2 * Adaptec AIC7xxx device driver for Linux.
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
6 * Copyright (c) 1994 John Aycock
7 * The University of Calgary Department of Computer Science.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, write to
21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
24 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
25 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
26 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
27 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
28 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
29 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
30 * ANSI SCSI-2 specification (draft 10c), ...
32 * --------------------------------------------------------------------------
34 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
36 * Substantially modified to include support for wide and twin bus
37 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
38 * SCB paging, and other rework of the code.
40 * --------------------------------------------------------------------------
41 * Copyright (c) 1994-2000 Justin T. Gibbs.
42 * Copyright (c) 2000-2001 Adaptec Inc.
43 * All rights reserved.
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions, and the following disclaimer,
50 * without modification.
51 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
52 * substantially similar to the "NO WARRANTY" disclaimer below
53 * ("Disclaimer") and any redistribution must be conditioned upon
54 * including a substantially similar Disclaimer requirement for further
55 * binary redistribution.
56 * 3. Neither the names of the above-listed copyright holders nor the names
57 * of any contributors may be used to endorse or promote products derived
58 * from this software without specific prior written permission.
60 * Alternatively, this software may be distributed under the terms of the
61 * GNU General Public License ("GPL") version 2 as published by the Free
62 * Software Foundation.
65 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
66 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
67 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
68 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
69 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
73 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
74 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
75 * POSSIBILITY OF SUCH DAMAGES.
77 *---------------------------------------------------------------------------
79 * Thanks also go to (in alphabetical order) the following:
81 * Rory Bolt - Sequencer bug fixes
82 * Jay Estabrook - Initial DEC Alpha support
83 * Doug Ledford - Much needed abort/reset bug fixes
84 * Kai Makisara - DMAing of SCBs
86 * A Boot time option was also added for not resetting the scsi bus.
88 * Form: aic7xxx=extended
92 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
94 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
98 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
100 * Copyright (c) 1997-1999 Doug Ledford
102 * These changes are released under the same licensing terms as the FreeBSD
103 * driver written by Justin Gibbs. Please see his Copyright notice above
104 * for the exact terms and conditions covering my changes as well as the
105 * warranty statement.
107 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
108 * but are not limited to:
110 * 1: Import of the latest FreeBSD sequencer code for this driver
111 * 2: Modification of kernel code to accommodate different sequencer semantics
112 * 3: Extensive changes throughout kernel portion of driver to improve
113 * abort/reset processing and error hanndling
114 * 4: Other work contributed by various people on the Internet
115 * 5: Changes to printk information and verbosity selection code
116 * 6: General reliability related changes, especially in IRQ management
117 * 7: Modifications to the default probe/attach order for supported cards
118 * 8: SMP friendliness has been improved
122 #include "aic7xxx_osm.h"
123 #include "aic7xxx_inline.h"
124 #include <scsi/scsicam.h>
126 static struct scsi_transport_template *ahc_linux_transport_template = NULL;
128 #include <linux/init.h> /* __setup */
129 #include <linux/mm.h> /* For fetching system memory size */
130 #include <linux/blkdev.h> /* For block_size() */
131 #include <linux/delay.h> /* For ssleep/msleep */
135 * Set this to the delay in seconds after SCSI bus reset.
136 * Note, we honor this only for the initial bus reset.
137 * The scsi error recovery code performs its own bus settle
138 * delay handling for error recovery actions.
140 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
141 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
143 #define AIC7XXX_RESET_DELAY 5000
147 * Control collection of SCSI transfer statistics for the /proc filesystem.
149 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
150 * NOTE: This does affect performance since it has to maintain statistics.
152 #ifdef CONFIG_AIC7XXX_PROC_STATS
153 #define AIC7XXX_PROC_STATS
157 * To change the default number of tagged transactions allowed per-device,
158 * add a line to the lilo.conf file like:
159 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
160 * which will result in the first four devices on the first two
161 * controllers being set to a tagged queue depth of 32.
163 * The tag_commands is an array of 16 to allow for wide and twin adapters.
164 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
168 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */
169 } adapter_tag_info_t;
172 * Modify this as you see fit for your system.
174 * 0 tagged queuing disabled
175 * 1 <= n <= 253 n == max tags ever dispatched.
177 * The driver will throttle the number of commands dispatched to a
178 * device if it returns queue full. For devices with a fixed maximum
179 * queue depth, the driver will eventually determine this depth and
180 * lock it in (a console message is printed to indicate that a lock
181 * has occurred). On some devices, queue full is returned for a temporary
182 * resource shortage. These devices will return queue full at varying
183 * depths. The driver will throttle back when the queue fulls occur and
184 * attempt to slowly increase the depth over time as the device recovers
185 * from the resource shortage.
187 * In this example, the first line will disable tagged queueing for all
188 * the devices on the first probed aic7xxx adapter.
190 * The second line enables tagged queueing with 4 commands/LUN for IDs
191 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
192 * driver to attempt to use up to 64 tags for ID 1.
194 * The third line is the same as the first line.
196 * The fourth line disables tagged queueing for devices 0 and 3. It
197 * enables tagged queueing for the other IDs, with 16 commands/LUN
198 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
199 * IDs 2, 5-7, and 9-15.
203 * NOTE: The below structure is for reference only, the actual structure
204 * to modify in order to change things is just below this comment block.
205 adapter_tag_info_t aic7xxx_tag_info[] =
207 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
208 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
209 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
210 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
214 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
215 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
217 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
220 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
221 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
222 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
223 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
224 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
225 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
226 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
227 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
228 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
232 * By default, use the number of commands specified by
233 * the users kernel configuration.
235 static adapter_tag_info_t aic7xxx_tag_info[] =
237 {AIC7XXX_CONFIGED_TAG_COMMANDS},
238 {AIC7XXX_CONFIGED_TAG_COMMANDS},
239 {AIC7XXX_CONFIGED_TAG_COMMANDS},
240 {AIC7XXX_CONFIGED_TAG_COMMANDS},
241 {AIC7XXX_CONFIGED_TAG_COMMANDS},
242 {AIC7XXX_CONFIGED_TAG_COMMANDS},
243 {AIC7XXX_CONFIGED_TAG_COMMANDS},
244 {AIC7XXX_CONFIGED_TAG_COMMANDS},
245 {AIC7XXX_CONFIGED_TAG_COMMANDS},
246 {AIC7XXX_CONFIGED_TAG_COMMANDS},
247 {AIC7XXX_CONFIGED_TAG_COMMANDS},
248 {AIC7XXX_CONFIGED_TAG_COMMANDS},
249 {AIC7XXX_CONFIGED_TAG_COMMANDS},
250 {AIC7XXX_CONFIGED_TAG_COMMANDS},
251 {AIC7XXX_CONFIGED_TAG_COMMANDS},
252 {AIC7XXX_CONFIGED_TAG_COMMANDS}
256 * There should be a specific return value for this in scsi.h, but
257 * it seems that most drivers ignore it.
259 #define DID_UNDERFLOW DID_ERROR
262 ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
264 printk("(scsi%d:%c:%d:%d): ",
265 ahc->platform_data->host->host_no,
266 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X',
267 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1,
268 scb != NULL ? SCB_GET_LUN(scb) : -1);
272 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
273 * cards in the system. This should be fixed. Exceptions to this
274 * rule are noted in the comments.
278 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
279 * has no effect on any later resets that might occur due to things like
282 static uint32_t aic7xxx_no_reset;
285 * Should we force EXTENDED translation on a controller.
286 * 0 == Use whatever is in the SEEPROM or default to off
287 * 1 == Use whatever is in the SEEPROM or default to on
289 static uint32_t aic7xxx_extended;
292 * PCI bus parity checking of the Adaptec controllers. This is somewhat
293 * dubious at best. To my knowledge, this option has never actually
294 * solved a PCI parity problem, but on certain machines with broken PCI
295 * chipset configurations where stray PCI transactions with bad parity are
296 * the norm rather than the exception, the error messages can be overwelming.
297 * It's included in the driver for completeness.
298 * 0 = Shut off PCI parity check
299 * non-0 = reverse polarity pci parity checking
301 static uint32_t aic7xxx_pci_parity = ~0;
304 * There are lots of broken chipsets in the world. Some of them will
305 * violate the PCI spec when we issue byte sized memory writes to our
306 * controller. I/O mapped register access, if allowed by the given
307 * platform, will work in almost all cases.
309 uint32_t aic7xxx_allow_memio = ~0;
312 * So that we can set how long each device is given as a selection timeout.
313 * The table of values goes like this:
318 * We default to 256ms because some older devices need a longer time
319 * to respond to initial selection.
321 static uint32_t aic7xxx_seltime;
324 * Certain devices do not perform any aging on commands. Should the
325 * device be saturated by commands in one portion of the disk, it is
326 * possible for transactions on far away sectors to never be serviced.
327 * To handle these devices, we can periodically send an ordered tag to
328 * force all outstanding transactions to be serviced prior to a new
331 uint32_t aic7xxx_periodic_otag;
334 * Module information and settable options.
336 static char *aic7xxx = NULL;
338 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
339 MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
340 MODULE_LICENSE("Dual BSD/GPL");
341 MODULE_VERSION(AIC7XXX_DRIVER_VERSION);
342 module_param(aic7xxx, charp, 0444);
343 MODULE_PARM_DESC(aic7xxx,
344 "period delimited, options string.\n"
345 " verbose Enable verbose/diagnostic logging\n"
346 " allow_memio Allow device registers to be memory mapped\n"
347 " debug Bitmask of debug values to enable\n"
348 " no_probe Toggle EISA/VLB controller probing\n"
349 " probe_eisa_vl Toggle EISA/VLB controller probing\n"
350 " no_reset Supress initial bus resets\n"
351 " extended Enable extended geometry on all controllers\n"
352 " periodic_otag Send an ordered tagged transaction\n"
353 " periodically to prevent tag starvation.\n"
354 " This may be required by some older disk\n"
355 " drives or RAID arrays.\n"
356 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
357 " tag_info:<tag_str> Set per-target tag depth\n"
358 " global_tag_depth:<int> Global tag depth for every target\n"
360 " seltime:<int> Selection Timeout\n"
361 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
363 " Sample /etc/modprobe.conf line:\n"
364 " Toggle EISA/VLB probing\n"
365 " Set tag depth on Controller 1/Target 1 to 10 tags\n"
366 " Shorten the selection timeout to 128ms\n"
368 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
371 static void ahc_linux_handle_scsi_status(struct ahc_softc *,
372 struct scsi_device *,
374 static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc,
375 struct scsi_cmnd *cmd);
376 static void ahc_linux_sem_timeout(u_long arg);
377 static void ahc_linux_freeze_simq(struct ahc_softc *ahc);
378 static void ahc_linux_release_simq(u_long arg);
379 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag);
380 static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc);
381 static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc,
382 struct ahc_devinfo *devinfo);
383 static void ahc_linux_device_queue_depth(struct scsi_device *);
384 static int ahc_linux_run_command(struct ahc_softc*,
385 struct ahc_linux_device *,
387 static void ahc_linux_setup_tag_info_global(char *p);
388 static int aic7xxx_setup(char *s);
390 static int ahc_linux_unit;
393 /********************************* Inlines ************************************/
394 static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*);
396 static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
397 struct ahc_dma_seg *sg,
398 dma_addr_t addr, bus_size_t len);
401 ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb)
403 struct scsi_cmnd *cmd;
406 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE);
407 if (cmd->use_sg != 0) {
408 struct scatterlist *sg;
410 sg = (struct scatterlist *)cmd->request_buffer;
411 pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg,
412 cmd->sc_data_direction);
413 } else if (cmd->request_bufflen != 0) {
414 pci_unmap_single(ahc->dev_softc,
415 scb->platform_data->buf_busaddr,
416 cmd->request_bufflen,
417 cmd->sc_data_direction);
422 ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb,
423 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len)
427 if ((scb->sg_count + 1) > AHC_NSEG)
428 panic("Too few segs for dma mapping. "
429 "Increase AHC_NSEG\n");
432 sg->addr = ahc_htole32(addr & 0xFFFFFFFF);
433 scb->platform_data->xfer_len += len;
435 if (sizeof(dma_addr_t) > 4
436 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0)
437 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK;
439 sg->len = ahc_htole32(len);
444 * Return a string describing the driver.
447 ahc_linux_info(struct Scsi_Host *host)
449 static char buffer[512];
452 struct ahc_softc *ahc;
455 ahc = *(struct ahc_softc **)host->hostdata;
456 memset(bp, 0, sizeof(buffer));
457 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
458 strcat(bp, AIC7XXX_DRIVER_VERSION);
461 strcat(bp, ahc->description);
464 ahc_controller_info(ahc, ahc_info);
465 strcat(bp, ahc_info);
472 * Queue an SCB to the controller.
475 ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
477 struct ahc_softc *ahc;
478 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device);
479 int rtn = SCSI_MLQUEUE_HOST_BUSY;
482 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
484 ahc_lock(ahc, &flags);
485 if (ahc->platform_data->qfrozen == 0) {
486 cmd->scsi_done = scsi_done;
487 cmd->result = CAM_REQ_INPROG << 16;
488 rtn = ahc_linux_run_command(ahc, dev, cmd);
490 ahc_unlock(ahc, &flags);
495 static inline struct scsi_target **
496 ahc_linux_target_in_softc(struct scsi_target *starget)
498 struct ahc_softc *ahc =
499 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
500 unsigned int target_offset;
502 target_offset = starget->id;
503 if (starget->channel != 0)
506 return &ahc->platform_data->starget[target_offset];
510 ahc_linux_target_alloc(struct scsi_target *starget)
512 struct ahc_softc *ahc =
513 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata);
514 struct seeprom_config *sc = ahc->seep_config;
516 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
517 struct ahc_linux_target *targ = scsi_transport_target_data(starget);
518 unsigned short scsirate;
519 struct ahc_devinfo devinfo;
520 struct ahc_initiator_tinfo *tinfo;
521 struct ahc_tmode_tstate *tstate;
522 char channel = starget->channel + 'A';
523 unsigned int our_id = ahc->our_id;
524 unsigned int target_offset;
526 target_offset = starget->id;
527 if (starget->channel != 0)
530 if (starget->channel)
531 our_id = ahc->our_id_b;
533 ahc_lock(ahc, &flags);
535 BUG_ON(*ahc_targp != NULL);
537 *ahc_targp = starget;
538 memset(targ, 0, sizeof(*targ));
541 int maxsync = AHC_SYNCRATE_DT;
543 int flags = sc->device_flags[target_offset];
545 if (ahc->flags & AHC_NEWEEPROM_FMT) {
546 if (flags & CFSYNCHISULTRA)
548 } else if (flags & CFULTRAEN)
550 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
551 * change it to ultra=0, CFXFER = 0 */
552 if(ultra && (flags & CFXFER) == 0x04) {
557 if ((ahc->features & AHC_ULTRA2) != 0) {
558 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0);
560 scsirate = (flags & CFXFER) << 4;
561 maxsync = ultra ? AHC_SYNCRATE_ULTRA :
564 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
565 if (!(flags & CFSYNCH))
566 spi_max_offset(starget) = 0;
567 spi_min_period(starget) =
568 ahc_find_period(ahc, scsirate, maxsync);
570 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id,
571 starget->id, &tstate);
573 ahc_compile_devinfo(&devinfo, our_id, starget->id,
574 CAM_LUN_WILDCARD, channel,
576 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0,
577 AHC_TRANS_GOAL, /*paused*/FALSE);
578 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
579 AHC_TRANS_GOAL, /*paused*/FALSE);
580 ahc_unlock(ahc, &flags);
586 ahc_linux_target_destroy(struct scsi_target *starget)
588 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget);
594 ahc_linux_slave_alloc(struct scsi_device *sdev)
596 struct ahc_softc *ahc =
597 *((struct ahc_softc **)sdev->host->hostdata);
598 struct scsi_target *starget = sdev->sdev_target;
599 struct ahc_linux_target *targ = scsi_transport_target_data(starget);
600 struct ahc_linux_device *dev;
603 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id);
605 BUG_ON(targ->sdev[sdev->lun] != NULL);
607 dev = scsi_transport_device_data(sdev);
608 memset(dev, 0, sizeof(*dev));
611 * We start out life using untagged
612 * transactions of which we allow one.
617 * Set maxtags to 0. This will be changed if we
618 * later determine that we are dealing with
619 * a tagged queuing capable device.
623 targ->sdev[sdev->lun] = sdev;
625 spi_period(starget) = 0;
631 ahc_linux_slave_configure(struct scsi_device *sdev)
633 struct ahc_softc *ahc;
635 ahc = *((struct ahc_softc **)sdev->host->hostdata);
638 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
640 ahc_linux_device_queue_depth(sdev);
642 /* Initial Domain Validation */
643 if (!spi_initial_dv(sdev->sdev_target))
650 ahc_linux_slave_destroy(struct scsi_device *sdev)
652 struct ahc_softc *ahc;
653 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
654 struct ahc_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
656 ahc = *((struct ahc_softc **)sdev->host->hostdata);
658 printf("%s: Slave Destroy %d\n", ahc_name(ahc), sdev->id);
662 targ->sdev[sdev->lun] = NULL;
665 #if defined(__i386__)
667 * Return the disk geometry for the given SCSI device.
670 ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
671 sector_t capacity, int geom[])
679 struct ahc_softc *ahc;
682 ahc = *((struct ahc_softc **)sdev->host->hostdata);
683 channel = sdev_channel(sdev);
685 bh = scsi_bios_ptable(bdev);
687 ret = scsi_partsize(bh, capacity,
688 &geom[2], &geom[0], &geom[1]);
695 cylinders = aic_sector_div(capacity, heads, sectors);
697 if (aic7xxx_extended != 0)
699 else if (channel == 0)
700 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0;
702 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0;
703 if (extended && cylinders >= 1024) {
706 cylinders = aic_sector_div(capacity, heads, sectors);
716 * Abort the current SCSI command(s).
719 ahc_linux_abort(struct scsi_cmnd *cmd)
723 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT);
725 printf("aic7xxx_abort returns 0x%x\n", error);
730 * Attempt to send a target reset message to the device that timed out.
733 ahc_linux_dev_reset(struct scsi_cmnd *cmd)
737 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET);
739 printf("aic7xxx_dev_reset returns 0x%x\n", error);
744 * Reset the SCSI bus.
747 ahc_linux_bus_reset(struct scsi_cmnd *cmd)
749 struct ahc_softc *ahc;
753 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
755 ahc_lock(ahc, &flags);
756 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A',
757 /*initiate reset*/TRUE);
758 ahc_unlock(ahc, &flags);
761 printf("%s: SCSI bus reset delivered. "
762 "%d SCBs aborted.\n", ahc_name(ahc), found);
767 struct scsi_host_template aic7xxx_driver_template = {
768 .module = THIS_MODULE,
770 .proc_name = "aic7xxx",
771 .proc_info = ahc_linux_proc_info,
772 .info = ahc_linux_info,
773 .queuecommand = ahc_linux_queue,
774 .eh_abort_handler = ahc_linux_abort,
775 .eh_device_reset_handler = ahc_linux_dev_reset,
776 .eh_bus_reset_handler = ahc_linux_bus_reset,
777 #if defined(__i386__)
778 .bios_param = ahc_linux_biosparam,
780 .can_queue = AHC_MAX_QUEUE,
783 .use_clustering = ENABLE_CLUSTERING,
784 .slave_alloc = ahc_linux_slave_alloc,
785 .slave_configure = ahc_linux_slave_configure,
786 .slave_destroy = ahc_linux_slave_destroy,
787 .target_alloc = ahc_linux_target_alloc,
788 .target_destroy = ahc_linux_target_destroy,
791 /**************************** Tasklet Handler *********************************/
793 /******************************** Macros **************************************/
794 #define BUILD_SCSIID(ahc, cmd) \
795 ((((cmd)->device->id << TID_SHIFT) & TID) \
796 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
797 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
799 /******************************** Bus DMA *************************************/
801 ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent,
802 bus_size_t alignment, bus_size_t boundary,
803 dma_addr_t lowaddr, dma_addr_t highaddr,
804 bus_dma_filter_t *filter, void *filterarg,
805 bus_size_t maxsize, int nsegments,
806 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
810 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
815 * Linux is very simplistic about DMA memory. For now don't
816 * maintain all specification information. Once Linux supplies
817 * better facilities for doing these operations, or the
818 * needs of this particular driver change, we might need to do
821 dmat->alignment = alignment;
822 dmat->boundary = boundary;
823 dmat->maxsize = maxsize;
829 ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat)
831 free(dmat, M_DEVBUF);
835 ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr,
836 int flags, bus_dmamap_t *mapp)
838 *vaddr = pci_alloc_consistent(ahc->dev_softc,
839 dmat->maxsize, mapp);
846 ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat,
847 void* vaddr, bus_dmamap_t map)
849 pci_free_consistent(ahc->dev_softc, dmat->maxsize,
854 ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map,
855 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
856 void *cb_arg, int flags)
859 * Assume for now that this will only be used during
860 * initialization and not for per-transaction buffer mapping.
862 bus_dma_segment_t stack_sg;
864 stack_sg.ds_addr = map;
865 stack_sg.ds_len = dmat->maxsize;
866 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
871 ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
876 ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map)
883 ahc_linux_setup_tag_info_global(char *p)
887 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
888 printf("Setting Global Tags= %d\n", tags);
890 for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) {
891 for (j = 0; j < AHC_NUM_TARGETS; j++) {
892 aic7xxx_tag_info[i].tag_commands[j] = tags;
898 ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
901 if ((instance >= 0) && (targ >= 0)
902 && (instance < NUM_ELEMENTS(aic7xxx_tag_info))
903 && (targ < AHC_NUM_TARGETS)) {
904 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff;
906 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
911 ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
912 void (*callback)(u_long, int, int, int32_t),
921 char tok_list[] = {'.', ',', '{', '}', '\0'};
923 /* All options use a ':' name/arg separator */
931 * Restore separator that may be in
932 * the middle of our option argument.
934 tok_end = strchr(opt_arg, '\0');
940 if (instance == -1) {
947 printf("Malformed Option %s\n",
957 else if (instance != -1)
967 else if (instance >= 0)
976 for (i = 0; tok_list[i]; i++) {
977 tok_end2 = strchr(opt_arg, tok_list[i]);
978 if ((tok_end2) && (tok_end2 < tok_end))
981 callback(callback_arg, instance, targ,
982 simple_strtol(opt_arg, NULL, 0));
991 * Handle Linux boot parameters. This routine allows for assigning a value
992 * to a parameter with a ':' between the parameter and the value.
993 * ie. aic7xxx=stpwlev:1,extended
996 aic7xxx_setup(char *s)
1006 { "extended", &aic7xxx_extended },
1007 { "no_reset", &aic7xxx_no_reset },
1008 { "verbose", &aic7xxx_verbose },
1009 { "allow_memio", &aic7xxx_allow_memio},
1011 { "debug", &ahc_debug },
1013 { "periodic_otag", &aic7xxx_periodic_otag },
1014 { "pci_parity", &aic7xxx_pci_parity },
1015 { "seltime", &aic7xxx_seltime },
1016 { "tag_info", NULL },
1017 { "global_tag_depth", NULL },
1021 end = strchr(s, '\0');
1024 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1025 * will never be 0 in this case.
1029 while ((p = strsep(&s, ",.")) != NULL) {
1032 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1034 n = strlen(options[i].name);
1035 if (strncmp(options[i].name, p, n) == 0)
1038 if (i == NUM_ELEMENTS(options))
1041 if (strncmp(p, "global_tag_depth", n) == 0) {
1042 ahc_linux_setup_tag_info_global(p + n);
1043 } else if (strncmp(p, "tag_info", n) == 0) {
1044 s = ahc_parse_brace_option("tag_info", p + n, end,
1045 2, ahc_linux_setup_tag_info, 0);
1046 } else if (p[n] == ':') {
1047 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1048 } else if (strncmp(p, "verbose", n) == 0) {
1049 *(options[i].flag) = 1;
1051 *(options[i].flag) ^= 0xFFFFFFFF;
1057 __setup("aic7xxx=", aic7xxx_setup);
1059 uint32_t aic7xxx_verbose;
1062 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
1065 struct Scsi_Host *host;
1070 template->name = ahc->description;
1071 host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
1075 *((struct ahc_softc **)host->hostdata) = ahc;
1077 ahc->platform_data->host = host;
1078 host->can_queue = AHC_MAX_QUEUE;
1079 host->cmd_per_lun = 2;
1080 /* XXX No way to communicate the ID for multiple channels */
1081 host->this_id = ahc->our_id;
1082 host->irq = ahc->platform_data->irq;
1083 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8;
1084 host->max_lun = AHC_NUM_LUNS;
1085 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0;
1086 host->sg_tablesize = AHC_NSEG;
1087 ahc_set_unit(ahc, ahc_linux_unit++);
1088 sprintf(buf, "scsi%d", host->host_no);
1089 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1090 if (new_name != NULL) {
1091 strcpy(new_name, buf);
1092 ahc_set_name(ahc, new_name);
1094 host->unique_id = ahc->unit;
1095 ahc_linux_initialize_scsi_bus(ahc);
1096 ahc_intr_enable(ahc, TRUE);
1097 ahc_unlock(ahc, &s);
1099 host->transportt = ahc_linux_transport_template;
1101 retval = scsi_add_host(host,
1102 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
1104 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
1105 scsi_host_put(host);
1109 scsi_scan_host(host);
1114 * Place the SCSI bus into a known state by either resetting it,
1115 * or forcing transfer negotiations on the next command to any
1119 ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc)
1127 if (aic7xxx_no_reset != 0)
1128 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B);
1130 if ((ahc->flags & AHC_RESET_BUS_A) != 0)
1131 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE);
1133 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8;
1135 if ((ahc->features & AHC_TWIN) != 0) {
1137 if ((ahc->flags & AHC_RESET_BUS_B) != 0) {
1138 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE);
1147 * Force negotiation to async for all targets that
1148 * will not see an initial bus reset.
1150 for (; i < numtarg; i++) {
1151 struct ahc_devinfo devinfo;
1152 struct ahc_initiator_tinfo *tinfo;
1153 struct ahc_tmode_tstate *tstate;
1159 our_id = ahc->our_id;
1161 if (i > 7 && (ahc->features & AHC_TWIN) != 0) {
1163 our_id = ahc->our_id_b;
1166 tinfo = ahc_fetch_transinfo(ahc, channel, our_id,
1167 target_id, &tstate);
1168 ahc_compile_devinfo(&devinfo, our_id, target_id,
1169 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR);
1170 ahc_update_neg_request(ahc, &devinfo, tstate,
1171 tinfo, AHC_NEG_ALWAYS);
1173 /* Give the bus some time to recover */
1174 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) {
1175 ahc_linux_freeze_simq(ahc);
1176 init_timer(&ahc->platform_data->reset_timer);
1177 ahc->platform_data->reset_timer.data = (u_long)ahc;
1178 ahc->platform_data->reset_timer.expires =
1179 jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000;
1180 ahc->platform_data->reset_timer.function =
1181 ahc_linux_release_simq;
1182 add_timer(&ahc->platform_data->reset_timer);
1187 ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg)
1190 ahc->platform_data =
1191 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT);
1192 if (ahc->platform_data == NULL)
1194 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data));
1195 ahc->platform_data->irq = AHC_LINUX_NOIRQ;
1197 init_MUTEX_LOCKED(&ahc->platform_data->eh_sem);
1198 ahc->seltime = (aic7xxx_seltime & 0x3) << 4;
1199 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4;
1200 if (aic7xxx_pci_parity == 0)
1201 ahc->flags |= AHC_DISABLE_PCI_PERR;
1207 ahc_platform_free(struct ahc_softc *ahc)
1209 struct scsi_target *starget;
1212 if (ahc->platform_data != NULL) {
1213 /* destroy all of the device and target objects */
1214 for (i = 0; i < AHC_NUM_TARGETS; i++) {
1215 starget = ahc->platform_data->starget[i];
1216 if (starget != NULL) {
1217 for (j = 0; j < AHC_NUM_LUNS; j++) {
1218 struct ahc_linux_target *targ =
1219 scsi_transport_target_data(starget);
1221 if (targ->sdev[j] == NULL)
1223 targ->sdev[j] = NULL;
1225 ahc->platform_data->starget[i] = NULL;
1229 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ)
1230 free_irq(ahc->platform_data->irq, ahc);
1231 if (ahc->tag == BUS_SPACE_PIO
1232 && ahc->bsh.ioport != 0)
1233 release_region(ahc->bsh.ioport, 256);
1234 if (ahc->tag == BUS_SPACE_MEMIO
1235 && ahc->bsh.maddr != NULL) {
1236 iounmap(ahc->bsh.maddr);
1237 release_mem_region(ahc->platform_data->mem_busaddr,
1241 if (ahc->platform_data->host)
1242 scsi_host_put(ahc->platform_data->host);
1244 free(ahc->platform_data, M_DEVBUF);
1249 ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb)
1251 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb),
1252 SCB_GET_CHANNEL(ahc, scb),
1253 SCB_GET_LUN(scb), SCB_LIST_NULL,
1254 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1258 ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo,
1261 struct scsi_target *starget;
1262 struct ahc_linux_target *targ;
1263 struct ahc_linux_device *dev;
1264 struct scsi_device *sdev;
1265 u_int target_offset;
1269 target_offset = devinfo->target;
1270 if (devinfo->channel != 'A')
1272 starget = ahc->platform_data->starget[target_offset];
1273 targ = scsi_transport_target_data(starget);
1274 BUG_ON(targ == NULL);
1275 sdev = targ->sdev[devinfo->lun];
1278 dev = scsi_transport_device_data(sdev);
1280 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED);
1283 case AHC_QUEUE_NONE:
1286 case AHC_QUEUE_BASIC:
1287 now_queuing = AHC_DEV_Q_BASIC;
1289 case AHC_QUEUE_TAGGED:
1290 now_queuing = AHC_DEV_Q_TAGGED;
1293 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0
1294 && (was_queuing != now_queuing)
1295 && (dev->active != 0)) {
1296 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY;
1300 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG);
1304 usertags = ahc_linux_user_tagdepth(ahc, devinfo);
1307 * Start out agressively and allow our
1308 * dynamic queue depth algorithm to take
1311 dev->maxtags = usertags;
1312 dev->openings = dev->maxtags - dev->active;
1314 if (dev->maxtags == 0) {
1316 * Queueing is disabled by the user.
1319 } else if (alg == AHC_QUEUE_TAGGED) {
1320 dev->flags |= AHC_DEV_Q_TAGGED;
1321 if (aic7xxx_periodic_otag != 0)
1322 dev->flags |= AHC_DEV_PERIODIC_OTAG;
1324 dev->flags |= AHC_DEV_Q_BASIC;
1326 /* We can only have one opening. */
1328 dev->openings = 1 - dev->active;
1330 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) {
1331 case AHC_DEV_Q_BASIC:
1332 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG);
1333 scsi_activate_tcq(sdev, dev->openings + dev->active);
1335 case AHC_DEV_Q_TAGGED:
1336 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
1337 scsi_activate_tcq(sdev, dev->openings + dev->active);
1341 * We allow the OS to queue 2 untagged transactions to
1342 * us at any time even though we can only execute them
1343 * serially on the controller/device. This should
1344 * remove some latency.
1346 scsi_deactivate_tcq(sdev, 2);
1352 ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel,
1353 int lun, u_int tag, role_t role, uint32_t status)
1359 ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
1361 static int warned_user;
1365 if ((ahc->user_discenable & devinfo->target_mask) != 0) {
1366 if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) {
1367 if (warned_user == 0) {
1370 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1371 "aic7xxx: for installed controllers. Using defaults\n"
1372 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1373 "aic7xxx: the aic7xxx_osm..c source file.\n");
1376 tags = AHC_MAX_QUEUE;
1378 adapter_tag_info_t *tag_info;
1380 tag_info = &aic7xxx_tag_info[ahc->unit];
1381 tags = tag_info->tag_commands[devinfo->target_offset];
1382 if (tags > AHC_MAX_QUEUE)
1383 tags = AHC_MAX_QUEUE;
1390 * Determines the queue depth for a given device.
1393 ahc_linux_device_queue_depth(struct scsi_device *sdev)
1395 struct ahc_devinfo devinfo;
1397 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata);
1399 ahc_compile_devinfo(&devinfo,
1400 sdev->sdev_target->channel == 0
1401 ? ahc->our_id : ahc->our_id_b,
1402 sdev->sdev_target->id, sdev->lun,
1403 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1405 tags = ahc_linux_user_tagdepth(ahc, &devinfo);
1406 if (tags != 0 && sdev->tagged_supported != 0) {
1408 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED);
1409 ahc_print_devinfo(ahc, &devinfo);
1410 printf("Tagged Queuing enabled. Depth %d\n", tags);
1412 ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE);
1417 ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev,
1418 struct scsi_cmnd *cmd)
1421 struct hardware_scb *hscb;
1422 struct ahc_initiator_tinfo *tinfo;
1423 struct ahc_tmode_tstate *tstate;
1425 struct scb_tailq *untagged_q = NULL;
1428 * Schedule us to run later. The only reason we are not
1429 * running is because the whole controller Q is frozen.
1431 if (ahc->platform_data->qfrozen != 0)
1432 return SCSI_MLQUEUE_HOST_BUSY;
1435 * We only allow one untagged transaction
1436 * per target in the initiator role unless
1437 * we are storing a full busy target *lun*
1438 * table in SCB space.
1440 if (!blk_rq_tagged(cmd->request)
1441 && (ahc->features & AHC_SCB_BTT) == 0) {
1444 target_offset = cmd->device->id + cmd->device->channel * 8;
1445 untagged_q = &(ahc->untagged_queues[target_offset]);
1446 if (!TAILQ_EMPTY(untagged_q))
1447 /* if we're already executing an untagged command
1448 * we're busy to another */
1449 return SCSI_MLQUEUE_DEVICE_BUSY;
1453 * Get an scb to use.
1455 scb = ahc_get_scb(ahc);
1457 return SCSI_MLQUEUE_HOST_BUSY;
1460 scb->platform_data->dev = dev;
1462 cmd->host_scribble = (char *)scb;
1465 * Fill out basics of the HSCB.
1468 hscb->scsiid = BUILD_SCSIID(ahc, cmd);
1469 hscb->lun = cmd->device->lun;
1470 mask = SCB_GET_TARGET_MASK(ahc, scb);
1471 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb),
1472 SCB_GET_OUR_ID(scb),
1473 SCB_GET_TARGET(ahc, scb), &tstate);
1474 hscb->scsirate = tinfo->scsirate;
1475 hscb->scsioffset = tinfo->curr.offset;
1476 if ((tstate->ultraenb & mask) != 0)
1477 hscb->control |= ULTRAENB;
1479 if ((ahc->user_discenable & mask) != 0)
1480 hscb->control |= DISCENB;
1482 if ((tstate->auto_negotiate & mask) != 0) {
1483 scb->flags |= SCB_AUTO_NEGOTIATE;
1484 scb->hscb->control |= MK_MESSAGE;
1487 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) {
1489 uint8_t tag_msgs[2];
1491 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1492 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1493 hscb->control |= tag_msgs[0];
1494 if (tag_msgs[0] == MSG_ORDERED_TASK)
1495 dev->commands_since_idle_or_otag = 0;
1496 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH
1497 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) {
1498 hscb->control |= MSG_ORDERED_TASK;
1499 dev->commands_since_idle_or_otag = 0;
1501 hscb->control |= MSG_SIMPLE_TASK;
1505 hscb->cdb_len = cmd->cmd_len;
1506 if (hscb->cdb_len <= 12) {
1507 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len);
1509 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len);
1510 scb->flags |= SCB_CDB32_PTR;
1513 scb->platform_data->xfer_len = 0;
1514 ahc_set_residual(scb, 0);
1515 ahc_set_sense_residual(scb, 0);
1517 if (cmd->use_sg != 0) {
1518 struct ahc_dma_seg *sg;
1519 struct scatterlist *cur_seg;
1520 struct scatterlist *end_seg;
1523 cur_seg = (struct scatterlist *)cmd->request_buffer;
1524 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg,
1525 cmd->sc_data_direction);
1526 end_seg = cur_seg + nseg;
1527 /* Copy the segments into the SG list. */
1530 * The sg_count may be larger than nseg if
1531 * a transfer crosses a 32bit page.
1533 while (cur_seg < end_seg) {
1538 addr = sg_dma_address(cur_seg);
1539 len = sg_dma_len(cur_seg);
1540 consumed = ahc_linux_map_seg(ahc, scb,
1543 scb->sg_count += consumed;
1547 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1550 * Reset the sg list pointer.
1553 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1556 * Copy the first SG into the "current"
1557 * data pointer area.
1559 scb->hscb->dataptr = scb->sg_list->addr;
1560 scb->hscb->datacnt = scb->sg_list->len;
1561 } else if (cmd->request_bufflen != 0) {
1562 struct ahc_dma_seg *sg;
1566 addr = pci_map_single(ahc->dev_softc,
1567 cmd->request_buffer,
1568 cmd->request_bufflen,
1569 cmd->sc_data_direction);
1570 scb->platform_data->buf_busaddr = addr;
1571 scb->sg_count = ahc_linux_map_seg(ahc, scb,
1573 cmd->request_bufflen);
1574 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG);
1577 * Reset the sg list pointer.
1580 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID);
1583 * Copy the first SG into the "current"
1584 * data pointer area.
1586 scb->hscb->dataptr = sg->addr;
1587 scb->hscb->datacnt = sg->len;
1589 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL);
1590 scb->hscb->dataptr = 0;
1591 scb->hscb->datacnt = 0;
1595 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links);
1598 dev->commands_issued++;
1599 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0)
1600 dev->commands_since_idle_or_otag++;
1602 scb->flags |= SCB_ACTIVE;
1604 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe);
1605 scb->flags |= SCB_UNTAGGEDQ;
1607 ahc_queue_scb(ahc, scb);
1612 * SCSI controller interrupt handler.
1615 ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1617 struct ahc_softc *ahc;
1621 ahc = (struct ahc_softc *) dev_id;
1622 ahc_lock(ahc, &flags);
1623 ours = ahc_intr(ahc);
1624 ahc_unlock(ahc, &flags);
1625 return IRQ_RETVAL(ours);
1629 ahc_platform_flushwork(struct ahc_softc *ahc)
1635 ahc_send_async(struct ahc_softc *ahc, char channel,
1636 u_int target, u_int lun, ac_code code, void *arg)
1639 case AC_TRANSFER_NEG:
1642 struct scsi_target *starget;
1643 struct ahc_linux_target *targ;
1644 struct info_str info;
1645 struct ahc_initiator_tinfo *tinfo;
1646 struct ahc_tmode_tstate *tstate;
1648 unsigned int target_ppr_options;
1650 BUG_ON(target == CAM_TARGET_WILDCARD);
1653 info.length = sizeof(buf);
1656 tinfo = ahc_fetch_transinfo(ahc, channel,
1657 channel == 'A' ? ahc->our_id
1662 * Don't bother reporting results while
1663 * negotiations are still pending.
1665 if (tinfo->curr.period != tinfo->goal.period
1666 || tinfo->curr.width != tinfo->goal.width
1667 || tinfo->curr.offset != tinfo->goal.offset
1668 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1669 if (bootverbose == 0)
1673 * Don't bother reporting results that
1674 * are identical to those last reported.
1676 target_offset = target;
1679 starget = ahc->platform_data->starget[target_offset];
1680 if (starget == NULL)
1682 targ = scsi_transport_target_data(starget);
1684 target_ppr_options =
1685 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1686 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1687 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0);
1689 if (tinfo->curr.period == spi_period(starget)
1690 && tinfo->curr.width == spi_width(starget)
1691 && tinfo->curr.offset == spi_offset(starget)
1692 && tinfo->curr.ppr_options == target_ppr_options)
1693 if (bootverbose == 0)
1696 spi_period(starget) = tinfo->curr.period;
1697 spi_width(starget) = tinfo->curr.width;
1698 spi_offset(starget) = tinfo->curr.offset;
1699 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1700 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1701 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1702 spi_display_xfer_agreement(starget);
1707 WARN_ON(lun != CAM_LUN_WILDCARD);
1708 scsi_report_device_reset(ahc->platform_data->host,
1709 channel - 'A', target);
1713 if (ahc->platform_data->host != NULL) {
1714 scsi_report_bus_reset(ahc->platform_data->host,
1719 panic("ahc_send_async: Unexpected async event");
1724 * Calls the higher level scsi done function and frees the scb.
1727 ahc_done(struct ahc_softc *ahc, struct scb *scb)
1729 struct scsi_cmnd *cmd;
1730 struct ahc_linux_device *dev;
1732 LIST_REMOVE(scb, pending_links);
1733 if ((scb->flags & SCB_UNTAGGEDQ) != 0) {
1734 struct scb_tailq *untagged_q;
1737 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb);
1738 untagged_q = &(ahc->untagged_queues[target_offset]);
1739 TAILQ_REMOVE(untagged_q, scb, links.tqe);
1740 BUG_ON(!TAILQ_EMPTY(untagged_q));
1743 if ((scb->flags & SCB_ACTIVE) == 0) {
1744 printf("SCB %d done'd twice\n", scb->hscb->tag);
1745 ahc_dump_card_state(ahc);
1746 panic("Stopping for safety");
1749 dev = scb->platform_data->dev;
1752 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1753 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1756 ahc_linux_unmap_scb(ahc, scb);
1759 * Guard against stale sense data.
1760 * The Linux mid-layer assumes that sense
1761 * was retrieved anytime the first byte of
1762 * the sense buffer looks "sane".
1764 cmd->sense_buffer[0] = 0;
1765 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) {
1766 uint32_t amount_xferred;
1769 ahc_get_transfer_length(scb) - ahc_get_residual(scb);
1770 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1772 if ((ahc_debug & AHC_SHOW_MISC) != 0) {
1773 ahc_print_path(ahc, scb);
1774 printf("Set CAM_UNCOR_PARITY\n");
1777 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY);
1778 #ifdef AHC_REPORT_UNDERFLOWS
1780 * This code is disabled by default as some
1781 * clients of the SCSI system do not properly
1782 * initialize the underflow parameter. This
1783 * results in spurious termination of commands
1784 * that complete as expected (e.g. underflow is
1785 * allowed as command can return variable amounts
1788 } else if (amount_xferred < scb->io_ctx->underflow) {
1791 ahc_print_path(ahc, scb);
1793 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1794 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1796 ahc_print_path(ahc, scb);
1797 printf("Saw underflow (%ld of %ld bytes). "
1798 "Treated as error\n",
1799 ahc_get_residual(scb),
1800 ahc_get_transfer_length(scb));
1801 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1804 ahc_set_transaction_status(scb, CAM_REQ_CMP);
1806 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1807 ahc_linux_handle_scsi_status(ahc, cmd->device, scb);
1810 if (dev->openings == 1
1811 && ahc_get_transaction_status(scb) == CAM_REQ_CMP
1812 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1813 dev->tag_success_count++;
1815 * Some devices deal with temporary internal resource
1816 * shortages by returning queue full. When the queue
1817 * full occurrs, we throttle back. Slowly try to get
1818 * back to our previous queue depth.
1820 if ((dev->openings + dev->active) < dev->maxtags
1821 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) {
1822 dev->tag_success_count = 0;
1826 if (dev->active == 0)
1827 dev->commands_since_idle_or_otag = 0;
1829 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1830 printf("Recovery SCB completes\n");
1831 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT
1832 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED)
1833 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1834 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
1835 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
1836 up(&ahc->platform_data->eh_sem);
1840 ahc_free_scb(ahc, scb);
1841 ahc_linux_queue_cmd_complete(ahc, cmd);
1845 ahc_linux_handle_scsi_status(struct ahc_softc *ahc,
1846 struct scsi_device *sdev, struct scb *scb)
1848 struct ahc_devinfo devinfo;
1849 struct ahc_linux_device *dev = scsi_transport_device_data(sdev);
1851 ahc_compile_devinfo(&devinfo,
1853 sdev->sdev_target->id, sdev->lun,
1854 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1858 * We don't currently trust the mid-layer to
1859 * properly deal with queue full or busy. So,
1860 * when one occurs, we tell the mid-layer to
1861 * unconditionally requeue the command to us
1862 * so that we can retry it ourselves. We also
1863 * implement our own throttling mechanism so
1864 * we don't clobber the device with too many
1867 switch (ahc_get_scsi_status(scb)) {
1870 case SCSI_STATUS_CHECK_COND:
1871 case SCSI_STATUS_CMD_TERMINATED:
1873 struct scsi_cmnd *cmd;
1876 * Copy sense information to the OS's cmd
1877 * structure if it is available.
1880 if (scb->flags & SCB_SENSE) {
1883 sense_size = MIN(sizeof(struct scsi_sense_data)
1884 - ahc_get_sense_residual(scb),
1885 sizeof(cmd->sense_buffer));
1886 memcpy(cmd->sense_buffer,
1887 ahc_get_sense_buf(ahc, scb), sense_size);
1888 if (sense_size < sizeof(cmd->sense_buffer))
1889 memset(&cmd->sense_buffer[sense_size], 0,
1890 sizeof(cmd->sense_buffer) - sense_size);
1891 cmd->result |= (DRIVER_SENSE << 24);
1893 if (ahc_debug & AHC_SHOW_SENSE) {
1896 printf("Copied %d bytes of sense data:",
1898 for (i = 0; i < sense_size; i++) {
1901 printf("0x%x ", cmd->sense_buffer[i]);
1909 case SCSI_STATUS_QUEUE_FULL:
1912 * By the time the core driver has returned this
1913 * command, all other commands that were queued
1914 * to us but not the device have been returned.
1915 * This ensures that dev->active is equal to
1916 * the number of commands actually queued to
1919 dev->tag_success_count = 0;
1920 if (dev->active != 0) {
1922 * Drop our opening count to the number
1923 * of commands currently outstanding.
1927 ahc_print_path(ahc, scb);
1928 printf("Dropping tag count to %d\n", dev->active);
1930 if (dev->active == dev->tags_on_last_queuefull) {
1932 dev->last_queuefull_same_count++;
1934 * If we repeatedly see a queue full
1935 * at the same queue depth, this
1936 * device has a fixed number of tag
1937 * slots. Lock in this tag depth
1938 * so we stop seeing queue fulls from
1941 if (dev->last_queuefull_same_count
1942 == AHC_LOCK_TAGS_COUNT) {
1943 dev->maxtags = dev->active;
1944 ahc_print_path(ahc, scb);
1945 printf("Locking max tag count at %d\n",
1949 dev->tags_on_last_queuefull = dev->active;
1950 dev->last_queuefull_same_count = 0;
1952 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ);
1953 ahc_set_scsi_status(scb, SCSI_STATUS_OK);
1954 ahc_platform_set_tags(ahc, &devinfo,
1955 (dev->flags & AHC_DEV_Q_BASIC)
1956 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1960 * Drop down to a single opening, and treat this
1961 * as if the target returned BUSY SCSI status.
1964 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY);
1965 ahc_platform_set_tags(ahc, &devinfo,
1966 (dev->flags & AHC_DEV_Q_BASIC)
1967 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED);
1974 ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd)
1977 * Map CAM error codes into Linux Error codes. We
1978 * avoid the conversion so that the DV code has the
1979 * full error information available when making
1980 * state change decisions.
1985 switch (ahc_cmd_get_transaction_status(cmd)) {
1986 case CAM_REQ_INPROG:
1988 case CAM_SCSI_STATUS_ERROR:
1989 new_status = DID_OK;
1991 case CAM_REQ_ABORTED:
1992 new_status = DID_ABORT;
1995 new_status = DID_BUS_BUSY;
1997 case CAM_REQ_INVALID:
1998 case CAM_PATH_INVALID:
1999 new_status = DID_BAD_TARGET;
2001 case CAM_SEL_TIMEOUT:
2002 new_status = DID_NO_CONNECT;
2004 case CAM_SCSI_BUS_RESET:
2006 new_status = DID_RESET;
2008 case CAM_UNCOR_PARITY:
2009 new_status = DID_PARITY;
2011 case CAM_CMD_TIMEOUT:
2012 new_status = DID_TIME_OUT;
2015 case CAM_REQ_CMP_ERR:
2016 case CAM_AUTOSENSE_FAIL:
2018 case CAM_DATA_RUN_ERR:
2019 case CAM_UNEXP_BUSFREE:
2020 case CAM_SEQUENCE_FAIL:
2021 case CAM_CCB_LEN_ERR:
2022 case CAM_PROVIDE_FAIL:
2023 case CAM_REQ_TERMIO:
2024 case CAM_UNREC_HBA_ERROR:
2025 case CAM_REQ_TOO_BIG:
2026 new_status = DID_ERROR;
2028 case CAM_REQUEUE_REQ:
2029 new_status = DID_REQUEUE;
2032 /* We should never get here */
2033 new_status = DID_ERROR;
2037 ahc_cmd_set_transaction_status(cmd, new_status);
2040 cmd->scsi_done(cmd);
2044 ahc_linux_sem_timeout(u_long arg)
2046 struct ahc_softc *ahc;
2049 ahc = (struct ahc_softc *)arg;
2052 if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) {
2053 ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE;
2054 up(&ahc->platform_data->eh_sem);
2056 ahc_unlock(ahc, &s);
2060 ahc_linux_freeze_simq(struct ahc_softc *ahc)
2062 ahc->platform_data->qfrozen++;
2063 if (ahc->platform_data->qfrozen == 1) {
2064 scsi_block_requests(ahc->platform_data->host);
2066 /* XXX What about Twin channels? */
2067 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS,
2068 CAM_LUN_WILDCARD, SCB_LIST_NULL,
2069 ROLE_INITIATOR, CAM_REQUEUE_REQ);
2074 ahc_linux_release_simq(u_long arg)
2076 struct ahc_softc *ahc;
2080 ahc = (struct ahc_softc *)arg;
2084 if (ahc->platform_data->qfrozen > 0)
2085 ahc->platform_data->qfrozen--;
2086 if (ahc->platform_data->qfrozen == 0)
2088 ahc_unlock(ahc, &s);
2090 * There is still a race here. The mid-layer
2091 * should keep its own freeze count and use
2092 * a bottom half handler to run the queues
2093 * so we can unblock with our own lock held.
2096 scsi_unblock_requests(ahc->platform_data->host);
2100 ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag)
2102 struct ahc_softc *ahc;
2103 struct ahc_linux_device *dev;
2104 struct scb *pending_scb;
2106 u_int active_scb_index;
2115 unsigned long flags;
2120 ahc = *(struct ahc_softc **)cmd->device->host->hostdata;
2122 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n",
2123 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET");
2126 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2127 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2130 ahc_lock(ahc, &flags);
2133 * First determine if we currently own this command.
2134 * Start by searching the device queue. If not found
2135 * there, check the pending_scb list. If not found
2136 * at all, and the system wanted us to just abort the
2137 * command, return success.
2139 dev = scsi_transport_device_data(cmd->device);
2143 * No target device for this command exists,
2144 * so we must not still own the command.
2146 printf("%s:%d:%d:%d: Is not an active device\n",
2147 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2153 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0
2154 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id,
2155 cmd->device->channel + 'A',
2157 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) {
2158 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2159 ahc_name(ahc), cmd->device->channel, cmd->device->id,
2166 * See if we can find a matching cmd in the pending list.
2168 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2169 if (pending_scb->io_ctx == cmd)
2173 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) {
2175 /* Any SCB for this device will do for a target reset */
2176 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) {
2177 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd),
2178 scmd_channel(cmd) + 'A',
2180 SCB_LIST_NULL, ROLE_INITIATOR))
2185 if (pending_scb == NULL) {
2186 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2190 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2192 * We can't queue two recovery actions using the same SCB
2199 * Ensure that the card doesn't do anything
2200 * behind our back and that we didn't "just" miss
2201 * an interrupt that would affect this cmd.
2203 was_paused = ahc_is_paused(ahc);
2204 ahc_pause_and_flushwork(ahc);
2207 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2208 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2212 printf("%s: At time of recovery, card was %spaused\n",
2213 ahc_name(ahc), was_paused ? "" : "not ");
2214 ahc_dump_card_state(ahc);
2216 disconnected = TRUE;
2217 if (flag == SCB_ABORT) {
2218 if (ahc_search_qinfifo(ahc, cmd->device->id,
2219 cmd->device->channel + 'A',
2221 pending_scb->hscb->tag,
2222 ROLE_INITIATOR, CAM_REQ_ABORTED,
2223 SEARCH_COMPLETE) > 0) {
2224 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2225 ahc_name(ahc), cmd->device->channel,
2226 cmd->device->id, cmd->device->lun);
2230 } else if (ahc_search_qinfifo(ahc, cmd->device->id,
2231 cmd->device->channel + 'A',
2232 cmd->device->lun, pending_scb->hscb->tag,
2233 ROLE_INITIATOR, /*status*/0,
2234 SEARCH_COUNT) > 0) {
2235 disconnected = FALSE;
2238 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2239 struct scb *bus_scb;
2241 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG));
2242 if (bus_scb == pending_scb)
2243 disconnected = FALSE;
2244 else if (flag != SCB_ABORT
2245 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid
2246 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb))
2247 disconnected = FALSE;
2251 * At this point, pending_scb is the scb associated with the
2252 * passed in command. That command is currently active on the
2253 * bus, is in the disconnected state, or we're hoping to find
2254 * a command for the same target active on the bus to abuse to
2255 * send a BDR. Queue the appropriate message based on which of
2256 * these states we are in.
2258 last_phase = ahc_inb(ahc, LASTPHASE);
2259 saved_scbptr = ahc_inb(ahc, SCBPTR);
2260 active_scb_index = ahc_inb(ahc, SCB_TAG);
2261 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID);
2262 if (last_phase != P_BUSFREE
2263 && (pending_scb->hscb->tag == active_scb_index
2264 || (flag == SCB_DEVICE_RESET
2265 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) {
2268 * We're active on the bus, so assert ATN
2269 * and hope that the target responds.
2271 pending_scb = ahc_lookup_scb(ahc, active_scb_index);
2272 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2273 ahc_outb(ahc, MSG_OUT, HOST_MSG);
2274 ahc_outb(ahc, SCSISIGO, last_phase|ATNO);
2275 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2277 } else if (disconnected) {
2280 * Actually re-queue this SCB in an attempt
2281 * to select the device before it reconnects.
2282 * In either case (selection or reselection),
2283 * we will now issue the approprate message
2284 * to the timed-out device.
2286 * Set the MK_MESSAGE control bit indicating
2287 * that we desire to send a message. We
2288 * also set the disconnected flag since
2289 * in the paging case there is no guarantee
2290 * that our SCB control byte matches the
2291 * version on the card. We don't want the
2292 * sequencer to abort the command thinking
2293 * an unsolicited reselection occurred.
2295 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2296 pending_scb->flags |= SCB_RECOVERY_SCB|flag;
2299 * Remove any cached copy of this SCB in the
2300 * disconnected list in preparation for the
2301 * queuing of our abort SCB. We use the
2302 * same element in the SCB, SCB_NEXT, for
2303 * both the qinfifo and the disconnected list.
2305 ahc_search_disc_list(ahc, cmd->device->id,
2306 cmd->device->channel + 'A',
2307 cmd->device->lun, pending_scb->hscb->tag,
2308 /*stop_on_first*/TRUE,
2310 /*save_state*/FALSE);
2313 * In the non-paging case, the sequencer will
2314 * never re-reference the in-core SCB.
2315 * To make sure we are notified during
2316 * reslection, set the MK_MESSAGE flag in
2317 * the card's copy of the SCB.
2319 if ((ahc->flags & AHC_PAGESCBS) == 0) {
2320 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag);
2321 ahc_outb(ahc, SCB_CONTROL,
2322 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE);
2326 * Clear out any entries in the QINFIFO first
2327 * so we are the next SCB for this target
2330 ahc_search_qinfifo(ahc, cmd->device->id,
2331 cmd->device->channel + 'A',
2332 cmd->device->lun, SCB_LIST_NULL,
2333 ROLE_INITIATOR, CAM_REQUEUE_REQ,
2335 ahc_qinfifo_requeue_tail(ahc, pending_scb);
2336 ahc_outb(ahc, SCBPTR, saved_scbptr);
2337 ahc_print_path(ahc, pending_scb);
2338 printf("Device is disconnected, re-queuing SCB\n");
2341 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2348 * Our assumption is that if we don't have the command, no
2349 * recovery action was required, so we return success. Again,
2350 * the semantics of the mid-layer recovery engine are not
2351 * well defined, so this may change in time.
2358 struct timer_list timer;
2361 ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE;
2362 ahc_unlock(ahc, &flags);
2365 timer.data = (u_long)ahc;
2366 timer.expires = jiffies + (5 * HZ);
2367 timer.function = ahc_linux_sem_timeout;
2369 printf("Recovery code sleeping\n");
2370 down(&ahc->platform_data->eh_sem);
2371 printf("Recovery code awake\n");
2372 ret = del_timer_sync(&timer);
2374 printf("Timer Expired\n");
2378 ahc_unlock(ahc, &flags);
2383 ahc_platform_dump_card_state(struct ahc_softc *ahc)
2387 static void ahc_linux_set_width(struct scsi_target *starget, int width)
2389 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2390 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2391 struct ahc_devinfo devinfo;
2392 unsigned long flags;
2394 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2395 starget->channel + 'A', ROLE_INITIATOR);
2396 ahc_lock(ahc, &flags);
2397 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE);
2398 ahc_unlock(ahc, &flags);
2401 static void ahc_linux_set_period(struct scsi_target *starget, int period)
2403 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2404 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2405 struct ahc_tmode_tstate *tstate;
2406 struct ahc_initiator_tinfo *tinfo
2407 = ahc_fetch_transinfo(ahc,
2408 starget->channel + 'A',
2409 shost->this_id, starget->id, &tstate);
2410 struct ahc_devinfo devinfo;
2411 unsigned int ppr_options = tinfo->goal.ppr_options;
2412 unsigned long flags;
2413 unsigned long offset = tinfo->goal.offset;
2414 struct ahc_syncrate *syncrate;
2417 offset = MAX_OFFSET;
2420 period = 9; /* 12.5ns is our minimum */
2422 ppr_options |= MSG_EXT_PPR_DT_REQ;
2424 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2425 starget->channel + 'A', ROLE_INITIATOR);
2427 /* all PPR requests apart from QAS require wide transfers */
2428 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2429 if (spi_width(starget) == 0)
2430 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2433 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2434 ahc_lock(ahc, &flags);
2435 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2436 ppr_options, AHC_TRANS_GOAL, FALSE);
2437 ahc_unlock(ahc, &flags);
2440 static void ahc_linux_set_offset(struct scsi_target *starget, int offset)
2442 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2443 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2444 struct ahc_tmode_tstate *tstate;
2445 struct ahc_initiator_tinfo *tinfo
2446 = ahc_fetch_transinfo(ahc,
2447 starget->channel + 'A',
2448 shost->this_id, starget->id, &tstate);
2449 struct ahc_devinfo devinfo;
2450 unsigned int ppr_options = 0;
2451 unsigned int period = 0;
2452 unsigned long flags;
2453 struct ahc_syncrate *syncrate = NULL;
2455 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2456 starget->channel + 'A', ROLE_INITIATOR);
2458 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2459 period = tinfo->goal.period;
2460 ppr_options = tinfo->goal.ppr_options;
2462 ahc_lock(ahc, &flags);
2463 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset,
2464 ppr_options, AHC_TRANS_GOAL, FALSE);
2465 ahc_unlock(ahc, &flags);
2468 static void ahc_linux_set_dt(struct scsi_target *starget, int dt)
2470 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2471 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2472 struct ahc_tmode_tstate *tstate;
2473 struct ahc_initiator_tinfo *tinfo
2474 = ahc_fetch_transinfo(ahc,
2475 starget->channel + 'A',
2476 shost->this_id, starget->id, &tstate);
2477 struct ahc_devinfo devinfo;
2478 unsigned int ppr_options = tinfo->goal.ppr_options
2479 & ~MSG_EXT_PPR_DT_REQ;
2480 unsigned int period = tinfo->goal.period;
2481 unsigned int width = tinfo->goal.width;
2482 unsigned long flags;
2483 struct ahc_syncrate *syncrate;
2486 ppr_options |= MSG_EXT_PPR_DT_REQ;
2488 ahc_linux_set_width(starget, 1);
2489 } else if (period == 9)
2490 period = 10; /* if resetting DT, period must be >= 25ns */
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);
2502 /* FIXME: This code claims to support IU and QAS. However, the actual
2503 * sequencer code and aic7xxx_core have no support for these parameters and
2504 * will get into a bad state if they're negotiated. Do not enable this
2505 * unless you know what you're doing */
2506 static void ahc_linux_set_qas(struct scsi_target *starget, int qas)
2508 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2509 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2510 struct ahc_tmode_tstate *tstate;
2511 struct ahc_initiator_tinfo *tinfo
2512 = ahc_fetch_transinfo(ahc,
2513 starget->channel + 'A',
2514 shost->this_id, starget->id, &tstate);
2515 struct ahc_devinfo devinfo;
2516 unsigned int ppr_options = tinfo->goal.ppr_options
2517 & ~MSG_EXT_PPR_QAS_REQ;
2518 unsigned int period = tinfo->goal.period;
2519 unsigned long flags;
2520 struct ahc_syncrate *syncrate;
2523 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2525 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2526 starget->channel + 'A', ROLE_INITIATOR);
2527 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2528 ahc_lock(ahc, &flags);
2529 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2530 ppr_options, AHC_TRANS_GOAL, FALSE);
2531 ahc_unlock(ahc, &flags);
2534 static void ahc_linux_set_iu(struct scsi_target *starget, int iu)
2536 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2537 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata);
2538 struct ahc_tmode_tstate *tstate;
2539 struct ahc_initiator_tinfo *tinfo
2540 = ahc_fetch_transinfo(ahc,
2541 starget->channel + 'A',
2542 shost->this_id, starget->id, &tstate);
2543 struct ahc_devinfo devinfo;
2544 unsigned int ppr_options = tinfo->goal.ppr_options
2545 & ~MSG_EXT_PPR_IU_REQ;
2546 unsigned int period = tinfo->goal.period;
2547 unsigned long flags;
2548 struct ahc_syncrate *syncrate;
2551 ppr_options |= MSG_EXT_PPR_IU_REQ;
2553 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2554 starget->channel + 'A', ROLE_INITIATOR);
2555 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT);
2556 ahc_lock(ahc, &flags);
2557 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset,
2558 ppr_options, AHC_TRANS_GOAL, FALSE);
2559 ahc_unlock(ahc, &flags);
2563 static struct spi_function_template ahc_linux_transport_functions = {
2564 .set_offset = ahc_linux_set_offset,
2566 .set_period = ahc_linux_set_period,
2568 .set_width = ahc_linux_set_width,
2570 .set_dt = ahc_linux_set_dt,
2573 .set_iu = ahc_linux_set_iu,
2575 .set_qas = ahc_linux_set_qas,
2583 ahc_linux_init(void)
2586 * If we've been passed any parameters, process them now.
2589 aic7xxx_setup(aic7xxx);
2591 ahc_linux_transport_template =
2592 spi_attach_transport(&ahc_linux_transport_functions);
2593 if (!ahc_linux_transport_template)
2596 scsi_transport_reserve_target(ahc_linux_transport_template,
2597 sizeof(struct ahc_linux_target));
2598 scsi_transport_reserve_device(ahc_linux_transport_template,
2599 sizeof(struct ahc_linux_device));
2601 ahc_linux_pci_init();
2602 ahc_linux_eisa_init();
2607 ahc_linux_exit(void)
2609 ahc_linux_pci_exit();
2610 ahc_linux_eisa_exit();
2611 spi_release_transport(ahc_linux_transport_template);
2614 module_init(ahc_linux_init);
2615 module_exit(ahc_linux_exit);