2 * Adaptec AIC7xxx device driver for Linux.
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
6 * Copyright (c) 1994 John Aycock
7 * The University of Calgary Department of Computer Science.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, write to
21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
24 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
25 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
26 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
27 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
28 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
29 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
30 * ANSI SCSI-2 specification (draft 10c), ...
32 * --------------------------------------------------------------------------
34 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
36 * Substantially modified to include support for wide and twin bus
37 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
38 * SCB paging, and other rework of the code.
40 * --------------------------------------------------------------------------
41 * Copyright (c) 1994-2000 Justin T. Gibbs.
42 * Copyright (c) 2000-2001 Adaptec Inc.
43 * All rights reserved.
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions, and the following disclaimer,
50 * without modification.
51 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
52 * substantially similar to the "NO WARRANTY" disclaimer below
53 * ("Disclaimer") and any redistribution must be conditioned upon
54 * including a substantially similar Disclaimer requirement for further
55 * binary redistribution.
56 * 3. Neither the names of the above-listed copyright holders nor the names
57 * of any contributors may be used to endorse or promote products derived
58 * from this software without specific prior written permission.
60 * Alternatively, this software may be distributed under the terms of the
61 * GNU General Public License ("GPL") version 2 as published by the Free
62 * Software Foundation.
65 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
66 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
67 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
68 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
69 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
73 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
74 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
75 * POSSIBILITY OF SUCH DAMAGES.
77 *---------------------------------------------------------------------------
79 * Thanks also go to (in alphabetical order) the following:
81 * Rory Bolt - Sequencer bug fixes
82 * Jay Estabrook - Initial DEC Alpha support
83 * Doug Ledford - Much needed abort/reset bug fixes
84 * Kai Makisara - DMAing of SCBs
86 * A Boot time option was also added for not resetting the scsi bus.
88 * Form: aic7xxx=extended
92 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
94 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
98 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
100 * Copyright (c) 1997-1999 Doug Ledford
102 * These changes are released under the same licensing terms as the FreeBSD
103 * driver written by Justin Gibbs. Please see his Copyright notice above
104 * for the exact terms and conditions covering my changes as well as the
105 * warranty statement.
107 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
108 * but are not limited to:
110 * 1: Import of the latest FreeBSD sequencer code for this driver
111 * 2: Modification of kernel code to accommodate different sequencer semantics
112 * 3: Extensive changes throughout kernel portion of driver to improve
113 * abort/reset processing and error hanndling
114 * 4: Other work contributed by various people on the Internet
115 * 5: Changes to printk information and verbosity selection code
116 * 6: General reliability related changes, especially in IRQ management
117 * 7: Modifications to the default probe/attach order for supported cards
118 * 8: SMP friendliness has been improved
122 #include "aic7xxx_osm.h"
123 #include "aic7xxx_inline.h"
124 #include <scsi/scsicam.h>
126 static struct scsi_transport_template
*ahc_linux_transport_template
= NULL
;
128 #include <linux/init.h> /* __setup */
129 #include <linux/mm.h> /* For fetching system memory size */
130 #include <linux/blkdev.h> /* For block_size() */
131 #include <linux/delay.h> /* For ssleep/msleep */
132 #include <linux/slab.h>
136 * Set this to the delay in seconds after SCSI bus reset.
137 * Note, we honor this only for the initial bus reset.
138 * The scsi error recovery code performs its own bus settle
139 * delay handling for error recovery actions.
141 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
142 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
144 #define AIC7XXX_RESET_DELAY 5000
148 * To change the default number of tagged transactions allowed per-device,
149 * add a line to the lilo.conf file like:
150 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
151 * which will result in the first four devices on the first two
152 * controllers being set to a tagged queue depth of 32.
154 * The tag_commands is an array of 16 to allow for wide and twin adapters.
155 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
159 uint8_t tag_commands
[16]; /* Allow for wide/twin adapters. */
160 } adapter_tag_info_t
;
163 * Modify this as you see fit for your system.
165 * 0 tagged queuing disabled
166 * 1 <= n <= 253 n == max tags ever dispatched.
168 * The driver will throttle the number of commands dispatched to a
169 * device if it returns queue full. For devices with a fixed maximum
170 * queue depth, the driver will eventually determine this depth and
171 * lock it in (a console message is printed to indicate that a lock
172 * has occurred). On some devices, queue full is returned for a temporary
173 * resource shortage. These devices will return queue full at varying
174 * depths. The driver will throttle back when the queue fulls occur and
175 * attempt to slowly increase the depth over time as the device recovers
176 * from the resource shortage.
178 * In this example, the first line will disable tagged queueing for all
179 * the devices on the first probed aic7xxx adapter.
181 * The second line enables tagged queueing with 4 commands/LUN for IDs
182 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
183 * driver to attempt to use up to 64 tags for ID 1.
185 * The third line is the same as the first line.
187 * The fourth line disables tagged queueing for devices 0 and 3. It
188 * enables tagged queueing for the other IDs, with 16 commands/LUN
189 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
190 * IDs 2, 5-7, and 9-15.
194 * NOTE: The below structure is for reference only, the actual structure
195 * to modify in order to change things is just below this comment block.
196 adapter_tag_info_t aic7xxx_tag_info[] =
198 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
199 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
200 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
201 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
205 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
206 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
208 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
211 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
212 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
213 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
214 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
215 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
216 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
217 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
218 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
219 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
223 * By default, use the number of commands specified by
224 * the users kernel configuration.
226 static adapter_tag_info_t aic7xxx_tag_info
[] =
228 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
229 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
230 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
231 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
232 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
233 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
234 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
235 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
236 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
237 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
238 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
239 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
240 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
241 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
242 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
243 {AIC7XXX_CONFIGED_TAG_COMMANDS
}
247 * There should be a specific return value for this in scsi.h, but
248 * it seems that most drivers ignore it.
250 #define DID_UNDERFLOW DID_ERROR
253 ahc_print_path(struct ahc_softc
*ahc
, struct scb
*scb
)
255 printk("(scsi%d:%c:%d:%d): ",
256 ahc
->platform_data
->host
->host_no
,
257 scb
!= NULL
? SCB_GET_CHANNEL(ahc
, scb
) : 'X',
258 scb
!= NULL
? SCB_GET_TARGET(ahc
, scb
) : -1,
259 scb
!= NULL
? SCB_GET_LUN(scb
) : -1);
263 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
264 * cards in the system. This should be fixed. Exceptions to this
265 * rule are noted in the comments.
269 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
270 * has no effect on any later resets that might occur due to things like
273 static uint32_t aic7xxx_no_reset
;
276 * Should we force EXTENDED translation on a controller.
277 * 0 == Use whatever is in the SEEPROM or default to off
278 * 1 == Use whatever is in the SEEPROM or default to on
280 static uint32_t aic7xxx_extended
;
283 * PCI bus parity checking of the Adaptec controllers. This is somewhat
284 * dubious at best. To my knowledge, this option has never actually
285 * solved a PCI parity problem, but on certain machines with broken PCI
286 * chipset configurations where stray PCI transactions with bad parity are
287 * the norm rather than the exception, the error messages can be overwhelming.
288 * It's included in the driver for completeness.
289 * 0 = Shut off PCI parity check
290 * non-0 = reverse polarity pci parity checking
292 static uint32_t aic7xxx_pci_parity
= ~0;
295 * There are lots of broken chipsets in the world. Some of them will
296 * violate the PCI spec when we issue byte sized memory writes to our
297 * controller. I/O mapped register access, if allowed by the given
298 * platform, will work in almost all cases.
300 uint32_t aic7xxx_allow_memio
= ~0;
303 * So that we can set how long each device is given as a selection timeout.
304 * The table of values goes like this:
309 * We default to 256ms because some older devices need a longer time
310 * to respond to initial selection.
312 static uint32_t aic7xxx_seltime
;
315 * Certain devices do not perform any aging on commands. Should the
316 * device be saturated by commands in one portion of the disk, it is
317 * possible for transactions on far away sectors to never be serviced.
318 * To handle these devices, we can periodically send an ordered tag to
319 * force all outstanding transactions to be serviced prior to a new
322 static uint32_t aic7xxx_periodic_otag
;
325 * Module information and settable options.
327 static char *aic7xxx
= NULL
;
329 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
330 MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver");
331 MODULE_LICENSE("Dual BSD/GPL");
332 MODULE_VERSION(AIC7XXX_DRIVER_VERSION
);
333 module_param(aic7xxx
, charp
, 0444);
334 MODULE_PARM_DESC(aic7xxx
,
335 "period-delimited options string:\n"
336 " verbose Enable verbose/diagnostic logging\n"
337 " allow_memio Allow device registers to be memory mapped\n"
338 " debug Bitmask of debug values to enable\n"
339 " no_probe Toggle EISA/VLB controller probing\n"
340 " probe_eisa_vl Toggle EISA/VLB controller probing\n"
341 " no_reset Suppress initial bus resets\n"
342 " extended Enable extended geometry on all controllers\n"
343 " periodic_otag Send an ordered tagged transaction\n"
344 " periodically to prevent tag starvation.\n"
345 " This may be required by some older disk\n"
346 " drives or RAID arrays.\n"
347 " tag_info:<tag_str> Set per-target tag depth\n"
348 " global_tag_depth:<int> Global tag depth for every target\n"
350 " seltime:<int> Selection Timeout\n"
351 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
353 " Sample modprobe configuration file:\n"
354 " # Toggle EISA/VLB probing\n"
355 " # Set tag depth on Controller 1/Target 1 to 10 tags\n"
356 " # Shorten the selection timeout to 128ms\n"
358 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
361 static void ahc_linux_handle_scsi_status(struct ahc_softc
*,
362 struct scsi_device
*,
364 static void ahc_linux_queue_cmd_complete(struct ahc_softc
*ahc
,
365 struct scsi_cmnd
*cmd
);
366 static void ahc_linux_freeze_simq(struct ahc_softc
*ahc
);
367 static void ahc_linux_release_simq(struct ahc_softc
*ahc
);
368 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd
*cmd
, scb_flag flag
);
369 static void ahc_linux_initialize_scsi_bus(struct ahc_softc
*ahc
);
370 static u_int
ahc_linux_user_tagdepth(struct ahc_softc
*ahc
,
371 struct ahc_devinfo
*devinfo
);
372 static void ahc_linux_device_queue_depth(struct scsi_device
*);
373 static int ahc_linux_run_command(struct ahc_softc
*,
374 struct ahc_linux_device
*,
376 static void ahc_linux_setup_tag_info_global(char *p
);
377 static int aic7xxx_setup(char *s
);
379 static int ahc_linux_unit
;
382 /************************** OS Utility Wrappers *******************************/
387 * udelay on Linux can have problems for
388 * multi-millisecond waits. Wait at most
397 /***************************** Low Level I/O **********************************/
399 ahc_inb(struct ahc_softc
* ahc
, long port
)
403 if (ahc
->tag
== BUS_SPACE_MEMIO
) {
404 x
= readb(ahc
->bsh
.maddr
+ port
);
406 x
= inb(ahc
->bsh
.ioport
+ port
);
413 ahc_outb(struct ahc_softc
* ahc
, long port
, uint8_t val
)
415 if (ahc
->tag
== BUS_SPACE_MEMIO
) {
416 writeb(val
, ahc
->bsh
.maddr
+ port
);
418 outb(val
, ahc
->bsh
.ioport
+ port
);
424 ahc_outsb(struct ahc_softc
* ahc
, long port
, uint8_t *array
, int count
)
429 * There is probably a more efficient way to do this on Linux
430 * but we don't use this for anything speed critical and this
433 for (i
= 0; i
< count
; i
++)
434 ahc_outb(ahc
, port
, *array
++);
438 ahc_insb(struct ahc_softc
* ahc
, long port
, uint8_t *array
, int count
)
443 * There is probably a more efficient way to do this on Linux
444 * but we don't use this for anything speed critical and this
447 for (i
= 0; i
< count
; i
++)
448 *array
++ = ahc_inb(ahc
, port
);
451 /********************************* Inlines ************************************/
452 static void ahc_linux_unmap_scb(struct ahc_softc
*, struct scb
*);
454 static int ahc_linux_map_seg(struct ahc_softc
*ahc
, struct scb
*scb
,
455 struct ahc_dma_seg
*sg
,
456 dma_addr_t addr
, bus_size_t len
);
459 ahc_linux_unmap_scb(struct ahc_softc
*ahc
, struct scb
*scb
)
461 struct scsi_cmnd
*cmd
;
464 ahc_sync_sglist(ahc
, scb
, BUS_DMASYNC_POSTWRITE
);
470 ahc_linux_map_seg(struct ahc_softc
*ahc
, struct scb
*scb
,
471 struct ahc_dma_seg
*sg
, dma_addr_t addr
, bus_size_t len
)
475 if ((scb
->sg_count
+ 1) > AHC_NSEG
)
476 panic("Too few segs for dma mapping. "
477 "Increase AHC_NSEG\n");
480 sg
->addr
= ahc_htole32(addr
& 0xFFFFFFFF);
481 scb
->platform_data
->xfer_len
+= len
;
483 if (sizeof(dma_addr_t
) > 4
484 && (ahc
->flags
& AHC_39BIT_ADDRESSING
) != 0)
485 len
|= (addr
>> 8) & AHC_SG_HIGH_ADDR_MASK
;
487 sg
->len
= ahc_htole32(len
);
492 * Return a string describing the driver.
495 ahc_linux_info(struct Scsi_Host
*host
)
497 static char buffer
[512];
500 struct ahc_softc
*ahc
;
503 ahc
= *(struct ahc_softc
**)host
->hostdata
;
504 memset(bp
, 0, sizeof(buffer
));
505 strcpy(bp
, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION
"\n"
507 strcat(bp
, ahc
->description
);
510 ahc_controller_info(ahc
, ahc_info
);
511 strcat(bp
, ahc_info
);
518 * Queue an SCB to the controller.
521 ahc_linux_queue_lck(struct scsi_cmnd
* cmd
, void (*scsi_done
) (struct scsi_cmnd
*))
523 struct ahc_softc
*ahc
;
524 struct ahc_linux_device
*dev
= scsi_transport_device_data(cmd
->device
);
525 int rtn
= SCSI_MLQUEUE_HOST_BUSY
;
528 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
530 ahc_lock(ahc
, &flags
);
531 if (ahc
->platform_data
->qfrozen
== 0) {
532 cmd
->scsi_done
= scsi_done
;
533 cmd
->result
= CAM_REQ_INPROG
<< 16;
534 rtn
= ahc_linux_run_command(ahc
, dev
, cmd
);
536 ahc_unlock(ahc
, &flags
);
541 static DEF_SCSI_QCMD(ahc_linux_queue
)
543 static inline struct scsi_target
**
544 ahc_linux_target_in_softc(struct scsi_target
*starget
)
546 struct ahc_softc
*ahc
=
547 *((struct ahc_softc
**)dev_to_shost(&starget
->dev
)->hostdata
);
548 unsigned int target_offset
;
550 target_offset
= starget
->id
;
551 if (starget
->channel
!= 0)
554 return &ahc
->platform_data
->starget
[target_offset
];
558 ahc_linux_target_alloc(struct scsi_target
*starget
)
560 struct ahc_softc
*ahc
=
561 *((struct ahc_softc
**)dev_to_shost(&starget
->dev
)->hostdata
);
562 struct seeprom_config
*sc
= ahc
->seep_config
;
564 struct scsi_target
**ahc_targp
= ahc_linux_target_in_softc(starget
);
565 unsigned short scsirate
;
566 struct ahc_devinfo devinfo
;
567 struct ahc_initiator_tinfo
*tinfo
;
568 struct ahc_tmode_tstate
*tstate
;
569 char channel
= starget
->channel
+ 'A';
570 unsigned int our_id
= ahc
->our_id
;
571 unsigned int target_offset
;
573 target_offset
= starget
->id
;
574 if (starget
->channel
!= 0)
577 if (starget
->channel
)
578 our_id
= ahc
->our_id_b
;
580 ahc_lock(ahc
, &flags
);
582 BUG_ON(*ahc_targp
!= NULL
);
584 *ahc_targp
= starget
;
587 int maxsync
= AHC_SYNCRATE_DT
;
589 int flags
= sc
->device_flags
[target_offset
];
591 if (ahc
->flags
& AHC_NEWEEPROM_FMT
) {
592 if (flags
& CFSYNCHISULTRA
)
594 } else if (flags
& CFULTRAEN
)
596 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
597 * change it to ultra=0, CFXFER = 0 */
598 if(ultra
&& (flags
& CFXFER
) == 0x04) {
603 if ((ahc
->features
& AHC_ULTRA2
) != 0) {
604 scsirate
= (flags
& CFXFER
) | (ultra
? 0x8 : 0);
606 scsirate
= (flags
& CFXFER
) << 4;
607 maxsync
= ultra
? AHC_SYNCRATE_ULTRA
:
610 spi_max_width(starget
) = (flags
& CFWIDEB
) ? 1 : 0;
611 if (!(flags
& CFSYNCH
))
612 spi_max_offset(starget
) = 0;
613 spi_min_period(starget
) =
614 ahc_find_period(ahc
, scsirate
, maxsync
);
616 tinfo
= ahc_fetch_transinfo(ahc
, channel
, ahc
->our_id
,
617 starget
->id
, &tstate
);
619 ahc_compile_devinfo(&devinfo
, our_id
, starget
->id
,
620 CAM_LUN_WILDCARD
, channel
,
622 ahc_set_syncrate(ahc
, &devinfo
, NULL
, 0, 0, 0,
623 AHC_TRANS_GOAL
, /*paused*/FALSE
);
624 ahc_set_width(ahc
, &devinfo
, MSG_EXT_WDTR_BUS_8_BIT
,
625 AHC_TRANS_GOAL
, /*paused*/FALSE
);
626 ahc_unlock(ahc
, &flags
);
632 ahc_linux_target_destroy(struct scsi_target
*starget
)
634 struct scsi_target
**ahc_targp
= ahc_linux_target_in_softc(starget
);
640 ahc_linux_slave_alloc(struct scsi_device
*sdev
)
642 struct ahc_softc
*ahc
=
643 *((struct ahc_softc
**)sdev
->host
->hostdata
);
644 struct scsi_target
*starget
= sdev
->sdev_target
;
645 struct ahc_linux_device
*dev
;
648 printk("%s: Slave Alloc %d\n", ahc_name(ahc
), sdev
->id
);
650 dev
= scsi_transport_device_data(sdev
);
651 memset(dev
, 0, sizeof(*dev
));
654 * We start out life using untagged
655 * transactions of which we allow one.
660 * Set maxtags to 0. This will be changed if we
661 * later determine that we are dealing with
662 * a tagged queuing capable device.
666 spi_period(starget
) = 0;
672 ahc_linux_slave_configure(struct scsi_device
*sdev
)
674 struct ahc_softc
*ahc
;
676 ahc
= *((struct ahc_softc
**)sdev
->host
->hostdata
);
679 sdev_printk(KERN_INFO
, sdev
, "Slave Configure\n");
681 ahc_linux_device_queue_depth(sdev
);
683 /* Initial Domain Validation */
684 if (!spi_initial_dv(sdev
->sdev_target
))
690 #if defined(__i386__)
692 * Return the disk geometry for the given SCSI device.
695 ahc_linux_biosparam(struct scsi_device
*sdev
, struct block_device
*bdev
,
696 sector_t capacity
, int geom
[])
704 struct ahc_softc
*ahc
;
707 ahc
= *((struct ahc_softc
**)sdev
->host
->hostdata
);
708 channel
= sdev_channel(sdev
);
710 bh
= scsi_bios_ptable(bdev
);
712 ret
= scsi_partsize(bh
, capacity
,
713 &geom
[2], &geom
[0], &geom
[1]);
720 cylinders
= aic_sector_div(capacity
, heads
, sectors
);
722 if (aic7xxx_extended
!= 0)
724 else if (channel
== 0)
725 extended
= (ahc
->flags
& AHC_EXTENDED_TRANS_A
) != 0;
727 extended
= (ahc
->flags
& AHC_EXTENDED_TRANS_B
) != 0;
728 if (extended
&& cylinders
>= 1024) {
731 cylinders
= aic_sector_div(capacity
, heads
, sectors
);
741 * Abort the current SCSI command(s).
744 ahc_linux_abort(struct scsi_cmnd
*cmd
)
748 error
= ahc_linux_queue_recovery_cmd(cmd
, SCB_ABORT
);
750 printk("aic7xxx_abort returns 0x%x\n", error
);
755 * Attempt to send a target reset message to the device that timed out.
758 ahc_linux_dev_reset(struct scsi_cmnd
*cmd
)
762 error
= ahc_linux_queue_recovery_cmd(cmd
, SCB_DEVICE_RESET
);
764 printk("aic7xxx_dev_reset returns 0x%x\n", error
);
769 * Reset the SCSI bus.
772 ahc_linux_bus_reset(struct scsi_cmnd
*cmd
)
774 struct ahc_softc
*ahc
;
778 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
780 ahc_lock(ahc
, &flags
);
781 found
= ahc_reset_channel(ahc
, scmd_channel(cmd
) + 'A',
782 /*initiate reset*/TRUE
);
783 ahc_unlock(ahc
, &flags
);
786 printk("%s: SCSI bus reset delivered. "
787 "%d SCBs aborted.\n", ahc_name(ahc
), found
);
792 struct scsi_host_template aic7xxx_driver_template
= {
793 .module
= THIS_MODULE
,
795 .proc_name
= "aic7xxx",
796 .show_info
= ahc_linux_show_info
,
797 .write_info
= ahc_proc_write_seeprom
,
798 .info
= ahc_linux_info
,
799 .queuecommand
= ahc_linux_queue
,
800 .eh_abort_handler
= ahc_linux_abort
,
801 .eh_device_reset_handler
= ahc_linux_dev_reset
,
802 .eh_bus_reset_handler
= ahc_linux_bus_reset
,
803 #if defined(__i386__)
804 .bios_param
= ahc_linux_biosparam
,
806 .can_queue
= AHC_MAX_QUEUE
,
810 .use_clustering
= ENABLE_CLUSTERING
,
811 .slave_alloc
= ahc_linux_slave_alloc
,
812 .slave_configure
= ahc_linux_slave_configure
,
813 .target_alloc
= ahc_linux_target_alloc
,
814 .target_destroy
= ahc_linux_target_destroy
,
818 /**************************** Tasklet Handler *********************************/
820 /******************************** Macros **************************************/
821 #define BUILD_SCSIID(ahc, cmd) \
822 ((((cmd)->device->id << TID_SHIFT) & TID) \
823 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
824 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
826 /******************************** Bus DMA *************************************/
828 ahc_dma_tag_create(struct ahc_softc
*ahc
, bus_dma_tag_t parent
,
829 bus_size_t alignment
, bus_size_t boundary
,
830 dma_addr_t lowaddr
, dma_addr_t highaddr
,
831 bus_dma_filter_t
*filter
, void *filterarg
,
832 bus_size_t maxsize
, int nsegments
,
833 bus_size_t maxsegsz
, int flags
, bus_dma_tag_t
*ret_tag
)
837 dmat
= kmalloc(sizeof(*dmat
), GFP_ATOMIC
);
842 * Linux is very simplistic about DMA memory. For now don't
843 * maintain all specification information. Once Linux supplies
844 * better facilities for doing these operations, or the
845 * needs of this particular driver change, we might need to do
848 dmat
->alignment
= alignment
;
849 dmat
->boundary
= boundary
;
850 dmat
->maxsize
= maxsize
;
856 ahc_dma_tag_destroy(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
)
862 ahc_dmamem_alloc(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, void** vaddr
,
863 int flags
, bus_dmamap_t
*mapp
)
865 *vaddr
= pci_alloc_consistent(ahc
->dev_softc
,
866 dmat
->maxsize
, mapp
);
873 ahc_dmamem_free(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
,
874 void* vaddr
, bus_dmamap_t map
)
876 pci_free_consistent(ahc
->dev_softc
, dmat
->maxsize
,
881 ahc_dmamap_load(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
,
882 void *buf
, bus_size_t buflen
, bus_dmamap_callback_t
*cb
,
883 void *cb_arg
, int flags
)
886 * Assume for now that this will only be used during
887 * initialization and not for per-transaction buffer mapping.
889 bus_dma_segment_t stack_sg
;
891 stack_sg
.ds_addr
= map
;
892 stack_sg
.ds_len
= dmat
->maxsize
;
893 cb(cb_arg
, &stack_sg
, /*nseg*/1, /*error*/0);
898 ahc_dmamap_destroy(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
)
903 ahc_dmamap_unload(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
)
910 ahc_linux_setup_tag_info_global(char *p
)
914 tags
= simple_strtoul(p
+ 1, NULL
, 0) & 0xff;
915 printk("Setting Global Tags= %d\n", tags
);
917 for (i
= 0; i
< ARRAY_SIZE(aic7xxx_tag_info
); i
++) {
918 for (j
= 0; j
< AHC_NUM_TARGETS
; j
++) {
919 aic7xxx_tag_info
[i
].tag_commands
[j
] = tags
;
925 ahc_linux_setup_tag_info(u_long arg
, int instance
, int targ
, int32_t value
)
928 if ((instance
>= 0) && (targ
>= 0)
929 && (instance
< ARRAY_SIZE(aic7xxx_tag_info
))
930 && (targ
< AHC_NUM_TARGETS
)) {
931 aic7xxx_tag_info
[instance
].tag_commands
[targ
] = value
& 0xff;
933 printk("tag_info[%d:%d] = %d\n", instance
, targ
, value
);
938 ahc_parse_brace_option(char *opt_name
, char *opt_arg
, char *end
, int depth
,
939 void (*callback
)(u_long
, int, int, int32_t),
948 char tok_list
[] = {'.', ',', '{', '}', '\0'};
950 /* All options use a ':' name/arg separator */
958 * Restore separator that may be in
959 * the middle of our option argument.
961 tok_end
= strchr(opt_arg
, '\0');
967 if (instance
== -1) {
974 printk("Malformed Option %s\n",
984 else if (instance
!= -1)
994 else if (instance
>= 0)
1003 for (i
= 0; tok_list
[i
]; i
++) {
1004 tok_end2
= strchr(opt_arg
, tok_list
[i
]);
1005 if ((tok_end2
) && (tok_end2
< tok_end
))
1008 callback(callback_arg
, instance
, targ
,
1009 simple_strtol(opt_arg
, NULL
, 0));
1018 * Handle Linux boot parameters. This routine allows for assigning a value
1019 * to a parameter with a ':' between the parameter and the value.
1020 * ie. aic7xxx=stpwlev:1,extended
1023 aic7xxx_setup(char *s
)
1029 static const struct {
1033 { "extended", &aic7xxx_extended
},
1034 { "no_reset", &aic7xxx_no_reset
},
1035 { "verbose", &aic7xxx_verbose
},
1036 { "allow_memio", &aic7xxx_allow_memio
},
1038 { "debug", &ahc_debug
},
1040 { "periodic_otag", &aic7xxx_periodic_otag
},
1041 { "pci_parity", &aic7xxx_pci_parity
},
1042 { "seltime", &aic7xxx_seltime
},
1043 { "tag_info", NULL
},
1044 { "global_tag_depth", NULL
},
1048 end
= strchr(s
, '\0');
1051 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1052 * will never be 0 in this case.
1056 while ((p
= strsep(&s
, ",.")) != NULL
) {
1059 for (i
= 0; i
< ARRAY_SIZE(options
); i
++) {
1061 n
= strlen(options
[i
].name
);
1062 if (strncmp(options
[i
].name
, p
, n
) == 0)
1065 if (i
== ARRAY_SIZE(options
))
1068 if (strncmp(p
, "global_tag_depth", n
) == 0) {
1069 ahc_linux_setup_tag_info_global(p
+ n
);
1070 } else if (strncmp(p
, "tag_info", n
) == 0) {
1071 s
= ahc_parse_brace_option("tag_info", p
+ n
, end
,
1072 2, ahc_linux_setup_tag_info
, 0);
1073 } else if (p
[n
] == ':') {
1074 *(options
[i
].flag
) = simple_strtoul(p
+ n
+ 1, NULL
, 0);
1075 } else if (strncmp(p
, "verbose", n
) == 0) {
1076 *(options
[i
].flag
) = 1;
1078 *(options
[i
].flag
) ^= 0xFFFFFFFF;
1084 __setup("aic7xxx=", aic7xxx_setup
);
1086 uint32_t aic7xxx_verbose
;
1089 ahc_linux_register_host(struct ahc_softc
*ahc
, struct scsi_host_template
*template)
1092 struct Scsi_Host
*host
;
1097 template->name
= ahc
->description
;
1098 host
= scsi_host_alloc(template, sizeof(struct ahc_softc
*));
1102 *((struct ahc_softc
**)host
->hostdata
) = ahc
;
1103 ahc
->platform_data
->host
= host
;
1104 host
->can_queue
= AHC_MAX_QUEUE
;
1105 host
->cmd_per_lun
= 2;
1106 /* XXX No way to communicate the ID for multiple channels */
1107 host
->this_id
= ahc
->our_id
;
1108 host
->irq
= ahc
->platform_data
->irq
;
1109 host
->max_id
= (ahc
->features
& AHC_WIDE
) ? 16 : 8;
1110 host
->max_lun
= AHC_NUM_LUNS
;
1111 host
->max_channel
= (ahc
->features
& AHC_TWIN
) ? 1 : 0;
1112 host
->sg_tablesize
= AHC_NSEG
;
1114 ahc_set_unit(ahc
, ahc_linux_unit
++);
1115 ahc_unlock(ahc
, &s
);
1116 sprintf(buf
, "scsi%d", host
->host_no
);
1117 new_name
= kmalloc(strlen(buf
) + 1, GFP_ATOMIC
);
1118 if (new_name
!= NULL
) {
1119 strcpy(new_name
, buf
);
1120 ahc_set_name(ahc
, new_name
);
1122 host
->unique_id
= ahc
->unit
;
1123 ahc_linux_initialize_scsi_bus(ahc
);
1124 ahc_intr_enable(ahc
, TRUE
);
1126 host
->transportt
= ahc_linux_transport_template
;
1128 retval
= scsi_add_host(host
,
1129 (ahc
->dev_softc
? &ahc
->dev_softc
->dev
: NULL
));
1131 printk(KERN_WARNING
"aic7xxx: scsi_add_host failed\n");
1132 scsi_host_put(host
);
1136 scsi_scan_host(host
);
1141 * Place the SCSI bus into a known state by either resetting it,
1142 * or forcing transfer negotiations on the next command to any
1146 ahc_linux_initialize_scsi_bus(struct ahc_softc
*ahc
)
1157 if (aic7xxx_no_reset
!= 0)
1158 ahc
->flags
&= ~(AHC_RESET_BUS_A
|AHC_RESET_BUS_B
);
1160 if ((ahc
->flags
& AHC_RESET_BUS_A
) != 0)
1161 ahc_reset_channel(ahc
, 'A', /*initiate_reset*/TRUE
);
1163 numtarg
= (ahc
->features
& AHC_WIDE
) ? 16 : 8;
1165 if ((ahc
->features
& AHC_TWIN
) != 0) {
1167 if ((ahc
->flags
& AHC_RESET_BUS_B
) != 0) {
1168 ahc_reset_channel(ahc
, 'B', /*initiate_reset*/TRUE
);
1177 * Force negotiation to async for all targets that
1178 * will not see an initial bus reset.
1180 for (; i
< numtarg
; i
++) {
1181 struct ahc_devinfo devinfo
;
1182 struct ahc_initiator_tinfo
*tinfo
;
1183 struct ahc_tmode_tstate
*tstate
;
1189 our_id
= ahc
->our_id
;
1191 if (i
> 7 && (ahc
->features
& AHC_TWIN
) != 0) {
1193 our_id
= ahc
->our_id_b
;
1196 tinfo
= ahc_fetch_transinfo(ahc
, channel
, our_id
,
1197 target_id
, &tstate
);
1198 ahc_compile_devinfo(&devinfo
, our_id
, target_id
,
1199 CAM_LUN_WILDCARD
, channel
, ROLE_INITIATOR
);
1200 ahc_update_neg_request(ahc
, &devinfo
, tstate
,
1201 tinfo
, AHC_NEG_ALWAYS
);
1203 ahc_unlock(ahc
, &s
);
1204 /* Give the bus some time to recover */
1205 if ((ahc
->flags
& (AHC_RESET_BUS_A
|AHC_RESET_BUS_B
)) != 0) {
1206 ahc_linux_freeze_simq(ahc
);
1207 msleep(AIC7XXX_RESET_DELAY
);
1208 ahc_linux_release_simq(ahc
);
1213 ahc_platform_alloc(struct ahc_softc
*ahc
, void *platform_arg
)
1216 ahc
->platform_data
=
1217 kmalloc(sizeof(struct ahc_platform_data
), GFP_ATOMIC
);
1218 if (ahc
->platform_data
== NULL
)
1220 memset(ahc
->platform_data
, 0, sizeof(struct ahc_platform_data
));
1221 ahc
->platform_data
->irq
= AHC_LINUX_NOIRQ
;
1223 ahc
->seltime
= (aic7xxx_seltime
& 0x3) << 4;
1224 ahc
->seltime_b
= (aic7xxx_seltime
& 0x3) << 4;
1225 if (aic7xxx_pci_parity
== 0)
1226 ahc
->flags
|= AHC_DISABLE_PCI_PERR
;
1232 ahc_platform_free(struct ahc_softc
*ahc
)
1234 struct scsi_target
*starget
;
1237 if (ahc
->platform_data
!= NULL
) {
1238 /* destroy all of the device and target objects */
1239 for (i
= 0; i
< AHC_NUM_TARGETS
; i
++) {
1240 starget
= ahc
->platform_data
->starget
[i
];
1241 if (starget
!= NULL
) {
1242 ahc
->platform_data
->starget
[i
] = NULL
;
1246 if (ahc
->platform_data
->irq
!= AHC_LINUX_NOIRQ
)
1247 free_irq(ahc
->platform_data
->irq
, ahc
);
1248 if (ahc
->tag
== BUS_SPACE_PIO
1249 && ahc
->bsh
.ioport
!= 0)
1250 release_region(ahc
->bsh
.ioport
, 256);
1251 if (ahc
->tag
== BUS_SPACE_MEMIO
1252 && ahc
->bsh
.maddr
!= NULL
) {
1253 iounmap(ahc
->bsh
.maddr
);
1254 release_mem_region(ahc
->platform_data
->mem_busaddr
,
1258 if (ahc
->platform_data
->host
)
1259 scsi_host_put(ahc
->platform_data
->host
);
1261 kfree(ahc
->platform_data
);
1266 ahc_platform_freeze_devq(struct ahc_softc
*ahc
, struct scb
*scb
)
1268 ahc_platform_abort_scbs(ahc
, SCB_GET_TARGET(ahc
, scb
),
1269 SCB_GET_CHANNEL(ahc
, scb
),
1270 SCB_GET_LUN(scb
), SCB_LIST_NULL
,
1271 ROLE_UNKNOWN
, CAM_REQUEUE_REQ
);
1275 ahc_platform_set_tags(struct ahc_softc
*ahc
, struct scsi_device
*sdev
,
1276 struct ahc_devinfo
*devinfo
, ahc_queue_alg alg
)
1278 struct ahc_linux_device
*dev
;
1284 dev
= scsi_transport_device_data(sdev
);
1286 was_queuing
= dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
);
1289 case AHC_QUEUE_NONE
:
1292 case AHC_QUEUE_BASIC
:
1293 now_queuing
= AHC_DEV_Q_BASIC
;
1295 case AHC_QUEUE_TAGGED
:
1296 now_queuing
= AHC_DEV_Q_TAGGED
;
1299 if ((dev
->flags
& AHC_DEV_FREEZE_TIL_EMPTY
) == 0
1300 && (was_queuing
!= now_queuing
)
1301 && (dev
->active
!= 0)) {
1302 dev
->flags
|= AHC_DEV_FREEZE_TIL_EMPTY
;
1306 dev
->flags
&= ~(AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
|AHC_DEV_PERIODIC_OTAG
);
1310 usertags
= ahc_linux_user_tagdepth(ahc
, devinfo
);
1313 * Start out aggressively and allow our
1314 * dynamic queue depth algorithm to take
1317 dev
->maxtags
= usertags
;
1318 dev
->openings
= dev
->maxtags
- dev
->active
;
1320 if (dev
->maxtags
== 0) {
1322 * Queueing is disabled by the user.
1325 } else if (alg
== AHC_QUEUE_TAGGED
) {
1326 dev
->flags
|= AHC_DEV_Q_TAGGED
;
1327 if (aic7xxx_periodic_otag
!= 0)
1328 dev
->flags
|= AHC_DEV_PERIODIC_OTAG
;
1330 dev
->flags
|= AHC_DEV_Q_BASIC
;
1332 /* We can only have one opening. */
1334 dev
->openings
= 1 - dev
->active
;
1336 switch ((dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
))) {
1337 case AHC_DEV_Q_BASIC
:
1338 case AHC_DEV_Q_TAGGED
:
1339 scsi_adjust_queue_depth(sdev
,
1340 dev
->openings
+ dev
->active
);
1343 * We allow the OS to queue 2 untagged transactions to
1344 * us at any time even though we can only execute them
1345 * serially on the controller/device. This should
1346 * remove some latency.
1348 scsi_adjust_queue_depth(sdev
, 2);
1354 ahc_platform_abort_scbs(struct ahc_softc
*ahc
, int target
, char channel
,
1355 int lun
, u_int tag
, role_t role
, uint32_t status
)
1361 ahc_linux_user_tagdepth(struct ahc_softc
*ahc
, struct ahc_devinfo
*devinfo
)
1363 static int warned_user
;
1367 if ((ahc
->user_discenable
& devinfo
->target_mask
) != 0) {
1368 if (ahc
->unit
>= ARRAY_SIZE(aic7xxx_tag_info
)) {
1369 if (warned_user
== 0) {
1372 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1373 "aic7xxx: for installed controllers. Using defaults\n"
1374 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1375 "aic7xxx: the aic7xxx_osm..c source file.\n");
1378 tags
= AHC_MAX_QUEUE
;
1380 adapter_tag_info_t
*tag_info
;
1382 tag_info
= &aic7xxx_tag_info
[ahc
->unit
];
1383 tags
= tag_info
->tag_commands
[devinfo
->target_offset
];
1384 if (tags
> AHC_MAX_QUEUE
)
1385 tags
= AHC_MAX_QUEUE
;
1392 * Determines the queue depth for a given device.
1395 ahc_linux_device_queue_depth(struct scsi_device
*sdev
)
1397 struct ahc_devinfo devinfo
;
1399 struct ahc_softc
*ahc
= *((struct ahc_softc
**)sdev
->host
->hostdata
);
1401 ahc_compile_devinfo(&devinfo
,
1402 sdev
->sdev_target
->channel
== 0
1403 ? ahc
->our_id
: ahc
->our_id_b
,
1404 sdev
->sdev_target
->id
, sdev
->lun
,
1405 sdev
->sdev_target
->channel
== 0 ? 'A' : 'B',
1407 tags
= ahc_linux_user_tagdepth(ahc
, &devinfo
);
1408 if (tags
!= 0 && sdev
->tagged_supported
!= 0) {
1410 ahc_platform_set_tags(ahc
, sdev
, &devinfo
, AHC_QUEUE_TAGGED
);
1411 ahc_send_async(ahc
, devinfo
.channel
, devinfo
.target
,
1412 devinfo
.lun
, AC_TRANSFER_NEG
);
1413 ahc_print_devinfo(ahc
, &devinfo
);
1414 printk("Tagged Queuing enabled. Depth %d\n", tags
);
1416 ahc_platform_set_tags(ahc
, sdev
, &devinfo
, AHC_QUEUE_NONE
);
1417 ahc_send_async(ahc
, devinfo
.channel
, devinfo
.target
,
1418 devinfo
.lun
, AC_TRANSFER_NEG
);
1423 ahc_linux_run_command(struct ahc_softc
*ahc
, struct ahc_linux_device
*dev
,
1424 struct scsi_cmnd
*cmd
)
1427 struct hardware_scb
*hscb
;
1428 struct ahc_initiator_tinfo
*tinfo
;
1429 struct ahc_tmode_tstate
*tstate
;
1431 struct scb_tailq
*untagged_q
= NULL
;
1435 * Schedule us to run later. The only reason we are not
1436 * running is because the whole controller Q is frozen.
1438 if (ahc
->platform_data
->qfrozen
!= 0)
1439 return SCSI_MLQUEUE_HOST_BUSY
;
1442 * We only allow one untagged transaction
1443 * per target in the initiator role unless
1444 * we are storing a full busy target *lun*
1445 * table in SCB space.
1447 if (!(cmd
->flags
& SCMD_TAGGED
)
1448 && (ahc
->features
& AHC_SCB_BTT
) == 0) {
1451 target_offset
= cmd
->device
->id
+ cmd
->device
->channel
* 8;
1452 untagged_q
= &(ahc
->untagged_queues
[target_offset
]);
1453 if (!TAILQ_EMPTY(untagged_q
))
1454 /* if we're already executing an untagged command
1455 * we're busy to another */
1456 return SCSI_MLQUEUE_DEVICE_BUSY
;
1459 nseg
= scsi_dma_map(cmd
);
1461 return SCSI_MLQUEUE_HOST_BUSY
;
1464 * Get an scb to use.
1466 scb
= ahc_get_scb(ahc
);
1468 scsi_dma_unmap(cmd
);
1469 return SCSI_MLQUEUE_HOST_BUSY
;
1473 scb
->platform_data
->dev
= dev
;
1475 cmd
->host_scribble
= (char *)scb
;
1478 * Fill out basics of the HSCB.
1481 hscb
->scsiid
= BUILD_SCSIID(ahc
, cmd
);
1482 hscb
->lun
= cmd
->device
->lun
;
1483 mask
= SCB_GET_TARGET_MASK(ahc
, scb
);
1484 tinfo
= ahc_fetch_transinfo(ahc
, SCB_GET_CHANNEL(ahc
, scb
),
1485 SCB_GET_OUR_ID(scb
),
1486 SCB_GET_TARGET(ahc
, scb
), &tstate
);
1487 hscb
->scsirate
= tinfo
->scsirate
;
1488 hscb
->scsioffset
= tinfo
->curr
.offset
;
1489 if ((tstate
->ultraenb
& mask
) != 0)
1490 hscb
->control
|= ULTRAENB
;
1492 if ((ahc
->user_discenable
& mask
) != 0)
1493 hscb
->control
|= DISCENB
;
1495 if ((tstate
->auto_negotiate
& mask
) != 0) {
1496 scb
->flags
|= SCB_AUTO_NEGOTIATE
;
1497 scb
->hscb
->control
|= MK_MESSAGE
;
1500 if ((dev
->flags
& (AHC_DEV_Q_TAGGED
|AHC_DEV_Q_BASIC
)) != 0) {
1501 if (dev
->commands_since_idle_or_otag
== AHC_OTAG_THRESH
1502 && (dev
->flags
& AHC_DEV_Q_TAGGED
) != 0) {
1503 hscb
->control
|= MSG_ORDERED_TASK
;
1504 dev
->commands_since_idle_or_otag
= 0;
1506 hscb
->control
|= MSG_SIMPLE_TASK
;
1510 hscb
->cdb_len
= cmd
->cmd_len
;
1511 if (hscb
->cdb_len
<= 12) {
1512 memcpy(hscb
->shared_data
.cdb
, cmd
->cmnd
, hscb
->cdb_len
);
1514 memcpy(hscb
->cdb32
, cmd
->cmnd
, hscb
->cdb_len
);
1515 scb
->flags
|= SCB_CDB32_PTR
;
1518 scb
->platform_data
->xfer_len
= 0;
1519 ahc_set_residual(scb
, 0);
1520 ahc_set_sense_residual(scb
, 0);
1524 struct ahc_dma_seg
*sg
;
1525 struct scatterlist
*cur_seg
;
1528 /* Copy the segments into the SG list. */
1531 * The sg_count may be larger than nseg if
1532 * a transfer crosses a 32bit page.
1534 scsi_for_each_sg(cmd
, cur_seg
, nseg
, i
) {
1539 addr
= sg_dma_address(cur_seg
);
1540 len
= sg_dma_len(cur_seg
);
1541 consumed
= ahc_linux_map_seg(ahc
, scb
,
1544 scb
->sg_count
+= consumed
;
1547 sg
->len
|= ahc_htole32(AHC_DMA_LAST_SEG
);
1550 * Reset the sg list pointer.
1553 ahc_htole32(scb
->sg_list_phys
| SG_FULL_RESID
);
1556 * Copy the first SG into the "current"
1557 * data pointer area.
1559 scb
->hscb
->dataptr
= scb
->sg_list
->addr
;
1560 scb
->hscb
->datacnt
= scb
->sg_list
->len
;
1562 scb
->hscb
->sgptr
= ahc_htole32(SG_LIST_NULL
);
1563 scb
->hscb
->dataptr
= 0;
1564 scb
->hscb
->datacnt
= 0;
1568 LIST_INSERT_HEAD(&ahc
->pending_scbs
, scb
, pending_links
);
1571 dev
->commands_issued
++;
1572 if ((dev
->flags
& AHC_DEV_PERIODIC_OTAG
) != 0)
1573 dev
->commands_since_idle_or_otag
++;
1575 scb
->flags
|= SCB_ACTIVE
;
1577 TAILQ_INSERT_TAIL(untagged_q
, scb
, links
.tqe
);
1578 scb
->flags
|= SCB_UNTAGGEDQ
;
1580 ahc_queue_scb(ahc
, scb
);
1585 * SCSI controller interrupt handler.
1588 ahc_linux_isr(int irq
, void *dev_id
)
1590 struct ahc_softc
*ahc
;
1594 ahc
= (struct ahc_softc
*) dev_id
;
1595 ahc_lock(ahc
, &flags
);
1596 ours
= ahc_intr(ahc
);
1597 ahc_unlock(ahc
, &flags
);
1598 return IRQ_RETVAL(ours
);
1602 ahc_platform_flushwork(struct ahc_softc
*ahc
)
1608 ahc_send_async(struct ahc_softc
*ahc
, char channel
,
1609 u_int target
, u_int lun
, ac_code code
)
1612 case AC_TRANSFER_NEG
:
1614 struct scsi_target
*starget
;
1615 struct ahc_linux_target
*targ
;
1616 struct ahc_initiator_tinfo
*tinfo
;
1617 struct ahc_tmode_tstate
*tstate
;
1619 unsigned int target_ppr_options
;
1621 BUG_ON(target
== CAM_TARGET_WILDCARD
);
1623 tinfo
= ahc_fetch_transinfo(ahc
, channel
,
1624 channel
== 'A' ? ahc
->our_id
1629 * Don't bother reporting results while
1630 * negotiations are still pending.
1632 if (tinfo
->curr
.period
!= tinfo
->goal
.period
1633 || tinfo
->curr
.width
!= tinfo
->goal
.width
1634 || tinfo
->curr
.offset
!= tinfo
->goal
.offset
1635 || tinfo
->curr
.ppr_options
!= tinfo
->goal
.ppr_options
)
1636 if (bootverbose
== 0)
1640 * Don't bother reporting results that
1641 * are identical to those last reported.
1643 target_offset
= target
;
1646 starget
= ahc
->platform_data
->starget
[target_offset
];
1647 if (starget
== NULL
)
1649 targ
= scsi_transport_target_data(starget
);
1651 target_ppr_options
=
1652 (spi_dt(starget
) ? MSG_EXT_PPR_DT_REQ
: 0)
1653 + (spi_qas(starget
) ? MSG_EXT_PPR_QAS_REQ
: 0)
1654 + (spi_iu(starget
) ? MSG_EXT_PPR_IU_REQ
: 0);
1656 if (tinfo
->curr
.period
== spi_period(starget
)
1657 && tinfo
->curr
.width
== spi_width(starget
)
1658 && tinfo
->curr
.offset
== spi_offset(starget
)
1659 && tinfo
->curr
.ppr_options
== target_ppr_options
)
1660 if (bootverbose
== 0)
1663 spi_period(starget
) = tinfo
->curr
.period
;
1664 spi_width(starget
) = tinfo
->curr
.width
;
1665 spi_offset(starget
) = tinfo
->curr
.offset
;
1666 spi_dt(starget
) = tinfo
->curr
.ppr_options
& MSG_EXT_PPR_DT_REQ
? 1 : 0;
1667 spi_qas(starget
) = tinfo
->curr
.ppr_options
& MSG_EXT_PPR_QAS_REQ
? 1 : 0;
1668 spi_iu(starget
) = tinfo
->curr
.ppr_options
& MSG_EXT_PPR_IU_REQ
? 1 : 0;
1669 spi_display_xfer_agreement(starget
);
1674 WARN_ON(lun
!= CAM_LUN_WILDCARD
);
1675 scsi_report_device_reset(ahc
->platform_data
->host
,
1676 channel
- 'A', target
);
1680 if (ahc
->platform_data
->host
!= NULL
) {
1681 scsi_report_bus_reset(ahc
->platform_data
->host
,
1686 panic("ahc_send_async: Unexpected async event");
1691 * Calls the higher level scsi done function and frees the scb.
1694 ahc_done(struct ahc_softc
*ahc
, struct scb
*scb
)
1696 struct scsi_cmnd
*cmd
;
1697 struct ahc_linux_device
*dev
;
1699 LIST_REMOVE(scb
, pending_links
);
1700 if ((scb
->flags
& SCB_UNTAGGEDQ
) != 0) {
1701 struct scb_tailq
*untagged_q
;
1704 target_offset
= SCB_GET_TARGET_OFFSET(ahc
, scb
);
1705 untagged_q
= &(ahc
->untagged_queues
[target_offset
]);
1706 TAILQ_REMOVE(untagged_q
, scb
, links
.tqe
);
1707 BUG_ON(!TAILQ_EMPTY(untagged_q
));
1708 } else if ((scb
->flags
& SCB_ACTIVE
) == 0) {
1710 * Transactions aborted from the untagged queue may
1711 * not have been dispatched to the controller, so
1712 * only check the SCB_ACTIVE flag for tagged transactions.
1714 printk("SCB %d done'd twice\n", scb
->hscb
->tag
);
1715 ahc_dump_card_state(ahc
);
1716 panic("Stopping for safety");
1719 dev
= scb
->platform_data
->dev
;
1722 if ((cmd
->result
& (CAM_DEV_QFRZN
<< 16)) != 0) {
1723 cmd
->result
&= ~(CAM_DEV_QFRZN
<< 16);
1726 ahc_linux_unmap_scb(ahc
, scb
);
1729 * Guard against stale sense data.
1730 * The Linux mid-layer assumes that sense
1731 * was retrieved anytime the first byte of
1732 * the sense buffer looks "sane".
1734 cmd
->sense_buffer
[0] = 0;
1735 if (ahc_get_transaction_status(scb
) == CAM_REQ_INPROG
) {
1736 uint32_t amount_xferred
;
1739 ahc_get_transfer_length(scb
) - ahc_get_residual(scb
);
1740 if ((scb
->flags
& SCB_TRANSMISSION_ERROR
) != 0) {
1742 if ((ahc_debug
& AHC_SHOW_MISC
) != 0) {
1743 ahc_print_path(ahc
, scb
);
1744 printk("Set CAM_UNCOR_PARITY\n");
1747 ahc_set_transaction_status(scb
, CAM_UNCOR_PARITY
);
1748 #ifdef AHC_REPORT_UNDERFLOWS
1750 * This code is disabled by default as some
1751 * clients of the SCSI system do not properly
1752 * initialize the underflow parameter. This
1753 * results in spurious termination of commands
1754 * that complete as expected (e.g. underflow is
1755 * allowed as command can return variable amounts
1758 } else if (amount_xferred
< scb
->io_ctx
->underflow
) {
1761 ahc_print_path(ahc
, scb
);
1763 for (i
= 0; i
< scb
->io_ctx
->cmd_len
; i
++)
1764 printk(" 0x%x", scb
->io_ctx
->cmnd
[i
]);
1766 ahc_print_path(ahc
, scb
);
1767 printk("Saw underflow (%ld of %ld bytes). "
1768 "Treated as error\n",
1769 ahc_get_residual(scb
),
1770 ahc_get_transfer_length(scb
));
1771 ahc_set_transaction_status(scb
, CAM_DATA_RUN_ERR
);
1774 ahc_set_transaction_status(scb
, CAM_REQ_CMP
);
1776 } else if (ahc_get_transaction_status(scb
) == CAM_SCSI_STATUS_ERROR
) {
1777 ahc_linux_handle_scsi_status(ahc
, cmd
->device
, scb
);
1780 if (dev
->openings
== 1
1781 && ahc_get_transaction_status(scb
) == CAM_REQ_CMP
1782 && ahc_get_scsi_status(scb
) != SCSI_STATUS_QUEUE_FULL
)
1783 dev
->tag_success_count
++;
1785 * Some devices deal with temporary internal resource
1786 * shortages by returning queue full. When the queue
1787 * full occurrs, we throttle back. Slowly try to get
1788 * back to our previous queue depth.
1790 if ((dev
->openings
+ dev
->active
) < dev
->maxtags
1791 && dev
->tag_success_count
> AHC_TAG_SUCCESS_INTERVAL
) {
1792 dev
->tag_success_count
= 0;
1796 if (dev
->active
== 0)
1797 dev
->commands_since_idle_or_otag
= 0;
1799 if ((scb
->flags
& SCB_RECOVERY_SCB
) != 0) {
1800 printk("Recovery SCB completes\n");
1801 if (ahc_get_transaction_status(scb
) == CAM_BDR_SENT
1802 || ahc_get_transaction_status(scb
) == CAM_REQ_ABORTED
)
1803 ahc_set_transaction_status(scb
, CAM_CMD_TIMEOUT
);
1805 if (ahc
->platform_data
->eh_done
)
1806 complete(ahc
->platform_data
->eh_done
);
1809 ahc_free_scb(ahc
, scb
);
1810 ahc_linux_queue_cmd_complete(ahc
, cmd
);
1814 ahc_linux_handle_scsi_status(struct ahc_softc
*ahc
,
1815 struct scsi_device
*sdev
, struct scb
*scb
)
1817 struct ahc_devinfo devinfo
;
1818 struct ahc_linux_device
*dev
= scsi_transport_device_data(sdev
);
1820 ahc_compile_devinfo(&devinfo
,
1822 sdev
->sdev_target
->id
, sdev
->lun
,
1823 sdev
->sdev_target
->channel
== 0 ? 'A' : 'B',
1827 * We don't currently trust the mid-layer to
1828 * properly deal with queue full or busy. So,
1829 * when one occurs, we tell the mid-layer to
1830 * unconditionally requeue the command to us
1831 * so that we can retry it ourselves. We also
1832 * implement our own throttling mechanism so
1833 * we don't clobber the device with too many
1836 switch (ahc_get_scsi_status(scb
)) {
1839 case SCSI_STATUS_CHECK_COND
:
1840 case SCSI_STATUS_CMD_TERMINATED
:
1842 struct scsi_cmnd
*cmd
;
1845 * Copy sense information to the OS's cmd
1846 * structure if it is available.
1849 if (scb
->flags
& SCB_SENSE
) {
1852 sense_size
= min(sizeof(struct scsi_sense_data
)
1853 - ahc_get_sense_residual(scb
),
1854 (u_long
)SCSI_SENSE_BUFFERSIZE
);
1855 memcpy(cmd
->sense_buffer
,
1856 ahc_get_sense_buf(ahc
, scb
), sense_size
);
1857 if (sense_size
< SCSI_SENSE_BUFFERSIZE
)
1858 memset(&cmd
->sense_buffer
[sense_size
], 0,
1859 SCSI_SENSE_BUFFERSIZE
- sense_size
);
1860 cmd
->result
|= (DRIVER_SENSE
<< 24);
1862 if (ahc_debug
& AHC_SHOW_SENSE
) {
1865 printk("Copied %d bytes of sense data:",
1867 for (i
= 0; i
< sense_size
; i
++) {
1870 printk("0x%x ", cmd
->sense_buffer
[i
]);
1878 case SCSI_STATUS_QUEUE_FULL
:
1881 * By the time the core driver has returned this
1882 * command, all other commands that were queued
1883 * to us but not the device have been returned.
1884 * This ensures that dev->active is equal to
1885 * the number of commands actually queued to
1888 dev
->tag_success_count
= 0;
1889 if (dev
->active
!= 0) {
1891 * Drop our opening count to the number
1892 * of commands currently outstanding.
1896 ahc_print_path(ahc, scb);
1897 printk("Dropping tag count to %d\n", dev->active);
1899 if (dev
->active
== dev
->tags_on_last_queuefull
) {
1901 dev
->last_queuefull_same_count
++;
1903 * If we repeatedly see a queue full
1904 * at the same queue depth, this
1905 * device has a fixed number of tag
1906 * slots. Lock in this tag depth
1907 * so we stop seeing queue fulls from
1910 if (dev
->last_queuefull_same_count
1911 == AHC_LOCK_TAGS_COUNT
) {
1912 dev
->maxtags
= dev
->active
;
1913 ahc_print_path(ahc
, scb
);
1914 printk("Locking max tag count at %d\n",
1918 dev
->tags_on_last_queuefull
= dev
->active
;
1919 dev
->last_queuefull_same_count
= 0;
1921 ahc_set_transaction_status(scb
, CAM_REQUEUE_REQ
);
1922 ahc_set_scsi_status(scb
, SCSI_STATUS_OK
);
1923 ahc_platform_set_tags(ahc
, sdev
, &devinfo
,
1924 (dev
->flags
& AHC_DEV_Q_BASIC
)
1925 ? AHC_QUEUE_BASIC
: AHC_QUEUE_TAGGED
);
1929 * Drop down to a single opening, and treat this
1930 * as if the target returned BUSY SCSI status.
1933 ahc_set_scsi_status(scb
, SCSI_STATUS_BUSY
);
1934 ahc_platform_set_tags(ahc
, sdev
, &devinfo
,
1935 (dev
->flags
& AHC_DEV_Q_BASIC
)
1936 ? AHC_QUEUE_BASIC
: AHC_QUEUE_TAGGED
);
1943 ahc_linux_queue_cmd_complete(struct ahc_softc
*ahc
, struct scsi_cmnd
*cmd
)
1946 * Map CAM error codes into Linux Error codes. We
1947 * avoid the conversion so that the DV code has the
1948 * full error information available when making
1949 * state change decisions.
1954 switch (ahc_cmd_get_transaction_status(cmd
)) {
1955 case CAM_REQ_INPROG
:
1957 case CAM_SCSI_STATUS_ERROR
:
1958 new_status
= DID_OK
;
1960 case CAM_REQ_ABORTED
:
1961 new_status
= DID_ABORT
;
1964 new_status
= DID_BUS_BUSY
;
1966 case CAM_REQ_INVALID
:
1967 case CAM_PATH_INVALID
:
1968 new_status
= DID_BAD_TARGET
;
1970 case CAM_SEL_TIMEOUT
:
1971 new_status
= DID_NO_CONNECT
;
1973 case CAM_SCSI_BUS_RESET
:
1975 new_status
= DID_RESET
;
1977 case CAM_UNCOR_PARITY
:
1978 new_status
= DID_PARITY
;
1980 case CAM_CMD_TIMEOUT
:
1981 new_status
= DID_TIME_OUT
;
1984 case CAM_REQ_CMP_ERR
:
1985 case CAM_AUTOSENSE_FAIL
:
1987 case CAM_DATA_RUN_ERR
:
1988 case CAM_UNEXP_BUSFREE
:
1989 case CAM_SEQUENCE_FAIL
:
1990 case CAM_CCB_LEN_ERR
:
1991 case CAM_PROVIDE_FAIL
:
1992 case CAM_REQ_TERMIO
:
1993 case CAM_UNREC_HBA_ERROR
:
1994 case CAM_REQ_TOO_BIG
:
1995 new_status
= DID_ERROR
;
1997 case CAM_REQUEUE_REQ
:
1998 new_status
= DID_REQUEUE
;
2001 /* We should never get here */
2002 new_status
= DID_ERROR
;
2006 ahc_cmd_set_transaction_status(cmd
, new_status
);
2009 cmd
->scsi_done(cmd
);
2013 ahc_linux_freeze_simq(struct ahc_softc
*ahc
)
2018 ahc
->platform_data
->qfrozen
++;
2019 if (ahc
->platform_data
->qfrozen
== 1) {
2020 scsi_block_requests(ahc
->platform_data
->host
);
2022 /* XXX What about Twin channels? */
2023 ahc_platform_abort_scbs(ahc
, CAM_TARGET_WILDCARD
, ALL_CHANNELS
,
2024 CAM_LUN_WILDCARD
, SCB_LIST_NULL
,
2025 ROLE_INITIATOR
, CAM_REQUEUE_REQ
);
2027 ahc_unlock(ahc
, &s
);
2031 ahc_linux_release_simq(struct ahc_softc
*ahc
)
2038 if (ahc
->platform_data
->qfrozen
> 0)
2039 ahc
->platform_data
->qfrozen
--;
2040 if (ahc
->platform_data
->qfrozen
== 0)
2042 ahc_unlock(ahc
, &s
);
2044 * There is still a race here. The mid-layer
2045 * should keep its own freeze count and use
2046 * a bottom half handler to run the queues
2047 * so we can unblock with our own lock held.
2050 scsi_unblock_requests(ahc
->platform_data
->host
);
2054 ahc_linux_queue_recovery_cmd(struct scsi_cmnd
*cmd
, scb_flag flag
)
2056 struct ahc_softc
*ahc
;
2057 struct ahc_linux_device
*dev
;
2058 struct scb
*pending_scb
;
2060 u_int active_scb_index
;
2069 unsigned long flags
;
2074 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
2076 scmd_printk(KERN_INFO
, cmd
, "Attempting to queue a%s message\n",
2077 flag
== SCB_ABORT
? "n ABORT" : " TARGET RESET");
2080 for (cdb_byte
= 0; cdb_byte
< cmd
->cmd_len
; cdb_byte
++)
2081 printk(" 0x%x", cmd
->cmnd
[cdb_byte
]);
2084 ahc_lock(ahc
, &flags
);
2087 * First determine if we currently own this command.
2088 * Start by searching the device queue. If not found
2089 * there, check the pending_scb list. If not found
2090 * at all, and the system wanted us to just abort the
2091 * command, return success.
2093 dev
= scsi_transport_device_data(cmd
->device
);
2097 * No target device for this command exists,
2098 * so we must not still own the command.
2100 printk("%s:%d:%d:%d: Is not an active device\n",
2101 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
2102 (u8
)cmd
->device
->lun
);
2107 if ((dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
)) == 0
2108 && ahc_search_untagged_queues(ahc
, cmd
, cmd
->device
->id
,
2109 cmd
->device
->channel
+ 'A',
2110 (u8
)cmd
->device
->lun
,
2111 CAM_REQ_ABORTED
, SEARCH_COMPLETE
) != 0) {
2112 printk("%s:%d:%d:%d: Command found on untagged queue\n",
2113 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
2114 (u8
)cmd
->device
->lun
);
2120 * See if we can find a matching cmd in the pending list.
2122 LIST_FOREACH(pending_scb
, &ahc
->pending_scbs
, pending_links
) {
2123 if (pending_scb
->io_ctx
== cmd
)
2127 if (pending_scb
== NULL
&& flag
== SCB_DEVICE_RESET
) {
2129 /* Any SCB for this device will do for a target reset */
2130 LIST_FOREACH(pending_scb
, &ahc
->pending_scbs
, pending_links
) {
2131 if (ahc_match_scb(ahc
, pending_scb
, scmd_id(cmd
),
2132 scmd_channel(cmd
) + 'A',
2134 SCB_LIST_NULL
, ROLE_INITIATOR
))
2139 if (pending_scb
== NULL
) {
2140 scmd_printk(KERN_INFO
, cmd
, "Command not found\n");
2144 if ((pending_scb
->flags
& SCB_RECOVERY_SCB
) != 0) {
2146 * We can't queue two recovery actions using the same SCB
2153 * Ensure that the card doesn't do anything
2154 * behind our back and that we didn't "just" miss
2155 * an interrupt that would affect this cmd.
2157 was_paused
= ahc_is_paused(ahc
);
2158 ahc_pause_and_flushwork(ahc
);
2161 if ((pending_scb
->flags
& SCB_ACTIVE
) == 0) {
2162 scmd_printk(KERN_INFO
, cmd
, "Command already completed\n");
2166 printk("%s: At time of recovery, card was %spaused\n",
2167 ahc_name(ahc
), was_paused
? "" : "not ");
2168 ahc_dump_card_state(ahc
);
2170 disconnected
= TRUE
;
2171 if (flag
== SCB_ABORT
) {
2172 if (ahc_search_qinfifo(ahc
, cmd
->device
->id
,
2173 cmd
->device
->channel
+ 'A',
2175 pending_scb
->hscb
->tag
,
2176 ROLE_INITIATOR
, CAM_REQ_ABORTED
,
2177 SEARCH_COMPLETE
) > 0) {
2178 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2179 ahc_name(ahc
), cmd
->device
->channel
,
2180 cmd
->device
->id
, (u8
)cmd
->device
->lun
);
2184 } else if (ahc_search_qinfifo(ahc
, cmd
->device
->id
,
2185 cmd
->device
->channel
+ 'A',
2187 pending_scb
->hscb
->tag
,
2188 ROLE_INITIATOR
, /*status*/0,
2189 SEARCH_COUNT
) > 0) {
2190 disconnected
= FALSE
;
2193 if (disconnected
&& (ahc_inb(ahc
, SEQ_FLAGS
) & NOT_IDENTIFIED
) == 0) {
2194 struct scb
*bus_scb
;
2196 bus_scb
= ahc_lookup_scb(ahc
, ahc_inb(ahc
, SCB_TAG
));
2197 if (bus_scb
== pending_scb
)
2198 disconnected
= FALSE
;
2199 else if (flag
!= SCB_ABORT
2200 && ahc_inb(ahc
, SAVED_SCSIID
) == pending_scb
->hscb
->scsiid
2201 && ahc_inb(ahc
, SAVED_LUN
) == SCB_GET_LUN(pending_scb
))
2202 disconnected
= FALSE
;
2206 * At this point, pending_scb is the scb associated with the
2207 * passed in command. That command is currently active on the
2208 * bus, is in the disconnected state, or we're hoping to find
2209 * a command for the same target active on the bus to abuse to
2210 * send a BDR. Queue the appropriate message based on which of
2211 * these states we are in.
2213 last_phase
= ahc_inb(ahc
, LASTPHASE
);
2214 saved_scbptr
= ahc_inb(ahc
, SCBPTR
);
2215 active_scb_index
= ahc_inb(ahc
, SCB_TAG
);
2216 saved_scsiid
= ahc_inb(ahc
, SAVED_SCSIID
);
2217 if (last_phase
!= P_BUSFREE
2218 && (pending_scb
->hscb
->tag
== active_scb_index
2219 || (flag
== SCB_DEVICE_RESET
2220 && SCSIID_TARGET(ahc
, saved_scsiid
) == scmd_id(cmd
)))) {
2223 * We're active on the bus, so assert ATN
2224 * and hope that the target responds.
2226 pending_scb
= ahc_lookup_scb(ahc
, active_scb_index
);
2227 pending_scb
->flags
|= SCB_RECOVERY_SCB
|flag
;
2228 ahc_outb(ahc
, MSG_OUT
, HOST_MSG
);
2229 ahc_outb(ahc
, SCSISIGO
, last_phase
|ATNO
);
2230 scmd_printk(KERN_INFO
, cmd
, "Device is active, asserting ATN\n");
2232 } else if (disconnected
) {
2235 * Actually re-queue this SCB in an attempt
2236 * to select the device before it reconnects.
2237 * In either case (selection or reselection),
2238 * we will now issue the approprate message
2239 * to the timed-out device.
2241 * Set the MK_MESSAGE control bit indicating
2242 * that we desire to send a message. We
2243 * also set the disconnected flag since
2244 * in the paging case there is no guarantee
2245 * that our SCB control byte matches the
2246 * version on the card. We don't want the
2247 * sequencer to abort the command thinking
2248 * an unsolicited reselection occurred.
2250 pending_scb
->hscb
->control
|= MK_MESSAGE
|DISCONNECTED
;
2251 pending_scb
->flags
|= SCB_RECOVERY_SCB
|flag
;
2254 * Remove any cached copy of this SCB in the
2255 * disconnected list in preparation for the
2256 * queuing of our abort SCB. We use the
2257 * same element in the SCB, SCB_NEXT, for
2258 * both the qinfifo and the disconnected list.
2260 ahc_search_disc_list(ahc
, cmd
->device
->id
,
2261 cmd
->device
->channel
+ 'A',
2262 cmd
->device
->lun
, pending_scb
->hscb
->tag
,
2263 /*stop_on_first*/TRUE
,
2265 /*save_state*/FALSE
);
2268 * In the non-paging case, the sequencer will
2269 * never re-reference the in-core SCB.
2270 * To make sure we are notified during
2271 * reselection, set the MK_MESSAGE flag in
2272 * the card's copy of the SCB.
2274 if ((ahc
->flags
& AHC_PAGESCBS
) == 0) {
2275 ahc_outb(ahc
, SCBPTR
, pending_scb
->hscb
->tag
);
2276 ahc_outb(ahc
, SCB_CONTROL
,
2277 ahc_inb(ahc
, SCB_CONTROL
)|MK_MESSAGE
);
2281 * Clear out any entries in the QINFIFO first
2282 * so we are the next SCB for this target
2285 ahc_search_qinfifo(ahc
, cmd
->device
->id
,
2286 cmd
->device
->channel
+ 'A',
2287 cmd
->device
->lun
, SCB_LIST_NULL
,
2288 ROLE_INITIATOR
, CAM_REQUEUE_REQ
,
2290 ahc_qinfifo_requeue_tail(ahc
, pending_scb
);
2291 ahc_outb(ahc
, SCBPTR
, saved_scbptr
);
2292 ahc_print_path(ahc
, pending_scb
);
2293 printk("Device is disconnected, re-queuing SCB\n");
2296 scmd_printk(KERN_INFO
, cmd
, "Unable to deliver message\n");
2303 * Our assumption is that if we don't have the command, no
2304 * recovery action was required, so we return success. Again,
2305 * the semantics of the mid-layer recovery engine are not
2306 * well defined, so this may change in time.
2313 DECLARE_COMPLETION_ONSTACK(done
);
2315 ahc
->platform_data
->eh_done
= &done
;
2316 ahc_unlock(ahc
, &flags
);
2318 printk("Recovery code sleeping\n");
2319 if (!wait_for_completion_timeout(&done
, 5 * HZ
)) {
2320 ahc_lock(ahc
, &flags
);
2321 ahc
->platform_data
->eh_done
= NULL
;
2322 ahc_unlock(ahc
, &flags
);
2324 printk("Timer Expired\n");
2327 printk("Recovery code awake\n");
2329 ahc_unlock(ahc
, &flags
);
2334 ahc_platform_dump_card_state(struct ahc_softc
*ahc
)
2338 static void ahc_linux_set_width(struct scsi_target
*starget
, int width
)
2340 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2341 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2342 struct ahc_devinfo devinfo
;
2343 unsigned long flags
;
2345 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2346 starget
->channel
+ 'A', ROLE_INITIATOR
);
2347 ahc_lock(ahc
, &flags
);
2348 ahc_set_width(ahc
, &devinfo
, width
, AHC_TRANS_GOAL
, FALSE
);
2349 ahc_unlock(ahc
, &flags
);
2352 static void ahc_linux_set_period(struct scsi_target
*starget
, int period
)
2354 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2355 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2356 struct ahc_tmode_tstate
*tstate
;
2357 struct ahc_initiator_tinfo
*tinfo
2358 = ahc_fetch_transinfo(ahc
,
2359 starget
->channel
+ 'A',
2360 shost
->this_id
, starget
->id
, &tstate
);
2361 struct ahc_devinfo devinfo
;
2362 unsigned int ppr_options
= tinfo
->goal
.ppr_options
;
2363 unsigned long flags
;
2364 unsigned long offset
= tinfo
->goal
.offset
;
2365 const struct ahc_syncrate
*syncrate
;
2368 offset
= MAX_OFFSET
;
2371 period
= 9; /* 12.5ns is our minimum */
2373 if (spi_max_width(starget
))
2374 ppr_options
|= MSG_EXT_PPR_DT_REQ
;
2376 /* need wide for DT and need DT for 12.5 ns */
2380 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2381 starget
->channel
+ 'A', ROLE_INITIATOR
);
2383 /* all PPR requests apart from QAS require wide transfers */
2384 if (ppr_options
& ~MSG_EXT_PPR_QAS_REQ
) {
2385 if (spi_width(starget
) == 0)
2386 ppr_options
&= MSG_EXT_PPR_QAS_REQ
;
2389 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2390 ahc_lock(ahc
, &flags
);
2391 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, offset
,
2392 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2393 ahc_unlock(ahc
, &flags
);
2396 static void ahc_linux_set_offset(struct scsi_target
*starget
, int offset
)
2398 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2399 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2400 struct ahc_tmode_tstate
*tstate
;
2401 struct ahc_initiator_tinfo
*tinfo
2402 = ahc_fetch_transinfo(ahc
,
2403 starget
->channel
+ 'A',
2404 shost
->this_id
, starget
->id
, &tstate
);
2405 struct ahc_devinfo devinfo
;
2406 unsigned int ppr_options
= 0;
2407 unsigned int period
= 0;
2408 unsigned long flags
;
2409 const struct ahc_syncrate
*syncrate
= NULL
;
2411 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2412 starget
->channel
+ 'A', ROLE_INITIATOR
);
2414 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2415 period
= tinfo
->goal
.period
;
2416 ppr_options
= tinfo
->goal
.ppr_options
;
2418 ahc_lock(ahc
, &flags
);
2419 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, offset
,
2420 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2421 ahc_unlock(ahc
, &flags
);
2424 static void ahc_linux_set_dt(struct scsi_target
*starget
, int dt
)
2426 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2427 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2428 struct ahc_tmode_tstate
*tstate
;
2429 struct ahc_initiator_tinfo
*tinfo
2430 = ahc_fetch_transinfo(ahc
,
2431 starget
->channel
+ 'A',
2432 shost
->this_id
, starget
->id
, &tstate
);
2433 struct ahc_devinfo devinfo
;
2434 unsigned int ppr_options
= tinfo
->goal
.ppr_options
2435 & ~MSG_EXT_PPR_DT_REQ
;
2436 unsigned int period
= tinfo
->goal
.period
;
2437 unsigned int width
= tinfo
->goal
.width
;
2438 unsigned long flags
;
2439 const struct ahc_syncrate
*syncrate
;
2441 if (dt
&& spi_max_width(starget
)) {
2442 ppr_options
|= MSG_EXT_PPR_DT_REQ
;
2444 ahc_linux_set_width(starget
, 1);
2445 } else if (period
== 9)
2446 period
= 10; /* if resetting DT, period must be >= 25ns */
2448 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2449 starget
->channel
+ 'A', ROLE_INITIATOR
);
2450 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
,AHC_SYNCRATE_DT
);
2451 ahc_lock(ahc
, &flags
);
2452 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, tinfo
->goal
.offset
,
2453 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2454 ahc_unlock(ahc
, &flags
);
2458 /* FIXME: This code claims to support IU and QAS. However, the actual
2459 * sequencer code and aic7xxx_core have no support for these parameters and
2460 * will get into a bad state if they're negotiated. Do not enable this
2461 * unless you know what you're doing */
2462 static void ahc_linux_set_qas(struct scsi_target
*starget
, int qas
)
2464 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2465 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2466 struct ahc_tmode_tstate
*tstate
;
2467 struct ahc_initiator_tinfo
*tinfo
2468 = ahc_fetch_transinfo(ahc
,
2469 starget
->channel
+ 'A',
2470 shost
->this_id
, starget
->id
, &tstate
);
2471 struct ahc_devinfo devinfo
;
2472 unsigned int ppr_options
= tinfo
->goal
.ppr_options
2473 & ~MSG_EXT_PPR_QAS_REQ
;
2474 unsigned int period
= tinfo
->goal
.period
;
2475 unsigned long flags
;
2476 struct ahc_syncrate
*syncrate
;
2479 ppr_options
|= MSG_EXT_PPR_QAS_REQ
;
2481 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2482 starget
->channel
+ 'A', ROLE_INITIATOR
);
2483 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2484 ahc_lock(ahc
, &flags
);
2485 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, tinfo
->goal
.offset
,
2486 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2487 ahc_unlock(ahc
, &flags
);
2490 static void ahc_linux_set_iu(struct scsi_target
*starget
, int iu
)
2492 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2493 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2494 struct ahc_tmode_tstate
*tstate
;
2495 struct ahc_initiator_tinfo
*tinfo
2496 = ahc_fetch_transinfo(ahc
,
2497 starget
->channel
+ 'A',
2498 shost
->this_id
, starget
->id
, &tstate
);
2499 struct ahc_devinfo devinfo
;
2500 unsigned int ppr_options
= tinfo
->goal
.ppr_options
2501 & ~MSG_EXT_PPR_IU_REQ
;
2502 unsigned int period
= tinfo
->goal
.period
;
2503 unsigned long flags
;
2504 struct ahc_syncrate
*syncrate
;
2507 ppr_options
|= MSG_EXT_PPR_IU_REQ
;
2509 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2510 starget
->channel
+ 'A', ROLE_INITIATOR
);
2511 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2512 ahc_lock(ahc
, &flags
);
2513 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, tinfo
->goal
.offset
,
2514 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2515 ahc_unlock(ahc
, &flags
);
2519 static void ahc_linux_get_signalling(struct Scsi_Host
*shost
)
2521 struct ahc_softc
*ahc
= *(struct ahc_softc
**)shost
->hostdata
;
2522 unsigned long flags
;
2525 if (!(ahc
->features
& AHC_ULTRA2
)) {
2526 /* non-LVD chipset, may not have SBLKCTL reg */
2527 spi_signalling(shost
) =
2528 ahc
->features
& AHC_HVD
?
2534 ahc_lock(ahc
, &flags
);
2536 mode
= ahc_inb(ahc
, SBLKCTL
);
2538 ahc_unlock(ahc
, &flags
);
2541 spi_signalling(shost
) = SPI_SIGNAL_LVD
;
2542 else if (mode
& ENAB20
)
2543 spi_signalling(shost
) = SPI_SIGNAL_SE
;
2545 spi_signalling(shost
) = SPI_SIGNAL_UNKNOWN
;
2548 static struct spi_function_template ahc_linux_transport_functions
= {
2549 .set_offset
= ahc_linux_set_offset
,
2551 .set_period
= ahc_linux_set_period
,
2553 .set_width
= ahc_linux_set_width
,
2555 .set_dt
= ahc_linux_set_dt
,
2558 .set_iu
= ahc_linux_set_iu
,
2560 .set_qas
= ahc_linux_set_qas
,
2563 .get_signalling
= ahc_linux_get_signalling
,
2569 ahc_linux_init(void)
2572 * If we've been passed any parameters, process them now.
2575 aic7xxx_setup(aic7xxx
);
2577 ahc_linux_transport_template
=
2578 spi_attach_transport(&ahc_linux_transport_functions
);
2579 if (!ahc_linux_transport_template
)
2582 scsi_transport_reserve_device(ahc_linux_transport_template
,
2583 sizeof(struct ahc_linux_device
));
2585 ahc_linux_pci_init();
2586 ahc_linux_eisa_init();
2591 ahc_linux_exit(void)
2593 ahc_linux_pci_exit();
2594 ahc_linux_eisa_exit();
2595 spi_release_transport(ahc_linux_transport_template
);
2598 module_init(ahc_linux_init
);
2599 module_exit(ahc_linux_exit
);