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)
954 map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT);
958 * Although we can dma data above 4GB, our
959 * "consistent" memory is below 4GB for
960 * space efficiency reasons (only need a 4byte
961 * address). For this reason, we have to reset
962 * our dma mask when doing allocations.
964 if (ahc->dev_softc != NULL)
965 if (pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF)) {
966 printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
970 *vaddr = pci_alloc_consistent(ahc->dev_softc,
971 dmat->maxsize, &map->bus_addr);
972 if (ahc->dev_softc != NULL)
973 if (pci_set_dma_mask(ahc->dev_softc,
974 ahc->platform_data->hw_dma_mask)) {
975 printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n");
986 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
987 void* vaddr, bus_dmamap_t map)
989 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
990 vaddr, map->bus_addr);
994 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
995 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
996 void *cb_arg, int flags)
999 * Assume for now that this will only be used during
1000 * initialization and not for per-transaction buffer mapping.
1002 bus_dma_segment_t stack_sg;
1004 stack_sg.ds_addr = map->bus_addr;
1005 stack_sg.ds_len = dmat->maxsize;
1006 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
1011 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
1014 * The map may is NULL in our < 2.3.X implementation.
1015 * Now it's 2.6.5, but just in case...
1017 BUG_ON(map == NULL);
1018 free(map, M_DEVBUF);
1022 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
1028 /********************* Platform Dependent Functions ***************************/
1030 * Compare "left hand" softc with "right hand" softc, returning:
1031 * < 0 - lahc has a lower priority than rahc
1032 * 0 - Softcs are equal
1033 * > 0 - lahc has a higher priority than rahc
1036 ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
1043 * Under Linux, cards are ordered as follows:
1044 * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
1045 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
1046 * 3) All remaining VLB/EISA devices sorted by ioport.
1047 * 4) All remaining PCI devices sorted by bus/slot/func.
1049 value = (lahc->flags & AHC_BIOS_ENABLED)
1050 - (rahc->flags & AHC_BIOS_ENABLED);
1052 /* Controllers with BIOS enabled have a *higher* priority */
1056 * Same BIOS setting, now sort based on bus type.
1057 * EISA and VL controllers sort together. EISA/VL
1058 * have higher priority than PCI.
1060 rvalue = (rahc->chip & AHC_BUS_MASK);
1061 if (rvalue == AHC_VL)
1063 lvalue = (lahc->chip & AHC_BUS_MASK);
1064 if (lvalue == AHC_VL)
1066 value = rvalue - lvalue;
1070 /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
1075 char primary_channel;
1077 if (aic7xxx_reverse_scan != 0)
1078 value = ahc_get_pci_bus(lahc->dev_softc)
1079 - ahc_get_pci_bus(rahc->dev_softc);
1081 value = ahc_get_pci_bus(rahc->dev_softc)
1082 - ahc_get_pci_bus(lahc->dev_softc);
1085 if (aic7xxx_reverse_scan != 0)
1086 value = ahc_get_pci_slot(lahc->dev_softc)
1087 - ahc_get_pci_slot(rahc->dev_softc);
1089 value = ahc_get_pci_slot(rahc->dev_softc)
1090 - ahc_get_pci_slot(lahc->dev_softc);
1094 * On multi-function devices, the user can choose
1095 * to have function 1 probed before function 0.
1096 * Give whichever channel is the primary channel
1097 * the highest priority.
1099 primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
1101 if (lahc->channel == primary_channel)
1107 if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
1108 value = rahc->platform_data->bios_address
1109 - lahc->platform_data->bios_address;
1111 value = rahc->bsh.ioport
1116 panic("ahc_softc_sort: invalid bus type");
1122 ahc_linux_setup_tag_info_global(char *p)
1126 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1127 printf("Setting Global Tags= %d\n", tags);
1129 for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
1130 for (j = 0; j < AHC_NUM_TARGETS; j++) {
1131 aic7xxx_tag_info[i].tag_commands[j] = tags;
1137 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1140 if ((instance >= 0) && (targ >= 0)
1141 && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
1142 && (targ < AHC_NUM_TARGETS)) {
1143 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
1145 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1150 * Handle Linux boot parameters. This routine allows for assigning a value
1151 * to a parameter with a ':' between the parameter and the value.
1152 * ie. aic7xxx=stpwlev:1,extended
1155 aic7xxx_setup(char *s)
1165 { "extended", &aic7xxx_extended },
1166 { "no_reset", &aic7xxx_no_reset },
1167 { "verbose", &aic7xxx_verbose },
1168 { "allow_memio", &aic7xxx_allow_memio},
1170 { "debug", &ahc_debug },
1172 { "reverse_scan", &aic7xxx_reverse_scan },
1173 { "no_probe", &aic7xxx_probe_eisa_vl },
1174 { "probe_eisa_vl", &aic7xxx_probe_eisa_vl },
1175 { "periodic_otag", &aic7xxx_periodic_otag },
1176 { "pci_parity", &aic7xxx_pci_parity },
1177 { "seltime", &aic7xxx_seltime },
1178 { "tag_info", NULL },
1179 { "global_tag_depth", NULL },
1183 end = strchr(s, '\0');
1186 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1187 * will never be 0 in this case.
1191 while ((p = strsep(&s, ",.")) != NULL) {
1194 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1196 n = strlen(options[i].name);
1197 if (strncmp(options[i].name, p, n) == 0)
1200 if (i == NUM_ELEMENTS(options))
1203 if (strncmp(p, "global_tag_depth", n) == 0) {
1204 ahc_linux_setup_tag_info_global(p + n);
1205 } else if (strncmp(p, "tag_info", n) == 0) {
1206 s = aic_parse_brace_option("tag_info", p + n, end,
1207 2, ahc_linux_setup_tag_info, 0);
1208 } else if (p[n] == ':') {
1209 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1210 } else if (strncmp(p, "verbose", n) == 0) {
1211 *(options[i].flag) = 1;
1213 *(options[i].flag) ^= 0xFFFFFFFF;
1219 __setup("aic7xxx=", aic7xxx_setup);
1221 uint32_t aic7xxx_verbose;
1224 ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template)
1227 struct Scsi_Host *host;
1231 template->name = ahc->description;
1232 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1236 *((struct ahc_softc **)host->hostdata) = ahc;
1238 scsi_assign_lock(host, &ahc->platform_data->spin_lock);
1239 ahc->platform_data->host = host;
1240 host->can_queue = AHC_MAX_QUEUE;
1241 host->cmd_per_lun = 2;
1242 /* XXX No way to communicate the ID for multiple channels */
1243 host->this_id = ahc->our_id;
1244 host->irq = ahc->platform_data->irq;
1245 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1246 host->max_lun = AHC_NUM_LUNS;
1247 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1248 host->sg_tablesize = AHC_NSEG;
1249 ahc_set_unit(ahc, ahc_linux_next_unit());
1250 sprintf(buf, "scsi%d", host->host_no);
1251 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1252 if (new_name != NULL) {
1253 strcpy(new_name, buf);
1254 ahc_set_name(ahc, new_name);
1256 host->unique_id = ahc->unit;
1257 ahc_linux_initialize_scsi_bus(ahc);
1258 ahc_intr_enable(ahc, TRUE);
1259 ahc_unlock(ahc, &s);
1261 host->transportt = ahc_linux_transport_template;
1263 scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
1264 scsi_scan_host(host);
1269 ahc_linux_get_memsize(void)
1274 return ((uint64_t)si.totalram << PAGE_SHIFT);
1278 * Find the smallest available unit number to use
1279 * for a new device. We don't just use a static
1280 * count to handle the "repeated hot-(un)plug"
1284 ahc_linux_next_unit(void)
1286 struct ahc_softc *ahc;
1291 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
1292 if (ahc->unit == unit) {
1301 * Place the SCSI bus into a known state by either resetting it,
1302 * or forcing transfer negotiations on the next command to any
1306 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1314 if (aic7xxx_no_reset != 0)
1315 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1317 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1318 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1320 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1322 if ((ahc->features & AHC_TWIN) != 0) {
1324 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1325 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1334 * Force negotiation to async for all targets that
1335 * will not see an initial bus reset.
1337 for (; i < numtarg; i++) {
1338 struct ahc_devinfo devinfo;
1339 struct ahc_initiator_tinfo *tinfo;
1340 struct ahc_tmode_tstate *tstate;
1346 our_id = ahc->our_id;
1348 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1350 our_id = ahc->our_id_b;
1353 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1354 target_id, &tstate);
1355 ahc_compile_devinfo(&devinfo, our_id, target_id,
1356 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1357 ahc_update_neg_request(ahc, &devinfo, tstate,
1358 tinfo, AHC_NEG_ALWAYS);
1360 /* Give the bus some time to recover */
1361 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1362 ahc_linux_freeze_simq(ahc);
1363 init_timer(&ahc->platform_data->reset_timer);
1364 ahc->platform_data->reset_timer.data = (u_long)ahc;
1365 ahc->platform_data->reset_timer.expires =
1366 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
1367 ahc->platform_data->reset_timer.function =
1368 ahc_linux_release_simq;
1369 add_timer(&ahc->platform_data->reset_timer);
1374 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1377 ahc->platform_data =
1378 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1379 if (ahc->platform_data == NULL)
1381 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1382 TAILQ_INIT(&ahc->platform_data->completeq);
1383 TAILQ_INIT(&ahc->platform_data->device_runq);
1384 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1385 ahc->platform_data->hw_dma_mask = 0xFFFFFFFF;
1387 init_timer(&ahc->platform_data->completeq_timer);
1388 ahc->platform_data->completeq_timer.data = (u_long)ahc;
1389 ahc->platform_data->completeq_timer.function =
1390 (ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue;
1391 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
1392 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1393 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1394 if (aic7xxx_pci_parity == 0)
1395 ahc->flags |= AHC_DISABLE_PCI_PERR;
1401 ahc_platform_free(struct ahc_softc *ahc)
1403 struct ahc_linux_target *targ;
1404 struct ahc_linux_device *dev;
1407 if (ahc->platform_data != NULL) {
1408 del_timer_sync(&ahc->platform_data->completeq_timer);
1409 if (ahc->platform_data->host != NULL) {
1410 scsi_remove_host(ahc->platform_data->host);
1411 scsi_host_put(ahc->platform_data->host);
1414 /* destroy all of the device and target objects */
1415 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1416 targ = ahc->platform_data->targets[i];
1418 /* Keep target around through the loop. */
1420 for (j = 0; j < AHC_NUM_LUNS; j++) {
1422 if (targ->devices[j] == NULL)
1424 dev = targ->devices[j];
1425 ahc_linux_free_device(ahc, dev);
1428 * Forcibly free the target now that
1429 * all devices are gone.
1431 ahc_linux_free_target(ahc, targ);
1435 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1436 free_irq(ahc->platform_data->irq, ahc);
1437 if (ahc->tag == BUS_SPACE_PIO
1438 && ahc->bsh.ioport != 0)
1439 release_region(ahc->bsh.ioport, 256);
1440 if (ahc->tag == BUS_SPACE_MEMIO
1441 && ahc->bsh.maddr != NULL) {
1442 iounmap(ahc->bsh.maddr);
1443 release_mem_region(ahc->platform_data->mem_busaddr,
1447 free(ahc->platform_data, M_DEVBUF);
1452 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1454 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1455 SCB_GET_CHANNEL(ahc, scb),
1456 SCB_GET_LUN(scb), SCB_LIST_NULL,
1457 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1461 ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1464 struct ahc_linux_device *dev;
1468 dev = ahc_linux_get_device(ahc, devinfo->channel - 'A',
1470 devinfo->lun, /*alloc*/FALSE);
1473 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1476 case AHC_QUEUE_NONE:
1479 case AHC_QUEUE_BASIC:
1480 now_queuing = AHC_DEV_Q_BASIC;
1482 case AHC_QUEUE_TAGGED:
1483 now_queuing = AHC_DEV_Q_TAGGED;
1486 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1487 && (was_queuing != now_queuing)
1488 && (dev->active != 0)) {
1489 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1493 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1497 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1500 * Start out agressively and allow our
1501 * dynamic queue depth algorithm to take
1504 dev->maxtags = usertags;
1505 dev->openings = dev->maxtags - dev->active;
1507 if (dev->maxtags == 0) {
1509 * Queueing is disabled by the user.
1512 } else if (alg == AHC_QUEUE_TAGGED) {
1513 dev->flags |= AHC_DEV_Q_TAGGED;
1514 if (aic7xxx_periodic_otag != 0)
1515 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1517 dev->flags |= AHC_DEV_Q_BASIC;
1519 /* We can only have one opening. */
1521 dev->openings = 1 - dev->active;
1523 if (dev->scsi_device != NULL) {
1524 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1525 case AHC_DEV_Q_BASIC:
1526 scsi_adjust_queue_depth(dev->scsi_device,
1528 dev->openings + dev->active);
1530 case AHC_DEV_Q_TAGGED:
1531 scsi_adjust_queue_depth(dev->scsi_device,
1533 dev->openings + dev->active);
1537 * We allow the OS to queue 2 untagged transactions to
1538 * us at any time even though we can only execute them
1539 * serially on the controller/device. This should
1540 * remove some latency.
1542 scsi_adjust_queue_depth(dev->scsi_device,
1551 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1552 int lun, u_int tag, role_t role, uint32_t status)
1558 ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc)
1562 ahc_lock(ahc, &flags);
1563 del_timer(&ahc->platform_data->completeq_timer);
1564 ahc->platform_data->flags &= ~AHC_RUN_CMPLT_Q_TIMER;
1565 ahc_linux_run_complete_queue(ahc);
1566 ahc_unlock(ahc, &flags);
1570 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1572 static int warned_user;
1576 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1577 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
1578 if (warned_user == 0) {
1581 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1582 "aic7xxx: for installed controllers. Using defaults\n"
1583 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1584 "aic7xxx: the aic7xxx_osm..c source file.\n");
1587 tags = AHC_MAX_QUEUE;
1589 adapter_tag_info_t *tag_info;
1591 tag_info = &aic7xxx_tag_info[ahc->unit];
1592 tags = tag_info->tag_commands[devinfo->target_offset];
1593 if (tags > AHC_MAX_QUEUE)
1594 tags = AHC_MAX_QUEUE;
1601 * Determines the queue depth for a given device.
1604 ahc_linux_device_queue_depth(struct ahc_softc *ahc,
1605 struct ahc_linux_device *dev)
1607 struct ahc_devinfo devinfo;
1610 ahc_compile_devinfo(&devinfo,
1611 dev->target->channel == 0
1612 ? ahc->our_id : ahc->our_id_b,
1613 dev->target->target, dev->lun,
1614 dev->target->channel == 0 ? 'A' : 'B',
1616 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1618 && dev->scsi_device != NULL
1619 && dev->scsi_device->tagged_supported != 0) {
1621 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
1622 ahc_print_devinfo(ahc, &devinfo);
1623 printf("Tagged Queuing enabled. Depth %d\n", tags);
1625 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
1630 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1631 struct scsi_cmnd *cmd)
1634 struct hardware_scb *hscb;
1635 struct ahc_initiator_tinfo *tinfo;
1636 struct ahc_tmode_tstate *tstate;
1638 struct scb_tailq *untagged_q = NULL;
1641 * Schedule us to run later. The only reason we are not
1642 * running is because the whole controller Q is frozen.
1644 if (ahc->platform_data->qfrozen != 0)
1645 return SCSI_MLQUEUE_HOST_BUSY;
1648 * We only allow one untagged transaction
1649 * per target in the initiator role unless
1650 * we are storing a full busy target *lun*
1651 * table in SCB space.
1653 if (!blk_rq_tagged(cmd->request)
1654 && (ahc->features & AHC_SCB_BTT) == 0) {
1657 target_offset = cmd->device->id + cmd->device->channel * 8;
1658 untagged_q = &(ahc->untagged_queues[target_offset]);
1659 if (!TAILQ_EMPTY(untagged_q))
1660 /* if we're already executing an untagged command
1661 * we're busy to another */
1662 return SCSI_MLQUEUE_DEVICE_BUSY;
1666 * Get an scb to use.
1668 if ((scb = ahc_get_scb(ahc)) == NULL) {
1669 ahc->flags |= AHC_RESOURCE_SHORTAGE;
1670 return SCSI_MLQUEUE_HOST_BUSY;
1674 scb->platform_data->dev = dev;
1676 cmd->host_scribble = (char *)scb;
1679 * Fill out basics of the HSCB.
1682 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1683 hscb->lun = cmd->device->lun;
1684 mask = SCB_GET_TARGET_MASK(ahc, scb);
1685 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1686 SCB_GET_OUR_ID(scb),
1687 SCB_GET_TARGET(ahc, scb), &tstate);
1688 hscb->scsirate = tinfo->scsirate;
1689 hscb->scsioffset = tinfo->curr.offset;
1690 if ((tstate->ultraenb & mask) != 0)
1691 hscb->control |= ULTRAENB;
1693 if ((ahc->user_discenable & mask) != 0)
1694 hscb->control |= DISCENB;
1696 if ((tstate->auto_negotiate & mask) != 0) {
1697 scb->flags |= SCB_AUTO_NEGOTIATE;
1698 scb->hscb->control |= MK_MESSAGE;
1701 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1703 uint8_t tag_msgs[2];
1705 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1706 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1707 hscb->control |= tag_msgs[0];
1708 if (tag_msgs[0] == MSG_ORDERED_TASK)
1709 dev->commands_since_idle_or_otag = 0;
1710 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1711 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1712 hscb->control |= MSG_ORDERED_TASK;
1713 dev->commands_since_idle_or_otag = 0;
1715 hscb->control |= MSG_SIMPLE_TASK;
1719 hscb->cdb_len = cmd->cmd_len;
1720 if (hscb->cdb_len <= 12) {
1721 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1723 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1724 scb->flags |= SCB_CDB32_PTR;
1727 scb->platform_data->xfer_len = 0;
1728 ahc_set_residual(scb, 0);
1729 ahc_set_sense_residual(scb, 0);
1731 if (cmd->use_sg != 0) {
1732 struct ahc_dma_seg *sg;
1733 struct scatterlist *cur_seg;
1734 struct scatterlist *end_seg;
1737 cur_seg = (struct scatterlist *)cmd->request_buffer;
1738 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
1739 cmd->sc_data_direction);
1740 end_seg = cur_seg + nseg;
1741 /* Copy the segments into the SG list. */
1744 * The sg_count may be larger than nseg if
1745 * a transfer crosses a 32bit page.
1747 while (cur_seg < end_seg) {
1752 addr = sg_dma_address(cur_seg);
1753 len = sg_dma_len(cur_seg);
1754 consumed = ahc_linux_map_seg(ahc, scb,
1757 scb->sg_count += consumed;
1761 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1764 * Reset the sg list pointer.
1767 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1770 * Copy the first SG into the "current"
1771 * data pointer area.
1773 scb->hscb->dataptr = scb->sg_list->addr;
1774 scb->hscb->datacnt = scb->sg_list->len;
1775 } else if (cmd->request_bufflen != 0) {
1776 struct ahc_dma_seg *sg;
1780 addr = pci_map_single(ahc->dev_softc,
1781 cmd->request_buffer,
1782 cmd->request_bufflen,
1783 cmd->sc_data_direction);
1784 scb->platform_data->buf_busaddr = addr;
1785 scb->sg_count = ahc_linux_map_seg(ahc, scb,
1787 cmd->request_bufflen);
1788 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1791 * Reset the sg list pointer.
1794 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1797 * Copy the first SG into the "current"
1798 * data pointer area.
1800 scb->hscb->dataptr = sg->addr;
1801 scb->hscb->datacnt = sg->len;
1803 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1804 scb->hscb->dataptr = 0;
1805 scb->hscb->datacnt = 0;
1809 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1812 dev->commands_issued++;
1813 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1814 dev->commands_since_idle_or_otag++;
1816 scb->flags |= SCB_ACTIVE;
1818 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1819 scb->flags |= SCB_UNTAGGEDQ;
1821 ahc_queue_scb(ahc, scb);
1826 * SCSI controller interrupt handler.
1829 ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1831 struct ahc_softc *ahc;
1835 ahc = (struct ahc_softc *) dev_id;
1836 ahc_lock(ahc, &flags);
1837 ours = ahc_intr(ahc);
1838 ahc_linux_run_complete_queue(ahc);
1839 ahc_unlock(ahc, &flags);
1840 return IRQ_RETVAL(ours);
1844 ahc_platform_flushwork(struct ahc_softc *ahc)
1847 while (ahc_linux_run_complete_queue(ahc) != NULL)
1851 static struct ahc_linux_target*
1852 ahc_linux_alloc_target(struct ahc_softc *ahc, u_int channel, u_int target)
1854 struct ahc_linux_target *targ;
1855 u_int target_offset;
1857 target_offset = target;
1861 targ = malloc(sizeof(*targ), M_DEVBUG, M_NOWAIT);
1864 memset(targ, 0, sizeof(*targ));
1865 targ->channel = channel;
1866 targ->target = target;
1868 ahc->platform_data->targets[target_offset] = targ;
1873 ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ)
1875 struct ahc_devinfo devinfo;
1876 struct ahc_initiator_tinfo *tinfo;
1877 struct ahc_tmode_tstate *tstate;
1879 u_int target_offset;
1883 * Force a negotiation to async/narrow on any
1884 * future command to this device unless a bus
1885 * reset occurs between now and that command.
1887 channel = 'A' + targ->channel;
1888 our_id = ahc->our_id;
1889 target_offset = targ->target;
1890 if (targ->channel != 0) {
1892 our_id = ahc->our_id_b;
1894 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1895 targ->target, &tstate);
1896 ahc_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD,
1897 channel, ROLE_INITIATOR);
1898 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
1899 AHC_TRANS_GOAL, /*paused*/FALSE);
1900 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
1901 AHC_TRANS_GOAL, /*paused*/FALSE);
1902 ahc_update_neg_request(ahc, &devinfo, tstate, tinfo, AHC_NEG_ALWAYS);
1903 ahc->platform_data->targets[target_offset] = NULL;
1904 free(targ, M_DEVBUF);
1907 static struct ahc_linux_device*
1908 ahc_linux_alloc_device(struct ahc_softc *ahc,
1909 struct ahc_linux_target *targ, u_int lun)
1911 struct ahc_linux_device *dev;
1913 dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
1916 memset(dev, 0, sizeof(*dev));
1917 init_timer(&dev->timer);
1918 dev->flags = AHC_DEV_UNCONFIGURED;
1923 * We start out life using untagged
1924 * transactions of which we allow one.
1929 * Set maxtags to 0. This will be changed if we
1930 * later determine that we are dealing with
1931 * a tagged queuing capable device.
1936 targ->devices[lun] = dev;
1941 __ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
1943 struct ahc_linux_target *targ;
1946 targ->devices[dev->lun] = NULL;
1947 free(dev, M_DEVBUF);
1949 if (targ->refcount == 0)
1950 ahc_linux_free_target(ahc, targ);
1954 ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
1956 del_timer_sync(&dev->timer);
1957 __ahc_linux_free_device(ahc, dev);
1961 ahc_send_async(struct ahc_softc *ahc, char channel,
1962 u_int target, u_int lun, ac_code code, void *arg)
1965 case AC_TRANSFER_NEG:
1968 struct ahc_linux_target *targ;
1969 struct info_str info;
1970 struct ahc_initiator_tinfo *tinfo;
1971 struct ahc_tmode_tstate *tstate;
1975 info.length = sizeof(buf);
1978 tinfo = ahc_fetch_transinfo(ahc, channel,
1979 channel == 'A' ? ahc->our_id
1984 * Don't bother reporting results while
1985 * negotiations are still pending.
1987 if (tinfo->curr.period != tinfo->goal.period
1988 || tinfo->curr.width != tinfo->goal.width
1989 || tinfo->curr.offset != tinfo->goal.offset
1990 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1991 if (bootverbose == 0)
1995 * Don't bother reporting results that
1996 * are identical to those last reported.
1998 target_offset = target;
2001 targ = ahc->platform_data->targets[target_offset];
2004 if (tinfo->curr.period == targ->last_tinfo.period
2005 && tinfo->curr.width == targ->last_tinfo.width
2006 && tinfo->curr.offset == targ->last_tinfo.offset
2007 && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
2008 if (bootverbose == 0)
2011 targ->last_tinfo.period = tinfo->curr.period;
2012 targ->last_tinfo.width = tinfo->curr.width;
2013 targ->last_tinfo.offset = tinfo->curr.offset;
2014 targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
2016 printf("(%s:%c:", ahc_name(ahc), channel);
2017 if (target == CAM_TARGET_WILDCARD)
2020 printf("%d): ", target);
2021 ahc_format_transinfo(&info, &tinfo->curr);
2022 if (info.pos < info.length)
2023 *info.buffer = '\0';
2025 buf[info.length - 1] = '\0';
2031 WARN_ON(lun != CAM_LUN_WILDCARD);
2032 scsi_report_device_reset(ahc->platform_data->host,
2033 channel - 'A', target);
2037 if (ahc->platform_data->host != NULL) {
2038 scsi_report_bus_reset(ahc->platform_data->host,
2043 panic("ahc_send_async: Unexpected async event");
2048 * Calls the higher level scsi done function and frees the scb.
2051 ahc_done(struct ahc_softc *ahc, struct scb *scb)
2054 struct ahc_linux_device *dev;
2056 LIST_REMOVE(scb, pending_links);
2057 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
2058 struct scb_tailq *untagged_q;
2061 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
2062 untagged_q = &(ahc->untagged_queues[target_offset]);
2063 TAILQ_REMOVE(untagged_q, scb, links.tqe);
2064 BUG_ON(!TAILQ_EMPTY(untagged_q));
2067 if ((scb->flags & SCB_ACTIVE) == 0) {
2068 printf("SCB %d done'd twice\n", scb->hscb->tag);
2069 ahc_dump_card_state(ahc);
2070 panic("Stopping for safety");
2073 dev = scb->platform_data->dev;
2076 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
2077 cmd->result &= ~(CAM_DEV_QFRZN << 16);
2080 ahc_linux_unmap_scb(ahc, scb);
2083 * Guard against stale sense data.
2084 * The Linux mid-layer assumes that sense
2085 * was retrieved anytime the first byte of
2086 * the sense buffer looks "sane".
2088 cmd->sense_buffer[0] = 0;
2089 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
2090 uint32_t amount_xferred;
2093 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
2094 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
2096 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
2097 ahc_print_path(ahc, scb);
2098 printf("Set CAM_UNCOR_PARITY\n");
2101 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
2102 #ifdef AHC_REPORT_UNDERFLOWS
2104 * This code is disabled by default as some
2105 * clients of the SCSI system do not properly
2106 * initialize the underflow parameter. This
2107 * results in spurious termination of commands
2108 * that complete as expected (e.g. underflow is
2109 * allowed as command can return variable amounts
2112 } else if (amount_xferred < scb->io_ctx->underflow) {
2115 ahc_print_path(ahc, scb);
2117 for (i = 0; i < scb->io_ctx->cmd_len; i++)
2118 printf(" 0x%x", scb->io_ctx->cmnd[i]);
2120 ahc_print_path(ahc, scb);
2121 printf("Saw underflow (%ld of %ld bytes). "
2122 "Treated as error\n",
2123 ahc_get_residual(scb),
2124 ahc_get_transfer_length(scb));
2125 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
2128 ahc_set_transaction_status(scb, CAM_REQ_CMP);
2130 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
2131 ahc_linux_handle_scsi_status(ahc, dev, scb);
2132 } else if (ahc_get_transaction_status(scb) == CAM_SEL_TIMEOUT) {
2133 dev->flags |= AHC_DEV_UNCONFIGURED;
2136 if (dev->openings == 1
2137 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
2138 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
2139 dev->tag_success_count++;
2141 * Some devices deal with temporary internal resource
2142 * shortages by returning queue full. When the queue
2143 * full occurrs, we throttle back. Slowly try to get
2144 * back to our previous queue depth.
2146 if ((dev->openings + dev->active) < dev->maxtags
2147 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
2148 dev->tag_success_count = 0;
2152 if (dev->active == 0)
2153 dev->commands_since_idle_or_otag = 0;
2155 if ((dev->flags & AHC_DEV_UNCONFIGURED) != 0
2157 && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0)
2158 ahc_linux_free_device(ahc, dev);
2159 else if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) {
2160 TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links);
2161 dev->flags |= AHC_DEV_ON_RUN_LIST;
2164 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
2165 printf("Recovery SCB completes\n");
2166 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
2167 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
2168 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
2169 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2170 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2171 up(&ahc->platform_data->eh_sem);
2175 ahc_free_scb(ahc, scb);
2176 ahc_linux_queue_cmd_complete(ahc, cmd);
2180 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
2181 struct ahc_linux_device *dev, struct scb *scb)
2183 struct ahc_devinfo devinfo;
2185 ahc_compile_devinfo(&devinfo,
2187 dev->target->target, dev->lun,
2188 dev->target->channel == 0 ? 'A' : 'B',
2192 * We don't currently trust the mid-layer to
2193 * properly deal with queue full or busy. So,
2194 * when one occurs, we tell the mid-layer to
2195 * unconditionally requeue the command to us
2196 * so that we can retry it ourselves. We also
2197 * implement our own throttling mechanism so
2198 * we don't clobber the device with too many
2201 switch (ahc_get_scsi_status(scb)) {
2204 case SCSI_STATUS_CHECK_COND:
2205 case SCSI_STATUS_CMD_TERMINATED:
2210 * Copy sense information to the OS's cmd
2211 * structure if it is available.
2214 if (scb->flags & SCB_SENSE) {
2217 sense_size = MIN(sizeof(struct scsi_sense_data)
2218 - ahc_get_sense_residual(scb),
2219 sizeof(cmd->sense_buffer));
2220 memcpy(cmd->sense_buffer,
2221 ahc_get_sense_buf(ahc, scb), sense_size);
2222 if (sense_size < sizeof(cmd->sense_buffer))
2223 memset(&cmd->sense_buffer[sense_size], 0,
2224 sizeof(cmd->sense_buffer) - sense_size);
2225 cmd->result |= (DRIVER_SENSE << 24);
2227 if (ahc_debug & AHC_SHOW_SENSE) {
2230 printf("Copied %d bytes of sense data:",
2232 for (i = 0; i < sense_size; i++) {
2235 printf("0x%x ", cmd->sense_buffer[i]);
2243 case SCSI_STATUS_QUEUE_FULL:
2246 * By the time the core driver has returned this
2247 * command, all other commands that were queued
2248 * to us but not the device have been returned.
2249 * This ensures that dev->active is equal to
2250 * the number of commands actually queued to
2253 dev->tag_success_count = 0;
2254 if (dev->active != 0) {
2256 * Drop our opening count to the number
2257 * of commands currently outstanding.
2261 ahc_print_path(ahc, scb);
2262 printf("Dropping tag count to %d\n", dev->active);
2264 if (dev->active == dev->tags_on_last_queuefull) {
2266 dev->last_queuefull_same_count++;
2268 * If we repeatedly see a queue full
2269 * at the same queue depth, this
2270 * device has a fixed number of tag
2271 * slots. Lock in this tag depth
2272 * so we stop seeing queue fulls from
2275 if (dev->last_queuefull_same_count
2276 == AHC_LOCK_TAGS_COUNT) {
2277 dev->maxtags = dev->active;
2278 ahc_print_path(ahc, scb);
2279 printf("Locking max tag count at %d\n",
2283 dev->tags_on_last_queuefull = dev->active;
2284 dev->last_queuefull_same_count = 0;
2286 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
2287 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
2288 ahc_platform_set_tags(ahc, &devinfo,
2289 (dev->flags & AHC_DEV_Q_BASIC)
2290 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
2294 * Drop down to a single opening, and treat this
2295 * as if the target returned BUSY SCSI status.
2298 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
2299 ahc_platform_set_tags(ahc, &devinfo,
2300 (dev->flags & AHC_DEV_Q_BASIC)
2301 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
2304 case SCSI_STATUS_BUSY:
2307 * Set a short timer to defer sending commands for
2308 * a bit since Linux will not delay in this case.
2310 if ((dev->flags & AHC_DEV_TIMER_ACTIVE) != 0) {
2311 printf("%s:%c:%d: Device Timer still active during "
2312 "busy processing\n", ahc_name(ahc),
2313 dev->target->channel, dev->target->target);
2316 dev->flags |= AHC_DEV_TIMER_ACTIVE;
2318 init_timer(&dev->timer);
2319 dev->timer.data = (u_long)dev;
2320 dev->timer.expires = jiffies + (HZ/2);
2321 dev->timer.function = ahc_linux_dev_timed_unfreeze;
2322 add_timer(&dev->timer);
2329 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd)
2332 * Typically, the complete queue has very few entries
2333 * queued to it before the queue is emptied by
2334 * ahc_linux_run_complete_queue, so sorting the entries
2335 * by generation number should be inexpensive.
2336 * We perform the sort so that commands that complete
2337 * with an error are retuned in the order origionally
2338 * queued to the controller so that any subsequent retries
2339 * are performed in order. The underlying ahc routines do
2340 * not guarantee the order that aborted commands will be
2343 struct ahc_completeq *completeq;
2344 struct ahc_cmd *list_cmd;
2345 struct ahc_cmd *acmd;
2348 * Map CAM error codes into Linux Error codes. We
2349 * avoid the conversion so that the DV code has the
2350 * full error information available when making
2351 * state change decisions.
2356 switch (ahc_cmd_get_transaction_status(cmd)) {
2357 case CAM_REQ_INPROG:
2359 case CAM_SCSI_STATUS_ERROR:
2360 new_status = DID_OK;
2362 case CAM_REQ_ABORTED:
2363 new_status = DID_ABORT;
2366 new_status = DID_BUS_BUSY;
2368 case CAM_REQ_INVALID:
2369 case CAM_PATH_INVALID:
2370 new_status = DID_BAD_TARGET;
2372 case CAM_SEL_TIMEOUT:
2373 new_status = DID_NO_CONNECT;
2375 case CAM_SCSI_BUS_RESET:
2377 new_status = DID_RESET;
2379 case CAM_UNCOR_PARITY:
2380 new_status = DID_PARITY;
2382 case CAM_CMD_TIMEOUT:
2383 new_status = DID_TIME_OUT;
2386 case CAM_REQ_CMP_ERR:
2387 case CAM_AUTOSENSE_FAIL:
2389 case CAM_DATA_RUN_ERR:
2390 case CAM_UNEXP_BUSFREE:
2391 case CAM_SEQUENCE_FAIL:
2392 case CAM_CCB_LEN_ERR:
2393 case CAM_PROVIDE_FAIL:
2394 case CAM_REQ_TERMIO:
2395 case CAM_UNREC_HBA_ERROR:
2396 case CAM_REQ_TOO_BIG:
2397 new_status = DID_ERROR;
2399 case CAM_REQUEUE_REQ:
2401 * If we want the request requeued, make sure there
2402 * are sufficent retries. In the old scsi error code,
2403 * we used to be able to specify a result code that
2404 * bypassed the retry count. Now we must use this
2405 * hack. We also "fake" a check condition with
2406 * a sense code of ABORTED COMMAND. This seems to
2407 * evoke a retry even if this command is being sent
2408 * via the eh thread. Ick! Ick! Ick!
2410 if (cmd->retries > 0)
2412 new_status = DID_OK;
2413 ahc_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND);
2414 cmd->result |= (DRIVER_SENSE << 24);
2415 memset(cmd->sense_buffer, 0,
2416 sizeof(cmd->sense_buffer));
2417 cmd->sense_buffer[0] = SSD_ERRCODE_VALID
2418 | SSD_CURRENT_ERROR;
2419 cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND;
2422 /* We should never get here */
2423 new_status = DID_ERROR;
2427 ahc_cmd_set_transaction_status(cmd, new_status);
2430 completeq = &ahc->platform_data->completeq;
2431 list_cmd = TAILQ_FIRST(completeq);
2432 acmd = (struct ahc_cmd *)cmd;
2433 while (list_cmd != NULL
2434 && acmd_scsi_cmd(list_cmd).serial_number
2435 < acmd_scsi_cmd(acmd).serial_number)
2436 list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe);
2437 if (list_cmd != NULL)
2438 TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe);
2440 TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe);
2444 ahc_linux_sem_timeout(u_long arg)
2446 struct ahc_softc *ahc;
2449 ahc = (struct ahc_softc *)arg;
2452 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2453 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2454 up(&ahc->platform_data->eh_sem);
2456 ahc_unlock(ahc, &s);
2460 ahc_linux_freeze_simq(struct ahc_softc *ahc)
2462 ahc->platform_data->qfrozen++;
2463 if (ahc->platform_data->qfrozen == 1) {
2464 scsi_block_requests(ahc->platform_data->host);
2466 /* XXX What about Twin channels? */
2467 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2468 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2469 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2474 ahc_linux_release_simq(u_long arg)
2476 struct ahc_softc *ahc;
2480 ahc = (struct ahc_softc *)arg;
2484 if (ahc->platform_data->qfrozen > 0)
2485 ahc->platform_data->qfrozen--;
2486 if (ahc->platform_data->qfrozen == 0)
2488 ahc_unlock(ahc, &s);
2490 * There is still a race here. The mid-layer
2491 * should keep its own freeze count and use
2492 * a bottom half handler to run the queues
2493 * so we can unblock with our own lock held.
2496 scsi_unblock_requests(ahc->platform_data->host);
2500 ahc_linux_dev_timed_unfreeze(u_long arg)
2502 struct ahc_linux_device *dev;
2503 struct ahc_softc *ahc;
2506 dev = (struct ahc_linux_device *)arg;
2507 ahc = dev->target->ahc;
2509 dev->flags &= ~AHC_DEV_TIMER_ACTIVE;
2510 if (dev->qfrozen > 0)
2512 if (dev->active == 0)
2513 __ahc_linux_free_device(ahc, dev);
2514 ahc_unlock(ahc, &s);
2518 ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag)
2520 struct ahc_softc *ahc;
2521 struct ahc_linux_device *dev;
2522 struct scb *pending_scb;
2524 u_int active_scb_index;
2537 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2539 printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
2540 ahc_name(ahc), cmd->device->channel,
2541 cmd->device->id, cmd->device->lun,
2542 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2545 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2546 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2550 * First determine if we currently own this command.
2551 * Start by searching the device queue. If not found
2552 * there, check the pending_scb list. If not found
2553 * at all, and the system wanted us to just abort the
2554 * command, return success.
2556 dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
2557 cmd->device->lun, /*alloc*/FALSE);
2561 * No target device for this command exists,
2562 * so we must not still own the command.
2564 printf("%s:%d:%d:%d: Is not an active device\n",
2565 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2571 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2572 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2573 cmd->device->channel + 'A',
2575 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2576 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2577 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2584 * See if we can find a matching cmd in the pending list.
2586 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2587 if (pending_scb->io_ctx == cmd)
2591 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2593 /* Any SCB for this device will do for a target reset */
2594 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2595 if (ahc_match_scb(ahc, pending_scb, cmd->device->id,
2596 cmd->device->channel + 'A',
2598 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2603 if (pending_scb == NULL) {
2604 printf("%s:%d:%d:%d: Command not found\n",
2605 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2610 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2612 * We can't queue two recovery actions using the same SCB
2619 * Ensure that the card doesn't do anything
2620 * behind our back and that we didn't "just" miss
2621 * an interrupt that would affect this cmd.
2623 was_paused = ahc_is_paused(ahc);
2624 ahc_pause_and_flushwork(ahc);
2627 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2628 printf("%s:%d:%d:%d: Command already completed\n",
2629 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2634 printf("%s: At time of recovery, card was %spaused\n",
2635 ahc_name(ahc), was_paused ? "" : "not ");
2636 ahc_dump_card_state(ahc);
2638 disconnected = TRUE;
2639 if (flag == SCB_ABORT) {
2640 if (ahc_search_qinfifo(ahc, cmd->device->id,
2641 cmd->device->channel + 'A',
2643 pending_scb->hscb->tag,
2644 ROLE_INITIATOR, CAM_REQ_ABORTED,
2645 SEARCH_COMPLETE) > 0) {
2646 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2647 ahc_name(ahc), cmd->device->channel,
2648 cmd->device->id, cmd->device->lun);
2652 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2653 cmd->device->channel + 'A',
2654 cmd->device->lun, pending_scb->hscb->tag,
2655 ROLE_INITIATOR, /*status*/0,
2656 SEARCH_COUNT) > 0) {
2657 disconnected = FALSE;
2660 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2661 struct scb *bus_scb;
2663 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2664 if (bus_scb == pending_scb)
2665 disconnected = FALSE;
2666 else if (flag != SCB_ABORT
2667 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2668 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2669 disconnected = FALSE;
2673 * At this point, pending_scb is the scb associated with the
2674 * passed in command. That command is currently active on the
2675 * bus, is in the disconnected state, or we're hoping to find
2676 * a command for the same target active on the bus to abuse to
2677 * send a BDR. Queue the appropriate message based on which of
2678 * these states we are in.
2680 last_phase = ahc_inb(ahc, LASTPHASE);
2681 saved_scbptr = ahc_inb(ahc, SCBPTR);
2682 active_scb_index = ahc_inb(ahc, SCB_TAG);
2683 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2684 if (last_phase != P_BUSFREE
2685 && (pending_scb->hscb->tag == active_scb_index
2686 || (flag == SCB_DEVICE_RESET
2687 && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) {
2690 * We're active on the bus, so assert ATN
2691 * and hope that the target responds.
2693 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2694 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2695 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2696 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2697 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2698 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2701 } else if (disconnected) {
2704 * Actually re-queue this SCB in an attempt
2705 * to select the device before it reconnects.
2706 * In either case (selection or reselection),
2707 * we will now issue the approprate message
2708 * to the timed-out device.
2710 * Set the MK_MESSAGE control bit indicating
2711 * that we desire to send a message. We
2712 * also set the disconnected flag since
2713 * in the paging case there is no guarantee
2714 * that our SCB control byte matches the
2715 * version on the card. We don't want the
2716 * sequencer to abort the command thinking
2717 * an unsolicited reselection occurred.
2719 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2720 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2723 * Remove any cached copy of this SCB in the
2724 * disconnected list in preparation for the
2725 * queuing of our abort SCB. We use the
2726 * same element in the SCB, SCB_NEXT, for
2727 * both the qinfifo and the disconnected list.
2729 ahc_search_disc_list(ahc, cmd->device->id,
2730 cmd->device->channel + 'A',
2731 cmd->device->lun, pending_scb->hscb->tag,
2732 /*stop_on_first*/TRUE,
2734 /*save_state*/FALSE);
2737 * In the non-paging case, the sequencer will
2738 * never re-reference the in-core SCB.
2739 * To make sure we are notified during
2740 * reslection, set the MK_MESSAGE flag in
2741 * the card's copy of the SCB.
2743 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2744 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2745 ahc_outb(ahc, SCB_CONTROL,
2746 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2750 * Clear out any entries in the QINFIFO first
2751 * so we are the next SCB for this target
2754 ahc_search_qinfifo(ahc, cmd->device->id,
2755 cmd->device->channel + 'A',
2756 cmd->device->lun, SCB_LIST_NULL,
2757 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2759 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2760 ahc_outb(ahc, SCBPTR, saved_scbptr);
2761 ahc_print_path(ahc, pending_scb);
2762 printf("Device is disconnected, re-queuing SCB\n");
2765 printf("%s:%d:%d:%d: Unable to deliver message\n",
2766 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2774 * Our assumption is that if we don't have the command, no
2775 * recovery action was required, so we return success. Again,
2776 * the semantics of the mid-layer recovery engine are not
2777 * well defined, so this may change in time.
2784 struct timer_list timer;
2787 ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
2788 spin_unlock_irq(&ahc->platform_data->spin_lock);
2790 timer.data = (u_long)ahc;
2791 timer.expires = jiffies + (5 * HZ);
2792 timer.function = ahc_linux_sem_timeout;
2794 printf("Recovery code sleeping\n");
2795 down(&ahc->platform_data->eh_sem);
2796 printf("Recovery code awake\n");
2797 ret = del_timer_sync(&timer);
2799 printf("Timer Expired\n");
2802 spin_lock_irq(&ahc->platform_data->spin_lock);
2804 ahc_linux_run_complete_queue(ahc);
2809 ahc_platform_dump_card_state(struct ahc_softc *ahc)
2813 static void ahc_linux_exit(void);
2815 static void ahc_linux_get_width(struct scsi_target *starget)
2817 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2818 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2819 struct ahc_tmode_tstate *tstate;
2820 struct ahc_initiator_tinfo *tinfo
2821 = ahc_fetch_transinfo(ahc,
2822 starget->channel + 'A',
2823 shost->this_id, starget->id, &tstate);
2824 spi_width(starget) = tinfo->curr.width;
2827 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2829 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2830 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2831 struct ahc_devinfo devinfo;
2832 unsigned long flags;
2834 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2835 starget->channel + 'A', ROLE_INITIATOR);
2836 ahc_lock(ahc, &flags);
2837 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2838 ahc_unlock(ahc, &flags);
2841 static void ahc_linux_get_period(struct scsi_target *starget)
2843 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2844 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2845 struct ahc_tmode_tstate *tstate;
2846 struct ahc_initiator_tinfo *tinfo
2847 = ahc_fetch_transinfo(ahc,
2848 starget->channel + 'A',
2849 shost->this_id, starget->id, &tstate);
2850 spi_period(starget) = tinfo->curr.period;
2853 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2855 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2856 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2857 struct ahc_tmode_tstate *tstate;
2858 struct ahc_initiator_tinfo *tinfo
2859 = ahc_fetch_transinfo(ahc,
2860 starget->channel + 'A',
2861 shost->this_id, starget->id, &tstate);
2862 struct ahc_devinfo devinfo;
2863 unsigned int ppr_options = tinfo->curr.ppr_options;
2864 unsigned long flags;
2865 unsigned long offset = tinfo->curr.offset;
2866 struct ahc_syncrate *syncrate;
2869 offset = MAX_OFFSET;
2871 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2872 starget->channel + 'A', ROLE_INITIATOR);
2874 /* all PPR requests apart from QAS require wide transfers */
2875 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2876 ahc_linux_get_width(starget);
2877 if (spi_width(starget) == 0)
2878 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2881 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2882 ahc_lock(ahc, &flags);
2883 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2884 ppr_options, AHC_TRANS_GOAL, FALSE);
2885 ahc_unlock(ahc, &flags);
2888 static void ahc_linux_get_offset(struct scsi_target *starget)
2890 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2891 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2892 struct ahc_tmode_tstate *tstate;
2893 struct ahc_initiator_tinfo *tinfo
2894 = ahc_fetch_transinfo(ahc,
2895 starget->channel + 'A',
2896 shost->this_id, starget->id, &tstate);
2897 spi_offset(starget) = tinfo->curr.offset;
2900 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2902 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2903 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2904 struct ahc_tmode_tstate *tstate;
2905 struct ahc_initiator_tinfo *tinfo
2906 = ahc_fetch_transinfo(ahc,
2907 starget->channel + 'A',
2908 shost->this_id, starget->id, &tstate);
2909 struct ahc_devinfo devinfo;
2910 unsigned int ppr_options = 0;
2911 unsigned int period = 0;
2912 unsigned long flags;
2913 struct ahc_syncrate *syncrate = NULL;
2915 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2916 starget->channel + 'A', ROLE_INITIATOR);
2918 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2919 period = tinfo->curr.period;
2920 ppr_options = tinfo->curr.ppr_options;
2922 ahc_lock(ahc, &flags);
2923 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2924 ppr_options, AHC_TRANS_GOAL, FALSE);
2925 ahc_unlock(ahc, &flags);
2928 static void ahc_linux_get_dt(struct scsi_target *starget)
2930 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2931 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2932 struct ahc_tmode_tstate *tstate;
2933 struct ahc_initiator_tinfo *tinfo
2934 = ahc_fetch_transinfo(ahc,
2935 starget->channel + 'A',
2936 shost->this_id, starget->id, &tstate);
2937 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
2940 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2942 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2943 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2944 struct ahc_tmode_tstate *tstate;
2945 struct ahc_initiator_tinfo *tinfo
2946 = ahc_fetch_transinfo(ahc,
2947 starget->channel + 'A',
2948 shost->this_id, starget->id, &tstate);
2949 struct ahc_devinfo devinfo;
2950 unsigned int ppr_options = tinfo->curr.ppr_options
2951 & ~MSG_EXT_PPR_DT_REQ;
2952 unsigned int period = tinfo->curr.period;
2953 unsigned long flags;
2954 struct ahc_syncrate *syncrate;
2956 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2957 starget->channel + 'A', ROLE_INITIATOR);
2958 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
2959 ahc_lock(ahc, &flags);
2960 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
2961 ppr_options, AHC_TRANS_GOAL, FALSE);
2962 ahc_unlock(ahc, &flags);
2965 static void ahc_linux_get_qas(struct scsi_target *starget)
2967 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2968 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2969 struct ahc_tmode_tstate *tstate;
2970 struct ahc_initiator_tinfo *tinfo
2971 = ahc_fetch_transinfo(ahc,
2972 starget->channel + 'A',
2973 shost->this_id, starget->id, &tstate);
2974 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
2977 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2979 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2980 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2981 struct ahc_tmode_tstate *tstate;
2982 struct ahc_initiator_tinfo *tinfo
2983 = ahc_fetch_transinfo(ahc,
2984 starget->channel + 'A',
2985 shost->this_id, starget->id, &tstate);
2986 struct ahc_devinfo devinfo;
2987 unsigned int ppr_options = tinfo->curr.ppr_options
2988 & ~MSG_EXT_PPR_QAS_REQ;
2989 unsigned int period = tinfo->curr.period;
2990 unsigned long flags;
2991 struct ahc_syncrate *syncrate;
2994 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2996 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2997 starget->channel + 'A', ROLE_INITIATOR);
2998 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2999 ahc_lock(ahc, &flags);
3000 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
3001 ppr_options, AHC_TRANS_GOAL, FALSE);
3002 ahc_unlock(ahc, &flags);
3005 static void ahc_linux_get_iu(struct scsi_target *starget)
3007 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
3008 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
3009 struct ahc_tmode_tstate *tstate;
3010 struct ahc_initiator_tinfo *tinfo
3011 = ahc_fetch_transinfo(ahc,
3012 starget->channel + 'A',
3013 shost->this_id, starget->id, &tstate);
3014 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
3017 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
3019 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
3020 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
3021 struct ahc_tmode_tstate *tstate;
3022 struct ahc_initiator_tinfo *tinfo
3023 = ahc_fetch_transinfo(ahc,
3024 starget->channel + 'A',
3025 shost->this_id, starget->id, &tstate);
3026 struct ahc_devinfo devinfo;
3027 unsigned int ppr_options = tinfo->curr.ppr_options
3028 & ~MSG_EXT_PPR_IU_REQ;
3029 unsigned int period = tinfo->curr.period;
3030 unsigned long flags;
3031 struct ahc_syncrate *syncrate;
3034 ppr_options |= MSG_EXT_PPR_IU_REQ;
3036 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
3037 starget->channel + 'A', ROLE_INITIATOR);
3038 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
3039 ahc_lock(ahc, &flags);
3040 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
3041 ppr_options, AHC_TRANS_GOAL, FALSE);
3042 ahc_unlock(ahc, &flags);
3045 static struct spi_function_template ahc_linux_transport_functions = {
3046 .get_offset = ahc_linux_get_offset,
3047 .set_offset = ahc_linux_set_offset,
3049 .get_period = ahc_linux_get_period,
3050 .set_period = ahc_linux_set_period,
3052 .get_width = ahc_linux_get_width,
3053 .set_width = ahc_linux_set_width,
3055 .get_dt = ahc_linux_get_dt,
3056 .set_dt = ahc_linux_set_dt,
3058 .get_iu = ahc_linux_get_iu,
3059 .set_iu = ahc_linux_set_iu,
3061 .get_qas = ahc_linux_get_qas,
3062 .set_qas = ahc_linux_set_qas,
3069 ahc_linux_init(void)
3071 ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions);
3072 if (!ahc_linux_transport_template)
3074 if (ahc_linux_detect(&aic7xxx_driver_template))
3076 spi_release_transport(ahc_linux_transport_template);
3082 ahc_linux_exit(void)
3084 ahc_linux_pci_exit();
3085 ahc_linux_eisa_exit();
3086 spi_release_transport(ahc_linux_transport_template);
3089 module_init(ahc_linux_init);
3090 module_exit(ahc_linux_exit);