3 * Adaptec AIC7xxx device driver for Linux.
5 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
7 * Copyright (c) 1994 John Aycock
8 * The University of Calgary Department of Computer Science.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; see the file COPYING. If not, write to
22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
25 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
26 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
27 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
28 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
29 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
30 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
31 * ANSI SCSI-2 specification (draft 10c), ...
33 * --------------------------------------------------------------------------
35 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
37 * Substantially modified to include support for wide and twin bus
38 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
39 * SCB paging, and other rework of the code.
41 * --------------------------------------------------------------------------
42 * Copyright (c) 1994-2000 Justin T. Gibbs.
43 * Copyright (c) 2000-2001 Adaptec Inc.
44 * All rights reserved.
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, this list of conditions, and the following disclaimer,
51 * without modification.
52 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
53 * substantially similar to the "NO WARRANTY" disclaimer below
54 * ("Disclaimer") and any redistribution must be conditioned upon
55 * including a substantially similar Disclaimer requirement for further
56 * binary redistribution.
57 * 3. Neither the names of the above-listed copyright holders nor the names
58 * of any contributors may be used to endorse or promote products derived
59 * from this software without specific prior written permission.
61 * Alternatively, this software may be distributed under the terms of the
62 * GNU General Public License ("GPL") version 2 as published by the Free
63 * Software Foundation.
66 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
67 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
68 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
69 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
70 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
71 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
72 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
73 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
74 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
75 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
76 * POSSIBILITY OF SUCH DAMAGES.
78 *---------------------------------------------------------------------------
80 * Thanks also go to (in alphabetical order) the following:
82 * Rory Bolt - Sequencer bug fixes
83 * Jay Estabrook - Initial DEC Alpha support
84 * Doug Ledford - Much needed abort/reset bug fixes
85 * Kai Makisara - DMAing of SCBs
87 * A Boot time option was also added for not resetting the scsi bus.
89 * Form: aic7xxx=extended
93 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
95 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
99 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
101 * Copyright (c) 1997-1999 Doug Ledford
103 * These changes are released under the same licensing terms as the FreeBSD
104 * driver written by Justin Gibbs. Please see his Copyright notice above
105 * for the exact terms and conditions covering my changes as well as the
106 * warranty statement.
108 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
109 * but are not limited to:
111 * 1: Import of the latest FreeBSD sequencer code for this driver
112 * 2: Modification of kernel code to accommodate different sequencer semantics
113 * 3: Extensive changes throughout kernel portion of driver to improve
114 * abort/reset processing and error hanndling
115 * 4: Other work contributed by various people on the Internet
116 * 5: Changes to printk information and verbosity selection code
117 * 6: General reliability related changes, especially in IRQ management
118 * 7: Modifications to the default probe/attach order for supported cards
119 * 8: SMP friendliness has been improved
123 #include "aic7xxx_osm.h"
124 #include "aic7xxx_inline.h"
125 #include <scsi/scsicam.h>
127 static struct scsi_transport_template *ahc_linux_transport_template = NULL;
129 #include <linux/init.h> /* __setup */
130 #include <linux/mm.h> /* For fetching system memory size */
131 #include <linux/blkdev.h> /* For block_size() */
132 #include <linux/delay.h> /* For ssleep/msleep */
133 #include <linux/slab.h>
137 * Set this to the delay in seconds after SCSI bus reset.
138 * Note, we honor this only for the initial bus reset.
139 * The scsi error recovery code performs its own bus settle
140 * delay handling for error recovery actions.
142 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
143 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
145 #define AIC7XXX_RESET_DELAY 5000
149 * To change the default number of tagged transactions allowed per-device,
150 * add a line to the lilo.conf file like:
151 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
152 * which will result in the first four devices on the first two
153 * controllers being set to a tagged queue depth of 32.
155 * The tag_commands is an array of 16 to allow for wide and twin adapters.
156 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
160 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
161 } adapter_tag_info_t;
164 * Modify this as you see fit for your system.
166 * 0 tagged queuing disabled
167 * 1 <= n <= 253 n == max tags ever dispatched.
169 * The driver will throttle the number of commands dispatched to a
170 * device if it returns queue full. For devices with a fixed maximum
171 * queue depth, the driver will eventually determine this depth and
172 * lock it in (a console message is printed to indicate that a lock
173 * has occurred). On some devices, queue full is returned for a temporary
174 * resource shortage. These devices will return queue full at varying
175 * depths. The driver will throttle back when the queue fulls occur and
176 * attempt to slowly increase the depth over time as the device recovers
177 * from the resource shortage.
179 * In this example, the first line will disable tagged queueing for all
180 * the devices on the first probed aic7xxx adapter.
182 * The second line enables tagged queueing with 4 commands/LUN for IDs
183 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
184 * driver to attempt to use up to 64 tags for ID 1.
186 * The third line is the same as the first line.
188 * The fourth line disables tagged queueing for devices 0 and 3. It
189 * enables tagged queueing for the other IDs, with 16 commands/LUN
190 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
191 * IDs 2, 5-7, and 9-15.
195 * NOTE: The below structure is for reference only, the actual structure
196 * to modify in order to change things is just below this comment block.
197 adapter_tag_info_t aic7xxx_tag_info[] =
199 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
200 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
201 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
202 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
206 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
207 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
209 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
212 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
213 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
214 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
215 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
216 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
217 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
218 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
219 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
220 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
224 * By default, use the number of commands specified by
225 * the users kernel configuration.
227 static adapter_tag_info_t aic7xxx_tag_info[] =
229 {AIC7XXX_CONFIGED_TAG_COMMANDS},
230 {AIC7XXX_CONFIGED_TAG_COMMANDS},
231 {AIC7XXX_CONFIGED_TAG_COMMANDS},
232 {AIC7XXX_CONFIGED_TAG_COMMANDS},
233 {AIC7XXX_CONFIGED_TAG_COMMANDS},
234 {AIC7XXX_CONFIGED_TAG_COMMANDS},
235 {AIC7XXX_CONFIGED_TAG_COMMANDS},
236 {AIC7XXX_CONFIGED_TAG_COMMANDS},
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}
248 * There should be a specific return value for this in scsi.h, but
249 * it seems that most drivers ignore it.
251 #define DID_UNDERFLOW DID_ERROR
254 ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
256 printk("(scsi%d:%c:%d:%d): ",
257 ahc->platform_data->host->host_no,
258 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
259 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
260 scb != NULL ? SCB_GET_LUN(scb) : -1);
264 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
265 * cards in the system. This should be fixed. Exceptions to this
266 * rule are noted in the comments.
270 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
271 * has no effect on any later resets that might occur due to things like
274 static uint32_t aic7xxx_no_reset;
277 * Should we force EXTENDED translation on a controller.
278 * 0 == Use whatever is in the SEEPROM or default to off
279 * 1 == Use whatever is in the SEEPROM or default to on
281 static uint32_t aic7xxx_extended;
284 * PCI bus parity checking of the Adaptec controllers. This is somewhat
285 * dubious at best. To my knowledge, this option has never actually
286 * solved a PCI parity problem, but on certain machines with broken PCI
287 * chipset configurations where stray PCI transactions with bad parity are
288 * the norm rather than the exception, the error messages can be overwhelming.
289 * It's included in the driver for completeness.
290 * 0 = Shut off PCI parity check
291 * non-0 = reverse polarity pci parity checking
293 static uint32_t aic7xxx_pci_parity = ~0;
296 * There are lots of broken chipsets in the world. Some of them will
297 * violate the PCI spec when we issue byte sized memory writes to our
298 * controller. I/O mapped register access, if allowed by the given
299 * platform, will work in almost all cases.
301 uint32_t aic7xxx_allow_memio = ~0;
304 * So that we can set how long each device is given as a selection timeout.
305 * The table of values goes like this:
310 * We default to 256ms because some older devices need a longer time
311 * to respond to initial selection.
313 static uint32_t aic7xxx_seltime;
316 * Certain devices do not perform any aging on commands. Should the
317 * device be saturated by commands in one portion of the disk, it is
318 * possible for transactions on far away sectors to never be serviced.
319 * To handle these devices, we can periodically send an ordered tag to
320 * force all outstanding transactions to be serviced prior to a new
323 static uint32_t aic7xxx_periodic_otag;
326 * Module information and settable options.
328 static char *aic7xxx = NULL;
330 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
331 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
332 MODULE_LICENSE("Dual BSD/GPL");
333 MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
334 module_param(aic7xxx, charp, 0444);
335 MODULE_PARM_DESC(aic7xxx,
336 "period-delimited options string:\n"
337 " verbose Enable verbose/diagnostic logging\n"
338 " allow_memio Allow device registers to be memory mapped\n"
339 " debug Bitmask of debug values to enable\n"
340 " no_probe Toggle EISA/VLB controller probing\n"
341 " probe_eisa_vl Toggle EISA/VLB controller probing\n"
342 " no_reset Suppress initial bus resets\n"
343 " extended Enable extended geometry on all controllers\n"
344 " periodic_otag Send an ordered tagged transaction\n"
345 " periodically to prevent tag starvation.\n"
346 " This may be required by some older disk\n"
347 " drives or RAID arrays.\n"
348 " tag_info:<tag_str> Set per-target tag depth\n"
349 " global_tag_depth:<int> Global tag depth for every target\n"
351 " seltime:<int> Selection Timeout\n"
352 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
354 " Sample modprobe configuration file:\n"
355 " # Toggle EISA/VLB probing\n"
356 " # Set tag depth on Controller 1/Target 1 to 10 tags\n"
357 " # Shorten the selection timeout to 128ms\n"
359 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
362 static void ahc_linux_handle_scsi_status(struct ahc_softc *,
363 struct scsi_device *,
365 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
366 struct scsi_cmnd *cmd);
367 static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
368 static void ahc_linux_release_simq(struct ahc_softc *ahc);
369 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
370 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
371 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
372 struct ahc_devinfo *devinfo);
373 static void ahc_linux_device_queue_depth(struct scsi_device *);
374 static int ahc_linux_run_command(struct ahc_softc*,
375 struct ahc_linux_device *,
377 static void ahc_linux_setup_tag_info_global(char *p);
378 static int aic7xxx_setup(char *s);
380 static int ahc_linux_unit;
383 /************************** OS Utility Wrappers *******************************/
388 * udelay on Linux can have problems for
389 * multi-millisecond waits. Wait at most
398 /***************************** Low Level I/O **********************************/
400 ahc_inb(struct ahc_softc * ahc, long port)
404 if (ahc->tag == BUS_SPACE_MEMIO) {
405 x = readb(ahc->bsh.maddr + port);
407 x = inb(ahc->bsh.ioport + port);
414 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
416 if (ahc->tag == BUS_SPACE_MEMIO) {
417 writeb(val, ahc->bsh.maddr + port);
419 outb(val, ahc->bsh.ioport + port);
425 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
430 * There is probably a more efficient way to do this on Linux
431 * but we don't use this for anything speed critical and this
434 for (i = 0; i < count; i++)
435 ahc_outb(ahc, port, *array++);
439 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
444 * There is probably a more efficient way to do this on Linux
445 * but we don't use this for anything speed critical and this
448 for (i = 0; i < count; i++)
449 *array++ = ahc_inb(ahc, port);
452 /********************************* Inlines ************************************/
453 static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
455 static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
456 struct ahc_dma_seg *sg,
457 dma_addr_t addr, bus_size_t len);
460 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
462 struct scsi_cmnd *cmd;
465 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
471 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
472 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
476 if ((scb->sg_count + 1) > AHC_NSEG)
477 panic("Too few segs for dma mapping. "
478 "Increase AHC_NSEG\n");
481 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
482 scb->platform_data->xfer_len += len;
484 if (sizeof(dma_addr_t) > 4
485 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
486 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
488 sg->len = ahc_htole32(len);
493 * Return a string describing the driver.
496 ahc_linux_info(struct Scsi_Host *host)
498 static char buffer[512];
501 struct ahc_softc *ahc;
504 ahc = *(struct ahc_softc **)host->hostdata;
505 memset(bp, 0, sizeof(buffer));
506 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n"
508 strcat(bp, ahc->description);
511 ahc_controller_info(ahc, ahc_info);
512 strcat(bp, ahc_info);
519 * Queue an SCB to the controller.
522 ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
524 struct ahc_softc *ahc;
525 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
526 int rtn = SCSI_MLQUEUE_HOST_BUSY;
529 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
531 ahc_lock(ahc, &flags);
532 if (ahc->platform_data->qfrozen == 0) {
533 cmd->scsi_done = scsi_done;
534 cmd->result = CAM_REQ_INPROG << 16;
535 rtn = ahc_linux_run_command(ahc, dev, cmd);
537 ahc_unlock(ahc, &flags);
542 static DEF_SCSI_QCMD(ahc_linux_queue)
544 static inline struct scsi_target **
545 ahc_linux_target_in_softc(struct scsi_target *starget)
547 struct ahc_softc *ahc =
548 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
549 unsigned int target_offset;
551 target_offset = starget->id;
552 if (starget->channel != 0)
555 return &ahc->platform_data->starget[target_offset];
559 ahc_linux_target_alloc(struct scsi_target *starget)
561 struct ahc_softc *ahc =
562 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
563 struct seeprom_config *sc = ahc->seep_config;
565 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
566 unsigned short scsirate;
567 struct ahc_devinfo devinfo;
568 char channel = starget->channel + 'A';
569 unsigned int our_id = ahc->our_id;
570 unsigned int target_offset;
572 target_offset = starget->id;
573 if (starget->channel != 0)
576 if (starget->channel)
577 our_id = ahc->our_id_b;
579 ahc_lock(ahc, &flags);
581 BUG_ON(*ahc_targp != NULL);
583 *ahc_targp = starget;
586 int maxsync = AHC_SYNCRATE_DT;
588 int flags = sc->device_flags[target_offset];
590 if (ahc->flags & AHC_NEWEEPROM_FMT) {
591 if (flags & CFSYNCHISULTRA)
593 } else if (flags & CFULTRAEN)
595 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
596 * change it to ultra=0, CFXFER = 0 */
597 if(ultra && (flags & CFXFER) == 0x04) {
602 if ((ahc->features & AHC_ULTRA2) != 0) {
603 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
605 scsirate = (flags & CFXFER) << 4;
606 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
609 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
610 if (!(flags & CFSYNCH))
611 spi_max_offset(starget) = 0;
612 spi_min_period(starget) =
613 ahc_find_period(ahc, scsirate, maxsync);
615 ahc_compile_devinfo(&devinfo, our_id, starget->id,
616 CAM_LUN_WILDCARD, channel,
618 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
619 AHC_TRANS_GOAL, /*paused*/FALSE);
620 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
621 AHC_TRANS_GOAL, /*paused*/FALSE);
622 ahc_unlock(ahc, &flags);
628 ahc_linux_target_destroy(struct scsi_target *starget)
630 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
636 ahc_linux_slave_alloc(struct scsi_device *sdev)
638 struct ahc_softc *ahc =
639 *((struct ahc_softc **)sdev->host->hostdata);
640 struct scsi_target *starget = sdev->sdev_target;
641 struct ahc_linux_device *dev;
644 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
646 dev = scsi_transport_device_data(sdev);
647 memset(dev, 0, sizeof(*dev));
650 * We start out life using untagged
651 * transactions of which we allow one.
656 * Set maxtags to 0. This will be changed if we
657 * later determine that we are dealing with
658 * a tagged queuing capable device.
662 spi_period(starget) = 0;
668 ahc_linux_slave_configure(struct scsi_device *sdev)
671 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
673 ahc_linux_device_queue_depth(sdev);
675 /* Initial Domain Validation */
676 if (!spi_initial_dv(sdev->sdev_target))
682 #if defined(__i386__)
684 * Return the disk geometry for the given SCSI device.
687 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
688 sector_t capacity, int geom[])
694 struct ahc_softc *ahc;
697 ahc = *((struct ahc_softc **)sdev->host->hostdata);
698 channel = sdev_channel(sdev);
700 if (scsi_partsize(bdev, capacity, geom))
705 cylinders = aic_sector_div(capacity, heads, sectors);
707 if (aic7xxx_extended != 0)
709 else if (channel == 0)
710 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
712 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
713 if (extended && cylinders >= 1024) {
716 cylinders = aic_sector_div(capacity, heads, sectors);
726 * Abort the current SCSI command(s).
729 ahc_linux_abort(struct scsi_cmnd *cmd)
733 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
734 if (error != SUCCESS)
735 printk("aic7xxx_abort returns 0x%x\n", error);
740 * Attempt to send a target reset message to the device that timed out.
743 ahc_linux_dev_reset(struct scsi_cmnd *cmd)
747 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
748 if (error != SUCCESS)
749 printk("aic7xxx_dev_reset returns 0x%x\n", error);
754 * Reset the SCSI bus.
757 ahc_linux_bus_reset(struct scsi_cmnd *cmd)
759 struct ahc_softc *ahc;
763 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
765 ahc_lock(ahc, &flags);
766 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
767 /*initiate reset*/TRUE);
768 ahc_unlock(ahc, &flags);
771 printk("%s: SCSI bus reset delivered. "
772 "%d SCBs aborted.\n", ahc_name(ahc), found);
777 struct scsi_host_template aic7xxx_driver_template = {
778 .module = THIS_MODULE,
780 .proc_name = "aic7xxx",
781 .show_info = ahc_linux_show_info,
782 .write_info = ahc_proc_write_seeprom,
783 .info = ahc_linux_info,
784 .queuecommand = ahc_linux_queue,
785 .eh_abort_handler = ahc_linux_abort,
786 .eh_device_reset_handler = ahc_linux_dev_reset,
787 .eh_bus_reset_handler = ahc_linux_bus_reset,
788 #if defined(__i386__)
789 .bios_param = ahc_linux_biosparam,
791 .can_queue = AHC_MAX_QUEUE,
795 .slave_alloc = ahc_linux_slave_alloc,
796 .slave_configure = ahc_linux_slave_configure,
797 .target_alloc = ahc_linux_target_alloc,
798 .target_destroy = ahc_linux_target_destroy,
801 /**************************** Tasklet Handler *********************************/
803 /******************************** Macros **************************************/
804 #define BUILD_SCSIID(ahc, cmd) \
805 ((((cmd)->device->id << TID_SHIFT) & TID) \
806 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
807 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
809 /******************************** Bus DMA *************************************/
811 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
812 bus_size_t alignment, bus_size_t boundary,
813 dma_addr_t lowaddr, dma_addr_t highaddr,
814 bus_dma_filter_t *filter, void *filterarg,
815 bus_size_t maxsize, int nsegments,
816 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
820 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
825 * Linux is very simplistic about DMA memory. For now don't
826 * maintain all specification information. Once Linux supplies
827 * better facilities for doing these operations, or the
828 * needs of this particular driver change, we might need to do
831 dmat->alignment = alignment;
832 dmat->boundary = boundary;
833 dmat->maxsize = maxsize;
839 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
845 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
846 int flags, bus_dmamap_t *mapp)
848 /* XXX: check if we really need the GFP_ATOMIC and unwind this mess! */
849 *vaddr = dma_alloc_coherent(ahc->dev, dmat->maxsize, mapp, GFP_ATOMIC);
856 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
857 void* vaddr, bus_dmamap_t map)
859 dma_free_coherent(ahc->dev, dmat->maxsize, vaddr, map);
863 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
864 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
865 void *cb_arg, int flags)
868 * Assume for now that this will only be used during
869 * initialization and not for per-transaction buffer mapping.
871 bus_dma_segment_t stack_sg;
873 stack_sg.ds_addr = map;
874 stack_sg.ds_len = dmat->maxsize;
875 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
880 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
885 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
892 ahc_linux_setup_tag_info_global(char *p)
896 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
897 printk("Setting Global Tags= %d\n", tags);
899 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
900 for (j = 0; j < AHC_NUM_TARGETS; j++) {
901 aic7xxx_tag_info[i].tag_commands[j] = tags;
907 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
910 if ((instance >= 0) && (targ >= 0)
911 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
912 && (targ < AHC_NUM_TARGETS)) {
913 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
915 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
920 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
921 void (*callback)(u_long, int, int, int32_t),
930 char tok_list[] = {'.', ',', '{', '}', '\0'};
932 /* All options use a ':' name/arg separator */
940 * Restore separator that may be in
941 * the middle of our option argument.
943 tok_end = strchr(opt_arg, '\0');
949 if (instance == -1) {
956 printk("Malformed Option %s\n",
966 else if (instance != -1)
976 else if (instance >= 0)
985 for (i = 0; tok_list[i]; i++) {
986 tok_end2 = strchr(opt_arg, tok_list[i]);
987 if ((tok_end2) && (tok_end2 < tok_end))
990 callback(callback_arg, instance, targ,
991 simple_strtol(opt_arg, NULL, 0));
1000 * Handle Linux boot parameters. This routine allows for assigning a value
1001 * to a parameter with a ':' between the parameter and the value.
1002 * ie. aic7xxx=stpwlev:1,extended
1005 aic7xxx_setup(char *s)
1011 static const struct {
1015 { "extended", &aic7xxx_extended },
1016 { "no_reset", &aic7xxx_no_reset },
1017 { "verbose", &aic7xxx_verbose },
1018 { "allow_memio", &aic7xxx_allow_memio},
1020 { "debug", &ahc_debug },
1022 { "periodic_otag", &aic7xxx_periodic_otag },
1023 { "pci_parity", &aic7xxx_pci_parity },
1024 { "seltime", &aic7xxx_seltime },
1025 { "tag_info", NULL },
1026 { "global_tag_depth", NULL },
1030 end = strchr(s, '\0');
1033 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1034 * will never be 0 in this case.
1038 while ((p = strsep(&s, ",.")) != NULL) {
1041 for (i = 0; i < ARRAY_SIZE(options); i++) {
1043 n = strlen(options[i].name);
1044 if (strncmp(options[i].name, p, n) == 0)
1047 if (i == ARRAY_SIZE(options))
1050 if (strncmp(p, "global_tag_depth", n) == 0) {
1051 ahc_linux_setup_tag_info_global(p + n);
1052 } else if (strncmp(p, "tag_info", n) == 0) {
1053 s = ahc_parse_brace_option("tag_info", p + n, end,
1054 2, ahc_linux_setup_tag_info, 0);
1055 } else if (p[n] == ':') {
1056 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1057 } else if (strncmp(p, "verbose", n) == 0) {
1058 *(options[i].flag) = 1;
1060 *(options[i].flag) ^= 0xFFFFFFFF;
1066 __setup("aic7xxx=", aic7xxx_setup);
1068 uint32_t aic7xxx_verbose;
1071 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1074 struct Scsi_Host *host;
1079 template->name = ahc->description;
1080 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1084 *((struct ahc_softc **)host->hostdata) = ahc;
1085 ahc->platform_data->host = host;
1086 host->can_queue = AHC_MAX_QUEUE;
1087 host->cmd_per_lun = 2;
1088 /* XXX No way to communicate the ID for multiple channels */
1089 host->this_id = ahc->our_id;
1090 host->irq = ahc->platform_data->irq;
1091 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1092 host->max_lun = AHC_NUM_LUNS;
1093 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1094 host->sg_tablesize = AHC_NSEG;
1096 ahc_set_unit(ahc, ahc_linux_unit++);
1097 ahc_unlock(ahc, &s);
1098 sprintf(buf, "scsi%d", host->host_no);
1099 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1100 if (new_name != NULL) {
1101 strcpy(new_name, buf);
1102 ahc_set_name(ahc, new_name);
1104 host->unique_id = ahc->unit;
1105 ahc_linux_initialize_scsi_bus(ahc);
1106 ahc_intr_enable(ahc, TRUE);
1108 host->transportt = ahc_linux_transport_template;
1110 retval = scsi_add_host(host, ahc->dev);
1112 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1113 scsi_host_put(host);
1117 scsi_scan_host(host);
1122 * Place the SCSI bus into a known state by either resetting it,
1123 * or forcing transfer negotiations on the next command to any
1127 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1138 if (aic7xxx_no_reset != 0)
1139 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1141 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1142 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1144 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1146 if ((ahc->features & AHC_TWIN) != 0) {
1148 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1149 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1158 * Force negotiation to async for all targets that
1159 * will not see an initial bus reset.
1161 for (; i < numtarg; i++) {
1162 struct ahc_devinfo devinfo;
1163 struct ahc_initiator_tinfo *tinfo;
1164 struct ahc_tmode_tstate *tstate;
1170 our_id = ahc->our_id;
1172 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1174 our_id = ahc->our_id_b;
1177 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1178 target_id, &tstate);
1179 ahc_compile_devinfo(&devinfo, our_id, target_id,
1180 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1181 ahc_update_neg_request(ahc, &devinfo, tstate,
1182 tinfo, AHC_NEG_ALWAYS);
1184 ahc_unlock(ahc, &s);
1185 /* Give the bus some time to recover */
1186 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1187 ahc_linux_freeze_simq(ahc);
1188 msleep(AIC7XXX_RESET_DELAY);
1189 ahc_linux_release_simq(ahc);
1194 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1197 ahc->platform_data =
1198 kzalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
1199 if (ahc->platform_data == NULL)
1201 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1203 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1204 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1205 if (aic7xxx_pci_parity == 0)
1206 ahc->flags |= AHC_DISABLE_PCI_PERR;
1212 ahc_platform_free(struct ahc_softc *ahc)
1214 struct scsi_target *starget;
1217 if (ahc->platform_data != NULL) {
1218 /* destroy all of the device and target objects */
1219 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1220 starget = ahc->platform_data->starget[i];
1221 if (starget != NULL) {
1222 ahc->platform_data->starget[i] = NULL;
1226 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1227 free_irq(ahc->platform_data->irq, ahc);
1228 if (ahc->tag == BUS_SPACE_PIO
1229 && ahc->bsh.ioport != 0)
1230 release_region(ahc->bsh.ioport, 256);
1231 if (ahc->tag == BUS_SPACE_MEMIO
1232 && ahc->bsh.maddr != NULL) {
1233 iounmap(ahc->bsh.maddr);
1234 release_mem_region(ahc->platform_data->mem_busaddr,
1238 if (ahc->platform_data->host)
1239 scsi_host_put(ahc->platform_data->host);
1241 kfree(ahc->platform_data);
1246 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1248 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1249 SCB_GET_CHANNEL(ahc, scb),
1250 SCB_GET_LUN(scb), SCB_LIST_NULL,
1251 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1255 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1256 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1258 struct ahc_linux_device *dev;
1264 dev = scsi_transport_device_data(sdev);
1266 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1269 case AHC_QUEUE_NONE:
1272 case AHC_QUEUE_BASIC:
1273 now_queuing = AHC_DEV_Q_BASIC;
1275 case AHC_QUEUE_TAGGED:
1276 now_queuing = AHC_DEV_Q_TAGGED;
1279 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1280 && (was_queuing != now_queuing)
1281 && (dev->active != 0)) {
1282 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1286 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1290 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1293 * Start out aggressively and allow our
1294 * dynamic queue depth algorithm to take
1297 dev->maxtags = usertags;
1298 dev->openings = dev->maxtags - dev->active;
1300 if (dev->maxtags == 0) {
1302 * Queueing is disabled by the user.
1305 } else if (alg == AHC_QUEUE_TAGGED) {
1306 dev->flags |= AHC_DEV_Q_TAGGED;
1307 if (aic7xxx_periodic_otag != 0)
1308 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1310 dev->flags |= AHC_DEV_Q_BASIC;
1312 /* We can only have one opening. */
1314 dev->openings = 1 - dev->active;
1316 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1317 case AHC_DEV_Q_BASIC:
1318 case AHC_DEV_Q_TAGGED:
1319 scsi_change_queue_depth(sdev,
1320 dev->openings + dev->active);
1324 * We allow the OS to queue 2 untagged transactions to
1325 * us at any time even though we can only execute them
1326 * serially on the controller/device. This should
1327 * remove some latency.
1329 scsi_change_queue_depth(sdev, 2);
1335 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1336 int lun, u_int tag, role_t role, uint32_t status)
1342 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1344 static int warned_user;
1348 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1349 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
1350 if (warned_user == 0) {
1353 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1354 "aic7xxx: for installed controllers. Using defaults\n"
1355 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1356 "aic7xxx: the aic7xxx_osm..c source file.\n");
1359 tags = AHC_MAX_QUEUE;
1361 adapter_tag_info_t *tag_info;
1363 tag_info = &aic7xxx_tag_info[ahc->unit];
1364 tags = tag_info->tag_commands[devinfo->target_offset];
1365 if (tags > AHC_MAX_QUEUE)
1366 tags = AHC_MAX_QUEUE;
1373 * Determines the queue depth for a given device.
1376 ahc_linux_device_queue_depth(struct scsi_device *sdev)
1378 struct ahc_devinfo devinfo;
1380 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1382 ahc_compile_devinfo(&devinfo,
1383 sdev->sdev_target->channel == 0
1384 ? ahc->our_id : ahc->our_id_b,
1385 sdev->sdev_target->id, sdev->lun,
1386 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1388 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1389 if (tags != 0 && sdev->tagged_supported != 0) {
1391 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1392 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1393 devinfo.lun, AC_TRANSFER_NEG);
1394 ahc_print_devinfo(ahc, &devinfo);
1395 printk("Tagged Queuing enabled. Depth %d\n", tags);
1397 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1398 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1399 devinfo.lun, AC_TRANSFER_NEG);
1404 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1405 struct scsi_cmnd *cmd)
1408 struct hardware_scb *hscb;
1409 struct ahc_initiator_tinfo *tinfo;
1410 struct ahc_tmode_tstate *tstate;
1412 struct scb_tailq *untagged_q = NULL;
1416 * Schedule us to run later. The only reason we are not
1417 * running is because the whole controller Q is frozen.
1419 if (ahc->platform_data->qfrozen != 0)
1420 return SCSI_MLQUEUE_HOST_BUSY;
1423 * We only allow one untagged transaction
1424 * per target in the initiator role unless
1425 * we are storing a full busy target *lun*
1426 * table in SCB space.
1428 if (!(cmd->flags & SCMD_TAGGED)
1429 && (ahc->features & AHC_SCB_BTT) == 0) {
1432 target_offset = cmd->device->id + cmd->device->channel * 8;
1433 untagged_q = &(ahc->untagged_queues[target_offset]);
1434 if (!TAILQ_EMPTY(untagged_q))
1435 /* if we're already executing an untagged command
1436 * we're busy to another */
1437 return SCSI_MLQUEUE_DEVICE_BUSY;
1440 nseg = scsi_dma_map(cmd);
1442 return SCSI_MLQUEUE_HOST_BUSY;
1445 * Get an scb to use.
1447 scb = ahc_get_scb(ahc);
1449 scsi_dma_unmap(cmd);
1450 return SCSI_MLQUEUE_HOST_BUSY;
1454 scb->platform_data->dev = dev;
1456 cmd->host_scribble = (char *)scb;
1459 * Fill out basics of the HSCB.
1462 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1463 hscb->lun = cmd->device->lun;
1464 mask = SCB_GET_TARGET_MASK(ahc, scb);
1465 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1466 SCB_GET_OUR_ID(scb),
1467 SCB_GET_TARGET(ahc, scb), &tstate);
1468 hscb->scsirate = tinfo->scsirate;
1469 hscb->scsioffset = tinfo->curr.offset;
1470 if ((tstate->ultraenb & mask) != 0)
1471 hscb->control |= ULTRAENB;
1473 if ((ahc->user_discenable & mask) != 0)
1474 hscb->control |= DISCENB;
1476 if ((tstate->auto_negotiate & mask) != 0) {
1477 scb->flags |= SCB_AUTO_NEGOTIATE;
1478 scb->hscb->control |= MK_MESSAGE;
1481 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1482 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1483 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1484 hscb->control |= ORDERED_QUEUE_TAG;
1485 dev->commands_since_idle_or_otag = 0;
1487 hscb->control |= SIMPLE_QUEUE_TAG;
1491 hscb->cdb_len = cmd->cmd_len;
1492 if (hscb->cdb_len <= 12) {
1493 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1495 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1496 scb->flags |= SCB_CDB32_PTR;
1499 scb->platform_data->xfer_len = 0;
1500 ahc_set_residual(scb, 0);
1501 ahc_set_sense_residual(scb, 0);
1505 struct ahc_dma_seg *sg;
1506 struct scatterlist *cur_seg;
1509 /* Copy the segments into the SG list. */
1512 * The sg_count may be larger than nseg if
1513 * a transfer crosses a 32bit page.
1515 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1520 addr = sg_dma_address(cur_seg);
1521 len = sg_dma_len(cur_seg);
1522 consumed = ahc_linux_map_seg(ahc, scb,
1525 scb->sg_count += consumed;
1528 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1531 * Reset the sg list pointer.
1534 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1537 * Copy the first SG into the "current"
1538 * data pointer area.
1540 scb->hscb->dataptr = scb->sg_list->addr;
1541 scb->hscb->datacnt = scb->sg_list->len;
1543 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1544 scb->hscb->dataptr = 0;
1545 scb->hscb->datacnt = 0;
1549 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1552 dev->commands_issued++;
1553 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1554 dev->commands_since_idle_or_otag++;
1556 scb->flags |= SCB_ACTIVE;
1558 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1559 scb->flags |= SCB_UNTAGGEDQ;
1561 ahc_queue_scb(ahc, scb);
1566 * SCSI controller interrupt handler.
1569 ahc_linux_isr(int irq, void *dev_id)
1571 struct ahc_softc *ahc;
1575 ahc = (struct ahc_softc *) dev_id;
1576 ahc_lock(ahc, &flags);
1577 ours = ahc_intr(ahc);
1578 ahc_unlock(ahc, &flags);
1579 return IRQ_RETVAL(ours);
1583 ahc_platform_flushwork(struct ahc_softc *ahc)
1589 ahc_send_async(struct ahc_softc *ahc, char channel,
1590 u_int target, u_int lun, ac_code code)
1593 case AC_TRANSFER_NEG:
1595 struct scsi_target *starget;
1596 struct ahc_initiator_tinfo *tinfo;
1597 struct ahc_tmode_tstate *tstate;
1599 unsigned int target_ppr_options;
1601 BUG_ON(target == CAM_TARGET_WILDCARD);
1603 tinfo = ahc_fetch_transinfo(ahc, channel,
1604 channel == 'A' ? ahc->our_id
1609 * Don't bother reporting results while
1610 * negotiations are still pending.
1612 if (tinfo->curr.period != tinfo->goal.period
1613 || tinfo->curr.width != tinfo->goal.width
1614 || tinfo->curr.offset != tinfo->goal.offset
1615 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1616 if (bootverbose == 0)
1620 * Don't bother reporting results that
1621 * are identical to those last reported.
1623 target_offset = target;
1626 starget = ahc->platform_data->starget[target_offset];
1627 if (starget == NULL)
1630 target_ppr_options =
1631 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1632 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1633 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1635 if (tinfo->curr.period == spi_period(starget)
1636 && tinfo->curr.width == spi_width(starget)
1637 && tinfo->curr.offset == spi_offset(starget)
1638 && tinfo->curr.ppr_options == target_ppr_options)
1639 if (bootverbose == 0)
1642 spi_period(starget) = tinfo->curr.period;
1643 spi_width(starget) = tinfo->curr.width;
1644 spi_offset(starget) = tinfo->curr.offset;
1645 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1646 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1647 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1648 spi_display_xfer_agreement(starget);
1653 WARN_ON(lun != CAM_LUN_WILDCARD);
1654 scsi_report_device_reset(ahc->platform_data->host,
1655 channel - 'A', target);
1659 if (ahc->platform_data->host != NULL) {
1660 scsi_report_bus_reset(ahc->platform_data->host,
1665 panic("ahc_send_async: Unexpected async event");
1670 * Calls the higher level scsi done function and frees the scb.
1673 ahc_done(struct ahc_softc *ahc, struct scb *scb)
1675 struct scsi_cmnd *cmd;
1676 struct ahc_linux_device *dev;
1678 LIST_REMOVE(scb, pending_links);
1679 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1680 struct scb_tailq *untagged_q;
1683 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1684 untagged_q = &(ahc->untagged_queues[target_offset]);
1685 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1686 BUG_ON(!TAILQ_EMPTY(untagged_q));
1687 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1689 * Transactions aborted from the untagged queue may
1690 * not have been dispatched to the controller, so
1691 * only check the SCB_ACTIVE flag for tagged transactions.
1693 printk("SCB %d done'd twice\n", scb->hscb->tag);
1694 ahc_dump_card_state(ahc);
1695 panic("Stopping for safety");
1698 dev = scb->platform_data->dev;
1701 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1702 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1705 ahc_linux_unmap_scb(ahc, scb);
1708 * Guard against stale sense data.
1709 * The Linux mid-layer assumes that sense
1710 * was retrieved anytime the first byte of
1711 * the sense buffer looks "sane".
1713 cmd->sense_buffer[0] = 0;
1714 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1715 #ifdef AHC_REPORT_UNDERFLOWS
1716 uint32_t amount_xferred;
1719 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1721 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1723 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1724 ahc_print_path(ahc, scb);
1725 printk("Set CAM_UNCOR_PARITY\n");
1728 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1729 #ifdef AHC_REPORT_UNDERFLOWS
1731 * This code is disabled by default as some
1732 * clients of the SCSI system do not properly
1733 * initialize the underflow parameter. This
1734 * results in spurious termination of commands
1735 * that complete as expected (e.g. underflow is
1736 * allowed as command can return variable amounts
1739 } else if (amount_xferred < scb->io_ctx->underflow) {
1742 ahc_print_path(ahc, scb);
1744 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1745 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1747 ahc_print_path(ahc, scb);
1748 printk("Saw underflow (%ld of %ld bytes). "
1749 "Treated as error\n",
1750 ahc_get_residual(scb),
1751 ahc_get_transfer_length(scb));
1752 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1755 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1757 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1758 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1761 if (dev->openings == 1
1762 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1763 && ahc_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL)
1764 dev->tag_success_count++;
1766 * Some devices deal with temporary internal resource
1767 * shortages by returning queue full. When the queue
1768 * full occurrs, we throttle back. Slowly try to get
1769 * back to our previous queue depth.
1771 if ((dev->openings + dev->active) < dev->maxtags
1772 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1773 dev->tag_success_count = 0;
1777 if (dev->active == 0)
1778 dev->commands_since_idle_or_otag = 0;
1780 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1781 printk("Recovery SCB completes\n");
1782 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1783 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1784 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1786 if (ahc->platform_data->eh_done)
1787 complete(ahc->platform_data->eh_done);
1790 ahc_free_scb(ahc, scb);
1791 ahc_linux_queue_cmd_complete(ahc, cmd);
1795 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
1796 struct scsi_device *sdev, struct scb *scb)
1798 struct ahc_devinfo devinfo;
1799 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1801 ahc_compile_devinfo(&devinfo,
1803 sdev->sdev_target->id, sdev->lun,
1804 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1808 * We don't currently trust the mid-layer to
1809 * properly deal with queue full or busy. So,
1810 * when one occurs, we tell the mid-layer to
1811 * unconditionally requeue the command to us
1812 * so that we can retry it ourselves. We also
1813 * implement our own throttling mechanism so
1814 * we don't clobber the device with too many
1817 switch (ahc_get_scsi_status(scb)) {
1820 case SAM_STAT_CHECK_CONDITION:
1821 case SAM_STAT_COMMAND_TERMINATED:
1823 struct scsi_cmnd *cmd;
1826 * Copy sense information to the OS's cmd
1827 * structure if it is available.
1830 if (scb->flags & SCB_SENSE) {
1833 sense_size = min(sizeof(struct scsi_sense_data)
1834 - ahc_get_sense_residual(scb),
1835 (u_long)SCSI_SENSE_BUFFERSIZE);
1836 memcpy(cmd->sense_buffer,
1837 ahc_get_sense_buf(ahc, scb), sense_size);
1838 if (sense_size < SCSI_SENSE_BUFFERSIZE)
1839 memset(&cmd->sense_buffer[sense_size], 0,
1840 SCSI_SENSE_BUFFERSIZE - sense_size);
1841 cmd->result |= (DRIVER_SENSE << 24);
1843 if (ahc_debug & AHC_SHOW_SENSE) {
1846 printk("Copied %d bytes of sense data:",
1848 for (i = 0; i < sense_size; i++) {
1851 printk("0x%x ", cmd->sense_buffer[i]);
1859 case SAM_STAT_TASK_SET_FULL:
1862 * By the time the core driver has returned this
1863 * command, all other commands that were queued
1864 * to us but not the device have been returned.
1865 * This ensures that dev->active is equal to
1866 * the number of commands actually queued to
1869 dev->tag_success_count = 0;
1870 if (dev->active != 0) {
1872 * Drop our opening count to the number
1873 * of commands currently outstanding.
1877 ahc_print_path(ahc, scb);
1878 printk("Dropping tag count to %d\n", dev->active);
1880 if (dev->active == dev->tags_on_last_queuefull) {
1882 dev->last_queuefull_same_count++;
1884 * If we repeatedly see a queue full
1885 * at the same queue depth, this
1886 * device has a fixed number of tag
1887 * slots. Lock in this tag depth
1888 * so we stop seeing queue fulls from
1891 if (dev->last_queuefull_same_count
1892 == AHC_LOCK_TAGS_COUNT) {
1893 dev->maxtags = dev->active;
1894 ahc_print_path(ahc, scb);
1895 printk("Locking max tag count at %d\n",
1899 dev->tags_on_last_queuefull = dev->active;
1900 dev->last_queuefull_same_count = 0;
1902 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1903 ahc_set_scsi_status(scb, SAM_STAT_GOOD);
1904 ahc_platform_set_tags(ahc, sdev, &devinfo,
1905 (dev->flags & AHC_DEV_Q_BASIC)
1906 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1910 * Drop down to a single opening, and treat this
1911 * as if the target returned BUSY SCSI status.
1914 ahc_set_scsi_status(scb, SAM_STAT_BUSY);
1915 ahc_platform_set_tags(ahc, sdev, &devinfo,
1916 (dev->flags & AHC_DEV_Q_BASIC)
1917 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1924 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1927 * Map CAM error codes into Linux Error codes. We
1928 * avoid the conversion so that the DV code has the
1929 * full error information available when making
1930 * state change decisions.
1935 switch (ahc_cmd_get_transaction_status(cmd)) {
1936 case CAM_REQ_INPROG:
1938 case CAM_SCSI_STATUS_ERROR:
1939 new_status = DID_OK;
1941 case CAM_REQ_ABORTED:
1942 new_status = DID_ABORT;
1945 new_status = DID_BUS_BUSY;
1947 case CAM_REQ_INVALID:
1948 case CAM_PATH_INVALID:
1949 new_status = DID_BAD_TARGET;
1951 case CAM_SEL_TIMEOUT:
1952 new_status = DID_NO_CONNECT;
1954 case CAM_SCSI_BUS_RESET:
1956 new_status = DID_RESET;
1958 case CAM_UNCOR_PARITY:
1959 new_status = DID_PARITY;
1961 case CAM_CMD_TIMEOUT:
1962 new_status = DID_TIME_OUT;
1965 case CAM_REQ_CMP_ERR:
1966 case CAM_AUTOSENSE_FAIL:
1968 case CAM_DATA_RUN_ERR:
1969 case CAM_UNEXP_BUSFREE:
1970 case CAM_SEQUENCE_FAIL:
1971 case CAM_CCB_LEN_ERR:
1972 case CAM_PROVIDE_FAIL:
1973 case CAM_REQ_TERMIO:
1974 case CAM_UNREC_HBA_ERROR:
1975 case CAM_REQ_TOO_BIG:
1976 new_status = DID_ERROR;
1978 case CAM_REQUEUE_REQ:
1979 new_status = DID_REQUEUE;
1982 /* We should never get here */
1983 new_status = DID_ERROR;
1987 ahc_cmd_set_transaction_status(cmd, new_status);
1990 cmd->scsi_done(cmd);
1994 ahc_linux_freeze_simq(struct ahc_softc *ahc)
1999 ahc->platform_data->qfrozen++;
2000 if (ahc->platform_data->qfrozen == 1) {
2001 scsi_block_requests(ahc->platform_data->host);
2003 /* XXX What about Twin channels? */
2004 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2005 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2006 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2008 ahc_unlock(ahc, &s);
2012 ahc_linux_release_simq(struct ahc_softc *ahc)
2019 if (ahc->platform_data->qfrozen > 0)
2020 ahc->platform_data->qfrozen--;
2021 if (ahc->platform_data->qfrozen == 0)
2023 ahc_unlock(ahc, &s);
2025 * There is still a race here. The mid-layer
2026 * should keep its own freeze count and use
2027 * a bottom half handler to run the queues
2028 * so we can unblock with our own lock held.
2031 scsi_unblock_requests(ahc->platform_data->host);
2035 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2037 struct ahc_softc *ahc;
2038 struct ahc_linux_device *dev;
2039 struct scb *pending_scb;
2041 u_int active_scb_index;
2050 unsigned long flags;
2055 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2057 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
2058 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2061 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2062 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2065 ahc_lock(ahc, &flags);
2068 * First determine if we currently own this command.
2069 * Start by searching the device queue. If not found
2070 * there, check the pending_scb list. If not found
2071 * at all, and the system wanted us to just abort the
2072 * command, return success.
2074 dev = scsi_transport_device_data(cmd->device);
2078 * No target device for this command exists,
2079 * so we must not still own the command.
2081 printk("%s:%d:%d:%d: Is not an active device\n",
2082 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2083 (u8)cmd->device->lun);
2088 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2089 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2090 cmd->device->channel + 'A',
2091 (u8)cmd->device->lun,
2092 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2093 printk("%s:%d:%d:%d: Command found on untagged queue\n",
2094 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2095 (u8)cmd->device->lun);
2101 * See if we can find a matching cmd in the pending list.
2103 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2104 if (pending_scb->io_ctx == cmd)
2108 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2110 /* Any SCB for this device will do for a target reset */
2111 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2112 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2113 scmd_channel(cmd) + 'A',
2115 SCB_LIST_NULL, ROLE_INITIATOR))
2120 if (pending_scb == NULL) {
2121 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2125 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2127 * We can't queue two recovery actions using the same SCB
2134 * Ensure that the card doesn't do anything
2135 * behind our back and that we didn't "just" miss
2136 * an interrupt that would affect this cmd.
2138 was_paused = ahc_is_paused(ahc);
2139 ahc_pause_and_flushwork(ahc);
2142 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2143 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2147 printk("%s: At time of recovery, card was %spaused\n",
2148 ahc_name(ahc), was_paused ? "" : "not ");
2149 ahc_dump_card_state(ahc);
2151 disconnected = TRUE;
2152 if (flag == SCB_ABORT) {
2153 if (ahc_search_qinfifo(ahc, cmd->device->id,
2154 cmd->device->channel + 'A',
2156 pending_scb->hscb->tag,
2157 ROLE_INITIATOR, CAM_REQ_ABORTED,
2158 SEARCH_COMPLETE) > 0) {
2159 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2160 ahc_name(ahc), cmd->device->channel,
2161 cmd->device->id, (u8)cmd->device->lun);
2165 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2166 cmd->device->channel + 'A',
2168 pending_scb->hscb->tag,
2169 ROLE_INITIATOR, /*status*/0,
2170 SEARCH_COUNT) > 0) {
2171 disconnected = FALSE;
2174 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2175 struct scb *bus_scb;
2177 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2178 if (bus_scb == pending_scb)
2179 disconnected = FALSE;
2180 else if (flag != SCB_ABORT
2181 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2182 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2183 disconnected = FALSE;
2187 * At this point, pending_scb is the scb associated with the
2188 * passed in command. That command is currently active on the
2189 * bus, is in the disconnected state, or we're hoping to find
2190 * a command for the same target active on the bus to abuse to
2191 * send a BDR. Queue the appropriate message based on which of
2192 * these states we are in.
2194 last_phase = ahc_inb(ahc, LASTPHASE);
2195 saved_scbptr = ahc_inb(ahc, SCBPTR);
2196 active_scb_index = ahc_inb(ahc, SCB_TAG);
2197 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2198 if (last_phase != P_BUSFREE
2199 && (pending_scb->hscb->tag == active_scb_index
2200 || (flag == SCB_DEVICE_RESET
2201 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
2204 * We're active on the bus, so assert ATN
2205 * and hope that the target responds.
2207 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2208 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2209 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2210 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2211 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2213 } else if (disconnected) {
2216 * Actually re-queue this SCB in an attempt
2217 * to select the device before it reconnects.
2218 * In either case (selection or reselection),
2219 * we will now issue the approprate message
2220 * to the timed-out device.
2222 * Set the MK_MESSAGE control bit indicating
2223 * that we desire to send a message. We
2224 * also set the disconnected flag since
2225 * in the paging case there is no guarantee
2226 * that our SCB control byte matches the
2227 * version on the card. We don't want the
2228 * sequencer to abort the command thinking
2229 * an unsolicited reselection occurred.
2231 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2232 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2235 * Remove any cached copy of this SCB in the
2236 * disconnected list in preparation for the
2237 * queuing of our abort SCB. We use the
2238 * same element in the SCB, SCB_NEXT, for
2239 * both the qinfifo and the disconnected list.
2241 ahc_search_disc_list(ahc, cmd->device->id,
2242 cmd->device->channel + 'A',
2243 cmd->device->lun, pending_scb->hscb->tag,
2244 /*stop_on_first*/TRUE,
2246 /*save_state*/FALSE);
2249 * In the non-paging case, the sequencer will
2250 * never re-reference the in-core SCB.
2251 * To make sure we are notified during
2252 * reselection, set the MK_MESSAGE flag in
2253 * the card's copy of the SCB.
2255 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2256 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2257 ahc_outb(ahc, SCB_CONTROL,
2258 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2262 * Clear out any entries in the QINFIFO first
2263 * so we are the next SCB for this target
2266 ahc_search_qinfifo(ahc, cmd->device->id,
2267 cmd->device->channel + 'A',
2268 cmd->device->lun, SCB_LIST_NULL,
2269 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2271 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2272 ahc_outb(ahc, SCBPTR, saved_scbptr);
2273 ahc_print_path(ahc, pending_scb);
2274 printk("Device is disconnected, re-queuing SCB\n");
2277 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2284 * Our assumption is that if we don't have the command, no
2285 * recovery action was required, so we return success. Again,
2286 * the semantics of the mid-layer recovery engine are not
2287 * well defined, so this may change in time.
2294 DECLARE_COMPLETION_ONSTACK(done);
2296 ahc->platform_data->eh_done = &done;
2297 ahc_unlock(ahc, &flags);
2299 printk("Recovery code sleeping\n");
2300 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2301 ahc_lock(ahc, &flags);
2302 ahc->platform_data->eh_done = NULL;
2303 ahc_unlock(ahc, &flags);
2305 printk("Timer Expired\n");
2308 printk("Recovery code awake\n");
2310 ahc_unlock(ahc, &flags);
2314 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2316 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2317 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2318 struct ahc_devinfo devinfo;
2319 unsigned long flags;
2321 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2322 starget->channel + 'A', ROLE_INITIATOR);
2323 ahc_lock(ahc, &flags);
2324 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2325 ahc_unlock(ahc, &flags);
2328 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2330 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2331 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2332 struct ahc_tmode_tstate *tstate;
2333 struct ahc_initiator_tinfo *tinfo
2334 = ahc_fetch_transinfo(ahc,
2335 starget->channel + 'A',
2336 shost->this_id, starget->id, &tstate);
2337 struct ahc_devinfo devinfo;
2338 unsigned int ppr_options = tinfo->goal.ppr_options;
2339 unsigned long flags;
2340 unsigned long offset = tinfo->goal.offset;
2341 const struct ahc_syncrate *syncrate;
2344 offset = MAX_OFFSET;
2347 period = 9; /* 12.5ns is our minimum */
2349 if (spi_max_width(starget))
2350 ppr_options |= MSG_EXT_PPR_DT_REQ;
2352 /* need wide for DT and need DT for 12.5 ns */
2356 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2357 starget->channel + 'A', ROLE_INITIATOR);
2359 /* all PPR requests apart from QAS require wide transfers */
2360 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2361 if (spi_width(starget) == 0)
2362 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2365 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
2367 ahc_lock(ahc, &flags);
2368 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2369 ppr_options, AHC_TRANS_GOAL, FALSE);
2370 ahc_unlock(ahc, &flags);
2373 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2375 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2376 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2377 struct ahc_tmode_tstate *tstate;
2378 struct ahc_initiator_tinfo *tinfo
2379 = ahc_fetch_transinfo(ahc,
2380 starget->channel + 'A',
2381 shost->this_id, starget->id, &tstate);
2382 struct ahc_devinfo devinfo;
2383 unsigned int ppr_options = 0;
2384 unsigned int period = 0;
2385 unsigned long flags;
2386 const struct ahc_syncrate *syncrate = NULL;
2388 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2389 starget->channel + 'A', ROLE_INITIATOR);
2391 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
2393 period = tinfo->goal.period;
2394 ppr_options = tinfo->goal.ppr_options;
2396 ahc_lock(ahc, &flags);
2397 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2398 ppr_options, AHC_TRANS_GOAL, FALSE);
2399 ahc_unlock(ahc, &flags);
2402 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2404 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2405 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2406 struct ahc_tmode_tstate *tstate;
2407 struct ahc_initiator_tinfo *tinfo
2408 = ahc_fetch_transinfo(ahc,
2409 starget->channel + 'A',
2410 shost->this_id, starget->id, &tstate);
2411 struct ahc_devinfo devinfo;
2412 unsigned int ppr_options = tinfo->goal.ppr_options
2413 & ~MSG_EXT_PPR_DT_REQ;
2414 unsigned int period = tinfo->goal.period;
2415 unsigned int width = tinfo->goal.width;
2416 unsigned long flags;
2417 const struct ahc_syncrate *syncrate;
2419 if (dt && spi_max_width(starget)) {
2420 ppr_options |= MSG_EXT_PPR_DT_REQ;
2422 ahc_linux_set_width(starget, 1);
2423 } else if (period == 9)
2424 period = 10; /* if resetting DT, period must be >= 25ns */
2426 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2427 starget->channel + 'A', ROLE_INITIATOR);
2428 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
2430 ahc_lock(ahc, &flags);
2431 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2432 ppr_options, AHC_TRANS_GOAL, FALSE);
2433 ahc_unlock(ahc, &flags);
2437 /* FIXME: This code claims to support IU and QAS. However, the actual
2438 * sequencer code and aic7xxx_core have no support for these parameters and
2439 * will get into a bad state if they're negotiated. Do not enable this
2440 * unless you know what you're doing */
2441 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2443 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2444 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2445 struct ahc_tmode_tstate *tstate;
2446 struct ahc_initiator_tinfo *tinfo
2447 = ahc_fetch_transinfo(ahc,
2448 starget->channel + 'A',
2449 shost->this_id, starget->id, &tstate);
2450 struct ahc_devinfo devinfo;
2451 unsigned int ppr_options = tinfo->goal.ppr_options
2452 & ~MSG_EXT_PPR_QAS_REQ;
2453 unsigned int period = tinfo->goal.period;
2454 unsigned long flags;
2455 struct ahc_syncrate *syncrate;
2458 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2460 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2461 starget->channel + 'A', ROLE_INITIATOR);
2462 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
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);
2470 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2472 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2473 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2474 struct ahc_tmode_tstate *tstate;
2475 struct ahc_initiator_tinfo *tinfo
2476 = ahc_fetch_transinfo(ahc,
2477 starget->channel + 'A',
2478 shost->this_id, starget->id, &tstate);
2479 struct ahc_devinfo devinfo;
2480 unsigned int ppr_options = tinfo->goal.ppr_options
2481 & ~MSG_EXT_PPR_IU_REQ;
2482 unsigned int period = tinfo->goal.period;
2483 unsigned long flags;
2484 struct ahc_syncrate *syncrate;
2487 ppr_options |= MSG_EXT_PPR_IU_REQ;
2489 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2490 starget->channel + 'A', ROLE_INITIATOR);
2491 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,
2493 ahc_lock(ahc, &flags);
2494 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2495 ppr_options, AHC_TRANS_GOAL, FALSE);
2496 ahc_unlock(ahc, &flags);
2500 static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2502 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
2503 unsigned long flags;
2506 if (!(ahc->features & AHC_ULTRA2)) {
2507 /* non-LVD chipset, may not have SBLKCTL reg */
2508 spi_signalling(shost) =
2509 ahc->features & AHC_HVD ?
2515 ahc_lock(ahc, &flags);
2517 mode = ahc_inb(ahc, SBLKCTL);
2519 ahc_unlock(ahc, &flags);
2522 spi_signalling(shost) = SPI_SIGNAL_LVD;
2523 else if (mode & ENAB20)
2524 spi_signalling(shost) = SPI_SIGNAL_SE;
2526 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2529 static struct spi_function_template ahc_linux_transport_functions = {
2530 .set_offset = ahc_linux_set_offset,
2532 .set_period = ahc_linux_set_period,
2534 .set_width = ahc_linux_set_width,
2536 .set_dt = ahc_linux_set_dt,
2539 .set_iu = ahc_linux_set_iu,
2541 .set_qas = ahc_linux_set_qas,
2544 .get_signalling = ahc_linux_get_signalling,
2550 ahc_linux_init(void)
2553 * If we've been passed any parameters, process them now.
2556 aic7xxx_setup(aic7xxx);
2558 ahc_linux_transport_template =
2559 spi_attach_transport(&ahc_linux_transport_functions);
2560 if (!ahc_linux_transport_template)
2563 scsi_transport_reserve_device(ahc_linux_transport_template,
2564 sizeof(struct ahc_linux_device));
2566 ahc_linux_pci_init();
2567 ahc_linux_eisa_init();
2572 ahc_linux_exit(void)
2574 ahc_linux_pci_exit();
2575 ahc_linux_eisa_exit();
2576 spi_release_transport(ahc_linux_transport_template);
2579 module_init(ahc_linux_init);
2580 module_exit(ahc_linux_exit);