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 int ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
377 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
378 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
379 struct ahd_devinfo *devinfo);
380 static void ahd_linux_device_queue_depth(struct scsi_device *);
381 static int ahd_linux_run_command(struct ahd_softc*,
382 struct ahd_linux_device *,
384 static void ahd_linux_setup_tag_info_global(char *p);
385 static int aic79xx_setup(char *c);
387 static int ahd_linux_unit;
390 /****************************** Inlines ***************************************/
391 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
394 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
396 struct scsi_cmnd *cmd;
400 direction = cmd->sc_data_direction;
401 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
402 if (cmd->use_sg != 0) {
403 struct scatterlist *sg;
405 sg = (struct scatterlist *)cmd->request_buffer;
406 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
407 } else if (cmd->request_bufflen != 0) {
408 pci_unmap_single(ahd->dev_softc,
409 scb->platform_data->buf_busaddr,
410 cmd->request_bufflen, direction);
414 /******************************** Macros **************************************/
415 #define BUILD_SCSIID(ahd, cmd) \
416 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
419 * Return a string describing the driver.
422 ahd_linux_info(struct Scsi_Host *host)
424 static char buffer[512];
427 struct ahd_softc *ahd;
430 ahd = *(struct ahd_softc **)host->hostdata;
431 memset(bp, 0, sizeof(buffer));
432 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
433 strcat(bp, AIC79XX_DRIVER_VERSION);
436 strcat(bp, ahd->description);
439 ahd_controller_info(ahd, ahd_info);
440 strcat(bp, ahd_info);
447 * Queue an SCB to the controller.
450 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
452 struct ahd_softc *ahd;
453 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
454 int rtn = SCSI_MLQUEUE_HOST_BUSY;
456 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
458 cmd->scsi_done = scsi_done;
459 cmd->result = CAM_REQ_INPROG << 16;
460 rtn = ahd_linux_run_command(ahd, dev, cmd);
465 static inline struct scsi_target **
466 ahd_linux_target_in_softc(struct scsi_target *starget)
468 struct ahd_softc *ahd =
469 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
470 unsigned int target_offset;
472 target_offset = starget->id;
473 if (starget->channel != 0)
476 return &ahd->platform_data->starget[target_offset];
480 ahd_linux_target_alloc(struct scsi_target *starget)
482 struct ahd_softc *ahd =
483 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
485 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
486 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
487 struct ahd_devinfo devinfo;
488 struct ahd_initiator_tinfo *tinfo;
489 struct ahd_tmode_tstate *tstate;
490 char channel = starget->channel + 'A';
492 ahd_lock(ahd, &flags);
494 BUG_ON(*ahd_targp != NULL);
496 *ahd_targp = starget;
497 memset(targ, 0, sizeof(*targ));
499 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
500 starget->id, &tstate);
501 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
502 CAM_LUN_WILDCARD, channel,
504 spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
505 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
506 spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
508 spi_max_offset(starget) = MAX_OFFSET_PACED;
509 spi_max_width(starget) = ahd->features & AHD_WIDE;
511 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
512 AHD_TRANS_GOAL, /*paused*/FALSE);
513 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
514 AHD_TRANS_GOAL, /*paused*/FALSE);
515 ahd_unlock(ahd, &flags);
521 ahd_linux_target_destroy(struct scsi_target *starget)
523 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
529 ahd_linux_slave_alloc(struct scsi_device *sdev)
531 struct ahd_softc *ahd =
532 *((struct ahd_softc **)sdev->host->hostdata);
533 struct scsi_target *starget = sdev->sdev_target;
534 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
535 struct ahd_linux_device *dev;
538 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
540 BUG_ON(targ->sdev[sdev->lun] != NULL);
542 dev = scsi_transport_device_data(sdev);
543 memset(dev, 0, sizeof(*dev));
546 * We start out life using untagged
547 * transactions of which we allow one.
552 * Set maxtags to 0. This will be changed if we
553 * later determine that we are dealing with
554 * a tagged queuing capable device.
558 targ->sdev[sdev->lun] = sdev;
564 ahd_linux_slave_configure(struct scsi_device *sdev)
566 struct ahd_softc *ahd;
568 ahd = *((struct ahd_softc **)sdev->host->hostdata);
570 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
572 ahd_linux_device_queue_depth(sdev);
574 /* Initial Domain Validation */
575 if (!spi_initial_dv(sdev->sdev_target))
582 ahd_linux_slave_destroy(struct scsi_device *sdev)
584 struct ahd_softc *ahd;
585 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
586 struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
588 ahd = *((struct ahd_softc **)sdev->host->hostdata);
590 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
594 targ->sdev[sdev->lun] = NULL;
598 #if defined(__i386__)
600 * Return the disk geometry for the given SCSI device.
603 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
604 sector_t capacity, int geom[])
612 struct ahd_softc *ahd;
614 ahd = *((struct ahd_softc **)sdev->host->hostdata);
616 bh = scsi_bios_ptable(bdev);
618 ret = scsi_partsize(bh, capacity,
619 &geom[2], &geom[0], &geom[1]);
626 cylinders = aic_sector_div(capacity, heads, sectors);
628 if (aic79xx_extended != 0)
631 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
632 if (extended && cylinders >= 1024) {
635 cylinders = aic_sector_div(capacity, heads, sectors);
645 * Abort the current SCSI command(s).
648 ahd_linux_abort(struct scsi_cmnd *cmd)
652 error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
654 printf("aic79xx_abort returns 0x%x\n", error);
659 * Attempt to send a target reset message to the device that timed out.
662 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
666 error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
668 printf("aic79xx_dev_reset returns 0x%x\n", error);
673 * Reset the SCSI bus.
676 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
678 struct ahd_softc *ahd;
681 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
683 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
684 printf("%s: Bus reset called for cmd %p\n",
687 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
688 /*initiate reset*/TRUE);
691 printf("%s: SCSI bus reset delivered. "
692 "%d SCBs aborted.\n", ahd_name(ahd), found);
697 struct scsi_host_template aic79xx_driver_template = {
698 .module = THIS_MODULE,
700 .proc_name = "aic79xx",
701 .proc_info = ahd_linux_proc_info,
702 .info = ahd_linux_info,
703 .queuecommand = ahd_linux_queue,
704 .eh_abort_handler = ahd_linux_abort,
705 .eh_device_reset_handler = ahd_linux_dev_reset,
706 .eh_bus_reset_handler = ahd_linux_bus_reset,
707 #if defined(__i386__)
708 .bios_param = ahd_linux_biosparam,
710 .can_queue = AHD_MAX_QUEUE,
713 .use_clustering = ENABLE_CLUSTERING,
714 .slave_alloc = ahd_linux_slave_alloc,
715 .slave_configure = ahd_linux_slave_configure,
716 .slave_destroy = ahd_linux_slave_destroy,
717 .target_alloc = ahd_linux_target_alloc,
718 .target_destroy = ahd_linux_target_destroy,
721 /******************************** Bus DMA *************************************/
723 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
724 bus_size_t alignment, bus_size_t boundary,
725 dma_addr_t lowaddr, dma_addr_t highaddr,
726 bus_dma_filter_t *filter, void *filterarg,
727 bus_size_t maxsize, int nsegments,
728 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
732 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
737 * Linux is very simplistic about DMA memory. For now don't
738 * maintain all specification information. Once Linux supplies
739 * better facilities for doing these operations, or the
740 * needs of this particular driver change, we might need to do
743 dmat->alignment = alignment;
744 dmat->boundary = boundary;
745 dmat->maxsize = maxsize;
751 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
753 free(dmat, M_DEVBUF);
757 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
758 int flags, bus_dmamap_t *mapp)
760 *vaddr = pci_alloc_consistent(ahd->dev_softc,
761 dmat->maxsize, mapp);
768 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
769 void* vaddr, bus_dmamap_t map)
771 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
776 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
777 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
778 void *cb_arg, int flags)
781 * Assume for now that this will only be used during
782 * initialization and not for per-transaction buffer mapping.
784 bus_dma_segment_t stack_sg;
786 stack_sg.ds_addr = map;
787 stack_sg.ds_len = dmat->maxsize;
788 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
793 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
798 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
804 /********************* Platform Dependent Functions ***************************/
806 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
810 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
811 uint8_t *iocell_info;
813 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
814 iocell_info[index] = value & 0xFFFF;
816 printf("iocell[%d:%ld] = %d\n", instance, index, value);
821 ahd_linux_setup_tag_info_global(char *p)
825 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
826 printf("Setting Global Tags= %d\n", tags);
828 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
829 for (j = 0; j < AHD_NUM_TARGETS; j++) {
830 aic79xx_tag_info[i].tag_commands[j] = tags;
836 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
839 if ((instance >= 0) && (targ >= 0)
840 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
841 && (targ < AHD_NUM_TARGETS)) {
842 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
844 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
849 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
850 void (*callback)(u_long, int, int, int32_t),
859 char tok_list[] = {'.', ',', '{', '}', '\0'};
861 /* All options use a ':' name/arg separator */
869 * Restore separator that may be in
870 * the middle of our option argument.
872 tok_end = strchr(opt_arg, '\0');
878 if (instance == -1) {
885 printf("Malformed Option %s\n",
895 else if (instance != -1)
905 else if (instance >= 0)
914 for (i = 0; tok_list[i]; i++) {
915 tok_end2 = strchr(opt_arg, tok_list[i]);
916 if ((tok_end2) && (tok_end2 < tok_end))
919 callback(callback_arg, instance, targ,
920 simple_strtol(opt_arg, NULL, 0));
929 * Handle Linux boot parameters. This routine allows for assigning a value
930 * to a parameter with a ':' between the parameter and the value.
931 * ie. aic79xx=stpwlev:1,extended
934 aic79xx_setup(char *s)
944 { "extended", &aic79xx_extended },
945 { "no_reset", &aic79xx_no_reset },
946 { "verbose", &aic79xx_verbose },
947 { "allow_memio", &aic79xx_allow_memio},
949 { "debug", &ahd_debug },
951 { "reverse_scan", &aic79xx_reverse_scan },
952 { "periodic_otag", &aic79xx_periodic_otag },
953 { "pci_parity", &aic79xx_pci_parity },
954 { "seltime", &aic79xx_seltime },
955 { "tag_info", NULL },
956 { "global_tag_depth", NULL},
957 { "slewrate", NULL },
959 { "amplitude", NULL },
960 { "slowcrc", &aic79xx_slowcrc },
963 end = strchr(s, '\0');
966 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
967 * will never be 0 in this case.
971 while ((p = strsep(&s, ",.")) != NULL) {
974 for (i = 0; i < NUM_ELEMENTS(options); i++) {
976 n = strlen(options[i].name);
977 if (strncmp(options[i].name, p, n) == 0)
980 if (i == NUM_ELEMENTS(options))
983 if (strncmp(p, "global_tag_depth", n) == 0) {
984 ahd_linux_setup_tag_info_global(p + n);
985 } else if (strncmp(p, "tag_info", n) == 0) {
986 s = ahd_parse_brace_option("tag_info", p + n, end,
987 2, ahd_linux_setup_tag_info, 0);
988 } else if (strncmp(p, "slewrate", n) == 0) {
989 s = ahd_parse_brace_option("slewrate",
990 p + n, end, 1, ahd_linux_setup_iocell_info,
991 AIC79XX_SLEWRATE_INDEX);
992 } else if (strncmp(p, "precomp", n) == 0) {
993 s = ahd_parse_brace_option("precomp",
994 p + n, end, 1, ahd_linux_setup_iocell_info,
995 AIC79XX_PRECOMP_INDEX);
996 } else if (strncmp(p, "amplitude", n) == 0) {
997 s = ahd_parse_brace_option("amplitude",
998 p + n, end, 1, ahd_linux_setup_iocell_info,
999 AIC79XX_AMPLITUDE_INDEX);
1000 } else if (p[n] == ':') {
1001 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1002 } else if (!strncmp(p, "verbose", n)) {
1003 *(options[i].flag) = 1;
1005 *(options[i].flag) ^= 0xFFFFFFFF;
1011 __setup("aic79xx=", aic79xx_setup);
1013 uint32_t aic79xx_verbose;
1016 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1019 struct Scsi_Host *host;
1024 template->name = ahd->description;
1025 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1029 *((struct ahd_softc **)host->hostdata) = ahd;
1030 ahd->platform_data->host = host;
1031 host->can_queue = AHD_MAX_QUEUE;
1032 host->cmd_per_lun = 2;
1033 host->sg_tablesize = AHD_NSEG;
1034 host->this_id = ahd->our_id;
1035 host->irq = ahd->platform_data->irq;
1036 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1037 host->max_lun = AHD_NUM_LUNS;
1038 host->max_channel = 0;
1039 host->sg_tablesize = AHD_NSEG;
1041 ahd_set_unit(ahd, ahd_linux_unit++);
1042 ahd_unlock(ahd, &s);
1043 sprintf(buf, "scsi%d", host->host_no);
1044 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1045 if (new_name != NULL) {
1046 strcpy(new_name, buf);
1047 ahd_set_name(ahd, new_name);
1049 host->unique_id = ahd->unit;
1050 ahd_linux_initialize_scsi_bus(ahd);
1051 ahd_intr_enable(ahd, TRUE);
1053 host->transportt = ahd_linux_transport_template;
1055 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1057 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1058 scsi_host_put(host);
1062 scsi_scan_host(host);
1067 ahd_linux_get_memsize(void)
1072 return ((uint64_t)si.totalram << PAGE_SHIFT);
1076 * Place the SCSI bus into a known state by either resetting it,
1077 * or forcing transfer negotiations on the next command to any
1081 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1090 if (aic79xx_no_reset != 0)
1091 ahd->flags &= ~AHD_RESET_BUS_A;
1093 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1094 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1096 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1101 * Force negotiation to async for all targets that
1102 * will not see an initial bus reset.
1104 for (; target_id < numtarg; target_id++) {
1105 struct ahd_devinfo devinfo;
1106 struct ahd_initiator_tinfo *tinfo;
1107 struct ahd_tmode_tstate *tstate;
1109 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1110 target_id, &tstate);
1111 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1112 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1113 ahd_update_neg_request(ahd, &devinfo, tstate,
1114 tinfo, AHD_NEG_ALWAYS);
1116 ahd_unlock(ahd, &s);
1117 /* Give the bus some time to recover */
1118 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1119 ahd_freeze_simq(ahd);
1120 msleep(AIC79XX_RESET_DELAY);
1121 ahd_release_simq(ahd);
1126 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1128 ahd->platform_data =
1129 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1130 if (ahd->platform_data == NULL)
1132 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1133 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1135 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1140 ahd_platform_free(struct ahd_softc *ahd)
1142 struct scsi_target *starget;
1145 if (ahd->platform_data != NULL) {
1146 /* destroy all of the device and target objects */
1147 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1148 starget = ahd->platform_data->starget[i];
1149 if (starget != NULL) {
1150 for (j = 0; j < AHD_NUM_LUNS; j++) {
1151 struct ahd_linux_target *targ =
1152 scsi_transport_target_data(starget);
1153 if (targ->sdev[j] == NULL)
1155 targ->sdev[j] = NULL;
1157 ahd->platform_data->starget[i] = NULL;
1161 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1162 free_irq(ahd->platform_data->irq, ahd);
1163 if (ahd->tags[0] == BUS_SPACE_PIO
1164 && ahd->bshs[0].ioport != 0)
1165 release_region(ahd->bshs[0].ioport, 256);
1166 if (ahd->tags[1] == BUS_SPACE_PIO
1167 && ahd->bshs[1].ioport != 0)
1168 release_region(ahd->bshs[1].ioport, 256);
1169 if (ahd->tags[0] == BUS_SPACE_MEMIO
1170 && ahd->bshs[0].maddr != NULL) {
1171 iounmap(ahd->bshs[0].maddr);
1172 release_mem_region(ahd->platform_data->mem_busaddr,
1175 if (ahd->platform_data->host)
1176 scsi_host_put(ahd->platform_data->host);
1178 free(ahd->platform_data, M_DEVBUF);
1183 ahd_platform_init(struct ahd_softc *ahd)
1186 * Lookup and commit any modified IO Cell options.
1188 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1189 struct ahd_linux_iocell_opts *iocell_opts;
1191 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1192 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1193 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1194 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1195 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1196 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1197 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1203 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1205 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1206 SCB_GET_CHANNEL(ahd, scb),
1207 SCB_GET_LUN(scb), SCB_LIST_NULL,
1208 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1212 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1215 struct scsi_target *starget;
1216 struct ahd_linux_target *targ;
1217 struct ahd_linux_device *dev;
1218 struct scsi_device *sdev;
1222 starget = ahd->platform_data->starget[devinfo->target];
1223 targ = scsi_transport_target_data(starget);
1224 BUG_ON(targ == NULL);
1225 sdev = targ->sdev[devinfo->lun];
1229 dev = scsi_transport_device_data(sdev);
1233 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1236 case AHD_QUEUE_NONE:
1239 case AHD_QUEUE_BASIC:
1240 now_queuing = AHD_DEV_Q_BASIC;
1242 case AHD_QUEUE_TAGGED:
1243 now_queuing = AHD_DEV_Q_TAGGED;
1246 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1247 && (was_queuing != now_queuing)
1248 && (dev->active != 0)) {
1249 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1253 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1257 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1260 * Start out agressively and allow our
1261 * dynamic queue depth algorithm to take
1264 dev->maxtags = usertags;
1265 dev->openings = dev->maxtags - dev->active;
1267 if (dev->maxtags == 0) {
1269 * Queueing is disabled by the user.
1272 } else if (alg == AHD_QUEUE_TAGGED) {
1273 dev->flags |= AHD_DEV_Q_TAGGED;
1274 if (aic79xx_periodic_otag != 0)
1275 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1277 dev->flags |= AHD_DEV_Q_BASIC;
1279 /* We can only have one opening. */
1281 dev->openings = 1 - dev->active;
1284 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1285 case AHD_DEV_Q_BASIC:
1286 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1287 scsi_activate_tcq(sdev, dev->openings + dev->active);
1289 case AHD_DEV_Q_TAGGED:
1290 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1291 scsi_activate_tcq(sdev, dev->openings + dev->active);
1295 * We allow the OS to queue 2 untagged transactions to
1296 * us at any time even though we can only execute them
1297 * serially on the controller/device. This should
1298 * remove some latency.
1300 scsi_deactivate_tcq(sdev, 1);
1306 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1307 int lun, u_int tag, role_t role, uint32_t status)
1313 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1315 static int warned_user;
1319 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1320 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
1322 if (warned_user == 0) {
1324 "aic79xx: WARNING: Insufficient tag_info instances\n"
1325 "aic79xx: for installed controllers. Using defaults\n"
1326 "aic79xx: Please update the aic79xx_tag_info array in\n"
1327 "aic79xx: the aic79xx_osm.c source file.\n");
1330 tags = AHD_MAX_QUEUE;
1332 adapter_tag_info_t *tag_info;
1334 tag_info = &aic79xx_tag_info[ahd->unit];
1335 tags = tag_info->tag_commands[devinfo->target_offset];
1336 if (tags > AHD_MAX_QUEUE)
1337 tags = AHD_MAX_QUEUE;
1344 * Determines the queue depth for a given device.
1347 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1349 struct ahd_devinfo devinfo;
1351 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1353 ahd_compile_devinfo(&devinfo,
1355 sdev->sdev_target->id, sdev->lun,
1356 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1358 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1359 if (tags != 0 && sdev->tagged_supported != 0) {
1361 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
1362 ahd_print_devinfo(ahd, &devinfo);
1363 printf("Tagged Queuing enabled. Depth %d\n", tags);
1365 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
1370 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1371 struct scsi_cmnd *cmd)
1374 struct hardware_scb *hscb;
1375 struct ahd_initiator_tinfo *tinfo;
1376 struct ahd_tmode_tstate *tstate;
1379 unsigned long flags;
1381 ahd_lock(ahd, &flags);
1384 * Get an scb to use.
1386 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1387 cmd->device->id, &tstate);
1388 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1389 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1390 col_idx = AHD_NEVER_COL_IDX;
1392 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1395 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1396 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1397 ahd_unlock(ahd, &flags);
1398 return SCSI_MLQUEUE_HOST_BUSY;
1402 scb->platform_data->dev = dev;
1404 cmd->host_scribble = (char *)scb;
1407 * Fill out basics of the HSCB.
1410 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1411 hscb->lun = cmd->device->lun;
1412 scb->hscb->task_management = 0;
1413 mask = SCB_GET_TARGET_MASK(ahd, scb);
1415 if ((ahd->user_discenable & mask) != 0)
1416 hscb->control |= DISCENB;
1418 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1419 scb->flags |= SCB_PACKETIZED;
1421 if ((tstate->auto_negotiate & mask) != 0) {
1422 scb->flags |= SCB_AUTO_NEGOTIATE;
1423 scb->hscb->control |= MK_MESSAGE;
1424 } else if (cmd->cmnd[0] == INQUIRY
1425 && (tinfo->curr.offset != 0
1426 || tinfo->curr.width != MSG_EXT_WDTR_BUS_8_BIT
1427 || tinfo->curr.ppr_options != 0)
1428 && (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ)==0) {
1430 * The SCSI spec requires inquiry
1431 * commands to complete without
1432 * reporting unit attention conditions.
1433 * Because of this, an inquiry command
1434 * that occurs just after a device is
1435 * reset will result in a data phase
1436 * with mismatched negotiated rates.
1437 * The core already forces a renegotiation
1438 * for reset events that are visible to
1439 * our controller or that we initiate,
1440 * but a third party device reset or a
1441 * hot-plug insertion can still cause this
1442 * issue. Therefore, we force a re-negotiation
1443 * for every inquiry command unless we
1446 scb->flags |= SCB_NEGOTIATE;
1447 scb->hscb->control |= MK_MESSAGE;
1450 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1452 uint8_t tag_msgs[2];
1454 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1455 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1456 hscb->control |= tag_msgs[0];
1457 if (tag_msgs[0] == MSG_ORDERED_TASK)
1458 dev->commands_since_idle_or_otag = 0;
1460 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1461 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1462 hscb->control |= MSG_ORDERED_TASK;
1463 dev->commands_since_idle_or_otag = 0;
1465 hscb->control |= MSG_SIMPLE_TASK;
1469 hscb->cdb_len = cmd->cmd_len;
1470 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1472 scb->platform_data->xfer_len = 0;
1473 ahd_set_residual(scb, 0);
1474 ahd_set_sense_residual(scb, 0);
1476 if (cmd->use_sg != 0) {
1478 struct scatterlist *cur_seg;
1482 cur_seg = (struct scatterlist *)cmd->request_buffer;
1483 dir = cmd->sc_data_direction;
1484 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1486 scb->platform_data->xfer_len = 0;
1487 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1491 addr = sg_dma_address(cur_seg);
1492 len = sg_dma_len(cur_seg);
1493 scb->platform_data->xfer_len += len;
1494 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1497 } else if (cmd->request_bufflen != 0) {
1503 dir = cmd->sc_data_direction;
1504 addr = pci_map_single(ahd->dev_softc,
1505 cmd->request_buffer,
1506 cmd->request_bufflen, dir);
1507 scb->platform_data->xfer_len = cmd->request_bufflen;
1508 scb->platform_data->buf_busaddr = addr;
1509 sg = ahd_sg_setup(ahd, scb, sg, addr,
1510 cmd->request_bufflen, /*last*/TRUE);
1513 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1516 dev->commands_issued++;
1518 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1519 dev->commands_since_idle_or_otag++;
1520 scb->flags |= SCB_ACTIVE;
1521 ahd_queue_scb(ahd, scb);
1523 ahd_unlock(ahd, &flags);
1529 * SCSI controller interrupt handler.
1532 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1534 struct ahd_softc *ahd;
1538 ahd = (struct ahd_softc *) dev_id;
1539 ahd_lock(ahd, &flags);
1540 ours = ahd_intr(ahd);
1541 ahd_unlock(ahd, &flags);
1542 return IRQ_RETVAL(ours);
1546 ahd_send_async(struct ahd_softc *ahd, char channel,
1547 u_int target, u_int lun, ac_code code, void *arg)
1550 case AC_TRANSFER_NEG:
1553 struct scsi_target *starget;
1554 struct info_str info;
1555 struct ahd_initiator_tinfo *tinfo;
1556 struct ahd_tmode_tstate *tstate;
1557 unsigned int target_ppr_options;
1559 BUG_ON(target == CAM_TARGET_WILDCARD);
1562 info.length = sizeof(buf);
1565 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1569 * Don't bother reporting results while
1570 * negotiations are still pending.
1572 if (tinfo->curr.period != tinfo->goal.period
1573 || tinfo->curr.width != tinfo->goal.width
1574 || tinfo->curr.offset != tinfo->goal.offset
1575 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1576 if (bootverbose == 0)
1580 * Don't bother reporting results that
1581 * are identical to those last reported.
1583 starget = ahd->platform_data->starget[target];
1584 if (starget == NULL)
1587 target_ppr_options =
1588 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1589 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1590 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1591 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1592 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1593 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1594 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1595 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1597 if (tinfo->curr.period == spi_period(starget)
1598 && tinfo->curr.width == spi_width(starget)
1599 && tinfo->curr.offset == spi_offset(starget)
1600 && tinfo->curr.ppr_options == target_ppr_options)
1601 if (bootverbose == 0)
1604 spi_period(starget) = tinfo->curr.period;
1605 spi_width(starget) = tinfo->curr.width;
1606 spi_offset(starget) = tinfo->curr.offset;
1607 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1608 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1609 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1610 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1611 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1612 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1613 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1614 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1615 spi_display_xfer_agreement(starget);
1620 WARN_ON(lun != CAM_LUN_WILDCARD);
1621 scsi_report_device_reset(ahd->platform_data->host,
1622 channel - 'A', target);
1626 if (ahd->platform_data->host != NULL) {
1627 scsi_report_bus_reset(ahd->platform_data->host,
1632 panic("ahd_send_async: Unexpected async event");
1637 * Calls the higher level scsi done function and frees the scb.
1640 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1642 struct scsi_cmnd *cmd;
1643 struct ahd_linux_device *dev;
1645 if ((scb->flags & SCB_ACTIVE) == 0) {
1646 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1647 ahd_dump_card_state(ahd);
1648 panic("Stopping for safety");
1650 LIST_REMOVE(scb, pending_links);
1652 dev = scb->platform_data->dev;
1655 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1656 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1659 ahd_linux_unmap_scb(ahd, scb);
1662 * Guard against stale sense data.
1663 * The Linux mid-layer assumes that sense
1664 * was retrieved anytime the first byte of
1665 * the sense buffer looks "sane".
1667 cmd->sense_buffer[0] = 0;
1668 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1669 uint32_t amount_xferred;
1672 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1673 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1675 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1676 ahd_print_path(ahd, scb);
1677 printf("Set CAM_UNCOR_PARITY\n");
1680 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1681 #ifdef AHD_REPORT_UNDERFLOWS
1683 * This code is disabled by default as some
1684 * clients of the SCSI system do not properly
1685 * initialize the underflow parameter. This
1686 * results in spurious termination of commands
1687 * that complete as expected (e.g. underflow is
1688 * allowed as command can return variable amounts
1691 } else if (amount_xferred < scb->io_ctx->underflow) {
1694 ahd_print_path(ahd, scb);
1696 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1697 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1699 ahd_print_path(ahd, scb);
1700 printf("Saw underflow (%ld of %ld bytes). "
1701 "Treated as error\n",
1702 ahd_get_residual(scb),
1703 ahd_get_transfer_length(scb));
1704 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1707 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1709 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1710 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1713 if (dev->openings == 1
1714 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1715 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1716 dev->tag_success_count++;
1718 * Some devices deal with temporary internal resource
1719 * shortages by returning queue full. When the queue
1720 * full occurrs, we throttle back. Slowly try to get
1721 * back to our previous queue depth.
1723 if ((dev->openings + dev->active) < dev->maxtags
1724 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1725 dev->tag_success_count = 0;
1729 if (dev->active == 0)
1730 dev->commands_since_idle_or_otag = 0;
1732 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1733 printf("Recovery SCB completes\n");
1734 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1735 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1736 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1738 if (ahd->platform_data->eh_done)
1739 complete(ahd->platform_data->eh_done);
1742 ahd_free_scb(ahd, scb);
1743 ahd_linux_queue_cmd_complete(ahd, cmd);
1747 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1748 struct scsi_device *sdev, struct scb *scb)
1750 struct ahd_devinfo devinfo;
1751 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1753 ahd_compile_devinfo(&devinfo,
1755 sdev->sdev_target->id, sdev->lun,
1756 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1760 * We don't currently trust the mid-layer to
1761 * properly deal with queue full or busy. So,
1762 * when one occurs, we tell the mid-layer to
1763 * unconditionally requeue the command to us
1764 * so that we can retry it ourselves. We also
1765 * implement our own throttling mechanism so
1766 * we don't clobber the device with too many
1769 switch (ahd_get_scsi_status(scb)) {
1772 case SCSI_STATUS_CHECK_COND:
1773 case SCSI_STATUS_CMD_TERMINATED:
1775 struct scsi_cmnd *cmd;
1778 * Copy sense information to the OS's cmd
1779 * structure if it is available.
1782 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1783 struct scsi_status_iu_header *siu;
1787 if (scb->flags & SCB_SENSE) {
1788 sense_size = MIN(sizeof(struct scsi_sense_data)
1789 - ahd_get_sense_residual(scb),
1790 sizeof(cmd->sense_buffer));
1794 * Copy only the sense data into the provided
1797 siu = (struct scsi_status_iu_header *)
1799 sense_size = MIN(scsi_4btoul(siu->sense_length),
1800 sizeof(cmd->sense_buffer));
1801 sense_offset = SIU_SENSE_OFFSET(siu);
1804 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1805 memcpy(cmd->sense_buffer,
1806 ahd_get_sense_buf(ahd, scb)
1807 + sense_offset, sense_size);
1808 cmd->result |= (DRIVER_SENSE << 24);
1811 if (ahd_debug & AHD_SHOW_SENSE) {
1814 printf("Copied %d bytes of sense data at %d:",
1815 sense_size, sense_offset);
1816 for (i = 0; i < sense_size; i++) {
1819 printf("0x%x ", cmd->sense_buffer[i]);
1827 case SCSI_STATUS_QUEUE_FULL:
1829 * By the time the core driver has returned this
1830 * command, all other commands that were queued
1831 * to us but not the device have been returned.
1832 * This ensures that dev->active is equal to
1833 * the number of commands actually queued to
1836 dev->tag_success_count = 0;
1837 if (dev->active != 0) {
1839 * Drop our opening count to the number
1840 * of commands currently outstanding.
1844 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1845 ahd_print_path(ahd, scb);
1846 printf("Dropping tag count to %d\n",
1850 if (dev->active == dev->tags_on_last_queuefull) {
1852 dev->last_queuefull_same_count++;
1854 * If we repeatedly see a queue full
1855 * at the same queue depth, this
1856 * device has a fixed number of tag
1857 * slots. Lock in this tag depth
1858 * so we stop seeing queue fulls from
1861 if (dev->last_queuefull_same_count
1862 == AHD_LOCK_TAGS_COUNT) {
1863 dev->maxtags = dev->active;
1864 ahd_print_path(ahd, scb);
1865 printf("Locking max tag count at %d\n",
1869 dev->tags_on_last_queuefull = dev->active;
1870 dev->last_queuefull_same_count = 0;
1872 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1873 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1874 ahd_platform_set_tags(ahd, &devinfo,
1875 (dev->flags & AHD_DEV_Q_BASIC)
1876 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1880 * Drop down to a single opening, and treat this
1881 * as if the target returned BUSY SCSI status.
1884 ahd_platform_set_tags(ahd, &devinfo,
1885 (dev->flags & AHD_DEV_Q_BASIC)
1886 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1887 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1892 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1895 * Map CAM error codes into Linux Error codes. We
1896 * avoid the conversion so that the DV code has the
1897 * full error information available when making
1898 * state change decisions.
1904 status = ahd_cmd_get_transaction_status(cmd);
1906 case CAM_REQ_INPROG:
1908 case CAM_SCSI_STATUS_ERROR:
1909 new_status = DID_OK;
1911 case CAM_REQ_ABORTED:
1912 new_status = DID_ABORT;
1915 new_status = DID_BUS_BUSY;
1917 case CAM_REQ_INVALID:
1918 case CAM_PATH_INVALID:
1919 new_status = DID_BAD_TARGET;
1921 case CAM_SEL_TIMEOUT:
1922 new_status = DID_NO_CONNECT;
1924 case CAM_SCSI_BUS_RESET:
1926 new_status = DID_RESET;
1928 case CAM_UNCOR_PARITY:
1929 new_status = DID_PARITY;
1931 case CAM_CMD_TIMEOUT:
1932 new_status = DID_TIME_OUT;
1935 case CAM_REQ_CMP_ERR:
1936 case CAM_AUTOSENSE_FAIL:
1938 case CAM_DATA_RUN_ERR:
1939 case CAM_UNEXP_BUSFREE:
1940 case CAM_SEQUENCE_FAIL:
1941 case CAM_CCB_LEN_ERR:
1942 case CAM_PROVIDE_FAIL:
1943 case CAM_REQ_TERMIO:
1944 case CAM_UNREC_HBA_ERROR:
1945 case CAM_REQ_TOO_BIG:
1946 new_status = DID_ERROR;
1948 case CAM_REQUEUE_REQ:
1949 new_status = DID_REQUEUE;
1952 /* We should never get here */
1953 new_status = DID_ERROR;
1957 ahd_cmd_set_transaction_status(cmd, new_status);
1960 cmd->scsi_done(cmd);
1964 ahd_freeze_simq(struct ahd_softc *ahd)
1966 scsi_block_requests(ahd->platform_data->host);
1970 ahd_release_simq(struct ahd_softc *ahd)
1972 scsi_unblock_requests(ahd->platform_data->host);
1976 ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
1978 struct ahd_softc *ahd;
1979 struct ahd_linux_device *dev;
1980 struct scb *pending_scb;
1982 u_int active_scbptr;
1992 ahd_mode_state saved_modes;
1993 unsigned long flags;
1998 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2000 scmd_printk(KERN_INFO, cmd,
2001 "Attempting to queue a%s message:",
2002 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2005 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2006 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2009 ahd_lock(ahd, &flags);
2012 * First determine if we currently own this command.
2013 * Start by searching the device queue. If not found
2014 * there, check the pending_scb list. If not found
2015 * at all, and the system wanted us to just abort the
2016 * command, return success.
2018 dev = scsi_transport_device_data(cmd->device);
2022 * No target device for this command exists,
2023 * so we must not still own the command.
2025 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2031 * See if we can find a matching cmd in the pending list.
2033 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2034 if (pending_scb->io_ctx == cmd)
2038 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2040 /* Any SCB for this device will do for a target reset */
2041 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2042 if (ahd_match_scb(ahd, pending_scb,
2044 scmd_channel(cmd) + 'A',
2046 SCB_LIST_NULL, ROLE_INITIATOR))
2051 if (pending_scb == NULL) {
2052 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2056 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2058 * We can't queue two recovery actions using the same SCB
2065 * Ensure that the card doesn't do anything
2066 * behind our back. Also make sure that we
2067 * didn't "just" miss an interrupt that would
2070 was_paused = ahd_is_paused(ahd);
2071 ahd_pause_and_flushwork(ahd);
2074 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2075 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2079 printf("%s: At time of recovery, card was %spaused\n",
2080 ahd_name(ahd), was_paused ? "" : "not ");
2081 ahd_dump_card_state(ahd);
2083 disconnected = TRUE;
2084 if (flag == SCB_ABORT) {
2085 if (ahd_search_qinfifo(ahd, cmd->device->id,
2086 cmd->device->channel + 'A',
2088 pending_scb->hscb->tag,
2089 ROLE_INITIATOR, CAM_REQ_ABORTED,
2090 SEARCH_COMPLETE) > 0) {
2091 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2092 ahd_name(ahd), cmd->device->channel,
2093 cmd->device->id, cmd->device->lun);
2097 } else if (ahd_search_qinfifo(ahd, cmd->device->id,
2098 cmd->device->channel + 'A',
2099 cmd->device->lun, pending_scb->hscb->tag,
2100 ROLE_INITIATOR, /*status*/0,
2101 SEARCH_COUNT) > 0) {
2102 disconnected = FALSE;
2105 saved_modes = ahd_save_modes(ahd);
2106 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2107 last_phase = ahd_inb(ahd, LASTPHASE);
2108 saved_scbptr = ahd_get_scbptr(ahd);
2109 active_scbptr = saved_scbptr;
2110 if (disconnected && ((last_phase != P_BUSFREE) ||
2111 (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0)) {
2112 struct scb *bus_scb;
2114 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2115 if (bus_scb == pending_scb)
2116 disconnected = FALSE;
2117 else if (flag != SCB_ABORT
2118 && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
2119 && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2120 disconnected = FALSE;
2124 * At this point, pending_scb is the scb associated with the
2125 * passed in command. That command is currently active on the
2126 * bus or is in the disconnected state.
2128 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2129 if (SCB_GET_TAG(pending_scb) == active_scbptr
2130 || (flag == SCB_DEVICE_RESET
2131 && SCSIID_TARGET(ahd, saved_scsiid) == scmd_id(cmd))) {
2134 * We're active on the bus, so assert ATN
2135 * and hope that the target responds.
2137 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2138 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_DEVICE_RESET;
2139 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2140 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2141 scmd_printk(KERN_INFO, cmd, "BDR message in message buffer\n");
2143 } else if (last_phase != P_BUSFREE
2144 && ahd_inb(ahd, SCSIPHASE) == 0) {
2146 * SCB is not identified, there
2147 * is no pending REQ, and the sequencer
2148 * has not seen a busfree. Looks like
2149 * a stuck connection waiting to
2150 * go busfree. Reset the bus.
2152 found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
2153 /*Initiate Reset*/TRUE);
2154 printf("%s: Issued Channel %c Bus Reset. "
2155 "%d SCBs aborted\n", ahd_name(ahd),
2156 cmd->device->channel + 'A', found);
2157 } else if (disconnected) {
2160 * Actually re-queue this SCB in an attempt
2161 * to select the device before it reconnects.
2163 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2164 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2165 pending_scb->hscb->cdb_len = 0;
2166 pending_scb->hscb->task_attribute = 0;
2167 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2169 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2171 * Mark the SCB has having an outstanding
2172 * task management function. Should the command
2173 * complete normally before the task management
2174 * function can be sent, the host will be notified
2175 * to abort our requeued SCB.
2177 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2178 pending_scb->hscb->task_management);
2181 * If non-packetized, set the MK_MESSAGE control
2182 * bit indicating that we desire to send a message.
2183 * We also set the disconnected flag since there is
2184 * no guarantee that our SCB control byte matches
2185 * the version on the card. We don't want the
2186 * sequencer to abort the command thinking an
2187 * unsolicited reselection occurred.
2189 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2192 * The sequencer will never re-reference the
2193 * in-core SCB. To make sure we are notified
2194 * during reslection, set the MK_MESSAGE flag in
2195 * the card's copy of the SCB.
2197 ahd_outb(ahd, SCB_CONTROL,
2198 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2202 * Clear out any entries in the QINFIFO first
2203 * so we are the next SCB for this target
2206 ahd_search_qinfifo(ahd, cmd->device->id,
2207 cmd->device->channel + 'A', cmd->device->lun,
2208 SCB_LIST_NULL, ROLE_INITIATOR,
2209 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2210 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2211 ahd_set_scbptr(ahd, saved_scbptr);
2212 ahd_print_path(ahd, pending_scb);
2213 printf("Device is disconnected, re-queuing SCB\n");
2216 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2223 * Our assumption is that if we don't have the command, no
2224 * recovery action was required, so we return success. Again,
2225 * the semantics of the mid-layer recovery engine are not
2226 * well defined, so this may change in time.
2233 DECLARE_COMPLETION(done);
2235 ahd->platform_data->eh_done = &done;
2236 ahd_unlock(ahd, &flags);
2238 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2239 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2240 ahd_lock(ahd, &flags);
2241 ahd->platform_data->eh_done = NULL;
2242 ahd_unlock(ahd, &flags);
2243 printf("%s: Timer Expired (active %d)\n",
2244 ahd_name(ahd), dev->active);
2247 printf("Recovery code awake\n");
2249 ahd_unlock(ahd, &flags);
2251 if (retval != SUCCESS)
2252 printf("%s: Command abort returning 0x%x\n",
2253 ahd_name(ahd), retval);
2258 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2260 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2261 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2262 struct ahd_devinfo devinfo;
2263 unsigned long flags;
2265 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2266 starget->channel + 'A', ROLE_INITIATOR);
2267 ahd_lock(ahd, &flags);
2268 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2269 ahd_unlock(ahd, &flags);
2272 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2274 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2275 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2276 struct ahd_tmode_tstate *tstate;
2277 struct ahd_initiator_tinfo *tinfo
2278 = ahd_fetch_transinfo(ahd,
2279 starget->channel + 'A',
2280 shost->this_id, starget->id, &tstate);
2281 struct ahd_devinfo devinfo;
2282 unsigned int ppr_options = tinfo->goal.ppr_options;
2284 unsigned long flags;
2285 unsigned long offset = tinfo->goal.offset;
2288 if ((ahd_debug & AHD_SHOW_DV) != 0)
2289 printf("%s: set period to %d\n", ahd_name(ahd), period);
2292 offset = MAX_OFFSET;
2297 ppr_options |= MSG_EXT_PPR_DT_REQ;
2299 ppr_options |= MSG_EXT_PPR_IU_REQ;
2302 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2304 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2305 starget->channel + 'A', ROLE_INITIATOR);
2307 /* all PPR requests apart from QAS require wide transfers */
2308 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2309 if (spi_width(starget) == 0)
2310 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2313 ahd_find_syncrate(ahd, &period, &ppr_options,
2314 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2316 ahd_lock(ahd, &flags);
2317 ahd_set_syncrate(ahd, &devinfo, period, offset,
2318 ppr_options, AHD_TRANS_GOAL, FALSE);
2319 ahd_unlock(ahd, &flags);
2322 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2324 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2325 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2326 struct ahd_tmode_tstate *tstate;
2327 struct ahd_initiator_tinfo *tinfo
2328 = ahd_fetch_transinfo(ahd,
2329 starget->channel + 'A',
2330 shost->this_id, starget->id, &tstate);
2331 struct ahd_devinfo devinfo;
2332 unsigned int ppr_options = 0;
2333 unsigned int period = 0;
2334 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2335 unsigned long flags;
2338 if ((ahd_debug & AHD_SHOW_DV) != 0)
2339 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2342 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2343 starget->channel + 'A', ROLE_INITIATOR);
2345 period = tinfo->goal.period;
2346 ppr_options = tinfo->goal.ppr_options;
2347 ahd_find_syncrate(ahd, &period, &ppr_options,
2348 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2351 ahd_lock(ahd, &flags);
2352 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2353 AHD_TRANS_GOAL, FALSE);
2354 ahd_unlock(ahd, &flags);
2357 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2359 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2360 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2361 struct ahd_tmode_tstate *tstate;
2362 struct ahd_initiator_tinfo *tinfo
2363 = ahd_fetch_transinfo(ahd,
2364 starget->channel + 'A',
2365 shost->this_id, starget->id, &tstate);
2366 struct ahd_devinfo devinfo;
2367 unsigned int ppr_options = tinfo->goal.ppr_options
2368 & ~MSG_EXT_PPR_DT_REQ;
2369 unsigned int period = tinfo->goal.period;
2370 unsigned int width = tinfo->goal.width;
2371 unsigned long flags;
2374 if ((ahd_debug & AHD_SHOW_DV) != 0)
2375 printf("%s: %s DT\n", ahd_name(ahd),
2376 dt ? "enabling" : "disabling");
2379 ppr_options |= MSG_EXT_PPR_DT_REQ;
2381 ahd_linux_set_width(starget, 1);
2384 period = 10; /* If resetting DT, period must be >= 25ns */
2385 /* IU is invalid without DT set */
2386 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2388 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2389 starget->channel + 'A', ROLE_INITIATOR);
2390 ahd_find_syncrate(ahd, &period, &ppr_options,
2391 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2393 ahd_lock(ahd, &flags);
2394 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2395 ppr_options, AHD_TRANS_GOAL, FALSE);
2396 ahd_unlock(ahd, &flags);
2399 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2401 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2402 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2403 struct ahd_tmode_tstate *tstate;
2404 struct ahd_initiator_tinfo *tinfo
2405 = ahd_fetch_transinfo(ahd,
2406 starget->channel + 'A',
2407 shost->this_id, starget->id, &tstate);
2408 struct ahd_devinfo devinfo;
2409 unsigned int ppr_options = tinfo->goal.ppr_options
2410 & ~MSG_EXT_PPR_QAS_REQ;
2411 unsigned int period = tinfo->goal.period;
2413 unsigned long flags;
2416 if ((ahd_debug & AHD_SHOW_DV) != 0)
2417 printf("%s: %s QAS\n", ahd_name(ahd),
2418 qas ? "enabling" : "disabling");
2422 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2425 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2427 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2428 starget->channel + 'A', ROLE_INITIATOR);
2429 ahd_find_syncrate(ahd, &period, &ppr_options,
2430 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2432 ahd_lock(ahd, &flags);
2433 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2434 ppr_options, AHD_TRANS_GOAL, FALSE);
2435 ahd_unlock(ahd, &flags);
2438 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2440 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2441 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2442 struct ahd_tmode_tstate *tstate;
2443 struct ahd_initiator_tinfo *tinfo
2444 = ahd_fetch_transinfo(ahd,
2445 starget->channel + 'A',
2446 shost->this_id, starget->id, &tstate);
2447 struct ahd_devinfo devinfo;
2448 unsigned int ppr_options = tinfo->goal.ppr_options
2449 & ~MSG_EXT_PPR_IU_REQ;
2450 unsigned int period = tinfo->goal.period;
2452 unsigned long flags;
2455 if ((ahd_debug & AHD_SHOW_DV) != 0)
2456 printf("%s: %s IU\n", ahd_name(ahd),
2457 iu ? "enabling" : "disabling");
2461 ppr_options |= MSG_EXT_PPR_IU_REQ;
2462 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2465 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2467 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2468 starget->channel + 'A', ROLE_INITIATOR);
2469 ahd_find_syncrate(ahd, &period, &ppr_options,
2470 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2472 ahd_lock(ahd, &flags);
2473 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2474 ppr_options, AHD_TRANS_GOAL, FALSE);
2475 ahd_unlock(ahd, &flags);
2478 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2480 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2481 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2482 struct ahd_tmode_tstate *tstate;
2483 struct ahd_initiator_tinfo *tinfo
2484 = ahd_fetch_transinfo(ahd,
2485 starget->channel + 'A',
2486 shost->this_id, starget->id, &tstate);
2487 struct ahd_devinfo devinfo;
2488 unsigned int ppr_options = tinfo->goal.ppr_options
2489 & ~MSG_EXT_PPR_RD_STRM;
2490 unsigned int period = tinfo->goal.period;
2491 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2492 unsigned long flags;
2495 if ((ahd_debug & AHD_SHOW_DV) != 0)
2496 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2497 rdstrm ? "enabling" : "disabling");
2501 ppr_options |= MSG_EXT_PPR_RD_STRM;
2503 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2504 starget->channel + 'A', ROLE_INITIATOR);
2505 ahd_find_syncrate(ahd, &period, &ppr_options,
2506 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2508 ahd_lock(ahd, &flags);
2509 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2510 ppr_options, AHD_TRANS_GOAL, FALSE);
2511 ahd_unlock(ahd, &flags);
2514 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2516 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2517 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2518 struct ahd_tmode_tstate *tstate;
2519 struct ahd_initiator_tinfo *tinfo
2520 = ahd_fetch_transinfo(ahd,
2521 starget->channel + 'A',
2522 shost->this_id, starget->id, &tstate);
2523 struct ahd_devinfo devinfo;
2524 unsigned int ppr_options = tinfo->goal.ppr_options
2525 & ~MSG_EXT_PPR_WR_FLOW;
2526 unsigned int period = tinfo->goal.period;
2527 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2528 unsigned long flags;
2531 if ((ahd_debug & AHD_SHOW_DV) != 0)
2532 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2533 wrflow ? "enabling" : "disabling");
2537 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2539 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2540 starget->channel + 'A', ROLE_INITIATOR);
2541 ahd_find_syncrate(ahd, &period, &ppr_options,
2542 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2544 ahd_lock(ahd, &flags);
2545 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2546 ppr_options, AHD_TRANS_GOAL, FALSE);
2547 ahd_unlock(ahd, &flags);
2550 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2552 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2553 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2554 struct ahd_tmode_tstate *tstate;
2555 struct ahd_initiator_tinfo *tinfo
2556 = ahd_fetch_transinfo(ahd,
2557 starget->channel + 'A',
2558 shost->this_id, starget->id, &tstate);
2559 struct ahd_devinfo devinfo;
2560 unsigned int ppr_options = tinfo->goal.ppr_options
2562 unsigned int period = tinfo->goal.period;
2563 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2564 unsigned long flags;
2566 if ((ahd->features & AHD_RTI) == 0) {
2568 if ((ahd_debug & AHD_SHOW_DV) != 0)
2569 printf("%s: RTI not available\n", ahd_name(ahd));
2575 if ((ahd_debug & AHD_SHOW_DV) != 0)
2576 printf("%s: %s RTI\n", ahd_name(ahd),
2577 rti ? "enabling" : "disabling");
2581 ppr_options |= MSG_EXT_PPR_RTI;
2583 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2584 starget->channel + 'A', ROLE_INITIATOR);
2585 ahd_find_syncrate(ahd, &period, &ppr_options,
2586 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2588 ahd_lock(ahd, &flags);
2589 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2590 ppr_options, AHD_TRANS_GOAL, FALSE);
2591 ahd_unlock(ahd, &flags);
2594 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2596 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2597 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2598 struct ahd_tmode_tstate *tstate;
2599 struct ahd_initiator_tinfo *tinfo
2600 = ahd_fetch_transinfo(ahd,
2601 starget->channel + 'A',
2602 shost->this_id, starget->id, &tstate);
2603 struct ahd_devinfo devinfo;
2604 unsigned int ppr_options = tinfo->goal.ppr_options
2605 & ~MSG_EXT_PPR_PCOMP_EN;
2606 unsigned int period = tinfo->goal.period;
2607 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2608 unsigned long flags;
2611 if ((ahd_debug & AHD_SHOW_DV) != 0)
2612 printf("%s: %s Precompensation\n", ahd_name(ahd),
2613 pcomp ? "Enable" : "Disable");
2617 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2619 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2620 starget->channel + 'A', ROLE_INITIATOR);
2621 ahd_find_syncrate(ahd, &period, &ppr_options,
2622 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2624 ahd_lock(ahd, &flags);
2625 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2626 ppr_options, AHD_TRANS_GOAL, FALSE);
2627 ahd_unlock(ahd, &flags);
2630 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2632 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2633 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2634 struct ahd_tmode_tstate *tstate;
2635 struct ahd_initiator_tinfo *tinfo
2636 = ahd_fetch_transinfo(ahd,
2637 starget->channel + 'A',
2638 shost->this_id, starget->id, &tstate);
2639 struct ahd_devinfo devinfo;
2640 unsigned int ppr_options = tinfo->goal.ppr_options
2641 & ~MSG_EXT_PPR_HOLD_MCS;
2642 unsigned int period = tinfo->goal.period;
2643 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2644 unsigned long flags;
2647 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2649 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2650 starget->channel + 'A', ROLE_INITIATOR);
2651 ahd_find_syncrate(ahd, &period, &ppr_options,
2652 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2654 ahd_lock(ahd, &flags);
2655 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2656 ppr_options, AHD_TRANS_GOAL, FALSE);
2657 ahd_unlock(ahd, &flags);
2662 static struct spi_function_template ahd_linux_transport_functions = {
2663 .set_offset = ahd_linux_set_offset,
2665 .set_period = ahd_linux_set_period,
2667 .set_width = ahd_linux_set_width,
2669 .set_dt = ahd_linux_set_dt,
2671 .set_iu = ahd_linux_set_iu,
2673 .set_qas = ahd_linux_set_qas,
2675 .set_rd_strm = ahd_linux_set_rd_strm,
2677 .set_wr_flow = ahd_linux_set_wr_flow,
2679 .set_rti = ahd_linux_set_rti,
2681 .set_pcomp_en = ahd_linux_set_pcomp_en,
2683 .set_hold_mcs = ahd_linux_set_hold_mcs,
2688 ahd_linux_init(void)
2693 * If we've been passed any parameters, process them now.
2696 aic79xx_setup(aic79xx);
2698 ahd_linux_transport_template =
2699 spi_attach_transport(&ahd_linux_transport_functions);
2700 if (!ahd_linux_transport_template)
2703 scsi_transport_reserve_target(ahd_linux_transport_template,
2704 sizeof(struct ahd_linux_target));
2705 scsi_transport_reserve_device(ahd_linux_transport_template,
2706 sizeof(struct ahd_linux_device));
2708 error = ahd_linux_pci_init();
2710 spi_release_transport(ahd_linux_transport_template);
2715 ahd_linux_exit(void)
2717 ahd_linux_pci_exit();
2718 spi_release_transport(ahd_linux_transport_template);
2721 module_init(ahd_linux_init);
2722 module_exit(ahd_linux_exit);