2 * Adaptec AIC7xxx device driver for Linux.
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $
6 * Copyright (c) 1994 John Aycock
7 * The University of Calgary Department of Computer Science.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2, or (at your option)
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; see the file COPYING. If not, write to
21 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F
24 * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA
25 * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide,
26 * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux,
27 * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file
28 * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual,
29 * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the
30 * ANSI SCSI-2 specification (draft 10c), ...
32 * --------------------------------------------------------------------------
34 * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org):
36 * Substantially modified to include support for wide and twin bus
37 * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes,
38 * SCB paging, and other rework of the code.
40 * --------------------------------------------------------------------------
41 * Copyright (c) 1994-2000 Justin T. Gibbs.
42 * Copyright (c) 2000-2001 Adaptec Inc.
43 * All rights reserved.
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions, and the following disclaimer,
50 * without modification.
51 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
52 * substantially similar to the "NO WARRANTY" disclaimer below
53 * ("Disclaimer") and any redistribution must be conditioned upon
54 * including a substantially similar Disclaimer requirement for further
55 * binary redistribution.
56 * 3. Neither the names of the above-listed copyright holders nor the names
57 * of any contributors may be used to endorse or promote products derived
58 * from this software without specific prior written permission.
60 * Alternatively, this software may be distributed under the terms of the
61 * GNU General Public License ("GPL") version 2 as published by the Free
62 * Software Foundation.
65 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
66 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
67 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
68 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
69 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
73 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
74 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
75 * POSSIBILITY OF SUCH DAMAGES.
77 *---------------------------------------------------------------------------
79 * Thanks also go to (in alphabetical order) the following:
81 * Rory Bolt - Sequencer bug fixes
82 * Jay Estabrook - Initial DEC Alpha support
83 * Doug Ledford - Much needed abort/reset bug fixes
84 * Kai Makisara - DMAing of SCBs
86 * A Boot time option was also added for not resetting the scsi bus.
88 * Form: aic7xxx=extended
92 * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97
94 * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp
98 * Further driver modifications made by Doug Ledford <dledford@redhat.com>
100 * Copyright (c) 1997-1999 Doug Ledford
102 * These changes are released under the same licensing terms as the FreeBSD
103 * driver written by Justin Gibbs. Please see his Copyright notice above
104 * for the exact terms and conditions covering my changes as well as the
105 * warranty statement.
107 * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include
108 * but are not limited to:
110 * 1: Import of the latest FreeBSD sequencer code for this driver
111 * 2: Modification of kernel code to accommodate different sequencer semantics
112 * 3: Extensive changes throughout kernel portion of driver to improve
113 * abort/reset processing and error hanndling
114 * 4: Other work contributed by various people on the Internet
115 * 5: Changes to printk information and verbosity selection code
116 * 6: General reliability related changes, especially in IRQ management
117 * 7: Modifications to the default probe/attach order for supported cards
118 * 8: SMP friendliness has been improved
122 #include "aic7xxx_osm.h"
123 #include "aic7xxx_inline.h"
124 #include <scsi/scsicam.h>
126 static struct scsi_transport_template
*ahc_linux_transport_template
= NULL
;
128 #include <linux/init.h> /* __setup */
129 #include <linux/mm.h> /* For fetching system memory size */
130 #include <linux/blkdev.h> /* For block_size() */
131 #include <linux/delay.h> /* For ssleep/msleep */
135 * Set this to the delay in seconds after SCSI bus reset.
136 * Note, we honor this only for the initial bus reset.
137 * The scsi error recovery code performs its own bus settle
138 * delay handling for error recovery actions.
140 #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS
141 #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS
143 #define AIC7XXX_RESET_DELAY 5000
147 * Control collection of SCSI transfer statistics for the /proc filesystem.
149 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below.
150 * NOTE: This does affect performance since it has to maintain statistics.
152 #ifdef CONFIG_AIC7XXX_PROC_STATS
153 #define AIC7XXX_PROC_STATS
157 * To change the default number of tagged transactions allowed per-device,
158 * add a line to the lilo.conf file like:
159 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
160 * which will result in the first four devices on the first two
161 * controllers being set to a tagged queue depth of 32.
163 * The tag_commands is an array of 16 to allow for wide and twin adapters.
164 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
168 uint8_t tag_commands
[16]; /* Allow for wide/twin adapters. */
169 } adapter_tag_info_t
;
172 * Modify this as you see fit for your system.
174 * 0 tagged queuing disabled
175 * 1 <= n <= 253 n == max tags ever dispatched.
177 * The driver will throttle the number of commands dispatched to a
178 * device if it returns queue full. For devices with a fixed maximum
179 * queue depth, the driver will eventually determine this depth and
180 * lock it in (a console message is printed to indicate that a lock
181 * has occurred). On some devices, queue full is returned for a temporary
182 * resource shortage. These devices will return queue full at varying
183 * depths. The driver will throttle back when the queue fulls occur and
184 * attempt to slowly increase the depth over time as the device recovers
185 * from the resource shortage.
187 * In this example, the first line will disable tagged queueing for all
188 * the devices on the first probed aic7xxx adapter.
190 * The second line enables tagged queueing with 4 commands/LUN for IDs
191 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
192 * driver to attempt to use up to 64 tags for ID 1.
194 * The third line is the same as the first line.
196 * The fourth line disables tagged queueing for devices 0 and 3. It
197 * enables tagged queueing for the other IDs, with 16 commands/LUN
198 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
199 * IDs 2, 5-7, and 9-15.
203 * NOTE: The below structure is for reference only, the actual structure
204 * to modify in order to change things is just below this comment block.
205 adapter_tag_info_t aic7xxx_tag_info[] =
207 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
208 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
209 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
210 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
214 #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE
215 #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE
217 #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE
220 #define AIC7XXX_CONFIGED_TAG_COMMANDS { \
221 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
222 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
223 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
224 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
225 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
226 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
227 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \
228 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \
232 * By default, use the number of commands specified by
233 * the users kernel configuration.
235 static adapter_tag_info_t aic7xxx_tag_info
[] =
237 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
238 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
239 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
240 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
241 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
242 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
243 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
244 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
245 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
246 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
247 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
248 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
249 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
250 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
251 {AIC7XXX_CONFIGED_TAG_COMMANDS
},
252 {AIC7XXX_CONFIGED_TAG_COMMANDS
}
256 * There should be a specific return value for this in scsi.h, but
257 * it seems that most drivers ignore it.
259 #define DID_UNDERFLOW DID_ERROR
262 ahc_print_path(struct ahc_softc
*ahc
, struct scb
*scb
)
264 printk("(scsi%d:%c:%d:%d): ",
265 ahc
->platform_data
->host
->host_no
,
266 scb
!= NULL
? SCB_GET_CHANNEL(ahc
, scb
) : 'X',
267 scb
!= NULL
? SCB_GET_TARGET(ahc
, scb
) : -1,
268 scb
!= NULL
? SCB_GET_LUN(scb
) : -1);
272 * XXX - these options apply unilaterally to _all_ 274x/284x/294x
273 * cards in the system. This should be fixed. Exceptions to this
274 * rule are noted in the comments.
278 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
279 * has no effect on any later resets that might occur due to things like
282 static uint32_t aic7xxx_no_reset
;
285 * Should we force EXTENDED translation on a controller.
286 * 0 == Use whatever is in the SEEPROM or default to off
287 * 1 == Use whatever is in the SEEPROM or default to on
289 static uint32_t aic7xxx_extended
;
292 * PCI bus parity checking of the Adaptec controllers. This is somewhat
293 * dubious at best. To my knowledge, this option has never actually
294 * solved a PCI parity problem, but on certain machines with broken PCI
295 * chipset configurations where stray PCI transactions with bad parity are
296 * the norm rather than the exception, the error messages can be overwelming.
297 * It's included in the driver for completeness.
298 * 0 = Shut off PCI parity check
299 * non-0 = reverse polarity pci parity checking
301 static uint32_t aic7xxx_pci_parity
= ~0;
304 * There are lots of broken chipsets in the world. Some of them will
305 * violate the PCI spec when we issue byte sized memory writes to our
306 * controller. I/O mapped register access, if allowed by the given
307 * platform, will work in almost all cases.
309 uint32_t aic7xxx_allow_memio
= ~0;
312 * So that we can set how long each device is given as a selection timeout.
313 * The table of values goes like this:
318 * We default to 256ms because some older devices need a longer time
319 * to respond to initial selection.
321 static uint32_t aic7xxx_seltime
;
324 * Certain devices do not perform any aging on commands. Should the
325 * device be saturated by commands in one portion of the disk, it is
326 * possible for transactions on far away sectors to never be serviced.
327 * To handle these devices, we can periodically send an ordered tag to
328 * force all outstanding transactions to be serviced prior to a new
331 uint32_t aic7xxx_periodic_otag
;
334 * Module information and settable options.
336 static char *aic7xxx
= NULL
;
338 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
339 MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver");
340 MODULE_LICENSE("Dual BSD/GPL");
341 MODULE_VERSION(AIC7XXX_DRIVER_VERSION
);
342 module_param(aic7xxx
, charp
, 0444);
343 MODULE_PARM_DESC(aic7xxx
,
344 "period delimited, options string.\n"
345 " verbose Enable verbose/diagnostic logging\n"
346 " allow_memio Allow device registers to be memory mapped\n"
347 " debug Bitmask of debug values to enable\n"
348 " no_probe Toggle EISA/VLB controller probing\n"
349 " probe_eisa_vl Toggle EISA/VLB controller probing\n"
350 " no_reset Supress initial bus resets\n"
351 " extended Enable extended geometry on all controllers\n"
352 " periodic_otag Send an ordered tagged transaction\n"
353 " periodically to prevent tag starvation.\n"
354 " This may be required by some older disk\n"
355 " drives or RAID arrays.\n"
356 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
357 " tag_info:<tag_str> Set per-target tag depth\n"
358 " global_tag_depth:<int> Global tag depth for every target\n"
360 " seltime:<int> Selection Timeout\n"
361 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
363 " Sample /etc/modprobe.conf line:\n"
364 " Toggle EISA/VLB probing\n"
365 " Set tag depth on Controller 1/Target 1 to 10 tags\n"
366 " Shorten the selection timeout to 128ms\n"
368 " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n"
371 static void ahc_linux_handle_scsi_status(struct ahc_softc
*,
372 struct scsi_device
*,
374 static void ahc_linux_queue_cmd_complete(struct ahc_softc
*ahc
,
375 struct scsi_cmnd
*cmd
);
376 static void ahc_linux_freeze_simq(struct ahc_softc
*ahc
);
377 static void ahc_linux_release_simq(struct ahc_softc
*ahc
);
378 static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd
*cmd
, scb_flag flag
);
379 static void ahc_linux_initialize_scsi_bus(struct ahc_softc
*ahc
);
380 static u_int
ahc_linux_user_tagdepth(struct ahc_softc
*ahc
,
381 struct ahc_devinfo
*devinfo
);
382 static void ahc_linux_device_queue_depth(struct scsi_device
*);
383 static int ahc_linux_run_command(struct ahc_softc
*,
384 struct ahc_linux_device
*,
386 static void ahc_linux_setup_tag_info_global(char *p
);
387 static int aic7xxx_setup(char *s
);
389 static int ahc_linux_unit
;
392 /********************************* Inlines ************************************/
393 static __inline
void ahc_linux_unmap_scb(struct ahc_softc
*, struct scb
*);
395 static __inline
int ahc_linux_map_seg(struct ahc_softc
*ahc
, struct scb
*scb
,
396 struct ahc_dma_seg
*sg
,
397 dma_addr_t addr
, bus_size_t len
);
400 ahc_linux_unmap_scb(struct ahc_softc
*ahc
, struct scb
*scb
)
402 struct scsi_cmnd
*cmd
;
405 ahc_sync_sglist(ahc
, scb
, BUS_DMASYNC_POSTWRITE
);
406 if (cmd
->use_sg
!= 0) {
407 struct scatterlist
*sg
;
409 sg
= (struct scatterlist
*)cmd
->request_buffer
;
410 pci_unmap_sg(ahc
->dev_softc
, sg
, cmd
->use_sg
,
411 cmd
->sc_data_direction
);
412 } else if (cmd
->request_bufflen
!= 0) {
413 pci_unmap_single(ahc
->dev_softc
,
414 scb
->platform_data
->buf_busaddr
,
415 cmd
->request_bufflen
,
416 cmd
->sc_data_direction
);
421 ahc_linux_map_seg(struct ahc_softc
*ahc
, struct scb
*scb
,
422 struct ahc_dma_seg
*sg
, dma_addr_t addr
, bus_size_t len
)
426 if ((scb
->sg_count
+ 1) > AHC_NSEG
)
427 panic("Too few segs for dma mapping. "
428 "Increase AHC_NSEG\n");
431 sg
->addr
= ahc_htole32(addr
& 0xFFFFFFFF);
432 scb
->platform_data
->xfer_len
+= len
;
434 if (sizeof(dma_addr_t
) > 4
435 && (ahc
->flags
& AHC_39BIT_ADDRESSING
) != 0)
436 len
|= (addr
>> 8) & AHC_SG_HIGH_ADDR_MASK
;
438 sg
->len
= ahc_htole32(len
);
443 * Return a string describing the driver.
446 ahc_linux_info(struct Scsi_Host
*host
)
448 static char buffer
[512];
451 struct ahc_softc
*ahc
;
454 ahc
= *(struct ahc_softc
**)host
->hostdata
;
455 memset(bp
, 0, sizeof(buffer
));
456 strcpy(bp
, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev ");
457 strcat(bp
, AIC7XXX_DRIVER_VERSION
);
460 strcat(bp
, ahc
->description
);
463 ahc_controller_info(ahc
, ahc_info
);
464 strcat(bp
, ahc_info
);
471 * Queue an SCB to the controller.
474 ahc_linux_queue(struct scsi_cmnd
* cmd
, void (*scsi_done
) (struct scsi_cmnd
*))
476 struct ahc_softc
*ahc
;
477 struct ahc_linux_device
*dev
= scsi_transport_device_data(cmd
->device
);
478 int rtn
= SCSI_MLQUEUE_HOST_BUSY
;
481 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
483 ahc_lock(ahc
, &flags
);
484 if (ahc
->platform_data
->qfrozen
== 0) {
485 cmd
->scsi_done
= scsi_done
;
486 cmd
->result
= CAM_REQ_INPROG
<< 16;
487 rtn
= ahc_linux_run_command(ahc
, dev
, cmd
);
489 ahc_unlock(ahc
, &flags
);
494 static inline struct scsi_target
**
495 ahc_linux_target_in_softc(struct scsi_target
*starget
)
497 struct ahc_softc
*ahc
=
498 *((struct ahc_softc
**)dev_to_shost(&starget
->dev
)->hostdata
);
499 unsigned int target_offset
;
501 target_offset
= starget
->id
;
502 if (starget
->channel
!= 0)
505 return &ahc
->platform_data
->starget
[target_offset
];
509 ahc_linux_target_alloc(struct scsi_target
*starget
)
511 struct ahc_softc
*ahc
=
512 *((struct ahc_softc
**)dev_to_shost(&starget
->dev
)->hostdata
);
513 struct seeprom_config
*sc
= ahc
->seep_config
;
515 struct scsi_target
**ahc_targp
= ahc_linux_target_in_softc(starget
);
516 struct ahc_linux_target
*targ
= scsi_transport_target_data(starget
);
517 unsigned short scsirate
;
518 struct ahc_devinfo devinfo
;
519 struct ahc_initiator_tinfo
*tinfo
;
520 struct ahc_tmode_tstate
*tstate
;
521 char channel
= starget
->channel
+ 'A';
522 unsigned int our_id
= ahc
->our_id
;
523 unsigned int target_offset
;
525 target_offset
= starget
->id
;
526 if (starget
->channel
!= 0)
529 if (starget
->channel
)
530 our_id
= ahc
->our_id_b
;
532 ahc_lock(ahc
, &flags
);
534 BUG_ON(*ahc_targp
!= NULL
);
536 *ahc_targp
= starget
;
537 memset(targ
, 0, sizeof(*targ
));
540 int maxsync
= AHC_SYNCRATE_DT
;
542 int flags
= sc
->device_flags
[target_offset
];
544 if (ahc
->flags
& AHC_NEWEEPROM_FMT
) {
545 if (flags
& CFSYNCHISULTRA
)
547 } else if (flags
& CFULTRAEN
)
549 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04
550 * change it to ultra=0, CFXFER = 0 */
551 if(ultra
&& (flags
& CFXFER
) == 0x04) {
556 if ((ahc
->features
& AHC_ULTRA2
) != 0) {
557 scsirate
= (flags
& CFXFER
) | (ultra
? 0x8 : 0);
559 scsirate
= (flags
& CFXFER
) << 4;
560 maxsync
= ultra
? AHC_SYNCRATE_ULTRA
:
563 spi_max_width(starget
) = (flags
& CFWIDEB
) ? 1 : 0;
564 if (!(flags
& CFSYNCH
))
565 spi_max_offset(starget
) = 0;
566 spi_min_period(starget
) =
567 ahc_find_period(ahc
, scsirate
, maxsync
);
569 tinfo
= ahc_fetch_transinfo(ahc
, channel
, ahc
->our_id
,
570 starget
->id
, &tstate
);
572 ahc_compile_devinfo(&devinfo
, our_id
, starget
->id
,
573 CAM_LUN_WILDCARD
, channel
,
575 ahc_set_syncrate(ahc
, &devinfo
, NULL
, 0, 0, 0,
576 AHC_TRANS_GOAL
, /*paused*/FALSE
);
577 ahc_set_width(ahc
, &devinfo
, MSG_EXT_WDTR_BUS_8_BIT
,
578 AHC_TRANS_GOAL
, /*paused*/FALSE
);
579 ahc_unlock(ahc
, &flags
);
585 ahc_linux_target_destroy(struct scsi_target
*starget
)
587 struct scsi_target
**ahc_targp
= ahc_linux_target_in_softc(starget
);
593 ahc_linux_slave_alloc(struct scsi_device
*sdev
)
595 struct ahc_softc
*ahc
=
596 *((struct ahc_softc
**)sdev
->host
->hostdata
);
597 struct scsi_target
*starget
= sdev
->sdev_target
;
598 struct ahc_linux_target
*targ
= scsi_transport_target_data(starget
);
599 struct ahc_linux_device
*dev
;
602 printf("%s: Slave Alloc %d\n", ahc_name(ahc
), sdev
->id
);
604 BUG_ON(targ
->sdev
[sdev
->lun
] != NULL
);
606 dev
= scsi_transport_device_data(sdev
);
607 memset(dev
, 0, sizeof(*dev
));
610 * We start out life using untagged
611 * transactions of which we allow one.
616 * Set maxtags to 0. This will be changed if we
617 * later determine that we are dealing with
618 * a tagged queuing capable device.
622 targ
->sdev
[sdev
->lun
] = sdev
;
624 spi_period(starget
) = 0;
630 ahc_linux_slave_configure(struct scsi_device
*sdev
)
632 struct ahc_softc
*ahc
;
634 ahc
= *((struct ahc_softc
**)sdev
->host
->hostdata
);
637 sdev_printk(KERN_INFO
, sdev
, "Slave Configure\n");
639 ahc_linux_device_queue_depth(sdev
);
641 /* Initial Domain Validation */
642 if (!spi_initial_dv(sdev
->sdev_target
))
649 ahc_linux_slave_destroy(struct scsi_device
*sdev
)
651 struct ahc_softc
*ahc
;
652 struct ahc_linux_device
*dev
= scsi_transport_device_data(sdev
);
653 struct ahc_linux_target
*targ
= scsi_transport_target_data(sdev
->sdev_target
);
655 ahc
= *((struct ahc_softc
**)sdev
->host
->hostdata
);
657 printf("%s: Slave Destroy %d\n", ahc_name(ahc
), sdev
->id
);
661 targ
->sdev
[sdev
->lun
] = NULL
;
664 #if defined(__i386__)
666 * Return the disk geometry for the given SCSI device.
669 ahc_linux_biosparam(struct scsi_device
*sdev
, struct block_device
*bdev
,
670 sector_t capacity
, int geom
[])
678 struct ahc_softc
*ahc
;
681 ahc
= *((struct ahc_softc
**)sdev
->host
->hostdata
);
682 channel
= sdev_channel(sdev
);
684 bh
= scsi_bios_ptable(bdev
);
686 ret
= scsi_partsize(bh
, capacity
,
687 &geom
[2], &geom
[0], &geom
[1]);
694 cylinders
= aic_sector_div(capacity
, heads
, sectors
);
696 if (aic7xxx_extended
!= 0)
698 else if (channel
== 0)
699 extended
= (ahc
->flags
& AHC_EXTENDED_TRANS_A
) != 0;
701 extended
= (ahc
->flags
& AHC_EXTENDED_TRANS_B
) != 0;
702 if (extended
&& cylinders
>= 1024) {
705 cylinders
= aic_sector_div(capacity
, heads
, sectors
);
715 * Abort the current SCSI command(s).
718 ahc_linux_abort(struct scsi_cmnd
*cmd
)
722 error
= ahc_linux_queue_recovery_cmd(cmd
, SCB_ABORT
);
724 printf("aic7xxx_abort returns 0x%x\n", error
);
729 * Attempt to send a target reset message to the device that timed out.
732 ahc_linux_dev_reset(struct scsi_cmnd
*cmd
)
736 error
= ahc_linux_queue_recovery_cmd(cmd
, SCB_DEVICE_RESET
);
738 printf("aic7xxx_dev_reset returns 0x%x\n", error
);
743 * Reset the SCSI bus.
746 ahc_linux_bus_reset(struct scsi_cmnd
*cmd
)
748 struct ahc_softc
*ahc
;
752 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
754 ahc_lock(ahc
, &flags
);
755 found
= ahc_reset_channel(ahc
, scmd_channel(cmd
) + 'A',
756 /*initiate reset*/TRUE
);
757 ahc_unlock(ahc
, &flags
);
760 printf("%s: SCSI bus reset delivered. "
761 "%d SCBs aborted.\n", ahc_name(ahc
), found
);
766 struct scsi_host_template aic7xxx_driver_template
= {
767 .module
= THIS_MODULE
,
769 .proc_name
= "aic7xxx",
770 .proc_info
= ahc_linux_proc_info
,
771 .info
= ahc_linux_info
,
772 .queuecommand
= ahc_linux_queue
,
773 .eh_abort_handler
= ahc_linux_abort
,
774 .eh_device_reset_handler
= ahc_linux_dev_reset
,
775 .eh_bus_reset_handler
= ahc_linux_bus_reset
,
776 #if defined(__i386__)
777 .bios_param
= ahc_linux_biosparam
,
779 .can_queue
= AHC_MAX_QUEUE
,
782 .use_clustering
= ENABLE_CLUSTERING
,
783 .slave_alloc
= ahc_linux_slave_alloc
,
784 .slave_configure
= ahc_linux_slave_configure
,
785 .slave_destroy
= ahc_linux_slave_destroy
,
786 .target_alloc
= ahc_linux_target_alloc
,
787 .target_destroy
= ahc_linux_target_destroy
,
790 /**************************** Tasklet Handler *********************************/
792 /******************************** Macros **************************************/
793 #define BUILD_SCSIID(ahc, cmd) \
794 ((((cmd)->device->id << TID_SHIFT) & TID) \
795 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \
796 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB))
798 /******************************** Bus DMA *************************************/
800 ahc_dma_tag_create(struct ahc_softc
*ahc
, bus_dma_tag_t parent
,
801 bus_size_t alignment
, bus_size_t boundary
,
802 dma_addr_t lowaddr
, dma_addr_t highaddr
,
803 bus_dma_filter_t
*filter
, void *filterarg
,
804 bus_size_t maxsize
, int nsegments
,
805 bus_size_t maxsegsz
, int flags
, bus_dma_tag_t
*ret_tag
)
809 dmat
= malloc(sizeof(*dmat
), M_DEVBUF
, M_NOWAIT
);
814 * Linux is very simplistic about DMA memory. For now don't
815 * maintain all specification information. Once Linux supplies
816 * better facilities for doing these operations, or the
817 * needs of this particular driver change, we might need to do
820 dmat
->alignment
= alignment
;
821 dmat
->boundary
= boundary
;
822 dmat
->maxsize
= maxsize
;
828 ahc_dma_tag_destroy(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
)
830 free(dmat
, M_DEVBUF
);
834 ahc_dmamem_alloc(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, void** vaddr
,
835 int flags
, bus_dmamap_t
*mapp
)
837 *vaddr
= pci_alloc_consistent(ahc
->dev_softc
,
838 dmat
->maxsize
, mapp
);
845 ahc_dmamem_free(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
,
846 void* vaddr
, bus_dmamap_t map
)
848 pci_free_consistent(ahc
->dev_softc
, dmat
->maxsize
,
853 ahc_dmamap_load(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
,
854 void *buf
, bus_size_t buflen
, bus_dmamap_callback_t
*cb
,
855 void *cb_arg
, int flags
)
858 * Assume for now that this will only be used during
859 * initialization and not for per-transaction buffer mapping.
861 bus_dma_segment_t stack_sg
;
863 stack_sg
.ds_addr
= map
;
864 stack_sg
.ds_len
= dmat
->maxsize
;
865 cb(cb_arg
, &stack_sg
, /*nseg*/1, /*error*/0);
870 ahc_dmamap_destroy(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
)
875 ahc_dmamap_unload(struct ahc_softc
*ahc
, bus_dma_tag_t dmat
, bus_dmamap_t map
)
882 ahc_linux_setup_tag_info_global(char *p
)
886 tags
= simple_strtoul(p
+ 1, NULL
, 0) & 0xff;
887 printf("Setting Global Tags= %d\n", tags
);
889 for (i
= 0; i
< ARRAY_SIZE(aic7xxx_tag_info
); i
++) {
890 for (j
= 0; j
< AHC_NUM_TARGETS
; j
++) {
891 aic7xxx_tag_info
[i
].tag_commands
[j
] = tags
;
897 ahc_linux_setup_tag_info(u_long arg
, int instance
, int targ
, int32_t value
)
900 if ((instance
>= 0) && (targ
>= 0)
901 && (instance
< ARRAY_SIZE(aic7xxx_tag_info
))
902 && (targ
< AHC_NUM_TARGETS
)) {
903 aic7xxx_tag_info
[instance
].tag_commands
[targ
] = value
& 0xff;
905 printf("tag_info[%d:%d] = %d\n", instance
, targ
, value
);
910 ahc_parse_brace_option(char *opt_name
, char *opt_arg
, char *end
, int depth
,
911 void (*callback
)(u_long
, int, int, int32_t),
920 char tok_list
[] = {'.', ',', '{', '}', '\0'};
922 /* All options use a ':' name/arg separator */
930 * Restore separator that may be in
931 * the middle of our option argument.
933 tok_end
= strchr(opt_arg
, '\0');
939 if (instance
== -1) {
946 printf("Malformed Option %s\n",
956 else if (instance
!= -1)
966 else if (instance
>= 0)
975 for (i
= 0; tok_list
[i
]; i
++) {
976 tok_end2
= strchr(opt_arg
, tok_list
[i
]);
977 if ((tok_end2
) && (tok_end2
< tok_end
))
980 callback(callback_arg
, instance
, targ
,
981 simple_strtol(opt_arg
, NULL
, 0));
990 * Handle Linux boot parameters. This routine allows for assigning a value
991 * to a parameter with a ':' between the parameter and the value.
992 * ie. aic7xxx=stpwlev:1,extended
995 aic7xxx_setup(char *s
)
1005 { "extended", &aic7xxx_extended
},
1006 { "no_reset", &aic7xxx_no_reset
},
1007 { "verbose", &aic7xxx_verbose
},
1008 { "allow_memio", &aic7xxx_allow_memio
},
1010 { "debug", &ahc_debug
},
1012 { "periodic_otag", &aic7xxx_periodic_otag
},
1013 { "pci_parity", &aic7xxx_pci_parity
},
1014 { "seltime", &aic7xxx_seltime
},
1015 { "tag_info", NULL
},
1016 { "global_tag_depth", NULL
},
1020 end
= strchr(s
, '\0');
1023 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1024 * will never be 0 in this case.
1028 while ((p
= strsep(&s
, ",.")) != NULL
) {
1031 for (i
= 0; i
< ARRAY_SIZE(options
); i
++) {
1033 n
= strlen(options
[i
].name
);
1034 if (strncmp(options
[i
].name
, p
, n
) == 0)
1037 if (i
== ARRAY_SIZE(options
))
1040 if (strncmp(p
, "global_tag_depth", n
) == 0) {
1041 ahc_linux_setup_tag_info_global(p
+ n
);
1042 } else if (strncmp(p
, "tag_info", n
) == 0) {
1043 s
= ahc_parse_brace_option("tag_info", p
+ n
, end
,
1044 2, ahc_linux_setup_tag_info
, 0);
1045 } else if (p
[n
] == ':') {
1046 *(options
[i
].flag
) = simple_strtoul(p
+ n
+ 1, NULL
, 0);
1047 } else if (strncmp(p
, "verbose", n
) == 0) {
1048 *(options
[i
].flag
) = 1;
1050 *(options
[i
].flag
) ^= 0xFFFFFFFF;
1056 __setup("aic7xxx=", aic7xxx_setup
);
1058 uint32_t aic7xxx_verbose
;
1061 ahc_linux_register_host(struct ahc_softc
*ahc
, struct scsi_host_template
*template)
1064 struct Scsi_Host
*host
;
1069 template->name
= ahc
->description
;
1070 host
= scsi_host_alloc(template, sizeof(struct ahc_softc
*));
1074 *((struct ahc_softc
**)host
->hostdata
) = ahc
;
1075 ahc
->platform_data
->host
= host
;
1076 host
->can_queue
= AHC_MAX_QUEUE
;
1077 host
->cmd_per_lun
= 2;
1078 /* XXX No way to communicate the ID for multiple channels */
1079 host
->this_id
= ahc
->our_id
;
1080 host
->irq
= ahc
->platform_data
->irq
;
1081 host
->max_id
= (ahc
->features
& AHC_WIDE
) ? 16 : 8;
1082 host
->max_lun
= AHC_NUM_LUNS
;
1083 host
->max_channel
= (ahc
->features
& AHC_TWIN
) ? 1 : 0;
1084 host
->sg_tablesize
= AHC_NSEG
;
1086 ahc_set_unit(ahc
, ahc_linux_unit
++);
1087 ahc_unlock(ahc
, &s
);
1088 sprintf(buf
, "scsi%d", host
->host_no
);
1089 new_name
= malloc(strlen(buf
) + 1, M_DEVBUF
, M_NOWAIT
);
1090 if (new_name
!= NULL
) {
1091 strcpy(new_name
, buf
);
1092 ahc_set_name(ahc
, new_name
);
1094 host
->unique_id
= ahc
->unit
;
1095 ahc_linux_initialize_scsi_bus(ahc
);
1096 ahc_intr_enable(ahc
, TRUE
);
1098 host
->transportt
= ahc_linux_transport_template
;
1100 retval
= scsi_add_host(host
,
1101 (ahc
->dev_softc
? &ahc
->dev_softc
->dev
: NULL
));
1103 printk(KERN_WARNING
"aic7xxx: scsi_add_host failed\n");
1104 scsi_host_put(host
);
1108 scsi_scan_host(host
);
1113 * Place the SCSI bus into a known state by either resetting it,
1114 * or forcing transfer negotiations on the next command to any
1118 ahc_linux_initialize_scsi_bus(struct ahc_softc
*ahc
)
1129 if (aic7xxx_no_reset
!= 0)
1130 ahc
->flags
&= ~(AHC_RESET_BUS_A
|AHC_RESET_BUS_B
);
1132 if ((ahc
->flags
& AHC_RESET_BUS_A
) != 0)
1133 ahc_reset_channel(ahc
, 'A', /*initiate_reset*/TRUE
);
1135 numtarg
= (ahc
->features
& AHC_WIDE
) ? 16 : 8;
1137 if ((ahc
->features
& AHC_TWIN
) != 0) {
1139 if ((ahc
->flags
& AHC_RESET_BUS_B
) != 0) {
1140 ahc_reset_channel(ahc
, 'B', /*initiate_reset*/TRUE
);
1149 * Force negotiation to async for all targets that
1150 * will not see an initial bus reset.
1152 for (; i
< numtarg
; i
++) {
1153 struct ahc_devinfo devinfo
;
1154 struct ahc_initiator_tinfo
*tinfo
;
1155 struct ahc_tmode_tstate
*tstate
;
1161 our_id
= ahc
->our_id
;
1163 if (i
> 7 && (ahc
->features
& AHC_TWIN
) != 0) {
1165 our_id
= ahc
->our_id_b
;
1168 tinfo
= ahc_fetch_transinfo(ahc
, channel
, our_id
,
1169 target_id
, &tstate
);
1170 ahc_compile_devinfo(&devinfo
, our_id
, target_id
,
1171 CAM_LUN_WILDCARD
, channel
, ROLE_INITIATOR
);
1172 ahc_update_neg_request(ahc
, &devinfo
, tstate
,
1173 tinfo
, AHC_NEG_ALWAYS
);
1175 ahc_unlock(ahc
, &s
);
1176 /* Give the bus some time to recover */
1177 if ((ahc
->flags
& (AHC_RESET_BUS_A
|AHC_RESET_BUS_B
)) != 0) {
1178 ahc_linux_freeze_simq(ahc
);
1179 msleep(AIC7XXX_RESET_DELAY
);
1180 ahc_linux_release_simq(ahc
);
1185 ahc_platform_alloc(struct ahc_softc
*ahc
, void *platform_arg
)
1188 ahc
->platform_data
=
1189 malloc(sizeof(struct ahc_platform_data
), M_DEVBUF
, M_NOWAIT
);
1190 if (ahc
->platform_data
== NULL
)
1192 memset(ahc
->platform_data
, 0, sizeof(struct ahc_platform_data
));
1193 ahc
->platform_data
->irq
= AHC_LINUX_NOIRQ
;
1195 ahc
->seltime
= (aic7xxx_seltime
& 0x3) << 4;
1196 ahc
->seltime_b
= (aic7xxx_seltime
& 0x3) << 4;
1197 if (aic7xxx_pci_parity
== 0)
1198 ahc
->flags
|= AHC_DISABLE_PCI_PERR
;
1204 ahc_platform_free(struct ahc_softc
*ahc
)
1206 struct scsi_target
*starget
;
1209 if (ahc
->platform_data
!= NULL
) {
1210 /* destroy all of the device and target objects */
1211 for (i
= 0; i
< AHC_NUM_TARGETS
; i
++) {
1212 starget
= ahc
->platform_data
->starget
[i
];
1213 if (starget
!= NULL
) {
1214 for (j
= 0; j
< AHC_NUM_LUNS
; j
++) {
1215 struct ahc_linux_target
*targ
=
1216 scsi_transport_target_data(starget
);
1218 if (targ
->sdev
[j
] == NULL
)
1220 targ
->sdev
[j
] = NULL
;
1222 ahc
->platform_data
->starget
[i
] = NULL
;
1226 if (ahc
->platform_data
->irq
!= AHC_LINUX_NOIRQ
)
1227 free_irq(ahc
->platform_data
->irq
, ahc
);
1228 if (ahc
->tag
== BUS_SPACE_PIO
1229 && ahc
->bsh
.ioport
!= 0)
1230 release_region(ahc
->bsh
.ioport
, 256);
1231 if (ahc
->tag
== BUS_SPACE_MEMIO
1232 && ahc
->bsh
.maddr
!= NULL
) {
1233 iounmap(ahc
->bsh
.maddr
);
1234 release_mem_region(ahc
->platform_data
->mem_busaddr
,
1238 if (ahc
->platform_data
->host
)
1239 scsi_host_put(ahc
->platform_data
->host
);
1241 free(ahc
->platform_data
, M_DEVBUF
);
1246 ahc_platform_freeze_devq(struct ahc_softc
*ahc
, struct scb
*scb
)
1248 ahc_platform_abort_scbs(ahc
, SCB_GET_TARGET(ahc
, scb
),
1249 SCB_GET_CHANNEL(ahc
, scb
),
1250 SCB_GET_LUN(scb
), SCB_LIST_NULL
,
1251 ROLE_UNKNOWN
, CAM_REQUEUE_REQ
);
1255 ahc_platform_set_tags(struct ahc_softc
*ahc
, struct ahc_devinfo
*devinfo
,
1258 struct scsi_target
*starget
;
1259 struct ahc_linux_target
*targ
;
1260 struct ahc_linux_device
*dev
;
1261 struct scsi_device
*sdev
;
1262 u_int target_offset
;
1266 target_offset
= devinfo
->target
;
1267 if (devinfo
->channel
!= 'A')
1269 starget
= ahc
->platform_data
->starget
[target_offset
];
1270 targ
= scsi_transport_target_data(starget
);
1271 BUG_ON(targ
== NULL
);
1272 sdev
= targ
->sdev
[devinfo
->lun
];
1275 dev
= scsi_transport_device_data(sdev
);
1277 was_queuing
= dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
);
1280 case AHC_QUEUE_NONE
:
1283 case AHC_QUEUE_BASIC
:
1284 now_queuing
= AHC_DEV_Q_BASIC
;
1286 case AHC_QUEUE_TAGGED
:
1287 now_queuing
= AHC_DEV_Q_TAGGED
;
1290 if ((dev
->flags
& AHC_DEV_FREEZE_TIL_EMPTY
) == 0
1291 && (was_queuing
!= now_queuing
)
1292 && (dev
->active
!= 0)) {
1293 dev
->flags
|= AHC_DEV_FREEZE_TIL_EMPTY
;
1297 dev
->flags
&= ~(AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
|AHC_DEV_PERIODIC_OTAG
);
1301 usertags
= ahc_linux_user_tagdepth(ahc
, devinfo
);
1304 * Start out agressively and allow our
1305 * dynamic queue depth algorithm to take
1308 dev
->maxtags
= usertags
;
1309 dev
->openings
= dev
->maxtags
- dev
->active
;
1311 if (dev
->maxtags
== 0) {
1313 * Queueing is disabled by the user.
1316 } else if (alg
== AHC_QUEUE_TAGGED
) {
1317 dev
->flags
|= AHC_DEV_Q_TAGGED
;
1318 if (aic7xxx_periodic_otag
!= 0)
1319 dev
->flags
|= AHC_DEV_PERIODIC_OTAG
;
1321 dev
->flags
|= AHC_DEV_Q_BASIC
;
1323 /* We can only have one opening. */
1325 dev
->openings
= 1 - dev
->active
;
1327 switch ((dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
))) {
1328 case AHC_DEV_Q_BASIC
:
1329 scsi_set_tag_type(sdev
, MSG_SIMPLE_TAG
);
1330 scsi_activate_tcq(sdev
, dev
->openings
+ dev
->active
);
1332 case AHC_DEV_Q_TAGGED
:
1333 scsi_set_tag_type(sdev
, MSG_ORDERED_TAG
);
1334 scsi_activate_tcq(sdev
, dev
->openings
+ dev
->active
);
1338 * We allow the OS to queue 2 untagged transactions to
1339 * us at any time even though we can only execute them
1340 * serially on the controller/device. This should
1341 * remove some latency.
1343 scsi_deactivate_tcq(sdev
, 2);
1349 ahc_platform_abort_scbs(struct ahc_softc
*ahc
, int target
, char channel
,
1350 int lun
, u_int tag
, role_t role
, uint32_t status
)
1356 ahc_linux_user_tagdepth(struct ahc_softc
*ahc
, struct ahc_devinfo
*devinfo
)
1358 static int warned_user
;
1362 if ((ahc
->user_discenable
& devinfo
->target_mask
) != 0) {
1363 if (ahc
->unit
>= ARRAY_SIZE(aic7xxx_tag_info
)) {
1364 if (warned_user
== 0) {
1367 "aic7xxx: WARNING: Insufficient tag_info instances\n"
1368 "aic7xxx: for installed controllers. Using defaults\n"
1369 "aic7xxx: Please update the aic7xxx_tag_info array in\n"
1370 "aic7xxx: the aic7xxx_osm..c source file.\n");
1373 tags
= AHC_MAX_QUEUE
;
1375 adapter_tag_info_t
*tag_info
;
1377 tag_info
= &aic7xxx_tag_info
[ahc
->unit
];
1378 tags
= tag_info
->tag_commands
[devinfo
->target_offset
];
1379 if (tags
> AHC_MAX_QUEUE
)
1380 tags
= AHC_MAX_QUEUE
;
1387 * Determines the queue depth for a given device.
1390 ahc_linux_device_queue_depth(struct scsi_device
*sdev
)
1392 struct ahc_devinfo devinfo
;
1394 struct ahc_softc
*ahc
= *((struct ahc_softc
**)sdev
->host
->hostdata
);
1396 ahc_compile_devinfo(&devinfo
,
1397 sdev
->sdev_target
->channel
== 0
1398 ? ahc
->our_id
: ahc
->our_id_b
,
1399 sdev
->sdev_target
->id
, sdev
->lun
,
1400 sdev
->sdev_target
->channel
== 0 ? 'A' : 'B',
1402 tags
= ahc_linux_user_tagdepth(ahc
, &devinfo
);
1403 if (tags
!= 0 && sdev
->tagged_supported
!= 0) {
1405 ahc_set_tags(ahc
, &devinfo
, AHC_QUEUE_TAGGED
);
1406 ahc_print_devinfo(ahc
, &devinfo
);
1407 printf("Tagged Queuing enabled. Depth %d\n", tags
);
1409 ahc_set_tags(ahc
, &devinfo
, AHC_QUEUE_NONE
);
1414 ahc_linux_run_command(struct ahc_softc
*ahc
, struct ahc_linux_device
*dev
,
1415 struct scsi_cmnd
*cmd
)
1418 struct hardware_scb
*hscb
;
1419 struct ahc_initiator_tinfo
*tinfo
;
1420 struct ahc_tmode_tstate
*tstate
;
1422 struct scb_tailq
*untagged_q
= NULL
;
1425 * Schedule us to run later. The only reason we are not
1426 * running is because the whole controller Q is frozen.
1428 if (ahc
->platform_data
->qfrozen
!= 0)
1429 return SCSI_MLQUEUE_HOST_BUSY
;
1432 * We only allow one untagged transaction
1433 * per target in the initiator role unless
1434 * we are storing a full busy target *lun*
1435 * table in SCB space.
1437 if (!blk_rq_tagged(cmd
->request
)
1438 && (ahc
->features
& AHC_SCB_BTT
) == 0) {
1441 target_offset
= cmd
->device
->id
+ cmd
->device
->channel
* 8;
1442 untagged_q
= &(ahc
->untagged_queues
[target_offset
]);
1443 if (!TAILQ_EMPTY(untagged_q
))
1444 /* if we're already executing an untagged command
1445 * we're busy to another */
1446 return SCSI_MLQUEUE_DEVICE_BUSY
;
1450 * Get an scb to use.
1452 scb
= ahc_get_scb(ahc
);
1454 return SCSI_MLQUEUE_HOST_BUSY
;
1457 scb
->platform_data
->dev
= dev
;
1459 cmd
->host_scribble
= (char *)scb
;
1462 * Fill out basics of the HSCB.
1465 hscb
->scsiid
= BUILD_SCSIID(ahc
, cmd
);
1466 hscb
->lun
= cmd
->device
->lun
;
1467 mask
= SCB_GET_TARGET_MASK(ahc
, scb
);
1468 tinfo
= ahc_fetch_transinfo(ahc
, SCB_GET_CHANNEL(ahc
, scb
),
1469 SCB_GET_OUR_ID(scb
),
1470 SCB_GET_TARGET(ahc
, scb
), &tstate
);
1471 hscb
->scsirate
= tinfo
->scsirate
;
1472 hscb
->scsioffset
= tinfo
->curr
.offset
;
1473 if ((tstate
->ultraenb
& mask
) != 0)
1474 hscb
->control
|= ULTRAENB
;
1476 if ((ahc
->user_discenable
& mask
) != 0)
1477 hscb
->control
|= DISCENB
;
1479 if ((tstate
->auto_negotiate
& mask
) != 0) {
1480 scb
->flags
|= SCB_AUTO_NEGOTIATE
;
1481 scb
->hscb
->control
|= MK_MESSAGE
;
1484 if ((dev
->flags
& (AHC_DEV_Q_TAGGED
|AHC_DEV_Q_BASIC
)) != 0) {
1486 uint8_t tag_msgs
[2];
1488 msg_bytes
= scsi_populate_tag_msg(cmd
, tag_msgs
);
1489 if (msg_bytes
&& tag_msgs
[0] != MSG_SIMPLE_TASK
) {
1490 hscb
->control
|= tag_msgs
[0];
1491 if (tag_msgs
[0] == MSG_ORDERED_TASK
)
1492 dev
->commands_since_idle_or_otag
= 0;
1493 } else if (dev
->commands_since_idle_or_otag
== AHC_OTAG_THRESH
1494 && (dev
->flags
& AHC_DEV_Q_TAGGED
) != 0) {
1495 hscb
->control
|= MSG_ORDERED_TASK
;
1496 dev
->commands_since_idle_or_otag
= 0;
1498 hscb
->control
|= MSG_SIMPLE_TASK
;
1502 hscb
->cdb_len
= cmd
->cmd_len
;
1503 if (hscb
->cdb_len
<= 12) {
1504 memcpy(hscb
->shared_data
.cdb
, cmd
->cmnd
, hscb
->cdb_len
);
1506 memcpy(hscb
->cdb32
, cmd
->cmnd
, hscb
->cdb_len
);
1507 scb
->flags
|= SCB_CDB32_PTR
;
1510 scb
->platform_data
->xfer_len
= 0;
1511 ahc_set_residual(scb
, 0);
1512 ahc_set_sense_residual(scb
, 0);
1514 if (cmd
->use_sg
!= 0) {
1515 struct ahc_dma_seg
*sg
;
1516 struct scatterlist
*cur_seg
;
1517 struct scatterlist
*end_seg
;
1520 cur_seg
= (struct scatterlist
*)cmd
->request_buffer
;
1521 nseg
= pci_map_sg(ahc
->dev_softc
, cur_seg
, cmd
->use_sg
,
1522 cmd
->sc_data_direction
);
1523 end_seg
= cur_seg
+ nseg
;
1524 /* Copy the segments into the SG list. */
1527 * The sg_count may be larger than nseg if
1528 * a transfer crosses a 32bit page.
1530 while (cur_seg
< end_seg
) {
1535 addr
= sg_dma_address(cur_seg
);
1536 len
= sg_dma_len(cur_seg
);
1537 consumed
= ahc_linux_map_seg(ahc
, scb
,
1540 scb
->sg_count
+= consumed
;
1544 sg
->len
|= ahc_htole32(AHC_DMA_LAST_SEG
);
1547 * Reset the sg list pointer.
1550 ahc_htole32(scb
->sg_list_phys
| SG_FULL_RESID
);
1553 * Copy the first SG into the "current"
1554 * data pointer area.
1556 scb
->hscb
->dataptr
= scb
->sg_list
->addr
;
1557 scb
->hscb
->datacnt
= scb
->sg_list
->len
;
1558 } else if (cmd
->request_bufflen
!= 0) {
1559 struct ahc_dma_seg
*sg
;
1563 addr
= pci_map_single(ahc
->dev_softc
,
1564 cmd
->request_buffer
,
1565 cmd
->request_bufflen
,
1566 cmd
->sc_data_direction
);
1567 scb
->platform_data
->buf_busaddr
= addr
;
1568 scb
->sg_count
= ahc_linux_map_seg(ahc
, scb
,
1570 cmd
->request_bufflen
);
1571 sg
->len
|= ahc_htole32(AHC_DMA_LAST_SEG
);
1574 * Reset the sg list pointer.
1577 ahc_htole32(scb
->sg_list_phys
| SG_FULL_RESID
);
1580 * Copy the first SG into the "current"
1581 * data pointer area.
1583 scb
->hscb
->dataptr
= sg
->addr
;
1584 scb
->hscb
->datacnt
= sg
->len
;
1586 scb
->hscb
->sgptr
= ahc_htole32(SG_LIST_NULL
);
1587 scb
->hscb
->dataptr
= 0;
1588 scb
->hscb
->datacnt
= 0;
1592 LIST_INSERT_HEAD(&ahc
->pending_scbs
, scb
, pending_links
);
1595 dev
->commands_issued
++;
1596 if ((dev
->flags
& AHC_DEV_PERIODIC_OTAG
) != 0)
1597 dev
->commands_since_idle_or_otag
++;
1599 scb
->flags
|= SCB_ACTIVE
;
1601 TAILQ_INSERT_TAIL(untagged_q
, scb
, links
.tqe
);
1602 scb
->flags
|= SCB_UNTAGGEDQ
;
1604 ahc_queue_scb(ahc
, scb
);
1609 * SCSI controller interrupt handler.
1612 ahc_linux_isr(int irq
, void *dev_id
, struct pt_regs
* regs
)
1614 struct ahc_softc
*ahc
;
1618 ahc
= (struct ahc_softc
*) dev_id
;
1619 ahc_lock(ahc
, &flags
);
1620 ours
= ahc_intr(ahc
);
1621 ahc_unlock(ahc
, &flags
);
1622 return IRQ_RETVAL(ours
);
1626 ahc_platform_flushwork(struct ahc_softc
*ahc
)
1632 ahc_send_async(struct ahc_softc
*ahc
, char channel
,
1633 u_int target
, u_int lun
, ac_code code
, void *arg
)
1636 case AC_TRANSFER_NEG
:
1639 struct scsi_target
*starget
;
1640 struct ahc_linux_target
*targ
;
1641 struct info_str info
;
1642 struct ahc_initiator_tinfo
*tinfo
;
1643 struct ahc_tmode_tstate
*tstate
;
1645 unsigned int target_ppr_options
;
1647 BUG_ON(target
== CAM_TARGET_WILDCARD
);
1650 info
.length
= sizeof(buf
);
1653 tinfo
= ahc_fetch_transinfo(ahc
, channel
,
1654 channel
== 'A' ? ahc
->our_id
1659 * Don't bother reporting results while
1660 * negotiations are still pending.
1662 if (tinfo
->curr
.period
!= tinfo
->goal
.period
1663 || tinfo
->curr
.width
!= tinfo
->goal
.width
1664 || tinfo
->curr
.offset
!= tinfo
->goal
.offset
1665 || tinfo
->curr
.ppr_options
!= tinfo
->goal
.ppr_options
)
1666 if (bootverbose
== 0)
1670 * Don't bother reporting results that
1671 * are identical to those last reported.
1673 target_offset
= target
;
1676 starget
= ahc
->platform_data
->starget
[target_offset
];
1677 if (starget
== NULL
)
1679 targ
= scsi_transport_target_data(starget
);
1681 target_ppr_options
=
1682 (spi_dt(starget
) ? MSG_EXT_PPR_DT_REQ
: 0)
1683 + (spi_qas(starget
) ? MSG_EXT_PPR_QAS_REQ
: 0)
1684 + (spi_iu(starget
) ? MSG_EXT_PPR_IU_REQ
: 0);
1686 if (tinfo
->curr
.period
== spi_period(starget
)
1687 && tinfo
->curr
.width
== spi_width(starget
)
1688 && tinfo
->curr
.offset
== spi_offset(starget
)
1689 && tinfo
->curr
.ppr_options
== target_ppr_options
)
1690 if (bootverbose
== 0)
1693 spi_period(starget
) = tinfo
->curr
.period
;
1694 spi_width(starget
) = tinfo
->curr
.width
;
1695 spi_offset(starget
) = tinfo
->curr
.offset
;
1696 spi_dt(starget
) = tinfo
->curr
.ppr_options
& MSG_EXT_PPR_DT_REQ
? 1 : 0;
1697 spi_qas(starget
) = tinfo
->curr
.ppr_options
& MSG_EXT_PPR_QAS_REQ
? 1 : 0;
1698 spi_iu(starget
) = tinfo
->curr
.ppr_options
& MSG_EXT_PPR_IU_REQ
? 1 : 0;
1699 spi_display_xfer_agreement(starget
);
1704 WARN_ON(lun
!= CAM_LUN_WILDCARD
);
1705 scsi_report_device_reset(ahc
->platform_data
->host
,
1706 channel
- 'A', target
);
1710 if (ahc
->platform_data
->host
!= NULL
) {
1711 scsi_report_bus_reset(ahc
->platform_data
->host
,
1716 panic("ahc_send_async: Unexpected async event");
1721 * Calls the higher level scsi done function and frees the scb.
1724 ahc_done(struct ahc_softc
*ahc
, struct scb
*scb
)
1726 struct scsi_cmnd
*cmd
;
1727 struct ahc_linux_device
*dev
;
1729 LIST_REMOVE(scb
, pending_links
);
1730 if ((scb
->flags
& SCB_UNTAGGEDQ
) != 0) {
1731 struct scb_tailq
*untagged_q
;
1734 target_offset
= SCB_GET_TARGET_OFFSET(ahc
, scb
);
1735 untagged_q
= &(ahc
->untagged_queues
[target_offset
]);
1736 TAILQ_REMOVE(untagged_q
, scb
, links
.tqe
);
1737 BUG_ON(!TAILQ_EMPTY(untagged_q
));
1740 if ((scb
->flags
& SCB_ACTIVE
) == 0) {
1741 printf("SCB %d done'd twice\n", scb
->hscb
->tag
);
1742 ahc_dump_card_state(ahc
);
1743 panic("Stopping for safety");
1746 dev
= scb
->platform_data
->dev
;
1749 if ((cmd
->result
& (CAM_DEV_QFRZN
<< 16)) != 0) {
1750 cmd
->result
&= ~(CAM_DEV_QFRZN
<< 16);
1753 ahc_linux_unmap_scb(ahc
, scb
);
1756 * Guard against stale sense data.
1757 * The Linux mid-layer assumes that sense
1758 * was retrieved anytime the first byte of
1759 * the sense buffer looks "sane".
1761 cmd
->sense_buffer
[0] = 0;
1762 if (ahc_get_transaction_status(scb
) == CAM_REQ_INPROG
) {
1763 uint32_t amount_xferred
;
1766 ahc_get_transfer_length(scb
) - ahc_get_residual(scb
);
1767 if ((scb
->flags
& SCB_TRANSMISSION_ERROR
) != 0) {
1769 if ((ahc_debug
& AHC_SHOW_MISC
) != 0) {
1770 ahc_print_path(ahc
, scb
);
1771 printf("Set CAM_UNCOR_PARITY\n");
1774 ahc_set_transaction_status(scb
, CAM_UNCOR_PARITY
);
1775 #ifdef AHC_REPORT_UNDERFLOWS
1777 * This code is disabled by default as some
1778 * clients of the SCSI system do not properly
1779 * initialize the underflow parameter. This
1780 * results in spurious termination of commands
1781 * that complete as expected (e.g. underflow is
1782 * allowed as command can return variable amounts
1785 } else if (amount_xferred
< scb
->io_ctx
->underflow
) {
1788 ahc_print_path(ahc
, scb
);
1790 for (i
= 0; i
< scb
->io_ctx
->cmd_len
; i
++)
1791 printf(" 0x%x", scb
->io_ctx
->cmnd
[i
]);
1793 ahc_print_path(ahc
, scb
);
1794 printf("Saw underflow (%ld of %ld bytes). "
1795 "Treated as error\n",
1796 ahc_get_residual(scb
),
1797 ahc_get_transfer_length(scb
));
1798 ahc_set_transaction_status(scb
, CAM_DATA_RUN_ERR
);
1801 ahc_set_transaction_status(scb
, CAM_REQ_CMP
);
1803 } else if (ahc_get_transaction_status(scb
) == CAM_SCSI_STATUS_ERROR
) {
1804 ahc_linux_handle_scsi_status(ahc
, cmd
->device
, scb
);
1807 if (dev
->openings
== 1
1808 && ahc_get_transaction_status(scb
) == CAM_REQ_CMP
1809 && ahc_get_scsi_status(scb
) != SCSI_STATUS_QUEUE_FULL
)
1810 dev
->tag_success_count
++;
1812 * Some devices deal with temporary internal resource
1813 * shortages by returning queue full. When the queue
1814 * full occurrs, we throttle back. Slowly try to get
1815 * back to our previous queue depth.
1817 if ((dev
->openings
+ dev
->active
) < dev
->maxtags
1818 && dev
->tag_success_count
> AHC_TAG_SUCCESS_INTERVAL
) {
1819 dev
->tag_success_count
= 0;
1823 if (dev
->active
== 0)
1824 dev
->commands_since_idle_or_otag
= 0;
1826 if ((scb
->flags
& SCB_RECOVERY_SCB
) != 0) {
1827 printf("Recovery SCB completes\n");
1828 if (ahc_get_transaction_status(scb
) == CAM_BDR_SENT
1829 || ahc_get_transaction_status(scb
) == CAM_REQ_ABORTED
)
1830 ahc_set_transaction_status(scb
, CAM_CMD_TIMEOUT
);
1832 if (ahc
->platform_data
->eh_done
)
1833 complete(ahc
->platform_data
->eh_done
);
1836 ahc_free_scb(ahc
, scb
);
1837 ahc_linux_queue_cmd_complete(ahc
, cmd
);
1841 ahc_linux_handle_scsi_status(struct ahc_softc
*ahc
,
1842 struct scsi_device
*sdev
, struct scb
*scb
)
1844 struct ahc_devinfo devinfo
;
1845 struct ahc_linux_device
*dev
= scsi_transport_device_data(sdev
);
1847 ahc_compile_devinfo(&devinfo
,
1849 sdev
->sdev_target
->id
, sdev
->lun
,
1850 sdev
->sdev_target
->channel
== 0 ? 'A' : 'B',
1854 * We don't currently trust the mid-layer to
1855 * properly deal with queue full or busy. So,
1856 * when one occurs, we tell the mid-layer to
1857 * unconditionally requeue the command to us
1858 * so that we can retry it ourselves. We also
1859 * implement our own throttling mechanism so
1860 * we don't clobber the device with too many
1863 switch (ahc_get_scsi_status(scb
)) {
1866 case SCSI_STATUS_CHECK_COND
:
1867 case SCSI_STATUS_CMD_TERMINATED
:
1869 struct scsi_cmnd
*cmd
;
1872 * Copy sense information to the OS's cmd
1873 * structure if it is available.
1876 if (scb
->flags
& SCB_SENSE
) {
1879 sense_size
= MIN(sizeof(struct scsi_sense_data
)
1880 - ahc_get_sense_residual(scb
),
1881 sizeof(cmd
->sense_buffer
));
1882 memcpy(cmd
->sense_buffer
,
1883 ahc_get_sense_buf(ahc
, scb
), sense_size
);
1884 if (sense_size
< sizeof(cmd
->sense_buffer
))
1885 memset(&cmd
->sense_buffer
[sense_size
], 0,
1886 sizeof(cmd
->sense_buffer
) - sense_size
);
1887 cmd
->result
|= (DRIVER_SENSE
<< 24);
1889 if (ahc_debug
& AHC_SHOW_SENSE
) {
1892 printf("Copied %d bytes of sense data:",
1894 for (i
= 0; i
< sense_size
; i
++) {
1897 printf("0x%x ", cmd
->sense_buffer
[i
]);
1905 case SCSI_STATUS_QUEUE_FULL
:
1908 * By the time the core driver has returned this
1909 * command, all other commands that were queued
1910 * to us but not the device have been returned.
1911 * This ensures that dev->active is equal to
1912 * the number of commands actually queued to
1915 dev
->tag_success_count
= 0;
1916 if (dev
->active
!= 0) {
1918 * Drop our opening count to the number
1919 * of commands currently outstanding.
1923 ahc_print_path(ahc, scb);
1924 printf("Dropping tag count to %d\n", dev->active);
1926 if (dev
->active
== dev
->tags_on_last_queuefull
) {
1928 dev
->last_queuefull_same_count
++;
1930 * If we repeatedly see a queue full
1931 * at the same queue depth, this
1932 * device has a fixed number of tag
1933 * slots. Lock in this tag depth
1934 * so we stop seeing queue fulls from
1937 if (dev
->last_queuefull_same_count
1938 == AHC_LOCK_TAGS_COUNT
) {
1939 dev
->maxtags
= dev
->active
;
1940 ahc_print_path(ahc
, scb
);
1941 printf("Locking max tag count at %d\n",
1945 dev
->tags_on_last_queuefull
= dev
->active
;
1946 dev
->last_queuefull_same_count
= 0;
1948 ahc_set_transaction_status(scb
, CAM_REQUEUE_REQ
);
1949 ahc_set_scsi_status(scb
, SCSI_STATUS_OK
);
1950 ahc_platform_set_tags(ahc
, &devinfo
,
1951 (dev
->flags
& AHC_DEV_Q_BASIC
)
1952 ? AHC_QUEUE_BASIC
: AHC_QUEUE_TAGGED
);
1956 * Drop down to a single opening, and treat this
1957 * as if the target returned BUSY SCSI status.
1960 ahc_set_scsi_status(scb
, SCSI_STATUS_BUSY
);
1961 ahc_platform_set_tags(ahc
, &devinfo
,
1962 (dev
->flags
& AHC_DEV_Q_BASIC
)
1963 ? AHC_QUEUE_BASIC
: AHC_QUEUE_TAGGED
);
1970 ahc_linux_queue_cmd_complete(struct ahc_softc
*ahc
, struct scsi_cmnd
*cmd
)
1973 * Map CAM error codes into Linux Error codes. We
1974 * avoid the conversion so that the DV code has the
1975 * full error information available when making
1976 * state change decisions.
1981 switch (ahc_cmd_get_transaction_status(cmd
)) {
1982 case CAM_REQ_INPROG
:
1984 case CAM_SCSI_STATUS_ERROR
:
1985 new_status
= DID_OK
;
1987 case CAM_REQ_ABORTED
:
1988 new_status
= DID_ABORT
;
1991 new_status
= DID_BUS_BUSY
;
1993 case CAM_REQ_INVALID
:
1994 case CAM_PATH_INVALID
:
1995 new_status
= DID_BAD_TARGET
;
1997 case CAM_SEL_TIMEOUT
:
1998 new_status
= DID_NO_CONNECT
;
2000 case CAM_SCSI_BUS_RESET
:
2002 new_status
= DID_RESET
;
2004 case CAM_UNCOR_PARITY
:
2005 new_status
= DID_PARITY
;
2007 case CAM_CMD_TIMEOUT
:
2008 new_status
= DID_TIME_OUT
;
2011 case CAM_REQ_CMP_ERR
:
2012 case CAM_AUTOSENSE_FAIL
:
2014 case CAM_DATA_RUN_ERR
:
2015 case CAM_UNEXP_BUSFREE
:
2016 case CAM_SEQUENCE_FAIL
:
2017 case CAM_CCB_LEN_ERR
:
2018 case CAM_PROVIDE_FAIL
:
2019 case CAM_REQ_TERMIO
:
2020 case CAM_UNREC_HBA_ERROR
:
2021 case CAM_REQ_TOO_BIG
:
2022 new_status
= DID_ERROR
;
2024 case CAM_REQUEUE_REQ
:
2025 new_status
= DID_REQUEUE
;
2028 /* We should never get here */
2029 new_status
= DID_ERROR
;
2033 ahc_cmd_set_transaction_status(cmd
, new_status
);
2036 cmd
->scsi_done(cmd
);
2040 ahc_linux_freeze_simq(struct ahc_softc
*ahc
)
2045 ahc
->platform_data
->qfrozen
++;
2046 if (ahc
->platform_data
->qfrozen
== 1) {
2047 scsi_block_requests(ahc
->platform_data
->host
);
2049 /* XXX What about Twin channels? */
2050 ahc_platform_abort_scbs(ahc
, CAM_TARGET_WILDCARD
, ALL_CHANNELS
,
2051 CAM_LUN_WILDCARD
, SCB_LIST_NULL
,
2052 ROLE_INITIATOR
, CAM_REQUEUE_REQ
);
2054 ahc_unlock(ahc
, &s
);
2058 ahc_linux_release_simq(struct ahc_softc
*ahc
)
2065 if (ahc
->platform_data
->qfrozen
> 0)
2066 ahc
->platform_data
->qfrozen
--;
2067 if (ahc
->platform_data
->qfrozen
== 0)
2069 ahc_unlock(ahc
, &s
);
2071 * There is still a race here. The mid-layer
2072 * should keep its own freeze count and use
2073 * a bottom half handler to run the queues
2074 * so we can unblock with our own lock held.
2077 scsi_unblock_requests(ahc
->platform_data
->host
);
2081 ahc_linux_queue_recovery_cmd(struct scsi_cmnd
*cmd
, scb_flag flag
)
2083 struct ahc_softc
*ahc
;
2084 struct ahc_linux_device
*dev
;
2085 struct scb
*pending_scb
;
2087 u_int active_scb_index
;
2096 unsigned long flags
;
2101 ahc
= *(struct ahc_softc
**)cmd
->device
->host
->hostdata
;
2103 scmd_printk(KERN_INFO
, cmd
, "Attempting to queue a%s message\n",
2104 flag
== SCB_ABORT
? "n ABORT" : " TARGET RESET");
2107 for (cdb_byte
= 0; cdb_byte
< cmd
->cmd_len
; cdb_byte
++)
2108 printf(" 0x%x", cmd
->cmnd
[cdb_byte
]);
2111 ahc_lock(ahc
, &flags
);
2114 * First determine if we currently own this command.
2115 * Start by searching the device queue. If not found
2116 * there, check the pending_scb list. If not found
2117 * at all, and the system wanted us to just abort the
2118 * command, return success.
2120 dev
= scsi_transport_device_data(cmd
->device
);
2124 * No target device for this command exists,
2125 * so we must not still own the command.
2127 printf("%s:%d:%d:%d: Is not an active device\n",
2128 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
2134 if ((dev
->flags
& (AHC_DEV_Q_BASIC
|AHC_DEV_Q_TAGGED
)) == 0
2135 && ahc_search_untagged_queues(ahc
, cmd
, cmd
->device
->id
,
2136 cmd
->device
->channel
+ 'A',
2138 CAM_REQ_ABORTED
, SEARCH_COMPLETE
) != 0) {
2139 printf("%s:%d:%d:%d: Command found on untagged queue\n",
2140 ahc_name(ahc
), cmd
->device
->channel
, cmd
->device
->id
,
2147 * See if we can find a matching cmd in the pending list.
2149 LIST_FOREACH(pending_scb
, &ahc
->pending_scbs
, pending_links
) {
2150 if (pending_scb
->io_ctx
== cmd
)
2154 if (pending_scb
== NULL
&& flag
== SCB_DEVICE_RESET
) {
2156 /* Any SCB for this device will do for a target reset */
2157 LIST_FOREACH(pending_scb
, &ahc
->pending_scbs
, pending_links
) {
2158 if (ahc_match_scb(ahc
, pending_scb
, scmd_id(cmd
),
2159 scmd_channel(cmd
) + 'A',
2161 SCB_LIST_NULL
, ROLE_INITIATOR
))
2166 if (pending_scb
== NULL
) {
2167 scmd_printk(KERN_INFO
, cmd
, "Command not found\n");
2171 if ((pending_scb
->flags
& SCB_RECOVERY_SCB
) != 0) {
2173 * We can't queue two recovery actions using the same SCB
2180 * Ensure that the card doesn't do anything
2181 * behind our back and that we didn't "just" miss
2182 * an interrupt that would affect this cmd.
2184 was_paused
= ahc_is_paused(ahc
);
2185 ahc_pause_and_flushwork(ahc
);
2188 if ((pending_scb
->flags
& SCB_ACTIVE
) == 0) {
2189 scmd_printk(KERN_INFO
, cmd
, "Command already completed\n");
2193 printf("%s: At time of recovery, card was %spaused\n",
2194 ahc_name(ahc
), was_paused
? "" : "not ");
2195 ahc_dump_card_state(ahc
);
2197 disconnected
= TRUE
;
2198 if (flag
== SCB_ABORT
) {
2199 if (ahc_search_qinfifo(ahc
, cmd
->device
->id
,
2200 cmd
->device
->channel
+ 'A',
2202 pending_scb
->hscb
->tag
,
2203 ROLE_INITIATOR
, CAM_REQ_ABORTED
,
2204 SEARCH_COMPLETE
) > 0) {
2205 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2206 ahc_name(ahc
), cmd
->device
->channel
,
2207 cmd
->device
->id
, cmd
->device
->lun
);
2211 } else if (ahc_search_qinfifo(ahc
, cmd
->device
->id
,
2212 cmd
->device
->channel
+ 'A',
2213 cmd
->device
->lun
, pending_scb
->hscb
->tag
,
2214 ROLE_INITIATOR
, /*status*/0,
2215 SEARCH_COUNT
) > 0) {
2216 disconnected
= FALSE
;
2219 if (disconnected
&& (ahc_inb(ahc
, SEQ_FLAGS
) & NOT_IDENTIFIED
) == 0) {
2220 struct scb
*bus_scb
;
2222 bus_scb
= ahc_lookup_scb(ahc
, ahc_inb(ahc
, SCB_TAG
));
2223 if (bus_scb
== pending_scb
)
2224 disconnected
= FALSE
;
2225 else if (flag
!= SCB_ABORT
2226 && ahc_inb(ahc
, SAVED_SCSIID
) == pending_scb
->hscb
->scsiid
2227 && ahc_inb(ahc
, SAVED_LUN
) == SCB_GET_LUN(pending_scb
))
2228 disconnected
= FALSE
;
2232 * At this point, pending_scb is the scb associated with the
2233 * passed in command. That command is currently active on the
2234 * bus, is in the disconnected state, or we're hoping to find
2235 * a command for the same target active on the bus to abuse to
2236 * send a BDR. Queue the appropriate message based on which of
2237 * these states we are in.
2239 last_phase
= ahc_inb(ahc
, LASTPHASE
);
2240 saved_scbptr
= ahc_inb(ahc
, SCBPTR
);
2241 active_scb_index
= ahc_inb(ahc
, SCB_TAG
);
2242 saved_scsiid
= ahc_inb(ahc
, SAVED_SCSIID
);
2243 if (last_phase
!= P_BUSFREE
2244 && (pending_scb
->hscb
->tag
== active_scb_index
2245 || (flag
== SCB_DEVICE_RESET
2246 && SCSIID_TARGET(ahc
, saved_scsiid
) == scmd_id(cmd
)))) {
2249 * We're active on the bus, so assert ATN
2250 * and hope that the target responds.
2252 pending_scb
= ahc_lookup_scb(ahc
, active_scb_index
);
2253 pending_scb
->flags
|= SCB_RECOVERY_SCB
|flag
;
2254 ahc_outb(ahc
, MSG_OUT
, HOST_MSG
);
2255 ahc_outb(ahc
, SCSISIGO
, last_phase
|ATNO
);
2256 scmd_printk(KERN_INFO
, cmd
, "Device is active, asserting ATN\n");
2258 } else if (disconnected
) {
2261 * Actually re-queue this SCB in an attempt
2262 * to select the device before it reconnects.
2263 * In either case (selection or reselection),
2264 * we will now issue the approprate message
2265 * to the timed-out device.
2267 * Set the MK_MESSAGE control bit indicating
2268 * that we desire to send a message. We
2269 * also set the disconnected flag since
2270 * in the paging case there is no guarantee
2271 * that our SCB control byte matches the
2272 * version on the card. We don't want the
2273 * sequencer to abort the command thinking
2274 * an unsolicited reselection occurred.
2276 pending_scb
->hscb
->control
|= MK_MESSAGE
|DISCONNECTED
;
2277 pending_scb
->flags
|= SCB_RECOVERY_SCB
|flag
;
2280 * Remove any cached copy of this SCB in the
2281 * disconnected list in preparation for the
2282 * queuing of our abort SCB. We use the
2283 * same element in the SCB, SCB_NEXT, for
2284 * both the qinfifo and the disconnected list.
2286 ahc_search_disc_list(ahc
, cmd
->device
->id
,
2287 cmd
->device
->channel
+ 'A',
2288 cmd
->device
->lun
, pending_scb
->hscb
->tag
,
2289 /*stop_on_first*/TRUE
,
2291 /*save_state*/FALSE
);
2294 * In the non-paging case, the sequencer will
2295 * never re-reference the in-core SCB.
2296 * To make sure we are notified during
2297 * reslection, set the MK_MESSAGE flag in
2298 * the card's copy of the SCB.
2300 if ((ahc
->flags
& AHC_PAGESCBS
) == 0) {
2301 ahc_outb(ahc
, SCBPTR
, pending_scb
->hscb
->tag
);
2302 ahc_outb(ahc
, SCB_CONTROL
,
2303 ahc_inb(ahc
, SCB_CONTROL
)|MK_MESSAGE
);
2307 * Clear out any entries in the QINFIFO first
2308 * so we are the next SCB for this target
2311 ahc_search_qinfifo(ahc
, cmd
->device
->id
,
2312 cmd
->device
->channel
+ 'A',
2313 cmd
->device
->lun
, SCB_LIST_NULL
,
2314 ROLE_INITIATOR
, CAM_REQUEUE_REQ
,
2316 ahc_qinfifo_requeue_tail(ahc
, pending_scb
);
2317 ahc_outb(ahc
, SCBPTR
, saved_scbptr
);
2318 ahc_print_path(ahc
, pending_scb
);
2319 printf("Device is disconnected, re-queuing SCB\n");
2322 scmd_printk(KERN_INFO
, cmd
, "Unable to deliver message\n");
2329 * Our assumption is that if we don't have the command, no
2330 * recovery action was required, so we return success. Again,
2331 * the semantics of the mid-layer recovery engine are not
2332 * well defined, so this may change in time.
2339 DECLARE_COMPLETION(done
);
2341 ahc
->platform_data
->eh_done
= &done
;
2342 ahc_unlock(ahc
, &flags
);
2344 printf("Recovery code sleeping\n");
2345 if (!wait_for_completion_timeout(&done
, 5 * HZ
)) {
2346 ahc_lock(ahc
, &flags
);
2347 ahc
->platform_data
->eh_done
= NULL
;
2348 ahc_unlock(ahc
, &flags
);
2350 printf("Timer Expired\n");
2353 printf("Recovery code awake\n");
2355 ahc_unlock(ahc
, &flags
);
2360 ahc_platform_dump_card_state(struct ahc_softc
*ahc
)
2364 static void ahc_linux_set_width(struct scsi_target
*starget
, int width
)
2366 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2367 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2368 struct ahc_devinfo devinfo
;
2369 unsigned long flags
;
2371 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2372 starget
->channel
+ 'A', ROLE_INITIATOR
);
2373 ahc_lock(ahc
, &flags
);
2374 ahc_set_width(ahc
, &devinfo
, width
, AHC_TRANS_GOAL
, FALSE
);
2375 ahc_unlock(ahc
, &flags
);
2378 static void ahc_linux_set_period(struct scsi_target
*starget
, int period
)
2380 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2381 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2382 struct ahc_tmode_tstate
*tstate
;
2383 struct ahc_initiator_tinfo
*tinfo
2384 = ahc_fetch_transinfo(ahc
,
2385 starget
->channel
+ 'A',
2386 shost
->this_id
, starget
->id
, &tstate
);
2387 struct ahc_devinfo devinfo
;
2388 unsigned int ppr_options
= tinfo
->goal
.ppr_options
;
2389 unsigned long flags
;
2390 unsigned long offset
= tinfo
->goal
.offset
;
2391 struct ahc_syncrate
*syncrate
;
2394 offset
= MAX_OFFSET
;
2397 period
= 9; /* 12.5ns is our minimum */
2399 ppr_options
|= MSG_EXT_PPR_DT_REQ
;
2401 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2402 starget
->channel
+ 'A', ROLE_INITIATOR
);
2404 /* all PPR requests apart from QAS require wide transfers */
2405 if (ppr_options
& ~MSG_EXT_PPR_QAS_REQ
) {
2406 if (spi_width(starget
) == 0)
2407 ppr_options
&= MSG_EXT_PPR_QAS_REQ
;
2410 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2411 ahc_lock(ahc
, &flags
);
2412 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, offset
,
2413 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2414 ahc_unlock(ahc
, &flags
);
2417 static void ahc_linux_set_offset(struct scsi_target
*starget
, int offset
)
2419 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2420 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2421 struct ahc_tmode_tstate
*tstate
;
2422 struct ahc_initiator_tinfo
*tinfo
2423 = ahc_fetch_transinfo(ahc
,
2424 starget
->channel
+ 'A',
2425 shost
->this_id
, starget
->id
, &tstate
);
2426 struct ahc_devinfo devinfo
;
2427 unsigned int ppr_options
= 0;
2428 unsigned int period
= 0;
2429 unsigned long flags
;
2430 struct ahc_syncrate
*syncrate
= NULL
;
2432 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2433 starget
->channel
+ 'A', ROLE_INITIATOR
);
2435 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2436 period
= tinfo
->goal
.period
;
2437 ppr_options
= tinfo
->goal
.ppr_options
;
2439 ahc_lock(ahc
, &flags
);
2440 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, offset
,
2441 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2442 ahc_unlock(ahc
, &flags
);
2445 static void ahc_linux_set_dt(struct scsi_target
*starget
, int dt
)
2447 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2448 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2449 struct ahc_tmode_tstate
*tstate
;
2450 struct ahc_initiator_tinfo
*tinfo
2451 = ahc_fetch_transinfo(ahc
,
2452 starget
->channel
+ 'A',
2453 shost
->this_id
, starget
->id
, &tstate
);
2454 struct ahc_devinfo devinfo
;
2455 unsigned int ppr_options
= tinfo
->goal
.ppr_options
2456 & ~MSG_EXT_PPR_DT_REQ
;
2457 unsigned int period
= tinfo
->goal
.period
;
2458 unsigned int width
= tinfo
->goal
.width
;
2459 unsigned long flags
;
2460 struct ahc_syncrate
*syncrate
;
2463 ppr_options
|= MSG_EXT_PPR_DT_REQ
;
2465 ahc_linux_set_width(starget
, 1);
2466 } else if (period
== 9)
2467 period
= 10; /* if resetting DT, period must be >= 25ns */
2469 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2470 starget
->channel
+ 'A', ROLE_INITIATOR
);
2471 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
,AHC_SYNCRATE_DT
);
2472 ahc_lock(ahc
, &flags
);
2473 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, tinfo
->goal
.offset
,
2474 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2475 ahc_unlock(ahc
, &flags
);
2479 /* FIXME: This code claims to support IU and QAS. However, the actual
2480 * sequencer code and aic7xxx_core have no support for these parameters and
2481 * will get into a bad state if they're negotiated. Do not enable this
2482 * unless you know what you're doing */
2483 static void ahc_linux_set_qas(struct scsi_target
*starget
, int qas
)
2485 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2486 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2487 struct ahc_tmode_tstate
*tstate
;
2488 struct ahc_initiator_tinfo
*tinfo
2489 = ahc_fetch_transinfo(ahc
,
2490 starget
->channel
+ 'A',
2491 shost
->this_id
, starget
->id
, &tstate
);
2492 struct ahc_devinfo devinfo
;
2493 unsigned int ppr_options
= tinfo
->goal
.ppr_options
2494 & ~MSG_EXT_PPR_QAS_REQ
;
2495 unsigned int period
= tinfo
->goal
.period
;
2496 unsigned long flags
;
2497 struct ahc_syncrate
*syncrate
;
2500 ppr_options
|= MSG_EXT_PPR_QAS_REQ
;
2502 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2503 starget
->channel
+ 'A', ROLE_INITIATOR
);
2504 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2505 ahc_lock(ahc
, &flags
);
2506 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, tinfo
->goal
.offset
,
2507 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2508 ahc_unlock(ahc
, &flags
);
2511 static void ahc_linux_set_iu(struct scsi_target
*starget
, int iu
)
2513 struct Scsi_Host
*shost
= dev_to_shost(starget
->dev
.parent
);
2514 struct ahc_softc
*ahc
= *((struct ahc_softc
**)shost
->hostdata
);
2515 struct ahc_tmode_tstate
*tstate
;
2516 struct ahc_initiator_tinfo
*tinfo
2517 = ahc_fetch_transinfo(ahc
,
2518 starget
->channel
+ 'A',
2519 shost
->this_id
, starget
->id
, &tstate
);
2520 struct ahc_devinfo devinfo
;
2521 unsigned int ppr_options
= tinfo
->goal
.ppr_options
2522 & ~MSG_EXT_PPR_IU_REQ
;
2523 unsigned int period
= tinfo
->goal
.period
;
2524 unsigned long flags
;
2525 struct ahc_syncrate
*syncrate
;
2528 ppr_options
|= MSG_EXT_PPR_IU_REQ
;
2530 ahc_compile_devinfo(&devinfo
, shost
->this_id
, starget
->id
, 0,
2531 starget
->channel
+ 'A', ROLE_INITIATOR
);
2532 syncrate
= ahc_find_syncrate(ahc
, &period
, &ppr_options
, AHC_SYNCRATE_DT
);
2533 ahc_lock(ahc
, &flags
);
2534 ahc_set_syncrate(ahc
, &devinfo
, syncrate
, period
, tinfo
->goal
.offset
,
2535 ppr_options
, AHC_TRANS_GOAL
, FALSE
);
2536 ahc_unlock(ahc
, &flags
);
2540 static void ahc_linux_get_signalling(struct Scsi_Host
*shost
)
2542 struct ahc_softc
*ahc
= *(struct ahc_softc
**)shost
->hostdata
;
2543 u8 mode
= ahc_inb(ahc
, SBLKCTL
);
2546 spi_signalling(shost
) = SPI_SIGNAL_LVD
;
2547 else if (mode
& ENAB20
)
2548 spi_signalling(shost
) =
2549 ahc
->features
& AHC_HVD
?
2553 spi_signalling(shost
) = SPI_SIGNAL_UNKNOWN
;
2556 static struct spi_function_template ahc_linux_transport_functions
= {
2557 .set_offset
= ahc_linux_set_offset
,
2559 .set_period
= ahc_linux_set_period
,
2561 .set_width
= ahc_linux_set_width
,
2563 .set_dt
= ahc_linux_set_dt
,
2566 .set_iu
= ahc_linux_set_iu
,
2568 .set_qas
= ahc_linux_set_qas
,
2571 .get_signalling
= ahc_linux_get_signalling
,
2577 ahc_linux_init(void)
2580 * If we've been passed any parameters, process them now.
2583 aic7xxx_setup(aic7xxx
);
2585 ahc_linux_transport_template
=
2586 spi_attach_transport(&ahc_linux_transport_functions
);
2587 if (!ahc_linux_transport_template
)
2590 scsi_transport_reserve_target(ahc_linux_transport_template
,
2591 sizeof(struct ahc_linux_target
));
2592 scsi_transport_reserve_device(ahc_linux_transport_template
,
2593 sizeof(struct ahc_linux_device
));
2595 ahc_linux_pci_init();
2596 ahc_linux_eisa_init();
2601 ahc_linux_exit(void)
2603 ahc_linux_pci_exit();
2604 ahc_linux_eisa_exit();
2605 spi_release_transport(ahc_linux_transport_template
);
2608 module_init(ahc_linux_init
);
2609 module_exit(ahc_linux_exit
);