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,
817 /**************************** Tasklet Handler *********************************/
819 /******************************** Macros **************************************/
820 #define BUILD_SCSIID(ahc, cmd) \
821 ((((cmd)->device->id << TID_SHIFT) & TID) \
822 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
823 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
825 /******************************** Bus DMA *************************************/
827 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
828 bus_size_t alignment, bus_size_t boundary,
829 dma_addr_t lowaddr, dma_addr_t highaddr,
830 bus_dma_filter_t *filter, void *filterarg,
831 bus_size_t maxsize, int nsegments,
832 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
836 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
841 * Linux is very simplistic about DMA memory. For now don't
842 * maintain all specification information. Once Linux supplies
843 * better facilities for doing these operations, or the
844 * needs of this particular driver change, we might need to do
847 dmat->alignment = alignment;
848 dmat->boundary = boundary;
849 dmat->maxsize = maxsize;
855 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
861 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
862 int flags, bus_dmamap_t *mapp)
864 *vaddr = pci_alloc_consistent(ahc->dev_softc,
865 dmat->maxsize, mapp);
872 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
873 void* vaddr, bus_dmamap_t map)
875 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
880 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
881 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
882 void *cb_arg, int flags)
885 * Assume for now that this will only be used during
886 * initialization and not for per-transaction buffer mapping.
888 bus_dma_segment_t stack_sg;
890 stack_sg.ds_addr = map;
891 stack_sg.ds_len = dmat->maxsize;
892 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
897 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
902 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
909 ahc_linux_setup_tag_info_global(char *p)
913 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
914 printk("Setting Global Tags= %d\n", tags);
916 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) {
917 for (j = 0; j < AHC_NUM_TARGETS; j++) {
918 aic7xxx_tag_info[i].tag_commands[j] = tags;
924 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
927 if ((instance >= 0) && (targ >= 0)
928 && (instance < ARRAY_SIZE(aic7xxx_tag_info))
929 && (targ < AHC_NUM_TARGETS)) {
930 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
932 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
937 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
938 void (*callback)(u_long, int, int, int32_t),
947 char tok_list[] = {'.', ',', '{', '}', '\0'};
949 /* All options use a ':' name/arg separator */
957 * Restore separator that may be in
958 * the middle of our option argument.
960 tok_end = strchr(opt_arg, '\0');
966 if (instance == -1) {
973 printk("Malformed Option %s\n",
983 else if (instance != -1)
993 else if (instance >= 0)
1002 for (i = 0; tok_list[i]; i++) {
1003 tok_end2 = strchr(opt_arg, tok_list[i]);
1004 if ((tok_end2) && (tok_end2 < tok_end))
1007 callback(callback_arg, instance, targ,
1008 simple_strtol(opt_arg, NULL, 0));
1017 * Handle Linux boot parameters. This routine allows for assigning a value
1018 * to a parameter with a ':' between the parameter and the value.
1019 * ie. aic7xxx=stpwlev:1,extended
1022 aic7xxx_setup(char *s)
1028 static const struct {
1032 { "extended", &aic7xxx_extended },
1033 { "no_reset", &aic7xxx_no_reset },
1034 { "verbose", &aic7xxx_verbose },
1035 { "allow_memio", &aic7xxx_allow_memio},
1037 { "debug", &ahc_debug },
1039 { "periodic_otag", &aic7xxx_periodic_otag },
1040 { "pci_parity", &aic7xxx_pci_parity },
1041 { "seltime", &aic7xxx_seltime },
1042 { "tag_info", NULL },
1043 { "global_tag_depth", NULL },
1047 end = strchr(s, '\0');
1050 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1051 * will never be 0 in this case.
1055 while ((p = strsep(&s, ",.")) != NULL) {
1058 for (i = 0; i < ARRAY_SIZE(options); i++) {
1060 n = strlen(options[i].name);
1061 if (strncmp(options[i].name, p, n) == 0)
1064 if (i == ARRAY_SIZE(options))
1067 if (strncmp(p, "global_tag_depth", n) == 0) {
1068 ahc_linux_setup_tag_info_global(p + n);
1069 } else if (strncmp(p, "tag_info", n) == 0) {
1070 s = ahc_parse_brace_option("tag_info", p + n, end,
1071 2, ahc_linux_setup_tag_info, 0);
1072 } else if (p[n] == ':') {
1073 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1074 } else if (strncmp(p, "verbose", n) == 0) {
1075 *(options[i].flag) = 1;
1077 *(options[i].flag) ^= 0xFFFFFFFF;
1083 __setup("aic7xxx=", aic7xxx_setup);
1085 uint32_t aic7xxx_verbose;
1088 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1091 struct Scsi_Host *host;
1096 template->name = ahc->description;
1097 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1101 *((struct ahc_softc **)host->hostdata) = ahc;
1102 ahc->platform_data->host = host;
1103 host->can_queue = AHC_MAX_QUEUE;
1104 host->cmd_per_lun = 2;
1105 /* XXX No way to communicate the ID for multiple channels */
1106 host->this_id = ahc->our_id;
1107 host->irq = ahc->platform_data->irq;
1108 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1109 host->max_lun = AHC_NUM_LUNS;
1110 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1111 host->sg_tablesize = AHC_NSEG;
1113 ahc_set_unit(ahc, ahc_linux_unit++);
1114 ahc_unlock(ahc, &s);
1115 sprintf(buf, "scsi%d", host->host_no);
1116 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1117 if (new_name != NULL) {
1118 strcpy(new_name, buf);
1119 ahc_set_name(ahc, new_name);
1121 host->unique_id = ahc->unit;
1122 ahc_linux_initialize_scsi_bus(ahc);
1123 ahc_intr_enable(ahc, TRUE);
1125 host->transportt = ahc_linux_transport_template;
1127 retval = scsi_add_host(host,
1128 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1130 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1131 scsi_host_put(host);
1135 scsi_scan_host(host);
1140 * Place the SCSI bus into a known state by either resetting it,
1141 * or forcing transfer negotiations on the next command to any
1145 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1156 if (aic7xxx_no_reset != 0)
1157 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1159 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1160 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1162 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1164 if ((ahc->features & AHC_TWIN) != 0) {
1166 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1167 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1176 * Force negotiation to async for all targets that
1177 * will not see an initial bus reset.
1179 for (; i < numtarg; i++) {
1180 struct ahc_devinfo devinfo;
1181 struct ahc_initiator_tinfo *tinfo;
1182 struct ahc_tmode_tstate *tstate;
1188 our_id = ahc->our_id;
1190 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1192 our_id = ahc->our_id_b;
1195 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1196 target_id, &tstate);
1197 ahc_compile_devinfo(&devinfo, our_id, target_id,
1198 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1199 ahc_update_neg_request(ahc, &devinfo, tstate,
1200 tinfo, AHC_NEG_ALWAYS);
1202 ahc_unlock(ahc, &s);
1203 /* Give the bus some time to recover */
1204 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1205 ahc_linux_freeze_simq(ahc);
1206 msleep(AIC7XXX_RESET_DELAY);
1207 ahc_linux_release_simq(ahc);
1212 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1215 ahc->platform_data =
1216 kmalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC);
1217 if (ahc->platform_data == NULL)
1219 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1220 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1222 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1223 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1224 if (aic7xxx_pci_parity == 0)
1225 ahc->flags |= AHC_DISABLE_PCI_PERR;
1231 ahc_platform_free(struct ahc_softc *ahc)
1233 struct scsi_target *starget;
1236 if (ahc->platform_data != NULL) {
1237 /* destroy all of the device and target objects */
1238 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1239 starget = ahc->platform_data->starget[i];
1240 if (starget != NULL) {
1241 ahc->platform_data->starget[i] = NULL;
1245 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1246 free_irq(ahc->platform_data->irq, ahc);
1247 if (ahc->tag == BUS_SPACE_PIO
1248 && ahc->bsh.ioport != 0)
1249 release_region(ahc->bsh.ioport, 256);
1250 if (ahc->tag == BUS_SPACE_MEMIO
1251 && ahc->bsh.maddr != NULL) {
1252 iounmap(ahc->bsh.maddr);
1253 release_mem_region(ahc->platform_data->mem_busaddr,
1257 if (ahc->platform_data->host)
1258 scsi_host_put(ahc->platform_data->host);
1260 kfree(ahc->platform_data);
1265 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1267 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1268 SCB_GET_CHANNEL(ahc, scb),
1269 SCB_GET_LUN(scb), SCB_LIST_NULL,
1270 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1274 ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev,
1275 struct ahc_devinfo *devinfo, ahc_queue_alg alg)
1277 struct ahc_linux_device *dev;
1283 dev = scsi_transport_device_data(sdev);
1285 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1288 case AHC_QUEUE_NONE:
1291 case AHC_QUEUE_BASIC:
1292 now_queuing = AHC_DEV_Q_BASIC;
1294 case AHC_QUEUE_TAGGED:
1295 now_queuing = AHC_DEV_Q_TAGGED;
1298 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1299 && (was_queuing != now_queuing)
1300 && (dev->active != 0)) {
1301 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1305 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1309 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1312 * Start out aggressively and allow our
1313 * dynamic queue depth algorithm to take
1316 dev->maxtags = usertags;
1317 dev->openings = dev->maxtags - dev->active;
1319 if (dev->maxtags == 0) {
1321 * Queueing is disabled by the user.
1324 } else if (alg == AHC_QUEUE_TAGGED) {
1325 dev->flags |= AHC_DEV_Q_TAGGED;
1326 if (aic7xxx_periodic_otag != 0)
1327 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1329 dev->flags |= AHC_DEV_Q_BASIC;
1331 /* We can only have one opening. */
1333 dev->openings = 1 - dev->active;
1335 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1336 case AHC_DEV_Q_BASIC:
1337 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1338 scsi_activate_tcq(sdev, dev->openings + dev->active);
1340 case AHC_DEV_Q_TAGGED:
1341 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
1342 scsi_activate_tcq(sdev, dev->openings + dev->active);
1346 * We allow the OS to queue 2 untagged transactions to
1347 * us at any time even though we can only execute them
1348 * serially on the controller/device. This should
1349 * remove some latency.
1351 scsi_deactivate_tcq(sdev, 2);
1357 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1358 int lun, u_int tag, role_t role, uint32_t status)
1364 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1366 static int warned_user;
1370 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1371 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) {
1372 if (warned_user == 0) {
1375 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1376 "aic7xxx: for installed controllers. Using defaults\n"
1377 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1378 "aic7xxx: the aic7xxx_osm..c source file.\n");
1381 tags = AHC_MAX_QUEUE;
1383 adapter_tag_info_t *tag_info;
1385 tag_info = &aic7xxx_tag_info[ahc->unit];
1386 tags = tag_info->tag_commands[devinfo->target_offset];
1387 if (tags > AHC_MAX_QUEUE)
1388 tags = AHC_MAX_QUEUE;
1395 * Determines the queue depth for a given device.
1398 ahc_linux_device_queue_depth(struct scsi_device *sdev)
1400 struct ahc_devinfo devinfo;
1402 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1404 ahc_compile_devinfo(&devinfo,
1405 sdev->sdev_target->channel == 0
1406 ? ahc->our_id : ahc->our_id_b,
1407 sdev->sdev_target->id, sdev->lun,
1408 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1410 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1411 if (tags != 0 && sdev->tagged_supported != 0) {
1413 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED);
1414 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1415 devinfo.lun, AC_TRANSFER_NEG);
1416 ahc_print_devinfo(ahc, &devinfo);
1417 printk("Tagged Queuing enabled. Depth %d\n", tags);
1419 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE);
1420 ahc_send_async(ahc, devinfo.channel, devinfo.target,
1421 devinfo.lun, AC_TRANSFER_NEG);
1426 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1427 struct scsi_cmnd *cmd)
1430 struct hardware_scb *hscb;
1431 struct ahc_initiator_tinfo *tinfo;
1432 struct ahc_tmode_tstate *tstate;
1434 struct scb_tailq *untagged_q = NULL;
1438 * Schedule us to run later. The only reason we are not
1439 * running is because the whole controller Q is frozen.
1441 if (ahc->platform_data->qfrozen != 0)
1442 return SCSI_MLQUEUE_HOST_BUSY;
1445 * We only allow one untagged transaction
1446 * per target in the initiator role unless
1447 * we are storing a full busy target *lun*
1448 * table in SCB space.
1450 if (!blk_rq_tagged(cmd->request)
1451 && (ahc->features & AHC_SCB_BTT) == 0) {
1454 target_offset = cmd->device->id + cmd->device->channel * 8;
1455 untagged_q = &(ahc->untagged_queues[target_offset]);
1456 if (!TAILQ_EMPTY(untagged_q))
1457 /* if we're already executing an untagged command
1458 * we're busy to another */
1459 return SCSI_MLQUEUE_DEVICE_BUSY;
1462 nseg = scsi_dma_map(cmd);
1464 return SCSI_MLQUEUE_HOST_BUSY;
1467 * Get an scb to use.
1469 scb = ahc_get_scb(ahc);
1471 scsi_dma_unmap(cmd);
1472 return SCSI_MLQUEUE_HOST_BUSY;
1476 scb->platform_data->dev = dev;
1478 cmd->host_scribble = (char *)scb;
1481 * Fill out basics of the HSCB.
1484 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1485 hscb->lun = cmd->device->lun;
1486 mask = SCB_GET_TARGET_MASK(ahc, scb);
1487 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1488 SCB_GET_OUR_ID(scb),
1489 SCB_GET_TARGET(ahc, scb), &tstate);
1490 hscb->scsirate = tinfo->scsirate;
1491 hscb->scsioffset = tinfo->curr.offset;
1492 if ((tstate->ultraenb & mask) != 0)
1493 hscb->control |= ULTRAENB;
1495 if ((ahc->user_discenable & mask) != 0)
1496 hscb->control |= DISCENB;
1498 if ((tstate->auto_negotiate & mask) != 0) {
1499 scb->flags |= SCB_AUTO_NEGOTIATE;
1500 scb->hscb->control |= MK_MESSAGE;
1503 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1505 uint8_t tag_msgs[2];
1507 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1508 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1509 hscb->control |= tag_msgs[0];
1510 if (tag_msgs[0] == MSG_ORDERED_TASK)
1511 dev->commands_since_idle_or_otag = 0;
1512 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1513 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1514 hscb->control |= MSG_ORDERED_TASK;
1515 dev->commands_since_idle_or_otag = 0;
1517 hscb->control |= MSG_SIMPLE_TASK;
1521 hscb->cdb_len = cmd->cmd_len;
1522 if (hscb->cdb_len <= 12) {
1523 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1525 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1526 scb->flags |= SCB_CDB32_PTR;
1529 scb->platform_data->xfer_len = 0;
1530 ahc_set_residual(scb, 0);
1531 ahc_set_sense_residual(scb, 0);
1535 struct ahc_dma_seg *sg;
1536 struct scatterlist *cur_seg;
1539 /* Copy the segments into the SG list. */
1542 * The sg_count may be larger than nseg if
1543 * a transfer crosses a 32bit page.
1545 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1550 addr = sg_dma_address(cur_seg);
1551 len = sg_dma_len(cur_seg);
1552 consumed = ahc_linux_map_seg(ahc, scb,
1555 scb->sg_count += consumed;
1558 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1561 * Reset the sg list pointer.
1564 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1567 * Copy the first SG into the "current"
1568 * data pointer area.
1570 scb->hscb->dataptr = scb->sg_list->addr;
1571 scb->hscb->datacnt = scb->sg_list->len;
1573 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1574 scb->hscb->dataptr = 0;
1575 scb->hscb->datacnt = 0;
1579 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1582 dev->commands_issued++;
1583 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1584 dev->commands_since_idle_or_otag++;
1586 scb->flags |= SCB_ACTIVE;
1588 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1589 scb->flags |= SCB_UNTAGGEDQ;
1591 ahc_queue_scb(ahc, scb);
1596 * SCSI controller interrupt handler.
1599 ahc_linux_isr(int irq, void *dev_id)
1601 struct ahc_softc *ahc;
1605 ahc = (struct ahc_softc *) dev_id;
1606 ahc_lock(ahc, &flags);
1607 ours = ahc_intr(ahc);
1608 ahc_unlock(ahc, &flags);
1609 return IRQ_RETVAL(ours);
1613 ahc_platform_flushwork(struct ahc_softc *ahc)
1619 ahc_send_async(struct ahc_softc *ahc, char channel,
1620 u_int target, u_int lun, ac_code code)
1623 case AC_TRANSFER_NEG:
1625 struct scsi_target *starget;
1626 struct ahc_linux_target *targ;
1627 struct ahc_initiator_tinfo *tinfo;
1628 struct ahc_tmode_tstate *tstate;
1630 unsigned int target_ppr_options;
1632 BUG_ON(target == CAM_TARGET_WILDCARD);
1634 tinfo = ahc_fetch_transinfo(ahc, channel,
1635 channel == 'A' ? ahc->our_id
1640 * Don't bother reporting results while
1641 * negotiations are still pending.
1643 if (tinfo->curr.period != tinfo->goal.period
1644 || tinfo->curr.width != tinfo->goal.width
1645 || tinfo->curr.offset != tinfo->goal.offset
1646 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1647 if (bootverbose == 0)
1651 * Don't bother reporting results that
1652 * are identical to those last reported.
1654 target_offset = target;
1657 starget = ahc->platform_data->starget[target_offset];
1658 if (starget == NULL)
1660 targ = scsi_transport_target_data(starget);
1662 target_ppr_options =
1663 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1664 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1665 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1667 if (tinfo->curr.period == spi_period(starget)
1668 && tinfo->curr.width == spi_width(starget)
1669 && tinfo->curr.offset == spi_offset(starget)
1670 && tinfo->curr.ppr_options == target_ppr_options)
1671 if (bootverbose == 0)
1674 spi_period(starget) = tinfo->curr.period;
1675 spi_width(starget) = tinfo->curr.width;
1676 spi_offset(starget) = tinfo->curr.offset;
1677 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1678 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1679 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1680 spi_display_xfer_agreement(starget);
1685 WARN_ON(lun != CAM_LUN_WILDCARD);
1686 scsi_report_device_reset(ahc->platform_data->host,
1687 channel - 'A', target);
1691 if (ahc->platform_data->host != NULL) {
1692 scsi_report_bus_reset(ahc->platform_data->host,
1697 panic("ahc_send_async: Unexpected async event");
1702 * Calls the higher level scsi done function and frees the scb.
1705 ahc_done(struct ahc_softc *ahc, struct scb *scb)
1707 struct scsi_cmnd *cmd;
1708 struct ahc_linux_device *dev;
1710 LIST_REMOVE(scb, pending_links);
1711 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1712 struct scb_tailq *untagged_q;
1715 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1716 untagged_q = &(ahc->untagged_queues[target_offset]);
1717 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1718 BUG_ON(!TAILQ_EMPTY(untagged_q));
1719 } else if ((scb->flags & SCB_ACTIVE) == 0) {
1721 * Transactions aborted from the untagged queue may
1722 * not have been dispatched to the controller, so
1723 * only check the SCB_ACTIVE flag for tagged transactions.
1725 printk("SCB %d done'd twice\n", scb->hscb->tag);
1726 ahc_dump_card_state(ahc);
1727 panic("Stopping for safety");
1730 dev = scb->platform_data->dev;
1733 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1734 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1737 ahc_linux_unmap_scb(ahc, scb);
1740 * Guard against stale sense data.
1741 * The Linux mid-layer assumes that sense
1742 * was retrieved anytime the first byte of
1743 * the sense buffer looks "sane".
1745 cmd->sense_buffer[0] = 0;
1746 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1747 uint32_t amount_xferred;
1750 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1751 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1753 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1754 ahc_print_path(ahc, scb);
1755 printk("Set CAM_UNCOR_PARITY\n");
1758 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1759 #ifdef AHC_REPORT_UNDERFLOWS
1761 * This code is disabled by default as some
1762 * clients of the SCSI system do not properly
1763 * initialize the underflow parameter. This
1764 * results in spurious termination of commands
1765 * that complete as expected (e.g. underflow is
1766 * allowed as command can return variable amounts
1769 } else if (amount_xferred < scb->io_ctx->underflow) {
1772 ahc_print_path(ahc, scb);
1774 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1775 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1777 ahc_print_path(ahc, scb);
1778 printk("Saw underflow (%ld of %ld bytes). "
1779 "Treated as error\n",
1780 ahc_get_residual(scb),
1781 ahc_get_transfer_length(scb));
1782 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1785 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1787 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1788 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1791 if (dev->openings == 1
1792 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1793 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1794 dev->tag_success_count++;
1796 * Some devices deal with temporary internal resource
1797 * shortages by returning queue full. When the queue
1798 * full occurrs, we throttle back. Slowly try to get
1799 * back to our previous queue depth.
1801 if ((dev->openings + dev->active) < dev->maxtags
1802 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1803 dev->tag_success_count = 0;
1807 if (dev->active == 0)
1808 dev->commands_since_idle_or_otag = 0;
1810 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1811 printk("Recovery SCB completes\n");
1812 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1813 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1814 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1816 if (ahc->platform_data->eh_done)
1817 complete(ahc->platform_data->eh_done);
1820 ahc_free_scb(ahc, scb);
1821 ahc_linux_queue_cmd_complete(ahc, cmd);
1825 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
1826 struct scsi_device *sdev, struct scb *scb)
1828 struct ahc_devinfo devinfo;
1829 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1831 ahc_compile_devinfo(&devinfo,
1833 sdev->sdev_target->id, sdev->lun,
1834 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1838 * We don't currently trust the mid-layer to
1839 * properly deal with queue full or busy. So,
1840 * when one occurs, we tell the mid-layer to
1841 * unconditionally requeue the command to us
1842 * so that we can retry it ourselves. We also
1843 * implement our own throttling mechanism so
1844 * we don't clobber the device with too many
1847 switch (ahc_get_scsi_status(scb)) {
1850 case SCSI_STATUS_CHECK_COND:
1851 case SCSI_STATUS_CMD_TERMINATED:
1853 struct scsi_cmnd *cmd;
1856 * Copy sense information to the OS's cmd
1857 * structure if it is available.
1860 if (scb->flags & SCB_SENSE) {
1863 sense_size = min(sizeof(struct scsi_sense_data)
1864 - ahc_get_sense_residual(scb),
1865 (u_long)SCSI_SENSE_BUFFERSIZE);
1866 memcpy(cmd->sense_buffer,
1867 ahc_get_sense_buf(ahc, scb), sense_size);
1868 if (sense_size < SCSI_SENSE_BUFFERSIZE)
1869 memset(&cmd->sense_buffer[sense_size], 0,
1870 SCSI_SENSE_BUFFERSIZE - sense_size);
1871 cmd->result |= (DRIVER_SENSE << 24);
1873 if (ahc_debug & AHC_SHOW_SENSE) {
1876 printk("Copied %d bytes of sense data:",
1878 for (i = 0; i < sense_size; i++) {
1881 printk("0x%x ", cmd->sense_buffer[i]);
1889 case SCSI_STATUS_QUEUE_FULL:
1892 * By the time the core driver has returned this
1893 * command, all other commands that were queued
1894 * to us but not the device have been returned.
1895 * This ensures that dev->active is equal to
1896 * the number of commands actually queued to
1899 dev->tag_success_count = 0;
1900 if (dev->active != 0) {
1902 * Drop our opening count to the number
1903 * of commands currently outstanding.
1907 ahc_print_path(ahc, scb);
1908 printk("Dropping tag count to %d\n", dev->active);
1910 if (dev->active == dev->tags_on_last_queuefull) {
1912 dev->last_queuefull_same_count++;
1914 * If we repeatedly see a queue full
1915 * at the same queue depth, this
1916 * device has a fixed number of tag
1917 * slots. Lock in this tag depth
1918 * so we stop seeing queue fulls from
1921 if (dev->last_queuefull_same_count
1922 == AHC_LOCK_TAGS_COUNT) {
1923 dev->maxtags = dev->active;
1924 ahc_print_path(ahc, scb);
1925 printk("Locking max tag count at %d\n",
1929 dev->tags_on_last_queuefull = dev->active;
1930 dev->last_queuefull_same_count = 0;
1932 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1933 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
1934 ahc_platform_set_tags(ahc, sdev, &devinfo,
1935 (dev->flags & AHC_DEV_Q_BASIC)
1936 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1940 * Drop down to a single opening, and treat this
1941 * as if the target returned BUSY SCSI status.
1944 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
1945 ahc_platform_set_tags(ahc, sdev, &devinfo,
1946 (dev->flags & AHC_DEV_Q_BASIC)
1947 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1954 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1957 * Map CAM error codes into Linux Error codes. We
1958 * avoid the conversion so that the DV code has the
1959 * full error information available when making
1960 * state change decisions.
1965 switch (ahc_cmd_get_transaction_status(cmd)) {
1966 case CAM_REQ_INPROG:
1968 case CAM_SCSI_STATUS_ERROR:
1969 new_status = DID_OK;
1971 case CAM_REQ_ABORTED:
1972 new_status = DID_ABORT;
1975 new_status = DID_BUS_BUSY;
1977 case CAM_REQ_INVALID:
1978 case CAM_PATH_INVALID:
1979 new_status = DID_BAD_TARGET;
1981 case CAM_SEL_TIMEOUT:
1982 new_status = DID_NO_CONNECT;
1984 case CAM_SCSI_BUS_RESET:
1986 new_status = DID_RESET;
1988 case CAM_UNCOR_PARITY:
1989 new_status = DID_PARITY;
1991 case CAM_CMD_TIMEOUT:
1992 new_status = DID_TIME_OUT;
1995 case CAM_REQ_CMP_ERR:
1996 case CAM_AUTOSENSE_FAIL:
1998 case CAM_DATA_RUN_ERR:
1999 case CAM_UNEXP_BUSFREE:
2000 case CAM_SEQUENCE_FAIL:
2001 case CAM_CCB_LEN_ERR:
2002 case CAM_PROVIDE_FAIL:
2003 case CAM_REQ_TERMIO:
2004 case CAM_UNREC_HBA_ERROR:
2005 case CAM_REQ_TOO_BIG:
2006 new_status = DID_ERROR;
2008 case CAM_REQUEUE_REQ:
2009 new_status = DID_REQUEUE;
2012 /* We should never get here */
2013 new_status = DID_ERROR;
2017 ahc_cmd_set_transaction_status(cmd, new_status);
2020 cmd->scsi_done(cmd);
2024 ahc_linux_freeze_simq(struct ahc_softc *ahc)
2029 ahc->platform_data->qfrozen++;
2030 if (ahc->platform_data->qfrozen == 1) {
2031 scsi_block_requests(ahc->platform_data->host);
2033 /* XXX What about Twin channels? */
2034 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2035 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2036 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2038 ahc_unlock(ahc, &s);
2042 ahc_linux_release_simq(struct ahc_softc *ahc)
2049 if (ahc->platform_data->qfrozen > 0)
2050 ahc->platform_data->qfrozen--;
2051 if (ahc->platform_data->qfrozen == 0)
2053 ahc_unlock(ahc, &s);
2055 * There is still a race here. The mid-layer
2056 * should keep its own freeze count and use
2057 * a bottom half handler to run the queues
2058 * so we can unblock with our own lock held.
2061 scsi_unblock_requests(ahc->platform_data->host);
2065 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2067 struct ahc_softc *ahc;
2068 struct ahc_linux_device *dev;
2069 struct scb *pending_scb;
2071 u_int active_scb_index;
2080 unsigned long flags;
2085 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2087 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
2088 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2091 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2092 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2095 ahc_lock(ahc, &flags);
2098 * First determine if we currently own this command.
2099 * Start by searching the device queue. If not found
2100 * there, check the pending_scb list. If not found
2101 * at all, and the system wanted us to just abort the
2102 * command, return success.
2104 dev = scsi_transport_device_data(cmd->device);
2108 * No target device for this command exists,
2109 * so we must not still own the command.
2111 printk("%s:%d:%d:%d: Is not an active device\n",
2112 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2113 (u8)cmd->device->lun);
2118 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2119 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2120 cmd->device->channel + 'A',
2121 (u8)cmd->device->lun,
2122 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2123 printk("%s:%d:%d:%d: Command found on untagged queue\n",
2124 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2125 (u8)cmd->device->lun);
2131 * See if we can find a matching cmd in the pending list.
2133 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2134 if (pending_scb->io_ctx == cmd)
2138 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2140 /* Any SCB for this device will do for a target reset */
2141 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2142 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2143 scmd_channel(cmd) + 'A',
2145 SCB_LIST_NULL, ROLE_INITIATOR))
2150 if (pending_scb == NULL) {
2151 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2155 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2157 * We can't queue two recovery actions using the same SCB
2164 * Ensure that the card doesn't do anything
2165 * behind our back and that we didn't "just" miss
2166 * an interrupt that would affect this cmd.
2168 was_paused = ahc_is_paused(ahc);
2169 ahc_pause_and_flushwork(ahc);
2172 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2173 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2177 printk("%s: At time of recovery, card was %spaused\n",
2178 ahc_name(ahc), was_paused ? "" : "not ");
2179 ahc_dump_card_state(ahc);
2181 disconnected = TRUE;
2182 if (flag == SCB_ABORT) {
2183 if (ahc_search_qinfifo(ahc, cmd->device->id,
2184 cmd->device->channel + 'A',
2186 pending_scb->hscb->tag,
2187 ROLE_INITIATOR, CAM_REQ_ABORTED,
2188 SEARCH_COMPLETE) > 0) {
2189 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2190 ahc_name(ahc), cmd->device->channel,
2191 cmd->device->id, (u8)cmd->device->lun);
2195 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2196 cmd->device->channel + 'A',
2198 pending_scb->hscb->tag,
2199 ROLE_INITIATOR, /*status*/0,
2200 SEARCH_COUNT) > 0) {
2201 disconnected = FALSE;
2204 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2205 struct scb *bus_scb;
2207 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2208 if (bus_scb == pending_scb)
2209 disconnected = FALSE;
2210 else if (flag != SCB_ABORT
2211 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2212 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2213 disconnected = FALSE;
2217 * At this point, pending_scb is the scb associated with the
2218 * passed in command. That command is currently active on the
2219 * bus, is in the disconnected state, or we're hoping to find
2220 * a command for the same target active on the bus to abuse to
2221 * send a BDR. Queue the appropriate message based on which of
2222 * these states we are in.
2224 last_phase = ahc_inb(ahc, LASTPHASE);
2225 saved_scbptr = ahc_inb(ahc, SCBPTR);
2226 active_scb_index = ahc_inb(ahc, SCB_TAG);
2227 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2228 if (last_phase != P_BUSFREE
2229 && (pending_scb->hscb->tag == active_scb_index
2230 || (flag == SCB_DEVICE_RESET
2231 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
2234 * We're active on the bus, so assert ATN
2235 * and hope that the target responds.
2237 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2238 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2239 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2240 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2241 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2243 } else if (disconnected) {
2246 * Actually re-queue this SCB in an attempt
2247 * to select the device before it reconnects.
2248 * In either case (selection or reselection),
2249 * we will now issue the approprate message
2250 * to the timed-out device.
2252 * Set the MK_MESSAGE control bit indicating
2253 * that we desire to send a message. We
2254 * also set the disconnected flag since
2255 * in the paging case there is no guarantee
2256 * that our SCB control byte matches the
2257 * version on the card. We don't want the
2258 * sequencer to abort the command thinking
2259 * an unsolicited reselection occurred.
2261 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2262 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2265 * Remove any cached copy of this SCB in the
2266 * disconnected list in preparation for the
2267 * queuing of our abort SCB. We use the
2268 * same element in the SCB, SCB_NEXT, for
2269 * both the qinfifo and the disconnected list.
2271 ahc_search_disc_list(ahc, cmd->device->id,
2272 cmd->device->channel + 'A',
2273 cmd->device->lun, pending_scb->hscb->tag,
2274 /*stop_on_first*/TRUE,
2276 /*save_state*/FALSE);
2279 * In the non-paging case, the sequencer will
2280 * never re-reference the in-core SCB.
2281 * To make sure we are notified during
2282 * reselection, set the MK_MESSAGE flag in
2283 * the card's copy of the SCB.
2285 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2286 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2287 ahc_outb(ahc, SCB_CONTROL,
2288 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2292 * Clear out any entries in the QINFIFO first
2293 * so we are the next SCB for this target
2296 ahc_search_qinfifo(ahc, cmd->device->id,
2297 cmd->device->channel + 'A',
2298 cmd->device->lun, SCB_LIST_NULL,
2299 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2301 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2302 ahc_outb(ahc, SCBPTR, saved_scbptr);
2303 ahc_print_path(ahc, pending_scb);
2304 printk("Device is disconnected, re-queuing SCB\n");
2307 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2314 * Our assumption is that if we don't have the command, no
2315 * recovery action was required, so we return success. Again,
2316 * the semantics of the mid-layer recovery engine are not
2317 * well defined, so this may change in time.
2324 DECLARE_COMPLETION_ONSTACK(done);
2326 ahc->platform_data->eh_done = &done;
2327 ahc_unlock(ahc, &flags);
2329 printk("Recovery code sleeping\n");
2330 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2331 ahc_lock(ahc, &flags);
2332 ahc->platform_data->eh_done = NULL;
2333 ahc_unlock(ahc, &flags);
2335 printk("Timer Expired\n");
2338 printk("Recovery code awake\n");
2340 ahc_unlock(ahc, &flags);
2345 ahc_platform_dump_card_state(struct ahc_softc *ahc)
2349 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2351 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2352 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2353 struct ahc_devinfo devinfo;
2354 unsigned long flags;
2356 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2357 starget->channel + 'A', ROLE_INITIATOR);
2358 ahc_lock(ahc, &flags);
2359 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2360 ahc_unlock(ahc, &flags);
2363 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2365 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2366 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2367 struct ahc_tmode_tstate *tstate;
2368 struct ahc_initiator_tinfo *tinfo
2369 = ahc_fetch_transinfo(ahc,
2370 starget->channel + 'A',
2371 shost->this_id, starget->id, &tstate);
2372 struct ahc_devinfo devinfo;
2373 unsigned int ppr_options = tinfo->goal.ppr_options;
2374 unsigned long flags;
2375 unsigned long offset = tinfo->goal.offset;
2376 const struct ahc_syncrate *syncrate;
2379 offset = MAX_OFFSET;
2382 period = 9; /* 12.5ns is our minimum */
2384 if (spi_max_width(starget))
2385 ppr_options |= MSG_EXT_PPR_DT_REQ;
2387 /* need wide for DT and need DT for 12.5 ns */
2391 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2392 starget->channel + 'A', ROLE_INITIATOR);
2394 /* all PPR requests apart from QAS require wide transfers */
2395 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2396 if (spi_width(starget) == 0)
2397 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2400 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2401 ahc_lock(ahc, &flags);
2402 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2403 ppr_options, AHC_TRANS_GOAL, FALSE);
2404 ahc_unlock(ahc, &flags);
2407 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2409 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2410 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2411 struct ahc_tmode_tstate *tstate;
2412 struct ahc_initiator_tinfo *tinfo
2413 = ahc_fetch_transinfo(ahc,
2414 starget->channel + 'A',
2415 shost->this_id, starget->id, &tstate);
2416 struct ahc_devinfo devinfo;
2417 unsigned int ppr_options = 0;
2418 unsigned int period = 0;
2419 unsigned long flags;
2420 const struct ahc_syncrate *syncrate = NULL;
2422 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2423 starget->channel + 'A', ROLE_INITIATOR);
2425 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2426 period = tinfo->goal.period;
2427 ppr_options = tinfo->goal.ppr_options;
2429 ahc_lock(ahc, &flags);
2430 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2431 ppr_options, AHC_TRANS_GOAL, FALSE);
2432 ahc_unlock(ahc, &flags);
2435 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2437 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2438 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2439 struct ahc_tmode_tstate *tstate;
2440 struct ahc_initiator_tinfo *tinfo
2441 = ahc_fetch_transinfo(ahc,
2442 starget->channel + 'A',
2443 shost->this_id, starget->id, &tstate);
2444 struct ahc_devinfo devinfo;
2445 unsigned int ppr_options = tinfo->goal.ppr_options
2446 & ~MSG_EXT_PPR_DT_REQ;
2447 unsigned int period = tinfo->goal.period;
2448 unsigned int width = tinfo->goal.width;
2449 unsigned long flags;
2450 const struct ahc_syncrate *syncrate;
2452 if (dt && spi_max_width(starget)) {
2453 ppr_options |= MSG_EXT_PPR_DT_REQ;
2455 ahc_linux_set_width(starget, 1);
2456 } else if (period == 9)
2457 period = 10; /* if resetting DT, period must be >= 25ns */
2459 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2460 starget->channel + 'A', ROLE_INITIATOR);
2461 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
2462 ahc_lock(ahc, &flags);
2463 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2464 ppr_options, AHC_TRANS_GOAL, FALSE);
2465 ahc_unlock(ahc, &flags);
2469 /* FIXME: This code claims to support IU and QAS. However, the actual
2470 * sequencer code and aic7xxx_core have no support for these parameters and
2471 * will get into a bad state if they're negotiated. Do not enable this
2472 * unless you know what you're doing */
2473 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2475 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2476 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2477 struct ahc_tmode_tstate *tstate;
2478 struct ahc_initiator_tinfo *tinfo
2479 = ahc_fetch_transinfo(ahc,
2480 starget->channel + 'A',
2481 shost->this_id, starget->id, &tstate);
2482 struct ahc_devinfo devinfo;
2483 unsigned int ppr_options = tinfo->goal.ppr_options
2484 & ~MSG_EXT_PPR_QAS_REQ;
2485 unsigned int period = tinfo->goal.period;
2486 unsigned long flags;
2487 struct ahc_syncrate *syncrate;
2490 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2492 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2493 starget->channel + 'A', ROLE_INITIATOR);
2494 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2495 ahc_lock(ahc, &flags);
2496 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2497 ppr_options, AHC_TRANS_GOAL, FALSE);
2498 ahc_unlock(ahc, &flags);
2501 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2503 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2504 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2505 struct ahc_tmode_tstate *tstate;
2506 struct ahc_initiator_tinfo *tinfo
2507 = ahc_fetch_transinfo(ahc,
2508 starget->channel + 'A',
2509 shost->this_id, starget->id, &tstate);
2510 struct ahc_devinfo devinfo;
2511 unsigned int ppr_options = tinfo->goal.ppr_options
2512 & ~MSG_EXT_PPR_IU_REQ;
2513 unsigned int period = tinfo->goal.period;
2514 unsigned long flags;
2515 struct ahc_syncrate *syncrate;
2518 ppr_options |= MSG_EXT_PPR_IU_REQ;
2520 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2521 starget->channel + 'A', ROLE_INITIATOR);
2522 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2523 ahc_lock(ahc, &flags);
2524 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2525 ppr_options, AHC_TRANS_GOAL, FALSE);
2526 ahc_unlock(ahc, &flags);
2530 static void ahc_linux_get_signalling(struct Scsi_Host *shost)
2532 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata;
2533 unsigned long flags;
2536 if (!(ahc->features & AHC_ULTRA2)) {
2537 /* non-LVD chipset, may not have SBLKCTL reg */
2538 spi_signalling(shost) =
2539 ahc->features & AHC_HVD ?
2545 ahc_lock(ahc, &flags);
2547 mode = ahc_inb(ahc, SBLKCTL);
2549 ahc_unlock(ahc, &flags);
2552 spi_signalling(shost) = SPI_SIGNAL_LVD;
2553 else if (mode & ENAB20)
2554 spi_signalling(shost) = SPI_SIGNAL_SE;
2556 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2559 static struct spi_function_template ahc_linux_transport_functions = {
2560 .set_offset = ahc_linux_set_offset,
2562 .set_period = ahc_linux_set_period,
2564 .set_width = ahc_linux_set_width,
2566 .set_dt = ahc_linux_set_dt,
2569 .set_iu = ahc_linux_set_iu,
2571 .set_qas = ahc_linux_set_qas,
2574 .get_signalling = ahc_linux_get_signalling,
2580 ahc_linux_init(void)
2583 * If we've been passed any parameters, process them now.
2586 aic7xxx_setup(aic7xxx);
2588 ahc_linux_transport_template =
2589 spi_attach_transport(&ahc_linux_transport_functions);
2590 if (!ahc_linux_transport_template)
2593 scsi_transport_reserve_device(ahc_linux_transport_template,
2594 sizeof(struct ahc_linux_device));
2596 ahc_linux_pci_init();
2597 ahc_linux_eisa_init();
2602 ahc_linux_exit(void)
2604 ahc_linux_pci_exit();
2605 ahc_linux_eisa_exit();
2606 spi_release_transport(ahc_linux_transport_template);
2609 module_init(ahc_linux_init);
2610 module_exit(ahc_linux_exit);