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>
125 #include <scsi/scsi_transport.h>
126 #include <scsi/scsi_transport_spi.h>
128 static struct scsi_transport_template *ahc_linux_transport_template = NULL;
131 * Include aiclib.c as part of our
132 * "module dependencies are hard" work around.
136 #include <linux/init.h> /* __setup */
137 #include <linux/mm.h> /* For fetching system memory size */
138 #include <linux/blkdev.h> /* For block_size() */
139 #include <linux/delay.h> /* For ssleep/msleep */
142 * Lock protecting manipulation of the ahc softc list.
144 spinlock_t ahc_list_spinlock;
147 * Set this to the delay in seconds after SCSI bus reset.
148 * Note, we honor this only for the initial bus reset.
149 * The scsi error recovery code performs its own bus settle
150 * delay handling for error recovery actions.
152 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
153 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
155 #define AIC7XXX_RESET_DELAY 5000
159 * Control collection of SCSI transfer statistics for the /proc filesystem.
161 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
162 * NOTE: This does affect performance since it has to maintain statistics.
164 #ifdef CONFIG_AIC7XXX_PROC_STATS
165 #define AIC7XXX_PROC_STATS
169 * To change the default number of tagged transactions allowed per-device,
170 * add a line to the lilo.conf file like:
171 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
172 * which will result in the first four devices on the first two
173 * controllers being set to a tagged queue depth of 32.
175 * The tag_commands is an array of 16 to allow for wide and twin adapters.
176 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
180 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
181 } adapter_tag_info_t;
184 * Modify this as you see fit for your system.
186 * 0 tagged queuing disabled
187 * 1 <= n <= 253 n == max tags ever dispatched.
189 * The driver will throttle the number of commands dispatched to a
190 * device if it returns queue full. For devices with a fixed maximum
191 * queue depth, the driver will eventually determine this depth and
192 * lock it in (a console message is printed to indicate that a lock
193 * has occurred). On some devices, queue full is returned for a temporary
194 * resource shortage. These devices will return queue full at varying
195 * depths. The driver will throttle back when the queue fulls occur and
196 * attempt to slowly increase the depth over time as the device recovers
197 * from the resource shortage.
199 * In this example, the first line will disable tagged queueing for all
200 * the devices on the first probed aic7xxx adapter.
202 * The second line enables tagged queueing with 4 commands/LUN for IDs
203 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
204 * driver to attempt to use up to 64 tags for ID 1.
206 * The third line is the same as the first line.
208 * The fourth line disables tagged queueing for devices 0 and 3. It
209 * enables tagged queueing for the other IDs, with 16 commands/LUN
210 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
211 * IDs 2, 5-7, and 9-15.
215 * NOTE: The below structure is for reference only, the actual structure
216 * to modify in order to change things is just below this comment block.
217 adapter_tag_info_t aic7xxx_tag_info[] =
219 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
220 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
221 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
222 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
226 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
227 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
229 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
232 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
233 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
234 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
235 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
236 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
237 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
238 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
239 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
240 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
244 * By default, use the number of commands specified by
245 * the users kernel configuration.
247 static adapter_tag_info_t aic7xxx_tag_info[] =
249 {AIC7XXX_CONFIGED_TAG_COMMANDS},
250 {AIC7XXX_CONFIGED_TAG_COMMANDS},
251 {AIC7XXX_CONFIGED_TAG_COMMANDS},
252 {AIC7XXX_CONFIGED_TAG_COMMANDS},
253 {AIC7XXX_CONFIGED_TAG_COMMANDS},
254 {AIC7XXX_CONFIGED_TAG_COMMANDS},
255 {AIC7XXX_CONFIGED_TAG_COMMANDS},
256 {AIC7XXX_CONFIGED_TAG_COMMANDS},
257 {AIC7XXX_CONFIGED_TAG_COMMANDS},
258 {AIC7XXX_CONFIGED_TAG_COMMANDS},
259 {AIC7XXX_CONFIGED_TAG_COMMANDS},
260 {AIC7XXX_CONFIGED_TAG_COMMANDS},
261 {AIC7XXX_CONFIGED_TAG_COMMANDS},
262 {AIC7XXX_CONFIGED_TAG_COMMANDS},
263 {AIC7XXX_CONFIGED_TAG_COMMANDS},
264 {AIC7XXX_CONFIGED_TAG_COMMANDS}
268 * There should be a specific return value for this in scsi.h, but
269 * it seems that most drivers ignore it.
271 #define DID_UNDERFLOW DID_ERROR
274 ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
276 printk("(scsi%d:%c:%d:%d): ",
277 ahc->platform_data->host->host_no,
278 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
279 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
280 scb != NULL ? SCB_GET_LUN(scb) : -1);
284 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
285 * cards in the system. This should be fixed. Exceptions to this
286 * rule are noted in the comments.
290 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
291 * has no effect on any later resets that might occur due to things like
294 static uint32_t aic7xxx_no_reset;
297 * Certain PCI motherboards will scan PCI devices from highest to lowest,
298 * others scan from lowest to highest, and they tend to do all kinds of
299 * strange things when they come into contact with PCI bridge chips. The
300 * net result of all this is that the PCI card that is actually used to boot
301 * the machine is very hard to detect. Most motherboards go from lowest
302 * PCI slot number to highest, and the first SCSI controller found is the
303 * one you boot from. The only exceptions to this are when a controller
304 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
305 * from lowest PCI slot number to highest PCI slot number. We also force
306 * all controllers with their BIOS disabled to the end of the list. This
307 * works on *almost* all computers. Where it doesn't work, we have this
308 * option. Setting this option to non-0 will reverse the order of the sort
309 * to highest first, then lowest, but will still leave cards with their BIOS
310 * disabled at the very end. That should fix everyone up unless there are
311 * really strange cirumstances.
313 static uint32_t aic7xxx_reverse_scan;
316 * Should we force EXTENDED translation on a controller.
317 * 0 == Use whatever is in the SEEPROM or default to off
318 * 1 == Use whatever is in the SEEPROM or default to on
320 static uint32_t aic7xxx_extended;
323 * PCI bus parity checking of the Adaptec controllers. This is somewhat
324 * dubious at best. To my knowledge, this option has never actually
325 * solved a PCI parity problem, but on certain machines with broken PCI
326 * chipset configurations where stray PCI transactions with bad parity are
327 * the norm rather than the exception, the error messages can be overwelming.
328 * It's included in the driver for completeness.
329 * 0 = Shut off PCI parity check
330 * non-0 = reverse polarity pci parity checking
332 static uint32_t aic7xxx_pci_parity = ~0;
335 * Certain newer motherboards have put new PCI based devices into the
336 * IO spaces that used to typically be occupied by VLB or EISA cards.
337 * This overlap can cause these newer motherboards to lock up when scanned
338 * for older EISA and VLB devices. Setting this option to non-0 will
339 * cause the driver to skip scanning for any VLB or EISA controllers and
340 * only support the PCI controllers. NOTE: this means that if the kernel
341 * os compiled with PCI support disabled, then setting this to non-0
342 * would result in never finding any devices :)
344 #ifndef CONFIG_AIC7XXX_PROBE_EISA_VL
345 uint32_t aic7xxx_probe_eisa_vl;
347 uint32_t aic7xxx_probe_eisa_vl = ~0;
351 * There are lots of broken chipsets in the world. Some of them will
352 * violate the PCI spec when we issue byte sized memory writes to our
353 * controller. I/O mapped register access, if allowed by the given
354 * platform, will work in almost all cases.
356 uint32_t aic7xxx_allow_memio = ~0;
359 * aic7xxx_detect() has been run, so register all device arrivals
360 * immediately with the system rather than deferring to the sorted
361 * attachment performed by aic7xxx_detect().
363 int aic7xxx_detect_complete;
366 * So that we can set how long each device is given as a selection timeout.
367 * The table of values goes like this:
372 * We default to 256ms because some older devices need a longer time
373 * to respond to initial selection.
375 static uint32_t aic7xxx_seltime;
378 * Certain devices do not perform any aging on commands. Should the
379 * device be saturated by commands in one portion of the disk, it is
380 * possible for transactions on far away sectors to never be serviced.
381 * To handle these devices, we can periodically send an ordered tag to
382 * force all outstanding transactions to be serviced prior to a new
385 uint32_t aic7xxx_periodic_otag;
388 * Module information and settable options.
390 static char *aic7xxx = NULL;
392 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
393 MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
394 MODULE_LICENSE("Dual BSD/GPL");
395 MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
396 module_param(aic7xxx, charp, 0444);
397 MODULE_PARM_DESC(aic7xxx,
398 "period delimited, options string.\n"
399 " verbose Enable verbose/diagnostic logging\n"
400 " allow_memio Allow device registers to be memory mapped\n"
401 " debug Bitmask of debug values to enable\n"
402 " no_probe Toggle EISA/VLB controller probing\n"
403 " probe_eisa_vl Toggle EISA/VLB controller probing\n"
404 " no_reset Supress initial bus resets\n"
405 " extended Enable extended geometry on all controllers\n"
406 " periodic_otag Send an ordered tagged transaction\n"
407 " periodically to prevent tag starvation.\n"
408 " This may be required by some older disk\n"
409 " drives or RAID arrays.\n"
410 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
411 " tag_info:<tag_str> Set per-target tag depth\n"
412 " global_tag_depth:<int> Global tag depth for every target\n"
414 " seltime:<int> Selection Timeout\n"
415 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
417 " Sample /etc/modprobe.conf line:\n"
418 " Toggle EISA/VLB probing\n"
419 " Set tag depth on Controller 1/Target 1 to 10 tags\n"
420 " Shorten the selection timeout to 128ms\n"
422 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
425 static void ahc_linux_handle_scsi_status(struct ahc_softc *,
426 struct ahc_linux_device *,
428 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
429 struct scsi_cmnd *cmd);
430 static void ahc_linux_sem_timeout(u_long arg);
431 static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
432 static void ahc_linux_release_simq(u_long arg);
433 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
434 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
435 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
436 struct ahc_devinfo *devinfo);
437 static void ahc_linux_device_queue_depth(struct ahc_softc *ahc,
438 struct ahc_linux_device *dev);
439 static struct ahc_linux_target* ahc_linux_alloc_target(struct ahc_softc*,
441 static void ahc_linux_free_target(struct ahc_softc*,
442 struct ahc_linux_target*);
443 static struct ahc_linux_device* ahc_linux_alloc_device(struct ahc_softc*,
444 struct ahc_linux_target*,
446 static void ahc_linux_free_device(struct ahc_softc*,
447 struct ahc_linux_device*);
448 static int ahc_linux_run_command(struct ahc_softc*,
449 struct ahc_linux_device *,
451 static void ahc_linux_setup_tag_info_global(char *p);
452 static aic_option_callback_t ahc_linux_setup_tag_info;
453 static int aic7xxx_setup(char *s);
454 static int ahc_linux_next_unit(void);
456 /********************************* Inlines ************************************/
457 static __inline struct ahc_linux_device*
458 ahc_linux_get_device(struct ahc_softc *ahc, u_int channel,
459 u_int target, u_int lun);
460 static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
462 static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
463 struct ahc_dma_seg *sg,
464 dma_addr_t addr, bus_size_t len);
466 static __inline struct ahc_linux_device*
467 ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target,
470 struct ahc_linux_target *targ;
471 struct ahc_linux_device *dev;
474 target_offset = target;
477 targ = ahc->platform_data->targets[target_offset];
478 BUG_ON(targ == NULL);
479 dev = targ->devices[lun];
484 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
486 struct scsi_cmnd *cmd;
489 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
490 if (cmd->use_sg != 0) {
491 struct scatterlist *sg;
493 sg = (struct scatterlist *)cmd->request_buffer;
494 pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg,
495 cmd->sc_data_direction);
496 } else if (cmd->request_bufflen != 0) {
497 pci_unmap_single(ahc->dev_softc,
498 scb->platform_data->buf_busaddr,
499 cmd->request_bufflen,
500 cmd->sc_data_direction);
505 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
506 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
510 if ((scb->sg_count + 1) > AHC_NSEG)
511 panic("Too few segs for dma mapping. "
512 "Increase AHC_NSEG\n");
515 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
516 scb->platform_data->xfer_len += len;
518 if (sizeof(dma_addr_t) > 4
519 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
520 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
522 sg->len = ahc_htole32(len);
527 * Try to detect an Adaptec 7XXX controller.
530 ahc_linux_detect(struct scsi_host_template *template)
532 struct ahc_softc *ahc;
536 * Sanity checking of Linux SCSI data structures so
537 * that some of our hacks^H^H^H^H^Hassumptions aren't
540 if (offsetof(struct ahc_cmd_internal, end)
541 > offsetof(struct scsi_cmnd, host_scribble)) {
542 printf("ahc_linux_detect: SCSI data structures changed.\n");
543 printf("ahc_linux_detect: Unable to attach\n");
547 * If we've been passed any parameters, process them now.
550 aic7xxx_setup(aic7xxx);
552 template->proc_name = "aic7xxx";
555 * Initialize our softc list lock prior to
556 * probing for any adapters.
560 found = ahc_linux_pci_init();
561 if (!ahc_linux_eisa_init())
565 * Register with the SCSI layer all
566 * controllers we've found.
568 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
570 if (ahc_linux_register_host(ahc, template) == 0)
574 aic7xxx_detect_complete++;
580 * Return a string describing the driver.
583 ahc_linux_info(struct Scsi_Host *host)
585 static char buffer[512];
588 struct ahc_softc *ahc;
591 ahc = *(struct ahc_softc **)host->hostdata;
592 memset(bp, 0, sizeof(buffer));
593 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
594 strcat(bp, AIC7XXX_DRIVER_VERSION);
597 strcat(bp, ahc->description);
600 ahc_controller_info(ahc, ahc_info);
601 strcat(bp, ahc_info);
608 * Queue an SCB to the controller.
611 ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
613 struct ahc_softc *ahc;
614 struct ahc_linux_device *dev;
616 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
619 * Save the callback on completion function.
621 cmd->scsi_done = scsi_done;
624 * Close the race of a command that was in the process of
625 * being queued to us just as our simq was frozen. Let
626 * DV commands through so long as we are only frozen to
629 if (ahc->platform_data->qfrozen != 0)
630 return SCSI_MLQUEUE_HOST_BUSY;
632 dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
636 cmd->result = CAM_REQ_INPROG << 16;
638 return ahc_linux_run_command(ahc, dev, cmd);
642 ahc_linux_slave_alloc(struct scsi_device *device)
644 struct ahc_softc *ahc;
645 struct ahc_linux_target *targ;
646 struct scsi_target *starget = device->sdev_target;
647 struct ahc_linux_device *dev;
648 unsigned int target_offset;
650 int retval = -ENOMEM;
652 target_offset = starget->id;
653 if (starget->channel != 0)
656 ahc = *((struct ahc_softc **)device->host->hostdata);
658 printf("%s: Slave Alloc %d\n", ahc_name(ahc), device->id);
659 ahc_lock(ahc, &flags);
660 targ = ahc->platform_data->targets[target_offset];
662 targ = ahc_linux_alloc_target(ahc, starget->channel, starget->id);
663 struct seeprom_config *sc = ahc->seep_config;
668 unsigned short scsirate;
669 struct ahc_devinfo devinfo;
670 struct ahc_initiator_tinfo *tinfo;
671 struct ahc_tmode_tstate *tstate;
672 char channel = starget->channel + 'A';
673 unsigned int our_id = ahc->our_id;
675 if (starget->channel)
676 our_id = ahc->our_id_b;
678 if ((ahc->features & AHC_ULTRA2) != 0) {
679 scsirate = sc->device_flags[target_offset] & CFXFER;
681 scsirate = (sc->device_flags[target_offset] & CFXFER) << 4;
682 if (sc->device_flags[target_offset] & CFSYNCH)
685 if (sc->device_flags[target_offset] & CFWIDEB) {
686 scsirate |= WIDEXFER;
687 spi_max_width(starget) = 1;
689 spi_max_width(starget) = 0;
690 spi_min_period(starget) =
691 ahc_find_period(ahc, scsirate, AHC_SYNCRATE_DT);
692 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
693 targ->target, &tstate);
694 ahc_compile_devinfo(&devinfo, our_id, targ->target,
695 CAM_LUN_WILDCARD, channel,
697 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
698 AHC_TRANS_GOAL, /*paused*/FALSE);
699 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
700 AHC_TRANS_GOAL, /*paused*/FALSE);
704 dev = targ->devices[device->lun];
706 dev = ahc_linux_alloc_device(ahc, targ, device->lun);
713 ahc_unlock(ahc, &flags);
718 ahc_linux_slave_configure(struct scsi_device *device)
720 struct ahc_softc *ahc;
721 struct ahc_linux_device *dev;
723 ahc = *((struct ahc_softc **)device->host->hostdata);
726 printf("%s: Slave Configure %d\n", ahc_name(ahc), device->id);
728 dev = ahc_linux_get_device(ahc, device->channel, device->id,
730 dev->scsi_device = device;
731 ahc_linux_device_queue_depth(ahc, dev);
733 /* Initial Domain Validation */
734 if (!spi_initial_dv(device->sdev_target))
735 spi_dv_device(device);
741 ahc_linux_slave_destroy(struct scsi_device *device)
743 struct ahc_softc *ahc;
744 struct ahc_linux_device *dev;
746 ahc = *((struct ahc_softc **)device->host->hostdata);
748 printf("%s: Slave Destroy %d\n", ahc_name(ahc), device->id);
749 dev = ahc_linux_get_device(ahc, device->channel,
750 device->id, device->lun);
754 ahc_linux_free_device(ahc, dev);
757 #if defined(__i386__)
759 * Return the disk geometry for the given SCSI device.
762 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
763 sector_t capacity, int geom[])
771 struct ahc_softc *ahc;
774 ahc = *((struct ahc_softc **)sdev->host->hostdata);
775 channel = sdev->channel;
777 bh = scsi_bios_ptable(bdev);
779 ret = scsi_partsize(bh, capacity,
780 &geom[2], &geom[0], &geom[1]);
787 cylinders = aic_sector_div(capacity, heads, sectors);
789 if (aic7xxx_extended != 0)
791 else if (channel == 0)
792 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
794 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
795 if (extended && cylinders >= 1024) {
798 cylinders = aic_sector_div(capacity, heads, sectors);
808 * Abort the current SCSI command(s).
811 ahc_linux_abort(struct scsi_cmnd *cmd)
815 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
817 printf("aic7xxx_abort returns 0x%x\n", error);
822 * Attempt to send a target reset message to the device that timed out.
825 ahc_linux_dev_reset(struct scsi_cmnd *cmd)
829 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
831 printf("aic7xxx_dev_reset returns 0x%x\n", error);
836 * Reset the SCSI bus.
839 ahc_linux_bus_reset(struct scsi_cmnd *cmd)
841 struct ahc_softc *ahc;
844 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
845 found = ahc_reset_channel(ahc, cmd->device->channel + 'A',
846 /*initiate reset*/TRUE);
849 printf("%s: SCSI bus reset delivered. "
850 "%d SCBs aborted.\n", ahc_name(ahc), found);
855 struct scsi_host_template aic7xxx_driver_template = {
856 .module = THIS_MODULE,
858 .proc_info = ahc_linux_proc_info,
859 .info = ahc_linux_info,
860 .queuecommand = ahc_linux_queue,
861 .eh_abort_handler = ahc_linux_abort,
862 .eh_device_reset_handler = ahc_linux_dev_reset,
863 .eh_bus_reset_handler = ahc_linux_bus_reset,
864 #if defined(__i386__)
865 .bios_param = ahc_linux_biosparam,
867 .can_queue = AHC_MAX_QUEUE,
870 .use_clustering = ENABLE_CLUSTERING,
871 .slave_alloc = ahc_linux_slave_alloc,
872 .slave_configure = ahc_linux_slave_configure,
873 .slave_destroy = ahc_linux_slave_destroy,
876 /**************************** Tasklet Handler *********************************/
878 /******************************** Macros **************************************/
879 #define BUILD_SCSIID(ahc, cmd) \
880 ((((cmd)->device->id << TID_SHIFT) & TID) \
881 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
882 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
884 /******************************** Bus DMA *************************************/
886 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
887 bus_size_t alignment, bus_size_t boundary,
888 dma_addr_t lowaddr, dma_addr_t highaddr,
889 bus_dma_filter_t *filter, void *filterarg,
890 bus_size_t maxsize, int nsegments,
891 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
895 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
900 * Linux is very simplistic about DMA memory. For now don't
901 * maintain all specification information. Once Linux supplies
902 * better facilities for doing these operations, or the
903 * needs of this particular driver change, we might need to do
906 dmat->alignment = alignment;
907 dmat->boundary = boundary;
908 dmat->maxsize = maxsize;
914 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
916 free(dmat, M_DEVBUF);
920 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
921 int flags, bus_dmamap_t *mapp)
923 *vaddr = pci_alloc_consistent(ahc->dev_softc,
924 dmat->maxsize, mapp);
931 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
932 void* vaddr, bus_dmamap_t map)
934 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
939 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
940 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
941 void *cb_arg, int flags)
944 * Assume for now that this will only be used during
945 * initialization and not for per-transaction buffer mapping.
947 bus_dma_segment_t stack_sg;
949 stack_sg.ds_addr = map;
950 stack_sg.ds_len = dmat->maxsize;
951 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
956 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
961 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
967 /********************* Platform Dependent Functions ***************************/
969 * Compare "left hand" softc with "right hand" softc, returning:
970 * < 0 - lahc has a lower priority than rahc
971 * 0 - Softcs are equal
972 * > 0 - lahc has a higher priority than rahc
975 ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc)
982 * Under Linux, cards are ordered as follows:
983 * 1) VLB/EISA BIOS enabled devices sorted by BIOS address.
984 * 2) PCI devices with BIOS enabled sorted by bus/slot/func.
985 * 3) All remaining VLB/EISA devices sorted by ioport.
986 * 4) All remaining PCI devices sorted by bus/slot/func.
988 value = (lahc->flags & AHC_BIOS_ENABLED)
989 - (rahc->flags & AHC_BIOS_ENABLED);
991 /* Controllers with BIOS enabled have a *higher* priority */
995 * Same BIOS setting, now sort based on bus type.
996 * EISA and VL controllers sort together. EISA/VL
997 * have higher priority than PCI.
999 rvalue = (rahc->chip & AHC_BUS_MASK);
1000 if (rvalue == AHC_VL)
1002 lvalue = (lahc->chip & AHC_BUS_MASK);
1003 if (lvalue == AHC_VL)
1005 value = rvalue - lvalue;
1009 /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */
1014 char primary_channel;
1016 if (aic7xxx_reverse_scan != 0)
1017 value = ahc_get_pci_bus(lahc->dev_softc)
1018 - ahc_get_pci_bus(rahc->dev_softc);
1020 value = ahc_get_pci_bus(rahc->dev_softc)
1021 - ahc_get_pci_bus(lahc->dev_softc);
1024 if (aic7xxx_reverse_scan != 0)
1025 value = ahc_get_pci_slot(lahc->dev_softc)
1026 - ahc_get_pci_slot(rahc->dev_softc);
1028 value = ahc_get_pci_slot(rahc->dev_softc)
1029 - ahc_get_pci_slot(lahc->dev_softc);
1033 * On multi-function devices, the user can choose
1034 * to have function 1 probed before function 0.
1035 * Give whichever channel is the primary channel
1036 * the highest priority.
1038 primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A';
1040 if (lahc->channel == primary_channel)
1046 if ((rahc->flags & AHC_BIOS_ENABLED) != 0) {
1047 value = rahc->platform_data->bios_address
1048 - lahc->platform_data->bios_address;
1050 value = rahc->bsh.ioport
1055 panic("ahc_softc_sort: invalid bus type");
1061 ahc_linux_setup_tag_info_global(char *p)
1065 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1066 printf("Setting Global Tags= %d\n", tags);
1068 for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
1069 for (j = 0; j < AHC_NUM_TARGETS; j++) {
1070 aic7xxx_tag_info[i].tag_commands[j] = tags;
1076 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1079 if ((instance >= 0) && (targ >= 0)
1080 && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
1081 && (targ < AHC_NUM_TARGETS)) {
1082 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
1084 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
1089 * Handle Linux boot parameters. This routine allows for assigning a value
1090 * to a parameter with a ':' between the parameter and the value.
1091 * ie. aic7xxx=stpwlev:1,extended
1094 aic7xxx_setup(char *s)
1104 { "extended", &aic7xxx_extended },
1105 { "no_reset", &aic7xxx_no_reset },
1106 { "verbose", &aic7xxx_verbose },
1107 { "allow_memio", &aic7xxx_allow_memio},
1109 { "debug", &ahc_debug },
1111 { "reverse_scan", &aic7xxx_reverse_scan },
1112 { "no_probe", &aic7xxx_probe_eisa_vl },
1113 { "probe_eisa_vl", &aic7xxx_probe_eisa_vl },
1114 { "periodic_otag", &aic7xxx_periodic_otag },
1115 { "pci_parity", &aic7xxx_pci_parity },
1116 { "seltime", &aic7xxx_seltime },
1117 { "tag_info", NULL },
1118 { "global_tag_depth", NULL },
1122 end = strchr(s, '\0');
1125 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1126 * will never be 0 in this case.
1130 while ((p = strsep(&s, ",.")) != NULL) {
1133 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1135 n = strlen(options[i].name);
1136 if (strncmp(options[i].name, p, n) == 0)
1139 if (i == NUM_ELEMENTS(options))
1142 if (strncmp(p, "global_tag_depth", n) == 0) {
1143 ahc_linux_setup_tag_info_global(p + n);
1144 } else if (strncmp(p, "tag_info", n) == 0) {
1145 s = aic_parse_brace_option("tag_info", p + n, end,
1146 2, ahc_linux_setup_tag_info, 0);
1147 } else if (p[n] == ':') {
1148 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1149 } else if (strncmp(p, "verbose", n) == 0) {
1150 *(options[i].flag) = 1;
1152 *(options[i].flag) ^= 0xFFFFFFFF;
1158 __setup("aic7xxx=", aic7xxx_setup);
1160 uint32_t aic7xxx_verbose;
1163 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1166 struct Scsi_Host *host;
1170 template->name = ahc->description;
1171 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1175 *((struct ahc_softc **)host->hostdata) = ahc;
1177 scsi_assign_lock(host, &ahc->platform_data->spin_lock);
1178 ahc->platform_data->host = host;
1179 host->can_queue = AHC_MAX_QUEUE;
1180 host->cmd_per_lun = 2;
1181 /* XXX No way to communicate the ID for multiple channels */
1182 host->this_id = ahc->our_id;
1183 host->irq = ahc->platform_data->irq;
1184 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1185 host->max_lun = AHC_NUM_LUNS;
1186 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1187 host->sg_tablesize = AHC_NSEG;
1188 ahc_set_unit(ahc, ahc_linux_next_unit());
1189 sprintf(buf, "scsi%d", host->host_no);
1190 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1191 if (new_name != NULL) {
1192 strcpy(new_name, buf);
1193 ahc_set_name(ahc, new_name);
1195 host->unique_id = ahc->unit;
1196 ahc_linux_initialize_scsi_bus(ahc);
1197 ahc_intr_enable(ahc, TRUE);
1198 ahc_unlock(ahc, &s);
1200 host->transportt = ahc_linux_transport_template;
1202 scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
1203 scsi_scan_host(host);
1208 ahc_linux_get_memsize(void)
1213 return ((uint64_t)si.totalram << PAGE_SHIFT);
1217 * Find the smallest available unit number to use
1218 * for a new device. We don't just use a static
1219 * count to handle the "repeated hot-(un)plug"
1223 ahc_linux_next_unit(void)
1225 struct ahc_softc *ahc;
1230 TAILQ_FOREACH(ahc, &ahc_tailq, links) {
1231 if (ahc->unit == unit) {
1240 * Place the SCSI bus into a known state by either resetting it,
1241 * or forcing transfer negotiations on the next command to any
1245 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1253 if (aic7xxx_no_reset != 0)
1254 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1256 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1257 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1259 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1261 if ((ahc->features & AHC_TWIN) != 0) {
1263 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1264 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1273 * Force negotiation to async for all targets that
1274 * will not see an initial bus reset.
1276 for (; i < numtarg; i++) {
1277 struct ahc_devinfo devinfo;
1278 struct ahc_initiator_tinfo *tinfo;
1279 struct ahc_tmode_tstate *tstate;
1285 our_id = ahc->our_id;
1287 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1289 our_id = ahc->our_id_b;
1292 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1293 target_id, &tstate);
1294 ahc_compile_devinfo(&devinfo, our_id, target_id,
1295 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1296 ahc_update_neg_request(ahc, &devinfo, tstate,
1297 tinfo, AHC_NEG_ALWAYS);
1299 /* Give the bus some time to recover */
1300 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1301 ahc_linux_freeze_simq(ahc);
1302 init_timer(&ahc->platform_data->reset_timer);
1303 ahc->platform_data->reset_timer.data = (u_long)ahc;
1304 ahc->platform_data->reset_timer.expires =
1305 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
1306 ahc->platform_data->reset_timer.function =
1307 ahc_linux_release_simq;
1308 add_timer(&ahc->platform_data->reset_timer);
1313 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1316 ahc->platform_data =
1317 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1318 if (ahc->platform_data == NULL)
1320 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1321 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1323 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
1324 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1325 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1326 if (aic7xxx_pci_parity == 0)
1327 ahc->flags |= AHC_DISABLE_PCI_PERR;
1333 ahc_platform_free(struct ahc_softc *ahc)
1335 struct ahc_linux_target *targ;
1336 struct ahc_linux_device *dev;
1339 if (ahc->platform_data != NULL) {
1340 if (ahc->platform_data->host != NULL) {
1341 scsi_remove_host(ahc->platform_data->host);
1342 scsi_host_put(ahc->platform_data->host);
1345 /* destroy all of the device and target objects */
1346 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1347 targ = ahc->platform_data->targets[i];
1349 /* Keep target around through the loop. */
1351 for (j = 0; j < AHC_NUM_LUNS; j++) {
1353 if (targ->devices[j] == NULL)
1355 dev = targ->devices[j];
1356 ahc_linux_free_device(ahc, dev);
1359 * Forcibly free the target now that
1360 * all devices are gone.
1362 ahc_linux_free_target(ahc, targ);
1366 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1367 free_irq(ahc->platform_data->irq, ahc);
1368 if (ahc->tag == BUS_SPACE_PIO
1369 && ahc->bsh.ioport != 0)
1370 release_region(ahc->bsh.ioport, 256);
1371 if (ahc->tag == BUS_SPACE_MEMIO
1372 && ahc->bsh.maddr != NULL) {
1373 iounmap(ahc->bsh.maddr);
1374 release_mem_region(ahc->platform_data->mem_busaddr,
1378 free(ahc->platform_data, M_DEVBUF);
1383 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1385 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1386 SCB_GET_CHANNEL(ahc, scb),
1387 SCB_GET_LUN(scb), SCB_LIST_NULL,
1388 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1392 ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1395 struct ahc_linux_device *dev;
1399 dev = ahc_linux_get_device(ahc, devinfo->channel - 'A',
1404 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1407 case AHC_QUEUE_NONE:
1410 case AHC_QUEUE_BASIC:
1411 now_queuing = AHC_DEV_Q_BASIC;
1413 case AHC_QUEUE_TAGGED:
1414 now_queuing = AHC_DEV_Q_TAGGED;
1417 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1418 && (was_queuing != now_queuing)
1419 && (dev->active != 0)) {
1420 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1424 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1428 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1431 * Start out agressively and allow our
1432 * dynamic queue depth algorithm to take
1435 dev->maxtags = usertags;
1436 dev->openings = dev->maxtags - dev->active;
1438 if (dev->maxtags == 0) {
1440 * Queueing is disabled by the user.
1443 } else if (alg == AHC_QUEUE_TAGGED) {
1444 dev->flags |= AHC_DEV_Q_TAGGED;
1445 if (aic7xxx_periodic_otag != 0)
1446 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1448 dev->flags |= AHC_DEV_Q_BASIC;
1450 /* We can only have one opening. */
1452 dev->openings = 1 - dev->active;
1454 if (dev->scsi_device != NULL) {
1455 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1456 case AHC_DEV_Q_BASIC:
1457 scsi_adjust_queue_depth(dev->scsi_device,
1459 dev->openings + dev->active);
1461 case AHC_DEV_Q_TAGGED:
1462 scsi_adjust_queue_depth(dev->scsi_device,
1464 dev->openings + dev->active);
1468 * We allow the OS to queue 2 untagged transactions to
1469 * us at any time even though we can only execute them
1470 * serially on the controller/device. This should
1471 * remove some latency.
1473 scsi_adjust_queue_depth(dev->scsi_device,
1482 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1483 int lun, u_int tag, role_t role, uint32_t status)
1489 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1491 static int warned_user;
1495 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1496 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
1497 if (warned_user == 0) {
1500 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1501 "aic7xxx: for installed controllers. Using defaults\n"
1502 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1503 "aic7xxx: the aic7xxx_osm..c source file.\n");
1506 tags = AHC_MAX_QUEUE;
1508 adapter_tag_info_t *tag_info;
1510 tag_info = &aic7xxx_tag_info[ahc->unit];
1511 tags = tag_info->tag_commands[devinfo->target_offset];
1512 if (tags > AHC_MAX_QUEUE)
1513 tags = AHC_MAX_QUEUE;
1520 * Determines the queue depth for a given device.
1523 ahc_linux_device_queue_depth(struct ahc_softc *ahc,
1524 struct ahc_linux_device *dev)
1526 struct ahc_devinfo devinfo;
1529 ahc_compile_devinfo(&devinfo,
1530 dev->target->channel == 0
1531 ? ahc->our_id : ahc->our_id_b,
1532 dev->target->target, dev->lun,
1533 dev->target->channel == 0 ? 'A' : 'B',
1535 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1537 && dev->scsi_device != NULL
1538 && dev->scsi_device->tagged_supported != 0) {
1540 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
1541 ahc_print_devinfo(ahc, &devinfo);
1542 printf("Tagged Queuing enabled. Depth %d\n", tags);
1544 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
1549 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1550 struct scsi_cmnd *cmd)
1553 struct hardware_scb *hscb;
1554 struct ahc_initiator_tinfo *tinfo;
1555 struct ahc_tmode_tstate *tstate;
1557 struct scb_tailq *untagged_q = NULL;
1560 * Schedule us to run later. The only reason we are not
1561 * running is because the whole controller Q is frozen.
1563 if (ahc->platform_data->qfrozen != 0)
1564 return SCSI_MLQUEUE_HOST_BUSY;
1567 * We only allow one untagged transaction
1568 * per target in the initiator role unless
1569 * we are storing a full busy target *lun*
1570 * table in SCB space.
1572 if (!blk_rq_tagged(cmd->request)
1573 && (ahc->features & AHC_SCB_BTT) == 0) {
1576 target_offset = cmd->device->id + cmd->device->channel * 8;
1577 untagged_q = &(ahc->untagged_queues[target_offset]);
1578 if (!TAILQ_EMPTY(untagged_q))
1579 /* if we're already executing an untagged command
1580 * we're busy to another */
1581 return SCSI_MLQUEUE_DEVICE_BUSY;
1585 * Get an scb to use.
1587 if ((scb = ahc_get_scb(ahc)) == NULL) {
1588 ahc->flags |= AHC_RESOURCE_SHORTAGE;
1589 return SCSI_MLQUEUE_HOST_BUSY;
1593 scb->platform_data->dev = dev;
1595 cmd->host_scribble = (char *)scb;
1598 * Fill out basics of the HSCB.
1601 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1602 hscb->lun = cmd->device->lun;
1603 mask = SCB_GET_TARGET_MASK(ahc, scb);
1604 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1605 SCB_GET_OUR_ID(scb),
1606 SCB_GET_TARGET(ahc, scb), &tstate);
1607 hscb->scsirate = tinfo->scsirate;
1608 hscb->scsioffset = tinfo->curr.offset;
1609 if ((tstate->ultraenb & mask) != 0)
1610 hscb->control |= ULTRAENB;
1612 if ((ahc->user_discenable & mask) != 0)
1613 hscb->control |= DISCENB;
1615 if ((tstate->auto_negotiate & mask) != 0) {
1616 scb->flags |= SCB_AUTO_NEGOTIATE;
1617 scb->hscb->control |= MK_MESSAGE;
1620 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1622 uint8_t tag_msgs[2];
1624 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1625 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1626 hscb->control |= tag_msgs[0];
1627 if (tag_msgs[0] == MSG_ORDERED_TASK)
1628 dev->commands_since_idle_or_otag = 0;
1629 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1630 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1631 hscb->control |= MSG_ORDERED_TASK;
1632 dev->commands_since_idle_or_otag = 0;
1634 hscb->control |= MSG_SIMPLE_TASK;
1638 hscb->cdb_len = cmd->cmd_len;
1639 if (hscb->cdb_len <= 12) {
1640 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1642 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1643 scb->flags |= SCB_CDB32_PTR;
1646 scb->platform_data->xfer_len = 0;
1647 ahc_set_residual(scb, 0);
1648 ahc_set_sense_residual(scb, 0);
1650 if (cmd->use_sg != 0) {
1651 struct ahc_dma_seg *sg;
1652 struct scatterlist *cur_seg;
1653 struct scatterlist *end_seg;
1656 cur_seg = (struct scatterlist *)cmd->request_buffer;
1657 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
1658 cmd->sc_data_direction);
1659 end_seg = cur_seg + nseg;
1660 /* Copy the segments into the SG list. */
1663 * The sg_count may be larger than nseg if
1664 * a transfer crosses a 32bit page.
1666 while (cur_seg < end_seg) {
1671 addr = sg_dma_address(cur_seg);
1672 len = sg_dma_len(cur_seg);
1673 consumed = ahc_linux_map_seg(ahc, scb,
1676 scb->sg_count += consumed;
1680 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1683 * Reset the sg list pointer.
1686 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1689 * Copy the first SG into the "current"
1690 * data pointer area.
1692 scb->hscb->dataptr = scb->sg_list->addr;
1693 scb->hscb->datacnt = scb->sg_list->len;
1694 } else if (cmd->request_bufflen != 0) {
1695 struct ahc_dma_seg *sg;
1699 addr = pci_map_single(ahc->dev_softc,
1700 cmd->request_buffer,
1701 cmd->request_bufflen,
1702 cmd->sc_data_direction);
1703 scb->platform_data->buf_busaddr = addr;
1704 scb->sg_count = ahc_linux_map_seg(ahc, scb,
1706 cmd->request_bufflen);
1707 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1710 * Reset the sg list pointer.
1713 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1716 * Copy the first SG into the "current"
1717 * data pointer area.
1719 scb->hscb->dataptr = sg->addr;
1720 scb->hscb->datacnt = sg->len;
1722 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1723 scb->hscb->dataptr = 0;
1724 scb->hscb->datacnt = 0;
1728 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1731 dev->commands_issued++;
1732 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1733 dev->commands_since_idle_or_otag++;
1735 scb->flags |= SCB_ACTIVE;
1737 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1738 scb->flags |= SCB_UNTAGGEDQ;
1740 ahc_queue_scb(ahc, scb);
1745 * SCSI controller interrupt handler.
1748 ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1750 struct ahc_softc *ahc;
1754 ahc = (struct ahc_softc *) dev_id;
1755 ahc_lock(ahc, &flags);
1756 ours = ahc_intr(ahc);
1757 ahc_unlock(ahc, &flags);
1758 return IRQ_RETVAL(ours);
1762 ahc_platform_flushwork(struct ahc_softc *ahc)
1767 static struct ahc_linux_target*
1768 ahc_linux_alloc_target(struct ahc_softc *ahc, u_int channel, u_int target)
1770 struct ahc_linux_target *targ;
1771 u_int target_offset;
1773 target_offset = target;
1777 targ = malloc(sizeof(*targ), M_DEVBUG, M_NOWAIT);
1780 memset(targ, 0, sizeof(*targ));
1781 targ->channel = channel;
1782 targ->target = target;
1784 ahc->platform_data->targets[target_offset] = targ;
1789 ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ)
1791 struct ahc_devinfo devinfo;
1792 struct ahc_initiator_tinfo *tinfo;
1793 struct ahc_tmode_tstate *tstate;
1795 u_int target_offset;
1799 * Force a negotiation to async/narrow on any
1800 * future command to this device unless a bus
1801 * reset occurs between now and that command.
1803 channel = 'A' + targ->channel;
1804 our_id = ahc->our_id;
1805 target_offset = targ->target;
1806 if (targ->channel != 0) {
1808 our_id = ahc->our_id_b;
1810 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1811 targ->target, &tstate);
1812 ahc_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD,
1813 channel, ROLE_INITIATOR);
1814 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
1815 AHC_TRANS_GOAL, /*paused*/FALSE);
1816 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
1817 AHC_TRANS_GOAL, /*paused*/FALSE);
1818 ahc_update_neg_request(ahc, &devinfo, tstate, tinfo, AHC_NEG_ALWAYS);
1819 ahc->platform_data->targets[target_offset] = NULL;
1820 free(targ, M_DEVBUF);
1823 static struct ahc_linux_device*
1824 ahc_linux_alloc_device(struct ahc_softc *ahc,
1825 struct ahc_linux_target *targ, u_int lun)
1827 struct ahc_linux_device *dev;
1829 dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT);
1832 memset(dev, 0, sizeof(*dev));
1837 * We start out life using untagged
1838 * transactions of which we allow one.
1843 * Set maxtags to 0. This will be changed if we
1844 * later determine that we are dealing with
1845 * a tagged queuing capable device.
1850 targ->devices[lun] = dev;
1855 ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev)
1857 struct ahc_linux_target *targ;
1860 targ->devices[dev->lun] = NULL;
1861 free(dev, M_DEVBUF);
1863 if (targ->refcount == 0)
1864 ahc_linux_free_target(ahc, targ);
1868 ahc_send_async(struct ahc_softc *ahc, char channel,
1869 u_int target, u_int lun, ac_code code, void *arg)
1872 case AC_TRANSFER_NEG:
1875 struct ahc_linux_target *targ;
1876 struct info_str info;
1877 struct ahc_initiator_tinfo *tinfo;
1878 struct ahc_tmode_tstate *tstate;
1882 info.length = sizeof(buf);
1885 tinfo = ahc_fetch_transinfo(ahc, channel,
1886 channel == 'A' ? ahc->our_id
1891 * Don't bother reporting results while
1892 * negotiations are still pending.
1894 if (tinfo->curr.period != tinfo->goal.period
1895 || tinfo->curr.width != tinfo->goal.width
1896 || tinfo->curr.offset != tinfo->goal.offset
1897 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1898 if (bootverbose == 0)
1902 * Don't bother reporting results that
1903 * are identical to those last reported.
1905 target_offset = target;
1908 targ = ahc->platform_data->targets[target_offset];
1911 if (tinfo->curr.period == targ->last_tinfo.period
1912 && tinfo->curr.width == targ->last_tinfo.width
1913 && tinfo->curr.offset == targ->last_tinfo.offset
1914 && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options)
1915 if (bootverbose == 0)
1918 targ->last_tinfo.period = tinfo->curr.period;
1919 targ->last_tinfo.width = tinfo->curr.width;
1920 targ->last_tinfo.offset = tinfo->curr.offset;
1921 targ->last_tinfo.ppr_options = tinfo->curr.ppr_options;
1923 printf("(%s:%c:", ahc_name(ahc), channel);
1924 if (target == CAM_TARGET_WILDCARD)
1927 printf("%d): ", target);
1928 ahc_format_transinfo(&info, &tinfo->curr);
1929 if (info.pos < info.length)
1930 *info.buffer = '\0';
1932 buf[info.length - 1] = '\0';
1938 WARN_ON(lun != CAM_LUN_WILDCARD);
1939 scsi_report_device_reset(ahc->platform_data->host,
1940 channel - 'A', target);
1944 if (ahc->platform_data->host != NULL) {
1945 scsi_report_bus_reset(ahc->platform_data->host,
1950 panic("ahc_send_async: Unexpected async event");
1955 * Calls the higher level scsi done function and frees the scb.
1958 ahc_done(struct ahc_softc *ahc, struct scb *scb)
1960 struct scsi_cmnd *cmd;
1961 struct ahc_linux_device *dev;
1963 LIST_REMOVE(scb, pending_links);
1964 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1965 struct scb_tailq *untagged_q;
1968 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1969 untagged_q = &(ahc->untagged_queues[target_offset]);
1970 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1971 BUG_ON(!TAILQ_EMPTY(untagged_q));
1974 if ((scb->flags & SCB_ACTIVE) == 0) {
1975 printf("SCB %d done'd twice\n", scb->hscb->tag);
1976 ahc_dump_card_state(ahc);
1977 panic("Stopping for safety");
1980 dev = scb->platform_data->dev;
1983 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1984 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1987 ahc_linux_unmap_scb(ahc, scb);
1990 * Guard against stale sense data.
1991 * The Linux mid-layer assumes that sense
1992 * was retrieved anytime the first byte of
1993 * the sense buffer looks "sane".
1995 cmd->sense_buffer[0] = 0;
1996 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1997 uint32_t amount_xferred;
2000 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
2001 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
2003 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
2004 ahc_print_path(ahc, scb);
2005 printf("Set CAM_UNCOR_PARITY\n");
2008 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
2009 #ifdef AHC_REPORT_UNDERFLOWS
2011 * This code is disabled by default as some
2012 * clients of the SCSI system do not properly
2013 * initialize the underflow parameter. This
2014 * results in spurious termination of commands
2015 * that complete as expected (e.g. underflow is
2016 * allowed as command can return variable amounts
2019 } else if (amount_xferred < scb->io_ctx->underflow) {
2022 ahc_print_path(ahc, scb);
2024 for (i = 0; i < scb->io_ctx->cmd_len; i++)
2025 printf(" 0x%x", scb->io_ctx->cmnd[i]);
2027 ahc_print_path(ahc, scb);
2028 printf("Saw underflow (%ld of %ld bytes). "
2029 "Treated as error\n",
2030 ahc_get_residual(scb),
2031 ahc_get_transfer_length(scb));
2032 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
2035 ahc_set_transaction_status(scb, CAM_REQ_CMP);
2037 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
2038 ahc_linux_handle_scsi_status(ahc, dev, scb);
2041 if (dev->openings == 1
2042 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
2043 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
2044 dev->tag_success_count++;
2046 * Some devices deal with temporary internal resource
2047 * shortages by returning queue full. When the queue
2048 * full occurrs, we throttle back. Slowly try to get
2049 * back to our previous queue depth.
2051 if ((dev->openings + dev->active) < dev->maxtags
2052 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
2053 dev->tag_success_count = 0;
2057 if (dev->active == 0)
2058 dev->commands_since_idle_or_otag = 0;
2060 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
2061 printf("Recovery SCB completes\n");
2062 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
2063 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
2064 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
2065 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2066 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2067 up(&ahc->platform_data->eh_sem);
2071 ahc_free_scb(ahc, scb);
2072 ahc_linux_queue_cmd_complete(ahc, cmd);
2076 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
2077 struct ahc_linux_device *dev, struct scb *scb)
2079 struct ahc_devinfo devinfo;
2081 ahc_compile_devinfo(&devinfo,
2083 dev->target->target, dev->lun,
2084 dev->target->channel == 0 ? 'A' : 'B',
2088 * We don't currently trust the mid-layer to
2089 * properly deal with queue full or busy. So,
2090 * when one occurs, we tell the mid-layer to
2091 * unconditionally requeue the command to us
2092 * so that we can retry it ourselves. We also
2093 * implement our own throttling mechanism so
2094 * we don't clobber the device with too many
2097 switch (ahc_get_scsi_status(scb)) {
2100 case SCSI_STATUS_CHECK_COND:
2101 case SCSI_STATUS_CMD_TERMINATED:
2103 struct scsi_cmnd *cmd;
2106 * Copy sense information to the OS's cmd
2107 * structure if it is available.
2110 if (scb->flags & SCB_SENSE) {
2113 sense_size = MIN(sizeof(struct scsi_sense_data)
2114 - ahc_get_sense_residual(scb),
2115 sizeof(cmd->sense_buffer));
2116 memcpy(cmd->sense_buffer,
2117 ahc_get_sense_buf(ahc, scb), sense_size);
2118 if (sense_size < sizeof(cmd->sense_buffer))
2119 memset(&cmd->sense_buffer[sense_size], 0,
2120 sizeof(cmd->sense_buffer) - sense_size);
2121 cmd->result |= (DRIVER_SENSE << 24);
2123 if (ahc_debug & AHC_SHOW_SENSE) {
2126 printf("Copied %d bytes of sense data:",
2128 for (i = 0; i < sense_size; i++) {
2131 printf("0x%x ", cmd->sense_buffer[i]);
2139 case SCSI_STATUS_QUEUE_FULL:
2142 * By the time the core driver has returned this
2143 * command, all other commands that were queued
2144 * to us but not the device have been returned.
2145 * This ensures that dev->active is equal to
2146 * the number of commands actually queued to
2149 dev->tag_success_count = 0;
2150 if (dev->active != 0) {
2152 * Drop our opening count to the number
2153 * of commands currently outstanding.
2157 ahc_print_path(ahc, scb);
2158 printf("Dropping tag count to %d\n", dev->active);
2160 if (dev->active == dev->tags_on_last_queuefull) {
2162 dev->last_queuefull_same_count++;
2164 * If we repeatedly see a queue full
2165 * at the same queue depth, this
2166 * device has a fixed number of tag
2167 * slots. Lock in this tag depth
2168 * so we stop seeing queue fulls from
2171 if (dev->last_queuefull_same_count
2172 == AHC_LOCK_TAGS_COUNT) {
2173 dev->maxtags = dev->active;
2174 ahc_print_path(ahc, scb);
2175 printf("Locking max tag count at %d\n",
2179 dev->tags_on_last_queuefull = dev->active;
2180 dev->last_queuefull_same_count = 0;
2182 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
2183 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
2184 ahc_platform_set_tags(ahc, &devinfo,
2185 (dev->flags & AHC_DEV_Q_BASIC)
2186 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
2190 * Drop down to a single opening, and treat this
2191 * as if the target returned BUSY SCSI status.
2194 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
2195 ahc_platform_set_tags(ahc, &devinfo,
2196 (dev->flags & AHC_DEV_Q_BASIC)
2197 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
2204 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
2207 * Map CAM error codes into Linux Error codes. We
2208 * avoid the conversion so that the DV code has the
2209 * full error information available when making
2210 * state change decisions.
2215 switch (ahc_cmd_get_transaction_status(cmd)) {
2216 case CAM_REQ_INPROG:
2218 case CAM_SCSI_STATUS_ERROR:
2219 new_status = DID_OK;
2221 case CAM_REQ_ABORTED:
2222 new_status = DID_ABORT;
2225 new_status = DID_BUS_BUSY;
2227 case CAM_REQ_INVALID:
2228 case CAM_PATH_INVALID:
2229 new_status = DID_BAD_TARGET;
2231 case CAM_SEL_TIMEOUT:
2232 new_status = DID_NO_CONNECT;
2234 case CAM_SCSI_BUS_RESET:
2236 new_status = DID_RESET;
2238 case CAM_UNCOR_PARITY:
2239 new_status = DID_PARITY;
2241 case CAM_CMD_TIMEOUT:
2242 new_status = DID_TIME_OUT;
2245 case CAM_REQ_CMP_ERR:
2246 case CAM_AUTOSENSE_FAIL:
2248 case CAM_DATA_RUN_ERR:
2249 case CAM_UNEXP_BUSFREE:
2250 case CAM_SEQUENCE_FAIL:
2251 case CAM_CCB_LEN_ERR:
2252 case CAM_PROVIDE_FAIL:
2253 case CAM_REQ_TERMIO:
2254 case CAM_UNREC_HBA_ERROR:
2255 case CAM_REQ_TOO_BIG:
2256 new_status = DID_ERROR;
2258 case CAM_REQUEUE_REQ:
2259 new_status = DID_REQUEUE;
2262 /* We should never get here */
2263 new_status = DID_ERROR;
2267 ahc_cmd_set_transaction_status(cmd, new_status);
2270 cmd->scsi_done(cmd);
2274 ahc_linux_sem_timeout(u_long arg)
2276 struct ahc_softc *ahc;
2279 ahc = (struct ahc_softc *)arg;
2282 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2283 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2284 up(&ahc->platform_data->eh_sem);
2286 ahc_unlock(ahc, &s);
2290 ahc_linux_freeze_simq(struct ahc_softc *ahc)
2292 ahc->platform_data->qfrozen++;
2293 if (ahc->platform_data->qfrozen == 1) {
2294 scsi_block_requests(ahc->platform_data->host);
2296 /* XXX What about Twin channels? */
2297 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2298 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2299 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2304 ahc_linux_release_simq(u_long arg)
2306 struct ahc_softc *ahc;
2310 ahc = (struct ahc_softc *)arg;
2314 if (ahc->platform_data->qfrozen > 0)
2315 ahc->platform_data->qfrozen--;
2316 if (ahc->platform_data->qfrozen == 0)
2318 ahc_unlock(ahc, &s);
2320 * There is still a race here. The mid-layer
2321 * should keep its own freeze count and use
2322 * a bottom half handler to run the queues
2323 * so we can unblock with our own lock held.
2326 scsi_unblock_requests(ahc->platform_data->host);
2330 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2332 struct ahc_softc *ahc;
2333 struct ahc_linux_device *dev;
2334 struct scb *pending_scb;
2336 u_int active_scb_index;
2349 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2351 printf("%s:%d:%d:%d: Attempting to queue a%s message\n",
2352 ahc_name(ahc), cmd->device->channel,
2353 cmd->device->id, cmd->device->lun,
2354 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2357 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2358 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2362 * First determine if we currently own this command.
2363 * Start by searching the device queue. If not found
2364 * there, check the pending_scb list. If not found
2365 * at all, and the system wanted us to just abort the
2366 * command, return success.
2368 dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id,
2373 * No target device for this command exists,
2374 * so we must not still own the command.
2376 printf("%s:%d:%d:%d: Is not an active device\n",
2377 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2383 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2384 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2385 cmd->device->channel + 'A',
2387 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2388 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2389 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2396 * See if we can find a matching cmd in the pending list.
2398 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2399 if (pending_scb->io_ctx == cmd)
2403 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2405 /* Any SCB for this device will do for a target reset */
2406 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2407 if (ahc_match_scb(ahc, pending_scb, cmd->device->id,
2408 cmd->device->channel + 'A',
2410 SCB_LIST_NULL, ROLE_INITIATOR) == 0)
2415 if (pending_scb == NULL) {
2416 printf("%s:%d:%d:%d: Command not found\n",
2417 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2422 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2424 * We can't queue two recovery actions using the same SCB
2431 * Ensure that the card doesn't do anything
2432 * behind our back and that we didn't "just" miss
2433 * an interrupt that would affect this cmd.
2435 was_paused = ahc_is_paused(ahc);
2436 ahc_pause_and_flushwork(ahc);
2439 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2440 printf("%s:%d:%d:%d: Command already completed\n",
2441 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2446 printf("%s: At time of recovery, card was %spaused\n",
2447 ahc_name(ahc), was_paused ? "" : "not ");
2448 ahc_dump_card_state(ahc);
2450 disconnected = TRUE;
2451 if (flag == SCB_ABORT) {
2452 if (ahc_search_qinfifo(ahc, cmd->device->id,
2453 cmd->device->channel + 'A',
2455 pending_scb->hscb->tag,
2456 ROLE_INITIATOR, CAM_REQ_ABORTED,
2457 SEARCH_COMPLETE) > 0) {
2458 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2459 ahc_name(ahc), cmd->device->channel,
2460 cmd->device->id, cmd->device->lun);
2464 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2465 cmd->device->channel + 'A',
2466 cmd->device->lun, pending_scb->hscb->tag,
2467 ROLE_INITIATOR, /*status*/0,
2468 SEARCH_COUNT) > 0) {
2469 disconnected = FALSE;
2472 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2473 struct scb *bus_scb;
2475 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2476 if (bus_scb == pending_scb)
2477 disconnected = FALSE;
2478 else if (flag != SCB_ABORT
2479 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2480 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2481 disconnected = FALSE;
2485 * At this point, pending_scb is the scb associated with the
2486 * passed in command. That command is currently active on the
2487 * bus, is in the disconnected state, or we're hoping to find
2488 * a command for the same target active on the bus to abuse to
2489 * send a BDR. Queue the appropriate message based on which of
2490 * these states we are in.
2492 last_phase = ahc_inb(ahc, LASTPHASE);
2493 saved_scbptr = ahc_inb(ahc, SCBPTR);
2494 active_scb_index = ahc_inb(ahc, SCB_TAG);
2495 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2496 if (last_phase != P_BUSFREE
2497 && (pending_scb->hscb->tag == active_scb_index
2498 || (flag == SCB_DEVICE_RESET
2499 && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) {
2502 * We're active on the bus, so assert ATN
2503 * and hope that the target responds.
2505 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2506 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2507 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2508 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2509 printf("%s:%d:%d:%d: Device is active, asserting ATN\n",
2510 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2513 } else if (disconnected) {
2516 * Actually re-queue this SCB in an attempt
2517 * to select the device before it reconnects.
2518 * In either case (selection or reselection),
2519 * we will now issue the approprate message
2520 * to the timed-out device.
2522 * Set the MK_MESSAGE control bit indicating
2523 * that we desire to send a message. We
2524 * also set the disconnected flag since
2525 * in the paging case there is no guarantee
2526 * that our SCB control byte matches the
2527 * version on the card. We don't want the
2528 * sequencer to abort the command thinking
2529 * an unsolicited reselection occurred.
2531 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2532 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2535 * Remove any cached copy of this SCB in the
2536 * disconnected list in preparation for the
2537 * queuing of our abort SCB. We use the
2538 * same element in the SCB, SCB_NEXT, for
2539 * both the qinfifo and the disconnected list.
2541 ahc_search_disc_list(ahc, cmd->device->id,
2542 cmd->device->channel + 'A',
2543 cmd->device->lun, pending_scb->hscb->tag,
2544 /*stop_on_first*/TRUE,
2546 /*save_state*/FALSE);
2549 * In the non-paging case, the sequencer will
2550 * never re-reference the in-core SCB.
2551 * To make sure we are notified during
2552 * reslection, set the MK_MESSAGE flag in
2553 * the card's copy of the SCB.
2555 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2556 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2557 ahc_outb(ahc, SCB_CONTROL,
2558 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2562 * Clear out any entries in the QINFIFO first
2563 * so we are the next SCB for this target
2566 ahc_search_qinfifo(ahc, cmd->device->id,
2567 cmd->device->channel + 'A',
2568 cmd->device->lun, SCB_LIST_NULL,
2569 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2571 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2572 ahc_outb(ahc, SCBPTR, saved_scbptr);
2573 ahc_print_path(ahc, pending_scb);
2574 printf("Device is disconnected, re-queuing SCB\n");
2577 printf("%s:%d:%d:%d: Unable to deliver message\n",
2578 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2586 * Our assumption is that if we don't have the command, no
2587 * recovery action was required, so we return success. Again,
2588 * the semantics of the mid-layer recovery engine are not
2589 * well defined, so this may change in time.
2596 struct timer_list timer;
2599 ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
2600 spin_unlock_irq(&ahc->platform_data->spin_lock);
2602 timer.data = (u_long)ahc;
2603 timer.expires = jiffies + (5 * HZ);
2604 timer.function = ahc_linux_sem_timeout;
2606 printf("Recovery code sleeping\n");
2607 down(&ahc->platform_data->eh_sem);
2608 printf("Recovery code awake\n");
2609 ret = del_timer_sync(&timer);
2611 printf("Timer Expired\n");
2614 spin_lock_irq(&ahc->platform_data->spin_lock);
2620 ahc_platform_dump_card_state(struct ahc_softc *ahc)
2624 static void ahc_linux_exit(void);
2626 static void ahc_linux_get_width(struct scsi_target *starget)
2628 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2629 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2630 struct ahc_tmode_tstate *tstate;
2631 struct ahc_initiator_tinfo *tinfo
2632 = ahc_fetch_transinfo(ahc,
2633 starget->channel + 'A',
2634 shost->this_id, starget->id, &tstate);
2635 spi_width(starget) = tinfo->curr.width;
2638 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2640 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2641 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2642 struct ahc_devinfo devinfo;
2643 unsigned long flags;
2645 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2646 starget->channel + 'A', ROLE_INITIATOR);
2647 ahc_lock(ahc, &flags);
2648 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2649 ahc_unlock(ahc, &flags);
2652 static void ahc_linux_get_period(struct scsi_target *starget)
2654 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2655 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2656 struct ahc_tmode_tstate *tstate;
2657 struct ahc_initiator_tinfo *tinfo
2658 = ahc_fetch_transinfo(ahc,
2659 starget->channel + 'A',
2660 shost->this_id, starget->id, &tstate);
2661 spi_period(starget) = tinfo->curr.period;
2664 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2666 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2667 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2668 struct ahc_tmode_tstate *tstate;
2669 struct ahc_initiator_tinfo *tinfo
2670 = ahc_fetch_transinfo(ahc,
2671 starget->channel + 'A',
2672 shost->this_id, starget->id, &tstate);
2673 struct ahc_devinfo devinfo;
2674 unsigned int ppr_options = tinfo->curr.ppr_options;
2675 unsigned long flags;
2676 unsigned long offset = tinfo->curr.offset;
2677 struct ahc_syncrate *syncrate;
2680 offset = MAX_OFFSET;
2683 period = 9; /* 12.5ns is our minimum */
2685 ppr_options |= MSG_EXT_PPR_DT_REQ;
2687 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2688 starget->channel + 'A', ROLE_INITIATOR);
2690 /* all PPR requests apart from QAS require wide transfers */
2691 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2692 ahc_linux_get_width(starget);
2693 if (spi_width(starget) == 0)
2694 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2697 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2698 ahc_lock(ahc, &flags);
2699 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2700 ppr_options, AHC_TRANS_GOAL, FALSE);
2701 ahc_unlock(ahc, &flags);
2704 static void ahc_linux_get_offset(struct scsi_target *starget)
2706 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2707 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2708 struct ahc_tmode_tstate *tstate;
2709 struct ahc_initiator_tinfo *tinfo
2710 = ahc_fetch_transinfo(ahc,
2711 starget->channel + 'A',
2712 shost->this_id, starget->id, &tstate);
2713 spi_offset(starget) = tinfo->curr.offset;
2716 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2718 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2719 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2720 struct ahc_tmode_tstate *tstate;
2721 struct ahc_initiator_tinfo *tinfo
2722 = ahc_fetch_transinfo(ahc,
2723 starget->channel + 'A',
2724 shost->this_id, starget->id, &tstate);
2725 struct ahc_devinfo devinfo;
2726 unsigned int ppr_options = 0;
2727 unsigned int period = 0;
2728 unsigned long flags;
2729 struct ahc_syncrate *syncrate = NULL;
2731 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2732 starget->channel + 'A', ROLE_INITIATOR);
2734 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2735 period = tinfo->curr.period;
2736 ppr_options = tinfo->curr.ppr_options;
2738 ahc_lock(ahc, &flags);
2739 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2740 ppr_options, AHC_TRANS_GOAL, FALSE);
2741 ahc_unlock(ahc, &flags);
2744 static void ahc_linux_get_dt(struct scsi_target *starget)
2746 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2747 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2748 struct ahc_tmode_tstate *tstate;
2749 struct ahc_initiator_tinfo *tinfo
2750 = ahc_fetch_transinfo(ahc,
2751 starget->channel + 'A',
2752 shost->this_id, starget->id, &tstate);
2753 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ;
2756 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2758 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2759 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2760 struct ahc_tmode_tstate *tstate;
2761 struct ahc_initiator_tinfo *tinfo
2762 = ahc_fetch_transinfo(ahc,
2763 starget->channel + 'A',
2764 shost->this_id, starget->id, &tstate);
2765 struct ahc_devinfo devinfo;
2766 unsigned int ppr_options = tinfo->curr.ppr_options
2767 & ~MSG_EXT_PPR_DT_REQ;
2768 unsigned int period = tinfo->curr.period;
2769 unsigned long flags;
2770 struct ahc_syncrate *syncrate;
2773 period = 9; /* 12.5ns is the only period valid for DT */
2774 ppr_options |= MSG_EXT_PPR_DT_REQ;
2775 } else if (period == 9)
2776 period = 10; /* if resetting DT, period must be >= 25ns */
2778 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2779 starget->channel + 'A', ROLE_INITIATOR);
2780 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT);
2781 ahc_lock(ahc, &flags);
2782 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
2783 ppr_options, AHC_TRANS_GOAL, FALSE);
2784 ahc_unlock(ahc, &flags);
2787 static void ahc_linux_get_qas(struct scsi_target *starget)
2789 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2790 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2791 struct ahc_tmode_tstate *tstate;
2792 struct ahc_initiator_tinfo *tinfo
2793 = ahc_fetch_transinfo(ahc,
2794 starget->channel + 'A',
2795 shost->this_id, starget->id, &tstate);
2796 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ;
2799 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2801 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2802 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2803 struct ahc_tmode_tstate *tstate;
2804 struct ahc_initiator_tinfo *tinfo
2805 = ahc_fetch_transinfo(ahc,
2806 starget->channel + 'A',
2807 shost->this_id, starget->id, &tstate);
2808 struct ahc_devinfo devinfo;
2809 unsigned int ppr_options = tinfo->curr.ppr_options
2810 & ~MSG_EXT_PPR_QAS_REQ;
2811 unsigned int period = tinfo->curr.period;
2812 unsigned long flags;
2813 struct ahc_syncrate *syncrate;
2816 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2818 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2819 starget->channel + 'A', ROLE_INITIATOR);
2820 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2821 ahc_lock(ahc, &flags);
2822 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
2823 ppr_options, AHC_TRANS_GOAL, FALSE);
2824 ahc_unlock(ahc, &flags);
2827 static void ahc_linux_get_iu(struct scsi_target *starget)
2829 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2830 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2831 struct ahc_tmode_tstate *tstate;
2832 struct ahc_initiator_tinfo *tinfo
2833 = ahc_fetch_transinfo(ahc,
2834 starget->channel + 'A',
2835 shost->this_id, starget->id, &tstate);
2836 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ;
2839 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2841 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2842 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2843 struct ahc_tmode_tstate *tstate;
2844 struct ahc_initiator_tinfo *tinfo
2845 = ahc_fetch_transinfo(ahc,
2846 starget->channel + 'A',
2847 shost->this_id, starget->id, &tstate);
2848 struct ahc_devinfo devinfo;
2849 unsigned int ppr_options = tinfo->curr.ppr_options
2850 & ~MSG_EXT_PPR_IU_REQ;
2851 unsigned int period = tinfo->curr.period;
2852 unsigned long flags;
2853 struct ahc_syncrate *syncrate;
2856 ppr_options |= MSG_EXT_PPR_IU_REQ;
2858 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2859 starget->channel + 'A', ROLE_INITIATOR);
2860 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2861 ahc_lock(ahc, &flags);
2862 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset,
2863 ppr_options, AHC_TRANS_GOAL, FALSE);
2864 ahc_unlock(ahc, &flags);
2867 static struct spi_function_template ahc_linux_transport_functions = {
2868 .get_offset = ahc_linux_get_offset,
2869 .set_offset = ahc_linux_set_offset,
2871 .get_period = ahc_linux_get_period,
2872 .set_period = ahc_linux_set_period,
2874 .get_width = ahc_linux_get_width,
2875 .set_width = ahc_linux_set_width,
2877 .get_dt = ahc_linux_get_dt,
2878 .set_dt = ahc_linux_set_dt,
2880 .get_iu = ahc_linux_get_iu,
2881 .set_iu = ahc_linux_set_iu,
2883 .get_qas = ahc_linux_get_qas,
2884 .set_qas = ahc_linux_set_qas,
2891 ahc_linux_init(void)
2893 ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions);
2894 if (!ahc_linux_transport_template)
2896 if (ahc_linux_detect(&aic7xxx_driver_template))
2898 spi_release_transport(ahc_linux_transport_template);
2904 ahc_linux_exit(void)
2906 ahc_linux_pci_exit();
2907 ahc_linux_eisa_exit();
2908 spi_release_transport(ahc_linux_transport_template);
2911 module_init(ahc_linux_init);
2912 module_exit(ahc_linux_exit);