132 * Try without QAS or any other PPR options.
3133 * We may need a non-PPR message to work with
3134 * an expander. We look at the "last PPR options"
3135 * so we will perform this fallback even if the
3136 * target responded to our PPR negotiation with
3137 * no option bits set.
3140 } else if (width == MSG_EXT_WDTR_BUS_16_BIT) {
3142 * If the next narrow speed is greater than
3143 * the next wide speed, fallback to narrow.
3144 * Otherwise fallback to the next DT/Wide setting.
3145 * The narrow async speed will always be smaller
3146 * than the wide async speed, so handle this case
3149 ppr_options = targ->dv_max_ppr_options;
3150 if (narrow_speed > fallback_speed
3151 || period >= AHD_ASYNC_XFER_PERIOD) {
3152 targ->dv_next_wide_period = period+1;
3153 width = MSG_EXT_WDTR_BUS_8_BIT;
3154 period = targ->dv_next_narrow_period;
3158 } else if ((ahd->features & AHD_WIDE) != 0
3159 && targ->dv_max_width != 0
3160 && wide_speed >= fallback_speed
3161 && (targ->dv_next_wide_period <= AHD_ASYNC_XFER_PERIOD
3162 || period >= AHD_ASYNC_XFER_PERIOD)) {
3165 * We are narrow. Try falling back
3166 * to the next wide speed with
3167 * all supported ppr options set.
3169 targ->dv_next_narrow_period = period+1;
3170 width = MSG_EXT_WDTR_BUS_16_BIT;
3171 period = targ->dv_next_wide_period;
3172 ppr_options = targ->dv_max_ppr_options;
3174 /* Only narrow fallback is allowed. */
3176 ppr_options = targ->dv_max_ppr_options;
3181 offset = MAX_OFFSET;
3182 ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_PACED);
3183 ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, FALSE);
3188 if (width == MSG_EXT_WDTR_BUS_8_BIT)
3189 targ->dv_next_narrow_period = AHD_ASYNC_XFER_PERIOD;
3191 targ->dv_next_wide_period = AHD_ASYNC_XFER_PERIOD;
3193 ahd_set_syncrate(ahd, devinfo, period, offset,
3194 ppr_options, AHD_TRANS_GOAL, FALSE);
3195 targ->dv_last_ppr_options = ppr_options;
3200 ahd_linux_dv_timeout(struct scsi_cmnd *cmd)
3202 struct ahd_softc *ahd;
3206 ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
3207 ahd_lock(ahd, &flags);
3210 if (ahd_debug & AHD_SHOW_DV) {
3211 printf("%s: Timeout while doing DV command %x.\n",
3212 ahd_name(ahd), cmd->cmnd[0]);
3213 ahd_dump_card_state(ahd);
3218 * Guard against "done race". No action is
3219 * required if we just completed.
3221 if ((scb = (struct scb *)cmd->host_scribble) == NULL) {
3222 ahd_unlock(ahd, &flags);
3227 * Command has not completed. Mark this
3228 * SCB as having failing status prior to
3229 * resetting the bus, so we get the correct
3232 if ((scb->flags & SCB_SENSE) != 0)
3233 ahd_set_transaction_status(scb, CAM_AUTOSENSE_FAIL);
3235 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
3236 ahd_reset_channel(ahd, cmd->device->channel + 'A', /*initiate*/TRUE);
3239 * Add a minimal bus settle delay for devices that are slow to
3240 * respond after bus resets.
3242 ahd_freeze_simq(ahd);
3243 init_timer(&ahd->platform_data->reset_timer);
3244 ahd->platform_data->reset_timer.data = (u_long)ahd;
3245 ahd->platform_data->reset_timer.expires = jiffies + HZ / 2;
3246 ahd->platform_data->reset_timer.function =
3247 (ahd_linux_callback_t *)ahd_release_simq;
3248 add_timer(&ahd->platform_data->reset_timer);
3249 ahd_linux_run_complete_queue(ahd);
3250 ahd_unlock(ahd, &flags);
3254 ahd_linux_dv_complete(struct scsi_cmnd *cmd)
3256 struct ahd_softc *ahd;
3258 ahd = *((struct ahd_softc **)cmd->device->host->hostdata);
3260 /* Delete the DV timer before it goes off! */
3261 scsi_delete_timer(cmd);
3264 if (ahd_debug & AHD_SHOW_DV)
3265 printf("%s:%c:%d: Command completed, status= 0x%x\n",
3266 ahd_name(ahd), cmd->device->channel, cmd->device->id,
3270 /* Wake up the state machine */
3271 up(&ahd->platform_data->dv_cmd_sem);
3275 ahd_linux_generate_dv_pattern(struct ahd_linux_target *targ)
3281 if (targ->dv_buffer != NULL)
3282 free(targ->dv_buffer, M_DEVBUF);
3283 targ->dv_buffer = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
3284 if (targ->dv_buffer1 != NULL)
3285 free(targ->dv_buffer1, M_DEVBUF);
3286 targ->dv_buffer1 = malloc(targ->dv_echo_size, M_DEVBUF, M_WAITOK);
3291 for (j = 0 ; i < targ->dv_echo_size; j++) {
3294 * 32bytes of sequential numbers.
3296 targ->dv_buffer[i++] = j & 0xff;
3297 } else if (j < 48) {
3299 * 32bytes of repeating 0x0000, 0xffff.
3301 targ->dv_buffer[i++] = (j & 0x02) ? 0xff : 0x00;
3302 } else if (j < 64) {
3304 * 32bytes of repeating 0x5555, 0xaaaa.
3306 targ->dv_buffer[i++] = (j & 0x02) ? 0xaa : 0x55;
3309 * Remaining buffer is filled with a repeating
3313 * ~0x0001 << shifted once in each loop.
3317 targ->dv_buffer[i++] = ~(b >> 8) & 0xff;
3322 targ->dv_buffer[i++] = (~b & 0xff);
3325 targ->dv_buffer[i++] = 0xff;
3332 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
3334 static int warned_user;
3338 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
3339 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
3341 if (warned_user == 0) {
3343 "aic79xx: WARNING: Insufficient tag_info instances\n"
3344 "aic79xx: for installed controllers. Using defaults\n"
3345 "aic79xx: Please update the aic79xx_tag_info array in\n"
3346 "aic79xx: the aic79xx_osm.c source file.\n");
3349 tags = AHD_MAX_QUEUE;
3351 adapter_tag_info_t *tag_info;
3353 tag_info = &aic79xx_tag_info[ahd->unit];
3354 tags = tag_info->tag_commands[devinfo->target_offset];
3355 if (tags > AHD_MAX_QUEUE)
3356 tags = AHD_MAX_QUEUE;
3363 ahd_linux_user_dv_setting(struct ahd_softc *ahd)
3365 static int warned_user;
3368 if (ahd->unit >= NUM_ELEMENTS(aic79xx_dv_settings)) {
3370 if (warned_user == 0) {
3372 "aic79xx: WARNING: Insufficient dv settings instances\n"
3373 "aic79xx: for installed controllers. Using defaults\n"
3374 "aic79xx: Please update the aic79xx_dv_settings array in"
3375 "aic79xx: the aic79xx_osm.c source file.\n");
3381 dv = aic79xx_dv_settings[ahd->unit];
3386 * Apply the default.
3389 if (ahd->seep_config != 0)
3390 dv = (ahd->seep_config->bios_control & CFENABLEDV);
3396 ahd_linux_setup_user_rd_strm_settings(struct ahd_softc *ahd)
3398 static int warned_user;
3403 * If we have specific read streaming info for this controller,
3404 * apply it. Otherwise use the defaults.
3406 if (ahd->unit >= NUM_ELEMENTS(aic79xx_rd_strm_info)) {
3408 if (warned_user == 0) {
3411 "aic79xx: WARNING: Insufficient rd_strm instances\n"
3412 "aic79xx: for installed controllers. Using defaults\n"
3413 "aic79xx: Please update the aic79xx_rd_strm_info array\n"
3414 "aic79xx: in the aic79xx_osm.c source file.\n");
3417 rd_strm_mask = AIC79XX_CONFIGED_RD_STRM;
3420 rd_strm_mask = aic79xx_rd_strm_info[ahd->unit];
3422 for (target_id = 0; target_id < 16; target_id++) {
3423 struct ahd_devinfo devinfo;
3424 struct ahd_initiator_tinfo *tinfo;
3425 struct ahd_tmode_tstate *tstate;
3427 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
3428 target_id, &tstate);
3429 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
3430 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
3431 tinfo->user.ppr_options &= ~MSG_EXT_PPR_RD_STRM;
3432 if ((rd_strm_mask & devinfo.target_mask) != 0)
3433 tinfo->user.ppr_options |= MSG_EXT_PPR_RD_STRM;
3438 * Determines the queue depth for a given device.
3441 ahd_linux_device_queue_depth(struct ahd_softc *ahd,
3442 struct ahd_linux_device *dev)
3444 struct ahd_devinfo devinfo;
3447 ahd_compile_devinfo(&devinfo,
3449 dev->target->target, dev->lun,
3450 dev->target->channel == 0 ? 'A' : 'B',
3452 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
3454 && dev->scsi_device != NULL
3455 && dev->scsi_device->tagged_supported != 0) {
3457 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
3458 ahd_print_devinfo(ahd, &devinfo);
3459 printf("Tagged Queuing enabled. Depth %d\n", tags);
3461 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
3466 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
3467 struct scsi_cmnd *cmd)
3470 struct hardware_scb *hscb;
3471 struct ahd_initiator_tinfo *tinfo;
3472 struct ahd_tmode_tstate *tstate;
3477 * Get an scb to use.
3479 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
3480 cmd->device->id, &tstate);
3481 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
3482 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
3483 col_idx = AHD_NEVER_COL_IDX;
3485 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
3488 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
3489 ahd->flags |= AHD_RESOURCE_SHORTAGE;
3490 return SCSI_MLQUEUE_HOST_BUSY;
3494 scb->platform_data->dev = dev;
3496 cmd->host_scribble = (char *)scb;
3499 * Fill out basics of the HSCB.
3502 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
3503 hscb->lun = cmd->device->lun;
3504 scb->hscb->task_management = 0;
3505 mask = SCB_GET_TARGET_MASK(ahd, scb);
3507 if ((ahd->user_discenable & mask) != 0)
3508 hscb->control |= DISCENB;
3510 if (AHD_DV_CMD(cmd) != 0)
3511 scb->flags |= SCB_SILENT;
3513 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
3514 scb->flags |= SCB_PACKETIZED;
3516 if ((tstate->auto_negotiate & mask) != 0) {
3517 scb->flags |= SCB_AUTO_NEGOTIATE;
3518 scb->hscb->control |= MK_MESSAGE;
3521 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
3523 uint8_t tag_msgs[2];
3525 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
3526 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
3527 hscb->control |= tag_msgs[0];
3528 if (tag_msgs[0] == MSG_ORDERED_TASK)
3529 dev->commands_since_idle_or_otag = 0;
3531 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
3532 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
3533 hscb->control |= MSG_ORDERED_TASK;
3534 dev->commands_since_idle_or_otag = 0;
3536 hscb->control |= MSG_SIMPLE_TASK;
3540 hscb->cdb_len = cmd->cmd_len;
3541 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
3544 ahd_set_residual(scb, 0);
3545 ahd_set_sense_residual(scb, 0);
3546 if (cmd->use_sg != 0) {
3548 struct scatterlist *cur_seg;
3552 cur_seg = (struct scatterlist *)cmd->request_buffer;
3553 dir = cmd->sc_data_direction;
3554 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
3556 scb->platform_data->xfer_len = 0;
3557 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
3561 addr = sg_dma_address(cur_seg);
3562 len = sg_dma_len(cur_seg);
3563 scb->platform_data->xfer_len += len;
3564 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
3567 } else if (cmd->request_bufflen != 0) {
3573 dir = cmd->sc_data_direction;
3574 addr = pci_map_single(ahd->dev_softc,
3575 cmd->request_buffer,
3576 cmd->request_bufflen, dir);
3577 scb->platform_data->xfer_len = cmd->request_bufflen;
3578 scb->platform_data->buf_busaddr = addr;
3579 sg = ahd_sg_setup(ahd, scb, sg, addr,
3580 cmd->request_bufflen, /*last*/TRUE);
3583 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
3586 dev->commands_issued++;
3588 /* Update the error counting bucket and dump if needed */
3589 if (dev->target->cmds_since_error) {
3590 dev->target->cmds_since_error++;
3591 if (dev->target->cmds_since_error >
3592 AHD_LINUX_ERR_THRESH)
3593 dev->target->cmds_since_error = 0;
3596 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
3597 dev->commands_since_idle_or_otag++;
3598 scb->flags |= SCB_ACTIVE;
3599 ahd_queue_scb(ahd, scb);
3605 * SCSI controller interrupt handler.
3608 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
3610 struct ahd_softc *ahd;
3614 ahd = (struct ahd_softc *) dev_id;
3615 ahd_lock(ahd, &flags);
3616 ours = ahd_intr(ahd);
3617 ahd_linux_run_complete_queue(ahd);
3618 ahd_unlock(ahd, &flags);
3619 return IRQ_RETVAL(ours);
3623 ahd_platform_flushwork(struct ahd_softc *ahd)
3626 while (ahd_linux_run_complete_queue(ahd) != NULL)
3630 static struct ahd_linux_target*
3631 ahd_linux_alloc_target(struct ahd_softc *ahd, u_int channel, u_int target)
3633 struct ahd_linux_target *targ;
3635 targ = malloc(sizeof(*targ), M_DEVBUF, M_NOWAIT);
3638 memset(targ, 0, sizeof(*targ));
3639 targ->channel = channel;
3640 targ->target = target;
3642 targ->flags = AHD_DV_REQUIRED;
3643 ahd->platform_data->targets[target] = targ;
3648 ahd_linux_free_target(struct ahd_softc *ahd, struct ahd_linux_target *targ)
3650 struct ahd_devinfo devinfo;
3651 struct ahd_initiator_tinfo *tinfo;
3652 struct ahd_tmode_tstate *tstate;
3654 u_int target_offset;
3658 * Force a negotiation to async/narrow on any
3659 * future command to this device unless a bus
3660 * reset occurs between now and that command.
3662 channel = 'A' + targ->channel;
3663 our_id = ahd->our_id;
3664 target_offset = targ->target;
3665 tinfo = ahd_fetch_transinfo(ahd, channel, our_id,
3666 targ->target, &tstate);
3667 ahd_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD,
3668 channel, ROLE_INITIATOR);
3669 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
3670 AHD_TRANS_GOAL, /*paused*/FALSE);
3671 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
3672 AHD_TRANS_GOAL, /*paused*/FALSE);
3673 ahd_update_neg_request(ahd, &devinfo, tstate, tinfo, AHD_NEG_ALWAYS);
3674 ahd->platform_data->targets[target_offset] = NULL;
3675 if (targ->inq_data != NULL)
3676 free(targ->inq_data, M_DEVBUF);
3677 if (targ->dv_buffer != NULL)
3678 free(targ->dv_buffer, M_DEVBUF);
3679 if (targ->dv_buffer1 != NULL)
3680 free(targ->dv_buffer1, M_DEVBUF);
3681 free(targ, M_DEVBUF);
3684 static struct ahd_linux_device*
3685 ahd_linux_alloc_device(struct ahd_softc *ahd,
3686 struct ahd_linux_target *targ, u_int lun)
3688 struct ahd_linux_device *dev;
3690 dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
3693 memset(dev, 0, sizeof(*dev));
3694 init_timer(&dev->timer);
3695 dev->flags = AHD_DEV_UNCONFIGURED;
3700 * We start out life using untagged
3701 * transactions of which we allow one.
3706 * Set maxtags to 0. This will be changed if we
3707 * later determine that we are dealing with
3708 * a tagged queuing capable device.
3713 targ->devices[lun] = dev;
3718 ahd_linux_free_device(struct ahd_softc *ahd, struct ahd_linux_device *dev)
3720 struct ahd_linux_target *targ;
3722 del_timer(&dev->timer);
3724 targ->devices[dev->lun] = NULL;
3725 free(dev, M_DEVBUF);
3727 if (targ->refcount == 0
3728 && (targ->flags & AHD_DV_REQUIRED) == 0)
3729 ahd_linux_free_target(ahd, targ);
3733 ahd_send_async(struct ahd_softc *ahd, char channel,
3734 u_int target, u_int lun, ac_code code, void *arg)
3737 case AC_TRANSFER_NEG:
3740 struct ahd_linux_target *targ;
3741 struct info_str info;
3742 struct ahd_initiator_tinfo *tinfo;
3743 struct ahd_tmode_tstate *tstate;
3746 info.length = sizeof(buf);
3749 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
3753 * Don't bother reporting results while
3754 * negotiations are still pending.
3756 if (tinfo->curr.period != tinfo->goal.period
3757 || tinfo->curr.width != tinfo->goal.width
3758 || tinfo->curr.offset != tinfo->goal.offset
3759 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
3760 if (bootverbose == 0)
3764 * Don't bother reporting results that
3765 * are identical to those last reported.
3767 targ = ahd->platform_data->targets[target];
3770 if (tinfo->curr.period == targ->last_tinfo.period
3771 && tinfo->curr.width == targ->last_tinfo.width
3772 && tinfo->curr.offset == targ->last_tinfo.offset
3773 && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
3774 if (bootverbose == 0)
3777 targ->last_tinfo.period = tinfo->curr.period;
3778 targ->last_tinfo.width = tinfo->curr.width;
3779 targ->last_tinfo.offset = tinfo->curr.offset;
3780 targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
3782 printf("(%s:%c:", ahd_name(ahd), channel);
3783 if (target == CAM_TARGET_WILDCARD)
3786 printf("%d): ", target);
3787 ahd_format_transinfo(&info, &tinfo->curr);
3788 if (info.pos < info.length)
3789 *info.buffer = '\0';
3791 buf[info.length - 1] = '\0';
3797 WARN_ON(lun != CAM_LUN_WILDCARD);
3798 scsi_report_device_reset(ahd->platform_data->host,
3799 channel - 'A', target);
3803 if (ahd->platform_data->host != NULL) {
3804 scsi_report_bus_reset(ahd->platform_data->host,
3809 panic("ahd_send_async: Unexpected async event");
3814 * Calls the higher level scsi done function and frees the scb.
3817 ahd_done(struct ahd_softc *ahd, struct scb *scb)
3820 struct ahd_linux_device *dev;
3822 if ((scb->flags & SCB_ACTIVE) == 0) {
3823 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
3824 ahd_dump_card_state(ahd);
3825 panic("Stopping for safety");
3827 LIST_REMOVE(scb, pending_links);
3829 dev = scb->platform_data->dev;
3832 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
3833 cmd->result &= ~(CAM_DEV_QFRZN << 16);
3836 ahd_linux_unmap_scb(ahd, scb);
3839 * Guard against stale sense data.
3840 * The Linux mid-layer assumes that sense
3841 * was retrieved anytime the first byte of
3842 * the sense buffer looks "sane".
3844 cmd->sense_buffer[0] = 0;
3845 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
3846 uint32_t amount_xferred;
3849 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
3850 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
3852 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
3853 ahd_print_path(ahd, scb);
3854 printf("Set CAM_UNCOR_PARITY\n");
3857 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
3858 #ifdef AHD_REPORT_UNDERFLOWS
3860 * This code is disabled by default as some
3861 * clients of the SCSI system do not properly
3862 * initialize the underflow parameter. This
3863 * results in spurious termination of commands
3864 * that complete as expected (e.g. underflow is
3865 * allowed as command can return variable amounts
3868 } else if (amount_xferred < scb->io_ctx->underflow) {
3871 ahd_print_path(ahd, scb);
3873 for (i = 0; i < scb->io_ctx->cmd_len; i++)
3874 printf(" 0x%x", scb->io_ctx->cmnd[i]);
3876 ahd_print_path(ahd, scb);
3877 printf("Saw underflow (%ld of %ld bytes). "
3878 "Treated as error\n",
3879 ahd_get_residual(scb),
3880 ahd_get_transfer_length(scb));
3881 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
3884 ahd_set_transaction_status(scb, CAM_REQ_CMP);
3886 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
3887 ahd_linux_handle_scsi_status(ahd, dev, scb);
3888 } else if (ahd_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
3889 dev->flags |= AHD_DEV_UNCONFIGURED;
3890 if (AHD_DV_CMD(cmd) == FALSE)
3891 dev->target->flags &= ~AHD_DV_REQUIRED;
3894 * Start DV for devices that require it assuming the first command
3895 * sent does not result in a selection timeout.
3897 if (ahd_get_transaction_status(scb) != CAM_SEL_TIMEOUT
3898 && (dev->target->flags & AHD_DV_REQUIRED) != 0)
3899 ahd_linux_start_dv(ahd);
3901 if (dev->openings == 1
3902 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
3903 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
3904 dev->tag_success_count++;
3906 * Some devices deal with temporary internal resource
3907 * shortages by returning queue full. When the queue
3908 * full occurrs, we throttle back. Slowly try to get
3909 * back to our previous queue depth.
3911 if ((dev->openings + dev->active) < dev->maxtags
3912 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
3913 dev->tag_success_count = 0;
3917 if (dev->active == 0)
3918 dev->commands_since_idle_or_otag = 0;
3920 if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
3922 && (dev->flags & AHD_DEV_TIMER_ACTIVE) == 0)
3923 ahd_linux_free_device(ahd, dev);
3925 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
3926 printf("Recovery SCB completes\n");
3927 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
3928 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
3929 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
3930 if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
3931 scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
3932 up(&ahd->platform_data->eh_sem);
3936 ahd_free_scb(ahd, scb);
3937 ahd_linux_queue_cmd_complete(ahd, cmd);
3939 if ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_EMPTY) != 0
3940 && LIST_FIRST(&ahd->pending_scbs) == NULL) {
3941 ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_EMPTY;
3942 up(&ahd->platform_data->dv_sem);
3947 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
3948 struct ahd_linux_device *dev, struct scb *scb)
3950 struct ahd_devinfo devinfo;
3952 ahd_compile_devinfo(&devinfo,
3954 dev->target->target, dev->lun,
3955 dev->target->channel == 0 ? 'A' : 'B',
3959 * We don't currently trust the mid-layer to
3960 * properly deal with queue full or busy. So,
3961 * when one occurs, we tell the mid-layer to
3962 * unconditionally requeue the command to us
3963 * so that we can retry it ourselves. We also
3964 * implement our own throttling mechanism so
3965 * we don't clobber the device with too many
3968 switch (ahd_get_scsi_status(scb)) {
3971 case SCSI_STATUS_CHECK_COND:
3972 case SCSI_STATUS_CMD_TERMINATED:
3977 * Copy sense information to the OS's cmd
3978 * structure if it is available.
3981 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
3982 struct scsi_status_iu_header *siu;
3986 if (scb->flags & SCB_SENSE) {
3987 sense_size = MIN(sizeof(struct scsi_sense_data)
3988 - ahd_get_sense_residual(scb),
3989 sizeof(cmd->sense_buffer));
3993 * Copy only the sense data into the provided
3996 siu = (struct scsi_status_iu_header *)
3998 sense_size = MIN(scsi_4btoul(siu->sense_length),
3999 sizeof(cmd->sense_buffer));
4000 sense_offset = SIU_SENSE_OFFSET(siu);
4003 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
4004 memcpy(cmd->sense_buffer,
4005 ahd_get_sense_buf(ahd, scb)
4006 + sense_offset, sense_size);
4007 cmd->result |= (DRIVER_SENSE << 24);
4010 if (ahd_debug & AHD_SHOW_SENSE) {
4013 printf("Copied %d bytes of sense data at %d:",
4014 sense_size, sense_offset);
4015 for (i = 0; i < sense_size; i++) {
4018 printf("0x%x ", cmd->sense_buffer[i]);
4026 case SCSI_STATUS_QUEUE_FULL:
4029 * By the time the core driver has returned this
4030 * command, all other commands that were queued
4031 * to us but not the device have been returned.
4032 * This ensures that dev->active is equal to
4033 * the number of commands actually queued to
4036 dev->tag_success_count = 0;
4037 if (dev->active != 0) {
4039 * Drop our opening count to the number
4040 * of commands currently outstanding.
4044 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
4045 ahd_print_path(ahd, scb);
4046 printf("Dropping tag count to %d\n",
4050 if (dev->active == dev->tags_on_last_queuefull) {
4052 dev->last_queuefull_same_count++;
4054 * If we repeatedly see a queue full
4055 * at the same queue depth, this
4056 * device has a fixed number of tag
4057 * slots. Lock in this tag depth
4058 * so we stop seeing queue fulls from
4061 if (dev->last_queuefull_same_count
4062 == AHD_LOCK_TAGS_COUNT) {
4063 dev->maxtags = dev->active;
4064 ahd_print_path(ahd, scb);
4065 printf("Locking max tag count at %d\n",
4069 dev->tags_on_last_queuefull = dev->active;
4070 dev->last_queuefull_same_count = 0;
4072 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
4073 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
4074 ahd_platform_set_tags(ahd, &devinfo,
4075 (dev->flags & AHD_DEV_Q_BASIC)
4076 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
4080 * Drop down to a single opening, and treat this
4081 * as if the target returned BUSY SCSI status.
4084 ahd_platform_set_tags(ahd, &devinfo,
4085 (dev->flags & AHD_DEV_Q_BASIC)
4086 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
4087 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
4090 case SCSI_STATUS_BUSY:
4092 * Set a short timer to defer sending commands for
4093 * a bit since Linux will not delay in this case.
4095 if ((dev->flags & AHD_DEV_TIMER_ACTIVE) != 0) {
4096 printf("%s:%c:%d: Device Timer still active during "
4097 "busy processing\n", ahd_name(ahd),
4098 dev->target->channel, dev->target->target);
4101 dev->flags |= AHD_DEV_TIMER_ACTIVE;
4103 init_timer(&dev->timer);
4104 dev->timer.data = (u_long)dev;
4105 dev->timer.expires = jiffies + (HZ/2);
4106 dev->timer.function = ahd_linux_dev_timed_unfreeze;
4107 add_timer(&dev->timer);
4113 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, Scsi_Cmnd *cmd)
4116 * Typically, the complete queue has very few entries
4117 * queued to it before the queue is emptied by
4118 * ahd_linux_run_complete_queue, so sorting the entries
4119 * by generation number should be inexpensive.
4120 * We perform the sort so that commands that complete
4121 * with an error are retuned in the order origionally
4122 * queued to the controller so that any subsequent retries
4123 * are performed in order. The underlying ahd routines do
4124 * not guarantee the order that aborted commands will be
4127 struct ahd_completeq *completeq;
4128 struct ahd_cmd *list_cmd;
4129 struct ahd_cmd *acmd;
4132 * Map CAM error codes into Linux Error codes. We
4133 * avoid the conversion so that the DV code has the
4134 * full error information available when making
4135 * state change decisions.
4137 if (AHD_DV_CMD(cmd) == FALSE) {
4141 status = ahd_cmd_get_transaction_status(cmd);
4142 if (status != CAM_REQ_CMP) {
4143 struct ahd_linux_device *dev;
4144 struct ahd_devinfo devinfo;
4145 cam_status cam_status;
4149 dev = ahd_linux_get_device(ahd, cmd->device->channel,
4157 ahd_compile_devinfo(&devinfo,
4159 dev->target->target, dev->lun,
4160 dev->target->channel == 0 ? 'A':'B',
4163 scsi_status = ahd_cmd_get_scsi_status(cmd);
4164 cam_status = ahd_cmd_get_transaction_status(cmd);
4165 action = aic_error_action(cmd, dev->target->inq_data,
4166 cam_status, scsi_status);
4167 if ((action & SSQ_FALLBACK) != 0) {
4170 dev->target->errors_detected++;
4171 if (dev->target->cmds_since_error == 0)
4172 dev->target->cmds_since_error++;
4174 dev->target->cmds_since_error = 0;
4175 ahd_linux_fallback(ahd, &devinfo);
4181 case CAM_REQ_INPROG:
4183 case CAM_SCSI_STATUS_ERROR:
4184 new_status = DID_OK;
4186 case CAM_REQ_ABORTED:
4187 new_status = DID_ABORT;
4190 new_status = DID_BUS_BUSY;
4192 case CAM_REQ_INVALID:
4193 case CAM_PATH_INVALID:
4194 new_status = DID_BAD_TARGET;
4196 case CAM_SEL_TIMEOUT:
4197 new_status = DID_NO_CONNECT;
4199 case CAM_SCSI_BUS_RESET:
4201 new_status = DID_RESET;
4203 case CAM_UNCOR_PARITY:
4204 new_status = DID_PARITY;
4206 case CAM_CMD_TIMEOUT:
4207 new_status = DID_TIME_OUT;
4210 case CAM_REQ_CMP_ERR:
4211 case CAM_AUTOSENSE_FAIL:
4213 case CAM_DATA_RUN_ERR:
4214 case CAM_UNEXP_BUSFREE:
4215 case CAM_SEQUENCE_FAIL:
4216 case CAM_CCB_LEN_ERR:
4217 case CAM_PROVIDE_FAIL:
4218 case CAM_REQ_TERMIO:
4219 case CAM_UNREC_HBA_ERROR:
4220 case CAM_REQ_TOO_BIG:
4221 new_status = DID_ERROR;
4223 case CAM_REQUEUE_REQ:
4225 * If we want the request requeued, make sure there
4226 * are sufficent retries. In the old scsi error code,
4227 * we used to be able to specify a result code that
4228 * bypassed the retry count. Now we must use this
4229 * hack. We also "fake" a check condition with
4230 * a sense code of ABORTED COMMAND. This seems to
4231 * evoke a retry even if this command is being sent
4232 * via the eh thread. Ick! Ick! Ick!
4234 if (cmd->retries > 0)
4236 new_status = DID_OK;
4237 ahd_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
4238 cmd->result |= (DRIVER_SENSE << 24);
4239 memset(cmd->sense_buffer, 0,
4240 sizeof(cmd->sense_buffer));
4241 cmd->sense_buffer[0] = SSD_ERRCODE_VALID
4242 | SSD_CURRENT_ERROR;
4243 cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
4246 /* We should never get here */
4247 new_status = DID_ERROR;
4251 ahd_cmd_set_transaction_status(cmd, new_status);
4254 completeq = &ahd->platform_data->completeq;
4255 list_cmd = TAILQ_FIRST(completeq);
4256 acmd = (struct ahd_cmd *)cmd;
4257 while (list_cmd != NULL
4258 && acmd_scsi_cmd(list_cmd).serial_number
4259 < acmd_scsi_cmd(acmd).serial_number)
4260 list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
4261 if (list_cmd != NULL)
4262 TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
4264 TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
4268 ahd_linux_filter_inquiry(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
4270 struct scsi_inquiry_data *sid;
4271 struct ahd_initiator_tinfo *tinfo;
4272 struct ahd_transinfo *user;
4273 struct ahd_transinfo *goal;
4274 struct ahd_transinfo *curr;
4275 struct ahd_tmode_tstate *tstate;
4276 struct ahd_linux_device *dev;
4281 u_int trans_version;
4285 * Determine if this lun actually exists. If so,
4286 * hold on to its corresponding device structure.
4287 * If not, make sure we release the device and
4288 * don't bother processing the rest of this inquiry
4291 dev = ahd_linux_get_device(ahd, devinfo->channel - 'A',
4292 devinfo->target, devinfo->lun,
4295 sid = (struct scsi_inquiry_data *)dev->target->inq_data;
4296 if (SID_QUAL(sid) == SID_QUAL_LU_CONNECTED) {
4298 dev->flags &= ~AHD_DEV_UNCONFIGURED;
4300 dev->flags |= AHD_DEV_UNCONFIGURED;
4305 * Update our notion of this device's transfer
4306 * negotiation capabilities.
4308 tinfo = ahd_fetch_transinfo(ahd, devinfo->channel,
4309 devinfo->our_scsiid,
4310 devinfo->target, &tstate);
4311 user = &tinfo->user;
4312 goal = &tinfo->goal;
4313 curr = &tinfo->curr;
4314 width = user->width;
4315 period = user->period;
4316 offset = user->offset;
4317 ppr_options = user->ppr_options;
4318 trans_version = user->transport_version;
4319 prot_version = MIN(user->protocol_version, SID_ANSI_REV(sid));
4322 * Only attempt SPI3/4 once we've verified that
4323 * the device claims to support SPI3/4 features.
4325 if (prot_version < SCSI_REV_2)
4326 trans_version = SID_ANSI_REV(sid);
4328 trans_version = SCSI_REV_2;
4330 if ((sid->flags & SID_WBus16) == 0)
4331 width = MSG_EXT_WDTR_BUS_8_BIT;
4332 if ((sid->flags & SID_Sync) == 0) {
4337 if ((sid->spi3data & SID_SPI_QAS) == 0)
4338 ppr_options &= ~MSG_EXT_PPR_QAS_REQ;
4339 if ((sid->spi3data & SID_SPI_CLOCK_DT) == 0)
4340 ppr_options &= MSG_EXT_PPR_QAS_REQ;
4341 if ((sid->spi3data & SID_SPI_IUS) == 0)
4342 ppr_options &= (MSG_EXT_PPR_DT_REQ
4343 | MSG_EXT_PPR_QAS_REQ);
4345 if (prot_version > SCSI_REV_2
4346 && ppr_options != 0)
4347 trans_version = user->transport_version;
4349 ahd_validate_width(ahd, /*tinfo limit*/NULL, &width, ROLE_UNKNOWN);
4350 ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX);
4351 ahd_validate_offset(ahd, /*tinfo limit*/NULL, period,
4352 &offset, width, ROLE_UNKNOWN);
4353 if (offset == 0 || period == 0) {
4358 /* Apply our filtered user settings. */
4359 curr->transport_version = trans_version;
4360 curr->protocol_version = prot_version;
4361 ahd_set_width(ahd, devinfo, width, AHD_TRANS_GOAL, /*paused*/FALSE);
4362 ahd_set_syncrate(ahd, devinfo, period, offset, ppr_options,
4363 AHD_TRANS_GOAL, /*paused*/FALSE);
4367 ahd_freeze_simq(struct ahd_softc *ahd)
4369 ahd->platform_data->qfrozen++;
4370 if (ahd->platform_data->qfrozen == 1) {
4371 scsi_block_requests(ahd->platform_data->host);
4372 ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
4373 CAM_LUN_WILDCARD, SCB_LIST_NULL,
4374 ROLE_INITIATOR, CAM_REQUEUE_REQ);
4379 ahd_release_simq(struct ahd_softc *ahd)
4386 if (ahd->platform_data->qfrozen > 0)
4387 ahd->platform_data->qfrozen--;
4388 if (ahd->platform_data->qfrozen == 0) {
4391 if (AHD_DV_SIMQ_FROZEN(ahd)
4392 && ((ahd->platform_data->flags & AHD_DV_WAIT_SIMQ_RELEASE) != 0)) {
4393 ahd->platform_data->flags &= ~AHD_DV_WAIT_SIMQ_RELEASE;
4394 up(&ahd->platform_data->dv_sem);
4396 ahd_unlock(ahd, &s);
4398 * There is still a race here. The mid-layer
4399 * should keep its own freeze count and use
4400 * a bottom half handler to run the queues
4401 * so we can unblock with our own lock held.
4404 scsi_unblock_requests(ahd->platform_data->host);
4408 ahd_linux_sem_timeout(u_long arg)
4411 struct ahd_softc *ahd;
4414 scb = (struct scb *)arg;
4415 ahd = scb->ahd_softc;
4417 if ((scb->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
4418 scb->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
4419 up(&ahd->platform_data->eh_sem);
4421 ahd_unlock(ahd, &s);
4425 ahd_linux_dev_timed_unfreeze(u_long arg)
4427 struct ahd_linux_device *dev;
4428 struct ahd_softc *ahd;
4431 dev = (struct ahd_linux_device *)arg;
4432 ahd = dev->target->ahd;
4434 dev->flags &= ~AHD_DEV_TIMER_ACTIVE;
4435 if (dev->qfrozen > 0)
4437 if ((dev->flags & AHD_DEV_UNCONFIGURED) != 0
4438 && dev->active == 0)
4439 ahd_linux_free_device(ahd, dev);
4440 ahd_unlock(ahd, &s);
4444 ahd_linux_init(void)
4446 return ahd_linux_detect(&aic79xx_driver_template);
4450 ahd_linux_exit(void)
4452 struct ahd_softc *ahd;
4455 * Shutdown DV threads before going into the SCSI mid-layer.
4456 * This avoids situations where the mid-layer locks the entire
4457 * kernel so that waiting for our DV threads to exit leads
4460 TAILQ_FOREACH(ahd, &ahd_tailq, links) {
4462 ahd_linux_kill_dv_thread(ahd);
4465 ahd_linux_pci_exit();
4468 module_init(ahd_linux_init);
4469 module_exit(ahd_linux_exit);