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
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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;
51 #include <linux/init.h> /* __setup */
52 #include <linux/mm.h> /* For fetching system memory size */
53 #include <linux/blkdev.h> /* For block_size() */
54 #include <linux/delay.h> /* For ssleep/msleep */
55 #include <linux/device.h>
58 * Bucket size for counting good commands in between bad ones.
60 #define AHD_LINUX_ERR_THRESH 1000
63 * Set this to the delay in seconds after SCSI bus reset.
64 * Note, we honor this only for the initial bus reset.
65 * The scsi error recovery code performs its own bus settle
66 * delay handling for error recovery actions.
68 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
69 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
71 #define AIC79XX_RESET_DELAY 5000
75 * To change the default number of tagged transactions allowed per-device,
76 * add a line to the lilo.conf file like:
77 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
78 * which will result in the first four devices on the first two
79 * controllers being set to a tagged queue depth of 32.
81 * The tag_commands is an array of 16 to allow for wide and twin adapters.
82 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
86 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
90 * Modify this as you see fit for your system.
92 * 0 tagged queuing disabled
93 * 1 <= n <= 253 n == max tags ever dispatched.
95 * The driver will throttle the number of commands dispatched to a
96 * device if it returns queue full. For devices with a fixed maximum
97 * queue depth, the driver will eventually determine this depth and
98 * lock it in (a console message is printed to indicate that a lock
99 * has occurred). On some devices, queue full is returned for a temporary
100 * resource shortage. These devices will return queue full at varying
101 * depths. The driver will throttle back when the queue fulls occur and
102 * attempt to slowly increase the depth over time as the device recovers
103 * from the resource shortage.
105 * In this example, the first line will disable tagged queueing for all
106 * the devices on the first probed aic79xx adapter.
108 * The second line enables tagged queueing with 4 commands/LUN for IDs
109 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
110 * driver to attempt to use up to 64 tags for ID 1.
112 * The third line is the same as the first line.
114 * The fourth line disables tagged queueing for devices 0 and 3. It
115 * enables tagged queueing for the other IDs, with 16 commands/LUN
116 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
117 * IDs 2, 5-7, and 9-15.
121 * NOTE: The below structure is for reference only, the actual structure
122 * to modify in order to change things is just below this comment block.
123 adapter_tag_info_t aic79xx_tag_info[] =
125 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
126 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
127 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
128 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
132 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
133 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
135 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
138 #define AIC79XX_CONFIGED_TAG_COMMANDS { \
139 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
150 * By default, use the number of commands specified by
151 * the users kernel configuration.
153 static adapter_tag_info_t aic79xx_tag_info[] =
155 {AIC79XX_CONFIGED_TAG_COMMANDS},
156 {AIC79XX_CONFIGED_TAG_COMMANDS},
157 {AIC79XX_CONFIGED_TAG_COMMANDS},
158 {AIC79XX_CONFIGED_TAG_COMMANDS},
159 {AIC79XX_CONFIGED_TAG_COMMANDS},
160 {AIC79XX_CONFIGED_TAG_COMMANDS},
161 {AIC79XX_CONFIGED_TAG_COMMANDS},
162 {AIC79XX_CONFIGED_TAG_COMMANDS},
163 {AIC79XX_CONFIGED_TAG_COMMANDS},
164 {AIC79XX_CONFIGED_TAG_COMMANDS},
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}
174 * The I/O cell on the chip is very configurable in respect to its analog
175 * characteristics. Set the defaults here; they can be overriden with
176 * the proper insmod parameters.
178 struct ahd_linux_iocell_opts
184 #define AIC79XX_DEFAULT_PRECOMP 0xFF
185 #define AIC79XX_DEFAULT_SLEWRATE 0xFF
186 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF
187 #define AIC79XX_DEFAULT_IOOPTS \
189 AIC79XX_DEFAULT_PRECOMP, \
190 AIC79XX_DEFAULT_SLEWRATE, \
191 AIC79XX_DEFAULT_AMPLITUDE \
193 #define AIC79XX_PRECOMP_INDEX 0
194 #define AIC79XX_SLEWRATE_INDEX 1
195 #define AIC79XX_AMPLITUDE_INDEX 2
196 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
198 AIC79XX_DEFAULT_IOOPTS,
199 AIC79XX_DEFAULT_IOOPTS,
200 AIC79XX_DEFAULT_IOOPTS,
201 AIC79XX_DEFAULT_IOOPTS,
202 AIC79XX_DEFAULT_IOOPTS,
203 AIC79XX_DEFAULT_IOOPTS,
204 AIC79XX_DEFAULT_IOOPTS,
205 AIC79XX_DEFAULT_IOOPTS,
206 AIC79XX_DEFAULT_IOOPTS,
207 AIC79XX_DEFAULT_IOOPTS,
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS
217 * There should be a specific return value for this in scsi.h, but
218 * it seems that most drivers ignore it.
220 #define DID_UNDERFLOW DID_ERROR
223 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
225 printk("(scsi%d:%c:%d:%d): ",
226 ahd->platform_data->host->host_no,
227 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
228 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
229 scb != NULL ? SCB_GET_LUN(scb) : -1);
233 * XXX - these options apply unilaterally to _all_ adapters
234 * cards in the system. This should be fixed. Exceptions to this
235 * rule are noted in the comments.
239 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
240 * has no effect on any later resets that might occur due to things like
243 static uint32_t aic79xx_no_reset;
246 * Certain PCI motherboards will scan PCI devices from highest to lowest,
247 * others scan from lowest to highest, and they tend to do all kinds of
248 * strange things when they come into contact with PCI bridge chips. The
249 * net result of all this is that the PCI card that is actually used to boot
250 * the machine is very hard to detect. Most motherboards go from lowest
251 * PCI slot number to highest, and the first SCSI controller found is the
252 * one you boot from. The only exceptions to this are when a controller
253 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
254 * from lowest PCI slot number to highest PCI slot number. We also force
255 * all controllers with their BIOS disabled to the end of the list. This
256 * works on *almost* all computers. Where it doesn't work, we have this
257 * option. Setting this option to non-0 will reverse the order of the sort
258 * to highest first, then lowest, but will still leave cards with their BIOS
259 * disabled at the very end. That should fix everyone up unless there are
260 * really strange cirumstances.
262 static uint32_t aic79xx_reverse_scan;
265 * Should we force EXTENDED translation on a controller.
266 * 0 == Use whatever is in the SEEPROM or default to off
267 * 1 == Use whatever is in the SEEPROM or default to on
269 static uint32_t aic79xx_extended;
272 * PCI bus parity checking of the Adaptec controllers. This is somewhat
273 * dubious at best. To my knowledge, this option has never actually
274 * solved a PCI parity problem, but on certain machines with broken PCI
275 * chipset configurations, it can generate tons of false error messages.
276 * It's included in the driver for completeness.
277 * 0 = Shut off PCI parity check
278 * non-0 = Enable PCI parity check
280 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
281 * variable to -1 you would actually want to simply pass the variable
282 * name without a number. That will invert the 0 which will result in
285 static uint32_t aic79xx_pci_parity = ~0;
288 * There are lots of broken chipsets in the world. Some of them will
289 * violate the PCI spec when we issue byte sized memory writes to our
290 * controller. I/O mapped register access, if allowed by the given
291 * platform, will work in almost all cases.
293 uint32_t aic79xx_allow_memio = ~0;
296 * So that we can set how long each device is given as a selection timeout.
297 * The table of values goes like this:
302 * We default to 256ms because some older devices need a longer time
303 * to respond to initial selection.
305 static uint32_t aic79xx_seltime;
308 * Certain devices do not perform any aging on commands. Should the
309 * device be saturated by commands in one portion of the disk, it is
310 * possible for transactions on far away sectors to never be serviced.
311 * To handle these devices, we can periodically send an ordered tag to
312 * force all outstanding transactions to be serviced prior to a new
315 uint32_t aic79xx_periodic_otag;
317 /* Some storage boxes are using an LSI chip which has a bug making it
318 * impossible to use aic79xx Rev B chip in 320 speeds. The following
319 * storage boxes have been reported to be buggy:
320 * EonStor 3U 16-Bay: U16U-G3A3
321 * EonStor 2U 12-Bay: U12U-G3A3
322 * SentinelRAID: 2500F R5 / R6
323 * SentinelRAID: 2500F R1
324 * SentinelRAID: 2500F/1500F
327 * To get around this LSI bug, you can set your board to 160 mode
328 * or you can enable the SLOWCRC bit.
330 uint32_t aic79xx_slowcrc;
333 * Module information and settable options.
335 static char *aic79xx = NULL;
337 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
338 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
339 MODULE_LICENSE("Dual BSD/GPL");
340 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
341 module_param(aic79xx, charp, 0444);
342 MODULE_PARM_DESC(aic79xx,
343 "period delimited, options string.\n"
344 " verbose Enable verbose/diagnostic logging\n"
345 " allow_memio Allow device registers to be memory mapped\n"
346 " debug Bitmask of debug values to enable\n"
347 " no_reset Supress initial bus resets\n"
348 " extended Enable extended geometry on all controllers\n"
349 " periodic_otag Send an ordered tagged transaction\n"
350 " periodically to prevent tag starvation.\n"
351 " This may be required by some older disk\n"
352 " or drives/RAID arrays.\n"
353 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
354 " tag_info:<tag_str> Set per-target tag depth\n"
355 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
356 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
357 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
358 " amplitude:<int> Set the signal amplitude (0-7).\n"
359 " seltime:<int> Selection Timeout:\n"
360 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
361 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
363 " Sample /etc/modprobe.conf line:\n"
364 " Enable verbose logging\n"
365 " Set tag depth on Controller 2/Target 2 to 10 tags\n"
366 " Shorten the selection timeout to 128ms\n"
368 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
371 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
372 struct scsi_device *,
374 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
375 struct scsi_cmnd *cmd);
376 static void ahd_linux_sem_timeout(u_long arg);
377 static int ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
378 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
379 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
380 struct ahd_devinfo *devinfo);
381 static void ahd_linux_device_queue_depth(struct scsi_device *);
382 static int ahd_linux_run_command(struct ahd_softc*,
383 struct ahd_linux_device *,
385 static void ahd_linux_setup_tag_info_global(char *p);
386 static int aic79xx_setup(char *c);
388 static int ahd_linux_unit;
391 /****************************** Inlines ***************************************/
392 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
395 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
397 struct scsi_cmnd *cmd;
401 direction = cmd->sc_data_direction;
402 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
403 if (cmd->use_sg != 0) {
404 struct scatterlist *sg;
406 sg = (struct scatterlist *)cmd->request_buffer;
407 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
408 } else if (cmd->request_bufflen != 0) {
409 pci_unmap_single(ahd->dev_softc,
410 scb->platform_data->buf_busaddr,
411 cmd->request_bufflen, direction);
415 /******************************** Macros **************************************/
416 #define BUILD_SCSIID(ahd, cmd) \
417 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
420 * Return a string describing the driver.
423 ahd_linux_info(struct Scsi_Host *host)
425 static char buffer[512];
428 struct ahd_softc *ahd;
431 ahd = *(struct ahd_softc **)host->hostdata;
432 memset(bp, 0, sizeof(buffer));
433 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
434 strcat(bp, AIC79XX_DRIVER_VERSION);
437 strcat(bp, ahd->description);
440 ahd_controller_info(ahd, ahd_info);
441 strcat(bp, ahd_info);
448 * Queue an SCB to the controller.
451 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
453 struct ahd_softc *ahd;
454 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
455 int rtn = SCSI_MLQUEUE_HOST_BUSY;
458 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
460 ahd_lock(ahd, &flags);
461 if (ahd->platform_data->qfrozen == 0) {
462 cmd->scsi_done = scsi_done;
463 cmd->result = CAM_REQ_INPROG << 16;
464 rtn = ahd_linux_run_command(ahd, dev, cmd);
467 ahd_unlock(ahd, &flags);
471 static inline struct scsi_target **
472 ahd_linux_target_in_softc(struct scsi_target *starget)
474 struct ahd_softc *ahd =
475 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
476 unsigned int target_offset;
478 target_offset = starget->id;
479 if (starget->channel != 0)
482 return &ahd->platform_data->starget[target_offset];
486 ahd_linux_target_alloc(struct scsi_target *starget)
488 struct ahd_softc *ahd =
489 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
491 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
492 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
493 struct ahd_devinfo devinfo;
494 struct ahd_initiator_tinfo *tinfo;
495 struct ahd_tmode_tstate *tstate;
496 char channel = starget->channel + 'A';
498 ahd_lock(ahd, &flags);
500 BUG_ON(*ahd_targp != NULL);
502 *ahd_targp = starget;
503 memset(targ, 0, sizeof(*targ));
505 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
506 starget->id, &tstate);
507 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
508 CAM_LUN_WILDCARD, channel,
510 spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
511 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
512 spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
514 spi_max_offset(starget) = MAX_OFFSET_PACED;
515 spi_max_width(starget) = ahd->features & AHD_WIDE;
517 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
518 AHD_TRANS_GOAL, /*paused*/FALSE);
519 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
520 AHD_TRANS_GOAL, /*paused*/FALSE);
521 ahd_unlock(ahd, &flags);
527 ahd_linux_target_destroy(struct scsi_target *starget)
529 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
535 ahd_linux_slave_alloc(struct scsi_device *sdev)
537 struct ahd_softc *ahd =
538 *((struct ahd_softc **)sdev->host->hostdata);
539 struct scsi_target *starget = sdev->sdev_target;
540 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
541 struct ahd_linux_device *dev;
544 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
546 BUG_ON(targ->sdev[sdev->lun] != NULL);
548 dev = scsi_transport_device_data(sdev);
549 memset(dev, 0, sizeof(*dev));
552 * We start out life using untagged
553 * transactions of which we allow one.
558 * Set maxtags to 0. This will be changed if we
559 * later determine that we are dealing with
560 * a tagged queuing capable device.
564 targ->sdev[sdev->lun] = sdev;
570 ahd_linux_slave_configure(struct scsi_device *sdev)
572 struct ahd_softc *ahd;
574 ahd = *((struct ahd_softc **)sdev->host->hostdata);
576 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
578 ahd_linux_device_queue_depth(sdev);
580 /* Initial Domain Validation */
581 if (!spi_initial_dv(sdev->sdev_target))
588 ahd_linux_slave_destroy(struct scsi_device *sdev)
590 struct ahd_softc *ahd;
591 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
592 struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
594 ahd = *((struct ahd_softc **)sdev->host->hostdata);
596 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
600 targ->sdev[sdev->lun] = NULL;
604 #if defined(__i386__)
606 * Return the disk geometry for the given SCSI device.
609 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
610 sector_t capacity, int geom[])
618 struct ahd_softc *ahd;
620 ahd = *((struct ahd_softc **)sdev->host->hostdata);
622 bh = scsi_bios_ptable(bdev);
624 ret = scsi_partsize(bh, capacity,
625 &geom[2], &geom[0], &geom[1]);
632 cylinders = aic_sector_div(capacity, heads, sectors);
634 if (aic79xx_extended != 0)
637 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
638 if (extended && cylinders >= 1024) {
641 cylinders = aic_sector_div(capacity, heads, sectors);
651 * Abort the current SCSI command(s).
654 ahd_linux_abort(struct scsi_cmnd *cmd)
658 error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
660 printf("aic79xx_abort returns 0x%x\n", error);
665 * Attempt to send a target reset message to the device that timed out.
668 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
672 error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
674 printf("aic79xx_dev_reset returns 0x%x\n", error);
679 * Reset the SCSI bus.
682 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
684 struct ahd_softc *ahd;
688 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
690 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
691 printf("%s: Bus reset called for cmd %p\n",
695 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
696 /*initiate reset*/TRUE);
700 printf("%s: SCSI bus reset delivered. "
701 "%d SCBs aborted.\n", ahd_name(ahd), found);
706 struct scsi_host_template aic79xx_driver_template = {
707 .module = THIS_MODULE,
709 .proc_name = "aic79xx",
710 .proc_info = ahd_linux_proc_info,
711 .info = ahd_linux_info,
712 .queuecommand = ahd_linux_queue,
713 .eh_abort_handler = ahd_linux_abort,
714 .eh_device_reset_handler = ahd_linux_dev_reset,
715 .eh_bus_reset_handler = ahd_linux_bus_reset,
716 #if defined(__i386__)
717 .bios_param = ahd_linux_biosparam,
719 .can_queue = AHD_MAX_QUEUE,
722 .use_clustering = ENABLE_CLUSTERING,
723 .slave_alloc = ahd_linux_slave_alloc,
724 .slave_configure = ahd_linux_slave_configure,
725 .slave_destroy = ahd_linux_slave_destroy,
726 .target_alloc = ahd_linux_target_alloc,
727 .target_destroy = ahd_linux_target_destroy,
730 /******************************** Bus DMA *************************************/
732 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
733 bus_size_t alignment, bus_size_t boundary,
734 dma_addr_t lowaddr, dma_addr_t highaddr,
735 bus_dma_filter_t *filter, void *filterarg,
736 bus_size_t maxsize, int nsegments,
737 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
741 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
746 * Linux is very simplistic about DMA memory. For now don't
747 * maintain all specification information. Once Linux supplies
748 * better facilities for doing these operations, or the
749 * needs of this particular driver change, we might need to do
752 dmat->alignment = alignment;
753 dmat->boundary = boundary;
754 dmat->maxsize = maxsize;
760 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
762 free(dmat, M_DEVBUF);
766 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
767 int flags, bus_dmamap_t *mapp)
769 *vaddr = pci_alloc_consistent(ahd->dev_softc,
770 dmat->maxsize, mapp);
777 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
778 void* vaddr, bus_dmamap_t map)
780 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
785 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
786 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
787 void *cb_arg, int flags)
790 * Assume for now that this will only be used during
791 * initialization and not for per-transaction buffer mapping.
793 bus_dma_segment_t stack_sg;
795 stack_sg.ds_addr = map;
796 stack_sg.ds_len = dmat->maxsize;
797 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
802 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
807 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
813 /********************* Platform Dependent Functions ***************************/
815 * Compare "left hand" softc with "right hand" softc, returning:
816 * < 0 - lahd has a lower priority than rahd
817 * 0 - Softcs are equal
818 * > 0 - lahd has a higher priority than rahd
821 ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
826 * Under Linux, cards are ordered as follows:
827 * 1) PCI devices that are marked as the boot controller.
828 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
829 * 3) All remaining PCI devices sorted by bus/slot/func.
832 value = (lahd->flags & AHD_BOOT_CHANNEL)
833 - (rahd->flags & AHD_BOOT_CHANNEL);
835 /* Controllers set for boot have a *higher* priority */
839 value = (lahd->flags & AHD_BIOS_ENABLED)
840 - (rahd->flags & AHD_BIOS_ENABLED);
842 /* Controllers with BIOS enabled have a *higher* priority */
845 /* Still equal. Sort by bus/slot/func. */
846 if (aic79xx_reverse_scan != 0)
847 value = ahd_get_pci_bus(lahd->dev_softc)
848 - ahd_get_pci_bus(rahd->dev_softc);
850 value = ahd_get_pci_bus(rahd->dev_softc)
851 - ahd_get_pci_bus(lahd->dev_softc);
854 if (aic79xx_reverse_scan != 0)
855 value = ahd_get_pci_slot(lahd->dev_softc)
856 - ahd_get_pci_slot(rahd->dev_softc);
858 value = ahd_get_pci_slot(rahd->dev_softc)
859 - ahd_get_pci_slot(lahd->dev_softc);
863 value = rahd->channel - lahd->channel;
868 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
872 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
873 uint8_t *iocell_info;
875 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
876 iocell_info[index] = value & 0xFFFF;
878 printf("iocell[%d:%ld] = %d\n", instance, index, value);
883 ahd_linux_setup_tag_info_global(char *p)
887 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
888 printf("Setting Global Tags= %d\n", tags);
890 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
891 for (j = 0; j < AHD_NUM_TARGETS; j++) {
892 aic79xx_tag_info[i].tag_commands[j] = tags;
898 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
901 if ((instance >= 0) && (targ >= 0)
902 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
903 && (targ < AHD_NUM_TARGETS)) {
904 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
906 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
911 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
912 void (*callback)(u_long, int, int, int32_t),
921 char tok_list[] = {'.', ',', '{', '}', '\0'};
923 /* All options use a ':' name/arg separator */
931 * Restore separator that may be in
932 * the middle of our option argument.
934 tok_end = strchr(opt_arg, '\0');
940 if (instance == -1) {
947 printf("Malformed Option %s\n",
957 else if (instance != -1)
967 else if (instance >= 0)
976 for (i = 0; tok_list[i]; i++) {
977 tok_end2 = strchr(opt_arg, tok_list[i]);
978 if ((tok_end2) && (tok_end2 < tok_end))
981 callback(callback_arg, instance, targ,
982 simple_strtol(opt_arg, NULL, 0));
991 * Handle Linux boot parameters. This routine allows for assigning a value
992 * to a parameter with a ':' between the parameter and the value.
993 * ie. aic79xx=stpwlev:1,extended
996 aic79xx_setup(char *s)
1006 { "extended", &aic79xx_extended },
1007 { "no_reset", &aic79xx_no_reset },
1008 { "verbose", &aic79xx_verbose },
1009 { "allow_memio", &aic79xx_allow_memio},
1011 { "debug", &ahd_debug },
1013 { "reverse_scan", &aic79xx_reverse_scan },
1014 { "periodic_otag", &aic79xx_periodic_otag },
1015 { "pci_parity", &aic79xx_pci_parity },
1016 { "seltime", &aic79xx_seltime },
1017 { "tag_info", NULL },
1018 { "global_tag_depth", NULL},
1019 { "slewrate", NULL },
1020 { "precomp", NULL },
1021 { "amplitude", NULL },
1022 { "slowcrc", &aic79xx_slowcrc },
1025 end = strchr(s, '\0');
1028 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1029 * will never be 0 in this case.
1033 while ((p = strsep(&s, ",.")) != NULL) {
1036 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1038 n = strlen(options[i].name);
1039 if (strncmp(options[i].name, p, n) == 0)
1042 if (i == NUM_ELEMENTS(options))
1045 if (strncmp(p, "global_tag_depth", n) == 0) {
1046 ahd_linux_setup_tag_info_global(p + n);
1047 } else if (strncmp(p, "tag_info", n) == 0) {
1048 s = ahd_parse_brace_option("tag_info", p + n, end,
1049 2, ahd_linux_setup_tag_info, 0);
1050 } else if (strncmp(p, "slewrate", n) == 0) {
1051 s = ahd_parse_brace_option("slewrate",
1052 p + n, end, 1, ahd_linux_setup_iocell_info,
1053 AIC79XX_SLEWRATE_INDEX);
1054 } else if (strncmp(p, "precomp", n) == 0) {
1055 s = ahd_parse_brace_option("precomp",
1056 p + n, end, 1, ahd_linux_setup_iocell_info,
1057 AIC79XX_PRECOMP_INDEX);
1058 } else if (strncmp(p, "amplitude", n) == 0) {
1059 s = ahd_parse_brace_option("amplitude",
1060 p + n, end, 1, ahd_linux_setup_iocell_info,
1061 AIC79XX_AMPLITUDE_INDEX);
1062 } else if (p[n] == ':') {
1063 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1064 } else if (!strncmp(p, "verbose", n)) {
1065 *(options[i].flag) = 1;
1067 *(options[i].flag) ^= 0xFFFFFFFF;
1073 __setup("aic79xx=", aic79xx_setup);
1075 uint32_t aic79xx_verbose;
1078 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1081 struct Scsi_Host *host;
1086 template->name = ahd->description;
1087 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1091 *((struct ahd_softc **)host->hostdata) = ahd;
1093 ahd->platform_data->host = host;
1094 host->can_queue = AHD_MAX_QUEUE;
1095 host->cmd_per_lun = 2;
1096 host->sg_tablesize = AHD_NSEG;
1097 host->this_id = ahd->our_id;
1098 host->irq = ahd->platform_data->irq;
1099 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1100 host->max_lun = AHD_NUM_LUNS;
1101 host->max_channel = 0;
1102 host->sg_tablesize = AHD_NSEG;
1103 ahd_set_unit(ahd, ahd_linux_unit++);
1104 sprintf(buf, "scsi%d", host->host_no);
1105 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1106 if (new_name != NULL) {
1107 strcpy(new_name, buf);
1108 ahd_set_name(ahd, new_name);
1110 host->unique_id = ahd->unit;
1111 ahd_linux_initialize_scsi_bus(ahd);
1112 ahd_intr_enable(ahd, TRUE);
1113 ahd_unlock(ahd, &s);
1115 host->transportt = ahd_linux_transport_template;
1117 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1119 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1120 scsi_host_put(host);
1124 scsi_scan_host(host);
1129 ahd_linux_get_memsize(void)
1134 return ((uint64_t)si.totalram << PAGE_SHIFT);
1138 * Place the SCSI bus into a known state by either resetting it,
1139 * or forcing transfer negotiations on the next command to any
1143 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1151 if (aic79xx_no_reset != 0)
1152 ahd->flags &= ~AHD_RESET_BUS_A;
1154 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1155 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1157 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1160 * Force negotiation to async for all targets that
1161 * will not see an initial bus reset.
1163 for (; target_id < numtarg; target_id++) {
1164 struct ahd_devinfo devinfo;
1165 struct ahd_initiator_tinfo *tinfo;
1166 struct ahd_tmode_tstate *tstate;
1168 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1169 target_id, &tstate);
1170 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1171 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1172 ahd_update_neg_request(ahd, &devinfo, tstate,
1173 tinfo, AHD_NEG_ALWAYS);
1175 /* Give the bus some time to recover */
1176 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1177 ahd_freeze_simq(ahd);
1178 init_timer(&ahd->platform_data->reset_timer);
1179 ahd->platform_data->reset_timer.data = (u_long)ahd;
1180 ahd->platform_data->reset_timer.expires =
1181 jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
1182 ahd->platform_data->reset_timer.function =
1183 (ahd_linux_callback_t *)ahd_release_simq;
1184 add_timer(&ahd->platform_data->reset_timer);
1189 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1191 ahd->platform_data =
1192 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1193 if (ahd->platform_data == NULL)
1195 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1196 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1198 init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
1199 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1204 ahd_platform_free(struct ahd_softc *ahd)
1206 struct scsi_target *starget;
1209 if (ahd->platform_data != NULL) {
1210 /* destroy all of the device and target objects */
1211 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1212 starget = ahd->platform_data->starget[i];
1213 if (starget != NULL) {
1214 for (j = 0; j < AHD_NUM_LUNS; j++) {
1215 struct ahd_linux_target *targ =
1216 scsi_transport_target_data(starget);
1217 if (targ->sdev[j] == NULL)
1219 targ->sdev[j] = NULL;
1221 ahd->platform_data->starget[i] = NULL;
1225 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1226 free_irq(ahd->platform_data->irq, ahd);
1227 if (ahd->tags[0] == BUS_SPACE_PIO
1228 && ahd->bshs[0].ioport != 0)
1229 release_region(ahd->bshs[0].ioport, 256);
1230 if (ahd->tags[1] == BUS_SPACE_PIO
1231 && ahd->bshs[1].ioport != 0)
1232 release_region(ahd->bshs[1].ioport, 256);
1233 if (ahd->tags[0] == BUS_SPACE_MEMIO
1234 && ahd->bshs[0].maddr != NULL) {
1235 iounmap(ahd->bshs[0].maddr);
1236 release_mem_region(ahd->platform_data->mem_busaddr,
1239 if (ahd->platform_data->host)
1240 scsi_host_put(ahd->platform_data->host);
1242 free(ahd->platform_data, M_DEVBUF);
1247 ahd_platform_init(struct ahd_softc *ahd)
1250 * Lookup and commit any modified IO Cell options.
1252 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1253 struct ahd_linux_iocell_opts *iocell_opts;
1255 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1256 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1257 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1258 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1259 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1260 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1261 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1267 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1269 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1270 SCB_GET_CHANNEL(ahd, scb),
1271 SCB_GET_LUN(scb), SCB_LIST_NULL,
1272 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1276 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1279 struct scsi_target *starget;
1280 struct ahd_linux_target *targ;
1281 struct ahd_linux_device *dev;
1282 struct scsi_device *sdev;
1286 starget = ahd->platform_data->starget[devinfo->target];
1287 targ = scsi_transport_target_data(starget);
1288 BUG_ON(targ == NULL);
1289 sdev = targ->sdev[devinfo->lun];
1293 dev = scsi_transport_device_data(sdev);
1297 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1300 case AHD_QUEUE_NONE:
1303 case AHD_QUEUE_BASIC:
1304 now_queuing = AHD_DEV_Q_BASIC;
1306 case AHD_QUEUE_TAGGED:
1307 now_queuing = AHD_DEV_Q_TAGGED;
1310 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1311 && (was_queuing != now_queuing)
1312 && (dev->active != 0)) {
1313 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1317 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1321 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1324 * Start out agressively and allow our
1325 * dynamic queue depth algorithm to take
1328 dev->maxtags = usertags;
1329 dev->openings = dev->maxtags - dev->active;
1331 if (dev->maxtags == 0) {
1333 * Queueing is disabled by the user.
1336 } else if (alg == AHD_QUEUE_TAGGED) {
1337 dev->flags |= AHD_DEV_Q_TAGGED;
1338 if (aic79xx_periodic_otag != 0)
1339 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1341 dev->flags |= AHD_DEV_Q_BASIC;
1343 /* We can only have one opening. */
1345 dev->openings = 1 - dev->active;
1348 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1349 case AHD_DEV_Q_BASIC:
1350 scsi_adjust_queue_depth(sdev,
1352 dev->openings + dev->active);
1354 case AHD_DEV_Q_TAGGED:
1355 scsi_adjust_queue_depth(sdev,
1357 dev->openings + dev->active);
1361 * We allow the OS to queue 2 untagged transactions to
1362 * us at any time even though we can only execute them
1363 * serially on the controller/device. This should
1364 * remove some latency.
1366 scsi_adjust_queue_depth(sdev,
1374 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1375 int lun, u_int tag, role_t role, uint32_t status)
1381 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1383 static int warned_user;
1387 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1388 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
1390 if (warned_user == 0) {
1392 "aic79xx: WARNING: Insufficient tag_info instances\n"
1393 "aic79xx: for installed controllers. Using defaults\n"
1394 "aic79xx: Please update the aic79xx_tag_info array in\n"
1395 "aic79xx: the aic79xx_osm.c source file.\n");
1398 tags = AHD_MAX_QUEUE;
1400 adapter_tag_info_t *tag_info;
1402 tag_info = &aic79xx_tag_info[ahd->unit];
1403 tags = tag_info->tag_commands[devinfo->target_offset];
1404 if (tags > AHD_MAX_QUEUE)
1405 tags = AHD_MAX_QUEUE;
1412 * Determines the queue depth for a given device.
1415 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1417 struct ahd_devinfo devinfo;
1419 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1421 ahd_compile_devinfo(&devinfo,
1423 sdev->sdev_target->id, sdev->lun,
1424 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1426 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1427 if (tags != 0 && sdev->tagged_supported != 0) {
1429 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
1430 ahd_print_devinfo(ahd, &devinfo);
1431 printf("Tagged Queuing enabled. Depth %d\n", tags);
1433 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
1438 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1439 struct scsi_cmnd *cmd)
1442 struct hardware_scb *hscb;
1443 struct ahd_initiator_tinfo *tinfo;
1444 struct ahd_tmode_tstate *tstate;
1449 * Get an scb to use.
1451 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1452 cmd->device->id, &tstate);
1453 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1454 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1455 col_idx = AHD_NEVER_COL_IDX;
1457 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1460 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1461 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1462 return SCSI_MLQUEUE_HOST_BUSY;
1466 scb->platform_data->dev = dev;
1468 cmd->host_scribble = (char *)scb;
1471 * Fill out basics of the HSCB.
1474 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1475 hscb->lun = cmd->device->lun;
1476 scb->hscb->task_management = 0;
1477 mask = SCB_GET_TARGET_MASK(ahd, scb);
1479 if ((ahd->user_discenable & mask) != 0)
1480 hscb->control |= DISCENB;
1482 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1483 scb->flags |= SCB_PACKETIZED;
1485 if ((tstate->auto_negotiate & mask) != 0) {
1486 scb->flags |= SCB_AUTO_NEGOTIATE;
1487 scb->hscb->control |= MK_MESSAGE;
1488 } else if (cmd->cmnd[0] == INQUIRY
1489 && (tinfo->curr.offset != 0
1490 || tinfo->curr.width != MSG_EXT_WDTR_BUS_8_BIT
1491 || tinfo->curr.ppr_options != 0)
1492 && (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ)==0) {
1494 * The SCSI spec requires inquiry
1495 * commands to complete without
1496 * reporting unit attention conditions.
1497 * Because of this, an inquiry command
1498 * that occurs just after a device is
1499 * reset will result in a data phase
1500 * with mismatched negotiated rates.
1501 * The core already forces a renegotiation
1502 * for reset events that are visible to
1503 * our controller or that we initiate,
1504 * but a third party device reset or a
1505 * hot-plug insertion can still cause this
1506 * issue. Therefore, we force a re-negotiation
1507 * for every inquiry command unless we
1510 scb->flags |= SCB_NEGOTIATE;
1511 scb->hscb->control |= MK_MESSAGE;
1514 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1516 uint8_t tag_msgs[2];
1518 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1519 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1520 hscb->control |= tag_msgs[0];
1521 if (tag_msgs[0] == MSG_ORDERED_TASK)
1522 dev->commands_since_idle_or_otag = 0;
1524 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1525 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1526 hscb->control |= MSG_ORDERED_TASK;
1527 dev->commands_since_idle_or_otag = 0;
1529 hscb->control |= MSG_SIMPLE_TASK;
1533 hscb->cdb_len = cmd->cmd_len;
1534 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1536 scb->platform_data->xfer_len = 0;
1537 ahd_set_residual(scb, 0);
1538 ahd_set_sense_residual(scb, 0);
1540 if (cmd->use_sg != 0) {
1542 struct scatterlist *cur_seg;
1546 cur_seg = (struct scatterlist *)cmd->request_buffer;
1547 dir = cmd->sc_data_direction;
1548 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1550 scb->platform_data->xfer_len = 0;
1551 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1555 addr = sg_dma_address(cur_seg);
1556 len = sg_dma_len(cur_seg);
1557 scb->platform_data->xfer_len += len;
1558 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1561 } else if (cmd->request_bufflen != 0) {
1567 dir = cmd->sc_data_direction;
1568 addr = pci_map_single(ahd->dev_softc,
1569 cmd->request_buffer,
1570 cmd->request_bufflen, dir);
1571 scb->platform_data->xfer_len = cmd->request_bufflen;
1572 scb->platform_data->buf_busaddr = addr;
1573 sg = ahd_sg_setup(ahd, scb, sg, addr,
1574 cmd->request_bufflen, /*last*/TRUE);
1577 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1580 dev->commands_issued++;
1582 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1583 dev->commands_since_idle_or_otag++;
1584 scb->flags |= SCB_ACTIVE;
1585 ahd_queue_scb(ahd, scb);
1591 * SCSI controller interrupt handler.
1594 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1596 struct ahd_softc *ahd;
1600 ahd = (struct ahd_softc *) dev_id;
1601 ahd_lock(ahd, &flags);
1602 ours = ahd_intr(ahd);
1603 ahd_unlock(ahd, &flags);
1604 return IRQ_RETVAL(ours);
1608 ahd_platform_flushwork(struct ahd_softc *ahd)
1614 ahd_send_async(struct ahd_softc *ahd, char channel,
1615 u_int target, u_int lun, ac_code code, void *arg)
1618 case AC_TRANSFER_NEG:
1621 struct scsi_target *starget;
1622 struct ahd_linux_target *targ;
1623 struct info_str info;
1624 struct ahd_initiator_tinfo *tinfo;
1625 struct ahd_tmode_tstate *tstate;
1626 unsigned int target_ppr_options;
1628 BUG_ON(target == CAM_TARGET_WILDCARD);
1631 info.length = sizeof(buf);
1634 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1638 * Don't bother reporting results while
1639 * negotiations are still pending.
1641 if (tinfo->curr.period != tinfo->goal.period
1642 || tinfo->curr.width != tinfo->goal.width
1643 || tinfo->curr.offset != tinfo->goal.offset
1644 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1645 if (bootverbose == 0)
1649 * Don't bother reporting results that
1650 * are identical to those last reported.
1652 starget = ahd->platform_data->starget[target];
1653 if (starget == NULL)
1655 targ = scsi_transport_target_data(starget);
1657 target_ppr_options =
1658 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1659 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1660 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1661 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1662 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1663 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1664 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1665 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1667 if (tinfo->curr.period == spi_period(starget)
1668 && tinfo->curr.width == spi_width(starget)
1669 && tinfo->curr.offset == spi_offset(starget)
1670 && tinfo->curr.ppr_options == target_ppr_options)
1671 if (bootverbose == 0)
1674 spi_period(starget) = tinfo->curr.period;
1675 spi_width(starget) = tinfo->curr.width;
1676 spi_offset(starget) = tinfo->curr.offset;
1677 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1678 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1679 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1680 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1681 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1682 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1683 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1684 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1685 spi_display_xfer_agreement(starget);
1690 WARN_ON(lun != CAM_LUN_WILDCARD);
1691 scsi_report_device_reset(ahd->platform_data->host,
1692 channel - 'A', target);
1696 if (ahd->platform_data->host != NULL) {
1697 scsi_report_bus_reset(ahd->platform_data->host,
1702 panic("ahd_send_async: Unexpected async event");
1707 * Calls the higher level scsi done function and frees the scb.
1710 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1712 struct scsi_cmnd *cmd;
1713 struct ahd_linux_device *dev;
1715 if ((scb->flags & SCB_ACTIVE) == 0) {
1716 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1717 ahd_dump_card_state(ahd);
1718 panic("Stopping for safety");
1720 LIST_REMOVE(scb, pending_links);
1722 dev = scb->platform_data->dev;
1725 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1726 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1729 ahd_linux_unmap_scb(ahd, scb);
1732 * Guard against stale sense data.
1733 * The Linux mid-layer assumes that sense
1734 * was retrieved anytime the first byte of
1735 * the sense buffer looks "sane".
1737 cmd->sense_buffer[0] = 0;
1738 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1739 uint32_t amount_xferred;
1742 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1743 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1745 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1746 ahd_print_path(ahd, scb);
1747 printf("Set CAM_UNCOR_PARITY\n");
1750 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1751 #ifdef AHD_REPORT_UNDERFLOWS
1753 * This code is disabled by default as some
1754 * clients of the SCSI system do not properly
1755 * initialize the underflow parameter. This
1756 * results in spurious termination of commands
1757 * that complete as expected (e.g. underflow is
1758 * allowed as command can return variable amounts
1761 } else if (amount_xferred < scb->io_ctx->underflow) {
1764 ahd_print_path(ahd, scb);
1766 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1767 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1769 ahd_print_path(ahd, scb);
1770 printf("Saw underflow (%ld of %ld bytes). "
1771 "Treated as error\n",
1772 ahd_get_residual(scb),
1773 ahd_get_transfer_length(scb));
1774 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1777 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1779 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1780 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1783 if (dev->openings == 1
1784 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1785 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1786 dev->tag_success_count++;
1788 * Some devices deal with temporary internal resource
1789 * shortages by returning queue full. When the queue
1790 * full occurrs, we throttle back. Slowly try to get
1791 * back to our previous queue depth.
1793 if ((dev->openings + dev->active) < dev->maxtags
1794 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1795 dev->tag_success_count = 0;
1799 if (dev->active == 0)
1800 dev->commands_since_idle_or_otag = 0;
1802 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1803 printf("Recovery SCB completes\n");
1804 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1805 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1806 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1807 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
1808 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
1809 up(&ahd->platform_data->eh_sem);
1813 ahd_free_scb(ahd, scb);
1814 ahd_linux_queue_cmd_complete(ahd, cmd);
1818 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1819 struct scsi_device *sdev, struct scb *scb)
1821 struct ahd_devinfo devinfo;
1822 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1824 ahd_compile_devinfo(&devinfo,
1826 sdev->sdev_target->id, sdev->lun,
1827 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1831 * We don't currently trust the mid-layer to
1832 * properly deal with queue full or busy. So,
1833 * when one occurs, we tell the mid-layer to
1834 * unconditionally requeue the command to us
1835 * so that we can retry it ourselves. We also
1836 * implement our own throttling mechanism so
1837 * we don't clobber the device with too many
1840 switch (ahd_get_scsi_status(scb)) {
1843 case SCSI_STATUS_CHECK_COND:
1844 case SCSI_STATUS_CMD_TERMINATED:
1846 struct scsi_cmnd *cmd;
1849 * Copy sense information to the OS's cmd
1850 * structure if it is available.
1853 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1854 struct scsi_status_iu_header *siu;
1858 if (scb->flags & SCB_SENSE) {
1859 sense_size = MIN(sizeof(struct scsi_sense_data)
1860 - ahd_get_sense_residual(scb),
1861 sizeof(cmd->sense_buffer));
1865 * Copy only the sense data into the provided
1868 siu = (struct scsi_status_iu_header *)
1870 sense_size = MIN(scsi_4btoul(siu->sense_length),
1871 sizeof(cmd->sense_buffer));
1872 sense_offset = SIU_SENSE_OFFSET(siu);
1875 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1876 memcpy(cmd->sense_buffer,
1877 ahd_get_sense_buf(ahd, scb)
1878 + sense_offset, sense_size);
1879 cmd->result |= (DRIVER_SENSE << 24);
1882 if (ahd_debug & AHD_SHOW_SENSE) {
1885 printf("Copied %d bytes of sense data at %d:",
1886 sense_size, sense_offset);
1887 for (i = 0; i < sense_size; i++) {
1890 printf("0x%x ", cmd->sense_buffer[i]);
1898 case SCSI_STATUS_QUEUE_FULL:
1900 * By the time the core driver has returned this
1901 * command, all other commands that were queued
1902 * to us but not the device have been returned.
1903 * This ensures that dev->active is equal to
1904 * the number of commands actually queued to
1907 dev->tag_success_count = 0;
1908 if (dev->active != 0) {
1910 * Drop our opening count to the number
1911 * of commands currently outstanding.
1915 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1916 ahd_print_path(ahd, scb);
1917 printf("Dropping tag count to %d\n",
1921 if (dev->active == dev->tags_on_last_queuefull) {
1923 dev->last_queuefull_same_count++;
1925 * If we repeatedly see a queue full
1926 * at the same queue depth, this
1927 * device has a fixed number of tag
1928 * slots. Lock in this tag depth
1929 * so we stop seeing queue fulls from
1932 if (dev->last_queuefull_same_count
1933 == AHD_LOCK_TAGS_COUNT) {
1934 dev->maxtags = dev->active;
1935 ahd_print_path(ahd, scb);
1936 printf("Locking max tag count at %d\n",
1940 dev->tags_on_last_queuefull = dev->active;
1941 dev->last_queuefull_same_count = 0;
1943 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1944 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1945 ahd_platform_set_tags(ahd, &devinfo,
1946 (dev->flags & AHD_DEV_Q_BASIC)
1947 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1951 * Drop down to a single opening, and treat this
1952 * as if the target returned BUSY SCSI status.
1955 ahd_platform_set_tags(ahd, &devinfo,
1956 (dev->flags & AHD_DEV_Q_BASIC)
1957 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1958 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1963 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1966 * Map CAM error codes into Linux Error codes. We
1967 * avoid the conversion so that the DV code has the
1968 * full error information available when making
1969 * state change decisions.
1975 status = ahd_cmd_get_transaction_status(cmd);
1977 case CAM_REQ_INPROG:
1979 case CAM_SCSI_STATUS_ERROR:
1980 new_status = DID_OK;
1982 case CAM_REQ_ABORTED:
1983 new_status = DID_ABORT;
1986 new_status = DID_BUS_BUSY;
1988 case CAM_REQ_INVALID:
1989 case CAM_PATH_INVALID:
1990 new_status = DID_BAD_TARGET;
1992 case CAM_SEL_TIMEOUT:
1993 new_status = DID_NO_CONNECT;
1995 case CAM_SCSI_BUS_RESET:
1997 new_status = DID_RESET;
1999 case CAM_UNCOR_PARITY:
2000 new_status = DID_PARITY;
2002 case CAM_CMD_TIMEOUT:
2003 new_status = DID_TIME_OUT;
2006 case CAM_REQ_CMP_ERR:
2007 case CAM_AUTOSENSE_FAIL:
2009 case CAM_DATA_RUN_ERR:
2010 case CAM_UNEXP_BUSFREE:
2011 case CAM_SEQUENCE_FAIL:
2012 case CAM_CCB_LEN_ERR:
2013 case CAM_PROVIDE_FAIL:
2014 case CAM_REQ_TERMIO:
2015 case CAM_UNREC_HBA_ERROR:
2016 case CAM_REQ_TOO_BIG:
2017 new_status = DID_ERROR;
2019 case CAM_REQUEUE_REQ:
2020 new_status = DID_REQUEUE;
2023 /* We should never get here */
2024 new_status = DID_ERROR;
2028 ahd_cmd_set_transaction_status(cmd, new_status);
2031 cmd->scsi_done(cmd);
2035 ahd_linux_sem_timeout(u_long arg)
2037 struct ahd_softc *ahd;
2040 ahd = (struct ahd_softc *)arg;
2043 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
2044 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
2045 up(&ahd->platform_data->eh_sem);
2047 ahd_unlock(ahd, &s);
2051 ahd_freeze_simq(struct ahd_softc *ahd)
2053 ahd->platform_data->qfrozen++;
2054 if (ahd->platform_data->qfrozen == 1) {
2055 scsi_block_requests(ahd->platform_data->host);
2056 ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2057 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2058 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2063 ahd_release_simq(struct ahd_softc *ahd)
2070 if (ahd->platform_data->qfrozen > 0)
2071 ahd->platform_data->qfrozen--;
2072 if (ahd->platform_data->qfrozen == 0) {
2075 ahd_unlock(ahd, &s);
2077 * There is still a race here. The mid-layer
2078 * should keep its own freeze count and use
2079 * a bottom half handler to run the queues
2080 * so we can unblock with our own lock held.
2083 scsi_unblock_requests(ahd->platform_data->host);
2087 ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2089 struct ahd_softc *ahd;
2090 struct ahd_linux_device *dev;
2091 struct scb *pending_scb;
2093 u_int active_scbptr;
2103 ahd_mode_state saved_modes;
2104 unsigned long flags;
2109 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2111 scmd_printk(KERN_INFO, cmd,
2112 "Attempting to queue a%s message:",
2113 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2116 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2117 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2120 ahd_lock(ahd, &flags);
2123 * First determine if we currently own this command.
2124 * Start by searching the device queue. If not found
2125 * there, check the pending_scb list. If not found
2126 * at all, and the system wanted us to just abort the
2127 * command, return success.
2129 dev = scsi_transport_device_data(cmd->device);
2133 * No target device for this command exists,
2134 * so we must not still own the command.
2136 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2142 * See if we can find a matching cmd in the pending list.
2144 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2145 if (pending_scb->io_ctx == cmd)
2149 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2151 /* Any SCB for this device will do for a target reset */
2152 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2153 if (ahd_match_scb(ahd, pending_scb,
2155 scmd_channel(cmd) + 'A',
2157 SCB_LIST_NULL, ROLE_INITIATOR))
2162 if (pending_scb == NULL) {
2163 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2167 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2169 * We can't queue two recovery actions using the same SCB
2176 * Ensure that the card doesn't do anything
2177 * behind our back. Also make sure that we
2178 * didn't "just" miss an interrupt that would
2181 was_paused = ahd_is_paused(ahd);
2182 ahd_pause_and_flushwork(ahd);
2185 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2186 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2190 printf("%s: At time of recovery, card was %spaused\n",
2191 ahd_name(ahd), was_paused ? "" : "not ");
2192 ahd_dump_card_state(ahd);
2194 disconnected = TRUE;
2195 if (flag == SCB_ABORT) {
2196 if (ahd_search_qinfifo(ahd, cmd->device->id,
2197 cmd->device->channel + 'A',
2199 pending_scb->hscb->tag,
2200 ROLE_INITIATOR, CAM_REQ_ABORTED,
2201 SEARCH_COMPLETE) > 0) {
2202 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2203 ahd_name(ahd), cmd->device->channel,
2204 cmd->device->id, cmd->device->lun);
2208 } else if (ahd_search_qinfifo(ahd, cmd->device->id,
2209 cmd->device->channel + 'A',
2210 cmd->device->lun, pending_scb->hscb->tag,
2211 ROLE_INITIATOR, /*status*/0,
2212 SEARCH_COUNT) > 0) {
2213 disconnected = FALSE;
2216 saved_modes = ahd_save_modes(ahd);
2217 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2218 last_phase = ahd_inb(ahd, LASTPHASE);
2219 saved_scbptr = ahd_get_scbptr(ahd);
2220 active_scbptr = saved_scbptr;
2221 if (disconnected && ((last_phase != P_BUSFREE) ||
2222 (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0)) {
2223 struct scb *bus_scb;
2225 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2226 if (bus_scb == pending_scb)
2227 disconnected = FALSE;
2228 else if (flag != SCB_ABORT
2229 && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
2230 && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2231 disconnected = FALSE;
2235 * At this point, pending_scb is the scb associated with the
2236 * passed in command. That command is currently active on the
2237 * bus or is in the disconnected state.
2239 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2240 if (SCB_GET_TAG(pending_scb) == active_scbptr
2241 || (flag == SCB_DEVICE_RESET
2242 && SCSIID_TARGET(ahd, saved_scsiid) == scmd_id(cmd))) {
2245 * We're active on the bus, so assert ATN
2246 * and hope that the target responds.
2248 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2249 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_DEVICE_RESET;
2250 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2251 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2252 scmd_printk(KERN_INFO, cmd, "BDR message in message buffer\n");
2254 } else if (last_phase != P_BUSFREE
2255 && ahd_inb(ahd, SCSIPHASE) == 0) {
2257 * SCB is not identified, there
2258 * is no pending REQ, and the sequencer
2259 * has not seen a busfree. Looks like
2260 * a stuck connection waiting to
2261 * go busfree. Reset the bus.
2263 found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
2264 /*Initiate Reset*/TRUE);
2265 printf("%s: Issued Channel %c Bus Reset. "
2266 "%d SCBs aborted\n", ahd_name(ahd),
2267 cmd->device->channel + 'A', found);
2268 } else if (disconnected) {
2271 * Actually re-queue this SCB in an attempt
2272 * to select the device before it reconnects.
2274 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2275 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2276 pending_scb->hscb->cdb_len = 0;
2277 pending_scb->hscb->task_attribute = 0;
2278 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2280 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2282 * Mark the SCB has having an outstanding
2283 * task management function. Should the command
2284 * complete normally before the task management
2285 * function can be sent, the host will be notified
2286 * to abort our requeued SCB.
2288 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2289 pending_scb->hscb->task_management);
2292 * If non-packetized, set the MK_MESSAGE control
2293 * bit indicating that we desire to send a message.
2294 * We also set the disconnected flag since there is
2295 * no guarantee that our SCB control byte matches
2296 * the version on the card. We don't want the
2297 * sequencer to abort the command thinking an
2298 * unsolicited reselection occurred.
2300 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2303 * The sequencer will never re-reference the
2304 * in-core SCB. To make sure we are notified
2305 * during reslection, set the MK_MESSAGE flag in
2306 * the card's copy of the SCB.
2308 ahd_outb(ahd, SCB_CONTROL,
2309 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2313 * Clear out any entries in the QINFIFO first
2314 * so we are the next SCB for this target
2317 ahd_search_qinfifo(ahd, cmd->device->id,
2318 cmd->device->channel + 'A', cmd->device->lun,
2319 SCB_LIST_NULL, ROLE_INITIATOR,
2320 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2321 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2322 ahd_set_scbptr(ahd, saved_scbptr);
2323 ahd_print_path(ahd, pending_scb);
2324 printf("Device is disconnected, re-queuing SCB\n");
2327 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2334 * Our assumption is that if we don't have the command, no
2335 * recovery action was required, so we return success. Again,
2336 * the semantics of the mid-layer recovery engine are not
2337 * well defined, so this may change in time.
2344 struct timer_list timer;
2347 ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM;
2348 ahd_unlock(ahd, &flags);
2351 timer.data = (u_long)ahd;
2352 timer.expires = jiffies + (5 * HZ);
2353 timer.function = ahd_linux_sem_timeout;
2355 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2356 down(&ahd->platform_data->eh_sem);
2357 printf("%s: Recovery code awake\n", ahd_name(ahd));
2358 ret = del_timer_sync(&timer);
2360 printf("%s: Timer Expired (active %d)\n",
2361 ahd_name(ahd), dev->active);
2365 ahd_unlock(ahd, &flags);
2369 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2371 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2372 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2373 struct ahd_devinfo devinfo;
2374 unsigned long flags;
2376 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2377 starget->channel + 'A', ROLE_INITIATOR);
2378 ahd_lock(ahd, &flags);
2379 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2380 ahd_unlock(ahd, &flags);
2383 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2385 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2386 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2387 struct ahd_tmode_tstate *tstate;
2388 struct ahd_initiator_tinfo *tinfo
2389 = ahd_fetch_transinfo(ahd,
2390 starget->channel + 'A',
2391 shost->this_id, starget->id, &tstate);
2392 struct ahd_devinfo devinfo;
2393 unsigned int ppr_options = tinfo->goal.ppr_options;
2395 unsigned long flags;
2396 unsigned long offset = tinfo->goal.offset;
2399 if ((ahd_debug & AHD_SHOW_DV) != 0)
2400 printf("%s: set period to %d\n", ahd_name(ahd), period);
2403 offset = MAX_OFFSET;
2408 ppr_options |= MSG_EXT_PPR_DT_REQ;
2410 ppr_options |= MSG_EXT_PPR_IU_REQ;
2413 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2415 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2416 starget->channel + 'A', ROLE_INITIATOR);
2418 /* all PPR requests apart from QAS require wide transfers */
2419 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2420 if (spi_width(starget) == 0)
2421 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2424 ahd_find_syncrate(ahd, &period, &ppr_options,
2425 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2427 ahd_lock(ahd, &flags);
2428 ahd_set_syncrate(ahd, &devinfo, period, offset,
2429 ppr_options, AHD_TRANS_GOAL, FALSE);
2430 ahd_unlock(ahd, &flags);
2433 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2435 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2436 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2437 struct ahd_tmode_tstate *tstate;
2438 struct ahd_initiator_tinfo *tinfo
2439 = ahd_fetch_transinfo(ahd,
2440 starget->channel + 'A',
2441 shost->this_id, starget->id, &tstate);
2442 struct ahd_devinfo devinfo;
2443 unsigned int ppr_options = 0;
2444 unsigned int period = 0;
2445 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2446 unsigned long flags;
2449 if ((ahd_debug & AHD_SHOW_DV) != 0)
2450 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2453 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2454 starget->channel + 'A', ROLE_INITIATOR);
2456 period = tinfo->goal.period;
2457 ppr_options = tinfo->goal.ppr_options;
2458 ahd_find_syncrate(ahd, &period, &ppr_options,
2459 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2462 ahd_lock(ahd, &flags);
2463 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2464 AHD_TRANS_GOAL, FALSE);
2465 ahd_unlock(ahd, &flags);
2468 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2470 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2471 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2472 struct ahd_tmode_tstate *tstate;
2473 struct ahd_initiator_tinfo *tinfo
2474 = ahd_fetch_transinfo(ahd,
2475 starget->channel + 'A',
2476 shost->this_id, starget->id, &tstate);
2477 struct ahd_devinfo devinfo;
2478 unsigned int ppr_options = tinfo->goal.ppr_options
2479 & ~MSG_EXT_PPR_DT_REQ;
2480 unsigned int period = tinfo->goal.period;
2481 unsigned int width = tinfo->goal.width;
2482 unsigned long flags;
2485 if ((ahd_debug & AHD_SHOW_DV) != 0)
2486 printf("%s: %s DT\n", ahd_name(ahd),
2487 dt ? "enabling" : "disabling");
2490 ppr_options |= MSG_EXT_PPR_DT_REQ;
2492 ahd_linux_set_width(starget, 1);
2495 period = 10; /* If resetting DT, period must be >= 25ns */
2496 /* IU is invalid without DT set */
2497 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2499 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2500 starget->channel + 'A', ROLE_INITIATOR);
2501 ahd_find_syncrate(ahd, &period, &ppr_options,
2502 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2504 ahd_lock(ahd, &flags);
2505 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2506 ppr_options, AHD_TRANS_GOAL, FALSE);
2507 ahd_unlock(ahd, &flags);
2510 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2512 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2513 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2514 struct ahd_tmode_tstate *tstate;
2515 struct ahd_initiator_tinfo *tinfo
2516 = ahd_fetch_transinfo(ahd,
2517 starget->channel + 'A',
2518 shost->this_id, starget->id, &tstate);
2519 struct ahd_devinfo devinfo;
2520 unsigned int ppr_options = tinfo->goal.ppr_options
2521 & ~MSG_EXT_PPR_QAS_REQ;
2522 unsigned int period = tinfo->goal.period;
2524 unsigned long flags;
2527 if ((ahd_debug & AHD_SHOW_DV) != 0)
2528 printf("%s: %s QAS\n", ahd_name(ahd),
2529 qas ? "enabling" : "disabling");
2533 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2536 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2538 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2539 starget->channel + 'A', ROLE_INITIATOR);
2540 ahd_find_syncrate(ahd, &period, &ppr_options,
2541 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2543 ahd_lock(ahd, &flags);
2544 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2545 ppr_options, AHD_TRANS_GOAL, FALSE);
2546 ahd_unlock(ahd, &flags);
2549 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2551 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2552 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2553 struct ahd_tmode_tstate *tstate;
2554 struct ahd_initiator_tinfo *tinfo
2555 = ahd_fetch_transinfo(ahd,
2556 starget->channel + 'A',
2557 shost->this_id, starget->id, &tstate);
2558 struct ahd_devinfo devinfo;
2559 unsigned int ppr_options = tinfo->goal.ppr_options
2560 & ~MSG_EXT_PPR_IU_REQ;
2561 unsigned int period = tinfo->goal.period;
2563 unsigned long flags;
2566 if ((ahd_debug & AHD_SHOW_DV) != 0)
2567 printf("%s: %s IU\n", ahd_name(ahd),
2568 iu ? "enabling" : "disabling");
2572 ppr_options |= MSG_EXT_PPR_IU_REQ;
2573 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2576 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2578 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2579 starget->channel + 'A', ROLE_INITIATOR);
2580 ahd_find_syncrate(ahd, &period, &ppr_options,
2581 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2583 ahd_lock(ahd, &flags);
2584 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2585 ppr_options, AHD_TRANS_GOAL, FALSE);
2586 ahd_unlock(ahd, &flags);
2589 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2591 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2592 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2593 struct ahd_tmode_tstate *tstate;
2594 struct ahd_initiator_tinfo *tinfo
2595 = ahd_fetch_transinfo(ahd,
2596 starget->channel + 'A',
2597 shost->this_id, starget->id, &tstate);
2598 struct ahd_devinfo devinfo;
2599 unsigned int ppr_options = tinfo->goal.ppr_options
2600 & ~MSG_EXT_PPR_RD_STRM;
2601 unsigned int period = tinfo->goal.period;
2602 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2603 unsigned long flags;
2606 if ((ahd_debug & AHD_SHOW_DV) != 0)
2607 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2608 rdstrm ? "enabling" : "disabling");
2612 ppr_options |= MSG_EXT_PPR_RD_STRM;
2614 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2615 starget->channel + 'A', ROLE_INITIATOR);
2616 ahd_find_syncrate(ahd, &period, &ppr_options,
2617 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2619 ahd_lock(ahd, &flags);
2620 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2621 ppr_options, AHD_TRANS_GOAL, FALSE);
2622 ahd_unlock(ahd, &flags);
2625 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2627 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2628 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2629 struct ahd_tmode_tstate *tstate;
2630 struct ahd_initiator_tinfo *tinfo
2631 = ahd_fetch_transinfo(ahd,
2632 starget->channel + 'A',
2633 shost->this_id, starget->id, &tstate);
2634 struct ahd_devinfo devinfo;
2635 unsigned int ppr_options = tinfo->goal.ppr_options
2636 & ~MSG_EXT_PPR_WR_FLOW;
2637 unsigned int period = tinfo->goal.period;
2638 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2639 unsigned long flags;
2642 if ((ahd_debug & AHD_SHOW_DV) != 0)
2643 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2644 wrflow ? "enabling" : "disabling");
2648 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2650 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2651 starget->channel + 'A', ROLE_INITIATOR);
2652 ahd_find_syncrate(ahd, &period, &ppr_options,
2653 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2655 ahd_lock(ahd, &flags);
2656 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2657 ppr_options, AHD_TRANS_GOAL, FALSE);
2658 ahd_unlock(ahd, &flags);
2661 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2663 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2664 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2665 struct ahd_tmode_tstate *tstate;
2666 struct ahd_initiator_tinfo *tinfo
2667 = ahd_fetch_transinfo(ahd,
2668 starget->channel + 'A',
2669 shost->this_id, starget->id, &tstate);
2670 struct ahd_devinfo devinfo;
2671 unsigned int ppr_options = tinfo->goal.ppr_options
2673 unsigned int period = tinfo->goal.period;
2674 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2675 unsigned long flags;
2677 if ((ahd->features & AHD_RTI) == 0) {
2679 if ((ahd_debug & AHD_SHOW_DV) != 0)
2680 printf("%s: RTI not available\n", ahd_name(ahd));
2686 if ((ahd_debug & AHD_SHOW_DV) != 0)
2687 printf("%s: %s RTI\n", ahd_name(ahd),
2688 rti ? "enabling" : "disabling");
2692 ppr_options |= MSG_EXT_PPR_RTI;
2694 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2695 starget->channel + 'A', ROLE_INITIATOR);
2696 ahd_find_syncrate(ahd, &period, &ppr_options,
2697 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2699 ahd_lock(ahd, &flags);
2700 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2701 ppr_options, AHD_TRANS_GOAL, FALSE);
2702 ahd_unlock(ahd, &flags);
2705 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2707 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2708 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2709 struct ahd_tmode_tstate *tstate;
2710 struct ahd_initiator_tinfo *tinfo
2711 = ahd_fetch_transinfo(ahd,
2712 starget->channel + 'A',
2713 shost->this_id, starget->id, &tstate);
2714 struct ahd_devinfo devinfo;
2715 unsigned int ppr_options = tinfo->goal.ppr_options
2716 & ~MSG_EXT_PPR_PCOMP_EN;
2717 unsigned int period = tinfo->goal.period;
2718 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2719 unsigned long flags;
2722 if ((ahd_debug & AHD_SHOW_DV) != 0)
2723 printf("%s: %s Precompensation\n", ahd_name(ahd),
2724 pcomp ? "Enable" : "Disable");
2728 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2730 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2731 starget->channel + 'A', ROLE_INITIATOR);
2732 ahd_find_syncrate(ahd, &period, &ppr_options,
2733 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2735 ahd_lock(ahd, &flags);
2736 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2737 ppr_options, AHD_TRANS_GOAL, FALSE);
2738 ahd_unlock(ahd, &flags);
2741 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2743 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2744 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2745 struct ahd_tmode_tstate *tstate;
2746 struct ahd_initiator_tinfo *tinfo
2747 = ahd_fetch_transinfo(ahd,
2748 starget->channel + 'A',
2749 shost->this_id, starget->id, &tstate);
2750 struct ahd_devinfo devinfo;
2751 unsigned int ppr_options = tinfo->goal.ppr_options
2752 & ~MSG_EXT_PPR_HOLD_MCS;
2753 unsigned int period = tinfo->goal.period;
2754 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2755 unsigned long flags;
2758 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2760 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2761 starget->channel + 'A', ROLE_INITIATOR);
2762 ahd_find_syncrate(ahd, &period, &ppr_options,
2763 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2765 ahd_lock(ahd, &flags);
2766 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2767 ppr_options, AHD_TRANS_GOAL, FALSE);
2768 ahd_unlock(ahd, &flags);
2773 static struct spi_function_template ahd_linux_transport_functions = {
2774 .set_offset = ahd_linux_set_offset,
2776 .set_period = ahd_linux_set_period,
2778 .set_width = ahd_linux_set_width,
2780 .set_dt = ahd_linux_set_dt,
2782 .set_iu = ahd_linux_set_iu,
2784 .set_qas = ahd_linux_set_qas,
2786 .set_rd_strm = ahd_linux_set_rd_strm,
2788 .set_wr_flow = ahd_linux_set_wr_flow,
2790 .set_rti = ahd_linux_set_rti,
2792 .set_pcomp_en = ahd_linux_set_pcomp_en,
2794 .set_hold_mcs = ahd_linux_set_hold_mcs,
2799 ahd_linux_init(void)
2804 * If we've been passed any parameters, process them now.
2807 aic79xx_setup(aic79xx);
2809 ahd_linux_transport_template =
2810 spi_attach_transport(&ahd_linux_transport_functions);
2811 if (!ahd_linux_transport_template)
2814 scsi_transport_reserve_target(ahd_linux_transport_template,
2815 sizeof(struct ahd_linux_target));
2816 scsi_transport_reserve_device(ahd_linux_transport_template,
2817 sizeof(struct ahd_linux_device));
2819 error = ahd_linux_pci_init();
2821 spi_release_transport(ahd_linux_transport_template);
2826 ahd_linux_exit(void)
2828 ahd_linux_pci_exit();
2829 spi_release_transport(ahd_linux_transport_template);
2832 module_init(ahd_linux_init);
2833 module_exit(ahd_linux_exit);