2 * Adaptec AIC7xxx device driver for Linux.
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
6 * Copyright (c) 1994 John Aycock
7 * The University of Calgary Department of Computer Science.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, write to
21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
24 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
25 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
26 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
27 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
28 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
29 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
30 * ANSI SCSI-2 specification (draft 10c), ...
32 * --------------------------------------------------------------------------
34 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
36 * Substantially modified to include support for wide and twin bus
37 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
38 * SCB paging, and other rework of the code.
40 * --------------------------------------------------------------------------
41 * Copyright (c) 1994-2000 Justin T. Gibbs.
42 * Copyright (c) 2000-2001 Adaptec Inc.
43 * All rights reserved.
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions, and the following disclaimer,
50 * without modification.
51 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
52 * substantially similar to the "NO WARRANTY" disclaimer below
53 * ("Disclaimer") and any redistribution must be conditioned upon
54 * including a substantially similar Disclaimer requirement for further
55 * binary redistribution.
56 * 3. Neither the names of the above-listed copyright holders nor the names
57 * of any contributors may be used to endorse or promote products derived
58 * from this software without specific prior written permission.
60 * Alternatively, this software may be distributed under the terms of the
61 * GNU General Public License ("GPL") version 2 as published by the Free
62 * Software Foundation.
65 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
66 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
67 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
68 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
69 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
73 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
74 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
75 * POSSIBILITY OF SUCH DAMAGES.
77 *---------------------------------------------------------------------------
79 * Thanks also go to (in alphabetical order) the following:
81 * Rory Bolt - Sequencer bug fixes
82 * Jay Estabrook - Initial DEC Alpha support
83 * Doug Ledford - Much needed abort/reset bug fixes
84 * Kai Makisara - DMAing of SCBs
86 * A Boot time option was also added for not resetting the scsi bus.
88 * Form: aic7xxx=extended
92 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
94 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
98 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
100 * Copyright (c) 1997-1999 Doug Ledford
102 * These changes are released under the same licensing terms as the FreeBSD
103 * driver written by Justin Gibbs. Please see his Copyright notice above
104 * for the exact terms and conditions covering my changes as well as the
105 * warranty statement.
107 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
108 * but are not limited to:
110 * 1: Import of the latest FreeBSD sequencer code for this driver
111 * 2: Modification of kernel code to accommodate different sequencer semantics
112 * 3: Extensive changes throughout kernel portion of driver to improve
113 * abort/reset processing and error hanndling
114 * 4: Other work contributed by various people on the Internet
115 * 5: Changes to printk information and verbosity selection code
116 * 6: General reliability related changes, especially in IRQ management
117 * 7: Modifications to the default probe/attach order for supported cards
118 * 8: SMP friendliness has been improved
122 #include "aic7xxx_osm.h"
123 #include "aic7xxx_inline.h"
124 #include <scsi/scsicam.h>
127 * Include aiclib.c as part of our
128 * "module dependencies are hard" work around.
132 #include <linux/init.h> /* __setup */
134 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
135 #include "sd.h" /* For geometry detection */
138 #include <linux/mm.h> /* For fetching system memory size */
139 #include <linux/blkdev.h> /* For block_size() */
140 #include <linux/delay.h> /* For ssleep/msleep */
143 * Lock protecting manipulation of the ahc softc list.
145 spinlock_t ahc_list_spinlock
;
147 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
148 /* For dynamic sglist size calculation. */
149 u_int ahc_linux_nseg
;
153 * Set this to the delay in seconds after SCSI bus reset.
154 * Note, we honor this only for the initial bus reset.
155 * The scsi error recovery code performs its own bus settle
156 * delay handling for error recovery actions.
158 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
159 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
161 #define AIC7XXX_RESET_DELAY 5000
165 * Control collection of SCSI transfer statistics for the /proc filesystem.
167 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
168 * NOTE: This does affect performance since it has to maintain statistics.
170 #ifdef CONFIG_AIC7XXX_PROC_STATS
171 #define AIC7XXX_PROC_STATS
175 * To change the default number of tagged transactions allowed per-device,
176 * add a line to the lilo.conf file like:
177 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
178 * which will result in the first four devices on the first two
179 * controllers being set to a tagged queue depth of 32.
181 * The tag_commands is an array of 16 to allow for wide and twin adapters.
182 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
186 uint8_t tag_commands
[16]; /* Allow for wide/twin adapters. */
187 } adapter_tag_info_t
;
190 * Modify this as you see fit for your system.
192 * 0 tagged queuing disabled
193 * 1 <= n <= 253 n == max tags ever dispatched.
195 * The driver will throttle the number of commands dispatched to a
196 * device if it returns queue full. For devices with a fixed maximum
197 * queue depth, the driver will eventually determine this depth and
198 * lock it in (a console message is printed to indicate that a lock
199 * has occurred). On some devices, queue full is returned for a temporary
200 * resource shortage. These devices will return queue full at varying
201 * depths. The driver will throttle back when the queue fulls occur and
202 * attempt to slowly increase the depth over time as the device recovers
203 * from the resource shortage.
205 * In this example, the first line will disable tagged queueing for all
206 * the devices on the first probed aic7xxx adapter.
208 * The second line enables tagged queueing with 4 commands/LUN for IDs
209 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
210 * driver to attempt to use up to 64 tags for ID 1.
212 * The third line is the same as the first line.
214 * The fourth line disables tagged queueing for devices 0 and 3. It
215 * enables tagged queueing for the other IDs, with 16 commands/LUN
216 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
217 * IDs 2, 5-7, and 9-15.
221 * NOTE: The below structure is for reference only, the actual structure
222 * to modify in order to change things is just below this comment block.
223 adapter_tag_info_t aic7xxx_tag_info[] =
225 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
226 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
227 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
228 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
232 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
233 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
235 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
238 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
239 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
240 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
241 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
242 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
243 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
244 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
245 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
246 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
250 * By default, use the number of commands specified by
251 * the users kernel configuration.
253 static adapter_tag_info_t aic7xxx_tag_info
[] =
255 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
256 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
257 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
258 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
259 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
260 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
261 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
262 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
263 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
264 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
265 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
266 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
267 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
268 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
269 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
270 {AIC7XXX_CONFIGED_TAG_COMMANDS
}
276 * positive value = DV Enabled
278 * negative value = DV Default for adapter type/seeprom
280 #ifdef CONFIG_AIC7XXX_DV_SETTING
281 #define AIC7XXX_CONFIGED_DV CONFIG_AIC7XXX_DV_SETTING
283 #define AIC7XXX_CONFIGED_DV -1
286 static int8_t aic7xxx_dv_settings
[] =
307 * There should be a specific return value for this in scsi.h, but
308 * it seems that most drivers ignore it.
310 #define DID_UNDERFLOW DID_ERROR
313 ahc_print_path(struct ahc_softc
*ahc
, struct scb
*scb
)
315 printk("(scsi%d:%c:%d:%d): ",
316 ahc
->platform_data
->host
->host_no
,
317 scb
!= NULL
? SCB_GET_CHANNEL(ahc
, scb
) : 'X',
318 scb
!= NULL
? SCB_GET_TARGET(ahc
, scb
) : -1,
319 scb
!= NULL
? SCB_GET_LUN(scb
) : -1);
323 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
324 * cards in the system. This should be fixed. Exceptions to this
325 * rule are noted in the comments.
329 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
330 * has no effect on any later resets that might occur due to things like
333 static uint32_t aic7xxx_no_reset
;
336 * Certain PCI motherboards will scan PCI devices from highest to lowest,
337 * others scan from lowest to highest, and they tend to do all kinds of
338 * strange things when they come into contact with PCI bridge chips. The
339 * net result of all this is that the PCI card that is actually used to boot
340 * the machine is very hard to detect. Most motherboards go from lowest
341 * PCI slot number to highest, and the first SCSI controller found is the
342 * one you boot from. The only exceptions to this are when a controller
343 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
344 * from lowest PCI slot number to highest PCI slot number. We also force
345 * all controllers with their BIOS disabled to the end of the list. This
346 * works on *almost* all computers. Where it doesn't work, we have this
347 * option. Setting this option to non-0 will reverse the order of the sort
348 * to highest first, then lowest, but will still leave cards with their BIOS
349 * disabled at the very end. That should fix everyone up unless there are
350 * really strange cirumstances.
352 static uint32_t aic7xxx_reverse_scan
;
355 * Should we force EXTENDED translation on a controller.
356 * 0 == Use whatever is in the SEEPROM or default to off
357 * 1 == Use whatever is in the SEEPROM or default to on
359 static uint32_t aic7xxx_extended
;
362 * PCI bus parity checking of the Adaptec controllers. This is somewhat
363 * dubious at best. To my knowledge, this option has never actually
364 * solved a PCI parity problem, but on certain machines with broken PCI
365 * chipset configurations where stray PCI transactions with bad parity are
366 * the norm rather than the exception, the error messages can be overwelming.
367 * It's included in the driver for completeness.
368 * 0 = Shut off PCI parity check
369 * non-0 = reverse polarity pci parity checking
371 static uint32_t aic7xxx_pci_parity
= ~0;
374 * Certain newer motherboards have put new PCI based devices into the
375 * IO spaces that used to typically be occupied by VLB or EISA cards.
376 * This overlap can cause these newer motherboards to lock up when scanned
377 * for older EISA and VLB devices. Setting this option to non-0 will
378 * cause the driver to skip scanning for any VLB or EISA controllers and
379 * only support the PCI controllers. NOTE: this means that if the kernel
380 * os compiled with PCI support disabled, then setting this to non-0
381 * would result in never finding any devices :)
383 #ifndef CONFIG_AIC7XXX_PROBE_EISA_VL
384 uint32_t aic7xxx_probe_eisa_vl
;
386 uint32_t aic7xxx_probe_eisa_vl
= ~0;
390 * There are lots of broken chipsets in the world. Some of them will
391 * violate the PCI spec when we issue byte sized memory writes to our
392 * controller. I/O mapped register access, if allowed by the given
393 * platform, will work in almost all cases.
395 uint32_t aic7xxx_allow_memio
= ~0;
398 * aic7xxx_detect() has been run, so register all device arrivals
399 * immediately with the system rather than deferring to the sorted
400 * attachment performed by aic7xxx_detect().
402 int aic7xxx_detect_complete
;
405 * So that we can set how long each device is given as a selection timeout.
406 * The table of values goes like this:
411 * We default to 256ms because some older devices need a longer time
412 * to respond to initial selection.
414 static uint32_t aic7xxx_seltime
;
417 * Certain devices do not perform any aging on commands. Should the
418 * device be saturated by commands in one portion of the disk, it is
419 * possible for transactions on far away sectors to never be serviced.
420 * To handle these devices, we can periodically send an ordered tag to
421 * force all outstanding transactions to be serviced prior to a new
424 uint32_t aic7xxx_periodic_otag
;
427 * Module information and settable options.
429 static char *aic7xxx
= NULL
;
431 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
432 MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
433 MODULE_LICENSE("Dual BSD/GPL");
434 MODULE_VERSION(AIC7XXX_DRIVER_VERSION
);
435 module_param(aic7xxx
, charp
, 0444);
436 MODULE_PARM_DESC(aic7xxx
,
437 "period delimited, options string.\n"
438 " verbose Enable verbose/diagnostic logging\n"
439 " allow_memio Allow device registers to be memory mapped\n"
440 " debug Bitmask of debug values to enable\n"
441 " no_probe Toggle EISA/VLB controller probing\n"
442 " probe_eisa_vl Toggle EISA/VLB controller probing\n"
443 " no_reset Supress initial bus resets\n"
444 " extended Enable extended geometry on all controllers\n"
445 " periodic_otag Send an ordered tagged transaction\n"
446 " periodically to prevent tag starvation.\n"
447 " This may be required by some older disk\n"
448 " drives or RAID arrays.\n"
449 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
450 " tag_info:<tag_str> Set per-target tag depth\n"
451 " global_tag_depth:<int> Global tag depth for every target\n"
453 " dv:<dv_settings> Set per-controller Domain Validation Setting.\n"
454 " seltime:<int> Selection Timeout\n"
455 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
457 " Sample /etc/modprobe.conf line:\n"
458 " Toggle EISA/VLB probing\n"
459 " Set tag depth on Controller 1/Target 1 to 10 tags\n"
460 " Shorten the selection timeout to 128ms\n"
462 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
465 static void ahc_linux_handle_scsi_status(struct ahc_softc
*,
466 struct ahc_linux_device
*,
468 static void ahc_linux_queue_cmd_complete(struct ahc_softc
*ahc
,
470 static void ahc_linux_filter_inquiry(struct ahc_softc
*, struct ahc_devinfo
*);
471 static void ahc_linux_sem_timeout(u_long arg
);
472 static void ahc_linux_freeze_simq(struct ahc_softc
*ahc
);
473 static void ahc_linux_release_simq(u_long arg
);
474 static void ahc_linux_dev_timed_unfreeze(u_long arg
);
475 static int ahc_linux_queue_recovery_cmd(Scsi_Cmnd
*cmd
, scb_flag flag
);
476 static void ahc_linux_initialize_scsi_bus(struct ahc_softc
*ahc
);
477 static void ahc_linux_size_nseg(void);
478 static void ahc_linux_thread_run_complete_queue(struct ahc_softc
*ahc
);
479 static void ahc_linux_start_dv(struct ahc_softc
*ahc
);
480 static void ahc_linux_dv_timeout(struct scsi_cmnd
*cmd
);
481 static int ahc_linux_dv_thread(void *data
);
482 static void ahc_linux_kill_dv_thread(struct ahc_softc
*ahc
);
483 static void ahc_linux_dv_target(struct ahc_softc
*ahc
, u_int target
);
484 static void ahc_linux_dv_transition(struct ahc_softc
*ahc
,
485 struct scsi_cmnd
*cmd
,
486 struct ahc_devinfo
*devinfo
,
487 struct ahc_linux_target
*targ
);
488 static void ahc_linux_dv_fill_cmd(struct ahc_softc
*ahc
,
489 struct scsi_cmnd
*cmd
,
490 struct ahc_devinfo
*devinfo
);
491 static void ahc_linux_dv_inq(struct ahc_softc
*ahc
,
492 struct scsi_cmnd
*cmd
,
493 struct ahc_devinfo
*devinfo
,
494 struct ahc_linux_target
*targ
,
495 u_int request_length
);
496 static void ahc_linux_dv_tur(struct ahc_softc
*ahc
,
497 struct scsi_cmnd
*cmd
,
498 struct ahc_devinfo
*devinfo
);
499 static void ahc_linux_dv_rebd(struct ahc_softc
*ahc
,
500 struct scsi_cmnd
*cmd
,
501 struct ahc_devinfo
*devinfo
,
502 struct ahc_linux_target
*targ
);
503 static void ahc_linux_dv_web(struct ahc_softc
*ahc
,
504 struct scsi_cmnd
*cmd
,
505 struct ahc_devinfo
*devinfo
,
506 struct ahc_linux_target
*targ
);
507 static void ahc_linux_dv_reb(struct ahc_softc
*ahc
,
508 struct scsi_cmnd
*cmd
,
509 struct ahc_devinfo
*devinfo
,
510 struct ahc_linux_target
*targ
);
511 static void ahc_linux_dv_su(struct ahc_softc
*ahc
,
512 struct scsi_cmnd
*cmd
,
513 struct ahc_devinfo
*devinfo
,
514 struct ahc_linux_target
*targ
);
515 static int ahc_linux_fallback(struct ahc_softc
*ahc
,
516 struct ahc_devinfo
*devinfo
);
517 static void ahc_linux_dv_complete(Scsi_Cmnd
*cmd
);
518 static void ahc_linux_generate_dv_pattern(struct ahc_linux_target
*targ
);
519 static u_int
ahc_linux_user_tagdepth(struct ahc_softc
*ahc
,
520 struct ahc_devinfo
*devinfo
);
521 static u_int
ahc_linux_user_dv_setting(struct ahc_softc
*ahc
);
522 static void ahc_linux_device_queue_depth(struct ahc_softc
*ahc
,
523 struct ahc_linux_device
*dev
);
524 static struct ahc_linux_target
* ahc_linux_alloc_target(struct ahc_softc
*,
526 static void ahc_linux_free_target(struct ahc_softc
*,
527 struct ahc_linux_target
*);
528 static struct ahc_linux_device
* ahc_linux_alloc_device(struct ahc_softc
*,
529 struct ahc_linux_target
*,
531 static void ahc_linux_free_device(struct ahc_softc
*,
532 struct ahc_linux_device
*);
533 static void ahc_linux_run_device_queue(struct ahc_softc
*,
534 struct ahc_linux_device
*);
535 static void ahc_linux_setup_tag_info_global(char *p
);
536 static aic_option_callback_t ahc_linux_setup_tag_info
;
537 static aic_option_callback_t ahc_linux_setup_dv
;
538 static int aic7xxx_setup(char *s
);
539 static int ahc_linux_next_unit(void);
540 static void ahc_runq_tasklet(unsigned long data
);
541 static struct ahc_cmd
*ahc_linux_run_complete_queue(struct ahc_softc
*ahc
);
543 /********************************* Inlines ************************************/
544 static __inline
void ahc_schedule_runq(struct ahc_softc
*ahc
);
545 static __inline
struct ahc_linux_device
*
546 ahc_linux_get_device(struct ahc_softc
*ahc
, u_int channel
,
547 u_int target
, u_int lun
, int alloc
);
548 static __inline
void ahc_schedule_completeq(struct ahc_softc
*ahc
);
549 static __inline
void ahc_linux_check_device_queue(struct ahc_softc
*ahc
,
550 struct ahc_linux_device
*dev
);
551 static __inline
struct ahc_linux_device
*
552 ahc_linux_next_device_to_run(struct ahc_softc
*ahc
);
553 static __inline
void ahc_linux_run_device_queues(struct ahc_softc
*ahc
);
554 static __inline
void ahc_linux_unmap_scb(struct ahc_softc
*, struct scb
*);
556 static __inline
int ahc_linux_map_seg(struct ahc_softc
*ahc
, struct scb
*scb
,
557 struct ahc_dma_seg
*sg
,
558 dma_addr_t addr
, bus_size_t len
);
561 ahc_schedule_completeq(struct ahc_softc
*ahc
)
563 if ((ahc
->platform_data
->flags
& AHC_RUN_CMPLT_Q_TIMER
) == 0) {
564 ahc
->platform_data
->flags
|= AHC_RUN_CMPLT_Q_TIMER
;
565 ahc
->platform_data
->completeq_timer
.expires
= jiffies
;
566 add_timer(&ahc
->platform_data
->completeq_timer
);
571 * Must be called with our lock held.
574 ahc_schedule_runq(struct ahc_softc
*ahc
)
576 tasklet_schedule(&ahc
->platform_data
->runq_tasklet
);
579 static __inline
struct ahc_linux_device
*
580 ahc_linux_get_device(struct ahc_softc
*ahc
, u_int channel
, u_int target
,
581 u_int lun
, int alloc
)
583 struct ahc_linux_target
*targ
;
584 struct ahc_linux_device
*dev
;
587 target_offset
= target
;
590 targ
= ahc
->platform_data
->targets
[target_offset
];
593 targ
= ahc_linux_alloc_target(ahc
, channel
, target
);
599 dev
= targ
->devices
[lun
];
600 if (dev
== NULL
&& alloc
!= 0)
601 dev
= ahc_linux_alloc_device(ahc
, targ
, lun
);
605 #define AHC_LINUX_MAX_RETURNED_ERRORS 4
606 static struct ahc_cmd
*
607 ahc_linux_run_complete_queue(struct ahc_softc
*ahc
)
609 struct ahc_cmd
*acmd
;
614 ahc_done_lock(ahc
, &done_flags
);
615 while ((acmd
= TAILQ_FIRST(&ahc
->platform_data
->completeq
)) != NULL
) {
618 if (with_errors
> AHC_LINUX_MAX_RETURNED_ERRORS
) {
620 * Linux uses stack recursion to requeue
621 * commands that need to be retried. Avoid
622 * blowing out the stack by "spoon feeding"
623 * commands that completed with error back
624 * the operating system in case they are going
625 * to be retried. "ick"
627 ahc_schedule_completeq(ahc
);
630 TAILQ_REMOVE(&ahc
->platform_data
->completeq
,
631 acmd
, acmd_links
.tqe
);
632 cmd
= &acmd_scsi_cmd(acmd
);
633 cmd
->host_scribble
= NULL
;
634 if (ahc_cmd_get_transaction_status(cmd
) != DID_OK
635 || (cmd
->result
& 0xFF) != SCSI_STATUS_OK
)
640 ahc_done_unlock(ahc
, &done_flags
);
645 ahc_linux_check_device_queue(struct ahc_softc
*ahc
,
646 struct ahc_linux_device
*dev
)
648 if ((dev
->flags
& AHC_DEV_FREEZE_TIL_EMPTY
) != 0
649 && dev
->active
== 0) {
650 dev
->flags
&= ~AHC_DEV_FREEZE_TIL_EMPTY
;
654 if (TAILQ_FIRST(&dev
->busyq
) == NULL
655 || dev
->openings
== 0 || dev
->qfrozen
!= 0)
658 ahc_linux_run_device_queue(ahc
, dev
);
661 static __inline
struct ahc_linux_device
*
662 ahc_linux_next_device_to_run(struct ahc_softc
*ahc
)
665 if ((ahc
->flags
& AHC_RESOURCE_SHORTAGE
) != 0
666 || (ahc
->platform_data
->qfrozen
!= 0
667 && AHC_DV_SIMQ_FROZEN(ahc
) == 0))
669 return (TAILQ_FIRST(&ahc
->platform_data
->device_runq
));
673 ahc_linux_run_device_queues(struct ahc_softc
*ahc
)
675 struct ahc_linux_device
*dev
;
677 while ((dev
= ahc_linux_next_device_to_run(ahc
)) != NULL
) {
678 TAILQ_REMOVE(&ahc
->platform_data
->device_runq
, dev
, links
);
679 dev
->flags
&= ~AHC_DEV_ON_RUN_LIST
;
680 ahc_linux_check_device_queue(ahc
, dev
);
685 ahc_linux_unmap_scb(struct ahc_softc
*ahc
, struct scb
*scb
)
690 ahc_sync_sglist(ahc
, scb
, BUS_DMASYNC_POSTWRITE
);
691 if (cmd
->use_sg
!= 0) {
692 struct scatterlist
*sg
;
694 sg
= (struct scatterlist
*)cmd
->request_buffer
;
695 pci_unmap_sg(ahc
->dev_softc
, sg
, cmd
->use_sg
,
696 scsi_to_pci_dma_dir(cmd
->sc_data_direction
));
697 } else if (cmd
->request_bufflen
!= 0) {
698 pci_unmap_single(ahc
->dev_softc
,
699 scb
->platform_data
->buf_busaddr
,
700 cmd
->request_bufflen
,
701 scsi_to_pci_dma_dir(cmd
->sc_data_direction
));
706 ahc_linux_map_seg(struct ahc_softc
*ahc
, struct scb
*scb
,
707 struct ahc_dma_seg
*sg
, dma_addr_t addr
, bus_size_t len
)
711 if ((scb
->sg_count
+ 1) > AHC_NSEG
)
712 panic("Too few segs for dma mapping. "
713 "Increase AHC_NSEG\n");
716 sg
->addr
= ahc_htole32(addr
& 0xFFFFFFFF);
717 scb
->platform_data
->xfer_len
+= len
;
719 if (sizeof(dma_addr_t
) > 4
720 && (ahc
->flags
& AHC_39BIT_ADDRESSING
) != 0)
721 len
|= (addr
>> 8) & AHC_SG_HIGH_ADDR_MASK
;
723 sg
->len
= ahc_htole32(len
);
727 /************************ Host template entry points *************************/
728 static int ahc_linux_detect(Scsi_Host_Template
*);
729 static int ahc_linux_queue(Scsi_Cmnd
*, void (*)(Scsi_Cmnd
*));
730 static const char *ahc_linux_info(struct Scsi_Host
*);
731 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
732 static int ahc_linux_slave_alloc(Scsi_Device
*);
733 static int ahc_linux_slave_configure(Scsi_Device
*);
734 static void ahc_linux_slave_destroy(Scsi_Device
*);
735 #if defined(__i386__)
736 static int ahc_linux_biosparam(struct scsi_device
*,
737 struct block_device
*,
741 static int ahc_linux_release(struct Scsi_Host
*);
742 static void ahc_linux_select_queue_depth(struct Scsi_Host
*host
,
743 Scsi_Device
*scsi_devs
);
744 #if defined(__i386__)
745 static int ahc_linux_biosparam(Disk
*, kdev_t
, int[]);
748 static int ahc_linux_bus_reset(Scsi_Cmnd
*);
749 static int ahc_linux_dev_reset(Scsi_Cmnd
*);
750 static int ahc_linux_abort(Scsi_Cmnd
*);
753 * Calculate a safe value for AHC_NSEG (as expressed through ahc_linux_nseg).
756 * The midlayer allocates an S/G array dynamically when a command is issued
757 * using SCSI malloc. This array, which is in an OS dependent format that
758 * must later be copied to our private S/G list, is sized to house just the
759 * number of segments needed for the current transfer. Since the code that
760 * sizes the SCSI malloc pool does not take into consideration fragmentation
761 * of the pool, executing transactions numbering just a fraction of our
762 * concurrent transaction limit with list lengths aproaching AHC_NSEG will
763 * quickly depleat the SCSI malloc pool of usable space. Unfortunately, the
764 * mid-layer does not properly handle this scsi malloc failures for the S/G
765 * array and the result can be a lockup of the I/O subsystem. We try to size
766 * our S/G list so that it satisfies our drivers allocation requirements in
767 * addition to avoiding fragmentation of the SCSI malloc pool.
770 ahc_linux_size_nseg(void)
772 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
777 * The SCSI allocator rounds to the nearest 512 bytes
778 * an cannot allocate across a page boundary. Our algorithm
779 * is to start at 1K of scsi malloc space per-command and
780 * loop through all factors of the PAGE_SIZE and pick the best.
783 for (cur_size
= 1024; cur_size
<= PAGE_SIZE
; cur_size
*= 2) {
786 nseg
= cur_size
/ sizeof(struct scatterlist
);
787 if (nseg
< AHC_LINUX_MIN_NSEG
)
790 if (best_size
== 0) {
791 best_size
= cur_size
;
792 ahc_linux_nseg
= nseg
;
798 * Compare the traits of the current "best_size"
799 * with the current size to determine if the
800 * current size is a better size.
802 best_rem
= best_size
% sizeof(struct scatterlist
);
803 cur_rem
= cur_size
% sizeof(struct scatterlist
);
804 if (cur_rem
< best_rem
) {
805 best_size
= cur_size
;
806 ahc_linux_nseg
= nseg
;
814 * Try to detect an Adaptec 7XXX controller.
817 ahc_linux_detect(Scsi_Host_Template
*template)
819 struct ahc_softc
*ahc
;
822 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
824 * It is a bug that the upper layer takes
825 * this lock just prior to calling us.
827 spin_unlock_irq(&io_request_lock
);
831 * Sanity checking of Linux SCSI data structures so
832 * that some of our hacks^H^H^H^H^Hassumptions aren't
835 if (offsetof(struct ahc_cmd_internal
, end
)
836 > offsetof(struct scsi_cmnd
, host_scribble
)) {
837 printf("ahc_linux_detect: SCSI data structures changed.\n");
838 printf("ahc_linux_detect: Unable to attach\n");
841 ahc_linux_size_nseg();
843 * If we've been passed any parameters, process them now.
846 aic7xxx_setup(aic7xxx
);
848 template->proc_name
= "aic7xxx";
851 * Initialize our softc list lock prior to
852 * probing for any adapters.
856 found
= ahc_linux_pci_init();
857 if (!ahc_linux_eisa_init())
861 * Register with the SCSI layer all
862 * controllers we've found.
864 TAILQ_FOREACH(ahc
, &ahc_tailq
, links
) {
866 if (ahc_linux_register_host(ahc
, template) == 0)
870 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
871 spin_lock_irq(&io_request_lock
);
873 aic7xxx_detect_complete
++;
878 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
880 * Free the passed in Scsi_Host memory structures prior to unloading the
884 ahc_linux_release(struct Scsi_Host
* host
)
886 struct ahc_softc
*ahc
;
893 * We should be able to just perform
894 * the free directly, but check our
895 * list for extra sanity.
897 ahc
= ahc_find_softc(*(struct ahc_softc
**)host
->hostdata
);
902 ahc_intr_enable(ahc
, FALSE
);
913 * Return a string describing the driver.
916 ahc_linux_info(struct Scsi_Host
*host
)
918 static char buffer
[512];
921 struct ahc_softc
*ahc
;
924 ahc
= *(struct ahc_softc
**)host
->hostdata
;
925 memset(bp
, 0, sizeof(buffer
));
926 strcpy(bp
, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
927 strcat(bp
, AIC7XXX_DRIVER_VERSION
);
930 strcat(bp
, ahc
->description
);
933 ahc_controller_info(ahc
, ahc_info
);
934 strcat(bp
, ahc_info
);
941 * Queue an SCB to the controller.
944 ahc_linux_queue(Scsi_Cmnd
* cmd
, void (*scsi_done
) (Scsi_Cmnd
*))
946 struct ahc_softc
*ahc
;
947 struct ahc_linux_device
*dev
;
950 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
953 * Save the callback on completion function.
955 cmd
->scsi_done
= scsi_done
;
957 ahc_midlayer_entrypoint_lock(ahc
, &flags
);
960 * Close the race of a command that was in the process of
961 * being queued to us just as our simq was frozen. Let
962 * DV commands through so long as we are only frozen to
965 if (ahc
->platform_data
->qfrozen
!= 0
966 && AHC_DV_CMD(cmd
) == 0) {
968 ahc_cmd_set_transaction_status(cmd
, CAM_REQUEUE_REQ
);
969 ahc_linux_queue_cmd_complete(ahc
, cmd
);
970 ahc_schedule_completeq(ahc
);
971 ahc_midlayer_entrypoint_unlock(ahc
, &flags
);
974 dev
= ahc_linux_get_device(ahc
, cmd
->device
->channel
, cmd
->device
->id
,
975 cmd
->device
->lun
, /*alloc*/TRUE
);
977 ahc_cmd_set_transaction_status(cmd
, CAM_RESRC_UNAVAIL
);
978 ahc_linux_queue_cmd_complete(ahc
, cmd
);
979 ahc_schedule_completeq(ahc
);
980 ahc_midlayer_entrypoint_unlock(ahc
, &flags
);
981 printf("%s: aic7xxx_linux_queue - Unable to allocate device!\n",
985 cmd
->result
= CAM_REQ_INPROG
<< 16;
986 TAILQ_INSERT_TAIL(&dev
->busyq
, (struct ahc_cmd
*)cmd
, acmd_links
.tqe
);
987 if ((dev
->flags
& AHC_DEV_ON_RUN_LIST
) == 0) {
988 TAILQ_INSERT_TAIL(&ahc
->platform_data
->device_runq
, dev
, links
);
989 dev
->flags
|= AHC_DEV_ON_RUN_LIST
;
990 ahc_linux_run_device_queues(ahc
);
992 ahc_midlayer_entrypoint_unlock(ahc
, &flags
);
996 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
998 ahc_linux_slave_alloc(Scsi_Device
*device
)
1000 struct ahc_softc
*ahc
;
1002 ahc
= *((struct ahc_softc
**)device
->host
->hostdata
);
1004 printf("%s: Slave Alloc %d\n", ahc_name(ahc
), device
->id
);
1009 ahc_linux_slave_configure(Scsi_Device
*device
)
1011 struct ahc_softc
*ahc
;
1012 struct ahc_linux_device
*dev
;
1015 ahc
= *((struct ahc_softc
**)device
->host
->hostdata
);
1017 printf("%s: Slave Configure %d\n", ahc_name(ahc
), device
->id
);
1018 ahc_midlayer_entrypoint_lock(ahc
, &flags
);
1020 * Since Linux has attached to the device, configure
1021 * it so we don't free and allocate the device
1022 * structure on every command.
1024 dev
= ahc_linux_get_device(ahc
, device
->channel
,
1025 device
->id
, device
->lun
,
1028 dev
->flags
&= ~AHC_DEV_UNCONFIGURED
;
1029 dev
->scsi_device
= device
;
1030 ahc_linux_device_queue_depth(ahc
, dev
);
1032 ahc_midlayer_entrypoint_unlock(ahc
, &flags
);
1037 ahc_linux_slave_destroy(Scsi_Device
*device
)
1039 struct ahc_softc
*ahc
;
1040 struct ahc_linux_device
*dev
;
1043 ahc
= *((struct ahc_softc
**)device
->host
->hostdata
);
1045 printf("%s: Slave Destroy %d\n", ahc_name(ahc
), device
->id
);
1046 ahc_midlayer_entrypoint_lock(ahc
, &flags
);
1047 dev
= ahc_linux_get_device(ahc
, device
->channel
,
1048 device
->id
, device
->lun
,
1051 * Filter out "silly" deletions of real devices by only
1052 * deleting devices that have had slave_configure()
1053 * called on them. All other devices that have not
1054 * been configured will automatically be deleted by
1055 * the refcounting process.
1058 && (dev
->flags
& AHC_DEV_SLAVE_CONFIGURED
) != 0) {
1059 dev
->flags
|= AHC_DEV_UNCONFIGURED
;
1060 if (TAILQ_EMPTY(&dev
->busyq
)
1062 && (dev
->flags
& AHC_DEV_TIMER_ACTIVE
) == 0)
1063 ahc_linux_free_device(ahc
, dev
);
1065 ahc_midlayer_entrypoint_unlock(ahc
, &flags
);
1069 * Sets the queue depth for each SCSI device hanging
1070 * off the input host adapter.
1073 ahc_linux_select_queue_depth(struct Scsi_Host
*host
, Scsi_Device
*scsi_devs
)
1075 Scsi_Device
*device
;
1077 struct ahc_softc
*ahc
;
1080 ahc
= *((struct ahc_softc
**)host
->hostdata
);
1081 ahc_lock(ahc
, &flags
);
1082 for (device
= scsi_devs
; device
!= NULL
; device
= device
->next
) {
1085 * Watch out for duplicate devices. This works around
1086 * some quirks in how the SCSI scanning code does its
1087 * device management.
1089 for (ldev
= scsi_devs
; ldev
!= device
; ldev
= ldev
->next
) {
1090 if (ldev
->host
== device
->host
1091 && ldev
->channel
== device
->channel
1092 && ldev
->id
== device
->id
1093 && ldev
->lun
== device
->lun
)
1096 /* Skip duplicate. */
1100 if (device
->host
== host
) {
1101 struct ahc_linux_device
*dev
;
1104 * Since Linux has attached to the device, configure
1105 * it so we don't free and allocate the device
1106 * structure on every command.
1108 dev
= ahc_linux_get_device(ahc
, device
->channel
,
1109 device
->id
, device
->lun
,
1112 dev
->flags
&= ~AHC_DEV_UNCONFIGURED
;
1113 dev
->scsi_device
= device
;
1114 ahc_linux_device_queue_depth(ahc
, dev
);
1115 device
->queue_depth
= dev
->openings
1117 if ((dev
->flags
& (AHC_DEV_Q_BASIC
1118 | AHC_DEV_Q_TAGGED
)) == 0) {
1120 * We allow the OS to queue 2 untagged
1121 * transactions to us at any time even
1122 * though we can only execute them
1123 * serially on the controller/device.
1124 * This should remove some latency.
1126 device
->queue_depth
= 2;
1131 ahc_unlock(ahc
, &flags
);
1135 #if defined(__i386__)
1137 * Return the disk geometry for the given SCSI device.
1140 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
1141 ahc_linux_biosparam(struct scsi_device
*sdev
, struct block_device
*bdev
,
1142 sector_t capacity
, int geom
[])
1146 ahc_linux_biosparam(Disk
*disk
, kdev_t dev
, int geom
[])
1148 struct scsi_device
*sdev
= disk
->device
;
1149 u_long capacity
= disk
->capacity
;
1150 struct buffer_head
*bh
;
1157 struct ahc_softc
*ahc
;
1160 ahc
= *((struct ahc_softc
**)sdev
->host
->hostdata
);
1161 channel
= sdev
->channel
;
1163 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
1164 bh
= scsi_bios_ptable(bdev
);
1165 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17)
1166 bh
= bread(MKDEV(MAJOR(dev
), MINOR(dev
) & ~0xf), 0, block_size(dev
));
1168 bh
= bread(MKDEV(MAJOR(dev
), MINOR(dev
) & ~0xf), 0, 1024);
1172 ret
= scsi_partsize(bh
, capacity
,
1173 &geom
[2], &geom
[0], &geom
[1]);
1174 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
1184 cylinders
= aic_sector_div(capacity
, heads
, sectors
);
1186 if (aic7xxx_extended
!= 0)
1188 else if (channel
== 0)
1189 extended
= (ahc
->flags
& AHC_EXTENDED_TRANS_A
) != 0;
1191 extended
= (ahc
->flags
& AHC_EXTENDED_TRANS_B
) != 0;
1192 if (extended
&& cylinders
>= 1024) {
1195 cylinders
= aic_sector_div(capacity
, heads
, sectors
);
1199 geom
[2] = cylinders
;
1205 * Abort the current SCSI command(s).
1208 ahc_linux_abort(Scsi_Cmnd
*cmd
)
1212 error
= ahc_linux_queue_recovery_cmd(cmd
, SCB_ABORT
);
1214 printf("aic7xxx_abort returns 0x%x\n", error
);
1219 * Attempt to send a target reset message to the device that timed out.
1222 ahc_linux_dev_reset(Scsi_Cmnd
*cmd
)
1226 error
= ahc_linux_queue_recovery_cmd(cmd
, SCB_DEVICE_RESET
);
1228 printf("aic7xxx_dev_reset returns 0x%x\n", error
);
1233 * Reset the SCSI bus.
1236 ahc_linux_bus_reset(Scsi_Cmnd
*cmd
)
1238 struct ahc_softc
*ahc
;
1242 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
1243 ahc_midlayer_entrypoint_lock(ahc
, &s
);
1244 found
= ahc_reset_channel(ahc
, cmd
->device
->channel
+ 'A',
1245 /*initiate reset*/TRUE
);
1246 ahc_linux_run_complete_queue(ahc
);
1247 ahc_midlayer_entrypoint_unlock(ahc
, &s
);
1250 printf("%s: SCSI bus reset delivered. "
1251 "%d SCBs aborted.\n", ahc_name(ahc
), found
);
1256 Scsi_Host_Template aic7xxx_driver_template
= {
1257 .module
= THIS_MODULE
,
1259 .proc_info
= ahc_linux_proc_info
,
1260 .info
= ahc_linux_info
,
1261 .queuecommand
= ahc_linux_queue
,
1262 .eh_abort_handler
= ahc_linux_abort
,
1263 .eh_device_reset_handler
= ahc_linux_dev_reset
,
1264 .eh_bus_reset_handler
= ahc_linux_bus_reset
,
1265 #if defined(__i386__)
1266 .bios_param
= ahc_linux_biosparam
,
1268 .can_queue
= AHC_MAX_QUEUE
,
1271 .use_clustering
= ENABLE_CLUSTERING
,
1272 .slave_alloc
= ahc_linux_slave_alloc
,
1273 .slave_configure
= ahc_linux_slave_configure
,
1274 .slave_destroy
= ahc_linux_slave_destroy
,
1277 /**************************** Tasklet Handler *********************************/
1280 * In 2.4.X and above, this routine is called from a tasklet,
1281 * so we must re-acquire our lock prior to executing this code.
1282 * In all prior kernels, ahc_schedule_runq() calls this routine
1283 * directly and ahc_schedule_runq() is called with our lock held.
1286 ahc_runq_tasklet(unsigned long data
)
1288 struct ahc_softc
* ahc
;
1289 struct ahc_linux_device
*dev
;
1292 ahc
= (struct ahc_softc
*)data
;
1293 ahc_lock(ahc
, &flags
);
1294 while ((dev
= ahc_linux_next_device_to_run(ahc
)) != NULL
) {
1296 TAILQ_REMOVE(&ahc
->platform_data
->device_runq
, dev
, links
);
1297 dev
->flags
&= ~AHC_DEV_ON_RUN_LIST
;
1298 ahc_linux_check_device_queue(ahc
, dev
);
1299 /* Yeild to our interrupt handler */
1300 ahc_unlock(ahc
, &flags
);
1301 ahc_lock(ahc
, &flags
);
1303 ahc_unlock(ahc
, &flags
);
1306 /******************************** Macros **************************************/
1307 #define BUILD_SCSIID(ahc, cmd) \
1308 ((((cmd)->device->id << TID_SHIFT) & TID) \
1309 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
1310 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
1312 /******************************** Bus DMA *************************************/
1314 ahc_dma_tag_create(struct ahc_softc
*ahc
, bus_dma_tag_t parent
,
1315 bus_size_t alignment
, bus_size_t boundary
,
1316 dma_addr_t lowaddr
, dma_addr_t highaddr
,
1317 bus_dma_filter_t
*filter
, void *filterarg
,
1318 bus_size_t maxsize
, int nsegments
,
1319 bus_size_t maxsegsz
, int flags
, bus_dma_tag_t
*ret_tag
)
1323 dmat
= malloc(sizeof(*dmat
), M_DEVBUF
, M_NOWAIT
);
1328 * Linux is very simplistic about DMA memory. For now don't
1329 * maintain all specification information. Once Linux supplies
1330 * better facilities for doing these operations, or the
1331 * needs of this particular driver change, we might need to do
1334 dmat
->alignment
= alignment
;
1335 dmat
->boundary
= boundary
;
1336 dmat
->maxsize
= maxsize
;
1342 ahc_dma_tag_destroy(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
)
1344 free(dmat
, M_DEVBUF
);
1348 ahc_dmamem_alloc(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, void** vaddr
,
1349 int flags
, bus_dmamap_t
*mapp
)
1353 map
= malloc(sizeof(*map
), M_DEVBUF
, M_NOWAIT
);
1357 * Although we can dma data above 4GB, our
1358 * "consistent" memory is below 4GB for
1359 * space efficiency reasons (only need a 4byte
1360 * address). For this reason, we have to reset
1361 * our dma mask when doing allocations.
1363 if (ahc
->dev_softc
!= NULL
)
1364 if (pci_set_dma_mask(ahc
->dev_softc
, 0xFFFFFFFF)) {
1365 printk(KERN_WARNING
"aic7xxx: No suitable DMA available.\n");
1369 *vaddr
= pci_alloc_consistent(ahc
->dev_softc
,
1370 dmat
->maxsize
, &map
->bus_addr
);
1371 if (ahc
->dev_softc
!= NULL
)
1372 if (pci_set_dma_mask(ahc
->dev_softc
,
1373 ahc
->platform_data
->hw_dma_mask
)) {
1374 printk(KERN_WARNING
"aic7xxx: No suitable DMA available.\n");
1385 ahc_dmamem_free(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
,
1386 void* vaddr
, bus_dmamap_t map
)
1388 pci_free_consistent(ahc
->dev_softc
, dmat
->maxsize
,
1389 vaddr
, map
->bus_addr
);
1393 ahc_dmamap_load(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
,
1394 void *buf
, bus_size_t buflen
, bus_dmamap_callback_t
*cb
,
1395 void *cb_arg
, int flags
)
1398 * Assume for now that this will only be used during
1399 * initialization and not for per-transaction buffer mapping.
1401 bus_dma_segment_t stack_sg
;
1403 stack_sg
.ds_addr
= map
->bus_addr
;
1404 stack_sg
.ds_len
= dmat
->maxsize
;
1405 cb(cb_arg
, &stack_sg
, /*nseg*/1, /*error*/0);
1410 ahc_dmamap_destroy(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
)
1413 * The map may is NULL in our < 2.3.X implementation.
1414 * Now it's 2.6.5, but just in case...
1416 BUG_ON(map
== NULL
);
1417 free(map
, M_DEVBUF
);
1421 ahc_dmamap_unload(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
)
1427 /********************* Platform Dependent Functions ***************************/
1429 * Compare "left hand" softc with "right hand" softc, returning:
1430 * < 0 - lahc has a lower priority than rahc
1431 * 0 - Softcs are equal
1432 * > 0 - lahc has a higher priority than rahc
1435 ahc_softc_comp(struct ahc_softc
*lahc
, struct ahc_softc
*rahc
)
1442 * Under Linux, cards are ordered as follows:
1443 * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
1444 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
1445 * 3) All remaining VLB/EISA devices sorted by ioport.
1446 * 4) All remaining PCI devices sorted by bus/slot/func.
1448 value
= (lahc
->flags
& AHC_BIOS_ENABLED
)
1449 - (rahc
->flags
& AHC_BIOS_ENABLED
);
1451 /* Controllers with BIOS enabled have a *higher* priority */
1455 * Same BIOS setting, now sort based on bus type.
1456 * EISA and VL controllers sort together. EISA/VL
1457 * have higher priority than PCI.
1459 rvalue
= (rahc
->chip
& AHC_BUS_MASK
);
1460 if (rvalue
== AHC_VL
)
1462 lvalue
= (lahc
->chip
& AHC_BUS_MASK
);
1463 if (lvalue
== AHC_VL
)
1465 value
= rvalue
- lvalue
;
1469 /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
1474 char primary_channel
;
1476 if (aic7xxx_reverse_scan
!= 0)
1477 value
= ahc_get_pci_bus(lahc
->dev_softc
)
1478 - ahc_get_pci_bus(rahc
->dev_softc
);
1480 value
= ahc_get_pci_bus(rahc
->dev_softc
)
1481 - ahc_get_pci_bus(lahc
->dev_softc
);
1484 if (aic7xxx_reverse_scan
!= 0)
1485 value
= ahc_get_pci_slot(lahc
->dev_softc
)
1486 - ahc_get_pci_slot(rahc
->dev_softc
);
1488 value
= ahc_get_pci_slot(rahc
->dev_softc
)
1489 - ahc_get_pci_slot(lahc
->dev_softc
);
1493 * On multi-function devices, the user can choose
1494 * to have function 1 probed before function 0.
1495 * Give whichever channel is the primary channel
1496 * the highest priority.
1498 primary_channel
= (lahc
->flags
& AHC_PRIMARY_CHANNEL
) + 'A';
1500 if (lahc
->channel
== primary_channel
)
1506 if ((rahc
->flags
& AHC_BIOS_ENABLED
) != 0) {
1507 value
= rahc
->platform_data
->bios_address
1508 - lahc
->platform_data
->bios_address
;
1510 value
= rahc
->bsh
.ioport
1515 panic("ahc_softc_sort: invalid bus type");
1521 ahc_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(aic7xxx_tag_info
); i
++) {
1529 for (j
= 0; j
< AHC_NUM_TARGETS
; j
++) {
1530 aic7xxx_tag_info
[i
].tag_commands
[j
] = tags
;
1536 ahc_linux_setup_tag_info(u_long arg
, int instance
, int targ
, int32_t value
)
1539 if ((instance
>= 0) && (targ
>= 0)
1540 && (instance
< NUM_ELEMENTS(aic7xxx_tag_info
))
1541 && (targ
< AHC_NUM_TARGETS
)) {
1542 aic7xxx_tag_info
[instance
].tag_commands
[targ
] = value
& 0xff;
1544 printf("tag_info[%d:%d] = %d\n", instance
, targ
, value
);
1549 ahc_linux_setup_dv(u_long arg
, int instance
, int targ
, int32_t value
)
1553 && (instance
< NUM_ELEMENTS(aic7xxx_dv_settings
))) {
1554 aic7xxx_dv_settings
[instance
] = value
;
1556 printf("dv[%d] = %d\n", instance
, value
);
1561 * Handle Linux boot parameters. This routine allows for assigning a value
1562 * to a parameter with a ':' between the parameter and the value.
1563 * ie. aic7xxx=stpwlev:1,extended
1566 aic7xxx_setup(char *s
)
1576 { "extended", &aic7xxx_extended
},
1577 { "no_reset", &aic7xxx_no_reset
},
1578 { "verbose", &aic7xxx_verbose
},
1579 { "allow_memio", &aic7xxx_allow_memio
},
1581 { "debug", &ahc_debug
},
1583 { "reverse_scan", &aic7xxx_reverse_scan
},
1584 { "no_probe", &aic7xxx_probe_eisa_vl
},
1585 { "probe_eisa_vl", &aic7xxx_probe_eisa_vl
},
1586 { "periodic_otag", &aic7xxx_periodic_otag
},
1587 { "pci_parity", &aic7xxx_pci_parity
},
1588 { "seltime", &aic7xxx_seltime
},
1589 { "tag_info", NULL
},
1590 { "global_tag_depth", NULL
},
1594 end
= strchr(s
, '\0');
1597 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1598 * will never be 0 in this case.
1602 while ((p
= strsep(&s
, ",.")) != NULL
) {
1605 for (i
= 0; i
< NUM_ELEMENTS(options
); i
++) {
1607 n
= strlen(options
[i
].name
);
1608 if (strncmp(options
[i
].name
, p
, n
) == 0)
1611 if (i
== NUM_ELEMENTS(options
))
1614 if (strncmp(p
, "global_tag_depth", n
) == 0) {
1615 ahc_linux_setup_tag_info_global(p
+ n
);
1616 } else if (strncmp(p
, "tag_info", n
) == 0) {
1617 s
= aic_parse_brace_option("tag_info", p
+ n
, end
,
1618 2, ahc_linux_setup_tag_info
, 0);
1619 } else if (strncmp(p
, "dv", n
) == 0) {
1620 s
= aic_parse_brace_option("dv", p
+ n
, end
, 1,
1621 ahc_linux_setup_dv
, 0);
1622 } else if (p
[n
] == ':') {
1623 *(options
[i
].flag
) = simple_strtoul(p
+ n
+ 1, NULL
, 0);
1624 } else if (strncmp(p
, "verbose", n
) == 0) {
1625 *(options
[i
].flag
) = 1;
1627 *(options
[i
].flag
) ^= 0xFFFFFFFF;
1633 __setup("aic7xxx=", aic7xxx_setup
);
1635 uint32_t aic7xxx_verbose
;
1638 ahc_linux_register_host(struct ahc_softc
*ahc
, Scsi_Host_Template
*template)
1641 struct Scsi_Host
*host
;
1646 template->name
= ahc
->description
;
1647 host
= scsi_host_alloc(template, sizeof(struct ahc_softc
*));
1651 *((struct ahc_softc
**)host
->hostdata
) = ahc
;
1653 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
1654 scsi_assign_lock(host
, &ahc
->platform_data
->spin_lock
);
1655 #elif AHC_SCSI_HAS_HOST_LOCK != 0
1656 host
->lock
= &ahc
->platform_data
->spin_lock
;
1658 ahc
->platform_data
->host
= host
;
1659 host
->can_queue
= AHC_MAX_QUEUE
;
1660 host
->cmd_per_lun
= 2;
1661 /* XXX No way to communicate the ID for multiple channels */
1662 host
->this_id
= ahc
->our_id
;
1663 host
->irq
= ahc
->platform_data
->irq
;
1664 host
->max_id
= (ahc
->features
& AHC_WIDE
) ? 16 : 8;
1665 host
->max_lun
= AHC_NUM_LUNS
;
1666 host
->max_channel
= (ahc
->features
& AHC_TWIN
) ? 1 : 0;
1667 host
->sg_tablesize
= AHC_NSEG
;
1668 ahc_set_unit(ahc
, ahc_linux_next_unit());
1669 sprintf(buf
, "scsi%d", host
->host_no
);
1670 new_name
= malloc(strlen(buf
) + 1, M_DEVBUF
, M_NOWAIT
);
1671 if (new_name
!= NULL
) {
1672 strcpy(new_name
, buf
);
1673 ahc_set_name(ahc
, new_name
);
1675 host
->unique_id
= ahc
->unit
;
1676 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
1677 scsi_set_pci_device(host
, ahc
->dev_softc
);
1679 ahc_linux_initialize_scsi_bus(ahc
);
1680 ahc_unlock(ahc
, &s
);
1681 ahc
->platform_data
->dv_pid
= kernel_thread(ahc_linux_dv_thread
, ahc
, 0);
1683 if (ahc
->platform_data
->dv_pid
< 0) {
1684 printf("%s: Failed to create DV thread, error= %d\n",
1685 ahc_name(ahc
), ahc
->platform_data
->dv_pid
);
1686 return (-ahc
->platform_data
->dv_pid
);
1689 * Initially allocate *all* of our linux target objects
1690 * so that the DV thread will scan them all in parallel
1691 * just after driver initialization. Any device that
1692 * does not exist will have its target object destroyed
1693 * by the selection timeout handler. In the case of a
1694 * device that appears after the initial DV scan, async
1695 * negotiation will occur for the first command, and DV
1696 * will comence should that first command be successful.
1698 for (targ_offset
= 0;
1699 targ_offset
< host
->max_id
* (host
->max_channel
+ 1);
1705 target
= targ_offset
;
1707 && (ahc
->features
& AHC_TWIN
) != 0) {
1712 * Skip our own ID. Some Compaq/HP storage devices
1713 * have enclosure management devices that respond to
1714 * single bit selection (i.e. selecting ourselves).
1715 * It is expected that either an external application
1716 * or a modified kernel will be used to probe this
1717 * ID if it is appropriate. To accommodate these
1718 * installations, ahc_linux_alloc_target() will allocate
1719 * for our ID if asked to do so.
1721 if ((channel
== 0 && target
== ahc
->our_id
)
1722 || (channel
== 1 && target
== ahc
->our_id_b
))
1725 ahc_linux_alloc_target(ahc
, channel
, target
);
1727 ahc_intr_enable(ahc
, TRUE
);
1728 ahc_linux_start_dv(ahc
);
1729 ahc_unlock(ahc
, &s
);
1731 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
1732 scsi_add_host(host
, (ahc
->dev_softc
? &ahc
->dev_softc
->dev
: NULL
)); /* XXX handle failure */
1733 scsi_scan_host(host
);
1739 ahc_linux_get_memsize(void)
1744 return ((uint64_t)si
.totalram
<< PAGE_SHIFT
);
1748 * Find the smallest available unit number to use
1749 * for a new device. We don't just use a static
1750 * count to handle the "repeated hot-(un)plug"
1754 ahc_linux_next_unit(void)
1756 struct ahc_softc
*ahc
;
1761 TAILQ_FOREACH(ahc
, &ahc_tailq
, links
) {
1762 if (ahc
->unit
== unit
) {
1771 * Place the SCSI bus into a known state by either resetting it,
1772 * or forcing transfer negotiations on the next command to any
1776 ahc_linux_initialize_scsi_bus(struct ahc_softc
*ahc
)
1784 if (aic7xxx_no_reset
!= 0)
1785 ahc
->flags
&= ~(AHC_RESET_BUS_A
|AHC_RESET_BUS_B
);
1787 if ((ahc
->flags
& AHC_RESET_BUS_A
) != 0)
1788 ahc_reset_channel(ahc
, 'A', /*initiate_reset*/TRUE
);
1790 numtarg
= (ahc
->features
& AHC_WIDE
) ? 16 : 8;
1792 if ((ahc
->features
& AHC_TWIN
) != 0) {
1794 if ((ahc
->flags
& AHC_RESET_BUS_B
) != 0) {
1795 ahc_reset_channel(ahc
, 'B', /*initiate_reset*/TRUE
);
1804 * Force negotiation to async for all targets that
1805 * will not see an initial bus reset.
1807 for (; i
< numtarg
; i
++) {
1808 struct ahc_devinfo devinfo
;
1809 struct ahc_initiator_tinfo
*tinfo
;
1810 struct ahc_tmode_tstate
*tstate
;
1816 our_id
= ahc
->our_id
;
1818 if (i
> 7 && (ahc
->features
& AHC_TWIN
) != 0) {
1820 our_id
= ahc
->our_id_b
;
1823 tinfo
= ahc_fetch_transinfo(ahc
, channel
, our_id
,
1824 target_id
, &tstate
);
1825 ahc_compile_devinfo(&devinfo
, our_id
, target_id
,
1826 CAM_LUN_WILDCARD
, channel
, ROLE_INITIATOR
);
1827 ahc_update_neg_request(ahc
, &devinfo
, tstate
,
1828 tinfo
, AHC_NEG_ALWAYS
);
1830 /* Give the bus some time to recover */
1831 if ((ahc
->flags
& (AHC_RESET_BUS_A
|AHC_RESET_BUS_B
)) != 0) {
1832 ahc_linux_freeze_simq(ahc
);
1833 init_timer(&ahc
->platform_data
->reset_timer
);
1834 ahc
->platform_data
->reset_timer
.data
= (u_long
)ahc
;
1835 ahc
->platform_data
->reset_timer
.expires
=
1836 jiffies
+ (AIC7XXX_RESET_DELAY
* HZ
)/1000;
1837 ahc
->platform_data
->reset_timer
.function
=
1838 ahc_linux_release_simq
;
1839 add_timer(&ahc
->platform_data
->reset_timer
);
1844 ahc_platform_alloc(struct ahc_softc
*ahc
, void *platform_arg
)
1847 ahc
->platform_data
=
1848 malloc(sizeof(struct ahc_platform_data
), M_DEVBUF
, M_NOWAIT
);
1849 if (ahc
->platform_data
== NULL
)
1851 memset(ahc
->platform_data
, 0, sizeof(struct ahc_platform_data
));
1852 TAILQ_INIT(&ahc
->platform_data
->completeq
);
1853 TAILQ_INIT(&ahc
->platform_data
->device_runq
);
1854 ahc
->platform_data
->irq
= AHC_LINUX_NOIRQ
;
1855 ahc
->platform_data
->hw_dma_mask
= 0xFFFFFFFF;
1857 ahc_done_lockinit(ahc
);
1858 init_timer(&ahc
->platform_data
->completeq_timer
);
1859 ahc
->platform_data
->completeq_timer
.data
= (u_long
)ahc
;
1860 ahc
->platform_data
->completeq_timer
.function
=
1861 (ahc_linux_callback_t
*)ahc_linux_thread_run_complete_queue
;
1862 init_MUTEX_LOCKED(&ahc
->platform_data
->eh_sem
);
1863 init_MUTEX_LOCKED(&ahc
->platform_data
->dv_sem
);
1864 init_MUTEX_LOCKED(&ahc
->platform_data
->dv_cmd_sem
);
1865 tasklet_init(&ahc
->platform_data
->runq_tasklet
, ahc_runq_tasklet
,
1866 (unsigned long)ahc
);
1867 ahc
->seltime
= (aic7xxx_seltime
& 0x3) << 4;
1868 ahc
->seltime_b
= (aic7xxx_seltime
& 0x3) << 4;
1869 if (aic7xxx_pci_parity
== 0)
1870 ahc
->flags
|= AHC_DISABLE_PCI_PERR
;
1876 ahc_platform_free(struct ahc_softc
*ahc
)
1878 struct ahc_linux_target
*targ
;
1879 struct ahc_linux_device
*dev
;
1882 if (ahc
->platform_data
!= NULL
) {
1883 del_timer_sync(&ahc
->platform_data
->completeq_timer
);
1884 ahc_linux_kill_dv_thread(ahc
);
1885 tasklet_kill(&ahc
->platform_data
->runq_tasklet
);
1886 if (ahc
->platform_data
->host
!= NULL
) {
1887 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
1888 scsi_remove_host(ahc
->platform_data
->host
);
1890 scsi_host_put(ahc
->platform_data
->host
);
1893 /* destroy all of the device and target objects */
1894 for (i
= 0; i
< AHC_NUM_TARGETS
; i
++) {
1895 targ
= ahc
->platform_data
->targets
[i
];
1897 /* Keep target around through the loop. */
1899 for (j
= 0; j
< AHC_NUM_LUNS
; j
++) {
1901 if (targ
->devices
[j
] == NULL
)
1903 dev
= targ
->devices
[j
];
1904 ahc_linux_free_device(ahc
, dev
);
1907 * Forcibly free the target now that
1908 * all devices are gone.
1910 ahc_linux_free_target(ahc
, targ
);
1914 if (ahc
->platform_data
->irq
!= AHC_LINUX_NOIRQ
)
1915 free_irq(ahc
->platform_data
->irq
, ahc
);
1916 if (ahc
->tag
== BUS_SPACE_PIO
1917 && ahc
->bsh
.ioport
!= 0)
1918 release_region(ahc
->bsh
.ioport
, 256);
1919 if (ahc
->tag
== BUS_SPACE_MEMIO
1920 && ahc
->bsh
.maddr
!= NULL
) {
1921 iounmap(ahc
->bsh
.maddr
);
1922 release_mem_region(ahc
->platform_data
->mem_busaddr
,
1925 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
1927 * In 2.4 we detach from the scsi midlayer before the PCI
1928 * layer invokes our remove callback. No per-instance
1929 * detach is provided, so we must reach inside the PCI
1930 * subsystem's internals and detach our driver manually.
1932 if (ahc
->dev_softc
!= NULL
)
1933 ahc
->dev_softc
->driver
= NULL
;
1935 free(ahc
->platform_data
, M_DEVBUF
);
1940 ahc_platform_freeze_devq(struct ahc_softc
*ahc
, struct scb
*scb
)
1942 ahc_platform_abort_scbs(ahc
, SCB_GET_TARGET(ahc
, scb
),
1943 SCB_GET_CHANNEL(ahc
, scb
),
1944 SCB_GET_LUN(scb
), SCB_LIST_NULL
,
1945 ROLE_UNKNOWN
, CAM_REQUEUE_REQ
);
1949 ahc_platform_set_tags(struct ahc_softc
*ahc
, struct ahc_devinfo
*devinfo
,
1952 struct ahc_linux_device
*dev
;
1956 dev
= ahc_linux_get_device(ahc
, devinfo
->channel
- 'A',
1958 devinfo
->lun
, /*alloc*/FALSE
);
1961 was_queuing
= dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
);
1964 case AHC_QUEUE_NONE
:
1967 case AHC_QUEUE_BASIC
:
1968 now_queuing
= AHC_DEV_Q_BASIC
;
1970 case AHC_QUEUE_TAGGED
:
1971 now_queuing
= AHC_DEV_Q_TAGGED
;
1974 if ((dev
->flags
& AHC_DEV_FREEZE_TIL_EMPTY
) == 0
1975 && (was_queuing
!= now_queuing
)
1976 && (dev
->active
!= 0)) {
1977 dev
->flags
|= AHC_DEV_FREEZE_TIL_EMPTY
;
1981 dev
->flags
&= ~(AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
|AHC_DEV_PERIODIC_OTAG
);
1985 usertags
= ahc_linux_user_tagdepth(ahc
, devinfo
);
1988 * Start out agressively and allow our
1989 * dynamic queue depth algorithm to take
1992 dev
->maxtags
= usertags
;
1993 dev
->openings
= dev
->maxtags
- dev
->active
;
1995 if (dev
->maxtags
== 0) {
1997 * Queueing is disabled by the user.
2000 } else if (alg
== AHC_QUEUE_TAGGED
) {
2001 dev
->flags
|= AHC_DEV_Q_TAGGED
;
2002 if (aic7xxx_periodic_otag
!= 0)
2003 dev
->flags
|= AHC_DEV_PERIODIC_OTAG
;
2005 dev
->flags
|= AHC_DEV_Q_BASIC
;
2007 /* We can only have one opening. */
2009 dev
->openings
= 1 - dev
->active
;
2011 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
2012 if (dev
->scsi_device
!= NULL
) {
2013 switch ((dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
))) {
2014 case AHC_DEV_Q_BASIC
:
2015 scsi_adjust_queue_depth(dev
->scsi_device
,
2017 dev
->openings
+ dev
->active
);
2019 case AHC_DEV_Q_TAGGED
:
2020 scsi_adjust_queue_depth(dev
->scsi_device
,
2022 dev
->openings
+ dev
->active
);
2026 * We allow the OS to queue 2 untagged transactions to
2027 * us at any time even though we can only execute them
2028 * serially on the controller/device. This should
2029 * remove some latency.
2031 scsi_adjust_queue_depth(dev
->scsi_device
,
2041 ahc_platform_abort_scbs(struct ahc_softc
*ahc
, int target
, char channel
,
2042 int lun
, u_int tag
, role_t role
, uint32_t status
)
2052 if (tag
!= SCB_LIST_NULL
)
2056 if (channel
!= ALL_CHANNELS
) {
2057 chan
= channel
- 'A';
2060 maxchan
= (ahc
->features
& AHC_TWIN
) ? 2 : 1;
2063 if (target
!= CAM_TARGET_WILDCARD
) {
2067 maxtarg
= (ahc
->features
& AHC_WIDE
) ? 16 : 8;
2070 if (lun
!= CAM_LUN_WILDCARD
) {
2074 maxlun
= AHC_NUM_LUNS
;
2078 for (; chan
< maxchan
; chan
++) {
2080 for (; targ
< maxtarg
; targ
++) {
2082 for (; clun
< maxlun
; clun
++) {
2083 struct ahc_linux_device
*dev
;
2084 struct ahc_busyq
*busyq
;
2085 struct ahc_cmd
*acmd
;
2087 dev
= ahc_linux_get_device(ahc
, chan
,
2093 busyq
= &dev
->busyq
;
2094 while ((acmd
= TAILQ_FIRST(busyq
)) != NULL
) {
2097 cmd
= &acmd_scsi_cmd(acmd
);
2098 TAILQ_REMOVE(busyq
, acmd
,
2101 cmd
->result
= status
<< 16;
2102 ahc_linux_queue_cmd_complete(ahc
, cmd
);
2112 ahc_linux_thread_run_complete_queue(struct ahc_softc
*ahc
)
2116 ahc_lock(ahc
, &flags
);
2117 del_timer(&ahc
->platform_data
->completeq_timer
);
2118 ahc
->platform_data
->flags
&= ~AHC_RUN_CMPLT_Q_TIMER
;
2119 ahc_linux_run_complete_queue(ahc
);
2120 ahc_unlock(ahc
, &flags
);
2124 ahc_linux_start_dv(struct ahc_softc
*ahc
)
2128 * Freeze the simq and signal ahc_linux_queue to not let any
2129 * more commands through.
2131 if ((ahc
->platform_data
->flags
& AHC_DV_ACTIVE
) == 0) {
2133 if (ahc_debug
& AHC_SHOW_DV
)
2134 printf("%s: Waking DV thread\n", ahc_name(ahc
));
2137 ahc
->platform_data
->flags
|= AHC_DV_ACTIVE
;
2138 ahc_linux_freeze_simq(ahc
);
2140 /* Wake up the DV kthread */
2141 up(&ahc
->platform_data
->dv_sem
);
2146 ahc_linux_kill_dv_thread(struct ahc_softc
*ahc
)
2151 if (ahc
->platform_data
->dv_pid
!= 0) {
2152 ahc
->platform_data
->flags
|= AHC_DV_SHUTDOWN
;
2153 ahc_unlock(ahc
, &s
);
2154 up(&ahc
->platform_data
->dv_sem
);
2157 * Use the eh_sem as an indicator that the
2158 * dv thread is exiting. Note that the dv
2159 * thread must still return after performing
2160 * the up on our semaphore before it has
2161 * completely exited this module. Unfortunately,
2162 * there seems to be no easy way to wait for the
2163 * exit of a thread for which you are not the
2164 * parent (dv threads are parented by init).
2165 * Cross your fingers...
2167 down(&ahc
->platform_data
->eh_sem
);
2170 * Mark the dv thread as already dead. This
2171 * avoids attempting to kill it a second time.
2172 * This is necessary because we must kill the
2173 * DV thread before calling ahc_free() in the
2174 * module shutdown case to avoid bogus locking
2175 * in the SCSI mid-layer, but we ahc_free() is
2176 * called without killing the DV thread in the
2177 * instance detach case, so ahc_platform_free()
2178 * calls us again to verify that the DV thread
2181 ahc
->platform_data
->dv_pid
= 0;
2183 ahc_unlock(ahc
, &s
);
2188 ahc_linux_dv_thread(void *data
)
2190 struct ahc_softc
*ahc
;
2194 ahc
= (struct ahc_softc
*)data
;
2197 if (ahc_debug
& AHC_SHOW_DV
)
2198 printf("Launching DV Thread\n");
2202 * Complete thread creation.
2205 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
2207 * Don't care about any signals.
2209 siginitsetinv(¤t
->blocked
, 0);
2212 sprintf(current
->comm
, "ahc_dv_%d", ahc
->unit
);
2214 daemonize("ahc_dv_%d", ahc
->unit
);
2215 current
->flags
|= PF_FREEZE
;
2221 * Use down_interruptible() rather than down() to
2222 * avoid inclusion in the load average.
2224 down_interruptible(&ahc
->platform_data
->dv_sem
);
2226 /* Check to see if we've been signaled to exit */
2228 if ((ahc
->platform_data
->flags
& AHC_DV_SHUTDOWN
) != 0) {
2229 ahc_unlock(ahc
, &s
);
2232 ahc_unlock(ahc
, &s
);
2235 if (ahc_debug
& AHC_SHOW_DV
)
2236 printf("%s: Beginning Domain Validation\n",
2241 * Wait for any pending commands to drain before proceeding.
2244 while (LIST_FIRST(&ahc
->pending_scbs
) != NULL
) {
2245 ahc
->platform_data
->flags
|= AHC_DV_WAIT_SIMQ_EMPTY
;
2246 ahc_unlock(ahc
, &s
);
2247 down_interruptible(&ahc
->platform_data
->dv_sem
);
2252 * Wait for the SIMQ to be released so that DV is the
2253 * only reason the queue is frozen.
2255 while (AHC_DV_SIMQ_FROZEN(ahc
) == 0) {
2256 ahc
->platform_data
->flags
|= AHC_DV_WAIT_SIMQ_RELEASE
;
2257 ahc_unlock(ahc
, &s
);
2258 down_interruptible(&ahc
->platform_data
->dv_sem
);
2261 ahc_unlock(ahc
, &s
);
2263 for (target
= 0; target
< AHC_NUM_TARGETS
; target
++)
2264 ahc_linux_dv_target(ahc
, target
);
2267 ahc
->platform_data
->flags
&= ~AHC_DV_ACTIVE
;
2268 ahc_unlock(ahc
, &s
);
2271 * Release the SIMQ so that normal commands are
2272 * allowed to continue on the bus.
2274 ahc_linux_release_simq((u_long
)ahc
);
2276 up(&ahc
->platform_data
->eh_sem
);
2280 #define AHC_LINUX_DV_INQ_SHORT_LEN 36
2281 #define AHC_LINUX_DV_INQ_LEN 256
2282 #define AHC_LINUX_DV_TIMEOUT (HZ / 4)
2284 #define AHC_SET_DV_STATE(ahc, targ, newstate) \
2285 ahc_set_dv_state(ahc, targ, newstate, __LINE__)
2287 static __inline
void
2288 ahc_set_dv_state(struct ahc_softc
*ahc
, struct ahc_linux_target
*targ
,
2289 ahc_dv_state newstate
, u_int line
)
2291 ahc_dv_state oldstate
;
2293 oldstate
= targ
->dv_state
;
2295 if (ahc_debug
& AHC_SHOW_DV
)
2296 printf("%s:%d: Going from state %d to state %d\n",
2297 ahc_name(ahc
), line
, oldstate
, newstate
);
2300 if (oldstate
== newstate
)
2301 targ
->dv_state_retry
++;
2303 targ
->dv_state_retry
= 0;
2304 targ
->dv_state
= newstate
;
2308 ahc_linux_dv_target(struct ahc_softc
*ahc
, u_int target_offset
)
2310 struct ahc_devinfo devinfo
;
2311 struct ahc_linux_target
*targ
;
2312 struct scsi_cmnd
*cmd
;
2313 struct scsi_device
*scsi_dev
;
2314 struct scsi_sense_data
*sense
;
2324 targ
= ahc
->platform_data
->targets
[target_offset
];
2325 if (targ
== NULL
|| (targ
->flags
& AHC_DV_REQUIRED
) == 0) {
2326 ahc_unlock(ahc
, &s
);
2329 ahc_compile_devinfo(&devinfo
,
2330 targ
->channel
== 0 ? ahc
->our_id
: ahc
->our_id_b
,
2331 targ
->target
, /*lun*/0, targ
->channel
+ 'A',
2334 if (ahc_debug
& AHC_SHOW_DV
) {
2335 ahc_print_devinfo(ahc
, &devinfo
);
2336 printf("Performing DV\n");
2340 ahc_unlock(ahc
, &s
);
2342 cmd
= malloc(sizeof(struct scsi_cmnd
), M_DEVBUF
, M_WAITOK
);
2343 scsi_dev
= malloc(sizeof(struct scsi_device
), M_DEVBUF
, M_WAITOK
);
2344 scsi_dev
->host
= ahc
->platform_data
->host
;
2345 scsi_dev
->id
= devinfo
.target
;
2346 scsi_dev
->lun
= devinfo
.lun
;
2347 scsi_dev
->channel
= devinfo
.channel
- 'A';
2348 ahc
->platform_data
->dv_scsi_dev
= scsi_dev
;
2350 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_INQ_SHORT_ASYNC
);
2352 while (targ
->dv_state
!= AHC_DV_STATE_EXIT
) {
2353 timeout
= AHC_LINUX_DV_TIMEOUT
;
2354 switch (targ
->dv_state
) {
2355 case AHC_DV_STATE_INQ_SHORT_ASYNC
:
2356 case AHC_DV_STATE_INQ_ASYNC
:
2357 case AHC_DV_STATE_INQ_ASYNC_VERIFY
:
2359 * Set things to async narrow to reduce the
2360 * chance that the INQ will fail.
2363 ahc_set_syncrate(ahc
, &devinfo
, NULL
, 0, 0, 0,
2364 AHC_TRANS_GOAL
, /*paused*/FALSE
);
2365 ahc_set_width(ahc
, &devinfo
, MSG_EXT_WDTR_BUS_8_BIT
,
2366 AHC_TRANS_GOAL
, /*paused*/FALSE
);
2367 ahc_unlock(ahc
, &s
);
2369 targ
->flags
&= ~AHC_INQ_VALID
;
2371 case AHC_DV_STATE_INQ_VERIFY
:
2375 if (targ
->dv_state
== AHC_DV_STATE_INQ_SHORT_ASYNC
)
2376 inq_len
= AHC_LINUX_DV_INQ_SHORT_LEN
;
2378 inq_len
= targ
->inq_data
->additional_length
+ 5;
2379 ahc_linux_dv_inq(ahc
, cmd
, &devinfo
, targ
, inq_len
);
2382 case AHC_DV_STATE_TUR
:
2383 case AHC_DV_STATE_BUSY
:
2385 ahc_linux_dv_tur(ahc
, cmd
, &devinfo
);
2387 case AHC_DV_STATE_REBD
:
2388 ahc_linux_dv_rebd(ahc
, cmd
, &devinfo
, targ
);
2390 case AHC_DV_STATE_WEB
:
2391 ahc_linux_dv_web(ahc
, cmd
, &devinfo
, targ
);
2394 case AHC_DV_STATE_REB
:
2395 ahc_linux_dv_reb(ahc
, cmd
, &devinfo
, targ
);
2398 case AHC_DV_STATE_SU
:
2399 ahc_linux_dv_su(ahc
, cmd
, &devinfo
, targ
);
2404 ahc_print_devinfo(ahc
, &devinfo
);
2405 printf("Unknown DV state %d\n", targ
->dv_state
);
2409 /* Queue the command and wait for it to complete */
2410 /* Abuse eh_timeout in the scsi_cmnd struct for our purposes */
2411 init_timer(&cmd
->eh_timeout
);
2413 if ((ahc_debug
& AHC_SHOW_MESSAGES
) != 0)
2415 * All of the printfs during negotiation
2416 * really slow down the negotiation.
2417 * Add a bit of time just to be safe.
2421 scsi_add_timer(cmd
, timeout
, ahc_linux_dv_timeout
);
2423 * In 2.5.X, it is assumed that all calls from the
2424 * "midlayer" (which we are emulating) will have the
2425 * ahc host lock held. For other kernels, the
2426 * io_request_lock must be held.
2428 #if AHC_SCSI_HAS_HOST_LOCK != 0
2431 spin_lock_irqsave(&io_request_lock
, s
);
2433 ahc_linux_queue(cmd
, ahc_linux_dv_complete
);
2434 #if AHC_SCSI_HAS_HOST_LOCK != 0
2435 ahc_unlock(ahc
, &s
);
2437 spin_unlock_irqrestore(&io_request_lock
, s
);
2439 down_interruptible(&ahc
->platform_data
->dv_cmd_sem
);
2441 * Wait for the SIMQ to be released so that DV is the
2442 * only reason the queue is frozen.
2445 while (AHC_DV_SIMQ_FROZEN(ahc
) == 0) {
2446 ahc
->platform_data
->flags
|= AHC_DV_WAIT_SIMQ_RELEASE
;
2447 ahc_unlock(ahc
, &s
);
2448 down_interruptible(&ahc
->platform_data
->dv_sem
);
2451 ahc_unlock(ahc
, &s
);
2453 ahc_linux_dv_transition(ahc
, cmd
, &devinfo
, targ
);
2457 if ((targ
->flags
& AHC_INQ_VALID
) != 0
2458 && ahc_linux_get_device(ahc
, devinfo
.channel
- 'A',
2459 devinfo
.target
, devinfo
.lun
,
2460 /*alloc*/FALSE
) == NULL
) {
2462 * The DV state machine failed to configure this device.
2463 * This is normal if DV is disabled. Since we have inquiry
2464 * data, filter it and use the "optimistic" negotiation
2465 * parameters found in the inquiry string.
2467 ahc_linux_filter_inquiry(ahc
, &devinfo
);
2468 if ((targ
->flags
& (AHC_BASIC_DV
|AHC_ENHANCED_DV
)) != 0) {
2469 ahc_print_devinfo(ahc
, &devinfo
);
2470 printf("DV failed to configure device. "
2471 "Please file a bug report against "
2477 free(cmd
, M_DEVBUF
);
2479 if (ahc
->platform_data
->dv_scsi_dev
!= NULL
) {
2480 free(ahc
->platform_data
->dv_scsi_dev
, M_DEVBUF
);
2481 ahc
->platform_data
->dv_scsi_dev
= NULL
;
2485 if (targ
->dv_buffer
!= NULL
) {
2486 free(targ
->dv_buffer
, M_DEVBUF
);
2487 targ
->dv_buffer
= NULL
;
2489 if (targ
->dv_buffer1
!= NULL
) {
2490 free(targ
->dv_buffer1
, M_DEVBUF
);
2491 targ
->dv_buffer1
= NULL
;
2493 targ
->flags
&= ~AHC_DV_REQUIRED
;
2494 if (targ
->refcount
== 0)
2495 ahc_linux_free_target(ahc
, targ
);
2496 ahc_unlock(ahc
, &s
);
2500 ahc_linux_dv_transition(struct ahc_softc
*ahc
, struct scsi_cmnd
*cmd
,
2501 struct ahc_devinfo
*devinfo
,
2502 struct ahc_linux_target
*targ
)
2506 status
= aic_error_action(cmd
, targ
->inq_data
,
2507 ahc_cmd_get_transaction_status(cmd
),
2508 ahc_cmd_get_scsi_status(cmd
));
2511 if (ahc_debug
& AHC_SHOW_DV
) {
2512 ahc_print_devinfo(ahc
, devinfo
);
2513 printf("Entering ahc_linux_dv_transition, state= %d, "
2514 "status= 0x%x, cmd->result= 0x%x\n", targ
->dv_state
,
2515 status
, cmd
->result
);
2519 switch (targ
->dv_state
) {
2520 case AHC_DV_STATE_INQ_SHORT_ASYNC
:
2521 case AHC_DV_STATE_INQ_ASYNC
:
2522 switch (status
& SS_MASK
) {
2525 AHC_SET_DV_STATE(ahc
, targ
, targ
->dv_state
+1);
2528 case SS_INQ_REFRESH
:
2529 AHC_SET_DV_STATE(ahc
, targ
,
2530 AHC_DV_STATE_INQ_SHORT_ASYNC
);
2534 AHC_SET_DV_STATE(ahc
, targ
, targ
->dv_state
);
2535 if (ahc_cmd_get_transaction_status(cmd
)
2537 targ
->dv_state_retry
--;
2538 if ((status
& SS_ERRMASK
) == EBUSY
)
2539 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_BUSY
);
2540 if (targ
->dv_state_retry
< 10)
2544 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2546 if (ahc_debug
& AHC_SHOW_DV
) {
2547 ahc_print_devinfo(ahc
, devinfo
);
2548 printf("Failed DV inquiry, skipping\n");
2554 case AHC_DV_STATE_INQ_ASYNC_VERIFY
:
2555 switch (status
& SS_MASK
) {
2561 if (memcmp(targ
->inq_data
, targ
->dv_buffer
,
2562 AHC_LINUX_DV_INQ_LEN
) != 0) {
2564 * Inquiry data must have changed.
2565 * Try from the top again.
2567 AHC_SET_DV_STATE(ahc
, targ
,
2568 AHC_DV_STATE_INQ_SHORT_ASYNC
);
2572 AHC_SET_DV_STATE(ahc
, targ
, targ
->dv_state
+1);
2573 targ
->flags
|= AHC_INQ_VALID
;
2574 if (ahc_linux_user_dv_setting(ahc
) == 0)
2577 xportflags
= targ
->inq_data
->flags
;
2578 if ((xportflags
& (SID_Sync
|SID_WBus16
)) == 0)
2581 spi3data
= targ
->inq_data
->spi3data
;
2582 switch (spi3data
& SID_SPI_CLOCK_DT_ST
) {
2584 case SID_SPI_CLOCK_ST
:
2585 /* Assume only basic DV is supported. */
2586 targ
->flags
|= AHC_BASIC_DV
;
2588 case SID_SPI_CLOCK_DT
:
2589 case SID_SPI_CLOCK_DT_ST
:
2590 targ
->flags
|= AHC_ENHANCED_DV
;
2595 case SS_INQ_REFRESH
:
2596 AHC_SET_DV_STATE(ahc
, targ
,
2597 AHC_DV_STATE_INQ_SHORT_ASYNC
);
2601 AHC_SET_DV_STATE(ahc
, targ
, targ
->dv_state
);
2602 if (ahc_cmd_get_transaction_status(cmd
)
2604 targ
->dv_state_retry
--;
2606 if ((status
& SS_ERRMASK
) == EBUSY
)
2607 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_BUSY
);
2608 if (targ
->dv_state_retry
< 10)
2612 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2614 if (ahc_debug
& AHC_SHOW_DV
) {
2615 ahc_print_devinfo(ahc
, devinfo
);
2616 printf("Failed DV inquiry, skipping\n");
2622 case AHC_DV_STATE_INQ_VERIFY
:
2623 switch (status
& SS_MASK
) {
2627 if (memcmp(targ
->inq_data
, targ
->dv_buffer
,
2628 AHC_LINUX_DV_INQ_LEN
) == 0) {
2629 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2633 if (ahc_debug
& AHC_SHOW_DV
) {
2636 ahc_print_devinfo(ahc
, devinfo
);
2637 printf("Inquiry buffer mismatch:");
2638 for (i
= 0; i
< AHC_LINUX_DV_INQ_LEN
; i
++) {
2641 printf("0x%x:0x0%x ",
2642 ((uint8_t *)targ
->inq_data
)[i
],
2643 targ
->dv_buffer
[i
]);
2649 if (ahc_linux_fallback(ahc
, devinfo
) != 0) {
2650 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2654 * Do not count "falling back"
2655 * against our retries.
2657 targ
->dv_state_retry
= 0;
2658 AHC_SET_DV_STATE(ahc
, targ
, targ
->dv_state
);
2661 case SS_INQ_REFRESH
:
2662 AHC_SET_DV_STATE(ahc
, targ
,
2663 AHC_DV_STATE_INQ_SHORT_ASYNC
);
2667 AHC_SET_DV_STATE(ahc
, targ
, targ
->dv_state
);
2668 if (ahc_cmd_get_transaction_status(cmd
)
2669 == CAM_REQUEUE_REQ
) {
2670 targ
->dv_state_retry
--;
2671 } else if ((status
& SSQ_FALLBACK
) != 0) {
2672 if (ahc_linux_fallback(ahc
, devinfo
) != 0) {
2673 AHC_SET_DV_STATE(ahc
, targ
,
2678 * Do not count "falling back"
2679 * against our retries.
2681 targ
->dv_state_retry
= 0;
2682 } else if ((status
& SS_ERRMASK
) == EBUSY
)
2683 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_BUSY
);
2684 if (targ
->dv_state_retry
< 10)
2688 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2690 if (ahc_debug
& AHC_SHOW_DV
) {
2691 ahc_print_devinfo(ahc
, devinfo
);
2692 printf("Failed DV inquiry, skipping\n");
2699 case AHC_DV_STATE_TUR
:
2700 switch (status
& SS_MASK
) {
2702 if ((targ
->flags
& AHC_BASIC_DV
) != 0) {
2703 ahc_linux_filter_inquiry(ahc
, devinfo
);
2704 AHC_SET_DV_STATE(ahc
, targ
,
2705 AHC_DV_STATE_INQ_VERIFY
);
2706 } else if ((targ
->flags
& AHC_ENHANCED_DV
) != 0) {
2707 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_REBD
);
2709 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2714 if ((status
& SS_ERRMASK
) == EBUSY
) {
2715 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_BUSY
);
2718 AHC_SET_DV_STATE(ahc
, targ
, targ
->dv_state
);
2719 if (ahc_cmd_get_transaction_status(cmd
)
2720 == CAM_REQUEUE_REQ
) {
2721 targ
->dv_state_retry
--;
2722 } else if ((status
& SSQ_FALLBACK
) != 0) {
2723 if (ahc_linux_fallback(ahc
, devinfo
) != 0) {
2724 AHC_SET_DV_STATE(ahc
, targ
,
2729 * Do not count "falling back"
2730 * against our retries.
2732 targ
->dv_state_retry
= 0;
2734 if (targ
->dv_state_retry
>= 10) {
2736 if (ahc_debug
& AHC_SHOW_DV
) {
2737 ahc_print_devinfo(ahc
, devinfo
);
2738 printf("DV TUR reties exhausted\n");
2741 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2744 if (status
& SSQ_DELAY
)
2749 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_SU
);
2751 case SS_INQ_REFRESH
:
2752 AHC_SET_DV_STATE(ahc
, targ
,
2753 AHC_DV_STATE_INQ_SHORT_ASYNC
);
2756 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2761 case AHC_DV_STATE_REBD
:
2762 switch (status
& SS_MASK
) {
2767 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_WEB
);
2768 echo_size
= scsi_3btoul(&targ
->dv_buffer
[1]);
2769 echo_size
&= 0x1FFF;
2771 if (ahc_debug
& AHC_SHOW_DV
) {
2772 ahc_print_devinfo(ahc
, devinfo
);
2773 printf("Echo buffer size= %d\n", echo_size
);
2776 if (echo_size
== 0) {
2777 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2781 /* Generate the buffer pattern */
2782 targ
->dv_echo_size
= echo_size
;
2783 ahc_linux_generate_dv_pattern(targ
);
2785 * Setup initial negotiation values.
2787 ahc_linux_filter_inquiry(ahc
, devinfo
);
2790 case SS_INQ_REFRESH
:
2791 AHC_SET_DV_STATE(ahc
, targ
,
2792 AHC_DV_STATE_INQ_SHORT_ASYNC
);
2795 AHC_SET_DV_STATE(ahc
, targ
, targ
->dv_state
);
2796 if (ahc_cmd_get_transaction_status(cmd
)
2798 targ
->dv_state_retry
--;
2799 if (targ
->dv_state_retry
<= 10)
2802 if (ahc_debug
& AHC_SHOW_DV
) {
2803 ahc_print_devinfo(ahc
, devinfo
);
2804 printf("DV REBD reties exhausted\n");
2811 * Setup initial negotiation values
2812 * and try level 1 DV.
2814 ahc_linux_filter_inquiry(ahc
, devinfo
);
2815 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_INQ_VERIFY
);
2816 targ
->dv_echo_size
= 0;
2821 case AHC_DV_STATE_WEB
:
2822 switch (status
& SS_MASK
) {
2824 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_REB
);
2826 case SS_INQ_REFRESH
:
2827 AHC_SET_DV_STATE(ahc
, targ
,
2828 AHC_DV_STATE_INQ_SHORT_ASYNC
);
2831 AHC_SET_DV_STATE(ahc
, targ
, targ
->dv_state
);
2832 if (ahc_cmd_get_transaction_status(cmd
)
2833 == CAM_REQUEUE_REQ
) {
2834 targ
->dv_state_retry
--;
2835 } else if ((status
& SSQ_FALLBACK
) != 0) {
2836 if (ahc_linux_fallback(ahc
, devinfo
) != 0) {
2837 AHC_SET_DV_STATE(ahc
, targ
,
2842 * Do not count "falling back"
2843 * against our retries.
2845 targ
->dv_state_retry
= 0;
2847 if (targ
->dv_state_retry
<= 10)
2851 if (ahc_debug
& AHC_SHOW_DV
) {
2852 ahc_print_devinfo(ahc
, devinfo
);
2853 printf("DV WEB reties exhausted\n");
2857 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2862 case AHC_DV_STATE_REB
:
2863 switch (status
& SS_MASK
) {
2865 if (memcmp(targ
->dv_buffer
, targ
->dv_buffer1
,
2866 targ
->dv_echo_size
) != 0) {
2867 if (ahc_linux_fallback(ahc
, devinfo
) != 0)
2868 AHC_SET_DV_STATE(ahc
, targ
,
2871 AHC_SET_DV_STATE(ahc
, targ
,
2876 if (targ
->dv_buffer
!= NULL
) {
2877 free(targ
->dv_buffer
, M_DEVBUF
);
2878 targ
->dv_buffer
= NULL
;
2880 if (targ
->dv_buffer1
!= NULL
) {
2881 free(targ
->dv_buffer1
, M_DEVBUF
);
2882 targ
->dv_buffer1
= NULL
;
2884 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2886 case SS_INQ_REFRESH
:
2887 AHC_SET_DV_STATE(ahc
, targ
,
2888 AHC_DV_STATE_INQ_SHORT_ASYNC
);
2891 AHC_SET_DV_STATE(ahc
, targ
, targ
->dv_state
);
2892 if (ahc_cmd_get_transaction_status(cmd
)
2893 == CAM_REQUEUE_REQ
) {
2894 targ
->dv_state_retry
--;
2895 } else if ((status
& SSQ_FALLBACK
) != 0) {
2896 if (ahc_linux_fallback(ahc
, devinfo
) != 0) {
2897 AHC_SET_DV_STATE(ahc
, targ
,
2901 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_WEB
);
2903 if (targ
->dv_state_retry
<= 10) {
2904 if ((status
& (SSQ_DELAY_RANDOM
|SSQ_DELAY
))!= 0)
2905 msleep(ahc
->our_id
*1000/10);
2909 if (ahc_debug
& AHC_SHOW_DV
) {
2910 ahc_print_devinfo(ahc
, devinfo
);
2911 printf("DV REB reties exhausted\n");
2916 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2921 case AHC_DV_STATE_SU
:
2922 switch (status
& SS_MASK
) {
2924 case SS_INQ_REFRESH
:
2925 AHC_SET_DV_STATE(ahc
, targ
,
2926 AHC_DV_STATE_INQ_SHORT_ASYNC
);
2929 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2934 case AHC_DV_STATE_BUSY
:
2935 switch (status
& SS_MASK
) {
2937 case SS_INQ_REFRESH
:
2938 AHC_SET_DV_STATE(ahc
, targ
,
2939 AHC_DV_STATE_INQ_SHORT_ASYNC
);
2943 AHC_SET_DV_STATE(ahc
, targ
, targ
->dv_state
);
2944 if (ahc_cmd_get_transaction_status(cmd
)
2945 == CAM_REQUEUE_REQ
) {
2946 targ
->dv_state_retry
--;
2947 } else if (targ
->dv_state_retry
< 60) {
2948 if ((status
& SSQ_DELAY
) != 0)
2952 if (ahc_debug
& AHC_SHOW_DV
) {
2953 ahc_print_devinfo(ahc
, devinfo
);
2954 printf("DV BUSY reties exhausted\n");
2957 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2961 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2967 printf("%s: Invalid DV completion state %d\n", ahc_name(ahc
),
2969 AHC_SET_DV_STATE(ahc
, targ
, AHC_DV_STATE_EXIT
);
2975 ahc_linux_dv_fill_cmd(struct ahc_softc
*ahc
, struct scsi_cmnd
*cmd
,
2976 struct ahc_devinfo
*devinfo
)
2978 memset(cmd
, 0, sizeof(struct scsi_cmnd
));
2979 cmd
->device
= ahc
->platform_data
->dv_scsi_dev
;
2980 cmd
->scsi_done
= ahc_linux_dv_complete
;
2984 * Synthesize an inquiry command. On the return trip, it'll be
2985 * sniffed and the device transfer settings set for us.
2988 ahc_linux_dv_inq(struct ahc_softc
*ahc
, struct scsi_cmnd
*cmd
,
2989 struct ahc_devinfo
*devinfo
, struct ahc_linux_target
*targ
,
2990 u_int request_length
)
2994 if (ahc_debug
& AHC_SHOW_DV
) {
2995 ahc_print_devinfo(ahc
, devinfo
);
2996 printf("Sending INQ\n");
2999 if (targ
->inq_data
== NULL
)
3000 targ
->inq_data
= malloc(AHC_LINUX_DV_INQ_LEN
,
3001 M_DEVBUF
, M_WAITOK
);
3002 if (targ
->dv_state
> AHC_DV_STATE_INQ_ASYNC
) {
3003 if (targ
->dv_buffer
!= NULL
)
3004 free(targ
->dv_buffer
, M_DEVBUF
);
3005 targ
->dv_buffer
= malloc(AHC_LINUX_DV_INQ_LEN
,
3006 M_DEVBUF
, M_WAITOK
);
3009 ahc_linux_dv_fill_cmd(ahc
, cmd
, devinfo
);
3010 cmd
->sc_data_direction
= SCSI_DATA_READ
;
3012 cmd
->cmnd
[0] = INQUIRY
;
3013 cmd
->cmnd
[4] = request_length
;
3014 cmd
->request_bufflen
= request_length
;
3015 if (targ
->dv_state
> AHC_DV_STATE_INQ_ASYNC
)
3016 cmd
->request_buffer
= targ
->dv_buffer
;
3018 cmd
->request_buffer
= targ
->inq_data
;
3019 memset(cmd
->request_buffer
, 0, AHC_LINUX_DV_INQ_LEN
);
3023 ahc_linux_dv_tur(struct ahc_softc
*ahc
, struct scsi_cmnd
*cmd
,
3024 struct ahc_devinfo
*devinfo
)
3028 if (ahc_debug
& AHC_SHOW_DV
) {
3029 ahc_print_devinfo(ahc
, devinfo
);
3030 printf("Sending TUR\n");
3033 /* Do a TUR to clear out any non-fatal transitional state */
3034 ahc_linux_dv_fill_cmd(ahc
, cmd
, devinfo
);
3035 cmd
->sc_data_direction
= SCSI_DATA_NONE
;
3037 cmd
->cmnd
[0] = TEST_UNIT_READY
;
3040 #define AHC_REBD_LEN 4
3043 ahc_linux_dv_rebd(struct ahc_softc
*ahc
, struct scsi_cmnd
*cmd
,
3044 struct ahc_devinfo
*devinfo
, struct ahc_linux_target
*targ
)
3048 if (ahc_debug
& AHC_SHOW_DV
) {
3049 ahc_print_devinfo(ahc
, devinfo
);
3050 printf("Sending REBD\n");
3053 if (targ
->dv_buffer
!= NULL
)
3054 free(targ
->dv_buffer
, M_DEVBUF
);
3055 targ
->dv_buffer
= malloc(AHC_REBD_LEN
, M_DEVBUF
, M_WAITOK
);
3056 ahc_linux_dv_fill_cmd(ahc
, cmd
, devinfo
);
3057 cmd
->sc_data_direction
= SCSI_DATA_READ
;
3059 cmd
->cmnd
[0] = READ_BUFFER
;
3060 cmd
->cmnd
[1] = 0x0b;
3061 scsi_ulto3b(AHC_REBD_LEN
, &cmd
->cmnd
[6]);
3062 cmd
->request_bufflen
= AHC_REBD_LEN
;
3063 cmd
->underflow
= cmd
->request_bufflen
;
3064 cmd
->request_buffer
= targ
->dv_buffer
;
3068 ahc_linux_dv_web(struct ahc_softc
*ahc
, struct scsi_cmnd
*cmd
,
3069 struct ahc_devinfo
*devinfo
, struct ahc_linux_target
*targ
)
3073 if (ahc_debug
& AHC_SHOW_DV
) {
3074 ahc_print_devinfo(ahc
, devinfo
);
3075 printf("Sending WEB\n");
3078 ahc_linux_dv_fill_cmd(ahc
, cmd
, devinfo
);
3079 cmd
->sc_data_direction
= SCSI_DATA_WRITE
;
3081 cmd
->cmnd
[0] = WRITE_BUFFER
;
3082 cmd
->cmnd
[1] = 0x0a;
3083 scsi_ulto3b(targ
->dv_echo_size
, &cmd
->cmnd
[6]);
3084 cmd
->request_bufflen
= targ
->dv_echo_size
;
3085 cmd
->underflow
= cmd
->request_bufflen
;
3086 cmd
->request_buffer
= targ
->dv_buffer
;
3090 ahc_linux_dv_reb(struct ahc_softc
*ahc
, struct scsi_cmnd
*cmd
,
3091 struct ahc_devinfo
*devinfo
, struct ahc_linux_target
*targ
)
3095 if (ahc_debug
& AHC_SHOW_DV
) {
3096 ahc_print_devinfo(ahc
, devinfo
);
3097 printf("Sending REB\n");
3100 ahc_linux_dv_fill_cmd(ahc
, cmd
, devinfo
);
3101 cmd
->sc_data_direction
= SCSI_DATA_READ
;
3103 cmd
->cmnd
[0] = READ_BUFFER
;
3104 cmd
->cmnd
[1] = 0x0a;
3105 scsi_ulto3b(targ
->dv_echo_size
, &cmd
->cmnd
[6]);
3106 cmd
->request_bufflen
= targ
->dv_echo_size
;
3107 cmd
->underflow
= cmd
->request_bufflen
;
3108 cmd
->request_buffer
= targ
->dv_buffer1
;
3112 ahc_linux_dv_su(struct ahc_softc
*ahc
, struct scsi_cmnd
*cmd
,
3113 struct ahc_devinfo
*devinfo
,
3114 struct ahc_linux_target
*targ
)
3118 le
= SID_IS_REMOVABLE(targ
->inq_data
) ? SSS_LOEJ
: 0;
3121 if (ahc_debug
& AHC_SHOW_DV
) {
3122 ahc_print_devinfo(ahc
, devinfo
);
3123 printf("Sending SU\n");
3126 ahc_linux_dv_fill_cmd(ahc
, cmd
, devinfo
);
3127 cmd
->sc_data_direction
= SCSI_DATA_NONE
;
3129 cmd
->cmnd
[0] = START_STOP_UNIT
;
3130 cmd
->cmnd
[4] = le
| SSS_START
;
3134 ahc_linux_fallback(struct ahc_softc
*ahc
, struct ahc_devinfo
*devinfo
)
3136 struct ahc_linux_target
*targ
;
3137 struct ahc_initiator_tinfo
*tinfo
;
3138 struct ahc_transinfo
*goal
;
3139 struct ahc_tmode_tstate
*tstate
;
3140 struct ahc_syncrate
*syncrate
;
3149 u_int fallback_speed
;
3152 if (ahc_debug
& AHC_SHOW_DV
) {
3153 ahc_print_devinfo(ahc
, devinfo
);
3154 printf("Trying to fallback\n");
3158 targ
= ahc
->platform_data
->targets
[devinfo
->target_offset
];
3159 tinfo
= ahc_fetch_transinfo(ahc
, devinfo
->channel
,
3160 devinfo
->our_scsiid
,
3161 devinfo
->target
, &tstate
);
3162 goal
= &tinfo
->goal
;
3163 width
= goal
->width
;
3164 period
= goal
->period
;
3165 offset
= goal
->offset
;
3166 ppr_options
= goal
->ppr_options
;
3168 period
= AHC_ASYNC_XFER_PERIOD
;
3169 if (targ
->dv_next_narrow_period
== 0)
3170 targ
->dv_next_narrow_period
= MAX(period
, AHC_SYNCRATE_ULTRA2
);
3171 if (targ
->dv_next_wide_period
== 0)
3172 targ
->dv_next_wide_period
= period
;
3173 if (targ
->dv_max_width
== 0)
3174 targ
->dv_max_width
= width
;
3175 if (targ
->dv_max_ppr_options
== 0)
3176 targ
->dv_max_ppr_options
= ppr_options
;
3177 if (targ
->dv_last_ppr_options
== 0)
3178 targ
->dv_last_ppr_options
= ppr_options
;
3180 cur_speed
= aic_calc_speed(width
, period
, offset
, AHC_SYNCRATE_MIN
);
3181 wide_speed
= aic_calc_speed(MSG_EXT_WDTR_BUS_16_BIT
,
3182 targ
->dv_next_wide_period
,
3185 narrow_speed
= aic_calc_speed(MSG_EXT_WDTR_BUS_8_BIT
,
3186 targ
->dv_next_narrow_period
,
3189 fallback_speed
= aic_calc_speed(width
, period
+1, offset
,
3192 if (ahc_debug
& AHC_SHOW_DV
) {
3193 printf("cur_speed= %d, wide_speed= %d, narrow_speed= %d, "
3194 "fallback_speed= %d\n", cur_speed
, wide_speed
,
3195 narrow_speed
, fallback_speed
);
3199 if (cur_speed
> 160000) {
3201 * Paced/DT/IU_REQ only transfer speeds. All we
3202 * can do is fallback in terms of syncrate.
3205 } else if (cur_speed
> 80000) {
3206 if ((ppr_options
& MSG_EXT_PPR_IU_REQ
) != 0) {
3208 * Try without IU_REQ as it may be confusing
3211 ppr_options
&= ~MSG_EXT_PPR_IU_REQ
;
3214 * Paced/DT only transfer speeds. All we
3215 * can do is fallback in terms of syncrate.
3218 ppr_options
= targ
->dv_max_ppr_options
;
3220 } else if (cur_speed
> 3300) {
3223 * In this range we the following
3224 * options ordered from highest to
3225 * lowest desireability:
3229 * o Narrow at a potentally higher sync rate.
3231 * All modes are tested with and without IU_REQ
3232 * set since using IUs may confuse an expander.
3234 if ((ppr_options
& MSG_EXT_PPR_IU_REQ
) != 0) {
3236 ppr_options
&= ~MSG_EXT_PPR_IU_REQ
;
3237 } else if ((ppr_options
& MSG_EXT_PPR_DT_REQ
) != 0) {
3241 ppr_options
= targ
->dv_max_ppr_options
;
3242 ppr_options
&= ~MSG_EXT_PPR_DT_REQ
;
3243 } else if (targ
->dv_last_ppr_options
!= 0) {
3245 * Try without QAS or any other PPR options.
3246 * We may need a non-PPR message to work with
3247 * an expander. We look at the "last PPR options"
3248 * so we will perform this fallback even if the
3249 * target responded to our PPR negotiation with
3250 * no option bits set.
3253 } else if (width
== MSG_EXT_WDTR_BUS_16_BIT
) {
3255 * If the next narrow speed is greater than
3256 * the next wide speed, fallback to narrow.
3257 * Otherwise fallback to the next DT/Wide setting.
3258 * The narrow async speed will always be smaller
3259 * than the wide async speed, so handle this case
3262 ppr_options
= targ
->dv_max_ppr_options
;
3263 if (narrow_speed
> fallback_speed
3264 || period
>= AHC_ASYNC_XFER_PERIOD
) {
3265 targ
->dv_next_wide_period
= period
+1;
3266 width
= MSG_EXT_WDTR_BUS_8_BIT
;
3267 period
= targ
->dv_next_narrow_period
;
3271 } else if ((ahc
->features
& AHC_WIDE
) != 0
3272 && targ
->dv_max_width
!= 0
3273 && wide_speed
>= fallback_speed
3274 && (targ
->dv_next_wide_period
<= AHC_ASYNC_XFER_PERIOD
3275 || period
>= AHC_ASYNC_XFER_PERIOD
)) {
3278 * We are narrow. Try falling back
3279 * to the next wide speed with
3280 * all supported ppr options set.
3282 targ
->dv_next_narrow_period
= period
+1;
3283 width
= MSG_EXT_WDTR_BUS_16_BIT
;
3284 period
= targ
->dv_next_wide_period
;
3285 ppr_options
= targ
->dv_max_ppr_options
;
3287 /* Only narrow fallback is allowed. */
3289 ppr_options
= targ
->dv_max_ppr_options
;
3292 ahc_unlock(ahc
, &s
);
3295 offset
= MAX_OFFSET
;
3296 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
,
3298 ahc_set_width(ahc
, devinfo
, width
, AHC_TRANS_GOAL
, FALSE
);
3303 if (width
== MSG_EXT_WDTR_BUS_8_BIT
)
3304 targ
->dv_next_narrow_period
= AHC_ASYNC_XFER_PERIOD
;
3306 targ
->dv_next_wide_period
= AHC_ASYNC_XFER_PERIOD
;
3308 ahc_set_syncrate(ahc
, devinfo
, syncrate
, period
, offset
,
3309 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
3310 targ
->dv_last_ppr_options
= ppr_options
;
3311 ahc_unlock(ahc
, &s
);
3316 ahc_linux_dv_timeout(struct scsi_cmnd
*cmd
)
3318 struct ahc_softc
*ahc
;
3322 ahc
= *((struct ahc_softc
**)cmd
->device
->host
->hostdata
);
3323 ahc_lock(ahc
, &flags
);
3326 if (ahc_debug
& AHC_SHOW_DV
) {
3327 printf("%s: Timeout while doing DV command %x.\n",
3328 ahc_name(ahc
), cmd
->cmnd
[0]);
3329 ahc_dump_card_state(ahc
);
3334 * Guard against "done race". No action is
3335 * required if we just completed.
3337 if ((scb
= (struct scb
*)cmd
->host_scribble
) == NULL
) {
3338 ahc_unlock(ahc
, &flags
);
3343 * Command has not completed. Mark this
3344 * SCB as having failing status prior to
3345 * resetting the bus, so we get the correct
3348 if ((scb
->flags
& SCB_SENSE
) != 0)
3349 ahc_set_transaction_status(scb
, CAM_AUTOSENSE_FAIL
);
3351 ahc_set_transaction_status(scb
, CAM_CMD_TIMEOUT
);
3352 ahc_reset_channel(ahc
, cmd
->device
->channel
+ 'A', /*initiate*/TRUE
);
3355 * Add a minimal bus settle delay for devices that are slow to
3356 * respond after bus resets.
3358 ahc_linux_freeze_simq(ahc
);
3359 init_timer(&ahc
->platform_data
->reset_timer
);
3360 ahc
->platform_data
->reset_timer
.data
= (u_long
)ahc
;
3361 ahc
->platform_data
->reset_timer
.expires
= jiffies
+ HZ
/ 2;
3362 ahc
->platform_data
->reset_timer
.function
=
3363 (ahc_linux_callback_t
*)ahc_linux_release_simq
;
3364 add_timer(&ahc
->platform_data
->reset_timer
);
3365 if (ahc_linux_next_device_to_run(ahc
) != NULL
)
3366 ahc_schedule_runq(ahc
);
3367 ahc_linux_run_complete_queue(ahc
);
3368 ahc_unlock(ahc
, &flags
);
3372 ahc_linux_dv_complete(struct scsi_cmnd
*cmd
)
3374 struct ahc_softc
*ahc
;
3376 ahc
= *((struct ahc_softc
**)cmd
->device
->host
->hostdata
);
3378 /* Delete the DV timer before it goes off! */
3379 scsi_delete_timer(cmd
);
3382 if (ahc_debug
& AHC_SHOW_DV
)
3383 printf("%s:%d:%d: Command completed, status= 0x%x\n",
3384 ahc_name(ahc
), cmd
->device
->channel
,
3385 cmd
->device
->id
, cmd
->result
);
3388 /* Wake up the state machine */
3389 up(&ahc
->platform_data
->dv_cmd_sem
);
3393 ahc_linux_generate_dv_pattern(struct ahc_linux_target
*targ
)
3399 if (targ
->dv_buffer
!= NULL
)
3400 free(targ
->dv_buffer
, M_DEVBUF
);
3401 targ
->dv_buffer
= malloc(targ
->dv_echo_size
, M_DEVBUF
, M_WAITOK
);
3402 if (targ
->dv_buffer1
!= NULL
)
3403 free(targ
->dv_buffer1
, M_DEVBUF
);
3404 targ
->dv_buffer1
= malloc(targ
->dv_echo_size
, M_DEVBUF
, M_WAITOK
);
3408 for (j
= 0 ; i
< targ
->dv_echo_size
; j
++) {
3411 * 32bytes of sequential numbers.
3413 targ
->dv_buffer
[i
++] = j
& 0xff;
3414 } else if (j
< 48) {
3416 * 32bytes of repeating 0x0000, 0xffff.
3418 targ
->dv_buffer
[i
++] = (j
& 0x02) ? 0xff : 0x00;
3419 } else if (j
< 64) {
3421 * 32bytes of repeating 0x5555, 0xaaaa.
3423 targ
->dv_buffer
[i
++] = (j
& 0x02) ? 0xaa : 0x55;
3426 * Remaining buffer is filled with a repeating
3430 * ~0x0001 << shifted once in each loop.
3434 targ
->dv_buffer
[i
++] = ~(b
>> 8) & 0xff;
3439 targ
->dv_buffer
[i
++] = (~b
& 0xff);
3442 targ
->dv_buffer
[i
++] = 0xff;
3449 ahc_linux_user_tagdepth(struct ahc_softc
*ahc
, struct ahc_devinfo
*devinfo
)
3451 static int warned_user
;
3455 if ((ahc
->user_discenable
& devinfo
->target_mask
) != 0) {
3456 if (ahc
->unit
>= NUM_ELEMENTS(aic7xxx_tag_info
)) {
3457 if (warned_user
== 0) {
3460 "aic7xxx: WARNING: Insufficient tag_info instances\n"
3461 "aic7xxx: for installed controllers. Using defaults\n"
3462 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
3463 "aic7xxx: the aic7xxx_osm..c source file.\n");
3466 tags
= AHC_MAX_QUEUE
;
3468 adapter_tag_info_t
*tag_info
;
3470 tag_info
= &aic7xxx_tag_info
[ahc
->unit
];
3471 tags
= tag_info
->tag_commands
[devinfo
->target_offset
];
3472 if (tags
> AHC_MAX_QUEUE
)
3473 tags
= AHC_MAX_QUEUE
;
3480 ahc_linux_user_dv_setting(struct ahc_softc
*ahc
)
3482 static int warned_user
;
3485 if (ahc
->unit
>= NUM_ELEMENTS(aic7xxx_dv_settings
)) {
3486 if (warned_user
== 0) {
3489 "aic7xxx: WARNING: Insufficient dv settings instances\n"
3490 "aic7xxx: for installed controllers. Using defaults\n"
3491 "aic7xxx: Please update the aic7xxx_dv_settings array\n"
3492 "aic7xxx: in the aic7xxx_osm.c source file.\n");
3498 dv
= aic7xxx_dv_settings
[ahc
->unit
];
3505 * Apply the default.
3508 * XXX - Enable DV on non-U160 controllers once it
3509 * has been tested there.
3512 dv
= (ahc
->features
& AHC_DT
);
3513 if (ahc
->seep_config
!= 0
3514 && ahc
->seep_config
->signature
>= CFSIGNATURE2
)
3515 dv
= (ahc
->seep_config
->adapter_control
& CFENABLEDV
);
3516 ahc_unlock(ahc
, &s
);
3522 * Determines the queue depth for a given device.
3525 ahc_linux_device_queue_depth(struct ahc_softc
*ahc
,
3526 struct ahc_linux_device
*dev
)
3528 struct ahc_devinfo devinfo
;
3531 ahc_compile_devinfo(&devinfo
,
3532 dev
->target
->channel
== 0
3533 ? ahc
->our_id
: ahc
->our_id_b
,
3534 dev
->target
->target
, dev
->lun
,
3535 dev
->target
->channel
== 0 ? 'A' : 'B',
3537 tags
= ahc_linux_user_tagdepth(ahc
, &devinfo
);
3539 && dev
->scsi_device
!= NULL
3540 && dev
->scsi_device
->tagged_supported
!= 0) {
3542 ahc_set_tags(ahc
, &devinfo
, AHC_QUEUE_TAGGED
);
3543 ahc_print_devinfo(ahc
, &devinfo
);
3544 printf("Tagged Queuing enabled. Depth %d\n", tags
);
3546 ahc_set_tags(ahc
, &devinfo
, AHC_QUEUE_NONE
);
3551 ahc_linux_run_device_queue(struct ahc_softc
*ahc
, struct ahc_linux_device
*dev
)
3553 struct ahc_cmd
*acmd
;
3554 struct scsi_cmnd
*cmd
;
3556 struct hardware_scb
*hscb
;
3557 struct ahc_initiator_tinfo
*tinfo
;
3558 struct ahc_tmode_tstate
*tstate
;
3561 if ((dev
->flags
& AHC_DEV_ON_RUN_LIST
) != 0)
3562 panic("running device on run list");
3564 while ((acmd
= TAILQ_FIRST(&dev
->busyq
)) != NULL
3565 && dev
->openings
> 0 && dev
->qfrozen
== 0) {
3568 * Schedule us to run later. The only reason we are not
3569 * running is because the whole controller Q is frozen.
3571 if (ahc
->platform_data
->qfrozen
!= 0
3572 && AHC_DV_SIMQ_FROZEN(ahc
) == 0) {
3573 TAILQ_INSERT_TAIL(&ahc
->platform_data
->device_runq
,
3575 dev
->flags
|= AHC_DEV_ON_RUN_LIST
;
3579 * Get an scb to use.
3581 if ((scb
= ahc_get_scb(ahc
)) == NULL
) {
3582 TAILQ_INSERT_TAIL(&ahc
->platform_data
->device_runq
,
3584 dev
->flags
|= AHC_DEV_ON_RUN_LIST
;
3585 ahc
->flags
|= AHC_RESOURCE_SHORTAGE
;
3588 TAILQ_REMOVE(&dev
->busyq
, acmd
, acmd_links
.tqe
);
3589 cmd
= &acmd_scsi_cmd(acmd
);
3591 scb
->platform_data
->dev
= dev
;
3593 cmd
->host_scribble
= (char *)scb
;
3596 * Fill out basics of the HSCB.
3599 hscb
->scsiid
= BUILD_SCSIID(ahc
, cmd
);
3600 hscb
->lun
= cmd
->device
->lun
;
3601 mask
= SCB_GET_TARGET_MASK(ahc
, scb
);
3602 tinfo
= ahc_fetch_transinfo(ahc
, SCB_GET_CHANNEL(ahc
, scb
),
3603 SCB_GET_OUR_ID(scb
),
3604 SCB_GET_TARGET(ahc
, scb
), &tstate
);
3605 hscb
->scsirate
= tinfo
->scsirate
;
3606 hscb
->scsioffset
= tinfo
->curr
.offset
;
3607 if ((tstate
->ultraenb
& mask
) != 0)
3608 hscb
->control
|= ULTRAENB
;
3610 if ((ahc
->user_discenable
& mask
) != 0)
3611 hscb
->control
|= DISCENB
;
3613 if (AHC_DV_CMD(cmd
) != 0)
3614 scb
->flags
|= SCB_SILENT
;
3616 if ((tstate
->auto_negotiate
& mask
) != 0) {
3617 scb
->flags
|= SCB_AUTO_NEGOTIATE
;
3618 scb
->hscb
->control
|= MK_MESSAGE
;
3621 if ((dev
->flags
& (AHC_DEV_Q_TAGGED
|AHC_DEV_Q_BASIC
)) != 0) {
3622 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
3624 uint8_t tag_msgs
[2];
3626 msg_bytes
= scsi_populate_tag_msg(cmd
, tag_msgs
);
3627 if (msg_bytes
&& tag_msgs
[0] != MSG_SIMPLE_TASK
) {
3628 hscb
->control
|= tag_msgs
[0];
3629 if (tag_msgs
[0] == MSG_ORDERED_TASK
)
3630 dev
->commands_since_idle_or_otag
= 0;
3633 if (dev
->commands_since_idle_or_otag
== AHC_OTAG_THRESH
3634 && (dev
->flags
& AHC_DEV_Q_TAGGED
) != 0) {
3635 hscb
->control
|= MSG_ORDERED_TASK
;
3636 dev
->commands_since_idle_or_otag
= 0;
3638 hscb
->control
|= MSG_SIMPLE_TASK
;
3642 hscb
->cdb_len
= cmd
->cmd_len
;
3643 if (hscb
->cdb_len
<= 12) {
3644 memcpy(hscb
->shared_data
.cdb
, cmd
->cmnd
, hscb
->cdb_len
);
3646 memcpy(hscb
->cdb32
, cmd
->cmnd
, hscb
->cdb_len
);
3647 scb
->flags
|= SCB_CDB32_PTR
;
3650 scb
->platform_data
->xfer_len
= 0;
3651 ahc_set_residual(scb
, 0);
3652 ahc_set_sense_residual(scb
, 0);
3654 if (cmd
->use_sg
!= 0) {
3655 struct ahc_dma_seg
*sg
;
3656 struct scatterlist
*cur_seg
;
3657 struct scatterlist
*end_seg
;
3660 cur_seg
= (struct scatterlist
*)cmd
->request_buffer
;
3661 nseg
= pci_map_sg(ahc
->dev_softc
, cur_seg
, cmd
->use_sg
,
3662 scsi_to_pci_dma_dir(cmd
->sc_data_direction
));
3663 end_seg
= cur_seg
+ nseg
;
3664 /* Copy the segments into the SG list. */
3667 * The sg_count may be larger than nseg if
3668 * a transfer crosses a 32bit page.
3670 while (cur_seg
< end_seg
) {
3675 addr
= sg_dma_address(cur_seg
);
3676 len
= sg_dma_len(cur_seg
);
3677 consumed
= ahc_linux_map_seg(ahc
, scb
,
3680 scb
->sg_count
+= consumed
;
3684 sg
->len
|= ahc_htole32(AHC_DMA_LAST_SEG
);
3687 * Reset the sg list pointer.
3690 ahc_htole32(scb
->sg_list_phys
| SG_FULL_RESID
);
3693 * Copy the first SG into the "current"
3694 * data pointer area.
3696 scb
->hscb
->dataptr
= scb
->sg_list
->addr
;
3697 scb
->hscb
->datacnt
= scb
->sg_list
->len
;
3698 } else if (cmd
->request_bufflen
!= 0) {
3699 struct ahc_dma_seg
*sg
;
3703 addr
= pci_map_single(ahc
->dev_softc
,
3704 cmd
->request_buffer
,
3705 cmd
->request_bufflen
,
3706 scsi_to_pci_dma_dir(cmd
->sc_data_direction
));
3707 scb
->platform_data
->buf_busaddr
= addr
;
3708 scb
->sg_count
= ahc_linux_map_seg(ahc
, scb
,
3710 cmd
->request_bufflen
);
3711 sg
->len
|= ahc_htole32(AHC_DMA_LAST_SEG
);
3714 * Reset the sg list pointer.
3717 ahc_htole32(scb
->sg_list_phys
| SG_FULL_RESID
);
3720 * Copy the first SG into the "current"
3721 * data pointer area.
3723 scb
->hscb
->dataptr
= sg
->addr
;
3724 scb
->hscb
->datacnt
= sg
->len
;
3726 scb
->hscb
->sgptr
= ahc_htole32(SG_LIST_NULL
);
3727 scb
->hscb
->dataptr
= 0;
3728 scb
->hscb
->datacnt
= 0;
3732 ahc_sync_sglist(ahc
, scb
, BUS_DMASYNC_PREWRITE
);
3733 LIST_INSERT_HEAD(&ahc
->pending_scbs
, scb
, pending_links
);
3736 dev
->commands_issued
++;
3737 if ((dev
->flags
& AHC_DEV_PERIODIC_OTAG
) != 0)
3738 dev
->commands_since_idle_or_otag
++;
3741 * We only allow one untagged transaction
3742 * per target in the initiator role unless
3743 * we are storing a full busy target *lun*
3744 * table in SCB space.
3746 if ((scb
->hscb
->control
& (TARGET_SCB
|TAG_ENB
)) == 0
3747 && (ahc
->features
& AHC_SCB_BTT
) == 0) {
3748 struct scb_tailq
*untagged_q
;
3751 target_offset
= SCB_GET_TARGET_OFFSET(ahc
, scb
);
3752 untagged_q
= &(ahc
->untagged_queues
[target_offset
]);
3753 TAILQ_INSERT_TAIL(untagged_q
, scb
, links
.tqe
);
3754 scb
->flags
|= SCB_UNTAGGEDQ
;
3755 if (TAILQ_FIRST(untagged_q
) != scb
)
3758 scb
->flags
|= SCB_ACTIVE
;
3759 ahc_queue_scb(ahc
, scb
);
3764 * SCSI controller interrupt handler.
3767 ahc_linux_isr(int irq
, void *dev_id
, struct pt_regs
* regs
)
3769 struct ahc_softc
*ahc
;
3773 ahc
= (struct ahc_softc
*) dev_id
;
3774 ahc_lock(ahc
, &flags
);
3775 ours
= ahc_intr(ahc
);
3776 if (ahc_linux_next_device_to_run(ahc
) != NULL
)
3777 ahc_schedule_runq(ahc
);
3778 ahc_linux_run_complete_queue(ahc
);
3779 ahc_unlock(ahc
, &flags
);
3780 return IRQ_RETVAL(ours
);
3784 ahc_platform_flushwork(struct ahc_softc
*ahc
)
3787 while (ahc_linux_run_complete_queue(ahc
) != NULL
)
3791 static struct ahc_linux_target
*
3792 ahc_linux_alloc_target(struct ahc_softc
*ahc
, u_int channel
, u_int target
)
3794 struct ahc_linux_target
*targ
;
3795 u_int target_offset
;
3797 target_offset
= target
;
3801 targ
= malloc(sizeof(*targ
), M_DEVBUG
, M_NOWAIT
);
3804 memset(targ
, 0, sizeof(*targ
));
3805 targ
->channel
= channel
;
3806 targ
->target
= target
;
3808 targ
->flags
= AHC_DV_REQUIRED
;
3809 ahc
->platform_data
->targets
[target_offset
] = targ
;
3814 ahc_linux_free_target(struct ahc_softc
*ahc
, struct ahc_linux_target
*targ
)
3816 struct ahc_devinfo devinfo
;
3817 struct ahc_initiator_tinfo
*tinfo
;
3818 struct ahc_tmode_tstate
*tstate
;
3820 u_int target_offset
;
3824 * Force a negotiation to async/narrow on any
3825 * future command to this device unless a bus
3826 * reset occurs between now and that command.
3828 channel
= 'A' + targ
->channel
;
3829 our_id
= ahc
->our_id
;
3830 target_offset
= targ
->target
;
3831 if (targ
->channel
!= 0) {
3833 our_id
= ahc
->our_id_b
;
3835 tinfo
= ahc_fetch_transinfo(ahc
, channel
, our_id
,
3836 targ
->target
, &tstate
);
3837 ahc_compile_devinfo(&devinfo
, our_id
, targ
->target
, CAM_LUN_WILDCARD
,
3838 channel
, ROLE_INITIATOR
);
3839 ahc_set_syncrate(ahc
, &devinfo
, NULL
, 0, 0, 0,
3840 AHC_TRANS_GOAL
, /*paused*/FALSE
);
3841 ahc_set_width(ahc
, &devinfo
, MSG_EXT_WDTR_BUS_8_BIT
,
3842 AHC_TRANS_GOAL
, /*paused*/FALSE
);
3843 ahc_update_neg_request(ahc
, &devinfo
, tstate
, tinfo
, AHC_NEG_ALWAYS
);
3844 ahc
->platform_data
->targets
[target_offset
] = NULL
;
3845 if (targ
->inq_data
!= NULL
)
3846 free(targ
->inq_data
, M_DEVBUF
);
3847 if (targ
->dv_buffer
!= NULL
)
3848 free(targ
->dv_buffer
, M_DEVBUF
);
3849 if (targ
->dv_buffer1
!= NULL
)
3850 free(targ
->dv_buffer1
, M_DEVBUF
);
3851 free(targ
, M_DEVBUF
);
3854 static struct ahc_linux_device
*
3855 ahc_linux_alloc_device(struct ahc_softc
*ahc
,
3856 struct ahc_linux_target
*targ
, u_int lun
)
3858 struct ahc_linux_device
*dev
;
3860 dev
= malloc(sizeof(*dev
), M_DEVBUG
, M_NOWAIT
);
3863 memset(dev
, 0, sizeof(*dev
));
3864 init_timer(&dev
->timer
);
3865 TAILQ_INIT(&dev
->busyq
);
3866 dev
->flags
= AHC_DEV_UNCONFIGURED
;
3871 * We start out life using untagged
3872 * transactions of which we allow one.
3877 * Set maxtags to 0. This will be changed if we
3878 * later determine that we are dealing with
3879 * a tagged queuing capable device.
3884 targ
->devices
[lun
] = dev
;
3889 __ahc_linux_free_device(struct ahc_softc
*ahc
, struct ahc_linux_device
*dev
)
3891 struct ahc_linux_target
*targ
;
3894 targ
->devices
[dev
->lun
] = NULL
;
3895 free(dev
, M_DEVBUF
);
3897 if (targ
->refcount
== 0
3898 && (targ
->flags
& AHC_DV_REQUIRED
) == 0)
3899 ahc_linux_free_target(ahc
, targ
);
3903 ahc_linux_free_device(struct ahc_softc
*ahc
, struct ahc_linux_device
*dev
)
3905 del_timer_sync(&dev
->timer
);
3906 __ahc_linux_free_device(ahc
, dev
);
3910 ahc_send_async(struct ahc_softc
*ahc
, char channel
,
3911 u_int target
, u_int lun
, ac_code code
, void *arg
)
3914 case AC_TRANSFER_NEG
:
3917 struct ahc_linux_target
*targ
;
3918 struct info_str info
;
3919 struct ahc_initiator_tinfo
*tinfo
;
3920 struct ahc_tmode_tstate
*tstate
;
3924 info
.length
= sizeof(buf
);
3927 tinfo
= ahc_fetch_transinfo(ahc
, channel
,
3928 channel
== 'A' ? ahc
->our_id
3933 * Don't bother reporting results while
3934 * negotiations are still pending.
3936 if (tinfo
->curr
.period
!= tinfo
->goal
.period
3937 || tinfo
->curr
.width
!= tinfo
->goal
.width
3938 || tinfo
->curr
.offset
!= tinfo
->goal
.offset
3939 || tinfo
->curr
.ppr_options
!= tinfo
->goal
.ppr_options
)
3940 if (bootverbose
== 0)
3944 * Don't bother reporting results that
3945 * are identical to those last reported.
3947 target_offset
= target
;
3950 targ
= ahc
->platform_data
->targets
[target_offset
];
3953 if (tinfo
->curr
.period
== targ
->last_tinfo
.period
3954 && tinfo
->curr
.width
== targ
->last_tinfo
.width
3955 && tinfo
->curr
.offset
== targ
->last_tinfo
.offset
3956 && tinfo
->curr
.ppr_options
== targ
->last_tinfo
.ppr_options
)
3957 if (bootverbose
== 0)
3960 targ
->last_tinfo
.period
= tinfo
->curr
.period
;
3961 targ
->last_tinfo
.width
= tinfo
->curr
.width
;
3962 targ
->last_tinfo
.offset
= tinfo
->curr
.offset
;
3963 targ
->last_tinfo
.ppr_options
= tinfo
->curr
.ppr_options
;
3965 printf("(%s:%c:", ahc_name(ahc
), channel
);
3966 if (target
== CAM_TARGET_WILDCARD
)
3969 printf("%d): ", target
);
3970 ahc_format_transinfo(&info
, &tinfo
->curr
);
3971 if (info
.pos
< info
.length
)
3972 *info
.buffer
= '\0';
3974 buf
[info
.length
- 1] = '\0';
3980 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
3981 WARN_ON(lun
!= CAM_LUN_WILDCARD
);
3982 scsi_report_device_reset(ahc
->platform_data
->host
,
3983 channel
- 'A', target
);
3985 Scsi_Device
*scsi_dev
;
3988 * Find the SCSI device associated with this
3989 * request and indicate that a UA is expected.
3991 for (scsi_dev
= ahc
->platform_data
->host
->host_queue
;
3992 scsi_dev
!= NULL
; scsi_dev
= scsi_dev
->next
) {
3993 if (channel
- 'A' == scsi_dev
->channel
3994 && target
== scsi_dev
->id
3995 && (lun
== CAM_LUN_WILDCARD
3996 || lun
== scsi_dev
->lun
)) {
3997 scsi_dev
->was_reset
= 1;
3998 scsi_dev
->expecting_cc_ua
= 1;
4005 if (ahc
->platform_data
->host
!= NULL
) {
4006 scsi_report_bus_reset(ahc
->platform_data
->host
,
4011 panic("ahc_send_async: Unexpected async event");
4016 * Calls the higher level scsi done function and frees the scb.
4019 ahc_done(struct ahc_softc
*ahc
, struct scb
*scb
)
4022 struct ahc_linux_device
*dev
;
4024 LIST_REMOVE(scb
, pending_links
);
4025 if ((scb
->flags
& SCB_UNTAGGEDQ
) != 0) {
4026 struct scb_tailq
*untagged_q
;
4029 target_offset
= SCB_GET_TARGET_OFFSET(ahc
, scb
);
4030 untagged_q
= &(ahc
->untagged_queues
[target_offset
]);
4031 TAILQ_REMOVE(untagged_q
, scb
, links
.tqe
);
4032 ahc_run_untagged_queue(ahc
, untagged_q
);
4035 if ((scb
->flags
& SCB_ACTIVE
) == 0) {
4036 printf("SCB %d done'd twice\n", scb
->hscb
->tag
);
4037 ahc_dump_card_state(ahc
);
4038 panic("Stopping for safety");
4041 dev
= scb
->platform_data
->dev
;
4044 if ((cmd
->result
& (CAM_DEV_QFRZN
<< 16)) != 0) {
4045 cmd
->result
&= ~(CAM_DEV_QFRZN
<< 16);
4048 ahc_linux_unmap_scb(ahc
, scb
);
4051 * Guard against stale sense data.
4052 * The Linux mid-layer assumes that sense
4053 * was retrieved anytime the first byte of
4054 * the sense buffer looks "sane".
4056 cmd
->sense_buffer
[0] = 0;
4057 if (ahc_get_transaction_status(scb
) == CAM_REQ_INPROG
) {
4058 uint32_t amount_xferred
;
4061 ahc_get_transfer_length(scb
) - ahc_get_residual(scb
);
4062 if ((scb
->flags
& SCB_TRANSMISSION_ERROR
) != 0) {
4064 if ((ahc_debug
& AHC_SHOW_MISC
) != 0) {
4065 ahc_print_path(ahc
, scb
);
4066 printf("Set CAM_UNCOR_PARITY\n");
4069 ahc_set_transaction_status(scb
, CAM_UNCOR_PARITY
);
4070 #ifdef AHC_REPORT_UNDERFLOWS
4072 * This code is disabled by default as some
4073 * clients of the SCSI system do not properly
4074 * initialize the underflow parameter. This
4075 * results in spurious termination of commands
4076 * that complete as expected (e.g. underflow is
4077 * allowed as command can return variable amounts
4080 } else if (amount_xferred
< scb
->io_ctx
->underflow
) {
4083 ahc_print_path(ahc
, scb
);
4085 for (i
= 0; i
< scb
->io_ctx
->cmd_len
; i
++)
4086 printf(" 0x%x", scb
->io_ctx
->cmnd
[i
]);
4088 ahc_print_path(ahc
, scb
);
4089 printf("Saw underflow (%ld of %ld bytes). "
4090 "Treated as error\n",
4091 ahc_get_residual(scb
),
4092 ahc_get_transfer_length(scb
));
4093 ahc_set_transaction_status(scb
, CAM_DATA_RUN_ERR
);
4096 ahc_set_transaction_status(scb
, CAM_REQ_CMP
);
4098 } else if (ahc_get_transaction_status(scb
) == CAM_SCSI_STATUS_ERROR
) {
4099 ahc_linux_handle_scsi_status(ahc
, dev
, scb
);
4100 } else if (ahc_get_transaction_status(scb
) == CAM_SEL_TIMEOUT
) {
4101 dev
->flags
|= AHC_DEV_UNCONFIGURED
;
4102 if (AHC_DV_CMD(cmd
) == FALSE
)
4103 dev
->target
->flags
&= ~AHC_DV_REQUIRED
;
4106 * Start DV for devices that require it assuming the first command
4107 * sent does not result in a selection timeout.
4109 if (ahc_get_transaction_status(scb
) != CAM_SEL_TIMEOUT
4110 && (dev
->target
->flags
& AHC_DV_REQUIRED
) != 0)
4111 ahc_linux_start_dv(ahc
);
4113 if (dev
->openings
== 1
4114 && ahc_get_transaction_status(scb
) == CAM_REQ_CMP
4115 && ahc_get_scsi_status(scb
) != SCSI_STATUS_QUEUE_FULL
)
4116 dev
->tag_success_count
++;
4118 * Some devices deal with temporary internal resource
4119 * shortages by returning queue full. When the queue
4120 * full occurrs, we throttle back. Slowly try to get
4121 * back to our previous queue depth.
4123 if ((dev
->openings
+ dev
->active
) < dev
->maxtags
4124 && dev
->tag_success_count
> AHC_TAG_SUCCESS_INTERVAL
) {
4125 dev
->tag_success_count
= 0;
4129 if (dev
->active
== 0)
4130 dev
->commands_since_idle_or_otag
= 0;
4132 if (TAILQ_EMPTY(&dev
->busyq
)) {
4133 if ((dev
->flags
& AHC_DEV_UNCONFIGURED
) != 0
4135 && (dev
->flags
& AHC_DEV_TIMER_ACTIVE
) == 0)
4136 ahc_linux_free_device(ahc
, dev
);
4137 } else if ((dev
->flags
& AHC_DEV_ON_RUN_LIST
) == 0) {
4138 TAILQ_INSERT_TAIL(&ahc
->platform_data
->device_runq
, dev
, links
);
4139 dev
->flags
|= AHC_DEV_ON_RUN_LIST
;
4142 if ((scb
->flags
& SCB_RECOVERY_SCB
) != 0) {
4143 printf("Recovery SCB completes\n");
4144 if (ahc_get_transaction_status(scb
) == CAM_BDR_SENT
4145 || ahc_get_transaction_status(scb
) == CAM_REQ_ABORTED
)
4146 ahc_set_transaction_status(scb
, CAM_CMD_TIMEOUT
);
4147 if ((ahc
->platform_data
->flags
& AHC_UP_EH_SEMAPHORE
) != 0) {
4148 ahc
->platform_data
->flags
&= ~AHC_UP_EH_SEMAPHORE
;
4149 up(&ahc
->platform_data
->eh_sem
);
4153 ahc_free_scb(ahc
, scb
);
4154 ahc_linux_queue_cmd_complete(ahc
, cmd
);
4156 if ((ahc
->platform_data
->flags
& AHC_DV_WAIT_SIMQ_EMPTY
) != 0
4157 && LIST_FIRST(&ahc
->pending_scbs
) == NULL
) {
4158 ahc
->platform_data
->flags
&= ~AHC_DV_WAIT_SIMQ_EMPTY
;
4159 up(&ahc
->platform_data
->dv_sem
);
4165 ahc_linux_handle_scsi_status(struct ahc_softc
*ahc
,
4166 struct ahc_linux_device
*dev
, struct scb
*scb
)
4168 struct ahc_devinfo devinfo
;
4170 ahc_compile_devinfo(&devinfo
,
4172 dev
->target
->target
, dev
->lun
,
4173 dev
->target
->channel
== 0 ? 'A' : 'B',
4177 * We don't currently trust the mid-layer to
4178 * properly deal with queue full or busy. So,
4179 * when one occurs, we tell the mid-layer to
4180 * unconditionally requeue the command to us
4181 * so that we can retry it ourselves. We also
4182 * implement our own throttling mechanism so
4183 * we don't clobber the device with too many
4186 switch (ahc_get_scsi_status(scb
)) {
4189 case SCSI_STATUS_CHECK_COND
:
4190 case SCSI_STATUS_CMD_TERMINATED
:
4195 * Copy sense information to the OS's cmd
4196 * structure if it is available.
4199 if (scb
->flags
& SCB_SENSE
) {
4202 sense_size
= MIN(sizeof(struct scsi_sense_data
)
4203 - ahc_get_sense_residual(scb
),
4204 sizeof(cmd
->sense_buffer
));
4205 memcpy(cmd
->sense_buffer
,
4206 ahc_get_sense_buf(ahc
, scb
), sense_size
);
4207 if (sense_size
< sizeof(cmd
->sense_buffer
))
4208 memset(&cmd
->sense_buffer
[sense_size
], 0,
4209 sizeof(cmd
->sense_buffer
) - sense_size
);
4210 cmd
->result
|= (DRIVER_SENSE
<< 24);
4212 if (ahc_debug
& AHC_SHOW_SENSE
) {
4215 printf("Copied %d bytes of sense data:",
4217 for (i
= 0; i
< sense_size
; i
++) {
4220 printf("0x%x ", cmd
->sense_buffer
[i
]);
4228 case SCSI_STATUS_QUEUE_FULL
:
4231 * By the time the core driver has returned this
4232 * command, all other commands that were queued
4233 * to us but not the device have been returned.
4234 * This ensures that dev->active is equal to
4235 * the number of commands actually queued to
4238 dev
->tag_success_count
= 0;
4239 if (dev
->active
!= 0) {
4241 * Drop our opening count to the number
4242 * of commands currently outstanding.
4246 ahc_print_path(ahc, scb);
4247 printf("Dropping tag count to %d\n", dev->active);
4249 if (dev
->active
== dev
->tags_on_last_queuefull
) {
4251 dev
->last_queuefull_same_count
++;
4253 * If we repeatedly see a queue full
4254 * at the same queue depth, this
4255 * device has a fixed number of tag
4256 * slots. Lock in this tag depth
4257 * so we stop seeing queue fulls from
4260 if (dev
->last_queuefull_same_count
4261 == AHC_LOCK_TAGS_COUNT
) {
4262 dev
->maxtags
= dev
->active
;
4263 ahc_print_path(ahc
, scb
);
4264 printf("Locking max tag count at %d\n",
4268 dev
->tags_on_last_queuefull
= dev
->active
;
4269 dev
->last_queuefull_same_count
= 0;
4271 ahc_set_transaction_status(scb
, CAM_REQUEUE_REQ
);
4272 ahc_set_scsi_status(scb
, SCSI_STATUS_OK
);
4273 ahc_platform_set_tags(ahc
, &devinfo
,
4274 (dev
->flags
& AHC_DEV_Q_BASIC
)
4275 ? AHC_QUEUE_BASIC
: AHC_QUEUE_TAGGED
);
4279 * Drop down to a single opening, and treat this
4280 * as if the target returned BUSY SCSI status.
4283 ahc_set_scsi_status(scb
, SCSI_STATUS_BUSY
);
4284 ahc_platform_set_tags(ahc
, &devinfo
,
4285 (dev
->flags
& AHC_DEV_Q_BASIC
)
4286 ? AHC_QUEUE_BASIC
: AHC_QUEUE_TAGGED
);
4289 case SCSI_STATUS_BUSY
:
4292 * Set a short timer to defer sending commands for
4293 * a bit since Linux will not delay in this case.
4295 if ((dev
->flags
& AHC_DEV_TIMER_ACTIVE
) != 0) {
4296 printf("%s:%c:%d: Device Timer still active during "
4297 "busy processing\n", ahc_name(ahc
),
4298 dev
->target
->channel
, dev
->target
->target
);
4301 dev
->flags
|= AHC_DEV_TIMER_ACTIVE
;
4303 init_timer(&dev
->timer
);
4304 dev
->timer
.data
= (u_long
)dev
;
4305 dev
->timer
.expires
= jiffies
+ (HZ
/2);
4306 dev
->timer
.function
= ahc_linux_dev_timed_unfreeze
;
4307 add_timer(&dev
->timer
);
4314 ahc_linux_queue_cmd_complete(struct ahc_softc
*ahc
, Scsi_Cmnd
*cmd
)
4317 * Typically, the complete queue has very few entries
4318 * queued to it before the queue is emptied by
4319 * ahc_linux_run_complete_queue, so sorting the entries
4320 * by generation number should be inexpensive.
4321 * We perform the sort so that commands that complete
4322 * with an error are retuned in the order origionally
4323 * queued to the controller so that any subsequent retries
4324 * are performed in order. The underlying ahc routines do
4325 * not guarantee the order that aborted commands will be
4328 struct ahc_completeq
*completeq
;
4329 struct ahc_cmd
*list_cmd
;
4330 struct ahc_cmd
*acmd
;
4333 * Map CAM error codes into Linux Error codes. We
4334 * avoid the conversion so that the DV code has the
4335 * full error information available when making
4336 * state change decisions.
4338 if (AHC_DV_CMD(cmd
) == FALSE
) {
4341 switch (ahc_cmd_get_transaction_status(cmd
)) {
4342 case CAM_REQ_INPROG
:
4344 case CAM_SCSI_STATUS_ERROR
:
4345 new_status
= DID_OK
;
4347 case CAM_REQ_ABORTED
:
4348 new_status
= DID_ABORT
;
4351 new_status
= DID_BUS_BUSY
;
4353 case CAM_REQ_INVALID
:
4354 case CAM_PATH_INVALID
:
4355 new_status
= DID_BAD_TARGET
;
4357 case CAM_SEL_TIMEOUT
:
4358 new_status
= DID_NO_CONNECT
;
4360 case CAM_SCSI_BUS_RESET
:
4362 new_status
= DID_RESET
;
4364 case CAM_UNCOR_PARITY
:
4365 new_status
= DID_PARITY
;
4367 case CAM_CMD_TIMEOUT
:
4368 new_status
= DID_TIME_OUT
;
4371 case CAM_REQ_CMP_ERR
:
4372 case CAM_AUTOSENSE_FAIL
:
4374 case CAM_DATA_RUN_ERR
:
4375 case CAM_UNEXP_BUSFREE
:
4376 case CAM_SEQUENCE_FAIL
:
4377 case CAM_CCB_LEN_ERR
:
4378 case CAM_PROVIDE_FAIL
:
4379 case CAM_REQ_TERMIO
:
4380 case CAM_UNREC_HBA_ERROR
:
4381 case CAM_REQ_TOO_BIG
:
4382 new_status
= DID_ERROR
;
4384 case CAM_REQUEUE_REQ
:
4386 * If we want the request requeued, make sure there
4387 * are sufficent retries. In the old scsi error code,
4388 * we used to be able to specify a result code that
4389 * bypassed the retry count. Now we must use this
4390 * hack. We also "fake" a check condition with
4391 * a sense code of ABORTED COMMAND. This seems to
4392 * evoke a retry even if this command is being sent
4393 * via the eh thread. Ick! Ick! Ick!
4395 if (cmd
->retries
> 0)
4397 new_status
= DID_OK
;
4398 ahc_cmd_set_scsi_status(cmd
, SCSI_STATUS_CHECK_COND
);
4399 cmd
->result
|= (DRIVER_SENSE
<< 24);
4400 memset(cmd
->sense_buffer
, 0,
4401 sizeof(cmd
->sense_buffer
));
4402 cmd
->sense_buffer
[0] = SSD_ERRCODE_VALID
4403 | SSD_CURRENT_ERROR
;
4404 cmd
->sense_buffer
[2] = SSD_KEY_ABORTED_COMMAND
;
4407 /* We should never get here */
4408 new_status
= DID_ERROR
;
4412 ahc_cmd_set_transaction_status(cmd
, new_status
);
4415 completeq
= &ahc
->platform_data
->completeq
;
4416 list_cmd
= TAILQ_FIRST(completeq
);
4417 acmd
= (struct ahc_cmd
*)cmd
;
4418 while (list_cmd
!= NULL
4419 && acmd_scsi_cmd(list_cmd
).serial_number
4420 < acmd_scsi_cmd(acmd
).serial_number
)
4421 list_cmd
= TAILQ_NEXT(list_cmd
, acmd_links
.tqe
);
4422 if (list_cmd
!= NULL
)
4423 TAILQ_INSERT_BEFORE(list_cmd
, acmd
, acmd_links
.tqe
);
4425 TAILQ_INSERT_TAIL(completeq
, acmd
, acmd_links
.tqe
);
4429 ahc_linux_filter_inquiry(struct ahc_softc
*ahc
, struct ahc_devinfo
*devinfo
)
4431 struct scsi_inquiry_data
*sid
;
4432 struct ahc_initiator_tinfo
*tinfo
;
4433 struct ahc_transinfo
*user
;
4434 struct ahc_transinfo
*goal
;
4435 struct ahc_transinfo
*curr
;
4436 struct ahc_tmode_tstate
*tstate
;
4437 struct ahc_syncrate
*syncrate
;
4438 struct ahc_linux_device
*dev
;
4444 u_int trans_version
;
4448 * Determine if this lun actually exists. If so,
4449 * hold on to its corresponding device structure.
4450 * If not, make sure we release the device and
4451 * don't bother processing the rest of this inquiry
4454 dev
= ahc_linux_get_device(ahc
, devinfo
->channel
- 'A',
4455 devinfo
->target
, devinfo
->lun
,
4458 sid
= (struct scsi_inquiry_data
*)dev
->target
->inq_data
;
4459 if (SID_QUAL(sid
) == SID_QUAL_LU_CONNECTED
) {
4461 dev
->flags
&= ~AHC_DEV_UNCONFIGURED
;
4463 dev
->flags
|= AHC_DEV_UNCONFIGURED
;
4468 * Update our notion of this device's transfer
4469 * negotiation capabilities.
4471 tinfo
= ahc_fetch_transinfo(ahc
, devinfo
->channel
,
4472 devinfo
->our_scsiid
,
4473 devinfo
->target
, &tstate
);
4474 user
= &tinfo
->user
;
4475 goal
= &tinfo
->goal
;
4476 curr
= &tinfo
->curr
;
4477 width
= user
->width
;
4478 period
= user
->period
;
4479 offset
= user
->offset
;
4480 ppr_options
= user
->ppr_options
;
4481 trans_version
= user
->transport_version
;
4482 prot_version
= MIN(user
->protocol_version
, SID_ANSI_REV(sid
));
4485 * Only attempt SPI3/4 once we've verified that
4486 * the device claims to support SPI3/4 features.
4488 if (prot_version
< SCSI_REV_2
)
4489 trans_version
= SID_ANSI_REV(sid
);
4491 trans_version
= SCSI_REV_2
;
4493 if ((sid
->flags
& SID_WBus16
) == 0)
4494 width
= MSG_EXT_WDTR_BUS_8_BIT
;
4495 if ((sid
->flags
& SID_Sync
) == 0) {
4500 if ((sid
->spi3data
& SID_SPI_QAS
) == 0)
4501 ppr_options
&= ~MSG_EXT_PPR_QAS_REQ
;
4502 if ((sid
->spi3data
& SID_SPI_CLOCK_DT
) == 0)
4503 ppr_options
&= MSG_EXT_PPR_QAS_REQ
;
4504 if ((sid
->spi3data
& SID_SPI_IUS
) == 0)
4505 ppr_options
&= (MSG_EXT_PPR_DT_REQ
4506 | MSG_EXT_PPR_QAS_REQ
);
4508 if (prot_version
> SCSI_REV_2
4509 && ppr_options
!= 0)
4510 trans_version
= user
->transport_version
;
4512 ahc_validate_width(ahc
, /*tinfo limit*/NULL
, &width
, ROLE_UNKNOWN
);
4513 if ((ahc
->features
& AHC_ULTRA2
) != 0)
4514 maxsync
= AHC_SYNCRATE_DT
;
4515 else if ((ahc
->features
& AHC_ULTRA
) != 0)
4516 maxsync
= AHC_SYNCRATE_ULTRA
;
4518 maxsync
= AHC_SYNCRATE_FAST
;
4520 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, maxsync
);
4521 ahc_validate_offset(ahc
, /*tinfo limit*/NULL
, syncrate
,
4522 &offset
, width
, ROLE_UNKNOWN
);
4523 if (offset
== 0 || period
== 0) {
4528 /* Apply our filtered user settings. */
4529 curr
->transport_version
= trans_version
;
4530 curr
->protocol_version
= prot_version
;
4531 ahc_set_width(ahc
, devinfo
, width
, AHC_TRANS_GOAL
, /*paused*/FALSE
);
4532 ahc_set_syncrate(ahc
, devinfo
, syncrate
, period
,
4533 offset
, ppr_options
, AHC_TRANS_GOAL
,
4538 ahc_linux_sem_timeout(u_long arg
)
4540 struct ahc_softc
*ahc
;
4543 ahc
= (struct ahc_softc
*)arg
;
4546 if ((ahc
->platform_data
->flags
& AHC_UP_EH_SEMAPHORE
) != 0) {
4547 ahc
->platform_data
->flags
&= ~AHC_UP_EH_SEMAPHORE
;
4548 up(&ahc
->platform_data
->eh_sem
);
4550 ahc_unlock(ahc
, &s
);
4554 ahc_linux_freeze_simq(struct ahc_softc
*ahc
)
4556 ahc
->platform_data
->qfrozen
++;
4557 if (ahc
->platform_data
->qfrozen
== 1) {
4558 scsi_block_requests(ahc
->platform_data
->host
);
4560 /* XXX What about Twin channels? */
4561 ahc_platform_abort_scbs(ahc
, CAM_TARGET_WILDCARD
, ALL_CHANNELS
,
4562 CAM_LUN_WILDCARD
, SCB_LIST_NULL
,
4563 ROLE_INITIATOR
, CAM_REQUEUE_REQ
);
4568 ahc_linux_release_simq(u_long arg
)
4570 struct ahc_softc
*ahc
;
4574 ahc
= (struct ahc_softc
*)arg
;
4578 if (ahc
->platform_data
->qfrozen
> 0)
4579 ahc
->platform_data
->qfrozen
--;
4580 if (ahc
->platform_data
->qfrozen
== 0)
4582 if (AHC_DV_SIMQ_FROZEN(ahc
)
4583 && ((ahc
->platform_data
->flags
& AHC_DV_WAIT_SIMQ_RELEASE
) != 0)) {
4584 ahc
->platform_data
->flags
&= ~AHC_DV_WAIT_SIMQ_RELEASE
;
4585 up(&ahc
->platform_data
->dv_sem
);
4587 ahc_schedule_runq(ahc
);
4588 ahc_unlock(ahc
, &s
);
4590 * There is still a race here. The mid-layer
4591 * should keep its own freeze count and use
4592 * a bottom half handler to run the queues
4593 * so we can unblock with our own lock held.
4596 scsi_unblock_requests(ahc
->platform_data
->host
);
4600 ahc_linux_dev_timed_unfreeze(u_long arg
)
4602 struct ahc_linux_device
*dev
;
4603 struct ahc_softc
*ahc
;
4606 dev
= (struct ahc_linux_device
*)arg
;
4607 ahc
= dev
->target
->ahc
;
4609 dev
->flags
&= ~AHC_DEV_TIMER_ACTIVE
;
4610 if (dev
->qfrozen
> 0)
4612 if (dev
->qfrozen
== 0
4613 && (dev
->flags
& AHC_DEV_ON_RUN_LIST
) == 0)
4614 ahc_linux_run_device_queue(ahc
, dev
);
4615 if (TAILQ_EMPTY(&dev
->busyq
)
4616 && dev
->active
== 0)
4617 __ahc_linux_free_device(ahc
, dev
);
4618 ahc_unlock(ahc
, &s
);
4622 ahc_linux_queue_recovery_cmd(Scsi_Cmnd
*cmd
, scb_flag flag
)
4624 struct ahc_softc
*ahc
;
4625 struct ahc_cmd
*acmd
;
4626 struct ahc_cmd
*list_acmd
;
4627 struct ahc_linux_device
*dev
;
4628 struct scb
*pending_scb
;
4631 u_int active_scb_index
;
4644 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
4645 acmd
= (struct ahc_cmd
*)cmd
;
4647 printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
4648 ahc_name(ahc
), cmd
->device
->channel
,
4649 cmd
->device
->id
, cmd
->device
->lun
,
4650 flag
== SCB_ABORT
? "n ABORT" : " TARGET RESET");
4653 for (cdb_byte
= 0; cdb_byte
< cmd
->cmd_len
; cdb_byte
++)
4654 printf(" 0x%x", cmd
->cmnd
[cdb_byte
]);
4658 * In all versions of Linux, we have to work around
4659 * a major flaw in how the mid-layer is locked down
4660 * if we are to sleep successfully in our error handler
4661 * while allowing our interrupt handler to run. Since
4662 * the midlayer acquires either the io_request_lock or
4663 * our lock prior to calling us, we must use the
4664 * spin_unlock_irq() method for unlocking our lock.
4665 * This will force interrupts to be enabled on the
4666 * current CPU. Since the EH thread should not have
4667 * been running with CPU interrupts disabled other than
4668 * by acquiring either the io_request_lock or our own
4669 * lock, this *should* be safe.
4671 ahc_midlayer_entrypoint_lock(ahc
, &s
);
4674 * First determine if we currently own this command.
4675 * Start by searching the device queue. If not found
4676 * there, check the pending_scb list. If not found
4677 * at all, and the system wanted us to just abort the
4678 * command, return success.
4680 dev
= ahc_linux_get_device(ahc
, cmd
->device
->channel
, cmd
->device
->id
,
4681 cmd
->device
->lun
, /*alloc*/FALSE
);
4685 * No target device for this command exists,
4686 * so we must not still own the command.
4688 printf("%s:%d:%d:%d: Is not an active device\n",
4689 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
4695 TAILQ_FOREACH(list_acmd
, &dev
->busyq
, acmd_links
.tqe
) {
4696 if (list_acmd
== acmd
)
4700 if (list_acmd
!= NULL
) {
4701 printf("%s:%d:%d:%d: Command found on device queue\n",
4702 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
4704 if (flag
== SCB_ABORT
) {
4705 TAILQ_REMOVE(&dev
->busyq
, list_acmd
, acmd_links
.tqe
);
4706 cmd
->result
= DID_ABORT
<< 16;
4707 ahc_linux_queue_cmd_complete(ahc
, cmd
);
4713 if ((dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
)) == 0
4714 && ahc_search_untagged_queues(ahc
, cmd
, cmd
->device
->id
,
4715 cmd
->device
->channel
+ 'A',
4717 CAM_REQ_ABORTED
, SEARCH_COMPLETE
) != 0) {
4718 printf("%s:%d:%d:%d: Command found on untagged queue\n",
4719 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
4726 * See if we can find a matching cmd in the pending list.
4728 LIST_FOREACH(pending_scb
, &ahc
->pending_scbs
, pending_links
) {
4729 if (pending_scb
->io_ctx
== cmd
)
4733 if (pending_scb
== NULL
&& flag
== SCB_DEVICE_RESET
) {
4735 /* Any SCB for this device will do for a target reset */
4736 LIST_FOREACH(pending_scb
, &ahc
->pending_scbs
, pending_links
) {
4737 if (ahc_match_scb(ahc
, pending_scb
, cmd
->device
->id
,
4738 cmd
->device
->channel
+ 'A',
4740 SCB_LIST_NULL
, ROLE_INITIATOR
) == 0)
4745 if (pending_scb
== NULL
) {
4746 printf("%s:%d:%d:%d: Command not found\n",
4747 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
4752 if ((pending_scb
->flags
& SCB_RECOVERY_SCB
) != 0) {
4754 * We can't queue two recovery actions using the same SCB
4761 * Ensure that the card doesn't do anything
4762 * behind our back and that we didn't "just" miss
4763 * an interrupt that would affect this cmd.
4765 was_paused
= ahc_is_paused(ahc
);
4766 ahc_pause_and_flushwork(ahc
);
4769 if ((pending_scb
->flags
& SCB_ACTIVE
) == 0) {
4770 printf("%s:%d:%d:%d: Command already completed\n",
4771 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
4776 printf("%s: At time of recovery, card was %spaused\n",
4777 ahc_name(ahc
), was_paused
? "" : "not ");
4778 ahc_dump_card_state(ahc
);
4780 disconnected
= TRUE
;
4781 if (flag
== SCB_ABORT
) {
4782 if (ahc_search_qinfifo(ahc
, cmd
->device
->id
,
4783 cmd
->device
->channel
+ 'A',
4785 pending_scb
->hscb
->tag
,
4786 ROLE_INITIATOR
, CAM_REQ_ABORTED
,
4787 SEARCH_COMPLETE
) > 0) {
4788 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
4789 ahc_name(ahc
), cmd
->device
->channel
,
4790 cmd
->device
->id
, cmd
->device
->lun
);
4794 } else if (ahc_search_qinfifo(ahc
, cmd
->device
->id
,
4795 cmd
->device
->channel
+ 'A',
4796 cmd
->device
->lun
, pending_scb
->hscb
->tag
,
4797 ROLE_INITIATOR
, /*status*/0,
4798 SEARCH_COUNT
) > 0) {
4799 disconnected
= FALSE
;
4802 if (disconnected
&& (ahc_inb(ahc
, SEQ_FLAGS
) & NOT_IDENTIFIED
) == 0) {
4803 struct scb
*bus_scb
;
4805 bus_scb
= ahc_lookup_scb(ahc
, ahc_inb(ahc
, SCB_TAG
));
4806 if (bus_scb
== pending_scb
)
4807 disconnected
= FALSE
;
4808 else if (flag
!= SCB_ABORT
4809 && ahc_inb(ahc
, SAVED_SCSIID
) == pending_scb
->hscb
->scsiid
4810 && ahc_inb(ahc
, SAVED_LUN
) == SCB_GET_LUN(pending_scb
))
4811 disconnected
= FALSE
;
4815 * At this point, pending_scb is the scb associated with the
4816 * passed in command. That command is currently active on the
4817 * bus, is in the disconnected state, or we're hoping to find
4818 * a command for the same target active on the bus to abuse to
4819 * send a BDR. Queue the appropriate message based on which of
4820 * these states we are in.
4822 last_phase
= ahc_inb(ahc
, LASTPHASE
);
4823 saved_scbptr
= ahc_inb(ahc
, SCBPTR
);
4824 active_scb_index
= ahc_inb(ahc
, SCB_TAG
);
4825 saved_scsiid
= ahc_inb(ahc
, SAVED_SCSIID
);
4826 if (last_phase
!= P_BUSFREE
4827 && (pending_scb
->hscb
->tag
== active_scb_index
4828 || (flag
== SCB_DEVICE_RESET
4829 && SCSIID_TARGET(ahc
, saved_scsiid
) == cmd
->device
->id
))) {
4832 * We're active on the bus, so assert ATN
4833 * and hope that the target responds.
4835 pending_scb
= ahc_lookup_scb(ahc
, active_scb_index
);
4836 pending_scb
->flags
|= SCB_RECOVERY_SCB
|flag
;
4837 ahc_outb(ahc
, MSG_OUT
, HOST_MSG
);
4838 ahc_outb(ahc
, SCSISIGO
, last_phase
|ATNO
);
4839 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
4840 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
4843 } else if (disconnected
) {
4846 * Actually re-queue this SCB in an attempt
4847 * to select the device before it reconnects.
4848 * In either case (selection or reselection),
4849 * we will now issue the approprate message
4850 * to the timed-out device.
4852 * Set the MK_MESSAGE control bit indicating
4853 * that we desire to send a message. We
4854 * also set the disconnected flag since
4855 * in the paging case there is no guarantee
4856 * that our SCB control byte matches the
4857 * version on the card. We don't want the
4858 * sequencer to abort the command thinking
4859 * an unsolicited reselection occurred.
4861 pending_scb
->hscb
->control
|= MK_MESSAGE
|DISCONNECTED
;
4862 pending_scb
->flags
|= SCB_RECOVERY_SCB
|flag
;
4865 * Remove any cached copy of this SCB in the
4866 * disconnected list in preparation for the
4867 * queuing of our abort SCB. We use the
4868 * same element in the SCB, SCB_NEXT, for
4869 * both the qinfifo and the disconnected list.
4871 ahc_search_disc_list(ahc
, cmd
->device
->id
,
4872 cmd
->device
->channel
+ 'A',
4873 cmd
->device
->lun
, pending_scb
->hscb
->tag
,
4874 /*stop_on_first*/TRUE
,
4876 /*save_state*/FALSE
);
4879 * In the non-paging case, the sequencer will
4880 * never re-reference the in-core SCB.
4881 * To make sure we are notified during
4882 * reslection, set the MK_MESSAGE flag in
4883 * the card's copy of the SCB.
4885 if ((ahc
->flags
& AHC_PAGESCBS
) == 0) {
4886 ahc_outb(ahc
, SCBPTR
, pending_scb
->hscb
->tag
);
4887 ahc_outb(ahc
, SCB_CONTROL
,
4888 ahc_inb(ahc
, SCB_CONTROL
)|MK_MESSAGE
);
4892 * Clear out any entries in the QINFIFO first
4893 * so we are the next SCB for this target
4896 ahc_search_qinfifo(ahc
, cmd
->device
->id
,
4897 cmd
->device
->channel
+ 'A',
4898 cmd
->device
->lun
, SCB_LIST_NULL
,
4899 ROLE_INITIATOR
, CAM_REQUEUE_REQ
,
4901 ahc_qinfifo_requeue_tail(ahc
, pending_scb
);
4902 ahc_outb(ahc
, SCBPTR
, saved_scbptr
);
4903 ahc_print_path(ahc
, pending_scb
);
4904 printf("Device is disconnected, re-queuing SCB\n");
4907 printf("%s:%d:%d:%d: Unable to deliver message\n",
4908 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
4916 * Our assumption is that if we don't have the command, no
4917 * recovery action was required, so we return success. Again,
4918 * the semantics of the mid-layer recovery engine are not
4919 * well defined, so this may change in time.
4926 struct timer_list timer
;
4929 ahc
->platform_data
->flags
|= AHC_UP_EH_SEMAPHORE
;
4930 spin_unlock_irq(&ahc
->platform_data
->spin_lock
);
4932 timer
.data
= (u_long
)ahc
;
4933 timer
.expires
= jiffies
+ (5 * HZ
);
4934 timer
.function
= ahc_linux_sem_timeout
;
4936 printf("Recovery code sleeping\n");
4937 down(&ahc
->platform_data
->eh_sem
);
4938 printf("Recovery code awake\n");
4939 ret
= del_timer_sync(&timer
);
4941 printf("Timer Expired\n");
4944 spin_lock_irq(&ahc
->platform_data
->spin_lock
);
4946 ahc_schedule_runq(ahc
);
4947 ahc_linux_run_complete_queue(ahc
);
4948 ahc_midlayer_entrypoint_unlock(ahc
, &s
);
4953 ahc_platform_dump_card_state(struct ahc_softc
*ahc
)
4955 struct ahc_linux_device
*dev
;
4963 maxchannel
= (ahc
->features
& AHC_TWIN
) ? 1 : 0;
4964 maxtarget
= (ahc
->features
& AHC_WIDE
) ? 15 : 7;
4965 for (channel
= 0; channel
<= maxchannel
; channel
++) {
4967 for (target
= 0; target
<=maxtarget
; target
++) {
4969 for (lun
= 0; lun
< AHC_NUM_LUNS
; lun
++) {
4970 struct ahc_cmd
*acmd
;
4972 dev
= ahc_linux_get_device(ahc
, channel
, target
,
4973 lun
, /*alloc*/FALSE
);
4977 printf("DevQ(%d:%d:%d): ",
4978 channel
, target
, lun
);
4980 TAILQ_FOREACH(acmd
, &dev
->busyq
,
4982 if (i
++ > AHC_SCB_MAX
)
4985 printf("%d waiting\n", i
);
4991 static void ahc_linux_exit(void);
4994 ahc_linux_init(void)
4996 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
4997 int rc
= ahc_linux_detect(&aic7xxx_driver_template
);
5003 scsi_register_module(MODULE_SCSI_HA
, &aic7xxx_driver_template
);
5004 if (aic7xxx_driver_template
.present
== 0) {
5005 scsi_unregister_module(MODULE_SCSI_HA
,
5006 &aic7xxx_driver_template
);
5015 ahc_linux_exit(void)
5017 struct ahc_softc
*ahc
;
5020 * Shutdown DV threads before going into the SCSI mid-layer.
5021 * This avoids situations where the mid-layer locks the entire
5022 * kernel so that waiting for our DV threads to exit leads
5025 TAILQ_FOREACH(ahc
, &ahc_tailq
, links
) {
5027 ahc_linux_kill_dv_thread(ahc
);
5030 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
5032 * In 2.4 we have to unregister from the PCI core _after_
5033 * unregistering from the scsi midlayer to avoid dangling
5036 scsi_unregister_module(MODULE_SCSI_HA
, &aic7xxx_driver_template
);
5038 ahc_linux_pci_exit();
5039 ahc_linux_eisa_exit();
5042 module_init(ahc_linux_init
);
5043 module_exit(ahc_linux_exit
);