2 * Adaptec AIC79xx device driver for Linux.
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
6 * --------------------------------------------------------------------------
7 * Copyright (c) 1994-2000 Justin T. Gibbs.
8 * Copyright (c) 1997-1999 Doug Ledford
9 * Copyright (c) 2000-2003 Adaptec Inc.
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
45 #include "aic79xx_osm.h"
46 #include "aic79xx_inline.h"
47 #include <scsi/scsicam.h>
49 static struct scsi_transport_template *ahd_linux_transport_template = NULL;
51 #include <linux/init.h> /* __setup */
52 #include <linux/mm.h> /* For fetching system memory size */
53 #include <linux/blkdev.h> /* For block_size() */
54 #include <linux/delay.h> /* For ssleep/msleep */
55 #include <linux/device.h>
56 #include <linux/slab.h>
59 * Bucket size for counting good commands in between bad ones.
61 #define AHD_LINUX_ERR_THRESH 1000
64 * Set this to the delay in seconds after SCSI bus reset.
65 * Note, we honor this only for the initial bus reset.
66 * The scsi error recovery code performs its own bus settle
67 * delay handling for error recovery actions.
69 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
70 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
72 #define AIC79XX_RESET_DELAY 5000
76 * To change the default number of tagged transactions allowed per-device,
77 * add a line to the lilo.conf file like:
78 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
79 * which will result in the first four devices on the first two
80 * controllers being set to a tagged queue depth of 32.
82 * The tag_commands is an array of 16 to allow for wide and twin adapters.
83 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
87 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
91 * Modify this as you see fit for your system.
93 * 0 tagged queuing disabled
94 * 1 <= n <= 253 n == max tags ever dispatched.
96 * The driver will throttle the number of commands dispatched to a
97 * device if it returns queue full. For devices with a fixed maximum
98 * queue depth, the driver will eventually determine this depth and
99 * lock it in (a console message is printed to indicate that a lock
100 * has occurred). On some devices, queue full is returned for a temporary
101 * resource shortage. These devices will return queue full at varying
102 * depths. The driver will throttle back when the queue fulls occur and
103 * attempt to slowly increase the depth over time as the device recovers
104 * from the resource shortage.
106 * In this example, the first line will disable tagged queueing for all
107 * the devices on the first probed aic79xx adapter.
109 * The second line enables tagged queueing with 4 commands/LUN for IDs
110 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
111 * driver to attempt to use up to 64 tags for ID 1.
113 * The third line is the same as the first line.
115 * The fourth line disables tagged queueing for devices 0 and 3. It
116 * enables tagged queueing for the other IDs, with 16 commands/LUN
117 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
118 * IDs 2, 5-7, and 9-15.
122 * NOTE: The below structure is for reference only, the actual structure
123 * to modify in order to change things is just below this comment block.
124 adapter_tag_info_t aic79xx_tag_info[] =
126 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
127 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
128 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
129 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
133 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
134 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
136 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
139 #define AIC79XX_CONFIGED_TAG_COMMANDS { \
140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
147 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
151 * By default, use the number of commands specified by
152 * the users kernel configuration.
154 static adapter_tag_info_t aic79xx_tag_info[] =
156 {AIC79XX_CONFIGED_TAG_COMMANDS},
157 {AIC79XX_CONFIGED_TAG_COMMANDS},
158 {AIC79XX_CONFIGED_TAG_COMMANDS},
159 {AIC79XX_CONFIGED_TAG_COMMANDS},
160 {AIC79XX_CONFIGED_TAG_COMMANDS},
161 {AIC79XX_CONFIGED_TAG_COMMANDS},
162 {AIC79XX_CONFIGED_TAG_COMMANDS},
163 {AIC79XX_CONFIGED_TAG_COMMANDS},
164 {AIC79XX_CONFIGED_TAG_COMMANDS},
165 {AIC79XX_CONFIGED_TAG_COMMANDS},
166 {AIC79XX_CONFIGED_TAG_COMMANDS},
167 {AIC79XX_CONFIGED_TAG_COMMANDS},
168 {AIC79XX_CONFIGED_TAG_COMMANDS},
169 {AIC79XX_CONFIGED_TAG_COMMANDS},
170 {AIC79XX_CONFIGED_TAG_COMMANDS},
171 {AIC79XX_CONFIGED_TAG_COMMANDS}
175 * The I/O cell on the chip is very configurable in respect to its analog
176 * characteristics. Set the defaults here; they can be overriden with
177 * the proper insmod parameters.
179 struct ahd_linux_iocell_opts
185 #define AIC79XX_DEFAULT_PRECOMP 0xFF
186 #define AIC79XX_DEFAULT_SLEWRATE 0xFF
187 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF
188 #define AIC79XX_DEFAULT_IOOPTS \
190 AIC79XX_DEFAULT_PRECOMP, \
191 AIC79XX_DEFAULT_SLEWRATE, \
192 AIC79XX_DEFAULT_AMPLITUDE \
194 #define AIC79XX_PRECOMP_INDEX 0
195 #define AIC79XX_SLEWRATE_INDEX 1
196 #define AIC79XX_AMPLITUDE_INDEX 2
197 static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
199 AIC79XX_DEFAULT_IOOPTS,
200 AIC79XX_DEFAULT_IOOPTS,
201 AIC79XX_DEFAULT_IOOPTS,
202 AIC79XX_DEFAULT_IOOPTS,
203 AIC79XX_DEFAULT_IOOPTS,
204 AIC79XX_DEFAULT_IOOPTS,
205 AIC79XX_DEFAULT_IOOPTS,
206 AIC79XX_DEFAULT_IOOPTS,
207 AIC79XX_DEFAULT_IOOPTS,
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS,
214 AIC79XX_DEFAULT_IOOPTS
218 * There should be a specific return value for this in scsi.h, but
219 * it seems that most drivers ignore it.
221 #define DID_UNDERFLOW DID_ERROR
224 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
226 printk("(scsi%d:%c:%d:%d): ",
227 ahd->platform_data->host->host_no,
228 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
229 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
230 scb != NULL ? SCB_GET_LUN(scb) : -1);
234 * XXX - these options apply unilaterally to _all_ adapters
235 * cards in the system. This should be fixed. Exceptions to this
236 * rule are noted in the comments.
240 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
241 * has no effect on any later resets that might occur due to things like
244 static uint32_t aic79xx_no_reset;
247 * Should we force EXTENDED translation on a controller.
248 * 0 == Use whatever is in the SEEPROM or default to off
249 * 1 == Use whatever is in the SEEPROM or default to on
251 static uint32_t aic79xx_extended;
254 * PCI bus parity checking of the Adaptec controllers. This is somewhat
255 * dubious at best. To my knowledge, this option has never actually
256 * solved a PCI parity problem, but on certain machines with broken PCI
257 * chipset configurations, it can generate tons of false error messages.
258 * It's included in the driver for completeness.
259 * 0 = Shut off PCI parity check
260 * non-0 = Enable PCI parity check
262 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
263 * variable to -1 you would actually want to simply pass the variable
264 * name without a number. That will invert the 0 which will result in
267 static uint32_t aic79xx_pci_parity = ~0;
270 * There are lots of broken chipsets in the world. Some of them will
271 * violate the PCI spec when we issue byte sized memory writes to our
272 * controller. I/O mapped register access, if allowed by the given
273 * platform, will work in almost all cases.
275 uint32_t aic79xx_allow_memio = ~0;
278 * So that we can set how long each device is given as a selection timeout.
279 * The table of values goes like this:
284 * We default to 256ms because some older devices need a longer time
285 * to respond to initial selection.
287 static uint32_t aic79xx_seltime;
290 * Certain devices do not perform any aging on commands. Should the
291 * device be saturated by commands in one portion of the disk, it is
292 * possible for transactions on far away sectors to never be serviced.
293 * To handle these devices, we can periodically send an ordered tag to
294 * force all outstanding transactions to be serviced prior to a new
297 static uint32_t aic79xx_periodic_otag;
299 /* Some storage boxes are using an LSI chip which has a bug making it
300 * impossible to use aic79xx Rev B chip in 320 speeds. The following
301 * storage boxes have been reported to be buggy:
302 * EonStor 3U 16-Bay: U16U-G3A3
303 * EonStor 2U 12-Bay: U12U-G3A3
304 * SentinelRAID: 2500F R5 / R6
305 * SentinelRAID: 2500F R1
306 * SentinelRAID: 2500F/1500F
309 * To get around this LSI bug, you can set your board to 160 mode
310 * or you can enable the SLOWCRC bit.
312 uint32_t aic79xx_slowcrc;
315 * Module information and settable options.
317 static char *aic79xx = NULL;
319 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
320 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
321 MODULE_LICENSE("Dual BSD/GPL");
322 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
323 module_param(aic79xx, charp, 0444);
324 MODULE_PARM_DESC(aic79xx,
325 "period-delimited options string:\n"
326 " verbose Enable verbose/diagnostic logging\n"
327 " allow_memio Allow device registers to be memory mapped\n"
328 " debug Bitmask of debug values to enable\n"
329 " no_reset Suppress initial bus resets\n"
330 " extended Enable extended geometry on all controllers\n"
331 " periodic_otag Send an ordered tagged transaction\n"
332 " periodically to prevent tag starvation.\n"
333 " This may be required by some older disk\n"
334 " or drives/RAID arrays.\n"
335 " tag_info:<tag_str> Set per-target tag depth\n"
336 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
337 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
338 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
339 " amplitude:<int> Set the signal amplitude (0-7).\n"
340 " seltime:<int> Selection Timeout:\n"
341 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
342 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
344 " Sample modprobe configuration file:\n"
345 " # Enable verbose logging\n"
346 " # Set tag depth on Controller 2/Target 2 to 10 tags\n"
347 " # Shorten the selection timeout to 128ms\n"
349 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
352 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
353 struct scsi_device *,
355 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
356 struct scsi_cmnd *cmd);
357 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
358 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
359 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
360 struct ahd_devinfo *devinfo);
361 static void ahd_linux_device_queue_depth(struct scsi_device *);
362 static int ahd_linux_run_command(struct ahd_softc*,
363 struct ahd_linux_device *,
365 static void ahd_linux_setup_tag_info_global(char *p);
366 static int aic79xx_setup(char *c);
367 static void ahd_freeze_simq(struct ahd_softc *ahd);
368 static void ahd_release_simq(struct ahd_softc *ahd);
370 static int ahd_linux_unit;
373 /************************** OS Utility Wrappers *******************************/
374 void ahd_delay(long);
379 * udelay on Linux can have problems for
380 * multi-millisecond waits. Wait at most
390 /***************************** Low Level I/O **********************************/
391 uint8_t ahd_inb(struct ahd_softc * ahd, long port);
392 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val);
393 void ahd_outw_atomic(struct ahd_softc * ahd,
394 long port, uint16_t val);
395 void ahd_outsb(struct ahd_softc * ahd, long port,
396 uint8_t *, int count);
397 void ahd_insb(struct ahd_softc * ahd, long port,
398 uint8_t *, int count);
401 ahd_inb(struct ahd_softc * ahd, long port)
405 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
406 x = readb(ahd->bshs[0].maddr + port);
408 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
416 ahd_inw_atomic(struct ahd_softc * ahd, long port)
420 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
421 x = readw(ahd->bshs[0].maddr + port);
423 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF));
431 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val)
433 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
434 writeb(val, ahd->bshs[0].maddr + port);
436 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
442 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val)
444 if (ahd->tags[0] == BUS_SPACE_MEMIO) {
445 writew(val, ahd->bshs[0].maddr + port);
447 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF));
453 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
458 * There is probably a more efficient way to do this on Linux
459 * but we don't use this for anything speed critical and this
462 for (i = 0; i < count; i++)
463 ahd_outb(ahd, port, *array++);
467 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count)
472 * There is probably a more efficient way to do this on Linux
473 * but we don't use this for anything speed critical and this
476 for (i = 0; i < count; i++)
477 *array++ = ahd_inb(ahd, port);
480 /******************************* PCI Routines *********************************/
482 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width)
489 pci_read_config_byte(pci, reg, &retval);
495 pci_read_config_word(pci, reg, &retval);
501 pci_read_config_dword(pci, reg, &retval);
505 panic("ahd_pci_read_config: Read size too big");
512 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width)
516 pci_write_config_byte(pci, reg, value);
519 pci_write_config_word(pci, reg, value);
522 pci_write_config_dword(pci, reg, value);
525 panic("ahd_pci_write_config: Write size too big");
530 /****************************** Inlines ***************************************/
531 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
534 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
536 struct scsi_cmnd *cmd;
539 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
543 /******************************** Macros **************************************/
544 #define BUILD_SCSIID(ahd, cmd) \
545 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
548 * Return a string describing the driver.
551 ahd_linux_info(struct Scsi_Host *host)
553 static char buffer[512];
556 struct ahd_softc *ahd;
559 ahd = *(struct ahd_softc **)host->hostdata;
560 memset(bp, 0, sizeof(buffer));
561 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n"
563 strcat(bp, ahd->description);
566 ahd_controller_info(ahd, ahd_info);
567 strcat(bp, ahd_info);
573 * Queue an SCB to the controller.
575 static int ahd_linux_queue_lck(struct scsi_cmnd *cmd)
577 struct ahd_softc *ahd;
578 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
579 int rtn = SCSI_MLQUEUE_HOST_BUSY;
581 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
583 cmd->result = CAM_REQ_INPROG << 16;
584 rtn = ahd_linux_run_command(ahd, dev, cmd);
589 static DEF_SCSI_QCMD(ahd_linux_queue)
591 static struct scsi_target **
592 ahd_linux_target_in_softc(struct scsi_target *starget)
594 struct ahd_softc *ahd =
595 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
596 unsigned int target_offset;
598 target_offset = starget->id;
599 if (starget->channel != 0)
602 return &ahd->platform_data->starget[target_offset];
606 ahd_linux_target_alloc(struct scsi_target *starget)
608 struct ahd_softc *ahd =
609 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
610 struct seeprom_config *sc = ahd->seep_config;
612 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
613 struct ahd_devinfo devinfo;
614 struct ahd_initiator_tinfo *tinfo;
615 struct ahd_tmode_tstate *tstate;
616 char channel = starget->channel + 'A';
618 ahd_lock(ahd, &flags);
620 BUG_ON(*ahd_targp != NULL);
622 *ahd_targp = starget;
625 int flags = sc->device_flags[starget->id];
627 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
628 starget->id, &tstate);
630 if ((flags & CFPACKETIZED) == 0) {
631 /* don't negotiate packetized (IU) transfers */
632 spi_max_iu(starget) = 0;
634 if ((ahd->features & AHD_RTI) == 0)
635 spi_rti(starget) = 0;
638 if ((flags & CFQAS) == 0)
639 spi_max_qas(starget) = 0;
641 /* Transinfo values have been set to BIOS settings */
642 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
643 spi_min_period(starget) = tinfo->user.period;
644 spi_max_offset(starget) = tinfo->user.offset;
647 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
648 starget->id, &tstate);
649 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
650 CAM_LUN_WILDCARD, channel,
652 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
653 AHD_TRANS_GOAL, /*paused*/FALSE);
654 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
655 AHD_TRANS_GOAL, /*paused*/FALSE);
656 ahd_unlock(ahd, &flags);
662 ahd_linux_target_destroy(struct scsi_target *starget)
664 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
670 ahd_linux_slave_alloc(struct scsi_device *sdev)
672 struct ahd_softc *ahd =
673 *((struct ahd_softc **)sdev->host->hostdata);
674 struct ahd_linux_device *dev;
677 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
679 dev = scsi_transport_device_data(sdev);
680 memset(dev, 0, sizeof(*dev));
683 * We start out life using untagged
684 * transactions of which we allow one.
689 * Set maxtags to 0. This will be changed if we
690 * later determine that we are dealing with
691 * a tagged queuing capable device.
699 ahd_linux_slave_configure(struct scsi_device *sdev)
702 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
704 ahd_linux_device_queue_depth(sdev);
706 /* Initial Domain Validation */
707 if (!spi_initial_dv(sdev->sdev_target))
713 #if defined(__i386__)
715 * Return the disk geometry for the given SCSI device.
718 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
719 sector_t capacity, int geom[])
725 struct ahd_softc *ahd;
727 ahd = *((struct ahd_softc **)sdev->host->hostdata);
729 if (scsi_partsize(bdev, capacity, geom))
734 cylinders = aic_sector_div(capacity, heads, sectors);
736 if (aic79xx_extended != 0)
739 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
740 if (extended && cylinders >= 1024) {
743 cylinders = aic_sector_div(capacity, heads, sectors);
753 * Abort the current SCSI command(s).
756 ahd_linux_abort(struct scsi_cmnd *cmd)
758 return ahd_linux_queue_abort_cmd(cmd);
762 * Attempt to send a target reset message to the device that timed out.
765 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
767 struct ahd_softc *ahd;
768 struct ahd_linux_device *dev;
769 struct scb *reset_scb;
771 int retval = SUCCESS;
772 struct ahd_initiator_tinfo *tinfo;
773 struct ahd_tmode_tstate *tstate;
775 DECLARE_COMPLETION_ONSTACK(done);
779 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
781 scmd_printk(KERN_INFO, cmd,
782 "Attempting to queue a TARGET RESET message:");
785 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
786 printk(" 0x%x", cmd->cmnd[cdb_byte]);
790 * Determine if we currently own this command.
792 dev = scsi_transport_device_data(cmd->device);
796 * No target device for this command exists,
797 * so we must not still own the command.
799 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
804 * Generate us a new SCB
806 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
808 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
812 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
813 cmd->device->id, &tstate);
814 reset_scb->io_ctx = cmd;
815 reset_scb->platform_data->dev = dev;
816 reset_scb->sg_count = 0;
817 ahd_set_residual(reset_scb, 0);
818 ahd_set_sense_residual(reset_scb, 0);
819 reset_scb->platform_data->xfer_len = 0;
820 reset_scb->hscb->control = 0;
821 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
822 reset_scb->hscb->lun = cmd->device->lun;
823 reset_scb->hscb->cdb_len = 0;
824 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
825 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
826 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
827 reset_scb->flags |= SCB_PACKETIZED;
829 reset_scb->hscb->control |= MK_MESSAGE;
833 dev->commands_issued++;
835 ahd_lock(ahd, &flags);
837 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
838 ahd_queue_scb(ahd, reset_scb);
840 ahd->platform_data->eh_done = &done;
841 ahd_unlock(ahd, &flags);
843 printk("%s: Device reset code sleeping\n", ahd_name(ahd));
844 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
845 ahd_lock(ahd, &flags);
846 ahd->platform_data->eh_done = NULL;
847 ahd_unlock(ahd, &flags);
848 printk("%s: Device reset timer expired (active %d)\n",
849 ahd_name(ahd), dev->active);
852 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
858 * Reset the SCSI bus.
861 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
863 struct ahd_softc *ahd;
867 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
869 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
870 printk("%s: Bus reset called for cmd %p\n",
873 ahd_lock(ahd, &flags);
875 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
876 /*initiate reset*/TRUE);
877 ahd_unlock(ahd, &flags);
880 printk("%s: SCSI bus reset delivered. "
881 "%d SCBs aborted.\n", ahd_name(ahd), found);
886 struct scsi_host_template aic79xx_driver_template = {
887 .module = THIS_MODULE,
889 .proc_name = "aic79xx",
890 .show_info = ahd_linux_show_info,
891 .write_info = ahd_proc_write_seeprom,
892 .info = ahd_linux_info,
893 .queuecommand = ahd_linux_queue,
894 .eh_abort_handler = ahd_linux_abort,
895 .eh_device_reset_handler = ahd_linux_dev_reset,
896 .eh_bus_reset_handler = ahd_linux_bus_reset,
897 #if defined(__i386__)
898 .bios_param = ahd_linux_biosparam,
900 .can_queue = AHD_MAX_QUEUE,
904 .slave_alloc = ahd_linux_slave_alloc,
905 .slave_configure = ahd_linux_slave_configure,
906 .target_alloc = ahd_linux_target_alloc,
907 .target_destroy = ahd_linux_target_destroy,
910 /******************************** Bus DMA *************************************/
912 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
913 bus_size_t alignment, bus_size_t boundary,
914 dma_addr_t lowaddr, dma_addr_t highaddr,
915 bus_dma_filter_t *filter, void *filterarg,
916 bus_size_t maxsize, int nsegments,
917 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
921 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
926 * Linux is very simplistic about DMA memory. For now don't
927 * maintain all specification information. Once Linux supplies
928 * better facilities for doing these operations, or the
929 * needs of this particular driver change, we might need to do
932 dmat->alignment = alignment;
933 dmat->boundary = boundary;
934 dmat->maxsize = maxsize;
940 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
946 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
947 int flags, bus_dmamap_t *mapp)
949 *vaddr = dma_alloc_coherent(&ahd->dev_softc->dev, dmat->maxsize, mapp,
957 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
958 void* vaddr, bus_dmamap_t map)
960 dma_free_coherent(&ahd->dev_softc->dev, dmat->maxsize, vaddr, map);
964 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
965 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
966 void *cb_arg, int flags)
969 * Assume for now that this will only be used during
970 * initialization and not for per-transaction buffer mapping.
972 bus_dma_segment_t stack_sg;
974 stack_sg.ds_addr = map;
975 stack_sg.ds_len = dmat->maxsize;
976 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
981 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
986 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
992 /********************* Platform Dependent Functions ***************************/
994 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
998 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
999 uint8_t *iocell_info;
1001 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1002 iocell_info[index] = value & 0xFFFF;
1004 printk("iocell[%d:%ld] = %d\n", instance, index, value);
1009 ahd_linux_setup_tag_info_global(char *p)
1013 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1014 printk("Setting Global Tags= %d\n", tags);
1016 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1017 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1018 aic79xx_tag_info[i].tag_commands[j] = tags;
1024 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1027 if ((instance >= 0) && (targ >= 0)
1028 && (instance < ARRAY_SIZE(aic79xx_tag_info))
1029 && (targ < AHD_NUM_TARGETS)) {
1030 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1032 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1037 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1038 void (*callback)(u_long, int, int, int32_t),
1039 u_long callback_arg)
1047 char tok_list[] = {'.', ',', '{', '}', '\0'};
1049 /* All options use a ':' name/arg separator */
1050 if (*opt_arg != ':')
1057 * Restore separator that may be in
1058 * the middle of our option argument.
1060 tok_end = strchr(opt_arg, '\0');
1066 if (instance == -1) {
1073 printk("Malformed Option %s\n",
1083 else if (instance != -1)
1093 else if (instance >= 0)
1102 for (i = 0; tok_list[i]; i++) {
1103 tok_end2 = strchr(opt_arg, tok_list[i]);
1104 if ((tok_end2) && (tok_end2 < tok_end))
1107 callback(callback_arg, instance, targ,
1108 simple_strtol(opt_arg, NULL, 0));
1117 * Handle Linux boot parameters. This routine allows for assigning a value
1118 * to a parameter with a ':' between the parameter and the value.
1119 * ie. aic79xx=stpwlev:1,extended
1122 aic79xx_setup(char *s)
1128 static const struct {
1132 { "extended", &aic79xx_extended },
1133 { "no_reset", &aic79xx_no_reset },
1134 { "verbose", &aic79xx_verbose },
1135 { "allow_memio", &aic79xx_allow_memio},
1137 { "debug", &ahd_debug },
1139 { "periodic_otag", &aic79xx_periodic_otag },
1140 { "pci_parity", &aic79xx_pci_parity },
1141 { "seltime", &aic79xx_seltime },
1142 { "tag_info", NULL },
1143 { "global_tag_depth", NULL},
1144 { "slewrate", NULL },
1145 { "precomp", NULL },
1146 { "amplitude", NULL },
1147 { "slowcrc", &aic79xx_slowcrc },
1150 end = strchr(s, '\0');
1153 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1154 * will never be 0 in this case.
1158 while ((p = strsep(&s, ",.")) != NULL) {
1161 for (i = 0; i < ARRAY_SIZE(options); i++) {
1163 n = strlen(options[i].name);
1164 if (strncmp(options[i].name, p, n) == 0)
1167 if (i == ARRAY_SIZE(options))
1170 if (strncmp(p, "global_tag_depth", n) == 0) {
1171 ahd_linux_setup_tag_info_global(p + n);
1172 } else if (strncmp(p, "tag_info", n) == 0) {
1173 s = ahd_parse_brace_option("tag_info", p + n, end,
1174 2, ahd_linux_setup_tag_info, 0);
1175 } else if (strncmp(p, "slewrate", n) == 0) {
1176 s = ahd_parse_brace_option("slewrate",
1177 p + n, end, 1, ahd_linux_setup_iocell_info,
1178 AIC79XX_SLEWRATE_INDEX);
1179 } else if (strncmp(p, "precomp", n) == 0) {
1180 s = ahd_parse_brace_option("precomp",
1181 p + n, end, 1, ahd_linux_setup_iocell_info,
1182 AIC79XX_PRECOMP_INDEX);
1183 } else if (strncmp(p, "amplitude", n) == 0) {
1184 s = ahd_parse_brace_option("amplitude",
1185 p + n, end, 1, ahd_linux_setup_iocell_info,
1186 AIC79XX_AMPLITUDE_INDEX);
1187 } else if (p[n] == ':') {
1188 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1189 } else if (!strncmp(p, "verbose", n)) {
1190 *(options[i].flag) = 1;
1192 *(options[i].flag) ^= 0xFFFFFFFF;
1198 __setup("aic79xx=", aic79xx_setup);
1200 uint32_t aic79xx_verbose;
1203 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1206 struct Scsi_Host *host;
1211 template->name = ahd->description;
1212 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1216 *((struct ahd_softc **)host->hostdata) = ahd;
1217 ahd->platform_data->host = host;
1218 host->can_queue = AHD_MAX_QUEUE;
1219 host->cmd_per_lun = 2;
1220 host->sg_tablesize = AHD_NSEG;
1221 host->this_id = ahd->our_id;
1222 host->irq = ahd->platform_data->irq;
1223 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1224 host->max_lun = AHD_NUM_LUNS;
1225 host->max_channel = 0;
1226 host->sg_tablesize = AHD_NSEG;
1228 ahd_set_unit(ahd, ahd_linux_unit++);
1229 ahd_unlock(ahd, &s);
1230 sprintf(buf, "scsi%d", host->host_no);
1231 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1232 if (new_name != NULL) {
1233 strcpy(new_name, buf);
1234 ahd_set_name(ahd, new_name);
1236 host->unique_id = ahd->unit;
1237 ahd_linux_initialize_scsi_bus(ahd);
1238 ahd_intr_enable(ahd, TRUE);
1240 host->transportt = ahd_linux_transport_template;
1242 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1244 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1245 scsi_host_put(host);
1249 scsi_scan_host(host);
1254 * Place the SCSI bus into a known state by either resetting it,
1255 * or forcing transfer negotiations on the next command to any
1259 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1268 if (aic79xx_no_reset != 0)
1269 ahd->flags &= ~AHD_RESET_BUS_A;
1271 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1272 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1274 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1279 * Force negotiation to async for all targets that
1280 * will not see an initial bus reset.
1282 for (; target_id < numtarg; target_id++) {
1283 struct ahd_devinfo devinfo;
1284 struct ahd_initiator_tinfo *tinfo;
1285 struct ahd_tmode_tstate *tstate;
1287 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1288 target_id, &tstate);
1289 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1290 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1291 ahd_update_neg_request(ahd, &devinfo, tstate,
1292 tinfo, AHD_NEG_ALWAYS);
1294 ahd_unlock(ahd, &s);
1295 /* Give the bus some time to recover */
1296 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1297 ahd_freeze_simq(ahd);
1298 msleep(AIC79XX_RESET_DELAY);
1299 ahd_release_simq(ahd);
1304 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1306 ahd->platform_data =
1307 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
1308 if (ahd->platform_data == NULL)
1310 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1312 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1317 ahd_platform_free(struct ahd_softc *ahd)
1319 struct scsi_target *starget;
1322 if (ahd->platform_data != NULL) {
1323 /* destroy all of the device and target objects */
1324 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1325 starget = ahd->platform_data->starget[i];
1326 if (starget != NULL) {
1327 ahd->platform_data->starget[i] = NULL;
1331 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1332 free_irq(ahd->platform_data->irq, ahd);
1333 if (ahd->tags[0] == BUS_SPACE_PIO
1334 && ahd->bshs[0].ioport != 0)
1335 release_region(ahd->bshs[0].ioport, 256);
1336 if (ahd->tags[1] == BUS_SPACE_PIO
1337 && ahd->bshs[1].ioport != 0)
1338 release_region(ahd->bshs[1].ioport, 256);
1339 if (ahd->tags[0] == BUS_SPACE_MEMIO
1340 && ahd->bshs[0].maddr != NULL) {
1341 iounmap(ahd->bshs[0].maddr);
1342 release_mem_region(ahd->platform_data->mem_busaddr,
1345 if (ahd->platform_data->host)
1346 scsi_host_put(ahd->platform_data->host);
1348 kfree(ahd->platform_data);
1353 ahd_platform_init(struct ahd_softc *ahd)
1356 * Lookup and commit any modified IO Cell options.
1358 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1359 const struct ahd_linux_iocell_opts *iocell_opts;
1361 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1362 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1363 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1364 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1365 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1366 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1367 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1373 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1375 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1376 SCB_GET_CHANNEL(ahd, scb),
1377 SCB_GET_LUN(scb), SCB_LIST_NULL,
1378 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1382 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1383 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1385 struct ahd_linux_device *dev;
1392 dev = scsi_transport_device_data(sdev);
1396 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1399 case AHD_QUEUE_NONE:
1402 case AHD_QUEUE_BASIC:
1403 now_queuing = AHD_DEV_Q_BASIC;
1405 case AHD_QUEUE_TAGGED:
1406 now_queuing = AHD_DEV_Q_TAGGED;
1409 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1410 && (was_queuing != now_queuing)
1411 && (dev->active != 0)) {
1412 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1416 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1420 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1423 * Start out aggressively and allow our
1424 * dynamic queue depth algorithm to take
1427 dev->maxtags = usertags;
1428 dev->openings = dev->maxtags - dev->active;
1430 if (dev->maxtags == 0) {
1432 * Queueing is disabled by the user.
1435 } else if (alg == AHD_QUEUE_TAGGED) {
1436 dev->flags |= AHD_DEV_Q_TAGGED;
1437 if (aic79xx_periodic_otag != 0)
1438 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1440 dev->flags |= AHD_DEV_Q_BASIC;
1442 /* We can only have one opening. */
1444 dev->openings = 1 - dev->active;
1447 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1448 case AHD_DEV_Q_BASIC:
1449 case AHD_DEV_Q_TAGGED:
1450 scsi_change_queue_depth(sdev,
1451 dev->openings + dev->active);
1455 * We allow the OS to queue 2 untagged transactions to
1456 * us at any time even though we can only execute them
1457 * serially on the controller/device. This should
1458 * remove some latency.
1460 scsi_change_queue_depth(sdev, 1);
1466 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1467 int lun, u_int tag, role_t role, uint32_t status)
1473 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1475 static int warned_user;
1479 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1480 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1482 if (warned_user == 0) {
1484 "aic79xx: WARNING: Insufficient tag_info instances\n"
1485 "aic79xx: for installed controllers. Using defaults\n"
1486 "aic79xx: Please update the aic79xx_tag_info array in\n"
1487 "aic79xx: the aic79xx_osm.c source file.\n");
1490 tags = AHD_MAX_QUEUE;
1492 adapter_tag_info_t *tag_info;
1494 tag_info = &aic79xx_tag_info[ahd->unit];
1495 tags = tag_info->tag_commands[devinfo->target_offset];
1496 if (tags > AHD_MAX_QUEUE)
1497 tags = AHD_MAX_QUEUE;
1504 * Determines the queue depth for a given device.
1507 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1509 struct ahd_devinfo devinfo;
1511 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1513 ahd_compile_devinfo(&devinfo,
1515 sdev->sdev_target->id, sdev->lun,
1516 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1518 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1519 if (tags != 0 && sdev->tagged_supported != 0) {
1521 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1522 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1523 devinfo.lun, AC_TRANSFER_NEG);
1524 ahd_print_devinfo(ahd, &devinfo);
1525 printk("Tagged Queuing enabled. Depth %d\n", tags);
1527 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1528 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1529 devinfo.lun, AC_TRANSFER_NEG);
1534 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1535 struct scsi_cmnd *cmd)
1538 struct hardware_scb *hscb;
1539 struct ahd_initiator_tinfo *tinfo;
1540 struct ahd_tmode_tstate *tstate;
1543 unsigned long flags;
1546 nseg = scsi_dma_map(cmd);
1548 return SCSI_MLQUEUE_HOST_BUSY;
1550 ahd_lock(ahd, &flags);
1553 * Get an scb to use.
1555 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1556 cmd->device->id, &tstate);
1557 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1558 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1559 col_idx = AHD_NEVER_COL_IDX;
1561 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1564 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1565 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1566 ahd_unlock(ahd, &flags);
1567 scsi_dma_unmap(cmd);
1568 return SCSI_MLQUEUE_HOST_BUSY;
1572 scb->platform_data->dev = dev;
1574 cmd->host_scribble = (char *)scb;
1577 * Fill out basics of the HSCB.
1580 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1581 hscb->lun = cmd->device->lun;
1582 scb->hscb->task_management = 0;
1583 mask = SCB_GET_TARGET_MASK(ahd, scb);
1585 if ((ahd->user_discenable & mask) != 0)
1586 hscb->control |= DISCENB;
1588 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1589 scb->flags |= SCB_PACKETIZED;
1591 if ((tstate->auto_negotiate & mask) != 0) {
1592 scb->flags |= SCB_AUTO_NEGOTIATE;
1593 scb->hscb->control |= MK_MESSAGE;
1596 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1597 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1598 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1599 hscb->control |= ORDERED_QUEUE_TAG;
1600 dev->commands_since_idle_or_otag = 0;
1602 hscb->control |= SIMPLE_QUEUE_TAG;
1606 hscb->cdb_len = cmd->cmd_len;
1607 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1609 scb->platform_data->xfer_len = 0;
1610 ahd_set_residual(scb, 0);
1611 ahd_set_sense_residual(scb, 0);
1615 void *sg = scb->sg_list;
1616 struct scatterlist *cur_seg;
1619 scb->platform_data->xfer_len = 0;
1621 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1625 addr = sg_dma_address(cur_seg);
1626 len = sg_dma_len(cur_seg);
1627 scb->platform_data->xfer_len += len;
1628 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1633 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1636 dev->commands_issued++;
1638 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1639 dev->commands_since_idle_or_otag++;
1640 scb->flags |= SCB_ACTIVE;
1641 ahd_queue_scb(ahd, scb);
1643 ahd_unlock(ahd, &flags);
1649 * SCSI controller interrupt handler.
1652 ahd_linux_isr(int irq, void *dev_id)
1654 struct ahd_softc *ahd;
1658 ahd = (struct ahd_softc *) dev_id;
1659 ahd_lock(ahd, &flags);
1660 ours = ahd_intr(ahd);
1661 ahd_unlock(ahd, &flags);
1662 return IRQ_RETVAL(ours);
1666 ahd_send_async(struct ahd_softc *ahd, char channel,
1667 u_int target, u_int lun, ac_code code)
1670 case AC_TRANSFER_NEG:
1672 struct scsi_target *starget;
1673 struct ahd_initiator_tinfo *tinfo;
1674 struct ahd_tmode_tstate *tstate;
1675 unsigned int target_ppr_options;
1677 BUG_ON(target == CAM_TARGET_WILDCARD);
1679 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1683 * Don't bother reporting results while
1684 * negotiations are still pending.
1686 if (tinfo->curr.period != tinfo->goal.period
1687 || tinfo->curr.width != tinfo->goal.width
1688 || tinfo->curr.offset != tinfo->goal.offset
1689 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1690 if (bootverbose == 0)
1694 * Don't bother reporting results that
1695 * are identical to those last reported.
1697 starget = ahd->platform_data->starget[target];
1698 if (starget == NULL)
1701 target_ppr_options =
1702 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1703 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1704 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1705 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1706 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1707 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1708 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1709 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1711 if (tinfo->curr.period == spi_period(starget)
1712 && tinfo->curr.width == spi_width(starget)
1713 && tinfo->curr.offset == spi_offset(starget)
1714 && tinfo->curr.ppr_options == target_ppr_options)
1715 if (bootverbose == 0)
1718 spi_period(starget) = tinfo->curr.period;
1719 spi_width(starget) = tinfo->curr.width;
1720 spi_offset(starget) = tinfo->curr.offset;
1721 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1722 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1723 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1724 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1725 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1726 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1727 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1728 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1729 spi_display_xfer_agreement(starget);
1734 WARN_ON(lun != CAM_LUN_WILDCARD);
1735 scsi_report_device_reset(ahd->platform_data->host,
1736 channel - 'A', target);
1740 if (ahd->platform_data->host != NULL) {
1741 scsi_report_bus_reset(ahd->platform_data->host,
1746 panic("ahd_send_async: Unexpected async event");
1751 * Calls the higher level scsi done function and frees the scb.
1754 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1756 struct scsi_cmnd *cmd;
1757 struct ahd_linux_device *dev;
1759 if ((scb->flags & SCB_ACTIVE) == 0) {
1760 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1761 ahd_dump_card_state(ahd);
1762 panic("Stopping for safety");
1764 LIST_REMOVE(scb, pending_links);
1766 dev = scb->platform_data->dev;
1769 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1770 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1773 ahd_linux_unmap_scb(ahd, scb);
1776 * Guard against stale sense data.
1777 * The Linux mid-layer assumes that sense
1778 * was retrieved anytime the first byte of
1779 * the sense buffer looks "sane".
1781 cmd->sense_buffer[0] = 0;
1782 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1783 #ifdef AHD_REPORT_UNDERFLOWS
1784 uint32_t amount_xferred;
1787 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1789 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1791 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1792 ahd_print_path(ahd, scb);
1793 printk("Set CAM_UNCOR_PARITY\n");
1796 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1797 #ifdef AHD_REPORT_UNDERFLOWS
1799 * This code is disabled by default as some
1800 * clients of the SCSI system do not properly
1801 * initialize the underflow parameter. This
1802 * results in spurious termination of commands
1803 * that complete as expected (e.g. underflow is
1804 * allowed as command can return variable amounts
1807 } else if (amount_xferred < scb->io_ctx->underflow) {
1810 ahd_print_path(ahd, scb);
1812 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1813 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1815 ahd_print_path(ahd, scb);
1816 printk("Saw underflow (%ld of %ld bytes). "
1817 "Treated as error\n",
1818 ahd_get_residual(scb),
1819 ahd_get_transfer_length(scb));
1820 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1823 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1825 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1826 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1829 if (dev->openings == 1
1830 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1831 && ahd_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL)
1832 dev->tag_success_count++;
1834 * Some devices deal with temporary internal resource
1835 * shortages by returning queue full. When the queue
1836 * full occurrs, we throttle back. Slowly try to get
1837 * back to our previous queue depth.
1839 if ((dev->openings + dev->active) < dev->maxtags
1840 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1841 dev->tag_success_count = 0;
1845 if (dev->active == 0)
1846 dev->commands_since_idle_or_otag = 0;
1848 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1849 printk("Recovery SCB completes\n");
1850 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1851 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1852 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1854 if (ahd->platform_data->eh_done)
1855 complete(ahd->platform_data->eh_done);
1858 ahd_free_scb(ahd, scb);
1859 ahd_linux_queue_cmd_complete(ahd, cmd);
1863 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1864 struct scsi_device *sdev, struct scb *scb)
1866 struct ahd_devinfo devinfo;
1867 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1869 ahd_compile_devinfo(&devinfo,
1871 sdev->sdev_target->id, sdev->lun,
1872 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1876 * We don't currently trust the mid-layer to
1877 * properly deal with queue full or busy. So,
1878 * when one occurs, we tell the mid-layer to
1879 * unconditionally requeue the command to us
1880 * so that we can retry it ourselves. We also
1881 * implement our own throttling mechanism so
1882 * we don't clobber the device with too many
1885 switch (ahd_get_scsi_status(scb)) {
1888 case SAM_STAT_CHECK_CONDITION:
1889 case SAM_STAT_COMMAND_TERMINATED:
1891 struct scsi_cmnd *cmd;
1894 * Copy sense information to the OS's cmd
1895 * structure if it is available.
1898 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1899 struct scsi_status_iu_header *siu;
1903 if (scb->flags & SCB_SENSE) {
1904 sense_size = min(sizeof(struct scsi_sense_data)
1905 - ahd_get_sense_residual(scb),
1906 (u_long)SCSI_SENSE_BUFFERSIZE);
1910 * Copy only the sense data into the provided
1913 siu = (struct scsi_status_iu_header *)
1915 sense_size = min_t(size_t,
1916 scsi_4btoul(siu->sense_length),
1917 SCSI_SENSE_BUFFERSIZE);
1918 sense_offset = SIU_SENSE_OFFSET(siu);
1921 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1922 memcpy(cmd->sense_buffer,
1923 ahd_get_sense_buf(ahd, scb)
1924 + sense_offset, sense_size);
1925 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION);
1928 if (ahd_debug & AHD_SHOW_SENSE) {
1931 printk("Copied %d bytes of sense data at %d:",
1932 sense_size, sense_offset);
1933 for (i = 0; i < sense_size; i++) {
1936 printk("0x%x ", cmd->sense_buffer[i]);
1944 case SAM_STAT_TASK_SET_FULL:
1946 * By the time the core driver has returned this
1947 * command, all other commands that were queued
1948 * to us but not the device have been returned.
1949 * This ensures that dev->active is equal to
1950 * the number of commands actually queued to
1953 dev->tag_success_count = 0;
1954 if (dev->active != 0) {
1956 * Drop our opening count to the number
1957 * of commands currently outstanding.
1961 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1962 ahd_print_path(ahd, scb);
1963 printk("Dropping tag count to %d\n",
1967 if (dev->active == dev->tags_on_last_queuefull) {
1969 dev->last_queuefull_same_count++;
1971 * If we repeatedly see a queue full
1972 * at the same queue depth, this
1973 * device has a fixed number of tag
1974 * slots. Lock in this tag depth
1975 * so we stop seeing queue fulls from
1978 if (dev->last_queuefull_same_count
1979 == AHD_LOCK_TAGS_COUNT) {
1980 dev->maxtags = dev->active;
1981 ahd_print_path(ahd, scb);
1982 printk("Locking max tag count at %d\n",
1986 dev->tags_on_last_queuefull = dev->active;
1987 dev->last_queuefull_same_count = 0;
1989 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1990 ahd_set_scsi_status(scb, SAM_STAT_GOOD);
1991 ahd_platform_set_tags(ahd, sdev, &devinfo,
1992 (dev->flags & AHD_DEV_Q_BASIC)
1993 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1997 * Drop down to a single opening, and treat this
1998 * as if the target returned BUSY SCSI status.
2001 ahd_platform_set_tags(ahd, sdev, &devinfo,
2002 (dev->flags & AHD_DEV_Q_BASIC)
2003 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2004 ahd_set_scsi_status(scb, SAM_STAT_BUSY);
2009 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2012 int new_status = DID_OK;
2013 int do_fallback = 0;
2015 struct scsi_sense_data *sense;
2018 * Map CAM error codes into Linux Error codes. We
2019 * avoid the conversion so that the DV code has the
2020 * full error information available when making
2021 * state change decisions.
2024 status = ahd_cmd_get_transaction_status(cmd);
2026 case CAM_REQ_INPROG:
2028 new_status = DID_OK;
2030 case CAM_AUTOSENSE_FAIL:
2031 new_status = DID_ERROR;
2033 case CAM_SCSI_STATUS_ERROR:
2034 scsi_status = ahd_cmd_get_scsi_status(cmd);
2036 switch(scsi_status) {
2037 case SAM_STAT_COMMAND_TERMINATED:
2038 case SAM_STAT_CHECK_CONDITION:
2039 sense = (struct scsi_sense_data *)
2041 if (sense->extra_len >= 5 &&
2042 (sense->add_sense_code == 0x47
2043 || sense->add_sense_code == 0x48))
2050 case CAM_REQ_ABORTED:
2051 new_status = DID_ABORT;
2054 new_status = DID_BUS_BUSY;
2056 case CAM_REQ_INVALID:
2057 case CAM_PATH_INVALID:
2058 new_status = DID_BAD_TARGET;
2060 case CAM_SEL_TIMEOUT:
2061 new_status = DID_NO_CONNECT;
2063 case CAM_SCSI_BUS_RESET:
2065 new_status = DID_RESET;
2067 case CAM_UNCOR_PARITY:
2068 new_status = DID_PARITY;
2071 case CAM_CMD_TIMEOUT:
2072 new_status = DID_TIME_OUT;
2075 case CAM_REQ_CMP_ERR:
2076 case CAM_UNEXP_BUSFREE:
2077 case CAM_DATA_RUN_ERR:
2078 new_status = DID_ERROR;
2083 case CAM_SEQUENCE_FAIL:
2084 case CAM_CCB_LEN_ERR:
2085 case CAM_PROVIDE_FAIL:
2086 case CAM_REQ_TERMIO:
2087 case CAM_UNREC_HBA_ERROR:
2088 case CAM_REQ_TOO_BIG:
2089 new_status = DID_ERROR;
2091 case CAM_REQUEUE_REQ:
2092 new_status = DID_REQUEUE;
2095 /* We should never get here */
2096 new_status = DID_ERROR;
2101 printk("%s: device overrun (status %x) on %d:%d:%d\n",
2102 ahd_name(ahd), status, cmd->device->channel,
2103 cmd->device->id, (u8)cmd->device->lun);
2106 ahd_cmd_set_transaction_status(cmd, new_status);
2112 ahd_freeze_simq(struct ahd_softc *ahd)
2114 scsi_block_requests(ahd->platform_data->host);
2118 ahd_release_simq(struct ahd_softc *ahd)
2120 scsi_unblock_requests(ahd->platform_data->host);
2124 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2126 struct ahd_softc *ahd;
2127 struct ahd_linux_device *dev;
2128 struct scb *pending_scb;
2130 u_int active_scbptr;
2133 int retval = SUCCESS;
2138 ahd_mode_state saved_modes;
2139 unsigned long flags;
2144 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2146 scmd_printk(KERN_INFO, cmd,
2147 "Attempting to queue an ABORT message:");
2150 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2151 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2154 ahd_lock(ahd, &flags);
2157 * First determine if we currently own this command.
2158 * Start by searching the device queue. If not found
2159 * there, check the pending_scb list. If not found
2160 * at all, and the system wanted us to just abort the
2161 * command, return success.
2163 dev = scsi_transport_device_data(cmd->device);
2167 * No target device for this command exists,
2168 * so we must not still own the command.
2170 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2175 * See if we can find a matching cmd in the pending list.
2177 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2178 if (pending_scb->io_ctx == cmd)
2182 if (pending_scb == NULL) {
2183 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2187 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2189 * We can't queue two recovery actions using the same SCB
2196 * Ensure that the card doesn't do anything
2197 * behind our back. Also make sure that we
2198 * didn't "just" miss an interrupt that would
2201 was_paused = ahd_is_paused(ahd);
2202 ahd_pause_and_flushwork(ahd);
2205 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2206 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2210 printk("%s: At time of recovery, card was %spaused\n",
2211 ahd_name(ahd), was_paused ? "" : "not ");
2212 ahd_dump_card_state(ahd);
2214 disconnected = TRUE;
2215 if (ahd_search_qinfifo(ahd, cmd->device->id,
2216 cmd->device->channel + 'A',
2218 pending_scb->hscb->tag,
2219 ROLE_INITIATOR, CAM_REQ_ABORTED,
2220 SEARCH_COMPLETE) > 0) {
2221 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2222 ahd_name(ahd), cmd->device->channel,
2223 cmd->device->id, (u8)cmd->device->lun);
2227 saved_modes = ahd_save_modes(ahd);
2228 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2229 last_phase = ahd_inb(ahd, LASTPHASE);
2230 saved_scbptr = ahd_get_scbptr(ahd);
2231 active_scbptr = saved_scbptr;
2232 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2233 struct scb *bus_scb;
2235 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2236 if (bus_scb == pending_scb)
2237 disconnected = FALSE;
2241 * At this point, pending_scb is the scb associated with the
2242 * passed in command. That command is currently active on the
2243 * bus or is in the disconnected state.
2245 ahd_inb(ahd, SAVED_SCSIID);
2246 if (last_phase != P_BUSFREE
2247 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2250 * We're active on the bus, so assert ATN
2251 * and hope that the target responds.
2253 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2254 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2255 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2256 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2257 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2259 } else if (disconnected) {
2262 * Actually re-queue this SCB in an attempt
2263 * to select the device before it reconnects.
2265 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2266 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2267 pending_scb->hscb->cdb_len = 0;
2268 pending_scb->hscb->task_attribute = 0;
2269 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2271 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2273 * Mark the SCB has having an outstanding
2274 * task management function. Should the command
2275 * complete normally before the task management
2276 * function can be sent, the host will be notified
2277 * to abort our requeued SCB.
2279 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2280 pending_scb->hscb->task_management);
2283 * If non-packetized, set the MK_MESSAGE control
2284 * bit indicating that we desire to send a message.
2285 * We also set the disconnected flag since there is
2286 * no guarantee that our SCB control byte matches
2287 * the version on the card. We don't want the
2288 * sequencer to abort the command thinking an
2289 * unsolicited reselection occurred.
2291 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2294 * The sequencer will never re-reference the
2295 * in-core SCB. To make sure we are notified
2296 * during reselection, set the MK_MESSAGE flag in
2297 * the card's copy of the SCB.
2299 ahd_outb(ahd, SCB_CONTROL,
2300 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2304 * Clear out any entries in the QINFIFO first
2305 * so we are the next SCB for this target
2308 ahd_search_qinfifo(ahd, cmd->device->id,
2309 cmd->device->channel + 'A', cmd->device->lun,
2310 SCB_LIST_NULL, ROLE_INITIATOR,
2311 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2312 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2313 ahd_set_scbptr(ahd, saved_scbptr);
2314 ahd_print_path(ahd, pending_scb);
2315 printk("Device is disconnected, re-queuing SCB\n");
2318 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2323 ahd_restore_modes(ahd, saved_modes);
2328 DECLARE_COMPLETION_ONSTACK(done);
2330 ahd->platform_data->eh_done = &done;
2331 ahd_unlock(ahd, &flags);
2333 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
2334 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2335 ahd_lock(ahd, &flags);
2336 ahd->platform_data->eh_done = NULL;
2337 ahd_unlock(ahd, &flags);
2338 printk("%s: Timer Expired (active %d)\n",
2339 ahd_name(ahd), dev->active);
2342 printk("Recovery code awake\n");
2344 ahd_unlock(ahd, &flags);
2346 if (retval != SUCCESS)
2347 printk("%s: Command abort returning 0x%x\n",
2348 ahd_name(ahd), retval);
2353 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2355 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2356 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2357 struct ahd_devinfo devinfo;
2358 unsigned long flags;
2360 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2361 starget->channel + 'A', ROLE_INITIATOR);
2362 ahd_lock(ahd, &flags);
2363 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2364 ahd_unlock(ahd, &flags);
2367 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2369 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2370 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2371 struct ahd_tmode_tstate *tstate;
2372 struct ahd_initiator_tinfo *tinfo
2373 = ahd_fetch_transinfo(ahd,
2374 starget->channel + 'A',
2375 shost->this_id, starget->id, &tstate);
2376 struct ahd_devinfo devinfo;
2377 unsigned int ppr_options = tinfo->goal.ppr_options;
2379 unsigned long flags;
2380 unsigned long offset = tinfo->goal.offset;
2383 if ((ahd_debug & AHD_SHOW_DV) != 0)
2384 printk("%s: set period to %d\n", ahd_name(ahd), period);
2387 offset = MAX_OFFSET;
2392 if (spi_max_width(starget)) {
2393 ppr_options |= MSG_EXT_PPR_DT_REQ;
2395 ppr_options |= MSG_EXT_PPR_IU_REQ;
2400 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2402 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2403 starget->channel + 'A', ROLE_INITIATOR);
2405 /* all PPR requests apart from QAS require wide transfers */
2406 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2407 if (spi_width(starget) == 0)
2408 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2411 ahd_find_syncrate(ahd, &period, &ppr_options,
2412 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2414 ahd_lock(ahd, &flags);
2415 ahd_set_syncrate(ahd, &devinfo, period, offset,
2416 ppr_options, AHD_TRANS_GOAL, FALSE);
2417 ahd_unlock(ahd, &flags);
2420 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2422 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2423 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2424 struct ahd_tmode_tstate *tstate;
2425 struct ahd_initiator_tinfo *tinfo
2426 = ahd_fetch_transinfo(ahd,
2427 starget->channel + 'A',
2428 shost->this_id, starget->id, &tstate);
2429 struct ahd_devinfo devinfo;
2430 unsigned int ppr_options = 0;
2431 unsigned int period = 0;
2432 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2433 unsigned long flags;
2436 if ((ahd_debug & AHD_SHOW_DV) != 0)
2437 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
2440 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2441 starget->channel + 'A', ROLE_INITIATOR);
2443 period = tinfo->goal.period;
2444 ppr_options = tinfo->goal.ppr_options;
2445 ahd_find_syncrate(ahd, &period, &ppr_options,
2446 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2449 ahd_lock(ahd, &flags);
2450 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2451 AHD_TRANS_GOAL, FALSE);
2452 ahd_unlock(ahd, &flags);
2455 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2457 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2458 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2459 struct ahd_tmode_tstate *tstate;
2460 struct ahd_initiator_tinfo *tinfo
2461 = ahd_fetch_transinfo(ahd,
2462 starget->channel + 'A',
2463 shost->this_id, starget->id, &tstate);
2464 struct ahd_devinfo devinfo;
2465 unsigned int ppr_options = tinfo->goal.ppr_options
2466 & ~MSG_EXT_PPR_DT_REQ;
2467 unsigned int period = tinfo->goal.period;
2468 unsigned int width = tinfo->goal.width;
2469 unsigned long flags;
2472 if ((ahd_debug & AHD_SHOW_DV) != 0)
2473 printk("%s: %s DT\n", ahd_name(ahd),
2474 dt ? "enabling" : "disabling");
2476 if (dt && spi_max_width(starget)) {
2477 ppr_options |= MSG_EXT_PPR_DT_REQ;
2479 ahd_linux_set_width(starget, 1);
2482 period = 10; /* If resetting DT, period must be >= 25ns */
2483 /* IU is invalid without DT set */
2484 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2486 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2487 starget->channel + 'A', ROLE_INITIATOR);
2488 ahd_find_syncrate(ahd, &period, &ppr_options,
2489 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2491 ahd_lock(ahd, &flags);
2492 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2493 ppr_options, AHD_TRANS_GOAL, FALSE);
2494 ahd_unlock(ahd, &flags);
2497 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2499 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2500 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2501 struct ahd_tmode_tstate *tstate;
2502 struct ahd_initiator_tinfo *tinfo
2503 = ahd_fetch_transinfo(ahd,
2504 starget->channel + 'A',
2505 shost->this_id, starget->id, &tstate);
2506 struct ahd_devinfo devinfo;
2507 unsigned int ppr_options = tinfo->goal.ppr_options
2508 & ~MSG_EXT_PPR_QAS_REQ;
2509 unsigned int period = tinfo->goal.period;
2511 unsigned long flags;
2514 if ((ahd_debug & AHD_SHOW_DV) != 0)
2515 printk("%s: %s QAS\n", ahd_name(ahd),
2516 qas ? "enabling" : "disabling");
2520 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2523 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2525 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2526 starget->channel + 'A', ROLE_INITIATOR);
2527 ahd_find_syncrate(ahd, &period, &ppr_options,
2528 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2530 ahd_lock(ahd, &flags);
2531 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2532 ppr_options, AHD_TRANS_GOAL, FALSE);
2533 ahd_unlock(ahd, &flags);
2536 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2538 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2539 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2540 struct ahd_tmode_tstate *tstate;
2541 struct ahd_initiator_tinfo *tinfo
2542 = ahd_fetch_transinfo(ahd,
2543 starget->channel + 'A',
2544 shost->this_id, starget->id, &tstate);
2545 struct ahd_devinfo devinfo;
2546 unsigned int ppr_options = tinfo->goal.ppr_options
2547 & ~MSG_EXT_PPR_IU_REQ;
2548 unsigned int period = tinfo->goal.period;
2550 unsigned long flags;
2553 if ((ahd_debug & AHD_SHOW_DV) != 0)
2554 printk("%s: %s IU\n", ahd_name(ahd),
2555 iu ? "enabling" : "disabling");
2558 if (iu && spi_max_width(starget)) {
2559 ppr_options |= MSG_EXT_PPR_IU_REQ;
2560 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2563 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2565 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2566 starget->channel + 'A', ROLE_INITIATOR);
2567 ahd_find_syncrate(ahd, &period, &ppr_options,
2568 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2570 ahd_lock(ahd, &flags);
2571 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2572 ppr_options, AHD_TRANS_GOAL, FALSE);
2573 ahd_unlock(ahd, &flags);
2576 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2578 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2579 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2580 struct ahd_tmode_tstate *tstate;
2581 struct ahd_initiator_tinfo *tinfo
2582 = ahd_fetch_transinfo(ahd,
2583 starget->channel + 'A',
2584 shost->this_id, starget->id, &tstate);
2585 struct ahd_devinfo devinfo;
2586 unsigned int ppr_options = tinfo->goal.ppr_options
2587 & ~MSG_EXT_PPR_RD_STRM;
2588 unsigned int period = tinfo->goal.period;
2589 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2590 unsigned long flags;
2593 if ((ahd_debug & AHD_SHOW_DV) != 0)
2594 printk("%s: %s Read Streaming\n", ahd_name(ahd),
2595 rdstrm ? "enabling" : "disabling");
2598 if (rdstrm && spi_max_width(starget))
2599 ppr_options |= MSG_EXT_PPR_RD_STRM;
2601 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2602 starget->channel + 'A', ROLE_INITIATOR);
2603 ahd_find_syncrate(ahd, &period, &ppr_options,
2604 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2606 ahd_lock(ahd, &flags);
2607 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2608 ppr_options, AHD_TRANS_GOAL, FALSE);
2609 ahd_unlock(ahd, &flags);
2612 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2614 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2615 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2616 struct ahd_tmode_tstate *tstate;
2617 struct ahd_initiator_tinfo *tinfo
2618 = ahd_fetch_transinfo(ahd,
2619 starget->channel + 'A',
2620 shost->this_id, starget->id, &tstate);
2621 struct ahd_devinfo devinfo;
2622 unsigned int ppr_options = tinfo->goal.ppr_options
2623 & ~MSG_EXT_PPR_WR_FLOW;
2624 unsigned int period = tinfo->goal.period;
2625 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2626 unsigned long flags;
2629 if ((ahd_debug & AHD_SHOW_DV) != 0)
2630 printk("%s: %s Write Flow Control\n", ahd_name(ahd),
2631 wrflow ? "enabling" : "disabling");
2634 if (wrflow && spi_max_width(starget))
2635 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2637 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2638 starget->channel + 'A', ROLE_INITIATOR);
2639 ahd_find_syncrate(ahd, &period, &ppr_options,
2640 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2642 ahd_lock(ahd, &flags);
2643 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2644 ppr_options, AHD_TRANS_GOAL, FALSE);
2645 ahd_unlock(ahd, &flags);
2648 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2650 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2651 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2652 struct ahd_tmode_tstate *tstate;
2653 struct ahd_initiator_tinfo *tinfo
2654 = ahd_fetch_transinfo(ahd,
2655 starget->channel + 'A',
2656 shost->this_id, starget->id, &tstate);
2657 struct ahd_devinfo devinfo;
2658 unsigned int ppr_options = tinfo->goal.ppr_options
2660 unsigned int period = tinfo->goal.period;
2661 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2662 unsigned long flags;
2664 if ((ahd->features & AHD_RTI) == 0) {
2666 if ((ahd_debug & AHD_SHOW_DV) != 0)
2667 printk("%s: RTI not available\n", ahd_name(ahd));
2673 if ((ahd_debug & AHD_SHOW_DV) != 0)
2674 printk("%s: %s RTI\n", ahd_name(ahd),
2675 rti ? "enabling" : "disabling");
2678 if (rti && spi_max_width(starget))
2679 ppr_options |= MSG_EXT_PPR_RTI;
2681 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2682 starget->channel + 'A', ROLE_INITIATOR);
2683 ahd_find_syncrate(ahd, &period, &ppr_options,
2684 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2686 ahd_lock(ahd, &flags);
2687 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2688 ppr_options, AHD_TRANS_GOAL, FALSE);
2689 ahd_unlock(ahd, &flags);
2692 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2694 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2695 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2696 struct ahd_tmode_tstate *tstate;
2697 struct ahd_initiator_tinfo *tinfo
2698 = ahd_fetch_transinfo(ahd,
2699 starget->channel + 'A',
2700 shost->this_id, starget->id, &tstate);
2701 struct ahd_devinfo devinfo;
2702 unsigned int ppr_options = tinfo->goal.ppr_options
2703 & ~MSG_EXT_PPR_PCOMP_EN;
2704 unsigned int period = tinfo->goal.period;
2705 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2706 unsigned long flags;
2709 if ((ahd_debug & AHD_SHOW_DV) != 0)
2710 printk("%s: %s Precompensation\n", ahd_name(ahd),
2711 pcomp ? "Enable" : "Disable");
2714 if (pcomp && spi_max_width(starget)) {
2717 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2718 const struct ahd_linux_iocell_opts *iocell_opts;
2720 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2721 precomp = iocell_opts->precomp;
2723 precomp = AIC79XX_DEFAULT_PRECOMP;
2725 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2726 AHD_SET_PRECOMP(ahd, precomp);
2728 AHD_SET_PRECOMP(ahd, 0);
2731 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2732 starget->channel + 'A', ROLE_INITIATOR);
2733 ahd_find_syncrate(ahd, &period, &ppr_options,
2734 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2736 ahd_lock(ahd, &flags);
2737 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2738 ppr_options, AHD_TRANS_GOAL, FALSE);
2739 ahd_unlock(ahd, &flags);
2742 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2744 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2745 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2746 struct ahd_tmode_tstate *tstate;
2747 struct ahd_initiator_tinfo *tinfo
2748 = ahd_fetch_transinfo(ahd,
2749 starget->channel + 'A',
2750 shost->this_id, starget->id, &tstate);
2751 struct ahd_devinfo devinfo;
2752 unsigned int ppr_options = tinfo->goal.ppr_options
2753 & ~MSG_EXT_PPR_HOLD_MCS;
2754 unsigned int period = tinfo->goal.period;
2755 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2756 unsigned long flags;
2758 if (hold && spi_max_width(starget))
2759 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2761 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2762 starget->channel + 'A', ROLE_INITIATOR);
2763 ahd_find_syncrate(ahd, &period, &ppr_options,
2764 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2766 ahd_lock(ahd, &flags);
2767 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2768 ppr_options, AHD_TRANS_GOAL, FALSE);
2769 ahd_unlock(ahd, &flags);
2772 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2774 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2775 unsigned long flags;
2778 ahd_lock(ahd, &flags);
2780 mode = ahd_inb(ahd, SBLKCTL);
2782 ahd_unlock(ahd, &flags);
2785 spi_signalling(shost) = SPI_SIGNAL_LVD;
2786 else if (mode & ENAB20)
2787 spi_signalling(shost) = SPI_SIGNAL_SE;
2789 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2792 static struct spi_function_template ahd_linux_transport_functions = {
2793 .set_offset = ahd_linux_set_offset,
2795 .set_period = ahd_linux_set_period,
2797 .set_width = ahd_linux_set_width,
2799 .set_dt = ahd_linux_set_dt,
2801 .set_iu = ahd_linux_set_iu,
2803 .set_qas = ahd_linux_set_qas,
2805 .set_rd_strm = ahd_linux_set_rd_strm,
2807 .set_wr_flow = ahd_linux_set_wr_flow,
2809 .set_rti = ahd_linux_set_rti,
2811 .set_pcomp_en = ahd_linux_set_pcomp_en,
2813 .set_hold_mcs = ahd_linux_set_hold_mcs,
2815 .get_signalling = ahd_linux_get_signalling,
2819 ahd_linux_init(void)
2824 * If we've been passed any parameters, process them now.
2827 aic79xx_setup(aic79xx);
2829 ahd_linux_transport_template =
2830 spi_attach_transport(&ahd_linux_transport_functions);
2831 if (!ahd_linux_transport_template)
2834 scsi_transport_reserve_device(ahd_linux_transport_template,
2835 sizeof(struct ahd_linux_device));
2837 error = ahd_linux_pci_init();
2839 spi_release_transport(ahd_linux_transport_template);
2844 ahd_linux_exit(void)
2846 ahd_linux_pci_exit();
2847 spi_release_transport(ahd_linux_transport_template);
2850 module_init(ahd_linux_init);
2851 module_exit(ahd_linux_exit);