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>
125 #include <scsi/scsi_transport.h>
126 #include <scsi/scsi_transport_spi.h>
128 static struct scsi_transport_template
*ahc_linux_transport_template
= NULL
;
131 * Include aiclib.c as part of our
132 * "module dependencies are hard" work around.
136 #include <linux/init.h> /* __setup */
137 #include <linux/mm.h> /* For fetching system memory size */
138 #include <linux/blkdev.h> /* For block_size() */
139 #include <linux/delay.h> /* For ssleep/msleep */
142 * Lock protecting manipulation of the ahc softc list.
144 spinlock_t ahc_list_spinlock
;
147 * Set this to the delay in seconds after SCSI bus reset.
148 * Note, we honor this only for the initial bus reset.
149 * The scsi error recovery code performs its own bus settle
150 * delay handling for error recovery actions.
152 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
153 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
155 #define AIC7XXX_RESET_DELAY 5000
159 * Control collection of SCSI transfer statistics for the /proc filesystem.
161 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
162 * NOTE: This does affect performance since it has to maintain statistics.
164 #ifdef CONFIG_AIC7XXX_PROC_STATS
165 #define AIC7XXX_PROC_STATS
169 * To change the default number of tagged transactions allowed per-device,
170 * add a line to the lilo.conf file like:
171 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
172 * which will result in the first four devices on the first two
173 * controllers being set to a tagged queue depth of 32.
175 * The tag_commands is an array of 16 to allow for wide and twin adapters.
176 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
180 uint8_t tag_commands
[16]; /* Allow for wide/twin adapters. */
181 } adapter_tag_info_t
;
184 * Modify this as you see fit for your system.
186 * 0 tagged queuing disabled
187 * 1 <= n <= 253 n == max tags ever dispatched.
189 * The driver will throttle the number of commands dispatched to a
190 * device if it returns queue full. For devices with a fixed maximum
191 * queue depth, the driver will eventually determine this depth and
192 * lock it in (a console message is printed to indicate that a lock
193 * has occurred). On some devices, queue full is returned for a temporary
194 * resource shortage. These devices will return queue full at varying
195 * depths. The driver will throttle back when the queue fulls occur and
196 * attempt to slowly increase the depth over time as the device recovers
197 * from the resource shortage.
199 * In this example, the first line will disable tagged queueing for all
200 * the devices on the first probed aic7xxx adapter.
202 * The second line enables tagged queueing with 4 commands/LUN for IDs
203 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
204 * driver to attempt to use up to 64 tags for ID 1.
206 * The third line is the same as the first line.
208 * The fourth line disables tagged queueing for devices 0 and 3. It
209 * enables tagged queueing for the other IDs, with 16 commands/LUN
210 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
211 * IDs 2, 5-7, and 9-15.
215 * NOTE: The below structure is for reference only, the actual structure
216 * to modify in order to change things is just below this comment block.
217 adapter_tag_info_t aic7xxx_tag_info[] =
219 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
220 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
221 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
222 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
226 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
227 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
229 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
232 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
233 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
234 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
235 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
236 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
237 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
238 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
239 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
240 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
244 * By default, use the number of commands specified by
245 * the users kernel configuration.
247 static adapter_tag_info_t aic7xxx_tag_info
[] =
249 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
250 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
251 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
252 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
253 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
254 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
255 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
256 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
257 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
258 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
259 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
260 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
261 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
262 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
263 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
264 {AIC7XXX_CONFIGED_TAG_COMMANDS
}
268 * There should be a specific return value for this in scsi.h, but
269 * it seems that most drivers ignore it.
271 #define DID_UNDERFLOW DID_ERROR
274 ahc_print_path(struct ahc_softc
*ahc
, struct scb
*scb
)
276 printk("(scsi%d:%c:%d:%d): ",
277 ahc
->platform_data
->host
->host_no
,
278 scb
!= NULL
? SCB_GET_CHANNEL(ahc
, scb
) : 'X',
279 scb
!= NULL
? SCB_GET_TARGET(ahc
, scb
) : -1,
280 scb
!= NULL
? SCB_GET_LUN(scb
) : -1);
284 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
285 * cards in the system. This should be fixed. Exceptions to this
286 * rule are noted in the comments.
290 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
291 * has no effect on any later resets that might occur due to things like
294 static uint32_t aic7xxx_no_reset
;
297 * Certain PCI motherboards will scan PCI devices from highest to lowest,
298 * others scan from lowest to highest, and they tend to do all kinds of
299 * strange things when they come into contact with PCI bridge chips. The
300 * net result of all this is that the PCI card that is actually used to boot
301 * the machine is very hard to detect. Most motherboards go from lowest
302 * PCI slot number to highest, and the first SCSI controller found is the
303 * one you boot from. The only exceptions to this are when a controller
304 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
305 * from lowest PCI slot number to highest PCI slot number. We also force
306 * all controllers with their BIOS disabled to the end of the list. This
307 * works on *almost* all computers. Where it doesn't work, we have this
308 * option. Setting this option to non-0 will reverse the order of the sort
309 * to highest first, then lowest, but will still leave cards with their BIOS
310 * disabled at the very end. That should fix everyone up unless there are
311 * really strange cirumstances.
313 static uint32_t aic7xxx_reverse_scan
;
316 * Should we force EXTENDED translation on a controller.
317 * 0 == Use whatever is in the SEEPROM or default to off
318 * 1 == Use whatever is in the SEEPROM or default to on
320 static uint32_t aic7xxx_extended
;
323 * PCI bus parity checking of the Adaptec controllers. This is somewhat
324 * dubious at best. To my knowledge, this option has never actually
325 * solved a PCI parity problem, but on certain machines with broken PCI
326 * chipset configurations where stray PCI transactions with bad parity are
327 * the norm rather than the exception, the error messages can be overwelming.
328 * It's included in the driver for completeness.
329 * 0 = Shut off PCI parity check
330 * non-0 = reverse polarity pci parity checking
332 static uint32_t aic7xxx_pci_parity
= ~0;
335 * Certain newer motherboards have put new PCI based devices into the
336 * IO spaces that used to typically be occupied by VLB or EISA cards.
337 * This overlap can cause these newer motherboards to lock up when scanned
338 * for older EISA and VLB devices. Setting this option to non-0 will
339 * cause the driver to skip scanning for any VLB or EISA controllers and
340 * only support the PCI controllers. NOTE: this means that if the kernel
341 * os compiled with PCI support disabled, then setting this to non-0
342 * would result in never finding any devices :)
344 #ifndef CONFIG_AIC7XXX_PROBE_EISA_VL
345 uint32_t aic7xxx_probe_eisa_vl
;
347 uint32_t aic7xxx_probe_eisa_vl
= ~0;
351 * There are lots of broken chipsets in the world. Some of them will
352 * violate the PCI spec when we issue byte sized memory writes to our
353 * controller. I/O mapped register access, if allowed by the given
354 * platform, will work in almost all cases.
356 uint32_t aic7xxx_allow_memio
= ~0;
359 * aic7xxx_detect() has been run, so register all device arrivals
360 * immediately with the system rather than deferring to the sorted
361 * attachment performed by aic7xxx_detect().
363 int aic7xxx_detect_complete
;
366 * So that we can set how long each device is given as a selection timeout.
367 * The table of values goes like this:
372 * We default to 256ms because some older devices need a longer time
373 * to respond to initial selection.
375 static uint32_t aic7xxx_seltime
;
378 * Certain devices do not perform any aging on commands. Should the
379 * device be saturated by commands in one portion of the disk, it is
380 * possible for transactions on far away sectors to never be serviced.
381 * To handle these devices, we can periodically send an ordered tag to
382 * force all outstanding transactions to be serviced prior to a new
385 uint32_t aic7xxx_periodic_otag
;
388 * Module information and settable options.
390 static char *aic7xxx
= NULL
;
392 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
393 MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
394 MODULE_LICENSE("Dual BSD/GPL");
395 MODULE_VERSION(AIC7XXX_DRIVER_VERSION
);
396 module_param(aic7xxx
, charp
, 0444);
397 MODULE_PARM_DESC(aic7xxx
,
398 "period delimited, options string.\n"
399 " verbose Enable verbose/diagnostic logging\n"
400 " allow_memio Allow device registers to be memory mapped\n"
401 " debug Bitmask of debug values to enable\n"
402 " no_probe Toggle EISA/VLB controller probing\n"
403 " probe_eisa_vl Toggle EISA/VLB controller probing\n"
404 " no_reset Supress initial bus resets\n"
405 " extended Enable extended geometry on all controllers\n"
406 " periodic_otag Send an ordered tagged transaction\n"
407 " periodically to prevent tag starvation.\n"
408 " This may be required by some older disk\n"
409 " drives or RAID arrays.\n"
410 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
411 " tag_info:<tag_str> Set per-target tag depth\n"
412 " global_tag_depth:<int> Global tag depth for every target\n"
414 " seltime:<int> Selection Timeout\n"
415 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
417 " Sample /etc/modprobe.conf line:\n"
418 " Toggle EISA/VLB probing\n"
419 " Set tag depth on Controller 1/Target 1 to 10 tags\n"
420 " Shorten the selection timeout to 128ms\n"
422 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
425 static void ahc_linux_handle_scsi_status(struct ahc_softc
*,
426 struct ahc_linux_device
*,
428 static void ahc_linux_queue_cmd_complete(struct ahc_softc
*ahc
,
429 struct scsi_cmnd
*cmd
);
430 static void ahc_linux_sem_timeout(u_long arg
);
431 static void ahc_linux_freeze_simq(struct ahc_softc
*ahc
);
432 static void ahc_linux_release_simq(u_long arg
);
433 static void ahc_linux_dev_timed_unfreeze(u_long arg
);
434 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd
*cmd
, scb_flag flag
);
435 static void ahc_linux_initialize_scsi_bus(struct ahc_softc
*ahc
);
436 static void ahc_linux_thread_run_complete_queue(struct ahc_softc
*ahc
);
437 static u_int
ahc_linux_user_tagdepth(struct ahc_softc
*ahc
,
438 struct ahc_devinfo
*devinfo
);
439 static void ahc_linux_device_queue_depth(struct ahc_softc
*ahc
,
440 struct ahc_linux_device
*dev
);
441 static struct ahc_linux_target
* ahc_linux_alloc_target(struct ahc_softc
*,
443 static void ahc_linux_free_target(struct ahc_softc
*,
444 struct ahc_linux_target
*);
445 static struct ahc_linux_device
* ahc_linux_alloc_device(struct ahc_softc
*,
446 struct ahc_linux_target
*,
448 static void ahc_linux_free_device(struct ahc_softc
*,
449 struct ahc_linux_device
*);
450 static int ahc_linux_run_command(struct ahc_softc
*,
451 struct ahc_linux_device
*,
453 static void ahc_linux_setup_tag_info_global(char *p
);
454 static aic_option_callback_t ahc_linux_setup_tag_info
;
455 static int aic7xxx_setup(char *s
);
456 static int ahc_linux_next_unit(void);
457 static struct ahc_cmd
*ahc_linux_run_complete_queue(struct ahc_softc
*ahc
);
459 /********************************* Inlines ************************************/
460 static __inline
struct ahc_linux_device
*
461 ahc_linux_get_device(struct ahc_softc
*ahc
, u_int channel
,
462 u_int target
, u_int lun
, int alloc
);
463 static __inline
void ahc_schedule_completeq(struct ahc_softc
*ahc
);
464 static __inline
void ahc_linux_unmap_scb(struct ahc_softc
*, struct scb
*);
466 static __inline
int ahc_linux_map_seg(struct ahc_softc
*ahc
, struct scb
*scb
,
467 struct ahc_dma_seg
*sg
,
468 dma_addr_t addr
, bus_size_t len
);
471 ahc_schedule_completeq(struct ahc_softc
*ahc
)
473 if ((ahc
->platform_data
->flags
& AHC_RUN_CMPLT_Q_TIMER
) == 0) {
474 ahc
->platform_data
->flags
|= AHC_RUN_CMPLT_Q_TIMER
;
475 ahc
->platform_data
->completeq_timer
.expires
= jiffies
;
476 add_timer(&ahc
->platform_data
->completeq_timer
);
480 static __inline
struct ahc_linux_device
*
481 ahc_linux_get_device(struct ahc_softc
*ahc
, u_int channel
, u_int target
,
482 u_int lun
, int alloc
)
484 struct ahc_linux_target
*targ
;
485 struct ahc_linux_device
*dev
;
488 target_offset
= target
;
491 targ
= ahc
->platform_data
->targets
[target_offset
];
494 targ
= ahc_linux_alloc_target(ahc
, channel
, target
);
500 dev
= targ
->devices
[lun
];
501 if (dev
== NULL
&& alloc
!= 0)
502 dev
= ahc_linux_alloc_device(ahc
, targ
, lun
);
506 #define AHC_LINUX_MAX_RETURNED_ERRORS 4
507 static struct ahc_cmd
*
508 ahc_linux_run_complete_queue(struct ahc_softc
*ahc
)
510 struct ahc_cmd
*acmd
;
514 while ((acmd
= TAILQ_FIRST(&ahc
->platform_data
->completeq
)) != NULL
) {
515 struct scsi_cmnd
*cmd
;
517 if (with_errors
> AHC_LINUX_MAX_RETURNED_ERRORS
) {
519 * Linux uses stack recursion to requeue
520 * commands that need to be retried. Avoid
521 * blowing out the stack by "spoon feeding"
522 * commands that completed with error back
523 * the operating system in case they are going
524 * to be retried. "ick"
526 ahc_schedule_completeq(ahc
);
529 TAILQ_REMOVE(&ahc
->platform_data
->completeq
,
530 acmd
, acmd_links
.tqe
);
531 cmd
= &acmd_scsi_cmd(acmd
);
532 cmd
->host_scribble
= NULL
;
533 if (ahc_cmd_get_transaction_status(cmd
) != DID_OK
534 || (cmd
->result
& 0xFF) != SCSI_STATUS_OK
)
543 ahc_linux_unmap_scb(struct ahc_softc
*ahc
, struct scb
*scb
)
545 struct scsi_cmnd
*cmd
;
548 ahc_sync_sglist(ahc
, scb
, BUS_DMASYNC_POSTWRITE
);
549 if (cmd
->use_sg
!= 0) {
550 struct scatterlist
*sg
;
552 sg
= (struct scatterlist
*)cmd
->request_buffer
;
553 pci_unmap_sg(ahc
->dev_softc
, sg
, cmd
->use_sg
,
554 cmd
->sc_data_direction
);
555 } else if (cmd
->request_bufflen
!= 0) {
556 pci_unmap_single(ahc
->dev_softc
,
557 scb
->platform_data
->buf_busaddr
,
558 cmd
->request_bufflen
,
559 cmd
->sc_data_direction
);
564 ahc_linux_map_seg(struct ahc_softc
*ahc
, struct scb
*scb
,
565 struct ahc_dma_seg
*sg
, dma_addr_t addr
, bus_size_t len
)
569 if ((scb
->sg_count
+ 1) > AHC_NSEG
)
570 panic("Too few segs for dma mapping. "
571 "Increase AHC_NSEG\n");
574 sg
->addr
= ahc_htole32(addr
& 0xFFFFFFFF);
575 scb
->platform_data
->xfer_len
+= len
;
577 if (sizeof(dma_addr_t
) > 4
578 && (ahc
->flags
& AHC_39BIT_ADDRESSING
) != 0)
579 len
|= (addr
>> 8) & AHC_SG_HIGH_ADDR_MASK
;
581 sg
->len
= ahc_htole32(len
);
586 * Try to detect an Adaptec 7XXX controller.
589 ahc_linux_detect(struct scsi_host_template
*template)
591 struct ahc_softc
*ahc
;
595 * Sanity checking of Linux SCSI data structures so
596 * that some of our hacks^H^H^H^H^Hassumptions aren't
599 if (offsetof(struct ahc_cmd_internal
, end
)
600 > offsetof(struct scsi_cmnd
, host_scribble
)) {
601 printf("ahc_linux_detect: SCSI data structures changed.\n");
602 printf("ahc_linux_detect: Unable to attach\n");
606 * If we've been passed any parameters, process them now.
609 aic7xxx_setup(aic7xxx
);
611 template->proc_name
= "aic7xxx";
614 * Initialize our softc list lock prior to
615 * probing for any adapters.
619 found
= ahc_linux_pci_init();
620 if (!ahc_linux_eisa_init())
624 * Register with the SCSI layer all
625 * controllers we've found.
627 TAILQ_FOREACH(ahc
, &ahc_tailq
, links
) {
629 if (ahc_linux_register_host(ahc
, template) == 0)
633 aic7xxx_detect_complete
++;
639 * Return a string describing the driver.
642 ahc_linux_info(struct Scsi_Host
*host
)
644 static char buffer
[512];
647 struct ahc_softc
*ahc
;
650 ahc
= *(struct ahc_softc
**)host
->hostdata
;
651 memset(bp
, 0, sizeof(buffer
));
652 strcpy(bp
, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
653 strcat(bp
, AIC7XXX_DRIVER_VERSION
);
656 strcat(bp
, ahc
->description
);
659 ahc_controller_info(ahc
, ahc_info
);
660 strcat(bp
, ahc_info
);
667 * Queue an SCB to the controller.
670 ahc_linux_queue(struct scsi_cmnd
* cmd
, void (*scsi_done
) (struct scsi_cmnd
*))
672 struct ahc_softc
*ahc
;
673 struct ahc_linux_device
*dev
;
675 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
678 * Save the callback on completion function.
680 cmd
->scsi_done
= scsi_done
;
683 * Close the race of a command that was in the process of
684 * being queued to us just as our simq was frozen. Let
685 * DV commands through so long as we are only frozen to
688 if (ahc
->platform_data
->qfrozen
!= 0)
689 return SCSI_MLQUEUE_HOST_BUSY
;
691 dev
= ahc_linux_get_device(ahc
, cmd
->device
->channel
, cmd
->device
->id
,
692 cmd
->device
->lun
, /*alloc*/TRUE
);
695 cmd
->result
= CAM_REQ_INPROG
<< 16;
697 return ahc_linux_run_command(ahc
, dev
, cmd
);
701 ahc_linux_slave_alloc(struct scsi_device
*device
)
703 struct ahc_softc
*ahc
;
705 ahc
= *((struct ahc_softc
**)device
->host
->hostdata
);
707 printf("%s: Slave Alloc %d\n", ahc_name(ahc
), device
->id
);
712 ahc_linux_slave_configure(struct scsi_device
*device
)
714 struct ahc_softc
*ahc
;
715 struct ahc_linux_device
*dev
;
717 ahc
= *((struct ahc_softc
**)device
->host
->hostdata
);
719 printf("%s: Slave Configure %d\n", ahc_name(ahc
), device
->id
);
721 * Since Linux has attached to the device, configure
722 * it so we don't free and allocate the device
723 * structure on every command.
725 dev
= ahc_linux_get_device(ahc
, device
->channel
,
726 device
->id
, device
->lun
,
729 dev
->flags
&= ~AHC_DEV_UNCONFIGURED
;
730 dev
->scsi_device
= device
;
731 ahc_linux_device_queue_depth(ahc
, dev
);
734 /* Initial Domain Validation */
735 if (!spi_initial_dv(device
->sdev_target
))
736 spi_dv_device(device
);
742 ahc_linux_slave_destroy(struct scsi_device
*device
)
744 struct ahc_softc
*ahc
;
745 struct ahc_linux_device
*dev
;
747 ahc
= *((struct ahc_softc
**)device
->host
->hostdata
);
749 printf("%s: Slave Destroy %d\n", ahc_name(ahc
), device
->id
);
750 dev
= ahc_linux_get_device(ahc
, device
->channel
,
751 device
->id
, device
->lun
,
754 * Filter out "silly" deletions of real devices by only
755 * deleting devices that have had slave_configure()
756 * called on them. All other devices that have not
757 * been configured will automatically be deleted by
758 * the refcounting process.
761 && (dev
->flags
& AHC_DEV_SLAVE_CONFIGURED
) != 0) {
762 dev
->flags
|= AHC_DEV_UNCONFIGURED
;
764 && (dev
->flags
& AHC_DEV_TIMER_ACTIVE
) == 0)
765 ahc_linux_free_device(ahc
, dev
);
769 #if defined(__i386__)
771 * Return the disk geometry for the given SCSI device.
774 ahc_linux_biosparam(struct scsi_device
*sdev
, struct block_device
*bdev
,
775 sector_t capacity
, int geom
[])
783 struct ahc_softc
*ahc
;
786 ahc
= *((struct ahc_softc
**)sdev
->host
->hostdata
);
787 channel
= sdev
->channel
;
789 bh
= scsi_bios_ptable(bdev
);
791 ret
= scsi_partsize(bh
, capacity
,
792 &geom
[2], &geom
[0], &geom
[1]);
799 cylinders
= aic_sector_div(capacity
, heads
, sectors
);
801 if (aic7xxx_extended
!= 0)
803 else if (channel
== 0)
804 extended
= (ahc
->flags
& AHC_EXTENDED_TRANS_A
) != 0;
806 extended
= (ahc
->flags
& AHC_EXTENDED_TRANS_B
) != 0;
807 if (extended
&& cylinders
>= 1024) {
810 cylinders
= aic_sector_div(capacity
, heads
, sectors
);
820 * Abort the current SCSI command(s).
823 ahc_linux_abort(struct scsi_cmnd
*cmd
)
827 error
= ahc_linux_queue_recovery_cmd(cmd
, SCB_ABORT
);
829 printf("aic7xxx_abort returns 0x%x\n", error
);
834 * Attempt to send a target reset message to the device that timed out.
837 ahc_linux_dev_reset(struct scsi_cmnd
*cmd
)
841 error
= ahc_linux_queue_recovery_cmd(cmd
, SCB_DEVICE_RESET
);
843 printf("aic7xxx_dev_reset returns 0x%x\n", error
);
848 * Reset the SCSI bus.
851 ahc_linux_bus_reset(struct scsi_cmnd
*cmd
)
853 struct ahc_softc
*ahc
;
856 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
857 found
= ahc_reset_channel(ahc
, cmd
->device
->channel
+ 'A',
858 /*initiate reset*/TRUE
);
859 ahc_linux_run_complete_queue(ahc
);
862 printf("%s: SCSI bus reset delivered. "
863 "%d SCBs aborted.\n", ahc_name(ahc
), found
);
868 struct scsi_host_template aic7xxx_driver_template
= {
869 .module
= THIS_MODULE
,
871 .proc_info
= ahc_linux_proc_info
,
872 .info
= ahc_linux_info
,
873 .queuecommand
= ahc_linux_queue
,
874 .eh_abort_handler
= ahc_linux_abort
,
875 .eh_device_reset_handler
= ahc_linux_dev_reset
,
876 .eh_bus_reset_handler
= ahc_linux_bus_reset
,
877 #if defined(__i386__)
878 .bios_param
= ahc_linux_biosparam
,
880 .can_queue
= AHC_MAX_QUEUE
,
883 .use_clustering
= ENABLE_CLUSTERING
,
884 .slave_alloc
= ahc_linux_slave_alloc
,
885 .slave_configure
= ahc_linux_slave_configure
,
886 .slave_destroy
= ahc_linux_slave_destroy
,
889 /**************************** Tasklet Handler *********************************/
891 /******************************** Macros **************************************/
892 #define BUILD_SCSIID(ahc, cmd) \
893 ((((cmd)->device->id << TID_SHIFT) & TID) \
894 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
895 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
897 /******************************** Bus DMA *************************************/
899 ahc_dma_tag_create(struct ahc_softc
*ahc
, bus_dma_tag_t parent
,
900 bus_size_t alignment
, bus_size_t boundary
,
901 dma_addr_t lowaddr
, dma_addr_t highaddr
,
902 bus_dma_filter_t
*filter
, void *filterarg
,
903 bus_size_t maxsize
, int nsegments
,
904 bus_size_t maxsegsz
, int flags
, bus_dma_tag_t
*ret_tag
)
908 dmat
= malloc(sizeof(*dmat
), M_DEVBUF
, M_NOWAIT
);
913 * Linux is very simplistic about DMA memory. For now don't
914 * maintain all specification information. Once Linux supplies
915 * better facilities for doing these operations, or the
916 * needs of this particular driver change, we might need to do
919 dmat
->alignment
= alignment
;
920 dmat
->boundary
= boundary
;
921 dmat
->maxsize
= maxsize
;
927 ahc_dma_tag_destroy(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
)
929 free(dmat
, M_DEVBUF
);
933 ahc_dmamem_alloc(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, void** vaddr
,
934 int flags
, bus_dmamap_t
*mapp
)
936 *vaddr
= pci_alloc_consistent(ahc
->dev_softc
,
937 dmat
->maxsize
, mapp
);
944 ahc_dmamem_free(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
,
945 void* vaddr
, bus_dmamap_t map
)
947 pci_free_consistent(ahc
->dev_softc
, dmat
->maxsize
,
952 ahc_dmamap_load(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
,
953 void *buf
, bus_size_t buflen
, bus_dmamap_callback_t
*cb
,
954 void *cb_arg
, int flags
)
957 * Assume for now that this will only be used during
958 * initialization and not for per-transaction buffer mapping.
960 bus_dma_segment_t stack_sg
;
962 stack_sg
.ds_addr
= map
;
963 stack_sg
.ds_len
= dmat
->maxsize
;
964 cb(cb_arg
, &stack_sg
, /*nseg*/1, /*error*/0);
969 ahc_dmamap_destroy(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
)
974 ahc_dmamap_unload(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
)
980 /********************* Platform Dependent Functions ***************************/
982 * Compare "left hand" softc with "right hand" softc, returning:
983 * < 0 - lahc has a lower priority than rahc
984 * 0 - Softcs are equal
985 * > 0 - lahc has a higher priority than rahc
988 ahc_softc_comp(struct ahc_softc
*lahc
, struct ahc_softc
*rahc
)
995 * Under Linux, cards are ordered as follows:
996 * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
997 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
998 * 3) All remaining VLB/EISA devices sorted by ioport.
999 * 4) All remaining PCI devices sorted by bus/slot/func.
1001 value
= (lahc
->flags
& AHC_BIOS_ENABLED
)
1002 - (rahc
->flags
& AHC_BIOS_ENABLED
);
1004 /* Controllers with BIOS enabled have a *higher* priority */
1008 * Same BIOS setting, now sort based on bus type.
1009 * EISA and VL controllers sort together. EISA/VL
1010 * have higher priority than PCI.
1012 rvalue
= (rahc
->chip
& AHC_BUS_MASK
);
1013 if (rvalue
== AHC_VL
)
1015 lvalue
= (lahc
->chip
& AHC_BUS_MASK
);
1016 if (lvalue
== AHC_VL
)
1018 value
= rvalue
- lvalue
;
1022 /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
1027 char primary_channel
;
1029 if (aic7xxx_reverse_scan
!= 0)
1030 value
= ahc_get_pci_bus(lahc
->dev_softc
)
1031 - ahc_get_pci_bus(rahc
->dev_softc
);
1033 value
= ahc_get_pci_bus(rahc
->dev_softc
)
1034 - ahc_get_pci_bus(lahc
->dev_softc
);
1037 if (aic7xxx_reverse_scan
!= 0)
1038 value
= ahc_get_pci_slot(lahc
->dev_softc
)
1039 - ahc_get_pci_slot(rahc
->dev_softc
);
1041 value
= ahc_get_pci_slot(rahc
->dev_softc
)
1042 - ahc_get_pci_slot(lahc
->dev_softc
);
1046 * On multi-function devices, the user can choose
1047 * to have function 1 probed before function 0.
1048 * Give whichever channel is the primary channel
1049 * the highest priority.
1051 primary_channel
= (lahc
->flags
& AHC_PRIMARY_CHANNEL
) + 'A';
1053 if (lahc
->channel
== primary_channel
)
1059 if ((rahc
->flags
& AHC_BIOS_ENABLED
) != 0) {
1060 value
= rahc
->platform_data
->bios_address
1061 - lahc
->platform_data
->bios_address
;
1063 value
= rahc
->bsh
.ioport
1068 panic("ahc_softc_sort: invalid bus type");
1074 ahc_linux_setup_tag_info_global(char *p
)
1078 tags
= simple_strtoul(p
+ 1, NULL
, 0) & 0xff;
1079 printf("Setting Global Tags= %d\n", tags
);
1081 for (i
= 0; i
< NUM_ELEMENTS(aic7xxx_tag_info
); i
++) {
1082 for (j
= 0; j
< AHC_NUM_TARGETS
; j
++) {
1083 aic7xxx_tag_info
[i
].tag_commands
[j
] = tags
;
1089 ahc_linux_setup_tag_info(u_long arg
, int instance
, int targ
, int32_t value
)
1092 if ((instance
>= 0) && (targ
>= 0)
1093 && (instance
< NUM_ELEMENTS(aic7xxx_tag_info
))
1094 && (targ
< AHC_NUM_TARGETS
)) {
1095 aic7xxx_tag_info
[instance
].tag_commands
[targ
] = value
& 0xff;
1097 printf("tag_info[%d:%d] = %d\n", instance
, targ
, value
);
1102 * Handle Linux boot parameters. This routine allows for assigning a value
1103 * to a parameter with a ':' between the parameter and the value.
1104 * ie. aic7xxx=stpwlev:1,extended
1107 aic7xxx_setup(char *s
)
1117 { "extended", &aic7xxx_extended
},
1118 { "no_reset", &aic7xxx_no_reset
},
1119 { "verbose", &aic7xxx_verbose
},
1120 { "allow_memio", &aic7xxx_allow_memio
},
1122 { "debug", &ahc_debug
},
1124 { "reverse_scan", &aic7xxx_reverse_scan
},
1125 { "no_probe", &aic7xxx_probe_eisa_vl
},
1126 { "probe_eisa_vl", &aic7xxx_probe_eisa_vl
},
1127 { "periodic_otag", &aic7xxx_periodic_otag
},
1128 { "pci_parity", &aic7xxx_pci_parity
},
1129 { "seltime", &aic7xxx_seltime
},
1130 { "tag_info", NULL
},
1131 { "global_tag_depth", NULL
},
1135 end
= strchr(s
, '\0');
1138 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1139 * will never be 0 in this case.
1143 while ((p
= strsep(&s
, ",.")) != NULL
) {
1146 for (i
= 0; i
< NUM_ELEMENTS(options
); i
++) {
1148 n
= strlen(options
[i
].name
);
1149 if (strncmp(options
[i
].name
, p
, n
) == 0)
1152 if (i
== NUM_ELEMENTS(options
))
1155 if (strncmp(p
, "global_tag_depth", n
) == 0) {
1156 ahc_linux_setup_tag_info_global(p
+ n
);
1157 } else if (strncmp(p
, "tag_info", n
) == 0) {
1158 s
= aic_parse_brace_option("tag_info", p
+ n
, end
,
1159 2, ahc_linux_setup_tag_info
, 0);
1160 } else if (p
[n
] == ':') {
1161 *(options
[i
].flag
) = simple_strtoul(p
+ n
+ 1, NULL
, 0);
1162 } else if (strncmp(p
, "verbose", n
) == 0) {
1163 *(options
[i
].flag
) = 1;
1165 *(options
[i
].flag
) ^= 0xFFFFFFFF;
1171 __setup("aic7xxx=", aic7xxx_setup
);
1173 uint32_t aic7xxx_verbose
;
1176 ahc_linux_register_host(struct ahc_softc
*ahc
, struct scsi_host_template
*template)
1179 struct Scsi_Host
*host
;
1183 template->name
= ahc
->description
;
1184 host
= scsi_host_alloc(template, sizeof(struct ahc_softc
*));
1188 *((struct ahc_softc
**)host
->hostdata
) = ahc
;
1190 scsi_assign_lock(host
, &ahc
->platform_data
->spin_lock
);
1191 ahc
->platform_data
->host
= host
;
1192 host
->can_queue
= AHC_MAX_QUEUE
;
1193 host
->cmd_per_lun
= 2;
1194 /* XXX No way to communicate the ID for multiple channels */
1195 host
->this_id
= ahc
->our_id
;
1196 host
->irq
= ahc
->platform_data
->irq
;
1197 host
->max_id
= (ahc
->features
& AHC_WIDE
) ? 16 : 8;
1198 host
->max_lun
= AHC_NUM_LUNS
;
1199 host
->max_channel
= (ahc
->features
& AHC_TWIN
) ? 1 : 0;
1200 host
->sg_tablesize
= AHC_NSEG
;
1201 ahc_set_unit(ahc
, ahc_linux_next_unit());
1202 sprintf(buf
, "scsi%d", host
->host_no
);
1203 new_name
= malloc(strlen(buf
) + 1, M_DEVBUF
, M_NOWAIT
);
1204 if (new_name
!= NULL
) {
1205 strcpy(new_name
, buf
);
1206 ahc_set_name(ahc
, new_name
);
1208 host
->unique_id
= ahc
->unit
;
1209 ahc_linux_initialize_scsi_bus(ahc
);
1210 ahc_intr_enable(ahc
, TRUE
);
1211 ahc_unlock(ahc
, &s
);
1213 host
->transportt
= ahc_linux_transport_template
;
1215 scsi_add_host(host
, (ahc
->dev_softc
? &ahc
->dev_softc
->dev
: NULL
)); /* XXX handle failure */
1216 scsi_scan_host(host
);
1221 ahc_linux_get_memsize(void)
1226 return ((uint64_t)si
.totalram
<< PAGE_SHIFT
);
1230 * Find the smallest available unit number to use
1231 * for a new device. We don't just use a static
1232 * count to handle the "repeated hot-(un)plug"
1236 ahc_linux_next_unit(void)
1238 struct ahc_softc
*ahc
;
1243 TAILQ_FOREACH(ahc
, &ahc_tailq
, links
) {
1244 if (ahc
->unit
== unit
) {
1253 * Place the SCSI bus into a known state by either resetting it,
1254 * or forcing transfer negotiations on the next command to any
1258 ahc_linux_initialize_scsi_bus(struct ahc_softc
*ahc
)
1266 if (aic7xxx_no_reset
!= 0)
1267 ahc
->flags
&= ~(AHC_RESET_BUS_A
|AHC_RESET_BUS_B
);
1269 if ((ahc
->flags
& AHC_RESET_BUS_A
) != 0)
1270 ahc_reset_channel(ahc
, 'A', /*initiate_reset*/TRUE
);
1272 numtarg
= (ahc
->features
& AHC_WIDE
) ? 16 : 8;
1274 if ((ahc
->features
& AHC_TWIN
) != 0) {
1276 if ((ahc
->flags
& AHC_RESET_BUS_B
) != 0) {
1277 ahc_reset_channel(ahc
, 'B', /*initiate_reset*/TRUE
);
1286 * Force negotiation to async for all targets that
1287 * will not see an initial bus reset.
1289 for (; i
< numtarg
; i
++) {
1290 struct ahc_devinfo devinfo
;
1291 struct ahc_initiator_tinfo
*tinfo
;
1292 struct ahc_tmode_tstate
*tstate
;
1298 our_id
= ahc
->our_id
;
1300 if (i
> 7 && (ahc
->features
& AHC_TWIN
) != 0) {
1302 our_id
= ahc
->our_id_b
;
1305 tinfo
= ahc_fetch_transinfo(ahc
, channel
, our_id
,
1306 target_id
, &tstate
);
1307 ahc_compile_devinfo(&devinfo
, our_id
, target_id
,
1308 CAM_LUN_WILDCARD
, channel
, ROLE_INITIATOR
);
1309 ahc_update_neg_request(ahc
, &devinfo
, tstate
,
1310 tinfo
, AHC_NEG_ALWAYS
);
1312 /* Give the bus some time to recover */
1313 if ((ahc
->flags
& (AHC_RESET_BUS_A
|AHC_RESET_BUS_B
)) != 0) {
1314 ahc_linux_freeze_simq(ahc
);
1315 init_timer(&ahc
->platform_data
->reset_timer
);
1316 ahc
->platform_data
->reset_timer
.data
= (u_long
)ahc
;
1317 ahc
->platform_data
->reset_timer
.expires
=
1318 jiffies
+ (AIC7XXX_RESET_DELAY
* HZ
)/1000;
1319 ahc
->platform_data
->reset_timer
.function
=
1320 ahc_linux_release_simq
;
1321 add_timer(&ahc
->platform_data
->reset_timer
);
1326 ahc_platform_alloc(struct ahc_softc
*ahc
, void *platform_arg
)
1329 ahc
->platform_data
=
1330 malloc(sizeof(struct ahc_platform_data
), M_DEVBUF
, M_NOWAIT
);
1331 if (ahc
->platform_data
== NULL
)
1333 memset(ahc
->platform_data
, 0, sizeof(struct ahc_platform_data
));
1334 TAILQ_INIT(&ahc
->platform_data
->completeq
);
1335 ahc
->platform_data
->irq
= AHC_LINUX_NOIRQ
;
1337 init_timer(&ahc
->platform_data
->completeq_timer
);
1338 ahc
->platform_data
->completeq_timer
.data
= (u_long
)ahc
;
1339 ahc
->platform_data
->completeq_timer
.function
=
1340 (ahc_linux_callback_t
*)ahc_linux_thread_run_complete_queue
;
1341 init_MUTEX_LOCKED(&ahc
->platform_data
->eh_sem
);
1342 ahc
->seltime
= (aic7xxx_seltime
& 0x3) << 4;
1343 ahc
->seltime_b
= (aic7xxx_seltime
& 0x3) << 4;
1344 if (aic7xxx_pci_parity
== 0)
1345 ahc
->flags
|= AHC_DISABLE_PCI_PERR
;
1351 ahc_platform_free(struct ahc_softc
*ahc
)
1353 struct ahc_linux_target
*targ
;
1354 struct ahc_linux_device
*dev
;
1357 if (ahc
->platform_data
!= NULL
) {
1358 del_timer_sync(&ahc
->platform_data
->completeq_timer
);
1359 if (ahc
->platform_data
->host
!= NULL
) {
1360 scsi_remove_host(ahc
->platform_data
->host
);
1361 scsi_host_put(ahc
->platform_data
->host
);
1364 /* destroy all of the device and target objects */
1365 for (i
= 0; i
< AHC_NUM_TARGETS
; i
++) {
1366 targ
= ahc
->platform_data
->targets
[i
];
1368 /* Keep target around through the loop. */
1370 for (j
= 0; j
< AHC_NUM_LUNS
; j
++) {
1372 if (targ
->devices
[j
] == NULL
)
1374 dev
= targ
->devices
[j
];
1375 ahc_linux_free_device(ahc
, dev
);
1378 * Forcibly free the target now that
1379 * all devices are gone.
1381 ahc_linux_free_target(ahc
, targ
);
1385 if (ahc
->platform_data
->irq
!= AHC_LINUX_NOIRQ
)
1386 free_irq(ahc
->platform_data
->irq
, ahc
);
1387 if (ahc
->tag
== BUS_SPACE_PIO
1388 && ahc
->bsh
.ioport
!= 0)
1389 release_region(ahc
->bsh
.ioport
, 256);
1390 if (ahc
->tag
== BUS_SPACE_MEMIO
1391 && ahc
->bsh
.maddr
!= NULL
) {
1392 iounmap(ahc
->bsh
.maddr
);
1393 release_mem_region(ahc
->platform_data
->mem_busaddr
,
1397 free(ahc
->platform_data
, M_DEVBUF
);
1402 ahc_platform_freeze_devq(struct ahc_softc
*ahc
, struct scb
*scb
)
1404 ahc_platform_abort_scbs(ahc
, SCB_GET_TARGET(ahc
, scb
),
1405 SCB_GET_CHANNEL(ahc
, scb
),
1406 SCB_GET_LUN(scb
), SCB_LIST_NULL
,
1407 ROLE_UNKNOWN
, CAM_REQUEUE_REQ
);
1411 ahc_platform_set_tags(struct ahc_softc
*ahc
, struct ahc_devinfo
*devinfo
,
1414 struct ahc_linux_device
*dev
;
1418 dev
= ahc_linux_get_device(ahc
, devinfo
->channel
- 'A',
1420 devinfo
->lun
, /*alloc*/FALSE
);
1423 was_queuing
= dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
);
1426 case AHC_QUEUE_NONE
:
1429 case AHC_QUEUE_BASIC
:
1430 now_queuing
= AHC_DEV_Q_BASIC
;
1432 case AHC_QUEUE_TAGGED
:
1433 now_queuing
= AHC_DEV_Q_TAGGED
;
1436 if ((dev
->flags
& AHC_DEV_FREEZE_TIL_EMPTY
) == 0
1437 && (was_queuing
!= now_queuing
)
1438 && (dev
->active
!= 0)) {
1439 dev
->flags
|= AHC_DEV_FREEZE_TIL_EMPTY
;
1443 dev
->flags
&= ~(AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
|AHC_DEV_PERIODIC_OTAG
);
1447 usertags
= ahc_linux_user_tagdepth(ahc
, devinfo
);
1450 * Start out agressively and allow our
1451 * dynamic queue depth algorithm to take
1454 dev
->maxtags
= usertags
;
1455 dev
->openings
= dev
->maxtags
- dev
->active
;
1457 if (dev
->maxtags
== 0) {
1459 * Queueing is disabled by the user.
1462 } else if (alg
== AHC_QUEUE_TAGGED
) {
1463 dev
->flags
|= AHC_DEV_Q_TAGGED
;
1464 if (aic7xxx_periodic_otag
!= 0)
1465 dev
->flags
|= AHC_DEV_PERIODIC_OTAG
;
1467 dev
->flags
|= AHC_DEV_Q_BASIC
;
1469 /* We can only have one opening. */
1471 dev
->openings
= 1 - dev
->active
;
1473 if (dev
->scsi_device
!= NULL
) {
1474 switch ((dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
))) {
1475 case AHC_DEV_Q_BASIC
:
1476 scsi_adjust_queue_depth(dev
->scsi_device
,
1478 dev
->openings
+ dev
->active
);
1480 case AHC_DEV_Q_TAGGED
:
1481 scsi_adjust_queue_depth(dev
->scsi_device
,
1483 dev
->openings
+ dev
->active
);
1487 * We allow the OS to queue 2 untagged transactions to
1488 * us at any time even though we can only execute them
1489 * serially on the controller/device. This should
1490 * remove some latency.
1492 scsi_adjust_queue_depth(dev
->scsi_device
,
1501 ahc_platform_abort_scbs(struct ahc_softc
*ahc
, int target
, char channel
,
1502 int lun
, u_int tag
, role_t role
, uint32_t status
)
1508 ahc_linux_thread_run_complete_queue(struct ahc_softc
*ahc
)
1512 ahc_lock(ahc
, &flags
);
1513 del_timer(&ahc
->platform_data
->completeq_timer
);
1514 ahc
->platform_data
->flags
&= ~AHC_RUN_CMPLT_Q_TIMER
;
1515 ahc_linux_run_complete_queue(ahc
);
1516 ahc_unlock(ahc
, &flags
);
1520 ahc_linux_user_tagdepth(struct ahc_softc
*ahc
, struct ahc_devinfo
*devinfo
)
1522 static int warned_user
;
1526 if ((ahc
->user_discenable
& devinfo
->target_mask
) != 0) {
1527 if (ahc
->unit
>= NUM_ELEMENTS(aic7xxx_tag_info
)) {
1528 if (warned_user
== 0) {
1531 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1532 "aic7xxx: for installed controllers. Using defaults\n"
1533 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1534 "aic7xxx: the aic7xxx_osm..c source file.\n");
1537 tags
= AHC_MAX_QUEUE
;
1539 adapter_tag_info_t
*tag_info
;
1541 tag_info
= &aic7xxx_tag_info
[ahc
->unit
];
1542 tags
= tag_info
->tag_commands
[devinfo
->target_offset
];
1543 if (tags
> AHC_MAX_QUEUE
)
1544 tags
= AHC_MAX_QUEUE
;
1551 * Determines the queue depth for a given device.
1554 ahc_linux_device_queue_depth(struct ahc_softc
*ahc
,
1555 struct ahc_linux_device
*dev
)
1557 struct ahc_devinfo devinfo
;
1560 ahc_compile_devinfo(&devinfo
,
1561 dev
->target
->channel
== 0
1562 ? ahc
->our_id
: ahc
->our_id_b
,
1563 dev
->target
->target
, dev
->lun
,
1564 dev
->target
->channel
== 0 ? 'A' : 'B',
1566 tags
= ahc_linux_user_tagdepth(ahc
, &devinfo
);
1568 && dev
->scsi_device
!= NULL
1569 && dev
->scsi_device
->tagged_supported
!= 0) {
1571 ahc_set_tags(ahc
, &devinfo
, AHC_QUEUE_TAGGED
);
1572 ahc_print_devinfo(ahc
, &devinfo
);
1573 printf("Tagged Queuing enabled. Depth %d\n", tags
);
1575 ahc_set_tags(ahc
, &devinfo
, AHC_QUEUE_NONE
);
1580 ahc_linux_run_command(struct ahc_softc
*ahc
, struct ahc_linux_device
*dev
,
1581 struct scsi_cmnd
*cmd
)
1584 struct hardware_scb
*hscb
;
1585 struct ahc_initiator_tinfo
*tinfo
;
1586 struct ahc_tmode_tstate
*tstate
;
1588 struct scb_tailq
*untagged_q
= NULL
;
1591 * Schedule us to run later. The only reason we are not
1592 * running is because the whole controller Q is frozen.
1594 if (ahc
->platform_data
->qfrozen
!= 0)
1595 return SCSI_MLQUEUE_HOST_BUSY
;
1598 * We only allow one untagged transaction
1599 * per target in the initiator role unless
1600 * we are storing a full busy target *lun*
1601 * table in SCB space.
1603 if (!blk_rq_tagged(cmd
->request
)
1604 && (ahc
->features
& AHC_SCB_BTT
) == 0) {
1607 target_offset
= cmd
->device
->id
+ cmd
->device
->channel
* 8;
1608 untagged_q
= &(ahc
->untagged_queues
[target_offset
]);
1609 if (!TAILQ_EMPTY(untagged_q
))
1610 /* if we're already executing an untagged command
1611 * we're busy to another */
1612 return SCSI_MLQUEUE_DEVICE_BUSY
;
1616 * Get an scb to use.
1618 if ((scb
= ahc_get_scb(ahc
)) == NULL
) {
1619 ahc
->flags
|= AHC_RESOURCE_SHORTAGE
;
1620 return SCSI_MLQUEUE_HOST_BUSY
;
1624 scb
->platform_data
->dev
= dev
;
1626 cmd
->host_scribble
= (char *)scb
;
1629 * Fill out basics of the HSCB.
1632 hscb
->scsiid
= BUILD_SCSIID(ahc
, cmd
);
1633 hscb
->lun
= cmd
->device
->lun
;
1634 mask
= SCB_GET_TARGET_MASK(ahc
, scb
);
1635 tinfo
= ahc_fetch_transinfo(ahc
, SCB_GET_CHANNEL(ahc
, scb
),
1636 SCB_GET_OUR_ID(scb
),
1637 SCB_GET_TARGET(ahc
, scb
), &tstate
);
1638 hscb
->scsirate
= tinfo
->scsirate
;
1639 hscb
->scsioffset
= tinfo
->curr
.offset
;
1640 if ((tstate
->ultraenb
& mask
) != 0)
1641 hscb
->control
|= ULTRAENB
;
1643 if ((ahc
->user_discenable
& mask
) != 0)
1644 hscb
->control
|= DISCENB
;
1646 if ((tstate
->auto_negotiate
& mask
) != 0) {
1647 scb
->flags
|= SCB_AUTO_NEGOTIATE
;
1648 scb
->hscb
->control
|= MK_MESSAGE
;
1651 if ((dev
->flags
& (AHC_DEV_Q_TAGGED
|AHC_DEV_Q_BASIC
)) != 0) {
1653 uint8_t tag_msgs
[2];
1655 msg_bytes
= scsi_populate_tag_msg(cmd
, tag_msgs
);
1656 if (msg_bytes
&& tag_msgs
[0] != MSG_SIMPLE_TASK
) {
1657 hscb
->control
|= tag_msgs
[0];
1658 if (tag_msgs
[0] == MSG_ORDERED_TASK
)
1659 dev
->commands_since_idle_or_otag
= 0;
1660 } else if (dev
->commands_since_idle_or_otag
== AHC_OTAG_THRESH
1661 && (dev
->flags
& AHC_DEV_Q_TAGGED
) != 0) {
1662 hscb
->control
|= MSG_ORDERED_TASK
;
1663 dev
->commands_since_idle_or_otag
= 0;
1665 hscb
->control
|= MSG_SIMPLE_TASK
;
1669 hscb
->cdb_len
= cmd
->cmd_len
;
1670 if (hscb
->cdb_len
<= 12) {
1671 memcpy(hscb
->shared_data
.cdb
, cmd
->cmnd
, hscb
->cdb_len
);
1673 memcpy(hscb
->cdb32
, cmd
->cmnd
, hscb
->cdb_len
);
1674 scb
->flags
|= SCB_CDB32_PTR
;
1677 scb
->platform_data
->xfer_len
= 0;
1678 ahc_set_residual(scb
, 0);
1679 ahc_set_sense_residual(scb
, 0);
1681 if (cmd
->use_sg
!= 0) {
1682 struct ahc_dma_seg
*sg
;
1683 struct scatterlist
*cur_seg
;
1684 struct scatterlist
*end_seg
;
1687 cur_seg
= (struct scatterlist
*)cmd
->request_buffer
;
1688 nseg
= pci_map_sg(ahc
->dev_softc
, cur_seg
, cmd
->use_sg
,
1689 cmd
->sc_data_direction
);
1690 end_seg
= cur_seg
+ nseg
;
1691 /* Copy the segments into the SG list. */
1694 * The sg_count may be larger than nseg if
1695 * a transfer crosses a 32bit page.
1697 while (cur_seg
< end_seg
) {
1702 addr
= sg_dma_address(cur_seg
);
1703 len
= sg_dma_len(cur_seg
);
1704 consumed
= ahc_linux_map_seg(ahc
, scb
,
1707 scb
->sg_count
+= consumed
;
1711 sg
->len
|= ahc_htole32(AHC_DMA_LAST_SEG
);
1714 * Reset the sg list pointer.
1717 ahc_htole32(scb
->sg_list_phys
| SG_FULL_RESID
);
1720 * Copy the first SG into the "current"
1721 * data pointer area.
1723 scb
->hscb
->dataptr
= scb
->sg_list
->addr
;
1724 scb
->hscb
->datacnt
= scb
->sg_list
->len
;
1725 } else if (cmd
->request_bufflen
!= 0) {
1726 struct ahc_dma_seg
*sg
;
1730 addr
= pci_map_single(ahc
->dev_softc
,
1731 cmd
->request_buffer
,
1732 cmd
->request_bufflen
,
1733 cmd
->sc_data_direction
);
1734 scb
->platform_data
->buf_busaddr
= addr
;
1735 scb
->sg_count
= ahc_linux_map_seg(ahc
, scb
,
1737 cmd
->request_bufflen
);
1738 sg
->len
|= ahc_htole32(AHC_DMA_LAST_SEG
);
1741 * Reset the sg list pointer.
1744 ahc_htole32(scb
->sg_list_phys
| SG_FULL_RESID
);
1747 * Copy the first SG into the "current"
1748 * data pointer area.
1750 scb
->hscb
->dataptr
= sg
->addr
;
1751 scb
->hscb
->datacnt
= sg
->len
;
1753 scb
->hscb
->sgptr
= ahc_htole32(SG_LIST_NULL
);
1754 scb
->hscb
->dataptr
= 0;
1755 scb
->hscb
->datacnt
= 0;
1759 LIST_INSERT_HEAD(&ahc
->pending_scbs
, scb
, pending_links
);
1762 dev
->commands_issued
++;
1763 if ((dev
->flags
& AHC_DEV_PERIODIC_OTAG
) != 0)
1764 dev
->commands_since_idle_or_otag
++;
1766 scb
->flags
|= SCB_ACTIVE
;
1768 TAILQ_INSERT_TAIL(untagged_q
, scb
, links
.tqe
);
1769 scb
->flags
|= SCB_UNTAGGEDQ
;
1771 ahc_queue_scb(ahc
, scb
);
1776 * SCSI controller interrupt handler.
1779 ahc_linux_isr(int irq
, void *dev_id
, struct pt_regs
* regs
)
1781 struct ahc_softc
*ahc
;
1785 ahc
= (struct ahc_softc
*) dev_id
;
1786 ahc_lock(ahc
, &flags
);
1787 ours
= ahc_intr(ahc
);
1788 ahc_linux_run_complete_queue(ahc
);
1789 ahc_unlock(ahc
, &flags
);
1790 return IRQ_RETVAL(ours
);
1794 ahc_platform_flushwork(struct ahc_softc
*ahc
)
1797 while (ahc_linux_run_complete_queue(ahc
) != NULL
)
1801 static struct ahc_linux_target
*
1802 ahc_linux_alloc_target(struct ahc_softc
*ahc
, u_int channel
, u_int target
)
1804 struct ahc_linux_target
*targ
;
1805 u_int target_offset
;
1807 target_offset
= target
;
1811 targ
= malloc(sizeof(*targ
), M_DEVBUG
, M_NOWAIT
);
1814 memset(targ
, 0, sizeof(*targ
));
1815 targ
->channel
= channel
;
1816 targ
->target
= target
;
1818 ahc
->platform_data
->targets
[target_offset
] = targ
;
1823 ahc_linux_free_target(struct ahc_softc
*ahc
, struct ahc_linux_target
*targ
)
1825 struct ahc_devinfo devinfo
;
1826 struct ahc_initiator_tinfo
*tinfo
;
1827 struct ahc_tmode_tstate
*tstate
;
1829 u_int target_offset
;
1833 * Force a negotiation to async/narrow on any
1834 * future command to this device unless a bus
1835 * reset occurs between now and that command.
1837 channel
= 'A' + targ
->channel
;
1838 our_id
= ahc
->our_id
;
1839 target_offset
= targ
->target
;
1840 if (targ
->channel
!= 0) {
1842 our_id
= ahc
->our_id_b
;
1844 tinfo
= ahc_fetch_transinfo(ahc
, channel
, our_id
,
1845 targ
->target
, &tstate
);
1846 ahc_compile_devinfo(&devinfo
, our_id
, targ
->target
, CAM_LUN_WILDCARD
,
1847 channel
, ROLE_INITIATOR
);
1848 ahc_set_syncrate(ahc
, &devinfo
, NULL
, 0, 0, 0,
1849 AHC_TRANS_GOAL
, /*paused*/FALSE
);
1850 ahc_set_width(ahc
, &devinfo
, MSG_EXT_WDTR_BUS_8_BIT
,
1851 AHC_TRANS_GOAL
, /*paused*/FALSE
);
1852 ahc_update_neg_request(ahc
, &devinfo
, tstate
, tinfo
, AHC_NEG_ALWAYS
);
1853 ahc
->platform_data
->targets
[target_offset
] = NULL
;
1854 free(targ
, M_DEVBUF
);
1857 static struct ahc_linux_device
*
1858 ahc_linux_alloc_device(struct ahc_softc
*ahc
,
1859 struct ahc_linux_target
*targ
, u_int lun
)
1861 struct ahc_linux_device
*dev
;
1863 dev
= malloc(sizeof(*dev
), M_DEVBUG
, M_NOWAIT
);
1866 memset(dev
, 0, sizeof(*dev
));
1867 init_timer(&dev
->timer
);
1868 dev
->flags
= AHC_DEV_UNCONFIGURED
;
1873 * We start out life using untagged
1874 * transactions of which we allow one.
1879 * Set maxtags to 0. This will be changed if we
1880 * later determine that we are dealing with
1881 * a tagged queuing capable device.
1886 targ
->devices
[lun
] = dev
;
1891 __ahc_linux_free_device(struct ahc_softc
*ahc
, struct ahc_linux_device
*dev
)
1893 struct ahc_linux_target
*targ
;
1896 targ
->devices
[dev
->lun
] = NULL
;
1897 free(dev
, M_DEVBUF
);
1899 if (targ
->refcount
== 0)
1900 ahc_linux_free_target(ahc
, targ
);
1904 ahc_linux_free_device(struct ahc_softc
*ahc
, struct ahc_linux_device
*dev
)
1906 del_timer_sync(&dev
->timer
);
1907 __ahc_linux_free_device(ahc
, dev
);
1911 ahc_send_async(struct ahc_softc
*ahc
, char channel
,
1912 u_int target
, u_int lun
, ac_code code
, void *arg
)
1915 case AC_TRANSFER_NEG
:
1918 struct ahc_linux_target
*targ
;
1919 struct info_str info
;
1920 struct ahc_initiator_tinfo
*tinfo
;
1921 struct ahc_tmode_tstate
*tstate
;
1925 info
.length
= sizeof(buf
);
1928 tinfo
= ahc_fetch_transinfo(ahc
, channel
,
1929 channel
== 'A' ? ahc
->our_id
1934 * Don't bother reporting results while
1935 * negotiations are still pending.
1937 if (tinfo
->curr
.period
!= tinfo
->goal
.period
1938 || tinfo
->curr
.width
!= tinfo
->goal
.width
1939 || tinfo
->curr
.offset
!= tinfo
->goal
.offset
1940 || tinfo
->curr
.ppr_options
!= tinfo
->goal
.ppr_options
)
1941 if (bootverbose
== 0)
1945 * Don't bother reporting results that
1946 * are identical to those last reported.
1948 target_offset
= target
;
1951 targ
= ahc
->platform_data
->targets
[target_offset
];
1954 if (tinfo
->curr
.period
== targ
->last_tinfo
.period
1955 && tinfo
->curr
.width
== targ
->last_tinfo
.width
1956 && tinfo
->curr
.offset
== targ
->last_tinfo
.offset
1957 && tinfo
->curr
.ppr_options
== targ
->last_tinfo
.ppr_options
)
1958 if (bootverbose
== 0)
1961 targ
->last_tinfo
.period
= tinfo
->curr
.period
;
1962 targ
->last_tinfo
.width
= tinfo
->curr
.width
;
1963 targ
->last_tinfo
.offset
= tinfo
->curr
.offset
;
1964 targ
->last_tinfo
.ppr_options
= tinfo
->curr
.ppr_options
;
1966 printf("(%s:%c:", ahc_name(ahc
), channel
);
1967 if (target
== CAM_TARGET_WILDCARD
)
1970 printf("%d): ", target
);
1971 ahc_format_transinfo(&info
, &tinfo
->curr
);
1972 if (info
.pos
< info
.length
)
1973 *info
.buffer
= '\0';
1975 buf
[info
.length
- 1] = '\0';
1981 WARN_ON(lun
!= CAM_LUN_WILDCARD
);
1982 scsi_report_device_reset(ahc
->platform_data
->host
,
1983 channel
- 'A', target
);
1987 if (ahc
->platform_data
->host
!= NULL
) {
1988 scsi_report_bus_reset(ahc
->platform_data
->host
,
1993 panic("ahc_send_async: Unexpected async event");
1998 * Calls the higher level scsi done function and frees the scb.
2001 ahc_done(struct ahc_softc
*ahc
, struct scb
*scb
)
2003 struct scsi_cmnd
*cmd
;
2004 struct ahc_linux_device
*dev
;
2006 LIST_REMOVE(scb
, pending_links
);
2007 if ((scb
->flags
& SCB_UNTAGGEDQ
) != 0) {
2008 struct scb_tailq
*untagged_q
;
2011 target_offset
= SCB_GET_TARGET_OFFSET(ahc
, scb
);
2012 untagged_q
= &(ahc
->untagged_queues
[target_offset
]);
2013 TAILQ_REMOVE(untagged_q
, scb
, links
.tqe
);
2014 BUG_ON(!TAILQ_EMPTY(untagged_q
));
2017 if ((scb
->flags
& SCB_ACTIVE
) == 0) {
2018 printf("SCB %d done'd twice\n", scb
->hscb
->tag
);
2019 ahc_dump_card_state(ahc
);
2020 panic("Stopping for safety");
2023 dev
= scb
->platform_data
->dev
;
2026 if ((cmd
->result
& (CAM_DEV_QFRZN
<< 16)) != 0) {
2027 cmd
->result
&= ~(CAM_DEV_QFRZN
<< 16);
2030 ahc_linux_unmap_scb(ahc
, scb
);
2033 * Guard against stale sense data.
2034 * The Linux mid-layer assumes that sense
2035 * was retrieved anytime the first byte of
2036 * the sense buffer looks "sane".
2038 cmd
->sense_buffer
[0] = 0;
2039 if (ahc_get_transaction_status(scb
) == CAM_REQ_INPROG
) {
2040 uint32_t amount_xferred
;
2043 ahc_get_transfer_length(scb
) - ahc_get_residual(scb
);
2044 if ((scb
->flags
& SCB_TRANSMISSION_ERROR
) != 0) {
2046 if ((ahc_debug
& AHC_SHOW_MISC
) != 0) {
2047 ahc_print_path(ahc
, scb
);
2048 printf("Set CAM_UNCOR_PARITY\n");
2051 ahc_set_transaction_status(scb
, CAM_UNCOR_PARITY
);
2052 #ifdef AHC_REPORT_UNDERFLOWS
2054 * This code is disabled by default as some
2055 * clients of the SCSI system do not properly
2056 * initialize the underflow parameter. This
2057 * results in spurious termination of commands
2058 * that complete as expected (e.g. underflow is
2059 * allowed as command can return variable amounts
2062 } else if (amount_xferred
< scb
->io_ctx
->underflow
) {
2065 ahc_print_path(ahc
, scb
);
2067 for (i
= 0; i
< scb
->io_ctx
->cmd_len
; i
++)
2068 printf(" 0x%x", scb
->io_ctx
->cmnd
[i
]);
2070 ahc_print_path(ahc
, scb
);
2071 printf("Saw underflow (%ld of %ld bytes). "
2072 "Treated as error\n",
2073 ahc_get_residual(scb
),
2074 ahc_get_transfer_length(scb
));
2075 ahc_set_transaction_status(scb
, CAM_DATA_RUN_ERR
);
2078 ahc_set_transaction_status(scb
, CAM_REQ_CMP
);
2080 } else if (ahc_get_transaction_status(scb
) == CAM_SCSI_STATUS_ERROR
) {
2081 ahc_linux_handle_scsi_status(ahc
, dev
, scb
);
2082 } else if (ahc_get_transaction_status(scb
) == CAM_SEL_TIMEOUT
) {
2083 dev
->flags
|= AHC_DEV_UNCONFIGURED
;
2086 if (dev
->openings
== 1
2087 && ahc_get_transaction_status(scb
) == CAM_REQ_CMP
2088 && ahc_get_scsi_status(scb
) != SCSI_STATUS_QUEUE_FULL
)
2089 dev
->tag_success_count
++;
2091 * Some devices deal with temporary internal resource
2092 * shortages by returning queue full. When the queue
2093 * full occurrs, we throttle back. Slowly try to get
2094 * back to our previous queue depth.
2096 if ((dev
->openings
+ dev
->active
) < dev
->maxtags
2097 && dev
->tag_success_count
> AHC_TAG_SUCCESS_INTERVAL
) {
2098 dev
->tag_success_count
= 0;
2102 if (dev
->active
== 0)
2103 dev
->commands_since_idle_or_otag
= 0;
2105 if ((dev
->flags
& AHC_DEV_UNCONFIGURED
) != 0
2107 && (dev
->flags
& AHC_DEV_TIMER_ACTIVE
) == 0)
2108 ahc_linux_free_device(ahc
, dev
);
2110 if ((scb
->flags
& SCB_RECOVERY_SCB
) != 0) {
2111 printf("Recovery SCB completes\n");
2112 if (ahc_get_transaction_status(scb
) == CAM_BDR_SENT
2113 || ahc_get_transaction_status(scb
) == CAM_REQ_ABORTED
)
2114 ahc_set_transaction_status(scb
, CAM_CMD_TIMEOUT
);
2115 if ((ahc
->platform_data
->flags
& AHC_UP_EH_SEMAPHORE
) != 0) {
2116 ahc
->platform_data
->flags
&= ~AHC_UP_EH_SEMAPHORE
;
2117 up(&ahc
->platform_data
->eh_sem
);
2121 ahc_free_scb(ahc
, scb
);
2122 ahc_linux_queue_cmd_complete(ahc
, cmd
);
2126 ahc_linux_handle_scsi_status(struct ahc_softc
*ahc
,
2127 struct ahc_linux_device
*dev
, struct scb
*scb
)
2129 struct ahc_devinfo devinfo
;
2131 ahc_compile_devinfo(&devinfo
,
2133 dev
->target
->target
, dev
->lun
,
2134 dev
->target
->channel
== 0 ? 'A' : 'B',
2138 * We don't currently trust the mid-layer to
2139 * properly deal with queue full or busy. So,
2140 * when one occurs, we tell the mid-layer to
2141 * unconditionally requeue the command to us
2142 * so that we can retry it ourselves. We also
2143 * implement our own throttling mechanism so
2144 * we don't clobber the device with too many
2147 switch (ahc_get_scsi_status(scb
)) {
2150 case SCSI_STATUS_CHECK_COND
:
2151 case SCSI_STATUS_CMD_TERMINATED
:
2153 struct scsi_cmnd
*cmd
;
2156 * Copy sense information to the OS's cmd
2157 * structure if it is available.
2160 if (scb
->flags
& SCB_SENSE
) {
2163 sense_size
= MIN(sizeof(struct scsi_sense_data
)
2164 - ahc_get_sense_residual(scb
),
2165 sizeof(cmd
->sense_buffer
));
2166 memcpy(cmd
->sense_buffer
,
2167 ahc_get_sense_buf(ahc
, scb
), sense_size
);
2168 if (sense_size
< sizeof(cmd
->sense_buffer
))
2169 memset(&cmd
->sense_buffer
[sense_size
], 0,
2170 sizeof(cmd
->sense_buffer
) - sense_size
);
2171 cmd
->result
|= (DRIVER_SENSE
<< 24);
2173 if (ahc_debug
& AHC_SHOW_SENSE
) {
2176 printf("Copied %d bytes of sense data:",
2178 for (i
= 0; i
< sense_size
; i
++) {
2181 printf("0x%x ", cmd
->sense_buffer
[i
]);
2189 case SCSI_STATUS_QUEUE_FULL
:
2192 * By the time the core driver has returned this
2193 * command, all other commands that were queued
2194 * to us but not the device have been returned.
2195 * This ensures that dev->active is equal to
2196 * the number of commands actually queued to
2199 dev
->tag_success_count
= 0;
2200 if (dev
->active
!= 0) {
2202 * Drop our opening count to the number
2203 * of commands currently outstanding.
2207 ahc_print_path(ahc, scb);
2208 printf("Dropping tag count to %d\n", dev->active);
2210 if (dev
->active
== dev
->tags_on_last_queuefull
) {
2212 dev
->last_queuefull_same_count
++;
2214 * If we repeatedly see a queue full
2215 * at the same queue depth, this
2216 * device has a fixed number of tag
2217 * slots. Lock in this tag depth
2218 * so we stop seeing queue fulls from
2221 if (dev
->last_queuefull_same_count
2222 == AHC_LOCK_TAGS_COUNT
) {
2223 dev
->maxtags
= dev
->active
;
2224 ahc_print_path(ahc
, scb
);
2225 printf("Locking max tag count at %d\n",
2229 dev
->tags_on_last_queuefull
= dev
->active
;
2230 dev
->last_queuefull_same_count
= 0;
2232 ahc_set_transaction_status(scb
, CAM_REQUEUE_REQ
);
2233 ahc_set_scsi_status(scb
, SCSI_STATUS_OK
);
2234 ahc_platform_set_tags(ahc
, &devinfo
,
2235 (dev
->flags
& AHC_DEV_Q_BASIC
)
2236 ? AHC_QUEUE_BASIC
: AHC_QUEUE_TAGGED
);
2240 * Drop down to a single opening, and treat this
2241 * as if the target returned BUSY SCSI status.
2244 ahc_set_scsi_status(scb
, SCSI_STATUS_BUSY
);
2245 ahc_platform_set_tags(ahc
, &devinfo
,
2246 (dev
->flags
& AHC_DEV_Q_BASIC
)
2247 ? AHC_QUEUE_BASIC
: AHC_QUEUE_TAGGED
);
2250 case SCSI_STATUS_BUSY
:
2253 * Set a short timer to defer sending commands for
2254 * a bit since Linux will not delay in this case.
2256 if ((dev
->flags
& AHC_DEV_TIMER_ACTIVE
) != 0) {
2257 printf("%s:%c:%d: Device Timer still active during "
2258 "busy processing\n", ahc_name(ahc
),
2259 dev
->target
->channel
, dev
->target
->target
);
2262 dev
->flags
|= AHC_DEV_TIMER_ACTIVE
;
2264 init_timer(&dev
->timer
);
2265 dev
->timer
.data
= (u_long
)dev
;
2266 dev
->timer
.expires
= jiffies
+ (HZ
/2);
2267 dev
->timer
.function
= ahc_linux_dev_timed_unfreeze
;
2268 add_timer(&dev
->timer
);
2275 ahc_linux_queue_cmd_complete(struct ahc_softc
*ahc
, struct scsi_cmnd
*cmd
)
2278 * Typically, the complete queue has very few entries
2279 * queued to it before the queue is emptied by
2280 * ahc_linux_run_complete_queue, so sorting the entries
2281 * by generation number should be inexpensive.
2282 * We perform the sort so that commands that complete
2283 * with an error are retuned in the order origionally
2284 * queued to the controller so that any subsequent retries
2285 * are performed in order. The underlying ahc routines do
2286 * not guarantee the order that aborted commands will be
2289 struct ahc_completeq
*completeq
;
2290 struct ahc_cmd
*list_cmd
;
2291 struct ahc_cmd
*acmd
;
2294 * Map CAM error codes into Linux Error codes. We
2295 * avoid the conversion so that the DV code has the
2296 * full error information available when making
2297 * state change decisions.
2302 switch (ahc_cmd_get_transaction_status(cmd
)) {
2303 case CAM_REQ_INPROG
:
2305 case CAM_SCSI_STATUS_ERROR
:
2306 new_status
= DID_OK
;
2308 case CAM_REQ_ABORTED
:
2309 new_status
= DID_ABORT
;
2312 new_status
= DID_BUS_BUSY
;
2314 case CAM_REQ_INVALID
:
2315 case CAM_PATH_INVALID
:
2316 new_status
= DID_BAD_TARGET
;
2318 case CAM_SEL_TIMEOUT
:
2319 new_status
= DID_NO_CONNECT
;
2321 case CAM_SCSI_BUS_RESET
:
2323 new_status
= DID_RESET
;
2325 case CAM_UNCOR_PARITY
:
2326 new_status
= DID_PARITY
;
2328 case CAM_CMD_TIMEOUT
:
2329 new_status
= DID_TIME_OUT
;
2332 case CAM_REQ_CMP_ERR
:
2333 case CAM_AUTOSENSE_FAIL
:
2335 case CAM_DATA_RUN_ERR
:
2336 case CAM_UNEXP_BUSFREE
:
2337 case CAM_SEQUENCE_FAIL
:
2338 case CAM_CCB_LEN_ERR
:
2339 case CAM_PROVIDE_FAIL
:
2340 case CAM_REQ_TERMIO
:
2341 case CAM_UNREC_HBA_ERROR
:
2342 case CAM_REQ_TOO_BIG
:
2343 new_status
= DID_ERROR
;
2345 case CAM_REQUEUE_REQ
:
2347 * If we want the request requeued, make sure there
2348 * are sufficent retries. In the old scsi error code,
2349 * we used to be able to specify a result code that
2350 * bypassed the retry count. Now we must use this
2351 * hack. We also "fake" a check condition with
2352 * a sense code of ABORTED COMMAND. This seems to
2353 * evoke a retry even if this command is being sent
2354 * via the eh thread. Ick! Ick! Ick!
2356 if (cmd
->retries
> 0)
2358 new_status
= DID_OK
;
2359 ahc_cmd_set_scsi_status(cmd
, SCSI_STATUS_CHECK_COND
);
2360 cmd
->result
|= (DRIVER_SENSE
<< 24);
2361 memset(cmd
->sense_buffer
, 0,
2362 sizeof(cmd
->sense_buffer
));
2363 cmd
->sense_buffer
[0] = SSD_ERRCODE_VALID
2364 | SSD_CURRENT_ERROR
;
2365 cmd
->sense_buffer
[2] = SSD_KEY_ABORTED_COMMAND
;
2368 /* We should never get here */
2369 new_status
= DID_ERROR
;
2373 ahc_cmd_set_transaction_status(cmd
, new_status
);
2376 completeq
= &ahc
->platform_data
->completeq
;
2377 list_cmd
= TAILQ_FIRST(completeq
);
2378 acmd
= (struct ahc_cmd
*)cmd
;
2379 while (list_cmd
!= NULL
2380 && acmd_scsi_cmd(list_cmd
).serial_number
2381 < acmd_scsi_cmd(acmd
).serial_number
)
2382 list_cmd
= TAILQ_NEXT(list_cmd
, acmd_links
.tqe
);
2383 if (list_cmd
!= NULL
)
2384 TAILQ_INSERT_BEFORE(list_cmd
, acmd
, acmd_links
.tqe
);
2386 TAILQ_INSERT_TAIL(completeq
, acmd
, acmd_links
.tqe
);
2390 ahc_linux_sem_timeout(u_long arg
)
2392 struct ahc_softc
*ahc
;
2395 ahc
= (struct ahc_softc
*)arg
;
2398 if ((ahc
->platform_data
->flags
& AHC_UP_EH_SEMAPHORE
) != 0) {
2399 ahc
->platform_data
->flags
&= ~AHC_UP_EH_SEMAPHORE
;
2400 up(&ahc
->platform_data
->eh_sem
);
2402 ahc_unlock(ahc
, &s
);
2406 ahc_linux_freeze_simq(struct ahc_softc
*ahc
)
2408 ahc
->platform_data
->qfrozen
++;
2409 if (ahc
->platform_data
->qfrozen
== 1) {
2410 scsi_block_requests(ahc
->platform_data
->host
);
2412 /* XXX What about Twin channels? */
2413 ahc_platform_abort_scbs(ahc
, CAM_TARGET_WILDCARD
, ALL_CHANNELS
,
2414 CAM_LUN_WILDCARD
, SCB_LIST_NULL
,
2415 ROLE_INITIATOR
, CAM_REQUEUE_REQ
);
2420 ahc_linux_release_simq(u_long arg
)
2422 struct ahc_softc
*ahc
;
2426 ahc
= (struct ahc_softc
*)arg
;
2430 if (ahc
->platform_data
->qfrozen
> 0)
2431 ahc
->platform_data
->qfrozen
--;
2432 if (ahc
->platform_data
->qfrozen
== 0)
2434 ahc_unlock(ahc
, &s
);
2436 * There is still a race here. The mid-layer
2437 * should keep its own freeze count and use
2438 * a bottom half handler to run the queues
2439 * so we can unblock with our own lock held.
2442 scsi_unblock_requests(ahc
->platform_data
->host
);
2446 ahc_linux_dev_timed_unfreeze(u_long arg
)
2448 struct ahc_linux_device
*dev
;
2449 struct ahc_softc
*ahc
;
2452 dev
= (struct ahc_linux_device
*)arg
;
2453 ahc
= dev
->target
->ahc
;
2455 dev
->flags
&= ~AHC_DEV_TIMER_ACTIVE
;
2456 if (dev
->qfrozen
> 0)
2458 if (dev
->active
== 0)
2459 __ahc_linux_free_device(ahc
, dev
);
2460 ahc_unlock(ahc
, &s
);
2464 ahc_linux_queue_recovery_cmd(struct scsi_cmnd
*cmd
, scb_flag flag
)
2466 struct ahc_softc
*ahc
;
2467 struct ahc_linux_device
*dev
;
2468 struct scb
*pending_scb
;
2470 u_int active_scb_index
;
2483 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
2485 printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
2486 ahc_name(ahc
), cmd
->device
->channel
,
2487 cmd
->device
->id
, cmd
->device
->lun
,
2488 flag
== SCB_ABORT
? "n ABORT" : " TARGET RESET");
2491 for (cdb_byte
= 0; cdb_byte
< cmd
->cmd_len
; cdb_byte
++)
2492 printf(" 0x%x", cmd
->cmnd
[cdb_byte
]);
2496 * First determine if we currently own this command.
2497 * Start by searching the device queue. If not found
2498 * there, check the pending_scb list. If not found
2499 * at all, and the system wanted us to just abort the
2500 * command, return success.
2502 dev
= ahc_linux_get_device(ahc
, cmd
->device
->channel
, cmd
->device
->id
,
2503 cmd
->device
->lun
, /*alloc*/FALSE
);
2507 * No target device for this command exists,
2508 * so we must not still own the command.
2510 printf("%s:%d:%d:%d: Is not an active device\n",
2511 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
2517 if ((dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
)) == 0
2518 && ahc_search_untagged_queues(ahc
, cmd
, cmd
->device
->id
,
2519 cmd
->device
->channel
+ 'A',
2521 CAM_REQ_ABORTED
, SEARCH_COMPLETE
) != 0) {
2522 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2523 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
2530 * See if we can find a matching cmd in the pending list.
2532 LIST_FOREACH(pending_scb
, &ahc
->pending_scbs
, pending_links
) {
2533 if (pending_scb
->io_ctx
== cmd
)
2537 if (pending_scb
== NULL
&& flag
== SCB_DEVICE_RESET
) {
2539 /* Any SCB for this device will do for a target reset */
2540 LIST_FOREACH(pending_scb
, &ahc
->pending_scbs
, pending_links
) {
2541 if (ahc_match_scb(ahc
, pending_scb
, cmd
->device
->id
,
2542 cmd
->device
->channel
+ 'A',
2544 SCB_LIST_NULL
, ROLE_INITIATOR
) == 0)
2549 if (pending_scb
== NULL
) {
2550 printf("%s:%d:%d:%d: Command not found\n",
2551 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
2556 if ((pending_scb
->flags
& SCB_RECOVERY_SCB
) != 0) {
2558 * We can't queue two recovery actions using the same SCB
2565 * Ensure that the card doesn't do anything
2566 * behind our back and that we didn't "just" miss
2567 * an interrupt that would affect this cmd.
2569 was_paused
= ahc_is_paused(ahc
);
2570 ahc_pause_and_flushwork(ahc
);
2573 if ((pending_scb
->flags
& SCB_ACTIVE
) == 0) {
2574 printf("%s:%d:%d:%d: Command already completed\n",
2575 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
2580 printf("%s: At time of recovery, card was %spaused\n",
2581 ahc_name(ahc
), was_paused
? "" : "not ");
2582 ahc_dump_card_state(ahc
);
2584 disconnected
= TRUE
;
2585 if (flag
== SCB_ABORT
) {
2586 if (ahc_search_qinfifo(ahc
, cmd
->device
->id
,
2587 cmd
->device
->channel
+ 'A',
2589 pending_scb
->hscb
->tag
,
2590 ROLE_INITIATOR
, CAM_REQ_ABORTED
,
2591 SEARCH_COMPLETE
) > 0) {
2592 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2593 ahc_name(ahc
), cmd
->device
->channel
,
2594 cmd
->device
->id
, cmd
->device
->lun
);
2598 } else if (ahc_search_qinfifo(ahc
, cmd
->device
->id
,
2599 cmd
->device
->channel
+ 'A',
2600 cmd
->device
->lun
, pending_scb
->hscb
->tag
,
2601 ROLE_INITIATOR
, /*status*/0,
2602 SEARCH_COUNT
) > 0) {
2603 disconnected
= FALSE
;
2606 if (disconnected
&& (ahc_inb(ahc
, SEQ_FLAGS
) & NOT_IDENTIFIED
) == 0) {
2607 struct scb
*bus_scb
;
2609 bus_scb
= ahc_lookup_scb(ahc
, ahc_inb(ahc
, SCB_TAG
));
2610 if (bus_scb
== pending_scb
)
2611 disconnected
= FALSE
;
2612 else if (flag
!= SCB_ABORT
2613 && ahc_inb(ahc
, SAVED_SCSIID
) == pending_scb
->hscb
->scsiid
2614 && ahc_inb(ahc
, SAVED_LUN
) == SCB_GET_LUN(pending_scb
))
2615 disconnected
= FALSE
;
2619 * At this point, pending_scb is the scb associated with the
2620 * passed in command. That command is currently active on the
2621 * bus, is in the disconnected state, or we're hoping to find
2622 * a command for the same target active on the bus to abuse to
2623 * send a BDR. Queue the appropriate message based on which of
2624 * these states we are in.
2626 last_phase
= ahc_inb(ahc
, LASTPHASE
);
2627 saved_scbptr
= ahc_inb(ahc
, SCBPTR
);
2628 active_scb_index
= ahc_inb(ahc
, SCB_TAG
);
2629 saved_scsiid
= ahc_inb(ahc
, SAVED_SCSIID
);
2630 if (last_phase
!= P_BUSFREE
2631 && (pending_scb
->hscb
->tag
== active_scb_index
2632 || (flag
== SCB_DEVICE_RESET
2633 && SCSIID_TARGET(ahc
, saved_scsiid
) == cmd
->device
->id
))) {
2636 * We're active on the bus, so assert ATN
2637 * and hope that the target responds.
2639 pending_scb
= ahc_lookup_scb(ahc
, active_scb_index
);
2640 pending_scb
->flags
|= SCB_RECOVERY_SCB
|flag
;
2641 ahc_outb(ahc
, MSG_OUT
, HOST_MSG
);
2642 ahc_outb(ahc
, SCSISIGO
, last_phase
|ATNO
);
2643 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2644 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
2647 } else if (disconnected
) {
2650 * Actually re-queue this SCB in an attempt
2651 * to select the device before it reconnects.
2652 * In either case (selection or reselection),
2653 * we will now issue the approprate message
2654 * to the timed-out device.
2656 * Set the MK_MESSAGE control bit indicating
2657 * that we desire to send a message. We
2658 * also set the disconnected flag since
2659 * in the paging case there is no guarantee
2660 * that our SCB control byte matches the
2661 * version on the card. We don't want the
2662 * sequencer to abort the command thinking
2663 * an unsolicited reselection occurred.
2665 pending_scb
->hscb
->control
|= MK_MESSAGE
|DISCONNECTED
;
2666 pending_scb
->flags
|= SCB_RECOVERY_SCB
|flag
;
2669 * Remove any cached copy of this SCB in the
2670 * disconnected list in preparation for the
2671 * queuing of our abort SCB. We use the
2672 * same element in the SCB, SCB_NEXT, for
2673 * both the qinfifo and the disconnected list.
2675 ahc_search_disc_list(ahc
, cmd
->device
->id
,
2676 cmd
->device
->channel
+ 'A',
2677 cmd
->device
->lun
, pending_scb
->hscb
->tag
,
2678 /*stop_on_first*/TRUE
,
2680 /*save_state*/FALSE
);
2683 * In the non-paging case, the sequencer will
2684 * never re-reference the in-core SCB.
2685 * To make sure we are notified during
2686 * reslection, set the MK_MESSAGE flag in
2687 * the card's copy of the SCB.
2689 if ((ahc
->flags
& AHC_PAGESCBS
) == 0) {
2690 ahc_outb(ahc
, SCBPTR
, pending_scb
->hscb
->tag
);
2691 ahc_outb(ahc
, SCB_CONTROL
,
2692 ahc_inb(ahc
, SCB_CONTROL
)|MK_MESSAGE
);
2696 * Clear out any entries in the QINFIFO first
2697 * so we are the next SCB for this target
2700 ahc_search_qinfifo(ahc
, cmd
->device
->id
,
2701 cmd
->device
->channel
+ 'A',
2702 cmd
->device
->lun
, SCB_LIST_NULL
,
2703 ROLE_INITIATOR
, CAM_REQUEUE_REQ
,
2705 ahc_qinfifo_requeue_tail(ahc
, pending_scb
);
2706 ahc_outb(ahc
, SCBPTR
, saved_scbptr
);
2707 ahc_print_path(ahc
, pending_scb
);
2708 printf("Device is disconnected, re-queuing SCB\n");
2711 printf("%s:%d:%d:%d: Unable to deliver message\n",
2712 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
2720 * Our assumption is that if we don't have the command, no
2721 * recovery action was required, so we return success. Again,
2722 * the semantics of the mid-layer recovery engine are not
2723 * well defined, so this may change in time.
2730 struct timer_list timer
;
2733 ahc
->platform_data
->flags
|= AHC_UP_EH_SEMAPHORE
;
2734 spin_unlock_irq(&ahc
->platform_data
->spin_lock
);
2736 timer
.data
= (u_long
)ahc
;
2737 timer
.expires
= jiffies
+ (5 * HZ
);
2738 timer
.function
= ahc_linux_sem_timeout
;
2740 printf("Recovery code sleeping\n");
2741 down(&ahc
->platform_data
->eh_sem
);
2742 printf("Recovery code awake\n");
2743 ret
= del_timer_sync(&timer
);
2745 printf("Timer Expired\n");
2748 spin_lock_irq(&ahc
->platform_data
->spin_lock
);
2750 ahc_linux_run_complete_queue(ahc
);
2755 ahc_platform_dump_card_state(struct ahc_softc
*ahc
)
2759 static void ahc_linux_exit(void);
2761 static void ahc_linux_get_width(struct scsi_target
*starget
)
2763 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2764 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2765 struct ahc_tmode_tstate
*tstate
;
2766 struct ahc_initiator_tinfo
*tinfo
2767 = ahc_fetch_transinfo(ahc
,
2768 starget
->channel
+ 'A',
2769 shost
->this_id
, starget
->id
, &tstate
);
2770 spi_width(starget
) = tinfo
->curr
.width
;
2773 static void ahc_linux_set_width(struct scsi_target
*starget
, int width
)
2775 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2776 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2777 struct ahc_devinfo devinfo
;
2778 unsigned long flags
;
2780 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2781 starget
->channel
+ 'A', ROLE_INITIATOR
);
2782 ahc_lock(ahc
, &flags
);
2783 ahc_set_width(ahc
, &devinfo
, width
, AHC_TRANS_GOAL
, FALSE
);
2784 ahc_unlock(ahc
, &flags
);
2787 static void ahc_linux_get_period(struct scsi_target
*starget
)
2789 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2790 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2791 struct ahc_tmode_tstate
*tstate
;
2792 struct ahc_initiator_tinfo
*tinfo
2793 = ahc_fetch_transinfo(ahc
,
2794 starget
->channel
+ 'A',
2795 shost
->this_id
, starget
->id
, &tstate
);
2796 spi_period(starget
) = tinfo
->curr
.period
;
2799 static void ahc_linux_set_period(struct scsi_target
*starget
, int period
)
2801 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2802 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2803 struct ahc_tmode_tstate
*tstate
;
2804 struct ahc_initiator_tinfo
*tinfo
2805 = ahc_fetch_transinfo(ahc
,
2806 starget
->channel
+ 'A',
2807 shost
->this_id
, starget
->id
, &tstate
);
2808 struct ahc_devinfo devinfo
;
2809 unsigned int ppr_options
= tinfo
->curr
.ppr_options
;
2810 unsigned long flags
;
2811 unsigned long offset
= tinfo
->curr
.offset
;
2812 struct ahc_syncrate
*syncrate
;
2815 offset
= MAX_OFFSET
;
2817 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2818 starget
->channel
+ 'A', ROLE_INITIATOR
);
2820 /* all PPR requests apart from QAS require wide transfers */
2821 if (ppr_options
& ~MSG_EXT_PPR_QAS_REQ
) {
2822 ahc_linux_get_width(starget
);
2823 if (spi_width(starget
) == 0)
2824 ppr_options
&= MSG_EXT_PPR_QAS_REQ
;
2827 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2828 ahc_lock(ahc
, &flags
);
2829 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, offset
,
2830 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2831 ahc_unlock(ahc
, &flags
);
2834 static void ahc_linux_get_offset(struct scsi_target
*starget
)
2836 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2837 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2838 struct ahc_tmode_tstate
*tstate
;
2839 struct ahc_initiator_tinfo
*tinfo
2840 = ahc_fetch_transinfo(ahc
,
2841 starget
->channel
+ 'A',
2842 shost
->this_id
, starget
->id
, &tstate
);
2843 spi_offset(starget
) = tinfo
->curr
.offset
;
2846 static void ahc_linux_set_offset(struct scsi_target
*starget
, int offset
)
2848 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2849 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2850 struct ahc_tmode_tstate
*tstate
;
2851 struct ahc_initiator_tinfo
*tinfo
2852 = ahc_fetch_transinfo(ahc
,
2853 starget
->channel
+ 'A',
2854 shost
->this_id
, starget
->id
, &tstate
);
2855 struct ahc_devinfo devinfo
;
2856 unsigned int ppr_options
= 0;
2857 unsigned int period
= 0;
2858 unsigned long flags
;
2859 struct ahc_syncrate
*syncrate
= NULL
;
2861 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2862 starget
->channel
+ 'A', ROLE_INITIATOR
);
2864 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2865 period
= tinfo
->curr
.period
;
2866 ppr_options
= tinfo
->curr
.ppr_options
;
2868 ahc_lock(ahc
, &flags
);
2869 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, offset
,
2870 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2871 ahc_unlock(ahc
, &flags
);
2874 static void ahc_linux_get_dt(struct scsi_target
*starget
)
2876 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2877 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2878 struct ahc_tmode_tstate
*tstate
;
2879 struct ahc_initiator_tinfo
*tinfo
2880 = ahc_fetch_transinfo(ahc
,
2881 starget
->channel
+ 'A',
2882 shost
->this_id
, starget
->id
, &tstate
);
2883 spi_dt(starget
) = tinfo
->curr
.ppr_options
& MSG_EXT_PPR_DT_REQ
;
2886 static void ahc_linux_set_dt(struct scsi_target
*starget
, int dt
)
2888 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2889 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2890 struct ahc_tmode_tstate
*tstate
;
2891 struct ahc_initiator_tinfo
*tinfo
2892 = ahc_fetch_transinfo(ahc
,
2893 starget
->channel
+ 'A',
2894 shost
->this_id
, starget
->id
, &tstate
);
2895 struct ahc_devinfo devinfo
;
2896 unsigned int ppr_options
= tinfo
->curr
.ppr_options
2897 & ~MSG_EXT_PPR_DT_REQ
;
2898 unsigned int period
= tinfo
->curr
.period
;
2899 unsigned long flags
;
2900 struct ahc_syncrate
*syncrate
;
2902 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2903 starget
->channel
+ 'A', ROLE_INITIATOR
);
2904 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
,AHC_SYNCRATE_DT
);
2905 ahc_lock(ahc
, &flags
);
2906 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, tinfo
->curr
.offset
,
2907 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2908 ahc_unlock(ahc
, &flags
);
2911 static void ahc_linux_get_qas(struct scsi_target
*starget
)
2913 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2914 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2915 struct ahc_tmode_tstate
*tstate
;
2916 struct ahc_initiator_tinfo
*tinfo
2917 = ahc_fetch_transinfo(ahc
,
2918 starget
->channel
+ 'A',
2919 shost
->this_id
, starget
->id
, &tstate
);
2920 spi_dt(starget
) = tinfo
->curr
.ppr_options
& MSG_EXT_PPR_QAS_REQ
;
2923 static void ahc_linux_set_qas(struct scsi_target
*starget
, int qas
)
2925 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2926 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2927 struct ahc_tmode_tstate
*tstate
;
2928 struct ahc_initiator_tinfo
*tinfo
2929 = ahc_fetch_transinfo(ahc
,
2930 starget
->channel
+ 'A',
2931 shost
->this_id
, starget
->id
, &tstate
);
2932 struct ahc_devinfo devinfo
;
2933 unsigned int ppr_options
= tinfo
->curr
.ppr_options
2934 & ~MSG_EXT_PPR_QAS_REQ
;
2935 unsigned int period
= tinfo
->curr
.period
;
2936 unsigned long flags
;
2937 struct ahc_syncrate
*syncrate
;
2940 ppr_options
|= MSG_EXT_PPR_QAS_REQ
;
2942 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2943 starget
->channel
+ 'A', ROLE_INITIATOR
);
2944 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2945 ahc_lock(ahc
, &flags
);
2946 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, tinfo
->curr
.offset
,
2947 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2948 ahc_unlock(ahc
, &flags
);
2951 static void ahc_linux_get_iu(struct scsi_target
*starget
)
2953 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2954 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2955 struct ahc_tmode_tstate
*tstate
;
2956 struct ahc_initiator_tinfo
*tinfo
2957 = ahc_fetch_transinfo(ahc
,
2958 starget
->channel
+ 'A',
2959 shost
->this_id
, starget
->id
, &tstate
);
2960 spi_dt(starget
) = tinfo
->curr
.ppr_options
& MSG_EXT_PPR_IU_REQ
;
2963 static void ahc_linux_set_iu(struct scsi_target
*starget
, int iu
)
2965 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2966 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2967 struct ahc_tmode_tstate
*tstate
;
2968 struct ahc_initiator_tinfo
*tinfo
2969 = ahc_fetch_transinfo(ahc
,
2970 starget
->channel
+ 'A',
2971 shost
->this_id
, starget
->id
, &tstate
);
2972 struct ahc_devinfo devinfo
;
2973 unsigned int ppr_options
= tinfo
->curr
.ppr_options
2974 & ~MSG_EXT_PPR_IU_REQ
;
2975 unsigned int period
= tinfo
->curr
.period
;
2976 unsigned long flags
;
2977 struct ahc_syncrate
*syncrate
;
2980 ppr_options
|= MSG_EXT_PPR_IU_REQ
;
2982 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2983 starget
->channel
+ 'A', ROLE_INITIATOR
);
2984 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2985 ahc_lock(ahc
, &flags
);
2986 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, tinfo
->curr
.offset
,
2987 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2988 ahc_unlock(ahc
, &flags
);
2991 static struct spi_function_template ahc_linux_transport_functions
= {
2992 .get_offset
= ahc_linux_get_offset
,
2993 .set_offset
= ahc_linux_set_offset
,
2995 .get_period
= ahc_linux_get_period
,
2996 .set_period
= ahc_linux_set_period
,
2998 .get_width
= ahc_linux_get_width
,
2999 .set_width
= ahc_linux_set_width
,
3001 .get_dt
= ahc_linux_get_dt
,
3002 .set_dt
= ahc_linux_set_dt
,
3004 .get_iu
= ahc_linux_get_iu
,
3005 .set_iu
= ahc_linux_set_iu
,
3007 .get_qas
= ahc_linux_get_qas
,
3008 .set_qas
= ahc_linux_set_qas
,
3015 ahc_linux_init(void)
3017 ahc_linux_transport_template
= spi_attach_transport(&ahc_linux_transport_functions
);
3018 if (!ahc_linux_transport_template
)
3020 if (ahc_linux_detect(&aic7xxx_driver_template
))
3022 spi_release_transport(ahc_linux_transport_template
);
3028 ahc_linux_exit(void)
3030 ahc_linux_pci_exit();
3031 ahc_linux_eisa_exit();
3032 spi_release_transport(ahc_linux_transport_template
);
3035 module_init(ahc_linux_init
);
3036 module_exit(ahc_linux_exit
);