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[SCSI] aic79xx: fix IOMMU mapping failure handling
[linux-2.6/verdex.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blob0081aa357c8b09c7f5f939d76c4bddfd2b8de65f
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 * Should we force EXTENDED translation on a controller.
247 * 0 == Use whatever is in the SEEPROM or default to off
248 * 1 == Use whatever is in the SEEPROM or default to on
249 */
250 static uint32_t aic79xx_extended;
251
252 /*
253 * PCI bus parity checking of the Adaptec controllers. This is somewhat
254 * dubious at best. To my knowledge, this option has never actually
255 * solved a PCI parity problem, but on certain machines with broken PCI
256 * chipset configurations, it can generate tons of false error messages.
257 * It's included in the driver for completeness.
258 * 0 = Shut off PCI parity check
259 * non-0 = Enable PCI parity check
260 *
261 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this
262 * variable to -1 you would actually want to simply pass the variable
263 * name without a number. That will invert the 0 which will result in
264 * -1.
265 */
266 static uint32_t aic79xx_pci_parity = ~0;
267
268 /*
269 * There are lots of broken chipsets in the world. Some of them will
270 * violate the PCI spec when we issue byte sized memory writes to our
271 * controller. I/O mapped register access, if allowed by the given
272 * platform, will work in almost all cases.
273 */
274 uint32_t aic79xx_allow_memio = ~0;
275
276 /*
277 * So that we can set how long each device is given as a selection timeout.
278 * The table of values goes like this:
279 * 0 - 256ms
280 * 1 - 128ms
281 * 2 - 64ms
282 * 3 - 32ms
283 * We default to 256ms because some older devices need a longer time
284 * to respond to initial selection.
285 */
286 static uint32_t aic79xx_seltime;
287
288 /*
289 * Certain devices do not perform any aging on commands. Should the
290 * device be saturated by commands in one portion of the disk, it is
291 * possible for transactions on far away sectors to never be serviced.
292 * To handle these devices, we can periodically send an ordered tag to
293 * force all outstanding transactions to be serviced prior to a new
294 * transaction.
295 */
296 static uint32_t aic79xx_periodic_otag;
297
298 /* Some storage boxes are using an LSI chip which has a bug making it
299 * impossible to use aic79xx Rev B chip in 320 speeds. The following
300 * storage boxes have been reported to be buggy:
301 * EonStor 3U 16-Bay: U16U-G3A3
302 * EonStor 2U 12-Bay: U12U-G3A3
303 * SentinelRAID: 2500F R5 / R6
304 * SentinelRAID: 2500F R1
305 * SentinelRAID: 2500F/1500F
306 * SentinelRAID: 150F
307 *
308 * To get around this LSI bug, you can set your board to 160 mode
309 * or you can enable the SLOWCRC bit.
310 */
311 uint32_t aic79xx_slowcrc;
312
313 /*
314 * Module information and settable options.
315 */
316 static char *aic79xx = NULL;
317
318 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>");
319 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver");
320 MODULE_LICENSE("Dual BSD/GPL");
321 MODULE_VERSION(AIC79XX_DRIVER_VERSION);
322 module_param(aic79xx, charp, 0444);
323 MODULE_PARM_DESC(aic79xx,
324 "period-delimited options string:\n"
325 " verbose Enable verbose/diagnostic logging\n"
326 " allow_memio Allow device registers to be memory mapped\n"
327 " debug Bitmask of debug values to enable\n"
328 " no_reset Suppress initial bus resets\n"
329 " extended Enable extended geometry on all controllers\n"
330 " periodic_otag Send an ordered tagged transaction\n"
331 " periodically to prevent tag starvation.\n"
332 " This may be required by some older disk\n"
333 " or drives/RAID arrays.\n"
334 " tag_info:<tag_str> Set per-target tag depth\n"
335 " global_tag_depth:<int> Global tag depth for all targets on all buses\n"
336 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n"
337 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n"
338 " amplitude:<int> Set the signal amplitude (0-7).\n"
339 " seltime:<int> Selection Timeout:\n"
340 " (0/256ms,1/128ms,2/64ms,3/32ms)\n"
341 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n"
342 "\n"
343 " Sample /etc/modprobe.conf line:\n"
344 " Enable verbose logging\n"
345 " Set tag depth on Controller 2/Target 2 to 10 tags\n"
346 " Shorten the selection timeout to 128ms\n"
347 "\n"
348 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n"
349 );
350
351 static void ahd_linux_handle_scsi_status(struct ahd_softc *,
352 struct scsi_device *,
353 struct scb *);
354 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd,
355 struct scsi_cmnd *cmd);
356 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd);
357 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd);
358 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd,
359 struct ahd_devinfo *devinfo);
360 static void ahd_linux_device_queue_depth(struct scsi_device *);
361 static int ahd_linux_run_command(struct ahd_softc*,
362 struct ahd_linux_device *,
363 struct scsi_cmnd *);
364 static void ahd_linux_setup_tag_info_global(char *p);
365 static int aic79xx_setup(char *c);
366 static void ahd_freeze_simq(struct ahd_softc *ahd);
367 static void ahd_release_simq(struct ahd_softc *ahd);
368
369 static int ahd_linux_unit;
370
371
372 /****************************** Inlines ***************************************/
373 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*);
374
375 static __inline void
376 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb)
377 {
378 struct scsi_cmnd *cmd;
379
380 cmd = scb->io_ctx;
381 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE);
382 scsi_dma_unmap(cmd);
383 }
384
385 /******************************** Macros **************************************/
386 #define BUILD_SCSIID(ahd, cmd) \
387 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id)
388
389 /*
390 * Return a string describing the driver.
391 */
392 static const char *
393 ahd_linux_info(struct Scsi_Host *host)
394 {
395 static char buffer[512];
396 char ahd_info[256];
397 char *bp;
398 struct ahd_softc *ahd;
399
400 bp = &buffer[0];
401 ahd = *(struct ahd_softc **)host->hostdata;
402 memset(bp, 0, sizeof(buffer));
403 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev ");
404 strcat(bp, AIC79XX_DRIVER_VERSION);
405 strcat(bp, "\n");
406 strcat(bp, " <");
407 strcat(bp, ahd->description);
408 strcat(bp, ">\n");
409 strcat(bp, " ");
410 ahd_controller_info(ahd, ahd_info);
411 strcat(bp, ahd_info);
412
413 return (bp);
414 }
415
416 /*
417 * Queue an SCB to the controller.
418 */
419 static int
420 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *))
421 {
422 struct ahd_softc *ahd;
423 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device);
424 int rtn = SCSI_MLQUEUE_HOST_BUSY;
425
426 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
427
428 cmd->scsi_done = scsi_done;
429 cmd->result = CAM_REQ_INPROG << 16;
430 rtn = ahd_linux_run_command(ahd, dev, cmd);
431
432 return rtn;
433 }
434
435 static inline struct scsi_target **
436 ahd_linux_target_in_softc(struct scsi_target *starget)
437 {
438 struct ahd_softc *ahd =
439 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
440 unsigned int target_offset;
441
442 target_offset = starget->id;
443 if (starget->channel != 0)
444 target_offset += 8;
445
446 return &ahd->platform_data->starget[target_offset];
447 }
448
449 static int
450 ahd_linux_target_alloc(struct scsi_target *starget)
451 {
452 struct ahd_softc *ahd =
453 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata);
454 struct seeprom_config *sc = ahd->seep_config;
455 unsigned long flags;
456 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
457 struct ahd_devinfo devinfo;
458 struct ahd_initiator_tinfo *tinfo;
459 struct ahd_tmode_tstate *tstate;
460 char channel = starget->channel + 'A';
461
462 ahd_lock(ahd, &flags);
463
464 BUG_ON(*ahd_targp != NULL);
465
466 *ahd_targp = starget;
467
468 if (sc) {
469 int flags = sc->device_flags[starget->id];
470
471 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
472 starget->id, &tstate);
473
474 if ((flags & CFPACKETIZED) == 0) {
475 /* Do not negotiate packetized transfers */
476 spi_rd_strm(starget) = 0;
477 spi_pcomp_en(starget) = 0;
478 spi_rti(starget) = 0;
479 spi_wr_flow(starget) = 0;
480 spi_hold_mcs(starget) = 0;
481 } else {
482 if ((ahd->features & AHD_RTI) == 0)
483 spi_rti(starget) = 0;
484 }
485
486 if ((flags & CFQAS) == 0)
487 spi_qas(starget) = 0;
488
489 /* Transinfo values have been set to BIOS settings */
490 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0;
491 spi_min_period(starget) = tinfo->user.period;
492 spi_max_offset(starget) = tinfo->user.offset;
493 }
494
495 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
496 starget->id, &tstate);
497 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id,
498 CAM_LUN_WILDCARD, channel,
499 ROLE_INITIATOR);
500 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0,
501 AHD_TRANS_GOAL, /*paused*/FALSE);
502 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT,
503 AHD_TRANS_GOAL, /*paused*/FALSE);
504 ahd_unlock(ahd, &flags);
505
506 return 0;
507 }
508
509 static void
510 ahd_linux_target_destroy(struct scsi_target *starget)
511 {
512 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget);
513
514 *ahd_targp = NULL;
515 }
516
517 static int
518 ahd_linux_slave_alloc(struct scsi_device *sdev)
519 {
520 struct ahd_softc *ahd =
521 *((struct ahd_softc **)sdev->host->hostdata);
522 struct ahd_linux_device *dev;
523
524 if (bootverbose)
525 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id);
526
527 dev = scsi_transport_device_data(sdev);
528 memset(dev, 0, sizeof(*dev));
529
530 /*
531 * We start out life using untagged
532 * transactions of which we allow one.
533 */
534 dev->openings = 1;
535
536 /*
537 * Set maxtags to 0. This will be changed if we
538 * later determine that we are dealing with
539 * a tagged queuing capable device.
540 */
541 dev->maxtags = 0;
542
543 return (0);
544 }
545
546 static int
547 ahd_linux_slave_configure(struct scsi_device *sdev)
548 {
549 struct ahd_softc *ahd;
550
551 ahd = *((struct ahd_softc **)sdev->host->hostdata);
552 if (bootverbose)
553 sdev_printk(KERN_INFO, sdev, "Slave Configure\n");
554
555 ahd_linux_device_queue_depth(sdev);
556
557 /* Initial Domain Validation */
558 if (!spi_initial_dv(sdev->sdev_target))
559 spi_dv_device(sdev);
560
561 return 0;
562 }
563
564 #if defined(__i386__)
565 /*
566 * Return the disk geometry for the given SCSI device.
567 */
568 static int
569 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev,
570 sector_t capacity, int geom[])
571 {
572 uint8_t *bh;
573 int heads;
574 int sectors;
575 int cylinders;
576 int ret;
577 int extended;
578 struct ahd_softc *ahd;
579
580 ahd = *((struct ahd_softc **)sdev->host->hostdata);
581
582 bh = scsi_bios_ptable(bdev);
583 if (bh) {
584 ret = scsi_partsize(bh, capacity,
585 &geom[2], &geom[0], &geom[1]);
586 kfree(bh);
587 if (ret != -1)
588 return (ret);
589 }
590 heads = 64;
591 sectors = 32;
592 cylinders = aic_sector_div(capacity, heads, sectors);
593
594 if (aic79xx_extended != 0)
595 extended = 1;
596 else
597 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0;
598 if (extended && cylinders >= 1024) {
599 heads = 255;
600 sectors = 63;
601 cylinders = aic_sector_div(capacity, heads, sectors);
602 }
603 geom[0] = heads;
604 geom[1] = sectors;
605 geom[2] = cylinders;
606 return (0);
607 }
608 #endif
609
610 /*
611 * Abort the current SCSI command(s).
612 */
613 static int
614 ahd_linux_abort(struct scsi_cmnd *cmd)
615 {
616 int error;
617
618 error = ahd_linux_queue_abort_cmd(cmd);
619
620 return error;
621 }
622
623 /*
624 * Attempt to send a target reset message to the device that timed out.
625 */
626 static int
627 ahd_linux_dev_reset(struct scsi_cmnd *cmd)
628 {
629 struct ahd_softc *ahd;
630 struct ahd_linux_device *dev;
631 struct scb *reset_scb;
632 u_int cdb_byte;
633 int retval = SUCCESS;
634 int paused;
635 int wait;
636 struct ahd_initiator_tinfo *tinfo;
637 struct ahd_tmode_tstate *tstate;
638 unsigned long flags;
639 DECLARE_COMPLETION_ONSTACK(done);
640
641 reset_scb = NULL;
642 paused = FALSE;
643 wait = FALSE;
644 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
645
646 scmd_printk(KERN_INFO, cmd,
647 "Attempting to queue a TARGET RESET message:");
648
649 printf("CDB:");
650 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
651 printf(" 0x%x", cmd->cmnd[cdb_byte]);
652 printf("\n");
653
654 /*
655 * Determine if we currently own this command.
656 */
657 dev = scsi_transport_device_data(cmd->device);
658
659 if (dev == NULL) {
660 /*
661 * No target device for this command exists,
662 * so we must not still own the command.
663 */
664 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
665 return SUCCESS;
666 }
667
668 /*
669 * Generate us a new SCB
670 */
671 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX);
672 if (!reset_scb) {
673 scmd_printk(KERN_INFO, cmd, "No SCB available\n");
674 return FAILED;
675 }
676
677 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
678 cmd->device->id, &tstate);
679 reset_scb->io_ctx = cmd;
680 reset_scb->platform_data->dev = dev;
681 reset_scb->sg_count = 0;
682 ahd_set_residual(reset_scb, 0);
683 ahd_set_sense_residual(reset_scb, 0);
684 reset_scb->platform_data->xfer_len = 0;
685 reset_scb->hscb->control = 0;
686 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd);
687 reset_scb->hscb->lun = cmd->device->lun;
688 reset_scb->hscb->cdb_len = 0;
689 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET;
690 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE;
691 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
692 reset_scb->flags |= SCB_PACKETIZED;
693 } else {
694 reset_scb->hscb->control |= MK_MESSAGE;
695 }
696 dev->openings--;
697 dev->active++;
698 dev->commands_issued++;
699
700 ahd_lock(ahd, &flags);
701
702 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links);
703 ahd_queue_scb(ahd, reset_scb);
704
705 ahd->platform_data->eh_done = &done;
706 ahd_unlock(ahd, &flags);
707
708 printf("%s: Device reset code sleeping\n", ahd_name(ahd));
709 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
710 ahd_lock(ahd, &flags);
711 ahd->platform_data->eh_done = NULL;
712 ahd_unlock(ahd, &flags);
713 printf("%s: Device reset timer expired (active %d)\n",
714 ahd_name(ahd), dev->active);
715 retval = FAILED;
716 }
717 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval);
718
719 return (retval);
720 }
721
722 /*
723 * Reset the SCSI bus.
724 */
725 static int
726 ahd_linux_bus_reset(struct scsi_cmnd *cmd)
727 {
728 struct ahd_softc *ahd;
729 int found;
730 unsigned long flags;
731
732 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
733 #ifdef AHD_DEBUG
734 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0)
735 printf("%s: Bus reset called for cmd %p\n",
736 ahd_name(ahd), cmd);
737 #endif
738 ahd_lock(ahd, &flags);
739
740 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A',
741 /*initiate reset*/TRUE);
742 ahd_unlock(ahd, &flags);
743
744 if (bootverbose)
745 printf("%s: SCSI bus reset delivered. "
746 "%d SCBs aborted.\n", ahd_name(ahd), found);
747
748 return (SUCCESS);
749 }
750
751 struct scsi_host_template aic79xx_driver_template = {
752 .module = THIS_MODULE,
753 .name = "aic79xx",
754 .proc_name = "aic79xx",
755 .proc_info = ahd_linux_proc_info,
756 .info = ahd_linux_info,
757 .queuecommand = ahd_linux_queue,
758 .eh_abort_handler = ahd_linux_abort,
759 .eh_device_reset_handler = ahd_linux_dev_reset,
760 .eh_bus_reset_handler = ahd_linux_bus_reset,
761 #if defined(__i386__)
762 .bios_param = ahd_linux_biosparam,
763 #endif
764 .can_queue = AHD_MAX_QUEUE,
765 .this_id = -1,
766 .max_sectors = 8192,
767 .cmd_per_lun = 2,
768 .use_clustering = ENABLE_CLUSTERING,
769 .slave_alloc = ahd_linux_slave_alloc,
770 .slave_configure = ahd_linux_slave_configure,
771 .target_alloc = ahd_linux_target_alloc,
772 .target_destroy = ahd_linux_target_destroy,
773 };
774
775 /******************************** Bus DMA *************************************/
776 int
777 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
778 bus_size_t alignment, bus_size_t boundary,
779 dma_addr_t lowaddr, dma_addr_t highaddr,
780 bus_dma_filter_t *filter, void *filterarg,
781 bus_size_t maxsize, int nsegments,
782 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
783 {
784 bus_dma_tag_t dmat;
785
786 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
787 if (dmat == NULL)
788 return (ENOMEM);
789
790 /*
791 * Linux is very simplistic about DMA memory. For now don't
792 * maintain all specification information. Once Linux supplies
793 * better facilities for doing these operations, or the
794 * needs of this particular driver change, we might need to do
795 * more here.
796 */
797 dmat->alignment = alignment;
798 dmat->boundary = boundary;
799 dmat->maxsize = maxsize;
800 *ret_tag = dmat;
801 return (0);
802 }
803
804 void
805 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
806 {
807 free(dmat, M_DEVBUF);
808 }
809
810 int
811 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
812 int flags, bus_dmamap_t *mapp)
813 {
814 *vaddr = pci_alloc_consistent(ahd->dev_softc,
815 dmat->maxsize, mapp);
816 if (*vaddr == NULL)
817 return (ENOMEM);
818 return(0);
819 }
820
821 void
822 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
823 void* vaddr, bus_dmamap_t map)
824 {
825 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
826 vaddr, map);
827 }
828
829 int
830 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
831 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
832 void *cb_arg, int flags)
833 {
834 /*
835 * Assume for now that this will only be used during
836 * initialization and not for per-transaction buffer mapping.
837 */
838 bus_dma_segment_t stack_sg;
839
840 stack_sg.ds_addr = map;
841 stack_sg.ds_len = dmat->maxsize;
842 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
843 return (0);
844 }
845
846 void
847 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
848 {
849 }
850
851 int
852 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
853 {
854 /* Nothing to do */
855 return (0);
856 }
857
858 /********************* Platform Dependent Functions ***************************/
859 static void
860 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
861 {
862
863 if ((instance >= 0)
864 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
865 uint8_t *iocell_info;
866
867 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
868 iocell_info[index] = value & 0xFFFF;
869 if (bootverbose)
870 printf("iocell[%d:%ld] = %d\n", instance, index, value);
871 }
872 }
873
874 static void
875 ahd_linux_setup_tag_info_global(char *p)
876 {
877 int tags, i, j;
878
879 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
880 printf("Setting Global Tags= %d\n", tags);
881
882 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
883 for (j = 0; j < AHD_NUM_TARGETS; j++) {
884 aic79xx_tag_info[i].tag_commands[j] = tags;
885 }
886 }
887 }
888
889 static void
890 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
891 {
892
893 if ((instance >= 0) && (targ >= 0)
894 && (instance < ARRAY_SIZE(aic79xx_tag_info))
895 && (targ < AHD_NUM_TARGETS)) {
896 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
897 if (bootverbose)
898 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
899 }
900 }
901
902 static char *
903 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
904 void (*callback)(u_long, int, int, int32_t),
905 u_long callback_arg)
906 {
907 char *tok_end;
908 char *tok_end2;
909 int i;
910 int instance;
911 int targ;
912 int done;
913 char tok_list[] = {'.', ',', '{', '}', '\0'};
914
915 /* All options use a ':' name/arg separator */
916 if (*opt_arg != ':')
917 return (opt_arg);
918 opt_arg++;
919 instance = -1;
920 targ = -1;
921 done = FALSE;
922 /*
923 * Restore separator that may be in
924 * the middle of our option argument.
925 */
926 tok_end = strchr(opt_arg, '\0');
927 if (tok_end < end)
928 *tok_end = ',';
929 while (!done) {
930 switch (*opt_arg) {
931 case '{':
932 if (instance == -1) {
933 instance = 0;
934 } else {
935 if (depth > 1) {
936 if (targ == -1)
937 targ = 0;
938 } else {
939 printf("Malformed Option %s\n",
940 opt_name);
941 done = TRUE;
942 }
943 }
944 opt_arg++;
945 break;
946 case '}':
947 if (targ != -1)
948 targ = -1;
949 else if (instance != -1)
950 instance = -1;
951 opt_arg++;
952 break;
953 case ',':
954 case '.':
955 if (instance == -1)
956 done = TRUE;
957 else if (targ >= 0)
958 targ++;
959 else if (instance >= 0)
960 instance++;
961 opt_arg++;
962 break;
963 case '\0':
964 done = TRUE;
965 break;
966 default:
967 tok_end = end;
968 for (i = 0; tok_list[i]; i++) {
969 tok_end2 = strchr(opt_arg, tok_list[i]);
970 if ((tok_end2) && (tok_end2 < tok_end))
971 tok_end = tok_end2;
972 }
973 callback(callback_arg, instance, targ,
974 simple_strtol(opt_arg, NULL, 0));
975 opt_arg = tok_end;
976 break;
977 }
978 }
979 return (opt_arg);
980 }
981
982 /*
983 * Handle Linux boot parameters. This routine allows for assigning a value
984 * to a parameter with a ':' between the parameter and the value.
985 * ie. aic79xx=stpwlev:1,extended
986 */
987 static int
988 aic79xx_setup(char *s)
989 {
990 int i, n;
991 char *p;
992 char *end;
993
994 static struct {
995 const char *name;
996 uint32_t *flag;
997 } options[] = {
998 { "extended", &aic79xx_extended },
999 { "no_reset", &aic79xx_no_reset },
1000 { "verbose", &aic79xx_verbose },
1001 { "allow_memio", &aic79xx_allow_memio},
1002 #ifdef AHD_DEBUG
1003 { "debug", &ahd_debug },
1004 #endif
1005 { "periodic_otag", &aic79xx_periodic_otag },
1006 { "pci_parity", &aic79xx_pci_parity },
1007 { "seltime", &aic79xx_seltime },
1008 { "tag_info", NULL },
1009 { "global_tag_depth", NULL},
1010 { "slewrate", NULL },
1011 { "precomp", NULL },
1012 { "amplitude", NULL },
1013 { "slowcrc", &aic79xx_slowcrc },
1014 };
1015
1016 end = strchr(s, '\0');
1017
1018 /*
1019 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1020 * will never be 0 in this case.
1021 */
1022 n = 0;
1023
1024 while ((p = strsep(&s, ",.")) != NULL) {
1025 if (*p == '\0')
1026 continue;
1027 for (i = 0; i < ARRAY_SIZE(options); i++) {
1028
1029 n = strlen(options[i].name);
1030 if (strncmp(options[i].name, p, n) == 0)
1031 break;
1032 }
1033 if (i == ARRAY_SIZE(options))
1034 continue;
1035
1036 if (strncmp(p, "global_tag_depth", n) == 0) {
1037 ahd_linux_setup_tag_info_global(p + n);
1038 } else if (strncmp(p, "tag_info", n) == 0) {
1039 s = ahd_parse_brace_option("tag_info", p + n, end,
1040 2, ahd_linux_setup_tag_info, 0);
1041 } else if (strncmp(p, "slewrate", n) == 0) {
1042 s = ahd_parse_brace_option("slewrate",
1043 p + n, end, 1, ahd_linux_setup_iocell_info,
1044 AIC79XX_SLEWRATE_INDEX);
1045 } else if (strncmp(p, "precomp", n) == 0) {
1046 s = ahd_parse_brace_option("precomp",
1047 p + n, end, 1, ahd_linux_setup_iocell_info,
1048 AIC79XX_PRECOMP_INDEX);
1049 } else if (strncmp(p, "amplitude", n) == 0) {
1050 s = ahd_parse_brace_option("amplitude",
1051 p + n, end, 1, ahd_linux_setup_iocell_info,
1052 AIC79XX_AMPLITUDE_INDEX);
1053 } else if (p[n] == ':') {
1054 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1055 } else if (!strncmp(p, "verbose", n)) {
1056 *(options[i].flag) = 1;
1057 } else {
1058 *(options[i].flag) ^= 0xFFFFFFFF;
1059 }
1060 }
1061 return 1;
1062 }
1063
1064 __setup("aic79xx=", aic79xx_setup);
1065
1066 uint32_t aic79xx_verbose;
1067
1068 int
1069 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1070 {
1071 char buf[80];
1072 struct Scsi_Host *host;
1073 char *new_name;
1074 u_long s;
1075 int retval;
1076
1077 template->name = ahd->description;
1078 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1079 if (host == NULL)
1080 return (ENOMEM);
1081
1082 *((struct ahd_softc **)host->hostdata) = ahd;
1083 ahd->platform_data->host = host;
1084 host->can_queue = AHD_MAX_QUEUE;
1085 host->cmd_per_lun = 2;
1086 host->sg_tablesize = AHD_NSEG;
1087 host->this_id = ahd->our_id;
1088 host->irq = ahd->platform_data->irq;
1089 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1090 host->max_lun = AHD_NUM_LUNS;
1091 host->max_channel = 0;
1092 host->sg_tablesize = AHD_NSEG;
1093 ahd_lock(ahd, &s);
1094 ahd_set_unit(ahd, ahd_linux_unit++);
1095 ahd_unlock(ahd, &s);
1096 sprintf(buf, "scsi%d", host->host_no);
1097 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1098 if (new_name != NULL) {
1099 strcpy(new_name, buf);
1100 ahd_set_name(ahd, new_name);
1101 }
1102 host->unique_id = ahd->unit;
1103 ahd_linux_initialize_scsi_bus(ahd);
1104 ahd_intr_enable(ahd, TRUE);
1105
1106 host->transportt = ahd_linux_transport_template;
1107
1108 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1109 if (retval) {
1110 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1111 scsi_host_put(host);
1112 return retval;
1113 }
1114
1115 scsi_scan_host(host);
1116 return 0;
1117 }
1118
1119 /*
1120 * Place the SCSI bus into a known state by either resetting it,
1121 * or forcing transfer negotiations on the next command to any
1122 * target.
1123 */
1124 static void
1125 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1126 {
1127 u_int target_id;
1128 u_int numtarg;
1129 unsigned long s;
1130
1131 target_id = 0;
1132 numtarg = 0;
1133
1134 if (aic79xx_no_reset != 0)
1135 ahd->flags &= ~AHD_RESET_BUS_A;
1136
1137 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1138 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1139 else
1140 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1141
1142 ahd_lock(ahd, &s);
1143
1144 /*
1145 * Force negotiation to async for all targets that
1146 * will not see an initial bus reset.
1147 */
1148 for (; target_id < numtarg; target_id++) {
1149 struct ahd_devinfo devinfo;
1150 struct ahd_initiator_tinfo *tinfo;
1151 struct ahd_tmode_tstate *tstate;
1152
1153 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1154 target_id, &tstate);
1155 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1156 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1157 ahd_update_neg_request(ahd, &devinfo, tstate,
1158 tinfo, AHD_NEG_ALWAYS);
1159 }
1160 ahd_unlock(ahd, &s);
1161 /* Give the bus some time to recover */
1162 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1163 ahd_freeze_simq(ahd);
1164 msleep(AIC79XX_RESET_DELAY);
1165 ahd_release_simq(ahd);
1166 }
1167 }
1168
1169 int
1170 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1171 {
1172 ahd->platform_data =
1173 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1174 if (ahd->platform_data == NULL)
1175 return (ENOMEM);
1176 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1177 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1178 ahd_lockinit(ahd);
1179 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1180 return (0);
1181 }
1182
1183 void
1184 ahd_platform_free(struct ahd_softc *ahd)
1185 {
1186 struct scsi_target *starget;
1187 int i;
1188
1189 if (ahd->platform_data != NULL) {
1190 /* destroy all of the device and target objects */
1191 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1192 starget = ahd->platform_data->starget[i];
1193 if (starget != NULL) {
1194 ahd->platform_data->starget[i] = NULL;
1195 }
1196 }
1197
1198 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1199 free_irq(ahd->platform_data->irq, ahd);
1200 if (ahd->tags[0] == BUS_SPACE_PIO
1201 && ahd->bshs[0].ioport != 0)
1202 release_region(ahd->bshs[0].ioport, 256);
1203 if (ahd->tags[1] == BUS_SPACE_PIO
1204 && ahd->bshs[1].ioport != 0)
1205 release_region(ahd->bshs[1].ioport, 256);
1206 if (ahd->tags[0] == BUS_SPACE_MEMIO
1207 && ahd->bshs[0].maddr != NULL) {
1208 iounmap(ahd->bshs[0].maddr);
1209 release_mem_region(ahd->platform_data->mem_busaddr,
1210 0x1000);
1211 }
1212 if (ahd->platform_data->host)
1213 scsi_host_put(ahd->platform_data->host);
1214
1215 free(ahd->platform_data, M_DEVBUF);
1216 }
1217 }
1218
1219 void
1220 ahd_platform_init(struct ahd_softc *ahd)
1221 {
1222 /*
1223 * Lookup and commit any modified IO Cell options.
1224 */
1225 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1226 struct ahd_linux_iocell_opts *iocell_opts;
1227
1228 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1229 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1230 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1231 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1232 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1233 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1234 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1235 }
1236
1237 }
1238
1239 void
1240 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1241 {
1242 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1243 SCB_GET_CHANNEL(ahd, scb),
1244 SCB_GET_LUN(scb), SCB_LIST_NULL,
1245 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1246 }
1247
1248 void
1249 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1250 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1251 {
1252 struct ahd_linux_device *dev;
1253 int was_queuing;
1254 int now_queuing;
1255
1256 if (sdev == NULL)
1257 return;
1258
1259 dev = scsi_transport_device_data(sdev);
1260
1261 if (dev == NULL)
1262 return;
1263 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1264 switch (alg) {
1265 default:
1266 case AHD_QUEUE_NONE:
1267 now_queuing = 0;
1268 break;
1269 case AHD_QUEUE_BASIC:
1270 now_queuing = AHD_DEV_Q_BASIC;
1271 break;
1272 case AHD_QUEUE_TAGGED:
1273 now_queuing = AHD_DEV_Q_TAGGED;
1274 break;
1275 }
1276 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1277 && (was_queuing != now_queuing)
1278 && (dev->active != 0)) {
1279 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1280 dev->qfrozen++;
1281 }
1282
1283 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1284 if (now_queuing) {
1285 u_int usertags;
1286
1287 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1288 if (!was_queuing) {
1289 /*
1290 * Start out agressively and allow our
1291 * dynamic queue depth algorithm to take
1292 * care of the rest.
1293 */
1294 dev->maxtags = usertags;
1295 dev->openings = dev->maxtags - dev->active;
1296 }
1297 if (dev->maxtags == 0) {
1298 /*
1299 * Queueing is disabled by the user.
1300 */
1301 dev->openings = 1;
1302 } else if (alg == AHD_QUEUE_TAGGED) {
1303 dev->flags |= AHD_DEV_Q_TAGGED;
1304 if (aic79xx_periodic_otag != 0)
1305 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1306 } else
1307 dev->flags |= AHD_DEV_Q_BASIC;
1308 } else {
1309 /* We can only have one opening. */
1310 dev->maxtags = 0;
1311 dev->openings = 1 - dev->active;
1312 }
1313
1314 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1315 case AHD_DEV_Q_BASIC:
1316 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1317 scsi_activate_tcq(sdev, dev->openings + dev->active);
1318 break;
1319 case AHD_DEV_Q_TAGGED:
1320 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1321 scsi_activate_tcq(sdev, dev->openings + dev->active);
1322 break;
1323 default:
1324 /*
1325 * We allow the OS to queue 2 untagged transactions to
1326 * us at any time even though we can only execute them
1327 * serially on the controller/device. This should
1328 * remove some latency.
1329 */
1330 scsi_deactivate_tcq(sdev, 1);
1331 break;
1332 }
1333 }
1334
1335 int
1336 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1337 int lun, u_int tag, role_t role, uint32_t status)
1338 {
1339 return 0;
1340 }
1341
1342 static u_int
1343 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1344 {
1345 static int warned_user;
1346 u_int tags;
1347
1348 tags = 0;
1349 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1350 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1351
1352 if (warned_user == 0) {
1353 printf(KERN_WARNING
1354 "aic79xx: WARNING: Insufficient tag_info instances\n"
1355 "aic79xx: for installed controllers. Using defaults\n"
1356 "aic79xx: Please update the aic79xx_tag_info array in\n"
1357 "aic79xx: the aic79xx_osm.c source file.\n");
1358 warned_user++;
1359 }
1360 tags = AHD_MAX_QUEUE;
1361 } else {
1362 adapter_tag_info_t *tag_info;
1363
1364 tag_info = &aic79xx_tag_info[ahd->unit];
1365 tags = tag_info->tag_commands[devinfo->target_offset];
1366 if (tags > AHD_MAX_QUEUE)
1367 tags = AHD_MAX_QUEUE;
1368 }
1369 }
1370 return (tags);
1371 }
1372
1373 /*
1374 * Determines the queue depth for a given device.
1375 */
1376 static void
1377 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1378 {
1379 struct ahd_devinfo devinfo;
1380 u_int tags;
1381 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1382
1383 ahd_compile_devinfo(&devinfo,
1384 ahd->our_id,
1385 sdev->sdev_target->id, sdev->lun,
1386 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1387 ROLE_INITIATOR);
1388 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1389 if (tags != 0 && sdev->tagged_supported != 0) {
1390
1391 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1392 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1393 devinfo.lun, AC_TRANSFER_NEG);
1394 ahd_print_devinfo(ahd, &devinfo);
1395 printf("Tagged Queuing enabled. Depth %d\n", tags);
1396 } else {
1397 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1398 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1399 devinfo.lun, AC_TRANSFER_NEG);
1400 }
1401 }
1402
1403 static int
1404 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1405 struct scsi_cmnd *cmd)
1406 {
1407 struct scb *scb;
1408 struct hardware_scb *hscb;
1409 struct ahd_initiator_tinfo *tinfo;
1410 struct ahd_tmode_tstate *tstate;
1411 u_int col_idx;
1412 uint16_t mask;
1413 unsigned long flags;
1414 int nseg;
1415
1416 nseg = scsi_dma_map(cmd);
1417 if (nseg < 0)
1418 return SCSI_MLQUEUE_HOST_BUSY;
1419
1420 ahd_lock(ahd, &flags);
1421
1422 /*
1423 * Get an scb to use.
1424 */
1425 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1426 cmd->device->id, &tstate);
1427 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1428 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1429 col_idx = AHD_NEVER_COL_IDX;
1430 } else {
1431 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1432 cmd->device->lun);
1433 }
1434 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1435 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1436 ahd_unlock(ahd, &flags);
1437 scsi_dma_unmap(cmd);
1438 return SCSI_MLQUEUE_HOST_BUSY;
1439 }
1440
1441 scb->io_ctx = cmd;
1442 scb->platform_data->dev = dev;
1443 hscb = scb->hscb;
1444 cmd->host_scribble = (char *)scb;
1445
1446 /*
1447 * Fill out basics of the HSCB.
1448 */
1449 hscb->control = 0;
1450 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1451 hscb->lun = cmd->device->lun;
1452 scb->hscb->task_management = 0;
1453 mask = SCB_GET_TARGET_MASK(ahd, scb);
1454
1455 if ((ahd->user_discenable & mask) != 0)
1456 hscb->control |= DISCENB;
1457
1458 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1459 scb->flags |= SCB_PACKETIZED;
1460
1461 if ((tstate->auto_negotiate & mask) != 0) {
1462 scb->flags |= SCB_AUTO_NEGOTIATE;
1463 scb->hscb->control |= MK_MESSAGE;
1464 }
1465
1466 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1467 int msg_bytes;
1468 uint8_t tag_msgs[2];
1469
1470 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1471 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1472 hscb->control |= tag_msgs[0];
1473 if (tag_msgs[0] == MSG_ORDERED_TASK)
1474 dev->commands_since_idle_or_otag = 0;
1475 } else
1476 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1477 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1478 hscb->control |= MSG_ORDERED_TASK;
1479 dev->commands_since_idle_or_otag = 0;
1480 } else {
1481 hscb->control |= MSG_SIMPLE_TASK;
1482 }
1483 }
1484
1485 hscb->cdb_len = cmd->cmd_len;
1486 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1487
1488 scb->platform_data->xfer_len = 0;
1489 ahd_set_residual(scb, 0);
1490 ahd_set_sense_residual(scb, 0);
1491 scb->sg_count = 0;
1492
1493 if (nseg > 0) {
1494 void *sg = scb->sg_list;
1495 struct scatterlist *cur_seg;
1496 int i;
1497
1498 scb->platform_data->xfer_len = 0;
1499
1500 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1501 dma_addr_t addr;
1502 bus_size_t len;
1503
1504 addr = sg_dma_address(cur_seg);
1505 len = sg_dma_len(cur_seg);
1506 scb->platform_data->xfer_len += len;
1507 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1508 i == (nseg - 1));
1509 }
1510 }
1511
1512 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1513 dev->openings--;
1514 dev->active++;
1515 dev->commands_issued++;
1516
1517 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1518 dev->commands_since_idle_or_otag++;
1519 scb->flags |= SCB_ACTIVE;
1520 ahd_queue_scb(ahd, scb);
1521
1522 ahd_unlock(ahd, &flags);
1523
1524 return 0;
1525 }
1526
1527 /*
1528 * SCSI controller interrupt handler.
1529 */
1530 irqreturn_t
1531 ahd_linux_isr(int irq, void *dev_id)
1532 {
1533 struct ahd_softc *ahd;
1534 u_long flags;
1535 int ours;
1536
1537 ahd = (struct ahd_softc *) dev_id;
1538 ahd_lock(ahd, &flags);
1539 ours = ahd_intr(ahd);
1540 ahd_unlock(ahd, &flags);
1541 return IRQ_RETVAL(ours);
1542 }
1543
1544 void
1545 ahd_send_async(struct ahd_softc *ahd, char channel,
1546 u_int target, u_int lun, ac_code code)
1547 {
1548 switch (code) {
1549 case AC_TRANSFER_NEG:
1550 {
1551 char buf[80];
1552 struct scsi_target *starget;
1553 struct info_str info;
1554 struct ahd_initiator_tinfo *tinfo;
1555 struct ahd_tmode_tstate *tstate;
1556 unsigned int target_ppr_options;
1557
1558 BUG_ON(target == CAM_TARGET_WILDCARD);
1559
1560 info.buffer = buf;
1561 info.length = sizeof(buf);
1562 info.offset = 0;
1563 info.pos = 0;
1564 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1565 target, &tstate);
1566
1567 /*
1568 * Don't bother reporting results while
1569 * negotiations are still pending.
1570 */
1571 if (tinfo->curr.period != tinfo->goal.period
1572 || tinfo->curr.width != tinfo->goal.width
1573 || tinfo->curr.offset != tinfo->goal.offset
1574 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1575 if (bootverbose == 0)
1576 break;
1577
1578 /*
1579 * Don't bother reporting results that
1580 * are identical to those last reported.
1581 */
1582 starget = ahd->platform_data->starget[target];
1583 if (starget == NULL)
1584 break;
1585
1586 target_ppr_options =
1587 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1588 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1589 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1590 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1591 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1592 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1593 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1594 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1595
1596 if (tinfo->curr.period == spi_period(starget)
1597 && tinfo->curr.width == spi_width(starget)
1598 && tinfo->curr.offset == spi_offset(starget)
1599 && tinfo->curr.ppr_options == target_ppr_options)
1600 if (bootverbose == 0)
1601 break;
1602
1603 spi_period(starget) = tinfo->curr.period;
1604 spi_width(starget) = tinfo->curr.width;
1605 spi_offset(starget) = tinfo->curr.offset;
1606 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1607 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1608 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1609 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1610 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1611 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1612 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1613 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1614 spi_display_xfer_agreement(starget);
1615 break;
1616 }
1617 case AC_SENT_BDR:
1618 {
1619 WARN_ON(lun != CAM_LUN_WILDCARD);
1620 scsi_report_device_reset(ahd->platform_data->host,
1621 channel - 'A', target);
1622 break;
1623 }
1624 case AC_BUS_RESET:
1625 if (ahd->platform_data->host != NULL) {
1626 scsi_report_bus_reset(ahd->platform_data->host,
1627 channel - 'A');
1628 }
1629 break;
1630 default:
1631 panic("ahd_send_async: Unexpected async event");
1632 }
1633 }
1634
1635 /*
1636 * Calls the higher level scsi done function and frees the scb.
1637 */
1638 void
1639 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1640 {
1641 struct scsi_cmnd *cmd;
1642 struct ahd_linux_device *dev;
1643
1644 if ((scb->flags & SCB_ACTIVE) == 0) {
1645 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1646 ahd_dump_card_state(ahd);
1647 panic("Stopping for safety");
1648 }
1649 LIST_REMOVE(scb, pending_links);
1650 cmd = scb->io_ctx;
1651 dev = scb->platform_data->dev;
1652 dev->active--;
1653 dev->openings++;
1654 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1655 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1656 dev->qfrozen--;
1657 }
1658 ahd_linux_unmap_scb(ahd, scb);
1659
1660 /*
1661 * Guard against stale sense data.
1662 * The Linux mid-layer assumes that sense
1663 * was retrieved anytime the first byte of
1664 * the sense buffer looks "sane".
1665 */
1666 cmd->sense_buffer[0] = 0;
1667 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1668 uint32_t amount_xferred;
1669
1670 amount_xferred =
1671 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1672 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1673 #ifdef AHD_DEBUG
1674 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1675 ahd_print_path(ahd, scb);
1676 printf("Set CAM_UNCOR_PARITY\n");
1677 }
1678 #endif
1679 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1680 #ifdef AHD_REPORT_UNDERFLOWS
1681 /*
1682 * This code is disabled by default as some
1683 * clients of the SCSI system do not properly
1684 * initialize the underflow parameter. This
1685 * results in spurious termination of commands
1686 * that complete as expected (e.g. underflow is
1687 * allowed as command can return variable amounts
1688 * of data.
1689 */
1690 } else if (amount_xferred < scb->io_ctx->underflow) {
1691 u_int i;
1692
1693 ahd_print_path(ahd, scb);
1694 printf("CDB:");
1695 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1696 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1697 printf("\n");
1698 ahd_print_path(ahd, scb);
1699 printf("Saw underflow (%ld of %ld bytes). "
1700 "Treated as error\n",
1701 ahd_get_residual(scb),
1702 ahd_get_transfer_length(scb));
1703 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1704 #endif
1705 } else {
1706 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1707 }
1708 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1709 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1710 }
1711
1712 if (dev->openings == 1
1713 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1714 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1715 dev->tag_success_count++;
1716 /*
1717 * Some devices deal with temporary internal resource
1718 * shortages by returning queue full. When the queue
1719 * full occurrs, we throttle back. Slowly try to get
1720 * back to our previous queue depth.
1721 */
1722 if ((dev->openings + dev->active) < dev->maxtags
1723 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1724 dev->tag_success_count = 0;
1725 dev->openings++;
1726 }
1727
1728 if (dev->active == 0)
1729 dev->commands_since_idle_or_otag = 0;
1730
1731 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1732 printf("Recovery SCB completes\n");
1733 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1734 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1735 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1736
1737 if (ahd->platform_data->eh_done)
1738 complete(ahd->platform_data->eh_done);
1739 }
1740
1741 ahd_free_scb(ahd, scb);
1742 ahd_linux_queue_cmd_complete(ahd, cmd);
1743 }
1744
1745 static void
1746 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1747 struct scsi_device *sdev, struct scb *scb)
1748 {
1749 struct ahd_devinfo devinfo;
1750 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1751
1752 ahd_compile_devinfo(&devinfo,
1753 ahd->our_id,
1754 sdev->sdev_target->id, sdev->lun,
1755 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1756 ROLE_INITIATOR);
1757
1758 /*
1759 * We don't currently trust the mid-layer to
1760 * properly deal with queue full or busy. So,
1761 * when one occurs, we tell the mid-layer to
1762 * unconditionally requeue the command to us
1763 * so that we can retry it ourselves. We also
1764 * implement our own throttling mechanism so
1765 * we don't clobber the device with too many
1766 * commands.
1767 */
1768 switch (ahd_get_scsi_status(scb)) {
1769 default:
1770 break;
1771 case SCSI_STATUS_CHECK_COND:
1772 case SCSI_STATUS_CMD_TERMINATED:
1773 {
1774 struct scsi_cmnd *cmd;
1775
1776 /*
1777 * Copy sense information to the OS's cmd
1778 * structure if it is available.
1779 */
1780 cmd = scb->io_ctx;
1781 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1782 struct scsi_status_iu_header *siu;
1783 u_int sense_size;
1784 u_int sense_offset;
1785
1786 if (scb->flags & SCB_SENSE) {
1787 sense_size = min(sizeof(struct scsi_sense_data)
1788 - ahd_get_sense_residual(scb),
1789 (u_long)SCSI_SENSE_BUFFERSIZE);
1790 sense_offset = 0;
1791 } else {
1792 /*
1793 * Copy only the sense data into the provided
1794 * buffer.
1795 */
1796 siu = (struct scsi_status_iu_header *)
1797 scb->sense_data;
1798 sense_size = min_t(size_t,
1799 scsi_4btoul(siu->sense_length),
1800 SCSI_SENSE_BUFFERSIZE);
1801 sense_offset = SIU_SENSE_OFFSET(siu);
1802 }
1803
1804 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1805 memcpy(cmd->sense_buffer,
1806 ahd_get_sense_buf(ahd, scb)
1807 + sense_offset, sense_size);
1808 cmd->result |= (DRIVER_SENSE << 24);
1809
1810 #ifdef AHD_DEBUG
1811 if (ahd_debug & AHD_SHOW_SENSE) {
1812 int i;
1813
1814 printf("Copied %d bytes of sense data at %d:",
1815 sense_size, sense_offset);
1816 for (i = 0; i < sense_size; i++) {
1817 if ((i & 0xF) == 0)
1818 printf("\n");
1819 printf("0x%x ", cmd->sense_buffer[i]);
1820 }
1821 printf("\n");
1822 }
1823 #endif
1824 }
1825 break;
1826 }
1827 case SCSI_STATUS_QUEUE_FULL:
1828 /*
1829 * By the time the core driver has returned this
1830 * command, all other commands that were queued
1831 * to us but not the device have been returned.
1832 * This ensures that dev->active is equal to
1833 * the number of commands actually queued to
1834 * the device.
1835 */
1836 dev->tag_success_count = 0;
1837 if (dev->active != 0) {
1838 /*
1839 * Drop our opening count to the number
1840 * of commands currently outstanding.
1841 */
1842 dev->openings = 0;
1843 #ifdef AHD_DEBUG
1844 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1845 ahd_print_path(ahd, scb);
1846 printf("Dropping tag count to %d\n",
1847 dev->active);
1848 }
1849 #endif
1850 if (dev->active == dev->tags_on_last_queuefull) {
1851
1852 dev->last_queuefull_same_count++;
1853 /*
1854 * If we repeatedly see a queue full
1855 * at the same queue depth, this
1856 * device has a fixed number of tag
1857 * slots. Lock in this tag depth
1858 * so we stop seeing queue fulls from
1859 * this device.
1860 */
1861 if (dev->last_queuefull_same_count
1862 == AHD_LOCK_TAGS_COUNT) {
1863 dev->maxtags = dev->active;
1864 ahd_print_path(ahd, scb);
1865 printf("Locking max tag count at %d\n",
1866 dev->active);
1867 }
1868 } else {
1869 dev->tags_on_last_queuefull = dev->active;
1870 dev->last_queuefull_same_count = 0;
1871 }
1872 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1873 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1874 ahd_platform_set_tags(ahd, sdev, &devinfo,
1875 (dev->flags & AHD_DEV_Q_BASIC)
1876 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1877 break;
1878 }
1879 /*
1880 * Drop down to a single opening, and treat this
1881 * as if the target returned BUSY SCSI status.
1882 */
1883 dev->openings = 1;
1884 ahd_platform_set_tags(ahd, sdev, &devinfo,
1885 (dev->flags & AHD_DEV_Q_BASIC)
1886 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1887 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1888 }
1889 }
1890
1891 static void
1892 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1893 {
1894 int status;
1895 int new_status = DID_OK;
1896 int do_fallback = 0;
1897 int scsi_status;
1898
1899 /*
1900 * Map CAM error codes into Linux Error codes. We
1901 * avoid the conversion so that the DV code has the
1902 * full error information available when making
1903 * state change decisions.
1904 */
1905
1906 status = ahd_cmd_get_transaction_status(cmd);
1907 switch (status) {
1908 case CAM_REQ_INPROG:
1909 case CAM_REQ_CMP:
1910 new_status = DID_OK;
1911 break;
1912 case CAM_AUTOSENSE_FAIL:
1913 new_status = DID_ERROR;
1914 /* Fallthrough */
1915 case CAM_SCSI_STATUS_ERROR:
1916 scsi_status = ahd_cmd_get_scsi_status(cmd);
1917
1918 switch(scsi_status) {
1919 case SCSI_STATUS_CMD_TERMINATED:
1920 case SCSI_STATUS_CHECK_COND:
1921 if ((cmd->result >> 24) != DRIVER_SENSE) {
1922 do_fallback = 1;
1923 } else {
1924 struct scsi_sense_data *sense;
1925
1926 sense = (struct scsi_sense_data *)
1927 cmd->sense_buffer;
1928 if (sense->extra_len >= 5 &&
1929 (sense->add_sense_code == 0x47
1930 || sense->add_sense_code == 0x48))
1931 do_fallback = 1;
1932 }
1933 break;
1934 default:
1935 break;
1936 }
1937 break;
1938 case CAM_REQ_ABORTED:
1939 new_status = DID_ABORT;
1940 break;
1941 case CAM_BUSY:
1942 new_status = DID_BUS_BUSY;
1943 break;
1944 case CAM_REQ_INVALID:
1945 case CAM_PATH_INVALID:
1946 new_status = DID_BAD_TARGET;
1947 break;
1948 case CAM_SEL_TIMEOUT:
1949 new_status = DID_NO_CONNECT;
1950 break;
1951 case CAM_SCSI_BUS_RESET:
1952 case CAM_BDR_SENT:
1953 new_status = DID_RESET;
1954 break;
1955 case CAM_UNCOR_PARITY:
1956 new_status = DID_PARITY;
1957 do_fallback = 1;
1958 break;
1959 case CAM_CMD_TIMEOUT:
1960 new_status = DID_TIME_OUT;
1961 do_fallback = 1;
1962 break;
1963 case CAM_REQ_CMP_ERR:
1964 case CAM_UNEXP_BUSFREE:
1965 case CAM_DATA_RUN_ERR:
1966 new_status = DID_ERROR;
1967 do_fallback = 1;
1968 break;
1969 case CAM_UA_ABORT:
1970 case CAM_NO_HBA:
1971 case CAM_SEQUENCE_FAIL:
1972 case CAM_CCB_LEN_ERR:
1973 case CAM_PROVIDE_FAIL:
1974 case CAM_REQ_TERMIO:
1975 case CAM_UNREC_HBA_ERROR:
1976 case CAM_REQ_TOO_BIG:
1977 new_status = DID_ERROR;
1978 break;
1979 case CAM_REQUEUE_REQ:
1980 new_status = DID_REQUEUE;
1981 break;
1982 default:
1983 /* We should never get here */
1984 new_status = DID_ERROR;
1985 break;
1986 }
1987
1988 if (do_fallback) {
1989 printf("%s: device overrun (status %x) on %d:%d:%d\n",
1990 ahd_name(ahd), status, cmd->device->channel,
1991 cmd->device->id, cmd->device->lun);
1992 }
1993
1994 ahd_cmd_set_transaction_status(cmd, new_status);
1995
1996 cmd->scsi_done(cmd);
1997 }
1998
1999 static void
2000 ahd_freeze_simq(struct ahd_softc *ahd)
2001 {
2002 scsi_block_requests(ahd->platform_data->host);
2003 }
2004
2005 static void
2006 ahd_release_simq(struct ahd_softc *ahd)
2007 {
2008 scsi_unblock_requests(ahd->platform_data->host);
2009 }
2010
2011 static int
2012 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2013 {
2014 struct ahd_softc *ahd;
2015 struct ahd_linux_device *dev;
2016 struct scb *pending_scb;
2017 u_int saved_scbptr;
2018 u_int active_scbptr;
2019 u_int last_phase;
2020 u_int saved_scsiid;
2021 u_int cdb_byte;
2022 int retval;
2023 int was_paused;
2024 int paused;
2025 int wait;
2026 int disconnected;
2027 ahd_mode_state saved_modes;
2028 unsigned long flags;
2029
2030 pending_scb = NULL;
2031 paused = FALSE;
2032 wait = FALSE;
2033 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2034
2035 scmd_printk(KERN_INFO, cmd,
2036 "Attempting to queue an ABORT message:");
2037
2038 printf("CDB:");
2039 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2040 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2041 printf("\n");
2042
2043 ahd_lock(ahd, &flags);
2044
2045 /*
2046 * First determine if we currently own this command.
2047 * Start by searching the device queue. If not found
2048 * there, check the pending_scb list. If not found
2049 * at all, and the system wanted us to just abort the
2050 * command, return success.
2051 */
2052 dev = scsi_transport_device_data(cmd->device);
2053
2054 if (dev == NULL) {
2055 /*
2056 * No target device for this command exists,
2057 * so we must not still own the command.
2058 */
2059 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2060 retval = SUCCESS;
2061 goto no_cmd;
2062 }
2063
2064 /*
2065 * See if we can find a matching cmd in the pending list.
2066 */
2067 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2068 if (pending_scb->io_ctx == cmd)
2069 break;
2070 }
2071
2072 if (pending_scb == NULL) {
2073 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2074 goto no_cmd;
2075 }
2076
2077 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2078 /*
2079 * We can't queue two recovery actions using the same SCB
2080 */
2081 retval = FAILED;
2082 goto done;
2083 }
2084
2085 /*
2086 * Ensure that the card doesn't do anything
2087 * behind our back. Also make sure that we
2088 * didn't "just" miss an interrupt that would
2089 * affect this cmd.
2090 */
2091 was_paused = ahd_is_paused(ahd);
2092 ahd_pause_and_flushwork(ahd);
2093 paused = TRUE;
2094
2095 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2096 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2097 goto no_cmd;
2098 }
2099
2100 printf("%s: At time of recovery, card was %spaused\n",
2101 ahd_name(ahd), was_paused ? "" : "not ");
2102 ahd_dump_card_state(ahd);
2103
2104 disconnected = TRUE;
2105 if (ahd_search_qinfifo(ahd, cmd->device->id,
2106 cmd->device->channel + 'A',
2107 cmd->device->lun,
2108 pending_scb->hscb->tag,
2109 ROLE_INITIATOR, CAM_REQ_ABORTED,
2110 SEARCH_COMPLETE) > 0) {
2111 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2112 ahd_name(ahd), cmd->device->channel,
2113 cmd->device->id, cmd->device->lun);
2114 retval = SUCCESS;
2115 goto done;
2116 }
2117
2118 saved_modes = ahd_save_modes(ahd);
2119 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2120 last_phase = ahd_inb(ahd, LASTPHASE);
2121 saved_scbptr = ahd_get_scbptr(ahd);
2122 active_scbptr = saved_scbptr;
2123 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2124 struct scb *bus_scb;
2125
2126 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2127 if (bus_scb == pending_scb)
2128 disconnected = FALSE;
2129 }
2130
2131 /*
2132 * At this point, pending_scb is the scb associated with the
2133 * passed in command. That command is currently active on the
2134 * bus or is in the disconnected state.
2135 */
2136 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2137 if (last_phase != P_BUSFREE
2138 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2139
2140 /*
2141 * We're active on the bus, so assert ATN
2142 * and hope that the target responds.
2143 */
2144 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2145 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2146 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2147 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2148 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2149 wait = TRUE;
2150 } else if (disconnected) {
2151
2152 /*
2153 * Actually re-queue this SCB in an attempt
2154 * to select the device before it reconnects.
2155 */
2156 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2157 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2158 pending_scb->hscb->cdb_len = 0;
2159 pending_scb->hscb->task_attribute = 0;
2160 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2161
2162 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2163 /*
2164 * Mark the SCB has having an outstanding
2165 * task management function. Should the command
2166 * complete normally before the task management
2167 * function can be sent, the host will be notified
2168 * to abort our requeued SCB.
2169 */
2170 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2171 pending_scb->hscb->task_management);
2172 } else {
2173 /*
2174 * If non-packetized, set the MK_MESSAGE control
2175 * bit indicating that we desire to send a message.
2176 * We also set the disconnected flag since there is
2177 * no guarantee that our SCB control byte matches
2178 * the version on the card. We don't want the
2179 * sequencer to abort the command thinking an
2180 * unsolicited reselection occurred.
2181 */
2182 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2183
2184 /*
2185 * The sequencer will never re-reference the
2186 * in-core SCB. To make sure we are notified
2187 * during reslection, set the MK_MESSAGE flag in
2188 * the card's copy of the SCB.
2189 */
2190 ahd_outb(ahd, SCB_CONTROL,
2191 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2192 }
2193
2194 /*
2195 * Clear out any entries in the QINFIFO first
2196 * so we are the next SCB for this target
2197 * to run.
2198 */
2199 ahd_search_qinfifo(ahd, cmd->device->id,
2200 cmd->device->channel + 'A', cmd->device->lun,
2201 SCB_LIST_NULL, ROLE_INITIATOR,
2202 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2203 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2204 ahd_set_scbptr(ahd, saved_scbptr);
2205 ahd_print_path(ahd, pending_scb);
2206 printf("Device is disconnected, re-queuing SCB\n");
2207 wait = TRUE;
2208 } else {
2209 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2210 retval = FAILED;
2211 goto done;
2212 }
2213
2214 no_cmd:
2215 /*
2216 * Our assumption is that if we don't have the command, no
2217 * recovery action was required, so we return success. Again,
2218 * the semantics of the mid-layer recovery engine are not
2219 * well defined, so this may change in time.
2220 */
2221 retval = SUCCESS;
2222 done:
2223 if (paused)
2224 ahd_unpause(ahd);
2225 if (wait) {
2226 DECLARE_COMPLETION_ONSTACK(done);
2227
2228 ahd->platform_data->eh_done = &done;
2229 ahd_unlock(ahd, &flags);
2230
2231 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2232 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2233 ahd_lock(ahd, &flags);
2234 ahd->platform_data->eh_done = NULL;
2235 ahd_unlock(ahd, &flags);
2236 printf("%s: Timer Expired (active %d)\n",
2237 ahd_name(ahd), dev->active);
2238 retval = FAILED;
2239 }
2240 printf("Recovery code awake\n");
2241 } else
2242 ahd_unlock(ahd, &flags);
2243
2244 if (retval != SUCCESS)
2245 printf("%s: Command abort returning 0x%x\n",
2246 ahd_name(ahd), retval);
2247
2248 return retval;
2249 }
2250
2251 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2252 {
2253 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2254 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2255 struct ahd_devinfo devinfo;
2256 unsigned long flags;
2257
2258 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2259 starget->channel + 'A', ROLE_INITIATOR);
2260 ahd_lock(ahd, &flags);
2261 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2262 ahd_unlock(ahd, &flags);
2263 }
2264
2265 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2266 {
2267 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2268 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2269 struct ahd_tmode_tstate *tstate;
2270 struct ahd_initiator_tinfo *tinfo
2271 = ahd_fetch_transinfo(ahd,
2272 starget->channel + 'A',
2273 shost->this_id, starget->id, &tstate);
2274 struct ahd_devinfo devinfo;
2275 unsigned int ppr_options = tinfo->goal.ppr_options;
2276 unsigned int dt;
2277 unsigned long flags;
2278 unsigned long offset = tinfo->goal.offset;
2279
2280 #ifdef AHD_DEBUG
2281 if ((ahd_debug & AHD_SHOW_DV) != 0)
2282 printf("%s: set period to %d\n", ahd_name(ahd), period);
2283 #endif
2284 if (offset == 0)
2285 offset = MAX_OFFSET;
2286
2287 if (period < 8)
2288 period = 8;
2289 if (period < 10) {
2290 if (spi_max_width(starget)) {
2291 ppr_options |= MSG_EXT_PPR_DT_REQ;
2292 if (period == 8)
2293 ppr_options |= MSG_EXT_PPR_IU_REQ;
2294 } else
2295 period = 10;
2296 }
2297
2298 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2299
2300 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2301 starget->channel + 'A', ROLE_INITIATOR);
2302
2303 /* all PPR requests apart from QAS require wide transfers */
2304 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2305 if (spi_width(starget) == 0)
2306 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2307 }
2308
2309 ahd_find_syncrate(ahd, &period, &ppr_options,
2310 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2311
2312 ahd_lock(ahd, &flags);
2313 ahd_set_syncrate(ahd, &devinfo, period, offset,
2314 ppr_options, AHD_TRANS_GOAL, FALSE);
2315 ahd_unlock(ahd, &flags);
2316 }
2317
2318 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2319 {
2320 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2321 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2322 struct ahd_tmode_tstate *tstate;
2323 struct ahd_initiator_tinfo *tinfo
2324 = ahd_fetch_transinfo(ahd,
2325 starget->channel + 'A',
2326 shost->this_id, starget->id, &tstate);
2327 struct ahd_devinfo devinfo;
2328 unsigned int ppr_options = 0;
2329 unsigned int period = 0;
2330 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2331 unsigned long flags;
2332
2333 #ifdef AHD_DEBUG
2334 if ((ahd_debug & AHD_SHOW_DV) != 0)
2335 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2336 #endif
2337
2338 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2339 starget->channel + 'A', ROLE_INITIATOR);
2340 if (offset != 0) {
2341 period = tinfo->goal.period;
2342 ppr_options = tinfo->goal.ppr_options;
2343 ahd_find_syncrate(ahd, &period, &ppr_options,
2344 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2345 }
2346
2347 ahd_lock(ahd, &flags);
2348 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2349 AHD_TRANS_GOAL, FALSE);
2350 ahd_unlock(ahd, &flags);
2351 }
2352
2353 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2354 {
2355 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2356 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2357 struct ahd_tmode_tstate *tstate;
2358 struct ahd_initiator_tinfo *tinfo
2359 = ahd_fetch_transinfo(ahd,
2360 starget->channel + 'A',
2361 shost->this_id, starget->id, &tstate);
2362 struct ahd_devinfo devinfo;
2363 unsigned int ppr_options = tinfo->goal.ppr_options
2364 & ~MSG_EXT_PPR_DT_REQ;
2365 unsigned int period = tinfo->goal.period;
2366 unsigned int width = tinfo->goal.width;
2367 unsigned long flags;
2368
2369 #ifdef AHD_DEBUG
2370 if ((ahd_debug & AHD_SHOW_DV) != 0)
2371 printf("%s: %s DT\n", ahd_name(ahd),
2372 dt ? "enabling" : "disabling");
2373 #endif
2374 if (dt && spi_max_width(starget)) {
2375 ppr_options |= MSG_EXT_PPR_DT_REQ;
2376 if (!width)
2377 ahd_linux_set_width(starget, 1);
2378 } else {
2379 if (period <= 9)
2380 period = 10; /* If resetting DT, period must be >= 25ns */
2381 /* IU is invalid without DT set */
2382 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2383 }
2384 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2385 starget->channel + 'A', ROLE_INITIATOR);
2386 ahd_find_syncrate(ahd, &period, &ppr_options,
2387 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2388
2389 ahd_lock(ahd, &flags);
2390 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2391 ppr_options, AHD_TRANS_GOAL, FALSE);
2392 ahd_unlock(ahd, &flags);
2393 }
2394
2395 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2396 {
2397 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2398 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2399 struct ahd_tmode_tstate *tstate;
2400 struct ahd_initiator_tinfo *tinfo
2401 = ahd_fetch_transinfo(ahd,
2402 starget->channel + 'A',
2403 shost->this_id, starget->id, &tstate);
2404 struct ahd_devinfo devinfo;
2405 unsigned int ppr_options = tinfo->goal.ppr_options
2406 & ~MSG_EXT_PPR_QAS_REQ;
2407 unsigned int period = tinfo->goal.period;
2408 unsigned int dt;
2409 unsigned long flags;
2410
2411 #ifdef AHD_DEBUG
2412 if ((ahd_debug & AHD_SHOW_DV) != 0)
2413 printf("%s: %s QAS\n", ahd_name(ahd),
2414 qas ? "enabling" : "disabling");
2415 #endif
2416
2417 if (qas) {
2418 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2419 }
2420
2421 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2422
2423 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2424 starget->channel + 'A', ROLE_INITIATOR);
2425 ahd_find_syncrate(ahd, &period, &ppr_options,
2426 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2427
2428 ahd_lock(ahd, &flags);
2429 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2430 ppr_options, AHD_TRANS_GOAL, FALSE);
2431 ahd_unlock(ahd, &flags);
2432 }
2433
2434 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
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_IU_REQ;
2446 unsigned int period = tinfo->goal.period;
2447 unsigned int dt;
2448 unsigned long flags;
2449
2450 #ifdef AHD_DEBUG
2451 if ((ahd_debug & AHD_SHOW_DV) != 0)
2452 printf("%s: %s IU\n", ahd_name(ahd),
2453 iu ? "enabling" : "disabling");
2454 #endif
2455
2456 if (iu && spi_max_width(starget)) {
2457 ppr_options |= MSG_EXT_PPR_IU_REQ;
2458 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2459 }
2460
2461 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2462
2463 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2464 starget->channel + 'A', ROLE_INITIATOR);
2465 ahd_find_syncrate(ahd, &period, &ppr_options,
2466 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2467
2468 ahd_lock(ahd, &flags);
2469 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2470 ppr_options, AHD_TRANS_GOAL, FALSE);
2471 ahd_unlock(ahd, &flags);
2472 }
2473
2474 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2475 {
2476 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2477 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2478 struct ahd_tmode_tstate *tstate;
2479 struct ahd_initiator_tinfo *tinfo
2480 = ahd_fetch_transinfo(ahd,
2481 starget->channel + 'A',
2482 shost->this_id, starget->id, &tstate);
2483 struct ahd_devinfo devinfo;
2484 unsigned int ppr_options = tinfo->goal.ppr_options
2485 & ~MSG_EXT_PPR_RD_STRM;
2486 unsigned int period = tinfo->goal.period;
2487 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2488 unsigned long flags;
2489
2490 #ifdef AHD_DEBUG
2491 if ((ahd_debug & AHD_SHOW_DV) != 0)
2492 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2493 rdstrm ? "enabling" : "disabling");
2494 #endif
2495
2496 if (rdstrm && spi_max_width(starget))
2497 ppr_options |= MSG_EXT_PPR_RD_STRM;
2498
2499 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2500 starget->channel + 'A', ROLE_INITIATOR);
2501 ahd_find_syncrate(ahd, &period, &ppr_options,
2502 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2503
2504 ahd_lock(ahd, &flags);
2505 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2506 ppr_options, AHD_TRANS_GOAL, FALSE);
2507 ahd_unlock(ahd, &flags);
2508 }
2509
2510 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2511 {
2512 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2513 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2514 struct ahd_tmode_tstate *tstate;
2515 struct ahd_initiator_tinfo *tinfo
2516 = ahd_fetch_transinfo(ahd,
2517 starget->channel + 'A',
2518 shost->this_id, starget->id, &tstate);
2519 struct ahd_devinfo devinfo;
2520 unsigned int ppr_options = tinfo->goal.ppr_options
2521 & ~MSG_EXT_PPR_WR_FLOW;
2522 unsigned int period = tinfo->goal.period;
2523 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2524 unsigned long flags;
2525
2526 #ifdef AHD_DEBUG
2527 if ((ahd_debug & AHD_SHOW_DV) != 0)
2528 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2529 wrflow ? "enabling" : "disabling");
2530 #endif
2531
2532 if (wrflow && spi_max_width(starget))
2533 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2534
2535 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2536 starget->channel + 'A', ROLE_INITIATOR);
2537 ahd_find_syncrate(ahd, &period, &ppr_options,
2538 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2539
2540 ahd_lock(ahd, &flags);
2541 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2542 ppr_options, AHD_TRANS_GOAL, FALSE);
2543 ahd_unlock(ahd, &flags);
2544 }
2545
2546 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2547 {
2548 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2549 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2550 struct ahd_tmode_tstate *tstate;
2551 struct ahd_initiator_tinfo *tinfo
2552 = ahd_fetch_transinfo(ahd,
2553 starget->channel + 'A',
2554 shost->this_id, starget->id, &tstate);
2555 struct ahd_devinfo devinfo;
2556 unsigned int ppr_options = tinfo->goal.ppr_options
2557 & ~MSG_EXT_PPR_RTI;
2558 unsigned int period = tinfo->goal.period;
2559 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2560 unsigned long flags;
2561
2562 if ((ahd->features & AHD_RTI) == 0) {
2563 #ifdef AHD_DEBUG
2564 if ((ahd_debug & AHD_SHOW_DV) != 0)
2565 printf("%s: RTI not available\n", ahd_name(ahd));
2566 #endif
2567 return;
2568 }
2569
2570 #ifdef AHD_DEBUG
2571 if ((ahd_debug & AHD_SHOW_DV) != 0)
2572 printf("%s: %s RTI\n", ahd_name(ahd),
2573 rti ? "enabling" : "disabling");
2574 #endif
2575
2576 if (rti && spi_max_width(starget))
2577 ppr_options |= MSG_EXT_PPR_RTI;
2578
2579 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2580 starget->channel + 'A', ROLE_INITIATOR);
2581 ahd_find_syncrate(ahd, &period, &ppr_options,
2582 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2583
2584 ahd_lock(ahd, &flags);
2585 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2586 ppr_options, AHD_TRANS_GOAL, FALSE);
2587 ahd_unlock(ahd, &flags);
2588 }
2589
2590 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2591 {
2592 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2593 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2594 struct ahd_tmode_tstate *tstate;
2595 struct ahd_initiator_tinfo *tinfo
2596 = ahd_fetch_transinfo(ahd,
2597 starget->channel + 'A',
2598 shost->this_id, starget->id, &tstate);
2599 struct ahd_devinfo devinfo;
2600 unsigned int ppr_options = tinfo->goal.ppr_options
2601 & ~MSG_EXT_PPR_PCOMP_EN;
2602 unsigned int period = tinfo->goal.period;
2603 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2604 unsigned long flags;
2605
2606 #ifdef AHD_DEBUG
2607 if ((ahd_debug & AHD_SHOW_DV) != 0)
2608 printf("%s: %s Precompensation\n", ahd_name(ahd),
2609 pcomp ? "Enable" : "Disable");
2610 #endif
2611
2612 if (pcomp && spi_max_width(starget)) {
2613 uint8_t precomp;
2614
2615 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2616 struct ahd_linux_iocell_opts *iocell_opts;
2617
2618 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2619 precomp = iocell_opts->precomp;
2620 } else {
2621 precomp = AIC79XX_DEFAULT_PRECOMP;
2622 }
2623 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2624 AHD_SET_PRECOMP(ahd, precomp);
2625 } else {
2626 AHD_SET_PRECOMP(ahd, 0);
2627 }
2628
2629 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2630 starget->channel + 'A', ROLE_INITIATOR);
2631 ahd_find_syncrate(ahd, &period, &ppr_options,
2632 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2633
2634 ahd_lock(ahd, &flags);
2635 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2636 ppr_options, AHD_TRANS_GOAL, FALSE);
2637 ahd_unlock(ahd, &flags);
2638 }
2639
2640 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2641 {
2642 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2643 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2644 struct ahd_tmode_tstate *tstate;
2645 struct ahd_initiator_tinfo *tinfo
2646 = ahd_fetch_transinfo(ahd,
2647 starget->channel + 'A',
2648 shost->this_id, starget->id, &tstate);
2649 struct ahd_devinfo devinfo;
2650 unsigned int ppr_options = tinfo->goal.ppr_options
2651 & ~MSG_EXT_PPR_HOLD_MCS;
2652 unsigned int period = tinfo->goal.period;
2653 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2654 unsigned long flags;
2655
2656 if (hold && spi_max_width(starget))
2657 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2658
2659 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2660 starget->channel + 'A', ROLE_INITIATOR);
2661 ahd_find_syncrate(ahd, &period, &ppr_options,
2662 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2663
2664 ahd_lock(ahd, &flags);
2665 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2666 ppr_options, AHD_TRANS_GOAL, FALSE);
2667 ahd_unlock(ahd, &flags);
2668 }
2669
2670 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2671 {
2672 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2673 unsigned long flags;
2674 u8 mode;
2675
2676 ahd_lock(ahd, &flags);
2677 ahd_pause(ahd);
2678 mode = ahd_inb(ahd, SBLKCTL);
2679 ahd_unpause(ahd);
2680 ahd_unlock(ahd, &flags);
2681
2682 if (mode & ENAB40)
2683 spi_signalling(shost) = SPI_SIGNAL_LVD;
2684 else if (mode & ENAB20)
2685 spi_signalling(shost) = SPI_SIGNAL_SE;
2686 else
2687 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2688 }
2689
2690 static struct spi_function_template ahd_linux_transport_functions = {
2691 .set_offset = ahd_linux_set_offset,
2692 .show_offset = 1,
2693 .set_period = ahd_linux_set_period,
2694 .show_period = 1,
2695 .set_width = ahd_linux_set_width,
2696 .show_width = 1,
2697 .set_dt = ahd_linux_set_dt,
2698 .show_dt = 1,
2699 .set_iu = ahd_linux_set_iu,
2700 .show_iu = 1,
2701 .set_qas = ahd_linux_set_qas,
2702 .show_qas = 1,
2703 .set_rd_strm = ahd_linux_set_rd_strm,
2704 .show_rd_strm = 1,
2705 .set_wr_flow = ahd_linux_set_wr_flow,
2706 .show_wr_flow = 1,
2707 .set_rti = ahd_linux_set_rti,
2708 .show_rti = 1,
2709 .set_pcomp_en = ahd_linux_set_pcomp_en,
2710 .show_pcomp_en = 1,
2711 .set_hold_mcs = ahd_linux_set_hold_mcs,
2712 .show_hold_mcs = 1,
2713 .get_signalling = ahd_linux_get_signalling,
2714 };
2715
2716 static int __init
2717 ahd_linux_init(void)
2718 {
2719 int error = 0;
2720
2721 /*
2722 * If we've been passed any parameters, process them now.
2723 */
2724 if (aic79xx)
2725 aic79xx_setup(aic79xx);
2726
2727 ahd_linux_transport_template =
2728 spi_attach_transport(&ahd_linux_transport_functions);
2729 if (!ahd_linux_transport_template)
2730 return -ENODEV;
2731
2732 scsi_transport_reserve_device(ahd_linux_transport_template,
2733 sizeof(struct ahd_linux_device));
2734
2735 error = ahd_linux_pci_init();
2736 if (error)
2737 spi_release_transport(ahd_linux_transport_template);
2738 return error;
2739 }
2740
2741 static void __exit
2742 ahd_linux_exit(void)
2743 {
2744 ahd_linux_pci_exit();
2745 spi_release_transport(ahd_linux_transport_template);
2746 }
2747
2748 module_init(ahd_linux_init);
2749 module_exit(ahd_linux_exit);
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