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;
318 * Module information and settable options.
320 static char *aic79xx = NULL;
322 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
323 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
324 MODULE_LICENSE("Dual BSD/GPL");
325 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
326 module_param(aic79xx, charp, 0444);
327 MODULE_PARM_DESC(aic79xx,
328 "period delimited, options string.\n"
329 " verbose Enable verbose/diagnostic logging\n"
330 " allow_memio Allow device registers to be memory mapped\n"
331 " debug Bitmask of debug values to enable\n"
332 " no_reset Supress initial bus resets\n"
333 " extended Enable extended geometry on all controllers\n"
334 " periodic_otag Send an ordered tagged transaction\n"
335 " periodically to prevent tag starvation.\n"
336 " This may be required by some older disk\n"
337 " or drives/RAID arrays.\n"
338 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
339 " tag_info:<tag_str> Set per-target tag depth\n"
340 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
341 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
342 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
343 " amplitude:<int> Set the signal amplitude (0-7).\n"
344 " seltime:<int> Selection Timeout:\n"
345 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
347 " Sample /etc/modprobe.conf line:\n"
348 " Enable verbose logging\n"
349 " Set tag depth on Controller 2/Target 2 to 10 tags\n"
350 " Shorten the selection timeout to 128ms\n"
352 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
355 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
356 struct scsi_device *,
358 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
359 struct scsi_cmnd *cmd);
360 static void ahd_linux_sem_timeout(u_long arg);
361 static int ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
362 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
363 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
364 struct ahd_devinfo *devinfo);
365 static void ahd_linux_device_queue_depth(struct scsi_device *);
366 static int ahd_linux_run_command(struct ahd_softc*,
367 struct ahd_linux_device *,
369 static void ahd_linux_setup_tag_info_global(char *p);
370 static int aic79xx_setup(char *c);
372 static int ahd_linux_unit;
375 /****************************** Inlines ***************************************/
376 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
379 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
381 struct scsi_cmnd *cmd;
385 direction = cmd->sc_data_direction;
386 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
387 if (cmd->use_sg != 0) {
388 struct scatterlist *sg;
390 sg = (struct scatterlist *)cmd->request_buffer;
391 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
392 } else if (cmd->request_bufflen != 0) {
393 pci_unmap_single(ahd->dev_softc,
394 scb->platform_data->buf_busaddr,
395 cmd->request_bufflen, direction);
399 /******************************** Macros **************************************/
400 #define BUILD_SCSIID(ahd, cmd) \
401 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
404 * Return a string describing the driver.
407 ahd_linux_info(struct Scsi_Host *host)
409 static char buffer[512];
412 struct ahd_softc *ahd;
415 ahd = *(struct ahd_softc **)host->hostdata;
416 memset(bp, 0, sizeof(buffer));
417 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
418 strcat(bp, AIC79XX_DRIVER_VERSION);
421 strcat(bp, ahd->description);
424 ahd_controller_info(ahd, ahd_info);
425 strcat(bp, ahd_info);
432 * Queue an SCB to the controller.
435 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
437 struct ahd_softc *ahd;
438 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
439 int rtn = SCSI_MLQUEUE_HOST_BUSY;
442 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
444 ahd_lock(ahd, &flags);
445 if (ahd->platform_data->qfrozen == 0) {
446 cmd->scsi_done = scsi_done;
447 cmd->result = CAM_REQ_INPROG << 16;
448 rtn = ahd_linux_run_command(ahd, dev, cmd);
451 ahd_unlock(ahd, &flags);
455 static inline struct scsi_target **
456 ahd_linux_target_in_softc(struct scsi_target *starget)
458 struct ahd_softc *ahd =
459 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
460 unsigned int target_offset;
462 target_offset = starget->id;
463 if (starget->channel != 0)
466 return &ahd->platform_data->starget[target_offset];
470 ahd_linux_target_alloc(struct scsi_target *starget)
472 struct ahd_softc *ahd =
473 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
475 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
476 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
477 struct ahd_devinfo devinfo;
478 struct ahd_initiator_tinfo *tinfo;
479 struct ahd_tmode_tstate *tstate;
480 char channel = starget->channel + 'A';
482 ahd_lock(ahd, &flags);
484 BUG_ON(*ahd_targp != NULL);
486 *ahd_targp = starget;
487 memset(targ, 0, sizeof(*targ));
489 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
490 starget->id, &tstate);
491 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
492 CAM_LUN_WILDCARD, channel,
494 spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
495 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
496 spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
498 spi_max_offset(starget) = MAX_OFFSET_PACED;
499 spi_max_width(starget) = ahd->features & AHD_WIDE;
501 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
502 AHD_TRANS_GOAL, /*paused*/FALSE);
503 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
504 AHD_TRANS_GOAL, /*paused*/FALSE);
505 ahd_unlock(ahd, &flags);
511 ahd_linux_target_destroy(struct scsi_target *starget)
513 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
519 ahd_linux_slave_alloc(struct scsi_device *sdev)
521 struct ahd_softc *ahd =
522 *((struct ahd_softc **)sdev->host->hostdata);
523 struct scsi_target *starget = sdev->sdev_target;
524 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
525 struct ahd_linux_device *dev;
528 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
530 BUG_ON(targ->sdev[sdev->lun] != NULL);
532 dev = scsi_transport_device_data(sdev);
533 memset(dev, 0, sizeof(*dev));
536 * We start out life using untagged
537 * transactions of which we allow one.
542 * Set maxtags to 0. This will be changed if we
543 * later determine that we are dealing with
544 * a tagged queuing capable device.
548 targ->sdev[sdev->lun] = sdev;
554 ahd_linux_slave_configure(struct scsi_device *sdev)
556 struct ahd_softc *ahd;
558 ahd = *((struct ahd_softc **)sdev->host->hostdata);
560 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
562 ahd_linux_device_queue_depth(sdev);
564 /* Initial Domain Validation */
565 if (!spi_initial_dv(sdev->sdev_target))
572 ahd_linux_slave_destroy(struct scsi_device *sdev)
574 struct ahd_softc *ahd;
575 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
576 struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
578 ahd = *((struct ahd_softc **)sdev->host->hostdata);
580 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
584 targ->sdev[sdev->lun] = NULL;
588 #if defined(__i386__)
590 * Return the disk geometry for the given SCSI device.
593 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
594 sector_t capacity, int geom[])
602 struct ahd_softc *ahd;
604 ahd = *((struct ahd_softc **)sdev->host->hostdata);
606 bh = scsi_bios_ptable(bdev);
608 ret = scsi_partsize(bh, capacity,
609 &geom[2], &geom[0], &geom[1]);
616 cylinders = aic_sector_div(capacity, heads, sectors);
618 if (aic79xx_extended != 0)
621 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
622 if (extended && cylinders >= 1024) {
625 cylinders = aic_sector_div(capacity, heads, sectors);
635 * Abort the current SCSI command(s).
638 ahd_linux_abort(struct scsi_cmnd *cmd)
642 error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT);
644 printf("aic79xx_abort returns 0x%x\n", error);
649 * Attempt to send a target reset message to the device that timed out.
652 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
656 error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
658 printf("aic79xx_dev_reset returns 0x%x\n", error);
663 * Reset the SCSI bus.
666 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
668 struct ahd_softc *ahd;
672 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
674 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
675 printf("%s: Bus reset called for cmd %p\n",
679 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
680 /*initiate reset*/TRUE);
684 printf("%s: SCSI bus reset delivered. "
685 "%d SCBs aborted.\n", ahd_name(ahd), found);
690 struct scsi_host_template aic79xx_driver_template = {
691 .module = THIS_MODULE,
693 .proc_name = "aic79xx",
694 .proc_info = ahd_linux_proc_info,
695 .info = ahd_linux_info,
696 .queuecommand = ahd_linux_queue,
697 .eh_abort_handler = ahd_linux_abort,
698 .eh_device_reset_handler = ahd_linux_dev_reset,
699 .eh_bus_reset_handler = ahd_linux_bus_reset,
700 #if defined(__i386__)
701 .bios_param = ahd_linux_biosparam,
703 .can_queue = AHD_MAX_QUEUE,
706 .use_clustering = ENABLE_CLUSTERING,
707 .slave_alloc = ahd_linux_slave_alloc,
708 .slave_configure = ahd_linux_slave_configure,
709 .slave_destroy = ahd_linux_slave_destroy,
710 .target_alloc = ahd_linux_target_alloc,
711 .target_destroy = ahd_linux_target_destroy,
714 /******************************** Bus DMA *************************************/
716 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
717 bus_size_t alignment, bus_size_t boundary,
718 dma_addr_t lowaddr, dma_addr_t highaddr,
719 bus_dma_filter_t *filter, void *filterarg,
720 bus_size_t maxsize, int nsegments,
721 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
725 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
730 * Linux is very simplistic about DMA memory. For now don't
731 * maintain all specification information. Once Linux supplies
732 * better facilities for doing these operations, or the
733 * needs of this particular driver change, we might need to do
736 dmat->alignment = alignment;
737 dmat->boundary = boundary;
738 dmat->maxsize = maxsize;
744 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
746 free(dmat, M_DEVBUF);
750 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
751 int flags, bus_dmamap_t *mapp)
753 *vaddr = pci_alloc_consistent(ahd->dev_softc,
754 dmat->maxsize, mapp);
761 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
762 void* vaddr, bus_dmamap_t map)
764 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
769 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
770 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
771 void *cb_arg, int flags)
774 * Assume for now that this will only be used during
775 * initialization and not for per-transaction buffer mapping.
777 bus_dma_segment_t stack_sg;
779 stack_sg.ds_addr = map;
780 stack_sg.ds_len = dmat->maxsize;
781 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
786 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
791 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
797 /********************* Platform Dependent Functions ***************************/
799 * Compare "left hand" softc with "right hand" softc, returning:
800 * < 0 - lahd has a lower priority than rahd
801 * 0 - Softcs are equal
802 * > 0 - lahd has a higher priority than rahd
805 ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd)
810 * Under Linux, cards are ordered as follows:
811 * 1) PCI devices that are marked as the boot controller.
812 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
813 * 3) All remaining PCI devices sorted by bus/slot/func.
816 value = (lahd->flags & AHD_BOOT_CHANNEL)
817 - (rahd->flags & AHD_BOOT_CHANNEL);
819 /* Controllers set for boot have a *higher* priority */
823 value = (lahd->flags & AHD_BIOS_ENABLED)
824 - (rahd->flags & AHD_BIOS_ENABLED);
826 /* Controllers with BIOS enabled have a *higher* priority */
829 /* Still equal. Sort by bus/slot/func. */
830 if (aic79xx_reverse_scan != 0)
831 value = ahd_get_pci_bus(lahd->dev_softc)
832 - ahd_get_pci_bus(rahd->dev_softc);
834 value = ahd_get_pci_bus(rahd->dev_softc)
835 - ahd_get_pci_bus(lahd->dev_softc);
838 if (aic79xx_reverse_scan != 0)
839 value = ahd_get_pci_slot(lahd->dev_softc)
840 - ahd_get_pci_slot(rahd->dev_softc);
842 value = ahd_get_pci_slot(rahd->dev_softc)
843 - ahd_get_pci_slot(lahd->dev_softc);
847 value = rahd->channel - lahd->channel;
852 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
856 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
857 uint8_t *iocell_info;
859 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
860 iocell_info[index] = value & 0xFFFF;
862 printf("iocell[%d:%ld] = %d\n", instance, index, value);
867 ahd_linux_setup_tag_info_global(char *p)
871 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
872 printf("Setting Global Tags= %d\n", tags);
874 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
875 for (j = 0; j < AHD_NUM_TARGETS; j++) {
876 aic79xx_tag_info[i].tag_commands[j] = tags;
882 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
885 if ((instance >= 0) && (targ >= 0)
886 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
887 && (targ < AHD_NUM_TARGETS)) {
888 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
890 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
895 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
896 void (*callback)(u_long, int, int, int32_t),
905 char tok_list[] = {'.', ',', '{', '}', '\0'};
907 /* All options use a ':' name/arg separator */
915 * Restore separator that may be in
916 * the middle of our option argument.
918 tok_end = strchr(opt_arg, '\0');
924 if (instance == -1) {
931 printf("Malformed Option %s\n",
941 else if (instance != -1)
951 else if (instance >= 0)
960 for (i = 0; tok_list[i]; i++) {
961 tok_end2 = strchr(opt_arg, tok_list[i]);
962 if ((tok_end2) && (tok_end2 < tok_end))
965 callback(callback_arg, instance, targ,
966 simple_strtol(opt_arg, NULL, 0));
975 * Handle Linux boot parameters. This routine allows for assigning a value
976 * to a parameter with a ':' between the parameter and the value.
977 * ie. aic79xx=stpwlev:1,extended
980 aic79xx_setup(char *s)
990 { "extended", &aic79xx_extended },
991 { "no_reset", &aic79xx_no_reset },
992 { "verbose", &aic79xx_verbose },
993 { "allow_memio", &aic79xx_allow_memio},
995 { "debug", &ahd_debug },
997 { "reverse_scan", &aic79xx_reverse_scan },
998 { "periodic_otag", &aic79xx_periodic_otag },
999 { "pci_parity", &aic79xx_pci_parity },
1000 { "seltime", &aic79xx_seltime },
1001 { "tag_info", NULL },
1002 { "global_tag_depth", NULL},
1003 { "slewrate", NULL },
1004 { "precomp", NULL },
1005 { "amplitude", NULL },
1008 end = strchr(s, '\0');
1011 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1012 * will never be 0 in this case.
1016 while ((p = strsep(&s, ",.")) != NULL) {
1019 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1021 n = strlen(options[i].name);
1022 if (strncmp(options[i].name, p, n) == 0)
1025 if (i == NUM_ELEMENTS(options))
1028 if (strncmp(p, "global_tag_depth", n) == 0) {
1029 ahd_linux_setup_tag_info_global(p + n);
1030 } else if (strncmp(p, "tag_info", n) == 0) {
1031 s = ahd_parse_brace_option("tag_info", p + n, end,
1032 2, ahd_linux_setup_tag_info, 0);
1033 } else if (strncmp(p, "slewrate", n) == 0) {
1034 s = ahd_parse_brace_option("slewrate",
1035 p + n, end, 1, ahd_linux_setup_iocell_info,
1036 AIC79XX_SLEWRATE_INDEX);
1037 } else if (strncmp(p, "precomp", n) == 0) {
1038 s = ahd_parse_brace_option("precomp",
1039 p + n, end, 1, ahd_linux_setup_iocell_info,
1040 AIC79XX_PRECOMP_INDEX);
1041 } else if (strncmp(p, "amplitude", n) == 0) {
1042 s = ahd_parse_brace_option("amplitude",
1043 p + n, end, 1, ahd_linux_setup_iocell_info,
1044 AIC79XX_AMPLITUDE_INDEX);
1045 } else if (p[n] == ':') {
1046 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1047 } else if (!strncmp(p, "verbose", n)) {
1048 *(options[i].flag) = 1;
1050 *(options[i].flag) ^= 0xFFFFFFFF;
1056 __setup("aic79xx=", aic79xx_setup);
1058 uint32_t aic79xx_verbose;
1061 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1064 struct Scsi_Host *host;
1069 template->name = ahd->description;
1070 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1074 *((struct ahd_softc **)host->hostdata) = ahd;
1076 ahd->platform_data->host = host;
1077 host->can_queue = AHD_MAX_QUEUE;
1078 host->cmd_per_lun = 2;
1079 host->sg_tablesize = AHD_NSEG;
1080 host->this_id = ahd->our_id;
1081 host->irq = ahd->platform_data->irq;
1082 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1083 host->max_lun = AHD_NUM_LUNS;
1084 host->max_channel = 0;
1085 host->sg_tablesize = AHD_NSEG;
1086 ahd_set_unit(ahd, ahd_linux_unit++);
1087 sprintf(buf, "scsi%d", host->host_no);
1088 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1089 if (new_name != NULL) {
1090 strcpy(new_name, buf);
1091 ahd_set_name(ahd, new_name);
1093 host->unique_id = ahd->unit;
1094 ahd_linux_initialize_scsi_bus(ahd);
1095 ahd_intr_enable(ahd, TRUE);
1096 ahd_unlock(ahd, &s);
1098 host->transportt = ahd_linux_transport_template;
1100 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1102 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1103 scsi_host_put(host);
1107 scsi_scan_host(host);
1112 ahd_linux_get_memsize(void)
1117 return ((uint64_t)si.totalram << PAGE_SHIFT);
1121 * Place the SCSI bus into a known state by either resetting it,
1122 * or forcing transfer negotiations on the next command to any
1126 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1134 if (aic79xx_no_reset != 0)
1135 ahd->flags &= ~AHD_RESET_BUS_A;
1137 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1138 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1140 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1143 * Force negotiation to async for all targets that
1144 * will not see an initial bus reset.
1146 for (; target_id < numtarg; target_id++) {
1147 struct ahd_devinfo devinfo;
1148 struct ahd_initiator_tinfo *tinfo;
1149 struct ahd_tmode_tstate *tstate;
1151 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1152 target_id, &tstate);
1153 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1154 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1155 ahd_update_neg_request(ahd, &devinfo, tstate,
1156 tinfo, AHD_NEG_ALWAYS);
1158 /* Give the bus some time to recover */
1159 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1160 ahd_freeze_simq(ahd);
1161 init_timer(&ahd->platform_data->reset_timer);
1162 ahd->platform_data->reset_timer.data = (u_long)ahd;
1163 ahd->platform_data->reset_timer.expires =
1164 jiffies + (AIC79XX_RESET_DELAY * HZ)/1000;
1165 ahd->platform_data->reset_timer.function =
1166 (ahd_linux_callback_t *)ahd_release_simq;
1167 add_timer(&ahd->platform_data->reset_timer);
1172 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1174 ahd->platform_data =
1175 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1176 if (ahd->platform_data == NULL)
1178 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1179 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1181 init_MUTEX_LOCKED(&ahd->platform_data->eh_sem);
1182 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1187 ahd_platform_free(struct ahd_softc *ahd)
1189 struct scsi_target *starget;
1192 if (ahd->platform_data != NULL) {
1193 /* destroy all of the device and target objects */
1194 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1195 starget = ahd->platform_data->starget[i];
1196 if (starget != NULL) {
1197 for (j = 0; j < AHD_NUM_LUNS; j++) {
1198 struct ahd_linux_target *targ =
1199 scsi_transport_target_data(starget);
1200 if (targ->sdev[j] == NULL)
1202 targ->sdev[j] = NULL;
1204 ahd->platform_data->starget[i] = NULL;
1208 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1209 free_irq(ahd->platform_data->irq, ahd);
1210 if (ahd->tags[0] == BUS_SPACE_PIO
1211 && ahd->bshs[0].ioport != 0)
1212 release_region(ahd->bshs[0].ioport, 256);
1213 if (ahd->tags[1] == BUS_SPACE_PIO
1214 && ahd->bshs[1].ioport != 0)
1215 release_region(ahd->bshs[1].ioport, 256);
1216 if (ahd->tags[0] == BUS_SPACE_MEMIO
1217 && ahd->bshs[0].maddr != NULL) {
1218 iounmap(ahd->bshs[0].maddr);
1219 release_mem_region(ahd->platform_data->mem_busaddr,
1222 if (ahd->platform_data->host)
1223 scsi_host_put(ahd->platform_data->host);
1225 free(ahd->platform_data, M_DEVBUF);
1230 ahd_platform_init(struct ahd_softc *ahd)
1233 * Lookup and commit any modified IO Cell options.
1235 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1236 struct ahd_linux_iocell_opts *iocell_opts;
1238 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1239 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1240 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1241 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1242 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1243 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1244 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1250 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1252 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1253 SCB_GET_CHANNEL(ahd, scb),
1254 SCB_GET_LUN(scb), SCB_LIST_NULL,
1255 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1259 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1262 struct scsi_target *starget;
1263 struct ahd_linux_target *targ;
1264 struct ahd_linux_device *dev;
1265 struct scsi_device *sdev;
1269 starget = ahd->platform_data->starget[devinfo->target];
1270 targ = scsi_transport_target_data(starget);
1271 BUG_ON(targ == NULL);
1272 sdev = targ->sdev[devinfo->lun];
1276 dev = scsi_transport_device_data(sdev);
1280 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1283 case AHD_QUEUE_NONE:
1286 case AHD_QUEUE_BASIC:
1287 now_queuing = AHD_DEV_Q_BASIC;
1289 case AHD_QUEUE_TAGGED:
1290 now_queuing = AHD_DEV_Q_TAGGED;
1293 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1294 && (was_queuing != now_queuing)
1295 && (dev->active != 0)) {
1296 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1300 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1304 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1307 * Start out agressively and allow our
1308 * dynamic queue depth algorithm to take
1311 dev->maxtags = usertags;
1312 dev->openings = dev->maxtags - dev->active;
1314 if (dev->maxtags == 0) {
1316 * Queueing is disabled by the user.
1319 } else if (alg == AHD_QUEUE_TAGGED) {
1320 dev->flags |= AHD_DEV_Q_TAGGED;
1321 if (aic79xx_periodic_otag != 0)
1322 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1324 dev->flags |= AHD_DEV_Q_BASIC;
1326 /* We can only have one opening. */
1328 dev->openings = 1 - dev->active;
1331 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1332 case AHD_DEV_Q_BASIC:
1333 scsi_adjust_queue_depth(sdev,
1335 dev->openings + dev->active);
1337 case AHD_DEV_Q_TAGGED:
1338 scsi_adjust_queue_depth(sdev,
1340 dev->openings + dev->active);
1344 * We allow the OS to queue 2 untagged transactions to
1345 * us at any time even though we can only execute them
1346 * serially on the controller/device. This should
1347 * remove some latency.
1349 scsi_adjust_queue_depth(sdev,
1357 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1358 int lun, u_int tag, role_t role, uint32_t status)
1364 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1366 static int warned_user;
1370 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1371 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
1373 if (warned_user == 0) {
1375 "aic79xx: WARNING: Insufficient tag_info instances\n"
1376 "aic79xx: for installed controllers. Using defaults\n"
1377 "aic79xx: Please update the aic79xx_tag_info array in\n"
1378 "aic79xx: the aic79xx_osm.c source file.\n");
1381 tags = AHD_MAX_QUEUE;
1383 adapter_tag_info_t *tag_info;
1385 tag_info = &aic79xx_tag_info[ahd->unit];
1386 tags = tag_info->tag_commands[devinfo->target_offset];
1387 if (tags > AHD_MAX_QUEUE)
1388 tags = AHD_MAX_QUEUE;
1395 * Determines the queue depth for a given device.
1398 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1400 struct ahd_devinfo devinfo;
1402 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1404 ahd_compile_devinfo(&devinfo,
1406 sdev->sdev_target->id, sdev->lun,
1407 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1409 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1410 if (tags != 0 && sdev->tagged_supported != 0) {
1412 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
1413 ahd_print_devinfo(ahd, &devinfo);
1414 printf("Tagged Queuing enabled. Depth %d\n", tags);
1416 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
1421 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1422 struct scsi_cmnd *cmd)
1425 struct hardware_scb *hscb;
1426 struct ahd_initiator_tinfo *tinfo;
1427 struct ahd_tmode_tstate *tstate;
1432 * Get an scb to use.
1434 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1435 cmd->device->id, &tstate);
1436 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1437 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1438 col_idx = AHD_NEVER_COL_IDX;
1440 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1443 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1444 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1445 return SCSI_MLQUEUE_HOST_BUSY;
1449 scb->platform_data->dev = dev;
1451 cmd->host_scribble = (char *)scb;
1454 * Fill out basics of the HSCB.
1457 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1458 hscb->lun = cmd->device->lun;
1459 scb->hscb->task_management = 0;
1460 mask = SCB_GET_TARGET_MASK(ahd, scb);
1462 if ((ahd->user_discenable & mask) != 0)
1463 hscb->control |= DISCENB;
1465 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1466 scb->flags |= SCB_PACKETIZED;
1468 if ((tstate->auto_negotiate & mask) != 0) {
1469 scb->flags |= SCB_AUTO_NEGOTIATE;
1470 scb->hscb->control |= MK_MESSAGE;
1471 } else if (cmd->cmnd[0] == INQUIRY
1472 && (tinfo->curr.offset != 0
1473 || tinfo->curr.width != MSG_EXT_WDTR_BUS_8_BIT
1474 || tinfo->curr.ppr_options != 0)
1475 && (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ)==0) {
1477 * The SCSI spec requires inquiry
1478 * commands to complete without
1479 * reporting unit attention conditions.
1480 * Because of this, an inquiry command
1481 * that occurs just after a device is
1482 * reset will result in a data phase
1483 * with mismatched negotiated rates.
1484 * The core already forces a renegotiation
1485 * for reset events that are visible to
1486 * our controller or that we initiate,
1487 * but a third party device reset or a
1488 * hot-plug insertion can still cause this
1489 * issue. Therefore, we force a re-negotiation
1490 * for every inquiry command unless we
1493 scb->flags |= SCB_NEGOTIATE;
1494 scb->hscb->control |= MK_MESSAGE;
1497 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1499 uint8_t tag_msgs[2];
1501 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1502 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1503 hscb->control |= tag_msgs[0];
1504 if (tag_msgs[0] == MSG_ORDERED_TASK)
1505 dev->commands_since_idle_or_otag = 0;
1507 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1508 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1509 hscb->control |= MSG_ORDERED_TASK;
1510 dev->commands_since_idle_or_otag = 0;
1512 hscb->control |= MSG_SIMPLE_TASK;
1516 hscb->cdb_len = cmd->cmd_len;
1517 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1519 scb->platform_data->xfer_len = 0;
1520 ahd_set_residual(scb, 0);
1521 ahd_set_sense_residual(scb, 0);
1523 if (cmd->use_sg != 0) {
1525 struct scatterlist *cur_seg;
1529 cur_seg = (struct scatterlist *)cmd->request_buffer;
1530 dir = cmd->sc_data_direction;
1531 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1533 scb->platform_data->xfer_len = 0;
1534 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1538 addr = sg_dma_address(cur_seg);
1539 len = sg_dma_len(cur_seg);
1540 scb->platform_data->xfer_len += len;
1541 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1544 } else if (cmd->request_bufflen != 0) {
1550 dir = cmd->sc_data_direction;
1551 addr = pci_map_single(ahd->dev_softc,
1552 cmd->request_buffer,
1553 cmd->request_bufflen, dir);
1554 scb->platform_data->xfer_len = cmd->request_bufflen;
1555 scb->platform_data->buf_busaddr = addr;
1556 sg = ahd_sg_setup(ahd, scb, sg, addr,
1557 cmd->request_bufflen, /*last*/TRUE);
1560 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1563 dev->commands_issued++;
1565 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1566 dev->commands_since_idle_or_otag++;
1567 scb->flags |= SCB_ACTIVE;
1568 ahd_queue_scb(ahd, scb);
1574 * SCSI controller interrupt handler.
1577 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1579 struct ahd_softc *ahd;
1583 ahd = (struct ahd_softc *) dev_id;
1584 ahd_lock(ahd, &flags);
1585 ours = ahd_intr(ahd);
1586 ahd_unlock(ahd, &flags);
1587 return IRQ_RETVAL(ours);
1591 ahd_platform_flushwork(struct ahd_softc *ahd)
1597 ahd_send_async(struct ahd_softc *ahd, char channel,
1598 u_int target, u_int lun, ac_code code, void *arg)
1601 case AC_TRANSFER_NEG:
1604 struct scsi_target *starget;
1605 struct ahd_linux_target *targ;
1606 struct info_str info;
1607 struct ahd_initiator_tinfo *tinfo;
1608 struct ahd_tmode_tstate *tstate;
1609 unsigned int target_ppr_options;
1611 BUG_ON(target == CAM_TARGET_WILDCARD);
1614 info.length = sizeof(buf);
1617 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1621 * Don't bother reporting results while
1622 * negotiations are still pending.
1624 if (tinfo->curr.period != tinfo->goal.period
1625 || tinfo->curr.width != tinfo->goal.width
1626 || tinfo->curr.offset != tinfo->goal.offset
1627 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1628 if (bootverbose == 0)
1632 * Don't bother reporting results that
1633 * are identical to those last reported.
1635 starget = ahd->platform_data->starget[target];
1636 if (starget == NULL)
1638 targ = scsi_transport_target_data(starget);
1640 target_ppr_options =
1641 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1642 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1643 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1644 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1645 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1646 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1647 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1648 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1650 if (tinfo->curr.period == spi_period(starget)
1651 && tinfo->curr.width == spi_width(starget)
1652 && tinfo->curr.offset == spi_offset(starget)
1653 && tinfo->curr.ppr_options == target_ppr_options)
1654 if (bootverbose == 0)
1657 spi_period(starget) = tinfo->curr.period;
1658 spi_width(starget) = tinfo->curr.width;
1659 spi_offset(starget) = tinfo->curr.offset;
1660 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1661 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1662 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1663 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1664 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1665 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1666 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1667 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1668 spi_display_xfer_agreement(starget);
1673 WARN_ON(lun != CAM_LUN_WILDCARD);
1674 scsi_report_device_reset(ahd->platform_data->host,
1675 channel - 'A', target);
1679 if (ahd->platform_data->host != NULL) {
1680 scsi_report_bus_reset(ahd->platform_data->host,
1685 panic("ahd_send_async: Unexpected async event");
1690 * Calls the higher level scsi done function and frees the scb.
1693 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1695 struct scsi_cmnd *cmd;
1696 struct ahd_linux_device *dev;
1698 if ((scb->flags & SCB_ACTIVE) == 0) {
1699 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1700 ahd_dump_card_state(ahd);
1701 panic("Stopping for safety");
1703 LIST_REMOVE(scb, pending_links);
1705 dev = scb->platform_data->dev;
1708 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1709 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1712 ahd_linux_unmap_scb(ahd, scb);
1715 * Guard against stale sense data.
1716 * The Linux mid-layer assumes that sense
1717 * was retrieved anytime the first byte of
1718 * the sense buffer looks "sane".
1720 cmd->sense_buffer[0] = 0;
1721 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1722 uint32_t amount_xferred;
1725 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1726 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1728 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1729 ahd_print_path(ahd, scb);
1730 printf("Set CAM_UNCOR_PARITY\n");
1733 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1734 #ifdef AHD_REPORT_UNDERFLOWS
1736 * This code is disabled by default as some
1737 * clients of the SCSI system do not properly
1738 * initialize the underflow parameter. This
1739 * results in spurious termination of commands
1740 * that complete as expected (e.g. underflow is
1741 * allowed as command can return variable amounts
1744 } else if (amount_xferred < scb->io_ctx->underflow) {
1747 ahd_print_path(ahd, scb);
1749 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1750 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1752 ahd_print_path(ahd, scb);
1753 printf("Saw underflow (%ld of %ld bytes). "
1754 "Treated as error\n",
1755 ahd_get_residual(scb),
1756 ahd_get_transfer_length(scb));
1757 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1760 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1762 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1763 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1766 if (dev->openings == 1
1767 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1768 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1769 dev->tag_success_count++;
1771 * Some devices deal with temporary internal resource
1772 * shortages by returning queue full. When the queue
1773 * full occurrs, we throttle back. Slowly try to get
1774 * back to our previous queue depth.
1776 if ((dev->openings + dev->active) < dev->maxtags
1777 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1778 dev->tag_success_count = 0;
1782 if (dev->active == 0)
1783 dev->commands_since_idle_or_otag = 0;
1785 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1786 printf("Recovery SCB completes\n");
1787 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1788 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1789 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1790 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
1791 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
1792 up(&ahd->platform_data->eh_sem);
1796 ahd_free_scb(ahd, scb);
1797 ahd_linux_queue_cmd_complete(ahd, cmd);
1801 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1802 struct scsi_device *sdev, struct scb *scb)
1804 struct ahd_devinfo devinfo;
1805 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1807 ahd_compile_devinfo(&devinfo,
1809 sdev->sdev_target->id, sdev->lun,
1810 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1814 * We don't currently trust the mid-layer to
1815 * properly deal with queue full or busy. So,
1816 * when one occurs, we tell the mid-layer to
1817 * unconditionally requeue the command to us
1818 * so that we can retry it ourselves. We also
1819 * implement our own throttling mechanism so
1820 * we don't clobber the device with too many
1823 switch (ahd_get_scsi_status(scb)) {
1826 case SCSI_STATUS_CHECK_COND:
1827 case SCSI_STATUS_CMD_TERMINATED:
1829 struct scsi_cmnd *cmd;
1832 * Copy sense information to the OS's cmd
1833 * structure if it is available.
1836 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1837 struct scsi_status_iu_header *siu;
1841 if (scb->flags & SCB_SENSE) {
1842 sense_size = MIN(sizeof(struct scsi_sense_data)
1843 - ahd_get_sense_residual(scb),
1844 sizeof(cmd->sense_buffer));
1848 * Copy only the sense data into the provided
1851 siu = (struct scsi_status_iu_header *)
1853 sense_size = MIN(scsi_4btoul(siu->sense_length),
1854 sizeof(cmd->sense_buffer));
1855 sense_offset = SIU_SENSE_OFFSET(siu);
1858 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1859 memcpy(cmd->sense_buffer,
1860 ahd_get_sense_buf(ahd, scb)
1861 + sense_offset, sense_size);
1862 cmd->result |= (DRIVER_SENSE << 24);
1865 if (ahd_debug & AHD_SHOW_SENSE) {
1868 printf("Copied %d bytes of sense data at %d:",
1869 sense_size, sense_offset);
1870 for (i = 0; i < sense_size; i++) {
1873 printf("0x%x ", cmd->sense_buffer[i]);
1881 case SCSI_STATUS_QUEUE_FULL:
1883 * By the time the core driver has returned this
1884 * command, all other commands that were queued
1885 * to us but not the device have been returned.
1886 * This ensures that dev->active is equal to
1887 * the number of commands actually queued to
1890 dev->tag_success_count = 0;
1891 if (dev->active != 0) {
1893 * Drop our opening count to the number
1894 * of commands currently outstanding.
1898 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1899 ahd_print_path(ahd, scb);
1900 printf("Dropping tag count to %d\n",
1904 if (dev->active == dev->tags_on_last_queuefull) {
1906 dev->last_queuefull_same_count++;
1908 * If we repeatedly see a queue full
1909 * at the same queue depth, this
1910 * device has a fixed number of tag
1911 * slots. Lock in this tag depth
1912 * so we stop seeing queue fulls from
1915 if (dev->last_queuefull_same_count
1916 == AHD_LOCK_TAGS_COUNT) {
1917 dev->maxtags = dev->active;
1918 ahd_print_path(ahd, scb);
1919 printf("Locking max tag count at %d\n",
1923 dev->tags_on_last_queuefull = dev->active;
1924 dev->last_queuefull_same_count = 0;
1926 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1927 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1928 ahd_platform_set_tags(ahd, &devinfo,
1929 (dev->flags & AHD_DEV_Q_BASIC)
1930 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1934 * Drop down to a single opening, and treat this
1935 * as if the target returned BUSY SCSI status.
1938 ahd_platform_set_tags(ahd, &devinfo,
1939 (dev->flags & AHD_DEV_Q_BASIC)
1940 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1941 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1946 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1949 * Map CAM error codes into Linux Error codes. We
1950 * avoid the conversion so that the DV code has the
1951 * full error information available when making
1952 * state change decisions.
1958 status = ahd_cmd_get_transaction_status(cmd);
1960 case CAM_REQ_INPROG:
1962 case CAM_SCSI_STATUS_ERROR:
1963 new_status = DID_OK;
1965 case CAM_REQ_ABORTED:
1966 new_status = DID_ABORT;
1969 new_status = DID_BUS_BUSY;
1971 case CAM_REQ_INVALID:
1972 case CAM_PATH_INVALID:
1973 new_status = DID_BAD_TARGET;
1975 case CAM_SEL_TIMEOUT:
1976 new_status = DID_NO_CONNECT;
1978 case CAM_SCSI_BUS_RESET:
1980 new_status = DID_RESET;
1982 case CAM_UNCOR_PARITY:
1983 new_status = DID_PARITY;
1985 case CAM_CMD_TIMEOUT:
1986 new_status = DID_TIME_OUT;
1989 case CAM_REQ_CMP_ERR:
1990 case CAM_AUTOSENSE_FAIL:
1992 case CAM_DATA_RUN_ERR:
1993 case CAM_UNEXP_BUSFREE:
1994 case CAM_SEQUENCE_FAIL:
1995 case CAM_CCB_LEN_ERR:
1996 case CAM_PROVIDE_FAIL:
1997 case CAM_REQ_TERMIO:
1998 case CAM_UNREC_HBA_ERROR:
1999 case CAM_REQ_TOO_BIG:
2000 new_status = DID_ERROR;
2002 case CAM_REQUEUE_REQ:
2003 new_status = DID_REQUEUE;
2006 /* We should never get here */
2007 new_status = DID_ERROR;
2011 ahd_cmd_set_transaction_status(cmd, new_status);
2014 cmd->scsi_done(cmd);
2018 ahd_linux_sem_timeout(u_long arg)
2020 struct ahd_softc *ahd;
2023 ahd = (struct ahd_softc *)arg;
2026 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) {
2027 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM;
2028 up(&ahd->platform_data->eh_sem);
2030 ahd_unlock(ahd, &s);
2034 ahd_freeze_simq(struct ahd_softc *ahd)
2036 ahd->platform_data->qfrozen++;
2037 if (ahd->platform_data->qfrozen == 1) {
2038 scsi_block_requests(ahd->platform_data->host);
2039 ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2040 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2041 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2046 ahd_release_simq(struct ahd_softc *ahd)
2053 if (ahd->platform_data->qfrozen > 0)
2054 ahd->platform_data->qfrozen--;
2055 if (ahd->platform_data->qfrozen == 0) {
2058 ahd_unlock(ahd, &s);
2060 * There is still a race here. The mid-layer
2061 * should keep its own freeze count and use
2062 * a bottom half handler to run the queues
2063 * so we can unblock with our own lock held.
2066 scsi_unblock_requests(ahd->platform_data->host);
2070 ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2072 struct ahd_softc *ahd;
2073 struct ahd_linux_device *dev;
2074 struct scb *pending_scb;
2076 u_int active_scbptr;
2086 ahd_mode_state saved_modes;
2087 unsigned long flags;
2092 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2094 scmd_printk(KERN_INFO, cmd,
2095 "Attempting to queue a%s message:",
2096 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2099 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2100 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2103 ahd_lock(ahd, &flags);
2106 * First determine if we currently own this command.
2107 * Start by searching the device queue. If not found
2108 * there, check the pending_scb list. If not found
2109 * at all, and the system wanted us to just abort the
2110 * command, return success.
2112 dev = scsi_transport_device_data(cmd->device);
2116 * No target device for this command exists,
2117 * so we must not still own the command.
2119 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2125 * See if we can find a matching cmd in the pending list.
2127 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2128 if (pending_scb->io_ctx == cmd)
2132 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2134 /* Any SCB for this device will do for a target reset */
2135 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2136 if (ahd_match_scb(ahd, pending_scb,
2138 scmd_channel(cmd) + 'A',
2140 SCB_LIST_NULL, ROLE_INITIATOR))
2145 if (pending_scb == NULL) {
2146 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2150 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2152 * We can't queue two recovery actions using the same SCB
2159 * Ensure that the card doesn't do anything
2160 * behind our back. Also make sure that we
2161 * didn't "just" miss an interrupt that would
2164 was_paused = ahd_is_paused(ahd);
2165 ahd_pause_and_flushwork(ahd);
2168 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2169 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2173 printf("%s: At time of recovery, card was %spaused\n",
2174 ahd_name(ahd), was_paused ? "" : "not ");
2175 ahd_dump_card_state(ahd);
2177 disconnected = TRUE;
2178 if (flag == SCB_ABORT) {
2179 if (ahd_search_qinfifo(ahd, cmd->device->id,
2180 cmd->device->channel + 'A',
2182 pending_scb->hscb->tag,
2183 ROLE_INITIATOR, CAM_REQ_ABORTED,
2184 SEARCH_COMPLETE) > 0) {
2185 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2186 ahd_name(ahd), cmd->device->channel,
2187 cmd->device->id, cmd->device->lun);
2191 } else if (ahd_search_qinfifo(ahd, cmd->device->id,
2192 cmd->device->channel + 'A',
2193 cmd->device->lun, pending_scb->hscb->tag,
2194 ROLE_INITIATOR, /*status*/0,
2195 SEARCH_COUNT) > 0) {
2196 disconnected = FALSE;
2199 saved_modes = ahd_save_modes(ahd);
2200 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2201 last_phase = ahd_inb(ahd, LASTPHASE);
2202 saved_scbptr = ahd_get_scbptr(ahd);
2203 active_scbptr = saved_scbptr;
2204 if (disconnected && ((last_phase != P_BUSFREE) ||
2205 (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0)) {
2206 struct scb *bus_scb;
2208 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2209 if (bus_scb == pending_scb)
2210 disconnected = FALSE;
2211 else if (flag != SCB_ABORT
2212 && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid
2213 && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2214 disconnected = FALSE;
2218 * At this point, pending_scb is the scb associated with the
2219 * passed in command. That command is currently active on the
2220 * bus or is in the disconnected state.
2222 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2223 if (SCB_GET_TAG(pending_scb) == active_scbptr
2224 || (flag == SCB_DEVICE_RESET
2225 && SCSIID_TARGET(ahd, saved_scsiid) == scmd_id(cmd))) {
2228 * We're active on the bus, so assert ATN
2229 * and hope that the target responds.
2231 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2232 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_DEVICE_RESET;
2233 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2234 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2235 scmd_printk(KERN_INFO, cmd, "BDR message in message buffer\n");
2237 } else if (last_phase != P_BUSFREE
2238 && ahd_inb(ahd, SCSIPHASE) == 0) {
2240 * SCB is not identified, there
2241 * is no pending REQ, and the sequencer
2242 * has not seen a busfree. Looks like
2243 * a stuck connection waiting to
2244 * go busfree. Reset the bus.
2246 found = ahd_reset_channel(ahd, cmd->device->channel + 'A',
2247 /*Initiate Reset*/TRUE);
2248 printf("%s: Issued Channel %c Bus Reset. "
2249 "%d SCBs aborted\n", ahd_name(ahd),
2250 cmd->device->channel + 'A', found);
2251 } else if (disconnected) {
2254 * Actually re-queue this SCB in an attempt
2255 * to select the device before it reconnects.
2257 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2258 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2259 pending_scb->hscb->cdb_len = 0;
2260 pending_scb->hscb->task_attribute = 0;
2261 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2263 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2265 * Mark the SCB has having an outstanding
2266 * task management function. Should the command
2267 * complete normally before the task management
2268 * function can be sent, the host will be notified
2269 * to abort our requeued SCB.
2271 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2272 pending_scb->hscb->task_management);
2275 * If non-packetized, set the MK_MESSAGE control
2276 * bit indicating that we desire to send a message.
2277 * We also set the disconnected flag since there is
2278 * no guarantee that our SCB control byte matches
2279 * the version on the card. We don't want the
2280 * sequencer to abort the command thinking an
2281 * unsolicited reselection occurred.
2283 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2286 * The sequencer will never re-reference the
2287 * in-core SCB. To make sure we are notified
2288 * during reslection, set the MK_MESSAGE flag in
2289 * the card's copy of the SCB.
2291 ahd_outb(ahd, SCB_CONTROL,
2292 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2296 * Clear out any entries in the QINFIFO first
2297 * so we are the next SCB for this target
2300 ahd_search_qinfifo(ahd, cmd->device->id,
2301 cmd->device->channel + 'A', cmd->device->lun,
2302 SCB_LIST_NULL, ROLE_INITIATOR,
2303 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2304 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2305 ahd_set_scbptr(ahd, saved_scbptr);
2306 ahd_print_path(ahd, pending_scb);
2307 printf("Device is disconnected, re-queuing SCB\n");
2310 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2317 * Our assumption is that if we don't have the command, no
2318 * recovery action was required, so we return success. Again,
2319 * the semantics of the mid-layer recovery engine are not
2320 * well defined, so this may change in time.
2327 struct timer_list timer;
2330 ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM;
2331 ahd_unlock(ahd, &flags);
2334 timer.data = (u_long)ahd;
2335 timer.expires = jiffies + (5 * HZ);
2336 timer.function = ahd_linux_sem_timeout;
2338 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2339 down(&ahd->platform_data->eh_sem);
2340 printf("%s: Recovery code awake\n", ahd_name(ahd));
2341 ret = del_timer_sync(&timer);
2343 printf("%s: Timer Expired (active %d)\n",
2344 ahd_name(ahd), dev->active);
2348 ahd_unlock(ahd, &flags);
2352 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2354 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2355 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2356 struct ahd_devinfo devinfo;
2357 unsigned long flags;
2359 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2360 starget->channel + 'A', ROLE_INITIATOR);
2361 ahd_lock(ahd, &flags);
2362 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2363 ahd_unlock(ahd, &flags);
2366 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2368 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2369 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2370 struct ahd_tmode_tstate *tstate;
2371 struct ahd_initiator_tinfo *tinfo
2372 = ahd_fetch_transinfo(ahd,
2373 starget->channel + 'A',
2374 shost->this_id, starget->id, &tstate);
2375 struct ahd_devinfo devinfo;
2376 unsigned int ppr_options = tinfo->goal.ppr_options;
2378 unsigned long flags;
2379 unsigned long offset = tinfo->goal.offset;
2382 if ((ahd_debug & AHD_SHOW_DV) != 0)
2383 printf("%s: set period to %d\n", ahd_name(ahd), period);
2386 offset = MAX_OFFSET;
2391 ppr_options |= MSG_EXT_PPR_DT_REQ;
2393 ppr_options |= MSG_EXT_PPR_IU_REQ;
2396 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2398 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2399 starget->channel + 'A', ROLE_INITIATOR);
2401 /* all PPR requests apart from QAS require wide transfers */
2402 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2403 if (spi_width(starget) == 0)
2404 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2407 ahd_find_syncrate(ahd, &period, &ppr_options,
2408 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2410 ahd_lock(ahd, &flags);
2411 ahd_set_syncrate(ahd, &devinfo, period, offset,
2412 ppr_options, AHD_TRANS_GOAL, FALSE);
2413 ahd_unlock(ahd, &flags);
2416 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2418 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2419 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2420 struct ahd_tmode_tstate *tstate;
2421 struct ahd_initiator_tinfo *tinfo
2422 = ahd_fetch_transinfo(ahd,
2423 starget->channel + 'A',
2424 shost->this_id, starget->id, &tstate);
2425 struct ahd_devinfo devinfo;
2426 unsigned int ppr_options = 0;
2427 unsigned int period = 0;
2428 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2429 unsigned long flags;
2432 if ((ahd_debug & AHD_SHOW_DV) != 0)
2433 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2436 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2437 starget->channel + 'A', ROLE_INITIATOR);
2439 period = tinfo->goal.period;
2440 ppr_options = tinfo->goal.ppr_options;
2441 ahd_find_syncrate(ahd, &period, &ppr_options,
2442 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2445 ahd_lock(ahd, &flags);
2446 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2447 AHD_TRANS_GOAL, FALSE);
2448 ahd_unlock(ahd, &flags);
2451 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2453 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2454 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2455 struct ahd_tmode_tstate *tstate;
2456 struct ahd_initiator_tinfo *tinfo
2457 = ahd_fetch_transinfo(ahd,
2458 starget->channel + 'A',
2459 shost->this_id, starget->id, &tstate);
2460 struct ahd_devinfo devinfo;
2461 unsigned int ppr_options = tinfo->goal.ppr_options
2462 & ~MSG_EXT_PPR_DT_REQ;
2463 unsigned int period = tinfo->goal.period;
2464 unsigned int width = tinfo->goal.width;
2465 unsigned long flags;
2468 if ((ahd_debug & AHD_SHOW_DV) != 0)
2469 printf("%s: %s DT\n", ahd_name(ahd),
2470 dt ? "enabling" : "disabling");
2473 ppr_options |= MSG_EXT_PPR_DT_REQ;
2475 ahd_linux_set_width(starget, 1);
2478 period = 10; /* If resetting DT, period must be >= 25ns */
2479 /* IU is invalid without DT set */
2480 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2482 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2483 starget->channel + 'A', ROLE_INITIATOR);
2484 ahd_find_syncrate(ahd, &period, &ppr_options,
2485 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2487 ahd_lock(ahd, &flags);
2488 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2489 ppr_options, AHD_TRANS_GOAL, FALSE);
2490 ahd_unlock(ahd, &flags);
2493 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2495 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2496 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2497 struct ahd_tmode_tstate *tstate;
2498 struct ahd_initiator_tinfo *tinfo
2499 = ahd_fetch_transinfo(ahd,
2500 starget->channel + 'A',
2501 shost->this_id, starget->id, &tstate);
2502 struct ahd_devinfo devinfo;
2503 unsigned int ppr_options = tinfo->goal.ppr_options
2504 & ~MSG_EXT_PPR_QAS_REQ;
2505 unsigned int period = tinfo->goal.period;
2507 unsigned long flags;
2510 if ((ahd_debug & AHD_SHOW_DV) != 0)
2511 printf("%s: %s QAS\n", ahd_name(ahd),
2512 qas ? "enabling" : "disabling");
2516 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2519 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2521 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2522 starget->channel + 'A', ROLE_INITIATOR);
2523 ahd_find_syncrate(ahd, &period, &ppr_options,
2524 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2526 ahd_lock(ahd, &flags);
2527 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2528 ppr_options, AHD_TRANS_GOAL, FALSE);
2529 ahd_unlock(ahd, &flags);
2532 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2534 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2535 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2536 struct ahd_tmode_tstate *tstate;
2537 struct ahd_initiator_tinfo *tinfo
2538 = ahd_fetch_transinfo(ahd,
2539 starget->channel + 'A',
2540 shost->this_id, starget->id, &tstate);
2541 struct ahd_devinfo devinfo;
2542 unsigned int ppr_options = tinfo->goal.ppr_options
2543 & ~MSG_EXT_PPR_IU_REQ;
2544 unsigned int period = tinfo->goal.period;
2546 unsigned long flags;
2549 if ((ahd_debug & AHD_SHOW_DV) != 0)
2550 printf("%s: %s IU\n", ahd_name(ahd),
2551 iu ? "enabling" : "disabling");
2555 ppr_options |= MSG_EXT_PPR_IU_REQ;
2556 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2559 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2561 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2562 starget->channel + 'A', ROLE_INITIATOR);
2563 ahd_find_syncrate(ahd, &period, &ppr_options,
2564 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2566 ahd_lock(ahd, &flags);
2567 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2568 ppr_options, AHD_TRANS_GOAL, FALSE);
2569 ahd_unlock(ahd, &flags);
2572 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2574 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2575 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2576 struct ahd_tmode_tstate *tstate;
2577 struct ahd_initiator_tinfo *tinfo
2578 = ahd_fetch_transinfo(ahd,
2579 starget->channel + 'A',
2580 shost->this_id, starget->id, &tstate);
2581 struct ahd_devinfo devinfo;
2582 unsigned int ppr_options = tinfo->goal.ppr_options
2583 & ~MSG_EXT_PPR_RD_STRM;
2584 unsigned int period = tinfo->goal.period;
2585 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2586 unsigned long flags;
2589 if ((ahd_debug & AHD_SHOW_DV) != 0)
2590 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2591 rdstrm ? "enabling" : "disabling");
2595 ppr_options |= MSG_EXT_PPR_RD_STRM;
2597 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2598 starget->channel + 'A', ROLE_INITIATOR);
2599 ahd_find_syncrate(ahd, &period, &ppr_options,
2600 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2602 ahd_lock(ahd, &flags);
2603 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2604 ppr_options, AHD_TRANS_GOAL, FALSE);
2605 ahd_unlock(ahd, &flags);
2608 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2610 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2611 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2612 struct ahd_tmode_tstate *tstate;
2613 struct ahd_initiator_tinfo *tinfo
2614 = ahd_fetch_transinfo(ahd,
2615 starget->channel + 'A',
2616 shost->this_id, starget->id, &tstate);
2617 struct ahd_devinfo devinfo;
2618 unsigned int ppr_options = tinfo->goal.ppr_options
2619 & ~MSG_EXT_PPR_WR_FLOW;
2620 unsigned int period = tinfo->goal.period;
2621 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2622 unsigned long flags;
2625 if ((ahd_debug & AHD_SHOW_DV) != 0)
2626 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2627 wrflow ? "enabling" : "disabling");
2631 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2633 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2634 starget->channel + 'A', ROLE_INITIATOR);
2635 ahd_find_syncrate(ahd, &period, &ppr_options,
2636 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2638 ahd_lock(ahd, &flags);
2639 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2640 ppr_options, AHD_TRANS_GOAL, FALSE);
2641 ahd_unlock(ahd, &flags);
2644 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2646 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2647 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2648 struct ahd_tmode_tstate *tstate;
2649 struct ahd_initiator_tinfo *tinfo
2650 = ahd_fetch_transinfo(ahd,
2651 starget->channel + 'A',
2652 shost->this_id, starget->id, &tstate);
2653 struct ahd_devinfo devinfo;
2654 unsigned int ppr_options = tinfo->goal.ppr_options
2656 unsigned int period = tinfo->goal.period;
2657 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2658 unsigned long flags;
2660 if ((ahd->features & AHD_RTI) == 0) {
2662 if ((ahd_debug & AHD_SHOW_DV) != 0)
2663 printf("%s: RTI not available\n", ahd_name(ahd));
2669 if ((ahd_debug & AHD_SHOW_DV) != 0)
2670 printf("%s: %s RTI\n", ahd_name(ahd),
2671 rti ? "enabling" : "disabling");
2675 ppr_options |= MSG_EXT_PPR_RTI;
2677 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2678 starget->channel + 'A', ROLE_INITIATOR);
2679 ahd_find_syncrate(ahd, &period, &ppr_options,
2680 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2682 ahd_lock(ahd, &flags);
2683 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2684 ppr_options, AHD_TRANS_GOAL, FALSE);
2685 ahd_unlock(ahd, &flags);
2688 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2690 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2691 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2692 struct ahd_tmode_tstate *tstate;
2693 struct ahd_initiator_tinfo *tinfo
2694 = ahd_fetch_transinfo(ahd,
2695 starget->channel + 'A',
2696 shost->this_id, starget->id, &tstate);
2697 struct ahd_devinfo devinfo;
2698 unsigned int ppr_options = tinfo->goal.ppr_options
2699 & ~MSG_EXT_PPR_PCOMP_EN;
2700 unsigned int period = tinfo->goal.period;
2701 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2702 unsigned long flags;
2705 if ((ahd_debug & AHD_SHOW_DV) != 0)
2706 printf("%s: %s Precompensation\n", ahd_name(ahd),
2707 pcomp ? "Enable" : "Disable");
2711 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2713 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2714 starget->channel + 'A', ROLE_INITIATOR);
2715 ahd_find_syncrate(ahd, &period, &ppr_options,
2716 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2718 ahd_lock(ahd, &flags);
2719 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2720 ppr_options, AHD_TRANS_GOAL, FALSE);
2721 ahd_unlock(ahd, &flags);
2724 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2726 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2727 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2728 struct ahd_tmode_tstate *tstate;
2729 struct ahd_initiator_tinfo *tinfo
2730 = ahd_fetch_transinfo(ahd,
2731 starget->channel + 'A',
2732 shost->this_id, starget->id, &tstate);
2733 struct ahd_devinfo devinfo;
2734 unsigned int ppr_options = tinfo->goal.ppr_options
2735 & ~MSG_EXT_PPR_HOLD_MCS;
2736 unsigned int period = tinfo->goal.period;
2737 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2738 unsigned long flags;
2741 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2743 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2744 starget->channel + 'A', ROLE_INITIATOR);
2745 ahd_find_syncrate(ahd, &period, &ppr_options,
2746 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2748 ahd_lock(ahd, &flags);
2749 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2750 ppr_options, AHD_TRANS_GOAL, FALSE);
2751 ahd_unlock(ahd, &flags);
2756 static struct spi_function_template ahd_linux_transport_functions = {
2757 .set_offset = ahd_linux_set_offset,
2759 .set_period = ahd_linux_set_period,
2761 .set_width = ahd_linux_set_width,
2763 .set_dt = ahd_linux_set_dt,
2765 .set_iu = ahd_linux_set_iu,
2767 .set_qas = ahd_linux_set_qas,
2769 .set_rd_strm = ahd_linux_set_rd_strm,
2771 .set_wr_flow = ahd_linux_set_wr_flow,
2773 .set_rti = ahd_linux_set_rti,
2775 .set_pcomp_en = ahd_linux_set_pcomp_en,
2777 .set_hold_mcs = ahd_linux_set_hold_mcs,
2782 ahd_linux_init(void)
2787 * If we've been passed any parameters, process them now.
2790 aic79xx_setup(aic79xx);
2792 ahd_linux_transport_template =
2793 spi_attach_transport(&ahd_linux_transport_functions);
2794 if (!ahd_linux_transport_template)
2797 scsi_transport_reserve_target(ahd_linux_transport_template,
2798 sizeof(struct ahd_linux_target));
2799 scsi_transport_reserve_device(ahd_linux_transport_template,
2800 sizeof(struct ahd_linux_device));
2802 error = ahd_linux_pci_init();
2804 spi_release_transport(ahd_linux_transport_template);
2809 ahd_linux_exit(void)
2811 ahd_linux_pci_exit();
2812 spi_release_transport(ahd_linux_transport_template);
2815 module_init(ahd_linux_init);
2816 module_exit(ahd_linux_exit);