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[SCSI] aic79xx: Update error recovery
[linux-2.6/libata-dev.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blob00d48a0fb7e14f5a3c49f355b876a8e1bb990404
1 /*
2 * Adaptec AIC79xx device driver for Linux.
3 *
4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $
5 *
6 * --------------------------------------------------------------------------
7 * Copyright (c) 1994-2000 Justin T. Gibbs.
8 * Copyright (c) 1997-1999 Doug Ledford
9 * Copyright (c) 2000-2003 Adaptec Inc.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions, and the following disclaimer,
17 * without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 * substantially similar to the "NO WARRANTY" disclaimer below
20 * ("Disclaimer") and any redistribution must be conditioned upon
21 * including a substantially similar Disclaimer requirement for further
22 * binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45 #include "aic79xx_osm.h"
46 #include "aic79xx_inline.h"
47 #include <scsi/scsicam.h>
48
49 static struct scsi_transport_template *ahd_linux_transport_template = NULL;
50
51 #include <linux/init.h> /* __setup */
52 #include <linux/mm.h> /* For fetching system memory size */
53 #include <linux/blkdev.h> /* For block_size() */
54 #include <linux/delay.h> /* For ssleep/msleep */
55 #include <linux/device.h>
56
57 /*
58 * Bucket size for counting good commands in between bad ones.
59 */
60 #define AHD_LINUX_ERR_THRESH 1000
61
62 /*
63 * Set this to the delay in seconds after SCSI bus reset.
64 * Note, we honor this only for the initial bus reset.
65 * The scsi error recovery code performs its own bus settle
66 * delay handling for error recovery actions.
67 */
68 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS
69 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS
70 #else
71 #define AIC79XX_RESET_DELAY 5000
72 #endif
73
74 /*
75 * To change the default number of tagged transactions allowed per-device,
76 * add a line to the lilo.conf file like:
77 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}"
78 * which will result in the first four devices on the first two
79 * controllers being set to a tagged queue depth of 32.
80 *
81 * The tag_commands is an array of 16 to allow for wide and twin adapters.
82 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15
83 * for channel 1.
84 */
85 typedef struct {
86 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */
87 } adapter_tag_info_t;
88
89 /*
90 * Modify this as you see fit for your system.
91 *
92 * 0 tagged queuing disabled
93 * 1 <= n <= 253 n == max tags ever dispatched.
94 *
95 * The driver will throttle the number of commands dispatched to a
96 * device if it returns queue full. For devices with a fixed maximum
97 * queue depth, the driver will eventually determine this depth and
98 * lock it in (a console message is printed to indicate that a lock
99 * has occurred). On some devices, queue full is returned for a temporary
100 * resource shortage. These devices will return queue full at varying
101 * depths. The driver will throttle back when the queue fulls occur and
102 * attempt to slowly increase the depth over time as the device recovers
103 * from the resource shortage.
104 *
105 * In this example, the first line will disable tagged queueing for all
106 * the devices on the first probed aic79xx adapter.
107 *
108 * The second line enables tagged queueing with 4 commands/LUN for IDs
109 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the
110 * driver to attempt to use up to 64 tags for ID 1.
111 *
112 * The third line is the same as the first line.
113 *
114 * The fourth line disables tagged queueing for devices 0 and 3. It
115 * enables tagged queueing for the other IDs, with 16 commands/LUN
116 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for
117 * IDs 2, 5-7, and 9-15.
118 */
119
120 /*
121 * NOTE: The below structure is for reference only, the actual structure
122 * to modify in order to change things is just below this comment block.
123 adapter_tag_info_t aic79xx_tag_info[] =
124 {
125 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
126 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}},
127 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}},
128 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}}
129 };
130 */
131
132 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE
133 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE
134 #else
135 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE
136 #endif
137
138 #define AIC79XX_CONFIGED_TAG_COMMANDS { \
139 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \
146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \
147 }
148
149 /*
150 * By default, use the number of commands specified by
151 * the users kernel configuration.
152 */
153 static adapter_tag_info_t aic79xx_tag_info[] =
154 {
155 {AIC79XX_CONFIGED_TAG_COMMANDS},
156 {AIC79XX_CONFIGED_TAG_COMMANDS},
157 {AIC79XX_CONFIGED_TAG_COMMANDS},
158 {AIC79XX_CONFIGED_TAG_COMMANDS},
159 {AIC79XX_CONFIGED_TAG_COMMANDS},
160 {AIC79XX_CONFIGED_TAG_COMMANDS},
161 {AIC79XX_CONFIGED_TAG_COMMANDS},
162 {AIC79XX_CONFIGED_TAG_COMMANDS},
163 {AIC79XX_CONFIGED_TAG_COMMANDS},
164 {AIC79XX_CONFIGED_TAG_COMMANDS},
165 {AIC79XX_CONFIGED_TAG_COMMANDS},
166 {AIC79XX_CONFIGED_TAG_COMMANDS},
167 {AIC79XX_CONFIGED_TAG_COMMANDS},
168 {AIC79XX_CONFIGED_TAG_COMMANDS},
169 {AIC79XX_CONFIGED_TAG_COMMANDS},
170 {AIC79XX_CONFIGED_TAG_COMMANDS}
171 };
172
173 /*
174 * The I/O cell on the chip is very configurable in respect to its analog
175 * characteristics. Set the defaults here; they can be overriden with
176 * the proper insmod parameters.
177 */
178 struct ahd_linux_iocell_opts
179 {
180 uint8_t precomp;
181 uint8_t slewrate;
182 uint8_t amplitude;
183 };
184 #define AIC79XX_DEFAULT_PRECOMP 0xFF
185 #define AIC79XX_DEFAULT_SLEWRATE 0xFF
186 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF
187 #define AIC79XX_DEFAULT_IOOPTS \
188 { \
189 AIC79XX_DEFAULT_PRECOMP, \
190 AIC79XX_DEFAULT_SLEWRATE, \
191 AIC79XX_DEFAULT_AMPLITUDE \
192 }
193 #define AIC79XX_PRECOMP_INDEX 0
194 #define AIC79XX_SLEWRATE_INDEX 1
195 #define AIC79XX_AMPLITUDE_INDEX 2
196 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] =
197 {
198 AIC79XX_DEFAULT_IOOPTS,
199 AIC79XX_DEFAULT_IOOPTS,
200 AIC79XX_DEFAULT_IOOPTS,
201 AIC79XX_DEFAULT_IOOPTS,
202 AIC79XX_DEFAULT_IOOPTS,
203 AIC79XX_DEFAULT_IOOPTS,
204 AIC79XX_DEFAULT_IOOPTS,
205 AIC79XX_DEFAULT_IOOPTS,
206 AIC79XX_DEFAULT_IOOPTS,
207 AIC79XX_DEFAULT_IOOPTS,
208 AIC79XX_DEFAULT_IOOPTS,
209 AIC79XX_DEFAULT_IOOPTS,
210 AIC79XX_DEFAULT_IOOPTS,
211 AIC79XX_DEFAULT_IOOPTS,
212 AIC79XX_DEFAULT_IOOPTS,
213 AIC79XX_DEFAULT_IOOPTS
214 };
215
216 /*
217 * There should be a specific return value for this in scsi.h, but
218 * it seems that most drivers ignore it.
219 */
220 #define DID_UNDERFLOW DID_ERROR
221
222 void
223 ahd_print_path(struct ahd_softc *ahd, struct scb *scb)
224 {
225 printk("(scsi%d:%c:%d:%d): ",
226 ahd->platform_data->host->host_no,
227 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X',
228 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1,
229 scb != NULL ? SCB_GET_LUN(scb) : -1);
230 }
231
232 /*
233 * XXX - these options apply unilaterally to _all_ adapters
234 * cards in the system. This should be fixed. Exceptions to this
235 * rule are noted in the comments.
236 */
237
238 /*
239 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This
240 * has no effect on any later resets that might occur due to things like
241 * SCSI bus timeouts.
242 */
243 static uint32_t aic79xx_no_reset;
244
245 /*
246 * Certain PCI motherboards will scan PCI devices from highest to lowest,
247 * others scan from lowest to highest, and they tend to do all kinds of
248 * strange things when they come into contact with PCI bridge chips. The
249 * net result of all this is that the PCI card that is actually used to boot
250 * the machine is very hard to detect. Most motherboards go from lowest
251 * PCI slot number to highest, and the first SCSI controller found is the
252 * one you boot from. The only exceptions to this are when a controller
253 * has its BIOS disabled. So, we by default sort all of our SCSI controllers
254 * from lowest PCI slot number to highest PCI slot number. We also force
255 * all controllers with their BIOS disabled to the end of the list. This
256 * works on *almost* all computers. Where it doesn't work, we have this
257 * option. Setting this option to non-0 will reverse the order of the sort
258 * to highest first, then lowest, but will still leave cards with their BIOS
259 * disabled at the very end. That should fix everyone up unless there are
260 * really strange cirumstances.
261 */
262 static uint32_t aic79xx_reverse_scan;
263
264 /*
265 * Should we force EXTENDED translation on a controller.
266 * 0 == Use whatever is in the SEEPROM or default to off
267 * 1 == Use whatever is in the SEEPROM or default to on
268 */
269 static uint32_t aic79xx_extended;
270
271 /*
272 * PCI bus parity checking of the Adaptec controllers. This is somewhat
273 * dubious at best. To my knowledge, this option has never actually
274 * solved a PCI parity problem, but on certain machines with broken PCI
275 * chipset configurations, it can generate tons of false error messages.
276 * It's included in the driver for completeness.
277 * 0 = Shut off PCI parity check
278 * non-0 = Enable PCI parity check
279 *
280 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
281 * variable to -1 you would actually want to simply pass the variable
282 * name without a number. That will invert the 0 which will result in
283 * -1.
284 */
285 static uint32_t aic79xx_pci_parity = ~0;
286
287 /*
288 * There are lots of broken chipsets in the world. Some of them will
289 * violate the PCI spec when we issue byte sized memory writes to our
290 * controller. I/O mapped register access, if allowed by the given
291 * platform, will work in almost all cases.
292 */
293 uint32_t aic79xx_allow_memio = ~0;
294
295 /*
296 * So that we can set how long each device is given as a selection timeout.
297 * The table of values goes like this:
298 * 0 - 256ms
299 * 1 - 128ms
300 * 2 - 64ms
301 * 3 - 32ms
302 * We default to 256ms because some older devices need a longer time
303 * to respond to initial selection.
304 */
305 static uint32_t aic79xx_seltime;
306
307 /*
308 * Certain devices do not perform any aging on commands. Should the
309 * device be saturated by commands in one portion of the disk, it is
310 * possible for transactions on far away sectors to never be serviced.
311 * To handle these devices, we can periodically send an ordered tag to
312 * force all outstanding transactions to be serviced prior to a new
313 * transaction.
314 */
315 uint32_t aic79xx_periodic_otag;
316
317 /* Some storage boxes are using an LSI chip which has a bug making it
318 * impossible to use aic79xx Rev B chip in 320 speeds. The following
319 * storage boxes have been reported to be buggy:
320 * EonStor 3U 16-Bay: U16U-G3A3
321 * EonStor 2U 12-Bay: U12U-G3A3
322 * SentinelRAID: 2500F R5 / R6
323 * SentinelRAID: 2500F R1
324 * SentinelRAID: 2500F/1500F
325 * SentinelRAID: 150F
326 *
327 * To get around this LSI bug, you can set your board to 160 mode
328 * or you can enable the SLOWCRC bit.
329 */
330 uint32_t aic79xx_slowcrc;
331
332 /*
333 * Module information and settable options.
334 */
335 static char *aic79xx = NULL;
336
337 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>");
338 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver");
339 MODULE_LICENSE("Dual BSD/GPL");
340 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
341 module_param(aic79xx, charp, 0444);
342 MODULE_PARM_DESC(aic79xx,
343 "period delimited, options string.\n"
344 " verbose Enable verbose/diagnostic logging\n"
345 " allow_memio Allow device registers to be memory mapped\n"
346 " debug Bitmask of debug values to enable\n"
347 " no_reset Supress initial bus resets\n"
348 " extended Enable extended geometry on all controllers\n"
349 " periodic_otag Send an ordered tagged transaction\n"
350 " periodically to prevent tag starvation.\n"
351 " This may be required by some older disk\n"
352 " or drives/RAID arrays.\n"
353 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n"
354 " tag_info:<tag_str> Set per-target tag depth\n"
355 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
356 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
357 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
358 " amplitude:<int> Set the signal amplitude (0-7).\n"
359 " seltime:<int> Selection Timeout:\n"
360 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
361 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
362 "\n"
363 " Sample /etc/modprobe.conf line:\n"
364 " Enable verbose logging\n"
365 " Set tag depth on Controller 2/Target 2 to 10 tags\n"
366 " Shorten the selection timeout to 128ms\n"
367 "\n"
368 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
369 "\n");
370
371 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
372 struct scsi_device *,
373 struct scb *);
374 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
375 struct scsi_cmnd *cmd);
376 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
377 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
378 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
379 struct ahd_devinfo *devinfo);
380 static void ahd_linux_device_queue_depth(struct scsi_device *);
381 static int ahd_linux_run_command(struct ahd_softc*,
382 struct ahd_linux_device *,
383 struct scsi_cmnd *);
384 static void ahd_linux_setup_tag_info_global(char *p);
385 static int aic79xx_setup(char *c);
386
387 static int ahd_linux_unit;
388
389
390 /****************************** Inlines ***************************************/
391 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
392
393 static __inline void
394 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
395 {
396 struct scsi_cmnd *cmd;
397 int direction;
398
399 cmd = scb->io_ctx;
400 direction = cmd->sc_data_direction;
401 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
402 if (cmd->use_sg != 0) {
403 struct scatterlist *sg;
404
405 sg = (struct scatterlist *)cmd->request_buffer;
406 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction);
407 } else if (cmd->request_bufflen != 0) {
408 pci_unmap_single(ahd->dev_softc,
409 scb->platform_data->buf_busaddr,
410 cmd->request_bufflen, direction);
411 }
412 }
413
414 /******************************** Macros **************************************/
415 #define BUILD_SCSIID(ahd, cmd) \
416 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
417
418 /*
419 * Return a string describing the driver.
420 */
421 static const char *
422 ahd_linux_info(struct Scsi_Host *host)
423 {
424 static char buffer[512];
425 char ahd_info[256];
426 char *bp;
427 struct ahd_softc *ahd;
428
429 bp = &buffer[0];
430 ahd = *(struct ahd_softc **)host->hostdata;
431 memset(bp, 0, sizeof(buffer));
432 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
433 strcat(bp, AIC79XX_DRIVER_VERSION);
434 strcat(bp, "\n");
435 strcat(bp, " <");
436 strcat(bp, ahd->description);
437 strcat(bp, ">\n");
438 strcat(bp, " ");
439 ahd_controller_info(ahd, ahd_info);
440 strcat(bp, ahd_info);
441 strcat(bp, "\n");
442
443 return (bp);
444 }
445
446 /*
447 * Queue an SCB to the controller.
448 */
449 static int
450 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
451 {
452 struct ahd_softc *ahd;
453 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
454 int rtn = SCSI_MLQUEUE_HOST_BUSY;
455
456 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
457
458 cmd->scsi_done = scsi_done;
459 cmd->result = CAM_REQ_INPROG << 16;
460 rtn = ahd_linux_run_command(ahd, dev, cmd);
461
462 return rtn;
463 }
464
465 static inline struct scsi_target **
466 ahd_linux_target_in_softc(struct scsi_target *starget)
467 {
468 struct ahd_softc *ahd =
469 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
470 unsigned int target_offset;
471
472 target_offset = starget->id;
473 if (starget->channel != 0)
474 target_offset += 8;
475
476 return &ahd->platform_data->starget[target_offset];
477 }
478
479 static int
480 ahd_linux_target_alloc(struct scsi_target *starget)
481 {
482 struct ahd_softc *ahd =
483 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
484 unsigned long flags;
485 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
486 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
487 struct ahd_devinfo devinfo;
488 struct ahd_initiator_tinfo *tinfo;
489 struct ahd_tmode_tstate *tstate;
490 char channel = starget->channel + 'A';
491
492 ahd_lock(ahd, &flags);
493
494 BUG_ON(*ahd_targp != NULL);
495
496 *ahd_targp = starget;
497 memset(targ, 0, sizeof(*targ));
498
499 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
500 starget->id, &tstate);
501 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
502 CAM_LUN_WILDCARD, channel,
503 ROLE_INITIATOR);
504 spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */
505 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0)
506 spi_max_offset(starget) = MAX_OFFSET_PACED_BUG;
507 else
508 spi_max_offset(starget) = MAX_OFFSET_PACED;
509 spi_max_width(starget) = ahd->features & AHD_WIDE;
510
511 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
512 AHD_TRANS_GOAL, /*paused*/FALSE);
513 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
514 AHD_TRANS_GOAL, /*paused*/FALSE);
515 ahd_unlock(ahd, &flags);
516
517 return 0;
518 }
519
520 static void
521 ahd_linux_target_destroy(struct scsi_target *starget)
522 {
523 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
524
525 *ahd_targp = NULL;
526 }
527
528 static int
529 ahd_linux_slave_alloc(struct scsi_device *sdev)
530 {
531 struct ahd_softc *ahd =
532 *((struct ahd_softc **)sdev->host->hostdata);
533 struct scsi_target *starget = sdev->sdev_target;
534 struct ahd_linux_target *targ = scsi_transport_target_data(starget);
535 struct ahd_linux_device *dev;
536
537 if (bootverbose)
538 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
539
540 BUG_ON(targ->sdev[sdev->lun] != NULL);
541
542 dev = scsi_transport_device_data(sdev);
543 memset(dev, 0, sizeof(*dev));
544
545 /*
546 * We start out life using untagged
547 * transactions of which we allow one.
548 */
549 dev->openings = 1;
550
551 /*
552 * Set maxtags to 0. This will be changed if we
553 * later determine that we are dealing with
554 * a tagged queuing capable device.
555 */
556 dev->maxtags = 0;
557
558 targ->sdev[sdev->lun] = sdev;
559
560 return (0);
561 }
562
563 static int
564 ahd_linux_slave_configure(struct scsi_device *sdev)
565 {
566 struct ahd_softc *ahd;
567
568 ahd = *((struct ahd_softc **)sdev->host->hostdata);
569 if (bootverbose)
570 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
571
572 ahd_linux_device_queue_depth(sdev);
573
574 /* Initial Domain Validation */
575 if (!spi_initial_dv(sdev->sdev_target))
576 spi_dv_device(sdev);
577
578 return 0;
579 }
580
581 static void
582 ahd_linux_slave_destroy(struct scsi_device *sdev)
583 {
584 struct ahd_softc *ahd;
585 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
586 struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target);
587
588 ahd = *((struct ahd_softc **)sdev->host->hostdata);
589 if (bootverbose)
590 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id);
591
592 BUG_ON(dev->active);
593
594 targ->sdev[sdev->lun] = NULL;
595
596 }
597
598 #if defined(__i386__)
599 /*
600 * Return the disk geometry for the given SCSI device.
601 */
602 static int
603 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
604 sector_t capacity, int geom[])
605 {
606 uint8_t *bh;
607 int heads;
608 int sectors;
609 int cylinders;
610 int ret;
611 int extended;
612 struct ahd_softc *ahd;
613
614 ahd = *((struct ahd_softc **)sdev->host->hostdata);
615
616 bh = scsi_bios_ptable(bdev);
617 if (bh) {
618 ret = scsi_partsize(bh, capacity,
619 &geom[2], &geom[0], &geom[1]);
620 kfree(bh);
621 if (ret != -1)
622 return (ret);
623 }
624 heads = 64;
625 sectors = 32;
626 cylinders = aic_sector_div(capacity, heads, sectors);
627
628 if (aic79xx_extended != 0)
629 extended = 1;
630 else
631 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
632 if (extended && cylinders >= 1024) {
633 heads = 255;
634 sectors = 63;
635 cylinders = aic_sector_div(capacity, heads, sectors);
636 }
637 geom[0] = heads;
638 geom[1] = sectors;
639 geom[2] = cylinders;
640 return (0);
641 }
642 #endif
643
644 /*
645 * Abort the current SCSI command(s).
646 */
647 static int
648 ahd_linux_abort(struct scsi_cmnd *cmd)
649 {
650 int error;
651
652 error = ahd_linux_queue_abort_cmd(cmd);
653
654 return error;
655 }
656
657 /*
658 * Attempt to send a target reset message to the device that timed out.
659 */
660 static int
661 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
662 {
663 struct ahd_softc *ahd;
664 struct ahd_linux_device *dev;
665 struct scb *reset_scb;
666 u_int cdb_byte;
667 int retval = SUCCESS;
668 int paused;
669 int wait;
670 struct ahd_initiator_tinfo *tinfo;
671 struct ahd_tmode_tstate *tstate;
672 unsigned long flags;
673 DECLARE_COMPLETION(done);
674
675 reset_scb = NULL;
676 paused = FALSE;
677 wait = FALSE;
678 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
679
680 scmd_printk(KERN_INFO, cmd,
681 "Attempting to queue a TARGET RESET message:");
682
683 printf("CDB:");
684 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
685 printf(" 0x%x", cmd->cmnd[cdb_byte]);
686 printf("\n");
687
688 /*
689 * Determine if we currently own this command.
690 */
691 dev = scsi_transport_device_data(cmd->device);
692
693 if (dev == NULL) {
694 /*
695 * No target device for this command exists,
696 * so we must not still own the command.
697 */
698 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
699 return SUCCESS;
700 }
701
702 /*
703 * Generate us a new SCB
704 */
705 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
706 if (!reset_scb) {
707 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
708 return FAILED;
709 }
710
711 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
712 cmd->device->id, &tstate);
713 reset_scb->io_ctx = cmd;
714 reset_scb->platform_data->dev = dev;
715 reset_scb->sg_count = 0;
716 ahd_set_residual(reset_scb, 0);
717 ahd_set_sense_residual(reset_scb, 0);
718 reset_scb->platform_data->xfer_len = 0;
719 reset_scb->hscb->control = 0;
720 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
721 reset_scb->hscb->lun = cmd->device->lun;
722 reset_scb->hscb->cdb_len = 0;
723 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
724 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
725 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
726 reset_scb->flags |= SCB_PACKETIZED;
727 } else {
728 reset_scb->hscb->control |= MK_MESSAGE;
729 }
730 dev->openings--;
731 dev->active++;
732 dev->commands_issued++;
733
734 ahd_lock(ahd, &flags);
735
736 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
737 ahd_queue_scb(ahd, reset_scb);
738
739 ahd->platform_data->eh_done = &done;
740 ahd_unlock(ahd, &flags);
741
742 printf("%s: Device reset code sleeping\n", ahd_name(ahd));
743 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
744 ahd_lock(ahd, &flags);
745 ahd->platform_data->eh_done = NULL;
746 ahd_unlock(ahd, &flags);
747 printf("%s: Device reset timer expired (active %d)\n",
748 ahd_name(ahd), dev->active);
749 retval = FAILED;
750 }
751 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
752
753 return (retval);
754 }
755
756 /*
757 * Reset the SCSI bus.
758 */
759 static int
760 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
761 {
762 struct ahd_softc *ahd;
763 int found;
764
765 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
766 #ifdef AHD_DEBUG
767 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
768 printf("%s: Bus reset called for cmd %p\n",
769 ahd_name(ahd), cmd);
770 #endif
771 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
772 /*initiate reset*/TRUE);
773
774 if (bootverbose)
775 printf("%s: SCSI bus reset delivered. "
776 "%d SCBs aborted.\n", ahd_name(ahd), found);
777
778 return (SUCCESS);
779 }
780
781 struct scsi_host_template aic79xx_driver_template = {
782 .module = THIS_MODULE,
783 .name = "aic79xx",
784 .proc_name = "aic79xx",
785 .proc_info = ahd_linux_proc_info,
786 .info = ahd_linux_info,
787 .queuecommand = ahd_linux_queue,
788 .eh_abort_handler = ahd_linux_abort,
789 .eh_device_reset_handler = ahd_linux_dev_reset,
790 .eh_bus_reset_handler = ahd_linux_bus_reset,
791 #if defined(__i386__)
792 .bios_param = ahd_linux_biosparam,
793 #endif
794 .can_queue = AHD_MAX_QUEUE,
795 .this_id = -1,
796 .cmd_per_lun = 2,
797 .use_clustering = ENABLE_CLUSTERING,
798 .slave_alloc = ahd_linux_slave_alloc,
799 .slave_configure = ahd_linux_slave_configure,
800 .slave_destroy = ahd_linux_slave_destroy,
801 .target_alloc = ahd_linux_target_alloc,
802 .target_destroy = ahd_linux_target_destroy,
803 };
804
805 /******************************** Bus DMA *************************************/
806 int
807 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
808 bus_size_t alignment, bus_size_t boundary,
809 dma_addr_t lowaddr, dma_addr_t highaddr,
810 bus_dma_filter_t *filter, void *filterarg,
811 bus_size_t maxsize, int nsegments,
812 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
813 {
814 bus_dma_tag_t dmat;
815
816 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
817 if (dmat == NULL)
818 return (ENOMEM);
819
820 /*
821 * Linux is very simplistic about DMA memory. For now don't
822 * maintain all specification information. Once Linux supplies
823 * better facilities for doing these operations, or the
824 * needs of this particular driver change, we might need to do
825 * more here.
826 */
827 dmat->alignment = alignment;
828 dmat->boundary = boundary;
829 dmat->maxsize = maxsize;
830 *ret_tag = dmat;
831 return (0);
832 }
833
834 void
835 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
836 {
837 free(dmat, M_DEVBUF);
838 }
839
840 int
841 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
842 int flags, bus_dmamap_t *mapp)
843 {
844 *vaddr = pci_alloc_consistent(ahd->dev_softc,
845 dmat->maxsize, mapp);
846 if (*vaddr == NULL)
847 return (ENOMEM);
848 return(0);
849 }
850
851 void
852 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
853 void* vaddr, bus_dmamap_t map)
854 {
855 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
856 vaddr, map);
857 }
858
859 int
860 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
861 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
862 void *cb_arg, int flags)
863 {
864 /*
865 * Assume for now that this will only be used during
866 * initialization and not for per-transaction buffer mapping.
867 */
868 bus_dma_segment_t stack_sg;
869
870 stack_sg.ds_addr = map;
871 stack_sg.ds_len = dmat->maxsize;
872 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
873 return (0);
874 }
875
876 void
877 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
878 {
879 }
880
881 int
882 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
883 {
884 /* Nothing to do */
885 return (0);
886 }
887
888 /********************* Platform Dependent Functions ***************************/
889 static void
890 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
891 {
892
893 if ((instance >= 0)
894 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) {
895 uint8_t *iocell_info;
896
897 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
898 iocell_info[index] = value & 0xFFFF;
899 if (bootverbose)
900 printf("iocell[%d:%ld] = %d\n", instance, index, value);
901 }
902 }
903
904 static void
905 ahd_linux_setup_tag_info_global(char *p)
906 {
907 int tags, i, j;
908
909 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
910 printf("Setting Global Tags= %d\n", tags);
911
912 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) {
913 for (j = 0; j < AHD_NUM_TARGETS; j++) {
914 aic79xx_tag_info[i].tag_commands[j] = tags;
915 }
916 }
917 }
918
919 static void
920 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
921 {
922
923 if ((instance >= 0) && (targ >= 0)
924 && (instance < NUM_ELEMENTS(aic79xx_tag_info))
925 && (targ < AHD_NUM_TARGETS)) {
926 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
927 if (bootverbose)
928 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
929 }
930 }
931
932 static char *
933 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
934 void (*callback)(u_long, int, int, int32_t),
935 u_long callback_arg)
936 {
937 char *tok_end;
938 char *tok_end2;
939 int i;
940 int instance;
941 int targ;
942 int done;
943 char tok_list[] = {'.', ',', '{', '}', '\0'};
944
945 /* All options use a ':' name/arg separator */
946 if (*opt_arg != ':')
947 return (opt_arg);
948 opt_arg++;
949 instance = -1;
950 targ = -1;
951 done = FALSE;
952 /*
953 * Restore separator that may be in
954 * the middle of our option argument.
955 */
956 tok_end = strchr(opt_arg, '\0');
957 if (tok_end < end)
958 *tok_end = ',';
959 while (!done) {
960 switch (*opt_arg) {
961 case '{':
962 if (instance == -1) {
963 instance = 0;
964 } else {
965 if (depth > 1) {
966 if (targ == -1)
967 targ = 0;
968 } else {
969 printf("Malformed Option %s\n",
970 opt_name);
971 done = TRUE;
972 }
973 }
974 opt_arg++;
975 break;
976 case '}':
977 if (targ != -1)
978 targ = -1;
979 else if (instance != -1)
980 instance = -1;
981 opt_arg++;
982 break;
983 case ',':
984 case '.':
985 if (instance == -1)
986 done = TRUE;
987 else if (targ >= 0)
988 targ++;
989 else if (instance >= 0)
990 instance++;
991 opt_arg++;
992 break;
993 case '\0':
994 done = TRUE;
995 break;
996 default:
997 tok_end = end;
998 for (i = 0; tok_list[i]; i++) {
999 tok_end2 = strchr(opt_arg, tok_list[i]);
1000 if ((tok_end2) && (tok_end2 < tok_end))
1001 tok_end = tok_end2;
1002 }
1003 callback(callback_arg, instance, targ,
1004 simple_strtol(opt_arg, NULL, 0));
1005 opt_arg = tok_end;
1006 break;
1007 }
1008 }
1009 return (opt_arg);
1010 }
1011
1012 /*
1013 * Handle Linux boot parameters. This routine allows for assigning a value
1014 * to a parameter with a ':' between the parameter and the value.
1015 * ie. aic79xx=stpwlev:1,extended
1016 */
1017 static int
1018 aic79xx_setup(char *s)
1019 {
1020 int i, n;
1021 char *p;
1022 char *end;
1023
1024 static struct {
1025 const char *name;
1026 uint32_t *flag;
1027 } options[] = {
1028 { "extended", &aic79xx_extended },
1029 { "no_reset", &aic79xx_no_reset },
1030 { "verbose", &aic79xx_verbose },
1031 { "allow_memio", &aic79xx_allow_memio},
1032 #ifdef AHD_DEBUG
1033 { "debug", &ahd_debug },
1034 #endif
1035 { "reverse_scan", &aic79xx_reverse_scan },
1036 { "periodic_otag", &aic79xx_periodic_otag },
1037 { "pci_parity", &aic79xx_pci_parity },
1038 { "seltime", &aic79xx_seltime },
1039 { "tag_info", NULL },
1040 { "global_tag_depth", NULL},
1041 { "slewrate", NULL },
1042 { "precomp", NULL },
1043 { "amplitude", NULL },
1044 { "slowcrc", &aic79xx_slowcrc },
1045 };
1046
1047 end = strchr(s, '\0');
1048
1049 /*
1050 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS
1051 * will never be 0 in this case.
1052 */
1053 n = 0;
1054
1055 while ((p = strsep(&s, ",.")) != NULL) {
1056 if (*p == '\0')
1057 continue;
1058 for (i = 0; i < NUM_ELEMENTS(options); i++) {
1059
1060 n = strlen(options[i].name);
1061 if (strncmp(options[i].name, p, n) == 0)
1062 break;
1063 }
1064 if (i == NUM_ELEMENTS(options))
1065 continue;
1066
1067 if (strncmp(p, "global_tag_depth", n) == 0) {
1068 ahd_linux_setup_tag_info_global(p + n);
1069 } else if (strncmp(p, "tag_info", n) == 0) {
1070 s = ahd_parse_brace_option("tag_info", p + n, end,
1071 2, ahd_linux_setup_tag_info, 0);
1072 } else if (strncmp(p, "slewrate", n) == 0) {
1073 s = ahd_parse_brace_option("slewrate",
1074 p + n, end, 1, ahd_linux_setup_iocell_info,
1075 AIC79XX_SLEWRATE_INDEX);
1076 } else if (strncmp(p, "precomp", n) == 0) {
1077 s = ahd_parse_brace_option("precomp",
1078 p + n, end, 1, ahd_linux_setup_iocell_info,
1079 AIC79XX_PRECOMP_INDEX);
1080 } else if (strncmp(p, "amplitude", n) == 0) {
1081 s = ahd_parse_brace_option("amplitude",
1082 p + n, end, 1, ahd_linux_setup_iocell_info,
1083 AIC79XX_AMPLITUDE_INDEX);
1084 } else if (p[n] == ':') {
1085 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1086 } else if (!strncmp(p, "verbose", n)) {
1087 *(options[i].flag) = 1;
1088 } else {
1089 *(options[i].flag) ^= 0xFFFFFFFF;
1090 }
1091 }
1092 return 1;
1093 }
1094
1095 __setup("aic79xx=", aic79xx_setup);
1096
1097 uint32_t aic79xx_verbose;
1098
1099 int
1100 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1101 {
1102 char buf[80];
1103 struct Scsi_Host *host;
1104 char *new_name;
1105 u_long s;
1106 int retval;
1107
1108 template->name = ahd->description;
1109 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1110 if (host == NULL)
1111 return (ENOMEM);
1112
1113 *((struct ahd_softc **)host->hostdata) = ahd;
1114 ahd->platform_data->host = host;
1115 host->can_queue = AHD_MAX_QUEUE;
1116 host->cmd_per_lun = 2;
1117 host->sg_tablesize = AHD_NSEG;
1118 host->this_id = ahd->our_id;
1119 host->irq = ahd->platform_data->irq;
1120 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1121 host->max_lun = AHD_NUM_LUNS;
1122 host->max_channel = 0;
1123 host->sg_tablesize = AHD_NSEG;
1124 ahd_lock(ahd, &s);
1125 ahd_set_unit(ahd, ahd_linux_unit++);
1126 ahd_unlock(ahd, &s);
1127 sprintf(buf, "scsi%d", host->host_no);
1128 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1129 if (new_name != NULL) {
1130 strcpy(new_name, buf);
1131 ahd_set_name(ahd, new_name);
1132 }
1133 host->unique_id = ahd->unit;
1134 ahd_linux_initialize_scsi_bus(ahd);
1135 ahd_intr_enable(ahd, TRUE);
1136
1137 host->transportt = ahd_linux_transport_template;
1138
1139 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1140 if (retval) {
1141 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1142 scsi_host_put(host);
1143 return retval;
1144 }
1145
1146 scsi_scan_host(host);
1147 return 0;
1148 }
1149
1150 uint64_t
1151 ahd_linux_get_memsize(void)
1152 {
1153 struct sysinfo si;
1154
1155 si_meminfo(&si);
1156 return ((uint64_t)si.totalram << PAGE_SHIFT);
1157 }
1158
1159 /*
1160 * Place the SCSI bus into a known state by either resetting it,
1161 * or forcing transfer negotiations on the next command to any
1162 * target.
1163 */
1164 static void
1165 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1166 {
1167 u_int target_id;
1168 u_int numtarg;
1169 unsigned long s;
1170
1171 target_id = 0;
1172 numtarg = 0;
1173
1174 if (aic79xx_no_reset != 0)
1175 ahd->flags &= ~AHD_RESET_BUS_A;
1176
1177 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1178 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1179 else
1180 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1181
1182 ahd_lock(ahd, &s);
1183
1184 /*
1185 * Force negotiation to async for all targets that
1186 * will not see an initial bus reset.
1187 */
1188 for (; target_id < numtarg; target_id++) {
1189 struct ahd_devinfo devinfo;
1190 struct ahd_initiator_tinfo *tinfo;
1191 struct ahd_tmode_tstate *tstate;
1192
1193 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1194 target_id, &tstate);
1195 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1196 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1197 ahd_update_neg_request(ahd, &devinfo, tstate,
1198 tinfo, AHD_NEG_ALWAYS);
1199 }
1200 ahd_unlock(ahd, &s);
1201 /* Give the bus some time to recover */
1202 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1203 ahd_freeze_simq(ahd);
1204 msleep(AIC79XX_RESET_DELAY);
1205 ahd_release_simq(ahd);
1206 }
1207 }
1208
1209 int
1210 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1211 {
1212 ahd->platform_data =
1213 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1214 if (ahd->platform_data == NULL)
1215 return (ENOMEM);
1216 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1217 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1218 ahd_lockinit(ahd);
1219 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1220 return (0);
1221 }
1222
1223 void
1224 ahd_platform_free(struct ahd_softc *ahd)
1225 {
1226 struct scsi_target *starget;
1227 int i, j;
1228
1229 if (ahd->platform_data != NULL) {
1230 /* destroy all of the device and target objects */
1231 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1232 starget = ahd->platform_data->starget[i];
1233 if (starget != NULL) {
1234 for (j = 0; j < AHD_NUM_LUNS; j++) {
1235 struct ahd_linux_target *targ =
1236 scsi_transport_target_data(starget);
1237 if (targ->sdev[j] == NULL)
1238 continue;
1239 targ->sdev[j] = NULL;
1240 }
1241 ahd->platform_data->starget[i] = NULL;
1242 }
1243 }
1244
1245 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1246 free_irq(ahd->platform_data->irq, ahd);
1247 if (ahd->tags[0] == BUS_SPACE_PIO
1248 && ahd->bshs[0].ioport != 0)
1249 release_region(ahd->bshs[0].ioport, 256);
1250 if (ahd->tags[1] == BUS_SPACE_PIO
1251 && ahd->bshs[1].ioport != 0)
1252 release_region(ahd->bshs[1].ioport, 256);
1253 if (ahd->tags[0] == BUS_SPACE_MEMIO
1254 && ahd->bshs[0].maddr != NULL) {
1255 iounmap(ahd->bshs[0].maddr);
1256 release_mem_region(ahd->platform_data->mem_busaddr,
1257 0x1000);
1258 }
1259 if (ahd->platform_data->host)
1260 scsi_host_put(ahd->platform_data->host);
1261
1262 free(ahd->platform_data, M_DEVBUF);
1263 }
1264 }
1265
1266 void
1267 ahd_platform_init(struct ahd_softc *ahd)
1268 {
1269 /*
1270 * Lookup and commit any modified IO Cell options.
1271 */
1272 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) {
1273 struct ahd_linux_iocell_opts *iocell_opts;
1274
1275 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1276 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1277 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1278 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1279 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1280 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1281 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1282 }
1283
1284 }
1285
1286 void
1287 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1288 {
1289 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1290 SCB_GET_CHANNEL(ahd, scb),
1291 SCB_GET_LUN(scb), SCB_LIST_NULL,
1292 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1293 }
1294
1295 void
1296 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo,
1297 ahd_queue_alg alg)
1298 {
1299 struct scsi_target *starget;
1300 struct ahd_linux_target *targ;
1301 struct ahd_linux_device *dev;
1302 struct scsi_device *sdev;
1303 int was_queuing;
1304 int now_queuing;
1305
1306 starget = ahd->platform_data->starget[devinfo->target];
1307 targ = scsi_transport_target_data(starget);
1308 BUG_ON(targ == NULL);
1309 sdev = targ->sdev[devinfo->lun];
1310 if (sdev == NULL)
1311 return;
1312
1313 dev = scsi_transport_device_data(sdev);
1314
1315 if (dev == NULL)
1316 return;
1317 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1318 switch (alg) {
1319 default:
1320 case AHD_QUEUE_NONE:
1321 now_queuing = 0;
1322 break;
1323 case AHD_QUEUE_BASIC:
1324 now_queuing = AHD_DEV_Q_BASIC;
1325 break;
1326 case AHD_QUEUE_TAGGED:
1327 now_queuing = AHD_DEV_Q_TAGGED;
1328 break;
1329 }
1330 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1331 && (was_queuing != now_queuing)
1332 && (dev->active != 0)) {
1333 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1334 dev->qfrozen++;
1335 }
1336
1337 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1338 if (now_queuing) {
1339 u_int usertags;
1340
1341 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1342 if (!was_queuing) {
1343 /*
1344 * Start out agressively and allow our
1345 * dynamic queue depth algorithm to take
1346 * care of the rest.
1347 */
1348 dev->maxtags = usertags;
1349 dev->openings = dev->maxtags - dev->active;
1350 }
1351 if (dev->maxtags == 0) {
1352 /*
1353 * Queueing is disabled by the user.
1354 */
1355 dev->openings = 1;
1356 } else if (alg == AHD_QUEUE_TAGGED) {
1357 dev->flags |= AHD_DEV_Q_TAGGED;
1358 if (aic79xx_periodic_otag != 0)
1359 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1360 } else
1361 dev->flags |= AHD_DEV_Q_BASIC;
1362 } else {
1363 /* We can only have one opening. */
1364 dev->maxtags = 0;
1365 dev->openings = 1 - dev->active;
1366 }
1367
1368 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1369 case AHD_DEV_Q_BASIC:
1370 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1371 scsi_activate_tcq(sdev, dev->openings + dev->active);
1372 break;
1373 case AHD_DEV_Q_TAGGED:
1374 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1375 scsi_activate_tcq(sdev, dev->openings + dev->active);
1376 break;
1377 default:
1378 /*
1379 * We allow the OS to queue 2 untagged transactions to
1380 * us at any time even though we can only execute them
1381 * serially on the controller/device. This should
1382 * remove some latency.
1383 */
1384 scsi_deactivate_tcq(sdev, 1);
1385 break;
1386 }
1387 }
1388
1389 int
1390 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1391 int lun, u_int tag, role_t role, uint32_t status)
1392 {
1393 return 0;
1394 }
1395
1396 static u_int
1397 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1398 {
1399 static int warned_user;
1400 u_int tags;
1401
1402 tags = 0;
1403 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1404 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) {
1405
1406 if (warned_user == 0) {
1407 printf(KERN_WARNING
1408 "aic79xx: WARNING: Insufficient tag_info instances\n"
1409 "aic79xx: for installed controllers. Using defaults\n"
1410 "aic79xx: Please update the aic79xx_tag_info array in\n"
1411 "aic79xx: the aic79xx_osm.c source file.\n");
1412 warned_user++;
1413 }
1414 tags = AHD_MAX_QUEUE;
1415 } else {
1416 adapter_tag_info_t *tag_info;
1417
1418 tag_info = &aic79xx_tag_info[ahd->unit];
1419 tags = tag_info->tag_commands[devinfo->target_offset];
1420 if (tags > AHD_MAX_QUEUE)
1421 tags = AHD_MAX_QUEUE;
1422 }
1423 }
1424 return (tags);
1425 }
1426
1427 /*
1428 * Determines the queue depth for a given device.
1429 */
1430 static void
1431 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1432 {
1433 struct ahd_devinfo devinfo;
1434 u_int tags;
1435 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1436
1437 ahd_compile_devinfo(&devinfo,
1438 ahd->our_id,
1439 sdev->sdev_target->id, sdev->lun,
1440 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1441 ROLE_INITIATOR);
1442 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1443 if (tags != 0 && sdev->tagged_supported != 0) {
1444
1445 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED);
1446 ahd_print_devinfo(ahd, &devinfo);
1447 printf("Tagged Queuing enabled. Depth %d\n", tags);
1448 } else {
1449 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE);
1450 }
1451 }
1452
1453 static int
1454 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1455 struct scsi_cmnd *cmd)
1456 {
1457 struct scb *scb;
1458 struct hardware_scb *hscb;
1459 struct ahd_initiator_tinfo *tinfo;
1460 struct ahd_tmode_tstate *tstate;
1461 u_int col_idx;
1462 uint16_t mask;
1463 unsigned long flags;
1464
1465 ahd_lock(ahd, &flags);
1466
1467 /*
1468 * Get an scb to use.
1469 */
1470 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1471 cmd->device->id, &tstate);
1472 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1473 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1474 col_idx = AHD_NEVER_COL_IDX;
1475 } else {
1476 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1477 cmd->device->lun);
1478 }
1479 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1480 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1481 ahd_unlock(ahd, &flags);
1482 return SCSI_MLQUEUE_HOST_BUSY;
1483 }
1484
1485 scb->io_ctx = cmd;
1486 scb->platform_data->dev = dev;
1487 hscb = scb->hscb;
1488 cmd->host_scribble = (char *)scb;
1489
1490 /*
1491 * Fill out basics of the HSCB.
1492 */
1493 hscb->control = 0;
1494 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1495 hscb->lun = cmd->device->lun;
1496 scb->hscb->task_management = 0;
1497 mask = SCB_GET_TARGET_MASK(ahd, scb);
1498
1499 if ((ahd->user_discenable & mask) != 0)
1500 hscb->control |= DISCENB;
1501
1502 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1503 scb->flags |= SCB_PACKETIZED;
1504
1505 if ((tstate->auto_negotiate & mask) != 0) {
1506 scb->flags |= SCB_AUTO_NEGOTIATE;
1507 scb->hscb->control |= MK_MESSAGE;
1508 } else if (cmd->cmnd[0] == INQUIRY
1509 && (tinfo->curr.offset != 0
1510 || tinfo->curr.width != MSG_EXT_WDTR_BUS_8_BIT
1511 || tinfo->curr.ppr_options != 0)
1512 && (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ)==0) {
1513 /*
1514 * The SCSI spec requires inquiry
1515 * commands to complete without
1516 * reporting unit attention conditions.
1517 * Because of this, an inquiry command
1518 * that occurs just after a device is
1519 * reset will result in a data phase
1520 * with mismatched negotiated rates.
1521 * The core already forces a renegotiation
1522 * for reset events that are visible to
1523 * our controller or that we initiate,
1524 * but a third party device reset or a
1525 * hot-plug insertion can still cause this
1526 * issue. Therefore, we force a re-negotiation
1527 * for every inquiry command unless we
1528 * are async.
1529 */
1530 scb->flags |= SCB_NEGOTIATE;
1531 scb->hscb->control |= MK_MESSAGE;
1532 }
1533
1534 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1535 int msg_bytes;
1536 uint8_t tag_msgs[2];
1537
1538 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1539 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1540 hscb->control |= tag_msgs[0];
1541 if (tag_msgs[0] == MSG_ORDERED_TASK)
1542 dev->commands_since_idle_or_otag = 0;
1543 } else
1544 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1545 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1546 hscb->control |= MSG_ORDERED_TASK;
1547 dev->commands_since_idle_or_otag = 0;
1548 } else {
1549 hscb->control |= MSG_SIMPLE_TASK;
1550 }
1551 }
1552
1553 hscb->cdb_len = cmd->cmd_len;
1554 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1555
1556 scb->platform_data->xfer_len = 0;
1557 ahd_set_residual(scb, 0);
1558 ahd_set_sense_residual(scb, 0);
1559 scb->sg_count = 0;
1560 if (cmd->use_sg != 0) {
1561 void *sg;
1562 struct scatterlist *cur_seg;
1563 u_int nseg;
1564 int dir;
1565
1566 cur_seg = (struct scatterlist *)cmd->request_buffer;
1567 dir = cmd->sc_data_direction;
1568 nseg = pci_map_sg(ahd->dev_softc, cur_seg,
1569 cmd->use_sg, dir);
1570 scb->platform_data->xfer_len = 0;
1571 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) {
1572 dma_addr_t addr;
1573 bus_size_t len;
1574
1575 addr = sg_dma_address(cur_seg);
1576 len = sg_dma_len(cur_seg);
1577 scb->platform_data->xfer_len += len;
1578 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1579 /*last*/nseg == 1);
1580 }
1581 } else if (cmd->request_bufflen != 0) {
1582 void *sg;
1583 dma_addr_t addr;
1584 int dir;
1585
1586 sg = scb->sg_list;
1587 dir = cmd->sc_data_direction;
1588 addr = pci_map_single(ahd->dev_softc,
1589 cmd->request_buffer,
1590 cmd->request_bufflen, dir);
1591 scb->platform_data->xfer_len = cmd->request_bufflen;
1592 scb->platform_data->buf_busaddr = addr;
1593 sg = ahd_sg_setup(ahd, scb, sg, addr,
1594 cmd->request_bufflen, /*last*/TRUE);
1595 }
1596
1597 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1598 dev->openings--;
1599 dev->active++;
1600 dev->commands_issued++;
1601
1602 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1603 dev->commands_since_idle_or_otag++;
1604 scb->flags |= SCB_ACTIVE;
1605 ahd_queue_scb(ahd, scb);
1606
1607 ahd_unlock(ahd, &flags);
1608
1609 return 0;
1610 }
1611
1612 /*
1613 * SCSI controller interrupt handler.
1614 */
1615 irqreturn_t
1616 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs)
1617 {
1618 struct ahd_softc *ahd;
1619 u_long flags;
1620 int ours;
1621
1622 ahd = (struct ahd_softc *) dev_id;
1623 ahd_lock(ahd, &flags);
1624 ours = ahd_intr(ahd);
1625 ahd_unlock(ahd, &flags);
1626 return IRQ_RETVAL(ours);
1627 }
1628
1629 void
1630 ahd_send_async(struct ahd_softc *ahd, char channel,
1631 u_int target, u_int lun, ac_code code, void *arg)
1632 {
1633 switch (code) {
1634 case AC_TRANSFER_NEG:
1635 {
1636 char buf[80];
1637 struct scsi_target *starget;
1638 struct info_str info;
1639 struct ahd_initiator_tinfo *tinfo;
1640 struct ahd_tmode_tstate *tstate;
1641 unsigned int target_ppr_options;
1642
1643 BUG_ON(target == CAM_TARGET_WILDCARD);
1644
1645 info.buffer = buf;
1646 info.length = sizeof(buf);
1647 info.offset = 0;
1648 info.pos = 0;
1649 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1650 target, &tstate);
1651
1652 /*
1653 * Don't bother reporting results while
1654 * negotiations are still pending.
1655 */
1656 if (tinfo->curr.period != tinfo->goal.period
1657 || tinfo->curr.width != tinfo->goal.width
1658 || tinfo->curr.offset != tinfo->goal.offset
1659 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1660 if (bootverbose == 0)
1661 break;
1662
1663 /*
1664 * Don't bother reporting results that
1665 * are identical to those last reported.
1666 */
1667 starget = ahd->platform_data->starget[target];
1668 if (starget == NULL)
1669 break;
1670
1671 target_ppr_options =
1672 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1673 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1674 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1675 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1676 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1677 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1678 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1679 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1680
1681 if (tinfo->curr.period == spi_period(starget)
1682 && tinfo->curr.width == spi_width(starget)
1683 && tinfo->curr.offset == spi_offset(starget)
1684 && tinfo->curr.ppr_options == target_ppr_options)
1685 if (bootverbose == 0)
1686 break;
1687
1688 spi_period(starget) = tinfo->curr.period;
1689 spi_width(starget) = tinfo->curr.width;
1690 spi_offset(starget) = tinfo->curr.offset;
1691 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1692 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1693 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1694 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1695 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1696 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1697 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1698 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1699 spi_display_xfer_agreement(starget);
1700 break;
1701 }
1702 case AC_SENT_BDR:
1703 {
1704 WARN_ON(lun != CAM_LUN_WILDCARD);
1705 scsi_report_device_reset(ahd->platform_data->host,
1706 channel - 'A', target);
1707 break;
1708 }
1709 case AC_BUS_RESET:
1710 if (ahd->platform_data->host != NULL) {
1711 scsi_report_bus_reset(ahd->platform_data->host,
1712 channel - 'A');
1713 }
1714 break;
1715 default:
1716 panic("ahd_send_async: Unexpected async event");
1717 }
1718 }
1719
1720 /*
1721 * Calls the higher level scsi done function and frees the scb.
1722 */
1723 void
1724 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1725 {
1726 struct scsi_cmnd *cmd;
1727 struct ahd_linux_device *dev;
1728
1729 if ((scb->flags & SCB_ACTIVE) == 0) {
1730 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1731 ahd_dump_card_state(ahd);
1732 panic("Stopping for safety");
1733 }
1734 LIST_REMOVE(scb, pending_links);
1735 cmd = scb->io_ctx;
1736 dev = scb->platform_data->dev;
1737 dev->active--;
1738 dev->openings++;
1739 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1740 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1741 dev->qfrozen--;
1742 }
1743 ahd_linux_unmap_scb(ahd, scb);
1744
1745 /*
1746 * Guard against stale sense data.
1747 * The Linux mid-layer assumes that sense
1748 * was retrieved anytime the first byte of
1749 * the sense buffer looks "sane".
1750 */
1751 cmd->sense_buffer[0] = 0;
1752 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1753 uint32_t amount_xferred;
1754
1755 amount_xferred =
1756 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1757 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1758 #ifdef AHD_DEBUG
1759 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1760 ahd_print_path(ahd, scb);
1761 printf("Set CAM_UNCOR_PARITY\n");
1762 }
1763 #endif
1764 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1765 #ifdef AHD_REPORT_UNDERFLOWS
1766 /*
1767 * This code is disabled by default as some
1768 * clients of the SCSI system do not properly
1769 * initialize the underflow parameter. This
1770 * results in spurious termination of commands
1771 * that complete as expected (e.g. underflow is
1772 * allowed as command can return variable amounts
1773 * of data.
1774 */
1775 } else if (amount_xferred < scb->io_ctx->underflow) {
1776 u_int i;
1777
1778 ahd_print_path(ahd, scb);
1779 printf("CDB:");
1780 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1781 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1782 printf("\n");
1783 ahd_print_path(ahd, scb);
1784 printf("Saw underflow (%ld of %ld bytes). "
1785 "Treated as error\n",
1786 ahd_get_residual(scb),
1787 ahd_get_transfer_length(scb));
1788 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1789 #endif
1790 } else {
1791 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1792 }
1793 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1794 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1795 }
1796
1797 if (dev->openings == 1
1798 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1799 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1800 dev->tag_success_count++;
1801 /*
1802 * Some devices deal with temporary internal resource
1803 * shortages by returning queue full. When the queue
1804 * full occurrs, we throttle back. Slowly try to get
1805 * back to our previous queue depth.
1806 */
1807 if ((dev->openings + dev->active) < dev->maxtags
1808 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1809 dev->tag_success_count = 0;
1810 dev->openings++;
1811 }
1812
1813 if (dev->active == 0)
1814 dev->commands_since_idle_or_otag = 0;
1815
1816 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1817 printf("Recovery SCB completes\n");
1818 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1819 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1820 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1821
1822 if (ahd->platform_data->eh_done)
1823 complete(ahd->platform_data->eh_done);
1824 }
1825
1826 ahd_free_scb(ahd, scb);
1827 ahd_linux_queue_cmd_complete(ahd, cmd);
1828 }
1829
1830 static void
1831 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1832 struct scsi_device *sdev, struct scb *scb)
1833 {
1834 struct ahd_devinfo devinfo;
1835 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1836
1837 ahd_compile_devinfo(&devinfo,
1838 ahd->our_id,
1839 sdev->sdev_target->id, sdev->lun,
1840 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1841 ROLE_INITIATOR);
1842
1843 /*
1844 * We don't currently trust the mid-layer to
1845 * properly deal with queue full or busy. So,
1846 * when one occurs, we tell the mid-layer to
1847 * unconditionally requeue the command to us
1848 * so that we can retry it ourselves. We also
1849 * implement our own throttling mechanism so
1850 * we don't clobber the device with too many
1851 * commands.
1852 */
1853 switch (ahd_get_scsi_status(scb)) {
1854 default:
1855 break;
1856 case SCSI_STATUS_CHECK_COND:
1857 case SCSI_STATUS_CMD_TERMINATED:
1858 {
1859 struct scsi_cmnd *cmd;
1860
1861 /*
1862 * Copy sense information to the OS's cmd
1863 * structure if it is available.
1864 */
1865 cmd = scb->io_ctx;
1866 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1867 struct scsi_status_iu_header *siu;
1868 u_int sense_size;
1869 u_int sense_offset;
1870
1871 if (scb->flags & SCB_SENSE) {
1872 sense_size = MIN(sizeof(struct scsi_sense_data)
1873 - ahd_get_sense_residual(scb),
1874 sizeof(cmd->sense_buffer));
1875 sense_offset = 0;
1876 } else {
1877 /*
1878 * Copy only the sense data into the provided
1879 * buffer.
1880 */
1881 siu = (struct scsi_status_iu_header *)
1882 scb->sense_data;
1883 sense_size = MIN(scsi_4btoul(siu->sense_length),
1884 sizeof(cmd->sense_buffer));
1885 sense_offset = SIU_SENSE_OFFSET(siu);
1886 }
1887
1888 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
1889 memcpy(cmd->sense_buffer,
1890 ahd_get_sense_buf(ahd, scb)
1891 + sense_offset, sense_size);
1892 cmd->result |= (DRIVER_SENSE << 24);
1893
1894 #ifdef AHD_DEBUG
1895 if (ahd_debug & AHD_SHOW_SENSE) {
1896 int i;
1897
1898 printf("Copied %d bytes of sense data at %d:",
1899 sense_size, sense_offset);
1900 for (i = 0; i < sense_size; i++) {
1901 if ((i & 0xF) == 0)
1902 printf("\n");
1903 printf("0x%x ", cmd->sense_buffer[i]);
1904 }
1905 printf("\n");
1906 }
1907 #endif
1908 }
1909 break;
1910 }
1911 case SCSI_STATUS_QUEUE_FULL:
1912 /*
1913 * By the time the core driver has returned this
1914 * command, all other commands that were queued
1915 * to us but not the device have been returned.
1916 * This ensures that dev->active is equal to
1917 * the number of commands actually queued to
1918 * the device.
1919 */
1920 dev->tag_success_count = 0;
1921 if (dev->active != 0) {
1922 /*
1923 * Drop our opening count to the number
1924 * of commands currently outstanding.
1925 */
1926 dev->openings = 0;
1927 #ifdef AHD_DEBUG
1928 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1929 ahd_print_path(ahd, scb);
1930 printf("Dropping tag count to %d\n",
1931 dev->active);
1932 }
1933 #endif
1934 if (dev->active == dev->tags_on_last_queuefull) {
1935
1936 dev->last_queuefull_same_count++;
1937 /*
1938 * If we repeatedly see a queue full
1939 * at the same queue depth, this
1940 * device has a fixed number of tag
1941 * slots. Lock in this tag depth
1942 * so we stop seeing queue fulls from
1943 * this device.
1944 */
1945 if (dev->last_queuefull_same_count
1946 == AHD_LOCK_TAGS_COUNT) {
1947 dev->maxtags = dev->active;
1948 ahd_print_path(ahd, scb);
1949 printf("Locking max tag count at %d\n",
1950 dev->active);
1951 }
1952 } else {
1953 dev->tags_on_last_queuefull = dev->active;
1954 dev->last_queuefull_same_count = 0;
1955 }
1956 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1957 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1958 ahd_platform_set_tags(ahd, &devinfo,
1959 (dev->flags & AHD_DEV_Q_BASIC)
1960 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1961 break;
1962 }
1963 /*
1964 * Drop down to a single opening, and treat this
1965 * as if the target returned BUSY SCSI status.
1966 */
1967 dev->openings = 1;
1968 ahd_platform_set_tags(ahd, &devinfo,
1969 (dev->flags & AHD_DEV_Q_BASIC)
1970 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1971 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1972 }
1973 }
1974
1975 static void
1976 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1977 {
1978 int status;
1979 int new_status = DID_OK;
1980 int do_fallback = 0;
1981 int scsi_status;
1982
1983 /*
1984 * Map CAM error codes into Linux Error codes. We
1985 * avoid the conversion so that the DV code has the
1986 * full error information available when making
1987 * state change decisions.
1988 */
1989
1990 status = ahd_cmd_get_transaction_status(cmd);
1991 switch (status) {
1992 case CAM_REQ_INPROG:
1993 case CAM_REQ_CMP:
1994 new_status = DID_OK;
1995 break;
1996 case CAM_AUTOSENSE_FAIL:
1997 new_status = DID_ERROR;
1998 /* Fallthrough */
1999 case CAM_SCSI_STATUS_ERROR:
2000 scsi_status = ahd_cmd_get_scsi_status(cmd);
2001
2002 switch(scsi_status) {
2003 case SCSI_STATUS_CMD_TERMINATED:
2004 case SCSI_STATUS_CHECK_COND:
2005 if ((cmd->result >> 24) != DRIVER_SENSE) {
2006 do_fallback = 1;
2007 } else {
2008 struct scsi_sense_data *sense;
2009
2010 sense = (struct scsi_sense_data *)
2011 &cmd->sense_buffer;
2012 if (sense->extra_len >= 5 &&
2013 (sense->add_sense_code == 0x47
2014 || sense->add_sense_code == 0x48))
2015 do_fallback = 1;
2016 }
2017 break;
2018 default:
2019 break;
2020 }
2021 break;
2022 case CAM_REQ_ABORTED:
2023 new_status = DID_ABORT;
2024 break;
2025 case CAM_BUSY:
2026 new_status = DID_BUS_BUSY;
2027 break;
2028 case CAM_REQ_INVALID:
2029 case CAM_PATH_INVALID:
2030 new_status = DID_BAD_TARGET;
2031 break;
2032 case CAM_SEL_TIMEOUT:
2033 new_status = DID_NO_CONNECT;
2034 break;
2035 case CAM_SCSI_BUS_RESET:
2036 case CAM_BDR_SENT:
2037 new_status = DID_RESET;
2038 break;
2039 case CAM_UNCOR_PARITY:
2040 new_status = DID_PARITY;
2041 do_fallback = 1;
2042 break;
2043 case CAM_CMD_TIMEOUT:
2044 new_status = DID_TIME_OUT;
2045 do_fallback = 1;
2046 break;
2047 case CAM_REQ_CMP_ERR:
2048 case CAM_UNEXP_BUSFREE:
2049 case CAM_DATA_RUN_ERR:
2050 new_status = DID_ERROR;
2051 do_fallback = 1;
2052 break;
2053 case CAM_UA_ABORT:
2054 case CAM_NO_HBA:
2055 case CAM_SEQUENCE_FAIL:
2056 case CAM_CCB_LEN_ERR:
2057 case CAM_PROVIDE_FAIL:
2058 case CAM_REQ_TERMIO:
2059 case CAM_UNREC_HBA_ERROR:
2060 case CAM_REQ_TOO_BIG:
2061 new_status = DID_ERROR;
2062 break;
2063 case CAM_REQUEUE_REQ:
2064 new_status = DID_REQUEUE;
2065 break;
2066 default:
2067 /* We should never get here */
2068 new_status = DID_ERROR;
2069 break;
2070 }
2071
2072 if (do_fallback) {
2073 printf("%s: device overrun (status %x) on %d:%d:%d\n",
2074 ahd_name(ahd), status, cmd->device->channel,
2075 cmd->device->id, cmd->device->lun);
2076 }
2077
2078 ahd_cmd_set_transaction_status(cmd, new_status);
2079
2080 cmd->scsi_done(cmd);
2081 }
2082
2083 void
2084 ahd_freeze_simq(struct ahd_softc *ahd)
2085 {
2086 scsi_block_requests(ahd->platform_data->host);
2087 }
2088
2089 void
2090 ahd_release_simq(struct ahd_softc *ahd)
2091 {
2092 scsi_unblock_requests(ahd->platform_data->host);
2093 }
2094
2095 static int
2096 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2097 {
2098 struct ahd_softc *ahd;
2099 struct ahd_linux_device *dev;
2100 struct scb *pending_scb;
2101 u_int saved_scbptr;
2102 u_int active_scbptr;
2103 u_int last_phase;
2104 u_int saved_scsiid;
2105 u_int cdb_byte;
2106 int retval;
2107 int was_paused;
2108 int paused;
2109 int wait;
2110 int disconnected;
2111 ahd_mode_state saved_modes;
2112 unsigned long flags;
2113
2114 pending_scb = NULL;
2115 paused = FALSE;
2116 wait = FALSE;
2117 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2118
2119 scmd_printk(KERN_INFO, cmd,
2120 "Attempting to queue an ABORT message:");
2121
2122 printf("CDB:");
2123 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2124 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2125 printf("\n");
2126
2127 ahd_lock(ahd, &flags);
2128
2129 /*
2130 * First determine if we currently own this command.
2131 * Start by searching the device queue. If not found
2132 * there, check the pending_scb list. If not found
2133 * at all, and the system wanted us to just abort the
2134 * command, return success.
2135 */
2136 dev = scsi_transport_device_data(cmd->device);
2137
2138 if (dev == NULL) {
2139 /*
2140 * No target device for this command exists,
2141 * so we must not still own the command.
2142 */
2143 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2144 retval = SUCCESS;
2145 goto no_cmd;
2146 }
2147
2148 /*
2149 * See if we can find a matching cmd in the pending list.
2150 */
2151 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2152 if (pending_scb->io_ctx == cmd)
2153 break;
2154 }
2155
2156 if (pending_scb == NULL) {
2157 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2158 goto no_cmd;
2159 }
2160
2161 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2162 /*
2163 * We can't queue two recovery actions using the same SCB
2164 */
2165 retval = FAILED;
2166 goto done;
2167 }
2168
2169 /*
2170 * Ensure that the card doesn't do anything
2171 * behind our back. Also make sure that we
2172 * didn't "just" miss an interrupt that would
2173 * affect this cmd.
2174 */
2175 was_paused = ahd_is_paused(ahd);
2176 ahd_pause_and_flushwork(ahd);
2177 paused = TRUE;
2178
2179 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2180 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2181 goto no_cmd;
2182 }
2183
2184 printf("%s: At time of recovery, card was %spaused\n",
2185 ahd_name(ahd), was_paused ? "" : "not ");
2186 ahd_dump_card_state(ahd);
2187
2188 disconnected = TRUE;
2189 if (ahd_search_qinfifo(ahd, cmd->device->id,
2190 cmd->device->channel + 'A',
2191 cmd->device->lun,
2192 pending_scb->hscb->tag,
2193 ROLE_INITIATOR, CAM_REQ_ABORTED,
2194 SEARCH_COMPLETE) > 0) {
2195 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2196 ahd_name(ahd), cmd->device->channel,
2197 cmd->device->id, cmd->device->lun);
2198 retval = SUCCESS;
2199 goto done;
2200 }
2201
2202 saved_modes = ahd_save_modes(ahd);
2203 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2204 last_phase = ahd_inb(ahd, LASTPHASE);
2205 saved_scbptr = ahd_get_scbptr(ahd);
2206 active_scbptr = saved_scbptr;
2207 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2208 struct scb *bus_scb;
2209
2210 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2211 if (bus_scb == pending_scb)
2212 disconnected = FALSE;
2213 }
2214
2215 /*
2216 * At this point, pending_scb is the scb associated with the
2217 * passed in command. That command is currently active on the
2218 * bus or is in the disconnected state.
2219 */
2220 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2221 if (last_phase != P_BUSFREE
2222 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2223
2224 /*
2225 * We're active on the bus, so assert ATN
2226 * and hope that the target responds.
2227 */
2228 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2229 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2230 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2231 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2232 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2233 wait = TRUE;
2234 } else if (disconnected) {
2235
2236 /*
2237 * Actually re-queue this SCB in an attempt
2238 * to select the device before it reconnects.
2239 */
2240 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2241 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2242 pending_scb->hscb->cdb_len = 0;
2243 pending_scb->hscb->task_attribute = 0;
2244 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2245
2246 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2247 /*
2248 * Mark the SCB has having an outstanding
2249 * task management function. Should the command
2250 * complete normally before the task management
2251 * function can be sent, the host will be notified
2252 * to abort our requeued SCB.
2253 */
2254 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2255 pending_scb->hscb->task_management);
2256 } else {
2257 /*
2258 * If non-packetized, set the MK_MESSAGE control
2259 * bit indicating that we desire to send a message.
2260 * We also set the disconnected flag since there is
2261 * no guarantee that our SCB control byte matches
2262 * the version on the card. We don't want the
2263 * sequencer to abort the command thinking an
2264 * unsolicited reselection occurred.
2265 */
2266 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2267
2268 /*
2269 * The sequencer will never re-reference the
2270 * in-core SCB. To make sure we are notified
2271 * during reslection, set the MK_MESSAGE flag in
2272 * the card's copy of the SCB.
2273 */
2274 ahd_outb(ahd, SCB_CONTROL,
2275 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2276 }
2277
2278 /*
2279 * Clear out any entries in the QINFIFO first
2280 * so we are the next SCB for this target
2281 * to run.
2282 */
2283 ahd_search_qinfifo(ahd, cmd->device->id,
2284 cmd->device->channel + 'A', cmd->device->lun,
2285 SCB_LIST_NULL, ROLE_INITIATOR,
2286 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2287 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2288 ahd_set_scbptr(ahd, saved_scbptr);
2289 ahd_print_path(ahd, pending_scb);
2290 printf("Device is disconnected, re-queuing SCB\n");
2291 wait = TRUE;
2292 } else {
2293 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2294 retval = FAILED;
2295 goto done;
2296 }
2297
2298 no_cmd:
2299 /*
2300 * Our assumption is that if we don't have the command, no
2301 * recovery action was required, so we return success. Again,
2302 * the semantics of the mid-layer recovery engine are not
2303 * well defined, so this may change in time.
2304 */
2305 retval = SUCCESS;
2306 done:
2307 if (paused)
2308 ahd_unpause(ahd);
2309 if (wait) {
2310 DECLARE_COMPLETION(done);
2311
2312 ahd->platform_data->eh_done = &done;
2313 ahd_unlock(ahd, &flags);
2314
2315 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2316 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2317 ahd_lock(ahd, &flags);
2318 ahd->platform_data->eh_done = NULL;
2319 ahd_unlock(ahd, &flags);
2320 printf("%s: Timer Expired (active %d)\n",
2321 ahd_name(ahd), dev->active);
2322 retval = FAILED;
2323 }
2324 printf("Recovery code awake\n");
2325 } else
2326 ahd_unlock(ahd, &flags);
2327
2328 if (retval != SUCCESS)
2329 printf("%s: Command abort returning 0x%x\n",
2330 ahd_name(ahd), retval);
2331
2332 return retval;
2333 }
2334
2335 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2336 {
2337 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2338 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2339 struct ahd_devinfo devinfo;
2340 unsigned long flags;
2341
2342 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2343 starget->channel + 'A', ROLE_INITIATOR);
2344 ahd_lock(ahd, &flags);
2345 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2346 ahd_unlock(ahd, &flags);
2347 }
2348
2349 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2350 {
2351 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2352 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2353 struct ahd_tmode_tstate *tstate;
2354 struct ahd_initiator_tinfo *tinfo
2355 = ahd_fetch_transinfo(ahd,
2356 starget->channel + 'A',
2357 shost->this_id, starget->id, &tstate);
2358 struct ahd_devinfo devinfo;
2359 unsigned int ppr_options = tinfo->goal.ppr_options;
2360 unsigned int dt;
2361 unsigned long flags;
2362 unsigned long offset = tinfo->goal.offset;
2363
2364 #ifdef AHD_DEBUG
2365 if ((ahd_debug & AHD_SHOW_DV) != 0)
2366 printf("%s: set period to %d\n", ahd_name(ahd), period);
2367 #endif
2368 if (offset == 0)
2369 offset = MAX_OFFSET;
2370
2371 if (period < 8)
2372 period = 8;
2373 if (period < 10) {
2374 ppr_options |= MSG_EXT_PPR_DT_REQ;
2375 if (period == 8)
2376 ppr_options |= MSG_EXT_PPR_IU_REQ;
2377 }
2378
2379 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2380
2381 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2382 starget->channel + 'A', ROLE_INITIATOR);
2383
2384 /* all PPR requests apart from QAS require wide transfers */
2385 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2386 if (spi_width(starget) == 0)
2387 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2388 }
2389
2390 ahd_find_syncrate(ahd, &period, &ppr_options,
2391 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2392
2393 ahd_lock(ahd, &flags);
2394 ahd_set_syncrate(ahd, &devinfo, period, offset,
2395 ppr_options, AHD_TRANS_GOAL, FALSE);
2396 ahd_unlock(ahd, &flags);
2397 }
2398
2399 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2400 {
2401 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2402 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2403 struct ahd_tmode_tstate *tstate;
2404 struct ahd_initiator_tinfo *tinfo
2405 = ahd_fetch_transinfo(ahd,
2406 starget->channel + 'A',
2407 shost->this_id, starget->id, &tstate);
2408 struct ahd_devinfo devinfo;
2409 unsigned int ppr_options = 0;
2410 unsigned int period = 0;
2411 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2412 unsigned long flags;
2413
2414 #ifdef AHD_DEBUG
2415 if ((ahd_debug & AHD_SHOW_DV) != 0)
2416 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2417 #endif
2418
2419 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2420 starget->channel + 'A', ROLE_INITIATOR);
2421 if (offset != 0) {
2422 period = tinfo->goal.period;
2423 ppr_options = tinfo->goal.ppr_options;
2424 ahd_find_syncrate(ahd, &period, &ppr_options,
2425 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2426 }
2427
2428 ahd_lock(ahd, &flags);
2429 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2430 AHD_TRANS_GOAL, FALSE);
2431 ahd_unlock(ahd, &flags);
2432 }
2433
2434 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2435 {
2436 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2437 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2438 struct ahd_tmode_tstate *tstate;
2439 struct ahd_initiator_tinfo *tinfo
2440 = ahd_fetch_transinfo(ahd,
2441 starget->channel + 'A',
2442 shost->this_id, starget->id, &tstate);
2443 struct ahd_devinfo devinfo;
2444 unsigned int ppr_options = tinfo->goal.ppr_options
2445 & ~MSG_EXT_PPR_DT_REQ;
2446 unsigned int period = tinfo->goal.period;
2447 unsigned int width = tinfo->goal.width;
2448 unsigned long flags;
2449
2450 #ifdef AHD_DEBUG
2451 if ((ahd_debug & AHD_SHOW_DV) != 0)
2452 printf("%s: %s DT\n", ahd_name(ahd),
2453 dt ? "enabling" : "disabling");
2454 #endif
2455 if (dt) {
2456 ppr_options |= MSG_EXT_PPR_DT_REQ;
2457 if (!width)
2458 ahd_linux_set_width(starget, 1);
2459 } else {
2460 if (period <= 9)
2461 period = 10; /* If resetting DT, period must be >= 25ns */
2462 /* IU is invalid without DT set */
2463 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2464 }
2465 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2466 starget->channel + 'A', ROLE_INITIATOR);
2467 ahd_find_syncrate(ahd, &period, &ppr_options,
2468 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2469
2470 ahd_lock(ahd, &flags);
2471 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2472 ppr_options, AHD_TRANS_GOAL, FALSE);
2473 ahd_unlock(ahd, &flags);
2474 }
2475
2476 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2477 {
2478 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2479 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2480 struct ahd_tmode_tstate *tstate;
2481 struct ahd_initiator_tinfo *tinfo
2482 = ahd_fetch_transinfo(ahd,
2483 starget->channel + 'A',
2484 shost->this_id, starget->id, &tstate);
2485 struct ahd_devinfo devinfo;
2486 unsigned int ppr_options = tinfo->goal.ppr_options
2487 & ~MSG_EXT_PPR_QAS_REQ;
2488 unsigned int period = tinfo->goal.period;
2489 unsigned int dt;
2490 unsigned long flags;
2491
2492 #ifdef AHD_DEBUG
2493 if ((ahd_debug & AHD_SHOW_DV) != 0)
2494 printf("%s: %s QAS\n", ahd_name(ahd),
2495 qas ? "enabling" : "disabling");
2496 #endif
2497
2498 if (qas) {
2499 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2500 }
2501
2502 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2503
2504 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2505 starget->channel + 'A', ROLE_INITIATOR);
2506 ahd_find_syncrate(ahd, &period, &ppr_options,
2507 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2508
2509 ahd_lock(ahd, &flags);
2510 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2511 ppr_options, AHD_TRANS_GOAL, FALSE);
2512 ahd_unlock(ahd, &flags);
2513 }
2514
2515 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2516 {
2517 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2518 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2519 struct ahd_tmode_tstate *tstate;
2520 struct ahd_initiator_tinfo *tinfo
2521 = ahd_fetch_transinfo(ahd,
2522 starget->channel + 'A',
2523 shost->this_id, starget->id, &tstate);
2524 struct ahd_devinfo devinfo;
2525 unsigned int ppr_options = tinfo->goal.ppr_options
2526 & ~MSG_EXT_PPR_IU_REQ;
2527 unsigned int period = tinfo->goal.period;
2528 unsigned int dt;
2529 unsigned long flags;
2530
2531 #ifdef AHD_DEBUG
2532 if ((ahd_debug & AHD_SHOW_DV) != 0)
2533 printf("%s: %s IU\n", ahd_name(ahd),
2534 iu ? "enabling" : "disabling");
2535 #endif
2536
2537 if (iu) {
2538 ppr_options |= MSG_EXT_PPR_IU_REQ;
2539 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2540 }
2541
2542 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2543
2544 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2545 starget->channel + 'A', ROLE_INITIATOR);
2546 ahd_find_syncrate(ahd, &period, &ppr_options,
2547 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2548
2549 ahd_lock(ahd, &flags);
2550 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2551 ppr_options, AHD_TRANS_GOAL, FALSE);
2552 ahd_unlock(ahd, &flags);
2553 }
2554
2555 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2556 {
2557 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2558 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2559 struct ahd_tmode_tstate *tstate;
2560 struct ahd_initiator_tinfo *tinfo
2561 = ahd_fetch_transinfo(ahd,
2562 starget->channel + 'A',
2563 shost->this_id, starget->id, &tstate);
2564 struct ahd_devinfo devinfo;
2565 unsigned int ppr_options = tinfo->goal.ppr_options
2566 & ~MSG_EXT_PPR_RD_STRM;
2567 unsigned int period = tinfo->goal.period;
2568 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2569 unsigned long flags;
2570
2571 #ifdef AHD_DEBUG
2572 if ((ahd_debug & AHD_SHOW_DV) != 0)
2573 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2574 rdstrm ? "enabling" : "disabling");
2575 #endif
2576
2577 if (rdstrm)
2578 ppr_options |= MSG_EXT_PPR_RD_STRM;
2579
2580 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2581 starget->channel + 'A', ROLE_INITIATOR);
2582 ahd_find_syncrate(ahd, &period, &ppr_options,
2583 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2584
2585 ahd_lock(ahd, &flags);
2586 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2587 ppr_options, AHD_TRANS_GOAL, FALSE);
2588 ahd_unlock(ahd, &flags);
2589 }
2590
2591 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2592 {
2593 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2594 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2595 struct ahd_tmode_tstate *tstate;
2596 struct ahd_initiator_tinfo *tinfo
2597 = ahd_fetch_transinfo(ahd,
2598 starget->channel + 'A',
2599 shost->this_id, starget->id, &tstate);
2600 struct ahd_devinfo devinfo;
2601 unsigned int ppr_options = tinfo->goal.ppr_options
2602 & ~MSG_EXT_PPR_WR_FLOW;
2603 unsigned int period = tinfo->goal.period;
2604 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2605 unsigned long flags;
2606
2607 #ifdef AHD_DEBUG
2608 if ((ahd_debug & AHD_SHOW_DV) != 0)
2609 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2610 wrflow ? "enabling" : "disabling");
2611 #endif
2612
2613 if (wrflow)
2614 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2615
2616 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2617 starget->channel + 'A', ROLE_INITIATOR);
2618 ahd_find_syncrate(ahd, &period, &ppr_options,
2619 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2620
2621 ahd_lock(ahd, &flags);
2622 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2623 ppr_options, AHD_TRANS_GOAL, FALSE);
2624 ahd_unlock(ahd, &flags);
2625 }
2626
2627 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2628 {
2629 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2630 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2631 struct ahd_tmode_tstate *tstate;
2632 struct ahd_initiator_tinfo *tinfo
2633 = ahd_fetch_transinfo(ahd,
2634 starget->channel + 'A',
2635 shost->this_id, starget->id, &tstate);
2636 struct ahd_devinfo devinfo;
2637 unsigned int ppr_options = tinfo->goal.ppr_options
2638 & ~MSG_EXT_PPR_RTI;
2639 unsigned int period = tinfo->goal.period;
2640 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2641 unsigned long flags;
2642
2643 if ((ahd->features & AHD_RTI) == 0) {
2644 #ifdef AHD_DEBUG
2645 if ((ahd_debug & AHD_SHOW_DV) != 0)
2646 printf("%s: RTI not available\n", ahd_name(ahd));
2647 #endif
2648 return;
2649 }
2650
2651 #ifdef AHD_DEBUG
2652 if ((ahd_debug & AHD_SHOW_DV) != 0)
2653 printf("%s: %s RTI\n", ahd_name(ahd),
2654 rti ? "enabling" : "disabling");
2655 #endif
2656
2657 if (rti)
2658 ppr_options |= MSG_EXT_PPR_RTI;
2659
2660 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2661 starget->channel + 'A', ROLE_INITIATOR);
2662 ahd_find_syncrate(ahd, &period, &ppr_options,
2663 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2664
2665 ahd_lock(ahd, &flags);
2666 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2667 ppr_options, AHD_TRANS_GOAL, FALSE);
2668 ahd_unlock(ahd, &flags);
2669 }
2670
2671 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2672 {
2673 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2674 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2675 struct ahd_tmode_tstate *tstate;
2676 struct ahd_initiator_tinfo *tinfo
2677 = ahd_fetch_transinfo(ahd,
2678 starget->channel + 'A',
2679 shost->this_id, starget->id, &tstate);
2680 struct ahd_devinfo devinfo;
2681 unsigned int ppr_options = tinfo->goal.ppr_options
2682 & ~MSG_EXT_PPR_PCOMP_EN;
2683 unsigned int period = tinfo->goal.period;
2684 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2685 unsigned long flags;
2686
2687 #ifdef AHD_DEBUG
2688 if ((ahd_debug & AHD_SHOW_DV) != 0)
2689 printf("%s: %s Precompensation\n", ahd_name(ahd),
2690 pcomp ? "Enable" : "Disable");
2691 #endif
2692
2693 if (pcomp)
2694 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2695
2696 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2697 starget->channel + 'A', ROLE_INITIATOR);
2698 ahd_find_syncrate(ahd, &period, &ppr_options,
2699 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2700
2701 ahd_lock(ahd, &flags);
2702 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2703 ppr_options, AHD_TRANS_GOAL, FALSE);
2704 ahd_unlock(ahd, &flags);
2705 }
2706
2707 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2708 {
2709 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2710 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2711 struct ahd_tmode_tstate *tstate;
2712 struct ahd_initiator_tinfo *tinfo
2713 = ahd_fetch_transinfo(ahd,
2714 starget->channel + 'A',
2715 shost->this_id, starget->id, &tstate);
2716 struct ahd_devinfo devinfo;
2717 unsigned int ppr_options = tinfo->goal.ppr_options
2718 & ~MSG_EXT_PPR_HOLD_MCS;
2719 unsigned int period = tinfo->goal.period;
2720 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2721 unsigned long flags;
2722
2723 if (hold)
2724 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2725
2726 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2727 starget->channel + 'A', ROLE_INITIATOR);
2728 ahd_find_syncrate(ahd, &period, &ppr_options,
2729 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2730
2731 ahd_lock(ahd, &flags);
2732 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2733 ppr_options, AHD_TRANS_GOAL, FALSE);
2734 ahd_unlock(ahd, &flags);
2735 }
2736
2737
2738
2739 static struct spi_function_template ahd_linux_transport_functions = {
2740 .set_offset = ahd_linux_set_offset,
2741 .show_offset = 1,
2742 .set_period = ahd_linux_set_period,
2743 .show_period = 1,
2744 .set_width = ahd_linux_set_width,
2745 .show_width = 1,
2746 .set_dt = ahd_linux_set_dt,
2747 .show_dt = 1,
2748 .set_iu = ahd_linux_set_iu,
2749 .show_iu = 1,
2750 .set_qas = ahd_linux_set_qas,
2751 .show_qas = 1,
2752 .set_rd_strm = ahd_linux_set_rd_strm,
2753 .show_rd_strm = 1,
2754 .set_wr_flow = ahd_linux_set_wr_flow,
2755 .show_wr_flow = 1,
2756 .set_rti = ahd_linux_set_rti,
2757 .show_rti = 1,
2758 .set_pcomp_en = ahd_linux_set_pcomp_en,
2759 .show_pcomp_en = 1,
2760 .set_hold_mcs = ahd_linux_set_hold_mcs,
2761 .show_hold_mcs = 1,
2762 };
2763
2764 static int __init
2765 ahd_linux_init(void)
2766 {
2767 int error = 0;
2768
2769 /*
2770 * If we've been passed any parameters, process them now.
2771 */
2772 if (aic79xx)
2773 aic79xx_setup(aic79xx);
2774
2775 ahd_linux_transport_template =
2776 spi_attach_transport(&ahd_linux_transport_functions);
2777 if (!ahd_linux_transport_template)
2778 return -ENODEV;
2779
2780 scsi_transport_reserve_target(ahd_linux_transport_template,
2781 sizeof(struct ahd_linux_target));
2782 scsi_transport_reserve_device(ahd_linux_transport_template,
2783 sizeof(struct ahd_linux_device));
2784
2785 error = ahd_linux_pci_init();
2786 if (error)
2787 spi_release_transport(ahd_linux_transport_template);
2788 return error;
2789 }
2790
2791 static void __exit
2792 ahd_linux_exit(void)
2793 {
2794 ahd_linux_pci_exit();
2795 spi_release_transport(ahd_linux_transport_template);
2796 }
2797
2798 module_init(ahd_linux_init);
2799 module_exit(ahd_linux_exit);
Linux 2.6 libata-dev (mirror)