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,
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(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) {
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)
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);
585 /************************ Host template entry points *************************/
586 static int ahc_linux_detect(Scsi_Host_Template *);
587 static int ahc_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
588 static const char *ahc_linux_info(struct Scsi_Host *);
589 static int ahc_linux_slave_alloc(Scsi_Device *);
590 static int ahc_linux_slave_configure(Scsi_Device *);
591 static void ahc_linux_slave_destroy(Scsi_Device *);
592 #if defined(__i386__)
593 static int ahc_linux_biosparam(struct scsi_device*,
594 struct block_device*,
597 static int ahc_linux_bus_reset(Scsi_Cmnd *);
598 static int ahc_linux_dev_reset(Scsi_Cmnd *);
599 static int ahc_linux_abort(Scsi_Cmnd *);
602 * Try to detect an Adaptec 7XXX controller.
605 ahc_linux_detect(Scsi_Host_Template *template)
607 struct ahc_softc *ahc;
611 * Sanity checking of Linux SCSI data structures so
612 * that some of our hacks^H^H^H^H^Hassumptions aren't
615 if (offsetof(struct ahc_cmd_internal, end)
616 > offsetof(struct scsi_cmnd, host_scribble)) {
617 printf("ahc_linux_detect: SCSI data structures changed.\n");
618 printf("ahc_linux_detect: Unable to attach\n");
622 * If we've been passed any parameters, process them now.
625 aic7xxx_setup(aic7xxx);
627 template->proc_name = "aic7xxx";
630 * Initialize our softc list lock prior to
631 * probing for any adapters.
635 found = ahc_linux_pci_init();
636 if (!ahc_linux_eisa_init())
640 * Register with the SCSI layer all
641 * controllers we've found.
643 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
645 if (ahc_linux_register_host(ahc, template) == 0)
649 aic7xxx_detect_complete++;
655 * Return a string describing the driver.
658 ahc_linux_info(struct Scsi_Host *host)
660 static char buffer[512];
663 struct ahc_softc *ahc;
666 ahc = *(struct ahc_softc **)host->hostdata;
667 memset(bp, 0, sizeof(buffer));
668 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
669 strcat(bp, AIC7XXX_DRIVER_VERSION);
672 strcat(bp, ahc->description);
675 ahc_controller_info(ahc, ahc_info);
676 strcat(bp, ahc_info);
683 * Queue an SCB to the controller.
686 ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *))
688 struct ahc_softc *ahc;
689 struct ahc_linux_device *dev;
691 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
694 * Save the callback on completion function.
696 cmd->scsi_done = scsi_done;
699 * Close the race of a command that was in the process of
700 * being queued to us just as our simq was frozen. Let
701 * DV commands through so long as we are only frozen to
704 if (ahc->platform_data->qfrozen != 0)
705 return SCSI_MLQUEUE_HOST_BUSY;
707 dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
708 cmd->device->lun, /*alloc*/TRUE);
711 cmd->result = CAM_REQ_INPROG << 16;
713 return ahc_linux_run_command(ahc, dev, cmd);
717 ahc_linux_slave_alloc(Scsi_Device *device)
719 struct ahc_softc *ahc;
721 ahc = *((struct ahc_softc **)device->host->hostdata);
723 printf("%s: Slave Alloc %d\n", ahc_name(ahc), device->id);
728 ahc_linux_slave_configure(Scsi_Device *device)
730 struct ahc_softc *ahc;
731 struct ahc_linux_device *dev;
733 ahc = *((struct ahc_softc **)device->host->hostdata);
735 printf("%s: Slave Configure %d\n", ahc_name(ahc), device->id);
737 * Since Linux has attached to the device, configure
738 * it so we don't free and allocate the device
739 * structure on every command.
741 dev = ahc_linux_get_device(ahc, device->channel,
742 device->id, device->lun,
745 dev->flags &= ~AHC_DEV_UNCONFIGURED;
746 dev->scsi_device = device;
747 ahc_linux_device_queue_depth(ahc, dev);
750 /* Initial Domain Validation */
751 if (!spi_initial_dv(device->sdev_target))
752 spi_dv_device(device);
758 ahc_linux_slave_destroy(Scsi_Device *device)
760 struct ahc_softc *ahc;
761 struct ahc_linux_device *dev;
763 ahc = *((struct ahc_softc **)device->host->hostdata);
765 printf("%s: Slave Destroy %d\n", ahc_name(ahc), device->id);
766 dev = ahc_linux_get_device(ahc, device->channel,
767 device->id, device->lun,
770 * Filter out "silly" deletions of real devices by only
771 * deleting devices that have had slave_configure()
772 * called on them. All other devices that have not
773 * been configured will automatically be deleted by
774 * the refcounting process.
777 && (dev->flags & AHC_DEV_SLAVE_CONFIGURED) != 0) {
778 dev->flags |= AHC_DEV_UNCONFIGURED;
780 && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
781 ahc_linux_free_device(ahc, dev);
785 #if defined(__i386__)
787 * Return the disk geometry for the given SCSI device.
790 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
791 sector_t capacity, int geom[])
799 struct ahc_softc *ahc;
802 ahc = *((struct ahc_softc **)sdev->host->hostdata);
803 channel = sdev->channel;
805 bh = scsi_bios_ptable(bdev);
807 ret = scsi_partsize(bh, capacity,
808 &geom[2], &geom[0], &geom[1]);
815 cylinders = aic_sector_div(capacity, heads, sectors);
817 if (aic7xxx_extended != 0)
819 else if (channel == 0)
820 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
822 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
823 if (extended && cylinders >= 1024) {
826 cylinders = aic_sector_div(capacity, heads, sectors);
836 * Abort the current SCSI command(s).
839 ahc_linux_abort(Scsi_Cmnd *cmd)
843 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
845 printf("aic7xxx_abort returns 0x%x\n", error);
850 * Attempt to send a target reset message to the device that timed out.
853 ahc_linux_dev_reset(Scsi_Cmnd *cmd)
857 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
859 printf("aic7xxx_dev_reset returns 0x%x\n", error);
864 * Reset the SCSI bus.
867 ahc_linux_bus_reset(Scsi_Cmnd *cmd)
869 struct ahc_softc *ahc;
872 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
873 found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
874 /*initiate reset*/TRUE);
875 ahc_linux_run_complete_queue(ahc);
878 printf("%s: SCSI bus reset delivered. "
879 "%d SCBs aborted.\n", ahc_name(ahc), found);
884 Scsi_Host_Template aic7xxx_driver_template = {
885 .module = THIS_MODULE,
887 .proc_info = ahc_linux_proc_info,
888 .info = ahc_linux_info,
889 .queuecommand = ahc_linux_queue,
890 .eh_abort_handler = ahc_linux_abort,
891 .eh_device_reset_handler = ahc_linux_dev_reset,
892 .eh_bus_reset_handler = ahc_linux_bus_reset,
893 #if defined(__i386__)
894 .bios_param = ahc_linux_biosparam,
896 .can_queue = AHC_MAX_QUEUE,
899 .use_clustering = ENABLE_CLUSTERING,
900 .slave_alloc = ahc_linux_slave_alloc,
901 .slave_configure = ahc_linux_slave_configure,
902 .slave_destroy = ahc_linux_slave_destroy,
905 /**************************** Tasklet Handler *********************************/
907 /******************************** Macros **************************************/
908 #define BUILD_SCSIID(ahc, cmd) \
909 ((((cmd)->device->id << TID_SHIFT) & TID) \
910 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
911 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
913 /******************************** Bus DMA *************************************/
915 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
916 bus_size_t alignment, bus_size_t boundary,
917 dma_addr_t lowaddr, dma_addr_t highaddr,
918 bus_dma_filter_t *filter, void *filterarg,
919 bus_size_t maxsize, int nsegments,
920 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
924 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
929 * Linux is very simplistic about DMA memory. For now don't
930 * maintain all specification information. Once Linux supplies
931 * better facilities for doing these operations, or the
932 * needs of this particular driver change, we might need to do
935 dmat->alignment = alignment;
936 dmat->boundary = boundary;
937 dmat->maxsize = maxsize;
943 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
945 free(dmat, M_DEVBUF);
949 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
950 int flags, bus_dmamap_t *mapp)
952 *vaddr = pci_alloc_consistent(ahc->dev_softc,
953 dmat->maxsize, mapp);
960 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
961 void* vaddr, bus_dmamap_t map)
963 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
968 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
969 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
970 void *cb_arg, int flags)
973 * Assume for now that this will only be used during
974 * initialization and not for per-transaction buffer mapping.
976 bus_dma_segment_t stack_sg;
978 stack_sg.ds_addr = map;
979 stack_sg.ds_len = dmat->maxsize;
980 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
985 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
990 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
996 /********************* Platform Dependent Functions ***************************/
998 * Compare "left hand" softc with "right hand" softc, returning:
999 * < 0 - lahc has a lower priority than rahc
1000 * 0 - Softcs are equal
1001 * > 0 - lahc has a higher priority than rahc
1004 ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
1011 * Under Linux, cards are ordered as follows:
1012 * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
1013 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
1014 * 3) All remaining VLB/EISA devices sorted by ioport.
1015 * 4) All remaining PCI devices sorted by bus/slot/func.
1017 value = (lahc->flags & AHC_BIOS_ENABLED)
1018 - (rahc->flags & AHC_BIOS_ENABLED);
1020 /* Controllers with BIOS enabled have a *higher* priority */
1024 * Same BIOS setting, now sort based on bus type.
1025 * EISA and VL controllers sort together. EISA/VL
1026 * have higher priority than PCI.
1028 rvalue = (rahc->chip & AHC_BUS_MASK);
1029 if (rvalue == AHC_VL)
1031 lvalue = (lahc->chip & AHC_BUS_MASK);
1032 if (lvalue == AHC_VL)
1034 value = rvalue - lvalue;
1038 /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
1043 char primary_channel;
1045 if (aic7xxx_reverse_scan != 0)
1046 value = ahc_get_pci_bus(lahc->dev_softc)
1047 - ahc_get_pci_bus(rahc->dev_softc);
1049 value = ahc_get_pci_bus(rahc->dev_softc)
1050 - ahc_get_pci_bus(lahc->dev_softc);
1053 if (aic7xxx_reverse_scan != 0)
1054 value = ahc_get_pci_slot(lahc->dev_softc)
1055 - ahc_get_pci_slot(rahc->dev_softc);
1057 value = ahc_get_pci_slot(rahc->dev_softc)
1058 - ahc_get_pci_slot(lahc->dev_softc);
1062 * On multi-function devices, the user can choose
1063 * to have function 1 probed before function 0.
1064 * Give whichever channel is the primary channel
1065 * the highest priority.
1067 primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
1069 if (lahc->channel == primary_channel)
1075 if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
1076 value = rahc->platform_data->bios_address
1077 - lahc->platform_data->bios_address;
1079 value = rahc->bsh.ioport
1084 panic("ahc_softc_sort: invalid bus type");
1090 ahc_linux_setup_tag_info_global(char *p)
1094 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1095 printf("Setting Global Tags= %d\n", tags);
1097 for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
1098 for (j = 0; j < AHC_NUM_TARGETS; j++) {
1099 aic7xxx_tag_info[i].tag_commands[j] = tags;
1105 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1108 if ((instance >= 0) && (targ >= 0)
1109 && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
1110 && (targ < AHC_NUM_TARGETS)) {
1111 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
1113 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1118 * Handle Linux boot parameters. This routine allows for assigning a value
1119 * to a parameter with a ':' between the parameter and the value.
1120 * ie. aic7xxx=stpwlev:1,extended
1123 aic7xxx_setup(char *s)
1133 { "extended", &aic7xxx_extended },
1134 { "no_reset", &aic7xxx_no_reset },
1135 { "verbose", &aic7xxx_verbose },
1136 { "allow_memio", &aic7xxx_allow_memio},
1138 { "debug", &ahc_debug },
1140 { "reverse_scan", &aic7xxx_reverse_scan },
1141 { "no_probe", &aic7xxx_probe_eisa_vl },
1142 { "probe_eisa_vl", &aic7xxx_probe_eisa_vl },
1143 { "periodic_otag", &aic7xxx_periodic_otag },
1144 { "pci_parity", &aic7xxx_pci_parity },
1145 { "seltime", &aic7xxx_seltime },
1146 { "tag_info", NULL },
1147 { "global_tag_depth", NULL },
1151 end = strchr(s, '\0');
1154 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1155 * will never be 0 in this case.
1159 while ((p = strsep(&s, ",.")) != NULL) {
1162 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1164 n = strlen(options[i].name);
1165 if (strncmp(options[i].name, p, n) == 0)
1168 if (i == NUM_ELEMENTS(options))
1171 if (strncmp(p, "global_tag_depth", n) == 0) {
1172 ahc_linux_setup_tag_info_global(p + n);
1173 } else if (strncmp(p, "tag_info", n) == 0) {
1174 s = aic_parse_brace_option("tag_info", p + n, end,
1175 2, ahc_linux_setup_tag_info, 0);
1176 } else if (p[n] == ':') {
1177 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1178 } else if (strncmp(p, "verbose", n) == 0) {
1179 *(options[i].flag) = 1;
1181 *(options[i].flag) ^= 0xFFFFFFFF;
1187 __setup("aic7xxx=", aic7xxx_setup);
1189 uint32_t aic7xxx_verbose;
1192 ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
1195 struct Scsi_Host *host;
1199 template->name = ahc->description;
1200 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1204 *((struct ahc_softc **)host->hostdata) = ahc;
1206 scsi_assign_lock(host, &ahc->platform_data->spin_lock);
1207 ahc->platform_data->host = host;
1208 host->can_queue = AHC_MAX_QUEUE;
1209 host->cmd_per_lun = 2;
1210 /* XXX No way to communicate the ID for multiple channels */
1211 host->this_id = ahc->our_id;
1212 host->irq = ahc->platform_data->irq;
1213 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1214 host->max_lun = AHC_NUM_LUNS;
1215 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1216 host->sg_tablesize = AHC_NSEG;
1217 ahc_set_unit(ahc, ahc_linux_next_unit());
1218 sprintf(buf, "scsi%d", host->host_no);
1219 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1220 if (new_name != NULL) {
1221 strcpy(new_name, buf);
1222 ahc_set_name(ahc, new_name);
1224 host->unique_id = ahc->unit;
1225 ahc_linux_initialize_scsi_bus(ahc);
1226 ahc_intr_enable(ahc, TRUE);
1227 ahc_unlock(ahc, &s);
1229 host->transportt = ahc_linux_transport_template;
1231 scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
1232 scsi_scan_host(host);
1237 ahc_linux_get_memsize(void)
1242 return ((uint64_t)si.totalram << PAGE_SHIFT);
1246 * Find the smallest available unit number to use
1247 * for a new device. We don't just use a static
1248 * count to handle the "repeated hot-(un)plug"
1252 ahc_linux_next_unit(void)
1254 struct ahc_softc *ahc;
1259 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
1260 if (ahc->unit == unit) {
1269 * Place the SCSI bus into a known state by either resetting it,
1270 * or forcing transfer negotiations on the next command to any
1274 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1282 if (aic7xxx_no_reset != 0)
1283 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1285 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1286 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1288 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1290 if ((ahc->features & AHC_TWIN) != 0) {
1292 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1293 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1302 * Force negotiation to async for all targets that
1303 * will not see an initial bus reset.
1305 for (; i < numtarg; i++) {
1306 struct ahc_devinfo devinfo;
1307 struct ahc_initiator_tinfo *tinfo;
1308 struct ahc_tmode_tstate *tstate;
1314 our_id = ahc->our_id;
1316 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1318 our_id = ahc->our_id_b;
1321 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1322 target_id, &tstate);
1323 ahc_compile_devinfo(&devinfo, our_id, target_id,
1324 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1325 ahc_update_neg_request(ahc, &devinfo, tstate,
1326 tinfo, AHC_NEG_ALWAYS);
1328 /* Give the bus some time to recover */
1329 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1330 ahc_linux_freeze_simq(ahc);
1331 init_timer(&ahc->platform_data->reset_timer);
1332 ahc->platform_data->reset_timer.data = (u_long)ahc;
1333 ahc->platform_data->reset_timer.expires =
1334 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
1335 ahc->platform_data->reset_timer.function =
1336 ahc_linux_release_simq;
1337 add_timer(&ahc->platform_data->reset_timer);
1342 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1345 ahc->platform_data =
1346 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1347 if (ahc->platform_data == NULL)
1349 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1350 TAILQ_INIT(&ahc->platform_data->completeq);
1351 TAILQ_INIT(&ahc->platform_data->device_runq);
1352 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1354 init_timer(&ahc->platform_data->completeq_timer);
1355 ahc->platform_data->completeq_timer.data = (u_long)ahc;
1356 ahc->platform_data->completeq_timer.function =
1357 (ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue;
1358 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
1359 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1360 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1361 if (aic7xxx_pci_parity == 0)
1362 ahc->flags |= AHC_DISABLE_PCI_PERR;
1368 ahc_platform_free(struct ahc_softc *ahc)
1370 struct ahc_linux_target *targ;
1371 struct ahc_linux_device *dev;
1374 if (ahc->platform_data != NULL) {
1375 del_timer_sync(&ahc->platform_data->completeq_timer);
1376 if (ahc->platform_data->host != NULL) {
1377 scsi_remove_host(ahc->platform_data->host);
1378 scsi_host_put(ahc->platform_data->host);
1381 /* destroy all of the device and target objects */
1382 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1383 targ = ahc->platform_data->targets[i];
1385 /* Keep target around through the loop. */
1387 for (j = 0; j < AHC_NUM_LUNS; j++) {
1389 if (targ->devices[j] == NULL)
1391 dev = targ->devices[j];
1392 ahc_linux_free_device(ahc, dev);
1395 * Forcibly free the target now that
1396 * all devices are gone.
1398 ahc_linux_free_target(ahc, targ);
1402 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1403 free_irq(ahc->platform_data->irq, ahc);
1404 if (ahc->tag == BUS_SPACE_PIO
1405 && ahc->bsh.ioport != 0)
1406 release_region(ahc->bsh.ioport, 256);
1407 if (ahc->tag == BUS_SPACE_MEMIO
1408 && ahc->bsh.maddr != NULL) {
1409 iounmap(ahc->bsh.maddr);
1410 release_mem_region(ahc->platform_data->mem_busaddr,
1414 free(ahc->platform_data, M_DEVBUF);
1419 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1421 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1422 SCB_GET_CHANNEL(ahc, scb),
1423 SCB_GET_LUN(scb), SCB_LIST_NULL,
1424 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1428 ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1431 struct ahc_linux_device *dev;
1435 dev = ahc_linux_get_device(ahc, devinfo->channel - 'A',
1437 devinfo->lun, /*alloc*/FALSE);
1440 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1443 case AHC_QUEUE_NONE:
1446 case AHC_QUEUE_BASIC:
1447 now_queuing = AHC_DEV_Q_BASIC;
1449 case AHC_QUEUE_TAGGED:
1450 now_queuing = AHC_DEV_Q_TAGGED;
1453 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1454 && (was_queuing != now_queuing)
1455 && (dev->active != 0)) {
1456 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1460 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1464 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1467 * Start out agressively and allow our
1468 * dynamic queue depth algorithm to take
1471 dev->maxtags = usertags;
1472 dev->openings = dev->maxtags - dev->active;
1474 if (dev->maxtags == 0) {
1476 * Queueing is disabled by the user.
1479 } else if (alg == AHC_QUEUE_TAGGED) {
1480 dev->flags |= AHC_DEV_Q_TAGGED;
1481 if (aic7xxx_periodic_otag != 0)
1482 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1484 dev->flags |= AHC_DEV_Q_BASIC;
1486 /* We can only have one opening. */
1488 dev->openings = 1 - dev->active;
1490 if (dev->scsi_device != NULL) {
1491 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1492 case AHC_DEV_Q_BASIC:
1493 scsi_adjust_queue_depth(dev->scsi_device,
1495 dev->openings + dev->active);
1497 case AHC_DEV_Q_TAGGED:
1498 scsi_adjust_queue_depth(dev->scsi_device,
1500 dev->openings + dev->active);
1504 * We allow the OS to queue 2 untagged transactions to
1505 * us at any time even though we can only execute them
1506 * serially on the controller/device. This should
1507 * remove some latency.
1509 scsi_adjust_queue_depth(dev->scsi_device,
1518 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1519 int lun, u_int tag, role_t role, uint32_t status)
1525 ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc)
1529 ahc_lock(ahc, &flags);
1530 del_timer(&ahc->platform_data->completeq_timer);
1531 ahc->platform_data->flags &= ~AHC_RUN_CMPLT_Q_TIMER;
1532 ahc_linux_run_complete_queue(ahc);
1533 ahc_unlock(ahc, &flags);
1537 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1539 static int warned_user;
1543 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1544 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
1545 if (warned_user == 0) {
1548 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1549 "aic7xxx: for installed controllers. Using defaults\n"
1550 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1551 "aic7xxx: the aic7xxx_osm..c source file.\n");
1554 tags = AHC_MAX_QUEUE;
1556 adapter_tag_info_t *tag_info;
1558 tag_info = &aic7xxx_tag_info[ahc->unit];
1559 tags = tag_info->tag_commands[devinfo->target_offset];
1560 if (tags > AHC_MAX_QUEUE)
1561 tags = AHC_MAX_QUEUE;
1568 * Determines the queue depth for a given device.
1571 ahc_linux_device_queue_depth(struct ahc_softc *ahc,
1572 struct ahc_linux_device *dev)
1574 struct ahc_devinfo devinfo;
1577 ahc_compile_devinfo(&devinfo,
1578 dev->target->channel == 0
1579 ? ahc->our_id : ahc->our_id_b,
1580 dev->target->target, dev->lun,
1581 dev->target->channel == 0 ? 'A' : 'B',
1583 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1585 && dev->scsi_device != NULL
1586 && dev->scsi_device->tagged_supported != 0) {
1588 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
1589 ahc_print_devinfo(ahc, &devinfo);
1590 printf("Tagged Queuing enabled. Depth %d\n", tags);
1592 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
1597 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1598 struct scsi_cmnd *cmd)
1601 struct hardware_scb *hscb;
1602 struct ahc_initiator_tinfo *tinfo;
1603 struct ahc_tmode_tstate *tstate;
1605 struct scb_tailq *untagged_q = NULL;
1608 * Schedule us to run later. The only reason we are not
1609 * running is because the whole controller Q is frozen.
1611 if (ahc->platform_data->qfrozen != 0)
1612 return SCSI_MLQUEUE_HOST_BUSY;
1615 * We only allow one untagged transaction
1616 * per target in the initiator role unless
1617 * we are storing a full busy target *lun*
1618 * table in SCB space.
1620 if (!blk_rq_tagged(cmd->request)
1621 && (ahc->features & AHC_SCB_BTT) == 0) {
1624 target_offset = cmd->device->id + cmd->device->channel * 8;
1625 untagged_q = &(ahc->untagged_queues[target_offset]);
1626 if (!TAILQ_EMPTY(untagged_q))
1627 /* if we're already executing an untagged command
1628 * we're busy to another */
1629 return SCSI_MLQUEUE_DEVICE_BUSY;
1633 * Get an scb to use.
1635 if ((scb = ahc_get_scb(ahc)) == NULL) {
1636 ahc->flags |= AHC_RESOURCE_SHORTAGE;
1637 return SCSI_MLQUEUE_HOST_BUSY;
1641 scb->platform_data->dev = dev;
1643 cmd->host_scribble = (char *)scb;
1646 * Fill out basics of the HSCB.
1649 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1650 hscb->lun = cmd->device->lun;
1651 mask = SCB_GET_TARGET_MASK(ahc, scb);
1652 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1653 SCB_GET_OUR_ID(scb),
1654 SCB_GET_TARGET(ahc, scb), &tstate);
1655 hscb->scsirate = tinfo->scsirate;
1656 hscb->scsioffset = tinfo->curr.offset;
1657 if ((tstate->ultraenb & mask) != 0)
1658 hscb->control |= ULTRAENB;
1660 if ((ahc->user_discenable & mask) != 0)
1661 hscb->control |= DISCENB;
1663 if ((tstate->auto_negotiate & mask) != 0) {
1664 scb->flags |= SCB_AUTO_NEGOTIATE;
1665 scb->hscb->control |= MK_MESSAGE;
1668 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1670 uint8_t tag_msgs[2];
1672 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1673 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1674 hscb->control |= tag_msgs[0];
1675 if (tag_msgs[0] == MSG_ORDERED_TASK)
1676 dev->commands_since_idle_or_otag = 0;
1677 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1678 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1679 hscb->control |= MSG_ORDERED_TASK;
1680 dev->commands_since_idle_or_otag = 0;
1682 hscb->control |= MSG_SIMPLE_TASK;
1686 hscb->cdb_len = cmd->cmd_len;
1687 if (hscb->cdb_len <= 12) {
1688 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1690 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1691 scb->flags |= SCB_CDB32_PTR;
1694 scb->platform_data->xfer_len = 0;
1695 ahc_set_residual(scb, 0);
1696 ahc_set_sense_residual(scb, 0);
1698 if (cmd->use_sg != 0) {
1699 struct ahc_dma_seg *sg;
1700 struct scatterlist *cur_seg;
1701 struct scatterlist *end_seg;
1704 cur_seg = (struct scatterlist *)cmd->request_buffer;
1705 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
1706 cmd->sc_data_direction);
1707 end_seg = cur_seg + nseg;
1708 /* Copy the segments into the SG list. */
1711 * The sg_count may be larger than nseg if
1712 * a transfer crosses a 32bit page.
1714 while (cur_seg < end_seg) {
1719 addr = sg_dma_address(cur_seg);
1720 len = sg_dma_len(cur_seg);
1721 consumed = ahc_linux_map_seg(ahc, scb,
1724 scb->sg_count += consumed;
1728 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1731 * Reset the sg list pointer.
1734 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1737 * Copy the first SG into the "current"
1738 * data pointer area.
1740 scb->hscb->dataptr = scb->sg_list->addr;
1741 scb->hscb->datacnt = scb->sg_list->len;
1742 } else if (cmd->request_bufflen != 0) {
1743 struct ahc_dma_seg *sg;
1747 addr = pci_map_single(ahc->dev_softc,
1748 cmd->request_buffer,
1749 cmd->request_bufflen,
1750 cmd->sc_data_direction);
1751 scb->platform_data->buf_busaddr = addr;
1752 scb->sg_count = ahc_linux_map_seg(ahc, scb,
1754 cmd->request_bufflen);
1755 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1758 * Reset the sg list pointer.
1761 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1764 * Copy the first SG into the "current"
1765 * data pointer area.
1767 scb->hscb->dataptr = sg->addr;
1768 scb->hscb->datacnt = sg->len;
1770 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1771 scb->hscb->dataptr = 0;
1772 scb->hscb->datacnt = 0;
1776 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1779 dev->commands_issued++;
1780 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1781 dev->commands_since_idle_or_otag++;
1783 scb->flags |= SCB_ACTIVE;
1785 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1786 scb->flags |= SCB_UNTAGGEDQ;
1788 ahc_queue_scb(ahc, scb);
1793 * SCSI controller interrupt handler.
1796 ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1798 struct ahc_softc *ahc;
1802 ahc = (struct ahc_softc *) dev_id;
1803 ahc_lock(ahc, &flags);
1804 ours = ahc_intr(ahc);
1805 ahc_linux_run_complete_queue(ahc);
1806 ahc_unlock(ahc, &flags);
1807 return IRQ_RETVAL(ours);
1811 ahc_platform_flushwork(struct ahc_softc *ahc)
1814 while (ahc_linux_run_complete_queue(ahc) != NULL)
1818 static struct ahc_linux_target*
1819 ahc_linux_alloc_target(struct ahc_softc *ahc, u_int channel, u_int target)
1821 struct ahc_linux_target *targ;
1822 u_int target_offset;
1824 target_offset = target;
1828 targ = malloc(sizeof(*targ), M_DEVBUG, M_NOWAIT);
1831 memset(targ, 0, sizeof(*targ));
1832 targ->channel = channel;
1833 targ->target = target;
1835 ahc->platform_data->targets[target_offset] = targ;
1840 ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ)
1842 struct ahc_devinfo devinfo;
1843 struct ahc_initiator_tinfo *tinfo;
1844 struct ahc_tmode_tstate *tstate;
1846 u_int target_offset;
1850 * Force a negotiation to async/narrow on any
1851 * future command to this device unless a bus
1852 * reset occurs between now and that command.
1854 channel = 'A' + targ->channel;
1855 our_id = ahc->our_id;
1856 target_offset = targ->target;
1857 if (targ->channel != 0) {
1859 our_id = ahc->our_id_b;
1861 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1862 targ->target, &tstate);
1863 ahc_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD,
1864 channel, ROLE_INITIATOR);
1865 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
1866 AHC_TRANS_GOAL, /*paused*/FALSE);
1867 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
1868 AHC_TRANS_GOAL, /*paused*/FALSE);
1869 ahc_update_neg_request(ahc, &devinfo, tstate, tinfo, AHC_NEG_ALWAYS);
1870 ahc->platform_data->targets[target_offset] = NULL;
1871 free(targ, M_DEVBUF);
1874 static struct ahc_linux_device*
1875 ahc_linux_alloc_device(struct ahc_softc *ahc,
1876 struct ahc_linux_target *targ, u_int lun)
1878 struct ahc_linux_device *dev;
1880 dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
1883 memset(dev, 0, sizeof(*dev));
1884 init_timer(&dev->timer);
1885 dev->flags = AHC_DEV_UNCONFIGURED;
1890 * We start out life using untagged
1891 * transactions of which we allow one.
1896 * Set maxtags to 0. This will be changed if we
1897 * later determine that we are dealing with
1898 * a tagged queuing capable device.
1903 targ->devices[lun] = dev;
1908 __ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
1910 struct ahc_linux_target *targ;
1913 targ->devices[dev->lun] = NULL;
1914 free(dev, M_DEVBUF);
1916 if (targ->refcount == 0)
1917 ahc_linux_free_target(ahc, targ);
1921 ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
1923 del_timer_sync(&dev->timer);
1924 __ahc_linux_free_device(ahc, dev);
1928 ahc_send_async(struct ahc_softc *ahc, char channel,
1929 u_int target, u_int lun, ac_code code, void *arg)
1932 case AC_TRANSFER_NEG:
1935 struct ahc_linux_target *targ;
1936 struct info_str info;
1937 struct ahc_initiator_tinfo *tinfo;
1938 struct ahc_tmode_tstate *tstate;
1942 info.length = sizeof(buf);
1945 tinfo = ahc_fetch_transinfo(ahc, channel,
1946 channel == 'A' ? ahc->our_id
1951 * Don't bother reporting results while
1952 * negotiations are still pending.
1954 if (tinfo->curr.period != tinfo->goal.period
1955 || tinfo->curr.width != tinfo->goal.width
1956 || tinfo->curr.offset != tinfo->goal.offset
1957 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1958 if (bootverbose == 0)
1962 * Don't bother reporting results that
1963 * are identical to those last reported.
1965 target_offset = target;
1968 targ = ahc->platform_data->targets[target_offset];
1971 if (tinfo->curr.period == targ->last_tinfo.period
1972 && tinfo->curr.width == targ->last_tinfo.width
1973 && tinfo->curr.offset == targ->last_tinfo.offset
1974 && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
1975 if (bootverbose == 0)
1978 targ->last_tinfo.period = tinfo->curr.period;
1979 targ->last_tinfo.width = tinfo->curr.width;
1980 targ->last_tinfo.offset = tinfo->curr.offset;
1981 targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
1983 printf("(%s:%c:", ahc_name(ahc), channel);
1984 if (target == CAM_TARGET_WILDCARD)
1987 printf("%d): ", target);
1988 ahc_format_transinfo(&info, &tinfo->curr);
1989 if (info.pos < info.length)
1990 *info.buffer = '\0';
1992 buf[info.length - 1] = '\0';
1998 WARN_ON(lun != CAM_LUN_WILDCARD);
1999 scsi_report_device_reset(ahc->platform_data->host,
2000 channel - 'A', target);
2004 if (ahc->platform_data->host != NULL) {
2005 scsi_report_bus_reset(ahc->platform_data->host,
2010 panic("ahc_send_async: Unexpected async event");
2015 * Calls the higher level scsi done function and frees the scb.
2018 ahc_done(struct ahc_softc *ahc, struct scb *scb)
2021 struct ahc_linux_device *dev;
2023 LIST_REMOVE(scb, pending_links);
2024 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
2025 struct scb_tailq *untagged_q;
2028 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
2029 untagged_q = &(ahc->untagged_queues[target_offset]);
2030 TAILQ_REMOVE(untagged_q, scb, links.tqe);
2031 BUG_ON(!TAILQ_EMPTY(untagged_q));
2034 if ((scb->flags & SCB_ACTIVE) == 0) {
2035 printf("SCB %d done'd twice\n", scb->hscb->tag);
2036 ahc_dump_card_state(ahc);
2037 panic("Stopping for safety");
2040 dev = scb->platform_data->dev;
2043 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
2044 cmd->result &= ~(CAM_DEV_QFRZN << 16);
2047 ahc_linux_unmap_scb(ahc, scb);
2050 * Guard against stale sense data.
2051 * The Linux mid-layer assumes that sense
2052 * was retrieved anytime the first byte of
2053 * the sense buffer looks "sane".
2055 cmd->sense_buffer[0] = 0;
2056 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
2057 uint32_t amount_xferred;
2060 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
2061 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
2063 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
2064 ahc_print_path(ahc, scb);
2065 printf("Set CAM_UNCOR_PARITY\n");
2068 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
2069 #ifdef AHC_REPORT_UNDERFLOWS
2071 * This code is disabled by default as some
2072 * clients of the SCSI system do not properly
2073 * initialize the underflow parameter. This
2074 * results in spurious termination of commands
2075 * that complete as expected (e.g. underflow is
2076 * allowed as command can return variable amounts
2079 } else if (amount_xferred < scb->io_ctx->underflow) {
2082 ahc_print_path(ahc, scb);
2084 for (i = 0; i < scb->io_ctx->cmd_len; i++)
2085 printf(" 0x%x", scb->io_ctx->cmnd[i]);
2087 ahc_print_path(ahc, scb);
2088 printf("Saw underflow (%ld of %ld bytes). "
2089 "Treated as error\n",
2090 ahc_get_residual(scb),
2091 ahc_get_transfer_length(scb));
2092 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
2095 ahc_set_transaction_status(scb, CAM_REQ_CMP);
2097 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
2098 ahc_linux_handle_scsi_status(ahc, dev, scb);
2099 } else if (ahc_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
2100 dev->flags |= AHC_DEV_UNCONFIGURED;
2103 if (dev->openings == 1
2104 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
2105 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
2106 dev->tag_success_count++;
2108 * Some devices deal with temporary internal resource
2109 * shortages by returning queue full. When the queue
2110 * full occurrs, we throttle back. Slowly try to get
2111 * back to our previous queue depth.
2113 if ((dev->openings + dev->active) < dev->maxtags
2114 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
2115 dev->tag_success_count = 0;
2119 if (dev->active == 0)
2120 dev->commands_since_idle_or_otag = 0;
2122 if ((dev->flags & AHC_DEV_UNCONFIGURED) != 0
2124 && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
2125 ahc_linux_free_device(ahc, dev);
2126 else if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
2127 TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
2128 dev->flags |= AHC_DEV_ON_RUN_LIST;
2131 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
2132 printf("Recovery SCB completes\n");
2133 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
2134 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
2135 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
2136 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2137 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2138 up(&ahc->platform_data->eh_sem);
2142 ahc_free_scb(ahc, scb);
2143 ahc_linux_queue_cmd_complete(ahc, cmd);
2147 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
2148 struct ahc_linux_device *dev, struct scb *scb)
2150 struct ahc_devinfo devinfo;
2152 ahc_compile_devinfo(&devinfo,
2154 dev->target->target, dev->lun,
2155 dev->target->channel == 0 ? 'A' : 'B',
2159 * We don't currently trust the mid-layer to
2160 * properly deal with queue full or busy. So,
2161 * when one occurs, we tell the mid-layer to
2162 * unconditionally requeue the command to us
2163 * so that we can retry it ourselves. We also
2164 * implement our own throttling mechanism so
2165 * we don't clobber the device with too many
2168 switch (ahc_get_scsi_status(scb)) {
2171 case SCSI_STATUS_CHECK_COND:
2172 case SCSI_STATUS_CMD_TERMINATED:
2177 * Copy sense information to the OS's cmd
2178 * structure if it is available.
2181 if (scb->flags & SCB_SENSE) {
2184 sense_size = MIN(sizeof(struct scsi_sense_data)
2185 - ahc_get_sense_residual(scb),
2186 sizeof(cmd->sense_buffer));
2187 memcpy(cmd->sense_buffer,
2188 ahc_get_sense_buf(ahc, scb), sense_size);
2189 if (sense_size < sizeof(cmd->sense_buffer))
2190 memset(&cmd->sense_buffer[sense_size], 0,
2191 sizeof(cmd->sense_buffer) - sense_size);
2192 cmd->result |= (DRIVER_SENSE << 24);
2194 if (ahc_debug & AHC_SHOW_SENSE) {
2197 printf("Copied %d bytes of sense data:",
2199 for (i = 0; i < sense_size; i++) {
2202 printf("0x%x ", cmd->sense_buffer[i]);
2210 case SCSI_STATUS_QUEUE_FULL:
2213 * By the time the core driver has returned this
2214 * command, all other commands that were queued
2215 * to us but not the device have been returned.
2216 * This ensures that dev->active is equal to
2217 * the number of commands actually queued to
2220 dev->tag_success_count = 0;
2221 if (dev->active != 0) {
2223 * Drop our opening count to the number
2224 * of commands currently outstanding.
2228 ahc_print_path(ahc, scb);
2229 printf("Dropping tag count to %d\n", dev->active);
2231 if (dev->active == dev->tags_on_last_queuefull) {
2233 dev->last_queuefull_same_count++;
2235 * If we repeatedly see a queue full
2236 * at the same queue depth, this
2237 * device has a fixed number of tag
2238 * slots. Lock in this tag depth
2239 * so we stop seeing queue fulls from
2242 if (dev->last_queuefull_same_count
2243 == AHC_LOCK_TAGS_COUNT) {
2244 dev->maxtags = dev->active;
2245 ahc_print_path(ahc, scb);
2246 printf("Locking max tag count at %d\n",
2250 dev->tags_on_last_queuefull = dev->active;
2251 dev->last_queuefull_same_count = 0;
2253 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
2254 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
2255 ahc_platform_set_tags(ahc, &devinfo,
2256 (dev->flags & AHC_DEV_Q_BASIC)
2257 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
2261 * Drop down to a single opening, and treat this
2262 * as if the target returned BUSY SCSI status.
2265 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
2266 ahc_platform_set_tags(ahc, &devinfo,
2267 (dev->flags & AHC_DEV_Q_BASIC)
2268 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
2271 case SCSI_STATUS_BUSY:
2274 * Set a short timer to defer sending commands for
2275 * a bit since Linux will not delay in this case.
2277 if ((dev->flags & AHC_DEV_TIMER_ACTIVE) != 0) {
2278 printf("%s:%c:%d: Device Timer still active during "
2279 "busy processing\n", ahc_name(ahc),
2280 dev->target->channel, dev->target->target);
2283 dev->flags |= AHC_DEV_TIMER_ACTIVE;
2285 init_timer(&dev->timer);
2286 dev->timer.data = (u_long)dev;
2287 dev->timer.expires = jiffies + (HZ/2);
2288 dev->timer.function = ahc_linux_dev_timed_unfreeze;
2289 add_timer(&dev->timer);
2296 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd)
2299 * Typically, the complete queue has very few entries
2300 * queued to it before the queue is emptied by
2301 * ahc_linux_run_complete_queue, so sorting the entries
2302 * by generation number should be inexpensive.
2303 * We perform the sort so that commands that complete
2304 * with an error are retuned in the order origionally
2305 * queued to the controller so that any subsequent retries
2306 * are performed in order. The underlying ahc routines do
2307 * not guarantee the order that aborted commands will be
2310 struct ahc_completeq *completeq;
2311 struct ahc_cmd *list_cmd;
2312 struct ahc_cmd *acmd;
2315 * Map CAM error codes into Linux Error codes. We
2316 * avoid the conversion so that the DV code has the
2317 * full error information available when making
2318 * state change decisions.
2323 switch (ahc_cmd_get_transaction_status(cmd)) {
2324 case CAM_REQ_INPROG:
2326 case CAM_SCSI_STATUS_ERROR:
2327 new_status = DID_OK;
2329 case CAM_REQ_ABORTED:
2330 new_status = DID_ABORT;
2333 new_status = DID_BUS_BUSY;
2335 case CAM_REQ_INVALID:
2336 case CAM_PATH_INVALID:
2337 new_status = DID_BAD_TARGET;
2339 case CAM_SEL_TIMEOUT:
2340 new_status = DID_NO_CONNECT;
2342 case CAM_SCSI_BUS_RESET:
2344 new_status = DID_RESET;
2346 case CAM_UNCOR_PARITY:
2347 new_status = DID_PARITY;
2349 case CAM_CMD_TIMEOUT:
2350 new_status = DID_TIME_OUT;
2353 case CAM_REQ_CMP_ERR:
2354 case CAM_AUTOSENSE_FAIL:
2356 case CAM_DATA_RUN_ERR:
2357 case CAM_UNEXP_BUSFREE:
2358 case CAM_SEQUENCE_FAIL:
2359 case CAM_CCB_LEN_ERR:
2360 case CAM_PROVIDE_FAIL:
2361 case CAM_REQ_TERMIO:
2362 case CAM_UNREC_HBA_ERROR:
2363 case CAM_REQ_TOO_BIG:
2364 new_status = DID_ERROR;
2366 case CAM_REQUEUE_REQ:
2368 * If we want the request requeued, make sure there
2369 * are sufficent retries. In the old scsi error code,
2370 * we used to be able to specify a result code that
2371 * bypassed the retry count. Now we must use this
2372 * hack. We also "fake" a check condition with
2373 * a sense code of ABORTED COMMAND. This seems to
2374 * evoke a retry even if this command is being sent
2375 * via the eh thread. Ick! Ick! Ick!
2377 if (cmd->retries > 0)
2379 new_status = DID_OK;
2380 ahc_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
2381 cmd->result |= (DRIVER_SENSE << 24);
2382 memset(cmd->sense_buffer, 0,
2383 sizeof(cmd->sense_buffer));
2384 cmd->sense_buffer[0] = SSD_ERRCODE_VALID
2385 | SSD_CURRENT_ERROR;
2386 cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
2389 /* We should never get here */
2390 new_status = DID_ERROR;
2394 ahc_cmd_set_transaction_status(cmd, new_status);
2397 completeq = &ahc->platform_data->completeq;
2398 list_cmd = TAILQ_FIRST(completeq);
2399 acmd = (struct ahc_cmd *)cmd;
2400 while (list_cmd != NULL
2401 && acmd_scsi_cmd(list_cmd).serial_number
2402 < acmd_scsi_cmd(acmd).serial_number)
2403 list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
2404 if (list_cmd != NULL)
2405 TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
2407 TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
2411 ahc_linux_sem_timeout(u_long arg)
2413 struct ahc_softc *ahc;
2416 ahc = (struct ahc_softc *)arg;
2419 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2420 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2421 up(&ahc->platform_data->eh_sem);
2423 ahc_unlock(ahc, &s);
2427 ahc_linux_freeze_simq(struct ahc_softc *ahc)
2429 ahc->platform_data->qfrozen++;
2430 if (ahc->platform_data->qfrozen == 1) {
2431 scsi_block_requests(ahc->platform_data->host);
2433 /* XXX What about Twin channels? */
2434 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2435 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2436 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2441 ahc_linux_release_simq(u_long arg)
2443 struct ahc_softc *ahc;
2447 ahc = (struct ahc_softc *)arg;
2451 if (ahc->platform_data->qfrozen > 0)
2452 ahc->platform_data->qfrozen--;
2453 if (ahc->platform_data->qfrozen == 0)
2455 ahc_unlock(ahc, &s);
2457 * There is still a race here. The mid-layer
2458 * should keep its own freeze count and use
2459 * a bottom half handler to run the queues
2460 * so we can unblock with our own lock held.
2463 scsi_unblock_requests(ahc->platform_data->host);
2467 ahc_linux_dev_timed_unfreeze(u_long arg)
2469 struct ahc_linux_device *dev;
2470 struct ahc_softc *ahc;
2473 dev = (struct ahc_linux_device *)arg;
2474 ahc = dev->target->ahc;
2476 dev->flags &= ~AHC_DEV_TIMER_ACTIVE;
2477 if (dev->qfrozen > 0)
2479 if (dev->active == 0)
2480 __ahc_linux_free_device(ahc, dev);
2481 ahc_unlock(ahc, &s);
2485 ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag)
2487 struct ahc_softc *ahc;
2488 struct ahc_linux_device *dev;
2489 struct scb *pending_scb;
2491 u_int active_scb_index;
2504 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2506 printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
2507 ahc_name(ahc), cmd->device->channel,
2508 cmd->device->id, cmd->device->lun,
2509 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2512 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2513 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2517 * First determine if we currently own this command.
2518 * Start by searching the device queue. If not found
2519 * there, check the pending_scb list. If not found
2520 * at all, and the system wanted us to just abort the
2521 * command, return success.
2523 dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
2524 cmd->device->lun, /*alloc*/FALSE);
2528 * No target device for this command exists,
2529 * so we must not still own the command.
2531 printf("%s:%d:%d:%d: Is not an active device\n",
2532 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2538 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2539 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2540 cmd->device->channel + 'A',
2542 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2543 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2544 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2551 * See if we can find a matching cmd in the pending list.
2553 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2554 if (pending_scb->io_ctx == cmd)
2558 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2560 /* Any SCB for this device will do for a target reset */
2561 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2562 if (ahc_match_scb(ahc, pending_scb, cmd->device->id,
2563 cmd->device->channel + 'A',
2565 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2570 if (pending_scb == NULL) {
2571 printf("%s:%d:%d:%d: Command not found\n",
2572 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2577 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2579 * We can't queue two recovery actions using the same SCB
2586 * Ensure that the card doesn't do anything
2587 * behind our back and that we didn't "just" miss
2588 * an interrupt that would affect this cmd.
2590 was_paused = ahc_is_paused(ahc);
2591 ahc_pause_and_flushwork(ahc);
2594 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2595 printf("%s:%d:%d:%d: Command already completed\n",
2596 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2601 printf("%s: At time of recovery, card was %spaused\n",
2602 ahc_name(ahc), was_paused ? "" : "not ");
2603 ahc_dump_card_state(ahc);
2605 disconnected = TRUE;
2606 if (flag == SCB_ABORT) {
2607 if (ahc_search_qinfifo(ahc, cmd->device->id,
2608 cmd->device->channel + 'A',
2610 pending_scb->hscb->tag,
2611 ROLE_INITIATOR, CAM_REQ_ABORTED,
2612 SEARCH_COMPLETE) > 0) {
2613 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2614 ahc_name(ahc), cmd->device->channel,
2615 cmd->device->id, cmd->device->lun);
2619 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2620 cmd->device->channel + 'A',
2621 cmd->device->lun, pending_scb->hscb->tag,
2622 ROLE_INITIATOR, /*status*/0,
2623 SEARCH_COUNT) > 0) {
2624 disconnected = FALSE;
2627 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2628 struct scb *bus_scb;
2630 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2631 if (bus_scb == pending_scb)
2632 disconnected = FALSE;
2633 else if (flag != SCB_ABORT
2634 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2635 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2636 disconnected = FALSE;
2640 * At this point, pending_scb is the scb associated with the
2641 * passed in command. That command is currently active on the
2642 * bus, is in the disconnected state, or we're hoping to find
2643 * a command for the same target active on the bus to abuse to
2644 * send a BDR. Queue the appropriate message based on which of
2645 * these states we are in.
2647 last_phase = ahc_inb(ahc, LASTPHASE);
2648 saved_scbptr = ahc_inb(ahc, SCBPTR);
2649 active_scb_index = ahc_inb(ahc, SCB_TAG);
2650 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2651 if (last_phase != P_BUSFREE
2652 && (pending_scb->hscb->tag == active_scb_index
2653 || (flag == SCB_DEVICE_RESET
2654 && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) {
2657 * We're active on the bus, so assert ATN
2658 * and hope that the target responds.
2660 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2661 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2662 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2663 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2664 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2665 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2668 } else if (disconnected) {
2671 * Actually re-queue this SCB in an attempt
2672 * to select the device before it reconnects.
2673 * In either case (selection or reselection),
2674 * we will now issue the approprate message
2675 * to the timed-out device.
2677 * Set the MK_MESSAGE control bit indicating
2678 * that we desire to send a message. We
2679 * also set the disconnected flag since
2680 * in the paging case there is no guarantee
2681 * that our SCB control byte matches the
2682 * version on the card. We don't want the
2683 * sequencer to abort the command thinking
2684 * an unsolicited reselection occurred.
2686 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2687 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2690 * Remove any cached copy of this SCB in the
2691 * disconnected list in preparation for the
2692 * queuing of our abort SCB. We use the
2693 * same element in the SCB, SCB_NEXT, for
2694 * both the qinfifo and the disconnected list.
2696 ahc_search_disc_list(ahc, cmd->device->id,
2697 cmd->device->channel + 'A',
2698 cmd->device->lun, pending_scb->hscb->tag,
2699 /*stop_on_first*/TRUE,
2701 /*save_state*/FALSE);
2704 * In the non-paging case, the sequencer will
2705 * never re-reference the in-core SCB.
2706 * To make sure we are notified during
2707 * reslection, set the MK_MESSAGE flag in
2708 * the card's copy of the SCB.
2710 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2711 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2712 ahc_outb(ahc, SCB_CONTROL,
2713 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2717 * Clear out any entries in the QINFIFO first
2718 * so we are the next SCB for this target
2721 ahc_search_qinfifo(ahc, cmd->device->id,
2722 cmd->device->channel + 'A',
2723 cmd->device->lun, SCB_LIST_NULL,
2724 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2726 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2727 ahc_outb(ahc, SCBPTR, saved_scbptr);
2728 ahc_print_path(ahc, pending_scb);
2729 printf("Device is disconnected, re-queuing SCB\n");
2732 printf("%s:%d:%d:%d: Unable to deliver message\n",
2733 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2741 * Our assumption is that if we don't have the command, no
2742 * recovery action was required, so we return success. Again,
2743 * the semantics of the mid-layer recovery engine are not
2744 * well defined, so this may change in time.
2751 struct timer_list timer;
2754 ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
2755 spin_unlock_irq(&ahc->platform_data->spin_lock);
2757 timer.data = (u_long)ahc;
2758 timer.expires = jiffies + (5 * HZ);
2759 timer.function = ahc_linux_sem_timeout;
2761 printf("Recovery code sleeping\n");
2762 down(&ahc->platform_data->eh_sem);
2763 printf("Recovery code awake\n");
2764 ret = del_timer_sync(&timer);
2766 printf("Timer Expired\n");
2769 spin_lock_irq(&ahc->platform_data->spin_lock);
2771 ahc_linux_run_complete_queue(ahc);
2776 ahc_platform_dump_card_state(struct ahc_softc *ahc)
2780 static void ahc_linux_exit(void);
2782 static void ahc_linux_get_width(struct scsi_target *starget)
2784 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2785 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2786 struct ahc_tmode_tstate *tstate;
2787 struct ahc_initiator_tinfo *tinfo
2788 = ahc_fetch_transinfo(ahc,
2789 starget->channel + 'A',
2790 shost->this_id, starget->id, &tstate);
2791 spi_width(starget) = tinfo->curr.width;
2794 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2796 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2797 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2798 struct ahc_devinfo devinfo;
2799 unsigned long flags;
2801 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2802 starget->channel + 'A', ROLE_INITIATOR);
2803 ahc_lock(ahc, &flags);
2804 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2805 ahc_unlock(ahc, &flags);
2808 static void ahc_linux_get_period(struct scsi_target *starget)
2810 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2811 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2812 struct ahc_tmode_tstate *tstate;
2813 struct ahc_initiator_tinfo *tinfo
2814 = ahc_fetch_transinfo(ahc,
2815 starget->channel + 'A',
2816 shost->this_id, starget->id, &tstate);
2817 spi_period(starget) = tinfo->curr.period;
2820 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2822 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2823 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2824 struct ahc_tmode_tstate *tstate;
2825 struct ahc_initiator_tinfo *tinfo
2826 = ahc_fetch_transinfo(ahc,
2827 starget->channel + 'A',
2828 shost->this_id, starget->id, &tstate);
2829 struct ahc_devinfo devinfo;
2830 unsigned int ppr_options = tinfo->curr.ppr_options;
2831 unsigned long flags;
2832 unsigned long offset = tinfo->curr.offset;
2833 struct ahc_syncrate *syncrate;
2836 offset = MAX_OFFSET;
2838 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2839 starget->channel + 'A', ROLE_INITIATOR);
2841 /* all PPR requests apart from QAS require wide transfers */
2842 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2843 ahc_linux_get_width(starget);
2844 if (spi_width(starget) == 0)
2845 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2848 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2849 ahc_lock(ahc, &flags);
2850 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2851 ppr_options, AHC_TRANS_GOAL, FALSE);
2852 ahc_unlock(ahc, &flags);
2855 static void ahc_linux_get_offset(struct scsi_target *starget)
2857 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2858 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2859 struct ahc_tmode_tstate *tstate;
2860 struct ahc_initiator_tinfo *tinfo
2861 = ahc_fetch_transinfo(ahc,
2862 starget->channel + 'A',
2863 shost->this_id, starget->id, &tstate);
2864 spi_offset(starget) = tinfo->curr.offset;
2867 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2869 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2870 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2871 struct ahc_tmode_tstate *tstate;
2872 struct ahc_initiator_tinfo *tinfo
2873 = ahc_fetch_transinfo(ahc,
2874 starget->channel + 'A',
2875 shost->this_id, starget->id, &tstate);
2876 struct ahc_devinfo devinfo;
2877 unsigned int ppr_options = 0;
2878 unsigned int period = 0;
2879 unsigned long flags;
2880 struct ahc_syncrate *syncrate = NULL;
2882 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2883 starget->channel + 'A', ROLE_INITIATOR);
2885 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2886 period = tinfo->curr.period;
2887 ppr_options = tinfo->curr.ppr_options;
2889 ahc_lock(ahc, &flags);
2890 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2891 ppr_options, AHC_TRANS_GOAL, FALSE);
2892 ahc_unlock(ahc, &flags);
2895 static void ahc_linux_get_dt(struct scsi_target *starget)
2897 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2898 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2899 struct ahc_tmode_tstate *tstate;
2900 struct ahc_initiator_tinfo *tinfo
2901 = ahc_fetch_transinfo(ahc,
2902 starget->channel + 'A',
2903 shost->this_id, starget->id, &tstate);
2904 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
2907 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2909 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2910 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2911 struct ahc_tmode_tstate *tstate;
2912 struct ahc_initiator_tinfo *tinfo
2913 = ahc_fetch_transinfo(ahc,
2914 starget->channel + 'A',
2915 shost->this_id, starget->id, &tstate);
2916 struct ahc_devinfo devinfo;
2917 unsigned int ppr_options = tinfo->curr.ppr_options
2918 & ~MSG_EXT_PPR_DT_REQ;
2919 unsigned int period = tinfo->curr.period;
2920 unsigned long flags;
2921 struct ahc_syncrate *syncrate;
2923 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2924 starget->channel + 'A', ROLE_INITIATOR);
2925 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
2926 ahc_lock(ahc, &flags);
2927 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
2928 ppr_options, AHC_TRANS_GOAL, FALSE);
2929 ahc_unlock(ahc, &flags);
2932 static void ahc_linux_get_qas(struct scsi_target *starget)
2934 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2935 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2936 struct ahc_tmode_tstate *tstate;
2937 struct ahc_initiator_tinfo *tinfo
2938 = ahc_fetch_transinfo(ahc,
2939 starget->channel + 'A',
2940 shost->this_id, starget->id, &tstate);
2941 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
2944 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2946 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2947 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2948 struct ahc_tmode_tstate *tstate;
2949 struct ahc_initiator_tinfo *tinfo
2950 = ahc_fetch_transinfo(ahc,
2951 starget->channel + 'A',
2952 shost->this_id, starget->id, &tstate);
2953 struct ahc_devinfo devinfo;
2954 unsigned int ppr_options = tinfo->curr.ppr_options
2955 & ~MSG_EXT_PPR_QAS_REQ;
2956 unsigned int period = tinfo->curr.period;
2957 unsigned long flags;
2958 struct ahc_syncrate *syncrate;
2961 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2963 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2964 starget->channel + 'A', ROLE_INITIATOR);
2965 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2966 ahc_lock(ahc, &flags);
2967 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
2968 ppr_options, AHC_TRANS_GOAL, FALSE);
2969 ahc_unlock(ahc, &flags);
2972 static void ahc_linux_get_iu(struct scsi_target *starget)
2974 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2975 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2976 struct ahc_tmode_tstate *tstate;
2977 struct ahc_initiator_tinfo *tinfo
2978 = ahc_fetch_transinfo(ahc,
2979 starget->channel + 'A',
2980 shost->this_id, starget->id, &tstate);
2981 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
2984 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2986 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2987 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2988 struct ahc_tmode_tstate *tstate;
2989 struct ahc_initiator_tinfo *tinfo
2990 = ahc_fetch_transinfo(ahc,
2991 starget->channel + 'A',
2992 shost->this_id, starget->id, &tstate);
2993 struct ahc_devinfo devinfo;
2994 unsigned int ppr_options = tinfo->curr.ppr_options
2995 & ~MSG_EXT_PPR_IU_REQ;
2996 unsigned int period = tinfo->curr.period;
2997 unsigned long flags;
2998 struct ahc_syncrate *syncrate;
3001 ppr_options |= MSG_EXT_PPR_IU_REQ;
3003 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
3004 starget->channel + 'A', ROLE_INITIATOR);
3005 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
3006 ahc_lock(ahc, &flags);
3007 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
3008 ppr_options, AHC_TRANS_GOAL, FALSE);
3009 ahc_unlock(ahc, &flags);
3012 static struct spi_function_template ahc_linux_transport_functions = {
3013 .get_offset = ahc_linux_get_offset,
3014 .set_offset = ahc_linux_set_offset,
3016 .get_period = ahc_linux_get_period,
3017 .set_period = ahc_linux_set_period,
3019 .get_width = ahc_linux_get_width,
3020 .set_width = ahc_linux_set_width,
3022 .get_dt = ahc_linux_get_dt,
3023 .set_dt = ahc_linux_set_dt,
3025 .get_iu = ahc_linux_get_iu,
3026 .set_iu = ahc_linux_set_iu,
3028 .get_qas = ahc_linux_get_qas,
3029 .set_qas = ahc_linux_set_qas,
3036 ahc_linux_init(void)
3038 ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions);
3039 if (!ahc_linux_transport_template)
3041 if (ahc_linux_detect(&aic7xxx_driver_template))
3043 spi_release_transport(ahc_linux_transport_template);
3049 ahc_linux_exit(void)
3051 ahc_linux_pci_exit();
3052 ahc_linux_eisa_exit();
3053 spi_release_transport(ahc_linux_transport_template);
3056 module_init(ahc_linux_init);
3057 module_exit(ahc_linux_exit);