2 * Adaptec AIC79xx device driver for Linux.
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
6 * --------------------------------------------------------------------------
7 * Copyright (c) 1994-2000 Justin T. Gibbs.
8 * Copyright (c) 1997-1999 Doug Ledford
9 * Copyright (c) 2000-2003 Adaptec Inc.
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
45 #include "aic79xx_osm.h"
46 #include "aic79xx_inline.h"
47 #include <scsi/scsicam.h>
49 static struct scsi_transport_template *ahd_linux_transport_template = NULL;
52 * Include aiclib.c as part of our
53 * "module dependencies are hard" work around.
57 #include <linux/init.h> /* __setup */
58 #include <linux/mm.h> /* For fetching system memory size */
59 #include <linux/blkdev.h> /* For block_size() */
60 #include <linux/delay.h> /* For ssleep/msleep */
63 * Lock protecting manipulation of the ahd softc list.
65 spinlock_t ahd_list_spinlock;
68 * Bucket size for counting good commands in between bad ones.
70 #define AHD_LINUX_ERR_THRESH 1000
73 * Set this to the delay in seconds after SCSI bus reset.
74 * Note, we honor this only for the initial bus reset.
75 * The scsi error recovery code performs its own bus settle
76 * delay handling for error recovery actions.
78 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
79 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
81 #define AIC79XX_RESET_DELAY 5000
85 * To change the default number of tagged transactions allowed per-device,
86 * add a line to the lilo.conf file like:
87 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
88 * which will result in the first four devices on the first two
89 * controllers being set to a tagged queue depth of 32.
91 * The tag_commands is an array of 16 to allow for wide and twin adapters.
92 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
96 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
100 * Modify this as you see fit for your system.
102 * 0 tagged queuing disabled
103 * 1 <= n <= 253 n == max tags ever dispatched.
105 * The driver will throttle the number of commands dispatched to a
106 * device if it returns queue full. For devices with a fixed maximum
107 * queue depth, the driver will eventually determine this depth and
108 * lock it in (a console message is printed to indicate that a lock
109 * has occurred). On some devices, queue full is returned for a temporary
110 * resource shortage. These devices will return queue full at varying
111 * depths. The driver will throttle back when the queue fulls occur and
112 * attempt to slowly increase the depth over time as the device recovers
113 * from the resource shortage.
115 * In this example, the first line will disable tagged queueing for all
116 * the devices on the first probed aic79xx adapter.
118 * The second line enables tagged queueing with 4 commands/LUN for IDs
119 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
120 * driver to attempt to use up to 64 tags for ID 1.
122 * The third line is the same as the first line.
124 * The fourth line disables tagged queueing for devices 0 and 3. It
125 * enables tagged queueing for the other IDs, with 16 commands/LUN
126 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
127 * IDs 2, 5-7, and 9-15.
131 * NOTE: The below structure is for reference only, the actual structure
132 * to modify in order to change things is just below this comment block.
133 adapter_tag_info_t aic79xx_tag_info[] =
135 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
136 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
137 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
138 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
142 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
143 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
145 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
148 #define AIC79XX_CONFIGED_TAG_COMMANDS { \
149 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
150 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
151 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
152 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
153 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
154 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
155 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
156 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
160 * By default, use the number of commands specified by
161 * the users kernel configuration.
163 static adapter_tag_info_t aic79xx_tag_info[] =
165 {AIC79XX_CONFIGED_TAG_COMMANDS},
166 {AIC79XX_CONFIGED_TAG_COMMANDS},
167 {AIC79XX_CONFIGED_TAG_COMMANDS},
168 {AIC79XX_CONFIGED_TAG_COMMANDS},
169 {AIC79XX_CONFIGED_TAG_COMMANDS},
170 {AIC79XX_CONFIGED_TAG_COMMANDS},
171 {AIC79XX_CONFIGED_TAG_COMMANDS},
172 {AIC79XX_CONFIGED_TAG_COMMANDS},
173 {AIC79XX_CONFIGED_TAG_COMMANDS},
174 {AIC79XX_CONFIGED_TAG_COMMANDS},
175 {AIC79XX_CONFIGED_TAG_COMMANDS},
176 {AIC79XX_CONFIGED_TAG_COMMANDS},
177 {AIC79XX_CONFIGED_TAG_COMMANDS},
178 {AIC79XX_CONFIGED_TAG_COMMANDS},
179 {AIC79XX_CONFIGED_TAG_COMMANDS},
180 {AIC79XX_CONFIGED_TAG_COMMANDS}
184 * The I/O cell on the chip is very configurable in respect to its analog
185 * characteristics. Set the defaults here; they can be overriden with
186 * the proper insmod parameters.
188 struct ahd_linux_iocell_opts
194 #define AIC79XX_DEFAULT_PRECOMP 0xFF
195 #define AIC79XX_DEFAULT_SLEWRATE 0xFF
196 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF
197 #define AIC79XX_DEFAULT_IOOPTS \
199 AIC79XX_DEFAULT_PRECOMP, \
200 AIC79XX_DEFAULT_SLEWRATE, \
201 AIC79XX_DEFAULT_AMPLITUDE \
203 #define AIC79XX_PRECOMP_INDEX 0
204 #define AIC79XX_SLEWRATE_INDEX 1
205 #define AIC79XX_AMPLITUDE_INDEX 2
206 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS,
214 AIC79XX_DEFAULT_IOOPTS,
215 AIC79XX_DEFAULT_IOOPTS,
216 AIC79XX_DEFAULT_IOOPTS,
217 AIC79XX_DEFAULT_IOOPTS,
218 AIC79XX_DEFAULT_IOOPTS,
219 AIC79XX_DEFAULT_IOOPTS,
220 AIC79XX_DEFAULT_IOOPTS,
221 AIC79XX_DEFAULT_IOOPTS,
222 AIC79XX_DEFAULT_IOOPTS,
223 AIC79XX_DEFAULT_IOOPTS
227 * There should be a specific return value for this in scsi.h, but
228 * it seems that most drivers ignore it.
230 #define DID_UNDERFLOW DID_ERROR
233 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
235 printk("(scsi%d:%c:%d:%d): ",
236 ahd->platform_data->host->host_no,
237 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
238 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
239 scb != NULL ? SCB_GET_LUN(scb) : -1);
243 * XXX - these options apply unilaterally to _all_ adapters
244 * cards in the system. This should be fixed. Exceptions to this
245 * rule are noted in the comments.
249 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
250 * has no effect on any later resets that might occur due to things like
253 static uint32_t aic79xx_no_reset;
256 * Certain PCI motherboards will scan PCI devices from highest to lowest,
257 * others scan from lowest to highest, and they tend to do all kinds of
258 * strange things when they come into contact with PCI bridge chips. The
259 * net result of all this is that the PCI card that is actually used to boot
260 * the machine is very hard to detect. Most motherboards go from lowest
261 * PCI slot number to highest, and the first SCSI controller found is the
262 * one you boot from. The only exceptions to this are when a controller
263 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
264 * from lowest PCI slot number to highest PCI slot number. We also force
265 * all controllers with their BIOS disabled to the end of the list. This
266 * works on *almost* all computers. Where it doesn't work, we have this
267 * option. Setting this option to non-0 will reverse the order of the sort
268 * to highest first, then lowest, but will still leave cards with their BIOS
269 * disabled at the very end. That should fix everyone up unless there are
270 * really strange cirumstances.
272 static uint32_t aic79xx_reverse_scan;
275 * Should we force EXTENDED translation on a controller.
276 * 0 == Use whatever is in the SEEPROM or default to off
277 * 1 == Use whatever is in the SEEPROM or default to on
279 static uint32_t aic79xx_extended;
282 * PCI bus parity checking of the Adaptec controllers. This is somewhat
283 * dubious at best. To my knowledge, this option has never actually
284 * solved a PCI parity problem, but on certain machines with broken PCI
285 * chipset configurations, it can generate tons of false error messages.
286 * It's included in the driver for completeness.
287 * 0 = Shut off PCI parity check
288 * non-0 = Enable PCI parity check
290 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
291 * variable to -1 you would actually want to simply pass the variable
292 * name without a number. That will invert the 0 which will result in
295 static uint32_t aic79xx_pci_parity = ~0;
298 * There are lots of broken chipsets in the world. Some of them will
299 * violate the PCI spec when we issue byte sized memory writes to our
300 * controller. I/O mapped register access, if allowed by the given
301 * platform, will work in almost all cases.
303 uint32_t aic79xx_allow_memio = ~0;
306 * aic79xx_detect() has been run, so register all device arrivals
307 * immediately with the system rather than deferring to the sorted
308 * attachment performed by aic79xx_detect().
310 int aic79xx_detect_complete;
313 * So that we can set how long each device is given as a selection timeout.
314 * The table of values goes like this:
319 * We default to 256ms because some older devices need a longer time
320 * to respond to initial selection.
322 static uint32_t aic79xx_seltime;
325 * Certain devices do not perform any aging on commands. Should the
326 * device be saturated by commands in one portion of the disk, it is
327 * possible for transactions on far away sectors to never be serviced.
328 * To handle these devices, we can periodically send an ordered tag to
329 * force all outstanding transactions to be serviced prior to a new
332 uint32_t aic79xx_periodic_otag;
335 * Module information and settable options.
337 static char *aic79xx = NULL;
339 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
340 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
341 MODULE_LICENSE("Dual BSD/GPL");
342 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
343 module_param(aic79xx, charp, 0444);
344 MODULE_PARM_DESC(aic79xx,
345 "period delimited, options string.\n"
346 " verbose Enable verbose/diagnostic logging\n"
347 " allow_memio Allow device registers to be memory mapped\n"
348 " debug Bitmask of debug values to enable\n"
349 " no_reset Supress initial bus resets\n"
350 " extended Enable extended geometry on all controllers\n"
351 " periodic_otag Send an ordered tagged transaction\n"
352 " periodically to prevent tag starvation.\n"
353 " This may be required by some older disk\n"
354 " or drives/RAID arrays.\n"
355 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
356 " tag_info:<tag_str> Set per-target tag depth\n"
357 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
358 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
359 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
360 " amplitude:<int> Set the signal amplitude (0-7).\n"
361 " seltime:<int> Selection Timeout:\n"
362 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
364 " Sample /etc/modprobe.conf line:\n"
365 " Enable verbose logging\n"
366 " Set tag depth on Controller 2/Target 2 to 10 tags\n"
367 " Shorten the selection timeout to 128ms\n"
369 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
372 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
373 struct scsi_device *,
375 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
376 struct scsi_cmnd *cmd);
377 static void ahd_linux_sem_timeout(u_long arg);
378 static int ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
379 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
380 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
381 struct ahd_devinfo *devinfo);
382 static void ahd_linux_device_queue_depth(struct scsi_device *);
383 static int ahd_linux_run_command(struct ahd_softc*,
384 struct ahd_linux_device *,
386 static void ahd_linux_setup_tag_info_global(char *p);
387 static aic_option_callback_t ahd_linux_setup_tag_info;
388 static aic_option_callback_t ahd_linux_setup_iocell_info;
389 static int aic79xx_setup(char *c);
390 static int ahd_linux_next_unit(void);
392 /****************************** Inlines ***************************************/
393 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
396 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
398 struct scsi_cmnd *cmd;
402 direction = cmd->sc_data_direction;
403 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
404 if (cmd->use_sg != 0) {
405 struct scatterlist *sg;
407 sg = (struct scatterlist *)cmd->request_buffer;
408 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
409 } else if (cmd->request_bufflen != 0) {
410 pci_unmap_single(ahd->dev_softc,
411 scb->platform_data->buf_busaddr,
412 cmd->request_bufflen, direction);
416 /******************************** Macros **************************************/
417 #define BUILD_SCSIID(ahd, cmd) \
418 ((((cmd)->device->id << TID_SHIFT) & TID) | (ahd)->our_id)
421 * Try to detect an Adaptec 79XX controller.
424 ahd_linux_detect(struct scsi_host_template *template)
426 struct ahd_softc *ahd;
431 * If we've been passed any parameters, process them now.
434 aic79xx_setup(aic79xx);
436 template->proc_name = "aic79xx";
439 * Initialize our softc list lock prior to
440 * probing for any adapters.
445 error = ahd_linux_pci_init();
451 * Register with the SCSI layer all
452 * controllers we've found.
455 TAILQ_FOREACH(ahd, &ahd_tailq, links) {
457 if (ahd_linux_register_host(ahd, template) == 0)
460 aic79xx_detect_complete++;
465 * Return a string describing the driver.
468 ahd_linux_info(struct Scsi_Host *host)
470 static char buffer[512];
473 struct ahd_softc *ahd;
476 ahd = *(struct ahd_softc **)host->hostdata;
477 memset(bp, 0, sizeof(buffer));
478 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
479 strcat(bp, AIC79XX_DRIVER_VERSION);
482 strcat(bp, ahd->description);
485 ahd_controller_info(ahd, ahd_info);
486 strcat(bp, ahd_info);
493 * Queue an SCB to the controller.
496 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
498 struct ahd_softc *ahd;
499 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
501 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
504 * Close the race of a command that was in the process of
505 * being queued to us just as our simq was frozen. Let
506 * DV commands through so long as we are only frozen to
509 if (ahd->platform_data->qfrozen != 0) {
510 printf("%s: queue frozen\n", ahd_name(ahd));
512 return SCSI_MLQUEUE_HOST_BUSY;
516 * Save the callback on completion function.
518 cmd->scsi_done = scsi_done;
520 cmd->result = CAM_REQ_INPROG << 16;
522 return ahd_linux_run_command(ahd, dev, cmd);
525 static inline struct scsi_target **
526 ahd_linux_target_in_softc(struct scsi_target *starget)
528 struct ahd_softc *ahd =
529 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
530 unsigned int target_offset;
532 target_offset = starget->id;
533 if (starget->channel != 0)
536 return &ahd->platform_data->starget[target_offset];
540 ahd_linux_target_alloc(struct scsi_target *starget)
542 struct ahd_softc *ahd =
543 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
545 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
546 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
547 struct ahd_devinfo devinfo;
548 struct ahd_initiator_tinfo *tinfo;
549 struct ahd_tmode_tstate *tstate;
550 char channel = starget->channel + 'A';
552 ahd_lock(ahd, &flags);
554 BUG_ON(*ahd_targp != NULL);
556 *ahd_targp = starget;
557 memset(targ, 0, sizeof(*targ));
559 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
560 starget->id, &tstate);
561 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
562 CAM_LUN_WILDCARD, channel,
564 spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
565 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
566 spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
568 spi_max_offset(starget) = MAX_OFFSET_PACED;
569 spi_max_width(starget) = ahd->features & AHD_WIDE;
571 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
572 AHD_TRANS_GOAL, /*paused*/FALSE);
573 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
574 AHD_TRANS_GOAL, /*paused*/FALSE);
575 ahd_unlock(ahd, &flags);
581 ahd_linux_target_destroy(struct scsi_target *starget)
583 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
589 ahd_linux_slave_alloc(struct scsi_device *sdev)
591 struct ahd_softc *ahd =
592 *((struct ahd_softc **)sdev->host->hostdata);
593 struct scsi_target *starget = sdev->sdev_target;
594 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
595 struct ahd_linux_device *dev;
598 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
600 BUG_ON(targ->sdev[sdev->lun] != NULL);
602 dev = scsi_transport_device_data(sdev);
603 memset(dev, 0, sizeof(*dev));
606 * We start out life using untagged
607 * transactions of which we allow one.
612 * Set maxtags to 0. This will be changed if we
613 * later determine that we are dealing with
614 * a tagged queuing capable device.
618 targ->sdev[sdev->lun] = sdev;
624 ahd_linux_slave_configure(struct scsi_device *sdev)
626 struct ahd_softc *ahd;
628 ahd = *((struct ahd_softc **)sdev->host->hostdata);
630 printf("%s: Slave Configure %d\n", ahd_name(ahd), sdev->id);
632 ahd_linux_device_queue_depth(sdev);
634 /* Initial Domain Validation */
635 if (!spi_initial_dv(sdev->sdev_target))
642 ahd_linux_slave_destroy(struct scsi_device *sdev)
644 struct ahd_softc *ahd;
645 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
646 struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
648 ahd = *((struct ahd_softc **)sdev->host->hostdata);
650 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
654 targ->sdev[sdev->lun] = NULL;
658 #if defined(__i386__)
660 * Return the disk geometry for the given SCSI device.
663 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
664 sector_t capacity, int geom[])
672 struct ahd_softc *ahd;
674 ahd = *((struct ahd_softc **)sdev->host->hostdata);
676 bh = scsi_bios_ptable(bdev);
678 ret = scsi_partsize(bh, capacity,
679 &geom[2], &geom[0], &geom[1]);
686 cylinders = aic_sector_div(capacity, heads, sectors);
688 if (aic79xx_extended != 0)
691 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
692 if (extended && cylinders >= 1024) {
695 cylinders = aic_sector_div(capacity, heads, sectors);
705 * Abort the current SCSI command(s).
708 ahd_linux_abort(struct scsi_cmnd *cmd)
712 error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
714 printf("aic79xx_abort returns 0x%x\n", error);
719 * Attempt to send a target reset message to the device that timed out.
722 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
726 error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
728 printf("aic79xx_dev_reset returns 0x%x\n", error);
733 * Reset the SCSI bus.
736 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
738 struct ahd_softc *ahd;
742 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
744 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
745 printf("%s: Bus reset called for cmd %p\n",
749 found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
750 /*initiate reset*/TRUE);
754 printf("%s: SCSI bus reset delivered. "
755 "%d SCBs aborted.\n", ahd_name(ahd), found);
760 struct scsi_host_template aic79xx_driver_template = {
761 .module = THIS_MODULE,
763 .proc_info = ahd_linux_proc_info,
764 .info = ahd_linux_info,
765 .queuecommand = ahd_linux_queue,
766 .eh_abort_handler = ahd_linux_abort,
767 .eh_device_reset_handler = ahd_linux_dev_reset,
768 .eh_bus_reset_handler = ahd_linux_bus_reset,
769 #if defined(__i386__)
770 .bios_param = ahd_linux_biosparam,
772 .can_queue = AHD_MAX_QUEUE,
775 .use_clustering = ENABLE_CLUSTERING,
776 .slave_alloc = ahd_linux_slave_alloc,
777 .slave_configure = ahd_linux_slave_configure,
778 .slave_destroy = ahd_linux_slave_destroy,
779 .target_alloc = ahd_linux_target_alloc,
780 .target_destroy = ahd_linux_target_destroy,
783 /******************************** Bus DMA *************************************/
785 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
786 bus_size_t alignment, bus_size_t boundary,
787 dma_addr_t lowaddr, dma_addr_t highaddr,
788 bus_dma_filter_t *filter, void *filterarg,
789 bus_size_t maxsize, int nsegments,
790 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
794 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
799 * Linux is very simplistic about DMA memory. For now don't
800 * maintain all specification information. Once Linux supplies
801 * better facilities for doing these operations, or the
802 * needs of this particular driver change, we might need to do
805 dmat->alignment = alignment;
806 dmat->boundary = boundary;
807 dmat->maxsize = maxsize;
813 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
815 free(dmat, M_DEVBUF);
819 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
820 int flags, bus_dmamap_t *mapp)
822 *vaddr = pci_alloc_consistent(ahd->dev_softc,
823 dmat->maxsize, mapp);
830 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
831 void* vaddr, bus_dmamap_t map)
833 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
838 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
839 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
840 void *cb_arg, int flags)
843 * Assume for now that this will only be used during
844 * initialization and not for per-transaction buffer mapping.
846 bus_dma_segment_t stack_sg;
848 stack_sg.ds_addr = map;
849 stack_sg.ds_len = dmat->maxsize;
850 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
855 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
860 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
866 /********************* Platform Dependent Functions ***************************/
868 * Compare "left hand" softc with "right hand" softc, returning:
869 * < 0 - lahd has a lower priority than rahd
870 * 0 - Softcs are equal
871 * > 0 - lahd has a higher priority than rahd
874 ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
879 * Under Linux, cards are ordered as follows:
880 * 1) PCI devices that are marked as the boot controller.
881 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
882 * 3) All remaining PCI devices sorted by bus/slot/func.
885 value = (lahd->flags & AHD_BOOT_CHANNEL)
886 - (rahd->flags & AHD_BOOT_CHANNEL);
888 /* Controllers set for boot have a *higher* priority */
892 value = (lahd->flags & AHD_BIOS_ENABLED)
893 - (rahd->flags & AHD_BIOS_ENABLED);
895 /* Controllers with BIOS enabled have a *higher* priority */
898 /* Still equal. Sort by bus/slot/func. */
899 if (aic79xx_reverse_scan != 0)
900 value = ahd_get_pci_bus(lahd->dev_softc)
901 - ahd_get_pci_bus(rahd->dev_softc);
903 value = ahd_get_pci_bus(rahd->dev_softc)
904 - ahd_get_pci_bus(lahd->dev_softc);
907 if (aic79xx_reverse_scan != 0)
908 value = ahd_get_pci_slot(lahd->dev_softc)
909 - ahd_get_pci_slot(rahd->dev_softc);
911 value = ahd_get_pci_slot(rahd->dev_softc)
912 - ahd_get_pci_slot(lahd->dev_softc);
916 value = rahd->channel - lahd->channel;
921 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
925 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
926 uint8_t *iocell_info;
928 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
929 iocell_info[index] = value & 0xFFFF;
931 printf("iocell[%d:%ld] = %d\n", instance, index, value);
936 ahd_linux_setup_tag_info_global(char *p)
940 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
941 printf("Setting Global Tags= %d\n", tags);
943 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
944 for (j = 0; j < AHD_NUM_TARGETS; j++) {
945 aic79xx_tag_info[i].tag_commands[j] = tags;
951 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
954 if ((instance >= 0) && (targ >= 0)
955 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
956 && (targ < AHD_NUM_TARGETS)) {
957 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
959 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
964 * Handle Linux boot parameters. This routine allows for assigning a value
965 * to a parameter with a ':' between the parameter and the value.
966 * ie. aic79xx=stpwlev:1,extended
969 aic79xx_setup(char *s)
979 { "extended", &aic79xx_extended },
980 { "no_reset", &aic79xx_no_reset },
981 { "verbose", &aic79xx_verbose },
982 { "allow_memio", &aic79xx_allow_memio},
984 { "debug", &ahd_debug },
986 { "reverse_scan", &aic79xx_reverse_scan },
987 { "periodic_otag", &aic79xx_periodic_otag },
988 { "pci_parity", &aic79xx_pci_parity },
989 { "seltime", &aic79xx_seltime },
990 { "tag_info", NULL },
991 { "global_tag_depth", NULL},
992 { "slewrate", NULL },
994 { "amplitude", NULL },
997 end = strchr(s, '\0');
1000 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1001 * will never be 0 in this case.
1005 while ((p = strsep(&s, ",.")) != NULL) {
1008 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1010 n = strlen(options[i].name);
1011 if (strncmp(options[i].name, p, n) == 0)
1014 if (i == NUM_ELEMENTS(options))
1017 if (strncmp(p, "global_tag_depth", n) == 0) {
1018 ahd_linux_setup_tag_info_global(p + n);
1019 } else if (strncmp(p, "tag_info", n) == 0) {
1020 s = aic_parse_brace_option("tag_info", p + n, end,
1021 2, ahd_linux_setup_tag_info, 0);
1022 } else if (strncmp(p, "slewrate", n) == 0) {
1023 s = aic_parse_brace_option("slewrate",
1024 p + n, end, 1, ahd_linux_setup_iocell_info,
1025 AIC79XX_SLEWRATE_INDEX);
1026 } else if (strncmp(p, "precomp", n) == 0) {
1027 s = aic_parse_brace_option("precomp",
1028 p + n, end, 1, ahd_linux_setup_iocell_info,
1029 AIC79XX_PRECOMP_INDEX);
1030 } else if (strncmp(p, "amplitude", n) == 0) {
1031 s = aic_parse_brace_option("amplitude",
1032 p + n, end, 1, ahd_linux_setup_iocell_info,
1033 AIC79XX_AMPLITUDE_INDEX);
1034 } else if (p[n] == ':') {
1035 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1036 } else if (!strncmp(p, "verbose", n)) {
1037 *(options[i].flag) = 1;
1039 *(options[i].flag) ^= 0xFFFFFFFF;
1045 __setup("aic79xx=", aic79xx_setup);
1047 uint32_t aic79xx_verbose;
1050 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1053 struct Scsi_Host *host;
1057 template->name = ahd->description;
1058 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1062 *((struct ahd_softc **)host->hostdata) = ahd;
1064 scsi_assign_lock(host, &ahd->platform_data->spin_lock);
1065 ahd->platform_data->host = host;
1066 host->can_queue = AHD_MAX_QUEUE;
1067 host->cmd_per_lun = 2;
1068 host->sg_tablesize = AHD_NSEG;
1069 host->this_id = ahd->our_id;
1070 host->irq = ahd->platform_data->irq;
1071 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1072 host->max_lun = AHD_NUM_LUNS;
1073 host->max_channel = 0;
1074 host->sg_tablesize = AHD_NSEG;
1075 ahd_set_unit(ahd, ahd_linux_next_unit());
1076 sprintf(buf, "scsi%d", host->host_no);
1077 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1078 if (new_name != NULL) {
1079 strcpy(new_name, buf);
1080 ahd_set_name(ahd, new_name);
1082 host->unique_id = ahd->unit;
1083 ahd_linux_initialize_scsi_bus(ahd);
1084 ahd_intr_enable(ahd, TRUE);
1085 ahd_unlock(ahd, &s);
1087 host->transportt = ahd_linux_transport_template;
1089 scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
1090 scsi_scan_host(host);
1095 ahd_linux_get_memsize(void)
1100 return ((uint64_t)si.totalram << PAGE_SHIFT);
1104 * Find the smallest available unit number to use
1105 * for a new device. We don't just use a static
1106 * count to handle the "repeated hot-(un)plug"
1110 ahd_linux_next_unit(void)
1112 struct ahd_softc *ahd;
1117 TAILQ_FOREACH(ahd, &ahd_tailq, links) {
1118 if (ahd->unit == unit) {
1127 * Place the SCSI bus into a known state by either resetting it,
1128 * or forcing transfer negotiations on the next command to any
1132 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1140 if (aic79xx_no_reset != 0)
1141 ahd->flags &= ~AHD_RESET_BUS_A;
1143 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1144 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1146 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1149 * Force negotiation to async for all targets that
1150 * will not see an initial bus reset.
1152 for (; target_id < numtarg; target_id++) {
1153 struct ahd_devinfo devinfo;
1154 struct ahd_initiator_tinfo *tinfo;
1155 struct ahd_tmode_tstate *tstate;
1157 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1158 target_id, &tstate);
1159 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1160 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1161 ahd_update_neg_request(ahd, &devinfo, tstate,
1162 tinfo, AHD_NEG_ALWAYS);
1164 /* Give the bus some time to recover */
1165 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1166 ahd_freeze_simq(ahd);
1167 init_timer(&ahd->platform_data->reset_timer);
1168 ahd->platform_data->reset_timer.data = (u_long)ahd;
1169 ahd->platform_data->reset_timer.expires =
1170 jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
1171 ahd->platform_data->reset_timer.function =
1172 (ahd_linux_callback_t *)ahd_release_simq;
1173 add_timer(&ahd->platform_data->reset_timer);
1178 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1180 ahd->platform_data =
1181 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1182 if (ahd->platform_data == NULL)
1184 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1185 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1187 init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
1188 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1193 ahd_platform_free(struct ahd_softc *ahd)
1195 struct scsi_target *starget;
1198 if (ahd->platform_data != NULL) {
1199 if (ahd->platform_data->host != NULL) {
1200 scsi_remove_host(ahd->platform_data->host);
1201 scsi_host_put(ahd->platform_data->host);
1204 /* destroy all of the device and target objects */
1205 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1206 starget = ahd->platform_data->starget[i];
1207 if (starget != NULL) {
1208 for (j = 0; j < AHD_NUM_LUNS; j++) {
1209 struct ahd_linux_target *targ =
1210 scsi_transport_target_data(starget);
1211 if (targ->sdev[j] == NULL)
1213 targ->sdev[j] = NULL;
1215 ahd->platform_data->starget[i] = NULL;
1219 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1220 free_irq(ahd->platform_data->irq, ahd);
1221 if (ahd->tags[0] == BUS_SPACE_PIO
1222 && ahd->bshs[0].ioport != 0)
1223 release_region(ahd->bshs[0].ioport, 256);
1224 if (ahd->tags[1] == BUS_SPACE_PIO
1225 && ahd->bshs[1].ioport != 0)
1226 release_region(ahd->bshs[1].ioport, 256);
1227 if (ahd->tags[0] == BUS_SPACE_MEMIO
1228 && ahd->bshs[0].maddr != NULL) {
1229 iounmap(ahd->bshs[0].maddr);
1230 release_mem_region(ahd->platform_data->mem_busaddr,
1233 free(ahd->platform_data, M_DEVBUF);
1238 ahd_platform_init(struct ahd_softc *ahd)
1241 * Lookup and commit any modified IO Cell options.
1243 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1244 struct ahd_linux_iocell_opts *iocell_opts;
1246 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1247 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1248 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1249 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1250 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1251 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1252 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1258 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1260 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1261 SCB_GET_CHANNEL(ahd, scb),
1262 SCB_GET_LUN(scb), SCB_LIST_NULL,
1263 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1267 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1270 struct scsi_target *starget;
1271 struct ahd_linux_target *targ;
1272 struct ahd_linux_device *dev;
1273 struct scsi_device *sdev;
1277 starget = ahd->platform_data->starget[devinfo->target];
1278 targ = scsi_transport_target_data(starget);
1279 BUG_ON(targ == NULL);
1280 sdev = targ->sdev[devinfo->lun];
1284 dev = scsi_transport_device_data(sdev);
1288 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1291 case AHD_QUEUE_NONE:
1294 case AHD_QUEUE_BASIC:
1295 now_queuing = AHD_DEV_Q_BASIC;
1297 case AHD_QUEUE_TAGGED:
1298 now_queuing = AHD_DEV_Q_TAGGED;
1301 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1302 && (was_queuing != now_queuing)
1303 && (dev->active != 0)) {
1304 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1308 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1312 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1315 * Start out agressively and allow our
1316 * dynamic queue depth algorithm to take
1319 dev->maxtags = usertags;
1320 dev->openings = dev->maxtags - dev->active;
1322 if (dev->maxtags == 0) {
1324 * Queueing is disabled by the user.
1327 } else if (alg == AHD_QUEUE_TAGGED) {
1328 dev->flags |= AHD_DEV_Q_TAGGED;
1329 if (aic79xx_periodic_otag != 0)
1330 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1332 dev->flags |= AHD_DEV_Q_BASIC;
1334 /* We can only have one opening. */
1336 dev->openings = 1 - dev->active;
1339 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1340 case AHD_DEV_Q_BASIC:
1341 scsi_adjust_queue_depth(sdev,
1343 dev->openings + dev->active);
1345 case AHD_DEV_Q_TAGGED:
1346 scsi_adjust_queue_depth(sdev,
1348 dev->openings + dev->active);
1352 * We allow the OS to queue 2 untagged transactions to
1353 * us at any time even though we can only execute them
1354 * serially on the controller/device. This should
1355 * remove some latency.
1357 scsi_adjust_queue_depth(sdev,
1365 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1366 int lun, u_int tag, role_t role, uint32_t status)
1372 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1374 static int warned_user;
1378 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1379 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
1381 if (warned_user == 0) {
1383 "aic79xx: WARNING: Insufficient tag_info instances\n"
1384 "aic79xx: for installed controllers. Using defaults\n"
1385 "aic79xx: Please update the aic79xx_tag_info array in\n"
1386 "aic79xx: the aic79xx_osm.c source file.\n");
1389 tags = AHD_MAX_QUEUE;
1391 adapter_tag_info_t *tag_info;
1393 tag_info = &aic79xx_tag_info[ahd->unit];
1394 tags = tag_info->tag_commands[devinfo->target_offset];
1395 if (tags > AHD_MAX_QUEUE)
1396 tags = AHD_MAX_QUEUE;
1403 * Determines the queue depth for a given device.
1406 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1408 struct ahd_devinfo devinfo;
1410 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1412 ahd_compile_devinfo(&devinfo,
1414 sdev->sdev_target->id, sdev->lun,
1415 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1417 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1418 if (tags != 0 && sdev->tagged_supported != 0) {
1420 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
1421 ahd_print_devinfo(ahd, &devinfo);
1422 printf("Tagged Queuing enabled. Depth %d\n", tags);
1424 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
1429 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1430 struct scsi_cmnd *cmd)
1433 struct hardware_scb *hscb;
1434 struct ahd_initiator_tinfo *tinfo;
1435 struct ahd_tmode_tstate *tstate;
1440 * Get an scb to use.
1442 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1443 cmd->device->id, &tstate);
1444 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1445 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1446 col_idx = AHD_NEVER_COL_IDX;
1448 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1451 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1452 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1453 return SCSI_MLQUEUE_HOST_BUSY;
1457 scb->platform_data->dev = dev;
1459 cmd->host_scribble = (char *)scb;
1462 * Fill out basics of the HSCB.
1465 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1466 hscb->lun = cmd->device->lun;
1467 scb->hscb->task_management = 0;
1468 mask = SCB_GET_TARGET_MASK(ahd, scb);
1470 if ((ahd->user_discenable & mask) != 0)
1471 hscb->control |= DISCENB;
1473 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1474 scb->flags |= SCB_PACKETIZED;
1476 if ((tstate->auto_negotiate & mask) != 0) {
1477 scb->flags |= SCB_AUTO_NEGOTIATE;
1478 scb->hscb->control |= MK_MESSAGE;
1481 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1483 uint8_t tag_msgs[2];
1485 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1486 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1487 hscb->control |= tag_msgs[0];
1488 if (tag_msgs[0] == MSG_ORDERED_TASK)
1489 dev->commands_since_idle_or_otag = 0;
1491 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1492 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1493 hscb->control |= MSG_ORDERED_TASK;
1494 dev->commands_since_idle_or_otag = 0;
1496 hscb->control |= MSG_SIMPLE_TASK;
1500 hscb->cdb_len = cmd->cmd_len;
1501 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1503 scb->platform_data->xfer_len = 0;
1504 ahd_set_residual(scb, 0);
1505 ahd_set_sense_residual(scb, 0);
1507 if (cmd->use_sg != 0) {
1509 struct scatterlist *cur_seg;
1513 cur_seg = (struct scatterlist *)cmd->request_buffer;
1514 dir = cmd->sc_data_direction;
1515 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1517 scb->platform_data->xfer_len = 0;
1518 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1522 addr = sg_dma_address(cur_seg);
1523 len = sg_dma_len(cur_seg);
1524 scb->platform_data->xfer_len += len;
1525 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1528 } else if (cmd->request_bufflen != 0) {
1534 dir = cmd->sc_data_direction;
1535 addr = pci_map_single(ahd->dev_softc,
1536 cmd->request_buffer,
1537 cmd->request_bufflen, dir);
1538 scb->platform_data->xfer_len = cmd->request_bufflen;
1539 scb->platform_data->buf_busaddr = addr;
1540 sg = ahd_sg_setup(ahd, scb, sg, addr,
1541 cmd->request_bufflen, /*last*/TRUE);
1544 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1547 dev->commands_issued++;
1549 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1550 dev->commands_since_idle_or_otag++;
1551 scb->flags |= SCB_ACTIVE;
1552 ahd_queue_scb(ahd, scb);
1558 * SCSI controller interrupt handler.
1561 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1563 struct ahd_softc *ahd;
1567 ahd = (struct ahd_softc *) dev_id;
1568 ahd_lock(ahd, &flags);
1569 ours = ahd_intr(ahd);
1570 ahd_unlock(ahd, &flags);
1571 return IRQ_RETVAL(ours);
1575 ahd_platform_flushwork(struct ahd_softc *ahd)
1581 ahd_send_async(struct ahd_softc *ahd, char channel,
1582 u_int target, u_int lun, ac_code code, void *arg)
1585 case AC_TRANSFER_NEG:
1588 struct scsi_target *starget;
1589 struct ahd_linux_target *targ;
1590 struct info_str info;
1591 struct ahd_initiator_tinfo *tinfo;
1592 struct ahd_tmode_tstate *tstate;
1593 unsigned int target_ppr_options;
1595 BUG_ON(target == CAM_TARGET_WILDCARD);
1598 info.length = sizeof(buf);
1601 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1605 * Don't bother reporting results while
1606 * negotiations are still pending.
1608 if (tinfo->curr.period != tinfo->goal.period
1609 || tinfo->curr.width != tinfo->goal.width
1610 || tinfo->curr.offset != tinfo->goal.offset
1611 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1612 if (bootverbose == 0)
1616 * Don't bother reporting results that
1617 * are identical to those last reported.
1619 starget = ahd->platform_data->starget[target];
1620 targ = scsi_transport_target_data(starget);
1624 target_ppr_options =
1625 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1626 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1627 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1629 if (tinfo->curr.period == spi_period(starget)
1630 && tinfo->curr.width == spi_width(starget)
1631 && tinfo->curr.offset == spi_offset(starget)
1632 && tinfo->curr.ppr_options == target_ppr_options)
1633 if (bootverbose == 0)
1636 spi_period(starget) = tinfo->curr.period;
1637 spi_width(starget) = tinfo->curr.width;
1638 spi_offset(starget) = tinfo->curr.offset;
1639 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
1640 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
1641 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
1642 spi_display_xfer_agreement(starget);
1647 WARN_ON(lun != CAM_LUN_WILDCARD);
1648 scsi_report_device_reset(ahd->platform_data->host,
1649 channel - 'A', target);
1653 if (ahd->platform_data->host != NULL) {
1654 scsi_report_bus_reset(ahd->platform_data->host,
1659 panic("ahd_send_async: Unexpected async event");
1664 * Calls the higher level scsi done function and frees the scb.
1667 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1669 struct scsi_cmnd *cmd;
1670 struct ahd_linux_device *dev;
1672 if ((scb->flags & SCB_ACTIVE) == 0) {
1673 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1674 ahd_dump_card_state(ahd);
1675 panic("Stopping for safety");
1677 LIST_REMOVE(scb, pending_links);
1679 dev = scb->platform_data->dev;
1682 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1683 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1686 ahd_linux_unmap_scb(ahd, scb);
1689 * Guard against stale sense data.
1690 * The Linux mid-layer assumes that sense
1691 * was retrieved anytime the first byte of
1692 * the sense buffer looks "sane".
1694 cmd->sense_buffer[0] = 0;
1695 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1696 uint32_t amount_xferred;
1699 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1700 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1702 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1703 ahd_print_path(ahd, scb);
1704 printf("Set CAM_UNCOR_PARITY\n");
1707 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1708 #ifdef AHD_REPORT_UNDERFLOWS
1710 * This code is disabled by default as some
1711 * clients of the SCSI system do not properly
1712 * initialize the underflow parameter. This
1713 * results in spurious termination of commands
1714 * that complete as expected (e.g. underflow is
1715 * allowed as command can return variable amounts
1718 } else if (amount_xferred < scb->io_ctx->underflow) {
1721 ahd_print_path(ahd, scb);
1723 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1724 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1726 ahd_print_path(ahd, scb);
1727 printf("Saw underflow (%ld of %ld bytes). "
1728 "Treated as error\n",
1729 ahd_get_residual(scb),
1730 ahd_get_transfer_length(scb));
1731 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1734 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1736 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1737 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1740 if (dev->openings == 1
1741 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1742 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1743 dev->tag_success_count++;
1745 * Some devices deal with temporary internal resource
1746 * shortages by returning queue full. When the queue
1747 * full occurrs, we throttle back. Slowly try to get
1748 * back to our previous queue depth.
1750 if ((dev->openings + dev->active) < dev->maxtags
1751 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1752 dev->tag_success_count = 0;
1756 if (dev->active == 0)
1757 dev->commands_since_idle_or_otag = 0;
1759 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1760 printf("Recovery SCB completes\n");
1761 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1762 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1763 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1764 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
1765 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
1766 up(&ahd->platform_data->eh_sem);
1770 ahd_free_scb(ahd, scb);
1771 ahd_linux_queue_cmd_complete(ahd, cmd);
1775 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1776 struct scsi_device *sdev, struct scb *scb)
1778 struct ahd_devinfo devinfo;
1779 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1781 ahd_compile_devinfo(&devinfo,
1783 sdev->sdev_target->id, sdev->lun,
1784 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1788 * We don't currently trust the mid-layer to
1789 * properly deal with queue full or busy. So,
1790 * when one occurs, we tell the mid-layer to
1791 * unconditionally requeue the command to us
1792 * so that we can retry it ourselves. We also
1793 * implement our own throttling mechanism so
1794 * we don't clobber the device with too many
1797 switch (ahd_get_scsi_status(scb)) {
1800 case SCSI_STATUS_CHECK_COND:
1801 case SCSI_STATUS_CMD_TERMINATED:
1803 struct scsi_cmnd *cmd;
1806 * Copy sense information to the OS's cmd
1807 * structure if it is available.
1810 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1811 struct scsi_status_iu_header *siu;
1815 if (scb->flags & SCB_SENSE) {
1816 sense_size = MIN(sizeof(struct scsi_sense_data)
1817 - ahd_get_sense_residual(scb),
1818 sizeof(cmd->sense_buffer));
1822 * Copy only the sense data into the provided
1825 siu = (struct scsi_status_iu_header *)
1827 sense_size = MIN(scsi_4btoul(siu->sense_length),
1828 sizeof(cmd->sense_buffer));
1829 sense_offset = SIU_SENSE_OFFSET(siu);
1832 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1833 memcpy(cmd->sense_buffer,
1834 ahd_get_sense_buf(ahd, scb)
1835 + sense_offset, sense_size);
1836 cmd->result |= (DRIVER_SENSE << 24);
1839 if (ahd_debug & AHD_SHOW_SENSE) {
1842 printf("Copied %d bytes of sense data at %d:",
1843 sense_size, sense_offset);
1844 for (i = 0; i < sense_size; i++) {
1847 printf("0x%x ", cmd->sense_buffer[i]);
1855 case SCSI_STATUS_QUEUE_FULL:
1857 * By the time the core driver has returned this
1858 * command, all other commands that were queued
1859 * to us but not the device have been returned.
1860 * This ensures that dev->active is equal to
1861 * the number of commands actually queued to
1864 dev->tag_success_count = 0;
1865 if (dev->active != 0) {
1867 * Drop our opening count to the number
1868 * of commands currently outstanding.
1872 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1873 ahd_print_path(ahd, scb);
1874 printf("Dropping tag count to %d\n",
1878 if (dev->active == dev->tags_on_last_queuefull) {
1880 dev->last_queuefull_same_count++;
1882 * If we repeatedly see a queue full
1883 * at the same queue depth, this
1884 * device has a fixed number of tag
1885 * slots. Lock in this tag depth
1886 * so we stop seeing queue fulls from
1889 if (dev->last_queuefull_same_count
1890 == AHD_LOCK_TAGS_COUNT) {
1891 dev->maxtags = dev->active;
1892 ahd_print_path(ahd, scb);
1893 printf("Locking max tag count at %d\n",
1897 dev->tags_on_last_queuefull = dev->active;
1898 dev->last_queuefull_same_count = 0;
1900 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1901 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1902 ahd_platform_set_tags(ahd, &devinfo,
1903 (dev->flags & AHD_DEV_Q_BASIC)
1904 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1908 * Drop down to a single opening, and treat this
1909 * as if the target returned BUSY SCSI status.
1912 ahd_platform_set_tags(ahd, &devinfo,
1913 (dev->flags & AHD_DEV_Q_BASIC)
1914 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1915 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1920 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1923 * Map CAM error codes into Linux Error codes. We
1924 * avoid the conversion so that the DV code has the
1925 * full error information available when making
1926 * state change decisions.
1932 status = ahd_cmd_get_transaction_status(cmd);
1934 case CAM_REQ_INPROG:
1936 case CAM_SCSI_STATUS_ERROR:
1937 new_status = DID_OK;
1939 case CAM_REQ_ABORTED:
1940 new_status = DID_ABORT;
1943 new_status = DID_BUS_BUSY;
1945 case CAM_REQ_INVALID:
1946 case CAM_PATH_INVALID:
1947 new_status = DID_BAD_TARGET;
1949 case CAM_SEL_TIMEOUT:
1950 new_status = DID_NO_CONNECT;
1952 case CAM_SCSI_BUS_RESET:
1954 new_status = DID_RESET;
1956 case CAM_UNCOR_PARITY:
1957 new_status = DID_PARITY;
1959 case CAM_CMD_TIMEOUT:
1960 new_status = DID_TIME_OUT;
1963 case CAM_REQ_CMP_ERR:
1964 case CAM_AUTOSENSE_FAIL:
1966 case CAM_DATA_RUN_ERR:
1967 case CAM_UNEXP_BUSFREE:
1968 case CAM_SEQUENCE_FAIL:
1969 case CAM_CCB_LEN_ERR:
1970 case CAM_PROVIDE_FAIL:
1971 case CAM_REQ_TERMIO:
1972 case CAM_UNREC_HBA_ERROR:
1973 case CAM_REQ_TOO_BIG:
1974 new_status = DID_ERROR;
1976 case CAM_REQUEUE_REQ:
1977 new_status = DID_REQUEUE;
1980 /* We should never get here */
1981 new_status = DID_ERROR;
1985 ahd_cmd_set_transaction_status(cmd, new_status);
1988 cmd->scsi_done(cmd);
1992 ahd_linux_sem_timeout(u_long arg)
1994 struct ahd_softc *ahd;
1997 ahd = (struct ahd_softc *)arg;
2000 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
2001 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
2002 up(&ahd->platform_data->eh_sem);
2004 ahd_unlock(ahd, &s);
2008 ahd_freeze_simq(struct ahd_softc *ahd)
2010 ahd->platform_data->qfrozen++;
2011 if (ahd->platform_data->qfrozen == 1) {
2012 scsi_block_requests(ahd->platform_data->host);
2013 ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2014 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2015 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2020 ahd_release_simq(struct ahd_softc *ahd)
2027 if (ahd->platform_data->qfrozen > 0)
2028 ahd->platform_data->qfrozen--;
2029 if (ahd->platform_data->qfrozen == 0) {
2032 ahd_unlock(ahd, &s);
2034 * There is still a race here. The mid-layer
2035 * should keep its own freeze count and use
2036 * a bottom half handler to run the queues
2037 * so we can unblock with our own lock held.
2040 scsi_unblock_requests(ahd->platform_data->host);
2044 ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2046 struct ahd_softc *ahd;
2047 struct ahd_linux_device *dev;
2048 struct scb *pending_scb;
2050 u_int active_scbptr;
2059 ahd_mode_state saved_modes;
2064 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2066 printf("%s:%d:%d:%d: Attempting to queue a%s message:",
2067 ahd_name(ahd), cmd->device->channel,
2068 cmd->device->id, cmd->device->lun,
2069 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2072 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2073 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2076 spin_lock_irq(&ahd->platform_data->spin_lock);
2079 * First determine if we currently own this command.
2080 * Start by searching the device queue. If not found
2081 * there, check the pending_scb list. If not found
2082 * at all, and the system wanted us to just abort the
2083 * command, return success.
2085 dev = scsi_transport_device_data(cmd->device);
2089 * No target device for this command exists,
2090 * so we must not still own the command.
2092 printf("%s:%d:%d:%d: Is not an active device\n",
2093 ahd_name(ahd), cmd->device->channel, cmd->device->id,
2100 * See if we can find a matching cmd in the pending list.
2102 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2103 if (pending_scb->io_ctx == cmd)
2107 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2109 /* Any SCB for this device will do for a target reset */
2110 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2111 if (ahd_match_scb(ahd, pending_scb, cmd->device->id,
2112 cmd->device->channel + 'A',
2114 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2119 if (pending_scb == NULL) {
2120 printf("%s:%d:%d:%d: Command not found\n",
2121 ahd_name(ahd), cmd->device->channel, cmd->device->id,
2126 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2128 * We can't queue two recovery actions using the same SCB
2135 * Ensure that the card doesn't do anything
2136 * behind our back. Also make sure that we
2137 * didn't "just" miss an interrupt that would
2140 was_paused = ahd_is_paused(ahd);
2141 ahd_pause_and_flushwork(ahd);
2144 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2145 printf("%s:%d:%d:%d: Command already completed\n",
2146 ahd_name(ahd), cmd->device->channel, cmd->device->id,
2151 printf("%s: At time of recovery, card was %spaused\n",
2152 ahd_name(ahd), was_paused ? "" : "not ");
2153 ahd_dump_card_state(ahd);
2155 disconnected = TRUE;
2156 if (flag == SCB_ABORT) {
2157 if (ahd_search_qinfifo(ahd, cmd->device->id,
2158 cmd->device->channel + 'A',
2160 pending_scb->hscb->tag,
2161 ROLE_INITIATOR, CAM_REQ_ABORTED,
2162 SEARCH_COMPLETE) > 0) {
2163 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2164 ahd_name(ahd), cmd->device->channel,
2165 cmd->device->id, cmd->device->lun);
2169 } else if (ahd_search_qinfifo(ahd, cmd->device->id,
2170 cmd->device->channel + 'A',
2171 cmd->device->lun, pending_scb->hscb->tag,
2172 ROLE_INITIATOR, /*status*/0,
2173 SEARCH_COUNT) > 0) {
2174 disconnected = FALSE;
2177 saved_modes = ahd_save_modes(ahd);
2178 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2179 last_phase = ahd_inb(ahd, LASTPHASE);
2180 saved_scbptr = ahd_get_scbptr(ahd);
2181 active_scbptr = saved_scbptr;
2182 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2183 struct scb *bus_scb;
2185 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2186 if (bus_scb == pending_scb)
2187 disconnected = FALSE;
2188 else if (flag != SCB_ABORT
2189 && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
2190 && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2191 disconnected = FALSE;
2195 * At this point, pending_scb is the scb associated with the
2196 * passed in command. That command is currently active on the
2197 * bus or is in the disconnected state.
2199 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2200 if (last_phase != P_BUSFREE
2201 && (SCB_GET_TAG(pending_scb) == active_scbptr
2202 || (flag == SCB_DEVICE_RESET
2203 && SCSIID_TARGET(ahd, saved_scsiid) == cmd->device->id))) {
2206 * We're active on the bus, so assert ATN
2207 * and hope that the target responds.
2209 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2210 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2211 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2212 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2213 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2214 ahd_name(ahd), cmd->device->channel,
2215 cmd->device->id, cmd->device->lun);
2217 } else if (disconnected) {
2220 * Actually re-queue this SCB in an attempt
2221 * to select the device before it reconnects.
2223 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2224 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2225 pending_scb->hscb->cdb_len = 0;
2226 pending_scb->hscb->task_attribute = 0;
2227 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2229 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2231 * Mark the SCB has having an outstanding
2232 * task management function. Should the command
2233 * complete normally before the task management
2234 * function can be sent, the host will be notified
2235 * to abort our requeued SCB.
2237 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2238 pending_scb->hscb->task_management);
2241 * If non-packetized, set the MK_MESSAGE control
2242 * bit indicating that we desire to send a message.
2243 * We also set the disconnected flag since there is
2244 * no guarantee that our SCB control byte matches
2245 * the version on the card. We don't want the
2246 * sequencer to abort the command thinking an
2247 * unsolicited reselection occurred.
2249 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2252 * The sequencer will never re-reference the
2253 * in-core SCB. To make sure we are notified
2254 * during reslection, set the MK_MESSAGE flag in
2255 * the card's copy of the SCB.
2257 ahd_outb(ahd, SCB_CONTROL,
2258 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2262 * Clear out any entries in the QINFIFO first
2263 * so we are the next SCB for this target
2266 ahd_search_qinfifo(ahd, cmd->device->id,
2267 cmd->device->channel + 'A', cmd->device->lun,
2268 SCB_LIST_NULL, ROLE_INITIATOR,
2269 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2270 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2271 ahd_set_scbptr(ahd, saved_scbptr);
2272 ahd_print_path(ahd, pending_scb);
2273 printf("Device is disconnected, re-queuing SCB\n");
2276 printf("%s:%d:%d:%d: Unable to deliver message\n",
2277 ahd_name(ahd), cmd->device->channel,
2278 cmd->device->id, cmd->device->lun);
2285 * Our assumption is that if we don't have the command, no
2286 * recovery action was required, so we return success. Again,
2287 * the semantics of the mid-layer recovery engine are not
2288 * well defined, so this may change in time.
2295 struct timer_list timer;
2298 ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM;
2299 spin_unlock_irq(&ahd->platform_data->spin_lock);
2301 timer.data = (u_long)ahd;
2302 timer.expires = jiffies + (5 * HZ);
2303 timer.function = ahd_linux_sem_timeout;
2305 printf("Recovery code sleeping\n");
2306 down(&ahd->platform_data->eh_sem);
2307 printf("Recovery code awake\n");
2308 ret = del_timer_sync(&timer);
2310 printf("Timer Expired\n");
2313 spin_lock_irq(&ahd->platform_data->spin_lock);
2315 spin_unlock_irq(&ahd->platform_data->spin_lock);
2319 static void ahd_linux_exit(void);
2321 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2323 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2324 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2325 struct ahd_devinfo devinfo;
2326 unsigned long flags;
2328 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2329 starget->channel + 'A', ROLE_INITIATOR);
2330 ahd_lock(ahd, &flags);
2331 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2332 ahd_unlock(ahd, &flags);
2335 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2337 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2338 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2339 struct ahd_tmode_tstate *tstate;
2340 struct ahd_initiator_tinfo *tinfo
2341 = ahd_fetch_transinfo(ahd,
2342 starget->channel + 'A',
2343 shost->this_id, starget->id, &tstate);
2344 struct ahd_devinfo devinfo;
2345 unsigned int ppr_options = tinfo->goal.ppr_options;
2346 unsigned long flags;
2347 unsigned long offset = tinfo->goal.offset;
2350 offset = MAX_OFFSET;
2355 ppr_options |= MSG_EXT_PPR_DT_REQ;
2357 ppr_options |= MSG_EXT_PPR_IU_REQ;
2360 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2361 starget->channel + 'A', ROLE_INITIATOR);
2363 /* all PPR requests apart from QAS require wide transfers */
2364 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2365 if (spi_width(starget) == 0)
2366 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2369 ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX);
2370 ahd_lock(ahd, &flags);
2371 ahd_set_syncrate(ahd, &devinfo, period, offset,
2372 ppr_options, AHD_TRANS_GOAL, FALSE);
2373 ahd_unlock(ahd, &flags);
2376 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2378 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2379 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2380 struct ahd_tmode_tstate *tstate;
2381 struct ahd_initiator_tinfo *tinfo
2382 = ahd_fetch_transinfo(ahd,
2383 starget->channel + 'A',
2384 shost->this_id, starget->id, &tstate);
2385 struct ahd_devinfo devinfo;
2386 unsigned int ppr_options = 0;
2387 unsigned int period = 0;
2388 unsigned long flags;
2390 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2391 starget->channel + 'A', ROLE_INITIATOR);
2393 period = tinfo->goal.period;
2394 ppr_options = tinfo->goal.ppr_options;
2395 ahd_find_syncrate(ahd, &period, &ppr_options, AHD_SYNCRATE_MAX);
2397 ahd_lock(ahd, &flags);
2398 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2399 AHD_TRANS_GOAL, FALSE);
2400 ahd_unlock(ahd, &flags);
2403 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2405 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2406 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2407 struct ahd_tmode_tstate *tstate;
2408 struct ahd_initiator_tinfo *tinfo
2409 = ahd_fetch_transinfo(ahd,
2410 starget->channel + 'A',
2411 shost->this_id, starget->id, &tstate);
2412 struct ahd_devinfo devinfo;
2413 unsigned int ppr_options = tinfo->goal.ppr_options
2414 & ~MSG_EXT_PPR_DT_REQ;
2415 unsigned int period = tinfo->goal.period;
2416 unsigned long flags;
2419 ppr_options |= MSG_EXT_PPR_DT_REQ;
2421 period = 9; /* at least 12.5ns for DT */
2422 } else if (period <= 9)
2423 period = 10; /* If resetting DT, period must be >= 25ns */
2425 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2426 starget->channel + 'A', ROLE_INITIATOR);
2427 ahd_find_syncrate(ahd, &period, &ppr_options,
2428 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2429 ahd_lock(ahd, &flags);
2430 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2431 ppr_options, AHD_TRANS_GOAL, FALSE);
2432 ahd_unlock(ahd, &flags);
2435 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2437 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2438 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2439 struct ahd_tmode_tstate *tstate;
2440 struct ahd_initiator_tinfo *tinfo
2441 = ahd_fetch_transinfo(ahd,
2442 starget->channel + 'A',
2443 shost->this_id, starget->id, &tstate);
2444 struct ahd_devinfo devinfo;
2445 unsigned int ppr_options = tinfo->goal.ppr_options
2446 & ~MSG_EXT_PPR_QAS_REQ;
2447 unsigned int period = tinfo->goal.period;
2448 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2449 unsigned long flags;
2452 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2454 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2455 starget->channel + 'A', ROLE_INITIATOR);
2456 ahd_find_syncrate(ahd, &period, &ppr_options,
2457 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2458 ahd_lock(ahd, &flags);
2459 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2460 ppr_options, AHD_TRANS_GOAL, FALSE);
2461 ahd_unlock(ahd, &flags);
2464 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2466 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2467 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2468 struct ahd_tmode_tstate *tstate;
2469 struct ahd_initiator_tinfo *tinfo
2470 = ahd_fetch_transinfo(ahd,
2471 starget->channel + 'A',
2472 shost->this_id, starget->id, &tstate);
2473 struct ahd_devinfo devinfo;
2474 unsigned int ppr_options = tinfo->goal.ppr_options
2475 & ~MSG_EXT_PPR_IU_REQ;
2476 unsigned int period = tinfo->goal.period;
2477 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2478 unsigned long flags;
2481 ppr_options |= MSG_EXT_PPR_IU_REQ;
2483 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2484 starget->channel + 'A', ROLE_INITIATOR);
2485 ahd_find_syncrate(ahd, &period, &ppr_options,
2486 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2487 ahd_lock(ahd, &flags);
2488 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2489 ppr_options, AHD_TRANS_GOAL, FALSE);
2490 ahd_unlock(ahd, &flags);
2493 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2495 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2496 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2497 struct ahd_tmode_tstate *tstate;
2498 struct ahd_initiator_tinfo *tinfo
2499 = ahd_fetch_transinfo(ahd,
2500 starget->channel + 'A',
2501 shost->this_id, starget->id, &tstate);
2502 struct ahd_devinfo devinfo;
2503 unsigned int ppr_options = tinfo->goal.ppr_options
2504 & ~MSG_EXT_PPR_RD_STRM;
2505 unsigned int period = tinfo->goal.period;
2506 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2507 unsigned long flags;
2510 ppr_options |= MSG_EXT_PPR_RD_STRM;
2512 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2513 starget->channel + 'A', ROLE_INITIATOR);
2514 ahd_find_syncrate(ahd, &period, &ppr_options,
2515 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2516 ahd_lock(ahd, &flags);
2517 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2518 ppr_options, AHD_TRANS_GOAL, FALSE);
2519 ahd_unlock(ahd, &flags);
2522 static struct spi_function_template ahd_linux_transport_functions = {
2523 .set_offset = ahd_linux_set_offset,
2525 .set_period = ahd_linux_set_period,
2527 .set_width = ahd_linux_set_width,
2529 .set_dt = ahd_linux_set_dt,
2531 .set_iu = ahd_linux_set_iu,
2533 .set_qas = ahd_linux_set_qas,
2535 .set_rd_strm = ahd_linux_set_rd_strm,
2542 ahd_linux_init(void)
2544 ahd_linux_transport_template = spi_attach_transport(&ahd_linux_transport_functions);
2545 if (!ahd_linux_transport_template)
2547 scsi_transport_reserve_target(ahd_linux_transport_template,
2548 sizeof(struct ahd_linux_target));
2549 scsi_transport_reserve_device(ahd_linux_transport_template,
2550 sizeof(struct ahd_linux_device));
2551 if (ahd_linux_detect(&aic79xx_driver_template) > 0)
2553 spi_release_transport(ahd_linux_transport_template);
2559 ahd_linux_exit(void)
2561 ahd_linux_pci_exit();
2562 spi_release_transport(ahd_linux_transport_template);
2565 module_init(ahd_linux_init);
2566 module_exit(ahd_linux_exit);