2 * Adaptec AIC7xxx device driver for Linux.
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
6 * Copyright (c) 1994 John Aycock
7 * The University of Calgary Department of Computer Science.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, write to
21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
24 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
25 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
26 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
27 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
28 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
29 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
30 * ANSI SCSI-2 specification (draft 10c), ...
32 * --------------------------------------------------------------------------
34 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
36 * Substantially modified to include support for wide and twin bus
37 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
38 * SCB paging, and other rework of the code.
40 * --------------------------------------------------------------------------
41 * Copyright (c) 1994-2000 Justin T. Gibbs.
42 * Copyright (c) 2000-2001 Adaptec Inc.
43 * All rights reserved.
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions, and the following disclaimer,
50 * without modification.
51 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
52 * substantially similar to the "NO WARRANTY" disclaimer below
53 * ("Disclaimer") and any redistribution must be conditioned upon
54 * including a substantially similar Disclaimer requirement for further
55 * binary redistribution.
56 * 3. Neither the names of the above-listed copyright holders nor the names
57 * of any contributors may be used to endorse or promote products derived
58 * from this software without specific prior written permission.
60 * Alternatively, this software may be distributed under the terms of the
61 * GNU General Public License ("GPL") version 2 as published by the Free
62 * Software Foundation.
65 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
66 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
67 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
68 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
69 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
73 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
74 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
75 * POSSIBILITY OF SUCH DAMAGES.
77 *---------------------------------------------------------------------------
79 * Thanks also go to (in alphabetical order) the following:
81 * Rory Bolt - Sequencer bug fixes
82 * Jay Estabrook - Initial DEC Alpha support
83 * Doug Ledford - Much needed abort/reset bug fixes
84 * Kai Makisara - DMAing of SCBs
86 * A Boot time option was also added for not resetting the scsi bus.
88 * Form: aic7xxx=extended
92 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
94 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
98 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
100 * Copyright (c) 1997-1999 Doug Ledford
102 * These changes are released under the same licensing terms as the FreeBSD
103 * driver written by Justin Gibbs. Please see his Copyright notice above
104 * for the exact terms and conditions covering my changes as well as the
105 * warranty statement.
107 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
108 * but are not limited to:
110 * 1: Import of the latest FreeBSD sequencer code for this driver
111 * 2: Modification of kernel code to accommodate different sequencer semantics
112 * 3: Extensive changes throughout kernel portion of driver to improve
113 * abort/reset processing and error hanndling
114 * 4: Other work contributed by various people on the Internet
115 * 5: Changes to printk information and verbosity selection code
116 * 6: General reliability related changes, especially in IRQ management
117 * 7: Modifications to the default probe/attach order for supported cards
118 * 8: SMP friendliness has been improved
122 #include "aic7xxx_osm.h"
123 #include "aic7xxx_inline.h"
124 #include <scsi/scsicam.h>
126 static struct scsi_transport_template *ahc_linux_transport_template = NULL;
128 #include <linux/init.h> /* __setup */
129 #include <linux/mm.h> /* For fetching system memory size */
130 #include <linux/blkdev.h> /* For block_size() */
131 #include <linux/delay.h> /* For ssleep/msleep */
135 * Set this to the delay in seconds after SCSI bus reset.
136 * Note, we honor this only for the initial bus reset.
137 * The scsi error recovery code performs its own bus settle
138 * delay handling for error recovery actions.
140 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
141 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
143 #define AIC7XXX_RESET_DELAY 5000
147 * Control collection of SCSI transfer statistics for the /proc filesystem.
149 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
150 * NOTE: This does affect performance since it has to maintain statistics.
152 #ifdef CONFIG_AIC7XXX_PROC_STATS
153 #define AIC7XXX_PROC_STATS
157 * To change the default number of tagged transactions allowed per-device,
158 * add a line to the lilo.conf file like:
159 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
160 * which will result in the first four devices on the first two
161 * controllers being set to a tagged queue depth of 32.
163 * The tag_commands is an array of 16 to allow for wide and twin adapters.
164 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
168 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
169 } adapter_tag_info_t;
172 * Modify this as you see fit for your system.
174 * 0 tagged queuing disabled
175 * 1 <= n <= 253 n == max tags ever dispatched.
177 * The driver will throttle the number of commands dispatched to a
178 * device if it returns queue full. For devices with a fixed maximum
179 * queue depth, the driver will eventually determine this depth and
180 * lock it in (a console message is printed to indicate that a lock
181 * has occurred). On some devices, queue full is returned for a temporary
182 * resource shortage. These devices will return queue full at varying
183 * depths. The driver will throttle back when the queue fulls occur and
184 * attempt to slowly increase the depth over time as the device recovers
185 * from the resource shortage.
187 * In this example, the first line will disable tagged queueing for all
188 * the devices on the first probed aic7xxx adapter.
190 * The second line enables tagged queueing with 4 commands/LUN for IDs
191 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
192 * driver to attempt to use up to 64 tags for ID 1.
194 * The third line is the same as the first line.
196 * The fourth line disables tagged queueing for devices 0 and 3. It
197 * enables tagged queueing for the other IDs, with 16 commands/LUN
198 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
199 * IDs 2, 5-7, and 9-15.
203 * NOTE: The below structure is for reference only, the actual structure
204 * to modify in order to change things is just below this comment block.
205 adapter_tag_info_t aic7xxx_tag_info[] =
207 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
208 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
209 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
210 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
214 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
215 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
217 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
220 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
221 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
222 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
223 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
224 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
225 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
226 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
227 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
228 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
232 * By default, use the number of commands specified by
233 * the users kernel configuration.
235 static adapter_tag_info_t aic7xxx_tag_info[] =
237 {AIC7XXX_CONFIGED_TAG_COMMANDS},
238 {AIC7XXX_CONFIGED_TAG_COMMANDS},
239 {AIC7XXX_CONFIGED_TAG_COMMANDS},
240 {AIC7XXX_CONFIGED_TAG_COMMANDS},
241 {AIC7XXX_CONFIGED_TAG_COMMANDS},
242 {AIC7XXX_CONFIGED_TAG_COMMANDS},
243 {AIC7XXX_CONFIGED_TAG_COMMANDS},
244 {AIC7XXX_CONFIGED_TAG_COMMANDS},
245 {AIC7XXX_CONFIGED_TAG_COMMANDS},
246 {AIC7XXX_CONFIGED_TAG_COMMANDS},
247 {AIC7XXX_CONFIGED_TAG_COMMANDS},
248 {AIC7XXX_CONFIGED_TAG_COMMANDS},
249 {AIC7XXX_CONFIGED_TAG_COMMANDS},
250 {AIC7XXX_CONFIGED_TAG_COMMANDS},
251 {AIC7XXX_CONFIGED_TAG_COMMANDS},
252 {AIC7XXX_CONFIGED_TAG_COMMANDS}
256 * There should be a specific return value for this in scsi.h, but
257 * it seems that most drivers ignore it.
259 #define DID_UNDERFLOW DID_ERROR
262 ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
264 printk("(scsi%d:%c:%d:%d): ",
265 ahc->platform_data->host->host_no,
266 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
267 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
268 scb != NULL ? SCB_GET_LUN(scb) : -1);
272 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
273 * cards in the system. This should be fixed. Exceptions to this
274 * rule are noted in the comments.
278 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
279 * has no effect on any later resets that might occur due to things like
282 static uint32_t aic7xxx_no_reset;
285 * Should we force EXTENDED translation on a controller.
286 * 0 == Use whatever is in the SEEPROM or default to off
287 * 1 == Use whatever is in the SEEPROM or default to on
289 static uint32_t aic7xxx_extended;
292 * PCI bus parity checking of the Adaptec controllers. This is somewhat
293 * dubious at best. To my knowledge, this option has never actually
294 * solved a PCI parity problem, but on certain machines with broken PCI
295 * chipset configurations where stray PCI transactions with bad parity are
296 * the norm rather than the exception, the error messages can be overwelming.
297 * It's included in the driver for completeness.
298 * 0 = Shut off PCI parity check
299 * non-0 = reverse polarity pci parity checking
301 static uint32_t aic7xxx_pci_parity = ~0;
304 * There are lots of broken chipsets in the world. Some of them will
305 * violate the PCI spec when we issue byte sized memory writes to our
306 * controller. I/O mapped register access, if allowed by the given
307 * platform, will work in almost all cases.
309 uint32_t aic7xxx_allow_memio = ~0;
312 * So that we can set how long each device is given as a selection timeout.
313 * The table of values goes like this:
318 * We default to 256ms because some older devices need a longer time
319 * to respond to initial selection.
321 static uint32_t aic7xxx_seltime;
324 * Certain devices do not perform any aging on commands. Should the
325 * device be saturated by commands in one portion of the disk, it is
326 * possible for transactions on far away sectors to never be serviced.
327 * To handle these devices, we can periodically send an ordered tag to
328 * force all outstanding transactions to be serviced prior to a new
331 static uint32_t aic7xxx_periodic_otag;
334 * Module information and settable options.
336 static char *aic7xxx = NULL;
338 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
339 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
340 MODULE_LICENSE("Dual BSD/GPL");
341 MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
342 module_param(aic7xxx, charp, 0444);
343 MODULE_PARM_DESC(aic7xxx,
344 "period-delimited options string:\n"
345 " verbose Enable verbose/diagnostic logging\n"
346 " allow_memio Allow device registers to be memory mapped\n"
347 " debug Bitmask of debug values to enable\n"
348 " no_probe Toggle EISA/VLB controller probing\n"
349 " probe_eisa_vl Toggle EISA/VLB controller probing\n"
350 " no_reset Supress initial bus resets\n"
351 " extended Enable extended geometry on all controllers\n"
352 " periodic_otag Send an ordered tagged transaction\n"
353 " periodically to prevent tag starvation.\n"
354 " This may be required by some older disk\n"
355 " drives or RAID arrays.\n"
356 " tag_info:<tag_str> Set per-target tag depth\n"
357 " global_tag_depth:<int> Global tag depth for every target\n"
359 " seltime:<int> Selection Timeout\n"
360 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
362 " Sample /etc/modprobe.conf line:\n"
363 " Toggle EISA/VLB probing\n"
364 " Set tag depth on Controller 1/Target 1 to 10 tags\n"
365 " Shorten the selection timeout to 128ms\n"
367 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
370 static void ahc_linux_handle_scsi_status(struct ahc_softc *,
371 struct scsi_device *,
373 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
374 struct scsi_cmnd *cmd);
375 static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
376 static void ahc_linux_release_simq(struct ahc_softc *ahc);
377 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
378 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
379 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
380 struct ahc_devinfo *devinfo);
381 static void ahc_linux_device_queue_depth(struct scsi_device *);
382 static int ahc_linux_run_command(struct ahc_softc*,
383 struct ahc_linux_device *,
385 static void ahc_linux_setup_tag_info_global(char *p);
386 static int aic7xxx_setup(char *s);
388 static int ahc_linux_unit;
391 /********************************* Inlines ************************************/
392 static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
394 static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
395 struct ahc_dma_seg *sg,
396 dma_addr_t addr, bus_size_t len);
399 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
401 struct scsi_cmnd *cmd;
404 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
410 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
411 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
415 if ((scb->sg_count + 1) > AHC_NSEG)
416 panic("Too few segs for dma mapping. "
417 "Increase AHC_NSEG\n");
420 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
421 scb->platform_data->xfer_len += len;
423 if (sizeof(dma_addr_t) > 4
424 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
425 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
427 sg->len = ahc_htole32(len);
432 * Return a string describing the driver.
435 ahc_linux_info(struct Scsi_Host *host)
437 static char buffer[512];
440 struct ahc_softc *ahc;
443 ahc = *(struct ahc_softc **)host->hostdata;
444 memset(bp, 0, sizeof(buffer));
445 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
446 strcat(bp, AIC7XXX_DRIVER_VERSION);
449 strcat(bp, ahc->description);
452 ahc_controller_info(ahc, ahc_info);
453 strcat(bp, ahc_info);
460 * Queue an SCB to the controller.
463 ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
465 struct ahc_softc *ahc;
466 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
467 int rtn = SCSI_MLQUEUE_HOST_BUSY;
470 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
472 ahc_lock(ahc, &flags);
473 if (ahc->platform_data->qfrozen == 0) {
474 cmd->scsi_done = scsi_done;
475 cmd->result = CAM_REQ_INPROG << 16;
476 rtn = ahc_linux_run_command(ahc, dev, cmd);
478 ahc_unlock(ahc, &flags);
483 static inline struct scsi_target **
484 ahc_linux_target_in_softc(struct scsi_target *starget)
486 struct ahc_softc *ahc =
487 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
488 unsigned int target_offset;
490 target_offset = starget->id;
491 if (starget->channel != 0)
494 return &ahc->platform_data->starget[target_offset];
498 ahc_linux_target_alloc(struct scsi_target *starget)
500 struct ahc_softc *ahc =
501 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
502 struct seeprom_config *sc = ahc->seep_config;
504 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
505 unsigned short scsirate;
506 struct ahc_devinfo devinfo;
507 struct ahc_initiator_tinfo *tinfo;
508 struct ahc_tmode_tstate *tstate;
509 char channel = starget->channel + 'A';
510 unsigned int our_id = ahc->our_id;
511 unsigned int target_offset;
513 target_offset = starget->id;
514 if (starget->channel != 0)
517 if (starget->channel)
518 our_id = ahc->our_id_b;
520 ahc_lock(ahc, &flags);
522 BUG_ON(*ahc_targp != NULL);
524 *ahc_targp = starget;
527 int maxsync = AHC_SYNCRATE_DT;
529 int flags = sc->device_flags[target_offset];
531 if (ahc->flags & AHC_NEWEEPROM_FMT) {
532 if (flags & CFSYNCHISULTRA)
534 } else if (flags & CFULTRAEN)
536 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
537 * change it to ultra=0, CFXFER = 0 */
538 if(ultra && (flags & CFXFER) == 0x04) {
543 if ((ahc->features & AHC_ULTRA2) != 0) {
544 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
546 scsirate = (flags & CFXFER) << 4;
547 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
550 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
551 if (!(flags & CFSYNCH))
552 spi_max_offset(starget) = 0;
553 spi_min_period(starget) =
554 ahc_find_period(ahc, scsirate, maxsync);
556 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
557 starget->id, &tstate);
559 ahc_compile_devinfo(&devinfo, our_id, starget->id,
560 CAM_LUN_WILDCARD, channel,
562 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
563 AHC_TRANS_GOAL, /*paused*/FALSE);
564 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
565 AHC_TRANS_GOAL, /*paused*/FALSE);
566 ahc_unlock(ahc, &flags);
572 ahc_linux_target_destroy(struct scsi_target *starget)
574 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
580 ahc_linux_slave_alloc(struct scsi_device *sdev)
582 struct ahc_softc *ahc =
583 *((struct ahc_softc **)sdev->host->hostdata);
584 struct scsi_target *starget = sdev->sdev_target;
585 struct ahc_linux_device *dev;
588 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
590 dev = scsi_transport_device_data(sdev);
591 memset(dev, 0, sizeof(*dev));
594 * We start out life using untagged
595 * transactions of which we allow one.
600 * Set maxtags to 0. This will be changed if we
601 * later determine that we are dealing with
602 * a tagged queuing capable device.
606 spi_period(starget) = 0;
612 ahc_linux_slave_configure(struct scsi_device *sdev)
614 struct ahc_softc *ahc;
616 ahc = *((struct ahc_softc **)sdev->host->hostdata);
619 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
621 ahc_linux_device_queue_depth(sdev);
623 /* Initial Domain Validation */
624 if (!spi_initial_dv(sdev->sdev_target))
630 #if defined(__i386__)
632 * Return the disk geometry for the given SCSI device.
635 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
636 sector_t capacity, int geom[])
644 struct ahc_softc *ahc;
647 ahc = *((struct ahc_softc **)sdev->host->hostdata);
648 channel = sdev_channel(sdev);
650 bh = scsi_bios_ptable(bdev);
652 ret = scsi_partsize(bh, capacity,
653 &geom[2], &geom[0], &geom[1]);
660 cylinders = aic_sector_div(capacity, heads, sectors);
662 if (aic7xxx_extended != 0)
664 else if (channel == 0)
665 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
667 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
668 if (extended && cylinders >= 1024) {
671 cylinders = aic_sector_div(capacity, heads, sectors);
681 * Abort the current SCSI command(s).
684 ahc_linux_abort(struct scsi_cmnd *cmd)
688 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
690 printf("aic7xxx_abort returns 0x%x\n", error);
695 * Attempt to send a target reset message to the device that timed out.
698 ahc_linux_dev_reset(struct scsi_cmnd *cmd)
702 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
704 printf("aic7xxx_dev_reset returns 0x%x\n", error);
709 * Reset the SCSI bus.
712 ahc_linux_bus_reset(struct scsi_cmnd *cmd)
714 struct ahc_softc *ahc;
718 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
720 ahc_lock(ahc, &flags);
721 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
722 /*initiate reset*/TRUE);
723 ahc_unlock(ahc, &flags);
726 printf("%s: SCSI bus reset delivered. "
727 "%d SCBs aborted.\n", ahc_name(ahc), found);
732 struct scsi_host_template aic7xxx_driver_template = {
733 .module = THIS_MODULE,
735 .proc_name = "aic7xxx",
736 .proc_info = ahc_linux_proc_info,
737 .info = ahc_linux_info,
738 .queuecommand = ahc_linux_queue,
739 .eh_abort_handler = ahc_linux_abort,
740 .eh_device_reset_handler = ahc_linux_dev_reset,
741 .eh_bus_reset_handler = ahc_linux_bus_reset,
742 #if defined(__i386__)
743 .bios_param = ahc_linux_biosparam,
745 .can_queue = AHC_MAX_QUEUE,
749 .use_clustering = ENABLE_CLUSTERING,
750 .use_sg_chaining = ENABLE_SG_CHAINING,
751 .slave_alloc = ahc_linux_slave_alloc,
752 .slave_configure = ahc_linux_slave_configure,
753 .target_alloc = ahc_linux_target_alloc,
754 .target_destroy = ahc_linux_target_destroy,
757 /**************************** Tasklet Handler *********************************/
759 /******************************** Macros **************************************/
760 #define BUILD_SCSIID(ahc, cmd) \
761 ((((cmd)->device->id << TID_SHIFT) & TID) \
762 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
763 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
765 /******************************** Bus DMA *************************************/
767 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
768 bus_size_t alignment, bus_size_t boundary,
769 dma_addr_t lowaddr, dma_addr_t highaddr,
770 bus_dma_filter_t *filter, void *filterarg,
771 bus_size_t maxsize, int nsegments,
772 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
776 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
781 * Linux is very simplistic about DMA memory. For now don't
782 * maintain all specification information. Once Linux supplies
783 * better facilities for doing these operations, or the
784 * needs of this particular driver change, we might need to do
787 dmat->alignment = alignment;
788 dmat->boundary = boundary;
789 dmat->maxsize = maxsize;
795 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
797 free(dmat, M_DEVBUF);
801 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
802 int flags, bus_dmamap_t *mapp)
804 *vaddr = pci_alloc_consistent(ahc->dev_softc,
805 dmat->maxsize, mapp);
812 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
813 void* vaddr, bus_dmamap_t map)
815 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
820 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
821 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
822 void *cb_arg, int flags)
825 * Assume for now that this will only be used during
826 * initialization and not for per-transaction buffer mapping.
828 bus_dma_segment_t stack_sg;
830 stack_sg.ds_addr = map;
831 stack_sg.ds_len = dmat->maxsize;
832 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
837 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
842 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
849 ahc_linux_setup_tag_info_global(char *p)
853 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
854 printf("Setting Global Tags= %d\n", tags);
856 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
857 for (j = 0; j < AHC_NUM_TARGETS; j++) {
858 aic7xxx_tag_info[i].tag_commands[j] = tags;
864 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
867 if ((instance >= 0) && (targ >= 0)
868 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
869 && (targ < AHC_NUM_TARGETS)) {
870 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
872 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
877 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
878 void (*callback)(u_long, int, int, int32_t),
887 char tok_list[] = {'.', ',', '{', '}', '\0'};
889 /* All options use a ':' name/arg separator */
897 * Restore separator that may be in
898 * the middle of our option argument.
900 tok_end = strchr(opt_arg, '\0');
906 if (instance == -1) {
913 printf("Malformed Option %s\n",
923 else if (instance != -1)
933 else if (instance >= 0)
942 for (i = 0; tok_list[i]; i++) {
943 tok_end2 = strchr(opt_arg, tok_list[i]);
944 if ((tok_end2) && (tok_end2 < tok_end))
947 callback(callback_arg, instance, targ,
948 simple_strtol(opt_arg, NULL, 0));
957 * Handle Linux boot parameters. This routine allows for assigning a value
958 * to a parameter with a ':' between the parameter and the value.
959 * ie. aic7xxx=stpwlev:1,extended
962 aic7xxx_setup(char *s)
972 { "extended", &aic7xxx_extended },
973 { "no_reset", &aic7xxx_no_reset },
974 { "verbose", &aic7xxx_verbose },
975 { "allow_memio", &aic7xxx_allow_memio},
977 { "debug", &ahc_debug },
979 { "periodic_otag", &aic7xxx_periodic_otag },
980 { "pci_parity", &aic7xxx_pci_parity },
981 { "seltime", &aic7xxx_seltime },
982 { "tag_info", NULL },
983 { "global_tag_depth", NULL },
987 end = strchr(s, '\0');
990 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
991 * will never be 0 in this case.
995 while ((p = strsep(&s, ",.")) != NULL) {
998 for (i = 0; i < ARRAY_SIZE(options); i++) {
1000 n = strlen(options[i].name);
1001 if (strncmp(options[i].name, p, n) == 0)
1004 if (i == ARRAY_SIZE(options))
1007 if (strncmp(p, "global_tag_depth", n) == 0) {
1008 ahc_linux_setup_tag_info_global(p + n);
1009 } else if (strncmp(p, "tag_info", n) == 0) {
1010 s = ahc_parse_brace_option("tag_info", p + n, end,
1011 2, ahc_linux_setup_tag_info, 0);
1012 } else if (p[n] == ':') {
1013 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1014 } else if (strncmp(p, "verbose", n) == 0) {
1015 *(options[i].flag) = 1;
1017 *(options[i].flag) ^= 0xFFFFFFFF;
1023 __setup("aic7xxx=", aic7xxx_setup);
1025 uint32_t aic7xxx_verbose;
1028 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1031 struct Scsi_Host *host;
1036 template->name = ahc->description;
1037 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1041 *((struct ahc_softc **)host->hostdata) = ahc;
1042 ahc->platform_data->host = host;
1043 host->can_queue = AHC_MAX_QUEUE;
1044 host->cmd_per_lun = 2;
1045 /* XXX No way to communicate the ID for multiple channels */
1046 host->this_id = ahc->our_id;
1047 host->irq = ahc->platform_data->irq;
1048 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1049 host->max_lun = AHC_NUM_LUNS;
1050 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1051 host->sg_tablesize = AHC_NSEG;
1053 ahc_set_unit(ahc, ahc_linux_unit++);
1054 ahc_unlock(ahc, &s);
1055 sprintf(buf, "scsi%d", host->host_no);
1056 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1057 if (new_name != NULL) {
1058 strcpy(new_name, buf);
1059 ahc_set_name(ahc, new_name);
1061 host->unique_id = ahc->unit;
1062 ahc_linux_initialize_scsi_bus(ahc);
1063 ahc_intr_enable(ahc, TRUE);
1065 host->transportt = ahc_linux_transport_template;
1067 retval = scsi_add_host(host,
1068 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1070 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1071 scsi_host_put(host);
1075 scsi_scan_host(host);
1080 * Place the SCSI bus into a known state by either resetting it,
1081 * or forcing transfer negotiations on the next command to any
1085 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1096 if (aic7xxx_no_reset != 0)
1097 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1099 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1100 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1102 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1104 if ((ahc->features & AHC_TWIN) != 0) {
1106 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1107 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1116 * Force negotiation to async for all targets that
1117 * will not see an initial bus reset.
1119 for (; i < numtarg; i++) {
1120 struct ahc_devinfo devinfo;
1121 struct ahc_initiator_tinfo *tinfo;
1122 struct ahc_tmode_tstate *tstate;
1128 our_id = ahc->our_id;
1130 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1132 our_id = ahc->our_id_b;
1135 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1136 target_id, &tstate);
1137 ahc_compile_devinfo(&devinfo, our_id, target_id,
1138 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1139 ahc_update_neg_request(ahc, &devinfo, tstate,
1140 tinfo, AHC_NEG_ALWAYS);
1142 ahc_unlock(ahc, &s);
1143 /* Give the bus some time to recover */
1144 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1145 ahc_linux_freeze_simq(ahc);
1146 msleep(AIC7XXX_RESET_DELAY);
1147 ahc_linux_release_simq(ahc);
1152 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1155 ahc->platform_data =
1156 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1157 if (ahc->platform_data == NULL)
1159 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1160 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1162 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1163 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1164 if (aic7xxx_pci_parity == 0)
1165 ahc->flags |= AHC_DISABLE_PCI_PERR;
1171 ahc_platform_free(struct ahc_softc *ahc)
1173 struct scsi_target *starget;
1176 if (ahc->platform_data != NULL) {
1177 /* destroy all of the device and target objects */
1178 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1179 starget = ahc->platform_data->starget[i];
1180 if (starget != NULL) {
1181 ahc->platform_data->starget[i] = NULL;
1185 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1186 free_irq(ahc->platform_data->irq, ahc);
1187 if (ahc->tag == BUS_SPACE_PIO
1188 && ahc->bsh.ioport != 0)
1189 release_region(ahc->bsh.ioport, 256);
1190 if (ahc->tag == BUS_SPACE_MEMIO
1191 && ahc->bsh.maddr != NULL) {
1192 iounmap(ahc->bsh.maddr);
1193 release_mem_region(ahc->platform_data->mem_busaddr,
1197 if (ahc->platform_data->host)
1198 scsi_host_put(ahc->platform_data->host);
1200 free(ahc->platform_data, M_DEVBUF);
1205 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1207 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1208 SCB_GET_CHANNEL(ahc, scb),
1209 SCB_GET_LUN(scb), SCB_LIST_NULL,
1210 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1214 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1215 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1217 struct ahc_linux_device *dev;
1223 dev = scsi_transport_device_data(sdev);
1225 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1228 case AHC_QUEUE_NONE:
1231 case AHC_QUEUE_BASIC:
1232 now_queuing = AHC_DEV_Q_BASIC;
1234 case AHC_QUEUE_TAGGED:
1235 now_queuing = AHC_DEV_Q_TAGGED;
1238 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1239 && (was_queuing != now_queuing)
1240 && (dev->active != 0)) {
1241 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1245 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1249 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1252 * Start out agressively and allow our
1253 * dynamic queue depth algorithm to take
1256 dev->maxtags = usertags;
1257 dev->openings = dev->maxtags - dev->active;
1259 if (dev->maxtags == 0) {
1261 * Queueing is disabled by the user.
1264 } else if (alg == AHC_QUEUE_TAGGED) {
1265 dev->flags |= AHC_DEV_Q_TAGGED;
1266 if (aic7xxx_periodic_otag != 0)
1267 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1269 dev->flags |= AHC_DEV_Q_BASIC;
1271 /* We can only have one opening. */
1273 dev->openings = 1 - dev->active;
1275 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1276 case AHC_DEV_Q_BASIC:
1277 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1278 scsi_activate_tcq(sdev, dev->openings + dev->active);
1280 case AHC_DEV_Q_TAGGED:
1281 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
1282 scsi_activate_tcq(sdev, dev->openings + dev->active);
1286 * We allow the OS to queue 2 untagged transactions to
1287 * us at any time even though we can only execute them
1288 * serially on the controller/device. This should
1289 * remove some latency.
1291 scsi_deactivate_tcq(sdev, 2);
1297 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1298 int lun, u_int tag, role_t role, uint32_t status)
1304 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1306 static int warned_user;
1310 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1311 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
1312 if (warned_user == 0) {
1315 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1316 "aic7xxx: for installed controllers. Using defaults\n"
1317 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1318 "aic7xxx: the aic7xxx_osm..c source file.\n");
1321 tags = AHC_MAX_QUEUE;
1323 adapter_tag_info_t *tag_info;
1325 tag_info = &aic7xxx_tag_info[ahc->unit];
1326 tags = tag_info->tag_commands[devinfo->target_offset];
1327 if (tags > AHC_MAX_QUEUE)
1328 tags = AHC_MAX_QUEUE;
1335 * Determines the queue depth for a given device.
1338 ahc_linux_device_queue_depth(struct scsi_device *sdev)
1340 struct ahc_devinfo devinfo;
1342 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1344 ahc_compile_devinfo(&devinfo,
1345 sdev->sdev_target->channel == 0
1346 ? ahc->our_id : ahc->our_id_b,
1347 sdev->sdev_target->id, sdev->lun,
1348 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1350 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1351 if (tags != 0 && sdev->tagged_supported != 0) {
1353 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1354 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1355 devinfo.lun, AC_TRANSFER_NEG);
1356 ahc_print_devinfo(ahc, &devinfo);
1357 printf("Tagged Queuing enabled. Depth %d\n", tags);
1359 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1360 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1361 devinfo.lun, AC_TRANSFER_NEG);
1366 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1367 struct scsi_cmnd *cmd)
1370 struct hardware_scb *hscb;
1371 struct ahc_initiator_tinfo *tinfo;
1372 struct ahc_tmode_tstate *tstate;
1374 struct scb_tailq *untagged_q = NULL;
1378 * Schedule us to run later. The only reason we are not
1379 * running is because the whole controller Q is frozen.
1381 if (ahc->platform_data->qfrozen != 0)
1382 return SCSI_MLQUEUE_HOST_BUSY;
1385 * We only allow one untagged transaction
1386 * per target in the initiator role unless
1387 * we are storing a full busy target *lun*
1388 * table in SCB space.
1390 if (!blk_rq_tagged(cmd->request)
1391 && (ahc->features & AHC_SCB_BTT) == 0) {
1394 target_offset = cmd->device->id + cmd->device->channel * 8;
1395 untagged_q = &(ahc->untagged_queues[target_offset]);
1396 if (!TAILQ_EMPTY(untagged_q))
1397 /* if we're already executing an untagged command
1398 * we're busy to another */
1399 return SCSI_MLQUEUE_DEVICE_BUSY;
1403 * Get an scb to use.
1405 scb = ahc_get_scb(ahc);
1407 return SCSI_MLQUEUE_HOST_BUSY;
1410 scb->platform_data->dev = dev;
1412 cmd->host_scribble = (char *)scb;
1415 * Fill out basics of the HSCB.
1418 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1419 hscb->lun = cmd->device->lun;
1420 mask = SCB_GET_TARGET_MASK(ahc, scb);
1421 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1422 SCB_GET_OUR_ID(scb),
1423 SCB_GET_TARGET(ahc, scb), &tstate);
1424 hscb->scsirate = tinfo->scsirate;
1425 hscb->scsioffset = tinfo->curr.offset;
1426 if ((tstate->ultraenb & mask) != 0)
1427 hscb->control |= ULTRAENB;
1429 if ((ahc->user_discenable & mask) != 0)
1430 hscb->control |= DISCENB;
1432 if ((tstate->auto_negotiate & mask) != 0) {
1433 scb->flags |= SCB_AUTO_NEGOTIATE;
1434 scb->hscb->control |= MK_MESSAGE;
1437 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1439 uint8_t tag_msgs[2];
1441 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1442 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1443 hscb->control |= tag_msgs[0];
1444 if (tag_msgs[0] == MSG_ORDERED_TASK)
1445 dev->commands_since_idle_or_otag = 0;
1446 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1447 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1448 hscb->control |= MSG_ORDERED_TASK;
1449 dev->commands_since_idle_or_otag = 0;
1451 hscb->control |= MSG_SIMPLE_TASK;
1455 hscb->cdb_len = cmd->cmd_len;
1456 if (hscb->cdb_len <= 12) {
1457 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1459 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1460 scb->flags |= SCB_CDB32_PTR;
1463 scb->platform_data->xfer_len = 0;
1464 ahc_set_residual(scb, 0);
1465 ahc_set_sense_residual(scb, 0);
1468 nseg = scsi_dma_map(cmd);
1471 struct ahc_dma_seg *sg;
1472 struct scatterlist *cur_seg;
1475 /* Copy the segments into the SG list. */
1478 * The sg_count may be larger than nseg if
1479 * a transfer crosses a 32bit page.
1481 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1486 addr = sg_dma_address(cur_seg);
1487 len = sg_dma_len(cur_seg);
1488 consumed = ahc_linux_map_seg(ahc, scb,
1491 scb->sg_count += consumed;
1494 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1497 * Reset the sg list pointer.
1500 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1503 * Copy the first SG into the "current"
1504 * data pointer area.
1506 scb->hscb->dataptr = scb->sg_list->addr;
1507 scb->hscb->datacnt = scb->sg_list->len;
1509 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1510 scb->hscb->dataptr = 0;
1511 scb->hscb->datacnt = 0;
1515 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1518 dev->commands_issued++;
1519 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1520 dev->commands_since_idle_or_otag++;
1522 scb->flags |= SCB_ACTIVE;
1524 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1525 scb->flags |= SCB_UNTAGGEDQ;
1527 ahc_queue_scb(ahc, scb);
1532 * SCSI controller interrupt handler.
1535 ahc_linux_isr(int irq, void *dev_id)
1537 struct ahc_softc *ahc;
1541 ahc = (struct ahc_softc *) dev_id;
1542 ahc_lock(ahc, &flags);
1543 ours = ahc_intr(ahc);
1544 ahc_unlock(ahc, &flags);
1545 return IRQ_RETVAL(ours);
1549 ahc_platform_flushwork(struct ahc_softc *ahc)
1555 ahc_send_async(struct ahc_softc *ahc, char channel,
1556 u_int target, u_int lun, ac_code code)
1559 case AC_TRANSFER_NEG:
1562 struct scsi_target *starget;
1563 struct ahc_linux_target *targ;
1564 struct info_str info;
1565 struct ahc_initiator_tinfo *tinfo;
1566 struct ahc_tmode_tstate *tstate;
1568 unsigned int target_ppr_options;
1570 BUG_ON(target == CAM_TARGET_WILDCARD);
1573 info.length = sizeof(buf);
1576 tinfo = ahc_fetch_transinfo(ahc, channel,
1577 channel == 'A' ? ahc->our_id
1582 * Don't bother reporting results while
1583 * negotiations are still pending.
1585 if (tinfo->curr.period != tinfo->goal.period
1586 || tinfo->curr.width != tinfo->goal.width
1587 || tinfo->curr.offset != tinfo->goal.offset
1588 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1589 if (bootverbose == 0)
1593 * Don't bother reporting results that
1594 * are identical to those last reported.
1596 target_offset = target;
1599 starget = ahc->platform_data->starget[target_offset];
1600 if (starget == NULL)
1602 targ = scsi_transport_target_data(starget);
1604 target_ppr_options =
1605 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1606 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1607 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1609 if (tinfo->curr.period == spi_period(starget)
1610 && tinfo->curr.width == spi_width(starget)
1611 && tinfo->curr.offset == spi_offset(starget)
1612 && tinfo->curr.ppr_options == target_ppr_options)
1613 if (bootverbose == 0)
1616 spi_period(starget) = tinfo->curr.period;
1617 spi_width(starget) = tinfo->curr.width;
1618 spi_offset(starget) = tinfo->curr.offset;
1619 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1620 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1621 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1622 spi_display_xfer_agreement(starget);
1627 WARN_ON(lun != CAM_LUN_WILDCARD);
1628 scsi_report_device_reset(ahc->platform_data->host,
1629 channel - 'A', target);
1633 if (ahc->platform_data->host != NULL) {
1634 scsi_report_bus_reset(ahc->platform_data->host,
1639 panic("ahc_send_async: Unexpected async event");
1644 * Calls the higher level scsi done function and frees the scb.
1647 ahc_done(struct ahc_softc *ahc, struct scb *scb)
1649 struct scsi_cmnd *cmd;
1650 struct ahc_linux_device *dev;
1652 LIST_REMOVE(scb, pending_links);
1653 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1654 struct scb_tailq *untagged_q;
1657 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1658 untagged_q = &(ahc->untagged_queues[target_offset]);
1659 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1660 BUG_ON(!TAILQ_EMPTY(untagged_q));
1661 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1663 * Transactions aborted from the untagged queue may
1664 * not have been dispatched to the controller, so
1665 * only check the SCB_ACTIVE flag for tagged transactions.
1667 printf("SCB %d done'd twice\n", scb->hscb->tag);
1668 ahc_dump_card_state(ahc);
1669 panic("Stopping for safety");
1672 dev = scb->platform_data->dev;
1675 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1676 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1679 ahc_linux_unmap_scb(ahc, scb);
1682 * Guard against stale sense data.
1683 * The Linux mid-layer assumes that sense
1684 * was retrieved anytime the first byte of
1685 * the sense buffer looks "sane".
1687 cmd->sense_buffer[0] = 0;
1688 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1689 uint32_t amount_xferred;
1692 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1693 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1695 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1696 ahc_print_path(ahc, scb);
1697 printf("Set CAM_UNCOR_PARITY\n");
1700 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1701 #ifdef AHC_REPORT_UNDERFLOWS
1703 * This code is disabled by default as some
1704 * clients of the SCSI system do not properly
1705 * initialize the underflow parameter. This
1706 * results in spurious termination of commands
1707 * that complete as expected (e.g. underflow is
1708 * allowed as command can return variable amounts
1711 } else if (amount_xferred < scb->io_ctx->underflow) {
1714 ahc_print_path(ahc, scb);
1716 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1717 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1719 ahc_print_path(ahc, scb);
1720 printf("Saw underflow (%ld of %ld bytes). "
1721 "Treated as error\n",
1722 ahc_get_residual(scb),
1723 ahc_get_transfer_length(scb));
1724 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1727 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1729 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1730 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1733 if (dev->openings == 1
1734 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1735 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1736 dev->tag_success_count++;
1738 * Some devices deal with temporary internal resource
1739 * shortages by returning queue full. When the queue
1740 * full occurrs, we throttle back. Slowly try to get
1741 * back to our previous queue depth.
1743 if ((dev->openings + dev->active) < dev->maxtags
1744 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1745 dev->tag_success_count = 0;
1749 if (dev->active == 0)
1750 dev->commands_since_idle_or_otag = 0;
1752 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1753 printf("Recovery SCB completes\n");
1754 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1755 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1756 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1758 if (ahc->platform_data->eh_done)
1759 complete(ahc->platform_data->eh_done);
1762 ahc_free_scb(ahc, scb);
1763 ahc_linux_queue_cmd_complete(ahc, cmd);
1767 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
1768 struct scsi_device *sdev, struct scb *scb)
1770 struct ahc_devinfo devinfo;
1771 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1773 ahc_compile_devinfo(&devinfo,
1775 sdev->sdev_target->id, sdev->lun,
1776 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1780 * We don't currently trust the mid-layer to
1781 * properly deal with queue full or busy. So,
1782 * when one occurs, we tell the mid-layer to
1783 * unconditionally requeue the command to us
1784 * so that we can retry it ourselves. We also
1785 * implement our own throttling mechanism so
1786 * we don't clobber the device with too many
1789 switch (ahc_get_scsi_status(scb)) {
1792 case SCSI_STATUS_CHECK_COND:
1793 case SCSI_STATUS_CMD_TERMINATED:
1795 struct scsi_cmnd *cmd;
1798 * Copy sense information to the OS's cmd
1799 * structure if it is available.
1802 if (scb->flags & SCB_SENSE) {
1805 sense_size = min(sizeof(struct scsi_sense_data)
1806 - ahc_get_sense_residual(scb),
1807 (u_long)SCSI_SENSE_BUFFERSIZE);
1808 memcpy(cmd->sense_buffer,
1809 ahc_get_sense_buf(ahc, scb), sense_size);
1810 if (sense_size < SCSI_SENSE_BUFFERSIZE)
1811 memset(&cmd->sense_buffer[sense_size], 0,
1812 SCSI_SENSE_BUFFERSIZE - sense_size);
1813 cmd->result |= (DRIVER_SENSE << 24);
1815 if (ahc_debug & AHC_SHOW_SENSE) {
1818 printf("Copied %d bytes of sense data:",
1820 for (i = 0; i < sense_size; i++) {
1823 printf("0x%x ", cmd->sense_buffer[i]);
1831 case SCSI_STATUS_QUEUE_FULL:
1834 * By the time the core driver has returned this
1835 * command, all other commands that were queued
1836 * to us but not the device have been returned.
1837 * This ensures that dev->active is equal to
1838 * the number of commands actually queued to
1841 dev->tag_success_count = 0;
1842 if (dev->active != 0) {
1844 * Drop our opening count to the number
1845 * of commands currently outstanding.
1849 ahc_print_path(ahc, scb);
1850 printf("Dropping tag count to %d\n", dev->active);
1852 if (dev->active == dev->tags_on_last_queuefull) {
1854 dev->last_queuefull_same_count++;
1856 * If we repeatedly see a queue full
1857 * at the same queue depth, this
1858 * device has a fixed number of tag
1859 * slots. Lock in this tag depth
1860 * so we stop seeing queue fulls from
1863 if (dev->last_queuefull_same_count
1864 == AHC_LOCK_TAGS_COUNT) {
1865 dev->maxtags = dev->active;
1866 ahc_print_path(ahc, scb);
1867 printf("Locking max tag count at %d\n",
1871 dev->tags_on_last_queuefull = dev->active;
1872 dev->last_queuefull_same_count = 0;
1874 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1875 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
1876 ahc_platform_set_tags(ahc, sdev, &devinfo,
1877 (dev->flags & AHC_DEV_Q_BASIC)
1878 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1882 * Drop down to a single opening, and treat this
1883 * as if the target returned BUSY SCSI status.
1886 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
1887 ahc_platform_set_tags(ahc, sdev, &devinfo,
1888 (dev->flags & AHC_DEV_Q_BASIC)
1889 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1896 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1899 * Map CAM error codes into Linux Error codes. We
1900 * avoid the conversion so that the DV code has the
1901 * full error information available when making
1902 * state change decisions.
1907 switch (ahc_cmd_get_transaction_status(cmd)) {
1908 case CAM_REQ_INPROG:
1910 case CAM_SCSI_STATUS_ERROR:
1911 new_status = DID_OK;
1913 case CAM_REQ_ABORTED:
1914 new_status = DID_ABORT;
1917 new_status = DID_BUS_BUSY;
1919 case CAM_REQ_INVALID:
1920 case CAM_PATH_INVALID:
1921 new_status = DID_BAD_TARGET;
1923 case CAM_SEL_TIMEOUT:
1924 new_status = DID_NO_CONNECT;
1926 case CAM_SCSI_BUS_RESET:
1928 new_status = DID_RESET;
1930 case CAM_UNCOR_PARITY:
1931 new_status = DID_PARITY;
1933 case CAM_CMD_TIMEOUT:
1934 new_status = DID_TIME_OUT;
1937 case CAM_REQ_CMP_ERR:
1938 case CAM_AUTOSENSE_FAIL:
1940 case CAM_DATA_RUN_ERR:
1941 case CAM_UNEXP_BUSFREE:
1942 case CAM_SEQUENCE_FAIL:
1943 case CAM_CCB_LEN_ERR:
1944 case CAM_PROVIDE_FAIL:
1945 case CAM_REQ_TERMIO:
1946 case CAM_UNREC_HBA_ERROR:
1947 case CAM_REQ_TOO_BIG:
1948 new_status = DID_ERROR;
1950 case CAM_REQUEUE_REQ:
1951 new_status = DID_REQUEUE;
1954 /* We should never get here */
1955 new_status = DID_ERROR;
1959 ahc_cmd_set_transaction_status(cmd, new_status);
1962 cmd->scsi_done(cmd);
1966 ahc_linux_freeze_simq(struct ahc_softc *ahc)
1971 ahc->platform_data->qfrozen++;
1972 if (ahc->platform_data->qfrozen == 1) {
1973 scsi_block_requests(ahc->platform_data->host);
1975 /* XXX What about Twin channels? */
1976 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
1977 CAM_LUN_WILDCARD, SCB_LIST_NULL,
1978 ROLE_INITIATOR, CAM_REQUEUE_REQ);
1980 ahc_unlock(ahc, &s);
1984 ahc_linux_release_simq(struct ahc_softc *ahc)
1991 if (ahc->platform_data->qfrozen > 0)
1992 ahc->platform_data->qfrozen--;
1993 if (ahc->platform_data->qfrozen == 0)
1995 ahc_unlock(ahc, &s);
1997 * There is still a race here. The mid-layer
1998 * should keep its own freeze count and use
1999 * a bottom half handler to run the queues
2000 * so we can unblock with our own lock held.
2003 scsi_unblock_requests(ahc->platform_data->host);
2007 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2009 struct ahc_softc *ahc;
2010 struct ahc_linux_device *dev;
2011 struct scb *pending_scb;
2013 u_int active_scb_index;
2022 unsigned long flags;
2027 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2029 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
2030 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2033 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2034 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2037 ahc_lock(ahc, &flags);
2040 * First determine if we currently own this command.
2041 * Start by searching the device queue. If not found
2042 * there, check the pending_scb list. If not found
2043 * at all, and the system wanted us to just abort the
2044 * command, return success.
2046 dev = scsi_transport_device_data(cmd->device);
2050 * No target device for this command exists,
2051 * so we must not still own the command.
2053 printf("%s:%d:%d:%d: Is not an active device\n",
2054 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2060 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2061 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2062 cmd->device->channel + 'A',
2064 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2065 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2066 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2073 * See if we can find a matching cmd in the pending list.
2075 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2076 if (pending_scb->io_ctx == cmd)
2080 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2082 /* Any SCB for this device will do for a target reset */
2083 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2084 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2085 scmd_channel(cmd) + 'A',
2087 SCB_LIST_NULL, ROLE_INITIATOR))
2092 if (pending_scb == NULL) {
2093 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2097 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2099 * We can't queue two recovery actions using the same SCB
2106 * Ensure that the card doesn't do anything
2107 * behind our back and that we didn't "just" miss
2108 * an interrupt that would affect this cmd.
2110 was_paused = ahc_is_paused(ahc);
2111 ahc_pause_and_flushwork(ahc);
2114 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2115 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2119 printf("%s: At time of recovery, card was %spaused\n",
2120 ahc_name(ahc), was_paused ? "" : "not ");
2121 ahc_dump_card_state(ahc);
2123 disconnected = TRUE;
2124 if (flag == SCB_ABORT) {
2125 if (ahc_search_qinfifo(ahc, cmd->device->id,
2126 cmd->device->channel + 'A',
2128 pending_scb->hscb->tag,
2129 ROLE_INITIATOR, CAM_REQ_ABORTED,
2130 SEARCH_COMPLETE) > 0) {
2131 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2132 ahc_name(ahc), cmd->device->channel,
2133 cmd->device->id, cmd->device->lun);
2137 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2138 cmd->device->channel + 'A',
2139 cmd->device->lun, pending_scb->hscb->tag,
2140 ROLE_INITIATOR, /*status*/0,
2141 SEARCH_COUNT) > 0) {
2142 disconnected = FALSE;
2145 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2146 struct scb *bus_scb;
2148 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2149 if (bus_scb == pending_scb)
2150 disconnected = FALSE;
2151 else if (flag != SCB_ABORT
2152 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2153 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2154 disconnected = FALSE;
2158 * At this point, pending_scb is the scb associated with the
2159 * passed in command. That command is currently active on the
2160 * bus, is in the disconnected state, or we're hoping to find
2161 * a command for the same target active on the bus to abuse to
2162 * send a BDR. Queue the appropriate message based on which of
2163 * these states we are in.
2165 last_phase = ahc_inb(ahc, LASTPHASE);
2166 saved_scbptr = ahc_inb(ahc, SCBPTR);
2167 active_scb_index = ahc_inb(ahc, SCB_TAG);
2168 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2169 if (last_phase != P_BUSFREE
2170 && (pending_scb->hscb->tag == active_scb_index
2171 || (flag == SCB_DEVICE_RESET
2172 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
2175 * We're active on the bus, so assert ATN
2176 * and hope that the target responds.
2178 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2179 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2180 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2181 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2182 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2184 } else if (disconnected) {
2187 * Actually re-queue this SCB in an attempt
2188 * to select the device before it reconnects.
2189 * In either case (selection or reselection),
2190 * we will now issue the approprate message
2191 * to the timed-out device.
2193 * Set the MK_MESSAGE control bit indicating
2194 * that we desire to send a message. We
2195 * also set the disconnected flag since
2196 * in the paging case there is no guarantee
2197 * that our SCB control byte matches the
2198 * version on the card. We don't want the
2199 * sequencer to abort the command thinking
2200 * an unsolicited reselection occurred.
2202 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2203 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2206 * Remove any cached copy of this SCB in the
2207 * disconnected list in preparation for the
2208 * queuing of our abort SCB. We use the
2209 * same element in the SCB, SCB_NEXT, for
2210 * both the qinfifo and the disconnected list.
2212 ahc_search_disc_list(ahc, cmd->device->id,
2213 cmd->device->channel + 'A',
2214 cmd->device->lun, pending_scb->hscb->tag,
2215 /*stop_on_first*/TRUE,
2217 /*save_state*/FALSE);
2220 * In the non-paging case, the sequencer will
2221 * never re-reference the in-core SCB.
2222 * To make sure we are notified during
2223 * reslection, set the MK_MESSAGE flag in
2224 * the card's copy of the SCB.
2226 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2227 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2228 ahc_outb(ahc, SCB_CONTROL,
2229 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2233 * Clear out any entries in the QINFIFO first
2234 * so we are the next SCB for this target
2237 ahc_search_qinfifo(ahc, cmd->device->id,
2238 cmd->device->channel + 'A',
2239 cmd->device->lun, SCB_LIST_NULL,
2240 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2242 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2243 ahc_outb(ahc, SCBPTR, saved_scbptr);
2244 ahc_print_path(ahc, pending_scb);
2245 printf("Device is disconnected, re-queuing SCB\n");
2248 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2255 * Our assumption is that if we don't have the command, no
2256 * recovery action was required, so we return success. Again,
2257 * the semantics of the mid-layer recovery engine are not
2258 * well defined, so this may change in time.
2265 DECLARE_COMPLETION_ONSTACK(done);
2267 ahc->platform_data->eh_done = &done;
2268 ahc_unlock(ahc, &flags);
2270 printf("Recovery code sleeping\n");
2271 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2272 ahc_lock(ahc, &flags);
2273 ahc->platform_data->eh_done = NULL;
2274 ahc_unlock(ahc, &flags);
2276 printf("Timer Expired\n");
2279 printf("Recovery code awake\n");
2281 ahc_unlock(ahc, &flags);
2286 ahc_platform_dump_card_state(struct ahc_softc *ahc)
2290 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2292 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2293 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2294 struct ahc_devinfo devinfo;
2295 unsigned long flags;
2297 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2298 starget->channel + 'A', ROLE_INITIATOR);
2299 ahc_lock(ahc, &flags);
2300 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2301 ahc_unlock(ahc, &flags);
2304 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2306 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2307 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2308 struct ahc_tmode_tstate *tstate;
2309 struct ahc_initiator_tinfo *tinfo
2310 = ahc_fetch_transinfo(ahc,
2311 starget->channel + 'A',
2312 shost->this_id, starget->id, &tstate);
2313 struct ahc_devinfo devinfo;
2314 unsigned int ppr_options = tinfo->goal.ppr_options;
2315 unsigned long flags;
2316 unsigned long offset = tinfo->goal.offset;
2317 struct ahc_syncrate *syncrate;
2320 offset = MAX_OFFSET;
2323 period = 9; /* 12.5ns is our minimum */
2325 if (spi_max_width(starget))
2326 ppr_options |= MSG_EXT_PPR_DT_REQ;
2328 /* need wide for DT and need DT for 12.5 ns */
2332 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2333 starget->channel + 'A', ROLE_INITIATOR);
2335 /* all PPR requests apart from QAS require wide transfers */
2336 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2337 if (spi_width(starget) == 0)
2338 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2341 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2342 ahc_lock(ahc, &flags);
2343 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2344 ppr_options, AHC_TRANS_GOAL, FALSE);
2345 ahc_unlock(ahc, &flags);
2348 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2350 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2351 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2352 struct ahc_tmode_tstate *tstate;
2353 struct ahc_initiator_tinfo *tinfo
2354 = ahc_fetch_transinfo(ahc,
2355 starget->channel + 'A',
2356 shost->this_id, starget->id, &tstate);
2357 struct ahc_devinfo devinfo;
2358 unsigned int ppr_options = 0;
2359 unsigned int period = 0;
2360 unsigned long flags;
2361 struct ahc_syncrate *syncrate = NULL;
2363 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2364 starget->channel + 'A', ROLE_INITIATOR);
2366 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2367 period = tinfo->goal.period;
2368 ppr_options = tinfo->goal.ppr_options;
2370 ahc_lock(ahc, &flags);
2371 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2372 ppr_options, AHC_TRANS_GOAL, FALSE);
2373 ahc_unlock(ahc, &flags);
2376 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2378 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2379 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2380 struct ahc_tmode_tstate *tstate;
2381 struct ahc_initiator_tinfo *tinfo
2382 = ahc_fetch_transinfo(ahc,
2383 starget->channel + 'A',
2384 shost->this_id, starget->id, &tstate);
2385 struct ahc_devinfo devinfo;
2386 unsigned int ppr_options = tinfo->goal.ppr_options
2387 & ~MSG_EXT_PPR_DT_REQ;
2388 unsigned int period = tinfo->goal.period;
2389 unsigned int width = tinfo->goal.width;
2390 unsigned long flags;
2391 struct ahc_syncrate *syncrate;
2393 if (dt && spi_max_width(starget)) {
2394 ppr_options |= MSG_EXT_PPR_DT_REQ;
2396 ahc_linux_set_width(starget, 1);
2397 } else if (period == 9)
2398 period = 10; /* if resetting DT, period must be >= 25ns */
2400 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2401 starget->channel + 'A', ROLE_INITIATOR);
2402 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
2403 ahc_lock(ahc, &flags);
2404 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2405 ppr_options, AHC_TRANS_GOAL, FALSE);
2406 ahc_unlock(ahc, &flags);
2410 /* FIXME: This code claims to support IU and QAS. However, the actual
2411 * sequencer code and aic7xxx_core have no support for these parameters and
2412 * will get into a bad state if they're negotiated. Do not enable this
2413 * unless you know what you're doing */
2414 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2416 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2417 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2418 struct ahc_tmode_tstate *tstate;
2419 struct ahc_initiator_tinfo *tinfo
2420 = ahc_fetch_transinfo(ahc,
2421 starget->channel + 'A',
2422 shost->this_id, starget->id, &tstate);
2423 struct ahc_devinfo devinfo;
2424 unsigned int ppr_options = tinfo->goal.ppr_options
2425 & ~MSG_EXT_PPR_QAS_REQ;
2426 unsigned int period = tinfo->goal.period;
2427 unsigned long flags;
2428 struct ahc_syncrate *syncrate;
2431 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2433 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2434 starget->channel + 'A', ROLE_INITIATOR);
2435 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2436 ahc_lock(ahc, &flags);
2437 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2438 ppr_options, AHC_TRANS_GOAL, FALSE);
2439 ahc_unlock(ahc, &flags);
2442 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2444 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2445 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2446 struct ahc_tmode_tstate *tstate;
2447 struct ahc_initiator_tinfo *tinfo
2448 = ahc_fetch_transinfo(ahc,
2449 starget->channel + 'A',
2450 shost->this_id, starget->id, &tstate);
2451 struct ahc_devinfo devinfo;
2452 unsigned int ppr_options = tinfo->goal.ppr_options
2453 & ~MSG_EXT_PPR_IU_REQ;
2454 unsigned int period = tinfo->goal.period;
2455 unsigned long flags;
2456 struct ahc_syncrate *syncrate;
2459 ppr_options |= MSG_EXT_PPR_IU_REQ;
2461 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2462 starget->channel + 'A', ROLE_INITIATOR);
2463 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2464 ahc_lock(ahc, &flags);
2465 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2466 ppr_options, AHC_TRANS_GOAL, FALSE);
2467 ahc_unlock(ahc, &flags);
2471 static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2473 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
2474 unsigned long flags;
2477 if (!(ahc->features & AHC_ULTRA2)) {
2478 /* non-LVD chipset, may not have SBLKCTL reg */
2479 spi_signalling(shost) =
2480 ahc->features & AHC_HVD ?
2486 ahc_lock(ahc, &flags);
2488 mode = ahc_inb(ahc, SBLKCTL);
2490 ahc_unlock(ahc, &flags);
2493 spi_signalling(shost) = SPI_SIGNAL_LVD;
2494 else if (mode & ENAB20)
2495 spi_signalling(shost) = SPI_SIGNAL_SE;
2497 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2500 static struct spi_function_template ahc_linux_transport_functions = {
2501 .set_offset = ahc_linux_set_offset,
2503 .set_period = ahc_linux_set_period,
2505 .set_width = ahc_linux_set_width,
2507 .set_dt = ahc_linux_set_dt,
2510 .set_iu = ahc_linux_set_iu,
2512 .set_qas = ahc_linux_set_qas,
2515 .get_signalling = ahc_linux_get_signalling,
2521 ahc_linux_init(void)
2524 * If we've been passed any parameters, process them now.
2527 aic7xxx_setup(aic7xxx);
2529 ahc_linux_transport_template =
2530 spi_attach_transport(&ahc_linux_transport_functions);
2531 if (!ahc_linux_transport_template)
2534 scsi_transport_reserve_device(ahc_linux_transport_template,
2535 sizeof(struct ahc_linux_device));
2537 ahc_linux_pci_init();
2538 ahc_linux_eisa_init();
2543 ahc_linux_exit(void)
2545 ahc_linux_pci_exit();
2546 ahc_linux_eisa_exit();
2547 spi_release_transport(ahc_linux_transport_template);
2550 module_init(ahc_linux_init);
2551 module_exit(ahc_linux_exit);