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.
576 ahd_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
578 struct ahd_softc *ahd;
579 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
580 int rtn = SCSI_MLQUEUE_HOST_BUSY;
582 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
584 cmd->scsi_done = scsi_done;
585 cmd->result = CAM_REQ_INPROG << 16;
586 rtn = ahd_linux_run_command(ahd, dev, cmd);
591 static DEF_SCSI_QCMD(ahd_linux_queue)
593 static struct scsi_target **
594 ahd_linux_target_in_softc(struct scsi_target *starget)
596 struct ahd_softc *ahd =
597 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
598 unsigned int target_offset;
600 target_offset = starget->id;
601 if (starget->channel != 0)
604 return &ahd->platform_data->starget[target_offset];
608 ahd_linux_target_alloc(struct scsi_target *starget)
610 struct ahd_softc *ahd =
611 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
612 struct seeprom_config *sc = ahd->seep_config;
614 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
615 struct ahd_devinfo devinfo;
616 struct ahd_initiator_tinfo *tinfo;
617 struct ahd_tmode_tstate *tstate;
618 char channel = starget->channel + 'A';
620 ahd_lock(ahd, &flags);
622 BUG_ON(*ahd_targp != NULL);
624 *ahd_targp = starget;
627 int flags = sc->device_flags[starget->id];
629 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
630 starget->id, &tstate);
632 if ((flags & CFPACKETIZED) == 0) {
633 /* don't negotiate packetized (IU) transfers */
634 spi_max_iu(starget) = 0;
636 if ((ahd->features & AHD_RTI) == 0)
637 spi_rti(starget) = 0;
640 if ((flags & CFQAS) == 0)
641 spi_max_qas(starget) = 0;
643 /* Transinfo values have been set to BIOS settings */
644 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
645 spi_min_period(starget) = tinfo->user.period;
646 spi_max_offset(starget) = tinfo->user.offset;
649 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
650 starget->id, &tstate);
651 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
652 CAM_LUN_WILDCARD, channel,
654 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
655 AHD_TRANS_GOAL, /*paused*/FALSE);
656 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
657 AHD_TRANS_GOAL, /*paused*/FALSE);
658 ahd_unlock(ahd, &flags);
664 ahd_linux_target_destroy(struct scsi_target *starget)
666 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
672 ahd_linux_slave_alloc(struct scsi_device *sdev)
674 struct ahd_softc *ahd =
675 *((struct ahd_softc **)sdev->host->hostdata);
676 struct ahd_linux_device *dev;
679 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
681 dev = scsi_transport_device_data(sdev);
682 memset(dev, 0, sizeof(*dev));
685 * We start out life using untagged
686 * transactions of which we allow one.
691 * Set maxtags to 0. This will be changed if we
692 * later determine that we are dealing with
693 * a tagged queuing capable device.
701 ahd_linux_slave_configure(struct scsi_device *sdev)
704 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
706 ahd_linux_device_queue_depth(sdev);
708 /* Initial Domain Validation */
709 if (!spi_initial_dv(sdev->sdev_target))
715 #if defined(__i386__)
717 * Return the disk geometry for the given SCSI device.
720 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
721 sector_t capacity, int geom[])
727 struct ahd_softc *ahd;
729 ahd = *((struct ahd_softc **)sdev->host->hostdata);
731 if (scsi_partsize(bdev, capacity, geom))
736 cylinders = aic_sector_div(capacity, heads, sectors);
738 if (aic79xx_extended != 0)
741 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
742 if (extended && cylinders >= 1024) {
745 cylinders = aic_sector_div(capacity, heads, sectors);
755 * Abort the current SCSI command(s).
758 ahd_linux_abort(struct scsi_cmnd *cmd)
762 error = ahd_linux_queue_abort_cmd(cmd);
768 * Attempt to send a target reset message to the device that timed out.
771 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
773 struct ahd_softc *ahd;
774 struct ahd_linux_device *dev;
775 struct scb *reset_scb;
777 int retval = SUCCESS;
778 struct ahd_initiator_tinfo *tinfo;
779 struct ahd_tmode_tstate *tstate;
781 DECLARE_COMPLETION_ONSTACK(done);
785 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
787 scmd_printk(KERN_INFO, cmd,
788 "Attempting to queue a TARGET RESET message:");
791 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
792 printk(" 0x%x", cmd->cmnd[cdb_byte]);
796 * Determine if we currently own this command.
798 dev = scsi_transport_device_data(cmd->device);
802 * No target device for this command exists,
803 * so we must not still own the command.
805 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
810 * Generate us a new SCB
812 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
814 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
818 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
819 cmd->device->id, &tstate);
820 reset_scb->io_ctx = cmd;
821 reset_scb->platform_data->dev = dev;
822 reset_scb->sg_count = 0;
823 ahd_set_residual(reset_scb, 0);
824 ahd_set_sense_residual(reset_scb, 0);
825 reset_scb->platform_data->xfer_len = 0;
826 reset_scb->hscb->control = 0;
827 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
828 reset_scb->hscb->lun = cmd->device->lun;
829 reset_scb->hscb->cdb_len = 0;
830 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
831 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
832 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
833 reset_scb->flags |= SCB_PACKETIZED;
835 reset_scb->hscb->control |= MK_MESSAGE;
839 dev->commands_issued++;
841 ahd_lock(ahd, &flags);
843 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
844 ahd_queue_scb(ahd, reset_scb);
846 ahd->platform_data->eh_done = &done;
847 ahd_unlock(ahd, &flags);
849 printk("%s: Device reset code sleeping\n", ahd_name(ahd));
850 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
851 ahd_lock(ahd, &flags);
852 ahd->platform_data->eh_done = NULL;
853 ahd_unlock(ahd, &flags);
854 printk("%s: Device reset timer expired (active %d)\n",
855 ahd_name(ahd), dev->active);
858 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
864 * Reset the SCSI bus.
867 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
869 struct ahd_softc *ahd;
873 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
875 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
876 printk("%s: Bus reset called for cmd %p\n",
879 ahd_lock(ahd, &flags);
881 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
882 /*initiate reset*/TRUE);
883 ahd_unlock(ahd, &flags);
886 printk("%s: SCSI bus reset delivered. "
887 "%d SCBs aborted.\n", ahd_name(ahd), found);
892 struct scsi_host_template aic79xx_driver_template = {
893 .module = THIS_MODULE,
895 .proc_name = "aic79xx",
896 .show_info = ahd_linux_show_info,
897 .write_info = ahd_proc_write_seeprom,
898 .info = ahd_linux_info,
899 .queuecommand = ahd_linux_queue,
900 .eh_abort_handler = ahd_linux_abort,
901 .eh_device_reset_handler = ahd_linux_dev_reset,
902 .eh_bus_reset_handler = ahd_linux_bus_reset,
903 #if defined(__i386__)
904 .bios_param = ahd_linux_biosparam,
906 .can_queue = AHD_MAX_QUEUE,
910 .slave_alloc = ahd_linux_slave_alloc,
911 .slave_configure = ahd_linux_slave_configure,
912 .target_alloc = ahd_linux_target_alloc,
913 .target_destroy = ahd_linux_target_destroy,
916 /******************************** Bus DMA *************************************/
918 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
919 bus_size_t alignment, bus_size_t boundary,
920 dma_addr_t lowaddr, dma_addr_t highaddr,
921 bus_dma_filter_t *filter, void *filterarg,
922 bus_size_t maxsize, int nsegments,
923 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
927 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC);
932 * Linux is very simplistic about DMA memory. For now don't
933 * maintain all specification information. Once Linux supplies
934 * better facilities for doing these operations, or the
935 * needs of this particular driver change, we might need to do
938 dmat->alignment = alignment;
939 dmat->boundary = boundary;
940 dmat->maxsize = maxsize;
946 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
952 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
953 int flags, bus_dmamap_t *mapp)
955 *vaddr = pci_alloc_consistent(ahd->dev_softc,
956 dmat->maxsize, mapp);
963 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
964 void* vaddr, bus_dmamap_t map)
966 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
971 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
972 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
973 void *cb_arg, int flags)
976 * Assume for now that this will only be used during
977 * initialization and not for per-transaction buffer mapping.
979 bus_dma_segment_t stack_sg;
981 stack_sg.ds_addr = map;
982 stack_sg.ds_len = dmat->maxsize;
983 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
988 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
993 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
999 /********************* Platform Dependent Functions ***************************/
1001 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
1005 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
1006 uint8_t *iocell_info;
1008 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
1009 iocell_info[index] = value & 0xFFFF;
1011 printk("iocell[%d:%ld] = %d\n", instance, index, value);
1016 ahd_linux_setup_tag_info_global(char *p)
1020 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
1021 printk("Setting Global Tags= %d\n", tags);
1023 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
1024 for (j = 0; j < AHD_NUM_TARGETS; j++) {
1025 aic79xx_tag_info[i].tag_commands[j] = tags;
1031 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
1034 if ((instance >= 0) && (targ >= 0)
1035 && (instance < ARRAY_SIZE(aic79xx_tag_info))
1036 && (targ < AHD_NUM_TARGETS)) {
1037 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
1039 printk("tag_info[%d:%d] = %d\n", instance, targ, value);
1044 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
1045 void (*callback)(u_long, int, int, int32_t),
1046 u_long callback_arg)
1054 char tok_list[] = {'.', ',', '{', '}', '\0'};
1056 /* All options use a ':' name/arg separator */
1057 if (*opt_arg != ':')
1064 * Restore separator that may be in
1065 * the middle of our option argument.
1067 tok_end = strchr(opt_arg, '\0');
1073 if (instance == -1) {
1080 printk("Malformed Option %s\n",
1090 else if (instance != -1)
1100 else if (instance >= 0)
1109 for (i = 0; tok_list[i]; i++) {
1110 tok_end2 = strchr(opt_arg, tok_list[i]);
1111 if ((tok_end2) && (tok_end2 < tok_end))
1114 callback(callback_arg, instance, targ,
1115 simple_strtol(opt_arg, NULL, 0));
1124 * Handle Linux boot parameters. This routine allows for assigning a value
1125 * to a parameter with a ':' between the parameter and the value.
1126 * ie. aic79xx=stpwlev:1,extended
1129 aic79xx_setup(char *s)
1135 static const struct {
1139 { "extended", &aic79xx_extended },
1140 { "no_reset", &aic79xx_no_reset },
1141 { "verbose", &aic79xx_verbose },
1142 { "allow_memio", &aic79xx_allow_memio},
1144 { "debug", &ahd_debug },
1146 { "periodic_otag", &aic79xx_periodic_otag },
1147 { "pci_parity", &aic79xx_pci_parity },
1148 { "seltime", &aic79xx_seltime },
1149 { "tag_info", NULL },
1150 { "global_tag_depth", NULL},
1151 { "slewrate", NULL },
1152 { "precomp", NULL },
1153 { "amplitude", NULL },
1154 { "slowcrc", &aic79xx_slowcrc },
1157 end = strchr(s, '\0');
1160 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1161 * will never be 0 in this case.
1165 while ((p = strsep(&s, ",.")) != NULL) {
1168 for (i = 0; i < ARRAY_SIZE(options); i++) {
1170 n = strlen(options[i].name);
1171 if (strncmp(options[i].name, p, n) == 0)
1174 if (i == ARRAY_SIZE(options))
1177 if (strncmp(p, "global_tag_depth", n) == 0) {
1178 ahd_linux_setup_tag_info_global(p + n);
1179 } else if (strncmp(p, "tag_info", n) == 0) {
1180 s = ahd_parse_brace_option("tag_info", p + n, end,
1181 2, ahd_linux_setup_tag_info, 0);
1182 } else if (strncmp(p, "slewrate", n) == 0) {
1183 s = ahd_parse_brace_option("slewrate",
1184 p + n, end, 1, ahd_linux_setup_iocell_info,
1185 AIC79XX_SLEWRATE_INDEX);
1186 } else if (strncmp(p, "precomp", n) == 0) {
1187 s = ahd_parse_brace_option("precomp",
1188 p + n, end, 1, ahd_linux_setup_iocell_info,
1189 AIC79XX_PRECOMP_INDEX);
1190 } else if (strncmp(p, "amplitude", n) == 0) {
1191 s = ahd_parse_brace_option("amplitude",
1192 p + n, end, 1, ahd_linux_setup_iocell_info,
1193 AIC79XX_AMPLITUDE_INDEX);
1194 } else if (p[n] == ':') {
1195 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1196 } else if (!strncmp(p, "verbose", n)) {
1197 *(options[i].flag) = 1;
1199 *(options[i].flag) ^= 0xFFFFFFFF;
1205 __setup("aic79xx=", aic79xx_setup);
1207 uint32_t aic79xx_verbose;
1210 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1213 struct Scsi_Host *host;
1218 template->name = ahd->description;
1219 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1223 *((struct ahd_softc **)host->hostdata) = ahd;
1224 ahd->platform_data->host = host;
1225 host->can_queue = AHD_MAX_QUEUE;
1226 host->cmd_per_lun = 2;
1227 host->sg_tablesize = AHD_NSEG;
1228 host->this_id = ahd->our_id;
1229 host->irq = ahd->platform_data->irq;
1230 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1231 host->max_lun = AHD_NUM_LUNS;
1232 host->max_channel = 0;
1233 host->sg_tablesize = AHD_NSEG;
1235 ahd_set_unit(ahd, ahd_linux_unit++);
1236 ahd_unlock(ahd, &s);
1237 sprintf(buf, "scsi%d", host->host_no);
1238 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC);
1239 if (new_name != NULL) {
1240 strcpy(new_name, buf);
1241 ahd_set_name(ahd, new_name);
1243 host->unique_id = ahd->unit;
1244 ahd_linux_initialize_scsi_bus(ahd);
1245 ahd_intr_enable(ahd, TRUE);
1247 host->transportt = ahd_linux_transport_template;
1249 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1251 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1252 scsi_host_put(host);
1256 scsi_scan_host(host);
1261 * Place the SCSI bus into a known state by either resetting it,
1262 * or forcing transfer negotiations on the next command to any
1266 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1275 if (aic79xx_no_reset != 0)
1276 ahd->flags &= ~AHD_RESET_BUS_A;
1278 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1279 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1281 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1286 * Force negotiation to async for all targets that
1287 * will not see an initial bus reset.
1289 for (; target_id < numtarg; target_id++) {
1290 struct ahd_devinfo devinfo;
1291 struct ahd_initiator_tinfo *tinfo;
1292 struct ahd_tmode_tstate *tstate;
1294 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1295 target_id, &tstate);
1296 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1297 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1298 ahd_update_neg_request(ahd, &devinfo, tstate,
1299 tinfo, AHD_NEG_ALWAYS);
1301 ahd_unlock(ahd, &s);
1302 /* Give the bus some time to recover */
1303 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1304 ahd_freeze_simq(ahd);
1305 msleep(AIC79XX_RESET_DELAY);
1306 ahd_release_simq(ahd);
1311 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1313 ahd->platform_data =
1314 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC);
1315 if (ahd->platform_data == NULL)
1317 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1319 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1324 ahd_platform_free(struct ahd_softc *ahd)
1326 struct scsi_target *starget;
1329 if (ahd->platform_data != NULL) {
1330 /* destroy all of the device and target objects */
1331 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1332 starget = ahd->platform_data->starget[i];
1333 if (starget != NULL) {
1334 ahd->platform_data->starget[i] = NULL;
1338 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1339 free_irq(ahd->platform_data->irq, ahd);
1340 if (ahd->tags[0] == BUS_SPACE_PIO
1341 && ahd->bshs[0].ioport != 0)
1342 release_region(ahd->bshs[0].ioport, 256);
1343 if (ahd->tags[1] == BUS_SPACE_PIO
1344 && ahd->bshs[1].ioport != 0)
1345 release_region(ahd->bshs[1].ioport, 256);
1346 if (ahd->tags[0] == BUS_SPACE_MEMIO
1347 && ahd->bshs[0].maddr != NULL) {
1348 iounmap(ahd->bshs[0].maddr);
1349 release_mem_region(ahd->platform_data->mem_busaddr,
1352 if (ahd->platform_data->host)
1353 scsi_host_put(ahd->platform_data->host);
1355 kfree(ahd->platform_data);
1360 ahd_platform_init(struct ahd_softc *ahd)
1363 * Lookup and commit any modified IO Cell options.
1365 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1366 const struct ahd_linux_iocell_opts *iocell_opts;
1368 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1369 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1370 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1371 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1372 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1373 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1374 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1380 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1382 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1383 SCB_GET_CHANNEL(ahd, scb),
1384 SCB_GET_LUN(scb), SCB_LIST_NULL,
1385 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1389 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1390 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1392 struct ahd_linux_device *dev;
1399 dev = scsi_transport_device_data(sdev);
1403 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1406 case AHD_QUEUE_NONE:
1409 case AHD_QUEUE_BASIC:
1410 now_queuing = AHD_DEV_Q_BASIC;
1412 case AHD_QUEUE_TAGGED:
1413 now_queuing = AHD_DEV_Q_TAGGED;
1416 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1417 && (was_queuing != now_queuing)
1418 && (dev->active != 0)) {
1419 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1423 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1427 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1430 * Start out aggressively and allow our
1431 * dynamic queue depth algorithm to take
1434 dev->maxtags = usertags;
1435 dev->openings = dev->maxtags - dev->active;
1437 if (dev->maxtags == 0) {
1439 * Queueing is disabled by the user.
1442 } else if (alg == AHD_QUEUE_TAGGED) {
1443 dev->flags |= AHD_DEV_Q_TAGGED;
1444 if (aic79xx_periodic_otag != 0)
1445 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1447 dev->flags |= AHD_DEV_Q_BASIC;
1449 /* We can only have one opening. */
1451 dev->openings = 1 - dev->active;
1454 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1455 case AHD_DEV_Q_BASIC:
1456 case AHD_DEV_Q_TAGGED:
1457 scsi_change_queue_depth(sdev,
1458 dev->openings + dev->active);
1462 * We allow the OS to queue 2 untagged transactions to
1463 * us at any time even though we can only execute them
1464 * serially on the controller/device. This should
1465 * remove some latency.
1467 scsi_change_queue_depth(sdev, 1);
1473 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1474 int lun, u_int tag, role_t role, uint32_t status)
1480 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1482 static int warned_user;
1486 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1487 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1489 if (warned_user == 0) {
1491 "aic79xx: WARNING: Insufficient tag_info instances\n"
1492 "aic79xx: for installed controllers. Using defaults\n"
1493 "aic79xx: Please update the aic79xx_tag_info array in\n"
1494 "aic79xx: the aic79xx_osm.c source file.\n");
1497 tags = AHD_MAX_QUEUE;
1499 adapter_tag_info_t *tag_info;
1501 tag_info = &aic79xx_tag_info[ahd->unit];
1502 tags = tag_info->tag_commands[devinfo->target_offset];
1503 if (tags > AHD_MAX_QUEUE)
1504 tags = AHD_MAX_QUEUE;
1511 * Determines the queue depth for a given device.
1514 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1516 struct ahd_devinfo devinfo;
1518 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1520 ahd_compile_devinfo(&devinfo,
1522 sdev->sdev_target->id, sdev->lun,
1523 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1525 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1526 if (tags != 0 && sdev->tagged_supported != 0) {
1528 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1529 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1530 devinfo.lun, AC_TRANSFER_NEG);
1531 ahd_print_devinfo(ahd, &devinfo);
1532 printk("Tagged Queuing enabled. Depth %d\n", tags);
1534 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1535 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1536 devinfo.lun, AC_TRANSFER_NEG);
1541 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1542 struct scsi_cmnd *cmd)
1545 struct hardware_scb *hscb;
1546 struct ahd_initiator_tinfo *tinfo;
1547 struct ahd_tmode_tstate *tstate;
1550 unsigned long flags;
1553 nseg = scsi_dma_map(cmd);
1555 return SCSI_MLQUEUE_HOST_BUSY;
1557 ahd_lock(ahd, &flags);
1560 * Get an scb to use.
1562 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1563 cmd->device->id, &tstate);
1564 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1565 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1566 col_idx = AHD_NEVER_COL_IDX;
1568 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1571 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1572 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1573 ahd_unlock(ahd, &flags);
1574 scsi_dma_unmap(cmd);
1575 return SCSI_MLQUEUE_HOST_BUSY;
1579 scb->platform_data->dev = dev;
1581 cmd->host_scribble = (char *)scb;
1584 * Fill out basics of the HSCB.
1587 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1588 hscb->lun = cmd->device->lun;
1589 scb->hscb->task_management = 0;
1590 mask = SCB_GET_TARGET_MASK(ahd, scb);
1592 if ((ahd->user_discenable & mask) != 0)
1593 hscb->control |= DISCENB;
1595 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1596 scb->flags |= SCB_PACKETIZED;
1598 if ((tstate->auto_negotiate & mask) != 0) {
1599 scb->flags |= SCB_AUTO_NEGOTIATE;
1600 scb->hscb->control |= MK_MESSAGE;
1603 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1604 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1605 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1606 hscb->control |= MSG_ORDERED_TASK;
1607 dev->commands_since_idle_or_otag = 0;
1609 hscb->control |= MSG_SIMPLE_TASK;
1613 hscb->cdb_len = cmd->cmd_len;
1614 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1616 scb->platform_data->xfer_len = 0;
1617 ahd_set_residual(scb, 0);
1618 ahd_set_sense_residual(scb, 0);
1622 void *sg = scb->sg_list;
1623 struct scatterlist *cur_seg;
1626 scb->platform_data->xfer_len = 0;
1628 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1632 addr = sg_dma_address(cur_seg);
1633 len = sg_dma_len(cur_seg);
1634 scb->platform_data->xfer_len += len;
1635 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1640 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1643 dev->commands_issued++;
1645 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1646 dev->commands_since_idle_or_otag++;
1647 scb->flags |= SCB_ACTIVE;
1648 ahd_queue_scb(ahd, scb);
1650 ahd_unlock(ahd, &flags);
1656 * SCSI controller interrupt handler.
1659 ahd_linux_isr(int irq, void *dev_id)
1661 struct ahd_softc *ahd;
1665 ahd = (struct ahd_softc *) dev_id;
1666 ahd_lock(ahd, &flags);
1667 ours = ahd_intr(ahd);
1668 ahd_unlock(ahd, &flags);
1669 return IRQ_RETVAL(ours);
1673 ahd_send_async(struct ahd_softc *ahd, char channel,
1674 u_int target, u_int lun, ac_code code)
1677 case AC_TRANSFER_NEG:
1679 struct scsi_target *starget;
1680 struct ahd_initiator_tinfo *tinfo;
1681 struct ahd_tmode_tstate *tstate;
1682 unsigned int target_ppr_options;
1684 BUG_ON(target == CAM_TARGET_WILDCARD);
1686 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1690 * Don't bother reporting results while
1691 * negotiations are still pending.
1693 if (tinfo->curr.period != tinfo->goal.period
1694 || tinfo->curr.width != tinfo->goal.width
1695 || tinfo->curr.offset != tinfo->goal.offset
1696 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1697 if (bootverbose == 0)
1701 * Don't bother reporting results that
1702 * are identical to those last reported.
1704 starget = ahd->platform_data->starget[target];
1705 if (starget == NULL)
1708 target_ppr_options =
1709 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1710 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1711 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1712 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1713 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1714 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1715 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1716 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1718 if (tinfo->curr.period == spi_period(starget)
1719 && tinfo->curr.width == spi_width(starget)
1720 && tinfo->curr.offset == spi_offset(starget)
1721 && tinfo->curr.ppr_options == target_ppr_options)
1722 if (bootverbose == 0)
1725 spi_period(starget) = tinfo->curr.period;
1726 spi_width(starget) = tinfo->curr.width;
1727 spi_offset(starget) = tinfo->curr.offset;
1728 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1729 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1730 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1731 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1732 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1733 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1734 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1735 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1736 spi_display_xfer_agreement(starget);
1741 WARN_ON(lun != CAM_LUN_WILDCARD);
1742 scsi_report_device_reset(ahd->platform_data->host,
1743 channel - 'A', target);
1747 if (ahd->platform_data->host != NULL) {
1748 scsi_report_bus_reset(ahd->platform_data->host,
1753 panic("ahd_send_async: Unexpected async event");
1758 * Calls the higher level scsi done function and frees the scb.
1761 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1763 struct scsi_cmnd *cmd;
1764 struct ahd_linux_device *dev;
1766 if ((scb->flags & SCB_ACTIVE) == 0) {
1767 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1768 ahd_dump_card_state(ahd);
1769 panic("Stopping for safety");
1771 LIST_REMOVE(scb, pending_links);
1773 dev = scb->platform_data->dev;
1776 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1777 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1780 ahd_linux_unmap_scb(ahd, scb);
1783 * Guard against stale sense data.
1784 * The Linux mid-layer assumes that sense
1785 * was retrieved anytime the first byte of
1786 * the sense buffer looks "sane".
1788 cmd->sense_buffer[0] = 0;
1789 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1790 #ifdef AHD_REPORT_UNDERFLOWS
1791 uint32_t amount_xferred;
1794 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1796 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1798 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1799 ahd_print_path(ahd, scb);
1800 printk("Set CAM_UNCOR_PARITY\n");
1803 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1804 #ifdef AHD_REPORT_UNDERFLOWS
1806 * This code is disabled by default as some
1807 * clients of the SCSI system do not properly
1808 * initialize the underflow parameter. This
1809 * results in spurious termination of commands
1810 * that complete as expected (e.g. underflow is
1811 * allowed as command can return variable amounts
1814 } else if (amount_xferred < scb->io_ctx->underflow) {
1817 ahd_print_path(ahd, scb);
1819 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1820 printk(" 0x%x", scb->io_ctx->cmnd[i]);
1822 ahd_print_path(ahd, scb);
1823 printk("Saw underflow (%ld of %ld bytes). "
1824 "Treated as error\n",
1825 ahd_get_residual(scb),
1826 ahd_get_transfer_length(scb));
1827 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1830 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1832 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1833 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1836 if (dev->openings == 1
1837 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1838 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1839 dev->tag_success_count++;
1841 * Some devices deal with temporary internal resource
1842 * shortages by returning queue full. When the queue
1843 * full occurrs, we throttle back. Slowly try to get
1844 * back to our previous queue depth.
1846 if ((dev->openings + dev->active) < dev->maxtags
1847 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1848 dev->tag_success_count = 0;
1852 if (dev->active == 0)
1853 dev->commands_since_idle_or_otag = 0;
1855 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1856 printk("Recovery SCB completes\n");
1857 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1858 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1859 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1861 if (ahd->platform_data->eh_done)
1862 complete(ahd->platform_data->eh_done);
1865 ahd_free_scb(ahd, scb);
1866 ahd_linux_queue_cmd_complete(ahd, cmd);
1870 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1871 struct scsi_device *sdev, struct scb *scb)
1873 struct ahd_devinfo devinfo;
1874 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1876 ahd_compile_devinfo(&devinfo,
1878 sdev->sdev_target->id, sdev->lun,
1879 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1883 * We don't currently trust the mid-layer to
1884 * properly deal with queue full or busy. So,
1885 * when one occurs, we tell the mid-layer to
1886 * unconditionally requeue the command to us
1887 * so that we can retry it ourselves. We also
1888 * implement our own throttling mechanism so
1889 * we don't clobber the device with too many
1892 switch (ahd_get_scsi_status(scb)) {
1895 case SCSI_STATUS_CHECK_COND:
1896 case SCSI_STATUS_CMD_TERMINATED:
1898 struct scsi_cmnd *cmd;
1901 * Copy sense information to the OS's cmd
1902 * structure if it is available.
1905 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1906 struct scsi_status_iu_header *siu;
1910 if (scb->flags & SCB_SENSE) {
1911 sense_size = min(sizeof(struct scsi_sense_data)
1912 - ahd_get_sense_residual(scb),
1913 (u_long)SCSI_SENSE_BUFFERSIZE);
1917 * Copy only the sense data into the provided
1920 siu = (struct scsi_status_iu_header *)
1922 sense_size = min_t(size_t,
1923 scsi_4btoul(siu->sense_length),
1924 SCSI_SENSE_BUFFERSIZE);
1925 sense_offset = SIU_SENSE_OFFSET(siu);
1928 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1929 memcpy(cmd->sense_buffer,
1930 ahd_get_sense_buf(ahd, scb)
1931 + sense_offset, sense_size);
1932 cmd->result |= (DRIVER_SENSE << 24);
1935 if (ahd_debug & AHD_SHOW_SENSE) {
1938 printk("Copied %d bytes of sense data at %d:",
1939 sense_size, sense_offset);
1940 for (i = 0; i < sense_size; i++) {
1943 printk("0x%x ", cmd->sense_buffer[i]);
1951 case SCSI_STATUS_QUEUE_FULL:
1953 * By the time the core driver has returned this
1954 * command, all other commands that were queued
1955 * to us but not the device have been returned.
1956 * This ensures that dev->active is equal to
1957 * the number of commands actually queued to
1960 dev->tag_success_count = 0;
1961 if (dev->active != 0) {
1963 * Drop our opening count to the number
1964 * of commands currently outstanding.
1968 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1969 ahd_print_path(ahd, scb);
1970 printk("Dropping tag count to %d\n",
1974 if (dev->active == dev->tags_on_last_queuefull) {
1976 dev->last_queuefull_same_count++;
1978 * If we repeatedly see a queue full
1979 * at the same queue depth, this
1980 * device has a fixed number of tag
1981 * slots. Lock in this tag depth
1982 * so we stop seeing queue fulls from
1985 if (dev->last_queuefull_same_count
1986 == AHD_LOCK_TAGS_COUNT) {
1987 dev->maxtags = dev->active;
1988 ahd_print_path(ahd, scb);
1989 printk("Locking max tag count at %d\n",
1993 dev->tags_on_last_queuefull = dev->active;
1994 dev->last_queuefull_same_count = 0;
1996 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1997 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1998 ahd_platform_set_tags(ahd, sdev, &devinfo,
1999 (dev->flags & AHD_DEV_Q_BASIC)
2000 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2004 * Drop down to a single opening, and treat this
2005 * as if the target returned BUSY SCSI status.
2008 ahd_platform_set_tags(ahd, sdev, &devinfo,
2009 (dev->flags & AHD_DEV_Q_BASIC)
2010 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
2011 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
2016 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
2019 int new_status = DID_OK;
2020 int do_fallback = 0;
2024 * Map CAM error codes into Linux Error codes. We
2025 * avoid the conversion so that the DV code has the
2026 * full error information available when making
2027 * state change decisions.
2030 status = ahd_cmd_get_transaction_status(cmd);
2032 case CAM_REQ_INPROG:
2034 new_status = DID_OK;
2036 case CAM_AUTOSENSE_FAIL:
2037 new_status = DID_ERROR;
2039 case CAM_SCSI_STATUS_ERROR:
2040 scsi_status = ahd_cmd_get_scsi_status(cmd);
2042 switch(scsi_status) {
2043 case SCSI_STATUS_CMD_TERMINATED:
2044 case SCSI_STATUS_CHECK_COND:
2045 if ((cmd->result >> 24) != DRIVER_SENSE) {
2048 struct scsi_sense_data *sense;
2050 sense = (struct scsi_sense_data *)
2052 if (sense->extra_len >= 5 &&
2053 (sense->add_sense_code == 0x47
2054 || sense->add_sense_code == 0x48))
2062 case CAM_REQ_ABORTED:
2063 new_status = DID_ABORT;
2066 new_status = DID_BUS_BUSY;
2068 case CAM_REQ_INVALID:
2069 case CAM_PATH_INVALID:
2070 new_status = DID_BAD_TARGET;
2072 case CAM_SEL_TIMEOUT:
2073 new_status = DID_NO_CONNECT;
2075 case CAM_SCSI_BUS_RESET:
2077 new_status = DID_RESET;
2079 case CAM_UNCOR_PARITY:
2080 new_status = DID_PARITY;
2083 case CAM_CMD_TIMEOUT:
2084 new_status = DID_TIME_OUT;
2087 case CAM_REQ_CMP_ERR:
2088 case CAM_UNEXP_BUSFREE:
2089 case CAM_DATA_RUN_ERR:
2090 new_status = DID_ERROR;
2095 case CAM_SEQUENCE_FAIL:
2096 case CAM_CCB_LEN_ERR:
2097 case CAM_PROVIDE_FAIL:
2098 case CAM_REQ_TERMIO:
2099 case CAM_UNREC_HBA_ERROR:
2100 case CAM_REQ_TOO_BIG:
2101 new_status = DID_ERROR;
2103 case CAM_REQUEUE_REQ:
2104 new_status = DID_REQUEUE;
2107 /* We should never get here */
2108 new_status = DID_ERROR;
2113 printk("%s: device overrun (status %x) on %d:%d:%d\n",
2114 ahd_name(ahd), status, cmd->device->channel,
2115 cmd->device->id, (u8)cmd->device->lun);
2118 ahd_cmd_set_transaction_status(cmd, new_status);
2120 cmd->scsi_done(cmd);
2124 ahd_freeze_simq(struct ahd_softc *ahd)
2126 scsi_block_requests(ahd->platform_data->host);
2130 ahd_release_simq(struct ahd_softc *ahd)
2132 scsi_unblock_requests(ahd->platform_data->host);
2136 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2138 struct ahd_softc *ahd;
2139 struct ahd_linux_device *dev;
2140 struct scb *pending_scb;
2142 u_int active_scbptr;
2146 int retval = SUCCESS;
2151 ahd_mode_state saved_modes;
2152 unsigned long flags;
2157 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2159 scmd_printk(KERN_INFO, cmd,
2160 "Attempting to queue an ABORT message:");
2163 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2164 printk(" 0x%x", cmd->cmnd[cdb_byte]);
2167 ahd_lock(ahd, &flags);
2170 * First determine if we currently own this command.
2171 * Start by searching the device queue. If not found
2172 * there, check the pending_scb list. If not found
2173 * at all, and the system wanted us to just abort the
2174 * command, return success.
2176 dev = scsi_transport_device_data(cmd->device);
2180 * No target device for this command exists,
2181 * so we must not still own the command.
2183 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2188 * See if we can find a matching cmd in the pending list.
2190 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2191 if (pending_scb->io_ctx == cmd)
2195 if (pending_scb == NULL) {
2196 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2200 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2202 * We can't queue two recovery actions using the same SCB
2209 * Ensure that the card doesn't do anything
2210 * behind our back. Also make sure that we
2211 * didn't "just" miss an interrupt that would
2214 was_paused = ahd_is_paused(ahd);
2215 ahd_pause_and_flushwork(ahd);
2218 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2219 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2223 printk("%s: At time of recovery, card was %spaused\n",
2224 ahd_name(ahd), was_paused ? "" : "not ");
2225 ahd_dump_card_state(ahd);
2227 disconnected = TRUE;
2228 if (ahd_search_qinfifo(ahd, cmd->device->id,
2229 cmd->device->channel + 'A',
2231 pending_scb->hscb->tag,
2232 ROLE_INITIATOR, CAM_REQ_ABORTED,
2233 SEARCH_COMPLETE) > 0) {
2234 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2235 ahd_name(ahd), cmd->device->channel,
2236 cmd->device->id, (u8)cmd->device->lun);
2240 saved_modes = ahd_save_modes(ahd);
2241 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2242 last_phase = ahd_inb(ahd, LASTPHASE);
2243 saved_scbptr = ahd_get_scbptr(ahd);
2244 active_scbptr = saved_scbptr;
2245 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2246 struct scb *bus_scb;
2248 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2249 if (bus_scb == pending_scb)
2250 disconnected = FALSE;
2254 * At this point, pending_scb is the scb associated with the
2255 * passed in command. That command is currently active on the
2256 * bus or is in the disconnected state.
2258 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2259 if (last_phase != P_BUSFREE
2260 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2263 * We're active on the bus, so assert ATN
2264 * and hope that the target responds.
2266 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2267 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2268 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2269 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2270 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2272 } else if (disconnected) {
2275 * Actually re-queue this SCB in an attempt
2276 * to select the device before it reconnects.
2278 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2279 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2280 pending_scb->hscb->cdb_len = 0;
2281 pending_scb->hscb->task_attribute = 0;
2282 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2284 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2286 * Mark the SCB has having an outstanding
2287 * task management function. Should the command
2288 * complete normally before the task management
2289 * function can be sent, the host will be notified
2290 * to abort our requeued SCB.
2292 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2293 pending_scb->hscb->task_management);
2296 * If non-packetized, set the MK_MESSAGE control
2297 * bit indicating that we desire to send a message.
2298 * We also set the disconnected flag since there is
2299 * no guarantee that our SCB control byte matches
2300 * the version on the card. We don't want the
2301 * sequencer to abort the command thinking an
2302 * unsolicited reselection occurred.
2304 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2307 * The sequencer will never re-reference the
2308 * in-core SCB. To make sure we are notified
2309 * during reselection, set the MK_MESSAGE flag in
2310 * the card's copy of the SCB.
2312 ahd_outb(ahd, SCB_CONTROL,
2313 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2317 * Clear out any entries in the QINFIFO first
2318 * so we are the next SCB for this target
2321 ahd_search_qinfifo(ahd, cmd->device->id,
2322 cmd->device->channel + 'A', cmd->device->lun,
2323 SCB_LIST_NULL, ROLE_INITIATOR,
2324 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2325 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2326 ahd_set_scbptr(ahd, saved_scbptr);
2327 ahd_print_path(ahd, pending_scb);
2328 printk("Device is disconnected, re-queuing SCB\n");
2331 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2336 ahd_restore_modes(ahd, saved_modes);
2341 DECLARE_COMPLETION_ONSTACK(done);
2343 ahd->platform_data->eh_done = &done;
2344 ahd_unlock(ahd, &flags);
2346 printk("%s: Recovery code sleeping\n", ahd_name(ahd));
2347 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2348 ahd_lock(ahd, &flags);
2349 ahd->platform_data->eh_done = NULL;
2350 ahd_unlock(ahd, &flags);
2351 printk("%s: Timer Expired (active %d)\n",
2352 ahd_name(ahd), dev->active);
2355 printk("Recovery code awake\n");
2357 ahd_unlock(ahd, &flags);
2359 if (retval != SUCCESS)
2360 printk("%s: Command abort returning 0x%x\n",
2361 ahd_name(ahd), retval);
2366 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2368 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2369 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2370 struct ahd_devinfo devinfo;
2371 unsigned long flags;
2373 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2374 starget->channel + 'A', ROLE_INITIATOR);
2375 ahd_lock(ahd, &flags);
2376 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2377 ahd_unlock(ahd, &flags);
2380 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2382 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2383 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2384 struct ahd_tmode_tstate *tstate;
2385 struct ahd_initiator_tinfo *tinfo
2386 = ahd_fetch_transinfo(ahd,
2387 starget->channel + 'A',
2388 shost->this_id, starget->id, &tstate);
2389 struct ahd_devinfo devinfo;
2390 unsigned int ppr_options = tinfo->goal.ppr_options;
2392 unsigned long flags;
2393 unsigned long offset = tinfo->goal.offset;
2396 if ((ahd_debug & AHD_SHOW_DV) != 0)
2397 printk("%s: set period to %d\n", ahd_name(ahd), period);
2400 offset = MAX_OFFSET;
2405 if (spi_max_width(starget)) {
2406 ppr_options |= MSG_EXT_PPR_DT_REQ;
2408 ppr_options |= MSG_EXT_PPR_IU_REQ;
2413 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2415 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2416 starget->channel + 'A', ROLE_INITIATOR);
2418 /* all PPR requests apart from QAS require wide transfers */
2419 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2420 if (spi_width(starget) == 0)
2421 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2424 ahd_find_syncrate(ahd, &period, &ppr_options,
2425 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2427 ahd_lock(ahd, &flags);
2428 ahd_set_syncrate(ahd, &devinfo, period, offset,
2429 ppr_options, AHD_TRANS_GOAL, FALSE);
2430 ahd_unlock(ahd, &flags);
2433 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2435 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2436 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2437 struct ahd_tmode_tstate *tstate;
2438 struct ahd_initiator_tinfo *tinfo
2439 = ahd_fetch_transinfo(ahd,
2440 starget->channel + 'A',
2441 shost->this_id, starget->id, &tstate);
2442 struct ahd_devinfo devinfo;
2443 unsigned int ppr_options = 0;
2444 unsigned int period = 0;
2445 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2446 unsigned long flags;
2449 if ((ahd_debug & AHD_SHOW_DV) != 0)
2450 printk("%s: set offset to %d\n", ahd_name(ahd), offset);
2453 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2454 starget->channel + 'A', ROLE_INITIATOR);
2456 period = tinfo->goal.period;
2457 ppr_options = tinfo->goal.ppr_options;
2458 ahd_find_syncrate(ahd, &period, &ppr_options,
2459 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2462 ahd_lock(ahd, &flags);
2463 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2464 AHD_TRANS_GOAL, FALSE);
2465 ahd_unlock(ahd, &flags);
2468 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2470 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2471 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2472 struct ahd_tmode_tstate *tstate;
2473 struct ahd_initiator_tinfo *tinfo
2474 = ahd_fetch_transinfo(ahd,
2475 starget->channel + 'A',
2476 shost->this_id, starget->id, &tstate);
2477 struct ahd_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;
2485 if ((ahd_debug & AHD_SHOW_DV) != 0)
2486 printk("%s: %s DT\n", ahd_name(ahd),
2487 dt ? "enabling" : "disabling");
2489 if (dt && spi_max_width(starget)) {
2490 ppr_options |= MSG_EXT_PPR_DT_REQ;
2492 ahd_linux_set_width(starget, 1);
2495 period = 10; /* If resetting DT, period must be >= 25ns */
2496 /* IU is invalid without DT set */
2497 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2499 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2500 starget->channel + 'A', ROLE_INITIATOR);
2501 ahd_find_syncrate(ahd, &period, &ppr_options,
2502 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2504 ahd_lock(ahd, &flags);
2505 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2506 ppr_options, AHD_TRANS_GOAL, FALSE);
2507 ahd_unlock(ahd, &flags);
2510 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2512 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2513 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2514 struct ahd_tmode_tstate *tstate;
2515 struct ahd_initiator_tinfo *tinfo
2516 = ahd_fetch_transinfo(ahd,
2517 starget->channel + 'A',
2518 shost->this_id, starget->id, &tstate);
2519 struct ahd_devinfo devinfo;
2520 unsigned int ppr_options = tinfo->goal.ppr_options
2521 & ~MSG_EXT_PPR_QAS_REQ;
2522 unsigned int period = tinfo->goal.period;
2524 unsigned long flags;
2527 if ((ahd_debug & AHD_SHOW_DV) != 0)
2528 printk("%s: %s QAS\n", ahd_name(ahd),
2529 qas ? "enabling" : "disabling");
2533 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2536 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2538 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2539 starget->channel + 'A', ROLE_INITIATOR);
2540 ahd_find_syncrate(ahd, &period, &ppr_options,
2541 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2543 ahd_lock(ahd, &flags);
2544 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2545 ppr_options, AHD_TRANS_GOAL, FALSE);
2546 ahd_unlock(ahd, &flags);
2549 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2551 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2552 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2553 struct ahd_tmode_tstate *tstate;
2554 struct ahd_initiator_tinfo *tinfo
2555 = ahd_fetch_transinfo(ahd,
2556 starget->channel + 'A',
2557 shost->this_id, starget->id, &tstate);
2558 struct ahd_devinfo devinfo;
2559 unsigned int ppr_options = tinfo->goal.ppr_options
2560 & ~MSG_EXT_PPR_IU_REQ;
2561 unsigned int period = tinfo->goal.period;
2563 unsigned long flags;
2566 if ((ahd_debug & AHD_SHOW_DV) != 0)
2567 printk("%s: %s IU\n", ahd_name(ahd),
2568 iu ? "enabling" : "disabling");
2571 if (iu && spi_max_width(starget)) {
2572 ppr_options |= MSG_EXT_PPR_IU_REQ;
2573 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2576 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2578 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2579 starget->channel + 'A', ROLE_INITIATOR);
2580 ahd_find_syncrate(ahd, &period, &ppr_options,
2581 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2583 ahd_lock(ahd, &flags);
2584 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2585 ppr_options, AHD_TRANS_GOAL, FALSE);
2586 ahd_unlock(ahd, &flags);
2589 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2591 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2592 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2593 struct ahd_tmode_tstate *tstate;
2594 struct ahd_initiator_tinfo *tinfo
2595 = ahd_fetch_transinfo(ahd,
2596 starget->channel + 'A',
2597 shost->this_id, starget->id, &tstate);
2598 struct ahd_devinfo devinfo;
2599 unsigned int ppr_options = tinfo->goal.ppr_options
2600 & ~MSG_EXT_PPR_RD_STRM;
2601 unsigned int period = tinfo->goal.period;
2602 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2603 unsigned long flags;
2606 if ((ahd_debug & AHD_SHOW_DV) != 0)
2607 printk("%s: %s Read Streaming\n", ahd_name(ahd),
2608 rdstrm ? "enabling" : "disabling");
2611 if (rdstrm && spi_max_width(starget))
2612 ppr_options |= MSG_EXT_PPR_RD_STRM;
2614 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2615 starget->channel + 'A', ROLE_INITIATOR);
2616 ahd_find_syncrate(ahd, &period, &ppr_options,
2617 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2619 ahd_lock(ahd, &flags);
2620 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2621 ppr_options, AHD_TRANS_GOAL, FALSE);
2622 ahd_unlock(ahd, &flags);
2625 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2627 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2628 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2629 struct ahd_tmode_tstate *tstate;
2630 struct ahd_initiator_tinfo *tinfo
2631 = ahd_fetch_transinfo(ahd,
2632 starget->channel + 'A',
2633 shost->this_id, starget->id, &tstate);
2634 struct ahd_devinfo devinfo;
2635 unsigned int ppr_options = tinfo->goal.ppr_options
2636 & ~MSG_EXT_PPR_WR_FLOW;
2637 unsigned int period = tinfo->goal.period;
2638 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2639 unsigned long flags;
2642 if ((ahd_debug & AHD_SHOW_DV) != 0)
2643 printk("%s: %s Write Flow Control\n", ahd_name(ahd),
2644 wrflow ? "enabling" : "disabling");
2647 if (wrflow && spi_max_width(starget))
2648 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2650 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2651 starget->channel + 'A', ROLE_INITIATOR);
2652 ahd_find_syncrate(ahd, &period, &ppr_options,
2653 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2655 ahd_lock(ahd, &flags);
2656 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2657 ppr_options, AHD_TRANS_GOAL, FALSE);
2658 ahd_unlock(ahd, &flags);
2661 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2663 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2664 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2665 struct ahd_tmode_tstate *tstate;
2666 struct ahd_initiator_tinfo *tinfo
2667 = ahd_fetch_transinfo(ahd,
2668 starget->channel + 'A',
2669 shost->this_id, starget->id, &tstate);
2670 struct ahd_devinfo devinfo;
2671 unsigned int ppr_options = tinfo->goal.ppr_options
2673 unsigned int period = tinfo->goal.period;
2674 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2675 unsigned long flags;
2677 if ((ahd->features & AHD_RTI) == 0) {
2679 if ((ahd_debug & AHD_SHOW_DV) != 0)
2680 printk("%s: RTI not available\n", ahd_name(ahd));
2686 if ((ahd_debug & AHD_SHOW_DV) != 0)
2687 printk("%s: %s RTI\n", ahd_name(ahd),
2688 rti ? "enabling" : "disabling");
2691 if (rti && spi_max_width(starget))
2692 ppr_options |= MSG_EXT_PPR_RTI;
2694 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2695 starget->channel + 'A', ROLE_INITIATOR);
2696 ahd_find_syncrate(ahd, &period, &ppr_options,
2697 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2699 ahd_lock(ahd, &flags);
2700 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2701 ppr_options, AHD_TRANS_GOAL, FALSE);
2702 ahd_unlock(ahd, &flags);
2705 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2707 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2708 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2709 struct ahd_tmode_tstate *tstate;
2710 struct ahd_initiator_tinfo *tinfo
2711 = ahd_fetch_transinfo(ahd,
2712 starget->channel + 'A',
2713 shost->this_id, starget->id, &tstate);
2714 struct ahd_devinfo devinfo;
2715 unsigned int ppr_options = tinfo->goal.ppr_options
2716 & ~MSG_EXT_PPR_PCOMP_EN;
2717 unsigned int period = tinfo->goal.period;
2718 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2719 unsigned long flags;
2722 if ((ahd_debug & AHD_SHOW_DV) != 0)
2723 printk("%s: %s Precompensation\n", ahd_name(ahd),
2724 pcomp ? "Enable" : "Disable");
2727 if (pcomp && spi_max_width(starget)) {
2730 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2731 const struct ahd_linux_iocell_opts *iocell_opts;
2733 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2734 precomp = iocell_opts->precomp;
2736 precomp = AIC79XX_DEFAULT_PRECOMP;
2738 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2739 AHD_SET_PRECOMP(ahd, precomp);
2741 AHD_SET_PRECOMP(ahd, 0);
2744 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2745 starget->channel + 'A', ROLE_INITIATOR);
2746 ahd_find_syncrate(ahd, &period, &ppr_options,
2747 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2749 ahd_lock(ahd, &flags);
2750 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2751 ppr_options, AHD_TRANS_GOAL, FALSE);
2752 ahd_unlock(ahd, &flags);
2755 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2757 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2758 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2759 struct ahd_tmode_tstate *tstate;
2760 struct ahd_initiator_tinfo *tinfo
2761 = ahd_fetch_transinfo(ahd,
2762 starget->channel + 'A',
2763 shost->this_id, starget->id, &tstate);
2764 struct ahd_devinfo devinfo;
2765 unsigned int ppr_options = tinfo->goal.ppr_options
2766 & ~MSG_EXT_PPR_HOLD_MCS;
2767 unsigned int period = tinfo->goal.period;
2768 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2769 unsigned long flags;
2771 if (hold && spi_max_width(starget))
2772 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2774 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2775 starget->channel + 'A', ROLE_INITIATOR);
2776 ahd_find_syncrate(ahd, &period, &ppr_options,
2777 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2779 ahd_lock(ahd, &flags);
2780 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2781 ppr_options, AHD_TRANS_GOAL, FALSE);
2782 ahd_unlock(ahd, &flags);
2785 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2787 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2788 unsigned long flags;
2791 ahd_lock(ahd, &flags);
2793 mode = ahd_inb(ahd, SBLKCTL);
2795 ahd_unlock(ahd, &flags);
2798 spi_signalling(shost) = SPI_SIGNAL_LVD;
2799 else if (mode & ENAB20)
2800 spi_signalling(shost) = SPI_SIGNAL_SE;
2802 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2805 static struct spi_function_template ahd_linux_transport_functions = {
2806 .set_offset = ahd_linux_set_offset,
2808 .set_period = ahd_linux_set_period,
2810 .set_width = ahd_linux_set_width,
2812 .set_dt = ahd_linux_set_dt,
2814 .set_iu = ahd_linux_set_iu,
2816 .set_qas = ahd_linux_set_qas,
2818 .set_rd_strm = ahd_linux_set_rd_strm,
2820 .set_wr_flow = ahd_linux_set_wr_flow,
2822 .set_rti = ahd_linux_set_rti,
2824 .set_pcomp_en = ahd_linux_set_pcomp_en,
2826 .set_hold_mcs = ahd_linux_set_hold_mcs,
2828 .get_signalling = ahd_linux_get_signalling,
2832 ahd_linux_init(void)
2837 * If we've been passed any parameters, process them now.
2840 aic79xx_setup(aic79xx);
2842 ahd_linux_transport_template =
2843 spi_attach_transport(&ahd_linux_transport_functions);
2844 if (!ahd_linux_transport_template)
2847 scsi_transport_reserve_device(ahd_linux_transport_template,
2848 sizeof(struct ahd_linux_device));
2850 error = ahd_linux_pci_init();
2852 spi_release_transport(ahd_linux_transport_template);
2857 ahd_linux_exit(void)
2859 ahd_linux_pci_exit();
2860 spi_release_transport(ahd_linux_transport_template);
2863 module_init(ahd_linux_init);
2864 module_exit(ahd_linux_exit);