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x86: cpa: move clflush_cache_range()
[wrt350n-kernel.git] / drivers / scsi / aic7xxx / aic79xx_osm.c
blob0e4708fd43c8e00d861b80392c976683d43145fa
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 Supress 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 .use_sg_chaining = ENABLE_SG_CHAINING,
770 .slave_alloc = ahd_linux_slave_alloc,
771 .slave_configure = ahd_linux_slave_configure,
772 .target_alloc = ahd_linux_target_alloc,
773 .target_destroy = ahd_linux_target_destroy,
774 };
775
776 /******************************** Bus DMA *************************************/
777 int
778 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent,
779 bus_size_t alignment, bus_size_t boundary,
780 dma_addr_t lowaddr, dma_addr_t highaddr,
781 bus_dma_filter_t *filter, void *filterarg,
782 bus_size_t maxsize, int nsegments,
783 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag)
784 {
785 bus_dma_tag_t dmat;
786
787 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT);
788 if (dmat == NULL)
789 return (ENOMEM);
790
791 /*
792 * Linux is very simplistic about DMA memory. For now don't
793 * maintain all specification information. Once Linux supplies
794 * better facilities for doing these operations, or the
795 * needs of this particular driver change, we might need to do
796 * more here.
797 */
798 dmat->alignment = alignment;
799 dmat->boundary = boundary;
800 dmat->maxsize = maxsize;
801 *ret_tag = dmat;
802 return (0);
803 }
804
805 void
806 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat)
807 {
808 free(dmat, M_DEVBUF);
809 }
810
811 int
812 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr,
813 int flags, bus_dmamap_t *mapp)
814 {
815 *vaddr = pci_alloc_consistent(ahd->dev_softc,
816 dmat->maxsize, mapp);
817 if (*vaddr == NULL)
818 return (ENOMEM);
819 return(0);
820 }
821
822 void
823 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat,
824 void* vaddr, bus_dmamap_t map)
825 {
826 pci_free_consistent(ahd->dev_softc, dmat->maxsize,
827 vaddr, map);
828 }
829
830 int
831 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map,
832 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb,
833 void *cb_arg, int flags)
834 {
835 /*
836 * Assume for now that this will only be used during
837 * initialization and not for per-transaction buffer mapping.
838 */
839 bus_dma_segment_t stack_sg;
840
841 stack_sg.ds_addr = map;
842 stack_sg.ds_len = dmat->maxsize;
843 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0);
844 return (0);
845 }
846
847 void
848 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
849 {
850 }
851
852 int
853 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map)
854 {
855 /* Nothing to do */
856 return (0);
857 }
858
859 /********************* Platform Dependent Functions ***************************/
860 static void
861 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value)
862 {
863
864 if ((instance >= 0)
865 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) {
866 uint8_t *iocell_info;
867
868 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance];
869 iocell_info[index] = value & 0xFFFF;
870 if (bootverbose)
871 printf("iocell[%d:%ld] = %d\n", instance, index, value);
872 }
873 }
874
875 static void
876 ahd_linux_setup_tag_info_global(char *p)
877 {
878 int tags, i, j;
879
880 tags = simple_strtoul(p + 1, NULL, 0) & 0xff;
881 printf("Setting Global Tags= %d\n", tags);
882
883 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) {
884 for (j = 0; j < AHD_NUM_TARGETS; j++) {
885 aic79xx_tag_info[i].tag_commands[j] = tags;
886 }
887 }
888 }
889
890 static void
891 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value)
892 {
893
894 if ((instance >= 0) && (targ >= 0)
895 && (instance < ARRAY_SIZE(aic79xx_tag_info))
896 && (targ < AHD_NUM_TARGETS)) {
897 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF;
898 if (bootverbose)
899 printf("tag_info[%d:%d] = %d\n", instance, targ, value);
900 }
901 }
902
903 static char *
904 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth,
905 void (*callback)(u_long, int, int, int32_t),
906 u_long callback_arg)
907 {
908 char *tok_end;
909 char *tok_end2;
910 int i;
911 int instance;
912 int targ;
913 int done;
914 char tok_list[] = {'.', ',', '{', '}', '\0'};
915
916 /* All options use a ':' name/arg separator */
917 if (*opt_arg != ':')
918 return (opt_arg);
919 opt_arg++;
920 instance = -1;
921 targ = -1;
922 done = FALSE;
923 /*
924 * Restore separator that may be in
925 * the middle of our option argument.
926 */
927 tok_end = strchr(opt_arg, '\0');
928 if (tok_end < end)
929 *tok_end = ',';
930 while (!done) {
931 switch (*opt_arg) {
932 case '{':
933 if (instance == -1) {
934 instance = 0;
935 } else {
936 if (depth > 1) {
937 if (targ == -1)
938 targ = 0;
939 } else {
940 printf("Malformed Option %s\n",
941 opt_name);
942 done = TRUE;
943 }
944 }
945 opt_arg++;
946 break;
947 case '}':
948 if (targ != -1)
949 targ = -1;
950 else if (instance != -1)
951 instance = -1;
952 opt_arg++;
953 break;
954 case ',':
955 case '.':
956 if (instance == -1)
957 done = TRUE;
958 else if (targ >= 0)
959 targ++;
960 else if (instance >= 0)
961 instance++;
962 opt_arg++;
963 break;
964 case '\0':
965 done = TRUE;
966 break;
967 default:
968 tok_end = end;
969 for (i = 0; tok_list[i]; i++) {
970 tok_end2 = strchr(opt_arg, tok_list[i]);
971 if ((tok_end2) && (tok_end2 < tok_end))
972 tok_end = tok_end2;
973 }
974 callback(callback_arg, instance, targ,
975 simple_strtol(opt_arg, NULL, 0));
976 opt_arg = tok_end;
977 break;
978 }
979 }
980 return (opt_arg);
981 }
982
983 /*
984 * Handle Linux boot parameters. This routine allows for assigning a value
985 * to a parameter with a ':' between the parameter and the value.
986 * ie. aic79xx=stpwlev:1,extended
987 */
988 static int
989 aic79xx_setup(char *s)
990 {
991 int i, n;
992 char *p;
993 char *end;
994
995 static struct {
996 const char *name;
997 uint32_t *flag;
998 } options[] = {
999 { "extended", &aic79xx_extended },
1000 { "no_reset", &aic79xx_no_reset },
1001 { "verbose", &aic79xx_verbose },
1002 { "allow_memio", &aic79xx_allow_memio},
1003 #ifdef AHD_DEBUG
1004 { "debug", &ahd_debug },
1005 #endif
1006 { "periodic_otag", &aic79xx_periodic_otag },
1007 { "pci_parity", &aic79xx_pci_parity },
1008 { "seltime", &aic79xx_seltime },
1009 { "tag_info", NULL },
1010 { "global_tag_depth", NULL},
1011 { "slewrate", NULL },
1012 { "precomp", NULL },
1013 { "amplitude", NULL },
1014 { "slowcrc", &aic79xx_slowcrc },
1015 };
1016
1017 end = strchr(s, '\0');
1018
1019 /*
1020 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE
1021 * will never be 0 in this case.
1022 */
1023 n = 0;
1024
1025 while ((p = strsep(&s, ",.")) != NULL) {
1026 if (*p == '\0')
1027 continue;
1028 for (i = 0; i < ARRAY_SIZE(options); i++) {
1029
1030 n = strlen(options[i].name);
1031 if (strncmp(options[i].name, p, n) == 0)
1032 break;
1033 }
1034 if (i == ARRAY_SIZE(options))
1035 continue;
1036
1037 if (strncmp(p, "global_tag_depth", n) == 0) {
1038 ahd_linux_setup_tag_info_global(p + n);
1039 } else if (strncmp(p, "tag_info", n) == 0) {
1040 s = ahd_parse_brace_option("tag_info", p + n, end,
1041 2, ahd_linux_setup_tag_info, 0);
1042 } else if (strncmp(p, "slewrate", n) == 0) {
1043 s = ahd_parse_brace_option("slewrate",
1044 p + n, end, 1, ahd_linux_setup_iocell_info,
1045 AIC79XX_SLEWRATE_INDEX);
1046 } else if (strncmp(p, "precomp", n) == 0) {
1047 s = ahd_parse_brace_option("precomp",
1048 p + n, end, 1, ahd_linux_setup_iocell_info,
1049 AIC79XX_PRECOMP_INDEX);
1050 } else if (strncmp(p, "amplitude", n) == 0) {
1051 s = ahd_parse_brace_option("amplitude",
1052 p + n, end, 1, ahd_linux_setup_iocell_info,
1053 AIC79XX_AMPLITUDE_INDEX);
1054 } else if (p[n] == ':') {
1055 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0);
1056 } else if (!strncmp(p, "verbose", n)) {
1057 *(options[i].flag) = 1;
1058 } else {
1059 *(options[i].flag) ^= 0xFFFFFFFF;
1060 }
1061 }
1062 return 1;
1063 }
1064
1065 __setup("aic79xx=", aic79xx_setup);
1066
1067 uint32_t aic79xx_verbose;
1068
1069 int
1070 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template)
1071 {
1072 char buf[80];
1073 struct Scsi_Host *host;
1074 char *new_name;
1075 u_long s;
1076 int retval;
1077
1078 template->name = ahd->description;
1079 host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
1080 if (host == NULL)
1081 return (ENOMEM);
1082
1083 *((struct ahd_softc **)host->hostdata) = ahd;
1084 ahd->platform_data->host = host;
1085 host->can_queue = AHD_MAX_QUEUE;
1086 host->cmd_per_lun = 2;
1087 host->sg_tablesize = AHD_NSEG;
1088 host->this_id = ahd->our_id;
1089 host->irq = ahd->platform_data->irq;
1090 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8;
1091 host->max_lun = AHD_NUM_LUNS;
1092 host->max_channel = 0;
1093 host->sg_tablesize = AHD_NSEG;
1094 ahd_lock(ahd, &s);
1095 ahd_set_unit(ahd, ahd_linux_unit++);
1096 ahd_unlock(ahd, &s);
1097 sprintf(buf, "scsi%d", host->host_no);
1098 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
1099 if (new_name != NULL) {
1100 strcpy(new_name, buf);
1101 ahd_set_name(ahd, new_name);
1102 }
1103 host->unique_id = ahd->unit;
1104 ahd_linux_initialize_scsi_bus(ahd);
1105 ahd_intr_enable(ahd, TRUE);
1106
1107 host->transportt = ahd_linux_transport_template;
1108
1109 retval = scsi_add_host(host, &ahd->dev_softc->dev);
1110 if (retval) {
1111 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
1112 scsi_host_put(host);
1113 return retval;
1114 }
1115
1116 scsi_scan_host(host);
1117 return 0;
1118 }
1119
1120 /*
1121 * Place the SCSI bus into a known state by either resetting it,
1122 * or forcing transfer negotiations on the next command to any
1123 * target.
1124 */
1125 static void
1126 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd)
1127 {
1128 u_int target_id;
1129 u_int numtarg;
1130 unsigned long s;
1131
1132 target_id = 0;
1133 numtarg = 0;
1134
1135 if (aic79xx_no_reset != 0)
1136 ahd->flags &= ~AHD_RESET_BUS_A;
1137
1138 if ((ahd->flags & AHD_RESET_BUS_A) != 0)
1139 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE);
1140 else
1141 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8;
1142
1143 ahd_lock(ahd, &s);
1144
1145 /*
1146 * Force negotiation to async for all targets that
1147 * will not see an initial bus reset.
1148 */
1149 for (; target_id < numtarg; target_id++) {
1150 struct ahd_devinfo devinfo;
1151 struct ahd_initiator_tinfo *tinfo;
1152 struct ahd_tmode_tstate *tstate;
1153
1154 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1155 target_id, &tstate);
1156 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id,
1157 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR);
1158 ahd_update_neg_request(ahd, &devinfo, tstate,
1159 tinfo, AHD_NEG_ALWAYS);
1160 }
1161 ahd_unlock(ahd, &s);
1162 /* Give the bus some time to recover */
1163 if ((ahd->flags & AHD_RESET_BUS_A) != 0) {
1164 ahd_freeze_simq(ahd);
1165 msleep(AIC79XX_RESET_DELAY);
1166 ahd_release_simq(ahd);
1167 }
1168 }
1169
1170 int
1171 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg)
1172 {
1173 ahd->platform_data =
1174 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT);
1175 if (ahd->platform_data == NULL)
1176 return (ENOMEM);
1177 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data));
1178 ahd->platform_data->irq = AHD_LINUX_NOIRQ;
1179 ahd_lockinit(ahd);
1180 ahd->seltime = (aic79xx_seltime & 0x3) << 4;
1181 return (0);
1182 }
1183
1184 void
1185 ahd_platform_free(struct ahd_softc *ahd)
1186 {
1187 struct scsi_target *starget;
1188 int i;
1189
1190 if (ahd->platform_data != NULL) {
1191 /* destroy all of the device and target objects */
1192 for (i = 0; i < AHD_NUM_TARGETS; i++) {
1193 starget = ahd->platform_data->starget[i];
1194 if (starget != NULL) {
1195 ahd->platform_data->starget[i] = NULL;
1196 }
1197 }
1198
1199 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ)
1200 free_irq(ahd->platform_data->irq, ahd);
1201 if (ahd->tags[0] == BUS_SPACE_PIO
1202 && ahd->bshs[0].ioport != 0)
1203 release_region(ahd->bshs[0].ioport, 256);
1204 if (ahd->tags[1] == BUS_SPACE_PIO
1205 && ahd->bshs[1].ioport != 0)
1206 release_region(ahd->bshs[1].ioport, 256);
1207 if (ahd->tags[0] == BUS_SPACE_MEMIO
1208 && ahd->bshs[0].maddr != NULL) {
1209 iounmap(ahd->bshs[0].maddr);
1210 release_mem_region(ahd->platform_data->mem_busaddr,
1211 0x1000);
1212 }
1213 if (ahd->platform_data->host)
1214 scsi_host_put(ahd->platform_data->host);
1215
1216 free(ahd->platform_data, M_DEVBUF);
1217 }
1218 }
1219
1220 void
1221 ahd_platform_init(struct ahd_softc *ahd)
1222 {
1223 /*
1224 * Lookup and commit any modified IO Cell options.
1225 */
1226 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
1227 struct ahd_linux_iocell_opts *iocell_opts;
1228
1229 iocell_opts = &aic79xx_iocell_info[ahd->unit];
1230 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP)
1231 AHD_SET_PRECOMP(ahd, iocell_opts->precomp);
1232 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE)
1233 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate);
1234 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE)
1235 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude);
1236 }
1237
1238 }
1239
1240 void
1241 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb)
1242 {
1243 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb),
1244 SCB_GET_CHANNEL(ahd, scb),
1245 SCB_GET_LUN(scb), SCB_LIST_NULL,
1246 ROLE_UNKNOWN, CAM_REQUEUE_REQ);
1247 }
1248
1249 void
1250 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev,
1251 struct ahd_devinfo *devinfo, ahd_queue_alg alg)
1252 {
1253 struct ahd_linux_device *dev;
1254 int was_queuing;
1255 int now_queuing;
1256
1257 if (sdev == NULL)
1258 return;
1259
1260 dev = scsi_transport_device_data(sdev);
1261
1262 if (dev == NULL)
1263 return;
1264 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED);
1265 switch (alg) {
1266 default:
1267 case AHD_QUEUE_NONE:
1268 now_queuing = 0;
1269 break;
1270 case AHD_QUEUE_BASIC:
1271 now_queuing = AHD_DEV_Q_BASIC;
1272 break;
1273 case AHD_QUEUE_TAGGED:
1274 now_queuing = AHD_DEV_Q_TAGGED;
1275 break;
1276 }
1277 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0
1278 && (was_queuing != now_queuing)
1279 && (dev->active != 0)) {
1280 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY;
1281 dev->qfrozen++;
1282 }
1283
1284 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG);
1285 if (now_queuing) {
1286 u_int usertags;
1287
1288 usertags = ahd_linux_user_tagdepth(ahd, devinfo);
1289 if (!was_queuing) {
1290 /*
1291 * Start out agressively and allow our
1292 * dynamic queue depth algorithm to take
1293 * care of the rest.
1294 */
1295 dev->maxtags = usertags;
1296 dev->openings = dev->maxtags - dev->active;
1297 }
1298 if (dev->maxtags == 0) {
1299 /*
1300 * Queueing is disabled by the user.
1301 */
1302 dev->openings = 1;
1303 } else if (alg == AHD_QUEUE_TAGGED) {
1304 dev->flags |= AHD_DEV_Q_TAGGED;
1305 if (aic79xx_periodic_otag != 0)
1306 dev->flags |= AHD_DEV_PERIODIC_OTAG;
1307 } else
1308 dev->flags |= AHD_DEV_Q_BASIC;
1309 } else {
1310 /* We can only have one opening. */
1311 dev->maxtags = 0;
1312 dev->openings = 1 - dev->active;
1313 }
1314
1315 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) {
1316 case AHD_DEV_Q_BASIC:
1317 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK);
1318 scsi_activate_tcq(sdev, dev->openings + dev->active);
1319 break;
1320 case AHD_DEV_Q_TAGGED:
1321 scsi_set_tag_type(sdev, MSG_ORDERED_TASK);
1322 scsi_activate_tcq(sdev, dev->openings + dev->active);
1323 break;
1324 default:
1325 /*
1326 * We allow the OS to queue 2 untagged transactions to
1327 * us at any time even though we can only execute them
1328 * serially on the controller/device. This should
1329 * remove some latency.
1330 */
1331 scsi_deactivate_tcq(sdev, 1);
1332 break;
1333 }
1334 }
1335
1336 int
1337 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel,
1338 int lun, u_int tag, role_t role, uint32_t status)
1339 {
1340 return 0;
1341 }
1342
1343 static u_int
1344 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
1345 {
1346 static int warned_user;
1347 u_int tags;
1348
1349 tags = 0;
1350 if ((ahd->user_discenable & devinfo->target_mask) != 0) {
1351 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) {
1352
1353 if (warned_user == 0) {
1354 printf(KERN_WARNING
1355 "aic79xx: WARNING: Insufficient tag_info instances\n"
1356 "aic79xx: for installed controllers. Using defaults\n"
1357 "aic79xx: Please update the aic79xx_tag_info array in\n"
1358 "aic79xx: the aic79xx_osm.c source file.\n");
1359 warned_user++;
1360 }
1361 tags = AHD_MAX_QUEUE;
1362 } else {
1363 adapter_tag_info_t *tag_info;
1364
1365 tag_info = &aic79xx_tag_info[ahd->unit];
1366 tags = tag_info->tag_commands[devinfo->target_offset];
1367 if (tags > AHD_MAX_QUEUE)
1368 tags = AHD_MAX_QUEUE;
1369 }
1370 }
1371 return (tags);
1372 }
1373
1374 /*
1375 * Determines the queue depth for a given device.
1376 */
1377 static void
1378 ahd_linux_device_queue_depth(struct scsi_device *sdev)
1379 {
1380 struct ahd_devinfo devinfo;
1381 u_int tags;
1382 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata);
1383
1384 ahd_compile_devinfo(&devinfo,
1385 ahd->our_id,
1386 sdev->sdev_target->id, sdev->lun,
1387 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1388 ROLE_INITIATOR);
1389 tags = ahd_linux_user_tagdepth(ahd, &devinfo);
1390 if (tags != 0 && sdev->tagged_supported != 0) {
1391
1392 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED);
1393 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1394 devinfo.lun, AC_TRANSFER_NEG);
1395 ahd_print_devinfo(ahd, &devinfo);
1396 printf("Tagged Queuing enabled. Depth %d\n", tags);
1397 } else {
1398 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE);
1399 ahd_send_async(ahd, devinfo.channel, devinfo.target,
1400 devinfo.lun, AC_TRANSFER_NEG);
1401 }
1402 }
1403
1404 static int
1405 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev,
1406 struct scsi_cmnd *cmd)
1407 {
1408 struct scb *scb;
1409 struct hardware_scb *hscb;
1410 struct ahd_initiator_tinfo *tinfo;
1411 struct ahd_tmode_tstate *tstate;
1412 u_int col_idx;
1413 uint16_t mask;
1414 unsigned long flags;
1415 int nseg;
1416
1417 ahd_lock(ahd, &flags);
1418
1419 /*
1420 * Get an scb to use.
1421 */
1422 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id,
1423 cmd->device->id, &tstate);
1424 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0
1425 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) {
1426 col_idx = AHD_NEVER_COL_IDX;
1427 } else {
1428 col_idx = AHD_BUILD_COL_IDX(cmd->device->id,
1429 cmd->device->lun);
1430 }
1431 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) {
1432 ahd->flags |= AHD_RESOURCE_SHORTAGE;
1433 ahd_unlock(ahd, &flags);
1434 return SCSI_MLQUEUE_HOST_BUSY;
1435 }
1436
1437 scb->io_ctx = cmd;
1438 scb->platform_data->dev = dev;
1439 hscb = scb->hscb;
1440 cmd->host_scribble = (char *)scb;
1441
1442 /*
1443 * Fill out basics of the HSCB.
1444 */
1445 hscb->control = 0;
1446 hscb->scsiid = BUILD_SCSIID(ahd, cmd);
1447 hscb->lun = cmd->device->lun;
1448 scb->hscb->task_management = 0;
1449 mask = SCB_GET_TARGET_MASK(ahd, scb);
1450
1451 if ((ahd->user_discenable & mask) != 0)
1452 hscb->control |= DISCENB;
1453
1454 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0)
1455 scb->flags |= SCB_PACKETIZED;
1456
1457 if ((tstate->auto_negotiate & mask) != 0) {
1458 scb->flags |= SCB_AUTO_NEGOTIATE;
1459 scb->hscb->control |= MK_MESSAGE;
1460 }
1461
1462 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) {
1463 int msg_bytes;
1464 uint8_t tag_msgs[2];
1465
1466 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs);
1467 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) {
1468 hscb->control |= tag_msgs[0];
1469 if (tag_msgs[0] == MSG_ORDERED_TASK)
1470 dev->commands_since_idle_or_otag = 0;
1471 } else
1472 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH
1473 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) {
1474 hscb->control |= MSG_ORDERED_TASK;
1475 dev->commands_since_idle_or_otag = 0;
1476 } else {
1477 hscb->control |= MSG_SIMPLE_TASK;
1478 }
1479 }
1480
1481 hscb->cdb_len = cmd->cmd_len;
1482 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len);
1483
1484 scb->platform_data->xfer_len = 0;
1485 ahd_set_residual(scb, 0);
1486 ahd_set_sense_residual(scb, 0);
1487 scb->sg_count = 0;
1488
1489 nseg = scsi_dma_map(cmd);
1490 BUG_ON(nseg < 0);
1491 if (nseg > 0) {
1492 void *sg = scb->sg_list;
1493 struct scatterlist *cur_seg;
1494 int i;
1495
1496 scb->platform_data->xfer_len = 0;
1497
1498 scsi_for_each_sg(cmd, cur_seg, nseg, i) {
1499 dma_addr_t addr;
1500 bus_size_t len;
1501
1502 addr = sg_dma_address(cur_seg);
1503 len = sg_dma_len(cur_seg);
1504 scb->platform_data->xfer_len += len;
1505 sg = ahd_sg_setup(ahd, scb, sg, addr, len,
1506 i == (nseg - 1));
1507 }
1508 }
1509
1510 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links);
1511 dev->openings--;
1512 dev->active++;
1513 dev->commands_issued++;
1514
1515 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0)
1516 dev->commands_since_idle_or_otag++;
1517 scb->flags |= SCB_ACTIVE;
1518 ahd_queue_scb(ahd, scb);
1519
1520 ahd_unlock(ahd, &flags);
1521
1522 return 0;
1523 }
1524
1525 /*
1526 * SCSI controller interrupt handler.
1527 */
1528 irqreturn_t
1529 ahd_linux_isr(int irq, void *dev_id)
1530 {
1531 struct ahd_softc *ahd;
1532 u_long flags;
1533 int ours;
1534
1535 ahd = (struct ahd_softc *) dev_id;
1536 ahd_lock(ahd, &flags);
1537 ours = ahd_intr(ahd);
1538 ahd_unlock(ahd, &flags);
1539 return IRQ_RETVAL(ours);
1540 }
1541
1542 void
1543 ahd_send_async(struct ahd_softc *ahd, char channel,
1544 u_int target, u_int lun, ac_code code)
1545 {
1546 switch (code) {
1547 case AC_TRANSFER_NEG:
1548 {
1549 char buf[80];
1550 struct scsi_target *starget;
1551 struct info_str info;
1552 struct ahd_initiator_tinfo *tinfo;
1553 struct ahd_tmode_tstate *tstate;
1554 unsigned int target_ppr_options;
1555
1556 BUG_ON(target == CAM_TARGET_WILDCARD);
1557
1558 info.buffer = buf;
1559 info.length = sizeof(buf);
1560 info.offset = 0;
1561 info.pos = 0;
1562 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id,
1563 target, &tstate);
1564
1565 /*
1566 * Don't bother reporting results while
1567 * negotiations are still pending.
1568 */
1569 if (tinfo->curr.period != tinfo->goal.period
1570 || tinfo->curr.width != tinfo->goal.width
1571 || tinfo->curr.offset != tinfo->goal.offset
1572 || tinfo->curr.ppr_options != tinfo->goal.ppr_options)
1573 if (bootverbose == 0)
1574 break;
1575
1576 /*
1577 * Don't bother reporting results that
1578 * are identical to those last reported.
1579 */
1580 starget = ahd->platform_data->starget[target];
1581 if (starget == NULL)
1582 break;
1583
1584 target_ppr_options =
1585 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0)
1586 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0)
1587 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0)
1588 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0)
1589 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0)
1590 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0)
1591 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0)
1592 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0);
1593
1594 if (tinfo->curr.period == spi_period(starget)
1595 && tinfo->curr.width == spi_width(starget)
1596 && tinfo->curr.offset == spi_offset(starget)
1597 && tinfo->curr.ppr_options == target_ppr_options)
1598 if (bootverbose == 0)
1599 break;
1600
1601 spi_period(starget) = tinfo->curr.period;
1602 spi_width(starget) = tinfo->curr.width;
1603 spi_offset(starget) = tinfo->curr.offset;
1604 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0;
1605 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0;
1606 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0;
1607 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0;
1608 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0;
1609 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0;
1610 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0;
1611 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0;
1612 spi_display_xfer_agreement(starget);
1613 break;
1614 }
1615 case AC_SENT_BDR:
1616 {
1617 WARN_ON(lun != CAM_LUN_WILDCARD);
1618 scsi_report_device_reset(ahd->platform_data->host,
1619 channel - 'A', target);
1620 break;
1621 }
1622 case AC_BUS_RESET:
1623 if (ahd->platform_data->host != NULL) {
1624 scsi_report_bus_reset(ahd->platform_data->host,
1625 channel - 'A');
1626 }
1627 break;
1628 default:
1629 panic("ahd_send_async: Unexpected async event");
1630 }
1631 }
1632
1633 /*
1634 * Calls the higher level scsi done function and frees the scb.
1635 */
1636 void
1637 ahd_done(struct ahd_softc *ahd, struct scb *scb)
1638 {
1639 struct scsi_cmnd *cmd;
1640 struct ahd_linux_device *dev;
1641
1642 if ((scb->flags & SCB_ACTIVE) == 0) {
1643 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb));
1644 ahd_dump_card_state(ahd);
1645 panic("Stopping for safety");
1646 }
1647 LIST_REMOVE(scb, pending_links);
1648 cmd = scb->io_ctx;
1649 dev = scb->platform_data->dev;
1650 dev->active--;
1651 dev->openings++;
1652 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) {
1653 cmd->result &= ~(CAM_DEV_QFRZN << 16);
1654 dev->qfrozen--;
1655 }
1656 ahd_linux_unmap_scb(ahd, scb);
1657
1658 /*
1659 * Guard against stale sense data.
1660 * The Linux mid-layer assumes that sense
1661 * was retrieved anytime the first byte of
1662 * the sense buffer looks "sane".
1663 */
1664 cmd->sense_buffer[0] = 0;
1665 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) {
1666 uint32_t amount_xferred;
1667
1668 amount_xferred =
1669 ahd_get_transfer_length(scb) - ahd_get_residual(scb);
1670 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) {
1671 #ifdef AHD_DEBUG
1672 if ((ahd_debug & AHD_SHOW_MISC) != 0) {
1673 ahd_print_path(ahd, scb);
1674 printf("Set CAM_UNCOR_PARITY\n");
1675 }
1676 #endif
1677 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY);
1678 #ifdef AHD_REPORT_UNDERFLOWS
1679 /*
1680 * This code is disabled by default as some
1681 * clients of the SCSI system do not properly
1682 * initialize the underflow parameter. This
1683 * results in spurious termination of commands
1684 * that complete as expected (e.g. underflow is
1685 * allowed as command can return variable amounts
1686 * of data.
1687 */
1688 } else if (amount_xferred < scb->io_ctx->underflow) {
1689 u_int i;
1690
1691 ahd_print_path(ahd, scb);
1692 printf("CDB:");
1693 for (i = 0; i < scb->io_ctx->cmd_len; i++)
1694 printf(" 0x%x", scb->io_ctx->cmnd[i]);
1695 printf("\n");
1696 ahd_print_path(ahd, scb);
1697 printf("Saw underflow (%ld of %ld bytes). "
1698 "Treated as error\n",
1699 ahd_get_residual(scb),
1700 ahd_get_transfer_length(scb));
1701 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR);
1702 #endif
1703 } else {
1704 ahd_set_transaction_status(scb, CAM_REQ_CMP);
1705 }
1706 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) {
1707 ahd_linux_handle_scsi_status(ahd, cmd->device, scb);
1708 }
1709
1710 if (dev->openings == 1
1711 && ahd_get_transaction_status(scb) == CAM_REQ_CMP
1712 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL)
1713 dev->tag_success_count++;
1714 /*
1715 * Some devices deal with temporary internal resource
1716 * shortages by returning queue full. When the queue
1717 * full occurrs, we throttle back. Slowly try to get
1718 * back to our previous queue depth.
1719 */
1720 if ((dev->openings + dev->active) < dev->maxtags
1721 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) {
1722 dev->tag_success_count = 0;
1723 dev->openings++;
1724 }
1725
1726 if (dev->active == 0)
1727 dev->commands_since_idle_or_otag = 0;
1728
1729 if ((scb->flags & SCB_RECOVERY_SCB) != 0) {
1730 printf("Recovery SCB completes\n");
1731 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT
1732 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED)
1733 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT);
1734
1735 if (ahd->platform_data->eh_done)
1736 complete(ahd->platform_data->eh_done);
1737 }
1738
1739 ahd_free_scb(ahd, scb);
1740 ahd_linux_queue_cmd_complete(ahd, cmd);
1741 }
1742
1743 static void
1744 ahd_linux_handle_scsi_status(struct ahd_softc *ahd,
1745 struct scsi_device *sdev, struct scb *scb)
1746 {
1747 struct ahd_devinfo devinfo;
1748 struct ahd_linux_device *dev = scsi_transport_device_data(sdev);
1749
1750 ahd_compile_devinfo(&devinfo,
1751 ahd->our_id,
1752 sdev->sdev_target->id, sdev->lun,
1753 sdev->sdev_target->channel == 0 ? 'A' : 'B',
1754 ROLE_INITIATOR);
1755
1756 /*
1757 * We don't currently trust the mid-layer to
1758 * properly deal with queue full or busy. So,
1759 * when one occurs, we tell the mid-layer to
1760 * unconditionally requeue the command to us
1761 * so that we can retry it ourselves. We also
1762 * implement our own throttling mechanism so
1763 * we don't clobber the device with too many
1764 * commands.
1765 */
1766 switch (ahd_get_scsi_status(scb)) {
1767 default:
1768 break;
1769 case SCSI_STATUS_CHECK_COND:
1770 case SCSI_STATUS_CMD_TERMINATED:
1771 {
1772 struct scsi_cmnd *cmd;
1773
1774 /*
1775 * Copy sense information to the OS's cmd
1776 * structure if it is available.
1777 */
1778 cmd = scb->io_ctx;
1779 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) {
1780 struct scsi_status_iu_header *siu;
1781 u_int sense_size;
1782 u_int sense_offset;
1783
1784 if (scb->flags & SCB_SENSE) {
1785 sense_size = min(sizeof(struct scsi_sense_data)
1786 - ahd_get_sense_residual(scb),
1787 (u_long)SCSI_SENSE_BUFFERSIZE);
1788 sense_offset = 0;
1789 } else {
1790 /*
1791 * Copy only the sense data into the provided
1792 * buffer.
1793 */
1794 siu = (struct scsi_status_iu_header *)
1795 scb->sense_data;
1796 sense_size = min_t(size_t,
1797 scsi_4btoul(siu->sense_length),
1798 SCSI_SENSE_BUFFERSIZE);
1799 sense_offset = SIU_SENSE_OFFSET(siu);
1800 }
1801
1802 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1803 memcpy(cmd->sense_buffer,
1804 ahd_get_sense_buf(ahd, scb)
1805 + sense_offset, sense_size);
1806 cmd->result |= (DRIVER_SENSE << 24);
1807
1808 #ifdef AHD_DEBUG
1809 if (ahd_debug & AHD_SHOW_SENSE) {
1810 int i;
1811
1812 printf("Copied %d bytes of sense data at %d:",
1813 sense_size, sense_offset);
1814 for (i = 0; i < sense_size; i++) {
1815 if ((i & 0xF) == 0)
1816 printf("\n");
1817 printf("0x%x ", cmd->sense_buffer[i]);
1818 }
1819 printf("\n");
1820 }
1821 #endif
1822 }
1823 break;
1824 }
1825 case SCSI_STATUS_QUEUE_FULL:
1826 /*
1827 * By the time the core driver has returned this
1828 * command, all other commands that were queued
1829 * to us but not the device have been returned.
1830 * This ensures that dev->active is equal to
1831 * the number of commands actually queued to
1832 * the device.
1833 */
1834 dev->tag_success_count = 0;
1835 if (dev->active != 0) {
1836 /*
1837 * Drop our opening count to the number
1838 * of commands currently outstanding.
1839 */
1840 dev->openings = 0;
1841 #ifdef AHD_DEBUG
1842 if ((ahd_debug & AHD_SHOW_QFULL) != 0) {
1843 ahd_print_path(ahd, scb);
1844 printf("Dropping tag count to %d\n",
1845 dev->active);
1846 }
1847 #endif
1848 if (dev->active == dev->tags_on_last_queuefull) {
1849
1850 dev->last_queuefull_same_count++;
1851 /*
1852 * If we repeatedly see a queue full
1853 * at the same queue depth, this
1854 * device has a fixed number of tag
1855 * slots. Lock in this tag depth
1856 * so we stop seeing queue fulls from
1857 * this device.
1858 */
1859 if (dev->last_queuefull_same_count
1860 == AHD_LOCK_TAGS_COUNT) {
1861 dev->maxtags = dev->active;
1862 ahd_print_path(ahd, scb);
1863 printf("Locking max tag count at %d\n",
1864 dev->active);
1865 }
1866 } else {
1867 dev->tags_on_last_queuefull = dev->active;
1868 dev->last_queuefull_same_count = 0;
1869 }
1870 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ);
1871 ahd_set_scsi_status(scb, SCSI_STATUS_OK);
1872 ahd_platform_set_tags(ahd, sdev, &devinfo,
1873 (dev->flags & AHD_DEV_Q_BASIC)
1874 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1875 break;
1876 }
1877 /*
1878 * Drop down to a single opening, and treat this
1879 * as if the target returned BUSY SCSI status.
1880 */
1881 dev->openings = 1;
1882 ahd_platform_set_tags(ahd, sdev, &devinfo,
1883 (dev->flags & AHD_DEV_Q_BASIC)
1884 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED);
1885 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY);
1886 }
1887 }
1888
1889 static void
1890 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
1891 {
1892 int status;
1893 int new_status = DID_OK;
1894 int do_fallback = 0;
1895 int scsi_status;
1896
1897 /*
1898 * Map CAM error codes into Linux Error codes. We
1899 * avoid the conversion so that the DV code has the
1900 * full error information available when making
1901 * state change decisions.
1902 */
1903
1904 status = ahd_cmd_get_transaction_status(cmd);
1905 switch (status) {
1906 case CAM_REQ_INPROG:
1907 case CAM_REQ_CMP:
1908 new_status = DID_OK;
1909 break;
1910 case CAM_AUTOSENSE_FAIL:
1911 new_status = DID_ERROR;
1912 /* Fallthrough */
1913 case CAM_SCSI_STATUS_ERROR:
1914 scsi_status = ahd_cmd_get_scsi_status(cmd);
1915
1916 switch(scsi_status) {
1917 case SCSI_STATUS_CMD_TERMINATED:
1918 case SCSI_STATUS_CHECK_COND:
1919 if ((cmd->result >> 24) != DRIVER_SENSE) {
1920 do_fallback = 1;
1921 } else {
1922 struct scsi_sense_data *sense;
1923
1924 sense = (struct scsi_sense_data *)
1925 &cmd->sense_buffer;
1926 if (sense->extra_len >= 5 &&
1927 (sense->add_sense_code == 0x47
1928 || sense->add_sense_code == 0x48))
1929 do_fallback = 1;
1930 }
1931 break;
1932 default:
1933 break;
1934 }
1935 break;
1936 case CAM_REQ_ABORTED:
1937 new_status = DID_ABORT;
1938 break;
1939 case CAM_BUSY:
1940 new_status = DID_BUS_BUSY;
1941 break;
1942 case CAM_REQ_INVALID:
1943 case CAM_PATH_INVALID:
1944 new_status = DID_BAD_TARGET;
1945 break;
1946 case CAM_SEL_TIMEOUT:
1947 new_status = DID_NO_CONNECT;
1948 break;
1949 case CAM_SCSI_BUS_RESET:
1950 case CAM_BDR_SENT:
1951 new_status = DID_RESET;
1952 break;
1953 case CAM_UNCOR_PARITY:
1954 new_status = DID_PARITY;
1955 do_fallback = 1;
1956 break;
1957 case CAM_CMD_TIMEOUT:
1958 new_status = DID_TIME_OUT;
1959 do_fallback = 1;
1960 break;
1961 case CAM_REQ_CMP_ERR:
1962 case CAM_UNEXP_BUSFREE:
1963 case CAM_DATA_RUN_ERR:
1964 new_status = DID_ERROR;
1965 do_fallback = 1;
1966 break;
1967 case CAM_UA_ABORT:
1968 case CAM_NO_HBA:
1969 case CAM_SEQUENCE_FAIL:
1970 case CAM_CCB_LEN_ERR:
1971 case CAM_PROVIDE_FAIL:
1972 case CAM_REQ_TERMIO:
1973 case CAM_UNREC_HBA_ERROR:
1974 case CAM_REQ_TOO_BIG:
1975 new_status = DID_ERROR;
1976 break;
1977 case CAM_REQUEUE_REQ:
1978 new_status = DID_REQUEUE;
1979 break;
1980 default:
1981 /* We should never get here */
1982 new_status = DID_ERROR;
1983 break;
1984 }
1985
1986 if (do_fallback) {
1987 printf("%s: device overrun (status %x) on %d:%d:%d\n",
1988 ahd_name(ahd), status, cmd->device->channel,
1989 cmd->device->id, cmd->device->lun);
1990 }
1991
1992 ahd_cmd_set_transaction_status(cmd, new_status);
1993
1994 cmd->scsi_done(cmd);
1995 }
1996
1997 static void
1998 ahd_freeze_simq(struct ahd_softc *ahd)
1999 {
2000 scsi_block_requests(ahd->platform_data->host);
2001 }
2002
2003 static void
2004 ahd_release_simq(struct ahd_softc *ahd)
2005 {
2006 scsi_unblock_requests(ahd->platform_data->host);
2007 }
2008
2009 static int
2010 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd)
2011 {
2012 struct ahd_softc *ahd;
2013 struct ahd_linux_device *dev;
2014 struct scb *pending_scb;
2015 u_int saved_scbptr;
2016 u_int active_scbptr;
2017 u_int last_phase;
2018 u_int saved_scsiid;
2019 u_int cdb_byte;
2020 int retval;
2021 int was_paused;
2022 int paused;
2023 int wait;
2024 int disconnected;
2025 ahd_mode_state saved_modes;
2026 unsigned long flags;
2027
2028 pending_scb = NULL;
2029 paused = FALSE;
2030 wait = FALSE;
2031 ahd = *(struct ahd_softc **)cmd->device->host->hostdata;
2032
2033 scmd_printk(KERN_INFO, cmd,
2034 "Attempting to queue an ABORT message:");
2035
2036 printf("CDB:");
2037 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++)
2038 printf(" 0x%x", cmd->cmnd[cdb_byte]);
2039 printf("\n");
2040
2041 ahd_lock(ahd, &flags);
2042
2043 /*
2044 * First determine if we currently own this command.
2045 * Start by searching the device queue. If not found
2046 * there, check the pending_scb list. If not found
2047 * at all, and the system wanted us to just abort the
2048 * command, return success.
2049 */
2050 dev = scsi_transport_device_data(cmd->device);
2051
2052 if (dev == NULL) {
2053 /*
2054 * No target device for this command exists,
2055 * so we must not still own the command.
2056 */
2057 scmd_printk(KERN_INFO, cmd, "Is not an active device\n");
2058 retval = SUCCESS;
2059 goto no_cmd;
2060 }
2061
2062 /*
2063 * See if we can find a matching cmd in the pending list.
2064 */
2065 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) {
2066 if (pending_scb->io_ctx == cmd)
2067 break;
2068 }
2069
2070 if (pending_scb == NULL) {
2071 scmd_printk(KERN_INFO, cmd, "Command not found\n");
2072 goto no_cmd;
2073 }
2074
2075 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) {
2076 /*
2077 * We can't queue two recovery actions using the same SCB
2078 */
2079 retval = FAILED;
2080 goto done;
2081 }
2082
2083 /*
2084 * Ensure that the card doesn't do anything
2085 * behind our back. Also make sure that we
2086 * didn't "just" miss an interrupt that would
2087 * affect this cmd.
2088 */
2089 was_paused = ahd_is_paused(ahd);
2090 ahd_pause_and_flushwork(ahd);
2091 paused = TRUE;
2092
2093 if ((pending_scb->flags & SCB_ACTIVE) == 0) {
2094 scmd_printk(KERN_INFO, cmd, "Command already completed\n");
2095 goto no_cmd;
2096 }
2097
2098 printf("%s: At time of recovery, card was %spaused\n",
2099 ahd_name(ahd), was_paused ? "" : "not ");
2100 ahd_dump_card_state(ahd);
2101
2102 disconnected = TRUE;
2103 if (ahd_search_qinfifo(ahd, cmd->device->id,
2104 cmd->device->channel + 'A',
2105 cmd->device->lun,
2106 pending_scb->hscb->tag,
2107 ROLE_INITIATOR, CAM_REQ_ABORTED,
2108 SEARCH_COMPLETE) > 0) {
2109 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n",
2110 ahd_name(ahd), cmd->device->channel,
2111 cmd->device->id, cmd->device->lun);
2112 retval = SUCCESS;
2113 goto done;
2114 }
2115
2116 saved_modes = ahd_save_modes(ahd);
2117 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI);
2118 last_phase = ahd_inb(ahd, LASTPHASE);
2119 saved_scbptr = ahd_get_scbptr(ahd);
2120 active_scbptr = saved_scbptr;
2121 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) {
2122 struct scb *bus_scb;
2123
2124 bus_scb = ahd_lookup_scb(ahd, active_scbptr);
2125 if (bus_scb == pending_scb)
2126 disconnected = FALSE;
2127 }
2128
2129 /*
2130 * At this point, pending_scb is the scb associated with the
2131 * passed in command. That command is currently active on the
2132 * bus or is in the disconnected state.
2133 */
2134 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID);
2135 if (last_phase != P_BUSFREE
2136 && SCB_GET_TAG(pending_scb) == active_scbptr) {
2137
2138 /*
2139 * We're active on the bus, so assert ATN
2140 * and hope that the target responds.
2141 */
2142 pending_scb = ahd_lookup_scb(ahd, active_scbptr);
2143 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2144 ahd_outb(ahd, MSG_OUT, HOST_MSG);
2145 ahd_outb(ahd, SCSISIGO, last_phase|ATNO);
2146 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n");
2147 wait = TRUE;
2148 } else if (disconnected) {
2149
2150 /*
2151 * Actually re-queue this SCB in an attempt
2152 * to select the device before it reconnects.
2153 */
2154 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT;
2155 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb));
2156 pending_scb->hscb->cdb_len = 0;
2157 pending_scb->hscb->task_attribute = 0;
2158 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK;
2159
2160 if ((pending_scb->flags & SCB_PACKETIZED) != 0) {
2161 /*
2162 * Mark the SCB has having an outstanding
2163 * task management function. Should the command
2164 * complete normally before the task management
2165 * function can be sent, the host will be notified
2166 * to abort our requeued SCB.
2167 */
2168 ahd_outb(ahd, SCB_TASK_MANAGEMENT,
2169 pending_scb->hscb->task_management);
2170 } else {
2171 /*
2172 * If non-packetized, set the MK_MESSAGE control
2173 * bit indicating that we desire to send a message.
2174 * We also set the disconnected flag since there is
2175 * no guarantee that our SCB control byte matches
2176 * the version on the card. We don't want the
2177 * sequencer to abort the command thinking an
2178 * unsolicited reselection occurred.
2179 */
2180 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED;
2181
2182 /*
2183 * The sequencer will never re-reference the
2184 * in-core SCB. To make sure we are notified
2185 * during reslection, set the MK_MESSAGE flag in
2186 * the card's copy of the SCB.
2187 */
2188 ahd_outb(ahd, SCB_CONTROL,
2189 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE);
2190 }
2191
2192 /*
2193 * Clear out any entries in the QINFIFO first
2194 * so we are the next SCB for this target
2195 * to run.
2196 */
2197 ahd_search_qinfifo(ahd, cmd->device->id,
2198 cmd->device->channel + 'A', cmd->device->lun,
2199 SCB_LIST_NULL, ROLE_INITIATOR,
2200 CAM_REQUEUE_REQ, SEARCH_COMPLETE);
2201 ahd_qinfifo_requeue_tail(ahd, pending_scb);
2202 ahd_set_scbptr(ahd, saved_scbptr);
2203 ahd_print_path(ahd, pending_scb);
2204 printf("Device is disconnected, re-queuing SCB\n");
2205 wait = TRUE;
2206 } else {
2207 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n");
2208 retval = FAILED;
2209 goto done;
2210 }
2211
2212 no_cmd:
2213 /*
2214 * Our assumption is that if we don't have the command, no
2215 * recovery action was required, so we return success. Again,
2216 * the semantics of the mid-layer recovery engine are not
2217 * well defined, so this may change in time.
2218 */
2219 retval = SUCCESS;
2220 done:
2221 if (paused)
2222 ahd_unpause(ahd);
2223 if (wait) {
2224 DECLARE_COMPLETION_ONSTACK(done);
2225
2226 ahd->platform_data->eh_done = &done;
2227 ahd_unlock(ahd, &flags);
2228
2229 printf("%s: Recovery code sleeping\n", ahd_name(ahd));
2230 if (!wait_for_completion_timeout(&done, 5 * HZ)) {
2231 ahd_lock(ahd, &flags);
2232 ahd->platform_data->eh_done = NULL;
2233 ahd_unlock(ahd, &flags);
2234 printf("%s: Timer Expired (active %d)\n",
2235 ahd_name(ahd), dev->active);
2236 retval = FAILED;
2237 }
2238 printf("Recovery code awake\n");
2239 } else
2240 ahd_unlock(ahd, &flags);
2241
2242 if (retval != SUCCESS)
2243 printf("%s: Command abort returning 0x%x\n",
2244 ahd_name(ahd), retval);
2245
2246 return retval;
2247 }
2248
2249 static void ahd_linux_set_width(struct scsi_target *starget, int width)
2250 {
2251 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2252 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2253 struct ahd_devinfo devinfo;
2254 unsigned long flags;
2255
2256 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2257 starget->channel + 'A', ROLE_INITIATOR);
2258 ahd_lock(ahd, &flags);
2259 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE);
2260 ahd_unlock(ahd, &flags);
2261 }
2262
2263 static void ahd_linux_set_period(struct scsi_target *starget, int period)
2264 {
2265 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2266 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2267 struct ahd_tmode_tstate *tstate;
2268 struct ahd_initiator_tinfo *tinfo
2269 = ahd_fetch_transinfo(ahd,
2270 starget->channel + 'A',
2271 shost->this_id, starget->id, &tstate);
2272 struct ahd_devinfo devinfo;
2273 unsigned int ppr_options = tinfo->goal.ppr_options;
2274 unsigned int dt;
2275 unsigned long flags;
2276 unsigned long offset = tinfo->goal.offset;
2277
2278 #ifdef AHD_DEBUG
2279 if ((ahd_debug & AHD_SHOW_DV) != 0)
2280 printf("%s: set period to %d\n", ahd_name(ahd), period);
2281 #endif
2282 if (offset == 0)
2283 offset = MAX_OFFSET;
2284
2285 if (period < 8)
2286 period = 8;
2287 if (period < 10) {
2288 if (spi_max_width(starget)) {
2289 ppr_options |= MSG_EXT_PPR_DT_REQ;
2290 if (period == 8)
2291 ppr_options |= MSG_EXT_PPR_IU_REQ;
2292 } else
2293 period = 10;
2294 }
2295
2296 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2297
2298 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2299 starget->channel + 'A', ROLE_INITIATOR);
2300
2301 /* all PPR requests apart from QAS require wide transfers */
2302 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) {
2303 if (spi_width(starget) == 0)
2304 ppr_options &= MSG_EXT_PPR_QAS_REQ;
2305 }
2306
2307 ahd_find_syncrate(ahd, &period, &ppr_options,
2308 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2309
2310 ahd_lock(ahd, &flags);
2311 ahd_set_syncrate(ahd, &devinfo, period, offset,
2312 ppr_options, AHD_TRANS_GOAL, FALSE);
2313 ahd_unlock(ahd, &flags);
2314 }
2315
2316 static void ahd_linux_set_offset(struct scsi_target *starget, int offset)
2317 {
2318 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2319 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2320 struct ahd_tmode_tstate *tstate;
2321 struct ahd_initiator_tinfo *tinfo
2322 = ahd_fetch_transinfo(ahd,
2323 starget->channel + 'A',
2324 shost->this_id, starget->id, &tstate);
2325 struct ahd_devinfo devinfo;
2326 unsigned int ppr_options = 0;
2327 unsigned int period = 0;
2328 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2329 unsigned long flags;
2330
2331 #ifdef AHD_DEBUG
2332 if ((ahd_debug & AHD_SHOW_DV) != 0)
2333 printf("%s: set offset to %d\n", ahd_name(ahd), offset);
2334 #endif
2335
2336 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2337 starget->channel + 'A', ROLE_INITIATOR);
2338 if (offset != 0) {
2339 period = tinfo->goal.period;
2340 ppr_options = tinfo->goal.ppr_options;
2341 ahd_find_syncrate(ahd, &period, &ppr_options,
2342 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2343 }
2344
2345 ahd_lock(ahd, &flags);
2346 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options,
2347 AHD_TRANS_GOAL, FALSE);
2348 ahd_unlock(ahd, &flags);
2349 }
2350
2351 static void ahd_linux_set_dt(struct scsi_target *starget, int dt)
2352 {
2353 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2354 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2355 struct ahd_tmode_tstate *tstate;
2356 struct ahd_initiator_tinfo *tinfo
2357 = ahd_fetch_transinfo(ahd,
2358 starget->channel + 'A',
2359 shost->this_id, starget->id, &tstate);
2360 struct ahd_devinfo devinfo;
2361 unsigned int ppr_options = tinfo->goal.ppr_options
2362 & ~MSG_EXT_PPR_DT_REQ;
2363 unsigned int period = tinfo->goal.period;
2364 unsigned int width = tinfo->goal.width;
2365 unsigned long flags;
2366
2367 #ifdef AHD_DEBUG
2368 if ((ahd_debug & AHD_SHOW_DV) != 0)
2369 printf("%s: %s DT\n", ahd_name(ahd),
2370 dt ? "enabling" : "disabling");
2371 #endif
2372 if (dt && spi_max_width(starget)) {
2373 ppr_options |= MSG_EXT_PPR_DT_REQ;
2374 if (!width)
2375 ahd_linux_set_width(starget, 1);
2376 } else {
2377 if (period <= 9)
2378 period = 10; /* If resetting DT, period must be >= 25ns */
2379 /* IU is invalid without DT set */
2380 ppr_options &= ~MSG_EXT_PPR_IU_REQ;
2381 }
2382 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2383 starget->channel + 'A', ROLE_INITIATOR);
2384 ahd_find_syncrate(ahd, &period, &ppr_options,
2385 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2386
2387 ahd_lock(ahd, &flags);
2388 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2389 ppr_options, AHD_TRANS_GOAL, FALSE);
2390 ahd_unlock(ahd, &flags);
2391 }
2392
2393 static void ahd_linux_set_qas(struct scsi_target *starget, int qas)
2394 {
2395 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2396 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2397 struct ahd_tmode_tstate *tstate;
2398 struct ahd_initiator_tinfo *tinfo
2399 = ahd_fetch_transinfo(ahd,
2400 starget->channel + 'A',
2401 shost->this_id, starget->id, &tstate);
2402 struct ahd_devinfo devinfo;
2403 unsigned int ppr_options = tinfo->goal.ppr_options
2404 & ~MSG_EXT_PPR_QAS_REQ;
2405 unsigned int period = tinfo->goal.period;
2406 unsigned int dt;
2407 unsigned long flags;
2408
2409 #ifdef AHD_DEBUG
2410 if ((ahd_debug & AHD_SHOW_DV) != 0)
2411 printf("%s: %s QAS\n", ahd_name(ahd),
2412 qas ? "enabling" : "disabling");
2413 #endif
2414
2415 if (qas) {
2416 ppr_options |= MSG_EXT_PPR_QAS_REQ;
2417 }
2418
2419 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2420
2421 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2422 starget->channel + 'A', ROLE_INITIATOR);
2423 ahd_find_syncrate(ahd, &period, &ppr_options,
2424 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2425
2426 ahd_lock(ahd, &flags);
2427 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2428 ppr_options, AHD_TRANS_GOAL, FALSE);
2429 ahd_unlock(ahd, &flags);
2430 }
2431
2432 static void ahd_linux_set_iu(struct scsi_target *starget, int iu)
2433 {
2434 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2435 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2436 struct ahd_tmode_tstate *tstate;
2437 struct ahd_initiator_tinfo *tinfo
2438 = ahd_fetch_transinfo(ahd,
2439 starget->channel + 'A',
2440 shost->this_id, starget->id, &tstate);
2441 struct ahd_devinfo devinfo;
2442 unsigned int ppr_options = tinfo->goal.ppr_options
2443 & ~MSG_EXT_PPR_IU_REQ;
2444 unsigned int period = tinfo->goal.period;
2445 unsigned int dt;
2446 unsigned long flags;
2447
2448 #ifdef AHD_DEBUG
2449 if ((ahd_debug & AHD_SHOW_DV) != 0)
2450 printf("%s: %s IU\n", ahd_name(ahd),
2451 iu ? "enabling" : "disabling");
2452 #endif
2453
2454 if (iu && spi_max_width(starget)) {
2455 ppr_options |= MSG_EXT_PPR_IU_REQ;
2456 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */
2457 }
2458
2459 dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2460
2461 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2462 starget->channel + 'A', ROLE_INITIATOR);
2463 ahd_find_syncrate(ahd, &period, &ppr_options,
2464 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2465
2466 ahd_lock(ahd, &flags);
2467 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2468 ppr_options, AHD_TRANS_GOAL, FALSE);
2469 ahd_unlock(ahd, &flags);
2470 }
2471
2472 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm)
2473 {
2474 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2475 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2476 struct ahd_tmode_tstate *tstate;
2477 struct ahd_initiator_tinfo *tinfo
2478 = ahd_fetch_transinfo(ahd,
2479 starget->channel + 'A',
2480 shost->this_id, starget->id, &tstate);
2481 struct ahd_devinfo devinfo;
2482 unsigned int ppr_options = tinfo->goal.ppr_options
2483 & ~MSG_EXT_PPR_RD_STRM;
2484 unsigned int period = tinfo->goal.period;
2485 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2486 unsigned long flags;
2487
2488 #ifdef AHD_DEBUG
2489 if ((ahd_debug & AHD_SHOW_DV) != 0)
2490 printf("%s: %s Read Streaming\n", ahd_name(ahd),
2491 rdstrm ? "enabling" : "disabling");
2492 #endif
2493
2494 if (rdstrm && spi_max_width(starget))
2495 ppr_options |= MSG_EXT_PPR_RD_STRM;
2496
2497 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2498 starget->channel + 'A', ROLE_INITIATOR);
2499 ahd_find_syncrate(ahd, &period, &ppr_options,
2500 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2501
2502 ahd_lock(ahd, &flags);
2503 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2504 ppr_options, AHD_TRANS_GOAL, FALSE);
2505 ahd_unlock(ahd, &flags);
2506 }
2507
2508 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow)
2509 {
2510 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2511 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2512 struct ahd_tmode_tstate *tstate;
2513 struct ahd_initiator_tinfo *tinfo
2514 = ahd_fetch_transinfo(ahd,
2515 starget->channel + 'A',
2516 shost->this_id, starget->id, &tstate);
2517 struct ahd_devinfo devinfo;
2518 unsigned int ppr_options = tinfo->goal.ppr_options
2519 & ~MSG_EXT_PPR_WR_FLOW;
2520 unsigned int period = tinfo->goal.period;
2521 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2522 unsigned long flags;
2523
2524 #ifdef AHD_DEBUG
2525 if ((ahd_debug & AHD_SHOW_DV) != 0)
2526 printf("%s: %s Write Flow Control\n", ahd_name(ahd),
2527 wrflow ? "enabling" : "disabling");
2528 #endif
2529
2530 if (wrflow && spi_max_width(starget))
2531 ppr_options |= MSG_EXT_PPR_WR_FLOW;
2532
2533 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2534 starget->channel + 'A', ROLE_INITIATOR);
2535 ahd_find_syncrate(ahd, &period, &ppr_options,
2536 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2537
2538 ahd_lock(ahd, &flags);
2539 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2540 ppr_options, AHD_TRANS_GOAL, FALSE);
2541 ahd_unlock(ahd, &flags);
2542 }
2543
2544 static void ahd_linux_set_rti(struct scsi_target *starget, int rti)
2545 {
2546 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2547 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2548 struct ahd_tmode_tstate *tstate;
2549 struct ahd_initiator_tinfo *tinfo
2550 = ahd_fetch_transinfo(ahd,
2551 starget->channel + 'A',
2552 shost->this_id, starget->id, &tstate);
2553 struct ahd_devinfo devinfo;
2554 unsigned int ppr_options = tinfo->goal.ppr_options
2555 & ~MSG_EXT_PPR_RTI;
2556 unsigned int period = tinfo->goal.period;
2557 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2558 unsigned long flags;
2559
2560 if ((ahd->features & AHD_RTI) == 0) {
2561 #ifdef AHD_DEBUG
2562 if ((ahd_debug & AHD_SHOW_DV) != 0)
2563 printf("%s: RTI not available\n", ahd_name(ahd));
2564 #endif
2565 return;
2566 }
2567
2568 #ifdef AHD_DEBUG
2569 if ((ahd_debug & AHD_SHOW_DV) != 0)
2570 printf("%s: %s RTI\n", ahd_name(ahd),
2571 rti ? "enabling" : "disabling");
2572 #endif
2573
2574 if (rti && spi_max_width(starget))
2575 ppr_options |= MSG_EXT_PPR_RTI;
2576
2577 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2578 starget->channel + 'A', ROLE_INITIATOR);
2579 ahd_find_syncrate(ahd, &period, &ppr_options,
2580 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2581
2582 ahd_lock(ahd, &flags);
2583 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2584 ppr_options, AHD_TRANS_GOAL, FALSE);
2585 ahd_unlock(ahd, &flags);
2586 }
2587
2588 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp)
2589 {
2590 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2591 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2592 struct ahd_tmode_tstate *tstate;
2593 struct ahd_initiator_tinfo *tinfo
2594 = ahd_fetch_transinfo(ahd,
2595 starget->channel + 'A',
2596 shost->this_id, starget->id, &tstate);
2597 struct ahd_devinfo devinfo;
2598 unsigned int ppr_options = tinfo->goal.ppr_options
2599 & ~MSG_EXT_PPR_PCOMP_EN;
2600 unsigned int period = tinfo->goal.period;
2601 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2602 unsigned long flags;
2603
2604 #ifdef AHD_DEBUG
2605 if ((ahd_debug & AHD_SHOW_DV) != 0)
2606 printf("%s: %s Precompensation\n", ahd_name(ahd),
2607 pcomp ? "Enable" : "Disable");
2608 #endif
2609
2610 if (pcomp && spi_max_width(starget)) {
2611 uint8_t precomp;
2612
2613 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) {
2614 struct ahd_linux_iocell_opts *iocell_opts;
2615
2616 iocell_opts = &aic79xx_iocell_info[ahd->unit];
2617 precomp = iocell_opts->precomp;
2618 } else {
2619 precomp = AIC79XX_DEFAULT_PRECOMP;
2620 }
2621 ppr_options |= MSG_EXT_PPR_PCOMP_EN;
2622 AHD_SET_PRECOMP(ahd, precomp);
2623 } else {
2624 AHD_SET_PRECOMP(ahd, 0);
2625 }
2626
2627 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2628 starget->channel + 'A', ROLE_INITIATOR);
2629 ahd_find_syncrate(ahd, &period, &ppr_options,
2630 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2631
2632 ahd_lock(ahd, &flags);
2633 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2634 ppr_options, AHD_TRANS_GOAL, FALSE);
2635 ahd_unlock(ahd, &flags);
2636 }
2637
2638 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold)
2639 {
2640 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
2641 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata);
2642 struct ahd_tmode_tstate *tstate;
2643 struct ahd_initiator_tinfo *tinfo
2644 = ahd_fetch_transinfo(ahd,
2645 starget->channel + 'A',
2646 shost->this_id, starget->id, &tstate);
2647 struct ahd_devinfo devinfo;
2648 unsigned int ppr_options = tinfo->goal.ppr_options
2649 & ~MSG_EXT_PPR_HOLD_MCS;
2650 unsigned int period = tinfo->goal.period;
2651 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ;
2652 unsigned long flags;
2653
2654 if (hold && spi_max_width(starget))
2655 ppr_options |= MSG_EXT_PPR_HOLD_MCS;
2656
2657 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0,
2658 starget->channel + 'A', ROLE_INITIATOR);
2659 ahd_find_syncrate(ahd, &period, &ppr_options,
2660 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2);
2661
2662 ahd_lock(ahd, &flags);
2663 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset,
2664 ppr_options, AHD_TRANS_GOAL, FALSE);
2665 ahd_unlock(ahd, &flags);
2666 }
2667
2668 static void ahd_linux_get_signalling(struct Scsi_Host *shost)
2669 {
2670 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata;
2671 unsigned long flags;
2672 u8 mode;
2673
2674 ahd_lock(ahd, &flags);
2675 ahd_pause(ahd);
2676 mode = ahd_inb(ahd, SBLKCTL);
2677 ahd_unpause(ahd);
2678 ahd_unlock(ahd, &flags);
2679
2680 if (mode & ENAB40)
2681 spi_signalling(shost) = SPI_SIGNAL_LVD;
2682 else if (mode & ENAB20)
2683 spi_signalling(shost) = SPI_SIGNAL_SE;
2684 else
2685 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN;
2686 }
2687
2688 static struct spi_function_template ahd_linux_transport_functions = {
2689 .set_offset = ahd_linux_set_offset,
2690 .show_offset = 1,
2691 .set_period = ahd_linux_set_period,
2692 .show_period = 1,
2693 .set_width = ahd_linux_set_width,
2694 .show_width = 1,
2695 .set_dt = ahd_linux_set_dt,
2696 .show_dt = 1,
2697 .set_iu = ahd_linux_set_iu,
2698 .show_iu = 1,
2699 .set_qas = ahd_linux_set_qas,
2700 .show_qas = 1,
2701 .set_rd_strm = ahd_linux_set_rd_strm,
2702 .show_rd_strm = 1,
2703 .set_wr_flow = ahd_linux_set_wr_flow,
2704 .show_wr_flow = 1,
2705 .set_rti = ahd_linux_set_rti,
2706 .show_rti = 1,
2707 .set_pcomp_en = ahd_linux_set_pcomp_en,
2708 .show_pcomp_en = 1,
2709 .set_hold_mcs = ahd_linux_set_hold_mcs,
2710 .show_hold_mcs = 1,
2711 .get_signalling = ahd_linux_get_signalling,
2712 };
2713
2714 static int __init
2715 ahd_linux_init(void)
2716 {
2717 int error = 0;
2718
2719 /*
2720 * If we've been passed any parameters, process them now.
2721 */
2722 if (aic79xx)
2723 aic79xx_setup(aic79xx);
2724
2725 ahd_linux_transport_template =
2726 spi_attach_transport(&ahd_linux_transport_functions);
2727 if (!ahd_linux_transport_template)
2728 return -ENODEV;
2729
2730 scsi_transport_reserve_device(ahd_linux_transport_template,
2731 sizeof(struct ahd_linux_device));
2732
2733 error = ahd_linux_pci_init();
2734 if (error)
2735 spi_release_transport(ahd_linux_transport_template);
2736 return error;
2737 }
2738
2739 static void __exit
2740 ahd_linux_exit(void)
2741 {
2742 ahd_linux_pci_exit();
2743 spi_release_transport(ahd_linux_transport_template);
2744 }
2745
2746 module_init(ahd_linux_init);
2747 module_exit(ahd_linux_exit);
WRT350N Kernel Patches