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 */
132 #include <linux/slab.h>
136 * Set this to the delay in seconds after SCSI bus reset.
137 * Note, we honor this only for the initial bus reset.
138 * The scsi error recovery code performs its own bus settle
139 * delay handling for error recovery actions.
141 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
142 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
144 #define AIC7XXX_RESET_DELAY 5000
148 * To change the default number of tagged transactions allowed per-device,
149 * add a line to the lilo.conf file like:
150 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
151 * which will result in the first four devices on the first two
152 * controllers being set to a tagged queue depth of 32.
154 * The tag_commands is an array of 16 to allow for wide and twin adapters.
155 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
159 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
160 } adapter_tag_info_t;
163 * Modify this as you see fit for your system.
165 * 0 tagged queuing disabled
166 * 1 <= n <= 253 n == max tags ever dispatched.
168 * The driver will throttle the number of commands dispatched to a
169 * device if it returns queue full. For devices with a fixed maximum
170 * queue depth, the driver will eventually determine this depth and
171 * lock it in (a console message is printed to indicate that a lock
172 * has occurred). On some devices, queue full is returned for a temporary
173 * resource shortage. These devices will return queue full at varying
174 * depths. The driver will throttle back when the queue fulls occur and
175 * attempt to slowly increase the depth over time as the device recovers
176 * from the resource shortage.
178 * In this example, the first line will disable tagged queueing for all
179 * the devices on the first probed aic7xxx adapter.
181 * The second line enables tagged queueing with 4 commands/LUN for IDs
182 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
183 * driver to attempt to use up to 64 tags for ID 1.
185 * The third line is the same as the first line.
187 * The fourth line disables tagged queueing for devices 0 and 3. It
188 * enables tagged queueing for the other IDs, with 16 commands/LUN
189 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
190 * IDs 2, 5-7, and 9-15.
194 * NOTE: The below structure is for reference only, the actual structure
195 * to modify in order to change things is just below this comment block.
196 adapter_tag_info_t aic7xxx_tag_info[] =
198 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
199 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
200 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
201 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
205 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
206 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
208 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
211 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
212 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
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 \
223 * By default, use the number of commands specified by
224 * the users kernel configuration.
226 static adapter_tag_info_t aic7xxx_tag_info[] =
228 {AIC7XXX_CONFIGED_TAG_COMMANDS},
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}
247 * There should be a specific return value for this in scsi.h, but
248 * it seems that most drivers ignore it.
250 #define DID_UNDERFLOW DID_ERROR
253 ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
255 printk("(scsi%d:%c:%d:%d): ",
256 ahc->platform_data->host->host_no,
257 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
258 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
259 scb != NULL ? SCB_GET_LUN(scb) : -1);
263 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
264 * cards in the system. This should be fixed. Exceptions to this
265 * rule are noted in the comments.
269 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
270 * has no effect on any later resets that might occur due to things like
273 static uint32_t aic7xxx_no_reset;
276 * Should we force EXTENDED translation on a controller.
277 * 0 == Use whatever is in the SEEPROM or default to off
278 * 1 == Use whatever is in the SEEPROM or default to on
280 static uint32_t aic7xxx_extended;
283 * PCI bus parity checking of the Adaptec controllers. This is somewhat
284 * dubious at best. To my knowledge, this option has never actually
285 * solved a PCI parity problem, but on certain machines with broken PCI
286 * chipset configurations where stray PCI transactions with bad parity are
287 * the norm rather than the exception, the error messages can be overwhelming.
288 * It's included in the driver for completeness.
289 * 0 = Shut off PCI parity check
290 * non-0 = reverse polarity pci parity checking
292 static uint32_t aic7xxx_pci_parity = ~0;
295 * There are lots of broken chipsets in the world. Some of them will
296 * violate the PCI spec when we issue byte sized memory writes to our
297 * controller. I/O mapped register access, if allowed by the given
298 * platform, will work in almost all cases.
300 uint32_t aic7xxx_allow_memio = ~0;
303 * So that we can set how long each device is given as a selection timeout.
304 * The table of values goes like this:
309 * We default to 256ms because some older devices need a longer time
310 * to respond to initial selection.
312 static uint32_t aic7xxx_seltime;
315 * Certain devices do not perform any aging on commands. Should the
316 * device be saturated by commands in one portion of the disk, it is
317 * possible for transactions on far away sectors to never be serviced.
318 * To handle these devices, we can periodically send an ordered tag to
319 * force all outstanding transactions to be serviced prior to a new
322 static uint32_t aic7xxx_periodic_otag;
325 * Module information and settable options.
327 static char *aic7xxx = NULL;
329 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
330 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
331 MODULE_LICENSE("Dual BSD/GPL");
332 MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
333 module_param(aic7xxx, charp, 0444);
334 MODULE_PARM_DESC(aic7xxx,
335 "period-delimited options string:\n"
336 " verbose Enable verbose/diagnostic logging\n"
337 " allow_memio Allow device registers to be memory mapped\n"
338 " debug Bitmask of debug values to enable\n"
339 " no_probe Toggle EISA/VLB controller probing\n"
340 " probe_eisa_vl Toggle EISA/VLB controller probing\n"
341 " no_reset Suppress initial bus resets\n"
342 " extended Enable extended geometry on all controllers\n"
343 " periodic_otag Send an ordered tagged transaction\n"
344 " periodically to prevent tag starvation.\n"
345 " This may be required by some older disk\n"
346 " drives or RAID arrays.\n"
347 " tag_info:<tag_str> Set per-target tag depth\n"
348 " global_tag_depth:<int> Global tag depth for every target\n"
350 " seltime:<int> Selection Timeout\n"
351 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
353 " Sample modprobe configuration file:\n"
354 " # Toggle EISA/VLB probing\n"
355 " # Set tag depth on Controller 1/Target 1 to 10 tags\n"
356 " # Shorten the selection timeout to 128ms\n"
358 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
361 static void ahc_linux_handle_scsi_status(struct ahc_softc *,
362 struct scsi_device *,
364 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
365 struct scsi_cmnd *cmd);
366 static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
367 static void ahc_linux_release_simq(struct ahc_softc *ahc);
368 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
369 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
370 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
371 struct ahc_devinfo *devinfo);
372 static void ahc_linux_device_queue_depth(struct scsi_device *);
373 static int ahc_linux_run_command(struct ahc_softc*,
374 struct ahc_linux_device *,
376 static void ahc_linux_setup_tag_info_global(char *p);
377 static int aic7xxx_setup(char *s);
379 static int ahc_linux_unit;
382 /************************** OS Utility Wrappers *******************************/
387 * udelay on Linux can have problems for
388 * multi-millisecond waits. Wait at most
397 /***************************** Low Level I/O **********************************/
399 ahc_inb(struct ahc_softc * ahc, long port)
403 if (ahc->tag == BUS_SPACE_MEMIO) {
404 x = readb(ahc->bsh.maddr + port);
406 x = inb(ahc->bsh.ioport + port);
413 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val)
415 if (ahc->tag == BUS_SPACE_MEMIO) {
416 writeb(val, ahc->bsh.maddr + port);
418 outb(val, ahc->bsh.ioport + port);
424 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
429 * There is probably a more efficient way to do this on Linux
430 * but we don't use this for anything speed critical and this
433 for (i = 0; i < count; i++)
434 ahc_outb(ahc, port, *array++);
438 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count)
443 * There is probably a more efficient way to do this on Linux
444 * but we don't use this for anything speed critical and this
447 for (i = 0; i < count; i++)
448 *array++ = ahc_inb(ahc, port);
451 /********************************* Inlines ************************************/
452 static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
454 static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
455 struct ahc_dma_seg *sg,
456 dma_addr_t addr, bus_size_t len);
459 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
461 struct scsi_cmnd *cmd;
464 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
470 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
471 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
475 if ((scb->sg_count + 1) > AHC_NSEG)
476 panic("Too few segs for dma mapping. "
477 "Increase AHC_NSEG\n");
480 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
481 scb->platform_data->xfer_len += len;
483 if (sizeof(dma_addr_t) > 4
484 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
485 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
487 sg->len = ahc_htole32(len);
492 * Return a string describing the driver.
495 ahc_linux_info(struct Scsi_Host *host)
497 static char buffer[512];
500 struct ahc_softc *ahc;
503 ahc = *(struct ahc_softc **)host->hostdata;
504 memset(bp, 0, sizeof(buffer));
505 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n"
507 strcat(bp, ahc->description);
510 ahc_controller_info(ahc, ahc_info);
511 strcat(bp, ahc_info);
518 * Queue an SCB to the controller.
521 ahc_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
523 struct ahc_softc *ahc;
524 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
525 int rtn = SCSI_MLQUEUE_HOST_BUSY;
528 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
530 ahc_lock(ahc, &flags);
531 if (ahc->platform_data->qfrozen == 0) {
532 cmd->scsi_done = scsi_done;
533 cmd->result = CAM_REQ_INPROG << 16;
534 rtn = ahc_linux_run_command(ahc, dev, cmd);
536 ahc_unlock(ahc, &flags);
541 static DEF_SCSI_QCMD(ahc_linux_queue)
543 static inline struct scsi_target **
544 ahc_linux_target_in_softc(struct scsi_target *starget)
546 struct ahc_softc *ahc =
547 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
548 unsigned int target_offset;
550 target_offset = starget->id;
551 if (starget->channel != 0)
554 return &ahc->platform_data->starget[target_offset];
558 ahc_linux_target_alloc(struct scsi_target *starget)
560 struct ahc_softc *ahc =
561 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
562 struct seeprom_config *sc = ahc->seep_config;
564 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
565 unsigned short scsirate;
566 struct ahc_devinfo devinfo;
567 struct ahc_initiator_tinfo *tinfo;
568 struct ahc_tmode_tstate *tstate;
569 char channel = starget->channel + 'A';
570 unsigned int our_id = ahc->our_id;
571 unsigned int target_offset;
573 target_offset = starget->id;
574 if (starget->channel != 0)
577 if (starget->channel)
578 our_id = ahc->our_id_b;
580 ahc_lock(ahc, &flags);
582 BUG_ON(*ahc_targp != NULL);
584 *ahc_targp = starget;
587 int maxsync = AHC_SYNCRATE_DT;
589 int flags = sc->device_flags[target_offset];
591 if (ahc->flags & AHC_NEWEEPROM_FMT) {
592 if (flags & CFSYNCHISULTRA)
594 } else if (flags & CFULTRAEN)
596 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
597 * change it to ultra=0, CFXFER = 0 */
598 if(ultra && (flags & CFXFER) == 0x04) {
603 if ((ahc->features & AHC_ULTRA2) != 0) {
604 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
606 scsirate = (flags & CFXFER) << 4;
607 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
610 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
611 if (!(flags & CFSYNCH))
612 spi_max_offset(starget) = 0;
613 spi_min_period(starget) =
614 ahc_find_period(ahc, scsirate, maxsync);
616 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
617 starget->id, &tstate);
619 ahc_compile_devinfo(&devinfo, our_id, starget->id,
620 CAM_LUN_WILDCARD, channel,
622 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
623 AHC_TRANS_GOAL, /*paused*/FALSE);
624 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
625 AHC_TRANS_GOAL, /*paused*/FALSE);
626 ahc_unlock(ahc, &flags);
632 ahc_linux_target_destroy(struct scsi_target *starget)
634 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
640 ahc_linux_slave_alloc(struct scsi_device *sdev)
642 struct ahc_softc *ahc =
643 *((struct ahc_softc **)sdev->host->hostdata);
644 struct scsi_target *starget = sdev->sdev_target;
645 struct ahc_linux_device *dev;
648 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
650 dev = scsi_transport_device_data(sdev);
651 memset(dev, 0, sizeof(*dev));
654 * We start out life using untagged
655 * transactions of which we allow one.
660 * Set maxtags to 0. This will be changed if we
661 * later determine that we are dealing with
662 * a tagged queuing capable device.
666 spi_period(starget) = 0;
672 ahc_linux_slave_configure(struct scsi_device *sdev)
674 struct ahc_softc *ahc;
676 ahc = *((struct ahc_softc **)sdev->host->hostdata);
679 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
681 ahc_linux_device_queue_depth(sdev);
683 /* Initial Domain Validation */
684 if (!spi_initial_dv(sdev->sdev_target))
690 #if defined(__i386__)
692 * Return the disk geometry for the given SCSI device.
695 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
696 sector_t capacity, int geom[])
704 struct ahc_softc *ahc;
707 ahc = *((struct ahc_softc **)sdev->host->hostdata);
708 channel = sdev_channel(sdev);
710 bh = scsi_bios_ptable(bdev);
712 ret = scsi_partsize(bh, capacity,
713 &geom[2], &geom[0], &geom[1]);
720 cylinders = aic_sector_div(capacity, heads, sectors);
722 if (aic7xxx_extended != 0)
724 else if (channel == 0)
725 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
727 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
728 if (extended && cylinders >= 1024) {
731 cylinders = aic_sector_div(capacity, heads, sectors);
741 * Abort the current SCSI command(s).
744 ahc_linux_abort(struct scsi_cmnd *cmd)
748 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
750 printk("aic7xxx_abort returns 0x%x\n", error);
755 * Attempt to send a target reset message to the device that timed out.
758 ahc_linux_dev_reset(struct scsi_cmnd *cmd)
762 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
764 printk("aic7xxx_dev_reset returns 0x%x\n", error);
769 * Reset the SCSI bus.
772 ahc_linux_bus_reset(struct scsi_cmnd *cmd)
774 struct ahc_softc *ahc;
778 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
780 ahc_lock(ahc, &flags);
781 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
782 /*initiate reset*/TRUE);
783 ahc_unlock(ahc, &flags);
786 printk("%s: SCSI bus reset delivered. "
787 "%d SCBs aborted.\n", ahc_name(ahc), found);
792 struct scsi_host_template aic7xxx_driver_template = {
793 .module = THIS_MODULE,
795 .proc_name = "aic7xxx",
796 .show_info = ahc_linux_show_info,
797 .write_info = ahc_proc_write_seeprom,
798 .info = ahc_linux_info,
799 .queuecommand = ahc_linux_queue,
800 .eh_abort_handler = ahc_linux_abort,
801 .eh_device_reset_handler = ahc_linux_dev_reset,
802 .eh_bus_reset_handler = ahc_linux_bus_reset,
803 #if defined(__i386__)
804 .bios_param = ahc_linux_biosparam,
806 .can_queue = AHC_MAX_QUEUE,
810 .use_clustering = ENABLE_CLUSTERING,
811 .slave_alloc = ahc_linux_slave_alloc,
812 .slave_configure = ahc_linux_slave_configure,
813 .target_alloc = ahc_linux_target_alloc,
814 .target_destroy = ahc_linux_target_destroy,
818 /**************************** Tasklet Handler *********************************/
820 /******************************** Macros **************************************/
821 #define BUILD_SCSIID(ahc, cmd) \
822 ((((cmd)->device->id << TID_SHIFT) & TID) \
823 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
824 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
826 /******************************** Bus DMA *************************************/
828 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
829 bus_size_t alignment, bus_size_t boundary,
830 dma_addr_t lowaddr, dma_addr_t highaddr,
831 bus_dma_filter_t *filter, void *filterarg,
832 bus_size_t maxsize, int nsegments,
833 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
837 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
842 * Linux is very simplistic about DMA memory. For now don't
843 * maintain all specification information. Once Linux supplies
844 * better facilities for doing these operations, or the
845 * needs of this particular driver change, we might need to do
848 dmat->alignment = alignment;
849 dmat->boundary = boundary;
850 dmat->maxsize = maxsize;
856 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
862 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
863 int flags, bus_dmamap_t *mapp)
865 *vaddr = pci_alloc_consistent(ahc->dev_softc,
866 dmat->maxsize, mapp);
873 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
874 void* vaddr, bus_dmamap_t map)
876 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
881 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
882 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
883 void *cb_arg, int flags)
886 * Assume for now that this will only be used during
887 * initialization and not for per-transaction buffer mapping.
889 bus_dma_segment_t stack_sg;
891 stack_sg.ds_addr = map;
892 stack_sg.ds_len = dmat->maxsize;
893 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
898 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
903 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
910 ahc_linux_setup_tag_info_global(char *p)
914 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
915 printk("Setting Global Tags= %d\n", tags);
917 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
918 for (j = 0; j < AHC_NUM_TARGETS; j++) {
919 aic7xxx_tag_info[i].tag_commands[j] = tags;
925 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
928 if ((instance >= 0) && (targ >= 0)
929 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
930 && (targ < AHC_NUM_TARGETS)) {
931 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
933 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
938 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
939 void (*callback)(u_long, int, int, int32_t),
948 char tok_list[] = {'.', ',', '{', '}', '\0'};
950 /* All options use a ':' name/arg separator */
958 * Restore separator that may be in
959 * the middle of our option argument.
961 tok_end = strchr(opt_arg, '\0');
967 if (instance == -1) {
974 printk("Malformed Option %s\n",
984 else if (instance != -1)
994 else if (instance >= 0)
1003 for (i = 0; tok_list[i]; i++) {
1004 tok_end2 = strchr(opt_arg, tok_list[i]);
1005 if ((tok_end2) && (tok_end2 < tok_end))
1008 callback(callback_arg, instance, targ,
1009 simple_strtol(opt_arg, NULL, 0));
1018 * Handle Linux boot parameters. This routine allows for assigning a value
1019 * to a parameter with a ':' between the parameter and the value.
1020 * ie. aic7xxx=stpwlev:1,extended
1023 aic7xxx_setup(char *s)
1029 static const struct {
1033 { "extended", &aic7xxx_extended },
1034 { "no_reset", &aic7xxx_no_reset },
1035 { "verbose", &aic7xxx_verbose },
1036 { "allow_memio", &aic7xxx_allow_memio},
1038 { "debug", &ahc_debug },
1040 { "periodic_otag", &aic7xxx_periodic_otag },
1041 { "pci_parity", &aic7xxx_pci_parity },
1042 { "seltime", &aic7xxx_seltime },
1043 { "tag_info", NULL },
1044 { "global_tag_depth", NULL },
1048 end = strchr(s, '\0');
1051 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1052 * will never be 0 in this case.
1056 while ((p = strsep(&s, ",.")) != NULL) {
1059 for (i = 0; i < ARRAY_SIZE(options); i++) {
1061 n = strlen(options[i].name);
1062 if (strncmp(options[i].name, p, n) == 0)
1065 if (i == ARRAY_SIZE(options))
1068 if (strncmp(p, "global_tag_depth", n) == 0) {
1069 ahc_linux_setup_tag_info_global(p + n);
1070 } else if (strncmp(p, "tag_info", n) == 0) {
1071 s = ahc_parse_brace_option("tag_info", p + n, end,
1072 2, ahc_linux_setup_tag_info, 0);
1073 } else if (p[n] == ':') {
1074 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1075 } else if (strncmp(p, "verbose", n) == 0) {
1076 *(options[i].flag) = 1;
1078 *(options[i].flag) ^= 0xFFFFFFFF;
1084 __setup("aic7xxx=", aic7xxx_setup);
1086 uint32_t aic7xxx_verbose;
1089 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1092 struct Scsi_Host *host;
1097 template->name = ahc->description;
1098 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1102 *((struct ahc_softc **)host->hostdata) = ahc;
1103 ahc->platform_data->host = host;
1104 host->can_queue = AHC_MAX_QUEUE;
1105 host->cmd_per_lun = 2;
1106 /* XXX No way to communicate the ID for multiple channels */
1107 host->this_id = ahc->our_id;
1108 host->irq = ahc->platform_data->irq;
1109 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1110 host->max_lun = AHC_NUM_LUNS;
1111 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1112 host->sg_tablesize = AHC_NSEG;
1114 ahc_set_unit(ahc, ahc_linux_unit++);
1115 ahc_unlock(ahc, &s);
1116 sprintf(buf, "scsi%d", host->host_no);
1117 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1118 if (new_name != NULL) {
1119 strcpy(new_name, buf);
1120 ahc_set_name(ahc, new_name);
1122 host->unique_id = ahc->unit;
1123 ahc_linux_initialize_scsi_bus(ahc);
1124 ahc_intr_enable(ahc, TRUE);
1126 host->transportt = ahc_linux_transport_template;
1128 retval = scsi_add_host(host,
1129 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1131 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1132 scsi_host_put(host);
1136 scsi_scan_host(host);
1141 * Place the SCSI bus into a known state by either resetting it,
1142 * or forcing transfer negotiations on the next command to any
1146 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1157 if (aic7xxx_no_reset != 0)
1158 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1160 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1161 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1163 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1165 if ((ahc->features & AHC_TWIN) != 0) {
1167 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1168 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1177 * Force negotiation to async for all targets that
1178 * will not see an initial bus reset.
1180 for (; i < numtarg; i++) {
1181 struct ahc_devinfo devinfo;
1182 struct ahc_initiator_tinfo *tinfo;
1183 struct ahc_tmode_tstate *tstate;
1189 our_id = ahc->our_id;
1191 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1193 our_id = ahc->our_id_b;
1196 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1197 target_id, &tstate);
1198 ahc_compile_devinfo(&devinfo, our_id, target_id,
1199 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1200 ahc_update_neg_request(ahc, &devinfo, tstate,
1201 tinfo, AHC_NEG_ALWAYS);
1203 ahc_unlock(ahc, &s);
1204 /* Give the bus some time to recover */
1205 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1206 ahc_linux_freeze_simq(ahc);
1207 msleep(AIC7XXX_RESET_DELAY);
1208 ahc_linux_release_simq(ahc);
1213 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1216 ahc->platform_data =
1217 kmalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
1218 if (ahc->platform_data == NULL)
1220 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1221 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1223 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1224 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1225 if (aic7xxx_pci_parity == 0)
1226 ahc->flags |= AHC_DISABLE_PCI_PERR;
1232 ahc_platform_free(struct ahc_softc *ahc)
1234 struct scsi_target *starget;
1237 if (ahc->platform_data != NULL) {
1238 /* destroy all of the device and target objects */
1239 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1240 starget = ahc->platform_data->starget[i];
1241 if (starget != NULL) {
1242 ahc->platform_data->starget[i] = NULL;
1246 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1247 free_irq(ahc->platform_data->irq, ahc);
1248 if (ahc->tag == BUS_SPACE_PIO
1249 && ahc->bsh.ioport != 0)
1250 release_region(ahc->bsh.ioport, 256);
1251 if (ahc->tag == BUS_SPACE_MEMIO
1252 && ahc->bsh.maddr != NULL) {
1253 iounmap(ahc->bsh.maddr);
1254 release_mem_region(ahc->platform_data->mem_busaddr,
1258 if (ahc->platform_data->host)
1259 scsi_host_put(ahc->platform_data->host);
1261 kfree(ahc->platform_data);
1266 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1268 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1269 SCB_GET_CHANNEL(ahc, scb),
1270 SCB_GET_LUN(scb), SCB_LIST_NULL,
1271 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1275 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1276 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1278 struct ahc_linux_device *dev;
1284 dev = scsi_transport_device_data(sdev);
1286 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1289 case AHC_QUEUE_NONE:
1292 case AHC_QUEUE_BASIC:
1293 now_queuing = AHC_DEV_Q_BASIC;
1295 case AHC_QUEUE_TAGGED:
1296 now_queuing = AHC_DEV_Q_TAGGED;
1299 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1300 && (was_queuing != now_queuing)
1301 && (dev->active != 0)) {
1302 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1306 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1310 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1313 * Start out aggressively and allow our
1314 * dynamic queue depth algorithm to take
1317 dev->maxtags = usertags;
1318 dev->openings = dev->maxtags - dev->active;
1320 if (dev->maxtags == 0) {
1322 * Queueing is disabled by the user.
1325 } else if (alg == AHC_QUEUE_TAGGED) {
1326 dev->flags |= AHC_DEV_Q_TAGGED;
1327 if (aic7xxx_periodic_otag != 0)
1328 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1330 dev->flags |= AHC_DEV_Q_BASIC;
1332 /* We can only have one opening. */
1334 dev->openings = 1 - dev->active;
1336 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1337 case AHC_DEV_Q_BASIC:
1338 case AHC_DEV_Q_TAGGED:
1339 scsi_change_queue_depth(sdev,
1340 dev->openings + dev->active);
1343 * We allow the OS to queue 2 untagged transactions to
1344 * us at any time even though we can only execute them
1345 * serially on the controller/device. This should
1346 * remove some latency.
1348 scsi_change_queue_depth(sdev, 2);
1354 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1355 int lun, u_int tag, role_t role, uint32_t status)
1361 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1363 static int warned_user;
1367 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1368 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
1369 if (warned_user == 0) {
1372 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1373 "aic7xxx: for installed controllers. Using defaults\n"
1374 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1375 "aic7xxx: the aic7xxx_osm..c source file.\n");
1378 tags = AHC_MAX_QUEUE;
1380 adapter_tag_info_t *tag_info;
1382 tag_info = &aic7xxx_tag_info[ahc->unit];
1383 tags = tag_info->tag_commands[devinfo->target_offset];
1384 if (tags > AHC_MAX_QUEUE)
1385 tags = AHC_MAX_QUEUE;
1392 * Determines the queue depth for a given device.
1395 ahc_linux_device_queue_depth(struct scsi_device *sdev)
1397 struct ahc_devinfo devinfo;
1399 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1401 ahc_compile_devinfo(&devinfo,
1402 sdev->sdev_target->channel == 0
1403 ? ahc->our_id : ahc->our_id_b,
1404 sdev->sdev_target->id, sdev->lun,
1405 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1407 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1408 if (tags != 0 && sdev->tagged_supported != 0) {
1410 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1411 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1412 devinfo.lun, AC_TRANSFER_NEG);
1413 ahc_print_devinfo(ahc, &devinfo);
1414 printk("Tagged Queuing enabled. Depth %d\n", tags);
1416 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1417 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1418 devinfo.lun, AC_TRANSFER_NEG);
1423 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1424 struct scsi_cmnd *cmd)
1427 struct hardware_scb *hscb;
1428 struct ahc_initiator_tinfo *tinfo;
1429 struct ahc_tmode_tstate *tstate;
1431 struct scb_tailq *untagged_q = NULL;
1435 * Schedule us to run later. The only reason we are not
1436 * running is because the whole controller Q is frozen.
1438 if (ahc->platform_data->qfrozen != 0)
1439 return SCSI_MLQUEUE_HOST_BUSY;
1442 * We only allow one untagged transaction
1443 * per target in the initiator role unless
1444 * we are storing a full busy target *lun*
1445 * table in SCB space.
1447 if (!(cmd->flags & SCMD_TAGGED)
1448 && (ahc->features & AHC_SCB_BTT) == 0) {
1451 target_offset = cmd->device->id + cmd->device->channel * 8;
1452 untagged_q = &(ahc->untagged_queues[target_offset]);
1453 if (!TAILQ_EMPTY(untagged_q))
1454 /* if we're already executing an untagged command
1455 * we're busy to another */
1456 return SCSI_MLQUEUE_DEVICE_BUSY;
1459 nseg = scsi_dma_map(cmd);
1461 return SCSI_MLQUEUE_HOST_BUSY;
1464 * Get an scb to use.
1466 scb = ahc_get_scb(ahc);
1468 scsi_dma_unmap(cmd);
1469 return SCSI_MLQUEUE_HOST_BUSY;
1473 scb->platform_data->dev = dev;
1475 cmd->host_scribble = (char *)scb;
1478 * Fill out basics of the HSCB.
1481 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1482 hscb->lun = cmd->device->lun;
1483 mask = SCB_GET_TARGET_MASK(ahc, scb);
1484 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1485 SCB_GET_OUR_ID(scb),
1486 SCB_GET_TARGET(ahc, scb), &tstate);
1487 hscb->scsirate = tinfo->scsirate;
1488 hscb->scsioffset = tinfo->curr.offset;
1489 if ((tstate->ultraenb & mask) != 0)
1490 hscb->control |= ULTRAENB;
1492 if ((ahc->user_discenable & mask) != 0)
1493 hscb->control |= DISCENB;
1495 if ((tstate->auto_negotiate & mask) != 0) {
1496 scb->flags |= SCB_AUTO_NEGOTIATE;
1497 scb->hscb->control |= MK_MESSAGE;
1500 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1501 if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1502 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1503 hscb->control |= MSG_ORDERED_TASK;
1504 dev->commands_since_idle_or_otag = 0;
1506 hscb->control |= MSG_SIMPLE_TASK;
1510 hscb->cdb_len = cmd->cmd_len;
1511 if (hscb->cdb_len <= 12) {
1512 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1514 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1515 scb->flags |= SCB_CDB32_PTR;
1518 scb->platform_data->xfer_len = 0;
1519 ahc_set_residual(scb, 0);
1520 ahc_set_sense_residual(scb, 0);
1524 struct ahc_dma_seg *sg;
1525 struct scatterlist *cur_seg;
1528 /* Copy the segments into the SG list. */
1531 * The sg_count may be larger than nseg if
1532 * a transfer crosses a 32bit page.
1534 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1539 addr = sg_dma_address(cur_seg);
1540 len = sg_dma_len(cur_seg);
1541 consumed = ahc_linux_map_seg(ahc, scb,
1544 scb->sg_count += consumed;
1547 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1550 * Reset the sg list pointer.
1553 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1556 * Copy the first SG into the "current"
1557 * data pointer area.
1559 scb->hscb->dataptr = scb->sg_list->addr;
1560 scb->hscb->datacnt = scb->sg_list->len;
1562 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1563 scb->hscb->dataptr = 0;
1564 scb->hscb->datacnt = 0;
1568 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1571 dev->commands_issued++;
1572 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1573 dev->commands_since_idle_or_otag++;
1575 scb->flags |= SCB_ACTIVE;
1577 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1578 scb->flags |= SCB_UNTAGGEDQ;
1580 ahc_queue_scb(ahc, scb);
1585 * SCSI controller interrupt handler.
1588 ahc_linux_isr(int irq, void *dev_id)
1590 struct ahc_softc *ahc;
1594 ahc = (struct ahc_softc *) dev_id;
1595 ahc_lock(ahc, &flags);
1596 ours = ahc_intr(ahc);
1597 ahc_unlock(ahc, &flags);
1598 return IRQ_RETVAL(ours);
1602 ahc_platform_flushwork(struct ahc_softc *ahc)
1608 ahc_send_async(struct ahc_softc *ahc, char channel,
1609 u_int target, u_int lun, ac_code code)
1612 case AC_TRANSFER_NEG:
1614 struct scsi_target *starget;
1615 struct ahc_linux_target *targ;
1616 struct ahc_initiator_tinfo *tinfo;
1617 struct ahc_tmode_tstate *tstate;
1619 unsigned int target_ppr_options;
1621 BUG_ON(target == CAM_TARGET_WILDCARD);
1623 tinfo = ahc_fetch_transinfo(ahc, channel,
1624 channel == 'A' ? ahc->our_id
1629 * Don't bother reporting results while
1630 * negotiations are still pending.
1632 if (tinfo->curr.period != tinfo->goal.period
1633 || tinfo->curr.width != tinfo->goal.width
1634 || tinfo->curr.offset != tinfo->goal.offset
1635 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1636 if (bootverbose == 0)
1640 * Don't bother reporting results that
1641 * are identical to those last reported.
1643 target_offset = target;
1646 starget = ahc->platform_data->starget[target_offset];
1647 if (starget == NULL)
1649 targ = scsi_transport_target_data(starget);
1651 target_ppr_options =
1652 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1653 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1654 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1656 if (tinfo->curr.period == spi_period(starget)
1657 && tinfo->curr.width == spi_width(starget)
1658 && tinfo->curr.offset == spi_offset(starget)
1659 && tinfo->curr.ppr_options == target_ppr_options)
1660 if (bootverbose == 0)
1663 spi_period(starget) = tinfo->curr.period;
1664 spi_width(starget) = tinfo->curr.width;
1665 spi_offset(starget) = tinfo->curr.offset;
1666 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1667 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1668 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1669 spi_display_xfer_agreement(starget);
1674 WARN_ON(lun != CAM_LUN_WILDCARD);
1675 scsi_report_device_reset(ahc->platform_data->host,
1676 channel - 'A', target);
1680 if (ahc->platform_data->host != NULL) {
1681 scsi_report_bus_reset(ahc->platform_data->host,
1686 panic("ahc_send_async: Unexpected async event");
1691 * Calls the higher level scsi done function and frees the scb.
1694 ahc_done(struct ahc_softc *ahc, struct scb *scb)
1696 struct scsi_cmnd *cmd;
1697 struct ahc_linux_device *dev;
1699 LIST_REMOVE(scb, pending_links);
1700 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1701 struct scb_tailq *untagged_q;
1704 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1705 untagged_q = &(ahc->untagged_queues[target_offset]);
1706 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1707 BUG_ON(!TAILQ_EMPTY(untagged_q));
1708 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1710 * Transactions aborted from the untagged queue may
1711 * not have been dispatched to the controller, so
1712 * only check the SCB_ACTIVE flag for tagged transactions.
1714 printk("SCB %d done'd twice\n", scb->hscb->tag);
1715 ahc_dump_card_state(ahc);
1716 panic("Stopping for safety");
1719 dev = scb->platform_data->dev;
1722 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1723 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1726 ahc_linux_unmap_scb(ahc, scb);
1729 * Guard against stale sense data.
1730 * The Linux mid-layer assumes that sense
1731 * was retrieved anytime the first byte of
1732 * the sense buffer looks "sane".
1734 cmd->sense_buffer[0] = 0;
1735 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1736 uint32_t amount_xferred;
1739 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1740 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1742 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1743 ahc_print_path(ahc, scb);
1744 printk("Set CAM_UNCOR_PARITY\n");
1747 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1748 #ifdef AHC_REPORT_UNDERFLOWS
1750 * This code is disabled by default as some
1751 * clients of the SCSI system do not properly
1752 * initialize the underflow parameter. This
1753 * results in spurious termination of commands
1754 * that complete as expected (e.g. underflow is
1755 * allowed as command can return variable amounts
1758 } else if (amount_xferred < scb->io_ctx->underflow) {
1761 ahc_print_path(ahc, scb);
1763 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1764 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1766 ahc_print_path(ahc, scb);
1767 printk("Saw underflow (%ld of %ld bytes). "
1768 "Treated as error\n",
1769 ahc_get_residual(scb),
1770 ahc_get_transfer_length(scb));
1771 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1774 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1776 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1777 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1780 if (dev->openings == 1
1781 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1782 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1783 dev->tag_success_count++;
1785 * Some devices deal with temporary internal resource
1786 * shortages by returning queue full. When the queue
1787 * full occurrs, we throttle back. Slowly try to get
1788 * back to our previous queue depth.
1790 if ((dev->openings + dev->active) < dev->maxtags
1791 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1792 dev->tag_success_count = 0;
1796 if (dev->active == 0)
1797 dev->commands_since_idle_or_otag = 0;
1799 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1800 printk("Recovery SCB completes\n");
1801 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1802 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1803 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1805 if (ahc->platform_data->eh_done)
1806 complete(ahc->platform_data->eh_done);
1809 ahc_free_scb(ahc, scb);
1810 ahc_linux_queue_cmd_complete(ahc, cmd);
1814 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
1815 struct scsi_device *sdev, struct scb *scb)
1817 struct ahc_devinfo devinfo;
1818 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1820 ahc_compile_devinfo(&devinfo,
1822 sdev->sdev_target->id, sdev->lun,
1823 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1827 * We don't currently trust the mid-layer to
1828 * properly deal with queue full or busy. So,
1829 * when one occurs, we tell the mid-layer to
1830 * unconditionally requeue the command to us
1831 * so that we can retry it ourselves. We also
1832 * implement our own throttling mechanism so
1833 * we don't clobber the device with too many
1836 switch (ahc_get_scsi_status(scb)) {
1839 case SCSI_STATUS_CHECK_COND:
1840 case SCSI_STATUS_CMD_TERMINATED:
1842 struct scsi_cmnd *cmd;
1845 * Copy sense information to the OS's cmd
1846 * structure if it is available.
1849 if (scb->flags & SCB_SENSE) {
1852 sense_size = min(sizeof(struct scsi_sense_data)
1853 - ahc_get_sense_residual(scb),
1854 (u_long)SCSI_SENSE_BUFFERSIZE);
1855 memcpy(cmd->sense_buffer,
1856 ahc_get_sense_buf(ahc, scb), sense_size);
1857 if (sense_size < SCSI_SENSE_BUFFERSIZE)
1858 memset(&cmd->sense_buffer[sense_size], 0,
1859 SCSI_SENSE_BUFFERSIZE - sense_size);
1860 cmd->result |= (DRIVER_SENSE << 24);
1862 if (ahc_debug & AHC_SHOW_SENSE) {
1865 printk("Copied %d bytes of sense data:",
1867 for (i = 0; i < sense_size; i++) {
1870 printk("0x%x ", cmd->sense_buffer[i]);
1878 case SCSI_STATUS_QUEUE_FULL:
1881 * By the time the core driver has returned this
1882 * command, all other commands that were queued
1883 * to us but not the device have been returned.
1884 * This ensures that dev->active is equal to
1885 * the number of commands actually queued to
1888 dev->tag_success_count = 0;
1889 if (dev->active != 0) {
1891 * Drop our opening count to the number
1892 * of commands currently outstanding.
1896 ahc_print_path(ahc, scb);
1897 printk("Dropping tag count to %d\n", dev->active);
1899 if (dev->active == dev->tags_on_last_queuefull) {
1901 dev->last_queuefull_same_count++;
1903 * If we repeatedly see a queue full
1904 * at the same queue depth, this
1905 * device has a fixed number of tag
1906 * slots. Lock in this tag depth
1907 * so we stop seeing queue fulls from
1910 if (dev->last_queuefull_same_count
1911 == AHC_LOCK_TAGS_COUNT) {
1912 dev->maxtags = dev->active;
1913 ahc_print_path(ahc, scb);
1914 printk("Locking max tag count at %d\n",
1918 dev->tags_on_last_queuefull = dev->active;
1919 dev->last_queuefull_same_count = 0;
1921 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1922 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
1923 ahc_platform_set_tags(ahc, sdev, &devinfo,
1924 (dev->flags & AHC_DEV_Q_BASIC)
1925 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1929 * Drop down to a single opening, and treat this
1930 * as if the target returned BUSY SCSI status.
1933 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
1934 ahc_platform_set_tags(ahc, sdev, &devinfo,
1935 (dev->flags & AHC_DEV_Q_BASIC)
1936 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1943 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1946 * Map CAM error codes into Linux Error codes. We
1947 * avoid the conversion so that the DV code has the
1948 * full error information available when making
1949 * state change decisions.
1954 switch (ahc_cmd_get_transaction_status(cmd)) {
1955 case CAM_REQ_INPROG:
1957 case CAM_SCSI_STATUS_ERROR:
1958 new_status = DID_OK;
1960 case CAM_REQ_ABORTED:
1961 new_status = DID_ABORT;
1964 new_status = DID_BUS_BUSY;
1966 case CAM_REQ_INVALID:
1967 case CAM_PATH_INVALID:
1968 new_status = DID_BAD_TARGET;
1970 case CAM_SEL_TIMEOUT:
1971 new_status = DID_NO_CONNECT;
1973 case CAM_SCSI_BUS_RESET:
1975 new_status = DID_RESET;
1977 case CAM_UNCOR_PARITY:
1978 new_status = DID_PARITY;
1980 case CAM_CMD_TIMEOUT:
1981 new_status = DID_TIME_OUT;
1984 case CAM_REQ_CMP_ERR:
1985 case CAM_AUTOSENSE_FAIL:
1987 case CAM_DATA_RUN_ERR:
1988 case CAM_UNEXP_BUSFREE:
1989 case CAM_SEQUENCE_FAIL:
1990 case CAM_CCB_LEN_ERR:
1991 case CAM_PROVIDE_FAIL:
1992 case CAM_REQ_TERMIO:
1993 case CAM_UNREC_HBA_ERROR:
1994 case CAM_REQ_TOO_BIG:
1995 new_status = DID_ERROR;
1997 case CAM_REQUEUE_REQ:
1998 new_status = DID_REQUEUE;
2001 /* We should never get here */
2002 new_status = DID_ERROR;
2006 ahc_cmd_set_transaction_status(cmd, new_status);
2009 cmd->scsi_done(cmd);
2013 ahc_linux_freeze_simq(struct ahc_softc *ahc)
2018 ahc->platform_data->qfrozen++;
2019 if (ahc->platform_data->qfrozen == 1) {
2020 scsi_block_requests(ahc->platform_data->host);
2022 /* XXX What about Twin channels? */
2023 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2024 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2025 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2027 ahc_unlock(ahc, &s);
2031 ahc_linux_release_simq(struct ahc_softc *ahc)
2038 if (ahc->platform_data->qfrozen > 0)
2039 ahc->platform_data->qfrozen--;
2040 if (ahc->platform_data->qfrozen == 0)
2042 ahc_unlock(ahc, &s);
2044 * There is still a race here. The mid-layer
2045 * should keep its own freeze count and use
2046 * a bottom half handler to run the queues
2047 * so we can unblock with our own lock held.
2050 scsi_unblock_requests(ahc->platform_data->host);
2054 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2056 struct ahc_softc *ahc;
2057 struct ahc_linux_device *dev;
2058 struct scb *pending_scb;
2060 u_int active_scb_index;
2069 unsigned long flags;
2074 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2076 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
2077 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2080 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2081 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2084 ahc_lock(ahc, &flags);
2087 * First determine if we currently own this command.
2088 * Start by searching the device queue. If not found
2089 * there, check the pending_scb list. If not found
2090 * at all, and the system wanted us to just abort the
2091 * command, return success.
2093 dev = scsi_transport_device_data(cmd->device);
2097 * No target device for this command exists,
2098 * so we must not still own the command.
2100 printk("%s:%d:%d:%d: Is not an active device\n",
2101 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2102 (u8)cmd->device->lun);
2107 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2108 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2109 cmd->device->channel + 'A',
2110 (u8)cmd->device->lun,
2111 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2112 printk("%s:%d:%d:%d: Command found on untagged queue\n",
2113 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2114 (u8)cmd->device->lun);
2120 * See if we can find a matching cmd in the pending list.
2122 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2123 if (pending_scb->io_ctx == cmd)
2127 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2129 /* Any SCB for this device will do for a target reset */
2130 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2131 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2132 scmd_channel(cmd) + 'A',
2134 SCB_LIST_NULL, ROLE_INITIATOR))
2139 if (pending_scb == NULL) {
2140 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2144 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2146 * We can't queue two recovery actions using the same SCB
2153 * Ensure that the card doesn't do anything
2154 * behind our back and that we didn't "just" miss
2155 * an interrupt that would affect this cmd.
2157 was_paused = ahc_is_paused(ahc);
2158 ahc_pause_and_flushwork(ahc);
2161 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2162 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2166 printk("%s: At time of recovery, card was %spaused\n",
2167 ahc_name(ahc), was_paused ? "" : "not ");
2168 ahc_dump_card_state(ahc);
2170 disconnected = TRUE;
2171 if (flag == SCB_ABORT) {
2172 if (ahc_search_qinfifo(ahc, cmd->device->id,
2173 cmd->device->channel + 'A',
2175 pending_scb->hscb->tag,
2176 ROLE_INITIATOR, CAM_REQ_ABORTED,
2177 SEARCH_COMPLETE) > 0) {
2178 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2179 ahc_name(ahc), cmd->device->channel,
2180 cmd->device->id, (u8)cmd->device->lun);
2184 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2185 cmd->device->channel + 'A',
2187 pending_scb->hscb->tag,
2188 ROLE_INITIATOR, /*status*/0,
2189 SEARCH_COUNT) > 0) {
2190 disconnected = FALSE;
2193 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2194 struct scb *bus_scb;
2196 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2197 if (bus_scb == pending_scb)
2198 disconnected = FALSE;
2199 else if (flag != SCB_ABORT
2200 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2201 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2202 disconnected = FALSE;
2206 * At this point, pending_scb is the scb associated with the
2207 * passed in command. That command is currently active on the
2208 * bus, is in the disconnected state, or we're hoping to find
2209 * a command for the same target active on the bus to abuse to
2210 * send a BDR. Queue the appropriate message based on which of
2211 * these states we are in.
2213 last_phase = ahc_inb(ahc, LASTPHASE);
2214 saved_scbptr = ahc_inb(ahc, SCBPTR);
2215 active_scb_index = ahc_inb(ahc, SCB_TAG);
2216 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2217 if (last_phase != P_BUSFREE
2218 && (pending_scb->hscb->tag == active_scb_index
2219 || (flag == SCB_DEVICE_RESET
2220 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
2223 * We're active on the bus, so assert ATN
2224 * and hope that the target responds.
2226 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2227 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2228 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2229 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2230 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2232 } else if (disconnected) {
2235 * Actually re-queue this SCB in an attempt
2236 * to select the device before it reconnects.
2237 * In either case (selection or reselection),
2238 * we will now issue the approprate message
2239 * to the timed-out device.
2241 * Set the MK_MESSAGE control bit indicating
2242 * that we desire to send a message. We
2243 * also set the disconnected flag since
2244 * in the paging case there is no guarantee
2245 * that our SCB control byte matches the
2246 * version on the card. We don't want the
2247 * sequencer to abort the command thinking
2248 * an unsolicited reselection occurred.
2250 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2251 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2254 * Remove any cached copy of this SCB in the
2255 * disconnected list in preparation for the
2256 * queuing of our abort SCB. We use the
2257 * same element in the SCB, SCB_NEXT, for
2258 * both the qinfifo and the disconnected list.
2260 ahc_search_disc_list(ahc, cmd->device->id,
2261 cmd->device->channel + 'A',
2262 cmd->device->lun, pending_scb->hscb->tag,
2263 /*stop_on_first*/TRUE,
2265 /*save_state*/FALSE);
2268 * In the non-paging case, the sequencer will
2269 * never re-reference the in-core SCB.
2270 * To make sure we are notified during
2271 * reselection, set the MK_MESSAGE flag in
2272 * the card's copy of the SCB.
2274 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2275 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2276 ahc_outb(ahc, SCB_CONTROL,
2277 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2281 * Clear out any entries in the QINFIFO first
2282 * so we are the next SCB for this target
2285 ahc_search_qinfifo(ahc, cmd->device->id,
2286 cmd->device->channel + 'A',
2287 cmd->device->lun, SCB_LIST_NULL,
2288 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2290 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2291 ahc_outb(ahc, SCBPTR, saved_scbptr);
2292 ahc_print_path(ahc, pending_scb);
2293 printk("Device is disconnected, re-queuing SCB\n");
2296 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2303 * Our assumption is that if we don't have the command, no
2304 * recovery action was required, so we return success. Again,
2305 * the semantics of the mid-layer recovery engine are not
2306 * well defined, so this may change in time.
2313 DECLARE_COMPLETION_ONSTACK(done);
2315 ahc->platform_data->eh_done = &done;
2316 ahc_unlock(ahc, &flags);
2318 printk("Recovery code sleeping\n");
2319 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2320 ahc_lock(ahc, &flags);
2321 ahc->platform_data->eh_done = NULL;
2322 ahc_unlock(ahc, &flags);
2324 printk("Timer Expired\n");
2327 printk("Recovery code awake\n");
2329 ahc_unlock(ahc, &flags);
2334 ahc_platform_dump_card_state(struct ahc_softc *ahc)
2338 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2340 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2341 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2342 struct ahc_devinfo devinfo;
2343 unsigned long flags;
2345 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2346 starget->channel + 'A', ROLE_INITIATOR);
2347 ahc_lock(ahc, &flags);
2348 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2349 ahc_unlock(ahc, &flags);
2352 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2354 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2355 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2356 struct ahc_tmode_tstate *tstate;
2357 struct ahc_initiator_tinfo *tinfo
2358 = ahc_fetch_transinfo(ahc,
2359 starget->channel + 'A',
2360 shost->this_id, starget->id, &tstate);
2361 struct ahc_devinfo devinfo;
2362 unsigned int ppr_options = tinfo->goal.ppr_options;
2363 unsigned long flags;
2364 unsigned long offset = tinfo->goal.offset;
2365 const struct ahc_syncrate *syncrate;
2368 offset = MAX_OFFSET;
2371 period = 9; /* 12.5ns is our minimum */
2373 if (spi_max_width(starget))
2374 ppr_options |= MSG_EXT_PPR_DT_REQ;
2376 /* need wide for DT and need DT for 12.5 ns */
2380 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2381 starget->channel + 'A', ROLE_INITIATOR);
2383 /* all PPR requests apart from QAS require wide transfers */
2384 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2385 if (spi_width(starget) == 0)
2386 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2389 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2390 ahc_lock(ahc, &flags);
2391 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2392 ppr_options, AHC_TRANS_GOAL, FALSE);
2393 ahc_unlock(ahc, &flags);
2396 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2398 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2399 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2400 struct ahc_tmode_tstate *tstate;
2401 struct ahc_initiator_tinfo *tinfo
2402 = ahc_fetch_transinfo(ahc,
2403 starget->channel + 'A',
2404 shost->this_id, starget->id, &tstate);
2405 struct ahc_devinfo devinfo;
2406 unsigned int ppr_options = 0;
2407 unsigned int period = 0;
2408 unsigned long flags;
2409 const struct ahc_syncrate *syncrate = NULL;
2411 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2412 starget->channel + 'A', ROLE_INITIATOR);
2414 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2415 period = tinfo->goal.period;
2416 ppr_options = tinfo->goal.ppr_options;
2418 ahc_lock(ahc, &flags);
2419 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2420 ppr_options, AHC_TRANS_GOAL, FALSE);
2421 ahc_unlock(ahc, &flags);
2424 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2426 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2427 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2428 struct ahc_tmode_tstate *tstate;
2429 struct ahc_initiator_tinfo *tinfo
2430 = ahc_fetch_transinfo(ahc,
2431 starget->channel + 'A',
2432 shost->this_id, starget->id, &tstate);
2433 struct ahc_devinfo devinfo;
2434 unsigned int ppr_options = tinfo->goal.ppr_options
2435 & ~MSG_EXT_PPR_DT_REQ;
2436 unsigned int period = tinfo->goal.period;
2437 unsigned int width = tinfo->goal.width;
2438 unsigned long flags;
2439 const struct ahc_syncrate *syncrate;
2441 if (dt && spi_max_width(starget)) {
2442 ppr_options |= MSG_EXT_PPR_DT_REQ;
2444 ahc_linux_set_width(starget, 1);
2445 } else if (period == 9)
2446 period = 10; /* if resetting DT, period must be >= 25ns */
2448 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2449 starget->channel + 'A', ROLE_INITIATOR);
2450 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
2451 ahc_lock(ahc, &flags);
2452 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2453 ppr_options, AHC_TRANS_GOAL, FALSE);
2454 ahc_unlock(ahc, &flags);
2458 /* FIXME: This code claims to support IU and QAS. However, the actual
2459 * sequencer code and aic7xxx_core have no support for these parameters and
2460 * will get into a bad state if they're negotiated. Do not enable this
2461 * unless you know what you're doing */
2462 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2464 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2465 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2466 struct ahc_tmode_tstate *tstate;
2467 struct ahc_initiator_tinfo *tinfo
2468 = ahc_fetch_transinfo(ahc,
2469 starget->channel + 'A',
2470 shost->this_id, starget->id, &tstate);
2471 struct ahc_devinfo devinfo;
2472 unsigned int ppr_options = tinfo->goal.ppr_options
2473 & ~MSG_EXT_PPR_QAS_REQ;
2474 unsigned int period = tinfo->goal.period;
2475 unsigned long flags;
2476 struct ahc_syncrate *syncrate;
2479 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2481 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2482 starget->channel + 'A', ROLE_INITIATOR);
2483 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2484 ahc_lock(ahc, &flags);
2485 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2486 ppr_options, AHC_TRANS_GOAL, FALSE);
2487 ahc_unlock(ahc, &flags);
2490 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2492 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2493 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2494 struct ahc_tmode_tstate *tstate;
2495 struct ahc_initiator_tinfo *tinfo
2496 = ahc_fetch_transinfo(ahc,
2497 starget->channel + 'A',
2498 shost->this_id, starget->id, &tstate);
2499 struct ahc_devinfo devinfo;
2500 unsigned int ppr_options = tinfo->goal.ppr_options
2501 & ~MSG_EXT_PPR_IU_REQ;
2502 unsigned int period = tinfo->goal.period;
2503 unsigned long flags;
2504 struct ahc_syncrate *syncrate;
2507 ppr_options |= MSG_EXT_PPR_IU_REQ;
2509 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2510 starget->channel + 'A', ROLE_INITIATOR);
2511 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2512 ahc_lock(ahc, &flags);
2513 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2514 ppr_options, AHC_TRANS_GOAL, FALSE);
2515 ahc_unlock(ahc, &flags);
2519 static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2521 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
2522 unsigned long flags;
2525 if (!(ahc->features & AHC_ULTRA2)) {
2526 /* non-LVD chipset, may not have SBLKCTL reg */
2527 spi_signalling(shost) =
2528 ahc->features & AHC_HVD ?
2534 ahc_lock(ahc, &flags);
2536 mode = ahc_inb(ahc, SBLKCTL);
2538 ahc_unlock(ahc, &flags);
2541 spi_signalling(shost) = SPI_SIGNAL_LVD;
2542 else if (mode & ENAB20)
2543 spi_signalling(shost) = SPI_SIGNAL_SE;
2545 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2548 static struct spi_function_template ahc_linux_transport_functions = {
2549 .set_offset = ahc_linux_set_offset,
2551 .set_period = ahc_linux_set_period,
2553 .set_width = ahc_linux_set_width,
2555 .set_dt = ahc_linux_set_dt,
2558 .set_iu = ahc_linux_set_iu,
2560 .set_qas = ahc_linux_set_qas,
2563 .get_signalling = ahc_linux_get_signalling,
2569 ahc_linux_init(void)
2572 * If we've been passed any parameters, process them now.
2575 aic7xxx_setup(aic7xxx);
2577 ahc_linux_transport_template =
2578 spi_attach_transport(&ahc_linux_transport_functions);
2579 if (!ahc_linux_transport_template)
2582 scsi_transport_reserve_device(ahc_linux_transport_template,
2583 sizeof(struct ahc_linux_device));
2585 ahc_linux_pci_init();
2586 ahc_linux_eisa_init();
2591 ahc_linux_exit(void)
2593 ahc_linux_pci_exit();
2594 ahc_linux_eisa_exit();
2595 spi_release_transport(ahc_linux_transport_template);
2598 module_init(ahc_linux_init);
2599 module_exit(ahc_linux_exit);